1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2020 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 /* When non-zero, dump DIEs after they are read in. */
97 static unsigned int dwarf_die_debug
= 0;
99 /* When non-zero, dump line number entries as they are read in. */
100 unsigned int dwarf_line_debug
= 0;
102 /* When true, cross-check physname against demangler. */
103 static bool check_physname
= false;
105 /* When true, do not reject deprecated .gdb_index sections. */
106 static bool use_deprecated_index_sections
= false;
108 static const struct objfile_key
<dwarf2_per_objfile
> dwarf2_objfile_data_key
;
110 /* The "aclass" indices for various kinds of computed DWARF symbols. */
112 static int dwarf2_locexpr_index
;
113 static int dwarf2_loclist_index
;
114 static int dwarf2_locexpr_block_index
;
115 static int dwarf2_loclist_block_index
;
117 /* Size of .debug_loclists section header for 32-bit DWARF format. */
118 #define LOCLIST_HEADER_SIZE32 12
120 /* Size of .debug_loclists section header for 64-bit DWARF format. */
121 #define LOCLIST_HEADER_SIZE64 20
123 /* An index into a (C++) symbol name component in a symbol name as
124 recorded in the mapped_index's symbol table. For each C++ symbol
125 in the symbol table, we record one entry for the start of each
126 component in the symbol in a table of name components, and then
127 sort the table, in order to be able to binary search symbol names,
128 ignoring leading namespaces, both completion and regular look up.
129 For example, for symbol "A::B::C", we'll have an entry that points
130 to "A::B::C", another that points to "B::C", and another for "C".
131 Note that function symbols in GDB index have no parameter
132 information, just the function/method names. You can convert a
133 name_component to a "const char *" using the
134 'mapped_index::symbol_name_at(offset_type)' method. */
136 struct name_component
138 /* Offset in the symbol name where the component starts. Stored as
139 a (32-bit) offset instead of a pointer to save memory and improve
140 locality on 64-bit architectures. */
141 offset_type name_offset
;
143 /* The symbol's index in the symbol and constant pool tables of a
148 /* Base class containing bits shared by both .gdb_index and
149 .debug_name indexes. */
151 struct mapped_index_base
153 mapped_index_base () = default;
154 DISABLE_COPY_AND_ASSIGN (mapped_index_base
);
156 /* The name_component table (a sorted vector). See name_component's
157 description above. */
158 std::vector
<name_component
> name_components
;
160 /* How NAME_COMPONENTS is sorted. */
161 enum case_sensitivity name_components_casing
;
163 /* Return the number of names in the symbol table. */
164 virtual size_t symbol_name_count () const = 0;
166 /* Get the name of the symbol at IDX in the symbol table. */
167 virtual const char *symbol_name_at (offset_type idx
) const = 0;
169 /* Return whether the name at IDX in the symbol table should be
171 virtual bool symbol_name_slot_invalid (offset_type idx
) const
176 /* Build the symbol name component sorted vector, if we haven't
178 void build_name_components ();
180 /* Returns the lower (inclusive) and upper (exclusive) bounds of the
181 possible matches for LN_NO_PARAMS in the name component
183 std::pair
<std::vector
<name_component
>::const_iterator
,
184 std::vector
<name_component
>::const_iterator
>
185 find_name_components_bounds (const lookup_name_info
&ln_no_params
,
186 enum language lang
) const;
188 /* Prevent deleting/destroying via a base class pointer. */
190 ~mapped_index_base() = default;
193 /* A description of the mapped index. The file format is described in
194 a comment by the code that writes the index. */
195 struct mapped_index final
: public mapped_index_base
197 /* A slot/bucket in the symbol table hash. */
198 struct symbol_table_slot
200 const offset_type name
;
201 const offset_type vec
;
204 /* Index data format version. */
207 /* The address table data. */
208 gdb::array_view
<const gdb_byte
> address_table
;
210 /* The symbol table, implemented as a hash table. */
211 gdb::array_view
<symbol_table_slot
> symbol_table
;
213 /* A pointer to the constant pool. */
214 const char *constant_pool
= nullptr;
216 bool symbol_name_slot_invalid (offset_type idx
) const override
218 const auto &bucket
= this->symbol_table
[idx
];
219 return bucket
.name
== 0 && bucket
.vec
== 0;
222 /* Convenience method to get at the name of the symbol at IDX in the
224 const char *symbol_name_at (offset_type idx
) const override
225 { return this->constant_pool
+ MAYBE_SWAP (this->symbol_table
[idx
].name
); }
227 size_t symbol_name_count () const override
228 { return this->symbol_table
.size (); }
231 /* A description of the mapped .debug_names.
232 Uninitialized map has CU_COUNT 0. */
233 struct mapped_debug_names final
: public mapped_index_base
235 mapped_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile_
)
236 : dwarf2_per_objfile (dwarf2_per_objfile_
)
239 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
240 bfd_endian dwarf5_byte_order
;
241 bool dwarf5_is_dwarf64
;
242 bool augmentation_is_gdb
;
244 uint32_t cu_count
= 0;
245 uint32_t tu_count
, bucket_count
, name_count
;
246 const gdb_byte
*cu_table_reordered
, *tu_table_reordered
;
247 const uint32_t *bucket_table_reordered
, *hash_table_reordered
;
248 const gdb_byte
*name_table_string_offs_reordered
;
249 const gdb_byte
*name_table_entry_offs_reordered
;
250 const gdb_byte
*entry_pool
;
257 /* Attribute name DW_IDX_*. */
260 /* Attribute form DW_FORM_*. */
263 /* Value if FORM is DW_FORM_implicit_const. */
264 LONGEST implicit_const
;
266 std::vector
<attr
> attr_vec
;
269 std::unordered_map
<ULONGEST
, index_val
> abbrev_map
;
271 const char *namei_to_name (uint32_t namei
) const;
273 /* Implementation of the mapped_index_base virtual interface, for
274 the name_components cache. */
276 const char *symbol_name_at (offset_type idx
) const override
277 { return namei_to_name (idx
); }
279 size_t symbol_name_count () const override
280 { return this->name_count
; }
283 /* See dwarf2read.h. */
286 get_dwarf2_per_objfile (struct objfile
*objfile
)
288 return dwarf2_objfile_data_key
.get (objfile
);
291 /* Default names of the debugging sections. */
293 /* Note that if the debugging section has been compressed, it might
294 have a name like .zdebug_info. */
296 static const struct dwarf2_debug_sections dwarf2_elf_names
=
298 { ".debug_info", ".zdebug_info" },
299 { ".debug_abbrev", ".zdebug_abbrev" },
300 { ".debug_line", ".zdebug_line" },
301 { ".debug_loc", ".zdebug_loc" },
302 { ".debug_loclists", ".zdebug_loclists" },
303 { ".debug_macinfo", ".zdebug_macinfo" },
304 { ".debug_macro", ".zdebug_macro" },
305 { ".debug_str", ".zdebug_str" },
306 { ".debug_str_offsets", ".zdebug_str_offsets" },
307 { ".debug_line_str", ".zdebug_line_str" },
308 { ".debug_ranges", ".zdebug_ranges" },
309 { ".debug_rnglists", ".zdebug_rnglists" },
310 { ".debug_types", ".zdebug_types" },
311 { ".debug_addr", ".zdebug_addr" },
312 { ".debug_frame", ".zdebug_frame" },
313 { ".eh_frame", NULL
},
314 { ".gdb_index", ".zgdb_index" },
315 { ".debug_names", ".zdebug_names" },
316 { ".debug_aranges", ".zdebug_aranges" },
320 /* List of DWO/DWP sections. */
322 static const struct dwop_section_names
324 struct dwarf2_section_names abbrev_dwo
;
325 struct dwarf2_section_names info_dwo
;
326 struct dwarf2_section_names line_dwo
;
327 struct dwarf2_section_names loc_dwo
;
328 struct dwarf2_section_names loclists_dwo
;
329 struct dwarf2_section_names macinfo_dwo
;
330 struct dwarf2_section_names macro_dwo
;
331 struct dwarf2_section_names str_dwo
;
332 struct dwarf2_section_names str_offsets_dwo
;
333 struct dwarf2_section_names types_dwo
;
334 struct dwarf2_section_names cu_index
;
335 struct dwarf2_section_names tu_index
;
339 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
340 { ".debug_info.dwo", ".zdebug_info.dwo" },
341 { ".debug_line.dwo", ".zdebug_line.dwo" },
342 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
343 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
344 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
345 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
346 { ".debug_str.dwo", ".zdebug_str.dwo" },
347 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
348 { ".debug_types.dwo", ".zdebug_types.dwo" },
349 { ".debug_cu_index", ".zdebug_cu_index" },
350 { ".debug_tu_index", ".zdebug_tu_index" },
353 /* local data types */
355 /* The location list section (.debug_loclists) begins with a header,
356 which contains the following information. */
357 struct loclist_header
359 /* A 4-byte or 12-byte length containing the length of the
360 set of entries for this compilation unit, not including the
361 length field itself. */
364 /* A 2-byte version identifier. */
367 /* A 1-byte unsigned integer containing the size in bytes of an address on
368 the target system. */
369 unsigned char addr_size
;
371 /* A 1-byte unsigned integer containing the size in bytes of a segment selector
372 on the target system. */
373 unsigned char segment_collector_size
;
375 /* A 4-byte count of the number of offsets that follow the header. */
376 unsigned int offset_entry_count
;
379 /* Type used for delaying computation of method physnames.
380 See comments for compute_delayed_physnames. */
381 struct delayed_method_info
383 /* The type to which the method is attached, i.e., its parent class. */
386 /* The index of the method in the type's function fieldlists. */
389 /* The index of the method in the fieldlist. */
392 /* The name of the DIE. */
395 /* The DIE associated with this method. */
396 struct die_info
*die
;
399 /* Internal state when decoding a particular compilation unit. */
402 explicit dwarf2_cu (dwarf2_per_cu_data
*per_cu
,
403 dwarf2_per_objfile
*per_objfile
);
406 DISABLE_COPY_AND_ASSIGN (dwarf2_cu
);
408 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
409 Create the set of symtabs used by this TU, or if this TU is sharing
410 symtabs with another TU and the symtabs have already been created
411 then restore those symtabs in the line header.
412 We don't need the pc/line-number mapping for type units. */
413 void setup_type_unit_groups (struct die_info
*die
);
415 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
416 buildsym_compunit constructor. */
417 struct compunit_symtab
*start_symtab (const char *name
,
418 const char *comp_dir
,
421 /* Reset the builder. */
422 void reset_builder () { m_builder
.reset (); }
424 /* Return a type that is a generic pointer type, the size of which
425 matches the address size given in the compilation unit header for
427 struct type
*addr_type () const;
429 /* Find an integer type the same size as the address size given in
430 the compilation unit header for this CU. UNSIGNED_P controls if
431 the integer is unsigned or not. */
432 struct type
*addr_sized_int_type (bool unsigned_p
) const;
434 /* The header of the compilation unit. */
435 struct comp_unit_head header
{};
437 /* Base address of this compilation unit. */
438 gdb::optional
<CORE_ADDR
> base_address
;
440 /* The language we are debugging. */
441 enum language language
= language_unknown
;
442 const struct language_defn
*language_defn
= nullptr;
444 const char *producer
= nullptr;
447 /* The symtab builder for this CU. This is only non-NULL when full
448 symbols are being read. */
449 std::unique_ptr
<buildsym_compunit
> m_builder
;
452 /* The generic symbol table building routines have separate lists for
453 file scope symbols and all all other scopes (local scopes). So
454 we need to select the right one to pass to add_symbol_to_list().
455 We do it by keeping a pointer to the correct list in list_in_scope.
457 FIXME: The original dwarf code just treated the file scope as the
458 first local scope, and all other local scopes as nested local
459 scopes, and worked fine. Check to see if we really need to
460 distinguish these in buildsym.c. */
461 struct pending
**list_in_scope
= nullptr;
463 /* Hash table holding all the loaded partial DIEs
464 with partial_die->offset.SECT_OFF as hash. */
465 htab_t partial_dies
= nullptr;
467 /* Storage for things with the same lifetime as this read-in compilation
468 unit, including partial DIEs. */
469 auto_obstack comp_unit_obstack
;
471 /* When multiple dwarf2_cu structures are living in memory, this field
472 chains them all together, so that they can be released efficiently.
473 We will probably also want a generation counter so that most-recently-used
474 compilation units are cached... */
475 struct dwarf2_per_cu_data
*read_in_chain
= nullptr;
477 /* Backlink to our per_cu entry. */
478 struct dwarf2_per_cu_data
*per_cu
;
480 /* The dwarf2_per_objfile that owns this. */
481 struct dwarf2_per_objfile
*per_objfile
;
483 /* How many compilation units ago was this CU last referenced? */
486 /* A hash table of DIE cu_offset for following references with
487 die_info->offset.sect_off as hash. */
488 htab_t die_hash
= nullptr;
490 /* Full DIEs if read in. */
491 struct die_info
*dies
= nullptr;
493 /* A set of pointers to dwarf2_per_cu_data objects for compilation
494 units referenced by this one. Only set during full symbol processing;
495 partial symbol tables do not have dependencies. */
496 htab_t dependencies
= nullptr;
498 /* Header data from the line table, during full symbol processing. */
499 struct line_header
*line_header
= nullptr;
500 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
501 it's owned by dwarf2_per_bfd::line_header_hash. If non-NULL,
502 this is the DW_TAG_compile_unit die for this CU. We'll hold on
503 to the line header as long as this DIE is being processed. See
504 process_die_scope. */
505 die_info
*line_header_die_owner
= nullptr;
507 /* A list of methods which need to have physnames computed
508 after all type information has been read. */
509 std::vector
<delayed_method_info
> method_list
;
511 /* To be copied to symtab->call_site_htab. */
512 htab_t call_site_htab
= nullptr;
514 /* Non-NULL if this CU came from a DWO file.
515 There is an invariant here that is important to remember:
516 Except for attributes copied from the top level DIE in the "main"
517 (or "stub") file in preparation for reading the DWO file
518 (e.g., DW_AT_addr_base), we KISS: there is only *one* CU.
519 Either there isn't a DWO file (in which case this is NULL and the point
520 is moot), or there is and either we're not going to read it (in which
521 case this is NULL) or there is and we are reading it (in which case this
523 struct dwo_unit
*dwo_unit
= nullptr;
525 /* The DW_AT_addr_base (DW_AT_GNU_addr_base) attribute if present.
526 Note this value comes from the Fission stub CU/TU's DIE. */
527 gdb::optional
<ULONGEST
> addr_base
;
529 /* The DW_AT_rnglists_base attribute if present.
530 Note this value comes from the Fission stub CU/TU's DIE.
531 Also note that the value is zero in the non-DWO case so this value can
532 be used without needing to know whether DWO files are in use or not.
533 N.B. This does not apply to DW_AT_ranges appearing in
534 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
535 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
536 DW_AT_rnglists_base *would* have to be applied, and we'd have to care
537 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
538 ULONGEST ranges_base
= 0;
540 /* The DW_AT_loclists_base attribute if present. */
541 ULONGEST loclist_base
= 0;
543 /* When reading debug info generated by older versions of rustc, we
544 have to rewrite some union types to be struct types with a
545 variant part. This rewriting must be done after the CU is fully
546 read in, because otherwise at the point of rewriting some struct
547 type might not have been fully processed. So, we keep a list of
548 all such types here and process them after expansion. */
549 std::vector
<struct type
*> rust_unions
;
551 /* The DW_AT_str_offsets_base attribute if present. For DWARF 4 version DWO
552 files, the value is implicitly zero. For DWARF 5 version DWO files, the
553 value is often implicit and is the size of the header of
554 .debug_str_offsets section (8 or 4, depending on the address size). */
555 gdb::optional
<ULONGEST
> str_offsets_base
;
557 /* Mark used when releasing cached dies. */
560 /* This CU references .debug_loc. See the symtab->locations_valid field.
561 This test is imperfect as there may exist optimized debug code not using
562 any location list and still facing inlining issues if handled as
563 unoptimized code. For a future better test see GCC PR other/32998. */
564 bool has_loclist
: 1;
566 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is true
567 if all the producer_is_* fields are valid. This information is cached
568 because profiling CU expansion showed excessive time spent in
569 producer_is_gxx_lt_4_6. */
570 bool checked_producer
: 1;
571 bool producer_is_gxx_lt_4_6
: 1;
572 bool producer_is_gcc_lt_4_3
: 1;
573 bool producer_is_icc
: 1;
574 bool producer_is_icc_lt_14
: 1;
575 bool producer_is_codewarrior
: 1;
577 /* When true, the file that we're processing is known to have
578 debugging info for C++ namespaces. GCC 3.3.x did not produce
579 this information, but later versions do. */
581 bool processing_has_namespace_info
: 1;
583 struct partial_die_info
*find_partial_die (sect_offset sect_off
);
585 /* If this CU was inherited by another CU (via specification,
586 abstract_origin, etc), this is the ancestor CU. */
589 /* Get the buildsym_compunit for this CU. */
590 buildsym_compunit
*get_builder ()
592 /* If this CU has a builder associated with it, use that. */
593 if (m_builder
!= nullptr)
594 return m_builder
.get ();
596 /* Otherwise, search ancestors for a valid builder. */
597 if (ancestor
!= nullptr)
598 return ancestor
->get_builder ();
604 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
605 This includes type_unit_group and quick_file_names. */
607 struct stmt_list_hash
609 /* The DWO unit this table is from or NULL if there is none. */
610 struct dwo_unit
*dwo_unit
;
612 /* Offset in .debug_line or .debug_line.dwo. */
613 sect_offset line_sect_off
;
616 /* Each element of dwarf2_per_bfd->type_unit_groups is a pointer to
617 an object of this type. */
619 struct type_unit_group
621 /* dwarf2read.c's main "handle" on a TU symtab.
622 To simplify things we create an artificial CU that "includes" all the
623 type units using this stmt_list so that the rest of the code still has
624 a "per_cu" handle on the symtab. */
625 struct dwarf2_per_cu_data per_cu
;
627 /* The TUs that share this DW_AT_stmt_list entry.
628 This is added to while parsing type units to build partial symtabs,
629 and is deleted afterwards and not used again. */
630 std::vector
<signatured_type
*> *tus
;
632 /* The compunit symtab.
633 Type units in a group needn't all be defined in the same source file,
634 so we create an essentially anonymous symtab as the compunit symtab. */
635 struct compunit_symtab
*compunit_symtab
;
637 /* The data used to construct the hash key. */
638 struct stmt_list_hash hash
;
640 /* The symbol tables for this TU (obtained from the files listed in
642 WARNING: The order of entries here must match the order of entries
643 in the line header. After the first TU using this type_unit_group, the
644 line header for the subsequent TUs is recreated from this. This is done
645 because we need to use the same symtabs for each TU using the same
646 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
647 there's no guarantee the line header doesn't have duplicate entries. */
648 struct symtab
**symtabs
;
651 /* These sections are what may appear in a (real or virtual) DWO file. */
655 struct dwarf2_section_info abbrev
;
656 struct dwarf2_section_info line
;
657 struct dwarf2_section_info loc
;
658 struct dwarf2_section_info loclists
;
659 struct dwarf2_section_info macinfo
;
660 struct dwarf2_section_info macro
;
661 struct dwarf2_section_info str
;
662 struct dwarf2_section_info str_offsets
;
663 /* In the case of a virtual DWO file, these two are unused. */
664 struct dwarf2_section_info info
;
665 std::vector
<dwarf2_section_info
> types
;
668 /* CUs/TUs in DWP/DWO files. */
672 /* Backlink to the containing struct dwo_file. */
673 struct dwo_file
*dwo_file
;
675 /* The "id" that distinguishes this CU/TU.
676 .debug_info calls this "dwo_id", .debug_types calls this "signature".
677 Since signatures came first, we stick with it for consistency. */
680 /* The section this CU/TU lives in, in the DWO file. */
681 struct dwarf2_section_info
*section
;
683 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
684 sect_offset sect_off
;
687 /* For types, offset in the type's DIE of the type defined by this TU. */
688 cu_offset type_offset_in_tu
;
691 /* include/dwarf2.h defines the DWP section codes.
692 It defines a max value but it doesn't define a min value, which we
693 use for error checking, so provide one. */
695 enum dwp_v2_section_ids
700 /* Data for one DWO file.
702 This includes virtual DWO files (a virtual DWO file is a DWO file as it
703 appears in a DWP file). DWP files don't really have DWO files per se -
704 comdat folding of types "loses" the DWO file they came from, and from
705 a high level view DWP files appear to contain a mass of random types.
706 However, to maintain consistency with the non-DWP case we pretend DWP
707 files contain virtual DWO files, and we assign each TU with one virtual
708 DWO file (generally based on the line and abbrev section offsets -
709 a heuristic that seems to work in practice). */
713 dwo_file () = default;
714 DISABLE_COPY_AND_ASSIGN (dwo_file
);
716 /* The DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute.
717 For virtual DWO files the name is constructed from the section offsets
718 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
719 from related CU+TUs. */
720 const char *dwo_name
= nullptr;
722 /* The DW_AT_comp_dir attribute. */
723 const char *comp_dir
= nullptr;
725 /* The bfd, when the file is open. Otherwise this is NULL.
726 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
727 gdb_bfd_ref_ptr dbfd
;
729 /* The sections that make up this DWO file.
730 Remember that for virtual DWO files in DWP V2, these are virtual
731 sections (for lack of a better name). */
732 struct dwo_sections sections
{};
734 /* The CUs in the file.
735 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
736 an extension to handle LLVM's Link Time Optimization output (where
737 multiple source files may be compiled into a single object/dwo pair). */
740 /* Table of TUs in the file.
741 Each element is a struct dwo_unit. */
745 /* These sections are what may appear in a DWP file. */
749 /* These are used by both DWP version 1 and 2. */
750 struct dwarf2_section_info str
;
751 struct dwarf2_section_info cu_index
;
752 struct dwarf2_section_info tu_index
;
754 /* These are only used by DWP version 2 files.
755 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
756 sections are referenced by section number, and are not recorded here.
757 In DWP version 2 there is at most one copy of all these sections, each
758 section being (effectively) comprised of the concatenation of all of the
759 individual sections that exist in the version 1 format.
760 To keep the code simple we treat each of these concatenated pieces as a
761 section itself (a virtual section?). */
762 struct dwarf2_section_info abbrev
;
763 struct dwarf2_section_info info
;
764 struct dwarf2_section_info line
;
765 struct dwarf2_section_info loc
;
766 struct dwarf2_section_info macinfo
;
767 struct dwarf2_section_info macro
;
768 struct dwarf2_section_info str_offsets
;
769 struct dwarf2_section_info types
;
772 /* These sections are what may appear in a virtual DWO file in DWP version 1.
773 A virtual DWO file is a DWO file as it appears in a DWP file. */
775 struct virtual_v1_dwo_sections
777 struct dwarf2_section_info abbrev
;
778 struct dwarf2_section_info line
;
779 struct dwarf2_section_info loc
;
780 struct dwarf2_section_info macinfo
;
781 struct dwarf2_section_info macro
;
782 struct dwarf2_section_info str_offsets
;
783 /* Each DWP hash table entry records one CU or one TU.
784 That is recorded here, and copied to dwo_unit.section. */
785 struct dwarf2_section_info info_or_types
;
788 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
789 In version 2, the sections of the DWO files are concatenated together
790 and stored in one section of that name. Thus each ELF section contains
791 several "virtual" sections. */
793 struct virtual_v2_dwo_sections
795 bfd_size_type abbrev_offset
;
796 bfd_size_type abbrev_size
;
798 bfd_size_type line_offset
;
799 bfd_size_type line_size
;
801 bfd_size_type loc_offset
;
802 bfd_size_type loc_size
;
804 bfd_size_type macinfo_offset
;
805 bfd_size_type macinfo_size
;
807 bfd_size_type macro_offset
;
808 bfd_size_type macro_size
;
810 bfd_size_type str_offsets_offset
;
811 bfd_size_type str_offsets_size
;
813 /* Each DWP hash table entry records one CU or one TU.
814 That is recorded here, and copied to dwo_unit.section. */
815 bfd_size_type info_or_types_offset
;
816 bfd_size_type info_or_types_size
;
819 /* Contents of DWP hash tables. */
821 struct dwp_hash_table
823 uint32_t version
, nr_columns
;
824 uint32_t nr_units
, nr_slots
;
825 const gdb_byte
*hash_table
, *unit_table
;
830 const gdb_byte
*indices
;
834 /* This is indexed by column number and gives the id of the section
836 #define MAX_NR_V2_DWO_SECTIONS \
837 (1 /* .debug_info or .debug_types */ \
838 + 1 /* .debug_abbrev */ \
839 + 1 /* .debug_line */ \
840 + 1 /* .debug_loc */ \
841 + 1 /* .debug_str_offsets */ \
842 + 1 /* .debug_macro or .debug_macinfo */)
843 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
844 const gdb_byte
*offsets
;
845 const gdb_byte
*sizes
;
850 /* Data for one DWP file. */
854 dwp_file (const char *name_
, gdb_bfd_ref_ptr
&&abfd
)
856 dbfd (std::move (abfd
))
860 /* Name of the file. */
863 /* File format version. */
867 gdb_bfd_ref_ptr dbfd
;
869 /* Section info for this file. */
870 struct dwp_sections sections
{};
872 /* Table of CUs in the file. */
873 const struct dwp_hash_table
*cus
= nullptr;
875 /* Table of TUs in the file. */
876 const struct dwp_hash_table
*tus
= nullptr;
878 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
882 /* Table to map ELF section numbers to their sections.
883 This is only needed for the DWP V1 file format. */
884 unsigned int num_sections
= 0;
885 asection
**elf_sections
= nullptr;
888 /* Struct used to pass misc. parameters to read_die_and_children, et
889 al. which are used for both .debug_info and .debug_types dies.
890 All parameters here are unchanging for the life of the call. This
891 struct exists to abstract away the constant parameters of die reading. */
893 struct die_reader_specs
895 /* The bfd of die_section. */
898 /* The CU of the DIE we are parsing. */
899 struct dwarf2_cu
*cu
;
901 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
902 struct dwo_file
*dwo_file
;
904 /* The section the die comes from.
905 This is either .debug_info or .debug_types, or the .dwo variants. */
906 struct dwarf2_section_info
*die_section
;
908 /* die_section->buffer. */
909 const gdb_byte
*buffer
;
911 /* The end of the buffer. */
912 const gdb_byte
*buffer_end
;
914 /* The abbreviation table to use when reading the DIEs. */
915 struct abbrev_table
*abbrev_table
;
918 /* A subclass of die_reader_specs that holds storage and has complex
919 constructor and destructor behavior. */
921 class cutu_reader
: public die_reader_specs
925 cutu_reader (dwarf2_per_cu_data
*this_cu
,
926 dwarf2_per_objfile
*per_objfile
,
927 struct abbrev_table
*abbrev_table
,
931 explicit cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
932 dwarf2_per_objfile
*per_objfile
,
933 struct dwarf2_cu
*parent_cu
= nullptr,
934 struct dwo_file
*dwo_file
= nullptr);
936 DISABLE_COPY_AND_ASSIGN (cutu_reader
);
938 const gdb_byte
*info_ptr
= nullptr;
939 struct die_info
*comp_unit_die
= nullptr;
940 bool dummy_p
= false;
942 /* Release the new CU, putting it on the chain. This cannot be done
947 void init_tu_and_read_dwo_dies (dwarf2_per_cu_data
*this_cu
,
948 dwarf2_per_objfile
*per_objfile
,
949 int use_existing_cu
);
951 struct dwarf2_per_cu_data
*m_this_cu
;
952 std::unique_ptr
<dwarf2_cu
> m_new_cu
;
954 /* The ordinary abbreviation table. */
955 abbrev_table_up m_abbrev_table_holder
;
957 /* The DWO abbreviation table. */
958 abbrev_table_up m_dwo_abbrev_table
;
961 /* When we construct a partial symbol table entry we only
962 need this much information. */
963 struct partial_die_info
: public allocate_on_obstack
965 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
967 /* Disable assign but still keep copy ctor, which is needed
968 load_partial_dies. */
969 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
971 /* Adjust the partial die before generating a symbol for it. This
972 function may set the is_external flag or change the DIE's
974 void fixup (struct dwarf2_cu
*cu
);
976 /* Read a minimal amount of information into the minimal die
978 const gdb_byte
*read (const struct die_reader_specs
*reader
,
979 const struct abbrev_info
&abbrev
,
980 const gdb_byte
*info_ptr
);
982 /* Offset of this DIE. */
983 const sect_offset sect_off
;
985 /* DWARF-2 tag for this DIE. */
986 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
988 /* Assorted flags describing the data found in this DIE. */
989 const unsigned int has_children
: 1;
991 unsigned int is_external
: 1;
992 unsigned int is_declaration
: 1;
993 unsigned int has_type
: 1;
994 unsigned int has_specification
: 1;
995 unsigned int has_pc_info
: 1;
996 unsigned int may_be_inlined
: 1;
998 /* This DIE has been marked DW_AT_main_subprogram. */
999 unsigned int main_subprogram
: 1;
1001 /* Flag set if the SCOPE field of this structure has been
1003 unsigned int scope_set
: 1;
1005 /* Flag set if the DIE has a byte_size attribute. */
1006 unsigned int has_byte_size
: 1;
1008 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1009 unsigned int has_const_value
: 1;
1011 /* Flag set if any of the DIE's children are template arguments. */
1012 unsigned int has_template_arguments
: 1;
1014 /* Flag set if fixup has been called on this die. */
1015 unsigned int fixup_called
: 1;
1017 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1018 unsigned int is_dwz
: 1;
1020 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1021 unsigned int spec_is_dwz
: 1;
1023 /* The name of this DIE. Normally the value of DW_AT_name, but
1024 sometimes a default name for unnamed DIEs. */
1025 const char *name
= nullptr;
1027 /* The linkage name, if present. */
1028 const char *linkage_name
= nullptr;
1030 /* The scope to prepend to our children. This is generally
1031 allocated on the comp_unit_obstack, so will disappear
1032 when this compilation unit leaves the cache. */
1033 const char *scope
= nullptr;
1035 /* Some data associated with the partial DIE. The tag determines
1036 which field is live. */
1039 /* The location description associated with this DIE, if any. */
1040 struct dwarf_block
*locdesc
;
1041 /* The offset of an import, for DW_TAG_imported_unit. */
1042 sect_offset sect_off
;
1045 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1046 CORE_ADDR lowpc
= 0;
1047 CORE_ADDR highpc
= 0;
1049 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1050 DW_AT_sibling, if any. */
1051 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1052 could return DW_AT_sibling values to its caller load_partial_dies. */
1053 const gdb_byte
*sibling
= nullptr;
1055 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1056 DW_AT_specification (or DW_AT_abstract_origin or
1057 DW_AT_extension). */
1058 sect_offset spec_offset
{};
1060 /* Pointers to this DIE's parent, first child, and next sibling,
1062 struct partial_die_info
*die_parent
= nullptr;
1063 struct partial_die_info
*die_child
= nullptr;
1064 struct partial_die_info
*die_sibling
= nullptr;
1066 friend struct partial_die_info
*
1067 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1070 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1071 partial_die_info (sect_offset sect_off
)
1072 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1076 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1078 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1083 has_specification
= 0;
1086 main_subprogram
= 0;
1089 has_const_value
= 0;
1090 has_template_arguments
= 0;
1097 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1098 but this would require a corresponding change in unpack_field_as_long
1100 static int bits_per_byte
= 8;
1102 struct variant_part_builder
;
1104 /* When reading a variant, we track a bit more information about the
1105 field, and store it in an object of this type. */
1107 struct variant_field
1109 int first_field
= -1;
1110 int last_field
= -1;
1112 /* A variant can contain other variant parts. */
1113 std::vector
<variant_part_builder
> variant_parts
;
1115 /* If we see a DW_TAG_variant, then this will be set if this is the
1117 bool default_branch
= false;
1118 /* If we see a DW_AT_discr_value, then this will be the discriminant
1120 ULONGEST discriminant_value
= 0;
1121 /* If we see a DW_AT_discr_list, then this is a pointer to the list
1123 struct dwarf_block
*discr_list_data
= nullptr;
1126 /* This represents a DW_TAG_variant_part. */
1128 struct variant_part_builder
1130 /* The offset of the discriminant field. */
1131 sect_offset discriminant_offset
{};
1133 /* Variants that are direct children of this variant part. */
1134 std::vector
<variant_field
> variants
;
1136 /* True if we're currently reading a variant. */
1137 bool processing_variant
= false;
1142 int accessibility
= 0;
1144 /* Variant parts need to find the discriminant, which is a DIE
1145 reference. We track the section offset of each field to make
1148 struct field field
{};
1153 const char *name
= nullptr;
1154 std::vector
<struct fn_field
> fnfields
;
1157 /* The routines that read and process dies for a C struct or C++ class
1158 pass lists of data member fields and lists of member function fields
1159 in an instance of a field_info structure, as defined below. */
1162 /* List of data member and baseclasses fields. */
1163 std::vector
<struct nextfield
> fields
;
1164 std::vector
<struct nextfield
> baseclasses
;
1166 /* Set if the accessibility of one of the fields is not public. */
1167 int non_public_fields
= 0;
1169 /* Member function fieldlist array, contains name of possibly overloaded
1170 member function, number of overloaded member functions and a pointer
1171 to the head of the member function field chain. */
1172 std::vector
<struct fnfieldlist
> fnfieldlists
;
1174 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1175 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1176 std::vector
<struct decl_field
> typedef_field_list
;
1178 /* Nested types defined by this class and the number of elements in this
1180 std::vector
<struct decl_field
> nested_types_list
;
1182 /* If non-null, this is the variant part we are currently
1184 variant_part_builder
*current_variant_part
= nullptr;
1185 /* This holds all the top-level variant parts attached to the type
1187 std::vector
<variant_part_builder
> variant_parts
;
1189 /* Return the total number of fields (including baseclasses). */
1190 int nfields () const
1192 return fields
.size () + baseclasses
.size ();
1196 /* Loaded secondary compilation units are kept in memory until they
1197 have not been referenced for the processing of this many
1198 compilation units. Set this to zero to disable caching. Cache
1199 sizes of up to at least twenty will improve startup time for
1200 typical inter-CU-reference binaries, at an obvious memory cost. */
1201 static int dwarf_max_cache_age
= 5;
1203 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1204 struct cmd_list_element
*c
, const char *value
)
1206 fprintf_filtered (file
, _("The upper bound on the age of cached "
1207 "DWARF compilation units is %s.\n"),
1211 /* local function prototypes */
1213 static void dwarf2_find_base_address (struct die_info
*die
,
1214 struct dwarf2_cu
*cu
);
1216 static dwarf2_psymtab
*create_partial_symtab
1217 (dwarf2_per_cu_data
*per_cu
, dwarf2_per_objfile
*per_objfile
,
1220 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1221 const gdb_byte
*info_ptr
,
1222 struct die_info
*type_unit_die
);
1224 static void dwarf2_build_psymtabs_hard
1225 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1227 static void scan_partial_symbols (struct partial_die_info
*,
1228 CORE_ADDR
*, CORE_ADDR
*,
1229 int, struct dwarf2_cu
*);
1231 static void add_partial_symbol (struct partial_die_info
*,
1232 struct dwarf2_cu
*);
1234 static void add_partial_namespace (struct partial_die_info
*pdi
,
1235 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1236 int set_addrmap
, struct dwarf2_cu
*cu
);
1238 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1239 CORE_ADDR
*highpc
, int set_addrmap
,
1240 struct dwarf2_cu
*cu
);
1242 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1243 struct dwarf2_cu
*cu
);
1245 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1246 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1247 int need_pc
, struct dwarf2_cu
*cu
);
1249 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1251 static struct partial_die_info
*load_partial_dies
1252 (const struct die_reader_specs
*, const gdb_byte
*, int);
1254 /* A pair of partial_die_info and compilation unit. */
1255 struct cu_partial_die_info
1257 /* The compilation unit of the partial_die_info. */
1258 struct dwarf2_cu
*cu
;
1259 /* A partial_die_info. */
1260 struct partial_die_info
*pdi
;
1262 cu_partial_die_info (struct dwarf2_cu
*cu
, struct partial_die_info
*pdi
)
1268 cu_partial_die_info () = delete;
1271 static const struct cu_partial_die_info
find_partial_die (sect_offset
, int,
1272 struct dwarf2_cu
*);
1274 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1275 struct attribute
*, struct attr_abbrev
*,
1276 const gdb_byte
*, bool *need_reprocess
);
1278 static void read_attribute_reprocess (const struct die_reader_specs
*reader
,
1279 struct attribute
*attr
);
1281 static CORE_ADDR
read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
);
1283 static sect_offset read_abbrev_offset
1284 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1285 struct dwarf2_section_info
*, sect_offset
);
1287 static const char *read_indirect_string
1288 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1289 const struct comp_unit_head
*, unsigned int *);
1291 static const char *read_indirect_string_at_offset
1292 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, LONGEST str_offset
);
1294 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1298 static const char *read_dwo_str_index (const struct die_reader_specs
*reader
,
1299 ULONGEST str_index
);
1301 static const char *read_stub_str_index (struct dwarf2_cu
*cu
,
1302 ULONGEST str_index
);
1304 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1306 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1307 struct dwarf2_cu
*);
1309 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1310 struct dwarf2_cu
*cu
);
1312 static const char *dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
);
1314 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1315 struct dwarf2_cu
*cu
);
1317 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1319 static struct die_info
*die_specification (struct die_info
*die
,
1320 struct dwarf2_cu
**);
1322 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1323 struct dwarf2_cu
*cu
);
1325 static void dwarf_decode_lines (struct line_header
*, const char *,
1326 struct dwarf2_cu
*, dwarf2_psymtab
*,
1327 CORE_ADDR
, int decode_mapping
);
1329 static void dwarf2_start_subfile (struct dwarf2_cu
*, const char *,
1332 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1333 struct dwarf2_cu
*, struct symbol
* = NULL
);
1335 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1336 struct dwarf2_cu
*);
1338 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1341 struct obstack
*obstack
,
1342 struct dwarf2_cu
*cu
, LONGEST
*value
,
1343 const gdb_byte
**bytes
,
1344 struct dwarf2_locexpr_baton
**baton
);
1346 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1348 static int need_gnat_info (struct dwarf2_cu
*);
1350 static struct type
*die_descriptive_type (struct die_info
*,
1351 struct dwarf2_cu
*);
1353 static void set_descriptive_type (struct type
*, struct die_info
*,
1354 struct dwarf2_cu
*);
1356 static struct type
*die_containing_type (struct die_info
*,
1357 struct dwarf2_cu
*);
1359 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1360 struct dwarf2_cu
*);
1362 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1364 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1366 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1368 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1369 const char *suffix
, int physname
,
1370 struct dwarf2_cu
*cu
);
1372 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1374 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1376 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1378 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1380 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1382 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1384 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1385 struct dwarf2_cu
*, dwarf2_psymtab
*);
1387 /* Return the .debug_loclists section to use for cu. */
1388 static struct dwarf2_section_info
*cu_debug_loc_section (struct dwarf2_cu
*cu
);
1390 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1391 values. Keep the items ordered with increasing constraints compliance. */
1394 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1395 PC_BOUNDS_NOT_PRESENT
,
1397 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1398 were present but they do not form a valid range of PC addresses. */
1401 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1404 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1408 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1409 CORE_ADDR
*, CORE_ADDR
*,
1413 static void get_scope_pc_bounds (struct die_info
*,
1414 CORE_ADDR
*, CORE_ADDR
*,
1415 struct dwarf2_cu
*);
1417 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1418 CORE_ADDR
, struct dwarf2_cu
*);
1420 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1421 struct dwarf2_cu
*);
1423 static void dwarf2_attach_fields_to_type (struct field_info
*,
1424 struct type
*, struct dwarf2_cu
*);
1426 static void dwarf2_add_member_fn (struct field_info
*,
1427 struct die_info
*, struct type
*,
1428 struct dwarf2_cu
*);
1430 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1432 struct dwarf2_cu
*);
1434 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1436 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1438 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1440 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1442 static struct using_direct
**using_directives (struct dwarf2_cu
*cu
);
1444 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1446 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1448 static struct type
*read_module_type (struct die_info
*die
,
1449 struct dwarf2_cu
*cu
);
1451 static const char *namespace_name (struct die_info
*die
,
1452 int *is_anonymous
, struct dwarf2_cu
*);
1454 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1456 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*,
1459 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1460 struct dwarf2_cu
*);
1462 static struct die_info
*read_die_and_siblings_1
1463 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1466 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1467 const gdb_byte
*info_ptr
,
1468 const gdb_byte
**new_info_ptr
,
1469 struct die_info
*parent
);
1471 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1472 struct die_info
**, const gdb_byte
*,
1475 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1476 struct die_info
**, const gdb_byte
*);
1478 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1480 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1483 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1485 static const char *dwarf2_full_name (const char *name
,
1486 struct die_info
*die
,
1487 struct dwarf2_cu
*cu
);
1489 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1490 struct dwarf2_cu
*cu
);
1492 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1493 struct dwarf2_cu
**);
1495 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1497 static void dump_die_for_error (struct die_info
*);
1499 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1502 /*static*/ void dump_die (struct die_info
*, int max_level
);
1504 static void store_in_ref_table (struct die_info
*,
1505 struct dwarf2_cu
*);
1507 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1508 const struct attribute
*,
1509 struct dwarf2_cu
**);
1511 static struct die_info
*follow_die_ref (struct die_info
*,
1512 const struct attribute
*,
1513 struct dwarf2_cu
**);
1515 static struct die_info
*follow_die_sig (struct die_info
*,
1516 const struct attribute
*,
1517 struct dwarf2_cu
**);
1519 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1520 struct dwarf2_cu
*);
1522 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1523 const struct attribute
*,
1524 struct dwarf2_cu
*);
1526 static void load_full_type_unit (dwarf2_per_cu_data
*per_cu
,
1527 dwarf2_per_objfile
*per_objfile
);
1529 static void read_signatured_type (signatured_type
*sig_type
,
1530 dwarf2_per_objfile
*per_objfile
);
1532 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1533 struct die_info
*die
, struct dwarf2_cu
*cu
,
1534 struct dynamic_prop
*prop
, struct type
*type
);
1536 /* memory allocation interface */
1538 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1540 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1542 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1544 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1545 struct dwarf2_loclist_baton
*baton
,
1546 const struct attribute
*attr
);
1548 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1550 struct dwarf2_cu
*cu
,
1553 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1554 const gdb_byte
*info_ptr
,
1555 struct abbrev_info
*abbrev
);
1557 static hashval_t
partial_die_hash (const void *item
);
1559 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1561 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1562 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1563 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1565 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1566 struct die_info
*comp_unit_die
,
1567 enum language pretend_language
);
1569 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1571 static void free_one_cached_comp_unit (dwarf2_per_cu_data
*target_per_cu
,
1572 dwarf2_per_objfile
*per_objfile
);
1574 static struct type
*set_die_type (struct die_info
*, struct type
*,
1575 struct dwarf2_cu
*);
1577 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1579 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1581 static void load_full_comp_unit (dwarf2_per_cu_data
*per_cu
,
1582 dwarf2_per_objfile
*per_objfile
,
1584 enum language pretend_language
);
1586 static void process_full_comp_unit (dwarf2_per_cu_data
*per_cu
,
1587 dwarf2_per_objfile
*per_objfile
,
1588 enum language pretend_language
);
1590 static void process_full_type_unit (dwarf2_per_cu_data
*per_cu
,
1591 dwarf2_per_objfile
*per_objfile
,
1592 enum language pretend_language
);
1594 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1595 struct dwarf2_per_cu_data
*);
1597 static void dwarf2_mark (struct dwarf2_cu
*);
1599 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1601 static struct type
*get_die_type_at_offset (sect_offset
,
1602 dwarf2_per_cu_data
*per_cu
,
1603 dwarf2_per_objfile
*per_objfile
);
1605 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1607 static void queue_comp_unit (dwarf2_per_cu_data
*per_cu
,
1608 dwarf2_per_objfile
*per_objfile
,
1609 enum language pretend_language
);
1611 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1613 /* Class, the destructor of which frees all allocated queue entries. This
1614 will only have work to do if an error was thrown while processing the
1615 dwarf. If no error was thrown then the queue entries should have all
1616 been processed, and freed, as we went along. */
1618 class dwarf2_queue_guard
1621 explicit dwarf2_queue_guard (dwarf2_per_objfile
*per_objfile
)
1622 : m_per_objfile (per_objfile
)
1626 /* Free any entries remaining on the queue. There should only be
1627 entries left if we hit an error while processing the dwarf. */
1628 ~dwarf2_queue_guard ()
1630 /* Ensure that no memory is allocated by the queue. */
1631 std::queue
<dwarf2_queue_item
> empty
;
1632 std::swap (m_per_objfile
->per_bfd
->queue
, empty
);
1635 DISABLE_COPY_AND_ASSIGN (dwarf2_queue_guard
);
1638 dwarf2_per_objfile
*m_per_objfile
;
1641 dwarf2_queue_item::~dwarf2_queue_item ()
1643 /* Anything still marked queued is likely to be in an
1644 inconsistent state, so discard it. */
1647 if (per_cu
->cu
!= NULL
)
1648 free_one_cached_comp_unit (per_cu
, per_objfile
);
1653 /* The return type of find_file_and_directory. Note, the enclosed
1654 string pointers are only valid while this object is valid. */
1656 struct file_and_directory
1658 /* The filename. This is never NULL. */
1661 /* The compilation directory. NULL if not known. If we needed to
1662 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1663 points directly to the DW_AT_comp_dir string attribute owned by
1664 the obstack that owns the DIE. */
1665 const char *comp_dir
;
1667 /* If we needed to build a new string for comp_dir, this is what
1668 owns the storage. */
1669 std::string comp_dir_storage
;
1672 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1673 struct dwarf2_cu
*cu
);
1675 static htab_up
allocate_signatured_type_table ();
1677 static htab_up
allocate_dwo_unit_table ();
1679 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1680 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1681 struct dwp_file
*dwp_file
, const char *comp_dir
,
1682 ULONGEST signature
, int is_debug_types
);
1684 static struct dwp_file
*get_dwp_file
1685 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1687 static struct dwo_unit
*lookup_dwo_comp_unit
1688 (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
,
1689 ULONGEST signature
);
1691 static struct dwo_unit
*lookup_dwo_type_unit
1692 (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
);
1694 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1696 /* A unique pointer to a dwo_file. */
1698 typedef std::unique_ptr
<struct dwo_file
> dwo_file_up
;
1700 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1702 static void check_producer (struct dwarf2_cu
*cu
);
1704 static void free_line_header_voidp (void *arg
);
1706 /* Various complaints about symbol reading that don't abort the process. */
1709 dwarf2_debug_line_missing_file_complaint (void)
1711 complaint (_(".debug_line section has line data without a file"));
1715 dwarf2_debug_line_missing_end_sequence_complaint (void)
1717 complaint (_(".debug_line section has line "
1718 "program sequence without an end"));
1722 dwarf2_complex_location_expr_complaint (void)
1724 complaint (_("location expression too complex"));
1728 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1731 complaint (_("const value length mismatch for '%s', got %d, expected %d"),
1736 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1738 complaint (_("invalid attribute class or form for '%s' in '%s'"),
1742 /* Hash function for line_header_hash. */
1745 line_header_hash (const struct line_header
*ofs
)
1747 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
1750 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1753 line_header_hash_voidp (const void *item
)
1755 const struct line_header
*ofs
= (const struct line_header
*) item
;
1757 return line_header_hash (ofs
);
1760 /* Equality function for line_header_hash. */
1763 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1765 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
1766 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
1768 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
1769 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
1774 /* See declaration. */
1776 dwarf2_per_bfd::dwarf2_per_bfd (bfd
*obfd
, const dwarf2_debug_sections
*names
,
1779 can_copy (can_copy_
)
1782 names
= &dwarf2_elf_names
;
1784 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
1785 locate_sections (obfd
, sec
, *names
);
1788 dwarf2_per_bfd::~dwarf2_per_bfd ()
1790 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
1791 free_cached_comp_units ();
1793 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
1794 per_cu
->imported_symtabs_free ();
1796 for (signatured_type
*sig_type
: all_type_units
)
1797 sig_type
->per_cu
.imported_symtabs_free ();
1799 /* Everything else should be on this->obstack. */
1802 /* See declaration. */
1805 dwarf2_per_bfd::free_cached_comp_units ()
1807 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
1808 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
1809 while (per_cu
!= NULL
)
1811 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
1814 *last_chain
= next_cu
;
1819 /* A helper class that calls free_cached_comp_units on
1822 class free_cached_comp_units
1826 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
1827 : m_per_objfile (per_objfile
)
1831 ~free_cached_comp_units ()
1833 m_per_objfile
->per_bfd
->free_cached_comp_units ();
1836 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
1840 dwarf2_per_objfile
*m_per_objfile
;
1846 dwarf2_per_objfile::symtab_set_p (const dwarf2_per_cu_data
*per_cu
) const
1848 gdb_assert (per_cu
->index
< this->m_symtabs
.size ());
1850 return this->m_symtabs
[per_cu
->index
] != nullptr;
1856 dwarf2_per_objfile::get_symtab (const dwarf2_per_cu_data
*per_cu
) const
1858 gdb_assert (per_cu
->index
< this->m_symtabs
.size ());
1860 return this->m_symtabs
[per_cu
->index
];
1866 dwarf2_per_objfile::set_symtab (const dwarf2_per_cu_data
*per_cu
,
1867 compunit_symtab
*symtab
)
1869 gdb_assert (per_cu
->index
< this->m_symtabs
.size ());
1870 gdb_assert (this->m_symtabs
[per_cu
->index
] == nullptr);
1872 this->m_symtabs
[per_cu
->index
] = symtab
;
1875 /* Try to locate the sections we need for DWARF 2 debugging
1876 information and return true if we have enough to do something.
1877 NAMES points to the dwarf2 section names, or is NULL if the standard
1878 ELF names are used. CAN_COPY is true for formats where symbol
1879 interposition is possible and so symbol values must follow copy
1880 relocation rules. */
1883 dwarf2_has_info (struct objfile
*objfile
,
1884 const struct dwarf2_debug_sections
*names
,
1887 if (objfile
->flags
& OBJF_READNEVER
)
1890 struct dwarf2_per_objfile
*dwarf2_per_objfile
1891 = get_dwarf2_per_objfile (objfile
);
1893 if (dwarf2_per_objfile
== NULL
)
1895 /* For now, each dwarf2_per_objfile owns its own dwarf2_per_bfd (no
1897 dwarf2_per_bfd
*per_bfd
= new dwarf2_per_bfd (objfile
->obfd
, names
, can_copy
);
1899 dwarf2_per_objfile
= dwarf2_objfile_data_key
.emplace (objfile
, objfile
, per_bfd
);
1902 return (!dwarf2_per_objfile
->per_bfd
->info
.is_virtual
1903 && dwarf2_per_objfile
->per_bfd
->info
.s
.section
!= NULL
1904 && !dwarf2_per_objfile
->per_bfd
->abbrev
.is_virtual
1905 && dwarf2_per_objfile
->per_bfd
->abbrev
.s
.section
!= NULL
);
1908 /* When loading sections, we look either for uncompressed section or for
1909 compressed section names. */
1912 section_is_p (const char *section_name
,
1913 const struct dwarf2_section_names
*names
)
1915 if (names
->normal
!= NULL
1916 && strcmp (section_name
, names
->normal
) == 0)
1918 if (names
->compressed
!= NULL
1919 && strcmp (section_name
, names
->compressed
) == 0)
1924 /* See declaration. */
1927 dwarf2_per_bfd::locate_sections (bfd
*abfd
, asection
*sectp
,
1928 const dwarf2_debug_sections
&names
)
1930 flagword aflag
= bfd_section_flags (sectp
);
1932 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
1935 else if (elf_section_data (sectp
)->this_hdr
.sh_size
1936 > bfd_get_file_size (abfd
))
1938 bfd_size_type size
= elf_section_data (sectp
)->this_hdr
.sh_size
;
1939 warning (_("Discarding section %s which has a section size (%s"
1940 ") larger than the file size [in module %s]"),
1941 bfd_section_name (sectp
), phex_nz (size
, sizeof (size
)),
1942 bfd_get_filename (abfd
));
1944 else if (section_is_p (sectp
->name
, &names
.info
))
1946 this->info
.s
.section
= sectp
;
1947 this->info
.size
= bfd_section_size (sectp
);
1949 else if (section_is_p (sectp
->name
, &names
.abbrev
))
1951 this->abbrev
.s
.section
= sectp
;
1952 this->abbrev
.size
= bfd_section_size (sectp
);
1954 else if (section_is_p (sectp
->name
, &names
.line
))
1956 this->line
.s
.section
= sectp
;
1957 this->line
.size
= bfd_section_size (sectp
);
1959 else if (section_is_p (sectp
->name
, &names
.loc
))
1961 this->loc
.s
.section
= sectp
;
1962 this->loc
.size
= bfd_section_size (sectp
);
1964 else if (section_is_p (sectp
->name
, &names
.loclists
))
1966 this->loclists
.s
.section
= sectp
;
1967 this->loclists
.size
= bfd_section_size (sectp
);
1969 else if (section_is_p (sectp
->name
, &names
.macinfo
))
1971 this->macinfo
.s
.section
= sectp
;
1972 this->macinfo
.size
= bfd_section_size (sectp
);
1974 else if (section_is_p (sectp
->name
, &names
.macro
))
1976 this->macro
.s
.section
= sectp
;
1977 this->macro
.size
= bfd_section_size (sectp
);
1979 else if (section_is_p (sectp
->name
, &names
.str
))
1981 this->str
.s
.section
= sectp
;
1982 this->str
.size
= bfd_section_size (sectp
);
1984 else if (section_is_p (sectp
->name
, &names
.str_offsets
))
1986 this->str_offsets
.s
.section
= sectp
;
1987 this->str_offsets
.size
= bfd_section_size (sectp
);
1989 else if (section_is_p (sectp
->name
, &names
.line_str
))
1991 this->line_str
.s
.section
= sectp
;
1992 this->line_str
.size
= bfd_section_size (sectp
);
1994 else if (section_is_p (sectp
->name
, &names
.addr
))
1996 this->addr
.s
.section
= sectp
;
1997 this->addr
.size
= bfd_section_size (sectp
);
1999 else if (section_is_p (sectp
->name
, &names
.frame
))
2001 this->frame
.s
.section
= sectp
;
2002 this->frame
.size
= bfd_section_size (sectp
);
2004 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2006 this->eh_frame
.s
.section
= sectp
;
2007 this->eh_frame
.size
= bfd_section_size (sectp
);
2009 else if (section_is_p (sectp
->name
, &names
.ranges
))
2011 this->ranges
.s
.section
= sectp
;
2012 this->ranges
.size
= bfd_section_size (sectp
);
2014 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2016 this->rnglists
.s
.section
= sectp
;
2017 this->rnglists
.size
= bfd_section_size (sectp
);
2019 else if (section_is_p (sectp
->name
, &names
.types
))
2021 struct dwarf2_section_info type_section
;
2023 memset (&type_section
, 0, sizeof (type_section
));
2024 type_section
.s
.section
= sectp
;
2025 type_section
.size
= bfd_section_size (sectp
);
2027 this->types
.push_back (type_section
);
2029 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2031 this->gdb_index
.s
.section
= sectp
;
2032 this->gdb_index
.size
= bfd_section_size (sectp
);
2034 else if (section_is_p (sectp
->name
, &names
.debug_names
))
2036 this->debug_names
.s
.section
= sectp
;
2037 this->debug_names
.size
= bfd_section_size (sectp
);
2039 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
2041 this->debug_aranges
.s
.section
= sectp
;
2042 this->debug_aranges
.size
= bfd_section_size (sectp
);
2045 if ((bfd_section_flags (sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2046 && bfd_section_vma (sectp
) == 0)
2047 this->has_section_at_zero
= true;
2050 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2054 dwarf2_get_section_info (struct objfile
*objfile
,
2055 enum dwarf2_section_enum sect
,
2056 asection
**sectp
, const gdb_byte
**bufp
,
2057 bfd_size_type
*sizep
)
2059 struct dwarf2_per_objfile
*data
= dwarf2_objfile_data_key
.get (objfile
);
2060 struct dwarf2_section_info
*info
;
2062 /* We may see an objfile without any DWARF, in which case we just
2073 case DWARF2_DEBUG_FRAME
:
2074 info
= &data
->per_bfd
->frame
;
2076 case DWARF2_EH_FRAME
:
2077 info
= &data
->per_bfd
->eh_frame
;
2080 gdb_assert_not_reached ("unexpected section");
2083 info
->read (objfile
);
2085 *sectp
= info
->get_bfd_section ();
2086 *bufp
= info
->buffer
;
2087 *sizep
= info
->size
;
2090 /* A helper function to find the sections for a .dwz file. */
2093 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2095 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2097 /* Note that we only support the standard ELF names, because .dwz
2098 is ELF-only (at the time of writing). */
2099 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2101 dwz_file
->abbrev
.s
.section
= sectp
;
2102 dwz_file
->abbrev
.size
= bfd_section_size (sectp
);
2104 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2106 dwz_file
->info
.s
.section
= sectp
;
2107 dwz_file
->info
.size
= bfd_section_size (sectp
);
2109 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2111 dwz_file
->str
.s
.section
= sectp
;
2112 dwz_file
->str
.size
= bfd_section_size (sectp
);
2114 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2116 dwz_file
->line
.s
.section
= sectp
;
2117 dwz_file
->line
.size
= bfd_section_size (sectp
);
2119 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2121 dwz_file
->macro
.s
.section
= sectp
;
2122 dwz_file
->macro
.size
= bfd_section_size (sectp
);
2124 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2126 dwz_file
->gdb_index
.s
.section
= sectp
;
2127 dwz_file
->gdb_index
.size
= bfd_section_size (sectp
);
2129 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2131 dwz_file
->debug_names
.s
.section
= sectp
;
2132 dwz_file
->debug_names
.size
= bfd_section_size (sectp
);
2136 /* See dwarf2read.h. */
2139 dwarf2_get_dwz_file (dwarf2_per_bfd
*per_bfd
)
2141 const char *filename
;
2142 bfd_size_type buildid_len_arg
;
2146 if (per_bfd
->dwz_file
!= NULL
)
2147 return per_bfd
->dwz_file
.get ();
2149 bfd_set_error (bfd_error_no_error
);
2150 gdb::unique_xmalloc_ptr
<char> data
2151 (bfd_get_alt_debug_link_info (per_bfd
->obfd
,
2152 &buildid_len_arg
, &buildid
));
2155 if (bfd_get_error () == bfd_error_no_error
)
2157 error (_("could not read '.gnu_debugaltlink' section: %s"),
2158 bfd_errmsg (bfd_get_error ()));
2161 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2163 buildid_len
= (size_t) buildid_len_arg
;
2165 filename
= data
.get ();
2167 std::string abs_storage
;
2168 if (!IS_ABSOLUTE_PATH (filename
))
2170 gdb::unique_xmalloc_ptr
<char> abs
2171 = gdb_realpath (bfd_get_filename (per_bfd
->obfd
));
2173 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2174 filename
= abs_storage
.c_str ();
2177 /* First try the file name given in the section. If that doesn't
2178 work, try to use the build-id instead. */
2179 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
));
2180 if (dwz_bfd
!= NULL
)
2182 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2183 dwz_bfd
.reset (nullptr);
2186 if (dwz_bfd
== NULL
)
2187 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2189 if (dwz_bfd
== nullptr)
2191 gdb::unique_xmalloc_ptr
<char> alt_filename
;
2192 const char *origname
= bfd_get_filename (per_bfd
->obfd
);
2194 scoped_fd
fd (debuginfod_debuginfo_query (buildid
,
2201 /* File successfully retrieved from server. */
2202 dwz_bfd
= gdb_bfd_open (alt_filename
.get (), gnutarget
);
2204 if (dwz_bfd
== nullptr)
2205 warning (_("File \"%s\" from debuginfod cannot be opened as bfd"),
2206 alt_filename
.get ());
2207 else if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2208 dwz_bfd
.reset (nullptr);
2212 if (dwz_bfd
== NULL
)
2213 error (_("could not find '.gnu_debugaltlink' file for %s"),
2214 bfd_get_filename (per_bfd
->obfd
));
2216 std::unique_ptr
<struct dwz_file
> result
2217 (new struct dwz_file (std::move (dwz_bfd
)));
2219 bfd_map_over_sections (result
->dwz_bfd
.get (), locate_dwz_sections
,
2222 gdb_bfd_record_inclusion (per_bfd
->obfd
, result
->dwz_bfd
.get ());
2223 per_bfd
->dwz_file
= std::move (result
);
2224 return per_bfd
->dwz_file
.get ();
2227 /* DWARF quick_symbols_functions support. */
2229 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2230 unique line tables, so we maintain a separate table of all .debug_line
2231 derived entries to support the sharing.
2232 All the quick functions need is the list of file names. We discard the
2233 line_header when we're done and don't need to record it here. */
2234 struct quick_file_names
2236 /* The data used to construct the hash key. */
2237 struct stmt_list_hash hash
;
2239 /* The number of entries in file_names, real_names. */
2240 unsigned int num_file_names
;
2242 /* The file names from the line table, after being run through
2244 const char **file_names
;
2246 /* The file names from the line table after being run through
2247 gdb_realpath. These are computed lazily. */
2248 const char **real_names
;
2251 /* When using the index (and thus not using psymtabs), each CU has an
2252 object of this type. This is used to hold information needed by
2253 the various "quick" methods. */
2254 struct dwarf2_per_cu_quick_data
2256 /* The file table. This can be NULL if there was no file table
2257 or it's currently not read in.
2258 NOTE: This points into dwarf2_per_objfile->per_bfd->quick_file_names_table. */
2259 struct quick_file_names
*file_names
;
2261 /* A temporary mark bit used when iterating over all CUs in
2262 expand_symtabs_matching. */
2263 unsigned int mark
: 1;
2265 /* True if we've tried to read the file table and found there isn't one.
2266 There will be no point in trying to read it again next time. */
2267 unsigned int no_file_data
: 1;
2270 /* Utility hash function for a stmt_list_hash. */
2273 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2277 if (stmt_list_hash
->dwo_unit
!= NULL
)
2278 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2279 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2283 /* Utility equality function for a stmt_list_hash. */
2286 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2287 const struct stmt_list_hash
*rhs
)
2289 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2291 if (lhs
->dwo_unit
!= NULL
2292 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2295 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2298 /* Hash function for a quick_file_names. */
2301 hash_file_name_entry (const void *e
)
2303 const struct quick_file_names
*file_data
2304 = (const struct quick_file_names
*) e
;
2306 return hash_stmt_list_entry (&file_data
->hash
);
2309 /* Equality function for a quick_file_names. */
2312 eq_file_name_entry (const void *a
, const void *b
)
2314 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2315 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2317 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2320 /* Delete function for a quick_file_names. */
2323 delete_file_name_entry (void *e
)
2325 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2328 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2330 xfree ((void*) file_data
->file_names
[i
]);
2331 if (file_data
->real_names
)
2332 xfree ((void*) file_data
->real_names
[i
]);
2335 /* The space for the struct itself lives on the obstack, so we don't
2339 /* Create a quick_file_names hash table. */
2342 create_quick_file_names_table (unsigned int nr_initial_entries
)
2344 return htab_up (htab_create_alloc (nr_initial_entries
,
2345 hash_file_name_entry
, eq_file_name_entry
,
2346 delete_file_name_entry
, xcalloc
, xfree
));
2349 /* Read in CU (dwarf2_cu object) for PER_CU in the context of PER_OBJFILE. This
2350 function is unrelated to symtabs, symtab would have to be created afterwards.
2351 You should call age_cached_comp_units after processing the CU. */
2354 load_cu (dwarf2_per_cu_data
*per_cu
, dwarf2_per_objfile
*per_objfile
,
2357 if (per_cu
->is_debug_types
)
2358 load_full_type_unit (per_cu
, per_objfile
);
2360 load_full_comp_unit (per_cu
, per_objfile
, skip_partial
, language_minimal
);
2362 if (per_cu
->cu
== NULL
)
2363 return; /* Dummy CU. */
2365 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2368 /* Read in the symbols for PER_CU in the context of DWARF"_PER_OBJFILE. */
2371 dw2_do_instantiate_symtab (dwarf2_per_cu_data
*per_cu
,
2372 dwarf2_per_objfile
*dwarf2_per_objfile
,
2375 /* Skip type_unit_groups, reading the type units they contain
2376 is handled elsewhere. */
2377 if (per_cu
->type_unit_group_p ())
2380 /* The destructor of dwarf2_queue_guard frees any entries left on
2381 the queue. After this point we're guaranteed to leave this function
2382 with the dwarf queue empty. */
2383 dwarf2_queue_guard
q_guard (dwarf2_per_objfile
);
2385 if (!dwarf2_per_objfile
->symtab_set_p (per_cu
))
2387 queue_comp_unit (per_cu
, dwarf2_per_objfile
, language_minimal
);
2388 load_cu (per_cu
, dwarf2_per_objfile
, skip_partial
);
2390 /* If we just loaded a CU from a DWO, and we're working with an index
2391 that may badly handle TUs, load all the TUs in that DWO as well.
2392 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2393 if (!per_cu
->is_debug_types
2394 && per_cu
->cu
!= NULL
2395 && per_cu
->cu
->dwo_unit
!= NULL
2396 && dwarf2_per_objfile
->per_bfd
->index_table
!= NULL
2397 && dwarf2_per_objfile
->per_bfd
->index_table
->version
<= 7
2398 /* DWP files aren't supported yet. */
2399 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2400 queue_and_load_all_dwo_tus (per_cu
);
2403 process_queue (dwarf2_per_objfile
);
2405 /* Age the cache, releasing compilation units that have not
2406 been used recently. */
2407 age_cached_comp_units (dwarf2_per_objfile
);
2410 /* Ensure that the symbols for PER_CU have been read in. DWARF2_PER_OBJFILE is
2411 the per-objfile for which this symtab is instantiated.
2413 Returns the resulting symbol table. */
2415 static struct compunit_symtab
*
2416 dw2_instantiate_symtab (dwarf2_per_cu_data
*per_cu
,
2417 dwarf2_per_objfile
*dwarf2_per_objfile
,
2420 gdb_assert (dwarf2_per_objfile
->per_bfd
->using_index
);
2422 if (!dwarf2_per_objfile
->symtab_set_p (per_cu
))
2424 free_cached_comp_units
freer (dwarf2_per_objfile
);
2425 scoped_restore decrementer
= increment_reading_symtab ();
2426 dw2_do_instantiate_symtab (per_cu
, dwarf2_per_objfile
, skip_partial
);
2427 process_cu_includes (dwarf2_per_objfile
);
2430 return dwarf2_per_objfile
->get_symtab (per_cu
);
2433 /* See declaration. */
2435 dwarf2_per_cu_data
*
2436 dwarf2_per_bfd::get_cutu (int index
)
2438 if (index
>= this->all_comp_units
.size ())
2440 index
-= this->all_comp_units
.size ();
2441 gdb_assert (index
< this->all_type_units
.size ());
2442 return &this->all_type_units
[index
]->per_cu
;
2445 return this->all_comp_units
[index
];
2448 /* See declaration. */
2450 dwarf2_per_cu_data
*
2451 dwarf2_per_bfd::get_cu (int index
)
2453 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2455 return this->all_comp_units
[index
];
2458 /* See declaration. */
2461 dwarf2_per_bfd::get_tu (int index
)
2463 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2465 return this->all_type_units
[index
];
2470 dwarf2_per_cu_data
*
2471 dwarf2_per_bfd::allocate_per_cu ()
2473 dwarf2_per_cu_data
*result
= OBSTACK_ZALLOC (&obstack
, dwarf2_per_cu_data
);
2474 result
->per_bfd
= this;
2475 result
->index
= m_num_psymtabs
++;
2482 dwarf2_per_bfd::allocate_signatured_type ()
2484 signatured_type
*result
= OBSTACK_ZALLOC (&obstack
, signatured_type
);
2485 result
->per_cu
.per_bfd
= this;
2486 result
->per_cu
.index
= m_num_psymtabs
++;
2490 /* Return a new dwarf2_per_cu_data allocated on the dwarf2_per_objfile
2491 obstack, and constructed with the specified field values. */
2493 static dwarf2_per_cu_data
*
2494 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2495 struct dwarf2_section_info
*section
,
2497 sect_offset sect_off
, ULONGEST length
)
2499 dwarf2_per_cu_data
*the_cu
= dwarf2_per_objfile
->per_bfd
->allocate_per_cu ();
2500 the_cu
->sect_off
= sect_off
;
2501 the_cu
->length
= length
;
2502 the_cu
->section
= section
;
2503 the_cu
->v
.quick
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
2504 struct dwarf2_per_cu_quick_data
);
2505 the_cu
->is_dwz
= is_dwz
;
2509 /* A helper for create_cus_from_index that handles a given list of
2513 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2514 const gdb_byte
*cu_list
, offset_type n_elements
,
2515 struct dwarf2_section_info
*section
,
2518 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2520 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2522 sect_offset sect_off
2523 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2524 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2527 dwarf2_per_cu_data
*per_cu
2528 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
2530 dwarf2_per_objfile
->per_bfd
->all_comp_units
.push_back (per_cu
);
2534 /* Read the CU list from the mapped index, and use it to create all
2535 the CU objects for this objfile. */
2538 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2539 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2540 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2542 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_comp_units
.empty ());
2543 dwarf2_per_objfile
->per_bfd
->all_comp_units
.reserve
2544 ((cu_list_elements
+ dwz_elements
) / 2);
2546 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
2547 &dwarf2_per_objfile
->per_bfd
->info
, 0);
2549 if (dwz_elements
== 0)
2552 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
->per_bfd
);
2553 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
2557 /* Create the signatured type hash table from the index. */
2560 create_signatured_type_table_from_index
2561 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2562 struct dwarf2_section_info
*section
,
2563 const gdb_byte
*bytes
,
2564 offset_type elements
)
2566 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_type_units
.empty ());
2567 dwarf2_per_objfile
->per_bfd
->all_type_units
.reserve (elements
/ 3);
2569 htab_up sig_types_hash
= allocate_signatured_type_table ();
2571 for (offset_type i
= 0; i
< elements
; i
+= 3)
2573 struct signatured_type
*sig_type
;
2576 cu_offset type_offset_in_tu
;
2578 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2579 sect_offset sect_off
2580 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2582 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
2584 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2587 sig_type
= dwarf2_per_objfile
->per_bfd
->allocate_signatured_type ();
2588 sig_type
->signature
= signature
;
2589 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
2590 sig_type
->per_cu
.is_debug_types
= 1;
2591 sig_type
->per_cu
.section
= section
;
2592 sig_type
->per_cu
.sect_off
= sect_off
;
2593 sig_type
->per_cu
.v
.quick
2594 = OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
2595 struct dwarf2_per_cu_quick_data
);
2597 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2600 dwarf2_per_objfile
->per_bfd
->all_type_units
.push_back (sig_type
);
2603 dwarf2_per_objfile
->per_bfd
->signatured_types
= std::move (sig_types_hash
);
2606 /* Create the signatured type hash table from .debug_names. */
2609 create_signatured_type_table_from_debug_names
2610 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2611 const mapped_debug_names
&map
,
2612 struct dwarf2_section_info
*section
,
2613 struct dwarf2_section_info
*abbrev_section
)
2615 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2617 section
->read (objfile
);
2618 abbrev_section
->read (objfile
);
2620 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_type_units
.empty ());
2621 dwarf2_per_objfile
->per_bfd
->all_type_units
.reserve (map
.tu_count
);
2623 htab_up sig_types_hash
= allocate_signatured_type_table ();
2625 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
2627 struct signatured_type
*sig_type
;
2630 sect_offset sect_off
2631 = (sect_offset
) (extract_unsigned_integer
2632 (map
.tu_table_reordered
+ i
* map
.offset_size
,
2634 map
.dwarf5_byte_order
));
2636 comp_unit_head cu_header
;
2637 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
2639 section
->buffer
+ to_underlying (sect_off
),
2642 sig_type
= dwarf2_per_objfile
->per_bfd
->allocate_signatured_type ();
2643 sig_type
->signature
= cu_header
.signature
;
2644 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
2645 sig_type
->per_cu
.is_debug_types
= 1;
2646 sig_type
->per_cu
.section
= section
;
2647 sig_type
->per_cu
.sect_off
= sect_off
;
2648 sig_type
->per_cu
.v
.quick
2649 = OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
2650 struct dwarf2_per_cu_quick_data
);
2652 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2655 dwarf2_per_objfile
->per_bfd
->all_type_units
.push_back (sig_type
);
2658 dwarf2_per_objfile
->per_bfd
->signatured_types
= std::move (sig_types_hash
);
2661 /* Read the address map data from the mapped index, and use it to
2662 populate the objfile's psymtabs_addrmap. */
2665 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2666 struct mapped_index
*index
)
2668 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2669 struct gdbarch
*gdbarch
= objfile
->arch ();
2670 const gdb_byte
*iter
, *end
;
2671 struct addrmap
*mutable_map
;
2674 auto_obstack temp_obstack
;
2676 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2678 iter
= index
->address_table
.data ();
2679 end
= iter
+ index
->address_table
.size ();
2681 baseaddr
= objfile
->text_section_offset ();
2685 ULONGEST hi
, lo
, cu_index
;
2686 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2688 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2690 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2695 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
2696 hex_string (lo
), hex_string (hi
));
2700 if (cu_index
>= dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ())
2702 complaint (_(".gdb_index address table has invalid CU number %u"),
2703 (unsigned) cu_index
);
2707 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
) - baseaddr
;
2708 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
) - baseaddr
;
2709 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
2710 dwarf2_per_objfile
->per_bfd
->get_cu (cu_index
));
2713 objfile
->partial_symtabs
->psymtabs_addrmap
2714 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2717 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
2718 populate the objfile's psymtabs_addrmap. */
2721 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2722 struct dwarf2_section_info
*section
)
2724 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2725 bfd
*abfd
= objfile
->obfd
;
2726 struct gdbarch
*gdbarch
= objfile
->arch ();
2727 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
2729 auto_obstack temp_obstack
;
2730 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
2732 std::unordered_map
<sect_offset
,
2733 dwarf2_per_cu_data
*,
2734 gdb::hash_enum
<sect_offset
>>
2735 debug_info_offset_to_per_cu
;
2736 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
2738 const auto insertpair
2739 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
2740 if (!insertpair
.second
)
2742 warning (_("Section .debug_aranges in %s has duplicate "
2743 "debug_info_offset %s, ignoring .debug_aranges."),
2744 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
2749 section
->read (objfile
);
2751 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
2753 const gdb_byte
*addr
= section
->buffer
;
2755 while (addr
< section
->buffer
+ section
->size
)
2757 const gdb_byte
*const entry_addr
= addr
;
2758 unsigned int bytes_read
;
2760 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
2764 const gdb_byte
*const entry_end
= addr
+ entry_length
;
2765 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
2766 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
2767 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
2769 warning (_("Section .debug_aranges in %s entry at offset %s "
2770 "length %s exceeds section length %s, "
2771 "ignoring .debug_aranges."),
2772 objfile_name (objfile
),
2773 plongest (entry_addr
- section
->buffer
),
2774 plongest (bytes_read
+ entry_length
),
2775 pulongest (section
->size
));
2779 /* The version number. */
2780 const uint16_t version
= read_2_bytes (abfd
, addr
);
2784 warning (_("Section .debug_aranges in %s entry at offset %s "
2785 "has unsupported version %d, ignoring .debug_aranges."),
2786 objfile_name (objfile
),
2787 plongest (entry_addr
- section
->buffer
), version
);
2791 const uint64_t debug_info_offset
2792 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
2793 addr
+= offset_size
;
2794 const auto per_cu_it
2795 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
2796 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
2798 warning (_("Section .debug_aranges in %s entry at offset %s "
2799 "debug_info_offset %s does not exists, "
2800 "ignoring .debug_aranges."),
2801 objfile_name (objfile
),
2802 plongest (entry_addr
- section
->buffer
),
2803 pulongest (debug_info_offset
));
2806 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
2808 const uint8_t address_size
= *addr
++;
2809 if (address_size
< 1 || address_size
> 8)
2811 warning (_("Section .debug_aranges in %s entry at offset %s "
2812 "address_size %u is invalid, ignoring .debug_aranges."),
2813 objfile_name (objfile
),
2814 plongest (entry_addr
- section
->buffer
), address_size
);
2818 const uint8_t segment_selector_size
= *addr
++;
2819 if (segment_selector_size
!= 0)
2821 warning (_("Section .debug_aranges in %s entry at offset %s "
2822 "segment_selector_size %u is not supported, "
2823 "ignoring .debug_aranges."),
2824 objfile_name (objfile
),
2825 plongest (entry_addr
- section
->buffer
),
2826 segment_selector_size
);
2830 /* Must pad to an alignment boundary that is twice the address
2831 size. It is undocumented by the DWARF standard but GCC does
2833 for (size_t padding
= ((-(addr
- section
->buffer
))
2834 & (2 * address_size
- 1));
2835 padding
> 0; padding
--)
2838 warning (_("Section .debug_aranges in %s entry at offset %s "
2839 "padding is not zero, ignoring .debug_aranges."),
2840 objfile_name (objfile
),
2841 plongest (entry_addr
- section
->buffer
));
2847 if (addr
+ 2 * address_size
> entry_end
)
2849 warning (_("Section .debug_aranges in %s entry at offset %s "
2850 "address list is not properly terminated, "
2851 "ignoring .debug_aranges."),
2852 objfile_name (objfile
),
2853 plongest (entry_addr
- section
->buffer
));
2856 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
2858 addr
+= address_size
;
2859 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
2861 addr
+= address_size
;
2862 if (start
== 0 && length
== 0)
2864 if (start
== 0 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
2866 /* Symbol was eliminated due to a COMDAT group. */
2869 ULONGEST end
= start
+ length
;
2870 start
= (gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
)
2872 end
= (gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
)
2874 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
2878 objfile
->partial_symtabs
->psymtabs_addrmap
2879 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2882 /* Find a slot in the mapped index INDEX for the object named NAME.
2883 If NAME is found, set *VEC_OUT to point to the CU vector in the
2884 constant pool and return true. If NAME cannot be found, return
2888 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2889 offset_type
**vec_out
)
2892 offset_type slot
, step
;
2893 int (*cmp
) (const char *, const char *);
2895 gdb::unique_xmalloc_ptr
<char> without_params
;
2896 if (current_language
->la_language
== language_cplus
2897 || current_language
->la_language
== language_fortran
2898 || current_language
->la_language
== language_d
)
2900 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2903 if (strchr (name
, '(') != NULL
)
2905 without_params
= cp_remove_params (name
);
2907 if (without_params
!= NULL
)
2908 name
= without_params
.get ();
2912 /* Index version 4 did not support case insensitive searches. But the
2913 indices for case insensitive languages are built in lowercase, therefore
2914 simulate our NAME being searched is also lowercased. */
2915 hash
= mapped_index_string_hash ((index
->version
== 4
2916 && case_sensitivity
== case_sensitive_off
2917 ? 5 : index
->version
),
2920 slot
= hash
& (index
->symbol_table
.size () - 1);
2921 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
2922 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2928 const auto &bucket
= index
->symbol_table
[slot
];
2929 if (bucket
.name
== 0 && bucket
.vec
== 0)
2932 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
2933 if (!cmp (name
, str
))
2935 *vec_out
= (offset_type
*) (index
->constant_pool
2936 + MAYBE_SWAP (bucket
.vec
));
2940 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
2944 /* A helper function that reads the .gdb_index from BUFFER and fills
2945 in MAP. FILENAME is the name of the file containing the data;
2946 it is used for error reporting. DEPRECATED_OK is true if it is
2947 ok to use deprecated sections.
2949 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2950 out parameters that are filled in with information about the CU and
2951 TU lists in the section.
2953 Returns true if all went well, false otherwise. */
2956 read_gdb_index_from_buffer (const char *filename
,
2958 gdb::array_view
<const gdb_byte
> buffer
,
2959 struct mapped_index
*map
,
2960 const gdb_byte
**cu_list
,
2961 offset_type
*cu_list_elements
,
2962 const gdb_byte
**types_list
,
2963 offset_type
*types_list_elements
)
2965 const gdb_byte
*addr
= &buffer
[0];
2967 /* Version check. */
2968 offset_type version
= MAYBE_SWAP (*(offset_type
*) addr
);
2969 /* Versions earlier than 3 emitted every copy of a psymbol. This
2970 causes the index to behave very poorly for certain requests. Version 3
2971 contained incomplete addrmap. So, it seems better to just ignore such
2975 static int warning_printed
= 0;
2976 if (!warning_printed
)
2978 warning (_("Skipping obsolete .gdb_index section in %s."),
2980 warning_printed
= 1;
2984 /* Index version 4 uses a different hash function than index version
2987 Versions earlier than 6 did not emit psymbols for inlined
2988 functions. Using these files will cause GDB not to be able to
2989 set breakpoints on inlined functions by name, so we ignore these
2990 indices unless the user has done
2991 "set use-deprecated-index-sections on". */
2992 if (version
< 6 && !deprecated_ok
)
2994 static int warning_printed
= 0;
2995 if (!warning_printed
)
2998 Skipping deprecated .gdb_index section in %s.\n\
2999 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3000 to use the section anyway."),
3002 warning_printed
= 1;
3006 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3007 of the TU (for symbols coming from TUs),
3008 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3009 Plus gold-generated indices can have duplicate entries for global symbols,
3010 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3011 These are just performance bugs, and we can't distinguish gdb-generated
3012 indices from gold-generated ones, so issue no warning here. */
3014 /* Indexes with higher version than the one supported by GDB may be no
3015 longer backward compatible. */
3019 map
->version
= version
;
3021 offset_type
*metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3024 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3025 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3029 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3030 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3031 - MAYBE_SWAP (metadata
[i
]))
3035 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3036 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3038 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3041 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3042 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3044 = gdb::array_view
<mapped_index::symbol_table_slot
>
3045 ((mapped_index::symbol_table_slot
*) symbol_table
,
3046 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3049 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3054 /* Callback types for dwarf2_read_gdb_index. */
3056 typedef gdb::function_view
3057 <gdb::array_view
<const gdb_byte
>(objfile
*, dwarf2_per_bfd
*)>
3058 get_gdb_index_contents_ftype
;
3059 typedef gdb::function_view
3060 <gdb::array_view
<const gdb_byte
>(objfile
*, dwz_file
*)>
3061 get_gdb_index_contents_dwz_ftype
;
3063 /* Read .gdb_index. If everything went ok, initialize the "quick"
3064 elements of all the CUs and return 1. Otherwise, return 0. */
3067 dwarf2_read_gdb_index
3068 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3069 get_gdb_index_contents_ftype get_gdb_index_contents
,
3070 get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz
)
3072 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3073 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3074 struct dwz_file
*dwz
;
3075 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3077 gdb::array_view
<const gdb_byte
> main_index_contents
3078 = get_gdb_index_contents (objfile
, dwarf2_per_objfile
->per_bfd
);
3080 if (main_index_contents
.empty ())
3083 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3084 if (!read_gdb_index_from_buffer (objfile_name (objfile
),
3085 use_deprecated_index_sections
,
3086 main_index_contents
, map
.get (), &cu_list
,
3087 &cu_list_elements
, &types_list
,
3088 &types_list_elements
))
3091 /* Don't use the index if it's empty. */
3092 if (map
->symbol_table
.empty ())
3095 /* If there is a .dwz file, read it so we can get its CU list as
3097 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
->per_bfd
);
3100 struct mapped_index dwz_map
;
3101 const gdb_byte
*dwz_types_ignore
;
3102 offset_type dwz_types_elements_ignore
;
3104 gdb::array_view
<const gdb_byte
> dwz_index_content
3105 = get_gdb_index_contents_dwz (objfile
, dwz
);
3107 if (dwz_index_content
.empty ())
3110 if (!read_gdb_index_from_buffer (bfd_get_filename (dwz
->dwz_bfd
.get ()),
3111 1, dwz_index_content
, &dwz_map
,
3112 &dwz_list
, &dwz_list_elements
,
3114 &dwz_types_elements_ignore
))
3116 warning (_("could not read '.gdb_index' section from %s; skipping"),
3117 bfd_get_filename (dwz
->dwz_bfd
.get ()));
3122 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3123 dwz_list
, dwz_list_elements
);
3125 if (types_list_elements
)
3127 /* We can only handle a single .debug_types when we have an
3129 if (dwarf2_per_objfile
->per_bfd
->types
.size () != 1)
3132 dwarf2_section_info
*section
= &dwarf2_per_objfile
->per_bfd
->types
[0];
3134 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3135 types_list
, types_list_elements
);
3138 create_addrmap_from_index (dwarf2_per_objfile
, map
.get ());
3140 dwarf2_per_objfile
->per_bfd
->index_table
= std::move (map
);
3141 dwarf2_per_objfile
->per_bfd
->using_index
= 1;
3142 dwarf2_per_objfile
->per_bfd
->quick_file_names_table
=
3143 create_quick_file_names_table (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ());
3148 /* die_reader_func for dw2_get_file_names. */
3151 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3152 const gdb_byte
*info_ptr
,
3153 struct die_info
*comp_unit_die
)
3155 struct dwarf2_cu
*cu
= reader
->cu
;
3156 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3157 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
3158 struct dwarf2_per_cu_data
*lh_cu
;
3159 struct attribute
*attr
;
3161 struct quick_file_names
*qfn
;
3163 gdb_assert (! this_cu
->is_debug_types
);
3165 /* Our callers never want to match partial units -- instead they
3166 will match the enclosing full CU. */
3167 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3169 this_cu
->v
.quick
->no_file_data
= 1;
3177 sect_offset line_offset
{};
3179 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3180 if (attr
!= nullptr)
3182 struct quick_file_names find_entry
;
3184 line_offset
= (sect_offset
) DW_UNSND (attr
);
3186 /* We may have already read in this line header (TU line header sharing).
3187 If we have we're done. */
3188 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3189 find_entry
.hash
.line_sect_off
= line_offset
;
3190 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->quick_file_names_table
.get (),
3191 &find_entry
, INSERT
);
3194 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3198 lh
= dwarf_decode_line_header (line_offset
, cu
);
3202 lh_cu
->v
.quick
->no_file_data
= 1;
3206 qfn
= XOBNEW (&dwarf2_per_objfile
->per_bfd
->obstack
, struct quick_file_names
);
3207 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3208 qfn
->hash
.line_sect_off
= line_offset
;
3209 gdb_assert (slot
!= NULL
);
3212 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3215 if (strcmp (fnd
.name
, "<unknown>") != 0)
3218 qfn
->num_file_names
= offset
+ lh
->file_names_size ();
3220 XOBNEWVEC (&dwarf2_per_objfile
->per_bfd
->obstack
, const char *,
3221 qfn
->num_file_names
);
3223 qfn
->file_names
[0] = xstrdup (fnd
.name
);
3224 for (int i
= 0; i
< lh
->file_names_size (); ++i
)
3225 qfn
->file_names
[i
+ offset
] = lh
->file_full_name (i
+ 1,
3226 fnd
.comp_dir
).release ();
3227 qfn
->real_names
= NULL
;
3229 lh_cu
->v
.quick
->file_names
= qfn
;
3232 /* A helper for the "quick" functions which attempts to read the line
3233 table for THIS_CU. */
3235 static struct quick_file_names
*
3236 dw2_get_file_names (dwarf2_per_cu_data
*this_cu
,
3237 dwarf2_per_objfile
*per_objfile
)
3239 /* This should never be called for TUs. */
3240 gdb_assert (! this_cu
->is_debug_types
);
3241 /* Nor type unit groups. */
3242 gdb_assert (! this_cu
->type_unit_group_p ());
3244 if (this_cu
->v
.quick
->file_names
!= NULL
)
3245 return this_cu
->v
.quick
->file_names
;
3246 /* If we know there is no line data, no point in looking again. */
3247 if (this_cu
->v
.quick
->no_file_data
)
3250 cutu_reader
reader (this_cu
, per_objfile
);
3251 if (!reader
.dummy_p
)
3252 dw2_get_file_names_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
);
3254 if (this_cu
->v
.quick
->no_file_data
)
3256 return this_cu
->v
.quick
->file_names
;
3259 /* A helper for the "quick" functions which computes and caches the
3260 real path for a given file name from the line table. */
3263 dw2_get_real_path (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3264 struct quick_file_names
*qfn
, int index
)
3266 if (qfn
->real_names
== NULL
)
3267 qfn
->real_names
= OBSTACK_CALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
3268 qfn
->num_file_names
, const char *);
3270 if (qfn
->real_names
[index
] == NULL
)
3271 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3273 return qfn
->real_names
[index
];
3276 static struct symtab
*
3277 dw2_find_last_source_symtab (struct objfile
*objfile
)
3279 struct dwarf2_per_objfile
*dwarf2_per_objfile
3280 = get_dwarf2_per_objfile (objfile
);
3281 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->per_bfd
->all_comp_units
.back ();
3282 compunit_symtab
*cust
3283 = dw2_instantiate_symtab (dwarf_cu
, dwarf2_per_objfile
, false);
3288 return compunit_primary_filetab (cust
);
3291 /* Traversal function for dw2_forget_cached_source_info. */
3294 dw2_free_cached_file_names (void **slot
, void *info
)
3296 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3298 if (file_data
->real_names
)
3302 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3304 xfree ((void*) file_data
->real_names
[i
]);
3305 file_data
->real_names
[i
] = NULL
;
3313 dw2_forget_cached_source_info (struct objfile
*objfile
)
3315 struct dwarf2_per_objfile
*dwarf2_per_objfile
3316 = get_dwarf2_per_objfile (objfile
);
3318 htab_traverse_noresize (dwarf2_per_objfile
->per_bfd
->quick_file_names_table
.get (),
3319 dw2_free_cached_file_names
, NULL
);
3322 /* Helper function for dw2_map_symtabs_matching_filename that expands
3323 the symtabs and calls the iterator. */
3326 dw2_map_expand_apply (struct objfile
*objfile
,
3327 struct dwarf2_per_cu_data
*per_cu
,
3328 const char *name
, const char *real_path
,
3329 gdb::function_view
<bool (symtab
*)> callback
)
3331 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3333 /* Don't visit already-expanded CUs. */
3334 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3335 if (per_objfile
->symtab_set_p (per_cu
))
3338 /* This may expand more than one symtab, and we want to iterate over
3340 dw2_instantiate_symtab (per_cu
, per_objfile
, false);
3342 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3343 last_made
, callback
);
3346 /* Implementation of the map_symtabs_matching_filename method. */
3349 dw2_map_symtabs_matching_filename
3350 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3351 gdb::function_view
<bool (symtab
*)> callback
)
3353 const char *name_basename
= lbasename (name
);
3354 struct dwarf2_per_objfile
*dwarf2_per_objfile
3355 = get_dwarf2_per_objfile (objfile
);
3357 /* The rule is CUs specify all the files, including those used by
3358 any TU, so there's no need to scan TUs here. */
3360 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
3362 /* We only need to look at symtabs not already expanded. */
3363 if (dwarf2_per_objfile
->symtab_set_p (per_cu
))
3366 quick_file_names
*file_data
3367 = dw2_get_file_names (per_cu
, dwarf2_per_objfile
);
3368 if (file_data
== NULL
)
3371 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3373 const char *this_name
= file_data
->file_names
[j
];
3374 const char *this_real_name
;
3376 if (compare_filenames_for_search (this_name
, name
))
3378 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3384 /* Before we invoke realpath, which can get expensive when many
3385 files are involved, do a quick comparison of the basenames. */
3386 if (! basenames_may_differ
3387 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3390 this_real_name
= dw2_get_real_path (dwarf2_per_objfile
,
3392 if (compare_filenames_for_search (this_real_name
, name
))
3394 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3400 if (real_path
!= NULL
)
3402 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3403 gdb_assert (IS_ABSOLUTE_PATH (name
));
3404 if (this_real_name
!= NULL
3405 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3407 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3419 /* Struct used to manage iterating over all CUs looking for a symbol. */
3421 struct dw2_symtab_iterator
3423 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3424 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3425 /* If set, only look for symbols that match that block. Valid values are
3426 GLOBAL_BLOCK and STATIC_BLOCK. */
3427 gdb::optional
<block_enum
> block_index
;
3428 /* The kind of symbol we're looking for. */
3430 /* The list of CUs from the index entry of the symbol,
3431 or NULL if not found. */
3433 /* The next element in VEC to look at. */
3435 /* The number of elements in VEC, or zero if there is no match. */
3437 /* Have we seen a global version of the symbol?
3438 If so we can ignore all further global instances.
3439 This is to work around gold/15646, inefficient gold-generated
3444 /* Initialize the index symtab iterator ITER. */
3447 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3448 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3449 gdb::optional
<block_enum
> block_index
,
3453 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3454 iter
->block_index
= block_index
;
3455 iter
->domain
= domain
;
3457 iter
->global_seen
= 0;
3459 mapped_index
*index
= dwarf2_per_objfile
->per_bfd
->index_table
.get ();
3461 /* index is NULL if OBJF_READNOW. */
3462 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3463 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3471 /* Return the next matching CU or NULL if there are no more. */
3473 static struct dwarf2_per_cu_data
*
3474 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3476 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3478 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3480 offset_type cu_index_and_attrs
=
3481 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3482 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3483 gdb_index_symbol_kind symbol_kind
=
3484 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3485 /* Only check the symbol attributes if they're present.
3486 Indices prior to version 7 don't record them,
3487 and indices >= 7 may elide them for certain symbols
3488 (gold does this). */
3490 (dwarf2_per_objfile
->per_bfd
->index_table
->version
>= 7
3491 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3493 /* Don't crash on bad data. */
3494 if (cu_index
>= (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ()
3495 + dwarf2_per_objfile
->per_bfd
->all_type_units
.size ()))
3497 complaint (_(".gdb_index entry has bad CU index"
3499 objfile_name (dwarf2_per_objfile
->objfile
));
3503 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->per_bfd
->get_cutu (cu_index
);
3505 /* Skip if already read in. */
3506 if (dwarf2_per_objfile
->symtab_set_p (per_cu
))
3509 /* Check static vs global. */
3512 bool is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3514 if (iter
->block_index
.has_value ())
3516 bool want_static
= *iter
->block_index
== STATIC_BLOCK
;
3518 if (is_static
!= want_static
)
3522 /* Work around gold/15646. */
3523 if (!is_static
&& iter
->global_seen
)
3526 iter
->global_seen
= 1;
3529 /* Only check the symbol's kind if it has one. */
3532 switch (iter
->domain
)
3535 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3536 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3537 /* Some types are also in VAR_DOMAIN. */
3538 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3542 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3546 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3550 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3565 static struct compunit_symtab
*
3566 dw2_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
3567 const char *name
, domain_enum domain
)
3569 struct compunit_symtab
*stab_best
= NULL
;
3570 struct dwarf2_per_objfile
*dwarf2_per_objfile
3571 = get_dwarf2_per_objfile (objfile
);
3573 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
3575 struct dw2_symtab_iterator iter
;
3576 struct dwarf2_per_cu_data
*per_cu
;
3578 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, block_index
, domain
, name
);
3580 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3582 struct symbol
*sym
, *with_opaque
= NULL
;
3583 struct compunit_symtab
*stab
3584 = dw2_instantiate_symtab (per_cu
, dwarf2_per_objfile
, false);
3585 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3586 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3588 sym
= block_find_symbol (block
, name
, domain
,
3589 block_find_non_opaque_type_preferred
,
3592 /* Some caution must be observed with overloaded functions
3593 and methods, since the index will not contain any overload
3594 information (but NAME might contain it). */
3597 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
3599 if (with_opaque
!= NULL
3600 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
3603 /* Keep looking through other CUs. */
3610 dw2_print_stats (struct objfile
*objfile
)
3612 struct dwarf2_per_objfile
*dwarf2_per_objfile
3613 = get_dwarf2_per_objfile (objfile
);
3614 int total
= (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ()
3615 + dwarf2_per_objfile
->per_bfd
->all_type_units
.size ());
3618 for (int i
= 0; i
< total
; ++i
)
3620 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->per_bfd
->get_cutu (i
);
3622 if (!dwarf2_per_objfile
->symtab_set_p (per_cu
))
3625 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3626 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3629 /* This dumps minimal information about the index.
3630 It is called via "mt print objfiles".
3631 One use is to verify .gdb_index has been loaded by the
3632 gdb.dwarf2/gdb-index.exp testcase. */
3635 dw2_dump (struct objfile
*objfile
)
3637 struct dwarf2_per_objfile
*dwarf2_per_objfile
3638 = get_dwarf2_per_objfile (objfile
);
3640 gdb_assert (dwarf2_per_objfile
->per_bfd
->using_index
);
3641 printf_filtered (".gdb_index:");
3642 if (dwarf2_per_objfile
->per_bfd
->index_table
!= NULL
)
3644 printf_filtered (" version %d\n",
3645 dwarf2_per_objfile
->per_bfd
->index_table
->version
);
3648 printf_filtered (" faked for \"readnow\"\n");
3649 printf_filtered ("\n");
3653 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3654 const char *func_name
)
3656 struct dwarf2_per_objfile
*dwarf2_per_objfile
3657 = get_dwarf2_per_objfile (objfile
);
3659 struct dw2_symtab_iterator iter
;
3660 struct dwarf2_per_cu_data
*per_cu
;
3662 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, {}, VAR_DOMAIN
, func_name
);
3664 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3665 dw2_instantiate_symtab (per_cu
, dwarf2_per_objfile
, false);
3670 dw2_expand_all_symtabs (struct objfile
*objfile
)
3672 struct dwarf2_per_objfile
*dwarf2_per_objfile
3673 = get_dwarf2_per_objfile (objfile
);
3674 int total_units
= (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ()
3675 + dwarf2_per_objfile
->per_bfd
->all_type_units
.size ());
3677 for (int i
= 0; i
< total_units
; ++i
)
3679 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->per_bfd
->get_cutu (i
);
3681 /* We don't want to directly expand a partial CU, because if we
3682 read it with the wrong language, then assertion failures can
3683 be triggered later on. See PR symtab/23010. So, tell
3684 dw2_instantiate_symtab to skip partial CUs -- any important
3685 partial CU will be read via DW_TAG_imported_unit anyway. */
3686 dw2_instantiate_symtab (per_cu
, dwarf2_per_objfile
, true);
3691 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3692 const char *fullname
)
3694 struct dwarf2_per_objfile
*dwarf2_per_objfile
3695 = get_dwarf2_per_objfile (objfile
);
3697 /* We don't need to consider type units here.
3698 This is only called for examining code, e.g. expand_line_sal.
3699 There can be an order of magnitude (or more) more type units
3700 than comp units, and we avoid them if we can. */
3702 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
3704 /* We only need to look at symtabs not already expanded. */
3705 if (dwarf2_per_objfile
->symtab_set_p (per_cu
))
3708 quick_file_names
*file_data
3709 = dw2_get_file_names (per_cu
, dwarf2_per_objfile
);
3710 if (file_data
== NULL
)
3713 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3715 const char *this_fullname
= file_data
->file_names
[j
];
3717 if (filename_cmp (this_fullname
, fullname
) == 0)
3719 dw2_instantiate_symtab (per_cu
, dwarf2_per_objfile
, false);
3727 dw2_expand_symtabs_matching_symbol
3728 (mapped_index_base
&index
,
3729 const lookup_name_info
&lookup_name_in
,
3730 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3731 enum search_domain kind
,
3732 gdb::function_view
<bool (offset_type
)> match_callback
);
3735 dw2_expand_symtabs_matching_one
3736 (dwarf2_per_cu_data
*per_cu
,
3737 dwarf2_per_objfile
*per_objfile
,
3738 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3739 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
);
3742 dw2_map_matching_symbols
3743 (struct objfile
*objfile
,
3744 const lookup_name_info
&name
, domain_enum domain
,
3746 gdb::function_view
<symbol_found_callback_ftype
> callback
,
3747 symbol_compare_ftype
*ordered_compare
)
3750 struct dwarf2_per_objfile
*dwarf2_per_objfile
3751 = get_dwarf2_per_objfile (objfile
);
3753 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
3755 if (dwarf2_per_objfile
->per_bfd
->index_table
!= nullptr)
3757 /* Ada currently doesn't support .gdb_index (see PR24713). We can get
3758 here though if the current language is Ada for a non-Ada objfile
3760 mapped_index
&index
= *dwarf2_per_objfile
->per_bfd
->index_table
;
3762 const char *match_name
= name
.ada ().lookup_name ().c_str ();
3763 auto matcher
= [&] (const char *symname
)
3765 if (ordered_compare
== nullptr)
3767 return ordered_compare (symname
, match_name
) == 0;
3770 dw2_expand_symtabs_matching_symbol (index
, name
, matcher
, ALL_DOMAIN
,
3771 [&] (offset_type namei
)
3773 struct dw2_symtab_iterator iter
;
3774 struct dwarf2_per_cu_data
*per_cu
;
3776 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, block_kind
, domain
,
3778 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3779 dw2_expand_symtabs_matching_one (per_cu
, dwarf2_per_objfile
, nullptr,
3786 /* We have -readnow: no .gdb_index, but no partial symtabs either. So,
3787 proceed assuming all symtabs have been read in. */
3790 for (compunit_symtab
*cust
: objfile
->compunits ())
3792 const struct block
*block
;
3796 block
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
3797 if (!iterate_over_symbols_terminated (block
, name
,
3803 /* Starting from a search name, return the string that finds the upper
3804 bound of all strings that start with SEARCH_NAME in a sorted name
3805 list. Returns the empty string to indicate that the upper bound is
3806 the end of the list. */
3809 make_sort_after_prefix_name (const char *search_name
)
3811 /* When looking to complete "func", we find the upper bound of all
3812 symbols that start with "func" by looking for where we'd insert
3813 the closest string that would follow "func" in lexicographical
3814 order. Usually, that's "func"-with-last-character-incremented,
3815 i.e. "fund". Mind non-ASCII characters, though. Usually those
3816 will be UTF-8 multi-byte sequences, but we can't be certain.
3817 Especially mind the 0xff character, which is a valid character in
3818 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
3819 rule out compilers allowing it in identifiers. Note that
3820 conveniently, strcmp/strcasecmp are specified to compare
3821 characters interpreted as unsigned char. So what we do is treat
3822 the whole string as a base 256 number composed of a sequence of
3823 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
3824 to 0, and carries 1 to the following more-significant position.
3825 If the very first character in SEARCH_NAME ends up incremented
3826 and carries/overflows, then the upper bound is the end of the
3827 list. The string after the empty string is also the empty
3830 Some examples of this operation:
3832 SEARCH_NAME => "+1" RESULT
3836 "\xff" "a" "\xff" => "\xff" "b"
3841 Then, with these symbols for example:
3847 completing "func" looks for symbols between "func" and
3848 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
3849 which finds "func" and "func1", but not "fund".
3853 funcÿ (Latin1 'ÿ' [0xff])
3857 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
3858 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
3862 ÿÿ (Latin1 'ÿ' [0xff])
3865 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
3866 the end of the list.
3868 std::string after
= search_name
;
3869 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
3871 if (!after
.empty ())
3872 after
.back () = (unsigned char) after
.back () + 1;
3876 /* See declaration. */
3878 std::pair
<std::vector
<name_component
>::const_iterator
,
3879 std::vector
<name_component
>::const_iterator
>
3880 mapped_index_base::find_name_components_bounds
3881 (const lookup_name_info
&lookup_name_without_params
, language lang
) const
3884 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3886 const char *lang_name
3887 = lookup_name_without_params
.language_lookup_name (lang
);
3889 /* Comparison function object for lower_bound that matches against a
3890 given symbol name. */
3891 auto lookup_compare_lower
= [&] (const name_component
&elem
,
3894 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
3895 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
3896 return name_cmp (elem_name
, name
) < 0;
3899 /* Comparison function object for upper_bound that matches against a
3900 given symbol name. */
3901 auto lookup_compare_upper
= [&] (const char *name
,
3902 const name_component
&elem
)
3904 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
3905 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
3906 return name_cmp (name
, elem_name
) < 0;
3909 auto begin
= this->name_components
.begin ();
3910 auto end
= this->name_components
.end ();
3912 /* Find the lower bound. */
3915 if (lookup_name_without_params
.completion_mode () && lang_name
[0] == '\0')
3918 return std::lower_bound (begin
, end
, lang_name
, lookup_compare_lower
);
3921 /* Find the upper bound. */
3924 if (lookup_name_without_params
.completion_mode ())
3926 /* In completion mode, we want UPPER to point past all
3927 symbols names that have the same prefix. I.e., with
3928 these symbols, and completing "func":
3930 function << lower bound
3932 other_function << upper bound
3934 We find the upper bound by looking for the insertion
3935 point of "func"-with-last-character-incremented,
3937 std::string after
= make_sort_after_prefix_name (lang_name
);
3940 return std::lower_bound (lower
, end
, after
.c_str (),
3941 lookup_compare_lower
);
3944 return std::upper_bound (lower
, end
, lang_name
, lookup_compare_upper
);
3947 return {lower
, upper
};
3950 /* See declaration. */
3953 mapped_index_base::build_name_components ()
3955 if (!this->name_components
.empty ())
3958 this->name_components_casing
= case_sensitivity
;
3960 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3962 /* The code below only knows how to break apart components of C++
3963 symbol names (and other languages that use '::' as
3964 namespace/module separator) and Ada symbol names. */
3965 auto count
= this->symbol_name_count ();
3966 for (offset_type idx
= 0; idx
< count
; idx
++)
3968 if (this->symbol_name_slot_invalid (idx
))
3971 const char *name
= this->symbol_name_at (idx
);
3973 /* Add each name component to the name component table. */
3974 unsigned int previous_len
= 0;
3976 if (strstr (name
, "::") != nullptr)
3978 for (unsigned int current_len
= cp_find_first_component (name
);
3979 name
[current_len
] != '\0';
3980 current_len
+= cp_find_first_component (name
+ current_len
))
3982 gdb_assert (name
[current_len
] == ':');
3983 this->name_components
.push_back ({previous_len
, idx
});
3984 /* Skip the '::'. */
3986 previous_len
= current_len
;
3991 /* Handle the Ada encoded (aka mangled) form here. */
3992 for (const char *iter
= strstr (name
, "__");
3994 iter
= strstr (iter
, "__"))
3996 this->name_components
.push_back ({previous_len
, idx
});
3998 previous_len
= iter
- name
;
4002 this->name_components
.push_back ({previous_len
, idx
});
4005 /* Sort name_components elements by name. */
4006 auto name_comp_compare
= [&] (const name_component
&left
,
4007 const name_component
&right
)
4009 const char *left_qualified
= this->symbol_name_at (left
.idx
);
4010 const char *right_qualified
= this->symbol_name_at (right
.idx
);
4012 const char *left_name
= left_qualified
+ left
.name_offset
;
4013 const char *right_name
= right_qualified
+ right
.name_offset
;
4015 return name_cmp (left_name
, right_name
) < 0;
4018 std::sort (this->name_components
.begin (),
4019 this->name_components
.end (),
4023 /* Helper for dw2_expand_symtabs_matching that works with a
4024 mapped_index_base instead of the containing objfile. This is split
4025 to a separate function in order to be able to unit test the
4026 name_components matching using a mock mapped_index_base. For each
4027 symbol name that matches, calls MATCH_CALLBACK, passing it the
4028 symbol's index in the mapped_index_base symbol table. */
4031 dw2_expand_symtabs_matching_symbol
4032 (mapped_index_base
&index
,
4033 const lookup_name_info
&lookup_name_in
,
4034 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4035 enum search_domain kind
,
4036 gdb::function_view
<bool (offset_type
)> match_callback
)
4038 lookup_name_info lookup_name_without_params
4039 = lookup_name_in
.make_ignore_params ();
4041 /* Build the symbol name component sorted vector, if we haven't
4043 index
.build_name_components ();
4045 /* The same symbol may appear more than once in the range though.
4046 E.g., if we're looking for symbols that complete "w", and we have
4047 a symbol named "w1::w2", we'll find the two name components for
4048 that same symbol in the range. To be sure we only call the
4049 callback once per symbol, we first collect the symbol name
4050 indexes that matched in a temporary vector and ignore
4052 std::vector
<offset_type
> matches
;
4054 struct name_and_matcher
4056 symbol_name_matcher_ftype
*matcher
;
4059 bool operator== (const name_and_matcher
&other
) const
4061 return matcher
== other
.matcher
&& strcmp (name
, other
.name
) == 0;
4065 /* A vector holding all the different symbol name matchers, for all
4067 std::vector
<name_and_matcher
> matchers
;
4069 for (int i
= 0; i
< nr_languages
; i
++)
4071 enum language lang_e
= (enum language
) i
;
4073 const language_defn
*lang
= language_def (lang_e
);
4074 symbol_name_matcher_ftype
*name_matcher
4075 = get_symbol_name_matcher (lang
, lookup_name_without_params
);
4077 name_and_matcher key
{
4079 lookup_name_without_params
.language_lookup_name (lang_e
)
4082 /* Don't insert the same comparison routine more than once.
4083 Note that we do this linear walk. This is not a problem in
4084 practice because the number of supported languages is
4086 if (std::find (matchers
.begin (), matchers
.end (), key
)
4089 matchers
.push_back (std::move (key
));
4092 = index
.find_name_components_bounds (lookup_name_without_params
,
4095 /* Now for each symbol name in range, check to see if we have a name
4096 match, and if so, call the MATCH_CALLBACK callback. */
4098 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4100 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4102 if (!name_matcher (qualified
, lookup_name_without_params
, NULL
)
4103 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4106 matches
.push_back (bounds
.first
->idx
);
4110 std::sort (matches
.begin (), matches
.end ());
4112 /* Finally call the callback, once per match. */
4114 for (offset_type idx
: matches
)
4118 if (!match_callback (idx
))
4124 /* Above we use a type wider than idx's for 'prev', since 0 and
4125 (offset_type)-1 are both possible values. */
4126 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4131 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4133 /* A mock .gdb_index/.debug_names-like name index table, enough to
4134 exercise dw2_expand_symtabs_matching_symbol, which works with the
4135 mapped_index_base interface. Builds an index from the symbol list
4136 passed as parameter to the constructor. */
4137 class mock_mapped_index
: public mapped_index_base
4140 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4141 : m_symbol_table (symbols
)
4144 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4146 /* Return the number of names in the symbol table. */
4147 size_t symbol_name_count () const override
4149 return m_symbol_table
.size ();
4152 /* Get the name of the symbol at IDX in the symbol table. */
4153 const char *symbol_name_at (offset_type idx
) const override
4155 return m_symbol_table
[idx
];
4159 gdb::array_view
<const char *> m_symbol_table
;
4162 /* Convenience function that converts a NULL pointer to a "<null>"
4163 string, to pass to print routines. */
4166 string_or_null (const char *str
)
4168 return str
!= NULL
? str
: "<null>";
4171 /* Check if a lookup_name_info built from
4172 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4173 index. EXPECTED_LIST is the list of expected matches, in expected
4174 matching order. If no match expected, then an empty list is
4175 specified. Returns true on success. On failure prints a warning
4176 indicating the file:line that failed, and returns false. */
4179 check_match (const char *file
, int line
,
4180 mock_mapped_index
&mock_index
,
4181 const char *name
, symbol_name_match_type match_type
,
4182 bool completion_mode
,
4183 std::initializer_list
<const char *> expected_list
)
4185 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4187 bool matched
= true;
4189 auto mismatch
= [&] (const char *expected_str
,
4192 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4193 "expected=\"%s\", got=\"%s\"\n"),
4195 (match_type
== symbol_name_match_type::FULL
4197 name
, string_or_null (expected_str
), string_or_null (got
));
4201 auto expected_it
= expected_list
.begin ();
4202 auto expected_end
= expected_list
.end ();
4204 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4206 [&] (offset_type idx
)
4208 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4209 const char *expected_str
4210 = expected_it
== expected_end
? NULL
: *expected_it
++;
4212 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4213 mismatch (expected_str
, matched_name
);
4217 const char *expected_str
4218 = expected_it
== expected_end
? NULL
: *expected_it
++;
4219 if (expected_str
!= NULL
)
4220 mismatch (expected_str
, NULL
);
4225 /* The symbols added to the mock mapped_index for testing (in
4227 static const char *test_symbols
[] = {
4236 "ns2::tmpl<int>::foo2",
4237 "(anonymous namespace)::A::B::C",
4239 /* These are used to check that the increment-last-char in the
4240 matching algorithm for completion doesn't match "t1_fund" when
4241 completing "t1_func". */
4247 /* A UTF-8 name with multi-byte sequences to make sure that
4248 cp-name-parser understands this as a single identifier ("função"
4249 is "function" in PT). */
4252 /* \377 (0xff) is Latin1 'ÿ'. */
4255 /* \377 (0xff) is Latin1 'ÿ'. */
4259 /* A name with all sorts of complications. Starts with "z" to make
4260 it easier for the completion tests below. */
4261 #define Z_SYM_NAME \
4262 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4263 "::tuple<(anonymous namespace)::ui*, " \
4264 "std::default_delete<(anonymous namespace)::ui>, void>"
4269 /* Returns true if the mapped_index_base::find_name_component_bounds
4270 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4271 in completion mode. */
4274 check_find_bounds_finds (mapped_index_base
&index
,
4275 const char *search_name
,
4276 gdb::array_view
<const char *> expected_syms
)
4278 lookup_name_info
lookup_name (search_name
,
4279 symbol_name_match_type::FULL
, true);
4281 auto bounds
= index
.find_name_components_bounds (lookup_name
,
4284 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4285 if (distance
!= expected_syms
.size ())
4288 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4290 auto nc_elem
= bounds
.first
+ exp_elem
;
4291 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4292 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4299 /* Test the lower-level mapped_index::find_name_component_bounds
4303 test_mapped_index_find_name_component_bounds ()
4305 mock_mapped_index
mock_index (test_symbols
);
4307 mock_index
.build_name_components ();
4309 /* Test the lower-level mapped_index::find_name_component_bounds
4310 method in completion mode. */
4312 static const char *expected_syms
[] = {
4317 SELF_CHECK (check_find_bounds_finds (mock_index
,
4318 "t1_func", expected_syms
));
4321 /* Check that the increment-last-char in the name matching algorithm
4322 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4324 static const char *expected_syms1
[] = {
4328 SELF_CHECK (check_find_bounds_finds (mock_index
,
4329 "\377", expected_syms1
));
4331 static const char *expected_syms2
[] = {
4334 SELF_CHECK (check_find_bounds_finds (mock_index
,
4335 "\377\377", expected_syms2
));
4339 /* Test dw2_expand_symtabs_matching_symbol. */
4342 test_dw2_expand_symtabs_matching_symbol ()
4344 mock_mapped_index
mock_index (test_symbols
);
4346 /* We let all tests run until the end even if some fails, for debug
4348 bool any_mismatch
= false;
4350 /* Create the expected symbols list (an initializer_list). Needed
4351 because lists have commas, and we need to pass them to CHECK,
4352 which is a macro. */
4353 #define EXPECT(...) { __VA_ARGS__ }
4355 /* Wrapper for check_match that passes down the current
4356 __FILE__/__LINE__. */
4357 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4358 any_mismatch |= !check_match (__FILE__, __LINE__, \
4360 NAME, MATCH_TYPE, COMPLETION_MODE, \
4363 /* Identity checks. */
4364 for (const char *sym
: test_symbols
)
4366 /* Should be able to match all existing symbols. */
4367 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4370 /* Should be able to match all existing symbols with
4372 std::string with_params
= std::string (sym
) + "(int)";
4373 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4376 /* Should be able to match all existing symbols with
4377 parameters and qualifiers. */
4378 with_params
= std::string (sym
) + " ( int ) const";
4379 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4382 /* This should really find sym, but cp-name-parser.y doesn't
4383 know about lvalue/rvalue qualifiers yet. */
4384 with_params
= std::string (sym
) + " ( int ) &&";
4385 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4389 /* Check that the name matching algorithm for completion doesn't get
4390 confused with Latin1 'ÿ' / 0xff. */
4392 static const char str
[] = "\377";
4393 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4394 EXPECT ("\377", "\377\377123"));
4397 /* Check that the increment-last-char in the matching algorithm for
4398 completion doesn't match "t1_fund" when completing "t1_func". */
4400 static const char str
[] = "t1_func";
4401 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4402 EXPECT ("t1_func", "t1_func1"));
4405 /* Check that completion mode works at each prefix of the expected
4408 static const char str
[] = "function(int)";
4409 size_t len
= strlen (str
);
4412 for (size_t i
= 1; i
< len
; i
++)
4414 lookup
.assign (str
, i
);
4415 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4416 EXPECT ("function"));
4420 /* While "w" is a prefix of both components, the match function
4421 should still only be called once. */
4423 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4425 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4429 /* Same, with a "complicated" symbol. */
4431 static const char str
[] = Z_SYM_NAME
;
4432 size_t len
= strlen (str
);
4435 for (size_t i
= 1; i
< len
; i
++)
4437 lookup
.assign (str
, i
);
4438 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4439 EXPECT (Z_SYM_NAME
));
4443 /* In FULL mode, an incomplete symbol doesn't match. */
4445 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4449 /* A complete symbol with parameters matches any overload, since the
4450 index has no overload info. */
4452 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4453 EXPECT ("std::zfunction", "std::zfunction2"));
4454 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4455 EXPECT ("std::zfunction", "std::zfunction2"));
4456 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4457 EXPECT ("std::zfunction", "std::zfunction2"));
4460 /* Check that whitespace is ignored appropriately. A symbol with a
4461 template argument list. */
4463 static const char expected
[] = "ns::foo<int>";
4464 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4466 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4470 /* Check that whitespace is ignored appropriately. A symbol with a
4471 template argument list that includes a pointer. */
4473 static const char expected
[] = "ns::foo<char*>";
4474 /* Try both completion and non-completion modes. */
4475 static const bool completion_mode
[2] = {false, true};
4476 for (size_t i
= 0; i
< 2; i
++)
4478 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4479 completion_mode
[i
], EXPECT (expected
));
4480 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4481 completion_mode
[i
], EXPECT (expected
));
4483 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4484 completion_mode
[i
], EXPECT (expected
));
4485 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4486 completion_mode
[i
], EXPECT (expected
));
4491 /* Check method qualifiers are ignored. */
4492 static const char expected
[] = "ns::foo<char*>";
4493 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4494 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4495 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4496 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4497 CHECK_MATCH ("foo < char * > ( int ) const",
4498 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4499 CHECK_MATCH ("foo < char * > ( int ) &&",
4500 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4503 /* Test lookup names that don't match anything. */
4505 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4508 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4512 /* Some wild matching tests, exercising "(anonymous namespace)",
4513 which should not be confused with a parameter list. */
4515 static const char *syms
[] = {
4519 "A :: B :: C ( int )",
4524 for (const char *s
: syms
)
4526 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4527 EXPECT ("(anonymous namespace)::A::B::C"));
4532 static const char expected
[] = "ns2::tmpl<int>::foo2";
4533 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4535 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4539 SELF_CHECK (!any_mismatch
);
4548 test_mapped_index_find_name_component_bounds ();
4549 test_dw2_expand_symtabs_matching_symbol ();
4552 }} // namespace selftests::dw2_expand_symtabs_matching
4554 #endif /* GDB_SELF_TEST */
4556 /* If FILE_MATCHER is NULL or if PER_CU has
4557 dwarf2_per_cu_quick_data::MARK set (see
4558 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4559 EXPANSION_NOTIFY on it. */
4562 dw2_expand_symtabs_matching_one
4563 (dwarf2_per_cu_data
*per_cu
,
4564 dwarf2_per_objfile
*per_objfile
,
4565 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4566 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4568 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4570 bool symtab_was_null
= !per_objfile
->symtab_set_p (per_cu
);
4572 compunit_symtab
*symtab
4573 = dw2_instantiate_symtab (per_cu
, per_objfile
, false);
4574 gdb_assert (symtab
!= nullptr);
4576 if (expansion_notify
!= NULL
&& symtab_was_null
)
4577 expansion_notify (symtab
);
4581 /* Helper for dw2_expand_matching symtabs. Called on each symbol
4582 matched, to expand corresponding CUs that were marked. IDX is the
4583 index of the symbol name that matched. */
4586 dw2_expand_marked_cus
4587 (dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
4588 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4589 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4592 offset_type
*vec
, vec_len
, vec_idx
;
4593 bool global_seen
= false;
4594 mapped_index
&index
= *dwarf2_per_objfile
->per_bfd
->index_table
;
4596 vec
= (offset_type
*) (index
.constant_pool
4597 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
4598 vec_len
= MAYBE_SWAP (vec
[0]);
4599 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
4601 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4602 /* This value is only valid for index versions >= 7. */
4603 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4604 gdb_index_symbol_kind symbol_kind
=
4605 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4606 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4607 /* Only check the symbol attributes if they're present.
4608 Indices prior to version 7 don't record them,
4609 and indices >= 7 may elide them for certain symbols
4610 (gold does this). */
4613 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4615 /* Work around gold/15646. */
4618 if (!is_static
&& global_seen
)
4624 /* Only check the symbol's kind if it has one. */
4629 case VARIABLES_DOMAIN
:
4630 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4633 case FUNCTIONS_DOMAIN
:
4634 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4638 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4641 case MODULES_DOMAIN
:
4642 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4650 /* Don't crash on bad data. */
4651 if (cu_index
>= (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ()
4652 + dwarf2_per_objfile
->per_bfd
->all_type_units
.size ()))
4654 complaint (_(".gdb_index entry has bad CU index"
4656 objfile_name (dwarf2_per_objfile
->objfile
));
4660 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->per_bfd
->get_cutu (cu_index
);
4661 dw2_expand_symtabs_matching_one (per_cu
, dwarf2_per_objfile
, file_matcher
,
4666 /* If FILE_MATCHER is non-NULL, set all the
4667 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
4668 that match FILE_MATCHER. */
4671 dw_expand_symtabs_matching_file_matcher
4672 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
4673 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
4675 if (file_matcher
== NULL
)
4678 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
4680 NULL
, xcalloc
, xfree
));
4681 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
4683 NULL
, xcalloc
, xfree
));
4685 /* The rule is CUs specify all the files, including those used by
4686 any TU, so there's no need to scan TUs here. */
4688 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
4692 per_cu
->v
.quick
->mark
= 0;
4694 /* We only need to look at symtabs not already expanded. */
4695 if (dwarf2_per_objfile
->symtab_set_p (per_cu
))
4698 quick_file_names
*file_data
4699 = dw2_get_file_names (per_cu
, dwarf2_per_objfile
);
4700 if (file_data
== NULL
)
4703 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
4705 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
4707 per_cu
->v
.quick
->mark
= 1;
4711 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4713 const char *this_real_name
;
4715 if (file_matcher (file_data
->file_names
[j
], false))
4717 per_cu
->v
.quick
->mark
= 1;
4721 /* Before we invoke realpath, which can get expensive when many
4722 files are involved, do a quick comparison of the basenames. */
4723 if (!basenames_may_differ
4724 && !file_matcher (lbasename (file_data
->file_names
[j
]),
4728 this_real_name
= dw2_get_real_path (dwarf2_per_objfile
,
4730 if (file_matcher (this_real_name
, false))
4732 per_cu
->v
.quick
->mark
= 1;
4737 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
4738 ? visited_found
.get ()
4739 : visited_not_found
.get (),
4746 dw2_expand_symtabs_matching
4747 (struct objfile
*objfile
,
4748 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4749 const lookup_name_info
*lookup_name
,
4750 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4751 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4752 enum search_domain kind
)
4754 struct dwarf2_per_objfile
*dwarf2_per_objfile
4755 = get_dwarf2_per_objfile (objfile
);
4757 /* index_table is NULL if OBJF_READNOW. */
4758 if (!dwarf2_per_objfile
->per_bfd
->index_table
)
4761 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
4763 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
4765 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
4769 dw2_expand_symtabs_matching_one (per_cu
, dwarf2_per_objfile
,
4770 file_matcher
, expansion_notify
);
4775 mapped_index
&index
= *dwarf2_per_objfile
->per_bfd
->index_table
;
4777 dw2_expand_symtabs_matching_symbol (index
, *lookup_name
,
4779 kind
, [&] (offset_type idx
)
4781 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
4782 expansion_notify
, kind
);
4787 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4790 static struct compunit_symtab
*
4791 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4796 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4797 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4800 if (cust
->includes
== NULL
)
4803 for (i
= 0; cust
->includes
[i
]; ++i
)
4805 struct compunit_symtab
*s
= cust
->includes
[i
];
4807 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4815 static struct compunit_symtab
*
4816 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4817 struct bound_minimal_symbol msymbol
,
4819 struct obj_section
*section
,
4822 struct dwarf2_per_cu_data
*data
;
4823 struct compunit_symtab
*result
;
4825 if (!objfile
->partial_symtabs
->psymtabs_addrmap
)
4828 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
4829 data
= (struct dwarf2_per_cu_data
*) addrmap_find
4830 (objfile
->partial_symtabs
->psymtabs_addrmap
, pc
- baseaddr
);
4834 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
4835 if (warn_if_readin
&& per_objfile
->symtab_set_p (data
))
4836 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4837 paddress (objfile
->arch (), pc
));
4839 result
= recursively_find_pc_sect_compunit_symtab
4840 (dw2_instantiate_symtab (data
, per_objfile
, false), pc
);
4842 gdb_assert (result
!= NULL
);
4847 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4848 void *data
, int need_fullname
)
4850 struct dwarf2_per_objfile
*dwarf2_per_objfile
4851 = get_dwarf2_per_objfile (objfile
);
4853 if (!dwarf2_per_objfile
->per_bfd
->filenames_cache
)
4855 dwarf2_per_objfile
->per_bfd
->filenames_cache
.emplace ();
4857 htab_up
visited (htab_create_alloc (10,
4858 htab_hash_pointer
, htab_eq_pointer
,
4859 NULL
, xcalloc
, xfree
));
4861 /* The rule is CUs specify all the files, including those used
4862 by any TU, so there's no need to scan TUs here. We can
4863 ignore file names coming from already-expanded CUs. */
4865 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
4867 if (dwarf2_per_objfile
->symtab_set_p (per_cu
))
4869 void **slot
= htab_find_slot (visited
.get (),
4870 per_cu
->v
.quick
->file_names
,
4873 *slot
= per_cu
->v
.quick
->file_names
;
4877 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
4879 /* We only need to look at symtabs not already expanded. */
4880 if (dwarf2_per_objfile
->symtab_set_p (per_cu
))
4883 quick_file_names
*file_data
4884 = dw2_get_file_names (per_cu
, dwarf2_per_objfile
);
4885 if (file_data
== NULL
)
4888 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
4891 /* Already visited. */
4896 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4898 const char *filename
= file_data
->file_names
[j
];
4899 dwarf2_per_objfile
->per_bfd
->filenames_cache
->seen (filename
);
4904 dwarf2_per_objfile
->per_bfd
->filenames_cache
->traverse ([&] (const char *filename
)
4906 gdb::unique_xmalloc_ptr
<char> this_real_name
;
4909 this_real_name
= gdb_realpath (filename
);
4910 (*fun
) (filename
, this_real_name
.get (), data
);
4915 dw2_has_symbols (struct objfile
*objfile
)
4920 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4923 dw2_find_last_source_symtab
,
4924 dw2_forget_cached_source_info
,
4925 dw2_map_symtabs_matching_filename
,
4930 dw2_expand_symtabs_for_function
,
4931 dw2_expand_all_symtabs
,
4932 dw2_expand_symtabs_with_fullname
,
4933 dw2_map_matching_symbols
,
4934 dw2_expand_symtabs_matching
,
4935 dw2_find_pc_sect_compunit_symtab
,
4937 dw2_map_symbol_filenames
4940 /* DWARF-5 debug_names reader. */
4942 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
4943 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
4945 /* A helper function that reads the .debug_names section in SECTION
4946 and fills in MAP. FILENAME is the name of the file containing the
4947 section; it is used for error reporting.
4949 Returns true if all went well, false otherwise. */
4952 read_debug_names_from_section (struct objfile
*objfile
,
4953 const char *filename
,
4954 struct dwarf2_section_info
*section
,
4955 mapped_debug_names
&map
)
4957 if (section
->empty ())
4960 /* Older elfutils strip versions could keep the section in the main
4961 executable while splitting it for the separate debug info file. */
4962 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
4965 section
->read (objfile
);
4967 map
.dwarf5_byte_order
= gdbarch_byte_order (objfile
->arch ());
4969 const gdb_byte
*addr
= section
->buffer
;
4971 bfd
*const abfd
= section
->get_bfd_owner ();
4973 unsigned int bytes_read
;
4974 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
4977 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
4978 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
4979 if (bytes_read
+ length
!= section
->size
)
4981 /* There may be multiple per-CU indices. */
4982 warning (_("Section .debug_names in %s length %s does not match "
4983 "section length %s, ignoring .debug_names."),
4984 filename
, plongest (bytes_read
+ length
),
4985 pulongest (section
->size
));
4989 /* The version number. */
4990 uint16_t version
= read_2_bytes (abfd
, addr
);
4994 warning (_("Section .debug_names in %s has unsupported version %d, "
4995 "ignoring .debug_names."),
5001 uint16_t padding
= read_2_bytes (abfd
, addr
);
5005 warning (_("Section .debug_names in %s has unsupported padding %d, "
5006 "ignoring .debug_names."),
5011 /* comp_unit_count - The number of CUs in the CU list. */
5012 map
.cu_count
= read_4_bytes (abfd
, addr
);
5015 /* local_type_unit_count - The number of TUs in the local TU
5017 map
.tu_count
= read_4_bytes (abfd
, addr
);
5020 /* foreign_type_unit_count - The number of TUs in the foreign TU
5022 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
5024 if (foreign_tu_count
!= 0)
5026 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
5027 "ignoring .debug_names."),
5028 filename
, static_cast<unsigned long> (foreign_tu_count
));
5032 /* bucket_count - The number of hash buckets in the hash lookup
5034 map
.bucket_count
= read_4_bytes (abfd
, addr
);
5037 /* name_count - The number of unique names in the index. */
5038 map
.name_count
= read_4_bytes (abfd
, addr
);
5041 /* abbrev_table_size - The size in bytes of the abbreviations
5043 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
5046 /* augmentation_string_size - The size in bytes of the augmentation
5047 string. This value is rounded up to a multiple of 4. */
5048 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
5050 map
.augmentation_is_gdb
= ((augmentation_string_size
5051 == sizeof (dwarf5_augmentation
))
5052 && memcmp (addr
, dwarf5_augmentation
,
5053 sizeof (dwarf5_augmentation
)) == 0);
5054 augmentation_string_size
+= (-augmentation_string_size
) & 3;
5055 addr
+= augmentation_string_size
;
5058 map
.cu_table_reordered
= addr
;
5059 addr
+= map
.cu_count
* map
.offset_size
;
5061 /* List of Local TUs */
5062 map
.tu_table_reordered
= addr
;
5063 addr
+= map
.tu_count
* map
.offset_size
;
5065 /* Hash Lookup Table */
5066 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5067 addr
+= map
.bucket_count
* 4;
5068 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5069 addr
+= map
.name_count
* 4;
5072 map
.name_table_string_offs_reordered
= addr
;
5073 addr
+= map
.name_count
* map
.offset_size
;
5074 map
.name_table_entry_offs_reordered
= addr
;
5075 addr
+= map
.name_count
* map
.offset_size
;
5077 const gdb_byte
*abbrev_table_start
= addr
;
5080 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5085 const auto insertpair
5086 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5087 if (!insertpair
.second
)
5089 warning (_("Section .debug_names in %s has duplicate index %s, "
5090 "ignoring .debug_names."),
5091 filename
, pulongest (index_num
));
5094 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5095 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5100 mapped_debug_names::index_val::attr attr
;
5101 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5103 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5105 if (attr
.form
== DW_FORM_implicit_const
)
5107 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5111 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5113 indexval
.attr_vec
.push_back (std::move (attr
));
5116 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5118 warning (_("Section .debug_names in %s has abbreviation_table "
5119 "of size %s vs. written as %u, ignoring .debug_names."),
5120 filename
, plongest (addr
- abbrev_table_start
),
5124 map
.entry_pool
= addr
;
5129 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5133 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5134 const mapped_debug_names
&map
,
5135 dwarf2_section_info
§ion
,
5138 if (!map
.augmentation_is_gdb
)
5140 for (uint32_t i
= 0; i
< map
.cu_count
; ++i
)
5142 sect_offset sect_off
5143 = (sect_offset
) (extract_unsigned_integer
5144 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5146 map
.dwarf5_byte_order
));
5147 /* We don't know the length of the CU, because the CU list in a
5148 .debug_names index can be incomplete, so we can't use the start of
5149 the next CU as end of this CU. We create the CUs here with length 0,
5150 and in cutu_reader::cutu_reader we'll fill in the actual length. */
5151 dwarf2_per_cu_data
*per_cu
5152 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5154 dwarf2_per_objfile
->per_bfd
->all_comp_units
.push_back (per_cu
);
5158 sect_offset sect_off_prev
;
5159 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5161 sect_offset sect_off_next
;
5162 if (i
< map
.cu_count
)
5165 = (sect_offset
) (extract_unsigned_integer
5166 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5168 map
.dwarf5_byte_order
));
5171 sect_off_next
= (sect_offset
) section
.size
;
5174 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5175 dwarf2_per_cu_data
*per_cu
5176 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5177 sect_off_prev
, length
);
5178 dwarf2_per_objfile
->per_bfd
->all_comp_units
.push_back (per_cu
);
5180 sect_off_prev
= sect_off_next
;
5184 /* Read the CU list from the mapped index, and use it to create all
5185 the CU objects for this dwarf2_per_objfile. */
5188 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5189 const mapped_debug_names
&map
,
5190 const mapped_debug_names
&dwz_map
)
5192 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_comp_units
.empty ());
5193 dwarf2_per_objfile
->per_bfd
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5195 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5196 dwarf2_per_objfile
->per_bfd
->info
,
5197 false /* is_dwz */);
5199 if (dwz_map
.cu_count
== 0)
5202 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
->per_bfd
);
5203 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5207 /* Read .debug_names. If everything went ok, initialize the "quick"
5208 elements of all the CUs and return true. Otherwise, return false. */
5211 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5213 std::unique_ptr
<mapped_debug_names
> map
5214 (new mapped_debug_names (dwarf2_per_objfile
));
5215 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5216 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5218 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5219 &dwarf2_per_objfile
->per_bfd
->debug_names
,
5223 /* Don't use the index if it's empty. */
5224 if (map
->name_count
== 0)
5227 /* If there is a .dwz file, read it so we can get its CU list as
5229 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
->per_bfd
);
5232 if (!read_debug_names_from_section (objfile
,
5233 bfd_get_filename (dwz
->dwz_bfd
.get ()),
5234 &dwz
->debug_names
, dwz_map
))
5236 warning (_("could not read '.debug_names' section from %s; skipping"),
5237 bfd_get_filename (dwz
->dwz_bfd
.get ()));
5242 create_cus_from_debug_names (dwarf2_per_objfile
, *map
, dwz_map
);
5244 if (map
->tu_count
!= 0)
5246 /* We can only handle a single .debug_types when we have an
5248 if (dwarf2_per_objfile
->per_bfd
->types
.size () != 1)
5251 dwarf2_section_info
*section
= &dwarf2_per_objfile
->per_bfd
->types
[0];
5253 create_signatured_type_table_from_debug_names
5254 (dwarf2_per_objfile
, *map
, section
, &dwarf2_per_objfile
->per_bfd
->abbrev
);
5257 create_addrmap_from_aranges (dwarf2_per_objfile
,
5258 &dwarf2_per_objfile
->per_bfd
->debug_aranges
);
5260 dwarf2_per_objfile
->per_bfd
->debug_names_table
= std::move (map
);
5261 dwarf2_per_objfile
->per_bfd
->using_index
= 1;
5262 dwarf2_per_objfile
->per_bfd
->quick_file_names_table
=
5263 create_quick_file_names_table (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ());
5268 /* Type used to manage iterating over all CUs looking for a symbol for
5271 class dw2_debug_names_iterator
5274 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5275 gdb::optional
<block_enum
> block_index
,
5278 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5279 m_addr (find_vec_in_debug_names (map
, name
))
5282 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5283 search_domain search
, uint32_t namei
)
5286 m_addr (find_vec_in_debug_names (map
, namei
))
5289 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5290 block_enum block_index
, domain_enum domain
,
5292 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5293 m_addr (find_vec_in_debug_names (map
, namei
))
5296 /* Return the next matching CU or NULL if there are no more. */
5297 dwarf2_per_cu_data
*next ();
5300 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5302 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5305 /* The internalized form of .debug_names. */
5306 const mapped_debug_names
&m_map
;
5308 /* If set, only look for symbols that match that block. Valid values are
5309 GLOBAL_BLOCK and STATIC_BLOCK. */
5310 const gdb::optional
<block_enum
> m_block_index
;
5312 /* The kind of symbol we're looking for. */
5313 const domain_enum m_domain
= UNDEF_DOMAIN
;
5314 const search_domain m_search
= ALL_DOMAIN
;
5316 /* The list of CUs from the index entry of the symbol, or NULL if
5318 const gdb_byte
*m_addr
;
5322 mapped_debug_names::namei_to_name (uint32_t namei
) const
5324 const ULONGEST namei_string_offs
5325 = extract_unsigned_integer ((name_table_string_offs_reordered
5326 + namei
* offset_size
),
5329 return read_indirect_string_at_offset (dwarf2_per_objfile
,
5333 /* Find a slot in .debug_names for the object named NAME. If NAME is
5334 found, return pointer to its pool data. If NAME cannot be found,
5338 dw2_debug_names_iterator::find_vec_in_debug_names
5339 (const mapped_debug_names
&map
, const char *name
)
5341 int (*cmp
) (const char *, const char *);
5343 gdb::unique_xmalloc_ptr
<char> without_params
;
5344 if (current_language
->la_language
== language_cplus
5345 || current_language
->la_language
== language_fortran
5346 || current_language
->la_language
== language_d
)
5348 /* NAME is already canonical. Drop any qualifiers as
5349 .debug_names does not contain any. */
5351 if (strchr (name
, '(') != NULL
)
5353 without_params
= cp_remove_params (name
);
5354 if (without_params
!= NULL
)
5355 name
= without_params
.get ();
5359 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5361 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5363 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5364 (map
.bucket_table_reordered
5365 + (full_hash
% map
.bucket_count
)), 4,
5366 map
.dwarf5_byte_order
);
5370 if (namei
>= map
.name_count
)
5372 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5374 namei
, map
.name_count
,
5375 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5381 const uint32_t namei_full_hash
5382 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5383 (map
.hash_table_reordered
+ namei
), 4,
5384 map
.dwarf5_byte_order
);
5385 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5388 if (full_hash
== namei_full_hash
)
5390 const char *const namei_string
= map
.namei_to_name (namei
);
5392 #if 0 /* An expensive sanity check. */
5393 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5395 complaint (_("Wrong .debug_names hash for string at index %u "
5397 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5402 if (cmp (namei_string
, name
) == 0)
5404 const ULONGEST namei_entry_offs
5405 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5406 + namei
* map
.offset_size
),
5407 map
.offset_size
, map
.dwarf5_byte_order
);
5408 return map
.entry_pool
+ namei_entry_offs
;
5413 if (namei
>= map
.name_count
)
5419 dw2_debug_names_iterator::find_vec_in_debug_names
5420 (const mapped_debug_names
&map
, uint32_t namei
)
5422 if (namei
>= map
.name_count
)
5424 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5426 namei
, map
.name_count
,
5427 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5431 const ULONGEST namei_entry_offs
5432 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5433 + namei
* map
.offset_size
),
5434 map
.offset_size
, map
.dwarf5_byte_order
);
5435 return map
.entry_pool
+ namei_entry_offs
;
5438 /* See dw2_debug_names_iterator. */
5440 dwarf2_per_cu_data
*
5441 dw2_debug_names_iterator::next ()
5446 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5447 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5448 bfd
*const abfd
= objfile
->obfd
;
5452 unsigned int bytes_read
;
5453 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5454 m_addr
+= bytes_read
;
5458 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5459 if (indexval_it
== m_map
.abbrev_map
.cend ())
5461 complaint (_("Wrong .debug_names undefined abbrev code %s "
5463 pulongest (abbrev
), objfile_name (objfile
));
5466 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5467 enum class symbol_linkage
{
5471 } symbol_linkage_
= symbol_linkage::unknown
;
5472 dwarf2_per_cu_data
*per_cu
= NULL
;
5473 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5478 case DW_FORM_implicit_const
:
5479 ull
= attr
.implicit_const
;
5481 case DW_FORM_flag_present
:
5485 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5486 m_addr
+= bytes_read
;
5489 ull
= read_4_bytes (abfd
, m_addr
);
5493 ull
= read_8_bytes (abfd
, m_addr
);
5496 case DW_FORM_ref_sig8
:
5497 ull
= read_8_bytes (abfd
, m_addr
);
5501 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5502 dwarf_form_name (attr
.form
),
5503 objfile_name (objfile
));
5506 switch (attr
.dw_idx
)
5508 case DW_IDX_compile_unit
:
5509 /* Don't crash on bad data. */
5510 if (ull
>= dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ())
5512 complaint (_(".debug_names entry has bad CU index %s"
5515 objfile_name (dwarf2_per_objfile
->objfile
));
5518 per_cu
= dwarf2_per_objfile
->per_bfd
->get_cutu (ull
);
5520 case DW_IDX_type_unit
:
5521 /* Don't crash on bad data. */
5522 if (ull
>= dwarf2_per_objfile
->per_bfd
->all_type_units
.size ())
5524 complaint (_(".debug_names entry has bad TU index %s"
5527 objfile_name (dwarf2_per_objfile
->objfile
));
5530 per_cu
= &dwarf2_per_objfile
->per_bfd
->get_tu (ull
)->per_cu
;
5532 case DW_IDX_die_offset
:
5533 /* In a per-CU index (as opposed to a per-module index), index
5534 entries without CU attribute implicitly refer to the single CU. */
5536 per_cu
= dwarf2_per_objfile
->per_bfd
->get_cu (0);
5538 case DW_IDX_GNU_internal
:
5539 if (!m_map
.augmentation_is_gdb
)
5541 symbol_linkage_
= symbol_linkage::static_
;
5543 case DW_IDX_GNU_external
:
5544 if (!m_map
.augmentation_is_gdb
)
5546 symbol_linkage_
= symbol_linkage::extern_
;
5551 /* Skip if already read in. */
5552 if (dwarf2_per_objfile
->symtab_set_p (per_cu
))
5555 /* Check static vs global. */
5556 if (symbol_linkage_
!= symbol_linkage::unknown
&& m_block_index
.has_value ())
5558 const bool want_static
= *m_block_index
== STATIC_BLOCK
;
5559 const bool symbol_is_static
=
5560 symbol_linkage_
== symbol_linkage::static_
;
5561 if (want_static
!= symbol_is_static
)
5565 /* Match dw2_symtab_iter_next, symbol_kind
5566 and debug_names::psymbol_tag. */
5570 switch (indexval
.dwarf_tag
)
5572 case DW_TAG_variable
:
5573 case DW_TAG_subprogram
:
5574 /* Some types are also in VAR_DOMAIN. */
5575 case DW_TAG_typedef
:
5576 case DW_TAG_structure_type
:
5583 switch (indexval
.dwarf_tag
)
5585 case DW_TAG_typedef
:
5586 case DW_TAG_structure_type
:
5593 switch (indexval
.dwarf_tag
)
5596 case DW_TAG_variable
:
5603 switch (indexval
.dwarf_tag
)
5615 /* Match dw2_expand_symtabs_matching, symbol_kind and
5616 debug_names::psymbol_tag. */
5619 case VARIABLES_DOMAIN
:
5620 switch (indexval
.dwarf_tag
)
5622 case DW_TAG_variable
:
5628 case FUNCTIONS_DOMAIN
:
5629 switch (indexval
.dwarf_tag
)
5631 case DW_TAG_subprogram
:
5638 switch (indexval
.dwarf_tag
)
5640 case DW_TAG_typedef
:
5641 case DW_TAG_structure_type
:
5647 case MODULES_DOMAIN
:
5648 switch (indexval
.dwarf_tag
)
5662 static struct compunit_symtab
*
5663 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
5664 const char *name
, domain_enum domain
)
5666 struct dwarf2_per_objfile
*dwarf2_per_objfile
5667 = get_dwarf2_per_objfile (objfile
);
5669 const auto &mapp
= dwarf2_per_objfile
->per_bfd
->debug_names_table
;
5672 /* index is NULL if OBJF_READNOW. */
5675 const auto &map
= *mapp
;
5677 dw2_debug_names_iterator
iter (map
, block_index
, domain
, name
);
5679 struct compunit_symtab
*stab_best
= NULL
;
5680 struct dwarf2_per_cu_data
*per_cu
;
5681 while ((per_cu
= iter
.next ()) != NULL
)
5683 struct symbol
*sym
, *with_opaque
= NULL
;
5684 compunit_symtab
*stab
5685 = dw2_instantiate_symtab (per_cu
, dwarf2_per_objfile
, false);
5686 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
5687 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
5689 sym
= block_find_symbol (block
, name
, domain
,
5690 block_find_non_opaque_type_preferred
,
5693 /* Some caution must be observed with overloaded functions and
5694 methods, since the index will not contain any overload
5695 information (but NAME might contain it). */
5698 && strcmp_iw (sym
->search_name (), name
) == 0)
5700 if (with_opaque
!= NULL
5701 && strcmp_iw (with_opaque
->search_name (), name
) == 0)
5704 /* Keep looking through other CUs. */
5710 /* This dumps minimal information about .debug_names. It is called
5711 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
5712 uses this to verify that .debug_names has been loaded. */
5715 dw2_debug_names_dump (struct objfile
*objfile
)
5717 struct dwarf2_per_objfile
*dwarf2_per_objfile
5718 = get_dwarf2_per_objfile (objfile
);
5720 gdb_assert (dwarf2_per_objfile
->per_bfd
->using_index
);
5721 printf_filtered (".debug_names:");
5722 if (dwarf2_per_objfile
->per_bfd
->debug_names_table
)
5723 printf_filtered (" exists\n");
5725 printf_filtered (" faked for \"readnow\"\n");
5726 printf_filtered ("\n");
5730 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
5731 const char *func_name
)
5733 struct dwarf2_per_objfile
*dwarf2_per_objfile
5734 = get_dwarf2_per_objfile (objfile
);
5736 /* dwarf2_per_objfile->per_bfd->debug_names_table is NULL if OBJF_READNOW. */
5737 if (dwarf2_per_objfile
->per_bfd
->debug_names_table
)
5739 const mapped_debug_names
&map
= *dwarf2_per_objfile
->per_bfd
->debug_names_table
;
5741 dw2_debug_names_iterator
iter (map
, {}, VAR_DOMAIN
, func_name
);
5743 struct dwarf2_per_cu_data
*per_cu
;
5744 while ((per_cu
= iter
.next ()) != NULL
)
5745 dw2_instantiate_symtab (per_cu
, dwarf2_per_objfile
, false);
5750 dw2_debug_names_map_matching_symbols
5751 (struct objfile
*objfile
,
5752 const lookup_name_info
&name
, domain_enum domain
,
5754 gdb::function_view
<symbol_found_callback_ftype
> callback
,
5755 symbol_compare_ftype
*ordered_compare
)
5757 struct dwarf2_per_objfile
*dwarf2_per_objfile
5758 = get_dwarf2_per_objfile (objfile
);
5760 /* debug_names_table is NULL if OBJF_READNOW. */
5761 if (!dwarf2_per_objfile
->per_bfd
->debug_names_table
)
5764 mapped_debug_names
&map
= *dwarf2_per_objfile
->per_bfd
->debug_names_table
;
5765 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
5767 const char *match_name
= name
.ada ().lookup_name ().c_str ();
5768 auto matcher
= [&] (const char *symname
)
5770 if (ordered_compare
== nullptr)
5772 return ordered_compare (symname
, match_name
) == 0;
5775 dw2_expand_symtabs_matching_symbol (map
, name
, matcher
, ALL_DOMAIN
,
5776 [&] (offset_type namei
)
5778 /* The name was matched, now expand corresponding CUs that were
5780 dw2_debug_names_iterator
iter (map
, block_kind
, domain
, namei
);
5782 struct dwarf2_per_cu_data
*per_cu
;
5783 while ((per_cu
= iter
.next ()) != NULL
)
5784 dw2_expand_symtabs_matching_one (per_cu
, dwarf2_per_objfile
, nullptr,
5789 /* It's a shame we couldn't do this inside the
5790 dw2_expand_symtabs_matching_symbol callback, but that skips CUs
5791 that have already been expanded. Instead, this loop matches what
5792 the psymtab code does. */
5793 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
5795 compunit_symtab
*symtab
= dwarf2_per_objfile
->get_symtab (per_cu
);
5796 if (symtab
!= nullptr)
5798 const struct block
*block
5799 = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (symtab
), block_kind
);
5800 if (!iterate_over_symbols_terminated (block
, name
,
5808 dw2_debug_names_expand_symtabs_matching
5809 (struct objfile
*objfile
,
5810 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5811 const lookup_name_info
*lookup_name
,
5812 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5813 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5814 enum search_domain kind
)
5816 struct dwarf2_per_objfile
*dwarf2_per_objfile
5817 = get_dwarf2_per_objfile (objfile
);
5819 /* debug_names_table is NULL if OBJF_READNOW. */
5820 if (!dwarf2_per_objfile
->per_bfd
->debug_names_table
)
5823 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5825 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
5827 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
5831 dw2_expand_symtabs_matching_one (per_cu
, dwarf2_per_objfile
,
5832 file_matcher
, expansion_notify
);
5837 mapped_debug_names
&map
= *dwarf2_per_objfile
->per_bfd
->debug_names_table
;
5839 dw2_expand_symtabs_matching_symbol (map
, *lookup_name
,
5841 kind
, [&] (offset_type namei
)
5843 /* The name was matched, now expand corresponding CUs that were
5845 dw2_debug_names_iterator
iter (map
, kind
, namei
);
5847 struct dwarf2_per_cu_data
*per_cu
;
5848 while ((per_cu
= iter
.next ()) != NULL
)
5849 dw2_expand_symtabs_matching_one (per_cu
, dwarf2_per_objfile
,
5850 file_matcher
, expansion_notify
);
5855 const struct quick_symbol_functions dwarf2_debug_names_functions
=
5858 dw2_find_last_source_symtab
,
5859 dw2_forget_cached_source_info
,
5860 dw2_map_symtabs_matching_filename
,
5861 dw2_debug_names_lookup_symbol
,
5864 dw2_debug_names_dump
,
5865 dw2_debug_names_expand_symtabs_for_function
,
5866 dw2_expand_all_symtabs
,
5867 dw2_expand_symtabs_with_fullname
,
5868 dw2_debug_names_map_matching_symbols
,
5869 dw2_debug_names_expand_symtabs_matching
,
5870 dw2_find_pc_sect_compunit_symtab
,
5872 dw2_map_symbol_filenames
5875 /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
5876 to either a dwarf2_per_bfd or dwz_file object. */
5878 template <typename T
>
5879 static gdb::array_view
<const gdb_byte
>
5880 get_gdb_index_contents_from_section (objfile
*obj
, T
*section_owner
)
5882 dwarf2_section_info
*section
= §ion_owner
->gdb_index
;
5884 if (section
->empty ())
5887 /* Older elfutils strip versions could keep the section in the main
5888 executable while splitting it for the separate debug info file. */
5889 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
5892 section
->read (obj
);
5894 /* dwarf2_section_info::size is a bfd_size_type, while
5895 gdb::array_view works with size_t. On 32-bit hosts, with
5896 --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t
5897 is 32-bit. So we need an explicit narrowing conversion here.
5898 This is fine, because it's impossible to allocate or mmap an
5899 array/buffer larger than what size_t can represent. */
5900 return gdb::make_array_view (section
->buffer
, section
->size
);
5903 /* Lookup the index cache for the contents of the index associated to
5906 static gdb::array_view
<const gdb_byte
>
5907 get_gdb_index_contents_from_cache (objfile
*obj
, dwarf2_per_bfd
*dwarf2_per_bfd
)
5909 const bfd_build_id
*build_id
= build_id_bfd_get (obj
->obfd
);
5910 if (build_id
== nullptr)
5913 return global_index_cache
.lookup_gdb_index (build_id
,
5914 &dwarf2_per_bfd
->index_cache_res
);
5917 /* Same as the above, but for DWZ. */
5919 static gdb::array_view
<const gdb_byte
>
5920 get_gdb_index_contents_from_cache_dwz (objfile
*obj
, dwz_file
*dwz
)
5922 const bfd_build_id
*build_id
= build_id_bfd_get (dwz
->dwz_bfd
.get ());
5923 if (build_id
== nullptr)
5926 return global_index_cache
.lookup_gdb_index (build_id
, &dwz
->index_cache_res
);
5929 /* See symfile.h. */
5932 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
5934 struct dwarf2_per_objfile
*dwarf2_per_objfile
5935 = get_dwarf2_per_objfile (objfile
);
5937 /* If we're about to read full symbols, don't bother with the
5938 indices. In this case we also don't care if some other debug
5939 format is making psymtabs, because they are all about to be
5941 if ((objfile
->flags
& OBJF_READNOW
))
5943 dwarf2_per_objfile
->per_bfd
->using_index
= 1;
5944 create_all_comp_units (dwarf2_per_objfile
);
5945 create_all_type_units (dwarf2_per_objfile
);
5946 dwarf2_per_objfile
->per_bfd
->quick_file_names_table
5947 = create_quick_file_names_table
5948 (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ());
5949 dwarf2_per_objfile
->resize_symtabs ();
5951 for (int i
= 0; i
< (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ()
5952 + dwarf2_per_objfile
->per_bfd
->all_type_units
.size ()); ++i
)
5954 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->per_bfd
->get_cutu (i
);
5956 per_cu
->v
.quick
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
5957 struct dwarf2_per_cu_quick_data
);
5960 /* Return 1 so that gdb sees the "quick" functions. However,
5961 these functions will be no-ops because we will have expanded
5963 *index_kind
= dw_index_kind::GDB_INDEX
;
5967 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
5969 *index_kind
= dw_index_kind::DEBUG_NAMES
;
5970 dwarf2_per_objfile
->resize_symtabs ();
5974 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
5975 get_gdb_index_contents_from_section
<struct dwarf2_per_bfd
>,
5976 get_gdb_index_contents_from_section
<dwz_file
>))
5978 *index_kind
= dw_index_kind::GDB_INDEX
;
5979 dwarf2_per_objfile
->resize_symtabs ();
5983 /* ... otherwise, try to find the index in the index cache. */
5984 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
5985 get_gdb_index_contents_from_cache
,
5986 get_gdb_index_contents_from_cache_dwz
))
5988 global_index_cache
.hit ();
5989 *index_kind
= dw_index_kind::GDB_INDEX
;
5990 dwarf2_per_objfile
->resize_symtabs ();
5994 global_index_cache
.miss ();
6000 /* Build a partial symbol table. */
6003 dwarf2_build_psymtabs (struct objfile
*objfile
)
6005 struct dwarf2_per_objfile
*dwarf2_per_objfile
6006 = get_dwarf2_per_objfile (objfile
);
6008 init_psymbol_list (objfile
, 1024);
6012 /* This isn't really ideal: all the data we allocate on the
6013 objfile's obstack is still uselessly kept around. However,
6014 freeing it seems unsafe. */
6015 psymtab_discarder
psymtabs (objfile
);
6016 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
6019 dwarf2_per_objfile
->resize_symtabs ();
6021 /* (maybe) store an index in the cache. */
6022 global_index_cache
.store (dwarf2_per_objfile
);
6024 catch (const gdb_exception_error
&except
)
6026 exception_print (gdb_stderr
, except
);
6030 /* Find the base address of the compilation unit for range lists and
6031 location lists. It will normally be specified by DW_AT_low_pc.
6032 In DWARF-3 draft 4, the base address could be overridden by
6033 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6034 compilation units with discontinuous ranges. */
6037 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6039 struct attribute
*attr
;
6041 cu
->base_address
.reset ();
6043 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6044 if (attr
!= nullptr)
6045 cu
->base_address
= attr
->value_as_address ();
6048 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6049 if (attr
!= nullptr)
6050 cu
->base_address
= attr
->value_as_address ();
6054 /* Helper function that returns the proper abbrev section for
6057 static struct dwarf2_section_info
*
6058 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6060 struct dwarf2_section_info
*abbrev
;
6061 dwarf2_per_bfd
*per_bfd
= this_cu
->per_bfd
;
6063 if (this_cu
->is_dwz
)
6064 abbrev
= &dwarf2_get_dwz_file (per_bfd
)->abbrev
;
6066 abbrev
= &per_bfd
->abbrev
;
6071 /* Fetch the abbreviation table offset from a comp or type unit header. */
6074 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6075 struct dwarf2_section_info
*section
,
6076 sect_offset sect_off
)
6078 bfd
*abfd
= section
->get_bfd_owner ();
6079 const gdb_byte
*info_ptr
;
6080 unsigned int initial_length_size
, offset_size
;
6083 section
->read (dwarf2_per_objfile
->objfile
);
6084 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6085 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6086 offset_size
= initial_length_size
== 4 ? 4 : 8;
6087 info_ptr
+= initial_length_size
;
6089 version
= read_2_bytes (abfd
, info_ptr
);
6093 /* Skip unit type and address size. */
6097 return (sect_offset
) read_offset (abfd
, info_ptr
, offset_size
);
6100 /* A partial symtab that is used only for include files. */
6101 struct dwarf2_include_psymtab
: public partial_symtab
6103 dwarf2_include_psymtab (const char *filename
, struct objfile
*objfile
)
6104 : partial_symtab (filename
, objfile
)
6108 void read_symtab (struct objfile
*objfile
) override
6110 /* It's an include file, no symbols to read for it.
6111 Everything is in the includer symtab. */
6113 /* The expansion of a dwarf2_include_psymtab is just a trigger for
6114 expansion of the includer psymtab. We use the dependencies[0] field to
6115 model the includer. But if we go the regular route of calling
6116 expand_psymtab here, and having expand_psymtab call expand_dependencies
6117 to expand the includer, we'll only use expand_psymtab on the includer
6118 (making it a non-toplevel psymtab), while if we expand the includer via
6119 another path, we'll use read_symtab (making it a toplevel psymtab).
6120 So, don't pretend a dwarf2_include_psymtab is an actual toplevel
6121 psymtab, and trigger read_symtab on the includer here directly. */
6122 includer ()->read_symtab (objfile
);
6125 void expand_psymtab (struct objfile
*objfile
) override
6127 /* This is not called by read_symtab, and should not be called by any
6128 expand_dependencies. */
6132 bool readin_p (struct objfile
*objfile
) const override
6134 return includer ()->readin_p (objfile
);
6137 compunit_symtab
*get_compunit_symtab (struct objfile
*objfile
) const override
6143 partial_symtab
*includer () const
6145 /* An include psymtab has exactly one dependency: the psymtab that
6147 gdb_assert (this->number_of_dependencies
== 1);
6148 return this->dependencies
[0];
6152 /* Allocate a new partial symtab for file named NAME and mark this new
6153 partial symtab as being an include of PST. */
6156 dwarf2_create_include_psymtab (const char *name
, dwarf2_psymtab
*pst
,
6157 struct objfile
*objfile
)
6159 dwarf2_include_psymtab
*subpst
= new dwarf2_include_psymtab (name
, objfile
);
6161 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6162 subpst
->dirname
= pst
->dirname
;
6164 subpst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (1);
6165 subpst
->dependencies
[0] = pst
;
6166 subpst
->number_of_dependencies
= 1;
6169 /* Read the Line Number Program data and extract the list of files
6170 included by the source file represented by PST. Build an include
6171 partial symtab for each of these included files. */
6174 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6175 struct die_info
*die
,
6176 dwarf2_psymtab
*pst
)
6179 struct attribute
*attr
;
6181 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6182 if (attr
!= nullptr)
6183 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6185 return; /* No linetable, so no includes. */
6187 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6188 that we pass in the raw text_low here; that is ok because we're
6189 only decoding the line table to make include partial symtabs, and
6190 so the addresses aren't really used. */
6191 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6192 pst
->raw_text_low (), 1);
6196 hash_signatured_type (const void *item
)
6198 const struct signatured_type
*sig_type
6199 = (const struct signatured_type
*) item
;
6201 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6202 return sig_type
->signature
;
6206 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6208 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6209 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6211 return lhs
->signature
== rhs
->signature
;
6214 /* Allocate a hash table for signatured types. */
6217 allocate_signatured_type_table ()
6219 return htab_up (htab_create_alloc (41,
6220 hash_signatured_type
,
6222 NULL
, xcalloc
, xfree
));
6225 /* A helper function to add a signatured type CU to a table. */
6228 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6230 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6231 std::vector
<signatured_type
*> *all_type_units
6232 = (std::vector
<signatured_type
*> *) datum
;
6234 all_type_units
->push_back (sigt
);
6239 /* A helper for create_debug_types_hash_table. Read types from SECTION
6240 and fill them into TYPES_HTAB. It will process only type units,
6241 therefore DW_UT_type. */
6244 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6245 struct dwo_file
*dwo_file
,
6246 dwarf2_section_info
*section
, htab_up
&types_htab
,
6247 rcuh_kind section_kind
)
6249 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6250 struct dwarf2_section_info
*abbrev_section
;
6252 const gdb_byte
*info_ptr
, *end_ptr
;
6254 abbrev_section
= (dwo_file
!= NULL
6255 ? &dwo_file
->sections
.abbrev
6256 : &dwarf2_per_objfile
->per_bfd
->abbrev
);
6258 if (dwarf_read_debug
)
6259 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6260 section
->get_name (),
6261 abbrev_section
->get_file_name ());
6263 section
->read (objfile
);
6264 info_ptr
= section
->buffer
;
6266 if (info_ptr
== NULL
)
6269 /* We can't set abfd until now because the section may be empty or
6270 not present, in which case the bfd is unknown. */
6271 abfd
= section
->get_bfd_owner ();
6273 /* We don't use cutu_reader here because we don't need to read
6274 any dies: the signature is in the header. */
6276 end_ptr
= info_ptr
+ section
->size
;
6277 while (info_ptr
< end_ptr
)
6279 struct signatured_type
*sig_type
;
6280 struct dwo_unit
*dwo_tu
;
6282 const gdb_byte
*ptr
= info_ptr
;
6283 struct comp_unit_head header
;
6284 unsigned int length
;
6286 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6288 /* Initialize it due to a false compiler warning. */
6289 header
.signature
= -1;
6290 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6292 /* We need to read the type's signature in order to build the hash
6293 table, but we don't need anything else just yet. */
6295 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6296 abbrev_section
, ptr
, section_kind
);
6298 length
= header
.get_length ();
6300 /* Skip dummy type units. */
6301 if (ptr
>= info_ptr
+ length
6302 || peek_abbrev_code (abfd
, ptr
) == 0
6303 || header
.unit_type
!= DW_UT_type
)
6309 if (types_htab
== NULL
)
6312 types_htab
= allocate_dwo_unit_table ();
6314 types_htab
= allocate_signatured_type_table ();
6320 dwo_tu
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
6322 dwo_tu
->dwo_file
= dwo_file
;
6323 dwo_tu
->signature
= header
.signature
;
6324 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6325 dwo_tu
->section
= section
;
6326 dwo_tu
->sect_off
= sect_off
;
6327 dwo_tu
->length
= length
;
6331 /* N.B.: type_offset is not usable if this type uses a DWO file.
6332 The real type_offset is in the DWO file. */
6334 sig_type
= dwarf2_per_objfile
->per_bfd
->allocate_signatured_type ();
6335 sig_type
->signature
= header
.signature
;
6336 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6337 sig_type
->per_cu
.is_debug_types
= 1;
6338 sig_type
->per_cu
.section
= section
;
6339 sig_type
->per_cu
.sect_off
= sect_off
;
6340 sig_type
->per_cu
.length
= length
;
6343 slot
= htab_find_slot (types_htab
.get (),
6344 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6346 gdb_assert (slot
!= NULL
);
6349 sect_offset dup_sect_off
;
6353 const struct dwo_unit
*dup_tu
6354 = (const struct dwo_unit
*) *slot
;
6356 dup_sect_off
= dup_tu
->sect_off
;
6360 const struct signatured_type
*dup_tu
6361 = (const struct signatured_type
*) *slot
;
6363 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6366 complaint (_("debug type entry at offset %s is duplicate to"
6367 " the entry at offset %s, signature %s"),
6368 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6369 hex_string (header
.signature
));
6371 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6373 if (dwarf_read_debug
> 1)
6374 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6375 sect_offset_str (sect_off
),
6376 hex_string (header
.signature
));
6382 /* Create the hash table of all entries in the .debug_types
6383 (or .debug_types.dwo) section(s).
6384 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6385 otherwise it is NULL.
6387 The result is a pointer to the hash table or NULL if there are no types.
6389 Note: This function processes DWO files only, not DWP files. */
6392 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6393 struct dwo_file
*dwo_file
,
6394 gdb::array_view
<dwarf2_section_info
> type_sections
,
6395 htab_up
&types_htab
)
6397 for (dwarf2_section_info
§ion
: type_sections
)
6398 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, §ion
,
6399 types_htab
, rcuh_kind::TYPE
);
6402 /* Create the hash table of all entries in the .debug_types section,
6403 and initialize all_type_units.
6404 The result is zero if there is an error (e.g. missing .debug_types section),
6405 otherwise non-zero. */
6408 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6412 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6413 &dwarf2_per_objfile
->per_bfd
->info
, types_htab
,
6414 rcuh_kind::COMPILE
);
6415 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6416 dwarf2_per_objfile
->per_bfd
->types
, types_htab
);
6417 if (types_htab
== NULL
)
6419 dwarf2_per_objfile
->per_bfd
->signatured_types
= NULL
;
6423 dwarf2_per_objfile
->per_bfd
->signatured_types
= std::move (types_htab
);
6425 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_type_units
.empty ());
6426 dwarf2_per_objfile
->per_bfd
->all_type_units
.reserve
6427 (htab_elements (dwarf2_per_objfile
->per_bfd
->signatured_types
.get ()));
6429 htab_traverse_noresize (dwarf2_per_objfile
->per_bfd
->signatured_types
.get (),
6430 add_signatured_type_cu_to_table
,
6431 &dwarf2_per_objfile
->per_bfd
->all_type_units
);
6436 /* Add an entry for signature SIG to dwarf2_per_objfile->per_bfd->signatured_types.
6437 If SLOT is non-NULL, it is the entry to use in the hash table.
6438 Otherwise we find one. */
6440 static struct signatured_type
*
6441 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6444 if (dwarf2_per_objfile
->per_bfd
->all_type_units
.size ()
6445 == dwarf2_per_objfile
->per_bfd
->all_type_units
.capacity ())
6446 ++dwarf2_per_objfile
->per_bfd
->tu_stats
.nr_all_type_units_reallocs
;
6448 signatured_type
*sig_type
= dwarf2_per_objfile
->per_bfd
->allocate_signatured_type ();
6450 dwarf2_per_objfile
->resize_symtabs ();
6452 dwarf2_per_objfile
->per_bfd
->all_type_units
.push_back (sig_type
);
6453 sig_type
->signature
= sig
;
6454 sig_type
->per_cu
.is_debug_types
= 1;
6455 if (dwarf2_per_objfile
->per_bfd
->using_index
)
6457 sig_type
->per_cu
.v
.quick
=
6458 OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
6459 struct dwarf2_per_cu_quick_data
);
6464 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->signatured_types
.get (),
6467 gdb_assert (*slot
== NULL
);
6469 /* The rest of sig_type must be filled in by the caller. */
6473 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6474 Fill in SIG_ENTRY with DWO_ENTRY. */
6477 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6478 struct signatured_type
*sig_entry
,
6479 struct dwo_unit
*dwo_entry
)
6481 dwarf2_per_bfd
*per_bfd
= dwarf2_per_objfile
->per_bfd
;
6483 /* Make sure we're not clobbering something we don't expect to. */
6484 gdb_assert (! sig_entry
->per_cu
.queued
);
6485 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6486 if (per_bfd
->using_index
)
6488 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6489 gdb_assert (!dwarf2_per_objfile
->symtab_set_p (&sig_entry
->per_cu
));
6492 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6493 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6494 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6495 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6496 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6498 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6499 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6500 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6501 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6502 sig_entry
->per_cu
.per_bfd
= per_bfd
;
6503 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6504 sig_entry
->dwo_unit
= dwo_entry
;
6507 /* Subroutine of lookup_signatured_type.
6508 If we haven't read the TU yet, create the signatured_type data structure
6509 for a TU to be read in directly from a DWO file, bypassing the stub.
6510 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6511 using .gdb_index, then when reading a CU we want to stay in the DWO file
6512 containing that CU. Otherwise we could end up reading several other DWO
6513 files (due to comdat folding) to process the transitive closure of all the
6514 mentioned TUs, and that can be slow. The current DWO file will have every
6515 type signature that it needs.
6516 We only do this for .gdb_index because in the psymtab case we already have
6517 to read all the DWOs to build the type unit groups. */
6519 static struct signatured_type
*
6520 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6522 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
6523 struct dwo_file
*dwo_file
;
6524 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6525 struct signatured_type find_sig_entry
, *sig_entry
;
6528 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->per_bfd
->using_index
);
6530 /* If TU skeletons have been removed then we may not have read in any
6532 if (dwarf2_per_objfile
->per_bfd
->signatured_types
== NULL
)
6533 dwarf2_per_objfile
->per_bfd
->signatured_types
= allocate_signatured_type_table ();
6535 /* We only ever need to read in one copy of a signatured type.
6536 Use the global signatured_types array to do our own comdat-folding
6537 of types. If this is the first time we're reading this TU, and
6538 the TU has an entry in .gdb_index, replace the recorded data from
6539 .gdb_index with this TU. */
6541 find_sig_entry
.signature
= sig
;
6542 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->signatured_types
.get (),
6543 &find_sig_entry
, INSERT
);
6544 sig_entry
= (struct signatured_type
*) *slot
;
6546 /* We can get here with the TU already read, *or* in the process of being
6547 read. Don't reassign the global entry to point to this DWO if that's
6548 the case. Also note that if the TU is already being read, it may not
6549 have come from a DWO, the program may be a mix of Fission-compiled
6550 code and non-Fission-compiled code. */
6552 /* Have we already tried to read this TU?
6553 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6554 needn't exist in the global table yet). */
6555 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6558 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6559 dwo_unit of the TU itself. */
6560 dwo_file
= cu
->dwo_unit
->dwo_file
;
6562 /* Ok, this is the first time we're reading this TU. */
6563 if (dwo_file
->tus
== NULL
)
6565 find_dwo_entry
.signature
= sig
;
6566 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
6568 if (dwo_entry
== NULL
)
6571 /* If the global table doesn't have an entry for this TU, add one. */
6572 if (sig_entry
== NULL
)
6573 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6575 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6576 sig_entry
->per_cu
.tu_read
= 1;
6580 /* Subroutine of lookup_signatured_type.
6581 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6582 then try the DWP file. If the TU stub (skeleton) has been removed then
6583 it won't be in .gdb_index. */
6585 static struct signatured_type
*
6586 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6588 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
6589 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
6590 struct dwo_unit
*dwo_entry
;
6591 struct signatured_type find_sig_entry
, *sig_entry
;
6594 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->per_bfd
->using_index
);
6595 gdb_assert (dwp_file
!= NULL
);
6597 /* If TU skeletons have been removed then we may not have read in any
6599 if (dwarf2_per_objfile
->per_bfd
->signatured_types
== NULL
)
6600 dwarf2_per_objfile
->per_bfd
->signatured_types
= allocate_signatured_type_table ();
6602 find_sig_entry
.signature
= sig
;
6603 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->signatured_types
.get (),
6604 &find_sig_entry
, INSERT
);
6605 sig_entry
= (struct signatured_type
*) *slot
;
6607 /* Have we already tried to read this TU?
6608 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6609 needn't exist in the global table yet). */
6610 if (sig_entry
!= NULL
)
6613 if (dwp_file
->tus
== NULL
)
6615 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
6616 sig
, 1 /* is_debug_types */);
6617 if (dwo_entry
== NULL
)
6620 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6621 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6626 /* Lookup a signature based type for DW_FORM_ref_sig8.
6627 Returns NULL if signature SIG is not present in the table.
6628 It is up to the caller to complain about this. */
6630 static struct signatured_type
*
6631 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6633 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
6636 && dwarf2_per_objfile
->per_bfd
->using_index
)
6638 /* We're in a DWO/DWP file, and we're using .gdb_index.
6639 These cases require special processing. */
6640 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
6641 return lookup_dwo_signatured_type (cu
, sig
);
6643 return lookup_dwp_signatured_type (cu
, sig
);
6647 struct signatured_type find_entry
, *entry
;
6649 if (dwarf2_per_objfile
->per_bfd
->signatured_types
== NULL
)
6651 find_entry
.signature
= sig
;
6652 entry
= ((struct signatured_type
*)
6653 htab_find (dwarf2_per_objfile
->per_bfd
->signatured_types
.get (),
6659 /* Low level DIE reading support. */
6661 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
6664 init_cu_die_reader (struct die_reader_specs
*reader
,
6665 struct dwarf2_cu
*cu
,
6666 struct dwarf2_section_info
*section
,
6667 struct dwo_file
*dwo_file
,
6668 struct abbrev_table
*abbrev_table
)
6670 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
6671 reader
->abfd
= section
->get_bfd_owner ();
6673 reader
->dwo_file
= dwo_file
;
6674 reader
->die_section
= section
;
6675 reader
->buffer
= section
->buffer
;
6676 reader
->buffer_end
= section
->buffer
+ section
->size
;
6677 reader
->abbrev_table
= abbrev_table
;
6680 /* Subroutine of cutu_reader to simplify it.
6681 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
6682 There's just a lot of work to do, and cutu_reader is big enough
6685 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
6686 from it to the DIE in the DWO. If NULL we are skipping the stub.
6687 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
6688 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
6689 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
6690 STUB_COMP_DIR may be non-NULL.
6691 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE
6692 are filled in with the info of the DIE from the DWO file.
6693 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
6694 from the dwo. Since *RESULT_READER references this abbrev table, it must be
6695 kept around for at least as long as *RESULT_READER.
6697 The result is non-zero if a valid (non-dummy) DIE was found. */
6700 read_cutu_die_from_dwo (dwarf2_cu
*cu
,
6701 struct dwo_unit
*dwo_unit
,
6702 struct die_info
*stub_comp_unit_die
,
6703 const char *stub_comp_dir
,
6704 struct die_reader_specs
*result_reader
,
6705 const gdb_byte
**result_info_ptr
,
6706 struct die_info
**result_comp_unit_die
,
6707 abbrev_table_up
*result_dwo_abbrev_table
)
6709 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
6710 dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6711 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6713 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6714 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
6715 int i
,num_extra_attrs
;
6716 struct dwarf2_section_info
*dwo_abbrev_section
;
6717 struct die_info
*comp_unit_die
;
6719 /* At most one of these may be provided. */
6720 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
6722 /* These attributes aren't processed until later:
6723 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
6724 DW_AT_comp_dir is used now, to find the DWO file, but it is also
6725 referenced later. However, these attributes are found in the stub
6726 which we won't have later. In order to not impose this complication
6727 on the rest of the code, we read them here and copy them to the
6736 if (stub_comp_unit_die
!= NULL
)
6738 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
6740 if (!per_cu
->is_debug_types
)
6741 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
6742 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
6743 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
6744 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
6745 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
6747 cu
->addr_base
= stub_comp_unit_die
->addr_base ();
6749 /* There should be a DW_AT_rnglists_base (DW_AT_GNU_ranges_base) attribute
6750 here (if needed). We need the value before we can process
6752 cu
->ranges_base
= stub_comp_unit_die
->ranges_base ();
6754 else if (stub_comp_dir
!= NULL
)
6756 /* Reconstruct the comp_dir attribute to simplify the code below. */
6757 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
6758 comp_dir
->name
= DW_AT_comp_dir
;
6759 comp_dir
->form
= DW_FORM_string
;
6760 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
6761 DW_STRING (comp_dir
) = stub_comp_dir
;
6764 /* Set up for reading the DWO CU/TU. */
6765 cu
->dwo_unit
= dwo_unit
;
6766 dwarf2_section_info
*section
= dwo_unit
->section
;
6767 section
->read (objfile
);
6768 abfd
= section
->get_bfd_owner ();
6769 begin_info_ptr
= info_ptr
= (section
->buffer
6770 + to_underlying (dwo_unit
->sect_off
));
6771 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
6773 if (per_cu
->is_debug_types
)
6775 signatured_type
*sig_type
= (struct signatured_type
*) per_cu
;
6777 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6778 &cu
->header
, section
,
6780 info_ptr
, rcuh_kind::TYPE
);
6781 /* This is not an assert because it can be caused by bad debug info. */
6782 if (sig_type
->signature
!= cu
->header
.signature
)
6784 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
6785 " TU at offset %s [in module %s]"),
6786 hex_string (sig_type
->signature
),
6787 hex_string (cu
->header
.signature
),
6788 sect_offset_str (dwo_unit
->sect_off
),
6789 bfd_get_filename (abfd
));
6791 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6792 /* For DWOs coming from DWP files, we don't know the CU length
6793 nor the type's offset in the TU until now. */
6794 dwo_unit
->length
= cu
->header
.get_length ();
6795 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
6797 /* Establish the type offset that can be used to lookup the type.
6798 For DWO files, we don't know it until now. */
6799 sig_type
->type_offset_in_section
6800 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
6804 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6805 &cu
->header
, section
,
6807 info_ptr
, rcuh_kind::COMPILE
);
6808 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6809 /* For DWOs coming from DWP files, we don't know the CU length
6811 dwo_unit
->length
= cu
->header
.get_length ();
6814 *result_dwo_abbrev_table
6815 = abbrev_table::read (objfile
, dwo_abbrev_section
,
6816 cu
->header
.abbrev_sect_off
);
6817 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
6818 result_dwo_abbrev_table
->get ());
6820 /* Read in the die, but leave space to copy over the attributes
6821 from the stub. This has the benefit of simplifying the rest of
6822 the code - all the work to maintain the illusion of a single
6823 DW_TAG_{compile,type}_unit DIE is done here. */
6824 num_extra_attrs
= ((stmt_list
!= NULL
)
6828 + (comp_dir
!= NULL
));
6829 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
6832 /* Copy over the attributes from the stub to the DIE we just read in. */
6833 comp_unit_die
= *result_comp_unit_die
;
6834 i
= comp_unit_die
->num_attrs
;
6835 if (stmt_list
!= NULL
)
6836 comp_unit_die
->attrs
[i
++] = *stmt_list
;
6838 comp_unit_die
->attrs
[i
++] = *low_pc
;
6839 if (high_pc
!= NULL
)
6840 comp_unit_die
->attrs
[i
++] = *high_pc
;
6842 comp_unit_die
->attrs
[i
++] = *ranges
;
6843 if (comp_dir
!= NULL
)
6844 comp_unit_die
->attrs
[i
++] = *comp_dir
;
6845 comp_unit_die
->num_attrs
+= num_extra_attrs
;
6847 if (dwarf_die_debug
)
6849 fprintf_unfiltered (gdb_stdlog
,
6850 "Read die from %s@0x%x of %s:\n",
6851 section
->get_name (),
6852 (unsigned) (begin_info_ptr
- section
->buffer
),
6853 bfd_get_filename (abfd
));
6854 dump_die (comp_unit_die
, dwarf_die_debug
);
6857 /* Skip dummy compilation units. */
6858 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
6859 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6862 *result_info_ptr
= info_ptr
;
6866 /* Return the signature of the compile unit, if found. In DWARF 4 and before,
6867 the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the
6868 signature is part of the header. */
6869 static gdb::optional
<ULONGEST
>
6870 lookup_dwo_id (struct dwarf2_cu
*cu
, struct die_info
* comp_unit_die
)
6872 if (cu
->header
.version
>= 5)
6873 return cu
->header
.signature
;
6874 struct attribute
*attr
;
6875 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
6876 if (attr
== nullptr)
6877 return gdb::optional
<ULONGEST
> ();
6878 return DW_UNSND (attr
);
6881 /* Subroutine of cutu_reader to simplify it.
6882 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
6883 Returns NULL if the specified DWO unit cannot be found. */
6885 static struct dwo_unit
*
6886 lookup_dwo_unit (dwarf2_cu
*cu
, die_info
*comp_unit_die
, const char *dwo_name
)
6888 dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6889 struct dwo_unit
*dwo_unit
;
6890 const char *comp_dir
;
6892 gdb_assert (cu
!= NULL
);
6894 /* Yeah, we look dwo_name up again, but it simplifies the code. */
6895 dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
6896 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
6898 if (per_cu
->is_debug_types
)
6899 dwo_unit
= lookup_dwo_type_unit (cu
, dwo_name
, comp_dir
);
6902 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
6904 if (!signature
.has_value ())
6905 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
6907 dwo_name
, bfd_get_filename (per_cu
->per_bfd
->obfd
));
6909 dwo_unit
= lookup_dwo_comp_unit (cu
, dwo_name
, comp_dir
, *signature
);
6915 /* Subroutine of cutu_reader to simplify it.
6916 See it for a description of the parameters.
6917 Read a TU directly from a DWO file, bypassing the stub. */
6920 cutu_reader::init_tu_and_read_dwo_dies (dwarf2_per_cu_data
*this_cu
,
6921 dwarf2_per_objfile
*per_objfile
,
6922 int use_existing_cu
)
6924 struct signatured_type
*sig_type
;
6926 /* Verify we can do the following downcast, and that we have the
6928 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
6929 sig_type
= (struct signatured_type
*) this_cu
;
6930 gdb_assert (sig_type
->dwo_unit
!= NULL
);
6932 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6934 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
6935 /* There's no need to do the rereading_dwo_cu handling that
6936 cutu_reader does since we don't read the stub. */
6940 /* If !use_existing_cu, this_cu->cu must be NULL. */
6941 gdb_assert (this_cu
->cu
== NULL
);
6942 m_new_cu
.reset (new dwarf2_cu (this_cu
, per_objfile
));
6945 /* A future optimization, if needed, would be to use an existing
6946 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
6947 could share abbrev tables. */
6949 if (read_cutu_die_from_dwo (this_cu
->cu
, sig_type
->dwo_unit
,
6950 NULL
/* stub_comp_unit_die */,
6951 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
6954 &m_dwo_abbrev_table
) == 0)
6961 /* Initialize a CU (or TU) and read its DIEs.
6962 If the CU defers to a DWO file, read the DWO file as well.
6964 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
6965 Otherwise the table specified in the comp unit header is read in and used.
6966 This is an optimization for when we already have the abbrev table.
6968 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
6969 Otherwise, a new CU is allocated with xmalloc. */
6971 cutu_reader::cutu_reader (dwarf2_per_cu_data
*this_cu
,
6972 dwarf2_per_objfile
*dwarf2_per_objfile
,
6973 struct abbrev_table
*abbrev_table
,
6974 int use_existing_cu
,
6976 : die_reader_specs
{},
6979 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6980 struct dwarf2_section_info
*section
= this_cu
->section
;
6981 bfd
*abfd
= section
->get_bfd_owner ();
6982 struct dwarf2_cu
*cu
;
6983 const gdb_byte
*begin_info_ptr
;
6984 struct signatured_type
*sig_type
= NULL
;
6985 struct dwarf2_section_info
*abbrev_section
;
6986 /* Non-zero if CU currently points to a DWO file and we need to
6987 reread it. When this happens we need to reread the skeleton die
6988 before we can reread the DWO file (this only applies to CUs, not TUs). */
6989 int rereading_dwo_cu
= 0;
6991 if (dwarf_die_debug
)
6992 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
6993 this_cu
->is_debug_types
? "type" : "comp",
6994 sect_offset_str (this_cu
->sect_off
));
6996 /* If we're reading a TU directly from a DWO file, including a virtual DWO
6997 file (instead of going through the stub), short-circuit all of this. */
6998 if (this_cu
->reading_dwo_directly
)
7000 /* Narrow down the scope of possibilities to have to understand. */
7001 gdb_assert (this_cu
->is_debug_types
);
7002 gdb_assert (abbrev_table
== NULL
);
7003 init_tu_and_read_dwo_dies (this_cu
, dwarf2_per_objfile
, use_existing_cu
);
7007 /* This is cheap if the section is already read in. */
7008 section
->read (objfile
);
7010 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7012 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
7014 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7017 /* If this CU is from a DWO file we need to start over, we need to
7018 refetch the attributes from the skeleton CU.
7019 This could be optimized by retrieving those attributes from when we
7020 were here the first time: the previous comp_unit_die was stored in
7021 comp_unit_obstack. But there's no data yet that we need this
7023 if (cu
->dwo_unit
!= NULL
)
7024 rereading_dwo_cu
= 1;
7028 /* If !use_existing_cu, this_cu->cu must be NULL. */
7029 gdb_assert (this_cu
->cu
== NULL
);
7030 m_new_cu
.reset (new dwarf2_cu (this_cu
, dwarf2_per_objfile
));
7031 cu
= m_new_cu
.get ();
7034 /* Get the header. */
7035 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7037 /* We already have the header, there's no need to read it in again. */
7038 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7042 if (this_cu
->is_debug_types
)
7044 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7045 &cu
->header
, section
,
7046 abbrev_section
, info_ptr
,
7049 /* Since per_cu is the first member of struct signatured_type,
7050 we can go from a pointer to one to a pointer to the other. */
7051 sig_type
= (struct signatured_type
*) this_cu
;
7052 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7053 gdb_assert (sig_type
->type_offset_in_tu
7054 == cu
->header
.type_cu_offset_in_tu
);
7055 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7057 /* LENGTH has not been set yet for type units if we're
7058 using .gdb_index. */
7059 this_cu
->length
= cu
->header
.get_length ();
7061 /* Establish the type offset that can be used to lookup the type. */
7062 sig_type
->type_offset_in_section
=
7063 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7065 this_cu
->dwarf_version
= cu
->header
.version
;
7069 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7070 &cu
->header
, section
,
7073 rcuh_kind::COMPILE
);
7075 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7076 if (this_cu
->length
== 0)
7077 this_cu
->length
= cu
->header
.get_length ();
7079 gdb_assert (this_cu
->length
== cu
->header
.get_length ());
7080 this_cu
->dwarf_version
= cu
->header
.version
;
7084 /* Skip dummy compilation units. */
7085 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7086 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7092 /* If we don't have them yet, read the abbrevs for this compilation unit.
7093 And if we need to read them now, make sure they're freed when we're
7095 if (abbrev_table
!= NULL
)
7096 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7099 m_abbrev_table_holder
7100 = abbrev_table::read (objfile
, abbrev_section
,
7101 cu
->header
.abbrev_sect_off
);
7102 abbrev_table
= m_abbrev_table_holder
.get ();
7105 /* Read the top level CU/TU die. */
7106 init_cu_die_reader (this, cu
, section
, NULL
, abbrev_table
);
7107 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7109 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
7115 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7116 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7117 table from the DWO file and pass the ownership over to us. It will be
7118 referenced from READER, so we must make sure to free it after we're done
7121 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7122 DWO CU, that this test will fail (the attribute will not be present). */
7123 const char *dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
7124 if (dwo_name
!= nullptr)
7126 struct dwo_unit
*dwo_unit
;
7127 struct die_info
*dwo_comp_unit_die
;
7129 if (comp_unit_die
->has_children
)
7131 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
7132 " has children (offset %s) [in module %s]"),
7133 sect_offset_str (this_cu
->sect_off
),
7134 bfd_get_filename (abfd
));
7136 dwo_unit
= lookup_dwo_unit (cu
, comp_unit_die
, dwo_name
);
7137 if (dwo_unit
!= NULL
)
7139 if (read_cutu_die_from_dwo (cu
, dwo_unit
,
7140 comp_unit_die
, NULL
,
7143 &m_dwo_abbrev_table
) == 0)
7149 comp_unit_die
= dwo_comp_unit_die
;
7153 /* Yikes, we couldn't find the rest of the DIE, we only have
7154 the stub. A complaint has already been logged. There's
7155 not much more we can do except pass on the stub DIE to
7156 die_reader_func. We don't want to throw an error on bad
7163 cutu_reader::keep ()
7165 /* Done, clean up. */
7166 gdb_assert (!dummy_p
);
7167 if (m_new_cu
!= NULL
)
7169 /* We know that m_this_cu->cu is set, since we are in the process of
7171 gdb_assert (m_this_cu
->cu
!= nullptr);
7172 dwarf2_per_objfile
*dwarf2_per_objfile
= m_this_cu
->cu
->per_objfile
;
7174 /* Link this CU into read_in_chain. */
7175 m_this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->per_bfd
->read_in_chain
;
7176 dwarf2_per_objfile
->per_bfd
->read_in_chain
= m_this_cu
;
7177 /* The chain owns it now. */
7178 m_new_cu
.release ();
7182 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name (DW_AT_dwo_name)
7183 if present. DWO_FILE, if non-NULL, is the DWO file to read (the caller is
7184 assumed to have already done the lookup to find the DWO file).
7186 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7187 THIS_CU->is_debug_types, but nothing else.
7189 We fill in THIS_CU->length.
7191 THIS_CU->cu is always freed when done.
7192 This is done in order to not leave THIS_CU->cu in a state where we have
7193 to care whether it refers to the "main" CU or the DWO CU.
7195 When parent_cu is passed, it is used to provide a default value for
7196 str_offsets_base and addr_base from the parent. */
7198 cutu_reader::cutu_reader (dwarf2_per_cu_data
*this_cu
,
7199 dwarf2_per_objfile
*dwarf2_per_objfile
,
7200 struct dwarf2_cu
*parent_cu
,
7201 struct dwo_file
*dwo_file
)
7202 : die_reader_specs
{},
7205 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7206 struct dwarf2_section_info
*section
= this_cu
->section
;
7207 bfd
*abfd
= section
->get_bfd_owner ();
7208 struct dwarf2_section_info
*abbrev_section
;
7209 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7211 if (dwarf_die_debug
)
7212 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7213 this_cu
->is_debug_types
? "type" : "comp",
7214 sect_offset_str (this_cu
->sect_off
));
7216 gdb_assert (this_cu
->cu
== NULL
);
7218 abbrev_section
= (dwo_file
!= NULL
7219 ? &dwo_file
->sections
.abbrev
7220 : get_abbrev_section_for_cu (this_cu
));
7222 /* This is cheap if the section is already read in. */
7223 section
->read (objfile
);
7225 m_new_cu
.reset (new dwarf2_cu (this_cu
, dwarf2_per_objfile
));
7227 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7228 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7229 &m_new_cu
->header
, section
,
7230 abbrev_section
, info_ptr
,
7231 (this_cu
->is_debug_types
7233 : rcuh_kind::COMPILE
));
7235 if (parent_cu
!= nullptr)
7237 m_new_cu
->str_offsets_base
= parent_cu
->str_offsets_base
;
7238 m_new_cu
->addr_base
= parent_cu
->addr_base
;
7240 this_cu
->length
= m_new_cu
->header
.get_length ();
7242 /* Skip dummy compilation units. */
7243 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7244 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7250 m_abbrev_table_holder
7251 = abbrev_table::read (objfile
, abbrev_section
,
7252 m_new_cu
->header
.abbrev_sect_off
);
7254 init_cu_die_reader (this, m_new_cu
.get (), section
, dwo_file
,
7255 m_abbrev_table_holder
.get ());
7256 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7260 /* Type Unit Groups.
7262 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7263 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7264 so that all types coming from the same compilation (.o file) are grouped
7265 together. A future step could be to put the types in the same symtab as
7266 the CU the types ultimately came from. */
7269 hash_type_unit_group (const void *item
)
7271 const struct type_unit_group
*tu_group
7272 = (const struct type_unit_group
*) item
;
7274 return hash_stmt_list_entry (&tu_group
->hash
);
7278 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7280 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7281 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7283 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7286 /* Allocate a hash table for type unit groups. */
7289 allocate_type_unit_groups_table ()
7291 return htab_up (htab_create_alloc (3,
7292 hash_type_unit_group
,
7294 NULL
, xcalloc
, xfree
));
7297 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7298 partial symtabs. We combine several TUs per psymtab to not let the size
7299 of any one psymtab grow too big. */
7300 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7301 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7303 /* Helper routine for get_type_unit_group.
7304 Create the type_unit_group object used to hold one or more TUs. */
7306 static struct type_unit_group
*
7307 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7309 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
7310 dwarf2_per_bfd
*per_bfd
= dwarf2_per_objfile
->per_bfd
;
7311 struct dwarf2_per_cu_data
*per_cu
;
7312 struct type_unit_group
*tu_group
;
7314 tu_group
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
7315 struct type_unit_group
);
7316 per_cu
= &tu_group
->per_cu
;
7317 per_cu
->per_bfd
= per_bfd
;
7319 if (per_bfd
->using_index
)
7321 per_cu
->v
.quick
= OBSTACK_ZALLOC (&per_bfd
->obstack
,
7322 struct dwarf2_per_cu_quick_data
);
7326 unsigned int line_offset
= to_underlying (line_offset_struct
);
7327 dwarf2_psymtab
*pst
;
7330 /* Give the symtab a useful name for debug purposes. */
7331 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7332 name
= string_printf ("<type_units_%d>",
7333 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7335 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7337 pst
= create_partial_symtab (per_cu
, dwarf2_per_objfile
, name
.c_str ());
7338 pst
->anonymous
= true;
7341 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7342 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7347 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7348 STMT_LIST is a DW_AT_stmt_list attribute. */
7350 static struct type_unit_group
*
7351 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7353 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
7354 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->per_bfd
->tu_stats
;
7355 struct type_unit_group
*tu_group
;
7357 unsigned int line_offset
;
7358 struct type_unit_group type_unit_group_for_lookup
;
7360 if (dwarf2_per_objfile
->per_bfd
->type_unit_groups
== NULL
)
7361 dwarf2_per_objfile
->per_bfd
->type_unit_groups
= allocate_type_unit_groups_table ();
7363 /* Do we need to create a new group, or can we use an existing one? */
7367 line_offset
= DW_UNSND (stmt_list
);
7368 ++tu_stats
->nr_symtab_sharers
;
7372 /* Ugh, no stmt_list. Rare, but we have to handle it.
7373 We can do various things here like create one group per TU or
7374 spread them over multiple groups to split up the expansion work.
7375 To avoid worst case scenarios (too many groups or too large groups)
7376 we, umm, group them in bunches. */
7377 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7378 | (tu_stats
->nr_stmt_less_type_units
7379 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7380 ++tu_stats
->nr_stmt_less_type_units
;
7383 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7384 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7385 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->type_unit_groups
.get (),
7386 &type_unit_group_for_lookup
, INSERT
);
7389 tu_group
= (struct type_unit_group
*) *slot
;
7390 gdb_assert (tu_group
!= NULL
);
7394 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7395 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7397 ++tu_stats
->nr_symtabs
;
7403 /* Partial symbol tables. */
7405 /* Create a psymtab named NAME and assign it to PER_CU.
7407 The caller must fill in the following details:
7408 dirname, textlow, texthigh. */
7410 static dwarf2_psymtab
*
7411 create_partial_symtab (dwarf2_per_cu_data
*per_cu
,
7412 dwarf2_per_objfile
*per_objfile
,
7415 struct objfile
*objfile
= per_objfile
->objfile
;
7416 dwarf2_psymtab
*pst
;
7418 pst
= new dwarf2_psymtab (name
, objfile
, per_cu
);
7420 pst
->psymtabs_addrmap_supported
= true;
7422 /* This is the glue that links PST into GDB's symbol API. */
7423 per_cu
->v
.psymtab
= pst
;
7428 /* DIE reader function for process_psymtab_comp_unit. */
7431 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7432 const gdb_byte
*info_ptr
,
7433 struct die_info
*comp_unit_die
,
7434 enum language pretend_language
)
7436 struct dwarf2_cu
*cu
= reader
->cu
;
7437 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
7438 struct objfile
*objfile
= per_objfile
->objfile
;
7439 struct gdbarch
*gdbarch
= objfile
->arch ();
7440 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7442 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7443 dwarf2_psymtab
*pst
;
7444 enum pc_bounds_kind cu_bounds_kind
;
7445 const char *filename
;
7447 gdb_assert (! per_cu
->is_debug_types
);
7449 prepare_one_comp_unit (cu
, comp_unit_die
, pretend_language
);
7451 /* Allocate a new partial symbol table structure. */
7452 gdb::unique_xmalloc_ptr
<char> debug_filename
;
7453 static const char artificial
[] = "<artificial>";
7454 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7455 if (filename
== NULL
)
7457 else if (strcmp (filename
, artificial
) == 0)
7459 debug_filename
.reset (concat (artificial
, "@",
7460 sect_offset_str (per_cu
->sect_off
),
7462 filename
= debug_filename
.get ();
7465 pst
= create_partial_symtab (per_cu
, per_objfile
, filename
);
7467 /* This must be done before calling dwarf2_build_include_psymtabs. */
7468 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7470 baseaddr
= objfile
->text_section_offset ();
7472 dwarf2_find_base_address (comp_unit_die
, cu
);
7474 /* Possibly set the default values of LOWPC and HIGHPC from
7476 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7477 &best_highpc
, cu
, pst
);
7478 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7481 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
7484 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
7486 /* Store the contiguous range if it is not empty; it can be
7487 empty for CUs with no code. */
7488 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
7492 /* Check if comp unit has_children.
7493 If so, read the rest of the partial symbols from this comp unit.
7494 If not, there's no more debug_info for this comp unit. */
7495 if (comp_unit_die
->has_children
)
7497 struct partial_die_info
*first_die
;
7498 CORE_ADDR lowpc
, highpc
;
7500 lowpc
= ((CORE_ADDR
) -1);
7501 highpc
= ((CORE_ADDR
) 0);
7503 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7505 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7506 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7508 /* If we didn't find a lowpc, set it to highpc to avoid
7509 complaints from `maint check'. */
7510 if (lowpc
== ((CORE_ADDR
) -1))
7513 /* If the compilation unit didn't have an explicit address range,
7514 then use the information extracted from its child dies. */
7515 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7518 best_highpc
= highpc
;
7521 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
7522 best_lowpc
+ baseaddr
)
7524 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
7525 best_highpc
+ baseaddr
)
7528 end_psymtab_common (objfile
, pst
);
7530 if (!cu
->per_cu
->imported_symtabs_empty ())
7533 int len
= cu
->per_cu
->imported_symtabs_size ();
7535 /* Fill in 'dependencies' here; we fill in 'users' in a
7537 pst
->number_of_dependencies
= len
;
7539 = objfile
->partial_symtabs
->allocate_dependencies (len
);
7540 for (i
= 0; i
< len
; ++i
)
7542 pst
->dependencies
[i
]
7543 = cu
->per_cu
->imported_symtabs
->at (i
)->v
.psymtab
;
7546 cu
->per_cu
->imported_symtabs_free ();
7549 /* Get the list of files included in the current compilation unit,
7550 and build a psymtab for each of them. */
7551 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
7553 if (dwarf_read_debug
)
7554 fprintf_unfiltered (gdb_stdlog
,
7555 "Psymtab for %s unit @%s: %s - %s"
7556 ", %d global, %d static syms\n",
7557 per_cu
->is_debug_types
? "type" : "comp",
7558 sect_offset_str (per_cu
->sect_off
),
7559 paddress (gdbarch
, pst
->text_low (objfile
)),
7560 paddress (gdbarch
, pst
->text_high (objfile
)),
7561 pst
->n_global_syms
, pst
->n_static_syms
);
7564 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7565 Process compilation unit THIS_CU for a psymtab. */
7568 process_psymtab_comp_unit (dwarf2_per_cu_data
*this_cu
,
7569 dwarf2_per_objfile
*per_objfile
,
7570 bool want_partial_unit
,
7571 enum language pretend_language
)
7573 /* If this compilation unit was already read in, free the
7574 cached copy in order to read it in again. This is
7575 necessary because we skipped some symbols when we first
7576 read in the compilation unit (see load_partial_dies).
7577 This problem could be avoided, but the benefit is unclear. */
7578 if (this_cu
->cu
!= NULL
)
7579 free_one_cached_comp_unit (this_cu
, per_objfile
);
7581 cutu_reader
reader (this_cu
, per_objfile
, NULL
, 0, false);
7583 switch (reader
.comp_unit_die
->tag
)
7585 case DW_TAG_compile_unit
:
7586 this_cu
->unit_type
= DW_UT_compile
;
7588 case DW_TAG_partial_unit
:
7589 this_cu
->unit_type
= DW_UT_partial
;
7599 else if (this_cu
->is_debug_types
)
7600 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7601 reader
.comp_unit_die
);
7602 else if (want_partial_unit
7603 || reader
.comp_unit_die
->tag
!= DW_TAG_partial_unit
)
7604 process_psymtab_comp_unit_reader (&reader
, reader
.info_ptr
,
7605 reader
.comp_unit_die
,
7608 this_cu
->lang
= this_cu
->cu
->language
;
7610 /* Age out any secondary CUs. */
7611 age_cached_comp_units (per_objfile
);
7614 /* Reader function for build_type_psymtabs. */
7617 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
7618 const gdb_byte
*info_ptr
,
7619 struct die_info
*type_unit_die
)
7621 struct dwarf2_per_objfile
*dwarf2_per_objfile
= reader
->cu
->per_objfile
;
7622 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7623 struct dwarf2_cu
*cu
= reader
->cu
;
7624 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7625 struct signatured_type
*sig_type
;
7626 struct type_unit_group
*tu_group
;
7627 struct attribute
*attr
;
7628 struct partial_die_info
*first_die
;
7629 CORE_ADDR lowpc
, highpc
;
7630 dwarf2_psymtab
*pst
;
7632 gdb_assert (per_cu
->is_debug_types
);
7633 sig_type
= (struct signatured_type
*) per_cu
;
7635 if (! type_unit_die
->has_children
)
7638 attr
= type_unit_die
->attr (DW_AT_stmt_list
);
7639 tu_group
= get_type_unit_group (cu
, attr
);
7641 if (tu_group
->tus
== nullptr)
7642 tu_group
->tus
= new std::vector
<signatured_type
*>;
7643 tu_group
->tus
->push_back (sig_type
);
7645 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
7646 pst
= create_partial_symtab (per_cu
, dwarf2_per_objfile
, "");
7647 pst
->anonymous
= true;
7649 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7651 lowpc
= (CORE_ADDR
) -1;
7652 highpc
= (CORE_ADDR
) 0;
7653 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
7655 end_psymtab_common (objfile
, pst
);
7658 /* Struct used to sort TUs by their abbreviation table offset. */
7660 struct tu_abbrev_offset
7662 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
7663 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
7666 signatured_type
*sig_type
;
7667 sect_offset abbrev_offset
;
7670 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
7673 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
7674 const struct tu_abbrev_offset
&b
)
7676 return a
.abbrev_offset
< b
.abbrev_offset
;
7679 /* Efficiently read all the type units.
7680 This does the bulk of the work for build_type_psymtabs.
7682 The efficiency is because we sort TUs by the abbrev table they use and
7683 only read each abbrev table once. In one program there are 200K TUs
7684 sharing 8K abbrev tables.
7686 The main purpose of this function is to support building the
7687 dwarf2_per_objfile->per_bfd->type_unit_groups table.
7688 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
7689 can collapse the search space by grouping them by stmt_list.
7690 The savings can be significant, in the same program from above the 200K TUs
7691 share 8K stmt_list tables.
7693 FUNC is expected to call get_type_unit_group, which will create the
7694 struct type_unit_group if necessary and add it to
7695 dwarf2_per_objfile->per_bfd->type_unit_groups. */
7698 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7700 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->per_bfd
->tu_stats
;
7701 abbrev_table_up abbrev_table
;
7702 sect_offset abbrev_offset
;
7704 /* It's up to the caller to not call us multiple times. */
7705 gdb_assert (dwarf2_per_objfile
->per_bfd
->type_unit_groups
== NULL
);
7707 if (dwarf2_per_objfile
->per_bfd
->all_type_units
.empty ())
7710 /* TUs typically share abbrev tables, and there can be way more TUs than
7711 abbrev tables. Sort by abbrev table to reduce the number of times we
7712 read each abbrev table in.
7713 Alternatives are to punt or to maintain a cache of abbrev tables.
7714 This is simpler and efficient enough for now.
7716 Later we group TUs by their DW_AT_stmt_list value (as this defines the
7717 symtab to use). Typically TUs with the same abbrev offset have the same
7718 stmt_list value too so in practice this should work well.
7720 The basic algorithm here is:
7722 sort TUs by abbrev table
7723 for each TU with same abbrev table:
7724 read abbrev table if first user
7725 read TU top level DIE
7726 [IWBN if DWO skeletons had DW_AT_stmt_list]
7729 if (dwarf_read_debug
)
7730 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
7732 /* Sort in a separate table to maintain the order of all_type_units
7733 for .gdb_index: TU indices directly index all_type_units. */
7734 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
7735 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->per_bfd
->all_type_units
.size ());
7737 for (signatured_type
*sig_type
: dwarf2_per_objfile
->per_bfd
->all_type_units
)
7738 sorted_by_abbrev
.emplace_back
7739 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
7740 sig_type
->per_cu
.section
,
7741 sig_type
->per_cu
.sect_off
));
7743 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
7744 sort_tu_by_abbrev_offset
);
7746 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
7748 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
7750 /* Switch to the next abbrev table if necessary. */
7751 if (abbrev_table
== NULL
7752 || tu
.abbrev_offset
!= abbrev_offset
)
7754 abbrev_offset
= tu
.abbrev_offset
;
7756 abbrev_table::read (dwarf2_per_objfile
->objfile
,
7757 &dwarf2_per_objfile
->per_bfd
->abbrev
,
7759 ++tu_stats
->nr_uniq_abbrev_tables
;
7762 cutu_reader
reader (&tu
.sig_type
->per_cu
, dwarf2_per_objfile
,
7763 abbrev_table
.get (), 0, false);
7764 if (!reader
.dummy_p
)
7765 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7766 reader
.comp_unit_die
);
7770 /* Print collected type unit statistics. */
7773 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7775 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->per_bfd
->tu_stats
;
7777 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
7778 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
7779 dwarf2_per_objfile
->per_bfd
->all_type_units
.size ());
7780 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
7781 tu_stats
->nr_uniq_abbrev_tables
);
7782 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
7783 tu_stats
->nr_symtabs
);
7784 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
7785 tu_stats
->nr_symtab_sharers
);
7786 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
7787 tu_stats
->nr_stmt_less_type_units
);
7788 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
7789 tu_stats
->nr_all_type_units_reallocs
);
7792 /* Traversal function for build_type_psymtabs. */
7795 build_type_psymtab_dependencies (void **slot
, void *info
)
7797 struct dwarf2_per_objfile
*dwarf2_per_objfile
7798 = (struct dwarf2_per_objfile
*) info
;
7799 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7800 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
7801 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
7802 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7803 int len
= (tu_group
->tus
== nullptr) ? 0 : tu_group
->tus
->size ();
7806 gdb_assert (len
> 0);
7807 gdb_assert (per_cu
->type_unit_group_p ());
7809 pst
->number_of_dependencies
= len
;
7810 pst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (len
);
7811 for (i
= 0; i
< len
; ++i
)
7813 struct signatured_type
*iter
= tu_group
->tus
->at (i
);
7814 gdb_assert (iter
->per_cu
.is_debug_types
);
7815 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
7816 iter
->type_unit_group
= tu_group
;
7819 delete tu_group
->tus
;
7820 tu_group
->tus
= nullptr;
7825 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7826 Build partial symbol tables for the .debug_types comp-units. */
7829 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7831 if (! create_all_type_units (dwarf2_per_objfile
))
7834 build_type_psymtabs_1 (dwarf2_per_objfile
);
7837 /* Traversal function for process_skeletonless_type_unit.
7838 Read a TU in a DWO file and build partial symbols for it. */
7841 process_skeletonless_type_unit (void **slot
, void *info
)
7843 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
7844 struct dwarf2_per_objfile
*dwarf2_per_objfile
7845 = (struct dwarf2_per_objfile
*) info
;
7846 struct signatured_type find_entry
, *entry
;
7848 /* If this TU doesn't exist in the global table, add it and read it in. */
7850 if (dwarf2_per_objfile
->per_bfd
->signatured_types
== NULL
)
7851 dwarf2_per_objfile
->per_bfd
->signatured_types
= allocate_signatured_type_table ();
7853 find_entry
.signature
= dwo_unit
->signature
;
7854 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->signatured_types
.get (),
7855 &find_entry
, INSERT
);
7856 /* If we've already seen this type there's nothing to do. What's happening
7857 is we're doing our own version of comdat-folding here. */
7861 /* This does the job that create_all_type_units would have done for
7863 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
7864 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
7867 /* This does the job that build_type_psymtabs_1 would have done. */
7868 cutu_reader
reader (&entry
->per_cu
, dwarf2_per_objfile
, NULL
, 0, false);
7869 if (!reader
.dummy_p
)
7870 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7871 reader
.comp_unit_die
);
7876 /* Traversal function for process_skeletonless_type_units. */
7879 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
7881 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
7883 if (dwo_file
->tus
!= NULL
)
7884 htab_traverse_noresize (dwo_file
->tus
.get (),
7885 process_skeletonless_type_unit
, info
);
7890 /* Scan all TUs of DWO files, verifying we've processed them.
7891 This is needed in case a TU was emitted without its skeleton.
7892 Note: This can't be done until we know what all the DWO files are. */
7895 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7897 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
7898 if (get_dwp_file (dwarf2_per_objfile
) == NULL
7899 && dwarf2_per_objfile
->per_bfd
->dwo_files
!= NULL
)
7901 htab_traverse_noresize (dwarf2_per_objfile
->per_bfd
->dwo_files
.get (),
7902 process_dwo_file_for_skeletonless_type_units
,
7903 dwarf2_per_objfile
);
7907 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
7910 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7912 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
7914 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7919 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
7921 /* Set the 'user' field only if it is not already set. */
7922 if (pst
->dependencies
[j
]->user
== NULL
)
7923 pst
->dependencies
[j
]->user
= pst
;
7928 /* Build the partial symbol table by doing a quick pass through the
7929 .debug_info and .debug_abbrev sections. */
7932 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7934 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7936 if (dwarf_read_debug
)
7938 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
7939 objfile_name (objfile
));
7942 scoped_restore restore_reading_psyms
7943 = make_scoped_restore (&dwarf2_per_objfile
->per_bfd
->reading_partial_symbols
,
7946 dwarf2_per_objfile
->per_bfd
->info
.read (objfile
);
7948 /* Any cached compilation units will be linked by the per-objfile
7949 read_in_chain. Make sure to free them when we're done. */
7950 free_cached_comp_units
freer (dwarf2_per_objfile
);
7952 build_type_psymtabs (dwarf2_per_objfile
);
7954 create_all_comp_units (dwarf2_per_objfile
);
7956 /* Create a temporary address map on a temporary obstack. We later
7957 copy this to the final obstack. */
7958 auto_obstack temp_obstack
;
7960 scoped_restore save_psymtabs_addrmap
7961 = make_scoped_restore (&objfile
->partial_symtabs
->psymtabs_addrmap
,
7962 addrmap_create_mutable (&temp_obstack
));
7964 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
7966 if (per_cu
->v
.psymtab
!= NULL
)
7967 /* In case a forward DW_TAG_imported_unit has read the CU already. */
7969 process_psymtab_comp_unit (per_cu
, dwarf2_per_objfile
, false,
7973 /* This has to wait until we read the CUs, we need the list of DWOs. */
7974 process_skeletonless_type_units (dwarf2_per_objfile
);
7976 /* Now that all TUs have been processed we can fill in the dependencies. */
7977 if (dwarf2_per_objfile
->per_bfd
->type_unit_groups
!= NULL
)
7979 htab_traverse_noresize (dwarf2_per_objfile
->per_bfd
->type_unit_groups
.get (),
7980 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
7983 if (dwarf_read_debug
)
7984 print_tu_stats (dwarf2_per_objfile
);
7986 set_partial_user (dwarf2_per_objfile
);
7988 objfile
->partial_symtabs
->psymtabs_addrmap
7989 = addrmap_create_fixed (objfile
->partial_symtabs
->psymtabs_addrmap
,
7990 objfile
->partial_symtabs
->obstack ());
7991 /* At this point we want to keep the address map. */
7992 save_psymtabs_addrmap
.release ();
7994 if (dwarf_read_debug
)
7995 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
7996 objfile_name (objfile
));
7999 /* Load the partial DIEs for a secondary CU into memory.
8000 This is also used when rereading a primary CU with load_all_dies. */
8003 load_partial_comp_unit (dwarf2_per_cu_data
*this_cu
,
8004 dwarf2_per_objfile
*per_objfile
)
8006 cutu_reader
reader (this_cu
, per_objfile
, NULL
, 1, false);
8008 if (!reader
.dummy_p
)
8010 prepare_one_comp_unit (reader
.cu
, reader
.comp_unit_die
,
8013 /* Check if comp unit has_children.
8014 If so, read the rest of the partial symbols from this comp unit.
8015 If not, there's no more debug_info for this comp unit. */
8016 if (reader
.comp_unit_die
->has_children
)
8017 load_partial_dies (&reader
, reader
.info_ptr
, 0);
8024 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
8025 struct dwarf2_section_info
*section
,
8026 struct dwarf2_section_info
*abbrev_section
,
8027 unsigned int is_dwz
)
8029 const gdb_byte
*info_ptr
;
8030 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8032 if (dwarf_read_debug
)
8033 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
8034 section
->get_name (),
8035 section
->get_file_name ());
8037 section
->read (objfile
);
8039 info_ptr
= section
->buffer
;
8041 while (info_ptr
< section
->buffer
+ section
->size
)
8043 struct dwarf2_per_cu_data
*this_cu
;
8045 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
8047 comp_unit_head cu_header
;
8048 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
8049 abbrev_section
, info_ptr
,
8050 rcuh_kind::COMPILE
);
8052 /* Save the compilation unit for later lookup. */
8053 if (cu_header
.unit_type
!= DW_UT_type
)
8054 this_cu
= dwarf2_per_objfile
->per_bfd
->allocate_per_cu ();
8057 auto sig_type
= dwarf2_per_objfile
->per_bfd
->allocate_signatured_type ();
8058 sig_type
->signature
= cu_header
.signature
;
8059 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
8060 this_cu
= &sig_type
->per_cu
;
8062 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
8063 this_cu
->sect_off
= sect_off
;
8064 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
8065 this_cu
->is_dwz
= is_dwz
;
8066 this_cu
->section
= section
;
8068 dwarf2_per_objfile
->per_bfd
->all_comp_units
.push_back (this_cu
);
8070 info_ptr
= info_ptr
+ this_cu
->length
;
8074 /* Create a list of all compilation units in OBJFILE.
8075 This is only done for -readnow and building partial symtabs. */
8078 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8080 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_comp_units
.empty ());
8081 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->per_bfd
->info
,
8082 &dwarf2_per_objfile
->per_bfd
->abbrev
, 0);
8084 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
->per_bfd
);
8086 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
8090 /* Process all loaded DIEs for compilation unit CU, starting at
8091 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8092 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8093 DW_AT_ranges). See the comments of add_partial_subprogram on how
8094 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8097 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8098 CORE_ADDR
*highpc
, int set_addrmap
,
8099 struct dwarf2_cu
*cu
)
8101 struct partial_die_info
*pdi
;
8103 /* Now, march along the PDI's, descending into ones which have
8104 interesting children but skipping the children of the other ones,
8105 until we reach the end of the compilation unit. */
8113 /* Anonymous namespaces or modules have no name but have interesting
8114 children, so we need to look at them. Ditto for anonymous
8117 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8118 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8119 || pdi
->tag
== DW_TAG_imported_unit
8120 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8124 case DW_TAG_subprogram
:
8125 case DW_TAG_inlined_subroutine
:
8126 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8128 case DW_TAG_constant
:
8129 case DW_TAG_variable
:
8130 case DW_TAG_typedef
:
8131 case DW_TAG_union_type
:
8132 if (!pdi
->is_declaration
8133 || (pdi
->tag
== DW_TAG_variable
&& pdi
->is_external
))
8135 add_partial_symbol (pdi
, cu
);
8138 case DW_TAG_class_type
:
8139 case DW_TAG_interface_type
:
8140 case DW_TAG_structure_type
:
8141 if (!pdi
->is_declaration
)
8143 add_partial_symbol (pdi
, cu
);
8145 if ((cu
->language
== language_rust
8146 || cu
->language
== language_cplus
) && pdi
->has_children
)
8147 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8150 case DW_TAG_enumeration_type
:
8151 if (!pdi
->is_declaration
)
8152 add_partial_enumeration (pdi
, cu
);
8154 case DW_TAG_base_type
:
8155 case DW_TAG_subrange_type
:
8156 /* File scope base type definitions are added to the partial
8158 add_partial_symbol (pdi
, cu
);
8160 case DW_TAG_namespace
:
8161 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8164 if (!pdi
->is_declaration
)
8165 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8167 case DW_TAG_imported_unit
:
8169 struct dwarf2_per_cu_data
*per_cu
;
8171 /* For now we don't handle imported units in type units. */
8172 if (cu
->per_cu
->is_debug_types
)
8174 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8175 " supported in type units [in module %s]"),
8176 objfile_name (cu
->per_objfile
->objfile
));
8179 per_cu
= dwarf2_find_containing_comp_unit
8180 (pdi
->d
.sect_off
, pdi
->is_dwz
, cu
->per_objfile
);
8182 /* Go read the partial unit, if needed. */
8183 if (per_cu
->v
.psymtab
== NULL
)
8184 process_psymtab_comp_unit (per_cu
, cu
->per_objfile
, true,
8187 cu
->per_cu
->imported_symtabs_push (per_cu
);
8190 case DW_TAG_imported_declaration
:
8191 add_partial_symbol (pdi
, cu
);
8198 /* If the die has a sibling, skip to the sibling. */
8200 pdi
= pdi
->die_sibling
;
8204 /* Functions used to compute the fully scoped name of a partial DIE.
8206 Normally, this is simple. For C++, the parent DIE's fully scoped
8207 name is concatenated with "::" and the partial DIE's name.
8208 Enumerators are an exception; they use the scope of their parent
8209 enumeration type, i.e. the name of the enumeration type is not
8210 prepended to the enumerator.
8212 There are two complexities. One is DW_AT_specification; in this
8213 case "parent" means the parent of the target of the specification,
8214 instead of the direct parent of the DIE. The other is compilers
8215 which do not emit DW_TAG_namespace; in this case we try to guess
8216 the fully qualified name of structure types from their members'
8217 linkage names. This must be done using the DIE's children rather
8218 than the children of any DW_AT_specification target. We only need
8219 to do this for structures at the top level, i.e. if the target of
8220 any DW_AT_specification (if any; otherwise the DIE itself) does not
8223 /* Compute the scope prefix associated with PDI's parent, in
8224 compilation unit CU. The result will be allocated on CU's
8225 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8226 field. NULL is returned if no prefix is necessary. */
8228 partial_die_parent_scope (struct partial_die_info
*pdi
,
8229 struct dwarf2_cu
*cu
)
8231 const char *grandparent_scope
;
8232 struct partial_die_info
*parent
, *real_pdi
;
8234 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8235 then this means the parent of the specification DIE. */
8238 while (real_pdi
->has_specification
)
8240 auto res
= find_partial_die (real_pdi
->spec_offset
,
8241 real_pdi
->spec_is_dwz
, cu
);
8246 parent
= real_pdi
->die_parent
;
8250 if (parent
->scope_set
)
8251 return parent
->scope
;
8255 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8257 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8258 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8259 Work around this problem here. */
8260 if (cu
->language
== language_cplus
8261 && parent
->tag
== DW_TAG_namespace
8262 && strcmp (parent
->name
, "::") == 0
8263 && grandparent_scope
== NULL
)
8265 parent
->scope
= NULL
;
8266 parent
->scope_set
= 1;
8270 /* Nested subroutines in Fortran get a prefix. */
8271 if (pdi
->tag
== DW_TAG_enumerator
)
8272 /* Enumerators should not get the name of the enumeration as a prefix. */
8273 parent
->scope
= grandparent_scope
;
8274 else if (parent
->tag
== DW_TAG_namespace
8275 || parent
->tag
== DW_TAG_module
8276 || parent
->tag
== DW_TAG_structure_type
8277 || parent
->tag
== DW_TAG_class_type
8278 || parent
->tag
== DW_TAG_interface_type
8279 || parent
->tag
== DW_TAG_union_type
8280 || parent
->tag
== DW_TAG_enumeration_type
8281 || (cu
->language
== language_fortran
8282 && parent
->tag
== DW_TAG_subprogram
8283 && pdi
->tag
== DW_TAG_subprogram
))
8285 if (grandparent_scope
== NULL
)
8286 parent
->scope
= parent
->name
;
8288 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8290 parent
->name
, 0, cu
);
8294 /* FIXME drow/2004-04-01: What should we be doing with
8295 function-local names? For partial symbols, we should probably be
8297 complaint (_("unhandled containing DIE tag %s for DIE at %s"),
8298 dwarf_tag_name (parent
->tag
),
8299 sect_offset_str (pdi
->sect_off
));
8300 parent
->scope
= grandparent_scope
;
8303 parent
->scope_set
= 1;
8304 return parent
->scope
;
8307 /* Return the fully scoped name associated with PDI, from compilation unit
8308 CU. The result will be allocated with malloc. */
8310 static gdb::unique_xmalloc_ptr
<char>
8311 partial_die_full_name (struct partial_die_info
*pdi
,
8312 struct dwarf2_cu
*cu
)
8314 const char *parent_scope
;
8316 /* If this is a template instantiation, we can not work out the
8317 template arguments from partial DIEs. So, unfortunately, we have
8318 to go through the full DIEs. At least any work we do building
8319 types here will be reused if full symbols are loaded later. */
8320 if (pdi
->has_template_arguments
)
8324 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8326 struct die_info
*die
;
8327 struct attribute attr
;
8328 struct dwarf2_cu
*ref_cu
= cu
;
8330 /* DW_FORM_ref_addr is using section offset. */
8331 attr
.name
= (enum dwarf_attribute
) 0;
8332 attr
.form
= DW_FORM_ref_addr
;
8333 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8334 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8336 return make_unique_xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8340 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8341 if (parent_scope
== NULL
)
8344 return gdb::unique_xmalloc_ptr
<char> (typename_concat (NULL
, parent_scope
,
8349 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8351 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
8352 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8353 struct gdbarch
*gdbarch
= objfile
->arch ();
8355 const char *actual_name
= NULL
;
8358 baseaddr
= objfile
->text_section_offset ();
8360 gdb::unique_xmalloc_ptr
<char> built_actual_name
8361 = partial_die_full_name (pdi
, cu
);
8362 if (built_actual_name
!= NULL
)
8363 actual_name
= built_actual_name
.get ();
8365 if (actual_name
== NULL
)
8366 actual_name
= pdi
->name
;
8368 partial_symbol psymbol
;
8369 memset (&psymbol
, 0, sizeof (psymbol
));
8370 psymbol
.ginfo
.set_language (cu
->language
, &objfile
->objfile_obstack
);
8371 psymbol
.ginfo
.section
= -1;
8373 /* The code below indicates that the psymbol should be installed by
8375 gdb::optional
<psymbol_placement
> where
;
8379 case DW_TAG_inlined_subroutine
:
8380 case DW_TAG_subprogram
:
8381 addr
= (gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
)
8383 if (pdi
->is_external
8384 || cu
->language
== language_ada
8385 || (cu
->language
== language_fortran
8386 && pdi
->die_parent
!= NULL
8387 && pdi
->die_parent
->tag
== DW_TAG_subprogram
))
8389 /* Normally, only "external" DIEs are part of the global scope.
8390 But in Ada and Fortran, we want to be able to access nested
8391 procedures globally. So all Ada and Fortran subprograms are
8392 stored in the global scope. */
8393 where
= psymbol_placement::GLOBAL
;
8396 where
= psymbol_placement::STATIC
;
8398 psymbol
.domain
= VAR_DOMAIN
;
8399 psymbol
.aclass
= LOC_BLOCK
;
8400 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8401 psymbol
.ginfo
.value
.address
= addr
;
8403 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8404 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8406 case DW_TAG_constant
:
8407 psymbol
.domain
= VAR_DOMAIN
;
8408 psymbol
.aclass
= LOC_STATIC
;
8409 where
= (pdi
->is_external
8410 ? psymbol_placement::GLOBAL
8411 : psymbol_placement::STATIC
);
8413 case DW_TAG_variable
:
8415 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8419 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
8421 /* A global or static variable may also have been stripped
8422 out by the linker if unused, in which case its address
8423 will be nullified; do not add such variables into partial
8424 symbol table then. */
8426 else if (pdi
->is_external
)
8429 Don't enter into the minimal symbol tables as there is
8430 a minimal symbol table entry from the ELF symbols already.
8431 Enter into partial symbol table if it has a location
8432 descriptor or a type.
8433 If the location descriptor is missing, new_symbol will create
8434 a LOC_UNRESOLVED symbol, the address of the variable will then
8435 be determined from the minimal symbol table whenever the variable
8437 The address for the partial symbol table entry is not
8438 used by GDB, but it comes in handy for debugging partial symbol
8441 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8443 psymbol
.domain
= VAR_DOMAIN
;
8444 psymbol
.aclass
= LOC_STATIC
;
8445 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8446 psymbol
.ginfo
.value
.address
= addr
;
8447 where
= psymbol_placement::GLOBAL
;
8452 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8454 /* Static Variable. Skip symbols whose value we cannot know (those
8455 without location descriptors or constant values). */
8456 if (!has_loc
&& !pdi
->has_const_value
)
8459 psymbol
.domain
= VAR_DOMAIN
;
8460 psymbol
.aclass
= LOC_STATIC
;
8461 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8463 psymbol
.ginfo
.value
.address
= addr
;
8464 where
= psymbol_placement::STATIC
;
8467 case DW_TAG_typedef
:
8468 case DW_TAG_base_type
:
8469 case DW_TAG_subrange_type
:
8470 psymbol
.domain
= VAR_DOMAIN
;
8471 psymbol
.aclass
= LOC_TYPEDEF
;
8472 where
= psymbol_placement::STATIC
;
8474 case DW_TAG_imported_declaration
:
8475 case DW_TAG_namespace
:
8476 psymbol
.domain
= VAR_DOMAIN
;
8477 psymbol
.aclass
= LOC_TYPEDEF
;
8478 where
= psymbol_placement::GLOBAL
;
8481 /* With Fortran 77 there might be a "BLOCK DATA" module
8482 available without any name. If so, we skip the module as it
8483 doesn't bring any value. */
8484 if (actual_name
!= nullptr)
8486 psymbol
.domain
= MODULE_DOMAIN
;
8487 psymbol
.aclass
= LOC_TYPEDEF
;
8488 where
= psymbol_placement::GLOBAL
;
8491 case DW_TAG_class_type
:
8492 case DW_TAG_interface_type
:
8493 case DW_TAG_structure_type
:
8494 case DW_TAG_union_type
:
8495 case DW_TAG_enumeration_type
:
8496 /* Skip external references. The DWARF standard says in the section
8497 about "Structure, Union, and Class Type Entries": "An incomplete
8498 structure, union or class type is represented by a structure,
8499 union or class entry that does not have a byte size attribute
8500 and that has a DW_AT_declaration attribute." */
8501 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8504 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8505 static vs. global. */
8506 psymbol
.domain
= STRUCT_DOMAIN
;
8507 psymbol
.aclass
= LOC_TYPEDEF
;
8508 where
= (cu
->language
== language_cplus
8509 ? psymbol_placement::GLOBAL
8510 : psymbol_placement::STATIC
);
8512 case DW_TAG_enumerator
:
8513 psymbol
.domain
= VAR_DOMAIN
;
8514 psymbol
.aclass
= LOC_CONST
;
8515 where
= (cu
->language
== language_cplus
8516 ? psymbol_placement::GLOBAL
8517 : psymbol_placement::STATIC
);
8523 if (where
.has_value ())
8525 if (built_actual_name
!= nullptr)
8526 actual_name
= objfile
->intern (actual_name
);
8527 if (pdi
->linkage_name
== nullptr || cu
->language
== language_ada
)
8528 psymbol
.ginfo
.set_linkage_name (actual_name
);
8531 psymbol
.ginfo
.set_demangled_name (actual_name
,
8532 &objfile
->objfile_obstack
);
8533 psymbol
.ginfo
.set_linkage_name (pdi
->linkage_name
);
8535 add_psymbol_to_list (psymbol
, *where
, objfile
);
8539 /* Read a partial die corresponding to a namespace; also, add a symbol
8540 corresponding to that namespace to the symbol table. NAMESPACE is
8541 the name of the enclosing namespace. */
8544 add_partial_namespace (struct partial_die_info
*pdi
,
8545 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8546 int set_addrmap
, struct dwarf2_cu
*cu
)
8548 /* Add a symbol for the namespace. */
8550 add_partial_symbol (pdi
, cu
);
8552 /* Now scan partial symbols in that namespace. */
8554 if (pdi
->has_children
)
8555 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8558 /* Read a partial die corresponding to a Fortran module. */
8561 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
8562 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
8564 /* Add a symbol for the namespace. */
8566 add_partial_symbol (pdi
, cu
);
8568 /* Now scan partial symbols in that module. */
8570 if (pdi
->has_children
)
8571 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8574 /* Read a partial die corresponding to a subprogram or an inlined
8575 subprogram and create a partial symbol for that subprogram.
8576 When the CU language allows it, this routine also defines a partial
8577 symbol for each nested subprogram that this subprogram contains.
8578 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
8579 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
8581 PDI may also be a lexical block, in which case we simply search
8582 recursively for subprograms defined inside that lexical block.
8583 Again, this is only performed when the CU language allows this
8584 type of definitions. */
8587 add_partial_subprogram (struct partial_die_info
*pdi
,
8588 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8589 int set_addrmap
, struct dwarf2_cu
*cu
)
8591 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
8593 if (pdi
->has_pc_info
)
8595 if (pdi
->lowpc
< *lowpc
)
8596 *lowpc
= pdi
->lowpc
;
8597 if (pdi
->highpc
> *highpc
)
8598 *highpc
= pdi
->highpc
;
8601 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
8602 struct gdbarch
*gdbarch
= objfile
->arch ();
8604 CORE_ADDR this_highpc
;
8605 CORE_ADDR this_lowpc
;
8607 baseaddr
= objfile
->text_section_offset ();
8609 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8610 pdi
->lowpc
+ baseaddr
)
8613 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8614 pdi
->highpc
+ baseaddr
)
8616 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
8617 this_lowpc
, this_highpc
- 1,
8618 cu
->per_cu
->v
.psymtab
);
8622 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
8624 if (!pdi
->is_declaration
)
8625 /* Ignore subprogram DIEs that do not have a name, they are
8626 illegal. Do not emit a complaint at this point, we will
8627 do so when we convert this psymtab into a symtab. */
8629 add_partial_symbol (pdi
, cu
);
8633 if (! pdi
->has_children
)
8636 if (cu
->language
== language_ada
|| cu
->language
== language_fortran
)
8638 pdi
= pdi
->die_child
;
8642 if (pdi
->tag
== DW_TAG_subprogram
8643 || pdi
->tag
== DW_TAG_inlined_subroutine
8644 || pdi
->tag
== DW_TAG_lexical_block
)
8645 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8646 pdi
= pdi
->die_sibling
;
8651 /* Read a partial die corresponding to an enumeration type. */
8654 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
8655 struct dwarf2_cu
*cu
)
8657 struct partial_die_info
*pdi
;
8659 if (enum_pdi
->name
!= NULL
)
8660 add_partial_symbol (enum_pdi
, cu
);
8662 pdi
= enum_pdi
->die_child
;
8665 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
8666 complaint (_("malformed enumerator DIE ignored"));
8668 add_partial_symbol (pdi
, cu
);
8669 pdi
= pdi
->die_sibling
;
8673 /* Return the initial uleb128 in the die at INFO_PTR. */
8676 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
8678 unsigned int bytes_read
;
8680 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8683 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
8684 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
8686 Return the corresponding abbrev, or NULL if the number is zero (indicating
8687 an empty DIE). In either case *BYTES_READ will be set to the length of
8688 the initial number. */
8690 static struct abbrev_info
*
8691 peek_die_abbrev (const die_reader_specs
&reader
,
8692 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
8694 dwarf2_cu
*cu
= reader
.cu
;
8695 bfd
*abfd
= cu
->per_objfile
->objfile
->obfd
;
8696 unsigned int abbrev_number
8697 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
8699 if (abbrev_number
== 0)
8702 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
8705 error (_("Dwarf Error: Could not find abbrev number %d in %s"
8706 " at offset %s [in module %s]"),
8707 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
8708 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
8714 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8715 Returns a pointer to the end of a series of DIEs, terminated by an empty
8716 DIE. Any children of the skipped DIEs will also be skipped. */
8718 static const gdb_byte
*
8719 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
8723 unsigned int bytes_read
;
8724 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
8727 return info_ptr
+ bytes_read
;
8729 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
8733 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8734 INFO_PTR should point just after the initial uleb128 of a DIE, and the
8735 abbrev corresponding to that skipped uleb128 should be passed in
8736 ABBREV. Returns a pointer to this DIE's sibling, skipping any
8739 static const gdb_byte
*
8740 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
8741 struct abbrev_info
*abbrev
)
8743 unsigned int bytes_read
;
8744 struct attribute attr
;
8745 bfd
*abfd
= reader
->abfd
;
8746 struct dwarf2_cu
*cu
= reader
->cu
;
8747 const gdb_byte
*buffer
= reader
->buffer
;
8748 const gdb_byte
*buffer_end
= reader
->buffer_end
;
8749 unsigned int form
, i
;
8751 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
8753 /* The only abbrev we care about is DW_AT_sibling. */
8754 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
8757 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
,
8759 if (attr
.form
== DW_FORM_ref_addr
)
8760 complaint (_("ignoring absolute DW_AT_sibling"));
8763 sect_offset off
= attr
.get_ref_die_offset ();
8764 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
8766 if (sibling_ptr
< info_ptr
)
8767 complaint (_("DW_AT_sibling points backwards"));
8768 else if (sibling_ptr
> reader
->buffer_end
)
8769 reader
->die_section
->overflow_complaint ();
8775 /* If it isn't DW_AT_sibling, skip this attribute. */
8776 form
= abbrev
->attrs
[i
].form
;
8780 case DW_FORM_ref_addr
:
8781 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
8782 and later it is offset sized. */
8783 if (cu
->header
.version
== 2)
8784 info_ptr
+= cu
->header
.addr_size
;
8786 info_ptr
+= cu
->header
.offset_size
;
8788 case DW_FORM_GNU_ref_alt
:
8789 info_ptr
+= cu
->header
.offset_size
;
8792 info_ptr
+= cu
->header
.addr_size
;
8800 case DW_FORM_flag_present
:
8801 case DW_FORM_implicit_const
:
8818 case DW_FORM_ref_sig8
:
8821 case DW_FORM_data16
:
8824 case DW_FORM_string
:
8825 read_direct_string (abfd
, info_ptr
, &bytes_read
);
8826 info_ptr
+= bytes_read
;
8828 case DW_FORM_sec_offset
:
8830 case DW_FORM_GNU_strp_alt
:
8831 info_ptr
+= cu
->header
.offset_size
;
8833 case DW_FORM_exprloc
:
8835 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8836 info_ptr
+= bytes_read
;
8838 case DW_FORM_block1
:
8839 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
8841 case DW_FORM_block2
:
8842 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
8844 case DW_FORM_block4
:
8845 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
8851 case DW_FORM_ref_udata
:
8852 case DW_FORM_GNU_addr_index
:
8853 case DW_FORM_GNU_str_index
:
8854 case DW_FORM_rnglistx
:
8855 case DW_FORM_loclistx
:
8856 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
8858 case DW_FORM_indirect
:
8859 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8860 info_ptr
+= bytes_read
;
8861 /* We need to continue parsing from here, so just go back to
8863 goto skip_attribute
;
8866 error (_("Dwarf Error: Cannot handle %s "
8867 "in DWARF reader [in module %s]"),
8868 dwarf_form_name (form
),
8869 bfd_get_filename (abfd
));
8873 if (abbrev
->has_children
)
8874 return skip_children (reader
, info_ptr
);
8879 /* Locate ORIG_PDI's sibling.
8880 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
8882 static const gdb_byte
*
8883 locate_pdi_sibling (const struct die_reader_specs
*reader
,
8884 struct partial_die_info
*orig_pdi
,
8885 const gdb_byte
*info_ptr
)
8887 /* Do we know the sibling already? */
8889 if (orig_pdi
->sibling
)
8890 return orig_pdi
->sibling
;
8892 /* Are there any children to deal with? */
8894 if (!orig_pdi
->has_children
)
8897 /* Skip the children the long way. */
8899 return skip_children (reader
, info_ptr
);
8902 /* Expand this partial symbol table into a full symbol table. SELF is
8906 dwarf2_psymtab::read_symtab (struct objfile
*objfile
)
8908 struct dwarf2_per_objfile
*dwarf2_per_objfile
8909 = get_dwarf2_per_objfile (objfile
);
8911 gdb_assert (!dwarf2_per_objfile
->symtab_set_p (per_cu_data
));
8913 /* If this psymtab is constructed from a debug-only objfile, the
8914 has_section_at_zero flag will not necessarily be correct. We
8915 can get the correct value for this flag by looking at the data
8916 associated with the (presumably stripped) associated objfile. */
8917 if (objfile
->separate_debug_objfile_backlink
)
8919 struct dwarf2_per_objfile
*dpo_backlink
8920 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
8922 dwarf2_per_objfile
->per_bfd
->has_section_at_zero
8923 = dpo_backlink
->per_bfd
->has_section_at_zero
;
8926 expand_psymtab (objfile
);
8928 process_cu_includes (dwarf2_per_objfile
);
8931 /* Reading in full CUs. */
8933 /* Add PER_CU to the queue. */
8936 queue_comp_unit (dwarf2_per_cu_data
*per_cu
,
8937 dwarf2_per_objfile
*per_objfile
,
8938 enum language pretend_language
)
8941 per_cu
->per_bfd
->queue
.emplace (per_cu
, per_objfile
, pretend_language
);
8944 /* If PER_CU is not yet queued, add it to the queue.
8945 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
8947 The result is non-zero if PER_CU was queued, otherwise the result is zero
8948 meaning either PER_CU is already queued or it is already loaded.
8950 N.B. There is an invariant here that if a CU is queued then it is loaded.
8951 The caller is required to load PER_CU if we return non-zero. */
8954 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
8955 dwarf2_per_cu_data
*per_cu
,
8956 dwarf2_per_objfile
*per_objfile
,
8957 enum language pretend_language
)
8959 /* We may arrive here during partial symbol reading, if we need full
8960 DIEs to process an unusual case (e.g. template arguments). Do
8961 not queue PER_CU, just tell our caller to load its DIEs. */
8962 if (per_cu
->per_bfd
->reading_partial_symbols
)
8964 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
8969 /* Mark the dependence relation so that we don't flush PER_CU
8971 if (dependent_cu
!= NULL
)
8972 dwarf2_add_dependence (dependent_cu
, per_cu
);
8974 /* If it's already on the queue, we have nothing to do. */
8978 /* If the compilation unit is already loaded, just mark it as
8980 if (per_cu
->cu
!= NULL
)
8982 per_cu
->cu
->last_used
= 0;
8986 /* Add it to the queue. */
8987 queue_comp_unit (per_cu
, per_objfile
, pretend_language
);
8992 /* Process the queue. */
8995 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8997 if (dwarf_read_debug
)
8999 fprintf_unfiltered (gdb_stdlog
,
9000 "Expanding one or more symtabs of objfile %s ...\n",
9001 objfile_name (dwarf2_per_objfile
->objfile
));
9004 /* The queue starts out with one item, but following a DIE reference
9005 may load a new CU, adding it to the end of the queue. */
9006 while (!dwarf2_per_objfile
->per_bfd
->queue
.empty ())
9008 dwarf2_queue_item
&item
= dwarf2_per_objfile
->per_bfd
->queue
.front ();
9010 if (!dwarf2_per_objfile
->symtab_set_p (item
.per_cu
)
9011 /* Skip dummy CUs. */
9012 && item
.per_cu
->cu
!= NULL
)
9014 struct dwarf2_per_cu_data
*per_cu
= item
.per_cu
;
9015 unsigned int debug_print_threshold
;
9018 if (per_cu
->is_debug_types
)
9020 struct signatured_type
*sig_type
=
9021 (struct signatured_type
*) per_cu
;
9023 sprintf (buf
, "TU %s at offset %s",
9024 hex_string (sig_type
->signature
),
9025 sect_offset_str (per_cu
->sect_off
));
9026 /* There can be 100s of TUs.
9027 Only print them in verbose mode. */
9028 debug_print_threshold
= 2;
9032 sprintf (buf
, "CU at offset %s",
9033 sect_offset_str (per_cu
->sect_off
));
9034 debug_print_threshold
= 1;
9037 if (dwarf_read_debug
>= debug_print_threshold
)
9038 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
9040 if (per_cu
->is_debug_types
)
9041 process_full_type_unit (per_cu
, dwarf2_per_objfile
,
9042 item
.pretend_language
);
9044 process_full_comp_unit (per_cu
, dwarf2_per_objfile
,
9045 item
.pretend_language
);
9047 if (dwarf_read_debug
>= debug_print_threshold
)
9048 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
9051 item
.per_cu
->queued
= 0;
9052 dwarf2_per_objfile
->per_bfd
->queue
.pop ();
9055 if (dwarf_read_debug
)
9057 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
9058 objfile_name (dwarf2_per_objfile
->objfile
));
9062 /* Read in full symbols for PST, and anything it depends on. */
9065 dwarf2_psymtab::expand_psymtab (struct objfile
*objfile
)
9067 gdb_assert (!readin_p (objfile
));
9069 expand_dependencies (objfile
);
9071 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
9072 dw2_do_instantiate_symtab (per_cu_data
, per_objfile
, false);
9073 gdb_assert (get_compunit_symtab (objfile
) != nullptr);
9076 /* See psympriv.h. */
9079 dwarf2_psymtab::readin_p (struct objfile
*objfile
) const
9081 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
9082 return per_objfile
->symtab_set_p (per_cu_data
);
9085 /* See psympriv.h. */
9088 dwarf2_psymtab::get_compunit_symtab (struct objfile
*objfile
) const
9090 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
9091 return per_objfile
->get_symtab (per_cu_data
);
9094 /* Trivial hash function for die_info: the hash value of a DIE
9095 is its offset in .debug_info for this objfile. */
9098 die_hash (const void *item
)
9100 const struct die_info
*die
= (const struct die_info
*) item
;
9102 return to_underlying (die
->sect_off
);
9105 /* Trivial comparison function for die_info structures: two DIEs
9106 are equal if they have the same offset. */
9109 die_eq (const void *item_lhs
, const void *item_rhs
)
9111 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9112 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9114 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9117 /* Load the DIEs associated with PER_CU into memory. */
9120 load_full_comp_unit (dwarf2_per_cu_data
*this_cu
,
9121 dwarf2_per_objfile
*per_objfile
,
9123 enum language pretend_language
)
9125 gdb_assert (! this_cu
->is_debug_types
);
9127 cutu_reader
reader (this_cu
, per_objfile
, NULL
, 1, skip_partial
);
9131 struct dwarf2_cu
*cu
= reader
.cu
;
9132 const gdb_byte
*info_ptr
= reader
.info_ptr
;
9134 gdb_assert (cu
->die_hash
== NULL
);
9136 htab_create_alloc_ex (cu
->header
.length
/ 12,
9140 &cu
->comp_unit_obstack
,
9141 hashtab_obstack_allocate
,
9142 dummy_obstack_deallocate
);
9144 if (reader
.comp_unit_die
->has_children
)
9145 reader
.comp_unit_die
->child
9146 = read_die_and_siblings (&reader
, reader
.info_ptr
,
9147 &info_ptr
, reader
.comp_unit_die
);
9148 cu
->dies
= reader
.comp_unit_die
;
9149 /* comp_unit_die is not stored in die_hash, no need. */
9151 /* We try not to read any attributes in this function, because not
9152 all CUs needed for references have been loaded yet, and symbol
9153 table processing isn't initialized. But we have to set the CU language,
9154 or we won't be able to build types correctly.
9155 Similarly, if we do not read the producer, we can not apply
9156 producer-specific interpretation. */
9157 prepare_one_comp_unit (cu
, cu
->dies
, pretend_language
);
9162 /* Add a DIE to the delayed physname list. */
9165 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9166 const char *name
, struct die_info
*die
,
9167 struct dwarf2_cu
*cu
)
9169 struct delayed_method_info mi
;
9171 mi
.fnfield_index
= fnfield_index
;
9175 cu
->method_list
.push_back (mi
);
9178 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9179 "const" / "volatile". If so, decrements LEN by the length of the
9180 modifier and return true. Otherwise return false. */
9184 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9186 size_t mod_len
= sizeof (mod
) - 1;
9187 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9195 /* Compute the physnames of any methods on the CU's method list.
9197 The computation of method physnames is delayed in order to avoid the
9198 (bad) condition that one of the method's formal parameters is of an as yet
9202 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9204 /* Only C++ delays computing physnames. */
9205 if (cu
->method_list
.empty ())
9207 gdb_assert (cu
->language
== language_cplus
);
9209 for (const delayed_method_info
&mi
: cu
->method_list
)
9211 const char *physname
;
9212 struct fn_fieldlist
*fn_flp
9213 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9214 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9215 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9216 = physname
? physname
: "";
9218 /* Since there's no tag to indicate whether a method is a
9219 const/volatile overload, extract that information out of the
9221 if (physname
!= NULL
)
9223 size_t len
= strlen (physname
);
9227 if (physname
[len
] == ')') /* shortcut */
9229 else if (check_modifier (physname
, len
, " const"))
9230 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9231 else if (check_modifier (physname
, len
, " volatile"))
9232 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9239 /* The list is no longer needed. */
9240 cu
->method_list
.clear ();
9243 /* Go objects should be embedded in a DW_TAG_module DIE,
9244 and it's not clear if/how imported objects will appear.
9245 To keep Go support simple until that's worked out,
9246 go back through what we've read and create something usable.
9247 We could do this while processing each DIE, and feels kinda cleaner,
9248 but that way is more invasive.
9249 This is to, for example, allow the user to type "p var" or "b main"
9250 without having to specify the package name, and allow lookups
9251 of module.object to work in contexts that use the expression
9255 fixup_go_packaging (struct dwarf2_cu
*cu
)
9257 gdb::unique_xmalloc_ptr
<char> package_name
;
9258 struct pending
*list
;
9261 for (list
= *cu
->get_builder ()->get_global_symbols ();
9265 for (i
= 0; i
< list
->nsyms
; ++i
)
9267 struct symbol
*sym
= list
->symbol
[i
];
9269 if (sym
->language () == language_go
9270 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9272 gdb::unique_xmalloc_ptr
<char> this_package_name
9273 (go_symbol_package_name (sym
));
9275 if (this_package_name
== NULL
)
9277 if (package_name
== NULL
)
9278 package_name
= std::move (this_package_name
);
9281 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
9282 if (strcmp (package_name
.get (), this_package_name
.get ()) != 0)
9283 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9284 (symbol_symtab (sym
) != NULL
9285 ? symtab_to_filename_for_display
9286 (symbol_symtab (sym
))
9287 : objfile_name (objfile
)),
9288 this_package_name
.get (), package_name
.get ());
9294 if (package_name
!= NULL
)
9296 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
9297 const char *saved_package_name
= objfile
->intern (package_name
.get ());
9298 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9299 saved_package_name
);
9302 sym
= new (&objfile
->objfile_obstack
) symbol
;
9303 sym
->set_language (language_go
, &objfile
->objfile_obstack
);
9304 sym
->compute_and_set_names (saved_package_name
, false, objfile
->per_bfd
);
9305 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9306 e.g., "main" finds the "main" module and not C's main(). */
9307 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9308 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9309 SYMBOL_TYPE (sym
) = type
;
9311 add_symbol_to_list (sym
, cu
->get_builder ()->get_global_symbols ());
9315 /* Allocate a fully-qualified name consisting of the two parts on the
9319 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9321 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9324 /* A helper that allocates a variant part to attach to a Rust enum
9325 type. OBSTACK is where the results should be allocated. TYPE is
9326 the type we're processing. DISCRIMINANT_INDEX is the index of the
9327 discriminant. It must be the index of one of the fields of TYPE.
9328 DEFAULT_INDEX is the index of the default field; or -1 if there is
9329 no default. RANGES is indexed by "effective" field number (the
9330 field index, but omitting the discriminant and default fields) and
9331 must hold the discriminant values used by the variants. Note that
9332 RANGES must have a lifetime at least as long as OBSTACK -- either
9333 already allocated on it, or static. */
9336 alloc_rust_variant (struct obstack
*obstack
, struct type
*type
,
9337 int discriminant_index
, int default_index
,
9338 gdb::array_view
<discriminant_range
> ranges
)
9340 /* When DISCRIMINANT_INDEX == -1, we have a univariant enum. Those
9341 must be handled by the caller. */
9342 gdb_assert (discriminant_index
>= 0
9343 && discriminant_index
< type
->num_fields ());
9344 gdb_assert (default_index
== -1
9345 || (default_index
>= 0 && default_index
< type
->num_fields ()));
9347 /* We have one variant for each non-discriminant field. */
9348 int n_variants
= type
->num_fields () - 1;
9350 variant
*variants
= new (obstack
) variant
[n_variants
];
9353 for (int i
= 0; i
< type
->num_fields (); ++i
)
9355 if (i
== discriminant_index
)
9358 variants
[var_idx
].first_field
= i
;
9359 variants
[var_idx
].last_field
= i
+ 1;
9361 /* The default field does not need a range, but other fields do.
9362 We skipped the discriminant above. */
9363 if (i
!= default_index
)
9365 variants
[var_idx
].discriminants
= ranges
.slice (range_idx
, 1);
9372 gdb_assert (range_idx
== ranges
.size ());
9373 gdb_assert (var_idx
== n_variants
);
9375 variant_part
*part
= new (obstack
) variant_part
;
9376 part
->discriminant_index
= discriminant_index
;
9377 part
->is_unsigned
= TYPE_UNSIGNED (TYPE_FIELD_TYPE (type
,
9378 discriminant_index
));
9379 part
->variants
= gdb::array_view
<variant
> (variants
, n_variants
);
9381 void *storage
= obstack_alloc (obstack
, sizeof (gdb::array_view
<variant_part
>));
9382 gdb::array_view
<variant_part
> *prop_value
9383 = new (storage
) gdb::array_view
<variant_part
> (part
, 1);
9385 struct dynamic_prop prop
;
9386 prop
.kind
= PROP_VARIANT_PARTS
;
9387 prop
.data
.variant_parts
= prop_value
;
9389 type
->add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
);
9392 /* Some versions of rustc emitted enums in an unusual way.
9394 Ordinary enums were emitted as unions. The first element of each
9395 structure in the union was named "RUST$ENUM$DISR". This element
9396 held the discriminant.
9398 These versions of Rust also implemented the "non-zero"
9399 optimization. When the enum had two values, and one is empty and
9400 the other holds a pointer that cannot be zero, the pointer is used
9401 as the discriminant, with a zero value meaning the empty variant.
9402 Here, the union's first member is of the form
9403 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9404 where the fieldnos are the indices of the fields that should be
9405 traversed in order to find the field (which may be several fields deep)
9406 and the variantname is the name of the variant of the case when the
9409 This function recognizes whether TYPE is of one of these forms,
9410 and, if so, smashes it to be a variant type. */
9413 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9415 gdb_assert (type
->code () == TYPE_CODE_UNION
);
9417 /* We don't need to deal with empty enums. */
9418 if (type
->num_fields () == 0)
9421 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9422 if (type
->num_fields () == 1
9423 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9425 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9427 /* Decode the field name to find the offset of the
9429 ULONGEST bit_offset
= 0;
9430 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9431 while (name
[0] >= '0' && name
[0] <= '9')
9434 unsigned long index
= strtoul (name
, &tail
, 10);
9437 || index
>= field_type
->num_fields ()
9438 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9439 != FIELD_LOC_KIND_BITPOS
))
9441 complaint (_("Could not parse Rust enum encoding string \"%s\""
9443 TYPE_FIELD_NAME (type
, 0),
9444 objfile_name (objfile
));
9449 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9450 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9453 /* Smash this type to be a structure type. We have to do this
9454 because the type has already been recorded. */
9455 type
->set_code (TYPE_CODE_STRUCT
);
9456 type
->set_num_fields (3);
9457 /* Save the field we care about. */
9458 struct field saved_field
= type
->field (0);
9460 ((struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
)));
9462 /* Put the discriminant at index 0. */
9463 TYPE_FIELD_TYPE (type
, 0) = field_type
;
9464 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9465 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9466 SET_FIELD_BITPOS (type
->field (0), bit_offset
);
9468 /* The order of fields doesn't really matter, so put the real
9469 field at index 1 and the data-less field at index 2. */
9470 type
->field (1) = saved_field
;
9471 TYPE_FIELD_NAME (type
, 1)
9472 = rust_last_path_segment (TYPE_FIELD_TYPE (type
, 1)->name ());
9473 TYPE_FIELD_TYPE (type
, 1)->set_name
9474 (rust_fully_qualify (&objfile
->objfile_obstack
, type
->name (),
9475 TYPE_FIELD_NAME (type
, 1)));
9477 const char *dataless_name
9478 = rust_fully_qualify (&objfile
->objfile_obstack
, type
->name (),
9480 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9482 TYPE_FIELD_TYPE (type
, 2) = dataless_type
;
9483 /* NAME points into the original discriminant name, which
9484 already has the correct lifetime. */
9485 TYPE_FIELD_NAME (type
, 2) = name
;
9486 SET_FIELD_BITPOS (type
->field (2), 0);
9488 /* Indicate that this is a variant type. */
9489 static discriminant_range ranges
[1] = { { 0, 0 } };
9490 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, 1, ranges
);
9492 /* A union with a single anonymous field is probably an old-style
9494 else if (type
->num_fields () == 1 && streq (TYPE_FIELD_NAME (type
, 0), ""))
9496 /* Smash this type to be a structure type. We have to do this
9497 because the type has already been recorded. */
9498 type
->set_code (TYPE_CODE_STRUCT
);
9500 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9501 const char *variant_name
9502 = rust_last_path_segment (field_type
->name ());
9503 TYPE_FIELD_NAME (type
, 0) = variant_name
;
9504 field_type
->set_name
9505 (rust_fully_qualify (&objfile
->objfile_obstack
,
9506 type
->name (), variant_name
));
9510 struct type
*disr_type
= nullptr;
9511 for (int i
= 0; i
< type
->num_fields (); ++i
)
9513 disr_type
= TYPE_FIELD_TYPE (type
, i
);
9515 if (disr_type
->code () != TYPE_CODE_STRUCT
)
9517 /* All fields of a true enum will be structs. */
9520 else if (disr_type
->num_fields () == 0)
9522 /* Could be data-less variant, so keep going. */
9523 disr_type
= nullptr;
9525 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
9526 "RUST$ENUM$DISR") != 0)
9528 /* Not a Rust enum. */
9538 /* If we got here without a discriminant, then it's probably
9540 if (disr_type
== nullptr)
9543 /* Smash this type to be a structure type. We have to do this
9544 because the type has already been recorded. */
9545 type
->set_code (TYPE_CODE_STRUCT
);
9547 /* Make space for the discriminant field. */
9548 struct field
*disr_field
= &disr_type
->field (0);
9550 = (struct field
*) TYPE_ZALLOC (type
, ((type
->num_fields () + 1)
9551 * sizeof (struct field
)));
9552 memcpy (new_fields
+ 1, type
->fields (),
9553 type
->num_fields () * sizeof (struct field
));
9554 type
->set_fields (new_fields
);
9555 type
->set_num_fields (type
->num_fields () + 1);
9557 /* Install the discriminant at index 0 in the union. */
9558 type
->field (0) = *disr_field
;
9559 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9560 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9562 /* We need a way to find the correct discriminant given a
9563 variant name. For convenience we build a map here. */
9564 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
9565 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
9566 for (int i
= 0; i
< enum_type
->num_fields (); ++i
)
9568 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
9571 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
9572 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
9576 int n_fields
= type
->num_fields ();
9577 /* We don't need a range entry for the discriminant, but we do
9578 need one for every other field, as there is no default
9580 discriminant_range
*ranges
= XOBNEWVEC (&objfile
->objfile_obstack
,
9583 /* Skip the discriminant here. */
9584 for (int i
= 1; i
< n_fields
; ++i
)
9586 /* Find the final word in the name of this variant's type.
9587 That name can be used to look up the correct
9589 const char *variant_name
9590 = rust_last_path_segment (TYPE_FIELD_TYPE (type
, i
)->name ());
9592 auto iter
= discriminant_map
.find (variant_name
);
9593 if (iter
!= discriminant_map
.end ())
9595 ranges
[i
].low
= iter
->second
;
9596 ranges
[i
].high
= iter
->second
;
9599 /* Remove the discriminant field, if it exists. */
9600 struct type
*sub_type
= TYPE_FIELD_TYPE (type
, i
);
9601 if (sub_type
->num_fields () > 0)
9603 sub_type
->set_num_fields (sub_type
->num_fields () - 1);
9604 sub_type
->set_fields (sub_type
->fields () + 1);
9606 TYPE_FIELD_NAME (type
, i
) = variant_name
;
9608 (rust_fully_qualify (&objfile
->objfile_obstack
,
9609 type
->name (), variant_name
));
9612 /* Indicate that this is a variant type. */
9613 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, 1,
9614 gdb::array_view
<discriminant_range
> (ranges
,
9619 /* Rewrite some Rust unions to be structures with variants parts. */
9622 rust_union_quirks (struct dwarf2_cu
*cu
)
9624 gdb_assert (cu
->language
== language_rust
);
9625 for (type
*type_
: cu
->rust_unions
)
9626 quirk_rust_enum (type_
, cu
->per_objfile
->objfile
);
9627 /* We don't need this any more. */
9628 cu
->rust_unions
.clear ();
9631 /* A helper function for computing the list of all symbol tables
9632 included by PER_CU. */
9635 recursively_compute_inclusions (std::vector
<compunit_symtab
*> *result
,
9636 htab_t all_children
, htab_t all_type_symtabs
,
9637 dwarf2_per_cu_data
*per_cu
,
9638 dwarf2_per_objfile
*per_objfile
,
9639 struct compunit_symtab
*immediate_parent
)
9641 void **slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
9644 /* This inclusion and its children have been processed. */
9650 /* Only add a CU if it has a symbol table. */
9651 compunit_symtab
*cust
= per_objfile
->get_symtab (per_cu
);
9654 /* If this is a type unit only add its symbol table if we haven't
9655 seen it yet (type unit per_cu's can share symtabs). */
9656 if (per_cu
->is_debug_types
)
9658 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
9662 result
->push_back (cust
);
9663 if (cust
->user
== NULL
)
9664 cust
->user
= immediate_parent
;
9669 result
->push_back (cust
);
9670 if (cust
->user
== NULL
)
9671 cust
->user
= immediate_parent
;
9675 if (!per_cu
->imported_symtabs_empty ())
9676 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9678 recursively_compute_inclusions (result
, all_children
,
9679 all_type_symtabs
, ptr
, per_objfile
,
9684 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
9688 compute_compunit_symtab_includes (dwarf2_per_cu_data
*per_cu
,
9689 dwarf2_per_objfile
*per_objfile
)
9691 gdb_assert (! per_cu
->is_debug_types
);
9693 if (!per_cu
->imported_symtabs_empty ())
9696 std::vector
<compunit_symtab
*> result_symtabs
;
9697 htab_t all_children
, all_type_symtabs
;
9698 compunit_symtab
*cust
= per_objfile
->get_symtab (per_cu
);
9700 /* If we don't have a symtab, we can just skip this case. */
9704 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9705 NULL
, xcalloc
, xfree
);
9706 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9707 NULL
, xcalloc
, xfree
);
9709 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9711 recursively_compute_inclusions (&result_symtabs
, all_children
,
9712 all_type_symtabs
, ptr
, per_objfile
,
9716 /* Now we have a transitive closure of all the included symtabs. */
9717 len
= result_symtabs
.size ();
9719 = XOBNEWVEC (&per_objfile
->objfile
->objfile_obstack
,
9720 struct compunit_symtab
*, len
+ 1);
9721 memcpy (cust
->includes
, result_symtabs
.data (),
9722 len
* sizeof (compunit_symtab
*));
9723 cust
->includes
[len
] = NULL
;
9725 htab_delete (all_children
);
9726 htab_delete (all_type_symtabs
);
9730 /* Compute the 'includes' field for the symtabs of all the CUs we just
9734 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9736 for (dwarf2_per_cu_data
*iter
: dwarf2_per_objfile
->per_bfd
->just_read_cus
)
9738 if (! iter
->is_debug_types
)
9739 compute_compunit_symtab_includes (iter
, dwarf2_per_objfile
);
9742 dwarf2_per_objfile
->per_bfd
->just_read_cus
.clear ();
9745 /* Generate full symbol information for PER_CU, whose DIEs have
9746 already been loaded into memory. */
9749 process_full_comp_unit (dwarf2_per_cu_data
*per_cu
,
9750 dwarf2_per_objfile
*dwarf2_per_objfile
,
9751 enum language pretend_language
)
9753 struct dwarf2_cu
*cu
= per_cu
->cu
;
9754 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9755 struct gdbarch
*gdbarch
= objfile
->arch ();
9756 CORE_ADDR lowpc
, highpc
;
9757 struct compunit_symtab
*cust
;
9759 struct block
*static_block
;
9762 baseaddr
= objfile
->text_section_offset ();
9764 /* Clear the list here in case something was left over. */
9765 cu
->method_list
.clear ();
9767 cu
->language
= pretend_language
;
9768 cu
->language_defn
= language_def (cu
->language
);
9770 /* Do line number decoding in read_file_scope () */
9771 process_die (cu
->dies
, cu
);
9773 /* For now fudge the Go package. */
9774 if (cu
->language
== language_go
)
9775 fixup_go_packaging (cu
);
9777 /* Now that we have processed all the DIEs in the CU, all the types
9778 should be complete, and it should now be safe to compute all of the
9780 compute_delayed_physnames (cu
);
9782 if (cu
->language
== language_rust
)
9783 rust_union_quirks (cu
);
9785 /* Some compilers don't define a DW_AT_high_pc attribute for the
9786 compilation unit. If the DW_AT_high_pc is missing, synthesize
9787 it, by scanning the DIE's below the compilation unit. */
9788 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
9790 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
9791 static_block
= cu
->get_builder ()->end_symtab_get_static_block (addr
, 0, 1);
9793 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
9794 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
9795 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
9796 addrmap to help ensure it has an accurate map of pc values belonging to
9798 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
9800 cust
= cu
->get_builder ()->end_symtab_from_static_block (static_block
,
9801 SECT_OFF_TEXT (objfile
),
9806 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
9808 /* Set symtab language to language from DW_AT_language. If the
9809 compilation is from a C file generated by language preprocessors, do
9810 not set the language if it was already deduced by start_subfile. */
9811 if (!(cu
->language
== language_c
9812 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
9813 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9815 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
9816 produce DW_AT_location with location lists but it can be possibly
9817 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
9818 there were bugs in prologue debug info, fixed later in GCC-4.5
9819 by "unwind info for epilogues" patch (which is not directly related).
9821 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
9822 needed, it would be wrong due to missing DW_AT_producer there.
9824 Still one can confuse GDB by using non-standard GCC compilation
9825 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
9827 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
9828 cust
->locations_valid
= 1;
9830 if (gcc_4_minor
>= 5)
9831 cust
->epilogue_unwind_valid
= 1;
9833 cust
->call_site_htab
= cu
->call_site_htab
;
9836 dwarf2_per_objfile
->set_symtab (per_cu
, cust
);
9838 /* Push it for inclusion processing later. */
9839 dwarf2_per_objfile
->per_bfd
->just_read_cus
.push_back (per_cu
);
9841 /* Not needed any more. */
9842 cu
->reset_builder ();
9845 /* Generate full symbol information for type unit PER_CU, whose DIEs have
9846 already been loaded into memory. */
9849 process_full_type_unit (dwarf2_per_cu_data
*per_cu
,
9850 dwarf2_per_objfile
*dwarf2_per_objfile
,
9851 enum language pretend_language
)
9853 struct dwarf2_cu
*cu
= per_cu
->cu
;
9854 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9855 struct compunit_symtab
*cust
;
9856 struct signatured_type
*sig_type
;
9858 gdb_assert (per_cu
->is_debug_types
);
9859 sig_type
= (struct signatured_type
*) per_cu
;
9861 /* Clear the list here in case something was left over. */
9862 cu
->method_list
.clear ();
9864 cu
->language
= pretend_language
;
9865 cu
->language_defn
= language_def (cu
->language
);
9867 /* The symbol tables are set up in read_type_unit_scope. */
9868 process_die (cu
->dies
, cu
);
9870 /* For now fudge the Go package. */
9871 if (cu
->language
== language_go
)
9872 fixup_go_packaging (cu
);
9874 /* Now that we have processed all the DIEs in the CU, all the types
9875 should be complete, and it should now be safe to compute all of the
9877 compute_delayed_physnames (cu
);
9879 if (cu
->language
== language_rust
)
9880 rust_union_quirks (cu
);
9882 /* TUs share symbol tables.
9883 If this is the first TU to use this symtab, complete the construction
9884 of it with end_expandable_symtab. Otherwise, complete the addition of
9885 this TU's symbols to the existing symtab. */
9886 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
9888 buildsym_compunit
*builder
= cu
->get_builder ();
9889 cust
= builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
9890 sig_type
->type_unit_group
->compunit_symtab
= cust
;
9894 /* Set symtab language to language from DW_AT_language. If the
9895 compilation is from a C file generated by language preprocessors,
9896 do not set the language if it was already deduced by
9898 if (!(cu
->language
== language_c
9899 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
9900 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9905 cu
->get_builder ()->augment_type_symtab ();
9906 cust
= sig_type
->type_unit_group
->compunit_symtab
;
9909 dwarf2_per_objfile
->set_symtab (per_cu
, cust
);
9911 /* Not needed any more. */
9912 cu
->reset_builder ();
9915 /* Process an imported unit DIE. */
9918 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9920 struct attribute
*attr
;
9922 /* For now we don't handle imported units in type units. */
9923 if (cu
->per_cu
->is_debug_types
)
9925 error (_("Dwarf Error: DW_TAG_imported_unit is not"
9926 " supported in type units [in module %s]"),
9927 objfile_name (cu
->per_objfile
->objfile
));
9930 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
9933 sect_offset sect_off
= attr
->get_ref_die_offset ();
9934 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
9935 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
9936 dwarf2_per_cu_data
*per_cu
9937 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
, per_objfile
);
9939 /* We're importing a C++ compilation unit with tag DW_TAG_compile_unit
9940 into another compilation unit, at root level. Regard this as a hint,
9942 if (die
->parent
&& die
->parent
->parent
== NULL
9943 && per_cu
->unit_type
== DW_UT_compile
9944 && per_cu
->lang
== language_cplus
)
9947 /* If necessary, add it to the queue and load its DIEs. */
9948 if (maybe_queue_comp_unit (cu
, per_cu
, per_objfile
, cu
->language
))
9949 load_full_comp_unit (per_cu
, per_objfile
, false, cu
->language
);
9951 cu
->per_cu
->imported_symtabs_push (per_cu
);
9955 /* RAII object that represents a process_die scope: i.e.,
9956 starts/finishes processing a DIE. */
9957 class process_die_scope
9960 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
9961 : m_die (die
), m_cu (cu
)
9963 /* We should only be processing DIEs not already in process. */
9964 gdb_assert (!m_die
->in_process
);
9965 m_die
->in_process
= true;
9968 ~process_die_scope ()
9970 m_die
->in_process
= false;
9972 /* If we're done processing the DIE for the CU that owns the line
9973 header, we don't need the line header anymore. */
9974 if (m_cu
->line_header_die_owner
== m_die
)
9976 delete m_cu
->line_header
;
9977 m_cu
->line_header
= NULL
;
9978 m_cu
->line_header_die_owner
= NULL
;
9987 /* Process a die and its children. */
9990 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9992 process_die_scope
scope (die
, cu
);
9996 case DW_TAG_padding
:
9998 case DW_TAG_compile_unit
:
9999 case DW_TAG_partial_unit
:
10000 read_file_scope (die
, cu
);
10002 case DW_TAG_type_unit
:
10003 read_type_unit_scope (die
, cu
);
10005 case DW_TAG_subprogram
:
10006 /* Nested subprograms in Fortran get a prefix. */
10007 if (cu
->language
== language_fortran
10008 && die
->parent
!= NULL
10009 && die
->parent
->tag
== DW_TAG_subprogram
)
10010 cu
->processing_has_namespace_info
= true;
10011 /* Fall through. */
10012 case DW_TAG_inlined_subroutine
:
10013 read_func_scope (die
, cu
);
10015 case DW_TAG_lexical_block
:
10016 case DW_TAG_try_block
:
10017 case DW_TAG_catch_block
:
10018 read_lexical_block_scope (die
, cu
);
10020 case DW_TAG_call_site
:
10021 case DW_TAG_GNU_call_site
:
10022 read_call_site_scope (die
, cu
);
10024 case DW_TAG_class_type
:
10025 case DW_TAG_interface_type
:
10026 case DW_TAG_structure_type
:
10027 case DW_TAG_union_type
:
10028 process_structure_scope (die
, cu
);
10030 case DW_TAG_enumeration_type
:
10031 process_enumeration_scope (die
, cu
);
10034 /* These dies have a type, but processing them does not create
10035 a symbol or recurse to process the children. Therefore we can
10036 read them on-demand through read_type_die. */
10037 case DW_TAG_subroutine_type
:
10038 case DW_TAG_set_type
:
10039 case DW_TAG_array_type
:
10040 case DW_TAG_pointer_type
:
10041 case DW_TAG_ptr_to_member_type
:
10042 case DW_TAG_reference_type
:
10043 case DW_TAG_rvalue_reference_type
:
10044 case DW_TAG_string_type
:
10047 case DW_TAG_base_type
:
10048 case DW_TAG_subrange_type
:
10049 case DW_TAG_typedef
:
10050 /* Add a typedef symbol for the type definition, if it has a
10052 new_symbol (die
, read_type_die (die
, cu
), cu
);
10054 case DW_TAG_common_block
:
10055 read_common_block (die
, cu
);
10057 case DW_TAG_common_inclusion
:
10059 case DW_TAG_namespace
:
10060 cu
->processing_has_namespace_info
= true;
10061 read_namespace (die
, cu
);
10063 case DW_TAG_module
:
10064 cu
->processing_has_namespace_info
= true;
10065 read_module (die
, cu
);
10067 case DW_TAG_imported_declaration
:
10068 cu
->processing_has_namespace_info
= true;
10069 if (read_namespace_alias (die
, cu
))
10071 /* The declaration is not a global namespace alias. */
10072 /* Fall through. */
10073 case DW_TAG_imported_module
:
10074 cu
->processing_has_namespace_info
= true;
10075 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10076 || cu
->language
!= language_fortran
))
10077 complaint (_("Tag '%s' has unexpected children"),
10078 dwarf_tag_name (die
->tag
));
10079 read_import_statement (die
, cu
);
10082 case DW_TAG_imported_unit
:
10083 process_imported_unit_die (die
, cu
);
10086 case DW_TAG_variable
:
10087 read_variable (die
, cu
);
10091 new_symbol (die
, NULL
, cu
);
10096 /* DWARF name computation. */
10098 /* A helper function for dwarf2_compute_name which determines whether DIE
10099 needs to have the name of the scope prepended to the name listed in the
10103 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10105 struct attribute
*attr
;
10109 case DW_TAG_namespace
:
10110 case DW_TAG_typedef
:
10111 case DW_TAG_class_type
:
10112 case DW_TAG_interface_type
:
10113 case DW_TAG_structure_type
:
10114 case DW_TAG_union_type
:
10115 case DW_TAG_enumeration_type
:
10116 case DW_TAG_enumerator
:
10117 case DW_TAG_subprogram
:
10118 case DW_TAG_inlined_subroutine
:
10119 case DW_TAG_member
:
10120 case DW_TAG_imported_declaration
:
10123 case DW_TAG_variable
:
10124 case DW_TAG_constant
:
10125 /* We only need to prefix "globally" visible variables. These include
10126 any variable marked with DW_AT_external or any variable that
10127 lives in a namespace. [Variables in anonymous namespaces
10128 require prefixing, but they are not DW_AT_external.] */
10130 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10132 struct dwarf2_cu
*spec_cu
= cu
;
10134 return die_needs_namespace (die_specification (die
, &spec_cu
),
10138 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10139 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10140 && die
->parent
->tag
!= DW_TAG_module
)
10142 /* A variable in a lexical block of some kind does not need a
10143 namespace, even though in C++ such variables may be external
10144 and have a mangled name. */
10145 if (die
->parent
->tag
== DW_TAG_lexical_block
10146 || die
->parent
->tag
== DW_TAG_try_block
10147 || die
->parent
->tag
== DW_TAG_catch_block
10148 || die
->parent
->tag
== DW_TAG_subprogram
)
10157 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10158 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10159 defined for the given DIE. */
10161 static struct attribute
*
10162 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10164 struct attribute
*attr
;
10166 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10168 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10173 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10174 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10175 defined for the given DIE. */
10177 static const char *
10178 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10180 const char *linkage_name
;
10182 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10183 if (linkage_name
== NULL
)
10184 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10186 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10187 See https://github.com/rust-lang/rust/issues/32925. */
10188 if (cu
->language
== language_rust
&& linkage_name
!= NULL
10189 && strchr (linkage_name
, '{') != NULL
)
10190 linkage_name
= NULL
;
10192 return linkage_name
;
10195 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10196 compute the physname for the object, which include a method's:
10197 - formal parameters (C++),
10198 - receiver type (Go),
10200 The term "physname" is a bit confusing.
10201 For C++, for example, it is the demangled name.
10202 For Go, for example, it's the mangled name.
10204 For Ada, return the DIE's linkage name rather than the fully qualified
10205 name. PHYSNAME is ignored..
10207 The result is allocated on the objfile->per_bfd's obstack and
10210 static const char *
10211 dwarf2_compute_name (const char *name
,
10212 struct die_info
*die
, struct dwarf2_cu
*cu
,
10215 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
10218 name
= dwarf2_name (die
, cu
);
10220 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10221 but otherwise compute it by typename_concat inside GDB.
10222 FIXME: Actually this is not really true, or at least not always true.
10223 It's all very confusing. compute_and_set_names doesn't try to demangle
10224 Fortran names because there is no mangling standard. So new_symbol
10225 will set the demangled name to the result of dwarf2_full_name, and it is
10226 the demangled name that GDB uses if it exists. */
10227 if (cu
->language
== language_ada
10228 || (cu
->language
== language_fortran
&& physname
))
10230 /* For Ada unit, we prefer the linkage name over the name, as
10231 the former contains the exported name, which the user expects
10232 to be able to reference. Ideally, we want the user to be able
10233 to reference this entity using either natural or linkage name,
10234 but we haven't started looking at this enhancement yet. */
10235 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10237 if (linkage_name
!= NULL
)
10238 return linkage_name
;
10241 /* These are the only languages we know how to qualify names in. */
10243 && (cu
->language
== language_cplus
10244 || cu
->language
== language_fortran
|| cu
->language
== language_d
10245 || cu
->language
== language_rust
))
10247 if (die_needs_namespace (die
, cu
))
10249 const char *prefix
;
10250 const char *canonical_name
= NULL
;
10254 prefix
= determine_prefix (die
, cu
);
10255 if (*prefix
!= '\0')
10257 gdb::unique_xmalloc_ptr
<char> prefixed_name
10258 (typename_concat (NULL
, prefix
, name
, physname
, cu
));
10260 buf
.puts (prefixed_name
.get ());
10265 /* Template parameters may be specified in the DIE's DW_AT_name, or
10266 as children with DW_TAG_template_type_param or
10267 DW_TAG_value_type_param. If the latter, add them to the name
10268 here. If the name already has template parameters, then
10269 skip this step; some versions of GCC emit both, and
10270 it is more efficient to use the pre-computed name.
10272 Something to keep in mind about this process: it is very
10273 unlikely, or in some cases downright impossible, to produce
10274 something that will match the mangled name of a function.
10275 If the definition of the function has the same debug info,
10276 we should be able to match up with it anyway. But fallbacks
10277 using the minimal symbol, for instance to find a method
10278 implemented in a stripped copy of libstdc++, will not work.
10279 If we do not have debug info for the definition, we will have to
10280 match them up some other way.
10282 When we do name matching there is a related problem with function
10283 templates; two instantiated function templates are allowed to
10284 differ only by their return types, which we do not add here. */
10286 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10288 struct attribute
*attr
;
10289 struct die_info
*child
;
10292 die
->building_fullname
= 1;
10294 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10298 const gdb_byte
*bytes
;
10299 struct dwarf2_locexpr_baton
*baton
;
10302 if (child
->tag
!= DW_TAG_template_type_param
10303 && child
->tag
!= DW_TAG_template_value_param
)
10314 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10317 complaint (_("template parameter missing DW_AT_type"));
10318 buf
.puts ("UNKNOWN_TYPE");
10321 type
= die_type (child
, cu
);
10323 if (child
->tag
== DW_TAG_template_type_param
)
10325 c_print_type (type
, "", &buf
, -1, 0, cu
->language
,
10326 &type_print_raw_options
);
10330 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10333 complaint (_("template parameter missing "
10334 "DW_AT_const_value"));
10335 buf
.puts ("UNKNOWN_VALUE");
10339 dwarf2_const_value_attr (attr
, type
, name
,
10340 &cu
->comp_unit_obstack
, cu
,
10341 &value
, &bytes
, &baton
);
10343 if (TYPE_NOSIGN (type
))
10344 /* GDB prints characters as NUMBER 'CHAR'. If that's
10345 changed, this can use value_print instead. */
10346 c_printchar (value
, type
, &buf
);
10349 struct value_print_options opts
;
10352 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10356 baton
->per_objfile
);
10357 else if (bytes
!= NULL
)
10359 v
= allocate_value (type
);
10360 memcpy (value_contents_writeable (v
), bytes
,
10361 TYPE_LENGTH (type
));
10364 v
= value_from_longest (type
, value
);
10366 /* Specify decimal so that we do not depend on
10368 get_formatted_print_options (&opts
, 'd');
10370 value_print (v
, &buf
, &opts
);
10375 die
->building_fullname
= 0;
10379 /* Close the argument list, with a space if necessary
10380 (nested templates). */
10381 if (!buf
.empty () && buf
.string ().back () == '>')
10388 /* For C++ methods, append formal parameter type
10389 information, if PHYSNAME. */
10391 if (physname
&& die
->tag
== DW_TAG_subprogram
10392 && cu
->language
== language_cplus
)
10394 struct type
*type
= read_type_die (die
, cu
);
10396 c_type_print_args (type
, &buf
, 1, cu
->language
,
10397 &type_print_raw_options
);
10399 if (cu
->language
== language_cplus
)
10401 /* Assume that an artificial first parameter is
10402 "this", but do not crash if it is not. RealView
10403 marks unnamed (and thus unused) parameters as
10404 artificial; there is no way to differentiate
10406 if (type
->num_fields () > 0
10407 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10408 && TYPE_FIELD_TYPE (type
, 0)->code () == TYPE_CODE_PTR
10409 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10411 buf
.puts (" const");
10415 const std::string
&intermediate_name
= buf
.string ();
10417 if (cu
->language
== language_cplus
)
10419 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10422 /* If we only computed INTERMEDIATE_NAME, or if
10423 INTERMEDIATE_NAME is already canonical, then we need to
10425 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10426 name
= objfile
->intern (intermediate_name
);
10428 name
= canonical_name
;
10435 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10436 If scope qualifiers are appropriate they will be added. The result
10437 will be allocated on the storage_obstack, or NULL if the DIE does
10438 not have a name. NAME may either be from a previous call to
10439 dwarf2_name or NULL.
10441 The output string will be canonicalized (if C++). */
10443 static const char *
10444 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10446 return dwarf2_compute_name (name
, die
, cu
, 0);
10449 /* Construct a physname for the given DIE in CU. NAME may either be
10450 from a previous call to dwarf2_name or NULL. The result will be
10451 allocated on the objfile_objstack or NULL if the DIE does not have a
10454 The output string will be canonicalized (if C++). */
10456 static const char *
10457 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10459 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
10460 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10463 /* In this case dwarf2_compute_name is just a shortcut not building anything
10465 if (!die_needs_namespace (die
, cu
))
10466 return dwarf2_compute_name (name
, die
, cu
, 1);
10468 if (cu
->language
!= language_rust
)
10469 mangled
= dw2_linkage_name (die
, cu
);
10471 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
10473 gdb::unique_xmalloc_ptr
<char> demangled
;
10474 if (mangled
!= NULL
)
10477 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
10479 /* Do nothing (do not demangle the symbol name). */
10481 else if (cu
->language
== language_go
)
10483 /* This is a lie, but we already lie to the caller new_symbol.
10484 new_symbol assumes we return the mangled name.
10485 This just undoes that lie until things are cleaned up. */
10489 /* Use DMGL_RET_DROP for C++ template functions to suppress
10490 their return type. It is easier for GDB users to search
10491 for such functions as `name(params)' than `long name(params)'.
10492 In such case the minimal symbol names do not match the full
10493 symbol names but for template functions there is never a need
10494 to look up their definition from their declaration so
10495 the only disadvantage remains the minimal symbol variant
10496 `long name(params)' does not have the proper inferior type. */
10497 demangled
.reset (gdb_demangle (mangled
,
10498 (DMGL_PARAMS
| DMGL_ANSI
10499 | DMGL_RET_DROP
)));
10502 canon
= demangled
.get ();
10510 if (canon
== NULL
|| check_physname
)
10512 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
10514 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
10516 /* It may not mean a bug in GDB. The compiler could also
10517 compute DW_AT_linkage_name incorrectly. But in such case
10518 GDB would need to be bug-to-bug compatible. */
10520 complaint (_("Computed physname <%s> does not match demangled <%s> "
10521 "(from linkage <%s>) - DIE at %s [in module %s]"),
10522 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
10523 objfile_name (objfile
));
10525 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
10526 is available here - over computed PHYSNAME. It is safer
10527 against both buggy GDB and buggy compilers. */
10541 retval
= objfile
->intern (retval
);
10546 /* Inspect DIE in CU for a namespace alias. If one exists, record
10547 a new symbol for it.
10549 Returns 1 if a namespace alias was recorded, 0 otherwise. */
10552 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
10554 struct attribute
*attr
;
10556 /* If the die does not have a name, this is not a namespace
10558 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
10562 struct die_info
*d
= die
;
10563 struct dwarf2_cu
*imported_cu
= cu
;
10565 /* If the compiler has nested DW_AT_imported_declaration DIEs,
10566 keep inspecting DIEs until we hit the underlying import. */
10567 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
10568 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
10570 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
10574 d
= follow_die_ref (d
, attr
, &imported_cu
);
10575 if (d
->tag
!= DW_TAG_imported_declaration
)
10579 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
10581 complaint (_("DIE at %s has too many recursively imported "
10582 "declarations"), sect_offset_str (d
->sect_off
));
10589 sect_offset sect_off
= attr
->get_ref_die_offset ();
10591 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
, cu
->per_objfile
);
10592 if (type
!= NULL
&& type
->code () == TYPE_CODE_NAMESPACE
)
10594 /* This declaration is a global namespace alias. Add
10595 a symbol for it whose type is the aliased namespace. */
10596 new_symbol (die
, type
, cu
);
10605 /* Return the using directives repository (global or local?) to use in the
10606 current context for CU.
10608 For Ada, imported declarations can materialize renamings, which *may* be
10609 global. However it is impossible (for now?) in DWARF to distinguish
10610 "external" imported declarations and "static" ones. As all imported
10611 declarations seem to be static in all other languages, make them all CU-wide
10612 global only in Ada. */
10614 static struct using_direct
**
10615 using_directives (struct dwarf2_cu
*cu
)
10617 if (cu
->language
== language_ada
10618 && cu
->get_builder ()->outermost_context_p ())
10619 return cu
->get_builder ()->get_global_using_directives ();
10621 return cu
->get_builder ()->get_local_using_directives ();
10624 /* Read the import statement specified by the given die and record it. */
10627 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
10629 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
10630 struct attribute
*import_attr
;
10631 struct die_info
*imported_die
, *child_die
;
10632 struct dwarf2_cu
*imported_cu
;
10633 const char *imported_name
;
10634 const char *imported_name_prefix
;
10635 const char *canonical_name
;
10636 const char *import_alias
;
10637 const char *imported_declaration
= NULL
;
10638 const char *import_prefix
;
10639 std::vector
<const char *> excludes
;
10641 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10642 if (import_attr
== NULL
)
10644 complaint (_("Tag '%s' has no DW_AT_import"),
10645 dwarf_tag_name (die
->tag
));
10650 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
10651 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10652 if (imported_name
== NULL
)
10654 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
10656 The import in the following code:
10670 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
10671 <52> DW_AT_decl_file : 1
10672 <53> DW_AT_decl_line : 6
10673 <54> DW_AT_import : <0x75>
10674 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
10675 <59> DW_AT_name : B
10676 <5b> DW_AT_decl_file : 1
10677 <5c> DW_AT_decl_line : 2
10678 <5d> DW_AT_type : <0x6e>
10680 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
10681 <76> DW_AT_byte_size : 4
10682 <77> DW_AT_encoding : 5 (signed)
10684 imports the wrong die ( 0x75 instead of 0x58 ).
10685 This case will be ignored until the gcc bug is fixed. */
10689 /* Figure out the local name after import. */
10690 import_alias
= dwarf2_name (die
, cu
);
10692 /* Figure out where the statement is being imported to. */
10693 import_prefix
= determine_prefix (die
, cu
);
10695 /* Figure out what the scope of the imported die is and prepend it
10696 to the name of the imported die. */
10697 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
10699 if (imported_die
->tag
!= DW_TAG_namespace
10700 && imported_die
->tag
!= DW_TAG_module
)
10702 imported_declaration
= imported_name
;
10703 canonical_name
= imported_name_prefix
;
10705 else if (strlen (imported_name_prefix
) > 0)
10706 canonical_name
= obconcat (&objfile
->objfile_obstack
,
10707 imported_name_prefix
,
10708 (cu
->language
== language_d
? "." : "::"),
10709 imported_name
, (char *) NULL
);
10711 canonical_name
= imported_name
;
10713 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
10714 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
10715 child_die
= child_die
->sibling
)
10717 /* DWARF-4: A Fortran use statement with a “rename list” may be
10718 represented by an imported module entry with an import attribute
10719 referring to the module and owned entries corresponding to those
10720 entities that are renamed as part of being imported. */
10722 if (child_die
->tag
!= DW_TAG_imported_declaration
)
10724 complaint (_("child DW_TAG_imported_declaration expected "
10725 "- DIE at %s [in module %s]"),
10726 sect_offset_str (child_die
->sect_off
),
10727 objfile_name (objfile
));
10731 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
10732 if (import_attr
== NULL
)
10734 complaint (_("Tag '%s' has no DW_AT_import"),
10735 dwarf_tag_name (child_die
->tag
));
10740 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
10742 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10743 if (imported_name
== NULL
)
10745 complaint (_("child DW_TAG_imported_declaration has unknown "
10746 "imported name - DIE at %s [in module %s]"),
10747 sect_offset_str (child_die
->sect_off
),
10748 objfile_name (objfile
));
10752 excludes
.push_back (imported_name
);
10754 process_die (child_die
, cu
);
10757 add_using_directive (using_directives (cu
),
10761 imported_declaration
,
10764 &objfile
->objfile_obstack
);
10767 /* ICC<14 does not output the required DW_AT_declaration on incomplete
10768 types, but gives them a size of zero. Starting with version 14,
10769 ICC is compatible with GCC. */
10772 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
10774 if (!cu
->checked_producer
)
10775 check_producer (cu
);
10777 return cu
->producer_is_icc_lt_14
;
10780 /* ICC generates a DW_AT_type for C void functions. This was observed on
10781 ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2)
10782 which says that void functions should not have a DW_AT_type. */
10785 producer_is_icc (struct dwarf2_cu
*cu
)
10787 if (!cu
->checked_producer
)
10788 check_producer (cu
);
10790 return cu
->producer_is_icc
;
10793 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
10794 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
10795 this, it was first present in GCC release 4.3.0. */
10798 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
10800 if (!cu
->checked_producer
)
10801 check_producer (cu
);
10803 return cu
->producer_is_gcc_lt_4_3
;
10806 static file_and_directory
10807 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
10809 file_and_directory res
;
10811 /* Find the filename. Do not use dwarf2_name here, since the filename
10812 is not a source language identifier. */
10813 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
10814 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
10816 if (res
.comp_dir
== NULL
10817 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
10818 && IS_ABSOLUTE_PATH (res
.name
))
10820 res
.comp_dir_storage
= ldirname (res
.name
);
10821 if (!res
.comp_dir_storage
.empty ())
10822 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
10824 if (res
.comp_dir
!= NULL
)
10826 /* Irix 6.2 native cc prepends <machine>.: to the compilation
10827 directory, get rid of it. */
10828 const char *cp
= strchr (res
.comp_dir
, ':');
10830 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
10831 res
.comp_dir
= cp
+ 1;
10834 if (res
.name
== NULL
)
10835 res
.name
= "<unknown>";
10840 /* Handle DW_AT_stmt_list for a compilation unit.
10841 DIE is the DW_TAG_compile_unit die for CU.
10842 COMP_DIR is the compilation directory. LOWPC is passed to
10843 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
10846 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
10847 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
10849 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
10850 struct attribute
*attr
;
10851 struct line_header line_header_local
;
10852 hashval_t line_header_local_hash
;
10854 int decode_mapping
;
10856 gdb_assert (! cu
->per_cu
->is_debug_types
);
10858 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
10862 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10864 /* The line header hash table is only created if needed (it exists to
10865 prevent redundant reading of the line table for partial_units).
10866 If we're given a partial_unit, we'll need it. If we're given a
10867 compile_unit, then use the line header hash table if it's already
10868 created, but don't create one just yet. */
10870 if (dwarf2_per_objfile
->per_bfd
->line_header_hash
== NULL
10871 && die
->tag
== DW_TAG_partial_unit
)
10873 dwarf2_per_objfile
->per_bfd
->line_header_hash
10874 .reset (htab_create_alloc (127, line_header_hash_voidp
,
10875 line_header_eq_voidp
,
10876 free_line_header_voidp
,
10880 line_header_local
.sect_off
= line_offset
;
10881 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
10882 line_header_local_hash
= line_header_hash (&line_header_local
);
10883 if (dwarf2_per_objfile
->per_bfd
->line_header_hash
!= NULL
)
10885 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->per_bfd
->line_header_hash
.get (),
10886 &line_header_local
,
10887 line_header_local_hash
, NO_INSERT
);
10889 /* For DW_TAG_compile_unit we need info like symtab::linetable which
10890 is not present in *SLOT (since if there is something in *SLOT then
10891 it will be for a partial_unit). */
10892 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
10894 gdb_assert (*slot
!= NULL
);
10895 cu
->line_header
= (struct line_header
*) *slot
;
10900 /* dwarf_decode_line_header does not yet provide sufficient information.
10901 We always have to call also dwarf_decode_lines for it. */
10902 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
10906 cu
->line_header
= lh
.release ();
10907 cu
->line_header_die_owner
= die
;
10909 if (dwarf2_per_objfile
->per_bfd
->line_header_hash
== NULL
)
10913 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->per_bfd
->line_header_hash
.get (),
10914 &line_header_local
,
10915 line_header_local_hash
, INSERT
);
10916 gdb_assert (slot
!= NULL
);
10918 if (slot
!= NULL
&& *slot
== NULL
)
10920 /* This newly decoded line number information unit will be owned
10921 by line_header_hash hash table. */
10922 *slot
= cu
->line_header
;
10923 cu
->line_header_die_owner
= NULL
;
10927 /* We cannot free any current entry in (*slot) as that struct line_header
10928 may be already used by multiple CUs. Create only temporary decoded
10929 line_header for this CU - it may happen at most once for each line
10930 number information unit. And if we're not using line_header_hash
10931 then this is what we want as well. */
10932 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
10934 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
10935 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
10940 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
10943 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10945 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
10946 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10947 struct gdbarch
*gdbarch
= objfile
->arch ();
10948 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
10949 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
10950 struct attribute
*attr
;
10951 struct die_info
*child_die
;
10952 CORE_ADDR baseaddr
;
10954 prepare_one_comp_unit (cu
, die
, cu
->language
);
10955 baseaddr
= objfile
->text_section_offset ();
10957 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
10959 /* If we didn't find a lowpc, set it to highpc to avoid complaints
10960 from finish_block. */
10961 if (lowpc
== ((CORE_ADDR
) -1))
10963 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
10965 file_and_directory fnd
= find_file_and_directory (die
, cu
);
10967 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
10968 standardised yet. As a workaround for the language detection we fall
10969 back to the DW_AT_producer string. */
10970 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
10971 cu
->language
= language_opencl
;
10973 /* Similar hack for Go. */
10974 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
10975 set_cu_language (DW_LANG_Go
, cu
);
10977 cu
->start_symtab (fnd
.name
, fnd
.comp_dir
, lowpc
);
10979 /* Decode line number information if present. We do this before
10980 processing child DIEs, so that the line header table is available
10981 for DW_AT_decl_file. */
10982 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
10984 /* Process all dies in compilation unit. */
10985 if (die
->child
!= NULL
)
10987 child_die
= die
->child
;
10988 while (child_die
&& child_die
->tag
)
10990 process_die (child_die
, cu
);
10991 child_die
= child_die
->sibling
;
10995 /* Decode macro information, if present. Dwarf 2 macro information
10996 refers to information in the line number info statement program
10997 header, so we can only read it if we've read the header
10999 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11001 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11002 if (attr
&& cu
->line_header
)
11004 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11005 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11007 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
11011 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11012 if (attr
&& cu
->line_header
)
11014 unsigned int macro_offset
= DW_UNSND (attr
);
11016 dwarf_decode_macros (cu
, macro_offset
, 0);
11022 dwarf2_cu::setup_type_unit_groups (struct die_info
*die
)
11024 struct type_unit_group
*tu_group
;
11026 struct attribute
*attr
;
11028 struct signatured_type
*sig_type
;
11030 gdb_assert (per_cu
->is_debug_types
);
11031 sig_type
= (struct signatured_type
*) per_cu
;
11033 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, this);
11035 /* If we're using .gdb_index (includes -readnow) then
11036 per_cu->type_unit_group may not have been set up yet. */
11037 if (sig_type
->type_unit_group
== NULL
)
11038 sig_type
->type_unit_group
= get_type_unit_group (this, attr
);
11039 tu_group
= sig_type
->type_unit_group
;
11041 /* If we've already processed this stmt_list there's no real need to
11042 do it again, we could fake it and just recreate the part we need
11043 (file name,index -> symtab mapping). If data shows this optimization
11044 is useful we can do it then. */
11045 first_time
= tu_group
->compunit_symtab
== NULL
;
11047 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11052 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11053 lh
= dwarf_decode_line_header (line_offset
, this);
11058 start_symtab ("", NULL
, 0);
11061 gdb_assert (tu_group
->symtabs
== NULL
);
11062 gdb_assert (m_builder
== nullptr);
11063 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11064 m_builder
.reset (new struct buildsym_compunit
11065 (COMPUNIT_OBJFILE (cust
), "",
11066 COMPUNIT_DIRNAME (cust
),
11067 compunit_language (cust
),
11069 list_in_scope
= get_builder ()->get_file_symbols ();
11074 line_header
= lh
.release ();
11075 line_header_die_owner
= die
;
11079 struct compunit_symtab
*cust
= start_symtab ("", NULL
, 0);
11081 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11082 still initializing it, and our caller (a few levels up)
11083 process_full_type_unit still needs to know if this is the first
11087 = XOBNEWVEC (&COMPUNIT_OBJFILE (cust
)->objfile_obstack
,
11088 struct symtab
*, line_header
->file_names_size ());
11090 auto &file_names
= line_header
->file_names ();
11091 for (i
= 0; i
< file_names
.size (); ++i
)
11093 file_entry
&fe
= file_names
[i
];
11094 dwarf2_start_subfile (this, fe
.name
,
11095 fe
.include_dir (line_header
));
11096 buildsym_compunit
*b
= get_builder ();
11097 if (b
->get_current_subfile ()->symtab
== NULL
)
11099 /* NOTE: start_subfile will recognize when it's been
11100 passed a file it has already seen. So we can't
11101 assume there's a simple mapping from
11102 cu->line_header->file_names to subfiles, plus
11103 cu->line_header->file_names may contain dups. */
11104 b
->get_current_subfile ()->symtab
11105 = allocate_symtab (cust
, b
->get_current_subfile ()->name
);
11108 fe
.symtab
= b
->get_current_subfile ()->symtab
;
11109 tu_group
->symtabs
[i
] = fe
.symtab
;
11114 gdb_assert (m_builder
== nullptr);
11115 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11116 m_builder
.reset (new struct buildsym_compunit
11117 (COMPUNIT_OBJFILE (cust
), "",
11118 COMPUNIT_DIRNAME (cust
),
11119 compunit_language (cust
),
11121 list_in_scope
= get_builder ()->get_file_symbols ();
11123 auto &file_names
= line_header
->file_names ();
11124 for (i
= 0; i
< file_names
.size (); ++i
)
11126 file_entry
&fe
= file_names
[i
];
11127 fe
.symtab
= tu_group
->symtabs
[i
];
11131 /* The main symtab is allocated last. Type units don't have DW_AT_name
11132 so they don't have a "real" (so to speak) symtab anyway.
11133 There is later code that will assign the main symtab to all symbols
11134 that don't have one. We need to handle the case of a symbol with a
11135 missing symtab (DW_AT_decl_file) anyway. */
11138 /* Process DW_TAG_type_unit.
11139 For TUs we want to skip the first top level sibling if it's not the
11140 actual type being defined by this TU. In this case the first top
11141 level sibling is there to provide context only. */
11144 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11146 struct die_info
*child_die
;
11148 prepare_one_comp_unit (cu
, die
, language_minimal
);
11150 /* Initialize (or reinitialize) the machinery for building symtabs.
11151 We do this before processing child DIEs, so that the line header table
11152 is available for DW_AT_decl_file. */
11153 cu
->setup_type_unit_groups (die
);
11155 if (die
->child
!= NULL
)
11157 child_die
= die
->child
;
11158 while (child_die
&& child_die
->tag
)
11160 process_die (child_die
, cu
);
11161 child_die
= child_die
->sibling
;
11168 http://gcc.gnu.org/wiki/DebugFission
11169 http://gcc.gnu.org/wiki/DebugFissionDWP
11171 To simplify handling of both DWO files ("object" files with the DWARF info)
11172 and DWP files (a file with the DWOs packaged up into one file), we treat
11173 DWP files as having a collection of virtual DWO files. */
11176 hash_dwo_file (const void *item
)
11178 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11181 hash
= htab_hash_string (dwo_file
->dwo_name
);
11182 if (dwo_file
->comp_dir
!= NULL
)
11183 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11188 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11190 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11191 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11193 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11195 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11196 return lhs
->comp_dir
== rhs
->comp_dir
;
11197 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11200 /* Allocate a hash table for DWO files. */
11203 allocate_dwo_file_hash_table ()
11205 auto delete_dwo_file
= [] (void *item
)
11207 struct dwo_file
*dwo_file
= (struct dwo_file
*) item
;
11212 return htab_up (htab_create_alloc (41,
11219 /* Lookup DWO file DWO_NAME. */
11222 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11223 const char *dwo_name
,
11224 const char *comp_dir
)
11226 struct dwo_file find_entry
;
11229 if (dwarf2_per_objfile
->per_bfd
->dwo_files
== NULL
)
11230 dwarf2_per_objfile
->per_bfd
->dwo_files
= allocate_dwo_file_hash_table ();
11232 find_entry
.dwo_name
= dwo_name
;
11233 find_entry
.comp_dir
= comp_dir
;
11234 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->dwo_files
.get (), &find_entry
,
11241 hash_dwo_unit (const void *item
)
11243 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11245 /* This drops the top 32 bits of the id, but is ok for a hash. */
11246 return dwo_unit
->signature
;
11250 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11252 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11253 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11255 /* The signature is assumed to be unique within the DWO file.
11256 So while object file CU dwo_id's always have the value zero,
11257 that's OK, assuming each object file DWO file has only one CU,
11258 and that's the rule for now. */
11259 return lhs
->signature
== rhs
->signature
;
11262 /* Allocate a hash table for DWO CUs,TUs.
11263 There is one of these tables for each of CUs,TUs for each DWO file. */
11266 allocate_dwo_unit_table ()
11268 /* Start out with a pretty small number.
11269 Generally DWO files contain only one CU and maybe some TUs. */
11270 return htab_up (htab_create_alloc (3,
11273 NULL
, xcalloc
, xfree
));
11276 /* die_reader_func for create_dwo_cu. */
11279 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11280 const gdb_byte
*info_ptr
,
11281 struct die_info
*comp_unit_die
,
11282 struct dwo_file
*dwo_file
,
11283 struct dwo_unit
*dwo_unit
)
11285 struct dwarf2_cu
*cu
= reader
->cu
;
11286 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11287 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11289 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
11290 if (!signature
.has_value ())
11292 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11293 " its dwo_id [in module %s]"),
11294 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11298 dwo_unit
->dwo_file
= dwo_file
;
11299 dwo_unit
->signature
= *signature
;
11300 dwo_unit
->section
= section
;
11301 dwo_unit
->sect_off
= sect_off
;
11302 dwo_unit
->length
= cu
->per_cu
->length
;
11304 if (dwarf_read_debug
)
11305 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11306 sect_offset_str (sect_off
),
11307 hex_string (dwo_unit
->signature
));
11310 /* Create the dwo_units for the CUs in a DWO_FILE.
11311 Note: This function processes DWO files only, not DWP files. */
11314 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11315 dwarf2_cu
*cu
, struct dwo_file
&dwo_file
,
11316 dwarf2_section_info
§ion
, htab_up
&cus_htab
)
11318 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11319 dwarf2_per_bfd
*per_bfd
= dwarf2_per_objfile
->per_bfd
;
11320 const gdb_byte
*info_ptr
, *end_ptr
;
11322 section
.read (objfile
);
11323 info_ptr
= section
.buffer
;
11325 if (info_ptr
== NULL
)
11328 if (dwarf_read_debug
)
11330 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11331 section
.get_name (),
11332 section
.get_file_name ());
11335 end_ptr
= info_ptr
+ section
.size
;
11336 while (info_ptr
< end_ptr
)
11338 struct dwarf2_per_cu_data per_cu
;
11339 struct dwo_unit read_unit
{};
11340 struct dwo_unit
*dwo_unit
;
11342 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11344 memset (&per_cu
, 0, sizeof (per_cu
));
11345 per_cu
.per_bfd
= per_bfd
;
11346 per_cu
.is_debug_types
= 0;
11347 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11348 per_cu
.section
= §ion
;
11350 cutu_reader
reader (&per_cu
, dwarf2_per_objfile
, cu
, &dwo_file
);
11351 if (!reader
.dummy_p
)
11352 create_dwo_cu_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
,
11353 &dwo_file
, &read_unit
);
11354 info_ptr
+= per_cu
.length
;
11356 // If the unit could not be parsed, skip it.
11357 if (read_unit
.dwo_file
== NULL
)
11360 if (cus_htab
== NULL
)
11361 cus_htab
= allocate_dwo_unit_table ();
11363 dwo_unit
= OBSTACK_ZALLOC (&per_bfd
->obstack
,
11365 *dwo_unit
= read_unit
;
11366 slot
= htab_find_slot (cus_htab
.get (), dwo_unit
, INSERT
);
11367 gdb_assert (slot
!= NULL
);
11370 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11371 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11373 complaint (_("debug cu entry at offset %s is duplicate to"
11374 " the entry at offset %s, signature %s"),
11375 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11376 hex_string (dwo_unit
->signature
));
11378 *slot
= (void *)dwo_unit
;
11382 /* DWP file .debug_{cu,tu}_index section format:
11383 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11387 Both index sections have the same format, and serve to map a 64-bit
11388 signature to a set of section numbers. Each section begins with a header,
11389 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11390 indexes, and a pool of 32-bit section numbers. The index sections will be
11391 aligned at 8-byte boundaries in the file.
11393 The index section header consists of:
11395 V, 32 bit version number
11397 N, 32 bit number of compilation units or type units in the index
11398 M, 32 bit number of slots in the hash table
11400 Numbers are recorded using the byte order of the application binary.
11402 The hash table begins at offset 16 in the section, and consists of an array
11403 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11404 order of the application binary). Unused slots in the hash table are 0.
11405 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11407 The parallel table begins immediately after the hash table
11408 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11409 array of 32-bit indexes (using the byte order of the application binary),
11410 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11411 table contains a 32-bit index into the pool of section numbers. For unused
11412 hash table slots, the corresponding entry in the parallel table will be 0.
11414 The pool of section numbers begins immediately following the hash table
11415 (at offset 16 + 12 * M from the beginning of the section). The pool of
11416 section numbers consists of an array of 32-bit words (using the byte order
11417 of the application binary). Each item in the array is indexed starting
11418 from 0. The hash table entry provides the index of the first section
11419 number in the set. Additional section numbers in the set follow, and the
11420 set is terminated by a 0 entry (section number 0 is not used in ELF).
11422 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11423 section must be the first entry in the set, and the .debug_abbrev.dwo must
11424 be the second entry. Other members of the set may follow in any order.
11430 DWP Version 2 combines all the .debug_info, etc. sections into one,
11431 and the entries in the index tables are now offsets into these sections.
11432 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11435 Index Section Contents:
11437 Hash Table of Signatures dwp_hash_table.hash_table
11438 Parallel Table of Indices dwp_hash_table.unit_table
11439 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
11440 Table of Section Sizes dwp_hash_table.v2.sizes
11442 The index section header consists of:
11444 V, 32 bit version number
11445 L, 32 bit number of columns in the table of section offsets
11446 N, 32 bit number of compilation units or type units in the index
11447 M, 32 bit number of slots in the hash table
11449 Numbers are recorded using the byte order of the application binary.
11451 The hash table has the same format as version 1.
11452 The parallel table of indices has the same format as version 1,
11453 except that the entries are origin-1 indices into the table of sections
11454 offsets and the table of section sizes.
11456 The table of offsets begins immediately following the parallel table
11457 (at offset 16 + 12 * M from the beginning of the section). The table is
11458 a two-dimensional array of 32-bit words (using the byte order of the
11459 application binary), with L columns and N+1 rows, in row-major order.
11460 Each row in the array is indexed starting from 0. The first row provides
11461 a key to the remaining rows: each column in this row provides an identifier
11462 for a debug section, and the offsets in the same column of subsequent rows
11463 refer to that section. The section identifiers are:
11465 DW_SECT_INFO 1 .debug_info.dwo
11466 DW_SECT_TYPES 2 .debug_types.dwo
11467 DW_SECT_ABBREV 3 .debug_abbrev.dwo
11468 DW_SECT_LINE 4 .debug_line.dwo
11469 DW_SECT_LOC 5 .debug_loc.dwo
11470 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
11471 DW_SECT_MACINFO 7 .debug_macinfo.dwo
11472 DW_SECT_MACRO 8 .debug_macro.dwo
11474 The offsets provided by the CU and TU index sections are the base offsets
11475 for the contributions made by each CU or TU to the corresponding section
11476 in the package file. Each CU and TU header contains an abbrev_offset
11477 field, used to find the abbreviations table for that CU or TU within the
11478 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
11479 be interpreted as relative to the base offset given in the index section.
11480 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
11481 should be interpreted as relative to the base offset for .debug_line.dwo,
11482 and offsets into other debug sections obtained from DWARF attributes should
11483 also be interpreted as relative to the corresponding base offset.
11485 The table of sizes begins immediately following the table of offsets.
11486 Like the table of offsets, it is a two-dimensional array of 32-bit words,
11487 with L columns and N rows, in row-major order. Each row in the array is
11488 indexed starting from 1 (row 0 is shared by the two tables).
11492 Hash table lookup is handled the same in version 1 and 2:
11494 We assume that N and M will not exceed 2^32 - 1.
11495 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
11497 Given a 64-bit compilation unit signature or a type signature S, an entry
11498 in the hash table is located as follows:
11500 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
11501 the low-order k bits all set to 1.
11503 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
11505 3) If the hash table entry at index H matches the signature, use that
11506 entry. If the hash table entry at index H is unused (all zeroes),
11507 terminate the search: the signature is not present in the table.
11509 4) Let H = (H + H') modulo M. Repeat at Step 3.
11511 Because M > N and H' and M are relatively prime, the search is guaranteed
11512 to stop at an unused slot or find the match. */
11514 /* Create a hash table to map DWO IDs to their CU/TU entry in
11515 .debug_{info,types}.dwo in DWP_FILE.
11516 Returns NULL if there isn't one.
11517 Note: This function processes DWP files only, not DWO files. */
11519 static struct dwp_hash_table
*
11520 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11521 struct dwp_file
*dwp_file
, int is_debug_types
)
11523 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11524 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11525 const gdb_byte
*index_ptr
, *index_end
;
11526 struct dwarf2_section_info
*index
;
11527 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
11528 struct dwp_hash_table
*htab
;
11530 if (is_debug_types
)
11531 index
= &dwp_file
->sections
.tu_index
;
11533 index
= &dwp_file
->sections
.cu_index
;
11535 if (index
->empty ())
11537 index
->read (objfile
);
11539 index_ptr
= index
->buffer
;
11540 index_end
= index_ptr
+ index
->size
;
11542 version
= read_4_bytes (dbfd
, index_ptr
);
11545 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
11549 nr_units
= read_4_bytes (dbfd
, index_ptr
);
11551 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
11554 if (version
!= 1 && version
!= 2)
11556 error (_("Dwarf Error: unsupported DWP file version (%s)"
11557 " [in module %s]"),
11558 pulongest (version
), dwp_file
->name
);
11560 if (nr_slots
!= (nr_slots
& -nr_slots
))
11562 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
11563 " is not power of 2 [in module %s]"),
11564 pulongest (nr_slots
), dwp_file
->name
);
11567 htab
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
, struct dwp_hash_table
);
11568 htab
->version
= version
;
11569 htab
->nr_columns
= nr_columns
;
11570 htab
->nr_units
= nr_units
;
11571 htab
->nr_slots
= nr_slots
;
11572 htab
->hash_table
= index_ptr
;
11573 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
11575 /* Exit early if the table is empty. */
11576 if (nr_slots
== 0 || nr_units
== 0
11577 || (version
== 2 && nr_columns
== 0))
11579 /* All must be zero. */
11580 if (nr_slots
!= 0 || nr_units
!= 0
11581 || (version
== 2 && nr_columns
!= 0))
11583 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
11584 " all zero [in modules %s]"),
11592 htab
->section_pool
.v1
.indices
=
11593 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11594 /* It's harder to decide whether the section is too small in v1.
11595 V1 is deprecated anyway so we punt. */
11599 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11600 int *ids
= htab
->section_pool
.v2
.section_ids
;
11601 size_t sizeof_ids
= sizeof (htab
->section_pool
.v2
.section_ids
);
11602 /* Reverse map for error checking. */
11603 int ids_seen
[DW_SECT_MAX
+ 1];
11606 if (nr_columns
< 2)
11608 error (_("Dwarf Error: bad DWP hash table, too few columns"
11609 " in section table [in module %s]"),
11612 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
11614 error (_("Dwarf Error: bad DWP hash table, too many columns"
11615 " in section table [in module %s]"),
11618 memset (ids
, 255, sizeof_ids
);
11619 memset (ids_seen
, 255, sizeof (ids_seen
));
11620 for (i
= 0; i
< nr_columns
; ++i
)
11622 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
11624 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
11626 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
11627 " in section table [in module %s]"),
11628 id
, dwp_file
->name
);
11630 if (ids_seen
[id
] != -1)
11632 error (_("Dwarf Error: bad DWP hash table, duplicate section"
11633 " id %d in section table [in module %s]"),
11634 id
, dwp_file
->name
);
11639 /* Must have exactly one info or types section. */
11640 if (((ids_seen
[DW_SECT_INFO
] != -1)
11641 + (ids_seen
[DW_SECT_TYPES
] != -1))
11644 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
11645 " DWO info/types section [in module %s]"),
11648 /* Must have an abbrev section. */
11649 if (ids_seen
[DW_SECT_ABBREV
] == -1)
11651 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
11652 " section [in module %s]"),
11655 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
11656 htab
->section_pool
.v2
.sizes
=
11657 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
11658 * nr_units
* nr_columns
);
11659 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
11660 * nr_units
* nr_columns
))
11663 error (_("Dwarf Error: DWP index section is corrupt (too small)"
11664 " [in module %s]"),
11672 /* Update SECTIONS with the data from SECTP.
11674 This function is like the other "locate" section routines that are
11675 passed to bfd_map_over_sections, but in this context the sections to
11676 read comes from the DWP V1 hash table, not the full ELF section table.
11678 The result is non-zero for success, or zero if an error was found. */
11681 locate_v1_virtual_dwo_sections (asection
*sectp
,
11682 struct virtual_v1_dwo_sections
*sections
)
11684 const struct dwop_section_names
*names
= &dwop_section_names
;
11686 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
11688 /* There can be only one. */
11689 if (sections
->abbrev
.s
.section
!= NULL
)
11691 sections
->abbrev
.s
.section
= sectp
;
11692 sections
->abbrev
.size
= bfd_section_size (sectp
);
11694 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
11695 || section_is_p (sectp
->name
, &names
->types_dwo
))
11697 /* There can be only one. */
11698 if (sections
->info_or_types
.s
.section
!= NULL
)
11700 sections
->info_or_types
.s
.section
= sectp
;
11701 sections
->info_or_types
.size
= bfd_section_size (sectp
);
11703 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11705 /* There can be only one. */
11706 if (sections
->line
.s
.section
!= NULL
)
11708 sections
->line
.s
.section
= sectp
;
11709 sections
->line
.size
= bfd_section_size (sectp
);
11711 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11713 /* There can be only one. */
11714 if (sections
->loc
.s
.section
!= NULL
)
11716 sections
->loc
.s
.section
= sectp
;
11717 sections
->loc
.size
= bfd_section_size (sectp
);
11719 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11721 /* There can be only one. */
11722 if (sections
->macinfo
.s
.section
!= NULL
)
11724 sections
->macinfo
.s
.section
= sectp
;
11725 sections
->macinfo
.size
= bfd_section_size (sectp
);
11727 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11729 /* There can be only one. */
11730 if (sections
->macro
.s
.section
!= NULL
)
11732 sections
->macro
.s
.section
= sectp
;
11733 sections
->macro
.size
= bfd_section_size (sectp
);
11735 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11737 /* There can be only one. */
11738 if (sections
->str_offsets
.s
.section
!= NULL
)
11740 sections
->str_offsets
.s
.section
= sectp
;
11741 sections
->str_offsets
.size
= bfd_section_size (sectp
);
11745 /* No other kind of section is valid. */
11752 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11753 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11754 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11755 This is for DWP version 1 files. */
11757 static struct dwo_unit
*
11758 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11759 struct dwp_file
*dwp_file
,
11760 uint32_t unit_index
,
11761 const char *comp_dir
,
11762 ULONGEST signature
, int is_debug_types
)
11764 const struct dwp_hash_table
*dwp_htab
=
11765 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11766 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11767 const char *kind
= is_debug_types
? "TU" : "CU";
11768 struct dwo_file
*dwo_file
;
11769 struct dwo_unit
*dwo_unit
;
11770 struct virtual_v1_dwo_sections sections
;
11771 void **dwo_file_slot
;
11774 gdb_assert (dwp_file
->version
== 1);
11776 if (dwarf_read_debug
)
11778 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
11780 pulongest (unit_index
), hex_string (signature
),
11784 /* Fetch the sections of this DWO unit.
11785 Put a limit on the number of sections we look for so that bad data
11786 doesn't cause us to loop forever. */
11788 #define MAX_NR_V1_DWO_SECTIONS \
11789 (1 /* .debug_info or .debug_types */ \
11790 + 1 /* .debug_abbrev */ \
11791 + 1 /* .debug_line */ \
11792 + 1 /* .debug_loc */ \
11793 + 1 /* .debug_str_offsets */ \
11794 + 1 /* .debug_macro or .debug_macinfo */ \
11795 + 1 /* trailing zero */)
11797 memset (§ions
, 0, sizeof (sections
));
11799 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
11802 uint32_t section_nr
=
11803 read_4_bytes (dbfd
,
11804 dwp_htab
->section_pool
.v1
.indices
11805 + (unit_index
+ i
) * sizeof (uint32_t));
11807 if (section_nr
== 0)
11809 if (section_nr
>= dwp_file
->num_sections
)
11811 error (_("Dwarf Error: bad DWP hash table, section number too large"
11812 " [in module %s]"),
11816 sectp
= dwp_file
->elf_sections
[section_nr
];
11817 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
11819 error (_("Dwarf Error: bad DWP hash table, invalid section found"
11820 " [in module %s]"),
11826 || sections
.info_or_types
.empty ()
11827 || sections
.abbrev
.empty ())
11829 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
11830 " [in module %s]"),
11833 if (i
== MAX_NR_V1_DWO_SECTIONS
)
11835 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
11836 " [in module %s]"),
11840 /* It's easier for the rest of the code if we fake a struct dwo_file and
11841 have dwo_unit "live" in that. At least for now.
11843 The DWP file can be made up of a random collection of CUs and TUs.
11844 However, for each CU + set of TUs that came from the same original DWO
11845 file, we can combine them back into a virtual DWO file to save space
11846 (fewer struct dwo_file objects to allocate). Remember that for really
11847 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
11849 std::string virtual_dwo_name
=
11850 string_printf ("virtual-dwo/%d-%d-%d-%d",
11851 sections
.abbrev
.get_id (),
11852 sections
.line
.get_id (),
11853 sections
.loc
.get_id (),
11854 sections
.str_offsets
.get_id ());
11855 /* Can we use an existing virtual DWO file? */
11856 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
11857 virtual_dwo_name
.c_str (),
11859 /* Create one if necessary. */
11860 if (*dwo_file_slot
== NULL
)
11862 if (dwarf_read_debug
)
11864 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11865 virtual_dwo_name
.c_str ());
11867 dwo_file
= new struct dwo_file
;
11868 dwo_file
->dwo_name
= dwarf2_per_objfile
->objfile
->intern (virtual_dwo_name
);
11869 dwo_file
->comp_dir
= comp_dir
;
11870 dwo_file
->sections
.abbrev
= sections
.abbrev
;
11871 dwo_file
->sections
.line
= sections
.line
;
11872 dwo_file
->sections
.loc
= sections
.loc
;
11873 dwo_file
->sections
.macinfo
= sections
.macinfo
;
11874 dwo_file
->sections
.macro
= sections
.macro
;
11875 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
11876 /* The "str" section is global to the entire DWP file. */
11877 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
11878 /* The info or types section is assigned below to dwo_unit,
11879 there's no need to record it in dwo_file.
11880 Also, we can't simply record type sections in dwo_file because
11881 we record a pointer into the vector in dwo_unit. As we collect more
11882 types we'll grow the vector and eventually have to reallocate space
11883 for it, invalidating all copies of pointers into the previous
11885 *dwo_file_slot
= dwo_file
;
11889 if (dwarf_read_debug
)
11891 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
11892 virtual_dwo_name
.c_str ());
11894 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11897 dwo_unit
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
, struct dwo_unit
);
11898 dwo_unit
->dwo_file
= dwo_file
;
11899 dwo_unit
->signature
= signature
;
11900 dwo_unit
->section
=
11901 XOBNEW (&dwarf2_per_objfile
->per_bfd
->obstack
, struct dwarf2_section_info
);
11902 *dwo_unit
->section
= sections
.info_or_types
;
11903 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
11908 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
11909 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
11910 piece within that section used by a TU/CU, return a virtual section
11911 of just that piece. */
11913 static struct dwarf2_section_info
11914 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11915 struct dwarf2_section_info
*section
,
11916 bfd_size_type offset
, bfd_size_type size
)
11918 struct dwarf2_section_info result
;
11921 gdb_assert (section
!= NULL
);
11922 gdb_assert (!section
->is_virtual
);
11924 memset (&result
, 0, sizeof (result
));
11925 result
.s
.containing_section
= section
;
11926 result
.is_virtual
= true;
11931 sectp
= section
->get_bfd_section ();
11933 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
11934 bounds of the real section. This is a pretty-rare event, so just
11935 flag an error (easier) instead of a warning and trying to cope. */
11937 || offset
+ size
> bfd_section_size (sectp
))
11939 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
11940 " in section %s [in module %s]"),
11941 sectp
? bfd_section_name (sectp
) : "<unknown>",
11942 objfile_name (dwarf2_per_objfile
->objfile
));
11945 result
.virtual_offset
= offset
;
11946 result
.size
= size
;
11950 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11951 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11952 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11953 This is for DWP version 2 files. */
11955 static struct dwo_unit
*
11956 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11957 struct dwp_file
*dwp_file
,
11958 uint32_t unit_index
,
11959 const char *comp_dir
,
11960 ULONGEST signature
, int is_debug_types
)
11962 const struct dwp_hash_table
*dwp_htab
=
11963 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11964 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11965 const char *kind
= is_debug_types
? "TU" : "CU";
11966 struct dwo_file
*dwo_file
;
11967 struct dwo_unit
*dwo_unit
;
11968 struct virtual_v2_dwo_sections sections
;
11969 void **dwo_file_slot
;
11972 gdb_assert (dwp_file
->version
== 2);
11974 if (dwarf_read_debug
)
11976 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
11978 pulongest (unit_index
), hex_string (signature
),
11982 /* Fetch the section offsets of this DWO unit. */
11984 memset (§ions
, 0, sizeof (sections
));
11986 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
11988 uint32_t offset
= read_4_bytes (dbfd
,
11989 dwp_htab
->section_pool
.v2
.offsets
11990 + (((unit_index
- 1) * dwp_htab
->nr_columns
11992 * sizeof (uint32_t)));
11993 uint32_t size
= read_4_bytes (dbfd
,
11994 dwp_htab
->section_pool
.v2
.sizes
11995 + (((unit_index
- 1) * dwp_htab
->nr_columns
11997 * sizeof (uint32_t)));
11999 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12002 case DW_SECT_TYPES
:
12003 sections
.info_or_types_offset
= offset
;
12004 sections
.info_or_types_size
= size
;
12006 case DW_SECT_ABBREV
:
12007 sections
.abbrev_offset
= offset
;
12008 sections
.abbrev_size
= size
;
12011 sections
.line_offset
= offset
;
12012 sections
.line_size
= size
;
12015 sections
.loc_offset
= offset
;
12016 sections
.loc_size
= size
;
12018 case DW_SECT_STR_OFFSETS
:
12019 sections
.str_offsets_offset
= offset
;
12020 sections
.str_offsets_size
= size
;
12022 case DW_SECT_MACINFO
:
12023 sections
.macinfo_offset
= offset
;
12024 sections
.macinfo_size
= size
;
12026 case DW_SECT_MACRO
:
12027 sections
.macro_offset
= offset
;
12028 sections
.macro_size
= size
;
12033 /* It's easier for the rest of the code if we fake a struct dwo_file and
12034 have dwo_unit "live" in that. At least for now.
12036 The DWP file can be made up of a random collection of CUs and TUs.
12037 However, for each CU + set of TUs that came from the same original DWO
12038 file, we can combine them back into a virtual DWO file to save space
12039 (fewer struct dwo_file objects to allocate). Remember that for really
12040 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12042 std::string virtual_dwo_name
=
12043 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12044 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12045 (long) (sections
.line_size
? sections
.line_offset
: 0),
12046 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12047 (long) (sections
.str_offsets_size
12048 ? sections
.str_offsets_offset
: 0));
12049 /* Can we use an existing virtual DWO file? */
12050 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12051 virtual_dwo_name
.c_str (),
12053 /* Create one if necessary. */
12054 if (*dwo_file_slot
== NULL
)
12056 if (dwarf_read_debug
)
12058 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12059 virtual_dwo_name
.c_str ());
12061 dwo_file
= new struct dwo_file
;
12062 dwo_file
->dwo_name
= dwarf2_per_objfile
->objfile
->intern (virtual_dwo_name
);
12063 dwo_file
->comp_dir
= comp_dir
;
12064 dwo_file
->sections
.abbrev
=
12065 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
12066 sections
.abbrev_offset
, sections
.abbrev_size
);
12067 dwo_file
->sections
.line
=
12068 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
12069 sections
.line_offset
, sections
.line_size
);
12070 dwo_file
->sections
.loc
=
12071 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12072 sections
.loc_offset
, sections
.loc_size
);
12073 dwo_file
->sections
.macinfo
=
12074 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12075 sections
.macinfo_offset
, sections
.macinfo_size
);
12076 dwo_file
->sections
.macro
=
12077 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12078 sections
.macro_offset
, sections
.macro_size
);
12079 dwo_file
->sections
.str_offsets
=
12080 create_dwp_v2_section (dwarf2_per_objfile
,
12081 &dwp_file
->sections
.str_offsets
,
12082 sections
.str_offsets_offset
,
12083 sections
.str_offsets_size
);
12084 /* The "str" section is global to the entire DWP file. */
12085 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12086 /* The info or types section is assigned below to dwo_unit,
12087 there's no need to record it in dwo_file.
12088 Also, we can't simply record type sections in dwo_file because
12089 we record a pointer into the vector in dwo_unit. As we collect more
12090 types we'll grow the vector and eventually have to reallocate space
12091 for it, invalidating all copies of pointers into the previous
12093 *dwo_file_slot
= dwo_file
;
12097 if (dwarf_read_debug
)
12099 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12100 virtual_dwo_name
.c_str ());
12102 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12105 dwo_unit
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
, struct dwo_unit
);
12106 dwo_unit
->dwo_file
= dwo_file
;
12107 dwo_unit
->signature
= signature
;
12108 dwo_unit
->section
=
12109 XOBNEW (&dwarf2_per_objfile
->per_bfd
->obstack
, struct dwarf2_section_info
);
12110 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12112 ? &dwp_file
->sections
.types
12113 : &dwp_file
->sections
.info
,
12114 sections
.info_or_types_offset
,
12115 sections
.info_or_types_size
);
12116 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12121 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12122 Returns NULL if the signature isn't found. */
12124 static struct dwo_unit
*
12125 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12126 struct dwp_file
*dwp_file
, const char *comp_dir
,
12127 ULONGEST signature
, int is_debug_types
)
12129 const struct dwp_hash_table
*dwp_htab
=
12130 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12131 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12132 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12133 uint32_t hash
= signature
& mask
;
12134 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12137 struct dwo_unit find_dwo_cu
;
12139 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12140 find_dwo_cu
.signature
= signature
;
12141 slot
= htab_find_slot (is_debug_types
12142 ? dwp_file
->loaded_tus
.get ()
12143 : dwp_file
->loaded_cus
.get (),
12144 &find_dwo_cu
, INSERT
);
12147 return (struct dwo_unit
*) *slot
;
12149 /* Use a for loop so that we don't loop forever on bad debug info. */
12150 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12152 ULONGEST signature_in_table
;
12154 signature_in_table
=
12155 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12156 if (signature_in_table
== signature
)
12158 uint32_t unit_index
=
12159 read_4_bytes (dbfd
,
12160 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12162 if (dwp_file
->version
== 1)
12164 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12165 dwp_file
, unit_index
,
12166 comp_dir
, signature
,
12171 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12172 dwp_file
, unit_index
,
12173 comp_dir
, signature
,
12176 return (struct dwo_unit
*) *slot
;
12178 if (signature_in_table
== 0)
12180 hash
= (hash
+ hash2
) & mask
;
12183 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12184 " [in module %s]"),
12188 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12189 Open the file specified by FILE_NAME and hand it off to BFD for
12190 preliminary analysis. Return a newly initialized bfd *, which
12191 includes a canonicalized copy of FILE_NAME.
12192 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12193 SEARCH_CWD is true if the current directory is to be searched.
12194 It will be searched before debug-file-directory.
12195 If successful, the file is added to the bfd include table of the
12196 objfile's bfd (see gdb_bfd_record_inclusion).
12197 If unable to find/open the file, return NULL.
12198 NOTE: This function is derived from symfile_bfd_open. */
12200 static gdb_bfd_ref_ptr
12201 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12202 const char *file_name
, int is_dwp
, int search_cwd
)
12205 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12206 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12207 to debug_file_directory. */
12208 const char *search_path
;
12209 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12211 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12214 if (*debug_file_directory
!= '\0')
12216 search_path_holder
.reset (concat (".", dirname_separator_string
,
12217 debug_file_directory
,
12219 search_path
= search_path_holder
.get ();
12225 search_path
= debug_file_directory
;
12227 openp_flags flags
= OPF_RETURN_REALPATH
;
12229 flags
|= OPF_SEARCH_IN_PATH
;
12231 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12232 desc
= openp (search_path
, flags
, file_name
,
12233 O_RDONLY
| O_BINARY
, &absolute_name
);
12237 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12239 if (sym_bfd
== NULL
)
12241 bfd_set_cacheable (sym_bfd
.get (), 1);
12243 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12246 /* Success. Record the bfd as having been included by the objfile's bfd.
12247 This is important because things like demangled_names_hash lives in the
12248 objfile's per_bfd space and may have references to things like symbol
12249 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12250 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12255 /* Try to open DWO file FILE_NAME.
12256 COMP_DIR is the DW_AT_comp_dir attribute.
12257 The result is the bfd handle of the file.
12258 If there is a problem finding or opening the file, return NULL.
12259 Upon success, the canonicalized path of the file is stored in the bfd,
12260 same as symfile_bfd_open. */
12262 static gdb_bfd_ref_ptr
12263 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12264 const char *file_name
, const char *comp_dir
)
12266 if (IS_ABSOLUTE_PATH (file_name
))
12267 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12268 0 /*is_dwp*/, 0 /*search_cwd*/);
12270 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12272 if (comp_dir
!= NULL
)
12274 gdb::unique_xmalloc_ptr
<char> path_to_try
12275 (concat (comp_dir
, SLASH_STRING
, file_name
, (char *) NULL
));
12277 /* NOTE: If comp_dir is a relative path, this will also try the
12278 search path, which seems useful. */
12279 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12280 path_to_try
.get (),
12282 1 /*search_cwd*/));
12287 /* That didn't work, try debug-file-directory, which, despite its name,
12288 is a list of paths. */
12290 if (*debug_file_directory
== '\0')
12293 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12294 0 /*is_dwp*/, 1 /*search_cwd*/);
12297 /* This function is mapped across the sections and remembers the offset and
12298 size of each of the DWO debugging sections we are interested in. */
12301 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12303 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12304 const struct dwop_section_names
*names
= &dwop_section_names
;
12306 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12308 dwo_sections
->abbrev
.s
.section
= sectp
;
12309 dwo_sections
->abbrev
.size
= bfd_section_size (sectp
);
12311 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12313 dwo_sections
->info
.s
.section
= sectp
;
12314 dwo_sections
->info
.size
= bfd_section_size (sectp
);
12316 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12318 dwo_sections
->line
.s
.section
= sectp
;
12319 dwo_sections
->line
.size
= bfd_section_size (sectp
);
12321 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12323 dwo_sections
->loc
.s
.section
= sectp
;
12324 dwo_sections
->loc
.size
= bfd_section_size (sectp
);
12326 else if (section_is_p (sectp
->name
, &names
->loclists_dwo
))
12328 dwo_sections
->loclists
.s
.section
= sectp
;
12329 dwo_sections
->loclists
.size
= bfd_section_size (sectp
);
12331 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12333 dwo_sections
->macinfo
.s
.section
= sectp
;
12334 dwo_sections
->macinfo
.size
= bfd_section_size (sectp
);
12336 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12338 dwo_sections
->macro
.s
.section
= sectp
;
12339 dwo_sections
->macro
.size
= bfd_section_size (sectp
);
12341 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12343 dwo_sections
->str
.s
.section
= sectp
;
12344 dwo_sections
->str
.size
= bfd_section_size (sectp
);
12346 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12348 dwo_sections
->str_offsets
.s
.section
= sectp
;
12349 dwo_sections
->str_offsets
.size
= bfd_section_size (sectp
);
12351 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12353 struct dwarf2_section_info type_section
;
12355 memset (&type_section
, 0, sizeof (type_section
));
12356 type_section
.s
.section
= sectp
;
12357 type_section
.size
= bfd_section_size (sectp
);
12358 dwo_sections
->types
.push_back (type_section
);
12362 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12363 by PER_CU. This is for the non-DWP case.
12364 The result is NULL if DWO_NAME can't be found. */
12366 static struct dwo_file
*
12367 open_and_init_dwo_file (dwarf2_cu
*cu
, const char *dwo_name
,
12368 const char *comp_dir
)
12370 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
12372 gdb_bfd_ref_ptr dbfd
= open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
);
12375 if (dwarf_read_debug
)
12376 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12380 dwo_file_up
dwo_file (new struct dwo_file
);
12381 dwo_file
->dwo_name
= dwo_name
;
12382 dwo_file
->comp_dir
= comp_dir
;
12383 dwo_file
->dbfd
= std::move (dbfd
);
12385 bfd_map_over_sections (dwo_file
->dbfd
.get (), dwarf2_locate_dwo_sections
,
12386 &dwo_file
->sections
);
12388 create_cus_hash_table (dwarf2_per_objfile
, cu
, *dwo_file
,
12389 dwo_file
->sections
.info
, dwo_file
->cus
);
12391 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
12392 dwo_file
->sections
.types
, dwo_file
->tus
);
12394 if (dwarf_read_debug
)
12395 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
12397 return dwo_file
.release ();
12400 /* This function is mapped across the sections and remembers the offset and
12401 size of each of the DWP debugging sections common to version 1 and 2 that
12402 we are interested in. */
12405 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12406 void *dwp_file_ptr
)
12408 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12409 const struct dwop_section_names
*names
= &dwop_section_names
;
12410 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12412 /* Record the ELF section number for later lookup: this is what the
12413 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12414 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12415 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12417 /* Look for specific sections that we need. */
12418 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12420 dwp_file
->sections
.str
.s
.section
= sectp
;
12421 dwp_file
->sections
.str
.size
= bfd_section_size (sectp
);
12423 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12425 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12426 dwp_file
->sections
.cu_index
.size
= bfd_section_size (sectp
);
12428 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12430 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12431 dwp_file
->sections
.tu_index
.size
= bfd_section_size (sectp
);
12435 /* This function is mapped across the sections and remembers the offset and
12436 size of each of the DWP version 2 debugging sections that we are interested
12437 in. This is split into a separate function because we don't know if we
12438 have version 1 or 2 until we parse the cu_index/tu_index sections. */
12441 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12443 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12444 const struct dwop_section_names
*names
= &dwop_section_names
;
12445 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12447 /* Record the ELF section number for later lookup: this is what the
12448 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12449 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12450 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12452 /* Look for specific sections that we need. */
12453 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12455 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12456 dwp_file
->sections
.abbrev
.size
= bfd_section_size (sectp
);
12458 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12460 dwp_file
->sections
.info
.s
.section
= sectp
;
12461 dwp_file
->sections
.info
.size
= bfd_section_size (sectp
);
12463 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12465 dwp_file
->sections
.line
.s
.section
= sectp
;
12466 dwp_file
->sections
.line
.size
= bfd_section_size (sectp
);
12468 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12470 dwp_file
->sections
.loc
.s
.section
= sectp
;
12471 dwp_file
->sections
.loc
.size
= bfd_section_size (sectp
);
12473 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12475 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
12476 dwp_file
->sections
.macinfo
.size
= bfd_section_size (sectp
);
12478 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12480 dwp_file
->sections
.macro
.s
.section
= sectp
;
12481 dwp_file
->sections
.macro
.size
= bfd_section_size (sectp
);
12483 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12485 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
12486 dwp_file
->sections
.str_offsets
.size
= bfd_section_size (sectp
);
12488 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12490 dwp_file
->sections
.types
.s
.section
= sectp
;
12491 dwp_file
->sections
.types
.size
= bfd_section_size (sectp
);
12495 /* Hash function for dwp_file loaded CUs/TUs. */
12498 hash_dwp_loaded_cutus (const void *item
)
12500 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
12502 /* This drops the top 32 bits of the signature, but is ok for a hash. */
12503 return dwo_unit
->signature
;
12506 /* Equality function for dwp_file loaded CUs/TUs. */
12509 eq_dwp_loaded_cutus (const void *a
, const void *b
)
12511 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
12512 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
12514 return dua
->signature
== dub
->signature
;
12517 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
12520 allocate_dwp_loaded_cutus_table ()
12522 return htab_up (htab_create_alloc (3,
12523 hash_dwp_loaded_cutus
,
12524 eq_dwp_loaded_cutus
,
12525 NULL
, xcalloc
, xfree
));
12528 /* Try to open DWP file FILE_NAME.
12529 The result is the bfd handle of the file.
12530 If there is a problem finding or opening the file, return NULL.
12531 Upon success, the canonicalized path of the file is stored in the bfd,
12532 same as symfile_bfd_open. */
12534 static gdb_bfd_ref_ptr
12535 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12536 const char *file_name
)
12538 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12540 1 /*search_cwd*/));
12544 /* Work around upstream bug 15652.
12545 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
12546 [Whether that's a "bug" is debatable, but it is getting in our way.]
12547 We have no real idea where the dwp file is, because gdb's realpath-ing
12548 of the executable's path may have discarded the needed info.
12549 [IWBN if the dwp file name was recorded in the executable, akin to
12550 .gnu_debuglink, but that doesn't exist yet.]
12551 Strip the directory from FILE_NAME and search again. */
12552 if (*debug_file_directory
!= '\0')
12554 /* Don't implicitly search the current directory here.
12555 If the user wants to search "." to handle this case,
12556 it must be added to debug-file-directory. */
12557 return try_open_dwop_file (dwarf2_per_objfile
,
12558 lbasename (file_name
), 1 /*is_dwp*/,
12565 /* Initialize the use of the DWP file for the current objfile.
12566 By convention the name of the DWP file is ${objfile}.dwp.
12567 The result is NULL if it can't be found. */
12569 static std::unique_ptr
<struct dwp_file
>
12570 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12572 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12574 /* Try to find first .dwp for the binary file before any symbolic links
12577 /* If the objfile is a debug file, find the name of the real binary
12578 file and get the name of dwp file from there. */
12579 std::string dwp_name
;
12580 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
12582 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
12583 const char *backlink_basename
= lbasename (backlink
->original_name
);
12585 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
12588 dwp_name
= objfile
->original_name
;
12590 dwp_name
+= ".dwp";
12592 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
12594 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
12596 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
12597 dwp_name
= objfile_name (objfile
);
12598 dwp_name
+= ".dwp";
12599 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
12604 if (dwarf_read_debug
)
12605 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
12606 return std::unique_ptr
<dwp_file
> ();
12609 const char *name
= bfd_get_filename (dbfd
.get ());
12610 std::unique_ptr
<struct dwp_file
> dwp_file
12611 (new struct dwp_file (name
, std::move (dbfd
)));
12613 dwp_file
->num_sections
= elf_numsections (dwp_file
->dbfd
);
12614 dwp_file
->elf_sections
=
12615 OBSTACK_CALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
12616 dwp_file
->num_sections
, asection
*);
12618 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12619 dwarf2_locate_common_dwp_sections
,
12622 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12625 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12628 /* The DWP file version is stored in the hash table. Oh well. */
12629 if (dwp_file
->cus
&& dwp_file
->tus
12630 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
12632 /* Technically speaking, we should try to limp along, but this is
12633 pretty bizarre. We use pulongest here because that's the established
12634 portability solution (e.g, we cannot use %u for uint32_t). */
12635 error (_("Dwarf Error: DWP file CU version %s doesn't match"
12636 " TU version %s [in DWP file %s]"),
12637 pulongest (dwp_file
->cus
->version
),
12638 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
12642 dwp_file
->version
= dwp_file
->cus
->version
;
12643 else if (dwp_file
->tus
)
12644 dwp_file
->version
= dwp_file
->tus
->version
;
12646 dwp_file
->version
= 2;
12648 if (dwp_file
->version
== 2)
12649 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12650 dwarf2_locate_v2_dwp_sections
,
12653 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table ();
12654 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table ();
12656 if (dwarf_read_debug
)
12658 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
12659 fprintf_unfiltered (gdb_stdlog
,
12660 " %s CUs, %s TUs\n",
12661 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
12662 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
12668 /* Wrapper around open_and_init_dwp_file, only open it once. */
12670 static struct dwp_file
*
12671 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12673 if (! dwarf2_per_objfile
->per_bfd
->dwp_checked
)
12675 dwarf2_per_objfile
->per_bfd
->dwp_file
12676 = open_and_init_dwp_file (dwarf2_per_objfile
);
12677 dwarf2_per_objfile
->per_bfd
->dwp_checked
= 1;
12679 return dwarf2_per_objfile
->per_bfd
->dwp_file
.get ();
12682 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
12683 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
12684 or in the DWP file for the objfile, referenced by THIS_UNIT.
12685 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
12686 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
12688 This is called, for example, when wanting to read a variable with a
12689 complex location. Therefore we don't want to do file i/o for every call.
12690 Therefore we don't want to look for a DWO file on every call.
12691 Therefore we first see if we've already seen SIGNATURE in a DWP file,
12692 then we check if we've already seen DWO_NAME, and only THEN do we check
12695 The result is a pointer to the dwo_unit object or NULL if we didn't find it
12696 (dwo_id mismatch or couldn't find the DWO/DWP file). */
12698 static struct dwo_unit
*
12699 lookup_dwo_cutu (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
,
12700 ULONGEST signature
, int is_debug_types
)
12702 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
12703 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12704 const char *kind
= is_debug_types
? "TU" : "CU";
12705 void **dwo_file_slot
;
12706 struct dwo_file
*dwo_file
;
12707 struct dwp_file
*dwp_file
;
12709 /* First see if there's a DWP file.
12710 If we have a DWP file but didn't find the DWO inside it, don't
12711 look for the original DWO file. It makes gdb behave differently
12712 depending on whether one is debugging in the build tree. */
12714 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
12715 if (dwp_file
!= NULL
)
12717 const struct dwp_hash_table
*dwp_htab
=
12718 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12720 if (dwp_htab
!= NULL
)
12722 struct dwo_unit
*dwo_cutu
=
12723 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
12724 signature
, is_debug_types
);
12726 if (dwo_cutu
!= NULL
)
12728 if (dwarf_read_debug
)
12730 fprintf_unfiltered (gdb_stdlog
,
12731 "Virtual DWO %s %s found: @%s\n",
12732 kind
, hex_string (signature
),
12733 host_address_to_string (dwo_cutu
));
12741 /* No DWP file, look for the DWO file. */
12743 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12744 dwo_name
, comp_dir
);
12745 if (*dwo_file_slot
== NULL
)
12747 /* Read in the file and build a table of the CUs/TUs it contains. */
12748 *dwo_file_slot
= open_and_init_dwo_file (cu
, dwo_name
, comp_dir
);
12750 /* NOTE: This will be NULL if unable to open the file. */
12751 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12753 if (dwo_file
!= NULL
)
12755 struct dwo_unit
*dwo_cutu
= NULL
;
12757 if (is_debug_types
&& dwo_file
->tus
)
12759 struct dwo_unit find_dwo_cutu
;
12761 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12762 find_dwo_cutu
.signature
= signature
;
12764 = (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
12767 else if (!is_debug_types
&& dwo_file
->cus
)
12769 struct dwo_unit find_dwo_cutu
;
12771 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12772 find_dwo_cutu
.signature
= signature
;
12773 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
.get (),
12777 if (dwo_cutu
!= NULL
)
12779 if (dwarf_read_debug
)
12781 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
12782 kind
, dwo_name
, hex_string (signature
),
12783 host_address_to_string (dwo_cutu
));
12790 /* We didn't find it. This could mean a dwo_id mismatch, or
12791 someone deleted the DWO/DWP file, or the search path isn't set up
12792 correctly to find the file. */
12794 if (dwarf_read_debug
)
12796 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
12797 kind
, dwo_name
, hex_string (signature
));
12800 /* This is a warning and not a complaint because it can be caused by
12801 pilot error (e.g., user accidentally deleting the DWO). */
12803 /* Print the name of the DWP file if we looked there, helps the user
12804 better diagnose the problem. */
12805 std::string dwp_text
;
12807 if (dwp_file
!= NULL
)
12808 dwp_text
= string_printf (" [in DWP file %s]",
12809 lbasename (dwp_file
->name
));
12811 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
12812 " [in module %s]"),
12813 kind
, dwo_name
, hex_string (signature
), dwp_text
.c_str (), kind
,
12814 sect_offset_str (cu
->per_cu
->sect_off
), objfile_name (objfile
));
12819 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
12820 See lookup_dwo_cutu_unit for details. */
12822 static struct dwo_unit
*
12823 lookup_dwo_comp_unit (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
,
12824 ULONGEST signature
)
12826 gdb_assert (!cu
->per_cu
->is_debug_types
);
12828 return lookup_dwo_cutu (cu
, dwo_name
, comp_dir
, signature
, 0);
12831 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
12832 See lookup_dwo_cutu_unit for details. */
12834 static struct dwo_unit
*
12835 lookup_dwo_type_unit (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
)
12837 gdb_assert (cu
->per_cu
->is_debug_types
);
12839 signatured_type
*sig_type
= (signatured_type
*) cu
->per_cu
;
12841 return lookup_dwo_cutu (cu
, dwo_name
, comp_dir
, sig_type
->signature
, 1);
12844 /* Traversal function for queue_and_load_all_dwo_tus. */
12847 queue_and_load_dwo_tu (void **slot
, void *info
)
12849 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
12850 dwarf2_cu
*cu
= (dwarf2_cu
*) info
;
12851 ULONGEST signature
= dwo_unit
->signature
;
12852 signatured_type
*sig_type
= lookup_dwo_signatured_type (cu
, signature
);
12854 if (sig_type
!= NULL
)
12856 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
12858 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
12859 a real dependency of PER_CU on SIG_TYPE. That is detected later
12860 while processing PER_CU. */
12861 if (maybe_queue_comp_unit (NULL
, sig_cu
, cu
->per_objfile
, cu
->language
))
12862 load_full_type_unit (sig_cu
, cu
->per_objfile
);
12863 cu
->per_cu
->imported_symtabs_push (sig_cu
);
12869 /* Queue all TUs contained in the DWO of PER_CU to be read in.
12870 The DWO may have the only definition of the type, though it may not be
12871 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
12872 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
12875 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
12877 struct dwo_unit
*dwo_unit
;
12878 struct dwo_file
*dwo_file
;
12880 gdb_assert (!per_cu
->is_debug_types
);
12881 gdb_assert (per_cu
->cu
!= NULL
);
12882 gdb_assert (get_dwp_file (per_cu
->cu
->per_objfile
) == NULL
);
12884 dwo_unit
= per_cu
->cu
->dwo_unit
;
12885 gdb_assert (dwo_unit
!= NULL
);
12887 dwo_file
= dwo_unit
->dwo_file
;
12888 if (dwo_file
->tus
!= NULL
)
12889 htab_traverse_noresize (dwo_file
->tus
.get (), queue_and_load_dwo_tu
,
12893 /* Read in various DIEs. */
12895 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
12896 Inherit only the children of the DW_AT_abstract_origin DIE not being
12897 already referenced by DW_AT_abstract_origin from the children of the
12901 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
12903 struct die_info
*child_die
;
12904 sect_offset
*offsetp
;
12905 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
12906 struct die_info
*origin_die
;
12907 /* Iterator of the ORIGIN_DIE children. */
12908 struct die_info
*origin_child_die
;
12909 struct attribute
*attr
;
12910 struct dwarf2_cu
*origin_cu
;
12911 struct pending
**origin_previous_list_in_scope
;
12913 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
12917 /* Note that following die references may follow to a die in a
12921 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
12923 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
12925 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
12926 origin_cu
->list_in_scope
= cu
->list_in_scope
;
12928 if (die
->tag
!= origin_die
->tag
12929 && !(die
->tag
== DW_TAG_inlined_subroutine
12930 && origin_die
->tag
== DW_TAG_subprogram
))
12931 complaint (_("DIE %s and its abstract origin %s have different tags"),
12932 sect_offset_str (die
->sect_off
),
12933 sect_offset_str (origin_die
->sect_off
));
12935 std::vector
<sect_offset
> offsets
;
12937 for (child_die
= die
->child
;
12938 child_die
&& child_die
->tag
;
12939 child_die
= child_die
->sibling
)
12941 struct die_info
*child_origin_die
;
12942 struct dwarf2_cu
*child_origin_cu
;
12944 /* We are trying to process concrete instance entries:
12945 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
12946 it's not relevant to our analysis here. i.e. detecting DIEs that are
12947 present in the abstract instance but not referenced in the concrete
12949 if (child_die
->tag
== DW_TAG_call_site
12950 || child_die
->tag
== DW_TAG_GNU_call_site
)
12953 /* For each CHILD_DIE, find the corresponding child of
12954 ORIGIN_DIE. If there is more than one layer of
12955 DW_AT_abstract_origin, follow them all; there shouldn't be,
12956 but GCC versions at least through 4.4 generate this (GCC PR
12958 child_origin_die
= child_die
;
12959 child_origin_cu
= cu
;
12962 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
12966 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
12970 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
12971 counterpart may exist. */
12972 if (child_origin_die
!= child_die
)
12974 if (child_die
->tag
!= child_origin_die
->tag
12975 && !(child_die
->tag
== DW_TAG_inlined_subroutine
12976 && child_origin_die
->tag
== DW_TAG_subprogram
))
12977 complaint (_("Child DIE %s and its abstract origin %s have "
12979 sect_offset_str (child_die
->sect_off
),
12980 sect_offset_str (child_origin_die
->sect_off
));
12981 if (child_origin_die
->parent
!= origin_die
)
12982 complaint (_("Child DIE %s and its abstract origin %s have "
12983 "different parents"),
12984 sect_offset_str (child_die
->sect_off
),
12985 sect_offset_str (child_origin_die
->sect_off
));
12987 offsets
.push_back (child_origin_die
->sect_off
);
12990 std::sort (offsets
.begin (), offsets
.end ());
12991 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
12992 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
12993 if (offsetp
[-1] == *offsetp
)
12994 complaint (_("Multiple children of DIE %s refer "
12995 "to DIE %s as their abstract origin"),
12996 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
12998 offsetp
= offsets
.data ();
12999 origin_child_die
= origin_die
->child
;
13000 while (origin_child_die
&& origin_child_die
->tag
)
13002 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13003 while (offsetp
< offsets_end
13004 && *offsetp
< origin_child_die
->sect_off
)
13006 if (offsetp
>= offsets_end
13007 || *offsetp
> origin_child_die
->sect_off
)
13009 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13010 Check whether we're already processing ORIGIN_CHILD_DIE.
13011 This can happen with mutually referenced abstract_origins.
13013 if (!origin_child_die
->in_process
)
13014 process_die (origin_child_die
, origin_cu
);
13016 origin_child_die
= origin_child_die
->sibling
;
13018 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13020 if (cu
!= origin_cu
)
13021 compute_delayed_physnames (origin_cu
);
13025 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13027 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
13028 struct gdbarch
*gdbarch
= objfile
->arch ();
13029 struct context_stack
*newobj
;
13032 struct die_info
*child_die
;
13033 struct attribute
*attr
, *call_line
, *call_file
;
13035 CORE_ADDR baseaddr
;
13036 struct block
*block
;
13037 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13038 std::vector
<struct symbol
*> template_args
;
13039 struct template_symbol
*templ_func
= NULL
;
13043 /* If we do not have call site information, we can't show the
13044 caller of this inlined function. That's too confusing, so
13045 only use the scope for local variables. */
13046 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13047 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13048 if (call_line
== NULL
|| call_file
== NULL
)
13050 read_lexical_block_scope (die
, cu
);
13055 baseaddr
= objfile
->text_section_offset ();
13057 name
= dwarf2_name (die
, cu
);
13059 /* Ignore functions with missing or empty names. These are actually
13060 illegal according to the DWARF standard. */
13063 complaint (_("missing name for subprogram DIE at %s"),
13064 sect_offset_str (die
->sect_off
));
13068 /* Ignore functions with missing or invalid low and high pc attributes. */
13069 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13070 <= PC_BOUNDS_INVALID
)
13072 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13073 if (!attr
|| !DW_UNSND (attr
))
13074 complaint (_("cannot get low and high bounds "
13075 "for subprogram DIE at %s"),
13076 sect_offset_str (die
->sect_off
));
13080 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13081 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13083 /* If we have any template arguments, then we must allocate a
13084 different sort of symbol. */
13085 for (child_die
= die
->child
; child_die
; child_die
= child_die
->sibling
)
13087 if (child_die
->tag
== DW_TAG_template_type_param
13088 || child_die
->tag
== DW_TAG_template_value_param
)
13090 templ_func
= new (&objfile
->objfile_obstack
) template_symbol
;
13091 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13096 newobj
= cu
->get_builder ()->push_context (0, lowpc
);
13097 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13098 (struct symbol
*) templ_func
);
13100 if (dwarf2_flag_true_p (die
, DW_AT_main_subprogram
, cu
))
13101 set_objfile_main_name (objfile
, newobj
->name
->linkage_name (),
13104 /* If there is a location expression for DW_AT_frame_base, record
13106 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13107 if (attr
!= nullptr)
13108 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13110 /* If there is a location for the static link, record it. */
13111 newobj
->static_link
= NULL
;
13112 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13113 if (attr
!= nullptr)
13115 newobj
->static_link
13116 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13117 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
,
13121 cu
->list_in_scope
= cu
->get_builder ()->get_local_symbols ();
13123 if (die
->child
!= NULL
)
13125 child_die
= die
->child
;
13126 while (child_die
&& child_die
->tag
)
13128 if (child_die
->tag
== DW_TAG_template_type_param
13129 || child_die
->tag
== DW_TAG_template_value_param
)
13131 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13134 template_args
.push_back (arg
);
13137 process_die (child_die
, cu
);
13138 child_die
= child_die
->sibling
;
13142 inherit_abstract_dies (die
, cu
);
13144 /* If we have a DW_AT_specification, we might need to import using
13145 directives from the context of the specification DIE. See the
13146 comment in determine_prefix. */
13147 if (cu
->language
== language_cplus
13148 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13150 struct dwarf2_cu
*spec_cu
= cu
;
13151 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13155 child_die
= spec_die
->child
;
13156 while (child_die
&& child_die
->tag
)
13158 if (child_die
->tag
== DW_TAG_imported_module
)
13159 process_die (child_die
, spec_cu
);
13160 child_die
= child_die
->sibling
;
13163 /* In some cases, GCC generates specification DIEs that
13164 themselves contain DW_AT_specification attributes. */
13165 spec_die
= die_specification (spec_die
, &spec_cu
);
13169 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13170 /* Make a block for the local symbols within. */
13171 block
= cu
->get_builder ()->finish_block (cstk
.name
, cstk
.old_blocks
,
13172 cstk
.static_link
, lowpc
, highpc
);
13174 /* For C++, set the block's scope. */
13175 if ((cu
->language
== language_cplus
13176 || cu
->language
== language_fortran
13177 || cu
->language
== language_d
13178 || cu
->language
== language_rust
)
13179 && cu
->processing_has_namespace_info
)
13180 block_set_scope (block
, determine_prefix (die
, cu
),
13181 &objfile
->objfile_obstack
);
13183 /* If we have address ranges, record them. */
13184 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13186 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
13188 /* Attach template arguments to function. */
13189 if (!template_args
.empty ())
13191 gdb_assert (templ_func
!= NULL
);
13193 templ_func
->n_template_arguments
= template_args
.size ();
13194 templ_func
->template_arguments
13195 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13196 templ_func
->n_template_arguments
);
13197 memcpy (templ_func
->template_arguments
,
13198 template_args
.data (),
13199 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13201 /* Make sure that the symtab is set on the new symbols. Even
13202 though they don't appear in this symtab directly, other parts
13203 of gdb assume that symbols do, and this is reasonably
13205 for (symbol
*sym
: template_args
)
13206 symbol_set_symtab (sym
, symbol_symtab (templ_func
));
13209 /* In C++, we can have functions nested inside functions (e.g., when
13210 a function declares a class that has methods). This means that
13211 when we finish processing a function scope, we may need to go
13212 back to building a containing block's symbol lists. */
13213 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13214 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13216 /* If we've finished processing a top-level function, subsequent
13217 symbols go in the file symbol list. */
13218 if (cu
->get_builder ()->outermost_context_p ())
13219 cu
->list_in_scope
= cu
->get_builder ()->get_file_symbols ();
13222 /* Process all the DIES contained within a lexical block scope. Start
13223 a new scope, process the dies, and then close the scope. */
13226 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13228 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
13229 struct gdbarch
*gdbarch
= objfile
->arch ();
13230 CORE_ADDR lowpc
, highpc
;
13231 struct die_info
*child_die
;
13232 CORE_ADDR baseaddr
;
13234 baseaddr
= objfile
->text_section_offset ();
13236 /* Ignore blocks with missing or invalid low and high pc attributes. */
13237 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13238 as multiple lexical blocks? Handling children in a sane way would
13239 be nasty. Might be easier to properly extend generic blocks to
13240 describe ranges. */
13241 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13243 case PC_BOUNDS_NOT_PRESENT
:
13244 /* DW_TAG_lexical_block has no attributes, process its children as if
13245 there was no wrapping by that DW_TAG_lexical_block.
13246 GCC does no longer produces such DWARF since GCC r224161. */
13247 for (child_die
= die
->child
;
13248 child_die
!= NULL
&& child_die
->tag
;
13249 child_die
= child_die
->sibling
)
13251 /* We might already be processing this DIE. This can happen
13252 in an unusual circumstance -- where a subroutine A
13253 appears lexically in another subroutine B, but A actually
13254 inlines B. The recursion is broken here, rather than in
13255 inherit_abstract_dies, because it seems better to simply
13256 drop concrete children here. */
13257 if (!child_die
->in_process
)
13258 process_die (child_die
, cu
);
13261 case PC_BOUNDS_INVALID
:
13264 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13265 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13267 cu
->get_builder ()->push_context (0, lowpc
);
13268 if (die
->child
!= NULL
)
13270 child_die
= die
->child
;
13271 while (child_die
&& child_die
->tag
)
13273 process_die (child_die
, cu
);
13274 child_die
= child_die
->sibling
;
13277 inherit_abstract_dies (die
, cu
);
13278 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13280 if (*cu
->get_builder ()->get_local_symbols () != NULL
13281 || (*cu
->get_builder ()->get_local_using_directives ()) != NULL
)
13283 struct block
*block
13284 = cu
->get_builder ()->finish_block (0, cstk
.old_blocks
, NULL
,
13285 cstk
.start_addr
, highpc
);
13287 /* Note that recording ranges after traversing children, as we
13288 do here, means that recording a parent's ranges entails
13289 walking across all its children's ranges as they appear in
13290 the address map, which is quadratic behavior.
13292 It would be nicer to record the parent's ranges before
13293 traversing its children, simply overriding whatever you find
13294 there. But since we don't even decide whether to create a
13295 block until after we've traversed its children, that's hard
13297 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13299 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13300 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13303 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13306 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13308 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
13309 struct objfile
*objfile
= per_objfile
->objfile
;
13310 struct gdbarch
*gdbarch
= objfile
->arch ();
13311 CORE_ADDR pc
, baseaddr
;
13312 struct attribute
*attr
;
13313 struct call_site
*call_site
, call_site_local
;
13316 struct die_info
*child_die
;
13318 baseaddr
= objfile
->text_section_offset ();
13320 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13323 /* This was a pre-DWARF-5 GNU extension alias
13324 for DW_AT_call_return_pc. */
13325 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13329 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13330 "DIE %s [in module %s]"),
13331 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13334 pc
= attr
->value_as_address () + baseaddr
;
13335 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13337 if (cu
->call_site_htab
== NULL
)
13338 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13339 NULL
, &objfile
->objfile_obstack
,
13340 hashtab_obstack_allocate
, NULL
);
13341 call_site_local
.pc
= pc
;
13342 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13345 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13346 "DIE %s [in module %s]"),
13347 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13348 objfile_name (objfile
));
13352 /* Count parameters at the caller. */
13355 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13356 child_die
= child_die
->sibling
)
13358 if (child_die
->tag
!= DW_TAG_call_site_parameter
13359 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13361 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
13362 "DW_TAG_call_site child DIE %s [in module %s]"),
13363 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13364 objfile_name (objfile
));
13372 = ((struct call_site
*)
13373 obstack_alloc (&objfile
->objfile_obstack
,
13374 sizeof (*call_site
)
13375 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13377 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13378 call_site
->pc
= pc
;
13380 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13381 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13383 struct die_info
*func_die
;
13385 /* Skip also over DW_TAG_inlined_subroutine. */
13386 for (func_die
= die
->parent
;
13387 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13388 && func_die
->tag
!= DW_TAG_subroutine_type
;
13389 func_die
= func_die
->parent
);
13391 /* DW_AT_call_all_calls is a superset
13392 of DW_AT_call_all_tail_calls. */
13394 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13395 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13396 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13397 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13399 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13400 not complete. But keep CALL_SITE for look ups via call_site_htab,
13401 both the initial caller containing the real return address PC and
13402 the final callee containing the current PC of a chain of tail
13403 calls do not need to have the tail call list complete. But any
13404 function candidate for a virtual tail call frame searched via
13405 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13406 determined unambiguously. */
13410 struct type
*func_type
= NULL
;
13413 func_type
= get_die_type (func_die
, cu
);
13414 if (func_type
!= NULL
)
13416 gdb_assert (func_type
->code () == TYPE_CODE_FUNC
);
13418 /* Enlist this call site to the function. */
13419 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13420 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13423 complaint (_("Cannot find function owning DW_TAG_call_site "
13424 "DIE %s [in module %s]"),
13425 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13429 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13431 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13433 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13436 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13437 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13439 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
13440 if (!attr
|| (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0))
13441 /* Keep NULL DWARF_BLOCK. */;
13442 else if (attr
->form_is_block ())
13444 struct dwarf2_locexpr_baton
*dlbaton
;
13446 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13447 dlbaton
->data
= DW_BLOCK (attr
)->data
;
13448 dlbaton
->size
= DW_BLOCK (attr
)->size
;
13449 dlbaton
->per_objfile
= per_objfile
;
13450 dlbaton
->per_cu
= cu
->per_cu
;
13452 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
13454 else if (attr
->form_is_ref ())
13456 struct dwarf2_cu
*target_cu
= cu
;
13457 struct die_info
*target_die
;
13459 target_die
= follow_die_ref (die
, attr
, &target_cu
);
13460 gdb_assert (target_cu
->per_objfile
->objfile
== objfile
);
13461 if (die_is_declaration (target_die
, target_cu
))
13463 const char *target_physname
;
13465 /* Prefer the mangled name; otherwise compute the demangled one. */
13466 target_physname
= dw2_linkage_name (target_die
, target_cu
);
13467 if (target_physname
== NULL
)
13468 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
13469 if (target_physname
== NULL
)
13470 complaint (_("DW_AT_call_target target DIE has invalid "
13471 "physname, for referencing DIE %s [in module %s]"),
13472 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13474 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
13480 /* DW_AT_entry_pc should be preferred. */
13481 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
13482 <= PC_BOUNDS_INVALID
)
13483 complaint (_("DW_AT_call_target target DIE has invalid "
13484 "low pc, for referencing DIE %s [in module %s]"),
13485 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13488 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13489 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
13494 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
13495 "block nor reference, for DIE %s [in module %s]"),
13496 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13498 call_site
->per_cu
= cu
->per_cu
;
13499 call_site
->per_objfile
= per_objfile
;
13501 for (child_die
= die
->child
;
13502 child_die
&& child_die
->tag
;
13503 child_die
= child_die
->sibling
)
13505 struct call_site_parameter
*parameter
;
13506 struct attribute
*loc
, *origin
;
13508 if (child_die
->tag
!= DW_TAG_call_site_parameter
13509 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13511 /* Already printed the complaint above. */
13515 gdb_assert (call_site
->parameter_count
< nparams
);
13516 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
13518 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
13519 specifies DW_TAG_formal_parameter. Value of the data assumed for the
13520 register is contained in DW_AT_call_value. */
13522 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
13523 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
13524 if (origin
== NULL
)
13526 /* This was a pre-DWARF-5 GNU extension alias
13527 for DW_AT_call_parameter. */
13528 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
13530 if (loc
== NULL
&& origin
!= NULL
&& origin
->form_is_ref ())
13532 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
13534 sect_offset sect_off
= origin
->get_ref_die_offset ();
13535 if (!cu
->header
.offset_in_cu_p (sect_off
))
13537 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
13538 binding can be done only inside one CU. Such referenced DIE
13539 therefore cannot be even moved to DW_TAG_partial_unit. */
13540 complaint (_("DW_AT_call_parameter offset is not in CU for "
13541 "DW_TAG_call_site child DIE %s [in module %s]"),
13542 sect_offset_str (child_die
->sect_off
),
13543 objfile_name (objfile
));
13546 parameter
->u
.param_cu_off
13547 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
13549 else if (loc
== NULL
|| origin
!= NULL
|| !loc
->form_is_block ())
13551 complaint (_("No DW_FORM_block* DW_AT_location for "
13552 "DW_TAG_call_site child DIE %s [in module %s]"),
13553 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
13558 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
13559 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
13560 if (parameter
->u
.dwarf_reg
!= -1)
13561 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
13562 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
13563 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
13564 ¶meter
->u
.fb_offset
))
13565 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
13568 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
13569 "for DW_FORM_block* DW_AT_location is supported for "
13570 "DW_TAG_call_site child DIE %s "
13572 sect_offset_str (child_die
->sect_off
),
13573 objfile_name (objfile
));
13578 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
13580 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
13581 if (attr
== NULL
|| !attr
->form_is_block ())
13583 complaint (_("No DW_FORM_block* DW_AT_call_value for "
13584 "DW_TAG_call_site child DIE %s [in module %s]"),
13585 sect_offset_str (child_die
->sect_off
),
13586 objfile_name (objfile
));
13589 parameter
->value
= DW_BLOCK (attr
)->data
;
13590 parameter
->value_size
= DW_BLOCK (attr
)->size
;
13592 /* Parameters are not pre-cleared by memset above. */
13593 parameter
->data_value
= NULL
;
13594 parameter
->data_value_size
= 0;
13595 call_site
->parameter_count
++;
13597 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
13599 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
13600 if (attr
!= nullptr)
13602 if (!attr
->form_is_block ())
13603 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
13604 "DW_TAG_call_site child DIE %s [in module %s]"),
13605 sect_offset_str (child_die
->sect_off
),
13606 objfile_name (objfile
));
13609 parameter
->data_value
= DW_BLOCK (attr
)->data
;
13610 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
13616 /* Helper function for read_variable. If DIE represents a virtual
13617 table, then return the type of the concrete object that is
13618 associated with the virtual table. Otherwise, return NULL. */
13620 static struct type
*
13621 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13623 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13627 /* Find the type DIE. */
13628 struct die_info
*type_die
= NULL
;
13629 struct dwarf2_cu
*type_cu
= cu
;
13631 if (attr
->form_is_ref ())
13632 type_die
= follow_die_ref (die
, attr
, &type_cu
);
13633 if (type_die
== NULL
)
13636 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
13638 return die_containing_type (type_die
, type_cu
);
13641 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
13644 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
13646 struct rust_vtable_symbol
*storage
= NULL
;
13648 if (cu
->language
== language_rust
)
13650 struct type
*containing_type
= rust_containing_type (die
, cu
);
13652 if (containing_type
!= NULL
)
13654 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
13656 storage
= new (&objfile
->objfile_obstack
) rust_vtable_symbol
;
13657 storage
->concrete_type
= containing_type
;
13658 storage
->subclass
= SYMBOL_RUST_VTABLE
;
13662 struct symbol
*res
= new_symbol (die
, NULL
, cu
, storage
);
13663 struct attribute
*abstract_origin
13664 = dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13665 struct attribute
*loc
= dwarf2_attr (die
, DW_AT_location
, cu
);
13666 if (res
== NULL
&& loc
&& abstract_origin
)
13668 /* We have a variable without a name, but with a location and an abstract
13669 origin. This may be a concrete instance of an abstract variable
13670 referenced from an DW_OP_GNU_variable_value, so save it to find it back
13672 struct dwarf2_cu
*origin_cu
= cu
;
13673 struct die_info
*origin_die
13674 = follow_die_ref (die
, abstract_origin
, &origin_cu
);
13675 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
13676 per_objfile
->per_bfd
->abstract_to_concrete
13677 [origin_die
->sect_off
].push_back (die
->sect_off
);
13681 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
13682 reading .debug_rnglists.
13683 Callback's type should be:
13684 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13685 Return true if the attributes are present and valid, otherwise,
13688 template <typename Callback
>
13690 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
13691 Callback
&&callback
)
13693 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
13694 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13695 bfd
*obfd
= objfile
->obfd
;
13696 /* Base address selection entry. */
13697 gdb::optional
<CORE_ADDR
> base
;
13698 const gdb_byte
*buffer
;
13699 CORE_ADDR baseaddr
;
13700 bool overflow
= false;
13702 base
= cu
->base_address
;
13704 dwarf2_per_objfile
->per_bfd
->rnglists
.read (objfile
);
13705 if (offset
>= dwarf2_per_objfile
->per_bfd
->rnglists
.size
)
13707 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
13711 buffer
= dwarf2_per_objfile
->per_bfd
->rnglists
.buffer
+ offset
;
13713 baseaddr
= objfile
->text_section_offset ();
13717 /* Initialize it due to a false compiler warning. */
13718 CORE_ADDR range_beginning
= 0, range_end
= 0;
13719 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->per_bfd
->rnglists
.buffer
13720 + dwarf2_per_objfile
->per_bfd
->rnglists
.size
);
13721 unsigned int bytes_read
;
13723 if (buffer
== buf_end
)
13728 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
13731 case DW_RLE_end_of_list
:
13733 case DW_RLE_base_address
:
13734 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13739 base
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
13740 buffer
+= bytes_read
;
13742 case DW_RLE_start_length
:
13743 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13748 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
13750 buffer
+= bytes_read
;
13751 range_end
= (range_beginning
13752 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
13753 buffer
+= bytes_read
;
13754 if (buffer
> buf_end
)
13760 case DW_RLE_offset_pair
:
13761 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13762 buffer
+= bytes_read
;
13763 if (buffer
> buf_end
)
13768 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13769 buffer
+= bytes_read
;
13770 if (buffer
> buf_end
)
13776 case DW_RLE_start_end
:
13777 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
13782 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
13784 buffer
+= bytes_read
;
13785 range_end
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
13786 buffer
+= bytes_read
;
13789 complaint (_("Invalid .debug_rnglists data (no base address)"));
13792 if (rlet
== DW_RLE_end_of_list
|| overflow
)
13794 if (rlet
== DW_RLE_base_address
)
13797 if (!base
.has_value ())
13799 /* We have no valid base address for the ranges
13801 complaint (_("Invalid .debug_rnglists data (no base address)"));
13805 if (range_beginning
> range_end
)
13807 /* Inverted range entries are invalid. */
13808 complaint (_("Invalid .debug_rnglists data (inverted range)"));
13812 /* Empty range entries have no effect. */
13813 if (range_beginning
== range_end
)
13816 range_beginning
+= *base
;
13817 range_end
+= *base
;
13819 /* A not-uncommon case of bad debug info.
13820 Don't pollute the addrmap with bad data. */
13821 if (range_beginning
+ baseaddr
== 0
13822 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
13824 complaint (_(".debug_rnglists entry has start address of zero"
13825 " [in module %s]"), objfile_name (objfile
));
13829 callback (range_beginning
, range_end
);
13834 complaint (_("Offset %d is not terminated "
13835 "for DW_AT_ranges attribute"),
13843 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
13844 Callback's type should be:
13845 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13846 Return 1 if the attributes are present and valid, otherwise, return 0. */
13848 template <typename Callback
>
13850 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
13851 Callback
&&callback
)
13853 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
13854 struct objfile
*objfile
= per_objfile
->objfile
;
13855 struct comp_unit_head
*cu_header
= &cu
->header
;
13856 bfd
*obfd
= objfile
->obfd
;
13857 unsigned int addr_size
= cu_header
->addr_size
;
13858 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
13859 /* Base address selection entry. */
13860 gdb::optional
<CORE_ADDR
> base
;
13861 unsigned int dummy
;
13862 const gdb_byte
*buffer
;
13863 CORE_ADDR baseaddr
;
13865 if (cu_header
->version
>= 5)
13866 return dwarf2_rnglists_process (offset
, cu
, callback
);
13868 base
= cu
->base_address
;
13870 per_objfile
->per_bfd
->ranges
.read (objfile
);
13871 if (offset
>= per_objfile
->per_bfd
->ranges
.size
)
13873 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
13877 buffer
= per_objfile
->per_bfd
->ranges
.buffer
+ offset
;
13879 baseaddr
= objfile
->text_section_offset ();
13883 CORE_ADDR range_beginning
, range_end
;
13885 range_beginning
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
13886 buffer
+= addr_size
;
13887 range_end
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
13888 buffer
+= addr_size
;
13889 offset
+= 2 * addr_size
;
13891 /* An end of list marker is a pair of zero addresses. */
13892 if (range_beginning
== 0 && range_end
== 0)
13893 /* Found the end of list entry. */
13896 /* Each base address selection entry is a pair of 2 values.
13897 The first is the largest possible address, the second is
13898 the base address. Check for a base address here. */
13899 if ((range_beginning
& mask
) == mask
)
13901 /* If we found the largest possible address, then we already
13902 have the base address in range_end. */
13907 if (!base
.has_value ())
13909 /* We have no valid base address for the ranges
13911 complaint (_("Invalid .debug_ranges data (no base address)"));
13915 if (range_beginning
> range_end
)
13917 /* Inverted range entries are invalid. */
13918 complaint (_("Invalid .debug_ranges data (inverted range)"));
13922 /* Empty range entries have no effect. */
13923 if (range_beginning
== range_end
)
13926 range_beginning
+= *base
;
13927 range_end
+= *base
;
13929 /* A not-uncommon case of bad debug info.
13930 Don't pollute the addrmap with bad data. */
13931 if (range_beginning
+ baseaddr
== 0
13932 && !per_objfile
->per_bfd
->has_section_at_zero
)
13934 complaint (_(".debug_ranges entry has start address of zero"
13935 " [in module %s]"), objfile_name (objfile
));
13939 callback (range_beginning
, range_end
);
13945 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
13946 Return 1 if the attributes are present and valid, otherwise, return 0.
13947 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
13950 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
13951 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
13952 dwarf2_psymtab
*ranges_pst
)
13954 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
13955 struct gdbarch
*gdbarch
= objfile
->arch ();
13956 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
13959 CORE_ADDR high
= 0;
13962 retval
= dwarf2_ranges_process (offset
, cu
,
13963 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
13965 if (ranges_pst
!= NULL
)
13970 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
13971 range_beginning
+ baseaddr
)
13973 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
13974 range_end
+ baseaddr
)
13976 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
13977 lowpc
, highpc
- 1, ranges_pst
);
13980 /* FIXME: This is recording everything as a low-high
13981 segment of consecutive addresses. We should have a
13982 data structure for discontiguous block ranges
13986 low
= range_beginning
;
13992 if (range_beginning
< low
)
13993 low
= range_beginning
;
13994 if (range_end
> high
)
14002 /* If the first entry is an end-of-list marker, the range
14003 describes an empty scope, i.e. no instructions. */
14009 *high_return
= high
;
14013 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14014 definition for the return value. *LOWPC and *HIGHPC are set iff
14015 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14017 static enum pc_bounds_kind
14018 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14019 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14020 dwarf2_psymtab
*pst
)
14022 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
14023 struct attribute
*attr
;
14024 struct attribute
*attr_high
;
14026 CORE_ADDR high
= 0;
14027 enum pc_bounds_kind ret
;
14029 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14032 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14033 if (attr
!= nullptr)
14035 low
= attr
->value_as_address ();
14036 high
= attr_high
->value_as_address ();
14037 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
14041 /* Found high w/o low attribute. */
14042 return PC_BOUNDS_INVALID
;
14044 /* Found consecutive range of addresses. */
14045 ret
= PC_BOUNDS_HIGH_LOW
;
14049 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14052 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
14053 We take advantage of the fact that DW_AT_ranges does not appear
14054 in DW_TAG_compile_unit of DWO files. */
14055 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14056 unsigned int ranges_offset
= (DW_UNSND (attr
)
14057 + (need_ranges_base
14061 /* Value of the DW_AT_ranges attribute is the offset in the
14062 .debug_ranges section. */
14063 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
14064 return PC_BOUNDS_INVALID
;
14065 /* Found discontinuous range of addresses. */
14066 ret
= PC_BOUNDS_RANGES
;
14069 return PC_BOUNDS_NOT_PRESENT
;
14072 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14074 return PC_BOUNDS_INVALID
;
14076 /* When using the GNU linker, .gnu.linkonce. sections are used to
14077 eliminate duplicate copies of functions and vtables and such.
14078 The linker will arbitrarily choose one and discard the others.
14079 The AT_*_pc values for such functions refer to local labels in
14080 these sections. If the section from that file was discarded, the
14081 labels are not in the output, so the relocs get a value of 0.
14082 If this is a discarded function, mark the pc bounds as invalid,
14083 so that GDB will ignore it. */
14084 if (low
== 0 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
14085 return PC_BOUNDS_INVALID
;
14093 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14094 its low and high PC addresses. Do nothing if these addresses could not
14095 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14096 and HIGHPC to the high address if greater than HIGHPC. */
14099 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14100 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14101 struct dwarf2_cu
*cu
)
14103 CORE_ADDR low
, high
;
14104 struct die_info
*child
= die
->child
;
14106 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14108 *lowpc
= std::min (*lowpc
, low
);
14109 *highpc
= std::max (*highpc
, high
);
14112 /* If the language does not allow nested subprograms (either inside
14113 subprograms or lexical blocks), we're done. */
14114 if (cu
->language
!= language_ada
)
14117 /* Check all the children of the given DIE. If it contains nested
14118 subprograms, then check their pc bounds. Likewise, we need to
14119 check lexical blocks as well, as they may also contain subprogram
14121 while (child
&& child
->tag
)
14123 if (child
->tag
== DW_TAG_subprogram
14124 || child
->tag
== DW_TAG_lexical_block
)
14125 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14126 child
= child
->sibling
;
14130 /* Get the low and high pc's represented by the scope DIE, and store
14131 them in *LOWPC and *HIGHPC. If the correct values can't be
14132 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14135 get_scope_pc_bounds (struct die_info
*die
,
14136 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14137 struct dwarf2_cu
*cu
)
14139 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14140 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14141 CORE_ADDR current_low
, current_high
;
14143 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14144 >= PC_BOUNDS_RANGES
)
14146 best_low
= current_low
;
14147 best_high
= current_high
;
14151 struct die_info
*child
= die
->child
;
14153 while (child
&& child
->tag
)
14155 switch (child
->tag
) {
14156 case DW_TAG_subprogram
:
14157 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14159 case DW_TAG_namespace
:
14160 case DW_TAG_module
:
14161 /* FIXME: carlton/2004-01-16: Should we do this for
14162 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14163 that current GCC's always emit the DIEs corresponding
14164 to definitions of methods of classes as children of a
14165 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14166 the DIEs giving the declarations, which could be
14167 anywhere). But I don't see any reason why the
14168 standards says that they have to be there. */
14169 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14171 if (current_low
!= ((CORE_ADDR
) -1))
14173 best_low
= std::min (best_low
, current_low
);
14174 best_high
= std::max (best_high
, current_high
);
14182 child
= child
->sibling
;
14187 *highpc
= best_high
;
14190 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14194 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14195 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14197 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
14198 struct gdbarch
*gdbarch
= objfile
->arch ();
14199 struct attribute
*attr
;
14200 struct attribute
*attr_high
;
14202 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14205 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14206 if (attr
!= nullptr)
14208 CORE_ADDR low
= attr
->value_as_address ();
14209 CORE_ADDR high
= attr_high
->value_as_address ();
14211 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
14214 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14215 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14216 cu
->get_builder ()->record_block_range (block
, low
, high
- 1);
14220 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14221 if (attr
!= nullptr)
14223 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
14224 We take advantage of the fact that DW_AT_ranges does not appear
14225 in DW_TAG_compile_unit of DWO files. */
14226 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14228 /* The value of the DW_AT_ranges attribute is the offset of the
14229 address range list in the .debug_ranges section. */
14230 unsigned long offset
= (DW_UNSND (attr
)
14231 + (need_ranges_base
? cu
->ranges_base
: 0));
14233 std::vector
<blockrange
> blockvec
;
14234 dwarf2_ranges_process (offset
, cu
,
14235 [&] (CORE_ADDR start
, CORE_ADDR end
)
14239 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14240 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14241 cu
->get_builder ()->record_block_range (block
, start
, end
- 1);
14242 blockvec
.emplace_back (start
, end
);
14245 BLOCK_RANGES(block
) = make_blockranges (objfile
, blockvec
);
14249 /* Check whether the producer field indicates either of GCC < 4.6, or the
14250 Intel C/C++ compiler, and cache the result in CU. */
14253 check_producer (struct dwarf2_cu
*cu
)
14257 if (cu
->producer
== NULL
)
14259 /* For unknown compilers expect their behavior is DWARF version
14262 GCC started to support .debug_types sections by -gdwarf-4 since
14263 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14264 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14265 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14266 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14268 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14270 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14271 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14273 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14275 cu
->producer_is_icc
= true;
14276 cu
->producer_is_icc_lt_14
= major
< 14;
14278 else if (startswith (cu
->producer
, "CodeWarrior S12/L-ISA"))
14279 cu
->producer_is_codewarrior
= true;
14282 /* For other non-GCC compilers, expect their behavior is DWARF version
14286 cu
->checked_producer
= true;
14289 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14290 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14291 during 4.6.0 experimental. */
14294 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14296 if (!cu
->checked_producer
)
14297 check_producer (cu
);
14299 return cu
->producer_is_gxx_lt_4_6
;
14303 /* Codewarrior (at least as of version 5.0.40) generates dwarf line information
14304 with incorrect is_stmt attributes. */
14307 producer_is_codewarrior (struct dwarf2_cu
*cu
)
14309 if (!cu
->checked_producer
)
14310 check_producer (cu
);
14312 return cu
->producer_is_codewarrior
;
14315 /* Return the default accessibility type if it is not overridden by
14316 DW_AT_accessibility. */
14318 static enum dwarf_access_attribute
14319 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14321 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14323 /* The default DWARF 2 accessibility for members is public, the default
14324 accessibility for inheritance is private. */
14326 if (die
->tag
!= DW_TAG_inheritance
)
14327 return DW_ACCESS_public
;
14329 return DW_ACCESS_private
;
14333 /* DWARF 3+ defines the default accessibility a different way. The same
14334 rules apply now for DW_TAG_inheritance as for the members and it only
14335 depends on the container kind. */
14337 if (die
->parent
->tag
== DW_TAG_class_type
)
14338 return DW_ACCESS_private
;
14340 return DW_ACCESS_public
;
14344 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14345 offset. If the attribute was not found return 0, otherwise return
14346 1. If it was found but could not properly be handled, set *OFFSET
14350 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14353 struct attribute
*attr
;
14355 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14360 /* Note that we do not check for a section offset first here.
14361 This is because DW_AT_data_member_location is new in DWARF 4,
14362 so if we see it, we can assume that a constant form is really
14363 a constant and not a section offset. */
14364 if (attr
->form_is_constant ())
14365 *offset
= attr
->constant_value (0);
14366 else if (attr
->form_is_section_offset ())
14367 dwarf2_complex_location_expr_complaint ();
14368 else if (attr
->form_is_block ())
14369 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14371 dwarf2_complex_location_expr_complaint ();
14379 /* Look for DW_AT_data_member_location and store the results in FIELD. */
14382 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14383 struct field
*field
)
14385 struct attribute
*attr
;
14387 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14390 if (attr
->form_is_constant ())
14392 LONGEST offset
= attr
->constant_value (0);
14393 SET_FIELD_BITPOS (*field
, offset
* bits_per_byte
);
14395 else if (attr
->form_is_section_offset ())
14396 dwarf2_complex_location_expr_complaint ();
14397 else if (attr
->form_is_block ())
14400 CORE_ADDR offset
= decode_locdesc (DW_BLOCK (attr
), cu
, &handled
);
14402 SET_FIELD_BITPOS (*field
, offset
* bits_per_byte
);
14405 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
14406 struct objfile
*objfile
= per_objfile
->objfile
;
14407 struct dwarf2_locexpr_baton
*dlbaton
14408 = XOBNEW (&objfile
->objfile_obstack
,
14409 struct dwarf2_locexpr_baton
);
14410 dlbaton
->data
= DW_BLOCK (attr
)->data
;
14411 dlbaton
->size
= DW_BLOCK (attr
)->size
;
14412 /* When using this baton, we want to compute the address
14413 of the field, not the value. This is why
14414 is_reference is set to false here. */
14415 dlbaton
->is_reference
= false;
14416 dlbaton
->per_objfile
= per_objfile
;
14417 dlbaton
->per_cu
= cu
->per_cu
;
14419 SET_FIELD_DWARF_BLOCK (*field
, dlbaton
);
14423 dwarf2_complex_location_expr_complaint ();
14427 /* Add an aggregate field to the field list. */
14430 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14431 struct dwarf2_cu
*cu
)
14433 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
14434 struct gdbarch
*gdbarch
= objfile
->arch ();
14435 struct nextfield
*new_field
;
14436 struct attribute
*attr
;
14438 const char *fieldname
= "";
14440 if (die
->tag
== DW_TAG_inheritance
)
14442 fip
->baseclasses
.emplace_back ();
14443 new_field
= &fip
->baseclasses
.back ();
14447 fip
->fields
.emplace_back ();
14448 new_field
= &fip
->fields
.back ();
14451 new_field
->offset
= die
->sect_off
;
14453 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14454 if (attr
!= nullptr)
14455 new_field
->accessibility
= DW_UNSND (attr
);
14457 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
14458 if (new_field
->accessibility
!= DW_ACCESS_public
)
14459 fip
->non_public_fields
= 1;
14461 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14462 if (attr
!= nullptr)
14463 new_field
->virtuality
= DW_UNSND (attr
);
14465 new_field
->virtuality
= DW_VIRTUALITY_none
;
14467 fp
= &new_field
->field
;
14469 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
14471 /* Data member other than a C++ static data member. */
14473 /* Get type of field. */
14474 fp
->type
= die_type (die
, cu
);
14476 SET_FIELD_BITPOS (*fp
, 0);
14478 /* Get bit size of field (zero if none). */
14479 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
14480 if (attr
!= nullptr)
14482 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
14486 FIELD_BITSIZE (*fp
) = 0;
14489 /* Get bit offset of field. */
14490 handle_data_member_location (die
, cu
, fp
);
14491 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
14492 if (attr
!= nullptr)
14494 if (gdbarch_byte_order (gdbarch
) == BFD_ENDIAN_BIG
)
14496 /* For big endian bits, the DW_AT_bit_offset gives the
14497 additional bit offset from the MSB of the containing
14498 anonymous object to the MSB of the field. We don't
14499 have to do anything special since we don't need to
14500 know the size of the anonymous object. */
14501 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
14505 /* For little endian bits, compute the bit offset to the
14506 MSB of the anonymous object, subtract off the number of
14507 bits from the MSB of the field to the MSB of the
14508 object, and then subtract off the number of bits of
14509 the field itself. The result is the bit offset of
14510 the LSB of the field. */
14511 int anonymous_size
;
14512 int bit_offset
= DW_UNSND (attr
);
14514 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14515 if (attr
!= nullptr)
14517 /* The size of the anonymous object containing
14518 the bit field is explicit, so use the
14519 indicated size (in bytes). */
14520 anonymous_size
= DW_UNSND (attr
);
14524 /* The size of the anonymous object containing
14525 the bit field must be inferred from the type
14526 attribute of the data member containing the
14528 anonymous_size
= TYPE_LENGTH (fp
->type
);
14530 SET_FIELD_BITPOS (*fp
,
14531 (FIELD_BITPOS (*fp
)
14532 + anonymous_size
* bits_per_byte
14533 - bit_offset
- FIELD_BITSIZE (*fp
)));
14536 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
14538 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
14539 + attr
->constant_value (0)));
14541 /* Get name of field. */
14542 fieldname
= dwarf2_name (die
, cu
);
14543 if (fieldname
== NULL
)
14546 /* The name is already allocated along with this objfile, so we don't
14547 need to duplicate it for the type. */
14548 fp
->name
= fieldname
;
14550 /* Change accessibility for artificial fields (e.g. virtual table
14551 pointer or virtual base class pointer) to private. */
14552 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
14554 FIELD_ARTIFICIAL (*fp
) = 1;
14555 new_field
->accessibility
= DW_ACCESS_private
;
14556 fip
->non_public_fields
= 1;
14559 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
14561 /* C++ static member. */
14563 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
14564 is a declaration, but all versions of G++ as of this writing
14565 (so through at least 3.2.1) incorrectly generate
14566 DW_TAG_variable tags. */
14568 const char *physname
;
14570 /* Get name of field. */
14571 fieldname
= dwarf2_name (die
, cu
);
14572 if (fieldname
== NULL
)
14575 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
14577 /* Only create a symbol if this is an external value.
14578 new_symbol checks this and puts the value in the global symbol
14579 table, which we want. If it is not external, new_symbol
14580 will try to put the value in cu->list_in_scope which is wrong. */
14581 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
14583 /* A static const member, not much different than an enum as far as
14584 we're concerned, except that we can support more types. */
14585 new_symbol (die
, NULL
, cu
);
14588 /* Get physical name. */
14589 physname
= dwarf2_physname (fieldname
, die
, cu
);
14591 /* The name is already allocated along with this objfile, so we don't
14592 need to duplicate it for the type. */
14593 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
14594 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14595 FIELD_NAME (*fp
) = fieldname
;
14597 else if (die
->tag
== DW_TAG_inheritance
)
14599 /* C++ base class field. */
14600 handle_data_member_location (die
, cu
, fp
);
14601 FIELD_BITSIZE (*fp
) = 0;
14602 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14603 FIELD_NAME (*fp
) = fp
->type
->name ();
14606 gdb_assert_not_reached ("missing case in dwarf2_add_field");
14609 /* Can the type given by DIE define another type? */
14612 type_can_define_types (const struct die_info
*die
)
14616 case DW_TAG_typedef
:
14617 case DW_TAG_class_type
:
14618 case DW_TAG_structure_type
:
14619 case DW_TAG_union_type
:
14620 case DW_TAG_enumeration_type
:
14628 /* Add a type definition defined in the scope of the FIP's class. */
14631 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
14632 struct dwarf2_cu
*cu
)
14634 struct decl_field fp
;
14635 memset (&fp
, 0, sizeof (fp
));
14637 gdb_assert (type_can_define_types (die
));
14639 /* Get name of field. NULL is okay here, meaning an anonymous type. */
14640 fp
.name
= dwarf2_name (die
, cu
);
14641 fp
.type
= read_type_die (die
, cu
);
14643 /* Save accessibility. */
14644 enum dwarf_access_attribute accessibility
;
14645 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14647 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
14649 accessibility
= dwarf2_default_access_attribute (die
, cu
);
14650 switch (accessibility
)
14652 case DW_ACCESS_public
:
14653 /* The assumed value if neither private nor protected. */
14655 case DW_ACCESS_private
:
14658 case DW_ACCESS_protected
:
14659 fp
.is_protected
= 1;
14662 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
14665 if (die
->tag
== DW_TAG_typedef
)
14666 fip
->typedef_field_list
.push_back (fp
);
14668 fip
->nested_types_list
.push_back (fp
);
14671 /* A convenience typedef that's used when finding the discriminant
14672 field for a variant part. */
14673 typedef std::unordered_map
<sect_offset
, int, gdb::hash_enum
<sect_offset
>>
14676 /* Compute the discriminant range for a given variant. OBSTACK is
14677 where the results will be stored. VARIANT is the variant to
14678 process. IS_UNSIGNED indicates whether the discriminant is signed
14681 static const gdb::array_view
<discriminant_range
>
14682 convert_variant_range (struct obstack
*obstack
, const variant_field
&variant
,
14685 std::vector
<discriminant_range
> ranges
;
14687 if (variant
.default_branch
)
14690 if (variant
.discr_list_data
== nullptr)
14692 discriminant_range r
14693 = {variant
.discriminant_value
, variant
.discriminant_value
};
14694 ranges
.push_back (r
);
14698 gdb::array_view
<const gdb_byte
> data (variant
.discr_list_data
->data
,
14699 variant
.discr_list_data
->size
);
14700 while (!data
.empty ())
14702 if (data
[0] != DW_DSC_range
&& data
[0] != DW_DSC_label
)
14704 complaint (_("invalid discriminant marker: %d"), data
[0]);
14707 bool is_range
= data
[0] == DW_DSC_range
;
14708 data
= data
.slice (1);
14710 ULONGEST low
, high
;
14711 unsigned int bytes_read
;
14715 complaint (_("DW_AT_discr_list missing low value"));
14719 low
= read_unsigned_leb128 (nullptr, data
.data (), &bytes_read
);
14721 low
= (ULONGEST
) read_signed_leb128 (nullptr, data
.data (),
14723 data
= data
.slice (bytes_read
);
14729 complaint (_("DW_AT_discr_list missing high value"));
14733 high
= read_unsigned_leb128 (nullptr, data
.data (),
14736 high
= (LONGEST
) read_signed_leb128 (nullptr, data
.data (),
14738 data
= data
.slice (bytes_read
);
14743 ranges
.push_back ({ low
, high
});
14747 discriminant_range
*result
= XOBNEWVEC (obstack
, discriminant_range
,
14749 std::copy (ranges
.begin (), ranges
.end (), result
);
14750 return gdb::array_view
<discriminant_range
> (result
, ranges
.size ());
14753 static const gdb::array_view
<variant_part
> create_variant_parts
14754 (struct obstack
*obstack
,
14755 const offset_map_type
&offset_map
,
14756 struct field_info
*fi
,
14757 const std::vector
<variant_part_builder
> &variant_parts
);
14759 /* Fill in a "struct variant" for a given variant field. RESULT is
14760 the variant to fill in. OBSTACK is where any needed allocations
14761 will be done. OFFSET_MAP holds the mapping from section offsets to
14762 fields for the type. FI describes the fields of the type we're
14763 processing. FIELD is the variant field we're converting. */
14766 create_one_variant (variant
&result
, struct obstack
*obstack
,
14767 const offset_map_type
&offset_map
,
14768 struct field_info
*fi
, const variant_field
&field
)
14770 result
.discriminants
= convert_variant_range (obstack
, field
, false);
14771 result
.first_field
= field
.first_field
+ fi
->baseclasses
.size ();
14772 result
.last_field
= field
.last_field
+ fi
->baseclasses
.size ();
14773 result
.parts
= create_variant_parts (obstack
, offset_map
, fi
,
14774 field
.variant_parts
);
14777 /* Fill in a "struct variant_part" for a given variant part. RESULT
14778 is the variant part to fill in. OBSTACK is where any needed
14779 allocations will be done. OFFSET_MAP holds the mapping from
14780 section offsets to fields for the type. FI describes the fields of
14781 the type we're processing. BUILDER is the variant part to be
14785 create_one_variant_part (variant_part
&result
,
14786 struct obstack
*obstack
,
14787 const offset_map_type
&offset_map
,
14788 struct field_info
*fi
,
14789 const variant_part_builder
&builder
)
14791 auto iter
= offset_map
.find (builder
.discriminant_offset
);
14792 if (iter
== offset_map
.end ())
14794 result
.discriminant_index
= -1;
14795 /* Doesn't matter. */
14796 result
.is_unsigned
= false;
14800 result
.discriminant_index
= iter
->second
;
14802 = TYPE_UNSIGNED (FIELD_TYPE
14803 (fi
->fields
[result
.discriminant_index
].field
));
14806 size_t n
= builder
.variants
.size ();
14807 variant
*output
= new (obstack
) variant
[n
];
14808 for (size_t i
= 0; i
< n
; ++i
)
14809 create_one_variant (output
[i
], obstack
, offset_map
, fi
,
14810 builder
.variants
[i
]);
14812 result
.variants
= gdb::array_view
<variant
> (output
, n
);
14815 /* Create a vector of variant parts that can be attached to a type.
14816 OBSTACK is where any needed allocations will be done. OFFSET_MAP
14817 holds the mapping from section offsets to fields for the type. FI
14818 describes the fields of the type we're processing. VARIANT_PARTS
14819 is the vector to convert. */
14821 static const gdb::array_view
<variant_part
>
14822 create_variant_parts (struct obstack
*obstack
,
14823 const offset_map_type
&offset_map
,
14824 struct field_info
*fi
,
14825 const std::vector
<variant_part_builder
> &variant_parts
)
14827 if (variant_parts
.empty ())
14830 size_t n
= variant_parts
.size ();
14831 variant_part
*result
= new (obstack
) variant_part
[n
];
14832 for (size_t i
= 0; i
< n
; ++i
)
14833 create_one_variant_part (result
[i
], obstack
, offset_map
, fi
,
14836 return gdb::array_view
<variant_part
> (result
, n
);
14839 /* Compute the variant part vector for FIP, attaching it to TYPE when
14843 add_variant_property (struct field_info
*fip
, struct type
*type
,
14844 struct dwarf2_cu
*cu
)
14846 /* Map section offsets of fields to their field index. Note the
14847 field index here does not take the number of baseclasses into
14849 offset_map_type offset_map
;
14850 for (int i
= 0; i
< fip
->fields
.size (); ++i
)
14851 offset_map
[fip
->fields
[i
].offset
] = i
;
14853 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
14854 gdb::array_view
<variant_part
> parts
14855 = create_variant_parts (&objfile
->objfile_obstack
, offset_map
, fip
,
14856 fip
->variant_parts
);
14858 struct dynamic_prop prop
;
14859 prop
.kind
= PROP_VARIANT_PARTS
;
14860 prop
.data
.variant_parts
14861 = ((gdb::array_view
<variant_part
> *)
14862 obstack_copy (&objfile
->objfile_obstack
, &parts
, sizeof (parts
)));
14864 type
->add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
);
14867 /* Create the vector of fields, and attach it to the type. */
14870 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
14871 struct dwarf2_cu
*cu
)
14873 int nfields
= fip
->nfields ();
14875 /* Record the field count, allocate space for the array of fields,
14876 and create blank accessibility bitfields if necessary. */
14877 type
->set_num_fields (nfields
);
14879 ((struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
));
14881 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
14883 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14885 TYPE_FIELD_PRIVATE_BITS (type
) =
14886 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14887 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
14889 TYPE_FIELD_PROTECTED_BITS (type
) =
14890 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14891 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
14893 TYPE_FIELD_IGNORE_BITS (type
) =
14894 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14895 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
14898 /* If the type has baseclasses, allocate and clear a bit vector for
14899 TYPE_FIELD_VIRTUAL_BITS. */
14900 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
14902 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
14903 unsigned char *pointer
;
14905 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14906 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
14907 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
14908 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
14909 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
14912 if (!fip
->variant_parts
.empty ())
14913 add_variant_property (fip
, type
, cu
);
14915 /* Copy the saved-up fields into the field vector. */
14916 for (int i
= 0; i
< nfields
; ++i
)
14918 struct nextfield
&field
14919 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
14920 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
14922 type
->field (i
) = field
.field
;
14923 switch (field
.accessibility
)
14925 case DW_ACCESS_private
:
14926 if (cu
->language
!= language_ada
)
14927 SET_TYPE_FIELD_PRIVATE (type
, i
);
14930 case DW_ACCESS_protected
:
14931 if (cu
->language
!= language_ada
)
14932 SET_TYPE_FIELD_PROTECTED (type
, i
);
14935 case DW_ACCESS_public
:
14939 /* Unknown accessibility. Complain and treat it as public. */
14941 complaint (_("unsupported accessibility %d"),
14942 field
.accessibility
);
14946 if (i
< fip
->baseclasses
.size ())
14948 switch (field
.virtuality
)
14950 case DW_VIRTUALITY_virtual
:
14951 case DW_VIRTUALITY_pure_virtual
:
14952 if (cu
->language
== language_ada
)
14953 error (_("unexpected virtuality in component of Ada type"));
14954 SET_TYPE_FIELD_VIRTUAL (type
, i
);
14961 /* Return true if this member function is a constructor, false
14965 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
14967 const char *fieldname
;
14968 const char *type_name
;
14971 if (die
->parent
== NULL
)
14974 if (die
->parent
->tag
!= DW_TAG_structure_type
14975 && die
->parent
->tag
!= DW_TAG_union_type
14976 && die
->parent
->tag
!= DW_TAG_class_type
)
14979 fieldname
= dwarf2_name (die
, cu
);
14980 type_name
= dwarf2_name (die
->parent
, cu
);
14981 if (fieldname
== NULL
|| type_name
== NULL
)
14984 len
= strlen (fieldname
);
14985 return (strncmp (fieldname
, type_name
, len
) == 0
14986 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
14989 /* Check if the given VALUE is a recognized enum
14990 dwarf_defaulted_attribute constant according to DWARF5 spec,
14994 is_valid_DW_AT_defaulted (ULONGEST value
)
14998 case DW_DEFAULTED_no
:
14999 case DW_DEFAULTED_in_class
:
15000 case DW_DEFAULTED_out_of_class
:
15004 complaint (_("unrecognized DW_AT_defaulted value (%s)"), pulongest (value
));
15008 /* Add a member function to the proper fieldlist. */
15011 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15012 struct type
*type
, struct dwarf2_cu
*cu
)
15014 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
15015 struct attribute
*attr
;
15017 struct fnfieldlist
*flp
= nullptr;
15018 struct fn_field
*fnp
;
15019 const char *fieldname
;
15020 struct type
*this_type
;
15021 enum dwarf_access_attribute accessibility
;
15023 if (cu
->language
== language_ada
)
15024 error (_("unexpected member function in Ada type"));
15026 /* Get name of member function. */
15027 fieldname
= dwarf2_name (die
, cu
);
15028 if (fieldname
== NULL
)
15031 /* Look up member function name in fieldlist. */
15032 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15034 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15036 flp
= &fip
->fnfieldlists
[i
];
15041 /* Create a new fnfieldlist if necessary. */
15042 if (flp
== nullptr)
15044 fip
->fnfieldlists
.emplace_back ();
15045 flp
= &fip
->fnfieldlists
.back ();
15046 flp
->name
= fieldname
;
15047 i
= fip
->fnfieldlists
.size () - 1;
15050 /* Create a new member function field and add it to the vector of
15052 flp
->fnfields
.emplace_back ();
15053 fnp
= &flp
->fnfields
.back ();
15055 /* Delay processing of the physname until later. */
15056 if (cu
->language
== language_cplus
)
15057 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15061 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15062 fnp
->physname
= physname
? physname
: "";
15065 fnp
->type
= alloc_type (objfile
);
15066 this_type
= read_type_die (die
, cu
);
15067 if (this_type
&& this_type
->code () == TYPE_CODE_FUNC
)
15069 int nparams
= this_type
->num_fields ();
15071 /* TYPE is the domain of this method, and THIS_TYPE is the type
15072 of the method itself (TYPE_CODE_METHOD). */
15073 smash_to_method_type (fnp
->type
, type
,
15074 TYPE_TARGET_TYPE (this_type
),
15075 this_type
->fields (),
15076 this_type
->num_fields (),
15077 TYPE_VARARGS (this_type
));
15079 /* Handle static member functions.
15080 Dwarf2 has no clean way to discern C++ static and non-static
15081 member functions. G++ helps GDB by marking the first
15082 parameter for non-static member functions (which is the this
15083 pointer) as artificial. We obtain this information from
15084 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15085 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15086 fnp
->voffset
= VOFFSET_STATIC
;
15089 complaint (_("member function type missing for '%s'"),
15090 dwarf2_full_name (fieldname
, die
, cu
));
15092 /* Get fcontext from DW_AT_containing_type if present. */
15093 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15094 fnp
->fcontext
= die_containing_type (die
, cu
);
15096 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15097 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15099 /* Get accessibility. */
15100 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15101 if (attr
!= nullptr)
15102 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15104 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15105 switch (accessibility
)
15107 case DW_ACCESS_private
:
15108 fnp
->is_private
= 1;
15110 case DW_ACCESS_protected
:
15111 fnp
->is_protected
= 1;
15115 /* Check for artificial methods. */
15116 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15117 if (attr
&& DW_UNSND (attr
) != 0)
15118 fnp
->is_artificial
= 1;
15120 /* Check for defaulted methods. */
15121 attr
= dwarf2_attr (die
, DW_AT_defaulted
, cu
);
15122 if (attr
!= nullptr && is_valid_DW_AT_defaulted (DW_UNSND (attr
)))
15123 fnp
->defaulted
= (enum dwarf_defaulted_attribute
) DW_UNSND (attr
);
15125 /* Check for deleted methods. */
15126 attr
= dwarf2_attr (die
, DW_AT_deleted
, cu
);
15127 if (attr
!= nullptr && DW_UNSND (attr
) != 0)
15128 fnp
->is_deleted
= 1;
15130 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15132 /* Get index in virtual function table if it is a virtual member
15133 function. For older versions of GCC, this is an offset in the
15134 appropriate virtual table, as specified by DW_AT_containing_type.
15135 For everyone else, it is an expression to be evaluated relative
15136 to the object address. */
15138 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15139 if (attr
!= nullptr)
15141 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
> 0)
15143 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15145 /* Old-style GCC. */
15146 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15148 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15149 || (DW_BLOCK (attr
)->size
> 1
15150 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15151 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15153 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15154 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15155 dwarf2_complex_location_expr_complaint ();
15157 fnp
->voffset
/= cu
->header
.addr_size
;
15161 dwarf2_complex_location_expr_complaint ();
15163 if (!fnp
->fcontext
)
15165 /* If there is no `this' field and no DW_AT_containing_type,
15166 we cannot actually find a base class context for the
15168 if (this_type
->num_fields () == 0
15169 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15171 complaint (_("cannot determine context for virtual member "
15172 "function \"%s\" (offset %s)"),
15173 fieldname
, sect_offset_str (die
->sect_off
));
15178 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15182 else if (attr
->form_is_section_offset ())
15184 dwarf2_complex_location_expr_complaint ();
15188 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15194 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15195 if (attr
&& DW_UNSND (attr
))
15197 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15198 complaint (_("Member function \"%s\" (offset %s) is virtual "
15199 "but the vtable offset is not specified"),
15200 fieldname
, sect_offset_str (die
->sect_off
));
15201 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15202 TYPE_CPLUS_DYNAMIC (type
) = 1;
15207 /* Create the vector of member function fields, and attach it to the type. */
15210 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15211 struct dwarf2_cu
*cu
)
15213 if (cu
->language
== language_ada
)
15214 error (_("unexpected member functions in Ada type"));
15216 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15217 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15219 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15221 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15223 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15224 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15226 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15227 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15228 fn_flp
->fn_fields
= (struct fn_field
*)
15229 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15231 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15232 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15235 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15238 /* Returns non-zero if NAME is the name of a vtable member in CU's
15239 language, zero otherwise. */
15241 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15243 static const char vptr
[] = "_vptr";
15245 /* Look for the C++ form of the vtable. */
15246 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15252 /* GCC outputs unnamed structures that are really pointers to member
15253 functions, with the ABI-specified layout. If TYPE describes
15254 such a structure, smash it into a member function type.
15256 GCC shouldn't do this; it should just output pointer to member DIEs.
15257 This is GCC PR debug/28767. */
15260 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15262 struct type
*pfn_type
, *self_type
, *new_type
;
15264 /* Check for a structure with no name and two children. */
15265 if (type
->code () != TYPE_CODE_STRUCT
|| type
->num_fields () != 2)
15268 /* Check for __pfn and __delta members. */
15269 if (TYPE_FIELD_NAME (type
, 0) == NULL
15270 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15271 || TYPE_FIELD_NAME (type
, 1) == NULL
15272 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15275 /* Find the type of the method. */
15276 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15277 if (pfn_type
== NULL
15278 || pfn_type
->code () != TYPE_CODE_PTR
15279 || TYPE_TARGET_TYPE (pfn_type
)->code () != TYPE_CODE_FUNC
)
15282 /* Look for the "this" argument. */
15283 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15284 if (pfn_type
->num_fields () == 0
15285 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15286 || TYPE_FIELD_TYPE (pfn_type
, 0)->code () != TYPE_CODE_PTR
)
15289 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15290 new_type
= alloc_type (objfile
);
15291 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15292 pfn_type
->fields (), pfn_type
->num_fields (),
15293 TYPE_VARARGS (pfn_type
));
15294 smash_to_methodptr_type (type
, new_type
);
15297 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15298 appropriate error checking and issuing complaints if there is a
15302 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15304 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15306 if (attr
== nullptr)
15309 if (!attr
->form_is_constant ())
15311 complaint (_("DW_AT_alignment must have constant form"
15312 " - DIE at %s [in module %s]"),
15313 sect_offset_str (die
->sect_off
),
15314 objfile_name (cu
->per_objfile
->objfile
));
15319 if (attr
->form
== DW_FORM_sdata
)
15321 LONGEST val
= DW_SND (attr
);
15324 complaint (_("DW_AT_alignment value must not be negative"
15325 " - DIE at %s [in module %s]"),
15326 sect_offset_str (die
->sect_off
),
15327 objfile_name (cu
->per_objfile
->objfile
));
15333 align
= DW_UNSND (attr
);
15337 complaint (_("DW_AT_alignment value must not be zero"
15338 " - DIE at %s [in module %s]"),
15339 sect_offset_str (die
->sect_off
),
15340 objfile_name (cu
->per_objfile
->objfile
));
15343 if ((align
& (align
- 1)) != 0)
15345 complaint (_("DW_AT_alignment value must be a power of 2"
15346 " - DIE at %s [in module %s]"),
15347 sect_offset_str (die
->sect_off
),
15348 objfile_name (cu
->per_objfile
->objfile
));
15355 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15356 the alignment for TYPE. */
15359 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15362 if (!set_type_align (type
, get_alignment (cu
, die
)))
15363 complaint (_("DW_AT_alignment value too large"
15364 " - DIE at %s [in module %s]"),
15365 sect_offset_str (die
->sect_off
),
15366 objfile_name (cu
->per_objfile
->objfile
));
15369 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15370 constant for a type, according to DWARF5 spec, Table 5.5. */
15373 is_valid_DW_AT_calling_convention_for_type (ULONGEST value
)
15378 case DW_CC_pass_by_reference
:
15379 case DW_CC_pass_by_value
:
15383 complaint (_("unrecognized DW_AT_calling_convention value "
15384 "(%s) for a type"), pulongest (value
));
15389 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15390 constant for a subroutine, according to DWARF5 spec, Table 3.3, and
15391 also according to GNU-specific values (see include/dwarf2.h). */
15394 is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value
)
15399 case DW_CC_program
:
15403 case DW_CC_GNU_renesas_sh
:
15404 case DW_CC_GNU_borland_fastcall_i386
:
15405 case DW_CC_GDB_IBM_OpenCL
:
15409 complaint (_("unrecognized DW_AT_calling_convention value "
15410 "(%s) for a subroutine"), pulongest (value
));
15415 /* Called when we find the DIE that starts a structure or union scope
15416 (definition) to create a type for the structure or union. Fill in
15417 the type's name and general properties; the members will not be
15418 processed until process_structure_scope. A symbol table entry for
15419 the type will also not be done until process_structure_scope (assuming
15420 the type has a name).
15422 NOTE: we need to call these functions regardless of whether or not the
15423 DIE has a DW_AT_name attribute, since it might be an anonymous
15424 structure or union. This gets the type entered into our set of
15425 user defined types. */
15427 static struct type
*
15428 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15430 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
15432 struct attribute
*attr
;
15435 /* If the definition of this type lives in .debug_types, read that type.
15436 Don't follow DW_AT_specification though, that will take us back up
15437 the chain and we want to go down. */
15438 attr
= die
->attr (DW_AT_signature
);
15439 if (attr
!= nullptr)
15441 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15443 /* The type's CU may not be the same as CU.
15444 Ensure TYPE is recorded with CU in die_type_hash. */
15445 return set_die_type (die
, type
, cu
);
15448 type
= alloc_type (objfile
);
15449 INIT_CPLUS_SPECIFIC (type
);
15451 name
= dwarf2_name (die
, cu
);
15454 if (cu
->language
== language_cplus
15455 || cu
->language
== language_d
15456 || cu
->language
== language_rust
)
15458 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15460 /* dwarf2_full_name might have already finished building the DIE's
15461 type. If so, there is no need to continue. */
15462 if (get_die_type (die
, cu
) != NULL
)
15463 return get_die_type (die
, cu
);
15465 type
->set_name (full_name
);
15469 /* The name is already allocated along with this objfile, so
15470 we don't need to duplicate it for the type. */
15471 type
->set_name (name
);
15475 if (die
->tag
== DW_TAG_structure_type
)
15477 type
->set_code (TYPE_CODE_STRUCT
);
15479 else if (die
->tag
== DW_TAG_union_type
)
15481 type
->set_code (TYPE_CODE_UNION
);
15485 type
->set_code (TYPE_CODE_STRUCT
);
15488 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15489 TYPE_DECLARED_CLASS (type
) = 1;
15491 /* Store the calling convention in the type if it's available in
15492 the die. Otherwise the calling convention remains set to
15493 the default value DW_CC_normal. */
15494 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
15495 if (attr
!= nullptr
15496 && is_valid_DW_AT_calling_convention_for_type (DW_UNSND (attr
)))
15498 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15499 TYPE_CPLUS_CALLING_CONVENTION (type
)
15500 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
15503 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15504 if (attr
!= nullptr)
15506 if (attr
->form_is_constant ())
15507 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15510 struct dynamic_prop prop
;
15511 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, cu
->addr_type ()))
15512 type
->add_dyn_prop (DYN_PROP_BYTE_SIZE
, prop
);
15513 TYPE_LENGTH (type
) = 0;
15518 TYPE_LENGTH (type
) = 0;
15521 maybe_set_alignment (cu
, die
, type
);
15523 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15525 /* ICC<14 does not output the required DW_AT_declaration on
15526 incomplete types, but gives them a size of zero. */
15527 TYPE_STUB (type
) = 1;
15530 TYPE_STUB_SUPPORTED (type
) = 1;
15532 if (die_is_declaration (die
, cu
))
15533 TYPE_STUB (type
) = 1;
15534 else if (attr
== NULL
&& die
->child
== NULL
15535 && producer_is_realview (cu
->producer
))
15536 /* RealView does not output the required DW_AT_declaration
15537 on incomplete types. */
15538 TYPE_STUB (type
) = 1;
15540 /* We need to add the type field to the die immediately so we don't
15541 infinitely recurse when dealing with pointers to the structure
15542 type within the structure itself. */
15543 set_die_type (die
, type
, cu
);
15545 /* set_die_type should be already done. */
15546 set_descriptive_type (type
, die
, cu
);
15551 static void handle_struct_member_die
15552 (struct die_info
*child_die
,
15554 struct field_info
*fi
,
15555 std::vector
<struct symbol
*> *template_args
,
15556 struct dwarf2_cu
*cu
);
15558 /* A helper for handle_struct_member_die that handles
15559 DW_TAG_variant_part. */
15562 handle_variant_part (struct die_info
*die
, struct type
*type
,
15563 struct field_info
*fi
,
15564 std::vector
<struct symbol
*> *template_args
,
15565 struct dwarf2_cu
*cu
)
15567 variant_part_builder
*new_part
;
15568 if (fi
->current_variant_part
== nullptr)
15570 fi
->variant_parts
.emplace_back ();
15571 new_part
= &fi
->variant_parts
.back ();
15573 else if (!fi
->current_variant_part
->processing_variant
)
15575 complaint (_("nested DW_TAG_variant_part seen "
15576 "- DIE at %s [in module %s]"),
15577 sect_offset_str (die
->sect_off
),
15578 objfile_name (cu
->per_objfile
->objfile
));
15583 variant_field
¤t
= fi
->current_variant_part
->variants
.back ();
15584 current
.variant_parts
.emplace_back ();
15585 new_part
= ¤t
.variant_parts
.back ();
15588 /* When we recurse, we want callees to add to this new variant
15590 scoped_restore save_current_variant_part
15591 = make_scoped_restore (&fi
->current_variant_part
, new_part
);
15593 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15596 /* It's a univariant form, an extension we support. */
15598 else if (discr
->form_is_ref ())
15600 struct dwarf2_cu
*target_cu
= cu
;
15601 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15603 new_part
->discriminant_offset
= target_die
->sect_off
;
15607 complaint (_("DW_AT_discr does not have DIE reference form"
15608 " - DIE at %s [in module %s]"),
15609 sect_offset_str (die
->sect_off
),
15610 objfile_name (cu
->per_objfile
->objfile
));
15613 for (die_info
*child_die
= die
->child
;
15615 child_die
= child_die
->sibling
)
15616 handle_struct_member_die (child_die
, type
, fi
, template_args
, cu
);
15619 /* A helper for handle_struct_member_die that handles
15623 handle_variant (struct die_info
*die
, struct type
*type
,
15624 struct field_info
*fi
,
15625 std::vector
<struct symbol
*> *template_args
,
15626 struct dwarf2_cu
*cu
)
15628 if (fi
->current_variant_part
== nullptr)
15630 complaint (_("saw DW_TAG_variant outside DW_TAG_variant_part "
15631 "- DIE at %s [in module %s]"),
15632 sect_offset_str (die
->sect_off
),
15633 objfile_name (cu
->per_objfile
->objfile
));
15636 if (fi
->current_variant_part
->processing_variant
)
15638 complaint (_("nested DW_TAG_variant seen "
15639 "- DIE at %s [in module %s]"),
15640 sect_offset_str (die
->sect_off
),
15641 objfile_name (cu
->per_objfile
->objfile
));
15645 scoped_restore save_processing_variant
15646 = make_scoped_restore (&fi
->current_variant_part
->processing_variant
,
15649 fi
->current_variant_part
->variants
.emplace_back ();
15650 variant_field
&variant
= fi
->current_variant_part
->variants
.back ();
15651 variant
.first_field
= fi
->fields
.size ();
15653 /* In a variant we want to get the discriminant and also add a
15654 field for our sole member child. */
15655 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr_value
, cu
);
15656 if (discr
== nullptr)
15658 discr
= dwarf2_attr (die
, DW_AT_discr_list
, cu
);
15659 if (discr
== nullptr || DW_BLOCK (discr
)->size
== 0)
15660 variant
.default_branch
= true;
15662 variant
.discr_list_data
= DW_BLOCK (discr
);
15665 variant
.discriminant_value
= DW_UNSND (discr
);
15667 for (die_info
*variant_child
= die
->child
;
15668 variant_child
!= NULL
;
15669 variant_child
= variant_child
->sibling
)
15670 handle_struct_member_die (variant_child
, type
, fi
, template_args
, cu
);
15672 variant
.last_field
= fi
->fields
.size ();
15675 /* A helper for process_structure_scope that handles a single member
15679 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15680 struct field_info
*fi
,
15681 std::vector
<struct symbol
*> *template_args
,
15682 struct dwarf2_cu
*cu
)
15684 if (child_die
->tag
== DW_TAG_member
15685 || child_die
->tag
== DW_TAG_variable
)
15687 /* NOTE: carlton/2002-11-05: A C++ static data member
15688 should be a DW_TAG_member that is a declaration, but
15689 all versions of G++ as of this writing (so through at
15690 least 3.2.1) incorrectly generate DW_TAG_variable
15691 tags for them instead. */
15692 dwarf2_add_field (fi
, child_die
, cu
);
15694 else if (child_die
->tag
== DW_TAG_subprogram
)
15696 /* Rust doesn't have member functions in the C++ sense.
15697 However, it does emit ordinary functions as children
15698 of a struct DIE. */
15699 if (cu
->language
== language_rust
)
15700 read_func_scope (child_die
, cu
);
15703 /* C++ member function. */
15704 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15707 else if (child_die
->tag
== DW_TAG_inheritance
)
15709 /* C++ base class field. */
15710 dwarf2_add_field (fi
, child_die
, cu
);
15712 else if (type_can_define_types (child_die
))
15713 dwarf2_add_type_defn (fi
, child_die
, cu
);
15714 else if (child_die
->tag
== DW_TAG_template_type_param
15715 || child_die
->tag
== DW_TAG_template_value_param
)
15717 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15720 template_args
->push_back (arg
);
15722 else if (child_die
->tag
== DW_TAG_variant_part
)
15723 handle_variant_part (child_die
, type
, fi
, template_args
, cu
);
15724 else if (child_die
->tag
== DW_TAG_variant
)
15725 handle_variant (child_die
, type
, fi
, template_args
, cu
);
15728 /* Finish creating a structure or union type, including filling in
15729 its members and creating a symbol for it. */
15732 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15734 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
15735 struct die_info
*child_die
;
15738 type
= get_die_type (die
, cu
);
15740 type
= read_structure_type (die
, cu
);
15742 bool has_template_parameters
= false;
15743 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15745 struct field_info fi
;
15746 std::vector
<struct symbol
*> template_args
;
15748 child_die
= die
->child
;
15750 while (child_die
&& child_die
->tag
)
15752 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15753 child_die
= child_die
->sibling
;
15756 /* Attach template arguments to type. */
15757 if (!template_args
.empty ())
15759 has_template_parameters
= true;
15760 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15761 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15762 TYPE_TEMPLATE_ARGUMENTS (type
)
15763 = XOBNEWVEC (&objfile
->objfile_obstack
,
15765 TYPE_N_TEMPLATE_ARGUMENTS (type
));
15766 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
15767 template_args
.data (),
15768 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
15769 * sizeof (struct symbol
*)));
15772 /* Attach fields and member functions to the type. */
15773 if (fi
.nfields () > 0)
15774 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
15775 if (!fi
.fnfieldlists
.empty ())
15777 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
15779 /* Get the type which refers to the base class (possibly this
15780 class itself) which contains the vtable pointer for the current
15781 class from the DW_AT_containing_type attribute. This use of
15782 DW_AT_containing_type is a GNU extension. */
15784 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15786 struct type
*t
= die_containing_type (die
, cu
);
15788 set_type_vptr_basetype (type
, t
);
15793 /* Our own class provides vtbl ptr. */
15794 for (i
= t
->num_fields () - 1;
15795 i
>= TYPE_N_BASECLASSES (t
);
15798 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
15800 if (is_vtable_name (fieldname
, cu
))
15802 set_type_vptr_fieldno (type
, i
);
15807 /* Complain if virtual function table field not found. */
15808 if (i
< TYPE_N_BASECLASSES (t
))
15809 complaint (_("virtual function table pointer "
15810 "not found when defining class '%s'"),
15811 type
->name () ? type
->name () : "");
15815 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
15818 else if (cu
->producer
15819 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
15821 /* The IBM XLC compiler does not provide direct indication
15822 of the containing type, but the vtable pointer is
15823 always named __vfp. */
15827 for (i
= type
->num_fields () - 1;
15828 i
>= TYPE_N_BASECLASSES (type
);
15831 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
15833 set_type_vptr_fieldno (type
, i
);
15834 set_type_vptr_basetype (type
, type
);
15841 /* Copy fi.typedef_field_list linked list elements content into the
15842 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
15843 if (!fi
.typedef_field_list
.empty ())
15845 int count
= fi
.typedef_field_list
.size ();
15847 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15848 TYPE_TYPEDEF_FIELD_ARRAY (type
)
15849 = ((struct decl_field
*)
15851 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
15852 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
15854 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
15855 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
15858 /* Copy fi.nested_types_list linked list elements content into the
15859 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
15860 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
15862 int count
= fi
.nested_types_list
.size ();
15864 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15865 TYPE_NESTED_TYPES_ARRAY (type
)
15866 = ((struct decl_field
*)
15867 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
15868 TYPE_NESTED_TYPES_COUNT (type
) = count
;
15870 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
15871 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
15875 quirk_gcc_member_function_pointer (type
, objfile
);
15876 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
15877 cu
->rust_unions
.push_back (type
);
15879 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
15880 snapshots) has been known to create a die giving a declaration
15881 for a class that has, as a child, a die giving a definition for a
15882 nested class. So we have to process our children even if the
15883 current die is a declaration. Normally, of course, a declaration
15884 won't have any children at all. */
15886 child_die
= die
->child
;
15888 while (child_die
!= NULL
&& child_die
->tag
)
15890 if (child_die
->tag
== DW_TAG_member
15891 || child_die
->tag
== DW_TAG_variable
15892 || child_die
->tag
== DW_TAG_inheritance
15893 || child_die
->tag
== DW_TAG_template_value_param
15894 || child_die
->tag
== DW_TAG_template_type_param
)
15899 process_die (child_die
, cu
);
15901 child_die
= child_die
->sibling
;
15904 /* Do not consider external references. According to the DWARF standard,
15905 these DIEs are identified by the fact that they have no byte_size
15906 attribute, and a declaration attribute. */
15907 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
15908 || !die_is_declaration (die
, cu
)
15909 || dwarf2_attr (die
, DW_AT_signature
, cu
) != NULL
)
15911 struct symbol
*sym
= new_symbol (die
, type
, cu
);
15913 if (has_template_parameters
)
15915 struct symtab
*symtab
;
15916 if (sym
!= nullptr)
15917 symtab
= symbol_symtab (sym
);
15918 else if (cu
->line_header
!= nullptr)
15920 /* Any related symtab will do. */
15922 = cu
->line_header
->file_names ()[0].symtab
;
15927 complaint (_("could not find suitable "
15928 "symtab for template parameter"
15929 " - DIE at %s [in module %s]"),
15930 sect_offset_str (die
->sect_off
),
15931 objfile_name (objfile
));
15934 if (symtab
!= nullptr)
15936 /* Make sure that the symtab is set on the new symbols.
15937 Even though they don't appear in this symtab directly,
15938 other parts of gdb assume that symbols do, and this is
15939 reasonably true. */
15940 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
15941 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
), symtab
);
15947 /* Assuming DIE is an enumeration type, and TYPE is its associated
15948 type, update TYPE using some information only available in DIE's
15949 children. In particular, the fields are computed. */
15952 update_enumeration_type_from_children (struct die_info
*die
,
15954 struct dwarf2_cu
*cu
)
15956 struct die_info
*child_die
;
15957 int unsigned_enum
= 1;
15960 auto_obstack obstack
;
15961 std::vector
<struct field
> fields
;
15963 for (child_die
= die
->child
;
15964 child_die
!= NULL
&& child_die
->tag
;
15965 child_die
= child_die
->sibling
)
15967 struct attribute
*attr
;
15969 const gdb_byte
*bytes
;
15970 struct dwarf2_locexpr_baton
*baton
;
15973 if (child_die
->tag
!= DW_TAG_enumerator
)
15976 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
15980 name
= dwarf2_name (child_die
, cu
);
15982 name
= "<anonymous enumerator>";
15984 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
15985 &value
, &bytes
, &baton
);
15993 if (count_one_bits_ll (value
) >= 2)
15997 fields
.emplace_back ();
15998 struct field
&field
= fields
.back ();
15999 FIELD_NAME (field
) = dwarf2_physname (name
, child_die
, cu
);
16000 SET_FIELD_ENUMVAL (field
, value
);
16003 if (!fields
.empty ())
16005 type
->set_num_fields (fields
.size ());
16008 TYPE_ALLOC (type
, sizeof (struct field
) * fields
.size ()));
16009 memcpy (type
->fields (), fields
.data (),
16010 sizeof (struct field
) * fields
.size ());
16014 TYPE_UNSIGNED (type
) = 1;
16016 TYPE_FLAG_ENUM (type
) = 1;
16019 /* Given a DW_AT_enumeration_type die, set its type. We do not
16020 complete the type's fields yet, or create any symbols. */
16022 static struct type
*
16023 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16025 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16027 struct attribute
*attr
;
16030 /* If the definition of this type lives in .debug_types, read that type.
16031 Don't follow DW_AT_specification though, that will take us back up
16032 the chain and we want to go down. */
16033 attr
= die
->attr (DW_AT_signature
);
16034 if (attr
!= nullptr)
16036 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16038 /* The type's CU may not be the same as CU.
16039 Ensure TYPE is recorded with CU in die_type_hash. */
16040 return set_die_type (die
, type
, cu
);
16043 type
= alloc_type (objfile
);
16045 type
->set_code (TYPE_CODE_ENUM
);
16046 name
= dwarf2_full_name (NULL
, die
, cu
);
16048 type
->set_name (name
);
16050 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16053 struct type
*underlying_type
= die_type (die
, cu
);
16055 TYPE_TARGET_TYPE (type
) = underlying_type
;
16058 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16059 if (attr
!= nullptr)
16061 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16065 TYPE_LENGTH (type
) = 0;
16068 maybe_set_alignment (cu
, die
, type
);
16070 /* The enumeration DIE can be incomplete. In Ada, any type can be
16071 declared as private in the package spec, and then defined only
16072 inside the package body. Such types are known as Taft Amendment
16073 Types. When another package uses such a type, an incomplete DIE
16074 may be generated by the compiler. */
16075 if (die_is_declaration (die
, cu
))
16076 TYPE_STUB (type
) = 1;
16078 /* If this type has an underlying type that is not a stub, then we
16079 may use its attributes. We always use the "unsigned" attribute
16080 in this situation, because ordinarily we guess whether the type
16081 is unsigned -- but the guess can be wrong and the underlying type
16082 can tell us the reality. However, we defer to a local size
16083 attribute if one exists, because this lets the compiler override
16084 the underlying type if needed. */
16085 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16087 struct type
*underlying_type
= TYPE_TARGET_TYPE (type
);
16088 underlying_type
= check_typedef (underlying_type
);
16089 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (underlying_type
);
16090 if (TYPE_LENGTH (type
) == 0)
16091 TYPE_LENGTH (type
) = TYPE_LENGTH (underlying_type
);
16092 if (TYPE_RAW_ALIGN (type
) == 0
16093 && TYPE_RAW_ALIGN (underlying_type
) != 0)
16094 set_type_align (type
, TYPE_RAW_ALIGN (underlying_type
));
16097 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16099 set_die_type (die
, type
, cu
);
16101 /* Finish the creation of this type by using the enum's children.
16102 Note that, as usual, this must come after set_die_type to avoid
16103 infinite recursion when trying to compute the names of the
16105 update_enumeration_type_from_children (die
, type
, cu
);
16110 /* Given a pointer to a die which begins an enumeration, process all
16111 the dies that define the members of the enumeration, and create the
16112 symbol for the enumeration type.
16114 NOTE: We reverse the order of the element list. */
16117 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16119 struct type
*this_type
;
16121 this_type
= get_die_type (die
, cu
);
16122 if (this_type
== NULL
)
16123 this_type
= read_enumeration_type (die
, cu
);
16125 if (die
->child
!= NULL
)
16127 struct die_info
*child_die
;
16130 child_die
= die
->child
;
16131 while (child_die
&& child_die
->tag
)
16133 if (child_die
->tag
!= DW_TAG_enumerator
)
16135 process_die (child_die
, cu
);
16139 name
= dwarf2_name (child_die
, cu
);
16141 new_symbol (child_die
, this_type
, cu
);
16144 child_die
= child_die
->sibling
;
16148 /* If we are reading an enum from a .debug_types unit, and the enum
16149 is a declaration, and the enum is not the signatured type in the
16150 unit, then we do not want to add a symbol for it. Adding a
16151 symbol would in some cases obscure the true definition of the
16152 enum, giving users an incomplete type when the definition is
16153 actually available. Note that we do not want to do this for all
16154 enums which are just declarations, because C++0x allows forward
16155 enum declarations. */
16156 if (cu
->per_cu
->is_debug_types
16157 && die_is_declaration (die
, cu
))
16159 struct signatured_type
*sig_type
;
16161 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16162 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16163 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16167 new_symbol (die
, this_type
, cu
);
16170 /* Extract all information from a DW_TAG_array_type DIE and put it in
16171 the DIE's type field. For now, this only handles one dimensional
16174 static struct type
*
16175 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16177 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16178 struct die_info
*child_die
;
16180 struct type
*element_type
, *range_type
, *index_type
;
16181 struct attribute
*attr
;
16183 struct dynamic_prop
*byte_stride_prop
= NULL
;
16184 unsigned int bit_stride
= 0;
16186 element_type
= die_type (die
, cu
);
16188 /* The die_type call above may have already set the type for this DIE. */
16189 type
= get_die_type (die
, cu
);
16193 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16197 struct type
*prop_type
= cu
->addr_sized_int_type (false);
16200 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16201 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
,
16205 complaint (_("unable to read array DW_AT_byte_stride "
16206 " - DIE at %s [in module %s]"),
16207 sect_offset_str (die
->sect_off
),
16208 objfile_name (cu
->per_objfile
->objfile
));
16209 /* Ignore this attribute. We will likely not be able to print
16210 arrays of this type correctly, but there is little we can do
16211 to help if we cannot read the attribute's value. */
16212 byte_stride_prop
= NULL
;
16216 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16218 bit_stride
= DW_UNSND (attr
);
16220 /* Irix 6.2 native cc creates array types without children for
16221 arrays with unspecified length. */
16222 if (die
->child
== NULL
)
16224 index_type
= objfile_type (objfile
)->builtin_int
;
16225 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16226 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16227 byte_stride_prop
, bit_stride
);
16228 return set_die_type (die
, type
, cu
);
16231 std::vector
<struct type
*> range_types
;
16232 child_die
= die
->child
;
16233 while (child_die
&& child_die
->tag
)
16235 if (child_die
->tag
== DW_TAG_subrange_type
)
16237 struct type
*child_type
= read_type_die (child_die
, cu
);
16239 if (child_type
!= NULL
)
16241 /* The range type was succesfully read. Save it for the
16242 array type creation. */
16243 range_types
.push_back (child_type
);
16246 child_die
= child_die
->sibling
;
16249 /* Dwarf2 dimensions are output from left to right, create the
16250 necessary array types in backwards order. */
16252 type
= element_type
;
16254 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16258 while (i
< range_types
.size ())
16259 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16260 byte_stride_prop
, bit_stride
);
16264 size_t ndim
= range_types
.size ();
16266 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16267 byte_stride_prop
, bit_stride
);
16270 /* Understand Dwarf2 support for vector types (like they occur on
16271 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16272 array type. This is not part of the Dwarf2/3 standard yet, but a
16273 custom vendor extension. The main difference between a regular
16274 array and the vector variant is that vectors are passed by value
16276 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16277 if (attr
!= nullptr)
16278 make_vector_type (type
);
16280 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16281 implementation may choose to implement triple vectors using this
16283 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16284 if (attr
!= nullptr)
16286 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16287 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16289 complaint (_("DW_AT_byte_size for array type smaller "
16290 "than the total size of elements"));
16293 name
= dwarf2_name (die
, cu
);
16295 type
->set_name (name
);
16297 maybe_set_alignment (cu
, die
, type
);
16299 /* Install the type in the die. */
16300 set_die_type (die
, type
, cu
);
16302 /* set_die_type should be already done. */
16303 set_descriptive_type (type
, die
, cu
);
16308 static enum dwarf_array_dim_ordering
16309 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16311 struct attribute
*attr
;
16313 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16315 if (attr
!= nullptr)
16316 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16318 /* GNU F77 is a special case, as at 08/2004 array type info is the
16319 opposite order to the dwarf2 specification, but data is still
16320 laid out as per normal fortran.
16322 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16323 version checking. */
16325 if (cu
->language
== language_fortran
16326 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16328 return DW_ORD_row_major
;
16331 switch (cu
->language_defn
->la_array_ordering
)
16333 case array_column_major
:
16334 return DW_ORD_col_major
;
16335 case array_row_major
:
16337 return DW_ORD_row_major
;
16341 /* Extract all information from a DW_TAG_set_type DIE and put it in
16342 the DIE's type field. */
16344 static struct type
*
16345 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16347 struct type
*domain_type
, *set_type
;
16348 struct attribute
*attr
;
16350 domain_type
= die_type (die
, cu
);
16352 /* The die_type call above may have already set the type for this DIE. */
16353 set_type
= get_die_type (die
, cu
);
16357 set_type
= create_set_type (NULL
, domain_type
);
16359 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16360 if (attr
!= nullptr)
16361 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16363 maybe_set_alignment (cu
, die
, set_type
);
16365 return set_die_type (die
, set_type
, cu
);
16368 /* A helper for read_common_block that creates a locexpr baton.
16369 SYM is the symbol which we are marking as computed.
16370 COMMON_DIE is the DIE for the common block.
16371 COMMON_LOC is the location expression attribute for the common
16373 MEMBER_LOC is the location expression attribute for the particular
16374 member of the common block that we are processing.
16375 CU is the CU from which the above come. */
16378 mark_common_block_symbol_computed (struct symbol
*sym
,
16379 struct die_info
*common_die
,
16380 struct attribute
*common_loc
,
16381 struct attribute
*member_loc
,
16382 struct dwarf2_cu
*cu
)
16384 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
16385 struct objfile
*objfile
= per_objfile
->objfile
;
16386 struct dwarf2_locexpr_baton
*baton
;
16388 unsigned int cu_off
;
16389 enum bfd_endian byte_order
= gdbarch_byte_order (objfile
->arch ());
16390 LONGEST offset
= 0;
16392 gdb_assert (common_loc
&& member_loc
);
16393 gdb_assert (common_loc
->form_is_block ());
16394 gdb_assert (member_loc
->form_is_block ()
16395 || member_loc
->form_is_constant ());
16397 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16398 baton
->per_objfile
= per_objfile
;
16399 baton
->per_cu
= cu
->per_cu
;
16400 gdb_assert (baton
->per_cu
);
16402 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16404 if (member_loc
->form_is_constant ())
16406 offset
= member_loc
->constant_value (0);
16407 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16410 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16412 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16415 *ptr
++ = DW_OP_call4
;
16416 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16417 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16420 if (member_loc
->form_is_constant ())
16422 *ptr
++ = DW_OP_addr
;
16423 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16424 ptr
+= cu
->header
.addr_size
;
16428 /* We have to copy the data here, because DW_OP_call4 will only
16429 use a DW_AT_location attribute. */
16430 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16431 ptr
+= DW_BLOCK (member_loc
)->size
;
16434 *ptr
++ = DW_OP_plus
;
16435 gdb_assert (ptr
- baton
->data
== baton
->size
);
16437 SYMBOL_LOCATION_BATON (sym
) = baton
;
16438 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16441 /* Create appropriate locally-scoped variables for all the
16442 DW_TAG_common_block entries. Also create a struct common_block
16443 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16444 is used to separate the common blocks name namespace from regular
16448 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16450 struct attribute
*attr
;
16452 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16453 if (attr
!= nullptr)
16455 /* Support the .debug_loc offsets. */
16456 if (attr
->form_is_block ())
16460 else if (attr
->form_is_section_offset ())
16462 dwarf2_complex_location_expr_complaint ();
16467 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16468 "common block member");
16473 if (die
->child
!= NULL
)
16475 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16476 struct die_info
*child_die
;
16477 size_t n_entries
= 0, size
;
16478 struct common_block
*common_block
;
16479 struct symbol
*sym
;
16481 for (child_die
= die
->child
;
16482 child_die
&& child_die
->tag
;
16483 child_die
= child_die
->sibling
)
16486 size
= (sizeof (struct common_block
)
16487 + (n_entries
- 1) * sizeof (struct symbol
*));
16489 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16491 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16492 common_block
->n_entries
= 0;
16494 for (child_die
= die
->child
;
16495 child_die
&& child_die
->tag
;
16496 child_die
= child_die
->sibling
)
16498 /* Create the symbol in the DW_TAG_common_block block in the current
16500 sym
= new_symbol (child_die
, NULL
, cu
);
16503 struct attribute
*member_loc
;
16505 common_block
->contents
[common_block
->n_entries
++] = sym
;
16507 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16511 /* GDB has handled this for a long time, but it is
16512 not specified by DWARF. It seems to have been
16513 emitted by gfortran at least as recently as:
16514 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16515 complaint (_("Variable in common block has "
16516 "DW_AT_data_member_location "
16517 "- DIE at %s [in module %s]"),
16518 sect_offset_str (child_die
->sect_off
),
16519 objfile_name (objfile
));
16521 if (member_loc
->form_is_section_offset ())
16522 dwarf2_complex_location_expr_complaint ();
16523 else if (member_loc
->form_is_constant ()
16524 || member_loc
->form_is_block ())
16526 if (attr
!= nullptr)
16527 mark_common_block_symbol_computed (sym
, die
, attr
,
16531 dwarf2_complex_location_expr_complaint ();
16536 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16537 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16541 /* Create a type for a C++ namespace. */
16543 static struct type
*
16544 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16546 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16547 const char *previous_prefix
, *name
;
16551 /* For extensions, reuse the type of the original namespace. */
16552 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16554 struct die_info
*ext_die
;
16555 struct dwarf2_cu
*ext_cu
= cu
;
16557 ext_die
= dwarf2_extension (die
, &ext_cu
);
16558 type
= read_type_die (ext_die
, ext_cu
);
16560 /* EXT_CU may not be the same as CU.
16561 Ensure TYPE is recorded with CU in die_type_hash. */
16562 return set_die_type (die
, type
, cu
);
16565 name
= namespace_name (die
, &is_anonymous
, cu
);
16567 /* Now build the name of the current namespace. */
16569 previous_prefix
= determine_prefix (die
, cu
);
16570 if (previous_prefix
[0] != '\0')
16571 name
= typename_concat (&objfile
->objfile_obstack
,
16572 previous_prefix
, name
, 0, cu
);
16574 /* Create the type. */
16575 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16577 return set_die_type (die
, type
, cu
);
16580 /* Read a namespace scope. */
16583 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16585 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16588 /* Add a symbol associated to this if we haven't seen the namespace
16589 before. Also, add a using directive if it's an anonymous
16592 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16596 type
= read_type_die (die
, cu
);
16597 new_symbol (die
, type
, cu
);
16599 namespace_name (die
, &is_anonymous
, cu
);
16602 const char *previous_prefix
= determine_prefix (die
, cu
);
16604 std::vector
<const char *> excludes
;
16605 add_using_directive (using_directives (cu
),
16606 previous_prefix
, type
->name (), NULL
,
16607 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16611 if (die
->child
!= NULL
)
16613 struct die_info
*child_die
= die
->child
;
16615 while (child_die
&& child_die
->tag
)
16617 process_die (child_die
, cu
);
16618 child_die
= child_die
->sibling
;
16623 /* Read a Fortran module as type. This DIE can be only a declaration used for
16624 imported module. Still we need that type as local Fortran "use ... only"
16625 declaration imports depend on the created type in determine_prefix. */
16627 static struct type
*
16628 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16630 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16631 const char *module_name
;
16634 module_name
= dwarf2_name (die
, cu
);
16635 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16637 return set_die_type (die
, type
, cu
);
16640 /* Read a Fortran module. */
16643 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16645 struct die_info
*child_die
= die
->child
;
16648 type
= read_type_die (die
, cu
);
16649 new_symbol (die
, type
, cu
);
16651 while (child_die
&& child_die
->tag
)
16653 process_die (child_die
, cu
);
16654 child_die
= child_die
->sibling
;
16658 /* Return the name of the namespace represented by DIE. Set
16659 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16662 static const char *
16663 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16665 struct die_info
*current_die
;
16666 const char *name
= NULL
;
16668 /* Loop through the extensions until we find a name. */
16670 for (current_die
= die
;
16671 current_die
!= NULL
;
16672 current_die
= dwarf2_extension (die
, &cu
))
16674 /* We don't use dwarf2_name here so that we can detect the absence
16675 of a name -> anonymous namespace. */
16676 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16682 /* Is it an anonymous namespace? */
16684 *is_anonymous
= (name
== NULL
);
16686 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16691 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16692 the user defined type vector. */
16694 static struct type
*
16695 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16697 struct gdbarch
*gdbarch
= cu
->per_objfile
->objfile
->arch ();
16698 struct comp_unit_head
*cu_header
= &cu
->header
;
16700 struct attribute
*attr_byte_size
;
16701 struct attribute
*attr_address_class
;
16702 int byte_size
, addr_class
;
16703 struct type
*target_type
;
16705 target_type
= die_type (die
, cu
);
16707 /* The die_type call above may have already set the type for this DIE. */
16708 type
= get_die_type (die
, cu
);
16712 type
= lookup_pointer_type (target_type
);
16714 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16715 if (attr_byte_size
)
16716 byte_size
= DW_UNSND (attr_byte_size
);
16718 byte_size
= cu_header
->addr_size
;
16720 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16721 if (attr_address_class
)
16722 addr_class
= DW_UNSND (attr_address_class
);
16724 addr_class
= DW_ADDR_none
;
16726 ULONGEST alignment
= get_alignment (cu
, die
);
16728 /* If the pointer size, alignment, or address class is different
16729 than the default, create a type variant marked as such and set
16730 the length accordingly. */
16731 if (TYPE_LENGTH (type
) != byte_size
16732 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
16733 && alignment
!= TYPE_RAW_ALIGN (type
))
16734 || addr_class
!= DW_ADDR_none
)
16736 if (gdbarch_address_class_type_flags_p (gdbarch
))
16740 type_flags
= gdbarch_address_class_type_flags
16741 (gdbarch
, byte_size
, addr_class
);
16742 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16744 type
= make_type_with_address_space (type
, type_flags
);
16746 else if (TYPE_LENGTH (type
) != byte_size
)
16748 complaint (_("invalid pointer size %d"), byte_size
);
16750 else if (TYPE_RAW_ALIGN (type
) != alignment
)
16752 complaint (_("Invalid DW_AT_alignment"
16753 " - DIE at %s [in module %s]"),
16754 sect_offset_str (die
->sect_off
),
16755 objfile_name (cu
->per_objfile
->objfile
));
16759 /* Should we also complain about unhandled address classes? */
16763 TYPE_LENGTH (type
) = byte_size
;
16764 set_type_align (type
, alignment
);
16765 return set_die_type (die
, type
, cu
);
16768 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16769 the user defined type vector. */
16771 static struct type
*
16772 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16775 struct type
*to_type
;
16776 struct type
*domain
;
16778 to_type
= die_type (die
, cu
);
16779 domain
= die_containing_type (die
, cu
);
16781 /* The calls above may have already set the type for this DIE. */
16782 type
= get_die_type (die
, cu
);
16786 if (check_typedef (to_type
)->code () == TYPE_CODE_METHOD
)
16787 type
= lookup_methodptr_type (to_type
);
16788 else if (check_typedef (to_type
)->code () == TYPE_CODE_FUNC
)
16790 struct type
*new_type
= alloc_type (cu
->per_objfile
->objfile
);
16792 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
16793 to_type
->fields (), to_type
->num_fields (),
16794 TYPE_VARARGS (to_type
));
16795 type
= lookup_methodptr_type (new_type
);
16798 type
= lookup_memberptr_type (to_type
, domain
);
16800 return set_die_type (die
, type
, cu
);
16803 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
16804 the user defined type vector. */
16806 static struct type
*
16807 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16808 enum type_code refcode
)
16810 struct comp_unit_head
*cu_header
= &cu
->header
;
16811 struct type
*type
, *target_type
;
16812 struct attribute
*attr
;
16814 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
16816 target_type
= die_type (die
, cu
);
16818 /* The die_type call above may have already set the type for this DIE. */
16819 type
= get_die_type (die
, cu
);
16823 type
= lookup_reference_type (target_type
, refcode
);
16824 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16825 if (attr
!= nullptr)
16827 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16831 TYPE_LENGTH (type
) = cu_header
->addr_size
;
16833 maybe_set_alignment (cu
, die
, type
);
16834 return set_die_type (die
, type
, cu
);
16837 /* Add the given cv-qualifiers to the element type of the array. GCC
16838 outputs DWARF type qualifiers that apply to an array, not the
16839 element type. But GDB relies on the array element type to carry
16840 the cv-qualifiers. This mimics section 6.7.3 of the C99
16843 static struct type
*
16844 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16845 struct type
*base_type
, int cnst
, int voltl
)
16847 struct type
*el_type
, *inner_array
;
16849 base_type
= copy_type (base_type
);
16850 inner_array
= base_type
;
16852 while (TYPE_TARGET_TYPE (inner_array
)->code () == TYPE_CODE_ARRAY
)
16854 TYPE_TARGET_TYPE (inner_array
) =
16855 copy_type (TYPE_TARGET_TYPE (inner_array
));
16856 inner_array
= TYPE_TARGET_TYPE (inner_array
);
16859 el_type
= TYPE_TARGET_TYPE (inner_array
);
16860 cnst
|= TYPE_CONST (el_type
);
16861 voltl
|= TYPE_VOLATILE (el_type
);
16862 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
16864 return set_die_type (die
, base_type
, cu
);
16867 static struct type
*
16868 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16870 struct type
*base_type
, *cv_type
;
16872 base_type
= die_type (die
, cu
);
16874 /* The die_type call above may have already set the type for this DIE. */
16875 cv_type
= get_die_type (die
, cu
);
16879 /* In case the const qualifier is applied to an array type, the element type
16880 is so qualified, not the array type (section 6.7.3 of C99). */
16881 if (base_type
->code () == TYPE_CODE_ARRAY
)
16882 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
16884 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
16885 return set_die_type (die
, cv_type
, cu
);
16888 static struct type
*
16889 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16891 struct type
*base_type
, *cv_type
;
16893 base_type
= die_type (die
, cu
);
16895 /* The die_type call above may have already set the type for this DIE. */
16896 cv_type
= get_die_type (die
, cu
);
16900 /* In case the volatile qualifier is applied to an array type, the
16901 element type is so qualified, not the array type (section 6.7.3
16903 if (base_type
->code () == TYPE_CODE_ARRAY
)
16904 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
16906 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
16907 return set_die_type (die
, cv_type
, cu
);
16910 /* Handle DW_TAG_restrict_type. */
16912 static struct type
*
16913 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16915 struct type
*base_type
, *cv_type
;
16917 base_type
= die_type (die
, cu
);
16919 /* The die_type call above may have already set the type for this DIE. */
16920 cv_type
= get_die_type (die
, cu
);
16924 cv_type
= make_restrict_type (base_type
);
16925 return set_die_type (die
, cv_type
, cu
);
16928 /* Handle DW_TAG_atomic_type. */
16930 static struct type
*
16931 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16933 struct type
*base_type
, *cv_type
;
16935 base_type
= die_type (die
, cu
);
16937 /* The die_type call above may have already set the type for this DIE. */
16938 cv_type
= get_die_type (die
, cu
);
16942 cv_type
= make_atomic_type (base_type
);
16943 return set_die_type (die
, cv_type
, cu
);
16946 /* Extract all information from a DW_TAG_string_type DIE and add to
16947 the user defined type vector. It isn't really a user defined type,
16948 but it behaves like one, with other DIE's using an AT_user_def_type
16949 attribute to reference it. */
16951 static struct type
*
16952 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16954 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16955 struct gdbarch
*gdbarch
= objfile
->arch ();
16956 struct type
*type
, *range_type
, *index_type
, *char_type
;
16957 struct attribute
*attr
;
16958 struct dynamic_prop prop
;
16959 bool length_is_constant
= true;
16962 /* There are a couple of places where bit sizes might be made use of
16963 when parsing a DW_TAG_string_type, however, no producer that we know
16964 of make use of these. Handling bit sizes that are a multiple of the
16965 byte size is easy enough, but what about other bit sizes? Lets deal
16966 with that problem when we have to. Warn about these attributes being
16967 unsupported, then parse the type and ignore them like we always
16969 if (dwarf2_attr (die
, DW_AT_bit_size
, cu
) != nullptr
16970 || dwarf2_attr (die
, DW_AT_string_length_bit_size
, cu
) != nullptr)
16972 static bool warning_printed
= false;
16973 if (!warning_printed
)
16975 warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not "
16976 "currently supported on DW_TAG_string_type."));
16977 warning_printed
= true;
16981 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
16982 if (attr
!= nullptr && !attr
->form_is_constant ())
16984 /* The string length describes the location at which the length of
16985 the string can be found. The size of the length field can be
16986 specified with one of the attributes below. */
16987 struct type
*prop_type
;
16988 struct attribute
*len
16989 = dwarf2_attr (die
, DW_AT_string_length_byte_size
, cu
);
16990 if (len
== nullptr)
16991 len
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16992 if (len
!= nullptr && len
->form_is_constant ())
16994 /* Pass 0 as the default as we know this attribute is constant
16995 and the default value will not be returned. */
16996 LONGEST sz
= len
->constant_value (0);
16997 prop_type
= cu
->per_objfile
->int_type (sz
, true);
17001 /* If the size is not specified then we assume it is the size of
17002 an address on this target. */
17003 prop_type
= cu
->addr_sized_int_type (true);
17006 /* Convert the attribute into a dynamic property. */
17007 if (!attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
17010 length_is_constant
= false;
17012 else if (attr
!= nullptr)
17014 /* This DW_AT_string_length just contains the length with no
17015 indirection. There's no need to create a dynamic property in this
17016 case. Pass 0 for the default value as we know it will not be
17017 returned in this case. */
17018 length
= attr
->constant_value (0);
17020 else if ((attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
)) != nullptr)
17022 /* We don't currently support non-constant byte sizes for strings. */
17023 length
= attr
->constant_value (1);
17027 /* Use 1 as a fallback length if we have nothing else. */
17031 index_type
= objfile_type (objfile
)->builtin_int
;
17032 if (length_is_constant
)
17033 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17036 struct dynamic_prop low_bound
;
17038 low_bound
.kind
= PROP_CONST
;
17039 low_bound
.data
.const_val
= 1;
17040 range_type
= create_range_type (NULL
, index_type
, &low_bound
, &prop
, 0);
17042 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
17043 type
= create_string_type (NULL
, char_type
, range_type
);
17045 return set_die_type (die
, type
, cu
);
17048 /* Assuming that DIE corresponds to a function, returns nonzero
17049 if the function is prototyped. */
17052 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
17054 struct attribute
*attr
;
17056 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
17057 if (attr
&& (DW_UNSND (attr
) != 0))
17060 /* The DWARF standard implies that the DW_AT_prototyped attribute
17061 is only meaningful for C, but the concept also extends to other
17062 languages that allow unprototyped functions (Eg: Objective C).
17063 For all other languages, assume that functions are always
17065 if (cu
->language
!= language_c
17066 && cu
->language
!= language_objc
17067 && cu
->language
!= language_opencl
)
17070 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17071 prototyped and unprototyped functions; default to prototyped,
17072 since that is more common in modern code (and RealView warns
17073 about unprototyped functions). */
17074 if (producer_is_realview (cu
->producer
))
17080 /* Handle DIES due to C code like:
17084 int (*funcp)(int a, long l);
17088 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17090 static struct type
*
17091 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17093 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17094 struct type
*type
; /* Type that this function returns. */
17095 struct type
*ftype
; /* Function that returns above type. */
17096 struct attribute
*attr
;
17098 type
= die_type (die
, cu
);
17100 /* The die_type call above may have already set the type for this DIE. */
17101 ftype
= get_die_type (die
, cu
);
17105 ftype
= lookup_function_type (type
);
17107 if (prototyped_function_p (die
, cu
))
17108 TYPE_PROTOTYPED (ftype
) = 1;
17110 /* Store the calling convention in the type if it's available in
17111 the subroutine die. Otherwise set the calling convention to
17112 the default value DW_CC_normal. */
17113 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17114 if (attr
!= nullptr
17115 && is_valid_DW_AT_calling_convention_for_subroutine (DW_UNSND (attr
)))
17116 TYPE_CALLING_CONVENTION (ftype
)
17117 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
17118 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17119 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17121 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17123 /* Record whether the function returns normally to its caller or not
17124 if the DWARF producer set that information. */
17125 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17126 if (attr
&& (DW_UNSND (attr
) != 0))
17127 TYPE_NO_RETURN (ftype
) = 1;
17129 /* We need to add the subroutine type to the die immediately so
17130 we don't infinitely recurse when dealing with parameters
17131 declared as the same subroutine type. */
17132 set_die_type (die
, ftype
, cu
);
17134 if (die
->child
!= NULL
)
17136 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17137 struct die_info
*child_die
;
17138 int nparams
, iparams
;
17140 /* Count the number of parameters.
17141 FIXME: GDB currently ignores vararg functions, but knows about
17142 vararg member functions. */
17144 child_die
= die
->child
;
17145 while (child_die
&& child_die
->tag
)
17147 if (child_die
->tag
== DW_TAG_formal_parameter
)
17149 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17150 TYPE_VARARGS (ftype
) = 1;
17151 child_die
= child_die
->sibling
;
17154 /* Allocate storage for parameters and fill them in. */
17155 ftype
->set_num_fields (nparams
);
17157 ((struct field
*) TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
)));
17159 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17160 even if we error out during the parameters reading below. */
17161 for (iparams
= 0; iparams
< nparams
; iparams
++)
17162 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17165 child_die
= die
->child
;
17166 while (child_die
&& child_die
->tag
)
17168 if (child_die
->tag
== DW_TAG_formal_parameter
)
17170 struct type
*arg_type
;
17172 /* DWARF version 2 has no clean way to discern C++
17173 static and non-static member functions. G++ helps
17174 GDB by marking the first parameter for non-static
17175 member functions (which is the this pointer) as
17176 artificial. We pass this information to
17177 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17179 DWARF version 3 added DW_AT_object_pointer, which GCC
17180 4.5 does not yet generate. */
17181 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17182 if (attr
!= nullptr)
17183 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17185 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17186 arg_type
= die_type (child_die
, cu
);
17188 /* RealView does not mark THIS as const, which the testsuite
17189 expects. GCC marks THIS as const in method definitions,
17190 but not in the class specifications (GCC PR 43053). */
17191 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17192 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17195 struct dwarf2_cu
*arg_cu
= cu
;
17196 const char *name
= dwarf2_name (child_die
, cu
);
17198 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17199 if (attr
!= nullptr)
17201 /* If the compiler emits this, use it. */
17202 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17205 else if (name
&& strcmp (name
, "this") == 0)
17206 /* Function definitions will have the argument names. */
17208 else if (name
== NULL
&& iparams
== 0)
17209 /* Declarations may not have the names, so like
17210 elsewhere in GDB, assume an artificial first
17211 argument is "this". */
17215 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17219 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17222 child_die
= child_die
->sibling
;
17229 static struct type
*
17230 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17232 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17233 const char *name
= NULL
;
17234 struct type
*this_type
, *target_type
;
17236 name
= dwarf2_full_name (NULL
, die
, cu
);
17237 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17238 TYPE_TARGET_STUB (this_type
) = 1;
17239 set_die_type (die
, this_type
, cu
);
17240 target_type
= die_type (die
, cu
);
17241 if (target_type
!= this_type
)
17242 TYPE_TARGET_TYPE (this_type
) = target_type
;
17245 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17246 spec and cause infinite loops in GDB. */
17247 complaint (_("Self-referential DW_TAG_typedef "
17248 "- DIE at %s [in module %s]"),
17249 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17250 TYPE_TARGET_TYPE (this_type
) = NULL
;
17254 /* Gcc-7 and before supports -feliminate-dwarf2-dups, which generates
17255 anonymous typedefs, which is, strictly speaking, invalid DWARF.
17256 Handle these by just returning the target type, rather than
17257 constructing an anonymous typedef type and trying to handle this
17259 set_die_type (die
, target_type
, cu
);
17260 return target_type
;
17265 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17266 (which may be different from NAME) to the architecture back-end to allow
17267 it to guess the correct format if necessary. */
17269 static struct type
*
17270 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17271 const char *name_hint
, enum bfd_endian byte_order
)
17273 struct gdbarch
*gdbarch
= objfile
->arch ();
17274 const struct floatformat
**format
;
17277 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17279 type
= init_float_type (objfile
, bits
, name
, format
, byte_order
);
17281 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17286 /* Allocate an integer type of size BITS and name NAME. */
17288 static struct type
*
17289 dwarf2_init_integer_type (struct dwarf2_cu
*cu
, struct objfile
*objfile
,
17290 int bits
, int unsigned_p
, const char *name
)
17294 /* Versions of Intel's C Compiler generate an integer type called "void"
17295 instead of using DW_TAG_unspecified_type. This has been seen on
17296 at least versions 14, 17, and 18. */
17297 if (bits
== 0 && producer_is_icc (cu
) && name
!= nullptr
17298 && strcmp (name
, "void") == 0)
17299 type
= objfile_type (objfile
)->builtin_void
;
17301 type
= init_integer_type (objfile
, bits
, unsigned_p
, name
);
17306 /* Initialise and return a floating point type of size BITS suitable for
17307 use as a component of a complex number. The NAME_HINT is passed through
17308 when initialising the floating point type and is the name of the complex
17311 As DWARF doesn't currently provide an explicit name for the components
17312 of a complex number, but it can be helpful to have these components
17313 named, we try to select a suitable name based on the size of the
17315 static struct type
*
17316 dwarf2_init_complex_target_type (struct dwarf2_cu
*cu
,
17317 struct objfile
*objfile
,
17318 int bits
, const char *name_hint
,
17319 enum bfd_endian byte_order
)
17321 gdbarch
*gdbarch
= objfile
->arch ();
17322 struct type
*tt
= nullptr;
17324 /* Try to find a suitable floating point builtin type of size BITS.
17325 We're going to use the name of this type as the name for the complex
17326 target type that we are about to create. */
17327 switch (cu
->language
)
17329 case language_fortran
:
17333 tt
= builtin_f_type (gdbarch
)->builtin_real
;
17336 tt
= builtin_f_type (gdbarch
)->builtin_real_s8
;
17338 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17340 tt
= builtin_f_type (gdbarch
)->builtin_real_s16
;
17348 tt
= builtin_type (gdbarch
)->builtin_float
;
17351 tt
= builtin_type (gdbarch
)->builtin_double
;
17353 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17355 tt
= builtin_type (gdbarch
)->builtin_long_double
;
17361 /* If the type we found doesn't match the size we were looking for, then
17362 pretend we didn't find a type at all, the complex target type we
17363 create will then be nameless. */
17364 if (tt
!= nullptr && TYPE_LENGTH (tt
) * TARGET_CHAR_BIT
!= bits
)
17367 const char *name
= (tt
== nullptr) ? nullptr : tt
->name ();
17368 return dwarf2_init_float_type (objfile
, bits
, name
, name_hint
, byte_order
);
17371 /* Find a representation of a given base type and install
17372 it in the TYPE field of the die. */
17374 static struct type
*
17375 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17377 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17379 struct attribute
*attr
;
17380 int encoding
= 0, bits
= 0;
17384 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17385 if (attr
!= nullptr)
17386 encoding
= DW_UNSND (attr
);
17387 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17388 if (attr
!= nullptr)
17389 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17390 name
= dwarf2_name (die
, cu
);
17392 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
17394 arch
= objfile
->arch ();
17395 enum bfd_endian byte_order
= gdbarch_byte_order (arch
);
17397 attr
= dwarf2_attr (die
, DW_AT_endianity
, cu
);
17400 int endianity
= DW_UNSND (attr
);
17405 byte_order
= BFD_ENDIAN_BIG
;
17407 case DW_END_little
:
17408 byte_order
= BFD_ENDIAN_LITTLE
;
17411 complaint (_("DW_AT_endianity has unrecognized value %d"), endianity
);
17418 case DW_ATE_address
:
17419 /* Turn DW_ATE_address into a void * pointer. */
17420 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17421 type
= init_pointer_type (objfile
, bits
, name
, type
);
17423 case DW_ATE_boolean
:
17424 type
= init_boolean_type (objfile
, bits
, 1, name
);
17426 case DW_ATE_complex_float
:
17427 type
= dwarf2_init_complex_target_type (cu
, objfile
, bits
/ 2, name
,
17429 if (type
->code () == TYPE_CODE_ERROR
)
17431 if (name
== nullptr)
17433 struct obstack
*obstack
17434 = &cu
->per_objfile
->objfile
->objfile_obstack
;
17435 name
= obconcat (obstack
, "_Complex ", type
->name (),
17438 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17441 type
= init_complex_type (name
, type
);
17443 case DW_ATE_decimal_float
:
17444 type
= init_decfloat_type (objfile
, bits
, name
);
17447 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
, byte_order
);
17449 case DW_ATE_signed
:
17450 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17452 case DW_ATE_unsigned
:
17453 if (cu
->language
== language_fortran
17455 && startswith (name
, "character("))
17456 type
= init_character_type (objfile
, bits
, 1, name
);
17458 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17460 case DW_ATE_signed_char
:
17461 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17462 || cu
->language
== language_pascal
17463 || cu
->language
== language_fortran
)
17464 type
= init_character_type (objfile
, bits
, 0, name
);
17466 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17468 case DW_ATE_unsigned_char
:
17469 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17470 || cu
->language
== language_pascal
17471 || cu
->language
== language_fortran
17472 || cu
->language
== language_rust
)
17473 type
= init_character_type (objfile
, bits
, 1, name
);
17475 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17480 type
= builtin_type (arch
)->builtin_char16
;
17481 else if (bits
== 32)
17482 type
= builtin_type (arch
)->builtin_char32
;
17485 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
17487 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17489 return set_die_type (die
, type
, cu
);
17494 complaint (_("unsupported DW_AT_encoding: '%s'"),
17495 dwarf_type_encoding_name (encoding
));
17496 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17500 if (name
&& strcmp (name
, "char") == 0)
17501 TYPE_NOSIGN (type
) = 1;
17503 maybe_set_alignment (cu
, die
, type
);
17505 TYPE_ENDIANITY_NOT_DEFAULT (type
) = gdbarch_byte_order (arch
) != byte_order
;
17507 return set_die_type (die
, type
, cu
);
17510 /* Parse dwarf attribute if it's a block, reference or constant and put the
17511 resulting value of the attribute into struct bound_prop.
17512 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17515 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17516 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
,
17517 struct type
*default_type
)
17519 struct dwarf2_property_baton
*baton
;
17520 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
17521 struct objfile
*objfile
= per_objfile
->objfile
;
17522 struct obstack
*obstack
= &objfile
->objfile_obstack
;
17524 gdb_assert (default_type
!= NULL
);
17526 if (attr
== NULL
|| prop
== NULL
)
17529 if (attr
->form_is_block ())
17531 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17532 baton
->property_type
= default_type
;
17533 baton
->locexpr
.per_cu
= cu
->per_cu
;
17534 baton
->locexpr
.per_objfile
= per_objfile
;
17535 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17536 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17537 switch (attr
->name
)
17539 case DW_AT_string_length
:
17540 baton
->locexpr
.is_reference
= true;
17543 baton
->locexpr
.is_reference
= false;
17546 prop
->data
.baton
= baton
;
17547 prop
->kind
= PROP_LOCEXPR
;
17548 gdb_assert (prop
->data
.baton
!= NULL
);
17550 else if (attr
->form_is_ref ())
17552 struct dwarf2_cu
*target_cu
= cu
;
17553 struct die_info
*target_die
;
17554 struct attribute
*target_attr
;
17556 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17557 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17558 if (target_attr
== NULL
)
17559 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17561 if (target_attr
== NULL
)
17564 switch (target_attr
->name
)
17566 case DW_AT_location
:
17567 if (target_attr
->form_is_section_offset ())
17569 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17570 baton
->property_type
= die_type (target_die
, target_cu
);
17571 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17572 prop
->data
.baton
= baton
;
17573 prop
->kind
= PROP_LOCLIST
;
17574 gdb_assert (prop
->data
.baton
!= NULL
);
17576 else if (target_attr
->form_is_block ())
17578 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17579 baton
->property_type
= die_type (target_die
, target_cu
);
17580 baton
->locexpr
.per_cu
= cu
->per_cu
;
17581 baton
->locexpr
.per_objfile
= per_objfile
;
17582 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17583 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17584 baton
->locexpr
.is_reference
= true;
17585 prop
->data
.baton
= baton
;
17586 prop
->kind
= PROP_LOCEXPR
;
17587 gdb_assert (prop
->data
.baton
!= NULL
);
17591 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17592 "dynamic property");
17596 case DW_AT_data_member_location
:
17600 if (!handle_data_member_location (target_die
, target_cu
,
17604 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17605 baton
->property_type
= read_type_die (target_die
->parent
,
17607 baton
->offset_info
.offset
= offset
;
17608 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17609 prop
->data
.baton
= baton
;
17610 prop
->kind
= PROP_ADDR_OFFSET
;
17615 else if (attr
->form_is_constant ())
17617 prop
->data
.const_val
= attr
->constant_value (0);
17618 prop
->kind
= PROP_CONST
;
17622 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17623 dwarf2_name (die
, cu
));
17633 dwarf2_per_objfile::int_type (int size_in_bytes
, bool unsigned_p
) const
17635 struct type
*int_type
;
17637 /* Helper macro to examine the various builtin types. */
17638 #define TRY_TYPE(F) \
17639 int_type = (unsigned_p \
17640 ? objfile_type (objfile)->builtin_unsigned_ ## F \
17641 : objfile_type (objfile)->builtin_ ## F); \
17642 if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \
17649 TRY_TYPE (long_long
);
17653 gdb_assert_not_reached ("unable to find suitable integer type");
17659 dwarf2_cu::addr_sized_int_type (bool unsigned_p
) const
17661 int addr_size
= this->per_cu
->addr_size ();
17662 return this->per_objfile
->int_type (addr_size
, unsigned_p
);
17665 /* Read the DW_AT_type attribute for a sub-range. If this attribute is not
17666 present (which is valid) then compute the default type based on the
17667 compilation units address size. */
17669 static struct type
*
17670 read_subrange_index_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17672 struct type
*index_type
= die_type (die
, cu
);
17674 /* Dwarf-2 specifications explicitly allows to create subrange types
17675 without specifying a base type.
17676 In that case, the base type must be set to the type of
17677 the lower bound, upper bound or count, in that order, if any of these
17678 three attributes references an object that has a type.
17679 If no base type is found, the Dwarf-2 specifications say that
17680 a signed integer type of size equal to the size of an address should
17682 For the following C code: `extern char gdb_int [];'
17683 GCC produces an empty range DIE.
17684 FIXME: muller/2010-05-28: Possible references to object for low bound,
17685 high bound or count are not yet handled by this code. */
17686 if (index_type
->code () == TYPE_CODE_VOID
)
17687 index_type
= cu
->addr_sized_int_type (false);
17692 /* Read the given DW_AT_subrange DIE. */
17694 static struct type
*
17695 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17697 struct type
*base_type
, *orig_base_type
;
17698 struct type
*range_type
;
17699 struct attribute
*attr
;
17700 struct dynamic_prop low
, high
;
17701 int low_default_is_valid
;
17702 int high_bound_is_count
= 0;
17704 ULONGEST negative_mask
;
17706 orig_base_type
= read_subrange_index_type (die
, cu
);
17708 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17709 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17710 creating the range type, but we use the result of check_typedef
17711 when examining properties of the type. */
17712 base_type
= check_typedef (orig_base_type
);
17714 /* The die_type call above may have already set the type for this DIE. */
17715 range_type
= get_die_type (die
, cu
);
17719 low
.kind
= PROP_CONST
;
17720 high
.kind
= PROP_CONST
;
17721 high
.data
.const_val
= 0;
17723 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17724 omitting DW_AT_lower_bound. */
17725 switch (cu
->language
)
17728 case language_cplus
:
17729 low
.data
.const_val
= 0;
17730 low_default_is_valid
= 1;
17732 case language_fortran
:
17733 low
.data
.const_val
= 1;
17734 low_default_is_valid
= 1;
17737 case language_objc
:
17738 case language_rust
:
17739 low
.data
.const_val
= 0;
17740 low_default_is_valid
= (cu
->header
.version
>= 4);
17744 case language_pascal
:
17745 low
.data
.const_val
= 1;
17746 low_default_is_valid
= (cu
->header
.version
>= 4);
17749 low
.data
.const_val
= 0;
17750 low_default_is_valid
= 0;
17754 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17755 if (attr
!= nullptr)
17756 attr_to_dynamic_prop (attr
, die
, cu
, &low
, base_type
);
17757 else if (!low_default_is_valid
)
17758 complaint (_("Missing DW_AT_lower_bound "
17759 "- DIE at %s [in module %s]"),
17760 sect_offset_str (die
->sect_off
),
17761 objfile_name (cu
->per_objfile
->objfile
));
17763 struct attribute
*attr_ub
, *attr_count
;
17764 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17765 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17767 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
17768 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17770 /* If bounds are constant do the final calculation here. */
17771 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17772 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17774 high_bound_is_count
= 1;
17778 if (attr_ub
!= NULL
)
17779 complaint (_("Unresolved DW_AT_upper_bound "
17780 "- DIE at %s [in module %s]"),
17781 sect_offset_str (die
->sect_off
),
17782 objfile_name (cu
->per_objfile
->objfile
));
17783 if (attr_count
!= NULL
)
17784 complaint (_("Unresolved DW_AT_count "
17785 "- DIE at %s [in module %s]"),
17786 sect_offset_str (die
->sect_off
),
17787 objfile_name (cu
->per_objfile
->objfile
));
17792 struct attribute
*bias_attr
= dwarf2_attr (die
, DW_AT_GNU_bias
, cu
);
17793 if (bias_attr
!= nullptr && bias_attr
->form_is_constant ())
17794 bias
= bias_attr
->constant_value (0);
17796 /* Normally, the DWARF producers are expected to use a signed
17797 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17798 But this is unfortunately not always the case, as witnessed
17799 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17800 is used instead. To work around that ambiguity, we treat
17801 the bounds as signed, and thus sign-extend their values, when
17802 the base type is signed. */
17804 -((ULONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17805 if (low
.kind
== PROP_CONST
17806 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17807 low
.data
.const_val
|= negative_mask
;
17808 if (high
.kind
== PROP_CONST
17809 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17810 high
.data
.const_val
|= negative_mask
;
17812 /* Check for bit and byte strides. */
17813 struct dynamic_prop byte_stride_prop
;
17814 attribute
*attr_byte_stride
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
17815 if (attr_byte_stride
!= nullptr)
17817 struct type
*prop_type
= cu
->addr_sized_int_type (false);
17818 attr_to_dynamic_prop (attr_byte_stride
, die
, cu
, &byte_stride_prop
,
17822 struct dynamic_prop bit_stride_prop
;
17823 attribute
*attr_bit_stride
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
17824 if (attr_bit_stride
!= nullptr)
17826 /* It only makes sense to have either a bit or byte stride. */
17827 if (attr_byte_stride
!= nullptr)
17829 complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride "
17830 "- DIE at %s [in module %s]"),
17831 sect_offset_str (die
->sect_off
),
17832 objfile_name (cu
->per_objfile
->objfile
));
17833 attr_bit_stride
= nullptr;
17837 struct type
*prop_type
= cu
->addr_sized_int_type (false);
17838 attr_to_dynamic_prop (attr_bit_stride
, die
, cu
, &bit_stride_prop
,
17843 if (attr_byte_stride
!= nullptr
17844 || attr_bit_stride
!= nullptr)
17846 bool byte_stride_p
= (attr_byte_stride
!= nullptr);
17847 struct dynamic_prop
*stride
17848 = byte_stride_p
? &byte_stride_prop
: &bit_stride_prop
;
17851 = create_range_type_with_stride (NULL
, orig_base_type
, &low
,
17852 &high
, bias
, stride
, byte_stride_p
);
17855 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
, bias
);
17857 if (high_bound_is_count
)
17858 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17860 /* Ada expects an empty array on no boundary attributes. */
17861 if (attr
== NULL
&& cu
->language
!= language_ada
)
17862 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17864 name
= dwarf2_name (die
, cu
);
17866 range_type
->set_name (name
);
17868 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17869 if (attr
!= nullptr)
17870 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17872 maybe_set_alignment (cu
, die
, range_type
);
17874 set_die_type (die
, range_type
, cu
);
17876 /* set_die_type should be already done. */
17877 set_descriptive_type (range_type
, die
, cu
);
17882 static struct type
*
17883 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17887 type
= init_type (cu
->per_objfile
->objfile
, TYPE_CODE_VOID
, 0, NULL
);
17888 type
->set_name (dwarf2_name (die
, cu
));
17890 /* In Ada, an unspecified type is typically used when the description
17891 of the type is deferred to a different unit. When encountering
17892 such a type, we treat it as a stub, and try to resolve it later on,
17894 if (cu
->language
== language_ada
)
17895 TYPE_STUB (type
) = 1;
17897 return set_die_type (die
, type
, cu
);
17900 /* Read a single die and all its descendents. Set the die's sibling
17901 field to NULL; set other fields in the die correctly, and set all
17902 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17903 location of the info_ptr after reading all of those dies. PARENT
17904 is the parent of the die in question. */
17906 static struct die_info
*
17907 read_die_and_children (const struct die_reader_specs
*reader
,
17908 const gdb_byte
*info_ptr
,
17909 const gdb_byte
**new_info_ptr
,
17910 struct die_info
*parent
)
17912 struct die_info
*die
;
17913 const gdb_byte
*cur_ptr
;
17915 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, 0);
17918 *new_info_ptr
= cur_ptr
;
17921 store_in_ref_table (die
, reader
->cu
);
17923 if (die
->has_children
)
17924 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17928 *new_info_ptr
= cur_ptr
;
17931 die
->sibling
= NULL
;
17932 die
->parent
= parent
;
17936 /* Read a die, all of its descendents, and all of its siblings; set
17937 all of the fields of all of the dies correctly. Arguments are as
17938 in read_die_and_children. */
17940 static struct die_info
*
17941 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17942 const gdb_byte
*info_ptr
,
17943 const gdb_byte
**new_info_ptr
,
17944 struct die_info
*parent
)
17946 struct die_info
*first_die
, *last_sibling
;
17947 const gdb_byte
*cur_ptr
;
17949 cur_ptr
= info_ptr
;
17950 first_die
= last_sibling
= NULL
;
17954 struct die_info
*die
17955 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17959 *new_info_ptr
= cur_ptr
;
17966 last_sibling
->sibling
= die
;
17968 last_sibling
= die
;
17972 /* Read a die, all of its descendents, and all of its siblings; set
17973 all of the fields of all of the dies correctly. Arguments are as
17974 in read_die_and_children.
17975 This the main entry point for reading a DIE and all its children. */
17977 static struct die_info
*
17978 read_die_and_siblings (const struct die_reader_specs
*reader
,
17979 const gdb_byte
*info_ptr
,
17980 const gdb_byte
**new_info_ptr
,
17981 struct die_info
*parent
)
17983 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17984 new_info_ptr
, parent
);
17986 if (dwarf_die_debug
)
17988 fprintf_unfiltered (gdb_stdlog
,
17989 "Read die from %s@0x%x of %s:\n",
17990 reader
->die_section
->get_name (),
17991 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17992 bfd_get_filename (reader
->abfd
));
17993 dump_die (die
, dwarf_die_debug
);
17999 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
18001 The caller is responsible for filling in the extra attributes
18002 and updating (*DIEP)->num_attrs.
18003 Set DIEP to point to a newly allocated die with its information,
18004 except for its child, sibling, and parent fields. */
18006 static const gdb_byte
*
18007 read_full_die_1 (const struct die_reader_specs
*reader
,
18008 struct die_info
**diep
, const gdb_byte
*info_ptr
,
18009 int num_extra_attrs
)
18011 unsigned int abbrev_number
, bytes_read
, i
;
18012 struct abbrev_info
*abbrev
;
18013 struct die_info
*die
;
18014 struct dwarf2_cu
*cu
= reader
->cu
;
18015 bfd
*abfd
= reader
->abfd
;
18017 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
18018 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18019 info_ptr
+= bytes_read
;
18020 if (!abbrev_number
)
18026 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
18028 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
18030 bfd_get_filename (abfd
));
18032 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
18033 die
->sect_off
= sect_off
;
18034 die
->tag
= abbrev
->tag
;
18035 die
->abbrev
= abbrev_number
;
18036 die
->has_children
= abbrev
->has_children
;
18038 /* Make the result usable.
18039 The caller needs to update num_attrs after adding the extra
18041 die
->num_attrs
= abbrev
->num_attrs
;
18043 std::vector
<int> indexes_that_need_reprocess
;
18044 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
18046 bool need_reprocess
;
18048 read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
18049 info_ptr
, &need_reprocess
);
18050 if (need_reprocess
)
18051 indexes_that_need_reprocess
.push_back (i
);
18054 struct attribute
*attr
= die
->attr (DW_AT_str_offsets_base
);
18055 if (attr
!= nullptr)
18056 cu
->str_offsets_base
= DW_UNSND (attr
);
18058 attr
= die
->attr (DW_AT_loclists_base
);
18059 if (attr
!= nullptr)
18060 cu
->loclist_base
= DW_UNSND (attr
);
18062 auto maybe_addr_base
= die
->addr_base ();
18063 if (maybe_addr_base
.has_value ())
18064 cu
->addr_base
= *maybe_addr_base
;
18065 for (int index
: indexes_that_need_reprocess
)
18066 read_attribute_reprocess (reader
, &die
->attrs
[index
]);
18071 /* Read a die and all its attributes.
18072 Set DIEP to point to a newly allocated die with its information,
18073 except for its child, sibling, and parent fields. */
18075 static const gdb_byte
*
18076 read_full_die (const struct die_reader_specs
*reader
,
18077 struct die_info
**diep
, const gdb_byte
*info_ptr
)
18079 const gdb_byte
*result
;
18081 result
= read_full_die_1 (reader
, diep
, info_ptr
, 0);
18083 if (dwarf_die_debug
)
18085 fprintf_unfiltered (gdb_stdlog
,
18086 "Read die from %s@0x%x of %s:\n",
18087 reader
->die_section
->get_name (),
18088 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18089 bfd_get_filename (reader
->abfd
));
18090 dump_die (*diep
, dwarf_die_debug
);
18097 /* Returns nonzero if TAG represents a type that we might generate a partial
18101 is_type_tag_for_partial (int tag
)
18106 /* Some types that would be reasonable to generate partial symbols for,
18107 that we don't at present. */
18108 case DW_TAG_array_type
:
18109 case DW_TAG_file_type
:
18110 case DW_TAG_ptr_to_member_type
:
18111 case DW_TAG_set_type
:
18112 case DW_TAG_string_type
:
18113 case DW_TAG_subroutine_type
:
18115 case DW_TAG_base_type
:
18116 case DW_TAG_class_type
:
18117 case DW_TAG_interface_type
:
18118 case DW_TAG_enumeration_type
:
18119 case DW_TAG_structure_type
:
18120 case DW_TAG_subrange_type
:
18121 case DW_TAG_typedef
:
18122 case DW_TAG_union_type
:
18129 /* Load all DIEs that are interesting for partial symbols into memory. */
18131 static struct partial_die_info
*
18132 load_partial_dies (const struct die_reader_specs
*reader
,
18133 const gdb_byte
*info_ptr
, int building_psymtab
)
18135 struct dwarf2_cu
*cu
= reader
->cu
;
18136 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
18137 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18138 unsigned int bytes_read
;
18139 unsigned int load_all
= 0;
18140 int nesting_level
= 1;
18145 gdb_assert (cu
->per_cu
!= NULL
);
18146 if (cu
->per_cu
->load_all_dies
)
18150 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18154 &cu
->comp_unit_obstack
,
18155 hashtab_obstack_allocate
,
18156 dummy_obstack_deallocate
);
18160 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18162 /* A NULL abbrev means the end of a series of children. */
18163 if (abbrev
== NULL
)
18165 if (--nesting_level
== 0)
18168 info_ptr
+= bytes_read
;
18169 last_die
= parent_die
;
18170 parent_die
= parent_die
->die_parent
;
18174 /* Check for template arguments. We never save these; if
18175 they're seen, we just mark the parent, and go on our way. */
18176 if (parent_die
!= NULL
18177 && cu
->language
== language_cplus
18178 && (abbrev
->tag
== DW_TAG_template_type_param
18179 || abbrev
->tag
== DW_TAG_template_value_param
))
18181 parent_die
->has_template_arguments
= 1;
18185 /* We don't need a partial DIE for the template argument. */
18186 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18191 /* We only recurse into c++ subprograms looking for template arguments.
18192 Skip their other children. */
18194 && cu
->language
== language_cplus
18195 && parent_die
!= NULL
18196 && parent_die
->tag
== DW_TAG_subprogram
)
18198 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18202 /* Check whether this DIE is interesting enough to save. Normally
18203 we would not be interested in members here, but there may be
18204 later variables referencing them via DW_AT_specification (for
18205 static members). */
18207 && !is_type_tag_for_partial (abbrev
->tag
)
18208 && abbrev
->tag
!= DW_TAG_constant
18209 && abbrev
->tag
!= DW_TAG_enumerator
18210 && abbrev
->tag
!= DW_TAG_subprogram
18211 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18212 && abbrev
->tag
!= DW_TAG_lexical_block
18213 && abbrev
->tag
!= DW_TAG_variable
18214 && abbrev
->tag
!= DW_TAG_namespace
18215 && abbrev
->tag
!= DW_TAG_module
18216 && abbrev
->tag
!= DW_TAG_member
18217 && abbrev
->tag
!= DW_TAG_imported_unit
18218 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18220 /* Otherwise we skip to the next sibling, if any. */
18221 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18225 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18228 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18230 /* This two-pass algorithm for processing partial symbols has a
18231 high cost in cache pressure. Thus, handle some simple cases
18232 here which cover the majority of C partial symbols. DIEs
18233 which neither have specification tags in them, nor could have
18234 specification tags elsewhere pointing at them, can simply be
18235 processed and discarded.
18237 This segment is also optional; scan_partial_symbols and
18238 add_partial_symbol will handle these DIEs if we chain
18239 them in normally. When compilers which do not emit large
18240 quantities of duplicate debug information are more common,
18241 this code can probably be removed. */
18243 /* Any complete simple types at the top level (pretty much all
18244 of them, for a language without namespaces), can be processed
18246 if (parent_die
== NULL
18247 && pdi
.has_specification
== 0
18248 && pdi
.is_declaration
== 0
18249 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18250 || pdi
.tag
== DW_TAG_base_type
18251 || pdi
.tag
== DW_TAG_subrange_type
))
18253 if (building_psymtab
&& pdi
.name
!= NULL
)
18254 add_psymbol_to_list (pdi
.name
, false,
18255 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
18256 psymbol_placement::STATIC
,
18257 0, cu
->language
, objfile
);
18258 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18262 /* The exception for DW_TAG_typedef with has_children above is
18263 a workaround of GCC PR debug/47510. In the case of this complaint
18264 type_name_or_error will error on such types later.
18266 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18267 it could not find the child DIEs referenced later, this is checked
18268 above. In correct DWARF DW_TAG_typedef should have no children. */
18270 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18271 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18272 "- DIE at %s [in module %s]"),
18273 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18275 /* If we're at the second level, and we're an enumerator, and
18276 our parent has no specification (meaning possibly lives in a
18277 namespace elsewhere), then we can add the partial symbol now
18278 instead of queueing it. */
18279 if (pdi
.tag
== DW_TAG_enumerator
18280 && parent_die
!= NULL
18281 && parent_die
->die_parent
== NULL
18282 && parent_die
->tag
== DW_TAG_enumeration_type
18283 && parent_die
->has_specification
== 0)
18285 if (pdi
.name
== NULL
)
18286 complaint (_("malformed enumerator DIE ignored"));
18287 else if (building_psymtab
)
18288 add_psymbol_to_list (pdi
.name
, false,
18289 VAR_DOMAIN
, LOC_CONST
, -1,
18290 cu
->language
== language_cplus
18291 ? psymbol_placement::GLOBAL
18292 : psymbol_placement::STATIC
,
18293 0, cu
->language
, objfile
);
18295 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18299 struct partial_die_info
*part_die
18300 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18302 /* We'll save this DIE so link it in. */
18303 part_die
->die_parent
= parent_die
;
18304 part_die
->die_sibling
= NULL
;
18305 part_die
->die_child
= NULL
;
18307 if (last_die
&& last_die
== parent_die
)
18308 last_die
->die_child
= part_die
;
18310 last_die
->die_sibling
= part_die
;
18312 last_die
= part_die
;
18314 if (first_die
== NULL
)
18315 first_die
= part_die
;
18317 /* Maybe add the DIE to the hash table. Not all DIEs that we
18318 find interesting need to be in the hash table, because we
18319 also have the parent/sibling/child chains; only those that we
18320 might refer to by offset later during partial symbol reading.
18322 For now this means things that might have be the target of a
18323 DW_AT_specification, DW_AT_abstract_origin, or
18324 DW_AT_extension. DW_AT_extension will refer only to
18325 namespaces; DW_AT_abstract_origin refers to functions (and
18326 many things under the function DIE, but we do not recurse
18327 into function DIEs during partial symbol reading) and
18328 possibly variables as well; DW_AT_specification refers to
18329 declarations. Declarations ought to have the DW_AT_declaration
18330 flag. It happens that GCC forgets to put it in sometimes, but
18331 only for functions, not for types.
18333 Adding more things than necessary to the hash table is harmless
18334 except for the performance cost. Adding too few will result in
18335 wasted time in find_partial_die, when we reread the compilation
18336 unit with load_all_dies set. */
18339 || abbrev
->tag
== DW_TAG_constant
18340 || abbrev
->tag
== DW_TAG_subprogram
18341 || abbrev
->tag
== DW_TAG_variable
18342 || abbrev
->tag
== DW_TAG_namespace
18343 || part_die
->is_declaration
)
18347 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18348 to_underlying (part_die
->sect_off
),
18353 /* For some DIEs we want to follow their children (if any). For C
18354 we have no reason to follow the children of structures; for other
18355 languages we have to, so that we can get at method physnames
18356 to infer fully qualified class names, for DW_AT_specification,
18357 and for C++ template arguments. For C++, we also look one level
18358 inside functions to find template arguments (if the name of the
18359 function does not already contain the template arguments).
18361 For Ada and Fortran, we need to scan the children of subprograms
18362 and lexical blocks as well because these languages allow the
18363 definition of nested entities that could be interesting for the
18364 debugger, such as nested subprograms for instance. */
18365 if (last_die
->has_children
18367 || last_die
->tag
== DW_TAG_namespace
18368 || last_die
->tag
== DW_TAG_module
18369 || last_die
->tag
== DW_TAG_enumeration_type
18370 || (cu
->language
== language_cplus
18371 && last_die
->tag
== DW_TAG_subprogram
18372 && (last_die
->name
== NULL
18373 || strchr (last_die
->name
, '<') == NULL
))
18374 || (cu
->language
!= language_c
18375 && (last_die
->tag
== DW_TAG_class_type
18376 || last_die
->tag
== DW_TAG_interface_type
18377 || last_die
->tag
== DW_TAG_structure_type
18378 || last_die
->tag
== DW_TAG_union_type
))
18379 || ((cu
->language
== language_ada
18380 || cu
->language
== language_fortran
)
18381 && (last_die
->tag
== DW_TAG_subprogram
18382 || last_die
->tag
== DW_TAG_lexical_block
))))
18385 parent_die
= last_die
;
18389 /* Otherwise we skip to the next sibling, if any. */
18390 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18392 /* Back to the top, do it again. */
18396 partial_die_info::partial_die_info (sect_offset sect_off_
,
18397 struct abbrev_info
*abbrev
)
18398 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18402 /* Read a minimal amount of information into the minimal die structure.
18403 INFO_PTR should point just after the initial uleb128 of a DIE. */
18406 partial_die_info::read (const struct die_reader_specs
*reader
,
18407 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18409 struct dwarf2_cu
*cu
= reader
->cu
;
18410 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
18412 int has_low_pc_attr
= 0;
18413 int has_high_pc_attr
= 0;
18414 int high_pc_relative
= 0;
18416 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18419 bool need_reprocess
;
18420 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
],
18421 info_ptr
, &need_reprocess
);
18422 /* String and address offsets that need to do the reprocessing have
18423 already been read at this point, so there is no need to wait until
18424 the loop terminates to do the reprocessing. */
18425 if (need_reprocess
)
18426 read_attribute_reprocess (reader
, &attr
);
18427 /* Store the data if it is of an attribute we want to keep in a
18428 partial symbol table. */
18434 case DW_TAG_compile_unit
:
18435 case DW_TAG_partial_unit
:
18436 case DW_TAG_type_unit
:
18437 /* Compilation units have a DW_AT_name that is a filename, not
18438 a source language identifier. */
18439 case DW_TAG_enumeration_type
:
18440 case DW_TAG_enumerator
:
18441 /* These tags always have simple identifiers already; no need
18442 to canonicalize them. */
18443 name
= DW_STRING (&attr
);
18447 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18450 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
, objfile
);
18455 case DW_AT_linkage_name
:
18456 case DW_AT_MIPS_linkage_name
:
18457 /* Note that both forms of linkage name might appear. We
18458 assume they will be the same, and we only store the last
18460 linkage_name
= attr
.value_as_string ();
18461 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
18462 See https://github.com/rust-lang/rust/issues/32925. */
18463 if (cu
->language
== language_rust
&& linkage_name
!= NULL
18464 && strchr (linkage_name
, '{') != NULL
)
18465 linkage_name
= NULL
;
18468 has_low_pc_attr
= 1;
18469 lowpc
= attr
.value_as_address ();
18471 case DW_AT_high_pc
:
18472 has_high_pc_attr
= 1;
18473 highpc
= attr
.value_as_address ();
18474 if (cu
->header
.version
>= 4 && attr
.form_is_constant ())
18475 high_pc_relative
= 1;
18477 case DW_AT_location
:
18478 /* Support the .debug_loc offsets. */
18479 if (attr
.form_is_block ())
18481 d
.locdesc
= DW_BLOCK (&attr
);
18483 else if (attr
.form_is_section_offset ())
18485 dwarf2_complex_location_expr_complaint ();
18489 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18490 "partial symbol information");
18493 case DW_AT_external
:
18494 is_external
= DW_UNSND (&attr
);
18496 case DW_AT_declaration
:
18497 is_declaration
= DW_UNSND (&attr
);
18502 case DW_AT_abstract_origin
:
18503 case DW_AT_specification
:
18504 case DW_AT_extension
:
18505 has_specification
= 1;
18506 spec_offset
= attr
.get_ref_die_offset ();
18507 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18508 || cu
->per_cu
->is_dwz
);
18510 case DW_AT_sibling
:
18511 /* Ignore absolute siblings, they might point outside of
18512 the current compile unit. */
18513 if (attr
.form
== DW_FORM_ref_addr
)
18514 complaint (_("ignoring absolute DW_AT_sibling"));
18517 const gdb_byte
*buffer
= reader
->buffer
;
18518 sect_offset off
= attr
.get_ref_die_offset ();
18519 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18521 if (sibling_ptr
< info_ptr
)
18522 complaint (_("DW_AT_sibling points backwards"));
18523 else if (sibling_ptr
> reader
->buffer_end
)
18524 reader
->die_section
->overflow_complaint ();
18526 sibling
= sibling_ptr
;
18529 case DW_AT_byte_size
:
18532 case DW_AT_const_value
:
18533 has_const_value
= 1;
18535 case DW_AT_calling_convention
:
18536 /* DWARF doesn't provide a way to identify a program's source-level
18537 entry point. DW_AT_calling_convention attributes are only meant
18538 to describe functions' calling conventions.
18540 However, because it's a necessary piece of information in
18541 Fortran, and before DWARF 4 DW_CC_program was the only
18542 piece of debugging information whose definition refers to
18543 a 'main program' at all, several compilers marked Fortran
18544 main programs with DW_CC_program --- even when those
18545 functions use the standard calling conventions.
18547 Although DWARF now specifies a way to provide this
18548 information, we support this practice for backward
18550 if (DW_UNSND (&attr
) == DW_CC_program
18551 && cu
->language
== language_fortran
)
18552 main_subprogram
= 1;
18555 if (DW_UNSND (&attr
) == DW_INL_inlined
18556 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18557 may_be_inlined
= 1;
18561 if (tag
== DW_TAG_imported_unit
)
18563 d
.sect_off
= attr
.get_ref_die_offset ();
18564 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18565 || cu
->per_cu
->is_dwz
);
18569 case DW_AT_main_subprogram
:
18570 main_subprogram
= DW_UNSND (&attr
);
18575 /* It would be nice to reuse dwarf2_get_pc_bounds here,
18576 but that requires a full DIE, so instead we just
18578 int need_ranges_base
= tag
!= DW_TAG_compile_unit
;
18579 unsigned int ranges_offset
= (DW_UNSND (&attr
)
18580 + (need_ranges_base
18584 /* Value of the DW_AT_ranges attribute is the offset in the
18585 .debug_ranges section. */
18586 if (dwarf2_ranges_read (ranges_offset
, &lowpc
, &highpc
, cu
,
18597 /* For Ada, if both the name and the linkage name appear, we prefer
18598 the latter. This lets "catch exception" work better, regardless
18599 of the order in which the name and linkage name were emitted.
18600 Really, though, this is just a workaround for the fact that gdb
18601 doesn't store both the name and the linkage name. */
18602 if (cu
->language
== language_ada
&& linkage_name
!= nullptr)
18603 name
= linkage_name
;
18605 if (high_pc_relative
)
18608 if (has_low_pc_attr
&& has_high_pc_attr
)
18610 /* When using the GNU linker, .gnu.linkonce. sections are used to
18611 eliminate duplicate copies of functions and vtables and such.
18612 The linker will arbitrarily choose one and discard the others.
18613 The AT_*_pc values for such functions refer to local labels in
18614 these sections. If the section from that file was discarded, the
18615 labels are not in the output, so the relocs get a value of 0.
18616 If this is a discarded function, mark the pc bounds as invalid,
18617 so that GDB will ignore it. */
18618 if (lowpc
== 0 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
18620 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18621 struct gdbarch
*gdbarch
= objfile
->arch ();
18623 complaint (_("DW_AT_low_pc %s is zero "
18624 "for DIE at %s [in module %s]"),
18625 paddress (gdbarch
, lowpc
),
18626 sect_offset_str (sect_off
),
18627 objfile_name (objfile
));
18629 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18630 else if (lowpc
>= highpc
)
18632 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18633 struct gdbarch
*gdbarch
= objfile
->arch ();
18635 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18636 "for DIE at %s [in module %s]"),
18637 paddress (gdbarch
, lowpc
),
18638 paddress (gdbarch
, highpc
),
18639 sect_offset_str (sect_off
),
18640 objfile_name (objfile
));
18649 /* Find a cached partial DIE at OFFSET in CU. */
18651 struct partial_die_info
*
18652 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18654 struct partial_die_info
*lookup_die
= NULL
;
18655 struct partial_die_info
part_die (sect_off
);
18657 lookup_die
= ((struct partial_die_info
*)
18658 htab_find_with_hash (partial_dies
, &part_die
,
18659 to_underlying (sect_off
)));
18664 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18665 except in the case of .debug_types DIEs which do not reference
18666 outside their CU (they do however referencing other types via
18667 DW_FORM_ref_sig8). */
18669 static const struct cu_partial_die_info
18670 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18672 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
18673 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18674 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18675 struct partial_die_info
*pd
= NULL
;
18677 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18678 && cu
->header
.offset_in_cu_p (sect_off
))
18680 pd
= cu
->find_partial_die (sect_off
);
18683 /* We missed recording what we needed.
18684 Load all dies and try again. */
18685 per_cu
= cu
->per_cu
;
18689 /* TUs don't reference other CUs/TUs (except via type signatures). */
18690 if (cu
->per_cu
->is_debug_types
)
18692 error (_("Dwarf Error: Type Unit at offset %s contains"
18693 " external reference to offset %s [in module %s].\n"),
18694 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18695 bfd_get_filename (objfile
->obfd
));
18697 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18698 dwarf2_per_objfile
);
18700 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18701 load_partial_comp_unit (per_cu
, cu
->per_objfile
);
18703 per_cu
->cu
->last_used
= 0;
18704 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18707 /* If we didn't find it, and not all dies have been loaded,
18708 load them all and try again. */
18710 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18712 per_cu
->load_all_dies
= 1;
18714 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18715 THIS_CU->cu may already be in use. So we can't just free it and
18716 replace its DIEs with the ones we read in. Instead, we leave those
18717 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18718 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18720 load_partial_comp_unit (per_cu
, cu
->per_objfile
);
18722 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18726 internal_error (__FILE__
, __LINE__
,
18727 _("could not find partial DIE %s "
18728 "in cache [from module %s]\n"),
18729 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18730 return { per_cu
->cu
, pd
};
18733 /* See if we can figure out if the class lives in a namespace. We do
18734 this by looking for a member function; its demangled name will
18735 contain namespace info, if there is any. */
18738 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18739 struct dwarf2_cu
*cu
)
18741 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18742 what template types look like, because the demangler
18743 frequently doesn't give the same name as the debug info. We
18744 could fix this by only using the demangled name to get the
18745 prefix (but see comment in read_structure_type). */
18747 struct partial_die_info
*real_pdi
;
18748 struct partial_die_info
*child_pdi
;
18750 /* If this DIE (this DIE's specification, if any) has a parent, then
18751 we should not do this. We'll prepend the parent's fully qualified
18752 name when we create the partial symbol. */
18754 real_pdi
= struct_pdi
;
18755 while (real_pdi
->has_specification
)
18757 auto res
= find_partial_die (real_pdi
->spec_offset
,
18758 real_pdi
->spec_is_dwz
, cu
);
18759 real_pdi
= res
.pdi
;
18763 if (real_pdi
->die_parent
!= NULL
)
18766 for (child_pdi
= struct_pdi
->die_child
;
18768 child_pdi
= child_pdi
->die_sibling
)
18770 if (child_pdi
->tag
== DW_TAG_subprogram
18771 && child_pdi
->linkage_name
!= NULL
)
18773 gdb::unique_xmalloc_ptr
<char> actual_class_name
18774 (language_class_name_from_physname (cu
->language_defn
,
18775 child_pdi
->linkage_name
));
18776 if (actual_class_name
!= NULL
)
18778 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
18779 struct_pdi
->name
= objfile
->intern (actual_class_name
.get ());
18786 /* Return true if a DIE with TAG may have the DW_AT_const_value
18790 can_have_DW_AT_const_value_p (enum dwarf_tag tag
)
18794 case DW_TAG_constant
:
18795 case DW_TAG_enumerator
:
18796 case DW_TAG_formal_parameter
:
18797 case DW_TAG_template_value_param
:
18798 case DW_TAG_variable
:
18806 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18808 /* Once we've fixed up a die, there's no point in doing so again.
18809 This also avoids a memory leak if we were to call
18810 guess_partial_die_structure_name multiple times. */
18814 /* If we found a reference attribute and the DIE has no name, try
18815 to find a name in the referred to DIE. */
18817 if (name
== NULL
&& has_specification
)
18819 struct partial_die_info
*spec_die
;
18821 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18822 spec_die
= res
.pdi
;
18825 spec_die
->fixup (cu
);
18827 if (spec_die
->name
)
18829 name
= spec_die
->name
;
18831 /* Copy DW_AT_external attribute if it is set. */
18832 if (spec_die
->is_external
)
18833 is_external
= spec_die
->is_external
;
18837 if (!has_const_value
&& has_specification
18838 && can_have_DW_AT_const_value_p (tag
))
18840 struct partial_die_info
*spec_die
;
18842 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18843 spec_die
= res
.pdi
;
18846 spec_die
->fixup (cu
);
18848 if (spec_die
->has_const_value
)
18850 /* Copy DW_AT_const_value attribute if it is set. */
18851 has_const_value
= spec_die
->has_const_value
;
18855 /* Set default names for some unnamed DIEs. */
18857 if (name
== NULL
&& tag
== DW_TAG_namespace
)
18858 name
= CP_ANONYMOUS_NAMESPACE_STR
;
18860 /* If there is no parent die to provide a namespace, and there are
18861 children, see if we can determine the namespace from their linkage
18863 if (cu
->language
== language_cplus
18864 && !cu
->per_objfile
->per_bfd
->types
.empty ()
18865 && die_parent
== NULL
18867 && (tag
== DW_TAG_class_type
18868 || tag
== DW_TAG_structure_type
18869 || tag
== DW_TAG_union_type
))
18870 guess_partial_die_structure_name (this, cu
);
18872 /* GCC might emit a nameless struct or union that has a linkage
18873 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18875 && (tag
== DW_TAG_class_type
18876 || tag
== DW_TAG_interface_type
18877 || tag
== DW_TAG_structure_type
18878 || tag
== DW_TAG_union_type
)
18879 && linkage_name
!= NULL
)
18881 gdb::unique_xmalloc_ptr
<char> demangled
18882 (gdb_demangle (linkage_name
, DMGL_TYPES
));
18883 if (demangled
!= nullptr)
18887 /* Strip any leading namespaces/classes, keep only the base name.
18888 DW_AT_name for named DIEs does not contain the prefixes. */
18889 base
= strrchr (demangled
.get (), ':');
18890 if (base
&& base
> demangled
.get () && base
[-1] == ':')
18893 base
= demangled
.get ();
18895 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
18896 name
= objfile
->intern (base
);
18903 /* Read the .debug_loclists header contents from the given SECTION in the
18906 read_loclist_header (struct loclist_header
*header
,
18907 struct dwarf2_section_info
*section
)
18909 unsigned int bytes_read
;
18910 bfd
*abfd
= section
->get_bfd_owner ();
18911 const gdb_byte
*info_ptr
= section
->buffer
;
18912 header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
18913 info_ptr
+= bytes_read
;
18914 header
->version
= read_2_bytes (abfd
, info_ptr
);
18916 header
->addr_size
= read_1_byte (abfd
, info_ptr
);
18918 header
->segment_collector_size
= read_1_byte (abfd
, info_ptr
);
18920 header
->offset_entry_count
= read_4_bytes (abfd
, info_ptr
);
18923 /* Return the DW_AT_loclists_base value for the CU. */
18925 lookup_loclist_base (struct dwarf2_cu
*cu
)
18927 /* For the .dwo unit, the loclist_base points to the first offset following
18928 the header. The header consists of the following entities-
18929 1. Unit Length (4 bytes for 32 bit DWARF format, and 12 bytes for the 64
18931 2. version (2 bytes)
18932 3. address size (1 byte)
18933 4. segment selector size (1 byte)
18934 5. offset entry count (4 bytes)
18935 These sizes are derived as per the DWARFv5 standard. */
18936 if (cu
->dwo_unit
!= nullptr)
18938 if (cu
->header
.initial_length_size
== 4)
18939 return LOCLIST_HEADER_SIZE32
;
18940 return LOCLIST_HEADER_SIZE64
;
18942 return cu
->loclist_base
;
18945 /* Given a DW_FORM_loclistx value LOCLIST_INDEX, fetch the offset from the
18946 array of offsets in the .debug_loclists section. */
18948 read_loclist_index (struct dwarf2_cu
*cu
, ULONGEST loclist_index
)
18950 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
18951 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18952 bfd
*abfd
= objfile
->obfd
;
18953 ULONGEST loclist_base
= lookup_loclist_base (cu
);
18954 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
18956 section
->read (objfile
);
18957 if (section
->buffer
== NULL
)
18958 complaint (_("DW_FORM_loclistx used without .debug_loclists "
18959 "section [in module %s]"), objfile_name (objfile
));
18960 struct loclist_header header
;
18961 read_loclist_header (&header
, section
);
18962 if (loclist_index
>= header
.offset_entry_count
)
18963 complaint (_("DW_FORM_loclistx pointing outside of "
18964 ".debug_loclists offset array [in module %s]"),
18965 objfile_name (objfile
));
18966 if (loclist_base
+ loclist_index
* cu
->header
.offset_size
18968 complaint (_("DW_FORM_loclistx pointing outside of "
18969 ".debug_loclists section [in module %s]"),
18970 objfile_name (objfile
));
18971 const gdb_byte
*info_ptr
18972 = section
->buffer
+ loclist_base
+ loclist_index
* cu
->header
.offset_size
;
18974 if (cu
->header
.offset_size
== 4)
18975 return bfd_get_32 (abfd
, info_ptr
) + loclist_base
;
18977 return bfd_get_64 (abfd
, info_ptr
) + loclist_base
;
18980 /* Process the attributes that had to be skipped in the first round. These
18981 attributes are the ones that need str_offsets_base or addr_base attributes.
18982 They could not have been processed in the first round, because at the time
18983 the values of str_offsets_base or addr_base may not have been known. */
18985 read_attribute_reprocess (const struct die_reader_specs
*reader
,
18986 struct attribute
*attr
)
18988 struct dwarf2_cu
*cu
= reader
->cu
;
18989 switch (attr
->form
)
18991 case DW_FORM_addrx
:
18992 case DW_FORM_GNU_addr_index
:
18993 DW_ADDR (attr
) = read_addr_index (cu
, DW_UNSND (attr
));
18995 case DW_FORM_loclistx
:
18996 DW_UNSND (attr
) = read_loclist_index (cu
, DW_UNSND (attr
));
18999 case DW_FORM_strx1
:
19000 case DW_FORM_strx2
:
19001 case DW_FORM_strx3
:
19002 case DW_FORM_strx4
:
19003 case DW_FORM_GNU_str_index
:
19005 unsigned int str_index
= DW_UNSND (attr
);
19006 if (reader
->dwo_file
!= NULL
)
19008 DW_STRING (attr
) = read_dwo_str_index (reader
, str_index
);
19009 DW_STRING_IS_CANONICAL (attr
) = 0;
19013 DW_STRING (attr
) = read_stub_str_index (cu
, str_index
);
19014 DW_STRING_IS_CANONICAL (attr
) = 0;
19019 gdb_assert_not_reached (_("Unexpected DWARF form."));
19023 /* Read an attribute value described by an attribute form. */
19025 static const gdb_byte
*
19026 read_attribute_value (const struct die_reader_specs
*reader
,
19027 struct attribute
*attr
, unsigned form
,
19028 LONGEST implicit_const
, const gdb_byte
*info_ptr
,
19029 bool *need_reprocess
)
19031 struct dwarf2_cu
*cu
= reader
->cu
;
19032 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
19033 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19034 bfd
*abfd
= reader
->abfd
;
19035 struct comp_unit_head
*cu_header
= &cu
->header
;
19036 unsigned int bytes_read
;
19037 struct dwarf_block
*blk
;
19038 *need_reprocess
= false;
19040 attr
->form
= (enum dwarf_form
) form
;
19043 case DW_FORM_ref_addr
:
19044 if (cu
->header
.version
== 2)
19045 DW_UNSND (attr
) = cu
->header
.read_address (abfd
, info_ptr
,
19048 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
,
19050 info_ptr
+= bytes_read
;
19052 case DW_FORM_GNU_ref_alt
:
19053 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
, &bytes_read
);
19054 info_ptr
+= bytes_read
;
19058 struct gdbarch
*gdbarch
= objfile
->arch ();
19059 DW_ADDR (attr
) = cu
->header
.read_address (abfd
, info_ptr
, &bytes_read
);
19060 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
19061 info_ptr
+= bytes_read
;
19064 case DW_FORM_block2
:
19065 blk
= dwarf_alloc_block (cu
);
19066 blk
->size
= read_2_bytes (abfd
, info_ptr
);
19068 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19069 info_ptr
+= blk
->size
;
19070 DW_BLOCK (attr
) = blk
;
19072 case DW_FORM_block4
:
19073 blk
= dwarf_alloc_block (cu
);
19074 blk
->size
= read_4_bytes (abfd
, info_ptr
);
19076 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19077 info_ptr
+= blk
->size
;
19078 DW_BLOCK (attr
) = blk
;
19080 case DW_FORM_data2
:
19081 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
19084 case DW_FORM_data4
:
19085 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
19088 case DW_FORM_data8
:
19089 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
19092 case DW_FORM_data16
:
19093 blk
= dwarf_alloc_block (cu
);
19095 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
19097 DW_BLOCK (attr
) = blk
;
19099 case DW_FORM_sec_offset
:
19100 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
, &bytes_read
);
19101 info_ptr
+= bytes_read
;
19103 case DW_FORM_loclistx
:
19105 *need_reprocess
= true;
19106 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19107 info_ptr
+= bytes_read
;
19110 case DW_FORM_string
:
19111 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
19112 DW_STRING_IS_CANONICAL (attr
) = 0;
19113 info_ptr
+= bytes_read
;
19116 if (!cu
->per_cu
->is_dwz
)
19118 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
19119 abfd
, info_ptr
, cu_header
,
19121 DW_STRING_IS_CANONICAL (attr
) = 0;
19122 info_ptr
+= bytes_read
;
19126 case DW_FORM_line_strp
:
19127 if (!cu
->per_cu
->is_dwz
)
19130 = dwarf2_per_objfile
->read_line_string (info_ptr
, cu_header
,
19132 DW_STRING_IS_CANONICAL (attr
) = 0;
19133 info_ptr
+= bytes_read
;
19137 case DW_FORM_GNU_strp_alt
:
19139 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
->per_bfd
);
19140 LONGEST str_offset
= cu_header
->read_offset (abfd
, info_ptr
,
19143 DW_STRING (attr
) = dwz
->read_string (objfile
, str_offset
);
19144 DW_STRING_IS_CANONICAL (attr
) = 0;
19145 info_ptr
+= bytes_read
;
19148 case DW_FORM_exprloc
:
19149 case DW_FORM_block
:
19150 blk
= dwarf_alloc_block (cu
);
19151 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19152 info_ptr
+= bytes_read
;
19153 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19154 info_ptr
+= blk
->size
;
19155 DW_BLOCK (attr
) = blk
;
19157 case DW_FORM_block1
:
19158 blk
= dwarf_alloc_block (cu
);
19159 blk
->size
= read_1_byte (abfd
, info_ptr
);
19161 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19162 info_ptr
+= blk
->size
;
19163 DW_BLOCK (attr
) = blk
;
19165 case DW_FORM_data1
:
19166 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19170 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19173 case DW_FORM_flag_present
:
19174 DW_UNSND (attr
) = 1;
19176 case DW_FORM_sdata
:
19177 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19178 info_ptr
+= bytes_read
;
19180 case DW_FORM_udata
:
19181 case DW_FORM_rnglistx
:
19182 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19183 info_ptr
+= bytes_read
;
19186 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19187 + read_1_byte (abfd
, info_ptr
));
19191 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19192 + read_2_bytes (abfd
, info_ptr
));
19196 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19197 + read_4_bytes (abfd
, info_ptr
));
19201 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19202 + read_8_bytes (abfd
, info_ptr
));
19205 case DW_FORM_ref_sig8
:
19206 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19209 case DW_FORM_ref_udata
:
19210 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19211 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19212 info_ptr
+= bytes_read
;
19214 case DW_FORM_indirect
:
19215 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19216 info_ptr
+= bytes_read
;
19217 if (form
== DW_FORM_implicit_const
)
19219 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19220 info_ptr
+= bytes_read
;
19222 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19223 info_ptr
, need_reprocess
);
19225 case DW_FORM_implicit_const
:
19226 DW_SND (attr
) = implicit_const
;
19228 case DW_FORM_addrx
:
19229 case DW_FORM_GNU_addr_index
:
19230 *need_reprocess
= true;
19231 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19232 info_ptr
+= bytes_read
;
19235 case DW_FORM_strx1
:
19236 case DW_FORM_strx2
:
19237 case DW_FORM_strx3
:
19238 case DW_FORM_strx4
:
19239 case DW_FORM_GNU_str_index
:
19241 ULONGEST str_index
;
19242 if (form
== DW_FORM_strx1
)
19244 str_index
= read_1_byte (abfd
, info_ptr
);
19247 else if (form
== DW_FORM_strx2
)
19249 str_index
= read_2_bytes (abfd
, info_ptr
);
19252 else if (form
== DW_FORM_strx3
)
19254 str_index
= read_3_bytes (abfd
, info_ptr
);
19257 else if (form
== DW_FORM_strx4
)
19259 str_index
= read_4_bytes (abfd
, info_ptr
);
19264 str_index
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19265 info_ptr
+= bytes_read
;
19267 *need_reprocess
= true;
19268 DW_UNSND (attr
) = str_index
;
19272 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19273 dwarf_form_name (form
),
19274 bfd_get_filename (abfd
));
19278 if (cu
->per_cu
->is_dwz
&& attr
->form_is_ref ())
19279 attr
->form
= DW_FORM_GNU_ref_alt
;
19281 /* We have seen instances where the compiler tried to emit a byte
19282 size attribute of -1 which ended up being encoded as an unsigned
19283 0xffffffff. Although 0xffffffff is technically a valid size value,
19284 an object of this size seems pretty unlikely so we can relatively
19285 safely treat these cases as if the size attribute was invalid and
19286 treat them as zero by default. */
19287 if (attr
->name
== DW_AT_byte_size
19288 && form
== DW_FORM_data4
19289 && DW_UNSND (attr
) >= 0xffffffff)
19292 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19293 hex_string (DW_UNSND (attr
)));
19294 DW_UNSND (attr
) = 0;
19300 /* Read an attribute described by an abbreviated attribute. */
19302 static const gdb_byte
*
19303 read_attribute (const struct die_reader_specs
*reader
,
19304 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19305 const gdb_byte
*info_ptr
, bool *need_reprocess
)
19307 attr
->name
= abbrev
->name
;
19308 return read_attribute_value (reader
, attr
, abbrev
->form
,
19309 abbrev
->implicit_const
, info_ptr
,
19313 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19315 static const char *
19316 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19317 LONGEST str_offset
)
19319 return dwarf2_per_objfile
->per_bfd
->str
.read_string
19320 (dwarf2_per_objfile
->objfile
, str_offset
, "DW_FORM_strp");
19323 /* Return pointer to string at .debug_str offset as read from BUF.
19324 BUF is assumed to be in a compilation unit described by CU_HEADER.
19325 Return *BYTES_READ_PTR count of bytes read from BUF. */
19327 static const char *
19328 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19329 const gdb_byte
*buf
,
19330 const struct comp_unit_head
*cu_header
,
19331 unsigned int *bytes_read_ptr
)
19333 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
19335 return read_indirect_string_at_offset (dwarf2_per_objfile
, str_offset
);
19341 dwarf2_per_objfile::read_line_string (const gdb_byte
*buf
,
19342 const struct comp_unit_head
*cu_header
,
19343 unsigned int *bytes_read_ptr
)
19345 bfd
*abfd
= objfile
->obfd
;
19346 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
19348 return per_bfd
->line_str
.read_string (objfile
, str_offset
, "DW_FORM_line_strp");
19351 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19352 ADDR_BASE is the DW_AT_addr_base (DW_AT_GNU_addr_base) attribute or zero.
19353 ADDR_SIZE is the size of addresses from the CU header. */
19356 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19357 unsigned int addr_index
, gdb::optional
<ULONGEST
> addr_base
,
19360 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19361 bfd
*abfd
= objfile
->obfd
;
19362 const gdb_byte
*info_ptr
;
19363 ULONGEST addr_base_or_zero
= addr_base
.has_value () ? *addr_base
: 0;
19365 dwarf2_per_objfile
->per_bfd
->addr
.read (objfile
);
19366 if (dwarf2_per_objfile
->per_bfd
->addr
.buffer
== NULL
)
19367 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19368 objfile_name (objfile
));
19369 if (addr_base_or_zero
+ addr_index
* addr_size
19370 >= dwarf2_per_objfile
->per_bfd
->addr
.size
)
19371 error (_("DW_FORM_addr_index pointing outside of "
19372 ".debug_addr section [in module %s]"),
19373 objfile_name (objfile
));
19374 info_ptr
= (dwarf2_per_objfile
->per_bfd
->addr
.buffer
19375 + addr_base_or_zero
+ addr_index
* addr_size
);
19376 if (addr_size
== 4)
19377 return bfd_get_32 (abfd
, info_ptr
);
19379 return bfd_get_64 (abfd
, info_ptr
);
19382 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19385 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19387 return read_addr_index_1 (cu
->per_objfile
, addr_index
,
19388 cu
->addr_base
, cu
->header
.addr_size
);
19391 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19394 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19395 unsigned int *bytes_read
)
19397 bfd
*abfd
= cu
->per_objfile
->objfile
->obfd
;
19398 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19400 return read_addr_index (cu
, addr_index
);
19406 dwarf2_read_addr_index (dwarf2_per_cu_data
*per_cu
,
19407 dwarf2_per_objfile
*dwarf2_per_objfile
,
19408 unsigned int addr_index
)
19410 struct dwarf2_cu
*cu
= per_cu
->cu
;
19411 gdb::optional
<ULONGEST
> addr_base
;
19414 /* We need addr_base and addr_size.
19415 If we don't have PER_CU->cu, we have to get it.
19416 Nasty, but the alternative is storing the needed info in PER_CU,
19417 which at this point doesn't seem justified: it's not clear how frequently
19418 it would get used and it would increase the size of every PER_CU.
19419 Entry points like dwarf2_per_cu_addr_size do a similar thing
19420 so we're not in uncharted territory here.
19421 Alas we need to be a bit more complicated as addr_base is contained
19424 We don't need to read the entire CU(/TU).
19425 We just need the header and top level die.
19427 IWBN to use the aging mechanism to let us lazily later discard the CU.
19428 For now we skip this optimization. */
19432 addr_base
= cu
->addr_base
;
19433 addr_size
= cu
->header
.addr_size
;
19437 cutu_reader
reader (per_cu
, dwarf2_per_objfile
, NULL
, 0, false);
19438 addr_base
= reader
.cu
->addr_base
;
19439 addr_size
= reader
.cu
->header
.addr_size
;
19442 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19446 /* Given a DW_FORM_GNU_str_index value STR_INDEX, fetch the string.
19447 STR_SECTION, STR_OFFSETS_SECTION can be from a Fission stub or a
19450 static const char *
19451 read_str_index (struct dwarf2_cu
*cu
,
19452 struct dwarf2_section_info
*str_section
,
19453 struct dwarf2_section_info
*str_offsets_section
,
19454 ULONGEST str_offsets_base
, ULONGEST str_index
)
19456 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
19457 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19458 const char *objf_name
= objfile_name (objfile
);
19459 bfd
*abfd
= objfile
->obfd
;
19460 const gdb_byte
*info_ptr
;
19461 ULONGEST str_offset
;
19462 static const char form_name
[] = "DW_FORM_GNU_str_index or DW_FORM_strx";
19464 str_section
->read (objfile
);
19465 str_offsets_section
->read (objfile
);
19466 if (str_section
->buffer
== NULL
)
19467 error (_("%s used without %s section"
19468 " in CU at offset %s [in module %s]"),
19469 form_name
, str_section
->get_name (),
19470 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19471 if (str_offsets_section
->buffer
== NULL
)
19472 error (_("%s used without %s section"
19473 " in CU at offset %s [in module %s]"),
19474 form_name
, str_section
->get_name (),
19475 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19476 info_ptr
= (str_offsets_section
->buffer
19478 + str_index
* cu
->header
.offset_size
);
19479 if (cu
->header
.offset_size
== 4)
19480 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19482 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19483 if (str_offset
>= str_section
->size
)
19484 error (_("Offset from %s pointing outside of"
19485 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19486 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19487 return (const char *) (str_section
->buffer
+ str_offset
);
19490 /* Given a DW_FORM_GNU_str_index from a DWO file, fetch the string. */
19492 static const char *
19493 read_dwo_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19495 ULONGEST str_offsets_base
= reader
->cu
->header
.version
>= 5
19496 ? reader
->cu
->header
.addr_size
: 0;
19497 return read_str_index (reader
->cu
,
19498 &reader
->dwo_file
->sections
.str
,
19499 &reader
->dwo_file
->sections
.str_offsets
,
19500 str_offsets_base
, str_index
);
19503 /* Given a DW_FORM_GNU_str_index from a Fission stub, fetch the string. */
19505 static const char *
19506 read_stub_str_index (struct dwarf2_cu
*cu
, ULONGEST str_index
)
19508 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
19509 const char *objf_name
= objfile_name (objfile
);
19510 static const char form_name
[] = "DW_FORM_GNU_str_index";
19511 static const char str_offsets_attr_name
[] = "DW_AT_str_offsets";
19513 if (!cu
->str_offsets_base
.has_value ())
19514 error (_("%s used in Fission stub without %s"
19515 " in CU at offset 0x%lx [in module %s]"),
19516 form_name
, str_offsets_attr_name
,
19517 (long) cu
->header
.offset_size
, objf_name
);
19519 return read_str_index (cu
,
19520 &cu
->per_objfile
->per_bfd
->str
,
19521 &cu
->per_objfile
->per_bfd
->str_offsets
,
19522 *cu
->str_offsets_base
, str_index
);
19525 /* Return the length of an LEB128 number in BUF. */
19528 leb128_size (const gdb_byte
*buf
)
19530 const gdb_byte
*begin
= buf
;
19536 if ((byte
& 128) == 0)
19537 return buf
- begin
;
19542 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19551 cu
->language
= language_c
;
19554 case DW_LANG_C_plus_plus
:
19555 case DW_LANG_C_plus_plus_11
:
19556 case DW_LANG_C_plus_plus_14
:
19557 cu
->language
= language_cplus
;
19560 cu
->language
= language_d
;
19562 case DW_LANG_Fortran77
:
19563 case DW_LANG_Fortran90
:
19564 case DW_LANG_Fortran95
:
19565 case DW_LANG_Fortran03
:
19566 case DW_LANG_Fortran08
:
19567 cu
->language
= language_fortran
;
19570 cu
->language
= language_go
;
19572 case DW_LANG_Mips_Assembler
:
19573 cu
->language
= language_asm
;
19575 case DW_LANG_Ada83
:
19576 case DW_LANG_Ada95
:
19577 cu
->language
= language_ada
;
19579 case DW_LANG_Modula2
:
19580 cu
->language
= language_m2
;
19582 case DW_LANG_Pascal83
:
19583 cu
->language
= language_pascal
;
19586 cu
->language
= language_objc
;
19589 case DW_LANG_Rust_old
:
19590 cu
->language
= language_rust
;
19592 case DW_LANG_Cobol74
:
19593 case DW_LANG_Cobol85
:
19595 cu
->language
= language_minimal
;
19598 cu
->language_defn
= language_def (cu
->language
);
19601 /* Return the named attribute or NULL if not there. */
19603 static struct attribute
*
19604 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19609 struct attribute
*spec
= NULL
;
19611 for (i
= 0; i
< die
->num_attrs
; ++i
)
19613 if (die
->attrs
[i
].name
== name
)
19614 return &die
->attrs
[i
];
19615 if (die
->attrs
[i
].name
== DW_AT_specification
19616 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19617 spec
= &die
->attrs
[i
];
19623 die
= follow_die_ref (die
, spec
, &cu
);
19629 /* Return the string associated with a string-typed attribute, or NULL if it
19630 is either not found or is of an incorrect type. */
19632 static const char *
19633 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19635 struct attribute
*attr
;
19636 const char *str
= NULL
;
19638 attr
= dwarf2_attr (die
, name
, cu
);
19642 str
= attr
->value_as_string ();
19643 if (str
== nullptr)
19644 complaint (_("string type expected for attribute %s for "
19645 "DIE at %s in module %s"),
19646 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
19647 objfile_name (cu
->per_objfile
->objfile
));
19653 /* Return the dwo name or NULL if not present. If present, it is in either
19654 DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */
19655 static const char *
19656 dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19658 const char *dwo_name
= dwarf2_string_attr (die
, DW_AT_GNU_dwo_name
, cu
);
19659 if (dwo_name
== nullptr)
19660 dwo_name
= dwarf2_string_attr (die
, DW_AT_dwo_name
, cu
);
19664 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19665 and holds a non-zero value. This function should only be used for
19666 DW_FORM_flag or DW_FORM_flag_present attributes. */
19669 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19671 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19673 return (attr
&& DW_UNSND (attr
));
19677 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19679 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19680 which value is non-zero. However, we have to be careful with
19681 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19682 (via dwarf2_flag_true_p) follows this attribute. So we may
19683 end up accidently finding a declaration attribute that belongs
19684 to a different DIE referenced by the specification attribute,
19685 even though the given DIE does not have a declaration attribute. */
19686 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19687 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19690 /* Return the die giving the specification for DIE, if there is
19691 one. *SPEC_CU is the CU containing DIE on input, and the CU
19692 containing the return value on output. If there is no
19693 specification, but there is an abstract origin, that is
19696 static struct die_info
*
19697 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19699 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19702 if (spec_attr
== NULL
)
19703 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19705 if (spec_attr
== NULL
)
19708 return follow_die_ref (die
, spec_attr
, spec_cu
);
19711 /* Stub for free_line_header to match void * callback types. */
19714 free_line_header_voidp (void *arg
)
19716 struct line_header
*lh
= (struct line_header
*) arg
;
19721 /* A convenience function to find the proper .debug_line section for a CU. */
19723 static struct dwarf2_section_info
*
19724 get_debug_line_section (struct dwarf2_cu
*cu
)
19726 struct dwarf2_section_info
*section
;
19727 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
19729 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
19731 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19732 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
19733 else if (cu
->per_cu
->is_dwz
)
19735 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
->per_bfd
);
19737 section
= &dwz
->line
;
19740 section
= &dwarf2_per_objfile
->per_bfd
->line
;
19745 /* Read the statement program header starting at OFFSET in
19746 .debug_line, or .debug_line.dwo. Return a pointer
19747 to a struct line_header, allocated using xmalloc.
19748 Returns NULL if there is a problem reading the header, e.g., if it
19749 has a version we don't understand.
19751 NOTE: the strings in the include directory and file name tables of
19752 the returned object point into the dwarf line section buffer,
19753 and must not be freed. */
19755 static line_header_up
19756 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
19758 struct dwarf2_section_info
*section
;
19759 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
19761 section
= get_debug_line_section (cu
);
19762 section
->read (dwarf2_per_objfile
->objfile
);
19763 if (section
->buffer
== NULL
)
19765 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19766 complaint (_("missing .debug_line.dwo section"));
19768 complaint (_("missing .debug_line section"));
19772 return dwarf_decode_line_header (sect_off
, cu
->per_cu
->is_dwz
,
19773 dwarf2_per_objfile
, section
,
19777 /* Subroutine of dwarf_decode_lines to simplify it.
19778 Return the file name of the psymtab for the given file_entry.
19779 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
19780 If space for the result is malloc'd, *NAME_HOLDER will be set.
19781 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
19783 static const char *
19784 psymtab_include_file_name (const struct line_header
*lh
, const file_entry
&fe
,
19785 const dwarf2_psymtab
*pst
,
19786 const char *comp_dir
,
19787 gdb::unique_xmalloc_ptr
<char> *name_holder
)
19789 const char *include_name
= fe
.name
;
19790 const char *include_name_to_compare
= include_name
;
19791 const char *pst_filename
;
19794 const char *dir_name
= fe
.include_dir (lh
);
19796 gdb::unique_xmalloc_ptr
<char> hold_compare
;
19797 if (!IS_ABSOLUTE_PATH (include_name
)
19798 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
19800 /* Avoid creating a duplicate psymtab for PST.
19801 We do this by comparing INCLUDE_NAME and PST_FILENAME.
19802 Before we do the comparison, however, we need to account
19803 for DIR_NAME and COMP_DIR.
19804 First prepend dir_name (if non-NULL). If we still don't
19805 have an absolute path prepend comp_dir (if non-NULL).
19806 However, the directory we record in the include-file's
19807 psymtab does not contain COMP_DIR (to match the
19808 corresponding symtab(s)).
19813 bash$ gcc -g ./hello.c
19814 include_name = "hello.c"
19816 DW_AT_comp_dir = comp_dir = "/tmp"
19817 DW_AT_name = "./hello.c"
19821 if (dir_name
!= NULL
)
19823 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
19824 include_name
, (char *) NULL
));
19825 include_name
= name_holder
->get ();
19826 include_name_to_compare
= include_name
;
19828 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
19830 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
19831 include_name
, (char *) NULL
));
19832 include_name_to_compare
= hold_compare
.get ();
19836 pst_filename
= pst
->filename
;
19837 gdb::unique_xmalloc_ptr
<char> copied_name
;
19838 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
19840 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
19841 pst_filename
, (char *) NULL
));
19842 pst_filename
= copied_name
.get ();
19845 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
19849 return include_name
;
19852 /* State machine to track the state of the line number program. */
19854 class lnp_state_machine
19857 /* Initialize a machine state for the start of a line number
19859 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
19860 bool record_lines_p
);
19862 file_entry
*current_file ()
19864 /* lh->file_names is 0-based, but the file name numbers in the
19865 statement program are 1-based. */
19866 return m_line_header
->file_name_at (m_file
);
19869 /* Record the line in the state machine. END_SEQUENCE is true if
19870 we're processing the end of a sequence. */
19871 void record_line (bool end_sequence
);
19873 /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true
19874 nop-out rest of the lines in this sequence. */
19875 void check_line_address (struct dwarf2_cu
*cu
,
19876 const gdb_byte
*line_ptr
,
19877 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
19879 void handle_set_discriminator (unsigned int discriminator
)
19881 m_discriminator
= discriminator
;
19882 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
19885 /* Handle DW_LNE_set_address. */
19886 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
19889 address
+= baseaddr
;
19890 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
19893 /* Handle DW_LNS_advance_pc. */
19894 void handle_advance_pc (CORE_ADDR adjust
);
19896 /* Handle a special opcode. */
19897 void handle_special_opcode (unsigned char op_code
);
19899 /* Handle DW_LNS_advance_line. */
19900 void handle_advance_line (int line_delta
)
19902 advance_line (line_delta
);
19905 /* Handle DW_LNS_set_file. */
19906 void handle_set_file (file_name_index file
);
19908 /* Handle DW_LNS_negate_stmt. */
19909 void handle_negate_stmt ()
19911 m_is_stmt
= !m_is_stmt
;
19914 /* Handle DW_LNS_const_add_pc. */
19915 void handle_const_add_pc ();
19917 /* Handle DW_LNS_fixed_advance_pc. */
19918 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
19920 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19924 /* Handle DW_LNS_copy. */
19925 void handle_copy ()
19927 record_line (false);
19928 m_discriminator
= 0;
19931 /* Handle DW_LNE_end_sequence. */
19932 void handle_end_sequence ()
19934 m_currently_recording_lines
= true;
19938 /* Advance the line by LINE_DELTA. */
19939 void advance_line (int line_delta
)
19941 m_line
+= line_delta
;
19943 if (line_delta
!= 0)
19944 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19947 struct dwarf2_cu
*m_cu
;
19949 gdbarch
*m_gdbarch
;
19951 /* True if we're recording lines.
19952 Otherwise we're building partial symtabs and are just interested in
19953 finding include files mentioned by the line number program. */
19954 bool m_record_lines_p
;
19956 /* The line number header. */
19957 line_header
*m_line_header
;
19959 /* These are part of the standard DWARF line number state machine,
19960 and initialized according to the DWARF spec. */
19962 unsigned char m_op_index
= 0;
19963 /* The line table index of the current file. */
19964 file_name_index m_file
= 1;
19965 unsigned int m_line
= 1;
19967 /* These are initialized in the constructor. */
19969 CORE_ADDR m_address
;
19971 unsigned int m_discriminator
;
19973 /* Additional bits of state we need to track. */
19975 /* The last file that we called dwarf2_start_subfile for.
19976 This is only used for TLLs. */
19977 unsigned int m_last_file
= 0;
19978 /* The last file a line number was recorded for. */
19979 struct subfile
*m_last_subfile
= NULL
;
19981 /* When true, record the lines we decode. */
19982 bool m_currently_recording_lines
= false;
19984 /* The last line number that was recorded, used to coalesce
19985 consecutive entries for the same line. This can happen, for
19986 example, when discriminators are present. PR 17276. */
19987 unsigned int m_last_line
= 0;
19988 bool m_line_has_non_zero_discriminator
= false;
19992 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
19994 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
19995 / m_line_header
->maximum_ops_per_instruction
)
19996 * m_line_header
->minimum_instruction_length
);
19997 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19998 m_op_index
= ((m_op_index
+ adjust
)
19999 % m_line_header
->maximum_ops_per_instruction
);
20003 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
20005 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
20006 unsigned char adj_opcode_d
= adj_opcode
/ m_line_header
->line_range
;
20007 unsigned char adj_opcode_r
= adj_opcode
% m_line_header
->line_range
;
20008 CORE_ADDR addr_adj
= (((m_op_index
+ adj_opcode_d
)
20009 / m_line_header
->maximum_ops_per_instruction
)
20010 * m_line_header
->minimum_instruction_length
);
20011 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20012 m_op_index
= ((m_op_index
+ adj_opcode_d
)
20013 % m_line_header
->maximum_ops_per_instruction
);
20015 int line_delta
= m_line_header
->line_base
+ adj_opcode_r
;
20016 advance_line (line_delta
);
20017 record_line (false);
20018 m_discriminator
= 0;
20022 lnp_state_machine::handle_set_file (file_name_index file
)
20026 const file_entry
*fe
= current_file ();
20028 dwarf2_debug_line_missing_file_complaint ();
20029 else if (m_record_lines_p
)
20031 const char *dir
= fe
->include_dir (m_line_header
);
20033 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20034 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20035 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
20040 lnp_state_machine::handle_const_add_pc ()
20043 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
20046 = (((m_op_index
+ adjust
)
20047 / m_line_header
->maximum_ops_per_instruction
)
20048 * m_line_header
->minimum_instruction_length
);
20050 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20051 m_op_index
= ((m_op_index
+ adjust
)
20052 % m_line_header
->maximum_ops_per_instruction
);
20055 /* Return non-zero if we should add LINE to the line number table.
20056 LINE is the line to add, LAST_LINE is the last line that was added,
20057 LAST_SUBFILE is the subfile for LAST_LINE.
20058 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
20059 had a non-zero discriminator.
20061 We have to be careful in the presence of discriminators.
20062 E.g., for this line:
20064 for (i = 0; i < 100000; i++);
20066 clang can emit four line number entries for that one line,
20067 each with a different discriminator.
20068 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20070 However, we want gdb to coalesce all four entries into one.
20071 Otherwise the user could stepi into the middle of the line and
20072 gdb would get confused about whether the pc really was in the
20073 middle of the line.
20075 Things are further complicated by the fact that two consecutive
20076 line number entries for the same line is a heuristic used by gcc
20077 to denote the end of the prologue. So we can't just discard duplicate
20078 entries, we have to be selective about it. The heuristic we use is
20079 that we only collapse consecutive entries for the same line if at least
20080 one of those entries has a non-zero discriminator. PR 17276.
20082 Note: Addresses in the line number state machine can never go backwards
20083 within one sequence, thus this coalescing is ok. */
20086 dwarf_record_line_p (struct dwarf2_cu
*cu
,
20087 unsigned int line
, unsigned int last_line
,
20088 int line_has_non_zero_discriminator
,
20089 struct subfile
*last_subfile
)
20091 if (cu
->get_builder ()->get_current_subfile () != last_subfile
)
20093 if (line
!= last_line
)
20095 /* Same line for the same file that we've seen already.
20096 As a last check, for pr 17276, only record the line if the line
20097 has never had a non-zero discriminator. */
20098 if (!line_has_non_zero_discriminator
)
20103 /* Use the CU's builder to record line number LINE beginning at
20104 address ADDRESS in the line table of subfile SUBFILE. */
20107 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20108 unsigned int line
, CORE_ADDR address
, bool is_stmt
,
20109 struct dwarf2_cu
*cu
)
20111 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20113 if (dwarf_line_debug
)
20115 fprintf_unfiltered (gdb_stdlog
,
20116 "Recording line %u, file %s, address %s\n",
20117 line
, lbasename (subfile
->name
),
20118 paddress (gdbarch
, address
));
20122 cu
->get_builder ()->record_line (subfile
, line
, addr
, is_stmt
);
20125 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20126 Mark the end of a set of line number records.
20127 The arguments are the same as for dwarf_record_line_1.
20128 If SUBFILE is NULL the request is ignored. */
20131 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20132 CORE_ADDR address
, struct dwarf2_cu
*cu
)
20134 if (subfile
== NULL
)
20137 if (dwarf_line_debug
)
20139 fprintf_unfiltered (gdb_stdlog
,
20140 "Finishing current line, file %s, address %s\n",
20141 lbasename (subfile
->name
),
20142 paddress (gdbarch
, address
));
20145 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, true, cu
);
20149 lnp_state_machine::record_line (bool end_sequence
)
20151 if (dwarf_line_debug
)
20153 fprintf_unfiltered (gdb_stdlog
,
20154 "Processing actual line %u: file %u,"
20155 " address %s, is_stmt %u, discrim %u%s\n",
20157 paddress (m_gdbarch
, m_address
),
20158 m_is_stmt
, m_discriminator
,
20159 (end_sequence
? "\t(end sequence)" : ""));
20162 file_entry
*fe
= current_file ();
20165 dwarf2_debug_line_missing_file_complaint ();
20166 /* For now we ignore lines not starting on an instruction boundary.
20167 But not when processing end_sequence for compatibility with the
20168 previous version of the code. */
20169 else if (m_op_index
== 0 || end_sequence
)
20171 fe
->included_p
= 1;
20172 if (m_record_lines_p
)
20174 if (m_last_subfile
!= m_cu
->get_builder ()->get_current_subfile ()
20177 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
20178 m_currently_recording_lines
? m_cu
: nullptr);
20183 bool is_stmt
= producer_is_codewarrior (m_cu
) || m_is_stmt
;
20185 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
20186 m_line_has_non_zero_discriminator
,
20189 buildsym_compunit
*builder
= m_cu
->get_builder ();
20190 dwarf_record_line_1 (m_gdbarch
,
20191 builder
->get_current_subfile (),
20192 m_line
, m_address
, is_stmt
,
20193 m_currently_recording_lines
? m_cu
: nullptr);
20195 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20196 m_last_line
= m_line
;
20202 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
20203 line_header
*lh
, bool record_lines_p
)
20207 m_record_lines_p
= record_lines_p
;
20208 m_line_header
= lh
;
20210 m_currently_recording_lines
= true;
20212 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20213 was a line entry for it so that the backend has a chance to adjust it
20214 and also record it in case it needs it. This is currently used by MIPS
20215 code, cf. `mips_adjust_dwarf2_line'. */
20216 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20217 m_is_stmt
= lh
->default_is_stmt
;
20218 m_discriminator
= 0;
20222 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20223 const gdb_byte
*line_ptr
,
20224 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
20226 /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside
20227 the pc range of the CU. However, we restrict the test to only ADDRESS
20228 values of zero to preserve GDB's previous behaviour which is to handle
20229 the specific case of a function being GC'd by the linker. */
20231 if (address
== 0 && address
< unrelocated_lowpc
)
20233 /* This line table is for a function which has been
20234 GCd by the linker. Ignore it. PR gdb/12528 */
20236 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
20237 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20239 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20240 line_offset
, objfile_name (objfile
));
20241 m_currently_recording_lines
= false;
20242 /* Note: m_currently_recording_lines is left as false until we see
20243 DW_LNE_end_sequence. */
20247 /* Subroutine of dwarf_decode_lines to simplify it.
20248 Process the line number information in LH.
20249 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20250 program in order to set included_p for every referenced header. */
20253 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20254 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20256 const gdb_byte
*line_ptr
, *extended_end
;
20257 const gdb_byte
*line_end
;
20258 unsigned int bytes_read
, extended_len
;
20259 unsigned char op_code
, extended_op
;
20260 CORE_ADDR baseaddr
;
20261 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
20262 bfd
*abfd
= objfile
->obfd
;
20263 struct gdbarch
*gdbarch
= objfile
->arch ();
20264 /* True if we're recording line info (as opposed to building partial
20265 symtabs and just interested in finding include files mentioned by
20266 the line number program). */
20267 bool record_lines_p
= !decode_for_pst_p
;
20269 baseaddr
= objfile
->text_section_offset ();
20271 line_ptr
= lh
->statement_program_start
;
20272 line_end
= lh
->statement_program_end
;
20274 /* Read the statement sequences until there's nothing left. */
20275 while (line_ptr
< line_end
)
20277 /* The DWARF line number program state machine. Reset the state
20278 machine at the start of each sequence. */
20279 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
20280 bool end_sequence
= false;
20282 if (record_lines_p
)
20284 /* Start a subfile for the current file of the state
20286 const file_entry
*fe
= state_machine
.current_file ();
20289 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
20292 /* Decode the table. */
20293 while (line_ptr
< line_end
&& !end_sequence
)
20295 op_code
= read_1_byte (abfd
, line_ptr
);
20298 if (op_code
>= lh
->opcode_base
)
20300 /* Special opcode. */
20301 state_machine
.handle_special_opcode (op_code
);
20303 else switch (op_code
)
20305 case DW_LNS_extended_op
:
20306 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
20308 line_ptr
+= bytes_read
;
20309 extended_end
= line_ptr
+ extended_len
;
20310 extended_op
= read_1_byte (abfd
, line_ptr
);
20312 switch (extended_op
)
20314 case DW_LNE_end_sequence
:
20315 state_machine
.handle_end_sequence ();
20316 end_sequence
= true;
20318 case DW_LNE_set_address
:
20321 = cu
->header
.read_address (abfd
, line_ptr
, &bytes_read
);
20322 line_ptr
+= bytes_read
;
20324 state_machine
.check_line_address (cu
, line_ptr
,
20325 lowpc
- baseaddr
, address
);
20326 state_machine
.handle_set_address (baseaddr
, address
);
20329 case DW_LNE_define_file
:
20331 const char *cur_file
;
20332 unsigned int mod_time
, length
;
20335 cur_file
= read_direct_string (abfd
, line_ptr
,
20337 line_ptr
+= bytes_read
;
20338 dindex
= (dir_index
)
20339 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20340 line_ptr
+= bytes_read
;
20342 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20343 line_ptr
+= bytes_read
;
20345 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20346 line_ptr
+= bytes_read
;
20347 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
20350 case DW_LNE_set_discriminator
:
20352 /* The discriminator is not interesting to the
20353 debugger; just ignore it. We still need to
20354 check its value though:
20355 if there are consecutive entries for the same
20356 (non-prologue) line we want to coalesce them.
20359 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20360 line_ptr
+= bytes_read
;
20362 state_machine
.handle_set_discriminator (discr
);
20366 complaint (_("mangled .debug_line section"));
20369 /* Make sure that we parsed the extended op correctly. If e.g.
20370 we expected a different address size than the producer used,
20371 we may have read the wrong number of bytes. */
20372 if (line_ptr
!= extended_end
)
20374 complaint (_("mangled .debug_line section"));
20379 state_machine
.handle_copy ();
20381 case DW_LNS_advance_pc
:
20384 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20385 line_ptr
+= bytes_read
;
20387 state_machine
.handle_advance_pc (adjust
);
20390 case DW_LNS_advance_line
:
20393 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
20394 line_ptr
+= bytes_read
;
20396 state_machine
.handle_advance_line (line_delta
);
20399 case DW_LNS_set_file
:
20401 file_name_index file
20402 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
20404 line_ptr
+= bytes_read
;
20406 state_machine
.handle_set_file (file
);
20409 case DW_LNS_set_column
:
20410 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20411 line_ptr
+= bytes_read
;
20413 case DW_LNS_negate_stmt
:
20414 state_machine
.handle_negate_stmt ();
20416 case DW_LNS_set_basic_block
:
20418 /* Add to the address register of the state machine the
20419 address increment value corresponding to special opcode
20420 255. I.e., this value is scaled by the minimum
20421 instruction length since special opcode 255 would have
20422 scaled the increment. */
20423 case DW_LNS_const_add_pc
:
20424 state_machine
.handle_const_add_pc ();
20426 case DW_LNS_fixed_advance_pc
:
20428 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
20431 state_machine
.handle_fixed_advance_pc (addr_adj
);
20436 /* Unknown standard opcode, ignore it. */
20439 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
20441 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20442 line_ptr
+= bytes_read
;
20449 dwarf2_debug_line_missing_end_sequence_complaint ();
20451 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
20452 in which case we still finish recording the last line). */
20453 state_machine
.record_line (true);
20457 /* Decode the Line Number Program (LNP) for the given line_header
20458 structure and CU. The actual information extracted and the type
20459 of structures created from the LNP depends on the value of PST.
20461 1. If PST is NULL, then this procedure uses the data from the program
20462 to create all necessary symbol tables, and their linetables.
20464 2. If PST is not NULL, this procedure reads the program to determine
20465 the list of files included by the unit represented by PST, and
20466 builds all the associated partial symbol tables.
20468 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20469 It is used for relative paths in the line table.
20470 NOTE: When processing partial symtabs (pst != NULL),
20471 comp_dir == pst->dirname.
20473 NOTE: It is important that psymtabs have the same file name (via strcmp)
20474 as the corresponding symtab. Since COMP_DIR is not used in the name of the
20475 symtab we don't use it in the name of the psymtabs we create.
20476 E.g. expand_line_sal requires this when finding psymtabs to expand.
20477 A good testcase for this is mb-inline.exp.
20479 LOWPC is the lowest address in CU (or 0 if not known).
20481 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
20482 for its PC<->lines mapping information. Otherwise only the filename
20483 table is read in. */
20486 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
20487 struct dwarf2_cu
*cu
, dwarf2_psymtab
*pst
,
20488 CORE_ADDR lowpc
, int decode_mapping
)
20490 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
20491 const int decode_for_pst_p
= (pst
!= NULL
);
20493 if (decode_mapping
)
20494 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
20496 if (decode_for_pst_p
)
20498 /* Now that we're done scanning the Line Header Program, we can
20499 create the psymtab of each included file. */
20500 for (auto &file_entry
: lh
->file_names ())
20501 if (file_entry
.included_p
== 1)
20503 gdb::unique_xmalloc_ptr
<char> name_holder
;
20504 const char *include_name
=
20505 psymtab_include_file_name (lh
, file_entry
, pst
,
20506 comp_dir
, &name_holder
);
20507 if (include_name
!= NULL
)
20508 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
20513 /* Make sure a symtab is created for every file, even files
20514 which contain only variables (i.e. no code with associated
20516 buildsym_compunit
*builder
= cu
->get_builder ();
20517 struct compunit_symtab
*cust
= builder
->get_compunit_symtab ();
20519 for (auto &fe
: lh
->file_names ())
20521 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
20522 if (builder
->get_current_subfile ()->symtab
== NULL
)
20524 builder
->get_current_subfile ()->symtab
20525 = allocate_symtab (cust
,
20526 builder
->get_current_subfile ()->name
);
20528 fe
.symtab
= builder
->get_current_subfile ()->symtab
;
20533 /* Start a subfile for DWARF. FILENAME is the name of the file and
20534 DIRNAME the name of the source directory which contains FILENAME
20535 or NULL if not known.
20536 This routine tries to keep line numbers from identical absolute and
20537 relative file names in a common subfile.
20539 Using the `list' example from the GDB testsuite, which resides in
20540 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
20541 of /srcdir/list0.c yields the following debugging information for list0.c:
20543 DW_AT_name: /srcdir/list0.c
20544 DW_AT_comp_dir: /compdir
20545 files.files[0].name: list0.h
20546 files.files[0].dir: /srcdir
20547 files.files[1].name: list0.c
20548 files.files[1].dir: /srcdir
20550 The line number information for list0.c has to end up in a single
20551 subfile, so that `break /srcdir/list0.c:1' works as expected.
20552 start_subfile will ensure that this happens provided that we pass the
20553 concatenation of files.files[1].dir and files.files[1].name as the
20557 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
20558 const char *dirname
)
20560 gdb::unique_xmalloc_ptr
<char> copy
;
20562 /* In order not to lose the line information directory,
20563 we concatenate it to the filename when it makes sense.
20564 Note that the Dwarf3 standard says (speaking of filenames in line
20565 information): ``The directory index is ignored for file names
20566 that represent full path names''. Thus ignoring dirname in the
20567 `else' branch below isn't an issue. */
20569 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
20571 copy
.reset (concat (dirname
, SLASH_STRING
, filename
, (char *) NULL
));
20572 filename
= copy
.get ();
20575 cu
->get_builder ()->start_subfile (filename
);
20578 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
20579 buildsym_compunit constructor. */
20581 struct compunit_symtab
*
20582 dwarf2_cu::start_symtab (const char *name
, const char *comp_dir
,
20585 gdb_assert (m_builder
== nullptr);
20587 m_builder
.reset (new struct buildsym_compunit
20588 (this->per_objfile
->objfile
,
20589 name
, comp_dir
, language
, low_pc
));
20591 list_in_scope
= get_builder ()->get_file_symbols ();
20593 get_builder ()->record_debugformat ("DWARF 2");
20594 get_builder ()->record_producer (producer
);
20596 processing_has_namespace_info
= false;
20598 return get_builder ()->get_compunit_symtab ();
20602 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
20603 struct dwarf2_cu
*cu
)
20605 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
20606 struct comp_unit_head
*cu_header
= &cu
->header
;
20608 /* NOTE drow/2003-01-30: There used to be a comment and some special
20609 code here to turn a symbol with DW_AT_external and a
20610 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
20611 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
20612 with some versions of binutils) where shared libraries could have
20613 relocations against symbols in their debug information - the
20614 minimal symbol would have the right address, but the debug info
20615 would not. It's no longer necessary, because we will explicitly
20616 apply relocations when we read in the debug information now. */
20618 /* A DW_AT_location attribute with no contents indicates that a
20619 variable has been optimized away. */
20620 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0)
20622 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
20626 /* Handle one degenerate form of location expression specially, to
20627 preserve GDB's previous behavior when section offsets are
20628 specified. If this is just a DW_OP_addr, DW_OP_addrx, or
20629 DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */
20631 if (attr
->form_is_block ()
20632 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
20633 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
20634 || ((DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
20635 || DW_BLOCK (attr
)->data
[0] == DW_OP_addrx
)
20636 && (DW_BLOCK (attr
)->size
20637 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
20639 unsigned int dummy
;
20641 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
20642 SET_SYMBOL_VALUE_ADDRESS
20643 (sym
, cu
->header
.read_address (objfile
->obfd
,
20644 DW_BLOCK (attr
)->data
+ 1,
20647 SET_SYMBOL_VALUE_ADDRESS
20648 (sym
, read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1,
20650 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
20651 fixup_symbol_section (sym
, objfile
);
20652 SET_SYMBOL_VALUE_ADDRESS
20654 SYMBOL_VALUE_ADDRESS (sym
)
20655 + objfile
->section_offsets
[SYMBOL_SECTION (sym
)]);
20659 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
20660 expression evaluator, and use LOC_COMPUTED only when necessary
20661 (i.e. when the value of a register or memory location is
20662 referenced, or a thread-local block, etc.). Then again, it might
20663 not be worthwhile. I'm assuming that it isn't unless performance
20664 or memory numbers show me otherwise. */
20666 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
20668 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
20669 cu
->has_loclist
= true;
20672 /* Given a pointer to a DWARF information entry, figure out if we need
20673 to make a symbol table entry for it, and if so, create a new entry
20674 and return a pointer to it.
20675 If TYPE is NULL, determine symbol type from the die, otherwise
20676 used the passed type.
20677 If SPACE is not NULL, use it to hold the new symbol. If it is
20678 NULL, allocate a new symbol on the objfile's obstack. */
20680 static struct symbol
*
20681 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
20682 struct symbol
*space
)
20684 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
20685 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20686 struct gdbarch
*gdbarch
= objfile
->arch ();
20687 struct symbol
*sym
= NULL
;
20689 struct attribute
*attr
= NULL
;
20690 struct attribute
*attr2
= NULL
;
20691 CORE_ADDR baseaddr
;
20692 struct pending
**list_to_add
= NULL
;
20694 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
20696 baseaddr
= objfile
->text_section_offset ();
20698 name
= dwarf2_name (die
, cu
);
20701 int suppress_add
= 0;
20706 sym
= new (&objfile
->objfile_obstack
) symbol
;
20707 OBJSTAT (objfile
, n_syms
++);
20709 /* Cache this symbol's name and the name's demangled form (if any). */
20710 sym
->set_language (cu
->language
, &objfile
->objfile_obstack
);
20711 /* Fortran does not have mangling standard and the mangling does differ
20712 between gfortran, iFort etc. */
20713 const char *physname
20714 = (cu
->language
== language_fortran
20715 ? dwarf2_full_name (name
, die
, cu
)
20716 : dwarf2_physname (name
, die
, cu
));
20717 const char *linkagename
= dw2_linkage_name (die
, cu
);
20719 if (linkagename
== nullptr || cu
->language
== language_ada
)
20720 sym
->set_linkage_name (physname
);
20723 sym
->set_demangled_name (physname
, &objfile
->objfile_obstack
);
20724 sym
->set_linkage_name (linkagename
);
20727 /* Default assumptions.
20728 Use the passed type or decode it from the die. */
20729 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20730 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
20732 SYMBOL_TYPE (sym
) = type
;
20734 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
20735 attr
= dwarf2_attr (die
,
20736 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
20738 if (attr
!= nullptr)
20740 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
20743 attr
= dwarf2_attr (die
,
20744 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
20746 if (attr
!= nullptr)
20748 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
20749 struct file_entry
*fe
;
20751 if (cu
->line_header
!= NULL
)
20752 fe
= cu
->line_header
->file_name_at (file_index
);
20757 complaint (_("file index out of range"));
20759 symbol_set_symtab (sym
, fe
->symtab
);
20765 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
20766 if (attr
!= nullptr)
20770 addr
= attr
->value_as_address ();
20771 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
20772 SET_SYMBOL_VALUE_ADDRESS (sym
, addr
);
20774 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
20775 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
20776 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
20777 add_symbol_to_list (sym
, cu
->list_in_scope
);
20779 case DW_TAG_subprogram
:
20780 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20782 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20783 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20784 if ((attr2
&& (DW_UNSND (attr2
) != 0))
20785 || cu
->language
== language_ada
20786 || cu
->language
== language_fortran
)
20788 /* Subprograms marked external are stored as a global symbol.
20789 Ada and Fortran subprograms, whether marked external or
20790 not, are always stored as a global symbol, because we want
20791 to be able to access them globally. For instance, we want
20792 to be able to break on a nested subprogram without having
20793 to specify the context. */
20794 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20798 list_to_add
= cu
->list_in_scope
;
20801 case DW_TAG_inlined_subroutine
:
20802 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20804 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20805 SYMBOL_INLINED (sym
) = 1;
20806 list_to_add
= cu
->list_in_scope
;
20808 case DW_TAG_template_value_param
:
20810 /* Fall through. */
20811 case DW_TAG_constant
:
20812 case DW_TAG_variable
:
20813 case DW_TAG_member
:
20814 /* Compilation with minimal debug info may result in
20815 variables with missing type entries. Change the
20816 misleading `void' type to something sensible. */
20817 if (SYMBOL_TYPE (sym
)->code () == TYPE_CODE_VOID
)
20818 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
20820 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20821 /* In the case of DW_TAG_member, we should only be called for
20822 static const members. */
20823 if (die
->tag
== DW_TAG_member
)
20825 /* dwarf2_add_field uses die_is_declaration,
20826 so we do the same. */
20827 gdb_assert (die_is_declaration (die
, cu
));
20830 if (attr
!= nullptr)
20832 dwarf2_const_value (attr
, sym
, cu
);
20833 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20836 if (attr2
&& (DW_UNSND (attr2
) != 0))
20837 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20839 list_to_add
= cu
->list_in_scope
;
20843 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20844 if (attr
!= nullptr)
20846 var_decode_location (attr
, sym
, cu
);
20847 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20849 /* Fortran explicitly imports any global symbols to the local
20850 scope by DW_TAG_common_block. */
20851 if (cu
->language
== language_fortran
&& die
->parent
20852 && die
->parent
->tag
== DW_TAG_common_block
)
20855 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20856 && SYMBOL_VALUE_ADDRESS (sym
) == 0
20857 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
20859 /* When a static variable is eliminated by the linker,
20860 the corresponding debug information is not stripped
20861 out, but the variable address is set to null;
20862 do not add such variables into symbol table. */
20864 else if (attr2
&& (DW_UNSND (attr2
) != 0))
20866 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20867 && (objfile
->flags
& OBJF_MAINLINE
) == 0
20868 && dwarf2_per_objfile
->per_bfd
->can_copy
)
20870 /* A global static variable might be subject to
20871 copy relocation. We first check for a local
20872 minsym, though, because maybe the symbol was
20873 marked hidden, in which case this would not
20875 bound_minimal_symbol found
20876 = (lookup_minimal_symbol_linkage
20877 (sym
->linkage_name (), objfile
));
20878 if (found
.minsym
!= nullptr)
20879 sym
->maybe_copied
= 1;
20882 /* A variable with DW_AT_external is never static,
20883 but it may be block-scoped. */
20885 = ((cu
->list_in_scope
20886 == cu
->get_builder ()->get_file_symbols ())
20887 ? cu
->get_builder ()->get_global_symbols ()
20888 : cu
->list_in_scope
);
20891 list_to_add
= cu
->list_in_scope
;
20895 /* We do not know the address of this symbol.
20896 If it is an external symbol and we have type information
20897 for it, enter the symbol as a LOC_UNRESOLVED symbol.
20898 The address of the variable will then be determined from
20899 the minimal symbol table whenever the variable is
20901 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20903 /* Fortran explicitly imports any global symbols to the local
20904 scope by DW_TAG_common_block. */
20905 if (cu
->language
== language_fortran
&& die
->parent
20906 && die
->parent
->tag
== DW_TAG_common_block
)
20908 /* SYMBOL_CLASS doesn't matter here because
20909 read_common_block is going to reset it. */
20911 list_to_add
= cu
->list_in_scope
;
20913 else if (attr2
&& (DW_UNSND (attr2
) != 0)
20914 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
20916 /* A variable with DW_AT_external is never static, but it
20917 may be block-scoped. */
20919 = ((cu
->list_in_scope
20920 == cu
->get_builder ()->get_file_symbols ())
20921 ? cu
->get_builder ()->get_global_symbols ()
20922 : cu
->list_in_scope
);
20924 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
20926 else if (!die_is_declaration (die
, cu
))
20928 /* Use the default LOC_OPTIMIZED_OUT class. */
20929 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
20931 list_to_add
= cu
->list_in_scope
;
20935 case DW_TAG_formal_parameter
:
20937 /* If we are inside a function, mark this as an argument. If
20938 not, we might be looking at an argument to an inlined function
20939 when we do not have enough information to show inlined frames;
20940 pretend it's a local variable in that case so that the user can
20942 struct context_stack
*curr
20943 = cu
->get_builder ()->get_current_context_stack ();
20944 if (curr
!= nullptr && curr
->name
!= nullptr)
20945 SYMBOL_IS_ARGUMENT (sym
) = 1;
20946 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20947 if (attr
!= nullptr)
20949 var_decode_location (attr
, sym
, cu
);
20951 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20952 if (attr
!= nullptr)
20954 dwarf2_const_value (attr
, sym
, cu
);
20957 list_to_add
= cu
->list_in_scope
;
20960 case DW_TAG_unspecified_parameters
:
20961 /* From varargs functions; gdb doesn't seem to have any
20962 interest in this information, so just ignore it for now.
20965 case DW_TAG_template_type_param
:
20967 /* Fall through. */
20968 case DW_TAG_class_type
:
20969 case DW_TAG_interface_type
:
20970 case DW_TAG_structure_type
:
20971 case DW_TAG_union_type
:
20972 case DW_TAG_set_type
:
20973 case DW_TAG_enumeration_type
:
20974 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20975 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
20978 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
20979 really ever be static objects: otherwise, if you try
20980 to, say, break of a class's method and you're in a file
20981 which doesn't mention that class, it won't work unless
20982 the check for all static symbols in lookup_symbol_aux
20983 saves you. See the OtherFileClass tests in
20984 gdb.c++/namespace.exp. */
20988 buildsym_compunit
*builder
= cu
->get_builder ();
20990 = (cu
->list_in_scope
== builder
->get_file_symbols ()
20991 && cu
->language
== language_cplus
20992 ? builder
->get_global_symbols ()
20993 : cu
->list_in_scope
);
20995 /* The semantics of C++ state that "struct foo {
20996 ... }" also defines a typedef for "foo". */
20997 if (cu
->language
== language_cplus
20998 || cu
->language
== language_ada
20999 || cu
->language
== language_d
21000 || cu
->language
== language_rust
)
21002 /* The symbol's name is already allocated along
21003 with this objfile, so we don't need to
21004 duplicate it for the type. */
21005 if (SYMBOL_TYPE (sym
)->name () == 0)
21006 SYMBOL_TYPE (sym
)->set_name (sym
->search_name ());
21011 case DW_TAG_typedef
:
21012 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21013 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21014 list_to_add
= cu
->list_in_scope
;
21016 case DW_TAG_base_type
:
21017 case DW_TAG_subrange_type
:
21018 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21019 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21020 list_to_add
= cu
->list_in_scope
;
21022 case DW_TAG_enumerator
:
21023 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21024 if (attr
!= nullptr)
21026 dwarf2_const_value (attr
, sym
, cu
);
21029 /* NOTE: carlton/2003-11-10: See comment above in the
21030 DW_TAG_class_type, etc. block. */
21033 = (cu
->list_in_scope
== cu
->get_builder ()->get_file_symbols ()
21034 && cu
->language
== language_cplus
21035 ? cu
->get_builder ()->get_global_symbols ()
21036 : cu
->list_in_scope
);
21039 case DW_TAG_imported_declaration
:
21040 case DW_TAG_namespace
:
21041 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21042 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21044 case DW_TAG_module
:
21045 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21046 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
21047 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21049 case DW_TAG_common_block
:
21050 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
21051 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
21052 add_symbol_to_list (sym
, cu
->list_in_scope
);
21055 /* Not a tag we recognize. Hopefully we aren't processing
21056 trash data, but since we must specifically ignore things
21057 we don't recognize, there is nothing else we should do at
21059 complaint (_("unsupported tag: '%s'"),
21060 dwarf_tag_name (die
->tag
));
21066 sym
->hash_next
= objfile
->template_symbols
;
21067 objfile
->template_symbols
= sym
;
21068 list_to_add
= NULL
;
21071 if (list_to_add
!= NULL
)
21072 add_symbol_to_list (sym
, list_to_add
);
21074 /* For the benefit of old versions of GCC, check for anonymous
21075 namespaces based on the demangled name. */
21076 if (!cu
->processing_has_namespace_info
21077 && cu
->language
== language_cplus
)
21078 cp_scan_for_anonymous_namespaces (cu
->get_builder (), sym
, objfile
);
21083 /* Given an attr with a DW_FORM_dataN value in host byte order,
21084 zero-extend it as appropriate for the symbol's type. The DWARF
21085 standard (v4) is not entirely clear about the meaning of using
21086 DW_FORM_dataN for a constant with a signed type, where the type is
21087 wider than the data. The conclusion of a discussion on the DWARF
21088 list was that this is unspecified. We choose to always zero-extend
21089 because that is the interpretation long in use by GCC. */
21092 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21093 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21095 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21096 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21097 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21098 LONGEST l
= DW_UNSND (attr
);
21100 if (bits
< sizeof (*value
) * 8)
21102 l
&= ((LONGEST
) 1 << bits
) - 1;
21105 else if (bits
== sizeof (*value
) * 8)
21109 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21110 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21117 /* Read a constant value from an attribute. Either set *VALUE, or if
21118 the value does not fit in *VALUE, set *BYTES - either already
21119 allocated on the objfile obstack, or newly allocated on OBSTACK,
21120 or, set *BATON, if we translated the constant to a location
21124 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21125 const char *name
, struct obstack
*obstack
,
21126 struct dwarf2_cu
*cu
,
21127 LONGEST
*value
, const gdb_byte
**bytes
,
21128 struct dwarf2_locexpr_baton
**baton
)
21130 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
21131 struct objfile
*objfile
= per_objfile
->objfile
;
21132 struct comp_unit_head
*cu_header
= &cu
->header
;
21133 struct dwarf_block
*blk
;
21134 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21135 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21141 switch (attr
->form
)
21144 case DW_FORM_addrx
:
21145 case DW_FORM_GNU_addr_index
:
21149 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21150 dwarf2_const_value_length_mismatch_complaint (name
,
21151 cu_header
->addr_size
,
21152 TYPE_LENGTH (type
));
21153 /* Symbols of this form are reasonably rare, so we just
21154 piggyback on the existing location code rather than writing
21155 a new implementation of symbol_computed_ops. */
21156 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21157 (*baton
)->per_objfile
= per_objfile
;
21158 (*baton
)->per_cu
= cu
->per_cu
;
21159 gdb_assert ((*baton
)->per_cu
);
21161 (*baton
)->size
= 2 + cu_header
->addr_size
;
21162 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21163 (*baton
)->data
= data
;
21165 data
[0] = DW_OP_addr
;
21166 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21167 byte_order
, DW_ADDR (attr
));
21168 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21171 case DW_FORM_string
:
21174 case DW_FORM_GNU_str_index
:
21175 case DW_FORM_GNU_strp_alt
:
21176 /* DW_STRING is already allocated on the objfile obstack, point
21178 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21180 case DW_FORM_block1
:
21181 case DW_FORM_block2
:
21182 case DW_FORM_block4
:
21183 case DW_FORM_block
:
21184 case DW_FORM_exprloc
:
21185 case DW_FORM_data16
:
21186 blk
= DW_BLOCK (attr
);
21187 if (TYPE_LENGTH (type
) != blk
->size
)
21188 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21189 TYPE_LENGTH (type
));
21190 *bytes
= blk
->data
;
21193 /* The DW_AT_const_value attributes are supposed to carry the
21194 symbol's value "represented as it would be on the target
21195 architecture." By the time we get here, it's already been
21196 converted to host endianness, so we just need to sign- or
21197 zero-extend it as appropriate. */
21198 case DW_FORM_data1
:
21199 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21201 case DW_FORM_data2
:
21202 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21204 case DW_FORM_data4
:
21205 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21207 case DW_FORM_data8
:
21208 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21211 case DW_FORM_sdata
:
21212 case DW_FORM_implicit_const
:
21213 *value
= DW_SND (attr
);
21216 case DW_FORM_udata
:
21217 *value
= DW_UNSND (attr
);
21221 complaint (_("unsupported const value attribute form: '%s'"),
21222 dwarf_form_name (attr
->form
));
21229 /* Copy constant value from an attribute to a symbol. */
21232 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21233 struct dwarf2_cu
*cu
)
21235 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21237 const gdb_byte
*bytes
;
21238 struct dwarf2_locexpr_baton
*baton
;
21240 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21241 sym
->print_name (),
21242 &objfile
->objfile_obstack
, cu
,
21243 &value
, &bytes
, &baton
);
21247 SYMBOL_LOCATION_BATON (sym
) = baton
;
21248 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21250 else if (bytes
!= NULL
)
21252 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21253 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21257 SYMBOL_VALUE (sym
) = value
;
21258 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21262 /* Return the type of the die in question using its DW_AT_type attribute. */
21264 static struct type
*
21265 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21267 struct attribute
*type_attr
;
21269 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21272 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21273 /* A missing DW_AT_type represents a void type. */
21274 return objfile_type (objfile
)->builtin_void
;
21277 return lookup_die_type (die
, type_attr
, cu
);
21280 /* True iff CU's producer generates GNAT Ada auxiliary information
21281 that allows to find parallel types through that information instead
21282 of having to do expensive parallel lookups by type name. */
21285 need_gnat_info (struct dwarf2_cu
*cu
)
21287 /* Assume that the Ada compiler was GNAT, which always produces
21288 the auxiliary information. */
21289 return (cu
->language
== language_ada
);
21292 /* Return the auxiliary type of the die in question using its
21293 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
21294 attribute is not present. */
21296 static struct type
*
21297 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21299 struct attribute
*type_attr
;
21301 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
21305 return lookup_die_type (die
, type_attr
, cu
);
21308 /* If DIE has a descriptive_type attribute, then set the TYPE's
21309 descriptive type accordingly. */
21312 set_descriptive_type (struct type
*type
, struct die_info
*die
,
21313 struct dwarf2_cu
*cu
)
21315 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
21317 if (descriptive_type
)
21319 ALLOCATE_GNAT_AUX_TYPE (type
);
21320 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
21324 /* Return the containing type of the die in question using its
21325 DW_AT_containing_type attribute. */
21327 static struct type
*
21328 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21330 struct attribute
*type_attr
;
21331 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21333 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
21335 error (_("Dwarf Error: Problem turning containing type into gdb type "
21336 "[in module %s]"), objfile_name (objfile
));
21338 return lookup_die_type (die
, type_attr
, cu
);
21341 /* Return an error marker type to use for the ill formed type in DIE/CU. */
21343 static struct type
*
21344 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
21346 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
21347 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21350 std::string message
21351 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
21352 objfile_name (objfile
),
21353 sect_offset_str (cu
->header
.sect_off
),
21354 sect_offset_str (die
->sect_off
));
21355 saved
= obstack_strdup (&objfile
->objfile_obstack
, message
);
21357 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
21360 /* Look up the type of DIE in CU using its type attribute ATTR.
21361 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
21362 DW_AT_containing_type.
21363 If there is no type substitute an error marker. */
21365 static struct type
*
21366 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
21367 struct dwarf2_cu
*cu
)
21369 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
21370 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21371 struct type
*this_type
;
21373 gdb_assert (attr
->name
== DW_AT_type
21374 || attr
->name
== DW_AT_GNAT_descriptive_type
21375 || attr
->name
== DW_AT_containing_type
);
21377 /* First see if we have it cached. */
21379 if (attr
->form
== DW_FORM_GNU_ref_alt
)
21381 struct dwarf2_per_cu_data
*per_cu
;
21382 sect_offset sect_off
= attr
->get_ref_die_offset ();
21384 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
21385 dwarf2_per_objfile
);
21386 this_type
= get_die_type_at_offset (sect_off
, per_cu
, dwarf2_per_objfile
);
21388 else if (attr
->form_is_ref ())
21390 sect_offset sect_off
= attr
->get_ref_die_offset ();
21392 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
,
21393 dwarf2_per_objfile
);
21395 else if (attr
->form
== DW_FORM_ref_sig8
)
21397 ULONGEST signature
= DW_SIGNATURE (attr
);
21399 return get_signatured_type (die
, signature
, cu
);
21403 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
21404 " at %s [in module %s]"),
21405 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
21406 objfile_name (objfile
));
21407 return build_error_marker_type (cu
, die
);
21410 /* If not cached we need to read it in. */
21412 if (this_type
== NULL
)
21414 struct die_info
*type_die
= NULL
;
21415 struct dwarf2_cu
*type_cu
= cu
;
21417 if (attr
->form_is_ref ())
21418 type_die
= follow_die_ref (die
, attr
, &type_cu
);
21419 if (type_die
== NULL
)
21420 return build_error_marker_type (cu
, die
);
21421 /* If we find the type now, it's probably because the type came
21422 from an inter-CU reference and the type's CU got expanded before
21424 this_type
= read_type_die (type_die
, type_cu
);
21427 /* If we still don't have a type use an error marker. */
21429 if (this_type
== NULL
)
21430 return build_error_marker_type (cu
, die
);
21435 /* Return the type in DIE, CU.
21436 Returns NULL for invalid types.
21438 This first does a lookup in die_type_hash,
21439 and only reads the die in if necessary.
21441 NOTE: This can be called when reading in partial or full symbols. */
21443 static struct type
*
21444 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
21446 struct type
*this_type
;
21448 this_type
= get_die_type (die
, cu
);
21452 return read_type_die_1 (die
, cu
);
21455 /* Read the type in DIE, CU.
21456 Returns NULL for invalid types. */
21458 static struct type
*
21459 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
21461 struct type
*this_type
= NULL
;
21465 case DW_TAG_class_type
:
21466 case DW_TAG_interface_type
:
21467 case DW_TAG_structure_type
:
21468 case DW_TAG_union_type
:
21469 this_type
= read_structure_type (die
, cu
);
21471 case DW_TAG_enumeration_type
:
21472 this_type
= read_enumeration_type (die
, cu
);
21474 case DW_TAG_subprogram
:
21475 case DW_TAG_subroutine_type
:
21476 case DW_TAG_inlined_subroutine
:
21477 this_type
= read_subroutine_type (die
, cu
);
21479 case DW_TAG_array_type
:
21480 this_type
= read_array_type (die
, cu
);
21482 case DW_TAG_set_type
:
21483 this_type
= read_set_type (die
, cu
);
21485 case DW_TAG_pointer_type
:
21486 this_type
= read_tag_pointer_type (die
, cu
);
21488 case DW_TAG_ptr_to_member_type
:
21489 this_type
= read_tag_ptr_to_member_type (die
, cu
);
21491 case DW_TAG_reference_type
:
21492 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
21494 case DW_TAG_rvalue_reference_type
:
21495 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
21497 case DW_TAG_const_type
:
21498 this_type
= read_tag_const_type (die
, cu
);
21500 case DW_TAG_volatile_type
:
21501 this_type
= read_tag_volatile_type (die
, cu
);
21503 case DW_TAG_restrict_type
:
21504 this_type
= read_tag_restrict_type (die
, cu
);
21506 case DW_TAG_string_type
:
21507 this_type
= read_tag_string_type (die
, cu
);
21509 case DW_TAG_typedef
:
21510 this_type
= read_typedef (die
, cu
);
21512 case DW_TAG_subrange_type
:
21513 this_type
= read_subrange_type (die
, cu
);
21515 case DW_TAG_base_type
:
21516 this_type
= read_base_type (die
, cu
);
21518 case DW_TAG_unspecified_type
:
21519 this_type
= read_unspecified_type (die
, cu
);
21521 case DW_TAG_namespace
:
21522 this_type
= read_namespace_type (die
, cu
);
21524 case DW_TAG_module
:
21525 this_type
= read_module_type (die
, cu
);
21527 case DW_TAG_atomic_type
:
21528 this_type
= read_tag_atomic_type (die
, cu
);
21531 complaint (_("unexpected tag in read_type_die: '%s'"),
21532 dwarf_tag_name (die
->tag
));
21539 /* See if we can figure out if the class lives in a namespace. We do
21540 this by looking for a member function; its demangled name will
21541 contain namespace info, if there is any.
21542 Return the computed name or NULL.
21543 Space for the result is allocated on the objfile's obstack.
21544 This is the full-die version of guess_partial_die_structure_name.
21545 In this case we know DIE has no useful parent. */
21547 static const char *
21548 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21550 struct die_info
*spec_die
;
21551 struct dwarf2_cu
*spec_cu
;
21552 struct die_info
*child
;
21553 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21556 spec_die
= die_specification (die
, &spec_cu
);
21557 if (spec_die
!= NULL
)
21563 for (child
= die
->child
;
21565 child
= child
->sibling
)
21567 if (child
->tag
== DW_TAG_subprogram
)
21569 const char *linkage_name
= dw2_linkage_name (child
, cu
);
21571 if (linkage_name
!= NULL
)
21573 gdb::unique_xmalloc_ptr
<char> actual_name
21574 (language_class_name_from_physname (cu
->language_defn
,
21576 const char *name
= NULL
;
21578 if (actual_name
!= NULL
)
21580 const char *die_name
= dwarf2_name (die
, cu
);
21582 if (die_name
!= NULL
21583 && strcmp (die_name
, actual_name
.get ()) != 0)
21585 /* Strip off the class name from the full name.
21586 We want the prefix. */
21587 int die_name_len
= strlen (die_name
);
21588 int actual_name_len
= strlen (actual_name
.get ());
21589 const char *ptr
= actual_name
.get ();
21591 /* Test for '::' as a sanity check. */
21592 if (actual_name_len
> die_name_len
+ 2
21593 && ptr
[actual_name_len
- die_name_len
- 1] == ':')
21594 name
= obstack_strndup (
21595 &objfile
->per_bfd
->storage_obstack
,
21596 ptr
, actual_name_len
- die_name_len
- 2);
21607 /* GCC might emit a nameless typedef that has a linkage name. Determine the
21608 prefix part in such case. See
21609 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21611 static const char *
21612 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
21614 struct attribute
*attr
;
21617 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
21618 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
21621 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
21624 attr
= dw2_linkage_name_attr (die
, cu
);
21625 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21628 /* dwarf2_name had to be already called. */
21629 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
21631 /* Strip the base name, keep any leading namespaces/classes. */
21632 base
= strrchr (DW_STRING (attr
), ':');
21633 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
21636 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21637 return obstack_strndup (&objfile
->per_bfd
->storage_obstack
,
21639 &base
[-1] - DW_STRING (attr
));
21642 /* Return the name of the namespace/class that DIE is defined within,
21643 or "" if we can't tell. The caller should not xfree the result.
21645 For example, if we're within the method foo() in the following
21655 then determine_prefix on foo's die will return "N::C". */
21657 static const char *
21658 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
21660 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
21661 struct die_info
*parent
, *spec_die
;
21662 struct dwarf2_cu
*spec_cu
;
21663 struct type
*parent_type
;
21664 const char *retval
;
21666 if (cu
->language
!= language_cplus
21667 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
21668 && cu
->language
!= language_rust
)
21671 retval
= anonymous_struct_prefix (die
, cu
);
21675 /* We have to be careful in the presence of DW_AT_specification.
21676 For example, with GCC 3.4, given the code
21680 // Definition of N::foo.
21684 then we'll have a tree of DIEs like this:
21686 1: DW_TAG_compile_unit
21687 2: DW_TAG_namespace // N
21688 3: DW_TAG_subprogram // declaration of N::foo
21689 4: DW_TAG_subprogram // definition of N::foo
21690 DW_AT_specification // refers to die #3
21692 Thus, when processing die #4, we have to pretend that we're in
21693 the context of its DW_AT_specification, namely the contex of die
21696 spec_die
= die_specification (die
, &spec_cu
);
21697 if (spec_die
== NULL
)
21698 parent
= die
->parent
;
21701 parent
= spec_die
->parent
;
21705 if (parent
== NULL
)
21707 else if (parent
->building_fullname
)
21710 const char *parent_name
;
21712 /* It has been seen on RealView 2.2 built binaries,
21713 DW_TAG_template_type_param types actually _defined_ as
21714 children of the parent class:
21717 template class <class Enum> Class{};
21718 Class<enum E> class_e;
21720 1: DW_TAG_class_type (Class)
21721 2: DW_TAG_enumeration_type (E)
21722 3: DW_TAG_enumerator (enum1:0)
21723 3: DW_TAG_enumerator (enum2:1)
21725 2: DW_TAG_template_type_param
21726 DW_AT_type DW_FORM_ref_udata (E)
21728 Besides being broken debug info, it can put GDB into an
21729 infinite loop. Consider:
21731 When we're building the full name for Class<E>, we'll start
21732 at Class, and go look over its template type parameters,
21733 finding E. We'll then try to build the full name of E, and
21734 reach here. We're now trying to build the full name of E,
21735 and look over the parent DIE for containing scope. In the
21736 broken case, if we followed the parent DIE of E, we'd again
21737 find Class, and once again go look at its template type
21738 arguments, etc., etc. Simply don't consider such parent die
21739 as source-level parent of this die (it can't be, the language
21740 doesn't allow it), and break the loop here. */
21741 name
= dwarf2_name (die
, cu
);
21742 parent_name
= dwarf2_name (parent
, cu
);
21743 complaint (_("template param type '%s' defined within parent '%s'"),
21744 name
? name
: "<unknown>",
21745 parent_name
? parent_name
: "<unknown>");
21749 switch (parent
->tag
)
21751 case DW_TAG_namespace
:
21752 parent_type
= read_type_die (parent
, cu
);
21753 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
21754 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
21755 Work around this problem here. */
21756 if (cu
->language
== language_cplus
21757 && strcmp (parent_type
->name (), "::") == 0)
21759 /* We give a name to even anonymous namespaces. */
21760 return parent_type
->name ();
21761 case DW_TAG_class_type
:
21762 case DW_TAG_interface_type
:
21763 case DW_TAG_structure_type
:
21764 case DW_TAG_union_type
:
21765 case DW_TAG_module
:
21766 parent_type
= read_type_die (parent
, cu
);
21767 if (parent_type
->name () != NULL
)
21768 return parent_type
->name ();
21770 /* An anonymous structure is only allowed non-static data
21771 members; no typedefs, no member functions, et cetera.
21772 So it does not need a prefix. */
21774 case DW_TAG_compile_unit
:
21775 case DW_TAG_partial_unit
:
21776 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
21777 if (cu
->language
== language_cplus
21778 && !dwarf2_per_objfile
->per_bfd
->types
.empty ()
21779 && die
->child
!= NULL
21780 && (die
->tag
== DW_TAG_class_type
21781 || die
->tag
== DW_TAG_structure_type
21782 || die
->tag
== DW_TAG_union_type
))
21784 const char *name
= guess_full_die_structure_name (die
, cu
);
21789 case DW_TAG_subprogram
:
21790 /* Nested subroutines in Fortran get a prefix with the name
21791 of the parent's subroutine. */
21792 if (cu
->language
== language_fortran
)
21794 if ((die
->tag
== DW_TAG_subprogram
)
21795 && (dwarf2_name (parent
, cu
) != NULL
))
21796 return dwarf2_name (parent
, cu
);
21798 return determine_prefix (parent
, cu
);
21799 case DW_TAG_enumeration_type
:
21800 parent_type
= read_type_die (parent
, cu
);
21801 if (TYPE_DECLARED_CLASS (parent_type
))
21803 if (parent_type
->name () != NULL
)
21804 return parent_type
->name ();
21807 /* Fall through. */
21809 return determine_prefix (parent
, cu
);
21813 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
21814 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
21815 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
21816 an obconcat, otherwise allocate storage for the result. The CU argument is
21817 used to determine the language and hence, the appropriate separator. */
21819 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
21822 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
21823 int physname
, struct dwarf2_cu
*cu
)
21825 const char *lead
= "";
21828 if (suffix
== NULL
|| suffix
[0] == '\0'
21829 || prefix
== NULL
|| prefix
[0] == '\0')
21831 else if (cu
->language
== language_d
)
21833 /* For D, the 'main' function could be defined in any module, but it
21834 should never be prefixed. */
21835 if (strcmp (suffix
, "D main") == 0)
21843 else if (cu
->language
== language_fortran
&& physname
)
21845 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
21846 DW_AT_MIPS_linkage_name is preferred and used instead. */
21854 if (prefix
== NULL
)
21856 if (suffix
== NULL
)
21863 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
21865 strcpy (retval
, lead
);
21866 strcat (retval
, prefix
);
21867 strcat (retval
, sep
);
21868 strcat (retval
, suffix
);
21873 /* We have an obstack. */
21874 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
21878 /* Get name of a die, return NULL if not found. */
21880 static const char *
21881 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
21882 struct objfile
*objfile
)
21884 if (name
&& cu
->language
== language_cplus
)
21886 gdb::unique_xmalloc_ptr
<char> canon_name
21887 = cp_canonicalize_string (name
);
21889 if (canon_name
!= nullptr)
21890 name
= objfile
->intern (canon_name
.get ());
21896 /* Get name of a die, return NULL if not found.
21897 Anonymous namespaces are converted to their magic string. */
21899 static const char *
21900 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21902 struct attribute
*attr
;
21903 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21905 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
21906 if ((!attr
|| !DW_STRING (attr
))
21907 && die
->tag
!= DW_TAG_namespace
21908 && die
->tag
!= DW_TAG_class_type
21909 && die
->tag
!= DW_TAG_interface_type
21910 && die
->tag
!= DW_TAG_structure_type
21911 && die
->tag
!= DW_TAG_union_type
)
21916 case DW_TAG_compile_unit
:
21917 case DW_TAG_partial_unit
:
21918 /* Compilation units have a DW_AT_name that is a filename, not
21919 a source language identifier. */
21920 case DW_TAG_enumeration_type
:
21921 case DW_TAG_enumerator
:
21922 /* These tags always have simple identifiers already; no need
21923 to canonicalize them. */
21924 return DW_STRING (attr
);
21926 case DW_TAG_namespace
:
21927 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
21928 return DW_STRING (attr
);
21929 return CP_ANONYMOUS_NAMESPACE_STR
;
21931 case DW_TAG_class_type
:
21932 case DW_TAG_interface_type
:
21933 case DW_TAG_structure_type
:
21934 case DW_TAG_union_type
:
21935 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
21936 structures or unions. These were of the form "._%d" in GCC 4.1,
21937 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
21938 and GCC 4.4. We work around this problem by ignoring these. */
21939 if (attr
&& DW_STRING (attr
)
21940 && (startswith (DW_STRING (attr
), "._")
21941 || startswith (DW_STRING (attr
), "<anonymous")))
21944 /* GCC might emit a nameless typedef that has a linkage name. See
21945 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21946 if (!attr
|| DW_STRING (attr
) == NULL
)
21948 attr
= dw2_linkage_name_attr (die
, cu
);
21949 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21952 /* Avoid demangling DW_STRING (attr) the second time on a second
21953 call for the same DIE. */
21954 if (!DW_STRING_IS_CANONICAL (attr
))
21956 gdb::unique_xmalloc_ptr
<char> demangled
21957 (gdb_demangle (DW_STRING (attr
), DMGL_TYPES
));
21958 if (demangled
== nullptr)
21961 DW_STRING (attr
) = objfile
->intern (demangled
.get ());
21962 DW_STRING_IS_CANONICAL (attr
) = 1;
21965 /* Strip any leading namespaces/classes, keep only the base name.
21966 DW_AT_name for named DIEs does not contain the prefixes. */
21967 const char *base
= strrchr (DW_STRING (attr
), ':');
21968 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
21971 return DW_STRING (attr
);
21979 if (!DW_STRING_IS_CANONICAL (attr
))
21981 DW_STRING (attr
) = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
21983 DW_STRING_IS_CANONICAL (attr
) = 1;
21985 return DW_STRING (attr
);
21988 /* Return the die that this die in an extension of, or NULL if there
21989 is none. *EXT_CU is the CU containing DIE on input, and the CU
21990 containing the return value on output. */
21992 static struct die_info
*
21993 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
21995 struct attribute
*attr
;
21997 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
22001 return follow_die_ref (die
, attr
, ext_cu
);
22005 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
22009 print_spaces (indent
, f
);
22010 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
22011 dwarf_tag_name (die
->tag
), die
->abbrev
,
22012 sect_offset_str (die
->sect_off
));
22014 if (die
->parent
!= NULL
)
22016 print_spaces (indent
, f
);
22017 fprintf_unfiltered (f
, " parent at offset: %s\n",
22018 sect_offset_str (die
->parent
->sect_off
));
22021 print_spaces (indent
, f
);
22022 fprintf_unfiltered (f
, " has children: %s\n",
22023 dwarf_bool_name (die
->child
!= NULL
));
22025 print_spaces (indent
, f
);
22026 fprintf_unfiltered (f
, " attributes:\n");
22028 for (i
= 0; i
< die
->num_attrs
; ++i
)
22030 print_spaces (indent
, f
);
22031 fprintf_unfiltered (f
, " %s (%s) ",
22032 dwarf_attr_name (die
->attrs
[i
].name
),
22033 dwarf_form_name (die
->attrs
[i
].form
));
22035 switch (die
->attrs
[i
].form
)
22038 case DW_FORM_addrx
:
22039 case DW_FORM_GNU_addr_index
:
22040 fprintf_unfiltered (f
, "address: ");
22041 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
22043 case DW_FORM_block2
:
22044 case DW_FORM_block4
:
22045 case DW_FORM_block
:
22046 case DW_FORM_block1
:
22047 fprintf_unfiltered (f
, "block: size %s",
22048 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22050 case DW_FORM_exprloc
:
22051 fprintf_unfiltered (f
, "expression: size %s",
22052 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22054 case DW_FORM_data16
:
22055 fprintf_unfiltered (f
, "constant of 16 bytes");
22057 case DW_FORM_ref_addr
:
22058 fprintf_unfiltered (f
, "ref address: ");
22059 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22061 case DW_FORM_GNU_ref_alt
:
22062 fprintf_unfiltered (f
, "alt ref address: ");
22063 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22069 case DW_FORM_ref_udata
:
22070 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
22071 (long) (DW_UNSND (&die
->attrs
[i
])));
22073 case DW_FORM_data1
:
22074 case DW_FORM_data2
:
22075 case DW_FORM_data4
:
22076 case DW_FORM_data8
:
22077 case DW_FORM_udata
:
22078 case DW_FORM_sdata
:
22079 fprintf_unfiltered (f
, "constant: %s",
22080 pulongest (DW_UNSND (&die
->attrs
[i
])));
22082 case DW_FORM_sec_offset
:
22083 fprintf_unfiltered (f
, "section offset: %s",
22084 pulongest (DW_UNSND (&die
->attrs
[i
])));
22086 case DW_FORM_ref_sig8
:
22087 fprintf_unfiltered (f
, "signature: %s",
22088 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
22090 case DW_FORM_string
:
22092 case DW_FORM_line_strp
:
22094 case DW_FORM_GNU_str_index
:
22095 case DW_FORM_GNU_strp_alt
:
22096 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22097 DW_STRING (&die
->attrs
[i
])
22098 ? DW_STRING (&die
->attrs
[i
]) : "",
22099 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
22102 if (DW_UNSND (&die
->attrs
[i
]))
22103 fprintf_unfiltered (f
, "flag: TRUE");
22105 fprintf_unfiltered (f
, "flag: FALSE");
22107 case DW_FORM_flag_present
:
22108 fprintf_unfiltered (f
, "flag: TRUE");
22110 case DW_FORM_indirect
:
22111 /* The reader will have reduced the indirect form to
22112 the "base form" so this form should not occur. */
22113 fprintf_unfiltered (f
,
22114 "unexpected attribute form: DW_FORM_indirect");
22116 case DW_FORM_implicit_const
:
22117 fprintf_unfiltered (f
, "constant: %s",
22118 plongest (DW_SND (&die
->attrs
[i
])));
22121 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
22122 die
->attrs
[i
].form
);
22125 fprintf_unfiltered (f
, "\n");
22130 dump_die_for_error (struct die_info
*die
)
22132 dump_die_shallow (gdb_stderr
, 0, die
);
22136 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
22138 int indent
= level
* 4;
22140 gdb_assert (die
!= NULL
);
22142 if (level
>= max_level
)
22145 dump_die_shallow (f
, indent
, die
);
22147 if (die
->child
!= NULL
)
22149 print_spaces (indent
, f
);
22150 fprintf_unfiltered (f
, " Children:");
22151 if (level
+ 1 < max_level
)
22153 fprintf_unfiltered (f
, "\n");
22154 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22158 fprintf_unfiltered (f
,
22159 " [not printed, max nesting level reached]\n");
22163 if (die
->sibling
!= NULL
&& level
> 0)
22165 dump_die_1 (f
, level
, max_level
, die
->sibling
);
22169 /* This is called from the pdie macro in gdbinit.in.
22170 It's not static so gcc will keep a copy callable from gdb. */
22173 dump_die (struct die_info
*die
, int max_level
)
22175 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
22179 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
22183 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
22184 to_underlying (die
->sect_off
),
22190 /* Follow reference or signature attribute ATTR of SRC_DIE.
22191 On entry *REF_CU is the CU of SRC_DIE.
22192 On exit *REF_CU is the CU of the result. */
22194 static struct die_info
*
22195 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22196 struct dwarf2_cu
**ref_cu
)
22198 struct die_info
*die
;
22200 if (attr
->form_is_ref ())
22201 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22202 else if (attr
->form
== DW_FORM_ref_sig8
)
22203 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22206 dump_die_for_error (src_die
);
22207 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22208 objfile_name ((*ref_cu
)->per_objfile
->objfile
));
22214 /* Follow reference OFFSET.
22215 On entry *REF_CU is the CU of the source die referencing OFFSET.
22216 On exit *REF_CU is the CU of the result.
22217 Returns NULL if OFFSET is invalid. */
22219 static struct die_info
*
22220 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22221 struct dwarf2_cu
**ref_cu
)
22223 struct die_info temp_die
;
22224 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22225 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
22227 gdb_assert (cu
->per_cu
!= NULL
);
22231 if (cu
->per_cu
->is_debug_types
)
22233 /* .debug_types CUs cannot reference anything outside their CU.
22234 If they need to, they have to reference a signatured type via
22235 DW_FORM_ref_sig8. */
22236 if (!cu
->header
.offset_in_cu_p (sect_off
))
22239 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22240 || !cu
->header
.offset_in_cu_p (sect_off
))
22242 struct dwarf2_per_cu_data
*per_cu
;
22244 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22245 dwarf2_per_objfile
);
22247 /* If necessary, add it to the queue and load its DIEs. */
22248 if (maybe_queue_comp_unit (cu
, per_cu
, dwarf2_per_objfile
, cu
->language
))
22249 load_full_comp_unit (per_cu
, dwarf2_per_objfile
, false, cu
->language
);
22251 target_cu
= per_cu
->cu
;
22253 else if (cu
->dies
== NULL
)
22255 /* We're loading full DIEs during partial symbol reading. */
22256 gdb_assert (dwarf2_per_objfile
->per_bfd
->reading_partial_symbols
);
22257 load_full_comp_unit (cu
->per_cu
, dwarf2_per_objfile
, false,
22261 *ref_cu
= target_cu
;
22262 temp_die
.sect_off
= sect_off
;
22264 if (target_cu
!= cu
)
22265 target_cu
->ancestor
= cu
;
22267 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22269 to_underlying (sect_off
));
22272 /* Follow reference attribute ATTR of SRC_DIE.
22273 On entry *REF_CU is the CU of SRC_DIE.
22274 On exit *REF_CU is the CU of the result. */
22276 static struct die_info
*
22277 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22278 struct dwarf2_cu
**ref_cu
)
22280 sect_offset sect_off
= attr
->get_ref_die_offset ();
22281 struct dwarf2_cu
*cu
= *ref_cu
;
22282 struct die_info
*die
;
22284 die
= follow_die_offset (sect_off
,
22285 (attr
->form
== DW_FORM_GNU_ref_alt
22286 || cu
->per_cu
->is_dwz
),
22289 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
22290 "at %s [in module %s]"),
22291 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
22292 objfile_name (cu
->per_objfile
->objfile
));
22299 struct dwarf2_locexpr_baton
22300 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
22301 dwarf2_per_cu_data
*per_cu
,
22302 dwarf2_per_objfile
*dwarf2_per_objfile
,
22303 CORE_ADDR (*get_frame_pc
) (void *baton
),
22304 void *baton
, bool resolve_abstract_p
)
22306 struct dwarf2_cu
*cu
;
22307 struct die_info
*die
;
22308 struct attribute
*attr
;
22309 struct dwarf2_locexpr_baton retval
;
22310 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22312 if (per_cu
->cu
== NULL
)
22313 load_cu (per_cu
, dwarf2_per_objfile
, false);
22317 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22318 Instead just throw an error, not much else we can do. */
22319 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22320 sect_offset_str (sect_off
), objfile_name (objfile
));
22323 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22325 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22326 sect_offset_str (sect_off
), objfile_name (objfile
));
22328 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22329 if (!attr
&& resolve_abstract_p
22330 && (dwarf2_per_objfile
->per_bfd
->abstract_to_concrete
.find (die
->sect_off
)
22331 != dwarf2_per_objfile
->per_bfd
->abstract_to_concrete
.end ()))
22333 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22334 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
22335 struct gdbarch
*gdbarch
= objfile
->arch ();
22337 for (const auto &cand_off
22338 : dwarf2_per_objfile
->per_bfd
->abstract_to_concrete
[die
->sect_off
])
22340 struct dwarf2_cu
*cand_cu
= cu
;
22341 struct die_info
*cand
22342 = follow_die_offset (cand_off
, per_cu
->is_dwz
, &cand_cu
);
22345 || cand
->parent
->tag
!= DW_TAG_subprogram
)
22348 CORE_ADDR pc_low
, pc_high
;
22349 get_scope_pc_bounds (cand
->parent
, &pc_low
, &pc_high
, cu
);
22350 if (pc_low
== ((CORE_ADDR
) -1))
22352 pc_low
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_low
+ baseaddr
);
22353 pc_high
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_high
+ baseaddr
);
22354 if (!(pc_low
<= pc
&& pc
< pc_high
))
22358 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22365 /* DWARF: "If there is no such attribute, then there is no effect.".
22366 DATA is ignored if SIZE is 0. */
22368 retval
.data
= NULL
;
22371 else if (attr
->form_is_section_offset ())
22373 struct dwarf2_loclist_baton loclist_baton
;
22374 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22377 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
22379 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
22381 retval
.size
= size
;
22385 if (!attr
->form_is_block ())
22386 error (_("Dwarf Error: DIE at %s referenced in module %s "
22387 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
22388 sect_offset_str (sect_off
), objfile_name (objfile
));
22390 retval
.data
= DW_BLOCK (attr
)->data
;
22391 retval
.size
= DW_BLOCK (attr
)->size
;
22393 retval
.per_objfile
= dwarf2_per_objfile
;
22394 retval
.per_cu
= cu
->per_cu
;
22396 age_cached_comp_units (dwarf2_per_objfile
);
22403 struct dwarf2_locexpr_baton
22404 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
22405 dwarf2_per_cu_data
*per_cu
,
22406 dwarf2_per_objfile
*per_objfile
,
22407 CORE_ADDR (*get_frame_pc
) (void *baton
),
22410 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
22412 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, per_objfile
,
22413 get_frame_pc
, baton
);
22416 /* Write a constant of a given type as target-ordered bytes into
22419 static const gdb_byte
*
22420 write_constant_as_bytes (struct obstack
*obstack
,
22421 enum bfd_endian byte_order
,
22428 *len
= TYPE_LENGTH (type
);
22429 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22430 store_unsigned_integer (result
, *len
, byte_order
, value
);
22438 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
22439 dwarf2_per_cu_data
*per_cu
,
22440 dwarf2_per_objfile
*per_objfile
,
22444 struct dwarf2_cu
*cu
;
22445 struct die_info
*die
;
22446 struct attribute
*attr
;
22447 const gdb_byte
*result
= NULL
;
22450 enum bfd_endian byte_order
;
22451 struct objfile
*objfile
= per_objfile
->objfile
;
22453 if (per_cu
->cu
== NULL
)
22454 load_cu (per_cu
, per_objfile
, false);
22458 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22459 Instead just throw an error, not much else we can do. */
22460 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22461 sect_offset_str (sect_off
), objfile_name (objfile
));
22464 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22466 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22467 sect_offset_str (sect_off
), objfile_name (objfile
));
22469 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
22473 byte_order
= (bfd_big_endian (objfile
->obfd
)
22474 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
22476 switch (attr
->form
)
22479 case DW_FORM_addrx
:
22480 case DW_FORM_GNU_addr_index
:
22484 *len
= cu
->header
.addr_size
;
22485 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22486 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
22490 case DW_FORM_string
:
22493 case DW_FORM_GNU_str_index
:
22494 case DW_FORM_GNU_strp_alt
:
22495 /* DW_STRING is already allocated on the objfile obstack, point
22497 result
= (const gdb_byte
*) DW_STRING (attr
);
22498 *len
= strlen (DW_STRING (attr
));
22500 case DW_FORM_block1
:
22501 case DW_FORM_block2
:
22502 case DW_FORM_block4
:
22503 case DW_FORM_block
:
22504 case DW_FORM_exprloc
:
22505 case DW_FORM_data16
:
22506 result
= DW_BLOCK (attr
)->data
;
22507 *len
= DW_BLOCK (attr
)->size
;
22510 /* The DW_AT_const_value attributes are supposed to carry the
22511 symbol's value "represented as it would be on the target
22512 architecture." By the time we get here, it's already been
22513 converted to host endianness, so we just need to sign- or
22514 zero-extend it as appropriate. */
22515 case DW_FORM_data1
:
22516 type
= die_type (die
, cu
);
22517 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
22518 if (result
== NULL
)
22519 result
= write_constant_as_bytes (obstack
, byte_order
,
22522 case DW_FORM_data2
:
22523 type
= die_type (die
, cu
);
22524 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
22525 if (result
== NULL
)
22526 result
= write_constant_as_bytes (obstack
, byte_order
,
22529 case DW_FORM_data4
:
22530 type
= die_type (die
, cu
);
22531 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
22532 if (result
== NULL
)
22533 result
= write_constant_as_bytes (obstack
, byte_order
,
22536 case DW_FORM_data8
:
22537 type
= die_type (die
, cu
);
22538 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
22539 if (result
== NULL
)
22540 result
= write_constant_as_bytes (obstack
, byte_order
,
22544 case DW_FORM_sdata
:
22545 case DW_FORM_implicit_const
:
22546 type
= die_type (die
, cu
);
22547 result
= write_constant_as_bytes (obstack
, byte_order
,
22548 type
, DW_SND (attr
), len
);
22551 case DW_FORM_udata
:
22552 type
= die_type (die
, cu
);
22553 result
= write_constant_as_bytes (obstack
, byte_order
,
22554 type
, DW_UNSND (attr
), len
);
22558 complaint (_("unsupported const value attribute form: '%s'"),
22559 dwarf_form_name (attr
->form
));
22569 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
22570 dwarf2_per_cu_data
*per_cu
,
22571 dwarf2_per_objfile
*per_objfile
)
22573 struct dwarf2_cu
*cu
;
22574 struct die_info
*die
;
22576 if (per_cu
->cu
== NULL
)
22577 load_cu (per_cu
, per_objfile
, false);
22582 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22586 return die_type (die
, cu
);
22592 dwarf2_get_die_type (cu_offset die_offset
,
22593 dwarf2_per_cu_data
*per_cu
,
22594 dwarf2_per_objfile
*per_objfile
)
22596 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
22597 return get_die_type_at_offset (die_offset_sect
, per_cu
, per_objfile
);
22600 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
22601 On entry *REF_CU is the CU of SRC_DIE.
22602 On exit *REF_CU is the CU of the result.
22603 Returns NULL if the referenced DIE isn't found. */
22605 static struct die_info
*
22606 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
22607 struct dwarf2_cu
**ref_cu
)
22609 struct die_info temp_die
;
22610 struct dwarf2_cu
*sig_cu
, *cu
= *ref_cu
;
22611 struct die_info
*die
;
22612 dwarf2_per_objfile
*dwarf2_per_objfile
= (*ref_cu
)->per_objfile
;
22615 /* While it might be nice to assert sig_type->type == NULL here,
22616 we can get here for DW_AT_imported_declaration where we need
22617 the DIE not the type. */
22619 /* If necessary, add it to the queue and load its DIEs. */
22621 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, dwarf2_per_objfile
,
22623 read_signatured_type (sig_type
, dwarf2_per_objfile
);
22625 sig_cu
= sig_type
->per_cu
.cu
;
22626 gdb_assert (sig_cu
!= NULL
);
22627 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
22628 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
22629 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
22630 to_underlying (temp_die
.sect_off
));
22633 /* For .gdb_index version 7 keep track of included TUs.
22634 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
22635 if (dwarf2_per_objfile
->per_bfd
->index_table
!= NULL
22636 && dwarf2_per_objfile
->per_bfd
->index_table
->version
<= 7)
22638 (*ref_cu
)->per_cu
->imported_symtabs_push (sig_cu
->per_cu
);
22643 sig_cu
->ancestor
= cu
;
22651 /* Follow signatured type referenced by ATTR in SRC_DIE.
22652 On entry *REF_CU is the CU of SRC_DIE.
22653 On exit *REF_CU is the CU of the result.
22654 The result is the DIE of the type.
22655 If the referenced type cannot be found an error is thrown. */
22657 static struct die_info
*
22658 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22659 struct dwarf2_cu
**ref_cu
)
22661 ULONGEST signature
= DW_SIGNATURE (attr
);
22662 struct signatured_type
*sig_type
;
22663 struct die_info
*die
;
22665 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
22667 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
22668 /* sig_type will be NULL if the signatured type is missing from
22670 if (sig_type
== NULL
)
22672 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
22673 " from DIE at %s [in module %s]"),
22674 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
22675 objfile_name ((*ref_cu
)->per_objfile
->objfile
));
22678 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
22681 dump_die_for_error (src_die
);
22682 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
22683 " from DIE at %s [in module %s]"),
22684 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
22685 objfile_name ((*ref_cu
)->per_objfile
->objfile
));
22691 /* Get the type specified by SIGNATURE referenced in DIE/CU,
22692 reading in and processing the type unit if necessary. */
22694 static struct type
*
22695 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
22696 struct dwarf2_cu
*cu
)
22698 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
22699 struct signatured_type
*sig_type
;
22700 struct dwarf2_cu
*type_cu
;
22701 struct die_info
*type_die
;
22704 sig_type
= lookup_signatured_type (cu
, signature
);
22705 /* sig_type will be NULL if the signatured type is missing from
22707 if (sig_type
== NULL
)
22709 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
22710 " from DIE at %s [in module %s]"),
22711 hex_string (signature
), sect_offset_str (die
->sect_off
),
22712 objfile_name (dwarf2_per_objfile
->objfile
));
22713 return build_error_marker_type (cu
, die
);
22716 /* If we already know the type we're done. */
22717 if (sig_type
->type
!= NULL
)
22718 return sig_type
->type
;
22721 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
22722 if (type_die
!= NULL
)
22724 /* N.B. We need to call get_die_type to ensure only one type for this DIE
22725 is created. This is important, for example, because for c++ classes
22726 we need TYPE_NAME set which is only done by new_symbol. Blech. */
22727 type
= read_type_die (type_die
, type_cu
);
22730 complaint (_("Dwarf Error: Cannot build signatured type %s"
22731 " referenced from DIE at %s [in module %s]"),
22732 hex_string (signature
), sect_offset_str (die
->sect_off
),
22733 objfile_name (dwarf2_per_objfile
->objfile
));
22734 type
= build_error_marker_type (cu
, die
);
22739 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
22740 " from DIE at %s [in module %s]"),
22741 hex_string (signature
), sect_offset_str (die
->sect_off
),
22742 objfile_name (dwarf2_per_objfile
->objfile
));
22743 type
= build_error_marker_type (cu
, die
);
22745 sig_type
->type
= type
;
22750 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
22751 reading in and processing the type unit if necessary. */
22753 static struct type
*
22754 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
22755 struct dwarf2_cu
*cu
) /* ARI: editCase function */
22757 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
22758 if (attr
->form_is_ref ())
22760 struct dwarf2_cu
*type_cu
= cu
;
22761 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
22763 return read_type_die (type_die
, type_cu
);
22765 else if (attr
->form
== DW_FORM_ref_sig8
)
22767 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
22771 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
22773 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
22774 " at %s [in module %s]"),
22775 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
22776 objfile_name (dwarf2_per_objfile
->objfile
));
22777 return build_error_marker_type (cu
, die
);
22781 /* Load the DIEs associated with type unit PER_CU into memory. */
22784 load_full_type_unit (dwarf2_per_cu_data
*per_cu
,
22785 dwarf2_per_objfile
*per_objfile
)
22787 struct signatured_type
*sig_type
;
22789 /* Caller is responsible for ensuring type_unit_groups don't get here. */
22790 gdb_assert (! per_cu
->type_unit_group_p ());
22792 /* We have the per_cu, but we need the signatured_type.
22793 Fortunately this is an easy translation. */
22794 gdb_assert (per_cu
->is_debug_types
);
22795 sig_type
= (struct signatured_type
*) per_cu
;
22797 gdb_assert (per_cu
->cu
== NULL
);
22799 read_signatured_type (sig_type
, per_objfile
);
22801 gdb_assert (per_cu
->cu
!= NULL
);
22804 /* Read in a signatured type and build its CU and DIEs.
22805 If the type is a stub for the real type in a DWO file,
22806 read in the real type from the DWO file as well. */
22809 read_signatured_type (signatured_type
*sig_type
,
22810 dwarf2_per_objfile
*per_objfile
)
22812 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
22814 gdb_assert (per_cu
->is_debug_types
);
22815 gdb_assert (per_cu
->cu
== NULL
);
22817 cutu_reader
reader (per_cu
, per_objfile
, NULL
, 0, false);
22819 if (!reader
.dummy_p
)
22821 struct dwarf2_cu
*cu
= reader
.cu
;
22822 const gdb_byte
*info_ptr
= reader
.info_ptr
;
22824 gdb_assert (cu
->die_hash
== NULL
);
22826 htab_create_alloc_ex (cu
->header
.length
/ 12,
22830 &cu
->comp_unit_obstack
,
22831 hashtab_obstack_allocate
,
22832 dummy_obstack_deallocate
);
22834 if (reader
.comp_unit_die
->has_children
)
22835 reader
.comp_unit_die
->child
22836 = read_die_and_siblings (&reader
, info_ptr
, &info_ptr
,
22837 reader
.comp_unit_die
);
22838 cu
->dies
= reader
.comp_unit_die
;
22839 /* comp_unit_die is not stored in die_hash, no need. */
22841 /* We try not to read any attributes in this function, because
22842 not all CUs needed for references have been loaded yet, and
22843 symbol table processing isn't initialized. But we have to
22844 set the CU language, or we won't be able to build types
22845 correctly. Similarly, if we do not read the producer, we can
22846 not apply producer-specific interpretation. */
22847 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
22852 sig_type
->per_cu
.tu_read
= 1;
22855 /* Decode simple location descriptions.
22856 Given a pointer to a dwarf block that defines a location, compute
22857 the location and return the value. If COMPUTED is non-null, it is
22858 set to true to indicate that decoding was successful, and false
22859 otherwise. If COMPUTED is null, then this function may emit a
22863 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
, bool *computed
)
22865 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
22867 size_t size
= blk
->size
;
22868 const gdb_byte
*data
= blk
->data
;
22869 CORE_ADDR stack
[64];
22871 unsigned int bytes_read
, unsnd
;
22874 if (computed
!= nullptr)
22880 stack
[++stacki
] = 0;
22919 stack
[++stacki
] = op
- DW_OP_lit0
;
22954 stack
[++stacki
] = op
- DW_OP_reg0
;
22957 if (computed
== nullptr)
22958 dwarf2_complex_location_expr_complaint ();
22965 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
22967 stack
[++stacki
] = unsnd
;
22970 if (computed
== nullptr)
22971 dwarf2_complex_location_expr_complaint ();
22978 stack
[++stacki
] = cu
->header
.read_address (objfile
->obfd
, &data
[i
],
22983 case DW_OP_const1u
:
22984 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
22988 case DW_OP_const1s
:
22989 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
22993 case DW_OP_const2u
:
22994 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
22998 case DW_OP_const2s
:
22999 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
23003 case DW_OP_const4u
:
23004 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
23008 case DW_OP_const4s
:
23009 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
23013 case DW_OP_const8u
:
23014 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
23019 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
23025 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
23030 stack
[stacki
+ 1] = stack
[stacki
];
23035 stack
[stacki
- 1] += stack
[stacki
];
23039 case DW_OP_plus_uconst
:
23040 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
23046 stack
[stacki
- 1] -= stack
[stacki
];
23051 /* If we're not the last op, then we definitely can't encode
23052 this using GDB's address_class enum. This is valid for partial
23053 global symbols, although the variable's address will be bogus
23057 if (computed
== nullptr)
23058 dwarf2_complex_location_expr_complaint ();
23064 case DW_OP_GNU_push_tls_address
:
23065 case DW_OP_form_tls_address
:
23066 /* The top of the stack has the offset from the beginning
23067 of the thread control block at which the variable is located. */
23068 /* Nothing should follow this operator, so the top of stack would
23070 /* This is valid for partial global symbols, but the variable's
23071 address will be bogus in the psymtab. Make it always at least
23072 non-zero to not look as a variable garbage collected by linker
23073 which have DW_OP_addr 0. */
23076 if (computed
== nullptr)
23077 dwarf2_complex_location_expr_complaint ();
23084 case DW_OP_GNU_uninit
:
23085 if (computed
!= nullptr)
23090 case DW_OP_GNU_addr_index
:
23091 case DW_OP_GNU_const_index
:
23092 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
23098 if (computed
== nullptr)
23100 const char *name
= get_DW_OP_name (op
);
23103 complaint (_("unsupported stack op: '%s'"),
23106 complaint (_("unsupported stack op: '%02x'"),
23110 return (stack
[stacki
]);
23113 /* Enforce maximum stack depth of SIZE-1 to avoid writing
23114 outside of the allocated space. Also enforce minimum>0. */
23115 if (stacki
>= ARRAY_SIZE (stack
) - 1)
23117 if (computed
== nullptr)
23118 complaint (_("location description stack overflow"));
23124 if (computed
== nullptr)
23125 complaint (_("location description stack underflow"));
23130 if (computed
!= nullptr)
23132 return (stack
[stacki
]);
23135 /* memory allocation interface */
23137 static struct dwarf_block
*
23138 dwarf_alloc_block (struct dwarf2_cu
*cu
)
23140 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
23143 static struct die_info
*
23144 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
23146 struct die_info
*die
;
23147 size_t size
= sizeof (struct die_info
);
23150 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
23152 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
23153 memset (die
, 0, sizeof (struct die_info
));
23159 /* Macro support. */
23161 /* An overload of dwarf_decode_macros that finds the correct section
23162 and ensures it is read in before calling the other overload. */
23165 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
23166 int section_is_gnu
)
23168 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
23169 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23170 const struct line_header
*lh
= cu
->line_header
;
23171 unsigned int offset_size
= cu
->header
.offset_size
;
23172 struct dwarf2_section_info
*section
;
23173 const char *section_name
;
23175 if (cu
->dwo_unit
!= nullptr)
23177 if (section_is_gnu
)
23179 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
23180 section_name
= ".debug_macro.dwo";
23184 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
23185 section_name
= ".debug_macinfo.dwo";
23190 if (section_is_gnu
)
23192 section
= &dwarf2_per_objfile
->per_bfd
->macro
;
23193 section_name
= ".debug_macro";
23197 section
= &dwarf2_per_objfile
->per_bfd
->macinfo
;
23198 section_name
= ".debug_macinfo";
23202 section
->read (objfile
);
23203 if (section
->buffer
== nullptr)
23205 complaint (_("missing %s section"), section_name
);
23209 buildsym_compunit
*builder
= cu
->get_builder ();
23211 dwarf_decode_macros (dwarf2_per_objfile
, builder
, section
, lh
,
23212 offset_size
, offset
, section_is_gnu
);
23215 /* Return the .debug_loc section to use for CU.
23216 For DWO files use .debug_loc.dwo. */
23218 static struct dwarf2_section_info
*
23219 cu_debug_loc_section (struct dwarf2_cu
*cu
)
23221 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
23225 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
23227 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
23229 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->per_bfd
->loclists
23230 : &dwarf2_per_objfile
->per_bfd
->loc
);
23233 /* A helper function that fills in a dwarf2_loclist_baton. */
23236 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
23237 struct dwarf2_loclist_baton
*baton
,
23238 const struct attribute
*attr
)
23240 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
23241 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23243 section
->read (dwarf2_per_objfile
->objfile
);
23245 baton
->per_objfile
= dwarf2_per_objfile
;
23246 baton
->per_cu
= cu
->per_cu
;
23247 gdb_assert (baton
->per_cu
);
23248 /* We don't know how long the location list is, but make sure we
23249 don't run off the edge of the section. */
23250 baton
->size
= section
->size
- DW_UNSND (attr
);
23251 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
23252 if (cu
->base_address
.has_value ())
23253 baton
->base_address
= *cu
->base_address
;
23255 baton
->base_address
= 0;
23256 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
23260 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
23261 struct dwarf2_cu
*cu
, int is_block
)
23263 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
23264 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23265 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23267 if (attr
->form_is_section_offset ()
23268 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
23269 the section. If so, fall through to the complaint in the
23271 && DW_UNSND (attr
) < section
->get_size (objfile
))
23273 struct dwarf2_loclist_baton
*baton
;
23275 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
23277 fill_in_loclist_baton (cu
, baton
, attr
);
23279 if (!cu
->base_address
.has_value ())
23280 complaint (_("Location list used without "
23281 "specifying the CU base address."));
23283 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23284 ? dwarf2_loclist_block_index
23285 : dwarf2_loclist_index
);
23286 SYMBOL_LOCATION_BATON (sym
) = baton
;
23290 struct dwarf2_locexpr_baton
*baton
;
23292 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
23293 baton
->per_objfile
= dwarf2_per_objfile
;
23294 baton
->per_cu
= cu
->per_cu
;
23295 gdb_assert (baton
->per_cu
);
23297 if (attr
->form_is_block ())
23299 /* Note that we're just copying the block's data pointer
23300 here, not the actual data. We're still pointing into the
23301 info_buffer for SYM's objfile; right now we never release
23302 that buffer, but when we do clean up properly this may
23304 baton
->size
= DW_BLOCK (attr
)->size
;
23305 baton
->data
= DW_BLOCK (attr
)->data
;
23309 dwarf2_invalid_attrib_class_complaint ("location description",
23310 sym
->natural_name ());
23314 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23315 ? dwarf2_locexpr_block_index
23316 : dwarf2_locexpr_index
);
23317 SYMBOL_LOCATION_BATON (sym
) = baton
;
23321 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
23322 (CU_HEADERP is unused in such case) or prepare a temporary copy at
23323 CU_HEADERP first. */
23325 static const struct comp_unit_head
*
23326 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
23327 const struct dwarf2_per_cu_data
*per_cu
)
23329 const gdb_byte
*info_ptr
;
23332 return &per_cu
->cu
->header
;
23334 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
23336 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
23337 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
23338 rcuh_kind::COMPILE
);
23346 dwarf2_per_cu_data::addr_size () const
23348 struct comp_unit_head cu_header_local
;
23349 const struct comp_unit_head
*cu_headerp
;
23351 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23353 return cu_headerp
->addr_size
;
23359 dwarf2_per_cu_data::offset_size () const
23361 struct comp_unit_head cu_header_local
;
23362 const struct comp_unit_head
*cu_headerp
;
23364 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23366 return cu_headerp
->offset_size
;
23372 dwarf2_per_cu_data::ref_addr_size () const
23374 struct comp_unit_head cu_header_local
;
23375 const struct comp_unit_head
*cu_headerp
;
23377 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23379 if (cu_headerp
->version
== 2)
23380 return cu_headerp
->addr_size
;
23382 return cu_headerp
->offset_size
;
23388 dwarf2_cu::addr_type () const
23390 struct objfile
*objfile
= this->per_objfile
->objfile
;
23391 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
23392 struct type
*addr_type
= lookup_pointer_type (void_type
);
23393 int addr_size
= this->per_cu
->addr_size ();
23395 if (TYPE_LENGTH (addr_type
) == addr_size
)
23398 addr_type
= addr_sized_int_type (TYPE_UNSIGNED (addr_type
));
23402 /* A helper function for dwarf2_find_containing_comp_unit that returns
23403 the index of the result, and that searches a vector. It will
23404 return a result even if the offset in question does not actually
23405 occur in any CU. This is separate so that it can be unit
23409 dwarf2_find_containing_comp_unit
23410 (sect_offset sect_off
,
23411 unsigned int offset_in_dwz
,
23412 const std::vector
<dwarf2_per_cu_data
*> &all_comp_units
)
23417 high
= all_comp_units
.size () - 1;
23420 struct dwarf2_per_cu_data
*mid_cu
;
23421 int mid
= low
+ (high
- low
) / 2;
23423 mid_cu
= all_comp_units
[mid
];
23424 if (mid_cu
->is_dwz
> offset_in_dwz
23425 || (mid_cu
->is_dwz
== offset_in_dwz
23426 && mid_cu
->sect_off
+ mid_cu
->length
> sect_off
))
23431 gdb_assert (low
== high
);
23435 /* Locate the .debug_info compilation unit from CU's objfile which contains
23436 the DIE at OFFSET. Raises an error on failure. */
23438 static struct dwarf2_per_cu_data
*
23439 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
23440 unsigned int offset_in_dwz
,
23441 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
23444 = dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
23445 dwarf2_per_objfile
->per_bfd
->all_comp_units
);
23446 struct dwarf2_per_cu_data
*this_cu
23447 = dwarf2_per_objfile
->per_bfd
->all_comp_units
[low
];
23449 if (this_cu
->is_dwz
!= offset_in_dwz
|| this_cu
->sect_off
> sect_off
)
23451 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
23452 error (_("Dwarf Error: could not find partial DIE containing "
23453 "offset %s [in module %s]"),
23454 sect_offset_str (sect_off
),
23455 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
23457 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_comp_units
[low
-1]->sect_off
23459 return dwarf2_per_objfile
->per_bfd
->all_comp_units
[low
-1];
23463 if (low
== dwarf2_per_objfile
->per_bfd
->all_comp_units
.size () - 1
23464 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
23465 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
23466 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
23473 namespace selftests
{
23474 namespace find_containing_comp_unit
{
23479 struct dwarf2_per_cu_data one
{};
23480 struct dwarf2_per_cu_data two
{};
23481 struct dwarf2_per_cu_data three
{};
23482 struct dwarf2_per_cu_data four
{};
23485 two
.sect_off
= sect_offset (one
.length
);
23490 four
.sect_off
= sect_offset (three
.length
);
23494 std::vector
<dwarf2_per_cu_data
*> units
;
23495 units
.push_back (&one
);
23496 units
.push_back (&two
);
23497 units
.push_back (&three
);
23498 units
.push_back (&four
);
23502 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 0, units
);
23503 SELF_CHECK (units
[result
] == &one
);
23504 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 0, units
);
23505 SELF_CHECK (units
[result
] == &one
);
23506 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 0, units
);
23507 SELF_CHECK (units
[result
] == &two
);
23509 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 1, units
);
23510 SELF_CHECK (units
[result
] == &three
);
23511 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 1, units
);
23512 SELF_CHECK (units
[result
] == &three
);
23513 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 1, units
);
23514 SELF_CHECK (units
[result
] == &four
);
23520 #endif /* GDB_SELF_TEST */
23522 /* Initialize dwarf2_cu to read PER_CU, in the context of PER_OBJFILE. */
23524 dwarf2_cu::dwarf2_cu (dwarf2_per_cu_data
*per_cu
,
23525 dwarf2_per_objfile
*per_objfile
)
23527 per_objfile (per_objfile
),
23529 has_loclist (false),
23530 checked_producer (false),
23531 producer_is_gxx_lt_4_6 (false),
23532 producer_is_gcc_lt_4_3 (false),
23533 producer_is_icc (false),
23534 producer_is_icc_lt_14 (false),
23535 producer_is_codewarrior (false),
23536 processing_has_namespace_info (false)
23541 /* Destroy a dwarf2_cu. */
23543 dwarf2_cu::~dwarf2_cu ()
23548 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
23551 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
23552 enum language pretend_language
)
23554 struct attribute
*attr
;
23556 /* Set the language we're debugging. */
23557 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
23558 if (attr
!= nullptr)
23559 set_cu_language (DW_UNSND (attr
), cu
);
23562 cu
->language
= pretend_language
;
23563 cu
->language_defn
= language_def (cu
->language
);
23566 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
23569 /* Increase the age counter on each cached compilation unit, and free
23570 any that are too old. */
23573 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
23575 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23577 dwarf2_clear_marks (dwarf2_per_objfile
->per_bfd
->read_in_chain
);
23578 per_cu
= dwarf2_per_objfile
->per_bfd
->read_in_chain
;
23579 while (per_cu
!= NULL
)
23581 per_cu
->cu
->last_used
++;
23582 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
23583 dwarf2_mark (per_cu
->cu
);
23584 per_cu
= per_cu
->cu
->read_in_chain
;
23587 per_cu
= dwarf2_per_objfile
->per_bfd
->read_in_chain
;
23588 last_chain
= &dwarf2_per_objfile
->per_bfd
->read_in_chain
;
23589 while (per_cu
!= NULL
)
23591 struct dwarf2_per_cu_data
*next_cu
;
23593 next_cu
= per_cu
->cu
->read_in_chain
;
23595 if (!per_cu
->cu
->mark
)
23598 *last_chain
= next_cu
;
23601 last_chain
= &per_cu
->cu
->read_in_chain
;
23607 /* Remove a single compilation unit from the cache. */
23610 free_one_cached_comp_unit (dwarf2_per_cu_data
*target_per_cu
,
23611 dwarf2_per_objfile
*dwarf2_per_objfile
)
23613 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23615 per_cu
= dwarf2_per_objfile
->per_bfd
->read_in_chain
;
23616 last_chain
= &dwarf2_per_objfile
->per_bfd
->read_in_chain
;
23617 while (per_cu
!= NULL
)
23619 struct dwarf2_per_cu_data
*next_cu
;
23621 next_cu
= per_cu
->cu
->read_in_chain
;
23623 if (per_cu
== target_per_cu
)
23627 *last_chain
= next_cu
;
23631 last_chain
= &per_cu
->cu
->read_in_chain
;
23637 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
23638 We store these in a hash table separate from the DIEs, and preserve them
23639 when the DIEs are flushed out of cache.
23641 The CU "per_cu" pointer is needed because offset alone is not enough to
23642 uniquely identify the type. A file may have multiple .debug_types sections,
23643 or the type may come from a DWO file. Furthermore, while it's more logical
23644 to use per_cu->section+offset, with Fission the section with the data is in
23645 the DWO file but we don't know that section at the point we need it.
23646 We have to use something in dwarf2_per_cu_data (or the pointer to it)
23647 because we can enter the lookup routine, get_die_type_at_offset, from
23648 outside this file, and thus won't necessarily have PER_CU->cu.
23649 Fortunately, PER_CU is stable for the life of the objfile. */
23651 struct dwarf2_per_cu_offset_and_type
23653 const struct dwarf2_per_cu_data
*per_cu
;
23654 sect_offset sect_off
;
23658 /* Hash function for a dwarf2_per_cu_offset_and_type. */
23661 per_cu_offset_and_type_hash (const void *item
)
23663 const struct dwarf2_per_cu_offset_and_type
*ofs
23664 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
23666 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
23669 /* Equality function for a dwarf2_per_cu_offset_and_type. */
23672 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
23674 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
23675 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
23676 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
23677 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
23679 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
23680 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
23683 /* Set the type associated with DIE to TYPE. Save it in CU's hash
23684 table if necessary. For convenience, return TYPE.
23686 The DIEs reading must have careful ordering to:
23687 * Not cause infinite loops trying to read in DIEs as a prerequisite for
23688 reading current DIE.
23689 * Not trying to dereference contents of still incompletely read in types
23690 while reading in other DIEs.
23691 * Enable referencing still incompletely read in types just by a pointer to
23692 the type without accessing its fields.
23694 Therefore caller should follow these rules:
23695 * Try to fetch any prerequisite types we may need to build this DIE type
23696 before building the type and calling set_die_type.
23697 * After building type call set_die_type for current DIE as soon as
23698 possible before fetching more types to complete the current type.
23699 * Make the type as complete as possible before fetching more types. */
23701 static struct type
*
23702 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
23704 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
23705 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
23706 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23707 struct attribute
*attr
;
23708 struct dynamic_prop prop
;
23710 /* For Ada types, make sure that the gnat-specific data is always
23711 initialized (if not already set). There are a few types where
23712 we should not be doing so, because the type-specific area is
23713 already used to hold some other piece of info (eg: TYPE_CODE_FLT
23714 where the type-specific area is used to store the floatformat).
23715 But this is not a problem, because the gnat-specific information
23716 is actually not needed for these types. */
23717 if (need_gnat_info (cu
)
23718 && type
->code () != TYPE_CODE_FUNC
23719 && type
->code () != TYPE_CODE_FLT
23720 && type
->code () != TYPE_CODE_METHODPTR
23721 && type
->code () != TYPE_CODE_MEMBERPTR
23722 && type
->code () != TYPE_CODE_METHOD
23723 && !HAVE_GNAT_AUX_INFO (type
))
23724 INIT_GNAT_SPECIFIC (type
);
23726 /* Read DW_AT_allocated and set in type. */
23727 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
23728 if (attr
!= NULL
&& attr
->form_is_block ())
23730 struct type
*prop_type
= cu
->addr_sized_int_type (false);
23731 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
23732 type
->add_dyn_prop (DYN_PROP_ALLOCATED
, prop
);
23734 else if (attr
!= NULL
)
23736 complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
23737 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23738 sect_offset_str (die
->sect_off
));
23741 /* Read DW_AT_associated and set in type. */
23742 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
23743 if (attr
!= NULL
&& attr
->form_is_block ())
23745 struct type
*prop_type
= cu
->addr_sized_int_type (false);
23746 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
23747 type
->add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
);
23749 else if (attr
!= NULL
)
23751 complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
23752 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23753 sect_offset_str (die
->sect_off
));
23756 /* Read DW_AT_data_location and set in type. */
23757 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
23758 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, cu
->addr_type ()))
23759 type
->add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
);
23761 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23762 dwarf2_per_objfile
->die_type_hash
23763 = htab_up (htab_create_alloc (127,
23764 per_cu_offset_and_type_hash
,
23765 per_cu_offset_and_type_eq
,
23766 NULL
, xcalloc
, xfree
));
23768 ofs
.per_cu
= cu
->per_cu
;
23769 ofs
.sect_off
= die
->sect_off
;
23771 slot
= (struct dwarf2_per_cu_offset_and_type
**)
23772 htab_find_slot (dwarf2_per_objfile
->die_type_hash
.get (), &ofs
, INSERT
);
23774 complaint (_("A problem internal to GDB: DIE %s has type already set"),
23775 sect_offset_str (die
->sect_off
));
23776 *slot
= XOBNEW (&objfile
->objfile_obstack
,
23777 struct dwarf2_per_cu_offset_and_type
);
23782 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
23783 or return NULL if the die does not have a saved type. */
23785 static struct type
*
23786 get_die_type_at_offset (sect_offset sect_off
,
23787 dwarf2_per_cu_data
*per_cu
,
23788 dwarf2_per_objfile
*dwarf2_per_objfile
)
23790 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
23792 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23795 ofs
.per_cu
= per_cu
;
23796 ofs
.sect_off
= sect_off
;
23797 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
23798 htab_find (dwarf2_per_objfile
->die_type_hash
.get (), &ofs
));
23805 /* Look up the type for DIE in CU in die_type_hash,
23806 or return NULL if DIE does not have a saved type. */
23808 static struct type
*
23809 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
23811 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
, cu
->per_objfile
);
23814 /* Add a dependence relationship from CU to REF_PER_CU. */
23817 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
23818 struct dwarf2_per_cu_data
*ref_per_cu
)
23822 if (cu
->dependencies
== NULL
)
23824 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
23825 NULL
, &cu
->comp_unit_obstack
,
23826 hashtab_obstack_allocate
,
23827 dummy_obstack_deallocate
);
23829 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
23831 *slot
= ref_per_cu
;
23834 /* Subroutine of dwarf2_mark to pass to htab_traverse.
23835 Set the mark field in every compilation unit in the
23836 cache that we must keep because we are keeping CU. */
23839 dwarf2_mark_helper (void **slot
, void *data
)
23841 struct dwarf2_per_cu_data
*per_cu
;
23843 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
23845 /* cu->dependencies references may not yet have been ever read if QUIT aborts
23846 reading of the chain. As such dependencies remain valid it is not much
23847 useful to track and undo them during QUIT cleanups. */
23848 if (per_cu
->cu
== NULL
)
23851 if (per_cu
->cu
->mark
)
23853 per_cu
->cu
->mark
= true;
23855 if (per_cu
->cu
->dependencies
!= NULL
)
23856 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23861 /* Set the mark field in CU and in every other compilation unit in the
23862 cache that we must keep because we are keeping CU. */
23865 dwarf2_mark (struct dwarf2_cu
*cu
)
23870 if (cu
->dependencies
!= NULL
)
23871 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23875 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
23879 per_cu
->cu
->mark
= false;
23880 per_cu
= per_cu
->cu
->read_in_chain
;
23884 /* Trivial hash function for partial_die_info: the hash value of a DIE
23885 is its offset in .debug_info for this objfile. */
23888 partial_die_hash (const void *item
)
23890 const struct partial_die_info
*part_die
23891 = (const struct partial_die_info
*) item
;
23893 return to_underlying (part_die
->sect_off
);
23896 /* Trivial comparison function for partial_die_info structures: two DIEs
23897 are equal if they have the same offset. */
23900 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
23902 const struct partial_die_info
*part_die_lhs
23903 = (const struct partial_die_info
*) item_lhs
;
23904 const struct partial_die_info
*part_die_rhs
23905 = (const struct partial_die_info
*) item_rhs
;
23907 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
23910 struct cmd_list_element
*set_dwarf_cmdlist
;
23911 struct cmd_list_element
*show_dwarf_cmdlist
;
23914 show_check_physname (struct ui_file
*file
, int from_tty
,
23915 struct cmd_list_element
*c
, const char *value
)
23917 fprintf_filtered (file
,
23918 _("Whether to check \"physname\" is %s.\n"),
23922 void _initialize_dwarf2_read ();
23924 _initialize_dwarf2_read ()
23926 add_basic_prefix_cmd ("dwarf", class_maintenance
, _("\
23927 Set DWARF specific variables.\n\
23928 Configure DWARF variables such as the cache size."),
23929 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23930 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23932 add_show_prefix_cmd ("dwarf", class_maintenance
, _("\
23933 Show DWARF specific variables.\n\
23934 Show DWARF variables such as the cache size."),
23935 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23936 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23938 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23939 &dwarf_max_cache_age
, _("\
23940 Set the upper bound on the age of cached DWARF compilation units."), _("\
23941 Show the upper bound on the age of cached DWARF compilation units."), _("\
23942 A higher limit means that cached compilation units will be stored\n\
23943 in memory longer, and more total memory will be used. Zero disables\n\
23944 caching, which can slow down startup."),
23946 show_dwarf_max_cache_age
,
23947 &set_dwarf_cmdlist
,
23948 &show_dwarf_cmdlist
);
23950 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23951 Set debugging of the DWARF reader."), _("\
23952 Show debugging of the DWARF reader."), _("\
23953 When enabled (non-zero), debugging messages are printed during DWARF\n\
23954 reading and symtab expansion. A value of 1 (one) provides basic\n\
23955 information. A value greater than 1 provides more verbose information."),
23958 &setdebuglist
, &showdebuglist
);
23960 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23961 Set debugging of the DWARF DIE reader."), _("\
23962 Show debugging of the DWARF DIE reader."), _("\
23963 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23964 The value is the maximum depth to print."),
23967 &setdebuglist
, &showdebuglist
);
23969 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23970 Set debugging of the dwarf line reader."), _("\
23971 Show debugging of the dwarf line reader."), _("\
23972 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23973 A value of 1 (one) provides basic information.\n\
23974 A value greater than 1 provides more verbose information."),
23977 &setdebuglist
, &showdebuglist
);
23979 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23980 Set cross-checking of \"physname\" code against demangler."), _("\
23981 Show cross-checking of \"physname\" code against demangler."), _("\
23982 When enabled, GDB's internal \"physname\" code is checked against\n\
23984 NULL
, show_check_physname
,
23985 &setdebuglist
, &showdebuglist
);
23987 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23988 no_class
, &use_deprecated_index_sections
, _("\
23989 Set whether to use deprecated gdb_index sections."), _("\
23990 Show whether to use deprecated gdb_index sections."), _("\
23991 When enabled, deprecated .gdb_index sections are used anyway.\n\
23992 Normally they are ignored either because of a missing feature or\n\
23993 performance issue.\n\
23994 Warning: This option must be enabled before gdb reads the file."),
23997 &setlist
, &showlist
);
23999 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
24000 &dwarf2_locexpr_funcs
);
24001 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
24002 &dwarf2_loclist_funcs
);
24004 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
24005 &dwarf2_block_frame_base_locexpr_funcs
);
24006 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
24007 &dwarf2_block_frame_base_loclist_funcs
);
24010 selftests::register_test ("dw2_expand_symtabs_matching",
24011 selftests::dw2_expand_symtabs_matching::run_test
);
24012 selftests::register_test ("dwarf2_find_containing_comp_unit",
24013 selftests::find_containing_comp_unit::run_test
);