1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2021 Free Software Foundation, Inc.
5 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
6 Inc. with support from Florida State University (under contract
7 with the Ada Joint Program Office), and Silicon Graphics, Inc.
8 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
9 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
12 This file is part of GDB.
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 3 of the License, or
17 (at your option) any later version.
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 /* FIXME: Various die-reading functions need to be more careful with
28 reading off the end of the section.
29 E.g., load_partial_dies, read_partial_die. */
32 #include "dwarf2/read.h"
33 #include "dwarf2/abbrev.h"
34 #include "dwarf2/attribute.h"
35 #include "dwarf2/comp-unit.h"
36 #include "dwarf2/index-cache.h"
37 #include "dwarf2/index-common.h"
38 #include "dwarf2/leb.h"
39 #include "dwarf2/line-header.h"
40 #include "dwarf2/dwz.h"
41 #include "dwarf2/macro.h"
42 #include "dwarf2/die.h"
43 #include "dwarf2/stringify.h"
52 #include "gdb-demangle.h"
53 #include "filenames.h" /* for DOSish file names */
55 #include "complaints.h"
56 #include "dwarf2/expr.h"
57 #include "dwarf2/loc.h"
58 #include "cp-support.h"
64 #include "typeprint.h"
69 #include "gdbcore.h" /* for gnutarget */
70 #include "gdb/gdb-index.h"
75 #include "namespace.h"
76 #include "gdbsupport/function-view.h"
77 #include "gdbsupport/gdb_optional.h"
78 #include "gdbsupport/underlying.h"
79 #include "gdbsupport/hash_enum.h"
80 #include "filename-seen-cache.h"
84 #include <unordered_map>
85 #include "gdbsupport/selftest.h"
86 #include "rust-lang.h"
87 #include "gdbsupport/pathstuff.h"
88 #include "count-one-bits.h"
89 #include "debuginfod-support.h"
91 /* When == 1, print basic high level tracing messages.
92 When > 1, be more verbose.
93 This is in contrast to the low level DIE reading of dwarf_die_debug. */
94 static unsigned int dwarf_read_debug
= 0;
96 /* Print a "dwarf-read" debug statement if dwarf_read_debug is >= 1. */
98 #define dwarf_read_debug_printf(fmt, ...) \
99 debug_prefixed_printf_cond (dwarf_read_debug >= 1, "dwarf-read", fmt, \
102 /* Print a "dwarf-read" debug statement if dwarf_read_debug is >= 2. */
104 #define dwarf_read_debug_printf_v(fmt, ...) \
105 debug_prefixed_printf_cond (dwarf_read_debug >= 2, "dwarf-read", fmt, \
108 /* When non-zero, dump DIEs after they are read in. */
109 static unsigned int dwarf_die_debug
= 0;
111 /* When non-zero, dump line number entries as they are read in. */
112 unsigned int dwarf_line_debug
= 0;
114 /* When true, cross-check physname against demangler. */
115 static bool check_physname
= false;
117 /* When true, do not reject deprecated .gdb_index sections. */
118 static bool use_deprecated_index_sections
= false;
120 /* This is used to store the data that is always per objfile. */
121 static const objfile_key
<dwarf2_per_objfile
> dwarf2_objfile_data_key
;
123 /* These are used to store the dwarf2_per_bfd objects.
125 objfiles having the same BFD, which doesn't require relocations, are going to
126 share a dwarf2_per_bfd object, which is held in the _bfd_data_key version.
128 Other objfiles are not going to share a dwarf2_per_bfd with any other
129 objfiles, so they'll have their own version kept in the _objfile_data_key
131 static const struct bfd_key
<dwarf2_per_bfd
> dwarf2_per_bfd_bfd_data_key
;
132 static const struct objfile_key
<dwarf2_per_bfd
> dwarf2_per_bfd_objfile_data_key
;
134 /* The "aclass" indices for various kinds of computed DWARF symbols. */
136 static int dwarf2_locexpr_index
;
137 static int dwarf2_loclist_index
;
138 static int dwarf2_locexpr_block_index
;
139 static int dwarf2_loclist_block_index
;
141 /* Size of .debug_loclists section header for 32-bit DWARF format. */
142 #define LOCLIST_HEADER_SIZE32 12
144 /* Size of .debug_loclists section header for 64-bit DWARF format. */
145 #define LOCLIST_HEADER_SIZE64 20
147 /* Size of .debug_rnglists section header for 32-bit DWARF format. */
148 #define RNGLIST_HEADER_SIZE32 12
150 /* Size of .debug_rnglists section header for 64-bit DWARF format. */
151 #define RNGLIST_HEADER_SIZE64 20
153 /* An index into a (C++) symbol name component in a symbol name as
154 recorded in the mapped_index's symbol table. For each C++ symbol
155 in the symbol table, we record one entry for the start of each
156 component in the symbol in a table of name components, and then
157 sort the table, in order to be able to binary search symbol names,
158 ignoring leading namespaces, both completion and regular look up.
159 For example, for symbol "A::B::C", we'll have an entry that points
160 to "A::B::C", another that points to "B::C", and another for "C".
161 Note that function symbols in GDB index have no parameter
162 information, just the function/method names. You can convert a
163 name_component to a "const char *" using the
164 'mapped_index::symbol_name_at(offset_type)' method. */
166 struct name_component
168 /* Offset in the symbol name where the component starts. Stored as
169 a (32-bit) offset instead of a pointer to save memory and improve
170 locality on 64-bit architectures. */
171 offset_type name_offset
;
173 /* The symbol's index in the symbol and constant pool tables of a
178 /* Base class containing bits shared by both .gdb_index and
179 .debug_name indexes. */
181 struct mapped_index_base
183 mapped_index_base () = default;
184 DISABLE_COPY_AND_ASSIGN (mapped_index_base
);
186 /* The name_component table (a sorted vector). See name_component's
187 description above. */
188 std::vector
<name_component
> name_components
;
190 /* How NAME_COMPONENTS is sorted. */
191 enum case_sensitivity name_components_casing
;
193 /* Return the number of names in the symbol table. */
194 virtual size_t symbol_name_count () const = 0;
196 /* Get the name of the symbol at IDX in the symbol table. */
197 virtual const char *symbol_name_at
198 (offset_type idx
, dwarf2_per_objfile
*per_objfile
) const = 0;
200 /* Return whether the name at IDX in the symbol table should be
202 virtual bool symbol_name_slot_invalid (offset_type idx
) const
207 /* Build the symbol name component sorted vector, if we haven't
209 void build_name_components (dwarf2_per_objfile
*per_objfile
);
211 /* Returns the lower (inclusive) and upper (exclusive) bounds of the
212 possible matches for LN_NO_PARAMS in the name component
214 std::pair
<std::vector
<name_component
>::const_iterator
,
215 std::vector
<name_component
>::const_iterator
>
216 find_name_components_bounds (const lookup_name_info
&ln_no_params
,
218 dwarf2_per_objfile
*per_objfile
) const;
220 /* Prevent deleting/destroying via a base class pointer. */
222 ~mapped_index_base() = default;
225 /* A description of the mapped index. The file format is described in
226 a comment by the code that writes the index. */
227 struct mapped_index final
: public mapped_index_base
229 /* A slot/bucket in the symbol table hash. */
230 struct symbol_table_slot
232 const offset_type name
;
233 const offset_type vec
;
236 /* Index data format version. */
239 /* The address table data. */
240 gdb::array_view
<const gdb_byte
> address_table
;
242 /* The symbol table, implemented as a hash table. */
243 gdb::array_view
<symbol_table_slot
> symbol_table
;
245 /* A pointer to the constant pool. */
246 const char *constant_pool
= nullptr;
248 bool symbol_name_slot_invalid (offset_type idx
) const override
250 const auto &bucket
= this->symbol_table
[idx
];
251 return bucket
.name
== 0 && bucket
.vec
== 0;
254 /* Convenience method to get at the name of the symbol at IDX in the
256 const char *symbol_name_at
257 (offset_type idx
, dwarf2_per_objfile
*per_objfile
) const override
258 { return this->constant_pool
+ MAYBE_SWAP (this->symbol_table
[idx
].name
); }
260 size_t symbol_name_count () const override
261 { return this->symbol_table
.size (); }
264 /* A description of the mapped .debug_names.
265 Uninitialized map has CU_COUNT 0. */
266 struct mapped_debug_names final
: public mapped_index_base
268 bfd_endian dwarf5_byte_order
;
269 bool dwarf5_is_dwarf64
;
270 bool augmentation_is_gdb
;
272 uint32_t cu_count
= 0;
273 uint32_t tu_count
, bucket_count
, name_count
;
274 const gdb_byte
*cu_table_reordered
, *tu_table_reordered
;
275 const uint32_t *bucket_table_reordered
, *hash_table_reordered
;
276 const gdb_byte
*name_table_string_offs_reordered
;
277 const gdb_byte
*name_table_entry_offs_reordered
;
278 const gdb_byte
*entry_pool
;
285 /* Attribute name DW_IDX_*. */
288 /* Attribute form DW_FORM_*. */
291 /* Value if FORM is DW_FORM_implicit_const. */
292 LONGEST implicit_const
;
294 std::vector
<attr
> attr_vec
;
297 std::unordered_map
<ULONGEST
, index_val
> abbrev_map
;
299 const char *namei_to_name
300 (uint32_t namei
, dwarf2_per_objfile
*per_objfile
) const;
302 /* Implementation of the mapped_index_base virtual interface, for
303 the name_components cache. */
305 const char *symbol_name_at
306 (offset_type idx
, dwarf2_per_objfile
*per_objfile
) const override
307 { return namei_to_name (idx
, per_objfile
); }
309 size_t symbol_name_count () const override
310 { return this->name_count
; }
313 /* See dwarf2read.h. */
316 get_dwarf2_per_objfile (struct objfile
*objfile
)
318 return dwarf2_objfile_data_key
.get (objfile
);
321 /* Default names of the debugging sections. */
323 /* Note that if the debugging section has been compressed, it might
324 have a name like .zdebug_info. */
326 static const struct dwarf2_debug_sections dwarf2_elf_names
=
328 { ".debug_info", ".zdebug_info" },
329 { ".debug_abbrev", ".zdebug_abbrev" },
330 { ".debug_line", ".zdebug_line" },
331 { ".debug_loc", ".zdebug_loc" },
332 { ".debug_loclists", ".zdebug_loclists" },
333 { ".debug_macinfo", ".zdebug_macinfo" },
334 { ".debug_macro", ".zdebug_macro" },
335 { ".debug_str", ".zdebug_str" },
336 { ".debug_str_offsets", ".zdebug_str_offsets" },
337 { ".debug_line_str", ".zdebug_line_str" },
338 { ".debug_ranges", ".zdebug_ranges" },
339 { ".debug_rnglists", ".zdebug_rnglists" },
340 { ".debug_types", ".zdebug_types" },
341 { ".debug_addr", ".zdebug_addr" },
342 { ".debug_frame", ".zdebug_frame" },
343 { ".eh_frame", NULL
},
344 { ".gdb_index", ".zgdb_index" },
345 { ".debug_names", ".zdebug_names" },
346 { ".debug_aranges", ".zdebug_aranges" },
350 /* List of DWO/DWP sections. */
352 static const struct dwop_section_names
354 struct dwarf2_section_names abbrev_dwo
;
355 struct dwarf2_section_names info_dwo
;
356 struct dwarf2_section_names line_dwo
;
357 struct dwarf2_section_names loc_dwo
;
358 struct dwarf2_section_names loclists_dwo
;
359 struct dwarf2_section_names macinfo_dwo
;
360 struct dwarf2_section_names macro_dwo
;
361 struct dwarf2_section_names rnglists_dwo
;
362 struct dwarf2_section_names str_dwo
;
363 struct dwarf2_section_names str_offsets_dwo
;
364 struct dwarf2_section_names types_dwo
;
365 struct dwarf2_section_names cu_index
;
366 struct dwarf2_section_names tu_index
;
370 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
371 { ".debug_info.dwo", ".zdebug_info.dwo" },
372 { ".debug_line.dwo", ".zdebug_line.dwo" },
373 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
374 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
375 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
376 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
377 { ".debug_rnglists.dwo", ".zdebug_rnglists.dwo" },
378 { ".debug_str.dwo", ".zdebug_str.dwo" },
379 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
380 { ".debug_types.dwo", ".zdebug_types.dwo" },
381 { ".debug_cu_index", ".zdebug_cu_index" },
382 { ".debug_tu_index", ".zdebug_tu_index" },
385 /* local data types */
387 /* The location list and range list sections (.debug_loclists & .debug_rnglists)
388 begin with a header, which contains the following information. */
389 struct loclists_rnglists_header
391 /* A 4-byte or 12-byte length containing the length of the
392 set of entries for this compilation unit, not including the
393 length field itself. */
396 /* A 2-byte version identifier. */
399 /* A 1-byte unsigned integer containing the size in bytes of an address on
400 the target system. */
401 unsigned char addr_size
;
403 /* A 1-byte unsigned integer containing the size in bytes of a segment selector
404 on the target system. */
405 unsigned char segment_collector_size
;
407 /* A 4-byte count of the number of offsets that follow the header. */
408 unsigned int offset_entry_count
;
411 /* Type used for delaying computation of method physnames.
412 See comments for compute_delayed_physnames. */
413 struct delayed_method_info
415 /* The type to which the method is attached, i.e., its parent class. */
418 /* The index of the method in the type's function fieldlists. */
421 /* The index of the method in the fieldlist. */
424 /* The name of the DIE. */
427 /* The DIE associated with this method. */
428 struct die_info
*die
;
431 /* Internal state when decoding a particular compilation unit. */
434 explicit dwarf2_cu (dwarf2_per_cu_data
*per_cu
,
435 dwarf2_per_objfile
*per_objfile
);
437 DISABLE_COPY_AND_ASSIGN (dwarf2_cu
);
439 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
440 Create the set of symtabs used by this TU, or if this TU is sharing
441 symtabs with another TU and the symtabs have already been created
442 then restore those symtabs in the line header.
443 We don't need the pc/line-number mapping for type units. */
444 void setup_type_unit_groups (struct die_info
*die
);
446 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
447 buildsym_compunit constructor. */
448 struct compunit_symtab
*start_symtab (const char *name
,
449 const char *comp_dir
,
452 /* Reset the builder. */
453 void reset_builder () { m_builder
.reset (); }
455 /* Return a type that is a generic pointer type, the size of which
456 matches the address size given in the compilation unit header for
458 struct type
*addr_type () const;
460 /* Find an integer type the same size as the address size given in
461 the compilation unit header for this CU. UNSIGNED_P controls if
462 the integer is unsigned or not. */
463 struct type
*addr_sized_int_type (bool unsigned_p
) const;
465 /* The header of the compilation unit. */
466 struct comp_unit_head header
{};
468 /* Base address of this compilation unit. */
469 gdb::optional
<CORE_ADDR
> base_address
;
471 /* The language we are debugging. */
472 enum language language
= language_unknown
;
473 const struct language_defn
*language_defn
= nullptr;
475 const char *producer
= nullptr;
478 /* The symtab builder for this CU. This is only non-NULL when full
479 symbols are being read. */
480 std::unique_ptr
<buildsym_compunit
> m_builder
;
483 /* The generic symbol table building routines have separate lists for
484 file scope symbols and all all other scopes (local scopes). So
485 we need to select the right one to pass to add_symbol_to_list().
486 We do it by keeping a pointer to the correct list in list_in_scope.
488 FIXME: The original dwarf code just treated the file scope as the
489 first local scope, and all other local scopes as nested local
490 scopes, and worked fine. Check to see if we really need to
491 distinguish these in buildsym.c. */
492 struct pending
**list_in_scope
= nullptr;
494 /* Hash table holding all the loaded partial DIEs
495 with partial_die->offset.SECT_OFF as hash. */
496 htab_t partial_dies
= nullptr;
498 /* Storage for things with the same lifetime as this read-in compilation
499 unit, including partial DIEs. */
500 auto_obstack comp_unit_obstack
;
502 /* Backlink to our per_cu entry. */
503 struct dwarf2_per_cu_data
*per_cu
;
505 /* The dwarf2_per_objfile that owns this. */
506 dwarf2_per_objfile
*per_objfile
;
508 /* How many compilation units ago was this CU last referenced? */
511 /* A hash table of DIE cu_offset for following references with
512 die_info->offset.sect_off as hash. */
513 htab_t die_hash
= nullptr;
515 /* Full DIEs if read in. */
516 struct die_info
*dies
= nullptr;
518 /* A set of pointers to dwarf2_per_cu_data objects for compilation
519 units referenced by this one. Only set during full symbol processing;
520 partial symbol tables do not have dependencies. */
521 htab_t dependencies
= nullptr;
523 /* Header data from the line table, during full symbol processing. */
524 struct line_header
*line_header
= nullptr;
525 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
526 it's owned by dwarf2_per_bfd::line_header_hash. If non-NULL,
527 this is the DW_TAG_compile_unit die for this CU. We'll hold on
528 to the line header as long as this DIE is being processed. See
529 process_die_scope. */
530 die_info
*line_header_die_owner
= nullptr;
532 /* A list of methods which need to have physnames computed
533 after all type information has been read. */
534 std::vector
<delayed_method_info
> method_list
;
536 /* To be copied to symtab->call_site_htab. */
537 htab_t call_site_htab
= nullptr;
539 /* Non-NULL if this CU came from a DWO file.
540 There is an invariant here that is important to remember:
541 Except for attributes copied from the top level DIE in the "main"
542 (or "stub") file in preparation for reading the DWO file
543 (e.g., DW_AT_addr_base), we KISS: there is only *one* CU.
544 Either there isn't a DWO file (in which case this is NULL and the point
545 is moot), or there is and either we're not going to read it (in which
546 case this is NULL) or there is and we are reading it (in which case this
548 struct dwo_unit
*dwo_unit
= nullptr;
550 /* The DW_AT_addr_base (DW_AT_GNU_addr_base) attribute if present.
551 Note this value comes from the Fission stub CU/TU's DIE. */
552 gdb::optional
<ULONGEST
> addr_base
;
554 /* The DW_AT_rnglists_base attribute if present.
555 Note this value comes from the Fission stub CU/TU's DIE.
556 Also note that the value is zero in the non-DWO case so this value can
557 be used without needing to know whether DWO files are in use or not.
558 N.B. This does not apply to DW_AT_ranges appearing in
559 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
560 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
561 DW_AT_rnglists_base *would* have to be applied, and we'd have to care
562 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
563 ULONGEST ranges_base
= 0;
565 /* The DW_AT_loclists_base attribute if present. */
566 ULONGEST loclist_base
= 0;
568 /* When reading debug info generated by older versions of rustc, we
569 have to rewrite some union types to be struct types with a
570 variant part. This rewriting must be done after the CU is fully
571 read in, because otherwise at the point of rewriting some struct
572 type might not have been fully processed. So, we keep a list of
573 all such types here and process them after expansion. */
574 std::vector
<struct type
*> rust_unions
;
576 /* The DW_AT_str_offsets_base attribute if present. For DWARF 4 version DWO
577 files, the value is implicitly zero. For DWARF 5 version DWO files, the
578 value is often implicit and is the size of the header of
579 .debug_str_offsets section (8 or 4, depending on the address size). */
580 gdb::optional
<ULONGEST
> str_offsets_base
;
582 /* Mark used when releasing cached dies. */
585 /* This CU references .debug_loc. See the symtab->locations_valid field.
586 This test is imperfect as there may exist optimized debug code not using
587 any location list and still facing inlining issues if handled as
588 unoptimized code. For a future better test see GCC PR other/32998. */
589 bool has_loclist
: 1;
591 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is true
592 if all the producer_is_* fields are valid. This information is cached
593 because profiling CU expansion showed excessive time spent in
594 producer_is_gxx_lt_4_6. */
595 bool checked_producer
: 1;
596 bool producer_is_gxx_lt_4_6
: 1;
597 bool producer_is_gcc_lt_4_3
: 1;
598 bool producer_is_icc
: 1;
599 bool producer_is_icc_lt_14
: 1;
600 bool producer_is_codewarrior
: 1;
602 /* When true, the file that we're processing is known to have
603 debugging info for C++ namespaces. GCC 3.3.x did not produce
604 this information, but later versions do. */
606 bool processing_has_namespace_info
: 1;
608 struct partial_die_info
*find_partial_die (sect_offset sect_off
);
610 /* If this CU was inherited by another CU (via specification,
611 abstract_origin, etc), this is the ancestor CU. */
614 /* Get the buildsym_compunit for this CU. */
615 buildsym_compunit
*get_builder ()
617 /* If this CU has a builder associated with it, use that. */
618 if (m_builder
!= nullptr)
619 return m_builder
.get ();
621 /* Otherwise, search ancestors for a valid builder. */
622 if (ancestor
!= nullptr)
623 return ancestor
->get_builder ();
629 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
630 This includes type_unit_group and quick_file_names. */
632 struct stmt_list_hash
634 /* The DWO unit this table is from or NULL if there is none. */
635 struct dwo_unit
*dwo_unit
;
637 /* Offset in .debug_line or .debug_line.dwo. */
638 sect_offset line_sect_off
;
641 /* Each element of dwarf2_per_bfd->type_unit_groups is a pointer to
642 an object of this type. This contains elements of type unit groups
643 that can be shared across objfiles. The non-shareable parts are in
644 type_unit_group_unshareable. */
646 struct type_unit_group
648 /* dwarf2read.c's main "handle" on a TU symtab.
649 To simplify things we create an artificial CU that "includes" all the
650 type units using this stmt_list so that the rest of the code still has
651 a "per_cu" handle on the symtab. */
652 struct dwarf2_per_cu_data per_cu
;
654 /* The TUs that share this DW_AT_stmt_list entry.
655 This is added to while parsing type units to build partial symtabs,
656 and is deleted afterwards and not used again. */
657 std::vector
<signatured_type
*> *tus
;
659 /* The data used to construct the hash key. */
660 struct stmt_list_hash hash
;
663 /* These sections are what may appear in a (real or virtual) DWO file. */
667 struct dwarf2_section_info abbrev
;
668 struct dwarf2_section_info line
;
669 struct dwarf2_section_info loc
;
670 struct dwarf2_section_info loclists
;
671 struct dwarf2_section_info macinfo
;
672 struct dwarf2_section_info macro
;
673 struct dwarf2_section_info rnglists
;
674 struct dwarf2_section_info str
;
675 struct dwarf2_section_info str_offsets
;
676 /* In the case of a virtual DWO file, these two are unused. */
677 struct dwarf2_section_info info
;
678 std::vector
<dwarf2_section_info
> types
;
681 /* CUs/TUs in DWP/DWO files. */
685 /* Backlink to the containing struct dwo_file. */
686 struct dwo_file
*dwo_file
;
688 /* The "id" that distinguishes this CU/TU.
689 .debug_info calls this "dwo_id", .debug_types calls this "signature".
690 Since signatures came first, we stick with it for consistency. */
693 /* The section this CU/TU lives in, in the DWO file. */
694 struct dwarf2_section_info
*section
;
696 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
697 sect_offset sect_off
;
700 /* For types, offset in the type's DIE of the type defined by this TU. */
701 cu_offset type_offset_in_tu
;
704 /* include/dwarf2.h defines the DWP section codes.
705 It defines a max value but it doesn't define a min value, which we
706 use for error checking, so provide one. */
708 enum dwp_v2_section_ids
713 /* Data for one DWO file.
715 This includes virtual DWO files (a virtual DWO file is a DWO file as it
716 appears in a DWP file). DWP files don't really have DWO files per se -
717 comdat folding of types "loses" the DWO file they came from, and from
718 a high level view DWP files appear to contain a mass of random types.
719 However, to maintain consistency with the non-DWP case we pretend DWP
720 files contain virtual DWO files, and we assign each TU with one virtual
721 DWO file (generally based on the line and abbrev section offsets -
722 a heuristic that seems to work in practice). */
726 dwo_file () = default;
727 DISABLE_COPY_AND_ASSIGN (dwo_file
);
729 /* The DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute.
730 For virtual DWO files the name is constructed from the section offsets
731 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
732 from related CU+TUs. */
733 const char *dwo_name
= nullptr;
735 /* The DW_AT_comp_dir attribute. */
736 const char *comp_dir
= nullptr;
738 /* The bfd, when the file is open. Otherwise this is NULL.
739 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
740 gdb_bfd_ref_ptr dbfd
;
742 /* The sections that make up this DWO file.
743 Remember that for virtual DWO files in DWP V2 or DWP V5, these are virtual
744 sections (for lack of a better name). */
745 struct dwo_sections sections
{};
747 /* The CUs in the file.
748 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
749 an extension to handle LLVM's Link Time Optimization output (where
750 multiple source files may be compiled into a single object/dwo pair). */
753 /* Table of TUs in the file.
754 Each element is a struct dwo_unit. */
758 /* These sections are what may appear in a DWP file. */
762 /* These are used by all DWP versions (1, 2 and 5). */
763 struct dwarf2_section_info str
;
764 struct dwarf2_section_info cu_index
;
765 struct dwarf2_section_info tu_index
;
767 /* These are only used by DWP version 2 and version 5 files.
768 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
769 sections are referenced by section number, and are not recorded here.
770 In DWP version 2 or 5 there is at most one copy of all these sections,
771 each section being (effectively) comprised of the concatenation of all of
772 the individual sections that exist in the version 1 format.
773 To keep the code simple we treat each of these concatenated pieces as a
774 section itself (a virtual section?). */
775 struct dwarf2_section_info abbrev
;
776 struct dwarf2_section_info info
;
777 struct dwarf2_section_info line
;
778 struct dwarf2_section_info loc
;
779 struct dwarf2_section_info loclists
;
780 struct dwarf2_section_info macinfo
;
781 struct dwarf2_section_info macro
;
782 struct dwarf2_section_info rnglists
;
783 struct dwarf2_section_info str_offsets
;
784 struct dwarf2_section_info types
;
787 /* These sections are what may appear in a virtual DWO file in DWP version 1.
788 A virtual DWO file is a DWO file as it appears in a DWP file. */
790 struct virtual_v1_dwo_sections
792 struct dwarf2_section_info abbrev
;
793 struct dwarf2_section_info line
;
794 struct dwarf2_section_info loc
;
795 struct dwarf2_section_info macinfo
;
796 struct dwarf2_section_info macro
;
797 struct dwarf2_section_info str_offsets
;
798 /* Each DWP hash table entry records one CU or one TU.
799 That is recorded here, and copied to dwo_unit.section. */
800 struct dwarf2_section_info info_or_types
;
803 /* Similar to virtual_v1_dwo_sections, but for DWP version 2 or 5.
804 In version 2, the sections of the DWO files are concatenated together
805 and stored in one section of that name. Thus each ELF section contains
806 several "virtual" sections. */
808 struct virtual_v2_or_v5_dwo_sections
810 bfd_size_type abbrev_offset
;
811 bfd_size_type abbrev_size
;
813 bfd_size_type line_offset
;
814 bfd_size_type line_size
;
816 bfd_size_type loc_offset
;
817 bfd_size_type loc_size
;
819 bfd_size_type loclists_offset
;
820 bfd_size_type loclists_size
;
822 bfd_size_type macinfo_offset
;
823 bfd_size_type macinfo_size
;
825 bfd_size_type macro_offset
;
826 bfd_size_type macro_size
;
828 bfd_size_type rnglists_offset
;
829 bfd_size_type rnglists_size
;
831 bfd_size_type str_offsets_offset
;
832 bfd_size_type str_offsets_size
;
834 /* Each DWP hash table entry records one CU or one TU.
835 That is recorded here, and copied to dwo_unit.section. */
836 bfd_size_type info_or_types_offset
;
837 bfd_size_type info_or_types_size
;
840 /* Contents of DWP hash tables. */
842 struct dwp_hash_table
844 uint32_t version
, nr_columns
;
845 uint32_t nr_units
, nr_slots
;
846 const gdb_byte
*hash_table
, *unit_table
;
851 const gdb_byte
*indices
;
855 /* This is indexed by column number and gives the id of the section
857 #define MAX_NR_V2_DWO_SECTIONS \
858 (1 /* .debug_info or .debug_types */ \
859 + 1 /* .debug_abbrev */ \
860 + 1 /* .debug_line */ \
861 + 1 /* .debug_loc */ \
862 + 1 /* .debug_str_offsets */ \
863 + 1 /* .debug_macro or .debug_macinfo */)
864 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
865 const gdb_byte
*offsets
;
866 const gdb_byte
*sizes
;
870 /* This is indexed by column number and gives the id of the section
872 #define MAX_NR_V5_DWO_SECTIONS \
873 (1 /* .debug_info */ \
874 + 1 /* .debug_abbrev */ \
875 + 1 /* .debug_line */ \
876 + 1 /* .debug_loclists */ \
877 + 1 /* .debug_str_offsets */ \
878 + 1 /* .debug_macro */ \
879 + 1 /* .debug_rnglists */)
880 int section_ids
[MAX_NR_V5_DWO_SECTIONS
];
881 const gdb_byte
*offsets
;
882 const gdb_byte
*sizes
;
887 /* Data for one DWP file. */
891 dwp_file (const char *name_
, gdb_bfd_ref_ptr
&&abfd
)
893 dbfd (std::move (abfd
))
897 /* Name of the file. */
900 /* File format version. */
904 gdb_bfd_ref_ptr dbfd
;
906 /* Section info for this file. */
907 struct dwp_sections sections
{};
909 /* Table of CUs in the file. */
910 const struct dwp_hash_table
*cus
= nullptr;
912 /* Table of TUs in the file. */
913 const struct dwp_hash_table
*tus
= nullptr;
915 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
919 /* Table to map ELF section numbers to their sections.
920 This is only needed for the DWP V1 file format. */
921 unsigned int num_sections
= 0;
922 asection
**elf_sections
= nullptr;
925 /* Struct used to pass misc. parameters to read_die_and_children, et
926 al. which are used for both .debug_info and .debug_types dies.
927 All parameters here are unchanging for the life of the call. This
928 struct exists to abstract away the constant parameters of die reading. */
930 struct die_reader_specs
932 /* The bfd of die_section. */
935 /* The CU of the DIE we are parsing. */
936 struct dwarf2_cu
*cu
;
938 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
939 struct dwo_file
*dwo_file
;
941 /* The section the die comes from.
942 This is either .debug_info or .debug_types, or the .dwo variants. */
943 struct dwarf2_section_info
*die_section
;
945 /* die_section->buffer. */
946 const gdb_byte
*buffer
;
948 /* The end of the buffer. */
949 const gdb_byte
*buffer_end
;
951 /* The abbreviation table to use when reading the DIEs. */
952 struct abbrev_table
*abbrev_table
;
955 /* A subclass of die_reader_specs that holds storage and has complex
956 constructor and destructor behavior. */
958 class cutu_reader
: public die_reader_specs
962 cutu_reader (dwarf2_per_cu_data
*this_cu
,
963 dwarf2_per_objfile
*per_objfile
,
964 struct abbrev_table
*abbrev_table
,
965 dwarf2_cu
*existing_cu
,
968 explicit cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
969 dwarf2_per_objfile
*per_objfile
,
970 struct dwarf2_cu
*parent_cu
= nullptr,
971 struct dwo_file
*dwo_file
= nullptr);
973 DISABLE_COPY_AND_ASSIGN (cutu_reader
);
975 const gdb_byte
*info_ptr
= nullptr;
976 struct die_info
*comp_unit_die
= nullptr;
977 bool dummy_p
= false;
979 /* Release the new CU, putting it on the chain. This cannot be done
984 void init_tu_and_read_dwo_dies (dwarf2_per_cu_data
*this_cu
,
985 dwarf2_per_objfile
*per_objfile
,
986 dwarf2_cu
*existing_cu
);
988 struct dwarf2_per_cu_data
*m_this_cu
;
989 std::unique_ptr
<dwarf2_cu
> m_new_cu
;
991 /* The ordinary abbreviation table. */
992 abbrev_table_up m_abbrev_table_holder
;
994 /* The DWO abbreviation table. */
995 abbrev_table_up m_dwo_abbrev_table
;
998 /* When we construct a partial symbol table entry we only
999 need this much information. */
1000 struct partial_die_info
: public allocate_on_obstack
1002 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
1004 /* Disable assign but still keep copy ctor, which is needed
1005 load_partial_dies. */
1006 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
1008 /* Adjust the partial die before generating a symbol for it. This
1009 function may set the is_external flag or change the DIE's
1011 void fixup (struct dwarf2_cu
*cu
);
1013 /* Read a minimal amount of information into the minimal die
1015 const gdb_byte
*read (const struct die_reader_specs
*reader
,
1016 const struct abbrev_info
&abbrev
,
1017 const gdb_byte
*info_ptr
);
1019 /* Compute the name of this partial DIE. This memoizes the
1020 result, so it is safe to call multiple times. */
1021 const char *name (dwarf2_cu
*cu
);
1023 /* Offset of this DIE. */
1024 const sect_offset sect_off
;
1026 /* DWARF-2 tag for this DIE. */
1027 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1029 /* Assorted flags describing the data found in this DIE. */
1030 const unsigned int has_children
: 1;
1032 unsigned int is_external
: 1;
1033 unsigned int is_declaration
: 1;
1034 unsigned int has_type
: 1;
1035 unsigned int has_specification
: 1;
1036 unsigned int has_pc_info
: 1;
1037 unsigned int may_be_inlined
: 1;
1039 /* This DIE has been marked DW_AT_main_subprogram. */
1040 unsigned int main_subprogram
: 1;
1042 /* Flag set if the SCOPE field of this structure has been
1044 unsigned int scope_set
: 1;
1046 /* Flag set if the DIE has a byte_size attribute. */
1047 unsigned int has_byte_size
: 1;
1049 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1050 unsigned int has_const_value
: 1;
1052 /* Flag set if any of the DIE's children are template arguments. */
1053 unsigned int has_template_arguments
: 1;
1055 /* Flag set if fixup has been called on this die. */
1056 unsigned int fixup_called
: 1;
1058 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1059 unsigned int is_dwz
: 1;
1061 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1062 unsigned int spec_is_dwz
: 1;
1064 unsigned int canonical_name
: 1;
1066 /* The name of this DIE. Normally the value of DW_AT_name, but
1067 sometimes a default name for unnamed DIEs. */
1068 const char *raw_name
= nullptr;
1070 /* The linkage name, if present. */
1071 const char *linkage_name
= nullptr;
1073 /* The scope to prepend to our children. This is generally
1074 allocated on the comp_unit_obstack, so will disappear
1075 when this compilation unit leaves the cache. */
1076 const char *scope
= nullptr;
1078 /* Some data associated with the partial DIE. The tag determines
1079 which field is live. */
1082 /* The location description associated with this DIE, if any. */
1083 struct dwarf_block
*locdesc
;
1084 /* The offset of an import, for DW_TAG_imported_unit. */
1085 sect_offset sect_off
;
1088 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1089 CORE_ADDR lowpc
= 0;
1090 CORE_ADDR highpc
= 0;
1092 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1093 DW_AT_sibling, if any. */
1094 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1095 could return DW_AT_sibling values to its caller load_partial_dies. */
1096 const gdb_byte
*sibling
= nullptr;
1098 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1099 DW_AT_specification (or DW_AT_abstract_origin or
1100 DW_AT_extension). */
1101 sect_offset spec_offset
{};
1103 /* Pointers to this DIE's parent, first child, and next sibling,
1105 struct partial_die_info
*die_parent
= nullptr;
1106 struct partial_die_info
*die_child
= nullptr;
1107 struct partial_die_info
*die_sibling
= nullptr;
1109 friend struct partial_die_info
*
1110 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1113 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1114 partial_die_info (sect_offset sect_off
)
1115 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1119 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1121 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1126 has_specification
= 0;
1129 main_subprogram
= 0;
1132 has_const_value
= 0;
1133 has_template_arguments
= 0;
1141 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1142 but this would require a corresponding change in unpack_field_as_long
1144 static int bits_per_byte
= 8;
1146 struct variant_part_builder
;
1148 /* When reading a variant, we track a bit more information about the
1149 field, and store it in an object of this type. */
1151 struct variant_field
1153 int first_field
= -1;
1154 int last_field
= -1;
1156 /* A variant can contain other variant parts. */
1157 std::vector
<variant_part_builder
> variant_parts
;
1159 /* If we see a DW_TAG_variant, then this will be set if this is the
1161 bool default_branch
= false;
1162 /* If we see a DW_AT_discr_value, then this will be the discriminant
1164 ULONGEST discriminant_value
= 0;
1165 /* If we see a DW_AT_discr_list, then this is a pointer to the list
1167 struct dwarf_block
*discr_list_data
= nullptr;
1170 /* This represents a DW_TAG_variant_part. */
1172 struct variant_part_builder
1174 /* The offset of the discriminant field. */
1175 sect_offset discriminant_offset
{};
1177 /* Variants that are direct children of this variant part. */
1178 std::vector
<variant_field
> variants
;
1180 /* True if we're currently reading a variant. */
1181 bool processing_variant
= false;
1186 int accessibility
= 0;
1188 /* Variant parts need to find the discriminant, which is a DIE
1189 reference. We track the section offset of each field to make
1192 struct field field
{};
1197 const char *name
= nullptr;
1198 std::vector
<struct fn_field
> fnfields
;
1201 /* The routines that read and process dies for a C struct or C++ class
1202 pass lists of data member fields and lists of member function fields
1203 in an instance of a field_info structure, as defined below. */
1206 /* List of data member and baseclasses fields. */
1207 std::vector
<struct nextfield
> fields
;
1208 std::vector
<struct nextfield
> baseclasses
;
1210 /* Set if the accessibility of one of the fields is not public. */
1211 bool non_public_fields
= false;
1213 /* Member function fieldlist array, contains name of possibly overloaded
1214 member function, number of overloaded member functions and a pointer
1215 to the head of the member function field chain. */
1216 std::vector
<struct fnfieldlist
> fnfieldlists
;
1218 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1219 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1220 std::vector
<struct decl_field
> typedef_field_list
;
1222 /* Nested types defined by this class and the number of elements in this
1224 std::vector
<struct decl_field
> nested_types_list
;
1226 /* If non-null, this is the variant part we are currently
1228 variant_part_builder
*current_variant_part
= nullptr;
1229 /* This holds all the top-level variant parts attached to the type
1231 std::vector
<variant_part_builder
> variant_parts
;
1233 /* Return the total number of fields (including baseclasses). */
1234 int nfields () const
1236 return fields
.size () + baseclasses
.size ();
1240 /* Loaded secondary compilation units are kept in memory until they
1241 have not been referenced for the processing of this many
1242 compilation units. Set this to zero to disable caching. Cache
1243 sizes of up to at least twenty will improve startup time for
1244 typical inter-CU-reference binaries, at an obvious memory cost. */
1245 static int dwarf_max_cache_age
= 5;
1247 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1248 struct cmd_list_element
*c
, const char *value
)
1250 fprintf_filtered (file
, _("The upper bound on the age of cached "
1251 "DWARF compilation units is %s.\n"),
1255 /* local function prototypes */
1257 static void dwarf2_find_base_address (struct die_info
*die
,
1258 struct dwarf2_cu
*cu
);
1260 static dwarf2_psymtab
*create_partial_symtab
1261 (dwarf2_per_cu_data
*per_cu
, dwarf2_per_objfile
*per_objfile
,
1264 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1265 const gdb_byte
*info_ptr
,
1266 struct die_info
*type_unit_die
);
1268 static void dwarf2_build_psymtabs_hard (dwarf2_per_objfile
*per_objfile
);
1270 static void scan_partial_symbols (struct partial_die_info
*,
1271 CORE_ADDR
*, CORE_ADDR
*,
1272 int, struct dwarf2_cu
*);
1274 static void add_partial_symbol (struct partial_die_info
*,
1275 struct dwarf2_cu
*);
1277 static void add_partial_namespace (struct partial_die_info
*pdi
,
1278 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1279 int set_addrmap
, struct dwarf2_cu
*cu
);
1281 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1282 CORE_ADDR
*highpc
, int set_addrmap
,
1283 struct dwarf2_cu
*cu
);
1285 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1286 struct dwarf2_cu
*cu
);
1288 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1289 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1290 int need_pc
, struct dwarf2_cu
*cu
);
1292 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1294 static struct partial_die_info
*load_partial_dies
1295 (const struct die_reader_specs
*, const gdb_byte
*, int);
1297 /* A pair of partial_die_info and compilation unit. */
1298 struct cu_partial_die_info
1300 /* The compilation unit of the partial_die_info. */
1301 struct dwarf2_cu
*cu
;
1302 /* A partial_die_info. */
1303 struct partial_die_info
*pdi
;
1305 cu_partial_die_info (struct dwarf2_cu
*cu
, struct partial_die_info
*pdi
)
1311 cu_partial_die_info () = delete;
1314 static const struct cu_partial_die_info
find_partial_die (sect_offset
, int,
1315 struct dwarf2_cu
*);
1317 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1318 struct attribute
*, struct attr_abbrev
*,
1321 static void read_attribute_reprocess (const struct die_reader_specs
*reader
,
1322 struct attribute
*attr
, dwarf_tag tag
);
1324 static CORE_ADDR
read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
);
1326 static sect_offset
read_abbrev_offset (dwarf2_per_objfile
*per_objfile
,
1327 dwarf2_section_info
*, sect_offset
);
1329 static const char *read_indirect_string
1330 (dwarf2_per_objfile
*per_objfile
, bfd
*, const gdb_byte
*,
1331 const struct comp_unit_head
*, unsigned int *);
1333 static const char *read_indirect_string_at_offset
1334 (dwarf2_per_objfile
*per_objfile
, LONGEST str_offset
);
1336 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1340 static const char *read_dwo_str_index (const struct die_reader_specs
*reader
,
1341 ULONGEST str_index
);
1343 static const char *read_stub_str_index (struct dwarf2_cu
*cu
,
1344 ULONGEST str_index
);
1346 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1348 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1349 struct dwarf2_cu
*);
1351 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1352 struct dwarf2_cu
*cu
);
1354 static const char *dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
);
1356 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1357 struct dwarf2_cu
*cu
);
1359 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1361 static struct die_info
*die_specification (struct die_info
*die
,
1362 struct dwarf2_cu
**);
1364 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1365 struct dwarf2_cu
*cu
);
1367 static void dwarf_decode_lines (struct line_header
*, const char *,
1368 struct dwarf2_cu
*, dwarf2_psymtab
*,
1369 CORE_ADDR
, int decode_mapping
);
1371 static void dwarf2_start_subfile (struct dwarf2_cu
*, const char *,
1374 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1375 struct dwarf2_cu
*, struct symbol
* = NULL
);
1377 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1378 struct dwarf2_cu
*);
1380 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1383 struct obstack
*obstack
,
1384 struct dwarf2_cu
*cu
, LONGEST
*value
,
1385 const gdb_byte
**bytes
,
1386 struct dwarf2_locexpr_baton
**baton
);
1388 static struct type
*read_subrange_index_type (struct die_info
*die
,
1389 struct dwarf2_cu
*cu
);
1391 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1393 static int need_gnat_info (struct dwarf2_cu
*);
1395 static struct type
*die_descriptive_type (struct die_info
*,
1396 struct dwarf2_cu
*);
1398 static void set_descriptive_type (struct type
*, struct die_info
*,
1399 struct dwarf2_cu
*);
1401 static struct type
*die_containing_type (struct die_info
*,
1402 struct dwarf2_cu
*);
1404 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1405 struct dwarf2_cu
*);
1407 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1409 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1411 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1413 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1414 const char *suffix
, int physname
,
1415 struct dwarf2_cu
*cu
);
1417 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1419 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1421 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1423 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1425 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1427 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1429 /* Return the .debug_loclists section to use for cu. */
1430 static struct dwarf2_section_info
*cu_debug_loc_section (struct dwarf2_cu
*cu
);
1432 /* Return the .debug_rnglists section to use for cu. */
1433 static struct dwarf2_section_info
*cu_debug_rnglists_section
1434 (struct dwarf2_cu
*cu
, dwarf_tag tag
);
1436 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1437 values. Keep the items ordered with increasing constraints compliance. */
1440 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1441 PC_BOUNDS_NOT_PRESENT
,
1443 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1444 were present but they do not form a valid range of PC addresses. */
1447 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1450 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1454 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1455 CORE_ADDR
*, CORE_ADDR
*,
1459 static void get_scope_pc_bounds (struct die_info
*,
1460 CORE_ADDR
*, CORE_ADDR
*,
1461 struct dwarf2_cu
*);
1463 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1464 CORE_ADDR
, struct dwarf2_cu
*);
1466 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1467 struct dwarf2_cu
*);
1469 static void dwarf2_attach_fields_to_type (struct field_info
*,
1470 struct type
*, struct dwarf2_cu
*);
1472 static void dwarf2_add_member_fn (struct field_info
*,
1473 struct die_info
*, struct type
*,
1474 struct dwarf2_cu
*);
1476 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1478 struct dwarf2_cu
*);
1480 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1482 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1484 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1486 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1488 static struct using_direct
**using_directives (struct dwarf2_cu
*cu
);
1490 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1492 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1494 static struct type
*read_module_type (struct die_info
*die
,
1495 struct dwarf2_cu
*cu
);
1497 static const char *namespace_name (struct die_info
*die
,
1498 int *is_anonymous
, struct dwarf2_cu
*);
1500 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1502 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*,
1505 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1506 struct dwarf2_cu
*);
1508 static struct die_info
*read_die_and_siblings_1
1509 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1512 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1513 const gdb_byte
*info_ptr
,
1514 const gdb_byte
**new_info_ptr
,
1515 struct die_info
*parent
);
1517 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1518 struct die_info
**, const gdb_byte
*,
1521 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1522 struct die_info
**, const gdb_byte
*);
1524 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1526 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1529 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1531 static const char *dwarf2_full_name (const char *name
,
1532 struct die_info
*die
,
1533 struct dwarf2_cu
*cu
);
1535 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1536 struct dwarf2_cu
*cu
);
1538 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1539 struct dwarf2_cu
**);
1541 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1543 static void dump_die_for_error (struct die_info
*);
1545 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1548 /*static*/ void dump_die (struct die_info
*, int max_level
);
1550 static void store_in_ref_table (struct die_info
*,
1551 struct dwarf2_cu
*);
1553 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1554 const struct attribute
*,
1555 struct dwarf2_cu
**);
1557 static struct die_info
*follow_die_ref (struct die_info
*,
1558 const struct attribute
*,
1559 struct dwarf2_cu
**);
1561 static struct die_info
*follow_die_sig (struct die_info
*,
1562 const struct attribute
*,
1563 struct dwarf2_cu
**);
1565 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1566 struct dwarf2_cu
*);
1568 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1569 const struct attribute
*,
1570 struct dwarf2_cu
*);
1572 static void load_full_type_unit (dwarf2_per_cu_data
*per_cu
,
1573 dwarf2_per_objfile
*per_objfile
);
1575 static void read_signatured_type (signatured_type
*sig_type
,
1576 dwarf2_per_objfile
*per_objfile
);
1578 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1579 struct die_info
*die
, struct dwarf2_cu
*cu
,
1580 struct dynamic_prop
*prop
, struct type
*type
);
1582 /* memory allocation interface */
1584 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1586 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1588 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1590 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1591 struct dwarf2_loclist_baton
*baton
,
1592 const struct attribute
*attr
);
1594 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1596 struct dwarf2_cu
*cu
,
1599 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1600 const gdb_byte
*info_ptr
,
1601 struct abbrev_info
*abbrev
);
1603 static hashval_t
partial_die_hash (const void *item
);
1605 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1607 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1608 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1609 dwarf2_per_objfile
*per_objfile
);
1611 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1612 struct die_info
*comp_unit_die
,
1613 enum language pretend_language
);
1615 static struct type
*set_die_type (struct die_info
*, struct type
*,
1616 struct dwarf2_cu
*, bool = false);
1618 static void create_all_comp_units (dwarf2_per_objfile
*per_objfile
);
1620 static int create_all_type_units (dwarf2_per_objfile
*per_objfile
);
1622 static void load_full_comp_unit (dwarf2_per_cu_data
*per_cu
,
1623 dwarf2_per_objfile
*per_objfile
,
1624 dwarf2_cu
*existing_cu
,
1626 enum language pretend_language
);
1628 static void process_full_comp_unit (dwarf2_cu
*cu
,
1629 enum language pretend_language
);
1631 static void process_full_type_unit (dwarf2_cu
*cu
,
1632 enum language pretend_language
);
1634 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1635 struct dwarf2_per_cu_data
*);
1637 static void dwarf2_mark (struct dwarf2_cu
*);
1639 static struct type
*get_die_type_at_offset (sect_offset
,
1640 dwarf2_per_cu_data
*per_cu
,
1641 dwarf2_per_objfile
*per_objfile
);
1643 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1645 static void queue_comp_unit (dwarf2_per_cu_data
*per_cu
,
1646 dwarf2_per_objfile
*per_objfile
,
1647 enum language pretend_language
);
1649 static void process_queue (dwarf2_per_objfile
*per_objfile
);
1651 /* Class, the destructor of which frees all allocated queue entries. This
1652 will only have work to do if an error was thrown while processing the
1653 dwarf. If no error was thrown then the queue entries should have all
1654 been processed, and freed, as we went along. */
1656 class dwarf2_queue_guard
1659 explicit dwarf2_queue_guard (dwarf2_per_objfile
*per_objfile
)
1660 : m_per_objfile (per_objfile
)
1664 /* Free any entries remaining on the queue. There should only be
1665 entries left if we hit an error while processing the dwarf. */
1666 ~dwarf2_queue_guard ()
1668 /* Ensure that no memory is allocated by the queue. */
1669 std::queue
<dwarf2_queue_item
> empty
;
1670 std::swap (m_per_objfile
->per_bfd
->queue
, empty
);
1673 DISABLE_COPY_AND_ASSIGN (dwarf2_queue_guard
);
1676 dwarf2_per_objfile
*m_per_objfile
;
1679 dwarf2_queue_item::~dwarf2_queue_item ()
1681 /* Anything still marked queued is likely to be in an
1682 inconsistent state, so discard it. */
1685 per_objfile
->remove_cu (per_cu
);
1690 /* The return type of find_file_and_directory. Note, the enclosed
1691 string pointers are only valid while this object is valid. */
1693 struct file_and_directory
1695 /* The filename. This is never NULL. */
1698 /* The compilation directory. NULL if not known. If we needed to
1699 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1700 points directly to the DW_AT_comp_dir string attribute owned by
1701 the obstack that owns the DIE. */
1702 const char *comp_dir
;
1704 /* If we needed to build a new string for comp_dir, this is what
1705 owns the storage. */
1706 std::string comp_dir_storage
;
1709 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1710 struct dwarf2_cu
*cu
);
1712 static htab_up
allocate_signatured_type_table ();
1714 static htab_up
allocate_dwo_unit_table ();
1716 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1717 (dwarf2_per_objfile
*per_objfile
, struct dwp_file
*dwp_file
,
1718 const char *comp_dir
, ULONGEST signature
, int is_debug_types
);
1720 static struct dwp_file
*get_dwp_file (dwarf2_per_objfile
*per_objfile
);
1722 static struct dwo_unit
*lookup_dwo_comp_unit
1723 (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
,
1724 ULONGEST signature
);
1726 static struct dwo_unit
*lookup_dwo_type_unit
1727 (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
);
1729 static void queue_and_load_all_dwo_tus (dwarf2_cu
*cu
);
1731 /* A unique pointer to a dwo_file. */
1733 typedef std::unique_ptr
<struct dwo_file
> dwo_file_up
;
1735 static void process_cu_includes (dwarf2_per_objfile
*per_objfile
);
1737 static void check_producer (struct dwarf2_cu
*cu
);
1739 static void free_line_header_voidp (void *arg
);
1741 /* Various complaints about symbol reading that don't abort the process. */
1744 dwarf2_debug_line_missing_file_complaint (void)
1746 complaint (_(".debug_line section has line data without a file"));
1750 dwarf2_debug_line_missing_end_sequence_complaint (void)
1752 complaint (_(".debug_line section has line "
1753 "program sequence without an end"));
1757 dwarf2_complex_location_expr_complaint (void)
1759 complaint (_("location expression too complex"));
1763 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1766 complaint (_("const value length mismatch for '%s', got %d, expected %d"),
1771 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1773 complaint (_("invalid attribute class or form for '%s' in '%s'"),
1777 /* Hash function for line_header_hash. */
1780 line_header_hash (const struct line_header
*ofs
)
1782 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
1785 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1788 line_header_hash_voidp (const void *item
)
1790 const struct line_header
*ofs
= (const struct line_header
*) item
;
1792 return line_header_hash (ofs
);
1795 /* Equality function for line_header_hash. */
1798 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1800 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
1801 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
1803 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
1804 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
1809 /* See declaration. */
1811 dwarf2_per_bfd::dwarf2_per_bfd (bfd
*obfd
, const dwarf2_debug_sections
*names
,
1814 can_copy (can_copy_
)
1817 names
= &dwarf2_elf_names
;
1819 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
1820 locate_sections (obfd
, sec
, *names
);
1823 dwarf2_per_bfd::~dwarf2_per_bfd ()
1825 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
1826 per_cu
->imported_symtabs_free ();
1828 for (signatured_type
*sig_type
: all_type_units
)
1829 sig_type
->per_cu
.imported_symtabs_free ();
1831 /* Everything else should be on this->obstack. */
1837 dwarf2_per_objfile::remove_all_cus ()
1839 for (auto pair
: m_dwarf2_cus
)
1842 m_dwarf2_cus
.clear ();
1845 /* A helper class that calls free_cached_comp_units on
1848 class free_cached_comp_units
1852 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
1853 : m_per_objfile (per_objfile
)
1857 ~free_cached_comp_units ()
1859 m_per_objfile
->remove_all_cus ();
1862 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
1866 dwarf2_per_objfile
*m_per_objfile
;
1872 dwarf2_per_objfile::symtab_set_p (const dwarf2_per_cu_data
*per_cu
) const
1874 gdb_assert (per_cu
->index
< this->m_symtabs
.size ());
1876 return this->m_symtabs
[per_cu
->index
] != nullptr;
1882 dwarf2_per_objfile::get_symtab (const dwarf2_per_cu_data
*per_cu
) const
1884 gdb_assert (per_cu
->index
< this->m_symtabs
.size ());
1886 return this->m_symtabs
[per_cu
->index
];
1892 dwarf2_per_objfile::set_symtab (const dwarf2_per_cu_data
*per_cu
,
1893 compunit_symtab
*symtab
)
1895 gdb_assert (per_cu
->index
< this->m_symtabs
.size ());
1896 gdb_assert (this->m_symtabs
[per_cu
->index
] == nullptr);
1898 this->m_symtabs
[per_cu
->index
] = symtab
;
1901 /* Try to locate the sections we need for DWARF 2 debugging
1902 information and return true if we have enough to do something.
1903 NAMES points to the dwarf2 section names, or is NULL if the standard
1904 ELF names are used. CAN_COPY is true for formats where symbol
1905 interposition is possible and so symbol values must follow copy
1906 relocation rules. */
1909 dwarf2_has_info (struct objfile
*objfile
,
1910 const struct dwarf2_debug_sections
*names
,
1913 if (objfile
->flags
& OBJF_READNEVER
)
1916 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
1918 if (per_objfile
== NULL
)
1920 dwarf2_per_bfd
*per_bfd
;
1922 /* We can share a "dwarf2_per_bfd" with other objfiles if the BFD
1923 doesn't require relocations and if there aren't partial symbols
1924 from some other reader. */
1925 if (!objfile_has_partial_symbols (objfile
)
1926 && !gdb_bfd_requires_relocations (objfile
->obfd
))
1928 /* See if one has been created for this BFD yet. */
1929 per_bfd
= dwarf2_per_bfd_bfd_data_key
.get (objfile
->obfd
);
1931 if (per_bfd
== nullptr)
1933 /* No, create it now. */
1934 per_bfd
= new dwarf2_per_bfd (objfile
->obfd
, names
, can_copy
);
1935 dwarf2_per_bfd_bfd_data_key
.set (objfile
->obfd
, per_bfd
);
1940 /* No sharing possible, create one specifically for this objfile. */
1941 per_bfd
= new dwarf2_per_bfd (objfile
->obfd
, names
, can_copy
);
1942 dwarf2_per_bfd_objfile_data_key
.set (objfile
, per_bfd
);
1945 per_objfile
= dwarf2_objfile_data_key
.emplace (objfile
, objfile
, per_bfd
);
1948 return (!per_objfile
->per_bfd
->info
.is_virtual
1949 && per_objfile
->per_bfd
->info
.s
.section
!= NULL
1950 && !per_objfile
->per_bfd
->abbrev
.is_virtual
1951 && per_objfile
->per_bfd
->abbrev
.s
.section
!= NULL
);
1954 /* When loading sections, we look either for uncompressed section or for
1955 compressed section names. */
1958 section_is_p (const char *section_name
,
1959 const struct dwarf2_section_names
*names
)
1961 if (names
->normal
!= NULL
1962 && strcmp (section_name
, names
->normal
) == 0)
1964 if (names
->compressed
!= NULL
1965 && strcmp (section_name
, names
->compressed
) == 0)
1970 /* See declaration. */
1973 dwarf2_per_bfd::locate_sections (bfd
*abfd
, asection
*sectp
,
1974 const dwarf2_debug_sections
&names
)
1976 flagword aflag
= bfd_section_flags (sectp
);
1978 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
1981 else if (elf_section_data (sectp
)->this_hdr
.sh_size
1982 > bfd_get_file_size (abfd
))
1984 bfd_size_type size
= elf_section_data (sectp
)->this_hdr
.sh_size
;
1985 warning (_("Discarding section %s which has a section size (%s"
1986 ") larger than the file size [in module %s]"),
1987 bfd_section_name (sectp
), phex_nz (size
, sizeof (size
)),
1988 bfd_get_filename (abfd
));
1990 else if (section_is_p (sectp
->name
, &names
.info
))
1992 this->info
.s
.section
= sectp
;
1993 this->info
.size
= bfd_section_size (sectp
);
1995 else if (section_is_p (sectp
->name
, &names
.abbrev
))
1997 this->abbrev
.s
.section
= sectp
;
1998 this->abbrev
.size
= bfd_section_size (sectp
);
2000 else if (section_is_p (sectp
->name
, &names
.line
))
2002 this->line
.s
.section
= sectp
;
2003 this->line
.size
= bfd_section_size (sectp
);
2005 else if (section_is_p (sectp
->name
, &names
.loc
))
2007 this->loc
.s
.section
= sectp
;
2008 this->loc
.size
= bfd_section_size (sectp
);
2010 else if (section_is_p (sectp
->name
, &names
.loclists
))
2012 this->loclists
.s
.section
= sectp
;
2013 this->loclists
.size
= bfd_section_size (sectp
);
2015 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2017 this->macinfo
.s
.section
= sectp
;
2018 this->macinfo
.size
= bfd_section_size (sectp
);
2020 else if (section_is_p (sectp
->name
, &names
.macro
))
2022 this->macro
.s
.section
= sectp
;
2023 this->macro
.size
= bfd_section_size (sectp
);
2025 else if (section_is_p (sectp
->name
, &names
.str
))
2027 this->str
.s
.section
= sectp
;
2028 this->str
.size
= bfd_section_size (sectp
);
2030 else if (section_is_p (sectp
->name
, &names
.str_offsets
))
2032 this->str_offsets
.s
.section
= sectp
;
2033 this->str_offsets
.size
= bfd_section_size (sectp
);
2035 else if (section_is_p (sectp
->name
, &names
.line_str
))
2037 this->line_str
.s
.section
= sectp
;
2038 this->line_str
.size
= bfd_section_size (sectp
);
2040 else if (section_is_p (sectp
->name
, &names
.addr
))
2042 this->addr
.s
.section
= sectp
;
2043 this->addr
.size
= bfd_section_size (sectp
);
2045 else if (section_is_p (sectp
->name
, &names
.frame
))
2047 this->frame
.s
.section
= sectp
;
2048 this->frame
.size
= bfd_section_size (sectp
);
2050 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2052 this->eh_frame
.s
.section
= sectp
;
2053 this->eh_frame
.size
= bfd_section_size (sectp
);
2055 else if (section_is_p (sectp
->name
, &names
.ranges
))
2057 this->ranges
.s
.section
= sectp
;
2058 this->ranges
.size
= bfd_section_size (sectp
);
2060 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2062 this->rnglists
.s
.section
= sectp
;
2063 this->rnglists
.size
= bfd_section_size (sectp
);
2065 else if (section_is_p (sectp
->name
, &names
.types
))
2067 struct dwarf2_section_info type_section
;
2069 memset (&type_section
, 0, sizeof (type_section
));
2070 type_section
.s
.section
= sectp
;
2071 type_section
.size
= bfd_section_size (sectp
);
2073 this->types
.push_back (type_section
);
2075 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2077 this->gdb_index
.s
.section
= sectp
;
2078 this->gdb_index
.size
= bfd_section_size (sectp
);
2080 else if (section_is_p (sectp
->name
, &names
.debug_names
))
2082 this->debug_names
.s
.section
= sectp
;
2083 this->debug_names
.size
= bfd_section_size (sectp
);
2085 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
2087 this->debug_aranges
.s
.section
= sectp
;
2088 this->debug_aranges
.size
= bfd_section_size (sectp
);
2091 if ((bfd_section_flags (sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2092 && bfd_section_vma (sectp
) == 0)
2093 this->has_section_at_zero
= true;
2096 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2100 dwarf2_get_section_info (struct objfile
*objfile
,
2101 enum dwarf2_section_enum sect
,
2102 asection
**sectp
, const gdb_byte
**bufp
,
2103 bfd_size_type
*sizep
)
2105 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
2106 struct dwarf2_section_info
*info
;
2108 /* We may see an objfile without any DWARF, in which case we just
2110 if (per_objfile
== NULL
)
2119 case DWARF2_DEBUG_FRAME
:
2120 info
= &per_objfile
->per_bfd
->frame
;
2122 case DWARF2_EH_FRAME
:
2123 info
= &per_objfile
->per_bfd
->eh_frame
;
2126 gdb_assert_not_reached ("unexpected section");
2129 info
->read (objfile
);
2131 *sectp
= info
->get_bfd_section ();
2132 *bufp
= info
->buffer
;
2133 *sizep
= info
->size
;
2136 /* A helper function to find the sections for a .dwz file. */
2139 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, dwz_file
*dwz_file
)
2141 /* Note that we only support the standard ELF names, because .dwz
2142 is ELF-only (at the time of writing). */
2143 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2145 dwz_file
->abbrev
.s
.section
= sectp
;
2146 dwz_file
->abbrev
.size
= bfd_section_size (sectp
);
2148 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2150 dwz_file
->info
.s
.section
= sectp
;
2151 dwz_file
->info
.size
= bfd_section_size (sectp
);
2153 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2155 dwz_file
->str
.s
.section
= sectp
;
2156 dwz_file
->str
.size
= bfd_section_size (sectp
);
2158 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2160 dwz_file
->line
.s
.section
= sectp
;
2161 dwz_file
->line
.size
= bfd_section_size (sectp
);
2163 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2165 dwz_file
->macro
.s
.section
= sectp
;
2166 dwz_file
->macro
.size
= bfd_section_size (sectp
);
2168 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2170 dwz_file
->gdb_index
.s
.section
= sectp
;
2171 dwz_file
->gdb_index
.size
= bfd_section_size (sectp
);
2173 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2175 dwz_file
->debug_names
.s
.section
= sectp
;
2176 dwz_file
->debug_names
.size
= bfd_section_size (sectp
);
2180 /* Attempt to find a .dwz file (whose full path is represented by
2181 FILENAME) in all of the specified debug file directories provided.
2183 Return the equivalent gdb_bfd_ref_ptr of the .dwz file found, or
2184 nullptr if it could not find anything. */
2186 static gdb_bfd_ref_ptr
2187 dwz_search_other_debugdirs (std::string
&filename
, bfd_byte
*buildid
,
2190 /* Let's assume that the path represented by FILENAME has the
2191 "/.dwz/" subpath in it. This is what (most) GNU/Linux
2192 distributions do, anyway. */
2193 size_t dwz_pos
= filename
.find ("/.dwz/");
2195 if (dwz_pos
== std::string::npos
)
2198 /* This is an obvious assertion, but it's here more to educate
2199 future readers of this code that FILENAME at DWZ_POS *must*
2200 contain a directory separator. */
2201 gdb_assert (IS_DIR_SEPARATOR (filename
[dwz_pos
]));
2203 gdb_bfd_ref_ptr dwz_bfd
;
2204 std::vector
<gdb::unique_xmalloc_ptr
<char>> debugdir_vec
2205 = dirnames_to_char_ptr_vec (debug_file_directory
);
2207 for (const gdb::unique_xmalloc_ptr
<char> &debugdir
: debugdir_vec
)
2209 /* The idea is to iterate over the
2210 debug file directories provided by the user and
2211 replace the hard-coded path in the "filename" by each
2212 debug-file-directory.
2214 For example, suppose that filename is:
2216 /usr/lib/debug/.dwz/foo.dwz
2218 And suppose that we have "$HOME/bar" as the
2219 debug-file-directory. We would then adjust filename
2222 $HOME/bar/.dwz/foo.dwz
2224 which would hopefully allow us to find the alt debug
2226 std::string ddir
= debugdir
.get ();
2231 /* Make sure the current debug-file-directory ends with a
2232 directory separator. This is needed because, if FILENAME
2233 contains something like "/usr/lib/abcde/.dwz/foo.dwz" and
2234 DDIR is "/usr/lib/abc", then could wrongfully skip it
2236 if (!IS_DIR_SEPARATOR (ddir
.back ()))
2237 ddir
+= SLASH_STRING
;
2239 /* Check whether the beginning of FILENAME is DDIR. If it is,
2240 then we are dealing with a file which we already attempted to
2241 open before, so we just skip it and continue processing the
2242 remaining debug file directories. */
2243 if (filename
.size () > ddir
.size ()
2244 && filename
.compare (0, ddir
.size (), ddir
) == 0)
2247 /* Replace FILENAME's default debug-file-directory with
2249 std::string new_filename
= ddir
+ &filename
[dwz_pos
+ 1];
2251 dwz_bfd
= gdb_bfd_open (new_filename
.c_str (), gnutarget
);
2253 if (dwz_bfd
== nullptr)
2256 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2258 dwz_bfd
.reset (nullptr);
2269 /* See dwarf2read.h. */
2272 dwarf2_get_dwz_file (dwarf2_per_bfd
*per_bfd
)
2274 bfd_size_type buildid_len_arg
;
2278 if (per_bfd
->dwz_file
!= NULL
)
2279 return per_bfd
->dwz_file
.get ();
2281 bfd_set_error (bfd_error_no_error
);
2282 gdb::unique_xmalloc_ptr
<char> data
2283 (bfd_get_alt_debug_link_info (per_bfd
->obfd
,
2284 &buildid_len_arg
, &buildid
));
2287 if (bfd_get_error () == bfd_error_no_error
)
2289 error (_("could not read '.gnu_debugaltlink' section: %s"),
2290 bfd_errmsg (bfd_get_error ()));
2293 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2295 buildid_len
= (size_t) buildid_len_arg
;
2297 std::string filename
= data
.get ();
2299 if (!IS_ABSOLUTE_PATH (filename
.c_str ()))
2301 gdb::unique_xmalloc_ptr
<char> abs
2302 = gdb_realpath (bfd_get_filename (per_bfd
->obfd
));
2304 filename
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2307 /* First try the file name given in the section. If that doesn't
2308 work, try to use the build-id instead. */
2309 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
.c_str (), gnutarget
));
2310 if (dwz_bfd
!= NULL
)
2312 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2313 dwz_bfd
.reset (nullptr);
2316 if (dwz_bfd
== NULL
)
2317 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2319 if (dwz_bfd
== nullptr)
2321 /* If the user has provided us with different
2322 debug file directories, we can try them in order. */
2323 dwz_bfd
= dwz_search_other_debugdirs (filename
, buildid
, buildid_len
);
2326 if (dwz_bfd
== nullptr)
2328 gdb::unique_xmalloc_ptr
<char> alt_filename
;
2329 const char *origname
= bfd_get_filename (per_bfd
->obfd
);
2331 scoped_fd
fd (debuginfod_debuginfo_query (buildid
,
2338 /* File successfully retrieved from server. */
2339 dwz_bfd
= gdb_bfd_open (alt_filename
.get (), gnutarget
);
2341 if (dwz_bfd
== nullptr)
2342 warning (_("File \"%s\" from debuginfod cannot be opened as bfd"),
2343 alt_filename
.get ());
2344 else if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2345 dwz_bfd
.reset (nullptr);
2349 if (dwz_bfd
== NULL
)
2350 error (_("could not find '.gnu_debugaltlink' file for %s"),
2351 bfd_get_filename (per_bfd
->obfd
));
2353 std::unique_ptr
<struct dwz_file
> result
2354 (new struct dwz_file (std::move (dwz_bfd
)));
2356 for (asection
*sec
: gdb_bfd_sections (result
->dwz_bfd
))
2357 locate_dwz_sections (result
->dwz_bfd
.get (), sec
, result
.get ());
2359 gdb_bfd_record_inclusion (per_bfd
->obfd
, result
->dwz_bfd
.get ());
2360 per_bfd
->dwz_file
= std::move (result
);
2361 return per_bfd
->dwz_file
.get ();
2364 /* DWARF quick_symbols_functions support. */
2366 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2367 unique line tables, so we maintain a separate table of all .debug_line
2368 derived entries to support the sharing.
2369 All the quick functions need is the list of file names. We discard the
2370 line_header when we're done and don't need to record it here. */
2371 struct quick_file_names
2373 /* The data used to construct the hash key. */
2374 struct stmt_list_hash hash
;
2376 /* The number of entries in file_names, real_names. */
2377 unsigned int num_file_names
;
2379 /* The file names from the line table, after being run through
2381 const char **file_names
;
2383 /* The file names from the line table after being run through
2384 gdb_realpath. These are computed lazily. */
2385 const char **real_names
;
2388 /* When using the index (and thus not using psymtabs), each CU has an
2389 object of this type. This is used to hold information needed by
2390 the various "quick" methods. */
2391 struct dwarf2_per_cu_quick_data
2393 /* The file table. This can be NULL if there was no file table
2394 or it's currently not read in.
2395 NOTE: This points into dwarf2_per_objfile->per_bfd->quick_file_names_table. */
2396 struct quick_file_names
*file_names
;
2398 /* A temporary mark bit used when iterating over all CUs in
2399 expand_symtabs_matching. */
2400 unsigned int mark
: 1;
2402 /* True if we've tried to read the file table and found there isn't one.
2403 There will be no point in trying to read it again next time. */
2404 unsigned int no_file_data
: 1;
2407 /* Utility hash function for a stmt_list_hash. */
2410 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2414 if (stmt_list_hash
->dwo_unit
!= NULL
)
2415 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2416 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2420 /* Utility equality function for a stmt_list_hash. */
2423 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2424 const struct stmt_list_hash
*rhs
)
2426 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2428 if (lhs
->dwo_unit
!= NULL
2429 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2432 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2435 /* Hash function for a quick_file_names. */
2438 hash_file_name_entry (const void *e
)
2440 const struct quick_file_names
*file_data
2441 = (const struct quick_file_names
*) e
;
2443 return hash_stmt_list_entry (&file_data
->hash
);
2446 /* Equality function for a quick_file_names. */
2449 eq_file_name_entry (const void *a
, const void *b
)
2451 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2452 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2454 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2457 /* Delete function for a quick_file_names. */
2460 delete_file_name_entry (void *e
)
2462 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2465 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2467 xfree ((void*) file_data
->file_names
[i
]);
2468 if (file_data
->real_names
)
2469 xfree ((void*) file_data
->real_names
[i
]);
2472 /* The space for the struct itself lives on the obstack, so we don't
2476 /* Create a quick_file_names hash table. */
2479 create_quick_file_names_table (unsigned int nr_initial_entries
)
2481 return htab_up (htab_create_alloc (nr_initial_entries
,
2482 hash_file_name_entry
, eq_file_name_entry
,
2483 delete_file_name_entry
, xcalloc
, xfree
));
2486 /* Read in CU (dwarf2_cu object) for PER_CU in the context of PER_OBJFILE. This
2487 function is unrelated to symtabs, symtab would have to be created afterwards.
2488 You should call age_cached_comp_units after processing the CU. */
2491 load_cu (dwarf2_per_cu_data
*per_cu
, dwarf2_per_objfile
*per_objfile
,
2494 if (per_cu
->is_debug_types
)
2495 load_full_type_unit (per_cu
, per_objfile
);
2497 load_full_comp_unit (per_cu
, per_objfile
, per_objfile
->get_cu (per_cu
),
2498 skip_partial
, language_minimal
);
2500 dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
2502 return nullptr; /* Dummy CU. */
2504 dwarf2_find_base_address (cu
->dies
, cu
);
2509 /* Read in the symbols for PER_CU in the context of PER_OBJFILE. */
2512 dw2_do_instantiate_symtab (dwarf2_per_cu_data
*per_cu
,
2513 dwarf2_per_objfile
*per_objfile
, bool skip_partial
)
2515 /* Skip type_unit_groups, reading the type units they contain
2516 is handled elsewhere. */
2517 if (per_cu
->type_unit_group_p ())
2520 /* The destructor of dwarf2_queue_guard frees any entries left on
2521 the queue. After this point we're guaranteed to leave this function
2522 with the dwarf queue empty. */
2523 dwarf2_queue_guard
q_guard (per_objfile
);
2525 if (!per_objfile
->symtab_set_p (per_cu
))
2527 queue_comp_unit (per_cu
, per_objfile
, language_minimal
);
2528 dwarf2_cu
*cu
= load_cu (per_cu
, per_objfile
, skip_partial
);
2530 /* If we just loaded a CU from a DWO, and we're working with an index
2531 that may badly handle TUs, load all the TUs in that DWO as well.
2532 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2533 if (!per_cu
->is_debug_types
2535 && cu
->dwo_unit
!= NULL
2536 && per_objfile
->per_bfd
->index_table
!= NULL
2537 && per_objfile
->per_bfd
->index_table
->version
<= 7
2538 /* DWP files aren't supported yet. */
2539 && get_dwp_file (per_objfile
) == NULL
)
2540 queue_and_load_all_dwo_tus (cu
);
2543 process_queue (per_objfile
);
2545 /* Age the cache, releasing compilation units that have not
2546 been used recently. */
2547 per_objfile
->age_comp_units ();
2550 /* Ensure that the symbols for PER_CU have been read in. DWARF2_PER_OBJFILE is
2551 the per-objfile for which this symtab is instantiated.
2553 Returns the resulting symbol table. */
2555 static struct compunit_symtab
*
2556 dw2_instantiate_symtab (dwarf2_per_cu_data
*per_cu
,
2557 dwarf2_per_objfile
*per_objfile
,
2560 gdb_assert (per_objfile
->per_bfd
->using_index
);
2562 if (!per_objfile
->symtab_set_p (per_cu
))
2564 free_cached_comp_units
freer (per_objfile
);
2565 scoped_restore decrementer
= increment_reading_symtab ();
2566 dw2_do_instantiate_symtab (per_cu
, per_objfile
, skip_partial
);
2567 process_cu_includes (per_objfile
);
2570 return per_objfile
->get_symtab (per_cu
);
2573 /* See declaration. */
2575 dwarf2_per_cu_data
*
2576 dwarf2_per_bfd::get_cutu (int index
)
2578 if (index
>= this->all_comp_units
.size ())
2580 index
-= this->all_comp_units
.size ();
2581 gdb_assert (index
< this->all_type_units
.size ());
2582 return &this->all_type_units
[index
]->per_cu
;
2585 return this->all_comp_units
[index
];
2588 /* See declaration. */
2590 dwarf2_per_cu_data
*
2591 dwarf2_per_bfd::get_cu (int index
)
2593 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2595 return this->all_comp_units
[index
];
2598 /* See declaration. */
2601 dwarf2_per_bfd::get_tu (int index
)
2603 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2605 return this->all_type_units
[index
];
2610 dwarf2_per_cu_data
*
2611 dwarf2_per_bfd::allocate_per_cu ()
2613 dwarf2_per_cu_data
*result
= OBSTACK_ZALLOC (&obstack
, dwarf2_per_cu_data
);
2614 result
->per_bfd
= this;
2615 result
->index
= m_num_psymtabs
++;
2622 dwarf2_per_bfd::allocate_signatured_type ()
2624 signatured_type
*result
= OBSTACK_ZALLOC (&obstack
, signatured_type
);
2625 result
->per_cu
.per_bfd
= this;
2626 result
->per_cu
.index
= m_num_psymtabs
++;
2630 /* Return a new dwarf2_per_cu_data allocated on the per-bfd
2631 obstack, and constructed with the specified field values. */
2633 static dwarf2_per_cu_data
*
2634 create_cu_from_index_list (dwarf2_per_bfd
*per_bfd
,
2635 struct dwarf2_section_info
*section
,
2637 sect_offset sect_off
, ULONGEST length
)
2639 dwarf2_per_cu_data
*the_cu
= per_bfd
->allocate_per_cu ();
2640 the_cu
->sect_off
= sect_off
;
2641 the_cu
->length
= length
;
2642 the_cu
->section
= section
;
2643 the_cu
->v
.quick
= OBSTACK_ZALLOC (&per_bfd
->obstack
,
2644 struct dwarf2_per_cu_quick_data
);
2645 the_cu
->is_dwz
= is_dwz
;
2649 /* A helper for create_cus_from_index that handles a given list of
2653 create_cus_from_index_list (dwarf2_per_bfd
*per_bfd
,
2654 const gdb_byte
*cu_list
, offset_type n_elements
,
2655 struct dwarf2_section_info
*section
,
2658 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2660 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2662 sect_offset sect_off
2663 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2664 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2667 dwarf2_per_cu_data
*per_cu
2668 = create_cu_from_index_list (per_bfd
, section
, is_dwz
, sect_off
,
2670 per_bfd
->all_comp_units
.push_back (per_cu
);
2674 /* Read the CU list from the mapped index, and use it to create all
2675 the CU objects for PER_BFD. */
2678 create_cus_from_index (dwarf2_per_bfd
*per_bfd
,
2679 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2680 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2682 gdb_assert (per_bfd
->all_comp_units
.empty ());
2683 per_bfd
->all_comp_units
.reserve ((cu_list_elements
+ dwz_elements
) / 2);
2685 create_cus_from_index_list (per_bfd
, cu_list
, cu_list_elements
,
2688 if (dwz_elements
== 0)
2691 dwz_file
*dwz
= dwarf2_get_dwz_file (per_bfd
);
2692 create_cus_from_index_list (per_bfd
, dwz_list
, dwz_elements
,
2696 /* Create the signatured type hash table from the index. */
2699 create_signatured_type_table_from_index
2700 (dwarf2_per_bfd
*per_bfd
, struct dwarf2_section_info
*section
,
2701 const gdb_byte
*bytes
, offset_type elements
)
2703 gdb_assert (per_bfd
->all_type_units
.empty ());
2704 per_bfd
->all_type_units
.reserve (elements
/ 3);
2706 htab_up sig_types_hash
= allocate_signatured_type_table ();
2708 for (offset_type i
= 0; i
< elements
; i
+= 3)
2710 struct signatured_type
*sig_type
;
2713 cu_offset type_offset_in_tu
;
2715 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2716 sect_offset sect_off
2717 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2719 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
2721 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2724 sig_type
= per_bfd
->allocate_signatured_type ();
2725 sig_type
->signature
= signature
;
2726 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
2727 sig_type
->per_cu
.is_debug_types
= 1;
2728 sig_type
->per_cu
.section
= section
;
2729 sig_type
->per_cu
.sect_off
= sect_off
;
2730 sig_type
->per_cu
.v
.quick
2731 = OBSTACK_ZALLOC (&per_bfd
->obstack
,
2732 struct dwarf2_per_cu_quick_data
);
2734 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2737 per_bfd
->all_type_units
.push_back (sig_type
);
2740 per_bfd
->signatured_types
= std::move (sig_types_hash
);
2743 /* Create the signatured type hash table from .debug_names. */
2746 create_signatured_type_table_from_debug_names
2747 (dwarf2_per_objfile
*per_objfile
,
2748 const mapped_debug_names
&map
,
2749 struct dwarf2_section_info
*section
,
2750 struct dwarf2_section_info
*abbrev_section
)
2752 struct objfile
*objfile
= per_objfile
->objfile
;
2754 section
->read (objfile
);
2755 abbrev_section
->read (objfile
);
2757 gdb_assert (per_objfile
->per_bfd
->all_type_units
.empty ());
2758 per_objfile
->per_bfd
->all_type_units
.reserve (map
.tu_count
);
2760 htab_up sig_types_hash
= allocate_signatured_type_table ();
2762 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
2764 struct signatured_type
*sig_type
;
2767 sect_offset sect_off
2768 = (sect_offset
) (extract_unsigned_integer
2769 (map
.tu_table_reordered
+ i
* map
.offset_size
,
2771 map
.dwarf5_byte_order
));
2773 comp_unit_head cu_header
;
2774 read_and_check_comp_unit_head (per_objfile
, &cu_header
, section
,
2776 section
->buffer
+ to_underlying (sect_off
),
2779 sig_type
= per_objfile
->per_bfd
->allocate_signatured_type ();
2780 sig_type
->signature
= cu_header
.signature
;
2781 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
2782 sig_type
->per_cu
.is_debug_types
= 1;
2783 sig_type
->per_cu
.section
= section
;
2784 sig_type
->per_cu
.sect_off
= sect_off
;
2785 sig_type
->per_cu
.v
.quick
2786 = OBSTACK_ZALLOC (&per_objfile
->per_bfd
->obstack
,
2787 struct dwarf2_per_cu_quick_data
);
2789 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2792 per_objfile
->per_bfd
->all_type_units
.push_back (sig_type
);
2795 per_objfile
->per_bfd
->signatured_types
= std::move (sig_types_hash
);
2798 /* Read the address map data from the mapped index, and use it to
2799 populate the objfile's psymtabs_addrmap. */
2802 create_addrmap_from_index (dwarf2_per_objfile
*per_objfile
,
2803 struct mapped_index
*index
)
2805 struct objfile
*objfile
= per_objfile
->objfile
;
2806 struct gdbarch
*gdbarch
= objfile
->arch ();
2807 const gdb_byte
*iter
, *end
;
2808 struct addrmap
*mutable_map
;
2811 auto_obstack temp_obstack
;
2813 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2815 iter
= index
->address_table
.data ();
2816 end
= iter
+ index
->address_table
.size ();
2818 baseaddr
= objfile
->text_section_offset ();
2822 ULONGEST hi
, lo
, cu_index
;
2823 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2825 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2827 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2832 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
2833 hex_string (lo
), hex_string (hi
));
2837 if (cu_index
>= per_objfile
->per_bfd
->all_comp_units
.size ())
2839 complaint (_(".gdb_index address table has invalid CU number %u"),
2840 (unsigned) cu_index
);
2844 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
) - baseaddr
;
2845 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
) - baseaddr
;
2846 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
2847 per_objfile
->per_bfd
->get_cu (cu_index
));
2850 objfile
->partial_symtabs
->psymtabs_addrmap
2851 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2854 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
2855 populate the objfile's psymtabs_addrmap. */
2858 create_addrmap_from_aranges (dwarf2_per_objfile
*per_objfile
,
2859 struct dwarf2_section_info
*section
)
2861 struct objfile
*objfile
= per_objfile
->objfile
;
2862 bfd
*abfd
= objfile
->obfd
;
2863 struct gdbarch
*gdbarch
= objfile
->arch ();
2864 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
2866 auto_obstack temp_obstack
;
2867 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
2869 std::unordered_map
<sect_offset
,
2870 dwarf2_per_cu_data
*,
2871 gdb::hash_enum
<sect_offset
>>
2872 debug_info_offset_to_per_cu
;
2873 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
2875 const auto insertpair
2876 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
2877 if (!insertpair
.second
)
2879 warning (_("Section .debug_aranges in %s has duplicate "
2880 "debug_info_offset %s, ignoring .debug_aranges."),
2881 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
2886 section
->read (objfile
);
2888 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
2890 const gdb_byte
*addr
= section
->buffer
;
2892 while (addr
< section
->buffer
+ section
->size
)
2894 const gdb_byte
*const entry_addr
= addr
;
2895 unsigned int bytes_read
;
2897 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
2901 const gdb_byte
*const entry_end
= addr
+ entry_length
;
2902 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
2903 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
2904 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
2906 warning (_("Section .debug_aranges in %s entry at offset %s "
2907 "length %s exceeds section length %s, "
2908 "ignoring .debug_aranges."),
2909 objfile_name (objfile
),
2910 plongest (entry_addr
- section
->buffer
),
2911 plongest (bytes_read
+ entry_length
),
2912 pulongest (section
->size
));
2916 /* The version number. */
2917 const uint16_t version
= read_2_bytes (abfd
, addr
);
2921 warning (_("Section .debug_aranges in %s entry at offset %s "
2922 "has unsupported version %d, ignoring .debug_aranges."),
2923 objfile_name (objfile
),
2924 plongest (entry_addr
- section
->buffer
), version
);
2928 const uint64_t debug_info_offset
2929 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
2930 addr
+= offset_size
;
2931 const auto per_cu_it
2932 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
2933 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
2935 warning (_("Section .debug_aranges in %s entry at offset %s "
2936 "debug_info_offset %s does not exists, "
2937 "ignoring .debug_aranges."),
2938 objfile_name (objfile
),
2939 plongest (entry_addr
- section
->buffer
),
2940 pulongest (debug_info_offset
));
2943 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
2945 const uint8_t address_size
= *addr
++;
2946 if (address_size
< 1 || address_size
> 8)
2948 warning (_("Section .debug_aranges in %s entry at offset %s "
2949 "address_size %u is invalid, ignoring .debug_aranges."),
2950 objfile_name (objfile
),
2951 plongest (entry_addr
- section
->buffer
), address_size
);
2955 const uint8_t segment_selector_size
= *addr
++;
2956 if (segment_selector_size
!= 0)
2958 warning (_("Section .debug_aranges in %s entry at offset %s "
2959 "segment_selector_size %u is not supported, "
2960 "ignoring .debug_aranges."),
2961 objfile_name (objfile
),
2962 plongest (entry_addr
- section
->buffer
),
2963 segment_selector_size
);
2967 /* Must pad to an alignment boundary that is twice the address
2968 size. It is undocumented by the DWARF standard but GCC does
2970 for (size_t padding
= ((-(addr
- section
->buffer
))
2971 & (2 * address_size
- 1));
2972 padding
> 0; padding
--)
2975 warning (_("Section .debug_aranges in %s entry at offset %s "
2976 "padding is not zero, ignoring .debug_aranges."),
2977 objfile_name (objfile
),
2978 plongest (entry_addr
- section
->buffer
));
2984 if (addr
+ 2 * address_size
> entry_end
)
2986 warning (_("Section .debug_aranges in %s entry at offset %s "
2987 "address list is not properly terminated, "
2988 "ignoring .debug_aranges."),
2989 objfile_name (objfile
),
2990 plongest (entry_addr
- section
->buffer
));
2993 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
2995 addr
+= address_size
;
2996 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
2998 addr
+= address_size
;
2999 if (start
== 0 && length
== 0)
3001 if (start
== 0 && !per_objfile
->per_bfd
->has_section_at_zero
)
3003 /* Symbol was eliminated due to a COMDAT group. */
3006 ULONGEST end
= start
+ length
;
3007 start
= (gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
)
3009 end
= (gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
)
3011 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
3015 objfile
->partial_symtabs
->psymtabs_addrmap
3016 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
3019 /* Find a slot in the mapped index INDEX for the object named NAME.
3020 If NAME is found, set *VEC_OUT to point to the CU vector in the
3021 constant pool and return true. If NAME cannot be found, return
3025 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3026 offset_type
**vec_out
)
3029 offset_type slot
, step
;
3030 int (*cmp
) (const char *, const char *);
3032 gdb::unique_xmalloc_ptr
<char> without_params
;
3033 if (current_language
->la_language
== language_cplus
3034 || current_language
->la_language
== language_fortran
3035 || current_language
->la_language
== language_d
)
3037 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3040 if (strchr (name
, '(') != NULL
)
3042 without_params
= cp_remove_params (name
);
3044 if (without_params
!= NULL
)
3045 name
= without_params
.get ();
3049 /* Index version 4 did not support case insensitive searches. But the
3050 indices for case insensitive languages are built in lowercase, therefore
3051 simulate our NAME being searched is also lowercased. */
3052 hash
= mapped_index_string_hash ((index
->version
== 4
3053 && case_sensitivity
== case_sensitive_off
3054 ? 5 : index
->version
),
3057 slot
= hash
& (index
->symbol_table
.size () - 1);
3058 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
3059 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3065 const auto &bucket
= index
->symbol_table
[slot
];
3066 if (bucket
.name
== 0 && bucket
.vec
== 0)
3069 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
3070 if (!cmp (name
, str
))
3072 *vec_out
= (offset_type
*) (index
->constant_pool
3073 + MAYBE_SWAP (bucket
.vec
));
3077 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
3081 /* A helper function that reads the .gdb_index from BUFFER and fills
3082 in MAP. FILENAME is the name of the file containing the data;
3083 it is used for error reporting. DEPRECATED_OK is true if it is
3084 ok to use deprecated sections.
3086 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3087 out parameters that are filled in with information about the CU and
3088 TU lists in the section.
3090 Returns true if all went well, false otherwise. */
3093 read_gdb_index_from_buffer (const char *filename
,
3095 gdb::array_view
<const gdb_byte
> buffer
,
3096 struct mapped_index
*map
,
3097 const gdb_byte
**cu_list
,
3098 offset_type
*cu_list_elements
,
3099 const gdb_byte
**types_list
,
3100 offset_type
*types_list_elements
)
3102 const gdb_byte
*addr
= &buffer
[0];
3104 /* Version check. */
3105 offset_type version
= MAYBE_SWAP (*(offset_type
*) addr
);
3106 /* Versions earlier than 3 emitted every copy of a psymbol. This
3107 causes the index to behave very poorly for certain requests. Version 3
3108 contained incomplete addrmap. So, it seems better to just ignore such
3112 static int warning_printed
= 0;
3113 if (!warning_printed
)
3115 warning (_("Skipping obsolete .gdb_index section in %s."),
3117 warning_printed
= 1;
3121 /* Index version 4 uses a different hash function than index version
3124 Versions earlier than 6 did not emit psymbols for inlined
3125 functions. Using these files will cause GDB not to be able to
3126 set breakpoints on inlined functions by name, so we ignore these
3127 indices unless the user has done
3128 "set use-deprecated-index-sections on". */
3129 if (version
< 6 && !deprecated_ok
)
3131 static int warning_printed
= 0;
3132 if (!warning_printed
)
3135 Skipping deprecated .gdb_index section in %s.\n\
3136 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3137 to use the section anyway."),
3139 warning_printed
= 1;
3143 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3144 of the TU (for symbols coming from TUs),
3145 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3146 Plus gold-generated indices can have duplicate entries for global symbols,
3147 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3148 These are just performance bugs, and we can't distinguish gdb-generated
3149 indices from gold-generated ones, so issue no warning here. */
3151 /* Indexes with higher version than the one supported by GDB may be no
3152 longer backward compatible. */
3156 map
->version
= version
;
3158 offset_type
*metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3161 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3162 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3166 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3167 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3168 - MAYBE_SWAP (metadata
[i
]))
3172 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3173 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3175 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3178 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3179 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3181 = gdb::array_view
<mapped_index::symbol_table_slot
>
3182 ((mapped_index::symbol_table_slot
*) symbol_table
,
3183 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3186 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3191 /* Callback types for dwarf2_read_gdb_index. */
3193 typedef gdb::function_view
3194 <gdb::array_view
<const gdb_byte
>(objfile
*, dwarf2_per_bfd
*)>
3195 get_gdb_index_contents_ftype
;
3196 typedef gdb::function_view
3197 <gdb::array_view
<const gdb_byte
>(objfile
*, dwz_file
*)>
3198 get_gdb_index_contents_dwz_ftype
;
3200 /* Read .gdb_index. If everything went ok, initialize the "quick"
3201 elements of all the CUs and return 1. Otherwise, return 0. */
3204 dwarf2_read_gdb_index
3205 (dwarf2_per_objfile
*per_objfile
,
3206 get_gdb_index_contents_ftype get_gdb_index_contents
,
3207 get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz
)
3209 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3210 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3211 struct dwz_file
*dwz
;
3212 struct objfile
*objfile
= per_objfile
->objfile
;
3213 dwarf2_per_bfd
*per_bfd
= per_objfile
->per_bfd
;
3215 gdb::array_view
<const gdb_byte
> main_index_contents
3216 = get_gdb_index_contents (objfile
, per_bfd
);
3218 if (main_index_contents
.empty ())
3221 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3222 if (!read_gdb_index_from_buffer (objfile_name (objfile
),
3223 use_deprecated_index_sections
,
3224 main_index_contents
, map
.get (), &cu_list
,
3225 &cu_list_elements
, &types_list
,
3226 &types_list_elements
))
3229 /* Don't use the index if it's empty. */
3230 if (map
->symbol_table
.empty ())
3233 /* If there is a .dwz file, read it so we can get its CU list as
3235 dwz
= dwarf2_get_dwz_file (per_bfd
);
3238 struct mapped_index dwz_map
;
3239 const gdb_byte
*dwz_types_ignore
;
3240 offset_type dwz_types_elements_ignore
;
3242 gdb::array_view
<const gdb_byte
> dwz_index_content
3243 = get_gdb_index_contents_dwz (objfile
, dwz
);
3245 if (dwz_index_content
.empty ())
3248 if (!read_gdb_index_from_buffer (bfd_get_filename (dwz
->dwz_bfd
.get ()),
3249 1, dwz_index_content
, &dwz_map
,
3250 &dwz_list
, &dwz_list_elements
,
3252 &dwz_types_elements_ignore
))
3254 warning (_("could not read '.gdb_index' section from %s; skipping"),
3255 bfd_get_filename (dwz
->dwz_bfd
.get ()));
3260 create_cus_from_index (per_bfd
, cu_list
, cu_list_elements
, dwz_list
,
3263 if (types_list_elements
)
3265 /* We can only handle a single .debug_types when we have an
3267 if (per_bfd
->types
.size () != 1)
3270 dwarf2_section_info
*section
= &per_bfd
->types
[0];
3272 create_signatured_type_table_from_index (per_bfd
, section
, types_list
,
3273 types_list_elements
);
3276 create_addrmap_from_index (per_objfile
, map
.get ());
3278 per_bfd
->index_table
= std::move (map
);
3279 per_bfd
->using_index
= 1;
3280 per_bfd
->quick_file_names_table
=
3281 create_quick_file_names_table (per_bfd
->all_comp_units
.size ());
3283 /* Save partial symtabs in the per_bfd object, for the benefit of subsequent
3284 objfiles using the same BFD. */
3285 gdb_assert (per_bfd
->partial_symtabs
== nullptr);
3286 per_bfd
->partial_symtabs
= objfile
->partial_symtabs
;
3291 /* die_reader_func for dw2_get_file_names. */
3294 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3295 const gdb_byte
*info_ptr
,
3296 struct die_info
*comp_unit_die
)
3298 struct dwarf2_cu
*cu
= reader
->cu
;
3299 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3300 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
3301 struct dwarf2_per_cu_data
*lh_cu
;
3302 struct attribute
*attr
;
3304 struct quick_file_names
*qfn
;
3306 gdb_assert (! this_cu
->is_debug_types
);
3308 /* Our callers never want to match partial units -- instead they
3309 will match the enclosing full CU. */
3310 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3312 this_cu
->v
.quick
->no_file_data
= 1;
3320 sect_offset line_offset
{};
3322 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3323 if (attr
!= nullptr && attr
->form_is_unsigned ())
3325 struct quick_file_names find_entry
;
3327 line_offset
= (sect_offset
) attr
->as_unsigned ();
3329 /* We may have already read in this line header (TU line header sharing).
3330 If we have we're done. */
3331 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3332 find_entry
.hash
.line_sect_off
= line_offset
;
3333 slot
= htab_find_slot (per_objfile
->per_bfd
->quick_file_names_table
.get (),
3334 &find_entry
, INSERT
);
3337 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3341 lh
= dwarf_decode_line_header (line_offset
, cu
);
3345 lh_cu
->v
.quick
->no_file_data
= 1;
3349 qfn
= XOBNEW (&per_objfile
->per_bfd
->obstack
, struct quick_file_names
);
3350 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3351 qfn
->hash
.line_sect_off
= line_offset
;
3352 gdb_assert (slot
!= NULL
);
3355 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3358 if (strcmp (fnd
.name
, "<unknown>") != 0)
3361 qfn
->num_file_names
= offset
+ lh
->file_names_size ();
3363 XOBNEWVEC (&per_objfile
->per_bfd
->obstack
, const char *,
3364 qfn
->num_file_names
);
3366 qfn
->file_names
[0] = xstrdup (fnd
.name
);
3367 for (int i
= 0; i
< lh
->file_names_size (); ++i
)
3368 qfn
->file_names
[i
+ offset
] = lh
->file_full_name (i
+ 1,
3369 fnd
.comp_dir
).release ();
3370 qfn
->real_names
= NULL
;
3372 lh_cu
->v
.quick
->file_names
= qfn
;
3375 /* A helper for the "quick" functions which attempts to read the line
3376 table for THIS_CU. */
3378 static struct quick_file_names
*
3379 dw2_get_file_names (dwarf2_per_cu_data
*this_cu
,
3380 dwarf2_per_objfile
*per_objfile
)
3382 /* This should never be called for TUs. */
3383 gdb_assert (! this_cu
->is_debug_types
);
3384 /* Nor type unit groups. */
3385 gdb_assert (! this_cu
->type_unit_group_p ());
3387 if (this_cu
->v
.quick
->file_names
!= NULL
)
3388 return this_cu
->v
.quick
->file_names
;
3389 /* If we know there is no line data, no point in looking again. */
3390 if (this_cu
->v
.quick
->no_file_data
)
3393 cutu_reader
reader (this_cu
, per_objfile
);
3394 if (!reader
.dummy_p
)
3395 dw2_get_file_names_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
);
3397 if (this_cu
->v
.quick
->no_file_data
)
3399 return this_cu
->v
.quick
->file_names
;
3402 /* A helper for the "quick" functions which computes and caches the
3403 real path for a given file name from the line table. */
3406 dw2_get_real_path (dwarf2_per_objfile
*per_objfile
,
3407 struct quick_file_names
*qfn
, int index
)
3409 if (qfn
->real_names
== NULL
)
3410 qfn
->real_names
= OBSTACK_CALLOC (&per_objfile
->per_bfd
->obstack
,
3411 qfn
->num_file_names
, const char *);
3413 if (qfn
->real_names
[index
] == NULL
)
3414 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3416 return qfn
->real_names
[index
];
3419 static struct symtab
*
3420 dw2_find_last_source_symtab (struct objfile
*objfile
)
3422 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3423 dwarf2_per_cu_data
*dwarf_cu
= per_objfile
->per_bfd
->all_comp_units
.back ();
3424 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
, per_objfile
, false);
3429 return compunit_primary_filetab (cust
);
3432 /* Traversal function for dw2_forget_cached_source_info. */
3435 dw2_free_cached_file_names (void **slot
, void *info
)
3437 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3439 if (file_data
->real_names
)
3443 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3445 xfree ((void*) file_data
->real_names
[i
]);
3446 file_data
->real_names
[i
] = NULL
;
3454 dw2_forget_cached_source_info (struct objfile
*objfile
)
3456 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3458 htab_traverse_noresize (per_objfile
->per_bfd
->quick_file_names_table
.get (),
3459 dw2_free_cached_file_names
, NULL
);
3462 /* Helper function for dw2_map_symtabs_matching_filename that expands
3463 the symtabs and calls the iterator. */
3466 dw2_map_expand_apply (struct objfile
*objfile
,
3467 struct dwarf2_per_cu_data
*per_cu
,
3468 const char *name
, const char *real_path
,
3469 gdb::function_view
<bool (symtab
*)> callback
)
3471 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3473 /* Don't visit already-expanded CUs. */
3474 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3475 if (per_objfile
->symtab_set_p (per_cu
))
3478 /* This may expand more than one symtab, and we want to iterate over
3480 dw2_instantiate_symtab (per_cu
, per_objfile
, false);
3482 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3483 last_made
, callback
);
3486 /* Implementation of the map_symtabs_matching_filename method. */
3489 dw2_map_symtabs_matching_filename
3490 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3491 gdb::function_view
<bool (symtab
*)> callback
)
3493 const char *name_basename
= lbasename (name
);
3494 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3496 /* The rule is CUs specify all the files, including those used by
3497 any TU, so there's no need to scan TUs here. */
3499 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
3501 /* We only need to look at symtabs not already expanded. */
3502 if (per_objfile
->symtab_set_p (per_cu
))
3505 quick_file_names
*file_data
= dw2_get_file_names (per_cu
, per_objfile
);
3506 if (file_data
== NULL
)
3509 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3511 const char *this_name
= file_data
->file_names
[j
];
3512 const char *this_real_name
;
3514 if (compare_filenames_for_search (this_name
, name
))
3516 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3522 /* Before we invoke realpath, which can get expensive when many
3523 files are involved, do a quick comparison of the basenames. */
3524 if (! basenames_may_differ
3525 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3528 this_real_name
= dw2_get_real_path (per_objfile
, file_data
, j
);
3529 if (compare_filenames_for_search (this_real_name
, name
))
3531 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3537 if (real_path
!= NULL
)
3539 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3540 gdb_assert (IS_ABSOLUTE_PATH (name
));
3541 if (this_real_name
!= NULL
3542 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3544 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3556 /* Struct used to manage iterating over all CUs looking for a symbol. */
3558 struct dw2_symtab_iterator
3560 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3561 dwarf2_per_objfile
*per_objfile
;
3562 /* If set, only look for symbols that match that block. Valid values are
3563 GLOBAL_BLOCK and STATIC_BLOCK. */
3564 gdb::optional
<block_enum
> block_index
;
3565 /* The kind of symbol we're looking for. */
3567 /* The list of CUs from the index entry of the symbol,
3568 or NULL if not found. */
3570 /* The next element in VEC to look at. */
3572 /* The number of elements in VEC, or zero if there is no match. */
3574 /* Have we seen a global version of the symbol?
3575 If so we can ignore all further global instances.
3576 This is to work around gold/15646, inefficient gold-generated
3581 /* Initialize the index symtab iterator ITER, common part. */
3584 dw2_symtab_iter_init_common (struct dw2_symtab_iterator
*iter
,
3585 dwarf2_per_objfile
*per_objfile
,
3586 gdb::optional
<block_enum
> block_index
,
3589 iter
->per_objfile
= per_objfile
;
3590 iter
->block_index
= block_index
;
3591 iter
->domain
= domain
;
3593 iter
->global_seen
= 0;
3598 /* Initialize the index symtab iterator ITER, const char *NAME variant. */
3601 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3602 dwarf2_per_objfile
*per_objfile
,
3603 gdb::optional
<block_enum
> block_index
,
3607 dw2_symtab_iter_init_common (iter
, per_objfile
, block_index
, domain
);
3609 mapped_index
*index
= per_objfile
->per_bfd
->index_table
.get ();
3610 /* index is NULL if OBJF_READNOW. */
3614 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3615 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3618 /* Initialize the index symtab iterator ITER, offset_type NAMEI variant. */
3621 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3622 dwarf2_per_objfile
*per_objfile
,
3623 gdb::optional
<block_enum
> block_index
,
3624 domain_enum domain
, offset_type namei
)
3626 dw2_symtab_iter_init_common (iter
, per_objfile
, block_index
, domain
);
3628 mapped_index
*index
= per_objfile
->per_bfd
->index_table
.get ();
3629 /* index is NULL if OBJF_READNOW. */
3633 gdb_assert (!index
->symbol_name_slot_invalid (namei
));
3634 const auto &bucket
= index
->symbol_table
[namei
];
3636 iter
->vec
= (offset_type
*) (index
->constant_pool
3637 + MAYBE_SWAP (bucket
.vec
));
3638 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3641 /* Return the next matching CU or NULL if there are no more. */
3643 static struct dwarf2_per_cu_data
*
3644 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3646 dwarf2_per_objfile
*per_objfile
= iter
->per_objfile
;
3648 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3650 offset_type cu_index_and_attrs
=
3651 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3652 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3653 gdb_index_symbol_kind symbol_kind
=
3654 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3655 /* Only check the symbol attributes if they're present.
3656 Indices prior to version 7 don't record them,
3657 and indices >= 7 may elide them for certain symbols
3658 (gold does this). */
3660 (per_objfile
->per_bfd
->index_table
->version
>= 7
3661 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3663 /* Don't crash on bad data. */
3664 if (cu_index
>= (per_objfile
->per_bfd
->all_comp_units
.size ()
3665 + per_objfile
->per_bfd
->all_type_units
.size ()))
3667 complaint (_(".gdb_index entry has bad CU index"
3668 " [in module %s]"), objfile_name (per_objfile
->objfile
));
3672 dwarf2_per_cu_data
*per_cu
= per_objfile
->per_bfd
->get_cutu (cu_index
);
3674 /* Skip if already read in. */
3675 if (per_objfile
->symtab_set_p (per_cu
))
3678 /* Check static vs global. */
3681 bool is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3683 if (iter
->block_index
.has_value ())
3685 bool want_static
= *iter
->block_index
== STATIC_BLOCK
;
3687 if (is_static
!= want_static
)
3691 /* Work around gold/15646. */
3693 && symbol_kind
== GDB_INDEX_SYMBOL_KIND_TYPE
)
3695 if (iter
->global_seen
)
3698 iter
->global_seen
= 1;
3702 /* Only check the symbol's kind if it has one. */
3705 switch (iter
->domain
)
3708 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3709 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3710 /* Some types are also in VAR_DOMAIN. */
3711 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3715 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3719 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3723 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3738 static struct compunit_symtab
*
3739 dw2_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
3740 const char *name
, domain_enum domain
)
3742 struct compunit_symtab
*stab_best
= NULL
;
3743 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3745 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
3747 struct dw2_symtab_iterator iter
;
3748 struct dwarf2_per_cu_data
*per_cu
;
3750 dw2_symtab_iter_init (&iter
, per_objfile
, block_index
, domain
, name
);
3752 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3754 struct symbol
*sym
, *with_opaque
= NULL
;
3755 struct compunit_symtab
*stab
3756 = dw2_instantiate_symtab (per_cu
, per_objfile
, false);
3757 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3758 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3760 sym
= block_find_symbol (block
, name
, domain
,
3761 block_find_non_opaque_type_preferred
,
3764 /* Some caution must be observed with overloaded functions
3765 and methods, since the index will not contain any overload
3766 information (but NAME might contain it). */
3769 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
3771 if (with_opaque
!= NULL
3772 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
3775 /* Keep looking through other CUs. */
3782 dw2_print_stats (struct objfile
*objfile
)
3784 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3785 int total
= (per_objfile
->per_bfd
->all_comp_units
.size ()
3786 + per_objfile
->per_bfd
->all_type_units
.size ());
3789 for (int i
= 0; i
< total
; ++i
)
3791 dwarf2_per_cu_data
*per_cu
= per_objfile
->per_bfd
->get_cutu (i
);
3793 if (!per_objfile
->symtab_set_p (per_cu
))
3796 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3797 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3800 /* This dumps minimal information about the index.
3801 It is called via "mt print objfiles".
3802 One use is to verify .gdb_index has been loaded by the
3803 gdb.dwarf2/gdb-index.exp testcase. */
3806 dw2_dump (struct objfile
*objfile
)
3808 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3810 gdb_assert (per_objfile
->per_bfd
->using_index
);
3811 printf_filtered (".gdb_index:");
3812 if (per_objfile
->per_bfd
->index_table
!= NULL
)
3814 printf_filtered (" version %d\n",
3815 per_objfile
->per_bfd
->index_table
->version
);
3818 printf_filtered (" faked for \"readnow\"\n");
3819 printf_filtered ("\n");
3823 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3824 const char *func_name
)
3826 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3828 struct dw2_symtab_iterator iter
;
3829 struct dwarf2_per_cu_data
*per_cu
;
3831 dw2_symtab_iter_init (&iter
, per_objfile
, {}, VAR_DOMAIN
, func_name
);
3833 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3834 dw2_instantiate_symtab (per_cu
, per_objfile
, false);
3839 dw2_expand_all_symtabs (struct objfile
*objfile
)
3841 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3842 int total_units
= (per_objfile
->per_bfd
->all_comp_units
.size ()
3843 + per_objfile
->per_bfd
->all_type_units
.size ());
3845 for (int i
= 0; i
< total_units
; ++i
)
3847 dwarf2_per_cu_data
*per_cu
= per_objfile
->per_bfd
->get_cutu (i
);
3849 /* We don't want to directly expand a partial CU, because if we
3850 read it with the wrong language, then assertion failures can
3851 be triggered later on. See PR symtab/23010. So, tell
3852 dw2_instantiate_symtab to skip partial CUs -- any important
3853 partial CU will be read via DW_TAG_imported_unit anyway. */
3854 dw2_instantiate_symtab (per_cu
, per_objfile
, true);
3859 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3860 const char *fullname
)
3862 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3864 /* We don't need to consider type units here.
3865 This is only called for examining code, e.g. expand_line_sal.
3866 There can be an order of magnitude (or more) more type units
3867 than comp units, and we avoid them if we can. */
3869 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
3871 /* We only need to look at symtabs not already expanded. */
3872 if (per_objfile
->symtab_set_p (per_cu
))
3875 quick_file_names
*file_data
= dw2_get_file_names (per_cu
, per_objfile
);
3876 if (file_data
== NULL
)
3879 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3881 const char *this_fullname
= file_data
->file_names
[j
];
3883 if (filename_cmp (this_fullname
, fullname
) == 0)
3885 dw2_instantiate_symtab (per_cu
, per_objfile
, false);
3893 dw2_expand_symtabs_matching_symbol
3894 (mapped_index_base
&index
,
3895 const lookup_name_info
&lookup_name_in
,
3896 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3897 enum search_domain kind
,
3898 gdb::function_view
<bool (offset_type
)> match_callback
,
3899 dwarf2_per_objfile
*per_objfile
);
3902 dw2_expand_symtabs_matching_one
3903 (dwarf2_per_cu_data
*per_cu
,
3904 dwarf2_per_objfile
*per_objfile
,
3905 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3906 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
);
3909 dw2_map_matching_symbols
3910 (struct objfile
*objfile
,
3911 const lookup_name_info
&name
, domain_enum domain
,
3913 gdb::function_view
<symbol_found_callback_ftype
> callback
,
3914 symbol_compare_ftype
*ordered_compare
)
3917 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3919 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
3921 if (per_objfile
->per_bfd
->index_table
!= nullptr)
3923 mapped_index
&index
= *per_objfile
->per_bfd
->index_table
;
3925 const char *match_name
= name
.ada ().lookup_name ().c_str ();
3926 auto matcher
= [&] (const char *symname
)
3928 if (ordered_compare
== nullptr)
3930 return ordered_compare (symname
, match_name
) == 0;
3933 dw2_expand_symtabs_matching_symbol (index
, name
, matcher
, ALL_DOMAIN
,
3934 [&] (offset_type namei
)
3936 struct dw2_symtab_iterator iter
;
3937 struct dwarf2_per_cu_data
*per_cu
;
3939 dw2_symtab_iter_init (&iter
, per_objfile
, block_kind
, domain
,
3941 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3942 dw2_expand_symtabs_matching_one (per_cu
, per_objfile
, nullptr,
3949 /* We have -readnow: no .gdb_index, but no partial symtabs either. So,
3950 proceed assuming all symtabs have been read in. */
3953 for (compunit_symtab
*cust
: objfile
->compunits ())
3955 const struct block
*block
;
3959 block
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
3960 if (!iterate_over_symbols_terminated (block
, name
,
3966 /* Starting from a search name, return the string that finds the upper
3967 bound of all strings that start with SEARCH_NAME in a sorted name
3968 list. Returns the empty string to indicate that the upper bound is
3969 the end of the list. */
3972 make_sort_after_prefix_name (const char *search_name
)
3974 /* When looking to complete "func", we find the upper bound of all
3975 symbols that start with "func" by looking for where we'd insert
3976 the closest string that would follow "func" in lexicographical
3977 order. Usually, that's "func"-with-last-character-incremented,
3978 i.e. "fund". Mind non-ASCII characters, though. Usually those
3979 will be UTF-8 multi-byte sequences, but we can't be certain.
3980 Especially mind the 0xff character, which is a valid character in
3981 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
3982 rule out compilers allowing it in identifiers. Note that
3983 conveniently, strcmp/strcasecmp are specified to compare
3984 characters interpreted as unsigned char. So what we do is treat
3985 the whole string as a base 256 number composed of a sequence of
3986 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
3987 to 0, and carries 1 to the following more-significant position.
3988 If the very first character in SEARCH_NAME ends up incremented
3989 and carries/overflows, then the upper bound is the end of the
3990 list. The string after the empty string is also the empty
3993 Some examples of this operation:
3995 SEARCH_NAME => "+1" RESULT
3999 "\xff" "a" "\xff" => "\xff" "b"
4004 Then, with these symbols for example:
4010 completing "func" looks for symbols between "func" and
4011 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
4012 which finds "func" and "func1", but not "fund".
4016 funcÿ (Latin1 'ÿ' [0xff])
4020 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
4021 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
4025 ÿÿ (Latin1 'ÿ' [0xff])
4028 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
4029 the end of the list.
4031 std::string after
= search_name
;
4032 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
4034 if (!after
.empty ())
4035 after
.back () = (unsigned char) after
.back () + 1;
4039 /* See declaration. */
4041 std::pair
<std::vector
<name_component
>::const_iterator
,
4042 std::vector
<name_component
>::const_iterator
>
4043 mapped_index_base::find_name_components_bounds
4044 (const lookup_name_info
&lookup_name_without_params
, language lang
,
4045 dwarf2_per_objfile
*per_objfile
) const
4048 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4050 const char *lang_name
4051 = lookup_name_without_params
.language_lookup_name (lang
);
4053 /* Comparison function object for lower_bound that matches against a
4054 given symbol name. */
4055 auto lookup_compare_lower
= [&] (const name_component
&elem
,
4058 const char *elem_qualified
= this->symbol_name_at (elem
.idx
, per_objfile
);
4059 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4060 return name_cmp (elem_name
, name
) < 0;
4063 /* Comparison function object for upper_bound that matches against a
4064 given symbol name. */
4065 auto lookup_compare_upper
= [&] (const char *name
,
4066 const name_component
&elem
)
4068 const char *elem_qualified
= this->symbol_name_at (elem
.idx
, per_objfile
);
4069 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4070 return name_cmp (name
, elem_name
) < 0;
4073 auto begin
= this->name_components
.begin ();
4074 auto end
= this->name_components
.end ();
4076 /* Find the lower bound. */
4079 if (lookup_name_without_params
.completion_mode () && lang_name
[0] == '\0')
4082 return std::lower_bound (begin
, end
, lang_name
, lookup_compare_lower
);
4085 /* Find the upper bound. */
4088 if (lookup_name_without_params
.completion_mode ())
4090 /* In completion mode, we want UPPER to point past all
4091 symbols names that have the same prefix. I.e., with
4092 these symbols, and completing "func":
4094 function << lower bound
4096 other_function << upper bound
4098 We find the upper bound by looking for the insertion
4099 point of "func"-with-last-character-incremented,
4101 std::string after
= make_sort_after_prefix_name (lang_name
);
4104 return std::lower_bound (lower
, end
, after
.c_str (),
4105 lookup_compare_lower
);
4108 return std::upper_bound (lower
, end
, lang_name
, lookup_compare_upper
);
4111 return {lower
, upper
};
4114 /* See declaration. */
4117 mapped_index_base::build_name_components (dwarf2_per_objfile
*per_objfile
)
4119 if (!this->name_components
.empty ())
4122 this->name_components_casing
= case_sensitivity
;
4124 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4126 /* The code below only knows how to break apart components of C++
4127 symbol names (and other languages that use '::' as
4128 namespace/module separator) and Ada symbol names. */
4129 auto count
= this->symbol_name_count ();
4130 for (offset_type idx
= 0; idx
< count
; idx
++)
4132 if (this->symbol_name_slot_invalid (idx
))
4135 const char *name
= this->symbol_name_at (idx
, per_objfile
);
4137 /* Add each name component to the name component table. */
4138 unsigned int previous_len
= 0;
4140 if (strstr (name
, "::") != nullptr)
4142 for (unsigned int current_len
= cp_find_first_component (name
);
4143 name
[current_len
] != '\0';
4144 current_len
+= cp_find_first_component (name
+ current_len
))
4146 gdb_assert (name
[current_len
] == ':');
4147 this->name_components
.push_back ({previous_len
, idx
});
4148 /* Skip the '::'. */
4150 previous_len
= current_len
;
4155 /* Handle the Ada encoded (aka mangled) form here. */
4156 for (const char *iter
= strstr (name
, "__");
4158 iter
= strstr (iter
, "__"))
4160 this->name_components
.push_back ({previous_len
, idx
});
4162 previous_len
= iter
- name
;
4166 this->name_components
.push_back ({previous_len
, idx
});
4169 /* Sort name_components elements by name. */
4170 auto name_comp_compare
= [&] (const name_component
&left
,
4171 const name_component
&right
)
4173 const char *left_qualified
4174 = this->symbol_name_at (left
.idx
, per_objfile
);
4175 const char *right_qualified
4176 = this->symbol_name_at (right
.idx
, per_objfile
);
4178 const char *left_name
= left_qualified
+ left
.name_offset
;
4179 const char *right_name
= right_qualified
+ right
.name_offset
;
4181 return name_cmp (left_name
, right_name
) < 0;
4184 std::sort (this->name_components
.begin (),
4185 this->name_components
.end (),
4189 /* Helper for dw2_expand_symtabs_matching that works with a
4190 mapped_index_base instead of the containing objfile. This is split
4191 to a separate function in order to be able to unit test the
4192 name_components matching using a mock mapped_index_base. For each
4193 symbol name that matches, calls MATCH_CALLBACK, passing it the
4194 symbol's index in the mapped_index_base symbol table. */
4197 dw2_expand_symtabs_matching_symbol
4198 (mapped_index_base
&index
,
4199 const lookup_name_info
&lookup_name_in
,
4200 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4201 enum search_domain kind
,
4202 gdb::function_view
<bool (offset_type
)> match_callback
,
4203 dwarf2_per_objfile
*per_objfile
)
4205 lookup_name_info lookup_name_without_params
4206 = lookup_name_in
.make_ignore_params ();
4208 /* Build the symbol name component sorted vector, if we haven't
4210 index
.build_name_components (per_objfile
);
4212 /* The same symbol may appear more than once in the range though.
4213 E.g., if we're looking for symbols that complete "w", and we have
4214 a symbol named "w1::w2", we'll find the two name components for
4215 that same symbol in the range. To be sure we only call the
4216 callback once per symbol, we first collect the symbol name
4217 indexes that matched in a temporary vector and ignore
4219 std::vector
<offset_type
> matches
;
4221 struct name_and_matcher
4223 symbol_name_matcher_ftype
*matcher
;
4226 bool operator== (const name_and_matcher
&other
) const
4228 return matcher
== other
.matcher
&& strcmp (name
, other
.name
) == 0;
4232 /* A vector holding all the different symbol name matchers, for all
4234 std::vector
<name_and_matcher
> matchers
;
4236 for (int i
= 0; i
< nr_languages
; i
++)
4238 enum language lang_e
= (enum language
) i
;
4240 const language_defn
*lang
= language_def (lang_e
);
4241 symbol_name_matcher_ftype
*name_matcher
4242 = lang
->get_symbol_name_matcher (lookup_name_without_params
);
4244 name_and_matcher key
{
4246 lookup_name_without_params
.language_lookup_name (lang_e
)
4249 /* Don't insert the same comparison routine more than once.
4250 Note that we do this linear walk. This is not a problem in
4251 practice because the number of supported languages is
4253 if (std::find (matchers
.begin (), matchers
.end (), key
)
4256 matchers
.push_back (std::move (key
));
4259 = index
.find_name_components_bounds (lookup_name_without_params
,
4260 lang_e
, per_objfile
);
4262 /* Now for each symbol name in range, check to see if we have a name
4263 match, and if so, call the MATCH_CALLBACK callback. */
4265 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4267 const char *qualified
4268 = index
.symbol_name_at (bounds
.first
->idx
, per_objfile
);
4270 if (!name_matcher (qualified
, lookup_name_without_params
, NULL
)
4271 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4274 matches
.push_back (bounds
.first
->idx
);
4278 std::sort (matches
.begin (), matches
.end ());
4280 /* Finally call the callback, once per match. */
4282 for (offset_type idx
: matches
)
4286 if (!match_callback (idx
))
4292 /* Above we use a type wider than idx's for 'prev', since 0 and
4293 (offset_type)-1 are both possible values. */
4294 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4299 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4301 /* A mock .gdb_index/.debug_names-like name index table, enough to
4302 exercise dw2_expand_symtabs_matching_symbol, which works with the
4303 mapped_index_base interface. Builds an index from the symbol list
4304 passed as parameter to the constructor. */
4305 class mock_mapped_index
: public mapped_index_base
4308 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4309 : m_symbol_table (symbols
)
4312 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4314 /* Return the number of names in the symbol table. */
4315 size_t symbol_name_count () const override
4317 return m_symbol_table
.size ();
4320 /* Get the name of the symbol at IDX in the symbol table. */
4321 const char *symbol_name_at
4322 (offset_type idx
, dwarf2_per_objfile
*per_objfile
) const override
4324 return m_symbol_table
[idx
];
4328 gdb::array_view
<const char *> m_symbol_table
;
4331 /* Convenience function that converts a NULL pointer to a "<null>"
4332 string, to pass to print routines. */
4335 string_or_null (const char *str
)
4337 return str
!= NULL
? str
: "<null>";
4340 /* Check if a lookup_name_info built from
4341 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4342 index. EXPECTED_LIST is the list of expected matches, in expected
4343 matching order. If no match expected, then an empty list is
4344 specified. Returns true on success. On failure prints a warning
4345 indicating the file:line that failed, and returns false. */
4348 check_match (const char *file
, int line
,
4349 mock_mapped_index
&mock_index
,
4350 const char *name
, symbol_name_match_type match_type
,
4351 bool completion_mode
,
4352 std::initializer_list
<const char *> expected_list
,
4353 dwarf2_per_objfile
*per_objfile
)
4355 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4357 bool matched
= true;
4359 auto mismatch
= [&] (const char *expected_str
,
4362 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4363 "expected=\"%s\", got=\"%s\"\n"),
4365 (match_type
== symbol_name_match_type::FULL
4367 name
, string_or_null (expected_str
), string_or_null (got
));
4371 auto expected_it
= expected_list
.begin ();
4372 auto expected_end
= expected_list
.end ();
4374 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4376 [&] (offset_type idx
)
4378 const char *matched_name
= mock_index
.symbol_name_at (idx
, per_objfile
);
4379 const char *expected_str
4380 = expected_it
== expected_end
? NULL
: *expected_it
++;
4382 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4383 mismatch (expected_str
, matched_name
);
4387 const char *expected_str
4388 = expected_it
== expected_end
? NULL
: *expected_it
++;
4389 if (expected_str
!= NULL
)
4390 mismatch (expected_str
, NULL
);
4395 /* The symbols added to the mock mapped_index for testing (in
4397 static const char *test_symbols
[] = {
4406 "ns2::tmpl<int>::foo2",
4407 "(anonymous namespace)::A::B::C",
4409 /* These are used to check that the increment-last-char in the
4410 matching algorithm for completion doesn't match "t1_fund" when
4411 completing "t1_func". */
4417 /* A UTF-8 name with multi-byte sequences to make sure that
4418 cp-name-parser understands this as a single identifier ("função"
4419 is "function" in PT). */
4422 /* \377 (0xff) is Latin1 'ÿ'. */
4425 /* \377 (0xff) is Latin1 'ÿ'. */
4429 /* A name with all sorts of complications. Starts with "z" to make
4430 it easier for the completion tests below. */
4431 #define Z_SYM_NAME \
4432 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4433 "::tuple<(anonymous namespace)::ui*, " \
4434 "std::default_delete<(anonymous namespace)::ui>, void>"
4439 /* Returns true if the mapped_index_base::find_name_component_bounds
4440 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4441 in completion mode. */
4444 check_find_bounds_finds (mapped_index_base
&index
,
4445 const char *search_name
,
4446 gdb::array_view
<const char *> expected_syms
,
4447 dwarf2_per_objfile
*per_objfile
)
4449 lookup_name_info
lookup_name (search_name
,
4450 symbol_name_match_type::FULL
, true);
4452 auto bounds
= index
.find_name_components_bounds (lookup_name
,
4456 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4457 if (distance
!= expected_syms
.size ())
4460 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4462 auto nc_elem
= bounds
.first
+ exp_elem
;
4463 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
, per_objfile
);
4464 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4471 /* Test the lower-level mapped_index::find_name_component_bounds
4475 test_mapped_index_find_name_component_bounds ()
4477 mock_mapped_index
mock_index (test_symbols
);
4479 mock_index
.build_name_components (NULL
/* per_objfile */);
4481 /* Test the lower-level mapped_index::find_name_component_bounds
4482 method in completion mode. */
4484 static const char *expected_syms
[] = {
4489 SELF_CHECK (check_find_bounds_finds
4490 (mock_index
, "t1_func", expected_syms
,
4491 NULL
/* per_objfile */));
4494 /* Check that the increment-last-char in the name matching algorithm
4495 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4497 static const char *expected_syms1
[] = {
4501 SELF_CHECK (check_find_bounds_finds
4502 (mock_index
, "\377", expected_syms1
, NULL
/* per_objfile */));
4504 static const char *expected_syms2
[] = {
4507 SELF_CHECK (check_find_bounds_finds
4508 (mock_index
, "\377\377", expected_syms2
,
4509 NULL
/* per_objfile */));
4513 /* Test dw2_expand_symtabs_matching_symbol. */
4516 test_dw2_expand_symtabs_matching_symbol ()
4518 mock_mapped_index
mock_index (test_symbols
);
4520 /* We let all tests run until the end even if some fails, for debug
4522 bool any_mismatch
= false;
4524 /* Create the expected symbols list (an initializer_list). Needed
4525 because lists have commas, and we need to pass them to CHECK,
4526 which is a macro. */
4527 #define EXPECT(...) { __VA_ARGS__ }
4529 /* Wrapper for check_match that passes down the current
4530 __FILE__/__LINE__. */
4531 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4532 any_mismatch |= !check_match (__FILE__, __LINE__, \
4534 NAME, MATCH_TYPE, COMPLETION_MODE, \
4535 EXPECTED_LIST, NULL)
4537 /* Identity checks. */
4538 for (const char *sym
: test_symbols
)
4540 /* Should be able to match all existing symbols. */
4541 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4544 /* Should be able to match all existing symbols with
4546 std::string with_params
= std::string (sym
) + "(int)";
4547 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4550 /* Should be able to match all existing symbols with
4551 parameters and qualifiers. */
4552 with_params
= std::string (sym
) + " ( int ) const";
4553 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4556 /* This should really find sym, but cp-name-parser.y doesn't
4557 know about lvalue/rvalue qualifiers yet. */
4558 with_params
= std::string (sym
) + " ( int ) &&";
4559 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4563 /* Check that the name matching algorithm for completion doesn't get
4564 confused with Latin1 'ÿ' / 0xff. */
4566 static const char str
[] = "\377";
4567 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4568 EXPECT ("\377", "\377\377123"));
4571 /* Check that the increment-last-char in the matching algorithm for
4572 completion doesn't match "t1_fund" when completing "t1_func". */
4574 static const char str
[] = "t1_func";
4575 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4576 EXPECT ("t1_func", "t1_func1"));
4579 /* Check that completion mode works at each prefix of the expected
4582 static const char str
[] = "function(int)";
4583 size_t len
= strlen (str
);
4586 for (size_t i
= 1; i
< len
; i
++)
4588 lookup
.assign (str
, i
);
4589 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4590 EXPECT ("function"));
4594 /* While "w" is a prefix of both components, the match function
4595 should still only be called once. */
4597 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4599 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4603 /* Same, with a "complicated" symbol. */
4605 static const char str
[] = Z_SYM_NAME
;
4606 size_t len
= strlen (str
);
4609 for (size_t i
= 1; i
< len
; i
++)
4611 lookup
.assign (str
, i
);
4612 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4613 EXPECT (Z_SYM_NAME
));
4617 /* In FULL mode, an incomplete symbol doesn't match. */
4619 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4623 /* A complete symbol with parameters matches any overload, since the
4624 index has no overload info. */
4626 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4627 EXPECT ("std::zfunction", "std::zfunction2"));
4628 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4629 EXPECT ("std::zfunction", "std::zfunction2"));
4630 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4631 EXPECT ("std::zfunction", "std::zfunction2"));
4634 /* Check that whitespace is ignored appropriately. A symbol with a
4635 template argument list. */
4637 static const char expected
[] = "ns::foo<int>";
4638 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4640 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4644 /* Check that whitespace is ignored appropriately. A symbol with a
4645 template argument list that includes a pointer. */
4647 static const char expected
[] = "ns::foo<char*>";
4648 /* Try both completion and non-completion modes. */
4649 static const bool completion_mode
[2] = {false, true};
4650 for (size_t i
= 0; i
< 2; i
++)
4652 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4653 completion_mode
[i
], EXPECT (expected
));
4654 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4655 completion_mode
[i
], EXPECT (expected
));
4657 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4658 completion_mode
[i
], EXPECT (expected
));
4659 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4660 completion_mode
[i
], EXPECT (expected
));
4665 /* Check method qualifiers are ignored. */
4666 static const char expected
[] = "ns::foo<char*>";
4667 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4668 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4669 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4670 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4671 CHECK_MATCH ("foo < char * > ( int ) const",
4672 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4673 CHECK_MATCH ("foo < char * > ( int ) &&",
4674 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4677 /* Test lookup names that don't match anything. */
4679 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4682 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4686 /* Some wild matching tests, exercising "(anonymous namespace)",
4687 which should not be confused with a parameter list. */
4689 static const char *syms
[] = {
4693 "A :: B :: C ( int )",
4698 for (const char *s
: syms
)
4700 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4701 EXPECT ("(anonymous namespace)::A::B::C"));
4706 static const char expected
[] = "ns2::tmpl<int>::foo2";
4707 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4709 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4713 SELF_CHECK (!any_mismatch
);
4722 test_mapped_index_find_name_component_bounds ();
4723 test_dw2_expand_symtabs_matching_symbol ();
4726 }} // namespace selftests::dw2_expand_symtabs_matching
4728 #endif /* GDB_SELF_TEST */
4730 /* If FILE_MATCHER is NULL or if PER_CU has
4731 dwarf2_per_cu_quick_data::MARK set (see
4732 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4733 EXPANSION_NOTIFY on it. */
4736 dw2_expand_symtabs_matching_one
4737 (dwarf2_per_cu_data
*per_cu
,
4738 dwarf2_per_objfile
*per_objfile
,
4739 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4740 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4742 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4744 bool symtab_was_null
= !per_objfile
->symtab_set_p (per_cu
);
4746 compunit_symtab
*symtab
4747 = dw2_instantiate_symtab (per_cu
, per_objfile
, false);
4748 gdb_assert (symtab
!= nullptr);
4750 if (expansion_notify
!= NULL
&& symtab_was_null
)
4751 expansion_notify (symtab
);
4755 /* Helper for dw2_expand_matching symtabs. Called on each symbol
4756 matched, to expand corresponding CUs that were marked. IDX is the
4757 index of the symbol name that matched. */
4760 dw2_expand_marked_cus
4761 (dwarf2_per_objfile
*per_objfile
, offset_type idx
,
4762 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4763 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4766 offset_type
*vec
, vec_len
, vec_idx
;
4767 bool global_seen
= false;
4768 mapped_index
&index
= *per_objfile
->per_bfd
->index_table
;
4770 vec
= (offset_type
*) (index
.constant_pool
4771 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
4772 vec_len
= MAYBE_SWAP (vec
[0]);
4773 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
4775 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4776 /* This value is only valid for index versions >= 7. */
4777 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4778 gdb_index_symbol_kind symbol_kind
=
4779 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4780 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4781 /* Only check the symbol attributes if they're present.
4782 Indices prior to version 7 don't record them,
4783 and indices >= 7 may elide them for certain symbols
4784 (gold does this). */
4787 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4789 /* Work around gold/15646. */
4792 && symbol_kind
== GDB_INDEX_SYMBOL_KIND_TYPE
)
4800 /* Only check the symbol's kind if it has one. */
4805 case VARIABLES_DOMAIN
:
4806 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4809 case FUNCTIONS_DOMAIN
:
4810 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4814 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4817 case MODULES_DOMAIN
:
4818 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4826 /* Don't crash on bad data. */
4827 if (cu_index
>= (per_objfile
->per_bfd
->all_comp_units
.size ()
4828 + per_objfile
->per_bfd
->all_type_units
.size ()))
4830 complaint (_(".gdb_index entry has bad CU index"
4831 " [in module %s]"), objfile_name (per_objfile
->objfile
));
4835 dwarf2_per_cu_data
*per_cu
= per_objfile
->per_bfd
->get_cutu (cu_index
);
4836 dw2_expand_symtabs_matching_one (per_cu
, per_objfile
, file_matcher
,
4841 /* If FILE_MATCHER is non-NULL, set all the
4842 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
4843 that match FILE_MATCHER. */
4846 dw_expand_symtabs_matching_file_matcher
4847 (dwarf2_per_objfile
*per_objfile
,
4848 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
4850 if (file_matcher
== NULL
)
4853 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
4855 NULL
, xcalloc
, xfree
));
4856 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
4858 NULL
, xcalloc
, xfree
));
4860 /* The rule is CUs specify all the files, including those used by
4861 any TU, so there's no need to scan TUs here. */
4863 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
4867 per_cu
->v
.quick
->mark
= 0;
4869 /* We only need to look at symtabs not already expanded. */
4870 if (per_objfile
->symtab_set_p (per_cu
))
4873 quick_file_names
*file_data
= dw2_get_file_names (per_cu
, per_objfile
);
4874 if (file_data
== NULL
)
4877 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
4879 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
4881 per_cu
->v
.quick
->mark
= 1;
4885 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4887 const char *this_real_name
;
4889 if (file_matcher (file_data
->file_names
[j
], false))
4891 per_cu
->v
.quick
->mark
= 1;
4895 /* Before we invoke realpath, which can get expensive when many
4896 files are involved, do a quick comparison of the basenames. */
4897 if (!basenames_may_differ
4898 && !file_matcher (lbasename (file_data
->file_names
[j
]),
4902 this_real_name
= dw2_get_real_path (per_objfile
, file_data
, j
);
4903 if (file_matcher (this_real_name
, false))
4905 per_cu
->v
.quick
->mark
= 1;
4910 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
4911 ? visited_found
.get ()
4912 : visited_not_found
.get (),
4919 dw2_expand_symtabs_matching
4920 (struct objfile
*objfile
,
4921 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4922 const lookup_name_info
*lookup_name
,
4923 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4924 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4925 enum search_domain kind
)
4927 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
4929 /* index_table is NULL if OBJF_READNOW. */
4930 if (!per_objfile
->per_bfd
->index_table
)
4933 dw_expand_symtabs_matching_file_matcher (per_objfile
, file_matcher
);
4935 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
4937 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
4941 dw2_expand_symtabs_matching_one (per_cu
, per_objfile
,
4942 file_matcher
, expansion_notify
);
4947 mapped_index
&index
= *per_objfile
->per_bfd
->index_table
;
4949 dw2_expand_symtabs_matching_symbol (index
, *lookup_name
,
4951 kind
, [&] (offset_type idx
)
4953 dw2_expand_marked_cus (per_objfile
, idx
, file_matcher
, expansion_notify
,
4959 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4962 static struct compunit_symtab
*
4963 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4968 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4969 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4972 if (cust
->includes
== NULL
)
4975 for (i
= 0; cust
->includes
[i
]; ++i
)
4977 struct compunit_symtab
*s
= cust
->includes
[i
];
4979 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4987 static struct compunit_symtab
*
4988 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4989 struct bound_minimal_symbol msymbol
,
4991 struct obj_section
*section
,
4994 struct dwarf2_per_cu_data
*data
;
4995 struct compunit_symtab
*result
;
4997 if (!objfile
->partial_symtabs
->psymtabs_addrmap
)
5000 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
5001 data
= (struct dwarf2_per_cu_data
*) addrmap_find
5002 (objfile
->partial_symtabs
->psymtabs_addrmap
, pc
- baseaddr
);
5006 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
5007 if (warn_if_readin
&& per_objfile
->symtab_set_p (data
))
5008 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
5009 paddress (objfile
->arch (), pc
));
5011 result
= recursively_find_pc_sect_compunit_symtab
5012 (dw2_instantiate_symtab (data
, per_objfile
, false), pc
);
5014 gdb_assert (result
!= NULL
);
5019 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
5020 void *data
, int need_fullname
)
5022 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
5024 if (!per_objfile
->per_bfd
->filenames_cache
)
5026 per_objfile
->per_bfd
->filenames_cache
.emplace ();
5028 htab_up
visited (htab_create_alloc (10,
5029 htab_hash_pointer
, htab_eq_pointer
,
5030 NULL
, xcalloc
, xfree
));
5032 /* The rule is CUs specify all the files, including those used
5033 by any TU, so there's no need to scan TUs here. We can
5034 ignore file names coming from already-expanded CUs. */
5036 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
5038 if (per_objfile
->symtab_set_p (per_cu
))
5040 void **slot
= htab_find_slot (visited
.get (),
5041 per_cu
->v
.quick
->file_names
,
5044 *slot
= per_cu
->v
.quick
->file_names
;
5048 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
5050 /* We only need to look at symtabs not already expanded. */
5051 if (per_objfile
->symtab_set_p (per_cu
))
5054 quick_file_names
*file_data
5055 = dw2_get_file_names (per_cu
, per_objfile
);
5056 if (file_data
== NULL
)
5059 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
5062 /* Already visited. */
5067 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5069 const char *filename
= file_data
->file_names
[j
];
5070 per_objfile
->per_bfd
->filenames_cache
->seen (filename
);
5075 per_objfile
->per_bfd
->filenames_cache
->traverse ([&] (const char *filename
)
5077 gdb::unique_xmalloc_ptr
<char> this_real_name
;
5080 this_real_name
= gdb_realpath (filename
);
5081 (*fun
) (filename
, this_real_name
.get (), data
);
5086 dw2_has_symbols (struct objfile
*objfile
)
5091 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
5094 dw2_find_last_source_symtab
,
5095 dw2_forget_cached_source_info
,
5096 dw2_map_symtabs_matching_filename
,
5101 dw2_expand_symtabs_for_function
,
5102 dw2_expand_all_symtabs
,
5103 dw2_expand_symtabs_with_fullname
,
5104 dw2_map_matching_symbols
,
5105 dw2_expand_symtabs_matching
,
5106 dw2_find_pc_sect_compunit_symtab
,
5108 dw2_map_symbol_filenames
5111 /* DWARF-5 debug_names reader. */
5113 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
5114 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
5116 /* A helper function that reads the .debug_names section in SECTION
5117 and fills in MAP. FILENAME is the name of the file containing the
5118 section; it is used for error reporting.
5120 Returns true if all went well, false otherwise. */
5123 read_debug_names_from_section (struct objfile
*objfile
,
5124 const char *filename
,
5125 struct dwarf2_section_info
*section
,
5126 mapped_debug_names
&map
)
5128 if (section
->empty ())
5131 /* Older elfutils strip versions could keep the section in the main
5132 executable while splitting it for the separate debug info file. */
5133 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
5136 section
->read (objfile
);
5138 map
.dwarf5_byte_order
= gdbarch_byte_order (objfile
->arch ());
5140 const gdb_byte
*addr
= section
->buffer
;
5142 bfd
*const abfd
= section
->get_bfd_owner ();
5144 unsigned int bytes_read
;
5145 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
5148 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
5149 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
5150 if (bytes_read
+ length
!= section
->size
)
5152 /* There may be multiple per-CU indices. */
5153 warning (_("Section .debug_names in %s length %s does not match "
5154 "section length %s, ignoring .debug_names."),
5155 filename
, plongest (bytes_read
+ length
),
5156 pulongest (section
->size
));
5160 /* The version number. */
5161 uint16_t version
= read_2_bytes (abfd
, addr
);
5165 warning (_("Section .debug_names in %s has unsupported version %d, "
5166 "ignoring .debug_names."),
5172 uint16_t padding
= read_2_bytes (abfd
, addr
);
5176 warning (_("Section .debug_names in %s has unsupported padding %d, "
5177 "ignoring .debug_names."),
5182 /* comp_unit_count - The number of CUs in the CU list. */
5183 map
.cu_count
= read_4_bytes (abfd
, addr
);
5186 /* local_type_unit_count - The number of TUs in the local TU
5188 map
.tu_count
= read_4_bytes (abfd
, addr
);
5191 /* foreign_type_unit_count - The number of TUs in the foreign TU
5193 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
5195 if (foreign_tu_count
!= 0)
5197 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
5198 "ignoring .debug_names."),
5199 filename
, static_cast<unsigned long> (foreign_tu_count
));
5203 /* bucket_count - The number of hash buckets in the hash lookup
5205 map
.bucket_count
= read_4_bytes (abfd
, addr
);
5208 /* name_count - The number of unique names in the index. */
5209 map
.name_count
= read_4_bytes (abfd
, addr
);
5212 /* abbrev_table_size - The size in bytes of the abbreviations
5214 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
5217 /* augmentation_string_size - The size in bytes of the augmentation
5218 string. This value is rounded up to a multiple of 4. */
5219 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
5221 map
.augmentation_is_gdb
= ((augmentation_string_size
5222 == sizeof (dwarf5_augmentation
))
5223 && memcmp (addr
, dwarf5_augmentation
,
5224 sizeof (dwarf5_augmentation
)) == 0);
5225 augmentation_string_size
+= (-augmentation_string_size
) & 3;
5226 addr
+= augmentation_string_size
;
5229 map
.cu_table_reordered
= addr
;
5230 addr
+= map
.cu_count
* map
.offset_size
;
5232 /* List of Local TUs */
5233 map
.tu_table_reordered
= addr
;
5234 addr
+= map
.tu_count
* map
.offset_size
;
5236 /* Hash Lookup Table */
5237 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5238 addr
+= map
.bucket_count
* 4;
5239 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5240 addr
+= map
.name_count
* 4;
5243 map
.name_table_string_offs_reordered
= addr
;
5244 addr
+= map
.name_count
* map
.offset_size
;
5245 map
.name_table_entry_offs_reordered
= addr
;
5246 addr
+= map
.name_count
* map
.offset_size
;
5248 const gdb_byte
*abbrev_table_start
= addr
;
5251 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5256 const auto insertpair
5257 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5258 if (!insertpair
.second
)
5260 warning (_("Section .debug_names in %s has duplicate index %s, "
5261 "ignoring .debug_names."),
5262 filename
, pulongest (index_num
));
5265 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5266 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5271 mapped_debug_names::index_val::attr attr
;
5272 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5274 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5276 if (attr
.form
== DW_FORM_implicit_const
)
5278 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5282 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5284 indexval
.attr_vec
.push_back (std::move (attr
));
5287 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5289 warning (_("Section .debug_names in %s has abbreviation_table "
5290 "of size %s vs. written as %u, ignoring .debug_names."),
5291 filename
, plongest (addr
- abbrev_table_start
),
5295 map
.entry_pool
= addr
;
5300 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5304 create_cus_from_debug_names_list (dwarf2_per_bfd
*per_bfd
,
5305 const mapped_debug_names
&map
,
5306 dwarf2_section_info
§ion
,
5309 if (!map
.augmentation_is_gdb
)
5311 for (uint32_t i
= 0; i
< map
.cu_count
; ++i
)
5313 sect_offset sect_off
5314 = (sect_offset
) (extract_unsigned_integer
5315 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5317 map
.dwarf5_byte_order
));
5318 /* We don't know the length of the CU, because the CU list in a
5319 .debug_names index can be incomplete, so we can't use the start of
5320 the next CU as end of this CU. We create the CUs here with length 0,
5321 and in cutu_reader::cutu_reader we'll fill in the actual length. */
5322 dwarf2_per_cu_data
*per_cu
5323 = create_cu_from_index_list (per_bfd
, §ion
, is_dwz
, sect_off
, 0);
5324 per_bfd
->all_comp_units
.push_back (per_cu
);
5328 sect_offset sect_off_prev
;
5329 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5331 sect_offset sect_off_next
;
5332 if (i
< map
.cu_count
)
5335 = (sect_offset
) (extract_unsigned_integer
5336 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5338 map
.dwarf5_byte_order
));
5341 sect_off_next
= (sect_offset
) section
.size
;
5344 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5345 dwarf2_per_cu_data
*per_cu
5346 = create_cu_from_index_list (per_bfd
, §ion
, is_dwz
,
5347 sect_off_prev
, length
);
5348 per_bfd
->all_comp_units
.push_back (per_cu
);
5350 sect_off_prev
= sect_off_next
;
5354 /* Read the CU list from the mapped index, and use it to create all
5355 the CU objects for this dwarf2_per_objfile. */
5358 create_cus_from_debug_names (dwarf2_per_bfd
*per_bfd
,
5359 const mapped_debug_names
&map
,
5360 const mapped_debug_names
&dwz_map
)
5362 gdb_assert (per_bfd
->all_comp_units
.empty ());
5363 per_bfd
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5365 create_cus_from_debug_names_list (per_bfd
, map
, per_bfd
->info
,
5366 false /* is_dwz */);
5368 if (dwz_map
.cu_count
== 0)
5371 dwz_file
*dwz
= dwarf2_get_dwz_file (per_bfd
);
5372 create_cus_from_debug_names_list (per_bfd
, dwz_map
, dwz
->info
,
5376 /* Read .debug_names. If everything went ok, initialize the "quick"
5377 elements of all the CUs and return true. Otherwise, return false. */
5380 dwarf2_read_debug_names (dwarf2_per_objfile
*per_objfile
)
5382 std::unique_ptr
<mapped_debug_names
> map (new mapped_debug_names
);
5383 mapped_debug_names dwz_map
;
5384 struct objfile
*objfile
= per_objfile
->objfile
;
5385 dwarf2_per_bfd
*per_bfd
= per_objfile
->per_bfd
;
5387 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5388 &per_objfile
->per_bfd
->debug_names
, *map
))
5391 /* Don't use the index if it's empty. */
5392 if (map
->name_count
== 0)
5395 /* If there is a .dwz file, read it so we can get its CU list as
5397 dwz_file
*dwz
= dwarf2_get_dwz_file (per_bfd
);
5400 if (!read_debug_names_from_section (objfile
,
5401 bfd_get_filename (dwz
->dwz_bfd
.get ()),
5402 &dwz
->debug_names
, dwz_map
))
5404 warning (_("could not read '.debug_names' section from %s; skipping"),
5405 bfd_get_filename (dwz
->dwz_bfd
.get ()));
5410 create_cus_from_debug_names (per_bfd
, *map
, dwz_map
);
5412 if (map
->tu_count
!= 0)
5414 /* We can only handle a single .debug_types when we have an
5416 if (per_bfd
->types
.size () != 1)
5419 dwarf2_section_info
*section
= &per_bfd
->types
[0];
5421 create_signatured_type_table_from_debug_names
5422 (per_objfile
, *map
, section
, &per_bfd
->abbrev
);
5425 create_addrmap_from_aranges (per_objfile
, &per_bfd
->debug_aranges
);
5427 per_bfd
->debug_names_table
= std::move (map
);
5428 per_bfd
->using_index
= 1;
5429 per_bfd
->quick_file_names_table
=
5430 create_quick_file_names_table (per_objfile
->per_bfd
->all_comp_units
.size ());
5432 /* Save partial symtabs in the per_bfd object, for the benefit of subsequent
5433 objfiles using the same BFD. */
5434 gdb_assert (per_bfd
->partial_symtabs
== nullptr);
5435 per_bfd
->partial_symtabs
= objfile
->partial_symtabs
;
5440 /* Type used to manage iterating over all CUs looking for a symbol for
5443 class dw2_debug_names_iterator
5446 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5447 gdb::optional
<block_enum
> block_index
,
5449 const char *name
, dwarf2_per_objfile
*per_objfile
)
5450 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5451 m_addr (find_vec_in_debug_names (map
, name
, per_objfile
)),
5452 m_per_objfile (per_objfile
)
5455 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5456 search_domain search
, uint32_t namei
, dwarf2_per_objfile
*per_objfile
)
5459 m_addr (find_vec_in_debug_names (map
, namei
, per_objfile
)),
5460 m_per_objfile (per_objfile
)
5463 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5464 block_enum block_index
, domain_enum domain
,
5465 uint32_t namei
, dwarf2_per_objfile
*per_objfile
)
5466 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5467 m_addr (find_vec_in_debug_names (map
, namei
, per_objfile
)),
5468 m_per_objfile (per_objfile
)
5471 /* Return the next matching CU or NULL if there are no more. */
5472 dwarf2_per_cu_data
*next ();
5475 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5477 dwarf2_per_objfile
*per_objfile
);
5478 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5480 dwarf2_per_objfile
*per_objfile
);
5482 /* The internalized form of .debug_names. */
5483 const mapped_debug_names
&m_map
;
5485 /* If set, only look for symbols that match that block. Valid values are
5486 GLOBAL_BLOCK and STATIC_BLOCK. */
5487 const gdb::optional
<block_enum
> m_block_index
;
5489 /* The kind of symbol we're looking for. */
5490 const domain_enum m_domain
= UNDEF_DOMAIN
;
5491 const search_domain m_search
= ALL_DOMAIN
;
5493 /* The list of CUs from the index entry of the symbol, or NULL if
5495 const gdb_byte
*m_addr
;
5497 dwarf2_per_objfile
*m_per_objfile
;
5501 mapped_debug_names::namei_to_name
5502 (uint32_t namei
, dwarf2_per_objfile
*per_objfile
) const
5504 const ULONGEST namei_string_offs
5505 = extract_unsigned_integer ((name_table_string_offs_reordered
5506 + namei
* offset_size
),
5509 return read_indirect_string_at_offset (per_objfile
, namei_string_offs
);
5512 /* Find a slot in .debug_names for the object named NAME. If NAME is
5513 found, return pointer to its pool data. If NAME cannot be found,
5517 dw2_debug_names_iterator::find_vec_in_debug_names
5518 (const mapped_debug_names
&map
, const char *name
,
5519 dwarf2_per_objfile
*per_objfile
)
5521 int (*cmp
) (const char *, const char *);
5523 gdb::unique_xmalloc_ptr
<char> without_params
;
5524 if (current_language
->la_language
== language_cplus
5525 || current_language
->la_language
== language_fortran
5526 || current_language
->la_language
== language_d
)
5528 /* NAME is already canonical. Drop any qualifiers as
5529 .debug_names does not contain any. */
5531 if (strchr (name
, '(') != NULL
)
5533 without_params
= cp_remove_params (name
);
5534 if (without_params
!= NULL
)
5535 name
= without_params
.get ();
5539 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5541 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5543 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5544 (map
.bucket_table_reordered
5545 + (full_hash
% map
.bucket_count
)), 4,
5546 map
.dwarf5_byte_order
);
5550 if (namei
>= map
.name_count
)
5552 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5554 namei
, map
.name_count
,
5555 objfile_name (per_objfile
->objfile
));
5561 const uint32_t namei_full_hash
5562 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5563 (map
.hash_table_reordered
+ namei
), 4,
5564 map
.dwarf5_byte_order
);
5565 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5568 if (full_hash
== namei_full_hash
)
5570 const char *const namei_string
= map
.namei_to_name (namei
, per_objfile
);
5572 #if 0 /* An expensive sanity check. */
5573 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5575 complaint (_("Wrong .debug_names hash for string at index %u "
5577 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5582 if (cmp (namei_string
, name
) == 0)
5584 const ULONGEST namei_entry_offs
5585 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5586 + namei
* map
.offset_size
),
5587 map
.offset_size
, map
.dwarf5_byte_order
);
5588 return map
.entry_pool
+ namei_entry_offs
;
5593 if (namei
>= map
.name_count
)
5599 dw2_debug_names_iterator::find_vec_in_debug_names
5600 (const mapped_debug_names
&map
, uint32_t namei
, dwarf2_per_objfile
*per_objfile
)
5602 if (namei
>= map
.name_count
)
5604 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5606 namei
, map
.name_count
,
5607 objfile_name (per_objfile
->objfile
));
5611 const ULONGEST namei_entry_offs
5612 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5613 + namei
* map
.offset_size
),
5614 map
.offset_size
, map
.dwarf5_byte_order
);
5615 return map
.entry_pool
+ namei_entry_offs
;
5618 /* See dw2_debug_names_iterator. */
5620 dwarf2_per_cu_data
*
5621 dw2_debug_names_iterator::next ()
5626 dwarf2_per_bfd
*per_bfd
= m_per_objfile
->per_bfd
;
5627 struct objfile
*objfile
= m_per_objfile
->objfile
;
5628 bfd
*const abfd
= objfile
->obfd
;
5632 unsigned int bytes_read
;
5633 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5634 m_addr
+= bytes_read
;
5638 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5639 if (indexval_it
== m_map
.abbrev_map
.cend ())
5641 complaint (_("Wrong .debug_names undefined abbrev code %s "
5643 pulongest (abbrev
), objfile_name (objfile
));
5646 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5647 enum class symbol_linkage
{
5651 } symbol_linkage_
= symbol_linkage::unknown
;
5652 dwarf2_per_cu_data
*per_cu
= NULL
;
5653 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5658 case DW_FORM_implicit_const
:
5659 ull
= attr
.implicit_const
;
5661 case DW_FORM_flag_present
:
5665 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5666 m_addr
+= bytes_read
;
5669 ull
= read_4_bytes (abfd
, m_addr
);
5673 ull
= read_8_bytes (abfd
, m_addr
);
5676 case DW_FORM_ref_sig8
:
5677 ull
= read_8_bytes (abfd
, m_addr
);
5681 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5682 dwarf_form_name (attr
.form
),
5683 objfile_name (objfile
));
5686 switch (attr
.dw_idx
)
5688 case DW_IDX_compile_unit
:
5689 /* Don't crash on bad data. */
5690 if (ull
>= m_per_objfile
->per_bfd
->all_comp_units
.size ())
5692 complaint (_(".debug_names entry has bad CU index %s"
5695 objfile_name (objfile
));
5698 per_cu
= per_bfd
->get_cutu (ull
);
5700 case DW_IDX_type_unit
:
5701 /* Don't crash on bad data. */
5702 if (ull
>= per_bfd
->all_type_units
.size ())
5704 complaint (_(".debug_names entry has bad TU index %s"
5707 objfile_name (objfile
));
5710 per_cu
= &per_bfd
->get_tu (ull
)->per_cu
;
5712 case DW_IDX_die_offset
:
5713 /* In a per-CU index (as opposed to a per-module index), index
5714 entries without CU attribute implicitly refer to the single CU. */
5716 per_cu
= per_bfd
->get_cu (0);
5718 case DW_IDX_GNU_internal
:
5719 if (!m_map
.augmentation_is_gdb
)
5721 symbol_linkage_
= symbol_linkage::static_
;
5723 case DW_IDX_GNU_external
:
5724 if (!m_map
.augmentation_is_gdb
)
5726 symbol_linkage_
= symbol_linkage::extern_
;
5731 /* Skip if already read in. */
5732 if (m_per_objfile
->symtab_set_p (per_cu
))
5735 /* Check static vs global. */
5736 if (symbol_linkage_
!= symbol_linkage::unknown
&& m_block_index
.has_value ())
5738 const bool want_static
= *m_block_index
== STATIC_BLOCK
;
5739 const bool symbol_is_static
=
5740 symbol_linkage_
== symbol_linkage::static_
;
5741 if (want_static
!= symbol_is_static
)
5745 /* Match dw2_symtab_iter_next, symbol_kind
5746 and debug_names::psymbol_tag. */
5750 switch (indexval
.dwarf_tag
)
5752 case DW_TAG_variable
:
5753 case DW_TAG_subprogram
:
5754 /* Some types are also in VAR_DOMAIN. */
5755 case DW_TAG_typedef
:
5756 case DW_TAG_structure_type
:
5763 switch (indexval
.dwarf_tag
)
5765 case DW_TAG_typedef
:
5766 case DW_TAG_structure_type
:
5773 switch (indexval
.dwarf_tag
)
5776 case DW_TAG_variable
:
5783 switch (indexval
.dwarf_tag
)
5795 /* Match dw2_expand_symtabs_matching, symbol_kind and
5796 debug_names::psymbol_tag. */
5799 case VARIABLES_DOMAIN
:
5800 switch (indexval
.dwarf_tag
)
5802 case DW_TAG_variable
:
5808 case FUNCTIONS_DOMAIN
:
5809 switch (indexval
.dwarf_tag
)
5811 case DW_TAG_subprogram
:
5818 switch (indexval
.dwarf_tag
)
5820 case DW_TAG_typedef
:
5821 case DW_TAG_structure_type
:
5827 case MODULES_DOMAIN
:
5828 switch (indexval
.dwarf_tag
)
5842 static struct compunit_symtab
*
5843 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
5844 const char *name
, domain_enum domain
)
5846 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
5848 const auto &mapp
= per_objfile
->per_bfd
->debug_names_table
;
5851 /* index is NULL if OBJF_READNOW. */
5854 const auto &map
= *mapp
;
5856 dw2_debug_names_iterator
iter (map
, block_index
, domain
, name
, per_objfile
);
5858 struct compunit_symtab
*stab_best
= NULL
;
5859 struct dwarf2_per_cu_data
*per_cu
;
5860 while ((per_cu
= iter
.next ()) != NULL
)
5862 struct symbol
*sym
, *with_opaque
= NULL
;
5863 compunit_symtab
*stab
5864 = dw2_instantiate_symtab (per_cu
, per_objfile
, false);
5865 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
5866 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
5868 sym
= block_find_symbol (block
, name
, domain
,
5869 block_find_non_opaque_type_preferred
,
5872 /* Some caution must be observed with overloaded functions and
5873 methods, since the index will not contain any overload
5874 information (but NAME might contain it). */
5877 && strcmp_iw (sym
->search_name (), name
) == 0)
5879 if (with_opaque
!= NULL
5880 && strcmp_iw (with_opaque
->search_name (), name
) == 0)
5883 /* Keep looking through other CUs. */
5889 /* This dumps minimal information about .debug_names. It is called
5890 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
5891 uses this to verify that .debug_names has been loaded. */
5894 dw2_debug_names_dump (struct objfile
*objfile
)
5896 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
5898 gdb_assert (per_objfile
->per_bfd
->using_index
);
5899 printf_filtered (".debug_names:");
5900 if (per_objfile
->per_bfd
->debug_names_table
)
5901 printf_filtered (" exists\n");
5903 printf_filtered (" faked for \"readnow\"\n");
5904 printf_filtered ("\n");
5908 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
5909 const char *func_name
)
5911 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
5913 /* per_objfile->per_bfd->debug_names_table is NULL if OBJF_READNOW. */
5914 if (per_objfile
->per_bfd
->debug_names_table
)
5916 const mapped_debug_names
&map
= *per_objfile
->per_bfd
->debug_names_table
;
5918 dw2_debug_names_iterator
iter (map
, {}, VAR_DOMAIN
, func_name
,
5921 struct dwarf2_per_cu_data
*per_cu
;
5922 while ((per_cu
= iter
.next ()) != NULL
)
5923 dw2_instantiate_symtab (per_cu
, per_objfile
, false);
5928 dw2_debug_names_map_matching_symbols
5929 (struct objfile
*objfile
,
5930 const lookup_name_info
&name
, domain_enum domain
,
5932 gdb::function_view
<symbol_found_callback_ftype
> callback
,
5933 symbol_compare_ftype
*ordered_compare
)
5935 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
5937 /* debug_names_table is NULL if OBJF_READNOW. */
5938 if (!per_objfile
->per_bfd
->debug_names_table
)
5941 mapped_debug_names
&map
= *per_objfile
->per_bfd
->debug_names_table
;
5942 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
5944 const char *match_name
= name
.ada ().lookup_name ().c_str ();
5945 auto matcher
= [&] (const char *symname
)
5947 if (ordered_compare
== nullptr)
5949 return ordered_compare (symname
, match_name
) == 0;
5952 dw2_expand_symtabs_matching_symbol (map
, name
, matcher
, ALL_DOMAIN
,
5953 [&] (offset_type namei
)
5955 /* The name was matched, now expand corresponding CUs that were
5957 dw2_debug_names_iterator
iter (map
, block_kind
, domain
, namei
,
5960 struct dwarf2_per_cu_data
*per_cu
;
5961 while ((per_cu
= iter
.next ()) != NULL
)
5962 dw2_expand_symtabs_matching_one (per_cu
, per_objfile
, nullptr,
5967 /* It's a shame we couldn't do this inside the
5968 dw2_expand_symtabs_matching_symbol callback, but that skips CUs
5969 that have already been expanded. Instead, this loop matches what
5970 the psymtab code does. */
5971 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
5973 compunit_symtab
*symtab
= per_objfile
->get_symtab (per_cu
);
5974 if (symtab
!= nullptr)
5976 const struct block
*block
5977 = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (symtab
), block_kind
);
5978 if (!iterate_over_symbols_terminated (block
, name
,
5986 dw2_debug_names_expand_symtabs_matching
5987 (struct objfile
*objfile
,
5988 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5989 const lookup_name_info
*lookup_name
,
5990 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5991 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5992 enum search_domain kind
)
5994 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
5996 /* debug_names_table is NULL if OBJF_READNOW. */
5997 if (!per_objfile
->per_bfd
->debug_names_table
)
6000 dw_expand_symtabs_matching_file_matcher (per_objfile
, file_matcher
);
6002 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
6004 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
6008 dw2_expand_symtabs_matching_one (per_cu
, per_objfile
, file_matcher
,
6014 mapped_debug_names
&map
= *per_objfile
->per_bfd
->debug_names_table
;
6016 dw2_expand_symtabs_matching_symbol (map
, *lookup_name
,
6018 kind
, [&] (offset_type namei
)
6020 /* The name was matched, now expand corresponding CUs that were
6022 dw2_debug_names_iterator
iter (map
, kind
, namei
, per_objfile
);
6024 struct dwarf2_per_cu_data
*per_cu
;
6025 while ((per_cu
= iter
.next ()) != NULL
)
6026 dw2_expand_symtabs_matching_one (per_cu
, per_objfile
, file_matcher
,
6032 const struct quick_symbol_functions dwarf2_debug_names_functions
=
6035 dw2_find_last_source_symtab
,
6036 dw2_forget_cached_source_info
,
6037 dw2_map_symtabs_matching_filename
,
6038 dw2_debug_names_lookup_symbol
,
6041 dw2_debug_names_dump
,
6042 dw2_debug_names_expand_symtabs_for_function
,
6043 dw2_expand_all_symtabs
,
6044 dw2_expand_symtabs_with_fullname
,
6045 dw2_debug_names_map_matching_symbols
,
6046 dw2_debug_names_expand_symtabs_matching
,
6047 dw2_find_pc_sect_compunit_symtab
,
6049 dw2_map_symbol_filenames
6052 /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
6053 to either a dwarf2_per_bfd or dwz_file object. */
6055 template <typename T
>
6056 static gdb::array_view
<const gdb_byte
>
6057 get_gdb_index_contents_from_section (objfile
*obj
, T
*section_owner
)
6059 dwarf2_section_info
*section
= §ion_owner
->gdb_index
;
6061 if (section
->empty ())
6064 /* Older elfutils strip versions could keep the section in the main
6065 executable while splitting it for the separate debug info file. */
6066 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
6069 section
->read (obj
);
6071 /* dwarf2_section_info::size is a bfd_size_type, while
6072 gdb::array_view works with size_t. On 32-bit hosts, with
6073 --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t
6074 is 32-bit. So we need an explicit narrowing conversion here.
6075 This is fine, because it's impossible to allocate or mmap an
6076 array/buffer larger than what size_t can represent. */
6077 return gdb::make_array_view (section
->buffer
, section
->size
);
6080 /* Lookup the index cache for the contents of the index associated to
6083 static gdb::array_view
<const gdb_byte
>
6084 get_gdb_index_contents_from_cache (objfile
*obj
, dwarf2_per_bfd
*dwarf2_per_bfd
)
6086 const bfd_build_id
*build_id
= build_id_bfd_get (obj
->obfd
);
6087 if (build_id
== nullptr)
6090 return global_index_cache
.lookup_gdb_index (build_id
,
6091 &dwarf2_per_bfd
->index_cache_res
);
6094 /* Same as the above, but for DWZ. */
6096 static gdb::array_view
<const gdb_byte
>
6097 get_gdb_index_contents_from_cache_dwz (objfile
*obj
, dwz_file
*dwz
)
6099 const bfd_build_id
*build_id
= build_id_bfd_get (dwz
->dwz_bfd
.get ());
6100 if (build_id
== nullptr)
6103 return global_index_cache
.lookup_gdb_index (build_id
, &dwz
->index_cache_res
);
6106 /* See symfile.h. */
6109 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
6111 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
6112 dwarf2_per_bfd
*per_bfd
= per_objfile
->per_bfd
;
6114 /* If we're about to read full symbols, don't bother with the
6115 indices. In this case we also don't care if some other debug
6116 format is making psymtabs, because they are all about to be
6118 if ((objfile
->flags
& OBJF_READNOW
))
6120 /* When using READNOW, the using_index flag (set below) indicates that
6121 PER_BFD was already initialized, when we loaded some other objfile. */
6122 if (per_bfd
->using_index
)
6124 *index_kind
= dw_index_kind::GDB_INDEX
;
6125 per_objfile
->resize_symtabs ();
6129 per_bfd
->using_index
= 1;
6130 create_all_comp_units (per_objfile
);
6131 create_all_type_units (per_objfile
);
6132 per_bfd
->quick_file_names_table
6133 = create_quick_file_names_table (per_bfd
->all_comp_units
.size ());
6134 per_objfile
->resize_symtabs ();
6136 for (int i
= 0; i
< (per_bfd
->all_comp_units
.size ()
6137 + per_bfd
->all_type_units
.size ()); ++i
)
6139 dwarf2_per_cu_data
*per_cu
= per_bfd
->get_cutu (i
);
6141 per_cu
->v
.quick
= OBSTACK_ZALLOC (&per_bfd
->obstack
,
6142 struct dwarf2_per_cu_quick_data
);
6145 /* Return 1 so that gdb sees the "quick" functions. However,
6146 these functions will be no-ops because we will have expanded
6148 *index_kind
= dw_index_kind::GDB_INDEX
;
6152 /* Was a debug names index already read when we processed an objfile sharing
6154 if (per_bfd
->debug_names_table
!= nullptr)
6156 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6157 per_objfile
->objfile
->partial_symtabs
= per_bfd
->partial_symtabs
;
6158 per_objfile
->resize_symtabs ();
6162 /* Was a GDB index already read when we processed an objfile sharing
6164 if (per_bfd
->index_table
!= nullptr)
6166 *index_kind
= dw_index_kind::GDB_INDEX
;
6167 per_objfile
->objfile
->partial_symtabs
= per_bfd
->partial_symtabs
;
6168 per_objfile
->resize_symtabs ();
6172 /* There might already be partial symtabs built for this BFD. This happens
6173 when loading the same binary twice with the index-cache enabled. If so,
6174 don't try to read an index. The objfile / per_objfile initialization will
6175 be completed in dwarf2_build_psymtabs, in the standard partial symtabs
6177 if (per_bfd
->partial_symtabs
!= nullptr)
6180 if (dwarf2_read_debug_names (per_objfile
))
6182 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6183 per_objfile
->resize_symtabs ();
6187 if (dwarf2_read_gdb_index (per_objfile
,
6188 get_gdb_index_contents_from_section
<struct dwarf2_per_bfd
>,
6189 get_gdb_index_contents_from_section
<dwz_file
>))
6191 *index_kind
= dw_index_kind::GDB_INDEX
;
6192 per_objfile
->resize_symtabs ();
6196 /* ... otherwise, try to find the index in the index cache. */
6197 if (dwarf2_read_gdb_index (per_objfile
,
6198 get_gdb_index_contents_from_cache
,
6199 get_gdb_index_contents_from_cache_dwz
))
6201 global_index_cache
.hit ();
6202 *index_kind
= dw_index_kind::GDB_INDEX
;
6203 per_objfile
->resize_symtabs ();
6207 global_index_cache
.miss ();
6213 /* Build a partial symbol table. */
6216 dwarf2_build_psymtabs (struct objfile
*objfile
)
6218 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
6219 dwarf2_per_bfd
*per_bfd
= per_objfile
->per_bfd
;
6221 if (per_bfd
->partial_symtabs
!= nullptr)
6223 /* Partial symbols were already read, so now we can simply
6225 objfile
->partial_symtabs
= per_bfd
->partial_symtabs
;
6226 per_objfile
->resize_symtabs ();
6232 /* This isn't really ideal: all the data we allocate on the
6233 objfile's obstack is still uselessly kept around. However,
6234 freeing it seems unsafe. */
6235 psymtab_discarder
psymtabs (objfile
);
6236 dwarf2_build_psymtabs_hard (per_objfile
);
6239 per_objfile
->resize_symtabs ();
6241 /* (maybe) store an index in the cache. */
6242 global_index_cache
.store (per_objfile
);
6244 catch (const gdb_exception_error
&except
)
6246 exception_print (gdb_stderr
, except
);
6249 /* Finish by setting the local reference to partial symtabs, so that
6250 we don't try to read them again if reading another objfile with the same
6251 BFD. If we can't in fact share, this won't make a difference anyway as
6252 the dwarf2_per_bfd object won't be shared. */
6253 per_bfd
->partial_symtabs
= objfile
->partial_symtabs
;
6256 /* Find the base address of the compilation unit for range lists and
6257 location lists. It will normally be specified by DW_AT_low_pc.
6258 In DWARF-3 draft 4, the base address could be overridden by
6259 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6260 compilation units with discontinuous ranges. */
6263 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6265 struct attribute
*attr
;
6267 cu
->base_address
.reset ();
6269 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6270 if (attr
!= nullptr)
6271 cu
->base_address
= attr
->as_address ();
6274 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6275 if (attr
!= nullptr)
6276 cu
->base_address
= attr
->as_address ();
6280 /* Helper function that returns the proper abbrev section for
6283 static struct dwarf2_section_info
*
6284 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6286 struct dwarf2_section_info
*abbrev
;
6287 dwarf2_per_bfd
*per_bfd
= this_cu
->per_bfd
;
6289 if (this_cu
->is_dwz
)
6290 abbrev
= &dwarf2_get_dwz_file (per_bfd
)->abbrev
;
6292 abbrev
= &per_bfd
->abbrev
;
6297 /* Fetch the abbreviation table offset from a comp or type unit header. */
6300 read_abbrev_offset (dwarf2_per_objfile
*per_objfile
,
6301 struct dwarf2_section_info
*section
,
6302 sect_offset sect_off
)
6304 bfd
*abfd
= section
->get_bfd_owner ();
6305 const gdb_byte
*info_ptr
;
6306 unsigned int initial_length_size
, offset_size
;
6309 section
->read (per_objfile
->objfile
);
6310 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6311 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6312 offset_size
= initial_length_size
== 4 ? 4 : 8;
6313 info_ptr
+= initial_length_size
;
6315 version
= read_2_bytes (abfd
, info_ptr
);
6319 /* Skip unit type and address size. */
6323 return (sect_offset
) read_offset (abfd
, info_ptr
, offset_size
);
6326 /* A partial symtab that is used only for include files. */
6327 struct dwarf2_include_psymtab
: public partial_symtab
6329 dwarf2_include_psymtab (const char *filename
, struct objfile
*objfile
)
6330 : partial_symtab (filename
, objfile
)
6334 void read_symtab (struct objfile
*objfile
) override
6336 /* It's an include file, no symbols to read for it.
6337 Everything is in the includer symtab. */
6339 /* The expansion of a dwarf2_include_psymtab is just a trigger for
6340 expansion of the includer psymtab. We use the dependencies[0] field to
6341 model the includer. But if we go the regular route of calling
6342 expand_psymtab here, and having expand_psymtab call expand_dependencies
6343 to expand the includer, we'll only use expand_psymtab on the includer
6344 (making it a non-toplevel psymtab), while if we expand the includer via
6345 another path, we'll use read_symtab (making it a toplevel psymtab).
6346 So, don't pretend a dwarf2_include_psymtab is an actual toplevel
6347 psymtab, and trigger read_symtab on the includer here directly. */
6348 includer ()->read_symtab (objfile
);
6351 void expand_psymtab (struct objfile
*objfile
) override
6353 /* This is not called by read_symtab, and should not be called by any
6354 expand_dependencies. */
6358 bool readin_p (struct objfile
*objfile
) const override
6360 return includer ()->readin_p (objfile
);
6363 compunit_symtab
*get_compunit_symtab (struct objfile
*objfile
) const override
6369 partial_symtab
*includer () const
6371 /* An include psymtab has exactly one dependency: the psymtab that
6373 gdb_assert (this->number_of_dependencies
== 1);
6374 return this->dependencies
[0];
6378 /* Allocate a new partial symtab for file named NAME and mark this new
6379 partial symtab as being an include of PST. */
6382 dwarf2_create_include_psymtab (const char *name
, dwarf2_psymtab
*pst
,
6383 struct objfile
*objfile
)
6385 dwarf2_include_psymtab
*subpst
= new dwarf2_include_psymtab (name
, objfile
);
6387 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6388 subpst
->dirname
= pst
->dirname
;
6390 subpst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (1);
6391 subpst
->dependencies
[0] = pst
;
6392 subpst
->number_of_dependencies
= 1;
6395 /* Read the Line Number Program data and extract the list of files
6396 included by the source file represented by PST. Build an include
6397 partial symtab for each of these included files. */
6400 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6401 struct die_info
*die
,
6402 dwarf2_psymtab
*pst
)
6405 struct attribute
*attr
;
6407 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6408 if (attr
!= nullptr && attr
->form_is_unsigned ())
6409 lh
= dwarf_decode_line_header ((sect_offset
) attr
->as_unsigned (), cu
);
6411 return; /* No linetable, so no includes. */
6413 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6414 that we pass in the raw text_low here; that is ok because we're
6415 only decoding the line table to make include partial symtabs, and
6416 so the addresses aren't really used. */
6417 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6418 pst
->raw_text_low (), 1);
6422 hash_signatured_type (const void *item
)
6424 const struct signatured_type
*sig_type
6425 = (const struct signatured_type
*) item
;
6427 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6428 return sig_type
->signature
;
6432 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6434 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6435 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6437 return lhs
->signature
== rhs
->signature
;
6440 /* Allocate a hash table for signatured types. */
6443 allocate_signatured_type_table ()
6445 return htab_up (htab_create_alloc (41,
6446 hash_signatured_type
,
6448 NULL
, xcalloc
, xfree
));
6451 /* A helper function to add a signatured type CU to a table. */
6454 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6456 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6457 std::vector
<signatured_type
*> *all_type_units
6458 = (std::vector
<signatured_type
*> *) datum
;
6460 all_type_units
->push_back (sigt
);
6465 /* A helper for create_debug_types_hash_table. Read types from SECTION
6466 and fill them into TYPES_HTAB. It will process only type units,
6467 therefore DW_UT_type. */
6470 create_debug_type_hash_table (dwarf2_per_objfile
*per_objfile
,
6471 struct dwo_file
*dwo_file
,
6472 dwarf2_section_info
*section
, htab_up
&types_htab
,
6473 rcuh_kind section_kind
)
6475 struct objfile
*objfile
= per_objfile
->objfile
;
6476 struct dwarf2_section_info
*abbrev_section
;
6478 const gdb_byte
*info_ptr
, *end_ptr
;
6480 abbrev_section
= (dwo_file
!= NULL
6481 ? &dwo_file
->sections
.abbrev
6482 : &per_objfile
->per_bfd
->abbrev
);
6484 dwarf_read_debug_printf ("Reading %s for %s:",
6485 section
->get_name (),
6486 abbrev_section
->get_file_name ());
6488 section
->read (objfile
);
6489 info_ptr
= section
->buffer
;
6491 if (info_ptr
== NULL
)
6494 /* We can't set abfd until now because the section may be empty or
6495 not present, in which case the bfd is unknown. */
6496 abfd
= section
->get_bfd_owner ();
6498 /* We don't use cutu_reader here because we don't need to read
6499 any dies: the signature is in the header. */
6501 end_ptr
= info_ptr
+ section
->size
;
6502 while (info_ptr
< end_ptr
)
6504 struct signatured_type
*sig_type
;
6505 struct dwo_unit
*dwo_tu
;
6507 const gdb_byte
*ptr
= info_ptr
;
6508 struct comp_unit_head header
;
6509 unsigned int length
;
6511 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6513 /* Initialize it due to a false compiler warning. */
6514 header
.signature
= -1;
6515 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6517 /* We need to read the type's signature in order to build the hash
6518 table, but we don't need anything else just yet. */
6520 ptr
= read_and_check_comp_unit_head (per_objfile
, &header
, section
,
6521 abbrev_section
, ptr
, section_kind
);
6523 length
= header
.get_length ();
6525 /* Skip dummy type units. */
6526 if (ptr
>= info_ptr
+ length
6527 || peek_abbrev_code (abfd
, ptr
) == 0
6528 || (header
.unit_type
!= DW_UT_type
6529 && header
.unit_type
!= DW_UT_split_type
))
6535 if (types_htab
== NULL
)
6538 types_htab
= allocate_dwo_unit_table ();
6540 types_htab
= allocate_signatured_type_table ();
6546 dwo_tu
= OBSTACK_ZALLOC (&per_objfile
->per_bfd
->obstack
, dwo_unit
);
6547 dwo_tu
->dwo_file
= dwo_file
;
6548 dwo_tu
->signature
= header
.signature
;
6549 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6550 dwo_tu
->section
= section
;
6551 dwo_tu
->sect_off
= sect_off
;
6552 dwo_tu
->length
= length
;
6556 /* N.B.: type_offset is not usable if this type uses a DWO file.
6557 The real type_offset is in the DWO file. */
6559 sig_type
= per_objfile
->per_bfd
->allocate_signatured_type ();
6560 sig_type
->signature
= header
.signature
;
6561 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6562 sig_type
->per_cu
.is_debug_types
= 1;
6563 sig_type
->per_cu
.section
= section
;
6564 sig_type
->per_cu
.sect_off
= sect_off
;
6565 sig_type
->per_cu
.length
= length
;
6568 slot
= htab_find_slot (types_htab
.get (),
6569 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6571 gdb_assert (slot
!= NULL
);
6574 sect_offset dup_sect_off
;
6578 const struct dwo_unit
*dup_tu
6579 = (const struct dwo_unit
*) *slot
;
6581 dup_sect_off
= dup_tu
->sect_off
;
6585 const struct signatured_type
*dup_tu
6586 = (const struct signatured_type
*) *slot
;
6588 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6591 complaint (_("debug type entry at offset %s is duplicate to"
6592 " the entry at offset %s, signature %s"),
6593 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6594 hex_string (header
.signature
));
6596 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6598 dwarf_read_debug_printf_v (" offset %s, signature %s",
6599 sect_offset_str (sect_off
),
6600 hex_string (header
.signature
));
6606 /* Create the hash table of all entries in the .debug_types
6607 (or .debug_types.dwo) section(s).
6608 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6609 otherwise it is NULL.
6611 The result is a pointer to the hash table or NULL if there are no types.
6613 Note: This function processes DWO files only, not DWP files. */
6616 create_debug_types_hash_table (dwarf2_per_objfile
*per_objfile
,
6617 struct dwo_file
*dwo_file
,
6618 gdb::array_view
<dwarf2_section_info
> type_sections
,
6619 htab_up
&types_htab
)
6621 for (dwarf2_section_info
§ion
: type_sections
)
6622 create_debug_type_hash_table (per_objfile
, dwo_file
, §ion
, types_htab
,
6626 /* Create the hash table of all entries in the .debug_types section,
6627 and initialize all_type_units.
6628 The result is zero if there is an error (e.g. missing .debug_types section),
6629 otherwise non-zero. */
6632 create_all_type_units (dwarf2_per_objfile
*per_objfile
)
6636 create_debug_type_hash_table (per_objfile
, NULL
, &per_objfile
->per_bfd
->info
,
6637 types_htab
, rcuh_kind::COMPILE
);
6638 create_debug_types_hash_table (per_objfile
, NULL
, per_objfile
->per_bfd
->types
,
6640 if (types_htab
== NULL
)
6642 per_objfile
->per_bfd
->signatured_types
= NULL
;
6646 per_objfile
->per_bfd
->signatured_types
= std::move (types_htab
);
6648 gdb_assert (per_objfile
->per_bfd
->all_type_units
.empty ());
6649 per_objfile
->per_bfd
->all_type_units
.reserve
6650 (htab_elements (per_objfile
->per_bfd
->signatured_types
.get ()));
6652 htab_traverse_noresize (per_objfile
->per_bfd
->signatured_types
.get (),
6653 add_signatured_type_cu_to_table
,
6654 &per_objfile
->per_bfd
->all_type_units
);
6659 /* Add an entry for signature SIG to dwarf2_per_objfile->per_bfd->signatured_types.
6660 If SLOT is non-NULL, it is the entry to use in the hash table.
6661 Otherwise we find one. */
6663 static struct signatured_type
*
6664 add_type_unit (dwarf2_per_objfile
*per_objfile
, ULONGEST sig
, void **slot
)
6666 if (per_objfile
->per_bfd
->all_type_units
.size ()
6667 == per_objfile
->per_bfd
->all_type_units
.capacity ())
6668 ++per_objfile
->per_bfd
->tu_stats
.nr_all_type_units_reallocs
;
6670 signatured_type
*sig_type
= per_objfile
->per_bfd
->allocate_signatured_type ();
6672 per_objfile
->resize_symtabs ();
6674 per_objfile
->per_bfd
->all_type_units
.push_back (sig_type
);
6675 sig_type
->signature
= sig
;
6676 sig_type
->per_cu
.is_debug_types
= 1;
6677 if (per_objfile
->per_bfd
->using_index
)
6679 sig_type
->per_cu
.v
.quick
=
6680 OBSTACK_ZALLOC (&per_objfile
->per_bfd
->obstack
,
6681 struct dwarf2_per_cu_quick_data
);
6686 slot
= htab_find_slot (per_objfile
->per_bfd
->signatured_types
.get (),
6689 gdb_assert (*slot
== NULL
);
6691 /* The rest of sig_type must be filled in by the caller. */
6695 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6696 Fill in SIG_ENTRY with DWO_ENTRY. */
6699 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
*per_objfile
,
6700 struct signatured_type
*sig_entry
,
6701 struct dwo_unit
*dwo_entry
)
6703 dwarf2_per_bfd
*per_bfd
= per_objfile
->per_bfd
;
6705 /* Make sure we're not clobbering something we don't expect to. */
6706 gdb_assert (! sig_entry
->per_cu
.queued
);
6707 gdb_assert (per_objfile
->get_cu (&sig_entry
->per_cu
) == NULL
);
6708 if (per_bfd
->using_index
)
6710 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6711 gdb_assert (!per_objfile
->symtab_set_p (&sig_entry
->per_cu
));
6714 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6715 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6716 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6717 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6718 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6720 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6721 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6722 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6723 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6724 sig_entry
->per_cu
.per_bfd
= per_bfd
;
6725 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6726 sig_entry
->dwo_unit
= dwo_entry
;
6729 /* Subroutine of lookup_signatured_type.
6730 If we haven't read the TU yet, create the signatured_type data structure
6731 for a TU to be read in directly from a DWO file, bypassing the stub.
6732 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6733 using .gdb_index, then when reading a CU we want to stay in the DWO file
6734 containing that CU. Otherwise we could end up reading several other DWO
6735 files (due to comdat folding) to process the transitive closure of all the
6736 mentioned TUs, and that can be slow. The current DWO file will have every
6737 type signature that it needs.
6738 We only do this for .gdb_index because in the psymtab case we already have
6739 to read all the DWOs to build the type unit groups. */
6741 static struct signatured_type
*
6742 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6744 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
6745 struct dwo_file
*dwo_file
;
6746 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6747 struct signatured_type find_sig_entry
, *sig_entry
;
6750 gdb_assert (cu
->dwo_unit
&& per_objfile
->per_bfd
->using_index
);
6752 /* If TU skeletons have been removed then we may not have read in any
6754 if (per_objfile
->per_bfd
->signatured_types
== NULL
)
6755 per_objfile
->per_bfd
->signatured_types
= allocate_signatured_type_table ();
6757 /* We only ever need to read in one copy of a signatured type.
6758 Use the global signatured_types array to do our own comdat-folding
6759 of types. If this is the first time we're reading this TU, and
6760 the TU has an entry in .gdb_index, replace the recorded data from
6761 .gdb_index with this TU. */
6763 find_sig_entry
.signature
= sig
;
6764 slot
= htab_find_slot (per_objfile
->per_bfd
->signatured_types
.get (),
6765 &find_sig_entry
, INSERT
);
6766 sig_entry
= (struct signatured_type
*) *slot
;
6768 /* We can get here with the TU already read, *or* in the process of being
6769 read. Don't reassign the global entry to point to this DWO if that's
6770 the case. Also note that if the TU is already being read, it may not
6771 have come from a DWO, the program may be a mix of Fission-compiled
6772 code and non-Fission-compiled code. */
6774 /* Have we already tried to read this TU?
6775 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6776 needn't exist in the global table yet). */
6777 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6780 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6781 dwo_unit of the TU itself. */
6782 dwo_file
= cu
->dwo_unit
->dwo_file
;
6784 /* Ok, this is the first time we're reading this TU. */
6785 if (dwo_file
->tus
== NULL
)
6787 find_dwo_entry
.signature
= sig
;
6788 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
6790 if (dwo_entry
== NULL
)
6793 /* If the global table doesn't have an entry for this TU, add one. */
6794 if (sig_entry
== NULL
)
6795 sig_entry
= add_type_unit (per_objfile
, sig
, slot
);
6797 fill_in_sig_entry_from_dwo_entry (per_objfile
, sig_entry
, dwo_entry
);
6798 sig_entry
->per_cu
.tu_read
= 1;
6802 /* Subroutine of lookup_signatured_type.
6803 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6804 then try the DWP file. If the TU stub (skeleton) has been removed then
6805 it won't be in .gdb_index. */
6807 static struct signatured_type
*
6808 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6810 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
6811 struct dwp_file
*dwp_file
= get_dwp_file (per_objfile
);
6812 struct dwo_unit
*dwo_entry
;
6813 struct signatured_type find_sig_entry
, *sig_entry
;
6816 gdb_assert (cu
->dwo_unit
&& per_objfile
->per_bfd
->using_index
);
6817 gdb_assert (dwp_file
!= NULL
);
6819 /* If TU skeletons have been removed then we may not have read in any
6821 if (per_objfile
->per_bfd
->signatured_types
== NULL
)
6822 per_objfile
->per_bfd
->signatured_types
= allocate_signatured_type_table ();
6824 find_sig_entry
.signature
= sig
;
6825 slot
= htab_find_slot (per_objfile
->per_bfd
->signatured_types
.get (),
6826 &find_sig_entry
, INSERT
);
6827 sig_entry
= (struct signatured_type
*) *slot
;
6829 /* Have we already tried to read this TU?
6830 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6831 needn't exist in the global table yet). */
6832 if (sig_entry
!= NULL
)
6835 if (dwp_file
->tus
== NULL
)
6837 dwo_entry
= lookup_dwo_unit_in_dwp (per_objfile
, dwp_file
, NULL
, sig
,
6838 1 /* is_debug_types */);
6839 if (dwo_entry
== NULL
)
6842 sig_entry
= add_type_unit (per_objfile
, sig
, slot
);
6843 fill_in_sig_entry_from_dwo_entry (per_objfile
, sig_entry
, dwo_entry
);
6848 /* Lookup a signature based type for DW_FORM_ref_sig8.
6849 Returns NULL if signature SIG is not present in the table.
6850 It is up to the caller to complain about this. */
6852 static struct signatured_type
*
6853 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6855 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
6857 if (cu
->dwo_unit
&& per_objfile
->per_bfd
->using_index
)
6859 /* We're in a DWO/DWP file, and we're using .gdb_index.
6860 These cases require special processing. */
6861 if (get_dwp_file (per_objfile
) == NULL
)
6862 return lookup_dwo_signatured_type (cu
, sig
);
6864 return lookup_dwp_signatured_type (cu
, sig
);
6868 struct signatured_type find_entry
, *entry
;
6870 if (per_objfile
->per_bfd
->signatured_types
== NULL
)
6872 find_entry
.signature
= sig
;
6873 entry
= ((struct signatured_type
*)
6874 htab_find (per_objfile
->per_bfd
->signatured_types
.get (),
6880 /* Low level DIE reading support. */
6882 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
6885 init_cu_die_reader (struct die_reader_specs
*reader
,
6886 struct dwarf2_cu
*cu
,
6887 struct dwarf2_section_info
*section
,
6888 struct dwo_file
*dwo_file
,
6889 struct abbrev_table
*abbrev_table
)
6891 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
6892 reader
->abfd
= section
->get_bfd_owner ();
6894 reader
->dwo_file
= dwo_file
;
6895 reader
->die_section
= section
;
6896 reader
->buffer
= section
->buffer
;
6897 reader
->buffer_end
= section
->buffer
+ section
->size
;
6898 reader
->abbrev_table
= abbrev_table
;
6901 /* Subroutine of cutu_reader to simplify it.
6902 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
6903 There's just a lot of work to do, and cutu_reader is big enough
6906 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
6907 from it to the DIE in the DWO. If NULL we are skipping the stub.
6908 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
6909 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
6910 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
6911 STUB_COMP_DIR may be non-NULL.
6912 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE
6913 are filled in with the info of the DIE from the DWO file.
6914 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
6915 from the dwo. Since *RESULT_READER references this abbrev table, it must be
6916 kept around for at least as long as *RESULT_READER.
6918 The result is non-zero if a valid (non-dummy) DIE was found. */
6921 read_cutu_die_from_dwo (dwarf2_cu
*cu
,
6922 struct dwo_unit
*dwo_unit
,
6923 struct die_info
*stub_comp_unit_die
,
6924 const char *stub_comp_dir
,
6925 struct die_reader_specs
*result_reader
,
6926 const gdb_byte
**result_info_ptr
,
6927 struct die_info
**result_comp_unit_die
,
6928 abbrev_table_up
*result_dwo_abbrev_table
)
6930 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
6931 dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6932 struct objfile
*objfile
= per_objfile
->objfile
;
6934 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6935 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
6936 int i
,num_extra_attrs
;
6937 struct dwarf2_section_info
*dwo_abbrev_section
;
6938 struct die_info
*comp_unit_die
;
6940 /* At most one of these may be provided. */
6941 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
6943 /* These attributes aren't processed until later:
6944 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
6945 DW_AT_comp_dir is used now, to find the DWO file, but it is also
6946 referenced later. However, these attributes are found in the stub
6947 which we won't have later. In order to not impose this complication
6948 on the rest of the code, we read them here and copy them to the
6957 if (stub_comp_unit_die
!= NULL
)
6959 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
6961 if (!per_cu
->is_debug_types
)
6962 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
6963 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
6964 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
6965 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
6966 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
6968 cu
->addr_base
= stub_comp_unit_die
->addr_base ();
6970 /* There should be a DW_AT_rnglists_base (DW_AT_GNU_ranges_base) attribute
6971 here (if needed). We need the value before we can process
6973 cu
->ranges_base
= stub_comp_unit_die
->ranges_base ();
6975 else if (stub_comp_dir
!= NULL
)
6977 /* Reconstruct the comp_dir attribute to simplify the code below. */
6978 comp_dir
= OBSTACK_ZALLOC (&cu
->comp_unit_obstack
, struct attribute
);
6979 comp_dir
->name
= DW_AT_comp_dir
;
6980 comp_dir
->form
= DW_FORM_string
;
6981 comp_dir
->set_string_noncanonical (stub_comp_dir
);
6984 /* Set up for reading the DWO CU/TU. */
6985 cu
->dwo_unit
= dwo_unit
;
6986 dwarf2_section_info
*section
= dwo_unit
->section
;
6987 section
->read (objfile
);
6988 abfd
= section
->get_bfd_owner ();
6989 begin_info_ptr
= info_ptr
= (section
->buffer
6990 + to_underlying (dwo_unit
->sect_off
));
6991 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
6993 if (per_cu
->is_debug_types
)
6995 signatured_type
*sig_type
= (struct signatured_type
*) per_cu
;
6997 info_ptr
= read_and_check_comp_unit_head (per_objfile
, &cu
->header
,
6998 section
, dwo_abbrev_section
,
6999 info_ptr
, rcuh_kind::TYPE
);
7000 /* This is not an assert because it can be caused by bad debug info. */
7001 if (sig_type
->signature
!= cu
->header
.signature
)
7003 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
7004 " TU at offset %s [in module %s]"),
7005 hex_string (sig_type
->signature
),
7006 hex_string (cu
->header
.signature
),
7007 sect_offset_str (dwo_unit
->sect_off
),
7008 bfd_get_filename (abfd
));
7010 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7011 /* For DWOs coming from DWP files, we don't know the CU length
7012 nor the type's offset in the TU until now. */
7013 dwo_unit
->length
= cu
->header
.get_length ();
7014 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
7016 /* Establish the type offset that can be used to lookup the type.
7017 For DWO files, we don't know it until now. */
7018 sig_type
->type_offset_in_section
7019 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
7023 info_ptr
= read_and_check_comp_unit_head (per_objfile
, &cu
->header
,
7024 section
, dwo_abbrev_section
,
7025 info_ptr
, rcuh_kind::COMPILE
);
7026 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7027 /* For DWOs coming from DWP files, we don't know the CU length
7029 dwo_unit
->length
= cu
->header
.get_length ();
7032 dwo_abbrev_section
->read (objfile
);
7033 *result_dwo_abbrev_table
7034 = abbrev_table::read (dwo_abbrev_section
, cu
->header
.abbrev_sect_off
);
7035 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
7036 result_dwo_abbrev_table
->get ());
7038 /* Read in the die, but leave space to copy over the attributes
7039 from the stub. This has the benefit of simplifying the rest of
7040 the code - all the work to maintain the illusion of a single
7041 DW_TAG_{compile,type}_unit DIE is done here. */
7042 num_extra_attrs
= ((stmt_list
!= NULL
)
7046 + (comp_dir
!= NULL
));
7047 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
7050 /* Copy over the attributes from the stub to the DIE we just read in. */
7051 comp_unit_die
= *result_comp_unit_die
;
7052 i
= comp_unit_die
->num_attrs
;
7053 if (stmt_list
!= NULL
)
7054 comp_unit_die
->attrs
[i
++] = *stmt_list
;
7056 comp_unit_die
->attrs
[i
++] = *low_pc
;
7057 if (high_pc
!= NULL
)
7058 comp_unit_die
->attrs
[i
++] = *high_pc
;
7060 comp_unit_die
->attrs
[i
++] = *ranges
;
7061 if (comp_dir
!= NULL
)
7062 comp_unit_die
->attrs
[i
++] = *comp_dir
;
7063 comp_unit_die
->num_attrs
+= num_extra_attrs
;
7065 if (dwarf_die_debug
)
7067 fprintf_unfiltered (gdb_stdlog
,
7068 "Read die from %s@0x%x of %s:\n",
7069 section
->get_name (),
7070 (unsigned) (begin_info_ptr
- section
->buffer
),
7071 bfd_get_filename (abfd
));
7072 dump_die (comp_unit_die
, dwarf_die_debug
);
7075 /* Skip dummy compilation units. */
7076 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
7077 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7080 *result_info_ptr
= info_ptr
;
7084 /* Return the signature of the compile unit, if found. In DWARF 4 and before,
7085 the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the
7086 signature is part of the header. */
7087 static gdb::optional
<ULONGEST
>
7088 lookup_dwo_id (struct dwarf2_cu
*cu
, struct die_info
* comp_unit_die
)
7090 if (cu
->header
.version
>= 5)
7091 return cu
->header
.signature
;
7092 struct attribute
*attr
;
7093 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
7094 if (attr
== nullptr || !attr
->form_is_unsigned ())
7095 return gdb::optional
<ULONGEST
> ();
7096 return attr
->as_unsigned ();
7099 /* Subroutine of cutu_reader to simplify it.
7100 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
7101 Returns NULL if the specified DWO unit cannot be found. */
7103 static struct dwo_unit
*
7104 lookup_dwo_unit (dwarf2_cu
*cu
, die_info
*comp_unit_die
, const char *dwo_name
)
7106 dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7107 struct dwo_unit
*dwo_unit
;
7108 const char *comp_dir
;
7110 gdb_assert (cu
!= NULL
);
7112 /* Yeah, we look dwo_name up again, but it simplifies the code. */
7113 dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
7114 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7116 if (per_cu
->is_debug_types
)
7117 dwo_unit
= lookup_dwo_type_unit (cu
, dwo_name
, comp_dir
);
7120 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
7122 if (!signature
.has_value ())
7123 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
7125 dwo_name
, bfd_get_filename (per_cu
->per_bfd
->obfd
));
7127 dwo_unit
= lookup_dwo_comp_unit (cu
, dwo_name
, comp_dir
, *signature
);
7133 /* Subroutine of cutu_reader to simplify it.
7134 See it for a description of the parameters.
7135 Read a TU directly from a DWO file, bypassing the stub. */
7138 cutu_reader::init_tu_and_read_dwo_dies (dwarf2_per_cu_data
*this_cu
,
7139 dwarf2_per_objfile
*per_objfile
,
7140 dwarf2_cu
*existing_cu
)
7142 struct signatured_type
*sig_type
;
7144 /* Verify we can do the following downcast, and that we have the
7146 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
7147 sig_type
= (struct signatured_type
*) this_cu
;
7148 gdb_assert (sig_type
->dwo_unit
!= NULL
);
7152 if (existing_cu
!= nullptr)
7155 gdb_assert (cu
->dwo_unit
== sig_type
->dwo_unit
);
7156 /* There's no need to do the rereading_dwo_cu handling that
7157 cutu_reader does since we don't read the stub. */
7161 /* If an existing_cu is provided, a dwarf2_cu must not exist for this_cu
7162 in per_objfile yet. */
7163 gdb_assert (per_objfile
->get_cu (this_cu
) == nullptr);
7164 m_new_cu
.reset (new dwarf2_cu (this_cu
, per_objfile
));
7165 cu
= m_new_cu
.get ();
7168 /* A future optimization, if needed, would be to use an existing
7169 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
7170 could share abbrev tables. */
7172 if (read_cutu_die_from_dwo (cu
, sig_type
->dwo_unit
,
7173 NULL
/* stub_comp_unit_die */,
7174 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
7177 &m_dwo_abbrev_table
) == 0)
7184 /* Initialize a CU (or TU) and read its DIEs.
7185 If the CU defers to a DWO file, read the DWO file as well.
7187 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
7188 Otherwise the table specified in the comp unit header is read in and used.
7189 This is an optimization for when we already have the abbrev table.
7191 If EXISTING_CU is non-NULL, then use it. Otherwise, a new CU is
7194 cutu_reader::cutu_reader (dwarf2_per_cu_data
*this_cu
,
7195 dwarf2_per_objfile
*per_objfile
,
7196 struct abbrev_table
*abbrev_table
,
7197 dwarf2_cu
*existing_cu
,
7199 : die_reader_specs
{},
7202 struct objfile
*objfile
= per_objfile
->objfile
;
7203 struct dwarf2_section_info
*section
= this_cu
->section
;
7204 bfd
*abfd
= section
->get_bfd_owner ();
7205 const gdb_byte
*begin_info_ptr
;
7206 struct signatured_type
*sig_type
= NULL
;
7207 struct dwarf2_section_info
*abbrev_section
;
7208 /* Non-zero if CU currently points to a DWO file and we need to
7209 reread it. When this happens we need to reread the skeleton die
7210 before we can reread the DWO file (this only applies to CUs, not TUs). */
7211 int rereading_dwo_cu
= 0;
7213 if (dwarf_die_debug
)
7214 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7215 this_cu
->is_debug_types
? "type" : "comp",
7216 sect_offset_str (this_cu
->sect_off
));
7218 /* If we're reading a TU directly from a DWO file, including a virtual DWO
7219 file (instead of going through the stub), short-circuit all of this. */
7220 if (this_cu
->reading_dwo_directly
)
7222 /* Narrow down the scope of possibilities to have to understand. */
7223 gdb_assert (this_cu
->is_debug_types
);
7224 gdb_assert (abbrev_table
== NULL
);
7225 init_tu_and_read_dwo_dies (this_cu
, per_objfile
, existing_cu
);
7229 /* This is cheap if the section is already read in. */
7230 section
->read (objfile
);
7232 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7234 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
7238 if (existing_cu
!= nullptr)
7241 /* If this CU is from a DWO file we need to start over, we need to
7242 refetch the attributes from the skeleton CU.
7243 This could be optimized by retrieving those attributes from when we
7244 were here the first time: the previous comp_unit_die was stored in
7245 comp_unit_obstack. But there's no data yet that we need this
7247 if (cu
->dwo_unit
!= NULL
)
7248 rereading_dwo_cu
= 1;
7252 /* If an existing_cu is provided, a dwarf2_cu must not exist for this_cu
7253 in per_objfile yet. */
7254 gdb_assert (per_objfile
->get_cu (this_cu
) == nullptr);
7255 m_new_cu
.reset (new dwarf2_cu (this_cu
, per_objfile
));
7256 cu
= m_new_cu
.get ();
7259 /* Get the header. */
7260 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7262 /* We already have the header, there's no need to read it in again. */
7263 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7267 if (this_cu
->is_debug_types
)
7269 info_ptr
= read_and_check_comp_unit_head (per_objfile
, &cu
->header
,
7270 section
, abbrev_section
,
7271 info_ptr
, rcuh_kind::TYPE
);
7273 /* Since per_cu is the first member of struct signatured_type,
7274 we can go from a pointer to one to a pointer to the other. */
7275 sig_type
= (struct signatured_type
*) this_cu
;
7276 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7277 gdb_assert (sig_type
->type_offset_in_tu
7278 == cu
->header
.type_cu_offset_in_tu
);
7279 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7281 /* LENGTH has not been set yet for type units if we're
7282 using .gdb_index. */
7283 this_cu
->length
= cu
->header
.get_length ();
7285 /* Establish the type offset that can be used to lookup the type. */
7286 sig_type
->type_offset_in_section
=
7287 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7289 this_cu
->dwarf_version
= cu
->header
.version
;
7293 info_ptr
= read_and_check_comp_unit_head (per_objfile
, &cu
->header
,
7294 section
, abbrev_section
,
7296 rcuh_kind::COMPILE
);
7298 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7299 if (this_cu
->length
== 0)
7300 this_cu
->length
= cu
->header
.get_length ();
7302 gdb_assert (this_cu
->length
== cu
->header
.get_length ());
7303 this_cu
->dwarf_version
= cu
->header
.version
;
7307 /* Skip dummy compilation units. */
7308 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7309 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7315 /* If we don't have them yet, read the abbrevs for this compilation unit.
7316 And if we need to read them now, make sure they're freed when we're
7318 if (abbrev_table
!= NULL
)
7319 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7322 abbrev_section
->read (objfile
);
7323 m_abbrev_table_holder
7324 = abbrev_table::read (abbrev_section
, cu
->header
.abbrev_sect_off
);
7325 abbrev_table
= m_abbrev_table_holder
.get ();
7328 /* Read the top level CU/TU die. */
7329 init_cu_die_reader (this, cu
, section
, NULL
, abbrev_table
);
7330 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7332 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
7338 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7339 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7340 table from the DWO file and pass the ownership over to us. It will be
7341 referenced from READER, so we must make sure to free it after we're done
7344 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7345 DWO CU, that this test will fail (the attribute will not be present). */
7346 const char *dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
7347 if (dwo_name
!= nullptr)
7349 struct dwo_unit
*dwo_unit
;
7350 struct die_info
*dwo_comp_unit_die
;
7352 if (comp_unit_die
->has_children
)
7354 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
7355 " has children (offset %s) [in module %s]"),
7356 sect_offset_str (this_cu
->sect_off
),
7357 bfd_get_filename (abfd
));
7359 dwo_unit
= lookup_dwo_unit (cu
, comp_unit_die
, dwo_name
);
7360 if (dwo_unit
!= NULL
)
7362 if (read_cutu_die_from_dwo (cu
, dwo_unit
,
7363 comp_unit_die
, NULL
,
7366 &m_dwo_abbrev_table
) == 0)
7372 comp_unit_die
= dwo_comp_unit_die
;
7376 /* Yikes, we couldn't find the rest of the DIE, we only have
7377 the stub. A complaint has already been logged. There's
7378 not much more we can do except pass on the stub DIE to
7379 die_reader_func. We don't want to throw an error on bad
7386 cutu_reader::keep ()
7388 /* Done, clean up. */
7389 gdb_assert (!dummy_p
);
7390 if (m_new_cu
!= NULL
)
7392 /* Save this dwarf2_cu in the per_objfile. The per_objfile owns it
7394 dwarf2_per_objfile
*per_objfile
= m_new_cu
->per_objfile
;
7395 per_objfile
->set_cu (m_this_cu
, m_new_cu
.release ());
7399 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name (DW_AT_dwo_name)
7400 if present. DWO_FILE, if non-NULL, is the DWO file to read (the caller is
7401 assumed to have already done the lookup to find the DWO file).
7403 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7404 THIS_CU->is_debug_types, but nothing else.
7406 We fill in THIS_CU->length.
7408 THIS_CU->cu is always freed when done.
7409 This is done in order to not leave THIS_CU->cu in a state where we have
7410 to care whether it refers to the "main" CU or the DWO CU.
7412 When parent_cu is passed, it is used to provide a default value for
7413 str_offsets_base and addr_base from the parent. */
7415 cutu_reader::cutu_reader (dwarf2_per_cu_data
*this_cu
,
7416 dwarf2_per_objfile
*per_objfile
,
7417 struct dwarf2_cu
*parent_cu
,
7418 struct dwo_file
*dwo_file
)
7419 : die_reader_specs
{},
7422 struct objfile
*objfile
= per_objfile
->objfile
;
7423 struct dwarf2_section_info
*section
= this_cu
->section
;
7424 bfd
*abfd
= section
->get_bfd_owner ();
7425 struct dwarf2_section_info
*abbrev_section
;
7426 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7428 if (dwarf_die_debug
)
7429 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7430 this_cu
->is_debug_types
? "type" : "comp",
7431 sect_offset_str (this_cu
->sect_off
));
7433 gdb_assert (per_objfile
->get_cu (this_cu
) == nullptr);
7435 abbrev_section
= (dwo_file
!= NULL
7436 ? &dwo_file
->sections
.abbrev
7437 : get_abbrev_section_for_cu (this_cu
));
7439 /* This is cheap if the section is already read in. */
7440 section
->read (objfile
);
7442 m_new_cu
.reset (new dwarf2_cu (this_cu
, per_objfile
));
7444 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7445 info_ptr
= read_and_check_comp_unit_head (per_objfile
, &m_new_cu
->header
,
7446 section
, abbrev_section
, info_ptr
,
7447 (this_cu
->is_debug_types
7449 : rcuh_kind::COMPILE
));
7451 if (parent_cu
!= nullptr)
7453 m_new_cu
->str_offsets_base
= parent_cu
->str_offsets_base
;
7454 m_new_cu
->addr_base
= parent_cu
->addr_base
;
7456 this_cu
->length
= m_new_cu
->header
.get_length ();
7458 /* Skip dummy compilation units. */
7459 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7460 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7466 abbrev_section
->read (objfile
);
7467 m_abbrev_table_holder
7468 = abbrev_table::read (abbrev_section
, m_new_cu
->header
.abbrev_sect_off
);
7470 init_cu_die_reader (this, m_new_cu
.get (), section
, dwo_file
,
7471 m_abbrev_table_holder
.get ());
7472 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7476 /* Type Unit Groups.
7478 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7479 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7480 so that all types coming from the same compilation (.o file) are grouped
7481 together. A future step could be to put the types in the same symtab as
7482 the CU the types ultimately came from. */
7485 hash_type_unit_group (const void *item
)
7487 const struct type_unit_group
*tu_group
7488 = (const struct type_unit_group
*) item
;
7490 return hash_stmt_list_entry (&tu_group
->hash
);
7494 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7496 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7497 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7499 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7502 /* Allocate a hash table for type unit groups. */
7505 allocate_type_unit_groups_table ()
7507 return htab_up (htab_create_alloc (3,
7508 hash_type_unit_group
,
7510 NULL
, xcalloc
, xfree
));
7513 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7514 partial symtabs. We combine several TUs per psymtab to not let the size
7515 of any one psymtab grow too big. */
7516 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7517 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7519 /* Helper routine for get_type_unit_group.
7520 Create the type_unit_group object used to hold one or more TUs. */
7522 static struct type_unit_group
*
7523 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7525 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
7526 dwarf2_per_bfd
*per_bfd
= per_objfile
->per_bfd
;
7527 struct dwarf2_per_cu_data
*per_cu
;
7528 struct type_unit_group
*tu_group
;
7530 tu_group
= OBSTACK_ZALLOC (&per_objfile
->per_bfd
->obstack
, type_unit_group
);
7531 per_cu
= &tu_group
->per_cu
;
7532 per_cu
->per_bfd
= per_bfd
;
7534 if (per_bfd
->using_index
)
7536 per_cu
->v
.quick
= OBSTACK_ZALLOC (&per_bfd
->obstack
,
7537 struct dwarf2_per_cu_quick_data
);
7541 unsigned int line_offset
= to_underlying (line_offset_struct
);
7542 dwarf2_psymtab
*pst
;
7545 /* Give the symtab a useful name for debug purposes. */
7546 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7547 name
= string_printf ("<type_units_%d>",
7548 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7550 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7552 pst
= create_partial_symtab (per_cu
, per_objfile
, name
.c_str ());
7553 pst
->anonymous
= true;
7556 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7557 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7562 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7563 STMT_LIST is a DW_AT_stmt_list attribute. */
7565 static struct type_unit_group
*
7566 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7568 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
7569 struct tu_stats
*tu_stats
= &per_objfile
->per_bfd
->tu_stats
;
7570 struct type_unit_group
*tu_group
;
7572 unsigned int line_offset
;
7573 struct type_unit_group type_unit_group_for_lookup
;
7575 if (per_objfile
->per_bfd
->type_unit_groups
== NULL
)
7576 per_objfile
->per_bfd
->type_unit_groups
= allocate_type_unit_groups_table ();
7578 /* Do we need to create a new group, or can we use an existing one? */
7580 if (stmt_list
!= nullptr && stmt_list
->form_is_unsigned ())
7582 line_offset
= stmt_list
->as_unsigned ();
7583 ++tu_stats
->nr_symtab_sharers
;
7587 /* Ugh, no stmt_list. Rare, but we have to handle it.
7588 We can do various things here like create one group per TU or
7589 spread them over multiple groups to split up the expansion work.
7590 To avoid worst case scenarios (too many groups or too large groups)
7591 we, umm, group them in bunches. */
7592 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7593 | (tu_stats
->nr_stmt_less_type_units
7594 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7595 ++tu_stats
->nr_stmt_less_type_units
;
7598 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7599 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7600 slot
= htab_find_slot (per_objfile
->per_bfd
->type_unit_groups
.get (),
7601 &type_unit_group_for_lookup
, INSERT
);
7604 tu_group
= (struct type_unit_group
*) *slot
;
7605 gdb_assert (tu_group
!= NULL
);
7609 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7610 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7612 ++tu_stats
->nr_symtabs
;
7618 /* Partial symbol tables. */
7620 /* Create a psymtab named NAME and assign it to PER_CU.
7622 The caller must fill in the following details:
7623 dirname, textlow, texthigh. */
7625 static dwarf2_psymtab
*
7626 create_partial_symtab (dwarf2_per_cu_data
*per_cu
,
7627 dwarf2_per_objfile
*per_objfile
,
7630 struct objfile
*objfile
= per_objfile
->objfile
;
7631 dwarf2_psymtab
*pst
;
7633 pst
= new dwarf2_psymtab (name
, objfile
, per_cu
);
7635 pst
->psymtabs_addrmap_supported
= true;
7637 /* This is the glue that links PST into GDB's symbol API. */
7638 per_cu
->v
.psymtab
= pst
;
7643 /* DIE reader function for process_psymtab_comp_unit. */
7646 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7647 const gdb_byte
*info_ptr
,
7648 struct die_info
*comp_unit_die
,
7649 enum language pretend_language
)
7651 struct dwarf2_cu
*cu
= reader
->cu
;
7652 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
7653 struct objfile
*objfile
= per_objfile
->objfile
;
7654 struct gdbarch
*gdbarch
= objfile
->arch ();
7655 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7657 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7658 dwarf2_psymtab
*pst
;
7659 enum pc_bounds_kind cu_bounds_kind
;
7660 const char *filename
;
7662 gdb_assert (! per_cu
->is_debug_types
);
7664 prepare_one_comp_unit (cu
, comp_unit_die
, pretend_language
);
7666 /* Allocate a new partial symbol table structure. */
7667 gdb::unique_xmalloc_ptr
<char> debug_filename
;
7668 static const char artificial
[] = "<artificial>";
7669 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7670 if (filename
== NULL
)
7672 else if (strcmp (filename
, artificial
) == 0)
7674 debug_filename
.reset (concat (artificial
, "@",
7675 sect_offset_str (per_cu
->sect_off
),
7677 filename
= debug_filename
.get ();
7680 pst
= create_partial_symtab (per_cu
, per_objfile
, filename
);
7682 /* This must be done before calling dwarf2_build_include_psymtabs. */
7683 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7685 baseaddr
= objfile
->text_section_offset ();
7687 dwarf2_find_base_address (comp_unit_die
, cu
);
7689 /* Possibly set the default values of LOWPC and HIGHPC from
7691 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7692 &best_highpc
, cu
, pst
);
7693 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7696 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
7699 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
7701 /* Store the contiguous range if it is not empty; it can be
7702 empty for CUs with no code. */
7703 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
7707 /* Check if comp unit has_children.
7708 If so, read the rest of the partial symbols from this comp unit.
7709 If not, there's no more debug_info for this comp unit. */
7710 if (comp_unit_die
->has_children
)
7712 struct partial_die_info
*first_die
;
7713 CORE_ADDR lowpc
, highpc
;
7715 lowpc
= ((CORE_ADDR
) -1);
7716 highpc
= ((CORE_ADDR
) 0);
7718 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7720 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7721 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7723 /* If we didn't find a lowpc, set it to highpc to avoid
7724 complaints from `maint check'. */
7725 if (lowpc
== ((CORE_ADDR
) -1))
7728 /* If the compilation unit didn't have an explicit address range,
7729 then use the information extracted from its child dies. */
7730 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7733 best_highpc
= highpc
;
7736 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
7737 best_lowpc
+ baseaddr
)
7739 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
7740 best_highpc
+ baseaddr
)
7745 if (!cu
->per_cu
->imported_symtabs_empty ())
7748 int len
= cu
->per_cu
->imported_symtabs_size ();
7750 /* Fill in 'dependencies' here; we fill in 'users' in a
7752 pst
->number_of_dependencies
= len
;
7754 = objfile
->partial_symtabs
->allocate_dependencies (len
);
7755 for (i
= 0; i
< len
; ++i
)
7757 pst
->dependencies
[i
]
7758 = cu
->per_cu
->imported_symtabs
->at (i
)->v
.psymtab
;
7761 cu
->per_cu
->imported_symtabs_free ();
7764 /* Get the list of files included in the current compilation unit,
7765 and build a psymtab for each of them. */
7766 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
7768 dwarf_read_debug_printf ("Psymtab for %s unit @%s: %s - %s"
7769 ", %d global, %d static syms",
7770 per_cu
->is_debug_types
? "type" : "comp",
7771 sect_offset_str (per_cu
->sect_off
),
7772 paddress (gdbarch
, pst
->text_low (objfile
)),
7773 paddress (gdbarch
, pst
->text_high (objfile
)),
7774 (int) pst
->global_psymbols
.size (),
7775 (int) pst
->static_psymbols
.size ());
7778 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7779 Process compilation unit THIS_CU for a psymtab. */
7782 process_psymtab_comp_unit (dwarf2_per_cu_data
*this_cu
,
7783 dwarf2_per_objfile
*per_objfile
,
7784 bool want_partial_unit
,
7785 enum language pretend_language
)
7787 /* If this compilation unit was already read in, free the
7788 cached copy in order to read it in again. This is
7789 necessary because we skipped some symbols when we first
7790 read in the compilation unit (see load_partial_dies).
7791 This problem could be avoided, but the benefit is unclear. */
7792 per_objfile
->remove_cu (this_cu
);
7794 cutu_reader
reader (this_cu
, per_objfile
, nullptr, nullptr, false);
7796 switch (reader
.comp_unit_die
->tag
)
7798 case DW_TAG_compile_unit
:
7799 this_cu
->unit_type
= DW_UT_compile
;
7801 case DW_TAG_partial_unit
:
7802 this_cu
->unit_type
= DW_UT_partial
;
7812 else if (this_cu
->is_debug_types
)
7813 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7814 reader
.comp_unit_die
);
7815 else if (want_partial_unit
7816 || reader
.comp_unit_die
->tag
!= DW_TAG_partial_unit
)
7817 process_psymtab_comp_unit_reader (&reader
, reader
.info_ptr
,
7818 reader
.comp_unit_die
,
7821 this_cu
->lang
= reader
.cu
->language
;
7823 /* Age out any secondary CUs. */
7824 per_objfile
->age_comp_units ();
7827 /* Reader function for build_type_psymtabs. */
7830 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
7831 const gdb_byte
*info_ptr
,
7832 struct die_info
*type_unit_die
)
7834 dwarf2_per_objfile
*per_objfile
= reader
->cu
->per_objfile
;
7835 struct dwarf2_cu
*cu
= reader
->cu
;
7836 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7837 struct signatured_type
*sig_type
;
7838 struct type_unit_group
*tu_group
;
7839 struct attribute
*attr
;
7840 struct partial_die_info
*first_die
;
7841 CORE_ADDR lowpc
, highpc
;
7842 dwarf2_psymtab
*pst
;
7844 gdb_assert (per_cu
->is_debug_types
);
7845 sig_type
= (struct signatured_type
*) per_cu
;
7847 if (! type_unit_die
->has_children
)
7850 attr
= type_unit_die
->attr (DW_AT_stmt_list
);
7851 tu_group
= get_type_unit_group (cu
, attr
);
7853 if (tu_group
->tus
== nullptr)
7854 tu_group
->tus
= new std::vector
<signatured_type
*>;
7855 tu_group
->tus
->push_back (sig_type
);
7857 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
7858 pst
= create_partial_symtab (per_cu
, per_objfile
, "");
7859 pst
->anonymous
= true;
7861 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7863 lowpc
= (CORE_ADDR
) -1;
7864 highpc
= (CORE_ADDR
) 0;
7865 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
7870 /* Struct used to sort TUs by their abbreviation table offset. */
7872 struct tu_abbrev_offset
7874 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
7875 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
7878 signatured_type
*sig_type
;
7879 sect_offset abbrev_offset
;
7882 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
7885 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
7886 const struct tu_abbrev_offset
&b
)
7888 return a
.abbrev_offset
< b
.abbrev_offset
;
7891 /* Efficiently read all the type units.
7892 This does the bulk of the work for build_type_psymtabs.
7894 The efficiency is because we sort TUs by the abbrev table they use and
7895 only read each abbrev table once. In one program there are 200K TUs
7896 sharing 8K abbrev tables.
7898 The main purpose of this function is to support building the
7899 dwarf2_per_objfile->per_bfd->type_unit_groups table.
7900 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
7901 can collapse the search space by grouping them by stmt_list.
7902 The savings can be significant, in the same program from above the 200K TUs
7903 share 8K stmt_list tables.
7905 FUNC is expected to call get_type_unit_group, which will create the
7906 struct type_unit_group if necessary and add it to
7907 dwarf2_per_objfile->per_bfd->type_unit_groups. */
7910 build_type_psymtabs_1 (dwarf2_per_objfile
*per_objfile
)
7912 struct tu_stats
*tu_stats
= &per_objfile
->per_bfd
->tu_stats
;
7913 abbrev_table_up abbrev_table
;
7914 sect_offset abbrev_offset
;
7916 /* It's up to the caller to not call us multiple times. */
7917 gdb_assert (per_objfile
->per_bfd
->type_unit_groups
== NULL
);
7919 if (per_objfile
->per_bfd
->all_type_units
.empty ())
7922 /* TUs typically share abbrev tables, and there can be way more TUs than
7923 abbrev tables. Sort by abbrev table to reduce the number of times we
7924 read each abbrev table in.
7925 Alternatives are to punt or to maintain a cache of abbrev tables.
7926 This is simpler and efficient enough for now.
7928 Later we group TUs by their DW_AT_stmt_list value (as this defines the
7929 symtab to use). Typically TUs with the same abbrev offset have the same
7930 stmt_list value too so in practice this should work well.
7932 The basic algorithm here is:
7934 sort TUs by abbrev table
7935 for each TU with same abbrev table:
7936 read abbrev table if first user
7937 read TU top level DIE
7938 [IWBN if DWO skeletons had DW_AT_stmt_list]
7941 dwarf_read_debug_printf ("Building type unit groups ...");
7943 /* Sort in a separate table to maintain the order of all_type_units
7944 for .gdb_index: TU indices directly index all_type_units. */
7945 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
7946 sorted_by_abbrev
.reserve (per_objfile
->per_bfd
->all_type_units
.size ());
7948 for (signatured_type
*sig_type
: per_objfile
->per_bfd
->all_type_units
)
7949 sorted_by_abbrev
.emplace_back
7950 (sig_type
, read_abbrev_offset (per_objfile
, sig_type
->per_cu
.section
,
7951 sig_type
->per_cu
.sect_off
));
7953 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
7954 sort_tu_by_abbrev_offset
);
7956 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
7958 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
7960 /* Switch to the next abbrev table if necessary. */
7961 if (abbrev_table
== NULL
7962 || tu
.abbrev_offset
!= abbrev_offset
)
7964 abbrev_offset
= tu
.abbrev_offset
;
7965 per_objfile
->per_bfd
->abbrev
.read (per_objfile
->objfile
);
7967 abbrev_table::read (&per_objfile
->per_bfd
->abbrev
, abbrev_offset
);
7968 ++tu_stats
->nr_uniq_abbrev_tables
;
7971 cutu_reader
reader (&tu
.sig_type
->per_cu
, per_objfile
,
7972 abbrev_table
.get (), nullptr, false);
7973 if (!reader
.dummy_p
)
7974 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7975 reader
.comp_unit_die
);
7979 /* Print collected type unit statistics. */
7982 print_tu_stats (dwarf2_per_objfile
*per_objfile
)
7984 struct tu_stats
*tu_stats
= &per_objfile
->per_bfd
->tu_stats
;
7986 dwarf_read_debug_printf ("Type unit statistics:");
7987 dwarf_read_debug_printf (" %zu TUs",
7988 per_objfile
->per_bfd
->all_type_units
.size ());
7989 dwarf_read_debug_printf (" %d uniq abbrev tables",
7990 tu_stats
->nr_uniq_abbrev_tables
);
7991 dwarf_read_debug_printf (" %d symtabs from stmt_list entries",
7992 tu_stats
->nr_symtabs
);
7993 dwarf_read_debug_printf (" %d symtab sharers",
7994 tu_stats
->nr_symtab_sharers
);
7995 dwarf_read_debug_printf (" %d type units without a stmt_list",
7996 tu_stats
->nr_stmt_less_type_units
);
7997 dwarf_read_debug_printf (" %d all_type_units reallocs",
7998 tu_stats
->nr_all_type_units_reallocs
);
8001 /* Traversal function for build_type_psymtabs. */
8004 build_type_psymtab_dependencies (void **slot
, void *info
)
8006 dwarf2_per_objfile
*per_objfile
= (dwarf2_per_objfile
*) info
;
8007 struct objfile
*objfile
= per_objfile
->objfile
;
8008 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
8009 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
8010 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
8011 int len
= (tu_group
->tus
== nullptr) ? 0 : tu_group
->tus
->size ();
8014 gdb_assert (len
> 0);
8015 gdb_assert (per_cu
->type_unit_group_p ());
8017 pst
->number_of_dependencies
= len
;
8018 pst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (len
);
8019 for (i
= 0; i
< len
; ++i
)
8021 struct signatured_type
*iter
= tu_group
->tus
->at (i
);
8022 gdb_assert (iter
->per_cu
.is_debug_types
);
8023 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
8024 iter
->type_unit_group
= tu_group
;
8027 delete tu_group
->tus
;
8028 tu_group
->tus
= nullptr;
8033 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8034 Build partial symbol tables for the .debug_types comp-units. */
8037 build_type_psymtabs (dwarf2_per_objfile
*per_objfile
)
8039 if (! create_all_type_units (per_objfile
))
8042 build_type_psymtabs_1 (per_objfile
);
8045 /* Traversal function for process_skeletonless_type_unit.
8046 Read a TU in a DWO file and build partial symbols for it. */
8049 process_skeletonless_type_unit (void **slot
, void *info
)
8051 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
8052 dwarf2_per_objfile
*per_objfile
= (dwarf2_per_objfile
*) info
;
8053 struct signatured_type find_entry
, *entry
;
8055 /* If this TU doesn't exist in the global table, add it and read it in. */
8057 if (per_objfile
->per_bfd
->signatured_types
== NULL
)
8058 per_objfile
->per_bfd
->signatured_types
= allocate_signatured_type_table ();
8060 find_entry
.signature
= dwo_unit
->signature
;
8061 slot
= htab_find_slot (per_objfile
->per_bfd
->signatured_types
.get (),
8062 &find_entry
, INSERT
);
8063 /* If we've already seen this type there's nothing to do. What's happening
8064 is we're doing our own version of comdat-folding here. */
8068 /* This does the job that create_all_type_units would have done for
8070 entry
= add_type_unit (per_objfile
, dwo_unit
->signature
, slot
);
8071 fill_in_sig_entry_from_dwo_entry (per_objfile
, entry
, dwo_unit
);
8074 /* This does the job that build_type_psymtabs_1 would have done. */
8075 cutu_reader
reader (&entry
->per_cu
, per_objfile
, nullptr, nullptr, false);
8076 if (!reader
.dummy_p
)
8077 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
8078 reader
.comp_unit_die
);
8083 /* Traversal function for process_skeletonless_type_units. */
8086 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
8088 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
8090 if (dwo_file
->tus
!= NULL
)
8091 htab_traverse_noresize (dwo_file
->tus
.get (),
8092 process_skeletonless_type_unit
, info
);
8097 /* Scan all TUs of DWO files, verifying we've processed them.
8098 This is needed in case a TU was emitted without its skeleton.
8099 Note: This can't be done until we know what all the DWO files are. */
8102 process_skeletonless_type_units (dwarf2_per_objfile
*per_objfile
)
8104 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
8105 if (get_dwp_file (per_objfile
) == NULL
8106 && per_objfile
->per_bfd
->dwo_files
!= NULL
)
8108 htab_traverse_noresize (per_objfile
->per_bfd
->dwo_files
.get (),
8109 process_dwo_file_for_skeletonless_type_units
,
8114 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
8117 set_partial_user (dwarf2_per_objfile
*per_objfile
)
8119 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
8121 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
8126 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
8128 /* Set the 'user' field only if it is not already set. */
8129 if (pst
->dependencies
[j
]->user
== NULL
)
8130 pst
->dependencies
[j
]->user
= pst
;
8135 /* Build the partial symbol table by doing a quick pass through the
8136 .debug_info and .debug_abbrev sections. */
8139 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
*per_objfile
)
8141 struct objfile
*objfile
= per_objfile
->objfile
;
8143 dwarf_read_debug_printf ("Building psymtabs of objfile %s ...",
8144 objfile_name (objfile
));
8146 scoped_restore restore_reading_psyms
8147 = make_scoped_restore (&per_objfile
->per_bfd
->reading_partial_symbols
,
8150 per_objfile
->per_bfd
->info
.read (objfile
);
8152 /* Any cached compilation units will be linked by the per-objfile
8153 read_in_chain. Make sure to free them when we're done. */
8154 free_cached_comp_units
freer (per_objfile
);
8156 build_type_psymtabs (per_objfile
);
8158 create_all_comp_units (per_objfile
);
8160 /* Create a temporary address map on a temporary obstack. We later
8161 copy this to the final obstack. */
8162 auto_obstack temp_obstack
;
8164 scoped_restore save_psymtabs_addrmap
8165 = make_scoped_restore (&objfile
->partial_symtabs
->psymtabs_addrmap
,
8166 addrmap_create_mutable (&temp_obstack
));
8168 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
8170 if (per_cu
->v
.psymtab
!= NULL
)
8171 /* In case a forward DW_TAG_imported_unit has read the CU already. */
8173 process_psymtab_comp_unit (per_cu
, per_objfile
, false,
8177 /* This has to wait until we read the CUs, we need the list of DWOs. */
8178 process_skeletonless_type_units (per_objfile
);
8180 /* Now that all TUs have been processed we can fill in the dependencies. */
8181 if (per_objfile
->per_bfd
->type_unit_groups
!= NULL
)
8183 htab_traverse_noresize (per_objfile
->per_bfd
->type_unit_groups
.get (),
8184 build_type_psymtab_dependencies
, per_objfile
);
8187 if (dwarf_read_debug
> 0)
8188 print_tu_stats (per_objfile
);
8190 set_partial_user (per_objfile
);
8192 objfile
->partial_symtabs
->psymtabs_addrmap
8193 = addrmap_create_fixed (objfile
->partial_symtabs
->psymtabs_addrmap
,
8194 objfile
->partial_symtabs
->obstack ());
8195 /* At this point we want to keep the address map. */
8196 save_psymtabs_addrmap
.release ();
8198 dwarf_read_debug_printf ("Done building psymtabs of %s",
8199 objfile_name (objfile
));
8202 /* Load the partial DIEs for a secondary CU into memory.
8203 This is also used when rereading a primary CU with load_all_dies. */
8206 load_partial_comp_unit (dwarf2_per_cu_data
*this_cu
,
8207 dwarf2_per_objfile
*per_objfile
,
8208 dwarf2_cu
*existing_cu
)
8210 cutu_reader
reader (this_cu
, per_objfile
, nullptr, existing_cu
, false);
8212 if (!reader
.dummy_p
)
8214 prepare_one_comp_unit (reader
.cu
, reader
.comp_unit_die
,
8217 /* Check if comp unit has_children.
8218 If so, read the rest of the partial symbols from this comp unit.
8219 If not, there's no more debug_info for this comp unit. */
8220 if (reader
.comp_unit_die
->has_children
)
8221 load_partial_dies (&reader
, reader
.info_ptr
, 0);
8228 read_comp_units_from_section (dwarf2_per_objfile
*per_objfile
,
8229 struct dwarf2_section_info
*section
,
8230 struct dwarf2_section_info
*abbrev_section
,
8231 unsigned int is_dwz
)
8233 const gdb_byte
*info_ptr
;
8234 struct objfile
*objfile
= per_objfile
->objfile
;
8236 dwarf_read_debug_printf ("Reading %s for %s",
8237 section
->get_name (),
8238 section
->get_file_name ());
8240 section
->read (objfile
);
8242 info_ptr
= section
->buffer
;
8244 while (info_ptr
< section
->buffer
+ section
->size
)
8246 struct dwarf2_per_cu_data
*this_cu
;
8248 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
8250 comp_unit_head cu_header
;
8251 read_and_check_comp_unit_head (per_objfile
, &cu_header
, section
,
8252 abbrev_section
, info_ptr
,
8253 rcuh_kind::COMPILE
);
8255 /* Save the compilation unit for later lookup. */
8256 if (cu_header
.unit_type
!= DW_UT_type
)
8257 this_cu
= per_objfile
->per_bfd
->allocate_per_cu ();
8260 auto sig_type
= per_objfile
->per_bfd
->allocate_signatured_type ();
8261 sig_type
->signature
= cu_header
.signature
;
8262 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
8263 this_cu
= &sig_type
->per_cu
;
8265 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
8266 this_cu
->sect_off
= sect_off
;
8267 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
8268 this_cu
->is_dwz
= is_dwz
;
8269 this_cu
->section
= section
;
8271 per_objfile
->per_bfd
->all_comp_units
.push_back (this_cu
);
8273 info_ptr
= info_ptr
+ this_cu
->length
;
8277 /* Create a list of all compilation units in OBJFILE.
8278 This is only done for -readnow and building partial symtabs. */
8281 create_all_comp_units (dwarf2_per_objfile
*per_objfile
)
8283 gdb_assert (per_objfile
->per_bfd
->all_comp_units
.empty ());
8284 read_comp_units_from_section (per_objfile
, &per_objfile
->per_bfd
->info
,
8285 &per_objfile
->per_bfd
->abbrev
, 0);
8287 dwz_file
*dwz
= dwarf2_get_dwz_file (per_objfile
->per_bfd
);
8289 read_comp_units_from_section (per_objfile
, &dwz
->info
, &dwz
->abbrev
, 1);
8292 /* Process all loaded DIEs for compilation unit CU, starting at
8293 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8294 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8295 DW_AT_ranges). See the comments of add_partial_subprogram on how
8296 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8299 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8300 CORE_ADDR
*highpc
, int set_addrmap
,
8301 struct dwarf2_cu
*cu
)
8303 struct partial_die_info
*pdi
;
8305 /* Now, march along the PDI's, descending into ones which have
8306 interesting children but skipping the children of the other ones,
8307 until we reach the end of the compilation unit. */
8315 /* Anonymous namespaces or modules have no name but have interesting
8316 children, so we need to look at them. Ditto for anonymous
8319 if (pdi
->raw_name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8320 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8321 || pdi
->tag
== DW_TAG_imported_unit
8322 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8326 case DW_TAG_subprogram
:
8327 case DW_TAG_inlined_subroutine
:
8328 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8329 if (cu
->language
== language_cplus
)
8330 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8333 case DW_TAG_constant
:
8334 case DW_TAG_variable
:
8335 case DW_TAG_typedef
:
8336 case DW_TAG_union_type
:
8337 if (!pdi
->is_declaration
8338 || (pdi
->tag
== DW_TAG_variable
&& pdi
->is_external
))
8340 add_partial_symbol (pdi
, cu
);
8343 case DW_TAG_class_type
:
8344 case DW_TAG_interface_type
:
8345 case DW_TAG_structure_type
:
8346 if (!pdi
->is_declaration
)
8348 add_partial_symbol (pdi
, cu
);
8350 if ((cu
->language
== language_rust
8351 || cu
->language
== language_cplus
) && pdi
->has_children
)
8352 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8355 case DW_TAG_enumeration_type
:
8356 if (!pdi
->is_declaration
)
8357 add_partial_enumeration (pdi
, cu
);
8359 case DW_TAG_base_type
:
8360 case DW_TAG_subrange_type
:
8361 /* File scope base type definitions are added to the partial
8363 add_partial_symbol (pdi
, cu
);
8365 case DW_TAG_namespace
:
8366 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8369 if (!pdi
->is_declaration
)
8370 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8372 case DW_TAG_imported_unit
:
8374 struct dwarf2_per_cu_data
*per_cu
;
8376 /* For now we don't handle imported units in type units. */
8377 if (cu
->per_cu
->is_debug_types
)
8379 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8380 " supported in type units [in module %s]"),
8381 objfile_name (cu
->per_objfile
->objfile
));
8384 per_cu
= dwarf2_find_containing_comp_unit
8385 (pdi
->d
.sect_off
, pdi
->is_dwz
, cu
->per_objfile
);
8387 /* Go read the partial unit, if needed. */
8388 if (per_cu
->v
.psymtab
== NULL
)
8389 process_psymtab_comp_unit (per_cu
, cu
->per_objfile
, true,
8392 cu
->per_cu
->imported_symtabs_push (per_cu
);
8395 case DW_TAG_imported_declaration
:
8396 add_partial_symbol (pdi
, cu
);
8403 /* If the die has a sibling, skip to the sibling. */
8405 pdi
= pdi
->die_sibling
;
8409 /* Functions used to compute the fully scoped name of a partial DIE.
8411 Normally, this is simple. For C++, the parent DIE's fully scoped
8412 name is concatenated with "::" and the partial DIE's name.
8413 Enumerators are an exception; they use the scope of their parent
8414 enumeration type, i.e. the name of the enumeration type is not
8415 prepended to the enumerator.
8417 There are two complexities. One is DW_AT_specification; in this
8418 case "parent" means the parent of the target of the specification,
8419 instead of the direct parent of the DIE. The other is compilers
8420 which do not emit DW_TAG_namespace; in this case we try to guess
8421 the fully qualified name of structure types from their members'
8422 linkage names. This must be done using the DIE's children rather
8423 than the children of any DW_AT_specification target. We only need
8424 to do this for structures at the top level, i.e. if the target of
8425 any DW_AT_specification (if any; otherwise the DIE itself) does not
8428 /* Compute the scope prefix associated with PDI's parent, in
8429 compilation unit CU. The result will be allocated on CU's
8430 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8431 field. NULL is returned if no prefix is necessary. */
8433 partial_die_parent_scope (struct partial_die_info
*pdi
,
8434 struct dwarf2_cu
*cu
)
8436 const char *grandparent_scope
;
8437 struct partial_die_info
*parent
, *real_pdi
;
8439 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8440 then this means the parent of the specification DIE. */
8443 while (real_pdi
->has_specification
)
8445 auto res
= find_partial_die (real_pdi
->spec_offset
,
8446 real_pdi
->spec_is_dwz
, cu
);
8451 parent
= real_pdi
->die_parent
;
8455 if (parent
->scope_set
)
8456 return parent
->scope
;
8460 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8462 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8463 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8464 Work around this problem here. */
8465 if (cu
->language
== language_cplus
8466 && parent
->tag
== DW_TAG_namespace
8467 && strcmp (parent
->name (cu
), "::") == 0
8468 && grandparent_scope
== NULL
)
8470 parent
->scope
= NULL
;
8471 parent
->scope_set
= 1;
8475 /* Nested subroutines in Fortran get a prefix. */
8476 if (pdi
->tag
== DW_TAG_enumerator
)
8477 /* Enumerators should not get the name of the enumeration as a prefix. */
8478 parent
->scope
= grandparent_scope
;
8479 else if (parent
->tag
== DW_TAG_namespace
8480 || parent
->tag
== DW_TAG_module
8481 || parent
->tag
== DW_TAG_structure_type
8482 || parent
->tag
== DW_TAG_class_type
8483 || parent
->tag
== DW_TAG_interface_type
8484 || parent
->tag
== DW_TAG_union_type
8485 || parent
->tag
== DW_TAG_enumeration_type
8486 || (cu
->language
== language_fortran
8487 && parent
->tag
== DW_TAG_subprogram
8488 && pdi
->tag
== DW_TAG_subprogram
))
8490 if (grandparent_scope
== NULL
)
8491 parent
->scope
= parent
->name (cu
);
8493 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8495 parent
->name (cu
), 0, cu
);
8499 /* FIXME drow/2004-04-01: What should we be doing with
8500 function-local names? For partial symbols, we should probably be
8502 complaint (_("unhandled containing DIE tag %s for DIE at %s"),
8503 dwarf_tag_name (parent
->tag
),
8504 sect_offset_str (pdi
->sect_off
));
8505 parent
->scope
= grandparent_scope
;
8508 parent
->scope_set
= 1;
8509 return parent
->scope
;
8512 /* Return the fully scoped name associated with PDI, from compilation unit
8513 CU. The result will be allocated with malloc. */
8515 static gdb::unique_xmalloc_ptr
<char>
8516 partial_die_full_name (struct partial_die_info
*pdi
,
8517 struct dwarf2_cu
*cu
)
8519 const char *parent_scope
;
8521 /* If this is a template instantiation, we can not work out the
8522 template arguments from partial DIEs. So, unfortunately, we have
8523 to go through the full DIEs. At least any work we do building
8524 types here will be reused if full symbols are loaded later. */
8525 if (pdi
->has_template_arguments
)
8529 if (pdi
->name (cu
) != NULL
&& strchr (pdi
->name (cu
), '<') == NULL
)
8531 struct die_info
*die
;
8532 struct attribute attr
;
8533 struct dwarf2_cu
*ref_cu
= cu
;
8535 /* DW_FORM_ref_addr is using section offset. */
8536 attr
.name
= (enum dwarf_attribute
) 0;
8537 attr
.form
= DW_FORM_ref_addr
;
8538 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8539 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8541 return make_unique_xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8545 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8546 if (parent_scope
== NULL
)
8549 return gdb::unique_xmalloc_ptr
<char> (typename_concat (NULL
, parent_scope
,
8555 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8557 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
8558 struct objfile
*objfile
= per_objfile
->objfile
;
8559 struct gdbarch
*gdbarch
= objfile
->arch ();
8561 const char *actual_name
= NULL
;
8564 baseaddr
= objfile
->text_section_offset ();
8566 gdb::unique_xmalloc_ptr
<char> built_actual_name
8567 = partial_die_full_name (pdi
, cu
);
8568 if (built_actual_name
!= NULL
)
8569 actual_name
= built_actual_name
.get ();
8571 if (actual_name
== NULL
)
8572 actual_name
= pdi
->name (cu
);
8574 partial_symbol psymbol
;
8575 memset (&psymbol
, 0, sizeof (psymbol
));
8576 psymbol
.ginfo
.set_language (cu
->language
, &objfile
->objfile_obstack
);
8577 psymbol
.ginfo
.section
= -1;
8579 /* The code below indicates that the psymbol should be installed by
8581 gdb::optional
<psymbol_placement
> where
;
8585 case DW_TAG_inlined_subroutine
:
8586 case DW_TAG_subprogram
:
8587 addr
= (gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
)
8589 if (pdi
->is_external
8590 || cu
->language
== language_ada
8591 || (cu
->language
== language_fortran
8592 && pdi
->die_parent
!= NULL
8593 && pdi
->die_parent
->tag
== DW_TAG_subprogram
))
8595 /* Normally, only "external" DIEs are part of the global scope.
8596 But in Ada and Fortran, we want to be able to access nested
8597 procedures globally. So all Ada and Fortran subprograms are
8598 stored in the global scope. */
8599 where
= psymbol_placement::GLOBAL
;
8602 where
= psymbol_placement::STATIC
;
8604 psymbol
.domain
= VAR_DOMAIN
;
8605 psymbol
.aclass
= LOC_BLOCK
;
8606 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8607 psymbol
.ginfo
.value
.address
= addr
;
8609 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8610 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8612 case DW_TAG_constant
:
8613 psymbol
.domain
= VAR_DOMAIN
;
8614 psymbol
.aclass
= LOC_STATIC
;
8615 where
= (pdi
->is_external
8616 ? psymbol_placement::GLOBAL
8617 : psymbol_placement::STATIC
);
8619 case DW_TAG_variable
:
8621 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8625 && !per_objfile
->per_bfd
->has_section_at_zero
)
8627 /* A global or static variable may also have been stripped
8628 out by the linker if unused, in which case its address
8629 will be nullified; do not add such variables into partial
8630 symbol table then. */
8632 else if (pdi
->is_external
)
8635 Don't enter into the minimal symbol tables as there is
8636 a minimal symbol table entry from the ELF symbols already.
8637 Enter into partial symbol table if it has a location
8638 descriptor or a type.
8639 If the location descriptor is missing, new_symbol will create
8640 a LOC_UNRESOLVED symbol, the address of the variable will then
8641 be determined from the minimal symbol table whenever the variable
8643 The address for the partial symbol table entry is not
8644 used by GDB, but it comes in handy for debugging partial symbol
8647 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8649 psymbol
.domain
= VAR_DOMAIN
;
8650 psymbol
.aclass
= LOC_STATIC
;
8651 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8652 psymbol
.ginfo
.value
.address
= addr
;
8653 where
= psymbol_placement::GLOBAL
;
8658 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8660 /* Static Variable. Skip symbols whose value we cannot know (those
8661 without location descriptors or constant values). */
8662 if (!has_loc
&& !pdi
->has_const_value
)
8665 psymbol
.domain
= VAR_DOMAIN
;
8666 psymbol
.aclass
= LOC_STATIC
;
8667 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8669 psymbol
.ginfo
.value
.address
= addr
;
8670 where
= psymbol_placement::STATIC
;
8673 case DW_TAG_array_type
:
8674 case DW_TAG_typedef
:
8675 case DW_TAG_base_type
:
8676 case DW_TAG_subrange_type
:
8677 psymbol
.domain
= VAR_DOMAIN
;
8678 psymbol
.aclass
= LOC_TYPEDEF
;
8679 where
= psymbol_placement::STATIC
;
8681 case DW_TAG_imported_declaration
:
8682 case DW_TAG_namespace
:
8683 psymbol
.domain
= VAR_DOMAIN
;
8684 psymbol
.aclass
= LOC_TYPEDEF
;
8685 where
= psymbol_placement::GLOBAL
;
8688 /* With Fortran 77 there might be a "BLOCK DATA" module
8689 available without any name. If so, we skip the module as it
8690 doesn't bring any value. */
8691 if (actual_name
!= nullptr)
8693 psymbol
.domain
= MODULE_DOMAIN
;
8694 psymbol
.aclass
= LOC_TYPEDEF
;
8695 where
= psymbol_placement::GLOBAL
;
8698 case DW_TAG_class_type
:
8699 case DW_TAG_interface_type
:
8700 case DW_TAG_structure_type
:
8701 case DW_TAG_union_type
:
8702 case DW_TAG_enumeration_type
:
8703 /* Skip external references. The DWARF standard says in the section
8704 about "Structure, Union, and Class Type Entries": "An incomplete
8705 structure, union or class type is represented by a structure,
8706 union or class entry that does not have a byte size attribute
8707 and that has a DW_AT_declaration attribute." */
8708 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8711 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8712 static vs. global. */
8713 psymbol
.domain
= STRUCT_DOMAIN
;
8714 psymbol
.aclass
= LOC_TYPEDEF
;
8715 where
= (cu
->language
== language_cplus
8716 ? psymbol_placement::GLOBAL
8717 : psymbol_placement::STATIC
);
8719 case DW_TAG_enumerator
:
8720 psymbol
.domain
= VAR_DOMAIN
;
8721 psymbol
.aclass
= LOC_CONST
;
8722 where
= (cu
->language
== language_cplus
8723 ? psymbol_placement::GLOBAL
8724 : psymbol_placement::STATIC
);
8730 if (where
.has_value ())
8732 if (built_actual_name
!= nullptr)
8733 actual_name
= objfile
->intern (actual_name
);
8734 if (pdi
->linkage_name
== nullptr || cu
->language
== language_ada
)
8735 psymbol
.ginfo
.set_linkage_name (actual_name
);
8738 psymbol
.ginfo
.set_demangled_name (actual_name
,
8739 &objfile
->objfile_obstack
);
8740 psymbol
.ginfo
.set_linkage_name (pdi
->linkage_name
);
8742 cu
->per_cu
->v
.psymtab
->add_psymbol (psymbol
, *where
, objfile
);
8746 /* Read a partial die corresponding to a namespace; also, add a symbol
8747 corresponding to that namespace to the symbol table. NAMESPACE is
8748 the name of the enclosing namespace. */
8751 add_partial_namespace (struct partial_die_info
*pdi
,
8752 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8753 int set_addrmap
, struct dwarf2_cu
*cu
)
8755 /* Add a symbol for the namespace. */
8757 add_partial_symbol (pdi
, cu
);
8759 /* Now scan partial symbols in that namespace. */
8761 if (pdi
->has_children
)
8762 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8765 /* Read a partial die corresponding to a Fortran module. */
8768 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
8769 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
8771 /* Add a symbol for the namespace. */
8773 add_partial_symbol (pdi
, cu
);
8775 /* Now scan partial symbols in that module. */
8777 if (pdi
->has_children
)
8778 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8781 /* Read a partial die corresponding to a subprogram or an inlined
8782 subprogram and create a partial symbol for that subprogram.
8783 When the CU language allows it, this routine also defines a partial
8784 symbol for each nested subprogram that this subprogram contains.
8785 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
8786 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
8788 PDI may also be a lexical block, in which case we simply search
8789 recursively for subprograms defined inside that lexical block.
8790 Again, this is only performed when the CU language allows this
8791 type of definitions. */
8794 add_partial_subprogram (struct partial_die_info
*pdi
,
8795 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8796 int set_addrmap
, struct dwarf2_cu
*cu
)
8798 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
8800 if (pdi
->has_pc_info
)
8802 if (pdi
->lowpc
< *lowpc
)
8803 *lowpc
= pdi
->lowpc
;
8804 if (pdi
->highpc
> *highpc
)
8805 *highpc
= pdi
->highpc
;
8808 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
8809 struct gdbarch
*gdbarch
= objfile
->arch ();
8811 CORE_ADDR this_highpc
;
8812 CORE_ADDR this_lowpc
;
8814 baseaddr
= objfile
->text_section_offset ();
8816 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8817 pdi
->lowpc
+ baseaddr
)
8820 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8821 pdi
->highpc
+ baseaddr
)
8823 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
8824 this_lowpc
, this_highpc
- 1,
8825 cu
->per_cu
->v
.psymtab
);
8829 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
8831 if (!pdi
->is_declaration
)
8832 /* Ignore subprogram DIEs that do not have a name, they are
8833 illegal. Do not emit a complaint at this point, we will
8834 do so when we convert this psymtab into a symtab. */
8836 add_partial_symbol (pdi
, cu
);
8840 if (! pdi
->has_children
)
8843 if (cu
->language
== language_ada
|| cu
->language
== language_fortran
)
8845 pdi
= pdi
->die_child
;
8849 if (pdi
->tag
== DW_TAG_subprogram
8850 || pdi
->tag
== DW_TAG_inlined_subroutine
8851 || pdi
->tag
== DW_TAG_lexical_block
)
8852 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8853 pdi
= pdi
->die_sibling
;
8858 /* Read a partial die corresponding to an enumeration type. */
8861 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
8862 struct dwarf2_cu
*cu
)
8864 struct partial_die_info
*pdi
;
8866 if (enum_pdi
->name (cu
) != NULL
)
8867 add_partial_symbol (enum_pdi
, cu
);
8869 pdi
= enum_pdi
->die_child
;
8872 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->raw_name
== NULL
)
8873 complaint (_("malformed enumerator DIE ignored"));
8875 add_partial_symbol (pdi
, cu
);
8876 pdi
= pdi
->die_sibling
;
8880 /* Return the initial uleb128 in the die at INFO_PTR. */
8883 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
8885 unsigned int bytes_read
;
8887 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8890 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
8891 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
8893 Return the corresponding abbrev, or NULL if the number is zero (indicating
8894 an empty DIE). In either case *BYTES_READ will be set to the length of
8895 the initial number. */
8897 static struct abbrev_info
*
8898 peek_die_abbrev (const die_reader_specs
&reader
,
8899 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
8901 dwarf2_cu
*cu
= reader
.cu
;
8902 bfd
*abfd
= cu
->per_objfile
->objfile
->obfd
;
8903 unsigned int abbrev_number
8904 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
8906 if (abbrev_number
== 0)
8909 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
8912 error (_("Dwarf Error: Could not find abbrev number %d in %s"
8913 " at offset %s [in module %s]"),
8914 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
8915 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
8921 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8922 Returns a pointer to the end of a series of DIEs, terminated by an empty
8923 DIE. Any children of the skipped DIEs will also be skipped. */
8925 static const gdb_byte
*
8926 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
8930 unsigned int bytes_read
;
8931 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
8934 return info_ptr
+ bytes_read
;
8936 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
8940 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8941 INFO_PTR should point just after the initial uleb128 of a DIE, and the
8942 abbrev corresponding to that skipped uleb128 should be passed in
8943 ABBREV. Returns a pointer to this DIE's sibling, skipping any
8946 static const gdb_byte
*
8947 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
8948 struct abbrev_info
*abbrev
)
8950 unsigned int bytes_read
;
8951 struct attribute attr
;
8952 bfd
*abfd
= reader
->abfd
;
8953 struct dwarf2_cu
*cu
= reader
->cu
;
8954 const gdb_byte
*buffer
= reader
->buffer
;
8955 const gdb_byte
*buffer_end
= reader
->buffer_end
;
8956 unsigned int form
, i
;
8958 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
8960 /* The only abbrev we care about is DW_AT_sibling. */
8961 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
8963 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
8964 if (attr
.form
== DW_FORM_ref_addr
)
8965 complaint (_("ignoring absolute DW_AT_sibling"));
8968 sect_offset off
= attr
.get_ref_die_offset ();
8969 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
8971 if (sibling_ptr
< info_ptr
)
8972 complaint (_("DW_AT_sibling points backwards"));
8973 else if (sibling_ptr
> reader
->buffer_end
)
8974 reader
->die_section
->overflow_complaint ();
8980 /* If it isn't DW_AT_sibling, skip this attribute. */
8981 form
= abbrev
->attrs
[i
].form
;
8985 case DW_FORM_ref_addr
:
8986 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
8987 and later it is offset sized. */
8988 if (cu
->header
.version
== 2)
8989 info_ptr
+= cu
->header
.addr_size
;
8991 info_ptr
+= cu
->header
.offset_size
;
8993 case DW_FORM_GNU_ref_alt
:
8994 info_ptr
+= cu
->header
.offset_size
;
8997 info_ptr
+= cu
->header
.addr_size
;
9005 case DW_FORM_flag_present
:
9006 case DW_FORM_implicit_const
:
9023 case DW_FORM_ref_sig8
:
9026 case DW_FORM_data16
:
9029 case DW_FORM_string
:
9030 read_direct_string (abfd
, info_ptr
, &bytes_read
);
9031 info_ptr
+= bytes_read
;
9033 case DW_FORM_sec_offset
:
9035 case DW_FORM_GNU_strp_alt
:
9036 info_ptr
+= cu
->header
.offset_size
;
9038 case DW_FORM_exprloc
:
9040 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9041 info_ptr
+= bytes_read
;
9043 case DW_FORM_block1
:
9044 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
9046 case DW_FORM_block2
:
9047 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
9049 case DW_FORM_block4
:
9050 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
9056 case DW_FORM_ref_udata
:
9057 case DW_FORM_GNU_addr_index
:
9058 case DW_FORM_GNU_str_index
:
9059 case DW_FORM_rnglistx
:
9060 case DW_FORM_loclistx
:
9061 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
9063 case DW_FORM_indirect
:
9064 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9065 info_ptr
+= bytes_read
;
9066 /* We need to continue parsing from here, so just go back to
9068 goto skip_attribute
;
9071 error (_("Dwarf Error: Cannot handle %s "
9072 "in DWARF reader [in module %s]"),
9073 dwarf_form_name (form
),
9074 bfd_get_filename (abfd
));
9078 if (abbrev
->has_children
)
9079 return skip_children (reader
, info_ptr
);
9084 /* Locate ORIG_PDI's sibling.
9085 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
9087 static const gdb_byte
*
9088 locate_pdi_sibling (const struct die_reader_specs
*reader
,
9089 struct partial_die_info
*orig_pdi
,
9090 const gdb_byte
*info_ptr
)
9092 /* Do we know the sibling already? */
9094 if (orig_pdi
->sibling
)
9095 return orig_pdi
->sibling
;
9097 /* Are there any children to deal with? */
9099 if (!orig_pdi
->has_children
)
9102 /* Skip the children the long way. */
9104 return skip_children (reader
, info_ptr
);
9107 /* Expand this partial symbol table into a full symbol table. SELF is
9111 dwarf2_psymtab::read_symtab (struct objfile
*objfile
)
9113 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
9115 gdb_assert (!per_objfile
->symtab_set_p (per_cu_data
));
9117 /* If this psymtab is constructed from a debug-only objfile, the
9118 has_section_at_zero flag will not necessarily be correct. We
9119 can get the correct value for this flag by looking at the data
9120 associated with the (presumably stripped) associated objfile. */
9121 if (objfile
->separate_debug_objfile_backlink
)
9123 dwarf2_per_objfile
*per_objfile_backlink
9124 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
9126 per_objfile
->per_bfd
->has_section_at_zero
9127 = per_objfile_backlink
->per_bfd
->has_section_at_zero
;
9130 expand_psymtab (objfile
);
9132 process_cu_includes (per_objfile
);
9135 /* Reading in full CUs. */
9137 /* Add PER_CU to the queue. */
9140 queue_comp_unit (dwarf2_per_cu_data
*per_cu
,
9141 dwarf2_per_objfile
*per_objfile
,
9142 enum language pretend_language
)
9145 per_cu
->per_bfd
->queue
.emplace (per_cu
, per_objfile
, pretend_language
);
9148 /* If PER_CU is not yet queued, add it to the queue.
9149 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
9151 The result is non-zero if PER_CU was queued, otherwise the result is zero
9152 meaning either PER_CU is already queued or it is already loaded.
9154 N.B. There is an invariant here that if a CU is queued then it is loaded.
9155 The caller is required to load PER_CU if we return non-zero. */
9158 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
9159 dwarf2_per_cu_data
*per_cu
,
9160 dwarf2_per_objfile
*per_objfile
,
9161 enum language pretend_language
)
9163 /* We may arrive here during partial symbol reading, if we need full
9164 DIEs to process an unusual case (e.g. template arguments). Do
9165 not queue PER_CU, just tell our caller to load its DIEs. */
9166 if (per_cu
->per_bfd
->reading_partial_symbols
)
9168 dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
9170 if (cu
== NULL
|| cu
->dies
== NULL
)
9175 /* Mark the dependence relation so that we don't flush PER_CU
9177 if (dependent_cu
!= NULL
)
9178 dwarf2_add_dependence (dependent_cu
, per_cu
);
9180 /* If it's already on the queue, we have nothing to do. */
9184 /* If the compilation unit is already loaded, just mark it as
9186 dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
9193 /* Add it to the queue. */
9194 queue_comp_unit (per_cu
, per_objfile
, pretend_language
);
9199 /* Process the queue. */
9202 process_queue (dwarf2_per_objfile
*per_objfile
)
9204 dwarf_read_debug_printf ("Expanding one or more symtabs of objfile %s ...",
9205 objfile_name (per_objfile
->objfile
));
9207 /* The queue starts out with one item, but following a DIE reference
9208 may load a new CU, adding it to the end of the queue. */
9209 while (!per_objfile
->per_bfd
->queue
.empty ())
9211 dwarf2_queue_item
&item
= per_objfile
->per_bfd
->queue
.front ();
9212 dwarf2_per_cu_data
*per_cu
= item
.per_cu
;
9214 if (!per_objfile
->symtab_set_p (per_cu
))
9216 dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
9218 /* Skip dummy CUs. */
9221 unsigned int debug_print_threshold
;
9224 if (per_cu
->is_debug_types
)
9226 struct signatured_type
*sig_type
=
9227 (struct signatured_type
*) per_cu
;
9229 sprintf (buf
, "TU %s at offset %s",
9230 hex_string (sig_type
->signature
),
9231 sect_offset_str (per_cu
->sect_off
));
9232 /* There can be 100s of TUs.
9233 Only print them in verbose mode. */
9234 debug_print_threshold
= 2;
9238 sprintf (buf
, "CU at offset %s",
9239 sect_offset_str (per_cu
->sect_off
));
9240 debug_print_threshold
= 1;
9243 if (dwarf_read_debug
>= debug_print_threshold
)
9244 dwarf_read_debug_printf ("Expanding symtab of %s", buf
);
9246 if (per_cu
->is_debug_types
)
9247 process_full_type_unit (cu
, item
.pretend_language
);
9249 process_full_comp_unit (cu
, item
.pretend_language
);
9251 if (dwarf_read_debug
>= debug_print_threshold
)
9252 dwarf_read_debug_printf ("Done expanding %s", buf
);
9257 per_objfile
->per_bfd
->queue
.pop ();
9260 dwarf_read_debug_printf ("Done expanding symtabs of %s.",
9261 objfile_name (per_objfile
->objfile
));
9264 /* Read in full symbols for PST, and anything it depends on. */
9267 dwarf2_psymtab::expand_psymtab (struct objfile
*objfile
)
9269 gdb_assert (!readin_p (objfile
));
9271 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
9272 free_cached_comp_units
freer (per_objfile
);
9273 expand_dependencies (objfile
);
9275 dw2_do_instantiate_symtab (per_cu_data
, per_objfile
, false);
9276 gdb_assert (get_compunit_symtab (objfile
) != nullptr);
9279 /* See psympriv.h. */
9282 dwarf2_psymtab::readin_p (struct objfile
*objfile
) const
9284 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
9285 return per_objfile
->symtab_set_p (per_cu_data
);
9288 /* See psympriv.h. */
9291 dwarf2_psymtab::get_compunit_symtab (struct objfile
*objfile
) const
9293 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
9294 return per_objfile
->get_symtab (per_cu_data
);
9297 /* Trivial hash function for die_info: the hash value of a DIE
9298 is its offset in .debug_info for this objfile. */
9301 die_hash (const void *item
)
9303 const struct die_info
*die
= (const struct die_info
*) item
;
9305 return to_underlying (die
->sect_off
);
9308 /* Trivial comparison function for die_info structures: two DIEs
9309 are equal if they have the same offset. */
9312 die_eq (const void *item_lhs
, const void *item_rhs
)
9314 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9315 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9317 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9320 /* Load the DIEs associated with PER_CU into memory.
9322 In some cases, the caller, while reading partial symbols, will need to load
9323 the full symbols for the CU for some reason. It will already have a
9324 dwarf2_cu object for THIS_CU and pass it as EXISTING_CU, so it can be re-used
9325 rather than creating a new one. */
9328 load_full_comp_unit (dwarf2_per_cu_data
*this_cu
,
9329 dwarf2_per_objfile
*per_objfile
,
9330 dwarf2_cu
*existing_cu
,
9332 enum language pretend_language
)
9334 gdb_assert (! this_cu
->is_debug_types
);
9336 cutu_reader
reader (this_cu
, per_objfile
, NULL
, existing_cu
, skip_partial
);
9340 struct dwarf2_cu
*cu
= reader
.cu
;
9341 const gdb_byte
*info_ptr
= reader
.info_ptr
;
9343 gdb_assert (cu
->die_hash
== NULL
);
9345 htab_create_alloc_ex (cu
->header
.length
/ 12,
9349 &cu
->comp_unit_obstack
,
9350 hashtab_obstack_allocate
,
9351 dummy_obstack_deallocate
);
9353 if (reader
.comp_unit_die
->has_children
)
9354 reader
.comp_unit_die
->child
9355 = read_die_and_siblings (&reader
, reader
.info_ptr
,
9356 &info_ptr
, reader
.comp_unit_die
);
9357 cu
->dies
= reader
.comp_unit_die
;
9358 /* comp_unit_die is not stored in die_hash, no need. */
9360 /* We try not to read any attributes in this function, because not
9361 all CUs needed for references have been loaded yet, and symbol
9362 table processing isn't initialized. But we have to set the CU language,
9363 or we won't be able to build types correctly.
9364 Similarly, if we do not read the producer, we can not apply
9365 producer-specific interpretation. */
9366 prepare_one_comp_unit (cu
, cu
->dies
, pretend_language
);
9371 /* Add a DIE to the delayed physname list. */
9374 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9375 const char *name
, struct die_info
*die
,
9376 struct dwarf2_cu
*cu
)
9378 struct delayed_method_info mi
;
9380 mi
.fnfield_index
= fnfield_index
;
9384 cu
->method_list
.push_back (mi
);
9387 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9388 "const" / "volatile". If so, decrements LEN by the length of the
9389 modifier and return true. Otherwise return false. */
9393 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9395 size_t mod_len
= sizeof (mod
) - 1;
9396 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9404 /* Compute the physnames of any methods on the CU's method list.
9406 The computation of method physnames is delayed in order to avoid the
9407 (bad) condition that one of the method's formal parameters is of an as yet
9411 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9413 /* Only C++ delays computing physnames. */
9414 if (cu
->method_list
.empty ())
9416 gdb_assert (cu
->language
== language_cplus
);
9418 for (const delayed_method_info
&mi
: cu
->method_list
)
9420 const char *physname
;
9421 struct fn_fieldlist
*fn_flp
9422 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9423 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9424 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9425 = physname
? physname
: "";
9427 /* Since there's no tag to indicate whether a method is a
9428 const/volatile overload, extract that information out of the
9430 if (physname
!= NULL
)
9432 size_t len
= strlen (physname
);
9436 if (physname
[len
] == ')') /* shortcut */
9438 else if (check_modifier (physname
, len
, " const"))
9439 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9440 else if (check_modifier (physname
, len
, " volatile"))
9441 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9448 /* The list is no longer needed. */
9449 cu
->method_list
.clear ();
9452 /* Go objects should be embedded in a DW_TAG_module DIE,
9453 and it's not clear if/how imported objects will appear.
9454 To keep Go support simple until that's worked out,
9455 go back through what we've read and create something usable.
9456 We could do this while processing each DIE, and feels kinda cleaner,
9457 but that way is more invasive.
9458 This is to, for example, allow the user to type "p var" or "b main"
9459 without having to specify the package name, and allow lookups
9460 of module.object to work in contexts that use the expression
9464 fixup_go_packaging (struct dwarf2_cu
*cu
)
9466 gdb::unique_xmalloc_ptr
<char> package_name
;
9467 struct pending
*list
;
9470 for (list
= *cu
->get_builder ()->get_global_symbols ();
9474 for (i
= 0; i
< list
->nsyms
; ++i
)
9476 struct symbol
*sym
= list
->symbol
[i
];
9478 if (sym
->language () == language_go
9479 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9481 gdb::unique_xmalloc_ptr
<char> this_package_name
9482 (go_symbol_package_name (sym
));
9484 if (this_package_name
== NULL
)
9486 if (package_name
== NULL
)
9487 package_name
= std::move (this_package_name
);
9490 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
9491 if (strcmp (package_name
.get (), this_package_name
.get ()) != 0)
9492 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9493 (symbol_symtab (sym
) != NULL
9494 ? symtab_to_filename_for_display
9495 (symbol_symtab (sym
))
9496 : objfile_name (objfile
)),
9497 this_package_name
.get (), package_name
.get ());
9503 if (package_name
!= NULL
)
9505 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
9506 const char *saved_package_name
= objfile
->intern (package_name
.get ());
9507 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9508 saved_package_name
);
9511 sym
= new (&objfile
->objfile_obstack
) symbol
;
9512 sym
->set_language (language_go
, &objfile
->objfile_obstack
);
9513 sym
->compute_and_set_names (saved_package_name
, false, objfile
->per_bfd
);
9514 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9515 e.g., "main" finds the "main" module and not C's main(). */
9516 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9517 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9518 SYMBOL_TYPE (sym
) = type
;
9520 add_symbol_to_list (sym
, cu
->get_builder ()->get_global_symbols ());
9524 /* Allocate a fully-qualified name consisting of the two parts on the
9528 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9530 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9533 /* A helper that allocates a variant part to attach to a Rust enum
9534 type. OBSTACK is where the results should be allocated. TYPE is
9535 the type we're processing. DISCRIMINANT_INDEX is the index of the
9536 discriminant. It must be the index of one of the fields of TYPE,
9537 or -1 to mean there is no discriminant (univariant enum).
9538 DEFAULT_INDEX is the index of the default field; or -1 if there is
9539 no default. RANGES is indexed by "effective" field number (the
9540 field index, but omitting the discriminant and default fields) and
9541 must hold the discriminant values used by the variants. Note that
9542 RANGES must have a lifetime at least as long as OBSTACK -- either
9543 already allocated on it, or static. */
9546 alloc_rust_variant (struct obstack
*obstack
, struct type
*type
,
9547 int discriminant_index
, int default_index
,
9548 gdb::array_view
<discriminant_range
> ranges
)
9550 /* When DISCRIMINANT_INDEX == -1, we have a univariant enum. */
9551 gdb_assert (discriminant_index
== -1
9552 || (discriminant_index
>= 0
9553 && discriminant_index
< type
->num_fields ()));
9554 gdb_assert (default_index
== -1
9555 || (default_index
>= 0 && default_index
< type
->num_fields ()));
9557 /* We have one variant for each non-discriminant field. */
9558 int n_variants
= type
->num_fields ();
9559 if (discriminant_index
!= -1)
9562 variant
*variants
= new (obstack
) variant
[n_variants
];
9565 for (int i
= 0; i
< type
->num_fields (); ++i
)
9567 if (i
== discriminant_index
)
9570 variants
[var_idx
].first_field
= i
;
9571 variants
[var_idx
].last_field
= i
+ 1;
9573 /* The default field does not need a range, but other fields do.
9574 We skipped the discriminant above. */
9575 if (i
!= default_index
)
9577 variants
[var_idx
].discriminants
= ranges
.slice (range_idx
, 1);
9584 gdb_assert (range_idx
== ranges
.size ());
9585 gdb_assert (var_idx
== n_variants
);
9587 variant_part
*part
= new (obstack
) variant_part
;
9588 part
->discriminant_index
= discriminant_index
;
9589 /* If there is no discriminant, then whether it is signed is of no
9592 = (discriminant_index
== -1
9594 : type
->field (discriminant_index
).type ()->is_unsigned ());
9595 part
->variants
= gdb::array_view
<variant
> (variants
, n_variants
);
9597 void *storage
= obstack_alloc (obstack
, sizeof (gdb::array_view
<variant_part
>));
9598 gdb::array_view
<variant_part
> *prop_value
9599 = new (storage
) gdb::array_view
<variant_part
> (part
, 1);
9601 struct dynamic_prop prop
;
9602 prop
.set_variant_parts (prop_value
);
9604 type
->add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
);
9607 /* Some versions of rustc emitted enums in an unusual way.
9609 Ordinary enums were emitted as unions. The first element of each
9610 structure in the union was named "RUST$ENUM$DISR". This element
9611 held the discriminant.
9613 These versions of Rust also implemented the "non-zero"
9614 optimization. When the enum had two values, and one is empty and
9615 the other holds a pointer that cannot be zero, the pointer is used
9616 as the discriminant, with a zero value meaning the empty variant.
9617 Here, the union's first member is of the form
9618 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9619 where the fieldnos are the indices of the fields that should be
9620 traversed in order to find the field (which may be several fields deep)
9621 and the variantname is the name of the variant of the case when the
9624 This function recognizes whether TYPE is of one of these forms,
9625 and, if so, smashes it to be a variant type. */
9628 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9630 gdb_assert (type
->code () == TYPE_CODE_UNION
);
9632 /* We don't need to deal with empty enums. */
9633 if (type
->num_fields () == 0)
9636 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9637 if (type
->num_fields () == 1
9638 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9640 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9642 /* Decode the field name to find the offset of the
9644 ULONGEST bit_offset
= 0;
9645 struct type
*field_type
= type
->field (0).type ();
9646 while (name
[0] >= '0' && name
[0] <= '9')
9649 unsigned long index
= strtoul (name
, &tail
, 10);
9652 || index
>= field_type
->num_fields ()
9653 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9654 != FIELD_LOC_KIND_BITPOS
))
9656 complaint (_("Could not parse Rust enum encoding string \"%s\""
9658 TYPE_FIELD_NAME (type
, 0),
9659 objfile_name (objfile
));
9664 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9665 field_type
= field_type
->field (index
).type ();
9668 /* Smash this type to be a structure type. We have to do this
9669 because the type has already been recorded. */
9670 type
->set_code (TYPE_CODE_STRUCT
);
9671 type
->set_num_fields (3);
9672 /* Save the field we care about. */
9673 struct field saved_field
= type
->field (0);
9675 ((struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
)));
9677 /* Put the discriminant at index 0. */
9678 type
->field (0).set_type (field_type
);
9679 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9680 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9681 SET_FIELD_BITPOS (type
->field (0), bit_offset
);
9683 /* The order of fields doesn't really matter, so put the real
9684 field at index 1 and the data-less field at index 2. */
9685 type
->field (1) = saved_field
;
9686 TYPE_FIELD_NAME (type
, 1)
9687 = rust_last_path_segment (type
->field (1).type ()->name ());
9688 type
->field (1).type ()->set_name
9689 (rust_fully_qualify (&objfile
->objfile_obstack
, type
->name (),
9690 TYPE_FIELD_NAME (type
, 1)));
9692 const char *dataless_name
9693 = rust_fully_qualify (&objfile
->objfile_obstack
, type
->name (),
9695 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9697 type
->field (2).set_type (dataless_type
);
9698 /* NAME points into the original discriminant name, which
9699 already has the correct lifetime. */
9700 TYPE_FIELD_NAME (type
, 2) = name
;
9701 SET_FIELD_BITPOS (type
->field (2), 0);
9703 /* Indicate that this is a variant type. */
9704 static discriminant_range ranges
[1] = { { 0, 0 } };
9705 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, 1, ranges
);
9707 /* A union with a single anonymous field is probably an old-style
9709 else if (type
->num_fields () == 1 && streq (TYPE_FIELD_NAME (type
, 0), ""))
9711 /* Smash this type to be a structure type. We have to do this
9712 because the type has already been recorded. */
9713 type
->set_code (TYPE_CODE_STRUCT
);
9715 struct type
*field_type
= type
->field (0).type ();
9716 const char *variant_name
9717 = rust_last_path_segment (field_type
->name ());
9718 TYPE_FIELD_NAME (type
, 0) = variant_name
;
9719 field_type
->set_name
9720 (rust_fully_qualify (&objfile
->objfile_obstack
,
9721 type
->name (), variant_name
));
9723 alloc_rust_variant (&objfile
->objfile_obstack
, type
, -1, 0, {});
9727 struct type
*disr_type
= nullptr;
9728 for (int i
= 0; i
< type
->num_fields (); ++i
)
9730 disr_type
= type
->field (i
).type ();
9732 if (disr_type
->code () != TYPE_CODE_STRUCT
)
9734 /* All fields of a true enum will be structs. */
9737 else if (disr_type
->num_fields () == 0)
9739 /* Could be data-less variant, so keep going. */
9740 disr_type
= nullptr;
9742 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
9743 "RUST$ENUM$DISR") != 0)
9745 /* Not a Rust enum. */
9755 /* If we got here without a discriminant, then it's probably
9757 if (disr_type
== nullptr)
9760 /* Smash this type to be a structure type. We have to do this
9761 because the type has already been recorded. */
9762 type
->set_code (TYPE_CODE_STRUCT
);
9764 /* Make space for the discriminant field. */
9765 struct field
*disr_field
= &disr_type
->field (0);
9767 = (struct field
*) TYPE_ZALLOC (type
, ((type
->num_fields () + 1)
9768 * sizeof (struct field
)));
9769 memcpy (new_fields
+ 1, type
->fields (),
9770 type
->num_fields () * sizeof (struct field
));
9771 type
->set_fields (new_fields
);
9772 type
->set_num_fields (type
->num_fields () + 1);
9774 /* Install the discriminant at index 0 in the union. */
9775 type
->field (0) = *disr_field
;
9776 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9777 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9779 /* We need a way to find the correct discriminant given a
9780 variant name. For convenience we build a map here. */
9781 struct type
*enum_type
= disr_field
->type ();
9782 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
9783 for (int i
= 0; i
< enum_type
->num_fields (); ++i
)
9785 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
9788 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
9789 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
9793 int n_fields
= type
->num_fields ();
9794 /* We don't need a range entry for the discriminant, but we do
9795 need one for every other field, as there is no default
9797 discriminant_range
*ranges
= XOBNEWVEC (&objfile
->objfile_obstack
,
9800 /* Skip the discriminant here. */
9801 for (int i
= 1; i
< n_fields
; ++i
)
9803 /* Find the final word in the name of this variant's type.
9804 That name can be used to look up the correct
9806 const char *variant_name
9807 = rust_last_path_segment (type
->field (i
).type ()->name ());
9809 auto iter
= discriminant_map
.find (variant_name
);
9810 if (iter
!= discriminant_map
.end ())
9812 ranges
[i
- 1].low
= iter
->second
;
9813 ranges
[i
- 1].high
= iter
->second
;
9816 /* In Rust, each element should have the size of the
9818 TYPE_LENGTH (type
->field (i
).type ()) = TYPE_LENGTH (type
);
9820 /* Remove the discriminant field, if it exists. */
9821 struct type
*sub_type
= type
->field (i
).type ();
9822 if (sub_type
->num_fields () > 0)
9824 sub_type
->set_num_fields (sub_type
->num_fields () - 1);
9825 sub_type
->set_fields (sub_type
->fields () + 1);
9827 TYPE_FIELD_NAME (type
, i
) = variant_name
;
9829 (rust_fully_qualify (&objfile
->objfile_obstack
,
9830 type
->name (), variant_name
));
9833 /* Indicate that this is a variant type. */
9834 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, -1,
9835 gdb::array_view
<discriminant_range
> (ranges
,
9840 /* Rewrite some Rust unions to be structures with variants parts. */
9843 rust_union_quirks (struct dwarf2_cu
*cu
)
9845 gdb_assert (cu
->language
== language_rust
);
9846 for (type
*type_
: cu
->rust_unions
)
9847 quirk_rust_enum (type_
, cu
->per_objfile
->objfile
);
9848 /* We don't need this any more. */
9849 cu
->rust_unions
.clear ();
9854 type_unit_group_unshareable
*
9855 dwarf2_per_objfile::get_type_unit_group_unshareable (type_unit_group
*tu_group
)
9857 auto iter
= this->m_type_units
.find (tu_group
);
9858 if (iter
!= this->m_type_units
.end ())
9859 return iter
->second
.get ();
9861 type_unit_group_unshareable_up
uniq (new type_unit_group_unshareable
);
9862 type_unit_group_unshareable
*result
= uniq
.get ();
9863 this->m_type_units
[tu_group
] = std::move (uniq
);
9868 dwarf2_per_objfile::get_type_for_signatured_type
9869 (signatured_type
*sig_type
) const
9871 auto iter
= this->m_type_map
.find (sig_type
);
9872 if (iter
== this->m_type_map
.end ())
9875 return iter
->second
;
9878 void dwarf2_per_objfile::set_type_for_signatured_type
9879 (signatured_type
*sig_type
, struct type
*type
)
9881 gdb_assert (this->m_type_map
.find (sig_type
) == this->m_type_map
.end ());
9883 this->m_type_map
[sig_type
] = type
;
9886 /* A helper function for computing the list of all symbol tables
9887 included by PER_CU. */
9890 recursively_compute_inclusions (std::vector
<compunit_symtab
*> *result
,
9891 htab_t all_children
, htab_t all_type_symtabs
,
9892 dwarf2_per_cu_data
*per_cu
,
9893 dwarf2_per_objfile
*per_objfile
,
9894 struct compunit_symtab
*immediate_parent
)
9896 void **slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
9899 /* This inclusion and its children have been processed. */
9905 /* Only add a CU if it has a symbol table. */
9906 compunit_symtab
*cust
= per_objfile
->get_symtab (per_cu
);
9909 /* If this is a type unit only add its symbol table if we haven't
9910 seen it yet (type unit per_cu's can share symtabs). */
9911 if (per_cu
->is_debug_types
)
9913 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
9917 result
->push_back (cust
);
9918 if (cust
->user
== NULL
)
9919 cust
->user
= immediate_parent
;
9924 result
->push_back (cust
);
9925 if (cust
->user
== NULL
)
9926 cust
->user
= immediate_parent
;
9930 if (!per_cu
->imported_symtabs_empty ())
9931 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9933 recursively_compute_inclusions (result
, all_children
,
9934 all_type_symtabs
, ptr
, per_objfile
,
9939 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
9943 compute_compunit_symtab_includes (dwarf2_per_cu_data
*per_cu
,
9944 dwarf2_per_objfile
*per_objfile
)
9946 gdb_assert (! per_cu
->is_debug_types
);
9948 if (!per_cu
->imported_symtabs_empty ())
9951 std::vector
<compunit_symtab
*> result_symtabs
;
9952 compunit_symtab
*cust
= per_objfile
->get_symtab (per_cu
);
9954 /* If we don't have a symtab, we can just skip this case. */
9958 htab_up
all_children (htab_create_alloc (1, htab_hash_pointer
,
9960 NULL
, xcalloc
, xfree
));
9961 htab_up
all_type_symtabs (htab_create_alloc (1, htab_hash_pointer
,
9963 NULL
, xcalloc
, xfree
));
9965 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9967 recursively_compute_inclusions (&result_symtabs
, all_children
.get (),
9968 all_type_symtabs
.get (), ptr
,
9972 /* Now we have a transitive closure of all the included symtabs. */
9973 len
= result_symtabs
.size ();
9975 = XOBNEWVEC (&per_objfile
->objfile
->objfile_obstack
,
9976 struct compunit_symtab
*, len
+ 1);
9977 memcpy (cust
->includes
, result_symtabs
.data (),
9978 len
* sizeof (compunit_symtab
*));
9979 cust
->includes
[len
] = NULL
;
9983 /* Compute the 'includes' field for the symtabs of all the CUs we just
9987 process_cu_includes (dwarf2_per_objfile
*per_objfile
)
9989 for (dwarf2_per_cu_data
*iter
: per_objfile
->per_bfd
->just_read_cus
)
9991 if (! iter
->is_debug_types
)
9992 compute_compunit_symtab_includes (iter
, per_objfile
);
9995 per_objfile
->per_bfd
->just_read_cus
.clear ();
9998 /* Generate full symbol information for CU, whose DIEs have
9999 already been loaded into memory. */
10002 process_full_comp_unit (dwarf2_cu
*cu
, enum language pretend_language
)
10004 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
10005 struct objfile
*objfile
= per_objfile
->objfile
;
10006 struct gdbarch
*gdbarch
= objfile
->arch ();
10007 CORE_ADDR lowpc
, highpc
;
10008 struct compunit_symtab
*cust
;
10009 CORE_ADDR baseaddr
;
10010 struct block
*static_block
;
10013 baseaddr
= objfile
->text_section_offset ();
10015 /* Clear the list here in case something was left over. */
10016 cu
->method_list
.clear ();
10018 cu
->language
= pretend_language
;
10019 cu
->language_defn
= language_def (cu
->language
);
10021 dwarf2_find_base_address (cu
->dies
, cu
);
10023 /* Do line number decoding in read_file_scope () */
10024 process_die (cu
->dies
, cu
);
10026 /* For now fudge the Go package. */
10027 if (cu
->language
== language_go
)
10028 fixup_go_packaging (cu
);
10030 /* Now that we have processed all the DIEs in the CU, all the types
10031 should be complete, and it should now be safe to compute all of the
10033 compute_delayed_physnames (cu
);
10035 if (cu
->language
== language_rust
)
10036 rust_union_quirks (cu
);
10038 /* Some compilers don't define a DW_AT_high_pc attribute for the
10039 compilation unit. If the DW_AT_high_pc is missing, synthesize
10040 it, by scanning the DIE's below the compilation unit. */
10041 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
10043 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
10044 static_block
= cu
->get_builder ()->end_symtab_get_static_block (addr
, 0, 1);
10046 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
10047 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
10048 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
10049 addrmap to help ensure it has an accurate map of pc values belonging to
10051 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
10053 cust
= cu
->get_builder ()->end_symtab_from_static_block (static_block
,
10054 SECT_OFF_TEXT (objfile
),
10059 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
10061 /* Set symtab language to language from DW_AT_language. If the
10062 compilation is from a C file generated by language preprocessors, do
10063 not set the language if it was already deduced by start_subfile. */
10064 if (!(cu
->language
== language_c
10065 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
10066 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10068 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
10069 produce DW_AT_location with location lists but it can be possibly
10070 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
10071 there were bugs in prologue debug info, fixed later in GCC-4.5
10072 by "unwind info for epilogues" patch (which is not directly related).
10074 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
10075 needed, it would be wrong due to missing DW_AT_producer there.
10077 Still one can confuse GDB by using non-standard GCC compilation
10078 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
10080 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
10081 cust
->locations_valid
= 1;
10083 if (gcc_4_minor
>= 5)
10084 cust
->epilogue_unwind_valid
= 1;
10086 cust
->call_site_htab
= cu
->call_site_htab
;
10089 per_objfile
->set_symtab (cu
->per_cu
, cust
);
10091 /* Push it for inclusion processing later. */
10092 per_objfile
->per_bfd
->just_read_cus
.push_back (cu
->per_cu
);
10094 /* Not needed any more. */
10095 cu
->reset_builder ();
10098 /* Generate full symbol information for type unit CU, whose DIEs have
10099 already been loaded into memory. */
10102 process_full_type_unit (dwarf2_cu
*cu
,
10103 enum language pretend_language
)
10105 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
10106 struct objfile
*objfile
= per_objfile
->objfile
;
10107 struct compunit_symtab
*cust
;
10108 struct signatured_type
*sig_type
;
10110 gdb_assert (cu
->per_cu
->is_debug_types
);
10111 sig_type
= (struct signatured_type
*) cu
->per_cu
;
10113 /* Clear the list here in case something was left over. */
10114 cu
->method_list
.clear ();
10116 cu
->language
= pretend_language
;
10117 cu
->language_defn
= language_def (cu
->language
);
10119 /* The symbol tables are set up in read_type_unit_scope. */
10120 process_die (cu
->dies
, cu
);
10122 /* For now fudge the Go package. */
10123 if (cu
->language
== language_go
)
10124 fixup_go_packaging (cu
);
10126 /* Now that we have processed all the DIEs in the CU, all the types
10127 should be complete, and it should now be safe to compute all of the
10129 compute_delayed_physnames (cu
);
10131 if (cu
->language
== language_rust
)
10132 rust_union_quirks (cu
);
10134 /* TUs share symbol tables.
10135 If this is the first TU to use this symtab, complete the construction
10136 of it with end_expandable_symtab. Otherwise, complete the addition of
10137 this TU's symbols to the existing symtab. */
10138 type_unit_group_unshareable
*tug_unshare
=
10139 per_objfile
->get_type_unit_group_unshareable (sig_type
->type_unit_group
);
10140 if (tug_unshare
->compunit_symtab
== NULL
)
10142 buildsym_compunit
*builder
= cu
->get_builder ();
10143 cust
= builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
10144 tug_unshare
->compunit_symtab
= cust
;
10148 /* Set symtab language to language from DW_AT_language. If the
10149 compilation is from a C file generated by language preprocessors,
10150 do not set the language if it was already deduced by
10152 if (!(cu
->language
== language_c
10153 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
10154 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10159 cu
->get_builder ()->augment_type_symtab ();
10160 cust
= tug_unshare
->compunit_symtab
;
10163 per_objfile
->set_symtab (cu
->per_cu
, cust
);
10165 /* Not needed any more. */
10166 cu
->reset_builder ();
10169 /* Process an imported unit DIE. */
10172 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10174 struct attribute
*attr
;
10176 /* For now we don't handle imported units in type units. */
10177 if (cu
->per_cu
->is_debug_types
)
10179 error (_("Dwarf Error: DW_TAG_imported_unit is not"
10180 " supported in type units [in module %s]"),
10181 objfile_name (cu
->per_objfile
->objfile
));
10184 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10187 sect_offset sect_off
= attr
->get_ref_die_offset ();
10188 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
10189 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
10190 dwarf2_per_cu_data
*per_cu
10191 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
, per_objfile
);
10193 /* We're importing a C++ compilation unit with tag DW_TAG_compile_unit
10194 into another compilation unit, at root level. Regard this as a hint,
10196 if (die
->parent
&& die
->parent
->parent
== NULL
10197 && per_cu
->unit_type
== DW_UT_compile
10198 && per_cu
->lang
== language_cplus
)
10201 /* If necessary, add it to the queue and load its DIEs. */
10202 if (maybe_queue_comp_unit (cu
, per_cu
, per_objfile
, cu
->language
))
10203 load_full_comp_unit (per_cu
, per_objfile
, per_objfile
->get_cu (per_cu
),
10204 false, cu
->language
);
10206 cu
->per_cu
->imported_symtabs_push (per_cu
);
10210 /* RAII object that represents a process_die scope: i.e.,
10211 starts/finishes processing a DIE. */
10212 class process_die_scope
10215 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
10216 : m_die (die
), m_cu (cu
)
10218 /* We should only be processing DIEs not already in process. */
10219 gdb_assert (!m_die
->in_process
);
10220 m_die
->in_process
= true;
10223 ~process_die_scope ()
10225 m_die
->in_process
= false;
10227 /* If we're done processing the DIE for the CU that owns the line
10228 header, we don't need the line header anymore. */
10229 if (m_cu
->line_header_die_owner
== m_die
)
10231 delete m_cu
->line_header
;
10232 m_cu
->line_header
= NULL
;
10233 m_cu
->line_header_die_owner
= NULL
;
10242 /* Process a die and its children. */
10245 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10247 process_die_scope
scope (die
, cu
);
10251 case DW_TAG_padding
:
10253 case DW_TAG_compile_unit
:
10254 case DW_TAG_partial_unit
:
10255 read_file_scope (die
, cu
);
10257 case DW_TAG_type_unit
:
10258 read_type_unit_scope (die
, cu
);
10260 case DW_TAG_subprogram
:
10261 /* Nested subprograms in Fortran get a prefix. */
10262 if (cu
->language
== language_fortran
10263 && die
->parent
!= NULL
10264 && die
->parent
->tag
== DW_TAG_subprogram
)
10265 cu
->processing_has_namespace_info
= true;
10266 /* Fall through. */
10267 case DW_TAG_inlined_subroutine
:
10268 read_func_scope (die
, cu
);
10270 case DW_TAG_lexical_block
:
10271 case DW_TAG_try_block
:
10272 case DW_TAG_catch_block
:
10273 read_lexical_block_scope (die
, cu
);
10275 case DW_TAG_call_site
:
10276 case DW_TAG_GNU_call_site
:
10277 read_call_site_scope (die
, cu
);
10279 case DW_TAG_class_type
:
10280 case DW_TAG_interface_type
:
10281 case DW_TAG_structure_type
:
10282 case DW_TAG_union_type
:
10283 process_structure_scope (die
, cu
);
10285 case DW_TAG_enumeration_type
:
10286 process_enumeration_scope (die
, cu
);
10289 /* These dies have a type, but processing them does not create
10290 a symbol or recurse to process the children. Therefore we can
10291 read them on-demand through read_type_die. */
10292 case DW_TAG_subroutine_type
:
10293 case DW_TAG_set_type
:
10294 case DW_TAG_pointer_type
:
10295 case DW_TAG_ptr_to_member_type
:
10296 case DW_TAG_reference_type
:
10297 case DW_TAG_rvalue_reference_type
:
10298 case DW_TAG_string_type
:
10301 case DW_TAG_array_type
:
10302 /* We only need to handle this case for Ada -- in other
10303 languages, it's normal for the compiler to emit a typedef
10305 if (cu
->language
!= language_ada
)
10308 case DW_TAG_base_type
:
10309 case DW_TAG_subrange_type
:
10310 case DW_TAG_typedef
:
10311 /* Add a typedef symbol for the type definition, if it has a
10313 new_symbol (die
, read_type_die (die
, cu
), cu
);
10315 case DW_TAG_common_block
:
10316 read_common_block (die
, cu
);
10318 case DW_TAG_common_inclusion
:
10320 case DW_TAG_namespace
:
10321 cu
->processing_has_namespace_info
= true;
10322 read_namespace (die
, cu
);
10324 case DW_TAG_module
:
10325 cu
->processing_has_namespace_info
= true;
10326 read_module (die
, cu
);
10328 case DW_TAG_imported_declaration
:
10329 cu
->processing_has_namespace_info
= true;
10330 if (read_namespace_alias (die
, cu
))
10332 /* The declaration is not a global namespace alias. */
10333 /* Fall through. */
10334 case DW_TAG_imported_module
:
10335 cu
->processing_has_namespace_info
= true;
10336 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10337 || cu
->language
!= language_fortran
))
10338 complaint (_("Tag '%s' has unexpected children"),
10339 dwarf_tag_name (die
->tag
));
10340 read_import_statement (die
, cu
);
10343 case DW_TAG_imported_unit
:
10344 process_imported_unit_die (die
, cu
);
10347 case DW_TAG_variable
:
10348 read_variable (die
, cu
);
10352 new_symbol (die
, NULL
, cu
);
10357 /* DWARF name computation. */
10359 /* A helper function for dwarf2_compute_name which determines whether DIE
10360 needs to have the name of the scope prepended to the name listed in the
10364 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10366 struct attribute
*attr
;
10370 case DW_TAG_namespace
:
10371 case DW_TAG_typedef
:
10372 case DW_TAG_class_type
:
10373 case DW_TAG_interface_type
:
10374 case DW_TAG_structure_type
:
10375 case DW_TAG_union_type
:
10376 case DW_TAG_enumeration_type
:
10377 case DW_TAG_enumerator
:
10378 case DW_TAG_subprogram
:
10379 case DW_TAG_inlined_subroutine
:
10380 case DW_TAG_member
:
10381 case DW_TAG_imported_declaration
:
10384 case DW_TAG_variable
:
10385 case DW_TAG_constant
:
10386 /* We only need to prefix "globally" visible variables. These include
10387 any variable marked with DW_AT_external or any variable that
10388 lives in a namespace. [Variables in anonymous namespaces
10389 require prefixing, but they are not DW_AT_external.] */
10391 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10393 struct dwarf2_cu
*spec_cu
= cu
;
10395 return die_needs_namespace (die_specification (die
, &spec_cu
),
10399 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10400 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10401 && die
->parent
->tag
!= DW_TAG_module
)
10403 /* A variable in a lexical block of some kind does not need a
10404 namespace, even though in C++ such variables may be external
10405 and have a mangled name. */
10406 if (die
->parent
->tag
== DW_TAG_lexical_block
10407 || die
->parent
->tag
== DW_TAG_try_block
10408 || die
->parent
->tag
== DW_TAG_catch_block
10409 || die
->parent
->tag
== DW_TAG_subprogram
)
10418 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10419 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10420 defined for the given DIE. */
10422 static struct attribute
*
10423 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10425 struct attribute
*attr
;
10427 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10429 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10434 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10435 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10436 defined for the given DIE. */
10438 static const char *
10439 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10441 const char *linkage_name
;
10443 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10444 if (linkage_name
== NULL
)
10445 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10447 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10448 See https://github.com/rust-lang/rust/issues/32925. */
10449 if (cu
->language
== language_rust
&& linkage_name
!= NULL
10450 && strchr (linkage_name
, '{') != NULL
)
10451 linkage_name
= NULL
;
10453 return linkage_name
;
10456 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10457 compute the physname for the object, which include a method's:
10458 - formal parameters (C++),
10459 - receiver type (Go),
10461 The term "physname" is a bit confusing.
10462 For C++, for example, it is the demangled name.
10463 For Go, for example, it's the mangled name.
10465 For Ada, return the DIE's linkage name rather than the fully qualified
10466 name. PHYSNAME is ignored..
10468 The result is allocated on the objfile->per_bfd's obstack and
10471 static const char *
10472 dwarf2_compute_name (const char *name
,
10473 struct die_info
*die
, struct dwarf2_cu
*cu
,
10476 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
10479 name
= dwarf2_name (die
, cu
);
10481 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10482 but otherwise compute it by typename_concat inside GDB.
10483 FIXME: Actually this is not really true, or at least not always true.
10484 It's all very confusing. compute_and_set_names doesn't try to demangle
10485 Fortran names because there is no mangling standard. So new_symbol
10486 will set the demangled name to the result of dwarf2_full_name, and it is
10487 the demangled name that GDB uses if it exists. */
10488 if (cu
->language
== language_ada
10489 || (cu
->language
== language_fortran
&& physname
))
10491 /* For Ada unit, we prefer the linkage name over the name, as
10492 the former contains the exported name, which the user expects
10493 to be able to reference. Ideally, we want the user to be able
10494 to reference this entity using either natural or linkage name,
10495 but we haven't started looking at this enhancement yet. */
10496 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10498 if (linkage_name
!= NULL
)
10499 return linkage_name
;
10502 /* These are the only languages we know how to qualify names in. */
10504 && (cu
->language
== language_cplus
10505 || cu
->language
== language_fortran
|| cu
->language
== language_d
10506 || cu
->language
== language_rust
))
10508 if (die_needs_namespace (die
, cu
))
10510 const char *prefix
;
10511 const char *canonical_name
= NULL
;
10515 prefix
= determine_prefix (die
, cu
);
10516 if (*prefix
!= '\0')
10518 gdb::unique_xmalloc_ptr
<char> prefixed_name
10519 (typename_concat (NULL
, prefix
, name
, physname
, cu
));
10521 buf
.puts (prefixed_name
.get ());
10526 /* Template parameters may be specified in the DIE's DW_AT_name, or
10527 as children with DW_TAG_template_type_param or
10528 DW_TAG_value_type_param. If the latter, add them to the name
10529 here. If the name already has template parameters, then
10530 skip this step; some versions of GCC emit both, and
10531 it is more efficient to use the pre-computed name.
10533 Something to keep in mind about this process: it is very
10534 unlikely, or in some cases downright impossible, to produce
10535 something that will match the mangled name of a function.
10536 If the definition of the function has the same debug info,
10537 we should be able to match up with it anyway. But fallbacks
10538 using the minimal symbol, for instance to find a method
10539 implemented in a stripped copy of libstdc++, will not work.
10540 If we do not have debug info for the definition, we will have to
10541 match them up some other way.
10543 When we do name matching there is a related problem with function
10544 templates; two instantiated function templates are allowed to
10545 differ only by their return types, which we do not add here. */
10547 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10549 struct attribute
*attr
;
10550 struct die_info
*child
;
10552 const language_defn
*cplus_lang
= language_def (cu
->language
);
10554 die
->building_fullname
= 1;
10556 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10560 const gdb_byte
*bytes
;
10561 struct dwarf2_locexpr_baton
*baton
;
10564 if (child
->tag
!= DW_TAG_template_type_param
10565 && child
->tag
!= DW_TAG_template_value_param
)
10576 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10579 complaint (_("template parameter missing DW_AT_type"));
10580 buf
.puts ("UNKNOWN_TYPE");
10583 type
= die_type (child
, cu
);
10585 if (child
->tag
== DW_TAG_template_type_param
)
10587 cplus_lang
->print_type (type
, "", &buf
, -1, 0,
10588 &type_print_raw_options
);
10592 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10595 complaint (_("template parameter missing "
10596 "DW_AT_const_value"));
10597 buf
.puts ("UNKNOWN_VALUE");
10601 dwarf2_const_value_attr (attr
, type
, name
,
10602 &cu
->comp_unit_obstack
, cu
,
10603 &value
, &bytes
, &baton
);
10605 if (type
->has_no_signedness ())
10606 /* GDB prints characters as NUMBER 'CHAR'. If that's
10607 changed, this can use value_print instead. */
10608 cplus_lang
->printchar (value
, type
, &buf
);
10611 struct value_print_options opts
;
10614 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10618 baton
->per_objfile
);
10619 else if (bytes
!= NULL
)
10621 v
= allocate_value (type
);
10622 memcpy (value_contents_writeable (v
), bytes
,
10623 TYPE_LENGTH (type
));
10626 v
= value_from_longest (type
, value
);
10628 /* Specify decimal so that we do not depend on
10630 get_formatted_print_options (&opts
, 'd');
10632 value_print (v
, &buf
, &opts
);
10637 die
->building_fullname
= 0;
10641 /* Close the argument list, with a space if necessary
10642 (nested templates). */
10643 if (!buf
.empty () && buf
.string ().back () == '>')
10650 /* For C++ methods, append formal parameter type
10651 information, if PHYSNAME. */
10653 if (physname
&& die
->tag
== DW_TAG_subprogram
10654 && cu
->language
== language_cplus
)
10656 struct type
*type
= read_type_die (die
, cu
);
10658 c_type_print_args (type
, &buf
, 1, cu
->language
,
10659 &type_print_raw_options
);
10661 if (cu
->language
== language_cplus
)
10663 /* Assume that an artificial first parameter is
10664 "this", but do not crash if it is not. RealView
10665 marks unnamed (and thus unused) parameters as
10666 artificial; there is no way to differentiate
10668 if (type
->num_fields () > 0
10669 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10670 && type
->field (0).type ()->code () == TYPE_CODE_PTR
10671 && TYPE_CONST (TYPE_TARGET_TYPE (type
->field (0).type ())))
10672 buf
.puts (" const");
10676 const std::string
&intermediate_name
= buf
.string ();
10678 if (cu
->language
== language_cplus
)
10680 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10683 /* If we only computed INTERMEDIATE_NAME, or if
10684 INTERMEDIATE_NAME is already canonical, then we need to
10686 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10687 name
= objfile
->intern (intermediate_name
);
10689 name
= canonical_name
;
10696 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10697 If scope qualifiers are appropriate they will be added. The result
10698 will be allocated on the storage_obstack, or NULL if the DIE does
10699 not have a name. NAME may either be from a previous call to
10700 dwarf2_name or NULL.
10702 The output string will be canonicalized (if C++). */
10704 static const char *
10705 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10707 return dwarf2_compute_name (name
, die
, cu
, 0);
10710 /* Construct a physname for the given DIE in CU. NAME may either be
10711 from a previous call to dwarf2_name or NULL. The result will be
10712 allocated on the objfile_objstack or NULL if the DIE does not have a
10715 The output string will be canonicalized (if C++). */
10717 static const char *
10718 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10720 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
10721 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10724 /* In this case dwarf2_compute_name is just a shortcut not building anything
10726 if (!die_needs_namespace (die
, cu
))
10727 return dwarf2_compute_name (name
, die
, cu
, 1);
10729 if (cu
->language
!= language_rust
)
10730 mangled
= dw2_linkage_name (die
, cu
);
10732 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
10734 gdb::unique_xmalloc_ptr
<char> demangled
;
10735 if (mangled
!= NULL
)
10738 if (language_def (cu
->language
)->store_sym_names_in_linkage_form_p ())
10740 /* Do nothing (do not demangle the symbol name). */
10744 /* Use DMGL_RET_DROP for C++ template functions to suppress
10745 their return type. It is easier for GDB users to search
10746 for such functions as `name(params)' than `long name(params)'.
10747 In such case the minimal symbol names do not match the full
10748 symbol names but for template functions there is never a need
10749 to look up their definition from their declaration so
10750 the only disadvantage remains the minimal symbol variant
10751 `long name(params)' does not have the proper inferior type. */
10752 demangled
.reset (gdb_demangle (mangled
,
10753 (DMGL_PARAMS
| DMGL_ANSI
10754 | DMGL_RET_DROP
)));
10757 canon
= demangled
.get ();
10765 if (canon
== NULL
|| check_physname
)
10767 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
10769 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
10771 /* It may not mean a bug in GDB. The compiler could also
10772 compute DW_AT_linkage_name incorrectly. But in such case
10773 GDB would need to be bug-to-bug compatible. */
10775 complaint (_("Computed physname <%s> does not match demangled <%s> "
10776 "(from linkage <%s>) - DIE at %s [in module %s]"),
10777 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
10778 objfile_name (objfile
));
10780 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
10781 is available here - over computed PHYSNAME. It is safer
10782 against both buggy GDB and buggy compilers. */
10796 retval
= objfile
->intern (retval
);
10801 /* Inspect DIE in CU for a namespace alias. If one exists, record
10802 a new symbol for it.
10804 Returns 1 if a namespace alias was recorded, 0 otherwise. */
10807 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
10809 struct attribute
*attr
;
10811 /* If the die does not have a name, this is not a namespace
10813 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
10817 struct die_info
*d
= die
;
10818 struct dwarf2_cu
*imported_cu
= cu
;
10820 /* If the compiler has nested DW_AT_imported_declaration DIEs,
10821 keep inspecting DIEs until we hit the underlying import. */
10822 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
10823 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
10825 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
10829 d
= follow_die_ref (d
, attr
, &imported_cu
);
10830 if (d
->tag
!= DW_TAG_imported_declaration
)
10834 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
10836 complaint (_("DIE at %s has too many recursively imported "
10837 "declarations"), sect_offset_str (d
->sect_off
));
10844 sect_offset sect_off
= attr
->get_ref_die_offset ();
10846 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
, cu
->per_objfile
);
10847 if (type
!= NULL
&& type
->code () == TYPE_CODE_NAMESPACE
)
10849 /* This declaration is a global namespace alias. Add
10850 a symbol for it whose type is the aliased namespace. */
10851 new_symbol (die
, type
, cu
);
10860 /* Return the using directives repository (global or local?) to use in the
10861 current context for CU.
10863 For Ada, imported declarations can materialize renamings, which *may* be
10864 global. However it is impossible (for now?) in DWARF to distinguish
10865 "external" imported declarations and "static" ones. As all imported
10866 declarations seem to be static in all other languages, make them all CU-wide
10867 global only in Ada. */
10869 static struct using_direct
**
10870 using_directives (struct dwarf2_cu
*cu
)
10872 if (cu
->language
== language_ada
10873 && cu
->get_builder ()->outermost_context_p ())
10874 return cu
->get_builder ()->get_global_using_directives ();
10876 return cu
->get_builder ()->get_local_using_directives ();
10879 /* Read the import statement specified by the given die and record it. */
10882 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
10884 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
10885 struct attribute
*import_attr
;
10886 struct die_info
*imported_die
, *child_die
;
10887 struct dwarf2_cu
*imported_cu
;
10888 const char *imported_name
;
10889 const char *imported_name_prefix
;
10890 const char *canonical_name
;
10891 const char *import_alias
;
10892 const char *imported_declaration
= NULL
;
10893 const char *import_prefix
;
10894 std::vector
<const char *> excludes
;
10896 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10897 if (import_attr
== NULL
)
10899 complaint (_("Tag '%s' has no DW_AT_import"),
10900 dwarf_tag_name (die
->tag
));
10905 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
10906 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10907 if (imported_name
== NULL
)
10909 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
10911 The import in the following code:
10925 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
10926 <52> DW_AT_decl_file : 1
10927 <53> DW_AT_decl_line : 6
10928 <54> DW_AT_import : <0x75>
10929 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
10930 <59> DW_AT_name : B
10931 <5b> DW_AT_decl_file : 1
10932 <5c> DW_AT_decl_line : 2
10933 <5d> DW_AT_type : <0x6e>
10935 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
10936 <76> DW_AT_byte_size : 4
10937 <77> DW_AT_encoding : 5 (signed)
10939 imports the wrong die ( 0x75 instead of 0x58 ).
10940 This case will be ignored until the gcc bug is fixed. */
10944 /* Figure out the local name after import. */
10945 import_alias
= dwarf2_name (die
, cu
);
10947 /* Figure out where the statement is being imported to. */
10948 import_prefix
= determine_prefix (die
, cu
);
10950 /* Figure out what the scope of the imported die is and prepend it
10951 to the name of the imported die. */
10952 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
10954 if (imported_die
->tag
!= DW_TAG_namespace
10955 && imported_die
->tag
!= DW_TAG_module
)
10957 imported_declaration
= imported_name
;
10958 canonical_name
= imported_name_prefix
;
10960 else if (strlen (imported_name_prefix
) > 0)
10961 canonical_name
= obconcat (&objfile
->objfile_obstack
,
10962 imported_name_prefix
,
10963 (cu
->language
== language_d
? "." : "::"),
10964 imported_name
, (char *) NULL
);
10966 canonical_name
= imported_name
;
10968 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
10969 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
10970 child_die
= child_die
->sibling
)
10972 /* DWARF-4: A Fortran use statement with a “rename list” may be
10973 represented by an imported module entry with an import attribute
10974 referring to the module and owned entries corresponding to those
10975 entities that are renamed as part of being imported. */
10977 if (child_die
->tag
!= DW_TAG_imported_declaration
)
10979 complaint (_("child DW_TAG_imported_declaration expected "
10980 "- DIE at %s [in module %s]"),
10981 sect_offset_str (child_die
->sect_off
),
10982 objfile_name (objfile
));
10986 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
10987 if (import_attr
== NULL
)
10989 complaint (_("Tag '%s' has no DW_AT_import"),
10990 dwarf_tag_name (child_die
->tag
));
10995 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
10997 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10998 if (imported_name
== NULL
)
11000 complaint (_("child DW_TAG_imported_declaration has unknown "
11001 "imported name - DIE at %s [in module %s]"),
11002 sect_offset_str (child_die
->sect_off
),
11003 objfile_name (objfile
));
11007 excludes
.push_back (imported_name
);
11009 process_die (child_die
, cu
);
11012 add_using_directive (using_directives (cu
),
11016 imported_declaration
,
11019 &objfile
->objfile_obstack
);
11022 /* ICC<14 does not output the required DW_AT_declaration on incomplete
11023 types, but gives them a size of zero. Starting with version 14,
11024 ICC is compatible with GCC. */
11027 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
11029 if (!cu
->checked_producer
)
11030 check_producer (cu
);
11032 return cu
->producer_is_icc_lt_14
;
11035 /* ICC generates a DW_AT_type for C void functions. This was observed on
11036 ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2)
11037 which says that void functions should not have a DW_AT_type. */
11040 producer_is_icc (struct dwarf2_cu
*cu
)
11042 if (!cu
->checked_producer
)
11043 check_producer (cu
);
11045 return cu
->producer_is_icc
;
11048 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
11049 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
11050 this, it was first present in GCC release 4.3.0. */
11053 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
11055 if (!cu
->checked_producer
)
11056 check_producer (cu
);
11058 return cu
->producer_is_gcc_lt_4_3
;
11061 static file_and_directory
11062 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
11064 file_and_directory res
;
11066 /* Find the filename. Do not use dwarf2_name here, since the filename
11067 is not a source language identifier. */
11068 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
11069 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
11071 if (res
.comp_dir
== NULL
11072 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
11073 && IS_ABSOLUTE_PATH (res
.name
))
11075 res
.comp_dir_storage
= ldirname (res
.name
);
11076 if (!res
.comp_dir_storage
.empty ())
11077 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
11079 if (res
.comp_dir
!= NULL
)
11081 /* Irix 6.2 native cc prepends <machine>.: to the compilation
11082 directory, get rid of it. */
11083 const char *cp
= strchr (res
.comp_dir
, ':');
11085 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
11086 res
.comp_dir
= cp
+ 1;
11089 if (res
.name
== NULL
)
11090 res
.name
= "<unknown>";
11095 /* Handle DW_AT_stmt_list for a compilation unit.
11096 DIE is the DW_TAG_compile_unit die for CU.
11097 COMP_DIR is the compilation directory. LOWPC is passed to
11098 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
11101 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
11102 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
11104 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
11105 struct attribute
*attr
;
11106 struct line_header line_header_local
;
11107 hashval_t line_header_local_hash
;
11109 int decode_mapping
;
11111 gdb_assert (! cu
->per_cu
->is_debug_types
);
11113 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11114 if (attr
== NULL
|| !attr
->form_is_unsigned ())
11117 sect_offset line_offset
= (sect_offset
) attr
->as_unsigned ();
11119 /* The line header hash table is only created if needed (it exists to
11120 prevent redundant reading of the line table for partial_units).
11121 If we're given a partial_unit, we'll need it. If we're given a
11122 compile_unit, then use the line header hash table if it's already
11123 created, but don't create one just yet. */
11125 if (per_objfile
->line_header_hash
== NULL
11126 && die
->tag
== DW_TAG_partial_unit
)
11128 per_objfile
->line_header_hash
11129 .reset (htab_create_alloc (127, line_header_hash_voidp
,
11130 line_header_eq_voidp
,
11131 free_line_header_voidp
,
11135 line_header_local
.sect_off
= line_offset
;
11136 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
11137 line_header_local_hash
= line_header_hash (&line_header_local
);
11138 if (per_objfile
->line_header_hash
!= NULL
)
11140 slot
= htab_find_slot_with_hash (per_objfile
->line_header_hash
.get (),
11141 &line_header_local
,
11142 line_header_local_hash
, NO_INSERT
);
11144 /* For DW_TAG_compile_unit we need info like symtab::linetable which
11145 is not present in *SLOT (since if there is something in *SLOT then
11146 it will be for a partial_unit). */
11147 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
11149 gdb_assert (*slot
!= NULL
);
11150 cu
->line_header
= (struct line_header
*) *slot
;
11155 /* dwarf_decode_line_header does not yet provide sufficient information.
11156 We always have to call also dwarf_decode_lines for it. */
11157 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
11161 cu
->line_header
= lh
.release ();
11162 cu
->line_header_die_owner
= die
;
11164 if (per_objfile
->line_header_hash
== NULL
)
11168 slot
= htab_find_slot_with_hash (per_objfile
->line_header_hash
.get (),
11169 &line_header_local
,
11170 line_header_local_hash
, INSERT
);
11171 gdb_assert (slot
!= NULL
);
11173 if (slot
!= NULL
&& *slot
== NULL
)
11175 /* This newly decoded line number information unit will be owned
11176 by line_header_hash hash table. */
11177 *slot
= cu
->line_header
;
11178 cu
->line_header_die_owner
= NULL
;
11182 /* We cannot free any current entry in (*slot) as that struct line_header
11183 may be already used by multiple CUs. Create only temporary decoded
11184 line_header for this CU - it may happen at most once for each line
11185 number information unit. And if we're not using line_header_hash
11186 then this is what we want as well. */
11187 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
11189 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
11190 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
11195 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
11198 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11200 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
11201 struct objfile
*objfile
= per_objfile
->objfile
;
11202 struct gdbarch
*gdbarch
= objfile
->arch ();
11203 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
11204 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
11205 struct attribute
*attr
;
11206 struct die_info
*child_die
;
11207 CORE_ADDR baseaddr
;
11209 prepare_one_comp_unit (cu
, die
, cu
->language
);
11210 baseaddr
= objfile
->text_section_offset ();
11212 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
11214 /* If we didn't find a lowpc, set it to highpc to avoid complaints
11215 from finish_block. */
11216 if (lowpc
== ((CORE_ADDR
) -1))
11218 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11220 file_and_directory fnd
= find_file_and_directory (die
, cu
);
11222 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
11223 standardised yet. As a workaround for the language detection we fall
11224 back to the DW_AT_producer string. */
11225 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
11226 cu
->language
= language_opencl
;
11228 /* Similar hack for Go. */
11229 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
11230 set_cu_language (DW_LANG_Go
, cu
);
11232 cu
->start_symtab (fnd
.name
, fnd
.comp_dir
, lowpc
);
11234 /* Decode line number information if present. We do this before
11235 processing child DIEs, so that the line header table is available
11236 for DW_AT_decl_file. */
11237 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
11239 /* Process all dies in compilation unit. */
11240 if (die
->child
!= NULL
)
11242 child_die
= die
->child
;
11243 while (child_die
&& child_die
->tag
)
11245 process_die (child_die
, cu
);
11246 child_die
= child_die
->sibling
;
11250 /* Decode macro information, if present. Dwarf 2 macro information
11251 refers to information in the line number info statement program
11252 header, so we can only read it if we've read the header
11254 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11256 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11257 if (attr
!= nullptr && attr
->form_is_unsigned () && cu
->line_header
)
11259 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11260 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11262 dwarf_decode_macros (cu
, attr
->as_unsigned (), 1);
11266 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11267 if (attr
!= nullptr && attr
->form_is_unsigned () && cu
->line_header
)
11269 unsigned int macro_offset
= attr
->as_unsigned ();
11271 dwarf_decode_macros (cu
, macro_offset
, 0);
11277 dwarf2_cu::setup_type_unit_groups (struct die_info
*die
)
11279 struct type_unit_group
*tu_group
;
11281 struct attribute
*attr
;
11283 struct signatured_type
*sig_type
;
11285 gdb_assert (per_cu
->is_debug_types
);
11286 sig_type
= (struct signatured_type
*) per_cu
;
11288 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, this);
11290 /* If we're using .gdb_index (includes -readnow) then
11291 per_cu->type_unit_group may not have been set up yet. */
11292 if (sig_type
->type_unit_group
== NULL
)
11293 sig_type
->type_unit_group
= get_type_unit_group (this, attr
);
11294 tu_group
= sig_type
->type_unit_group
;
11296 /* If we've already processed this stmt_list there's no real need to
11297 do it again, we could fake it and just recreate the part we need
11298 (file name,index -> symtab mapping). If data shows this optimization
11299 is useful we can do it then. */
11300 type_unit_group_unshareable
*tug_unshare
11301 = per_objfile
->get_type_unit_group_unshareable (tu_group
);
11302 first_time
= tug_unshare
->compunit_symtab
== NULL
;
11304 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11307 if (attr
!= NULL
&& attr
->form_is_unsigned ())
11309 sect_offset line_offset
= (sect_offset
) attr
->as_unsigned ();
11310 lh
= dwarf_decode_line_header (line_offset
, this);
11315 start_symtab ("", NULL
, 0);
11318 gdb_assert (tug_unshare
->symtabs
== NULL
);
11319 gdb_assert (m_builder
== nullptr);
11320 struct compunit_symtab
*cust
= tug_unshare
->compunit_symtab
;
11321 m_builder
.reset (new struct buildsym_compunit
11322 (COMPUNIT_OBJFILE (cust
), "",
11323 COMPUNIT_DIRNAME (cust
),
11324 compunit_language (cust
),
11326 list_in_scope
= get_builder ()->get_file_symbols ();
11331 line_header
= lh
.release ();
11332 line_header_die_owner
= die
;
11336 struct compunit_symtab
*cust
= start_symtab ("", NULL
, 0);
11338 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11339 still initializing it, and our caller (a few levels up)
11340 process_full_type_unit still needs to know if this is the first
11343 tug_unshare
->symtabs
11344 = XOBNEWVEC (&COMPUNIT_OBJFILE (cust
)->objfile_obstack
,
11345 struct symtab
*, line_header
->file_names_size ());
11347 auto &file_names
= line_header
->file_names ();
11348 for (i
= 0; i
< file_names
.size (); ++i
)
11350 file_entry
&fe
= file_names
[i
];
11351 dwarf2_start_subfile (this, fe
.name
,
11352 fe
.include_dir (line_header
));
11353 buildsym_compunit
*b
= get_builder ();
11354 if (b
->get_current_subfile ()->symtab
== NULL
)
11356 /* NOTE: start_subfile will recognize when it's been
11357 passed a file it has already seen. So we can't
11358 assume there's a simple mapping from
11359 cu->line_header->file_names to subfiles, plus
11360 cu->line_header->file_names may contain dups. */
11361 b
->get_current_subfile ()->symtab
11362 = allocate_symtab (cust
, b
->get_current_subfile ()->name
);
11365 fe
.symtab
= b
->get_current_subfile ()->symtab
;
11366 tug_unshare
->symtabs
[i
] = fe
.symtab
;
11371 gdb_assert (m_builder
== nullptr);
11372 struct compunit_symtab
*cust
= tug_unshare
->compunit_symtab
;
11373 m_builder
.reset (new struct buildsym_compunit
11374 (COMPUNIT_OBJFILE (cust
), "",
11375 COMPUNIT_DIRNAME (cust
),
11376 compunit_language (cust
),
11378 list_in_scope
= get_builder ()->get_file_symbols ();
11380 auto &file_names
= line_header
->file_names ();
11381 for (i
= 0; i
< file_names
.size (); ++i
)
11383 file_entry
&fe
= file_names
[i
];
11384 fe
.symtab
= tug_unshare
->symtabs
[i
];
11388 /* The main symtab is allocated last. Type units don't have DW_AT_name
11389 so they don't have a "real" (so to speak) symtab anyway.
11390 There is later code that will assign the main symtab to all symbols
11391 that don't have one. We need to handle the case of a symbol with a
11392 missing symtab (DW_AT_decl_file) anyway. */
11395 /* Process DW_TAG_type_unit.
11396 For TUs we want to skip the first top level sibling if it's not the
11397 actual type being defined by this TU. In this case the first top
11398 level sibling is there to provide context only. */
11401 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11403 struct die_info
*child_die
;
11405 prepare_one_comp_unit (cu
, die
, language_minimal
);
11407 /* Initialize (or reinitialize) the machinery for building symtabs.
11408 We do this before processing child DIEs, so that the line header table
11409 is available for DW_AT_decl_file. */
11410 cu
->setup_type_unit_groups (die
);
11412 if (die
->child
!= NULL
)
11414 child_die
= die
->child
;
11415 while (child_die
&& child_die
->tag
)
11417 process_die (child_die
, cu
);
11418 child_die
= child_die
->sibling
;
11425 http://gcc.gnu.org/wiki/DebugFission
11426 http://gcc.gnu.org/wiki/DebugFissionDWP
11428 To simplify handling of both DWO files ("object" files with the DWARF info)
11429 and DWP files (a file with the DWOs packaged up into one file), we treat
11430 DWP files as having a collection of virtual DWO files. */
11433 hash_dwo_file (const void *item
)
11435 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11438 hash
= htab_hash_string (dwo_file
->dwo_name
);
11439 if (dwo_file
->comp_dir
!= NULL
)
11440 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11445 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11447 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11448 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11450 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11452 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11453 return lhs
->comp_dir
== rhs
->comp_dir
;
11454 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11457 /* Allocate a hash table for DWO files. */
11460 allocate_dwo_file_hash_table ()
11462 auto delete_dwo_file
= [] (void *item
)
11464 struct dwo_file
*dwo_file
= (struct dwo_file
*) item
;
11469 return htab_up (htab_create_alloc (41,
11476 /* Lookup DWO file DWO_NAME. */
11479 lookup_dwo_file_slot (dwarf2_per_objfile
*per_objfile
,
11480 const char *dwo_name
,
11481 const char *comp_dir
)
11483 struct dwo_file find_entry
;
11486 if (per_objfile
->per_bfd
->dwo_files
== NULL
)
11487 per_objfile
->per_bfd
->dwo_files
= allocate_dwo_file_hash_table ();
11489 find_entry
.dwo_name
= dwo_name
;
11490 find_entry
.comp_dir
= comp_dir
;
11491 slot
= htab_find_slot (per_objfile
->per_bfd
->dwo_files
.get (), &find_entry
,
11498 hash_dwo_unit (const void *item
)
11500 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11502 /* This drops the top 32 bits of the id, but is ok for a hash. */
11503 return dwo_unit
->signature
;
11507 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11509 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11510 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11512 /* The signature is assumed to be unique within the DWO file.
11513 So while object file CU dwo_id's always have the value zero,
11514 that's OK, assuming each object file DWO file has only one CU,
11515 and that's the rule for now. */
11516 return lhs
->signature
== rhs
->signature
;
11519 /* Allocate a hash table for DWO CUs,TUs.
11520 There is one of these tables for each of CUs,TUs for each DWO file. */
11523 allocate_dwo_unit_table ()
11525 /* Start out with a pretty small number.
11526 Generally DWO files contain only one CU and maybe some TUs. */
11527 return htab_up (htab_create_alloc (3,
11530 NULL
, xcalloc
, xfree
));
11533 /* die_reader_func for create_dwo_cu. */
11536 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11537 const gdb_byte
*info_ptr
,
11538 struct die_info
*comp_unit_die
,
11539 struct dwo_file
*dwo_file
,
11540 struct dwo_unit
*dwo_unit
)
11542 struct dwarf2_cu
*cu
= reader
->cu
;
11543 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11544 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11546 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
11547 if (!signature
.has_value ())
11549 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11550 " its dwo_id [in module %s]"),
11551 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11555 dwo_unit
->dwo_file
= dwo_file
;
11556 dwo_unit
->signature
= *signature
;
11557 dwo_unit
->section
= section
;
11558 dwo_unit
->sect_off
= sect_off
;
11559 dwo_unit
->length
= cu
->per_cu
->length
;
11561 dwarf_read_debug_printf (" offset %s, dwo_id %s",
11562 sect_offset_str (sect_off
),
11563 hex_string (dwo_unit
->signature
));
11566 /* Create the dwo_units for the CUs in a DWO_FILE.
11567 Note: This function processes DWO files only, not DWP files. */
11570 create_cus_hash_table (dwarf2_per_objfile
*per_objfile
,
11571 dwarf2_cu
*cu
, struct dwo_file
&dwo_file
,
11572 dwarf2_section_info
§ion
, htab_up
&cus_htab
)
11574 struct objfile
*objfile
= per_objfile
->objfile
;
11575 dwarf2_per_bfd
*per_bfd
= per_objfile
->per_bfd
;
11576 const gdb_byte
*info_ptr
, *end_ptr
;
11578 section
.read (objfile
);
11579 info_ptr
= section
.buffer
;
11581 if (info_ptr
== NULL
)
11584 dwarf_read_debug_printf ("Reading %s for %s:",
11585 section
.get_name (),
11586 section
.get_file_name ());
11588 end_ptr
= info_ptr
+ section
.size
;
11589 while (info_ptr
< end_ptr
)
11591 struct dwarf2_per_cu_data per_cu
;
11592 struct dwo_unit read_unit
{};
11593 struct dwo_unit
*dwo_unit
;
11595 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11597 memset (&per_cu
, 0, sizeof (per_cu
));
11598 per_cu
.per_bfd
= per_bfd
;
11599 per_cu
.is_debug_types
= 0;
11600 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11601 per_cu
.section
= §ion
;
11603 cutu_reader
reader (&per_cu
, per_objfile
, cu
, &dwo_file
);
11604 if (!reader
.dummy_p
)
11605 create_dwo_cu_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
,
11606 &dwo_file
, &read_unit
);
11607 info_ptr
+= per_cu
.length
;
11609 // If the unit could not be parsed, skip it.
11610 if (read_unit
.dwo_file
== NULL
)
11613 if (cus_htab
== NULL
)
11614 cus_htab
= allocate_dwo_unit_table ();
11616 dwo_unit
= OBSTACK_ZALLOC (&per_bfd
->obstack
,
11618 *dwo_unit
= read_unit
;
11619 slot
= htab_find_slot (cus_htab
.get (), dwo_unit
, INSERT
);
11620 gdb_assert (slot
!= NULL
);
11623 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11624 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11626 complaint (_("debug cu entry at offset %s is duplicate to"
11627 " the entry at offset %s, signature %s"),
11628 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11629 hex_string (dwo_unit
->signature
));
11631 *slot
= (void *)dwo_unit
;
11635 /* DWP file .debug_{cu,tu}_index section format:
11636 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11637 [ref: http://dwarfstd.org/doc/DWARF5.pdf, sect 7.3.5 "DWARF Package Files"]
11639 DWP Versions 1 & 2 are older, pre-standard format versions. The first
11640 officially standard DWP format was published with DWARF v5 and is called
11641 Version 5. There are no versions 3 or 4.
11645 Both index sections have the same format, and serve to map a 64-bit
11646 signature to a set of section numbers. Each section begins with a header,
11647 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11648 indexes, and a pool of 32-bit section numbers. The index sections will be
11649 aligned at 8-byte boundaries in the file.
11651 The index section header consists of:
11653 V, 32 bit version number
11655 N, 32 bit number of compilation units or type units in the index
11656 M, 32 bit number of slots in the hash table
11658 Numbers are recorded using the byte order of the application binary.
11660 The hash table begins at offset 16 in the section, and consists of an array
11661 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11662 order of the application binary). Unused slots in the hash table are 0.
11663 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11665 The parallel table begins immediately after the hash table
11666 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11667 array of 32-bit indexes (using the byte order of the application binary),
11668 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11669 table contains a 32-bit index into the pool of section numbers. For unused
11670 hash table slots, the corresponding entry in the parallel table will be 0.
11672 The pool of section numbers begins immediately following the hash table
11673 (at offset 16 + 12 * M from the beginning of the section). The pool of
11674 section numbers consists of an array of 32-bit words (using the byte order
11675 of the application binary). Each item in the array is indexed starting
11676 from 0. The hash table entry provides the index of the first section
11677 number in the set. Additional section numbers in the set follow, and the
11678 set is terminated by a 0 entry (section number 0 is not used in ELF).
11680 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11681 section must be the first entry in the set, and the .debug_abbrev.dwo must
11682 be the second entry. Other members of the set may follow in any order.
11686 DWP Versions 2 and 5:
11688 DWP Versions 2 and 5 combine all the .debug_info, etc. sections into one,
11689 and the entries in the index tables are now offsets into these sections.
11690 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11693 Index Section Contents:
11695 Hash Table of Signatures dwp_hash_table.hash_table
11696 Parallel Table of Indices dwp_hash_table.unit_table
11697 Table of Section Offsets dwp_hash_table.{v2|v5}.{section_ids,offsets}
11698 Table of Section Sizes dwp_hash_table.{v2|v5}.sizes
11700 The index section header consists of:
11702 V, 32 bit version number
11703 L, 32 bit number of columns in the table of section offsets
11704 N, 32 bit number of compilation units or type units in the index
11705 M, 32 bit number of slots in the hash table
11707 Numbers are recorded using the byte order of the application binary.
11709 The hash table has the same format as version 1.
11710 The parallel table of indices has the same format as version 1,
11711 except that the entries are origin-1 indices into the table of sections
11712 offsets and the table of section sizes.
11714 The table of offsets begins immediately following the parallel table
11715 (at offset 16 + 12 * M from the beginning of the section). The table is
11716 a two-dimensional array of 32-bit words (using the byte order of the
11717 application binary), with L columns and N+1 rows, in row-major order.
11718 Each row in the array is indexed starting from 0. The first row provides
11719 a key to the remaining rows: each column in this row provides an identifier
11720 for a debug section, and the offsets in the same column of subsequent rows
11721 refer to that section. The section identifiers for Version 2 are:
11723 DW_SECT_INFO 1 .debug_info.dwo
11724 DW_SECT_TYPES 2 .debug_types.dwo
11725 DW_SECT_ABBREV 3 .debug_abbrev.dwo
11726 DW_SECT_LINE 4 .debug_line.dwo
11727 DW_SECT_LOC 5 .debug_loc.dwo
11728 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
11729 DW_SECT_MACINFO 7 .debug_macinfo.dwo
11730 DW_SECT_MACRO 8 .debug_macro.dwo
11732 The section identifiers for Version 5 are:
11734 DW_SECT_INFO_V5 1 .debug_info.dwo
11735 DW_SECT_RESERVED_V5 2 --
11736 DW_SECT_ABBREV_V5 3 .debug_abbrev.dwo
11737 DW_SECT_LINE_V5 4 .debug_line.dwo
11738 DW_SECT_LOCLISTS_V5 5 .debug_loclists.dwo
11739 DW_SECT_STR_OFFSETS_V5 6 .debug_str_offsets.dwo
11740 DW_SECT_MACRO_V5 7 .debug_macro.dwo
11741 DW_SECT_RNGLISTS_V5 8 .debug_rnglists.dwo
11743 The offsets provided by the CU and TU index sections are the base offsets
11744 for the contributions made by each CU or TU to the corresponding section
11745 in the package file. Each CU and TU header contains an abbrev_offset
11746 field, used to find the abbreviations table for that CU or TU within the
11747 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
11748 be interpreted as relative to the base offset given in the index section.
11749 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
11750 should be interpreted as relative to the base offset for .debug_line.dwo,
11751 and offsets into other debug sections obtained from DWARF attributes should
11752 also be interpreted as relative to the corresponding base offset.
11754 The table of sizes begins immediately following the table of offsets.
11755 Like the table of offsets, it is a two-dimensional array of 32-bit words,
11756 with L columns and N rows, in row-major order. Each row in the array is
11757 indexed starting from 1 (row 0 is shared by the two tables).
11761 Hash table lookup is handled the same in version 1 and 2:
11763 We assume that N and M will not exceed 2^32 - 1.
11764 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
11766 Given a 64-bit compilation unit signature or a type signature S, an entry
11767 in the hash table is located as follows:
11769 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
11770 the low-order k bits all set to 1.
11772 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
11774 3) If the hash table entry at index H matches the signature, use that
11775 entry. If the hash table entry at index H is unused (all zeroes),
11776 terminate the search: the signature is not present in the table.
11778 4) Let H = (H + H') modulo M. Repeat at Step 3.
11780 Because M > N and H' and M are relatively prime, the search is guaranteed
11781 to stop at an unused slot or find the match. */
11783 /* Create a hash table to map DWO IDs to their CU/TU entry in
11784 .debug_{info,types}.dwo in DWP_FILE.
11785 Returns NULL if there isn't one.
11786 Note: This function processes DWP files only, not DWO files. */
11788 static struct dwp_hash_table
*
11789 create_dwp_hash_table (dwarf2_per_objfile
*per_objfile
,
11790 struct dwp_file
*dwp_file
, int is_debug_types
)
11792 struct objfile
*objfile
= per_objfile
->objfile
;
11793 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11794 const gdb_byte
*index_ptr
, *index_end
;
11795 struct dwarf2_section_info
*index
;
11796 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
11797 struct dwp_hash_table
*htab
;
11799 if (is_debug_types
)
11800 index
= &dwp_file
->sections
.tu_index
;
11802 index
= &dwp_file
->sections
.cu_index
;
11804 if (index
->empty ())
11806 index
->read (objfile
);
11808 index_ptr
= index
->buffer
;
11809 index_end
= index_ptr
+ index
->size
;
11811 /* For Version 5, the version is really 2 bytes of data & 2 bytes of padding.
11812 For now it's safe to just read 4 bytes (particularly as it's difficult to
11813 tell if you're dealing with Version 5 before you've read the version). */
11814 version
= read_4_bytes (dbfd
, index_ptr
);
11816 if (version
== 2 || version
== 5)
11817 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
11821 nr_units
= read_4_bytes (dbfd
, index_ptr
);
11823 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
11826 if (version
!= 1 && version
!= 2 && version
!= 5)
11828 error (_("Dwarf Error: unsupported DWP file version (%s)"
11829 " [in module %s]"),
11830 pulongest (version
), dwp_file
->name
);
11832 if (nr_slots
!= (nr_slots
& -nr_slots
))
11834 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
11835 " is not power of 2 [in module %s]"),
11836 pulongest (nr_slots
), dwp_file
->name
);
11839 htab
= OBSTACK_ZALLOC (&per_objfile
->per_bfd
->obstack
, struct dwp_hash_table
);
11840 htab
->version
= version
;
11841 htab
->nr_columns
= nr_columns
;
11842 htab
->nr_units
= nr_units
;
11843 htab
->nr_slots
= nr_slots
;
11844 htab
->hash_table
= index_ptr
;
11845 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
11847 /* Exit early if the table is empty. */
11848 if (nr_slots
== 0 || nr_units
== 0
11849 || (version
== 2 && nr_columns
== 0)
11850 || (version
== 5 && nr_columns
== 0))
11852 /* All must be zero. */
11853 if (nr_slots
!= 0 || nr_units
!= 0
11854 || (version
== 2 && nr_columns
!= 0)
11855 || (version
== 5 && nr_columns
!= 0))
11857 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
11858 " all zero [in modules %s]"),
11866 htab
->section_pool
.v1
.indices
=
11867 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11868 /* It's harder to decide whether the section is too small in v1.
11869 V1 is deprecated anyway so we punt. */
11871 else if (version
== 2)
11873 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11874 int *ids
= htab
->section_pool
.v2
.section_ids
;
11875 size_t sizeof_ids
= sizeof (htab
->section_pool
.v2
.section_ids
);
11876 /* Reverse map for error checking. */
11877 int ids_seen
[DW_SECT_MAX
+ 1];
11880 if (nr_columns
< 2)
11882 error (_("Dwarf Error: bad DWP hash table, too few columns"
11883 " in section table [in module %s]"),
11886 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
11888 error (_("Dwarf Error: bad DWP hash table, too many columns"
11889 " in section table [in module %s]"),
11892 memset (ids
, 255, sizeof_ids
);
11893 memset (ids_seen
, 255, sizeof (ids_seen
));
11894 for (i
= 0; i
< nr_columns
; ++i
)
11896 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
11898 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
11900 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
11901 " in section table [in module %s]"),
11902 id
, dwp_file
->name
);
11904 if (ids_seen
[id
] != -1)
11906 error (_("Dwarf Error: bad DWP hash table, duplicate section"
11907 " id %d in section table [in module %s]"),
11908 id
, dwp_file
->name
);
11913 /* Must have exactly one info or types section. */
11914 if (((ids_seen
[DW_SECT_INFO
] != -1)
11915 + (ids_seen
[DW_SECT_TYPES
] != -1))
11918 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
11919 " DWO info/types section [in module %s]"),
11922 /* Must have an abbrev section. */
11923 if (ids_seen
[DW_SECT_ABBREV
] == -1)
11925 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
11926 " section [in module %s]"),
11929 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
11930 htab
->section_pool
.v2
.sizes
=
11931 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
11932 * nr_units
* nr_columns
);
11933 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
11934 * nr_units
* nr_columns
))
11937 error (_("Dwarf Error: DWP index section is corrupt (too small)"
11938 " [in module %s]"),
11942 else /* version == 5 */
11944 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11945 int *ids
= htab
->section_pool
.v5
.section_ids
;
11946 size_t sizeof_ids
= sizeof (htab
->section_pool
.v5
.section_ids
);
11947 /* Reverse map for error checking. */
11948 int ids_seen
[DW_SECT_MAX_V5
+ 1];
11950 if (nr_columns
< 2)
11952 error (_("Dwarf Error: bad DWP hash table, too few columns"
11953 " in section table [in module %s]"),
11956 if (nr_columns
> MAX_NR_V5_DWO_SECTIONS
)
11958 error (_("Dwarf Error: bad DWP hash table, too many columns"
11959 " in section table [in module %s]"),
11962 memset (ids
, 255, sizeof_ids
);
11963 memset (ids_seen
, 255, sizeof (ids_seen
));
11964 for (int i
= 0; i
< nr_columns
; ++i
)
11966 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
11968 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX_V5
)
11970 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
11971 " in section table [in module %s]"),
11972 id
, dwp_file
->name
);
11974 if (ids_seen
[id
] != -1)
11976 error (_("Dwarf Error: bad DWP hash table, duplicate section"
11977 " id %d in section table [in module %s]"),
11978 id
, dwp_file
->name
);
11983 /* Must have seen an info section. */
11984 if (ids_seen
[DW_SECT_INFO_V5
] == -1)
11986 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
11987 " DWO info/types section [in module %s]"),
11990 /* Must have an abbrev section. */
11991 if (ids_seen
[DW_SECT_ABBREV_V5
] == -1)
11993 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
11994 " section [in module %s]"),
11997 htab
->section_pool
.v5
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
11998 htab
->section_pool
.v5
.sizes
11999 = htab
->section_pool
.v5
.offsets
+ (sizeof (uint32_t)
12000 * nr_units
* nr_columns
);
12001 if ((htab
->section_pool
.v5
.sizes
+ (sizeof (uint32_t)
12002 * nr_units
* nr_columns
))
12005 error (_("Dwarf Error: DWP index section is corrupt (too small)"
12006 " [in module %s]"),
12014 /* Update SECTIONS with the data from SECTP.
12016 This function is like the other "locate" section routines, but in
12017 this context the sections to read comes from the DWP V1 hash table,
12018 not the full ELF section table.
12020 The result is non-zero for success, or zero if an error was found. */
12023 locate_v1_virtual_dwo_sections (asection
*sectp
,
12024 struct virtual_v1_dwo_sections
*sections
)
12026 const struct dwop_section_names
*names
= &dwop_section_names
;
12028 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12030 /* There can be only one. */
12031 if (sections
->abbrev
.s
.section
!= NULL
)
12033 sections
->abbrev
.s
.section
= sectp
;
12034 sections
->abbrev
.size
= bfd_section_size (sectp
);
12036 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
12037 || section_is_p (sectp
->name
, &names
->types_dwo
))
12039 /* There can be only one. */
12040 if (sections
->info_or_types
.s
.section
!= NULL
)
12042 sections
->info_or_types
.s
.section
= sectp
;
12043 sections
->info_or_types
.size
= bfd_section_size (sectp
);
12045 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12047 /* There can be only one. */
12048 if (sections
->line
.s
.section
!= NULL
)
12050 sections
->line
.s
.section
= sectp
;
12051 sections
->line
.size
= bfd_section_size (sectp
);
12053 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12055 /* There can be only one. */
12056 if (sections
->loc
.s
.section
!= NULL
)
12058 sections
->loc
.s
.section
= sectp
;
12059 sections
->loc
.size
= bfd_section_size (sectp
);
12061 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12063 /* There can be only one. */
12064 if (sections
->macinfo
.s
.section
!= NULL
)
12066 sections
->macinfo
.s
.section
= sectp
;
12067 sections
->macinfo
.size
= bfd_section_size (sectp
);
12069 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12071 /* There can be only one. */
12072 if (sections
->macro
.s
.section
!= NULL
)
12074 sections
->macro
.s
.section
= sectp
;
12075 sections
->macro
.size
= bfd_section_size (sectp
);
12077 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12079 /* There can be only one. */
12080 if (sections
->str_offsets
.s
.section
!= NULL
)
12082 sections
->str_offsets
.s
.section
= sectp
;
12083 sections
->str_offsets
.size
= bfd_section_size (sectp
);
12087 /* No other kind of section is valid. */
12094 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12095 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12096 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12097 This is for DWP version 1 files. */
12099 static struct dwo_unit
*
12100 create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
*per_objfile
,
12101 struct dwp_file
*dwp_file
,
12102 uint32_t unit_index
,
12103 const char *comp_dir
,
12104 ULONGEST signature
, int is_debug_types
)
12106 const struct dwp_hash_table
*dwp_htab
=
12107 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12108 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12109 const char *kind
= is_debug_types
? "TU" : "CU";
12110 struct dwo_file
*dwo_file
;
12111 struct dwo_unit
*dwo_unit
;
12112 struct virtual_v1_dwo_sections sections
;
12113 void **dwo_file_slot
;
12116 gdb_assert (dwp_file
->version
== 1);
12118 dwarf_read_debug_printf ("Reading %s %s/%s in DWP V1 file: %s",
12119 kind
, pulongest (unit_index
), hex_string (signature
),
12122 /* Fetch the sections of this DWO unit.
12123 Put a limit on the number of sections we look for so that bad data
12124 doesn't cause us to loop forever. */
12126 #define MAX_NR_V1_DWO_SECTIONS \
12127 (1 /* .debug_info or .debug_types */ \
12128 + 1 /* .debug_abbrev */ \
12129 + 1 /* .debug_line */ \
12130 + 1 /* .debug_loc */ \
12131 + 1 /* .debug_str_offsets */ \
12132 + 1 /* .debug_macro or .debug_macinfo */ \
12133 + 1 /* trailing zero */)
12135 memset (§ions
, 0, sizeof (sections
));
12137 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
12140 uint32_t section_nr
=
12141 read_4_bytes (dbfd
,
12142 dwp_htab
->section_pool
.v1
.indices
12143 + (unit_index
+ i
) * sizeof (uint32_t));
12145 if (section_nr
== 0)
12147 if (section_nr
>= dwp_file
->num_sections
)
12149 error (_("Dwarf Error: bad DWP hash table, section number too large"
12150 " [in module %s]"),
12154 sectp
= dwp_file
->elf_sections
[section_nr
];
12155 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
12157 error (_("Dwarf Error: bad DWP hash table, invalid section found"
12158 " [in module %s]"),
12164 || sections
.info_or_types
.empty ()
12165 || sections
.abbrev
.empty ())
12167 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
12168 " [in module %s]"),
12171 if (i
== MAX_NR_V1_DWO_SECTIONS
)
12173 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
12174 " [in module %s]"),
12178 /* It's easier for the rest of the code if we fake a struct dwo_file and
12179 have dwo_unit "live" in that. At least for now.
12181 The DWP file can be made up of a random collection of CUs and TUs.
12182 However, for each CU + set of TUs that came from the same original DWO
12183 file, we can combine them back into a virtual DWO file to save space
12184 (fewer struct dwo_file objects to allocate). Remember that for really
12185 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12187 std::string virtual_dwo_name
=
12188 string_printf ("virtual-dwo/%d-%d-%d-%d",
12189 sections
.abbrev
.get_id (),
12190 sections
.line
.get_id (),
12191 sections
.loc
.get_id (),
12192 sections
.str_offsets
.get_id ());
12193 /* Can we use an existing virtual DWO file? */
12194 dwo_file_slot
= lookup_dwo_file_slot (per_objfile
, virtual_dwo_name
.c_str (),
12196 /* Create one if necessary. */
12197 if (*dwo_file_slot
== NULL
)
12199 dwarf_read_debug_printf ("Creating virtual DWO: %s",
12200 virtual_dwo_name
.c_str ());
12202 dwo_file
= new struct dwo_file
;
12203 dwo_file
->dwo_name
= per_objfile
->objfile
->intern (virtual_dwo_name
);
12204 dwo_file
->comp_dir
= comp_dir
;
12205 dwo_file
->sections
.abbrev
= sections
.abbrev
;
12206 dwo_file
->sections
.line
= sections
.line
;
12207 dwo_file
->sections
.loc
= sections
.loc
;
12208 dwo_file
->sections
.macinfo
= sections
.macinfo
;
12209 dwo_file
->sections
.macro
= sections
.macro
;
12210 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
12211 /* The "str" section is global to the entire DWP file. */
12212 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12213 /* The info or types section is assigned below to dwo_unit,
12214 there's no need to record it in dwo_file.
12215 Also, we can't simply record type sections in dwo_file because
12216 we record a pointer into the vector in dwo_unit. As we collect more
12217 types we'll grow the vector and eventually have to reallocate space
12218 for it, invalidating all copies of pointers into the previous
12220 *dwo_file_slot
= dwo_file
;
12224 dwarf_read_debug_printf ("Using existing virtual DWO: %s",
12225 virtual_dwo_name
.c_str ());
12227 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12230 dwo_unit
= OBSTACK_ZALLOC (&per_objfile
->per_bfd
->obstack
, struct dwo_unit
);
12231 dwo_unit
->dwo_file
= dwo_file
;
12232 dwo_unit
->signature
= signature
;
12233 dwo_unit
->section
=
12234 XOBNEW (&per_objfile
->per_bfd
->obstack
, struct dwarf2_section_info
);
12235 *dwo_unit
->section
= sections
.info_or_types
;
12236 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12241 /* Subroutine of create_dwo_unit_in_dwp_v2 and create_dwo_unit_in_dwp_v5 to
12242 simplify them. Given a pointer to the containing section SECTION, and
12243 OFFSET,SIZE of the piece within that section used by a TU/CU, return a
12244 virtual section of just that piece. */
12246 static struct dwarf2_section_info
12247 create_dwp_v2_or_v5_section (dwarf2_per_objfile
*per_objfile
,
12248 struct dwarf2_section_info
*section
,
12249 bfd_size_type offset
, bfd_size_type size
)
12251 struct dwarf2_section_info result
;
12254 gdb_assert (section
!= NULL
);
12255 gdb_assert (!section
->is_virtual
);
12257 memset (&result
, 0, sizeof (result
));
12258 result
.s
.containing_section
= section
;
12259 result
.is_virtual
= true;
12264 sectp
= section
->get_bfd_section ();
12266 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
12267 bounds of the real section. This is a pretty-rare event, so just
12268 flag an error (easier) instead of a warning and trying to cope. */
12270 || offset
+ size
> bfd_section_size (sectp
))
12272 error (_("Dwarf Error: Bad DWP V2 or V5 section info, doesn't fit"
12273 " in section %s [in module %s]"),
12274 sectp
? bfd_section_name (sectp
) : "<unknown>",
12275 objfile_name (per_objfile
->objfile
));
12278 result
.virtual_offset
= offset
;
12279 result
.size
= size
;
12283 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12284 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12285 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12286 This is for DWP version 2 files. */
12288 static struct dwo_unit
*
12289 create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
*per_objfile
,
12290 struct dwp_file
*dwp_file
,
12291 uint32_t unit_index
,
12292 const char *comp_dir
,
12293 ULONGEST signature
, int is_debug_types
)
12295 const struct dwp_hash_table
*dwp_htab
=
12296 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12297 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12298 const char *kind
= is_debug_types
? "TU" : "CU";
12299 struct dwo_file
*dwo_file
;
12300 struct dwo_unit
*dwo_unit
;
12301 struct virtual_v2_or_v5_dwo_sections sections
;
12302 void **dwo_file_slot
;
12305 gdb_assert (dwp_file
->version
== 2);
12307 dwarf_read_debug_printf ("Reading %s %s/%s in DWP V2 file: %s",
12308 kind
, pulongest (unit_index
), hex_string (signature
),
12311 /* Fetch the section offsets of this DWO unit. */
12313 memset (§ions
, 0, sizeof (sections
));
12315 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12317 uint32_t offset
= read_4_bytes (dbfd
,
12318 dwp_htab
->section_pool
.v2
.offsets
12319 + (((unit_index
- 1) * dwp_htab
->nr_columns
12321 * sizeof (uint32_t)));
12322 uint32_t size
= read_4_bytes (dbfd
,
12323 dwp_htab
->section_pool
.v2
.sizes
12324 + (((unit_index
- 1) * dwp_htab
->nr_columns
12326 * sizeof (uint32_t)));
12328 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12331 case DW_SECT_TYPES
:
12332 sections
.info_or_types_offset
= offset
;
12333 sections
.info_or_types_size
= size
;
12335 case DW_SECT_ABBREV
:
12336 sections
.abbrev_offset
= offset
;
12337 sections
.abbrev_size
= size
;
12340 sections
.line_offset
= offset
;
12341 sections
.line_size
= size
;
12344 sections
.loc_offset
= offset
;
12345 sections
.loc_size
= size
;
12347 case DW_SECT_STR_OFFSETS
:
12348 sections
.str_offsets_offset
= offset
;
12349 sections
.str_offsets_size
= size
;
12351 case DW_SECT_MACINFO
:
12352 sections
.macinfo_offset
= offset
;
12353 sections
.macinfo_size
= size
;
12355 case DW_SECT_MACRO
:
12356 sections
.macro_offset
= offset
;
12357 sections
.macro_size
= size
;
12362 /* It's easier for the rest of the code if we fake a struct dwo_file and
12363 have dwo_unit "live" in that. At least for now.
12365 The DWP file can be made up of a random collection of CUs and TUs.
12366 However, for each CU + set of TUs that came from the same original DWO
12367 file, we can combine them back into a virtual DWO file to save space
12368 (fewer struct dwo_file objects to allocate). Remember that for really
12369 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12371 std::string virtual_dwo_name
=
12372 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12373 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12374 (long) (sections
.line_size
? sections
.line_offset
: 0),
12375 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12376 (long) (sections
.str_offsets_size
12377 ? sections
.str_offsets_offset
: 0));
12378 /* Can we use an existing virtual DWO file? */
12379 dwo_file_slot
= lookup_dwo_file_slot (per_objfile
, virtual_dwo_name
.c_str (),
12381 /* Create one if necessary. */
12382 if (*dwo_file_slot
== NULL
)
12384 dwarf_read_debug_printf ("Creating virtual DWO: %s",
12385 virtual_dwo_name
.c_str ());
12387 dwo_file
= new struct dwo_file
;
12388 dwo_file
->dwo_name
= per_objfile
->objfile
->intern (virtual_dwo_name
);
12389 dwo_file
->comp_dir
= comp_dir
;
12390 dwo_file
->sections
.abbrev
=
12391 create_dwp_v2_or_v5_section (per_objfile
, &dwp_file
->sections
.abbrev
,
12392 sections
.abbrev_offset
,
12393 sections
.abbrev_size
);
12394 dwo_file
->sections
.line
=
12395 create_dwp_v2_or_v5_section (per_objfile
, &dwp_file
->sections
.line
,
12396 sections
.line_offset
,
12397 sections
.line_size
);
12398 dwo_file
->sections
.loc
=
12399 create_dwp_v2_or_v5_section (per_objfile
, &dwp_file
->sections
.loc
,
12400 sections
.loc_offset
, sections
.loc_size
);
12401 dwo_file
->sections
.macinfo
=
12402 create_dwp_v2_or_v5_section (per_objfile
, &dwp_file
->sections
.macinfo
,
12403 sections
.macinfo_offset
,
12404 sections
.macinfo_size
);
12405 dwo_file
->sections
.macro
=
12406 create_dwp_v2_or_v5_section (per_objfile
, &dwp_file
->sections
.macro
,
12407 sections
.macro_offset
,
12408 sections
.macro_size
);
12409 dwo_file
->sections
.str_offsets
=
12410 create_dwp_v2_or_v5_section (per_objfile
,
12411 &dwp_file
->sections
.str_offsets
,
12412 sections
.str_offsets_offset
,
12413 sections
.str_offsets_size
);
12414 /* The "str" section is global to the entire DWP file. */
12415 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12416 /* The info or types section is assigned below to dwo_unit,
12417 there's no need to record it in dwo_file.
12418 Also, we can't simply record type sections in dwo_file because
12419 we record a pointer into the vector in dwo_unit. As we collect more
12420 types we'll grow the vector and eventually have to reallocate space
12421 for it, invalidating all copies of pointers into the previous
12423 *dwo_file_slot
= dwo_file
;
12427 dwarf_read_debug_printf ("Using existing virtual DWO: %s",
12428 virtual_dwo_name
.c_str ());
12430 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12433 dwo_unit
= OBSTACK_ZALLOC (&per_objfile
->per_bfd
->obstack
, struct dwo_unit
);
12434 dwo_unit
->dwo_file
= dwo_file
;
12435 dwo_unit
->signature
= signature
;
12436 dwo_unit
->section
=
12437 XOBNEW (&per_objfile
->per_bfd
->obstack
, struct dwarf2_section_info
);
12438 *dwo_unit
->section
= create_dwp_v2_or_v5_section
12441 ? &dwp_file
->sections
.types
12442 : &dwp_file
->sections
.info
,
12443 sections
.info_or_types_offset
,
12444 sections
.info_or_types_size
);
12445 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12450 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12451 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12452 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12453 This is for DWP version 5 files. */
12455 static struct dwo_unit
*
12456 create_dwo_unit_in_dwp_v5 (dwarf2_per_objfile
*per_objfile
,
12457 struct dwp_file
*dwp_file
,
12458 uint32_t unit_index
,
12459 const char *comp_dir
,
12460 ULONGEST signature
, int is_debug_types
)
12462 const struct dwp_hash_table
*dwp_htab
12463 = is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12464 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12465 const char *kind
= is_debug_types
? "TU" : "CU";
12466 struct dwo_file
*dwo_file
;
12467 struct dwo_unit
*dwo_unit
;
12468 struct virtual_v2_or_v5_dwo_sections sections
{};
12469 void **dwo_file_slot
;
12471 gdb_assert (dwp_file
->version
== 5);
12473 dwarf_read_debug_printf ("Reading %s %s/%s in DWP V5 file: %s",
12474 kind
, pulongest (unit_index
), hex_string (signature
),
12477 /* Fetch the section offsets of this DWO unit. */
12479 /* memset (§ions, 0, sizeof (sections)); */
12481 for (int i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12483 uint32_t offset
= read_4_bytes (dbfd
,
12484 dwp_htab
->section_pool
.v5
.offsets
12485 + (((unit_index
- 1)
12486 * dwp_htab
->nr_columns
12488 * sizeof (uint32_t)));
12489 uint32_t size
= read_4_bytes (dbfd
,
12490 dwp_htab
->section_pool
.v5
.sizes
12491 + (((unit_index
- 1) * dwp_htab
->nr_columns
12493 * sizeof (uint32_t)));
12495 switch (dwp_htab
->section_pool
.v5
.section_ids
[i
])
12497 case DW_SECT_ABBREV_V5
:
12498 sections
.abbrev_offset
= offset
;
12499 sections
.abbrev_size
= size
;
12501 case DW_SECT_INFO_V5
:
12502 sections
.info_or_types_offset
= offset
;
12503 sections
.info_or_types_size
= size
;
12505 case DW_SECT_LINE_V5
:
12506 sections
.line_offset
= offset
;
12507 sections
.line_size
= size
;
12509 case DW_SECT_LOCLISTS_V5
:
12510 sections
.loclists_offset
= offset
;
12511 sections
.loclists_size
= size
;
12513 case DW_SECT_MACRO_V5
:
12514 sections
.macro_offset
= offset
;
12515 sections
.macro_size
= size
;
12517 case DW_SECT_RNGLISTS_V5
:
12518 sections
.rnglists_offset
= offset
;
12519 sections
.rnglists_size
= size
;
12521 case DW_SECT_STR_OFFSETS_V5
:
12522 sections
.str_offsets_offset
= offset
;
12523 sections
.str_offsets_size
= size
;
12525 case DW_SECT_RESERVED_V5
:
12531 /* It's easier for the rest of the code if we fake a struct dwo_file and
12532 have dwo_unit "live" in that. At least for now.
12534 The DWP file can be made up of a random collection of CUs and TUs.
12535 However, for each CU + set of TUs that came from the same original DWO
12536 file, we can combine them back into a virtual DWO file to save space
12537 (fewer struct dwo_file objects to allocate). Remember that for really
12538 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12540 std::string virtual_dwo_name
=
12541 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld-%ld-%ld",
12542 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12543 (long) (sections
.line_size
? sections
.line_offset
: 0),
12544 (long) (sections
.loclists_size
? sections
.loclists_offset
: 0),
12545 (long) (sections
.str_offsets_size
12546 ? sections
.str_offsets_offset
: 0),
12547 (long) (sections
.macro_size
? sections
.macro_offset
: 0),
12548 (long) (sections
.rnglists_size
? sections
.rnglists_offset
: 0));
12549 /* Can we use an existing virtual DWO file? */
12550 dwo_file_slot
= lookup_dwo_file_slot (per_objfile
,
12551 virtual_dwo_name
.c_str (),
12553 /* Create one if necessary. */
12554 if (*dwo_file_slot
== NULL
)
12556 dwarf_read_debug_printf ("Creating virtual DWO: %s",
12557 virtual_dwo_name
.c_str ());
12559 dwo_file
= new struct dwo_file
;
12560 dwo_file
->dwo_name
= per_objfile
->objfile
->intern (virtual_dwo_name
);
12561 dwo_file
->comp_dir
= comp_dir
;
12562 dwo_file
->sections
.abbrev
=
12563 create_dwp_v2_or_v5_section (per_objfile
,
12564 &dwp_file
->sections
.abbrev
,
12565 sections
.abbrev_offset
,
12566 sections
.abbrev_size
);
12567 dwo_file
->sections
.line
=
12568 create_dwp_v2_or_v5_section (per_objfile
,
12569 &dwp_file
->sections
.line
,
12570 sections
.line_offset
, sections
.line_size
);
12571 dwo_file
->sections
.macro
=
12572 create_dwp_v2_or_v5_section (per_objfile
,
12573 &dwp_file
->sections
.macro
,
12574 sections
.macro_offset
,
12575 sections
.macro_size
);
12576 dwo_file
->sections
.loclists
=
12577 create_dwp_v2_or_v5_section (per_objfile
,
12578 &dwp_file
->sections
.loclists
,
12579 sections
.loclists_offset
,
12580 sections
.loclists_size
);
12581 dwo_file
->sections
.rnglists
=
12582 create_dwp_v2_or_v5_section (per_objfile
,
12583 &dwp_file
->sections
.rnglists
,
12584 sections
.rnglists_offset
,
12585 sections
.rnglists_size
);
12586 dwo_file
->sections
.str_offsets
=
12587 create_dwp_v2_or_v5_section (per_objfile
,
12588 &dwp_file
->sections
.str_offsets
,
12589 sections
.str_offsets_offset
,
12590 sections
.str_offsets_size
);
12591 /* The "str" section is global to the entire DWP file. */
12592 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12593 /* The info or types section is assigned below to dwo_unit,
12594 there's no need to record it in dwo_file.
12595 Also, we can't simply record type sections in dwo_file because
12596 we record a pointer into the vector in dwo_unit. As we collect more
12597 types we'll grow the vector and eventually have to reallocate space
12598 for it, invalidating all copies of pointers into the previous
12600 *dwo_file_slot
= dwo_file
;
12604 dwarf_read_debug_printf ("Using existing virtual DWO: %s",
12605 virtual_dwo_name
.c_str ());
12607 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12610 dwo_unit
= OBSTACK_ZALLOC (&per_objfile
->per_bfd
->obstack
, struct dwo_unit
);
12611 dwo_unit
->dwo_file
= dwo_file
;
12612 dwo_unit
->signature
= signature
;
12614 = XOBNEW (&per_objfile
->per_bfd
->obstack
, struct dwarf2_section_info
);
12615 *dwo_unit
->section
= create_dwp_v2_or_v5_section (per_objfile
,
12616 &dwp_file
->sections
.info
,
12617 sections
.info_or_types_offset
,
12618 sections
.info_or_types_size
);
12619 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12624 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12625 Returns NULL if the signature isn't found. */
12627 static struct dwo_unit
*
12628 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
*per_objfile
,
12629 struct dwp_file
*dwp_file
, const char *comp_dir
,
12630 ULONGEST signature
, int is_debug_types
)
12632 const struct dwp_hash_table
*dwp_htab
=
12633 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12634 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12635 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12636 uint32_t hash
= signature
& mask
;
12637 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12640 struct dwo_unit find_dwo_cu
;
12642 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12643 find_dwo_cu
.signature
= signature
;
12644 slot
= htab_find_slot (is_debug_types
12645 ? dwp_file
->loaded_tus
.get ()
12646 : dwp_file
->loaded_cus
.get (),
12647 &find_dwo_cu
, INSERT
);
12650 return (struct dwo_unit
*) *slot
;
12652 /* Use a for loop so that we don't loop forever on bad debug info. */
12653 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12655 ULONGEST signature_in_table
;
12657 signature_in_table
=
12658 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12659 if (signature_in_table
== signature
)
12661 uint32_t unit_index
=
12662 read_4_bytes (dbfd
,
12663 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12665 if (dwp_file
->version
== 1)
12667 *slot
= create_dwo_unit_in_dwp_v1 (per_objfile
, dwp_file
,
12668 unit_index
, comp_dir
,
12669 signature
, is_debug_types
);
12671 else if (dwp_file
->version
== 2)
12673 *slot
= create_dwo_unit_in_dwp_v2 (per_objfile
, dwp_file
,
12674 unit_index
, comp_dir
,
12675 signature
, is_debug_types
);
12677 else /* version == 5 */
12679 *slot
= create_dwo_unit_in_dwp_v5 (per_objfile
, dwp_file
,
12680 unit_index
, comp_dir
,
12681 signature
, is_debug_types
);
12683 return (struct dwo_unit
*) *slot
;
12685 if (signature_in_table
== 0)
12687 hash
= (hash
+ hash2
) & mask
;
12690 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12691 " [in module %s]"),
12695 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12696 Open the file specified by FILE_NAME and hand it off to BFD for
12697 preliminary analysis. Return a newly initialized bfd *, which
12698 includes a canonicalized copy of FILE_NAME.
12699 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12700 SEARCH_CWD is true if the current directory is to be searched.
12701 It will be searched before debug-file-directory.
12702 If successful, the file is added to the bfd include table of the
12703 objfile's bfd (see gdb_bfd_record_inclusion).
12704 If unable to find/open the file, return NULL.
12705 NOTE: This function is derived from symfile_bfd_open. */
12707 static gdb_bfd_ref_ptr
12708 try_open_dwop_file (dwarf2_per_objfile
*per_objfile
,
12709 const char *file_name
, int is_dwp
, int search_cwd
)
12712 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12713 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12714 to debug_file_directory. */
12715 const char *search_path
;
12716 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12718 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12721 if (*debug_file_directory
!= '\0')
12723 search_path_holder
.reset (concat (".", dirname_separator_string
,
12724 debug_file_directory
,
12726 search_path
= search_path_holder
.get ();
12732 search_path
= debug_file_directory
;
12734 openp_flags flags
= OPF_RETURN_REALPATH
;
12736 flags
|= OPF_SEARCH_IN_PATH
;
12738 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12739 desc
= openp (search_path
, flags
, file_name
,
12740 O_RDONLY
| O_BINARY
, &absolute_name
);
12744 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12746 if (sym_bfd
== NULL
)
12748 bfd_set_cacheable (sym_bfd
.get (), 1);
12750 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12753 /* Success. Record the bfd as having been included by the objfile's bfd.
12754 This is important because things like demangled_names_hash lives in the
12755 objfile's per_bfd space and may have references to things like symbol
12756 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12757 gdb_bfd_record_inclusion (per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12762 /* Try to open DWO file FILE_NAME.
12763 COMP_DIR is the DW_AT_comp_dir attribute.
12764 The result is the bfd handle of the file.
12765 If there is a problem finding or opening the file, return NULL.
12766 Upon success, the canonicalized path of the file is stored in the bfd,
12767 same as symfile_bfd_open. */
12769 static gdb_bfd_ref_ptr
12770 open_dwo_file (dwarf2_per_objfile
*per_objfile
,
12771 const char *file_name
, const char *comp_dir
)
12773 if (IS_ABSOLUTE_PATH (file_name
))
12774 return try_open_dwop_file (per_objfile
, file_name
,
12775 0 /*is_dwp*/, 0 /*search_cwd*/);
12777 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12779 if (comp_dir
!= NULL
)
12781 gdb::unique_xmalloc_ptr
<char> path_to_try
12782 (concat (comp_dir
, SLASH_STRING
, file_name
, (char *) NULL
));
12784 /* NOTE: If comp_dir is a relative path, this will also try the
12785 search path, which seems useful. */
12786 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (per_objfile
, path_to_try
.get (),
12788 1 /*search_cwd*/));
12793 /* That didn't work, try debug-file-directory, which, despite its name,
12794 is a list of paths. */
12796 if (*debug_file_directory
== '\0')
12799 return try_open_dwop_file (per_objfile
, file_name
,
12800 0 /*is_dwp*/, 1 /*search_cwd*/);
12803 /* This function is mapped across the sections and remembers the offset and
12804 size of each of the DWO debugging sections we are interested in. */
12807 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
,
12808 dwo_sections
*dwo_sections
)
12810 const struct dwop_section_names
*names
= &dwop_section_names
;
12812 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12814 dwo_sections
->abbrev
.s
.section
= sectp
;
12815 dwo_sections
->abbrev
.size
= bfd_section_size (sectp
);
12817 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12819 dwo_sections
->info
.s
.section
= sectp
;
12820 dwo_sections
->info
.size
= bfd_section_size (sectp
);
12822 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12824 dwo_sections
->line
.s
.section
= sectp
;
12825 dwo_sections
->line
.size
= bfd_section_size (sectp
);
12827 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12829 dwo_sections
->loc
.s
.section
= sectp
;
12830 dwo_sections
->loc
.size
= bfd_section_size (sectp
);
12832 else if (section_is_p (sectp
->name
, &names
->loclists_dwo
))
12834 dwo_sections
->loclists
.s
.section
= sectp
;
12835 dwo_sections
->loclists
.size
= bfd_section_size (sectp
);
12837 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12839 dwo_sections
->macinfo
.s
.section
= sectp
;
12840 dwo_sections
->macinfo
.size
= bfd_section_size (sectp
);
12842 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12844 dwo_sections
->macro
.s
.section
= sectp
;
12845 dwo_sections
->macro
.size
= bfd_section_size (sectp
);
12847 else if (section_is_p (sectp
->name
, &names
->rnglists_dwo
))
12849 dwo_sections
->rnglists
.s
.section
= sectp
;
12850 dwo_sections
->rnglists
.size
= bfd_section_size (sectp
);
12852 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12854 dwo_sections
->str
.s
.section
= sectp
;
12855 dwo_sections
->str
.size
= bfd_section_size (sectp
);
12857 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12859 dwo_sections
->str_offsets
.s
.section
= sectp
;
12860 dwo_sections
->str_offsets
.size
= bfd_section_size (sectp
);
12862 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12864 struct dwarf2_section_info type_section
;
12866 memset (&type_section
, 0, sizeof (type_section
));
12867 type_section
.s
.section
= sectp
;
12868 type_section
.size
= bfd_section_size (sectp
);
12869 dwo_sections
->types
.push_back (type_section
);
12873 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12874 by PER_CU. This is for the non-DWP case.
12875 The result is NULL if DWO_NAME can't be found. */
12877 static struct dwo_file
*
12878 open_and_init_dwo_file (dwarf2_cu
*cu
, const char *dwo_name
,
12879 const char *comp_dir
)
12881 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
12883 gdb_bfd_ref_ptr dbfd
= open_dwo_file (per_objfile
, dwo_name
, comp_dir
);
12886 dwarf_read_debug_printf ("DWO file not found: %s", dwo_name
);
12891 dwo_file_up
dwo_file (new struct dwo_file
);
12892 dwo_file
->dwo_name
= dwo_name
;
12893 dwo_file
->comp_dir
= comp_dir
;
12894 dwo_file
->dbfd
= std::move (dbfd
);
12896 for (asection
*sec
: gdb_bfd_sections (dwo_file
->dbfd
))
12897 dwarf2_locate_dwo_sections (dwo_file
->dbfd
.get (), sec
,
12898 &dwo_file
->sections
);
12900 create_cus_hash_table (per_objfile
, cu
, *dwo_file
, dwo_file
->sections
.info
,
12903 if (cu
->per_cu
->dwarf_version
< 5)
12905 create_debug_types_hash_table (per_objfile
, dwo_file
.get (),
12906 dwo_file
->sections
.types
, dwo_file
->tus
);
12910 create_debug_type_hash_table (per_objfile
, dwo_file
.get (),
12911 &dwo_file
->sections
.info
, dwo_file
->tus
,
12915 dwarf_read_debug_printf ("DWO file found: %s", dwo_name
);
12917 return dwo_file
.release ();
12920 /* This function is mapped across the sections and remembers the offset and
12921 size of each of the DWP debugging sections common to version 1 and 2 that
12922 we are interested in. */
12925 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12926 dwp_file
*dwp_file
)
12928 const struct dwop_section_names
*names
= &dwop_section_names
;
12929 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12931 /* Record the ELF section number for later lookup: this is what the
12932 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12933 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12934 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12936 /* Look for specific sections that we need. */
12937 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12939 dwp_file
->sections
.str
.s
.section
= sectp
;
12940 dwp_file
->sections
.str
.size
= bfd_section_size (sectp
);
12942 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12944 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12945 dwp_file
->sections
.cu_index
.size
= bfd_section_size (sectp
);
12947 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12949 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12950 dwp_file
->sections
.tu_index
.size
= bfd_section_size (sectp
);
12954 /* This function is mapped across the sections and remembers the offset and
12955 size of each of the DWP version 2 debugging sections that we are interested
12956 in. This is split into a separate function because we don't know if we
12957 have version 1 or 2 or 5 until we parse the cu_index/tu_index sections. */
12960 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12962 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12963 const struct dwop_section_names
*names
= &dwop_section_names
;
12964 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12966 /* Record the ELF section number for later lookup: this is what the
12967 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12968 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12969 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12971 /* Look for specific sections that we need. */
12972 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12974 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12975 dwp_file
->sections
.abbrev
.size
= bfd_section_size (sectp
);
12977 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12979 dwp_file
->sections
.info
.s
.section
= sectp
;
12980 dwp_file
->sections
.info
.size
= bfd_section_size (sectp
);
12982 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12984 dwp_file
->sections
.line
.s
.section
= sectp
;
12985 dwp_file
->sections
.line
.size
= bfd_section_size (sectp
);
12987 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12989 dwp_file
->sections
.loc
.s
.section
= sectp
;
12990 dwp_file
->sections
.loc
.size
= bfd_section_size (sectp
);
12992 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12994 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
12995 dwp_file
->sections
.macinfo
.size
= bfd_section_size (sectp
);
12997 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12999 dwp_file
->sections
.macro
.s
.section
= sectp
;
13000 dwp_file
->sections
.macro
.size
= bfd_section_size (sectp
);
13002 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
13004 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
13005 dwp_file
->sections
.str_offsets
.size
= bfd_section_size (sectp
);
13007 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
13009 dwp_file
->sections
.types
.s
.section
= sectp
;
13010 dwp_file
->sections
.types
.size
= bfd_section_size (sectp
);
13014 /* This function is mapped across the sections and remembers the offset and
13015 size of each of the DWP version 5 debugging sections that we are interested
13016 in. This is split into a separate function because we don't know if we
13017 have version 1 or 2 or 5 until we parse the cu_index/tu_index sections. */
13020 dwarf2_locate_v5_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
13022 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
13023 const struct dwop_section_names
*names
= &dwop_section_names
;
13024 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
13026 /* Record the ELF section number for later lookup: this is what the
13027 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
13028 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
13029 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
13031 /* Look for specific sections that we need. */
13032 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
13034 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
13035 dwp_file
->sections
.abbrev
.size
= bfd_section_size (sectp
);
13037 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
13039 dwp_file
->sections
.info
.s
.section
= sectp
;
13040 dwp_file
->sections
.info
.size
= bfd_section_size (sectp
);
13042 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
13044 dwp_file
->sections
.line
.s
.section
= sectp
;
13045 dwp_file
->sections
.line
.size
= bfd_section_size (sectp
);
13047 else if (section_is_p (sectp
->name
, &names
->loclists_dwo
))
13049 dwp_file
->sections
.loclists
.s
.section
= sectp
;
13050 dwp_file
->sections
.loclists
.size
= bfd_section_size (sectp
);
13052 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
13054 dwp_file
->sections
.macro
.s
.section
= sectp
;
13055 dwp_file
->sections
.macro
.size
= bfd_section_size (sectp
);
13057 else if (section_is_p (sectp
->name
, &names
->rnglists_dwo
))
13059 dwp_file
->sections
.rnglists
.s
.section
= sectp
;
13060 dwp_file
->sections
.rnglists
.size
= bfd_section_size (sectp
);
13062 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
13064 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
13065 dwp_file
->sections
.str_offsets
.size
= bfd_section_size (sectp
);
13069 /* Hash function for dwp_file loaded CUs/TUs. */
13072 hash_dwp_loaded_cutus (const void *item
)
13074 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
13076 /* This drops the top 32 bits of the signature, but is ok for a hash. */
13077 return dwo_unit
->signature
;
13080 /* Equality function for dwp_file loaded CUs/TUs. */
13083 eq_dwp_loaded_cutus (const void *a
, const void *b
)
13085 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
13086 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
13088 return dua
->signature
== dub
->signature
;
13091 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
13094 allocate_dwp_loaded_cutus_table ()
13096 return htab_up (htab_create_alloc (3,
13097 hash_dwp_loaded_cutus
,
13098 eq_dwp_loaded_cutus
,
13099 NULL
, xcalloc
, xfree
));
13102 /* Try to open DWP file FILE_NAME.
13103 The result is the bfd handle of the file.
13104 If there is a problem finding or opening the file, return NULL.
13105 Upon success, the canonicalized path of the file is stored in the bfd,
13106 same as symfile_bfd_open. */
13108 static gdb_bfd_ref_ptr
13109 open_dwp_file (dwarf2_per_objfile
*per_objfile
, const char *file_name
)
13111 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (per_objfile
, file_name
,
13113 1 /*search_cwd*/));
13117 /* Work around upstream bug 15652.
13118 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
13119 [Whether that's a "bug" is debatable, but it is getting in our way.]
13120 We have no real idea where the dwp file is, because gdb's realpath-ing
13121 of the executable's path may have discarded the needed info.
13122 [IWBN if the dwp file name was recorded in the executable, akin to
13123 .gnu_debuglink, but that doesn't exist yet.]
13124 Strip the directory from FILE_NAME and search again. */
13125 if (*debug_file_directory
!= '\0')
13127 /* Don't implicitly search the current directory here.
13128 If the user wants to search "." to handle this case,
13129 it must be added to debug-file-directory. */
13130 return try_open_dwop_file (per_objfile
, lbasename (file_name
),
13138 /* Initialize the use of the DWP file for the current objfile.
13139 By convention the name of the DWP file is ${objfile}.dwp.
13140 The result is NULL if it can't be found. */
13142 static std::unique_ptr
<struct dwp_file
>
13143 open_and_init_dwp_file (dwarf2_per_objfile
*per_objfile
)
13145 struct objfile
*objfile
= per_objfile
->objfile
;
13147 /* Try to find first .dwp for the binary file before any symbolic links
13150 /* If the objfile is a debug file, find the name of the real binary
13151 file and get the name of dwp file from there. */
13152 std::string dwp_name
;
13153 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
13155 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
13156 const char *backlink_basename
= lbasename (backlink
->original_name
);
13158 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
13161 dwp_name
= objfile
->original_name
;
13163 dwp_name
+= ".dwp";
13165 gdb_bfd_ref_ptr
dbfd (open_dwp_file (per_objfile
, dwp_name
.c_str ()));
13167 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
13169 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
13170 dwp_name
= objfile_name (objfile
);
13171 dwp_name
+= ".dwp";
13172 dbfd
= open_dwp_file (per_objfile
, dwp_name
.c_str ());
13177 dwarf_read_debug_printf ("DWP file not found: %s", dwp_name
.c_str ());
13179 return std::unique_ptr
<dwp_file
> ();
13182 const char *name
= bfd_get_filename (dbfd
.get ());
13183 std::unique_ptr
<struct dwp_file
> dwp_file
13184 (new struct dwp_file (name
, std::move (dbfd
)));
13186 dwp_file
->num_sections
= elf_numsections (dwp_file
->dbfd
);
13187 dwp_file
->elf_sections
=
13188 OBSTACK_CALLOC (&per_objfile
->per_bfd
->obstack
,
13189 dwp_file
->num_sections
, asection
*);
13191 for (asection
*sec
: gdb_bfd_sections (dwp_file
->dbfd
))
13192 dwarf2_locate_common_dwp_sections (dwp_file
->dbfd
.get (), sec
,
13195 dwp_file
->cus
= create_dwp_hash_table (per_objfile
, dwp_file
.get (), 0);
13197 dwp_file
->tus
= create_dwp_hash_table (per_objfile
, dwp_file
.get (), 1);
13199 /* The DWP file version is stored in the hash table. Oh well. */
13200 if (dwp_file
->cus
&& dwp_file
->tus
13201 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
13203 /* Technically speaking, we should try to limp along, but this is
13204 pretty bizarre. We use pulongest here because that's the established
13205 portability solution (e.g, we cannot use %u for uint32_t). */
13206 error (_("Dwarf Error: DWP file CU version %s doesn't match"
13207 " TU version %s [in DWP file %s]"),
13208 pulongest (dwp_file
->cus
->version
),
13209 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
13213 dwp_file
->version
= dwp_file
->cus
->version
;
13214 else if (dwp_file
->tus
)
13215 dwp_file
->version
= dwp_file
->tus
->version
;
13217 dwp_file
->version
= 2;
13219 for (asection
*sec
: gdb_bfd_sections (dwp_file
->dbfd
))
13221 if (dwp_file
->version
== 2)
13222 dwarf2_locate_v2_dwp_sections (dwp_file
->dbfd
.get (), sec
,
13225 dwarf2_locate_v5_dwp_sections (dwp_file
->dbfd
.get (), sec
,
13229 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table ();
13230 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table ();
13232 dwarf_read_debug_printf ("DWP file found: %s", dwp_file
->name
);
13233 dwarf_read_debug_printf (" %s CUs, %s TUs",
13234 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
13235 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
13240 /* Wrapper around open_and_init_dwp_file, only open it once. */
13242 static struct dwp_file
*
13243 get_dwp_file (dwarf2_per_objfile
*per_objfile
)
13245 if (!per_objfile
->per_bfd
->dwp_checked
)
13247 per_objfile
->per_bfd
->dwp_file
= open_and_init_dwp_file (per_objfile
);
13248 per_objfile
->per_bfd
->dwp_checked
= 1;
13250 return per_objfile
->per_bfd
->dwp_file
.get ();
13253 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
13254 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
13255 or in the DWP file for the objfile, referenced by THIS_UNIT.
13256 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
13257 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
13259 This is called, for example, when wanting to read a variable with a
13260 complex location. Therefore we don't want to do file i/o for every call.
13261 Therefore we don't want to look for a DWO file on every call.
13262 Therefore we first see if we've already seen SIGNATURE in a DWP file,
13263 then we check if we've already seen DWO_NAME, and only THEN do we check
13266 The result is a pointer to the dwo_unit object or NULL if we didn't find it
13267 (dwo_id mismatch or couldn't find the DWO/DWP file). */
13269 static struct dwo_unit
*
13270 lookup_dwo_cutu (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
,
13271 ULONGEST signature
, int is_debug_types
)
13273 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
13274 struct objfile
*objfile
= per_objfile
->objfile
;
13275 const char *kind
= is_debug_types
? "TU" : "CU";
13276 void **dwo_file_slot
;
13277 struct dwo_file
*dwo_file
;
13278 struct dwp_file
*dwp_file
;
13280 /* First see if there's a DWP file.
13281 If we have a DWP file but didn't find the DWO inside it, don't
13282 look for the original DWO file. It makes gdb behave differently
13283 depending on whether one is debugging in the build tree. */
13285 dwp_file
= get_dwp_file (per_objfile
);
13286 if (dwp_file
!= NULL
)
13288 const struct dwp_hash_table
*dwp_htab
=
13289 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
13291 if (dwp_htab
!= NULL
)
13293 struct dwo_unit
*dwo_cutu
=
13294 lookup_dwo_unit_in_dwp (per_objfile
, dwp_file
, comp_dir
, signature
,
13297 if (dwo_cutu
!= NULL
)
13299 dwarf_read_debug_printf ("Virtual DWO %s %s found: @%s",
13300 kind
, hex_string (signature
),
13301 host_address_to_string (dwo_cutu
));
13309 /* No DWP file, look for the DWO file. */
13311 dwo_file_slot
= lookup_dwo_file_slot (per_objfile
, dwo_name
, comp_dir
);
13312 if (*dwo_file_slot
== NULL
)
13314 /* Read in the file and build a table of the CUs/TUs it contains. */
13315 *dwo_file_slot
= open_and_init_dwo_file (cu
, dwo_name
, comp_dir
);
13317 /* NOTE: This will be NULL if unable to open the file. */
13318 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
13320 if (dwo_file
!= NULL
)
13322 struct dwo_unit
*dwo_cutu
= NULL
;
13324 if (is_debug_types
&& dwo_file
->tus
)
13326 struct dwo_unit find_dwo_cutu
;
13328 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13329 find_dwo_cutu
.signature
= signature
;
13331 = (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
13334 else if (!is_debug_types
&& dwo_file
->cus
)
13336 struct dwo_unit find_dwo_cutu
;
13338 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13339 find_dwo_cutu
.signature
= signature
;
13340 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
.get (),
13344 if (dwo_cutu
!= NULL
)
13346 dwarf_read_debug_printf ("DWO %s %s(%s) found: @%s",
13347 kind
, dwo_name
, hex_string (signature
),
13348 host_address_to_string (dwo_cutu
));
13355 /* We didn't find it. This could mean a dwo_id mismatch, or
13356 someone deleted the DWO/DWP file, or the search path isn't set up
13357 correctly to find the file. */
13359 dwarf_read_debug_printf ("DWO %s %s(%s) not found",
13360 kind
, dwo_name
, hex_string (signature
));
13362 /* This is a warning and not a complaint because it can be caused by
13363 pilot error (e.g., user accidentally deleting the DWO). */
13365 /* Print the name of the DWP file if we looked there, helps the user
13366 better diagnose the problem. */
13367 std::string dwp_text
;
13369 if (dwp_file
!= NULL
)
13370 dwp_text
= string_printf (" [in DWP file %s]",
13371 lbasename (dwp_file
->name
));
13373 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
13374 " [in module %s]"),
13375 kind
, dwo_name
, hex_string (signature
), dwp_text
.c_str (), kind
,
13376 sect_offset_str (cu
->per_cu
->sect_off
), objfile_name (objfile
));
13381 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
13382 See lookup_dwo_cutu_unit for details. */
13384 static struct dwo_unit
*
13385 lookup_dwo_comp_unit (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
,
13386 ULONGEST signature
)
13388 gdb_assert (!cu
->per_cu
->is_debug_types
);
13390 return lookup_dwo_cutu (cu
, dwo_name
, comp_dir
, signature
, 0);
13393 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
13394 See lookup_dwo_cutu_unit for details. */
13396 static struct dwo_unit
*
13397 lookup_dwo_type_unit (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
)
13399 gdb_assert (cu
->per_cu
->is_debug_types
);
13401 signatured_type
*sig_type
= (signatured_type
*) cu
->per_cu
;
13403 return lookup_dwo_cutu (cu
, dwo_name
, comp_dir
, sig_type
->signature
, 1);
13406 /* Traversal function for queue_and_load_all_dwo_tus. */
13409 queue_and_load_dwo_tu (void **slot
, void *info
)
13411 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
13412 dwarf2_cu
*cu
= (dwarf2_cu
*) info
;
13413 ULONGEST signature
= dwo_unit
->signature
;
13414 signatured_type
*sig_type
= lookup_dwo_signatured_type (cu
, signature
);
13416 if (sig_type
!= NULL
)
13418 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
13420 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
13421 a real dependency of PER_CU on SIG_TYPE. That is detected later
13422 while processing PER_CU. */
13423 if (maybe_queue_comp_unit (NULL
, sig_cu
, cu
->per_objfile
, cu
->language
))
13424 load_full_type_unit (sig_cu
, cu
->per_objfile
);
13425 cu
->per_cu
->imported_symtabs_push (sig_cu
);
13431 /* Queue all TUs contained in the DWO of CU to be read in.
13432 The DWO may have the only definition of the type, though it may not be
13433 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
13434 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
13437 queue_and_load_all_dwo_tus (dwarf2_cu
*cu
)
13439 struct dwo_unit
*dwo_unit
;
13440 struct dwo_file
*dwo_file
;
13442 gdb_assert (cu
!= nullptr);
13443 gdb_assert (!cu
->per_cu
->is_debug_types
);
13444 gdb_assert (get_dwp_file (cu
->per_objfile
) == nullptr);
13446 dwo_unit
= cu
->dwo_unit
;
13447 gdb_assert (dwo_unit
!= NULL
);
13449 dwo_file
= dwo_unit
->dwo_file
;
13450 if (dwo_file
->tus
!= NULL
)
13451 htab_traverse_noresize (dwo_file
->tus
.get (), queue_and_load_dwo_tu
, cu
);
13454 /* Read in various DIEs. */
13456 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
13457 Inherit only the children of the DW_AT_abstract_origin DIE not being
13458 already referenced by DW_AT_abstract_origin from the children of the
13462 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
13464 struct die_info
*child_die
;
13465 sect_offset
*offsetp
;
13466 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
13467 struct die_info
*origin_die
;
13468 /* Iterator of the ORIGIN_DIE children. */
13469 struct die_info
*origin_child_die
;
13470 struct attribute
*attr
;
13471 struct dwarf2_cu
*origin_cu
;
13472 struct pending
**origin_previous_list_in_scope
;
13474 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13478 /* Note that following die references may follow to a die in a
13482 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
13484 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
13486 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
13487 origin_cu
->list_in_scope
= cu
->list_in_scope
;
13489 if (die
->tag
!= origin_die
->tag
13490 && !(die
->tag
== DW_TAG_inlined_subroutine
13491 && origin_die
->tag
== DW_TAG_subprogram
))
13492 complaint (_("DIE %s and its abstract origin %s have different tags"),
13493 sect_offset_str (die
->sect_off
),
13494 sect_offset_str (origin_die
->sect_off
));
13496 std::vector
<sect_offset
> offsets
;
13498 for (child_die
= die
->child
;
13499 child_die
&& child_die
->tag
;
13500 child_die
= child_die
->sibling
)
13502 struct die_info
*child_origin_die
;
13503 struct dwarf2_cu
*child_origin_cu
;
13505 /* We are trying to process concrete instance entries:
13506 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
13507 it's not relevant to our analysis here. i.e. detecting DIEs that are
13508 present in the abstract instance but not referenced in the concrete
13510 if (child_die
->tag
== DW_TAG_call_site
13511 || child_die
->tag
== DW_TAG_GNU_call_site
)
13514 /* For each CHILD_DIE, find the corresponding child of
13515 ORIGIN_DIE. If there is more than one layer of
13516 DW_AT_abstract_origin, follow them all; there shouldn't be,
13517 but GCC versions at least through 4.4 generate this (GCC PR
13519 child_origin_die
= child_die
;
13520 child_origin_cu
= cu
;
13523 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
13527 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
13531 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
13532 counterpart may exist. */
13533 if (child_origin_die
!= child_die
)
13535 if (child_die
->tag
!= child_origin_die
->tag
13536 && !(child_die
->tag
== DW_TAG_inlined_subroutine
13537 && child_origin_die
->tag
== DW_TAG_subprogram
))
13538 complaint (_("Child DIE %s and its abstract origin %s have "
13540 sect_offset_str (child_die
->sect_off
),
13541 sect_offset_str (child_origin_die
->sect_off
));
13542 if (child_origin_die
->parent
!= origin_die
)
13543 complaint (_("Child DIE %s and its abstract origin %s have "
13544 "different parents"),
13545 sect_offset_str (child_die
->sect_off
),
13546 sect_offset_str (child_origin_die
->sect_off
));
13548 offsets
.push_back (child_origin_die
->sect_off
);
13551 std::sort (offsets
.begin (), offsets
.end ());
13552 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
13553 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
13554 if (offsetp
[-1] == *offsetp
)
13555 complaint (_("Multiple children of DIE %s refer "
13556 "to DIE %s as their abstract origin"),
13557 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
13559 offsetp
= offsets
.data ();
13560 origin_child_die
= origin_die
->child
;
13561 while (origin_child_die
&& origin_child_die
->tag
)
13563 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13564 while (offsetp
< offsets_end
13565 && *offsetp
< origin_child_die
->sect_off
)
13567 if (offsetp
>= offsets_end
13568 || *offsetp
> origin_child_die
->sect_off
)
13570 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13571 Check whether we're already processing ORIGIN_CHILD_DIE.
13572 This can happen with mutually referenced abstract_origins.
13574 if (!origin_child_die
->in_process
)
13575 process_die (origin_child_die
, origin_cu
);
13577 origin_child_die
= origin_child_die
->sibling
;
13579 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13581 if (cu
!= origin_cu
)
13582 compute_delayed_physnames (origin_cu
);
13586 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13588 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
13589 struct gdbarch
*gdbarch
= objfile
->arch ();
13590 struct context_stack
*newobj
;
13593 struct die_info
*child_die
;
13594 struct attribute
*attr
, *call_line
, *call_file
;
13596 CORE_ADDR baseaddr
;
13597 struct block
*block
;
13598 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13599 std::vector
<struct symbol
*> template_args
;
13600 struct template_symbol
*templ_func
= NULL
;
13604 /* If we do not have call site information, we can't show the
13605 caller of this inlined function. That's too confusing, so
13606 only use the scope for local variables. */
13607 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13608 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13609 if (call_line
== NULL
|| call_file
== NULL
)
13611 read_lexical_block_scope (die
, cu
);
13616 baseaddr
= objfile
->text_section_offset ();
13618 name
= dwarf2_name (die
, cu
);
13620 /* Ignore functions with missing or empty names. These are actually
13621 illegal according to the DWARF standard. */
13624 complaint (_("missing name for subprogram DIE at %s"),
13625 sect_offset_str (die
->sect_off
));
13629 /* Ignore functions with missing or invalid low and high pc attributes. */
13630 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13631 <= PC_BOUNDS_INVALID
)
13633 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13634 if (attr
== nullptr || !attr
->as_boolean ())
13635 complaint (_("cannot get low and high bounds "
13636 "for subprogram DIE at %s"),
13637 sect_offset_str (die
->sect_off
));
13641 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13642 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13644 /* If we have any template arguments, then we must allocate a
13645 different sort of symbol. */
13646 for (child_die
= die
->child
; child_die
; child_die
= child_die
->sibling
)
13648 if (child_die
->tag
== DW_TAG_template_type_param
13649 || child_die
->tag
== DW_TAG_template_value_param
)
13651 templ_func
= new (&objfile
->objfile_obstack
) template_symbol
;
13652 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13657 newobj
= cu
->get_builder ()->push_context (0, lowpc
);
13658 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13659 (struct symbol
*) templ_func
);
13661 if (dwarf2_flag_true_p (die
, DW_AT_main_subprogram
, cu
))
13662 set_objfile_main_name (objfile
, newobj
->name
->linkage_name (),
13665 /* If there is a location expression for DW_AT_frame_base, record
13667 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13668 if (attr
!= nullptr)
13669 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13671 /* If there is a location for the static link, record it. */
13672 newobj
->static_link
= NULL
;
13673 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13674 if (attr
!= nullptr)
13676 newobj
->static_link
13677 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13678 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
,
13682 cu
->list_in_scope
= cu
->get_builder ()->get_local_symbols ();
13684 if (die
->child
!= NULL
)
13686 child_die
= die
->child
;
13687 while (child_die
&& child_die
->tag
)
13689 if (child_die
->tag
== DW_TAG_template_type_param
13690 || child_die
->tag
== DW_TAG_template_value_param
)
13692 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13695 template_args
.push_back (arg
);
13698 process_die (child_die
, cu
);
13699 child_die
= child_die
->sibling
;
13703 inherit_abstract_dies (die
, cu
);
13705 /* If we have a DW_AT_specification, we might need to import using
13706 directives from the context of the specification DIE. See the
13707 comment in determine_prefix. */
13708 if (cu
->language
== language_cplus
13709 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13711 struct dwarf2_cu
*spec_cu
= cu
;
13712 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13716 child_die
= spec_die
->child
;
13717 while (child_die
&& child_die
->tag
)
13719 if (child_die
->tag
== DW_TAG_imported_module
)
13720 process_die (child_die
, spec_cu
);
13721 child_die
= child_die
->sibling
;
13724 /* In some cases, GCC generates specification DIEs that
13725 themselves contain DW_AT_specification attributes. */
13726 spec_die
= die_specification (spec_die
, &spec_cu
);
13730 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13731 /* Make a block for the local symbols within. */
13732 block
= cu
->get_builder ()->finish_block (cstk
.name
, cstk
.old_blocks
,
13733 cstk
.static_link
, lowpc
, highpc
);
13735 /* For C++, set the block's scope. */
13736 if ((cu
->language
== language_cplus
13737 || cu
->language
== language_fortran
13738 || cu
->language
== language_d
13739 || cu
->language
== language_rust
)
13740 && cu
->processing_has_namespace_info
)
13741 block_set_scope (block
, determine_prefix (die
, cu
),
13742 &objfile
->objfile_obstack
);
13744 /* If we have address ranges, record them. */
13745 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13747 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
13749 /* Attach template arguments to function. */
13750 if (!template_args
.empty ())
13752 gdb_assert (templ_func
!= NULL
);
13754 templ_func
->n_template_arguments
= template_args
.size ();
13755 templ_func
->template_arguments
13756 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13757 templ_func
->n_template_arguments
);
13758 memcpy (templ_func
->template_arguments
,
13759 template_args
.data (),
13760 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13762 /* Make sure that the symtab is set on the new symbols. Even
13763 though they don't appear in this symtab directly, other parts
13764 of gdb assume that symbols do, and this is reasonably
13766 for (symbol
*sym
: template_args
)
13767 symbol_set_symtab (sym
, symbol_symtab (templ_func
));
13770 /* In C++, we can have functions nested inside functions (e.g., when
13771 a function declares a class that has methods). This means that
13772 when we finish processing a function scope, we may need to go
13773 back to building a containing block's symbol lists. */
13774 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13775 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13777 /* If we've finished processing a top-level function, subsequent
13778 symbols go in the file symbol list. */
13779 if (cu
->get_builder ()->outermost_context_p ())
13780 cu
->list_in_scope
= cu
->get_builder ()->get_file_symbols ();
13783 /* Process all the DIES contained within a lexical block scope. Start
13784 a new scope, process the dies, and then close the scope. */
13787 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13789 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
13790 struct gdbarch
*gdbarch
= objfile
->arch ();
13791 CORE_ADDR lowpc
, highpc
;
13792 struct die_info
*child_die
;
13793 CORE_ADDR baseaddr
;
13795 baseaddr
= objfile
->text_section_offset ();
13797 /* Ignore blocks with missing or invalid low and high pc attributes. */
13798 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13799 as multiple lexical blocks? Handling children in a sane way would
13800 be nasty. Might be easier to properly extend generic blocks to
13801 describe ranges. */
13802 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13804 case PC_BOUNDS_NOT_PRESENT
:
13805 /* DW_TAG_lexical_block has no attributes, process its children as if
13806 there was no wrapping by that DW_TAG_lexical_block.
13807 GCC does no longer produces such DWARF since GCC r224161. */
13808 for (child_die
= die
->child
;
13809 child_die
!= NULL
&& child_die
->tag
;
13810 child_die
= child_die
->sibling
)
13812 /* We might already be processing this DIE. This can happen
13813 in an unusual circumstance -- where a subroutine A
13814 appears lexically in another subroutine B, but A actually
13815 inlines B. The recursion is broken here, rather than in
13816 inherit_abstract_dies, because it seems better to simply
13817 drop concrete children here. */
13818 if (!child_die
->in_process
)
13819 process_die (child_die
, cu
);
13822 case PC_BOUNDS_INVALID
:
13825 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13826 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13828 cu
->get_builder ()->push_context (0, lowpc
);
13829 if (die
->child
!= NULL
)
13831 child_die
= die
->child
;
13832 while (child_die
&& child_die
->tag
)
13834 process_die (child_die
, cu
);
13835 child_die
= child_die
->sibling
;
13838 inherit_abstract_dies (die
, cu
);
13839 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13841 if (*cu
->get_builder ()->get_local_symbols () != NULL
13842 || (*cu
->get_builder ()->get_local_using_directives ()) != NULL
)
13844 struct block
*block
13845 = cu
->get_builder ()->finish_block (0, cstk
.old_blocks
, NULL
,
13846 cstk
.start_addr
, highpc
);
13848 /* Note that recording ranges after traversing children, as we
13849 do here, means that recording a parent's ranges entails
13850 walking across all its children's ranges as they appear in
13851 the address map, which is quadratic behavior.
13853 It would be nicer to record the parent's ranges before
13854 traversing its children, simply overriding whatever you find
13855 there. But since we don't even decide whether to create a
13856 block until after we've traversed its children, that's hard
13858 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13860 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13861 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13864 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13867 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13869 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
13870 struct objfile
*objfile
= per_objfile
->objfile
;
13871 struct gdbarch
*gdbarch
= objfile
->arch ();
13872 CORE_ADDR pc
, baseaddr
;
13873 struct attribute
*attr
;
13874 struct call_site
*call_site
, call_site_local
;
13877 struct die_info
*child_die
;
13879 baseaddr
= objfile
->text_section_offset ();
13881 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13884 /* This was a pre-DWARF-5 GNU extension alias
13885 for DW_AT_call_return_pc. */
13886 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13890 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13891 "DIE %s [in module %s]"),
13892 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13895 pc
= attr
->as_address () + baseaddr
;
13896 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13898 if (cu
->call_site_htab
== NULL
)
13899 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13900 NULL
, &objfile
->objfile_obstack
,
13901 hashtab_obstack_allocate
, NULL
);
13902 call_site_local
.pc
= pc
;
13903 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13906 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13907 "DIE %s [in module %s]"),
13908 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13909 objfile_name (objfile
));
13913 /* Count parameters at the caller. */
13916 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13917 child_die
= child_die
->sibling
)
13919 if (child_die
->tag
!= DW_TAG_call_site_parameter
13920 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13922 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
13923 "DW_TAG_call_site child DIE %s [in module %s]"),
13924 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13925 objfile_name (objfile
));
13933 = ((struct call_site
*)
13934 obstack_alloc (&objfile
->objfile_obstack
,
13935 sizeof (*call_site
)
13936 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13938 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13939 call_site
->pc
= pc
;
13941 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13942 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13944 struct die_info
*func_die
;
13946 /* Skip also over DW_TAG_inlined_subroutine. */
13947 for (func_die
= die
->parent
;
13948 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13949 && func_die
->tag
!= DW_TAG_subroutine_type
;
13950 func_die
= func_die
->parent
);
13952 /* DW_AT_call_all_calls is a superset
13953 of DW_AT_call_all_tail_calls. */
13955 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13956 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13957 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13958 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13960 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13961 not complete. But keep CALL_SITE for look ups via call_site_htab,
13962 both the initial caller containing the real return address PC and
13963 the final callee containing the current PC of a chain of tail
13964 calls do not need to have the tail call list complete. But any
13965 function candidate for a virtual tail call frame searched via
13966 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13967 determined unambiguously. */
13971 struct type
*func_type
= NULL
;
13974 func_type
= get_die_type (func_die
, cu
);
13975 if (func_type
!= NULL
)
13977 gdb_assert (func_type
->code () == TYPE_CODE_FUNC
);
13979 /* Enlist this call site to the function. */
13980 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13981 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13984 complaint (_("Cannot find function owning DW_TAG_call_site "
13985 "DIE %s [in module %s]"),
13986 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13990 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13992 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13994 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13997 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13998 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
14000 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
14001 if (!attr
|| (attr
->form_is_block () && attr
->as_block ()->size
== 0))
14002 /* Keep NULL DWARF_BLOCK. */;
14003 else if (attr
->form_is_block ())
14005 struct dwarf2_locexpr_baton
*dlbaton
;
14006 struct dwarf_block
*block
= attr
->as_block ();
14008 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
14009 dlbaton
->data
= block
->data
;
14010 dlbaton
->size
= block
->size
;
14011 dlbaton
->per_objfile
= per_objfile
;
14012 dlbaton
->per_cu
= cu
->per_cu
;
14014 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
14016 else if (attr
->form_is_ref ())
14018 struct dwarf2_cu
*target_cu
= cu
;
14019 struct die_info
*target_die
;
14021 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14022 gdb_assert (target_cu
->per_objfile
->objfile
== objfile
);
14023 if (die_is_declaration (target_die
, target_cu
))
14025 const char *target_physname
;
14027 /* Prefer the mangled name; otherwise compute the demangled one. */
14028 target_physname
= dw2_linkage_name (target_die
, target_cu
);
14029 if (target_physname
== NULL
)
14030 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
14031 if (target_physname
== NULL
)
14032 complaint (_("DW_AT_call_target target DIE has invalid "
14033 "physname, for referencing DIE %s [in module %s]"),
14034 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14036 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
14042 /* DW_AT_entry_pc should be preferred. */
14043 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
14044 <= PC_BOUNDS_INVALID
)
14045 complaint (_("DW_AT_call_target target DIE has invalid "
14046 "low pc, for referencing DIE %s [in module %s]"),
14047 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14050 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
14051 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
14056 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
14057 "block nor reference, for DIE %s [in module %s]"),
14058 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14060 call_site
->per_cu
= cu
->per_cu
;
14061 call_site
->per_objfile
= per_objfile
;
14063 for (child_die
= die
->child
;
14064 child_die
&& child_die
->tag
;
14065 child_die
= child_die
->sibling
)
14067 struct call_site_parameter
*parameter
;
14068 struct attribute
*loc
, *origin
;
14070 if (child_die
->tag
!= DW_TAG_call_site_parameter
14071 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14073 /* Already printed the complaint above. */
14077 gdb_assert (call_site
->parameter_count
< nparams
);
14078 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
14080 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
14081 specifies DW_TAG_formal_parameter. Value of the data assumed for the
14082 register is contained in DW_AT_call_value. */
14084 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
14085 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
14086 if (origin
== NULL
)
14088 /* This was a pre-DWARF-5 GNU extension alias
14089 for DW_AT_call_parameter. */
14090 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
14092 if (loc
== NULL
&& origin
!= NULL
&& origin
->form_is_ref ())
14094 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
14096 sect_offset sect_off
= origin
->get_ref_die_offset ();
14097 if (!cu
->header
.offset_in_cu_p (sect_off
))
14099 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
14100 binding can be done only inside one CU. Such referenced DIE
14101 therefore cannot be even moved to DW_TAG_partial_unit. */
14102 complaint (_("DW_AT_call_parameter offset is not in CU for "
14103 "DW_TAG_call_site child DIE %s [in module %s]"),
14104 sect_offset_str (child_die
->sect_off
),
14105 objfile_name (objfile
));
14108 parameter
->u
.param_cu_off
14109 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
14111 else if (loc
== NULL
|| origin
!= NULL
|| !loc
->form_is_block ())
14113 complaint (_("No DW_FORM_block* DW_AT_location for "
14114 "DW_TAG_call_site child DIE %s [in module %s]"),
14115 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
14120 struct dwarf_block
*block
= loc
->as_block ();
14122 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
14123 (block
->data
, &block
->data
[block
->size
]);
14124 if (parameter
->u
.dwarf_reg
!= -1)
14125 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
14126 else if (dwarf_block_to_sp_offset (gdbarch
, block
->data
,
14127 &block
->data
[block
->size
],
14128 ¶meter
->u
.fb_offset
))
14129 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
14132 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
14133 "for DW_FORM_block* DW_AT_location is supported for "
14134 "DW_TAG_call_site child DIE %s "
14136 sect_offset_str (child_die
->sect_off
),
14137 objfile_name (objfile
));
14142 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
14144 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
14145 if (attr
== NULL
|| !attr
->form_is_block ())
14147 complaint (_("No DW_FORM_block* DW_AT_call_value for "
14148 "DW_TAG_call_site child DIE %s [in module %s]"),
14149 sect_offset_str (child_die
->sect_off
),
14150 objfile_name (objfile
));
14154 struct dwarf_block
*block
= attr
->as_block ();
14155 parameter
->value
= block
->data
;
14156 parameter
->value_size
= block
->size
;
14158 /* Parameters are not pre-cleared by memset above. */
14159 parameter
->data_value
= NULL
;
14160 parameter
->data_value_size
= 0;
14161 call_site
->parameter_count
++;
14163 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
14165 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
14166 if (attr
!= nullptr)
14168 if (!attr
->form_is_block ())
14169 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
14170 "DW_TAG_call_site child DIE %s [in module %s]"),
14171 sect_offset_str (child_die
->sect_off
),
14172 objfile_name (objfile
));
14175 block
= attr
->as_block ();
14176 parameter
->data_value
= block
->data
;
14177 parameter
->data_value_size
= block
->size
;
14183 /* Helper function for read_variable. If DIE represents a virtual
14184 table, then return the type of the concrete object that is
14185 associated with the virtual table. Otherwise, return NULL. */
14187 static struct type
*
14188 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14190 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14194 /* Find the type DIE. */
14195 struct die_info
*type_die
= NULL
;
14196 struct dwarf2_cu
*type_cu
= cu
;
14198 if (attr
->form_is_ref ())
14199 type_die
= follow_die_ref (die
, attr
, &type_cu
);
14200 if (type_die
== NULL
)
14203 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
14205 return die_containing_type (type_die
, type_cu
);
14208 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
14211 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
14213 struct rust_vtable_symbol
*storage
= NULL
;
14215 if (cu
->language
== language_rust
)
14217 struct type
*containing_type
= rust_containing_type (die
, cu
);
14219 if (containing_type
!= NULL
)
14221 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
14223 storage
= new (&objfile
->objfile_obstack
) rust_vtable_symbol
;
14224 storage
->concrete_type
= containing_type
;
14225 storage
->subclass
= SYMBOL_RUST_VTABLE
;
14229 struct symbol
*res
= new_symbol (die
, NULL
, cu
, storage
);
14230 struct attribute
*abstract_origin
14231 = dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
14232 struct attribute
*loc
= dwarf2_attr (die
, DW_AT_location
, cu
);
14233 if (res
== NULL
&& loc
&& abstract_origin
)
14235 /* We have a variable without a name, but with a location and an abstract
14236 origin. This may be a concrete instance of an abstract variable
14237 referenced from an DW_OP_GNU_variable_value, so save it to find it back
14239 struct dwarf2_cu
*origin_cu
= cu
;
14240 struct die_info
*origin_die
14241 = follow_die_ref (die
, abstract_origin
, &origin_cu
);
14242 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
14243 per_objfile
->per_bfd
->abstract_to_concrete
14244 [origin_die
->sect_off
].push_back (die
->sect_off
);
14248 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
14249 reading .debug_rnglists.
14250 Callback's type should be:
14251 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14252 Return true if the attributes are present and valid, otherwise,
14255 template <typename Callback
>
14257 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
14258 dwarf_tag tag
, Callback
&&callback
)
14260 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
14261 struct objfile
*objfile
= per_objfile
->objfile
;
14262 bfd
*obfd
= objfile
->obfd
;
14263 /* Base address selection entry. */
14264 gdb::optional
<CORE_ADDR
> base
;
14265 const gdb_byte
*buffer
;
14266 CORE_ADDR baseaddr
;
14267 bool overflow
= false;
14268 ULONGEST addr_index
;
14269 struct dwarf2_section_info
*rnglists_section
;
14271 base
= cu
->base_address
;
14272 rnglists_section
= cu_debug_rnglists_section (cu
, tag
);
14273 rnglists_section
->read (objfile
);
14275 if (offset
>= rnglists_section
->size
)
14277 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14281 buffer
= rnglists_section
->buffer
+ offset
;
14283 baseaddr
= objfile
->text_section_offset ();
14287 /* Initialize it due to a false compiler warning. */
14288 CORE_ADDR range_beginning
= 0, range_end
= 0;
14289 const gdb_byte
*buf_end
= (rnglists_section
->buffer
14290 + rnglists_section
->size
);
14291 unsigned int bytes_read
;
14293 if (buffer
== buf_end
)
14298 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
14301 case DW_RLE_end_of_list
:
14303 case DW_RLE_base_address
:
14304 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14309 base
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
14310 buffer
+= bytes_read
;
14312 case DW_RLE_base_addressx
:
14313 addr_index
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14314 buffer
+= bytes_read
;
14315 base
= read_addr_index (cu
, addr_index
);
14317 case DW_RLE_start_length
:
14318 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14323 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
14325 buffer
+= bytes_read
;
14326 range_end
= (range_beginning
14327 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
14328 buffer
+= bytes_read
;
14329 if (buffer
> buf_end
)
14335 case DW_RLE_startx_length
:
14336 addr_index
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14337 buffer
+= bytes_read
;
14338 range_beginning
= read_addr_index (cu
, addr_index
);
14339 if (buffer
> buf_end
)
14344 range_end
= (range_beginning
14345 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
14346 buffer
+= bytes_read
;
14348 case DW_RLE_offset_pair
:
14349 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14350 buffer
+= bytes_read
;
14351 if (buffer
> buf_end
)
14356 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14357 buffer
+= bytes_read
;
14358 if (buffer
> buf_end
)
14364 case DW_RLE_start_end
:
14365 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
14370 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
14372 buffer
+= bytes_read
;
14373 range_end
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
14374 buffer
+= bytes_read
;
14376 case DW_RLE_startx_endx
:
14377 addr_index
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14378 buffer
+= bytes_read
;
14379 range_beginning
= read_addr_index (cu
, addr_index
);
14380 if (buffer
> buf_end
)
14385 addr_index
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14386 buffer
+= bytes_read
;
14387 range_end
= read_addr_index (cu
, addr_index
);
14390 complaint (_("Invalid .debug_rnglists data (no base address)"));
14393 if (rlet
== DW_RLE_end_of_list
|| overflow
)
14395 if (rlet
== DW_RLE_base_address
)
14398 if (range_beginning
> range_end
)
14400 /* Inverted range entries are invalid. */
14401 complaint (_("Invalid .debug_rnglists data (inverted range)"));
14405 /* Empty range entries have no effect. */
14406 if (range_beginning
== range_end
)
14409 /* Only DW_RLE_offset_pair needs the base address added. */
14410 if (rlet
== DW_RLE_offset_pair
)
14412 if (!base
.has_value ())
14414 /* We have no valid base address for the DW_RLE_offset_pair. */
14415 complaint (_("Invalid .debug_rnglists data (no base address for "
14416 "DW_RLE_offset_pair)"));
14420 range_beginning
+= *base
;
14421 range_end
+= *base
;
14424 /* A not-uncommon case of bad debug info.
14425 Don't pollute the addrmap with bad data. */
14426 if (range_beginning
+ baseaddr
== 0
14427 && !per_objfile
->per_bfd
->has_section_at_zero
)
14429 complaint (_(".debug_rnglists entry has start address of zero"
14430 " [in module %s]"), objfile_name (objfile
));
14434 callback (range_beginning
, range_end
);
14439 complaint (_("Offset %d is not terminated "
14440 "for DW_AT_ranges attribute"),
14448 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
14449 Callback's type should be:
14450 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14451 Return 1 if the attributes are present and valid, otherwise, return 0. */
14453 template <typename Callback
>
14455 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
, dwarf_tag tag
,
14456 Callback
&&callback
)
14458 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
14459 struct objfile
*objfile
= per_objfile
->objfile
;
14460 struct comp_unit_head
*cu_header
= &cu
->header
;
14461 bfd
*obfd
= objfile
->obfd
;
14462 unsigned int addr_size
= cu_header
->addr_size
;
14463 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14464 /* Base address selection entry. */
14465 gdb::optional
<CORE_ADDR
> base
;
14466 unsigned int dummy
;
14467 const gdb_byte
*buffer
;
14468 CORE_ADDR baseaddr
;
14470 if (cu_header
->version
>= 5)
14471 return dwarf2_rnglists_process (offset
, cu
, tag
, callback
);
14473 base
= cu
->base_address
;
14475 per_objfile
->per_bfd
->ranges
.read (objfile
);
14476 if (offset
>= per_objfile
->per_bfd
->ranges
.size
)
14478 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14482 buffer
= per_objfile
->per_bfd
->ranges
.buffer
+ offset
;
14484 baseaddr
= objfile
->text_section_offset ();
14488 CORE_ADDR range_beginning
, range_end
;
14490 range_beginning
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
14491 buffer
+= addr_size
;
14492 range_end
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
14493 buffer
+= addr_size
;
14494 offset
+= 2 * addr_size
;
14496 /* An end of list marker is a pair of zero addresses. */
14497 if (range_beginning
== 0 && range_end
== 0)
14498 /* Found the end of list entry. */
14501 /* Each base address selection entry is a pair of 2 values.
14502 The first is the largest possible address, the second is
14503 the base address. Check for a base address here. */
14504 if ((range_beginning
& mask
) == mask
)
14506 /* If we found the largest possible address, then we already
14507 have the base address in range_end. */
14512 if (!base
.has_value ())
14514 /* We have no valid base address for the ranges
14516 complaint (_("Invalid .debug_ranges data (no base address)"));
14520 if (range_beginning
> range_end
)
14522 /* Inverted range entries are invalid. */
14523 complaint (_("Invalid .debug_ranges data (inverted range)"));
14527 /* Empty range entries have no effect. */
14528 if (range_beginning
== range_end
)
14531 range_beginning
+= *base
;
14532 range_end
+= *base
;
14534 /* A not-uncommon case of bad debug info.
14535 Don't pollute the addrmap with bad data. */
14536 if (range_beginning
+ baseaddr
== 0
14537 && !per_objfile
->per_bfd
->has_section_at_zero
)
14539 complaint (_(".debug_ranges entry has start address of zero"
14540 " [in module %s]"), objfile_name (objfile
));
14544 callback (range_beginning
, range_end
);
14550 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
14551 Return 1 if the attributes are present and valid, otherwise, return 0.
14552 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
14555 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
14556 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
14557 dwarf2_psymtab
*ranges_pst
, dwarf_tag tag
)
14559 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
14560 struct gdbarch
*gdbarch
= objfile
->arch ();
14561 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
14564 CORE_ADDR high
= 0;
14567 retval
= dwarf2_ranges_process (offset
, cu
, tag
,
14568 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
14570 if (ranges_pst
!= NULL
)
14575 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14576 range_beginning
+ baseaddr
)
14578 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14579 range_end
+ baseaddr
)
14581 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
14582 lowpc
, highpc
- 1, ranges_pst
);
14585 /* FIXME: This is recording everything as a low-high
14586 segment of consecutive addresses. We should have a
14587 data structure for discontiguous block ranges
14591 low
= range_beginning
;
14597 if (range_beginning
< low
)
14598 low
= range_beginning
;
14599 if (range_end
> high
)
14607 /* If the first entry is an end-of-list marker, the range
14608 describes an empty scope, i.e. no instructions. */
14614 *high_return
= high
;
14618 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14619 definition for the return value. *LOWPC and *HIGHPC are set iff
14620 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14622 static enum pc_bounds_kind
14623 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14624 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14625 dwarf2_psymtab
*pst
)
14627 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
14628 struct attribute
*attr
;
14629 struct attribute
*attr_high
;
14631 CORE_ADDR high
= 0;
14632 enum pc_bounds_kind ret
;
14634 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14637 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14638 if (attr
!= nullptr)
14640 low
= attr
->as_address ();
14641 high
= attr_high
->as_address ();
14642 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
14646 /* Found high w/o low attribute. */
14647 return PC_BOUNDS_INVALID
;
14649 /* Found consecutive range of addresses. */
14650 ret
= PC_BOUNDS_HIGH_LOW
;
14654 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14655 if (attr
!= nullptr && attr
->form_is_unsigned ())
14657 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
14658 We take advantage of the fact that DW_AT_ranges does not appear
14659 in DW_TAG_compile_unit of DWO files.
14661 Attributes of the form DW_FORM_rnglistx have already had their
14662 value changed by read_rnglist_index and already include
14663 DW_AT_rnglists_base, so don't need to add the ranges base,
14665 int need_ranges_base
= (die
->tag
!= DW_TAG_compile_unit
14666 && attr
->form
!= DW_FORM_rnglistx
);
14667 unsigned int ranges_offset
= (attr
->as_unsigned ()
14668 + (need_ranges_base
14672 /* Value of the DW_AT_ranges attribute is the offset in the
14673 .debug_ranges section. */
14674 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
,
14676 return PC_BOUNDS_INVALID
;
14677 /* Found discontinuous range of addresses. */
14678 ret
= PC_BOUNDS_RANGES
;
14681 return PC_BOUNDS_NOT_PRESENT
;
14684 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14686 return PC_BOUNDS_INVALID
;
14688 /* When using the GNU linker, .gnu.linkonce. sections are used to
14689 eliminate duplicate copies of functions and vtables and such.
14690 The linker will arbitrarily choose one and discard the others.
14691 The AT_*_pc values for such functions refer to local labels in
14692 these sections. If the section from that file was discarded, the
14693 labels are not in the output, so the relocs get a value of 0.
14694 If this is a discarded function, mark the pc bounds as invalid,
14695 so that GDB will ignore it. */
14696 if (low
== 0 && !per_objfile
->per_bfd
->has_section_at_zero
)
14697 return PC_BOUNDS_INVALID
;
14705 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14706 its low and high PC addresses. Do nothing if these addresses could not
14707 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14708 and HIGHPC to the high address if greater than HIGHPC. */
14711 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14712 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14713 struct dwarf2_cu
*cu
)
14715 CORE_ADDR low
, high
;
14716 struct die_info
*child
= die
->child
;
14718 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14720 *lowpc
= std::min (*lowpc
, low
);
14721 *highpc
= std::max (*highpc
, high
);
14724 /* If the language does not allow nested subprograms (either inside
14725 subprograms or lexical blocks), we're done. */
14726 if (cu
->language
!= language_ada
)
14729 /* Check all the children of the given DIE. If it contains nested
14730 subprograms, then check their pc bounds. Likewise, we need to
14731 check lexical blocks as well, as they may also contain subprogram
14733 while (child
&& child
->tag
)
14735 if (child
->tag
== DW_TAG_subprogram
14736 || child
->tag
== DW_TAG_lexical_block
)
14737 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14738 child
= child
->sibling
;
14742 /* Get the low and high pc's represented by the scope DIE, and store
14743 them in *LOWPC and *HIGHPC. If the correct values can't be
14744 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14747 get_scope_pc_bounds (struct die_info
*die
,
14748 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14749 struct dwarf2_cu
*cu
)
14751 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14752 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14753 CORE_ADDR current_low
, current_high
;
14755 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14756 >= PC_BOUNDS_RANGES
)
14758 best_low
= current_low
;
14759 best_high
= current_high
;
14763 struct die_info
*child
= die
->child
;
14765 while (child
&& child
->tag
)
14767 switch (child
->tag
) {
14768 case DW_TAG_subprogram
:
14769 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14771 case DW_TAG_namespace
:
14772 case DW_TAG_module
:
14773 /* FIXME: carlton/2004-01-16: Should we do this for
14774 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14775 that current GCC's always emit the DIEs corresponding
14776 to definitions of methods of classes as children of a
14777 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14778 the DIEs giving the declarations, which could be
14779 anywhere). But I don't see any reason why the
14780 standards says that they have to be there. */
14781 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14783 if (current_low
!= ((CORE_ADDR
) -1))
14785 best_low
= std::min (best_low
, current_low
);
14786 best_high
= std::max (best_high
, current_high
);
14794 child
= child
->sibling
;
14799 *highpc
= best_high
;
14802 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14806 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14807 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14809 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
14810 struct gdbarch
*gdbarch
= objfile
->arch ();
14811 struct attribute
*attr
;
14812 struct attribute
*attr_high
;
14814 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14817 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14818 if (attr
!= nullptr)
14820 CORE_ADDR low
= attr
->as_address ();
14821 CORE_ADDR high
= attr_high
->as_address ();
14823 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
14826 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14827 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14828 cu
->get_builder ()->record_block_range (block
, low
, high
- 1);
14832 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14833 if (attr
!= nullptr && attr
->form_is_unsigned ())
14835 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
14836 We take advantage of the fact that DW_AT_ranges does not appear
14837 in DW_TAG_compile_unit of DWO files.
14839 Attributes of the form DW_FORM_rnglistx have already had their
14840 value changed by read_rnglist_index and already include
14841 DW_AT_rnglists_base, so don't need to add the ranges base,
14843 int need_ranges_base
= (die
->tag
!= DW_TAG_compile_unit
14844 && attr
->form
!= DW_FORM_rnglistx
);
14846 /* The value of the DW_AT_ranges attribute is the offset of the
14847 address range list in the .debug_ranges section. */
14848 unsigned long offset
= (attr
->as_unsigned ()
14849 + (need_ranges_base
? cu
->ranges_base
: 0));
14851 std::vector
<blockrange
> blockvec
;
14852 dwarf2_ranges_process (offset
, cu
, die
->tag
,
14853 [&] (CORE_ADDR start
, CORE_ADDR end
)
14857 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14858 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14859 cu
->get_builder ()->record_block_range (block
, start
, end
- 1);
14860 blockvec
.emplace_back (start
, end
);
14863 BLOCK_RANGES(block
) = make_blockranges (objfile
, blockvec
);
14867 /* Check whether the producer field indicates either of GCC < 4.6, or the
14868 Intel C/C++ compiler, and cache the result in CU. */
14871 check_producer (struct dwarf2_cu
*cu
)
14875 if (cu
->producer
== NULL
)
14877 /* For unknown compilers expect their behavior is DWARF version
14880 GCC started to support .debug_types sections by -gdwarf-4 since
14881 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14882 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14883 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14884 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14886 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14888 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14889 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14891 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14893 cu
->producer_is_icc
= true;
14894 cu
->producer_is_icc_lt_14
= major
< 14;
14896 else if (startswith (cu
->producer
, "CodeWarrior S12/L-ISA"))
14897 cu
->producer_is_codewarrior
= true;
14900 /* For other non-GCC compilers, expect their behavior is DWARF version
14904 cu
->checked_producer
= true;
14907 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14908 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14909 during 4.6.0 experimental. */
14912 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14914 if (!cu
->checked_producer
)
14915 check_producer (cu
);
14917 return cu
->producer_is_gxx_lt_4_6
;
14921 /* Codewarrior (at least as of version 5.0.40) generates dwarf line information
14922 with incorrect is_stmt attributes. */
14925 producer_is_codewarrior (struct dwarf2_cu
*cu
)
14927 if (!cu
->checked_producer
)
14928 check_producer (cu
);
14930 return cu
->producer_is_codewarrior
;
14933 /* Return the accessibility of DIE, as given by DW_AT_accessibility.
14934 If that attribute is not available, return the appropriate
14937 static enum dwarf_access_attribute
14938 dwarf2_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14940 attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14941 if (attr
!= nullptr)
14943 LONGEST value
= attr
->constant_value (-1);
14944 if (value
== DW_ACCESS_public
14945 || value
== DW_ACCESS_protected
14946 || value
== DW_ACCESS_private
)
14947 return (dwarf_access_attribute
) value
;
14948 complaint (_("Unhandled DW_AT_accessibility value (%s)"),
14952 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14954 /* The default DWARF 2 accessibility for members is public, the default
14955 accessibility for inheritance is private. */
14957 if (die
->tag
!= DW_TAG_inheritance
)
14958 return DW_ACCESS_public
;
14960 return DW_ACCESS_private
;
14964 /* DWARF 3+ defines the default accessibility a different way. The same
14965 rules apply now for DW_TAG_inheritance as for the members and it only
14966 depends on the container kind. */
14968 if (die
->parent
->tag
== DW_TAG_class_type
)
14969 return DW_ACCESS_private
;
14971 return DW_ACCESS_public
;
14975 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14976 offset. If the attribute was not found return 0, otherwise return
14977 1. If it was found but could not properly be handled, set *OFFSET
14981 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14984 struct attribute
*attr
;
14986 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14991 /* Note that we do not check for a section offset first here.
14992 This is because DW_AT_data_member_location is new in DWARF 4,
14993 so if we see it, we can assume that a constant form is really
14994 a constant and not a section offset. */
14995 if (attr
->form_is_constant ())
14996 *offset
= attr
->constant_value (0);
14997 else if (attr
->form_is_section_offset ())
14998 dwarf2_complex_location_expr_complaint ();
14999 else if (attr
->form_is_block ())
15000 *offset
= decode_locdesc (attr
->as_block (), cu
);
15002 dwarf2_complex_location_expr_complaint ();
15010 /* Look for DW_AT_data_member_location and store the results in FIELD. */
15013 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
15014 struct field
*field
)
15016 struct attribute
*attr
;
15018 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
15021 if (attr
->form_is_constant ())
15023 LONGEST offset
= attr
->constant_value (0);
15024 SET_FIELD_BITPOS (*field
, offset
* bits_per_byte
);
15026 else if (attr
->form_is_section_offset ())
15027 dwarf2_complex_location_expr_complaint ();
15028 else if (attr
->form_is_block ())
15031 CORE_ADDR offset
= decode_locdesc (attr
->as_block (), cu
, &handled
);
15033 SET_FIELD_BITPOS (*field
, offset
* bits_per_byte
);
15036 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
15037 struct objfile
*objfile
= per_objfile
->objfile
;
15038 struct dwarf2_locexpr_baton
*dlbaton
15039 = XOBNEW (&objfile
->objfile_obstack
,
15040 struct dwarf2_locexpr_baton
);
15041 dlbaton
->data
= attr
->as_block ()->data
;
15042 dlbaton
->size
= attr
->as_block ()->size
;
15043 /* When using this baton, we want to compute the address
15044 of the field, not the value. This is why
15045 is_reference is set to false here. */
15046 dlbaton
->is_reference
= false;
15047 dlbaton
->per_objfile
= per_objfile
;
15048 dlbaton
->per_cu
= cu
->per_cu
;
15050 SET_FIELD_DWARF_BLOCK (*field
, dlbaton
);
15054 dwarf2_complex_location_expr_complaint ();
15058 /* Add an aggregate field to the field list. */
15061 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
15062 struct dwarf2_cu
*cu
)
15064 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
15065 struct gdbarch
*gdbarch
= objfile
->arch ();
15066 struct nextfield
*new_field
;
15067 struct attribute
*attr
;
15069 const char *fieldname
= "";
15071 if (die
->tag
== DW_TAG_inheritance
)
15073 fip
->baseclasses
.emplace_back ();
15074 new_field
= &fip
->baseclasses
.back ();
15078 fip
->fields
.emplace_back ();
15079 new_field
= &fip
->fields
.back ();
15082 new_field
->offset
= die
->sect_off
;
15084 new_field
->accessibility
= dwarf2_access_attribute (die
, cu
);
15085 if (new_field
->accessibility
!= DW_ACCESS_public
)
15086 fip
->non_public_fields
= true;
15088 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15089 if (attr
!= nullptr)
15090 new_field
->virtuality
= attr
->as_virtuality ();
15092 new_field
->virtuality
= DW_VIRTUALITY_none
;
15094 fp
= &new_field
->field
;
15096 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
15098 /* Data member other than a C++ static data member. */
15100 /* Get type of field. */
15101 fp
->set_type (die_type (die
, cu
));
15103 SET_FIELD_BITPOS (*fp
, 0);
15105 /* Get bit size of field (zero if none). */
15106 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
15107 if (attr
!= nullptr)
15109 FIELD_BITSIZE (*fp
) = attr
->constant_value (0);
15113 FIELD_BITSIZE (*fp
) = 0;
15116 /* Get bit offset of field. */
15117 handle_data_member_location (die
, cu
, fp
);
15118 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
15119 if (attr
!= nullptr && attr
->form_is_constant ())
15121 if (gdbarch_byte_order (gdbarch
) == BFD_ENDIAN_BIG
)
15123 /* For big endian bits, the DW_AT_bit_offset gives the
15124 additional bit offset from the MSB of the containing
15125 anonymous object to the MSB of the field. We don't
15126 have to do anything special since we don't need to
15127 know the size of the anonymous object. */
15128 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
15129 + attr
->constant_value (0)));
15133 /* For little endian bits, compute the bit offset to the
15134 MSB of the anonymous object, subtract off the number of
15135 bits from the MSB of the field to the MSB of the
15136 object, and then subtract off the number of bits of
15137 the field itself. The result is the bit offset of
15138 the LSB of the field. */
15139 int anonymous_size
;
15140 int bit_offset
= attr
->constant_value (0);
15142 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15143 if (attr
!= nullptr && attr
->form_is_constant ())
15145 /* The size of the anonymous object containing
15146 the bit field is explicit, so use the
15147 indicated size (in bytes). */
15148 anonymous_size
= attr
->constant_value (0);
15152 /* The size of the anonymous object containing
15153 the bit field must be inferred from the type
15154 attribute of the data member containing the
15156 anonymous_size
= TYPE_LENGTH (fp
->type ());
15158 SET_FIELD_BITPOS (*fp
,
15159 (FIELD_BITPOS (*fp
)
15160 + anonymous_size
* bits_per_byte
15161 - bit_offset
- FIELD_BITSIZE (*fp
)));
15164 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
15166 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
15167 + attr
->constant_value (0)));
15169 /* Get name of field. */
15170 fieldname
= dwarf2_name (die
, cu
);
15171 if (fieldname
== NULL
)
15174 /* The name is already allocated along with this objfile, so we don't
15175 need to duplicate it for the type. */
15176 fp
->name
= fieldname
;
15178 /* Change accessibility for artificial fields (e.g. virtual table
15179 pointer or virtual base class pointer) to private. */
15180 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
15182 FIELD_ARTIFICIAL (*fp
) = 1;
15183 new_field
->accessibility
= DW_ACCESS_private
;
15184 fip
->non_public_fields
= true;
15187 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
15189 /* C++ static member. */
15191 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
15192 is a declaration, but all versions of G++ as of this writing
15193 (so through at least 3.2.1) incorrectly generate
15194 DW_TAG_variable tags. */
15196 const char *physname
;
15198 /* Get name of field. */
15199 fieldname
= dwarf2_name (die
, cu
);
15200 if (fieldname
== NULL
)
15203 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15205 /* Only create a symbol if this is an external value.
15206 new_symbol checks this and puts the value in the global symbol
15207 table, which we want. If it is not external, new_symbol
15208 will try to put the value in cu->list_in_scope which is wrong. */
15209 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
15211 /* A static const member, not much different than an enum as far as
15212 we're concerned, except that we can support more types. */
15213 new_symbol (die
, NULL
, cu
);
15216 /* Get physical name. */
15217 physname
= dwarf2_physname (fieldname
, die
, cu
);
15219 /* The name is already allocated along with this objfile, so we don't
15220 need to duplicate it for the type. */
15221 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
15222 fp
->set_type (die_type (die
, cu
));
15223 FIELD_NAME (*fp
) = fieldname
;
15225 else if (die
->tag
== DW_TAG_inheritance
)
15227 /* C++ base class field. */
15228 handle_data_member_location (die
, cu
, fp
);
15229 FIELD_BITSIZE (*fp
) = 0;
15230 fp
->set_type (die_type (die
, cu
));
15231 FIELD_NAME (*fp
) = fp
->type ()->name ();
15234 gdb_assert_not_reached ("missing case in dwarf2_add_field");
15237 /* Can the type given by DIE define another type? */
15240 type_can_define_types (const struct die_info
*die
)
15244 case DW_TAG_typedef
:
15245 case DW_TAG_class_type
:
15246 case DW_TAG_structure_type
:
15247 case DW_TAG_union_type
:
15248 case DW_TAG_enumeration_type
:
15256 /* Add a type definition defined in the scope of the FIP's class. */
15259 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
15260 struct dwarf2_cu
*cu
)
15262 struct decl_field fp
;
15263 memset (&fp
, 0, sizeof (fp
));
15265 gdb_assert (type_can_define_types (die
));
15267 /* Get name of field. NULL is okay here, meaning an anonymous type. */
15268 fp
.name
= dwarf2_name (die
, cu
);
15269 fp
.type
= read_type_die (die
, cu
);
15271 /* Save accessibility. */
15272 dwarf_access_attribute accessibility
= dwarf2_access_attribute (die
, cu
);
15273 switch (accessibility
)
15275 case DW_ACCESS_public
:
15276 /* The assumed value if neither private nor protected. */
15278 case DW_ACCESS_private
:
15281 case DW_ACCESS_protected
:
15282 fp
.is_protected
= 1;
15286 if (die
->tag
== DW_TAG_typedef
)
15287 fip
->typedef_field_list
.push_back (fp
);
15289 fip
->nested_types_list
.push_back (fp
);
15292 /* A convenience typedef that's used when finding the discriminant
15293 field for a variant part. */
15294 typedef std::unordered_map
<sect_offset
, int, gdb::hash_enum
<sect_offset
>>
15297 /* Compute the discriminant range for a given variant. OBSTACK is
15298 where the results will be stored. VARIANT is the variant to
15299 process. IS_UNSIGNED indicates whether the discriminant is signed
15302 static const gdb::array_view
<discriminant_range
>
15303 convert_variant_range (struct obstack
*obstack
, const variant_field
&variant
,
15306 std::vector
<discriminant_range
> ranges
;
15308 if (variant
.default_branch
)
15311 if (variant
.discr_list_data
== nullptr)
15313 discriminant_range r
15314 = {variant
.discriminant_value
, variant
.discriminant_value
};
15315 ranges
.push_back (r
);
15319 gdb::array_view
<const gdb_byte
> data (variant
.discr_list_data
->data
,
15320 variant
.discr_list_data
->size
);
15321 while (!data
.empty ())
15323 if (data
[0] != DW_DSC_range
&& data
[0] != DW_DSC_label
)
15325 complaint (_("invalid discriminant marker: %d"), data
[0]);
15328 bool is_range
= data
[0] == DW_DSC_range
;
15329 data
= data
.slice (1);
15331 ULONGEST low
, high
;
15332 unsigned int bytes_read
;
15336 complaint (_("DW_AT_discr_list missing low value"));
15340 low
= read_unsigned_leb128 (nullptr, data
.data (), &bytes_read
);
15342 low
= (ULONGEST
) read_signed_leb128 (nullptr, data
.data (),
15344 data
= data
.slice (bytes_read
);
15350 complaint (_("DW_AT_discr_list missing high value"));
15354 high
= read_unsigned_leb128 (nullptr, data
.data (),
15357 high
= (LONGEST
) read_signed_leb128 (nullptr, data
.data (),
15359 data
= data
.slice (bytes_read
);
15364 ranges
.push_back ({ low
, high
});
15368 discriminant_range
*result
= XOBNEWVEC (obstack
, discriminant_range
,
15370 std::copy (ranges
.begin (), ranges
.end (), result
);
15371 return gdb::array_view
<discriminant_range
> (result
, ranges
.size ());
15374 static const gdb::array_view
<variant_part
> create_variant_parts
15375 (struct obstack
*obstack
,
15376 const offset_map_type
&offset_map
,
15377 struct field_info
*fi
,
15378 const std::vector
<variant_part_builder
> &variant_parts
);
15380 /* Fill in a "struct variant" for a given variant field. RESULT is
15381 the variant to fill in. OBSTACK is where any needed allocations
15382 will be done. OFFSET_MAP holds the mapping from section offsets to
15383 fields for the type. FI describes the fields of the type we're
15384 processing. FIELD is the variant field we're converting. */
15387 create_one_variant (variant
&result
, struct obstack
*obstack
,
15388 const offset_map_type
&offset_map
,
15389 struct field_info
*fi
, const variant_field
&field
)
15391 result
.discriminants
= convert_variant_range (obstack
, field
, false);
15392 result
.first_field
= field
.first_field
+ fi
->baseclasses
.size ();
15393 result
.last_field
= field
.last_field
+ fi
->baseclasses
.size ();
15394 result
.parts
= create_variant_parts (obstack
, offset_map
, fi
,
15395 field
.variant_parts
);
15398 /* Fill in a "struct variant_part" for a given variant part. RESULT
15399 is the variant part to fill in. OBSTACK is where any needed
15400 allocations will be done. OFFSET_MAP holds the mapping from
15401 section offsets to fields for the type. FI describes the fields of
15402 the type we're processing. BUILDER is the variant part to be
15406 create_one_variant_part (variant_part
&result
,
15407 struct obstack
*obstack
,
15408 const offset_map_type
&offset_map
,
15409 struct field_info
*fi
,
15410 const variant_part_builder
&builder
)
15412 auto iter
= offset_map
.find (builder
.discriminant_offset
);
15413 if (iter
== offset_map
.end ())
15415 result
.discriminant_index
= -1;
15416 /* Doesn't matter. */
15417 result
.is_unsigned
= false;
15421 result
.discriminant_index
= iter
->second
;
15423 = fi
->fields
[result
.discriminant_index
].field
.type ()->is_unsigned ();
15426 size_t n
= builder
.variants
.size ();
15427 variant
*output
= new (obstack
) variant
[n
];
15428 for (size_t i
= 0; i
< n
; ++i
)
15429 create_one_variant (output
[i
], obstack
, offset_map
, fi
,
15430 builder
.variants
[i
]);
15432 result
.variants
= gdb::array_view
<variant
> (output
, n
);
15435 /* Create a vector of variant parts that can be attached to a type.
15436 OBSTACK is where any needed allocations will be done. OFFSET_MAP
15437 holds the mapping from section offsets to fields for the type. FI
15438 describes the fields of the type we're processing. VARIANT_PARTS
15439 is the vector to convert. */
15441 static const gdb::array_view
<variant_part
>
15442 create_variant_parts (struct obstack
*obstack
,
15443 const offset_map_type
&offset_map
,
15444 struct field_info
*fi
,
15445 const std::vector
<variant_part_builder
> &variant_parts
)
15447 if (variant_parts
.empty ())
15450 size_t n
= variant_parts
.size ();
15451 variant_part
*result
= new (obstack
) variant_part
[n
];
15452 for (size_t i
= 0; i
< n
; ++i
)
15453 create_one_variant_part (result
[i
], obstack
, offset_map
, fi
,
15456 return gdb::array_view
<variant_part
> (result
, n
);
15459 /* Compute the variant part vector for FIP, attaching it to TYPE when
15463 add_variant_property (struct field_info
*fip
, struct type
*type
,
15464 struct dwarf2_cu
*cu
)
15466 /* Map section offsets of fields to their field index. Note the
15467 field index here does not take the number of baseclasses into
15469 offset_map_type offset_map
;
15470 for (int i
= 0; i
< fip
->fields
.size (); ++i
)
15471 offset_map
[fip
->fields
[i
].offset
] = i
;
15473 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
15474 gdb::array_view
<variant_part
> parts
15475 = create_variant_parts (&objfile
->objfile_obstack
, offset_map
, fip
,
15476 fip
->variant_parts
);
15478 struct dynamic_prop prop
;
15479 prop
.set_variant_parts ((gdb::array_view
<variant_part
> *)
15480 obstack_copy (&objfile
->objfile_obstack
, &parts
,
15483 type
->add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
);
15486 /* Create the vector of fields, and attach it to the type. */
15489 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
15490 struct dwarf2_cu
*cu
)
15492 int nfields
= fip
->nfields ();
15494 /* Record the field count, allocate space for the array of fields,
15495 and create blank accessibility bitfields if necessary. */
15496 type
->set_num_fields (nfields
);
15498 ((struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
));
15500 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
15502 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15504 TYPE_FIELD_PRIVATE_BITS (type
) =
15505 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15506 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
15508 TYPE_FIELD_PROTECTED_BITS (type
) =
15509 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15510 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
15512 TYPE_FIELD_IGNORE_BITS (type
) =
15513 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15514 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
15517 /* If the type has baseclasses, allocate and clear a bit vector for
15518 TYPE_FIELD_VIRTUAL_BITS. */
15519 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
15521 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
15522 unsigned char *pointer
;
15524 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15525 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
15526 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
15527 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
15528 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
15531 if (!fip
->variant_parts
.empty ())
15532 add_variant_property (fip
, type
, cu
);
15534 /* Copy the saved-up fields into the field vector. */
15535 for (int i
= 0; i
< nfields
; ++i
)
15537 struct nextfield
&field
15538 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
15539 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
15541 type
->field (i
) = field
.field
;
15542 switch (field
.accessibility
)
15544 case DW_ACCESS_private
:
15545 if (cu
->language
!= language_ada
)
15546 SET_TYPE_FIELD_PRIVATE (type
, i
);
15549 case DW_ACCESS_protected
:
15550 if (cu
->language
!= language_ada
)
15551 SET_TYPE_FIELD_PROTECTED (type
, i
);
15554 case DW_ACCESS_public
:
15558 /* Unknown accessibility. Complain and treat it as public. */
15560 complaint (_("unsupported accessibility %d"),
15561 field
.accessibility
);
15565 if (i
< fip
->baseclasses
.size ())
15567 switch (field
.virtuality
)
15569 case DW_VIRTUALITY_virtual
:
15570 case DW_VIRTUALITY_pure_virtual
:
15571 if (cu
->language
== language_ada
)
15572 error (_("unexpected virtuality in component of Ada type"));
15573 SET_TYPE_FIELD_VIRTUAL (type
, i
);
15580 /* Return true if this member function is a constructor, false
15584 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
15586 const char *fieldname
;
15587 const char *type_name
;
15590 if (die
->parent
== NULL
)
15593 if (die
->parent
->tag
!= DW_TAG_structure_type
15594 && die
->parent
->tag
!= DW_TAG_union_type
15595 && die
->parent
->tag
!= DW_TAG_class_type
)
15598 fieldname
= dwarf2_name (die
, cu
);
15599 type_name
= dwarf2_name (die
->parent
, cu
);
15600 if (fieldname
== NULL
|| type_name
== NULL
)
15603 len
= strlen (fieldname
);
15604 return (strncmp (fieldname
, type_name
, len
) == 0
15605 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
15608 /* Add a member function to the proper fieldlist. */
15611 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15612 struct type
*type
, struct dwarf2_cu
*cu
)
15614 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
15615 struct attribute
*attr
;
15617 struct fnfieldlist
*flp
= nullptr;
15618 struct fn_field
*fnp
;
15619 const char *fieldname
;
15620 struct type
*this_type
;
15622 if (cu
->language
== language_ada
)
15623 error (_("unexpected member function in Ada type"));
15625 /* Get name of member function. */
15626 fieldname
= dwarf2_name (die
, cu
);
15627 if (fieldname
== NULL
)
15630 /* Look up member function name in fieldlist. */
15631 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15633 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15635 flp
= &fip
->fnfieldlists
[i
];
15640 /* Create a new fnfieldlist if necessary. */
15641 if (flp
== nullptr)
15643 fip
->fnfieldlists
.emplace_back ();
15644 flp
= &fip
->fnfieldlists
.back ();
15645 flp
->name
= fieldname
;
15646 i
= fip
->fnfieldlists
.size () - 1;
15649 /* Create a new member function field and add it to the vector of
15651 flp
->fnfields
.emplace_back ();
15652 fnp
= &flp
->fnfields
.back ();
15654 /* Delay processing of the physname until later. */
15655 if (cu
->language
== language_cplus
)
15656 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15660 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15661 fnp
->physname
= physname
? physname
: "";
15664 fnp
->type
= alloc_type (objfile
);
15665 this_type
= read_type_die (die
, cu
);
15666 if (this_type
&& this_type
->code () == TYPE_CODE_FUNC
)
15668 int nparams
= this_type
->num_fields ();
15670 /* TYPE is the domain of this method, and THIS_TYPE is the type
15671 of the method itself (TYPE_CODE_METHOD). */
15672 smash_to_method_type (fnp
->type
, type
,
15673 TYPE_TARGET_TYPE (this_type
),
15674 this_type
->fields (),
15675 this_type
->num_fields (),
15676 this_type
->has_varargs ());
15678 /* Handle static member functions.
15679 Dwarf2 has no clean way to discern C++ static and non-static
15680 member functions. G++ helps GDB by marking the first
15681 parameter for non-static member functions (which is the this
15682 pointer) as artificial. We obtain this information from
15683 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15684 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15685 fnp
->voffset
= VOFFSET_STATIC
;
15688 complaint (_("member function type missing for '%s'"),
15689 dwarf2_full_name (fieldname
, die
, cu
));
15691 /* Get fcontext from DW_AT_containing_type if present. */
15692 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15693 fnp
->fcontext
= die_containing_type (die
, cu
);
15695 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15696 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15698 /* Get accessibility. */
15699 dwarf_access_attribute accessibility
= dwarf2_access_attribute (die
, cu
);
15700 switch (accessibility
)
15702 case DW_ACCESS_private
:
15703 fnp
->is_private
= 1;
15705 case DW_ACCESS_protected
:
15706 fnp
->is_protected
= 1;
15710 /* Check for artificial methods. */
15711 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15712 if (attr
&& attr
->as_boolean ())
15713 fnp
->is_artificial
= 1;
15715 /* Check for defaulted methods. */
15716 attr
= dwarf2_attr (die
, DW_AT_defaulted
, cu
);
15717 if (attr
!= nullptr)
15718 fnp
->defaulted
= attr
->defaulted ();
15720 /* Check for deleted methods. */
15721 attr
= dwarf2_attr (die
, DW_AT_deleted
, cu
);
15722 if (attr
!= nullptr && attr
->as_boolean ())
15723 fnp
->is_deleted
= 1;
15725 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15727 /* Get index in virtual function table if it is a virtual member
15728 function. For older versions of GCC, this is an offset in the
15729 appropriate virtual table, as specified by DW_AT_containing_type.
15730 For everyone else, it is an expression to be evaluated relative
15731 to the object address. */
15733 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15734 if (attr
!= nullptr)
15736 if (attr
->form_is_block () && attr
->as_block ()->size
> 0)
15738 struct dwarf_block
*block
= attr
->as_block ();
15740 if (block
->data
[0] == DW_OP_constu
)
15742 /* Old-style GCC. */
15743 fnp
->voffset
= decode_locdesc (block
, cu
) + 2;
15745 else if (block
->data
[0] == DW_OP_deref
15746 || (block
->size
> 1
15747 && block
->data
[0] == DW_OP_deref_size
15748 && block
->data
[1] == cu
->header
.addr_size
))
15750 fnp
->voffset
= decode_locdesc (block
, cu
);
15751 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15752 dwarf2_complex_location_expr_complaint ();
15754 fnp
->voffset
/= cu
->header
.addr_size
;
15758 dwarf2_complex_location_expr_complaint ();
15760 if (!fnp
->fcontext
)
15762 /* If there is no `this' field and no DW_AT_containing_type,
15763 we cannot actually find a base class context for the
15765 if (this_type
->num_fields () == 0
15766 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15768 complaint (_("cannot determine context for virtual member "
15769 "function \"%s\" (offset %s)"),
15770 fieldname
, sect_offset_str (die
->sect_off
));
15775 = TYPE_TARGET_TYPE (this_type
->field (0).type ());
15779 else if (attr
->form_is_section_offset ())
15781 dwarf2_complex_location_expr_complaint ();
15785 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15791 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15792 if (attr
!= nullptr && attr
->as_virtuality () != DW_VIRTUALITY_none
)
15794 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15795 complaint (_("Member function \"%s\" (offset %s) is virtual "
15796 "but the vtable offset is not specified"),
15797 fieldname
, sect_offset_str (die
->sect_off
));
15798 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15799 TYPE_CPLUS_DYNAMIC (type
) = 1;
15804 /* Create the vector of member function fields, and attach it to the type. */
15807 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15808 struct dwarf2_cu
*cu
)
15810 if (cu
->language
== language_ada
)
15811 error (_("unexpected member functions in Ada type"));
15813 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15814 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15816 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15818 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15820 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15821 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15823 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15824 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15825 fn_flp
->fn_fields
= (struct fn_field
*)
15826 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15828 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15829 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15832 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15835 /* Returns non-zero if NAME is the name of a vtable member in CU's
15836 language, zero otherwise. */
15838 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15840 static const char vptr
[] = "_vptr";
15842 /* Look for the C++ form of the vtable. */
15843 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15849 /* GCC outputs unnamed structures that are really pointers to member
15850 functions, with the ABI-specified layout. If TYPE describes
15851 such a structure, smash it into a member function type.
15853 GCC shouldn't do this; it should just output pointer to member DIEs.
15854 This is GCC PR debug/28767. */
15857 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15859 struct type
*pfn_type
, *self_type
, *new_type
;
15861 /* Check for a structure with no name and two children. */
15862 if (type
->code () != TYPE_CODE_STRUCT
|| type
->num_fields () != 2)
15865 /* Check for __pfn and __delta members. */
15866 if (TYPE_FIELD_NAME (type
, 0) == NULL
15867 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15868 || TYPE_FIELD_NAME (type
, 1) == NULL
15869 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15872 /* Find the type of the method. */
15873 pfn_type
= type
->field (0).type ();
15874 if (pfn_type
== NULL
15875 || pfn_type
->code () != TYPE_CODE_PTR
15876 || TYPE_TARGET_TYPE (pfn_type
)->code () != TYPE_CODE_FUNC
)
15879 /* Look for the "this" argument. */
15880 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15881 if (pfn_type
->num_fields () == 0
15882 /* || pfn_type->field (0).type () == NULL */
15883 || pfn_type
->field (0).type ()->code () != TYPE_CODE_PTR
)
15886 self_type
= TYPE_TARGET_TYPE (pfn_type
->field (0).type ());
15887 new_type
= alloc_type (objfile
);
15888 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15889 pfn_type
->fields (), pfn_type
->num_fields (),
15890 pfn_type
->has_varargs ());
15891 smash_to_methodptr_type (type
, new_type
);
15894 /* Helper for quirk_ada_thick_pointer. If TYPE is an array type that
15895 requires rewriting, then copy it and return the updated copy.
15896 Otherwise return nullptr. */
15898 static struct type
*
15899 rewrite_array_type (struct type
*type
)
15901 if (type
->code () != TYPE_CODE_ARRAY
)
15904 struct type
*index_type
= type
->index_type ();
15905 range_bounds
*current_bounds
= index_type
->bounds ();
15907 /* Handle multi-dimensional arrays. */
15908 struct type
*new_target
= rewrite_array_type (TYPE_TARGET_TYPE (type
));
15909 if (new_target
== nullptr)
15911 /* Maybe we don't need to rewrite this array. */
15912 if (current_bounds
->low
.kind () == PROP_CONST
15913 && current_bounds
->high
.kind () == PROP_CONST
)
15917 /* Either the target type was rewritten, or the bounds have to be
15918 updated. Either way we want to copy the type and update
15920 struct type
*copy
= copy_type (type
);
15921 int nfields
= copy
->num_fields ();
15923 = ((struct field
*) TYPE_ZALLOC (copy
,
15924 nfields
* sizeof (struct field
)));
15925 memcpy (new_fields
, copy
->fields (), nfields
* sizeof (struct field
));
15926 copy
->set_fields (new_fields
);
15927 if (new_target
!= nullptr)
15928 TYPE_TARGET_TYPE (copy
) = new_target
;
15930 struct type
*index_copy
= copy_type (index_type
);
15931 range_bounds
*bounds
15932 = (struct range_bounds
*) TYPE_ZALLOC (index_copy
,
15933 sizeof (range_bounds
));
15934 *bounds
= *current_bounds
;
15935 bounds
->low
.set_const_val (1);
15936 bounds
->high
.set_const_val (0);
15937 index_copy
->set_bounds (bounds
);
15938 copy
->set_index_type (index_copy
);
15943 /* While some versions of GCC will generate complicated DWARF for an
15944 array (see quirk_ada_thick_pointer), more recent versions were
15945 modified to emit an explicit thick pointer structure. However, in
15946 this case, the array still has DWARF expressions for its ranges,
15947 and these must be ignored. */
15950 quirk_ada_thick_pointer_struct (struct die_info
*die
, struct dwarf2_cu
*cu
,
15953 gdb_assert (cu
->language
== language_ada
);
15955 /* Check for a structure with two children. */
15956 if (type
->code () != TYPE_CODE_STRUCT
|| type
->num_fields () != 2)
15959 /* Check for P_ARRAY and P_BOUNDS members. */
15960 if (TYPE_FIELD_NAME (type
, 0) == NULL
15961 || strcmp (TYPE_FIELD_NAME (type
, 0), "P_ARRAY") != 0
15962 || TYPE_FIELD_NAME (type
, 1) == NULL
15963 || strcmp (TYPE_FIELD_NAME (type
, 1), "P_BOUNDS") != 0)
15966 /* Make sure we're looking at a pointer to an array. */
15967 if (type
->field (0).type ()->code () != TYPE_CODE_PTR
)
15970 /* The Ada code already knows how to handle these types, so all that
15971 we need to do is turn the bounds into static bounds. However, we
15972 don't want to rewrite existing array or index types in-place,
15973 because those may be referenced in other contexts where this
15974 rewriting is undesirable. */
15975 struct type
*new_ary_type
15976 = rewrite_array_type (TYPE_TARGET_TYPE (type
->field (0).type ()));
15977 if (new_ary_type
!= nullptr)
15978 type
->field (0).set_type (lookup_pointer_type (new_ary_type
));
15981 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15982 appropriate error checking and issuing complaints if there is a
15986 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15988 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15990 if (attr
== nullptr)
15993 if (!attr
->form_is_constant ())
15995 complaint (_("DW_AT_alignment must have constant form"
15996 " - DIE at %s [in module %s]"),
15997 sect_offset_str (die
->sect_off
),
15998 objfile_name (cu
->per_objfile
->objfile
));
16002 LONGEST val
= attr
->constant_value (0);
16005 complaint (_("DW_AT_alignment value must not be negative"
16006 " - DIE at %s [in module %s]"),
16007 sect_offset_str (die
->sect_off
),
16008 objfile_name (cu
->per_objfile
->objfile
));
16011 ULONGEST align
= val
;
16015 complaint (_("DW_AT_alignment value must not be zero"
16016 " - DIE at %s [in module %s]"),
16017 sect_offset_str (die
->sect_off
),
16018 objfile_name (cu
->per_objfile
->objfile
));
16021 if ((align
& (align
- 1)) != 0)
16023 complaint (_("DW_AT_alignment value must be a power of 2"
16024 " - DIE at %s [in module %s]"),
16025 sect_offset_str (die
->sect_off
),
16026 objfile_name (cu
->per_objfile
->objfile
));
16033 /* If the DIE has a DW_AT_alignment attribute, use its value to set
16034 the alignment for TYPE. */
16037 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
16040 if (!set_type_align (type
, get_alignment (cu
, die
)))
16041 complaint (_("DW_AT_alignment value too large"
16042 " - DIE at %s [in module %s]"),
16043 sect_offset_str (die
->sect_off
),
16044 objfile_name (cu
->per_objfile
->objfile
));
16047 /* Check if the given VALUE is a valid enum dwarf_calling_convention
16048 constant for a type, according to DWARF5 spec, Table 5.5. */
16051 is_valid_DW_AT_calling_convention_for_type (ULONGEST value
)
16056 case DW_CC_pass_by_reference
:
16057 case DW_CC_pass_by_value
:
16061 complaint (_("unrecognized DW_AT_calling_convention value "
16062 "(%s) for a type"), pulongest (value
));
16067 /* Check if the given VALUE is a valid enum dwarf_calling_convention
16068 constant for a subroutine, according to DWARF5 spec, Table 3.3, and
16069 also according to GNU-specific values (see include/dwarf2.h). */
16072 is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value
)
16077 case DW_CC_program
:
16081 case DW_CC_GNU_renesas_sh
:
16082 case DW_CC_GNU_borland_fastcall_i386
:
16083 case DW_CC_GDB_IBM_OpenCL
:
16087 complaint (_("unrecognized DW_AT_calling_convention value "
16088 "(%s) for a subroutine"), pulongest (value
));
16093 /* Called when we find the DIE that starts a structure or union scope
16094 (definition) to create a type for the structure or union. Fill in
16095 the type's name and general properties; the members will not be
16096 processed until process_structure_scope. A symbol table entry for
16097 the type will also not be done until process_structure_scope (assuming
16098 the type has a name).
16100 NOTE: we need to call these functions regardless of whether or not the
16101 DIE has a DW_AT_name attribute, since it might be an anonymous
16102 structure or union. This gets the type entered into our set of
16103 user defined types. */
16105 static struct type
*
16106 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16108 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16110 struct attribute
*attr
;
16113 /* If the definition of this type lives in .debug_types, read that type.
16114 Don't follow DW_AT_specification though, that will take us back up
16115 the chain and we want to go down. */
16116 attr
= die
->attr (DW_AT_signature
);
16117 if (attr
!= nullptr)
16119 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16121 /* The type's CU may not be the same as CU.
16122 Ensure TYPE is recorded with CU in die_type_hash. */
16123 return set_die_type (die
, type
, cu
);
16126 type
= alloc_type (objfile
);
16127 INIT_CPLUS_SPECIFIC (type
);
16129 name
= dwarf2_name (die
, cu
);
16132 if (cu
->language
== language_cplus
16133 || cu
->language
== language_d
16134 || cu
->language
== language_rust
)
16136 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
16138 /* dwarf2_full_name might have already finished building the DIE's
16139 type. If so, there is no need to continue. */
16140 if (get_die_type (die
, cu
) != NULL
)
16141 return get_die_type (die
, cu
);
16143 type
->set_name (full_name
);
16147 /* The name is already allocated along with this objfile, so
16148 we don't need to duplicate it for the type. */
16149 type
->set_name (name
);
16153 if (die
->tag
== DW_TAG_structure_type
)
16155 type
->set_code (TYPE_CODE_STRUCT
);
16157 else if (die
->tag
== DW_TAG_union_type
)
16159 type
->set_code (TYPE_CODE_UNION
);
16163 type
->set_code (TYPE_CODE_STRUCT
);
16166 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
16167 TYPE_DECLARED_CLASS (type
) = 1;
16169 /* Store the calling convention in the type if it's available in
16170 the die. Otherwise the calling convention remains set to
16171 the default value DW_CC_normal. */
16172 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
16173 if (attr
!= nullptr
16174 && is_valid_DW_AT_calling_convention_for_type (attr
->constant_value (0)))
16176 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16177 TYPE_CPLUS_CALLING_CONVENTION (type
)
16178 = (enum dwarf_calling_convention
) (attr
->constant_value (0));
16181 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16182 if (attr
!= nullptr)
16184 if (attr
->form_is_constant ())
16185 TYPE_LENGTH (type
) = attr
->constant_value (0);
16188 struct dynamic_prop prop
;
16189 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, cu
->addr_type ()))
16190 type
->add_dyn_prop (DYN_PROP_BYTE_SIZE
, prop
);
16191 TYPE_LENGTH (type
) = 0;
16196 TYPE_LENGTH (type
) = 0;
16199 maybe_set_alignment (cu
, die
, type
);
16201 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
16203 /* ICC<14 does not output the required DW_AT_declaration on
16204 incomplete types, but gives them a size of zero. */
16205 type
->set_is_stub (true);
16208 type
->set_stub_is_supported (true);
16210 if (die_is_declaration (die
, cu
))
16211 type
->set_is_stub (true);
16212 else if (attr
== NULL
&& die
->child
== NULL
16213 && producer_is_realview (cu
->producer
))
16214 /* RealView does not output the required DW_AT_declaration
16215 on incomplete types. */
16216 type
->set_is_stub (true);
16218 /* We need to add the type field to the die immediately so we don't
16219 infinitely recurse when dealing with pointers to the structure
16220 type within the structure itself. */
16221 set_die_type (die
, type
, cu
);
16223 /* set_die_type should be already done. */
16224 set_descriptive_type (type
, die
, cu
);
16229 static void handle_struct_member_die
16230 (struct die_info
*child_die
,
16232 struct field_info
*fi
,
16233 std::vector
<struct symbol
*> *template_args
,
16234 struct dwarf2_cu
*cu
);
16236 /* A helper for handle_struct_member_die that handles
16237 DW_TAG_variant_part. */
16240 handle_variant_part (struct die_info
*die
, struct type
*type
,
16241 struct field_info
*fi
,
16242 std::vector
<struct symbol
*> *template_args
,
16243 struct dwarf2_cu
*cu
)
16245 variant_part_builder
*new_part
;
16246 if (fi
->current_variant_part
== nullptr)
16248 fi
->variant_parts
.emplace_back ();
16249 new_part
= &fi
->variant_parts
.back ();
16251 else if (!fi
->current_variant_part
->processing_variant
)
16253 complaint (_("nested DW_TAG_variant_part seen "
16254 "- DIE at %s [in module %s]"),
16255 sect_offset_str (die
->sect_off
),
16256 objfile_name (cu
->per_objfile
->objfile
));
16261 variant_field
¤t
= fi
->current_variant_part
->variants
.back ();
16262 current
.variant_parts
.emplace_back ();
16263 new_part
= ¤t
.variant_parts
.back ();
16266 /* When we recurse, we want callees to add to this new variant
16268 scoped_restore save_current_variant_part
16269 = make_scoped_restore (&fi
->current_variant_part
, new_part
);
16271 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
16274 /* It's a univariant form, an extension we support. */
16276 else if (discr
->form_is_ref ())
16278 struct dwarf2_cu
*target_cu
= cu
;
16279 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
16281 new_part
->discriminant_offset
= target_die
->sect_off
;
16285 complaint (_("DW_AT_discr does not have DIE reference form"
16286 " - DIE at %s [in module %s]"),
16287 sect_offset_str (die
->sect_off
),
16288 objfile_name (cu
->per_objfile
->objfile
));
16291 for (die_info
*child_die
= die
->child
;
16293 child_die
= child_die
->sibling
)
16294 handle_struct_member_die (child_die
, type
, fi
, template_args
, cu
);
16297 /* A helper for handle_struct_member_die that handles
16301 handle_variant (struct die_info
*die
, struct type
*type
,
16302 struct field_info
*fi
,
16303 std::vector
<struct symbol
*> *template_args
,
16304 struct dwarf2_cu
*cu
)
16306 if (fi
->current_variant_part
== nullptr)
16308 complaint (_("saw DW_TAG_variant outside DW_TAG_variant_part "
16309 "- DIE at %s [in module %s]"),
16310 sect_offset_str (die
->sect_off
),
16311 objfile_name (cu
->per_objfile
->objfile
));
16314 if (fi
->current_variant_part
->processing_variant
)
16316 complaint (_("nested DW_TAG_variant seen "
16317 "- DIE at %s [in module %s]"),
16318 sect_offset_str (die
->sect_off
),
16319 objfile_name (cu
->per_objfile
->objfile
));
16323 scoped_restore save_processing_variant
16324 = make_scoped_restore (&fi
->current_variant_part
->processing_variant
,
16327 fi
->current_variant_part
->variants
.emplace_back ();
16328 variant_field
&variant
= fi
->current_variant_part
->variants
.back ();
16329 variant
.first_field
= fi
->fields
.size ();
16331 /* In a variant we want to get the discriminant and also add a
16332 field for our sole member child. */
16333 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr_value
, cu
);
16334 if (discr
== nullptr || !discr
->form_is_constant ())
16336 discr
= dwarf2_attr (die
, DW_AT_discr_list
, cu
);
16337 if (discr
== nullptr || discr
->as_block ()->size
== 0)
16338 variant
.default_branch
= true;
16340 variant
.discr_list_data
= discr
->as_block ();
16343 variant
.discriminant_value
= discr
->constant_value (0);
16345 for (die_info
*variant_child
= die
->child
;
16346 variant_child
!= NULL
;
16347 variant_child
= variant_child
->sibling
)
16348 handle_struct_member_die (variant_child
, type
, fi
, template_args
, cu
);
16350 variant
.last_field
= fi
->fields
.size ();
16353 /* A helper for process_structure_scope that handles a single member
16357 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
16358 struct field_info
*fi
,
16359 std::vector
<struct symbol
*> *template_args
,
16360 struct dwarf2_cu
*cu
)
16362 if (child_die
->tag
== DW_TAG_member
16363 || child_die
->tag
== DW_TAG_variable
)
16365 /* NOTE: carlton/2002-11-05: A C++ static data member
16366 should be a DW_TAG_member that is a declaration, but
16367 all versions of G++ as of this writing (so through at
16368 least 3.2.1) incorrectly generate DW_TAG_variable
16369 tags for them instead. */
16370 dwarf2_add_field (fi
, child_die
, cu
);
16372 else if (child_die
->tag
== DW_TAG_subprogram
)
16374 /* Rust doesn't have member functions in the C++ sense.
16375 However, it does emit ordinary functions as children
16376 of a struct DIE. */
16377 if (cu
->language
== language_rust
)
16378 read_func_scope (child_die
, cu
);
16381 /* C++ member function. */
16382 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
16385 else if (child_die
->tag
== DW_TAG_inheritance
)
16387 /* C++ base class field. */
16388 dwarf2_add_field (fi
, child_die
, cu
);
16390 else if (type_can_define_types (child_die
))
16391 dwarf2_add_type_defn (fi
, child_die
, cu
);
16392 else if (child_die
->tag
== DW_TAG_template_type_param
16393 || child_die
->tag
== DW_TAG_template_value_param
)
16395 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
16398 template_args
->push_back (arg
);
16400 else if (child_die
->tag
== DW_TAG_variant_part
)
16401 handle_variant_part (child_die
, type
, fi
, template_args
, cu
);
16402 else if (child_die
->tag
== DW_TAG_variant
)
16403 handle_variant (child_die
, type
, fi
, template_args
, cu
);
16406 /* Finish creating a structure or union type, including filling in
16407 its members and creating a symbol for it. */
16410 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16412 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16413 struct die_info
*child_die
;
16416 type
= get_die_type (die
, cu
);
16418 type
= read_structure_type (die
, cu
);
16420 bool has_template_parameters
= false;
16421 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
16423 struct field_info fi
;
16424 std::vector
<struct symbol
*> template_args
;
16426 child_die
= die
->child
;
16428 while (child_die
&& child_die
->tag
)
16430 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
16431 child_die
= child_die
->sibling
;
16434 /* Attach template arguments to type. */
16435 if (!template_args
.empty ())
16437 has_template_parameters
= true;
16438 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16439 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
16440 TYPE_TEMPLATE_ARGUMENTS (type
)
16441 = XOBNEWVEC (&objfile
->objfile_obstack
,
16443 TYPE_N_TEMPLATE_ARGUMENTS (type
));
16444 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
16445 template_args
.data (),
16446 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
16447 * sizeof (struct symbol
*)));
16450 /* Attach fields and member functions to the type. */
16451 if (fi
.nfields () > 0)
16452 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
16453 if (!fi
.fnfieldlists
.empty ())
16455 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
16457 /* Get the type which refers to the base class (possibly this
16458 class itself) which contains the vtable pointer for the current
16459 class from the DW_AT_containing_type attribute. This use of
16460 DW_AT_containing_type is a GNU extension. */
16462 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
16464 struct type
*t
= die_containing_type (die
, cu
);
16466 set_type_vptr_basetype (type
, t
);
16471 /* Our own class provides vtbl ptr. */
16472 for (i
= t
->num_fields () - 1;
16473 i
>= TYPE_N_BASECLASSES (t
);
16476 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
16478 if (is_vtable_name (fieldname
, cu
))
16480 set_type_vptr_fieldno (type
, i
);
16485 /* Complain if virtual function table field not found. */
16486 if (i
< TYPE_N_BASECLASSES (t
))
16487 complaint (_("virtual function table pointer "
16488 "not found when defining class '%s'"),
16489 type
->name () ? type
->name () : "");
16493 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
16496 else if (cu
->producer
16497 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
16499 /* The IBM XLC compiler does not provide direct indication
16500 of the containing type, but the vtable pointer is
16501 always named __vfp. */
16505 for (i
= type
->num_fields () - 1;
16506 i
>= TYPE_N_BASECLASSES (type
);
16509 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
16511 set_type_vptr_fieldno (type
, i
);
16512 set_type_vptr_basetype (type
, type
);
16519 /* Copy fi.typedef_field_list linked list elements content into the
16520 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
16521 if (!fi
.typedef_field_list
.empty ())
16523 int count
= fi
.typedef_field_list
.size ();
16525 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16526 TYPE_TYPEDEF_FIELD_ARRAY (type
)
16527 = ((struct decl_field
*)
16529 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
16530 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
16532 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
16533 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
16536 /* Copy fi.nested_types_list linked list elements content into the
16537 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
16538 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
16540 int count
= fi
.nested_types_list
.size ();
16542 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16543 TYPE_NESTED_TYPES_ARRAY (type
)
16544 = ((struct decl_field
*)
16545 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
16546 TYPE_NESTED_TYPES_COUNT (type
) = count
;
16548 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
16549 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
16553 quirk_gcc_member_function_pointer (type
, objfile
);
16554 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
16555 cu
->rust_unions
.push_back (type
);
16556 else if (cu
->language
== language_ada
)
16557 quirk_ada_thick_pointer_struct (die
, cu
, type
);
16559 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
16560 snapshots) has been known to create a die giving a declaration
16561 for a class that has, as a child, a die giving a definition for a
16562 nested class. So we have to process our children even if the
16563 current die is a declaration. Normally, of course, a declaration
16564 won't have any children at all. */
16566 child_die
= die
->child
;
16568 while (child_die
!= NULL
&& child_die
->tag
)
16570 if (child_die
->tag
== DW_TAG_member
16571 || child_die
->tag
== DW_TAG_variable
16572 || child_die
->tag
== DW_TAG_inheritance
16573 || child_die
->tag
== DW_TAG_template_value_param
16574 || child_die
->tag
== DW_TAG_template_type_param
)
16579 process_die (child_die
, cu
);
16581 child_die
= child_die
->sibling
;
16584 /* Do not consider external references. According to the DWARF standard,
16585 these DIEs are identified by the fact that they have no byte_size
16586 attribute, and a declaration attribute. */
16587 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
16588 || !die_is_declaration (die
, cu
)
16589 || dwarf2_attr (die
, DW_AT_signature
, cu
) != NULL
)
16591 struct symbol
*sym
= new_symbol (die
, type
, cu
);
16593 if (has_template_parameters
)
16595 struct symtab
*symtab
;
16596 if (sym
!= nullptr)
16597 symtab
= symbol_symtab (sym
);
16598 else if (cu
->line_header
!= nullptr)
16600 /* Any related symtab will do. */
16602 = cu
->line_header
->file_names ()[0].symtab
;
16607 complaint (_("could not find suitable "
16608 "symtab for template parameter"
16609 " - DIE at %s [in module %s]"),
16610 sect_offset_str (die
->sect_off
),
16611 objfile_name (objfile
));
16614 if (symtab
!= nullptr)
16616 /* Make sure that the symtab is set on the new symbols.
16617 Even though they don't appear in this symtab directly,
16618 other parts of gdb assume that symbols do, and this is
16619 reasonably true. */
16620 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
16621 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
), symtab
);
16627 /* Assuming DIE is an enumeration type, and TYPE is its associated
16628 type, update TYPE using some information only available in DIE's
16629 children. In particular, the fields are computed. */
16632 update_enumeration_type_from_children (struct die_info
*die
,
16634 struct dwarf2_cu
*cu
)
16636 struct die_info
*child_die
;
16637 int unsigned_enum
= 1;
16640 auto_obstack obstack
;
16641 std::vector
<struct field
> fields
;
16643 for (child_die
= die
->child
;
16644 child_die
!= NULL
&& child_die
->tag
;
16645 child_die
= child_die
->sibling
)
16647 struct attribute
*attr
;
16649 const gdb_byte
*bytes
;
16650 struct dwarf2_locexpr_baton
*baton
;
16653 if (child_die
->tag
!= DW_TAG_enumerator
)
16656 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
16660 name
= dwarf2_name (child_die
, cu
);
16662 name
= "<anonymous enumerator>";
16664 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
16665 &value
, &bytes
, &baton
);
16673 if (count_one_bits_ll (value
) >= 2)
16677 fields
.emplace_back ();
16678 struct field
&field
= fields
.back ();
16679 FIELD_NAME (field
) = dwarf2_physname (name
, child_die
, cu
);
16680 SET_FIELD_ENUMVAL (field
, value
);
16683 if (!fields
.empty ())
16685 type
->set_num_fields (fields
.size ());
16688 TYPE_ALLOC (type
, sizeof (struct field
) * fields
.size ()));
16689 memcpy (type
->fields (), fields
.data (),
16690 sizeof (struct field
) * fields
.size ());
16694 type
->set_is_unsigned (true);
16697 TYPE_FLAG_ENUM (type
) = 1;
16700 /* Given a DW_AT_enumeration_type die, set its type. We do not
16701 complete the type's fields yet, or create any symbols. */
16703 static struct type
*
16704 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16706 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16708 struct attribute
*attr
;
16711 /* If the definition of this type lives in .debug_types, read that type.
16712 Don't follow DW_AT_specification though, that will take us back up
16713 the chain and we want to go down. */
16714 attr
= die
->attr (DW_AT_signature
);
16715 if (attr
!= nullptr)
16717 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16719 /* The type's CU may not be the same as CU.
16720 Ensure TYPE is recorded with CU in die_type_hash. */
16721 return set_die_type (die
, type
, cu
);
16724 type
= alloc_type (objfile
);
16726 type
->set_code (TYPE_CODE_ENUM
);
16727 name
= dwarf2_full_name (NULL
, die
, cu
);
16729 type
->set_name (name
);
16731 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16734 struct type
*underlying_type
= die_type (die
, cu
);
16736 TYPE_TARGET_TYPE (type
) = underlying_type
;
16739 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16740 if (attr
!= nullptr)
16742 TYPE_LENGTH (type
) = attr
->constant_value (0);
16746 TYPE_LENGTH (type
) = 0;
16749 maybe_set_alignment (cu
, die
, type
);
16751 /* The enumeration DIE can be incomplete. In Ada, any type can be
16752 declared as private in the package spec, and then defined only
16753 inside the package body. Such types are known as Taft Amendment
16754 Types. When another package uses such a type, an incomplete DIE
16755 may be generated by the compiler. */
16756 if (die_is_declaration (die
, cu
))
16757 type
->set_is_stub (true);
16759 /* If this type has an underlying type that is not a stub, then we
16760 may use its attributes. We always use the "unsigned" attribute
16761 in this situation, because ordinarily we guess whether the type
16762 is unsigned -- but the guess can be wrong and the underlying type
16763 can tell us the reality. However, we defer to a local size
16764 attribute if one exists, because this lets the compiler override
16765 the underlying type if needed. */
16766 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_TARGET_TYPE (type
)->is_stub ())
16768 struct type
*underlying_type
= TYPE_TARGET_TYPE (type
);
16769 underlying_type
= check_typedef (underlying_type
);
16771 type
->set_is_unsigned (underlying_type
->is_unsigned ());
16773 if (TYPE_LENGTH (type
) == 0)
16774 TYPE_LENGTH (type
) = TYPE_LENGTH (underlying_type
);
16776 if (TYPE_RAW_ALIGN (type
) == 0
16777 && TYPE_RAW_ALIGN (underlying_type
) != 0)
16778 set_type_align (type
, TYPE_RAW_ALIGN (underlying_type
));
16781 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16783 set_die_type (die
, type
, cu
);
16785 /* Finish the creation of this type by using the enum's children.
16786 Note that, as usual, this must come after set_die_type to avoid
16787 infinite recursion when trying to compute the names of the
16789 update_enumeration_type_from_children (die
, type
, cu
);
16794 /* Given a pointer to a die which begins an enumeration, process all
16795 the dies that define the members of the enumeration, and create the
16796 symbol for the enumeration type.
16798 NOTE: We reverse the order of the element list. */
16801 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16803 struct type
*this_type
;
16805 this_type
= get_die_type (die
, cu
);
16806 if (this_type
== NULL
)
16807 this_type
= read_enumeration_type (die
, cu
);
16809 if (die
->child
!= NULL
)
16811 struct die_info
*child_die
;
16814 child_die
= die
->child
;
16815 while (child_die
&& child_die
->tag
)
16817 if (child_die
->tag
!= DW_TAG_enumerator
)
16819 process_die (child_die
, cu
);
16823 name
= dwarf2_name (child_die
, cu
);
16825 new_symbol (child_die
, this_type
, cu
);
16828 child_die
= child_die
->sibling
;
16832 /* If we are reading an enum from a .debug_types unit, and the enum
16833 is a declaration, and the enum is not the signatured type in the
16834 unit, then we do not want to add a symbol for it. Adding a
16835 symbol would in some cases obscure the true definition of the
16836 enum, giving users an incomplete type when the definition is
16837 actually available. Note that we do not want to do this for all
16838 enums which are just declarations, because C++0x allows forward
16839 enum declarations. */
16840 if (cu
->per_cu
->is_debug_types
16841 && die_is_declaration (die
, cu
))
16843 struct signatured_type
*sig_type
;
16845 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16846 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16847 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16851 new_symbol (die
, this_type
, cu
);
16854 /* Helper function for quirk_ada_thick_pointer that examines a bounds
16855 expression for an index type and finds the corresponding field
16856 offset in the hidden "P_BOUNDS" structure. Returns true on success
16857 and updates *FIELD, false if it fails to recognize an
16861 recognize_bound_expression (struct die_info
*die
, enum dwarf_attribute name
,
16862 int *bounds_offset
, struct field
*field
,
16863 struct dwarf2_cu
*cu
)
16865 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
16866 if (attr
== nullptr || !attr
->form_is_block ())
16869 const struct dwarf_block
*block
= attr
->as_block ();
16870 const gdb_byte
*start
= block
->data
;
16871 const gdb_byte
*end
= block
->data
+ block
->size
;
16873 /* The expression to recognize generally looks like:
16875 (DW_OP_push_object_address; DW_OP_plus_uconst: 8; DW_OP_deref;
16876 DW_OP_plus_uconst: 4; DW_OP_deref_size: 4)
16878 However, the second "plus_uconst" may be missing:
16880 (DW_OP_push_object_address; DW_OP_plus_uconst: 8; DW_OP_deref;
16881 DW_OP_deref_size: 4)
16883 This happens when the field is at the start of the structure.
16885 Also, the final deref may not be sized:
16887 (DW_OP_push_object_address; DW_OP_plus_uconst: 4; DW_OP_deref;
16890 This happens when the size of the index type happens to be the
16891 same as the architecture's word size. This can occur with or
16892 without the second plus_uconst. */
16894 if (end
- start
< 2)
16896 if (*start
++ != DW_OP_push_object_address
)
16898 if (*start
++ != DW_OP_plus_uconst
)
16901 uint64_t this_bound_off
;
16902 start
= gdb_read_uleb128 (start
, end
, &this_bound_off
);
16903 if (start
== nullptr || (int) this_bound_off
!= this_bound_off
)
16905 /* Update *BOUNDS_OFFSET if needed, or alternatively verify that it
16906 is consistent among all bounds. */
16907 if (*bounds_offset
== -1)
16908 *bounds_offset
= this_bound_off
;
16909 else if (*bounds_offset
!= this_bound_off
)
16912 if (start
== end
|| *start
++ != DW_OP_deref
)
16918 else if (*start
== DW_OP_deref_size
|| *start
== DW_OP_deref
)
16920 /* This means an offset of 0. */
16922 else if (*start
++ != DW_OP_plus_uconst
)
16926 /* The size is the parameter to DW_OP_plus_uconst. */
16928 start
= gdb_read_uleb128 (start
, end
, &val
);
16929 if (start
== nullptr)
16931 if ((int) val
!= val
)
16940 if (*start
== DW_OP_deref_size
)
16942 start
= gdb_read_uleb128 (start
+ 1, end
, &size
);
16943 if (start
== nullptr)
16946 else if (*start
== DW_OP_deref
)
16948 size
= cu
->header
.addr_size
;
16954 SET_FIELD_BITPOS (*field
, 8 * offset
);
16955 if (size
!= TYPE_LENGTH (field
->type ()))
16956 FIELD_BITSIZE (*field
) = 8 * size
;
16961 /* With -fgnat-encodings=minimal, gcc will emit some unusual DWARF for
16962 some kinds of Ada arrays:
16964 <1><11db>: Abbrev Number: 7 (DW_TAG_array_type)
16965 <11dc> DW_AT_name : (indirect string, offset: 0x1bb8): string
16966 <11e0> DW_AT_data_location: 2 byte block: 97 6
16967 (DW_OP_push_object_address; DW_OP_deref)
16968 <11e3> DW_AT_type : <0x1173>
16969 <11e7> DW_AT_sibling : <0x1201>
16970 <2><11eb>: Abbrev Number: 8 (DW_TAG_subrange_type)
16971 <11ec> DW_AT_type : <0x1206>
16972 <11f0> DW_AT_lower_bound : 6 byte block: 97 23 8 6 94 4
16973 (DW_OP_push_object_address; DW_OP_plus_uconst: 8; DW_OP_deref;
16974 DW_OP_deref_size: 4)
16975 <11f7> DW_AT_upper_bound : 8 byte block: 97 23 8 6 23 4 94 4
16976 (DW_OP_push_object_address; DW_OP_plus_uconst: 8; DW_OP_deref;
16977 DW_OP_plus_uconst: 4; DW_OP_deref_size: 4)
16979 This actually represents a "thick pointer", which is a structure
16980 with two elements: one that is a pointer to the array data, and one
16981 that is a pointer to another structure; this second structure holds
16984 This returns a new type on success, or nullptr if this didn't
16985 recognize the type. */
16987 static struct type
*
16988 quirk_ada_thick_pointer (struct die_info
*die
, struct dwarf2_cu
*cu
,
16991 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
16992 /* So far we've only seen this with block form. */
16993 if (attr
== nullptr || !attr
->form_is_block ())
16996 /* Note that this will fail if the structure layout is changed by
16997 the compiler. However, we have no good way to recognize some
16998 other layout, because we don't know what expression the compiler
16999 might choose to emit should this happen. */
17000 struct dwarf_block
*blk
= attr
->as_block ();
17002 || blk
->data
[0] != DW_OP_push_object_address
17003 || blk
->data
[1] != DW_OP_deref
)
17006 int bounds_offset
= -1;
17007 int max_align
= -1;
17008 std::vector
<struct field
> range_fields
;
17009 for (struct die_info
*child_die
= die
->child
;
17011 child_die
= child_die
->sibling
)
17013 if (child_die
->tag
== DW_TAG_subrange_type
)
17015 struct type
*underlying
= read_subrange_index_type (child_die
, cu
);
17017 int this_align
= type_align (underlying
);
17018 if (this_align
> max_align
)
17019 max_align
= this_align
;
17021 range_fields
.emplace_back ();
17022 range_fields
.emplace_back ();
17024 struct field
&lower
= range_fields
[range_fields
.size () - 2];
17025 struct field
&upper
= range_fields
[range_fields
.size () - 1];
17027 lower
.set_type (underlying
);
17028 FIELD_ARTIFICIAL (lower
) = 1;
17030 upper
.set_type (underlying
);
17031 FIELD_ARTIFICIAL (upper
) = 1;
17033 if (!recognize_bound_expression (child_die
, DW_AT_lower_bound
,
17034 &bounds_offset
, &lower
, cu
)
17035 || !recognize_bound_expression (child_die
, DW_AT_upper_bound
,
17036 &bounds_offset
, &upper
, cu
))
17041 /* This shouldn't really happen, but double-check that we found
17042 where the bounds are stored. */
17043 if (bounds_offset
== -1)
17046 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17047 for (int i
= 0; i
< range_fields
.size (); i
+= 2)
17051 /* Set the name of each field in the bounds. */
17052 xsnprintf (name
, sizeof (name
), "LB%d", i
/ 2);
17053 FIELD_NAME (range_fields
[i
]) = objfile
->intern (name
);
17054 xsnprintf (name
, sizeof (name
), "UB%d", i
/ 2);
17055 FIELD_NAME (range_fields
[i
+ 1]) = objfile
->intern (name
);
17058 struct type
*bounds
= alloc_type (objfile
);
17059 bounds
->set_code (TYPE_CODE_STRUCT
);
17061 bounds
->set_num_fields (range_fields
.size ());
17063 ((struct field
*) TYPE_ALLOC (bounds
, (bounds
->num_fields ()
17064 * sizeof (struct field
))));
17065 memcpy (bounds
->fields (), range_fields
.data (),
17066 bounds
->num_fields () * sizeof (struct field
));
17068 int last_fieldno
= range_fields
.size () - 1;
17069 int bounds_size
= (TYPE_FIELD_BITPOS (bounds
, last_fieldno
) / 8
17070 + TYPE_LENGTH (bounds
->field (last_fieldno
).type ()));
17071 TYPE_LENGTH (bounds
) = align_up (bounds_size
, max_align
);
17073 /* Rewrite the existing array type in place. Specifically, we
17074 remove any dynamic properties we might have read, and we replace
17075 the index types. */
17076 struct type
*iter
= type
;
17077 for (int i
= 0; i
< range_fields
.size (); i
+= 2)
17079 gdb_assert (iter
->code () == TYPE_CODE_ARRAY
);
17080 iter
->main_type
->dyn_prop_list
= nullptr;
17081 iter
->set_index_type
17082 (create_static_range_type (NULL
, bounds
->field (i
).type (), 1, 0));
17083 iter
= TYPE_TARGET_TYPE (iter
);
17086 struct type
*result
= alloc_type (objfile
);
17087 result
->set_code (TYPE_CODE_STRUCT
);
17089 result
->set_num_fields (2);
17091 ((struct field
*) TYPE_ZALLOC (result
, (result
->num_fields ()
17092 * sizeof (struct field
))));
17094 /* The names are chosen to coincide with what the compiler does with
17095 -fgnat-encodings=all, which the Ada code in gdb already
17097 TYPE_FIELD_NAME (result
, 0) = "P_ARRAY";
17098 result
->field (0).set_type (lookup_pointer_type (type
));
17100 TYPE_FIELD_NAME (result
, 1) = "P_BOUNDS";
17101 result
->field (1).set_type (lookup_pointer_type (bounds
));
17102 SET_FIELD_BITPOS (result
->field (1), 8 * bounds_offset
);
17104 result
->set_name (type
->name ());
17105 TYPE_LENGTH (result
) = (TYPE_LENGTH (result
->field (0).type ())
17106 + TYPE_LENGTH (result
->field (1).type ()));
17111 /* Extract all information from a DW_TAG_array_type DIE and put it in
17112 the DIE's type field. For now, this only handles one dimensional
17115 static struct type
*
17116 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17118 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17119 struct die_info
*child_die
;
17121 struct type
*element_type
, *range_type
, *index_type
;
17122 struct attribute
*attr
;
17124 struct dynamic_prop
*byte_stride_prop
= NULL
;
17125 unsigned int bit_stride
= 0;
17127 element_type
= die_type (die
, cu
);
17129 /* The die_type call above may have already set the type for this DIE. */
17130 type
= get_die_type (die
, cu
);
17134 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
17138 struct type
*prop_type
= cu
->addr_sized_int_type (false);
17141 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
17142 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
,
17146 complaint (_("unable to read array DW_AT_byte_stride "
17147 " - DIE at %s [in module %s]"),
17148 sect_offset_str (die
->sect_off
),
17149 objfile_name (cu
->per_objfile
->objfile
));
17150 /* Ignore this attribute. We will likely not be able to print
17151 arrays of this type correctly, but there is little we can do
17152 to help if we cannot read the attribute's value. */
17153 byte_stride_prop
= NULL
;
17157 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
17159 bit_stride
= attr
->constant_value (0);
17161 /* Irix 6.2 native cc creates array types without children for
17162 arrays with unspecified length. */
17163 if (die
->child
== NULL
)
17165 index_type
= objfile_type (objfile
)->builtin_int
;
17166 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
17167 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
17168 byte_stride_prop
, bit_stride
);
17169 return set_die_type (die
, type
, cu
);
17172 std::vector
<struct type
*> range_types
;
17173 child_die
= die
->child
;
17174 while (child_die
&& child_die
->tag
)
17176 if (child_die
->tag
== DW_TAG_subrange_type
)
17178 struct type
*child_type
= read_type_die (child_die
, cu
);
17180 if (child_type
!= NULL
)
17182 /* The range type was succesfully read. Save it for the
17183 array type creation. */
17184 range_types
.push_back (child_type
);
17187 child_die
= child_die
->sibling
;
17190 /* Dwarf2 dimensions are output from left to right, create the
17191 necessary array types in backwards order. */
17193 type
= element_type
;
17195 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
17199 while (i
< range_types
.size ())
17201 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
17202 byte_stride_prop
, bit_stride
);
17204 byte_stride_prop
= nullptr;
17209 size_t ndim
= range_types
.size ();
17212 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
17213 byte_stride_prop
, bit_stride
);
17215 byte_stride_prop
= nullptr;
17219 /* Understand Dwarf2 support for vector types (like they occur on
17220 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
17221 array type. This is not part of the Dwarf2/3 standard yet, but a
17222 custom vendor extension. The main difference between a regular
17223 array and the vector variant is that vectors are passed by value
17225 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
17226 if (attr
!= nullptr)
17227 make_vector_type (type
);
17229 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
17230 implementation may choose to implement triple vectors using this
17232 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17233 if (attr
!= nullptr && attr
->form_is_unsigned ())
17235 if (attr
->as_unsigned () >= TYPE_LENGTH (type
))
17236 TYPE_LENGTH (type
) = attr
->as_unsigned ();
17238 complaint (_("DW_AT_byte_size for array type smaller "
17239 "than the total size of elements"));
17242 name
= dwarf2_name (die
, cu
);
17244 type
->set_name (name
);
17246 maybe_set_alignment (cu
, die
, type
);
17248 struct type
*replacement_type
= nullptr;
17249 if (cu
->language
== language_ada
)
17251 replacement_type
= quirk_ada_thick_pointer (die
, cu
, type
);
17252 if (replacement_type
!= nullptr)
17253 type
= replacement_type
;
17256 /* Install the type in the die. */
17257 set_die_type (die
, type
, cu
, replacement_type
!= nullptr);
17259 /* set_die_type should be already done. */
17260 set_descriptive_type (type
, die
, cu
);
17265 static enum dwarf_array_dim_ordering
17266 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
17268 struct attribute
*attr
;
17270 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
17272 if (attr
!= nullptr)
17274 LONGEST val
= attr
->constant_value (-1);
17275 if (val
== DW_ORD_row_major
|| val
== DW_ORD_col_major
)
17276 return (enum dwarf_array_dim_ordering
) val
;
17279 /* GNU F77 is a special case, as at 08/2004 array type info is the
17280 opposite order to the dwarf2 specification, but data is still
17281 laid out as per normal fortran.
17283 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
17284 version checking. */
17286 if (cu
->language
== language_fortran
17287 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
17289 return DW_ORD_row_major
;
17292 switch (cu
->language_defn
->array_ordering ())
17294 case array_column_major
:
17295 return DW_ORD_col_major
;
17296 case array_row_major
:
17298 return DW_ORD_row_major
;
17302 /* Extract all information from a DW_TAG_set_type DIE and put it in
17303 the DIE's type field. */
17305 static struct type
*
17306 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17308 struct type
*domain_type
, *set_type
;
17309 struct attribute
*attr
;
17311 domain_type
= die_type (die
, cu
);
17313 /* The die_type call above may have already set the type for this DIE. */
17314 set_type
= get_die_type (die
, cu
);
17318 set_type
= create_set_type (NULL
, domain_type
);
17320 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17321 if (attr
!= nullptr && attr
->form_is_unsigned ())
17322 TYPE_LENGTH (set_type
) = attr
->as_unsigned ();
17324 maybe_set_alignment (cu
, die
, set_type
);
17326 return set_die_type (die
, set_type
, cu
);
17329 /* A helper for read_common_block that creates a locexpr baton.
17330 SYM is the symbol which we are marking as computed.
17331 COMMON_DIE is the DIE for the common block.
17332 COMMON_LOC is the location expression attribute for the common
17334 MEMBER_LOC is the location expression attribute for the particular
17335 member of the common block that we are processing.
17336 CU is the CU from which the above come. */
17339 mark_common_block_symbol_computed (struct symbol
*sym
,
17340 struct die_info
*common_die
,
17341 struct attribute
*common_loc
,
17342 struct attribute
*member_loc
,
17343 struct dwarf2_cu
*cu
)
17345 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
17346 struct objfile
*objfile
= per_objfile
->objfile
;
17347 struct dwarf2_locexpr_baton
*baton
;
17349 unsigned int cu_off
;
17350 enum bfd_endian byte_order
= gdbarch_byte_order (objfile
->arch ());
17351 LONGEST offset
= 0;
17353 gdb_assert (common_loc
&& member_loc
);
17354 gdb_assert (common_loc
->form_is_block ());
17355 gdb_assert (member_loc
->form_is_block ()
17356 || member_loc
->form_is_constant ());
17358 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
17359 baton
->per_objfile
= per_objfile
;
17360 baton
->per_cu
= cu
->per_cu
;
17361 gdb_assert (baton
->per_cu
);
17363 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
17365 if (member_loc
->form_is_constant ())
17367 offset
= member_loc
->constant_value (0);
17368 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
17371 baton
->size
+= member_loc
->as_block ()->size
;
17373 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
17376 *ptr
++ = DW_OP_call4
;
17377 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
17378 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
17381 if (member_loc
->form_is_constant ())
17383 *ptr
++ = DW_OP_addr
;
17384 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
17385 ptr
+= cu
->header
.addr_size
;
17389 /* We have to copy the data here, because DW_OP_call4 will only
17390 use a DW_AT_location attribute. */
17391 struct dwarf_block
*block
= member_loc
->as_block ();
17392 memcpy (ptr
, block
->data
, block
->size
);
17393 ptr
+= block
->size
;
17396 *ptr
++ = DW_OP_plus
;
17397 gdb_assert (ptr
- baton
->data
== baton
->size
);
17399 SYMBOL_LOCATION_BATON (sym
) = baton
;
17400 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
17403 /* Create appropriate locally-scoped variables for all the
17404 DW_TAG_common_block entries. Also create a struct common_block
17405 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
17406 is used to separate the common blocks name namespace from regular
17410 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
17412 struct attribute
*attr
;
17414 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
17415 if (attr
!= nullptr)
17417 /* Support the .debug_loc offsets. */
17418 if (attr
->form_is_block ())
17422 else if (attr
->form_is_section_offset ())
17424 dwarf2_complex_location_expr_complaint ();
17429 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17430 "common block member");
17435 if (die
->child
!= NULL
)
17437 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17438 struct die_info
*child_die
;
17439 size_t n_entries
= 0, size
;
17440 struct common_block
*common_block
;
17441 struct symbol
*sym
;
17443 for (child_die
= die
->child
;
17444 child_die
&& child_die
->tag
;
17445 child_die
= child_die
->sibling
)
17448 size
= (sizeof (struct common_block
)
17449 + (n_entries
- 1) * sizeof (struct symbol
*));
17451 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
17453 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
17454 common_block
->n_entries
= 0;
17456 for (child_die
= die
->child
;
17457 child_die
&& child_die
->tag
;
17458 child_die
= child_die
->sibling
)
17460 /* Create the symbol in the DW_TAG_common_block block in the current
17462 sym
= new_symbol (child_die
, NULL
, cu
);
17465 struct attribute
*member_loc
;
17467 common_block
->contents
[common_block
->n_entries
++] = sym
;
17469 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
17473 /* GDB has handled this for a long time, but it is
17474 not specified by DWARF. It seems to have been
17475 emitted by gfortran at least as recently as:
17476 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
17477 complaint (_("Variable in common block has "
17478 "DW_AT_data_member_location "
17479 "- DIE at %s [in module %s]"),
17480 sect_offset_str (child_die
->sect_off
),
17481 objfile_name (objfile
));
17483 if (member_loc
->form_is_section_offset ())
17484 dwarf2_complex_location_expr_complaint ();
17485 else if (member_loc
->form_is_constant ()
17486 || member_loc
->form_is_block ())
17488 if (attr
!= nullptr)
17489 mark_common_block_symbol_computed (sym
, die
, attr
,
17493 dwarf2_complex_location_expr_complaint ();
17498 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
17499 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
17503 /* Create a type for a C++ namespace. */
17505 static struct type
*
17506 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17508 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17509 const char *previous_prefix
, *name
;
17513 /* For extensions, reuse the type of the original namespace. */
17514 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
17516 struct die_info
*ext_die
;
17517 struct dwarf2_cu
*ext_cu
= cu
;
17519 ext_die
= dwarf2_extension (die
, &ext_cu
);
17520 type
= read_type_die (ext_die
, ext_cu
);
17522 /* EXT_CU may not be the same as CU.
17523 Ensure TYPE is recorded with CU in die_type_hash. */
17524 return set_die_type (die
, type
, cu
);
17527 name
= namespace_name (die
, &is_anonymous
, cu
);
17529 /* Now build the name of the current namespace. */
17531 previous_prefix
= determine_prefix (die
, cu
);
17532 if (previous_prefix
[0] != '\0')
17533 name
= typename_concat (&objfile
->objfile_obstack
,
17534 previous_prefix
, name
, 0, cu
);
17536 /* Create the type. */
17537 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
17539 return set_die_type (die
, type
, cu
);
17542 /* Read a namespace scope. */
17545 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
17547 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17550 /* Add a symbol associated to this if we haven't seen the namespace
17551 before. Also, add a using directive if it's an anonymous
17554 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
17558 type
= read_type_die (die
, cu
);
17559 new_symbol (die
, type
, cu
);
17561 namespace_name (die
, &is_anonymous
, cu
);
17564 const char *previous_prefix
= determine_prefix (die
, cu
);
17566 std::vector
<const char *> excludes
;
17567 add_using_directive (using_directives (cu
),
17568 previous_prefix
, type
->name (), NULL
,
17569 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
17573 if (die
->child
!= NULL
)
17575 struct die_info
*child_die
= die
->child
;
17577 while (child_die
&& child_die
->tag
)
17579 process_die (child_die
, cu
);
17580 child_die
= child_die
->sibling
;
17585 /* Read a Fortran module as type. This DIE can be only a declaration used for
17586 imported module. Still we need that type as local Fortran "use ... only"
17587 declaration imports depend on the created type in determine_prefix. */
17589 static struct type
*
17590 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17592 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17593 const char *module_name
;
17596 module_name
= dwarf2_name (die
, cu
);
17597 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
17599 return set_die_type (die
, type
, cu
);
17602 /* Read a Fortran module. */
17605 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
17607 struct die_info
*child_die
= die
->child
;
17610 type
= read_type_die (die
, cu
);
17611 new_symbol (die
, type
, cu
);
17613 while (child_die
&& child_die
->tag
)
17615 process_die (child_die
, cu
);
17616 child_die
= child_die
->sibling
;
17620 /* Return the name of the namespace represented by DIE. Set
17621 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
17624 static const char *
17625 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
17627 struct die_info
*current_die
;
17628 const char *name
= NULL
;
17630 /* Loop through the extensions until we find a name. */
17632 for (current_die
= die
;
17633 current_die
!= NULL
;
17634 current_die
= dwarf2_extension (die
, &cu
))
17636 /* We don't use dwarf2_name here so that we can detect the absence
17637 of a name -> anonymous namespace. */
17638 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
17644 /* Is it an anonymous namespace? */
17646 *is_anonymous
= (name
== NULL
);
17648 name
= CP_ANONYMOUS_NAMESPACE_STR
;
17653 /* Extract all information from a DW_TAG_pointer_type DIE and add to
17654 the user defined type vector. */
17656 static struct type
*
17657 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17659 struct gdbarch
*gdbarch
= cu
->per_objfile
->objfile
->arch ();
17660 struct comp_unit_head
*cu_header
= &cu
->header
;
17662 struct attribute
*attr_byte_size
;
17663 struct attribute
*attr_address_class
;
17664 int byte_size
, addr_class
;
17665 struct type
*target_type
;
17667 target_type
= die_type (die
, cu
);
17669 /* The die_type call above may have already set the type for this DIE. */
17670 type
= get_die_type (die
, cu
);
17674 type
= lookup_pointer_type (target_type
);
17676 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17677 if (attr_byte_size
)
17678 byte_size
= attr_byte_size
->constant_value (cu_header
->addr_size
);
17680 byte_size
= cu_header
->addr_size
;
17682 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
17683 if (attr_address_class
)
17684 addr_class
= attr_address_class
->constant_value (DW_ADDR_none
);
17686 addr_class
= DW_ADDR_none
;
17688 ULONGEST alignment
= get_alignment (cu
, die
);
17690 /* If the pointer size, alignment, or address class is different
17691 than the default, create a type variant marked as such and set
17692 the length accordingly. */
17693 if (TYPE_LENGTH (type
) != byte_size
17694 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
17695 && alignment
!= TYPE_RAW_ALIGN (type
))
17696 || addr_class
!= DW_ADDR_none
)
17698 if (gdbarch_address_class_type_flags_p (gdbarch
))
17700 type_instance_flags type_flags
17701 = gdbarch_address_class_type_flags (gdbarch
, byte_size
,
17703 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
17705 type
= make_type_with_address_space (type
, type_flags
);
17707 else if (TYPE_LENGTH (type
) != byte_size
)
17709 complaint (_("invalid pointer size %d"), byte_size
);
17711 else if (TYPE_RAW_ALIGN (type
) != alignment
)
17713 complaint (_("Invalid DW_AT_alignment"
17714 " - DIE at %s [in module %s]"),
17715 sect_offset_str (die
->sect_off
),
17716 objfile_name (cu
->per_objfile
->objfile
));
17720 /* Should we also complain about unhandled address classes? */
17724 TYPE_LENGTH (type
) = byte_size
;
17725 set_type_align (type
, alignment
);
17726 return set_die_type (die
, type
, cu
);
17729 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
17730 the user defined type vector. */
17732 static struct type
*
17733 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17736 struct type
*to_type
;
17737 struct type
*domain
;
17739 to_type
= die_type (die
, cu
);
17740 domain
= die_containing_type (die
, cu
);
17742 /* The calls above may have already set the type for this DIE. */
17743 type
= get_die_type (die
, cu
);
17747 if (check_typedef (to_type
)->code () == TYPE_CODE_METHOD
)
17748 type
= lookup_methodptr_type (to_type
);
17749 else if (check_typedef (to_type
)->code () == TYPE_CODE_FUNC
)
17751 struct type
*new_type
= alloc_type (cu
->per_objfile
->objfile
);
17753 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
17754 to_type
->fields (), to_type
->num_fields (),
17755 to_type
->has_varargs ());
17756 type
= lookup_methodptr_type (new_type
);
17759 type
= lookup_memberptr_type (to_type
, domain
);
17761 return set_die_type (die
, type
, cu
);
17764 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
17765 the user defined type vector. */
17767 static struct type
*
17768 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17769 enum type_code refcode
)
17771 struct comp_unit_head
*cu_header
= &cu
->header
;
17772 struct type
*type
, *target_type
;
17773 struct attribute
*attr
;
17775 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
17777 target_type
= die_type (die
, cu
);
17779 /* The die_type call above may have already set the type for this DIE. */
17780 type
= get_die_type (die
, cu
);
17784 type
= lookup_reference_type (target_type
, refcode
);
17785 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17786 if (attr
!= nullptr)
17788 TYPE_LENGTH (type
) = attr
->constant_value (cu_header
->addr_size
);
17792 TYPE_LENGTH (type
) = cu_header
->addr_size
;
17794 maybe_set_alignment (cu
, die
, type
);
17795 return set_die_type (die
, type
, cu
);
17798 /* Add the given cv-qualifiers to the element type of the array. GCC
17799 outputs DWARF type qualifiers that apply to an array, not the
17800 element type. But GDB relies on the array element type to carry
17801 the cv-qualifiers. This mimics section 6.7.3 of the C99
17804 static struct type
*
17805 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17806 struct type
*base_type
, int cnst
, int voltl
)
17808 struct type
*el_type
, *inner_array
;
17810 base_type
= copy_type (base_type
);
17811 inner_array
= base_type
;
17813 while (TYPE_TARGET_TYPE (inner_array
)->code () == TYPE_CODE_ARRAY
)
17815 TYPE_TARGET_TYPE (inner_array
) =
17816 copy_type (TYPE_TARGET_TYPE (inner_array
));
17817 inner_array
= TYPE_TARGET_TYPE (inner_array
);
17820 el_type
= TYPE_TARGET_TYPE (inner_array
);
17821 cnst
|= TYPE_CONST (el_type
);
17822 voltl
|= TYPE_VOLATILE (el_type
);
17823 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
17825 return set_die_type (die
, base_type
, cu
);
17828 static struct type
*
17829 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17831 struct type
*base_type
, *cv_type
;
17833 base_type
= die_type (die
, cu
);
17835 /* The die_type call above may have already set the type for this DIE. */
17836 cv_type
= get_die_type (die
, cu
);
17840 /* In case the const qualifier is applied to an array type, the element type
17841 is so qualified, not the array type (section 6.7.3 of C99). */
17842 if (base_type
->code () == TYPE_CODE_ARRAY
)
17843 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
17845 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
17846 return set_die_type (die
, cv_type
, cu
);
17849 static struct type
*
17850 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17852 struct type
*base_type
, *cv_type
;
17854 base_type
= die_type (die
, cu
);
17856 /* The die_type call above may have already set the type for this DIE. */
17857 cv_type
= get_die_type (die
, cu
);
17861 /* In case the volatile qualifier is applied to an array type, the
17862 element type is so qualified, not the array type (section 6.7.3
17864 if (base_type
->code () == TYPE_CODE_ARRAY
)
17865 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
17867 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
17868 return set_die_type (die
, cv_type
, cu
);
17871 /* Handle DW_TAG_restrict_type. */
17873 static struct type
*
17874 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17876 struct type
*base_type
, *cv_type
;
17878 base_type
= die_type (die
, cu
);
17880 /* The die_type call above may have already set the type for this DIE. */
17881 cv_type
= get_die_type (die
, cu
);
17885 cv_type
= make_restrict_type (base_type
);
17886 return set_die_type (die
, cv_type
, cu
);
17889 /* Handle DW_TAG_atomic_type. */
17891 static struct type
*
17892 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17894 struct type
*base_type
, *cv_type
;
17896 base_type
= die_type (die
, cu
);
17898 /* The die_type call above may have already set the type for this DIE. */
17899 cv_type
= get_die_type (die
, cu
);
17903 cv_type
= make_atomic_type (base_type
);
17904 return set_die_type (die
, cv_type
, cu
);
17907 /* Extract all information from a DW_TAG_string_type DIE and add to
17908 the user defined type vector. It isn't really a user defined type,
17909 but it behaves like one, with other DIE's using an AT_user_def_type
17910 attribute to reference it. */
17912 static struct type
*
17913 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17915 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17916 struct gdbarch
*gdbarch
= objfile
->arch ();
17917 struct type
*type
, *range_type
, *index_type
, *char_type
;
17918 struct attribute
*attr
;
17919 struct dynamic_prop prop
;
17920 bool length_is_constant
= true;
17923 /* There are a couple of places where bit sizes might be made use of
17924 when parsing a DW_TAG_string_type, however, no producer that we know
17925 of make use of these. Handling bit sizes that are a multiple of the
17926 byte size is easy enough, but what about other bit sizes? Lets deal
17927 with that problem when we have to. Warn about these attributes being
17928 unsupported, then parse the type and ignore them like we always
17930 if (dwarf2_attr (die
, DW_AT_bit_size
, cu
) != nullptr
17931 || dwarf2_attr (die
, DW_AT_string_length_bit_size
, cu
) != nullptr)
17933 static bool warning_printed
= false;
17934 if (!warning_printed
)
17936 warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not "
17937 "currently supported on DW_TAG_string_type."));
17938 warning_printed
= true;
17942 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
17943 if (attr
!= nullptr && !attr
->form_is_constant ())
17945 /* The string length describes the location at which the length of
17946 the string can be found. The size of the length field can be
17947 specified with one of the attributes below. */
17948 struct type
*prop_type
;
17949 struct attribute
*len
17950 = dwarf2_attr (die
, DW_AT_string_length_byte_size
, cu
);
17951 if (len
== nullptr)
17952 len
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17953 if (len
!= nullptr && len
->form_is_constant ())
17955 /* Pass 0 as the default as we know this attribute is constant
17956 and the default value will not be returned. */
17957 LONGEST sz
= len
->constant_value (0);
17958 prop_type
= cu
->per_objfile
->int_type (sz
, true);
17962 /* If the size is not specified then we assume it is the size of
17963 an address on this target. */
17964 prop_type
= cu
->addr_sized_int_type (true);
17967 /* Convert the attribute into a dynamic property. */
17968 if (!attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
17971 length_is_constant
= false;
17973 else if (attr
!= nullptr)
17975 /* This DW_AT_string_length just contains the length with no
17976 indirection. There's no need to create a dynamic property in this
17977 case. Pass 0 for the default value as we know it will not be
17978 returned in this case. */
17979 length
= attr
->constant_value (0);
17981 else if ((attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
)) != nullptr)
17983 /* We don't currently support non-constant byte sizes for strings. */
17984 length
= attr
->constant_value (1);
17988 /* Use 1 as a fallback length if we have nothing else. */
17992 index_type
= objfile_type (objfile
)->builtin_int
;
17993 if (length_is_constant
)
17994 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17997 struct dynamic_prop low_bound
;
17999 low_bound
.set_const_val (1);
18000 range_type
= create_range_type (NULL
, index_type
, &low_bound
, &prop
, 0);
18002 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
18003 type
= create_string_type (NULL
, char_type
, range_type
);
18005 return set_die_type (die
, type
, cu
);
18008 /* Assuming that DIE corresponds to a function, returns nonzero
18009 if the function is prototyped. */
18012 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
18014 struct attribute
*attr
;
18016 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
18017 if (attr
&& attr
->as_boolean ())
18020 /* The DWARF standard implies that the DW_AT_prototyped attribute
18021 is only meaningful for C, but the concept also extends to other
18022 languages that allow unprototyped functions (Eg: Objective C).
18023 For all other languages, assume that functions are always
18025 if (cu
->language
!= language_c
18026 && cu
->language
!= language_objc
18027 && cu
->language
!= language_opencl
)
18030 /* RealView does not emit DW_AT_prototyped. We can not distinguish
18031 prototyped and unprototyped functions; default to prototyped,
18032 since that is more common in modern code (and RealView warns
18033 about unprototyped functions). */
18034 if (producer_is_realview (cu
->producer
))
18040 /* Handle DIES due to C code like:
18044 int (*funcp)(int a, long l);
18048 ('funcp' generates a DW_TAG_subroutine_type DIE). */
18050 static struct type
*
18051 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18053 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
18054 struct type
*type
; /* Type that this function returns. */
18055 struct type
*ftype
; /* Function that returns above type. */
18056 struct attribute
*attr
;
18058 type
= die_type (die
, cu
);
18060 /* The die_type call above may have already set the type for this DIE. */
18061 ftype
= get_die_type (die
, cu
);
18065 ftype
= lookup_function_type (type
);
18067 if (prototyped_function_p (die
, cu
))
18068 ftype
->set_is_prototyped (true);
18070 /* Store the calling convention in the type if it's available in
18071 the subroutine die. Otherwise set the calling convention to
18072 the default value DW_CC_normal. */
18073 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
18074 if (attr
!= nullptr
18075 && is_valid_DW_AT_calling_convention_for_subroutine (attr
->constant_value (0)))
18076 TYPE_CALLING_CONVENTION (ftype
)
18077 = (enum dwarf_calling_convention
) attr
->constant_value (0);
18078 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
18079 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
18081 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
18083 /* Record whether the function returns normally to its caller or not
18084 if the DWARF producer set that information. */
18085 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
18086 if (attr
&& attr
->as_boolean ())
18087 TYPE_NO_RETURN (ftype
) = 1;
18089 /* We need to add the subroutine type to the die immediately so
18090 we don't infinitely recurse when dealing with parameters
18091 declared as the same subroutine type. */
18092 set_die_type (die
, ftype
, cu
);
18094 if (die
->child
!= NULL
)
18096 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
18097 struct die_info
*child_die
;
18098 int nparams
, iparams
;
18100 /* Count the number of parameters.
18101 FIXME: GDB currently ignores vararg functions, but knows about
18102 vararg member functions. */
18104 child_die
= die
->child
;
18105 while (child_die
&& child_die
->tag
)
18107 if (child_die
->tag
== DW_TAG_formal_parameter
)
18109 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
18110 ftype
->set_has_varargs (true);
18112 child_die
= child_die
->sibling
;
18115 /* Allocate storage for parameters and fill them in. */
18116 ftype
->set_num_fields (nparams
);
18118 ((struct field
*) TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
)));
18120 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
18121 even if we error out during the parameters reading below. */
18122 for (iparams
= 0; iparams
< nparams
; iparams
++)
18123 ftype
->field (iparams
).set_type (void_type
);
18126 child_die
= die
->child
;
18127 while (child_die
&& child_die
->tag
)
18129 if (child_die
->tag
== DW_TAG_formal_parameter
)
18131 struct type
*arg_type
;
18133 /* DWARF version 2 has no clean way to discern C++
18134 static and non-static member functions. G++ helps
18135 GDB by marking the first parameter for non-static
18136 member functions (which is the this pointer) as
18137 artificial. We pass this information to
18138 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
18140 DWARF version 3 added DW_AT_object_pointer, which GCC
18141 4.5 does not yet generate. */
18142 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
18143 if (attr
!= nullptr)
18144 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = attr
->as_boolean ();
18146 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
18147 arg_type
= die_type (child_die
, cu
);
18149 /* RealView does not mark THIS as const, which the testsuite
18150 expects. GCC marks THIS as const in method definitions,
18151 but not in the class specifications (GCC PR 43053). */
18152 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
18153 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
18156 struct dwarf2_cu
*arg_cu
= cu
;
18157 const char *name
= dwarf2_name (child_die
, cu
);
18159 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
18160 if (attr
!= nullptr)
18162 /* If the compiler emits this, use it. */
18163 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
18166 else if (name
&& strcmp (name
, "this") == 0)
18167 /* Function definitions will have the argument names. */
18169 else if (name
== NULL
&& iparams
== 0)
18170 /* Declarations may not have the names, so like
18171 elsewhere in GDB, assume an artificial first
18172 argument is "this". */
18176 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
18180 ftype
->field (iparams
).set_type (arg_type
);
18183 child_die
= child_die
->sibling
;
18190 static struct type
*
18191 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
18193 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
18194 const char *name
= NULL
;
18195 struct type
*this_type
, *target_type
;
18197 name
= dwarf2_full_name (NULL
, die
, cu
);
18198 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
18199 this_type
->set_target_is_stub (true);
18200 set_die_type (die
, this_type
, cu
);
18201 target_type
= die_type (die
, cu
);
18202 if (target_type
!= this_type
)
18203 TYPE_TARGET_TYPE (this_type
) = target_type
;
18206 /* Self-referential typedefs are, it seems, not allowed by the DWARF
18207 spec and cause infinite loops in GDB. */
18208 complaint (_("Self-referential DW_TAG_typedef "
18209 "- DIE at %s [in module %s]"),
18210 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
18211 TYPE_TARGET_TYPE (this_type
) = NULL
;
18215 /* Gcc-7 and before supports -feliminate-dwarf2-dups, which generates
18216 anonymous typedefs, which is, strictly speaking, invalid DWARF.
18217 Handle these by just returning the target type, rather than
18218 constructing an anonymous typedef type and trying to handle this
18220 set_die_type (die
, target_type
, cu
);
18221 return target_type
;
18226 /* Assuming DIE is a rational DW_TAG_constant, read the DIE's
18227 numerator and denominator into NUMERATOR and DENOMINATOR (resp).
18229 If the numerator and/or numerator attribute is missing,
18230 a complaint is filed, and NUMERATOR and DENOMINATOR are left
18234 get_dwarf2_rational_constant (struct die_info
*die
, struct dwarf2_cu
*cu
,
18235 gdb_mpz
*numerator
, gdb_mpz
*denominator
)
18237 struct attribute
*num_attr
, *denom_attr
;
18239 num_attr
= dwarf2_attr (die
, DW_AT_GNU_numerator
, cu
);
18240 if (num_attr
== nullptr)
18241 complaint (_("DW_AT_GNU_numerator missing in %s DIE at %s"),
18242 dwarf_tag_name (die
->tag
), sect_offset_str (die
->sect_off
));
18244 denom_attr
= dwarf2_attr (die
, DW_AT_GNU_denominator
, cu
);
18245 if (denom_attr
== nullptr)
18246 complaint (_("DW_AT_GNU_denominator missing in %s DIE at %s"),
18247 dwarf_tag_name (die
->tag
), sect_offset_str (die
->sect_off
));
18249 if (num_attr
== nullptr || denom_attr
== nullptr)
18252 if (num_attr
->form_is_block ())
18254 dwarf_block
*blk
= num_attr
->as_block ();
18255 mpz_import (numerator
->val
, blk
->size
,
18256 bfd_big_endian (cu
->per_objfile
->objfile
->obfd
) ? 1 : -1,
18257 1, 0, 0, blk
->data
);
18260 *numerator
= gdb_mpz (num_attr
->constant_value (1));
18262 if (denom_attr
->form_is_block ())
18264 dwarf_block
*blk
= denom_attr
->as_block ();
18265 mpz_import (denominator
->val
, blk
->size
,
18266 bfd_big_endian (cu
->per_objfile
->objfile
->obfd
) ? 1 : -1,
18267 1, 0, 0, blk
->data
);
18270 *denominator
= gdb_mpz (denom_attr
->constant_value (1));
18273 /* Same as get_dwarf2_rational_constant, but extracting an unsigned
18274 rational constant, rather than a signed one.
18276 If the rational constant has a negative value, a complaint
18277 is filed, and NUMERATOR and DENOMINATOR are left untouched. */
18280 get_dwarf2_unsigned_rational_constant (struct die_info
*die
,
18281 struct dwarf2_cu
*cu
,
18282 gdb_mpz
*numerator
,
18283 gdb_mpz
*denominator
)
18288 get_dwarf2_rational_constant (die
, cu
, &num
, &denom
);
18289 if (mpz_sgn (num
.val
) == -1 && mpz_sgn (denom
.val
) == -1)
18291 mpz_neg (num
.val
, num
.val
);
18292 mpz_neg (denom
.val
, denom
.val
);
18294 else if (mpz_sgn (num
.val
) == -1)
18296 complaint (_("unexpected negative value for DW_AT_GNU_numerator"
18298 sect_offset_str (die
->sect_off
));
18301 else if (mpz_sgn (denom
.val
) == -1)
18303 complaint (_("unexpected negative value for DW_AT_GNU_denominator"
18305 sect_offset_str (die
->sect_off
));
18309 *numerator
= std::move (num
);
18310 *denominator
= std::move (denom
);
18313 /* Assuming DIE corresponds to a fixed point type, finish the creation
18314 of the corresponding TYPE by setting its type-specific data.
18315 CU is the DIE's CU. */
18318 finish_fixed_point_type (struct type
*type
, struct die_info
*die
,
18319 struct dwarf2_cu
*cu
)
18321 struct attribute
*attr
;
18323 gdb_assert (type
->code () == TYPE_CODE_FIXED_POINT
18324 && TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_FIXED_POINT
);
18326 attr
= dwarf2_attr (die
, DW_AT_binary_scale
, cu
);
18328 attr
= dwarf2_attr (die
, DW_AT_decimal_scale
, cu
);
18330 attr
= dwarf2_attr (die
, DW_AT_small
, cu
);
18332 /* Numerator and denominator of our fixed-point type's scaling factor.
18333 The default is a scaling factor of 1, which we use as a fallback
18334 when we are not able to decode it (problem with the debugging info,
18335 unsupported forms, bug in GDB, etc...). Using that as the default
18336 allows us to at least print the unscaled value, which might still
18337 be useful to a user. */
18338 gdb_mpz
scale_num (1);
18339 gdb_mpz
scale_denom (1);
18341 if (attr
== nullptr)
18343 /* Scaling factor not found. Assume a scaling factor of 1,
18344 and hope for the best. At least the user will be able to see
18345 the encoded value. */
18346 complaint (_("no scale found for fixed-point type (DIE at %s)"),
18347 sect_offset_str (die
->sect_off
));
18349 else if (attr
->name
== DW_AT_binary_scale
)
18351 LONGEST scale_exp
= attr
->constant_value (0);
18352 gdb_mpz
*num_or_denom
= scale_exp
> 0 ? &scale_num
: &scale_denom
;
18354 mpz_mul_2exp (num_or_denom
->val
, num_or_denom
->val
, std::abs (scale_exp
));
18356 else if (attr
->name
== DW_AT_decimal_scale
)
18358 LONGEST scale_exp
= attr
->constant_value (0);
18359 gdb_mpz
*num_or_denom
= scale_exp
> 0 ? &scale_num
: &scale_denom
;
18361 mpz_ui_pow_ui (num_or_denom
->val
, 10, std::abs (scale_exp
));
18363 else if (attr
->name
== DW_AT_small
)
18365 struct die_info
*scale_die
;
18366 struct dwarf2_cu
*scale_cu
= cu
;
18368 scale_die
= follow_die_ref (die
, attr
, &scale_cu
);
18369 if (scale_die
->tag
== DW_TAG_constant
)
18370 get_dwarf2_unsigned_rational_constant (scale_die
, scale_cu
,
18371 &scale_num
, &scale_denom
);
18373 complaint (_("%s DIE not supported as target of DW_AT_small attribute"
18375 dwarf_tag_name (die
->tag
), sect_offset_str (die
->sect_off
));
18379 complaint (_("unsupported scale attribute %s for fixed-point type"
18381 dwarf_attr_name (attr
->name
),
18382 sect_offset_str (die
->sect_off
));
18385 gdb_mpq
&scaling_factor
= type
->fixed_point_info ().scaling_factor
;
18386 mpz_set (mpq_numref (scaling_factor
.val
), scale_num
.val
);
18387 mpz_set (mpq_denref (scaling_factor
.val
), scale_denom
.val
);
18388 mpq_canonicalize (scaling_factor
.val
);
18391 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
18392 (which may be different from NAME) to the architecture back-end to allow
18393 it to guess the correct format if necessary. */
18395 static struct type
*
18396 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
18397 const char *name_hint
, enum bfd_endian byte_order
)
18399 struct gdbarch
*gdbarch
= objfile
->arch ();
18400 const struct floatformat
**format
;
18403 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
18405 type
= init_float_type (objfile
, bits
, name
, format
, byte_order
);
18407 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
18412 /* Allocate an integer type of size BITS and name NAME. */
18414 static struct type
*
18415 dwarf2_init_integer_type (struct dwarf2_cu
*cu
, struct objfile
*objfile
,
18416 int bits
, int unsigned_p
, const char *name
)
18420 /* Versions of Intel's C Compiler generate an integer type called "void"
18421 instead of using DW_TAG_unspecified_type. This has been seen on
18422 at least versions 14, 17, and 18. */
18423 if (bits
== 0 && producer_is_icc (cu
) && name
!= nullptr
18424 && strcmp (name
, "void") == 0)
18425 type
= objfile_type (objfile
)->builtin_void
;
18427 type
= init_integer_type (objfile
, bits
, unsigned_p
, name
);
18432 /* Return true if DIE has a DW_AT_small attribute whose value is
18433 a constant rational, where both the numerator and denominator
18436 CU is the DIE's Compilation Unit. */
18439 has_zero_over_zero_small_attribute (struct die_info
*die
,
18440 struct dwarf2_cu
*cu
)
18442 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_small
, cu
);
18443 if (attr
== nullptr)
18446 struct dwarf2_cu
*scale_cu
= cu
;
18447 struct die_info
*scale_die
18448 = follow_die_ref (die
, attr
, &scale_cu
);
18450 if (scale_die
->tag
!= DW_TAG_constant
)
18453 gdb_mpz
num (1), denom (1);
18454 get_dwarf2_rational_constant (scale_die
, cu
, &num
, &denom
);
18455 return mpz_sgn (num
.val
) == 0 && mpz_sgn (denom
.val
) == 0;
18458 /* Initialise and return a floating point type of size BITS suitable for
18459 use as a component of a complex number. The NAME_HINT is passed through
18460 when initialising the floating point type and is the name of the complex
18463 As DWARF doesn't currently provide an explicit name for the components
18464 of a complex number, but it can be helpful to have these components
18465 named, we try to select a suitable name based on the size of the
18467 static struct type
*
18468 dwarf2_init_complex_target_type (struct dwarf2_cu
*cu
,
18469 struct objfile
*objfile
,
18470 int bits
, const char *name_hint
,
18471 enum bfd_endian byte_order
)
18473 gdbarch
*gdbarch
= objfile
->arch ();
18474 struct type
*tt
= nullptr;
18476 /* Try to find a suitable floating point builtin type of size BITS.
18477 We're going to use the name of this type as the name for the complex
18478 target type that we are about to create. */
18479 switch (cu
->language
)
18481 case language_fortran
:
18485 tt
= builtin_f_type (gdbarch
)->builtin_real
;
18488 tt
= builtin_f_type (gdbarch
)->builtin_real_s8
;
18490 case 96: /* The x86-32 ABI specifies 96-bit long double. */
18492 tt
= builtin_f_type (gdbarch
)->builtin_real_s16
;
18500 tt
= builtin_type (gdbarch
)->builtin_float
;
18503 tt
= builtin_type (gdbarch
)->builtin_double
;
18505 case 96: /* The x86-32 ABI specifies 96-bit long double. */
18507 tt
= builtin_type (gdbarch
)->builtin_long_double
;
18513 /* If the type we found doesn't match the size we were looking for, then
18514 pretend we didn't find a type at all, the complex target type we
18515 create will then be nameless. */
18516 if (tt
!= nullptr && TYPE_LENGTH (tt
) * TARGET_CHAR_BIT
!= bits
)
18519 const char *name
= (tt
== nullptr) ? nullptr : tt
->name ();
18520 return dwarf2_init_float_type (objfile
, bits
, name
, name_hint
, byte_order
);
18523 /* Find a representation of a given base type and install
18524 it in the TYPE field of the die. */
18526 static struct type
*
18527 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18529 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
18531 struct attribute
*attr
;
18532 int encoding
= 0, bits
= 0;
18536 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
18537 if (attr
!= nullptr && attr
->form_is_constant ())
18538 encoding
= attr
->constant_value (0);
18539 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
18540 if (attr
!= nullptr)
18541 bits
= attr
->constant_value (0) * TARGET_CHAR_BIT
;
18542 name
= dwarf2_name (die
, cu
);
18544 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
18546 arch
= objfile
->arch ();
18547 enum bfd_endian byte_order
= gdbarch_byte_order (arch
);
18549 attr
= dwarf2_attr (die
, DW_AT_endianity
, cu
);
18550 if (attr
!= nullptr && attr
->form_is_constant ())
18552 int endianity
= attr
->constant_value (0);
18557 byte_order
= BFD_ENDIAN_BIG
;
18559 case DW_END_little
:
18560 byte_order
= BFD_ENDIAN_LITTLE
;
18563 complaint (_("DW_AT_endianity has unrecognized value %d"), endianity
);
18568 if ((encoding
== DW_ATE_signed_fixed
|| encoding
== DW_ATE_unsigned_fixed
)
18569 && cu
->language
== language_ada
18570 && has_zero_over_zero_small_attribute (die
, cu
))
18572 /* brobecker/2018-02-24: This is a fixed point type for which
18573 the scaling factor is represented as fraction whose value
18574 does not make sense (zero divided by zero), so we should
18575 normally never see these. However, there is a small category
18576 of fixed point types for which GNAT is unable to provide
18577 the scaling factor via the standard DWARF mechanisms, and
18578 for which the info is provided via the GNAT encodings instead.
18579 This is likely what this DIE is about.
18581 Ideally, GNAT should be declaring this type the same way
18582 it declares other fixed point types when using the legacy
18583 GNAT encoding, which is to use a simple signed or unsigned
18584 base type. A report to the GNAT team has been created to
18585 look into it. In the meantime, pretend this type is a simple
18586 signed or unsigned integral, rather than a fixed point type,
18587 to avoid any confusion later on as to how to process this type. */
18588 encoding
= (encoding
== DW_ATE_signed_fixed
18590 : DW_ATE_unsigned
);
18595 case DW_ATE_address
:
18596 /* Turn DW_ATE_address into a void * pointer. */
18597 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
18598 type
= init_pointer_type (objfile
, bits
, name
, type
);
18600 case DW_ATE_boolean
:
18601 type
= init_boolean_type (objfile
, bits
, 1, name
);
18603 case DW_ATE_complex_float
:
18604 type
= dwarf2_init_complex_target_type (cu
, objfile
, bits
/ 2, name
,
18606 if (type
->code () == TYPE_CODE_ERROR
)
18608 if (name
== nullptr)
18610 struct obstack
*obstack
18611 = &cu
->per_objfile
->objfile
->objfile_obstack
;
18612 name
= obconcat (obstack
, "_Complex ", type
->name (),
18615 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
18618 type
= init_complex_type (name
, type
);
18620 case DW_ATE_decimal_float
:
18621 type
= init_decfloat_type (objfile
, bits
, name
);
18624 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
, byte_order
);
18626 case DW_ATE_signed
:
18627 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
18629 case DW_ATE_unsigned
:
18630 if (cu
->language
== language_fortran
18632 && startswith (name
, "character("))
18633 type
= init_character_type (objfile
, bits
, 1, name
);
18635 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
18637 case DW_ATE_signed_char
:
18638 if (cu
->language
== language_ada
|| cu
->language
== language_m2
18639 || cu
->language
== language_pascal
18640 || cu
->language
== language_fortran
)
18641 type
= init_character_type (objfile
, bits
, 0, name
);
18643 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
18645 case DW_ATE_unsigned_char
:
18646 if (cu
->language
== language_ada
|| cu
->language
== language_m2
18647 || cu
->language
== language_pascal
18648 || cu
->language
== language_fortran
18649 || cu
->language
== language_rust
)
18650 type
= init_character_type (objfile
, bits
, 1, name
);
18652 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
18657 type
= builtin_type (arch
)->builtin_char16
;
18658 else if (bits
== 32)
18659 type
= builtin_type (arch
)->builtin_char32
;
18662 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
18664 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
18666 return set_die_type (die
, type
, cu
);
18669 case DW_ATE_signed_fixed
:
18670 type
= init_fixed_point_type (objfile
, bits
, 0, name
);
18671 finish_fixed_point_type (type
, die
, cu
);
18673 case DW_ATE_unsigned_fixed
:
18674 type
= init_fixed_point_type (objfile
, bits
, 1, name
);
18675 finish_fixed_point_type (type
, die
, cu
);
18679 complaint (_("unsupported DW_AT_encoding: '%s'"),
18680 dwarf_type_encoding_name (encoding
));
18681 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
18685 if (name
&& strcmp (name
, "char") == 0)
18686 type
->set_has_no_signedness (true);
18688 maybe_set_alignment (cu
, die
, type
);
18690 type
->set_endianity_is_not_default (gdbarch_byte_order (arch
) != byte_order
);
18692 if (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_INT
)
18694 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
18695 if (attr
!= nullptr && attr
->as_unsigned () <= 8 * TYPE_LENGTH (type
))
18697 unsigned real_bit_size
= attr
->as_unsigned ();
18698 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
18699 /* Only use the attributes if they make sense together. */
18700 if (attr
== nullptr
18701 || (attr
->as_unsigned () + real_bit_size
18702 <= 8 * TYPE_LENGTH (type
)))
18704 TYPE_MAIN_TYPE (type
)->type_specific
.int_stuff
.bit_size
18706 if (attr
!= nullptr)
18707 TYPE_MAIN_TYPE (type
)->type_specific
.int_stuff
.bit_offset
18708 = attr
->as_unsigned ();
18713 return set_die_type (die
, type
, cu
);
18716 /* Parse dwarf attribute if it's a block, reference or constant and put the
18717 resulting value of the attribute into struct bound_prop.
18718 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
18721 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
18722 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
,
18723 struct type
*default_type
)
18725 struct dwarf2_property_baton
*baton
;
18726 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
18727 struct objfile
*objfile
= per_objfile
->objfile
;
18728 struct obstack
*obstack
= &objfile
->objfile_obstack
;
18730 gdb_assert (default_type
!= NULL
);
18732 if (attr
== NULL
|| prop
== NULL
)
18735 if (attr
->form_is_block ())
18737 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
18738 baton
->property_type
= default_type
;
18739 baton
->locexpr
.per_cu
= cu
->per_cu
;
18740 baton
->locexpr
.per_objfile
= per_objfile
;
18742 struct dwarf_block
*block
= attr
->as_block ();
18743 baton
->locexpr
.size
= block
->size
;
18744 baton
->locexpr
.data
= block
->data
;
18745 switch (attr
->name
)
18747 case DW_AT_string_length
:
18748 baton
->locexpr
.is_reference
= true;
18751 baton
->locexpr
.is_reference
= false;
18755 prop
->set_locexpr (baton
);
18756 gdb_assert (prop
->baton () != NULL
);
18758 else if (attr
->form_is_ref ())
18760 struct dwarf2_cu
*target_cu
= cu
;
18761 struct die_info
*target_die
;
18762 struct attribute
*target_attr
;
18764 target_die
= follow_die_ref (die
, attr
, &target_cu
);
18765 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
18766 if (target_attr
== NULL
)
18767 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
18769 if (target_attr
== NULL
)
18772 switch (target_attr
->name
)
18774 case DW_AT_location
:
18775 if (target_attr
->form_is_section_offset ())
18777 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
18778 baton
->property_type
= die_type (target_die
, target_cu
);
18779 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
18780 prop
->set_loclist (baton
);
18781 gdb_assert (prop
->baton () != NULL
);
18783 else if (target_attr
->form_is_block ())
18785 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
18786 baton
->property_type
= die_type (target_die
, target_cu
);
18787 baton
->locexpr
.per_cu
= cu
->per_cu
;
18788 baton
->locexpr
.per_objfile
= per_objfile
;
18789 struct dwarf_block
*block
= target_attr
->as_block ();
18790 baton
->locexpr
.size
= block
->size
;
18791 baton
->locexpr
.data
= block
->data
;
18792 baton
->locexpr
.is_reference
= true;
18793 prop
->set_locexpr (baton
);
18794 gdb_assert (prop
->baton () != NULL
);
18798 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18799 "dynamic property");
18803 case DW_AT_data_member_location
:
18807 if (!handle_data_member_location (target_die
, target_cu
,
18811 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
18812 baton
->property_type
= read_type_die (target_die
->parent
,
18814 baton
->offset_info
.offset
= offset
;
18815 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
18816 prop
->set_addr_offset (baton
);
18821 else if (attr
->form_is_constant ())
18822 prop
->set_const_val (attr
->constant_value (0));
18825 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
18826 dwarf2_name (die
, cu
));
18836 dwarf2_per_objfile::int_type (int size_in_bytes
, bool unsigned_p
) const
18838 struct type
*int_type
;
18840 /* Helper macro to examine the various builtin types. */
18841 #define TRY_TYPE(F) \
18842 int_type = (unsigned_p \
18843 ? objfile_type (objfile)->builtin_unsigned_ ## F \
18844 : objfile_type (objfile)->builtin_ ## F); \
18845 if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \
18852 TRY_TYPE (long_long
);
18856 gdb_assert_not_reached ("unable to find suitable integer type");
18862 dwarf2_cu::addr_sized_int_type (bool unsigned_p
) const
18864 int addr_size
= this->per_cu
->addr_size ();
18865 return this->per_objfile
->int_type (addr_size
, unsigned_p
);
18868 /* Read the DW_AT_type attribute for a sub-range. If this attribute is not
18869 present (which is valid) then compute the default type based on the
18870 compilation units address size. */
18872 static struct type
*
18873 read_subrange_index_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18875 struct type
*index_type
= die_type (die
, cu
);
18877 /* Dwarf-2 specifications explicitly allows to create subrange types
18878 without specifying a base type.
18879 In that case, the base type must be set to the type of
18880 the lower bound, upper bound or count, in that order, if any of these
18881 three attributes references an object that has a type.
18882 If no base type is found, the Dwarf-2 specifications say that
18883 a signed integer type of size equal to the size of an address should
18885 For the following C code: `extern char gdb_int [];'
18886 GCC produces an empty range DIE.
18887 FIXME: muller/2010-05-28: Possible references to object for low bound,
18888 high bound or count are not yet handled by this code. */
18889 if (index_type
->code () == TYPE_CODE_VOID
)
18890 index_type
= cu
->addr_sized_int_type (false);
18895 /* Read the given DW_AT_subrange DIE. */
18897 static struct type
*
18898 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18900 struct type
*base_type
, *orig_base_type
;
18901 struct type
*range_type
;
18902 struct attribute
*attr
;
18903 struct dynamic_prop low
, high
;
18904 int low_default_is_valid
;
18905 int high_bound_is_count
= 0;
18907 ULONGEST negative_mask
;
18909 orig_base_type
= read_subrange_index_type (die
, cu
);
18911 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
18912 whereas the real type might be. So, we use ORIG_BASE_TYPE when
18913 creating the range type, but we use the result of check_typedef
18914 when examining properties of the type. */
18915 base_type
= check_typedef (orig_base_type
);
18917 /* The die_type call above may have already set the type for this DIE. */
18918 range_type
= get_die_type (die
, cu
);
18922 high
.set_const_val (0);
18924 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
18925 omitting DW_AT_lower_bound. */
18926 switch (cu
->language
)
18929 case language_cplus
:
18930 low
.set_const_val (0);
18931 low_default_is_valid
= 1;
18933 case language_fortran
:
18934 low
.set_const_val (1);
18935 low_default_is_valid
= 1;
18938 case language_objc
:
18939 case language_rust
:
18940 low
.set_const_val (0);
18941 low_default_is_valid
= (cu
->header
.version
>= 4);
18945 case language_pascal
:
18946 low
.set_const_val (1);
18947 low_default_is_valid
= (cu
->header
.version
>= 4);
18950 low
.set_const_val (0);
18951 low_default_is_valid
= 0;
18955 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
18956 if (attr
!= nullptr)
18957 attr_to_dynamic_prop (attr
, die
, cu
, &low
, base_type
);
18958 else if (!low_default_is_valid
)
18959 complaint (_("Missing DW_AT_lower_bound "
18960 "- DIE at %s [in module %s]"),
18961 sect_offset_str (die
->sect_off
),
18962 objfile_name (cu
->per_objfile
->objfile
));
18964 struct attribute
*attr_ub
, *attr_count
;
18965 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
18966 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
18968 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
18969 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
18971 /* If bounds are constant do the final calculation here. */
18972 if (low
.kind () == PROP_CONST
&& high
.kind () == PROP_CONST
)
18973 high
.set_const_val (low
.const_val () + high
.const_val () - 1);
18975 high_bound_is_count
= 1;
18979 if (attr_ub
!= NULL
)
18980 complaint (_("Unresolved DW_AT_upper_bound "
18981 "- DIE at %s [in module %s]"),
18982 sect_offset_str (die
->sect_off
),
18983 objfile_name (cu
->per_objfile
->objfile
));
18984 if (attr_count
!= NULL
)
18985 complaint (_("Unresolved DW_AT_count "
18986 "- DIE at %s [in module %s]"),
18987 sect_offset_str (die
->sect_off
),
18988 objfile_name (cu
->per_objfile
->objfile
));
18993 struct attribute
*bias_attr
= dwarf2_attr (die
, DW_AT_GNU_bias
, cu
);
18994 if (bias_attr
!= nullptr && bias_attr
->form_is_constant ())
18995 bias
= bias_attr
->constant_value (0);
18997 /* Normally, the DWARF producers are expected to use a signed
18998 constant form (Eg. DW_FORM_sdata) to express negative bounds.
18999 But this is unfortunately not always the case, as witnessed
19000 with GCC, for instance, where the ambiguous DW_FORM_dataN form
19001 is used instead. To work around that ambiguity, we treat
19002 the bounds as signed, and thus sign-extend their values, when
19003 the base type is signed. */
19005 -((ULONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
19006 if (low
.kind () == PROP_CONST
19007 && !base_type
->is_unsigned () && (low
.const_val () & negative_mask
))
19008 low
.set_const_val (low
.const_val () | negative_mask
);
19009 if (high
.kind () == PROP_CONST
19010 && !base_type
->is_unsigned () && (high
.const_val () & negative_mask
))
19011 high
.set_const_val (high
.const_val () | negative_mask
);
19013 /* Check for bit and byte strides. */
19014 struct dynamic_prop byte_stride_prop
;
19015 attribute
*attr_byte_stride
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
19016 if (attr_byte_stride
!= nullptr)
19018 struct type
*prop_type
= cu
->addr_sized_int_type (false);
19019 attr_to_dynamic_prop (attr_byte_stride
, die
, cu
, &byte_stride_prop
,
19023 struct dynamic_prop bit_stride_prop
;
19024 attribute
*attr_bit_stride
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
19025 if (attr_bit_stride
!= nullptr)
19027 /* It only makes sense to have either a bit or byte stride. */
19028 if (attr_byte_stride
!= nullptr)
19030 complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride "
19031 "- DIE at %s [in module %s]"),
19032 sect_offset_str (die
->sect_off
),
19033 objfile_name (cu
->per_objfile
->objfile
));
19034 attr_bit_stride
= nullptr;
19038 struct type
*prop_type
= cu
->addr_sized_int_type (false);
19039 attr_to_dynamic_prop (attr_bit_stride
, die
, cu
, &bit_stride_prop
,
19044 if (attr_byte_stride
!= nullptr
19045 || attr_bit_stride
!= nullptr)
19047 bool byte_stride_p
= (attr_byte_stride
!= nullptr);
19048 struct dynamic_prop
*stride
19049 = byte_stride_p
? &byte_stride_prop
: &bit_stride_prop
;
19052 = create_range_type_with_stride (NULL
, orig_base_type
, &low
,
19053 &high
, bias
, stride
, byte_stride_p
);
19056 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
, bias
);
19058 if (high_bound_is_count
)
19059 range_type
->bounds ()->flag_upper_bound_is_count
= 1;
19061 /* Ada expects an empty array on no boundary attributes. */
19062 if (attr
== NULL
&& cu
->language
!= language_ada
)
19063 range_type
->bounds ()->high
.set_undefined ();
19065 name
= dwarf2_name (die
, cu
);
19067 range_type
->set_name (name
);
19069 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
19070 if (attr
!= nullptr)
19071 TYPE_LENGTH (range_type
) = attr
->constant_value (0);
19073 maybe_set_alignment (cu
, die
, range_type
);
19075 set_die_type (die
, range_type
, cu
);
19077 /* set_die_type should be already done. */
19078 set_descriptive_type (range_type
, die
, cu
);
19083 static struct type
*
19084 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
19088 type
= init_type (cu
->per_objfile
->objfile
, TYPE_CODE_VOID
, 0, NULL
);
19089 type
->set_name (dwarf2_name (die
, cu
));
19091 /* In Ada, an unspecified type is typically used when the description
19092 of the type is deferred to a different unit. When encountering
19093 such a type, we treat it as a stub, and try to resolve it later on,
19095 if (cu
->language
== language_ada
)
19096 type
->set_is_stub (true);
19098 return set_die_type (die
, type
, cu
);
19101 /* Read a single die and all its descendents. Set the die's sibling
19102 field to NULL; set other fields in the die correctly, and set all
19103 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
19104 location of the info_ptr after reading all of those dies. PARENT
19105 is the parent of the die in question. */
19107 static struct die_info
*
19108 read_die_and_children (const struct die_reader_specs
*reader
,
19109 const gdb_byte
*info_ptr
,
19110 const gdb_byte
**new_info_ptr
,
19111 struct die_info
*parent
)
19113 struct die_info
*die
;
19114 const gdb_byte
*cur_ptr
;
19116 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, 0);
19119 *new_info_ptr
= cur_ptr
;
19122 store_in_ref_table (die
, reader
->cu
);
19124 if (die
->has_children
)
19125 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
19129 *new_info_ptr
= cur_ptr
;
19132 die
->sibling
= NULL
;
19133 die
->parent
= parent
;
19137 /* Read a die, all of its descendents, and all of its siblings; set
19138 all of the fields of all of the dies correctly. Arguments are as
19139 in read_die_and_children. */
19141 static struct die_info
*
19142 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
19143 const gdb_byte
*info_ptr
,
19144 const gdb_byte
**new_info_ptr
,
19145 struct die_info
*parent
)
19147 struct die_info
*first_die
, *last_sibling
;
19148 const gdb_byte
*cur_ptr
;
19150 cur_ptr
= info_ptr
;
19151 first_die
= last_sibling
= NULL
;
19155 struct die_info
*die
19156 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
19160 *new_info_ptr
= cur_ptr
;
19167 last_sibling
->sibling
= die
;
19169 last_sibling
= die
;
19173 /* Read a die, all of its descendents, and all of its siblings; set
19174 all of the fields of all of the dies correctly. Arguments are as
19175 in read_die_and_children.
19176 This the main entry point for reading a DIE and all its children. */
19178 static struct die_info
*
19179 read_die_and_siblings (const struct die_reader_specs
*reader
,
19180 const gdb_byte
*info_ptr
,
19181 const gdb_byte
**new_info_ptr
,
19182 struct die_info
*parent
)
19184 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
19185 new_info_ptr
, parent
);
19187 if (dwarf_die_debug
)
19189 fprintf_unfiltered (gdb_stdlog
,
19190 "Read die from %s@0x%x of %s:\n",
19191 reader
->die_section
->get_name (),
19192 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
19193 bfd_get_filename (reader
->abfd
));
19194 dump_die (die
, dwarf_die_debug
);
19200 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
19202 The caller is responsible for filling in the extra attributes
19203 and updating (*DIEP)->num_attrs.
19204 Set DIEP to point to a newly allocated die with its information,
19205 except for its child, sibling, and parent fields. */
19207 static const gdb_byte
*
19208 read_full_die_1 (const struct die_reader_specs
*reader
,
19209 struct die_info
**diep
, const gdb_byte
*info_ptr
,
19210 int num_extra_attrs
)
19212 unsigned int abbrev_number
, bytes_read
, i
;
19213 struct abbrev_info
*abbrev
;
19214 struct die_info
*die
;
19215 struct dwarf2_cu
*cu
= reader
->cu
;
19216 bfd
*abfd
= reader
->abfd
;
19218 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
19219 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19220 info_ptr
+= bytes_read
;
19221 if (!abbrev_number
)
19227 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
19229 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
19231 bfd_get_filename (abfd
));
19233 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
19234 die
->sect_off
= sect_off
;
19235 die
->tag
= abbrev
->tag
;
19236 die
->abbrev
= abbrev_number
;
19237 die
->has_children
= abbrev
->has_children
;
19239 /* Make the result usable.
19240 The caller needs to update num_attrs after adding the extra
19242 die
->num_attrs
= abbrev
->num_attrs
;
19244 bool any_need_reprocess
= false;
19245 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
19247 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
19249 if (die
->attrs
[i
].requires_reprocessing_p ())
19250 any_need_reprocess
= true;
19253 struct attribute
*attr
= die
->attr (DW_AT_str_offsets_base
);
19254 if (attr
!= nullptr && attr
->form_is_unsigned ())
19255 cu
->str_offsets_base
= attr
->as_unsigned ();
19257 attr
= die
->attr (DW_AT_loclists_base
);
19258 if (attr
!= nullptr)
19259 cu
->loclist_base
= attr
->as_unsigned ();
19261 auto maybe_addr_base
= die
->addr_base ();
19262 if (maybe_addr_base
.has_value ())
19263 cu
->addr_base
= *maybe_addr_base
;
19265 attr
= die
->attr (DW_AT_rnglists_base
);
19266 if (attr
!= nullptr)
19267 cu
->ranges_base
= attr
->as_unsigned ();
19269 if (any_need_reprocess
)
19271 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
19273 if (die
->attrs
[i
].requires_reprocessing_p ())
19274 read_attribute_reprocess (reader
, &die
->attrs
[i
], die
->tag
);
19281 /* Read a die and all its attributes.
19282 Set DIEP to point to a newly allocated die with its information,
19283 except for its child, sibling, and parent fields. */
19285 static const gdb_byte
*
19286 read_full_die (const struct die_reader_specs
*reader
,
19287 struct die_info
**diep
, const gdb_byte
*info_ptr
)
19289 const gdb_byte
*result
;
19291 result
= read_full_die_1 (reader
, diep
, info_ptr
, 0);
19293 if (dwarf_die_debug
)
19295 fprintf_unfiltered (gdb_stdlog
,
19296 "Read die from %s@0x%x of %s:\n",
19297 reader
->die_section
->get_name (),
19298 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
19299 bfd_get_filename (reader
->abfd
));
19300 dump_die (*diep
, dwarf_die_debug
);
19307 /* Returns nonzero if TAG represents a type that we might generate a partial
19311 is_type_tag_for_partial (int tag
, enum language lang
)
19316 /* Some types that would be reasonable to generate partial symbols for,
19317 that we don't at present. Note that normally this does not
19318 matter, mainly because C compilers don't give names to these
19319 types, but instead emit DW_TAG_typedef. */
19320 case DW_TAG_file_type
:
19321 case DW_TAG_ptr_to_member_type
:
19322 case DW_TAG_set_type
:
19323 case DW_TAG_string_type
:
19324 case DW_TAG_subroutine_type
:
19327 /* GNAT may emit an array with a name, but no typedef, so we
19328 need to make a symbol in this case. */
19329 case DW_TAG_array_type
:
19330 return lang
== language_ada
;
19332 case DW_TAG_base_type
:
19333 case DW_TAG_class_type
:
19334 case DW_TAG_interface_type
:
19335 case DW_TAG_enumeration_type
:
19336 case DW_TAG_structure_type
:
19337 case DW_TAG_subrange_type
:
19338 case DW_TAG_typedef
:
19339 case DW_TAG_union_type
:
19346 /* Load all DIEs that are interesting for partial symbols into memory. */
19348 static struct partial_die_info
*
19349 load_partial_dies (const struct die_reader_specs
*reader
,
19350 const gdb_byte
*info_ptr
, int building_psymtab
)
19352 struct dwarf2_cu
*cu
= reader
->cu
;
19353 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
19354 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
19355 unsigned int bytes_read
;
19356 unsigned int load_all
= 0;
19357 int nesting_level
= 1;
19362 gdb_assert (cu
->per_cu
!= NULL
);
19363 if (cu
->per_cu
->load_all_dies
)
19367 = htab_create_alloc_ex (cu
->header
.length
/ 12,
19371 &cu
->comp_unit_obstack
,
19372 hashtab_obstack_allocate
,
19373 dummy_obstack_deallocate
);
19377 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
19379 /* A NULL abbrev means the end of a series of children. */
19380 if (abbrev
== NULL
)
19382 if (--nesting_level
== 0)
19385 info_ptr
+= bytes_read
;
19386 last_die
= parent_die
;
19387 parent_die
= parent_die
->die_parent
;
19391 /* Check for template arguments. We never save these; if
19392 they're seen, we just mark the parent, and go on our way. */
19393 if (parent_die
!= NULL
19394 && cu
->language
== language_cplus
19395 && (abbrev
->tag
== DW_TAG_template_type_param
19396 || abbrev
->tag
== DW_TAG_template_value_param
))
19398 parent_die
->has_template_arguments
= 1;
19402 /* We don't need a partial DIE for the template argument. */
19403 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
19408 /* We only recurse into c++ subprograms looking for template arguments.
19409 Skip their other children. */
19411 && cu
->language
== language_cplus
19412 && parent_die
!= NULL
19413 && parent_die
->tag
== DW_TAG_subprogram
19414 && abbrev
->tag
!= DW_TAG_inlined_subroutine
)
19416 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
19420 /* Check whether this DIE is interesting enough to save. Normally
19421 we would not be interested in members here, but there may be
19422 later variables referencing them via DW_AT_specification (for
19423 static members). */
19425 && !is_type_tag_for_partial (abbrev
->tag
, cu
->language
)
19426 && abbrev
->tag
!= DW_TAG_constant
19427 && abbrev
->tag
!= DW_TAG_enumerator
19428 && abbrev
->tag
!= DW_TAG_subprogram
19429 && abbrev
->tag
!= DW_TAG_inlined_subroutine
19430 && abbrev
->tag
!= DW_TAG_lexical_block
19431 && abbrev
->tag
!= DW_TAG_variable
19432 && abbrev
->tag
!= DW_TAG_namespace
19433 && abbrev
->tag
!= DW_TAG_module
19434 && abbrev
->tag
!= DW_TAG_member
19435 && abbrev
->tag
!= DW_TAG_imported_unit
19436 && abbrev
->tag
!= DW_TAG_imported_declaration
)
19438 /* Otherwise we skip to the next sibling, if any. */
19439 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
19443 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
19446 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
19448 /* This two-pass algorithm for processing partial symbols has a
19449 high cost in cache pressure. Thus, handle some simple cases
19450 here which cover the majority of C partial symbols. DIEs
19451 which neither have specification tags in them, nor could have
19452 specification tags elsewhere pointing at them, can simply be
19453 processed and discarded.
19455 This segment is also optional; scan_partial_symbols and
19456 add_partial_symbol will handle these DIEs if we chain
19457 them in normally. When compilers which do not emit large
19458 quantities of duplicate debug information are more common,
19459 this code can probably be removed. */
19461 /* Any complete simple types at the top level (pretty much all
19462 of them, for a language without namespaces), can be processed
19464 if (parent_die
== NULL
19465 && pdi
.has_specification
== 0
19466 && pdi
.is_declaration
== 0
19467 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
19468 || pdi
.tag
== DW_TAG_base_type
19469 || pdi
.tag
== DW_TAG_array_type
19470 || pdi
.tag
== DW_TAG_subrange_type
))
19472 if (building_psymtab
&& pdi
.raw_name
!= NULL
)
19473 add_partial_symbol (&pdi
, cu
);
19475 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
19479 /* The exception for DW_TAG_typedef with has_children above is
19480 a workaround of GCC PR debug/47510. In the case of this complaint
19481 type_name_or_error will error on such types later.
19483 GDB skipped children of DW_TAG_typedef by the shortcut above and then
19484 it could not find the child DIEs referenced later, this is checked
19485 above. In correct DWARF DW_TAG_typedef should have no children. */
19487 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
19488 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
19489 "- DIE at %s [in module %s]"),
19490 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
19492 /* If we're at the second level, and we're an enumerator, and
19493 our parent has no specification (meaning possibly lives in a
19494 namespace elsewhere), then we can add the partial symbol now
19495 instead of queueing it. */
19496 if (pdi
.tag
== DW_TAG_enumerator
19497 && parent_die
!= NULL
19498 && parent_die
->die_parent
== NULL
19499 && parent_die
->tag
== DW_TAG_enumeration_type
19500 && parent_die
->has_specification
== 0)
19502 if (pdi
.raw_name
== NULL
)
19503 complaint (_("malformed enumerator DIE ignored"));
19504 else if (building_psymtab
)
19505 add_partial_symbol (&pdi
, cu
);
19507 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
19511 struct partial_die_info
*part_die
19512 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
19514 /* We'll save this DIE so link it in. */
19515 part_die
->die_parent
= parent_die
;
19516 part_die
->die_sibling
= NULL
;
19517 part_die
->die_child
= NULL
;
19519 if (last_die
&& last_die
== parent_die
)
19520 last_die
->die_child
= part_die
;
19522 last_die
->die_sibling
= part_die
;
19524 last_die
= part_die
;
19526 if (first_die
== NULL
)
19527 first_die
= part_die
;
19529 /* Maybe add the DIE to the hash table. Not all DIEs that we
19530 find interesting need to be in the hash table, because we
19531 also have the parent/sibling/child chains; only those that we
19532 might refer to by offset later during partial symbol reading.
19534 For now this means things that might have be the target of a
19535 DW_AT_specification, DW_AT_abstract_origin, or
19536 DW_AT_extension. DW_AT_extension will refer only to
19537 namespaces; DW_AT_abstract_origin refers to functions (and
19538 many things under the function DIE, but we do not recurse
19539 into function DIEs during partial symbol reading) and
19540 possibly variables as well; DW_AT_specification refers to
19541 declarations. Declarations ought to have the DW_AT_declaration
19542 flag. It happens that GCC forgets to put it in sometimes, but
19543 only for functions, not for types.
19545 Adding more things than necessary to the hash table is harmless
19546 except for the performance cost. Adding too few will result in
19547 wasted time in find_partial_die, when we reread the compilation
19548 unit with load_all_dies set. */
19551 || abbrev
->tag
== DW_TAG_constant
19552 || abbrev
->tag
== DW_TAG_subprogram
19553 || abbrev
->tag
== DW_TAG_variable
19554 || abbrev
->tag
== DW_TAG_namespace
19555 || part_die
->is_declaration
)
19559 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
19560 to_underlying (part_die
->sect_off
),
19565 /* For some DIEs we want to follow their children (if any). For C
19566 we have no reason to follow the children of structures; for other
19567 languages we have to, so that we can get at method physnames
19568 to infer fully qualified class names, for DW_AT_specification,
19569 and for C++ template arguments. For C++, we also look one level
19570 inside functions to find template arguments (if the name of the
19571 function does not already contain the template arguments).
19573 For Ada and Fortran, we need to scan the children of subprograms
19574 and lexical blocks as well because these languages allow the
19575 definition of nested entities that could be interesting for the
19576 debugger, such as nested subprograms for instance. */
19577 if (last_die
->has_children
19579 || last_die
->tag
== DW_TAG_namespace
19580 || last_die
->tag
== DW_TAG_module
19581 || last_die
->tag
== DW_TAG_enumeration_type
19582 || (cu
->language
== language_cplus
19583 && last_die
->tag
== DW_TAG_subprogram
19584 && (last_die
->raw_name
== NULL
19585 || strchr (last_die
->raw_name
, '<') == NULL
))
19586 || (cu
->language
!= language_c
19587 && (last_die
->tag
== DW_TAG_class_type
19588 || last_die
->tag
== DW_TAG_interface_type
19589 || last_die
->tag
== DW_TAG_structure_type
19590 || last_die
->tag
== DW_TAG_union_type
))
19591 || ((cu
->language
== language_ada
19592 || cu
->language
== language_fortran
)
19593 && (last_die
->tag
== DW_TAG_subprogram
19594 || last_die
->tag
== DW_TAG_lexical_block
))))
19597 parent_die
= last_die
;
19601 /* Otherwise we skip to the next sibling, if any. */
19602 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
19604 /* Back to the top, do it again. */
19608 partial_die_info::partial_die_info (sect_offset sect_off_
,
19609 struct abbrev_info
*abbrev
)
19610 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
19614 /* See class definition. */
19617 partial_die_info::name (dwarf2_cu
*cu
)
19619 if (!canonical_name
&& raw_name
!= nullptr)
19621 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
19622 raw_name
= dwarf2_canonicalize_name (raw_name
, cu
, objfile
);
19623 canonical_name
= 1;
19629 /* Read a minimal amount of information into the minimal die structure.
19630 INFO_PTR should point just after the initial uleb128 of a DIE. */
19633 partial_die_info::read (const struct die_reader_specs
*reader
,
19634 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
19636 struct dwarf2_cu
*cu
= reader
->cu
;
19637 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
19639 int has_low_pc_attr
= 0;
19640 int has_high_pc_attr
= 0;
19641 int high_pc_relative
= 0;
19643 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
19646 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
], info_ptr
);
19647 /* String and address offsets that need to do the reprocessing have
19648 already been read at this point, so there is no need to wait until
19649 the loop terminates to do the reprocessing. */
19650 if (attr
.requires_reprocessing_p ())
19651 read_attribute_reprocess (reader
, &attr
, tag
);
19652 /* Store the data if it is of an attribute we want to keep in a
19653 partial symbol table. */
19659 case DW_TAG_compile_unit
:
19660 case DW_TAG_partial_unit
:
19661 case DW_TAG_type_unit
:
19662 /* Compilation units have a DW_AT_name that is a filename, not
19663 a source language identifier. */
19664 case DW_TAG_enumeration_type
:
19665 case DW_TAG_enumerator
:
19666 /* These tags always have simple identifiers already; no need
19667 to canonicalize them. */
19668 canonical_name
= 1;
19669 raw_name
= attr
.as_string ();
19672 canonical_name
= 0;
19673 raw_name
= attr
.as_string ();
19677 case DW_AT_linkage_name
:
19678 case DW_AT_MIPS_linkage_name
:
19679 /* Note that both forms of linkage name might appear. We
19680 assume they will be the same, and we only store the last
19682 linkage_name
= attr
.as_string ();
19685 has_low_pc_attr
= 1;
19686 lowpc
= attr
.as_address ();
19688 case DW_AT_high_pc
:
19689 has_high_pc_attr
= 1;
19690 highpc
= attr
.as_address ();
19691 if (cu
->header
.version
>= 4 && attr
.form_is_constant ())
19692 high_pc_relative
= 1;
19694 case DW_AT_location
:
19695 /* Support the .debug_loc offsets. */
19696 if (attr
.form_is_block ())
19698 d
.locdesc
= attr
.as_block ();
19700 else if (attr
.form_is_section_offset ())
19702 dwarf2_complex_location_expr_complaint ();
19706 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
19707 "partial symbol information");
19710 case DW_AT_external
:
19711 is_external
= attr
.as_boolean ();
19713 case DW_AT_declaration
:
19714 is_declaration
= attr
.as_boolean ();
19719 case DW_AT_abstract_origin
:
19720 case DW_AT_specification
:
19721 case DW_AT_extension
:
19722 has_specification
= 1;
19723 spec_offset
= attr
.get_ref_die_offset ();
19724 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
19725 || cu
->per_cu
->is_dwz
);
19727 case DW_AT_sibling
:
19728 /* Ignore absolute siblings, they might point outside of
19729 the current compile unit. */
19730 if (attr
.form
== DW_FORM_ref_addr
)
19731 complaint (_("ignoring absolute DW_AT_sibling"));
19734 const gdb_byte
*buffer
= reader
->buffer
;
19735 sect_offset off
= attr
.get_ref_die_offset ();
19736 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
19738 if (sibling_ptr
< info_ptr
)
19739 complaint (_("DW_AT_sibling points backwards"));
19740 else if (sibling_ptr
> reader
->buffer_end
)
19741 reader
->die_section
->overflow_complaint ();
19743 sibling
= sibling_ptr
;
19746 case DW_AT_byte_size
:
19749 case DW_AT_const_value
:
19750 has_const_value
= 1;
19752 case DW_AT_calling_convention
:
19753 /* DWARF doesn't provide a way to identify a program's source-level
19754 entry point. DW_AT_calling_convention attributes are only meant
19755 to describe functions' calling conventions.
19757 However, because it's a necessary piece of information in
19758 Fortran, and before DWARF 4 DW_CC_program was the only
19759 piece of debugging information whose definition refers to
19760 a 'main program' at all, several compilers marked Fortran
19761 main programs with DW_CC_program --- even when those
19762 functions use the standard calling conventions.
19764 Although DWARF now specifies a way to provide this
19765 information, we support this practice for backward
19767 if (attr
.constant_value (0) == DW_CC_program
19768 && cu
->language
== language_fortran
)
19769 main_subprogram
= 1;
19773 LONGEST value
= attr
.constant_value (-1);
19774 if (value
== DW_INL_inlined
19775 || value
== DW_INL_declared_inlined
)
19776 may_be_inlined
= 1;
19781 if (tag
== DW_TAG_imported_unit
)
19783 d
.sect_off
= attr
.get_ref_die_offset ();
19784 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
19785 || cu
->per_cu
->is_dwz
);
19789 case DW_AT_main_subprogram
:
19790 main_subprogram
= attr
.as_boolean ();
19795 /* DW_AT_rnglists_base does not apply to DIEs from the DWO
19796 skeleton. We take advantage of the fact the DW_AT_ranges
19797 does not appear in DW_TAG_compile_unit of DWO files.
19799 Attributes of the form DW_FORM_rnglistx have already had
19800 their value changed by read_rnglist_index and already
19801 include DW_AT_rnglists_base, so don't need to add the ranges
19803 int need_ranges_base
= (tag
!= DW_TAG_compile_unit
19804 && attr
.form
!= DW_FORM_rnglistx
);
19805 /* It would be nice to reuse dwarf2_get_pc_bounds here,
19806 but that requires a full DIE, so instead we just
19808 unsigned int ranges_offset
= (attr
.constant_value (0)
19809 + (need_ranges_base
19813 /* Value of the DW_AT_ranges attribute is the offset in the
19814 .debug_ranges section. */
19815 if (dwarf2_ranges_read (ranges_offset
, &lowpc
, &highpc
, cu
,
19826 /* For Ada, if both the name and the linkage name appear, we prefer
19827 the latter. This lets "catch exception" work better, regardless
19828 of the order in which the name and linkage name were emitted.
19829 Really, though, this is just a workaround for the fact that gdb
19830 doesn't store both the name and the linkage name. */
19831 if (cu
->language
== language_ada
&& linkage_name
!= nullptr)
19832 raw_name
= linkage_name
;
19834 if (high_pc_relative
)
19837 if (has_low_pc_attr
&& has_high_pc_attr
)
19839 /* When using the GNU linker, .gnu.linkonce. sections are used to
19840 eliminate duplicate copies of functions and vtables and such.
19841 The linker will arbitrarily choose one and discard the others.
19842 The AT_*_pc values for such functions refer to local labels in
19843 these sections. If the section from that file was discarded, the
19844 labels are not in the output, so the relocs get a value of 0.
19845 If this is a discarded function, mark the pc bounds as invalid,
19846 so that GDB will ignore it. */
19847 if (lowpc
== 0 && !per_objfile
->per_bfd
->has_section_at_zero
)
19849 struct objfile
*objfile
= per_objfile
->objfile
;
19850 struct gdbarch
*gdbarch
= objfile
->arch ();
19852 complaint (_("DW_AT_low_pc %s is zero "
19853 "for DIE at %s [in module %s]"),
19854 paddress (gdbarch
, lowpc
),
19855 sect_offset_str (sect_off
),
19856 objfile_name (objfile
));
19858 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
19859 else if (lowpc
>= highpc
)
19861 struct objfile
*objfile
= per_objfile
->objfile
;
19862 struct gdbarch
*gdbarch
= objfile
->arch ();
19864 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
19865 "for DIE at %s [in module %s]"),
19866 paddress (gdbarch
, lowpc
),
19867 paddress (gdbarch
, highpc
),
19868 sect_offset_str (sect_off
),
19869 objfile_name (objfile
));
19878 /* Find a cached partial DIE at OFFSET in CU. */
19880 struct partial_die_info
*
19881 dwarf2_cu::find_partial_die (sect_offset sect_off
)
19883 struct partial_die_info
*lookup_die
= NULL
;
19884 struct partial_die_info
part_die (sect_off
);
19886 lookup_die
= ((struct partial_die_info
*)
19887 htab_find_with_hash (partial_dies
, &part_die
,
19888 to_underlying (sect_off
)));
19893 /* Find a partial DIE at OFFSET, which may or may not be in CU,
19894 except in the case of .debug_types DIEs which do not reference
19895 outside their CU (they do however referencing other types via
19896 DW_FORM_ref_sig8). */
19898 static const struct cu_partial_die_info
19899 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
19901 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
19902 struct objfile
*objfile
= per_objfile
->objfile
;
19903 struct partial_die_info
*pd
= NULL
;
19905 if (offset_in_dwz
== cu
->per_cu
->is_dwz
19906 && cu
->header
.offset_in_cu_p (sect_off
))
19908 pd
= cu
->find_partial_die (sect_off
);
19911 /* We missed recording what we needed.
19912 Load all dies and try again. */
19916 /* TUs don't reference other CUs/TUs (except via type signatures). */
19917 if (cu
->per_cu
->is_debug_types
)
19919 error (_("Dwarf Error: Type Unit at offset %s contains"
19920 " external reference to offset %s [in module %s].\n"),
19921 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
19922 bfd_get_filename (objfile
->obfd
));
19924 dwarf2_per_cu_data
*per_cu
19925 = dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
19928 cu
= per_objfile
->get_cu (per_cu
);
19929 if (cu
== NULL
|| cu
->partial_dies
== NULL
)
19930 load_partial_comp_unit (per_cu
, per_objfile
, nullptr);
19932 cu
= per_objfile
->get_cu (per_cu
);
19935 pd
= cu
->find_partial_die (sect_off
);
19938 /* If we didn't find it, and not all dies have been loaded,
19939 load them all and try again. */
19941 if (pd
== NULL
&& cu
->per_cu
->load_all_dies
== 0)
19943 cu
->per_cu
->load_all_dies
= 1;
19945 /* This is nasty. When we reread the DIEs, somewhere up the call chain
19946 THIS_CU->cu may already be in use. So we can't just free it and
19947 replace its DIEs with the ones we read in. Instead, we leave those
19948 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
19949 and clobber THIS_CU->cu->partial_dies with the hash table for the new
19951 load_partial_comp_unit (cu
->per_cu
, per_objfile
, cu
);
19953 pd
= cu
->find_partial_die (sect_off
);
19957 error (_("Dwarf Error: Cannot not find DIE at %s [from module %s]\n"),
19958 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
19962 /* See if we can figure out if the class lives in a namespace. We do
19963 this by looking for a member function; its demangled name will
19964 contain namespace info, if there is any. */
19967 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
19968 struct dwarf2_cu
*cu
)
19970 /* NOTE: carlton/2003-10-07: Getting the info this way changes
19971 what template types look like, because the demangler
19972 frequently doesn't give the same name as the debug info. We
19973 could fix this by only using the demangled name to get the
19974 prefix (but see comment in read_structure_type). */
19976 struct partial_die_info
*real_pdi
;
19977 struct partial_die_info
*child_pdi
;
19979 /* If this DIE (this DIE's specification, if any) has a parent, then
19980 we should not do this. We'll prepend the parent's fully qualified
19981 name when we create the partial symbol. */
19983 real_pdi
= struct_pdi
;
19984 while (real_pdi
->has_specification
)
19986 auto res
= find_partial_die (real_pdi
->spec_offset
,
19987 real_pdi
->spec_is_dwz
, cu
);
19988 real_pdi
= res
.pdi
;
19992 if (real_pdi
->die_parent
!= NULL
)
19995 for (child_pdi
= struct_pdi
->die_child
;
19997 child_pdi
= child_pdi
->die_sibling
)
19999 if (child_pdi
->tag
== DW_TAG_subprogram
20000 && child_pdi
->linkage_name
!= NULL
)
20002 gdb::unique_xmalloc_ptr
<char> actual_class_name
20003 (cu
->language_defn
->class_name_from_physname
20004 (child_pdi
->linkage_name
));
20005 if (actual_class_name
!= NULL
)
20007 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
20008 struct_pdi
->raw_name
= objfile
->intern (actual_class_name
.get ());
20009 struct_pdi
->canonical_name
= 1;
20016 /* Return true if a DIE with TAG may have the DW_AT_const_value
20020 can_have_DW_AT_const_value_p (enum dwarf_tag tag
)
20024 case DW_TAG_constant
:
20025 case DW_TAG_enumerator
:
20026 case DW_TAG_formal_parameter
:
20027 case DW_TAG_template_value_param
:
20028 case DW_TAG_variable
:
20036 partial_die_info::fixup (struct dwarf2_cu
*cu
)
20038 /* Once we've fixed up a die, there's no point in doing so again.
20039 This also avoids a memory leak if we were to call
20040 guess_partial_die_structure_name multiple times. */
20044 /* If we found a reference attribute and the DIE has no name, try
20045 to find a name in the referred to DIE. */
20047 if (raw_name
== NULL
&& has_specification
)
20049 struct partial_die_info
*spec_die
;
20051 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
20052 spec_die
= res
.pdi
;
20055 spec_die
->fixup (cu
);
20057 if (spec_die
->raw_name
)
20059 raw_name
= spec_die
->raw_name
;
20060 canonical_name
= spec_die
->canonical_name
;
20062 /* Copy DW_AT_external attribute if it is set. */
20063 if (spec_die
->is_external
)
20064 is_external
= spec_die
->is_external
;
20068 if (!has_const_value
&& has_specification
20069 && can_have_DW_AT_const_value_p (tag
))
20071 struct partial_die_info
*spec_die
;
20073 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
20074 spec_die
= res
.pdi
;
20077 spec_die
->fixup (cu
);
20079 if (spec_die
->has_const_value
)
20081 /* Copy DW_AT_const_value attribute if it is set. */
20082 has_const_value
= spec_die
->has_const_value
;
20086 /* Set default names for some unnamed DIEs. */
20088 if (raw_name
== NULL
&& tag
== DW_TAG_namespace
)
20090 raw_name
= CP_ANONYMOUS_NAMESPACE_STR
;
20091 canonical_name
= 1;
20094 /* If there is no parent die to provide a namespace, and there are
20095 children, see if we can determine the namespace from their linkage
20097 if (cu
->language
== language_cplus
20098 && !cu
->per_objfile
->per_bfd
->types
.empty ()
20099 && die_parent
== NULL
20101 && (tag
== DW_TAG_class_type
20102 || tag
== DW_TAG_structure_type
20103 || tag
== DW_TAG_union_type
))
20104 guess_partial_die_structure_name (this, cu
);
20106 /* GCC might emit a nameless struct or union that has a linkage
20107 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
20108 if (raw_name
== NULL
20109 && (tag
== DW_TAG_class_type
20110 || tag
== DW_TAG_interface_type
20111 || tag
== DW_TAG_structure_type
20112 || tag
== DW_TAG_union_type
)
20113 && linkage_name
!= NULL
)
20115 gdb::unique_xmalloc_ptr
<char> demangled
20116 (gdb_demangle (linkage_name
, DMGL_TYPES
));
20117 if (demangled
!= nullptr)
20121 /* Strip any leading namespaces/classes, keep only the base name.
20122 DW_AT_name for named DIEs does not contain the prefixes. */
20123 base
= strrchr (demangled
.get (), ':');
20124 if (base
&& base
> demangled
.get () && base
[-1] == ':')
20127 base
= demangled
.get ();
20129 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
20130 raw_name
= objfile
->intern (base
);
20131 canonical_name
= 1;
20138 /* Read the .debug_loclists or .debug_rnglists header (they are the same format)
20139 contents from the given SECTION in the HEADER. */
20141 read_loclists_rnglists_header (struct loclists_rnglists_header
*header
,
20142 struct dwarf2_section_info
*section
)
20144 unsigned int bytes_read
;
20145 bfd
*abfd
= section
->get_bfd_owner ();
20146 const gdb_byte
*info_ptr
= section
->buffer
;
20147 header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
20148 info_ptr
+= bytes_read
;
20149 header
->version
= read_2_bytes (abfd
, info_ptr
);
20151 header
->addr_size
= read_1_byte (abfd
, info_ptr
);
20153 header
->segment_collector_size
= read_1_byte (abfd
, info_ptr
);
20155 header
->offset_entry_count
= read_4_bytes (abfd
, info_ptr
);
20158 /* Return the DW_AT_loclists_base value for the CU. */
20160 lookup_loclist_base (struct dwarf2_cu
*cu
)
20162 /* For the .dwo unit, the loclist_base points to the first offset following
20163 the header. The header consists of the following entities-
20164 1. Unit Length (4 bytes for 32 bit DWARF format, and 12 bytes for the 64
20166 2. version (2 bytes)
20167 3. address size (1 byte)
20168 4. segment selector size (1 byte)
20169 5. offset entry count (4 bytes)
20170 These sizes are derived as per the DWARFv5 standard. */
20171 if (cu
->dwo_unit
!= nullptr)
20173 if (cu
->header
.initial_length_size
== 4)
20174 return LOCLIST_HEADER_SIZE32
;
20175 return LOCLIST_HEADER_SIZE64
;
20177 return cu
->loclist_base
;
20180 /* Given a DW_FORM_loclistx value LOCLIST_INDEX, fetch the offset from the
20181 array of offsets in the .debug_loclists section. */
20183 read_loclist_index (struct dwarf2_cu
*cu
, ULONGEST loclist_index
)
20185 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
20186 struct objfile
*objfile
= per_objfile
->objfile
;
20187 bfd
*abfd
= objfile
->obfd
;
20188 ULONGEST loclist_base
= lookup_loclist_base (cu
);
20189 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
20191 section
->read (objfile
);
20192 if (section
->buffer
== NULL
)
20193 complaint (_("DW_FORM_loclistx used without .debug_loclists "
20194 "section [in module %s]"), objfile_name (objfile
));
20195 struct loclists_rnglists_header header
;
20196 read_loclists_rnglists_header (&header
, section
);
20197 if (loclist_index
>= header
.offset_entry_count
)
20198 complaint (_("DW_FORM_loclistx pointing outside of "
20199 ".debug_loclists offset array [in module %s]"),
20200 objfile_name (objfile
));
20201 if (loclist_base
+ loclist_index
* cu
->header
.offset_size
20203 complaint (_("DW_FORM_loclistx pointing outside of "
20204 ".debug_loclists section [in module %s]"),
20205 objfile_name (objfile
));
20206 const gdb_byte
*info_ptr
20207 = section
->buffer
+ loclist_base
+ loclist_index
* cu
->header
.offset_size
;
20209 if (cu
->header
.offset_size
== 4)
20210 return bfd_get_32 (abfd
, info_ptr
) + loclist_base
;
20212 return bfd_get_64 (abfd
, info_ptr
) + loclist_base
;
20215 /* Given a DW_FORM_rnglistx value RNGLIST_INDEX, fetch the offset from the
20216 array of offsets in the .debug_rnglists section. */
20218 read_rnglist_index (struct dwarf2_cu
*cu
, ULONGEST rnglist_index
,
20221 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
20222 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20223 bfd
*abfd
= objfile
->obfd
;
20224 ULONGEST rnglist_header_size
=
20225 (cu
->header
.initial_length_size
== 4 ? RNGLIST_HEADER_SIZE32
20226 : RNGLIST_HEADER_SIZE64
);
20227 ULONGEST rnglist_base
=
20228 (cu
->dwo_unit
!= nullptr) ? rnglist_header_size
: cu
->ranges_base
;
20229 ULONGEST start_offset
=
20230 rnglist_base
+ rnglist_index
* cu
->header
.offset_size
;
20232 /* Get rnglists section. */
20233 struct dwarf2_section_info
*section
= cu_debug_rnglists_section (cu
, tag
);
20235 /* Read the rnglists section content. */
20236 section
->read (objfile
);
20237 if (section
->buffer
== nullptr)
20238 error (_("DW_FORM_rnglistx used without .debug_rnglists section "
20240 objfile_name (objfile
));
20242 /* Verify the rnglist index is valid. */
20243 struct loclists_rnglists_header header
;
20244 read_loclists_rnglists_header (&header
, section
);
20245 if (rnglist_index
>= header
.offset_entry_count
)
20246 error (_("DW_FORM_rnglistx index pointing outside of "
20247 ".debug_rnglists offset array [in module %s]"),
20248 objfile_name (objfile
));
20250 /* Validate that the offset is within the section's range. */
20251 if (start_offset
>= section
->size
)
20252 error (_("DW_FORM_rnglistx pointing outside of "
20253 ".debug_rnglists section [in module %s]"),
20254 objfile_name (objfile
));
20256 /* Validate that reading won't go beyond the end of the section. */
20257 if (start_offset
+ cu
->header
.offset_size
> rnglist_base
+ section
->size
)
20258 error (_("Reading DW_FORM_rnglistx index beyond end of"
20259 ".debug_rnglists section [in module %s]"),
20260 objfile_name (objfile
));
20262 const gdb_byte
*info_ptr
= section
->buffer
+ start_offset
;
20264 if (cu
->header
.offset_size
== 4)
20265 return read_4_bytes (abfd
, info_ptr
) + rnglist_base
;
20267 return read_8_bytes (abfd
, info_ptr
) + rnglist_base
;
20270 /* Process the attributes that had to be skipped in the first round. These
20271 attributes are the ones that need str_offsets_base or addr_base attributes.
20272 They could not have been processed in the first round, because at the time
20273 the values of str_offsets_base or addr_base may not have been known. */
20275 read_attribute_reprocess (const struct die_reader_specs
*reader
,
20276 struct attribute
*attr
, dwarf_tag tag
)
20278 struct dwarf2_cu
*cu
= reader
->cu
;
20279 switch (attr
->form
)
20281 case DW_FORM_addrx
:
20282 case DW_FORM_GNU_addr_index
:
20283 attr
->set_address (read_addr_index (cu
,
20284 attr
->as_unsigned_reprocess ()));
20286 case DW_FORM_loclistx
:
20287 attr
->set_address (read_loclist_index (cu
, attr
->as_unsigned ()));
20289 case DW_FORM_rnglistx
:
20290 attr
->set_address (read_rnglist_index (cu
, attr
->as_unsigned (), tag
));
20293 case DW_FORM_strx1
:
20294 case DW_FORM_strx2
:
20295 case DW_FORM_strx3
:
20296 case DW_FORM_strx4
:
20297 case DW_FORM_GNU_str_index
:
20299 unsigned int str_index
= attr
->as_unsigned_reprocess ();
20300 gdb_assert (!attr
->canonical_string_p ());
20301 if (reader
->dwo_file
!= NULL
)
20302 attr
->set_string_noncanonical (read_dwo_str_index (reader
,
20305 attr
->set_string_noncanonical (read_stub_str_index (cu
,
20310 gdb_assert_not_reached (_("Unexpected DWARF form."));
20314 /* Read an attribute value described by an attribute form. */
20316 static const gdb_byte
*
20317 read_attribute_value (const struct die_reader_specs
*reader
,
20318 struct attribute
*attr
, unsigned form
,
20319 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
20321 struct dwarf2_cu
*cu
= reader
->cu
;
20322 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
20323 struct objfile
*objfile
= per_objfile
->objfile
;
20324 bfd
*abfd
= reader
->abfd
;
20325 struct comp_unit_head
*cu_header
= &cu
->header
;
20326 unsigned int bytes_read
;
20327 struct dwarf_block
*blk
;
20329 attr
->form
= (enum dwarf_form
) form
;
20332 case DW_FORM_ref_addr
:
20333 if (cu
->header
.version
== 2)
20334 attr
->set_unsigned (cu
->header
.read_address (abfd
, info_ptr
,
20337 attr
->set_unsigned (cu
->header
.read_offset (abfd
, info_ptr
,
20339 info_ptr
+= bytes_read
;
20341 case DW_FORM_GNU_ref_alt
:
20342 attr
->set_unsigned (cu
->header
.read_offset (abfd
, info_ptr
,
20344 info_ptr
+= bytes_read
;
20348 struct gdbarch
*gdbarch
= objfile
->arch ();
20349 CORE_ADDR addr
= cu
->header
.read_address (abfd
, info_ptr
, &bytes_read
);
20350 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
);
20351 attr
->set_address (addr
);
20352 info_ptr
+= bytes_read
;
20355 case DW_FORM_block2
:
20356 blk
= dwarf_alloc_block (cu
);
20357 blk
->size
= read_2_bytes (abfd
, info_ptr
);
20359 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
20360 info_ptr
+= blk
->size
;
20361 attr
->set_block (blk
);
20363 case DW_FORM_block4
:
20364 blk
= dwarf_alloc_block (cu
);
20365 blk
->size
= read_4_bytes (abfd
, info_ptr
);
20367 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
20368 info_ptr
+= blk
->size
;
20369 attr
->set_block (blk
);
20371 case DW_FORM_data2
:
20372 attr
->set_unsigned (read_2_bytes (abfd
, info_ptr
));
20375 case DW_FORM_data4
:
20376 attr
->set_unsigned (read_4_bytes (abfd
, info_ptr
));
20379 case DW_FORM_data8
:
20380 attr
->set_unsigned (read_8_bytes (abfd
, info_ptr
));
20383 case DW_FORM_data16
:
20384 blk
= dwarf_alloc_block (cu
);
20386 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
20388 attr
->set_block (blk
);
20390 case DW_FORM_sec_offset
:
20391 attr
->set_unsigned (cu
->header
.read_offset (abfd
, info_ptr
,
20393 info_ptr
+= bytes_read
;
20395 case DW_FORM_loclistx
:
20397 attr
->set_unsigned_reprocess (read_unsigned_leb128 (abfd
, info_ptr
,
20399 info_ptr
+= bytes_read
;
20402 case DW_FORM_string
:
20403 attr
->set_string_noncanonical (read_direct_string (abfd
, info_ptr
,
20405 info_ptr
+= bytes_read
;
20408 if (!cu
->per_cu
->is_dwz
)
20410 attr
->set_string_noncanonical
20411 (read_indirect_string (per_objfile
,
20412 abfd
, info_ptr
, cu_header
,
20414 info_ptr
+= bytes_read
;
20418 case DW_FORM_line_strp
:
20419 if (!cu
->per_cu
->is_dwz
)
20421 attr
->set_string_noncanonical
20422 (per_objfile
->read_line_string (info_ptr
, cu_header
,
20424 info_ptr
+= bytes_read
;
20428 case DW_FORM_GNU_strp_alt
:
20430 dwz_file
*dwz
= dwarf2_get_dwz_file (per_objfile
->per_bfd
);
20431 LONGEST str_offset
= cu_header
->read_offset (abfd
, info_ptr
,
20434 attr
->set_string_noncanonical
20435 (dwz
->read_string (objfile
, str_offset
));
20436 info_ptr
+= bytes_read
;
20439 case DW_FORM_exprloc
:
20440 case DW_FORM_block
:
20441 blk
= dwarf_alloc_block (cu
);
20442 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
20443 info_ptr
+= bytes_read
;
20444 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
20445 info_ptr
+= blk
->size
;
20446 attr
->set_block (blk
);
20448 case DW_FORM_block1
:
20449 blk
= dwarf_alloc_block (cu
);
20450 blk
->size
= read_1_byte (abfd
, info_ptr
);
20452 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
20453 info_ptr
+= blk
->size
;
20454 attr
->set_block (blk
);
20456 case DW_FORM_data1
:
20458 attr
->set_unsigned (read_1_byte (abfd
, info_ptr
));
20461 case DW_FORM_flag_present
:
20462 attr
->set_unsigned (1);
20464 case DW_FORM_sdata
:
20465 attr
->set_signed (read_signed_leb128 (abfd
, info_ptr
, &bytes_read
));
20466 info_ptr
+= bytes_read
;
20468 case DW_FORM_rnglistx
:
20470 attr
->set_unsigned_reprocess (read_unsigned_leb128 (abfd
, info_ptr
,
20472 info_ptr
+= bytes_read
;
20475 case DW_FORM_udata
:
20476 attr
->set_unsigned (read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
20477 info_ptr
+= bytes_read
;
20480 attr
->set_unsigned ((to_underlying (cu
->header
.sect_off
)
20481 + read_1_byte (abfd
, info_ptr
)));
20485 attr
->set_unsigned ((to_underlying (cu
->header
.sect_off
)
20486 + read_2_bytes (abfd
, info_ptr
)));
20490 attr
->set_unsigned ((to_underlying (cu
->header
.sect_off
)
20491 + read_4_bytes (abfd
, info_ptr
)));
20495 attr
->set_unsigned ((to_underlying (cu
->header
.sect_off
)
20496 + read_8_bytes (abfd
, info_ptr
)));
20499 case DW_FORM_ref_sig8
:
20500 attr
->set_signature (read_8_bytes (abfd
, info_ptr
));
20503 case DW_FORM_ref_udata
:
20504 attr
->set_unsigned ((to_underlying (cu
->header
.sect_off
)
20505 + read_unsigned_leb128 (abfd
, info_ptr
,
20507 info_ptr
+= bytes_read
;
20509 case DW_FORM_indirect
:
20510 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
20511 info_ptr
+= bytes_read
;
20512 if (form
== DW_FORM_implicit_const
)
20514 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
20515 info_ptr
+= bytes_read
;
20517 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
20520 case DW_FORM_implicit_const
:
20521 attr
->set_signed (implicit_const
);
20523 case DW_FORM_addrx
:
20524 case DW_FORM_GNU_addr_index
:
20525 attr
->set_unsigned_reprocess (read_unsigned_leb128 (abfd
, info_ptr
,
20527 info_ptr
+= bytes_read
;
20530 case DW_FORM_strx1
:
20531 case DW_FORM_strx2
:
20532 case DW_FORM_strx3
:
20533 case DW_FORM_strx4
:
20534 case DW_FORM_GNU_str_index
:
20536 ULONGEST str_index
;
20537 if (form
== DW_FORM_strx1
)
20539 str_index
= read_1_byte (abfd
, info_ptr
);
20542 else if (form
== DW_FORM_strx2
)
20544 str_index
= read_2_bytes (abfd
, info_ptr
);
20547 else if (form
== DW_FORM_strx3
)
20549 str_index
= read_3_bytes (abfd
, info_ptr
);
20552 else if (form
== DW_FORM_strx4
)
20554 str_index
= read_4_bytes (abfd
, info_ptr
);
20559 str_index
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
20560 info_ptr
+= bytes_read
;
20562 attr
->set_unsigned_reprocess (str_index
);
20566 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
20567 dwarf_form_name (form
),
20568 bfd_get_filename (abfd
));
20572 if (cu
->per_cu
->is_dwz
&& attr
->form_is_ref ())
20573 attr
->form
= DW_FORM_GNU_ref_alt
;
20575 /* We have seen instances where the compiler tried to emit a byte
20576 size attribute of -1 which ended up being encoded as an unsigned
20577 0xffffffff. Although 0xffffffff is technically a valid size value,
20578 an object of this size seems pretty unlikely so we can relatively
20579 safely treat these cases as if the size attribute was invalid and
20580 treat them as zero by default. */
20581 if (attr
->name
== DW_AT_byte_size
20582 && form
== DW_FORM_data4
20583 && attr
->as_unsigned () >= 0xffffffff)
20586 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
20587 hex_string (attr
->as_unsigned ()));
20588 attr
->set_unsigned (0);
20594 /* Read an attribute described by an abbreviated attribute. */
20596 static const gdb_byte
*
20597 read_attribute (const struct die_reader_specs
*reader
,
20598 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
20599 const gdb_byte
*info_ptr
)
20601 attr
->name
= abbrev
->name
;
20602 attr
->string_is_canonical
= 0;
20603 attr
->requires_reprocessing
= 0;
20604 return read_attribute_value (reader
, attr
, abbrev
->form
,
20605 abbrev
->implicit_const
, info_ptr
);
20608 /* Return pointer to string at .debug_str offset STR_OFFSET. */
20610 static const char *
20611 read_indirect_string_at_offset (dwarf2_per_objfile
*per_objfile
,
20612 LONGEST str_offset
)
20614 return per_objfile
->per_bfd
->str
.read_string (per_objfile
->objfile
,
20615 str_offset
, "DW_FORM_strp");
20618 /* Return pointer to string at .debug_str offset as read from BUF.
20619 BUF is assumed to be in a compilation unit described by CU_HEADER.
20620 Return *BYTES_READ_PTR count of bytes read from BUF. */
20622 static const char *
20623 read_indirect_string (dwarf2_per_objfile
*per_objfile
, bfd
*abfd
,
20624 const gdb_byte
*buf
,
20625 const struct comp_unit_head
*cu_header
,
20626 unsigned int *bytes_read_ptr
)
20628 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
20630 return read_indirect_string_at_offset (per_objfile
, str_offset
);
20636 dwarf2_per_objfile::read_line_string (const gdb_byte
*buf
,
20637 const struct comp_unit_head
*cu_header
,
20638 unsigned int *bytes_read_ptr
)
20640 bfd
*abfd
= objfile
->obfd
;
20641 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
20643 return per_bfd
->line_str
.read_string (objfile
, str_offset
, "DW_FORM_line_strp");
20646 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
20647 ADDR_BASE is the DW_AT_addr_base (DW_AT_GNU_addr_base) attribute or zero.
20648 ADDR_SIZE is the size of addresses from the CU header. */
20651 read_addr_index_1 (dwarf2_per_objfile
*per_objfile
, unsigned int addr_index
,
20652 gdb::optional
<ULONGEST
> addr_base
, int addr_size
)
20654 struct objfile
*objfile
= per_objfile
->objfile
;
20655 bfd
*abfd
= objfile
->obfd
;
20656 const gdb_byte
*info_ptr
;
20657 ULONGEST addr_base_or_zero
= addr_base
.has_value () ? *addr_base
: 0;
20659 per_objfile
->per_bfd
->addr
.read (objfile
);
20660 if (per_objfile
->per_bfd
->addr
.buffer
== NULL
)
20661 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
20662 objfile_name (objfile
));
20663 if (addr_base_or_zero
+ addr_index
* addr_size
20664 >= per_objfile
->per_bfd
->addr
.size
)
20665 error (_("DW_FORM_addr_index pointing outside of "
20666 ".debug_addr section [in module %s]"),
20667 objfile_name (objfile
));
20668 info_ptr
= (per_objfile
->per_bfd
->addr
.buffer
+ addr_base_or_zero
20669 + addr_index
* addr_size
);
20670 if (addr_size
== 4)
20671 return bfd_get_32 (abfd
, info_ptr
);
20673 return bfd_get_64 (abfd
, info_ptr
);
20676 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
20679 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
20681 return read_addr_index_1 (cu
->per_objfile
, addr_index
,
20682 cu
->addr_base
, cu
->header
.addr_size
);
20685 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
20688 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
20689 unsigned int *bytes_read
)
20691 bfd
*abfd
= cu
->per_objfile
->objfile
->obfd
;
20692 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
20694 return read_addr_index (cu
, addr_index
);
20700 dwarf2_read_addr_index (dwarf2_per_cu_data
*per_cu
,
20701 dwarf2_per_objfile
*per_objfile
,
20702 unsigned int addr_index
)
20704 struct dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
20705 gdb::optional
<ULONGEST
> addr_base
;
20708 /* We need addr_base and addr_size.
20709 If we don't have PER_CU->cu, we have to get it.
20710 Nasty, but the alternative is storing the needed info in PER_CU,
20711 which at this point doesn't seem justified: it's not clear how frequently
20712 it would get used and it would increase the size of every PER_CU.
20713 Entry points like dwarf2_per_cu_addr_size do a similar thing
20714 so we're not in uncharted territory here.
20715 Alas we need to be a bit more complicated as addr_base is contained
20718 We don't need to read the entire CU(/TU).
20719 We just need the header and top level die.
20721 IWBN to use the aging mechanism to let us lazily later discard the CU.
20722 For now we skip this optimization. */
20726 addr_base
= cu
->addr_base
;
20727 addr_size
= cu
->header
.addr_size
;
20731 cutu_reader
reader (per_cu
, per_objfile
, nullptr, nullptr, false);
20732 addr_base
= reader
.cu
->addr_base
;
20733 addr_size
= reader
.cu
->header
.addr_size
;
20736 return read_addr_index_1 (per_objfile
, addr_index
, addr_base
, addr_size
);
20739 /* Given a DW_FORM_GNU_str_index value STR_INDEX, fetch the string.
20740 STR_SECTION, STR_OFFSETS_SECTION can be from a Fission stub or a
20743 static const char *
20744 read_str_index (struct dwarf2_cu
*cu
,
20745 struct dwarf2_section_info
*str_section
,
20746 struct dwarf2_section_info
*str_offsets_section
,
20747 ULONGEST str_offsets_base
, ULONGEST str_index
)
20749 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
20750 struct objfile
*objfile
= per_objfile
->objfile
;
20751 const char *objf_name
= objfile_name (objfile
);
20752 bfd
*abfd
= objfile
->obfd
;
20753 const gdb_byte
*info_ptr
;
20754 ULONGEST str_offset
;
20755 static const char form_name
[] = "DW_FORM_GNU_str_index or DW_FORM_strx";
20757 str_section
->read (objfile
);
20758 str_offsets_section
->read (objfile
);
20759 if (str_section
->buffer
== NULL
)
20760 error (_("%s used without %s section"
20761 " in CU at offset %s [in module %s]"),
20762 form_name
, str_section
->get_name (),
20763 sect_offset_str (cu
->header
.sect_off
), objf_name
);
20764 if (str_offsets_section
->buffer
== NULL
)
20765 error (_("%s used without %s section"
20766 " in CU at offset %s [in module %s]"),
20767 form_name
, str_section
->get_name (),
20768 sect_offset_str (cu
->header
.sect_off
), objf_name
);
20769 info_ptr
= (str_offsets_section
->buffer
20771 + str_index
* cu
->header
.offset_size
);
20772 if (cu
->header
.offset_size
== 4)
20773 str_offset
= bfd_get_32 (abfd
, info_ptr
);
20775 str_offset
= bfd_get_64 (abfd
, info_ptr
);
20776 if (str_offset
>= str_section
->size
)
20777 error (_("Offset from %s pointing outside of"
20778 " .debug_str.dwo section in CU at offset %s [in module %s]"),
20779 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
20780 return (const char *) (str_section
->buffer
+ str_offset
);
20783 /* Given a DW_FORM_GNU_str_index from a DWO file, fetch the string. */
20785 static const char *
20786 read_dwo_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
20788 ULONGEST str_offsets_base
= reader
->cu
->header
.version
>= 5
20789 ? reader
->cu
->header
.addr_size
: 0;
20790 return read_str_index (reader
->cu
,
20791 &reader
->dwo_file
->sections
.str
,
20792 &reader
->dwo_file
->sections
.str_offsets
,
20793 str_offsets_base
, str_index
);
20796 /* Given a DW_FORM_GNU_str_index from a Fission stub, fetch the string. */
20798 static const char *
20799 read_stub_str_index (struct dwarf2_cu
*cu
, ULONGEST str_index
)
20801 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
20802 const char *objf_name
= objfile_name (objfile
);
20803 static const char form_name
[] = "DW_FORM_GNU_str_index";
20804 static const char str_offsets_attr_name
[] = "DW_AT_str_offsets";
20806 if (!cu
->str_offsets_base
.has_value ())
20807 error (_("%s used in Fission stub without %s"
20808 " in CU at offset 0x%lx [in module %s]"),
20809 form_name
, str_offsets_attr_name
,
20810 (long) cu
->header
.offset_size
, objf_name
);
20812 return read_str_index (cu
,
20813 &cu
->per_objfile
->per_bfd
->str
,
20814 &cu
->per_objfile
->per_bfd
->str_offsets
,
20815 *cu
->str_offsets_base
, str_index
);
20818 /* Return the length of an LEB128 number in BUF. */
20821 leb128_size (const gdb_byte
*buf
)
20823 const gdb_byte
*begin
= buf
;
20829 if ((byte
& 128) == 0)
20830 return buf
- begin
;
20835 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
20844 cu
->language
= language_c
;
20847 case DW_LANG_C_plus_plus
:
20848 case DW_LANG_C_plus_plus_11
:
20849 case DW_LANG_C_plus_plus_14
:
20850 cu
->language
= language_cplus
;
20853 cu
->language
= language_d
;
20855 case DW_LANG_Fortran77
:
20856 case DW_LANG_Fortran90
:
20857 case DW_LANG_Fortran95
:
20858 case DW_LANG_Fortran03
:
20859 case DW_LANG_Fortran08
:
20860 cu
->language
= language_fortran
;
20863 cu
->language
= language_go
;
20865 case DW_LANG_Mips_Assembler
:
20866 cu
->language
= language_asm
;
20868 case DW_LANG_Ada83
:
20869 case DW_LANG_Ada95
:
20870 cu
->language
= language_ada
;
20872 case DW_LANG_Modula2
:
20873 cu
->language
= language_m2
;
20875 case DW_LANG_Pascal83
:
20876 cu
->language
= language_pascal
;
20879 cu
->language
= language_objc
;
20882 case DW_LANG_Rust_old
:
20883 cu
->language
= language_rust
;
20885 case DW_LANG_Cobol74
:
20886 case DW_LANG_Cobol85
:
20888 cu
->language
= language_minimal
;
20891 cu
->language_defn
= language_def (cu
->language
);
20894 /* Return the named attribute or NULL if not there. */
20896 static struct attribute
*
20897 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
20902 struct attribute
*spec
= NULL
;
20904 for (i
= 0; i
< die
->num_attrs
; ++i
)
20906 if (die
->attrs
[i
].name
== name
)
20907 return &die
->attrs
[i
];
20908 if (die
->attrs
[i
].name
== DW_AT_specification
20909 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
20910 spec
= &die
->attrs
[i
];
20916 die
= follow_die_ref (die
, spec
, &cu
);
20922 /* Return the string associated with a string-typed attribute, or NULL if it
20923 is either not found or is of an incorrect type. */
20925 static const char *
20926 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
20928 struct attribute
*attr
;
20929 const char *str
= NULL
;
20931 attr
= dwarf2_attr (die
, name
, cu
);
20935 str
= attr
->as_string ();
20936 if (str
== nullptr)
20937 complaint (_("string type expected for attribute %s for "
20938 "DIE at %s in module %s"),
20939 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
20940 objfile_name (cu
->per_objfile
->objfile
));
20946 /* Return the dwo name or NULL if not present. If present, it is in either
20947 DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */
20948 static const char *
20949 dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
20951 const char *dwo_name
= dwarf2_string_attr (die
, DW_AT_GNU_dwo_name
, cu
);
20952 if (dwo_name
== nullptr)
20953 dwo_name
= dwarf2_string_attr (die
, DW_AT_dwo_name
, cu
);
20957 /* Return non-zero iff the attribute NAME is defined for the given DIE,
20958 and holds a non-zero value. This function should only be used for
20959 DW_FORM_flag or DW_FORM_flag_present attributes. */
20962 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
20964 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
20966 return attr
!= nullptr && attr
->as_boolean ();
20970 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
20972 /* A DIE is a declaration if it has a DW_AT_declaration attribute
20973 which value is non-zero. However, we have to be careful with
20974 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
20975 (via dwarf2_flag_true_p) follows this attribute. So we may
20976 end up accidently finding a declaration attribute that belongs
20977 to a different DIE referenced by the specification attribute,
20978 even though the given DIE does not have a declaration attribute. */
20979 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
20980 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
20983 /* Return the die giving the specification for DIE, if there is
20984 one. *SPEC_CU is the CU containing DIE on input, and the CU
20985 containing the return value on output. If there is no
20986 specification, but there is an abstract origin, that is
20989 static struct die_info
*
20990 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
20992 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
20995 if (spec_attr
== NULL
)
20996 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
20998 if (spec_attr
== NULL
)
21001 return follow_die_ref (die
, spec_attr
, spec_cu
);
21004 /* Stub for free_line_header to match void * callback types. */
21007 free_line_header_voidp (void *arg
)
21009 struct line_header
*lh
= (struct line_header
*) arg
;
21014 /* A convenience function to find the proper .debug_line section for a CU. */
21016 static struct dwarf2_section_info
*
21017 get_debug_line_section (struct dwarf2_cu
*cu
)
21019 struct dwarf2_section_info
*section
;
21020 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
21022 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
21024 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
21025 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
21026 else if (cu
->per_cu
->is_dwz
)
21028 dwz_file
*dwz
= dwarf2_get_dwz_file (per_objfile
->per_bfd
);
21030 section
= &dwz
->line
;
21033 section
= &per_objfile
->per_bfd
->line
;
21038 /* Read the statement program header starting at OFFSET in
21039 .debug_line, or .debug_line.dwo. Return a pointer
21040 to a struct line_header, allocated using xmalloc.
21041 Returns NULL if there is a problem reading the header, e.g., if it
21042 has a version we don't understand.
21044 NOTE: the strings in the include directory and file name tables of
21045 the returned object point into the dwarf line section buffer,
21046 and must not be freed. */
21048 static line_header_up
21049 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
21051 struct dwarf2_section_info
*section
;
21052 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
21054 section
= get_debug_line_section (cu
);
21055 section
->read (per_objfile
->objfile
);
21056 if (section
->buffer
== NULL
)
21058 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
21059 complaint (_("missing .debug_line.dwo section"));
21061 complaint (_("missing .debug_line section"));
21065 return dwarf_decode_line_header (sect_off
, cu
->per_cu
->is_dwz
,
21066 per_objfile
, section
, &cu
->header
);
21069 /* Subroutine of dwarf_decode_lines to simplify it.
21070 Return the file name of the psymtab for the given file_entry.
21071 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
21072 If space for the result is malloc'd, *NAME_HOLDER will be set.
21073 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
21075 static const char *
21076 psymtab_include_file_name (const struct line_header
*lh
, const file_entry
&fe
,
21077 const dwarf2_psymtab
*pst
,
21078 const char *comp_dir
,
21079 gdb::unique_xmalloc_ptr
<char> *name_holder
)
21081 const char *include_name
= fe
.name
;
21082 const char *include_name_to_compare
= include_name
;
21083 const char *pst_filename
;
21086 const char *dir_name
= fe
.include_dir (lh
);
21088 gdb::unique_xmalloc_ptr
<char> hold_compare
;
21089 if (!IS_ABSOLUTE_PATH (include_name
)
21090 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
21092 /* Avoid creating a duplicate psymtab for PST.
21093 We do this by comparing INCLUDE_NAME and PST_FILENAME.
21094 Before we do the comparison, however, we need to account
21095 for DIR_NAME and COMP_DIR.
21096 First prepend dir_name (if non-NULL). If we still don't
21097 have an absolute path prepend comp_dir (if non-NULL).
21098 However, the directory we record in the include-file's
21099 psymtab does not contain COMP_DIR (to match the
21100 corresponding symtab(s)).
21105 bash$ gcc -g ./hello.c
21106 include_name = "hello.c"
21108 DW_AT_comp_dir = comp_dir = "/tmp"
21109 DW_AT_name = "./hello.c"
21113 if (dir_name
!= NULL
)
21115 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
21116 include_name
, (char *) NULL
));
21117 include_name
= name_holder
->get ();
21118 include_name_to_compare
= include_name
;
21120 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
21122 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
21123 include_name
, (char *) NULL
));
21124 include_name_to_compare
= hold_compare
.get ();
21128 pst_filename
= pst
->filename
;
21129 gdb::unique_xmalloc_ptr
<char> copied_name
;
21130 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
21132 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
21133 pst_filename
, (char *) NULL
));
21134 pst_filename
= copied_name
.get ();
21137 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
21141 return include_name
;
21144 /* State machine to track the state of the line number program. */
21146 class lnp_state_machine
21149 /* Initialize a machine state for the start of a line number
21151 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
21152 bool record_lines_p
);
21154 file_entry
*current_file ()
21156 /* lh->file_names is 0-based, but the file name numbers in the
21157 statement program are 1-based. */
21158 return m_line_header
->file_name_at (m_file
);
21161 /* Record the line in the state machine. END_SEQUENCE is true if
21162 we're processing the end of a sequence. */
21163 void record_line (bool end_sequence
);
21165 /* Check ADDRESS is -1, or zero and less than UNRELOCATED_LOWPC, and if true
21166 nop-out rest of the lines in this sequence. */
21167 void check_line_address (struct dwarf2_cu
*cu
,
21168 const gdb_byte
*line_ptr
,
21169 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
21171 void handle_set_discriminator (unsigned int discriminator
)
21173 m_discriminator
= discriminator
;
21174 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
21177 /* Handle DW_LNE_set_address. */
21178 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
21181 address
+= baseaddr
;
21182 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
21185 /* Handle DW_LNS_advance_pc. */
21186 void handle_advance_pc (CORE_ADDR adjust
);
21188 /* Handle a special opcode. */
21189 void handle_special_opcode (unsigned char op_code
);
21191 /* Handle DW_LNS_advance_line. */
21192 void handle_advance_line (int line_delta
)
21194 advance_line (line_delta
);
21197 /* Handle DW_LNS_set_file. */
21198 void handle_set_file (file_name_index file
);
21200 /* Handle DW_LNS_negate_stmt. */
21201 void handle_negate_stmt ()
21203 m_is_stmt
= !m_is_stmt
;
21206 /* Handle DW_LNS_const_add_pc. */
21207 void handle_const_add_pc ();
21209 /* Handle DW_LNS_fixed_advance_pc. */
21210 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
21212 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
21216 /* Handle DW_LNS_copy. */
21217 void handle_copy ()
21219 record_line (false);
21220 m_discriminator
= 0;
21223 /* Handle DW_LNE_end_sequence. */
21224 void handle_end_sequence ()
21226 m_currently_recording_lines
= true;
21230 /* Advance the line by LINE_DELTA. */
21231 void advance_line (int line_delta
)
21233 m_line
+= line_delta
;
21235 if (line_delta
!= 0)
21236 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
21239 struct dwarf2_cu
*m_cu
;
21241 gdbarch
*m_gdbarch
;
21243 /* True if we're recording lines.
21244 Otherwise we're building partial symtabs and are just interested in
21245 finding include files mentioned by the line number program. */
21246 bool m_record_lines_p
;
21248 /* The line number header. */
21249 line_header
*m_line_header
;
21251 /* These are part of the standard DWARF line number state machine,
21252 and initialized according to the DWARF spec. */
21254 unsigned char m_op_index
= 0;
21255 /* The line table index of the current file. */
21256 file_name_index m_file
= 1;
21257 unsigned int m_line
= 1;
21259 /* These are initialized in the constructor. */
21261 CORE_ADDR m_address
;
21263 unsigned int m_discriminator
;
21265 /* Additional bits of state we need to track. */
21267 /* The last file that we called dwarf2_start_subfile for.
21268 This is only used for TLLs. */
21269 unsigned int m_last_file
= 0;
21270 /* The last file a line number was recorded for. */
21271 struct subfile
*m_last_subfile
= NULL
;
21273 /* The address of the last line entry. */
21274 CORE_ADDR m_last_address
;
21276 /* Set to true when a previous line at the same address (using
21277 m_last_address) had m_is_stmt true. This is reset to false when a
21278 line entry at a new address (m_address different to m_last_address) is
21280 bool m_stmt_at_address
= false;
21282 /* When true, record the lines we decode. */
21283 bool m_currently_recording_lines
= false;
21285 /* The last line number that was recorded, used to coalesce
21286 consecutive entries for the same line. This can happen, for
21287 example, when discriminators are present. PR 17276. */
21288 unsigned int m_last_line
= 0;
21289 bool m_line_has_non_zero_discriminator
= false;
21293 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
21295 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
21296 / m_line_header
->maximum_ops_per_instruction
)
21297 * m_line_header
->minimum_instruction_length
);
21298 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
21299 m_op_index
= ((m_op_index
+ adjust
)
21300 % m_line_header
->maximum_ops_per_instruction
);
21304 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
21306 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
21307 unsigned char adj_opcode_d
= adj_opcode
/ m_line_header
->line_range
;
21308 unsigned char adj_opcode_r
= adj_opcode
% m_line_header
->line_range
;
21309 CORE_ADDR addr_adj
= (((m_op_index
+ adj_opcode_d
)
21310 / m_line_header
->maximum_ops_per_instruction
)
21311 * m_line_header
->minimum_instruction_length
);
21312 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
21313 m_op_index
= ((m_op_index
+ adj_opcode_d
)
21314 % m_line_header
->maximum_ops_per_instruction
);
21316 int line_delta
= m_line_header
->line_base
+ adj_opcode_r
;
21317 advance_line (line_delta
);
21318 record_line (false);
21319 m_discriminator
= 0;
21323 lnp_state_machine::handle_set_file (file_name_index file
)
21327 const file_entry
*fe
= current_file ();
21329 dwarf2_debug_line_missing_file_complaint ();
21330 else if (m_record_lines_p
)
21332 const char *dir
= fe
->include_dir (m_line_header
);
21334 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
21335 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
21336 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
21341 lnp_state_machine::handle_const_add_pc ()
21344 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
21347 = (((m_op_index
+ adjust
)
21348 / m_line_header
->maximum_ops_per_instruction
)
21349 * m_line_header
->minimum_instruction_length
);
21351 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
21352 m_op_index
= ((m_op_index
+ adjust
)
21353 % m_line_header
->maximum_ops_per_instruction
);
21356 /* Return non-zero if we should add LINE to the line number table.
21357 LINE is the line to add, LAST_LINE is the last line that was added,
21358 LAST_SUBFILE is the subfile for LAST_LINE.
21359 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
21360 had a non-zero discriminator.
21362 We have to be careful in the presence of discriminators.
21363 E.g., for this line:
21365 for (i = 0; i < 100000; i++);
21367 clang can emit four line number entries for that one line,
21368 each with a different discriminator.
21369 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
21371 However, we want gdb to coalesce all four entries into one.
21372 Otherwise the user could stepi into the middle of the line and
21373 gdb would get confused about whether the pc really was in the
21374 middle of the line.
21376 Things are further complicated by the fact that two consecutive
21377 line number entries for the same line is a heuristic used by gcc
21378 to denote the end of the prologue. So we can't just discard duplicate
21379 entries, we have to be selective about it. The heuristic we use is
21380 that we only collapse consecutive entries for the same line if at least
21381 one of those entries has a non-zero discriminator. PR 17276.
21383 Note: Addresses in the line number state machine can never go backwards
21384 within one sequence, thus this coalescing is ok. */
21387 dwarf_record_line_p (struct dwarf2_cu
*cu
,
21388 unsigned int line
, unsigned int last_line
,
21389 int line_has_non_zero_discriminator
,
21390 struct subfile
*last_subfile
)
21392 if (cu
->get_builder ()->get_current_subfile () != last_subfile
)
21394 if (line
!= last_line
)
21396 /* Same line for the same file that we've seen already.
21397 As a last check, for pr 17276, only record the line if the line
21398 has never had a non-zero discriminator. */
21399 if (!line_has_non_zero_discriminator
)
21404 /* Use the CU's builder to record line number LINE beginning at
21405 address ADDRESS in the line table of subfile SUBFILE. */
21408 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
21409 unsigned int line
, CORE_ADDR address
, bool is_stmt
,
21410 struct dwarf2_cu
*cu
)
21412 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
21414 if (dwarf_line_debug
)
21416 fprintf_unfiltered (gdb_stdlog
,
21417 "Recording line %u, file %s, address %s\n",
21418 line
, lbasename (subfile
->name
),
21419 paddress (gdbarch
, address
));
21423 cu
->get_builder ()->record_line (subfile
, line
, addr
, is_stmt
);
21426 /* Subroutine of dwarf_decode_lines_1 to simplify it.
21427 Mark the end of a set of line number records.
21428 The arguments are the same as for dwarf_record_line_1.
21429 If SUBFILE is NULL the request is ignored. */
21432 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
21433 CORE_ADDR address
, struct dwarf2_cu
*cu
)
21435 if (subfile
== NULL
)
21438 if (dwarf_line_debug
)
21440 fprintf_unfiltered (gdb_stdlog
,
21441 "Finishing current line, file %s, address %s\n",
21442 lbasename (subfile
->name
),
21443 paddress (gdbarch
, address
));
21446 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, true, cu
);
21450 lnp_state_machine::record_line (bool end_sequence
)
21452 if (dwarf_line_debug
)
21454 fprintf_unfiltered (gdb_stdlog
,
21455 "Processing actual line %u: file %u,"
21456 " address %s, is_stmt %u, discrim %u%s\n",
21458 paddress (m_gdbarch
, m_address
),
21459 m_is_stmt
, m_discriminator
,
21460 (end_sequence
? "\t(end sequence)" : ""));
21463 file_entry
*fe
= current_file ();
21466 dwarf2_debug_line_missing_file_complaint ();
21467 /* For now we ignore lines not starting on an instruction boundary.
21468 But not when processing end_sequence for compatibility with the
21469 previous version of the code. */
21470 else if (m_op_index
== 0 || end_sequence
)
21472 fe
->included_p
= 1;
21473 if (m_record_lines_p
)
21475 /* When we switch files we insert an end maker in the first file,
21476 switch to the second file and add a new line entry. The
21477 problem is that the end marker inserted in the first file will
21478 discard any previous line entries at the same address. If the
21479 line entries in the first file are marked as is-stmt, while
21480 the new line in the second file is non-stmt, then this means
21481 the end marker will discard is-stmt lines so we can have a
21482 non-stmt line. This means that there are less addresses at
21483 which the user can insert a breakpoint.
21485 To improve this we track the last address in m_last_address,
21486 and whether we have seen an is-stmt at this address. Then
21487 when switching files, if we have seen a stmt at the current
21488 address, and we are switching to create a non-stmt line, then
21489 discard the new line. */
21491 = m_last_subfile
!= m_cu
->get_builder ()->get_current_subfile ();
21492 bool ignore_this_line
21493 = ((file_changed
&& !end_sequence
&& m_last_address
== m_address
21494 && !m_is_stmt
&& m_stmt_at_address
)
21495 || (!end_sequence
&& m_line
== 0));
21497 if ((file_changed
&& !ignore_this_line
) || end_sequence
)
21499 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
21500 m_currently_recording_lines
? m_cu
: nullptr);
21503 if (!end_sequence
&& !ignore_this_line
)
21505 bool is_stmt
= producer_is_codewarrior (m_cu
) || m_is_stmt
;
21507 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
21508 m_line_has_non_zero_discriminator
,
21511 buildsym_compunit
*builder
= m_cu
->get_builder ();
21512 dwarf_record_line_1 (m_gdbarch
,
21513 builder
->get_current_subfile (),
21514 m_line
, m_address
, is_stmt
,
21515 m_currently_recording_lines
? m_cu
: nullptr);
21517 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
21518 m_last_line
= m_line
;
21523 /* Track whether we have seen any m_is_stmt true at m_address in case we
21524 have multiple line table entries all at m_address. */
21525 if (m_last_address
!= m_address
)
21527 m_stmt_at_address
= false;
21528 m_last_address
= m_address
;
21530 m_stmt_at_address
|= m_is_stmt
;
21533 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
21534 line_header
*lh
, bool record_lines_p
)
21538 m_record_lines_p
= record_lines_p
;
21539 m_line_header
= lh
;
21541 m_currently_recording_lines
= true;
21543 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
21544 was a line entry for it so that the backend has a chance to adjust it
21545 and also record it in case it needs it. This is currently used by MIPS
21546 code, cf. `mips_adjust_dwarf2_line'. */
21547 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
21548 m_is_stmt
= lh
->default_is_stmt
;
21549 m_discriminator
= 0;
21551 m_last_address
= m_address
;
21552 m_stmt_at_address
= false;
21556 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
21557 const gdb_byte
*line_ptr
,
21558 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
21560 /* Linkers resolve a symbolic relocation referencing a GC'd function to 0 or
21561 -1. If ADDRESS is 0, ignoring the opcode will err if the text section is
21562 located at 0x0. In this case, additionally check that if
21563 ADDRESS < UNRELOCATED_LOWPC. */
21565 if ((address
== 0 && address
< unrelocated_lowpc
)
21566 || address
== (CORE_ADDR
) -1)
21568 /* This line table is for a function which has been
21569 GCd by the linker. Ignore it. PR gdb/12528 */
21571 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21572 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
21574 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
21575 line_offset
, objfile_name (objfile
));
21576 m_currently_recording_lines
= false;
21577 /* Note: m_currently_recording_lines is left as false until we see
21578 DW_LNE_end_sequence. */
21582 /* Subroutine of dwarf_decode_lines to simplify it.
21583 Process the line number information in LH.
21584 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
21585 program in order to set included_p for every referenced header. */
21588 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
21589 const int decode_for_pst_p
, CORE_ADDR lowpc
)
21591 const gdb_byte
*line_ptr
, *extended_end
;
21592 const gdb_byte
*line_end
;
21593 unsigned int bytes_read
, extended_len
;
21594 unsigned char op_code
, extended_op
;
21595 CORE_ADDR baseaddr
;
21596 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21597 bfd
*abfd
= objfile
->obfd
;
21598 struct gdbarch
*gdbarch
= objfile
->arch ();
21599 /* True if we're recording line info (as opposed to building partial
21600 symtabs and just interested in finding include files mentioned by
21601 the line number program). */
21602 bool record_lines_p
= !decode_for_pst_p
;
21604 baseaddr
= objfile
->text_section_offset ();
21606 line_ptr
= lh
->statement_program_start
;
21607 line_end
= lh
->statement_program_end
;
21609 /* Read the statement sequences until there's nothing left. */
21610 while (line_ptr
< line_end
)
21612 /* The DWARF line number program state machine. Reset the state
21613 machine at the start of each sequence. */
21614 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
21615 bool end_sequence
= false;
21617 if (record_lines_p
)
21619 /* Start a subfile for the current file of the state
21621 const file_entry
*fe
= state_machine
.current_file ();
21624 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
21627 /* Decode the table. */
21628 while (line_ptr
< line_end
&& !end_sequence
)
21630 op_code
= read_1_byte (abfd
, line_ptr
);
21633 if (op_code
>= lh
->opcode_base
)
21635 /* Special opcode. */
21636 state_machine
.handle_special_opcode (op_code
);
21638 else switch (op_code
)
21640 case DW_LNS_extended_op
:
21641 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
21643 line_ptr
+= bytes_read
;
21644 extended_end
= line_ptr
+ extended_len
;
21645 extended_op
= read_1_byte (abfd
, line_ptr
);
21647 if (DW_LNE_lo_user
<= extended_op
21648 && extended_op
<= DW_LNE_hi_user
)
21650 /* Vendor extension, ignore. */
21651 line_ptr
= extended_end
;
21654 switch (extended_op
)
21656 case DW_LNE_end_sequence
:
21657 state_machine
.handle_end_sequence ();
21658 end_sequence
= true;
21660 case DW_LNE_set_address
:
21663 = cu
->header
.read_address (abfd
, line_ptr
, &bytes_read
);
21664 line_ptr
+= bytes_read
;
21666 state_machine
.check_line_address (cu
, line_ptr
,
21667 lowpc
- baseaddr
, address
);
21668 state_machine
.handle_set_address (baseaddr
, address
);
21671 case DW_LNE_define_file
:
21673 const char *cur_file
;
21674 unsigned int mod_time
, length
;
21677 cur_file
= read_direct_string (abfd
, line_ptr
,
21679 line_ptr
+= bytes_read
;
21680 dindex
= (dir_index
)
21681 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21682 line_ptr
+= bytes_read
;
21684 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21685 line_ptr
+= bytes_read
;
21687 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21688 line_ptr
+= bytes_read
;
21689 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
21692 case DW_LNE_set_discriminator
:
21694 /* The discriminator is not interesting to the
21695 debugger; just ignore it. We still need to
21696 check its value though:
21697 if there are consecutive entries for the same
21698 (non-prologue) line we want to coalesce them.
21701 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21702 line_ptr
+= bytes_read
;
21704 state_machine
.handle_set_discriminator (discr
);
21708 complaint (_("mangled .debug_line section"));
21711 /* Make sure that we parsed the extended op correctly. If e.g.
21712 we expected a different address size than the producer used,
21713 we may have read the wrong number of bytes. */
21714 if (line_ptr
!= extended_end
)
21716 complaint (_("mangled .debug_line section"));
21721 state_machine
.handle_copy ();
21723 case DW_LNS_advance_pc
:
21726 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21727 line_ptr
+= bytes_read
;
21729 state_machine
.handle_advance_pc (adjust
);
21732 case DW_LNS_advance_line
:
21735 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
21736 line_ptr
+= bytes_read
;
21738 state_machine
.handle_advance_line (line_delta
);
21741 case DW_LNS_set_file
:
21743 file_name_index file
21744 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
21746 line_ptr
+= bytes_read
;
21748 state_machine
.handle_set_file (file
);
21751 case DW_LNS_set_column
:
21752 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21753 line_ptr
+= bytes_read
;
21755 case DW_LNS_negate_stmt
:
21756 state_machine
.handle_negate_stmt ();
21758 case DW_LNS_set_basic_block
:
21760 /* Add to the address register of the state machine the
21761 address increment value corresponding to special opcode
21762 255. I.e., this value is scaled by the minimum
21763 instruction length since special opcode 255 would have
21764 scaled the increment. */
21765 case DW_LNS_const_add_pc
:
21766 state_machine
.handle_const_add_pc ();
21768 case DW_LNS_fixed_advance_pc
:
21770 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
21773 state_machine
.handle_fixed_advance_pc (addr_adj
);
21778 /* Unknown standard opcode, ignore it. */
21781 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
21783 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21784 line_ptr
+= bytes_read
;
21791 dwarf2_debug_line_missing_end_sequence_complaint ();
21793 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
21794 in which case we still finish recording the last line). */
21795 state_machine
.record_line (true);
21799 /* Decode the Line Number Program (LNP) for the given line_header
21800 structure and CU. The actual information extracted and the type
21801 of structures created from the LNP depends on the value of PST.
21803 1. If PST is NULL, then this procedure uses the data from the program
21804 to create all necessary symbol tables, and their linetables.
21806 2. If PST is not NULL, this procedure reads the program to determine
21807 the list of files included by the unit represented by PST, and
21808 builds all the associated partial symbol tables.
21810 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
21811 It is used for relative paths in the line table.
21812 NOTE: When processing partial symtabs (pst != NULL),
21813 comp_dir == pst->dirname.
21815 NOTE: It is important that psymtabs have the same file name (via strcmp)
21816 as the corresponding symtab. Since COMP_DIR is not used in the name of the
21817 symtab we don't use it in the name of the psymtabs we create.
21818 E.g. expand_line_sal requires this when finding psymtabs to expand.
21819 A good testcase for this is mb-inline.exp.
21821 LOWPC is the lowest address in CU (or 0 if not known).
21823 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
21824 for its PC<->lines mapping information. Otherwise only the filename
21825 table is read in. */
21828 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
21829 struct dwarf2_cu
*cu
, dwarf2_psymtab
*pst
,
21830 CORE_ADDR lowpc
, int decode_mapping
)
21832 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21833 const int decode_for_pst_p
= (pst
!= NULL
);
21835 if (decode_mapping
)
21836 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
21838 if (decode_for_pst_p
)
21840 /* Now that we're done scanning the Line Header Program, we can
21841 create the psymtab of each included file. */
21842 for (auto &file_entry
: lh
->file_names ())
21843 if (file_entry
.included_p
== 1)
21845 gdb::unique_xmalloc_ptr
<char> name_holder
;
21846 const char *include_name
=
21847 psymtab_include_file_name (lh
, file_entry
, pst
,
21848 comp_dir
, &name_holder
);
21849 if (include_name
!= NULL
)
21850 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
21855 /* Make sure a symtab is created for every file, even files
21856 which contain only variables (i.e. no code with associated
21858 buildsym_compunit
*builder
= cu
->get_builder ();
21859 struct compunit_symtab
*cust
= builder
->get_compunit_symtab ();
21861 for (auto &fe
: lh
->file_names ())
21863 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
21864 if (builder
->get_current_subfile ()->symtab
== NULL
)
21866 builder
->get_current_subfile ()->symtab
21867 = allocate_symtab (cust
,
21868 builder
->get_current_subfile ()->name
);
21870 fe
.symtab
= builder
->get_current_subfile ()->symtab
;
21875 /* Start a subfile for DWARF. FILENAME is the name of the file and
21876 DIRNAME the name of the source directory which contains FILENAME
21877 or NULL if not known.
21878 This routine tries to keep line numbers from identical absolute and
21879 relative file names in a common subfile.
21881 Using the `list' example from the GDB testsuite, which resides in
21882 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
21883 of /srcdir/list0.c yields the following debugging information for list0.c:
21885 DW_AT_name: /srcdir/list0.c
21886 DW_AT_comp_dir: /compdir
21887 files.files[0].name: list0.h
21888 files.files[0].dir: /srcdir
21889 files.files[1].name: list0.c
21890 files.files[1].dir: /srcdir
21892 The line number information for list0.c has to end up in a single
21893 subfile, so that `break /srcdir/list0.c:1' works as expected.
21894 start_subfile will ensure that this happens provided that we pass the
21895 concatenation of files.files[1].dir and files.files[1].name as the
21899 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
21900 const char *dirname
)
21902 gdb::unique_xmalloc_ptr
<char> copy
;
21904 /* In order not to lose the line information directory,
21905 we concatenate it to the filename when it makes sense.
21906 Note that the Dwarf3 standard says (speaking of filenames in line
21907 information): ``The directory index is ignored for file names
21908 that represent full path names''. Thus ignoring dirname in the
21909 `else' branch below isn't an issue. */
21911 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
21913 copy
.reset (concat (dirname
, SLASH_STRING
, filename
, (char *) NULL
));
21914 filename
= copy
.get ();
21917 cu
->get_builder ()->start_subfile (filename
);
21920 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
21921 buildsym_compunit constructor. */
21923 struct compunit_symtab
*
21924 dwarf2_cu::start_symtab (const char *name
, const char *comp_dir
,
21927 gdb_assert (m_builder
== nullptr);
21929 m_builder
.reset (new struct buildsym_compunit
21930 (this->per_objfile
->objfile
,
21931 name
, comp_dir
, language
, low_pc
));
21933 list_in_scope
= get_builder ()->get_file_symbols ();
21935 get_builder ()->record_debugformat ("DWARF 2");
21936 get_builder ()->record_producer (producer
);
21938 processing_has_namespace_info
= false;
21940 return get_builder ()->get_compunit_symtab ();
21944 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
21945 struct dwarf2_cu
*cu
)
21947 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21948 struct comp_unit_head
*cu_header
= &cu
->header
;
21950 /* NOTE drow/2003-01-30: There used to be a comment and some special
21951 code here to turn a symbol with DW_AT_external and a
21952 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
21953 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
21954 with some versions of binutils) where shared libraries could have
21955 relocations against symbols in their debug information - the
21956 minimal symbol would have the right address, but the debug info
21957 would not. It's no longer necessary, because we will explicitly
21958 apply relocations when we read in the debug information now. */
21960 /* A DW_AT_location attribute with no contents indicates that a
21961 variable has been optimized away. */
21962 if (attr
->form_is_block () && attr
->as_block ()->size
== 0)
21964 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21968 /* Handle one degenerate form of location expression specially, to
21969 preserve GDB's previous behavior when section offsets are
21970 specified. If this is just a DW_OP_addr, DW_OP_addrx, or
21971 DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */
21973 if (attr
->form_is_block ())
21975 struct dwarf_block
*block
= attr
->as_block ();
21977 if ((block
->data
[0] == DW_OP_addr
21978 && block
->size
== 1 + cu_header
->addr_size
)
21979 || ((block
->data
[0] == DW_OP_GNU_addr_index
21980 || block
->data
[0] == DW_OP_addrx
)
21982 == 1 + leb128_size (&block
->data
[1]))))
21984 unsigned int dummy
;
21986 if (block
->data
[0] == DW_OP_addr
)
21987 SET_SYMBOL_VALUE_ADDRESS
21988 (sym
, cu
->header
.read_address (objfile
->obfd
,
21992 SET_SYMBOL_VALUE_ADDRESS
21993 (sym
, read_addr_index_from_leb128 (cu
, block
->data
+ 1,
21995 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
21996 fixup_symbol_section (sym
, objfile
);
21997 SET_SYMBOL_VALUE_ADDRESS
21999 SYMBOL_VALUE_ADDRESS (sym
)
22000 + objfile
->section_offsets
[SYMBOL_SECTION (sym
)]);
22005 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
22006 expression evaluator, and use LOC_COMPUTED only when necessary
22007 (i.e. when the value of a register or memory location is
22008 referenced, or a thread-local block, etc.). Then again, it might
22009 not be worthwhile. I'm assuming that it isn't unless performance
22010 or memory numbers show me otherwise. */
22012 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
22014 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
22015 cu
->has_loclist
= true;
22018 /* Given a pointer to a DWARF information entry, figure out if we need
22019 to make a symbol table entry for it, and if so, create a new entry
22020 and return a pointer to it.
22021 If TYPE is NULL, determine symbol type from the die, otherwise
22022 used the passed type.
22023 If SPACE is not NULL, use it to hold the new symbol. If it is
22024 NULL, allocate a new symbol on the objfile's obstack. */
22026 static struct symbol
*
22027 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
22028 struct symbol
*space
)
22030 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
22031 struct objfile
*objfile
= per_objfile
->objfile
;
22032 struct gdbarch
*gdbarch
= objfile
->arch ();
22033 struct symbol
*sym
= NULL
;
22035 struct attribute
*attr
= NULL
;
22036 struct attribute
*attr2
= NULL
;
22037 CORE_ADDR baseaddr
;
22038 struct pending
**list_to_add
= NULL
;
22040 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
22042 baseaddr
= objfile
->text_section_offset ();
22044 name
= dwarf2_name (die
, cu
);
22047 int suppress_add
= 0;
22052 sym
= new (&objfile
->objfile_obstack
) symbol
;
22053 OBJSTAT (objfile
, n_syms
++);
22055 /* Cache this symbol's name and the name's demangled form (if any). */
22056 sym
->set_language (cu
->language
, &objfile
->objfile_obstack
);
22057 /* Fortran does not have mangling standard and the mangling does differ
22058 between gfortran, iFort etc. */
22059 const char *physname
22060 = (cu
->language
== language_fortran
22061 ? dwarf2_full_name (name
, die
, cu
)
22062 : dwarf2_physname (name
, die
, cu
));
22063 const char *linkagename
= dw2_linkage_name (die
, cu
);
22065 if (linkagename
== nullptr || cu
->language
== language_ada
)
22066 sym
->set_linkage_name (physname
);
22069 sym
->set_demangled_name (physname
, &objfile
->objfile_obstack
);
22070 sym
->set_linkage_name (linkagename
);
22073 /* Default assumptions.
22074 Use the passed type or decode it from the die. */
22075 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
22076 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
22078 SYMBOL_TYPE (sym
) = type
;
22080 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
22081 attr
= dwarf2_attr (die
,
22082 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
22084 if (attr
!= nullptr)
22085 SYMBOL_LINE (sym
) = attr
->constant_value (0);
22087 attr
= dwarf2_attr (die
,
22088 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
22090 if (attr
!= nullptr && attr
->form_is_unsigned ())
22092 file_name_index file_index
22093 = (file_name_index
) attr
->as_unsigned ();
22094 struct file_entry
*fe
;
22096 if (cu
->line_header
!= NULL
)
22097 fe
= cu
->line_header
->file_name_at (file_index
);
22102 complaint (_("file index out of range"));
22104 symbol_set_symtab (sym
, fe
->symtab
);
22110 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
22111 if (attr
!= nullptr)
22115 addr
= attr
->as_address ();
22116 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
22117 SET_SYMBOL_VALUE_ADDRESS (sym
, addr
);
22118 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
22121 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
22122 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
22123 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
22124 add_symbol_to_list (sym
, cu
->list_in_scope
);
22126 case DW_TAG_subprogram
:
22127 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
22129 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
22130 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
22131 if ((attr2
!= nullptr && attr2
->as_boolean ())
22132 || cu
->language
== language_ada
22133 || cu
->language
== language_fortran
)
22135 /* Subprograms marked external are stored as a global symbol.
22136 Ada and Fortran subprograms, whether marked external or
22137 not, are always stored as a global symbol, because we want
22138 to be able to access them globally. For instance, we want
22139 to be able to break on a nested subprogram without having
22140 to specify the context. */
22141 list_to_add
= cu
->get_builder ()->get_global_symbols ();
22145 list_to_add
= cu
->list_in_scope
;
22148 case DW_TAG_inlined_subroutine
:
22149 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
22151 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
22152 SYMBOL_INLINED (sym
) = 1;
22153 list_to_add
= cu
->list_in_scope
;
22155 case DW_TAG_template_value_param
:
22157 /* Fall through. */
22158 case DW_TAG_constant
:
22159 case DW_TAG_variable
:
22160 case DW_TAG_member
:
22161 /* Compilation with minimal debug info may result in
22162 variables with missing type entries. Change the
22163 misleading `void' type to something sensible. */
22164 if (SYMBOL_TYPE (sym
)->code () == TYPE_CODE_VOID
)
22165 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
22167 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
22168 /* In the case of DW_TAG_member, we should only be called for
22169 static const members. */
22170 if (die
->tag
== DW_TAG_member
)
22172 /* dwarf2_add_field uses die_is_declaration,
22173 so we do the same. */
22174 gdb_assert (die_is_declaration (die
, cu
));
22177 if (attr
!= nullptr)
22179 dwarf2_const_value (attr
, sym
, cu
);
22180 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
22183 if (attr2
!= nullptr && attr2
->as_boolean ())
22184 list_to_add
= cu
->get_builder ()->get_global_symbols ();
22186 list_to_add
= cu
->list_in_scope
;
22190 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22191 if (attr
!= nullptr)
22193 var_decode_location (attr
, sym
, cu
);
22194 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
22196 /* Fortran explicitly imports any global symbols to the local
22197 scope by DW_TAG_common_block. */
22198 if (cu
->language
== language_fortran
&& die
->parent
22199 && die
->parent
->tag
== DW_TAG_common_block
)
22202 if (SYMBOL_CLASS (sym
) == LOC_STATIC
22203 && SYMBOL_VALUE_ADDRESS (sym
) == 0
22204 && !per_objfile
->per_bfd
->has_section_at_zero
)
22206 /* When a static variable is eliminated by the linker,
22207 the corresponding debug information is not stripped
22208 out, but the variable address is set to null;
22209 do not add such variables into symbol table. */
22211 else if (attr2
!= nullptr && attr2
->as_boolean ())
22213 if (SYMBOL_CLASS (sym
) == LOC_STATIC
22214 && (objfile
->flags
& OBJF_MAINLINE
) == 0
22215 && per_objfile
->per_bfd
->can_copy
)
22217 /* A global static variable might be subject to
22218 copy relocation. We first check for a local
22219 minsym, though, because maybe the symbol was
22220 marked hidden, in which case this would not
22222 bound_minimal_symbol found
22223 = (lookup_minimal_symbol_linkage
22224 (sym
->linkage_name (), objfile
));
22225 if (found
.minsym
!= nullptr)
22226 sym
->maybe_copied
= 1;
22229 /* A variable with DW_AT_external is never static,
22230 but it may be block-scoped. */
22232 = ((cu
->list_in_scope
22233 == cu
->get_builder ()->get_file_symbols ())
22234 ? cu
->get_builder ()->get_global_symbols ()
22235 : cu
->list_in_scope
);
22238 list_to_add
= cu
->list_in_scope
;
22242 /* We do not know the address of this symbol.
22243 If it is an external symbol and we have type information
22244 for it, enter the symbol as a LOC_UNRESOLVED symbol.
22245 The address of the variable will then be determined from
22246 the minimal symbol table whenever the variable is
22248 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
22250 /* Fortran explicitly imports any global symbols to the local
22251 scope by DW_TAG_common_block. */
22252 if (cu
->language
== language_fortran
&& die
->parent
22253 && die
->parent
->tag
== DW_TAG_common_block
)
22255 /* SYMBOL_CLASS doesn't matter here because
22256 read_common_block is going to reset it. */
22258 list_to_add
= cu
->list_in_scope
;
22260 else if (attr2
!= nullptr && attr2
->as_boolean ()
22261 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
22263 /* A variable with DW_AT_external is never static, but it
22264 may be block-scoped. */
22266 = ((cu
->list_in_scope
22267 == cu
->get_builder ()->get_file_symbols ())
22268 ? cu
->get_builder ()->get_global_symbols ()
22269 : cu
->list_in_scope
);
22271 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
22273 else if (!die_is_declaration (die
, cu
))
22275 /* Use the default LOC_OPTIMIZED_OUT class. */
22276 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
22278 list_to_add
= cu
->list_in_scope
;
22282 case DW_TAG_formal_parameter
:
22284 /* If we are inside a function, mark this as an argument. If
22285 not, we might be looking at an argument to an inlined function
22286 when we do not have enough information to show inlined frames;
22287 pretend it's a local variable in that case so that the user can
22289 struct context_stack
*curr
22290 = cu
->get_builder ()->get_current_context_stack ();
22291 if (curr
!= nullptr && curr
->name
!= nullptr)
22292 SYMBOL_IS_ARGUMENT (sym
) = 1;
22293 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22294 if (attr
!= nullptr)
22296 var_decode_location (attr
, sym
, cu
);
22298 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
22299 if (attr
!= nullptr)
22301 dwarf2_const_value (attr
, sym
, cu
);
22304 list_to_add
= cu
->list_in_scope
;
22307 case DW_TAG_unspecified_parameters
:
22308 /* From varargs functions; gdb doesn't seem to have any
22309 interest in this information, so just ignore it for now.
22312 case DW_TAG_template_type_param
:
22314 /* Fall through. */
22315 case DW_TAG_class_type
:
22316 case DW_TAG_interface_type
:
22317 case DW_TAG_structure_type
:
22318 case DW_TAG_union_type
:
22319 case DW_TAG_set_type
:
22320 case DW_TAG_enumeration_type
:
22321 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
22322 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
22325 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
22326 really ever be static objects: otherwise, if you try
22327 to, say, break of a class's method and you're in a file
22328 which doesn't mention that class, it won't work unless
22329 the check for all static symbols in lookup_symbol_aux
22330 saves you. See the OtherFileClass tests in
22331 gdb.c++/namespace.exp. */
22335 buildsym_compunit
*builder
= cu
->get_builder ();
22337 = (cu
->list_in_scope
== builder
->get_file_symbols ()
22338 && cu
->language
== language_cplus
22339 ? builder
->get_global_symbols ()
22340 : cu
->list_in_scope
);
22342 /* The semantics of C++ state that "struct foo {
22343 ... }" also defines a typedef for "foo". */
22344 if (cu
->language
== language_cplus
22345 || cu
->language
== language_ada
22346 || cu
->language
== language_d
22347 || cu
->language
== language_rust
)
22349 /* The symbol's name is already allocated along
22350 with this objfile, so we don't need to
22351 duplicate it for the type. */
22352 if (SYMBOL_TYPE (sym
)->name () == 0)
22353 SYMBOL_TYPE (sym
)->set_name (sym
->search_name ());
22358 case DW_TAG_typedef
:
22359 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
22360 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
22361 list_to_add
= cu
->list_in_scope
;
22363 case DW_TAG_array_type
:
22364 case DW_TAG_base_type
:
22365 case DW_TAG_subrange_type
:
22366 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
22367 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
22368 list_to_add
= cu
->list_in_scope
;
22370 case DW_TAG_enumerator
:
22371 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
22372 if (attr
!= nullptr)
22374 dwarf2_const_value (attr
, sym
, cu
);
22377 /* NOTE: carlton/2003-11-10: See comment above in the
22378 DW_TAG_class_type, etc. block. */
22381 = (cu
->list_in_scope
== cu
->get_builder ()->get_file_symbols ()
22382 && cu
->language
== language_cplus
22383 ? cu
->get_builder ()->get_global_symbols ()
22384 : cu
->list_in_scope
);
22387 case DW_TAG_imported_declaration
:
22388 case DW_TAG_namespace
:
22389 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
22390 list_to_add
= cu
->get_builder ()->get_global_symbols ();
22392 case DW_TAG_module
:
22393 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
22394 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
22395 list_to_add
= cu
->get_builder ()->get_global_symbols ();
22397 case DW_TAG_common_block
:
22398 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
22399 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
22400 add_symbol_to_list (sym
, cu
->list_in_scope
);
22403 /* Not a tag we recognize. Hopefully we aren't processing
22404 trash data, but since we must specifically ignore things
22405 we don't recognize, there is nothing else we should do at
22407 complaint (_("unsupported tag: '%s'"),
22408 dwarf_tag_name (die
->tag
));
22414 sym
->hash_next
= objfile
->template_symbols
;
22415 objfile
->template_symbols
= sym
;
22416 list_to_add
= NULL
;
22419 if (list_to_add
!= NULL
)
22420 add_symbol_to_list (sym
, list_to_add
);
22422 /* For the benefit of old versions of GCC, check for anonymous
22423 namespaces based on the demangled name. */
22424 if (!cu
->processing_has_namespace_info
22425 && cu
->language
== language_cplus
)
22426 cp_scan_for_anonymous_namespaces (cu
->get_builder (), sym
, objfile
);
22431 /* Given an attr with a DW_FORM_dataN value in host byte order,
22432 zero-extend it as appropriate for the symbol's type. The DWARF
22433 standard (v4) is not entirely clear about the meaning of using
22434 DW_FORM_dataN for a constant with a signed type, where the type is
22435 wider than the data. The conclusion of a discussion on the DWARF
22436 list was that this is unspecified. We choose to always zero-extend
22437 because that is the interpretation long in use by GCC. */
22440 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
22441 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
22443 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
22444 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
22445 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
22446 LONGEST l
= attr
->constant_value (0);
22448 if (bits
< sizeof (*value
) * 8)
22450 l
&= ((LONGEST
) 1 << bits
) - 1;
22453 else if (bits
== sizeof (*value
) * 8)
22457 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
22458 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
22465 /* Read a constant value from an attribute. Either set *VALUE, or if
22466 the value does not fit in *VALUE, set *BYTES - either already
22467 allocated on the objfile obstack, or newly allocated on OBSTACK,
22468 or, set *BATON, if we translated the constant to a location
22472 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
22473 const char *name
, struct obstack
*obstack
,
22474 struct dwarf2_cu
*cu
,
22475 LONGEST
*value
, const gdb_byte
**bytes
,
22476 struct dwarf2_locexpr_baton
**baton
)
22478 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
22479 struct objfile
*objfile
= per_objfile
->objfile
;
22480 struct comp_unit_head
*cu_header
= &cu
->header
;
22481 struct dwarf_block
*blk
;
22482 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
22483 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
22489 switch (attr
->form
)
22492 case DW_FORM_addrx
:
22493 case DW_FORM_GNU_addr_index
:
22497 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
22498 dwarf2_const_value_length_mismatch_complaint (name
,
22499 cu_header
->addr_size
,
22500 TYPE_LENGTH (type
));
22501 /* Symbols of this form are reasonably rare, so we just
22502 piggyback on the existing location code rather than writing
22503 a new implementation of symbol_computed_ops. */
22504 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
22505 (*baton
)->per_objfile
= per_objfile
;
22506 (*baton
)->per_cu
= cu
->per_cu
;
22507 gdb_assert ((*baton
)->per_cu
);
22509 (*baton
)->size
= 2 + cu_header
->addr_size
;
22510 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
22511 (*baton
)->data
= data
;
22513 data
[0] = DW_OP_addr
;
22514 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
22515 byte_order
, attr
->as_address ());
22516 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
22519 case DW_FORM_string
:
22522 case DW_FORM_GNU_str_index
:
22523 case DW_FORM_GNU_strp_alt
:
22524 /* The string is already allocated on the objfile obstack, point
22526 *bytes
= (const gdb_byte
*) attr
->as_string ();
22528 case DW_FORM_block1
:
22529 case DW_FORM_block2
:
22530 case DW_FORM_block4
:
22531 case DW_FORM_block
:
22532 case DW_FORM_exprloc
:
22533 case DW_FORM_data16
:
22534 blk
= attr
->as_block ();
22535 if (TYPE_LENGTH (type
) != blk
->size
)
22536 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
22537 TYPE_LENGTH (type
));
22538 *bytes
= blk
->data
;
22541 /* The DW_AT_const_value attributes are supposed to carry the
22542 symbol's value "represented as it would be on the target
22543 architecture." By the time we get here, it's already been
22544 converted to host endianness, so we just need to sign- or
22545 zero-extend it as appropriate. */
22546 case DW_FORM_data1
:
22547 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
22549 case DW_FORM_data2
:
22550 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
22552 case DW_FORM_data4
:
22553 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
22555 case DW_FORM_data8
:
22556 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
22559 case DW_FORM_sdata
:
22560 case DW_FORM_implicit_const
:
22561 *value
= attr
->as_signed ();
22564 case DW_FORM_udata
:
22565 *value
= attr
->as_unsigned ();
22569 complaint (_("unsupported const value attribute form: '%s'"),
22570 dwarf_form_name (attr
->form
));
22577 /* Copy constant value from an attribute to a symbol. */
22580 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
22581 struct dwarf2_cu
*cu
)
22583 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
22585 const gdb_byte
*bytes
;
22586 struct dwarf2_locexpr_baton
*baton
;
22588 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
22589 sym
->print_name (),
22590 &objfile
->objfile_obstack
, cu
,
22591 &value
, &bytes
, &baton
);
22595 SYMBOL_LOCATION_BATON (sym
) = baton
;
22596 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
22598 else if (bytes
!= NULL
)
22600 SYMBOL_VALUE_BYTES (sym
) = bytes
;
22601 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
22605 SYMBOL_VALUE (sym
) = value
;
22606 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
22610 /* Return the type of the die in question using its DW_AT_type attribute. */
22612 static struct type
*
22613 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22615 struct attribute
*type_attr
;
22617 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
22620 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
22621 /* A missing DW_AT_type represents a void type. */
22622 return objfile_type (objfile
)->builtin_void
;
22625 return lookup_die_type (die
, type_attr
, cu
);
22628 /* True iff CU's producer generates GNAT Ada auxiliary information
22629 that allows to find parallel types through that information instead
22630 of having to do expensive parallel lookups by type name. */
22633 need_gnat_info (struct dwarf2_cu
*cu
)
22635 /* Assume that the Ada compiler was GNAT, which always produces
22636 the auxiliary information. */
22637 return (cu
->language
== language_ada
);
22640 /* Return the auxiliary type of the die in question using its
22641 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
22642 attribute is not present. */
22644 static struct type
*
22645 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22647 struct attribute
*type_attr
;
22649 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
22653 return lookup_die_type (die
, type_attr
, cu
);
22656 /* If DIE has a descriptive_type attribute, then set the TYPE's
22657 descriptive type accordingly. */
22660 set_descriptive_type (struct type
*type
, struct die_info
*die
,
22661 struct dwarf2_cu
*cu
)
22663 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
22665 if (descriptive_type
)
22667 ALLOCATE_GNAT_AUX_TYPE (type
);
22668 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
22672 /* Return the containing type of the die in question using its
22673 DW_AT_containing_type attribute. */
22675 static struct type
*
22676 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22678 struct attribute
*type_attr
;
22679 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
22681 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
22683 error (_("Dwarf Error: Problem turning containing type into gdb type "
22684 "[in module %s]"), objfile_name (objfile
));
22686 return lookup_die_type (die
, type_attr
, cu
);
22689 /* Return an error marker type to use for the ill formed type in DIE/CU. */
22691 static struct type
*
22692 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
22694 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
22695 struct objfile
*objfile
= per_objfile
->objfile
;
22698 std::string message
22699 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
22700 objfile_name (objfile
),
22701 sect_offset_str (cu
->header
.sect_off
),
22702 sect_offset_str (die
->sect_off
));
22703 saved
= obstack_strdup (&objfile
->objfile_obstack
, message
);
22705 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
22708 /* Look up the type of DIE in CU using its type attribute ATTR.
22709 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
22710 DW_AT_containing_type.
22711 If there is no type substitute an error marker. */
22713 static struct type
*
22714 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
22715 struct dwarf2_cu
*cu
)
22717 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
22718 struct objfile
*objfile
= per_objfile
->objfile
;
22719 struct type
*this_type
;
22721 gdb_assert (attr
->name
== DW_AT_type
22722 || attr
->name
== DW_AT_GNAT_descriptive_type
22723 || attr
->name
== DW_AT_containing_type
);
22725 /* First see if we have it cached. */
22727 if (attr
->form
== DW_FORM_GNU_ref_alt
)
22729 struct dwarf2_per_cu_data
*per_cu
;
22730 sect_offset sect_off
= attr
->get_ref_die_offset ();
22732 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1, per_objfile
);
22733 this_type
= get_die_type_at_offset (sect_off
, per_cu
, per_objfile
);
22735 else if (attr
->form_is_ref ())
22737 sect_offset sect_off
= attr
->get_ref_die_offset ();
22739 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
, per_objfile
);
22741 else if (attr
->form
== DW_FORM_ref_sig8
)
22743 ULONGEST signature
= attr
->as_signature ();
22745 return get_signatured_type (die
, signature
, cu
);
22749 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
22750 " at %s [in module %s]"),
22751 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
22752 objfile_name (objfile
));
22753 return build_error_marker_type (cu
, die
);
22756 /* If not cached we need to read it in. */
22758 if (this_type
== NULL
)
22760 struct die_info
*type_die
= NULL
;
22761 struct dwarf2_cu
*type_cu
= cu
;
22763 if (attr
->form_is_ref ())
22764 type_die
= follow_die_ref (die
, attr
, &type_cu
);
22765 if (type_die
== NULL
)
22766 return build_error_marker_type (cu
, die
);
22767 /* If we find the type now, it's probably because the type came
22768 from an inter-CU reference and the type's CU got expanded before
22770 this_type
= read_type_die (type_die
, type_cu
);
22773 /* If we still don't have a type use an error marker. */
22775 if (this_type
== NULL
)
22776 return build_error_marker_type (cu
, die
);
22781 /* Return the type in DIE, CU.
22782 Returns NULL for invalid types.
22784 This first does a lookup in die_type_hash,
22785 and only reads the die in if necessary.
22787 NOTE: This can be called when reading in partial or full symbols. */
22789 static struct type
*
22790 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
22792 struct type
*this_type
;
22794 this_type
= get_die_type (die
, cu
);
22798 return read_type_die_1 (die
, cu
);
22801 /* Read the type in DIE, CU.
22802 Returns NULL for invalid types. */
22804 static struct type
*
22805 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
22807 struct type
*this_type
= NULL
;
22811 case DW_TAG_class_type
:
22812 case DW_TAG_interface_type
:
22813 case DW_TAG_structure_type
:
22814 case DW_TAG_union_type
:
22815 this_type
= read_structure_type (die
, cu
);
22817 case DW_TAG_enumeration_type
:
22818 this_type
= read_enumeration_type (die
, cu
);
22820 case DW_TAG_subprogram
:
22821 case DW_TAG_subroutine_type
:
22822 case DW_TAG_inlined_subroutine
:
22823 this_type
= read_subroutine_type (die
, cu
);
22825 case DW_TAG_array_type
:
22826 this_type
= read_array_type (die
, cu
);
22828 case DW_TAG_set_type
:
22829 this_type
= read_set_type (die
, cu
);
22831 case DW_TAG_pointer_type
:
22832 this_type
= read_tag_pointer_type (die
, cu
);
22834 case DW_TAG_ptr_to_member_type
:
22835 this_type
= read_tag_ptr_to_member_type (die
, cu
);
22837 case DW_TAG_reference_type
:
22838 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
22840 case DW_TAG_rvalue_reference_type
:
22841 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
22843 case DW_TAG_const_type
:
22844 this_type
= read_tag_const_type (die
, cu
);
22846 case DW_TAG_volatile_type
:
22847 this_type
= read_tag_volatile_type (die
, cu
);
22849 case DW_TAG_restrict_type
:
22850 this_type
= read_tag_restrict_type (die
, cu
);
22852 case DW_TAG_string_type
:
22853 this_type
= read_tag_string_type (die
, cu
);
22855 case DW_TAG_typedef
:
22856 this_type
= read_typedef (die
, cu
);
22858 case DW_TAG_subrange_type
:
22859 this_type
= read_subrange_type (die
, cu
);
22861 case DW_TAG_base_type
:
22862 this_type
= read_base_type (die
, cu
);
22864 case DW_TAG_unspecified_type
:
22865 this_type
= read_unspecified_type (die
, cu
);
22867 case DW_TAG_namespace
:
22868 this_type
= read_namespace_type (die
, cu
);
22870 case DW_TAG_module
:
22871 this_type
= read_module_type (die
, cu
);
22873 case DW_TAG_atomic_type
:
22874 this_type
= read_tag_atomic_type (die
, cu
);
22877 complaint (_("unexpected tag in read_type_die: '%s'"),
22878 dwarf_tag_name (die
->tag
));
22885 /* See if we can figure out if the class lives in a namespace. We do
22886 this by looking for a member function; its demangled name will
22887 contain namespace info, if there is any.
22888 Return the computed name or NULL.
22889 Space for the result is allocated on the objfile's obstack.
22890 This is the full-die version of guess_partial_die_structure_name.
22891 In this case we know DIE has no useful parent. */
22893 static const char *
22894 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22896 struct die_info
*spec_die
;
22897 struct dwarf2_cu
*spec_cu
;
22898 struct die_info
*child
;
22899 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
22902 spec_die
= die_specification (die
, &spec_cu
);
22903 if (spec_die
!= NULL
)
22909 for (child
= die
->child
;
22911 child
= child
->sibling
)
22913 if (child
->tag
== DW_TAG_subprogram
)
22915 const char *linkage_name
= dw2_linkage_name (child
, cu
);
22917 if (linkage_name
!= NULL
)
22919 gdb::unique_xmalloc_ptr
<char> actual_name
22920 (cu
->language_defn
->class_name_from_physname (linkage_name
));
22921 const char *name
= NULL
;
22923 if (actual_name
!= NULL
)
22925 const char *die_name
= dwarf2_name (die
, cu
);
22927 if (die_name
!= NULL
22928 && strcmp (die_name
, actual_name
.get ()) != 0)
22930 /* Strip off the class name from the full name.
22931 We want the prefix. */
22932 int die_name_len
= strlen (die_name
);
22933 int actual_name_len
= strlen (actual_name
.get ());
22934 const char *ptr
= actual_name
.get ();
22936 /* Test for '::' as a sanity check. */
22937 if (actual_name_len
> die_name_len
+ 2
22938 && ptr
[actual_name_len
- die_name_len
- 1] == ':')
22939 name
= obstack_strndup (
22940 &objfile
->per_bfd
->storage_obstack
,
22941 ptr
, actual_name_len
- die_name_len
- 2);
22952 /* GCC might emit a nameless typedef that has a linkage name. Determine the
22953 prefix part in such case. See
22954 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22956 static const char *
22957 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22959 struct attribute
*attr
;
22962 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
22963 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
22966 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
22969 attr
= dw2_linkage_name_attr (die
, cu
);
22970 const char *attr_name
= attr
->as_string ();
22971 if (attr
== NULL
|| attr_name
== NULL
)
22974 /* dwarf2_name had to be already called. */
22975 gdb_assert (attr
->canonical_string_p ());
22977 /* Strip the base name, keep any leading namespaces/classes. */
22978 base
= strrchr (attr_name
, ':');
22979 if (base
== NULL
|| base
== attr_name
|| base
[-1] != ':')
22982 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
22983 return obstack_strndup (&objfile
->per_bfd
->storage_obstack
,
22985 &base
[-1] - attr_name
);
22988 /* Return the name of the namespace/class that DIE is defined within,
22989 or "" if we can't tell. The caller should not xfree the result.
22991 For example, if we're within the method foo() in the following
23001 then determine_prefix on foo's die will return "N::C". */
23003 static const char *
23004 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
23006 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
23007 struct die_info
*parent
, *spec_die
;
23008 struct dwarf2_cu
*spec_cu
;
23009 struct type
*parent_type
;
23010 const char *retval
;
23012 if (cu
->language
!= language_cplus
23013 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
23014 && cu
->language
!= language_rust
)
23017 retval
= anonymous_struct_prefix (die
, cu
);
23021 /* We have to be careful in the presence of DW_AT_specification.
23022 For example, with GCC 3.4, given the code
23026 // Definition of N::foo.
23030 then we'll have a tree of DIEs like this:
23032 1: DW_TAG_compile_unit
23033 2: DW_TAG_namespace // N
23034 3: DW_TAG_subprogram // declaration of N::foo
23035 4: DW_TAG_subprogram // definition of N::foo
23036 DW_AT_specification // refers to die #3
23038 Thus, when processing die #4, we have to pretend that we're in
23039 the context of its DW_AT_specification, namely the contex of die
23042 spec_die
= die_specification (die
, &spec_cu
);
23043 if (spec_die
== NULL
)
23044 parent
= die
->parent
;
23047 parent
= spec_die
->parent
;
23051 if (parent
== NULL
)
23053 else if (parent
->building_fullname
)
23056 const char *parent_name
;
23058 /* It has been seen on RealView 2.2 built binaries,
23059 DW_TAG_template_type_param types actually _defined_ as
23060 children of the parent class:
23063 template class <class Enum> Class{};
23064 Class<enum E> class_e;
23066 1: DW_TAG_class_type (Class)
23067 2: DW_TAG_enumeration_type (E)
23068 3: DW_TAG_enumerator (enum1:0)
23069 3: DW_TAG_enumerator (enum2:1)
23071 2: DW_TAG_template_type_param
23072 DW_AT_type DW_FORM_ref_udata (E)
23074 Besides being broken debug info, it can put GDB into an
23075 infinite loop. Consider:
23077 When we're building the full name for Class<E>, we'll start
23078 at Class, and go look over its template type parameters,
23079 finding E. We'll then try to build the full name of E, and
23080 reach here. We're now trying to build the full name of E,
23081 and look over the parent DIE for containing scope. In the
23082 broken case, if we followed the parent DIE of E, we'd again
23083 find Class, and once again go look at its template type
23084 arguments, etc., etc. Simply don't consider such parent die
23085 as source-level parent of this die (it can't be, the language
23086 doesn't allow it), and break the loop here. */
23087 name
= dwarf2_name (die
, cu
);
23088 parent_name
= dwarf2_name (parent
, cu
);
23089 complaint (_("template param type '%s' defined within parent '%s'"),
23090 name
? name
: "<unknown>",
23091 parent_name
? parent_name
: "<unknown>");
23095 switch (parent
->tag
)
23097 case DW_TAG_namespace
:
23098 parent_type
= read_type_die (parent
, cu
);
23099 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
23100 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
23101 Work around this problem here. */
23102 if (cu
->language
== language_cplus
23103 && strcmp (parent_type
->name (), "::") == 0)
23105 /* We give a name to even anonymous namespaces. */
23106 return parent_type
->name ();
23107 case DW_TAG_class_type
:
23108 case DW_TAG_interface_type
:
23109 case DW_TAG_structure_type
:
23110 case DW_TAG_union_type
:
23111 case DW_TAG_module
:
23112 parent_type
= read_type_die (parent
, cu
);
23113 if (parent_type
->name () != NULL
)
23114 return parent_type
->name ();
23116 /* An anonymous structure is only allowed non-static data
23117 members; no typedefs, no member functions, et cetera.
23118 So it does not need a prefix. */
23120 case DW_TAG_compile_unit
:
23121 case DW_TAG_partial_unit
:
23122 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
23123 if (cu
->language
== language_cplus
23124 && !per_objfile
->per_bfd
->types
.empty ()
23125 && die
->child
!= NULL
23126 && (die
->tag
== DW_TAG_class_type
23127 || die
->tag
== DW_TAG_structure_type
23128 || die
->tag
== DW_TAG_union_type
))
23130 const char *name
= guess_full_die_structure_name (die
, cu
);
23135 case DW_TAG_subprogram
:
23136 /* Nested subroutines in Fortran get a prefix with the name
23137 of the parent's subroutine. */
23138 if (cu
->language
== language_fortran
)
23140 if ((die
->tag
== DW_TAG_subprogram
)
23141 && (dwarf2_name (parent
, cu
) != NULL
))
23142 return dwarf2_name (parent
, cu
);
23144 return determine_prefix (parent
, cu
);
23145 case DW_TAG_enumeration_type
:
23146 parent_type
= read_type_die (parent
, cu
);
23147 if (TYPE_DECLARED_CLASS (parent_type
))
23149 if (parent_type
->name () != NULL
)
23150 return parent_type
->name ();
23153 /* Fall through. */
23155 return determine_prefix (parent
, cu
);
23159 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
23160 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
23161 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
23162 an obconcat, otherwise allocate storage for the result. The CU argument is
23163 used to determine the language and hence, the appropriate separator. */
23165 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
23168 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
23169 int physname
, struct dwarf2_cu
*cu
)
23171 const char *lead
= "";
23174 if (suffix
== NULL
|| suffix
[0] == '\0'
23175 || prefix
== NULL
|| prefix
[0] == '\0')
23177 else if (cu
->language
== language_d
)
23179 /* For D, the 'main' function could be defined in any module, but it
23180 should never be prefixed. */
23181 if (strcmp (suffix
, "D main") == 0)
23189 else if (cu
->language
== language_fortran
&& physname
)
23191 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
23192 DW_AT_MIPS_linkage_name is preferred and used instead. */
23200 if (prefix
== NULL
)
23202 if (suffix
== NULL
)
23209 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
23211 strcpy (retval
, lead
);
23212 strcat (retval
, prefix
);
23213 strcat (retval
, sep
);
23214 strcat (retval
, suffix
);
23219 /* We have an obstack. */
23220 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
23224 /* Get name of a die, return NULL if not found. */
23226 static const char *
23227 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
23228 struct objfile
*objfile
)
23230 if (name
&& cu
->language
== language_cplus
)
23232 gdb::unique_xmalloc_ptr
<char> canon_name
23233 = cp_canonicalize_string (name
);
23235 if (canon_name
!= nullptr)
23236 name
= objfile
->intern (canon_name
.get ());
23242 /* Get name of a die, return NULL if not found.
23243 Anonymous namespaces are converted to their magic string. */
23245 static const char *
23246 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
23248 struct attribute
*attr
;
23249 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
23251 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
23252 const char *attr_name
= attr
== nullptr ? nullptr : attr
->as_string ();
23253 if (attr_name
== nullptr
23254 && die
->tag
!= DW_TAG_namespace
23255 && die
->tag
!= DW_TAG_class_type
23256 && die
->tag
!= DW_TAG_interface_type
23257 && die
->tag
!= DW_TAG_structure_type
23258 && die
->tag
!= DW_TAG_union_type
)
23263 case DW_TAG_compile_unit
:
23264 case DW_TAG_partial_unit
:
23265 /* Compilation units have a DW_AT_name that is a filename, not
23266 a source language identifier. */
23267 case DW_TAG_enumeration_type
:
23268 case DW_TAG_enumerator
:
23269 /* These tags always have simple identifiers already; no need
23270 to canonicalize them. */
23273 case DW_TAG_namespace
:
23274 if (attr_name
!= nullptr)
23276 return CP_ANONYMOUS_NAMESPACE_STR
;
23278 case DW_TAG_class_type
:
23279 case DW_TAG_interface_type
:
23280 case DW_TAG_structure_type
:
23281 case DW_TAG_union_type
:
23282 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
23283 structures or unions. These were of the form "._%d" in GCC 4.1,
23284 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
23285 and GCC 4.4. We work around this problem by ignoring these. */
23286 if (attr_name
!= nullptr
23287 && (startswith (attr_name
, "._")
23288 || startswith (attr_name
, "<anonymous")))
23291 /* GCC might emit a nameless typedef that has a linkage name. See
23292 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
23293 if (!attr
|| attr_name
== NULL
)
23295 attr
= dw2_linkage_name_attr (die
, cu
);
23296 attr_name
= attr
== nullptr ? nullptr : attr
->as_string ();
23297 if (attr
== NULL
|| attr_name
== NULL
)
23300 /* Avoid demangling attr_name the second time on a second
23301 call for the same DIE. */
23302 if (!attr
->canonical_string_p ())
23304 gdb::unique_xmalloc_ptr
<char> demangled
23305 (gdb_demangle (attr_name
, DMGL_TYPES
));
23306 if (demangled
== nullptr)
23309 attr
->set_string_canonical (objfile
->intern (demangled
.get ()));
23310 attr_name
= attr
->as_string ();
23313 /* Strip any leading namespaces/classes, keep only the
23314 base name. DW_AT_name for named DIEs does not
23315 contain the prefixes. */
23316 const char *base
= strrchr (attr_name
, ':');
23317 if (base
&& base
> attr_name
&& base
[-1] == ':')
23328 if (!attr
->canonical_string_p ())
23329 attr
->set_string_canonical (dwarf2_canonicalize_name (attr_name
, cu
,
23331 return attr
->as_string ();
23334 /* Return the die that this die in an extension of, or NULL if there
23335 is none. *EXT_CU is the CU containing DIE on input, and the CU
23336 containing the return value on output. */
23338 static struct die_info
*
23339 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
23341 struct attribute
*attr
;
23343 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
23347 return follow_die_ref (die
, attr
, ext_cu
);
23351 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
23355 print_spaces (indent
, f
);
23356 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
23357 dwarf_tag_name (die
->tag
), die
->abbrev
,
23358 sect_offset_str (die
->sect_off
));
23360 if (die
->parent
!= NULL
)
23362 print_spaces (indent
, f
);
23363 fprintf_unfiltered (f
, " parent at offset: %s\n",
23364 sect_offset_str (die
->parent
->sect_off
));
23367 print_spaces (indent
, f
);
23368 fprintf_unfiltered (f
, " has children: %s\n",
23369 dwarf_bool_name (die
->child
!= NULL
));
23371 print_spaces (indent
, f
);
23372 fprintf_unfiltered (f
, " attributes:\n");
23374 for (i
= 0; i
< die
->num_attrs
; ++i
)
23376 print_spaces (indent
, f
);
23377 fprintf_unfiltered (f
, " %s (%s) ",
23378 dwarf_attr_name (die
->attrs
[i
].name
),
23379 dwarf_form_name (die
->attrs
[i
].form
));
23381 switch (die
->attrs
[i
].form
)
23384 case DW_FORM_addrx
:
23385 case DW_FORM_GNU_addr_index
:
23386 fprintf_unfiltered (f
, "address: ");
23387 fputs_filtered (hex_string (die
->attrs
[i
].as_address ()), f
);
23389 case DW_FORM_block2
:
23390 case DW_FORM_block4
:
23391 case DW_FORM_block
:
23392 case DW_FORM_block1
:
23393 fprintf_unfiltered (f
, "block: size %s",
23394 pulongest (die
->attrs
[i
].as_block ()->size
));
23396 case DW_FORM_exprloc
:
23397 fprintf_unfiltered (f
, "expression: size %s",
23398 pulongest (die
->attrs
[i
].as_block ()->size
));
23400 case DW_FORM_data16
:
23401 fprintf_unfiltered (f
, "constant of 16 bytes");
23403 case DW_FORM_ref_addr
:
23404 fprintf_unfiltered (f
, "ref address: ");
23405 fputs_filtered (hex_string (die
->attrs
[i
].as_unsigned ()), f
);
23407 case DW_FORM_GNU_ref_alt
:
23408 fprintf_unfiltered (f
, "alt ref address: ");
23409 fputs_filtered (hex_string (die
->attrs
[i
].as_unsigned ()), f
);
23415 case DW_FORM_ref_udata
:
23416 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
23417 (long) (die
->attrs
[i
].as_unsigned ()));
23419 case DW_FORM_data1
:
23420 case DW_FORM_data2
:
23421 case DW_FORM_data4
:
23422 case DW_FORM_data8
:
23423 case DW_FORM_udata
:
23424 fprintf_unfiltered (f
, "constant: %s",
23425 pulongest (die
->attrs
[i
].as_unsigned ()));
23427 case DW_FORM_sec_offset
:
23428 fprintf_unfiltered (f
, "section offset: %s",
23429 pulongest (die
->attrs
[i
].as_unsigned ()));
23431 case DW_FORM_ref_sig8
:
23432 fprintf_unfiltered (f
, "signature: %s",
23433 hex_string (die
->attrs
[i
].as_signature ()));
23435 case DW_FORM_string
:
23437 case DW_FORM_line_strp
:
23439 case DW_FORM_GNU_str_index
:
23440 case DW_FORM_GNU_strp_alt
:
23441 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
23442 die
->attrs
[i
].as_string ()
23443 ? die
->attrs
[i
].as_string () : "",
23444 die
->attrs
[i
].canonical_string_p () ? "is" : "not");
23447 if (die
->attrs
[i
].as_boolean ())
23448 fprintf_unfiltered (f
, "flag: TRUE");
23450 fprintf_unfiltered (f
, "flag: FALSE");
23452 case DW_FORM_flag_present
:
23453 fprintf_unfiltered (f
, "flag: TRUE");
23455 case DW_FORM_indirect
:
23456 /* The reader will have reduced the indirect form to
23457 the "base form" so this form should not occur. */
23458 fprintf_unfiltered (f
,
23459 "unexpected attribute form: DW_FORM_indirect");
23461 case DW_FORM_sdata
:
23462 case DW_FORM_implicit_const
:
23463 fprintf_unfiltered (f
, "constant: %s",
23464 plongest (die
->attrs
[i
].as_signed ()));
23467 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
23468 die
->attrs
[i
].form
);
23471 fprintf_unfiltered (f
, "\n");
23476 dump_die_for_error (struct die_info
*die
)
23478 dump_die_shallow (gdb_stderr
, 0, die
);
23482 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
23484 int indent
= level
* 4;
23486 gdb_assert (die
!= NULL
);
23488 if (level
>= max_level
)
23491 dump_die_shallow (f
, indent
, die
);
23493 if (die
->child
!= NULL
)
23495 print_spaces (indent
, f
);
23496 fprintf_unfiltered (f
, " Children:");
23497 if (level
+ 1 < max_level
)
23499 fprintf_unfiltered (f
, "\n");
23500 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
23504 fprintf_unfiltered (f
,
23505 " [not printed, max nesting level reached]\n");
23509 if (die
->sibling
!= NULL
&& level
> 0)
23511 dump_die_1 (f
, level
, max_level
, die
->sibling
);
23515 /* This is called from the pdie macro in gdbinit.in.
23516 It's not static so gcc will keep a copy callable from gdb. */
23519 dump_die (struct die_info
*die
, int max_level
)
23521 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
23525 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
23529 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
23530 to_underlying (die
->sect_off
),
23536 /* Follow reference or signature attribute ATTR of SRC_DIE.
23537 On entry *REF_CU is the CU of SRC_DIE.
23538 On exit *REF_CU is the CU of the result. */
23540 static struct die_info
*
23541 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23542 struct dwarf2_cu
**ref_cu
)
23544 struct die_info
*die
;
23546 if (attr
->form_is_ref ())
23547 die
= follow_die_ref (src_die
, attr
, ref_cu
);
23548 else if (attr
->form
== DW_FORM_ref_sig8
)
23549 die
= follow_die_sig (src_die
, attr
, ref_cu
);
23552 dump_die_for_error (src_die
);
23553 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
23554 objfile_name ((*ref_cu
)->per_objfile
->objfile
));
23560 /* Follow reference OFFSET.
23561 On entry *REF_CU is the CU of the source die referencing OFFSET.
23562 On exit *REF_CU is the CU of the result.
23563 Returns NULL if OFFSET is invalid. */
23565 static struct die_info
*
23566 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
23567 struct dwarf2_cu
**ref_cu
)
23569 struct die_info temp_die
;
23570 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
23571 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
23573 gdb_assert (cu
->per_cu
!= NULL
);
23577 if (cu
->per_cu
->is_debug_types
)
23579 /* .debug_types CUs cannot reference anything outside their CU.
23580 If they need to, they have to reference a signatured type via
23581 DW_FORM_ref_sig8. */
23582 if (!cu
->header
.offset_in_cu_p (sect_off
))
23585 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
23586 || !cu
->header
.offset_in_cu_p (sect_off
))
23588 struct dwarf2_per_cu_data
*per_cu
;
23590 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
23593 /* If necessary, add it to the queue and load its DIEs. */
23594 if (maybe_queue_comp_unit (cu
, per_cu
, per_objfile
, cu
->language
))
23595 load_full_comp_unit (per_cu
, per_objfile
, per_objfile
->get_cu (per_cu
),
23596 false, cu
->language
);
23598 target_cu
= per_objfile
->get_cu (per_cu
);
23600 else if (cu
->dies
== NULL
)
23602 /* We're loading full DIEs during partial symbol reading. */
23603 gdb_assert (per_objfile
->per_bfd
->reading_partial_symbols
);
23604 load_full_comp_unit (cu
->per_cu
, per_objfile
, cu
, false,
23608 *ref_cu
= target_cu
;
23609 temp_die
.sect_off
= sect_off
;
23611 if (target_cu
!= cu
)
23612 target_cu
->ancestor
= cu
;
23614 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
23616 to_underlying (sect_off
));
23619 /* Follow reference attribute ATTR of SRC_DIE.
23620 On entry *REF_CU is the CU of SRC_DIE.
23621 On exit *REF_CU is the CU of the result. */
23623 static struct die_info
*
23624 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
23625 struct dwarf2_cu
**ref_cu
)
23627 sect_offset sect_off
= attr
->get_ref_die_offset ();
23628 struct dwarf2_cu
*cu
= *ref_cu
;
23629 struct die_info
*die
;
23631 die
= follow_die_offset (sect_off
,
23632 (attr
->form
== DW_FORM_GNU_ref_alt
23633 || cu
->per_cu
->is_dwz
),
23636 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
23637 "at %s [in module %s]"),
23638 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
23639 objfile_name (cu
->per_objfile
->objfile
));
23646 struct dwarf2_locexpr_baton
23647 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
23648 dwarf2_per_cu_data
*per_cu
,
23649 dwarf2_per_objfile
*per_objfile
,
23650 gdb::function_view
<CORE_ADDR ()> get_frame_pc
,
23651 bool resolve_abstract_p
)
23653 struct die_info
*die
;
23654 struct attribute
*attr
;
23655 struct dwarf2_locexpr_baton retval
;
23656 struct objfile
*objfile
= per_objfile
->objfile
;
23658 dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
23660 cu
= load_cu (per_cu
, per_objfile
, false);
23664 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23665 Instead just throw an error, not much else we can do. */
23666 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23667 sect_offset_str (sect_off
), objfile_name (objfile
));
23670 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23672 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23673 sect_offset_str (sect_off
), objfile_name (objfile
));
23675 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
23676 if (!attr
&& resolve_abstract_p
23677 && (per_objfile
->per_bfd
->abstract_to_concrete
.find (die
->sect_off
)
23678 != per_objfile
->per_bfd
->abstract_to_concrete
.end ()))
23680 CORE_ADDR pc
= get_frame_pc ();
23681 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
23682 struct gdbarch
*gdbarch
= objfile
->arch ();
23684 for (const auto &cand_off
23685 : per_objfile
->per_bfd
->abstract_to_concrete
[die
->sect_off
])
23687 struct dwarf2_cu
*cand_cu
= cu
;
23688 struct die_info
*cand
23689 = follow_die_offset (cand_off
, per_cu
->is_dwz
, &cand_cu
);
23692 || cand
->parent
->tag
!= DW_TAG_subprogram
)
23695 CORE_ADDR pc_low
, pc_high
;
23696 get_scope_pc_bounds (cand
->parent
, &pc_low
, &pc_high
, cu
);
23697 if (pc_low
== ((CORE_ADDR
) -1))
23699 pc_low
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_low
+ baseaddr
);
23700 pc_high
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_high
+ baseaddr
);
23701 if (!(pc_low
<= pc
&& pc
< pc_high
))
23705 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
23712 /* DWARF: "If there is no such attribute, then there is no effect.".
23713 DATA is ignored if SIZE is 0. */
23715 retval
.data
= NULL
;
23718 else if (attr
->form_is_section_offset ())
23720 struct dwarf2_loclist_baton loclist_baton
;
23721 CORE_ADDR pc
= get_frame_pc ();
23724 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
23726 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
23728 retval
.size
= size
;
23732 if (!attr
->form_is_block ())
23733 error (_("Dwarf Error: DIE at %s referenced in module %s "
23734 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
23735 sect_offset_str (sect_off
), objfile_name (objfile
));
23737 struct dwarf_block
*block
= attr
->as_block ();
23738 retval
.data
= block
->data
;
23739 retval
.size
= block
->size
;
23741 retval
.per_objfile
= per_objfile
;
23742 retval
.per_cu
= cu
->per_cu
;
23744 per_objfile
->age_comp_units ();
23751 struct dwarf2_locexpr_baton
23752 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
23753 dwarf2_per_cu_data
*per_cu
,
23754 dwarf2_per_objfile
*per_objfile
,
23755 gdb::function_view
<CORE_ADDR ()> get_frame_pc
)
23757 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
23759 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, per_objfile
,
23763 /* Write a constant of a given type as target-ordered bytes into
23766 static const gdb_byte
*
23767 write_constant_as_bytes (struct obstack
*obstack
,
23768 enum bfd_endian byte_order
,
23775 *len
= TYPE_LENGTH (type
);
23776 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23777 store_unsigned_integer (result
, *len
, byte_order
, value
);
23785 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
23786 dwarf2_per_cu_data
*per_cu
,
23787 dwarf2_per_objfile
*per_objfile
,
23791 struct die_info
*die
;
23792 struct attribute
*attr
;
23793 const gdb_byte
*result
= NULL
;
23796 enum bfd_endian byte_order
;
23797 struct objfile
*objfile
= per_objfile
->objfile
;
23799 dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
23801 cu
= load_cu (per_cu
, per_objfile
, false);
23805 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23806 Instead just throw an error, not much else we can do. */
23807 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23808 sect_offset_str (sect_off
), objfile_name (objfile
));
23811 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23813 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23814 sect_offset_str (sect_off
), objfile_name (objfile
));
23816 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
23820 byte_order
= (bfd_big_endian (objfile
->obfd
)
23821 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
23823 switch (attr
->form
)
23826 case DW_FORM_addrx
:
23827 case DW_FORM_GNU_addr_index
:
23831 *len
= cu
->header
.addr_size
;
23832 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23833 store_unsigned_integer (tem
, *len
, byte_order
, attr
->as_address ());
23837 case DW_FORM_string
:
23840 case DW_FORM_GNU_str_index
:
23841 case DW_FORM_GNU_strp_alt
:
23842 /* The string is already allocated on the objfile obstack, point
23845 const char *attr_name
= attr
->as_string ();
23846 result
= (const gdb_byte
*) attr_name
;
23847 *len
= strlen (attr_name
);
23850 case DW_FORM_block1
:
23851 case DW_FORM_block2
:
23852 case DW_FORM_block4
:
23853 case DW_FORM_block
:
23854 case DW_FORM_exprloc
:
23855 case DW_FORM_data16
:
23857 struct dwarf_block
*block
= attr
->as_block ();
23858 result
= block
->data
;
23859 *len
= block
->size
;
23863 /* The DW_AT_const_value attributes are supposed to carry the
23864 symbol's value "represented as it would be on the target
23865 architecture." By the time we get here, it's already been
23866 converted to host endianness, so we just need to sign- or
23867 zero-extend it as appropriate. */
23868 case DW_FORM_data1
:
23869 type
= die_type (die
, cu
);
23870 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
23871 if (result
== NULL
)
23872 result
= write_constant_as_bytes (obstack
, byte_order
,
23875 case DW_FORM_data2
:
23876 type
= die_type (die
, cu
);
23877 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
23878 if (result
== NULL
)
23879 result
= write_constant_as_bytes (obstack
, byte_order
,
23882 case DW_FORM_data4
:
23883 type
= die_type (die
, cu
);
23884 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
23885 if (result
== NULL
)
23886 result
= write_constant_as_bytes (obstack
, byte_order
,
23889 case DW_FORM_data8
:
23890 type
= die_type (die
, cu
);
23891 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
23892 if (result
== NULL
)
23893 result
= write_constant_as_bytes (obstack
, byte_order
,
23897 case DW_FORM_sdata
:
23898 case DW_FORM_implicit_const
:
23899 type
= die_type (die
, cu
);
23900 result
= write_constant_as_bytes (obstack
, byte_order
,
23901 type
, attr
->as_signed (), len
);
23904 case DW_FORM_udata
:
23905 type
= die_type (die
, cu
);
23906 result
= write_constant_as_bytes (obstack
, byte_order
,
23907 type
, attr
->as_unsigned (), len
);
23911 complaint (_("unsupported const value attribute form: '%s'"),
23912 dwarf_form_name (attr
->form
));
23922 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
23923 dwarf2_per_cu_data
*per_cu
,
23924 dwarf2_per_objfile
*per_objfile
)
23926 struct die_info
*die
;
23928 dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
23930 cu
= load_cu (per_cu
, per_objfile
, false);
23935 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23939 return die_type (die
, cu
);
23945 dwarf2_get_die_type (cu_offset die_offset
,
23946 dwarf2_per_cu_data
*per_cu
,
23947 dwarf2_per_objfile
*per_objfile
)
23949 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
23950 return get_die_type_at_offset (die_offset_sect
, per_cu
, per_objfile
);
23953 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
23954 On entry *REF_CU is the CU of SRC_DIE.
23955 On exit *REF_CU is the CU of the result.
23956 Returns NULL if the referenced DIE isn't found. */
23958 static struct die_info
*
23959 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
23960 struct dwarf2_cu
**ref_cu
)
23962 struct die_info temp_die
;
23963 struct dwarf2_cu
*sig_cu
, *cu
= *ref_cu
;
23964 struct die_info
*die
;
23965 dwarf2_per_objfile
*per_objfile
= (*ref_cu
)->per_objfile
;
23968 /* While it might be nice to assert sig_type->type == NULL here,
23969 we can get here for DW_AT_imported_declaration where we need
23970 the DIE not the type. */
23972 /* If necessary, add it to the queue and load its DIEs. */
23974 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, per_objfile
,
23976 read_signatured_type (sig_type
, per_objfile
);
23978 sig_cu
= per_objfile
->get_cu (&sig_type
->per_cu
);
23979 gdb_assert (sig_cu
!= NULL
);
23980 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
23981 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
23982 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
23983 to_underlying (temp_die
.sect_off
));
23986 /* For .gdb_index version 7 keep track of included TUs.
23987 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
23988 if (per_objfile
->per_bfd
->index_table
!= NULL
23989 && per_objfile
->per_bfd
->index_table
->version
<= 7)
23991 (*ref_cu
)->per_cu
->imported_symtabs_push (sig_cu
->per_cu
);
23996 sig_cu
->ancestor
= cu
;
24004 /* Follow signatured type referenced by ATTR in SRC_DIE.
24005 On entry *REF_CU is the CU of SRC_DIE.
24006 On exit *REF_CU is the CU of the result.
24007 The result is the DIE of the type.
24008 If the referenced type cannot be found an error is thrown. */
24010 static struct die_info
*
24011 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
24012 struct dwarf2_cu
**ref_cu
)
24014 ULONGEST signature
= attr
->as_signature ();
24015 struct signatured_type
*sig_type
;
24016 struct die_info
*die
;
24018 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
24020 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
24021 /* sig_type will be NULL if the signatured type is missing from
24023 if (sig_type
== NULL
)
24025 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
24026 " from DIE at %s [in module %s]"),
24027 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
24028 objfile_name ((*ref_cu
)->per_objfile
->objfile
));
24031 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
24034 dump_die_for_error (src_die
);
24035 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
24036 " from DIE at %s [in module %s]"),
24037 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
24038 objfile_name ((*ref_cu
)->per_objfile
->objfile
));
24044 /* Get the type specified by SIGNATURE referenced in DIE/CU,
24045 reading in and processing the type unit if necessary. */
24047 static struct type
*
24048 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
24049 struct dwarf2_cu
*cu
)
24051 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
24052 struct signatured_type
*sig_type
;
24053 struct dwarf2_cu
*type_cu
;
24054 struct die_info
*type_die
;
24057 sig_type
= lookup_signatured_type (cu
, signature
);
24058 /* sig_type will be NULL if the signatured type is missing from
24060 if (sig_type
== NULL
)
24062 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
24063 " from DIE at %s [in module %s]"),
24064 hex_string (signature
), sect_offset_str (die
->sect_off
),
24065 objfile_name (per_objfile
->objfile
));
24066 return build_error_marker_type (cu
, die
);
24069 /* If we already know the type we're done. */
24070 type
= per_objfile
->get_type_for_signatured_type (sig_type
);
24071 if (type
!= nullptr)
24075 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
24076 if (type_die
!= NULL
)
24078 /* N.B. We need to call get_die_type to ensure only one type for this DIE
24079 is created. This is important, for example, because for c++ classes
24080 we need TYPE_NAME set which is only done by new_symbol. Blech. */
24081 type
= read_type_die (type_die
, type_cu
);
24084 complaint (_("Dwarf Error: Cannot build signatured type %s"
24085 " referenced from DIE at %s [in module %s]"),
24086 hex_string (signature
), sect_offset_str (die
->sect_off
),
24087 objfile_name (per_objfile
->objfile
));
24088 type
= build_error_marker_type (cu
, die
);
24093 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
24094 " from DIE at %s [in module %s]"),
24095 hex_string (signature
), sect_offset_str (die
->sect_off
),
24096 objfile_name (per_objfile
->objfile
));
24097 type
= build_error_marker_type (cu
, die
);
24100 per_objfile
->set_type_for_signatured_type (sig_type
, type
);
24105 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
24106 reading in and processing the type unit if necessary. */
24108 static struct type
*
24109 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
24110 struct dwarf2_cu
*cu
) /* ARI: editCase function */
24112 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
24113 if (attr
->form_is_ref ())
24115 struct dwarf2_cu
*type_cu
= cu
;
24116 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
24118 return read_type_die (type_die
, type_cu
);
24120 else if (attr
->form
== DW_FORM_ref_sig8
)
24122 return get_signatured_type (die
, attr
->as_signature (), cu
);
24126 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
24128 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
24129 " at %s [in module %s]"),
24130 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
24131 objfile_name (per_objfile
->objfile
));
24132 return build_error_marker_type (cu
, die
);
24136 /* Load the DIEs associated with type unit PER_CU into memory. */
24139 load_full_type_unit (dwarf2_per_cu_data
*per_cu
,
24140 dwarf2_per_objfile
*per_objfile
)
24142 struct signatured_type
*sig_type
;
24144 /* Caller is responsible for ensuring type_unit_groups don't get here. */
24145 gdb_assert (! per_cu
->type_unit_group_p ());
24147 /* We have the per_cu, but we need the signatured_type.
24148 Fortunately this is an easy translation. */
24149 gdb_assert (per_cu
->is_debug_types
);
24150 sig_type
= (struct signatured_type
*) per_cu
;
24152 gdb_assert (per_objfile
->get_cu (per_cu
) == nullptr);
24154 read_signatured_type (sig_type
, per_objfile
);
24156 gdb_assert (per_objfile
->get_cu (per_cu
) != nullptr);
24159 /* Read in a signatured type and build its CU and DIEs.
24160 If the type is a stub for the real type in a DWO file,
24161 read in the real type from the DWO file as well. */
24164 read_signatured_type (signatured_type
*sig_type
,
24165 dwarf2_per_objfile
*per_objfile
)
24167 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
24169 gdb_assert (per_cu
->is_debug_types
);
24170 gdb_assert (per_objfile
->get_cu (per_cu
) == nullptr);
24172 cutu_reader
reader (per_cu
, per_objfile
, nullptr, nullptr, false);
24174 if (!reader
.dummy_p
)
24176 struct dwarf2_cu
*cu
= reader
.cu
;
24177 const gdb_byte
*info_ptr
= reader
.info_ptr
;
24179 gdb_assert (cu
->die_hash
== NULL
);
24181 htab_create_alloc_ex (cu
->header
.length
/ 12,
24185 &cu
->comp_unit_obstack
,
24186 hashtab_obstack_allocate
,
24187 dummy_obstack_deallocate
);
24189 if (reader
.comp_unit_die
->has_children
)
24190 reader
.comp_unit_die
->child
24191 = read_die_and_siblings (&reader
, info_ptr
, &info_ptr
,
24192 reader
.comp_unit_die
);
24193 cu
->dies
= reader
.comp_unit_die
;
24194 /* comp_unit_die is not stored in die_hash, no need. */
24196 /* We try not to read any attributes in this function, because
24197 not all CUs needed for references have been loaded yet, and
24198 symbol table processing isn't initialized. But we have to
24199 set the CU language, or we won't be able to build types
24200 correctly. Similarly, if we do not read the producer, we can
24201 not apply producer-specific interpretation. */
24202 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
24207 sig_type
->per_cu
.tu_read
= 1;
24210 /* Decode simple location descriptions.
24211 Given a pointer to a dwarf block that defines a location, compute
24212 the location and return the value. If COMPUTED is non-null, it is
24213 set to true to indicate that decoding was successful, and false
24214 otherwise. If COMPUTED is null, then this function may emit a
24218 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
, bool *computed
)
24220 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
24222 size_t size
= blk
->size
;
24223 const gdb_byte
*data
= blk
->data
;
24224 CORE_ADDR stack
[64];
24226 unsigned int bytes_read
, unsnd
;
24229 if (computed
!= nullptr)
24235 stack
[++stacki
] = 0;
24274 stack
[++stacki
] = op
- DW_OP_lit0
;
24309 stack
[++stacki
] = op
- DW_OP_reg0
;
24312 if (computed
== nullptr)
24313 dwarf2_complex_location_expr_complaint ();
24320 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
24322 stack
[++stacki
] = unsnd
;
24325 if (computed
== nullptr)
24326 dwarf2_complex_location_expr_complaint ();
24333 stack
[++stacki
] = cu
->header
.read_address (objfile
->obfd
, &data
[i
],
24338 case DW_OP_const1u
:
24339 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
24343 case DW_OP_const1s
:
24344 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
24348 case DW_OP_const2u
:
24349 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
24353 case DW_OP_const2s
:
24354 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
24358 case DW_OP_const4u
:
24359 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
24363 case DW_OP_const4s
:
24364 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
24368 case DW_OP_const8u
:
24369 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
24374 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
24380 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
24385 stack
[stacki
+ 1] = stack
[stacki
];
24390 stack
[stacki
- 1] += stack
[stacki
];
24394 case DW_OP_plus_uconst
:
24395 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
24401 stack
[stacki
- 1] -= stack
[stacki
];
24406 /* If we're not the last op, then we definitely can't encode
24407 this using GDB's address_class enum. This is valid for partial
24408 global symbols, although the variable's address will be bogus
24412 if (computed
== nullptr)
24413 dwarf2_complex_location_expr_complaint ();
24419 case DW_OP_GNU_push_tls_address
:
24420 case DW_OP_form_tls_address
:
24421 /* The top of the stack has the offset from the beginning
24422 of the thread control block at which the variable is located. */
24423 /* Nothing should follow this operator, so the top of stack would
24425 /* This is valid for partial global symbols, but the variable's
24426 address will be bogus in the psymtab. Make it always at least
24427 non-zero to not look as a variable garbage collected by linker
24428 which have DW_OP_addr 0. */
24431 if (computed
== nullptr)
24432 dwarf2_complex_location_expr_complaint ();
24439 case DW_OP_GNU_uninit
:
24440 if (computed
!= nullptr)
24445 case DW_OP_GNU_addr_index
:
24446 case DW_OP_GNU_const_index
:
24447 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
24453 if (computed
== nullptr)
24455 const char *name
= get_DW_OP_name (op
);
24458 complaint (_("unsupported stack op: '%s'"),
24461 complaint (_("unsupported stack op: '%02x'"),
24465 return (stack
[stacki
]);
24468 /* Enforce maximum stack depth of SIZE-1 to avoid writing
24469 outside of the allocated space. Also enforce minimum>0. */
24470 if (stacki
>= ARRAY_SIZE (stack
) - 1)
24472 if (computed
== nullptr)
24473 complaint (_("location description stack overflow"));
24479 if (computed
== nullptr)
24480 complaint (_("location description stack underflow"));
24485 if (computed
!= nullptr)
24487 return (stack
[stacki
]);
24490 /* memory allocation interface */
24492 static struct dwarf_block
*
24493 dwarf_alloc_block (struct dwarf2_cu
*cu
)
24495 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
24498 static struct die_info
*
24499 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
24501 struct die_info
*die
;
24502 size_t size
= sizeof (struct die_info
);
24505 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
24507 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
24508 memset (die
, 0, sizeof (struct die_info
));
24514 /* Macro support. */
24516 /* An overload of dwarf_decode_macros that finds the correct section
24517 and ensures it is read in before calling the other overload. */
24520 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
24521 int section_is_gnu
)
24523 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
24524 struct objfile
*objfile
= per_objfile
->objfile
;
24525 const struct line_header
*lh
= cu
->line_header
;
24526 unsigned int offset_size
= cu
->header
.offset_size
;
24527 struct dwarf2_section_info
*section
;
24528 const char *section_name
;
24530 if (cu
->dwo_unit
!= nullptr)
24532 if (section_is_gnu
)
24534 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
24535 section_name
= ".debug_macro.dwo";
24539 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
24540 section_name
= ".debug_macinfo.dwo";
24545 if (section_is_gnu
)
24547 section
= &per_objfile
->per_bfd
->macro
;
24548 section_name
= ".debug_macro";
24552 section
= &per_objfile
->per_bfd
->macinfo
;
24553 section_name
= ".debug_macinfo";
24557 section
->read (objfile
);
24558 if (section
->buffer
== nullptr)
24560 complaint (_("missing %s section"), section_name
);
24564 buildsym_compunit
*builder
= cu
->get_builder ();
24566 struct dwarf2_section_info
*str_offsets_section
;
24567 struct dwarf2_section_info
*str_section
;
24568 ULONGEST str_offsets_base
;
24570 if (cu
->dwo_unit
!= nullptr)
24572 str_offsets_section
= &cu
->dwo_unit
->dwo_file
24573 ->sections
.str_offsets
;
24574 str_section
= &cu
->dwo_unit
->dwo_file
->sections
.str
;
24575 str_offsets_base
= cu
->header
.addr_size
;
24579 str_offsets_section
= &per_objfile
->per_bfd
->str_offsets
;
24580 str_section
= &per_objfile
->per_bfd
->str
;
24581 str_offsets_base
= *cu
->str_offsets_base
;
24584 dwarf_decode_macros (per_objfile
, builder
, section
, lh
,
24585 offset_size
, offset
, str_section
, str_offsets_section
,
24586 str_offsets_base
, section_is_gnu
);
24589 /* Return the .debug_loc section to use for CU.
24590 For DWO files use .debug_loc.dwo. */
24592 static struct dwarf2_section_info
*
24593 cu_debug_loc_section (struct dwarf2_cu
*cu
)
24595 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
24599 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
24601 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
24603 return (cu
->header
.version
>= 5 ? &per_objfile
->per_bfd
->loclists
24604 : &per_objfile
->per_bfd
->loc
);
24607 /* Return the .debug_rnglists section to use for CU. */
24608 static struct dwarf2_section_info
*
24609 cu_debug_rnglists_section (struct dwarf2_cu
*cu
, dwarf_tag tag
)
24611 if (cu
->header
.version
< 5)
24612 error (_(".debug_rnglists section cannot be used in DWARF %d"),
24613 cu
->header
.version
);
24614 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
24616 /* Make sure we read the .debug_rnglists section from the file that
24617 contains the DW_AT_ranges attribute we are reading. Normally that
24618 would be the .dwo file, if there is one. However for DW_TAG_compile_unit
24619 or DW_TAG_skeleton unit, we always want to read from objfile/linked
24621 if (cu
->dwo_unit
!= nullptr
24622 && tag
!= DW_TAG_compile_unit
24623 && tag
!= DW_TAG_skeleton_unit
)
24625 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
24627 if (sections
->rnglists
.size
> 0)
24628 return §ions
->rnglists
;
24630 error (_(".debug_rnglists section is missing from .dwo file."));
24632 return &dwarf2_per_objfile
->per_bfd
->rnglists
;
24635 /* A helper function that fills in a dwarf2_loclist_baton. */
24638 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
24639 struct dwarf2_loclist_baton
*baton
,
24640 const struct attribute
*attr
)
24642 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
24643 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24645 section
->read (per_objfile
->objfile
);
24647 baton
->per_objfile
= per_objfile
;
24648 baton
->per_cu
= cu
->per_cu
;
24649 gdb_assert (baton
->per_cu
);
24650 /* We don't know how long the location list is, but make sure we
24651 don't run off the edge of the section. */
24652 baton
->size
= section
->size
- attr
->as_unsigned ();
24653 baton
->data
= section
->buffer
+ attr
->as_unsigned ();
24654 if (cu
->base_address
.has_value ())
24655 baton
->base_address
= *cu
->base_address
;
24657 baton
->base_address
= 0;
24658 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
24662 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
24663 struct dwarf2_cu
*cu
, int is_block
)
24665 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
24666 struct objfile
*objfile
= per_objfile
->objfile
;
24667 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24669 if (attr
->form_is_section_offset ()
24670 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
24671 the section. If so, fall through to the complaint in the
24673 && attr
->as_unsigned () < section
->get_size (objfile
))
24675 struct dwarf2_loclist_baton
*baton
;
24677 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
24679 fill_in_loclist_baton (cu
, baton
, attr
);
24681 if (!cu
->base_address
.has_value ())
24682 complaint (_("Location list used without "
24683 "specifying the CU base address."));
24685 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24686 ? dwarf2_loclist_block_index
24687 : dwarf2_loclist_index
);
24688 SYMBOL_LOCATION_BATON (sym
) = baton
;
24692 struct dwarf2_locexpr_baton
*baton
;
24694 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
24695 baton
->per_objfile
= per_objfile
;
24696 baton
->per_cu
= cu
->per_cu
;
24697 gdb_assert (baton
->per_cu
);
24699 if (attr
->form_is_block ())
24701 /* Note that we're just copying the block's data pointer
24702 here, not the actual data. We're still pointing into the
24703 info_buffer for SYM's objfile; right now we never release
24704 that buffer, but when we do clean up properly this may
24706 struct dwarf_block
*block
= attr
->as_block ();
24707 baton
->size
= block
->size
;
24708 baton
->data
= block
->data
;
24712 dwarf2_invalid_attrib_class_complaint ("location description",
24713 sym
->natural_name ());
24717 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24718 ? dwarf2_locexpr_block_index
24719 : dwarf2_locexpr_index
);
24720 SYMBOL_LOCATION_BATON (sym
) = baton
;
24726 const comp_unit_head
*
24727 dwarf2_per_cu_data::get_header () const
24729 if (!m_header_read_in
)
24731 const gdb_byte
*info_ptr
24732 = this->section
->buffer
+ to_underlying (this->sect_off
);
24734 memset (&m_header
, 0, sizeof (m_header
));
24736 read_comp_unit_head (&m_header
, info_ptr
, this->section
,
24737 rcuh_kind::COMPILE
);
24746 dwarf2_per_cu_data::addr_size () const
24748 return this->get_header ()->addr_size
;
24754 dwarf2_per_cu_data::offset_size () const
24756 return this->get_header ()->offset_size
;
24762 dwarf2_per_cu_data::ref_addr_size () const
24764 const comp_unit_head
*header
= this->get_header ();
24766 if (header
->version
== 2)
24767 return header
->addr_size
;
24769 return header
->offset_size
;
24775 dwarf2_cu::addr_type () const
24777 struct objfile
*objfile
= this->per_objfile
->objfile
;
24778 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
24779 struct type
*addr_type
= lookup_pointer_type (void_type
);
24780 int addr_size
= this->per_cu
->addr_size ();
24782 if (TYPE_LENGTH (addr_type
) == addr_size
)
24785 addr_type
= addr_sized_int_type (addr_type
->is_unsigned ());
24789 /* A helper function for dwarf2_find_containing_comp_unit that returns
24790 the index of the result, and that searches a vector. It will
24791 return a result even if the offset in question does not actually
24792 occur in any CU. This is separate so that it can be unit
24796 dwarf2_find_containing_comp_unit
24797 (sect_offset sect_off
,
24798 unsigned int offset_in_dwz
,
24799 const std::vector
<dwarf2_per_cu_data
*> &all_comp_units
)
24804 high
= all_comp_units
.size () - 1;
24807 struct dwarf2_per_cu_data
*mid_cu
;
24808 int mid
= low
+ (high
- low
) / 2;
24810 mid_cu
= all_comp_units
[mid
];
24811 if (mid_cu
->is_dwz
> offset_in_dwz
24812 || (mid_cu
->is_dwz
== offset_in_dwz
24813 && mid_cu
->sect_off
+ mid_cu
->length
> sect_off
))
24818 gdb_assert (low
== high
);
24822 /* Locate the .debug_info compilation unit from CU's objfile which contains
24823 the DIE at OFFSET. Raises an error on failure. */
24825 static struct dwarf2_per_cu_data
*
24826 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
24827 unsigned int offset_in_dwz
,
24828 dwarf2_per_objfile
*per_objfile
)
24830 int low
= dwarf2_find_containing_comp_unit
24831 (sect_off
, offset_in_dwz
, per_objfile
->per_bfd
->all_comp_units
);
24832 dwarf2_per_cu_data
*this_cu
= per_objfile
->per_bfd
->all_comp_units
[low
];
24834 if (this_cu
->is_dwz
!= offset_in_dwz
|| this_cu
->sect_off
> sect_off
)
24836 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
24837 error (_("Dwarf Error: could not find partial DIE containing "
24838 "offset %s [in module %s]"),
24839 sect_offset_str (sect_off
),
24840 bfd_get_filename (per_objfile
->objfile
->obfd
));
24842 gdb_assert (per_objfile
->per_bfd
->all_comp_units
[low
-1]->sect_off
24844 return per_objfile
->per_bfd
->all_comp_units
[low
-1];
24848 if (low
== per_objfile
->per_bfd
->all_comp_units
.size () - 1
24849 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
24850 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
24851 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
24858 namespace selftests
{
24859 namespace find_containing_comp_unit
{
24864 struct dwarf2_per_cu_data one
{};
24865 struct dwarf2_per_cu_data two
{};
24866 struct dwarf2_per_cu_data three
{};
24867 struct dwarf2_per_cu_data four
{};
24870 two
.sect_off
= sect_offset (one
.length
);
24875 four
.sect_off
= sect_offset (three
.length
);
24879 std::vector
<dwarf2_per_cu_data
*> units
;
24880 units
.push_back (&one
);
24881 units
.push_back (&two
);
24882 units
.push_back (&three
);
24883 units
.push_back (&four
);
24887 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 0, units
);
24888 SELF_CHECK (units
[result
] == &one
);
24889 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 0, units
);
24890 SELF_CHECK (units
[result
] == &one
);
24891 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 0, units
);
24892 SELF_CHECK (units
[result
] == &two
);
24894 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 1, units
);
24895 SELF_CHECK (units
[result
] == &three
);
24896 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 1, units
);
24897 SELF_CHECK (units
[result
] == &three
);
24898 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 1, units
);
24899 SELF_CHECK (units
[result
] == &four
);
24905 #endif /* GDB_SELF_TEST */
24907 /* Initialize dwarf2_cu to read PER_CU, in the context of PER_OBJFILE. */
24909 dwarf2_cu::dwarf2_cu (dwarf2_per_cu_data
*per_cu
,
24910 dwarf2_per_objfile
*per_objfile
)
24912 per_objfile (per_objfile
),
24914 has_loclist (false),
24915 checked_producer (false),
24916 producer_is_gxx_lt_4_6 (false),
24917 producer_is_gcc_lt_4_3 (false),
24918 producer_is_icc (false),
24919 producer_is_icc_lt_14 (false),
24920 producer_is_codewarrior (false),
24921 processing_has_namespace_info (false)
24925 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
24928 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
24929 enum language pretend_language
)
24931 struct attribute
*attr
;
24933 /* Set the language we're debugging. */
24934 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
24935 if (attr
!= nullptr)
24936 set_cu_language (attr
->constant_value (0), cu
);
24939 cu
->language
= pretend_language
;
24940 cu
->language_defn
= language_def (cu
->language
);
24943 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
24949 dwarf2_per_objfile::get_cu (dwarf2_per_cu_data
*per_cu
)
24951 auto it
= m_dwarf2_cus
.find (per_cu
);
24952 if (it
== m_dwarf2_cus
.end ())
24961 dwarf2_per_objfile::set_cu (dwarf2_per_cu_data
*per_cu
, dwarf2_cu
*cu
)
24963 gdb_assert (this->get_cu (per_cu
) == nullptr);
24965 m_dwarf2_cus
[per_cu
] = cu
;
24971 dwarf2_per_objfile::age_comp_units ()
24973 /* Start by clearing all marks. */
24974 for (auto pair
: m_dwarf2_cus
)
24975 pair
.second
->mark
= false;
24977 /* Traverse all CUs, mark them and their dependencies if used recently
24979 for (auto pair
: m_dwarf2_cus
)
24981 dwarf2_cu
*cu
= pair
.second
;
24984 if (cu
->last_used
<= dwarf_max_cache_age
)
24988 /* Delete all CUs still not marked. */
24989 for (auto it
= m_dwarf2_cus
.begin (); it
!= m_dwarf2_cus
.end ();)
24991 dwarf2_cu
*cu
= it
->second
;
24996 it
= m_dwarf2_cus
.erase (it
);
25006 dwarf2_per_objfile::remove_cu (dwarf2_per_cu_data
*per_cu
)
25008 auto it
= m_dwarf2_cus
.find (per_cu
);
25009 if (it
== m_dwarf2_cus
.end ())
25014 m_dwarf2_cus
.erase (it
);
25017 dwarf2_per_objfile::~dwarf2_per_objfile ()
25022 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
25023 We store these in a hash table separate from the DIEs, and preserve them
25024 when the DIEs are flushed out of cache.
25026 The CU "per_cu" pointer is needed because offset alone is not enough to
25027 uniquely identify the type. A file may have multiple .debug_types sections,
25028 or the type may come from a DWO file. Furthermore, while it's more logical
25029 to use per_cu->section+offset, with Fission the section with the data is in
25030 the DWO file but we don't know that section at the point we need it.
25031 We have to use something in dwarf2_per_cu_data (or the pointer to it)
25032 because we can enter the lookup routine, get_die_type_at_offset, from
25033 outside this file, and thus won't necessarily have PER_CU->cu.
25034 Fortunately, PER_CU is stable for the life of the objfile. */
25036 struct dwarf2_per_cu_offset_and_type
25038 const struct dwarf2_per_cu_data
*per_cu
;
25039 sect_offset sect_off
;
25043 /* Hash function for a dwarf2_per_cu_offset_and_type. */
25046 per_cu_offset_and_type_hash (const void *item
)
25048 const struct dwarf2_per_cu_offset_and_type
*ofs
25049 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
25051 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
25054 /* Equality function for a dwarf2_per_cu_offset_and_type. */
25057 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
25059 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
25060 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
25061 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
25062 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
25064 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
25065 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
25068 /* Set the type associated with DIE to TYPE. Save it in CU's hash
25069 table if necessary. For convenience, return TYPE.
25071 The DIEs reading must have careful ordering to:
25072 * Not cause infinite loops trying to read in DIEs as a prerequisite for
25073 reading current DIE.
25074 * Not trying to dereference contents of still incompletely read in types
25075 while reading in other DIEs.
25076 * Enable referencing still incompletely read in types just by a pointer to
25077 the type without accessing its fields.
25079 Therefore caller should follow these rules:
25080 * Try to fetch any prerequisite types we may need to build this DIE type
25081 before building the type and calling set_die_type.
25082 * After building type call set_die_type for current DIE as soon as
25083 possible before fetching more types to complete the current type.
25084 * Make the type as complete as possible before fetching more types. */
25086 static struct type
*
25087 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
25088 bool skip_data_location
)
25090 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
25091 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
25092 struct objfile
*objfile
= per_objfile
->objfile
;
25093 struct attribute
*attr
;
25094 struct dynamic_prop prop
;
25096 /* For Ada types, make sure that the gnat-specific data is always
25097 initialized (if not already set). There are a few types where
25098 we should not be doing so, because the type-specific area is
25099 already used to hold some other piece of info (eg: TYPE_CODE_FLT
25100 where the type-specific area is used to store the floatformat).
25101 But this is not a problem, because the gnat-specific information
25102 is actually not needed for these types. */
25103 if (need_gnat_info (cu
)
25104 && type
->code () != TYPE_CODE_FUNC
25105 && type
->code () != TYPE_CODE_FLT
25106 && type
->code () != TYPE_CODE_METHODPTR
25107 && type
->code () != TYPE_CODE_MEMBERPTR
25108 && type
->code () != TYPE_CODE_METHOD
25109 && type
->code () != TYPE_CODE_FIXED_POINT
25110 && !HAVE_GNAT_AUX_INFO (type
))
25111 INIT_GNAT_SPECIFIC (type
);
25113 /* Read DW_AT_allocated and set in type. */
25114 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
25117 struct type
*prop_type
= cu
->addr_sized_int_type (false);
25118 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
25119 type
->add_dyn_prop (DYN_PROP_ALLOCATED
, prop
);
25122 /* Read DW_AT_associated and set in type. */
25123 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
25126 struct type
*prop_type
= cu
->addr_sized_int_type (false);
25127 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
25128 type
->add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
);
25131 /* Read DW_AT_data_location and set in type. */
25132 if (!skip_data_location
)
25134 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
25135 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, cu
->addr_type ()))
25136 type
->add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
);
25139 if (per_objfile
->die_type_hash
== NULL
)
25140 per_objfile
->die_type_hash
25141 = htab_up (htab_create_alloc (127,
25142 per_cu_offset_and_type_hash
,
25143 per_cu_offset_and_type_eq
,
25144 NULL
, xcalloc
, xfree
));
25146 ofs
.per_cu
= cu
->per_cu
;
25147 ofs
.sect_off
= die
->sect_off
;
25149 slot
= (struct dwarf2_per_cu_offset_and_type
**)
25150 htab_find_slot (per_objfile
->die_type_hash
.get (), &ofs
, INSERT
);
25152 complaint (_("A problem internal to GDB: DIE %s has type already set"),
25153 sect_offset_str (die
->sect_off
));
25154 *slot
= XOBNEW (&objfile
->objfile_obstack
,
25155 struct dwarf2_per_cu_offset_and_type
);
25160 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
25161 or return NULL if the die does not have a saved type. */
25163 static struct type
*
25164 get_die_type_at_offset (sect_offset sect_off
,
25165 dwarf2_per_cu_data
*per_cu
,
25166 dwarf2_per_objfile
*per_objfile
)
25168 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
25170 if (per_objfile
->die_type_hash
== NULL
)
25173 ofs
.per_cu
= per_cu
;
25174 ofs
.sect_off
= sect_off
;
25175 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
25176 htab_find (per_objfile
->die_type_hash
.get (), &ofs
));
25183 /* Look up the type for DIE in CU in die_type_hash,
25184 or return NULL if DIE does not have a saved type. */
25186 static struct type
*
25187 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
25189 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
, cu
->per_objfile
);
25192 /* Add a dependence relationship from CU to REF_PER_CU. */
25195 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
25196 struct dwarf2_per_cu_data
*ref_per_cu
)
25200 if (cu
->dependencies
== NULL
)
25202 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
25203 NULL
, &cu
->comp_unit_obstack
,
25204 hashtab_obstack_allocate
,
25205 dummy_obstack_deallocate
);
25207 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
25209 *slot
= ref_per_cu
;
25212 /* Subroutine of dwarf2_mark to pass to htab_traverse.
25213 Set the mark field in every compilation unit in the
25214 cache that we must keep because we are keeping CU.
25216 DATA is the dwarf2_per_objfile object in which to look up CUs. */
25219 dwarf2_mark_helper (void **slot
, void *data
)
25221 dwarf2_per_cu_data
*per_cu
= (dwarf2_per_cu_data
*) *slot
;
25222 dwarf2_per_objfile
*per_objfile
= (dwarf2_per_objfile
*) data
;
25223 dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
25225 /* cu->dependencies references may not yet have been ever read if QUIT aborts
25226 reading of the chain. As such dependencies remain valid it is not much
25227 useful to track and undo them during QUIT cleanups. */
25236 if (cu
->dependencies
!= nullptr)
25237 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, per_objfile
);
25242 /* Set the mark field in CU and in every other compilation unit in the
25243 cache that we must keep because we are keeping CU. */
25246 dwarf2_mark (struct dwarf2_cu
*cu
)
25253 if (cu
->dependencies
!= nullptr)
25254 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, cu
->per_objfile
);
25257 /* Trivial hash function for partial_die_info: the hash value of a DIE
25258 is its offset in .debug_info for this objfile. */
25261 partial_die_hash (const void *item
)
25263 const struct partial_die_info
*part_die
25264 = (const struct partial_die_info
*) item
;
25266 return to_underlying (part_die
->sect_off
);
25269 /* Trivial comparison function for partial_die_info structures: two DIEs
25270 are equal if they have the same offset. */
25273 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
25275 const struct partial_die_info
*part_die_lhs
25276 = (const struct partial_die_info
*) item_lhs
;
25277 const struct partial_die_info
*part_die_rhs
25278 = (const struct partial_die_info
*) item_rhs
;
25280 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
25283 struct cmd_list_element
*set_dwarf_cmdlist
;
25284 struct cmd_list_element
*show_dwarf_cmdlist
;
25287 show_check_physname (struct ui_file
*file
, int from_tty
,
25288 struct cmd_list_element
*c
, const char *value
)
25290 fprintf_filtered (file
,
25291 _("Whether to check \"physname\" is %s.\n"),
25295 void _initialize_dwarf2_read ();
25297 _initialize_dwarf2_read ()
25299 add_basic_prefix_cmd ("dwarf", class_maintenance
, _("\
25300 Set DWARF specific variables.\n\
25301 Configure DWARF variables such as the cache size."),
25302 &set_dwarf_cmdlist
, "maintenance set dwarf ",
25303 0/*allow-unknown*/, &maintenance_set_cmdlist
);
25305 add_show_prefix_cmd ("dwarf", class_maintenance
, _("\
25306 Show DWARF specific variables.\n\
25307 Show DWARF variables such as the cache size."),
25308 &show_dwarf_cmdlist
, "maintenance show dwarf ",
25309 0/*allow-unknown*/, &maintenance_show_cmdlist
);
25311 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
25312 &dwarf_max_cache_age
, _("\
25313 Set the upper bound on the age of cached DWARF compilation units."), _("\
25314 Show the upper bound on the age of cached DWARF compilation units."), _("\
25315 A higher limit means that cached compilation units will be stored\n\
25316 in memory longer, and more total memory will be used. Zero disables\n\
25317 caching, which can slow down startup."),
25319 show_dwarf_max_cache_age
,
25320 &set_dwarf_cmdlist
,
25321 &show_dwarf_cmdlist
);
25323 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
25324 Set debugging of the DWARF reader."), _("\
25325 Show debugging of the DWARF reader."), _("\
25326 When enabled (non-zero), debugging messages are printed during DWARF\n\
25327 reading and symtab expansion. A value of 1 (one) provides basic\n\
25328 information. A value greater than 1 provides more verbose information."),
25331 &setdebuglist
, &showdebuglist
);
25333 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
25334 Set debugging of the DWARF DIE reader."), _("\
25335 Show debugging of the DWARF DIE reader."), _("\
25336 When enabled (non-zero), DIEs are dumped after they are read in.\n\
25337 The value is the maximum depth to print."),
25340 &setdebuglist
, &showdebuglist
);
25342 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
25343 Set debugging of the dwarf line reader."), _("\
25344 Show debugging of the dwarf line reader."), _("\
25345 When enabled (non-zero), line number entries are dumped as they are read in.\n\
25346 A value of 1 (one) provides basic information.\n\
25347 A value greater than 1 provides more verbose information."),
25350 &setdebuglist
, &showdebuglist
);
25352 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
25353 Set cross-checking of \"physname\" code against demangler."), _("\
25354 Show cross-checking of \"physname\" code against demangler."), _("\
25355 When enabled, GDB's internal \"physname\" code is checked against\n\
25357 NULL
, show_check_physname
,
25358 &setdebuglist
, &showdebuglist
);
25360 add_setshow_boolean_cmd ("use-deprecated-index-sections",
25361 no_class
, &use_deprecated_index_sections
, _("\
25362 Set whether to use deprecated gdb_index sections."), _("\
25363 Show whether to use deprecated gdb_index sections."), _("\
25364 When enabled, deprecated .gdb_index sections are used anyway.\n\
25365 Normally they are ignored either because of a missing feature or\n\
25366 performance issue.\n\
25367 Warning: This option must be enabled before gdb reads the file."),
25370 &setlist
, &showlist
);
25372 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25373 &dwarf2_locexpr_funcs
);
25374 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25375 &dwarf2_loclist_funcs
);
25377 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25378 &dwarf2_block_frame_base_locexpr_funcs
);
25379 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25380 &dwarf2_block_frame_base_loclist_funcs
);
25383 selftests::register_test ("dw2_expand_symtabs_matching",
25384 selftests::dw2_expand_symtabs_matching::run_test
);
25385 selftests::register_test ("dwarf2_find_containing_comp_unit",
25386 selftests::find_containing_comp_unit::run_test
);