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 /* The header of the compilation unit. */
425 struct comp_unit_head header
{};
427 /* Base address of this compilation unit. */
428 gdb::optional
<CORE_ADDR
> base_address
;
430 /* The language we are debugging. */
431 enum language language
= language_unknown
;
432 const struct language_defn
*language_defn
= nullptr;
434 const char *producer
= nullptr;
437 /* The symtab builder for this CU. This is only non-NULL when full
438 symbols are being read. */
439 std::unique_ptr
<buildsym_compunit
> m_builder
;
442 /* The generic symbol table building routines have separate lists for
443 file scope symbols and all all other scopes (local scopes). So
444 we need to select the right one to pass to add_symbol_to_list().
445 We do it by keeping a pointer to the correct list in list_in_scope.
447 FIXME: The original dwarf code just treated the file scope as the
448 first local scope, and all other local scopes as nested local
449 scopes, and worked fine. Check to see if we really need to
450 distinguish these in buildsym.c. */
451 struct pending
**list_in_scope
= nullptr;
453 /* Hash table holding all the loaded partial DIEs
454 with partial_die->offset.SECT_OFF as hash. */
455 htab_t partial_dies
= nullptr;
457 /* Storage for things with the same lifetime as this read-in compilation
458 unit, including partial DIEs. */
459 auto_obstack comp_unit_obstack
;
461 /* When multiple dwarf2_cu structures are living in memory, this field
462 chains them all together, so that they can be released efficiently.
463 We will probably also want a generation counter so that most-recently-used
464 compilation units are cached... */
465 struct dwarf2_per_cu_data
*read_in_chain
= nullptr;
467 /* Backlink to our per_cu entry. */
468 struct dwarf2_per_cu_data
*per_cu
;
470 /* The dwarf2_per_objfile that owns this. */
471 struct dwarf2_per_objfile
*per_objfile
;
473 /* How many compilation units ago was this CU last referenced? */
476 /* A hash table of DIE cu_offset for following references with
477 die_info->offset.sect_off as hash. */
478 htab_t die_hash
= nullptr;
480 /* Full DIEs if read in. */
481 struct die_info
*dies
= nullptr;
483 /* A set of pointers to dwarf2_per_cu_data objects for compilation
484 units referenced by this one. Only set during full symbol processing;
485 partial symbol tables do not have dependencies. */
486 htab_t dependencies
= nullptr;
488 /* Header data from the line table, during full symbol processing. */
489 struct line_header
*line_header
= nullptr;
490 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
491 it's owned by dwarf2_per_bfd::line_header_hash. If non-NULL,
492 this is the DW_TAG_compile_unit die for this CU. We'll hold on
493 to the line header as long as this DIE is being processed. See
494 process_die_scope. */
495 die_info
*line_header_die_owner
= nullptr;
497 /* A list of methods which need to have physnames computed
498 after all type information has been read. */
499 std::vector
<delayed_method_info
> method_list
;
501 /* To be copied to symtab->call_site_htab. */
502 htab_t call_site_htab
= nullptr;
504 /* Non-NULL if this CU came from a DWO file.
505 There is an invariant here that is important to remember:
506 Except for attributes copied from the top level DIE in the "main"
507 (or "stub") file in preparation for reading the DWO file
508 (e.g., DW_AT_addr_base), we KISS: there is only *one* CU.
509 Either there isn't a DWO file (in which case this is NULL and the point
510 is moot), or there is and either we're not going to read it (in which
511 case this is NULL) or there is and we are reading it (in which case this
513 struct dwo_unit
*dwo_unit
= nullptr;
515 /* The DW_AT_addr_base (DW_AT_GNU_addr_base) attribute if present.
516 Note this value comes from the Fission stub CU/TU's DIE. */
517 gdb::optional
<ULONGEST
> addr_base
;
519 /* The DW_AT_rnglists_base attribute if present.
520 Note this value comes from the Fission stub CU/TU's DIE.
521 Also note that the value is zero in the non-DWO case so this value can
522 be used without needing to know whether DWO files are in use or not.
523 N.B. This does not apply to DW_AT_ranges appearing in
524 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
525 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
526 DW_AT_rnglists_base *would* have to be applied, and we'd have to care
527 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
528 ULONGEST ranges_base
= 0;
530 /* The DW_AT_loclists_base attribute if present. */
531 ULONGEST loclist_base
= 0;
533 /* When reading debug info generated by older versions of rustc, we
534 have to rewrite some union types to be struct types with a
535 variant part. This rewriting must be done after the CU is fully
536 read in, because otherwise at the point of rewriting some struct
537 type might not have been fully processed. So, we keep a list of
538 all such types here and process them after expansion. */
539 std::vector
<struct type
*> rust_unions
;
541 /* The DW_AT_str_offsets_base attribute if present. For DWARF 4 version DWO
542 files, the value is implicitly zero. For DWARF 5 version DWO files, the
543 value is often implicit and is the size of the header of
544 .debug_str_offsets section (8 or 4, depending on the address size). */
545 gdb::optional
<ULONGEST
> str_offsets_base
;
547 /* Mark used when releasing cached dies. */
550 /* This CU references .debug_loc. See the symtab->locations_valid field.
551 This test is imperfect as there may exist optimized debug code not using
552 any location list and still facing inlining issues if handled as
553 unoptimized code. For a future better test see GCC PR other/32998. */
554 bool has_loclist
: 1;
556 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is true
557 if all the producer_is_* fields are valid. This information is cached
558 because profiling CU expansion showed excessive time spent in
559 producer_is_gxx_lt_4_6. */
560 bool checked_producer
: 1;
561 bool producer_is_gxx_lt_4_6
: 1;
562 bool producer_is_gcc_lt_4_3
: 1;
563 bool producer_is_icc
: 1;
564 bool producer_is_icc_lt_14
: 1;
565 bool producer_is_codewarrior
: 1;
567 /* When true, the file that we're processing is known to have
568 debugging info for C++ namespaces. GCC 3.3.x did not produce
569 this information, but later versions do. */
571 bool processing_has_namespace_info
: 1;
573 struct partial_die_info
*find_partial_die (sect_offset sect_off
);
575 /* If this CU was inherited by another CU (via specification,
576 abstract_origin, etc), this is the ancestor CU. */
579 /* Get the buildsym_compunit for this CU. */
580 buildsym_compunit
*get_builder ()
582 /* If this CU has a builder associated with it, use that. */
583 if (m_builder
!= nullptr)
584 return m_builder
.get ();
586 /* Otherwise, search ancestors for a valid builder. */
587 if (ancestor
!= nullptr)
588 return ancestor
->get_builder ();
594 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
595 This includes type_unit_group and quick_file_names. */
597 struct stmt_list_hash
599 /* The DWO unit this table is from or NULL if there is none. */
600 struct dwo_unit
*dwo_unit
;
602 /* Offset in .debug_line or .debug_line.dwo. */
603 sect_offset line_sect_off
;
606 /* Each element of dwarf2_per_bfd->type_unit_groups is a pointer to
607 an object of this type. */
609 struct type_unit_group
611 /* dwarf2read.c's main "handle" on a TU symtab.
612 To simplify things we create an artificial CU that "includes" all the
613 type units using this stmt_list so that the rest of the code still has
614 a "per_cu" handle on the symtab. */
615 struct dwarf2_per_cu_data per_cu
;
617 /* The TUs that share this DW_AT_stmt_list entry.
618 This is added to while parsing type units to build partial symtabs,
619 and is deleted afterwards and not used again. */
620 std::vector
<signatured_type
*> *tus
;
622 /* The compunit symtab.
623 Type units in a group needn't all be defined in the same source file,
624 so we create an essentially anonymous symtab as the compunit symtab. */
625 struct compunit_symtab
*compunit_symtab
;
627 /* The data used to construct the hash key. */
628 struct stmt_list_hash hash
;
630 /* The symbol tables for this TU (obtained from the files listed in
632 WARNING: The order of entries here must match the order of entries
633 in the line header. After the first TU using this type_unit_group, the
634 line header for the subsequent TUs is recreated from this. This is done
635 because we need to use the same symtabs for each TU using the same
636 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
637 there's no guarantee the line header doesn't have duplicate entries. */
638 struct symtab
**symtabs
;
641 /* These sections are what may appear in a (real or virtual) DWO file. */
645 struct dwarf2_section_info abbrev
;
646 struct dwarf2_section_info line
;
647 struct dwarf2_section_info loc
;
648 struct dwarf2_section_info loclists
;
649 struct dwarf2_section_info macinfo
;
650 struct dwarf2_section_info macro
;
651 struct dwarf2_section_info str
;
652 struct dwarf2_section_info str_offsets
;
653 /* In the case of a virtual DWO file, these two are unused. */
654 struct dwarf2_section_info info
;
655 std::vector
<dwarf2_section_info
> types
;
658 /* CUs/TUs in DWP/DWO files. */
662 /* Backlink to the containing struct dwo_file. */
663 struct dwo_file
*dwo_file
;
665 /* The "id" that distinguishes this CU/TU.
666 .debug_info calls this "dwo_id", .debug_types calls this "signature".
667 Since signatures came first, we stick with it for consistency. */
670 /* The section this CU/TU lives in, in the DWO file. */
671 struct dwarf2_section_info
*section
;
673 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
674 sect_offset sect_off
;
677 /* For types, offset in the type's DIE of the type defined by this TU. */
678 cu_offset type_offset_in_tu
;
681 /* include/dwarf2.h defines the DWP section codes.
682 It defines a max value but it doesn't define a min value, which we
683 use for error checking, so provide one. */
685 enum dwp_v2_section_ids
690 /* Data for one DWO file.
692 This includes virtual DWO files (a virtual DWO file is a DWO file as it
693 appears in a DWP file). DWP files don't really have DWO files per se -
694 comdat folding of types "loses" the DWO file they came from, and from
695 a high level view DWP files appear to contain a mass of random types.
696 However, to maintain consistency with the non-DWP case we pretend DWP
697 files contain virtual DWO files, and we assign each TU with one virtual
698 DWO file (generally based on the line and abbrev section offsets -
699 a heuristic that seems to work in practice). */
703 dwo_file () = default;
704 DISABLE_COPY_AND_ASSIGN (dwo_file
);
706 /* The DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute.
707 For virtual DWO files the name is constructed from the section offsets
708 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
709 from related CU+TUs. */
710 const char *dwo_name
= nullptr;
712 /* The DW_AT_comp_dir attribute. */
713 const char *comp_dir
= nullptr;
715 /* The bfd, when the file is open. Otherwise this is NULL.
716 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
717 gdb_bfd_ref_ptr dbfd
;
719 /* The sections that make up this DWO file.
720 Remember that for virtual DWO files in DWP V2, these are virtual
721 sections (for lack of a better name). */
722 struct dwo_sections sections
{};
724 /* The CUs in the file.
725 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
726 an extension to handle LLVM's Link Time Optimization output (where
727 multiple source files may be compiled into a single object/dwo pair). */
730 /* Table of TUs in the file.
731 Each element is a struct dwo_unit. */
735 /* These sections are what may appear in a DWP file. */
739 /* These are used by both DWP version 1 and 2. */
740 struct dwarf2_section_info str
;
741 struct dwarf2_section_info cu_index
;
742 struct dwarf2_section_info tu_index
;
744 /* These are only used by DWP version 2 files.
745 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
746 sections are referenced by section number, and are not recorded here.
747 In DWP version 2 there is at most one copy of all these sections, each
748 section being (effectively) comprised of the concatenation of all of the
749 individual sections that exist in the version 1 format.
750 To keep the code simple we treat each of these concatenated pieces as a
751 section itself (a virtual section?). */
752 struct dwarf2_section_info abbrev
;
753 struct dwarf2_section_info info
;
754 struct dwarf2_section_info line
;
755 struct dwarf2_section_info loc
;
756 struct dwarf2_section_info macinfo
;
757 struct dwarf2_section_info macro
;
758 struct dwarf2_section_info str_offsets
;
759 struct dwarf2_section_info types
;
762 /* These sections are what may appear in a virtual DWO file in DWP version 1.
763 A virtual DWO file is a DWO file as it appears in a DWP file. */
765 struct virtual_v1_dwo_sections
767 struct dwarf2_section_info abbrev
;
768 struct dwarf2_section_info line
;
769 struct dwarf2_section_info loc
;
770 struct dwarf2_section_info macinfo
;
771 struct dwarf2_section_info macro
;
772 struct dwarf2_section_info str_offsets
;
773 /* Each DWP hash table entry records one CU or one TU.
774 That is recorded here, and copied to dwo_unit.section. */
775 struct dwarf2_section_info info_or_types
;
778 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
779 In version 2, the sections of the DWO files are concatenated together
780 and stored in one section of that name. Thus each ELF section contains
781 several "virtual" sections. */
783 struct virtual_v2_dwo_sections
785 bfd_size_type abbrev_offset
;
786 bfd_size_type abbrev_size
;
788 bfd_size_type line_offset
;
789 bfd_size_type line_size
;
791 bfd_size_type loc_offset
;
792 bfd_size_type loc_size
;
794 bfd_size_type macinfo_offset
;
795 bfd_size_type macinfo_size
;
797 bfd_size_type macro_offset
;
798 bfd_size_type macro_size
;
800 bfd_size_type str_offsets_offset
;
801 bfd_size_type str_offsets_size
;
803 /* Each DWP hash table entry records one CU or one TU.
804 That is recorded here, and copied to dwo_unit.section. */
805 bfd_size_type info_or_types_offset
;
806 bfd_size_type info_or_types_size
;
809 /* Contents of DWP hash tables. */
811 struct dwp_hash_table
813 uint32_t version
, nr_columns
;
814 uint32_t nr_units
, nr_slots
;
815 const gdb_byte
*hash_table
, *unit_table
;
820 const gdb_byte
*indices
;
824 /* This is indexed by column number and gives the id of the section
826 #define MAX_NR_V2_DWO_SECTIONS \
827 (1 /* .debug_info or .debug_types */ \
828 + 1 /* .debug_abbrev */ \
829 + 1 /* .debug_line */ \
830 + 1 /* .debug_loc */ \
831 + 1 /* .debug_str_offsets */ \
832 + 1 /* .debug_macro or .debug_macinfo */)
833 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
834 const gdb_byte
*offsets
;
835 const gdb_byte
*sizes
;
840 /* Data for one DWP file. */
844 dwp_file (const char *name_
, gdb_bfd_ref_ptr
&&abfd
)
846 dbfd (std::move (abfd
))
850 /* Name of the file. */
853 /* File format version. */
857 gdb_bfd_ref_ptr dbfd
;
859 /* Section info for this file. */
860 struct dwp_sections sections
{};
862 /* Table of CUs in the file. */
863 const struct dwp_hash_table
*cus
= nullptr;
865 /* Table of TUs in the file. */
866 const struct dwp_hash_table
*tus
= nullptr;
868 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
872 /* Table to map ELF section numbers to their sections.
873 This is only needed for the DWP V1 file format. */
874 unsigned int num_sections
= 0;
875 asection
**elf_sections
= nullptr;
878 /* Struct used to pass misc. parameters to read_die_and_children, et
879 al. which are used for both .debug_info and .debug_types dies.
880 All parameters here are unchanging for the life of the call. This
881 struct exists to abstract away the constant parameters of die reading. */
883 struct die_reader_specs
885 /* The bfd of die_section. */
888 /* The CU of the DIE we are parsing. */
889 struct dwarf2_cu
*cu
;
891 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
892 struct dwo_file
*dwo_file
;
894 /* The section the die comes from.
895 This is either .debug_info or .debug_types, or the .dwo variants. */
896 struct dwarf2_section_info
*die_section
;
898 /* die_section->buffer. */
899 const gdb_byte
*buffer
;
901 /* The end of the buffer. */
902 const gdb_byte
*buffer_end
;
904 /* The abbreviation table to use when reading the DIEs. */
905 struct abbrev_table
*abbrev_table
;
908 /* A subclass of die_reader_specs that holds storage and has complex
909 constructor and destructor behavior. */
911 class cutu_reader
: public die_reader_specs
915 cutu_reader (dwarf2_per_cu_data
*this_cu
,
916 dwarf2_per_objfile
*per_objfile
,
917 struct abbrev_table
*abbrev_table
,
921 explicit cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
922 dwarf2_per_objfile
*per_objfile
,
923 struct dwarf2_cu
*parent_cu
= nullptr,
924 struct dwo_file
*dwo_file
= nullptr);
926 DISABLE_COPY_AND_ASSIGN (cutu_reader
);
928 const gdb_byte
*info_ptr
= nullptr;
929 struct die_info
*comp_unit_die
= nullptr;
930 bool dummy_p
= false;
932 /* Release the new CU, putting it on the chain. This cannot be done
937 void init_tu_and_read_dwo_dies (dwarf2_per_cu_data
*this_cu
,
938 dwarf2_per_objfile
*per_objfile
,
939 int use_existing_cu
);
941 struct dwarf2_per_cu_data
*m_this_cu
;
942 std::unique_ptr
<dwarf2_cu
> m_new_cu
;
944 /* The ordinary abbreviation table. */
945 abbrev_table_up m_abbrev_table_holder
;
947 /* The DWO abbreviation table. */
948 abbrev_table_up m_dwo_abbrev_table
;
951 /* When we construct a partial symbol table entry we only
952 need this much information. */
953 struct partial_die_info
: public allocate_on_obstack
955 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
957 /* Disable assign but still keep copy ctor, which is needed
958 load_partial_dies. */
959 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
961 /* Adjust the partial die before generating a symbol for it. This
962 function may set the is_external flag or change the DIE's
964 void fixup (struct dwarf2_cu
*cu
);
966 /* Read a minimal amount of information into the minimal die
968 const gdb_byte
*read (const struct die_reader_specs
*reader
,
969 const struct abbrev_info
&abbrev
,
970 const gdb_byte
*info_ptr
);
972 /* Offset of this DIE. */
973 const sect_offset sect_off
;
975 /* DWARF-2 tag for this DIE. */
976 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
978 /* Assorted flags describing the data found in this DIE. */
979 const unsigned int has_children
: 1;
981 unsigned int is_external
: 1;
982 unsigned int is_declaration
: 1;
983 unsigned int has_type
: 1;
984 unsigned int has_specification
: 1;
985 unsigned int has_pc_info
: 1;
986 unsigned int may_be_inlined
: 1;
988 /* This DIE has been marked DW_AT_main_subprogram. */
989 unsigned int main_subprogram
: 1;
991 /* Flag set if the SCOPE field of this structure has been
993 unsigned int scope_set
: 1;
995 /* Flag set if the DIE has a byte_size attribute. */
996 unsigned int has_byte_size
: 1;
998 /* Flag set if the DIE has a DW_AT_const_value attribute. */
999 unsigned int has_const_value
: 1;
1001 /* Flag set if any of the DIE's children are template arguments. */
1002 unsigned int has_template_arguments
: 1;
1004 /* Flag set if fixup has been called on this die. */
1005 unsigned int fixup_called
: 1;
1007 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1008 unsigned int is_dwz
: 1;
1010 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1011 unsigned int spec_is_dwz
: 1;
1013 /* The name of this DIE. Normally the value of DW_AT_name, but
1014 sometimes a default name for unnamed DIEs. */
1015 const char *name
= nullptr;
1017 /* The linkage name, if present. */
1018 const char *linkage_name
= nullptr;
1020 /* The scope to prepend to our children. This is generally
1021 allocated on the comp_unit_obstack, so will disappear
1022 when this compilation unit leaves the cache. */
1023 const char *scope
= nullptr;
1025 /* Some data associated with the partial DIE. The tag determines
1026 which field is live. */
1029 /* The location description associated with this DIE, if any. */
1030 struct dwarf_block
*locdesc
;
1031 /* The offset of an import, for DW_TAG_imported_unit. */
1032 sect_offset sect_off
;
1035 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1036 CORE_ADDR lowpc
= 0;
1037 CORE_ADDR highpc
= 0;
1039 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1040 DW_AT_sibling, if any. */
1041 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1042 could return DW_AT_sibling values to its caller load_partial_dies. */
1043 const gdb_byte
*sibling
= nullptr;
1045 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1046 DW_AT_specification (or DW_AT_abstract_origin or
1047 DW_AT_extension). */
1048 sect_offset spec_offset
{};
1050 /* Pointers to this DIE's parent, first child, and next sibling,
1052 struct partial_die_info
*die_parent
= nullptr;
1053 struct partial_die_info
*die_child
= nullptr;
1054 struct partial_die_info
*die_sibling
= nullptr;
1056 friend struct partial_die_info
*
1057 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1060 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1061 partial_die_info (sect_offset sect_off
)
1062 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1066 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1068 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1073 has_specification
= 0;
1076 main_subprogram
= 0;
1079 has_const_value
= 0;
1080 has_template_arguments
= 0;
1087 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1088 but this would require a corresponding change in unpack_field_as_long
1090 static int bits_per_byte
= 8;
1092 struct variant_part_builder
;
1094 /* When reading a variant, we track a bit more information about the
1095 field, and store it in an object of this type. */
1097 struct variant_field
1099 int first_field
= -1;
1100 int last_field
= -1;
1102 /* A variant can contain other variant parts. */
1103 std::vector
<variant_part_builder
> variant_parts
;
1105 /* If we see a DW_TAG_variant, then this will be set if this is the
1107 bool default_branch
= false;
1108 /* If we see a DW_AT_discr_value, then this will be the discriminant
1110 ULONGEST discriminant_value
= 0;
1111 /* If we see a DW_AT_discr_list, then this is a pointer to the list
1113 struct dwarf_block
*discr_list_data
= nullptr;
1116 /* This represents a DW_TAG_variant_part. */
1118 struct variant_part_builder
1120 /* The offset of the discriminant field. */
1121 sect_offset discriminant_offset
{};
1123 /* Variants that are direct children of this variant part. */
1124 std::vector
<variant_field
> variants
;
1126 /* True if we're currently reading a variant. */
1127 bool processing_variant
= false;
1132 int accessibility
= 0;
1134 /* Variant parts need to find the discriminant, which is a DIE
1135 reference. We track the section offset of each field to make
1138 struct field field
{};
1143 const char *name
= nullptr;
1144 std::vector
<struct fn_field
> fnfields
;
1147 /* The routines that read and process dies for a C struct or C++ class
1148 pass lists of data member fields and lists of member function fields
1149 in an instance of a field_info structure, as defined below. */
1152 /* List of data member and baseclasses fields. */
1153 std::vector
<struct nextfield
> fields
;
1154 std::vector
<struct nextfield
> baseclasses
;
1156 /* Set if the accessibility of one of the fields is not public. */
1157 int non_public_fields
= 0;
1159 /* Member function fieldlist array, contains name of possibly overloaded
1160 member function, number of overloaded member functions and a pointer
1161 to the head of the member function field chain. */
1162 std::vector
<struct fnfieldlist
> fnfieldlists
;
1164 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1165 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1166 std::vector
<struct decl_field
> typedef_field_list
;
1168 /* Nested types defined by this class and the number of elements in this
1170 std::vector
<struct decl_field
> nested_types_list
;
1172 /* If non-null, this is the variant part we are currently
1174 variant_part_builder
*current_variant_part
= nullptr;
1175 /* This holds all the top-level variant parts attached to the type
1177 std::vector
<variant_part_builder
> variant_parts
;
1179 /* Return the total number of fields (including baseclasses). */
1180 int nfields () const
1182 return fields
.size () + baseclasses
.size ();
1186 /* Loaded secondary compilation units are kept in memory until they
1187 have not been referenced for the processing of this many
1188 compilation units. Set this to zero to disable caching. Cache
1189 sizes of up to at least twenty will improve startup time for
1190 typical inter-CU-reference binaries, at an obvious memory cost. */
1191 static int dwarf_max_cache_age
= 5;
1193 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1194 struct cmd_list_element
*c
, const char *value
)
1196 fprintf_filtered (file
, _("The upper bound on the age of cached "
1197 "DWARF compilation units is %s.\n"),
1201 /* local function prototypes */
1203 static void dwarf2_find_base_address (struct die_info
*die
,
1204 struct dwarf2_cu
*cu
);
1206 static dwarf2_psymtab
*create_partial_symtab
1207 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1209 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1210 const gdb_byte
*info_ptr
,
1211 struct die_info
*type_unit_die
);
1213 static void dwarf2_build_psymtabs_hard
1214 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1216 static void scan_partial_symbols (struct partial_die_info
*,
1217 CORE_ADDR
*, CORE_ADDR
*,
1218 int, struct dwarf2_cu
*);
1220 static void add_partial_symbol (struct partial_die_info
*,
1221 struct dwarf2_cu
*);
1223 static void add_partial_namespace (struct partial_die_info
*pdi
,
1224 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1225 int set_addrmap
, struct dwarf2_cu
*cu
);
1227 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1228 CORE_ADDR
*highpc
, int set_addrmap
,
1229 struct dwarf2_cu
*cu
);
1231 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1232 struct dwarf2_cu
*cu
);
1234 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1235 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1236 int need_pc
, struct dwarf2_cu
*cu
);
1238 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1240 static struct partial_die_info
*load_partial_dies
1241 (const struct die_reader_specs
*, const gdb_byte
*, int);
1243 /* A pair of partial_die_info and compilation unit. */
1244 struct cu_partial_die_info
1246 /* The compilation unit of the partial_die_info. */
1247 struct dwarf2_cu
*cu
;
1248 /* A partial_die_info. */
1249 struct partial_die_info
*pdi
;
1251 cu_partial_die_info (struct dwarf2_cu
*cu
, struct partial_die_info
*pdi
)
1257 cu_partial_die_info () = delete;
1260 static const struct cu_partial_die_info
find_partial_die (sect_offset
, int,
1261 struct dwarf2_cu
*);
1263 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1264 struct attribute
*, struct attr_abbrev
*,
1265 const gdb_byte
*, bool *need_reprocess
);
1267 static void read_attribute_reprocess (const struct die_reader_specs
*reader
,
1268 struct attribute
*attr
);
1270 static CORE_ADDR
read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
);
1272 static sect_offset read_abbrev_offset
1273 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1274 struct dwarf2_section_info
*, sect_offset
);
1276 static const char *read_indirect_string
1277 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1278 const struct comp_unit_head
*, unsigned int *);
1280 static const char *read_indirect_string_at_offset
1281 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, LONGEST str_offset
);
1283 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1287 static const char *read_dwo_str_index (const struct die_reader_specs
*reader
,
1288 ULONGEST str_index
);
1290 static const char *read_stub_str_index (struct dwarf2_cu
*cu
,
1291 ULONGEST str_index
);
1293 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1295 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1296 struct dwarf2_cu
*);
1298 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1299 struct dwarf2_cu
*cu
);
1301 static const char *dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
);
1303 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1304 struct dwarf2_cu
*cu
);
1306 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1308 static struct die_info
*die_specification (struct die_info
*die
,
1309 struct dwarf2_cu
**);
1311 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1312 struct dwarf2_cu
*cu
);
1314 static void dwarf_decode_lines (struct line_header
*, const char *,
1315 struct dwarf2_cu
*, dwarf2_psymtab
*,
1316 CORE_ADDR
, int decode_mapping
);
1318 static void dwarf2_start_subfile (struct dwarf2_cu
*, const char *,
1321 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1322 struct dwarf2_cu
*, struct symbol
* = NULL
);
1324 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1325 struct dwarf2_cu
*);
1327 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1330 struct obstack
*obstack
,
1331 struct dwarf2_cu
*cu
, LONGEST
*value
,
1332 const gdb_byte
**bytes
,
1333 struct dwarf2_locexpr_baton
**baton
);
1335 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1337 static int need_gnat_info (struct dwarf2_cu
*);
1339 static struct type
*die_descriptive_type (struct die_info
*,
1340 struct dwarf2_cu
*);
1342 static void set_descriptive_type (struct type
*, struct die_info
*,
1343 struct dwarf2_cu
*);
1345 static struct type
*die_containing_type (struct die_info
*,
1346 struct dwarf2_cu
*);
1348 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1349 struct dwarf2_cu
*);
1351 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1353 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1355 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1357 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1358 const char *suffix
, int physname
,
1359 struct dwarf2_cu
*cu
);
1361 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1363 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1365 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1367 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1369 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1371 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1373 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1374 struct dwarf2_cu
*, dwarf2_psymtab
*);
1376 /* Return the .debug_loclists section to use for cu. */
1377 static struct dwarf2_section_info
*cu_debug_loc_section (struct dwarf2_cu
*cu
);
1379 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1380 values. Keep the items ordered with increasing constraints compliance. */
1383 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1384 PC_BOUNDS_NOT_PRESENT
,
1386 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1387 were present but they do not form a valid range of PC addresses. */
1390 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1393 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1397 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1398 CORE_ADDR
*, CORE_ADDR
*,
1402 static void get_scope_pc_bounds (struct die_info
*,
1403 CORE_ADDR
*, CORE_ADDR
*,
1404 struct dwarf2_cu
*);
1406 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1407 CORE_ADDR
, struct dwarf2_cu
*);
1409 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1410 struct dwarf2_cu
*);
1412 static void dwarf2_attach_fields_to_type (struct field_info
*,
1413 struct type
*, struct dwarf2_cu
*);
1415 static void dwarf2_add_member_fn (struct field_info
*,
1416 struct die_info
*, struct type
*,
1417 struct dwarf2_cu
*);
1419 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1421 struct dwarf2_cu
*);
1423 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1425 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1427 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1429 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1431 static struct using_direct
**using_directives (struct dwarf2_cu
*cu
);
1433 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1435 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1437 static struct type
*read_module_type (struct die_info
*die
,
1438 struct dwarf2_cu
*cu
);
1440 static const char *namespace_name (struct die_info
*die
,
1441 int *is_anonymous
, struct dwarf2_cu
*);
1443 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1445 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*,
1448 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1449 struct dwarf2_cu
*);
1451 static struct die_info
*read_die_and_siblings_1
1452 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1455 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1456 const gdb_byte
*info_ptr
,
1457 const gdb_byte
**new_info_ptr
,
1458 struct die_info
*parent
);
1460 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1461 struct die_info
**, const gdb_byte
*,
1464 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1465 struct die_info
**, const gdb_byte
*);
1467 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1469 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1472 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1474 static const char *dwarf2_full_name (const char *name
,
1475 struct die_info
*die
,
1476 struct dwarf2_cu
*cu
);
1478 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1479 struct dwarf2_cu
*cu
);
1481 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1482 struct dwarf2_cu
**);
1484 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1486 static void dump_die_for_error (struct die_info
*);
1488 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1491 /*static*/ void dump_die (struct die_info
*, int max_level
);
1493 static void store_in_ref_table (struct die_info
*,
1494 struct dwarf2_cu
*);
1496 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1497 const struct attribute
*,
1498 struct dwarf2_cu
**);
1500 static struct die_info
*follow_die_ref (struct die_info
*,
1501 const struct attribute
*,
1502 struct dwarf2_cu
**);
1504 static struct die_info
*follow_die_sig (struct die_info
*,
1505 const struct attribute
*,
1506 struct dwarf2_cu
**);
1508 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1509 struct dwarf2_cu
*);
1511 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1512 const struct attribute
*,
1513 struct dwarf2_cu
*);
1515 static void load_full_type_unit (dwarf2_per_cu_data
*per_cu
,
1516 dwarf2_per_objfile
*per_objfile
);
1518 static void read_signatured_type (signatured_type
*sig_type
,
1519 dwarf2_per_objfile
*per_objfile
);
1521 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1522 struct die_info
*die
, struct dwarf2_cu
*cu
,
1523 struct dynamic_prop
*prop
, struct type
*type
);
1525 /* memory allocation interface */
1527 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1529 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1531 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1533 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1534 struct dwarf2_loclist_baton
*baton
,
1535 const struct attribute
*attr
);
1537 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1539 struct dwarf2_cu
*cu
,
1542 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1543 const gdb_byte
*info_ptr
,
1544 struct abbrev_info
*abbrev
);
1546 static hashval_t
partial_die_hash (const void *item
);
1548 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1550 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1551 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1552 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1554 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1555 struct die_info
*comp_unit_die
,
1556 enum language pretend_language
);
1558 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1560 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1562 static struct type
*set_die_type (struct die_info
*, struct type
*,
1563 struct dwarf2_cu
*);
1565 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1567 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1569 static void load_full_comp_unit (dwarf2_per_cu_data
*per_cu
,
1570 dwarf2_per_objfile
*per_objfile
,
1572 enum language pretend_language
);
1574 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1577 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1580 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1581 struct dwarf2_per_cu_data
*);
1583 static void dwarf2_mark (struct dwarf2_cu
*);
1585 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1587 static struct type
*get_die_type_at_offset (sect_offset
,
1588 struct dwarf2_per_cu_data
*);
1590 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1592 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1593 enum language pretend_language
);
1595 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1597 /* Class, the destructor of which frees all allocated queue entries. This
1598 will only have work to do if an error was thrown while processing the
1599 dwarf. If no error was thrown then the queue entries should have all
1600 been processed, and freed, as we went along. */
1602 class dwarf2_queue_guard
1605 explicit dwarf2_queue_guard (dwarf2_per_objfile
*per_objfile
)
1606 : m_per_objfile (per_objfile
)
1610 /* Free any entries remaining on the queue. There should only be
1611 entries left if we hit an error while processing the dwarf. */
1612 ~dwarf2_queue_guard ()
1614 /* Ensure that no memory is allocated by the queue. */
1615 std::queue
<dwarf2_queue_item
> empty
;
1616 std::swap (m_per_objfile
->per_bfd
->queue
, empty
);
1619 DISABLE_COPY_AND_ASSIGN (dwarf2_queue_guard
);
1622 dwarf2_per_objfile
*m_per_objfile
;
1625 dwarf2_queue_item::~dwarf2_queue_item ()
1627 /* Anything still marked queued is likely to be in an
1628 inconsistent state, so discard it. */
1631 if (per_cu
->cu
!= NULL
)
1632 free_one_cached_comp_unit (per_cu
);
1637 /* The return type of find_file_and_directory. Note, the enclosed
1638 string pointers are only valid while this object is valid. */
1640 struct file_and_directory
1642 /* The filename. This is never NULL. */
1645 /* The compilation directory. NULL if not known. If we needed to
1646 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1647 points directly to the DW_AT_comp_dir string attribute owned by
1648 the obstack that owns the DIE. */
1649 const char *comp_dir
;
1651 /* If we needed to build a new string for comp_dir, this is what
1652 owns the storage. */
1653 std::string comp_dir_storage
;
1656 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1657 struct dwarf2_cu
*cu
);
1659 static htab_up
allocate_signatured_type_table ();
1661 static htab_up
allocate_dwo_unit_table ();
1663 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1664 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1665 struct dwp_file
*dwp_file
, const char *comp_dir
,
1666 ULONGEST signature
, int is_debug_types
);
1668 static struct dwp_file
*get_dwp_file
1669 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1671 static struct dwo_unit
*lookup_dwo_comp_unit
1672 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1674 static struct dwo_unit
*lookup_dwo_type_unit
1675 (struct signatured_type
*, const char *, const char *);
1677 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1679 /* A unique pointer to a dwo_file. */
1681 typedef std::unique_ptr
<struct dwo_file
> dwo_file_up
;
1683 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1685 static void check_producer (struct dwarf2_cu
*cu
);
1687 static void free_line_header_voidp (void *arg
);
1689 /* Various complaints about symbol reading that don't abort the process. */
1692 dwarf2_debug_line_missing_file_complaint (void)
1694 complaint (_(".debug_line section has line data without a file"));
1698 dwarf2_debug_line_missing_end_sequence_complaint (void)
1700 complaint (_(".debug_line section has line "
1701 "program sequence without an end"));
1705 dwarf2_complex_location_expr_complaint (void)
1707 complaint (_("location expression too complex"));
1711 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1714 complaint (_("const value length mismatch for '%s', got %d, expected %d"),
1719 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1721 complaint (_("invalid attribute class or form for '%s' in '%s'"),
1725 /* Hash function for line_header_hash. */
1728 line_header_hash (const struct line_header
*ofs
)
1730 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
1733 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1736 line_header_hash_voidp (const void *item
)
1738 const struct line_header
*ofs
= (const struct line_header
*) item
;
1740 return line_header_hash (ofs
);
1743 /* Equality function for line_header_hash. */
1746 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1748 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
1749 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
1751 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
1752 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
1757 /* See declaration. */
1759 dwarf2_per_bfd::dwarf2_per_bfd (bfd
*obfd
, const dwarf2_debug_sections
*names
,
1762 can_copy (can_copy_
)
1765 names
= &dwarf2_elf_names
;
1767 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
1768 locate_sections (obfd
, sec
, *names
);
1771 dwarf2_per_bfd::~dwarf2_per_bfd ()
1773 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
1774 free_cached_comp_units ();
1776 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
1777 per_cu
->imported_symtabs_free ();
1779 for (signatured_type
*sig_type
: all_type_units
)
1780 sig_type
->per_cu
.imported_symtabs_free ();
1782 /* Everything else should be on this->obstack. */
1785 /* See declaration. */
1788 dwarf2_per_bfd::free_cached_comp_units ()
1790 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
1791 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
1792 while (per_cu
!= NULL
)
1794 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
1797 *last_chain
= next_cu
;
1802 /* A helper class that calls free_cached_comp_units on
1805 class free_cached_comp_units
1809 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
1810 : m_per_objfile (per_objfile
)
1814 ~free_cached_comp_units ()
1816 m_per_objfile
->per_bfd
->free_cached_comp_units ();
1819 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
1823 dwarf2_per_objfile
*m_per_objfile
;
1829 dwarf2_per_objfile::symtab_set_p (const dwarf2_per_cu_data
*per_cu
) const
1831 gdb_assert (per_cu
->index
< this->m_symtabs
.size ());
1833 return this->m_symtabs
[per_cu
->index
] != nullptr;
1839 dwarf2_per_objfile::get_symtab (const dwarf2_per_cu_data
*per_cu
) const
1841 gdb_assert (per_cu
->index
< this->m_symtabs
.size ());
1843 return this->m_symtabs
[per_cu
->index
];
1849 dwarf2_per_objfile::set_symtab (const dwarf2_per_cu_data
*per_cu
,
1850 compunit_symtab
*symtab
)
1852 gdb_assert (per_cu
->index
< this->m_symtabs
.size ());
1853 gdb_assert (this->m_symtabs
[per_cu
->index
] == nullptr);
1855 this->m_symtabs
[per_cu
->index
] = symtab
;
1858 /* Try to locate the sections we need for DWARF 2 debugging
1859 information and return true if we have enough to do something.
1860 NAMES points to the dwarf2 section names, or is NULL if the standard
1861 ELF names are used. CAN_COPY is true for formats where symbol
1862 interposition is possible and so symbol values must follow copy
1863 relocation rules. */
1866 dwarf2_has_info (struct objfile
*objfile
,
1867 const struct dwarf2_debug_sections
*names
,
1870 if (objfile
->flags
& OBJF_READNEVER
)
1873 struct dwarf2_per_objfile
*dwarf2_per_objfile
1874 = get_dwarf2_per_objfile (objfile
);
1876 if (dwarf2_per_objfile
== NULL
)
1878 /* For now, each dwarf2_per_objfile owns its own dwarf2_per_bfd (no
1880 dwarf2_per_bfd
*per_bfd
= new dwarf2_per_bfd (objfile
->obfd
, names
, can_copy
);
1882 dwarf2_per_objfile
= dwarf2_objfile_data_key
.emplace (objfile
, objfile
, per_bfd
);
1885 return (!dwarf2_per_objfile
->per_bfd
->info
.is_virtual
1886 && dwarf2_per_objfile
->per_bfd
->info
.s
.section
!= NULL
1887 && !dwarf2_per_objfile
->per_bfd
->abbrev
.is_virtual
1888 && dwarf2_per_objfile
->per_bfd
->abbrev
.s
.section
!= NULL
);
1891 /* When loading sections, we look either for uncompressed section or for
1892 compressed section names. */
1895 section_is_p (const char *section_name
,
1896 const struct dwarf2_section_names
*names
)
1898 if (names
->normal
!= NULL
1899 && strcmp (section_name
, names
->normal
) == 0)
1901 if (names
->compressed
!= NULL
1902 && strcmp (section_name
, names
->compressed
) == 0)
1907 /* See declaration. */
1910 dwarf2_per_bfd::locate_sections (bfd
*abfd
, asection
*sectp
,
1911 const dwarf2_debug_sections
&names
)
1913 flagword aflag
= bfd_section_flags (sectp
);
1915 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
1918 else if (elf_section_data (sectp
)->this_hdr
.sh_size
1919 > bfd_get_file_size (abfd
))
1921 bfd_size_type size
= elf_section_data (sectp
)->this_hdr
.sh_size
;
1922 warning (_("Discarding section %s which has a section size (%s"
1923 ") larger than the file size [in module %s]"),
1924 bfd_section_name (sectp
), phex_nz (size
, sizeof (size
)),
1925 bfd_get_filename (abfd
));
1927 else if (section_is_p (sectp
->name
, &names
.info
))
1929 this->info
.s
.section
= sectp
;
1930 this->info
.size
= bfd_section_size (sectp
);
1932 else if (section_is_p (sectp
->name
, &names
.abbrev
))
1934 this->abbrev
.s
.section
= sectp
;
1935 this->abbrev
.size
= bfd_section_size (sectp
);
1937 else if (section_is_p (sectp
->name
, &names
.line
))
1939 this->line
.s
.section
= sectp
;
1940 this->line
.size
= bfd_section_size (sectp
);
1942 else if (section_is_p (sectp
->name
, &names
.loc
))
1944 this->loc
.s
.section
= sectp
;
1945 this->loc
.size
= bfd_section_size (sectp
);
1947 else if (section_is_p (sectp
->name
, &names
.loclists
))
1949 this->loclists
.s
.section
= sectp
;
1950 this->loclists
.size
= bfd_section_size (sectp
);
1952 else if (section_is_p (sectp
->name
, &names
.macinfo
))
1954 this->macinfo
.s
.section
= sectp
;
1955 this->macinfo
.size
= bfd_section_size (sectp
);
1957 else if (section_is_p (sectp
->name
, &names
.macro
))
1959 this->macro
.s
.section
= sectp
;
1960 this->macro
.size
= bfd_section_size (sectp
);
1962 else if (section_is_p (sectp
->name
, &names
.str
))
1964 this->str
.s
.section
= sectp
;
1965 this->str
.size
= bfd_section_size (sectp
);
1967 else if (section_is_p (sectp
->name
, &names
.str_offsets
))
1969 this->str_offsets
.s
.section
= sectp
;
1970 this->str_offsets
.size
= bfd_section_size (sectp
);
1972 else if (section_is_p (sectp
->name
, &names
.line_str
))
1974 this->line_str
.s
.section
= sectp
;
1975 this->line_str
.size
= bfd_section_size (sectp
);
1977 else if (section_is_p (sectp
->name
, &names
.addr
))
1979 this->addr
.s
.section
= sectp
;
1980 this->addr
.size
= bfd_section_size (sectp
);
1982 else if (section_is_p (sectp
->name
, &names
.frame
))
1984 this->frame
.s
.section
= sectp
;
1985 this->frame
.size
= bfd_section_size (sectp
);
1987 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
1989 this->eh_frame
.s
.section
= sectp
;
1990 this->eh_frame
.size
= bfd_section_size (sectp
);
1992 else if (section_is_p (sectp
->name
, &names
.ranges
))
1994 this->ranges
.s
.section
= sectp
;
1995 this->ranges
.size
= bfd_section_size (sectp
);
1997 else if (section_is_p (sectp
->name
, &names
.rnglists
))
1999 this->rnglists
.s
.section
= sectp
;
2000 this->rnglists
.size
= bfd_section_size (sectp
);
2002 else if (section_is_p (sectp
->name
, &names
.types
))
2004 struct dwarf2_section_info type_section
;
2006 memset (&type_section
, 0, sizeof (type_section
));
2007 type_section
.s
.section
= sectp
;
2008 type_section
.size
= bfd_section_size (sectp
);
2010 this->types
.push_back (type_section
);
2012 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2014 this->gdb_index
.s
.section
= sectp
;
2015 this->gdb_index
.size
= bfd_section_size (sectp
);
2017 else if (section_is_p (sectp
->name
, &names
.debug_names
))
2019 this->debug_names
.s
.section
= sectp
;
2020 this->debug_names
.size
= bfd_section_size (sectp
);
2022 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
2024 this->debug_aranges
.s
.section
= sectp
;
2025 this->debug_aranges
.size
= bfd_section_size (sectp
);
2028 if ((bfd_section_flags (sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2029 && bfd_section_vma (sectp
) == 0)
2030 this->has_section_at_zero
= true;
2033 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2037 dwarf2_get_section_info (struct objfile
*objfile
,
2038 enum dwarf2_section_enum sect
,
2039 asection
**sectp
, const gdb_byte
**bufp
,
2040 bfd_size_type
*sizep
)
2042 struct dwarf2_per_objfile
*data
= dwarf2_objfile_data_key
.get (objfile
);
2043 struct dwarf2_section_info
*info
;
2045 /* We may see an objfile without any DWARF, in which case we just
2056 case DWARF2_DEBUG_FRAME
:
2057 info
= &data
->per_bfd
->frame
;
2059 case DWARF2_EH_FRAME
:
2060 info
= &data
->per_bfd
->eh_frame
;
2063 gdb_assert_not_reached ("unexpected section");
2066 info
->read (objfile
);
2068 *sectp
= info
->get_bfd_section ();
2069 *bufp
= info
->buffer
;
2070 *sizep
= info
->size
;
2073 /* A helper function to find the sections for a .dwz file. */
2076 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2078 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2080 /* Note that we only support the standard ELF names, because .dwz
2081 is ELF-only (at the time of writing). */
2082 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2084 dwz_file
->abbrev
.s
.section
= sectp
;
2085 dwz_file
->abbrev
.size
= bfd_section_size (sectp
);
2087 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2089 dwz_file
->info
.s
.section
= sectp
;
2090 dwz_file
->info
.size
= bfd_section_size (sectp
);
2092 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2094 dwz_file
->str
.s
.section
= sectp
;
2095 dwz_file
->str
.size
= bfd_section_size (sectp
);
2097 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2099 dwz_file
->line
.s
.section
= sectp
;
2100 dwz_file
->line
.size
= bfd_section_size (sectp
);
2102 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2104 dwz_file
->macro
.s
.section
= sectp
;
2105 dwz_file
->macro
.size
= bfd_section_size (sectp
);
2107 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2109 dwz_file
->gdb_index
.s
.section
= sectp
;
2110 dwz_file
->gdb_index
.size
= bfd_section_size (sectp
);
2112 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2114 dwz_file
->debug_names
.s
.section
= sectp
;
2115 dwz_file
->debug_names
.size
= bfd_section_size (sectp
);
2119 /* See dwarf2read.h. */
2122 dwarf2_get_dwz_file (dwarf2_per_bfd
*per_bfd
)
2124 const char *filename
;
2125 bfd_size_type buildid_len_arg
;
2129 if (per_bfd
->dwz_file
!= NULL
)
2130 return per_bfd
->dwz_file
.get ();
2132 bfd_set_error (bfd_error_no_error
);
2133 gdb::unique_xmalloc_ptr
<char> data
2134 (bfd_get_alt_debug_link_info (per_bfd
->obfd
,
2135 &buildid_len_arg
, &buildid
));
2138 if (bfd_get_error () == bfd_error_no_error
)
2140 error (_("could not read '.gnu_debugaltlink' section: %s"),
2141 bfd_errmsg (bfd_get_error ()));
2144 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2146 buildid_len
= (size_t) buildid_len_arg
;
2148 filename
= data
.get ();
2150 std::string abs_storage
;
2151 if (!IS_ABSOLUTE_PATH (filename
))
2153 gdb::unique_xmalloc_ptr
<char> abs
2154 = gdb_realpath (bfd_get_filename (per_bfd
->obfd
));
2156 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2157 filename
= abs_storage
.c_str ();
2160 /* First try the file name given in the section. If that doesn't
2161 work, try to use the build-id instead. */
2162 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
));
2163 if (dwz_bfd
!= NULL
)
2165 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2166 dwz_bfd
.reset (nullptr);
2169 if (dwz_bfd
== NULL
)
2170 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2172 if (dwz_bfd
== nullptr)
2174 gdb::unique_xmalloc_ptr
<char> alt_filename
;
2175 const char *origname
= bfd_get_filename (per_bfd
->obfd
);
2177 scoped_fd
fd (debuginfod_debuginfo_query (buildid
,
2184 /* File successfully retrieved from server. */
2185 dwz_bfd
= gdb_bfd_open (alt_filename
.get (), gnutarget
);
2187 if (dwz_bfd
== nullptr)
2188 warning (_("File \"%s\" from debuginfod cannot be opened as bfd"),
2189 alt_filename
.get ());
2190 else if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2191 dwz_bfd
.reset (nullptr);
2195 if (dwz_bfd
== NULL
)
2196 error (_("could not find '.gnu_debugaltlink' file for %s"),
2197 bfd_get_filename (per_bfd
->obfd
));
2199 std::unique_ptr
<struct dwz_file
> result
2200 (new struct dwz_file (std::move (dwz_bfd
)));
2202 bfd_map_over_sections (result
->dwz_bfd
.get (), locate_dwz_sections
,
2205 gdb_bfd_record_inclusion (per_bfd
->obfd
, result
->dwz_bfd
.get ());
2206 per_bfd
->dwz_file
= std::move (result
);
2207 return per_bfd
->dwz_file
.get ();
2210 /* DWARF quick_symbols_functions support. */
2212 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2213 unique line tables, so we maintain a separate table of all .debug_line
2214 derived entries to support the sharing.
2215 All the quick functions need is the list of file names. We discard the
2216 line_header when we're done and don't need to record it here. */
2217 struct quick_file_names
2219 /* The data used to construct the hash key. */
2220 struct stmt_list_hash hash
;
2222 /* The number of entries in file_names, real_names. */
2223 unsigned int num_file_names
;
2225 /* The file names from the line table, after being run through
2227 const char **file_names
;
2229 /* The file names from the line table after being run through
2230 gdb_realpath. These are computed lazily. */
2231 const char **real_names
;
2234 /* When using the index (and thus not using psymtabs), each CU has an
2235 object of this type. This is used to hold information needed by
2236 the various "quick" methods. */
2237 struct dwarf2_per_cu_quick_data
2239 /* The file table. This can be NULL if there was no file table
2240 or it's currently not read in.
2241 NOTE: This points into dwarf2_per_objfile->per_bfd->quick_file_names_table. */
2242 struct quick_file_names
*file_names
;
2244 /* A temporary mark bit used when iterating over all CUs in
2245 expand_symtabs_matching. */
2246 unsigned int mark
: 1;
2248 /* True if we've tried to read the file table and found there isn't one.
2249 There will be no point in trying to read it again next time. */
2250 unsigned int no_file_data
: 1;
2253 /* Utility hash function for a stmt_list_hash. */
2256 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2260 if (stmt_list_hash
->dwo_unit
!= NULL
)
2261 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2262 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2266 /* Utility equality function for a stmt_list_hash. */
2269 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2270 const struct stmt_list_hash
*rhs
)
2272 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2274 if (lhs
->dwo_unit
!= NULL
2275 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2278 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2281 /* Hash function for a quick_file_names. */
2284 hash_file_name_entry (const void *e
)
2286 const struct quick_file_names
*file_data
2287 = (const struct quick_file_names
*) e
;
2289 return hash_stmt_list_entry (&file_data
->hash
);
2292 /* Equality function for a quick_file_names. */
2295 eq_file_name_entry (const void *a
, const void *b
)
2297 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2298 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2300 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2303 /* Delete function for a quick_file_names. */
2306 delete_file_name_entry (void *e
)
2308 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2311 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2313 xfree ((void*) file_data
->file_names
[i
]);
2314 if (file_data
->real_names
)
2315 xfree ((void*) file_data
->real_names
[i
]);
2318 /* The space for the struct itself lives on the obstack, so we don't
2322 /* Create a quick_file_names hash table. */
2325 create_quick_file_names_table (unsigned int nr_initial_entries
)
2327 return htab_up (htab_create_alloc (nr_initial_entries
,
2328 hash_file_name_entry
, eq_file_name_entry
,
2329 delete_file_name_entry
, xcalloc
, xfree
));
2332 /* Read in CU (dwarf2_cu object) for PER_CU in the context of PER_OBJFILE. This
2333 function is unrelated to symtabs, symtab would have to be created afterwards.
2334 You should call age_cached_comp_units after processing the CU. */
2337 load_cu (dwarf2_per_cu_data
*per_cu
, dwarf2_per_objfile
*per_objfile
,
2340 if (per_cu
->is_debug_types
)
2341 load_full_type_unit (per_cu
, per_objfile
);
2343 load_full_comp_unit (per_cu
, per_objfile
, skip_partial
, language_minimal
);
2345 if (per_cu
->cu
== NULL
)
2346 return; /* Dummy CU. */
2348 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2351 /* Read in the symbols for PER_CU in the context of DWARF"_PER_OBJFILE. */
2354 dw2_do_instantiate_symtab (dwarf2_per_cu_data
*per_cu
,
2355 dwarf2_per_objfile
*dwarf2_per_objfile
,
2358 /* Skip type_unit_groups, reading the type units they contain
2359 is handled elsewhere. */
2360 if (per_cu
->type_unit_group_p ())
2363 /* The destructor of dwarf2_queue_guard frees any entries left on
2364 the queue. After this point we're guaranteed to leave this function
2365 with the dwarf queue empty. */
2366 dwarf2_queue_guard
q_guard (dwarf2_per_objfile
);
2368 if (!dwarf2_per_objfile
->symtab_set_p (per_cu
))
2370 queue_comp_unit (per_cu
, language_minimal
);
2371 load_cu (per_cu
, dwarf2_per_objfile
, skip_partial
);
2373 /* If we just loaded a CU from a DWO, and we're working with an index
2374 that may badly handle TUs, load all the TUs in that DWO as well.
2375 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2376 if (!per_cu
->is_debug_types
2377 && per_cu
->cu
!= NULL
2378 && per_cu
->cu
->dwo_unit
!= NULL
2379 && dwarf2_per_objfile
->per_bfd
->index_table
!= NULL
2380 && dwarf2_per_objfile
->per_bfd
->index_table
->version
<= 7
2381 /* DWP files aren't supported yet. */
2382 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2383 queue_and_load_all_dwo_tus (per_cu
);
2386 process_queue (dwarf2_per_objfile
);
2388 /* Age the cache, releasing compilation units that have not
2389 been used recently. */
2390 age_cached_comp_units (dwarf2_per_objfile
);
2393 /* Ensure that the symbols for PER_CU have been read in. DWARF2_PER_OBJFILE is
2394 the per-objfile for which this symtab is instantiated.
2396 Returns the resulting symbol table. */
2398 static struct compunit_symtab
*
2399 dw2_instantiate_symtab (dwarf2_per_cu_data
*per_cu
,
2400 dwarf2_per_objfile
*dwarf2_per_objfile
,
2403 gdb_assert (dwarf2_per_objfile
->per_bfd
->using_index
);
2405 if (!dwarf2_per_objfile
->symtab_set_p (per_cu
))
2407 free_cached_comp_units
freer (dwarf2_per_objfile
);
2408 scoped_restore decrementer
= increment_reading_symtab ();
2409 dw2_do_instantiate_symtab (per_cu
, dwarf2_per_objfile
, skip_partial
);
2410 process_cu_includes (dwarf2_per_objfile
);
2413 return dwarf2_per_objfile
->get_symtab (per_cu
);
2416 /* See declaration. */
2418 dwarf2_per_cu_data
*
2419 dwarf2_per_bfd::get_cutu (int index
)
2421 if (index
>= this->all_comp_units
.size ())
2423 index
-= this->all_comp_units
.size ();
2424 gdb_assert (index
< this->all_type_units
.size ());
2425 return &this->all_type_units
[index
]->per_cu
;
2428 return this->all_comp_units
[index
];
2431 /* See declaration. */
2433 dwarf2_per_cu_data
*
2434 dwarf2_per_bfd::get_cu (int index
)
2436 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2438 return this->all_comp_units
[index
];
2441 /* See declaration. */
2444 dwarf2_per_bfd::get_tu (int index
)
2446 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2448 return this->all_type_units
[index
];
2453 dwarf2_per_cu_data
*
2454 dwarf2_per_bfd::allocate_per_cu ()
2456 dwarf2_per_cu_data
*result
= OBSTACK_ZALLOC (&obstack
, dwarf2_per_cu_data
);
2457 result
->per_bfd
= this;
2458 result
->index
= m_num_psymtabs
++;
2465 dwarf2_per_bfd::allocate_signatured_type ()
2467 signatured_type
*result
= OBSTACK_ZALLOC (&obstack
, signatured_type
);
2468 result
->per_cu
.per_bfd
= this;
2469 result
->per_cu
.index
= m_num_psymtabs
++;
2473 /* Return a new dwarf2_per_cu_data allocated on the dwarf2_per_objfile
2474 obstack, and constructed with the specified field values. */
2476 static dwarf2_per_cu_data
*
2477 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2478 struct dwarf2_section_info
*section
,
2480 sect_offset sect_off
, ULONGEST length
)
2482 dwarf2_per_cu_data
*the_cu
= dwarf2_per_objfile
->per_bfd
->allocate_per_cu ();
2483 the_cu
->sect_off
= sect_off
;
2484 the_cu
->length
= length
;
2485 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2486 the_cu
->section
= section
;
2487 the_cu
->v
.quick
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
2488 struct dwarf2_per_cu_quick_data
);
2489 the_cu
->is_dwz
= is_dwz
;
2493 /* A helper for create_cus_from_index that handles a given list of
2497 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2498 const gdb_byte
*cu_list
, offset_type n_elements
,
2499 struct dwarf2_section_info
*section
,
2502 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2504 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2506 sect_offset sect_off
2507 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2508 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2511 dwarf2_per_cu_data
*per_cu
2512 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
2514 dwarf2_per_objfile
->per_bfd
->all_comp_units
.push_back (per_cu
);
2518 /* Read the CU list from the mapped index, and use it to create all
2519 the CU objects for this objfile. */
2522 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2523 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2524 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2526 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_comp_units
.empty ());
2527 dwarf2_per_objfile
->per_bfd
->all_comp_units
.reserve
2528 ((cu_list_elements
+ dwz_elements
) / 2);
2530 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
2531 &dwarf2_per_objfile
->per_bfd
->info
, 0);
2533 if (dwz_elements
== 0)
2536 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
->per_bfd
);
2537 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
2541 /* Create the signatured type hash table from the index. */
2544 create_signatured_type_table_from_index
2545 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2546 struct dwarf2_section_info
*section
,
2547 const gdb_byte
*bytes
,
2548 offset_type elements
)
2550 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_type_units
.empty ());
2551 dwarf2_per_objfile
->per_bfd
->all_type_units
.reserve (elements
/ 3);
2553 htab_up sig_types_hash
= allocate_signatured_type_table ();
2555 for (offset_type i
= 0; i
< elements
; i
+= 3)
2557 struct signatured_type
*sig_type
;
2560 cu_offset type_offset_in_tu
;
2562 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2563 sect_offset sect_off
2564 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2566 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
2568 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2571 sig_type
= dwarf2_per_objfile
->per_bfd
->allocate_signatured_type ();
2572 sig_type
->signature
= signature
;
2573 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
2574 sig_type
->per_cu
.is_debug_types
= 1;
2575 sig_type
->per_cu
.section
= section
;
2576 sig_type
->per_cu
.sect_off
= sect_off
;
2577 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
2578 sig_type
->per_cu
.v
.quick
2579 = OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
2580 struct dwarf2_per_cu_quick_data
);
2582 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2585 dwarf2_per_objfile
->per_bfd
->all_type_units
.push_back (sig_type
);
2588 dwarf2_per_objfile
->per_bfd
->signatured_types
= std::move (sig_types_hash
);
2591 /* Create the signatured type hash table from .debug_names. */
2594 create_signatured_type_table_from_debug_names
2595 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2596 const mapped_debug_names
&map
,
2597 struct dwarf2_section_info
*section
,
2598 struct dwarf2_section_info
*abbrev_section
)
2600 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2602 section
->read (objfile
);
2603 abbrev_section
->read (objfile
);
2605 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_type_units
.empty ());
2606 dwarf2_per_objfile
->per_bfd
->all_type_units
.reserve (map
.tu_count
);
2608 htab_up sig_types_hash
= allocate_signatured_type_table ();
2610 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
2612 struct signatured_type
*sig_type
;
2615 sect_offset sect_off
2616 = (sect_offset
) (extract_unsigned_integer
2617 (map
.tu_table_reordered
+ i
* map
.offset_size
,
2619 map
.dwarf5_byte_order
));
2621 comp_unit_head cu_header
;
2622 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
2624 section
->buffer
+ to_underlying (sect_off
),
2627 sig_type
= dwarf2_per_objfile
->per_bfd
->allocate_signatured_type ();
2628 sig_type
->signature
= cu_header
.signature
;
2629 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
2630 sig_type
->per_cu
.is_debug_types
= 1;
2631 sig_type
->per_cu
.section
= section
;
2632 sig_type
->per_cu
.sect_off
= sect_off
;
2633 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
2634 sig_type
->per_cu
.v
.quick
2635 = OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
2636 struct dwarf2_per_cu_quick_data
);
2638 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2641 dwarf2_per_objfile
->per_bfd
->all_type_units
.push_back (sig_type
);
2644 dwarf2_per_objfile
->per_bfd
->signatured_types
= std::move (sig_types_hash
);
2647 /* Read the address map data from the mapped index, and use it to
2648 populate the objfile's psymtabs_addrmap. */
2651 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2652 struct mapped_index
*index
)
2654 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2655 struct gdbarch
*gdbarch
= objfile
->arch ();
2656 const gdb_byte
*iter
, *end
;
2657 struct addrmap
*mutable_map
;
2660 auto_obstack temp_obstack
;
2662 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2664 iter
= index
->address_table
.data ();
2665 end
= iter
+ index
->address_table
.size ();
2667 baseaddr
= objfile
->text_section_offset ();
2671 ULONGEST hi
, lo
, cu_index
;
2672 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2674 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2676 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2681 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
2682 hex_string (lo
), hex_string (hi
));
2686 if (cu_index
>= dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ())
2688 complaint (_(".gdb_index address table has invalid CU number %u"),
2689 (unsigned) cu_index
);
2693 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
) - baseaddr
;
2694 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
) - baseaddr
;
2695 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
2696 dwarf2_per_objfile
->per_bfd
->get_cu (cu_index
));
2699 objfile
->partial_symtabs
->psymtabs_addrmap
2700 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2703 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
2704 populate the objfile's psymtabs_addrmap. */
2707 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2708 struct dwarf2_section_info
*section
)
2710 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2711 bfd
*abfd
= objfile
->obfd
;
2712 struct gdbarch
*gdbarch
= objfile
->arch ();
2713 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
2715 auto_obstack temp_obstack
;
2716 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
2718 std::unordered_map
<sect_offset
,
2719 dwarf2_per_cu_data
*,
2720 gdb::hash_enum
<sect_offset
>>
2721 debug_info_offset_to_per_cu
;
2722 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
2724 const auto insertpair
2725 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
2726 if (!insertpair
.second
)
2728 warning (_("Section .debug_aranges in %s has duplicate "
2729 "debug_info_offset %s, ignoring .debug_aranges."),
2730 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
2735 section
->read (objfile
);
2737 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
2739 const gdb_byte
*addr
= section
->buffer
;
2741 while (addr
< section
->buffer
+ section
->size
)
2743 const gdb_byte
*const entry_addr
= addr
;
2744 unsigned int bytes_read
;
2746 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
2750 const gdb_byte
*const entry_end
= addr
+ entry_length
;
2751 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
2752 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
2753 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
2755 warning (_("Section .debug_aranges in %s entry at offset %s "
2756 "length %s exceeds section length %s, "
2757 "ignoring .debug_aranges."),
2758 objfile_name (objfile
),
2759 plongest (entry_addr
- section
->buffer
),
2760 plongest (bytes_read
+ entry_length
),
2761 pulongest (section
->size
));
2765 /* The version number. */
2766 const uint16_t version
= read_2_bytes (abfd
, addr
);
2770 warning (_("Section .debug_aranges in %s entry at offset %s "
2771 "has unsupported version %d, ignoring .debug_aranges."),
2772 objfile_name (objfile
),
2773 plongest (entry_addr
- section
->buffer
), version
);
2777 const uint64_t debug_info_offset
2778 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
2779 addr
+= offset_size
;
2780 const auto per_cu_it
2781 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
2782 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
2784 warning (_("Section .debug_aranges in %s entry at offset %s "
2785 "debug_info_offset %s does not exists, "
2786 "ignoring .debug_aranges."),
2787 objfile_name (objfile
),
2788 plongest (entry_addr
- section
->buffer
),
2789 pulongest (debug_info_offset
));
2792 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
2794 const uint8_t address_size
= *addr
++;
2795 if (address_size
< 1 || address_size
> 8)
2797 warning (_("Section .debug_aranges in %s entry at offset %s "
2798 "address_size %u is invalid, ignoring .debug_aranges."),
2799 objfile_name (objfile
),
2800 plongest (entry_addr
- section
->buffer
), address_size
);
2804 const uint8_t segment_selector_size
= *addr
++;
2805 if (segment_selector_size
!= 0)
2807 warning (_("Section .debug_aranges in %s entry at offset %s "
2808 "segment_selector_size %u is not supported, "
2809 "ignoring .debug_aranges."),
2810 objfile_name (objfile
),
2811 plongest (entry_addr
- section
->buffer
),
2812 segment_selector_size
);
2816 /* Must pad to an alignment boundary that is twice the address
2817 size. It is undocumented by the DWARF standard but GCC does
2819 for (size_t padding
= ((-(addr
- section
->buffer
))
2820 & (2 * address_size
- 1));
2821 padding
> 0; padding
--)
2824 warning (_("Section .debug_aranges in %s entry at offset %s "
2825 "padding is not zero, ignoring .debug_aranges."),
2826 objfile_name (objfile
),
2827 plongest (entry_addr
- section
->buffer
));
2833 if (addr
+ 2 * address_size
> entry_end
)
2835 warning (_("Section .debug_aranges in %s entry at offset %s "
2836 "address list is not properly terminated, "
2837 "ignoring .debug_aranges."),
2838 objfile_name (objfile
),
2839 plongest (entry_addr
- section
->buffer
));
2842 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
2844 addr
+= address_size
;
2845 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
2847 addr
+= address_size
;
2848 if (start
== 0 && length
== 0)
2850 if (start
== 0 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
2852 /* Symbol was eliminated due to a COMDAT group. */
2855 ULONGEST end
= start
+ length
;
2856 start
= (gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
)
2858 end
= (gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
)
2860 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
2864 objfile
->partial_symtabs
->psymtabs_addrmap
2865 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2868 /* Find a slot in the mapped index INDEX for the object named NAME.
2869 If NAME is found, set *VEC_OUT to point to the CU vector in the
2870 constant pool and return true. If NAME cannot be found, return
2874 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2875 offset_type
**vec_out
)
2878 offset_type slot
, step
;
2879 int (*cmp
) (const char *, const char *);
2881 gdb::unique_xmalloc_ptr
<char> without_params
;
2882 if (current_language
->la_language
== language_cplus
2883 || current_language
->la_language
== language_fortran
2884 || current_language
->la_language
== language_d
)
2886 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2889 if (strchr (name
, '(') != NULL
)
2891 without_params
= cp_remove_params (name
);
2893 if (without_params
!= NULL
)
2894 name
= without_params
.get ();
2898 /* Index version 4 did not support case insensitive searches. But the
2899 indices for case insensitive languages are built in lowercase, therefore
2900 simulate our NAME being searched is also lowercased. */
2901 hash
= mapped_index_string_hash ((index
->version
== 4
2902 && case_sensitivity
== case_sensitive_off
2903 ? 5 : index
->version
),
2906 slot
= hash
& (index
->symbol_table
.size () - 1);
2907 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
2908 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2914 const auto &bucket
= index
->symbol_table
[slot
];
2915 if (bucket
.name
== 0 && bucket
.vec
== 0)
2918 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
2919 if (!cmp (name
, str
))
2921 *vec_out
= (offset_type
*) (index
->constant_pool
2922 + MAYBE_SWAP (bucket
.vec
));
2926 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
2930 /* A helper function that reads the .gdb_index from BUFFER and fills
2931 in MAP. FILENAME is the name of the file containing the data;
2932 it is used for error reporting. DEPRECATED_OK is true if it is
2933 ok to use deprecated sections.
2935 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2936 out parameters that are filled in with information about the CU and
2937 TU lists in the section.
2939 Returns true if all went well, false otherwise. */
2942 read_gdb_index_from_buffer (const char *filename
,
2944 gdb::array_view
<const gdb_byte
> buffer
,
2945 struct mapped_index
*map
,
2946 const gdb_byte
**cu_list
,
2947 offset_type
*cu_list_elements
,
2948 const gdb_byte
**types_list
,
2949 offset_type
*types_list_elements
)
2951 const gdb_byte
*addr
= &buffer
[0];
2953 /* Version check. */
2954 offset_type version
= MAYBE_SWAP (*(offset_type
*) addr
);
2955 /* Versions earlier than 3 emitted every copy of a psymbol. This
2956 causes the index to behave very poorly for certain requests. Version 3
2957 contained incomplete addrmap. So, it seems better to just ignore such
2961 static int warning_printed
= 0;
2962 if (!warning_printed
)
2964 warning (_("Skipping obsolete .gdb_index section in %s."),
2966 warning_printed
= 1;
2970 /* Index version 4 uses a different hash function than index version
2973 Versions earlier than 6 did not emit psymbols for inlined
2974 functions. Using these files will cause GDB not to be able to
2975 set breakpoints on inlined functions by name, so we ignore these
2976 indices unless the user has done
2977 "set use-deprecated-index-sections on". */
2978 if (version
< 6 && !deprecated_ok
)
2980 static int warning_printed
= 0;
2981 if (!warning_printed
)
2984 Skipping deprecated .gdb_index section in %s.\n\
2985 Do \"set use-deprecated-index-sections on\" before the file is read\n\
2986 to use the section anyway."),
2988 warning_printed
= 1;
2992 /* Version 7 indices generated by gold refer to the CU for a symbol instead
2993 of the TU (for symbols coming from TUs),
2994 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
2995 Plus gold-generated indices can have duplicate entries for global symbols,
2996 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
2997 These are just performance bugs, and we can't distinguish gdb-generated
2998 indices from gold-generated ones, so issue no warning here. */
3000 /* Indexes with higher version than the one supported by GDB may be no
3001 longer backward compatible. */
3005 map
->version
= version
;
3007 offset_type
*metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3010 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3011 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3015 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3016 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3017 - MAYBE_SWAP (metadata
[i
]))
3021 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3022 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3024 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3027 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3028 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3030 = gdb::array_view
<mapped_index::symbol_table_slot
>
3031 ((mapped_index::symbol_table_slot
*) symbol_table
,
3032 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3035 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3040 /* Callback types for dwarf2_read_gdb_index. */
3042 typedef gdb::function_view
3043 <gdb::array_view
<const gdb_byte
>(objfile
*, dwarf2_per_bfd
*)>
3044 get_gdb_index_contents_ftype
;
3045 typedef gdb::function_view
3046 <gdb::array_view
<const gdb_byte
>(objfile
*, dwz_file
*)>
3047 get_gdb_index_contents_dwz_ftype
;
3049 /* Read .gdb_index. If everything went ok, initialize the "quick"
3050 elements of all the CUs and return 1. Otherwise, return 0. */
3053 dwarf2_read_gdb_index
3054 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3055 get_gdb_index_contents_ftype get_gdb_index_contents
,
3056 get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz
)
3058 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3059 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3060 struct dwz_file
*dwz
;
3061 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3063 gdb::array_view
<const gdb_byte
> main_index_contents
3064 = get_gdb_index_contents (objfile
, dwarf2_per_objfile
->per_bfd
);
3066 if (main_index_contents
.empty ())
3069 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3070 if (!read_gdb_index_from_buffer (objfile_name (objfile
),
3071 use_deprecated_index_sections
,
3072 main_index_contents
, map
.get (), &cu_list
,
3073 &cu_list_elements
, &types_list
,
3074 &types_list_elements
))
3077 /* Don't use the index if it's empty. */
3078 if (map
->symbol_table
.empty ())
3081 /* If there is a .dwz file, read it so we can get its CU list as
3083 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
->per_bfd
);
3086 struct mapped_index dwz_map
;
3087 const gdb_byte
*dwz_types_ignore
;
3088 offset_type dwz_types_elements_ignore
;
3090 gdb::array_view
<const gdb_byte
> dwz_index_content
3091 = get_gdb_index_contents_dwz (objfile
, dwz
);
3093 if (dwz_index_content
.empty ())
3096 if (!read_gdb_index_from_buffer (bfd_get_filename (dwz
->dwz_bfd
.get ()),
3097 1, dwz_index_content
, &dwz_map
,
3098 &dwz_list
, &dwz_list_elements
,
3100 &dwz_types_elements_ignore
))
3102 warning (_("could not read '.gdb_index' section from %s; skipping"),
3103 bfd_get_filename (dwz
->dwz_bfd
.get ()));
3108 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3109 dwz_list
, dwz_list_elements
);
3111 if (types_list_elements
)
3113 /* We can only handle a single .debug_types when we have an
3115 if (dwarf2_per_objfile
->per_bfd
->types
.size () != 1)
3118 dwarf2_section_info
*section
= &dwarf2_per_objfile
->per_bfd
->types
[0];
3120 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3121 types_list
, types_list_elements
);
3124 create_addrmap_from_index (dwarf2_per_objfile
, map
.get ());
3126 dwarf2_per_objfile
->per_bfd
->index_table
= std::move (map
);
3127 dwarf2_per_objfile
->per_bfd
->using_index
= 1;
3128 dwarf2_per_objfile
->per_bfd
->quick_file_names_table
=
3129 create_quick_file_names_table (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ());
3134 /* die_reader_func for dw2_get_file_names. */
3137 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3138 const gdb_byte
*info_ptr
,
3139 struct die_info
*comp_unit_die
)
3141 struct dwarf2_cu
*cu
= reader
->cu
;
3142 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3143 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
3144 struct dwarf2_per_cu_data
*lh_cu
;
3145 struct attribute
*attr
;
3147 struct quick_file_names
*qfn
;
3149 gdb_assert (! this_cu
->is_debug_types
);
3151 /* Our callers never want to match partial units -- instead they
3152 will match the enclosing full CU. */
3153 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3155 this_cu
->v
.quick
->no_file_data
= 1;
3163 sect_offset line_offset
{};
3165 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3166 if (attr
!= nullptr)
3168 struct quick_file_names find_entry
;
3170 line_offset
= (sect_offset
) DW_UNSND (attr
);
3172 /* We may have already read in this line header (TU line header sharing).
3173 If we have we're done. */
3174 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3175 find_entry
.hash
.line_sect_off
= line_offset
;
3176 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->quick_file_names_table
.get (),
3177 &find_entry
, INSERT
);
3180 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3184 lh
= dwarf_decode_line_header (line_offset
, cu
);
3188 lh_cu
->v
.quick
->no_file_data
= 1;
3192 qfn
= XOBNEW (&dwarf2_per_objfile
->per_bfd
->obstack
, struct quick_file_names
);
3193 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3194 qfn
->hash
.line_sect_off
= line_offset
;
3195 gdb_assert (slot
!= NULL
);
3198 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3201 if (strcmp (fnd
.name
, "<unknown>") != 0)
3204 qfn
->num_file_names
= offset
+ lh
->file_names_size ();
3206 XOBNEWVEC (&dwarf2_per_objfile
->per_bfd
->obstack
, const char *,
3207 qfn
->num_file_names
);
3209 qfn
->file_names
[0] = xstrdup (fnd
.name
);
3210 for (int i
= 0; i
< lh
->file_names_size (); ++i
)
3211 qfn
->file_names
[i
+ offset
] = lh
->file_full_name (i
+ 1,
3212 fnd
.comp_dir
).release ();
3213 qfn
->real_names
= NULL
;
3215 lh_cu
->v
.quick
->file_names
= qfn
;
3218 /* A helper for the "quick" functions which attempts to read the line
3219 table for THIS_CU. */
3221 static struct quick_file_names
*
3222 dw2_get_file_names (dwarf2_per_cu_data
*this_cu
,
3223 dwarf2_per_objfile
*per_objfile
)
3225 /* This should never be called for TUs. */
3226 gdb_assert (! this_cu
->is_debug_types
);
3227 /* Nor type unit groups. */
3228 gdb_assert (! this_cu
->type_unit_group_p ());
3230 if (this_cu
->v
.quick
->file_names
!= NULL
)
3231 return this_cu
->v
.quick
->file_names
;
3232 /* If we know there is no line data, no point in looking again. */
3233 if (this_cu
->v
.quick
->no_file_data
)
3236 cutu_reader
reader (this_cu
, per_objfile
);
3237 if (!reader
.dummy_p
)
3238 dw2_get_file_names_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
);
3240 if (this_cu
->v
.quick
->no_file_data
)
3242 return this_cu
->v
.quick
->file_names
;
3245 /* A helper for the "quick" functions which computes and caches the
3246 real path for a given file name from the line table. */
3249 dw2_get_real_path (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3250 struct quick_file_names
*qfn
, int index
)
3252 if (qfn
->real_names
== NULL
)
3253 qfn
->real_names
= OBSTACK_CALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
3254 qfn
->num_file_names
, const char *);
3256 if (qfn
->real_names
[index
] == NULL
)
3257 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3259 return qfn
->real_names
[index
];
3262 static struct symtab
*
3263 dw2_find_last_source_symtab (struct objfile
*objfile
)
3265 struct dwarf2_per_objfile
*dwarf2_per_objfile
3266 = get_dwarf2_per_objfile (objfile
);
3267 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->per_bfd
->all_comp_units
.back ();
3268 compunit_symtab
*cust
3269 = dw2_instantiate_symtab (dwarf_cu
, dwarf2_per_objfile
, false);
3274 return compunit_primary_filetab (cust
);
3277 /* Traversal function for dw2_forget_cached_source_info. */
3280 dw2_free_cached_file_names (void **slot
, void *info
)
3282 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3284 if (file_data
->real_names
)
3288 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3290 xfree ((void*) file_data
->real_names
[i
]);
3291 file_data
->real_names
[i
] = NULL
;
3299 dw2_forget_cached_source_info (struct objfile
*objfile
)
3301 struct dwarf2_per_objfile
*dwarf2_per_objfile
3302 = get_dwarf2_per_objfile (objfile
);
3304 htab_traverse_noresize (dwarf2_per_objfile
->per_bfd
->quick_file_names_table
.get (),
3305 dw2_free_cached_file_names
, NULL
);
3308 /* Helper function for dw2_map_symtabs_matching_filename that expands
3309 the symtabs and calls the iterator. */
3312 dw2_map_expand_apply (struct objfile
*objfile
,
3313 struct dwarf2_per_cu_data
*per_cu
,
3314 const char *name
, const char *real_path
,
3315 gdb::function_view
<bool (symtab
*)> callback
)
3317 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3319 /* Don't visit already-expanded CUs. */
3320 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3321 if (per_objfile
->symtab_set_p (per_cu
))
3324 /* This may expand more than one symtab, and we want to iterate over
3326 dw2_instantiate_symtab (per_cu
, per_objfile
, false);
3328 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3329 last_made
, callback
);
3332 /* Implementation of the map_symtabs_matching_filename method. */
3335 dw2_map_symtabs_matching_filename
3336 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3337 gdb::function_view
<bool (symtab
*)> callback
)
3339 const char *name_basename
= lbasename (name
);
3340 struct dwarf2_per_objfile
*dwarf2_per_objfile
3341 = get_dwarf2_per_objfile (objfile
);
3343 /* The rule is CUs specify all the files, including those used by
3344 any TU, so there's no need to scan TUs here. */
3346 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
3348 /* We only need to look at symtabs not already expanded. */
3349 if (dwarf2_per_objfile
->symtab_set_p (per_cu
))
3352 quick_file_names
*file_data
3353 = dw2_get_file_names (per_cu
, dwarf2_per_objfile
);
3354 if (file_data
== NULL
)
3357 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3359 const char *this_name
= file_data
->file_names
[j
];
3360 const char *this_real_name
;
3362 if (compare_filenames_for_search (this_name
, name
))
3364 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3370 /* Before we invoke realpath, which can get expensive when many
3371 files are involved, do a quick comparison of the basenames. */
3372 if (! basenames_may_differ
3373 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3376 this_real_name
= dw2_get_real_path (dwarf2_per_objfile
,
3378 if (compare_filenames_for_search (this_real_name
, name
))
3380 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3386 if (real_path
!= NULL
)
3388 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3389 gdb_assert (IS_ABSOLUTE_PATH (name
));
3390 if (this_real_name
!= NULL
3391 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3393 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3405 /* Struct used to manage iterating over all CUs looking for a symbol. */
3407 struct dw2_symtab_iterator
3409 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3410 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3411 /* If set, only look for symbols that match that block. Valid values are
3412 GLOBAL_BLOCK and STATIC_BLOCK. */
3413 gdb::optional
<block_enum
> block_index
;
3414 /* The kind of symbol we're looking for. */
3416 /* The list of CUs from the index entry of the symbol,
3417 or NULL if not found. */
3419 /* The next element in VEC to look at. */
3421 /* The number of elements in VEC, or zero if there is no match. */
3423 /* Have we seen a global version of the symbol?
3424 If so we can ignore all further global instances.
3425 This is to work around gold/15646, inefficient gold-generated
3430 /* Initialize the index symtab iterator ITER. */
3433 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3434 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3435 gdb::optional
<block_enum
> block_index
,
3439 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3440 iter
->block_index
= block_index
;
3441 iter
->domain
= domain
;
3443 iter
->global_seen
= 0;
3445 mapped_index
*index
= dwarf2_per_objfile
->per_bfd
->index_table
.get ();
3447 /* index is NULL if OBJF_READNOW. */
3448 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3449 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3457 /* Return the next matching CU or NULL if there are no more. */
3459 static struct dwarf2_per_cu_data
*
3460 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3462 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3464 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3466 offset_type cu_index_and_attrs
=
3467 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3468 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3469 gdb_index_symbol_kind symbol_kind
=
3470 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3471 /* Only check the symbol attributes if they're present.
3472 Indices prior to version 7 don't record them,
3473 and indices >= 7 may elide them for certain symbols
3474 (gold does this). */
3476 (dwarf2_per_objfile
->per_bfd
->index_table
->version
>= 7
3477 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3479 /* Don't crash on bad data. */
3480 if (cu_index
>= (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ()
3481 + dwarf2_per_objfile
->per_bfd
->all_type_units
.size ()))
3483 complaint (_(".gdb_index entry has bad CU index"
3485 objfile_name (dwarf2_per_objfile
->objfile
));
3489 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->per_bfd
->get_cutu (cu_index
);
3491 /* Skip if already read in. */
3492 if (dwarf2_per_objfile
->symtab_set_p (per_cu
))
3495 /* Check static vs global. */
3498 bool is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3500 if (iter
->block_index
.has_value ())
3502 bool want_static
= *iter
->block_index
== STATIC_BLOCK
;
3504 if (is_static
!= want_static
)
3508 /* Work around gold/15646. */
3509 if (!is_static
&& iter
->global_seen
)
3512 iter
->global_seen
= 1;
3515 /* Only check the symbol's kind if it has one. */
3518 switch (iter
->domain
)
3521 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3522 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3523 /* Some types are also in VAR_DOMAIN. */
3524 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3528 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3532 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3536 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3551 static struct compunit_symtab
*
3552 dw2_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
3553 const char *name
, domain_enum domain
)
3555 struct compunit_symtab
*stab_best
= NULL
;
3556 struct dwarf2_per_objfile
*dwarf2_per_objfile
3557 = get_dwarf2_per_objfile (objfile
);
3559 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
3561 struct dw2_symtab_iterator iter
;
3562 struct dwarf2_per_cu_data
*per_cu
;
3564 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, block_index
, domain
, name
);
3566 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3568 struct symbol
*sym
, *with_opaque
= NULL
;
3569 struct compunit_symtab
*stab
3570 = dw2_instantiate_symtab (per_cu
, dwarf2_per_objfile
, false);
3571 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3572 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3574 sym
= block_find_symbol (block
, name
, domain
,
3575 block_find_non_opaque_type_preferred
,
3578 /* Some caution must be observed with overloaded functions
3579 and methods, since the index will not contain any overload
3580 information (but NAME might contain it). */
3583 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
3585 if (with_opaque
!= NULL
3586 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
3589 /* Keep looking through other CUs. */
3596 dw2_print_stats (struct objfile
*objfile
)
3598 struct dwarf2_per_objfile
*dwarf2_per_objfile
3599 = get_dwarf2_per_objfile (objfile
);
3600 int total
= (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ()
3601 + dwarf2_per_objfile
->per_bfd
->all_type_units
.size ());
3604 for (int i
= 0; i
< total
; ++i
)
3606 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->per_bfd
->get_cutu (i
);
3608 if (!dwarf2_per_objfile
->symtab_set_p (per_cu
))
3611 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3612 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3615 /* This dumps minimal information about the index.
3616 It is called via "mt print objfiles".
3617 One use is to verify .gdb_index has been loaded by the
3618 gdb.dwarf2/gdb-index.exp testcase. */
3621 dw2_dump (struct objfile
*objfile
)
3623 struct dwarf2_per_objfile
*dwarf2_per_objfile
3624 = get_dwarf2_per_objfile (objfile
);
3626 gdb_assert (dwarf2_per_objfile
->per_bfd
->using_index
);
3627 printf_filtered (".gdb_index:");
3628 if (dwarf2_per_objfile
->per_bfd
->index_table
!= NULL
)
3630 printf_filtered (" version %d\n",
3631 dwarf2_per_objfile
->per_bfd
->index_table
->version
);
3634 printf_filtered (" faked for \"readnow\"\n");
3635 printf_filtered ("\n");
3639 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3640 const char *func_name
)
3642 struct dwarf2_per_objfile
*dwarf2_per_objfile
3643 = get_dwarf2_per_objfile (objfile
);
3645 struct dw2_symtab_iterator iter
;
3646 struct dwarf2_per_cu_data
*per_cu
;
3648 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, {}, VAR_DOMAIN
, func_name
);
3650 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3651 dw2_instantiate_symtab (per_cu
, dwarf2_per_objfile
, false);
3656 dw2_expand_all_symtabs (struct objfile
*objfile
)
3658 struct dwarf2_per_objfile
*dwarf2_per_objfile
3659 = get_dwarf2_per_objfile (objfile
);
3660 int total_units
= (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ()
3661 + dwarf2_per_objfile
->per_bfd
->all_type_units
.size ());
3663 for (int i
= 0; i
< total_units
; ++i
)
3665 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->per_bfd
->get_cutu (i
);
3667 /* We don't want to directly expand a partial CU, because if we
3668 read it with the wrong language, then assertion failures can
3669 be triggered later on. See PR symtab/23010. So, tell
3670 dw2_instantiate_symtab to skip partial CUs -- any important
3671 partial CU will be read via DW_TAG_imported_unit anyway. */
3672 dw2_instantiate_symtab (per_cu
, dwarf2_per_objfile
, true);
3677 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3678 const char *fullname
)
3680 struct dwarf2_per_objfile
*dwarf2_per_objfile
3681 = get_dwarf2_per_objfile (objfile
);
3683 /* We don't need to consider type units here.
3684 This is only called for examining code, e.g. expand_line_sal.
3685 There can be an order of magnitude (or more) more type units
3686 than comp units, and we avoid them if we can. */
3688 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
3690 /* We only need to look at symtabs not already expanded. */
3691 if (dwarf2_per_objfile
->symtab_set_p (per_cu
))
3694 quick_file_names
*file_data
3695 = dw2_get_file_names (per_cu
, dwarf2_per_objfile
);
3696 if (file_data
== NULL
)
3699 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3701 const char *this_fullname
= file_data
->file_names
[j
];
3703 if (filename_cmp (this_fullname
, fullname
) == 0)
3705 dw2_instantiate_symtab (per_cu
, dwarf2_per_objfile
, false);
3713 dw2_expand_symtabs_matching_symbol
3714 (mapped_index_base
&index
,
3715 const lookup_name_info
&lookup_name_in
,
3716 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3717 enum search_domain kind
,
3718 gdb::function_view
<bool (offset_type
)> match_callback
);
3721 dw2_expand_symtabs_matching_one
3722 (dwarf2_per_cu_data
*per_cu
,
3723 dwarf2_per_objfile
*per_objfile
,
3724 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3725 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
);
3728 dw2_map_matching_symbols
3729 (struct objfile
*objfile
,
3730 const lookup_name_info
&name
, domain_enum domain
,
3732 gdb::function_view
<symbol_found_callback_ftype
> callback
,
3733 symbol_compare_ftype
*ordered_compare
)
3736 struct dwarf2_per_objfile
*dwarf2_per_objfile
3737 = get_dwarf2_per_objfile (objfile
);
3739 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
3741 if (dwarf2_per_objfile
->per_bfd
->index_table
!= nullptr)
3743 /* Ada currently doesn't support .gdb_index (see PR24713). We can get
3744 here though if the current language is Ada for a non-Ada objfile
3746 mapped_index
&index
= *dwarf2_per_objfile
->per_bfd
->index_table
;
3748 const char *match_name
= name
.ada ().lookup_name ().c_str ();
3749 auto matcher
= [&] (const char *symname
)
3751 if (ordered_compare
== nullptr)
3753 return ordered_compare (symname
, match_name
) == 0;
3756 dw2_expand_symtabs_matching_symbol (index
, name
, matcher
, ALL_DOMAIN
,
3757 [&] (offset_type namei
)
3759 struct dw2_symtab_iterator iter
;
3760 struct dwarf2_per_cu_data
*per_cu
;
3762 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, block_kind
, domain
,
3764 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3765 dw2_expand_symtabs_matching_one (per_cu
, dwarf2_per_objfile
, nullptr,
3772 /* We have -readnow: no .gdb_index, but no partial symtabs either. So,
3773 proceed assuming all symtabs have been read in. */
3776 for (compunit_symtab
*cust
: objfile
->compunits ())
3778 const struct block
*block
;
3782 block
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
3783 if (!iterate_over_symbols_terminated (block
, name
,
3789 /* Starting from a search name, return the string that finds the upper
3790 bound of all strings that start with SEARCH_NAME in a sorted name
3791 list. Returns the empty string to indicate that the upper bound is
3792 the end of the list. */
3795 make_sort_after_prefix_name (const char *search_name
)
3797 /* When looking to complete "func", we find the upper bound of all
3798 symbols that start with "func" by looking for where we'd insert
3799 the closest string that would follow "func" in lexicographical
3800 order. Usually, that's "func"-with-last-character-incremented,
3801 i.e. "fund". Mind non-ASCII characters, though. Usually those
3802 will be UTF-8 multi-byte sequences, but we can't be certain.
3803 Especially mind the 0xff character, which is a valid character in
3804 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
3805 rule out compilers allowing it in identifiers. Note that
3806 conveniently, strcmp/strcasecmp are specified to compare
3807 characters interpreted as unsigned char. So what we do is treat
3808 the whole string as a base 256 number composed of a sequence of
3809 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
3810 to 0, and carries 1 to the following more-significant position.
3811 If the very first character in SEARCH_NAME ends up incremented
3812 and carries/overflows, then the upper bound is the end of the
3813 list. The string after the empty string is also the empty
3816 Some examples of this operation:
3818 SEARCH_NAME => "+1" RESULT
3822 "\xff" "a" "\xff" => "\xff" "b"
3827 Then, with these symbols for example:
3833 completing "func" looks for symbols between "func" and
3834 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
3835 which finds "func" and "func1", but not "fund".
3839 funcÿ (Latin1 'ÿ' [0xff])
3843 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
3844 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
3848 ÿÿ (Latin1 'ÿ' [0xff])
3851 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
3852 the end of the list.
3854 std::string after
= search_name
;
3855 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
3857 if (!after
.empty ())
3858 after
.back () = (unsigned char) after
.back () + 1;
3862 /* See declaration. */
3864 std::pair
<std::vector
<name_component
>::const_iterator
,
3865 std::vector
<name_component
>::const_iterator
>
3866 mapped_index_base::find_name_components_bounds
3867 (const lookup_name_info
&lookup_name_without_params
, language lang
) const
3870 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3872 const char *lang_name
3873 = lookup_name_without_params
.language_lookup_name (lang
);
3875 /* Comparison function object for lower_bound that matches against a
3876 given symbol name. */
3877 auto lookup_compare_lower
= [&] (const name_component
&elem
,
3880 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
3881 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
3882 return name_cmp (elem_name
, name
) < 0;
3885 /* Comparison function object for upper_bound that matches against a
3886 given symbol name. */
3887 auto lookup_compare_upper
= [&] (const char *name
,
3888 const name_component
&elem
)
3890 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
3891 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
3892 return name_cmp (name
, elem_name
) < 0;
3895 auto begin
= this->name_components
.begin ();
3896 auto end
= this->name_components
.end ();
3898 /* Find the lower bound. */
3901 if (lookup_name_without_params
.completion_mode () && lang_name
[0] == '\0')
3904 return std::lower_bound (begin
, end
, lang_name
, lookup_compare_lower
);
3907 /* Find the upper bound. */
3910 if (lookup_name_without_params
.completion_mode ())
3912 /* In completion mode, we want UPPER to point past all
3913 symbols names that have the same prefix. I.e., with
3914 these symbols, and completing "func":
3916 function << lower bound
3918 other_function << upper bound
3920 We find the upper bound by looking for the insertion
3921 point of "func"-with-last-character-incremented,
3923 std::string after
= make_sort_after_prefix_name (lang_name
);
3926 return std::lower_bound (lower
, end
, after
.c_str (),
3927 lookup_compare_lower
);
3930 return std::upper_bound (lower
, end
, lang_name
, lookup_compare_upper
);
3933 return {lower
, upper
};
3936 /* See declaration. */
3939 mapped_index_base::build_name_components ()
3941 if (!this->name_components
.empty ())
3944 this->name_components_casing
= case_sensitivity
;
3946 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3948 /* The code below only knows how to break apart components of C++
3949 symbol names (and other languages that use '::' as
3950 namespace/module separator) and Ada symbol names. */
3951 auto count
= this->symbol_name_count ();
3952 for (offset_type idx
= 0; idx
< count
; idx
++)
3954 if (this->symbol_name_slot_invalid (idx
))
3957 const char *name
= this->symbol_name_at (idx
);
3959 /* Add each name component to the name component table. */
3960 unsigned int previous_len
= 0;
3962 if (strstr (name
, "::") != nullptr)
3964 for (unsigned int current_len
= cp_find_first_component (name
);
3965 name
[current_len
] != '\0';
3966 current_len
+= cp_find_first_component (name
+ current_len
))
3968 gdb_assert (name
[current_len
] == ':');
3969 this->name_components
.push_back ({previous_len
, idx
});
3970 /* Skip the '::'. */
3972 previous_len
= current_len
;
3977 /* Handle the Ada encoded (aka mangled) form here. */
3978 for (const char *iter
= strstr (name
, "__");
3980 iter
= strstr (iter
, "__"))
3982 this->name_components
.push_back ({previous_len
, idx
});
3984 previous_len
= iter
- name
;
3988 this->name_components
.push_back ({previous_len
, idx
});
3991 /* Sort name_components elements by name. */
3992 auto name_comp_compare
= [&] (const name_component
&left
,
3993 const name_component
&right
)
3995 const char *left_qualified
= this->symbol_name_at (left
.idx
);
3996 const char *right_qualified
= this->symbol_name_at (right
.idx
);
3998 const char *left_name
= left_qualified
+ left
.name_offset
;
3999 const char *right_name
= right_qualified
+ right
.name_offset
;
4001 return name_cmp (left_name
, right_name
) < 0;
4004 std::sort (this->name_components
.begin (),
4005 this->name_components
.end (),
4009 /* Helper for dw2_expand_symtabs_matching that works with a
4010 mapped_index_base instead of the containing objfile. This is split
4011 to a separate function in order to be able to unit test the
4012 name_components matching using a mock mapped_index_base. For each
4013 symbol name that matches, calls MATCH_CALLBACK, passing it the
4014 symbol's index in the mapped_index_base symbol table. */
4017 dw2_expand_symtabs_matching_symbol
4018 (mapped_index_base
&index
,
4019 const lookup_name_info
&lookup_name_in
,
4020 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4021 enum search_domain kind
,
4022 gdb::function_view
<bool (offset_type
)> match_callback
)
4024 lookup_name_info lookup_name_without_params
4025 = lookup_name_in
.make_ignore_params ();
4027 /* Build the symbol name component sorted vector, if we haven't
4029 index
.build_name_components ();
4031 /* The same symbol may appear more than once in the range though.
4032 E.g., if we're looking for symbols that complete "w", and we have
4033 a symbol named "w1::w2", we'll find the two name components for
4034 that same symbol in the range. To be sure we only call the
4035 callback once per symbol, we first collect the symbol name
4036 indexes that matched in a temporary vector and ignore
4038 std::vector
<offset_type
> matches
;
4040 struct name_and_matcher
4042 symbol_name_matcher_ftype
*matcher
;
4045 bool operator== (const name_and_matcher
&other
) const
4047 return matcher
== other
.matcher
&& strcmp (name
, other
.name
) == 0;
4051 /* A vector holding all the different symbol name matchers, for all
4053 std::vector
<name_and_matcher
> matchers
;
4055 for (int i
= 0; i
< nr_languages
; i
++)
4057 enum language lang_e
= (enum language
) i
;
4059 const language_defn
*lang
= language_def (lang_e
);
4060 symbol_name_matcher_ftype
*name_matcher
4061 = get_symbol_name_matcher (lang
, lookup_name_without_params
);
4063 name_and_matcher key
{
4065 lookup_name_without_params
.language_lookup_name (lang_e
)
4068 /* Don't insert the same comparison routine more than once.
4069 Note that we do this linear walk. This is not a problem in
4070 practice because the number of supported languages is
4072 if (std::find (matchers
.begin (), matchers
.end (), key
)
4075 matchers
.push_back (std::move (key
));
4078 = index
.find_name_components_bounds (lookup_name_without_params
,
4081 /* Now for each symbol name in range, check to see if we have a name
4082 match, and if so, call the MATCH_CALLBACK callback. */
4084 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4086 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4088 if (!name_matcher (qualified
, lookup_name_without_params
, NULL
)
4089 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4092 matches
.push_back (bounds
.first
->idx
);
4096 std::sort (matches
.begin (), matches
.end ());
4098 /* Finally call the callback, once per match. */
4100 for (offset_type idx
: matches
)
4104 if (!match_callback (idx
))
4110 /* Above we use a type wider than idx's for 'prev', since 0 and
4111 (offset_type)-1 are both possible values. */
4112 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4117 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4119 /* A mock .gdb_index/.debug_names-like name index table, enough to
4120 exercise dw2_expand_symtabs_matching_symbol, which works with the
4121 mapped_index_base interface. Builds an index from the symbol list
4122 passed as parameter to the constructor. */
4123 class mock_mapped_index
: public mapped_index_base
4126 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4127 : m_symbol_table (symbols
)
4130 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4132 /* Return the number of names in the symbol table. */
4133 size_t symbol_name_count () const override
4135 return m_symbol_table
.size ();
4138 /* Get the name of the symbol at IDX in the symbol table. */
4139 const char *symbol_name_at (offset_type idx
) const override
4141 return m_symbol_table
[idx
];
4145 gdb::array_view
<const char *> m_symbol_table
;
4148 /* Convenience function that converts a NULL pointer to a "<null>"
4149 string, to pass to print routines. */
4152 string_or_null (const char *str
)
4154 return str
!= NULL
? str
: "<null>";
4157 /* Check if a lookup_name_info built from
4158 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4159 index. EXPECTED_LIST is the list of expected matches, in expected
4160 matching order. If no match expected, then an empty list is
4161 specified. Returns true on success. On failure prints a warning
4162 indicating the file:line that failed, and returns false. */
4165 check_match (const char *file
, int line
,
4166 mock_mapped_index
&mock_index
,
4167 const char *name
, symbol_name_match_type match_type
,
4168 bool completion_mode
,
4169 std::initializer_list
<const char *> expected_list
)
4171 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4173 bool matched
= true;
4175 auto mismatch
= [&] (const char *expected_str
,
4178 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4179 "expected=\"%s\", got=\"%s\"\n"),
4181 (match_type
== symbol_name_match_type::FULL
4183 name
, string_or_null (expected_str
), string_or_null (got
));
4187 auto expected_it
= expected_list
.begin ();
4188 auto expected_end
= expected_list
.end ();
4190 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4192 [&] (offset_type idx
)
4194 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4195 const char *expected_str
4196 = expected_it
== expected_end
? NULL
: *expected_it
++;
4198 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4199 mismatch (expected_str
, matched_name
);
4203 const char *expected_str
4204 = expected_it
== expected_end
? NULL
: *expected_it
++;
4205 if (expected_str
!= NULL
)
4206 mismatch (expected_str
, NULL
);
4211 /* The symbols added to the mock mapped_index for testing (in
4213 static const char *test_symbols
[] = {
4222 "ns2::tmpl<int>::foo2",
4223 "(anonymous namespace)::A::B::C",
4225 /* These are used to check that the increment-last-char in the
4226 matching algorithm for completion doesn't match "t1_fund" when
4227 completing "t1_func". */
4233 /* A UTF-8 name with multi-byte sequences to make sure that
4234 cp-name-parser understands this as a single identifier ("função"
4235 is "function" in PT). */
4238 /* \377 (0xff) is Latin1 'ÿ'. */
4241 /* \377 (0xff) is Latin1 'ÿ'. */
4245 /* A name with all sorts of complications. Starts with "z" to make
4246 it easier for the completion tests below. */
4247 #define Z_SYM_NAME \
4248 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4249 "::tuple<(anonymous namespace)::ui*, " \
4250 "std::default_delete<(anonymous namespace)::ui>, void>"
4255 /* Returns true if the mapped_index_base::find_name_component_bounds
4256 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4257 in completion mode. */
4260 check_find_bounds_finds (mapped_index_base
&index
,
4261 const char *search_name
,
4262 gdb::array_view
<const char *> expected_syms
)
4264 lookup_name_info
lookup_name (search_name
,
4265 symbol_name_match_type::FULL
, true);
4267 auto bounds
= index
.find_name_components_bounds (lookup_name
,
4270 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4271 if (distance
!= expected_syms
.size ())
4274 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4276 auto nc_elem
= bounds
.first
+ exp_elem
;
4277 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4278 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4285 /* Test the lower-level mapped_index::find_name_component_bounds
4289 test_mapped_index_find_name_component_bounds ()
4291 mock_mapped_index
mock_index (test_symbols
);
4293 mock_index
.build_name_components ();
4295 /* Test the lower-level mapped_index::find_name_component_bounds
4296 method in completion mode. */
4298 static const char *expected_syms
[] = {
4303 SELF_CHECK (check_find_bounds_finds (mock_index
,
4304 "t1_func", expected_syms
));
4307 /* Check that the increment-last-char in the name matching algorithm
4308 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4310 static const char *expected_syms1
[] = {
4314 SELF_CHECK (check_find_bounds_finds (mock_index
,
4315 "\377", expected_syms1
));
4317 static const char *expected_syms2
[] = {
4320 SELF_CHECK (check_find_bounds_finds (mock_index
,
4321 "\377\377", expected_syms2
));
4325 /* Test dw2_expand_symtabs_matching_symbol. */
4328 test_dw2_expand_symtabs_matching_symbol ()
4330 mock_mapped_index
mock_index (test_symbols
);
4332 /* We let all tests run until the end even if some fails, for debug
4334 bool any_mismatch
= false;
4336 /* Create the expected symbols list (an initializer_list). Needed
4337 because lists have commas, and we need to pass them to CHECK,
4338 which is a macro. */
4339 #define EXPECT(...) { __VA_ARGS__ }
4341 /* Wrapper for check_match that passes down the current
4342 __FILE__/__LINE__. */
4343 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4344 any_mismatch |= !check_match (__FILE__, __LINE__, \
4346 NAME, MATCH_TYPE, COMPLETION_MODE, \
4349 /* Identity checks. */
4350 for (const char *sym
: test_symbols
)
4352 /* Should be able to match all existing symbols. */
4353 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4356 /* Should be able to match all existing symbols with
4358 std::string with_params
= std::string (sym
) + "(int)";
4359 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4362 /* Should be able to match all existing symbols with
4363 parameters and qualifiers. */
4364 with_params
= std::string (sym
) + " ( int ) const";
4365 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4368 /* This should really find sym, but cp-name-parser.y doesn't
4369 know about lvalue/rvalue qualifiers yet. */
4370 with_params
= std::string (sym
) + " ( int ) &&";
4371 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4375 /* Check that the name matching algorithm for completion doesn't get
4376 confused with Latin1 'ÿ' / 0xff. */
4378 static const char str
[] = "\377";
4379 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4380 EXPECT ("\377", "\377\377123"));
4383 /* Check that the increment-last-char in the matching algorithm for
4384 completion doesn't match "t1_fund" when completing "t1_func". */
4386 static const char str
[] = "t1_func";
4387 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4388 EXPECT ("t1_func", "t1_func1"));
4391 /* Check that completion mode works at each prefix of the expected
4394 static const char str
[] = "function(int)";
4395 size_t len
= strlen (str
);
4398 for (size_t i
= 1; i
< len
; i
++)
4400 lookup
.assign (str
, i
);
4401 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4402 EXPECT ("function"));
4406 /* While "w" is a prefix of both components, the match function
4407 should still only be called once. */
4409 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4411 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4415 /* Same, with a "complicated" symbol. */
4417 static const char str
[] = Z_SYM_NAME
;
4418 size_t len
= strlen (str
);
4421 for (size_t i
= 1; i
< len
; i
++)
4423 lookup
.assign (str
, i
);
4424 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4425 EXPECT (Z_SYM_NAME
));
4429 /* In FULL mode, an incomplete symbol doesn't match. */
4431 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4435 /* A complete symbol with parameters matches any overload, since the
4436 index has no overload info. */
4438 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4439 EXPECT ("std::zfunction", "std::zfunction2"));
4440 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4441 EXPECT ("std::zfunction", "std::zfunction2"));
4442 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4443 EXPECT ("std::zfunction", "std::zfunction2"));
4446 /* Check that whitespace is ignored appropriately. A symbol with a
4447 template argument list. */
4449 static const char expected
[] = "ns::foo<int>";
4450 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4452 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4456 /* Check that whitespace is ignored appropriately. A symbol with a
4457 template argument list that includes a pointer. */
4459 static const char expected
[] = "ns::foo<char*>";
4460 /* Try both completion and non-completion modes. */
4461 static const bool completion_mode
[2] = {false, true};
4462 for (size_t i
= 0; i
< 2; i
++)
4464 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4465 completion_mode
[i
], EXPECT (expected
));
4466 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4467 completion_mode
[i
], EXPECT (expected
));
4469 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4470 completion_mode
[i
], EXPECT (expected
));
4471 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4472 completion_mode
[i
], EXPECT (expected
));
4477 /* Check method qualifiers are ignored. */
4478 static const char expected
[] = "ns::foo<char*>";
4479 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4480 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4481 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4482 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4483 CHECK_MATCH ("foo < char * > ( int ) const",
4484 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4485 CHECK_MATCH ("foo < char * > ( int ) &&",
4486 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4489 /* Test lookup names that don't match anything. */
4491 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4494 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4498 /* Some wild matching tests, exercising "(anonymous namespace)",
4499 which should not be confused with a parameter list. */
4501 static const char *syms
[] = {
4505 "A :: B :: C ( int )",
4510 for (const char *s
: syms
)
4512 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4513 EXPECT ("(anonymous namespace)::A::B::C"));
4518 static const char expected
[] = "ns2::tmpl<int>::foo2";
4519 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4521 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4525 SELF_CHECK (!any_mismatch
);
4534 test_mapped_index_find_name_component_bounds ();
4535 test_dw2_expand_symtabs_matching_symbol ();
4538 }} // namespace selftests::dw2_expand_symtabs_matching
4540 #endif /* GDB_SELF_TEST */
4542 /* If FILE_MATCHER is NULL or if PER_CU has
4543 dwarf2_per_cu_quick_data::MARK set (see
4544 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4545 EXPANSION_NOTIFY on it. */
4548 dw2_expand_symtabs_matching_one
4549 (dwarf2_per_cu_data
*per_cu
,
4550 dwarf2_per_objfile
*per_objfile
,
4551 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4552 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4554 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4556 bool symtab_was_null
= !per_objfile
->symtab_set_p (per_cu
);
4558 compunit_symtab
*symtab
4559 = dw2_instantiate_symtab (per_cu
, per_objfile
, false);
4560 gdb_assert (symtab
!= nullptr);
4562 if (expansion_notify
!= NULL
&& symtab_was_null
)
4563 expansion_notify (symtab
);
4567 /* Helper for dw2_expand_matching symtabs. Called on each symbol
4568 matched, to expand corresponding CUs that were marked. IDX is the
4569 index of the symbol name that matched. */
4572 dw2_expand_marked_cus
4573 (dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
4574 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4575 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4578 offset_type
*vec
, vec_len
, vec_idx
;
4579 bool global_seen
= false;
4580 mapped_index
&index
= *dwarf2_per_objfile
->per_bfd
->index_table
;
4582 vec
= (offset_type
*) (index
.constant_pool
4583 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
4584 vec_len
= MAYBE_SWAP (vec
[0]);
4585 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
4587 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4588 /* This value is only valid for index versions >= 7. */
4589 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4590 gdb_index_symbol_kind symbol_kind
=
4591 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4592 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4593 /* Only check the symbol attributes if they're present.
4594 Indices prior to version 7 don't record them,
4595 and indices >= 7 may elide them for certain symbols
4596 (gold does this). */
4599 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4601 /* Work around gold/15646. */
4604 if (!is_static
&& global_seen
)
4610 /* Only check the symbol's kind if it has one. */
4615 case VARIABLES_DOMAIN
:
4616 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4619 case FUNCTIONS_DOMAIN
:
4620 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4624 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4627 case MODULES_DOMAIN
:
4628 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4636 /* Don't crash on bad data. */
4637 if (cu_index
>= (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ()
4638 + dwarf2_per_objfile
->per_bfd
->all_type_units
.size ()))
4640 complaint (_(".gdb_index entry has bad CU index"
4642 objfile_name (dwarf2_per_objfile
->objfile
));
4646 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->per_bfd
->get_cutu (cu_index
);
4647 dw2_expand_symtabs_matching_one (per_cu
, dwarf2_per_objfile
, file_matcher
,
4652 /* If FILE_MATCHER is non-NULL, set all the
4653 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
4654 that match FILE_MATCHER. */
4657 dw_expand_symtabs_matching_file_matcher
4658 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
4659 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
4661 if (file_matcher
== NULL
)
4664 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
4666 NULL
, xcalloc
, xfree
));
4667 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
4669 NULL
, xcalloc
, xfree
));
4671 /* The rule is CUs specify all the files, including those used by
4672 any TU, so there's no need to scan TUs here. */
4674 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
4678 per_cu
->v
.quick
->mark
= 0;
4680 /* We only need to look at symtabs not already expanded. */
4681 if (dwarf2_per_objfile
->symtab_set_p (per_cu
))
4684 quick_file_names
*file_data
4685 = dw2_get_file_names (per_cu
, dwarf2_per_objfile
);
4686 if (file_data
== NULL
)
4689 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
4691 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
4693 per_cu
->v
.quick
->mark
= 1;
4697 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4699 const char *this_real_name
;
4701 if (file_matcher (file_data
->file_names
[j
], false))
4703 per_cu
->v
.quick
->mark
= 1;
4707 /* Before we invoke realpath, which can get expensive when many
4708 files are involved, do a quick comparison of the basenames. */
4709 if (!basenames_may_differ
4710 && !file_matcher (lbasename (file_data
->file_names
[j
]),
4714 this_real_name
= dw2_get_real_path (dwarf2_per_objfile
,
4716 if (file_matcher (this_real_name
, false))
4718 per_cu
->v
.quick
->mark
= 1;
4723 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
4724 ? visited_found
.get ()
4725 : visited_not_found
.get (),
4732 dw2_expand_symtabs_matching
4733 (struct objfile
*objfile
,
4734 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4735 const lookup_name_info
*lookup_name
,
4736 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4737 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4738 enum search_domain kind
)
4740 struct dwarf2_per_objfile
*dwarf2_per_objfile
4741 = get_dwarf2_per_objfile (objfile
);
4743 /* index_table is NULL if OBJF_READNOW. */
4744 if (!dwarf2_per_objfile
->per_bfd
->index_table
)
4747 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
4749 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
4751 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
4755 dw2_expand_symtabs_matching_one (per_cu
, dwarf2_per_objfile
,
4756 file_matcher
, expansion_notify
);
4761 mapped_index
&index
= *dwarf2_per_objfile
->per_bfd
->index_table
;
4763 dw2_expand_symtabs_matching_symbol (index
, *lookup_name
,
4765 kind
, [&] (offset_type idx
)
4767 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
4768 expansion_notify
, kind
);
4773 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4776 static struct compunit_symtab
*
4777 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4782 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4783 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4786 if (cust
->includes
== NULL
)
4789 for (i
= 0; cust
->includes
[i
]; ++i
)
4791 struct compunit_symtab
*s
= cust
->includes
[i
];
4793 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4801 static struct compunit_symtab
*
4802 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4803 struct bound_minimal_symbol msymbol
,
4805 struct obj_section
*section
,
4808 struct dwarf2_per_cu_data
*data
;
4809 struct compunit_symtab
*result
;
4811 if (!objfile
->partial_symtabs
->psymtabs_addrmap
)
4814 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
4815 data
= (struct dwarf2_per_cu_data
*) addrmap_find
4816 (objfile
->partial_symtabs
->psymtabs_addrmap
, pc
- baseaddr
);
4820 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
4821 if (warn_if_readin
&& per_objfile
->symtab_set_p (data
))
4822 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4823 paddress (objfile
->arch (), pc
));
4825 result
= recursively_find_pc_sect_compunit_symtab
4826 (dw2_instantiate_symtab (data
, per_objfile
, false), pc
);
4828 gdb_assert (result
!= NULL
);
4833 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4834 void *data
, int need_fullname
)
4836 struct dwarf2_per_objfile
*dwarf2_per_objfile
4837 = get_dwarf2_per_objfile (objfile
);
4839 if (!dwarf2_per_objfile
->per_bfd
->filenames_cache
)
4841 dwarf2_per_objfile
->per_bfd
->filenames_cache
.emplace ();
4843 htab_up
visited (htab_create_alloc (10,
4844 htab_hash_pointer
, htab_eq_pointer
,
4845 NULL
, xcalloc
, xfree
));
4847 /* The rule is CUs specify all the files, including those used
4848 by any TU, so there's no need to scan TUs here. We can
4849 ignore file names coming from already-expanded CUs. */
4851 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
4853 if (dwarf2_per_objfile
->symtab_set_p (per_cu
))
4855 void **slot
= htab_find_slot (visited
.get (),
4856 per_cu
->v
.quick
->file_names
,
4859 *slot
= per_cu
->v
.quick
->file_names
;
4863 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
4865 /* We only need to look at symtabs not already expanded. */
4866 if (dwarf2_per_objfile
->symtab_set_p (per_cu
))
4869 quick_file_names
*file_data
4870 = dw2_get_file_names (per_cu
, dwarf2_per_objfile
);
4871 if (file_data
== NULL
)
4874 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
4877 /* Already visited. */
4882 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4884 const char *filename
= file_data
->file_names
[j
];
4885 dwarf2_per_objfile
->per_bfd
->filenames_cache
->seen (filename
);
4890 dwarf2_per_objfile
->per_bfd
->filenames_cache
->traverse ([&] (const char *filename
)
4892 gdb::unique_xmalloc_ptr
<char> this_real_name
;
4895 this_real_name
= gdb_realpath (filename
);
4896 (*fun
) (filename
, this_real_name
.get (), data
);
4901 dw2_has_symbols (struct objfile
*objfile
)
4906 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4909 dw2_find_last_source_symtab
,
4910 dw2_forget_cached_source_info
,
4911 dw2_map_symtabs_matching_filename
,
4916 dw2_expand_symtabs_for_function
,
4917 dw2_expand_all_symtabs
,
4918 dw2_expand_symtabs_with_fullname
,
4919 dw2_map_matching_symbols
,
4920 dw2_expand_symtabs_matching
,
4921 dw2_find_pc_sect_compunit_symtab
,
4923 dw2_map_symbol_filenames
4926 /* DWARF-5 debug_names reader. */
4928 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
4929 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
4931 /* A helper function that reads the .debug_names section in SECTION
4932 and fills in MAP. FILENAME is the name of the file containing the
4933 section; it is used for error reporting.
4935 Returns true if all went well, false otherwise. */
4938 read_debug_names_from_section (struct objfile
*objfile
,
4939 const char *filename
,
4940 struct dwarf2_section_info
*section
,
4941 mapped_debug_names
&map
)
4943 if (section
->empty ())
4946 /* Older elfutils strip versions could keep the section in the main
4947 executable while splitting it for the separate debug info file. */
4948 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
4951 section
->read (objfile
);
4953 map
.dwarf5_byte_order
= gdbarch_byte_order (objfile
->arch ());
4955 const gdb_byte
*addr
= section
->buffer
;
4957 bfd
*const abfd
= section
->get_bfd_owner ();
4959 unsigned int bytes_read
;
4960 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
4963 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
4964 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
4965 if (bytes_read
+ length
!= section
->size
)
4967 /* There may be multiple per-CU indices. */
4968 warning (_("Section .debug_names in %s length %s does not match "
4969 "section length %s, ignoring .debug_names."),
4970 filename
, plongest (bytes_read
+ length
),
4971 pulongest (section
->size
));
4975 /* The version number. */
4976 uint16_t version
= read_2_bytes (abfd
, addr
);
4980 warning (_("Section .debug_names in %s has unsupported version %d, "
4981 "ignoring .debug_names."),
4987 uint16_t padding
= read_2_bytes (abfd
, addr
);
4991 warning (_("Section .debug_names in %s has unsupported padding %d, "
4992 "ignoring .debug_names."),
4997 /* comp_unit_count - The number of CUs in the CU list. */
4998 map
.cu_count
= read_4_bytes (abfd
, addr
);
5001 /* local_type_unit_count - The number of TUs in the local TU
5003 map
.tu_count
= read_4_bytes (abfd
, addr
);
5006 /* foreign_type_unit_count - The number of TUs in the foreign TU
5008 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
5010 if (foreign_tu_count
!= 0)
5012 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
5013 "ignoring .debug_names."),
5014 filename
, static_cast<unsigned long> (foreign_tu_count
));
5018 /* bucket_count - The number of hash buckets in the hash lookup
5020 map
.bucket_count
= read_4_bytes (abfd
, addr
);
5023 /* name_count - The number of unique names in the index. */
5024 map
.name_count
= read_4_bytes (abfd
, addr
);
5027 /* abbrev_table_size - The size in bytes of the abbreviations
5029 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
5032 /* augmentation_string_size - The size in bytes of the augmentation
5033 string. This value is rounded up to a multiple of 4. */
5034 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
5036 map
.augmentation_is_gdb
= ((augmentation_string_size
5037 == sizeof (dwarf5_augmentation
))
5038 && memcmp (addr
, dwarf5_augmentation
,
5039 sizeof (dwarf5_augmentation
)) == 0);
5040 augmentation_string_size
+= (-augmentation_string_size
) & 3;
5041 addr
+= augmentation_string_size
;
5044 map
.cu_table_reordered
= addr
;
5045 addr
+= map
.cu_count
* map
.offset_size
;
5047 /* List of Local TUs */
5048 map
.tu_table_reordered
= addr
;
5049 addr
+= map
.tu_count
* map
.offset_size
;
5051 /* Hash Lookup Table */
5052 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5053 addr
+= map
.bucket_count
* 4;
5054 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5055 addr
+= map
.name_count
* 4;
5058 map
.name_table_string_offs_reordered
= addr
;
5059 addr
+= map
.name_count
* map
.offset_size
;
5060 map
.name_table_entry_offs_reordered
= addr
;
5061 addr
+= map
.name_count
* map
.offset_size
;
5063 const gdb_byte
*abbrev_table_start
= addr
;
5066 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5071 const auto insertpair
5072 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5073 if (!insertpair
.second
)
5075 warning (_("Section .debug_names in %s has duplicate index %s, "
5076 "ignoring .debug_names."),
5077 filename
, pulongest (index_num
));
5080 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5081 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5086 mapped_debug_names::index_val::attr attr
;
5087 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5089 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5091 if (attr
.form
== DW_FORM_implicit_const
)
5093 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5097 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5099 indexval
.attr_vec
.push_back (std::move (attr
));
5102 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5104 warning (_("Section .debug_names in %s has abbreviation_table "
5105 "of size %s vs. written as %u, ignoring .debug_names."),
5106 filename
, plongest (addr
- abbrev_table_start
),
5110 map
.entry_pool
= addr
;
5115 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5119 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5120 const mapped_debug_names
&map
,
5121 dwarf2_section_info
§ion
,
5124 if (!map
.augmentation_is_gdb
)
5126 for (uint32_t i
= 0; i
< map
.cu_count
; ++i
)
5128 sect_offset sect_off
5129 = (sect_offset
) (extract_unsigned_integer
5130 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5132 map
.dwarf5_byte_order
));
5133 /* We don't know the length of the CU, because the CU list in a
5134 .debug_names index can be incomplete, so we can't use the start of
5135 the next CU as end of this CU. We create the CUs here with length 0,
5136 and in cutu_reader::cutu_reader we'll fill in the actual length. */
5137 dwarf2_per_cu_data
*per_cu
5138 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5140 dwarf2_per_objfile
->per_bfd
->all_comp_units
.push_back (per_cu
);
5144 sect_offset sect_off_prev
;
5145 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5147 sect_offset sect_off_next
;
5148 if (i
< map
.cu_count
)
5151 = (sect_offset
) (extract_unsigned_integer
5152 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5154 map
.dwarf5_byte_order
));
5157 sect_off_next
= (sect_offset
) section
.size
;
5160 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5161 dwarf2_per_cu_data
*per_cu
5162 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5163 sect_off_prev
, length
);
5164 dwarf2_per_objfile
->per_bfd
->all_comp_units
.push_back (per_cu
);
5166 sect_off_prev
= sect_off_next
;
5170 /* Read the CU list from the mapped index, and use it to create all
5171 the CU objects for this dwarf2_per_objfile. */
5174 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5175 const mapped_debug_names
&map
,
5176 const mapped_debug_names
&dwz_map
)
5178 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_comp_units
.empty ());
5179 dwarf2_per_objfile
->per_bfd
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5181 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5182 dwarf2_per_objfile
->per_bfd
->info
,
5183 false /* is_dwz */);
5185 if (dwz_map
.cu_count
== 0)
5188 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
->per_bfd
);
5189 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5193 /* Read .debug_names. If everything went ok, initialize the "quick"
5194 elements of all the CUs and return true. Otherwise, return false. */
5197 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5199 std::unique_ptr
<mapped_debug_names
> map
5200 (new mapped_debug_names (dwarf2_per_objfile
));
5201 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5202 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5204 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5205 &dwarf2_per_objfile
->per_bfd
->debug_names
,
5209 /* Don't use the index if it's empty. */
5210 if (map
->name_count
== 0)
5213 /* If there is a .dwz file, read it so we can get its CU list as
5215 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
->per_bfd
);
5218 if (!read_debug_names_from_section (objfile
,
5219 bfd_get_filename (dwz
->dwz_bfd
.get ()),
5220 &dwz
->debug_names
, dwz_map
))
5222 warning (_("could not read '.debug_names' section from %s; skipping"),
5223 bfd_get_filename (dwz
->dwz_bfd
.get ()));
5228 create_cus_from_debug_names (dwarf2_per_objfile
, *map
, dwz_map
);
5230 if (map
->tu_count
!= 0)
5232 /* We can only handle a single .debug_types when we have an
5234 if (dwarf2_per_objfile
->per_bfd
->types
.size () != 1)
5237 dwarf2_section_info
*section
= &dwarf2_per_objfile
->per_bfd
->types
[0];
5239 create_signatured_type_table_from_debug_names
5240 (dwarf2_per_objfile
, *map
, section
, &dwarf2_per_objfile
->per_bfd
->abbrev
);
5243 create_addrmap_from_aranges (dwarf2_per_objfile
,
5244 &dwarf2_per_objfile
->per_bfd
->debug_aranges
);
5246 dwarf2_per_objfile
->per_bfd
->debug_names_table
= std::move (map
);
5247 dwarf2_per_objfile
->per_bfd
->using_index
= 1;
5248 dwarf2_per_objfile
->per_bfd
->quick_file_names_table
=
5249 create_quick_file_names_table (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ());
5254 /* Type used to manage iterating over all CUs looking for a symbol for
5257 class dw2_debug_names_iterator
5260 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5261 gdb::optional
<block_enum
> block_index
,
5264 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5265 m_addr (find_vec_in_debug_names (map
, name
))
5268 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5269 search_domain search
, uint32_t namei
)
5272 m_addr (find_vec_in_debug_names (map
, namei
))
5275 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5276 block_enum block_index
, domain_enum domain
,
5278 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5279 m_addr (find_vec_in_debug_names (map
, namei
))
5282 /* Return the next matching CU or NULL if there are no more. */
5283 dwarf2_per_cu_data
*next ();
5286 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5288 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5291 /* The internalized form of .debug_names. */
5292 const mapped_debug_names
&m_map
;
5294 /* If set, only look for symbols that match that block. Valid values are
5295 GLOBAL_BLOCK and STATIC_BLOCK. */
5296 const gdb::optional
<block_enum
> m_block_index
;
5298 /* The kind of symbol we're looking for. */
5299 const domain_enum m_domain
= UNDEF_DOMAIN
;
5300 const search_domain m_search
= ALL_DOMAIN
;
5302 /* The list of CUs from the index entry of the symbol, or NULL if
5304 const gdb_byte
*m_addr
;
5308 mapped_debug_names::namei_to_name (uint32_t namei
) const
5310 const ULONGEST namei_string_offs
5311 = extract_unsigned_integer ((name_table_string_offs_reordered
5312 + namei
* offset_size
),
5315 return read_indirect_string_at_offset (dwarf2_per_objfile
,
5319 /* Find a slot in .debug_names for the object named NAME. If NAME is
5320 found, return pointer to its pool data. If NAME cannot be found,
5324 dw2_debug_names_iterator::find_vec_in_debug_names
5325 (const mapped_debug_names
&map
, const char *name
)
5327 int (*cmp
) (const char *, const char *);
5329 gdb::unique_xmalloc_ptr
<char> without_params
;
5330 if (current_language
->la_language
== language_cplus
5331 || current_language
->la_language
== language_fortran
5332 || current_language
->la_language
== language_d
)
5334 /* NAME is already canonical. Drop any qualifiers as
5335 .debug_names does not contain any. */
5337 if (strchr (name
, '(') != NULL
)
5339 without_params
= cp_remove_params (name
);
5340 if (without_params
!= NULL
)
5341 name
= without_params
.get ();
5345 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5347 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5349 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5350 (map
.bucket_table_reordered
5351 + (full_hash
% map
.bucket_count
)), 4,
5352 map
.dwarf5_byte_order
);
5356 if (namei
>= map
.name_count
)
5358 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5360 namei
, map
.name_count
,
5361 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5367 const uint32_t namei_full_hash
5368 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5369 (map
.hash_table_reordered
+ namei
), 4,
5370 map
.dwarf5_byte_order
);
5371 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5374 if (full_hash
== namei_full_hash
)
5376 const char *const namei_string
= map
.namei_to_name (namei
);
5378 #if 0 /* An expensive sanity check. */
5379 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5381 complaint (_("Wrong .debug_names hash for string at index %u "
5383 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5388 if (cmp (namei_string
, name
) == 0)
5390 const ULONGEST namei_entry_offs
5391 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5392 + namei
* map
.offset_size
),
5393 map
.offset_size
, map
.dwarf5_byte_order
);
5394 return map
.entry_pool
+ namei_entry_offs
;
5399 if (namei
>= map
.name_count
)
5405 dw2_debug_names_iterator::find_vec_in_debug_names
5406 (const mapped_debug_names
&map
, uint32_t namei
)
5408 if (namei
>= map
.name_count
)
5410 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5412 namei
, map
.name_count
,
5413 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5417 const ULONGEST namei_entry_offs
5418 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5419 + namei
* map
.offset_size
),
5420 map
.offset_size
, map
.dwarf5_byte_order
);
5421 return map
.entry_pool
+ namei_entry_offs
;
5424 /* See dw2_debug_names_iterator. */
5426 dwarf2_per_cu_data
*
5427 dw2_debug_names_iterator::next ()
5432 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5433 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5434 bfd
*const abfd
= objfile
->obfd
;
5438 unsigned int bytes_read
;
5439 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5440 m_addr
+= bytes_read
;
5444 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5445 if (indexval_it
== m_map
.abbrev_map
.cend ())
5447 complaint (_("Wrong .debug_names undefined abbrev code %s "
5449 pulongest (abbrev
), objfile_name (objfile
));
5452 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5453 enum class symbol_linkage
{
5457 } symbol_linkage_
= symbol_linkage::unknown
;
5458 dwarf2_per_cu_data
*per_cu
= NULL
;
5459 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5464 case DW_FORM_implicit_const
:
5465 ull
= attr
.implicit_const
;
5467 case DW_FORM_flag_present
:
5471 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5472 m_addr
+= bytes_read
;
5475 ull
= read_4_bytes (abfd
, m_addr
);
5479 ull
= read_8_bytes (abfd
, m_addr
);
5482 case DW_FORM_ref_sig8
:
5483 ull
= read_8_bytes (abfd
, m_addr
);
5487 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5488 dwarf_form_name (attr
.form
),
5489 objfile_name (objfile
));
5492 switch (attr
.dw_idx
)
5494 case DW_IDX_compile_unit
:
5495 /* Don't crash on bad data. */
5496 if (ull
>= dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ())
5498 complaint (_(".debug_names entry has bad CU index %s"
5501 objfile_name (dwarf2_per_objfile
->objfile
));
5504 per_cu
= dwarf2_per_objfile
->per_bfd
->get_cutu (ull
);
5506 case DW_IDX_type_unit
:
5507 /* Don't crash on bad data. */
5508 if (ull
>= dwarf2_per_objfile
->per_bfd
->all_type_units
.size ())
5510 complaint (_(".debug_names entry has bad TU index %s"
5513 objfile_name (dwarf2_per_objfile
->objfile
));
5516 per_cu
= &dwarf2_per_objfile
->per_bfd
->get_tu (ull
)->per_cu
;
5518 case DW_IDX_die_offset
:
5519 /* In a per-CU index (as opposed to a per-module index), index
5520 entries without CU attribute implicitly refer to the single CU. */
5522 per_cu
= dwarf2_per_objfile
->per_bfd
->get_cu (0);
5524 case DW_IDX_GNU_internal
:
5525 if (!m_map
.augmentation_is_gdb
)
5527 symbol_linkage_
= symbol_linkage::static_
;
5529 case DW_IDX_GNU_external
:
5530 if (!m_map
.augmentation_is_gdb
)
5532 symbol_linkage_
= symbol_linkage::extern_
;
5537 /* Skip if already read in. */
5538 if (dwarf2_per_objfile
->symtab_set_p (per_cu
))
5541 /* Check static vs global. */
5542 if (symbol_linkage_
!= symbol_linkage::unknown
&& m_block_index
.has_value ())
5544 const bool want_static
= *m_block_index
== STATIC_BLOCK
;
5545 const bool symbol_is_static
=
5546 symbol_linkage_
== symbol_linkage::static_
;
5547 if (want_static
!= symbol_is_static
)
5551 /* Match dw2_symtab_iter_next, symbol_kind
5552 and debug_names::psymbol_tag. */
5556 switch (indexval
.dwarf_tag
)
5558 case DW_TAG_variable
:
5559 case DW_TAG_subprogram
:
5560 /* Some types are also in VAR_DOMAIN. */
5561 case DW_TAG_typedef
:
5562 case DW_TAG_structure_type
:
5569 switch (indexval
.dwarf_tag
)
5571 case DW_TAG_typedef
:
5572 case DW_TAG_structure_type
:
5579 switch (indexval
.dwarf_tag
)
5582 case DW_TAG_variable
:
5589 switch (indexval
.dwarf_tag
)
5601 /* Match dw2_expand_symtabs_matching, symbol_kind and
5602 debug_names::psymbol_tag. */
5605 case VARIABLES_DOMAIN
:
5606 switch (indexval
.dwarf_tag
)
5608 case DW_TAG_variable
:
5614 case FUNCTIONS_DOMAIN
:
5615 switch (indexval
.dwarf_tag
)
5617 case DW_TAG_subprogram
:
5624 switch (indexval
.dwarf_tag
)
5626 case DW_TAG_typedef
:
5627 case DW_TAG_structure_type
:
5633 case MODULES_DOMAIN
:
5634 switch (indexval
.dwarf_tag
)
5648 static struct compunit_symtab
*
5649 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
5650 const char *name
, domain_enum domain
)
5652 struct dwarf2_per_objfile
*dwarf2_per_objfile
5653 = get_dwarf2_per_objfile (objfile
);
5655 const auto &mapp
= dwarf2_per_objfile
->per_bfd
->debug_names_table
;
5658 /* index is NULL if OBJF_READNOW. */
5661 const auto &map
= *mapp
;
5663 dw2_debug_names_iterator
iter (map
, block_index
, domain
, name
);
5665 struct compunit_symtab
*stab_best
= NULL
;
5666 struct dwarf2_per_cu_data
*per_cu
;
5667 while ((per_cu
= iter
.next ()) != NULL
)
5669 struct symbol
*sym
, *with_opaque
= NULL
;
5670 compunit_symtab
*stab
5671 = dw2_instantiate_symtab (per_cu
, dwarf2_per_objfile
, false);
5672 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
5673 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
5675 sym
= block_find_symbol (block
, name
, domain
,
5676 block_find_non_opaque_type_preferred
,
5679 /* Some caution must be observed with overloaded functions and
5680 methods, since the index will not contain any overload
5681 information (but NAME might contain it). */
5684 && strcmp_iw (sym
->search_name (), name
) == 0)
5686 if (with_opaque
!= NULL
5687 && strcmp_iw (with_opaque
->search_name (), name
) == 0)
5690 /* Keep looking through other CUs. */
5696 /* This dumps minimal information about .debug_names. It is called
5697 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
5698 uses this to verify that .debug_names has been loaded. */
5701 dw2_debug_names_dump (struct objfile
*objfile
)
5703 struct dwarf2_per_objfile
*dwarf2_per_objfile
5704 = get_dwarf2_per_objfile (objfile
);
5706 gdb_assert (dwarf2_per_objfile
->per_bfd
->using_index
);
5707 printf_filtered (".debug_names:");
5708 if (dwarf2_per_objfile
->per_bfd
->debug_names_table
)
5709 printf_filtered (" exists\n");
5711 printf_filtered (" faked for \"readnow\"\n");
5712 printf_filtered ("\n");
5716 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
5717 const char *func_name
)
5719 struct dwarf2_per_objfile
*dwarf2_per_objfile
5720 = get_dwarf2_per_objfile (objfile
);
5722 /* dwarf2_per_objfile->per_bfd->debug_names_table is NULL if OBJF_READNOW. */
5723 if (dwarf2_per_objfile
->per_bfd
->debug_names_table
)
5725 const mapped_debug_names
&map
= *dwarf2_per_objfile
->per_bfd
->debug_names_table
;
5727 dw2_debug_names_iterator
iter (map
, {}, VAR_DOMAIN
, func_name
);
5729 struct dwarf2_per_cu_data
*per_cu
;
5730 while ((per_cu
= iter
.next ()) != NULL
)
5731 dw2_instantiate_symtab (per_cu
, dwarf2_per_objfile
, false);
5736 dw2_debug_names_map_matching_symbols
5737 (struct objfile
*objfile
,
5738 const lookup_name_info
&name
, domain_enum domain
,
5740 gdb::function_view
<symbol_found_callback_ftype
> callback
,
5741 symbol_compare_ftype
*ordered_compare
)
5743 struct dwarf2_per_objfile
*dwarf2_per_objfile
5744 = get_dwarf2_per_objfile (objfile
);
5746 /* debug_names_table is NULL if OBJF_READNOW. */
5747 if (!dwarf2_per_objfile
->per_bfd
->debug_names_table
)
5750 mapped_debug_names
&map
= *dwarf2_per_objfile
->per_bfd
->debug_names_table
;
5751 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
5753 const char *match_name
= name
.ada ().lookup_name ().c_str ();
5754 auto matcher
= [&] (const char *symname
)
5756 if (ordered_compare
== nullptr)
5758 return ordered_compare (symname
, match_name
) == 0;
5761 dw2_expand_symtabs_matching_symbol (map
, name
, matcher
, ALL_DOMAIN
,
5762 [&] (offset_type namei
)
5764 /* The name was matched, now expand corresponding CUs that were
5766 dw2_debug_names_iterator
iter (map
, block_kind
, domain
, namei
);
5768 struct dwarf2_per_cu_data
*per_cu
;
5769 while ((per_cu
= iter
.next ()) != NULL
)
5770 dw2_expand_symtabs_matching_one (per_cu
, dwarf2_per_objfile
, nullptr,
5775 /* It's a shame we couldn't do this inside the
5776 dw2_expand_symtabs_matching_symbol callback, but that skips CUs
5777 that have already been expanded. Instead, this loop matches what
5778 the psymtab code does. */
5779 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
5781 compunit_symtab
*symtab
= dwarf2_per_objfile
->get_symtab (per_cu
);
5782 if (symtab
!= nullptr)
5784 const struct block
*block
5785 = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (symtab
), block_kind
);
5786 if (!iterate_over_symbols_terminated (block
, name
,
5794 dw2_debug_names_expand_symtabs_matching
5795 (struct objfile
*objfile
,
5796 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5797 const lookup_name_info
*lookup_name
,
5798 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5799 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5800 enum search_domain kind
)
5802 struct dwarf2_per_objfile
*dwarf2_per_objfile
5803 = get_dwarf2_per_objfile (objfile
);
5805 /* debug_names_table is NULL if OBJF_READNOW. */
5806 if (!dwarf2_per_objfile
->per_bfd
->debug_names_table
)
5809 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5811 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
5813 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
5817 dw2_expand_symtabs_matching_one (per_cu
, dwarf2_per_objfile
,
5818 file_matcher
, expansion_notify
);
5823 mapped_debug_names
&map
= *dwarf2_per_objfile
->per_bfd
->debug_names_table
;
5825 dw2_expand_symtabs_matching_symbol (map
, *lookup_name
,
5827 kind
, [&] (offset_type namei
)
5829 /* The name was matched, now expand corresponding CUs that were
5831 dw2_debug_names_iterator
iter (map
, kind
, namei
);
5833 struct dwarf2_per_cu_data
*per_cu
;
5834 while ((per_cu
= iter
.next ()) != NULL
)
5835 dw2_expand_symtabs_matching_one (per_cu
, dwarf2_per_objfile
,
5836 file_matcher
, expansion_notify
);
5841 const struct quick_symbol_functions dwarf2_debug_names_functions
=
5844 dw2_find_last_source_symtab
,
5845 dw2_forget_cached_source_info
,
5846 dw2_map_symtabs_matching_filename
,
5847 dw2_debug_names_lookup_symbol
,
5850 dw2_debug_names_dump
,
5851 dw2_debug_names_expand_symtabs_for_function
,
5852 dw2_expand_all_symtabs
,
5853 dw2_expand_symtabs_with_fullname
,
5854 dw2_debug_names_map_matching_symbols
,
5855 dw2_debug_names_expand_symtabs_matching
,
5856 dw2_find_pc_sect_compunit_symtab
,
5858 dw2_map_symbol_filenames
5861 /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
5862 to either a dwarf2_per_bfd or dwz_file object. */
5864 template <typename T
>
5865 static gdb::array_view
<const gdb_byte
>
5866 get_gdb_index_contents_from_section (objfile
*obj
, T
*section_owner
)
5868 dwarf2_section_info
*section
= §ion_owner
->gdb_index
;
5870 if (section
->empty ())
5873 /* Older elfutils strip versions could keep the section in the main
5874 executable while splitting it for the separate debug info file. */
5875 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
5878 section
->read (obj
);
5880 /* dwarf2_section_info::size is a bfd_size_type, while
5881 gdb::array_view works with size_t. On 32-bit hosts, with
5882 --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t
5883 is 32-bit. So we need an explicit narrowing conversion here.
5884 This is fine, because it's impossible to allocate or mmap an
5885 array/buffer larger than what size_t can represent. */
5886 return gdb::make_array_view (section
->buffer
, section
->size
);
5889 /* Lookup the index cache for the contents of the index associated to
5892 static gdb::array_view
<const gdb_byte
>
5893 get_gdb_index_contents_from_cache (objfile
*obj
, dwarf2_per_bfd
*dwarf2_per_bfd
)
5895 const bfd_build_id
*build_id
= build_id_bfd_get (obj
->obfd
);
5896 if (build_id
== nullptr)
5899 return global_index_cache
.lookup_gdb_index (build_id
,
5900 &dwarf2_per_bfd
->index_cache_res
);
5903 /* Same as the above, but for DWZ. */
5905 static gdb::array_view
<const gdb_byte
>
5906 get_gdb_index_contents_from_cache_dwz (objfile
*obj
, dwz_file
*dwz
)
5908 const bfd_build_id
*build_id
= build_id_bfd_get (dwz
->dwz_bfd
.get ());
5909 if (build_id
== nullptr)
5912 return global_index_cache
.lookup_gdb_index (build_id
, &dwz
->index_cache_res
);
5915 /* See symfile.h. */
5918 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
5920 struct dwarf2_per_objfile
*dwarf2_per_objfile
5921 = get_dwarf2_per_objfile (objfile
);
5923 /* If we're about to read full symbols, don't bother with the
5924 indices. In this case we also don't care if some other debug
5925 format is making psymtabs, because they are all about to be
5927 if ((objfile
->flags
& OBJF_READNOW
))
5929 dwarf2_per_objfile
->per_bfd
->using_index
= 1;
5930 create_all_comp_units (dwarf2_per_objfile
);
5931 create_all_type_units (dwarf2_per_objfile
);
5932 dwarf2_per_objfile
->per_bfd
->quick_file_names_table
5933 = create_quick_file_names_table
5934 (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ());
5935 dwarf2_per_objfile
->resize_symtabs ();
5937 for (int i
= 0; i
< (dwarf2_per_objfile
->per_bfd
->all_comp_units
.size ()
5938 + dwarf2_per_objfile
->per_bfd
->all_type_units
.size ()); ++i
)
5940 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->per_bfd
->get_cutu (i
);
5942 per_cu
->v
.quick
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
5943 struct dwarf2_per_cu_quick_data
);
5946 /* Return 1 so that gdb sees the "quick" functions. However,
5947 these functions will be no-ops because we will have expanded
5949 *index_kind
= dw_index_kind::GDB_INDEX
;
5953 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
5955 *index_kind
= dw_index_kind::DEBUG_NAMES
;
5956 dwarf2_per_objfile
->resize_symtabs ();
5960 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
5961 get_gdb_index_contents_from_section
<struct dwarf2_per_bfd
>,
5962 get_gdb_index_contents_from_section
<dwz_file
>))
5964 *index_kind
= dw_index_kind::GDB_INDEX
;
5965 dwarf2_per_objfile
->resize_symtabs ();
5969 /* ... otherwise, try to find the index in the index cache. */
5970 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
5971 get_gdb_index_contents_from_cache
,
5972 get_gdb_index_contents_from_cache_dwz
))
5974 global_index_cache
.hit ();
5975 *index_kind
= dw_index_kind::GDB_INDEX
;
5976 dwarf2_per_objfile
->resize_symtabs ();
5980 global_index_cache
.miss ();
5986 /* Build a partial symbol table. */
5989 dwarf2_build_psymtabs (struct objfile
*objfile
)
5991 struct dwarf2_per_objfile
*dwarf2_per_objfile
5992 = get_dwarf2_per_objfile (objfile
);
5994 init_psymbol_list (objfile
, 1024);
5998 /* This isn't really ideal: all the data we allocate on the
5999 objfile's obstack is still uselessly kept around. However,
6000 freeing it seems unsafe. */
6001 psymtab_discarder
psymtabs (objfile
);
6002 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
6005 dwarf2_per_objfile
->resize_symtabs ();
6007 /* (maybe) store an index in the cache. */
6008 global_index_cache
.store (dwarf2_per_objfile
);
6010 catch (const gdb_exception_error
&except
)
6012 exception_print (gdb_stderr
, except
);
6016 /* Find the base address of the compilation unit for range lists and
6017 location lists. It will normally be specified by DW_AT_low_pc.
6018 In DWARF-3 draft 4, the base address could be overridden by
6019 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6020 compilation units with discontinuous ranges. */
6023 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6025 struct attribute
*attr
;
6027 cu
->base_address
.reset ();
6029 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6030 if (attr
!= nullptr)
6031 cu
->base_address
= attr
->value_as_address ();
6034 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6035 if (attr
!= nullptr)
6036 cu
->base_address
= attr
->value_as_address ();
6040 /* Helper function that returns the proper abbrev section for
6043 static struct dwarf2_section_info
*
6044 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6046 struct dwarf2_section_info
*abbrev
;
6047 dwarf2_per_bfd
*per_bfd
= this_cu
->per_bfd
;
6049 if (this_cu
->is_dwz
)
6050 abbrev
= &dwarf2_get_dwz_file (per_bfd
)->abbrev
;
6052 abbrev
= &per_bfd
->abbrev
;
6057 /* Fetch the abbreviation table offset from a comp or type unit header. */
6060 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6061 struct dwarf2_section_info
*section
,
6062 sect_offset sect_off
)
6064 bfd
*abfd
= section
->get_bfd_owner ();
6065 const gdb_byte
*info_ptr
;
6066 unsigned int initial_length_size
, offset_size
;
6069 section
->read (dwarf2_per_objfile
->objfile
);
6070 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6071 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6072 offset_size
= initial_length_size
== 4 ? 4 : 8;
6073 info_ptr
+= initial_length_size
;
6075 version
= read_2_bytes (abfd
, info_ptr
);
6079 /* Skip unit type and address size. */
6083 return (sect_offset
) read_offset (abfd
, info_ptr
, offset_size
);
6086 /* A partial symtab that is used only for include files. */
6087 struct dwarf2_include_psymtab
: public partial_symtab
6089 dwarf2_include_psymtab (const char *filename
, struct objfile
*objfile
)
6090 : partial_symtab (filename
, objfile
)
6094 void read_symtab (struct objfile
*objfile
) override
6096 /* It's an include file, no symbols to read for it.
6097 Everything is in the includer symtab. */
6099 /* The expansion of a dwarf2_include_psymtab is just a trigger for
6100 expansion of the includer psymtab. We use the dependencies[0] field to
6101 model the includer. But if we go the regular route of calling
6102 expand_psymtab here, and having expand_psymtab call expand_dependencies
6103 to expand the includer, we'll only use expand_psymtab on the includer
6104 (making it a non-toplevel psymtab), while if we expand the includer via
6105 another path, we'll use read_symtab (making it a toplevel psymtab).
6106 So, don't pretend a dwarf2_include_psymtab is an actual toplevel
6107 psymtab, and trigger read_symtab on the includer here directly. */
6108 includer ()->read_symtab (objfile
);
6111 void expand_psymtab (struct objfile
*objfile
) override
6113 /* This is not called by read_symtab, and should not be called by any
6114 expand_dependencies. */
6118 bool readin_p (struct objfile
*objfile
) const override
6120 return includer ()->readin_p (objfile
);
6123 compunit_symtab
*get_compunit_symtab (struct objfile
*objfile
) const override
6129 partial_symtab
*includer () const
6131 /* An include psymtab has exactly one dependency: the psymtab that
6133 gdb_assert (this->number_of_dependencies
== 1);
6134 return this->dependencies
[0];
6138 /* Allocate a new partial symtab for file named NAME and mark this new
6139 partial symtab as being an include of PST. */
6142 dwarf2_create_include_psymtab (const char *name
, dwarf2_psymtab
*pst
,
6143 struct objfile
*objfile
)
6145 dwarf2_include_psymtab
*subpst
= new dwarf2_include_psymtab (name
, objfile
);
6147 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6148 subpst
->dirname
= pst
->dirname
;
6150 subpst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (1);
6151 subpst
->dependencies
[0] = pst
;
6152 subpst
->number_of_dependencies
= 1;
6155 /* Read the Line Number Program data and extract the list of files
6156 included by the source file represented by PST. Build an include
6157 partial symtab for each of these included files. */
6160 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6161 struct die_info
*die
,
6162 dwarf2_psymtab
*pst
)
6165 struct attribute
*attr
;
6167 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6168 if (attr
!= nullptr)
6169 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6171 return; /* No linetable, so no includes. */
6173 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6174 that we pass in the raw text_low here; that is ok because we're
6175 only decoding the line table to make include partial symtabs, and
6176 so the addresses aren't really used. */
6177 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6178 pst
->raw_text_low (), 1);
6182 hash_signatured_type (const void *item
)
6184 const struct signatured_type
*sig_type
6185 = (const struct signatured_type
*) item
;
6187 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6188 return sig_type
->signature
;
6192 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6194 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6195 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6197 return lhs
->signature
== rhs
->signature
;
6200 /* Allocate a hash table for signatured types. */
6203 allocate_signatured_type_table ()
6205 return htab_up (htab_create_alloc (41,
6206 hash_signatured_type
,
6208 NULL
, xcalloc
, xfree
));
6211 /* A helper function to add a signatured type CU to a table. */
6214 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6216 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6217 std::vector
<signatured_type
*> *all_type_units
6218 = (std::vector
<signatured_type
*> *) datum
;
6220 all_type_units
->push_back (sigt
);
6225 /* A helper for create_debug_types_hash_table. Read types from SECTION
6226 and fill them into TYPES_HTAB. It will process only type units,
6227 therefore DW_UT_type. */
6230 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6231 struct dwo_file
*dwo_file
,
6232 dwarf2_section_info
*section
, htab_up
&types_htab
,
6233 rcuh_kind section_kind
)
6235 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6236 struct dwarf2_section_info
*abbrev_section
;
6238 const gdb_byte
*info_ptr
, *end_ptr
;
6240 abbrev_section
= (dwo_file
!= NULL
6241 ? &dwo_file
->sections
.abbrev
6242 : &dwarf2_per_objfile
->per_bfd
->abbrev
);
6244 if (dwarf_read_debug
)
6245 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6246 section
->get_name (),
6247 abbrev_section
->get_file_name ());
6249 section
->read (objfile
);
6250 info_ptr
= section
->buffer
;
6252 if (info_ptr
== NULL
)
6255 /* We can't set abfd until now because the section may be empty or
6256 not present, in which case the bfd is unknown. */
6257 abfd
= section
->get_bfd_owner ();
6259 /* We don't use cutu_reader here because we don't need to read
6260 any dies: the signature is in the header. */
6262 end_ptr
= info_ptr
+ section
->size
;
6263 while (info_ptr
< end_ptr
)
6265 struct signatured_type
*sig_type
;
6266 struct dwo_unit
*dwo_tu
;
6268 const gdb_byte
*ptr
= info_ptr
;
6269 struct comp_unit_head header
;
6270 unsigned int length
;
6272 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6274 /* Initialize it due to a false compiler warning. */
6275 header
.signature
= -1;
6276 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6278 /* We need to read the type's signature in order to build the hash
6279 table, but we don't need anything else just yet. */
6281 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6282 abbrev_section
, ptr
, section_kind
);
6284 length
= header
.get_length ();
6286 /* Skip dummy type units. */
6287 if (ptr
>= info_ptr
+ length
6288 || peek_abbrev_code (abfd
, ptr
) == 0
6289 || header
.unit_type
!= DW_UT_type
)
6295 if (types_htab
== NULL
)
6298 types_htab
= allocate_dwo_unit_table ();
6300 types_htab
= allocate_signatured_type_table ();
6306 dwo_tu
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
6308 dwo_tu
->dwo_file
= dwo_file
;
6309 dwo_tu
->signature
= header
.signature
;
6310 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6311 dwo_tu
->section
= section
;
6312 dwo_tu
->sect_off
= sect_off
;
6313 dwo_tu
->length
= length
;
6317 /* N.B.: type_offset is not usable if this type uses a DWO file.
6318 The real type_offset is in the DWO file. */
6320 sig_type
= dwarf2_per_objfile
->per_bfd
->allocate_signatured_type ();
6321 sig_type
->signature
= header
.signature
;
6322 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6323 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6324 sig_type
->per_cu
.is_debug_types
= 1;
6325 sig_type
->per_cu
.section
= section
;
6326 sig_type
->per_cu
.sect_off
= sect_off
;
6327 sig_type
->per_cu
.length
= length
;
6330 slot
= htab_find_slot (types_htab
.get (),
6331 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6333 gdb_assert (slot
!= NULL
);
6336 sect_offset dup_sect_off
;
6340 const struct dwo_unit
*dup_tu
6341 = (const struct dwo_unit
*) *slot
;
6343 dup_sect_off
= dup_tu
->sect_off
;
6347 const struct signatured_type
*dup_tu
6348 = (const struct signatured_type
*) *slot
;
6350 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6353 complaint (_("debug type entry at offset %s is duplicate to"
6354 " the entry at offset %s, signature %s"),
6355 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6356 hex_string (header
.signature
));
6358 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6360 if (dwarf_read_debug
> 1)
6361 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6362 sect_offset_str (sect_off
),
6363 hex_string (header
.signature
));
6369 /* Create the hash table of all entries in the .debug_types
6370 (or .debug_types.dwo) section(s).
6371 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6372 otherwise it is NULL.
6374 The result is a pointer to the hash table or NULL if there are no types.
6376 Note: This function processes DWO files only, not DWP files. */
6379 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6380 struct dwo_file
*dwo_file
,
6381 gdb::array_view
<dwarf2_section_info
> type_sections
,
6382 htab_up
&types_htab
)
6384 for (dwarf2_section_info
§ion
: type_sections
)
6385 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, §ion
,
6386 types_htab
, rcuh_kind::TYPE
);
6389 /* Create the hash table of all entries in the .debug_types section,
6390 and initialize all_type_units.
6391 The result is zero if there is an error (e.g. missing .debug_types section),
6392 otherwise non-zero. */
6395 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6399 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6400 &dwarf2_per_objfile
->per_bfd
->info
, types_htab
,
6401 rcuh_kind::COMPILE
);
6402 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6403 dwarf2_per_objfile
->per_bfd
->types
, types_htab
);
6404 if (types_htab
== NULL
)
6406 dwarf2_per_objfile
->per_bfd
->signatured_types
= NULL
;
6410 dwarf2_per_objfile
->per_bfd
->signatured_types
= std::move (types_htab
);
6412 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_type_units
.empty ());
6413 dwarf2_per_objfile
->per_bfd
->all_type_units
.reserve
6414 (htab_elements (dwarf2_per_objfile
->per_bfd
->signatured_types
.get ()));
6416 htab_traverse_noresize (dwarf2_per_objfile
->per_bfd
->signatured_types
.get (),
6417 add_signatured_type_cu_to_table
,
6418 &dwarf2_per_objfile
->per_bfd
->all_type_units
);
6423 /* Add an entry for signature SIG to dwarf2_per_objfile->per_bfd->signatured_types.
6424 If SLOT is non-NULL, it is the entry to use in the hash table.
6425 Otherwise we find one. */
6427 static struct signatured_type
*
6428 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6431 if (dwarf2_per_objfile
->per_bfd
->all_type_units
.size ()
6432 == dwarf2_per_objfile
->per_bfd
->all_type_units
.capacity ())
6433 ++dwarf2_per_objfile
->per_bfd
->tu_stats
.nr_all_type_units_reallocs
;
6435 signatured_type
*sig_type
= dwarf2_per_objfile
->per_bfd
->allocate_signatured_type ();
6437 dwarf2_per_objfile
->resize_symtabs ();
6439 dwarf2_per_objfile
->per_bfd
->all_type_units
.push_back (sig_type
);
6440 sig_type
->signature
= sig
;
6441 sig_type
->per_cu
.is_debug_types
= 1;
6442 if (dwarf2_per_objfile
->per_bfd
->using_index
)
6444 sig_type
->per_cu
.v
.quick
=
6445 OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
6446 struct dwarf2_per_cu_quick_data
);
6451 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->signatured_types
.get (),
6454 gdb_assert (*slot
== NULL
);
6456 /* The rest of sig_type must be filled in by the caller. */
6460 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6461 Fill in SIG_ENTRY with DWO_ENTRY. */
6464 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6465 struct signatured_type
*sig_entry
,
6466 struct dwo_unit
*dwo_entry
)
6468 dwarf2_per_bfd
*per_bfd
= dwarf2_per_objfile
->per_bfd
;
6470 /* Make sure we're not clobbering something we don't expect to. */
6471 gdb_assert (! sig_entry
->per_cu
.queued
);
6472 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6473 if (per_bfd
->using_index
)
6475 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6476 gdb_assert (!dwarf2_per_objfile
->symtab_set_p (&sig_entry
->per_cu
));
6479 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6480 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6481 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6482 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6483 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6485 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6486 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6487 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6488 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6489 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6490 sig_entry
->per_cu
.per_bfd
= per_bfd
;
6491 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6492 sig_entry
->dwo_unit
= dwo_entry
;
6495 /* Subroutine of lookup_signatured_type.
6496 If we haven't read the TU yet, create the signatured_type data structure
6497 for a TU to be read in directly from a DWO file, bypassing the stub.
6498 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6499 using .gdb_index, then when reading a CU we want to stay in the DWO file
6500 containing that CU. Otherwise we could end up reading several other DWO
6501 files (due to comdat folding) to process the transitive closure of all the
6502 mentioned TUs, and that can be slow. The current DWO file will have every
6503 type signature that it needs.
6504 We only do this for .gdb_index because in the psymtab case we already have
6505 to read all the DWOs to build the type unit groups. */
6507 static struct signatured_type
*
6508 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6510 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
6511 struct dwo_file
*dwo_file
;
6512 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6513 struct signatured_type find_sig_entry
, *sig_entry
;
6516 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->per_bfd
->using_index
);
6518 /* If TU skeletons have been removed then we may not have read in any
6520 if (dwarf2_per_objfile
->per_bfd
->signatured_types
== NULL
)
6521 dwarf2_per_objfile
->per_bfd
->signatured_types
= allocate_signatured_type_table ();
6523 /* We only ever need to read in one copy of a signatured type.
6524 Use the global signatured_types array to do our own comdat-folding
6525 of types. If this is the first time we're reading this TU, and
6526 the TU has an entry in .gdb_index, replace the recorded data from
6527 .gdb_index with this TU. */
6529 find_sig_entry
.signature
= sig
;
6530 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->signatured_types
.get (),
6531 &find_sig_entry
, INSERT
);
6532 sig_entry
= (struct signatured_type
*) *slot
;
6534 /* We can get here with the TU already read, *or* in the process of being
6535 read. Don't reassign the global entry to point to this DWO if that's
6536 the case. Also note that if the TU is already being read, it may not
6537 have come from a DWO, the program may be a mix of Fission-compiled
6538 code and non-Fission-compiled code. */
6540 /* Have we already tried to read this TU?
6541 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6542 needn't exist in the global table yet). */
6543 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6546 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6547 dwo_unit of the TU itself. */
6548 dwo_file
= cu
->dwo_unit
->dwo_file
;
6550 /* Ok, this is the first time we're reading this TU. */
6551 if (dwo_file
->tus
== NULL
)
6553 find_dwo_entry
.signature
= sig
;
6554 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
6556 if (dwo_entry
== NULL
)
6559 /* If the global table doesn't have an entry for this TU, add one. */
6560 if (sig_entry
== NULL
)
6561 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6563 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6564 sig_entry
->per_cu
.tu_read
= 1;
6568 /* Subroutine of lookup_signatured_type.
6569 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6570 then try the DWP file. If the TU stub (skeleton) has been removed then
6571 it won't be in .gdb_index. */
6573 static struct signatured_type
*
6574 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6576 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
6577 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
6578 struct dwo_unit
*dwo_entry
;
6579 struct signatured_type find_sig_entry
, *sig_entry
;
6582 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->per_bfd
->using_index
);
6583 gdb_assert (dwp_file
!= NULL
);
6585 /* If TU skeletons have been removed then we may not have read in any
6587 if (dwarf2_per_objfile
->per_bfd
->signatured_types
== NULL
)
6588 dwarf2_per_objfile
->per_bfd
->signatured_types
= allocate_signatured_type_table ();
6590 find_sig_entry
.signature
= sig
;
6591 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->signatured_types
.get (),
6592 &find_sig_entry
, INSERT
);
6593 sig_entry
= (struct signatured_type
*) *slot
;
6595 /* Have we already tried to read this TU?
6596 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6597 needn't exist in the global table yet). */
6598 if (sig_entry
!= NULL
)
6601 if (dwp_file
->tus
== NULL
)
6603 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
6604 sig
, 1 /* is_debug_types */);
6605 if (dwo_entry
== NULL
)
6608 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6609 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6614 /* Lookup a signature based type for DW_FORM_ref_sig8.
6615 Returns NULL if signature SIG is not present in the table.
6616 It is up to the caller to complain about this. */
6618 static struct signatured_type
*
6619 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6621 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
6624 && dwarf2_per_objfile
->per_bfd
->using_index
)
6626 /* We're in a DWO/DWP file, and we're using .gdb_index.
6627 These cases require special processing. */
6628 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
6629 return lookup_dwo_signatured_type (cu
, sig
);
6631 return lookup_dwp_signatured_type (cu
, sig
);
6635 struct signatured_type find_entry
, *entry
;
6637 if (dwarf2_per_objfile
->per_bfd
->signatured_types
== NULL
)
6639 find_entry
.signature
= sig
;
6640 entry
= ((struct signatured_type
*)
6641 htab_find (dwarf2_per_objfile
->per_bfd
->signatured_types
.get (),
6647 /* Low level DIE reading support. */
6649 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
6652 init_cu_die_reader (struct die_reader_specs
*reader
,
6653 struct dwarf2_cu
*cu
,
6654 struct dwarf2_section_info
*section
,
6655 struct dwo_file
*dwo_file
,
6656 struct abbrev_table
*abbrev_table
)
6658 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
6659 reader
->abfd
= section
->get_bfd_owner ();
6661 reader
->dwo_file
= dwo_file
;
6662 reader
->die_section
= section
;
6663 reader
->buffer
= section
->buffer
;
6664 reader
->buffer_end
= section
->buffer
+ section
->size
;
6665 reader
->abbrev_table
= abbrev_table
;
6668 /* Subroutine of cutu_reader to simplify it.
6669 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
6670 There's just a lot of work to do, and cutu_reader is big enough
6673 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
6674 from it to the DIE in the DWO. If NULL we are skipping the stub.
6675 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
6676 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
6677 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
6678 STUB_COMP_DIR may be non-NULL.
6679 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE
6680 are filled in with the info of the DIE from the DWO file.
6681 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
6682 from the dwo. Since *RESULT_READER references this abbrev table, it must be
6683 kept around for at least as long as *RESULT_READER.
6685 The result is non-zero if a valid (non-dummy) DIE was found. */
6688 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
6689 struct dwo_unit
*dwo_unit
,
6690 struct die_info
*stub_comp_unit_die
,
6691 const char *stub_comp_dir
,
6692 struct die_reader_specs
*result_reader
,
6693 const gdb_byte
**result_info_ptr
,
6694 struct die_info
**result_comp_unit_die
,
6695 abbrev_table_up
*result_dwo_abbrev_table
)
6697 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6698 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6699 struct dwarf2_cu
*cu
= this_cu
->cu
;
6701 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6702 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
6703 int i
,num_extra_attrs
;
6704 struct dwarf2_section_info
*dwo_abbrev_section
;
6705 struct die_info
*comp_unit_die
;
6707 /* At most one of these may be provided. */
6708 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
6710 /* These attributes aren't processed until later:
6711 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
6712 DW_AT_comp_dir is used now, to find the DWO file, but it is also
6713 referenced later. However, these attributes are found in the stub
6714 which we won't have later. In order to not impose this complication
6715 on the rest of the code, we read them here and copy them to the
6724 if (stub_comp_unit_die
!= NULL
)
6726 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
6728 if (! this_cu
->is_debug_types
)
6729 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
6730 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
6731 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
6732 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
6733 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
6735 cu
->addr_base
= stub_comp_unit_die
->addr_base ();
6737 /* There should be a DW_AT_rnglists_base (DW_AT_GNU_ranges_base) attribute
6738 here (if needed). We need the value before we can process
6740 cu
->ranges_base
= stub_comp_unit_die
->ranges_base ();
6742 else if (stub_comp_dir
!= NULL
)
6744 /* Reconstruct the comp_dir attribute to simplify the code below. */
6745 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
6746 comp_dir
->name
= DW_AT_comp_dir
;
6747 comp_dir
->form
= DW_FORM_string
;
6748 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
6749 DW_STRING (comp_dir
) = stub_comp_dir
;
6752 /* Set up for reading the DWO CU/TU. */
6753 cu
->dwo_unit
= dwo_unit
;
6754 dwarf2_section_info
*section
= dwo_unit
->section
;
6755 section
->read (objfile
);
6756 abfd
= section
->get_bfd_owner ();
6757 begin_info_ptr
= info_ptr
= (section
->buffer
6758 + to_underlying (dwo_unit
->sect_off
));
6759 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
6761 if (this_cu
->is_debug_types
)
6763 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
6765 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6766 &cu
->header
, section
,
6768 info_ptr
, rcuh_kind::TYPE
);
6769 /* This is not an assert because it can be caused by bad debug info. */
6770 if (sig_type
->signature
!= cu
->header
.signature
)
6772 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
6773 " TU at offset %s [in module %s]"),
6774 hex_string (sig_type
->signature
),
6775 hex_string (cu
->header
.signature
),
6776 sect_offset_str (dwo_unit
->sect_off
),
6777 bfd_get_filename (abfd
));
6779 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6780 /* For DWOs coming from DWP files, we don't know the CU length
6781 nor the type's offset in the TU until now. */
6782 dwo_unit
->length
= cu
->header
.get_length ();
6783 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
6785 /* Establish the type offset that can be used to lookup the type.
6786 For DWO files, we don't know it until now. */
6787 sig_type
->type_offset_in_section
6788 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
6792 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
6793 &cu
->header
, section
,
6795 info_ptr
, rcuh_kind::COMPILE
);
6796 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6797 /* For DWOs coming from DWP files, we don't know the CU length
6799 dwo_unit
->length
= cu
->header
.get_length ();
6802 *result_dwo_abbrev_table
6803 = abbrev_table::read (objfile
, dwo_abbrev_section
,
6804 cu
->header
.abbrev_sect_off
);
6805 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
6806 result_dwo_abbrev_table
->get ());
6808 /* Read in the die, but leave space to copy over the attributes
6809 from the stub. This has the benefit of simplifying the rest of
6810 the code - all the work to maintain the illusion of a single
6811 DW_TAG_{compile,type}_unit DIE is done here. */
6812 num_extra_attrs
= ((stmt_list
!= NULL
)
6816 + (comp_dir
!= NULL
));
6817 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
6820 /* Copy over the attributes from the stub to the DIE we just read in. */
6821 comp_unit_die
= *result_comp_unit_die
;
6822 i
= comp_unit_die
->num_attrs
;
6823 if (stmt_list
!= NULL
)
6824 comp_unit_die
->attrs
[i
++] = *stmt_list
;
6826 comp_unit_die
->attrs
[i
++] = *low_pc
;
6827 if (high_pc
!= NULL
)
6828 comp_unit_die
->attrs
[i
++] = *high_pc
;
6830 comp_unit_die
->attrs
[i
++] = *ranges
;
6831 if (comp_dir
!= NULL
)
6832 comp_unit_die
->attrs
[i
++] = *comp_dir
;
6833 comp_unit_die
->num_attrs
+= num_extra_attrs
;
6835 if (dwarf_die_debug
)
6837 fprintf_unfiltered (gdb_stdlog
,
6838 "Read die from %s@0x%x of %s:\n",
6839 section
->get_name (),
6840 (unsigned) (begin_info_ptr
- section
->buffer
),
6841 bfd_get_filename (abfd
));
6842 dump_die (comp_unit_die
, dwarf_die_debug
);
6845 /* Skip dummy compilation units. */
6846 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
6847 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6850 *result_info_ptr
= info_ptr
;
6854 /* Return the signature of the compile unit, if found. In DWARF 4 and before,
6855 the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the
6856 signature is part of the header. */
6857 static gdb::optional
<ULONGEST
>
6858 lookup_dwo_id (struct dwarf2_cu
*cu
, struct die_info
* comp_unit_die
)
6860 if (cu
->header
.version
>= 5)
6861 return cu
->header
.signature
;
6862 struct attribute
*attr
;
6863 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
6864 if (attr
== nullptr)
6865 return gdb::optional
<ULONGEST
> ();
6866 return DW_UNSND (attr
);
6869 /* Subroutine of cutu_reader to simplify it.
6870 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
6871 Returns NULL if the specified DWO unit cannot be found. */
6873 static struct dwo_unit
*
6874 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
6875 struct die_info
*comp_unit_die
,
6876 const char *dwo_name
)
6878 struct dwarf2_cu
*cu
= this_cu
->cu
;
6879 struct dwo_unit
*dwo_unit
;
6880 const char *comp_dir
;
6882 gdb_assert (cu
!= NULL
);
6884 /* Yeah, we look dwo_name up again, but it simplifies the code. */
6885 dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
6886 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
6888 if (this_cu
->is_debug_types
)
6890 struct signatured_type
*sig_type
;
6892 /* Since this_cu is the first member of struct signatured_type,
6893 we can go from a pointer to one to a pointer to the other. */
6894 sig_type
= (struct signatured_type
*) this_cu
;
6895 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
6899 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
6900 if (!signature
.has_value ())
6901 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
6903 dwo_name
, bfd_get_filename (this_cu
->per_bfd
->obfd
));
6904 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
6911 /* Subroutine of cutu_reader to simplify it.
6912 See it for a description of the parameters.
6913 Read a TU directly from a DWO file, bypassing the stub. */
6916 cutu_reader::init_tu_and_read_dwo_dies (dwarf2_per_cu_data
*this_cu
,
6917 dwarf2_per_objfile
*per_objfile
,
6918 int use_existing_cu
)
6920 struct signatured_type
*sig_type
;
6922 /* Verify we can do the following downcast, and that we have the
6924 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
6925 sig_type
= (struct signatured_type
*) this_cu
;
6926 gdb_assert (sig_type
->dwo_unit
!= NULL
);
6928 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
6930 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
6931 /* There's no need to do the rereading_dwo_cu handling that
6932 cutu_reader does since we don't read the stub. */
6936 /* If !use_existing_cu, this_cu->cu must be NULL. */
6937 gdb_assert (this_cu
->cu
== NULL
);
6938 m_new_cu
.reset (new dwarf2_cu (this_cu
, per_objfile
));
6941 /* A future optimization, if needed, would be to use an existing
6942 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
6943 could share abbrev tables. */
6945 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
6946 NULL
/* stub_comp_unit_die */,
6947 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
6950 &m_dwo_abbrev_table
) == 0)
6957 /* Initialize a CU (or TU) and read its DIEs.
6958 If the CU defers to a DWO file, read the DWO file as well.
6960 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
6961 Otherwise the table specified in the comp unit header is read in and used.
6962 This is an optimization for when we already have the abbrev table.
6964 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
6965 Otherwise, a new CU is allocated with xmalloc. */
6967 cutu_reader::cutu_reader (dwarf2_per_cu_data
*this_cu
,
6968 dwarf2_per_objfile
*dwarf2_per_objfile
,
6969 struct abbrev_table
*abbrev_table
,
6970 int use_existing_cu
,
6972 : die_reader_specs
{},
6975 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6976 struct dwarf2_section_info
*section
= this_cu
->section
;
6977 bfd
*abfd
= section
->get_bfd_owner ();
6978 struct dwarf2_cu
*cu
;
6979 const gdb_byte
*begin_info_ptr
;
6980 struct signatured_type
*sig_type
= NULL
;
6981 struct dwarf2_section_info
*abbrev_section
;
6982 /* Non-zero if CU currently points to a DWO file and we need to
6983 reread it. When this happens we need to reread the skeleton die
6984 before we can reread the DWO file (this only applies to CUs, not TUs). */
6985 int rereading_dwo_cu
= 0;
6987 if (dwarf_die_debug
)
6988 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
6989 this_cu
->is_debug_types
? "type" : "comp",
6990 sect_offset_str (this_cu
->sect_off
));
6992 /* If we're reading a TU directly from a DWO file, including a virtual DWO
6993 file (instead of going through the stub), short-circuit all of this. */
6994 if (this_cu
->reading_dwo_directly
)
6996 /* Narrow down the scope of possibilities to have to understand. */
6997 gdb_assert (this_cu
->is_debug_types
);
6998 gdb_assert (abbrev_table
== NULL
);
6999 init_tu_and_read_dwo_dies (this_cu
, dwarf2_per_objfile
, use_existing_cu
);
7003 /* This is cheap if the section is already read in. */
7004 section
->read (objfile
);
7006 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7008 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
7010 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7013 /* If this CU is from a DWO file we need to start over, we need to
7014 refetch the attributes from the skeleton CU.
7015 This could be optimized by retrieving those attributes from when we
7016 were here the first time: the previous comp_unit_die was stored in
7017 comp_unit_obstack. But there's no data yet that we need this
7019 if (cu
->dwo_unit
!= NULL
)
7020 rereading_dwo_cu
= 1;
7024 /* If !use_existing_cu, this_cu->cu must be NULL. */
7025 gdb_assert (this_cu
->cu
== NULL
);
7026 m_new_cu
.reset (new dwarf2_cu (this_cu
, dwarf2_per_objfile
));
7027 cu
= m_new_cu
.get ();
7030 /* Get the header. */
7031 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7033 /* We already have the header, there's no need to read it in again. */
7034 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7038 if (this_cu
->is_debug_types
)
7040 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7041 &cu
->header
, section
,
7042 abbrev_section
, info_ptr
,
7045 /* Since per_cu is the first member of struct signatured_type,
7046 we can go from a pointer to one to a pointer to the other. */
7047 sig_type
= (struct signatured_type
*) this_cu
;
7048 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7049 gdb_assert (sig_type
->type_offset_in_tu
7050 == cu
->header
.type_cu_offset_in_tu
);
7051 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7053 /* LENGTH has not been set yet for type units if we're
7054 using .gdb_index. */
7055 this_cu
->length
= cu
->header
.get_length ();
7057 /* Establish the type offset that can be used to lookup the type. */
7058 sig_type
->type_offset_in_section
=
7059 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7061 this_cu
->dwarf_version
= cu
->header
.version
;
7065 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7066 &cu
->header
, section
,
7069 rcuh_kind::COMPILE
);
7071 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7072 if (this_cu
->length
== 0)
7073 this_cu
->length
= cu
->header
.get_length ();
7075 gdb_assert (this_cu
->length
== cu
->header
.get_length ());
7076 this_cu
->dwarf_version
= cu
->header
.version
;
7080 /* Skip dummy compilation units. */
7081 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7082 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7088 /* If we don't have them yet, read the abbrevs for this compilation unit.
7089 And if we need to read them now, make sure they're freed when we're
7091 if (abbrev_table
!= NULL
)
7092 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7095 m_abbrev_table_holder
7096 = abbrev_table::read (objfile
, abbrev_section
,
7097 cu
->header
.abbrev_sect_off
);
7098 abbrev_table
= m_abbrev_table_holder
.get ();
7101 /* Read the top level CU/TU die. */
7102 init_cu_die_reader (this, cu
, section
, NULL
, abbrev_table
);
7103 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7105 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
7111 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7112 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7113 table from the DWO file and pass the ownership over to us. It will be
7114 referenced from READER, so we must make sure to free it after we're done
7117 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7118 DWO CU, that this test will fail (the attribute will not be present). */
7119 const char *dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
7120 if (dwo_name
!= nullptr)
7122 struct dwo_unit
*dwo_unit
;
7123 struct die_info
*dwo_comp_unit_die
;
7125 if (comp_unit_die
->has_children
)
7127 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
7128 " has children (offset %s) [in module %s]"),
7129 sect_offset_str (this_cu
->sect_off
),
7130 bfd_get_filename (abfd
));
7132 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
, dwo_name
);
7133 if (dwo_unit
!= NULL
)
7135 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
7136 comp_unit_die
, NULL
,
7139 &m_dwo_abbrev_table
) == 0)
7145 comp_unit_die
= dwo_comp_unit_die
;
7149 /* Yikes, we couldn't find the rest of the DIE, we only have
7150 the stub. A complaint has already been logged. There's
7151 not much more we can do except pass on the stub DIE to
7152 die_reader_func. We don't want to throw an error on bad
7159 cutu_reader::keep ()
7161 /* Done, clean up. */
7162 gdb_assert (!dummy_p
);
7163 if (m_new_cu
!= NULL
)
7165 struct dwarf2_per_objfile
*dwarf2_per_objfile
7166 = m_this_cu
->dwarf2_per_objfile
;
7167 /* Link this CU into read_in_chain. */
7168 m_this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->per_bfd
->read_in_chain
;
7169 dwarf2_per_objfile
->per_bfd
->read_in_chain
= m_this_cu
;
7170 /* The chain owns it now. */
7171 m_new_cu
.release ();
7175 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name (DW_AT_dwo_name)
7176 if present. DWO_FILE, if non-NULL, is the DWO file to read (the caller is
7177 assumed to have already done the lookup to find the DWO file).
7179 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7180 THIS_CU->is_debug_types, but nothing else.
7182 We fill in THIS_CU->length.
7184 THIS_CU->cu is always freed when done.
7185 This is done in order to not leave THIS_CU->cu in a state where we have
7186 to care whether it refers to the "main" CU or the DWO CU.
7188 When parent_cu is passed, it is used to provide a default value for
7189 str_offsets_base and addr_base from the parent. */
7191 cutu_reader::cutu_reader (dwarf2_per_cu_data
*this_cu
,
7192 dwarf2_per_objfile
*dwarf2_per_objfile
,
7193 struct dwarf2_cu
*parent_cu
,
7194 struct dwo_file
*dwo_file
)
7195 : die_reader_specs
{},
7198 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7199 struct dwarf2_section_info
*section
= this_cu
->section
;
7200 bfd
*abfd
= section
->get_bfd_owner ();
7201 struct dwarf2_section_info
*abbrev_section
;
7202 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7204 if (dwarf_die_debug
)
7205 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7206 this_cu
->is_debug_types
? "type" : "comp",
7207 sect_offset_str (this_cu
->sect_off
));
7209 gdb_assert (this_cu
->cu
== NULL
);
7211 abbrev_section
= (dwo_file
!= NULL
7212 ? &dwo_file
->sections
.abbrev
7213 : get_abbrev_section_for_cu (this_cu
));
7215 /* This is cheap if the section is already read in. */
7216 section
->read (objfile
);
7218 m_new_cu
.reset (new dwarf2_cu (this_cu
, dwarf2_per_objfile
));
7220 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7221 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7222 &m_new_cu
->header
, section
,
7223 abbrev_section
, info_ptr
,
7224 (this_cu
->is_debug_types
7226 : rcuh_kind::COMPILE
));
7228 if (parent_cu
!= nullptr)
7230 m_new_cu
->str_offsets_base
= parent_cu
->str_offsets_base
;
7231 m_new_cu
->addr_base
= parent_cu
->addr_base
;
7233 this_cu
->length
= m_new_cu
->header
.get_length ();
7235 /* Skip dummy compilation units. */
7236 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7237 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7243 m_abbrev_table_holder
7244 = abbrev_table::read (objfile
, abbrev_section
,
7245 m_new_cu
->header
.abbrev_sect_off
);
7247 init_cu_die_reader (this, m_new_cu
.get (), section
, dwo_file
,
7248 m_abbrev_table_holder
.get ());
7249 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7253 /* Type Unit Groups.
7255 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7256 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7257 so that all types coming from the same compilation (.o file) are grouped
7258 together. A future step could be to put the types in the same symtab as
7259 the CU the types ultimately came from. */
7262 hash_type_unit_group (const void *item
)
7264 const struct type_unit_group
*tu_group
7265 = (const struct type_unit_group
*) item
;
7267 return hash_stmt_list_entry (&tu_group
->hash
);
7271 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7273 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7274 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7276 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7279 /* Allocate a hash table for type unit groups. */
7282 allocate_type_unit_groups_table ()
7284 return htab_up (htab_create_alloc (3,
7285 hash_type_unit_group
,
7287 NULL
, xcalloc
, xfree
));
7290 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7291 partial symtabs. We combine several TUs per psymtab to not let the size
7292 of any one psymtab grow too big. */
7293 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7294 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7296 /* Helper routine for get_type_unit_group.
7297 Create the type_unit_group object used to hold one or more TUs. */
7299 static struct type_unit_group
*
7300 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7302 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
7303 dwarf2_per_bfd
*per_bfd
= dwarf2_per_objfile
->per_bfd
;
7304 struct dwarf2_per_cu_data
*per_cu
;
7305 struct type_unit_group
*tu_group
;
7307 tu_group
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
7308 struct type_unit_group
);
7309 per_cu
= &tu_group
->per_cu
;
7310 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7311 per_cu
->per_bfd
= per_bfd
;
7313 if (per_bfd
->using_index
)
7315 per_cu
->v
.quick
= OBSTACK_ZALLOC (&per_bfd
->obstack
,
7316 struct dwarf2_per_cu_quick_data
);
7320 unsigned int line_offset
= to_underlying (line_offset_struct
);
7321 dwarf2_psymtab
*pst
;
7324 /* Give the symtab a useful name for debug purposes. */
7325 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7326 name
= string_printf ("<type_units_%d>",
7327 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7329 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7331 pst
= create_partial_symtab (per_cu
, name
.c_str ());
7332 pst
->anonymous
= true;
7335 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7336 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7341 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7342 STMT_LIST is a DW_AT_stmt_list attribute. */
7344 static struct type_unit_group
*
7345 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7347 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
7348 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->per_bfd
->tu_stats
;
7349 struct type_unit_group
*tu_group
;
7351 unsigned int line_offset
;
7352 struct type_unit_group type_unit_group_for_lookup
;
7354 if (dwarf2_per_objfile
->per_bfd
->type_unit_groups
== NULL
)
7355 dwarf2_per_objfile
->per_bfd
->type_unit_groups
= allocate_type_unit_groups_table ();
7357 /* Do we need to create a new group, or can we use an existing one? */
7361 line_offset
= DW_UNSND (stmt_list
);
7362 ++tu_stats
->nr_symtab_sharers
;
7366 /* Ugh, no stmt_list. Rare, but we have to handle it.
7367 We can do various things here like create one group per TU or
7368 spread them over multiple groups to split up the expansion work.
7369 To avoid worst case scenarios (too many groups or too large groups)
7370 we, umm, group them in bunches. */
7371 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7372 | (tu_stats
->nr_stmt_less_type_units
7373 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7374 ++tu_stats
->nr_stmt_less_type_units
;
7377 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7378 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7379 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->type_unit_groups
.get (),
7380 &type_unit_group_for_lookup
, INSERT
);
7383 tu_group
= (struct type_unit_group
*) *slot
;
7384 gdb_assert (tu_group
!= NULL
);
7388 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7389 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7391 ++tu_stats
->nr_symtabs
;
7397 /* Partial symbol tables. */
7399 /* Create a psymtab named NAME and assign it to PER_CU.
7401 The caller must fill in the following details:
7402 dirname, textlow, texthigh. */
7404 static dwarf2_psymtab
*
7405 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7407 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7408 dwarf2_psymtab
*pst
;
7410 pst
= new dwarf2_psymtab (name
, objfile
, per_cu
);
7412 pst
->psymtabs_addrmap_supported
= true;
7414 /* This is the glue that links PST into GDB's symbol API. */
7415 per_cu
->v
.psymtab
= pst
;
7420 /* DIE reader function for process_psymtab_comp_unit. */
7423 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7424 const gdb_byte
*info_ptr
,
7425 struct die_info
*comp_unit_die
,
7426 enum language pretend_language
)
7428 struct dwarf2_cu
*cu
= reader
->cu
;
7429 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
7430 struct gdbarch
*gdbarch
= objfile
->arch ();
7431 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7433 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7434 dwarf2_psymtab
*pst
;
7435 enum pc_bounds_kind cu_bounds_kind
;
7436 const char *filename
;
7438 gdb_assert (! per_cu
->is_debug_types
);
7440 prepare_one_comp_unit (cu
, comp_unit_die
, pretend_language
);
7442 /* Allocate a new partial symbol table structure. */
7443 gdb::unique_xmalloc_ptr
<char> debug_filename
;
7444 static const char artificial
[] = "<artificial>";
7445 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7446 if (filename
== NULL
)
7448 else if (strcmp (filename
, artificial
) == 0)
7450 debug_filename
.reset (concat (artificial
, "@",
7451 sect_offset_str (per_cu
->sect_off
),
7453 filename
= debug_filename
.get ();
7456 pst
= create_partial_symtab (per_cu
, filename
);
7458 /* This must be done before calling dwarf2_build_include_psymtabs. */
7459 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7461 baseaddr
= objfile
->text_section_offset ();
7463 dwarf2_find_base_address (comp_unit_die
, cu
);
7465 /* Possibly set the default values of LOWPC and HIGHPC from
7467 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7468 &best_highpc
, cu
, pst
);
7469 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7472 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
7475 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
7477 /* Store the contiguous range if it is not empty; it can be
7478 empty for CUs with no code. */
7479 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
7483 /* Check if comp unit has_children.
7484 If so, read the rest of the partial symbols from this comp unit.
7485 If not, there's no more debug_info for this comp unit. */
7486 if (comp_unit_die
->has_children
)
7488 struct partial_die_info
*first_die
;
7489 CORE_ADDR lowpc
, highpc
;
7491 lowpc
= ((CORE_ADDR
) -1);
7492 highpc
= ((CORE_ADDR
) 0);
7494 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7496 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7497 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7499 /* If we didn't find a lowpc, set it to highpc to avoid
7500 complaints from `maint check'. */
7501 if (lowpc
== ((CORE_ADDR
) -1))
7504 /* If the compilation unit didn't have an explicit address range,
7505 then use the information extracted from its child dies. */
7506 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7509 best_highpc
= highpc
;
7512 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
7513 best_lowpc
+ baseaddr
)
7515 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
7516 best_highpc
+ baseaddr
)
7519 end_psymtab_common (objfile
, pst
);
7521 if (!cu
->per_cu
->imported_symtabs_empty ())
7524 int len
= cu
->per_cu
->imported_symtabs_size ();
7526 /* Fill in 'dependencies' here; we fill in 'users' in a
7528 pst
->number_of_dependencies
= len
;
7530 = objfile
->partial_symtabs
->allocate_dependencies (len
);
7531 for (i
= 0; i
< len
; ++i
)
7533 pst
->dependencies
[i
]
7534 = cu
->per_cu
->imported_symtabs
->at (i
)->v
.psymtab
;
7537 cu
->per_cu
->imported_symtabs_free ();
7540 /* Get the list of files included in the current compilation unit,
7541 and build a psymtab for each of them. */
7542 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
7544 if (dwarf_read_debug
)
7545 fprintf_unfiltered (gdb_stdlog
,
7546 "Psymtab for %s unit @%s: %s - %s"
7547 ", %d global, %d static syms\n",
7548 per_cu
->is_debug_types
? "type" : "comp",
7549 sect_offset_str (per_cu
->sect_off
),
7550 paddress (gdbarch
, pst
->text_low (objfile
)),
7551 paddress (gdbarch
, pst
->text_high (objfile
)),
7552 pst
->n_global_syms
, pst
->n_static_syms
);
7555 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7556 Process compilation unit THIS_CU for a psymtab. */
7559 process_psymtab_comp_unit (dwarf2_per_cu_data
*this_cu
,
7560 dwarf2_per_objfile
*per_objfile
,
7561 bool want_partial_unit
,
7562 enum language pretend_language
)
7564 /* If this compilation unit was already read in, free the
7565 cached copy in order to read it in again. This is
7566 necessary because we skipped some symbols when we first
7567 read in the compilation unit (see load_partial_dies).
7568 This problem could be avoided, but the benefit is unclear. */
7569 if (this_cu
->cu
!= NULL
)
7570 free_one_cached_comp_unit (this_cu
);
7572 cutu_reader
reader (this_cu
, per_objfile
, NULL
, 0, false);
7574 switch (reader
.comp_unit_die
->tag
)
7576 case DW_TAG_compile_unit
:
7577 this_cu
->unit_type
= DW_UT_compile
;
7579 case DW_TAG_partial_unit
:
7580 this_cu
->unit_type
= DW_UT_partial
;
7590 else if (this_cu
->is_debug_types
)
7591 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7592 reader
.comp_unit_die
);
7593 else if (want_partial_unit
7594 || reader
.comp_unit_die
->tag
!= DW_TAG_partial_unit
)
7595 process_psymtab_comp_unit_reader (&reader
, reader
.info_ptr
,
7596 reader
.comp_unit_die
,
7599 this_cu
->lang
= this_cu
->cu
->language
;
7601 /* Age out any secondary CUs. */
7602 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
7605 /* Reader function for build_type_psymtabs. */
7608 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
7609 const gdb_byte
*info_ptr
,
7610 struct die_info
*type_unit_die
)
7612 struct dwarf2_per_objfile
*dwarf2_per_objfile
= reader
->cu
->per_objfile
;
7613 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7614 struct dwarf2_cu
*cu
= reader
->cu
;
7615 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7616 struct signatured_type
*sig_type
;
7617 struct type_unit_group
*tu_group
;
7618 struct attribute
*attr
;
7619 struct partial_die_info
*first_die
;
7620 CORE_ADDR lowpc
, highpc
;
7621 dwarf2_psymtab
*pst
;
7623 gdb_assert (per_cu
->is_debug_types
);
7624 sig_type
= (struct signatured_type
*) per_cu
;
7626 if (! type_unit_die
->has_children
)
7629 attr
= type_unit_die
->attr (DW_AT_stmt_list
);
7630 tu_group
= get_type_unit_group (cu
, attr
);
7632 if (tu_group
->tus
== nullptr)
7633 tu_group
->tus
= new std::vector
<signatured_type
*>;
7634 tu_group
->tus
->push_back (sig_type
);
7636 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
7637 pst
= create_partial_symtab (per_cu
, "");
7638 pst
->anonymous
= true;
7640 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7642 lowpc
= (CORE_ADDR
) -1;
7643 highpc
= (CORE_ADDR
) 0;
7644 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
7646 end_psymtab_common (objfile
, pst
);
7649 /* Struct used to sort TUs by their abbreviation table offset. */
7651 struct tu_abbrev_offset
7653 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
7654 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
7657 signatured_type
*sig_type
;
7658 sect_offset abbrev_offset
;
7661 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
7664 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
7665 const struct tu_abbrev_offset
&b
)
7667 return a
.abbrev_offset
< b
.abbrev_offset
;
7670 /* Efficiently read all the type units.
7671 This does the bulk of the work for build_type_psymtabs.
7673 The efficiency is because we sort TUs by the abbrev table they use and
7674 only read each abbrev table once. In one program there are 200K TUs
7675 sharing 8K abbrev tables.
7677 The main purpose of this function is to support building the
7678 dwarf2_per_objfile->per_bfd->type_unit_groups table.
7679 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
7680 can collapse the search space by grouping them by stmt_list.
7681 The savings can be significant, in the same program from above the 200K TUs
7682 share 8K stmt_list tables.
7684 FUNC is expected to call get_type_unit_group, which will create the
7685 struct type_unit_group if necessary and add it to
7686 dwarf2_per_objfile->per_bfd->type_unit_groups. */
7689 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7691 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->per_bfd
->tu_stats
;
7692 abbrev_table_up abbrev_table
;
7693 sect_offset abbrev_offset
;
7695 /* It's up to the caller to not call us multiple times. */
7696 gdb_assert (dwarf2_per_objfile
->per_bfd
->type_unit_groups
== NULL
);
7698 if (dwarf2_per_objfile
->per_bfd
->all_type_units
.empty ())
7701 /* TUs typically share abbrev tables, and there can be way more TUs than
7702 abbrev tables. Sort by abbrev table to reduce the number of times we
7703 read each abbrev table in.
7704 Alternatives are to punt or to maintain a cache of abbrev tables.
7705 This is simpler and efficient enough for now.
7707 Later we group TUs by their DW_AT_stmt_list value (as this defines the
7708 symtab to use). Typically TUs with the same abbrev offset have the same
7709 stmt_list value too so in practice this should work well.
7711 The basic algorithm here is:
7713 sort TUs by abbrev table
7714 for each TU with same abbrev table:
7715 read abbrev table if first user
7716 read TU top level DIE
7717 [IWBN if DWO skeletons had DW_AT_stmt_list]
7720 if (dwarf_read_debug
)
7721 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
7723 /* Sort in a separate table to maintain the order of all_type_units
7724 for .gdb_index: TU indices directly index all_type_units. */
7725 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
7726 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->per_bfd
->all_type_units
.size ());
7728 for (signatured_type
*sig_type
: dwarf2_per_objfile
->per_bfd
->all_type_units
)
7729 sorted_by_abbrev
.emplace_back
7730 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
7731 sig_type
->per_cu
.section
,
7732 sig_type
->per_cu
.sect_off
));
7734 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
7735 sort_tu_by_abbrev_offset
);
7737 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
7739 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
7741 /* Switch to the next abbrev table if necessary. */
7742 if (abbrev_table
== NULL
7743 || tu
.abbrev_offset
!= abbrev_offset
)
7745 abbrev_offset
= tu
.abbrev_offset
;
7747 abbrev_table::read (dwarf2_per_objfile
->objfile
,
7748 &dwarf2_per_objfile
->per_bfd
->abbrev
,
7750 ++tu_stats
->nr_uniq_abbrev_tables
;
7753 cutu_reader
reader (&tu
.sig_type
->per_cu
, dwarf2_per_objfile
,
7754 abbrev_table
.get (), 0, false);
7755 if (!reader
.dummy_p
)
7756 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7757 reader
.comp_unit_die
);
7761 /* Print collected type unit statistics. */
7764 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7766 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->per_bfd
->tu_stats
;
7768 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
7769 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
7770 dwarf2_per_objfile
->per_bfd
->all_type_units
.size ());
7771 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
7772 tu_stats
->nr_uniq_abbrev_tables
);
7773 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
7774 tu_stats
->nr_symtabs
);
7775 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
7776 tu_stats
->nr_symtab_sharers
);
7777 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
7778 tu_stats
->nr_stmt_less_type_units
);
7779 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
7780 tu_stats
->nr_all_type_units_reallocs
);
7783 /* Traversal function for build_type_psymtabs. */
7786 build_type_psymtab_dependencies (void **slot
, void *info
)
7788 struct dwarf2_per_objfile
*dwarf2_per_objfile
7789 = (struct dwarf2_per_objfile
*) info
;
7790 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7791 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
7792 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
7793 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7794 int len
= (tu_group
->tus
== nullptr) ? 0 : tu_group
->tus
->size ();
7797 gdb_assert (len
> 0);
7798 gdb_assert (per_cu
->type_unit_group_p ());
7800 pst
->number_of_dependencies
= len
;
7801 pst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (len
);
7802 for (i
= 0; i
< len
; ++i
)
7804 struct signatured_type
*iter
= tu_group
->tus
->at (i
);
7805 gdb_assert (iter
->per_cu
.is_debug_types
);
7806 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
7807 iter
->type_unit_group
= tu_group
;
7810 delete tu_group
->tus
;
7811 tu_group
->tus
= nullptr;
7816 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7817 Build partial symbol tables for the .debug_types comp-units. */
7820 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7822 if (! create_all_type_units (dwarf2_per_objfile
))
7825 build_type_psymtabs_1 (dwarf2_per_objfile
);
7828 /* Traversal function for process_skeletonless_type_unit.
7829 Read a TU in a DWO file and build partial symbols for it. */
7832 process_skeletonless_type_unit (void **slot
, void *info
)
7834 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
7835 struct dwarf2_per_objfile
*dwarf2_per_objfile
7836 = (struct dwarf2_per_objfile
*) info
;
7837 struct signatured_type find_entry
, *entry
;
7839 /* If this TU doesn't exist in the global table, add it and read it in. */
7841 if (dwarf2_per_objfile
->per_bfd
->signatured_types
== NULL
)
7842 dwarf2_per_objfile
->per_bfd
->signatured_types
= allocate_signatured_type_table ();
7844 find_entry
.signature
= dwo_unit
->signature
;
7845 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->signatured_types
.get (),
7846 &find_entry
, INSERT
);
7847 /* If we've already seen this type there's nothing to do. What's happening
7848 is we're doing our own version of comdat-folding here. */
7852 /* This does the job that create_all_type_units would have done for
7854 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
7855 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
7858 /* This does the job that build_type_psymtabs_1 would have done. */
7859 cutu_reader
reader (&entry
->per_cu
, dwarf2_per_objfile
, NULL
, 0, false);
7860 if (!reader
.dummy_p
)
7861 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7862 reader
.comp_unit_die
);
7867 /* Traversal function for process_skeletonless_type_units. */
7870 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
7872 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
7874 if (dwo_file
->tus
!= NULL
)
7875 htab_traverse_noresize (dwo_file
->tus
.get (),
7876 process_skeletonless_type_unit
, info
);
7881 /* Scan all TUs of DWO files, verifying we've processed them.
7882 This is needed in case a TU was emitted without its skeleton.
7883 Note: This can't be done until we know what all the DWO files are. */
7886 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7888 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
7889 if (get_dwp_file (dwarf2_per_objfile
) == NULL
7890 && dwarf2_per_objfile
->per_bfd
->dwo_files
!= NULL
)
7892 htab_traverse_noresize (dwarf2_per_objfile
->per_bfd
->dwo_files
.get (),
7893 process_dwo_file_for_skeletonless_type_units
,
7894 dwarf2_per_objfile
);
7898 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
7901 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7903 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
7905 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7910 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
7912 /* Set the 'user' field only if it is not already set. */
7913 if (pst
->dependencies
[j
]->user
== NULL
)
7914 pst
->dependencies
[j
]->user
= pst
;
7919 /* Build the partial symbol table by doing a quick pass through the
7920 .debug_info and .debug_abbrev sections. */
7923 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
7925 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7927 if (dwarf_read_debug
)
7929 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
7930 objfile_name (objfile
));
7933 scoped_restore restore_reading_psyms
7934 = make_scoped_restore (&dwarf2_per_objfile
->per_bfd
->reading_partial_symbols
,
7937 dwarf2_per_objfile
->per_bfd
->info
.read (objfile
);
7939 /* Any cached compilation units will be linked by the per-objfile
7940 read_in_chain. Make sure to free them when we're done. */
7941 free_cached_comp_units
freer (dwarf2_per_objfile
);
7943 build_type_psymtabs (dwarf2_per_objfile
);
7945 create_all_comp_units (dwarf2_per_objfile
);
7947 /* Create a temporary address map on a temporary obstack. We later
7948 copy this to the final obstack. */
7949 auto_obstack temp_obstack
;
7951 scoped_restore save_psymtabs_addrmap
7952 = make_scoped_restore (&objfile
->partial_symtabs
->psymtabs_addrmap
,
7953 addrmap_create_mutable (&temp_obstack
));
7955 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->per_bfd
->all_comp_units
)
7957 if (per_cu
->v
.psymtab
!= NULL
)
7958 /* In case a forward DW_TAG_imported_unit has read the CU already. */
7960 process_psymtab_comp_unit (per_cu
, dwarf2_per_objfile
, false,
7964 /* This has to wait until we read the CUs, we need the list of DWOs. */
7965 process_skeletonless_type_units (dwarf2_per_objfile
);
7967 /* Now that all TUs have been processed we can fill in the dependencies. */
7968 if (dwarf2_per_objfile
->per_bfd
->type_unit_groups
!= NULL
)
7970 htab_traverse_noresize (dwarf2_per_objfile
->per_bfd
->type_unit_groups
.get (),
7971 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
7974 if (dwarf_read_debug
)
7975 print_tu_stats (dwarf2_per_objfile
);
7977 set_partial_user (dwarf2_per_objfile
);
7979 objfile
->partial_symtabs
->psymtabs_addrmap
7980 = addrmap_create_fixed (objfile
->partial_symtabs
->psymtabs_addrmap
,
7981 objfile
->partial_symtabs
->obstack ());
7982 /* At this point we want to keep the address map. */
7983 save_psymtabs_addrmap
.release ();
7985 if (dwarf_read_debug
)
7986 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
7987 objfile_name (objfile
));
7990 /* Load the partial DIEs for a secondary CU into memory.
7991 This is also used when rereading a primary CU with load_all_dies. */
7994 load_partial_comp_unit (dwarf2_per_cu_data
*this_cu
,
7995 dwarf2_per_objfile
*per_objfile
)
7997 cutu_reader
reader (this_cu
, per_objfile
, NULL
, 1, false);
7999 if (!reader
.dummy_p
)
8001 prepare_one_comp_unit (reader
.cu
, reader
.comp_unit_die
,
8004 /* Check if comp unit has_children.
8005 If so, read the rest of the partial symbols from this comp unit.
8006 If not, there's no more debug_info for this comp unit. */
8007 if (reader
.comp_unit_die
->has_children
)
8008 load_partial_dies (&reader
, reader
.info_ptr
, 0);
8015 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
8016 struct dwarf2_section_info
*section
,
8017 struct dwarf2_section_info
*abbrev_section
,
8018 unsigned int is_dwz
)
8020 const gdb_byte
*info_ptr
;
8021 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8023 if (dwarf_read_debug
)
8024 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
8025 section
->get_name (),
8026 section
->get_file_name ());
8028 section
->read (objfile
);
8030 info_ptr
= section
->buffer
;
8032 while (info_ptr
< section
->buffer
+ section
->size
)
8034 struct dwarf2_per_cu_data
*this_cu
;
8036 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
8038 comp_unit_head cu_header
;
8039 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
8040 abbrev_section
, info_ptr
,
8041 rcuh_kind::COMPILE
);
8043 /* Save the compilation unit for later lookup. */
8044 if (cu_header
.unit_type
!= DW_UT_type
)
8045 this_cu
= dwarf2_per_objfile
->per_bfd
->allocate_per_cu ();
8048 auto sig_type
= dwarf2_per_objfile
->per_bfd
->allocate_signatured_type ();
8049 sig_type
->signature
= cu_header
.signature
;
8050 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
8051 this_cu
= &sig_type
->per_cu
;
8053 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
8054 this_cu
->sect_off
= sect_off
;
8055 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
8056 this_cu
->is_dwz
= is_dwz
;
8057 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
8058 this_cu
->section
= section
;
8060 dwarf2_per_objfile
->per_bfd
->all_comp_units
.push_back (this_cu
);
8062 info_ptr
= info_ptr
+ this_cu
->length
;
8066 /* Create a list of all compilation units in OBJFILE.
8067 This is only done for -readnow and building partial symtabs. */
8070 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8072 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_comp_units
.empty ());
8073 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->per_bfd
->info
,
8074 &dwarf2_per_objfile
->per_bfd
->abbrev
, 0);
8076 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
->per_bfd
);
8078 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
8082 /* Process all loaded DIEs for compilation unit CU, starting at
8083 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8084 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8085 DW_AT_ranges). See the comments of add_partial_subprogram on how
8086 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8089 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8090 CORE_ADDR
*highpc
, int set_addrmap
,
8091 struct dwarf2_cu
*cu
)
8093 struct partial_die_info
*pdi
;
8095 /* Now, march along the PDI's, descending into ones which have
8096 interesting children but skipping the children of the other ones,
8097 until we reach the end of the compilation unit. */
8105 /* Anonymous namespaces or modules have no name but have interesting
8106 children, so we need to look at them. Ditto for anonymous
8109 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8110 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8111 || pdi
->tag
== DW_TAG_imported_unit
8112 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8116 case DW_TAG_subprogram
:
8117 case DW_TAG_inlined_subroutine
:
8118 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8120 case DW_TAG_constant
:
8121 case DW_TAG_variable
:
8122 case DW_TAG_typedef
:
8123 case DW_TAG_union_type
:
8124 if (!pdi
->is_declaration
8125 || (pdi
->tag
== DW_TAG_variable
&& pdi
->is_external
))
8127 add_partial_symbol (pdi
, cu
);
8130 case DW_TAG_class_type
:
8131 case DW_TAG_interface_type
:
8132 case DW_TAG_structure_type
:
8133 if (!pdi
->is_declaration
)
8135 add_partial_symbol (pdi
, cu
);
8137 if ((cu
->language
== language_rust
8138 || cu
->language
== language_cplus
) && pdi
->has_children
)
8139 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8142 case DW_TAG_enumeration_type
:
8143 if (!pdi
->is_declaration
)
8144 add_partial_enumeration (pdi
, cu
);
8146 case DW_TAG_base_type
:
8147 case DW_TAG_subrange_type
:
8148 /* File scope base type definitions are added to the partial
8150 add_partial_symbol (pdi
, cu
);
8152 case DW_TAG_namespace
:
8153 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8156 if (!pdi
->is_declaration
)
8157 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8159 case DW_TAG_imported_unit
:
8161 struct dwarf2_per_cu_data
*per_cu
;
8163 /* For now we don't handle imported units in type units. */
8164 if (cu
->per_cu
->is_debug_types
)
8166 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8167 " supported in type units [in module %s]"),
8168 objfile_name (cu
->per_objfile
->objfile
));
8171 per_cu
= dwarf2_find_containing_comp_unit
8172 (pdi
->d
.sect_off
, pdi
->is_dwz
, cu
->per_objfile
);
8174 /* Go read the partial unit, if needed. */
8175 if (per_cu
->v
.psymtab
== NULL
)
8176 process_psymtab_comp_unit (per_cu
, cu
->per_objfile
, true,
8179 cu
->per_cu
->imported_symtabs_push (per_cu
);
8182 case DW_TAG_imported_declaration
:
8183 add_partial_symbol (pdi
, cu
);
8190 /* If the die has a sibling, skip to the sibling. */
8192 pdi
= pdi
->die_sibling
;
8196 /* Functions used to compute the fully scoped name of a partial DIE.
8198 Normally, this is simple. For C++, the parent DIE's fully scoped
8199 name is concatenated with "::" and the partial DIE's name.
8200 Enumerators are an exception; they use the scope of their parent
8201 enumeration type, i.e. the name of the enumeration type is not
8202 prepended to the enumerator.
8204 There are two complexities. One is DW_AT_specification; in this
8205 case "parent" means the parent of the target of the specification,
8206 instead of the direct parent of the DIE. The other is compilers
8207 which do not emit DW_TAG_namespace; in this case we try to guess
8208 the fully qualified name of structure types from their members'
8209 linkage names. This must be done using the DIE's children rather
8210 than the children of any DW_AT_specification target. We only need
8211 to do this for structures at the top level, i.e. if the target of
8212 any DW_AT_specification (if any; otherwise the DIE itself) does not
8215 /* Compute the scope prefix associated with PDI's parent, in
8216 compilation unit CU. The result will be allocated on CU's
8217 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8218 field. NULL is returned if no prefix is necessary. */
8220 partial_die_parent_scope (struct partial_die_info
*pdi
,
8221 struct dwarf2_cu
*cu
)
8223 const char *grandparent_scope
;
8224 struct partial_die_info
*parent
, *real_pdi
;
8226 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8227 then this means the parent of the specification DIE. */
8230 while (real_pdi
->has_specification
)
8232 auto res
= find_partial_die (real_pdi
->spec_offset
,
8233 real_pdi
->spec_is_dwz
, cu
);
8238 parent
= real_pdi
->die_parent
;
8242 if (parent
->scope_set
)
8243 return parent
->scope
;
8247 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8249 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8250 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8251 Work around this problem here. */
8252 if (cu
->language
== language_cplus
8253 && parent
->tag
== DW_TAG_namespace
8254 && strcmp (parent
->name
, "::") == 0
8255 && grandparent_scope
== NULL
)
8257 parent
->scope
= NULL
;
8258 parent
->scope_set
= 1;
8262 /* Nested subroutines in Fortran get a prefix. */
8263 if (pdi
->tag
== DW_TAG_enumerator
)
8264 /* Enumerators should not get the name of the enumeration as a prefix. */
8265 parent
->scope
= grandparent_scope
;
8266 else if (parent
->tag
== DW_TAG_namespace
8267 || parent
->tag
== DW_TAG_module
8268 || parent
->tag
== DW_TAG_structure_type
8269 || parent
->tag
== DW_TAG_class_type
8270 || parent
->tag
== DW_TAG_interface_type
8271 || parent
->tag
== DW_TAG_union_type
8272 || parent
->tag
== DW_TAG_enumeration_type
8273 || (cu
->language
== language_fortran
8274 && parent
->tag
== DW_TAG_subprogram
8275 && pdi
->tag
== DW_TAG_subprogram
))
8277 if (grandparent_scope
== NULL
)
8278 parent
->scope
= parent
->name
;
8280 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8282 parent
->name
, 0, cu
);
8286 /* FIXME drow/2004-04-01: What should we be doing with
8287 function-local names? For partial symbols, we should probably be
8289 complaint (_("unhandled containing DIE tag %s for DIE at %s"),
8290 dwarf_tag_name (parent
->tag
),
8291 sect_offset_str (pdi
->sect_off
));
8292 parent
->scope
= grandparent_scope
;
8295 parent
->scope_set
= 1;
8296 return parent
->scope
;
8299 /* Return the fully scoped name associated with PDI, from compilation unit
8300 CU. The result will be allocated with malloc. */
8302 static gdb::unique_xmalloc_ptr
<char>
8303 partial_die_full_name (struct partial_die_info
*pdi
,
8304 struct dwarf2_cu
*cu
)
8306 const char *parent_scope
;
8308 /* If this is a template instantiation, we can not work out the
8309 template arguments from partial DIEs. So, unfortunately, we have
8310 to go through the full DIEs. At least any work we do building
8311 types here will be reused if full symbols are loaded later. */
8312 if (pdi
->has_template_arguments
)
8316 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8318 struct die_info
*die
;
8319 struct attribute attr
;
8320 struct dwarf2_cu
*ref_cu
= cu
;
8322 /* DW_FORM_ref_addr is using section offset. */
8323 attr
.name
= (enum dwarf_attribute
) 0;
8324 attr
.form
= DW_FORM_ref_addr
;
8325 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8326 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8328 return make_unique_xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8332 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8333 if (parent_scope
== NULL
)
8336 return gdb::unique_xmalloc_ptr
<char> (typename_concat (NULL
, parent_scope
,
8341 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8343 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
8344 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8345 struct gdbarch
*gdbarch
= objfile
->arch ();
8347 const char *actual_name
= NULL
;
8350 baseaddr
= objfile
->text_section_offset ();
8352 gdb::unique_xmalloc_ptr
<char> built_actual_name
8353 = partial_die_full_name (pdi
, cu
);
8354 if (built_actual_name
!= NULL
)
8355 actual_name
= built_actual_name
.get ();
8357 if (actual_name
== NULL
)
8358 actual_name
= pdi
->name
;
8360 partial_symbol psymbol
;
8361 memset (&psymbol
, 0, sizeof (psymbol
));
8362 psymbol
.ginfo
.set_language (cu
->language
, &objfile
->objfile_obstack
);
8363 psymbol
.ginfo
.section
= -1;
8365 /* The code below indicates that the psymbol should be installed by
8367 gdb::optional
<psymbol_placement
> where
;
8371 case DW_TAG_inlined_subroutine
:
8372 case DW_TAG_subprogram
:
8373 addr
= (gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
)
8375 if (pdi
->is_external
8376 || cu
->language
== language_ada
8377 || (cu
->language
== language_fortran
8378 && pdi
->die_parent
!= NULL
8379 && pdi
->die_parent
->tag
== DW_TAG_subprogram
))
8381 /* Normally, only "external" DIEs are part of the global scope.
8382 But in Ada and Fortran, we want to be able to access nested
8383 procedures globally. So all Ada and Fortran subprograms are
8384 stored in the global scope. */
8385 where
= psymbol_placement::GLOBAL
;
8388 where
= psymbol_placement::STATIC
;
8390 psymbol
.domain
= VAR_DOMAIN
;
8391 psymbol
.aclass
= LOC_BLOCK
;
8392 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8393 psymbol
.ginfo
.value
.address
= addr
;
8395 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8396 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8398 case DW_TAG_constant
:
8399 psymbol
.domain
= VAR_DOMAIN
;
8400 psymbol
.aclass
= LOC_STATIC
;
8401 where
= (pdi
->is_external
8402 ? psymbol_placement::GLOBAL
8403 : psymbol_placement::STATIC
);
8405 case DW_TAG_variable
:
8407 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8411 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
8413 /* A global or static variable may also have been stripped
8414 out by the linker if unused, in which case its address
8415 will be nullified; do not add such variables into partial
8416 symbol table then. */
8418 else if (pdi
->is_external
)
8421 Don't enter into the minimal symbol tables as there is
8422 a minimal symbol table entry from the ELF symbols already.
8423 Enter into partial symbol table if it has a location
8424 descriptor or a type.
8425 If the location descriptor is missing, new_symbol will create
8426 a LOC_UNRESOLVED symbol, the address of the variable will then
8427 be determined from the minimal symbol table whenever the variable
8429 The address for the partial symbol table entry is not
8430 used by GDB, but it comes in handy for debugging partial symbol
8433 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8435 psymbol
.domain
= VAR_DOMAIN
;
8436 psymbol
.aclass
= LOC_STATIC
;
8437 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8438 psymbol
.ginfo
.value
.address
= addr
;
8439 where
= psymbol_placement::GLOBAL
;
8444 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8446 /* Static Variable. Skip symbols whose value we cannot know (those
8447 without location descriptors or constant values). */
8448 if (!has_loc
&& !pdi
->has_const_value
)
8451 psymbol
.domain
= VAR_DOMAIN
;
8452 psymbol
.aclass
= LOC_STATIC
;
8453 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8455 psymbol
.ginfo
.value
.address
= addr
;
8456 where
= psymbol_placement::STATIC
;
8459 case DW_TAG_typedef
:
8460 case DW_TAG_base_type
:
8461 case DW_TAG_subrange_type
:
8462 psymbol
.domain
= VAR_DOMAIN
;
8463 psymbol
.aclass
= LOC_TYPEDEF
;
8464 where
= psymbol_placement::STATIC
;
8466 case DW_TAG_imported_declaration
:
8467 case DW_TAG_namespace
:
8468 psymbol
.domain
= VAR_DOMAIN
;
8469 psymbol
.aclass
= LOC_TYPEDEF
;
8470 where
= psymbol_placement::GLOBAL
;
8473 /* With Fortran 77 there might be a "BLOCK DATA" module
8474 available without any name. If so, we skip the module as it
8475 doesn't bring any value. */
8476 if (actual_name
!= nullptr)
8478 psymbol
.domain
= MODULE_DOMAIN
;
8479 psymbol
.aclass
= LOC_TYPEDEF
;
8480 where
= psymbol_placement::GLOBAL
;
8483 case DW_TAG_class_type
:
8484 case DW_TAG_interface_type
:
8485 case DW_TAG_structure_type
:
8486 case DW_TAG_union_type
:
8487 case DW_TAG_enumeration_type
:
8488 /* Skip external references. The DWARF standard says in the section
8489 about "Structure, Union, and Class Type Entries": "An incomplete
8490 structure, union or class type is represented by a structure,
8491 union or class entry that does not have a byte size attribute
8492 and that has a DW_AT_declaration attribute." */
8493 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8496 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8497 static vs. global. */
8498 psymbol
.domain
= STRUCT_DOMAIN
;
8499 psymbol
.aclass
= LOC_TYPEDEF
;
8500 where
= (cu
->language
== language_cplus
8501 ? psymbol_placement::GLOBAL
8502 : psymbol_placement::STATIC
);
8504 case DW_TAG_enumerator
:
8505 psymbol
.domain
= VAR_DOMAIN
;
8506 psymbol
.aclass
= LOC_CONST
;
8507 where
= (cu
->language
== language_cplus
8508 ? psymbol_placement::GLOBAL
8509 : psymbol_placement::STATIC
);
8515 if (where
.has_value ())
8517 if (built_actual_name
!= nullptr)
8518 actual_name
= objfile
->intern (actual_name
);
8519 if (pdi
->linkage_name
== nullptr || cu
->language
== language_ada
)
8520 psymbol
.ginfo
.set_linkage_name (actual_name
);
8523 psymbol
.ginfo
.set_demangled_name (actual_name
,
8524 &objfile
->objfile_obstack
);
8525 psymbol
.ginfo
.set_linkage_name (pdi
->linkage_name
);
8527 add_psymbol_to_list (psymbol
, *where
, objfile
);
8531 /* Read a partial die corresponding to a namespace; also, add a symbol
8532 corresponding to that namespace to the symbol table. NAMESPACE is
8533 the name of the enclosing namespace. */
8536 add_partial_namespace (struct partial_die_info
*pdi
,
8537 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8538 int set_addrmap
, struct dwarf2_cu
*cu
)
8540 /* Add a symbol for the namespace. */
8542 add_partial_symbol (pdi
, cu
);
8544 /* Now scan partial symbols in that namespace. */
8546 if (pdi
->has_children
)
8547 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8550 /* Read a partial die corresponding to a Fortran module. */
8553 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
8554 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
8556 /* Add a symbol for the namespace. */
8558 add_partial_symbol (pdi
, cu
);
8560 /* Now scan partial symbols in that module. */
8562 if (pdi
->has_children
)
8563 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8566 /* Read a partial die corresponding to a subprogram or an inlined
8567 subprogram and create a partial symbol for that subprogram.
8568 When the CU language allows it, this routine also defines a partial
8569 symbol for each nested subprogram that this subprogram contains.
8570 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
8571 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
8573 PDI may also be a lexical block, in which case we simply search
8574 recursively for subprograms defined inside that lexical block.
8575 Again, this is only performed when the CU language allows this
8576 type of definitions. */
8579 add_partial_subprogram (struct partial_die_info
*pdi
,
8580 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8581 int set_addrmap
, struct dwarf2_cu
*cu
)
8583 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
8585 if (pdi
->has_pc_info
)
8587 if (pdi
->lowpc
< *lowpc
)
8588 *lowpc
= pdi
->lowpc
;
8589 if (pdi
->highpc
> *highpc
)
8590 *highpc
= pdi
->highpc
;
8593 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
8594 struct gdbarch
*gdbarch
= objfile
->arch ();
8596 CORE_ADDR this_highpc
;
8597 CORE_ADDR this_lowpc
;
8599 baseaddr
= objfile
->text_section_offset ();
8601 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8602 pdi
->lowpc
+ baseaddr
)
8605 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8606 pdi
->highpc
+ baseaddr
)
8608 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
8609 this_lowpc
, this_highpc
- 1,
8610 cu
->per_cu
->v
.psymtab
);
8614 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
8616 if (!pdi
->is_declaration
)
8617 /* Ignore subprogram DIEs that do not have a name, they are
8618 illegal. Do not emit a complaint at this point, we will
8619 do so when we convert this psymtab into a symtab. */
8621 add_partial_symbol (pdi
, cu
);
8625 if (! pdi
->has_children
)
8628 if (cu
->language
== language_ada
|| cu
->language
== language_fortran
)
8630 pdi
= pdi
->die_child
;
8634 if (pdi
->tag
== DW_TAG_subprogram
8635 || pdi
->tag
== DW_TAG_inlined_subroutine
8636 || pdi
->tag
== DW_TAG_lexical_block
)
8637 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8638 pdi
= pdi
->die_sibling
;
8643 /* Read a partial die corresponding to an enumeration type. */
8646 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
8647 struct dwarf2_cu
*cu
)
8649 struct partial_die_info
*pdi
;
8651 if (enum_pdi
->name
!= NULL
)
8652 add_partial_symbol (enum_pdi
, cu
);
8654 pdi
= enum_pdi
->die_child
;
8657 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
8658 complaint (_("malformed enumerator DIE ignored"));
8660 add_partial_symbol (pdi
, cu
);
8661 pdi
= pdi
->die_sibling
;
8665 /* Return the initial uleb128 in the die at INFO_PTR. */
8668 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
8670 unsigned int bytes_read
;
8672 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8675 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
8676 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
8678 Return the corresponding abbrev, or NULL if the number is zero (indicating
8679 an empty DIE). In either case *BYTES_READ will be set to the length of
8680 the initial number. */
8682 static struct abbrev_info
*
8683 peek_die_abbrev (const die_reader_specs
&reader
,
8684 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
8686 dwarf2_cu
*cu
= reader
.cu
;
8687 bfd
*abfd
= cu
->per_objfile
->objfile
->obfd
;
8688 unsigned int abbrev_number
8689 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
8691 if (abbrev_number
== 0)
8694 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
8697 error (_("Dwarf Error: Could not find abbrev number %d in %s"
8698 " at offset %s [in module %s]"),
8699 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
8700 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
8706 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8707 Returns a pointer to the end of a series of DIEs, terminated by an empty
8708 DIE. Any children of the skipped DIEs will also be skipped. */
8710 static const gdb_byte
*
8711 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
8715 unsigned int bytes_read
;
8716 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
8719 return info_ptr
+ bytes_read
;
8721 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
8725 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8726 INFO_PTR should point just after the initial uleb128 of a DIE, and the
8727 abbrev corresponding to that skipped uleb128 should be passed in
8728 ABBREV. Returns a pointer to this DIE's sibling, skipping any
8731 static const gdb_byte
*
8732 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
8733 struct abbrev_info
*abbrev
)
8735 unsigned int bytes_read
;
8736 struct attribute attr
;
8737 bfd
*abfd
= reader
->abfd
;
8738 struct dwarf2_cu
*cu
= reader
->cu
;
8739 const gdb_byte
*buffer
= reader
->buffer
;
8740 const gdb_byte
*buffer_end
= reader
->buffer_end
;
8741 unsigned int form
, i
;
8743 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
8745 /* The only abbrev we care about is DW_AT_sibling. */
8746 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
8749 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
,
8751 if (attr
.form
== DW_FORM_ref_addr
)
8752 complaint (_("ignoring absolute DW_AT_sibling"));
8755 sect_offset off
= attr
.get_ref_die_offset ();
8756 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
8758 if (sibling_ptr
< info_ptr
)
8759 complaint (_("DW_AT_sibling points backwards"));
8760 else if (sibling_ptr
> reader
->buffer_end
)
8761 reader
->die_section
->overflow_complaint ();
8767 /* If it isn't DW_AT_sibling, skip this attribute. */
8768 form
= abbrev
->attrs
[i
].form
;
8772 case DW_FORM_ref_addr
:
8773 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
8774 and later it is offset sized. */
8775 if (cu
->header
.version
== 2)
8776 info_ptr
+= cu
->header
.addr_size
;
8778 info_ptr
+= cu
->header
.offset_size
;
8780 case DW_FORM_GNU_ref_alt
:
8781 info_ptr
+= cu
->header
.offset_size
;
8784 info_ptr
+= cu
->header
.addr_size
;
8792 case DW_FORM_flag_present
:
8793 case DW_FORM_implicit_const
:
8810 case DW_FORM_ref_sig8
:
8813 case DW_FORM_data16
:
8816 case DW_FORM_string
:
8817 read_direct_string (abfd
, info_ptr
, &bytes_read
);
8818 info_ptr
+= bytes_read
;
8820 case DW_FORM_sec_offset
:
8822 case DW_FORM_GNU_strp_alt
:
8823 info_ptr
+= cu
->header
.offset_size
;
8825 case DW_FORM_exprloc
:
8827 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8828 info_ptr
+= bytes_read
;
8830 case DW_FORM_block1
:
8831 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
8833 case DW_FORM_block2
:
8834 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
8836 case DW_FORM_block4
:
8837 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
8843 case DW_FORM_ref_udata
:
8844 case DW_FORM_GNU_addr_index
:
8845 case DW_FORM_GNU_str_index
:
8846 case DW_FORM_rnglistx
:
8847 case DW_FORM_loclistx
:
8848 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
8850 case DW_FORM_indirect
:
8851 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8852 info_ptr
+= bytes_read
;
8853 /* We need to continue parsing from here, so just go back to
8855 goto skip_attribute
;
8858 error (_("Dwarf Error: Cannot handle %s "
8859 "in DWARF reader [in module %s]"),
8860 dwarf_form_name (form
),
8861 bfd_get_filename (abfd
));
8865 if (abbrev
->has_children
)
8866 return skip_children (reader
, info_ptr
);
8871 /* Locate ORIG_PDI's sibling.
8872 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
8874 static const gdb_byte
*
8875 locate_pdi_sibling (const struct die_reader_specs
*reader
,
8876 struct partial_die_info
*orig_pdi
,
8877 const gdb_byte
*info_ptr
)
8879 /* Do we know the sibling already? */
8881 if (orig_pdi
->sibling
)
8882 return orig_pdi
->sibling
;
8884 /* Are there any children to deal with? */
8886 if (!orig_pdi
->has_children
)
8889 /* Skip the children the long way. */
8891 return skip_children (reader
, info_ptr
);
8894 /* Expand this partial symbol table into a full symbol table. SELF is
8898 dwarf2_psymtab::read_symtab (struct objfile
*objfile
)
8900 struct dwarf2_per_objfile
*dwarf2_per_objfile
8901 = get_dwarf2_per_objfile (objfile
);
8903 gdb_assert (!dwarf2_per_objfile
->symtab_set_p (per_cu_data
));
8905 /* If this psymtab is constructed from a debug-only objfile, the
8906 has_section_at_zero flag will not necessarily be correct. We
8907 can get the correct value for this flag by looking at the data
8908 associated with the (presumably stripped) associated objfile. */
8909 if (objfile
->separate_debug_objfile_backlink
)
8911 struct dwarf2_per_objfile
*dpo_backlink
8912 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
8914 dwarf2_per_objfile
->per_bfd
->has_section_at_zero
8915 = dpo_backlink
->per_bfd
->has_section_at_zero
;
8918 expand_psymtab (objfile
);
8920 process_cu_includes (dwarf2_per_objfile
);
8923 /* Reading in full CUs. */
8925 /* Add PER_CU to the queue. */
8928 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
8929 enum language pretend_language
)
8932 per_cu
->per_bfd
->queue
.emplace (per_cu
, pretend_language
);
8935 /* If PER_CU is not yet queued, add it to the queue.
8936 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
8938 The result is non-zero if PER_CU was queued, otherwise the result is zero
8939 meaning either PER_CU is already queued or it is already loaded.
8941 N.B. There is an invariant here that if a CU is queued then it is loaded.
8942 The caller is required to load PER_CU if we return non-zero. */
8945 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
8946 struct dwarf2_per_cu_data
*per_cu
,
8947 enum language pretend_language
)
8949 /* We may arrive here during partial symbol reading, if we need full
8950 DIEs to process an unusual case (e.g. template arguments). Do
8951 not queue PER_CU, just tell our caller to load its DIEs. */
8952 if (per_cu
->per_bfd
->reading_partial_symbols
)
8954 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
8959 /* Mark the dependence relation so that we don't flush PER_CU
8961 if (dependent_cu
!= NULL
)
8962 dwarf2_add_dependence (dependent_cu
, per_cu
);
8964 /* If it's already on the queue, we have nothing to do. */
8968 /* If the compilation unit is already loaded, just mark it as
8970 if (per_cu
->cu
!= NULL
)
8972 per_cu
->cu
->last_used
= 0;
8976 /* Add it to the queue. */
8977 queue_comp_unit (per_cu
, pretend_language
);
8982 /* Process the queue. */
8985 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8987 if (dwarf_read_debug
)
8989 fprintf_unfiltered (gdb_stdlog
,
8990 "Expanding one or more symtabs of objfile %s ...\n",
8991 objfile_name (dwarf2_per_objfile
->objfile
));
8994 /* The queue starts out with one item, but following a DIE reference
8995 may load a new CU, adding it to the end of the queue. */
8996 while (!dwarf2_per_objfile
->per_bfd
->queue
.empty ())
8998 dwarf2_queue_item
&item
= dwarf2_per_objfile
->per_bfd
->queue
.front ();
9000 if (!dwarf2_per_objfile
->symtab_set_p (item
.per_cu
)
9001 /* Skip dummy CUs. */
9002 && item
.per_cu
->cu
!= NULL
)
9004 struct dwarf2_per_cu_data
*per_cu
= item
.per_cu
;
9005 unsigned int debug_print_threshold
;
9008 if (per_cu
->is_debug_types
)
9010 struct signatured_type
*sig_type
=
9011 (struct signatured_type
*) per_cu
;
9013 sprintf (buf
, "TU %s at offset %s",
9014 hex_string (sig_type
->signature
),
9015 sect_offset_str (per_cu
->sect_off
));
9016 /* There can be 100s of TUs.
9017 Only print them in verbose mode. */
9018 debug_print_threshold
= 2;
9022 sprintf (buf
, "CU at offset %s",
9023 sect_offset_str (per_cu
->sect_off
));
9024 debug_print_threshold
= 1;
9027 if (dwarf_read_debug
>= debug_print_threshold
)
9028 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
9030 if (per_cu
->is_debug_types
)
9031 process_full_type_unit (per_cu
, item
.pretend_language
);
9033 process_full_comp_unit (per_cu
, item
.pretend_language
);
9035 if (dwarf_read_debug
>= debug_print_threshold
)
9036 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
9039 item
.per_cu
->queued
= 0;
9040 dwarf2_per_objfile
->per_bfd
->queue
.pop ();
9043 if (dwarf_read_debug
)
9045 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
9046 objfile_name (dwarf2_per_objfile
->objfile
));
9050 /* Read in full symbols for PST, and anything it depends on. */
9053 dwarf2_psymtab::expand_psymtab (struct objfile
*objfile
)
9055 gdb_assert (!readin_p (objfile
));
9057 expand_dependencies (objfile
);
9059 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
9060 dw2_do_instantiate_symtab (per_cu_data
, per_objfile
, false);
9061 gdb_assert (get_compunit_symtab (objfile
) != nullptr);
9064 /* See psympriv.h. */
9067 dwarf2_psymtab::readin_p (struct objfile
*objfile
) const
9069 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
9070 return per_objfile
->symtab_set_p (per_cu_data
);
9073 /* See psympriv.h. */
9076 dwarf2_psymtab::get_compunit_symtab (struct objfile
*objfile
) const
9078 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
9079 return per_objfile
->get_symtab (per_cu_data
);
9082 /* Trivial hash function for die_info: the hash value of a DIE
9083 is its offset in .debug_info for this objfile. */
9086 die_hash (const void *item
)
9088 const struct die_info
*die
= (const struct die_info
*) item
;
9090 return to_underlying (die
->sect_off
);
9093 /* Trivial comparison function for die_info structures: two DIEs
9094 are equal if they have the same offset. */
9097 die_eq (const void *item_lhs
, const void *item_rhs
)
9099 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9100 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9102 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9105 /* Load the DIEs associated with PER_CU into memory. */
9108 load_full_comp_unit (dwarf2_per_cu_data
*this_cu
,
9109 dwarf2_per_objfile
*per_objfile
,
9111 enum language pretend_language
)
9113 gdb_assert (! this_cu
->is_debug_types
);
9115 cutu_reader
reader (this_cu
, per_objfile
, NULL
, 1, skip_partial
);
9119 struct dwarf2_cu
*cu
= reader
.cu
;
9120 const gdb_byte
*info_ptr
= reader
.info_ptr
;
9122 gdb_assert (cu
->die_hash
== NULL
);
9124 htab_create_alloc_ex (cu
->header
.length
/ 12,
9128 &cu
->comp_unit_obstack
,
9129 hashtab_obstack_allocate
,
9130 dummy_obstack_deallocate
);
9132 if (reader
.comp_unit_die
->has_children
)
9133 reader
.comp_unit_die
->child
9134 = read_die_and_siblings (&reader
, reader
.info_ptr
,
9135 &info_ptr
, reader
.comp_unit_die
);
9136 cu
->dies
= reader
.comp_unit_die
;
9137 /* comp_unit_die is not stored in die_hash, no need. */
9139 /* We try not to read any attributes in this function, because not
9140 all CUs needed for references have been loaded yet, and symbol
9141 table processing isn't initialized. But we have to set the CU language,
9142 or we won't be able to build types correctly.
9143 Similarly, if we do not read the producer, we can not apply
9144 producer-specific interpretation. */
9145 prepare_one_comp_unit (cu
, cu
->dies
, pretend_language
);
9150 /* Add a DIE to the delayed physname list. */
9153 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9154 const char *name
, struct die_info
*die
,
9155 struct dwarf2_cu
*cu
)
9157 struct delayed_method_info mi
;
9159 mi
.fnfield_index
= fnfield_index
;
9163 cu
->method_list
.push_back (mi
);
9166 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9167 "const" / "volatile". If so, decrements LEN by the length of the
9168 modifier and return true. Otherwise return false. */
9172 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9174 size_t mod_len
= sizeof (mod
) - 1;
9175 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9183 /* Compute the physnames of any methods on the CU's method list.
9185 The computation of method physnames is delayed in order to avoid the
9186 (bad) condition that one of the method's formal parameters is of an as yet
9190 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9192 /* Only C++ delays computing physnames. */
9193 if (cu
->method_list
.empty ())
9195 gdb_assert (cu
->language
== language_cplus
);
9197 for (const delayed_method_info
&mi
: cu
->method_list
)
9199 const char *physname
;
9200 struct fn_fieldlist
*fn_flp
9201 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9202 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9203 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9204 = physname
? physname
: "";
9206 /* Since there's no tag to indicate whether a method is a
9207 const/volatile overload, extract that information out of the
9209 if (physname
!= NULL
)
9211 size_t len
= strlen (physname
);
9215 if (physname
[len
] == ')') /* shortcut */
9217 else if (check_modifier (physname
, len
, " const"))
9218 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9219 else if (check_modifier (physname
, len
, " volatile"))
9220 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9227 /* The list is no longer needed. */
9228 cu
->method_list
.clear ();
9231 /* Go objects should be embedded in a DW_TAG_module DIE,
9232 and it's not clear if/how imported objects will appear.
9233 To keep Go support simple until that's worked out,
9234 go back through what we've read and create something usable.
9235 We could do this while processing each DIE, and feels kinda cleaner,
9236 but that way is more invasive.
9237 This is to, for example, allow the user to type "p var" or "b main"
9238 without having to specify the package name, and allow lookups
9239 of module.object to work in contexts that use the expression
9243 fixup_go_packaging (struct dwarf2_cu
*cu
)
9245 gdb::unique_xmalloc_ptr
<char> package_name
;
9246 struct pending
*list
;
9249 for (list
= *cu
->get_builder ()->get_global_symbols ();
9253 for (i
= 0; i
< list
->nsyms
; ++i
)
9255 struct symbol
*sym
= list
->symbol
[i
];
9257 if (sym
->language () == language_go
9258 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9260 gdb::unique_xmalloc_ptr
<char> this_package_name
9261 (go_symbol_package_name (sym
));
9263 if (this_package_name
== NULL
)
9265 if (package_name
== NULL
)
9266 package_name
= std::move (this_package_name
);
9269 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
9270 if (strcmp (package_name
.get (), this_package_name
.get ()) != 0)
9271 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9272 (symbol_symtab (sym
) != NULL
9273 ? symtab_to_filename_for_display
9274 (symbol_symtab (sym
))
9275 : objfile_name (objfile
)),
9276 this_package_name
.get (), package_name
.get ());
9282 if (package_name
!= NULL
)
9284 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
9285 const char *saved_package_name
= objfile
->intern (package_name
.get ());
9286 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9287 saved_package_name
);
9290 sym
= new (&objfile
->objfile_obstack
) symbol
;
9291 sym
->set_language (language_go
, &objfile
->objfile_obstack
);
9292 sym
->compute_and_set_names (saved_package_name
, false, objfile
->per_bfd
);
9293 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9294 e.g., "main" finds the "main" module and not C's main(). */
9295 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9296 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9297 SYMBOL_TYPE (sym
) = type
;
9299 add_symbol_to_list (sym
, cu
->get_builder ()->get_global_symbols ());
9303 /* Allocate a fully-qualified name consisting of the two parts on the
9307 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9309 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9312 /* A helper that allocates a variant part to attach to a Rust enum
9313 type. OBSTACK is where the results should be allocated. TYPE is
9314 the type we're processing. DISCRIMINANT_INDEX is the index of the
9315 discriminant. It must be the index of one of the fields of TYPE.
9316 DEFAULT_INDEX is the index of the default field; or -1 if there is
9317 no default. RANGES is indexed by "effective" field number (the
9318 field index, but omitting the discriminant and default fields) and
9319 must hold the discriminant values used by the variants. Note that
9320 RANGES must have a lifetime at least as long as OBSTACK -- either
9321 already allocated on it, or static. */
9324 alloc_rust_variant (struct obstack
*obstack
, struct type
*type
,
9325 int discriminant_index
, int default_index
,
9326 gdb::array_view
<discriminant_range
> ranges
)
9328 /* When DISCRIMINANT_INDEX == -1, we have a univariant enum. Those
9329 must be handled by the caller. */
9330 gdb_assert (discriminant_index
>= 0
9331 && discriminant_index
< type
->num_fields ());
9332 gdb_assert (default_index
== -1
9333 || (default_index
>= 0 && default_index
< type
->num_fields ()));
9335 /* We have one variant for each non-discriminant field. */
9336 int n_variants
= type
->num_fields () - 1;
9338 variant
*variants
= new (obstack
) variant
[n_variants
];
9341 for (int i
= 0; i
< type
->num_fields (); ++i
)
9343 if (i
== discriminant_index
)
9346 variants
[var_idx
].first_field
= i
;
9347 variants
[var_idx
].last_field
= i
+ 1;
9349 /* The default field does not need a range, but other fields do.
9350 We skipped the discriminant above. */
9351 if (i
!= default_index
)
9353 variants
[var_idx
].discriminants
= ranges
.slice (range_idx
, 1);
9360 gdb_assert (range_idx
== ranges
.size ());
9361 gdb_assert (var_idx
== n_variants
);
9363 variant_part
*part
= new (obstack
) variant_part
;
9364 part
->discriminant_index
= discriminant_index
;
9365 part
->is_unsigned
= TYPE_UNSIGNED (TYPE_FIELD_TYPE (type
,
9366 discriminant_index
));
9367 part
->variants
= gdb::array_view
<variant
> (variants
, n_variants
);
9369 void *storage
= obstack_alloc (obstack
, sizeof (gdb::array_view
<variant_part
>));
9370 gdb::array_view
<variant_part
> *prop_value
9371 = new (storage
) gdb::array_view
<variant_part
> (part
, 1);
9373 struct dynamic_prop prop
;
9374 prop
.kind
= PROP_VARIANT_PARTS
;
9375 prop
.data
.variant_parts
= prop_value
;
9377 type
->add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
);
9380 /* Some versions of rustc emitted enums in an unusual way.
9382 Ordinary enums were emitted as unions. The first element of each
9383 structure in the union was named "RUST$ENUM$DISR". This element
9384 held the discriminant.
9386 These versions of Rust also implemented the "non-zero"
9387 optimization. When the enum had two values, and one is empty and
9388 the other holds a pointer that cannot be zero, the pointer is used
9389 as the discriminant, with a zero value meaning the empty variant.
9390 Here, the union's first member is of the form
9391 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9392 where the fieldnos are the indices of the fields that should be
9393 traversed in order to find the field (which may be several fields deep)
9394 and the variantname is the name of the variant of the case when the
9397 This function recognizes whether TYPE is of one of these forms,
9398 and, if so, smashes it to be a variant type. */
9401 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9403 gdb_assert (type
->code () == TYPE_CODE_UNION
);
9405 /* We don't need to deal with empty enums. */
9406 if (type
->num_fields () == 0)
9409 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9410 if (type
->num_fields () == 1
9411 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9413 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9415 /* Decode the field name to find the offset of the
9417 ULONGEST bit_offset
= 0;
9418 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9419 while (name
[0] >= '0' && name
[0] <= '9')
9422 unsigned long index
= strtoul (name
, &tail
, 10);
9425 || index
>= field_type
->num_fields ()
9426 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9427 != FIELD_LOC_KIND_BITPOS
))
9429 complaint (_("Could not parse Rust enum encoding string \"%s\""
9431 TYPE_FIELD_NAME (type
, 0),
9432 objfile_name (objfile
));
9437 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9438 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9441 /* Smash this type to be a structure type. We have to do this
9442 because the type has already been recorded. */
9443 type
->set_code (TYPE_CODE_STRUCT
);
9444 type
->set_num_fields (3);
9445 /* Save the field we care about. */
9446 struct field saved_field
= type
->field (0);
9448 ((struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
)));
9450 /* Put the discriminant at index 0. */
9451 TYPE_FIELD_TYPE (type
, 0) = field_type
;
9452 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9453 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9454 SET_FIELD_BITPOS (type
->field (0), bit_offset
);
9456 /* The order of fields doesn't really matter, so put the real
9457 field at index 1 and the data-less field at index 2. */
9458 type
->field (1) = saved_field
;
9459 TYPE_FIELD_NAME (type
, 1)
9460 = rust_last_path_segment (TYPE_FIELD_TYPE (type
, 1)->name ());
9461 TYPE_FIELD_TYPE (type
, 1)->set_name
9462 (rust_fully_qualify (&objfile
->objfile_obstack
, type
->name (),
9463 TYPE_FIELD_NAME (type
, 1)));
9465 const char *dataless_name
9466 = rust_fully_qualify (&objfile
->objfile_obstack
, type
->name (),
9468 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9470 TYPE_FIELD_TYPE (type
, 2) = dataless_type
;
9471 /* NAME points into the original discriminant name, which
9472 already has the correct lifetime. */
9473 TYPE_FIELD_NAME (type
, 2) = name
;
9474 SET_FIELD_BITPOS (type
->field (2), 0);
9476 /* Indicate that this is a variant type. */
9477 static discriminant_range ranges
[1] = { { 0, 0 } };
9478 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, 1, ranges
);
9480 /* A union with a single anonymous field is probably an old-style
9482 else if (type
->num_fields () == 1 && streq (TYPE_FIELD_NAME (type
, 0), ""))
9484 /* Smash this type to be a structure type. We have to do this
9485 because the type has already been recorded. */
9486 type
->set_code (TYPE_CODE_STRUCT
);
9488 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9489 const char *variant_name
9490 = rust_last_path_segment (field_type
->name ());
9491 TYPE_FIELD_NAME (type
, 0) = variant_name
;
9492 field_type
->set_name
9493 (rust_fully_qualify (&objfile
->objfile_obstack
,
9494 type
->name (), variant_name
));
9498 struct type
*disr_type
= nullptr;
9499 for (int i
= 0; i
< type
->num_fields (); ++i
)
9501 disr_type
= TYPE_FIELD_TYPE (type
, i
);
9503 if (disr_type
->code () != TYPE_CODE_STRUCT
)
9505 /* All fields of a true enum will be structs. */
9508 else if (disr_type
->num_fields () == 0)
9510 /* Could be data-less variant, so keep going. */
9511 disr_type
= nullptr;
9513 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
9514 "RUST$ENUM$DISR") != 0)
9516 /* Not a Rust enum. */
9526 /* If we got here without a discriminant, then it's probably
9528 if (disr_type
== nullptr)
9531 /* Smash this type to be a structure type. We have to do this
9532 because the type has already been recorded. */
9533 type
->set_code (TYPE_CODE_STRUCT
);
9535 /* Make space for the discriminant field. */
9536 struct field
*disr_field
= &disr_type
->field (0);
9538 = (struct field
*) TYPE_ZALLOC (type
, ((type
->num_fields () + 1)
9539 * sizeof (struct field
)));
9540 memcpy (new_fields
+ 1, type
->fields (),
9541 type
->num_fields () * sizeof (struct field
));
9542 type
->set_fields (new_fields
);
9543 type
->set_num_fields (type
->num_fields () + 1);
9545 /* Install the discriminant at index 0 in the union. */
9546 type
->field (0) = *disr_field
;
9547 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9548 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9550 /* We need a way to find the correct discriminant given a
9551 variant name. For convenience we build a map here. */
9552 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
9553 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
9554 for (int i
= 0; i
< enum_type
->num_fields (); ++i
)
9556 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
9559 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
9560 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
9564 int n_fields
= type
->num_fields ();
9565 /* We don't need a range entry for the discriminant, but we do
9566 need one for every other field, as there is no default
9568 discriminant_range
*ranges
= XOBNEWVEC (&objfile
->objfile_obstack
,
9571 /* Skip the discriminant here. */
9572 for (int i
= 1; i
< n_fields
; ++i
)
9574 /* Find the final word in the name of this variant's type.
9575 That name can be used to look up the correct
9577 const char *variant_name
9578 = rust_last_path_segment (TYPE_FIELD_TYPE (type
, i
)->name ());
9580 auto iter
= discriminant_map
.find (variant_name
);
9581 if (iter
!= discriminant_map
.end ())
9583 ranges
[i
].low
= iter
->second
;
9584 ranges
[i
].high
= iter
->second
;
9587 /* Remove the discriminant field, if it exists. */
9588 struct type
*sub_type
= TYPE_FIELD_TYPE (type
, i
);
9589 if (sub_type
->num_fields () > 0)
9591 sub_type
->set_num_fields (sub_type
->num_fields () - 1);
9592 sub_type
->set_fields (sub_type
->fields () + 1);
9594 TYPE_FIELD_NAME (type
, i
) = variant_name
;
9596 (rust_fully_qualify (&objfile
->objfile_obstack
,
9597 type
->name (), variant_name
));
9600 /* Indicate that this is a variant type. */
9601 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, 1,
9602 gdb::array_view
<discriminant_range
> (ranges
,
9607 /* Rewrite some Rust unions to be structures with variants parts. */
9610 rust_union_quirks (struct dwarf2_cu
*cu
)
9612 gdb_assert (cu
->language
== language_rust
);
9613 for (type
*type_
: cu
->rust_unions
)
9614 quirk_rust_enum (type_
, cu
->per_objfile
->objfile
);
9615 /* We don't need this any more. */
9616 cu
->rust_unions
.clear ();
9619 /* A helper function for computing the list of all symbol tables
9620 included by PER_CU. */
9623 recursively_compute_inclusions (std::vector
<compunit_symtab
*> *result
,
9624 htab_t all_children
, htab_t all_type_symtabs
,
9625 struct dwarf2_per_cu_data
*per_cu
,
9626 struct compunit_symtab
*immediate_parent
)
9628 void **slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
9631 /* This inclusion and its children have been processed. */
9637 /* Only add a CU if it has a symbol table. */
9638 compunit_symtab
*cust
= per_cu
->dwarf2_per_objfile
->get_symtab (per_cu
);
9641 /* If this is a type unit only add its symbol table if we haven't
9642 seen it yet (type unit per_cu's can share symtabs). */
9643 if (per_cu
->is_debug_types
)
9645 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
9649 result
->push_back (cust
);
9650 if (cust
->user
== NULL
)
9651 cust
->user
= immediate_parent
;
9656 result
->push_back (cust
);
9657 if (cust
->user
== NULL
)
9658 cust
->user
= immediate_parent
;
9662 if (!per_cu
->imported_symtabs_empty ())
9663 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9665 recursively_compute_inclusions (result
, all_children
,
9666 all_type_symtabs
, ptr
, cust
);
9670 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
9674 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
9676 gdb_assert (! per_cu
->is_debug_types
);
9678 if (!per_cu
->imported_symtabs_empty ())
9681 std::vector
<compunit_symtab
*> result_symtabs
;
9682 htab_t all_children
, all_type_symtabs
;
9683 compunit_symtab
*cust
= per_cu
->dwarf2_per_objfile
->get_symtab (per_cu
);
9685 /* If we don't have a symtab, we can just skip this case. */
9689 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9690 NULL
, xcalloc
, xfree
);
9691 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
9692 NULL
, xcalloc
, xfree
);
9694 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9696 recursively_compute_inclusions (&result_symtabs
, all_children
,
9697 all_type_symtabs
, ptr
, cust
);
9700 /* Now we have a transitive closure of all the included symtabs. */
9701 len
= result_symtabs
.size ();
9703 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
9704 struct compunit_symtab
*, len
+ 1);
9705 memcpy (cust
->includes
, result_symtabs
.data (),
9706 len
* sizeof (compunit_symtab
*));
9707 cust
->includes
[len
] = NULL
;
9709 htab_delete (all_children
);
9710 htab_delete (all_type_symtabs
);
9714 /* Compute the 'includes' field for the symtabs of all the CUs we just
9718 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9720 for (dwarf2_per_cu_data
*iter
: dwarf2_per_objfile
->per_bfd
->just_read_cus
)
9722 if (! iter
->is_debug_types
)
9723 compute_compunit_symtab_includes (iter
);
9726 dwarf2_per_objfile
->per_bfd
->just_read_cus
.clear ();
9729 /* Generate full symbol information for PER_CU, whose DIEs have
9730 already been loaded into memory. */
9733 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9734 enum language pretend_language
)
9736 struct dwarf2_cu
*cu
= per_cu
->cu
;
9737 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
9738 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9739 struct gdbarch
*gdbarch
= objfile
->arch ();
9740 CORE_ADDR lowpc
, highpc
;
9741 struct compunit_symtab
*cust
;
9743 struct block
*static_block
;
9746 baseaddr
= objfile
->text_section_offset ();
9748 /* Clear the list here in case something was left over. */
9749 cu
->method_list
.clear ();
9751 cu
->language
= pretend_language
;
9752 cu
->language_defn
= language_def (cu
->language
);
9754 /* Do line number decoding in read_file_scope () */
9755 process_die (cu
->dies
, cu
);
9757 /* For now fudge the Go package. */
9758 if (cu
->language
== language_go
)
9759 fixup_go_packaging (cu
);
9761 /* Now that we have processed all the DIEs in the CU, all the types
9762 should be complete, and it should now be safe to compute all of the
9764 compute_delayed_physnames (cu
);
9766 if (cu
->language
== language_rust
)
9767 rust_union_quirks (cu
);
9769 /* Some compilers don't define a DW_AT_high_pc attribute for the
9770 compilation unit. If the DW_AT_high_pc is missing, synthesize
9771 it, by scanning the DIE's below the compilation unit. */
9772 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
9774 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
9775 static_block
= cu
->get_builder ()->end_symtab_get_static_block (addr
, 0, 1);
9777 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
9778 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
9779 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
9780 addrmap to help ensure it has an accurate map of pc values belonging to
9782 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
9784 cust
= cu
->get_builder ()->end_symtab_from_static_block (static_block
,
9785 SECT_OFF_TEXT (objfile
),
9790 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
9792 /* Set symtab language to language from DW_AT_language. If the
9793 compilation is from a C file generated by language preprocessors, do
9794 not set the language if it was already deduced by start_subfile. */
9795 if (!(cu
->language
== language_c
9796 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
9797 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9799 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
9800 produce DW_AT_location with location lists but it can be possibly
9801 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
9802 there were bugs in prologue debug info, fixed later in GCC-4.5
9803 by "unwind info for epilogues" patch (which is not directly related).
9805 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
9806 needed, it would be wrong due to missing DW_AT_producer there.
9808 Still one can confuse GDB by using non-standard GCC compilation
9809 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
9811 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
9812 cust
->locations_valid
= 1;
9814 if (gcc_4_minor
>= 5)
9815 cust
->epilogue_unwind_valid
= 1;
9817 cust
->call_site_htab
= cu
->call_site_htab
;
9820 dwarf2_per_objfile
->set_symtab (per_cu
, cust
);
9822 /* Push it for inclusion processing later. */
9823 dwarf2_per_objfile
->per_bfd
->just_read_cus
.push_back (per_cu
);
9825 /* Not needed any more. */
9826 cu
->reset_builder ();
9829 /* Generate full symbol information for type unit PER_CU, whose DIEs have
9830 already been loaded into memory. */
9833 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
9834 enum language pretend_language
)
9836 struct dwarf2_cu
*cu
= per_cu
->cu
;
9837 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
9838 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
9839 struct compunit_symtab
*cust
;
9840 struct signatured_type
*sig_type
;
9842 gdb_assert (per_cu
->is_debug_types
);
9843 sig_type
= (struct signatured_type
*) per_cu
;
9845 /* Clear the list here in case something was left over. */
9846 cu
->method_list
.clear ();
9848 cu
->language
= pretend_language
;
9849 cu
->language_defn
= language_def (cu
->language
);
9851 /* The symbol tables are set up in read_type_unit_scope. */
9852 process_die (cu
->dies
, cu
);
9854 /* For now fudge the Go package. */
9855 if (cu
->language
== language_go
)
9856 fixup_go_packaging (cu
);
9858 /* Now that we have processed all the DIEs in the CU, all the types
9859 should be complete, and it should now be safe to compute all of the
9861 compute_delayed_physnames (cu
);
9863 if (cu
->language
== language_rust
)
9864 rust_union_quirks (cu
);
9866 /* TUs share symbol tables.
9867 If this is the first TU to use this symtab, complete the construction
9868 of it with end_expandable_symtab. Otherwise, complete the addition of
9869 this TU's symbols to the existing symtab. */
9870 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
9872 buildsym_compunit
*builder
= cu
->get_builder ();
9873 cust
= builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
9874 sig_type
->type_unit_group
->compunit_symtab
= cust
;
9878 /* Set symtab language to language from DW_AT_language. If the
9879 compilation is from a C file generated by language preprocessors,
9880 do not set the language if it was already deduced by
9882 if (!(cu
->language
== language_c
9883 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
9884 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9889 cu
->get_builder ()->augment_type_symtab ();
9890 cust
= sig_type
->type_unit_group
->compunit_symtab
;
9893 dwarf2_per_objfile
->set_symtab (per_cu
, cust
);
9895 /* Not needed any more. */
9896 cu
->reset_builder ();
9899 /* Process an imported unit DIE. */
9902 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9904 struct attribute
*attr
;
9906 /* For now we don't handle imported units in type units. */
9907 if (cu
->per_cu
->is_debug_types
)
9909 error (_("Dwarf Error: DW_TAG_imported_unit is not"
9910 " supported in type units [in module %s]"),
9911 objfile_name (cu
->per_objfile
->objfile
));
9914 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
9917 sect_offset sect_off
= attr
->get_ref_die_offset ();
9918 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
9919 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
9920 dwarf2_per_cu_data
*per_cu
9921 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
, per_objfile
);
9923 /* We're importing a C++ compilation unit with tag DW_TAG_compile_unit
9924 into another compilation unit, at root level. Regard this as a hint,
9926 if (die
->parent
&& die
->parent
->parent
== NULL
9927 && per_cu
->unit_type
== DW_UT_compile
9928 && per_cu
->lang
== language_cplus
)
9931 /* If necessary, add it to the queue and load its DIEs. */
9932 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
9933 load_full_comp_unit (per_cu
, per_objfile
, false, cu
->language
);
9935 cu
->per_cu
->imported_symtabs_push (per_cu
);
9939 /* RAII object that represents a process_die scope: i.e.,
9940 starts/finishes processing a DIE. */
9941 class process_die_scope
9944 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
9945 : m_die (die
), m_cu (cu
)
9947 /* We should only be processing DIEs not already in process. */
9948 gdb_assert (!m_die
->in_process
);
9949 m_die
->in_process
= true;
9952 ~process_die_scope ()
9954 m_die
->in_process
= false;
9956 /* If we're done processing the DIE for the CU that owns the line
9957 header, we don't need the line header anymore. */
9958 if (m_cu
->line_header_die_owner
== m_die
)
9960 delete m_cu
->line_header
;
9961 m_cu
->line_header
= NULL
;
9962 m_cu
->line_header_die_owner
= NULL
;
9971 /* Process a die and its children. */
9974 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
9976 process_die_scope
scope (die
, cu
);
9980 case DW_TAG_padding
:
9982 case DW_TAG_compile_unit
:
9983 case DW_TAG_partial_unit
:
9984 read_file_scope (die
, cu
);
9986 case DW_TAG_type_unit
:
9987 read_type_unit_scope (die
, cu
);
9989 case DW_TAG_subprogram
:
9990 /* Nested subprograms in Fortran get a prefix. */
9991 if (cu
->language
== language_fortran
9992 && die
->parent
!= NULL
9993 && die
->parent
->tag
== DW_TAG_subprogram
)
9994 cu
->processing_has_namespace_info
= true;
9996 case DW_TAG_inlined_subroutine
:
9997 read_func_scope (die
, cu
);
9999 case DW_TAG_lexical_block
:
10000 case DW_TAG_try_block
:
10001 case DW_TAG_catch_block
:
10002 read_lexical_block_scope (die
, cu
);
10004 case DW_TAG_call_site
:
10005 case DW_TAG_GNU_call_site
:
10006 read_call_site_scope (die
, cu
);
10008 case DW_TAG_class_type
:
10009 case DW_TAG_interface_type
:
10010 case DW_TAG_structure_type
:
10011 case DW_TAG_union_type
:
10012 process_structure_scope (die
, cu
);
10014 case DW_TAG_enumeration_type
:
10015 process_enumeration_scope (die
, cu
);
10018 /* These dies have a type, but processing them does not create
10019 a symbol or recurse to process the children. Therefore we can
10020 read them on-demand through read_type_die. */
10021 case DW_TAG_subroutine_type
:
10022 case DW_TAG_set_type
:
10023 case DW_TAG_array_type
:
10024 case DW_TAG_pointer_type
:
10025 case DW_TAG_ptr_to_member_type
:
10026 case DW_TAG_reference_type
:
10027 case DW_TAG_rvalue_reference_type
:
10028 case DW_TAG_string_type
:
10031 case DW_TAG_base_type
:
10032 case DW_TAG_subrange_type
:
10033 case DW_TAG_typedef
:
10034 /* Add a typedef symbol for the type definition, if it has a
10036 new_symbol (die
, read_type_die (die
, cu
), cu
);
10038 case DW_TAG_common_block
:
10039 read_common_block (die
, cu
);
10041 case DW_TAG_common_inclusion
:
10043 case DW_TAG_namespace
:
10044 cu
->processing_has_namespace_info
= true;
10045 read_namespace (die
, cu
);
10047 case DW_TAG_module
:
10048 cu
->processing_has_namespace_info
= true;
10049 read_module (die
, cu
);
10051 case DW_TAG_imported_declaration
:
10052 cu
->processing_has_namespace_info
= true;
10053 if (read_namespace_alias (die
, cu
))
10055 /* The declaration is not a global namespace alias. */
10056 /* Fall through. */
10057 case DW_TAG_imported_module
:
10058 cu
->processing_has_namespace_info
= true;
10059 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10060 || cu
->language
!= language_fortran
))
10061 complaint (_("Tag '%s' has unexpected children"),
10062 dwarf_tag_name (die
->tag
));
10063 read_import_statement (die
, cu
);
10066 case DW_TAG_imported_unit
:
10067 process_imported_unit_die (die
, cu
);
10070 case DW_TAG_variable
:
10071 read_variable (die
, cu
);
10075 new_symbol (die
, NULL
, cu
);
10080 /* DWARF name computation. */
10082 /* A helper function for dwarf2_compute_name which determines whether DIE
10083 needs to have the name of the scope prepended to the name listed in the
10087 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10089 struct attribute
*attr
;
10093 case DW_TAG_namespace
:
10094 case DW_TAG_typedef
:
10095 case DW_TAG_class_type
:
10096 case DW_TAG_interface_type
:
10097 case DW_TAG_structure_type
:
10098 case DW_TAG_union_type
:
10099 case DW_TAG_enumeration_type
:
10100 case DW_TAG_enumerator
:
10101 case DW_TAG_subprogram
:
10102 case DW_TAG_inlined_subroutine
:
10103 case DW_TAG_member
:
10104 case DW_TAG_imported_declaration
:
10107 case DW_TAG_variable
:
10108 case DW_TAG_constant
:
10109 /* We only need to prefix "globally" visible variables. These include
10110 any variable marked with DW_AT_external or any variable that
10111 lives in a namespace. [Variables in anonymous namespaces
10112 require prefixing, but they are not DW_AT_external.] */
10114 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10116 struct dwarf2_cu
*spec_cu
= cu
;
10118 return die_needs_namespace (die_specification (die
, &spec_cu
),
10122 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10123 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10124 && die
->parent
->tag
!= DW_TAG_module
)
10126 /* A variable in a lexical block of some kind does not need a
10127 namespace, even though in C++ such variables may be external
10128 and have a mangled name. */
10129 if (die
->parent
->tag
== DW_TAG_lexical_block
10130 || die
->parent
->tag
== DW_TAG_try_block
10131 || die
->parent
->tag
== DW_TAG_catch_block
10132 || die
->parent
->tag
== DW_TAG_subprogram
)
10141 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10142 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10143 defined for the given DIE. */
10145 static struct attribute
*
10146 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10148 struct attribute
*attr
;
10150 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10152 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10157 /* Return the DIE's linkage name as a string, 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 const char *
10162 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10164 const char *linkage_name
;
10166 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10167 if (linkage_name
== NULL
)
10168 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10170 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10171 See https://github.com/rust-lang/rust/issues/32925. */
10172 if (cu
->language
== language_rust
&& linkage_name
!= NULL
10173 && strchr (linkage_name
, '{') != NULL
)
10174 linkage_name
= NULL
;
10176 return linkage_name
;
10179 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10180 compute the physname for the object, which include a method's:
10181 - formal parameters (C++),
10182 - receiver type (Go),
10184 The term "physname" is a bit confusing.
10185 For C++, for example, it is the demangled name.
10186 For Go, for example, it's the mangled name.
10188 For Ada, return the DIE's linkage name rather than the fully qualified
10189 name. PHYSNAME is ignored..
10191 The result is allocated on the objfile->per_bfd's obstack and
10194 static const char *
10195 dwarf2_compute_name (const char *name
,
10196 struct die_info
*die
, struct dwarf2_cu
*cu
,
10199 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
10202 name
= dwarf2_name (die
, cu
);
10204 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10205 but otherwise compute it by typename_concat inside GDB.
10206 FIXME: Actually this is not really true, or at least not always true.
10207 It's all very confusing. compute_and_set_names doesn't try to demangle
10208 Fortran names because there is no mangling standard. So new_symbol
10209 will set the demangled name to the result of dwarf2_full_name, and it is
10210 the demangled name that GDB uses if it exists. */
10211 if (cu
->language
== language_ada
10212 || (cu
->language
== language_fortran
&& physname
))
10214 /* For Ada unit, we prefer the linkage name over the name, as
10215 the former contains the exported name, which the user expects
10216 to be able to reference. Ideally, we want the user to be able
10217 to reference this entity using either natural or linkage name,
10218 but we haven't started looking at this enhancement yet. */
10219 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10221 if (linkage_name
!= NULL
)
10222 return linkage_name
;
10225 /* These are the only languages we know how to qualify names in. */
10227 && (cu
->language
== language_cplus
10228 || cu
->language
== language_fortran
|| cu
->language
== language_d
10229 || cu
->language
== language_rust
))
10231 if (die_needs_namespace (die
, cu
))
10233 const char *prefix
;
10234 const char *canonical_name
= NULL
;
10238 prefix
= determine_prefix (die
, cu
);
10239 if (*prefix
!= '\0')
10241 gdb::unique_xmalloc_ptr
<char> prefixed_name
10242 (typename_concat (NULL
, prefix
, name
, physname
, cu
));
10244 buf
.puts (prefixed_name
.get ());
10249 /* Template parameters may be specified in the DIE's DW_AT_name, or
10250 as children with DW_TAG_template_type_param or
10251 DW_TAG_value_type_param. If the latter, add them to the name
10252 here. If the name already has template parameters, then
10253 skip this step; some versions of GCC emit both, and
10254 it is more efficient to use the pre-computed name.
10256 Something to keep in mind about this process: it is very
10257 unlikely, or in some cases downright impossible, to produce
10258 something that will match the mangled name of a function.
10259 If the definition of the function has the same debug info,
10260 we should be able to match up with it anyway. But fallbacks
10261 using the minimal symbol, for instance to find a method
10262 implemented in a stripped copy of libstdc++, will not work.
10263 If we do not have debug info for the definition, we will have to
10264 match them up some other way.
10266 When we do name matching there is a related problem with function
10267 templates; two instantiated function templates are allowed to
10268 differ only by their return types, which we do not add here. */
10270 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10272 struct attribute
*attr
;
10273 struct die_info
*child
;
10276 die
->building_fullname
= 1;
10278 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10282 const gdb_byte
*bytes
;
10283 struct dwarf2_locexpr_baton
*baton
;
10286 if (child
->tag
!= DW_TAG_template_type_param
10287 && child
->tag
!= DW_TAG_template_value_param
)
10298 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10301 complaint (_("template parameter missing DW_AT_type"));
10302 buf
.puts ("UNKNOWN_TYPE");
10305 type
= die_type (child
, cu
);
10307 if (child
->tag
== DW_TAG_template_type_param
)
10309 c_print_type (type
, "", &buf
, -1, 0, cu
->language
,
10310 &type_print_raw_options
);
10314 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10317 complaint (_("template parameter missing "
10318 "DW_AT_const_value"));
10319 buf
.puts ("UNKNOWN_VALUE");
10323 dwarf2_const_value_attr (attr
, type
, name
,
10324 &cu
->comp_unit_obstack
, cu
,
10325 &value
, &bytes
, &baton
);
10327 if (TYPE_NOSIGN (type
))
10328 /* GDB prints characters as NUMBER 'CHAR'. If that's
10329 changed, this can use value_print instead. */
10330 c_printchar (value
, type
, &buf
);
10333 struct value_print_options opts
;
10336 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10340 else if (bytes
!= NULL
)
10342 v
= allocate_value (type
);
10343 memcpy (value_contents_writeable (v
), bytes
,
10344 TYPE_LENGTH (type
));
10347 v
= value_from_longest (type
, value
);
10349 /* Specify decimal so that we do not depend on
10351 get_formatted_print_options (&opts
, 'd');
10353 value_print (v
, &buf
, &opts
);
10358 die
->building_fullname
= 0;
10362 /* Close the argument list, with a space if necessary
10363 (nested templates). */
10364 if (!buf
.empty () && buf
.string ().back () == '>')
10371 /* For C++ methods, append formal parameter type
10372 information, if PHYSNAME. */
10374 if (physname
&& die
->tag
== DW_TAG_subprogram
10375 && cu
->language
== language_cplus
)
10377 struct type
*type
= read_type_die (die
, cu
);
10379 c_type_print_args (type
, &buf
, 1, cu
->language
,
10380 &type_print_raw_options
);
10382 if (cu
->language
== language_cplus
)
10384 /* Assume that an artificial first parameter is
10385 "this", but do not crash if it is not. RealView
10386 marks unnamed (and thus unused) parameters as
10387 artificial; there is no way to differentiate
10389 if (type
->num_fields () > 0
10390 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10391 && TYPE_FIELD_TYPE (type
, 0)->code () == TYPE_CODE_PTR
10392 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10394 buf
.puts (" const");
10398 const std::string
&intermediate_name
= buf
.string ();
10400 if (cu
->language
== language_cplus
)
10402 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10405 /* If we only computed INTERMEDIATE_NAME, or if
10406 INTERMEDIATE_NAME is already canonical, then we need to
10408 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10409 name
= objfile
->intern (intermediate_name
);
10411 name
= canonical_name
;
10418 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10419 If scope qualifiers are appropriate they will be added. The result
10420 will be allocated on the storage_obstack, or NULL if the DIE does
10421 not have a name. NAME may either be from a previous call to
10422 dwarf2_name or NULL.
10424 The output string will be canonicalized (if C++). */
10426 static const char *
10427 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10429 return dwarf2_compute_name (name
, die
, cu
, 0);
10432 /* Construct a physname for the given DIE in CU. NAME may either be
10433 from a previous call to dwarf2_name or NULL. The result will be
10434 allocated on the objfile_objstack or NULL if the DIE does not have a
10437 The output string will be canonicalized (if C++). */
10439 static const char *
10440 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10442 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
10443 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10446 /* In this case dwarf2_compute_name is just a shortcut not building anything
10448 if (!die_needs_namespace (die
, cu
))
10449 return dwarf2_compute_name (name
, die
, cu
, 1);
10451 if (cu
->language
!= language_rust
)
10452 mangled
= dw2_linkage_name (die
, cu
);
10454 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
10456 gdb::unique_xmalloc_ptr
<char> demangled
;
10457 if (mangled
!= NULL
)
10460 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
10462 /* Do nothing (do not demangle the symbol name). */
10464 else if (cu
->language
== language_go
)
10466 /* This is a lie, but we already lie to the caller new_symbol.
10467 new_symbol assumes we return the mangled name.
10468 This just undoes that lie until things are cleaned up. */
10472 /* Use DMGL_RET_DROP for C++ template functions to suppress
10473 their return type. It is easier for GDB users to search
10474 for such functions as `name(params)' than `long name(params)'.
10475 In such case the minimal symbol names do not match the full
10476 symbol names but for template functions there is never a need
10477 to look up their definition from their declaration so
10478 the only disadvantage remains the minimal symbol variant
10479 `long name(params)' does not have the proper inferior type. */
10480 demangled
.reset (gdb_demangle (mangled
,
10481 (DMGL_PARAMS
| DMGL_ANSI
10482 | DMGL_RET_DROP
)));
10485 canon
= demangled
.get ();
10493 if (canon
== NULL
|| check_physname
)
10495 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
10497 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
10499 /* It may not mean a bug in GDB. The compiler could also
10500 compute DW_AT_linkage_name incorrectly. But in such case
10501 GDB would need to be bug-to-bug compatible. */
10503 complaint (_("Computed physname <%s> does not match demangled <%s> "
10504 "(from linkage <%s>) - DIE at %s [in module %s]"),
10505 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
10506 objfile_name (objfile
));
10508 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
10509 is available here - over computed PHYSNAME. It is safer
10510 against both buggy GDB and buggy compilers. */
10524 retval
= objfile
->intern (retval
);
10529 /* Inspect DIE in CU for a namespace alias. If one exists, record
10530 a new symbol for it.
10532 Returns 1 if a namespace alias was recorded, 0 otherwise. */
10535 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
10537 struct attribute
*attr
;
10539 /* If the die does not have a name, this is not a namespace
10541 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
10545 struct die_info
*d
= die
;
10546 struct dwarf2_cu
*imported_cu
= cu
;
10548 /* If the compiler has nested DW_AT_imported_declaration DIEs,
10549 keep inspecting DIEs until we hit the underlying import. */
10550 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
10551 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
10553 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
10557 d
= follow_die_ref (d
, attr
, &imported_cu
);
10558 if (d
->tag
!= DW_TAG_imported_declaration
)
10562 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
10564 complaint (_("DIE at %s has too many recursively imported "
10565 "declarations"), sect_offset_str (d
->sect_off
));
10572 sect_offset sect_off
= attr
->get_ref_die_offset ();
10574 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
10575 if (type
!= NULL
&& type
->code () == TYPE_CODE_NAMESPACE
)
10577 /* This declaration is a global namespace alias. Add
10578 a symbol for it whose type is the aliased namespace. */
10579 new_symbol (die
, type
, cu
);
10588 /* Return the using directives repository (global or local?) to use in the
10589 current context for CU.
10591 For Ada, imported declarations can materialize renamings, which *may* be
10592 global. However it is impossible (for now?) in DWARF to distinguish
10593 "external" imported declarations and "static" ones. As all imported
10594 declarations seem to be static in all other languages, make them all CU-wide
10595 global only in Ada. */
10597 static struct using_direct
**
10598 using_directives (struct dwarf2_cu
*cu
)
10600 if (cu
->language
== language_ada
10601 && cu
->get_builder ()->outermost_context_p ())
10602 return cu
->get_builder ()->get_global_using_directives ();
10604 return cu
->get_builder ()->get_local_using_directives ();
10607 /* Read the import statement specified by the given die and record it. */
10610 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
10612 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
10613 struct attribute
*import_attr
;
10614 struct die_info
*imported_die
, *child_die
;
10615 struct dwarf2_cu
*imported_cu
;
10616 const char *imported_name
;
10617 const char *imported_name_prefix
;
10618 const char *canonical_name
;
10619 const char *import_alias
;
10620 const char *imported_declaration
= NULL
;
10621 const char *import_prefix
;
10622 std::vector
<const char *> excludes
;
10624 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10625 if (import_attr
== NULL
)
10627 complaint (_("Tag '%s' has no DW_AT_import"),
10628 dwarf_tag_name (die
->tag
));
10633 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
10634 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10635 if (imported_name
== NULL
)
10637 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
10639 The import in the following code:
10653 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
10654 <52> DW_AT_decl_file : 1
10655 <53> DW_AT_decl_line : 6
10656 <54> DW_AT_import : <0x75>
10657 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
10658 <59> DW_AT_name : B
10659 <5b> DW_AT_decl_file : 1
10660 <5c> DW_AT_decl_line : 2
10661 <5d> DW_AT_type : <0x6e>
10663 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
10664 <76> DW_AT_byte_size : 4
10665 <77> DW_AT_encoding : 5 (signed)
10667 imports the wrong die ( 0x75 instead of 0x58 ).
10668 This case will be ignored until the gcc bug is fixed. */
10672 /* Figure out the local name after import. */
10673 import_alias
= dwarf2_name (die
, cu
);
10675 /* Figure out where the statement is being imported to. */
10676 import_prefix
= determine_prefix (die
, cu
);
10678 /* Figure out what the scope of the imported die is and prepend it
10679 to the name of the imported die. */
10680 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
10682 if (imported_die
->tag
!= DW_TAG_namespace
10683 && imported_die
->tag
!= DW_TAG_module
)
10685 imported_declaration
= imported_name
;
10686 canonical_name
= imported_name_prefix
;
10688 else if (strlen (imported_name_prefix
) > 0)
10689 canonical_name
= obconcat (&objfile
->objfile_obstack
,
10690 imported_name_prefix
,
10691 (cu
->language
== language_d
? "." : "::"),
10692 imported_name
, (char *) NULL
);
10694 canonical_name
= imported_name
;
10696 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
10697 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
10698 child_die
= child_die
->sibling
)
10700 /* DWARF-4: A Fortran use statement with a “rename list” may be
10701 represented by an imported module entry with an import attribute
10702 referring to the module and owned entries corresponding to those
10703 entities that are renamed as part of being imported. */
10705 if (child_die
->tag
!= DW_TAG_imported_declaration
)
10707 complaint (_("child DW_TAG_imported_declaration expected "
10708 "- DIE at %s [in module %s]"),
10709 sect_offset_str (child_die
->sect_off
),
10710 objfile_name (objfile
));
10714 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
10715 if (import_attr
== NULL
)
10717 complaint (_("Tag '%s' has no DW_AT_import"),
10718 dwarf_tag_name (child_die
->tag
));
10723 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
10725 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10726 if (imported_name
== NULL
)
10728 complaint (_("child DW_TAG_imported_declaration has unknown "
10729 "imported name - DIE at %s [in module %s]"),
10730 sect_offset_str (child_die
->sect_off
),
10731 objfile_name (objfile
));
10735 excludes
.push_back (imported_name
);
10737 process_die (child_die
, cu
);
10740 add_using_directive (using_directives (cu
),
10744 imported_declaration
,
10747 &objfile
->objfile_obstack
);
10750 /* ICC<14 does not output the required DW_AT_declaration on incomplete
10751 types, but gives them a size of zero. Starting with version 14,
10752 ICC is compatible with GCC. */
10755 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
10757 if (!cu
->checked_producer
)
10758 check_producer (cu
);
10760 return cu
->producer_is_icc_lt_14
;
10763 /* ICC generates a DW_AT_type for C void functions. This was observed on
10764 ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2)
10765 which says that void functions should not have a DW_AT_type. */
10768 producer_is_icc (struct dwarf2_cu
*cu
)
10770 if (!cu
->checked_producer
)
10771 check_producer (cu
);
10773 return cu
->producer_is_icc
;
10776 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
10777 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
10778 this, it was first present in GCC release 4.3.0. */
10781 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
10783 if (!cu
->checked_producer
)
10784 check_producer (cu
);
10786 return cu
->producer_is_gcc_lt_4_3
;
10789 static file_and_directory
10790 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
10792 file_and_directory res
;
10794 /* Find the filename. Do not use dwarf2_name here, since the filename
10795 is not a source language identifier. */
10796 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
10797 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
10799 if (res
.comp_dir
== NULL
10800 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
10801 && IS_ABSOLUTE_PATH (res
.name
))
10803 res
.comp_dir_storage
= ldirname (res
.name
);
10804 if (!res
.comp_dir_storage
.empty ())
10805 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
10807 if (res
.comp_dir
!= NULL
)
10809 /* Irix 6.2 native cc prepends <machine>.: to the compilation
10810 directory, get rid of it. */
10811 const char *cp
= strchr (res
.comp_dir
, ':');
10813 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
10814 res
.comp_dir
= cp
+ 1;
10817 if (res
.name
== NULL
)
10818 res
.name
= "<unknown>";
10823 /* Handle DW_AT_stmt_list for a compilation unit.
10824 DIE is the DW_TAG_compile_unit die for CU.
10825 COMP_DIR is the compilation directory. LOWPC is passed to
10826 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
10829 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
10830 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
10832 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
10833 struct attribute
*attr
;
10834 struct line_header line_header_local
;
10835 hashval_t line_header_local_hash
;
10837 int decode_mapping
;
10839 gdb_assert (! cu
->per_cu
->is_debug_types
);
10841 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
10845 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
10847 /* The line header hash table is only created if needed (it exists to
10848 prevent redundant reading of the line table for partial_units).
10849 If we're given a partial_unit, we'll need it. If we're given a
10850 compile_unit, then use the line header hash table if it's already
10851 created, but don't create one just yet. */
10853 if (dwarf2_per_objfile
->per_bfd
->line_header_hash
== NULL
10854 && die
->tag
== DW_TAG_partial_unit
)
10856 dwarf2_per_objfile
->per_bfd
->line_header_hash
10857 .reset (htab_create_alloc (127, line_header_hash_voidp
,
10858 line_header_eq_voidp
,
10859 free_line_header_voidp
,
10863 line_header_local
.sect_off
= line_offset
;
10864 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
10865 line_header_local_hash
= line_header_hash (&line_header_local
);
10866 if (dwarf2_per_objfile
->per_bfd
->line_header_hash
!= NULL
)
10868 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->per_bfd
->line_header_hash
.get (),
10869 &line_header_local
,
10870 line_header_local_hash
, NO_INSERT
);
10872 /* For DW_TAG_compile_unit we need info like symtab::linetable which
10873 is not present in *SLOT (since if there is something in *SLOT then
10874 it will be for a partial_unit). */
10875 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
10877 gdb_assert (*slot
!= NULL
);
10878 cu
->line_header
= (struct line_header
*) *slot
;
10883 /* dwarf_decode_line_header does not yet provide sufficient information.
10884 We always have to call also dwarf_decode_lines for it. */
10885 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
10889 cu
->line_header
= lh
.release ();
10890 cu
->line_header_die_owner
= die
;
10892 if (dwarf2_per_objfile
->per_bfd
->line_header_hash
== NULL
)
10896 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->per_bfd
->line_header_hash
.get (),
10897 &line_header_local
,
10898 line_header_local_hash
, INSERT
);
10899 gdb_assert (slot
!= NULL
);
10901 if (slot
!= NULL
&& *slot
== NULL
)
10903 /* This newly decoded line number information unit will be owned
10904 by line_header_hash hash table. */
10905 *slot
= cu
->line_header
;
10906 cu
->line_header_die_owner
= NULL
;
10910 /* We cannot free any current entry in (*slot) as that struct line_header
10911 may be already used by multiple CUs. Create only temporary decoded
10912 line_header for this CU - it may happen at most once for each line
10913 number information unit. And if we're not using line_header_hash
10914 then this is what we want as well. */
10915 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
10917 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
10918 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
10923 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
10926 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
10928 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
10929 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10930 struct gdbarch
*gdbarch
= objfile
->arch ();
10931 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
10932 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
10933 struct attribute
*attr
;
10934 struct die_info
*child_die
;
10935 CORE_ADDR baseaddr
;
10937 prepare_one_comp_unit (cu
, die
, cu
->language
);
10938 baseaddr
= objfile
->text_section_offset ();
10940 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
10942 /* If we didn't find a lowpc, set it to highpc to avoid complaints
10943 from finish_block. */
10944 if (lowpc
== ((CORE_ADDR
) -1))
10946 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
10948 file_and_directory fnd
= find_file_and_directory (die
, cu
);
10950 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
10951 standardised yet. As a workaround for the language detection we fall
10952 back to the DW_AT_producer string. */
10953 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
10954 cu
->language
= language_opencl
;
10956 /* Similar hack for Go. */
10957 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
10958 set_cu_language (DW_LANG_Go
, cu
);
10960 cu
->start_symtab (fnd
.name
, fnd
.comp_dir
, lowpc
);
10962 /* Decode line number information if present. We do this before
10963 processing child DIEs, so that the line header table is available
10964 for DW_AT_decl_file. */
10965 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
10967 /* Process all dies in compilation unit. */
10968 if (die
->child
!= NULL
)
10970 child_die
= die
->child
;
10971 while (child_die
&& child_die
->tag
)
10973 process_die (child_die
, cu
);
10974 child_die
= child_die
->sibling
;
10978 /* Decode macro information, if present. Dwarf 2 macro information
10979 refers to information in the line number info statement program
10980 header, so we can only read it if we've read the header
10982 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
10984 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
10985 if (attr
&& cu
->line_header
)
10987 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
10988 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
10990 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
10994 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
10995 if (attr
&& cu
->line_header
)
10997 unsigned int macro_offset
= DW_UNSND (attr
);
10999 dwarf_decode_macros (cu
, macro_offset
, 0);
11005 dwarf2_cu::setup_type_unit_groups (struct die_info
*die
)
11007 struct type_unit_group
*tu_group
;
11009 struct attribute
*attr
;
11011 struct signatured_type
*sig_type
;
11013 gdb_assert (per_cu
->is_debug_types
);
11014 sig_type
= (struct signatured_type
*) per_cu
;
11016 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, this);
11018 /* If we're using .gdb_index (includes -readnow) then
11019 per_cu->type_unit_group may not have been set up yet. */
11020 if (sig_type
->type_unit_group
== NULL
)
11021 sig_type
->type_unit_group
= get_type_unit_group (this, attr
);
11022 tu_group
= sig_type
->type_unit_group
;
11024 /* If we've already processed this stmt_list there's no real need to
11025 do it again, we could fake it and just recreate the part we need
11026 (file name,index -> symtab mapping). If data shows this optimization
11027 is useful we can do it then. */
11028 first_time
= tu_group
->compunit_symtab
== NULL
;
11030 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11035 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11036 lh
= dwarf_decode_line_header (line_offset
, this);
11041 start_symtab ("", NULL
, 0);
11044 gdb_assert (tu_group
->symtabs
== NULL
);
11045 gdb_assert (m_builder
== nullptr);
11046 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11047 m_builder
.reset (new struct buildsym_compunit
11048 (COMPUNIT_OBJFILE (cust
), "",
11049 COMPUNIT_DIRNAME (cust
),
11050 compunit_language (cust
),
11052 list_in_scope
= get_builder ()->get_file_symbols ();
11057 line_header
= lh
.release ();
11058 line_header_die_owner
= die
;
11062 struct compunit_symtab
*cust
= start_symtab ("", NULL
, 0);
11064 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11065 still initializing it, and our caller (a few levels up)
11066 process_full_type_unit still needs to know if this is the first
11070 = XOBNEWVEC (&COMPUNIT_OBJFILE (cust
)->objfile_obstack
,
11071 struct symtab
*, line_header
->file_names_size ());
11073 auto &file_names
= line_header
->file_names ();
11074 for (i
= 0; i
< file_names
.size (); ++i
)
11076 file_entry
&fe
= file_names
[i
];
11077 dwarf2_start_subfile (this, fe
.name
,
11078 fe
.include_dir (line_header
));
11079 buildsym_compunit
*b
= get_builder ();
11080 if (b
->get_current_subfile ()->symtab
== NULL
)
11082 /* NOTE: start_subfile will recognize when it's been
11083 passed a file it has already seen. So we can't
11084 assume there's a simple mapping from
11085 cu->line_header->file_names to subfiles, plus
11086 cu->line_header->file_names may contain dups. */
11087 b
->get_current_subfile ()->symtab
11088 = allocate_symtab (cust
, b
->get_current_subfile ()->name
);
11091 fe
.symtab
= b
->get_current_subfile ()->symtab
;
11092 tu_group
->symtabs
[i
] = fe
.symtab
;
11097 gdb_assert (m_builder
== nullptr);
11098 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11099 m_builder
.reset (new struct buildsym_compunit
11100 (COMPUNIT_OBJFILE (cust
), "",
11101 COMPUNIT_DIRNAME (cust
),
11102 compunit_language (cust
),
11104 list_in_scope
= get_builder ()->get_file_symbols ();
11106 auto &file_names
= line_header
->file_names ();
11107 for (i
= 0; i
< file_names
.size (); ++i
)
11109 file_entry
&fe
= file_names
[i
];
11110 fe
.symtab
= tu_group
->symtabs
[i
];
11114 /* The main symtab is allocated last. Type units don't have DW_AT_name
11115 so they don't have a "real" (so to speak) symtab anyway.
11116 There is later code that will assign the main symtab to all symbols
11117 that don't have one. We need to handle the case of a symbol with a
11118 missing symtab (DW_AT_decl_file) anyway. */
11121 /* Process DW_TAG_type_unit.
11122 For TUs we want to skip the first top level sibling if it's not the
11123 actual type being defined by this TU. In this case the first top
11124 level sibling is there to provide context only. */
11127 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11129 struct die_info
*child_die
;
11131 prepare_one_comp_unit (cu
, die
, language_minimal
);
11133 /* Initialize (or reinitialize) the machinery for building symtabs.
11134 We do this before processing child DIEs, so that the line header table
11135 is available for DW_AT_decl_file. */
11136 cu
->setup_type_unit_groups (die
);
11138 if (die
->child
!= NULL
)
11140 child_die
= die
->child
;
11141 while (child_die
&& child_die
->tag
)
11143 process_die (child_die
, cu
);
11144 child_die
= child_die
->sibling
;
11151 http://gcc.gnu.org/wiki/DebugFission
11152 http://gcc.gnu.org/wiki/DebugFissionDWP
11154 To simplify handling of both DWO files ("object" files with the DWARF info)
11155 and DWP files (a file with the DWOs packaged up into one file), we treat
11156 DWP files as having a collection of virtual DWO files. */
11159 hash_dwo_file (const void *item
)
11161 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11164 hash
= htab_hash_string (dwo_file
->dwo_name
);
11165 if (dwo_file
->comp_dir
!= NULL
)
11166 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11171 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11173 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11174 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11176 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11178 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11179 return lhs
->comp_dir
== rhs
->comp_dir
;
11180 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11183 /* Allocate a hash table for DWO files. */
11186 allocate_dwo_file_hash_table ()
11188 auto delete_dwo_file
= [] (void *item
)
11190 struct dwo_file
*dwo_file
= (struct dwo_file
*) item
;
11195 return htab_up (htab_create_alloc (41,
11202 /* Lookup DWO file DWO_NAME. */
11205 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11206 const char *dwo_name
,
11207 const char *comp_dir
)
11209 struct dwo_file find_entry
;
11212 if (dwarf2_per_objfile
->per_bfd
->dwo_files
== NULL
)
11213 dwarf2_per_objfile
->per_bfd
->dwo_files
= allocate_dwo_file_hash_table ();
11215 find_entry
.dwo_name
= dwo_name
;
11216 find_entry
.comp_dir
= comp_dir
;
11217 slot
= htab_find_slot (dwarf2_per_objfile
->per_bfd
->dwo_files
.get (), &find_entry
,
11224 hash_dwo_unit (const void *item
)
11226 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11228 /* This drops the top 32 bits of the id, but is ok for a hash. */
11229 return dwo_unit
->signature
;
11233 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11235 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11236 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11238 /* The signature is assumed to be unique within the DWO file.
11239 So while object file CU dwo_id's always have the value zero,
11240 that's OK, assuming each object file DWO file has only one CU,
11241 and that's the rule for now. */
11242 return lhs
->signature
== rhs
->signature
;
11245 /* Allocate a hash table for DWO CUs,TUs.
11246 There is one of these tables for each of CUs,TUs for each DWO file. */
11249 allocate_dwo_unit_table ()
11251 /* Start out with a pretty small number.
11252 Generally DWO files contain only one CU and maybe some TUs. */
11253 return htab_up (htab_create_alloc (3,
11256 NULL
, xcalloc
, xfree
));
11259 /* die_reader_func for create_dwo_cu. */
11262 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11263 const gdb_byte
*info_ptr
,
11264 struct die_info
*comp_unit_die
,
11265 struct dwo_file
*dwo_file
,
11266 struct dwo_unit
*dwo_unit
)
11268 struct dwarf2_cu
*cu
= reader
->cu
;
11269 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11270 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11272 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
11273 if (!signature
.has_value ())
11275 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11276 " its dwo_id [in module %s]"),
11277 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11281 dwo_unit
->dwo_file
= dwo_file
;
11282 dwo_unit
->signature
= *signature
;
11283 dwo_unit
->section
= section
;
11284 dwo_unit
->sect_off
= sect_off
;
11285 dwo_unit
->length
= cu
->per_cu
->length
;
11287 if (dwarf_read_debug
)
11288 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11289 sect_offset_str (sect_off
),
11290 hex_string (dwo_unit
->signature
));
11293 /* Create the dwo_units for the CUs in a DWO_FILE.
11294 Note: This function processes DWO files only, not DWP files. */
11297 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11298 dwarf2_cu
*cu
, struct dwo_file
&dwo_file
,
11299 dwarf2_section_info
§ion
, htab_up
&cus_htab
)
11301 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11302 dwarf2_per_bfd
*per_bfd
= dwarf2_per_objfile
->per_bfd
;
11303 const gdb_byte
*info_ptr
, *end_ptr
;
11305 section
.read (objfile
);
11306 info_ptr
= section
.buffer
;
11308 if (info_ptr
== NULL
)
11311 if (dwarf_read_debug
)
11313 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11314 section
.get_name (),
11315 section
.get_file_name ());
11318 end_ptr
= info_ptr
+ section
.size
;
11319 while (info_ptr
< end_ptr
)
11321 struct dwarf2_per_cu_data per_cu
;
11322 struct dwo_unit read_unit
{};
11323 struct dwo_unit
*dwo_unit
;
11325 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11327 memset (&per_cu
, 0, sizeof (per_cu
));
11328 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11329 per_cu
.per_bfd
= per_bfd
;
11330 per_cu
.is_debug_types
= 0;
11331 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11332 per_cu
.section
= §ion
;
11334 cutu_reader
reader (&per_cu
, dwarf2_per_objfile
, cu
, &dwo_file
);
11335 if (!reader
.dummy_p
)
11336 create_dwo_cu_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
,
11337 &dwo_file
, &read_unit
);
11338 info_ptr
+= per_cu
.length
;
11340 // If the unit could not be parsed, skip it.
11341 if (read_unit
.dwo_file
== NULL
)
11344 if (cus_htab
== NULL
)
11345 cus_htab
= allocate_dwo_unit_table ();
11347 dwo_unit
= OBSTACK_ZALLOC (&per_bfd
->obstack
,
11349 *dwo_unit
= read_unit
;
11350 slot
= htab_find_slot (cus_htab
.get (), dwo_unit
, INSERT
);
11351 gdb_assert (slot
!= NULL
);
11354 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11355 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11357 complaint (_("debug cu entry at offset %s is duplicate to"
11358 " the entry at offset %s, signature %s"),
11359 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11360 hex_string (dwo_unit
->signature
));
11362 *slot
= (void *)dwo_unit
;
11366 /* DWP file .debug_{cu,tu}_index section format:
11367 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11371 Both index sections have the same format, and serve to map a 64-bit
11372 signature to a set of section numbers. Each section begins with a header,
11373 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11374 indexes, and a pool of 32-bit section numbers. The index sections will be
11375 aligned at 8-byte boundaries in the file.
11377 The index section header consists of:
11379 V, 32 bit version number
11381 N, 32 bit number of compilation units or type units in the index
11382 M, 32 bit number of slots in the hash table
11384 Numbers are recorded using the byte order of the application binary.
11386 The hash table begins at offset 16 in the section, and consists of an array
11387 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11388 order of the application binary). Unused slots in the hash table are 0.
11389 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11391 The parallel table begins immediately after the hash table
11392 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11393 array of 32-bit indexes (using the byte order of the application binary),
11394 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11395 table contains a 32-bit index into the pool of section numbers. For unused
11396 hash table slots, the corresponding entry in the parallel table will be 0.
11398 The pool of section numbers begins immediately following the hash table
11399 (at offset 16 + 12 * M from the beginning of the section). The pool of
11400 section numbers consists of an array of 32-bit words (using the byte order
11401 of the application binary). Each item in the array is indexed starting
11402 from 0. The hash table entry provides the index of the first section
11403 number in the set. Additional section numbers in the set follow, and the
11404 set is terminated by a 0 entry (section number 0 is not used in ELF).
11406 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11407 section must be the first entry in the set, and the .debug_abbrev.dwo must
11408 be the second entry. Other members of the set may follow in any order.
11414 DWP Version 2 combines all the .debug_info, etc. sections into one,
11415 and the entries in the index tables are now offsets into these sections.
11416 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11419 Index Section Contents:
11421 Hash Table of Signatures dwp_hash_table.hash_table
11422 Parallel Table of Indices dwp_hash_table.unit_table
11423 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
11424 Table of Section Sizes dwp_hash_table.v2.sizes
11426 The index section header consists of:
11428 V, 32 bit version number
11429 L, 32 bit number of columns in the table of section offsets
11430 N, 32 bit number of compilation units or type units in the index
11431 M, 32 bit number of slots in the hash table
11433 Numbers are recorded using the byte order of the application binary.
11435 The hash table has the same format as version 1.
11436 The parallel table of indices has the same format as version 1,
11437 except that the entries are origin-1 indices into the table of sections
11438 offsets and the table of section sizes.
11440 The table of offsets begins immediately following the parallel table
11441 (at offset 16 + 12 * M from the beginning of the section). The table is
11442 a two-dimensional array of 32-bit words (using the byte order of the
11443 application binary), with L columns and N+1 rows, in row-major order.
11444 Each row in the array is indexed starting from 0. The first row provides
11445 a key to the remaining rows: each column in this row provides an identifier
11446 for a debug section, and the offsets in the same column of subsequent rows
11447 refer to that section. The section identifiers are:
11449 DW_SECT_INFO 1 .debug_info.dwo
11450 DW_SECT_TYPES 2 .debug_types.dwo
11451 DW_SECT_ABBREV 3 .debug_abbrev.dwo
11452 DW_SECT_LINE 4 .debug_line.dwo
11453 DW_SECT_LOC 5 .debug_loc.dwo
11454 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
11455 DW_SECT_MACINFO 7 .debug_macinfo.dwo
11456 DW_SECT_MACRO 8 .debug_macro.dwo
11458 The offsets provided by the CU and TU index sections are the base offsets
11459 for the contributions made by each CU or TU to the corresponding section
11460 in the package file. Each CU and TU header contains an abbrev_offset
11461 field, used to find the abbreviations table for that CU or TU within the
11462 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
11463 be interpreted as relative to the base offset given in the index section.
11464 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
11465 should be interpreted as relative to the base offset for .debug_line.dwo,
11466 and offsets into other debug sections obtained from DWARF attributes should
11467 also be interpreted as relative to the corresponding base offset.
11469 The table of sizes begins immediately following the table of offsets.
11470 Like the table of offsets, it is a two-dimensional array of 32-bit words,
11471 with L columns and N rows, in row-major order. Each row in the array is
11472 indexed starting from 1 (row 0 is shared by the two tables).
11476 Hash table lookup is handled the same in version 1 and 2:
11478 We assume that N and M will not exceed 2^32 - 1.
11479 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
11481 Given a 64-bit compilation unit signature or a type signature S, an entry
11482 in the hash table is located as follows:
11484 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
11485 the low-order k bits all set to 1.
11487 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
11489 3) If the hash table entry at index H matches the signature, use that
11490 entry. If the hash table entry at index H is unused (all zeroes),
11491 terminate the search: the signature is not present in the table.
11493 4) Let H = (H + H') modulo M. Repeat at Step 3.
11495 Because M > N and H' and M are relatively prime, the search is guaranteed
11496 to stop at an unused slot or find the match. */
11498 /* Create a hash table to map DWO IDs to their CU/TU entry in
11499 .debug_{info,types}.dwo in DWP_FILE.
11500 Returns NULL if there isn't one.
11501 Note: This function processes DWP files only, not DWO files. */
11503 static struct dwp_hash_table
*
11504 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11505 struct dwp_file
*dwp_file
, int is_debug_types
)
11507 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11508 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11509 const gdb_byte
*index_ptr
, *index_end
;
11510 struct dwarf2_section_info
*index
;
11511 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
11512 struct dwp_hash_table
*htab
;
11514 if (is_debug_types
)
11515 index
= &dwp_file
->sections
.tu_index
;
11517 index
= &dwp_file
->sections
.cu_index
;
11519 if (index
->empty ())
11521 index
->read (objfile
);
11523 index_ptr
= index
->buffer
;
11524 index_end
= index_ptr
+ index
->size
;
11526 version
= read_4_bytes (dbfd
, index_ptr
);
11529 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
11533 nr_units
= read_4_bytes (dbfd
, index_ptr
);
11535 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
11538 if (version
!= 1 && version
!= 2)
11540 error (_("Dwarf Error: unsupported DWP file version (%s)"
11541 " [in module %s]"),
11542 pulongest (version
), dwp_file
->name
);
11544 if (nr_slots
!= (nr_slots
& -nr_slots
))
11546 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
11547 " is not power of 2 [in module %s]"),
11548 pulongest (nr_slots
), dwp_file
->name
);
11551 htab
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
, struct dwp_hash_table
);
11552 htab
->version
= version
;
11553 htab
->nr_columns
= nr_columns
;
11554 htab
->nr_units
= nr_units
;
11555 htab
->nr_slots
= nr_slots
;
11556 htab
->hash_table
= index_ptr
;
11557 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
11559 /* Exit early if the table is empty. */
11560 if (nr_slots
== 0 || nr_units
== 0
11561 || (version
== 2 && nr_columns
== 0))
11563 /* All must be zero. */
11564 if (nr_slots
!= 0 || nr_units
!= 0
11565 || (version
== 2 && nr_columns
!= 0))
11567 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
11568 " all zero [in modules %s]"),
11576 htab
->section_pool
.v1
.indices
=
11577 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11578 /* It's harder to decide whether the section is too small in v1.
11579 V1 is deprecated anyway so we punt. */
11583 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11584 int *ids
= htab
->section_pool
.v2
.section_ids
;
11585 size_t sizeof_ids
= sizeof (htab
->section_pool
.v2
.section_ids
);
11586 /* Reverse map for error checking. */
11587 int ids_seen
[DW_SECT_MAX
+ 1];
11590 if (nr_columns
< 2)
11592 error (_("Dwarf Error: bad DWP hash table, too few columns"
11593 " in section table [in module %s]"),
11596 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
11598 error (_("Dwarf Error: bad DWP hash table, too many columns"
11599 " in section table [in module %s]"),
11602 memset (ids
, 255, sizeof_ids
);
11603 memset (ids_seen
, 255, sizeof (ids_seen
));
11604 for (i
= 0; i
< nr_columns
; ++i
)
11606 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
11608 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
11610 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
11611 " in section table [in module %s]"),
11612 id
, dwp_file
->name
);
11614 if (ids_seen
[id
] != -1)
11616 error (_("Dwarf Error: bad DWP hash table, duplicate section"
11617 " id %d in section table [in module %s]"),
11618 id
, dwp_file
->name
);
11623 /* Must have exactly one info or types section. */
11624 if (((ids_seen
[DW_SECT_INFO
] != -1)
11625 + (ids_seen
[DW_SECT_TYPES
] != -1))
11628 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
11629 " DWO info/types section [in module %s]"),
11632 /* Must have an abbrev section. */
11633 if (ids_seen
[DW_SECT_ABBREV
] == -1)
11635 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
11636 " section [in module %s]"),
11639 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
11640 htab
->section_pool
.v2
.sizes
=
11641 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
11642 * nr_units
* nr_columns
);
11643 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
11644 * nr_units
* nr_columns
))
11647 error (_("Dwarf Error: DWP index section is corrupt (too small)"
11648 " [in module %s]"),
11656 /* Update SECTIONS with the data from SECTP.
11658 This function is like the other "locate" section routines that are
11659 passed to bfd_map_over_sections, but in this context the sections to
11660 read comes from the DWP V1 hash table, not the full ELF section table.
11662 The result is non-zero for success, or zero if an error was found. */
11665 locate_v1_virtual_dwo_sections (asection
*sectp
,
11666 struct virtual_v1_dwo_sections
*sections
)
11668 const struct dwop_section_names
*names
= &dwop_section_names
;
11670 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
11672 /* There can be only one. */
11673 if (sections
->abbrev
.s
.section
!= NULL
)
11675 sections
->abbrev
.s
.section
= sectp
;
11676 sections
->abbrev
.size
= bfd_section_size (sectp
);
11678 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
11679 || section_is_p (sectp
->name
, &names
->types_dwo
))
11681 /* There can be only one. */
11682 if (sections
->info_or_types
.s
.section
!= NULL
)
11684 sections
->info_or_types
.s
.section
= sectp
;
11685 sections
->info_or_types
.size
= bfd_section_size (sectp
);
11687 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11689 /* There can be only one. */
11690 if (sections
->line
.s
.section
!= NULL
)
11692 sections
->line
.s
.section
= sectp
;
11693 sections
->line
.size
= bfd_section_size (sectp
);
11695 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11697 /* There can be only one. */
11698 if (sections
->loc
.s
.section
!= NULL
)
11700 sections
->loc
.s
.section
= sectp
;
11701 sections
->loc
.size
= bfd_section_size (sectp
);
11703 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11705 /* There can be only one. */
11706 if (sections
->macinfo
.s
.section
!= NULL
)
11708 sections
->macinfo
.s
.section
= sectp
;
11709 sections
->macinfo
.size
= bfd_section_size (sectp
);
11711 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11713 /* There can be only one. */
11714 if (sections
->macro
.s
.section
!= NULL
)
11716 sections
->macro
.s
.section
= sectp
;
11717 sections
->macro
.size
= bfd_section_size (sectp
);
11719 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11721 /* There can be only one. */
11722 if (sections
->str_offsets
.s
.section
!= NULL
)
11724 sections
->str_offsets
.s
.section
= sectp
;
11725 sections
->str_offsets
.size
= bfd_section_size (sectp
);
11729 /* No other kind of section is valid. */
11736 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11737 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11738 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11739 This is for DWP version 1 files. */
11741 static struct dwo_unit
*
11742 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11743 struct dwp_file
*dwp_file
,
11744 uint32_t unit_index
,
11745 const char *comp_dir
,
11746 ULONGEST signature
, int is_debug_types
)
11748 const struct dwp_hash_table
*dwp_htab
=
11749 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11750 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11751 const char *kind
= is_debug_types
? "TU" : "CU";
11752 struct dwo_file
*dwo_file
;
11753 struct dwo_unit
*dwo_unit
;
11754 struct virtual_v1_dwo_sections sections
;
11755 void **dwo_file_slot
;
11758 gdb_assert (dwp_file
->version
== 1);
11760 if (dwarf_read_debug
)
11762 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
11764 pulongest (unit_index
), hex_string (signature
),
11768 /* Fetch the sections of this DWO unit.
11769 Put a limit on the number of sections we look for so that bad data
11770 doesn't cause us to loop forever. */
11772 #define MAX_NR_V1_DWO_SECTIONS \
11773 (1 /* .debug_info or .debug_types */ \
11774 + 1 /* .debug_abbrev */ \
11775 + 1 /* .debug_line */ \
11776 + 1 /* .debug_loc */ \
11777 + 1 /* .debug_str_offsets */ \
11778 + 1 /* .debug_macro or .debug_macinfo */ \
11779 + 1 /* trailing zero */)
11781 memset (§ions
, 0, sizeof (sections
));
11783 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
11786 uint32_t section_nr
=
11787 read_4_bytes (dbfd
,
11788 dwp_htab
->section_pool
.v1
.indices
11789 + (unit_index
+ i
) * sizeof (uint32_t));
11791 if (section_nr
== 0)
11793 if (section_nr
>= dwp_file
->num_sections
)
11795 error (_("Dwarf Error: bad DWP hash table, section number too large"
11796 " [in module %s]"),
11800 sectp
= dwp_file
->elf_sections
[section_nr
];
11801 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
11803 error (_("Dwarf Error: bad DWP hash table, invalid section found"
11804 " [in module %s]"),
11810 || sections
.info_or_types
.empty ()
11811 || sections
.abbrev
.empty ())
11813 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
11814 " [in module %s]"),
11817 if (i
== MAX_NR_V1_DWO_SECTIONS
)
11819 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
11820 " [in module %s]"),
11824 /* It's easier for the rest of the code if we fake a struct dwo_file and
11825 have dwo_unit "live" in that. At least for now.
11827 The DWP file can be made up of a random collection of CUs and TUs.
11828 However, for each CU + set of TUs that came from the same original DWO
11829 file, we can combine them back into a virtual DWO file to save space
11830 (fewer struct dwo_file objects to allocate). Remember that for really
11831 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
11833 std::string virtual_dwo_name
=
11834 string_printf ("virtual-dwo/%d-%d-%d-%d",
11835 sections
.abbrev
.get_id (),
11836 sections
.line
.get_id (),
11837 sections
.loc
.get_id (),
11838 sections
.str_offsets
.get_id ());
11839 /* Can we use an existing virtual DWO file? */
11840 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
11841 virtual_dwo_name
.c_str (),
11843 /* Create one if necessary. */
11844 if (*dwo_file_slot
== NULL
)
11846 if (dwarf_read_debug
)
11848 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
11849 virtual_dwo_name
.c_str ());
11851 dwo_file
= new struct dwo_file
;
11852 dwo_file
->dwo_name
= dwarf2_per_objfile
->objfile
->intern (virtual_dwo_name
);
11853 dwo_file
->comp_dir
= comp_dir
;
11854 dwo_file
->sections
.abbrev
= sections
.abbrev
;
11855 dwo_file
->sections
.line
= sections
.line
;
11856 dwo_file
->sections
.loc
= sections
.loc
;
11857 dwo_file
->sections
.macinfo
= sections
.macinfo
;
11858 dwo_file
->sections
.macro
= sections
.macro
;
11859 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
11860 /* The "str" section is global to the entire DWP file. */
11861 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
11862 /* The info or types section is assigned below to dwo_unit,
11863 there's no need to record it in dwo_file.
11864 Also, we can't simply record type sections in dwo_file because
11865 we record a pointer into the vector in dwo_unit. As we collect more
11866 types we'll grow the vector and eventually have to reallocate space
11867 for it, invalidating all copies of pointers into the previous
11869 *dwo_file_slot
= dwo_file
;
11873 if (dwarf_read_debug
)
11875 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
11876 virtual_dwo_name
.c_str ());
11878 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
11881 dwo_unit
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
, struct dwo_unit
);
11882 dwo_unit
->dwo_file
= dwo_file
;
11883 dwo_unit
->signature
= signature
;
11884 dwo_unit
->section
=
11885 XOBNEW (&dwarf2_per_objfile
->per_bfd
->obstack
, struct dwarf2_section_info
);
11886 *dwo_unit
->section
= sections
.info_or_types
;
11887 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
11892 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
11893 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
11894 piece within that section used by a TU/CU, return a virtual section
11895 of just that piece. */
11897 static struct dwarf2_section_info
11898 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11899 struct dwarf2_section_info
*section
,
11900 bfd_size_type offset
, bfd_size_type size
)
11902 struct dwarf2_section_info result
;
11905 gdb_assert (section
!= NULL
);
11906 gdb_assert (!section
->is_virtual
);
11908 memset (&result
, 0, sizeof (result
));
11909 result
.s
.containing_section
= section
;
11910 result
.is_virtual
= true;
11915 sectp
= section
->get_bfd_section ();
11917 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
11918 bounds of the real section. This is a pretty-rare event, so just
11919 flag an error (easier) instead of a warning and trying to cope. */
11921 || offset
+ size
> bfd_section_size (sectp
))
11923 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
11924 " in section %s [in module %s]"),
11925 sectp
? bfd_section_name (sectp
) : "<unknown>",
11926 objfile_name (dwarf2_per_objfile
->objfile
));
11929 result
.virtual_offset
= offset
;
11930 result
.size
= size
;
11934 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11935 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11936 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11937 This is for DWP version 2 files. */
11939 static struct dwo_unit
*
11940 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11941 struct dwp_file
*dwp_file
,
11942 uint32_t unit_index
,
11943 const char *comp_dir
,
11944 ULONGEST signature
, int is_debug_types
)
11946 const struct dwp_hash_table
*dwp_htab
=
11947 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
11948 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11949 const char *kind
= is_debug_types
? "TU" : "CU";
11950 struct dwo_file
*dwo_file
;
11951 struct dwo_unit
*dwo_unit
;
11952 struct virtual_v2_dwo_sections sections
;
11953 void **dwo_file_slot
;
11956 gdb_assert (dwp_file
->version
== 2);
11958 if (dwarf_read_debug
)
11960 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
11962 pulongest (unit_index
), hex_string (signature
),
11966 /* Fetch the section offsets of this DWO unit. */
11968 memset (§ions
, 0, sizeof (sections
));
11970 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
11972 uint32_t offset
= read_4_bytes (dbfd
,
11973 dwp_htab
->section_pool
.v2
.offsets
11974 + (((unit_index
- 1) * dwp_htab
->nr_columns
11976 * sizeof (uint32_t)));
11977 uint32_t size
= read_4_bytes (dbfd
,
11978 dwp_htab
->section_pool
.v2
.sizes
11979 + (((unit_index
- 1) * dwp_htab
->nr_columns
11981 * sizeof (uint32_t)));
11983 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
11986 case DW_SECT_TYPES
:
11987 sections
.info_or_types_offset
= offset
;
11988 sections
.info_or_types_size
= size
;
11990 case DW_SECT_ABBREV
:
11991 sections
.abbrev_offset
= offset
;
11992 sections
.abbrev_size
= size
;
11995 sections
.line_offset
= offset
;
11996 sections
.line_size
= size
;
11999 sections
.loc_offset
= offset
;
12000 sections
.loc_size
= size
;
12002 case DW_SECT_STR_OFFSETS
:
12003 sections
.str_offsets_offset
= offset
;
12004 sections
.str_offsets_size
= size
;
12006 case DW_SECT_MACINFO
:
12007 sections
.macinfo_offset
= offset
;
12008 sections
.macinfo_size
= size
;
12010 case DW_SECT_MACRO
:
12011 sections
.macro_offset
= offset
;
12012 sections
.macro_size
= size
;
12017 /* It's easier for the rest of the code if we fake a struct dwo_file and
12018 have dwo_unit "live" in that. At least for now.
12020 The DWP file can be made up of a random collection of CUs and TUs.
12021 However, for each CU + set of TUs that came from the same original DWO
12022 file, we can combine them back into a virtual DWO file to save space
12023 (fewer struct dwo_file objects to allocate). Remember that for really
12024 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12026 std::string virtual_dwo_name
=
12027 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12028 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12029 (long) (sections
.line_size
? sections
.line_offset
: 0),
12030 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12031 (long) (sections
.str_offsets_size
12032 ? sections
.str_offsets_offset
: 0));
12033 /* Can we use an existing virtual DWO file? */
12034 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12035 virtual_dwo_name
.c_str (),
12037 /* Create one if necessary. */
12038 if (*dwo_file_slot
== NULL
)
12040 if (dwarf_read_debug
)
12042 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12043 virtual_dwo_name
.c_str ());
12045 dwo_file
= new struct dwo_file
;
12046 dwo_file
->dwo_name
= dwarf2_per_objfile
->objfile
->intern (virtual_dwo_name
);
12047 dwo_file
->comp_dir
= comp_dir
;
12048 dwo_file
->sections
.abbrev
=
12049 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
12050 sections
.abbrev_offset
, sections
.abbrev_size
);
12051 dwo_file
->sections
.line
=
12052 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
12053 sections
.line_offset
, sections
.line_size
);
12054 dwo_file
->sections
.loc
=
12055 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12056 sections
.loc_offset
, sections
.loc_size
);
12057 dwo_file
->sections
.macinfo
=
12058 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12059 sections
.macinfo_offset
, sections
.macinfo_size
);
12060 dwo_file
->sections
.macro
=
12061 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12062 sections
.macro_offset
, sections
.macro_size
);
12063 dwo_file
->sections
.str_offsets
=
12064 create_dwp_v2_section (dwarf2_per_objfile
,
12065 &dwp_file
->sections
.str_offsets
,
12066 sections
.str_offsets_offset
,
12067 sections
.str_offsets_size
);
12068 /* The "str" section is global to the entire DWP file. */
12069 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12070 /* The info or types section is assigned below to dwo_unit,
12071 there's no need to record it in dwo_file.
12072 Also, we can't simply record type sections in dwo_file because
12073 we record a pointer into the vector in dwo_unit. As we collect more
12074 types we'll grow the vector and eventually have to reallocate space
12075 for it, invalidating all copies of pointers into the previous
12077 *dwo_file_slot
= dwo_file
;
12081 if (dwarf_read_debug
)
12083 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12084 virtual_dwo_name
.c_str ());
12086 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12089 dwo_unit
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
, struct dwo_unit
);
12090 dwo_unit
->dwo_file
= dwo_file
;
12091 dwo_unit
->signature
= signature
;
12092 dwo_unit
->section
=
12093 XOBNEW (&dwarf2_per_objfile
->per_bfd
->obstack
, struct dwarf2_section_info
);
12094 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12096 ? &dwp_file
->sections
.types
12097 : &dwp_file
->sections
.info
,
12098 sections
.info_or_types_offset
,
12099 sections
.info_or_types_size
);
12100 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12105 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12106 Returns NULL if the signature isn't found. */
12108 static struct dwo_unit
*
12109 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12110 struct dwp_file
*dwp_file
, const char *comp_dir
,
12111 ULONGEST signature
, int is_debug_types
)
12113 const struct dwp_hash_table
*dwp_htab
=
12114 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12115 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12116 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12117 uint32_t hash
= signature
& mask
;
12118 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12121 struct dwo_unit find_dwo_cu
;
12123 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12124 find_dwo_cu
.signature
= signature
;
12125 slot
= htab_find_slot (is_debug_types
12126 ? dwp_file
->loaded_tus
.get ()
12127 : dwp_file
->loaded_cus
.get (),
12128 &find_dwo_cu
, INSERT
);
12131 return (struct dwo_unit
*) *slot
;
12133 /* Use a for loop so that we don't loop forever on bad debug info. */
12134 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12136 ULONGEST signature_in_table
;
12138 signature_in_table
=
12139 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12140 if (signature_in_table
== signature
)
12142 uint32_t unit_index
=
12143 read_4_bytes (dbfd
,
12144 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12146 if (dwp_file
->version
== 1)
12148 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12149 dwp_file
, unit_index
,
12150 comp_dir
, signature
,
12155 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12156 dwp_file
, unit_index
,
12157 comp_dir
, signature
,
12160 return (struct dwo_unit
*) *slot
;
12162 if (signature_in_table
== 0)
12164 hash
= (hash
+ hash2
) & mask
;
12167 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12168 " [in module %s]"),
12172 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12173 Open the file specified by FILE_NAME and hand it off to BFD for
12174 preliminary analysis. Return a newly initialized bfd *, which
12175 includes a canonicalized copy of FILE_NAME.
12176 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12177 SEARCH_CWD is true if the current directory is to be searched.
12178 It will be searched before debug-file-directory.
12179 If successful, the file is added to the bfd include table of the
12180 objfile's bfd (see gdb_bfd_record_inclusion).
12181 If unable to find/open the file, return NULL.
12182 NOTE: This function is derived from symfile_bfd_open. */
12184 static gdb_bfd_ref_ptr
12185 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12186 const char *file_name
, int is_dwp
, int search_cwd
)
12189 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12190 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12191 to debug_file_directory. */
12192 const char *search_path
;
12193 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12195 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12198 if (*debug_file_directory
!= '\0')
12200 search_path_holder
.reset (concat (".", dirname_separator_string
,
12201 debug_file_directory
,
12203 search_path
= search_path_holder
.get ();
12209 search_path
= debug_file_directory
;
12211 openp_flags flags
= OPF_RETURN_REALPATH
;
12213 flags
|= OPF_SEARCH_IN_PATH
;
12215 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12216 desc
= openp (search_path
, flags
, file_name
,
12217 O_RDONLY
| O_BINARY
, &absolute_name
);
12221 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12223 if (sym_bfd
== NULL
)
12225 bfd_set_cacheable (sym_bfd
.get (), 1);
12227 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12230 /* Success. Record the bfd as having been included by the objfile's bfd.
12231 This is important because things like demangled_names_hash lives in the
12232 objfile's per_bfd space and may have references to things like symbol
12233 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12234 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12239 /* Try to open DWO file FILE_NAME.
12240 COMP_DIR is the DW_AT_comp_dir attribute.
12241 The result is the bfd handle of the file.
12242 If there is a problem finding or opening the file, return NULL.
12243 Upon success, the canonicalized path of the file is stored in the bfd,
12244 same as symfile_bfd_open. */
12246 static gdb_bfd_ref_ptr
12247 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12248 const char *file_name
, const char *comp_dir
)
12250 if (IS_ABSOLUTE_PATH (file_name
))
12251 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12252 0 /*is_dwp*/, 0 /*search_cwd*/);
12254 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12256 if (comp_dir
!= NULL
)
12258 gdb::unique_xmalloc_ptr
<char> path_to_try
12259 (concat (comp_dir
, SLASH_STRING
, file_name
, (char *) NULL
));
12261 /* NOTE: If comp_dir is a relative path, this will also try the
12262 search path, which seems useful. */
12263 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12264 path_to_try
.get (),
12266 1 /*search_cwd*/));
12271 /* That didn't work, try debug-file-directory, which, despite its name,
12272 is a list of paths. */
12274 if (*debug_file_directory
== '\0')
12277 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12278 0 /*is_dwp*/, 1 /*search_cwd*/);
12281 /* This function is mapped across the sections and remembers the offset and
12282 size of each of the DWO debugging sections we are interested in. */
12285 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12287 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12288 const struct dwop_section_names
*names
= &dwop_section_names
;
12290 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12292 dwo_sections
->abbrev
.s
.section
= sectp
;
12293 dwo_sections
->abbrev
.size
= bfd_section_size (sectp
);
12295 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12297 dwo_sections
->info
.s
.section
= sectp
;
12298 dwo_sections
->info
.size
= bfd_section_size (sectp
);
12300 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12302 dwo_sections
->line
.s
.section
= sectp
;
12303 dwo_sections
->line
.size
= bfd_section_size (sectp
);
12305 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12307 dwo_sections
->loc
.s
.section
= sectp
;
12308 dwo_sections
->loc
.size
= bfd_section_size (sectp
);
12310 else if (section_is_p (sectp
->name
, &names
->loclists_dwo
))
12312 dwo_sections
->loclists
.s
.section
= sectp
;
12313 dwo_sections
->loclists
.size
= bfd_section_size (sectp
);
12315 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12317 dwo_sections
->macinfo
.s
.section
= sectp
;
12318 dwo_sections
->macinfo
.size
= bfd_section_size (sectp
);
12320 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12322 dwo_sections
->macro
.s
.section
= sectp
;
12323 dwo_sections
->macro
.size
= bfd_section_size (sectp
);
12325 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12327 dwo_sections
->str
.s
.section
= sectp
;
12328 dwo_sections
->str
.size
= bfd_section_size (sectp
);
12330 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12332 dwo_sections
->str_offsets
.s
.section
= sectp
;
12333 dwo_sections
->str_offsets
.size
= bfd_section_size (sectp
);
12335 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12337 struct dwarf2_section_info type_section
;
12339 memset (&type_section
, 0, sizeof (type_section
));
12340 type_section
.s
.section
= sectp
;
12341 type_section
.size
= bfd_section_size (sectp
);
12342 dwo_sections
->types
.push_back (type_section
);
12346 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12347 by PER_CU. This is for the non-DWP case.
12348 The result is NULL if DWO_NAME can't be found. */
12350 static struct dwo_file
*
12351 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12352 const char *dwo_name
, const char *comp_dir
)
12354 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12356 gdb_bfd_ref_ptr dbfd
= open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
);
12359 if (dwarf_read_debug
)
12360 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12364 dwo_file_up
dwo_file (new struct dwo_file
);
12365 dwo_file
->dwo_name
= dwo_name
;
12366 dwo_file
->comp_dir
= comp_dir
;
12367 dwo_file
->dbfd
= std::move (dbfd
);
12369 bfd_map_over_sections (dwo_file
->dbfd
.get (), dwarf2_locate_dwo_sections
,
12370 &dwo_file
->sections
);
12372 create_cus_hash_table (dwarf2_per_objfile
, per_cu
->cu
, *dwo_file
,
12373 dwo_file
->sections
.info
, dwo_file
->cus
);
12375 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
12376 dwo_file
->sections
.types
, dwo_file
->tus
);
12378 if (dwarf_read_debug
)
12379 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
12381 return dwo_file
.release ();
12384 /* This function is mapped across the sections and remembers the offset and
12385 size of each of the DWP debugging sections common to version 1 and 2 that
12386 we are interested in. */
12389 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12390 void *dwp_file_ptr
)
12392 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12393 const struct dwop_section_names
*names
= &dwop_section_names
;
12394 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12396 /* Record the ELF section number for later lookup: this is what the
12397 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12398 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12399 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12401 /* Look for specific sections that we need. */
12402 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12404 dwp_file
->sections
.str
.s
.section
= sectp
;
12405 dwp_file
->sections
.str
.size
= bfd_section_size (sectp
);
12407 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12409 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12410 dwp_file
->sections
.cu_index
.size
= bfd_section_size (sectp
);
12412 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12414 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12415 dwp_file
->sections
.tu_index
.size
= bfd_section_size (sectp
);
12419 /* This function is mapped across the sections and remembers the offset and
12420 size of each of the DWP version 2 debugging sections that we are interested
12421 in. This is split into a separate function because we don't know if we
12422 have version 1 or 2 until we parse the cu_index/tu_index sections. */
12425 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12427 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12428 const struct dwop_section_names
*names
= &dwop_section_names
;
12429 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12431 /* Record the ELF section number for later lookup: this is what the
12432 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12433 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12434 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12436 /* Look for specific sections that we need. */
12437 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12439 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12440 dwp_file
->sections
.abbrev
.size
= bfd_section_size (sectp
);
12442 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12444 dwp_file
->sections
.info
.s
.section
= sectp
;
12445 dwp_file
->sections
.info
.size
= bfd_section_size (sectp
);
12447 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12449 dwp_file
->sections
.line
.s
.section
= sectp
;
12450 dwp_file
->sections
.line
.size
= bfd_section_size (sectp
);
12452 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12454 dwp_file
->sections
.loc
.s
.section
= sectp
;
12455 dwp_file
->sections
.loc
.size
= bfd_section_size (sectp
);
12457 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12459 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
12460 dwp_file
->sections
.macinfo
.size
= bfd_section_size (sectp
);
12462 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12464 dwp_file
->sections
.macro
.s
.section
= sectp
;
12465 dwp_file
->sections
.macro
.size
= bfd_section_size (sectp
);
12467 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12469 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
12470 dwp_file
->sections
.str_offsets
.size
= bfd_section_size (sectp
);
12472 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12474 dwp_file
->sections
.types
.s
.section
= sectp
;
12475 dwp_file
->sections
.types
.size
= bfd_section_size (sectp
);
12479 /* Hash function for dwp_file loaded CUs/TUs. */
12482 hash_dwp_loaded_cutus (const void *item
)
12484 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
12486 /* This drops the top 32 bits of the signature, but is ok for a hash. */
12487 return dwo_unit
->signature
;
12490 /* Equality function for dwp_file loaded CUs/TUs. */
12493 eq_dwp_loaded_cutus (const void *a
, const void *b
)
12495 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
12496 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
12498 return dua
->signature
== dub
->signature
;
12501 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
12504 allocate_dwp_loaded_cutus_table ()
12506 return htab_up (htab_create_alloc (3,
12507 hash_dwp_loaded_cutus
,
12508 eq_dwp_loaded_cutus
,
12509 NULL
, xcalloc
, xfree
));
12512 /* Try to open DWP file FILE_NAME.
12513 The result is the bfd handle of the file.
12514 If there is a problem finding or opening the file, return NULL.
12515 Upon success, the canonicalized path of the file is stored in the bfd,
12516 same as symfile_bfd_open. */
12518 static gdb_bfd_ref_ptr
12519 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12520 const char *file_name
)
12522 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12524 1 /*search_cwd*/));
12528 /* Work around upstream bug 15652.
12529 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
12530 [Whether that's a "bug" is debatable, but it is getting in our way.]
12531 We have no real idea where the dwp file is, because gdb's realpath-ing
12532 of the executable's path may have discarded the needed info.
12533 [IWBN if the dwp file name was recorded in the executable, akin to
12534 .gnu_debuglink, but that doesn't exist yet.]
12535 Strip the directory from FILE_NAME and search again. */
12536 if (*debug_file_directory
!= '\0')
12538 /* Don't implicitly search the current directory here.
12539 If the user wants to search "." to handle this case,
12540 it must be added to debug-file-directory. */
12541 return try_open_dwop_file (dwarf2_per_objfile
,
12542 lbasename (file_name
), 1 /*is_dwp*/,
12549 /* Initialize the use of the DWP file for the current objfile.
12550 By convention the name of the DWP file is ${objfile}.dwp.
12551 The result is NULL if it can't be found. */
12553 static std::unique_ptr
<struct dwp_file
>
12554 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12556 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12558 /* Try to find first .dwp for the binary file before any symbolic links
12561 /* If the objfile is a debug file, find the name of the real binary
12562 file and get the name of dwp file from there. */
12563 std::string dwp_name
;
12564 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
12566 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
12567 const char *backlink_basename
= lbasename (backlink
->original_name
);
12569 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
12572 dwp_name
= objfile
->original_name
;
12574 dwp_name
+= ".dwp";
12576 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
12578 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
12580 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
12581 dwp_name
= objfile_name (objfile
);
12582 dwp_name
+= ".dwp";
12583 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
12588 if (dwarf_read_debug
)
12589 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
12590 return std::unique_ptr
<dwp_file
> ();
12593 const char *name
= bfd_get_filename (dbfd
.get ());
12594 std::unique_ptr
<struct dwp_file
> dwp_file
12595 (new struct dwp_file (name
, std::move (dbfd
)));
12597 dwp_file
->num_sections
= elf_numsections (dwp_file
->dbfd
);
12598 dwp_file
->elf_sections
=
12599 OBSTACK_CALLOC (&dwarf2_per_objfile
->per_bfd
->obstack
,
12600 dwp_file
->num_sections
, asection
*);
12602 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12603 dwarf2_locate_common_dwp_sections
,
12606 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12609 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
12612 /* The DWP file version is stored in the hash table. Oh well. */
12613 if (dwp_file
->cus
&& dwp_file
->tus
12614 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
12616 /* Technically speaking, we should try to limp along, but this is
12617 pretty bizarre. We use pulongest here because that's the established
12618 portability solution (e.g, we cannot use %u for uint32_t). */
12619 error (_("Dwarf Error: DWP file CU version %s doesn't match"
12620 " TU version %s [in DWP file %s]"),
12621 pulongest (dwp_file
->cus
->version
),
12622 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
12626 dwp_file
->version
= dwp_file
->cus
->version
;
12627 else if (dwp_file
->tus
)
12628 dwp_file
->version
= dwp_file
->tus
->version
;
12630 dwp_file
->version
= 2;
12632 if (dwp_file
->version
== 2)
12633 bfd_map_over_sections (dwp_file
->dbfd
.get (),
12634 dwarf2_locate_v2_dwp_sections
,
12637 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table ();
12638 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table ();
12640 if (dwarf_read_debug
)
12642 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
12643 fprintf_unfiltered (gdb_stdlog
,
12644 " %s CUs, %s TUs\n",
12645 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
12646 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
12652 /* Wrapper around open_and_init_dwp_file, only open it once. */
12654 static struct dwp_file
*
12655 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
12657 if (! dwarf2_per_objfile
->per_bfd
->dwp_checked
)
12659 dwarf2_per_objfile
->per_bfd
->dwp_file
12660 = open_and_init_dwp_file (dwarf2_per_objfile
);
12661 dwarf2_per_objfile
->per_bfd
->dwp_checked
= 1;
12663 return dwarf2_per_objfile
->per_bfd
->dwp_file
.get ();
12666 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
12667 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
12668 or in the DWP file for the objfile, referenced by THIS_UNIT.
12669 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
12670 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
12672 This is called, for example, when wanting to read a variable with a
12673 complex location. Therefore we don't want to do file i/o for every call.
12674 Therefore we don't want to look for a DWO file on every call.
12675 Therefore we first see if we've already seen SIGNATURE in a DWP file,
12676 then we check if we've already seen DWO_NAME, and only THEN do we check
12679 The result is a pointer to the dwo_unit object or NULL if we didn't find it
12680 (dwo_id mismatch or couldn't find the DWO/DWP file). */
12682 static struct dwo_unit
*
12683 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
12684 const char *dwo_name
, const char *comp_dir
,
12685 ULONGEST signature
, int is_debug_types
)
12687 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
12688 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12689 const char *kind
= is_debug_types
? "TU" : "CU";
12690 void **dwo_file_slot
;
12691 struct dwo_file
*dwo_file
;
12692 struct dwp_file
*dwp_file
;
12694 /* First see if there's a DWP file.
12695 If we have a DWP file but didn't find the DWO inside it, don't
12696 look for the original DWO file. It makes gdb behave differently
12697 depending on whether one is debugging in the build tree. */
12699 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
12700 if (dwp_file
!= NULL
)
12702 const struct dwp_hash_table
*dwp_htab
=
12703 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12705 if (dwp_htab
!= NULL
)
12707 struct dwo_unit
*dwo_cutu
=
12708 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
12709 signature
, is_debug_types
);
12711 if (dwo_cutu
!= NULL
)
12713 if (dwarf_read_debug
)
12715 fprintf_unfiltered (gdb_stdlog
,
12716 "Virtual DWO %s %s found: @%s\n",
12717 kind
, hex_string (signature
),
12718 host_address_to_string (dwo_cutu
));
12726 /* No DWP file, look for the DWO file. */
12728 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12729 dwo_name
, comp_dir
);
12730 if (*dwo_file_slot
== NULL
)
12732 /* Read in the file and build a table of the CUs/TUs it contains. */
12733 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
12735 /* NOTE: This will be NULL if unable to open the file. */
12736 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12738 if (dwo_file
!= NULL
)
12740 struct dwo_unit
*dwo_cutu
= NULL
;
12742 if (is_debug_types
&& dwo_file
->tus
)
12744 struct dwo_unit find_dwo_cutu
;
12746 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12747 find_dwo_cutu
.signature
= signature
;
12749 = (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
12752 else if (!is_debug_types
&& dwo_file
->cus
)
12754 struct dwo_unit find_dwo_cutu
;
12756 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
12757 find_dwo_cutu
.signature
= signature
;
12758 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
.get (),
12762 if (dwo_cutu
!= NULL
)
12764 if (dwarf_read_debug
)
12766 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
12767 kind
, dwo_name
, hex_string (signature
),
12768 host_address_to_string (dwo_cutu
));
12775 /* We didn't find it. This could mean a dwo_id mismatch, or
12776 someone deleted the DWO/DWP file, or the search path isn't set up
12777 correctly to find the file. */
12779 if (dwarf_read_debug
)
12781 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
12782 kind
, dwo_name
, hex_string (signature
));
12785 /* This is a warning and not a complaint because it can be caused by
12786 pilot error (e.g., user accidentally deleting the DWO). */
12788 /* Print the name of the DWP file if we looked there, helps the user
12789 better diagnose the problem. */
12790 std::string dwp_text
;
12792 if (dwp_file
!= NULL
)
12793 dwp_text
= string_printf (" [in DWP file %s]",
12794 lbasename (dwp_file
->name
));
12796 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
12797 " [in module %s]"),
12798 kind
, dwo_name
, hex_string (signature
),
12800 this_unit
->is_debug_types
? "TU" : "CU",
12801 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
12806 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
12807 See lookup_dwo_cutu_unit for details. */
12809 static struct dwo_unit
*
12810 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
12811 const char *dwo_name
, const char *comp_dir
,
12812 ULONGEST signature
)
12814 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
12817 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
12818 See lookup_dwo_cutu_unit for details. */
12820 static struct dwo_unit
*
12821 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
12822 const char *dwo_name
, const char *comp_dir
)
12824 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
12827 /* Traversal function for queue_and_load_all_dwo_tus. */
12830 queue_and_load_dwo_tu (void **slot
, void *info
)
12832 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
12833 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
12834 ULONGEST signature
= dwo_unit
->signature
;
12835 struct signatured_type
*sig_type
=
12836 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
12838 if (sig_type
!= NULL
)
12840 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
12842 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
12843 a real dependency of PER_CU on SIG_TYPE. That is detected later
12844 while processing PER_CU. */
12845 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
12846 load_full_type_unit (sig_cu
, per_cu
->cu
->per_objfile
);
12847 per_cu
->imported_symtabs_push (sig_cu
);
12853 /* Queue all TUs contained in the DWO of PER_CU to be read in.
12854 The DWO may have the only definition of the type, though it may not be
12855 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
12856 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
12859 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
12861 struct dwo_unit
*dwo_unit
;
12862 struct dwo_file
*dwo_file
;
12864 gdb_assert (!per_cu
->is_debug_types
);
12865 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
12866 gdb_assert (per_cu
->cu
!= NULL
);
12868 dwo_unit
= per_cu
->cu
->dwo_unit
;
12869 gdb_assert (dwo_unit
!= NULL
);
12871 dwo_file
= dwo_unit
->dwo_file
;
12872 if (dwo_file
->tus
!= NULL
)
12873 htab_traverse_noresize (dwo_file
->tus
.get (), queue_and_load_dwo_tu
,
12877 /* Read in various DIEs. */
12879 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
12880 Inherit only the children of the DW_AT_abstract_origin DIE not being
12881 already referenced by DW_AT_abstract_origin from the children of the
12885 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
12887 struct die_info
*child_die
;
12888 sect_offset
*offsetp
;
12889 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
12890 struct die_info
*origin_die
;
12891 /* Iterator of the ORIGIN_DIE children. */
12892 struct die_info
*origin_child_die
;
12893 struct attribute
*attr
;
12894 struct dwarf2_cu
*origin_cu
;
12895 struct pending
**origin_previous_list_in_scope
;
12897 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
12901 /* Note that following die references may follow to a die in a
12905 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
12907 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
12909 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
12910 origin_cu
->list_in_scope
= cu
->list_in_scope
;
12912 if (die
->tag
!= origin_die
->tag
12913 && !(die
->tag
== DW_TAG_inlined_subroutine
12914 && origin_die
->tag
== DW_TAG_subprogram
))
12915 complaint (_("DIE %s and its abstract origin %s have different tags"),
12916 sect_offset_str (die
->sect_off
),
12917 sect_offset_str (origin_die
->sect_off
));
12919 std::vector
<sect_offset
> offsets
;
12921 for (child_die
= die
->child
;
12922 child_die
&& child_die
->tag
;
12923 child_die
= child_die
->sibling
)
12925 struct die_info
*child_origin_die
;
12926 struct dwarf2_cu
*child_origin_cu
;
12928 /* We are trying to process concrete instance entries:
12929 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
12930 it's not relevant to our analysis here. i.e. detecting DIEs that are
12931 present in the abstract instance but not referenced in the concrete
12933 if (child_die
->tag
== DW_TAG_call_site
12934 || child_die
->tag
== DW_TAG_GNU_call_site
)
12937 /* For each CHILD_DIE, find the corresponding child of
12938 ORIGIN_DIE. If there is more than one layer of
12939 DW_AT_abstract_origin, follow them all; there shouldn't be,
12940 but GCC versions at least through 4.4 generate this (GCC PR
12942 child_origin_die
= child_die
;
12943 child_origin_cu
= cu
;
12946 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
12950 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
12954 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
12955 counterpart may exist. */
12956 if (child_origin_die
!= child_die
)
12958 if (child_die
->tag
!= child_origin_die
->tag
12959 && !(child_die
->tag
== DW_TAG_inlined_subroutine
12960 && child_origin_die
->tag
== DW_TAG_subprogram
))
12961 complaint (_("Child DIE %s and its abstract origin %s have "
12963 sect_offset_str (child_die
->sect_off
),
12964 sect_offset_str (child_origin_die
->sect_off
));
12965 if (child_origin_die
->parent
!= origin_die
)
12966 complaint (_("Child DIE %s and its abstract origin %s have "
12967 "different parents"),
12968 sect_offset_str (child_die
->sect_off
),
12969 sect_offset_str (child_origin_die
->sect_off
));
12971 offsets
.push_back (child_origin_die
->sect_off
);
12974 std::sort (offsets
.begin (), offsets
.end ());
12975 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
12976 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
12977 if (offsetp
[-1] == *offsetp
)
12978 complaint (_("Multiple children of DIE %s refer "
12979 "to DIE %s as their abstract origin"),
12980 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
12982 offsetp
= offsets
.data ();
12983 origin_child_die
= origin_die
->child
;
12984 while (origin_child_die
&& origin_child_die
->tag
)
12986 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
12987 while (offsetp
< offsets_end
12988 && *offsetp
< origin_child_die
->sect_off
)
12990 if (offsetp
>= offsets_end
12991 || *offsetp
> origin_child_die
->sect_off
)
12993 /* Found that ORIGIN_CHILD_DIE is really not referenced.
12994 Check whether we're already processing ORIGIN_CHILD_DIE.
12995 This can happen with mutually referenced abstract_origins.
12997 if (!origin_child_die
->in_process
)
12998 process_die (origin_child_die
, origin_cu
);
13000 origin_child_die
= origin_child_die
->sibling
;
13002 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13004 if (cu
!= origin_cu
)
13005 compute_delayed_physnames (origin_cu
);
13009 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13011 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
13012 struct gdbarch
*gdbarch
= objfile
->arch ();
13013 struct context_stack
*newobj
;
13016 struct die_info
*child_die
;
13017 struct attribute
*attr
, *call_line
, *call_file
;
13019 CORE_ADDR baseaddr
;
13020 struct block
*block
;
13021 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13022 std::vector
<struct symbol
*> template_args
;
13023 struct template_symbol
*templ_func
= NULL
;
13027 /* If we do not have call site information, we can't show the
13028 caller of this inlined function. That's too confusing, so
13029 only use the scope for local variables. */
13030 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13031 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13032 if (call_line
== NULL
|| call_file
== NULL
)
13034 read_lexical_block_scope (die
, cu
);
13039 baseaddr
= objfile
->text_section_offset ();
13041 name
= dwarf2_name (die
, cu
);
13043 /* Ignore functions with missing or empty names. These are actually
13044 illegal according to the DWARF standard. */
13047 complaint (_("missing name for subprogram DIE at %s"),
13048 sect_offset_str (die
->sect_off
));
13052 /* Ignore functions with missing or invalid low and high pc attributes. */
13053 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13054 <= PC_BOUNDS_INVALID
)
13056 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13057 if (!attr
|| !DW_UNSND (attr
))
13058 complaint (_("cannot get low and high bounds "
13059 "for subprogram DIE at %s"),
13060 sect_offset_str (die
->sect_off
));
13064 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13065 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13067 /* If we have any template arguments, then we must allocate a
13068 different sort of symbol. */
13069 for (child_die
= die
->child
; child_die
; child_die
= child_die
->sibling
)
13071 if (child_die
->tag
== DW_TAG_template_type_param
13072 || child_die
->tag
== DW_TAG_template_value_param
)
13074 templ_func
= new (&objfile
->objfile_obstack
) template_symbol
;
13075 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13080 newobj
= cu
->get_builder ()->push_context (0, lowpc
);
13081 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13082 (struct symbol
*) templ_func
);
13084 if (dwarf2_flag_true_p (die
, DW_AT_main_subprogram
, cu
))
13085 set_objfile_main_name (objfile
, newobj
->name
->linkage_name (),
13088 /* If there is a location expression for DW_AT_frame_base, record
13090 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13091 if (attr
!= nullptr)
13092 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13094 /* If there is a location for the static link, record it. */
13095 newobj
->static_link
= NULL
;
13096 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13097 if (attr
!= nullptr)
13099 newobj
->static_link
13100 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13101 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
,
13102 cu
->per_cu
->addr_type ());
13105 cu
->list_in_scope
= cu
->get_builder ()->get_local_symbols ();
13107 if (die
->child
!= NULL
)
13109 child_die
= die
->child
;
13110 while (child_die
&& child_die
->tag
)
13112 if (child_die
->tag
== DW_TAG_template_type_param
13113 || child_die
->tag
== DW_TAG_template_value_param
)
13115 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13118 template_args
.push_back (arg
);
13121 process_die (child_die
, cu
);
13122 child_die
= child_die
->sibling
;
13126 inherit_abstract_dies (die
, cu
);
13128 /* If we have a DW_AT_specification, we might need to import using
13129 directives from the context of the specification DIE. See the
13130 comment in determine_prefix. */
13131 if (cu
->language
== language_cplus
13132 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13134 struct dwarf2_cu
*spec_cu
= cu
;
13135 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13139 child_die
= spec_die
->child
;
13140 while (child_die
&& child_die
->tag
)
13142 if (child_die
->tag
== DW_TAG_imported_module
)
13143 process_die (child_die
, spec_cu
);
13144 child_die
= child_die
->sibling
;
13147 /* In some cases, GCC generates specification DIEs that
13148 themselves contain DW_AT_specification attributes. */
13149 spec_die
= die_specification (spec_die
, &spec_cu
);
13153 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13154 /* Make a block for the local symbols within. */
13155 block
= cu
->get_builder ()->finish_block (cstk
.name
, cstk
.old_blocks
,
13156 cstk
.static_link
, lowpc
, highpc
);
13158 /* For C++, set the block's scope. */
13159 if ((cu
->language
== language_cplus
13160 || cu
->language
== language_fortran
13161 || cu
->language
== language_d
13162 || cu
->language
== language_rust
)
13163 && cu
->processing_has_namespace_info
)
13164 block_set_scope (block
, determine_prefix (die
, cu
),
13165 &objfile
->objfile_obstack
);
13167 /* If we have address ranges, record them. */
13168 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13170 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
13172 /* Attach template arguments to function. */
13173 if (!template_args
.empty ())
13175 gdb_assert (templ_func
!= NULL
);
13177 templ_func
->n_template_arguments
= template_args
.size ();
13178 templ_func
->template_arguments
13179 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13180 templ_func
->n_template_arguments
);
13181 memcpy (templ_func
->template_arguments
,
13182 template_args
.data (),
13183 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13185 /* Make sure that the symtab is set on the new symbols. Even
13186 though they don't appear in this symtab directly, other parts
13187 of gdb assume that symbols do, and this is reasonably
13189 for (symbol
*sym
: template_args
)
13190 symbol_set_symtab (sym
, symbol_symtab (templ_func
));
13193 /* In C++, we can have functions nested inside functions (e.g., when
13194 a function declares a class that has methods). This means that
13195 when we finish processing a function scope, we may need to go
13196 back to building a containing block's symbol lists. */
13197 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13198 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13200 /* If we've finished processing a top-level function, subsequent
13201 symbols go in the file symbol list. */
13202 if (cu
->get_builder ()->outermost_context_p ())
13203 cu
->list_in_scope
= cu
->get_builder ()->get_file_symbols ();
13206 /* Process all the DIES contained within a lexical block scope. Start
13207 a new scope, process the dies, and then close the scope. */
13210 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13212 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
13213 struct gdbarch
*gdbarch
= objfile
->arch ();
13214 CORE_ADDR lowpc
, highpc
;
13215 struct die_info
*child_die
;
13216 CORE_ADDR baseaddr
;
13218 baseaddr
= objfile
->text_section_offset ();
13220 /* Ignore blocks with missing or invalid low and high pc attributes. */
13221 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13222 as multiple lexical blocks? Handling children in a sane way would
13223 be nasty. Might be easier to properly extend generic blocks to
13224 describe ranges. */
13225 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13227 case PC_BOUNDS_NOT_PRESENT
:
13228 /* DW_TAG_lexical_block has no attributes, process its children as if
13229 there was no wrapping by that DW_TAG_lexical_block.
13230 GCC does no longer produces such DWARF since GCC r224161. */
13231 for (child_die
= die
->child
;
13232 child_die
!= NULL
&& child_die
->tag
;
13233 child_die
= child_die
->sibling
)
13235 /* We might already be processing this DIE. This can happen
13236 in an unusual circumstance -- where a subroutine A
13237 appears lexically in another subroutine B, but A actually
13238 inlines B. The recursion is broken here, rather than in
13239 inherit_abstract_dies, because it seems better to simply
13240 drop concrete children here. */
13241 if (!child_die
->in_process
)
13242 process_die (child_die
, cu
);
13245 case PC_BOUNDS_INVALID
:
13248 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13249 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13251 cu
->get_builder ()->push_context (0, lowpc
);
13252 if (die
->child
!= NULL
)
13254 child_die
= die
->child
;
13255 while (child_die
&& child_die
->tag
)
13257 process_die (child_die
, cu
);
13258 child_die
= child_die
->sibling
;
13261 inherit_abstract_dies (die
, cu
);
13262 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13264 if (*cu
->get_builder ()->get_local_symbols () != NULL
13265 || (*cu
->get_builder ()->get_local_using_directives ()) != NULL
)
13267 struct block
*block
13268 = cu
->get_builder ()->finish_block (0, cstk
.old_blocks
, NULL
,
13269 cstk
.start_addr
, highpc
);
13271 /* Note that recording ranges after traversing children, as we
13272 do here, means that recording a parent's ranges entails
13273 walking across all its children's ranges as they appear in
13274 the address map, which is quadratic behavior.
13276 It would be nicer to record the parent's ranges before
13277 traversing its children, simply overriding whatever you find
13278 there. But since we don't even decide whether to create a
13279 block until after we've traversed its children, that's hard
13281 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13283 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13284 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13287 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13290 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13292 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
13293 struct objfile
*objfile
= per_objfile
->objfile
;
13294 struct gdbarch
*gdbarch
= objfile
->arch ();
13295 CORE_ADDR pc
, baseaddr
;
13296 struct attribute
*attr
;
13297 struct call_site
*call_site
, call_site_local
;
13300 struct die_info
*child_die
;
13302 baseaddr
= objfile
->text_section_offset ();
13304 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13307 /* This was a pre-DWARF-5 GNU extension alias
13308 for DW_AT_call_return_pc. */
13309 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13313 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13314 "DIE %s [in module %s]"),
13315 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13318 pc
= attr
->value_as_address () + baseaddr
;
13319 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13321 if (cu
->call_site_htab
== NULL
)
13322 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13323 NULL
, &objfile
->objfile_obstack
,
13324 hashtab_obstack_allocate
, NULL
);
13325 call_site_local
.pc
= pc
;
13326 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13329 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13330 "DIE %s [in module %s]"),
13331 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13332 objfile_name (objfile
));
13336 /* Count parameters at the caller. */
13339 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13340 child_die
= child_die
->sibling
)
13342 if (child_die
->tag
!= DW_TAG_call_site_parameter
13343 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13345 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
13346 "DW_TAG_call_site child DIE %s [in module %s]"),
13347 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13348 objfile_name (objfile
));
13356 = ((struct call_site
*)
13357 obstack_alloc (&objfile
->objfile_obstack
,
13358 sizeof (*call_site
)
13359 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13361 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13362 call_site
->pc
= pc
;
13364 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13365 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13367 struct die_info
*func_die
;
13369 /* Skip also over DW_TAG_inlined_subroutine. */
13370 for (func_die
= die
->parent
;
13371 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13372 && func_die
->tag
!= DW_TAG_subroutine_type
;
13373 func_die
= func_die
->parent
);
13375 /* DW_AT_call_all_calls is a superset
13376 of DW_AT_call_all_tail_calls. */
13378 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13379 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13380 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13381 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13383 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13384 not complete. But keep CALL_SITE for look ups via call_site_htab,
13385 both the initial caller containing the real return address PC and
13386 the final callee containing the current PC of a chain of tail
13387 calls do not need to have the tail call list complete. But any
13388 function candidate for a virtual tail call frame searched via
13389 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13390 determined unambiguously. */
13394 struct type
*func_type
= NULL
;
13397 func_type
= get_die_type (func_die
, cu
);
13398 if (func_type
!= NULL
)
13400 gdb_assert (func_type
->code () == TYPE_CODE_FUNC
);
13402 /* Enlist this call site to the function. */
13403 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13404 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13407 complaint (_("Cannot find function owning DW_TAG_call_site "
13408 "DIE %s [in module %s]"),
13409 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13413 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13415 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13417 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13420 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13421 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13423 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
13424 if (!attr
|| (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0))
13425 /* Keep NULL DWARF_BLOCK. */;
13426 else if (attr
->form_is_block ())
13428 struct dwarf2_locexpr_baton
*dlbaton
;
13430 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13431 dlbaton
->data
= DW_BLOCK (attr
)->data
;
13432 dlbaton
->size
= DW_BLOCK (attr
)->size
;
13433 dlbaton
->per_objfile
= per_objfile
;
13434 dlbaton
->per_cu
= cu
->per_cu
;
13436 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
13438 else if (attr
->form_is_ref ())
13440 struct dwarf2_cu
*target_cu
= cu
;
13441 struct die_info
*target_die
;
13443 target_die
= follow_die_ref (die
, attr
, &target_cu
);
13444 gdb_assert (target_cu
->per_objfile
->objfile
== objfile
);
13445 if (die_is_declaration (target_die
, target_cu
))
13447 const char *target_physname
;
13449 /* Prefer the mangled name; otherwise compute the demangled one. */
13450 target_physname
= dw2_linkage_name (target_die
, target_cu
);
13451 if (target_physname
== NULL
)
13452 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
13453 if (target_physname
== NULL
)
13454 complaint (_("DW_AT_call_target target DIE has invalid "
13455 "physname, for referencing DIE %s [in module %s]"),
13456 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13458 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
13464 /* DW_AT_entry_pc should be preferred. */
13465 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
13466 <= PC_BOUNDS_INVALID
)
13467 complaint (_("DW_AT_call_target target DIE has invalid "
13468 "low pc, for referencing DIE %s [in module %s]"),
13469 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13472 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13473 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
13478 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
13479 "block nor reference, for DIE %s [in module %s]"),
13480 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13482 call_site
->per_cu
= cu
->per_cu
;
13484 for (child_die
= die
->child
;
13485 child_die
&& child_die
->tag
;
13486 child_die
= child_die
->sibling
)
13488 struct call_site_parameter
*parameter
;
13489 struct attribute
*loc
, *origin
;
13491 if (child_die
->tag
!= DW_TAG_call_site_parameter
13492 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13494 /* Already printed the complaint above. */
13498 gdb_assert (call_site
->parameter_count
< nparams
);
13499 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
13501 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
13502 specifies DW_TAG_formal_parameter. Value of the data assumed for the
13503 register is contained in DW_AT_call_value. */
13505 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
13506 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
13507 if (origin
== NULL
)
13509 /* This was a pre-DWARF-5 GNU extension alias
13510 for DW_AT_call_parameter. */
13511 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
13513 if (loc
== NULL
&& origin
!= NULL
&& origin
->form_is_ref ())
13515 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
13517 sect_offset sect_off
= origin
->get_ref_die_offset ();
13518 if (!cu
->header
.offset_in_cu_p (sect_off
))
13520 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
13521 binding can be done only inside one CU. Such referenced DIE
13522 therefore cannot be even moved to DW_TAG_partial_unit. */
13523 complaint (_("DW_AT_call_parameter offset is not in CU for "
13524 "DW_TAG_call_site child DIE %s [in module %s]"),
13525 sect_offset_str (child_die
->sect_off
),
13526 objfile_name (objfile
));
13529 parameter
->u
.param_cu_off
13530 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
13532 else if (loc
== NULL
|| origin
!= NULL
|| !loc
->form_is_block ())
13534 complaint (_("No DW_FORM_block* DW_AT_location for "
13535 "DW_TAG_call_site child DIE %s [in module %s]"),
13536 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
13541 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
13542 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
13543 if (parameter
->u
.dwarf_reg
!= -1)
13544 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
13545 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
13546 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
13547 ¶meter
->u
.fb_offset
))
13548 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
13551 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
13552 "for DW_FORM_block* DW_AT_location is supported for "
13553 "DW_TAG_call_site child DIE %s "
13555 sect_offset_str (child_die
->sect_off
),
13556 objfile_name (objfile
));
13561 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
13563 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
13564 if (attr
== NULL
|| !attr
->form_is_block ())
13566 complaint (_("No DW_FORM_block* DW_AT_call_value for "
13567 "DW_TAG_call_site child DIE %s [in module %s]"),
13568 sect_offset_str (child_die
->sect_off
),
13569 objfile_name (objfile
));
13572 parameter
->value
= DW_BLOCK (attr
)->data
;
13573 parameter
->value_size
= DW_BLOCK (attr
)->size
;
13575 /* Parameters are not pre-cleared by memset above. */
13576 parameter
->data_value
= NULL
;
13577 parameter
->data_value_size
= 0;
13578 call_site
->parameter_count
++;
13580 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
13582 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
13583 if (attr
!= nullptr)
13585 if (!attr
->form_is_block ())
13586 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
13587 "DW_TAG_call_site child DIE %s [in module %s]"),
13588 sect_offset_str (child_die
->sect_off
),
13589 objfile_name (objfile
));
13592 parameter
->data_value
= DW_BLOCK (attr
)->data
;
13593 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
13599 /* Helper function for read_variable. If DIE represents a virtual
13600 table, then return the type of the concrete object that is
13601 associated with the virtual table. Otherwise, return NULL. */
13603 static struct type
*
13604 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
13606 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
13610 /* Find the type DIE. */
13611 struct die_info
*type_die
= NULL
;
13612 struct dwarf2_cu
*type_cu
= cu
;
13614 if (attr
->form_is_ref ())
13615 type_die
= follow_die_ref (die
, attr
, &type_cu
);
13616 if (type_die
== NULL
)
13619 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
13621 return die_containing_type (type_die
, type_cu
);
13624 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
13627 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
13629 struct rust_vtable_symbol
*storage
= NULL
;
13631 if (cu
->language
== language_rust
)
13633 struct type
*containing_type
= rust_containing_type (die
, cu
);
13635 if (containing_type
!= NULL
)
13637 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
13639 storage
= new (&objfile
->objfile_obstack
) rust_vtable_symbol
;
13640 storage
->concrete_type
= containing_type
;
13641 storage
->subclass
= SYMBOL_RUST_VTABLE
;
13645 struct symbol
*res
= new_symbol (die
, NULL
, cu
, storage
);
13646 struct attribute
*abstract_origin
13647 = dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13648 struct attribute
*loc
= dwarf2_attr (die
, DW_AT_location
, cu
);
13649 if (res
== NULL
&& loc
&& abstract_origin
)
13651 /* We have a variable without a name, but with a location and an abstract
13652 origin. This may be a concrete instance of an abstract variable
13653 referenced from an DW_OP_GNU_variable_value, so save it to find it back
13655 struct dwarf2_cu
*origin_cu
= cu
;
13656 struct die_info
*origin_die
13657 = follow_die_ref (die
, abstract_origin
, &origin_cu
);
13658 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
13659 per_objfile
->per_bfd
->abstract_to_concrete
13660 [origin_die
->sect_off
].push_back (die
->sect_off
);
13664 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
13665 reading .debug_rnglists.
13666 Callback's type should be:
13667 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13668 Return true if the attributes are present and valid, otherwise,
13671 template <typename Callback
>
13673 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
13674 Callback
&&callback
)
13676 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
13677 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13678 bfd
*obfd
= objfile
->obfd
;
13679 /* Base address selection entry. */
13680 gdb::optional
<CORE_ADDR
> base
;
13681 const gdb_byte
*buffer
;
13682 CORE_ADDR baseaddr
;
13683 bool overflow
= false;
13685 base
= cu
->base_address
;
13687 dwarf2_per_objfile
->per_bfd
->rnglists
.read (objfile
);
13688 if (offset
>= dwarf2_per_objfile
->per_bfd
->rnglists
.size
)
13690 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
13694 buffer
= dwarf2_per_objfile
->per_bfd
->rnglists
.buffer
+ offset
;
13696 baseaddr
= objfile
->text_section_offset ();
13700 /* Initialize it due to a false compiler warning. */
13701 CORE_ADDR range_beginning
= 0, range_end
= 0;
13702 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->per_bfd
->rnglists
.buffer
13703 + dwarf2_per_objfile
->per_bfd
->rnglists
.size
);
13704 unsigned int bytes_read
;
13706 if (buffer
== buf_end
)
13711 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
13714 case DW_RLE_end_of_list
:
13716 case DW_RLE_base_address
:
13717 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13722 base
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
13723 buffer
+= bytes_read
;
13725 case DW_RLE_start_length
:
13726 if (buffer
+ cu
->header
.addr_size
> buf_end
)
13731 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
13733 buffer
+= bytes_read
;
13734 range_end
= (range_beginning
13735 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
13736 buffer
+= bytes_read
;
13737 if (buffer
> buf_end
)
13743 case DW_RLE_offset_pair
:
13744 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13745 buffer
+= bytes_read
;
13746 if (buffer
> buf_end
)
13751 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
13752 buffer
+= bytes_read
;
13753 if (buffer
> buf_end
)
13759 case DW_RLE_start_end
:
13760 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
13765 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
13767 buffer
+= bytes_read
;
13768 range_end
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
13769 buffer
+= bytes_read
;
13772 complaint (_("Invalid .debug_rnglists data (no base address)"));
13775 if (rlet
== DW_RLE_end_of_list
|| overflow
)
13777 if (rlet
== DW_RLE_base_address
)
13780 if (!base
.has_value ())
13782 /* We have no valid base address for the ranges
13784 complaint (_("Invalid .debug_rnglists data (no base address)"));
13788 if (range_beginning
> range_end
)
13790 /* Inverted range entries are invalid. */
13791 complaint (_("Invalid .debug_rnglists data (inverted range)"));
13795 /* Empty range entries have no effect. */
13796 if (range_beginning
== range_end
)
13799 range_beginning
+= *base
;
13800 range_end
+= *base
;
13802 /* A not-uncommon case of bad debug info.
13803 Don't pollute the addrmap with bad data. */
13804 if (range_beginning
+ baseaddr
== 0
13805 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
13807 complaint (_(".debug_rnglists entry has start address of zero"
13808 " [in module %s]"), objfile_name (objfile
));
13812 callback (range_beginning
, range_end
);
13817 complaint (_("Offset %d is not terminated "
13818 "for DW_AT_ranges attribute"),
13826 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
13827 Callback's type should be:
13828 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
13829 Return 1 if the attributes are present and valid, otherwise, return 0. */
13831 template <typename Callback
>
13833 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
13834 Callback
&&callback
)
13836 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
13837 struct objfile
*objfile
= per_objfile
->objfile
;
13838 struct comp_unit_head
*cu_header
= &cu
->header
;
13839 bfd
*obfd
= objfile
->obfd
;
13840 unsigned int addr_size
= cu_header
->addr_size
;
13841 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
13842 /* Base address selection entry. */
13843 gdb::optional
<CORE_ADDR
> base
;
13844 unsigned int dummy
;
13845 const gdb_byte
*buffer
;
13846 CORE_ADDR baseaddr
;
13848 if (cu_header
->version
>= 5)
13849 return dwarf2_rnglists_process (offset
, cu
, callback
);
13851 base
= cu
->base_address
;
13853 per_objfile
->per_bfd
->ranges
.read (objfile
);
13854 if (offset
>= per_objfile
->per_bfd
->ranges
.size
)
13856 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
13860 buffer
= per_objfile
->per_bfd
->ranges
.buffer
+ offset
;
13862 baseaddr
= objfile
->text_section_offset ();
13866 CORE_ADDR range_beginning
, range_end
;
13868 range_beginning
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
13869 buffer
+= addr_size
;
13870 range_end
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
13871 buffer
+= addr_size
;
13872 offset
+= 2 * addr_size
;
13874 /* An end of list marker is a pair of zero addresses. */
13875 if (range_beginning
== 0 && range_end
== 0)
13876 /* Found the end of list entry. */
13879 /* Each base address selection entry is a pair of 2 values.
13880 The first is the largest possible address, the second is
13881 the base address. Check for a base address here. */
13882 if ((range_beginning
& mask
) == mask
)
13884 /* If we found the largest possible address, then we already
13885 have the base address in range_end. */
13890 if (!base
.has_value ())
13892 /* We have no valid base address for the ranges
13894 complaint (_("Invalid .debug_ranges data (no base address)"));
13898 if (range_beginning
> range_end
)
13900 /* Inverted range entries are invalid. */
13901 complaint (_("Invalid .debug_ranges data (inverted range)"));
13905 /* Empty range entries have no effect. */
13906 if (range_beginning
== range_end
)
13909 range_beginning
+= *base
;
13910 range_end
+= *base
;
13912 /* A not-uncommon case of bad debug info.
13913 Don't pollute the addrmap with bad data. */
13914 if (range_beginning
+ baseaddr
== 0
13915 && !per_objfile
->per_bfd
->has_section_at_zero
)
13917 complaint (_(".debug_ranges entry has start address of zero"
13918 " [in module %s]"), objfile_name (objfile
));
13922 callback (range_beginning
, range_end
);
13928 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
13929 Return 1 if the attributes are present and valid, otherwise, return 0.
13930 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
13933 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
13934 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
13935 dwarf2_psymtab
*ranges_pst
)
13937 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
13938 struct gdbarch
*gdbarch
= objfile
->arch ();
13939 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
13942 CORE_ADDR high
= 0;
13945 retval
= dwarf2_ranges_process (offset
, cu
,
13946 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
13948 if (ranges_pst
!= NULL
)
13953 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
13954 range_beginning
+ baseaddr
)
13956 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
13957 range_end
+ baseaddr
)
13959 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
13960 lowpc
, highpc
- 1, ranges_pst
);
13963 /* FIXME: This is recording everything as a low-high
13964 segment of consecutive addresses. We should have a
13965 data structure for discontiguous block ranges
13969 low
= range_beginning
;
13975 if (range_beginning
< low
)
13976 low
= range_beginning
;
13977 if (range_end
> high
)
13985 /* If the first entry is an end-of-list marker, the range
13986 describes an empty scope, i.e. no instructions. */
13992 *high_return
= high
;
13996 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
13997 definition for the return value. *LOWPC and *HIGHPC are set iff
13998 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14000 static enum pc_bounds_kind
14001 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14002 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14003 dwarf2_psymtab
*pst
)
14005 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
14006 struct attribute
*attr
;
14007 struct attribute
*attr_high
;
14009 CORE_ADDR high
= 0;
14010 enum pc_bounds_kind ret
;
14012 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14015 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14016 if (attr
!= nullptr)
14018 low
= attr
->value_as_address ();
14019 high
= attr_high
->value_as_address ();
14020 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
14024 /* Found high w/o low attribute. */
14025 return PC_BOUNDS_INVALID
;
14027 /* Found consecutive range of addresses. */
14028 ret
= PC_BOUNDS_HIGH_LOW
;
14032 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14035 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
14036 We take advantage of the fact that DW_AT_ranges does not appear
14037 in DW_TAG_compile_unit of DWO files. */
14038 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14039 unsigned int ranges_offset
= (DW_UNSND (attr
)
14040 + (need_ranges_base
14044 /* Value of the DW_AT_ranges attribute is the offset in the
14045 .debug_ranges section. */
14046 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
14047 return PC_BOUNDS_INVALID
;
14048 /* Found discontinuous range of addresses. */
14049 ret
= PC_BOUNDS_RANGES
;
14052 return PC_BOUNDS_NOT_PRESENT
;
14055 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14057 return PC_BOUNDS_INVALID
;
14059 /* When using the GNU linker, .gnu.linkonce. sections are used to
14060 eliminate duplicate copies of functions and vtables and such.
14061 The linker will arbitrarily choose one and discard the others.
14062 The AT_*_pc values for such functions refer to local labels in
14063 these sections. If the section from that file was discarded, the
14064 labels are not in the output, so the relocs get a value of 0.
14065 If this is a discarded function, mark the pc bounds as invalid,
14066 so that GDB will ignore it. */
14067 if (low
== 0 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
14068 return PC_BOUNDS_INVALID
;
14076 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14077 its low and high PC addresses. Do nothing if these addresses could not
14078 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14079 and HIGHPC to the high address if greater than HIGHPC. */
14082 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14083 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14084 struct dwarf2_cu
*cu
)
14086 CORE_ADDR low
, high
;
14087 struct die_info
*child
= die
->child
;
14089 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14091 *lowpc
= std::min (*lowpc
, low
);
14092 *highpc
= std::max (*highpc
, high
);
14095 /* If the language does not allow nested subprograms (either inside
14096 subprograms or lexical blocks), we're done. */
14097 if (cu
->language
!= language_ada
)
14100 /* Check all the children of the given DIE. If it contains nested
14101 subprograms, then check their pc bounds. Likewise, we need to
14102 check lexical blocks as well, as they may also contain subprogram
14104 while (child
&& child
->tag
)
14106 if (child
->tag
== DW_TAG_subprogram
14107 || child
->tag
== DW_TAG_lexical_block
)
14108 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14109 child
= child
->sibling
;
14113 /* Get the low and high pc's represented by the scope DIE, and store
14114 them in *LOWPC and *HIGHPC. If the correct values can't be
14115 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14118 get_scope_pc_bounds (struct die_info
*die
,
14119 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14120 struct dwarf2_cu
*cu
)
14122 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14123 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14124 CORE_ADDR current_low
, current_high
;
14126 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14127 >= PC_BOUNDS_RANGES
)
14129 best_low
= current_low
;
14130 best_high
= current_high
;
14134 struct die_info
*child
= die
->child
;
14136 while (child
&& child
->tag
)
14138 switch (child
->tag
) {
14139 case DW_TAG_subprogram
:
14140 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14142 case DW_TAG_namespace
:
14143 case DW_TAG_module
:
14144 /* FIXME: carlton/2004-01-16: Should we do this for
14145 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14146 that current GCC's always emit the DIEs corresponding
14147 to definitions of methods of classes as children of a
14148 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14149 the DIEs giving the declarations, which could be
14150 anywhere). But I don't see any reason why the
14151 standards says that they have to be there. */
14152 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14154 if (current_low
!= ((CORE_ADDR
) -1))
14156 best_low
= std::min (best_low
, current_low
);
14157 best_high
= std::max (best_high
, current_high
);
14165 child
= child
->sibling
;
14170 *highpc
= best_high
;
14173 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14177 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14178 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14180 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
14181 struct gdbarch
*gdbarch
= objfile
->arch ();
14182 struct attribute
*attr
;
14183 struct attribute
*attr_high
;
14185 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14188 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14189 if (attr
!= nullptr)
14191 CORE_ADDR low
= attr
->value_as_address ();
14192 CORE_ADDR high
= attr_high
->value_as_address ();
14194 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
14197 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14198 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14199 cu
->get_builder ()->record_block_range (block
, low
, high
- 1);
14203 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14204 if (attr
!= nullptr)
14206 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
14207 We take advantage of the fact that DW_AT_ranges does not appear
14208 in DW_TAG_compile_unit of DWO files. */
14209 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14211 /* The value of the DW_AT_ranges attribute is the offset of the
14212 address range list in the .debug_ranges section. */
14213 unsigned long offset
= (DW_UNSND (attr
)
14214 + (need_ranges_base
? cu
->ranges_base
: 0));
14216 std::vector
<blockrange
> blockvec
;
14217 dwarf2_ranges_process (offset
, cu
,
14218 [&] (CORE_ADDR start
, CORE_ADDR end
)
14222 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14223 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14224 cu
->get_builder ()->record_block_range (block
, start
, end
- 1);
14225 blockvec
.emplace_back (start
, end
);
14228 BLOCK_RANGES(block
) = make_blockranges (objfile
, blockvec
);
14232 /* Check whether the producer field indicates either of GCC < 4.6, or the
14233 Intel C/C++ compiler, and cache the result in CU. */
14236 check_producer (struct dwarf2_cu
*cu
)
14240 if (cu
->producer
== NULL
)
14242 /* For unknown compilers expect their behavior is DWARF version
14245 GCC started to support .debug_types sections by -gdwarf-4 since
14246 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14247 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14248 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14249 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14251 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14253 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14254 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14256 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14258 cu
->producer_is_icc
= true;
14259 cu
->producer_is_icc_lt_14
= major
< 14;
14261 else if (startswith (cu
->producer
, "CodeWarrior S12/L-ISA"))
14262 cu
->producer_is_codewarrior
= true;
14265 /* For other non-GCC compilers, expect their behavior is DWARF version
14269 cu
->checked_producer
= true;
14272 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14273 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14274 during 4.6.0 experimental. */
14277 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14279 if (!cu
->checked_producer
)
14280 check_producer (cu
);
14282 return cu
->producer_is_gxx_lt_4_6
;
14286 /* Codewarrior (at least as of version 5.0.40) generates dwarf line information
14287 with incorrect is_stmt attributes. */
14290 producer_is_codewarrior (struct dwarf2_cu
*cu
)
14292 if (!cu
->checked_producer
)
14293 check_producer (cu
);
14295 return cu
->producer_is_codewarrior
;
14298 /* Return the default accessibility type if it is not overridden by
14299 DW_AT_accessibility. */
14301 static enum dwarf_access_attribute
14302 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14304 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14306 /* The default DWARF 2 accessibility for members is public, the default
14307 accessibility for inheritance is private. */
14309 if (die
->tag
!= DW_TAG_inheritance
)
14310 return DW_ACCESS_public
;
14312 return DW_ACCESS_private
;
14316 /* DWARF 3+ defines the default accessibility a different way. The same
14317 rules apply now for DW_TAG_inheritance as for the members and it only
14318 depends on the container kind. */
14320 if (die
->parent
->tag
== DW_TAG_class_type
)
14321 return DW_ACCESS_private
;
14323 return DW_ACCESS_public
;
14327 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14328 offset. If the attribute was not found return 0, otherwise return
14329 1. If it was found but could not properly be handled, set *OFFSET
14333 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14336 struct attribute
*attr
;
14338 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14343 /* Note that we do not check for a section offset first here.
14344 This is because DW_AT_data_member_location is new in DWARF 4,
14345 so if we see it, we can assume that a constant form is really
14346 a constant and not a section offset. */
14347 if (attr
->form_is_constant ())
14348 *offset
= attr
->constant_value (0);
14349 else if (attr
->form_is_section_offset ())
14350 dwarf2_complex_location_expr_complaint ();
14351 else if (attr
->form_is_block ())
14352 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14354 dwarf2_complex_location_expr_complaint ();
14362 /* Look for DW_AT_data_member_location and store the results in FIELD. */
14365 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14366 struct field
*field
)
14368 struct attribute
*attr
;
14370 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14373 if (attr
->form_is_constant ())
14375 LONGEST offset
= attr
->constant_value (0);
14376 SET_FIELD_BITPOS (*field
, offset
* bits_per_byte
);
14378 else if (attr
->form_is_section_offset ())
14379 dwarf2_complex_location_expr_complaint ();
14380 else if (attr
->form_is_block ())
14383 CORE_ADDR offset
= decode_locdesc (DW_BLOCK (attr
), cu
, &handled
);
14385 SET_FIELD_BITPOS (*field
, offset
* bits_per_byte
);
14388 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
14389 struct objfile
*objfile
= per_objfile
->objfile
;
14390 struct dwarf2_locexpr_baton
*dlbaton
14391 = XOBNEW (&objfile
->objfile_obstack
,
14392 struct dwarf2_locexpr_baton
);
14393 dlbaton
->data
= DW_BLOCK (attr
)->data
;
14394 dlbaton
->size
= DW_BLOCK (attr
)->size
;
14395 /* When using this baton, we want to compute the address
14396 of the field, not the value. This is why
14397 is_reference is set to false here. */
14398 dlbaton
->is_reference
= false;
14399 dlbaton
->per_objfile
= per_objfile
;
14400 dlbaton
->per_cu
= cu
->per_cu
;
14402 SET_FIELD_DWARF_BLOCK (*field
, dlbaton
);
14406 dwarf2_complex_location_expr_complaint ();
14410 /* Add an aggregate field to the field list. */
14413 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14414 struct dwarf2_cu
*cu
)
14416 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
14417 struct gdbarch
*gdbarch
= objfile
->arch ();
14418 struct nextfield
*new_field
;
14419 struct attribute
*attr
;
14421 const char *fieldname
= "";
14423 if (die
->tag
== DW_TAG_inheritance
)
14425 fip
->baseclasses
.emplace_back ();
14426 new_field
= &fip
->baseclasses
.back ();
14430 fip
->fields
.emplace_back ();
14431 new_field
= &fip
->fields
.back ();
14434 new_field
->offset
= die
->sect_off
;
14436 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14437 if (attr
!= nullptr)
14438 new_field
->accessibility
= DW_UNSND (attr
);
14440 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
14441 if (new_field
->accessibility
!= DW_ACCESS_public
)
14442 fip
->non_public_fields
= 1;
14444 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14445 if (attr
!= nullptr)
14446 new_field
->virtuality
= DW_UNSND (attr
);
14448 new_field
->virtuality
= DW_VIRTUALITY_none
;
14450 fp
= &new_field
->field
;
14452 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
14454 /* Data member other than a C++ static data member. */
14456 /* Get type of field. */
14457 fp
->type
= die_type (die
, cu
);
14459 SET_FIELD_BITPOS (*fp
, 0);
14461 /* Get bit size of field (zero if none). */
14462 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
14463 if (attr
!= nullptr)
14465 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
14469 FIELD_BITSIZE (*fp
) = 0;
14472 /* Get bit offset of field. */
14473 handle_data_member_location (die
, cu
, fp
);
14474 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
14475 if (attr
!= nullptr)
14477 if (gdbarch_byte_order (gdbarch
) == BFD_ENDIAN_BIG
)
14479 /* For big endian bits, the DW_AT_bit_offset gives the
14480 additional bit offset from the MSB of the containing
14481 anonymous object to the MSB of the field. We don't
14482 have to do anything special since we don't need to
14483 know the size of the anonymous object. */
14484 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
14488 /* For little endian bits, compute the bit offset to the
14489 MSB of the anonymous object, subtract off the number of
14490 bits from the MSB of the field to the MSB of the
14491 object, and then subtract off the number of bits of
14492 the field itself. The result is the bit offset of
14493 the LSB of the field. */
14494 int anonymous_size
;
14495 int bit_offset
= DW_UNSND (attr
);
14497 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14498 if (attr
!= nullptr)
14500 /* The size of the anonymous object containing
14501 the bit field is explicit, so use the
14502 indicated size (in bytes). */
14503 anonymous_size
= DW_UNSND (attr
);
14507 /* The size of the anonymous object containing
14508 the bit field must be inferred from the type
14509 attribute of the data member containing the
14511 anonymous_size
= TYPE_LENGTH (fp
->type
);
14513 SET_FIELD_BITPOS (*fp
,
14514 (FIELD_BITPOS (*fp
)
14515 + anonymous_size
* bits_per_byte
14516 - bit_offset
- FIELD_BITSIZE (*fp
)));
14519 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
14521 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
14522 + attr
->constant_value (0)));
14524 /* Get name of field. */
14525 fieldname
= dwarf2_name (die
, cu
);
14526 if (fieldname
== NULL
)
14529 /* The name is already allocated along with this objfile, so we don't
14530 need to duplicate it for the type. */
14531 fp
->name
= fieldname
;
14533 /* Change accessibility for artificial fields (e.g. virtual table
14534 pointer or virtual base class pointer) to private. */
14535 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
14537 FIELD_ARTIFICIAL (*fp
) = 1;
14538 new_field
->accessibility
= DW_ACCESS_private
;
14539 fip
->non_public_fields
= 1;
14542 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
14544 /* C++ static member. */
14546 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
14547 is a declaration, but all versions of G++ as of this writing
14548 (so through at least 3.2.1) incorrectly generate
14549 DW_TAG_variable tags. */
14551 const char *physname
;
14553 /* Get name of field. */
14554 fieldname
= dwarf2_name (die
, cu
);
14555 if (fieldname
== NULL
)
14558 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
14560 /* Only create a symbol if this is an external value.
14561 new_symbol checks this and puts the value in the global symbol
14562 table, which we want. If it is not external, new_symbol
14563 will try to put the value in cu->list_in_scope which is wrong. */
14564 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
14566 /* A static const member, not much different than an enum as far as
14567 we're concerned, except that we can support more types. */
14568 new_symbol (die
, NULL
, cu
);
14571 /* Get physical name. */
14572 physname
= dwarf2_physname (fieldname
, die
, cu
);
14574 /* The name is already allocated along with this objfile, so we don't
14575 need to duplicate it for the type. */
14576 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
14577 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14578 FIELD_NAME (*fp
) = fieldname
;
14580 else if (die
->tag
== DW_TAG_inheritance
)
14582 /* C++ base class field. */
14583 handle_data_member_location (die
, cu
, fp
);
14584 FIELD_BITSIZE (*fp
) = 0;
14585 FIELD_TYPE (*fp
) = die_type (die
, cu
);
14586 FIELD_NAME (*fp
) = fp
->type
->name ();
14589 gdb_assert_not_reached ("missing case in dwarf2_add_field");
14592 /* Can the type given by DIE define another type? */
14595 type_can_define_types (const struct die_info
*die
)
14599 case DW_TAG_typedef
:
14600 case DW_TAG_class_type
:
14601 case DW_TAG_structure_type
:
14602 case DW_TAG_union_type
:
14603 case DW_TAG_enumeration_type
:
14611 /* Add a type definition defined in the scope of the FIP's class. */
14614 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
14615 struct dwarf2_cu
*cu
)
14617 struct decl_field fp
;
14618 memset (&fp
, 0, sizeof (fp
));
14620 gdb_assert (type_can_define_types (die
));
14622 /* Get name of field. NULL is okay here, meaning an anonymous type. */
14623 fp
.name
= dwarf2_name (die
, cu
);
14624 fp
.type
= read_type_die (die
, cu
);
14626 /* Save accessibility. */
14627 enum dwarf_access_attribute accessibility
;
14628 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14630 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
14632 accessibility
= dwarf2_default_access_attribute (die
, cu
);
14633 switch (accessibility
)
14635 case DW_ACCESS_public
:
14636 /* The assumed value if neither private nor protected. */
14638 case DW_ACCESS_private
:
14641 case DW_ACCESS_protected
:
14642 fp
.is_protected
= 1;
14645 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
14648 if (die
->tag
== DW_TAG_typedef
)
14649 fip
->typedef_field_list
.push_back (fp
);
14651 fip
->nested_types_list
.push_back (fp
);
14654 /* A convenience typedef that's used when finding the discriminant
14655 field for a variant part. */
14656 typedef std::unordered_map
<sect_offset
, int, gdb::hash_enum
<sect_offset
>>
14659 /* Compute the discriminant range for a given variant. OBSTACK is
14660 where the results will be stored. VARIANT is the variant to
14661 process. IS_UNSIGNED indicates whether the discriminant is signed
14664 static const gdb::array_view
<discriminant_range
>
14665 convert_variant_range (struct obstack
*obstack
, const variant_field
&variant
,
14668 std::vector
<discriminant_range
> ranges
;
14670 if (variant
.default_branch
)
14673 if (variant
.discr_list_data
== nullptr)
14675 discriminant_range r
14676 = {variant
.discriminant_value
, variant
.discriminant_value
};
14677 ranges
.push_back (r
);
14681 gdb::array_view
<const gdb_byte
> data (variant
.discr_list_data
->data
,
14682 variant
.discr_list_data
->size
);
14683 while (!data
.empty ())
14685 if (data
[0] != DW_DSC_range
&& data
[0] != DW_DSC_label
)
14687 complaint (_("invalid discriminant marker: %d"), data
[0]);
14690 bool is_range
= data
[0] == DW_DSC_range
;
14691 data
= data
.slice (1);
14693 ULONGEST low
, high
;
14694 unsigned int bytes_read
;
14698 complaint (_("DW_AT_discr_list missing low value"));
14702 low
= read_unsigned_leb128 (nullptr, data
.data (), &bytes_read
);
14704 low
= (ULONGEST
) read_signed_leb128 (nullptr, data
.data (),
14706 data
= data
.slice (bytes_read
);
14712 complaint (_("DW_AT_discr_list missing high value"));
14716 high
= read_unsigned_leb128 (nullptr, data
.data (),
14719 high
= (LONGEST
) read_signed_leb128 (nullptr, data
.data (),
14721 data
= data
.slice (bytes_read
);
14726 ranges
.push_back ({ low
, high
});
14730 discriminant_range
*result
= XOBNEWVEC (obstack
, discriminant_range
,
14732 std::copy (ranges
.begin (), ranges
.end (), result
);
14733 return gdb::array_view
<discriminant_range
> (result
, ranges
.size ());
14736 static const gdb::array_view
<variant_part
> create_variant_parts
14737 (struct obstack
*obstack
,
14738 const offset_map_type
&offset_map
,
14739 struct field_info
*fi
,
14740 const std::vector
<variant_part_builder
> &variant_parts
);
14742 /* Fill in a "struct variant" for a given variant field. RESULT is
14743 the variant to fill in. OBSTACK is where any needed allocations
14744 will be done. OFFSET_MAP holds the mapping from section offsets to
14745 fields for the type. FI describes the fields of the type we're
14746 processing. FIELD is the variant field we're converting. */
14749 create_one_variant (variant
&result
, struct obstack
*obstack
,
14750 const offset_map_type
&offset_map
,
14751 struct field_info
*fi
, const variant_field
&field
)
14753 result
.discriminants
= convert_variant_range (obstack
, field
, false);
14754 result
.first_field
= field
.first_field
+ fi
->baseclasses
.size ();
14755 result
.last_field
= field
.last_field
+ fi
->baseclasses
.size ();
14756 result
.parts
= create_variant_parts (obstack
, offset_map
, fi
,
14757 field
.variant_parts
);
14760 /* Fill in a "struct variant_part" for a given variant part. RESULT
14761 is the variant part to fill in. OBSTACK is where any needed
14762 allocations will be done. OFFSET_MAP holds the mapping from
14763 section offsets to fields for the type. FI describes the fields of
14764 the type we're processing. BUILDER is the variant part to be
14768 create_one_variant_part (variant_part
&result
,
14769 struct obstack
*obstack
,
14770 const offset_map_type
&offset_map
,
14771 struct field_info
*fi
,
14772 const variant_part_builder
&builder
)
14774 auto iter
= offset_map
.find (builder
.discriminant_offset
);
14775 if (iter
== offset_map
.end ())
14777 result
.discriminant_index
= -1;
14778 /* Doesn't matter. */
14779 result
.is_unsigned
= false;
14783 result
.discriminant_index
= iter
->second
;
14785 = TYPE_UNSIGNED (FIELD_TYPE
14786 (fi
->fields
[result
.discriminant_index
].field
));
14789 size_t n
= builder
.variants
.size ();
14790 variant
*output
= new (obstack
) variant
[n
];
14791 for (size_t i
= 0; i
< n
; ++i
)
14792 create_one_variant (output
[i
], obstack
, offset_map
, fi
,
14793 builder
.variants
[i
]);
14795 result
.variants
= gdb::array_view
<variant
> (output
, n
);
14798 /* Create a vector of variant parts that can be attached to a type.
14799 OBSTACK is where any needed allocations will be done. OFFSET_MAP
14800 holds the mapping from section offsets to fields for the type. FI
14801 describes the fields of the type we're processing. VARIANT_PARTS
14802 is the vector to convert. */
14804 static const gdb::array_view
<variant_part
>
14805 create_variant_parts (struct obstack
*obstack
,
14806 const offset_map_type
&offset_map
,
14807 struct field_info
*fi
,
14808 const std::vector
<variant_part_builder
> &variant_parts
)
14810 if (variant_parts
.empty ())
14813 size_t n
= variant_parts
.size ();
14814 variant_part
*result
= new (obstack
) variant_part
[n
];
14815 for (size_t i
= 0; i
< n
; ++i
)
14816 create_one_variant_part (result
[i
], obstack
, offset_map
, fi
,
14819 return gdb::array_view
<variant_part
> (result
, n
);
14822 /* Compute the variant part vector for FIP, attaching it to TYPE when
14826 add_variant_property (struct field_info
*fip
, struct type
*type
,
14827 struct dwarf2_cu
*cu
)
14829 /* Map section offsets of fields to their field index. Note the
14830 field index here does not take the number of baseclasses into
14832 offset_map_type offset_map
;
14833 for (int i
= 0; i
< fip
->fields
.size (); ++i
)
14834 offset_map
[fip
->fields
[i
].offset
] = i
;
14836 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
14837 gdb::array_view
<variant_part
> parts
14838 = create_variant_parts (&objfile
->objfile_obstack
, offset_map
, fip
,
14839 fip
->variant_parts
);
14841 struct dynamic_prop prop
;
14842 prop
.kind
= PROP_VARIANT_PARTS
;
14843 prop
.data
.variant_parts
14844 = ((gdb::array_view
<variant_part
> *)
14845 obstack_copy (&objfile
->objfile_obstack
, &parts
, sizeof (parts
)));
14847 type
->add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
);
14850 /* Create the vector of fields, and attach it to the type. */
14853 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
14854 struct dwarf2_cu
*cu
)
14856 int nfields
= fip
->nfields ();
14858 /* Record the field count, allocate space for the array of fields,
14859 and create blank accessibility bitfields if necessary. */
14860 type
->set_num_fields (nfields
);
14862 ((struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
));
14864 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
14866 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14868 TYPE_FIELD_PRIVATE_BITS (type
) =
14869 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14870 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
14872 TYPE_FIELD_PROTECTED_BITS (type
) =
14873 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14874 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
14876 TYPE_FIELD_IGNORE_BITS (type
) =
14877 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
14878 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
14881 /* If the type has baseclasses, allocate and clear a bit vector for
14882 TYPE_FIELD_VIRTUAL_BITS. */
14883 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
14885 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
14886 unsigned char *pointer
;
14888 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
14889 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
14890 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
14891 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
14892 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
14895 if (!fip
->variant_parts
.empty ())
14896 add_variant_property (fip
, type
, cu
);
14898 /* Copy the saved-up fields into the field vector. */
14899 for (int i
= 0; i
< nfields
; ++i
)
14901 struct nextfield
&field
14902 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
14903 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
14905 type
->field (i
) = field
.field
;
14906 switch (field
.accessibility
)
14908 case DW_ACCESS_private
:
14909 if (cu
->language
!= language_ada
)
14910 SET_TYPE_FIELD_PRIVATE (type
, i
);
14913 case DW_ACCESS_protected
:
14914 if (cu
->language
!= language_ada
)
14915 SET_TYPE_FIELD_PROTECTED (type
, i
);
14918 case DW_ACCESS_public
:
14922 /* Unknown accessibility. Complain and treat it as public. */
14924 complaint (_("unsupported accessibility %d"),
14925 field
.accessibility
);
14929 if (i
< fip
->baseclasses
.size ())
14931 switch (field
.virtuality
)
14933 case DW_VIRTUALITY_virtual
:
14934 case DW_VIRTUALITY_pure_virtual
:
14935 if (cu
->language
== language_ada
)
14936 error (_("unexpected virtuality in component of Ada type"));
14937 SET_TYPE_FIELD_VIRTUAL (type
, i
);
14944 /* Return true if this member function is a constructor, false
14948 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
14950 const char *fieldname
;
14951 const char *type_name
;
14954 if (die
->parent
== NULL
)
14957 if (die
->parent
->tag
!= DW_TAG_structure_type
14958 && die
->parent
->tag
!= DW_TAG_union_type
14959 && die
->parent
->tag
!= DW_TAG_class_type
)
14962 fieldname
= dwarf2_name (die
, cu
);
14963 type_name
= dwarf2_name (die
->parent
, cu
);
14964 if (fieldname
== NULL
|| type_name
== NULL
)
14967 len
= strlen (fieldname
);
14968 return (strncmp (fieldname
, type_name
, len
) == 0
14969 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
14972 /* Check if the given VALUE is a recognized enum
14973 dwarf_defaulted_attribute constant according to DWARF5 spec,
14977 is_valid_DW_AT_defaulted (ULONGEST value
)
14981 case DW_DEFAULTED_no
:
14982 case DW_DEFAULTED_in_class
:
14983 case DW_DEFAULTED_out_of_class
:
14987 complaint (_("unrecognized DW_AT_defaulted value (%s)"), pulongest (value
));
14991 /* Add a member function to the proper fieldlist. */
14994 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
14995 struct type
*type
, struct dwarf2_cu
*cu
)
14997 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
14998 struct attribute
*attr
;
15000 struct fnfieldlist
*flp
= nullptr;
15001 struct fn_field
*fnp
;
15002 const char *fieldname
;
15003 struct type
*this_type
;
15004 enum dwarf_access_attribute accessibility
;
15006 if (cu
->language
== language_ada
)
15007 error (_("unexpected member function in Ada type"));
15009 /* Get name of member function. */
15010 fieldname
= dwarf2_name (die
, cu
);
15011 if (fieldname
== NULL
)
15014 /* Look up member function name in fieldlist. */
15015 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15017 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15019 flp
= &fip
->fnfieldlists
[i
];
15024 /* Create a new fnfieldlist if necessary. */
15025 if (flp
== nullptr)
15027 fip
->fnfieldlists
.emplace_back ();
15028 flp
= &fip
->fnfieldlists
.back ();
15029 flp
->name
= fieldname
;
15030 i
= fip
->fnfieldlists
.size () - 1;
15033 /* Create a new member function field and add it to the vector of
15035 flp
->fnfields
.emplace_back ();
15036 fnp
= &flp
->fnfields
.back ();
15038 /* Delay processing of the physname until later. */
15039 if (cu
->language
== language_cplus
)
15040 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15044 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15045 fnp
->physname
= physname
? physname
: "";
15048 fnp
->type
= alloc_type (objfile
);
15049 this_type
= read_type_die (die
, cu
);
15050 if (this_type
&& this_type
->code () == TYPE_CODE_FUNC
)
15052 int nparams
= this_type
->num_fields ();
15054 /* TYPE is the domain of this method, and THIS_TYPE is the type
15055 of the method itself (TYPE_CODE_METHOD). */
15056 smash_to_method_type (fnp
->type
, type
,
15057 TYPE_TARGET_TYPE (this_type
),
15058 this_type
->fields (),
15059 this_type
->num_fields (),
15060 TYPE_VARARGS (this_type
));
15062 /* Handle static member functions.
15063 Dwarf2 has no clean way to discern C++ static and non-static
15064 member functions. G++ helps GDB by marking the first
15065 parameter for non-static member functions (which is the this
15066 pointer) as artificial. We obtain this information from
15067 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15068 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15069 fnp
->voffset
= VOFFSET_STATIC
;
15072 complaint (_("member function type missing for '%s'"),
15073 dwarf2_full_name (fieldname
, die
, cu
));
15075 /* Get fcontext from DW_AT_containing_type if present. */
15076 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15077 fnp
->fcontext
= die_containing_type (die
, cu
);
15079 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15080 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15082 /* Get accessibility. */
15083 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15084 if (attr
!= nullptr)
15085 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15087 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15088 switch (accessibility
)
15090 case DW_ACCESS_private
:
15091 fnp
->is_private
= 1;
15093 case DW_ACCESS_protected
:
15094 fnp
->is_protected
= 1;
15098 /* Check for artificial methods. */
15099 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15100 if (attr
&& DW_UNSND (attr
) != 0)
15101 fnp
->is_artificial
= 1;
15103 /* Check for defaulted methods. */
15104 attr
= dwarf2_attr (die
, DW_AT_defaulted
, cu
);
15105 if (attr
!= nullptr && is_valid_DW_AT_defaulted (DW_UNSND (attr
)))
15106 fnp
->defaulted
= (enum dwarf_defaulted_attribute
) DW_UNSND (attr
);
15108 /* Check for deleted methods. */
15109 attr
= dwarf2_attr (die
, DW_AT_deleted
, cu
);
15110 if (attr
!= nullptr && DW_UNSND (attr
) != 0)
15111 fnp
->is_deleted
= 1;
15113 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15115 /* Get index in virtual function table if it is a virtual member
15116 function. For older versions of GCC, this is an offset in the
15117 appropriate virtual table, as specified by DW_AT_containing_type.
15118 For everyone else, it is an expression to be evaluated relative
15119 to the object address. */
15121 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15122 if (attr
!= nullptr)
15124 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
> 0)
15126 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15128 /* Old-style GCC. */
15129 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15131 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15132 || (DW_BLOCK (attr
)->size
> 1
15133 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15134 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15136 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15137 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15138 dwarf2_complex_location_expr_complaint ();
15140 fnp
->voffset
/= cu
->header
.addr_size
;
15144 dwarf2_complex_location_expr_complaint ();
15146 if (!fnp
->fcontext
)
15148 /* If there is no `this' field and no DW_AT_containing_type,
15149 we cannot actually find a base class context for the
15151 if (this_type
->num_fields () == 0
15152 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15154 complaint (_("cannot determine context for virtual member "
15155 "function \"%s\" (offset %s)"),
15156 fieldname
, sect_offset_str (die
->sect_off
));
15161 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15165 else if (attr
->form_is_section_offset ())
15167 dwarf2_complex_location_expr_complaint ();
15171 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15177 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15178 if (attr
&& DW_UNSND (attr
))
15180 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15181 complaint (_("Member function \"%s\" (offset %s) is virtual "
15182 "but the vtable offset is not specified"),
15183 fieldname
, sect_offset_str (die
->sect_off
));
15184 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15185 TYPE_CPLUS_DYNAMIC (type
) = 1;
15190 /* Create the vector of member function fields, and attach it to the type. */
15193 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15194 struct dwarf2_cu
*cu
)
15196 if (cu
->language
== language_ada
)
15197 error (_("unexpected member functions in Ada type"));
15199 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15200 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15202 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15204 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15206 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15207 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15209 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15210 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15211 fn_flp
->fn_fields
= (struct fn_field
*)
15212 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15214 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15215 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15218 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15221 /* Returns non-zero if NAME is the name of a vtable member in CU's
15222 language, zero otherwise. */
15224 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15226 static const char vptr
[] = "_vptr";
15228 /* Look for the C++ form of the vtable. */
15229 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15235 /* GCC outputs unnamed structures that are really pointers to member
15236 functions, with the ABI-specified layout. If TYPE describes
15237 such a structure, smash it into a member function type.
15239 GCC shouldn't do this; it should just output pointer to member DIEs.
15240 This is GCC PR debug/28767. */
15243 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15245 struct type
*pfn_type
, *self_type
, *new_type
;
15247 /* Check for a structure with no name and two children. */
15248 if (type
->code () != TYPE_CODE_STRUCT
|| type
->num_fields () != 2)
15251 /* Check for __pfn and __delta members. */
15252 if (TYPE_FIELD_NAME (type
, 0) == NULL
15253 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15254 || TYPE_FIELD_NAME (type
, 1) == NULL
15255 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15258 /* Find the type of the method. */
15259 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15260 if (pfn_type
== NULL
15261 || pfn_type
->code () != TYPE_CODE_PTR
15262 || TYPE_TARGET_TYPE (pfn_type
)->code () != TYPE_CODE_FUNC
)
15265 /* Look for the "this" argument. */
15266 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15267 if (pfn_type
->num_fields () == 0
15268 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15269 || TYPE_FIELD_TYPE (pfn_type
, 0)->code () != TYPE_CODE_PTR
)
15272 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15273 new_type
= alloc_type (objfile
);
15274 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15275 pfn_type
->fields (), pfn_type
->num_fields (),
15276 TYPE_VARARGS (pfn_type
));
15277 smash_to_methodptr_type (type
, new_type
);
15280 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15281 appropriate error checking and issuing complaints if there is a
15285 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15287 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15289 if (attr
== nullptr)
15292 if (!attr
->form_is_constant ())
15294 complaint (_("DW_AT_alignment must have constant form"
15295 " - DIE at %s [in module %s]"),
15296 sect_offset_str (die
->sect_off
),
15297 objfile_name (cu
->per_objfile
->objfile
));
15302 if (attr
->form
== DW_FORM_sdata
)
15304 LONGEST val
= DW_SND (attr
);
15307 complaint (_("DW_AT_alignment value must not be negative"
15308 " - DIE at %s [in module %s]"),
15309 sect_offset_str (die
->sect_off
),
15310 objfile_name (cu
->per_objfile
->objfile
));
15316 align
= DW_UNSND (attr
);
15320 complaint (_("DW_AT_alignment value must not be zero"
15321 " - DIE at %s [in module %s]"),
15322 sect_offset_str (die
->sect_off
),
15323 objfile_name (cu
->per_objfile
->objfile
));
15326 if ((align
& (align
- 1)) != 0)
15328 complaint (_("DW_AT_alignment value must be a power of 2"
15329 " - DIE at %s [in module %s]"),
15330 sect_offset_str (die
->sect_off
),
15331 objfile_name (cu
->per_objfile
->objfile
));
15338 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15339 the alignment for TYPE. */
15342 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15345 if (!set_type_align (type
, get_alignment (cu
, die
)))
15346 complaint (_("DW_AT_alignment value too large"
15347 " - DIE at %s [in module %s]"),
15348 sect_offset_str (die
->sect_off
),
15349 objfile_name (cu
->per_objfile
->objfile
));
15352 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15353 constant for a type, according to DWARF5 spec, Table 5.5. */
15356 is_valid_DW_AT_calling_convention_for_type (ULONGEST value
)
15361 case DW_CC_pass_by_reference
:
15362 case DW_CC_pass_by_value
:
15366 complaint (_("unrecognized DW_AT_calling_convention value "
15367 "(%s) for a type"), pulongest (value
));
15372 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15373 constant for a subroutine, according to DWARF5 spec, Table 3.3, and
15374 also according to GNU-specific values (see include/dwarf2.h). */
15377 is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value
)
15382 case DW_CC_program
:
15386 case DW_CC_GNU_renesas_sh
:
15387 case DW_CC_GNU_borland_fastcall_i386
:
15388 case DW_CC_GDB_IBM_OpenCL
:
15392 complaint (_("unrecognized DW_AT_calling_convention value "
15393 "(%s) for a subroutine"), pulongest (value
));
15398 /* Called when we find the DIE that starts a structure or union scope
15399 (definition) to create a type for the structure or union. Fill in
15400 the type's name and general properties; the members will not be
15401 processed until process_structure_scope. A symbol table entry for
15402 the type will also not be done until process_structure_scope (assuming
15403 the type has a name).
15405 NOTE: we need to call these functions regardless of whether or not the
15406 DIE has a DW_AT_name attribute, since it might be an anonymous
15407 structure or union. This gets the type entered into our set of
15408 user defined types. */
15410 static struct type
*
15411 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15413 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
15415 struct attribute
*attr
;
15418 /* If the definition of this type lives in .debug_types, read that type.
15419 Don't follow DW_AT_specification though, that will take us back up
15420 the chain and we want to go down. */
15421 attr
= die
->attr (DW_AT_signature
);
15422 if (attr
!= nullptr)
15424 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15426 /* The type's CU may not be the same as CU.
15427 Ensure TYPE is recorded with CU in die_type_hash. */
15428 return set_die_type (die
, type
, cu
);
15431 type
= alloc_type (objfile
);
15432 INIT_CPLUS_SPECIFIC (type
);
15434 name
= dwarf2_name (die
, cu
);
15437 if (cu
->language
== language_cplus
15438 || cu
->language
== language_d
15439 || cu
->language
== language_rust
)
15441 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15443 /* dwarf2_full_name might have already finished building the DIE's
15444 type. If so, there is no need to continue. */
15445 if (get_die_type (die
, cu
) != NULL
)
15446 return get_die_type (die
, cu
);
15448 type
->set_name (full_name
);
15452 /* The name is already allocated along with this objfile, so
15453 we don't need to duplicate it for the type. */
15454 type
->set_name (name
);
15458 if (die
->tag
== DW_TAG_structure_type
)
15460 type
->set_code (TYPE_CODE_STRUCT
);
15462 else if (die
->tag
== DW_TAG_union_type
)
15464 type
->set_code (TYPE_CODE_UNION
);
15468 type
->set_code (TYPE_CODE_STRUCT
);
15471 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15472 TYPE_DECLARED_CLASS (type
) = 1;
15474 /* Store the calling convention in the type if it's available in
15475 the die. Otherwise the calling convention remains set to
15476 the default value DW_CC_normal. */
15477 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
15478 if (attr
!= nullptr
15479 && is_valid_DW_AT_calling_convention_for_type (DW_UNSND (attr
)))
15481 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15482 TYPE_CPLUS_CALLING_CONVENTION (type
)
15483 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
15486 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15487 if (attr
!= nullptr)
15489 if (attr
->form_is_constant ())
15490 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15493 struct dynamic_prop prop
;
15494 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
,
15495 cu
->per_cu
->addr_type ()))
15496 type
->add_dyn_prop (DYN_PROP_BYTE_SIZE
, prop
);
15497 TYPE_LENGTH (type
) = 0;
15502 TYPE_LENGTH (type
) = 0;
15505 maybe_set_alignment (cu
, die
, type
);
15507 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15509 /* ICC<14 does not output the required DW_AT_declaration on
15510 incomplete types, but gives them a size of zero. */
15511 TYPE_STUB (type
) = 1;
15514 TYPE_STUB_SUPPORTED (type
) = 1;
15516 if (die_is_declaration (die
, cu
))
15517 TYPE_STUB (type
) = 1;
15518 else if (attr
== NULL
&& die
->child
== NULL
15519 && producer_is_realview (cu
->producer
))
15520 /* RealView does not output the required DW_AT_declaration
15521 on incomplete types. */
15522 TYPE_STUB (type
) = 1;
15524 /* We need to add the type field to the die immediately so we don't
15525 infinitely recurse when dealing with pointers to the structure
15526 type within the structure itself. */
15527 set_die_type (die
, type
, cu
);
15529 /* set_die_type should be already done. */
15530 set_descriptive_type (type
, die
, cu
);
15535 static void handle_struct_member_die
15536 (struct die_info
*child_die
,
15538 struct field_info
*fi
,
15539 std::vector
<struct symbol
*> *template_args
,
15540 struct dwarf2_cu
*cu
);
15542 /* A helper for handle_struct_member_die that handles
15543 DW_TAG_variant_part. */
15546 handle_variant_part (struct die_info
*die
, struct type
*type
,
15547 struct field_info
*fi
,
15548 std::vector
<struct symbol
*> *template_args
,
15549 struct dwarf2_cu
*cu
)
15551 variant_part_builder
*new_part
;
15552 if (fi
->current_variant_part
== nullptr)
15554 fi
->variant_parts
.emplace_back ();
15555 new_part
= &fi
->variant_parts
.back ();
15557 else if (!fi
->current_variant_part
->processing_variant
)
15559 complaint (_("nested DW_TAG_variant_part seen "
15560 "- DIE at %s [in module %s]"),
15561 sect_offset_str (die
->sect_off
),
15562 objfile_name (cu
->per_objfile
->objfile
));
15567 variant_field
¤t
= fi
->current_variant_part
->variants
.back ();
15568 current
.variant_parts
.emplace_back ();
15569 new_part
= ¤t
.variant_parts
.back ();
15572 /* When we recurse, we want callees to add to this new variant
15574 scoped_restore save_current_variant_part
15575 = make_scoped_restore (&fi
->current_variant_part
, new_part
);
15577 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15580 /* It's a univariant form, an extension we support. */
15582 else if (discr
->form_is_ref ())
15584 struct dwarf2_cu
*target_cu
= cu
;
15585 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15587 new_part
->discriminant_offset
= target_die
->sect_off
;
15591 complaint (_("DW_AT_discr does not have DIE reference form"
15592 " - DIE at %s [in module %s]"),
15593 sect_offset_str (die
->sect_off
),
15594 objfile_name (cu
->per_objfile
->objfile
));
15597 for (die_info
*child_die
= die
->child
;
15599 child_die
= child_die
->sibling
)
15600 handle_struct_member_die (child_die
, type
, fi
, template_args
, cu
);
15603 /* A helper for handle_struct_member_die that handles
15607 handle_variant (struct die_info
*die
, struct type
*type
,
15608 struct field_info
*fi
,
15609 std::vector
<struct symbol
*> *template_args
,
15610 struct dwarf2_cu
*cu
)
15612 if (fi
->current_variant_part
== nullptr)
15614 complaint (_("saw DW_TAG_variant outside DW_TAG_variant_part "
15615 "- DIE at %s [in module %s]"),
15616 sect_offset_str (die
->sect_off
),
15617 objfile_name (cu
->per_objfile
->objfile
));
15620 if (fi
->current_variant_part
->processing_variant
)
15622 complaint (_("nested DW_TAG_variant seen "
15623 "- DIE at %s [in module %s]"),
15624 sect_offset_str (die
->sect_off
),
15625 objfile_name (cu
->per_objfile
->objfile
));
15629 scoped_restore save_processing_variant
15630 = make_scoped_restore (&fi
->current_variant_part
->processing_variant
,
15633 fi
->current_variant_part
->variants
.emplace_back ();
15634 variant_field
&variant
= fi
->current_variant_part
->variants
.back ();
15635 variant
.first_field
= fi
->fields
.size ();
15637 /* In a variant we want to get the discriminant and also add a
15638 field for our sole member child. */
15639 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr_value
, cu
);
15640 if (discr
== nullptr)
15642 discr
= dwarf2_attr (die
, DW_AT_discr_list
, cu
);
15643 if (discr
== nullptr || DW_BLOCK (discr
)->size
== 0)
15644 variant
.default_branch
= true;
15646 variant
.discr_list_data
= DW_BLOCK (discr
);
15649 variant
.discriminant_value
= DW_UNSND (discr
);
15651 for (die_info
*variant_child
= die
->child
;
15652 variant_child
!= NULL
;
15653 variant_child
= variant_child
->sibling
)
15654 handle_struct_member_die (variant_child
, type
, fi
, template_args
, cu
);
15656 variant
.last_field
= fi
->fields
.size ();
15659 /* A helper for process_structure_scope that handles a single member
15663 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15664 struct field_info
*fi
,
15665 std::vector
<struct symbol
*> *template_args
,
15666 struct dwarf2_cu
*cu
)
15668 if (child_die
->tag
== DW_TAG_member
15669 || child_die
->tag
== DW_TAG_variable
)
15671 /* NOTE: carlton/2002-11-05: A C++ static data member
15672 should be a DW_TAG_member that is a declaration, but
15673 all versions of G++ as of this writing (so through at
15674 least 3.2.1) incorrectly generate DW_TAG_variable
15675 tags for them instead. */
15676 dwarf2_add_field (fi
, child_die
, cu
);
15678 else if (child_die
->tag
== DW_TAG_subprogram
)
15680 /* Rust doesn't have member functions in the C++ sense.
15681 However, it does emit ordinary functions as children
15682 of a struct DIE. */
15683 if (cu
->language
== language_rust
)
15684 read_func_scope (child_die
, cu
);
15687 /* C++ member function. */
15688 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15691 else if (child_die
->tag
== DW_TAG_inheritance
)
15693 /* C++ base class field. */
15694 dwarf2_add_field (fi
, child_die
, cu
);
15696 else if (type_can_define_types (child_die
))
15697 dwarf2_add_type_defn (fi
, child_die
, cu
);
15698 else if (child_die
->tag
== DW_TAG_template_type_param
15699 || child_die
->tag
== DW_TAG_template_value_param
)
15701 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15704 template_args
->push_back (arg
);
15706 else if (child_die
->tag
== DW_TAG_variant_part
)
15707 handle_variant_part (child_die
, type
, fi
, template_args
, cu
);
15708 else if (child_die
->tag
== DW_TAG_variant
)
15709 handle_variant (child_die
, type
, fi
, template_args
, cu
);
15712 /* Finish creating a structure or union type, including filling in
15713 its members and creating a symbol for it. */
15716 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15718 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
15719 struct die_info
*child_die
;
15722 type
= get_die_type (die
, cu
);
15724 type
= read_structure_type (die
, cu
);
15726 bool has_template_parameters
= false;
15727 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15729 struct field_info fi
;
15730 std::vector
<struct symbol
*> template_args
;
15732 child_die
= die
->child
;
15734 while (child_die
&& child_die
->tag
)
15736 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15737 child_die
= child_die
->sibling
;
15740 /* Attach template arguments to type. */
15741 if (!template_args
.empty ())
15743 has_template_parameters
= true;
15744 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15745 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15746 TYPE_TEMPLATE_ARGUMENTS (type
)
15747 = XOBNEWVEC (&objfile
->objfile_obstack
,
15749 TYPE_N_TEMPLATE_ARGUMENTS (type
));
15750 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
15751 template_args
.data (),
15752 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
15753 * sizeof (struct symbol
*)));
15756 /* Attach fields and member functions to the type. */
15757 if (fi
.nfields () > 0)
15758 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
15759 if (!fi
.fnfieldlists
.empty ())
15761 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
15763 /* Get the type which refers to the base class (possibly this
15764 class itself) which contains the vtable pointer for the current
15765 class from the DW_AT_containing_type attribute. This use of
15766 DW_AT_containing_type is a GNU extension. */
15768 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15770 struct type
*t
= die_containing_type (die
, cu
);
15772 set_type_vptr_basetype (type
, t
);
15777 /* Our own class provides vtbl ptr. */
15778 for (i
= t
->num_fields () - 1;
15779 i
>= TYPE_N_BASECLASSES (t
);
15782 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
15784 if (is_vtable_name (fieldname
, cu
))
15786 set_type_vptr_fieldno (type
, i
);
15791 /* Complain if virtual function table field not found. */
15792 if (i
< TYPE_N_BASECLASSES (t
))
15793 complaint (_("virtual function table pointer "
15794 "not found when defining class '%s'"),
15795 type
->name () ? type
->name () : "");
15799 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
15802 else if (cu
->producer
15803 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
15805 /* The IBM XLC compiler does not provide direct indication
15806 of the containing type, but the vtable pointer is
15807 always named __vfp. */
15811 for (i
= type
->num_fields () - 1;
15812 i
>= TYPE_N_BASECLASSES (type
);
15815 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
15817 set_type_vptr_fieldno (type
, i
);
15818 set_type_vptr_basetype (type
, type
);
15825 /* Copy fi.typedef_field_list linked list elements content into the
15826 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
15827 if (!fi
.typedef_field_list
.empty ())
15829 int count
= fi
.typedef_field_list
.size ();
15831 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15832 TYPE_TYPEDEF_FIELD_ARRAY (type
)
15833 = ((struct decl_field
*)
15835 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
15836 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
15838 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
15839 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
15842 /* Copy fi.nested_types_list linked list elements content into the
15843 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
15844 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
15846 int count
= fi
.nested_types_list
.size ();
15848 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15849 TYPE_NESTED_TYPES_ARRAY (type
)
15850 = ((struct decl_field
*)
15851 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
15852 TYPE_NESTED_TYPES_COUNT (type
) = count
;
15854 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
15855 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
15859 quirk_gcc_member_function_pointer (type
, objfile
);
15860 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
15861 cu
->rust_unions
.push_back (type
);
15863 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
15864 snapshots) has been known to create a die giving a declaration
15865 for a class that has, as a child, a die giving a definition for a
15866 nested class. So we have to process our children even if the
15867 current die is a declaration. Normally, of course, a declaration
15868 won't have any children at all. */
15870 child_die
= die
->child
;
15872 while (child_die
!= NULL
&& child_die
->tag
)
15874 if (child_die
->tag
== DW_TAG_member
15875 || child_die
->tag
== DW_TAG_variable
15876 || child_die
->tag
== DW_TAG_inheritance
15877 || child_die
->tag
== DW_TAG_template_value_param
15878 || child_die
->tag
== DW_TAG_template_type_param
)
15883 process_die (child_die
, cu
);
15885 child_die
= child_die
->sibling
;
15888 /* Do not consider external references. According to the DWARF standard,
15889 these DIEs are identified by the fact that they have no byte_size
15890 attribute, and a declaration attribute. */
15891 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
15892 || !die_is_declaration (die
, cu
)
15893 || dwarf2_attr (die
, DW_AT_signature
, cu
) != NULL
)
15895 struct symbol
*sym
= new_symbol (die
, type
, cu
);
15897 if (has_template_parameters
)
15899 struct symtab
*symtab
;
15900 if (sym
!= nullptr)
15901 symtab
= symbol_symtab (sym
);
15902 else if (cu
->line_header
!= nullptr)
15904 /* Any related symtab will do. */
15906 = cu
->line_header
->file_names ()[0].symtab
;
15911 complaint (_("could not find suitable "
15912 "symtab for template parameter"
15913 " - DIE at %s [in module %s]"),
15914 sect_offset_str (die
->sect_off
),
15915 objfile_name (objfile
));
15918 if (symtab
!= nullptr)
15920 /* Make sure that the symtab is set on the new symbols.
15921 Even though they don't appear in this symtab directly,
15922 other parts of gdb assume that symbols do, and this is
15923 reasonably true. */
15924 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
15925 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
), symtab
);
15931 /* Assuming DIE is an enumeration type, and TYPE is its associated
15932 type, update TYPE using some information only available in DIE's
15933 children. In particular, the fields are computed. */
15936 update_enumeration_type_from_children (struct die_info
*die
,
15938 struct dwarf2_cu
*cu
)
15940 struct die_info
*child_die
;
15941 int unsigned_enum
= 1;
15944 auto_obstack obstack
;
15945 std::vector
<struct field
> fields
;
15947 for (child_die
= die
->child
;
15948 child_die
!= NULL
&& child_die
->tag
;
15949 child_die
= child_die
->sibling
)
15951 struct attribute
*attr
;
15953 const gdb_byte
*bytes
;
15954 struct dwarf2_locexpr_baton
*baton
;
15957 if (child_die
->tag
!= DW_TAG_enumerator
)
15960 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
15964 name
= dwarf2_name (child_die
, cu
);
15966 name
= "<anonymous enumerator>";
15968 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
15969 &value
, &bytes
, &baton
);
15977 if (count_one_bits_ll (value
) >= 2)
15981 fields
.emplace_back ();
15982 struct field
&field
= fields
.back ();
15983 FIELD_NAME (field
) = dwarf2_physname (name
, child_die
, cu
);
15984 SET_FIELD_ENUMVAL (field
, value
);
15987 if (!fields
.empty ())
15989 type
->set_num_fields (fields
.size ());
15992 TYPE_ALLOC (type
, sizeof (struct field
) * fields
.size ()));
15993 memcpy (type
->fields (), fields
.data (),
15994 sizeof (struct field
) * fields
.size ());
15998 TYPE_UNSIGNED (type
) = 1;
16000 TYPE_FLAG_ENUM (type
) = 1;
16003 /* Given a DW_AT_enumeration_type die, set its type. We do not
16004 complete the type's fields yet, or create any symbols. */
16006 static struct type
*
16007 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16009 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16011 struct attribute
*attr
;
16014 /* If the definition of this type lives in .debug_types, read that type.
16015 Don't follow DW_AT_specification though, that will take us back up
16016 the chain and we want to go down. */
16017 attr
= die
->attr (DW_AT_signature
);
16018 if (attr
!= nullptr)
16020 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16022 /* The type's CU may not be the same as CU.
16023 Ensure TYPE is recorded with CU in die_type_hash. */
16024 return set_die_type (die
, type
, cu
);
16027 type
= alloc_type (objfile
);
16029 type
->set_code (TYPE_CODE_ENUM
);
16030 name
= dwarf2_full_name (NULL
, die
, cu
);
16032 type
->set_name (name
);
16034 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16037 struct type
*underlying_type
= die_type (die
, cu
);
16039 TYPE_TARGET_TYPE (type
) = underlying_type
;
16042 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16043 if (attr
!= nullptr)
16045 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16049 TYPE_LENGTH (type
) = 0;
16052 maybe_set_alignment (cu
, die
, type
);
16054 /* The enumeration DIE can be incomplete. In Ada, any type can be
16055 declared as private in the package spec, and then defined only
16056 inside the package body. Such types are known as Taft Amendment
16057 Types. When another package uses such a type, an incomplete DIE
16058 may be generated by the compiler. */
16059 if (die_is_declaration (die
, cu
))
16060 TYPE_STUB (type
) = 1;
16062 /* If this type has an underlying type that is not a stub, then we
16063 may use its attributes. We always use the "unsigned" attribute
16064 in this situation, because ordinarily we guess whether the type
16065 is unsigned -- but the guess can be wrong and the underlying type
16066 can tell us the reality. However, we defer to a local size
16067 attribute if one exists, because this lets the compiler override
16068 the underlying type if needed. */
16069 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16071 struct type
*underlying_type
= TYPE_TARGET_TYPE (type
);
16072 underlying_type
= check_typedef (underlying_type
);
16073 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (underlying_type
);
16074 if (TYPE_LENGTH (type
) == 0)
16075 TYPE_LENGTH (type
) = TYPE_LENGTH (underlying_type
);
16076 if (TYPE_RAW_ALIGN (type
) == 0
16077 && TYPE_RAW_ALIGN (underlying_type
) != 0)
16078 set_type_align (type
, TYPE_RAW_ALIGN (underlying_type
));
16081 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16083 set_die_type (die
, type
, cu
);
16085 /* Finish the creation of this type by using the enum's children.
16086 Note that, as usual, this must come after set_die_type to avoid
16087 infinite recursion when trying to compute the names of the
16089 update_enumeration_type_from_children (die
, type
, cu
);
16094 /* Given a pointer to a die which begins an enumeration, process all
16095 the dies that define the members of the enumeration, and create the
16096 symbol for the enumeration type.
16098 NOTE: We reverse the order of the element list. */
16101 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16103 struct type
*this_type
;
16105 this_type
= get_die_type (die
, cu
);
16106 if (this_type
== NULL
)
16107 this_type
= read_enumeration_type (die
, cu
);
16109 if (die
->child
!= NULL
)
16111 struct die_info
*child_die
;
16114 child_die
= die
->child
;
16115 while (child_die
&& child_die
->tag
)
16117 if (child_die
->tag
!= DW_TAG_enumerator
)
16119 process_die (child_die
, cu
);
16123 name
= dwarf2_name (child_die
, cu
);
16125 new_symbol (child_die
, this_type
, cu
);
16128 child_die
= child_die
->sibling
;
16132 /* If we are reading an enum from a .debug_types unit, and the enum
16133 is a declaration, and the enum is not the signatured type in the
16134 unit, then we do not want to add a symbol for it. Adding a
16135 symbol would in some cases obscure the true definition of the
16136 enum, giving users an incomplete type when the definition is
16137 actually available. Note that we do not want to do this for all
16138 enums which are just declarations, because C++0x allows forward
16139 enum declarations. */
16140 if (cu
->per_cu
->is_debug_types
16141 && die_is_declaration (die
, cu
))
16143 struct signatured_type
*sig_type
;
16145 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16146 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16147 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16151 new_symbol (die
, this_type
, cu
);
16154 /* Extract all information from a DW_TAG_array_type DIE and put it in
16155 the DIE's type field. For now, this only handles one dimensional
16158 static struct type
*
16159 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16161 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16162 struct die_info
*child_die
;
16164 struct type
*element_type
, *range_type
, *index_type
;
16165 struct attribute
*attr
;
16167 struct dynamic_prop
*byte_stride_prop
= NULL
;
16168 unsigned int bit_stride
= 0;
16170 element_type
= die_type (die
, cu
);
16172 /* The die_type call above may have already set the type for this DIE. */
16173 type
= get_die_type (die
, cu
);
16177 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16181 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
16184 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16185 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
,
16189 complaint (_("unable to read array DW_AT_byte_stride "
16190 " - DIE at %s [in module %s]"),
16191 sect_offset_str (die
->sect_off
),
16192 objfile_name (cu
->per_objfile
->objfile
));
16193 /* Ignore this attribute. We will likely not be able to print
16194 arrays of this type correctly, but there is little we can do
16195 to help if we cannot read the attribute's value. */
16196 byte_stride_prop
= NULL
;
16200 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16202 bit_stride
= DW_UNSND (attr
);
16204 /* Irix 6.2 native cc creates array types without children for
16205 arrays with unspecified length. */
16206 if (die
->child
== NULL
)
16208 index_type
= objfile_type (objfile
)->builtin_int
;
16209 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16210 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16211 byte_stride_prop
, bit_stride
);
16212 return set_die_type (die
, type
, cu
);
16215 std::vector
<struct type
*> range_types
;
16216 child_die
= die
->child
;
16217 while (child_die
&& child_die
->tag
)
16219 if (child_die
->tag
== DW_TAG_subrange_type
)
16221 struct type
*child_type
= read_type_die (child_die
, cu
);
16223 if (child_type
!= NULL
)
16225 /* The range type was succesfully read. Save it for the
16226 array type creation. */
16227 range_types
.push_back (child_type
);
16230 child_die
= child_die
->sibling
;
16233 /* Dwarf2 dimensions are output from left to right, create the
16234 necessary array types in backwards order. */
16236 type
= element_type
;
16238 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16242 while (i
< range_types
.size ())
16243 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16244 byte_stride_prop
, bit_stride
);
16248 size_t ndim
= range_types
.size ();
16250 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16251 byte_stride_prop
, bit_stride
);
16254 /* Understand Dwarf2 support for vector types (like they occur on
16255 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16256 array type. This is not part of the Dwarf2/3 standard yet, but a
16257 custom vendor extension. The main difference between a regular
16258 array and the vector variant is that vectors are passed by value
16260 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16261 if (attr
!= nullptr)
16262 make_vector_type (type
);
16264 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16265 implementation may choose to implement triple vectors using this
16267 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16268 if (attr
!= nullptr)
16270 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16271 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16273 complaint (_("DW_AT_byte_size for array type smaller "
16274 "than the total size of elements"));
16277 name
= dwarf2_name (die
, cu
);
16279 type
->set_name (name
);
16281 maybe_set_alignment (cu
, die
, type
);
16283 /* Install the type in the die. */
16284 set_die_type (die
, type
, cu
);
16286 /* set_die_type should be already done. */
16287 set_descriptive_type (type
, die
, cu
);
16292 static enum dwarf_array_dim_ordering
16293 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16295 struct attribute
*attr
;
16297 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16299 if (attr
!= nullptr)
16300 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16302 /* GNU F77 is a special case, as at 08/2004 array type info is the
16303 opposite order to the dwarf2 specification, but data is still
16304 laid out as per normal fortran.
16306 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16307 version checking. */
16309 if (cu
->language
== language_fortran
16310 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16312 return DW_ORD_row_major
;
16315 switch (cu
->language_defn
->la_array_ordering
)
16317 case array_column_major
:
16318 return DW_ORD_col_major
;
16319 case array_row_major
:
16321 return DW_ORD_row_major
;
16325 /* Extract all information from a DW_TAG_set_type DIE and put it in
16326 the DIE's type field. */
16328 static struct type
*
16329 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16331 struct type
*domain_type
, *set_type
;
16332 struct attribute
*attr
;
16334 domain_type
= die_type (die
, cu
);
16336 /* The die_type call above may have already set the type for this DIE. */
16337 set_type
= get_die_type (die
, cu
);
16341 set_type
= create_set_type (NULL
, domain_type
);
16343 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16344 if (attr
!= nullptr)
16345 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16347 maybe_set_alignment (cu
, die
, set_type
);
16349 return set_die_type (die
, set_type
, cu
);
16352 /* A helper for read_common_block that creates a locexpr baton.
16353 SYM is the symbol which we are marking as computed.
16354 COMMON_DIE is the DIE for the common block.
16355 COMMON_LOC is the location expression attribute for the common
16357 MEMBER_LOC is the location expression attribute for the particular
16358 member of the common block that we are processing.
16359 CU is the CU from which the above come. */
16362 mark_common_block_symbol_computed (struct symbol
*sym
,
16363 struct die_info
*common_die
,
16364 struct attribute
*common_loc
,
16365 struct attribute
*member_loc
,
16366 struct dwarf2_cu
*cu
)
16368 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
16369 struct objfile
*objfile
= per_objfile
->objfile
;
16370 struct dwarf2_locexpr_baton
*baton
;
16372 unsigned int cu_off
;
16373 enum bfd_endian byte_order
= gdbarch_byte_order (objfile
->arch ());
16374 LONGEST offset
= 0;
16376 gdb_assert (common_loc
&& member_loc
);
16377 gdb_assert (common_loc
->form_is_block ());
16378 gdb_assert (member_loc
->form_is_block ()
16379 || member_loc
->form_is_constant ());
16381 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16382 baton
->per_objfile
= per_objfile
;
16383 baton
->per_cu
= cu
->per_cu
;
16384 gdb_assert (baton
->per_cu
);
16386 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16388 if (member_loc
->form_is_constant ())
16390 offset
= member_loc
->constant_value (0);
16391 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16394 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16396 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16399 *ptr
++ = DW_OP_call4
;
16400 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16401 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16404 if (member_loc
->form_is_constant ())
16406 *ptr
++ = DW_OP_addr
;
16407 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16408 ptr
+= cu
->header
.addr_size
;
16412 /* We have to copy the data here, because DW_OP_call4 will only
16413 use a DW_AT_location attribute. */
16414 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16415 ptr
+= DW_BLOCK (member_loc
)->size
;
16418 *ptr
++ = DW_OP_plus
;
16419 gdb_assert (ptr
- baton
->data
== baton
->size
);
16421 SYMBOL_LOCATION_BATON (sym
) = baton
;
16422 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16425 /* Create appropriate locally-scoped variables for all the
16426 DW_TAG_common_block entries. Also create a struct common_block
16427 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16428 is used to separate the common blocks name namespace from regular
16432 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16434 struct attribute
*attr
;
16436 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16437 if (attr
!= nullptr)
16439 /* Support the .debug_loc offsets. */
16440 if (attr
->form_is_block ())
16444 else if (attr
->form_is_section_offset ())
16446 dwarf2_complex_location_expr_complaint ();
16451 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16452 "common block member");
16457 if (die
->child
!= NULL
)
16459 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16460 struct die_info
*child_die
;
16461 size_t n_entries
= 0, size
;
16462 struct common_block
*common_block
;
16463 struct symbol
*sym
;
16465 for (child_die
= die
->child
;
16466 child_die
&& child_die
->tag
;
16467 child_die
= child_die
->sibling
)
16470 size
= (sizeof (struct common_block
)
16471 + (n_entries
- 1) * sizeof (struct symbol
*));
16473 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16475 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16476 common_block
->n_entries
= 0;
16478 for (child_die
= die
->child
;
16479 child_die
&& child_die
->tag
;
16480 child_die
= child_die
->sibling
)
16482 /* Create the symbol in the DW_TAG_common_block block in the current
16484 sym
= new_symbol (child_die
, NULL
, cu
);
16487 struct attribute
*member_loc
;
16489 common_block
->contents
[common_block
->n_entries
++] = sym
;
16491 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16495 /* GDB has handled this for a long time, but it is
16496 not specified by DWARF. It seems to have been
16497 emitted by gfortran at least as recently as:
16498 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16499 complaint (_("Variable in common block has "
16500 "DW_AT_data_member_location "
16501 "- DIE at %s [in module %s]"),
16502 sect_offset_str (child_die
->sect_off
),
16503 objfile_name (objfile
));
16505 if (member_loc
->form_is_section_offset ())
16506 dwarf2_complex_location_expr_complaint ();
16507 else if (member_loc
->form_is_constant ()
16508 || member_loc
->form_is_block ())
16510 if (attr
!= nullptr)
16511 mark_common_block_symbol_computed (sym
, die
, attr
,
16515 dwarf2_complex_location_expr_complaint ();
16520 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16521 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16525 /* Create a type for a C++ namespace. */
16527 static struct type
*
16528 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16530 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16531 const char *previous_prefix
, *name
;
16535 /* For extensions, reuse the type of the original namespace. */
16536 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16538 struct die_info
*ext_die
;
16539 struct dwarf2_cu
*ext_cu
= cu
;
16541 ext_die
= dwarf2_extension (die
, &ext_cu
);
16542 type
= read_type_die (ext_die
, ext_cu
);
16544 /* EXT_CU may not be the same as CU.
16545 Ensure TYPE is recorded with CU in die_type_hash. */
16546 return set_die_type (die
, type
, cu
);
16549 name
= namespace_name (die
, &is_anonymous
, cu
);
16551 /* Now build the name of the current namespace. */
16553 previous_prefix
= determine_prefix (die
, cu
);
16554 if (previous_prefix
[0] != '\0')
16555 name
= typename_concat (&objfile
->objfile_obstack
,
16556 previous_prefix
, name
, 0, cu
);
16558 /* Create the type. */
16559 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16561 return set_die_type (die
, type
, cu
);
16564 /* Read a namespace scope. */
16567 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16569 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16572 /* Add a symbol associated to this if we haven't seen the namespace
16573 before. Also, add a using directive if it's an anonymous
16576 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16580 type
= read_type_die (die
, cu
);
16581 new_symbol (die
, type
, cu
);
16583 namespace_name (die
, &is_anonymous
, cu
);
16586 const char *previous_prefix
= determine_prefix (die
, cu
);
16588 std::vector
<const char *> excludes
;
16589 add_using_directive (using_directives (cu
),
16590 previous_prefix
, type
->name (), NULL
,
16591 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16595 if (die
->child
!= NULL
)
16597 struct die_info
*child_die
= die
->child
;
16599 while (child_die
&& child_die
->tag
)
16601 process_die (child_die
, cu
);
16602 child_die
= child_die
->sibling
;
16607 /* Read a Fortran module as type. This DIE can be only a declaration used for
16608 imported module. Still we need that type as local Fortran "use ... only"
16609 declaration imports depend on the created type in determine_prefix. */
16611 static struct type
*
16612 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16614 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16615 const char *module_name
;
16618 module_name
= dwarf2_name (die
, cu
);
16619 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16621 return set_die_type (die
, type
, cu
);
16624 /* Read a Fortran module. */
16627 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16629 struct die_info
*child_die
= die
->child
;
16632 type
= read_type_die (die
, cu
);
16633 new_symbol (die
, type
, cu
);
16635 while (child_die
&& child_die
->tag
)
16637 process_die (child_die
, cu
);
16638 child_die
= child_die
->sibling
;
16642 /* Return the name of the namespace represented by DIE. Set
16643 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16646 static const char *
16647 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16649 struct die_info
*current_die
;
16650 const char *name
= NULL
;
16652 /* Loop through the extensions until we find a name. */
16654 for (current_die
= die
;
16655 current_die
!= NULL
;
16656 current_die
= dwarf2_extension (die
, &cu
))
16658 /* We don't use dwarf2_name here so that we can detect the absence
16659 of a name -> anonymous namespace. */
16660 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16666 /* Is it an anonymous namespace? */
16668 *is_anonymous
= (name
== NULL
);
16670 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16675 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16676 the user defined type vector. */
16678 static struct type
*
16679 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16681 struct gdbarch
*gdbarch
= cu
->per_objfile
->objfile
->arch ();
16682 struct comp_unit_head
*cu_header
= &cu
->header
;
16684 struct attribute
*attr_byte_size
;
16685 struct attribute
*attr_address_class
;
16686 int byte_size
, addr_class
;
16687 struct type
*target_type
;
16689 target_type
= die_type (die
, cu
);
16691 /* The die_type call above may have already set the type for this DIE. */
16692 type
= get_die_type (die
, cu
);
16696 type
= lookup_pointer_type (target_type
);
16698 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16699 if (attr_byte_size
)
16700 byte_size
= DW_UNSND (attr_byte_size
);
16702 byte_size
= cu_header
->addr_size
;
16704 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16705 if (attr_address_class
)
16706 addr_class
= DW_UNSND (attr_address_class
);
16708 addr_class
= DW_ADDR_none
;
16710 ULONGEST alignment
= get_alignment (cu
, die
);
16712 /* If the pointer size, alignment, or address class is different
16713 than the default, create a type variant marked as such and set
16714 the length accordingly. */
16715 if (TYPE_LENGTH (type
) != byte_size
16716 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
16717 && alignment
!= TYPE_RAW_ALIGN (type
))
16718 || addr_class
!= DW_ADDR_none
)
16720 if (gdbarch_address_class_type_flags_p (gdbarch
))
16724 type_flags
= gdbarch_address_class_type_flags
16725 (gdbarch
, byte_size
, addr_class
);
16726 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16728 type
= make_type_with_address_space (type
, type_flags
);
16730 else if (TYPE_LENGTH (type
) != byte_size
)
16732 complaint (_("invalid pointer size %d"), byte_size
);
16734 else if (TYPE_RAW_ALIGN (type
) != alignment
)
16736 complaint (_("Invalid DW_AT_alignment"
16737 " - DIE at %s [in module %s]"),
16738 sect_offset_str (die
->sect_off
),
16739 objfile_name (cu
->per_objfile
->objfile
));
16743 /* Should we also complain about unhandled address classes? */
16747 TYPE_LENGTH (type
) = byte_size
;
16748 set_type_align (type
, alignment
);
16749 return set_die_type (die
, type
, cu
);
16752 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16753 the user defined type vector. */
16755 static struct type
*
16756 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16759 struct type
*to_type
;
16760 struct type
*domain
;
16762 to_type
= die_type (die
, cu
);
16763 domain
= die_containing_type (die
, cu
);
16765 /* The calls above may have already set the type for this DIE. */
16766 type
= get_die_type (die
, cu
);
16770 if (check_typedef (to_type
)->code () == TYPE_CODE_METHOD
)
16771 type
= lookup_methodptr_type (to_type
);
16772 else if (check_typedef (to_type
)->code () == TYPE_CODE_FUNC
)
16774 struct type
*new_type
= alloc_type (cu
->per_objfile
->objfile
);
16776 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
16777 to_type
->fields (), to_type
->num_fields (),
16778 TYPE_VARARGS (to_type
));
16779 type
= lookup_methodptr_type (new_type
);
16782 type
= lookup_memberptr_type (to_type
, domain
);
16784 return set_die_type (die
, type
, cu
);
16787 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
16788 the user defined type vector. */
16790 static struct type
*
16791 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16792 enum type_code refcode
)
16794 struct comp_unit_head
*cu_header
= &cu
->header
;
16795 struct type
*type
, *target_type
;
16796 struct attribute
*attr
;
16798 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
16800 target_type
= die_type (die
, cu
);
16802 /* The die_type call above may have already set the type for this DIE. */
16803 type
= get_die_type (die
, cu
);
16807 type
= lookup_reference_type (target_type
, refcode
);
16808 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16809 if (attr
!= nullptr)
16811 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16815 TYPE_LENGTH (type
) = cu_header
->addr_size
;
16817 maybe_set_alignment (cu
, die
, type
);
16818 return set_die_type (die
, type
, cu
);
16821 /* Add the given cv-qualifiers to the element type of the array. GCC
16822 outputs DWARF type qualifiers that apply to an array, not the
16823 element type. But GDB relies on the array element type to carry
16824 the cv-qualifiers. This mimics section 6.7.3 of the C99
16827 static struct type
*
16828 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16829 struct type
*base_type
, int cnst
, int voltl
)
16831 struct type
*el_type
, *inner_array
;
16833 base_type
= copy_type (base_type
);
16834 inner_array
= base_type
;
16836 while (TYPE_TARGET_TYPE (inner_array
)->code () == TYPE_CODE_ARRAY
)
16838 TYPE_TARGET_TYPE (inner_array
) =
16839 copy_type (TYPE_TARGET_TYPE (inner_array
));
16840 inner_array
= TYPE_TARGET_TYPE (inner_array
);
16843 el_type
= TYPE_TARGET_TYPE (inner_array
);
16844 cnst
|= TYPE_CONST (el_type
);
16845 voltl
|= TYPE_VOLATILE (el_type
);
16846 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
16848 return set_die_type (die
, base_type
, cu
);
16851 static struct type
*
16852 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16854 struct type
*base_type
, *cv_type
;
16856 base_type
= die_type (die
, cu
);
16858 /* The die_type call above may have already set the type for this DIE. */
16859 cv_type
= get_die_type (die
, cu
);
16863 /* In case the const qualifier is applied to an array type, the element type
16864 is so qualified, not the array type (section 6.7.3 of C99). */
16865 if (base_type
->code () == TYPE_CODE_ARRAY
)
16866 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
16868 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
16869 return set_die_type (die
, cv_type
, cu
);
16872 static struct type
*
16873 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16875 struct type
*base_type
, *cv_type
;
16877 base_type
= die_type (die
, cu
);
16879 /* The die_type call above may have already set the type for this DIE. */
16880 cv_type
= get_die_type (die
, cu
);
16884 /* In case the volatile qualifier is applied to an array type, the
16885 element type is so qualified, not the array type (section 6.7.3
16887 if (base_type
->code () == TYPE_CODE_ARRAY
)
16888 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
16890 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
16891 return set_die_type (die
, cv_type
, cu
);
16894 /* Handle DW_TAG_restrict_type. */
16896 static struct type
*
16897 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16899 struct type
*base_type
, *cv_type
;
16901 base_type
= die_type (die
, cu
);
16903 /* The die_type call above may have already set the type for this DIE. */
16904 cv_type
= get_die_type (die
, cu
);
16908 cv_type
= make_restrict_type (base_type
);
16909 return set_die_type (die
, cv_type
, cu
);
16912 /* Handle DW_TAG_atomic_type. */
16914 static struct type
*
16915 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16917 struct type
*base_type
, *cv_type
;
16919 base_type
= die_type (die
, cu
);
16921 /* The die_type call above may have already set the type for this DIE. */
16922 cv_type
= get_die_type (die
, cu
);
16926 cv_type
= make_atomic_type (base_type
);
16927 return set_die_type (die
, cv_type
, cu
);
16930 /* Extract all information from a DW_TAG_string_type DIE and add to
16931 the user defined type vector. It isn't really a user defined type,
16932 but it behaves like one, with other DIE's using an AT_user_def_type
16933 attribute to reference it. */
16935 static struct type
*
16936 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16938 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16939 struct gdbarch
*gdbarch
= objfile
->arch ();
16940 struct type
*type
, *range_type
, *index_type
, *char_type
;
16941 struct attribute
*attr
;
16942 struct dynamic_prop prop
;
16943 bool length_is_constant
= true;
16946 /* There are a couple of places where bit sizes might be made use of
16947 when parsing a DW_TAG_string_type, however, no producer that we know
16948 of make use of these. Handling bit sizes that are a multiple of the
16949 byte size is easy enough, but what about other bit sizes? Lets deal
16950 with that problem when we have to. Warn about these attributes being
16951 unsupported, then parse the type and ignore them like we always
16953 if (dwarf2_attr (die
, DW_AT_bit_size
, cu
) != nullptr
16954 || dwarf2_attr (die
, DW_AT_string_length_bit_size
, cu
) != nullptr)
16956 static bool warning_printed
= false;
16957 if (!warning_printed
)
16959 warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not "
16960 "currently supported on DW_TAG_string_type."));
16961 warning_printed
= true;
16965 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
16966 if (attr
!= nullptr && !attr
->form_is_constant ())
16968 /* The string length describes the location at which the length of
16969 the string can be found. The size of the length field can be
16970 specified with one of the attributes below. */
16971 struct type
*prop_type
;
16972 struct attribute
*len
16973 = dwarf2_attr (die
, DW_AT_string_length_byte_size
, cu
);
16974 if (len
== nullptr)
16975 len
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16976 if (len
!= nullptr && len
->form_is_constant ())
16978 /* Pass 0 as the default as we know this attribute is constant
16979 and the default value will not be returned. */
16980 LONGEST sz
= len
->constant_value (0);
16981 prop_type
= cu
->per_cu
->int_type (sz
, true);
16985 /* If the size is not specified then we assume it is the size of
16986 an address on this target. */
16987 prop_type
= cu
->per_cu
->addr_sized_int_type (true);
16990 /* Convert the attribute into a dynamic property. */
16991 if (!attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
16994 length_is_constant
= false;
16996 else if (attr
!= nullptr)
16998 /* This DW_AT_string_length just contains the length with no
16999 indirection. There's no need to create a dynamic property in this
17000 case. Pass 0 for the default value as we know it will not be
17001 returned in this case. */
17002 length
= attr
->constant_value (0);
17004 else if ((attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
)) != nullptr)
17006 /* We don't currently support non-constant byte sizes for strings. */
17007 length
= attr
->constant_value (1);
17011 /* Use 1 as a fallback length if we have nothing else. */
17015 index_type
= objfile_type (objfile
)->builtin_int
;
17016 if (length_is_constant
)
17017 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17020 struct dynamic_prop low_bound
;
17022 low_bound
.kind
= PROP_CONST
;
17023 low_bound
.data
.const_val
= 1;
17024 range_type
= create_range_type (NULL
, index_type
, &low_bound
, &prop
, 0);
17026 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
17027 type
= create_string_type (NULL
, char_type
, range_type
);
17029 return set_die_type (die
, type
, cu
);
17032 /* Assuming that DIE corresponds to a function, returns nonzero
17033 if the function is prototyped. */
17036 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
17038 struct attribute
*attr
;
17040 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
17041 if (attr
&& (DW_UNSND (attr
) != 0))
17044 /* The DWARF standard implies that the DW_AT_prototyped attribute
17045 is only meaningful for C, but the concept also extends to other
17046 languages that allow unprototyped functions (Eg: Objective C).
17047 For all other languages, assume that functions are always
17049 if (cu
->language
!= language_c
17050 && cu
->language
!= language_objc
17051 && cu
->language
!= language_opencl
)
17054 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17055 prototyped and unprototyped functions; default to prototyped,
17056 since that is more common in modern code (and RealView warns
17057 about unprototyped functions). */
17058 if (producer_is_realview (cu
->producer
))
17064 /* Handle DIES due to C code like:
17068 int (*funcp)(int a, long l);
17072 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17074 static struct type
*
17075 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17077 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17078 struct type
*type
; /* Type that this function returns. */
17079 struct type
*ftype
; /* Function that returns above type. */
17080 struct attribute
*attr
;
17082 type
= die_type (die
, cu
);
17084 /* The die_type call above may have already set the type for this DIE. */
17085 ftype
= get_die_type (die
, cu
);
17089 ftype
= lookup_function_type (type
);
17091 if (prototyped_function_p (die
, cu
))
17092 TYPE_PROTOTYPED (ftype
) = 1;
17094 /* Store the calling convention in the type if it's available in
17095 the subroutine die. Otherwise set the calling convention to
17096 the default value DW_CC_normal. */
17097 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17098 if (attr
!= nullptr
17099 && is_valid_DW_AT_calling_convention_for_subroutine (DW_UNSND (attr
)))
17100 TYPE_CALLING_CONVENTION (ftype
)
17101 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
17102 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17103 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17105 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17107 /* Record whether the function returns normally to its caller or not
17108 if the DWARF producer set that information. */
17109 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17110 if (attr
&& (DW_UNSND (attr
) != 0))
17111 TYPE_NO_RETURN (ftype
) = 1;
17113 /* We need to add the subroutine type to the die immediately so
17114 we don't infinitely recurse when dealing with parameters
17115 declared as the same subroutine type. */
17116 set_die_type (die
, ftype
, cu
);
17118 if (die
->child
!= NULL
)
17120 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17121 struct die_info
*child_die
;
17122 int nparams
, iparams
;
17124 /* Count the number of parameters.
17125 FIXME: GDB currently ignores vararg functions, but knows about
17126 vararg member functions. */
17128 child_die
= die
->child
;
17129 while (child_die
&& child_die
->tag
)
17131 if (child_die
->tag
== DW_TAG_formal_parameter
)
17133 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17134 TYPE_VARARGS (ftype
) = 1;
17135 child_die
= child_die
->sibling
;
17138 /* Allocate storage for parameters and fill them in. */
17139 ftype
->set_num_fields (nparams
);
17141 ((struct field
*) TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
)));
17143 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17144 even if we error out during the parameters reading below. */
17145 for (iparams
= 0; iparams
< nparams
; iparams
++)
17146 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17149 child_die
= die
->child
;
17150 while (child_die
&& child_die
->tag
)
17152 if (child_die
->tag
== DW_TAG_formal_parameter
)
17154 struct type
*arg_type
;
17156 /* DWARF version 2 has no clean way to discern C++
17157 static and non-static member functions. G++ helps
17158 GDB by marking the first parameter for non-static
17159 member functions (which is the this pointer) as
17160 artificial. We pass this information to
17161 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17163 DWARF version 3 added DW_AT_object_pointer, which GCC
17164 4.5 does not yet generate. */
17165 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17166 if (attr
!= nullptr)
17167 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17169 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17170 arg_type
= die_type (child_die
, cu
);
17172 /* RealView does not mark THIS as const, which the testsuite
17173 expects. GCC marks THIS as const in method definitions,
17174 but not in the class specifications (GCC PR 43053). */
17175 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17176 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17179 struct dwarf2_cu
*arg_cu
= cu
;
17180 const char *name
= dwarf2_name (child_die
, cu
);
17182 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17183 if (attr
!= nullptr)
17185 /* If the compiler emits this, use it. */
17186 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17189 else if (name
&& strcmp (name
, "this") == 0)
17190 /* Function definitions will have the argument names. */
17192 else if (name
== NULL
&& iparams
== 0)
17193 /* Declarations may not have the names, so like
17194 elsewhere in GDB, assume an artificial first
17195 argument is "this". */
17199 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17203 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17206 child_die
= child_die
->sibling
;
17213 static struct type
*
17214 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17216 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17217 const char *name
= NULL
;
17218 struct type
*this_type
, *target_type
;
17220 name
= dwarf2_full_name (NULL
, die
, cu
);
17221 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17222 TYPE_TARGET_STUB (this_type
) = 1;
17223 set_die_type (die
, this_type
, cu
);
17224 target_type
= die_type (die
, cu
);
17225 if (target_type
!= this_type
)
17226 TYPE_TARGET_TYPE (this_type
) = target_type
;
17229 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17230 spec and cause infinite loops in GDB. */
17231 complaint (_("Self-referential DW_TAG_typedef "
17232 "- DIE at %s [in module %s]"),
17233 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17234 TYPE_TARGET_TYPE (this_type
) = NULL
;
17238 /* Gcc-7 and before supports -feliminate-dwarf2-dups, which generates
17239 anonymous typedefs, which is, strictly speaking, invalid DWARF.
17240 Handle these by just returning the target type, rather than
17241 constructing an anonymous typedef type and trying to handle this
17243 set_die_type (die
, target_type
, cu
);
17244 return target_type
;
17249 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17250 (which may be different from NAME) to the architecture back-end to allow
17251 it to guess the correct format if necessary. */
17253 static struct type
*
17254 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17255 const char *name_hint
, enum bfd_endian byte_order
)
17257 struct gdbarch
*gdbarch
= objfile
->arch ();
17258 const struct floatformat
**format
;
17261 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17263 type
= init_float_type (objfile
, bits
, name
, format
, byte_order
);
17265 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17270 /* Allocate an integer type of size BITS and name NAME. */
17272 static struct type
*
17273 dwarf2_init_integer_type (struct dwarf2_cu
*cu
, struct objfile
*objfile
,
17274 int bits
, int unsigned_p
, const char *name
)
17278 /* Versions of Intel's C Compiler generate an integer type called "void"
17279 instead of using DW_TAG_unspecified_type. This has been seen on
17280 at least versions 14, 17, and 18. */
17281 if (bits
== 0 && producer_is_icc (cu
) && name
!= nullptr
17282 && strcmp (name
, "void") == 0)
17283 type
= objfile_type (objfile
)->builtin_void
;
17285 type
= init_integer_type (objfile
, bits
, unsigned_p
, name
);
17290 /* Initialise and return a floating point type of size BITS suitable for
17291 use as a component of a complex number. The NAME_HINT is passed through
17292 when initialising the floating point type and is the name of the complex
17295 As DWARF doesn't currently provide an explicit name for the components
17296 of a complex number, but it can be helpful to have these components
17297 named, we try to select a suitable name based on the size of the
17299 static struct type
*
17300 dwarf2_init_complex_target_type (struct dwarf2_cu
*cu
,
17301 struct objfile
*objfile
,
17302 int bits
, const char *name_hint
,
17303 enum bfd_endian byte_order
)
17305 gdbarch
*gdbarch
= objfile
->arch ();
17306 struct type
*tt
= nullptr;
17308 /* Try to find a suitable floating point builtin type of size BITS.
17309 We're going to use the name of this type as the name for the complex
17310 target type that we are about to create. */
17311 switch (cu
->language
)
17313 case language_fortran
:
17317 tt
= builtin_f_type (gdbarch
)->builtin_real
;
17320 tt
= builtin_f_type (gdbarch
)->builtin_real_s8
;
17322 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17324 tt
= builtin_f_type (gdbarch
)->builtin_real_s16
;
17332 tt
= builtin_type (gdbarch
)->builtin_float
;
17335 tt
= builtin_type (gdbarch
)->builtin_double
;
17337 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17339 tt
= builtin_type (gdbarch
)->builtin_long_double
;
17345 /* If the type we found doesn't match the size we were looking for, then
17346 pretend we didn't find a type at all, the complex target type we
17347 create will then be nameless. */
17348 if (tt
!= nullptr && TYPE_LENGTH (tt
) * TARGET_CHAR_BIT
!= bits
)
17351 const char *name
= (tt
== nullptr) ? nullptr : tt
->name ();
17352 return dwarf2_init_float_type (objfile
, bits
, name
, name_hint
, byte_order
);
17355 /* Find a representation of a given base type and install
17356 it in the TYPE field of the die. */
17358 static struct type
*
17359 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17361 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17363 struct attribute
*attr
;
17364 int encoding
= 0, bits
= 0;
17368 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17369 if (attr
!= nullptr)
17370 encoding
= DW_UNSND (attr
);
17371 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17372 if (attr
!= nullptr)
17373 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17374 name
= dwarf2_name (die
, cu
);
17376 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
17378 arch
= objfile
->arch ();
17379 enum bfd_endian byte_order
= gdbarch_byte_order (arch
);
17381 attr
= dwarf2_attr (die
, DW_AT_endianity
, cu
);
17384 int endianity
= DW_UNSND (attr
);
17389 byte_order
= BFD_ENDIAN_BIG
;
17391 case DW_END_little
:
17392 byte_order
= BFD_ENDIAN_LITTLE
;
17395 complaint (_("DW_AT_endianity has unrecognized value %d"), endianity
);
17402 case DW_ATE_address
:
17403 /* Turn DW_ATE_address into a void * pointer. */
17404 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17405 type
= init_pointer_type (objfile
, bits
, name
, type
);
17407 case DW_ATE_boolean
:
17408 type
= init_boolean_type (objfile
, bits
, 1, name
);
17410 case DW_ATE_complex_float
:
17411 type
= dwarf2_init_complex_target_type (cu
, objfile
, bits
/ 2, name
,
17413 if (type
->code () == TYPE_CODE_ERROR
)
17415 if (name
== nullptr)
17417 struct obstack
*obstack
17418 = &cu
->per_objfile
->objfile
->objfile_obstack
;
17419 name
= obconcat (obstack
, "_Complex ", type
->name (),
17422 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17425 type
= init_complex_type (name
, type
);
17427 case DW_ATE_decimal_float
:
17428 type
= init_decfloat_type (objfile
, bits
, name
);
17431 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
, byte_order
);
17433 case DW_ATE_signed
:
17434 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17436 case DW_ATE_unsigned
:
17437 if (cu
->language
== language_fortran
17439 && startswith (name
, "character("))
17440 type
= init_character_type (objfile
, bits
, 1, name
);
17442 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17444 case DW_ATE_signed_char
:
17445 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17446 || cu
->language
== language_pascal
17447 || cu
->language
== language_fortran
)
17448 type
= init_character_type (objfile
, bits
, 0, name
);
17450 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17452 case DW_ATE_unsigned_char
:
17453 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17454 || cu
->language
== language_pascal
17455 || cu
->language
== language_fortran
17456 || cu
->language
== language_rust
)
17457 type
= init_character_type (objfile
, bits
, 1, name
);
17459 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17464 type
= builtin_type (arch
)->builtin_char16
;
17465 else if (bits
== 32)
17466 type
= builtin_type (arch
)->builtin_char32
;
17469 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
17471 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17473 return set_die_type (die
, type
, cu
);
17478 complaint (_("unsupported DW_AT_encoding: '%s'"),
17479 dwarf_type_encoding_name (encoding
));
17480 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17484 if (name
&& strcmp (name
, "char") == 0)
17485 TYPE_NOSIGN (type
) = 1;
17487 maybe_set_alignment (cu
, die
, type
);
17489 TYPE_ENDIANITY_NOT_DEFAULT (type
) = gdbarch_byte_order (arch
) != byte_order
;
17491 return set_die_type (die
, type
, cu
);
17494 /* Parse dwarf attribute if it's a block, reference or constant and put the
17495 resulting value of the attribute into struct bound_prop.
17496 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17499 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17500 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
,
17501 struct type
*default_type
)
17503 struct dwarf2_property_baton
*baton
;
17504 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
17505 struct objfile
*objfile
= per_objfile
->objfile
;
17506 struct obstack
*obstack
= &objfile
->objfile_obstack
;
17508 gdb_assert (default_type
!= NULL
);
17510 if (attr
== NULL
|| prop
== NULL
)
17513 if (attr
->form_is_block ())
17515 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17516 baton
->property_type
= default_type
;
17517 baton
->locexpr
.per_cu
= cu
->per_cu
;
17518 baton
->locexpr
.per_objfile
= per_objfile
;
17519 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17520 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17521 switch (attr
->name
)
17523 case DW_AT_string_length
:
17524 baton
->locexpr
.is_reference
= true;
17527 baton
->locexpr
.is_reference
= false;
17530 prop
->data
.baton
= baton
;
17531 prop
->kind
= PROP_LOCEXPR
;
17532 gdb_assert (prop
->data
.baton
!= NULL
);
17534 else if (attr
->form_is_ref ())
17536 struct dwarf2_cu
*target_cu
= cu
;
17537 struct die_info
*target_die
;
17538 struct attribute
*target_attr
;
17540 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17541 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17542 if (target_attr
== NULL
)
17543 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17545 if (target_attr
== NULL
)
17548 switch (target_attr
->name
)
17550 case DW_AT_location
:
17551 if (target_attr
->form_is_section_offset ())
17553 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17554 baton
->property_type
= die_type (target_die
, target_cu
);
17555 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17556 prop
->data
.baton
= baton
;
17557 prop
->kind
= PROP_LOCLIST
;
17558 gdb_assert (prop
->data
.baton
!= NULL
);
17560 else if (target_attr
->form_is_block ())
17562 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17563 baton
->property_type
= die_type (target_die
, target_cu
);
17564 baton
->locexpr
.per_cu
= cu
->per_cu
;
17565 baton
->locexpr
.per_objfile
= per_objfile
;
17566 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17567 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17568 baton
->locexpr
.is_reference
= true;
17569 prop
->data
.baton
= baton
;
17570 prop
->kind
= PROP_LOCEXPR
;
17571 gdb_assert (prop
->data
.baton
!= NULL
);
17575 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17576 "dynamic property");
17580 case DW_AT_data_member_location
:
17584 if (!handle_data_member_location (target_die
, target_cu
,
17588 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17589 baton
->property_type
= read_type_die (target_die
->parent
,
17591 baton
->offset_info
.offset
= offset
;
17592 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17593 prop
->data
.baton
= baton
;
17594 prop
->kind
= PROP_ADDR_OFFSET
;
17599 else if (attr
->form_is_constant ())
17601 prop
->data
.const_val
= attr
->constant_value (0);
17602 prop
->kind
= PROP_CONST
;
17606 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17607 dwarf2_name (die
, cu
));
17617 dwarf2_per_cu_data::int_type (int size_in_bytes
, bool unsigned_p
) const
17619 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17620 struct type
*int_type
;
17622 /* Helper macro to examine the various builtin types. */
17623 #define TRY_TYPE(F) \
17624 int_type = (unsigned_p \
17625 ? objfile_type (objfile)->builtin_unsigned_ ## F \
17626 : objfile_type (objfile)->builtin_ ## F); \
17627 if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \
17634 TRY_TYPE (long_long
);
17638 gdb_assert_not_reached ("unable to find suitable integer type");
17644 dwarf2_per_cu_data::addr_sized_int_type (bool unsigned_p
) const
17646 int addr_size
= this->addr_size ();
17647 return int_type (addr_size
, unsigned_p
);
17650 /* Read the DW_AT_type attribute for a sub-range. If this attribute is not
17651 present (which is valid) then compute the default type based on the
17652 compilation units address size. */
17654 static struct type
*
17655 read_subrange_index_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17657 struct type
*index_type
= die_type (die
, cu
);
17659 /* Dwarf-2 specifications explicitly allows to create subrange types
17660 without specifying a base type.
17661 In that case, the base type must be set to the type of
17662 the lower bound, upper bound or count, in that order, if any of these
17663 three attributes references an object that has a type.
17664 If no base type is found, the Dwarf-2 specifications say that
17665 a signed integer type of size equal to the size of an address should
17667 For the following C code: `extern char gdb_int [];'
17668 GCC produces an empty range DIE.
17669 FIXME: muller/2010-05-28: Possible references to object for low bound,
17670 high bound or count are not yet handled by this code. */
17671 if (index_type
->code () == TYPE_CODE_VOID
)
17672 index_type
= cu
->per_cu
->addr_sized_int_type (false);
17677 /* Read the given DW_AT_subrange DIE. */
17679 static struct type
*
17680 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17682 struct type
*base_type
, *orig_base_type
;
17683 struct type
*range_type
;
17684 struct attribute
*attr
;
17685 struct dynamic_prop low
, high
;
17686 int low_default_is_valid
;
17687 int high_bound_is_count
= 0;
17689 ULONGEST negative_mask
;
17691 orig_base_type
= read_subrange_index_type (die
, cu
);
17693 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17694 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17695 creating the range type, but we use the result of check_typedef
17696 when examining properties of the type. */
17697 base_type
= check_typedef (orig_base_type
);
17699 /* The die_type call above may have already set the type for this DIE. */
17700 range_type
= get_die_type (die
, cu
);
17704 low
.kind
= PROP_CONST
;
17705 high
.kind
= PROP_CONST
;
17706 high
.data
.const_val
= 0;
17708 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17709 omitting DW_AT_lower_bound. */
17710 switch (cu
->language
)
17713 case language_cplus
:
17714 low
.data
.const_val
= 0;
17715 low_default_is_valid
= 1;
17717 case language_fortran
:
17718 low
.data
.const_val
= 1;
17719 low_default_is_valid
= 1;
17722 case language_objc
:
17723 case language_rust
:
17724 low
.data
.const_val
= 0;
17725 low_default_is_valid
= (cu
->header
.version
>= 4);
17729 case language_pascal
:
17730 low
.data
.const_val
= 1;
17731 low_default_is_valid
= (cu
->header
.version
>= 4);
17734 low
.data
.const_val
= 0;
17735 low_default_is_valid
= 0;
17739 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17740 if (attr
!= nullptr)
17741 attr_to_dynamic_prop (attr
, die
, cu
, &low
, base_type
);
17742 else if (!low_default_is_valid
)
17743 complaint (_("Missing DW_AT_lower_bound "
17744 "- DIE at %s [in module %s]"),
17745 sect_offset_str (die
->sect_off
),
17746 objfile_name (cu
->per_objfile
->objfile
));
17748 struct attribute
*attr_ub
, *attr_count
;
17749 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17750 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17752 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
17753 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
17755 /* If bounds are constant do the final calculation here. */
17756 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17757 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17759 high_bound_is_count
= 1;
17763 if (attr_ub
!= NULL
)
17764 complaint (_("Unresolved DW_AT_upper_bound "
17765 "- DIE at %s [in module %s]"),
17766 sect_offset_str (die
->sect_off
),
17767 objfile_name (cu
->per_objfile
->objfile
));
17768 if (attr_count
!= NULL
)
17769 complaint (_("Unresolved DW_AT_count "
17770 "- DIE at %s [in module %s]"),
17771 sect_offset_str (die
->sect_off
),
17772 objfile_name (cu
->per_objfile
->objfile
));
17777 struct attribute
*bias_attr
= dwarf2_attr (die
, DW_AT_GNU_bias
, cu
);
17778 if (bias_attr
!= nullptr && bias_attr
->form_is_constant ())
17779 bias
= bias_attr
->constant_value (0);
17781 /* Normally, the DWARF producers are expected to use a signed
17782 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17783 But this is unfortunately not always the case, as witnessed
17784 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17785 is used instead. To work around that ambiguity, we treat
17786 the bounds as signed, and thus sign-extend their values, when
17787 the base type is signed. */
17789 -((ULONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17790 if (low
.kind
== PROP_CONST
17791 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17792 low
.data
.const_val
|= negative_mask
;
17793 if (high
.kind
== PROP_CONST
17794 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17795 high
.data
.const_val
|= negative_mask
;
17797 /* Check for bit and byte strides. */
17798 struct dynamic_prop byte_stride_prop
;
17799 attribute
*attr_byte_stride
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
17800 if (attr_byte_stride
!= nullptr)
17802 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
17803 attr_to_dynamic_prop (attr_byte_stride
, die
, cu
, &byte_stride_prop
,
17807 struct dynamic_prop bit_stride_prop
;
17808 attribute
*attr_bit_stride
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
17809 if (attr_bit_stride
!= nullptr)
17811 /* It only makes sense to have either a bit or byte stride. */
17812 if (attr_byte_stride
!= nullptr)
17814 complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride "
17815 "- DIE at %s [in module %s]"),
17816 sect_offset_str (die
->sect_off
),
17817 objfile_name (cu
->per_objfile
->objfile
));
17818 attr_bit_stride
= nullptr;
17822 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
17823 attr_to_dynamic_prop (attr_bit_stride
, die
, cu
, &bit_stride_prop
,
17828 if (attr_byte_stride
!= nullptr
17829 || attr_bit_stride
!= nullptr)
17831 bool byte_stride_p
= (attr_byte_stride
!= nullptr);
17832 struct dynamic_prop
*stride
17833 = byte_stride_p
? &byte_stride_prop
: &bit_stride_prop
;
17836 = create_range_type_with_stride (NULL
, orig_base_type
, &low
,
17837 &high
, bias
, stride
, byte_stride_p
);
17840 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
, bias
);
17842 if (high_bound_is_count
)
17843 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17845 /* Ada expects an empty array on no boundary attributes. */
17846 if (attr
== NULL
&& cu
->language
!= language_ada
)
17847 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17849 name
= dwarf2_name (die
, cu
);
17851 range_type
->set_name (name
);
17853 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17854 if (attr
!= nullptr)
17855 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17857 maybe_set_alignment (cu
, die
, range_type
);
17859 set_die_type (die
, range_type
, cu
);
17861 /* set_die_type should be already done. */
17862 set_descriptive_type (range_type
, die
, cu
);
17867 static struct type
*
17868 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17872 type
= init_type (cu
->per_objfile
->objfile
, TYPE_CODE_VOID
, 0, NULL
);
17873 type
->set_name (dwarf2_name (die
, cu
));
17875 /* In Ada, an unspecified type is typically used when the description
17876 of the type is deferred to a different unit. When encountering
17877 such a type, we treat it as a stub, and try to resolve it later on,
17879 if (cu
->language
== language_ada
)
17880 TYPE_STUB (type
) = 1;
17882 return set_die_type (die
, type
, cu
);
17885 /* Read a single die and all its descendents. Set the die's sibling
17886 field to NULL; set other fields in the die correctly, and set all
17887 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17888 location of the info_ptr after reading all of those dies. PARENT
17889 is the parent of the die in question. */
17891 static struct die_info
*
17892 read_die_and_children (const struct die_reader_specs
*reader
,
17893 const gdb_byte
*info_ptr
,
17894 const gdb_byte
**new_info_ptr
,
17895 struct die_info
*parent
)
17897 struct die_info
*die
;
17898 const gdb_byte
*cur_ptr
;
17900 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, 0);
17903 *new_info_ptr
= cur_ptr
;
17906 store_in_ref_table (die
, reader
->cu
);
17908 if (die
->has_children
)
17909 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17913 *new_info_ptr
= cur_ptr
;
17916 die
->sibling
= NULL
;
17917 die
->parent
= parent
;
17921 /* Read a die, all of its descendents, and all of its siblings; set
17922 all of the fields of all of the dies correctly. Arguments are as
17923 in read_die_and_children. */
17925 static struct die_info
*
17926 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17927 const gdb_byte
*info_ptr
,
17928 const gdb_byte
**new_info_ptr
,
17929 struct die_info
*parent
)
17931 struct die_info
*first_die
, *last_sibling
;
17932 const gdb_byte
*cur_ptr
;
17934 cur_ptr
= info_ptr
;
17935 first_die
= last_sibling
= NULL
;
17939 struct die_info
*die
17940 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17944 *new_info_ptr
= cur_ptr
;
17951 last_sibling
->sibling
= die
;
17953 last_sibling
= die
;
17957 /* Read a die, all of its descendents, and all of its siblings; set
17958 all of the fields of all of the dies correctly. Arguments are as
17959 in read_die_and_children.
17960 This the main entry point for reading a DIE and all its children. */
17962 static struct die_info
*
17963 read_die_and_siblings (const struct die_reader_specs
*reader
,
17964 const gdb_byte
*info_ptr
,
17965 const gdb_byte
**new_info_ptr
,
17966 struct die_info
*parent
)
17968 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17969 new_info_ptr
, parent
);
17971 if (dwarf_die_debug
)
17973 fprintf_unfiltered (gdb_stdlog
,
17974 "Read die from %s@0x%x of %s:\n",
17975 reader
->die_section
->get_name (),
17976 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17977 bfd_get_filename (reader
->abfd
));
17978 dump_die (die
, dwarf_die_debug
);
17984 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
17986 The caller is responsible for filling in the extra attributes
17987 and updating (*DIEP)->num_attrs.
17988 Set DIEP to point to a newly allocated die with its information,
17989 except for its child, sibling, and parent fields. */
17991 static const gdb_byte
*
17992 read_full_die_1 (const struct die_reader_specs
*reader
,
17993 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17994 int num_extra_attrs
)
17996 unsigned int abbrev_number
, bytes_read
, i
;
17997 struct abbrev_info
*abbrev
;
17998 struct die_info
*die
;
17999 struct dwarf2_cu
*cu
= reader
->cu
;
18000 bfd
*abfd
= reader
->abfd
;
18002 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
18003 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18004 info_ptr
+= bytes_read
;
18005 if (!abbrev_number
)
18011 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
18013 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
18015 bfd_get_filename (abfd
));
18017 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
18018 die
->sect_off
= sect_off
;
18019 die
->tag
= abbrev
->tag
;
18020 die
->abbrev
= abbrev_number
;
18021 die
->has_children
= abbrev
->has_children
;
18023 /* Make the result usable.
18024 The caller needs to update num_attrs after adding the extra
18026 die
->num_attrs
= abbrev
->num_attrs
;
18028 std::vector
<int> indexes_that_need_reprocess
;
18029 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
18031 bool need_reprocess
;
18033 read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
18034 info_ptr
, &need_reprocess
);
18035 if (need_reprocess
)
18036 indexes_that_need_reprocess
.push_back (i
);
18039 struct attribute
*attr
= die
->attr (DW_AT_str_offsets_base
);
18040 if (attr
!= nullptr)
18041 cu
->str_offsets_base
= DW_UNSND (attr
);
18043 attr
= die
->attr (DW_AT_loclists_base
);
18044 if (attr
!= nullptr)
18045 cu
->loclist_base
= DW_UNSND (attr
);
18047 auto maybe_addr_base
= die
->addr_base ();
18048 if (maybe_addr_base
.has_value ())
18049 cu
->addr_base
= *maybe_addr_base
;
18050 for (int index
: indexes_that_need_reprocess
)
18051 read_attribute_reprocess (reader
, &die
->attrs
[index
]);
18056 /* Read a die and all its attributes.
18057 Set DIEP to point to a newly allocated die with its information,
18058 except for its child, sibling, and parent fields. */
18060 static const gdb_byte
*
18061 read_full_die (const struct die_reader_specs
*reader
,
18062 struct die_info
**diep
, const gdb_byte
*info_ptr
)
18064 const gdb_byte
*result
;
18066 result
= read_full_die_1 (reader
, diep
, info_ptr
, 0);
18068 if (dwarf_die_debug
)
18070 fprintf_unfiltered (gdb_stdlog
,
18071 "Read die from %s@0x%x of %s:\n",
18072 reader
->die_section
->get_name (),
18073 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18074 bfd_get_filename (reader
->abfd
));
18075 dump_die (*diep
, dwarf_die_debug
);
18082 /* Returns nonzero if TAG represents a type that we might generate a partial
18086 is_type_tag_for_partial (int tag
)
18091 /* Some types that would be reasonable to generate partial symbols for,
18092 that we don't at present. */
18093 case DW_TAG_array_type
:
18094 case DW_TAG_file_type
:
18095 case DW_TAG_ptr_to_member_type
:
18096 case DW_TAG_set_type
:
18097 case DW_TAG_string_type
:
18098 case DW_TAG_subroutine_type
:
18100 case DW_TAG_base_type
:
18101 case DW_TAG_class_type
:
18102 case DW_TAG_interface_type
:
18103 case DW_TAG_enumeration_type
:
18104 case DW_TAG_structure_type
:
18105 case DW_TAG_subrange_type
:
18106 case DW_TAG_typedef
:
18107 case DW_TAG_union_type
:
18114 /* Load all DIEs that are interesting for partial symbols into memory. */
18116 static struct partial_die_info
*
18117 load_partial_dies (const struct die_reader_specs
*reader
,
18118 const gdb_byte
*info_ptr
, int building_psymtab
)
18120 struct dwarf2_cu
*cu
= reader
->cu
;
18121 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
18122 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18123 unsigned int bytes_read
;
18124 unsigned int load_all
= 0;
18125 int nesting_level
= 1;
18130 gdb_assert (cu
->per_cu
!= NULL
);
18131 if (cu
->per_cu
->load_all_dies
)
18135 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18139 &cu
->comp_unit_obstack
,
18140 hashtab_obstack_allocate
,
18141 dummy_obstack_deallocate
);
18145 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18147 /* A NULL abbrev means the end of a series of children. */
18148 if (abbrev
== NULL
)
18150 if (--nesting_level
== 0)
18153 info_ptr
+= bytes_read
;
18154 last_die
= parent_die
;
18155 parent_die
= parent_die
->die_parent
;
18159 /* Check for template arguments. We never save these; if
18160 they're seen, we just mark the parent, and go on our way. */
18161 if (parent_die
!= NULL
18162 && cu
->language
== language_cplus
18163 && (abbrev
->tag
== DW_TAG_template_type_param
18164 || abbrev
->tag
== DW_TAG_template_value_param
))
18166 parent_die
->has_template_arguments
= 1;
18170 /* We don't need a partial DIE for the template argument. */
18171 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18176 /* We only recurse into c++ subprograms looking for template arguments.
18177 Skip their other children. */
18179 && cu
->language
== language_cplus
18180 && parent_die
!= NULL
18181 && parent_die
->tag
== DW_TAG_subprogram
)
18183 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18187 /* Check whether this DIE is interesting enough to save. Normally
18188 we would not be interested in members here, but there may be
18189 later variables referencing them via DW_AT_specification (for
18190 static members). */
18192 && !is_type_tag_for_partial (abbrev
->tag
)
18193 && abbrev
->tag
!= DW_TAG_constant
18194 && abbrev
->tag
!= DW_TAG_enumerator
18195 && abbrev
->tag
!= DW_TAG_subprogram
18196 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18197 && abbrev
->tag
!= DW_TAG_lexical_block
18198 && abbrev
->tag
!= DW_TAG_variable
18199 && abbrev
->tag
!= DW_TAG_namespace
18200 && abbrev
->tag
!= DW_TAG_module
18201 && abbrev
->tag
!= DW_TAG_member
18202 && abbrev
->tag
!= DW_TAG_imported_unit
18203 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18205 /* Otherwise we skip to the next sibling, if any. */
18206 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18210 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18213 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18215 /* This two-pass algorithm for processing partial symbols has a
18216 high cost in cache pressure. Thus, handle some simple cases
18217 here which cover the majority of C partial symbols. DIEs
18218 which neither have specification tags in them, nor could have
18219 specification tags elsewhere pointing at them, can simply be
18220 processed and discarded.
18222 This segment is also optional; scan_partial_symbols and
18223 add_partial_symbol will handle these DIEs if we chain
18224 them in normally. When compilers which do not emit large
18225 quantities of duplicate debug information are more common,
18226 this code can probably be removed. */
18228 /* Any complete simple types at the top level (pretty much all
18229 of them, for a language without namespaces), can be processed
18231 if (parent_die
== NULL
18232 && pdi
.has_specification
== 0
18233 && pdi
.is_declaration
== 0
18234 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18235 || pdi
.tag
== DW_TAG_base_type
18236 || pdi
.tag
== DW_TAG_subrange_type
))
18238 if (building_psymtab
&& pdi
.name
!= NULL
)
18239 add_psymbol_to_list (pdi
.name
, false,
18240 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
18241 psymbol_placement::STATIC
,
18242 0, cu
->language
, objfile
);
18243 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18247 /* The exception for DW_TAG_typedef with has_children above is
18248 a workaround of GCC PR debug/47510. In the case of this complaint
18249 type_name_or_error will error on such types later.
18251 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18252 it could not find the child DIEs referenced later, this is checked
18253 above. In correct DWARF DW_TAG_typedef should have no children. */
18255 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18256 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18257 "- DIE at %s [in module %s]"),
18258 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18260 /* If we're at the second level, and we're an enumerator, and
18261 our parent has no specification (meaning possibly lives in a
18262 namespace elsewhere), then we can add the partial symbol now
18263 instead of queueing it. */
18264 if (pdi
.tag
== DW_TAG_enumerator
18265 && parent_die
!= NULL
18266 && parent_die
->die_parent
== NULL
18267 && parent_die
->tag
== DW_TAG_enumeration_type
18268 && parent_die
->has_specification
== 0)
18270 if (pdi
.name
== NULL
)
18271 complaint (_("malformed enumerator DIE ignored"));
18272 else if (building_psymtab
)
18273 add_psymbol_to_list (pdi
.name
, false,
18274 VAR_DOMAIN
, LOC_CONST
, -1,
18275 cu
->language
== language_cplus
18276 ? psymbol_placement::GLOBAL
18277 : psymbol_placement::STATIC
,
18278 0, cu
->language
, objfile
);
18280 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18284 struct partial_die_info
*part_die
18285 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18287 /* We'll save this DIE so link it in. */
18288 part_die
->die_parent
= parent_die
;
18289 part_die
->die_sibling
= NULL
;
18290 part_die
->die_child
= NULL
;
18292 if (last_die
&& last_die
== parent_die
)
18293 last_die
->die_child
= part_die
;
18295 last_die
->die_sibling
= part_die
;
18297 last_die
= part_die
;
18299 if (first_die
== NULL
)
18300 first_die
= part_die
;
18302 /* Maybe add the DIE to the hash table. Not all DIEs that we
18303 find interesting need to be in the hash table, because we
18304 also have the parent/sibling/child chains; only those that we
18305 might refer to by offset later during partial symbol reading.
18307 For now this means things that might have be the target of a
18308 DW_AT_specification, DW_AT_abstract_origin, or
18309 DW_AT_extension. DW_AT_extension will refer only to
18310 namespaces; DW_AT_abstract_origin refers to functions (and
18311 many things under the function DIE, but we do not recurse
18312 into function DIEs during partial symbol reading) and
18313 possibly variables as well; DW_AT_specification refers to
18314 declarations. Declarations ought to have the DW_AT_declaration
18315 flag. It happens that GCC forgets to put it in sometimes, but
18316 only for functions, not for types.
18318 Adding more things than necessary to the hash table is harmless
18319 except for the performance cost. Adding too few will result in
18320 wasted time in find_partial_die, when we reread the compilation
18321 unit with load_all_dies set. */
18324 || abbrev
->tag
== DW_TAG_constant
18325 || abbrev
->tag
== DW_TAG_subprogram
18326 || abbrev
->tag
== DW_TAG_variable
18327 || abbrev
->tag
== DW_TAG_namespace
18328 || part_die
->is_declaration
)
18332 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18333 to_underlying (part_die
->sect_off
),
18338 /* For some DIEs we want to follow their children (if any). For C
18339 we have no reason to follow the children of structures; for other
18340 languages we have to, so that we can get at method physnames
18341 to infer fully qualified class names, for DW_AT_specification,
18342 and for C++ template arguments. For C++, we also look one level
18343 inside functions to find template arguments (if the name of the
18344 function does not already contain the template arguments).
18346 For Ada and Fortran, we need to scan the children of subprograms
18347 and lexical blocks as well because these languages allow the
18348 definition of nested entities that could be interesting for the
18349 debugger, such as nested subprograms for instance. */
18350 if (last_die
->has_children
18352 || last_die
->tag
== DW_TAG_namespace
18353 || last_die
->tag
== DW_TAG_module
18354 || last_die
->tag
== DW_TAG_enumeration_type
18355 || (cu
->language
== language_cplus
18356 && last_die
->tag
== DW_TAG_subprogram
18357 && (last_die
->name
== NULL
18358 || strchr (last_die
->name
, '<') == NULL
))
18359 || (cu
->language
!= language_c
18360 && (last_die
->tag
== DW_TAG_class_type
18361 || last_die
->tag
== DW_TAG_interface_type
18362 || last_die
->tag
== DW_TAG_structure_type
18363 || last_die
->tag
== DW_TAG_union_type
))
18364 || ((cu
->language
== language_ada
18365 || cu
->language
== language_fortran
)
18366 && (last_die
->tag
== DW_TAG_subprogram
18367 || last_die
->tag
== DW_TAG_lexical_block
))))
18370 parent_die
= last_die
;
18374 /* Otherwise we skip to the next sibling, if any. */
18375 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18377 /* Back to the top, do it again. */
18381 partial_die_info::partial_die_info (sect_offset sect_off_
,
18382 struct abbrev_info
*abbrev
)
18383 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18387 /* Read a minimal amount of information into the minimal die structure.
18388 INFO_PTR should point just after the initial uleb128 of a DIE. */
18391 partial_die_info::read (const struct die_reader_specs
*reader
,
18392 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18394 struct dwarf2_cu
*cu
= reader
->cu
;
18395 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
18397 int has_low_pc_attr
= 0;
18398 int has_high_pc_attr
= 0;
18399 int high_pc_relative
= 0;
18401 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18404 bool need_reprocess
;
18405 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
],
18406 info_ptr
, &need_reprocess
);
18407 /* String and address offsets that need to do the reprocessing have
18408 already been read at this point, so there is no need to wait until
18409 the loop terminates to do the reprocessing. */
18410 if (need_reprocess
)
18411 read_attribute_reprocess (reader
, &attr
);
18412 /* Store the data if it is of an attribute we want to keep in a
18413 partial symbol table. */
18419 case DW_TAG_compile_unit
:
18420 case DW_TAG_partial_unit
:
18421 case DW_TAG_type_unit
:
18422 /* Compilation units have a DW_AT_name that is a filename, not
18423 a source language identifier. */
18424 case DW_TAG_enumeration_type
:
18425 case DW_TAG_enumerator
:
18426 /* These tags always have simple identifiers already; no need
18427 to canonicalize them. */
18428 name
= DW_STRING (&attr
);
18432 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18435 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
, objfile
);
18440 case DW_AT_linkage_name
:
18441 case DW_AT_MIPS_linkage_name
:
18442 /* Note that both forms of linkage name might appear. We
18443 assume they will be the same, and we only store the last
18445 linkage_name
= attr
.value_as_string ();
18446 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
18447 See https://github.com/rust-lang/rust/issues/32925. */
18448 if (cu
->language
== language_rust
&& linkage_name
!= NULL
18449 && strchr (linkage_name
, '{') != NULL
)
18450 linkage_name
= NULL
;
18453 has_low_pc_attr
= 1;
18454 lowpc
= attr
.value_as_address ();
18456 case DW_AT_high_pc
:
18457 has_high_pc_attr
= 1;
18458 highpc
= attr
.value_as_address ();
18459 if (cu
->header
.version
>= 4 && attr
.form_is_constant ())
18460 high_pc_relative
= 1;
18462 case DW_AT_location
:
18463 /* Support the .debug_loc offsets. */
18464 if (attr
.form_is_block ())
18466 d
.locdesc
= DW_BLOCK (&attr
);
18468 else if (attr
.form_is_section_offset ())
18470 dwarf2_complex_location_expr_complaint ();
18474 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18475 "partial symbol information");
18478 case DW_AT_external
:
18479 is_external
= DW_UNSND (&attr
);
18481 case DW_AT_declaration
:
18482 is_declaration
= DW_UNSND (&attr
);
18487 case DW_AT_abstract_origin
:
18488 case DW_AT_specification
:
18489 case DW_AT_extension
:
18490 has_specification
= 1;
18491 spec_offset
= attr
.get_ref_die_offset ();
18492 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18493 || cu
->per_cu
->is_dwz
);
18495 case DW_AT_sibling
:
18496 /* Ignore absolute siblings, they might point outside of
18497 the current compile unit. */
18498 if (attr
.form
== DW_FORM_ref_addr
)
18499 complaint (_("ignoring absolute DW_AT_sibling"));
18502 const gdb_byte
*buffer
= reader
->buffer
;
18503 sect_offset off
= attr
.get_ref_die_offset ();
18504 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18506 if (sibling_ptr
< info_ptr
)
18507 complaint (_("DW_AT_sibling points backwards"));
18508 else if (sibling_ptr
> reader
->buffer_end
)
18509 reader
->die_section
->overflow_complaint ();
18511 sibling
= sibling_ptr
;
18514 case DW_AT_byte_size
:
18517 case DW_AT_const_value
:
18518 has_const_value
= 1;
18520 case DW_AT_calling_convention
:
18521 /* DWARF doesn't provide a way to identify a program's source-level
18522 entry point. DW_AT_calling_convention attributes are only meant
18523 to describe functions' calling conventions.
18525 However, because it's a necessary piece of information in
18526 Fortran, and before DWARF 4 DW_CC_program was the only
18527 piece of debugging information whose definition refers to
18528 a 'main program' at all, several compilers marked Fortran
18529 main programs with DW_CC_program --- even when those
18530 functions use the standard calling conventions.
18532 Although DWARF now specifies a way to provide this
18533 information, we support this practice for backward
18535 if (DW_UNSND (&attr
) == DW_CC_program
18536 && cu
->language
== language_fortran
)
18537 main_subprogram
= 1;
18540 if (DW_UNSND (&attr
) == DW_INL_inlined
18541 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18542 may_be_inlined
= 1;
18546 if (tag
== DW_TAG_imported_unit
)
18548 d
.sect_off
= attr
.get_ref_die_offset ();
18549 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18550 || cu
->per_cu
->is_dwz
);
18554 case DW_AT_main_subprogram
:
18555 main_subprogram
= DW_UNSND (&attr
);
18560 /* It would be nice to reuse dwarf2_get_pc_bounds here,
18561 but that requires a full DIE, so instead we just
18563 int need_ranges_base
= tag
!= DW_TAG_compile_unit
;
18564 unsigned int ranges_offset
= (DW_UNSND (&attr
)
18565 + (need_ranges_base
18569 /* Value of the DW_AT_ranges attribute is the offset in the
18570 .debug_ranges section. */
18571 if (dwarf2_ranges_read (ranges_offset
, &lowpc
, &highpc
, cu
,
18582 /* For Ada, if both the name and the linkage name appear, we prefer
18583 the latter. This lets "catch exception" work better, regardless
18584 of the order in which the name and linkage name were emitted.
18585 Really, though, this is just a workaround for the fact that gdb
18586 doesn't store both the name and the linkage name. */
18587 if (cu
->language
== language_ada
&& linkage_name
!= nullptr)
18588 name
= linkage_name
;
18590 if (high_pc_relative
)
18593 if (has_low_pc_attr
&& has_high_pc_attr
)
18595 /* When using the GNU linker, .gnu.linkonce. sections are used to
18596 eliminate duplicate copies of functions and vtables and such.
18597 The linker will arbitrarily choose one and discard the others.
18598 The AT_*_pc values for such functions refer to local labels in
18599 these sections. If the section from that file was discarded, the
18600 labels are not in the output, so the relocs get a value of 0.
18601 If this is a discarded function, mark the pc bounds as invalid,
18602 so that GDB will ignore it. */
18603 if (lowpc
== 0 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
18605 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18606 struct gdbarch
*gdbarch
= objfile
->arch ();
18608 complaint (_("DW_AT_low_pc %s is zero "
18609 "for DIE at %s [in module %s]"),
18610 paddress (gdbarch
, lowpc
),
18611 sect_offset_str (sect_off
),
18612 objfile_name (objfile
));
18614 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18615 else if (lowpc
>= highpc
)
18617 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18618 struct gdbarch
*gdbarch
= objfile
->arch ();
18620 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18621 "for DIE at %s [in module %s]"),
18622 paddress (gdbarch
, lowpc
),
18623 paddress (gdbarch
, highpc
),
18624 sect_offset_str (sect_off
),
18625 objfile_name (objfile
));
18634 /* Find a cached partial DIE at OFFSET in CU. */
18636 struct partial_die_info
*
18637 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18639 struct partial_die_info
*lookup_die
= NULL
;
18640 struct partial_die_info
part_die (sect_off
);
18642 lookup_die
= ((struct partial_die_info
*)
18643 htab_find_with_hash (partial_dies
, &part_die
,
18644 to_underlying (sect_off
)));
18649 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18650 except in the case of .debug_types DIEs which do not reference
18651 outside their CU (they do however referencing other types via
18652 DW_FORM_ref_sig8). */
18654 static const struct cu_partial_die_info
18655 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18657 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
18658 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18659 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18660 struct partial_die_info
*pd
= NULL
;
18662 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18663 && cu
->header
.offset_in_cu_p (sect_off
))
18665 pd
= cu
->find_partial_die (sect_off
);
18668 /* We missed recording what we needed.
18669 Load all dies and try again. */
18670 per_cu
= cu
->per_cu
;
18674 /* TUs don't reference other CUs/TUs (except via type signatures). */
18675 if (cu
->per_cu
->is_debug_types
)
18677 error (_("Dwarf Error: Type Unit at offset %s contains"
18678 " external reference to offset %s [in module %s].\n"),
18679 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18680 bfd_get_filename (objfile
->obfd
));
18682 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18683 dwarf2_per_objfile
);
18685 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18686 load_partial_comp_unit (per_cu
, cu
->per_objfile
);
18688 per_cu
->cu
->last_used
= 0;
18689 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18692 /* If we didn't find it, and not all dies have been loaded,
18693 load them all and try again. */
18695 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18697 per_cu
->load_all_dies
= 1;
18699 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18700 THIS_CU->cu may already be in use. So we can't just free it and
18701 replace its DIEs with the ones we read in. Instead, we leave those
18702 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18703 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18705 load_partial_comp_unit (per_cu
, cu
->per_objfile
);
18707 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18711 internal_error (__FILE__
, __LINE__
,
18712 _("could not find partial DIE %s "
18713 "in cache [from module %s]\n"),
18714 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18715 return { per_cu
->cu
, pd
};
18718 /* See if we can figure out if the class lives in a namespace. We do
18719 this by looking for a member function; its demangled name will
18720 contain namespace info, if there is any. */
18723 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18724 struct dwarf2_cu
*cu
)
18726 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18727 what template types look like, because the demangler
18728 frequently doesn't give the same name as the debug info. We
18729 could fix this by only using the demangled name to get the
18730 prefix (but see comment in read_structure_type). */
18732 struct partial_die_info
*real_pdi
;
18733 struct partial_die_info
*child_pdi
;
18735 /* If this DIE (this DIE's specification, if any) has a parent, then
18736 we should not do this. We'll prepend the parent's fully qualified
18737 name when we create the partial symbol. */
18739 real_pdi
= struct_pdi
;
18740 while (real_pdi
->has_specification
)
18742 auto res
= find_partial_die (real_pdi
->spec_offset
,
18743 real_pdi
->spec_is_dwz
, cu
);
18744 real_pdi
= res
.pdi
;
18748 if (real_pdi
->die_parent
!= NULL
)
18751 for (child_pdi
= struct_pdi
->die_child
;
18753 child_pdi
= child_pdi
->die_sibling
)
18755 if (child_pdi
->tag
== DW_TAG_subprogram
18756 && child_pdi
->linkage_name
!= NULL
)
18758 gdb::unique_xmalloc_ptr
<char> actual_class_name
18759 (language_class_name_from_physname (cu
->language_defn
,
18760 child_pdi
->linkage_name
));
18761 if (actual_class_name
!= NULL
)
18763 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
18764 struct_pdi
->name
= objfile
->intern (actual_class_name
.get ());
18771 /* Return true if a DIE with TAG may have the DW_AT_const_value
18775 can_have_DW_AT_const_value_p (enum dwarf_tag tag
)
18779 case DW_TAG_constant
:
18780 case DW_TAG_enumerator
:
18781 case DW_TAG_formal_parameter
:
18782 case DW_TAG_template_value_param
:
18783 case DW_TAG_variable
:
18791 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18793 /* Once we've fixed up a die, there's no point in doing so again.
18794 This also avoids a memory leak if we were to call
18795 guess_partial_die_structure_name multiple times. */
18799 /* If we found a reference attribute and the DIE has no name, try
18800 to find a name in the referred to DIE. */
18802 if (name
== NULL
&& has_specification
)
18804 struct partial_die_info
*spec_die
;
18806 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18807 spec_die
= res
.pdi
;
18810 spec_die
->fixup (cu
);
18812 if (spec_die
->name
)
18814 name
= spec_die
->name
;
18816 /* Copy DW_AT_external attribute if it is set. */
18817 if (spec_die
->is_external
)
18818 is_external
= spec_die
->is_external
;
18822 if (!has_const_value
&& has_specification
18823 && can_have_DW_AT_const_value_p (tag
))
18825 struct partial_die_info
*spec_die
;
18827 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18828 spec_die
= res
.pdi
;
18831 spec_die
->fixup (cu
);
18833 if (spec_die
->has_const_value
)
18835 /* Copy DW_AT_const_value attribute if it is set. */
18836 has_const_value
= spec_die
->has_const_value
;
18840 /* Set default names for some unnamed DIEs. */
18842 if (name
== NULL
&& tag
== DW_TAG_namespace
)
18843 name
= CP_ANONYMOUS_NAMESPACE_STR
;
18845 /* If there is no parent die to provide a namespace, and there are
18846 children, see if we can determine the namespace from their linkage
18848 if (cu
->language
== language_cplus
18849 && !cu
->per_objfile
->per_bfd
->types
.empty ()
18850 && die_parent
== NULL
18852 && (tag
== DW_TAG_class_type
18853 || tag
== DW_TAG_structure_type
18854 || tag
== DW_TAG_union_type
))
18855 guess_partial_die_structure_name (this, cu
);
18857 /* GCC might emit a nameless struct or union that has a linkage
18858 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18860 && (tag
== DW_TAG_class_type
18861 || tag
== DW_TAG_interface_type
18862 || tag
== DW_TAG_structure_type
18863 || tag
== DW_TAG_union_type
)
18864 && linkage_name
!= NULL
)
18866 gdb::unique_xmalloc_ptr
<char> demangled
18867 (gdb_demangle (linkage_name
, DMGL_TYPES
));
18868 if (demangled
!= nullptr)
18872 /* Strip any leading namespaces/classes, keep only the base name.
18873 DW_AT_name for named DIEs does not contain the prefixes. */
18874 base
= strrchr (demangled
.get (), ':');
18875 if (base
&& base
> demangled
.get () && base
[-1] == ':')
18878 base
= demangled
.get ();
18880 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
18881 name
= objfile
->intern (base
);
18888 /* Read the .debug_loclists header contents from the given SECTION in the
18891 read_loclist_header (struct loclist_header
*header
,
18892 struct dwarf2_section_info
*section
)
18894 unsigned int bytes_read
;
18895 bfd
*abfd
= section
->get_bfd_owner ();
18896 const gdb_byte
*info_ptr
= section
->buffer
;
18897 header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
18898 info_ptr
+= bytes_read
;
18899 header
->version
= read_2_bytes (abfd
, info_ptr
);
18901 header
->addr_size
= read_1_byte (abfd
, info_ptr
);
18903 header
->segment_collector_size
= read_1_byte (abfd
, info_ptr
);
18905 header
->offset_entry_count
= read_4_bytes (abfd
, info_ptr
);
18908 /* Return the DW_AT_loclists_base value for the CU. */
18910 lookup_loclist_base (struct dwarf2_cu
*cu
)
18912 /* For the .dwo unit, the loclist_base points to the first offset following
18913 the header. The header consists of the following entities-
18914 1. Unit Length (4 bytes for 32 bit DWARF format, and 12 bytes for the 64
18916 2. version (2 bytes)
18917 3. address size (1 byte)
18918 4. segment selector size (1 byte)
18919 5. offset entry count (4 bytes)
18920 These sizes are derived as per the DWARFv5 standard. */
18921 if (cu
->dwo_unit
!= nullptr)
18923 if (cu
->header
.initial_length_size
== 4)
18924 return LOCLIST_HEADER_SIZE32
;
18925 return LOCLIST_HEADER_SIZE64
;
18927 return cu
->loclist_base
;
18930 /* Given a DW_FORM_loclistx value LOCLIST_INDEX, fetch the offset from the
18931 array of offsets in the .debug_loclists section. */
18933 read_loclist_index (struct dwarf2_cu
*cu
, ULONGEST loclist_index
)
18935 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
18936 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18937 bfd
*abfd
= objfile
->obfd
;
18938 ULONGEST loclist_base
= lookup_loclist_base (cu
);
18939 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
18941 section
->read (objfile
);
18942 if (section
->buffer
== NULL
)
18943 complaint (_("DW_FORM_loclistx used without .debug_loclists "
18944 "section [in module %s]"), objfile_name (objfile
));
18945 struct loclist_header header
;
18946 read_loclist_header (&header
, section
);
18947 if (loclist_index
>= header
.offset_entry_count
)
18948 complaint (_("DW_FORM_loclistx pointing outside of "
18949 ".debug_loclists offset array [in module %s]"),
18950 objfile_name (objfile
));
18951 if (loclist_base
+ loclist_index
* cu
->header
.offset_size
18953 complaint (_("DW_FORM_loclistx pointing outside of "
18954 ".debug_loclists section [in module %s]"),
18955 objfile_name (objfile
));
18956 const gdb_byte
*info_ptr
18957 = section
->buffer
+ loclist_base
+ loclist_index
* cu
->header
.offset_size
;
18959 if (cu
->header
.offset_size
== 4)
18960 return bfd_get_32 (abfd
, info_ptr
) + loclist_base
;
18962 return bfd_get_64 (abfd
, info_ptr
) + loclist_base
;
18965 /* Process the attributes that had to be skipped in the first round. These
18966 attributes are the ones that need str_offsets_base or addr_base attributes.
18967 They could not have been processed in the first round, because at the time
18968 the values of str_offsets_base or addr_base may not have been known. */
18970 read_attribute_reprocess (const struct die_reader_specs
*reader
,
18971 struct attribute
*attr
)
18973 struct dwarf2_cu
*cu
= reader
->cu
;
18974 switch (attr
->form
)
18976 case DW_FORM_addrx
:
18977 case DW_FORM_GNU_addr_index
:
18978 DW_ADDR (attr
) = read_addr_index (cu
, DW_UNSND (attr
));
18980 case DW_FORM_loclistx
:
18981 DW_UNSND (attr
) = read_loclist_index (cu
, DW_UNSND (attr
));
18984 case DW_FORM_strx1
:
18985 case DW_FORM_strx2
:
18986 case DW_FORM_strx3
:
18987 case DW_FORM_strx4
:
18988 case DW_FORM_GNU_str_index
:
18990 unsigned int str_index
= DW_UNSND (attr
);
18991 if (reader
->dwo_file
!= NULL
)
18993 DW_STRING (attr
) = read_dwo_str_index (reader
, str_index
);
18994 DW_STRING_IS_CANONICAL (attr
) = 0;
18998 DW_STRING (attr
) = read_stub_str_index (cu
, str_index
);
18999 DW_STRING_IS_CANONICAL (attr
) = 0;
19004 gdb_assert_not_reached (_("Unexpected DWARF form."));
19008 /* Read an attribute value described by an attribute form. */
19010 static const gdb_byte
*
19011 read_attribute_value (const struct die_reader_specs
*reader
,
19012 struct attribute
*attr
, unsigned form
,
19013 LONGEST implicit_const
, const gdb_byte
*info_ptr
,
19014 bool *need_reprocess
)
19016 struct dwarf2_cu
*cu
= reader
->cu
;
19017 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
19018 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19019 bfd
*abfd
= reader
->abfd
;
19020 struct comp_unit_head
*cu_header
= &cu
->header
;
19021 unsigned int bytes_read
;
19022 struct dwarf_block
*blk
;
19023 *need_reprocess
= false;
19025 attr
->form
= (enum dwarf_form
) form
;
19028 case DW_FORM_ref_addr
:
19029 if (cu
->header
.version
== 2)
19030 DW_UNSND (attr
) = cu
->header
.read_address (abfd
, info_ptr
,
19033 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
,
19035 info_ptr
+= bytes_read
;
19037 case DW_FORM_GNU_ref_alt
:
19038 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
, &bytes_read
);
19039 info_ptr
+= bytes_read
;
19043 struct gdbarch
*gdbarch
= objfile
->arch ();
19044 DW_ADDR (attr
) = cu
->header
.read_address (abfd
, info_ptr
, &bytes_read
);
19045 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
19046 info_ptr
+= bytes_read
;
19049 case DW_FORM_block2
:
19050 blk
= dwarf_alloc_block (cu
);
19051 blk
->size
= read_2_bytes (abfd
, info_ptr
);
19053 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19054 info_ptr
+= blk
->size
;
19055 DW_BLOCK (attr
) = blk
;
19057 case DW_FORM_block4
:
19058 blk
= dwarf_alloc_block (cu
);
19059 blk
->size
= read_4_bytes (abfd
, info_ptr
);
19061 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19062 info_ptr
+= blk
->size
;
19063 DW_BLOCK (attr
) = blk
;
19065 case DW_FORM_data2
:
19066 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
19069 case DW_FORM_data4
:
19070 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
19073 case DW_FORM_data8
:
19074 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
19077 case DW_FORM_data16
:
19078 blk
= dwarf_alloc_block (cu
);
19080 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
19082 DW_BLOCK (attr
) = blk
;
19084 case DW_FORM_sec_offset
:
19085 DW_UNSND (attr
) = cu
->header
.read_offset (abfd
, info_ptr
, &bytes_read
);
19086 info_ptr
+= bytes_read
;
19088 case DW_FORM_loclistx
:
19090 *need_reprocess
= true;
19091 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19092 info_ptr
+= bytes_read
;
19095 case DW_FORM_string
:
19096 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
19097 DW_STRING_IS_CANONICAL (attr
) = 0;
19098 info_ptr
+= bytes_read
;
19101 if (!cu
->per_cu
->is_dwz
)
19103 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
19104 abfd
, info_ptr
, cu_header
,
19106 DW_STRING_IS_CANONICAL (attr
) = 0;
19107 info_ptr
+= bytes_read
;
19111 case DW_FORM_line_strp
:
19112 if (!cu
->per_cu
->is_dwz
)
19115 = dwarf2_per_objfile
->read_line_string (info_ptr
, cu_header
,
19117 DW_STRING_IS_CANONICAL (attr
) = 0;
19118 info_ptr
+= bytes_read
;
19122 case DW_FORM_GNU_strp_alt
:
19124 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
->per_bfd
);
19125 LONGEST str_offset
= cu_header
->read_offset (abfd
, info_ptr
,
19128 DW_STRING (attr
) = dwz
->read_string (objfile
, str_offset
);
19129 DW_STRING_IS_CANONICAL (attr
) = 0;
19130 info_ptr
+= bytes_read
;
19133 case DW_FORM_exprloc
:
19134 case DW_FORM_block
:
19135 blk
= dwarf_alloc_block (cu
);
19136 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19137 info_ptr
+= bytes_read
;
19138 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19139 info_ptr
+= blk
->size
;
19140 DW_BLOCK (attr
) = blk
;
19142 case DW_FORM_block1
:
19143 blk
= dwarf_alloc_block (cu
);
19144 blk
->size
= read_1_byte (abfd
, info_ptr
);
19146 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19147 info_ptr
+= blk
->size
;
19148 DW_BLOCK (attr
) = blk
;
19150 case DW_FORM_data1
:
19151 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19155 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19158 case DW_FORM_flag_present
:
19159 DW_UNSND (attr
) = 1;
19161 case DW_FORM_sdata
:
19162 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19163 info_ptr
+= bytes_read
;
19165 case DW_FORM_udata
:
19166 case DW_FORM_rnglistx
:
19167 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19168 info_ptr
+= bytes_read
;
19171 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19172 + read_1_byte (abfd
, info_ptr
));
19176 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19177 + read_2_bytes (abfd
, info_ptr
));
19181 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19182 + read_4_bytes (abfd
, info_ptr
));
19186 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19187 + read_8_bytes (abfd
, info_ptr
));
19190 case DW_FORM_ref_sig8
:
19191 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19194 case DW_FORM_ref_udata
:
19195 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19196 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19197 info_ptr
+= bytes_read
;
19199 case DW_FORM_indirect
:
19200 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19201 info_ptr
+= bytes_read
;
19202 if (form
== DW_FORM_implicit_const
)
19204 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19205 info_ptr
+= bytes_read
;
19207 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19208 info_ptr
, need_reprocess
);
19210 case DW_FORM_implicit_const
:
19211 DW_SND (attr
) = implicit_const
;
19213 case DW_FORM_addrx
:
19214 case DW_FORM_GNU_addr_index
:
19215 *need_reprocess
= true;
19216 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19217 info_ptr
+= bytes_read
;
19220 case DW_FORM_strx1
:
19221 case DW_FORM_strx2
:
19222 case DW_FORM_strx3
:
19223 case DW_FORM_strx4
:
19224 case DW_FORM_GNU_str_index
:
19226 ULONGEST str_index
;
19227 if (form
== DW_FORM_strx1
)
19229 str_index
= read_1_byte (abfd
, info_ptr
);
19232 else if (form
== DW_FORM_strx2
)
19234 str_index
= read_2_bytes (abfd
, info_ptr
);
19237 else if (form
== DW_FORM_strx3
)
19239 str_index
= read_3_bytes (abfd
, info_ptr
);
19242 else if (form
== DW_FORM_strx4
)
19244 str_index
= read_4_bytes (abfd
, info_ptr
);
19249 str_index
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19250 info_ptr
+= bytes_read
;
19252 *need_reprocess
= true;
19253 DW_UNSND (attr
) = str_index
;
19257 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19258 dwarf_form_name (form
),
19259 bfd_get_filename (abfd
));
19263 if (cu
->per_cu
->is_dwz
&& attr
->form_is_ref ())
19264 attr
->form
= DW_FORM_GNU_ref_alt
;
19266 /* We have seen instances where the compiler tried to emit a byte
19267 size attribute of -1 which ended up being encoded as an unsigned
19268 0xffffffff. Although 0xffffffff is technically a valid size value,
19269 an object of this size seems pretty unlikely so we can relatively
19270 safely treat these cases as if the size attribute was invalid and
19271 treat them as zero by default. */
19272 if (attr
->name
== DW_AT_byte_size
19273 && form
== DW_FORM_data4
19274 && DW_UNSND (attr
) >= 0xffffffff)
19277 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19278 hex_string (DW_UNSND (attr
)));
19279 DW_UNSND (attr
) = 0;
19285 /* Read an attribute described by an abbreviated attribute. */
19287 static const gdb_byte
*
19288 read_attribute (const struct die_reader_specs
*reader
,
19289 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19290 const gdb_byte
*info_ptr
, bool *need_reprocess
)
19292 attr
->name
= abbrev
->name
;
19293 return read_attribute_value (reader
, attr
, abbrev
->form
,
19294 abbrev
->implicit_const
, info_ptr
,
19298 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19300 static const char *
19301 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19302 LONGEST str_offset
)
19304 return dwarf2_per_objfile
->per_bfd
->str
.read_string
19305 (dwarf2_per_objfile
->objfile
, str_offset
, "DW_FORM_strp");
19308 /* Return pointer to string at .debug_str offset as read from BUF.
19309 BUF is assumed to be in a compilation unit described by CU_HEADER.
19310 Return *BYTES_READ_PTR count of bytes read from BUF. */
19312 static const char *
19313 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19314 const gdb_byte
*buf
,
19315 const struct comp_unit_head
*cu_header
,
19316 unsigned int *bytes_read_ptr
)
19318 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
19320 return read_indirect_string_at_offset (dwarf2_per_objfile
, str_offset
);
19326 dwarf2_per_objfile::read_line_string (const gdb_byte
*buf
,
19327 const struct comp_unit_head
*cu_header
,
19328 unsigned int *bytes_read_ptr
)
19330 bfd
*abfd
= objfile
->obfd
;
19331 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
19333 return per_bfd
->line_str
.read_string (objfile
, str_offset
, "DW_FORM_line_strp");
19336 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19337 ADDR_BASE is the DW_AT_addr_base (DW_AT_GNU_addr_base) attribute or zero.
19338 ADDR_SIZE is the size of addresses from the CU header. */
19341 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19342 unsigned int addr_index
, gdb::optional
<ULONGEST
> addr_base
,
19345 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19346 bfd
*abfd
= objfile
->obfd
;
19347 const gdb_byte
*info_ptr
;
19348 ULONGEST addr_base_or_zero
= addr_base
.has_value () ? *addr_base
: 0;
19350 dwarf2_per_objfile
->per_bfd
->addr
.read (objfile
);
19351 if (dwarf2_per_objfile
->per_bfd
->addr
.buffer
== NULL
)
19352 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19353 objfile_name (objfile
));
19354 if (addr_base_or_zero
+ addr_index
* addr_size
19355 >= dwarf2_per_objfile
->per_bfd
->addr
.size
)
19356 error (_("DW_FORM_addr_index pointing outside of "
19357 ".debug_addr section [in module %s]"),
19358 objfile_name (objfile
));
19359 info_ptr
= (dwarf2_per_objfile
->per_bfd
->addr
.buffer
19360 + addr_base_or_zero
+ addr_index
* addr_size
);
19361 if (addr_size
== 4)
19362 return bfd_get_32 (abfd
, info_ptr
);
19364 return bfd_get_64 (abfd
, info_ptr
);
19367 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19370 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19372 return read_addr_index_1 (cu
->per_objfile
, addr_index
,
19373 cu
->addr_base
, cu
->header
.addr_size
);
19376 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19379 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19380 unsigned int *bytes_read
)
19382 bfd
*abfd
= cu
->per_objfile
->objfile
->obfd
;
19383 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19385 return read_addr_index (cu
, addr_index
);
19391 dwarf2_read_addr_index (dwarf2_per_cu_data
*per_cu
, unsigned int addr_index
)
19393 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19394 struct dwarf2_cu
*cu
= per_cu
->cu
;
19395 gdb::optional
<ULONGEST
> addr_base
;
19398 /* We need addr_base and addr_size.
19399 If we don't have PER_CU->cu, we have to get it.
19400 Nasty, but the alternative is storing the needed info in PER_CU,
19401 which at this point doesn't seem justified: it's not clear how frequently
19402 it would get used and it would increase the size of every PER_CU.
19403 Entry points like dwarf2_per_cu_addr_size do a similar thing
19404 so we're not in uncharted territory here.
19405 Alas we need to be a bit more complicated as addr_base is contained
19408 We don't need to read the entire CU(/TU).
19409 We just need the header and top level die.
19411 IWBN to use the aging mechanism to let us lazily later discard the CU.
19412 For now we skip this optimization. */
19416 addr_base
= cu
->addr_base
;
19417 addr_size
= cu
->header
.addr_size
;
19421 cutu_reader
reader (per_cu
, dwarf2_per_objfile
, NULL
, 0, false);
19422 addr_base
= reader
.cu
->addr_base
;
19423 addr_size
= reader
.cu
->header
.addr_size
;
19426 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19430 /* Given a DW_FORM_GNU_str_index value STR_INDEX, fetch the string.
19431 STR_SECTION, STR_OFFSETS_SECTION can be from a Fission stub or a
19434 static const char *
19435 read_str_index (struct dwarf2_cu
*cu
,
19436 struct dwarf2_section_info
*str_section
,
19437 struct dwarf2_section_info
*str_offsets_section
,
19438 ULONGEST str_offsets_base
, ULONGEST str_index
)
19440 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
19441 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19442 const char *objf_name
= objfile_name (objfile
);
19443 bfd
*abfd
= objfile
->obfd
;
19444 const gdb_byte
*info_ptr
;
19445 ULONGEST str_offset
;
19446 static const char form_name
[] = "DW_FORM_GNU_str_index or DW_FORM_strx";
19448 str_section
->read (objfile
);
19449 str_offsets_section
->read (objfile
);
19450 if (str_section
->buffer
== NULL
)
19451 error (_("%s used without %s section"
19452 " in CU at offset %s [in module %s]"),
19453 form_name
, str_section
->get_name (),
19454 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19455 if (str_offsets_section
->buffer
== NULL
)
19456 error (_("%s used without %s section"
19457 " in CU at offset %s [in module %s]"),
19458 form_name
, str_section
->get_name (),
19459 sect_offset_str (cu
->header
.sect_off
), objf_name
);
19460 info_ptr
= (str_offsets_section
->buffer
19462 + str_index
* cu
->header
.offset_size
);
19463 if (cu
->header
.offset_size
== 4)
19464 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19466 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19467 if (str_offset
>= str_section
->size
)
19468 error (_("Offset from %s pointing outside of"
19469 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19470 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19471 return (const char *) (str_section
->buffer
+ str_offset
);
19474 /* Given a DW_FORM_GNU_str_index from a DWO file, fetch the string. */
19476 static const char *
19477 read_dwo_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19479 ULONGEST str_offsets_base
= reader
->cu
->header
.version
>= 5
19480 ? reader
->cu
->header
.addr_size
: 0;
19481 return read_str_index (reader
->cu
,
19482 &reader
->dwo_file
->sections
.str
,
19483 &reader
->dwo_file
->sections
.str_offsets
,
19484 str_offsets_base
, str_index
);
19487 /* Given a DW_FORM_GNU_str_index from a Fission stub, fetch the string. */
19489 static const char *
19490 read_stub_str_index (struct dwarf2_cu
*cu
, ULONGEST str_index
)
19492 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
19493 const char *objf_name
= objfile_name (objfile
);
19494 static const char form_name
[] = "DW_FORM_GNU_str_index";
19495 static const char str_offsets_attr_name
[] = "DW_AT_str_offsets";
19497 if (!cu
->str_offsets_base
.has_value ())
19498 error (_("%s used in Fission stub without %s"
19499 " in CU at offset 0x%lx [in module %s]"),
19500 form_name
, str_offsets_attr_name
,
19501 (long) cu
->header
.offset_size
, objf_name
);
19503 return read_str_index (cu
,
19504 &cu
->per_objfile
->per_bfd
->str
,
19505 &cu
->per_objfile
->per_bfd
->str_offsets
,
19506 *cu
->str_offsets_base
, str_index
);
19509 /* Return the length of an LEB128 number in BUF. */
19512 leb128_size (const gdb_byte
*buf
)
19514 const gdb_byte
*begin
= buf
;
19520 if ((byte
& 128) == 0)
19521 return buf
- begin
;
19526 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19535 cu
->language
= language_c
;
19538 case DW_LANG_C_plus_plus
:
19539 case DW_LANG_C_plus_plus_11
:
19540 case DW_LANG_C_plus_plus_14
:
19541 cu
->language
= language_cplus
;
19544 cu
->language
= language_d
;
19546 case DW_LANG_Fortran77
:
19547 case DW_LANG_Fortran90
:
19548 case DW_LANG_Fortran95
:
19549 case DW_LANG_Fortran03
:
19550 case DW_LANG_Fortran08
:
19551 cu
->language
= language_fortran
;
19554 cu
->language
= language_go
;
19556 case DW_LANG_Mips_Assembler
:
19557 cu
->language
= language_asm
;
19559 case DW_LANG_Ada83
:
19560 case DW_LANG_Ada95
:
19561 cu
->language
= language_ada
;
19563 case DW_LANG_Modula2
:
19564 cu
->language
= language_m2
;
19566 case DW_LANG_Pascal83
:
19567 cu
->language
= language_pascal
;
19570 cu
->language
= language_objc
;
19573 case DW_LANG_Rust_old
:
19574 cu
->language
= language_rust
;
19576 case DW_LANG_Cobol74
:
19577 case DW_LANG_Cobol85
:
19579 cu
->language
= language_minimal
;
19582 cu
->language_defn
= language_def (cu
->language
);
19585 /* Return the named attribute or NULL if not there. */
19587 static struct attribute
*
19588 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19593 struct attribute
*spec
= NULL
;
19595 for (i
= 0; i
< die
->num_attrs
; ++i
)
19597 if (die
->attrs
[i
].name
== name
)
19598 return &die
->attrs
[i
];
19599 if (die
->attrs
[i
].name
== DW_AT_specification
19600 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19601 spec
= &die
->attrs
[i
];
19607 die
= follow_die_ref (die
, spec
, &cu
);
19613 /* Return the string associated with a string-typed attribute, or NULL if it
19614 is either not found or is of an incorrect type. */
19616 static const char *
19617 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19619 struct attribute
*attr
;
19620 const char *str
= NULL
;
19622 attr
= dwarf2_attr (die
, name
, cu
);
19626 str
= attr
->value_as_string ();
19627 if (str
== nullptr)
19628 complaint (_("string type expected for attribute %s for "
19629 "DIE at %s in module %s"),
19630 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
19631 objfile_name (cu
->per_objfile
->objfile
));
19637 /* Return the dwo name or NULL if not present. If present, it is in either
19638 DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */
19639 static const char *
19640 dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
19642 const char *dwo_name
= dwarf2_string_attr (die
, DW_AT_GNU_dwo_name
, cu
);
19643 if (dwo_name
== nullptr)
19644 dwo_name
= dwarf2_string_attr (die
, DW_AT_dwo_name
, cu
);
19648 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19649 and holds a non-zero value. This function should only be used for
19650 DW_FORM_flag or DW_FORM_flag_present attributes. */
19653 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19655 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19657 return (attr
&& DW_UNSND (attr
));
19661 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19663 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19664 which value is non-zero. However, we have to be careful with
19665 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19666 (via dwarf2_flag_true_p) follows this attribute. So we may
19667 end up accidently finding a declaration attribute that belongs
19668 to a different DIE referenced by the specification attribute,
19669 even though the given DIE does not have a declaration attribute. */
19670 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19671 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19674 /* Return the die giving the specification for DIE, if there is
19675 one. *SPEC_CU is the CU containing DIE on input, and the CU
19676 containing the return value on output. If there is no
19677 specification, but there is an abstract origin, that is
19680 static struct die_info
*
19681 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19683 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19686 if (spec_attr
== NULL
)
19687 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19689 if (spec_attr
== NULL
)
19692 return follow_die_ref (die
, spec_attr
, spec_cu
);
19695 /* Stub for free_line_header to match void * callback types. */
19698 free_line_header_voidp (void *arg
)
19700 struct line_header
*lh
= (struct line_header
*) arg
;
19705 /* A convenience function to find the proper .debug_line section for a CU. */
19707 static struct dwarf2_section_info
*
19708 get_debug_line_section (struct dwarf2_cu
*cu
)
19710 struct dwarf2_section_info
*section
;
19711 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
19713 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
19715 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19716 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
19717 else if (cu
->per_cu
->is_dwz
)
19719 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
->per_bfd
);
19721 section
= &dwz
->line
;
19724 section
= &dwarf2_per_objfile
->per_bfd
->line
;
19729 /* Read the statement program header starting at OFFSET in
19730 .debug_line, or .debug_line.dwo. Return a pointer
19731 to a struct line_header, allocated using xmalloc.
19732 Returns NULL if there is a problem reading the header, e.g., if it
19733 has a version we don't understand.
19735 NOTE: the strings in the include directory and file name tables of
19736 the returned object point into the dwarf line section buffer,
19737 and must not be freed. */
19739 static line_header_up
19740 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
19742 struct dwarf2_section_info
*section
;
19743 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
19745 section
= get_debug_line_section (cu
);
19746 section
->read (dwarf2_per_objfile
->objfile
);
19747 if (section
->buffer
== NULL
)
19749 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19750 complaint (_("missing .debug_line.dwo section"));
19752 complaint (_("missing .debug_line section"));
19756 return dwarf_decode_line_header (sect_off
, cu
->per_cu
->is_dwz
,
19757 dwarf2_per_objfile
, section
,
19761 /* Subroutine of dwarf_decode_lines to simplify it.
19762 Return the file name of the psymtab for the given file_entry.
19763 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
19764 If space for the result is malloc'd, *NAME_HOLDER will be set.
19765 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
19767 static const char *
19768 psymtab_include_file_name (const struct line_header
*lh
, const file_entry
&fe
,
19769 const dwarf2_psymtab
*pst
,
19770 const char *comp_dir
,
19771 gdb::unique_xmalloc_ptr
<char> *name_holder
)
19773 const char *include_name
= fe
.name
;
19774 const char *include_name_to_compare
= include_name
;
19775 const char *pst_filename
;
19778 const char *dir_name
= fe
.include_dir (lh
);
19780 gdb::unique_xmalloc_ptr
<char> hold_compare
;
19781 if (!IS_ABSOLUTE_PATH (include_name
)
19782 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
19784 /* Avoid creating a duplicate psymtab for PST.
19785 We do this by comparing INCLUDE_NAME and PST_FILENAME.
19786 Before we do the comparison, however, we need to account
19787 for DIR_NAME and COMP_DIR.
19788 First prepend dir_name (if non-NULL). If we still don't
19789 have an absolute path prepend comp_dir (if non-NULL).
19790 However, the directory we record in the include-file's
19791 psymtab does not contain COMP_DIR (to match the
19792 corresponding symtab(s)).
19797 bash$ gcc -g ./hello.c
19798 include_name = "hello.c"
19800 DW_AT_comp_dir = comp_dir = "/tmp"
19801 DW_AT_name = "./hello.c"
19805 if (dir_name
!= NULL
)
19807 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
19808 include_name
, (char *) NULL
));
19809 include_name
= name_holder
->get ();
19810 include_name_to_compare
= include_name
;
19812 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
19814 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
19815 include_name
, (char *) NULL
));
19816 include_name_to_compare
= hold_compare
.get ();
19820 pst_filename
= pst
->filename
;
19821 gdb::unique_xmalloc_ptr
<char> copied_name
;
19822 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
19824 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
19825 pst_filename
, (char *) NULL
));
19826 pst_filename
= copied_name
.get ();
19829 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
19833 return include_name
;
19836 /* State machine to track the state of the line number program. */
19838 class lnp_state_machine
19841 /* Initialize a machine state for the start of a line number
19843 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
19844 bool record_lines_p
);
19846 file_entry
*current_file ()
19848 /* lh->file_names is 0-based, but the file name numbers in the
19849 statement program are 1-based. */
19850 return m_line_header
->file_name_at (m_file
);
19853 /* Record the line in the state machine. END_SEQUENCE is true if
19854 we're processing the end of a sequence. */
19855 void record_line (bool end_sequence
);
19857 /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true
19858 nop-out rest of the lines in this sequence. */
19859 void check_line_address (struct dwarf2_cu
*cu
,
19860 const gdb_byte
*line_ptr
,
19861 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
19863 void handle_set_discriminator (unsigned int discriminator
)
19865 m_discriminator
= discriminator
;
19866 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
19869 /* Handle DW_LNE_set_address. */
19870 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
19873 address
+= baseaddr
;
19874 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
19877 /* Handle DW_LNS_advance_pc. */
19878 void handle_advance_pc (CORE_ADDR adjust
);
19880 /* Handle a special opcode. */
19881 void handle_special_opcode (unsigned char op_code
);
19883 /* Handle DW_LNS_advance_line. */
19884 void handle_advance_line (int line_delta
)
19886 advance_line (line_delta
);
19889 /* Handle DW_LNS_set_file. */
19890 void handle_set_file (file_name_index file
);
19892 /* Handle DW_LNS_negate_stmt. */
19893 void handle_negate_stmt ()
19895 m_is_stmt
= !m_is_stmt
;
19898 /* Handle DW_LNS_const_add_pc. */
19899 void handle_const_add_pc ();
19901 /* Handle DW_LNS_fixed_advance_pc. */
19902 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
19904 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19908 /* Handle DW_LNS_copy. */
19909 void handle_copy ()
19911 record_line (false);
19912 m_discriminator
= 0;
19915 /* Handle DW_LNE_end_sequence. */
19916 void handle_end_sequence ()
19918 m_currently_recording_lines
= true;
19922 /* Advance the line by LINE_DELTA. */
19923 void advance_line (int line_delta
)
19925 m_line
+= line_delta
;
19927 if (line_delta
!= 0)
19928 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
19931 struct dwarf2_cu
*m_cu
;
19933 gdbarch
*m_gdbarch
;
19935 /* True if we're recording lines.
19936 Otherwise we're building partial symtabs and are just interested in
19937 finding include files mentioned by the line number program. */
19938 bool m_record_lines_p
;
19940 /* The line number header. */
19941 line_header
*m_line_header
;
19943 /* These are part of the standard DWARF line number state machine,
19944 and initialized according to the DWARF spec. */
19946 unsigned char m_op_index
= 0;
19947 /* The line table index of the current file. */
19948 file_name_index m_file
= 1;
19949 unsigned int m_line
= 1;
19951 /* These are initialized in the constructor. */
19953 CORE_ADDR m_address
;
19955 unsigned int m_discriminator
;
19957 /* Additional bits of state we need to track. */
19959 /* The last file that we called dwarf2_start_subfile for.
19960 This is only used for TLLs. */
19961 unsigned int m_last_file
= 0;
19962 /* The last file a line number was recorded for. */
19963 struct subfile
*m_last_subfile
= NULL
;
19965 /* When true, record the lines we decode. */
19966 bool m_currently_recording_lines
= false;
19968 /* The last line number that was recorded, used to coalesce
19969 consecutive entries for the same line. This can happen, for
19970 example, when discriminators are present. PR 17276. */
19971 unsigned int m_last_line
= 0;
19972 bool m_line_has_non_zero_discriminator
= false;
19976 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
19978 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
19979 / m_line_header
->maximum_ops_per_instruction
)
19980 * m_line_header
->minimum_instruction_length
);
19981 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19982 m_op_index
= ((m_op_index
+ adjust
)
19983 % m_line_header
->maximum_ops_per_instruction
);
19987 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
19989 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
19990 unsigned char adj_opcode_d
= adj_opcode
/ m_line_header
->line_range
;
19991 unsigned char adj_opcode_r
= adj_opcode
% m_line_header
->line_range
;
19992 CORE_ADDR addr_adj
= (((m_op_index
+ adj_opcode_d
)
19993 / m_line_header
->maximum_ops_per_instruction
)
19994 * m_line_header
->minimum_instruction_length
);
19995 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
19996 m_op_index
= ((m_op_index
+ adj_opcode_d
)
19997 % m_line_header
->maximum_ops_per_instruction
);
19999 int line_delta
= m_line_header
->line_base
+ adj_opcode_r
;
20000 advance_line (line_delta
);
20001 record_line (false);
20002 m_discriminator
= 0;
20006 lnp_state_machine::handle_set_file (file_name_index file
)
20010 const file_entry
*fe
= current_file ();
20012 dwarf2_debug_line_missing_file_complaint ();
20013 else if (m_record_lines_p
)
20015 const char *dir
= fe
->include_dir (m_line_header
);
20017 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20018 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20019 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
20024 lnp_state_machine::handle_const_add_pc ()
20027 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
20030 = (((m_op_index
+ adjust
)
20031 / m_line_header
->maximum_ops_per_instruction
)
20032 * m_line_header
->minimum_instruction_length
);
20034 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20035 m_op_index
= ((m_op_index
+ adjust
)
20036 % m_line_header
->maximum_ops_per_instruction
);
20039 /* Return non-zero if we should add LINE to the line number table.
20040 LINE is the line to add, LAST_LINE is the last line that was added,
20041 LAST_SUBFILE is the subfile for LAST_LINE.
20042 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
20043 had a non-zero discriminator.
20045 We have to be careful in the presence of discriminators.
20046 E.g., for this line:
20048 for (i = 0; i < 100000; i++);
20050 clang can emit four line number entries for that one line,
20051 each with a different discriminator.
20052 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20054 However, we want gdb to coalesce all four entries into one.
20055 Otherwise the user could stepi into the middle of the line and
20056 gdb would get confused about whether the pc really was in the
20057 middle of the line.
20059 Things are further complicated by the fact that two consecutive
20060 line number entries for the same line is a heuristic used by gcc
20061 to denote the end of the prologue. So we can't just discard duplicate
20062 entries, we have to be selective about it. The heuristic we use is
20063 that we only collapse consecutive entries for the same line if at least
20064 one of those entries has a non-zero discriminator. PR 17276.
20066 Note: Addresses in the line number state machine can never go backwards
20067 within one sequence, thus this coalescing is ok. */
20070 dwarf_record_line_p (struct dwarf2_cu
*cu
,
20071 unsigned int line
, unsigned int last_line
,
20072 int line_has_non_zero_discriminator
,
20073 struct subfile
*last_subfile
)
20075 if (cu
->get_builder ()->get_current_subfile () != last_subfile
)
20077 if (line
!= last_line
)
20079 /* Same line for the same file that we've seen already.
20080 As a last check, for pr 17276, only record the line if the line
20081 has never had a non-zero discriminator. */
20082 if (!line_has_non_zero_discriminator
)
20087 /* Use the CU's builder to record line number LINE beginning at
20088 address ADDRESS in the line table of subfile SUBFILE. */
20091 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20092 unsigned int line
, CORE_ADDR address
, bool is_stmt
,
20093 struct dwarf2_cu
*cu
)
20095 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20097 if (dwarf_line_debug
)
20099 fprintf_unfiltered (gdb_stdlog
,
20100 "Recording line %u, file %s, address %s\n",
20101 line
, lbasename (subfile
->name
),
20102 paddress (gdbarch
, address
));
20106 cu
->get_builder ()->record_line (subfile
, line
, addr
, is_stmt
);
20109 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20110 Mark the end of a set of line number records.
20111 The arguments are the same as for dwarf_record_line_1.
20112 If SUBFILE is NULL the request is ignored. */
20115 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20116 CORE_ADDR address
, struct dwarf2_cu
*cu
)
20118 if (subfile
== NULL
)
20121 if (dwarf_line_debug
)
20123 fprintf_unfiltered (gdb_stdlog
,
20124 "Finishing current line, file %s, address %s\n",
20125 lbasename (subfile
->name
),
20126 paddress (gdbarch
, address
));
20129 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, true, cu
);
20133 lnp_state_machine::record_line (bool end_sequence
)
20135 if (dwarf_line_debug
)
20137 fprintf_unfiltered (gdb_stdlog
,
20138 "Processing actual line %u: file %u,"
20139 " address %s, is_stmt %u, discrim %u%s\n",
20141 paddress (m_gdbarch
, m_address
),
20142 m_is_stmt
, m_discriminator
,
20143 (end_sequence
? "\t(end sequence)" : ""));
20146 file_entry
*fe
= current_file ();
20149 dwarf2_debug_line_missing_file_complaint ();
20150 /* For now we ignore lines not starting on an instruction boundary.
20151 But not when processing end_sequence for compatibility with the
20152 previous version of the code. */
20153 else if (m_op_index
== 0 || end_sequence
)
20155 fe
->included_p
= 1;
20156 if (m_record_lines_p
)
20158 if (m_last_subfile
!= m_cu
->get_builder ()->get_current_subfile ()
20161 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
20162 m_currently_recording_lines
? m_cu
: nullptr);
20167 bool is_stmt
= producer_is_codewarrior (m_cu
) || m_is_stmt
;
20169 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
20170 m_line_has_non_zero_discriminator
,
20173 buildsym_compunit
*builder
= m_cu
->get_builder ();
20174 dwarf_record_line_1 (m_gdbarch
,
20175 builder
->get_current_subfile (),
20176 m_line
, m_address
, is_stmt
,
20177 m_currently_recording_lines
? m_cu
: nullptr);
20179 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20180 m_last_line
= m_line
;
20186 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
20187 line_header
*lh
, bool record_lines_p
)
20191 m_record_lines_p
= record_lines_p
;
20192 m_line_header
= lh
;
20194 m_currently_recording_lines
= true;
20196 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20197 was a line entry for it so that the backend has a chance to adjust it
20198 and also record it in case it needs it. This is currently used by MIPS
20199 code, cf. `mips_adjust_dwarf2_line'. */
20200 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20201 m_is_stmt
= lh
->default_is_stmt
;
20202 m_discriminator
= 0;
20206 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20207 const gdb_byte
*line_ptr
,
20208 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
20210 /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside
20211 the pc range of the CU. However, we restrict the test to only ADDRESS
20212 values of zero to preserve GDB's previous behaviour which is to handle
20213 the specific case of a function being GC'd by the linker. */
20215 if (address
== 0 && address
< unrelocated_lowpc
)
20217 /* This line table is for a function which has been
20218 GCd by the linker. Ignore it. PR gdb/12528 */
20220 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
20221 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20223 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20224 line_offset
, objfile_name (objfile
));
20225 m_currently_recording_lines
= false;
20226 /* Note: m_currently_recording_lines is left as false until we see
20227 DW_LNE_end_sequence. */
20231 /* Subroutine of dwarf_decode_lines to simplify it.
20232 Process the line number information in LH.
20233 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20234 program in order to set included_p for every referenced header. */
20237 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20238 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20240 const gdb_byte
*line_ptr
, *extended_end
;
20241 const gdb_byte
*line_end
;
20242 unsigned int bytes_read
, extended_len
;
20243 unsigned char op_code
, extended_op
;
20244 CORE_ADDR baseaddr
;
20245 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
20246 bfd
*abfd
= objfile
->obfd
;
20247 struct gdbarch
*gdbarch
= objfile
->arch ();
20248 /* True if we're recording line info (as opposed to building partial
20249 symtabs and just interested in finding include files mentioned by
20250 the line number program). */
20251 bool record_lines_p
= !decode_for_pst_p
;
20253 baseaddr
= objfile
->text_section_offset ();
20255 line_ptr
= lh
->statement_program_start
;
20256 line_end
= lh
->statement_program_end
;
20258 /* Read the statement sequences until there's nothing left. */
20259 while (line_ptr
< line_end
)
20261 /* The DWARF line number program state machine. Reset the state
20262 machine at the start of each sequence. */
20263 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
20264 bool end_sequence
= false;
20266 if (record_lines_p
)
20268 /* Start a subfile for the current file of the state
20270 const file_entry
*fe
= state_machine
.current_file ();
20273 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
20276 /* Decode the table. */
20277 while (line_ptr
< line_end
&& !end_sequence
)
20279 op_code
= read_1_byte (abfd
, line_ptr
);
20282 if (op_code
>= lh
->opcode_base
)
20284 /* Special opcode. */
20285 state_machine
.handle_special_opcode (op_code
);
20287 else switch (op_code
)
20289 case DW_LNS_extended_op
:
20290 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
20292 line_ptr
+= bytes_read
;
20293 extended_end
= line_ptr
+ extended_len
;
20294 extended_op
= read_1_byte (abfd
, line_ptr
);
20296 switch (extended_op
)
20298 case DW_LNE_end_sequence
:
20299 state_machine
.handle_end_sequence ();
20300 end_sequence
= true;
20302 case DW_LNE_set_address
:
20305 = cu
->header
.read_address (abfd
, line_ptr
, &bytes_read
);
20306 line_ptr
+= bytes_read
;
20308 state_machine
.check_line_address (cu
, line_ptr
,
20309 lowpc
- baseaddr
, address
);
20310 state_machine
.handle_set_address (baseaddr
, address
);
20313 case DW_LNE_define_file
:
20315 const char *cur_file
;
20316 unsigned int mod_time
, length
;
20319 cur_file
= read_direct_string (abfd
, line_ptr
,
20321 line_ptr
+= bytes_read
;
20322 dindex
= (dir_index
)
20323 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20324 line_ptr
+= bytes_read
;
20326 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20327 line_ptr
+= bytes_read
;
20329 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20330 line_ptr
+= bytes_read
;
20331 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
20334 case DW_LNE_set_discriminator
:
20336 /* The discriminator is not interesting to the
20337 debugger; just ignore it. We still need to
20338 check its value though:
20339 if there are consecutive entries for the same
20340 (non-prologue) line we want to coalesce them.
20343 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20344 line_ptr
+= bytes_read
;
20346 state_machine
.handle_set_discriminator (discr
);
20350 complaint (_("mangled .debug_line section"));
20353 /* Make sure that we parsed the extended op correctly. If e.g.
20354 we expected a different address size than the producer used,
20355 we may have read the wrong number of bytes. */
20356 if (line_ptr
!= extended_end
)
20358 complaint (_("mangled .debug_line section"));
20363 state_machine
.handle_copy ();
20365 case DW_LNS_advance_pc
:
20368 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20369 line_ptr
+= bytes_read
;
20371 state_machine
.handle_advance_pc (adjust
);
20374 case DW_LNS_advance_line
:
20377 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
20378 line_ptr
+= bytes_read
;
20380 state_machine
.handle_advance_line (line_delta
);
20383 case DW_LNS_set_file
:
20385 file_name_index file
20386 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
20388 line_ptr
+= bytes_read
;
20390 state_machine
.handle_set_file (file
);
20393 case DW_LNS_set_column
:
20394 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20395 line_ptr
+= bytes_read
;
20397 case DW_LNS_negate_stmt
:
20398 state_machine
.handle_negate_stmt ();
20400 case DW_LNS_set_basic_block
:
20402 /* Add to the address register of the state machine the
20403 address increment value corresponding to special opcode
20404 255. I.e., this value is scaled by the minimum
20405 instruction length since special opcode 255 would have
20406 scaled the increment. */
20407 case DW_LNS_const_add_pc
:
20408 state_machine
.handle_const_add_pc ();
20410 case DW_LNS_fixed_advance_pc
:
20412 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
20415 state_machine
.handle_fixed_advance_pc (addr_adj
);
20420 /* Unknown standard opcode, ignore it. */
20423 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
20425 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20426 line_ptr
+= bytes_read
;
20433 dwarf2_debug_line_missing_end_sequence_complaint ();
20435 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
20436 in which case we still finish recording the last line). */
20437 state_machine
.record_line (true);
20441 /* Decode the Line Number Program (LNP) for the given line_header
20442 structure and CU. The actual information extracted and the type
20443 of structures created from the LNP depends on the value of PST.
20445 1. If PST is NULL, then this procedure uses the data from the program
20446 to create all necessary symbol tables, and their linetables.
20448 2. If PST is not NULL, this procedure reads the program to determine
20449 the list of files included by the unit represented by PST, and
20450 builds all the associated partial symbol tables.
20452 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20453 It is used for relative paths in the line table.
20454 NOTE: When processing partial symtabs (pst != NULL),
20455 comp_dir == pst->dirname.
20457 NOTE: It is important that psymtabs have the same file name (via strcmp)
20458 as the corresponding symtab. Since COMP_DIR is not used in the name of the
20459 symtab we don't use it in the name of the psymtabs we create.
20460 E.g. expand_line_sal requires this when finding psymtabs to expand.
20461 A good testcase for this is mb-inline.exp.
20463 LOWPC is the lowest address in CU (or 0 if not known).
20465 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
20466 for its PC<->lines mapping information. Otherwise only the filename
20467 table is read in. */
20470 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
20471 struct dwarf2_cu
*cu
, dwarf2_psymtab
*pst
,
20472 CORE_ADDR lowpc
, int decode_mapping
)
20474 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
20475 const int decode_for_pst_p
= (pst
!= NULL
);
20477 if (decode_mapping
)
20478 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
20480 if (decode_for_pst_p
)
20482 /* Now that we're done scanning the Line Header Program, we can
20483 create the psymtab of each included file. */
20484 for (auto &file_entry
: lh
->file_names ())
20485 if (file_entry
.included_p
== 1)
20487 gdb::unique_xmalloc_ptr
<char> name_holder
;
20488 const char *include_name
=
20489 psymtab_include_file_name (lh
, file_entry
, pst
,
20490 comp_dir
, &name_holder
);
20491 if (include_name
!= NULL
)
20492 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
20497 /* Make sure a symtab is created for every file, even files
20498 which contain only variables (i.e. no code with associated
20500 buildsym_compunit
*builder
= cu
->get_builder ();
20501 struct compunit_symtab
*cust
= builder
->get_compunit_symtab ();
20503 for (auto &fe
: lh
->file_names ())
20505 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
20506 if (builder
->get_current_subfile ()->symtab
== NULL
)
20508 builder
->get_current_subfile ()->symtab
20509 = allocate_symtab (cust
,
20510 builder
->get_current_subfile ()->name
);
20512 fe
.symtab
= builder
->get_current_subfile ()->symtab
;
20517 /* Start a subfile for DWARF. FILENAME is the name of the file and
20518 DIRNAME the name of the source directory which contains FILENAME
20519 or NULL if not known.
20520 This routine tries to keep line numbers from identical absolute and
20521 relative file names in a common subfile.
20523 Using the `list' example from the GDB testsuite, which resides in
20524 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
20525 of /srcdir/list0.c yields the following debugging information for list0.c:
20527 DW_AT_name: /srcdir/list0.c
20528 DW_AT_comp_dir: /compdir
20529 files.files[0].name: list0.h
20530 files.files[0].dir: /srcdir
20531 files.files[1].name: list0.c
20532 files.files[1].dir: /srcdir
20534 The line number information for list0.c has to end up in a single
20535 subfile, so that `break /srcdir/list0.c:1' works as expected.
20536 start_subfile will ensure that this happens provided that we pass the
20537 concatenation of files.files[1].dir and files.files[1].name as the
20541 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
20542 const char *dirname
)
20544 gdb::unique_xmalloc_ptr
<char> copy
;
20546 /* In order not to lose the line information directory,
20547 we concatenate it to the filename when it makes sense.
20548 Note that the Dwarf3 standard says (speaking of filenames in line
20549 information): ``The directory index is ignored for file names
20550 that represent full path names''. Thus ignoring dirname in the
20551 `else' branch below isn't an issue. */
20553 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
20555 copy
.reset (concat (dirname
, SLASH_STRING
, filename
, (char *) NULL
));
20556 filename
= copy
.get ();
20559 cu
->get_builder ()->start_subfile (filename
);
20562 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
20563 buildsym_compunit constructor. */
20565 struct compunit_symtab
*
20566 dwarf2_cu::start_symtab (const char *name
, const char *comp_dir
,
20569 gdb_assert (m_builder
== nullptr);
20571 m_builder
.reset (new struct buildsym_compunit
20572 (per_cu
->dwarf2_per_objfile
->objfile
,
20573 name
, comp_dir
, language
, low_pc
));
20575 list_in_scope
= get_builder ()->get_file_symbols ();
20577 get_builder ()->record_debugformat ("DWARF 2");
20578 get_builder ()->record_producer (producer
);
20580 processing_has_namespace_info
= false;
20582 return get_builder ()->get_compunit_symtab ();
20586 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
20587 struct dwarf2_cu
*cu
)
20589 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
20590 struct comp_unit_head
*cu_header
= &cu
->header
;
20592 /* NOTE drow/2003-01-30: There used to be a comment and some special
20593 code here to turn a symbol with DW_AT_external and a
20594 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
20595 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
20596 with some versions of binutils) where shared libraries could have
20597 relocations against symbols in their debug information - the
20598 minimal symbol would have the right address, but the debug info
20599 would not. It's no longer necessary, because we will explicitly
20600 apply relocations when we read in the debug information now. */
20602 /* A DW_AT_location attribute with no contents indicates that a
20603 variable has been optimized away. */
20604 if (attr
->form_is_block () && DW_BLOCK (attr
)->size
== 0)
20606 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
20610 /* Handle one degenerate form of location expression specially, to
20611 preserve GDB's previous behavior when section offsets are
20612 specified. If this is just a DW_OP_addr, DW_OP_addrx, or
20613 DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */
20615 if (attr
->form_is_block ()
20616 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
20617 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
20618 || ((DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
20619 || DW_BLOCK (attr
)->data
[0] == DW_OP_addrx
)
20620 && (DW_BLOCK (attr
)->size
20621 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
20623 unsigned int dummy
;
20625 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
20626 SET_SYMBOL_VALUE_ADDRESS
20627 (sym
, cu
->header
.read_address (objfile
->obfd
,
20628 DW_BLOCK (attr
)->data
+ 1,
20631 SET_SYMBOL_VALUE_ADDRESS
20632 (sym
, read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1,
20634 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
20635 fixup_symbol_section (sym
, objfile
);
20636 SET_SYMBOL_VALUE_ADDRESS
20638 SYMBOL_VALUE_ADDRESS (sym
)
20639 + objfile
->section_offsets
[SYMBOL_SECTION (sym
)]);
20643 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
20644 expression evaluator, and use LOC_COMPUTED only when necessary
20645 (i.e. when the value of a register or memory location is
20646 referenced, or a thread-local block, etc.). Then again, it might
20647 not be worthwhile. I'm assuming that it isn't unless performance
20648 or memory numbers show me otherwise. */
20650 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
20652 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
20653 cu
->has_loclist
= true;
20656 /* Given a pointer to a DWARF information entry, figure out if we need
20657 to make a symbol table entry for it, and if so, create a new entry
20658 and return a pointer to it.
20659 If TYPE is NULL, determine symbol type from the die, otherwise
20660 used the passed type.
20661 If SPACE is not NULL, use it to hold the new symbol. If it is
20662 NULL, allocate a new symbol on the objfile's obstack. */
20664 static struct symbol
*
20665 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
20666 struct symbol
*space
)
20668 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
20669 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
20670 struct gdbarch
*gdbarch
= objfile
->arch ();
20671 struct symbol
*sym
= NULL
;
20673 struct attribute
*attr
= NULL
;
20674 struct attribute
*attr2
= NULL
;
20675 CORE_ADDR baseaddr
;
20676 struct pending
**list_to_add
= NULL
;
20678 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
20680 baseaddr
= objfile
->text_section_offset ();
20682 name
= dwarf2_name (die
, cu
);
20685 int suppress_add
= 0;
20690 sym
= new (&objfile
->objfile_obstack
) symbol
;
20691 OBJSTAT (objfile
, n_syms
++);
20693 /* Cache this symbol's name and the name's demangled form (if any). */
20694 sym
->set_language (cu
->language
, &objfile
->objfile_obstack
);
20695 /* Fortran does not have mangling standard and the mangling does differ
20696 between gfortran, iFort etc. */
20697 const char *physname
20698 = (cu
->language
== language_fortran
20699 ? dwarf2_full_name (name
, die
, cu
)
20700 : dwarf2_physname (name
, die
, cu
));
20701 const char *linkagename
= dw2_linkage_name (die
, cu
);
20703 if (linkagename
== nullptr || cu
->language
== language_ada
)
20704 sym
->set_linkage_name (physname
);
20707 sym
->set_demangled_name (physname
, &objfile
->objfile_obstack
);
20708 sym
->set_linkage_name (linkagename
);
20711 /* Default assumptions.
20712 Use the passed type or decode it from the die. */
20713 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20714 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
20716 SYMBOL_TYPE (sym
) = type
;
20718 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
20719 attr
= dwarf2_attr (die
,
20720 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
20722 if (attr
!= nullptr)
20724 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
20727 attr
= dwarf2_attr (die
,
20728 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
20730 if (attr
!= nullptr)
20732 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
20733 struct file_entry
*fe
;
20735 if (cu
->line_header
!= NULL
)
20736 fe
= cu
->line_header
->file_name_at (file_index
);
20741 complaint (_("file index out of range"));
20743 symbol_set_symtab (sym
, fe
->symtab
);
20749 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
20750 if (attr
!= nullptr)
20754 addr
= attr
->value_as_address ();
20755 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
20756 SET_SYMBOL_VALUE_ADDRESS (sym
, addr
);
20758 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
20759 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
20760 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
20761 add_symbol_to_list (sym
, cu
->list_in_scope
);
20763 case DW_TAG_subprogram
:
20764 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20766 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20767 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20768 if ((attr2
&& (DW_UNSND (attr2
) != 0))
20769 || cu
->language
== language_ada
20770 || cu
->language
== language_fortran
)
20772 /* Subprograms marked external are stored as a global symbol.
20773 Ada and Fortran subprograms, whether marked external or
20774 not, are always stored as a global symbol, because we want
20775 to be able to access them globally. For instance, we want
20776 to be able to break on a nested subprogram without having
20777 to specify the context. */
20778 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20782 list_to_add
= cu
->list_in_scope
;
20785 case DW_TAG_inlined_subroutine
:
20786 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
20788 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
20789 SYMBOL_INLINED (sym
) = 1;
20790 list_to_add
= cu
->list_in_scope
;
20792 case DW_TAG_template_value_param
:
20794 /* Fall through. */
20795 case DW_TAG_constant
:
20796 case DW_TAG_variable
:
20797 case DW_TAG_member
:
20798 /* Compilation with minimal debug info may result in
20799 variables with missing type entries. Change the
20800 misleading `void' type to something sensible. */
20801 if (SYMBOL_TYPE (sym
)->code () == TYPE_CODE_VOID
)
20802 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
20804 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20805 /* In the case of DW_TAG_member, we should only be called for
20806 static const members. */
20807 if (die
->tag
== DW_TAG_member
)
20809 /* dwarf2_add_field uses die_is_declaration,
20810 so we do the same. */
20811 gdb_assert (die_is_declaration (die
, cu
));
20814 if (attr
!= nullptr)
20816 dwarf2_const_value (attr
, sym
, cu
);
20817 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20820 if (attr2
&& (DW_UNSND (attr2
) != 0))
20821 list_to_add
= cu
->get_builder ()->get_global_symbols ();
20823 list_to_add
= cu
->list_in_scope
;
20827 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20828 if (attr
!= nullptr)
20830 var_decode_location (attr
, sym
, cu
);
20831 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20833 /* Fortran explicitly imports any global symbols to the local
20834 scope by DW_TAG_common_block. */
20835 if (cu
->language
== language_fortran
&& die
->parent
20836 && die
->parent
->tag
== DW_TAG_common_block
)
20839 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20840 && SYMBOL_VALUE_ADDRESS (sym
) == 0
20841 && !dwarf2_per_objfile
->per_bfd
->has_section_at_zero
)
20843 /* When a static variable is eliminated by the linker,
20844 the corresponding debug information is not stripped
20845 out, but the variable address is set to null;
20846 do not add such variables into symbol table. */
20848 else if (attr2
&& (DW_UNSND (attr2
) != 0))
20850 if (SYMBOL_CLASS (sym
) == LOC_STATIC
20851 && (objfile
->flags
& OBJF_MAINLINE
) == 0
20852 && dwarf2_per_objfile
->per_bfd
->can_copy
)
20854 /* A global static variable might be subject to
20855 copy relocation. We first check for a local
20856 minsym, though, because maybe the symbol was
20857 marked hidden, in which case this would not
20859 bound_minimal_symbol found
20860 = (lookup_minimal_symbol_linkage
20861 (sym
->linkage_name (), objfile
));
20862 if (found
.minsym
!= nullptr)
20863 sym
->maybe_copied
= 1;
20866 /* A variable with DW_AT_external is never static,
20867 but it may be block-scoped. */
20869 = ((cu
->list_in_scope
20870 == cu
->get_builder ()->get_file_symbols ())
20871 ? cu
->get_builder ()->get_global_symbols ()
20872 : cu
->list_in_scope
);
20875 list_to_add
= cu
->list_in_scope
;
20879 /* We do not know the address of this symbol.
20880 If it is an external symbol and we have type information
20881 for it, enter the symbol as a LOC_UNRESOLVED symbol.
20882 The address of the variable will then be determined from
20883 the minimal symbol table whenever the variable is
20885 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
20887 /* Fortran explicitly imports any global symbols to the local
20888 scope by DW_TAG_common_block. */
20889 if (cu
->language
== language_fortran
&& die
->parent
20890 && die
->parent
->tag
== DW_TAG_common_block
)
20892 /* SYMBOL_CLASS doesn't matter here because
20893 read_common_block is going to reset it. */
20895 list_to_add
= cu
->list_in_scope
;
20897 else if (attr2
&& (DW_UNSND (attr2
) != 0)
20898 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
20900 /* A variable with DW_AT_external is never static, but it
20901 may be block-scoped. */
20903 = ((cu
->list_in_scope
20904 == cu
->get_builder ()->get_file_symbols ())
20905 ? cu
->get_builder ()->get_global_symbols ()
20906 : cu
->list_in_scope
);
20908 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
20910 else if (!die_is_declaration (die
, cu
))
20912 /* Use the default LOC_OPTIMIZED_OUT class. */
20913 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
20915 list_to_add
= cu
->list_in_scope
;
20919 case DW_TAG_formal_parameter
:
20921 /* If we are inside a function, mark this as an argument. If
20922 not, we might be looking at an argument to an inlined function
20923 when we do not have enough information to show inlined frames;
20924 pretend it's a local variable in that case so that the user can
20926 struct context_stack
*curr
20927 = cu
->get_builder ()->get_current_context_stack ();
20928 if (curr
!= nullptr && curr
->name
!= nullptr)
20929 SYMBOL_IS_ARGUMENT (sym
) = 1;
20930 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
20931 if (attr
!= nullptr)
20933 var_decode_location (attr
, sym
, cu
);
20935 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
20936 if (attr
!= nullptr)
20938 dwarf2_const_value (attr
, sym
, cu
);
20941 list_to_add
= cu
->list_in_scope
;
20944 case DW_TAG_unspecified_parameters
:
20945 /* From varargs functions; gdb doesn't seem to have any
20946 interest in this information, so just ignore it for now.
20949 case DW_TAG_template_type_param
:
20951 /* Fall through. */
20952 case DW_TAG_class_type
:
20953 case DW_TAG_interface_type
:
20954 case DW_TAG_structure_type
:
20955 case DW_TAG_union_type
:
20956 case DW_TAG_set_type
:
20957 case DW_TAG_enumeration_type
:
20958 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20959 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
20962 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
20963 really ever be static objects: otherwise, if you try
20964 to, say, break of a class's method and you're in a file
20965 which doesn't mention that class, it won't work unless
20966 the check for all static symbols in lookup_symbol_aux
20967 saves you. See the OtherFileClass tests in
20968 gdb.c++/namespace.exp. */
20972 buildsym_compunit
*builder
= cu
->get_builder ();
20974 = (cu
->list_in_scope
== builder
->get_file_symbols ()
20975 && cu
->language
== language_cplus
20976 ? builder
->get_global_symbols ()
20977 : cu
->list_in_scope
);
20979 /* The semantics of C++ state that "struct foo {
20980 ... }" also defines a typedef for "foo". */
20981 if (cu
->language
== language_cplus
20982 || cu
->language
== language_ada
20983 || cu
->language
== language_d
20984 || cu
->language
== language_rust
)
20986 /* The symbol's name is already allocated along
20987 with this objfile, so we don't need to
20988 duplicate it for the type. */
20989 if (SYMBOL_TYPE (sym
)->name () == 0)
20990 SYMBOL_TYPE (sym
)->set_name (sym
->search_name ());
20995 case DW_TAG_typedef
:
20996 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
20997 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
20998 list_to_add
= cu
->list_in_scope
;
21000 case DW_TAG_base_type
:
21001 case DW_TAG_subrange_type
:
21002 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21003 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21004 list_to_add
= cu
->list_in_scope
;
21006 case DW_TAG_enumerator
:
21007 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21008 if (attr
!= nullptr)
21010 dwarf2_const_value (attr
, sym
, cu
);
21013 /* NOTE: carlton/2003-11-10: See comment above in the
21014 DW_TAG_class_type, etc. block. */
21017 = (cu
->list_in_scope
== cu
->get_builder ()->get_file_symbols ()
21018 && cu
->language
== language_cplus
21019 ? cu
->get_builder ()->get_global_symbols ()
21020 : cu
->list_in_scope
);
21023 case DW_TAG_imported_declaration
:
21024 case DW_TAG_namespace
:
21025 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21026 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21028 case DW_TAG_module
:
21029 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21030 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
21031 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21033 case DW_TAG_common_block
:
21034 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
21035 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
21036 add_symbol_to_list (sym
, cu
->list_in_scope
);
21039 /* Not a tag we recognize. Hopefully we aren't processing
21040 trash data, but since we must specifically ignore things
21041 we don't recognize, there is nothing else we should do at
21043 complaint (_("unsupported tag: '%s'"),
21044 dwarf_tag_name (die
->tag
));
21050 sym
->hash_next
= objfile
->template_symbols
;
21051 objfile
->template_symbols
= sym
;
21052 list_to_add
= NULL
;
21055 if (list_to_add
!= NULL
)
21056 add_symbol_to_list (sym
, list_to_add
);
21058 /* For the benefit of old versions of GCC, check for anonymous
21059 namespaces based on the demangled name. */
21060 if (!cu
->processing_has_namespace_info
21061 && cu
->language
== language_cplus
)
21062 cp_scan_for_anonymous_namespaces (cu
->get_builder (), sym
, objfile
);
21067 /* Given an attr with a DW_FORM_dataN value in host byte order,
21068 zero-extend it as appropriate for the symbol's type. The DWARF
21069 standard (v4) is not entirely clear about the meaning of using
21070 DW_FORM_dataN for a constant with a signed type, where the type is
21071 wider than the data. The conclusion of a discussion on the DWARF
21072 list was that this is unspecified. We choose to always zero-extend
21073 because that is the interpretation long in use by GCC. */
21076 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21077 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21079 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21080 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21081 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21082 LONGEST l
= DW_UNSND (attr
);
21084 if (bits
< sizeof (*value
) * 8)
21086 l
&= ((LONGEST
) 1 << bits
) - 1;
21089 else if (bits
== sizeof (*value
) * 8)
21093 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21094 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21101 /* Read a constant value from an attribute. Either set *VALUE, or if
21102 the value does not fit in *VALUE, set *BYTES - either already
21103 allocated on the objfile obstack, or newly allocated on OBSTACK,
21104 or, set *BATON, if we translated the constant to a location
21108 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21109 const char *name
, struct obstack
*obstack
,
21110 struct dwarf2_cu
*cu
,
21111 LONGEST
*value
, const gdb_byte
**bytes
,
21112 struct dwarf2_locexpr_baton
**baton
)
21114 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
21115 struct objfile
*objfile
= per_objfile
->objfile
;
21116 struct comp_unit_head
*cu_header
= &cu
->header
;
21117 struct dwarf_block
*blk
;
21118 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21119 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21125 switch (attr
->form
)
21128 case DW_FORM_addrx
:
21129 case DW_FORM_GNU_addr_index
:
21133 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21134 dwarf2_const_value_length_mismatch_complaint (name
,
21135 cu_header
->addr_size
,
21136 TYPE_LENGTH (type
));
21137 /* Symbols of this form are reasonably rare, so we just
21138 piggyback on the existing location code rather than writing
21139 a new implementation of symbol_computed_ops. */
21140 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21141 (*baton
)->per_objfile
= per_objfile
;
21142 (*baton
)->per_cu
= cu
->per_cu
;
21143 gdb_assert ((*baton
)->per_cu
);
21145 (*baton
)->size
= 2 + cu_header
->addr_size
;
21146 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21147 (*baton
)->data
= data
;
21149 data
[0] = DW_OP_addr
;
21150 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21151 byte_order
, DW_ADDR (attr
));
21152 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21155 case DW_FORM_string
:
21158 case DW_FORM_GNU_str_index
:
21159 case DW_FORM_GNU_strp_alt
:
21160 /* DW_STRING is already allocated on the objfile obstack, point
21162 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21164 case DW_FORM_block1
:
21165 case DW_FORM_block2
:
21166 case DW_FORM_block4
:
21167 case DW_FORM_block
:
21168 case DW_FORM_exprloc
:
21169 case DW_FORM_data16
:
21170 blk
= DW_BLOCK (attr
);
21171 if (TYPE_LENGTH (type
) != blk
->size
)
21172 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21173 TYPE_LENGTH (type
));
21174 *bytes
= blk
->data
;
21177 /* The DW_AT_const_value attributes are supposed to carry the
21178 symbol's value "represented as it would be on the target
21179 architecture." By the time we get here, it's already been
21180 converted to host endianness, so we just need to sign- or
21181 zero-extend it as appropriate. */
21182 case DW_FORM_data1
:
21183 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21185 case DW_FORM_data2
:
21186 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21188 case DW_FORM_data4
:
21189 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21191 case DW_FORM_data8
:
21192 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21195 case DW_FORM_sdata
:
21196 case DW_FORM_implicit_const
:
21197 *value
= DW_SND (attr
);
21200 case DW_FORM_udata
:
21201 *value
= DW_UNSND (attr
);
21205 complaint (_("unsupported const value attribute form: '%s'"),
21206 dwarf_form_name (attr
->form
));
21213 /* Copy constant value from an attribute to a symbol. */
21216 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21217 struct dwarf2_cu
*cu
)
21219 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21221 const gdb_byte
*bytes
;
21222 struct dwarf2_locexpr_baton
*baton
;
21224 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21225 sym
->print_name (),
21226 &objfile
->objfile_obstack
, cu
,
21227 &value
, &bytes
, &baton
);
21231 SYMBOL_LOCATION_BATON (sym
) = baton
;
21232 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21234 else if (bytes
!= NULL
)
21236 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21237 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21241 SYMBOL_VALUE (sym
) = value
;
21242 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21246 /* Return the type of the die in question using its DW_AT_type attribute. */
21248 static struct type
*
21249 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21251 struct attribute
*type_attr
;
21253 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21256 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21257 /* A missing DW_AT_type represents a void type. */
21258 return objfile_type (objfile
)->builtin_void
;
21261 return lookup_die_type (die
, type_attr
, cu
);
21264 /* True iff CU's producer generates GNAT Ada auxiliary information
21265 that allows to find parallel types through that information instead
21266 of having to do expensive parallel lookups by type name. */
21269 need_gnat_info (struct dwarf2_cu
*cu
)
21271 /* Assume that the Ada compiler was GNAT, which always produces
21272 the auxiliary information. */
21273 return (cu
->language
== language_ada
);
21276 /* Return the auxiliary type of the die in question using its
21277 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
21278 attribute is not present. */
21280 static struct type
*
21281 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21283 struct attribute
*type_attr
;
21285 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
21289 return lookup_die_type (die
, type_attr
, cu
);
21292 /* If DIE has a descriptive_type attribute, then set the TYPE's
21293 descriptive type accordingly. */
21296 set_descriptive_type (struct type
*type
, struct die_info
*die
,
21297 struct dwarf2_cu
*cu
)
21299 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
21301 if (descriptive_type
)
21303 ALLOCATE_GNAT_AUX_TYPE (type
);
21304 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
21308 /* Return the containing type of the die in question using its
21309 DW_AT_containing_type attribute. */
21311 static struct type
*
21312 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21314 struct attribute
*type_attr
;
21315 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21317 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
21319 error (_("Dwarf Error: Problem turning containing type into gdb type "
21320 "[in module %s]"), objfile_name (objfile
));
21322 return lookup_die_type (die
, type_attr
, cu
);
21325 /* Return an error marker type to use for the ill formed type in DIE/CU. */
21327 static struct type
*
21328 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
21330 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
21331 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21334 std::string message
21335 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
21336 objfile_name (objfile
),
21337 sect_offset_str (cu
->header
.sect_off
),
21338 sect_offset_str (die
->sect_off
));
21339 saved
= obstack_strdup (&objfile
->objfile_obstack
, message
);
21341 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
21344 /* Look up the type of DIE in CU using its type attribute ATTR.
21345 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
21346 DW_AT_containing_type.
21347 If there is no type substitute an error marker. */
21349 static struct type
*
21350 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
21351 struct dwarf2_cu
*cu
)
21353 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
21354 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21355 struct type
*this_type
;
21357 gdb_assert (attr
->name
== DW_AT_type
21358 || attr
->name
== DW_AT_GNAT_descriptive_type
21359 || attr
->name
== DW_AT_containing_type
);
21361 /* First see if we have it cached. */
21363 if (attr
->form
== DW_FORM_GNU_ref_alt
)
21365 struct dwarf2_per_cu_data
*per_cu
;
21366 sect_offset sect_off
= attr
->get_ref_die_offset ();
21368 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
21369 dwarf2_per_objfile
);
21370 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
21372 else if (attr
->form_is_ref ())
21374 sect_offset sect_off
= attr
->get_ref_die_offset ();
21376 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
21378 else if (attr
->form
== DW_FORM_ref_sig8
)
21380 ULONGEST signature
= DW_SIGNATURE (attr
);
21382 return get_signatured_type (die
, signature
, cu
);
21386 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
21387 " at %s [in module %s]"),
21388 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
21389 objfile_name (objfile
));
21390 return build_error_marker_type (cu
, die
);
21393 /* If not cached we need to read it in. */
21395 if (this_type
== NULL
)
21397 struct die_info
*type_die
= NULL
;
21398 struct dwarf2_cu
*type_cu
= cu
;
21400 if (attr
->form_is_ref ())
21401 type_die
= follow_die_ref (die
, attr
, &type_cu
);
21402 if (type_die
== NULL
)
21403 return build_error_marker_type (cu
, die
);
21404 /* If we find the type now, it's probably because the type came
21405 from an inter-CU reference and the type's CU got expanded before
21407 this_type
= read_type_die (type_die
, type_cu
);
21410 /* If we still don't have a type use an error marker. */
21412 if (this_type
== NULL
)
21413 return build_error_marker_type (cu
, die
);
21418 /* Return the type in DIE, CU.
21419 Returns NULL for invalid types.
21421 This first does a lookup in die_type_hash,
21422 and only reads the die in if necessary.
21424 NOTE: This can be called when reading in partial or full symbols. */
21426 static struct type
*
21427 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
21429 struct type
*this_type
;
21431 this_type
= get_die_type (die
, cu
);
21435 return read_type_die_1 (die
, cu
);
21438 /* Read the type in DIE, CU.
21439 Returns NULL for invalid types. */
21441 static struct type
*
21442 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
21444 struct type
*this_type
= NULL
;
21448 case DW_TAG_class_type
:
21449 case DW_TAG_interface_type
:
21450 case DW_TAG_structure_type
:
21451 case DW_TAG_union_type
:
21452 this_type
= read_structure_type (die
, cu
);
21454 case DW_TAG_enumeration_type
:
21455 this_type
= read_enumeration_type (die
, cu
);
21457 case DW_TAG_subprogram
:
21458 case DW_TAG_subroutine_type
:
21459 case DW_TAG_inlined_subroutine
:
21460 this_type
= read_subroutine_type (die
, cu
);
21462 case DW_TAG_array_type
:
21463 this_type
= read_array_type (die
, cu
);
21465 case DW_TAG_set_type
:
21466 this_type
= read_set_type (die
, cu
);
21468 case DW_TAG_pointer_type
:
21469 this_type
= read_tag_pointer_type (die
, cu
);
21471 case DW_TAG_ptr_to_member_type
:
21472 this_type
= read_tag_ptr_to_member_type (die
, cu
);
21474 case DW_TAG_reference_type
:
21475 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
21477 case DW_TAG_rvalue_reference_type
:
21478 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
21480 case DW_TAG_const_type
:
21481 this_type
= read_tag_const_type (die
, cu
);
21483 case DW_TAG_volatile_type
:
21484 this_type
= read_tag_volatile_type (die
, cu
);
21486 case DW_TAG_restrict_type
:
21487 this_type
= read_tag_restrict_type (die
, cu
);
21489 case DW_TAG_string_type
:
21490 this_type
= read_tag_string_type (die
, cu
);
21492 case DW_TAG_typedef
:
21493 this_type
= read_typedef (die
, cu
);
21495 case DW_TAG_subrange_type
:
21496 this_type
= read_subrange_type (die
, cu
);
21498 case DW_TAG_base_type
:
21499 this_type
= read_base_type (die
, cu
);
21501 case DW_TAG_unspecified_type
:
21502 this_type
= read_unspecified_type (die
, cu
);
21504 case DW_TAG_namespace
:
21505 this_type
= read_namespace_type (die
, cu
);
21507 case DW_TAG_module
:
21508 this_type
= read_module_type (die
, cu
);
21510 case DW_TAG_atomic_type
:
21511 this_type
= read_tag_atomic_type (die
, cu
);
21514 complaint (_("unexpected tag in read_type_die: '%s'"),
21515 dwarf_tag_name (die
->tag
));
21522 /* See if we can figure out if the class lives in a namespace. We do
21523 this by looking for a member function; its demangled name will
21524 contain namespace info, if there is any.
21525 Return the computed name or NULL.
21526 Space for the result is allocated on the objfile's obstack.
21527 This is the full-die version of guess_partial_die_structure_name.
21528 In this case we know DIE has no useful parent. */
21530 static const char *
21531 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21533 struct die_info
*spec_die
;
21534 struct dwarf2_cu
*spec_cu
;
21535 struct die_info
*child
;
21536 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21539 spec_die
= die_specification (die
, &spec_cu
);
21540 if (spec_die
!= NULL
)
21546 for (child
= die
->child
;
21548 child
= child
->sibling
)
21550 if (child
->tag
== DW_TAG_subprogram
)
21552 const char *linkage_name
= dw2_linkage_name (child
, cu
);
21554 if (linkage_name
!= NULL
)
21556 gdb::unique_xmalloc_ptr
<char> actual_name
21557 (language_class_name_from_physname (cu
->language_defn
,
21559 const char *name
= NULL
;
21561 if (actual_name
!= NULL
)
21563 const char *die_name
= dwarf2_name (die
, cu
);
21565 if (die_name
!= NULL
21566 && strcmp (die_name
, actual_name
.get ()) != 0)
21568 /* Strip off the class name from the full name.
21569 We want the prefix. */
21570 int die_name_len
= strlen (die_name
);
21571 int actual_name_len
= strlen (actual_name
.get ());
21572 const char *ptr
= actual_name
.get ();
21574 /* Test for '::' as a sanity check. */
21575 if (actual_name_len
> die_name_len
+ 2
21576 && ptr
[actual_name_len
- die_name_len
- 1] == ':')
21577 name
= obstack_strndup (
21578 &objfile
->per_bfd
->storage_obstack
,
21579 ptr
, actual_name_len
- die_name_len
- 2);
21590 /* GCC might emit a nameless typedef that has a linkage name. Determine the
21591 prefix part in such case. See
21592 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21594 static const char *
21595 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
21597 struct attribute
*attr
;
21600 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
21601 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
21604 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
21607 attr
= dw2_linkage_name_attr (die
, cu
);
21608 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21611 /* dwarf2_name had to be already called. */
21612 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
21614 /* Strip the base name, keep any leading namespaces/classes. */
21615 base
= strrchr (DW_STRING (attr
), ':');
21616 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
21619 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21620 return obstack_strndup (&objfile
->per_bfd
->storage_obstack
,
21622 &base
[-1] - DW_STRING (attr
));
21625 /* Return the name of the namespace/class that DIE is defined within,
21626 or "" if we can't tell. The caller should not xfree the result.
21628 For example, if we're within the method foo() in the following
21638 then determine_prefix on foo's die will return "N::C". */
21640 static const char *
21641 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
21643 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
21644 struct die_info
*parent
, *spec_die
;
21645 struct dwarf2_cu
*spec_cu
;
21646 struct type
*parent_type
;
21647 const char *retval
;
21649 if (cu
->language
!= language_cplus
21650 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
21651 && cu
->language
!= language_rust
)
21654 retval
= anonymous_struct_prefix (die
, cu
);
21658 /* We have to be careful in the presence of DW_AT_specification.
21659 For example, with GCC 3.4, given the code
21663 // Definition of N::foo.
21667 then we'll have a tree of DIEs like this:
21669 1: DW_TAG_compile_unit
21670 2: DW_TAG_namespace // N
21671 3: DW_TAG_subprogram // declaration of N::foo
21672 4: DW_TAG_subprogram // definition of N::foo
21673 DW_AT_specification // refers to die #3
21675 Thus, when processing die #4, we have to pretend that we're in
21676 the context of its DW_AT_specification, namely the contex of die
21679 spec_die
= die_specification (die
, &spec_cu
);
21680 if (spec_die
== NULL
)
21681 parent
= die
->parent
;
21684 parent
= spec_die
->parent
;
21688 if (parent
== NULL
)
21690 else if (parent
->building_fullname
)
21693 const char *parent_name
;
21695 /* It has been seen on RealView 2.2 built binaries,
21696 DW_TAG_template_type_param types actually _defined_ as
21697 children of the parent class:
21700 template class <class Enum> Class{};
21701 Class<enum E> class_e;
21703 1: DW_TAG_class_type (Class)
21704 2: DW_TAG_enumeration_type (E)
21705 3: DW_TAG_enumerator (enum1:0)
21706 3: DW_TAG_enumerator (enum2:1)
21708 2: DW_TAG_template_type_param
21709 DW_AT_type DW_FORM_ref_udata (E)
21711 Besides being broken debug info, it can put GDB into an
21712 infinite loop. Consider:
21714 When we're building the full name for Class<E>, we'll start
21715 at Class, and go look over its template type parameters,
21716 finding E. We'll then try to build the full name of E, and
21717 reach here. We're now trying to build the full name of E,
21718 and look over the parent DIE for containing scope. In the
21719 broken case, if we followed the parent DIE of E, we'd again
21720 find Class, and once again go look at its template type
21721 arguments, etc., etc. Simply don't consider such parent die
21722 as source-level parent of this die (it can't be, the language
21723 doesn't allow it), and break the loop here. */
21724 name
= dwarf2_name (die
, cu
);
21725 parent_name
= dwarf2_name (parent
, cu
);
21726 complaint (_("template param type '%s' defined within parent '%s'"),
21727 name
? name
: "<unknown>",
21728 parent_name
? parent_name
: "<unknown>");
21732 switch (parent
->tag
)
21734 case DW_TAG_namespace
:
21735 parent_type
= read_type_die (parent
, cu
);
21736 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
21737 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
21738 Work around this problem here. */
21739 if (cu
->language
== language_cplus
21740 && strcmp (parent_type
->name (), "::") == 0)
21742 /* We give a name to even anonymous namespaces. */
21743 return parent_type
->name ();
21744 case DW_TAG_class_type
:
21745 case DW_TAG_interface_type
:
21746 case DW_TAG_structure_type
:
21747 case DW_TAG_union_type
:
21748 case DW_TAG_module
:
21749 parent_type
= read_type_die (parent
, cu
);
21750 if (parent_type
->name () != NULL
)
21751 return parent_type
->name ();
21753 /* An anonymous structure is only allowed non-static data
21754 members; no typedefs, no member functions, et cetera.
21755 So it does not need a prefix. */
21757 case DW_TAG_compile_unit
:
21758 case DW_TAG_partial_unit
:
21759 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
21760 if (cu
->language
== language_cplus
21761 && !dwarf2_per_objfile
->per_bfd
->types
.empty ()
21762 && die
->child
!= NULL
21763 && (die
->tag
== DW_TAG_class_type
21764 || die
->tag
== DW_TAG_structure_type
21765 || die
->tag
== DW_TAG_union_type
))
21767 const char *name
= guess_full_die_structure_name (die
, cu
);
21772 case DW_TAG_subprogram
:
21773 /* Nested subroutines in Fortran get a prefix with the name
21774 of the parent's subroutine. */
21775 if (cu
->language
== language_fortran
)
21777 if ((die
->tag
== DW_TAG_subprogram
)
21778 && (dwarf2_name (parent
, cu
) != NULL
))
21779 return dwarf2_name (parent
, cu
);
21781 return determine_prefix (parent
, cu
);
21782 case DW_TAG_enumeration_type
:
21783 parent_type
= read_type_die (parent
, cu
);
21784 if (TYPE_DECLARED_CLASS (parent_type
))
21786 if (parent_type
->name () != NULL
)
21787 return parent_type
->name ();
21790 /* Fall through. */
21792 return determine_prefix (parent
, cu
);
21796 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
21797 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
21798 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
21799 an obconcat, otherwise allocate storage for the result. The CU argument is
21800 used to determine the language and hence, the appropriate separator. */
21802 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
21805 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
21806 int physname
, struct dwarf2_cu
*cu
)
21808 const char *lead
= "";
21811 if (suffix
== NULL
|| suffix
[0] == '\0'
21812 || prefix
== NULL
|| prefix
[0] == '\0')
21814 else if (cu
->language
== language_d
)
21816 /* For D, the 'main' function could be defined in any module, but it
21817 should never be prefixed. */
21818 if (strcmp (suffix
, "D main") == 0)
21826 else if (cu
->language
== language_fortran
&& physname
)
21828 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
21829 DW_AT_MIPS_linkage_name is preferred and used instead. */
21837 if (prefix
== NULL
)
21839 if (suffix
== NULL
)
21846 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
21848 strcpy (retval
, lead
);
21849 strcat (retval
, prefix
);
21850 strcat (retval
, sep
);
21851 strcat (retval
, suffix
);
21856 /* We have an obstack. */
21857 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
21861 /* Get name of a die, return NULL if not found. */
21863 static const char *
21864 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
21865 struct objfile
*objfile
)
21867 if (name
&& cu
->language
== language_cplus
)
21869 gdb::unique_xmalloc_ptr
<char> canon_name
21870 = cp_canonicalize_string (name
);
21872 if (canon_name
!= nullptr)
21873 name
= objfile
->intern (canon_name
.get ());
21879 /* Get name of a die, return NULL if not found.
21880 Anonymous namespaces are converted to their magic string. */
21882 static const char *
21883 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21885 struct attribute
*attr
;
21886 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21888 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
21889 if ((!attr
|| !DW_STRING (attr
))
21890 && die
->tag
!= DW_TAG_namespace
21891 && die
->tag
!= DW_TAG_class_type
21892 && die
->tag
!= DW_TAG_interface_type
21893 && die
->tag
!= DW_TAG_structure_type
21894 && die
->tag
!= DW_TAG_union_type
)
21899 case DW_TAG_compile_unit
:
21900 case DW_TAG_partial_unit
:
21901 /* Compilation units have a DW_AT_name that is a filename, not
21902 a source language identifier. */
21903 case DW_TAG_enumeration_type
:
21904 case DW_TAG_enumerator
:
21905 /* These tags always have simple identifiers already; no need
21906 to canonicalize them. */
21907 return DW_STRING (attr
);
21909 case DW_TAG_namespace
:
21910 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
21911 return DW_STRING (attr
);
21912 return CP_ANONYMOUS_NAMESPACE_STR
;
21914 case DW_TAG_class_type
:
21915 case DW_TAG_interface_type
:
21916 case DW_TAG_structure_type
:
21917 case DW_TAG_union_type
:
21918 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
21919 structures or unions. These were of the form "._%d" in GCC 4.1,
21920 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
21921 and GCC 4.4. We work around this problem by ignoring these. */
21922 if (attr
&& DW_STRING (attr
)
21923 && (startswith (DW_STRING (attr
), "._")
21924 || startswith (DW_STRING (attr
), "<anonymous")))
21927 /* GCC might emit a nameless typedef that has a linkage name. See
21928 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
21929 if (!attr
|| DW_STRING (attr
) == NULL
)
21931 attr
= dw2_linkage_name_attr (die
, cu
);
21932 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
21935 /* Avoid demangling DW_STRING (attr) the second time on a second
21936 call for the same DIE. */
21937 if (!DW_STRING_IS_CANONICAL (attr
))
21939 gdb::unique_xmalloc_ptr
<char> demangled
21940 (gdb_demangle (DW_STRING (attr
), DMGL_TYPES
));
21941 if (demangled
== nullptr)
21944 DW_STRING (attr
) = objfile
->intern (demangled
.get ());
21945 DW_STRING_IS_CANONICAL (attr
) = 1;
21948 /* Strip any leading namespaces/classes, keep only the base name.
21949 DW_AT_name for named DIEs does not contain the prefixes. */
21950 const char *base
= strrchr (DW_STRING (attr
), ':');
21951 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
21954 return DW_STRING (attr
);
21962 if (!DW_STRING_IS_CANONICAL (attr
))
21964 DW_STRING (attr
) = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
21966 DW_STRING_IS_CANONICAL (attr
) = 1;
21968 return DW_STRING (attr
);
21971 /* Return the die that this die in an extension of, or NULL if there
21972 is none. *EXT_CU is the CU containing DIE on input, and the CU
21973 containing the return value on output. */
21975 static struct die_info
*
21976 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
21978 struct attribute
*attr
;
21980 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
21984 return follow_die_ref (die
, attr
, ext_cu
);
21988 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
21992 print_spaces (indent
, f
);
21993 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
21994 dwarf_tag_name (die
->tag
), die
->abbrev
,
21995 sect_offset_str (die
->sect_off
));
21997 if (die
->parent
!= NULL
)
21999 print_spaces (indent
, f
);
22000 fprintf_unfiltered (f
, " parent at offset: %s\n",
22001 sect_offset_str (die
->parent
->sect_off
));
22004 print_spaces (indent
, f
);
22005 fprintf_unfiltered (f
, " has children: %s\n",
22006 dwarf_bool_name (die
->child
!= NULL
));
22008 print_spaces (indent
, f
);
22009 fprintf_unfiltered (f
, " attributes:\n");
22011 for (i
= 0; i
< die
->num_attrs
; ++i
)
22013 print_spaces (indent
, f
);
22014 fprintf_unfiltered (f
, " %s (%s) ",
22015 dwarf_attr_name (die
->attrs
[i
].name
),
22016 dwarf_form_name (die
->attrs
[i
].form
));
22018 switch (die
->attrs
[i
].form
)
22021 case DW_FORM_addrx
:
22022 case DW_FORM_GNU_addr_index
:
22023 fprintf_unfiltered (f
, "address: ");
22024 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
22026 case DW_FORM_block2
:
22027 case DW_FORM_block4
:
22028 case DW_FORM_block
:
22029 case DW_FORM_block1
:
22030 fprintf_unfiltered (f
, "block: size %s",
22031 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22033 case DW_FORM_exprloc
:
22034 fprintf_unfiltered (f
, "expression: size %s",
22035 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22037 case DW_FORM_data16
:
22038 fprintf_unfiltered (f
, "constant of 16 bytes");
22040 case DW_FORM_ref_addr
:
22041 fprintf_unfiltered (f
, "ref address: ");
22042 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22044 case DW_FORM_GNU_ref_alt
:
22045 fprintf_unfiltered (f
, "alt ref address: ");
22046 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22052 case DW_FORM_ref_udata
:
22053 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
22054 (long) (DW_UNSND (&die
->attrs
[i
])));
22056 case DW_FORM_data1
:
22057 case DW_FORM_data2
:
22058 case DW_FORM_data4
:
22059 case DW_FORM_data8
:
22060 case DW_FORM_udata
:
22061 case DW_FORM_sdata
:
22062 fprintf_unfiltered (f
, "constant: %s",
22063 pulongest (DW_UNSND (&die
->attrs
[i
])));
22065 case DW_FORM_sec_offset
:
22066 fprintf_unfiltered (f
, "section offset: %s",
22067 pulongest (DW_UNSND (&die
->attrs
[i
])));
22069 case DW_FORM_ref_sig8
:
22070 fprintf_unfiltered (f
, "signature: %s",
22071 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
22073 case DW_FORM_string
:
22075 case DW_FORM_line_strp
:
22077 case DW_FORM_GNU_str_index
:
22078 case DW_FORM_GNU_strp_alt
:
22079 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22080 DW_STRING (&die
->attrs
[i
])
22081 ? DW_STRING (&die
->attrs
[i
]) : "",
22082 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
22085 if (DW_UNSND (&die
->attrs
[i
]))
22086 fprintf_unfiltered (f
, "flag: TRUE");
22088 fprintf_unfiltered (f
, "flag: FALSE");
22090 case DW_FORM_flag_present
:
22091 fprintf_unfiltered (f
, "flag: TRUE");
22093 case DW_FORM_indirect
:
22094 /* The reader will have reduced the indirect form to
22095 the "base form" so this form should not occur. */
22096 fprintf_unfiltered (f
,
22097 "unexpected attribute form: DW_FORM_indirect");
22099 case DW_FORM_implicit_const
:
22100 fprintf_unfiltered (f
, "constant: %s",
22101 plongest (DW_SND (&die
->attrs
[i
])));
22104 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
22105 die
->attrs
[i
].form
);
22108 fprintf_unfiltered (f
, "\n");
22113 dump_die_for_error (struct die_info
*die
)
22115 dump_die_shallow (gdb_stderr
, 0, die
);
22119 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
22121 int indent
= level
* 4;
22123 gdb_assert (die
!= NULL
);
22125 if (level
>= max_level
)
22128 dump_die_shallow (f
, indent
, die
);
22130 if (die
->child
!= NULL
)
22132 print_spaces (indent
, f
);
22133 fprintf_unfiltered (f
, " Children:");
22134 if (level
+ 1 < max_level
)
22136 fprintf_unfiltered (f
, "\n");
22137 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22141 fprintf_unfiltered (f
,
22142 " [not printed, max nesting level reached]\n");
22146 if (die
->sibling
!= NULL
&& level
> 0)
22148 dump_die_1 (f
, level
, max_level
, die
->sibling
);
22152 /* This is called from the pdie macro in gdbinit.in.
22153 It's not static so gcc will keep a copy callable from gdb. */
22156 dump_die (struct die_info
*die
, int max_level
)
22158 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
22162 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
22166 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
22167 to_underlying (die
->sect_off
),
22173 /* Follow reference or signature attribute ATTR of SRC_DIE.
22174 On entry *REF_CU is the CU of SRC_DIE.
22175 On exit *REF_CU is the CU of the result. */
22177 static struct die_info
*
22178 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22179 struct dwarf2_cu
**ref_cu
)
22181 struct die_info
*die
;
22183 if (attr
->form_is_ref ())
22184 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22185 else if (attr
->form
== DW_FORM_ref_sig8
)
22186 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22189 dump_die_for_error (src_die
);
22190 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22191 objfile_name ((*ref_cu
)->per_objfile
->objfile
));
22197 /* Follow reference OFFSET.
22198 On entry *REF_CU is the CU of the source die referencing OFFSET.
22199 On exit *REF_CU is the CU of the result.
22200 Returns NULL if OFFSET is invalid. */
22202 static struct die_info
*
22203 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22204 struct dwarf2_cu
**ref_cu
)
22206 struct die_info temp_die
;
22207 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22208 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
22210 gdb_assert (cu
->per_cu
!= NULL
);
22214 if (cu
->per_cu
->is_debug_types
)
22216 /* .debug_types CUs cannot reference anything outside their CU.
22217 If they need to, they have to reference a signatured type via
22218 DW_FORM_ref_sig8. */
22219 if (!cu
->header
.offset_in_cu_p (sect_off
))
22222 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22223 || !cu
->header
.offset_in_cu_p (sect_off
))
22225 struct dwarf2_per_cu_data
*per_cu
;
22227 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22228 dwarf2_per_objfile
);
22230 /* If necessary, add it to the queue and load its DIEs. */
22231 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
22232 load_full_comp_unit (per_cu
, dwarf2_per_objfile
, false, cu
->language
);
22234 target_cu
= per_cu
->cu
;
22236 else if (cu
->dies
== NULL
)
22238 /* We're loading full DIEs during partial symbol reading. */
22239 gdb_assert (dwarf2_per_objfile
->per_bfd
->reading_partial_symbols
);
22240 load_full_comp_unit (cu
->per_cu
, dwarf2_per_objfile
, false,
22244 *ref_cu
= target_cu
;
22245 temp_die
.sect_off
= sect_off
;
22247 if (target_cu
!= cu
)
22248 target_cu
->ancestor
= cu
;
22250 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22252 to_underlying (sect_off
));
22255 /* Follow reference attribute ATTR of SRC_DIE.
22256 On entry *REF_CU is the CU of SRC_DIE.
22257 On exit *REF_CU is the CU of the result. */
22259 static struct die_info
*
22260 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22261 struct dwarf2_cu
**ref_cu
)
22263 sect_offset sect_off
= attr
->get_ref_die_offset ();
22264 struct dwarf2_cu
*cu
= *ref_cu
;
22265 struct die_info
*die
;
22267 die
= follow_die_offset (sect_off
,
22268 (attr
->form
== DW_FORM_GNU_ref_alt
22269 || cu
->per_cu
->is_dwz
),
22272 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
22273 "at %s [in module %s]"),
22274 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
22275 objfile_name (cu
->per_objfile
->objfile
));
22282 struct dwarf2_locexpr_baton
22283 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
22284 dwarf2_per_cu_data
*per_cu
,
22285 CORE_ADDR (*get_frame_pc
) (void *baton
),
22286 void *baton
, bool resolve_abstract_p
)
22288 struct dwarf2_cu
*cu
;
22289 struct die_info
*die
;
22290 struct attribute
*attr
;
22291 struct dwarf2_locexpr_baton retval
;
22292 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
22293 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22295 if (per_cu
->cu
== NULL
)
22296 load_cu (per_cu
, dwarf2_per_objfile
, false);
22300 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22301 Instead just throw an error, not much else we can do. */
22302 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22303 sect_offset_str (sect_off
), objfile_name (objfile
));
22306 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22308 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22309 sect_offset_str (sect_off
), objfile_name (objfile
));
22311 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22312 if (!attr
&& resolve_abstract_p
22313 && (dwarf2_per_objfile
->per_bfd
->abstract_to_concrete
.find (die
->sect_off
)
22314 != dwarf2_per_objfile
->per_bfd
->abstract_to_concrete
.end ()))
22316 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22317 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
22318 struct gdbarch
*gdbarch
= objfile
->arch ();
22320 for (const auto &cand_off
22321 : dwarf2_per_objfile
->per_bfd
->abstract_to_concrete
[die
->sect_off
])
22323 struct dwarf2_cu
*cand_cu
= cu
;
22324 struct die_info
*cand
22325 = follow_die_offset (cand_off
, per_cu
->is_dwz
, &cand_cu
);
22328 || cand
->parent
->tag
!= DW_TAG_subprogram
)
22331 CORE_ADDR pc_low
, pc_high
;
22332 get_scope_pc_bounds (cand
->parent
, &pc_low
, &pc_high
, cu
);
22333 if (pc_low
== ((CORE_ADDR
) -1))
22335 pc_low
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_low
+ baseaddr
);
22336 pc_high
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_high
+ baseaddr
);
22337 if (!(pc_low
<= pc
&& pc
< pc_high
))
22341 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22348 /* DWARF: "If there is no such attribute, then there is no effect.".
22349 DATA is ignored if SIZE is 0. */
22351 retval
.data
= NULL
;
22354 else if (attr
->form_is_section_offset ())
22356 struct dwarf2_loclist_baton loclist_baton
;
22357 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22360 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
22362 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
22364 retval
.size
= size
;
22368 if (!attr
->form_is_block ())
22369 error (_("Dwarf Error: DIE at %s referenced in module %s "
22370 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
22371 sect_offset_str (sect_off
), objfile_name (objfile
));
22373 retval
.data
= DW_BLOCK (attr
)->data
;
22374 retval
.size
= DW_BLOCK (attr
)->size
;
22376 retval
.per_objfile
= dwarf2_per_objfile
;
22377 retval
.per_cu
= cu
->per_cu
;
22379 age_cached_comp_units (dwarf2_per_objfile
);
22386 struct dwarf2_locexpr_baton
22387 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
22388 dwarf2_per_cu_data
*per_cu
,
22389 CORE_ADDR (*get_frame_pc
) (void *baton
),
22392 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
22394 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
22397 /* Write a constant of a given type as target-ordered bytes into
22400 static const gdb_byte
*
22401 write_constant_as_bytes (struct obstack
*obstack
,
22402 enum bfd_endian byte_order
,
22409 *len
= TYPE_LENGTH (type
);
22410 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22411 store_unsigned_integer (result
, *len
, byte_order
, value
);
22419 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
22420 dwarf2_per_cu_data
*per_cu
,
22424 struct dwarf2_cu
*cu
;
22425 struct die_info
*die
;
22426 struct attribute
*attr
;
22427 const gdb_byte
*result
= NULL
;
22430 enum bfd_endian byte_order
;
22431 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
22433 if (per_cu
->cu
== NULL
)
22434 load_cu (per_cu
, per_cu
->dwarf2_per_objfile
, false);
22438 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22439 Instead just throw an error, not much else we can do. */
22440 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22441 sect_offset_str (sect_off
), objfile_name (objfile
));
22444 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22446 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22447 sect_offset_str (sect_off
), objfile_name (objfile
));
22449 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
22453 byte_order
= (bfd_big_endian (objfile
->obfd
)
22454 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
22456 switch (attr
->form
)
22459 case DW_FORM_addrx
:
22460 case DW_FORM_GNU_addr_index
:
22464 *len
= cu
->header
.addr_size
;
22465 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22466 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
22470 case DW_FORM_string
:
22473 case DW_FORM_GNU_str_index
:
22474 case DW_FORM_GNU_strp_alt
:
22475 /* DW_STRING is already allocated on the objfile obstack, point
22477 result
= (const gdb_byte
*) DW_STRING (attr
);
22478 *len
= strlen (DW_STRING (attr
));
22480 case DW_FORM_block1
:
22481 case DW_FORM_block2
:
22482 case DW_FORM_block4
:
22483 case DW_FORM_block
:
22484 case DW_FORM_exprloc
:
22485 case DW_FORM_data16
:
22486 result
= DW_BLOCK (attr
)->data
;
22487 *len
= DW_BLOCK (attr
)->size
;
22490 /* The DW_AT_const_value attributes are supposed to carry the
22491 symbol's value "represented as it would be on the target
22492 architecture." By the time we get here, it's already been
22493 converted to host endianness, so we just need to sign- or
22494 zero-extend it as appropriate. */
22495 case DW_FORM_data1
:
22496 type
= die_type (die
, cu
);
22497 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
22498 if (result
== NULL
)
22499 result
= write_constant_as_bytes (obstack
, byte_order
,
22502 case DW_FORM_data2
:
22503 type
= die_type (die
, cu
);
22504 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
22505 if (result
== NULL
)
22506 result
= write_constant_as_bytes (obstack
, byte_order
,
22509 case DW_FORM_data4
:
22510 type
= die_type (die
, cu
);
22511 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
22512 if (result
== NULL
)
22513 result
= write_constant_as_bytes (obstack
, byte_order
,
22516 case DW_FORM_data8
:
22517 type
= die_type (die
, cu
);
22518 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
22519 if (result
== NULL
)
22520 result
= write_constant_as_bytes (obstack
, byte_order
,
22524 case DW_FORM_sdata
:
22525 case DW_FORM_implicit_const
:
22526 type
= die_type (die
, cu
);
22527 result
= write_constant_as_bytes (obstack
, byte_order
,
22528 type
, DW_SND (attr
), len
);
22531 case DW_FORM_udata
:
22532 type
= die_type (die
, cu
);
22533 result
= write_constant_as_bytes (obstack
, byte_order
,
22534 type
, DW_UNSND (attr
), len
);
22538 complaint (_("unsupported const value attribute form: '%s'"),
22539 dwarf_form_name (attr
->form
));
22549 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
22550 dwarf2_per_cu_data
*per_cu
)
22552 struct dwarf2_cu
*cu
;
22553 struct die_info
*die
;
22555 if (per_cu
->cu
== NULL
)
22556 load_cu (per_cu
, per_cu
->dwarf2_per_objfile
, false);
22561 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22565 return die_type (die
, cu
);
22571 dwarf2_get_die_type (cu_offset die_offset
,
22572 struct dwarf2_per_cu_data
*per_cu
)
22574 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
22575 return get_die_type_at_offset (die_offset_sect
, per_cu
);
22578 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
22579 On entry *REF_CU is the CU of SRC_DIE.
22580 On exit *REF_CU is the CU of the result.
22581 Returns NULL if the referenced DIE isn't found. */
22583 static struct die_info
*
22584 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
22585 struct dwarf2_cu
**ref_cu
)
22587 struct die_info temp_die
;
22588 struct dwarf2_cu
*sig_cu
, *cu
= *ref_cu
;
22589 struct die_info
*die
;
22591 /* While it might be nice to assert sig_type->type == NULL here,
22592 we can get here for DW_AT_imported_declaration where we need
22593 the DIE not the type. */
22595 /* If necessary, add it to the queue and load its DIEs. */
22597 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
22598 read_signatured_type (sig_type
, (*ref_cu
)->per_objfile
);
22600 sig_cu
= sig_type
->per_cu
.cu
;
22601 gdb_assert (sig_cu
!= NULL
);
22602 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
22603 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
22604 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
22605 to_underlying (temp_die
.sect_off
));
22608 struct dwarf2_per_objfile
*dwarf2_per_objfile
= (*ref_cu
)->per_objfile
;
22610 /* For .gdb_index version 7 keep track of included TUs.
22611 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
22612 if (dwarf2_per_objfile
->per_bfd
->index_table
!= NULL
22613 && dwarf2_per_objfile
->per_bfd
->index_table
->version
<= 7)
22615 (*ref_cu
)->per_cu
->imported_symtabs_push (sig_cu
->per_cu
);
22620 sig_cu
->ancestor
= cu
;
22628 /* Follow signatured type referenced by ATTR in SRC_DIE.
22629 On entry *REF_CU is the CU of SRC_DIE.
22630 On exit *REF_CU is the CU of the result.
22631 The result is the DIE of the type.
22632 If the referenced type cannot be found an error is thrown. */
22634 static struct die_info
*
22635 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22636 struct dwarf2_cu
**ref_cu
)
22638 ULONGEST signature
= DW_SIGNATURE (attr
);
22639 struct signatured_type
*sig_type
;
22640 struct die_info
*die
;
22642 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
22644 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
22645 /* sig_type will be NULL if the signatured type is missing from
22647 if (sig_type
== NULL
)
22649 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
22650 " from DIE at %s [in module %s]"),
22651 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
22652 objfile_name ((*ref_cu
)->per_objfile
->objfile
));
22655 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
22658 dump_die_for_error (src_die
);
22659 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
22660 " from DIE at %s [in module %s]"),
22661 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
22662 objfile_name ((*ref_cu
)->per_objfile
->objfile
));
22668 /* Get the type specified by SIGNATURE referenced in DIE/CU,
22669 reading in and processing the type unit if necessary. */
22671 static struct type
*
22672 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
22673 struct dwarf2_cu
*cu
)
22675 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
22676 struct signatured_type
*sig_type
;
22677 struct dwarf2_cu
*type_cu
;
22678 struct die_info
*type_die
;
22681 sig_type
= lookup_signatured_type (cu
, signature
);
22682 /* sig_type will be NULL if the signatured type is missing from
22684 if (sig_type
== NULL
)
22686 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
22687 " from DIE at %s [in module %s]"),
22688 hex_string (signature
), sect_offset_str (die
->sect_off
),
22689 objfile_name (dwarf2_per_objfile
->objfile
));
22690 return build_error_marker_type (cu
, die
);
22693 /* If we already know the type we're done. */
22694 if (sig_type
->type
!= NULL
)
22695 return sig_type
->type
;
22698 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
22699 if (type_die
!= NULL
)
22701 /* N.B. We need to call get_die_type to ensure only one type for this DIE
22702 is created. This is important, for example, because for c++ classes
22703 we need TYPE_NAME set which is only done by new_symbol. Blech. */
22704 type
= read_type_die (type_die
, type_cu
);
22707 complaint (_("Dwarf Error: Cannot build signatured type %s"
22708 " referenced from DIE at %s [in module %s]"),
22709 hex_string (signature
), sect_offset_str (die
->sect_off
),
22710 objfile_name (dwarf2_per_objfile
->objfile
));
22711 type
= build_error_marker_type (cu
, die
);
22716 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
22717 " from DIE at %s [in module %s]"),
22718 hex_string (signature
), sect_offset_str (die
->sect_off
),
22719 objfile_name (dwarf2_per_objfile
->objfile
));
22720 type
= build_error_marker_type (cu
, die
);
22722 sig_type
->type
= type
;
22727 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
22728 reading in and processing the type unit if necessary. */
22730 static struct type
*
22731 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
22732 struct dwarf2_cu
*cu
) /* ARI: editCase function */
22734 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
22735 if (attr
->form_is_ref ())
22737 struct dwarf2_cu
*type_cu
= cu
;
22738 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
22740 return read_type_die (type_die
, type_cu
);
22742 else if (attr
->form
== DW_FORM_ref_sig8
)
22744 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
22748 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
22750 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
22751 " at %s [in module %s]"),
22752 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
22753 objfile_name (dwarf2_per_objfile
->objfile
));
22754 return build_error_marker_type (cu
, die
);
22758 /* Load the DIEs associated with type unit PER_CU into memory. */
22761 load_full_type_unit (dwarf2_per_cu_data
*per_cu
,
22762 dwarf2_per_objfile
*per_objfile
)
22764 struct signatured_type
*sig_type
;
22766 /* Caller is responsible for ensuring type_unit_groups don't get here. */
22767 gdb_assert (! per_cu
->type_unit_group_p ());
22769 /* We have the per_cu, but we need the signatured_type.
22770 Fortunately this is an easy translation. */
22771 gdb_assert (per_cu
->is_debug_types
);
22772 sig_type
= (struct signatured_type
*) per_cu
;
22774 gdb_assert (per_cu
->cu
== NULL
);
22776 read_signatured_type (sig_type
, per_objfile
);
22778 gdb_assert (per_cu
->cu
!= NULL
);
22781 /* Read in a signatured type and build its CU and DIEs.
22782 If the type is a stub for the real type in a DWO file,
22783 read in the real type from the DWO file as well. */
22786 read_signatured_type (signatured_type
*sig_type
,
22787 dwarf2_per_objfile
*per_objfile
)
22789 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
22791 gdb_assert (per_cu
->is_debug_types
);
22792 gdb_assert (per_cu
->cu
== NULL
);
22794 cutu_reader
reader (per_cu
, per_objfile
, NULL
, 0, false);
22796 if (!reader
.dummy_p
)
22798 struct dwarf2_cu
*cu
= reader
.cu
;
22799 const gdb_byte
*info_ptr
= reader
.info_ptr
;
22801 gdb_assert (cu
->die_hash
== NULL
);
22803 htab_create_alloc_ex (cu
->header
.length
/ 12,
22807 &cu
->comp_unit_obstack
,
22808 hashtab_obstack_allocate
,
22809 dummy_obstack_deallocate
);
22811 if (reader
.comp_unit_die
->has_children
)
22812 reader
.comp_unit_die
->child
22813 = read_die_and_siblings (&reader
, info_ptr
, &info_ptr
,
22814 reader
.comp_unit_die
);
22815 cu
->dies
= reader
.comp_unit_die
;
22816 /* comp_unit_die is not stored in die_hash, no need. */
22818 /* We try not to read any attributes in this function, because
22819 not all CUs needed for references have been loaded yet, and
22820 symbol table processing isn't initialized. But we have to
22821 set the CU language, or we won't be able to build types
22822 correctly. Similarly, if we do not read the producer, we can
22823 not apply producer-specific interpretation. */
22824 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
22829 sig_type
->per_cu
.tu_read
= 1;
22832 /* Decode simple location descriptions.
22833 Given a pointer to a dwarf block that defines a location, compute
22834 the location and return the value. If COMPUTED is non-null, it is
22835 set to true to indicate that decoding was successful, and false
22836 otherwise. If COMPUTED is null, then this function may emit a
22840 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
, bool *computed
)
22842 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
22844 size_t size
= blk
->size
;
22845 const gdb_byte
*data
= blk
->data
;
22846 CORE_ADDR stack
[64];
22848 unsigned int bytes_read
, unsnd
;
22851 if (computed
!= nullptr)
22857 stack
[++stacki
] = 0;
22896 stack
[++stacki
] = op
- DW_OP_lit0
;
22931 stack
[++stacki
] = op
- DW_OP_reg0
;
22934 if (computed
== nullptr)
22935 dwarf2_complex_location_expr_complaint ();
22942 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
22944 stack
[++stacki
] = unsnd
;
22947 if (computed
== nullptr)
22948 dwarf2_complex_location_expr_complaint ();
22955 stack
[++stacki
] = cu
->header
.read_address (objfile
->obfd
, &data
[i
],
22960 case DW_OP_const1u
:
22961 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
22965 case DW_OP_const1s
:
22966 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
22970 case DW_OP_const2u
:
22971 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
22975 case DW_OP_const2s
:
22976 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
22980 case DW_OP_const4u
:
22981 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
22985 case DW_OP_const4s
:
22986 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
22990 case DW_OP_const8u
:
22991 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
22996 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
23002 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
23007 stack
[stacki
+ 1] = stack
[stacki
];
23012 stack
[stacki
- 1] += stack
[stacki
];
23016 case DW_OP_plus_uconst
:
23017 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
23023 stack
[stacki
- 1] -= stack
[stacki
];
23028 /* If we're not the last op, then we definitely can't encode
23029 this using GDB's address_class enum. This is valid for partial
23030 global symbols, although the variable's address will be bogus
23034 if (computed
== nullptr)
23035 dwarf2_complex_location_expr_complaint ();
23041 case DW_OP_GNU_push_tls_address
:
23042 case DW_OP_form_tls_address
:
23043 /* The top of the stack has the offset from the beginning
23044 of the thread control block at which the variable is located. */
23045 /* Nothing should follow this operator, so the top of stack would
23047 /* This is valid for partial global symbols, but the variable's
23048 address will be bogus in the psymtab. Make it always at least
23049 non-zero to not look as a variable garbage collected by linker
23050 which have DW_OP_addr 0. */
23053 if (computed
== nullptr)
23054 dwarf2_complex_location_expr_complaint ();
23061 case DW_OP_GNU_uninit
:
23062 if (computed
!= nullptr)
23067 case DW_OP_GNU_addr_index
:
23068 case DW_OP_GNU_const_index
:
23069 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
23075 if (computed
== nullptr)
23077 const char *name
= get_DW_OP_name (op
);
23080 complaint (_("unsupported stack op: '%s'"),
23083 complaint (_("unsupported stack op: '%02x'"),
23087 return (stack
[stacki
]);
23090 /* Enforce maximum stack depth of SIZE-1 to avoid writing
23091 outside of the allocated space. Also enforce minimum>0. */
23092 if (stacki
>= ARRAY_SIZE (stack
) - 1)
23094 if (computed
== nullptr)
23095 complaint (_("location description stack overflow"));
23101 if (computed
== nullptr)
23102 complaint (_("location description stack underflow"));
23107 if (computed
!= nullptr)
23109 return (stack
[stacki
]);
23112 /* memory allocation interface */
23114 static struct dwarf_block
*
23115 dwarf_alloc_block (struct dwarf2_cu
*cu
)
23117 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
23120 static struct die_info
*
23121 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
23123 struct die_info
*die
;
23124 size_t size
= sizeof (struct die_info
);
23127 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
23129 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
23130 memset (die
, 0, sizeof (struct die_info
));
23136 /* Macro support. */
23138 /* An overload of dwarf_decode_macros that finds the correct section
23139 and ensures it is read in before calling the other overload. */
23142 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
23143 int section_is_gnu
)
23145 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
23146 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23147 const struct line_header
*lh
= cu
->line_header
;
23148 unsigned int offset_size
= cu
->header
.offset_size
;
23149 struct dwarf2_section_info
*section
;
23150 const char *section_name
;
23152 if (cu
->dwo_unit
!= nullptr)
23154 if (section_is_gnu
)
23156 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
23157 section_name
= ".debug_macro.dwo";
23161 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
23162 section_name
= ".debug_macinfo.dwo";
23167 if (section_is_gnu
)
23169 section
= &dwarf2_per_objfile
->per_bfd
->macro
;
23170 section_name
= ".debug_macro";
23174 section
= &dwarf2_per_objfile
->per_bfd
->macinfo
;
23175 section_name
= ".debug_macinfo";
23179 section
->read (objfile
);
23180 if (section
->buffer
== nullptr)
23182 complaint (_("missing %s section"), section_name
);
23186 buildsym_compunit
*builder
= cu
->get_builder ();
23188 dwarf_decode_macros (dwarf2_per_objfile
, builder
, section
, lh
,
23189 offset_size
, offset
, section_is_gnu
);
23192 /* Return the .debug_loc section to use for CU.
23193 For DWO files use .debug_loc.dwo. */
23195 static struct dwarf2_section_info
*
23196 cu_debug_loc_section (struct dwarf2_cu
*cu
)
23198 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
23202 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
23204 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
23206 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->per_bfd
->loclists
23207 : &dwarf2_per_objfile
->per_bfd
->loc
);
23210 /* A helper function that fills in a dwarf2_loclist_baton. */
23213 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
23214 struct dwarf2_loclist_baton
*baton
,
23215 const struct attribute
*attr
)
23217 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
23218 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23220 section
->read (dwarf2_per_objfile
->objfile
);
23222 baton
->per_objfile
= dwarf2_per_objfile
;
23223 baton
->per_cu
= cu
->per_cu
;
23224 gdb_assert (baton
->per_cu
);
23225 /* We don't know how long the location list is, but make sure we
23226 don't run off the edge of the section. */
23227 baton
->size
= section
->size
- DW_UNSND (attr
);
23228 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
23229 if (cu
->base_address
.has_value ())
23230 baton
->base_address
= *cu
->base_address
;
23232 baton
->base_address
= 0;
23233 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
23237 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
23238 struct dwarf2_cu
*cu
, int is_block
)
23240 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
23241 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23242 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23244 if (attr
->form_is_section_offset ()
23245 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
23246 the section. If so, fall through to the complaint in the
23248 && DW_UNSND (attr
) < section
->get_size (objfile
))
23250 struct dwarf2_loclist_baton
*baton
;
23252 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
23254 fill_in_loclist_baton (cu
, baton
, attr
);
23256 if (!cu
->base_address
.has_value ())
23257 complaint (_("Location list used without "
23258 "specifying the CU base address."));
23260 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23261 ? dwarf2_loclist_block_index
23262 : dwarf2_loclist_index
);
23263 SYMBOL_LOCATION_BATON (sym
) = baton
;
23267 struct dwarf2_locexpr_baton
*baton
;
23269 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
23270 baton
->per_objfile
= dwarf2_per_objfile
;
23271 baton
->per_cu
= cu
->per_cu
;
23272 gdb_assert (baton
->per_cu
);
23274 if (attr
->form_is_block ())
23276 /* Note that we're just copying the block's data pointer
23277 here, not the actual data. We're still pointing into the
23278 info_buffer for SYM's objfile; right now we never release
23279 that buffer, but when we do clean up properly this may
23281 baton
->size
= DW_BLOCK (attr
)->size
;
23282 baton
->data
= DW_BLOCK (attr
)->data
;
23286 dwarf2_invalid_attrib_class_complaint ("location description",
23287 sym
->natural_name ());
23291 SYMBOL_ACLASS_INDEX (sym
) = (is_block
23292 ? dwarf2_locexpr_block_index
23293 : dwarf2_locexpr_index
);
23294 SYMBOL_LOCATION_BATON (sym
) = baton
;
23301 dwarf2_per_cu_data::objfile () const
23303 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23305 /* Return the master objfile, so that we can report and look up the
23306 correct file containing this variable. */
23307 if (objfile
->separate_debug_objfile_backlink
)
23308 objfile
= objfile
->separate_debug_objfile_backlink
;
23313 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
23314 (CU_HEADERP is unused in such case) or prepare a temporary copy at
23315 CU_HEADERP first. */
23317 static const struct comp_unit_head
*
23318 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
23319 const struct dwarf2_per_cu_data
*per_cu
)
23321 const gdb_byte
*info_ptr
;
23324 return &per_cu
->cu
->header
;
23326 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
23328 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
23329 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
23330 rcuh_kind::COMPILE
);
23338 dwarf2_per_cu_data::addr_size () const
23340 struct comp_unit_head cu_header_local
;
23341 const struct comp_unit_head
*cu_headerp
;
23343 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23345 return cu_headerp
->addr_size
;
23351 dwarf2_per_cu_data::offset_size () const
23353 struct comp_unit_head cu_header_local
;
23354 const struct comp_unit_head
*cu_headerp
;
23356 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23358 return cu_headerp
->offset_size
;
23364 dwarf2_per_cu_data::ref_addr_size () const
23366 struct comp_unit_head cu_header_local
;
23367 const struct comp_unit_head
*cu_headerp
;
23369 cu_headerp
= per_cu_header_read_in (&cu_header_local
, this);
23371 if (cu_headerp
->version
== 2)
23372 return cu_headerp
->addr_size
;
23374 return cu_headerp
->offset_size
;
23380 dwarf2_per_cu_data::text_offset () const
23382 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23384 return objfile
->text_section_offset ();
23390 dwarf2_per_cu_data::addr_type () const
23392 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23393 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
23394 struct type
*addr_type
= lookup_pointer_type (void_type
);
23395 int addr_size
= this->addr_size ();
23397 if (TYPE_LENGTH (addr_type
) == addr_size
)
23400 addr_type
= addr_sized_int_type (TYPE_UNSIGNED (addr_type
));
23404 /* A helper function for dwarf2_find_containing_comp_unit that returns
23405 the index of the result, and that searches a vector. It will
23406 return a result even if the offset in question does not actually
23407 occur in any CU. This is separate so that it can be unit
23411 dwarf2_find_containing_comp_unit
23412 (sect_offset sect_off
,
23413 unsigned int offset_in_dwz
,
23414 const std::vector
<dwarf2_per_cu_data
*> &all_comp_units
)
23419 high
= all_comp_units
.size () - 1;
23422 struct dwarf2_per_cu_data
*mid_cu
;
23423 int mid
= low
+ (high
- low
) / 2;
23425 mid_cu
= all_comp_units
[mid
];
23426 if (mid_cu
->is_dwz
> offset_in_dwz
23427 || (mid_cu
->is_dwz
== offset_in_dwz
23428 && mid_cu
->sect_off
+ mid_cu
->length
> sect_off
))
23433 gdb_assert (low
== high
);
23437 /* Locate the .debug_info compilation unit from CU's objfile which contains
23438 the DIE at OFFSET. Raises an error on failure. */
23440 static struct dwarf2_per_cu_data
*
23441 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
23442 unsigned int offset_in_dwz
,
23443 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
23446 = dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
23447 dwarf2_per_objfile
->per_bfd
->all_comp_units
);
23448 struct dwarf2_per_cu_data
*this_cu
23449 = dwarf2_per_objfile
->per_bfd
->all_comp_units
[low
];
23451 if (this_cu
->is_dwz
!= offset_in_dwz
|| this_cu
->sect_off
> sect_off
)
23453 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
23454 error (_("Dwarf Error: could not find partial DIE containing "
23455 "offset %s [in module %s]"),
23456 sect_offset_str (sect_off
),
23457 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
23459 gdb_assert (dwarf2_per_objfile
->per_bfd
->all_comp_units
[low
-1]->sect_off
23461 return dwarf2_per_objfile
->per_bfd
->all_comp_units
[low
-1];
23465 if (low
== dwarf2_per_objfile
->per_bfd
->all_comp_units
.size () - 1
23466 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
23467 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
23468 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
23475 namespace selftests
{
23476 namespace find_containing_comp_unit
{
23481 struct dwarf2_per_cu_data one
{};
23482 struct dwarf2_per_cu_data two
{};
23483 struct dwarf2_per_cu_data three
{};
23484 struct dwarf2_per_cu_data four
{};
23487 two
.sect_off
= sect_offset (one
.length
);
23492 four
.sect_off
= sect_offset (three
.length
);
23496 std::vector
<dwarf2_per_cu_data
*> units
;
23497 units
.push_back (&one
);
23498 units
.push_back (&two
);
23499 units
.push_back (&three
);
23500 units
.push_back (&four
);
23504 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 0, units
);
23505 SELF_CHECK (units
[result
] == &one
);
23506 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 0, units
);
23507 SELF_CHECK (units
[result
] == &one
);
23508 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 0, units
);
23509 SELF_CHECK (units
[result
] == &two
);
23511 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 1, units
);
23512 SELF_CHECK (units
[result
] == &three
);
23513 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 1, units
);
23514 SELF_CHECK (units
[result
] == &three
);
23515 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 1, units
);
23516 SELF_CHECK (units
[result
] == &four
);
23522 #endif /* GDB_SELF_TEST */
23524 /* Initialize dwarf2_cu to read PER_CU, in the context of PER_OBJFILE. */
23526 dwarf2_cu::dwarf2_cu (dwarf2_per_cu_data
*per_cu
,
23527 dwarf2_per_objfile
*per_objfile
)
23529 per_objfile (per_objfile
),
23531 has_loclist (false),
23532 checked_producer (false),
23533 producer_is_gxx_lt_4_6 (false),
23534 producer_is_gcc_lt_4_3 (false),
23535 producer_is_icc (false),
23536 producer_is_icc_lt_14 (false),
23537 producer_is_codewarrior (false),
23538 processing_has_namespace_info (false)
23543 /* Destroy a dwarf2_cu. */
23545 dwarf2_cu::~dwarf2_cu ()
23550 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
23553 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
23554 enum language pretend_language
)
23556 struct attribute
*attr
;
23558 /* Set the language we're debugging. */
23559 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
23560 if (attr
!= nullptr)
23561 set_cu_language (DW_UNSND (attr
), cu
);
23564 cu
->language
= pretend_language
;
23565 cu
->language_defn
= language_def (cu
->language
);
23568 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
23571 /* Increase the age counter on each cached compilation unit, and free
23572 any that are too old. */
23575 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
23577 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23579 dwarf2_clear_marks (dwarf2_per_objfile
->per_bfd
->read_in_chain
);
23580 per_cu
= dwarf2_per_objfile
->per_bfd
->read_in_chain
;
23581 while (per_cu
!= NULL
)
23583 per_cu
->cu
->last_used
++;
23584 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
23585 dwarf2_mark (per_cu
->cu
);
23586 per_cu
= per_cu
->cu
->read_in_chain
;
23589 per_cu
= dwarf2_per_objfile
->per_bfd
->read_in_chain
;
23590 last_chain
= &dwarf2_per_objfile
->per_bfd
->read_in_chain
;
23591 while (per_cu
!= NULL
)
23593 struct dwarf2_per_cu_data
*next_cu
;
23595 next_cu
= per_cu
->cu
->read_in_chain
;
23597 if (!per_cu
->cu
->mark
)
23600 *last_chain
= next_cu
;
23603 last_chain
= &per_cu
->cu
->read_in_chain
;
23609 /* Remove a single compilation unit from the cache. */
23612 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
23614 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
23615 struct dwarf2_per_objfile
*dwarf2_per_objfile
23616 = target_per_cu
->dwarf2_per_objfile
;
23618 per_cu
= dwarf2_per_objfile
->per_bfd
->read_in_chain
;
23619 last_chain
= &dwarf2_per_objfile
->per_bfd
->read_in_chain
;
23620 while (per_cu
!= NULL
)
23622 struct dwarf2_per_cu_data
*next_cu
;
23624 next_cu
= per_cu
->cu
->read_in_chain
;
23626 if (per_cu
== target_per_cu
)
23630 *last_chain
= next_cu
;
23634 last_chain
= &per_cu
->cu
->read_in_chain
;
23640 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
23641 We store these in a hash table separate from the DIEs, and preserve them
23642 when the DIEs are flushed out of cache.
23644 The CU "per_cu" pointer is needed because offset alone is not enough to
23645 uniquely identify the type. A file may have multiple .debug_types sections,
23646 or the type may come from a DWO file. Furthermore, while it's more logical
23647 to use per_cu->section+offset, with Fission the section with the data is in
23648 the DWO file but we don't know that section at the point we need it.
23649 We have to use something in dwarf2_per_cu_data (or the pointer to it)
23650 because we can enter the lookup routine, get_die_type_at_offset, from
23651 outside this file, and thus won't necessarily have PER_CU->cu.
23652 Fortunately, PER_CU is stable for the life of the objfile. */
23654 struct dwarf2_per_cu_offset_and_type
23656 const struct dwarf2_per_cu_data
*per_cu
;
23657 sect_offset sect_off
;
23661 /* Hash function for a dwarf2_per_cu_offset_and_type. */
23664 per_cu_offset_and_type_hash (const void *item
)
23666 const struct dwarf2_per_cu_offset_and_type
*ofs
23667 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
23669 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
23672 /* Equality function for a dwarf2_per_cu_offset_and_type. */
23675 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
23677 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
23678 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
23679 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
23680 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
23682 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
23683 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
23686 /* Set the type associated with DIE to TYPE. Save it in CU's hash
23687 table if necessary. For convenience, return TYPE.
23689 The DIEs reading must have careful ordering to:
23690 * Not cause infinite loops trying to read in DIEs as a prerequisite for
23691 reading current DIE.
23692 * Not trying to dereference contents of still incompletely read in types
23693 while reading in other DIEs.
23694 * Enable referencing still incompletely read in types just by a pointer to
23695 the type without accessing its fields.
23697 Therefore caller should follow these rules:
23698 * Try to fetch any prerequisite types we may need to build this DIE type
23699 before building the type and calling set_die_type.
23700 * After building type call set_die_type for current DIE as soon as
23701 possible before fetching more types to complete the current type.
23702 * Make the type as complete as possible before fetching more types. */
23704 static struct type
*
23705 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
23707 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
23708 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
23709 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23710 struct attribute
*attr
;
23711 struct dynamic_prop prop
;
23713 /* For Ada types, make sure that the gnat-specific data is always
23714 initialized (if not already set). There are a few types where
23715 we should not be doing so, because the type-specific area is
23716 already used to hold some other piece of info (eg: TYPE_CODE_FLT
23717 where the type-specific area is used to store the floatformat).
23718 But this is not a problem, because the gnat-specific information
23719 is actually not needed for these types. */
23720 if (need_gnat_info (cu
)
23721 && type
->code () != TYPE_CODE_FUNC
23722 && type
->code () != TYPE_CODE_FLT
23723 && type
->code () != TYPE_CODE_METHODPTR
23724 && type
->code () != TYPE_CODE_MEMBERPTR
23725 && type
->code () != TYPE_CODE_METHOD
23726 && !HAVE_GNAT_AUX_INFO (type
))
23727 INIT_GNAT_SPECIFIC (type
);
23729 /* Read DW_AT_allocated and set in type. */
23730 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
23731 if (attr
!= NULL
&& attr
->form_is_block ())
23733 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
23734 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
23735 type
->add_dyn_prop (DYN_PROP_ALLOCATED
, prop
);
23737 else if (attr
!= NULL
)
23739 complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
23740 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23741 sect_offset_str (die
->sect_off
));
23744 /* Read DW_AT_associated and set in type. */
23745 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
23746 if (attr
!= NULL
&& attr
->form_is_block ())
23748 struct type
*prop_type
= cu
->per_cu
->addr_sized_int_type (false);
23749 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
23750 type
->add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
);
23752 else if (attr
!= NULL
)
23754 complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
23755 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
23756 sect_offset_str (die
->sect_off
));
23759 /* Read DW_AT_data_location and set in type. */
23760 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
23761 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
,
23762 cu
->per_cu
->addr_type ()))
23763 type
->add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
);
23765 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23766 dwarf2_per_objfile
->die_type_hash
23767 = htab_up (htab_create_alloc (127,
23768 per_cu_offset_and_type_hash
,
23769 per_cu_offset_and_type_eq
,
23770 NULL
, xcalloc
, xfree
));
23772 ofs
.per_cu
= cu
->per_cu
;
23773 ofs
.sect_off
= die
->sect_off
;
23775 slot
= (struct dwarf2_per_cu_offset_and_type
**)
23776 htab_find_slot (dwarf2_per_objfile
->die_type_hash
.get (), &ofs
, INSERT
);
23778 complaint (_("A problem internal to GDB: DIE %s has type already set"),
23779 sect_offset_str (die
->sect_off
));
23780 *slot
= XOBNEW (&objfile
->objfile_obstack
,
23781 struct dwarf2_per_cu_offset_and_type
);
23786 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
23787 or return NULL if the die does not have a saved type. */
23789 static struct type
*
23790 get_die_type_at_offset (sect_offset sect_off
,
23791 struct dwarf2_per_cu_data
*per_cu
)
23793 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
23794 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
23796 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
23799 ofs
.per_cu
= per_cu
;
23800 ofs
.sect_off
= sect_off
;
23801 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
23802 htab_find (dwarf2_per_objfile
->die_type_hash
.get (), &ofs
));
23809 /* Look up the type for DIE in CU in die_type_hash,
23810 or return NULL if DIE does not have a saved type. */
23812 static struct type
*
23813 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
23815 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
23818 /* Add a dependence relationship from CU to REF_PER_CU. */
23821 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
23822 struct dwarf2_per_cu_data
*ref_per_cu
)
23826 if (cu
->dependencies
== NULL
)
23828 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
23829 NULL
, &cu
->comp_unit_obstack
,
23830 hashtab_obstack_allocate
,
23831 dummy_obstack_deallocate
);
23833 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
23835 *slot
= ref_per_cu
;
23838 /* Subroutine of dwarf2_mark to pass to htab_traverse.
23839 Set the mark field in every compilation unit in the
23840 cache that we must keep because we are keeping CU. */
23843 dwarf2_mark_helper (void **slot
, void *data
)
23845 struct dwarf2_per_cu_data
*per_cu
;
23847 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
23849 /* cu->dependencies references may not yet have been ever read if QUIT aborts
23850 reading of the chain. As such dependencies remain valid it is not much
23851 useful to track and undo them during QUIT cleanups. */
23852 if (per_cu
->cu
== NULL
)
23855 if (per_cu
->cu
->mark
)
23857 per_cu
->cu
->mark
= true;
23859 if (per_cu
->cu
->dependencies
!= NULL
)
23860 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23865 /* Set the mark field in CU and in every other compilation unit in the
23866 cache that we must keep because we are keeping CU. */
23869 dwarf2_mark (struct dwarf2_cu
*cu
)
23874 if (cu
->dependencies
!= NULL
)
23875 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
23879 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
23883 per_cu
->cu
->mark
= false;
23884 per_cu
= per_cu
->cu
->read_in_chain
;
23888 /* Trivial hash function for partial_die_info: the hash value of a DIE
23889 is its offset in .debug_info for this objfile. */
23892 partial_die_hash (const void *item
)
23894 const struct partial_die_info
*part_die
23895 = (const struct partial_die_info
*) item
;
23897 return to_underlying (part_die
->sect_off
);
23900 /* Trivial comparison function for partial_die_info structures: two DIEs
23901 are equal if they have the same offset. */
23904 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
23906 const struct partial_die_info
*part_die_lhs
23907 = (const struct partial_die_info
*) item_lhs
;
23908 const struct partial_die_info
*part_die_rhs
23909 = (const struct partial_die_info
*) item_rhs
;
23911 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
23914 struct cmd_list_element
*set_dwarf_cmdlist
;
23915 struct cmd_list_element
*show_dwarf_cmdlist
;
23918 show_check_physname (struct ui_file
*file
, int from_tty
,
23919 struct cmd_list_element
*c
, const char *value
)
23921 fprintf_filtered (file
,
23922 _("Whether to check \"physname\" is %s.\n"),
23926 void _initialize_dwarf2_read ();
23928 _initialize_dwarf2_read ()
23930 add_basic_prefix_cmd ("dwarf", class_maintenance
, _("\
23931 Set DWARF specific variables.\n\
23932 Configure DWARF variables such as the cache size."),
23933 &set_dwarf_cmdlist
, "maintenance set dwarf ",
23934 0/*allow-unknown*/, &maintenance_set_cmdlist
);
23936 add_show_prefix_cmd ("dwarf", class_maintenance
, _("\
23937 Show DWARF specific variables.\n\
23938 Show DWARF variables such as the cache size."),
23939 &show_dwarf_cmdlist
, "maintenance show dwarf ",
23940 0/*allow-unknown*/, &maintenance_show_cmdlist
);
23942 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
23943 &dwarf_max_cache_age
, _("\
23944 Set the upper bound on the age of cached DWARF compilation units."), _("\
23945 Show the upper bound on the age of cached DWARF compilation units."), _("\
23946 A higher limit means that cached compilation units will be stored\n\
23947 in memory longer, and more total memory will be used. Zero disables\n\
23948 caching, which can slow down startup."),
23950 show_dwarf_max_cache_age
,
23951 &set_dwarf_cmdlist
,
23952 &show_dwarf_cmdlist
);
23954 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
23955 Set debugging of the DWARF reader."), _("\
23956 Show debugging of the DWARF reader."), _("\
23957 When enabled (non-zero), debugging messages are printed during DWARF\n\
23958 reading and symtab expansion. A value of 1 (one) provides basic\n\
23959 information. A value greater than 1 provides more verbose information."),
23962 &setdebuglist
, &showdebuglist
);
23964 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
23965 Set debugging of the DWARF DIE reader."), _("\
23966 Show debugging of the DWARF DIE reader."), _("\
23967 When enabled (non-zero), DIEs are dumped after they are read in.\n\
23968 The value is the maximum depth to print."),
23971 &setdebuglist
, &showdebuglist
);
23973 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
23974 Set debugging of the dwarf line reader."), _("\
23975 Show debugging of the dwarf line reader."), _("\
23976 When enabled (non-zero), line number entries are dumped as they are read in.\n\
23977 A value of 1 (one) provides basic information.\n\
23978 A value greater than 1 provides more verbose information."),
23981 &setdebuglist
, &showdebuglist
);
23983 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
23984 Set cross-checking of \"physname\" code against demangler."), _("\
23985 Show cross-checking of \"physname\" code against demangler."), _("\
23986 When enabled, GDB's internal \"physname\" code is checked against\n\
23988 NULL
, show_check_physname
,
23989 &setdebuglist
, &showdebuglist
);
23991 add_setshow_boolean_cmd ("use-deprecated-index-sections",
23992 no_class
, &use_deprecated_index_sections
, _("\
23993 Set whether to use deprecated gdb_index sections."), _("\
23994 Show whether to use deprecated gdb_index sections."), _("\
23995 When enabled, deprecated .gdb_index sections are used anyway.\n\
23996 Normally they are ignored either because of a missing feature or\n\
23997 performance issue.\n\
23998 Warning: This option must be enabled before gdb reads the file."),
24001 &setlist
, &showlist
);
24003 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
24004 &dwarf2_locexpr_funcs
);
24005 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
24006 &dwarf2_loclist_funcs
);
24008 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
24009 &dwarf2_block_frame_base_locexpr_funcs
);
24010 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
24011 &dwarf2_block_frame_base_loclist_funcs
);
24014 selftests::register_test ("dw2_expand_symtabs_matching",
24015 selftests::dw2_expand_symtabs_matching::run_test
);
24016 selftests::register_test ("dwarf2_find_containing_comp_unit",
24017 selftests::find_containing_comp_unit::run_test
);