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 /* This is used to store the data that is always per objfile. */
109 static const objfile_key
<dwarf2_per_objfile
> dwarf2_objfile_data_key
;
111 /* These are used to store the dwarf2_per_bfd objects.
113 objfiles having the same BFD, which doesn't require relocations, are going to
114 share a dwarf2_per_bfd object, which is held in the _bfd_data_key version.
116 Other objfiles are not going to share a dwarf2_per_bfd with any other
117 objfiles, so they'll have their own version kept in the _objfile_data_key
119 static const struct bfd_key
<dwarf2_per_bfd
> dwarf2_per_bfd_bfd_data_key
;
120 static const struct objfile_key
<dwarf2_per_bfd
> dwarf2_per_bfd_objfile_data_key
;
122 /* The "aclass" indices for various kinds of computed DWARF symbols. */
124 static int dwarf2_locexpr_index
;
125 static int dwarf2_loclist_index
;
126 static int dwarf2_locexpr_block_index
;
127 static int dwarf2_loclist_block_index
;
129 /* Size of .debug_loclists section header for 32-bit DWARF format. */
130 #define LOCLIST_HEADER_SIZE32 12
132 /* Size of .debug_loclists section header for 64-bit DWARF format. */
133 #define LOCLIST_HEADER_SIZE64 20
135 /* Size of .debug_rnglists section header for 32-bit DWARF format. */
136 #define RNGLIST_HEADER_SIZE32 12
138 /* Size of .debug_rnglists section header for 64-bit DWARF format. */
139 #define RNGLIST_HEADER_SIZE64 20
141 /* An index into a (C++) symbol name component in a symbol name as
142 recorded in the mapped_index's symbol table. For each C++ symbol
143 in the symbol table, we record one entry for the start of each
144 component in the symbol in a table of name components, and then
145 sort the table, in order to be able to binary search symbol names,
146 ignoring leading namespaces, both completion and regular look up.
147 For example, for symbol "A::B::C", we'll have an entry that points
148 to "A::B::C", another that points to "B::C", and another for "C".
149 Note that function symbols in GDB index have no parameter
150 information, just the function/method names. You can convert a
151 name_component to a "const char *" using the
152 'mapped_index::symbol_name_at(offset_type)' method. */
154 struct name_component
156 /* Offset in the symbol name where the component starts. Stored as
157 a (32-bit) offset instead of a pointer to save memory and improve
158 locality on 64-bit architectures. */
159 offset_type name_offset
;
161 /* The symbol's index in the symbol and constant pool tables of a
166 /* Base class containing bits shared by both .gdb_index and
167 .debug_name indexes. */
169 struct mapped_index_base
171 mapped_index_base () = default;
172 DISABLE_COPY_AND_ASSIGN (mapped_index_base
);
174 /* The name_component table (a sorted vector). See name_component's
175 description above. */
176 std::vector
<name_component
> name_components
;
178 /* How NAME_COMPONENTS is sorted. */
179 enum case_sensitivity name_components_casing
;
181 /* Return the number of names in the symbol table. */
182 virtual size_t symbol_name_count () const = 0;
184 /* Get the name of the symbol at IDX in the symbol table. */
185 virtual const char *symbol_name_at
186 (offset_type idx
, dwarf2_per_objfile
*per_objfile
) const = 0;
188 /* Return whether the name at IDX in the symbol table should be
190 virtual bool symbol_name_slot_invalid (offset_type idx
) const
195 /* Build the symbol name component sorted vector, if we haven't
197 void build_name_components (dwarf2_per_objfile
*per_objfile
);
199 /* Returns the lower (inclusive) and upper (exclusive) bounds of the
200 possible matches for LN_NO_PARAMS in the name component
202 std::pair
<std::vector
<name_component
>::const_iterator
,
203 std::vector
<name_component
>::const_iterator
>
204 find_name_components_bounds (const lookup_name_info
&ln_no_params
,
206 dwarf2_per_objfile
*per_objfile
) const;
208 /* Prevent deleting/destroying via a base class pointer. */
210 ~mapped_index_base() = default;
213 /* A description of the mapped index. The file format is described in
214 a comment by the code that writes the index. */
215 struct mapped_index final
: public mapped_index_base
217 /* A slot/bucket in the symbol table hash. */
218 struct symbol_table_slot
220 const offset_type name
;
221 const offset_type vec
;
224 /* Index data format version. */
227 /* The address table data. */
228 gdb::array_view
<const gdb_byte
> address_table
;
230 /* The symbol table, implemented as a hash table. */
231 gdb::array_view
<symbol_table_slot
> symbol_table
;
233 /* A pointer to the constant pool. */
234 const char *constant_pool
= nullptr;
236 bool symbol_name_slot_invalid (offset_type idx
) const override
238 const auto &bucket
= this->symbol_table
[idx
];
239 return bucket
.name
== 0 && bucket
.vec
== 0;
242 /* Convenience method to get at the name of the symbol at IDX in the
244 const char *symbol_name_at
245 (offset_type idx
, dwarf2_per_objfile
*per_objfile
) const override
246 { return this->constant_pool
+ MAYBE_SWAP (this->symbol_table
[idx
].name
); }
248 size_t symbol_name_count () const override
249 { return this->symbol_table
.size (); }
252 /* A description of the mapped .debug_names.
253 Uninitialized map has CU_COUNT 0. */
254 struct mapped_debug_names final
: public mapped_index_base
256 bfd_endian dwarf5_byte_order
;
257 bool dwarf5_is_dwarf64
;
258 bool augmentation_is_gdb
;
260 uint32_t cu_count
= 0;
261 uint32_t tu_count
, bucket_count
, name_count
;
262 const gdb_byte
*cu_table_reordered
, *tu_table_reordered
;
263 const uint32_t *bucket_table_reordered
, *hash_table_reordered
;
264 const gdb_byte
*name_table_string_offs_reordered
;
265 const gdb_byte
*name_table_entry_offs_reordered
;
266 const gdb_byte
*entry_pool
;
273 /* Attribute name DW_IDX_*. */
276 /* Attribute form DW_FORM_*. */
279 /* Value if FORM is DW_FORM_implicit_const. */
280 LONGEST implicit_const
;
282 std::vector
<attr
> attr_vec
;
285 std::unordered_map
<ULONGEST
, index_val
> abbrev_map
;
287 const char *namei_to_name
288 (uint32_t namei
, dwarf2_per_objfile
*per_objfile
) const;
290 /* Implementation of the mapped_index_base virtual interface, for
291 the name_components cache. */
293 const char *symbol_name_at
294 (offset_type idx
, dwarf2_per_objfile
*per_objfile
) const override
295 { return namei_to_name (idx
, per_objfile
); }
297 size_t symbol_name_count () const override
298 { return this->name_count
; }
301 /* See dwarf2read.h. */
304 get_dwarf2_per_objfile (struct objfile
*objfile
)
306 return dwarf2_objfile_data_key
.get (objfile
);
309 /* Default names of the debugging sections. */
311 /* Note that if the debugging section has been compressed, it might
312 have a name like .zdebug_info. */
314 static const struct dwarf2_debug_sections dwarf2_elf_names
=
316 { ".debug_info", ".zdebug_info" },
317 { ".debug_abbrev", ".zdebug_abbrev" },
318 { ".debug_line", ".zdebug_line" },
319 { ".debug_loc", ".zdebug_loc" },
320 { ".debug_loclists", ".zdebug_loclists" },
321 { ".debug_macinfo", ".zdebug_macinfo" },
322 { ".debug_macro", ".zdebug_macro" },
323 { ".debug_str", ".zdebug_str" },
324 { ".debug_str_offsets", ".zdebug_str_offsets" },
325 { ".debug_line_str", ".zdebug_line_str" },
326 { ".debug_ranges", ".zdebug_ranges" },
327 { ".debug_rnglists", ".zdebug_rnglists" },
328 { ".debug_types", ".zdebug_types" },
329 { ".debug_addr", ".zdebug_addr" },
330 { ".debug_frame", ".zdebug_frame" },
331 { ".eh_frame", NULL
},
332 { ".gdb_index", ".zgdb_index" },
333 { ".debug_names", ".zdebug_names" },
334 { ".debug_aranges", ".zdebug_aranges" },
338 /* List of DWO/DWP sections. */
340 static const struct dwop_section_names
342 struct dwarf2_section_names abbrev_dwo
;
343 struct dwarf2_section_names info_dwo
;
344 struct dwarf2_section_names line_dwo
;
345 struct dwarf2_section_names loc_dwo
;
346 struct dwarf2_section_names loclists_dwo
;
347 struct dwarf2_section_names macinfo_dwo
;
348 struct dwarf2_section_names macro_dwo
;
349 struct dwarf2_section_names rnglists_dwo
;
350 struct dwarf2_section_names str_dwo
;
351 struct dwarf2_section_names str_offsets_dwo
;
352 struct dwarf2_section_names types_dwo
;
353 struct dwarf2_section_names cu_index
;
354 struct dwarf2_section_names tu_index
;
358 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
359 { ".debug_info.dwo", ".zdebug_info.dwo" },
360 { ".debug_line.dwo", ".zdebug_line.dwo" },
361 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
362 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
363 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
364 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
365 { ".debug_rnglists.dwo", ".zdebug_rnglists.dwo" },
366 { ".debug_str.dwo", ".zdebug_str.dwo" },
367 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
368 { ".debug_types.dwo", ".zdebug_types.dwo" },
369 { ".debug_cu_index", ".zdebug_cu_index" },
370 { ".debug_tu_index", ".zdebug_tu_index" },
373 /* local data types */
375 /* The location list and range list sections (.debug_loclists & .debug_rnglists)
376 begin with a header, which contains the following information. */
377 struct loclists_rnglists_header
379 /* A 4-byte or 12-byte length containing the length of the
380 set of entries for this compilation unit, not including the
381 length field itself. */
384 /* A 2-byte version identifier. */
387 /* A 1-byte unsigned integer containing the size in bytes of an address on
388 the target system. */
389 unsigned char addr_size
;
391 /* A 1-byte unsigned integer containing the size in bytes of a segment selector
392 on the target system. */
393 unsigned char segment_collector_size
;
395 /* A 4-byte count of the number of offsets that follow the header. */
396 unsigned int offset_entry_count
;
399 /* Type used for delaying computation of method physnames.
400 See comments for compute_delayed_physnames. */
401 struct delayed_method_info
403 /* The type to which the method is attached, i.e., its parent class. */
406 /* The index of the method in the type's function fieldlists. */
409 /* The index of the method in the fieldlist. */
412 /* The name of the DIE. */
415 /* The DIE associated with this method. */
416 struct die_info
*die
;
419 /* Internal state when decoding a particular compilation unit. */
422 explicit dwarf2_cu (dwarf2_per_cu_data
*per_cu
,
423 dwarf2_per_objfile
*per_objfile
);
425 DISABLE_COPY_AND_ASSIGN (dwarf2_cu
);
427 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
428 Create the set of symtabs used by this TU, or if this TU is sharing
429 symtabs with another TU and the symtabs have already been created
430 then restore those symtabs in the line header.
431 We don't need the pc/line-number mapping for type units. */
432 void setup_type_unit_groups (struct die_info
*die
);
434 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
435 buildsym_compunit constructor. */
436 struct compunit_symtab
*start_symtab (const char *name
,
437 const char *comp_dir
,
440 /* Reset the builder. */
441 void reset_builder () { m_builder
.reset (); }
443 /* Return a type that is a generic pointer type, the size of which
444 matches the address size given in the compilation unit header for
446 struct type
*addr_type () const;
448 /* Find an integer type the same size as the address size given in
449 the compilation unit header for this CU. UNSIGNED_P controls if
450 the integer is unsigned or not. */
451 struct type
*addr_sized_int_type (bool unsigned_p
) const;
453 /* The header of the compilation unit. */
454 struct comp_unit_head header
{};
456 /* Base address of this compilation unit. */
457 gdb::optional
<CORE_ADDR
> base_address
;
459 /* The language we are debugging. */
460 enum language language
= language_unknown
;
461 const struct language_defn
*language_defn
= nullptr;
463 const char *producer
= nullptr;
466 /* The symtab builder for this CU. This is only non-NULL when full
467 symbols are being read. */
468 std::unique_ptr
<buildsym_compunit
> m_builder
;
471 /* The generic symbol table building routines have separate lists for
472 file scope symbols and all all other scopes (local scopes). So
473 we need to select the right one to pass to add_symbol_to_list().
474 We do it by keeping a pointer to the correct list in list_in_scope.
476 FIXME: The original dwarf code just treated the file scope as the
477 first local scope, and all other local scopes as nested local
478 scopes, and worked fine. Check to see if we really need to
479 distinguish these in buildsym.c. */
480 struct pending
**list_in_scope
= nullptr;
482 /* Hash table holding all the loaded partial DIEs
483 with partial_die->offset.SECT_OFF as hash. */
484 htab_t partial_dies
= nullptr;
486 /* Storage for things with the same lifetime as this read-in compilation
487 unit, including partial DIEs. */
488 auto_obstack comp_unit_obstack
;
490 /* Backlink to our per_cu entry. */
491 struct dwarf2_per_cu_data
*per_cu
;
493 /* The dwarf2_per_objfile that owns this. */
494 dwarf2_per_objfile
*per_objfile
;
496 /* How many compilation units ago was this CU last referenced? */
499 /* A hash table of DIE cu_offset for following references with
500 die_info->offset.sect_off as hash. */
501 htab_t die_hash
= nullptr;
503 /* Full DIEs if read in. */
504 struct die_info
*dies
= nullptr;
506 /* A set of pointers to dwarf2_per_cu_data objects for compilation
507 units referenced by this one. Only set during full symbol processing;
508 partial symbol tables do not have dependencies. */
509 htab_t dependencies
= nullptr;
511 /* Header data from the line table, during full symbol processing. */
512 struct line_header
*line_header
= nullptr;
513 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
514 it's owned by dwarf2_per_bfd::line_header_hash. If non-NULL,
515 this is the DW_TAG_compile_unit die for this CU. We'll hold on
516 to the line header as long as this DIE is being processed. See
517 process_die_scope. */
518 die_info
*line_header_die_owner
= nullptr;
520 /* A list of methods which need to have physnames computed
521 after all type information has been read. */
522 std::vector
<delayed_method_info
> method_list
;
524 /* To be copied to symtab->call_site_htab. */
525 htab_t call_site_htab
= nullptr;
527 /* Non-NULL if this CU came from a DWO file.
528 There is an invariant here that is important to remember:
529 Except for attributes copied from the top level DIE in the "main"
530 (or "stub") file in preparation for reading the DWO file
531 (e.g., DW_AT_addr_base), we KISS: there is only *one* CU.
532 Either there isn't a DWO file (in which case this is NULL and the point
533 is moot), or there is and either we're not going to read it (in which
534 case this is NULL) or there is and we are reading it (in which case this
536 struct dwo_unit
*dwo_unit
= nullptr;
538 /* The DW_AT_addr_base (DW_AT_GNU_addr_base) attribute if present.
539 Note this value comes from the Fission stub CU/TU's DIE. */
540 gdb::optional
<ULONGEST
> addr_base
;
542 /* The DW_AT_rnglists_base attribute if present.
543 Note this value comes from the Fission stub CU/TU's DIE.
544 Also note that the value is zero in the non-DWO case so this value can
545 be used without needing to know whether DWO files are in use or not.
546 N.B. This does not apply to DW_AT_ranges appearing in
547 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
548 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
549 DW_AT_rnglists_base *would* have to be applied, and we'd have to care
550 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
551 ULONGEST ranges_base
= 0;
553 /* The DW_AT_loclists_base attribute if present. */
554 ULONGEST loclist_base
= 0;
556 /* When reading debug info generated by older versions of rustc, we
557 have to rewrite some union types to be struct types with a
558 variant part. This rewriting must be done after the CU is fully
559 read in, because otherwise at the point of rewriting some struct
560 type might not have been fully processed. So, we keep a list of
561 all such types here and process them after expansion. */
562 std::vector
<struct type
*> rust_unions
;
564 /* The DW_AT_str_offsets_base attribute if present. For DWARF 4 version DWO
565 files, the value is implicitly zero. For DWARF 5 version DWO files, the
566 value is often implicit and is the size of the header of
567 .debug_str_offsets section (8 or 4, depending on the address size). */
568 gdb::optional
<ULONGEST
> str_offsets_base
;
570 /* Mark used when releasing cached dies. */
573 /* This CU references .debug_loc. See the symtab->locations_valid field.
574 This test is imperfect as there may exist optimized debug code not using
575 any location list and still facing inlining issues if handled as
576 unoptimized code. For a future better test see GCC PR other/32998. */
577 bool has_loclist
: 1;
579 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is true
580 if all the producer_is_* fields are valid. This information is cached
581 because profiling CU expansion showed excessive time spent in
582 producer_is_gxx_lt_4_6. */
583 bool checked_producer
: 1;
584 bool producer_is_gxx_lt_4_6
: 1;
585 bool producer_is_gcc_lt_4_3
: 1;
586 bool producer_is_icc
: 1;
587 bool producer_is_icc_lt_14
: 1;
588 bool producer_is_codewarrior
: 1;
590 /* When true, the file that we're processing is known to have
591 debugging info for C++ namespaces. GCC 3.3.x did not produce
592 this information, but later versions do. */
594 bool processing_has_namespace_info
: 1;
596 struct partial_die_info
*find_partial_die (sect_offset sect_off
);
598 /* If this CU was inherited by another CU (via specification,
599 abstract_origin, etc), this is the ancestor CU. */
602 /* Get the buildsym_compunit for this CU. */
603 buildsym_compunit
*get_builder ()
605 /* If this CU has a builder associated with it, use that. */
606 if (m_builder
!= nullptr)
607 return m_builder
.get ();
609 /* Otherwise, search ancestors for a valid builder. */
610 if (ancestor
!= nullptr)
611 return ancestor
->get_builder ();
617 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
618 This includes type_unit_group and quick_file_names. */
620 struct stmt_list_hash
622 /* The DWO unit this table is from or NULL if there is none. */
623 struct dwo_unit
*dwo_unit
;
625 /* Offset in .debug_line or .debug_line.dwo. */
626 sect_offset line_sect_off
;
629 /* Each element of dwarf2_per_bfd->type_unit_groups is a pointer to
630 an object of this type. This contains elements of type unit groups
631 that can be shared across objfiles. The non-shareable parts are in
632 type_unit_group_unshareable. */
634 struct type_unit_group
636 /* dwarf2read.c's main "handle" on a TU symtab.
637 To simplify things we create an artificial CU that "includes" all the
638 type units using this stmt_list so that the rest of the code still has
639 a "per_cu" handle on the symtab. */
640 struct dwarf2_per_cu_data per_cu
;
642 /* The TUs that share this DW_AT_stmt_list entry.
643 This is added to while parsing type units to build partial symtabs,
644 and is deleted afterwards and not used again. */
645 std::vector
<signatured_type
*> *tus
;
647 /* The data used to construct the hash key. */
648 struct stmt_list_hash hash
;
651 /* These sections are what may appear in a (real or virtual) DWO file. */
655 struct dwarf2_section_info abbrev
;
656 struct dwarf2_section_info line
;
657 struct dwarf2_section_info loc
;
658 struct dwarf2_section_info loclists
;
659 struct dwarf2_section_info macinfo
;
660 struct dwarf2_section_info macro
;
661 struct dwarf2_section_info rnglists
;
662 struct dwarf2_section_info str
;
663 struct dwarf2_section_info str_offsets
;
664 /* In the case of a virtual DWO file, these two are unused. */
665 struct dwarf2_section_info info
;
666 std::vector
<dwarf2_section_info
> types
;
669 /* CUs/TUs in DWP/DWO files. */
673 /* Backlink to the containing struct dwo_file. */
674 struct dwo_file
*dwo_file
;
676 /* The "id" that distinguishes this CU/TU.
677 .debug_info calls this "dwo_id", .debug_types calls this "signature".
678 Since signatures came first, we stick with it for consistency. */
681 /* The section this CU/TU lives in, in the DWO file. */
682 struct dwarf2_section_info
*section
;
684 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
685 sect_offset sect_off
;
688 /* For types, offset in the type's DIE of the type defined by this TU. */
689 cu_offset type_offset_in_tu
;
692 /* include/dwarf2.h defines the DWP section codes.
693 It defines a max value but it doesn't define a min value, which we
694 use for error checking, so provide one. */
696 enum dwp_v2_section_ids
701 /* Data for one DWO file.
703 This includes virtual DWO files (a virtual DWO file is a DWO file as it
704 appears in a DWP file). DWP files don't really have DWO files per se -
705 comdat folding of types "loses" the DWO file they came from, and from
706 a high level view DWP files appear to contain a mass of random types.
707 However, to maintain consistency with the non-DWP case we pretend DWP
708 files contain virtual DWO files, and we assign each TU with one virtual
709 DWO file (generally based on the line and abbrev section offsets -
710 a heuristic that seems to work in practice). */
714 dwo_file () = default;
715 DISABLE_COPY_AND_ASSIGN (dwo_file
);
717 /* The DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute.
718 For virtual DWO files the name is constructed from the section offsets
719 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
720 from related CU+TUs. */
721 const char *dwo_name
= nullptr;
723 /* The DW_AT_comp_dir attribute. */
724 const char *comp_dir
= nullptr;
726 /* The bfd, when the file is open. Otherwise this is NULL.
727 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
728 gdb_bfd_ref_ptr dbfd
;
730 /* The sections that make up this DWO file.
731 Remember that for virtual DWO files in DWP V2 or DWP V5, these are virtual
732 sections (for lack of a better name). */
733 struct dwo_sections sections
{};
735 /* The CUs in the file.
736 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
737 an extension to handle LLVM's Link Time Optimization output (where
738 multiple source files may be compiled into a single object/dwo pair). */
741 /* Table of TUs in the file.
742 Each element is a struct dwo_unit. */
746 /* These sections are what may appear in a DWP file. */
750 /* These are used by all DWP versions (1, 2 and 5). */
751 struct dwarf2_section_info str
;
752 struct dwarf2_section_info cu_index
;
753 struct dwarf2_section_info tu_index
;
755 /* These are only used by DWP version 2 and version 5 files.
756 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
757 sections are referenced by section number, and are not recorded here.
758 In DWP version 2 or 5 there is at most one copy of all these sections,
759 each section being (effectively) comprised of the concatenation of all of
760 the individual sections that exist in the version 1 format.
761 To keep the code simple we treat each of these concatenated pieces as a
762 section itself (a virtual section?). */
763 struct dwarf2_section_info abbrev
;
764 struct dwarf2_section_info info
;
765 struct dwarf2_section_info line
;
766 struct dwarf2_section_info loc
;
767 struct dwarf2_section_info loclists
;
768 struct dwarf2_section_info macinfo
;
769 struct dwarf2_section_info macro
;
770 struct dwarf2_section_info rnglists
;
771 struct dwarf2_section_info str_offsets
;
772 struct dwarf2_section_info types
;
775 /* These sections are what may appear in a virtual DWO file in DWP version 1.
776 A virtual DWO file is a DWO file as it appears in a DWP file. */
778 struct virtual_v1_dwo_sections
780 struct dwarf2_section_info abbrev
;
781 struct dwarf2_section_info line
;
782 struct dwarf2_section_info loc
;
783 struct dwarf2_section_info macinfo
;
784 struct dwarf2_section_info macro
;
785 struct dwarf2_section_info str_offsets
;
786 /* Each DWP hash table entry records one CU or one TU.
787 That is recorded here, and copied to dwo_unit.section. */
788 struct dwarf2_section_info info_or_types
;
791 /* Similar to virtual_v1_dwo_sections, but for DWP version 2 or 5.
792 In version 2, the sections of the DWO files are concatenated together
793 and stored in one section of that name. Thus each ELF section contains
794 several "virtual" sections. */
796 struct virtual_v2_or_v5_dwo_sections
798 bfd_size_type abbrev_offset
;
799 bfd_size_type abbrev_size
;
801 bfd_size_type line_offset
;
802 bfd_size_type line_size
;
804 bfd_size_type loc_offset
;
805 bfd_size_type loc_size
;
807 bfd_size_type loclists_offset
;
808 bfd_size_type loclists_size
;
810 bfd_size_type macinfo_offset
;
811 bfd_size_type macinfo_size
;
813 bfd_size_type macro_offset
;
814 bfd_size_type macro_size
;
816 bfd_size_type rnglists_offset
;
817 bfd_size_type rnglists_size
;
819 bfd_size_type str_offsets_offset
;
820 bfd_size_type str_offsets_size
;
822 /* Each DWP hash table entry records one CU or one TU.
823 That is recorded here, and copied to dwo_unit.section. */
824 bfd_size_type info_or_types_offset
;
825 bfd_size_type info_or_types_size
;
828 /* Contents of DWP hash tables. */
830 struct dwp_hash_table
832 uint32_t version
, nr_columns
;
833 uint32_t nr_units
, nr_slots
;
834 const gdb_byte
*hash_table
, *unit_table
;
839 const gdb_byte
*indices
;
843 /* This is indexed by column number and gives the id of the section
845 #define MAX_NR_V2_DWO_SECTIONS \
846 (1 /* .debug_info or .debug_types */ \
847 + 1 /* .debug_abbrev */ \
848 + 1 /* .debug_line */ \
849 + 1 /* .debug_loc */ \
850 + 1 /* .debug_str_offsets */ \
851 + 1 /* .debug_macro or .debug_macinfo */)
852 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
853 const gdb_byte
*offsets
;
854 const gdb_byte
*sizes
;
858 /* This is indexed by column number and gives the id of the section
860 #define MAX_NR_V5_DWO_SECTIONS \
861 (1 /* .debug_info */ \
862 + 1 /* .debug_abbrev */ \
863 + 1 /* .debug_line */ \
864 + 1 /* .debug_loclists */ \
865 + 1 /* .debug_str_offsets */ \
866 + 1 /* .debug_macro */ \
867 + 1 /* .debug_rnglists */)
868 int section_ids
[MAX_NR_V5_DWO_SECTIONS
];
869 const gdb_byte
*offsets
;
870 const gdb_byte
*sizes
;
875 /* Data for one DWP file. */
879 dwp_file (const char *name_
, gdb_bfd_ref_ptr
&&abfd
)
881 dbfd (std::move (abfd
))
885 /* Name of the file. */
888 /* File format version. */
892 gdb_bfd_ref_ptr dbfd
;
894 /* Section info for this file. */
895 struct dwp_sections sections
{};
897 /* Table of CUs in the file. */
898 const struct dwp_hash_table
*cus
= nullptr;
900 /* Table of TUs in the file. */
901 const struct dwp_hash_table
*tus
= nullptr;
903 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
907 /* Table to map ELF section numbers to their sections.
908 This is only needed for the DWP V1 file format. */
909 unsigned int num_sections
= 0;
910 asection
**elf_sections
= nullptr;
913 /* Struct used to pass misc. parameters to read_die_and_children, et
914 al. which are used for both .debug_info and .debug_types dies.
915 All parameters here are unchanging for the life of the call. This
916 struct exists to abstract away the constant parameters of die reading. */
918 struct die_reader_specs
920 /* The bfd of die_section. */
923 /* The CU of the DIE we are parsing. */
924 struct dwarf2_cu
*cu
;
926 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
927 struct dwo_file
*dwo_file
;
929 /* The section the die comes from.
930 This is either .debug_info or .debug_types, or the .dwo variants. */
931 struct dwarf2_section_info
*die_section
;
933 /* die_section->buffer. */
934 const gdb_byte
*buffer
;
936 /* The end of the buffer. */
937 const gdb_byte
*buffer_end
;
939 /* The abbreviation table to use when reading the DIEs. */
940 struct abbrev_table
*abbrev_table
;
943 /* A subclass of die_reader_specs that holds storage and has complex
944 constructor and destructor behavior. */
946 class cutu_reader
: public die_reader_specs
950 cutu_reader (dwarf2_per_cu_data
*this_cu
,
951 dwarf2_per_objfile
*per_objfile
,
952 struct abbrev_table
*abbrev_table
,
953 dwarf2_cu
*existing_cu
,
956 explicit cutu_reader (struct dwarf2_per_cu_data
*this_cu
,
957 dwarf2_per_objfile
*per_objfile
,
958 struct dwarf2_cu
*parent_cu
= nullptr,
959 struct dwo_file
*dwo_file
= nullptr);
961 DISABLE_COPY_AND_ASSIGN (cutu_reader
);
963 const gdb_byte
*info_ptr
= nullptr;
964 struct die_info
*comp_unit_die
= nullptr;
965 bool dummy_p
= false;
967 /* Release the new CU, putting it on the chain. This cannot be done
972 void init_tu_and_read_dwo_dies (dwarf2_per_cu_data
*this_cu
,
973 dwarf2_per_objfile
*per_objfile
,
974 dwarf2_cu
*existing_cu
);
976 struct dwarf2_per_cu_data
*m_this_cu
;
977 std::unique_ptr
<dwarf2_cu
> m_new_cu
;
979 /* The ordinary abbreviation table. */
980 abbrev_table_up m_abbrev_table_holder
;
982 /* The DWO abbreviation table. */
983 abbrev_table_up m_dwo_abbrev_table
;
986 /* When we construct a partial symbol table entry we only
987 need this much information. */
988 struct partial_die_info
: public allocate_on_obstack
990 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
992 /* Disable assign but still keep copy ctor, which is needed
993 load_partial_dies. */
994 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
996 /* Adjust the partial die before generating a symbol for it. This
997 function may set the is_external flag or change the DIE's
999 void fixup (struct dwarf2_cu
*cu
);
1001 /* Read a minimal amount of information into the minimal die
1003 const gdb_byte
*read (const struct die_reader_specs
*reader
,
1004 const struct abbrev_info
&abbrev
,
1005 const gdb_byte
*info_ptr
);
1007 /* Compute the name of this partial DIE. This memoizes the
1008 result, so it is safe to call multiple times. */
1009 const char *name (dwarf2_cu
*cu
);
1011 /* Offset of this DIE. */
1012 const sect_offset sect_off
;
1014 /* DWARF-2 tag for this DIE. */
1015 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1017 /* Assorted flags describing the data found in this DIE. */
1018 const unsigned int has_children
: 1;
1020 unsigned int is_external
: 1;
1021 unsigned int is_declaration
: 1;
1022 unsigned int has_type
: 1;
1023 unsigned int has_specification
: 1;
1024 unsigned int has_pc_info
: 1;
1025 unsigned int may_be_inlined
: 1;
1027 /* This DIE has been marked DW_AT_main_subprogram. */
1028 unsigned int main_subprogram
: 1;
1030 /* Flag set if the SCOPE field of this structure has been
1032 unsigned int scope_set
: 1;
1034 /* Flag set if the DIE has a byte_size attribute. */
1035 unsigned int has_byte_size
: 1;
1037 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1038 unsigned int has_const_value
: 1;
1040 /* Flag set if any of the DIE's children are template arguments. */
1041 unsigned int has_template_arguments
: 1;
1043 /* Flag set if fixup has been called on this die. */
1044 unsigned int fixup_called
: 1;
1046 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1047 unsigned int is_dwz
: 1;
1049 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1050 unsigned int spec_is_dwz
: 1;
1052 unsigned int canonical_name
: 1;
1054 /* The name of this DIE. Normally the value of DW_AT_name, but
1055 sometimes a default name for unnamed DIEs. */
1056 const char *raw_name
= nullptr;
1058 /* The linkage name, if present. */
1059 const char *linkage_name
= nullptr;
1061 /* The scope to prepend to our children. This is generally
1062 allocated on the comp_unit_obstack, so will disappear
1063 when this compilation unit leaves the cache. */
1064 const char *scope
= nullptr;
1066 /* Some data associated with the partial DIE. The tag determines
1067 which field is live. */
1070 /* The location description associated with this DIE, if any. */
1071 struct dwarf_block
*locdesc
;
1072 /* The offset of an import, for DW_TAG_imported_unit. */
1073 sect_offset sect_off
;
1076 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1077 CORE_ADDR lowpc
= 0;
1078 CORE_ADDR highpc
= 0;
1080 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1081 DW_AT_sibling, if any. */
1082 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1083 could return DW_AT_sibling values to its caller load_partial_dies. */
1084 const gdb_byte
*sibling
= nullptr;
1086 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1087 DW_AT_specification (or DW_AT_abstract_origin or
1088 DW_AT_extension). */
1089 sect_offset spec_offset
{};
1091 /* Pointers to this DIE's parent, first child, and next sibling,
1093 struct partial_die_info
*die_parent
= nullptr;
1094 struct partial_die_info
*die_child
= nullptr;
1095 struct partial_die_info
*die_sibling
= nullptr;
1097 friend struct partial_die_info
*
1098 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1101 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1102 partial_die_info (sect_offset sect_off
)
1103 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1107 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1109 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1114 has_specification
= 0;
1117 main_subprogram
= 0;
1120 has_const_value
= 0;
1121 has_template_arguments
= 0;
1129 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1130 but this would require a corresponding change in unpack_field_as_long
1132 static int bits_per_byte
= 8;
1134 struct variant_part_builder
;
1136 /* When reading a variant, we track a bit more information about the
1137 field, and store it in an object of this type. */
1139 struct variant_field
1141 int first_field
= -1;
1142 int last_field
= -1;
1144 /* A variant can contain other variant parts. */
1145 std::vector
<variant_part_builder
> variant_parts
;
1147 /* If we see a DW_TAG_variant, then this will be set if this is the
1149 bool default_branch
= false;
1150 /* If we see a DW_AT_discr_value, then this will be the discriminant
1152 ULONGEST discriminant_value
= 0;
1153 /* If we see a DW_AT_discr_list, then this is a pointer to the list
1155 struct dwarf_block
*discr_list_data
= nullptr;
1158 /* This represents a DW_TAG_variant_part. */
1160 struct variant_part_builder
1162 /* The offset of the discriminant field. */
1163 sect_offset discriminant_offset
{};
1165 /* Variants that are direct children of this variant part. */
1166 std::vector
<variant_field
> variants
;
1168 /* True if we're currently reading a variant. */
1169 bool processing_variant
= false;
1174 int accessibility
= 0;
1176 /* Variant parts need to find the discriminant, which is a DIE
1177 reference. We track the section offset of each field to make
1180 struct field field
{};
1185 const char *name
= nullptr;
1186 std::vector
<struct fn_field
> fnfields
;
1189 /* The routines that read and process dies for a C struct or C++ class
1190 pass lists of data member fields and lists of member function fields
1191 in an instance of a field_info structure, as defined below. */
1194 /* List of data member and baseclasses fields. */
1195 std::vector
<struct nextfield
> fields
;
1196 std::vector
<struct nextfield
> baseclasses
;
1198 /* Set if the accessibility of one of the fields is not public. */
1199 bool non_public_fields
= false;
1201 /* Member function fieldlist array, contains name of possibly overloaded
1202 member function, number of overloaded member functions and a pointer
1203 to the head of the member function field chain. */
1204 std::vector
<struct fnfieldlist
> fnfieldlists
;
1206 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1207 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1208 std::vector
<struct decl_field
> typedef_field_list
;
1210 /* Nested types defined by this class and the number of elements in this
1212 std::vector
<struct decl_field
> nested_types_list
;
1214 /* If non-null, this is the variant part we are currently
1216 variant_part_builder
*current_variant_part
= nullptr;
1217 /* This holds all the top-level variant parts attached to the type
1219 std::vector
<variant_part_builder
> variant_parts
;
1221 /* Return the total number of fields (including baseclasses). */
1222 int nfields () const
1224 return fields
.size () + baseclasses
.size ();
1228 /* Loaded secondary compilation units are kept in memory until they
1229 have not been referenced for the processing of this many
1230 compilation units. Set this to zero to disable caching. Cache
1231 sizes of up to at least twenty will improve startup time for
1232 typical inter-CU-reference binaries, at an obvious memory cost. */
1233 static int dwarf_max_cache_age
= 5;
1235 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1236 struct cmd_list_element
*c
, const char *value
)
1238 fprintf_filtered (file
, _("The upper bound on the age of cached "
1239 "DWARF compilation units is %s.\n"),
1243 /* local function prototypes */
1245 static void dwarf2_find_base_address (struct die_info
*die
,
1246 struct dwarf2_cu
*cu
);
1248 static dwarf2_psymtab
*create_partial_symtab
1249 (dwarf2_per_cu_data
*per_cu
, dwarf2_per_objfile
*per_objfile
,
1252 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1253 const gdb_byte
*info_ptr
,
1254 struct die_info
*type_unit_die
);
1256 static void dwarf2_build_psymtabs_hard (dwarf2_per_objfile
*per_objfile
);
1258 static void scan_partial_symbols (struct partial_die_info
*,
1259 CORE_ADDR
*, CORE_ADDR
*,
1260 int, struct dwarf2_cu
*);
1262 static void add_partial_symbol (struct partial_die_info
*,
1263 struct dwarf2_cu
*);
1265 static void add_partial_namespace (struct partial_die_info
*pdi
,
1266 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1267 int set_addrmap
, struct dwarf2_cu
*cu
);
1269 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1270 CORE_ADDR
*highpc
, int set_addrmap
,
1271 struct dwarf2_cu
*cu
);
1273 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1274 struct dwarf2_cu
*cu
);
1276 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1277 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1278 int need_pc
, struct dwarf2_cu
*cu
);
1280 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1282 static struct partial_die_info
*load_partial_dies
1283 (const struct die_reader_specs
*, const gdb_byte
*, int);
1285 /* A pair of partial_die_info and compilation unit. */
1286 struct cu_partial_die_info
1288 /* The compilation unit of the partial_die_info. */
1289 struct dwarf2_cu
*cu
;
1290 /* A partial_die_info. */
1291 struct partial_die_info
*pdi
;
1293 cu_partial_die_info (struct dwarf2_cu
*cu
, struct partial_die_info
*pdi
)
1299 cu_partial_die_info () = delete;
1302 static const struct cu_partial_die_info
find_partial_die (sect_offset
, int,
1303 struct dwarf2_cu
*);
1305 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1306 struct attribute
*, struct attr_abbrev
*,
1309 static void read_attribute_reprocess (const struct die_reader_specs
*reader
,
1310 struct attribute
*attr
, dwarf_tag tag
);
1312 static CORE_ADDR
read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
);
1314 static sect_offset
read_abbrev_offset (dwarf2_per_objfile
*per_objfile
,
1315 dwarf2_section_info
*, sect_offset
);
1317 static const char *read_indirect_string
1318 (dwarf2_per_objfile
*per_objfile
, bfd
*, const gdb_byte
*,
1319 const struct comp_unit_head
*, unsigned int *);
1321 static const char *read_indirect_string_at_offset
1322 (dwarf2_per_objfile
*per_objfile
, LONGEST str_offset
);
1324 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1328 static const char *read_dwo_str_index (const struct die_reader_specs
*reader
,
1329 ULONGEST str_index
);
1331 static const char *read_stub_str_index (struct dwarf2_cu
*cu
,
1332 ULONGEST str_index
);
1334 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1336 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1337 struct dwarf2_cu
*);
1339 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1340 struct dwarf2_cu
*cu
);
1342 static const char *dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
);
1344 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1345 struct dwarf2_cu
*cu
);
1347 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1349 static struct die_info
*die_specification (struct die_info
*die
,
1350 struct dwarf2_cu
**);
1352 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1353 struct dwarf2_cu
*cu
);
1355 static void dwarf_decode_lines (struct line_header
*, const char *,
1356 struct dwarf2_cu
*, dwarf2_psymtab
*,
1357 CORE_ADDR
, int decode_mapping
);
1359 static void dwarf2_start_subfile (struct dwarf2_cu
*, const char *,
1362 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1363 struct dwarf2_cu
*, struct symbol
* = NULL
);
1365 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1366 struct dwarf2_cu
*);
1368 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1371 struct obstack
*obstack
,
1372 struct dwarf2_cu
*cu
, LONGEST
*value
,
1373 const gdb_byte
**bytes
,
1374 struct dwarf2_locexpr_baton
**baton
);
1376 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1378 static int need_gnat_info (struct dwarf2_cu
*);
1380 static struct type
*die_descriptive_type (struct die_info
*,
1381 struct dwarf2_cu
*);
1383 static void set_descriptive_type (struct type
*, struct die_info
*,
1384 struct dwarf2_cu
*);
1386 static struct type
*die_containing_type (struct die_info
*,
1387 struct dwarf2_cu
*);
1389 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1390 struct dwarf2_cu
*);
1392 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1394 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1396 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1398 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1399 const char *suffix
, int physname
,
1400 struct dwarf2_cu
*cu
);
1402 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1404 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1406 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1408 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1410 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1412 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1414 /* Return the .debug_loclists section to use for cu. */
1415 static struct dwarf2_section_info
*cu_debug_loc_section (struct dwarf2_cu
*cu
);
1417 /* Return the .debug_rnglists section to use for cu. */
1418 static struct dwarf2_section_info
*cu_debug_rnglists_section
1419 (struct dwarf2_cu
*cu
, dwarf_tag tag
);
1421 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1422 values. Keep the items ordered with increasing constraints compliance. */
1425 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1426 PC_BOUNDS_NOT_PRESENT
,
1428 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1429 were present but they do not form a valid range of PC addresses. */
1432 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1435 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1439 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1440 CORE_ADDR
*, CORE_ADDR
*,
1444 static void get_scope_pc_bounds (struct die_info
*,
1445 CORE_ADDR
*, CORE_ADDR
*,
1446 struct dwarf2_cu
*);
1448 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1449 CORE_ADDR
, struct dwarf2_cu
*);
1451 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1452 struct dwarf2_cu
*);
1454 static void dwarf2_attach_fields_to_type (struct field_info
*,
1455 struct type
*, struct dwarf2_cu
*);
1457 static void dwarf2_add_member_fn (struct field_info
*,
1458 struct die_info
*, struct type
*,
1459 struct dwarf2_cu
*);
1461 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1463 struct dwarf2_cu
*);
1465 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1467 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1469 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1471 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1473 static struct using_direct
**using_directives (struct dwarf2_cu
*cu
);
1475 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1477 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1479 static struct type
*read_module_type (struct die_info
*die
,
1480 struct dwarf2_cu
*cu
);
1482 static const char *namespace_name (struct die_info
*die
,
1483 int *is_anonymous
, struct dwarf2_cu
*);
1485 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1487 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*,
1490 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1491 struct dwarf2_cu
*);
1493 static struct die_info
*read_die_and_siblings_1
1494 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1497 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1498 const gdb_byte
*info_ptr
,
1499 const gdb_byte
**new_info_ptr
,
1500 struct die_info
*parent
);
1502 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1503 struct die_info
**, const gdb_byte
*,
1506 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1507 struct die_info
**, const gdb_byte
*);
1509 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1511 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1514 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1516 static const char *dwarf2_full_name (const char *name
,
1517 struct die_info
*die
,
1518 struct dwarf2_cu
*cu
);
1520 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1521 struct dwarf2_cu
*cu
);
1523 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1524 struct dwarf2_cu
**);
1526 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1528 static void dump_die_for_error (struct die_info
*);
1530 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1533 /*static*/ void dump_die (struct die_info
*, int max_level
);
1535 static void store_in_ref_table (struct die_info
*,
1536 struct dwarf2_cu
*);
1538 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1539 const struct attribute
*,
1540 struct dwarf2_cu
**);
1542 static struct die_info
*follow_die_ref (struct die_info
*,
1543 const struct attribute
*,
1544 struct dwarf2_cu
**);
1546 static struct die_info
*follow_die_sig (struct die_info
*,
1547 const struct attribute
*,
1548 struct dwarf2_cu
**);
1550 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1551 struct dwarf2_cu
*);
1553 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1554 const struct attribute
*,
1555 struct dwarf2_cu
*);
1557 static void load_full_type_unit (dwarf2_per_cu_data
*per_cu
,
1558 dwarf2_per_objfile
*per_objfile
);
1560 static void read_signatured_type (signatured_type
*sig_type
,
1561 dwarf2_per_objfile
*per_objfile
);
1563 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1564 struct die_info
*die
, struct dwarf2_cu
*cu
,
1565 struct dynamic_prop
*prop
, struct type
*type
);
1567 /* memory allocation interface */
1569 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1571 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1573 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1575 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1576 struct dwarf2_loclist_baton
*baton
,
1577 const struct attribute
*attr
);
1579 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1581 struct dwarf2_cu
*cu
,
1584 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1585 const gdb_byte
*info_ptr
,
1586 struct abbrev_info
*abbrev
);
1588 static hashval_t
partial_die_hash (const void *item
);
1590 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1592 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1593 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1594 dwarf2_per_objfile
*per_objfile
);
1596 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1597 struct die_info
*comp_unit_die
,
1598 enum language pretend_language
);
1600 static struct type
*set_die_type (struct die_info
*, struct type
*,
1601 struct dwarf2_cu
*);
1603 static void create_all_comp_units (dwarf2_per_objfile
*per_objfile
);
1605 static int create_all_type_units (dwarf2_per_objfile
*per_objfile
);
1607 static void load_full_comp_unit (dwarf2_per_cu_data
*per_cu
,
1608 dwarf2_per_objfile
*per_objfile
,
1610 enum language pretend_language
);
1612 static void process_full_comp_unit (dwarf2_cu
*cu
,
1613 enum language pretend_language
);
1615 static void process_full_type_unit (dwarf2_cu
*cu
,
1616 enum language pretend_language
);
1618 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1619 struct dwarf2_per_cu_data
*);
1621 static void dwarf2_mark (struct dwarf2_cu
*);
1623 static struct type
*get_die_type_at_offset (sect_offset
,
1624 dwarf2_per_cu_data
*per_cu
,
1625 dwarf2_per_objfile
*per_objfile
);
1627 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1629 static void queue_comp_unit (dwarf2_per_cu_data
*per_cu
,
1630 dwarf2_per_objfile
*per_objfile
,
1631 enum language pretend_language
);
1633 static void process_queue (dwarf2_per_objfile
*per_objfile
);
1635 /* Class, the destructor of which frees all allocated queue entries. This
1636 will only have work to do if an error was thrown while processing the
1637 dwarf. If no error was thrown then the queue entries should have all
1638 been processed, and freed, as we went along. */
1640 class dwarf2_queue_guard
1643 explicit dwarf2_queue_guard (dwarf2_per_objfile
*per_objfile
)
1644 : m_per_objfile (per_objfile
)
1648 /* Free any entries remaining on the queue. There should only be
1649 entries left if we hit an error while processing the dwarf. */
1650 ~dwarf2_queue_guard ()
1652 /* Ensure that no memory is allocated by the queue. */
1653 std::queue
<dwarf2_queue_item
> empty
;
1654 std::swap (m_per_objfile
->per_bfd
->queue
, empty
);
1657 DISABLE_COPY_AND_ASSIGN (dwarf2_queue_guard
);
1660 dwarf2_per_objfile
*m_per_objfile
;
1663 dwarf2_queue_item::~dwarf2_queue_item ()
1665 /* Anything still marked queued is likely to be in an
1666 inconsistent state, so discard it. */
1669 per_objfile
->remove_cu (per_cu
);
1674 /* The return type of find_file_and_directory. Note, the enclosed
1675 string pointers are only valid while this object is valid. */
1677 struct file_and_directory
1679 /* The filename. This is never NULL. */
1682 /* The compilation directory. NULL if not known. If we needed to
1683 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1684 points directly to the DW_AT_comp_dir string attribute owned by
1685 the obstack that owns the DIE. */
1686 const char *comp_dir
;
1688 /* If we needed to build a new string for comp_dir, this is what
1689 owns the storage. */
1690 std::string comp_dir_storage
;
1693 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1694 struct dwarf2_cu
*cu
);
1696 static htab_up
allocate_signatured_type_table ();
1698 static htab_up
allocate_dwo_unit_table ();
1700 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1701 (dwarf2_per_objfile
*per_objfile
, struct dwp_file
*dwp_file
,
1702 const char *comp_dir
, ULONGEST signature
, int is_debug_types
);
1704 static struct dwp_file
*get_dwp_file (dwarf2_per_objfile
*per_objfile
);
1706 static struct dwo_unit
*lookup_dwo_comp_unit
1707 (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
,
1708 ULONGEST signature
);
1710 static struct dwo_unit
*lookup_dwo_type_unit
1711 (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
);
1713 static void queue_and_load_all_dwo_tus (dwarf2_cu
*cu
);
1715 /* A unique pointer to a dwo_file. */
1717 typedef std::unique_ptr
<struct dwo_file
> dwo_file_up
;
1719 static void process_cu_includes (dwarf2_per_objfile
*per_objfile
);
1721 static void check_producer (struct dwarf2_cu
*cu
);
1723 static void free_line_header_voidp (void *arg
);
1725 /* Various complaints about symbol reading that don't abort the process. */
1728 dwarf2_debug_line_missing_file_complaint (void)
1730 complaint (_(".debug_line section has line data without a file"));
1734 dwarf2_debug_line_missing_end_sequence_complaint (void)
1736 complaint (_(".debug_line section has line "
1737 "program sequence without an end"));
1741 dwarf2_complex_location_expr_complaint (void)
1743 complaint (_("location expression too complex"));
1747 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
1750 complaint (_("const value length mismatch for '%s', got %d, expected %d"),
1755 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
1757 complaint (_("invalid attribute class or form for '%s' in '%s'"),
1761 /* Hash function for line_header_hash. */
1764 line_header_hash (const struct line_header
*ofs
)
1766 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
1769 /* Hash function for htab_create_alloc_ex for line_header_hash. */
1772 line_header_hash_voidp (const void *item
)
1774 const struct line_header
*ofs
= (const struct line_header
*) item
;
1776 return line_header_hash (ofs
);
1779 /* Equality function for line_header_hash. */
1782 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
1784 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
1785 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
1787 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
1788 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
1793 /* See declaration. */
1795 dwarf2_per_bfd::dwarf2_per_bfd (bfd
*obfd
, const dwarf2_debug_sections
*names
,
1798 can_copy (can_copy_
)
1801 names
= &dwarf2_elf_names
;
1803 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
1804 locate_sections (obfd
, sec
, *names
);
1807 dwarf2_per_bfd::~dwarf2_per_bfd ()
1809 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
1810 per_cu
->imported_symtabs_free ();
1812 for (signatured_type
*sig_type
: all_type_units
)
1813 sig_type
->per_cu
.imported_symtabs_free ();
1815 /* Everything else should be on this->obstack. */
1821 dwarf2_per_objfile::remove_all_cus ()
1823 for (auto pair
: m_dwarf2_cus
)
1826 m_dwarf2_cus
.clear ();
1829 /* A helper class that calls free_cached_comp_units on
1832 class free_cached_comp_units
1836 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
1837 : m_per_objfile (per_objfile
)
1841 ~free_cached_comp_units ()
1843 m_per_objfile
->remove_all_cus ();
1846 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
1850 dwarf2_per_objfile
*m_per_objfile
;
1856 dwarf2_per_objfile::symtab_set_p (const dwarf2_per_cu_data
*per_cu
) const
1858 gdb_assert (per_cu
->index
< this->m_symtabs
.size ());
1860 return this->m_symtabs
[per_cu
->index
] != nullptr;
1866 dwarf2_per_objfile::get_symtab (const dwarf2_per_cu_data
*per_cu
) const
1868 gdb_assert (per_cu
->index
< this->m_symtabs
.size ());
1870 return this->m_symtabs
[per_cu
->index
];
1876 dwarf2_per_objfile::set_symtab (const dwarf2_per_cu_data
*per_cu
,
1877 compunit_symtab
*symtab
)
1879 gdb_assert (per_cu
->index
< this->m_symtabs
.size ());
1880 gdb_assert (this->m_symtabs
[per_cu
->index
] == nullptr);
1882 this->m_symtabs
[per_cu
->index
] = symtab
;
1885 /* Try to locate the sections we need for DWARF 2 debugging
1886 information and return true if we have enough to do something.
1887 NAMES points to the dwarf2 section names, or is NULL if the standard
1888 ELF names are used. CAN_COPY is true for formats where symbol
1889 interposition is possible and so symbol values must follow copy
1890 relocation rules. */
1893 dwarf2_has_info (struct objfile
*objfile
,
1894 const struct dwarf2_debug_sections
*names
,
1897 if (objfile
->flags
& OBJF_READNEVER
)
1900 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
1902 if (per_objfile
== NULL
)
1904 dwarf2_per_bfd
*per_bfd
;
1906 /* We can share a "dwarf2_per_bfd" with other objfiles if the BFD
1907 doesn't require relocations and if there aren't partial symbols
1908 from some other reader. */
1909 if (!objfile_has_partial_symbols (objfile
)
1910 && !gdb_bfd_requires_relocations (objfile
->obfd
))
1912 /* See if one has been created for this BFD yet. */
1913 per_bfd
= dwarf2_per_bfd_bfd_data_key
.get (objfile
->obfd
);
1915 if (per_bfd
== nullptr)
1917 /* No, create it now. */
1918 per_bfd
= new dwarf2_per_bfd (objfile
->obfd
, names
, can_copy
);
1919 dwarf2_per_bfd_bfd_data_key
.set (objfile
->obfd
, per_bfd
);
1924 /* No sharing possible, create one specifically for this objfile. */
1925 per_bfd
= new dwarf2_per_bfd (objfile
->obfd
, names
, can_copy
);
1926 dwarf2_per_bfd_objfile_data_key
.set (objfile
, per_bfd
);
1929 per_objfile
= dwarf2_objfile_data_key
.emplace (objfile
, objfile
, per_bfd
);
1932 return (!per_objfile
->per_bfd
->info
.is_virtual
1933 && per_objfile
->per_bfd
->info
.s
.section
!= NULL
1934 && !per_objfile
->per_bfd
->abbrev
.is_virtual
1935 && per_objfile
->per_bfd
->abbrev
.s
.section
!= NULL
);
1938 /* When loading sections, we look either for uncompressed section or for
1939 compressed section names. */
1942 section_is_p (const char *section_name
,
1943 const struct dwarf2_section_names
*names
)
1945 if (names
->normal
!= NULL
1946 && strcmp (section_name
, names
->normal
) == 0)
1948 if (names
->compressed
!= NULL
1949 && strcmp (section_name
, names
->compressed
) == 0)
1954 /* See declaration. */
1957 dwarf2_per_bfd::locate_sections (bfd
*abfd
, asection
*sectp
,
1958 const dwarf2_debug_sections
&names
)
1960 flagword aflag
= bfd_section_flags (sectp
);
1962 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
1965 else if (elf_section_data (sectp
)->this_hdr
.sh_size
1966 > bfd_get_file_size (abfd
))
1968 bfd_size_type size
= elf_section_data (sectp
)->this_hdr
.sh_size
;
1969 warning (_("Discarding section %s which has a section size (%s"
1970 ") larger than the file size [in module %s]"),
1971 bfd_section_name (sectp
), phex_nz (size
, sizeof (size
)),
1972 bfd_get_filename (abfd
));
1974 else if (section_is_p (sectp
->name
, &names
.info
))
1976 this->info
.s
.section
= sectp
;
1977 this->info
.size
= bfd_section_size (sectp
);
1979 else if (section_is_p (sectp
->name
, &names
.abbrev
))
1981 this->abbrev
.s
.section
= sectp
;
1982 this->abbrev
.size
= bfd_section_size (sectp
);
1984 else if (section_is_p (sectp
->name
, &names
.line
))
1986 this->line
.s
.section
= sectp
;
1987 this->line
.size
= bfd_section_size (sectp
);
1989 else if (section_is_p (sectp
->name
, &names
.loc
))
1991 this->loc
.s
.section
= sectp
;
1992 this->loc
.size
= bfd_section_size (sectp
);
1994 else if (section_is_p (sectp
->name
, &names
.loclists
))
1996 this->loclists
.s
.section
= sectp
;
1997 this->loclists
.size
= bfd_section_size (sectp
);
1999 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2001 this->macinfo
.s
.section
= sectp
;
2002 this->macinfo
.size
= bfd_section_size (sectp
);
2004 else if (section_is_p (sectp
->name
, &names
.macro
))
2006 this->macro
.s
.section
= sectp
;
2007 this->macro
.size
= bfd_section_size (sectp
);
2009 else if (section_is_p (sectp
->name
, &names
.str
))
2011 this->str
.s
.section
= sectp
;
2012 this->str
.size
= bfd_section_size (sectp
);
2014 else if (section_is_p (sectp
->name
, &names
.str_offsets
))
2016 this->str_offsets
.s
.section
= sectp
;
2017 this->str_offsets
.size
= bfd_section_size (sectp
);
2019 else if (section_is_p (sectp
->name
, &names
.line_str
))
2021 this->line_str
.s
.section
= sectp
;
2022 this->line_str
.size
= bfd_section_size (sectp
);
2024 else if (section_is_p (sectp
->name
, &names
.addr
))
2026 this->addr
.s
.section
= sectp
;
2027 this->addr
.size
= bfd_section_size (sectp
);
2029 else if (section_is_p (sectp
->name
, &names
.frame
))
2031 this->frame
.s
.section
= sectp
;
2032 this->frame
.size
= bfd_section_size (sectp
);
2034 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2036 this->eh_frame
.s
.section
= sectp
;
2037 this->eh_frame
.size
= bfd_section_size (sectp
);
2039 else if (section_is_p (sectp
->name
, &names
.ranges
))
2041 this->ranges
.s
.section
= sectp
;
2042 this->ranges
.size
= bfd_section_size (sectp
);
2044 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2046 this->rnglists
.s
.section
= sectp
;
2047 this->rnglists
.size
= bfd_section_size (sectp
);
2049 else if (section_is_p (sectp
->name
, &names
.types
))
2051 struct dwarf2_section_info type_section
;
2053 memset (&type_section
, 0, sizeof (type_section
));
2054 type_section
.s
.section
= sectp
;
2055 type_section
.size
= bfd_section_size (sectp
);
2057 this->types
.push_back (type_section
);
2059 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2061 this->gdb_index
.s
.section
= sectp
;
2062 this->gdb_index
.size
= bfd_section_size (sectp
);
2064 else if (section_is_p (sectp
->name
, &names
.debug_names
))
2066 this->debug_names
.s
.section
= sectp
;
2067 this->debug_names
.size
= bfd_section_size (sectp
);
2069 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
2071 this->debug_aranges
.s
.section
= sectp
;
2072 this->debug_aranges
.size
= bfd_section_size (sectp
);
2075 if ((bfd_section_flags (sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2076 && bfd_section_vma (sectp
) == 0)
2077 this->has_section_at_zero
= true;
2080 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2084 dwarf2_get_section_info (struct objfile
*objfile
,
2085 enum dwarf2_section_enum sect
,
2086 asection
**sectp
, const gdb_byte
**bufp
,
2087 bfd_size_type
*sizep
)
2089 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
2090 struct dwarf2_section_info
*info
;
2092 /* We may see an objfile without any DWARF, in which case we just
2094 if (per_objfile
== NULL
)
2103 case DWARF2_DEBUG_FRAME
:
2104 info
= &per_objfile
->per_bfd
->frame
;
2106 case DWARF2_EH_FRAME
:
2107 info
= &per_objfile
->per_bfd
->eh_frame
;
2110 gdb_assert_not_reached ("unexpected section");
2113 info
->read (objfile
);
2115 *sectp
= info
->get_bfd_section ();
2116 *bufp
= info
->buffer
;
2117 *sizep
= info
->size
;
2120 /* A helper function to find the sections for a .dwz file. */
2123 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, dwz_file
*dwz_file
)
2125 /* Note that we only support the standard ELF names, because .dwz
2126 is ELF-only (at the time of writing). */
2127 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2129 dwz_file
->abbrev
.s
.section
= sectp
;
2130 dwz_file
->abbrev
.size
= bfd_section_size (sectp
);
2132 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2134 dwz_file
->info
.s
.section
= sectp
;
2135 dwz_file
->info
.size
= bfd_section_size (sectp
);
2137 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2139 dwz_file
->str
.s
.section
= sectp
;
2140 dwz_file
->str
.size
= bfd_section_size (sectp
);
2142 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2144 dwz_file
->line
.s
.section
= sectp
;
2145 dwz_file
->line
.size
= bfd_section_size (sectp
);
2147 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2149 dwz_file
->macro
.s
.section
= sectp
;
2150 dwz_file
->macro
.size
= bfd_section_size (sectp
);
2152 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2154 dwz_file
->gdb_index
.s
.section
= sectp
;
2155 dwz_file
->gdb_index
.size
= bfd_section_size (sectp
);
2157 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2159 dwz_file
->debug_names
.s
.section
= sectp
;
2160 dwz_file
->debug_names
.size
= bfd_section_size (sectp
);
2164 /* See dwarf2read.h. */
2167 dwarf2_get_dwz_file (dwarf2_per_bfd
*per_bfd
)
2169 const char *filename
;
2170 bfd_size_type buildid_len_arg
;
2174 if (per_bfd
->dwz_file
!= NULL
)
2175 return per_bfd
->dwz_file
.get ();
2177 bfd_set_error (bfd_error_no_error
);
2178 gdb::unique_xmalloc_ptr
<char> data
2179 (bfd_get_alt_debug_link_info (per_bfd
->obfd
,
2180 &buildid_len_arg
, &buildid
));
2183 if (bfd_get_error () == bfd_error_no_error
)
2185 error (_("could not read '.gnu_debugaltlink' section: %s"),
2186 bfd_errmsg (bfd_get_error ()));
2189 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2191 buildid_len
= (size_t) buildid_len_arg
;
2193 filename
= data
.get ();
2195 std::string abs_storage
;
2196 if (!IS_ABSOLUTE_PATH (filename
))
2198 gdb::unique_xmalloc_ptr
<char> abs
2199 = gdb_realpath (bfd_get_filename (per_bfd
->obfd
));
2201 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2202 filename
= abs_storage
.c_str ();
2205 /* First try the file name given in the section. If that doesn't
2206 work, try to use the build-id instead. */
2207 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
));
2208 if (dwz_bfd
!= NULL
)
2210 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2211 dwz_bfd
.reset (nullptr);
2214 if (dwz_bfd
== NULL
)
2215 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2217 if (dwz_bfd
== nullptr)
2219 gdb::unique_xmalloc_ptr
<char> alt_filename
;
2220 const char *origname
= bfd_get_filename (per_bfd
->obfd
);
2222 scoped_fd
fd (debuginfod_debuginfo_query (buildid
,
2229 /* File successfully retrieved from server. */
2230 dwz_bfd
= gdb_bfd_open (alt_filename
.get (), gnutarget
);
2232 if (dwz_bfd
== nullptr)
2233 warning (_("File \"%s\" from debuginfod cannot be opened as bfd"),
2234 alt_filename
.get ());
2235 else if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2236 dwz_bfd
.reset (nullptr);
2240 if (dwz_bfd
== NULL
)
2241 error (_("could not find '.gnu_debugaltlink' file for %s"),
2242 bfd_get_filename (per_bfd
->obfd
));
2244 std::unique_ptr
<struct dwz_file
> result
2245 (new struct dwz_file (std::move (dwz_bfd
)));
2247 for (asection
*sec
: gdb_bfd_sections (result
->dwz_bfd
))
2248 locate_dwz_sections (result
->dwz_bfd
.get (), sec
, result
.get ());
2250 gdb_bfd_record_inclusion (per_bfd
->obfd
, result
->dwz_bfd
.get ());
2251 per_bfd
->dwz_file
= std::move (result
);
2252 return per_bfd
->dwz_file
.get ();
2255 /* DWARF quick_symbols_functions support. */
2257 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2258 unique line tables, so we maintain a separate table of all .debug_line
2259 derived entries to support the sharing.
2260 All the quick functions need is the list of file names. We discard the
2261 line_header when we're done and don't need to record it here. */
2262 struct quick_file_names
2264 /* The data used to construct the hash key. */
2265 struct stmt_list_hash hash
;
2267 /* The number of entries in file_names, real_names. */
2268 unsigned int num_file_names
;
2270 /* The file names from the line table, after being run through
2272 const char **file_names
;
2274 /* The file names from the line table after being run through
2275 gdb_realpath. These are computed lazily. */
2276 const char **real_names
;
2279 /* When using the index (and thus not using psymtabs), each CU has an
2280 object of this type. This is used to hold information needed by
2281 the various "quick" methods. */
2282 struct dwarf2_per_cu_quick_data
2284 /* The file table. This can be NULL if there was no file table
2285 or it's currently not read in.
2286 NOTE: This points into dwarf2_per_objfile->per_bfd->quick_file_names_table. */
2287 struct quick_file_names
*file_names
;
2289 /* A temporary mark bit used when iterating over all CUs in
2290 expand_symtabs_matching. */
2291 unsigned int mark
: 1;
2293 /* True if we've tried to read the file table and found there isn't one.
2294 There will be no point in trying to read it again next time. */
2295 unsigned int no_file_data
: 1;
2298 /* Utility hash function for a stmt_list_hash. */
2301 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2305 if (stmt_list_hash
->dwo_unit
!= NULL
)
2306 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2307 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2311 /* Utility equality function for a stmt_list_hash. */
2314 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2315 const struct stmt_list_hash
*rhs
)
2317 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2319 if (lhs
->dwo_unit
!= NULL
2320 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2323 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2326 /* Hash function for a quick_file_names. */
2329 hash_file_name_entry (const void *e
)
2331 const struct quick_file_names
*file_data
2332 = (const struct quick_file_names
*) e
;
2334 return hash_stmt_list_entry (&file_data
->hash
);
2337 /* Equality function for a quick_file_names. */
2340 eq_file_name_entry (const void *a
, const void *b
)
2342 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2343 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2345 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2348 /* Delete function for a quick_file_names. */
2351 delete_file_name_entry (void *e
)
2353 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2356 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2358 xfree ((void*) file_data
->file_names
[i
]);
2359 if (file_data
->real_names
)
2360 xfree ((void*) file_data
->real_names
[i
]);
2363 /* The space for the struct itself lives on the obstack, so we don't
2367 /* Create a quick_file_names hash table. */
2370 create_quick_file_names_table (unsigned int nr_initial_entries
)
2372 return htab_up (htab_create_alloc (nr_initial_entries
,
2373 hash_file_name_entry
, eq_file_name_entry
,
2374 delete_file_name_entry
, xcalloc
, xfree
));
2377 /* Read in CU (dwarf2_cu object) for PER_CU in the context of PER_OBJFILE. This
2378 function is unrelated to symtabs, symtab would have to be created afterwards.
2379 You should call age_cached_comp_units after processing the CU. */
2382 load_cu (dwarf2_per_cu_data
*per_cu
, dwarf2_per_objfile
*per_objfile
,
2385 if (per_cu
->is_debug_types
)
2386 load_full_type_unit (per_cu
, per_objfile
);
2388 load_full_comp_unit (per_cu
, per_objfile
, skip_partial
, language_minimal
);
2390 dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
2392 return nullptr; /* Dummy CU. */
2394 dwarf2_find_base_address (cu
->dies
, cu
);
2399 /* Read in the symbols for PER_CU in the context of DWARF"_PER_OBJFILE. */
2402 dw2_do_instantiate_symtab (dwarf2_per_cu_data
*per_cu
,
2403 dwarf2_per_objfile
*per_objfile
, bool skip_partial
)
2405 /* Skip type_unit_groups, reading the type units they contain
2406 is handled elsewhere. */
2407 if (per_cu
->type_unit_group_p ())
2410 /* The destructor of dwarf2_queue_guard frees any entries left on
2411 the queue. After this point we're guaranteed to leave this function
2412 with the dwarf queue empty. */
2413 dwarf2_queue_guard
q_guard (dwarf2_per_objfile
);
2415 if (!per_objfile
->symtab_set_p (per_cu
))
2417 queue_comp_unit (per_cu
, per_objfile
, language_minimal
);
2418 dwarf2_cu
*cu
= load_cu (per_cu
, per_objfile
, skip_partial
);
2420 /* If we just loaded a CU from a DWO, and we're working with an index
2421 that may badly handle TUs, load all the TUs in that DWO as well.
2422 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2423 if (!per_cu
->is_debug_types
2425 && cu
->dwo_unit
!= NULL
2426 && per_objfile
->per_bfd
->index_table
!= NULL
2427 && per_objfile
->per_bfd
->index_table
->version
<= 7
2428 /* DWP files aren't supported yet. */
2429 && get_dwp_file (per_objfile
) == NULL
)
2430 queue_and_load_all_dwo_tus (cu
);
2433 process_queue (per_objfile
);
2435 /* Age the cache, releasing compilation units that have not
2436 been used recently. */
2437 per_objfile
->age_comp_units ();
2440 /* Ensure that the symbols for PER_CU have been read in. DWARF2_PER_OBJFILE is
2441 the per-objfile for which this symtab is instantiated.
2443 Returns the resulting symbol table. */
2445 static struct compunit_symtab
*
2446 dw2_instantiate_symtab (dwarf2_per_cu_data
*per_cu
,
2447 dwarf2_per_objfile
*per_objfile
,
2450 gdb_assert (per_objfile
->per_bfd
->using_index
);
2452 if (!per_objfile
->symtab_set_p (per_cu
))
2454 free_cached_comp_units
freer (per_objfile
);
2455 scoped_restore decrementer
= increment_reading_symtab ();
2456 dw2_do_instantiate_symtab (per_cu
, per_objfile
, skip_partial
);
2457 process_cu_includes (per_objfile
);
2460 return per_objfile
->get_symtab (per_cu
);
2463 /* See declaration. */
2465 dwarf2_per_cu_data
*
2466 dwarf2_per_bfd::get_cutu (int index
)
2468 if (index
>= this->all_comp_units
.size ())
2470 index
-= this->all_comp_units
.size ();
2471 gdb_assert (index
< this->all_type_units
.size ());
2472 return &this->all_type_units
[index
]->per_cu
;
2475 return this->all_comp_units
[index
];
2478 /* See declaration. */
2480 dwarf2_per_cu_data
*
2481 dwarf2_per_bfd::get_cu (int index
)
2483 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2485 return this->all_comp_units
[index
];
2488 /* See declaration. */
2491 dwarf2_per_bfd::get_tu (int index
)
2493 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2495 return this->all_type_units
[index
];
2500 dwarf2_per_cu_data
*
2501 dwarf2_per_bfd::allocate_per_cu ()
2503 dwarf2_per_cu_data
*result
= OBSTACK_ZALLOC (&obstack
, dwarf2_per_cu_data
);
2504 result
->per_bfd
= this;
2505 result
->index
= m_num_psymtabs
++;
2512 dwarf2_per_bfd::allocate_signatured_type ()
2514 signatured_type
*result
= OBSTACK_ZALLOC (&obstack
, signatured_type
);
2515 result
->per_cu
.per_bfd
= this;
2516 result
->per_cu
.index
= m_num_psymtabs
++;
2520 /* Return a new dwarf2_per_cu_data allocated on the per-bfd
2521 obstack, and constructed with the specified field values. */
2523 static dwarf2_per_cu_data
*
2524 create_cu_from_index_list (dwarf2_per_bfd
*per_bfd
,
2525 struct dwarf2_section_info
*section
,
2527 sect_offset sect_off
, ULONGEST length
)
2529 dwarf2_per_cu_data
*the_cu
= per_bfd
->allocate_per_cu ();
2530 the_cu
->sect_off
= sect_off
;
2531 the_cu
->length
= length
;
2532 the_cu
->section
= section
;
2533 the_cu
->v
.quick
= OBSTACK_ZALLOC (&per_bfd
->obstack
,
2534 struct dwarf2_per_cu_quick_data
);
2535 the_cu
->is_dwz
= is_dwz
;
2539 /* A helper for create_cus_from_index that handles a given list of
2543 create_cus_from_index_list (dwarf2_per_bfd
*per_bfd
,
2544 const gdb_byte
*cu_list
, offset_type n_elements
,
2545 struct dwarf2_section_info
*section
,
2548 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2550 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2552 sect_offset sect_off
2553 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2554 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2557 dwarf2_per_cu_data
*per_cu
2558 = create_cu_from_index_list (per_bfd
, section
, is_dwz
, sect_off
,
2560 per_bfd
->all_comp_units
.push_back (per_cu
);
2564 /* Read the CU list from the mapped index, and use it to create all
2565 the CU objects for PER_BFD. */
2568 create_cus_from_index (dwarf2_per_bfd
*per_bfd
,
2569 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
2570 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
2572 gdb_assert (per_bfd
->all_comp_units
.empty ());
2573 per_bfd
->all_comp_units
.reserve ((cu_list_elements
+ dwz_elements
) / 2);
2575 create_cus_from_index_list (per_bfd
, cu_list
, cu_list_elements
,
2578 if (dwz_elements
== 0)
2581 dwz_file
*dwz
= dwarf2_get_dwz_file (per_bfd
);
2582 create_cus_from_index_list (per_bfd
, dwz_list
, dwz_elements
,
2586 /* Create the signatured type hash table from the index. */
2589 create_signatured_type_table_from_index
2590 (dwarf2_per_bfd
*per_bfd
, struct dwarf2_section_info
*section
,
2591 const gdb_byte
*bytes
, offset_type elements
)
2593 gdb_assert (per_bfd
->all_type_units
.empty ());
2594 per_bfd
->all_type_units
.reserve (elements
/ 3);
2596 htab_up sig_types_hash
= allocate_signatured_type_table ();
2598 for (offset_type i
= 0; i
< elements
; i
+= 3)
2600 struct signatured_type
*sig_type
;
2603 cu_offset type_offset_in_tu
;
2605 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2606 sect_offset sect_off
2607 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
2609 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
2611 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
2614 sig_type
= per_bfd
->allocate_signatured_type ();
2615 sig_type
->signature
= signature
;
2616 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
2617 sig_type
->per_cu
.is_debug_types
= 1;
2618 sig_type
->per_cu
.section
= section
;
2619 sig_type
->per_cu
.sect_off
= sect_off
;
2620 sig_type
->per_cu
.v
.quick
2621 = OBSTACK_ZALLOC (&per_bfd
->obstack
,
2622 struct dwarf2_per_cu_quick_data
);
2624 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2627 per_bfd
->all_type_units
.push_back (sig_type
);
2630 per_bfd
->signatured_types
= std::move (sig_types_hash
);
2633 /* Create the signatured type hash table from .debug_names. */
2636 create_signatured_type_table_from_debug_names
2637 (dwarf2_per_objfile
*per_objfile
,
2638 const mapped_debug_names
&map
,
2639 struct dwarf2_section_info
*section
,
2640 struct dwarf2_section_info
*abbrev_section
)
2642 struct objfile
*objfile
= per_objfile
->objfile
;
2644 section
->read (objfile
);
2645 abbrev_section
->read (objfile
);
2647 gdb_assert (per_objfile
->per_bfd
->all_type_units
.empty ());
2648 per_objfile
->per_bfd
->all_type_units
.reserve (map
.tu_count
);
2650 htab_up sig_types_hash
= allocate_signatured_type_table ();
2652 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
2654 struct signatured_type
*sig_type
;
2657 sect_offset sect_off
2658 = (sect_offset
) (extract_unsigned_integer
2659 (map
.tu_table_reordered
+ i
* map
.offset_size
,
2661 map
.dwarf5_byte_order
));
2663 comp_unit_head cu_header
;
2664 read_and_check_comp_unit_head (per_objfile
, &cu_header
, section
,
2666 section
->buffer
+ to_underlying (sect_off
),
2669 sig_type
= per_objfile
->per_bfd
->allocate_signatured_type ();
2670 sig_type
->signature
= cu_header
.signature
;
2671 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
2672 sig_type
->per_cu
.is_debug_types
= 1;
2673 sig_type
->per_cu
.section
= section
;
2674 sig_type
->per_cu
.sect_off
= sect_off
;
2675 sig_type
->per_cu
.v
.quick
2676 = OBSTACK_ZALLOC (&per_objfile
->per_bfd
->obstack
,
2677 struct dwarf2_per_cu_quick_data
);
2679 slot
= htab_find_slot (sig_types_hash
.get (), sig_type
, INSERT
);
2682 per_objfile
->per_bfd
->all_type_units
.push_back (sig_type
);
2685 per_objfile
->per_bfd
->signatured_types
= std::move (sig_types_hash
);
2688 /* Read the address map data from the mapped index, and use it to
2689 populate the objfile's psymtabs_addrmap. */
2692 create_addrmap_from_index (dwarf2_per_objfile
*per_objfile
,
2693 struct mapped_index
*index
)
2695 struct objfile
*objfile
= per_objfile
->objfile
;
2696 struct gdbarch
*gdbarch
= objfile
->arch ();
2697 const gdb_byte
*iter
, *end
;
2698 struct addrmap
*mutable_map
;
2701 auto_obstack temp_obstack
;
2703 mutable_map
= addrmap_create_mutable (&temp_obstack
);
2705 iter
= index
->address_table
.data ();
2706 end
= iter
+ index
->address_table
.size ();
2708 baseaddr
= objfile
->text_section_offset ();
2712 ULONGEST hi
, lo
, cu_index
;
2713 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2715 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
2717 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
2722 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
2723 hex_string (lo
), hex_string (hi
));
2727 if (cu_index
>= per_objfile
->per_bfd
->all_comp_units
.size ())
2729 complaint (_(".gdb_index address table has invalid CU number %u"),
2730 (unsigned) cu_index
);
2734 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
) - baseaddr
;
2735 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
) - baseaddr
;
2736 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
2737 per_objfile
->per_bfd
->get_cu (cu_index
));
2740 objfile
->partial_symtabs
->psymtabs_addrmap
2741 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2744 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
2745 populate the objfile's psymtabs_addrmap. */
2748 create_addrmap_from_aranges (dwarf2_per_objfile
*per_objfile
,
2749 struct dwarf2_section_info
*section
)
2751 struct objfile
*objfile
= per_objfile
->objfile
;
2752 bfd
*abfd
= objfile
->obfd
;
2753 struct gdbarch
*gdbarch
= objfile
->arch ();
2754 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
2756 auto_obstack temp_obstack
;
2757 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
2759 std::unordered_map
<sect_offset
,
2760 dwarf2_per_cu_data
*,
2761 gdb::hash_enum
<sect_offset
>>
2762 debug_info_offset_to_per_cu
;
2763 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
2765 const auto insertpair
2766 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
2767 if (!insertpair
.second
)
2769 warning (_("Section .debug_aranges in %s has duplicate "
2770 "debug_info_offset %s, ignoring .debug_aranges."),
2771 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
2776 section
->read (objfile
);
2778 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
2780 const gdb_byte
*addr
= section
->buffer
;
2782 while (addr
< section
->buffer
+ section
->size
)
2784 const gdb_byte
*const entry_addr
= addr
;
2785 unsigned int bytes_read
;
2787 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
2791 const gdb_byte
*const entry_end
= addr
+ entry_length
;
2792 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
2793 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
2794 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
2796 warning (_("Section .debug_aranges in %s entry at offset %s "
2797 "length %s exceeds section length %s, "
2798 "ignoring .debug_aranges."),
2799 objfile_name (objfile
),
2800 plongest (entry_addr
- section
->buffer
),
2801 plongest (bytes_read
+ entry_length
),
2802 pulongest (section
->size
));
2806 /* The version number. */
2807 const uint16_t version
= read_2_bytes (abfd
, addr
);
2811 warning (_("Section .debug_aranges in %s entry at offset %s "
2812 "has unsupported version %d, ignoring .debug_aranges."),
2813 objfile_name (objfile
),
2814 plongest (entry_addr
- section
->buffer
), version
);
2818 const uint64_t debug_info_offset
2819 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
2820 addr
+= offset_size
;
2821 const auto per_cu_it
2822 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
2823 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
2825 warning (_("Section .debug_aranges in %s entry at offset %s "
2826 "debug_info_offset %s does not exists, "
2827 "ignoring .debug_aranges."),
2828 objfile_name (objfile
),
2829 plongest (entry_addr
- section
->buffer
),
2830 pulongest (debug_info_offset
));
2833 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
2835 const uint8_t address_size
= *addr
++;
2836 if (address_size
< 1 || address_size
> 8)
2838 warning (_("Section .debug_aranges in %s entry at offset %s "
2839 "address_size %u is invalid, ignoring .debug_aranges."),
2840 objfile_name (objfile
),
2841 plongest (entry_addr
- section
->buffer
), address_size
);
2845 const uint8_t segment_selector_size
= *addr
++;
2846 if (segment_selector_size
!= 0)
2848 warning (_("Section .debug_aranges in %s entry at offset %s "
2849 "segment_selector_size %u is not supported, "
2850 "ignoring .debug_aranges."),
2851 objfile_name (objfile
),
2852 plongest (entry_addr
- section
->buffer
),
2853 segment_selector_size
);
2857 /* Must pad to an alignment boundary that is twice the address
2858 size. It is undocumented by the DWARF standard but GCC does
2860 for (size_t padding
= ((-(addr
- section
->buffer
))
2861 & (2 * address_size
- 1));
2862 padding
> 0; padding
--)
2865 warning (_("Section .debug_aranges in %s entry at offset %s "
2866 "padding is not zero, ignoring .debug_aranges."),
2867 objfile_name (objfile
),
2868 plongest (entry_addr
- section
->buffer
));
2874 if (addr
+ 2 * address_size
> entry_end
)
2876 warning (_("Section .debug_aranges in %s entry at offset %s "
2877 "address list is not properly terminated, "
2878 "ignoring .debug_aranges."),
2879 objfile_name (objfile
),
2880 plongest (entry_addr
- section
->buffer
));
2883 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
2885 addr
+= address_size
;
2886 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
2888 addr
+= address_size
;
2889 if (start
== 0 && length
== 0)
2891 if (start
== 0 && !per_objfile
->per_bfd
->has_section_at_zero
)
2893 /* Symbol was eliminated due to a COMDAT group. */
2896 ULONGEST end
= start
+ length
;
2897 start
= (gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
)
2899 end
= (gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
)
2901 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
2905 objfile
->partial_symtabs
->psymtabs_addrmap
2906 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
2909 /* Find a slot in the mapped index INDEX for the object named NAME.
2910 If NAME is found, set *VEC_OUT to point to the CU vector in the
2911 constant pool and return true. If NAME cannot be found, return
2915 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
2916 offset_type
**vec_out
)
2919 offset_type slot
, step
;
2920 int (*cmp
) (const char *, const char *);
2922 gdb::unique_xmalloc_ptr
<char> without_params
;
2923 if (current_language
->la_language
== language_cplus
2924 || current_language
->la_language
== language_fortran
2925 || current_language
->la_language
== language_d
)
2927 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
2930 if (strchr (name
, '(') != NULL
)
2932 without_params
= cp_remove_params (name
);
2934 if (without_params
!= NULL
)
2935 name
= without_params
.get ();
2939 /* Index version 4 did not support case insensitive searches. But the
2940 indices for case insensitive languages are built in lowercase, therefore
2941 simulate our NAME being searched is also lowercased. */
2942 hash
= mapped_index_string_hash ((index
->version
== 4
2943 && case_sensitivity
== case_sensitive_off
2944 ? 5 : index
->version
),
2947 slot
= hash
& (index
->symbol_table
.size () - 1);
2948 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
2949 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
2955 const auto &bucket
= index
->symbol_table
[slot
];
2956 if (bucket
.name
== 0 && bucket
.vec
== 0)
2959 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
2960 if (!cmp (name
, str
))
2962 *vec_out
= (offset_type
*) (index
->constant_pool
2963 + MAYBE_SWAP (bucket
.vec
));
2967 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
2971 /* A helper function that reads the .gdb_index from BUFFER and fills
2972 in MAP. FILENAME is the name of the file containing the data;
2973 it is used for error reporting. DEPRECATED_OK is true if it is
2974 ok to use deprecated sections.
2976 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
2977 out parameters that are filled in with information about the CU and
2978 TU lists in the section.
2980 Returns true if all went well, false otherwise. */
2983 read_gdb_index_from_buffer (const char *filename
,
2985 gdb::array_view
<const gdb_byte
> buffer
,
2986 struct mapped_index
*map
,
2987 const gdb_byte
**cu_list
,
2988 offset_type
*cu_list_elements
,
2989 const gdb_byte
**types_list
,
2990 offset_type
*types_list_elements
)
2992 const gdb_byte
*addr
= &buffer
[0];
2994 /* Version check. */
2995 offset_type version
= MAYBE_SWAP (*(offset_type
*) addr
);
2996 /* Versions earlier than 3 emitted every copy of a psymbol. This
2997 causes the index to behave very poorly for certain requests. Version 3
2998 contained incomplete addrmap. So, it seems better to just ignore such
3002 static int warning_printed
= 0;
3003 if (!warning_printed
)
3005 warning (_("Skipping obsolete .gdb_index section in %s."),
3007 warning_printed
= 1;
3011 /* Index version 4 uses a different hash function than index version
3014 Versions earlier than 6 did not emit psymbols for inlined
3015 functions. Using these files will cause GDB not to be able to
3016 set breakpoints on inlined functions by name, so we ignore these
3017 indices unless the user has done
3018 "set use-deprecated-index-sections on". */
3019 if (version
< 6 && !deprecated_ok
)
3021 static int warning_printed
= 0;
3022 if (!warning_printed
)
3025 Skipping deprecated .gdb_index section in %s.\n\
3026 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3027 to use the section anyway."),
3029 warning_printed
= 1;
3033 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3034 of the TU (for symbols coming from TUs),
3035 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3036 Plus gold-generated indices can have duplicate entries for global symbols,
3037 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3038 These are just performance bugs, and we can't distinguish gdb-generated
3039 indices from gold-generated ones, so issue no warning here. */
3041 /* Indexes with higher version than the one supported by GDB may be no
3042 longer backward compatible. */
3046 map
->version
= version
;
3048 offset_type
*metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3051 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3052 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3056 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3057 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3058 - MAYBE_SWAP (metadata
[i
]))
3062 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3063 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3065 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3068 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3069 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3071 = gdb::array_view
<mapped_index::symbol_table_slot
>
3072 ((mapped_index::symbol_table_slot
*) symbol_table
,
3073 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3076 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3081 /* Callback types for dwarf2_read_gdb_index. */
3083 typedef gdb::function_view
3084 <gdb::array_view
<const gdb_byte
>(objfile
*, dwarf2_per_bfd
*)>
3085 get_gdb_index_contents_ftype
;
3086 typedef gdb::function_view
3087 <gdb::array_view
<const gdb_byte
>(objfile
*, dwz_file
*)>
3088 get_gdb_index_contents_dwz_ftype
;
3090 /* Read .gdb_index. If everything went ok, initialize the "quick"
3091 elements of all the CUs and return 1. Otherwise, return 0. */
3094 dwarf2_read_gdb_index
3095 (dwarf2_per_objfile
*per_objfile
,
3096 get_gdb_index_contents_ftype get_gdb_index_contents
,
3097 get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz
)
3099 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3100 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3101 struct dwz_file
*dwz
;
3102 struct objfile
*objfile
= per_objfile
->objfile
;
3103 dwarf2_per_bfd
*per_bfd
= per_objfile
->per_bfd
;
3105 gdb::array_view
<const gdb_byte
> main_index_contents
3106 = get_gdb_index_contents (objfile
, per_bfd
);
3108 if (main_index_contents
.empty ())
3111 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3112 if (!read_gdb_index_from_buffer (objfile_name (objfile
),
3113 use_deprecated_index_sections
,
3114 main_index_contents
, map
.get (), &cu_list
,
3115 &cu_list_elements
, &types_list
,
3116 &types_list_elements
))
3119 /* Don't use the index if it's empty. */
3120 if (map
->symbol_table
.empty ())
3123 /* If there is a .dwz file, read it so we can get its CU list as
3125 dwz
= dwarf2_get_dwz_file (per_bfd
);
3128 struct mapped_index dwz_map
;
3129 const gdb_byte
*dwz_types_ignore
;
3130 offset_type dwz_types_elements_ignore
;
3132 gdb::array_view
<const gdb_byte
> dwz_index_content
3133 = get_gdb_index_contents_dwz (objfile
, dwz
);
3135 if (dwz_index_content
.empty ())
3138 if (!read_gdb_index_from_buffer (bfd_get_filename (dwz
->dwz_bfd
.get ()),
3139 1, dwz_index_content
, &dwz_map
,
3140 &dwz_list
, &dwz_list_elements
,
3142 &dwz_types_elements_ignore
))
3144 warning (_("could not read '.gdb_index' section from %s; skipping"),
3145 bfd_get_filename (dwz
->dwz_bfd
.get ()));
3150 create_cus_from_index (per_bfd
, cu_list
, cu_list_elements
, dwz_list
,
3153 if (types_list_elements
)
3155 /* We can only handle a single .debug_types when we have an
3157 if (per_bfd
->types
.size () != 1)
3160 dwarf2_section_info
*section
= &per_bfd
->types
[0];
3162 create_signatured_type_table_from_index (per_bfd
, section
, types_list
,
3163 types_list_elements
);
3166 create_addrmap_from_index (per_objfile
, map
.get ());
3168 per_bfd
->index_table
= std::move (map
);
3169 per_bfd
->using_index
= 1;
3170 per_bfd
->quick_file_names_table
=
3171 create_quick_file_names_table (per_bfd
->all_comp_units
.size ());
3173 /* Save partial symtabs in the per_bfd object, for the benefit of subsequent
3174 objfiles using the same BFD. */
3175 gdb_assert (per_bfd
->partial_symtabs
== nullptr);
3176 per_bfd
->partial_symtabs
= objfile
->partial_symtabs
;
3181 /* die_reader_func for dw2_get_file_names. */
3184 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3185 const gdb_byte
*info_ptr
,
3186 struct die_info
*comp_unit_die
)
3188 struct dwarf2_cu
*cu
= reader
->cu
;
3189 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3190 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
3191 struct dwarf2_per_cu_data
*lh_cu
;
3192 struct attribute
*attr
;
3194 struct quick_file_names
*qfn
;
3196 gdb_assert (! this_cu
->is_debug_types
);
3198 /* Our callers never want to match partial units -- instead they
3199 will match the enclosing full CU. */
3200 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3202 this_cu
->v
.quick
->no_file_data
= 1;
3210 sect_offset line_offset
{};
3212 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3213 if (attr
!= nullptr)
3215 struct quick_file_names find_entry
;
3217 line_offset
= (sect_offset
) DW_UNSND (attr
);
3219 /* We may have already read in this line header (TU line header sharing).
3220 If we have we're done. */
3221 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3222 find_entry
.hash
.line_sect_off
= line_offset
;
3223 slot
= htab_find_slot (per_objfile
->per_bfd
->quick_file_names_table
.get (),
3224 &find_entry
, INSERT
);
3227 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3231 lh
= dwarf_decode_line_header (line_offset
, cu
);
3235 lh_cu
->v
.quick
->no_file_data
= 1;
3239 qfn
= XOBNEW (&per_objfile
->per_bfd
->obstack
, struct quick_file_names
);
3240 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3241 qfn
->hash
.line_sect_off
= line_offset
;
3242 gdb_assert (slot
!= NULL
);
3245 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3248 if (strcmp (fnd
.name
, "<unknown>") != 0)
3251 qfn
->num_file_names
= offset
+ lh
->file_names_size ();
3253 XOBNEWVEC (&per_objfile
->per_bfd
->obstack
, const char *,
3254 qfn
->num_file_names
);
3256 qfn
->file_names
[0] = xstrdup (fnd
.name
);
3257 for (int i
= 0; i
< lh
->file_names_size (); ++i
)
3258 qfn
->file_names
[i
+ offset
] = lh
->file_full_name (i
+ 1,
3259 fnd
.comp_dir
).release ();
3260 qfn
->real_names
= NULL
;
3262 lh_cu
->v
.quick
->file_names
= qfn
;
3265 /* A helper for the "quick" functions which attempts to read the line
3266 table for THIS_CU. */
3268 static struct quick_file_names
*
3269 dw2_get_file_names (dwarf2_per_cu_data
*this_cu
,
3270 dwarf2_per_objfile
*per_objfile
)
3272 /* This should never be called for TUs. */
3273 gdb_assert (! this_cu
->is_debug_types
);
3274 /* Nor type unit groups. */
3275 gdb_assert (! this_cu
->type_unit_group_p ());
3277 if (this_cu
->v
.quick
->file_names
!= NULL
)
3278 return this_cu
->v
.quick
->file_names
;
3279 /* If we know there is no line data, no point in looking again. */
3280 if (this_cu
->v
.quick
->no_file_data
)
3283 cutu_reader
reader (this_cu
, per_objfile
);
3284 if (!reader
.dummy_p
)
3285 dw2_get_file_names_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
);
3287 if (this_cu
->v
.quick
->no_file_data
)
3289 return this_cu
->v
.quick
->file_names
;
3292 /* A helper for the "quick" functions which computes and caches the
3293 real path for a given file name from the line table. */
3296 dw2_get_real_path (dwarf2_per_objfile
*per_objfile
,
3297 struct quick_file_names
*qfn
, int index
)
3299 if (qfn
->real_names
== NULL
)
3300 qfn
->real_names
= OBSTACK_CALLOC (&per_objfile
->per_bfd
->obstack
,
3301 qfn
->num_file_names
, const char *);
3303 if (qfn
->real_names
[index
] == NULL
)
3304 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3306 return qfn
->real_names
[index
];
3309 static struct symtab
*
3310 dw2_find_last_source_symtab (struct objfile
*objfile
)
3312 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3313 dwarf2_per_cu_data
*dwarf_cu
= per_objfile
->per_bfd
->all_comp_units
.back ();
3314 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
, per_objfile
, false);
3319 return compunit_primary_filetab (cust
);
3322 /* Traversal function for dw2_forget_cached_source_info. */
3325 dw2_free_cached_file_names (void **slot
, void *info
)
3327 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3329 if (file_data
->real_names
)
3333 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3335 xfree ((void*) file_data
->real_names
[i
]);
3336 file_data
->real_names
[i
] = NULL
;
3344 dw2_forget_cached_source_info (struct objfile
*objfile
)
3346 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3348 htab_traverse_noresize (per_objfile
->per_bfd
->quick_file_names_table
.get (),
3349 dw2_free_cached_file_names
, NULL
);
3352 /* Helper function for dw2_map_symtabs_matching_filename that expands
3353 the symtabs and calls the iterator. */
3356 dw2_map_expand_apply (struct objfile
*objfile
,
3357 struct dwarf2_per_cu_data
*per_cu
,
3358 const char *name
, const char *real_path
,
3359 gdb::function_view
<bool (symtab
*)> callback
)
3361 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3363 /* Don't visit already-expanded CUs. */
3364 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3365 if (per_objfile
->symtab_set_p (per_cu
))
3368 /* This may expand more than one symtab, and we want to iterate over
3370 dw2_instantiate_symtab (per_cu
, per_objfile
, false);
3372 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3373 last_made
, callback
);
3376 /* Implementation of the map_symtabs_matching_filename method. */
3379 dw2_map_symtabs_matching_filename
3380 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3381 gdb::function_view
<bool (symtab
*)> callback
)
3383 const char *name_basename
= lbasename (name
);
3384 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3386 /* The rule is CUs specify all the files, including those used by
3387 any TU, so there's no need to scan TUs here. */
3389 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
3391 /* We only need to look at symtabs not already expanded. */
3392 if (per_objfile
->symtab_set_p (per_cu
))
3395 quick_file_names
*file_data
= dw2_get_file_names (per_cu
, per_objfile
);
3396 if (file_data
== NULL
)
3399 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3401 const char *this_name
= file_data
->file_names
[j
];
3402 const char *this_real_name
;
3404 if (compare_filenames_for_search (this_name
, name
))
3406 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3412 /* Before we invoke realpath, which can get expensive when many
3413 files are involved, do a quick comparison of the basenames. */
3414 if (! basenames_may_differ
3415 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3418 this_real_name
= dw2_get_real_path (per_objfile
, file_data
, j
);
3419 if (compare_filenames_for_search (this_real_name
, name
))
3421 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3427 if (real_path
!= NULL
)
3429 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3430 gdb_assert (IS_ABSOLUTE_PATH (name
));
3431 if (this_real_name
!= NULL
3432 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3434 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3446 /* Struct used to manage iterating over all CUs looking for a symbol. */
3448 struct dw2_symtab_iterator
3450 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3451 dwarf2_per_objfile
*per_objfile
;
3452 /* If set, only look for symbols that match that block. Valid values are
3453 GLOBAL_BLOCK and STATIC_BLOCK. */
3454 gdb::optional
<block_enum
> block_index
;
3455 /* The kind of symbol we're looking for. */
3457 /* The list of CUs from the index entry of the symbol,
3458 or NULL if not found. */
3460 /* The next element in VEC to look at. */
3462 /* The number of elements in VEC, or zero if there is no match. */
3464 /* Have we seen a global version of the symbol?
3465 If so we can ignore all further global instances.
3466 This is to work around gold/15646, inefficient gold-generated
3471 /* Initialize the index symtab iterator ITER, common part. */
3474 dw2_symtab_iter_init_common (struct dw2_symtab_iterator
*iter
,
3475 dwarf2_per_objfile
*per_objfile
,
3476 gdb::optional
<block_enum
> block_index
,
3479 iter
->per_objfile
= per_objfile
;
3480 iter
->block_index
= block_index
;
3481 iter
->domain
= domain
;
3483 iter
->global_seen
= 0;
3488 /* Initialize the index symtab iterator ITER, const char *NAME variant. */
3491 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3492 dwarf2_per_objfile
*per_objfile
,
3493 gdb::optional
<block_enum
> block_index
,
3497 dw2_symtab_iter_init_common (iter
, per_objfile
, block_index
, domain
);
3499 mapped_index
*index
= per_objfile
->per_bfd
->index_table
.get ();
3500 /* index is NULL if OBJF_READNOW. */
3504 if (find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3505 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3508 /* Initialize the index symtab iterator ITER, offset_type NAMEI variant. */
3511 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3512 dwarf2_per_objfile
*per_objfile
,
3513 gdb::optional
<block_enum
> block_index
,
3514 domain_enum domain
, offset_type namei
)
3516 dw2_symtab_iter_init_common (iter
, per_objfile
, block_index
, domain
);
3518 mapped_index
*index
= per_objfile
->per_bfd
->index_table
.get ();
3519 /* index is NULL if OBJF_READNOW. */
3523 gdb_assert (!index
->symbol_name_slot_invalid (namei
));
3524 const auto &bucket
= index
->symbol_table
[namei
];
3526 iter
->vec
= (offset_type
*) (index
->constant_pool
3527 + MAYBE_SWAP (bucket
.vec
));
3528 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3531 /* Return the next matching CU or NULL if there are no more. */
3533 static struct dwarf2_per_cu_data
*
3534 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3536 dwarf2_per_objfile
*per_objfile
= iter
->per_objfile
;
3538 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3540 offset_type cu_index_and_attrs
=
3541 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3542 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3543 gdb_index_symbol_kind symbol_kind
=
3544 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3545 /* Only check the symbol attributes if they're present.
3546 Indices prior to version 7 don't record them,
3547 and indices >= 7 may elide them for certain symbols
3548 (gold does this). */
3550 (per_objfile
->per_bfd
->index_table
->version
>= 7
3551 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3553 /* Don't crash on bad data. */
3554 if (cu_index
>= (per_objfile
->per_bfd
->all_comp_units
.size ()
3555 + per_objfile
->per_bfd
->all_type_units
.size ()))
3557 complaint (_(".gdb_index entry has bad CU index"
3558 " [in module %s]"), objfile_name (per_objfile
->objfile
));
3562 dwarf2_per_cu_data
*per_cu
= per_objfile
->per_bfd
->get_cutu (cu_index
);
3564 /* Skip if already read in. */
3565 if (per_objfile
->symtab_set_p (per_cu
))
3568 /* Check static vs global. */
3571 bool is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3573 if (iter
->block_index
.has_value ())
3575 bool want_static
= *iter
->block_index
== STATIC_BLOCK
;
3577 if (is_static
!= want_static
)
3581 /* Work around gold/15646. */
3583 && symbol_kind
== GDB_INDEX_SYMBOL_KIND_TYPE
)
3585 if (iter
->global_seen
)
3588 iter
->global_seen
= 1;
3592 /* Only check the symbol's kind if it has one. */
3595 switch (iter
->domain
)
3598 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3599 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3600 /* Some types are also in VAR_DOMAIN. */
3601 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3605 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3609 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3613 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
3628 static struct compunit_symtab
*
3629 dw2_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
3630 const char *name
, domain_enum domain
)
3632 struct compunit_symtab
*stab_best
= NULL
;
3633 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3635 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
3637 struct dw2_symtab_iterator iter
;
3638 struct dwarf2_per_cu_data
*per_cu
;
3640 dw2_symtab_iter_init (&iter
, per_objfile
, block_index
, domain
, name
);
3642 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3644 struct symbol
*sym
, *with_opaque
= NULL
;
3645 struct compunit_symtab
*stab
3646 = dw2_instantiate_symtab (per_cu
, per_objfile
, false);
3647 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
3648 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
3650 sym
= block_find_symbol (block
, name
, domain
,
3651 block_find_non_opaque_type_preferred
,
3654 /* Some caution must be observed with overloaded functions
3655 and methods, since the index will not contain any overload
3656 information (but NAME might contain it). */
3659 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
3661 if (with_opaque
!= NULL
3662 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
3665 /* Keep looking through other CUs. */
3672 dw2_print_stats (struct objfile
*objfile
)
3674 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3675 int total
= (per_objfile
->per_bfd
->all_comp_units
.size ()
3676 + per_objfile
->per_bfd
->all_type_units
.size ());
3679 for (int i
= 0; i
< total
; ++i
)
3681 dwarf2_per_cu_data
*per_cu
= per_objfile
->per_bfd
->get_cutu (i
);
3683 if (!per_objfile
->symtab_set_p (per_cu
))
3686 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
3687 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
3690 /* This dumps minimal information about the index.
3691 It is called via "mt print objfiles".
3692 One use is to verify .gdb_index has been loaded by the
3693 gdb.dwarf2/gdb-index.exp testcase. */
3696 dw2_dump (struct objfile
*objfile
)
3698 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3700 gdb_assert (per_objfile
->per_bfd
->using_index
);
3701 printf_filtered (".gdb_index:");
3702 if (per_objfile
->per_bfd
->index_table
!= NULL
)
3704 printf_filtered (" version %d\n",
3705 per_objfile
->per_bfd
->index_table
->version
);
3708 printf_filtered (" faked for \"readnow\"\n");
3709 printf_filtered ("\n");
3713 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
3714 const char *func_name
)
3716 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3718 struct dw2_symtab_iterator iter
;
3719 struct dwarf2_per_cu_data
*per_cu
;
3721 dw2_symtab_iter_init (&iter
, per_objfile
, {}, VAR_DOMAIN
, func_name
);
3723 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3724 dw2_instantiate_symtab (per_cu
, per_objfile
, false);
3729 dw2_expand_all_symtabs (struct objfile
*objfile
)
3731 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3732 int total_units
= (per_objfile
->per_bfd
->all_comp_units
.size ()
3733 + per_objfile
->per_bfd
->all_type_units
.size ());
3735 for (int i
= 0; i
< total_units
; ++i
)
3737 dwarf2_per_cu_data
*per_cu
= per_objfile
->per_bfd
->get_cutu (i
);
3739 /* We don't want to directly expand a partial CU, because if we
3740 read it with the wrong language, then assertion failures can
3741 be triggered later on. See PR symtab/23010. So, tell
3742 dw2_instantiate_symtab to skip partial CUs -- any important
3743 partial CU will be read via DW_TAG_imported_unit anyway. */
3744 dw2_instantiate_symtab (per_cu
, per_objfile
, true);
3749 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
3750 const char *fullname
)
3752 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3754 /* We don't need to consider type units here.
3755 This is only called for examining code, e.g. expand_line_sal.
3756 There can be an order of magnitude (or more) more type units
3757 than comp units, and we avoid them if we can. */
3759 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
3761 /* We only need to look at symtabs not already expanded. */
3762 if (per_objfile
->symtab_set_p (per_cu
))
3765 quick_file_names
*file_data
= dw2_get_file_names (per_cu
, per_objfile
);
3766 if (file_data
== NULL
)
3769 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3771 const char *this_fullname
= file_data
->file_names
[j
];
3773 if (filename_cmp (this_fullname
, fullname
) == 0)
3775 dw2_instantiate_symtab (per_cu
, per_objfile
, false);
3783 dw2_expand_symtabs_matching_symbol
3784 (mapped_index_base
&index
,
3785 const lookup_name_info
&lookup_name_in
,
3786 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3787 enum search_domain kind
,
3788 gdb::function_view
<bool (offset_type
)> match_callback
,
3789 dwarf2_per_objfile
*per_objfile
);
3792 dw2_expand_symtabs_matching_one
3793 (dwarf2_per_cu_data
*per_cu
,
3794 dwarf2_per_objfile
*per_objfile
,
3795 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3796 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
);
3799 dw2_map_matching_symbols
3800 (struct objfile
*objfile
,
3801 const lookup_name_info
&name
, domain_enum domain
,
3803 gdb::function_view
<symbol_found_callback_ftype
> callback
,
3804 symbol_compare_ftype
*ordered_compare
)
3807 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
3809 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
3811 if (per_objfile
->per_bfd
->index_table
!= nullptr)
3813 mapped_index
&index
= *per_objfile
->per_bfd
->index_table
;
3815 const char *match_name
= name
.ada ().lookup_name ().c_str ();
3816 auto matcher
= [&] (const char *symname
)
3818 if (ordered_compare
== nullptr)
3820 return ordered_compare (symname
, match_name
) == 0;
3823 dw2_expand_symtabs_matching_symbol (index
, name
, matcher
, ALL_DOMAIN
,
3824 [&] (offset_type namei
)
3826 struct dw2_symtab_iterator iter
;
3827 struct dwarf2_per_cu_data
*per_cu
;
3829 dw2_symtab_iter_init (&iter
, per_objfile
, block_kind
, domain
,
3831 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
3832 dw2_expand_symtabs_matching_one (per_cu
, per_objfile
, nullptr,
3839 /* We have -readnow: no .gdb_index, but no partial symtabs either. So,
3840 proceed assuming all symtabs have been read in. */
3843 for (compunit_symtab
*cust
: objfile
->compunits ())
3845 const struct block
*block
;
3849 block
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), block_kind
);
3850 if (!iterate_over_symbols_terminated (block
, name
,
3856 /* Starting from a search name, return the string that finds the upper
3857 bound of all strings that start with SEARCH_NAME in a sorted name
3858 list. Returns the empty string to indicate that the upper bound is
3859 the end of the list. */
3862 make_sort_after_prefix_name (const char *search_name
)
3864 /* When looking to complete "func", we find the upper bound of all
3865 symbols that start with "func" by looking for where we'd insert
3866 the closest string that would follow "func" in lexicographical
3867 order. Usually, that's "func"-with-last-character-incremented,
3868 i.e. "fund". Mind non-ASCII characters, though. Usually those
3869 will be UTF-8 multi-byte sequences, but we can't be certain.
3870 Especially mind the 0xff character, which is a valid character in
3871 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
3872 rule out compilers allowing it in identifiers. Note that
3873 conveniently, strcmp/strcasecmp are specified to compare
3874 characters interpreted as unsigned char. So what we do is treat
3875 the whole string as a base 256 number composed of a sequence of
3876 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
3877 to 0, and carries 1 to the following more-significant position.
3878 If the very first character in SEARCH_NAME ends up incremented
3879 and carries/overflows, then the upper bound is the end of the
3880 list. The string after the empty string is also the empty
3883 Some examples of this operation:
3885 SEARCH_NAME => "+1" RESULT
3889 "\xff" "a" "\xff" => "\xff" "b"
3894 Then, with these symbols for example:
3900 completing "func" looks for symbols between "func" and
3901 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
3902 which finds "func" and "func1", but not "fund".
3906 funcÿ (Latin1 'ÿ' [0xff])
3910 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
3911 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
3915 ÿÿ (Latin1 'ÿ' [0xff])
3918 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
3919 the end of the list.
3921 std::string after
= search_name
;
3922 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
3924 if (!after
.empty ())
3925 after
.back () = (unsigned char) after
.back () + 1;
3929 /* See declaration. */
3931 std::pair
<std::vector
<name_component
>::const_iterator
,
3932 std::vector
<name_component
>::const_iterator
>
3933 mapped_index_base::find_name_components_bounds
3934 (const lookup_name_info
&lookup_name_without_params
, language lang
,
3935 dwarf2_per_objfile
*per_objfile
) const
3938 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
3940 const char *lang_name
3941 = lookup_name_without_params
.language_lookup_name (lang
);
3943 /* Comparison function object for lower_bound that matches against a
3944 given symbol name. */
3945 auto lookup_compare_lower
= [&] (const name_component
&elem
,
3948 const char *elem_qualified
= this->symbol_name_at (elem
.idx
, per_objfile
);
3949 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
3950 return name_cmp (elem_name
, name
) < 0;
3953 /* Comparison function object for upper_bound that matches against a
3954 given symbol name. */
3955 auto lookup_compare_upper
= [&] (const char *name
,
3956 const name_component
&elem
)
3958 const char *elem_qualified
= this->symbol_name_at (elem
.idx
, per_objfile
);
3959 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
3960 return name_cmp (name
, elem_name
) < 0;
3963 auto begin
= this->name_components
.begin ();
3964 auto end
= this->name_components
.end ();
3966 /* Find the lower bound. */
3969 if (lookup_name_without_params
.completion_mode () && lang_name
[0] == '\0')
3972 return std::lower_bound (begin
, end
, lang_name
, lookup_compare_lower
);
3975 /* Find the upper bound. */
3978 if (lookup_name_without_params
.completion_mode ())
3980 /* In completion mode, we want UPPER to point past all
3981 symbols names that have the same prefix. I.e., with
3982 these symbols, and completing "func":
3984 function << lower bound
3986 other_function << upper bound
3988 We find the upper bound by looking for the insertion
3989 point of "func"-with-last-character-incremented,
3991 std::string after
= make_sort_after_prefix_name (lang_name
);
3994 return std::lower_bound (lower
, end
, after
.c_str (),
3995 lookup_compare_lower
);
3998 return std::upper_bound (lower
, end
, lang_name
, lookup_compare_upper
);
4001 return {lower
, upper
};
4004 /* See declaration. */
4007 mapped_index_base::build_name_components (dwarf2_per_objfile
*per_objfile
)
4009 if (!this->name_components
.empty ())
4012 this->name_components_casing
= case_sensitivity
;
4014 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4016 /* The code below only knows how to break apart components of C++
4017 symbol names (and other languages that use '::' as
4018 namespace/module separator) and Ada symbol names. */
4019 auto count
= this->symbol_name_count ();
4020 for (offset_type idx
= 0; idx
< count
; idx
++)
4022 if (this->symbol_name_slot_invalid (idx
))
4025 const char *name
= this->symbol_name_at (idx
, per_objfile
);
4027 /* Add each name component to the name component table. */
4028 unsigned int previous_len
= 0;
4030 if (strstr (name
, "::") != nullptr)
4032 for (unsigned int current_len
= cp_find_first_component (name
);
4033 name
[current_len
] != '\0';
4034 current_len
+= cp_find_first_component (name
+ current_len
))
4036 gdb_assert (name
[current_len
] == ':');
4037 this->name_components
.push_back ({previous_len
, idx
});
4038 /* Skip the '::'. */
4040 previous_len
= current_len
;
4045 /* Handle the Ada encoded (aka mangled) form here. */
4046 for (const char *iter
= strstr (name
, "__");
4048 iter
= strstr (iter
, "__"))
4050 this->name_components
.push_back ({previous_len
, idx
});
4052 previous_len
= iter
- name
;
4056 this->name_components
.push_back ({previous_len
, idx
});
4059 /* Sort name_components elements by name. */
4060 auto name_comp_compare
= [&] (const name_component
&left
,
4061 const name_component
&right
)
4063 const char *left_qualified
4064 = this->symbol_name_at (left
.idx
, per_objfile
);
4065 const char *right_qualified
4066 = this->symbol_name_at (right
.idx
, per_objfile
);
4068 const char *left_name
= left_qualified
+ left
.name_offset
;
4069 const char *right_name
= right_qualified
+ right
.name_offset
;
4071 return name_cmp (left_name
, right_name
) < 0;
4074 std::sort (this->name_components
.begin (),
4075 this->name_components
.end (),
4079 /* Helper for dw2_expand_symtabs_matching that works with a
4080 mapped_index_base instead of the containing objfile. This is split
4081 to a separate function in order to be able to unit test the
4082 name_components matching using a mock mapped_index_base. For each
4083 symbol name that matches, calls MATCH_CALLBACK, passing it the
4084 symbol's index in the mapped_index_base symbol table. */
4087 dw2_expand_symtabs_matching_symbol
4088 (mapped_index_base
&index
,
4089 const lookup_name_info
&lookup_name_in
,
4090 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4091 enum search_domain kind
,
4092 gdb::function_view
<bool (offset_type
)> match_callback
,
4093 dwarf2_per_objfile
*per_objfile
)
4095 lookup_name_info lookup_name_without_params
4096 = lookup_name_in
.make_ignore_params ();
4098 /* Build the symbol name component sorted vector, if we haven't
4100 index
.build_name_components (per_objfile
);
4102 /* The same symbol may appear more than once in the range though.
4103 E.g., if we're looking for symbols that complete "w", and we have
4104 a symbol named "w1::w2", we'll find the two name components for
4105 that same symbol in the range. To be sure we only call the
4106 callback once per symbol, we first collect the symbol name
4107 indexes that matched in a temporary vector and ignore
4109 std::vector
<offset_type
> matches
;
4111 struct name_and_matcher
4113 symbol_name_matcher_ftype
*matcher
;
4116 bool operator== (const name_and_matcher
&other
) const
4118 return matcher
== other
.matcher
&& strcmp (name
, other
.name
) == 0;
4122 /* A vector holding all the different symbol name matchers, for all
4124 std::vector
<name_and_matcher
> matchers
;
4126 for (int i
= 0; i
< nr_languages
; i
++)
4128 enum language lang_e
= (enum language
) i
;
4130 const language_defn
*lang
= language_def (lang_e
);
4131 symbol_name_matcher_ftype
*name_matcher
4132 = lang
->get_symbol_name_matcher (lookup_name_without_params
);
4134 name_and_matcher key
{
4136 lookup_name_without_params
.language_lookup_name (lang_e
)
4139 /* Don't insert the same comparison routine more than once.
4140 Note that we do this linear walk. This is not a problem in
4141 practice because the number of supported languages is
4143 if (std::find (matchers
.begin (), matchers
.end (), key
)
4146 matchers
.push_back (std::move (key
));
4149 = index
.find_name_components_bounds (lookup_name_without_params
,
4150 lang_e
, per_objfile
);
4152 /* Now for each symbol name in range, check to see if we have a name
4153 match, and if so, call the MATCH_CALLBACK callback. */
4155 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4157 const char *qualified
4158 = index
.symbol_name_at (bounds
.first
->idx
, per_objfile
);
4160 if (!name_matcher (qualified
, lookup_name_without_params
, NULL
)
4161 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4164 matches
.push_back (bounds
.first
->idx
);
4168 std::sort (matches
.begin (), matches
.end ());
4170 /* Finally call the callback, once per match. */
4172 for (offset_type idx
: matches
)
4176 if (!match_callback (idx
))
4182 /* Above we use a type wider than idx's for 'prev', since 0 and
4183 (offset_type)-1 are both possible values. */
4184 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4189 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4191 /* A mock .gdb_index/.debug_names-like name index table, enough to
4192 exercise dw2_expand_symtabs_matching_symbol, which works with the
4193 mapped_index_base interface. Builds an index from the symbol list
4194 passed as parameter to the constructor. */
4195 class mock_mapped_index
: public mapped_index_base
4198 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4199 : m_symbol_table (symbols
)
4202 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4204 /* Return the number of names in the symbol table. */
4205 size_t symbol_name_count () const override
4207 return m_symbol_table
.size ();
4210 /* Get the name of the symbol at IDX in the symbol table. */
4211 const char *symbol_name_at
4212 (offset_type idx
, dwarf2_per_objfile
*per_objfile
) const override
4214 return m_symbol_table
[idx
];
4218 gdb::array_view
<const char *> m_symbol_table
;
4221 /* Convenience function that converts a NULL pointer to a "<null>"
4222 string, to pass to print routines. */
4225 string_or_null (const char *str
)
4227 return str
!= NULL
? str
: "<null>";
4230 /* Check if a lookup_name_info built from
4231 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4232 index. EXPECTED_LIST is the list of expected matches, in expected
4233 matching order. If no match expected, then an empty list is
4234 specified. Returns true on success. On failure prints a warning
4235 indicating the file:line that failed, and returns false. */
4238 check_match (const char *file
, int line
,
4239 mock_mapped_index
&mock_index
,
4240 const char *name
, symbol_name_match_type match_type
,
4241 bool completion_mode
,
4242 std::initializer_list
<const char *> expected_list
,
4243 dwarf2_per_objfile
*per_objfile
)
4245 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4247 bool matched
= true;
4249 auto mismatch
= [&] (const char *expected_str
,
4252 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4253 "expected=\"%s\", got=\"%s\"\n"),
4255 (match_type
== symbol_name_match_type::FULL
4257 name
, string_or_null (expected_str
), string_or_null (got
));
4261 auto expected_it
= expected_list
.begin ();
4262 auto expected_end
= expected_list
.end ();
4264 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4266 [&] (offset_type idx
)
4268 const char *matched_name
= mock_index
.symbol_name_at (idx
, per_objfile
);
4269 const char *expected_str
4270 = expected_it
== expected_end
? NULL
: *expected_it
++;
4272 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4273 mismatch (expected_str
, matched_name
);
4277 const char *expected_str
4278 = expected_it
== expected_end
? NULL
: *expected_it
++;
4279 if (expected_str
!= NULL
)
4280 mismatch (expected_str
, NULL
);
4285 /* The symbols added to the mock mapped_index for testing (in
4287 static const char *test_symbols
[] = {
4296 "ns2::tmpl<int>::foo2",
4297 "(anonymous namespace)::A::B::C",
4299 /* These are used to check that the increment-last-char in the
4300 matching algorithm for completion doesn't match "t1_fund" when
4301 completing "t1_func". */
4307 /* A UTF-8 name with multi-byte sequences to make sure that
4308 cp-name-parser understands this as a single identifier ("função"
4309 is "function" in PT). */
4312 /* \377 (0xff) is Latin1 'ÿ'. */
4315 /* \377 (0xff) is Latin1 'ÿ'. */
4319 /* A name with all sorts of complications. Starts with "z" to make
4320 it easier for the completion tests below. */
4321 #define Z_SYM_NAME \
4322 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4323 "::tuple<(anonymous namespace)::ui*, " \
4324 "std::default_delete<(anonymous namespace)::ui>, void>"
4329 /* Returns true if the mapped_index_base::find_name_component_bounds
4330 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4331 in completion mode. */
4334 check_find_bounds_finds (mapped_index_base
&index
,
4335 const char *search_name
,
4336 gdb::array_view
<const char *> expected_syms
,
4337 dwarf2_per_objfile
*per_objfile
)
4339 lookup_name_info
lookup_name (search_name
,
4340 symbol_name_match_type::FULL
, true);
4342 auto bounds
= index
.find_name_components_bounds (lookup_name
,
4346 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4347 if (distance
!= expected_syms
.size ())
4350 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4352 auto nc_elem
= bounds
.first
+ exp_elem
;
4353 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
, per_objfile
);
4354 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4361 /* Test the lower-level mapped_index::find_name_component_bounds
4365 test_mapped_index_find_name_component_bounds ()
4367 mock_mapped_index
mock_index (test_symbols
);
4369 mock_index
.build_name_components (NULL
/* per_objfile */);
4371 /* Test the lower-level mapped_index::find_name_component_bounds
4372 method in completion mode. */
4374 static const char *expected_syms
[] = {
4379 SELF_CHECK (check_find_bounds_finds
4380 (mock_index
, "t1_func", expected_syms
,
4381 NULL
/* per_objfile */));
4384 /* Check that the increment-last-char in the name matching algorithm
4385 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4387 static const char *expected_syms1
[] = {
4391 SELF_CHECK (check_find_bounds_finds
4392 (mock_index
, "\377", expected_syms1
, NULL
/* per_objfile */));
4394 static const char *expected_syms2
[] = {
4397 SELF_CHECK (check_find_bounds_finds
4398 (mock_index
, "\377\377", expected_syms2
,
4399 NULL
/* per_objfile */));
4403 /* Test dw2_expand_symtabs_matching_symbol. */
4406 test_dw2_expand_symtabs_matching_symbol ()
4408 mock_mapped_index
mock_index (test_symbols
);
4410 /* We let all tests run until the end even if some fails, for debug
4412 bool any_mismatch
= false;
4414 /* Create the expected symbols list (an initializer_list). Needed
4415 because lists have commas, and we need to pass them to CHECK,
4416 which is a macro. */
4417 #define EXPECT(...) { __VA_ARGS__ }
4419 /* Wrapper for check_match that passes down the current
4420 __FILE__/__LINE__. */
4421 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4422 any_mismatch |= !check_match (__FILE__, __LINE__, \
4424 NAME, MATCH_TYPE, COMPLETION_MODE, \
4425 EXPECTED_LIST, NULL)
4427 /* Identity checks. */
4428 for (const char *sym
: test_symbols
)
4430 /* Should be able to match all existing symbols. */
4431 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4434 /* Should be able to match all existing symbols with
4436 std::string with_params
= std::string (sym
) + "(int)";
4437 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4440 /* Should be able to match all existing symbols with
4441 parameters and qualifiers. */
4442 with_params
= std::string (sym
) + " ( int ) const";
4443 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4446 /* This should really find sym, but cp-name-parser.y doesn't
4447 know about lvalue/rvalue qualifiers yet. */
4448 with_params
= std::string (sym
) + " ( int ) &&";
4449 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4453 /* Check that the name matching algorithm for completion doesn't get
4454 confused with Latin1 'ÿ' / 0xff. */
4456 static const char str
[] = "\377";
4457 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4458 EXPECT ("\377", "\377\377123"));
4461 /* Check that the increment-last-char in the matching algorithm for
4462 completion doesn't match "t1_fund" when completing "t1_func". */
4464 static const char str
[] = "t1_func";
4465 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4466 EXPECT ("t1_func", "t1_func1"));
4469 /* Check that completion mode works at each prefix of the expected
4472 static const char str
[] = "function(int)";
4473 size_t len
= strlen (str
);
4476 for (size_t i
= 1; i
< len
; i
++)
4478 lookup
.assign (str
, i
);
4479 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4480 EXPECT ("function"));
4484 /* While "w" is a prefix of both components, the match function
4485 should still only be called once. */
4487 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4489 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4493 /* Same, with a "complicated" symbol. */
4495 static const char str
[] = Z_SYM_NAME
;
4496 size_t len
= strlen (str
);
4499 for (size_t i
= 1; i
< len
; i
++)
4501 lookup
.assign (str
, i
);
4502 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4503 EXPECT (Z_SYM_NAME
));
4507 /* In FULL mode, an incomplete symbol doesn't match. */
4509 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4513 /* A complete symbol with parameters matches any overload, since the
4514 index has no overload info. */
4516 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4517 EXPECT ("std::zfunction", "std::zfunction2"));
4518 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4519 EXPECT ("std::zfunction", "std::zfunction2"));
4520 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4521 EXPECT ("std::zfunction", "std::zfunction2"));
4524 /* Check that whitespace is ignored appropriately. A symbol with a
4525 template argument list. */
4527 static const char expected
[] = "ns::foo<int>";
4528 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4530 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4534 /* Check that whitespace is ignored appropriately. A symbol with a
4535 template argument list that includes a pointer. */
4537 static const char expected
[] = "ns::foo<char*>";
4538 /* Try both completion and non-completion modes. */
4539 static const bool completion_mode
[2] = {false, true};
4540 for (size_t i
= 0; i
< 2; i
++)
4542 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4543 completion_mode
[i
], EXPECT (expected
));
4544 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4545 completion_mode
[i
], EXPECT (expected
));
4547 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4548 completion_mode
[i
], EXPECT (expected
));
4549 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4550 completion_mode
[i
], EXPECT (expected
));
4555 /* Check method qualifiers are ignored. */
4556 static const char expected
[] = "ns::foo<char*>";
4557 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4558 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4559 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4560 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4561 CHECK_MATCH ("foo < char * > ( int ) const",
4562 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4563 CHECK_MATCH ("foo < char * > ( int ) &&",
4564 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4567 /* Test lookup names that don't match anything. */
4569 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4572 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4576 /* Some wild matching tests, exercising "(anonymous namespace)",
4577 which should not be confused with a parameter list. */
4579 static const char *syms
[] = {
4583 "A :: B :: C ( int )",
4588 for (const char *s
: syms
)
4590 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4591 EXPECT ("(anonymous namespace)::A::B::C"));
4596 static const char expected
[] = "ns2::tmpl<int>::foo2";
4597 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4599 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4603 SELF_CHECK (!any_mismatch
);
4612 test_mapped_index_find_name_component_bounds ();
4613 test_dw2_expand_symtabs_matching_symbol ();
4616 }} // namespace selftests::dw2_expand_symtabs_matching
4618 #endif /* GDB_SELF_TEST */
4620 /* If FILE_MATCHER is NULL or if PER_CU has
4621 dwarf2_per_cu_quick_data::MARK set (see
4622 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4623 EXPANSION_NOTIFY on it. */
4626 dw2_expand_symtabs_matching_one
4627 (dwarf2_per_cu_data
*per_cu
,
4628 dwarf2_per_objfile
*per_objfile
,
4629 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4630 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4632 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4634 bool symtab_was_null
= !per_objfile
->symtab_set_p (per_cu
);
4636 compunit_symtab
*symtab
4637 = dw2_instantiate_symtab (per_cu
, per_objfile
, false);
4638 gdb_assert (symtab
!= nullptr);
4640 if (expansion_notify
!= NULL
&& symtab_was_null
)
4641 expansion_notify (symtab
);
4645 /* Helper for dw2_expand_matching symtabs. Called on each symbol
4646 matched, to expand corresponding CUs that were marked. IDX is the
4647 index of the symbol name that matched. */
4650 dw2_expand_marked_cus
4651 (dwarf2_per_objfile
*per_objfile
, offset_type idx
,
4652 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4653 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4656 offset_type
*vec
, vec_len
, vec_idx
;
4657 bool global_seen
= false;
4658 mapped_index
&index
= *per_objfile
->per_bfd
->index_table
;
4660 vec
= (offset_type
*) (index
.constant_pool
4661 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
4662 vec_len
= MAYBE_SWAP (vec
[0]);
4663 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
4665 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
4666 /* This value is only valid for index versions >= 7. */
4667 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
4668 gdb_index_symbol_kind symbol_kind
=
4669 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
4670 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
4671 /* Only check the symbol attributes if they're present.
4672 Indices prior to version 7 don't record them,
4673 and indices >= 7 may elide them for certain symbols
4674 (gold does this). */
4677 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4679 /* Work around gold/15646. */
4682 && symbol_kind
== GDB_INDEX_SYMBOL_KIND_TYPE
)
4690 /* Only check the symbol's kind if it has one. */
4695 case VARIABLES_DOMAIN
:
4696 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
4699 case FUNCTIONS_DOMAIN
:
4700 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
4704 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4707 case MODULES_DOMAIN
:
4708 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4716 /* Don't crash on bad data. */
4717 if (cu_index
>= (per_objfile
->per_bfd
->all_comp_units
.size ()
4718 + per_objfile
->per_bfd
->all_type_units
.size ()))
4720 complaint (_(".gdb_index entry has bad CU index"
4721 " [in module %s]"), objfile_name (per_objfile
->objfile
));
4725 dwarf2_per_cu_data
*per_cu
= per_objfile
->per_bfd
->get_cutu (cu_index
);
4726 dw2_expand_symtabs_matching_one (per_cu
, per_objfile
, file_matcher
,
4731 /* If FILE_MATCHER is non-NULL, set all the
4732 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
4733 that match FILE_MATCHER. */
4736 dw_expand_symtabs_matching_file_matcher
4737 (dwarf2_per_objfile
*per_objfile
,
4738 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
4740 if (file_matcher
== NULL
)
4743 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
4745 NULL
, xcalloc
, xfree
));
4746 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
4748 NULL
, xcalloc
, xfree
));
4750 /* The rule is CUs specify all the files, including those used by
4751 any TU, so there's no need to scan TUs here. */
4753 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
4757 per_cu
->v
.quick
->mark
= 0;
4759 /* We only need to look at symtabs not already expanded. */
4760 if (per_objfile
->symtab_set_p (per_cu
))
4763 quick_file_names
*file_data
= dw2_get_file_names (per_cu
, per_objfile
);
4764 if (file_data
== NULL
)
4767 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
4769 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
4771 per_cu
->v
.quick
->mark
= 1;
4775 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4777 const char *this_real_name
;
4779 if (file_matcher (file_data
->file_names
[j
], false))
4781 per_cu
->v
.quick
->mark
= 1;
4785 /* Before we invoke realpath, which can get expensive when many
4786 files are involved, do a quick comparison of the basenames. */
4787 if (!basenames_may_differ
4788 && !file_matcher (lbasename (file_data
->file_names
[j
]),
4792 this_real_name
= dw2_get_real_path (per_objfile
, file_data
, j
);
4793 if (file_matcher (this_real_name
, false))
4795 per_cu
->v
.quick
->mark
= 1;
4800 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
4801 ? visited_found
.get ()
4802 : visited_not_found
.get (),
4809 dw2_expand_symtabs_matching
4810 (struct objfile
*objfile
,
4811 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4812 const lookup_name_info
*lookup_name
,
4813 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4814 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
4815 enum search_domain kind
)
4817 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
4819 /* index_table is NULL if OBJF_READNOW. */
4820 if (!per_objfile
->per_bfd
->index_table
)
4823 dw_expand_symtabs_matching_file_matcher (per_objfile
, file_matcher
);
4825 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
4827 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
4831 dw2_expand_symtabs_matching_one (per_cu
, per_objfile
,
4832 file_matcher
, expansion_notify
);
4837 mapped_index
&index
= *per_objfile
->per_bfd
->index_table
;
4839 dw2_expand_symtabs_matching_symbol (index
, *lookup_name
,
4841 kind
, [&] (offset_type idx
)
4843 dw2_expand_marked_cus (per_objfile
, idx
, file_matcher
, expansion_notify
,
4849 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
4852 static struct compunit_symtab
*
4853 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
4858 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
4859 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
4862 if (cust
->includes
== NULL
)
4865 for (i
= 0; cust
->includes
[i
]; ++i
)
4867 struct compunit_symtab
*s
= cust
->includes
[i
];
4869 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
4877 static struct compunit_symtab
*
4878 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
4879 struct bound_minimal_symbol msymbol
,
4881 struct obj_section
*section
,
4884 struct dwarf2_per_cu_data
*data
;
4885 struct compunit_symtab
*result
;
4887 if (!objfile
->partial_symtabs
->psymtabs_addrmap
)
4890 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
4891 data
= (struct dwarf2_per_cu_data
*) addrmap_find
4892 (objfile
->partial_symtabs
->psymtabs_addrmap
, pc
- baseaddr
);
4896 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
4897 if (warn_if_readin
&& per_objfile
->symtab_set_p (data
))
4898 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
4899 paddress (objfile
->arch (), pc
));
4901 result
= recursively_find_pc_sect_compunit_symtab
4902 (dw2_instantiate_symtab (data
, per_objfile
, false), pc
);
4904 gdb_assert (result
!= NULL
);
4909 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
4910 void *data
, int need_fullname
)
4912 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
4914 if (!per_objfile
->per_bfd
->filenames_cache
)
4916 per_objfile
->per_bfd
->filenames_cache
.emplace ();
4918 htab_up
visited (htab_create_alloc (10,
4919 htab_hash_pointer
, htab_eq_pointer
,
4920 NULL
, xcalloc
, xfree
));
4922 /* The rule is CUs specify all the files, including those used
4923 by any TU, so there's no need to scan TUs here. We can
4924 ignore file names coming from already-expanded CUs. */
4926 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
4928 if (per_objfile
->symtab_set_p (per_cu
))
4930 void **slot
= htab_find_slot (visited
.get (),
4931 per_cu
->v
.quick
->file_names
,
4934 *slot
= per_cu
->v
.quick
->file_names
;
4938 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
4940 /* We only need to look at symtabs not already expanded. */
4941 if (per_objfile
->symtab_set_p (per_cu
))
4944 quick_file_names
*file_data
4945 = dw2_get_file_names (per_cu
, per_objfile
);
4946 if (file_data
== NULL
)
4949 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
4952 /* Already visited. */
4957 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4959 const char *filename
= file_data
->file_names
[j
];
4960 per_objfile
->per_bfd
->filenames_cache
->seen (filename
);
4965 per_objfile
->per_bfd
->filenames_cache
->traverse ([&] (const char *filename
)
4967 gdb::unique_xmalloc_ptr
<char> this_real_name
;
4970 this_real_name
= gdb_realpath (filename
);
4971 (*fun
) (filename
, this_real_name
.get (), data
);
4976 dw2_has_symbols (struct objfile
*objfile
)
4981 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
4984 dw2_find_last_source_symtab
,
4985 dw2_forget_cached_source_info
,
4986 dw2_map_symtabs_matching_filename
,
4991 dw2_expand_symtabs_for_function
,
4992 dw2_expand_all_symtabs
,
4993 dw2_expand_symtabs_with_fullname
,
4994 dw2_map_matching_symbols
,
4995 dw2_expand_symtabs_matching
,
4996 dw2_find_pc_sect_compunit_symtab
,
4998 dw2_map_symbol_filenames
5001 /* DWARF-5 debug_names reader. */
5003 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
5004 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
5006 /* A helper function that reads the .debug_names section in SECTION
5007 and fills in MAP. FILENAME is the name of the file containing the
5008 section; it is used for error reporting.
5010 Returns true if all went well, false otherwise. */
5013 read_debug_names_from_section (struct objfile
*objfile
,
5014 const char *filename
,
5015 struct dwarf2_section_info
*section
,
5016 mapped_debug_names
&map
)
5018 if (section
->empty ())
5021 /* Older elfutils strip versions could keep the section in the main
5022 executable while splitting it for the separate debug info file. */
5023 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
5026 section
->read (objfile
);
5028 map
.dwarf5_byte_order
= gdbarch_byte_order (objfile
->arch ());
5030 const gdb_byte
*addr
= section
->buffer
;
5032 bfd
*const abfd
= section
->get_bfd_owner ();
5034 unsigned int bytes_read
;
5035 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
5038 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
5039 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
5040 if (bytes_read
+ length
!= section
->size
)
5042 /* There may be multiple per-CU indices. */
5043 warning (_("Section .debug_names in %s length %s does not match "
5044 "section length %s, ignoring .debug_names."),
5045 filename
, plongest (bytes_read
+ length
),
5046 pulongest (section
->size
));
5050 /* The version number. */
5051 uint16_t version
= read_2_bytes (abfd
, addr
);
5055 warning (_("Section .debug_names in %s has unsupported version %d, "
5056 "ignoring .debug_names."),
5062 uint16_t padding
= read_2_bytes (abfd
, addr
);
5066 warning (_("Section .debug_names in %s has unsupported padding %d, "
5067 "ignoring .debug_names."),
5072 /* comp_unit_count - The number of CUs in the CU list. */
5073 map
.cu_count
= read_4_bytes (abfd
, addr
);
5076 /* local_type_unit_count - The number of TUs in the local TU
5078 map
.tu_count
= read_4_bytes (abfd
, addr
);
5081 /* foreign_type_unit_count - The number of TUs in the foreign TU
5083 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
5085 if (foreign_tu_count
!= 0)
5087 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
5088 "ignoring .debug_names."),
5089 filename
, static_cast<unsigned long> (foreign_tu_count
));
5093 /* bucket_count - The number of hash buckets in the hash lookup
5095 map
.bucket_count
= read_4_bytes (abfd
, addr
);
5098 /* name_count - The number of unique names in the index. */
5099 map
.name_count
= read_4_bytes (abfd
, addr
);
5102 /* abbrev_table_size - The size in bytes of the abbreviations
5104 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
5107 /* augmentation_string_size - The size in bytes of the augmentation
5108 string. This value is rounded up to a multiple of 4. */
5109 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
5111 map
.augmentation_is_gdb
= ((augmentation_string_size
5112 == sizeof (dwarf5_augmentation
))
5113 && memcmp (addr
, dwarf5_augmentation
,
5114 sizeof (dwarf5_augmentation
)) == 0);
5115 augmentation_string_size
+= (-augmentation_string_size
) & 3;
5116 addr
+= augmentation_string_size
;
5119 map
.cu_table_reordered
= addr
;
5120 addr
+= map
.cu_count
* map
.offset_size
;
5122 /* List of Local TUs */
5123 map
.tu_table_reordered
= addr
;
5124 addr
+= map
.tu_count
* map
.offset_size
;
5126 /* Hash Lookup Table */
5127 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5128 addr
+= map
.bucket_count
* 4;
5129 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5130 addr
+= map
.name_count
* 4;
5133 map
.name_table_string_offs_reordered
= addr
;
5134 addr
+= map
.name_count
* map
.offset_size
;
5135 map
.name_table_entry_offs_reordered
= addr
;
5136 addr
+= map
.name_count
* map
.offset_size
;
5138 const gdb_byte
*abbrev_table_start
= addr
;
5141 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5146 const auto insertpair
5147 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5148 if (!insertpair
.second
)
5150 warning (_("Section .debug_names in %s has duplicate index %s, "
5151 "ignoring .debug_names."),
5152 filename
, pulongest (index_num
));
5155 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5156 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5161 mapped_debug_names::index_val::attr attr
;
5162 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5164 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5166 if (attr
.form
== DW_FORM_implicit_const
)
5168 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5172 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5174 indexval
.attr_vec
.push_back (std::move (attr
));
5177 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5179 warning (_("Section .debug_names in %s has abbreviation_table "
5180 "of size %s vs. written as %u, ignoring .debug_names."),
5181 filename
, plongest (addr
- abbrev_table_start
),
5185 map
.entry_pool
= addr
;
5190 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5194 create_cus_from_debug_names_list (dwarf2_per_bfd
*per_bfd
,
5195 const mapped_debug_names
&map
,
5196 dwarf2_section_info
§ion
,
5199 if (!map
.augmentation_is_gdb
)
5201 for (uint32_t i
= 0; i
< map
.cu_count
; ++i
)
5203 sect_offset sect_off
5204 = (sect_offset
) (extract_unsigned_integer
5205 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5207 map
.dwarf5_byte_order
));
5208 /* We don't know the length of the CU, because the CU list in a
5209 .debug_names index can be incomplete, so we can't use the start of
5210 the next CU as end of this CU. We create the CUs here with length 0,
5211 and in cutu_reader::cutu_reader we'll fill in the actual length. */
5212 dwarf2_per_cu_data
*per_cu
5213 = create_cu_from_index_list (per_bfd
, §ion
, is_dwz
, sect_off
, 0);
5214 per_bfd
->all_comp_units
.push_back (per_cu
);
5218 sect_offset sect_off_prev
;
5219 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5221 sect_offset sect_off_next
;
5222 if (i
< map
.cu_count
)
5225 = (sect_offset
) (extract_unsigned_integer
5226 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5228 map
.dwarf5_byte_order
));
5231 sect_off_next
= (sect_offset
) section
.size
;
5234 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5235 dwarf2_per_cu_data
*per_cu
5236 = create_cu_from_index_list (per_bfd
, §ion
, is_dwz
,
5237 sect_off_prev
, length
);
5238 per_bfd
->all_comp_units
.push_back (per_cu
);
5240 sect_off_prev
= sect_off_next
;
5244 /* Read the CU list from the mapped index, and use it to create all
5245 the CU objects for this dwarf2_per_objfile. */
5248 create_cus_from_debug_names (dwarf2_per_bfd
*per_bfd
,
5249 const mapped_debug_names
&map
,
5250 const mapped_debug_names
&dwz_map
)
5252 gdb_assert (per_bfd
->all_comp_units
.empty ());
5253 per_bfd
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5255 create_cus_from_debug_names_list (per_bfd
, map
, per_bfd
->info
,
5256 false /* is_dwz */);
5258 if (dwz_map
.cu_count
== 0)
5261 dwz_file
*dwz
= dwarf2_get_dwz_file (per_bfd
);
5262 create_cus_from_debug_names_list (per_bfd
, dwz_map
, dwz
->info
,
5266 /* Read .debug_names. If everything went ok, initialize the "quick"
5267 elements of all the CUs and return true. Otherwise, return false. */
5270 dwarf2_read_debug_names (dwarf2_per_objfile
*per_objfile
)
5272 std::unique_ptr
<mapped_debug_names
> map (new mapped_debug_names
);
5273 mapped_debug_names dwz_map
;
5274 struct objfile
*objfile
= per_objfile
->objfile
;
5275 dwarf2_per_bfd
*per_bfd
= per_objfile
->per_bfd
;
5277 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5278 &per_objfile
->per_bfd
->debug_names
, *map
))
5281 /* Don't use the index if it's empty. */
5282 if (map
->name_count
== 0)
5285 /* If there is a .dwz file, read it so we can get its CU list as
5287 dwz_file
*dwz
= dwarf2_get_dwz_file (per_bfd
);
5290 if (!read_debug_names_from_section (objfile
,
5291 bfd_get_filename (dwz
->dwz_bfd
.get ()),
5292 &dwz
->debug_names
, dwz_map
))
5294 warning (_("could not read '.debug_names' section from %s; skipping"),
5295 bfd_get_filename (dwz
->dwz_bfd
.get ()));
5300 create_cus_from_debug_names (per_bfd
, *map
, dwz_map
);
5302 if (map
->tu_count
!= 0)
5304 /* We can only handle a single .debug_types when we have an
5306 if (per_bfd
->types
.size () != 1)
5309 dwarf2_section_info
*section
= &per_bfd
->types
[0];
5311 create_signatured_type_table_from_debug_names
5312 (per_objfile
, *map
, section
, &per_bfd
->abbrev
);
5315 create_addrmap_from_aranges (per_objfile
, &per_bfd
->debug_aranges
);
5317 per_bfd
->debug_names_table
= std::move (map
);
5318 per_bfd
->using_index
= 1;
5319 per_bfd
->quick_file_names_table
=
5320 create_quick_file_names_table (per_objfile
->per_bfd
->all_comp_units
.size ());
5322 /* Save partial symtabs in the per_bfd object, for the benefit of subsequent
5323 objfiles using the same BFD. */
5324 gdb_assert (per_bfd
->partial_symtabs
== nullptr);
5325 per_bfd
->partial_symtabs
= objfile
->partial_symtabs
;
5330 /* Type used to manage iterating over all CUs looking for a symbol for
5333 class dw2_debug_names_iterator
5336 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5337 gdb::optional
<block_enum
> block_index
,
5339 const char *name
, dwarf2_per_objfile
*per_objfile
)
5340 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5341 m_addr (find_vec_in_debug_names (map
, name
, per_objfile
)),
5342 m_per_objfile (per_objfile
)
5345 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5346 search_domain search
, uint32_t namei
, dwarf2_per_objfile
*per_objfile
)
5349 m_addr (find_vec_in_debug_names (map
, namei
, per_objfile
)),
5350 m_per_objfile (per_objfile
)
5353 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5354 block_enum block_index
, domain_enum domain
,
5355 uint32_t namei
, dwarf2_per_objfile
*per_objfile
)
5356 : m_map (map
), m_block_index (block_index
), m_domain (domain
),
5357 m_addr (find_vec_in_debug_names (map
, namei
, per_objfile
)),
5358 m_per_objfile (per_objfile
)
5361 /* Return the next matching CU or NULL if there are no more. */
5362 dwarf2_per_cu_data
*next ();
5365 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5367 dwarf2_per_objfile
*per_objfile
);
5368 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5370 dwarf2_per_objfile
*per_objfile
);
5372 /* The internalized form of .debug_names. */
5373 const mapped_debug_names
&m_map
;
5375 /* If set, only look for symbols that match that block. Valid values are
5376 GLOBAL_BLOCK and STATIC_BLOCK. */
5377 const gdb::optional
<block_enum
> m_block_index
;
5379 /* The kind of symbol we're looking for. */
5380 const domain_enum m_domain
= UNDEF_DOMAIN
;
5381 const search_domain m_search
= ALL_DOMAIN
;
5383 /* The list of CUs from the index entry of the symbol, or NULL if
5385 const gdb_byte
*m_addr
;
5387 dwarf2_per_objfile
*m_per_objfile
;
5391 mapped_debug_names::namei_to_name
5392 (uint32_t namei
, dwarf2_per_objfile
*per_objfile
) const
5394 const ULONGEST namei_string_offs
5395 = extract_unsigned_integer ((name_table_string_offs_reordered
5396 + namei
* offset_size
),
5399 return read_indirect_string_at_offset (per_objfile
, namei_string_offs
);
5402 /* Find a slot in .debug_names for the object named NAME. If NAME is
5403 found, return pointer to its pool data. If NAME cannot be found,
5407 dw2_debug_names_iterator::find_vec_in_debug_names
5408 (const mapped_debug_names
&map
, const char *name
,
5409 dwarf2_per_objfile
*per_objfile
)
5411 int (*cmp
) (const char *, const char *);
5413 gdb::unique_xmalloc_ptr
<char> without_params
;
5414 if (current_language
->la_language
== language_cplus
5415 || current_language
->la_language
== language_fortran
5416 || current_language
->la_language
== language_d
)
5418 /* NAME is already canonical. Drop any qualifiers as
5419 .debug_names does not contain any. */
5421 if (strchr (name
, '(') != NULL
)
5423 without_params
= cp_remove_params (name
);
5424 if (without_params
!= NULL
)
5425 name
= without_params
.get ();
5429 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5431 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5433 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5434 (map
.bucket_table_reordered
5435 + (full_hash
% map
.bucket_count
)), 4,
5436 map
.dwarf5_byte_order
);
5440 if (namei
>= map
.name_count
)
5442 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5444 namei
, map
.name_count
,
5445 objfile_name (per_objfile
->objfile
));
5451 const uint32_t namei_full_hash
5452 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5453 (map
.hash_table_reordered
+ namei
), 4,
5454 map
.dwarf5_byte_order
);
5455 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5458 if (full_hash
== namei_full_hash
)
5460 const char *const namei_string
= map
.namei_to_name (namei
, per_objfile
);
5462 #if 0 /* An expensive sanity check. */
5463 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5465 complaint (_("Wrong .debug_names hash for string at index %u "
5467 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5472 if (cmp (namei_string
, name
) == 0)
5474 const ULONGEST namei_entry_offs
5475 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5476 + namei
* map
.offset_size
),
5477 map
.offset_size
, map
.dwarf5_byte_order
);
5478 return map
.entry_pool
+ namei_entry_offs
;
5483 if (namei
>= map
.name_count
)
5489 dw2_debug_names_iterator::find_vec_in_debug_names
5490 (const mapped_debug_names
&map
, uint32_t namei
, dwarf2_per_objfile
*per_objfile
)
5492 if (namei
>= map
.name_count
)
5494 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5496 namei
, map
.name_count
,
5497 objfile_name (per_objfile
->objfile
));
5501 const ULONGEST namei_entry_offs
5502 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5503 + namei
* map
.offset_size
),
5504 map
.offset_size
, map
.dwarf5_byte_order
);
5505 return map
.entry_pool
+ namei_entry_offs
;
5508 /* See dw2_debug_names_iterator. */
5510 dwarf2_per_cu_data
*
5511 dw2_debug_names_iterator::next ()
5516 dwarf2_per_bfd
*per_bfd
= m_per_objfile
->per_bfd
;
5517 struct objfile
*objfile
= m_per_objfile
->objfile
;
5518 bfd
*const abfd
= objfile
->obfd
;
5522 unsigned int bytes_read
;
5523 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5524 m_addr
+= bytes_read
;
5528 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5529 if (indexval_it
== m_map
.abbrev_map
.cend ())
5531 complaint (_("Wrong .debug_names undefined abbrev code %s "
5533 pulongest (abbrev
), objfile_name (objfile
));
5536 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5537 enum class symbol_linkage
{
5541 } symbol_linkage_
= symbol_linkage::unknown
;
5542 dwarf2_per_cu_data
*per_cu
= NULL
;
5543 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5548 case DW_FORM_implicit_const
:
5549 ull
= attr
.implicit_const
;
5551 case DW_FORM_flag_present
:
5555 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5556 m_addr
+= bytes_read
;
5559 ull
= read_4_bytes (abfd
, m_addr
);
5563 ull
= read_8_bytes (abfd
, m_addr
);
5566 case DW_FORM_ref_sig8
:
5567 ull
= read_8_bytes (abfd
, m_addr
);
5571 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5572 dwarf_form_name (attr
.form
),
5573 objfile_name (objfile
));
5576 switch (attr
.dw_idx
)
5578 case DW_IDX_compile_unit
:
5579 /* Don't crash on bad data. */
5580 if (ull
>= m_per_objfile
->per_bfd
->all_comp_units
.size ())
5582 complaint (_(".debug_names entry has bad CU index %s"
5585 objfile_name (objfile
));
5588 per_cu
= per_bfd
->get_cutu (ull
);
5590 case DW_IDX_type_unit
:
5591 /* Don't crash on bad data. */
5592 if (ull
>= per_bfd
->all_type_units
.size ())
5594 complaint (_(".debug_names entry has bad TU index %s"
5597 objfile_name (objfile
));
5600 per_cu
= &per_bfd
->get_tu (ull
)->per_cu
;
5602 case DW_IDX_die_offset
:
5603 /* In a per-CU index (as opposed to a per-module index), index
5604 entries without CU attribute implicitly refer to the single CU. */
5606 per_cu
= per_bfd
->get_cu (0);
5608 case DW_IDX_GNU_internal
:
5609 if (!m_map
.augmentation_is_gdb
)
5611 symbol_linkage_
= symbol_linkage::static_
;
5613 case DW_IDX_GNU_external
:
5614 if (!m_map
.augmentation_is_gdb
)
5616 symbol_linkage_
= symbol_linkage::extern_
;
5621 /* Skip if already read in. */
5622 if (m_per_objfile
->symtab_set_p (per_cu
))
5625 /* Check static vs global. */
5626 if (symbol_linkage_
!= symbol_linkage::unknown
&& m_block_index
.has_value ())
5628 const bool want_static
= *m_block_index
== STATIC_BLOCK
;
5629 const bool symbol_is_static
=
5630 symbol_linkage_
== symbol_linkage::static_
;
5631 if (want_static
!= symbol_is_static
)
5635 /* Match dw2_symtab_iter_next, symbol_kind
5636 and debug_names::psymbol_tag. */
5640 switch (indexval
.dwarf_tag
)
5642 case DW_TAG_variable
:
5643 case DW_TAG_subprogram
:
5644 /* Some types are also in VAR_DOMAIN. */
5645 case DW_TAG_typedef
:
5646 case DW_TAG_structure_type
:
5653 switch (indexval
.dwarf_tag
)
5655 case DW_TAG_typedef
:
5656 case DW_TAG_structure_type
:
5663 switch (indexval
.dwarf_tag
)
5666 case DW_TAG_variable
:
5673 switch (indexval
.dwarf_tag
)
5685 /* Match dw2_expand_symtabs_matching, symbol_kind and
5686 debug_names::psymbol_tag. */
5689 case VARIABLES_DOMAIN
:
5690 switch (indexval
.dwarf_tag
)
5692 case DW_TAG_variable
:
5698 case FUNCTIONS_DOMAIN
:
5699 switch (indexval
.dwarf_tag
)
5701 case DW_TAG_subprogram
:
5708 switch (indexval
.dwarf_tag
)
5710 case DW_TAG_typedef
:
5711 case DW_TAG_structure_type
:
5717 case MODULES_DOMAIN
:
5718 switch (indexval
.dwarf_tag
)
5732 static struct compunit_symtab
*
5733 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, block_enum block_index
,
5734 const char *name
, domain_enum domain
)
5736 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
5738 const auto &mapp
= per_objfile
->per_bfd
->debug_names_table
;
5741 /* index is NULL if OBJF_READNOW. */
5744 const auto &map
= *mapp
;
5746 dw2_debug_names_iterator
iter (map
, block_index
, domain
, name
, per_objfile
);
5748 struct compunit_symtab
*stab_best
= NULL
;
5749 struct dwarf2_per_cu_data
*per_cu
;
5750 while ((per_cu
= iter
.next ()) != NULL
)
5752 struct symbol
*sym
, *with_opaque
= NULL
;
5753 compunit_symtab
*stab
5754 = dw2_instantiate_symtab (per_cu
, per_objfile
, false);
5755 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
5756 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
5758 sym
= block_find_symbol (block
, name
, domain
,
5759 block_find_non_opaque_type_preferred
,
5762 /* Some caution must be observed with overloaded functions and
5763 methods, since the index will not contain any overload
5764 information (but NAME might contain it). */
5767 && strcmp_iw (sym
->search_name (), name
) == 0)
5769 if (with_opaque
!= NULL
5770 && strcmp_iw (with_opaque
->search_name (), name
) == 0)
5773 /* Keep looking through other CUs. */
5779 /* This dumps minimal information about .debug_names. It is called
5780 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
5781 uses this to verify that .debug_names has been loaded. */
5784 dw2_debug_names_dump (struct objfile
*objfile
)
5786 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
5788 gdb_assert (per_objfile
->per_bfd
->using_index
);
5789 printf_filtered (".debug_names:");
5790 if (per_objfile
->per_bfd
->debug_names_table
)
5791 printf_filtered (" exists\n");
5793 printf_filtered (" faked for \"readnow\"\n");
5794 printf_filtered ("\n");
5798 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
5799 const char *func_name
)
5801 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
5803 /* per_objfile->per_bfd->debug_names_table is NULL if OBJF_READNOW. */
5804 if (per_objfile
->per_bfd
->debug_names_table
)
5806 const mapped_debug_names
&map
= *per_objfile
->per_bfd
->debug_names_table
;
5808 dw2_debug_names_iterator
iter (map
, {}, VAR_DOMAIN
, func_name
,
5811 struct dwarf2_per_cu_data
*per_cu
;
5812 while ((per_cu
= iter
.next ()) != NULL
)
5813 dw2_instantiate_symtab (per_cu
, per_objfile
, false);
5818 dw2_debug_names_map_matching_symbols
5819 (struct objfile
*objfile
,
5820 const lookup_name_info
&name
, domain_enum domain
,
5822 gdb::function_view
<symbol_found_callback_ftype
> callback
,
5823 symbol_compare_ftype
*ordered_compare
)
5825 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
5827 /* debug_names_table is NULL if OBJF_READNOW. */
5828 if (!per_objfile
->per_bfd
->debug_names_table
)
5831 mapped_debug_names
&map
= *per_objfile
->per_bfd
->debug_names_table
;
5832 const block_enum block_kind
= global
? GLOBAL_BLOCK
: STATIC_BLOCK
;
5834 const char *match_name
= name
.ada ().lookup_name ().c_str ();
5835 auto matcher
= [&] (const char *symname
)
5837 if (ordered_compare
== nullptr)
5839 return ordered_compare (symname
, match_name
) == 0;
5842 dw2_expand_symtabs_matching_symbol (map
, name
, matcher
, ALL_DOMAIN
,
5843 [&] (offset_type namei
)
5845 /* The name was matched, now expand corresponding CUs that were
5847 dw2_debug_names_iterator
iter (map
, block_kind
, domain
, namei
,
5850 struct dwarf2_per_cu_data
*per_cu
;
5851 while ((per_cu
= iter
.next ()) != NULL
)
5852 dw2_expand_symtabs_matching_one (per_cu
, per_objfile
, nullptr,
5857 /* It's a shame we couldn't do this inside the
5858 dw2_expand_symtabs_matching_symbol callback, but that skips CUs
5859 that have already been expanded. Instead, this loop matches what
5860 the psymtab code does. */
5861 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
5863 compunit_symtab
*symtab
= per_objfile
->get_symtab (per_cu
);
5864 if (symtab
!= nullptr)
5866 const struct block
*block
5867 = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (symtab
), block_kind
);
5868 if (!iterate_over_symbols_terminated (block
, name
,
5876 dw2_debug_names_expand_symtabs_matching
5877 (struct objfile
*objfile
,
5878 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5879 const lookup_name_info
*lookup_name
,
5880 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5881 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5882 enum search_domain kind
)
5884 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
5886 /* debug_names_table is NULL if OBJF_READNOW. */
5887 if (!per_objfile
->per_bfd
->debug_names_table
)
5890 dw_expand_symtabs_matching_file_matcher (per_objfile
, file_matcher
);
5892 if (symbol_matcher
== NULL
&& lookup_name
== NULL
)
5894 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
5898 dw2_expand_symtabs_matching_one (per_cu
, per_objfile
, file_matcher
,
5904 mapped_debug_names
&map
= *per_objfile
->per_bfd
->debug_names_table
;
5906 dw2_expand_symtabs_matching_symbol (map
, *lookup_name
,
5908 kind
, [&] (offset_type namei
)
5910 /* The name was matched, now expand corresponding CUs that were
5912 dw2_debug_names_iterator
iter (map
, kind
, namei
, per_objfile
);
5914 struct dwarf2_per_cu_data
*per_cu
;
5915 while ((per_cu
= iter
.next ()) != NULL
)
5916 dw2_expand_symtabs_matching_one (per_cu
, per_objfile
, file_matcher
,
5922 const struct quick_symbol_functions dwarf2_debug_names_functions
=
5925 dw2_find_last_source_symtab
,
5926 dw2_forget_cached_source_info
,
5927 dw2_map_symtabs_matching_filename
,
5928 dw2_debug_names_lookup_symbol
,
5931 dw2_debug_names_dump
,
5932 dw2_debug_names_expand_symtabs_for_function
,
5933 dw2_expand_all_symtabs
,
5934 dw2_expand_symtabs_with_fullname
,
5935 dw2_debug_names_map_matching_symbols
,
5936 dw2_debug_names_expand_symtabs_matching
,
5937 dw2_find_pc_sect_compunit_symtab
,
5939 dw2_map_symbol_filenames
5942 /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
5943 to either a dwarf2_per_bfd or dwz_file object. */
5945 template <typename T
>
5946 static gdb::array_view
<const gdb_byte
>
5947 get_gdb_index_contents_from_section (objfile
*obj
, T
*section_owner
)
5949 dwarf2_section_info
*section
= §ion_owner
->gdb_index
;
5951 if (section
->empty ())
5954 /* Older elfutils strip versions could keep the section in the main
5955 executable while splitting it for the separate debug info file. */
5956 if ((section
->get_flags () & SEC_HAS_CONTENTS
) == 0)
5959 section
->read (obj
);
5961 /* dwarf2_section_info::size is a bfd_size_type, while
5962 gdb::array_view works with size_t. On 32-bit hosts, with
5963 --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t
5964 is 32-bit. So we need an explicit narrowing conversion here.
5965 This is fine, because it's impossible to allocate or mmap an
5966 array/buffer larger than what size_t can represent. */
5967 return gdb::make_array_view (section
->buffer
, section
->size
);
5970 /* Lookup the index cache for the contents of the index associated to
5973 static gdb::array_view
<const gdb_byte
>
5974 get_gdb_index_contents_from_cache (objfile
*obj
, dwarf2_per_bfd
*dwarf2_per_bfd
)
5976 const bfd_build_id
*build_id
= build_id_bfd_get (obj
->obfd
);
5977 if (build_id
== nullptr)
5980 return global_index_cache
.lookup_gdb_index (build_id
,
5981 &dwarf2_per_bfd
->index_cache_res
);
5984 /* Same as the above, but for DWZ. */
5986 static gdb::array_view
<const gdb_byte
>
5987 get_gdb_index_contents_from_cache_dwz (objfile
*obj
, dwz_file
*dwz
)
5989 const bfd_build_id
*build_id
= build_id_bfd_get (dwz
->dwz_bfd
.get ());
5990 if (build_id
== nullptr)
5993 return global_index_cache
.lookup_gdb_index (build_id
, &dwz
->index_cache_res
);
5996 /* See symfile.h. */
5999 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
6001 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
6002 dwarf2_per_bfd
*per_bfd
= per_objfile
->per_bfd
;
6004 /* If we're about to read full symbols, don't bother with the
6005 indices. In this case we also don't care if some other debug
6006 format is making psymtabs, because they are all about to be
6008 if ((objfile
->flags
& OBJF_READNOW
))
6010 /* When using READNOW, the using_index flag (set below) indicates that
6011 PER_BFD was already initialized, when we loaded some other objfile. */
6012 if (per_bfd
->using_index
)
6014 *index_kind
= dw_index_kind::GDB_INDEX
;
6015 per_objfile
->resize_symtabs ();
6019 per_bfd
->using_index
= 1;
6020 create_all_comp_units (per_objfile
);
6021 create_all_type_units (per_objfile
);
6022 per_bfd
->quick_file_names_table
6023 = create_quick_file_names_table (per_bfd
->all_comp_units
.size ());
6024 per_objfile
->resize_symtabs ();
6026 for (int i
= 0; i
< (per_bfd
->all_comp_units
.size ()
6027 + per_bfd
->all_type_units
.size ()); ++i
)
6029 dwarf2_per_cu_data
*per_cu
= per_bfd
->get_cutu (i
);
6031 per_cu
->v
.quick
= OBSTACK_ZALLOC (&per_bfd
->obstack
,
6032 struct dwarf2_per_cu_quick_data
);
6035 /* Return 1 so that gdb sees the "quick" functions. However,
6036 these functions will be no-ops because we will have expanded
6038 *index_kind
= dw_index_kind::GDB_INDEX
;
6042 /* Was a debug names index already read when we processed an objfile sharing
6044 if (per_bfd
->debug_names_table
!= nullptr)
6046 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6047 per_objfile
->objfile
->partial_symtabs
= per_bfd
->partial_symtabs
;
6048 per_objfile
->resize_symtabs ();
6052 /* Was a GDB index already read when we processed an objfile sharing
6054 if (per_bfd
->index_table
!= nullptr)
6056 *index_kind
= dw_index_kind::GDB_INDEX
;
6057 per_objfile
->objfile
->partial_symtabs
= per_bfd
->partial_symtabs
;
6058 per_objfile
->resize_symtabs ();
6062 /* There might already be partial symtabs built for this BFD. This happens
6063 when loading the same binary twice with the index-cache enabled. If so,
6064 don't try to read an index. The objfile / per_objfile initialization will
6065 be completed in dwarf2_build_psymtabs, in the standard partial symtabs
6067 if (per_bfd
->partial_symtabs
!= nullptr)
6070 if (dwarf2_read_debug_names (per_objfile
))
6072 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6073 per_objfile
->resize_symtabs ();
6077 if (dwarf2_read_gdb_index (per_objfile
,
6078 get_gdb_index_contents_from_section
<struct dwarf2_per_bfd
>,
6079 get_gdb_index_contents_from_section
<dwz_file
>))
6081 *index_kind
= dw_index_kind::GDB_INDEX
;
6082 per_objfile
->resize_symtabs ();
6086 /* ... otherwise, try to find the index in the index cache. */
6087 if (dwarf2_read_gdb_index (per_objfile
,
6088 get_gdb_index_contents_from_cache
,
6089 get_gdb_index_contents_from_cache_dwz
))
6091 global_index_cache
.hit ();
6092 *index_kind
= dw_index_kind::GDB_INDEX
;
6093 per_objfile
->resize_symtabs ();
6097 global_index_cache
.miss ();
6103 /* Build a partial symbol table. */
6106 dwarf2_build_psymtabs (struct objfile
*objfile
)
6108 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
6109 dwarf2_per_bfd
*per_bfd
= per_objfile
->per_bfd
;
6111 if (per_bfd
->partial_symtabs
!= nullptr)
6113 /* Partial symbols were already read, so now we can simply
6115 objfile
->partial_symtabs
= per_bfd
->partial_symtabs
;
6116 per_objfile
->resize_symtabs ();
6120 init_psymbol_list (objfile
, 1024);
6124 /* This isn't really ideal: all the data we allocate on the
6125 objfile's obstack is still uselessly kept around. However,
6126 freeing it seems unsafe. */
6127 psymtab_discarder
psymtabs (objfile
);
6128 dwarf2_build_psymtabs_hard (per_objfile
);
6131 per_objfile
->resize_symtabs ();
6133 /* (maybe) store an index in the cache. */
6134 global_index_cache
.store (per_objfile
);
6136 catch (const gdb_exception_error
&except
)
6138 exception_print (gdb_stderr
, except
);
6141 /* Finish by setting the local reference to partial symtabs, so that
6142 we don't try to read them again if reading another objfile with the same
6143 BFD. If we can't in fact share, this won't make a difference anyway as
6144 the dwarf2_per_bfd object won't be shared. */
6145 per_bfd
->partial_symtabs
= objfile
->partial_symtabs
;
6148 /* Find the base address of the compilation unit for range lists and
6149 location lists. It will normally be specified by DW_AT_low_pc.
6150 In DWARF-3 draft 4, the base address could be overridden by
6151 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6152 compilation units with discontinuous ranges. */
6155 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6157 struct attribute
*attr
;
6159 cu
->base_address
.reset ();
6161 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6162 if (attr
!= nullptr)
6163 cu
->base_address
= attr
->as_address ();
6166 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6167 if (attr
!= nullptr)
6168 cu
->base_address
= attr
->as_address ();
6172 /* Helper function that returns the proper abbrev section for
6175 static struct dwarf2_section_info
*
6176 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6178 struct dwarf2_section_info
*abbrev
;
6179 dwarf2_per_bfd
*per_bfd
= this_cu
->per_bfd
;
6181 if (this_cu
->is_dwz
)
6182 abbrev
= &dwarf2_get_dwz_file (per_bfd
)->abbrev
;
6184 abbrev
= &per_bfd
->abbrev
;
6189 /* Fetch the abbreviation table offset from a comp or type unit header. */
6192 read_abbrev_offset (dwarf2_per_objfile
*per_objfile
,
6193 struct dwarf2_section_info
*section
,
6194 sect_offset sect_off
)
6196 bfd
*abfd
= section
->get_bfd_owner ();
6197 const gdb_byte
*info_ptr
;
6198 unsigned int initial_length_size
, offset_size
;
6201 section
->read (per_objfile
->objfile
);
6202 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6203 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6204 offset_size
= initial_length_size
== 4 ? 4 : 8;
6205 info_ptr
+= initial_length_size
;
6207 version
= read_2_bytes (abfd
, info_ptr
);
6211 /* Skip unit type and address size. */
6215 return (sect_offset
) read_offset (abfd
, info_ptr
, offset_size
);
6218 /* A partial symtab that is used only for include files. */
6219 struct dwarf2_include_psymtab
: public partial_symtab
6221 dwarf2_include_psymtab (const char *filename
, struct objfile
*objfile
)
6222 : partial_symtab (filename
, objfile
)
6226 void read_symtab (struct objfile
*objfile
) override
6228 /* It's an include file, no symbols to read for it.
6229 Everything is in the includer symtab. */
6231 /* The expansion of a dwarf2_include_psymtab is just a trigger for
6232 expansion of the includer psymtab. We use the dependencies[0] field to
6233 model the includer. But if we go the regular route of calling
6234 expand_psymtab here, and having expand_psymtab call expand_dependencies
6235 to expand the includer, we'll only use expand_psymtab on the includer
6236 (making it a non-toplevel psymtab), while if we expand the includer via
6237 another path, we'll use read_symtab (making it a toplevel psymtab).
6238 So, don't pretend a dwarf2_include_psymtab is an actual toplevel
6239 psymtab, and trigger read_symtab on the includer here directly. */
6240 includer ()->read_symtab (objfile
);
6243 void expand_psymtab (struct objfile
*objfile
) override
6245 /* This is not called by read_symtab, and should not be called by any
6246 expand_dependencies. */
6250 bool readin_p (struct objfile
*objfile
) const override
6252 return includer ()->readin_p (objfile
);
6255 compunit_symtab
*get_compunit_symtab (struct objfile
*objfile
) const override
6261 partial_symtab
*includer () const
6263 /* An include psymtab has exactly one dependency: the psymtab that
6265 gdb_assert (this->number_of_dependencies
== 1);
6266 return this->dependencies
[0];
6270 /* Allocate a new partial symtab for file named NAME and mark this new
6271 partial symtab as being an include of PST. */
6274 dwarf2_create_include_psymtab (const char *name
, dwarf2_psymtab
*pst
,
6275 struct objfile
*objfile
)
6277 dwarf2_include_psymtab
*subpst
= new dwarf2_include_psymtab (name
, objfile
);
6279 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6280 subpst
->dirname
= pst
->dirname
;
6282 subpst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (1);
6283 subpst
->dependencies
[0] = pst
;
6284 subpst
->number_of_dependencies
= 1;
6287 /* Read the Line Number Program data and extract the list of files
6288 included by the source file represented by PST. Build an include
6289 partial symtab for each of these included files. */
6292 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6293 struct die_info
*die
,
6294 dwarf2_psymtab
*pst
)
6297 struct attribute
*attr
;
6299 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6300 if (attr
!= nullptr)
6301 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6303 return; /* No linetable, so no includes. */
6305 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6306 that we pass in the raw text_low here; that is ok because we're
6307 only decoding the line table to make include partial symtabs, and
6308 so the addresses aren't really used. */
6309 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6310 pst
->raw_text_low (), 1);
6314 hash_signatured_type (const void *item
)
6316 const struct signatured_type
*sig_type
6317 = (const struct signatured_type
*) item
;
6319 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6320 return sig_type
->signature
;
6324 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6326 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6327 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6329 return lhs
->signature
== rhs
->signature
;
6332 /* Allocate a hash table for signatured types. */
6335 allocate_signatured_type_table ()
6337 return htab_up (htab_create_alloc (41,
6338 hash_signatured_type
,
6340 NULL
, xcalloc
, xfree
));
6343 /* A helper function to add a signatured type CU to a table. */
6346 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6348 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6349 std::vector
<signatured_type
*> *all_type_units
6350 = (std::vector
<signatured_type
*> *) datum
;
6352 all_type_units
->push_back (sigt
);
6357 /* A helper for create_debug_types_hash_table. Read types from SECTION
6358 and fill them into TYPES_HTAB. It will process only type units,
6359 therefore DW_UT_type. */
6362 create_debug_type_hash_table (dwarf2_per_objfile
*per_objfile
,
6363 struct dwo_file
*dwo_file
,
6364 dwarf2_section_info
*section
, htab_up
&types_htab
,
6365 rcuh_kind section_kind
)
6367 struct objfile
*objfile
= per_objfile
->objfile
;
6368 struct dwarf2_section_info
*abbrev_section
;
6370 const gdb_byte
*info_ptr
, *end_ptr
;
6372 abbrev_section
= (dwo_file
!= NULL
6373 ? &dwo_file
->sections
.abbrev
6374 : &per_objfile
->per_bfd
->abbrev
);
6376 if (dwarf_read_debug
)
6377 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6378 section
->get_name (),
6379 abbrev_section
->get_file_name ());
6381 section
->read (objfile
);
6382 info_ptr
= section
->buffer
;
6384 if (info_ptr
== NULL
)
6387 /* We can't set abfd until now because the section may be empty or
6388 not present, in which case the bfd is unknown. */
6389 abfd
= section
->get_bfd_owner ();
6391 /* We don't use cutu_reader here because we don't need to read
6392 any dies: the signature is in the header. */
6394 end_ptr
= info_ptr
+ section
->size
;
6395 while (info_ptr
< end_ptr
)
6397 struct signatured_type
*sig_type
;
6398 struct dwo_unit
*dwo_tu
;
6400 const gdb_byte
*ptr
= info_ptr
;
6401 struct comp_unit_head header
;
6402 unsigned int length
;
6404 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6406 /* Initialize it due to a false compiler warning. */
6407 header
.signature
= -1;
6408 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6410 /* We need to read the type's signature in order to build the hash
6411 table, but we don't need anything else just yet. */
6413 ptr
= read_and_check_comp_unit_head (per_objfile
, &header
, section
,
6414 abbrev_section
, ptr
, section_kind
);
6416 length
= header
.get_length ();
6418 /* Skip dummy type units. */
6419 if (ptr
>= info_ptr
+ length
6420 || peek_abbrev_code (abfd
, ptr
) == 0
6421 || (header
.unit_type
!= DW_UT_type
6422 && header
.unit_type
!= DW_UT_split_type
))
6428 if (types_htab
== NULL
)
6431 types_htab
= allocate_dwo_unit_table ();
6433 types_htab
= allocate_signatured_type_table ();
6439 dwo_tu
= OBSTACK_ZALLOC (&per_objfile
->per_bfd
->obstack
, dwo_unit
);
6440 dwo_tu
->dwo_file
= dwo_file
;
6441 dwo_tu
->signature
= header
.signature
;
6442 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6443 dwo_tu
->section
= section
;
6444 dwo_tu
->sect_off
= sect_off
;
6445 dwo_tu
->length
= length
;
6449 /* N.B.: type_offset is not usable if this type uses a DWO file.
6450 The real type_offset is in the DWO file. */
6452 sig_type
= per_objfile
->per_bfd
->allocate_signatured_type ();
6453 sig_type
->signature
= header
.signature
;
6454 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6455 sig_type
->per_cu
.is_debug_types
= 1;
6456 sig_type
->per_cu
.section
= section
;
6457 sig_type
->per_cu
.sect_off
= sect_off
;
6458 sig_type
->per_cu
.length
= length
;
6461 slot
= htab_find_slot (types_htab
.get (),
6462 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6464 gdb_assert (slot
!= NULL
);
6467 sect_offset dup_sect_off
;
6471 const struct dwo_unit
*dup_tu
6472 = (const struct dwo_unit
*) *slot
;
6474 dup_sect_off
= dup_tu
->sect_off
;
6478 const struct signatured_type
*dup_tu
6479 = (const struct signatured_type
*) *slot
;
6481 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6484 complaint (_("debug type entry at offset %s is duplicate to"
6485 " the entry at offset %s, signature %s"),
6486 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6487 hex_string (header
.signature
));
6489 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6491 if (dwarf_read_debug
> 1)
6492 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6493 sect_offset_str (sect_off
),
6494 hex_string (header
.signature
));
6500 /* Create the hash table of all entries in the .debug_types
6501 (or .debug_types.dwo) section(s).
6502 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6503 otherwise it is NULL.
6505 The result is a pointer to the hash table or NULL if there are no types.
6507 Note: This function processes DWO files only, not DWP files. */
6510 create_debug_types_hash_table (dwarf2_per_objfile
*per_objfile
,
6511 struct dwo_file
*dwo_file
,
6512 gdb::array_view
<dwarf2_section_info
> type_sections
,
6513 htab_up
&types_htab
)
6515 for (dwarf2_section_info
§ion
: type_sections
)
6516 create_debug_type_hash_table (per_objfile
, dwo_file
, §ion
, types_htab
,
6520 /* Create the hash table of all entries in the .debug_types section,
6521 and initialize all_type_units.
6522 The result is zero if there is an error (e.g. missing .debug_types section),
6523 otherwise non-zero. */
6526 create_all_type_units (dwarf2_per_objfile
*per_objfile
)
6530 create_debug_type_hash_table (per_objfile
, NULL
, &per_objfile
->per_bfd
->info
,
6531 types_htab
, rcuh_kind::COMPILE
);
6532 create_debug_types_hash_table (per_objfile
, NULL
, per_objfile
->per_bfd
->types
,
6534 if (types_htab
== NULL
)
6536 per_objfile
->per_bfd
->signatured_types
= NULL
;
6540 per_objfile
->per_bfd
->signatured_types
= std::move (types_htab
);
6542 gdb_assert (per_objfile
->per_bfd
->all_type_units
.empty ());
6543 per_objfile
->per_bfd
->all_type_units
.reserve
6544 (htab_elements (per_objfile
->per_bfd
->signatured_types
.get ()));
6546 htab_traverse_noresize (per_objfile
->per_bfd
->signatured_types
.get (),
6547 add_signatured_type_cu_to_table
,
6548 &per_objfile
->per_bfd
->all_type_units
);
6553 /* Add an entry for signature SIG to dwarf2_per_objfile->per_bfd->signatured_types.
6554 If SLOT is non-NULL, it is the entry to use in the hash table.
6555 Otherwise we find one. */
6557 static struct signatured_type
*
6558 add_type_unit (dwarf2_per_objfile
*per_objfile
, ULONGEST sig
, void **slot
)
6560 if (per_objfile
->per_bfd
->all_type_units
.size ()
6561 == per_objfile
->per_bfd
->all_type_units
.capacity ())
6562 ++per_objfile
->per_bfd
->tu_stats
.nr_all_type_units_reallocs
;
6564 signatured_type
*sig_type
= per_objfile
->per_bfd
->allocate_signatured_type ();
6566 per_objfile
->resize_symtabs ();
6568 per_objfile
->per_bfd
->all_type_units
.push_back (sig_type
);
6569 sig_type
->signature
= sig
;
6570 sig_type
->per_cu
.is_debug_types
= 1;
6571 if (per_objfile
->per_bfd
->using_index
)
6573 sig_type
->per_cu
.v
.quick
=
6574 OBSTACK_ZALLOC (&per_objfile
->per_bfd
->obstack
,
6575 struct dwarf2_per_cu_quick_data
);
6580 slot
= htab_find_slot (per_objfile
->per_bfd
->signatured_types
.get (),
6583 gdb_assert (*slot
== NULL
);
6585 /* The rest of sig_type must be filled in by the caller. */
6589 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6590 Fill in SIG_ENTRY with DWO_ENTRY. */
6593 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
*per_objfile
,
6594 struct signatured_type
*sig_entry
,
6595 struct dwo_unit
*dwo_entry
)
6597 dwarf2_per_bfd
*per_bfd
= per_objfile
->per_bfd
;
6599 /* Make sure we're not clobbering something we don't expect to. */
6600 gdb_assert (! sig_entry
->per_cu
.queued
);
6601 gdb_assert (per_objfile
->get_cu (&sig_entry
->per_cu
) == NULL
);
6602 if (per_bfd
->using_index
)
6604 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6605 gdb_assert (!per_objfile
->symtab_set_p (&sig_entry
->per_cu
));
6608 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6609 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6610 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6611 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6612 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6614 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6615 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6616 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6617 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6618 sig_entry
->per_cu
.per_bfd
= per_bfd
;
6619 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6620 sig_entry
->dwo_unit
= dwo_entry
;
6623 /* Subroutine of lookup_signatured_type.
6624 If we haven't read the TU yet, create the signatured_type data structure
6625 for a TU to be read in directly from a DWO file, bypassing the stub.
6626 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6627 using .gdb_index, then when reading a CU we want to stay in the DWO file
6628 containing that CU. Otherwise we could end up reading several other DWO
6629 files (due to comdat folding) to process the transitive closure of all the
6630 mentioned TUs, and that can be slow. The current DWO file will have every
6631 type signature that it needs.
6632 We only do this for .gdb_index because in the psymtab case we already have
6633 to read all the DWOs to build the type unit groups. */
6635 static struct signatured_type
*
6636 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6638 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
6639 struct dwo_file
*dwo_file
;
6640 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6641 struct signatured_type find_sig_entry
, *sig_entry
;
6644 gdb_assert (cu
->dwo_unit
&& per_objfile
->per_bfd
->using_index
);
6646 /* If TU skeletons have been removed then we may not have read in any
6648 if (per_objfile
->per_bfd
->signatured_types
== NULL
)
6649 per_objfile
->per_bfd
->signatured_types
= allocate_signatured_type_table ();
6651 /* We only ever need to read in one copy of a signatured type.
6652 Use the global signatured_types array to do our own comdat-folding
6653 of types. If this is the first time we're reading this TU, and
6654 the TU has an entry in .gdb_index, replace the recorded data from
6655 .gdb_index with this TU. */
6657 find_sig_entry
.signature
= sig
;
6658 slot
= htab_find_slot (per_objfile
->per_bfd
->signatured_types
.get (),
6659 &find_sig_entry
, INSERT
);
6660 sig_entry
= (struct signatured_type
*) *slot
;
6662 /* We can get here with the TU already read, *or* in the process of being
6663 read. Don't reassign the global entry to point to this DWO if that's
6664 the case. Also note that if the TU is already being read, it may not
6665 have come from a DWO, the program may be a mix of Fission-compiled
6666 code and non-Fission-compiled code. */
6668 /* Have we already tried to read this TU?
6669 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6670 needn't exist in the global table yet). */
6671 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6674 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6675 dwo_unit of the TU itself. */
6676 dwo_file
= cu
->dwo_unit
->dwo_file
;
6678 /* Ok, this is the first time we're reading this TU. */
6679 if (dwo_file
->tus
== NULL
)
6681 find_dwo_entry
.signature
= sig
;
6682 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
6684 if (dwo_entry
== NULL
)
6687 /* If the global table doesn't have an entry for this TU, add one. */
6688 if (sig_entry
== NULL
)
6689 sig_entry
= add_type_unit (per_objfile
, sig
, slot
);
6691 fill_in_sig_entry_from_dwo_entry (per_objfile
, sig_entry
, dwo_entry
);
6692 sig_entry
->per_cu
.tu_read
= 1;
6696 /* Subroutine of lookup_signatured_type.
6697 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6698 then try the DWP file. If the TU stub (skeleton) has been removed then
6699 it won't be in .gdb_index. */
6701 static struct signatured_type
*
6702 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6704 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
6705 struct dwp_file
*dwp_file
= get_dwp_file (per_objfile
);
6706 struct dwo_unit
*dwo_entry
;
6707 struct signatured_type find_sig_entry
, *sig_entry
;
6710 gdb_assert (cu
->dwo_unit
&& per_objfile
->per_bfd
->using_index
);
6711 gdb_assert (dwp_file
!= NULL
);
6713 /* If TU skeletons have been removed then we may not have read in any
6715 if (per_objfile
->per_bfd
->signatured_types
== NULL
)
6716 per_objfile
->per_bfd
->signatured_types
= allocate_signatured_type_table ();
6718 find_sig_entry
.signature
= sig
;
6719 slot
= htab_find_slot (per_objfile
->per_bfd
->signatured_types
.get (),
6720 &find_sig_entry
, INSERT
);
6721 sig_entry
= (struct signatured_type
*) *slot
;
6723 /* Have we already tried to read this TU?
6724 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6725 needn't exist in the global table yet). */
6726 if (sig_entry
!= NULL
)
6729 if (dwp_file
->tus
== NULL
)
6731 dwo_entry
= lookup_dwo_unit_in_dwp (per_objfile
, dwp_file
, NULL
, sig
,
6732 1 /* is_debug_types */);
6733 if (dwo_entry
== NULL
)
6736 sig_entry
= add_type_unit (per_objfile
, sig
, slot
);
6737 fill_in_sig_entry_from_dwo_entry (per_objfile
, sig_entry
, dwo_entry
);
6742 /* Lookup a signature based type for DW_FORM_ref_sig8.
6743 Returns NULL if signature SIG is not present in the table.
6744 It is up to the caller to complain about this. */
6746 static struct signatured_type
*
6747 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6749 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
6751 if (cu
->dwo_unit
&& per_objfile
->per_bfd
->using_index
)
6753 /* We're in a DWO/DWP file, and we're using .gdb_index.
6754 These cases require special processing. */
6755 if (get_dwp_file (per_objfile
) == NULL
)
6756 return lookup_dwo_signatured_type (cu
, sig
);
6758 return lookup_dwp_signatured_type (cu
, sig
);
6762 struct signatured_type find_entry
, *entry
;
6764 if (per_objfile
->per_bfd
->signatured_types
== NULL
)
6766 find_entry
.signature
= sig
;
6767 entry
= ((struct signatured_type
*)
6768 htab_find (per_objfile
->per_bfd
->signatured_types
.get (),
6774 /* Low level DIE reading support. */
6776 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
6779 init_cu_die_reader (struct die_reader_specs
*reader
,
6780 struct dwarf2_cu
*cu
,
6781 struct dwarf2_section_info
*section
,
6782 struct dwo_file
*dwo_file
,
6783 struct abbrev_table
*abbrev_table
)
6785 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
6786 reader
->abfd
= section
->get_bfd_owner ();
6788 reader
->dwo_file
= dwo_file
;
6789 reader
->die_section
= section
;
6790 reader
->buffer
= section
->buffer
;
6791 reader
->buffer_end
= section
->buffer
+ section
->size
;
6792 reader
->abbrev_table
= abbrev_table
;
6795 /* Subroutine of cutu_reader to simplify it.
6796 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
6797 There's just a lot of work to do, and cutu_reader is big enough
6800 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
6801 from it to the DIE in the DWO. If NULL we are skipping the stub.
6802 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
6803 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
6804 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
6805 STUB_COMP_DIR may be non-NULL.
6806 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE
6807 are filled in with the info of the DIE from the DWO file.
6808 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
6809 from the dwo. Since *RESULT_READER references this abbrev table, it must be
6810 kept around for at least as long as *RESULT_READER.
6812 The result is non-zero if a valid (non-dummy) DIE was found. */
6815 read_cutu_die_from_dwo (dwarf2_cu
*cu
,
6816 struct dwo_unit
*dwo_unit
,
6817 struct die_info
*stub_comp_unit_die
,
6818 const char *stub_comp_dir
,
6819 struct die_reader_specs
*result_reader
,
6820 const gdb_byte
**result_info_ptr
,
6821 struct die_info
**result_comp_unit_die
,
6822 abbrev_table_up
*result_dwo_abbrev_table
)
6824 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
6825 dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
6826 struct objfile
*objfile
= per_objfile
->objfile
;
6828 const gdb_byte
*begin_info_ptr
, *info_ptr
;
6829 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
6830 int i
,num_extra_attrs
;
6831 struct dwarf2_section_info
*dwo_abbrev_section
;
6832 struct die_info
*comp_unit_die
;
6834 /* At most one of these may be provided. */
6835 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
6837 /* These attributes aren't processed until later:
6838 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
6839 DW_AT_comp_dir is used now, to find the DWO file, but it is also
6840 referenced later. However, these attributes are found in the stub
6841 which we won't have later. In order to not impose this complication
6842 on the rest of the code, we read them here and copy them to the
6851 if (stub_comp_unit_die
!= NULL
)
6853 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
6855 if (!per_cu
->is_debug_types
)
6856 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
6857 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
6858 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
6859 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
6860 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
6862 cu
->addr_base
= stub_comp_unit_die
->addr_base ();
6864 /* There should be a DW_AT_rnglists_base (DW_AT_GNU_ranges_base) attribute
6865 here (if needed). We need the value before we can process
6867 cu
->ranges_base
= stub_comp_unit_die
->ranges_base ();
6869 else if (stub_comp_dir
!= NULL
)
6871 /* Reconstruct the comp_dir attribute to simplify the code below. */
6872 comp_dir
= OBSTACK_ZALLOC (&cu
->comp_unit_obstack
, struct attribute
);
6873 comp_dir
->name
= DW_AT_comp_dir
;
6874 comp_dir
->form
= DW_FORM_string
;
6875 comp_dir
->set_string_noncanonical (stub_comp_dir
);
6878 /* Set up for reading the DWO CU/TU. */
6879 cu
->dwo_unit
= dwo_unit
;
6880 dwarf2_section_info
*section
= dwo_unit
->section
;
6881 section
->read (objfile
);
6882 abfd
= section
->get_bfd_owner ();
6883 begin_info_ptr
= info_ptr
= (section
->buffer
6884 + to_underlying (dwo_unit
->sect_off
));
6885 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
6887 if (per_cu
->is_debug_types
)
6889 signatured_type
*sig_type
= (struct signatured_type
*) per_cu
;
6891 info_ptr
= read_and_check_comp_unit_head (per_objfile
, &cu
->header
,
6892 section
, dwo_abbrev_section
,
6893 info_ptr
, rcuh_kind::TYPE
);
6894 /* This is not an assert because it can be caused by bad debug info. */
6895 if (sig_type
->signature
!= cu
->header
.signature
)
6897 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
6898 " TU at offset %s [in module %s]"),
6899 hex_string (sig_type
->signature
),
6900 hex_string (cu
->header
.signature
),
6901 sect_offset_str (dwo_unit
->sect_off
),
6902 bfd_get_filename (abfd
));
6904 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6905 /* For DWOs coming from DWP files, we don't know the CU length
6906 nor the type's offset in the TU until now. */
6907 dwo_unit
->length
= cu
->header
.get_length ();
6908 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
6910 /* Establish the type offset that can be used to lookup the type.
6911 For DWO files, we don't know it until now. */
6912 sig_type
->type_offset_in_section
6913 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
6917 info_ptr
= read_and_check_comp_unit_head (per_objfile
, &cu
->header
,
6918 section
, dwo_abbrev_section
,
6919 info_ptr
, rcuh_kind::COMPILE
);
6920 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
6921 /* For DWOs coming from DWP files, we don't know the CU length
6923 dwo_unit
->length
= cu
->header
.get_length ();
6926 *result_dwo_abbrev_table
6927 = abbrev_table::read (objfile
, dwo_abbrev_section
,
6928 cu
->header
.abbrev_sect_off
);
6929 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
6930 result_dwo_abbrev_table
->get ());
6932 /* Read in the die, but leave space to copy over the attributes
6933 from the stub. This has the benefit of simplifying the rest of
6934 the code - all the work to maintain the illusion of a single
6935 DW_TAG_{compile,type}_unit DIE is done here. */
6936 num_extra_attrs
= ((stmt_list
!= NULL
)
6940 + (comp_dir
!= NULL
));
6941 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
6944 /* Copy over the attributes from the stub to the DIE we just read in. */
6945 comp_unit_die
= *result_comp_unit_die
;
6946 i
= comp_unit_die
->num_attrs
;
6947 if (stmt_list
!= NULL
)
6948 comp_unit_die
->attrs
[i
++] = *stmt_list
;
6950 comp_unit_die
->attrs
[i
++] = *low_pc
;
6951 if (high_pc
!= NULL
)
6952 comp_unit_die
->attrs
[i
++] = *high_pc
;
6954 comp_unit_die
->attrs
[i
++] = *ranges
;
6955 if (comp_dir
!= NULL
)
6956 comp_unit_die
->attrs
[i
++] = *comp_dir
;
6957 comp_unit_die
->num_attrs
+= num_extra_attrs
;
6959 if (dwarf_die_debug
)
6961 fprintf_unfiltered (gdb_stdlog
,
6962 "Read die from %s@0x%x of %s:\n",
6963 section
->get_name (),
6964 (unsigned) (begin_info_ptr
- section
->buffer
),
6965 bfd_get_filename (abfd
));
6966 dump_die (comp_unit_die
, dwarf_die_debug
);
6969 /* Skip dummy compilation units. */
6970 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
6971 || peek_abbrev_code (abfd
, info_ptr
) == 0)
6974 *result_info_ptr
= info_ptr
;
6978 /* Return the signature of the compile unit, if found. In DWARF 4 and before,
6979 the signature is in the DW_AT_GNU_dwo_id attribute. In DWARF 5 and later, the
6980 signature is part of the header. */
6981 static gdb::optional
<ULONGEST
>
6982 lookup_dwo_id (struct dwarf2_cu
*cu
, struct die_info
* comp_unit_die
)
6984 if (cu
->header
.version
>= 5)
6985 return cu
->header
.signature
;
6986 struct attribute
*attr
;
6987 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
6988 if (attr
== nullptr)
6989 return gdb::optional
<ULONGEST
> ();
6990 return DW_UNSND (attr
);
6993 /* Subroutine of cutu_reader to simplify it.
6994 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
6995 Returns NULL if the specified DWO unit cannot be found. */
6997 static struct dwo_unit
*
6998 lookup_dwo_unit (dwarf2_cu
*cu
, die_info
*comp_unit_die
, const char *dwo_name
)
7000 dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7001 struct dwo_unit
*dwo_unit
;
7002 const char *comp_dir
;
7004 gdb_assert (cu
!= NULL
);
7006 /* Yeah, we look dwo_name up again, but it simplifies the code. */
7007 dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
7008 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7010 if (per_cu
->is_debug_types
)
7011 dwo_unit
= lookup_dwo_type_unit (cu
, dwo_name
, comp_dir
);
7014 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
7016 if (!signature
.has_value ())
7017 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
7019 dwo_name
, bfd_get_filename (per_cu
->per_bfd
->obfd
));
7021 dwo_unit
= lookup_dwo_comp_unit (cu
, dwo_name
, comp_dir
, *signature
);
7027 /* Subroutine of cutu_reader to simplify it.
7028 See it for a description of the parameters.
7029 Read a TU directly from a DWO file, bypassing the stub. */
7032 cutu_reader::init_tu_and_read_dwo_dies (dwarf2_per_cu_data
*this_cu
,
7033 dwarf2_per_objfile
*per_objfile
,
7034 dwarf2_cu
*existing_cu
)
7036 struct signatured_type
*sig_type
;
7038 /* Verify we can do the following downcast, and that we have the
7040 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
7041 sig_type
= (struct signatured_type
*) this_cu
;
7042 gdb_assert (sig_type
->dwo_unit
!= NULL
);
7046 if (existing_cu
!= nullptr)
7049 gdb_assert (cu
->dwo_unit
== sig_type
->dwo_unit
);
7050 /* There's no need to do the rereading_dwo_cu handling that
7051 cutu_reader does since we don't read the stub. */
7055 /* If an existing_cu is provided, a dwarf2_cu must not exist for this_cu
7056 in per_objfile yet. */
7057 gdb_assert (per_objfile
->get_cu (this_cu
) == nullptr);
7058 m_new_cu
.reset (new dwarf2_cu (this_cu
, per_objfile
));
7059 cu
= m_new_cu
.get ();
7062 /* A future optimization, if needed, would be to use an existing
7063 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
7064 could share abbrev tables. */
7066 if (read_cutu_die_from_dwo (cu
, sig_type
->dwo_unit
,
7067 NULL
/* stub_comp_unit_die */,
7068 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
7071 &m_dwo_abbrev_table
) == 0)
7078 /* Initialize a CU (or TU) and read its DIEs.
7079 If the CU defers to a DWO file, read the DWO file as well.
7081 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
7082 Otherwise the table specified in the comp unit header is read in and used.
7083 This is an optimization for when we already have the abbrev table.
7085 If EXISTING_CU is non-NULL, then use it. Otherwise, a new CU is
7088 cutu_reader::cutu_reader (dwarf2_per_cu_data
*this_cu
,
7089 dwarf2_per_objfile
*per_objfile
,
7090 struct abbrev_table
*abbrev_table
,
7091 dwarf2_cu
*existing_cu
,
7093 : die_reader_specs
{},
7096 struct objfile
*objfile
= per_objfile
->objfile
;
7097 struct dwarf2_section_info
*section
= this_cu
->section
;
7098 bfd
*abfd
= section
->get_bfd_owner ();
7099 const gdb_byte
*begin_info_ptr
;
7100 struct signatured_type
*sig_type
= NULL
;
7101 struct dwarf2_section_info
*abbrev_section
;
7102 /* Non-zero if CU currently points to a DWO file and we need to
7103 reread it. When this happens we need to reread the skeleton die
7104 before we can reread the DWO file (this only applies to CUs, not TUs). */
7105 int rereading_dwo_cu
= 0;
7107 if (dwarf_die_debug
)
7108 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7109 this_cu
->is_debug_types
? "type" : "comp",
7110 sect_offset_str (this_cu
->sect_off
));
7112 /* If we're reading a TU directly from a DWO file, including a virtual DWO
7113 file (instead of going through the stub), short-circuit all of this. */
7114 if (this_cu
->reading_dwo_directly
)
7116 /* Narrow down the scope of possibilities to have to understand. */
7117 gdb_assert (this_cu
->is_debug_types
);
7118 gdb_assert (abbrev_table
== NULL
);
7119 init_tu_and_read_dwo_dies (this_cu
, per_objfile
, existing_cu
);
7123 /* This is cheap if the section is already read in. */
7124 section
->read (objfile
);
7126 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7128 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
7132 if (existing_cu
!= nullptr)
7135 /* If this CU is from a DWO file we need to start over, we need to
7136 refetch the attributes from the skeleton CU.
7137 This could be optimized by retrieving those attributes from when we
7138 were here the first time: the previous comp_unit_die was stored in
7139 comp_unit_obstack. But there's no data yet that we need this
7141 if (cu
->dwo_unit
!= NULL
)
7142 rereading_dwo_cu
= 1;
7146 /* If an existing_cu is provided, a dwarf2_cu must not exist for this_cu
7147 in per_objfile yet. */
7148 gdb_assert (per_objfile
->get_cu (this_cu
) == nullptr);
7149 m_new_cu
.reset (new dwarf2_cu (this_cu
, per_objfile
));
7150 cu
= m_new_cu
.get ();
7153 /* Get the header. */
7154 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7156 /* We already have the header, there's no need to read it in again. */
7157 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7161 if (this_cu
->is_debug_types
)
7163 info_ptr
= read_and_check_comp_unit_head (per_objfile
, &cu
->header
,
7164 section
, abbrev_section
,
7165 info_ptr
, rcuh_kind::TYPE
);
7167 /* Since per_cu is the first member of struct signatured_type,
7168 we can go from a pointer to one to a pointer to the other. */
7169 sig_type
= (struct signatured_type
*) this_cu
;
7170 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7171 gdb_assert (sig_type
->type_offset_in_tu
7172 == cu
->header
.type_cu_offset_in_tu
);
7173 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7175 /* LENGTH has not been set yet for type units if we're
7176 using .gdb_index. */
7177 this_cu
->length
= cu
->header
.get_length ();
7179 /* Establish the type offset that can be used to lookup the type. */
7180 sig_type
->type_offset_in_section
=
7181 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7183 this_cu
->dwarf_version
= cu
->header
.version
;
7187 info_ptr
= read_and_check_comp_unit_head (per_objfile
, &cu
->header
,
7188 section
, abbrev_section
,
7190 rcuh_kind::COMPILE
);
7192 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7193 if (this_cu
->length
== 0)
7194 this_cu
->length
= cu
->header
.get_length ();
7196 gdb_assert (this_cu
->length
== cu
->header
.get_length ());
7197 this_cu
->dwarf_version
= cu
->header
.version
;
7201 /* Skip dummy compilation units. */
7202 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7203 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7209 /* If we don't have them yet, read the abbrevs for this compilation unit.
7210 And if we need to read them now, make sure they're freed when we're
7212 if (abbrev_table
!= NULL
)
7213 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7216 m_abbrev_table_holder
7217 = abbrev_table::read (objfile
, abbrev_section
,
7218 cu
->header
.abbrev_sect_off
);
7219 abbrev_table
= m_abbrev_table_holder
.get ();
7222 /* Read the top level CU/TU die. */
7223 init_cu_die_reader (this, cu
, section
, NULL
, abbrev_table
);
7224 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7226 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
7232 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7233 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7234 table from the DWO file and pass the ownership over to us. It will be
7235 referenced from READER, so we must make sure to free it after we're done
7238 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7239 DWO CU, that this test will fail (the attribute will not be present). */
7240 const char *dwo_name
= dwarf2_dwo_name (comp_unit_die
, cu
);
7241 if (dwo_name
!= nullptr)
7243 struct dwo_unit
*dwo_unit
;
7244 struct die_info
*dwo_comp_unit_die
;
7246 if (comp_unit_die
->has_children
)
7248 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
7249 " has children (offset %s) [in module %s]"),
7250 sect_offset_str (this_cu
->sect_off
),
7251 bfd_get_filename (abfd
));
7253 dwo_unit
= lookup_dwo_unit (cu
, comp_unit_die
, dwo_name
);
7254 if (dwo_unit
!= NULL
)
7256 if (read_cutu_die_from_dwo (cu
, dwo_unit
,
7257 comp_unit_die
, NULL
,
7260 &m_dwo_abbrev_table
) == 0)
7266 comp_unit_die
= dwo_comp_unit_die
;
7270 /* Yikes, we couldn't find the rest of the DIE, we only have
7271 the stub. A complaint has already been logged. There's
7272 not much more we can do except pass on the stub DIE to
7273 die_reader_func. We don't want to throw an error on bad
7280 cutu_reader::keep ()
7282 /* Done, clean up. */
7283 gdb_assert (!dummy_p
);
7284 if (m_new_cu
!= NULL
)
7286 /* Save this dwarf2_cu in the per_objfile. The per_objfile owns it
7288 dwarf2_per_objfile
*per_objfile
= m_new_cu
->per_objfile
;
7289 per_objfile
->set_cu (m_this_cu
, m_new_cu
.release ());
7293 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name (DW_AT_dwo_name)
7294 if present. DWO_FILE, if non-NULL, is the DWO file to read (the caller is
7295 assumed to have already done the lookup to find the DWO file).
7297 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7298 THIS_CU->is_debug_types, but nothing else.
7300 We fill in THIS_CU->length.
7302 THIS_CU->cu is always freed when done.
7303 This is done in order to not leave THIS_CU->cu in a state where we have
7304 to care whether it refers to the "main" CU or the DWO CU.
7306 When parent_cu is passed, it is used to provide a default value for
7307 str_offsets_base and addr_base from the parent. */
7309 cutu_reader::cutu_reader (dwarf2_per_cu_data
*this_cu
,
7310 dwarf2_per_objfile
*per_objfile
,
7311 struct dwarf2_cu
*parent_cu
,
7312 struct dwo_file
*dwo_file
)
7313 : die_reader_specs
{},
7316 struct objfile
*objfile
= per_objfile
->objfile
;
7317 struct dwarf2_section_info
*section
= this_cu
->section
;
7318 bfd
*abfd
= section
->get_bfd_owner ();
7319 struct dwarf2_section_info
*abbrev_section
;
7320 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7322 if (dwarf_die_debug
)
7323 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7324 this_cu
->is_debug_types
? "type" : "comp",
7325 sect_offset_str (this_cu
->sect_off
));
7327 gdb_assert (per_objfile
->get_cu (this_cu
) == nullptr);
7329 abbrev_section
= (dwo_file
!= NULL
7330 ? &dwo_file
->sections
.abbrev
7331 : get_abbrev_section_for_cu (this_cu
));
7333 /* This is cheap if the section is already read in. */
7334 section
->read (objfile
);
7336 m_new_cu
.reset (new dwarf2_cu (this_cu
, per_objfile
));
7338 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7339 info_ptr
= read_and_check_comp_unit_head (per_objfile
, &m_new_cu
->header
,
7340 section
, abbrev_section
, info_ptr
,
7341 (this_cu
->is_debug_types
7343 : rcuh_kind::COMPILE
));
7345 if (parent_cu
!= nullptr)
7347 m_new_cu
->str_offsets_base
= parent_cu
->str_offsets_base
;
7348 m_new_cu
->addr_base
= parent_cu
->addr_base
;
7350 this_cu
->length
= m_new_cu
->header
.get_length ();
7352 /* Skip dummy compilation units. */
7353 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7354 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7360 m_abbrev_table_holder
7361 = abbrev_table::read (objfile
, abbrev_section
,
7362 m_new_cu
->header
.abbrev_sect_off
);
7364 init_cu_die_reader (this, m_new_cu
.get (), section
, dwo_file
,
7365 m_abbrev_table_holder
.get ());
7366 info_ptr
= read_full_die (this, &comp_unit_die
, info_ptr
);
7370 /* Type Unit Groups.
7372 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7373 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7374 so that all types coming from the same compilation (.o file) are grouped
7375 together. A future step could be to put the types in the same symtab as
7376 the CU the types ultimately came from. */
7379 hash_type_unit_group (const void *item
)
7381 const struct type_unit_group
*tu_group
7382 = (const struct type_unit_group
*) item
;
7384 return hash_stmt_list_entry (&tu_group
->hash
);
7388 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7390 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7391 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7393 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7396 /* Allocate a hash table for type unit groups. */
7399 allocate_type_unit_groups_table ()
7401 return htab_up (htab_create_alloc (3,
7402 hash_type_unit_group
,
7404 NULL
, xcalloc
, xfree
));
7407 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7408 partial symtabs. We combine several TUs per psymtab to not let the size
7409 of any one psymtab grow too big. */
7410 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7411 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7413 /* Helper routine for get_type_unit_group.
7414 Create the type_unit_group object used to hold one or more TUs. */
7416 static struct type_unit_group
*
7417 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7419 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
7420 dwarf2_per_bfd
*per_bfd
= per_objfile
->per_bfd
;
7421 struct dwarf2_per_cu_data
*per_cu
;
7422 struct type_unit_group
*tu_group
;
7424 tu_group
= OBSTACK_ZALLOC (&per_objfile
->per_bfd
->obstack
, type_unit_group
);
7425 per_cu
= &tu_group
->per_cu
;
7426 per_cu
->per_bfd
= per_bfd
;
7428 if (per_bfd
->using_index
)
7430 per_cu
->v
.quick
= OBSTACK_ZALLOC (&per_bfd
->obstack
,
7431 struct dwarf2_per_cu_quick_data
);
7435 unsigned int line_offset
= to_underlying (line_offset_struct
);
7436 dwarf2_psymtab
*pst
;
7439 /* Give the symtab a useful name for debug purposes. */
7440 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7441 name
= string_printf ("<type_units_%d>",
7442 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7444 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7446 pst
= create_partial_symtab (per_cu
, per_objfile
, name
.c_str ());
7447 pst
->anonymous
= true;
7450 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7451 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7456 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7457 STMT_LIST is a DW_AT_stmt_list attribute. */
7459 static struct type_unit_group
*
7460 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7462 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
7463 struct tu_stats
*tu_stats
= &per_objfile
->per_bfd
->tu_stats
;
7464 struct type_unit_group
*tu_group
;
7466 unsigned int line_offset
;
7467 struct type_unit_group type_unit_group_for_lookup
;
7469 if (per_objfile
->per_bfd
->type_unit_groups
== NULL
)
7470 per_objfile
->per_bfd
->type_unit_groups
= allocate_type_unit_groups_table ();
7472 /* Do we need to create a new group, or can we use an existing one? */
7476 line_offset
= DW_UNSND (stmt_list
);
7477 ++tu_stats
->nr_symtab_sharers
;
7481 /* Ugh, no stmt_list. Rare, but we have to handle it.
7482 We can do various things here like create one group per TU or
7483 spread them over multiple groups to split up the expansion work.
7484 To avoid worst case scenarios (too many groups or too large groups)
7485 we, umm, group them in bunches. */
7486 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7487 | (tu_stats
->nr_stmt_less_type_units
7488 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7489 ++tu_stats
->nr_stmt_less_type_units
;
7492 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7493 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7494 slot
= htab_find_slot (per_objfile
->per_bfd
->type_unit_groups
.get (),
7495 &type_unit_group_for_lookup
, INSERT
);
7498 tu_group
= (struct type_unit_group
*) *slot
;
7499 gdb_assert (tu_group
!= NULL
);
7503 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7504 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7506 ++tu_stats
->nr_symtabs
;
7512 /* Partial symbol tables. */
7514 /* Create a psymtab named NAME and assign it to PER_CU.
7516 The caller must fill in the following details:
7517 dirname, textlow, texthigh. */
7519 static dwarf2_psymtab
*
7520 create_partial_symtab (dwarf2_per_cu_data
*per_cu
,
7521 dwarf2_per_objfile
*per_objfile
,
7524 struct objfile
*objfile
= per_objfile
->objfile
;
7525 dwarf2_psymtab
*pst
;
7527 pst
= new dwarf2_psymtab (name
, objfile
, per_cu
);
7529 pst
->psymtabs_addrmap_supported
= true;
7531 /* This is the glue that links PST into GDB's symbol API. */
7532 per_cu
->v
.psymtab
= pst
;
7537 /* DIE reader function for process_psymtab_comp_unit. */
7540 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7541 const gdb_byte
*info_ptr
,
7542 struct die_info
*comp_unit_die
,
7543 enum language pretend_language
)
7545 struct dwarf2_cu
*cu
= reader
->cu
;
7546 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
7547 struct objfile
*objfile
= per_objfile
->objfile
;
7548 struct gdbarch
*gdbarch
= objfile
->arch ();
7549 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7551 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7552 dwarf2_psymtab
*pst
;
7553 enum pc_bounds_kind cu_bounds_kind
;
7554 const char *filename
;
7556 gdb_assert (! per_cu
->is_debug_types
);
7558 prepare_one_comp_unit (cu
, comp_unit_die
, pretend_language
);
7560 /* Allocate a new partial symbol table structure. */
7561 gdb::unique_xmalloc_ptr
<char> debug_filename
;
7562 static const char artificial
[] = "<artificial>";
7563 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7564 if (filename
== NULL
)
7566 else if (strcmp (filename
, artificial
) == 0)
7568 debug_filename
.reset (concat (artificial
, "@",
7569 sect_offset_str (per_cu
->sect_off
),
7571 filename
= debug_filename
.get ();
7574 pst
= create_partial_symtab (per_cu
, per_objfile
, filename
);
7576 /* This must be done before calling dwarf2_build_include_psymtabs. */
7577 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7579 baseaddr
= objfile
->text_section_offset ();
7581 dwarf2_find_base_address (comp_unit_die
, cu
);
7583 /* Possibly set the default values of LOWPC and HIGHPC from
7585 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7586 &best_highpc
, cu
, pst
);
7587 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7590 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
7593 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
7595 /* Store the contiguous range if it is not empty; it can be
7596 empty for CUs with no code. */
7597 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
7601 /* Check if comp unit has_children.
7602 If so, read the rest of the partial symbols from this comp unit.
7603 If not, there's no more debug_info for this comp unit. */
7604 if (comp_unit_die
->has_children
)
7606 struct partial_die_info
*first_die
;
7607 CORE_ADDR lowpc
, highpc
;
7609 lowpc
= ((CORE_ADDR
) -1);
7610 highpc
= ((CORE_ADDR
) 0);
7612 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7614 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7615 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7617 /* If we didn't find a lowpc, set it to highpc to avoid
7618 complaints from `maint check'. */
7619 if (lowpc
== ((CORE_ADDR
) -1))
7622 /* If the compilation unit didn't have an explicit address range,
7623 then use the information extracted from its child dies. */
7624 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7627 best_highpc
= highpc
;
7630 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
7631 best_lowpc
+ baseaddr
)
7633 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
7634 best_highpc
+ baseaddr
)
7637 end_psymtab_common (objfile
, pst
);
7639 if (!cu
->per_cu
->imported_symtabs_empty ())
7642 int len
= cu
->per_cu
->imported_symtabs_size ();
7644 /* Fill in 'dependencies' here; we fill in 'users' in a
7646 pst
->number_of_dependencies
= len
;
7648 = objfile
->partial_symtabs
->allocate_dependencies (len
);
7649 for (i
= 0; i
< len
; ++i
)
7651 pst
->dependencies
[i
]
7652 = cu
->per_cu
->imported_symtabs
->at (i
)->v
.psymtab
;
7655 cu
->per_cu
->imported_symtabs_free ();
7658 /* Get the list of files included in the current compilation unit,
7659 and build a psymtab for each of them. */
7660 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
7662 if (dwarf_read_debug
)
7663 fprintf_unfiltered (gdb_stdlog
,
7664 "Psymtab for %s unit @%s: %s - %s"
7665 ", %d global, %d static syms\n",
7666 per_cu
->is_debug_types
? "type" : "comp",
7667 sect_offset_str (per_cu
->sect_off
),
7668 paddress (gdbarch
, pst
->text_low (objfile
)),
7669 paddress (gdbarch
, pst
->text_high (objfile
)),
7670 pst
->n_global_syms
, pst
->n_static_syms
);
7673 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7674 Process compilation unit THIS_CU for a psymtab. */
7677 process_psymtab_comp_unit (dwarf2_per_cu_data
*this_cu
,
7678 dwarf2_per_objfile
*per_objfile
,
7679 bool want_partial_unit
,
7680 enum language pretend_language
)
7682 /* If this compilation unit was already read in, free the
7683 cached copy in order to read it in again. This is
7684 necessary because we skipped some symbols when we first
7685 read in the compilation unit (see load_partial_dies).
7686 This problem could be avoided, but the benefit is unclear. */
7687 per_objfile
->remove_cu (this_cu
);
7689 cutu_reader
reader (this_cu
, per_objfile
, nullptr, nullptr, false);
7691 switch (reader
.comp_unit_die
->tag
)
7693 case DW_TAG_compile_unit
:
7694 this_cu
->unit_type
= DW_UT_compile
;
7696 case DW_TAG_partial_unit
:
7697 this_cu
->unit_type
= DW_UT_partial
;
7707 else if (this_cu
->is_debug_types
)
7708 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7709 reader
.comp_unit_die
);
7710 else if (want_partial_unit
7711 || reader
.comp_unit_die
->tag
!= DW_TAG_partial_unit
)
7712 process_psymtab_comp_unit_reader (&reader
, reader
.info_ptr
,
7713 reader
.comp_unit_die
,
7716 this_cu
->lang
= reader
.cu
->language
;
7718 /* Age out any secondary CUs. */
7719 per_objfile
->age_comp_units ();
7722 /* Reader function for build_type_psymtabs. */
7725 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
7726 const gdb_byte
*info_ptr
,
7727 struct die_info
*type_unit_die
)
7729 dwarf2_per_objfile
*per_objfile
= reader
->cu
->per_objfile
;
7730 struct objfile
*objfile
= per_objfile
->objfile
;
7731 struct dwarf2_cu
*cu
= reader
->cu
;
7732 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7733 struct signatured_type
*sig_type
;
7734 struct type_unit_group
*tu_group
;
7735 struct attribute
*attr
;
7736 struct partial_die_info
*first_die
;
7737 CORE_ADDR lowpc
, highpc
;
7738 dwarf2_psymtab
*pst
;
7740 gdb_assert (per_cu
->is_debug_types
);
7741 sig_type
= (struct signatured_type
*) per_cu
;
7743 if (! type_unit_die
->has_children
)
7746 attr
= type_unit_die
->attr (DW_AT_stmt_list
);
7747 tu_group
= get_type_unit_group (cu
, attr
);
7749 if (tu_group
->tus
== nullptr)
7750 tu_group
->tus
= new std::vector
<signatured_type
*>;
7751 tu_group
->tus
->push_back (sig_type
);
7753 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
7754 pst
= create_partial_symtab (per_cu
, per_objfile
, "");
7755 pst
->anonymous
= true;
7757 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7759 lowpc
= (CORE_ADDR
) -1;
7760 highpc
= (CORE_ADDR
) 0;
7761 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
7763 end_psymtab_common (objfile
, pst
);
7766 /* Struct used to sort TUs by their abbreviation table offset. */
7768 struct tu_abbrev_offset
7770 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
7771 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
7774 signatured_type
*sig_type
;
7775 sect_offset abbrev_offset
;
7778 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
7781 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
7782 const struct tu_abbrev_offset
&b
)
7784 return a
.abbrev_offset
< b
.abbrev_offset
;
7787 /* Efficiently read all the type units.
7788 This does the bulk of the work for build_type_psymtabs.
7790 The efficiency is because we sort TUs by the abbrev table they use and
7791 only read each abbrev table once. In one program there are 200K TUs
7792 sharing 8K abbrev tables.
7794 The main purpose of this function is to support building the
7795 dwarf2_per_objfile->per_bfd->type_unit_groups table.
7796 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
7797 can collapse the search space by grouping them by stmt_list.
7798 The savings can be significant, in the same program from above the 200K TUs
7799 share 8K stmt_list tables.
7801 FUNC is expected to call get_type_unit_group, which will create the
7802 struct type_unit_group if necessary and add it to
7803 dwarf2_per_objfile->per_bfd->type_unit_groups. */
7806 build_type_psymtabs_1 (dwarf2_per_objfile
*per_objfile
)
7808 struct tu_stats
*tu_stats
= &per_objfile
->per_bfd
->tu_stats
;
7809 abbrev_table_up abbrev_table
;
7810 sect_offset abbrev_offset
;
7812 /* It's up to the caller to not call us multiple times. */
7813 gdb_assert (per_objfile
->per_bfd
->type_unit_groups
== NULL
);
7815 if (per_objfile
->per_bfd
->all_type_units
.empty ())
7818 /* TUs typically share abbrev tables, and there can be way more TUs than
7819 abbrev tables. Sort by abbrev table to reduce the number of times we
7820 read each abbrev table in.
7821 Alternatives are to punt or to maintain a cache of abbrev tables.
7822 This is simpler and efficient enough for now.
7824 Later we group TUs by their DW_AT_stmt_list value (as this defines the
7825 symtab to use). Typically TUs with the same abbrev offset have the same
7826 stmt_list value too so in practice this should work well.
7828 The basic algorithm here is:
7830 sort TUs by abbrev table
7831 for each TU with same abbrev table:
7832 read abbrev table if first user
7833 read TU top level DIE
7834 [IWBN if DWO skeletons had DW_AT_stmt_list]
7837 if (dwarf_read_debug
)
7838 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
7840 /* Sort in a separate table to maintain the order of all_type_units
7841 for .gdb_index: TU indices directly index all_type_units. */
7842 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
7843 sorted_by_abbrev
.reserve (per_objfile
->per_bfd
->all_type_units
.size ());
7845 for (signatured_type
*sig_type
: per_objfile
->per_bfd
->all_type_units
)
7846 sorted_by_abbrev
.emplace_back
7847 (sig_type
, read_abbrev_offset (per_objfile
, sig_type
->per_cu
.section
,
7848 sig_type
->per_cu
.sect_off
));
7850 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
7851 sort_tu_by_abbrev_offset
);
7853 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
7855 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
7857 /* Switch to the next abbrev table if necessary. */
7858 if (abbrev_table
== NULL
7859 || tu
.abbrev_offset
!= abbrev_offset
)
7861 abbrev_offset
= tu
.abbrev_offset
;
7863 abbrev_table::read (per_objfile
->objfile
,
7864 &per_objfile
->per_bfd
->abbrev
, abbrev_offset
);
7865 ++tu_stats
->nr_uniq_abbrev_tables
;
7868 cutu_reader
reader (&tu
.sig_type
->per_cu
, per_objfile
,
7869 abbrev_table
.get (), nullptr, false);
7870 if (!reader
.dummy_p
)
7871 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7872 reader
.comp_unit_die
);
7876 /* Print collected type unit statistics. */
7879 print_tu_stats (dwarf2_per_objfile
*per_objfile
)
7881 struct tu_stats
*tu_stats
= &per_objfile
->per_bfd
->tu_stats
;
7883 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
7884 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
7885 per_objfile
->per_bfd
->all_type_units
.size ());
7886 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
7887 tu_stats
->nr_uniq_abbrev_tables
);
7888 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
7889 tu_stats
->nr_symtabs
);
7890 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
7891 tu_stats
->nr_symtab_sharers
);
7892 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
7893 tu_stats
->nr_stmt_less_type_units
);
7894 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
7895 tu_stats
->nr_all_type_units_reallocs
);
7898 /* Traversal function for build_type_psymtabs. */
7901 build_type_psymtab_dependencies (void **slot
, void *info
)
7903 dwarf2_per_objfile
*per_objfile
= (dwarf2_per_objfile
*) info
;
7904 struct objfile
*objfile
= per_objfile
->objfile
;
7905 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
7906 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
7907 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
7908 int len
= (tu_group
->tus
== nullptr) ? 0 : tu_group
->tus
->size ();
7911 gdb_assert (len
> 0);
7912 gdb_assert (per_cu
->type_unit_group_p ());
7914 pst
->number_of_dependencies
= len
;
7915 pst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (len
);
7916 for (i
= 0; i
< len
; ++i
)
7918 struct signatured_type
*iter
= tu_group
->tus
->at (i
);
7919 gdb_assert (iter
->per_cu
.is_debug_types
);
7920 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
7921 iter
->type_unit_group
= tu_group
;
7924 delete tu_group
->tus
;
7925 tu_group
->tus
= nullptr;
7930 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
7931 Build partial symbol tables for the .debug_types comp-units. */
7934 build_type_psymtabs (dwarf2_per_objfile
*per_objfile
)
7936 if (! create_all_type_units (per_objfile
))
7939 build_type_psymtabs_1 (per_objfile
);
7942 /* Traversal function for process_skeletonless_type_unit.
7943 Read a TU in a DWO file and build partial symbols for it. */
7946 process_skeletonless_type_unit (void **slot
, void *info
)
7948 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
7949 dwarf2_per_objfile
*per_objfile
= (dwarf2_per_objfile
*) info
;
7950 struct signatured_type find_entry
, *entry
;
7952 /* If this TU doesn't exist in the global table, add it and read it in. */
7954 if (per_objfile
->per_bfd
->signatured_types
== NULL
)
7955 per_objfile
->per_bfd
->signatured_types
= allocate_signatured_type_table ();
7957 find_entry
.signature
= dwo_unit
->signature
;
7958 slot
= htab_find_slot (per_objfile
->per_bfd
->signatured_types
.get (),
7959 &find_entry
, INSERT
);
7960 /* If we've already seen this type there's nothing to do. What's happening
7961 is we're doing our own version of comdat-folding here. */
7965 /* This does the job that create_all_type_units would have done for
7967 entry
= add_type_unit (per_objfile
, dwo_unit
->signature
, slot
);
7968 fill_in_sig_entry_from_dwo_entry (per_objfile
, entry
, dwo_unit
);
7971 /* This does the job that build_type_psymtabs_1 would have done. */
7972 cutu_reader
reader (&entry
->per_cu
, per_objfile
, nullptr, nullptr, false);
7973 if (!reader
.dummy_p
)
7974 build_type_psymtabs_reader (&reader
, reader
.info_ptr
,
7975 reader
.comp_unit_die
);
7980 /* Traversal function for process_skeletonless_type_units. */
7983 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
7985 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
7987 if (dwo_file
->tus
!= NULL
)
7988 htab_traverse_noresize (dwo_file
->tus
.get (),
7989 process_skeletonless_type_unit
, info
);
7994 /* Scan all TUs of DWO files, verifying we've processed them.
7995 This is needed in case a TU was emitted without its skeleton.
7996 Note: This can't be done until we know what all the DWO files are. */
7999 process_skeletonless_type_units (dwarf2_per_objfile
*per_objfile
)
8001 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
8002 if (get_dwp_file (per_objfile
) == NULL
8003 && per_objfile
->per_bfd
->dwo_files
!= NULL
)
8005 htab_traverse_noresize (per_objfile
->per_bfd
->dwo_files
.get (),
8006 process_dwo_file_for_skeletonless_type_units
,
8011 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
8014 set_partial_user (dwarf2_per_objfile
*per_objfile
)
8016 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
8018 dwarf2_psymtab
*pst
= per_cu
->v
.psymtab
;
8023 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
8025 /* Set the 'user' field only if it is not already set. */
8026 if (pst
->dependencies
[j
]->user
== NULL
)
8027 pst
->dependencies
[j
]->user
= pst
;
8032 /* Build the partial symbol table by doing a quick pass through the
8033 .debug_info and .debug_abbrev sections. */
8036 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
*per_objfile
)
8038 struct objfile
*objfile
= per_objfile
->objfile
;
8040 if (dwarf_read_debug
)
8042 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
8043 objfile_name (objfile
));
8046 scoped_restore restore_reading_psyms
8047 = make_scoped_restore (&per_objfile
->per_bfd
->reading_partial_symbols
,
8050 per_objfile
->per_bfd
->info
.read (objfile
);
8052 /* Any cached compilation units will be linked by the per-objfile
8053 read_in_chain. Make sure to free them when we're done. */
8054 free_cached_comp_units
freer (per_objfile
);
8056 build_type_psymtabs (per_objfile
);
8058 create_all_comp_units (per_objfile
);
8060 /* Create a temporary address map on a temporary obstack. We later
8061 copy this to the final obstack. */
8062 auto_obstack temp_obstack
;
8064 scoped_restore save_psymtabs_addrmap
8065 = make_scoped_restore (&objfile
->partial_symtabs
->psymtabs_addrmap
,
8066 addrmap_create_mutable (&temp_obstack
));
8068 for (dwarf2_per_cu_data
*per_cu
: per_objfile
->per_bfd
->all_comp_units
)
8070 if (per_cu
->v
.psymtab
!= NULL
)
8071 /* In case a forward DW_TAG_imported_unit has read the CU already. */
8073 process_psymtab_comp_unit (per_cu
, per_objfile
, false,
8077 /* This has to wait until we read the CUs, we need the list of DWOs. */
8078 process_skeletonless_type_units (per_objfile
);
8080 /* Now that all TUs have been processed we can fill in the dependencies. */
8081 if (per_objfile
->per_bfd
->type_unit_groups
!= NULL
)
8083 htab_traverse_noresize (per_objfile
->per_bfd
->type_unit_groups
.get (),
8084 build_type_psymtab_dependencies
, per_objfile
);
8087 if (dwarf_read_debug
)
8088 print_tu_stats (per_objfile
);
8090 set_partial_user (per_objfile
);
8092 objfile
->partial_symtabs
->psymtabs_addrmap
8093 = addrmap_create_fixed (objfile
->partial_symtabs
->psymtabs_addrmap
,
8094 objfile
->partial_symtabs
->obstack ());
8095 /* At this point we want to keep the address map. */
8096 save_psymtabs_addrmap
.release ();
8098 if (dwarf_read_debug
)
8099 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
8100 objfile_name (objfile
));
8103 /* Load the partial DIEs for a secondary CU into memory.
8104 This is also used when rereading a primary CU with load_all_dies. */
8107 load_partial_comp_unit (dwarf2_per_cu_data
*this_cu
,
8108 dwarf2_per_objfile
*per_objfile
,
8109 dwarf2_cu
*existing_cu
)
8111 cutu_reader
reader (this_cu
, per_objfile
, nullptr, existing_cu
, false);
8113 if (!reader
.dummy_p
)
8115 prepare_one_comp_unit (reader
.cu
, reader
.comp_unit_die
,
8118 /* Check if comp unit has_children.
8119 If so, read the rest of the partial symbols from this comp unit.
8120 If not, there's no more debug_info for this comp unit. */
8121 if (reader
.comp_unit_die
->has_children
)
8122 load_partial_dies (&reader
, reader
.info_ptr
, 0);
8129 read_comp_units_from_section (dwarf2_per_objfile
*per_objfile
,
8130 struct dwarf2_section_info
*section
,
8131 struct dwarf2_section_info
*abbrev_section
,
8132 unsigned int is_dwz
)
8134 const gdb_byte
*info_ptr
;
8135 struct objfile
*objfile
= per_objfile
->objfile
;
8137 if (dwarf_read_debug
)
8138 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
8139 section
->get_name (),
8140 section
->get_file_name ());
8142 section
->read (objfile
);
8144 info_ptr
= section
->buffer
;
8146 while (info_ptr
< section
->buffer
+ section
->size
)
8148 struct dwarf2_per_cu_data
*this_cu
;
8150 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
8152 comp_unit_head cu_header
;
8153 read_and_check_comp_unit_head (per_objfile
, &cu_header
, section
,
8154 abbrev_section
, info_ptr
,
8155 rcuh_kind::COMPILE
);
8157 /* Save the compilation unit for later lookup. */
8158 if (cu_header
.unit_type
!= DW_UT_type
)
8159 this_cu
= per_objfile
->per_bfd
->allocate_per_cu ();
8162 auto sig_type
= per_objfile
->per_bfd
->allocate_signatured_type ();
8163 sig_type
->signature
= cu_header
.signature
;
8164 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
8165 this_cu
= &sig_type
->per_cu
;
8167 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
8168 this_cu
->sect_off
= sect_off
;
8169 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
8170 this_cu
->is_dwz
= is_dwz
;
8171 this_cu
->section
= section
;
8173 per_objfile
->per_bfd
->all_comp_units
.push_back (this_cu
);
8175 info_ptr
= info_ptr
+ this_cu
->length
;
8179 /* Create a list of all compilation units in OBJFILE.
8180 This is only done for -readnow and building partial symtabs. */
8183 create_all_comp_units (dwarf2_per_objfile
*per_objfile
)
8185 gdb_assert (per_objfile
->per_bfd
->all_comp_units
.empty ());
8186 read_comp_units_from_section (per_objfile
, &per_objfile
->per_bfd
->info
,
8187 &per_objfile
->per_bfd
->abbrev
, 0);
8189 dwz_file
*dwz
= dwarf2_get_dwz_file (per_objfile
->per_bfd
);
8191 read_comp_units_from_section (per_objfile
, &dwz
->info
, &dwz
->abbrev
, 1);
8194 /* Process all loaded DIEs for compilation unit CU, starting at
8195 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8196 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8197 DW_AT_ranges). See the comments of add_partial_subprogram on how
8198 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8201 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8202 CORE_ADDR
*highpc
, int set_addrmap
,
8203 struct dwarf2_cu
*cu
)
8205 struct partial_die_info
*pdi
;
8207 /* Now, march along the PDI's, descending into ones which have
8208 interesting children but skipping the children of the other ones,
8209 until we reach the end of the compilation unit. */
8217 /* Anonymous namespaces or modules have no name but have interesting
8218 children, so we need to look at them. Ditto for anonymous
8221 if (pdi
->raw_name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8222 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8223 || pdi
->tag
== DW_TAG_imported_unit
8224 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8228 case DW_TAG_subprogram
:
8229 case DW_TAG_inlined_subroutine
:
8230 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8231 if (cu
->language
== language_cplus
)
8232 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8235 case DW_TAG_constant
:
8236 case DW_TAG_variable
:
8237 case DW_TAG_typedef
:
8238 case DW_TAG_union_type
:
8239 if (!pdi
->is_declaration
8240 || (pdi
->tag
== DW_TAG_variable
&& pdi
->is_external
))
8242 add_partial_symbol (pdi
, cu
);
8245 case DW_TAG_class_type
:
8246 case DW_TAG_interface_type
:
8247 case DW_TAG_structure_type
:
8248 if (!pdi
->is_declaration
)
8250 add_partial_symbol (pdi
, cu
);
8252 if ((cu
->language
== language_rust
8253 || cu
->language
== language_cplus
) && pdi
->has_children
)
8254 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8257 case DW_TAG_enumeration_type
:
8258 if (!pdi
->is_declaration
)
8259 add_partial_enumeration (pdi
, cu
);
8261 case DW_TAG_base_type
:
8262 case DW_TAG_subrange_type
:
8263 /* File scope base type definitions are added to the partial
8265 add_partial_symbol (pdi
, cu
);
8267 case DW_TAG_namespace
:
8268 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8271 if (!pdi
->is_declaration
)
8272 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8274 case DW_TAG_imported_unit
:
8276 struct dwarf2_per_cu_data
*per_cu
;
8278 /* For now we don't handle imported units in type units. */
8279 if (cu
->per_cu
->is_debug_types
)
8281 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8282 " supported in type units [in module %s]"),
8283 objfile_name (cu
->per_objfile
->objfile
));
8286 per_cu
= dwarf2_find_containing_comp_unit
8287 (pdi
->d
.sect_off
, pdi
->is_dwz
, cu
->per_objfile
);
8289 /* Go read the partial unit, if needed. */
8290 if (per_cu
->v
.psymtab
== NULL
)
8291 process_psymtab_comp_unit (per_cu
, cu
->per_objfile
, true,
8294 cu
->per_cu
->imported_symtabs_push (per_cu
);
8297 case DW_TAG_imported_declaration
:
8298 add_partial_symbol (pdi
, cu
);
8305 /* If the die has a sibling, skip to the sibling. */
8307 pdi
= pdi
->die_sibling
;
8311 /* Functions used to compute the fully scoped name of a partial DIE.
8313 Normally, this is simple. For C++, the parent DIE's fully scoped
8314 name is concatenated with "::" and the partial DIE's name.
8315 Enumerators are an exception; they use the scope of their parent
8316 enumeration type, i.e. the name of the enumeration type is not
8317 prepended to the enumerator.
8319 There are two complexities. One is DW_AT_specification; in this
8320 case "parent" means the parent of the target of the specification,
8321 instead of the direct parent of the DIE. The other is compilers
8322 which do not emit DW_TAG_namespace; in this case we try to guess
8323 the fully qualified name of structure types from their members'
8324 linkage names. This must be done using the DIE's children rather
8325 than the children of any DW_AT_specification target. We only need
8326 to do this for structures at the top level, i.e. if the target of
8327 any DW_AT_specification (if any; otherwise the DIE itself) does not
8330 /* Compute the scope prefix associated with PDI's parent, in
8331 compilation unit CU. The result will be allocated on CU's
8332 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8333 field. NULL is returned if no prefix is necessary. */
8335 partial_die_parent_scope (struct partial_die_info
*pdi
,
8336 struct dwarf2_cu
*cu
)
8338 const char *grandparent_scope
;
8339 struct partial_die_info
*parent
, *real_pdi
;
8341 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8342 then this means the parent of the specification DIE. */
8345 while (real_pdi
->has_specification
)
8347 auto res
= find_partial_die (real_pdi
->spec_offset
,
8348 real_pdi
->spec_is_dwz
, cu
);
8353 parent
= real_pdi
->die_parent
;
8357 if (parent
->scope_set
)
8358 return parent
->scope
;
8362 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8364 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8365 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8366 Work around this problem here. */
8367 if (cu
->language
== language_cplus
8368 && parent
->tag
== DW_TAG_namespace
8369 && strcmp (parent
->name (cu
), "::") == 0
8370 && grandparent_scope
== NULL
)
8372 parent
->scope
= NULL
;
8373 parent
->scope_set
= 1;
8377 /* Nested subroutines in Fortran get a prefix. */
8378 if (pdi
->tag
== DW_TAG_enumerator
)
8379 /* Enumerators should not get the name of the enumeration as a prefix. */
8380 parent
->scope
= grandparent_scope
;
8381 else if (parent
->tag
== DW_TAG_namespace
8382 || parent
->tag
== DW_TAG_module
8383 || parent
->tag
== DW_TAG_structure_type
8384 || parent
->tag
== DW_TAG_class_type
8385 || parent
->tag
== DW_TAG_interface_type
8386 || parent
->tag
== DW_TAG_union_type
8387 || parent
->tag
== DW_TAG_enumeration_type
8388 || (cu
->language
== language_fortran
8389 && parent
->tag
== DW_TAG_subprogram
8390 && pdi
->tag
== DW_TAG_subprogram
))
8392 if (grandparent_scope
== NULL
)
8393 parent
->scope
= parent
->name (cu
);
8395 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8397 parent
->name (cu
), 0, cu
);
8401 /* FIXME drow/2004-04-01: What should we be doing with
8402 function-local names? For partial symbols, we should probably be
8404 complaint (_("unhandled containing DIE tag %s for DIE at %s"),
8405 dwarf_tag_name (parent
->tag
),
8406 sect_offset_str (pdi
->sect_off
));
8407 parent
->scope
= grandparent_scope
;
8410 parent
->scope_set
= 1;
8411 return parent
->scope
;
8414 /* Return the fully scoped name associated with PDI, from compilation unit
8415 CU. The result will be allocated with malloc. */
8417 static gdb::unique_xmalloc_ptr
<char>
8418 partial_die_full_name (struct partial_die_info
*pdi
,
8419 struct dwarf2_cu
*cu
)
8421 const char *parent_scope
;
8423 /* If this is a template instantiation, we can not work out the
8424 template arguments from partial DIEs. So, unfortunately, we have
8425 to go through the full DIEs. At least any work we do building
8426 types here will be reused if full symbols are loaded later. */
8427 if (pdi
->has_template_arguments
)
8431 if (pdi
->name (cu
) != NULL
&& strchr (pdi
->name (cu
), '<') == NULL
)
8433 struct die_info
*die
;
8434 struct attribute attr
;
8435 struct dwarf2_cu
*ref_cu
= cu
;
8437 /* DW_FORM_ref_addr is using section offset. */
8438 attr
.name
= (enum dwarf_attribute
) 0;
8439 attr
.form
= DW_FORM_ref_addr
;
8440 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8441 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8443 return make_unique_xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8447 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8448 if (parent_scope
== NULL
)
8451 return gdb::unique_xmalloc_ptr
<char> (typename_concat (NULL
, parent_scope
,
8457 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8459 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
8460 struct objfile
*objfile
= per_objfile
->objfile
;
8461 struct gdbarch
*gdbarch
= objfile
->arch ();
8463 const char *actual_name
= NULL
;
8466 baseaddr
= objfile
->text_section_offset ();
8468 gdb::unique_xmalloc_ptr
<char> built_actual_name
8469 = partial_die_full_name (pdi
, cu
);
8470 if (built_actual_name
!= NULL
)
8471 actual_name
= built_actual_name
.get ();
8473 if (actual_name
== NULL
)
8474 actual_name
= pdi
->name (cu
);
8476 partial_symbol psymbol
;
8477 memset (&psymbol
, 0, sizeof (psymbol
));
8478 psymbol
.ginfo
.set_language (cu
->language
, &objfile
->objfile_obstack
);
8479 psymbol
.ginfo
.section
= -1;
8481 /* The code below indicates that the psymbol should be installed by
8483 gdb::optional
<psymbol_placement
> where
;
8487 case DW_TAG_inlined_subroutine
:
8488 case DW_TAG_subprogram
:
8489 addr
= (gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
)
8491 if (pdi
->is_external
8492 || cu
->language
== language_ada
8493 || (cu
->language
== language_fortran
8494 && pdi
->die_parent
!= NULL
8495 && pdi
->die_parent
->tag
== DW_TAG_subprogram
))
8497 /* Normally, only "external" DIEs are part of the global scope.
8498 But in Ada and Fortran, we want to be able to access nested
8499 procedures globally. So all Ada and Fortran subprograms are
8500 stored in the global scope. */
8501 where
= psymbol_placement::GLOBAL
;
8504 where
= psymbol_placement::STATIC
;
8506 psymbol
.domain
= VAR_DOMAIN
;
8507 psymbol
.aclass
= LOC_BLOCK
;
8508 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8509 psymbol
.ginfo
.value
.address
= addr
;
8511 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8512 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8514 case DW_TAG_constant
:
8515 psymbol
.domain
= VAR_DOMAIN
;
8516 psymbol
.aclass
= LOC_STATIC
;
8517 where
= (pdi
->is_external
8518 ? psymbol_placement::GLOBAL
8519 : psymbol_placement::STATIC
);
8521 case DW_TAG_variable
:
8523 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8527 && !per_objfile
->per_bfd
->has_section_at_zero
)
8529 /* A global or static variable may also have been stripped
8530 out by the linker if unused, in which case its address
8531 will be nullified; do not add such variables into partial
8532 symbol table then. */
8534 else if (pdi
->is_external
)
8537 Don't enter into the minimal symbol tables as there is
8538 a minimal symbol table entry from the ELF symbols already.
8539 Enter into partial symbol table if it has a location
8540 descriptor or a type.
8541 If the location descriptor is missing, new_symbol will create
8542 a LOC_UNRESOLVED symbol, the address of the variable will then
8543 be determined from the minimal symbol table whenever the variable
8545 The address for the partial symbol table entry is not
8546 used by GDB, but it comes in handy for debugging partial symbol
8549 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8551 psymbol
.domain
= VAR_DOMAIN
;
8552 psymbol
.aclass
= LOC_STATIC
;
8553 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8554 psymbol
.ginfo
.value
.address
= addr
;
8555 where
= psymbol_placement::GLOBAL
;
8560 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8562 /* Static Variable. Skip symbols whose value we cannot know (those
8563 without location descriptors or constant values). */
8564 if (!has_loc
&& !pdi
->has_const_value
)
8567 psymbol
.domain
= VAR_DOMAIN
;
8568 psymbol
.aclass
= LOC_STATIC
;
8569 psymbol
.ginfo
.section
= SECT_OFF_TEXT (objfile
);
8571 psymbol
.ginfo
.value
.address
= addr
;
8572 where
= psymbol_placement::STATIC
;
8575 case DW_TAG_typedef
:
8576 case DW_TAG_base_type
:
8577 case DW_TAG_subrange_type
:
8578 psymbol
.domain
= VAR_DOMAIN
;
8579 psymbol
.aclass
= LOC_TYPEDEF
;
8580 where
= psymbol_placement::STATIC
;
8582 case DW_TAG_imported_declaration
:
8583 case DW_TAG_namespace
:
8584 psymbol
.domain
= VAR_DOMAIN
;
8585 psymbol
.aclass
= LOC_TYPEDEF
;
8586 where
= psymbol_placement::GLOBAL
;
8589 /* With Fortran 77 there might be a "BLOCK DATA" module
8590 available without any name. If so, we skip the module as it
8591 doesn't bring any value. */
8592 if (actual_name
!= nullptr)
8594 psymbol
.domain
= MODULE_DOMAIN
;
8595 psymbol
.aclass
= LOC_TYPEDEF
;
8596 where
= psymbol_placement::GLOBAL
;
8599 case DW_TAG_class_type
:
8600 case DW_TAG_interface_type
:
8601 case DW_TAG_structure_type
:
8602 case DW_TAG_union_type
:
8603 case DW_TAG_enumeration_type
:
8604 /* Skip external references. The DWARF standard says in the section
8605 about "Structure, Union, and Class Type Entries": "An incomplete
8606 structure, union or class type is represented by a structure,
8607 union or class entry that does not have a byte size attribute
8608 and that has a DW_AT_declaration attribute." */
8609 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8612 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8613 static vs. global. */
8614 psymbol
.domain
= STRUCT_DOMAIN
;
8615 psymbol
.aclass
= LOC_TYPEDEF
;
8616 where
= (cu
->language
== language_cplus
8617 ? psymbol_placement::GLOBAL
8618 : psymbol_placement::STATIC
);
8620 case DW_TAG_enumerator
:
8621 psymbol
.domain
= VAR_DOMAIN
;
8622 psymbol
.aclass
= LOC_CONST
;
8623 where
= (cu
->language
== language_cplus
8624 ? psymbol_placement::GLOBAL
8625 : psymbol_placement::STATIC
);
8631 if (where
.has_value ())
8633 if (built_actual_name
!= nullptr)
8634 actual_name
= objfile
->intern (actual_name
);
8635 if (pdi
->linkage_name
== nullptr || cu
->language
== language_ada
)
8636 psymbol
.ginfo
.set_linkage_name (actual_name
);
8639 psymbol
.ginfo
.set_demangled_name (actual_name
,
8640 &objfile
->objfile_obstack
);
8641 psymbol
.ginfo
.set_linkage_name (pdi
->linkage_name
);
8643 add_psymbol_to_list (psymbol
, *where
, objfile
);
8647 /* Read a partial die corresponding to a namespace; also, add a symbol
8648 corresponding to that namespace to the symbol table. NAMESPACE is
8649 the name of the enclosing namespace. */
8652 add_partial_namespace (struct partial_die_info
*pdi
,
8653 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8654 int set_addrmap
, struct dwarf2_cu
*cu
)
8656 /* Add a symbol for the namespace. */
8658 add_partial_symbol (pdi
, cu
);
8660 /* Now scan partial symbols in that namespace. */
8662 if (pdi
->has_children
)
8663 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8666 /* Read a partial die corresponding to a Fortran module. */
8669 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
8670 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
8672 /* Add a symbol for the namespace. */
8674 add_partial_symbol (pdi
, cu
);
8676 /* Now scan partial symbols in that module. */
8678 if (pdi
->has_children
)
8679 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8682 /* Read a partial die corresponding to a subprogram or an inlined
8683 subprogram and create a partial symbol for that subprogram.
8684 When the CU language allows it, this routine also defines a partial
8685 symbol for each nested subprogram that this subprogram contains.
8686 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
8687 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
8689 PDI may also be a lexical block, in which case we simply search
8690 recursively for subprograms defined inside that lexical block.
8691 Again, this is only performed when the CU language allows this
8692 type of definitions. */
8695 add_partial_subprogram (struct partial_die_info
*pdi
,
8696 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8697 int set_addrmap
, struct dwarf2_cu
*cu
)
8699 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
8701 if (pdi
->has_pc_info
)
8703 if (pdi
->lowpc
< *lowpc
)
8704 *lowpc
= pdi
->lowpc
;
8705 if (pdi
->highpc
> *highpc
)
8706 *highpc
= pdi
->highpc
;
8709 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
8710 struct gdbarch
*gdbarch
= objfile
->arch ();
8712 CORE_ADDR this_highpc
;
8713 CORE_ADDR this_lowpc
;
8715 baseaddr
= objfile
->text_section_offset ();
8717 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8718 pdi
->lowpc
+ baseaddr
)
8721 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
8722 pdi
->highpc
+ baseaddr
)
8724 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
8725 this_lowpc
, this_highpc
- 1,
8726 cu
->per_cu
->v
.psymtab
);
8730 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
8732 if (!pdi
->is_declaration
)
8733 /* Ignore subprogram DIEs that do not have a name, they are
8734 illegal. Do not emit a complaint at this point, we will
8735 do so when we convert this psymtab into a symtab. */
8737 add_partial_symbol (pdi
, cu
);
8741 if (! pdi
->has_children
)
8744 if (cu
->language
== language_ada
|| cu
->language
== language_fortran
)
8746 pdi
= pdi
->die_child
;
8750 if (pdi
->tag
== DW_TAG_subprogram
8751 || pdi
->tag
== DW_TAG_inlined_subroutine
8752 || pdi
->tag
== DW_TAG_lexical_block
)
8753 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8754 pdi
= pdi
->die_sibling
;
8759 /* Read a partial die corresponding to an enumeration type. */
8762 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
8763 struct dwarf2_cu
*cu
)
8765 struct partial_die_info
*pdi
;
8767 if (enum_pdi
->name (cu
) != NULL
)
8768 add_partial_symbol (enum_pdi
, cu
);
8770 pdi
= enum_pdi
->die_child
;
8773 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->raw_name
== NULL
)
8774 complaint (_("malformed enumerator DIE ignored"));
8776 add_partial_symbol (pdi
, cu
);
8777 pdi
= pdi
->die_sibling
;
8781 /* Return the initial uleb128 in the die at INFO_PTR. */
8784 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
8786 unsigned int bytes_read
;
8788 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8791 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
8792 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
8794 Return the corresponding abbrev, or NULL if the number is zero (indicating
8795 an empty DIE). In either case *BYTES_READ will be set to the length of
8796 the initial number. */
8798 static struct abbrev_info
*
8799 peek_die_abbrev (const die_reader_specs
&reader
,
8800 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
8802 dwarf2_cu
*cu
= reader
.cu
;
8803 bfd
*abfd
= cu
->per_objfile
->objfile
->obfd
;
8804 unsigned int abbrev_number
8805 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
8807 if (abbrev_number
== 0)
8810 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
8813 error (_("Dwarf Error: Could not find abbrev number %d in %s"
8814 " at offset %s [in module %s]"),
8815 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
8816 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
8822 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8823 Returns a pointer to the end of a series of DIEs, terminated by an empty
8824 DIE. Any children of the skipped DIEs will also be skipped. */
8826 static const gdb_byte
*
8827 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
8831 unsigned int bytes_read
;
8832 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
8835 return info_ptr
+ bytes_read
;
8837 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
8841 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
8842 INFO_PTR should point just after the initial uleb128 of a DIE, and the
8843 abbrev corresponding to that skipped uleb128 should be passed in
8844 ABBREV. Returns a pointer to this DIE's sibling, skipping any
8847 static const gdb_byte
*
8848 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
8849 struct abbrev_info
*abbrev
)
8851 unsigned int bytes_read
;
8852 struct attribute attr
;
8853 bfd
*abfd
= reader
->abfd
;
8854 struct dwarf2_cu
*cu
= reader
->cu
;
8855 const gdb_byte
*buffer
= reader
->buffer
;
8856 const gdb_byte
*buffer_end
= reader
->buffer_end
;
8857 unsigned int form
, i
;
8859 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
8861 /* The only abbrev we care about is DW_AT_sibling. */
8862 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
8864 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
8865 if (attr
.form
== DW_FORM_ref_addr
)
8866 complaint (_("ignoring absolute DW_AT_sibling"));
8869 sect_offset off
= attr
.get_ref_die_offset ();
8870 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
8872 if (sibling_ptr
< info_ptr
)
8873 complaint (_("DW_AT_sibling points backwards"));
8874 else if (sibling_ptr
> reader
->buffer_end
)
8875 reader
->die_section
->overflow_complaint ();
8881 /* If it isn't DW_AT_sibling, skip this attribute. */
8882 form
= abbrev
->attrs
[i
].form
;
8886 case DW_FORM_ref_addr
:
8887 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
8888 and later it is offset sized. */
8889 if (cu
->header
.version
== 2)
8890 info_ptr
+= cu
->header
.addr_size
;
8892 info_ptr
+= cu
->header
.offset_size
;
8894 case DW_FORM_GNU_ref_alt
:
8895 info_ptr
+= cu
->header
.offset_size
;
8898 info_ptr
+= cu
->header
.addr_size
;
8906 case DW_FORM_flag_present
:
8907 case DW_FORM_implicit_const
:
8924 case DW_FORM_ref_sig8
:
8927 case DW_FORM_data16
:
8930 case DW_FORM_string
:
8931 read_direct_string (abfd
, info_ptr
, &bytes_read
);
8932 info_ptr
+= bytes_read
;
8934 case DW_FORM_sec_offset
:
8936 case DW_FORM_GNU_strp_alt
:
8937 info_ptr
+= cu
->header
.offset_size
;
8939 case DW_FORM_exprloc
:
8941 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8942 info_ptr
+= bytes_read
;
8944 case DW_FORM_block1
:
8945 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
8947 case DW_FORM_block2
:
8948 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
8950 case DW_FORM_block4
:
8951 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
8957 case DW_FORM_ref_udata
:
8958 case DW_FORM_GNU_addr_index
:
8959 case DW_FORM_GNU_str_index
:
8960 case DW_FORM_rnglistx
:
8961 case DW_FORM_loclistx
:
8962 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
8964 case DW_FORM_indirect
:
8965 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
8966 info_ptr
+= bytes_read
;
8967 /* We need to continue parsing from here, so just go back to
8969 goto skip_attribute
;
8972 error (_("Dwarf Error: Cannot handle %s "
8973 "in DWARF reader [in module %s]"),
8974 dwarf_form_name (form
),
8975 bfd_get_filename (abfd
));
8979 if (abbrev
->has_children
)
8980 return skip_children (reader
, info_ptr
);
8985 /* Locate ORIG_PDI's sibling.
8986 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
8988 static const gdb_byte
*
8989 locate_pdi_sibling (const struct die_reader_specs
*reader
,
8990 struct partial_die_info
*orig_pdi
,
8991 const gdb_byte
*info_ptr
)
8993 /* Do we know the sibling already? */
8995 if (orig_pdi
->sibling
)
8996 return orig_pdi
->sibling
;
8998 /* Are there any children to deal with? */
9000 if (!orig_pdi
->has_children
)
9003 /* Skip the children the long way. */
9005 return skip_children (reader
, info_ptr
);
9008 /* Expand this partial symbol table into a full symbol table. SELF is
9012 dwarf2_psymtab::read_symtab (struct objfile
*objfile
)
9014 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
9016 gdb_assert (!per_objfile
->symtab_set_p (per_cu_data
));
9018 /* If this psymtab is constructed from a debug-only objfile, the
9019 has_section_at_zero flag will not necessarily be correct. We
9020 can get the correct value for this flag by looking at the data
9021 associated with the (presumably stripped) associated objfile. */
9022 if (objfile
->separate_debug_objfile_backlink
)
9024 dwarf2_per_objfile
*per_objfile_backlink
9025 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
9027 per_objfile
->per_bfd
->has_section_at_zero
9028 = per_objfile_backlink
->per_bfd
->has_section_at_zero
;
9031 expand_psymtab (objfile
);
9033 process_cu_includes (per_objfile
);
9036 /* Reading in full CUs. */
9038 /* Add PER_CU to the queue. */
9041 queue_comp_unit (dwarf2_per_cu_data
*per_cu
,
9042 dwarf2_per_objfile
*per_objfile
,
9043 enum language pretend_language
)
9046 per_cu
->per_bfd
->queue
.emplace (per_cu
, per_objfile
, pretend_language
);
9049 /* If PER_CU is not yet queued, add it to the queue.
9050 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
9052 The result is non-zero if PER_CU was queued, otherwise the result is zero
9053 meaning either PER_CU is already queued or it is already loaded.
9055 N.B. There is an invariant here that if a CU is queued then it is loaded.
9056 The caller is required to load PER_CU if we return non-zero. */
9059 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
9060 dwarf2_per_cu_data
*per_cu
,
9061 dwarf2_per_objfile
*per_objfile
,
9062 enum language pretend_language
)
9064 /* We may arrive here during partial symbol reading, if we need full
9065 DIEs to process an unusual case (e.g. template arguments). Do
9066 not queue PER_CU, just tell our caller to load its DIEs. */
9067 if (per_cu
->per_bfd
->reading_partial_symbols
)
9069 dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
9071 if (cu
== NULL
|| cu
->dies
== NULL
)
9076 /* Mark the dependence relation so that we don't flush PER_CU
9078 if (dependent_cu
!= NULL
)
9079 dwarf2_add_dependence (dependent_cu
, per_cu
);
9081 /* If it's already on the queue, we have nothing to do. */
9085 /* If the compilation unit is already loaded, just mark it as
9087 dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
9094 /* Add it to the queue. */
9095 queue_comp_unit (per_cu
, per_objfile
, pretend_language
);
9100 /* Process the queue. */
9103 process_queue (dwarf2_per_objfile
*per_objfile
)
9105 if (dwarf_read_debug
)
9107 fprintf_unfiltered (gdb_stdlog
,
9108 "Expanding one or more symtabs of objfile %s ...\n",
9109 objfile_name (per_objfile
->objfile
));
9112 /* The queue starts out with one item, but following a DIE reference
9113 may load a new CU, adding it to the end of the queue. */
9114 while (!per_objfile
->per_bfd
->queue
.empty ())
9116 dwarf2_queue_item
&item
= per_objfile
->per_bfd
->queue
.front ();
9117 dwarf2_per_cu_data
*per_cu
= item
.per_cu
;
9119 if (!per_objfile
->symtab_set_p (per_cu
))
9121 dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
9123 /* Skip dummy CUs. */
9126 unsigned int debug_print_threshold
;
9129 if (per_cu
->is_debug_types
)
9131 struct signatured_type
*sig_type
=
9132 (struct signatured_type
*) per_cu
;
9134 sprintf (buf
, "TU %s at offset %s",
9135 hex_string (sig_type
->signature
),
9136 sect_offset_str (per_cu
->sect_off
));
9137 /* There can be 100s of TUs.
9138 Only print them in verbose mode. */
9139 debug_print_threshold
= 2;
9143 sprintf (buf
, "CU at offset %s",
9144 sect_offset_str (per_cu
->sect_off
));
9145 debug_print_threshold
= 1;
9148 if (dwarf_read_debug
>= debug_print_threshold
)
9149 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
9151 if (per_cu
->is_debug_types
)
9152 process_full_type_unit (cu
, item
.pretend_language
);
9154 process_full_comp_unit (cu
, item
.pretend_language
);
9156 if (dwarf_read_debug
>= debug_print_threshold
)
9157 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
9162 per_objfile
->per_bfd
->queue
.pop ();
9165 if (dwarf_read_debug
)
9167 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
9168 objfile_name (per_objfile
->objfile
));
9172 /* Read in full symbols for PST, and anything it depends on. */
9175 dwarf2_psymtab::expand_psymtab (struct objfile
*objfile
)
9177 gdb_assert (!readin_p (objfile
));
9179 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
9180 free_cached_comp_units
freer (per_objfile
);
9181 expand_dependencies (objfile
);
9183 dw2_do_instantiate_symtab (per_cu_data
, per_objfile
, false);
9184 gdb_assert (get_compunit_symtab (objfile
) != nullptr);
9187 /* See psympriv.h. */
9190 dwarf2_psymtab::readin_p (struct objfile
*objfile
) const
9192 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
9193 return per_objfile
->symtab_set_p (per_cu_data
);
9196 /* See psympriv.h. */
9199 dwarf2_psymtab::get_compunit_symtab (struct objfile
*objfile
) const
9201 dwarf2_per_objfile
*per_objfile
= get_dwarf2_per_objfile (objfile
);
9202 return per_objfile
->get_symtab (per_cu_data
);
9205 /* Trivial hash function for die_info: the hash value of a DIE
9206 is its offset in .debug_info for this objfile. */
9209 die_hash (const void *item
)
9211 const struct die_info
*die
= (const struct die_info
*) item
;
9213 return to_underlying (die
->sect_off
);
9216 /* Trivial comparison function for die_info structures: two DIEs
9217 are equal if they have the same offset. */
9220 die_eq (const void *item_lhs
, const void *item_rhs
)
9222 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9223 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9225 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9228 /* Load the DIEs associated with PER_CU into memory. */
9231 load_full_comp_unit (dwarf2_per_cu_data
*this_cu
,
9232 dwarf2_per_objfile
*per_objfile
,
9234 enum language pretend_language
)
9236 gdb_assert (! this_cu
->is_debug_types
);
9238 dwarf2_cu
*existing_cu
= per_objfile
->get_cu (this_cu
);
9239 cutu_reader
reader (this_cu
, per_objfile
, NULL
, existing_cu
, skip_partial
);
9243 struct dwarf2_cu
*cu
= reader
.cu
;
9244 const gdb_byte
*info_ptr
= reader
.info_ptr
;
9246 gdb_assert (cu
->die_hash
== NULL
);
9248 htab_create_alloc_ex (cu
->header
.length
/ 12,
9252 &cu
->comp_unit_obstack
,
9253 hashtab_obstack_allocate
,
9254 dummy_obstack_deallocate
);
9256 if (reader
.comp_unit_die
->has_children
)
9257 reader
.comp_unit_die
->child
9258 = read_die_and_siblings (&reader
, reader
.info_ptr
,
9259 &info_ptr
, reader
.comp_unit_die
);
9260 cu
->dies
= reader
.comp_unit_die
;
9261 /* comp_unit_die is not stored in die_hash, no need. */
9263 /* We try not to read any attributes in this function, because not
9264 all CUs needed for references have been loaded yet, and symbol
9265 table processing isn't initialized. But we have to set the CU language,
9266 or we won't be able to build types correctly.
9267 Similarly, if we do not read the producer, we can not apply
9268 producer-specific interpretation. */
9269 prepare_one_comp_unit (cu
, cu
->dies
, pretend_language
);
9274 /* Add a DIE to the delayed physname list. */
9277 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9278 const char *name
, struct die_info
*die
,
9279 struct dwarf2_cu
*cu
)
9281 struct delayed_method_info mi
;
9283 mi
.fnfield_index
= fnfield_index
;
9287 cu
->method_list
.push_back (mi
);
9290 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9291 "const" / "volatile". If so, decrements LEN by the length of the
9292 modifier and return true. Otherwise return false. */
9296 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9298 size_t mod_len
= sizeof (mod
) - 1;
9299 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9307 /* Compute the physnames of any methods on the CU's method list.
9309 The computation of method physnames is delayed in order to avoid the
9310 (bad) condition that one of the method's formal parameters is of an as yet
9314 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9316 /* Only C++ delays computing physnames. */
9317 if (cu
->method_list
.empty ())
9319 gdb_assert (cu
->language
== language_cplus
);
9321 for (const delayed_method_info
&mi
: cu
->method_list
)
9323 const char *physname
;
9324 struct fn_fieldlist
*fn_flp
9325 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9326 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9327 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9328 = physname
? physname
: "";
9330 /* Since there's no tag to indicate whether a method is a
9331 const/volatile overload, extract that information out of the
9333 if (physname
!= NULL
)
9335 size_t len
= strlen (physname
);
9339 if (physname
[len
] == ')') /* shortcut */
9341 else if (check_modifier (physname
, len
, " const"))
9342 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9343 else if (check_modifier (physname
, len
, " volatile"))
9344 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9351 /* The list is no longer needed. */
9352 cu
->method_list
.clear ();
9355 /* Go objects should be embedded in a DW_TAG_module DIE,
9356 and it's not clear if/how imported objects will appear.
9357 To keep Go support simple until that's worked out,
9358 go back through what we've read and create something usable.
9359 We could do this while processing each DIE, and feels kinda cleaner,
9360 but that way is more invasive.
9361 This is to, for example, allow the user to type "p var" or "b main"
9362 without having to specify the package name, and allow lookups
9363 of module.object to work in contexts that use the expression
9367 fixup_go_packaging (struct dwarf2_cu
*cu
)
9369 gdb::unique_xmalloc_ptr
<char> package_name
;
9370 struct pending
*list
;
9373 for (list
= *cu
->get_builder ()->get_global_symbols ();
9377 for (i
= 0; i
< list
->nsyms
; ++i
)
9379 struct symbol
*sym
= list
->symbol
[i
];
9381 if (sym
->language () == language_go
9382 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9384 gdb::unique_xmalloc_ptr
<char> this_package_name
9385 (go_symbol_package_name (sym
));
9387 if (this_package_name
== NULL
)
9389 if (package_name
== NULL
)
9390 package_name
= std::move (this_package_name
);
9393 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
9394 if (strcmp (package_name
.get (), this_package_name
.get ()) != 0)
9395 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9396 (symbol_symtab (sym
) != NULL
9397 ? symtab_to_filename_for_display
9398 (symbol_symtab (sym
))
9399 : objfile_name (objfile
)),
9400 this_package_name
.get (), package_name
.get ());
9406 if (package_name
!= NULL
)
9408 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
9409 const char *saved_package_name
= objfile
->intern (package_name
.get ());
9410 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9411 saved_package_name
);
9414 sym
= new (&objfile
->objfile_obstack
) symbol
;
9415 sym
->set_language (language_go
, &objfile
->objfile_obstack
);
9416 sym
->compute_and_set_names (saved_package_name
, false, objfile
->per_bfd
);
9417 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9418 e.g., "main" finds the "main" module and not C's main(). */
9419 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9420 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9421 SYMBOL_TYPE (sym
) = type
;
9423 add_symbol_to_list (sym
, cu
->get_builder ()->get_global_symbols ());
9427 /* Allocate a fully-qualified name consisting of the two parts on the
9431 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9433 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9436 /* A helper that allocates a variant part to attach to a Rust enum
9437 type. OBSTACK is where the results should be allocated. TYPE is
9438 the type we're processing. DISCRIMINANT_INDEX is the index of the
9439 discriminant. It must be the index of one of the fields of TYPE,
9440 or -1 to mean there is no discriminant (univariant enum).
9441 DEFAULT_INDEX is the index of the default field; or -1 if there is
9442 no default. RANGES is indexed by "effective" field number (the
9443 field index, but omitting the discriminant and default fields) and
9444 must hold the discriminant values used by the variants. Note that
9445 RANGES must have a lifetime at least as long as OBSTACK -- either
9446 already allocated on it, or static. */
9449 alloc_rust_variant (struct obstack
*obstack
, struct type
*type
,
9450 int discriminant_index
, int default_index
,
9451 gdb::array_view
<discriminant_range
> ranges
)
9453 /* When DISCRIMINANT_INDEX == -1, we have a univariant enum. */
9454 gdb_assert (discriminant_index
== -1
9455 || (discriminant_index
>= 0
9456 && discriminant_index
< type
->num_fields ()));
9457 gdb_assert (default_index
== -1
9458 || (default_index
>= 0 && default_index
< type
->num_fields ()));
9460 /* We have one variant for each non-discriminant field. */
9461 int n_variants
= type
->num_fields ();
9462 if (discriminant_index
!= -1)
9465 variant
*variants
= new (obstack
) variant
[n_variants
];
9468 for (int i
= 0; i
< type
->num_fields (); ++i
)
9470 if (i
== discriminant_index
)
9473 variants
[var_idx
].first_field
= i
;
9474 variants
[var_idx
].last_field
= i
+ 1;
9476 /* The default field does not need a range, but other fields do.
9477 We skipped the discriminant above. */
9478 if (i
!= default_index
)
9480 variants
[var_idx
].discriminants
= ranges
.slice (range_idx
, 1);
9487 gdb_assert (range_idx
== ranges
.size ());
9488 gdb_assert (var_idx
== n_variants
);
9490 variant_part
*part
= new (obstack
) variant_part
;
9491 part
->discriminant_index
= discriminant_index
;
9492 /* If there is no discriminant, then whether it is signed is of no
9495 = (discriminant_index
== -1
9497 : type
->field (discriminant_index
).type ()->is_unsigned ());
9498 part
->variants
= gdb::array_view
<variant
> (variants
, n_variants
);
9500 void *storage
= obstack_alloc (obstack
, sizeof (gdb::array_view
<variant_part
>));
9501 gdb::array_view
<variant_part
> *prop_value
9502 = new (storage
) gdb::array_view
<variant_part
> (part
, 1);
9504 struct dynamic_prop prop
;
9505 prop
.set_variant_parts (prop_value
);
9507 type
->add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
);
9510 /* Some versions of rustc emitted enums in an unusual way.
9512 Ordinary enums were emitted as unions. The first element of each
9513 structure in the union was named "RUST$ENUM$DISR". This element
9514 held the discriminant.
9516 These versions of Rust also implemented the "non-zero"
9517 optimization. When the enum had two values, and one is empty and
9518 the other holds a pointer that cannot be zero, the pointer is used
9519 as the discriminant, with a zero value meaning the empty variant.
9520 Here, the union's first member is of the form
9521 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9522 where the fieldnos are the indices of the fields that should be
9523 traversed in order to find the field (which may be several fields deep)
9524 and the variantname is the name of the variant of the case when the
9527 This function recognizes whether TYPE is of one of these forms,
9528 and, if so, smashes it to be a variant type. */
9531 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9533 gdb_assert (type
->code () == TYPE_CODE_UNION
);
9535 /* We don't need to deal with empty enums. */
9536 if (type
->num_fields () == 0)
9539 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9540 if (type
->num_fields () == 1
9541 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9543 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9545 /* Decode the field name to find the offset of the
9547 ULONGEST bit_offset
= 0;
9548 struct type
*field_type
= type
->field (0).type ();
9549 while (name
[0] >= '0' && name
[0] <= '9')
9552 unsigned long index
= strtoul (name
, &tail
, 10);
9555 || index
>= field_type
->num_fields ()
9556 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9557 != FIELD_LOC_KIND_BITPOS
))
9559 complaint (_("Could not parse Rust enum encoding string \"%s\""
9561 TYPE_FIELD_NAME (type
, 0),
9562 objfile_name (objfile
));
9567 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9568 field_type
= field_type
->field (index
).type ();
9571 /* Smash this type to be a structure type. We have to do this
9572 because the type has already been recorded. */
9573 type
->set_code (TYPE_CODE_STRUCT
);
9574 type
->set_num_fields (3);
9575 /* Save the field we care about. */
9576 struct field saved_field
= type
->field (0);
9578 ((struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
)));
9580 /* Put the discriminant at index 0. */
9581 type
->field (0).set_type (field_type
);
9582 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9583 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9584 SET_FIELD_BITPOS (type
->field (0), bit_offset
);
9586 /* The order of fields doesn't really matter, so put the real
9587 field at index 1 and the data-less field at index 2. */
9588 type
->field (1) = saved_field
;
9589 TYPE_FIELD_NAME (type
, 1)
9590 = rust_last_path_segment (type
->field (1).type ()->name ());
9591 type
->field (1).type ()->set_name
9592 (rust_fully_qualify (&objfile
->objfile_obstack
, type
->name (),
9593 TYPE_FIELD_NAME (type
, 1)));
9595 const char *dataless_name
9596 = rust_fully_qualify (&objfile
->objfile_obstack
, type
->name (),
9598 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9600 type
->field (2).set_type (dataless_type
);
9601 /* NAME points into the original discriminant name, which
9602 already has the correct lifetime. */
9603 TYPE_FIELD_NAME (type
, 2) = name
;
9604 SET_FIELD_BITPOS (type
->field (2), 0);
9606 /* Indicate that this is a variant type. */
9607 static discriminant_range ranges
[1] = { { 0, 0 } };
9608 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, 1, ranges
);
9610 /* A union with a single anonymous field is probably an old-style
9612 else if (type
->num_fields () == 1 && streq (TYPE_FIELD_NAME (type
, 0), ""))
9614 /* Smash this type to be a structure type. We have to do this
9615 because the type has already been recorded. */
9616 type
->set_code (TYPE_CODE_STRUCT
);
9618 struct type
*field_type
= type
->field (0).type ();
9619 const char *variant_name
9620 = rust_last_path_segment (field_type
->name ());
9621 TYPE_FIELD_NAME (type
, 0) = variant_name
;
9622 field_type
->set_name
9623 (rust_fully_qualify (&objfile
->objfile_obstack
,
9624 type
->name (), variant_name
));
9626 alloc_rust_variant (&objfile
->objfile_obstack
, type
, -1, 0, {});
9630 struct type
*disr_type
= nullptr;
9631 for (int i
= 0; i
< type
->num_fields (); ++i
)
9633 disr_type
= type
->field (i
).type ();
9635 if (disr_type
->code () != TYPE_CODE_STRUCT
)
9637 /* All fields of a true enum will be structs. */
9640 else if (disr_type
->num_fields () == 0)
9642 /* Could be data-less variant, so keep going. */
9643 disr_type
= nullptr;
9645 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
9646 "RUST$ENUM$DISR") != 0)
9648 /* Not a Rust enum. */
9658 /* If we got here without a discriminant, then it's probably
9660 if (disr_type
== nullptr)
9663 /* Smash this type to be a structure type. We have to do this
9664 because the type has already been recorded. */
9665 type
->set_code (TYPE_CODE_STRUCT
);
9667 /* Make space for the discriminant field. */
9668 struct field
*disr_field
= &disr_type
->field (0);
9670 = (struct field
*) TYPE_ZALLOC (type
, ((type
->num_fields () + 1)
9671 * sizeof (struct field
)));
9672 memcpy (new_fields
+ 1, type
->fields (),
9673 type
->num_fields () * sizeof (struct field
));
9674 type
->set_fields (new_fields
);
9675 type
->set_num_fields (type
->num_fields () + 1);
9677 /* Install the discriminant at index 0 in the union. */
9678 type
->field (0) = *disr_field
;
9679 TYPE_FIELD_ARTIFICIAL (type
, 0) = 1;
9680 TYPE_FIELD_NAME (type
, 0) = "<<discriminant>>";
9682 /* We need a way to find the correct discriminant given a
9683 variant name. For convenience we build a map here. */
9684 struct type
*enum_type
= disr_field
->type ();
9685 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
9686 for (int i
= 0; i
< enum_type
->num_fields (); ++i
)
9688 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
9691 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
9692 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
9696 int n_fields
= type
->num_fields ();
9697 /* We don't need a range entry for the discriminant, but we do
9698 need one for every other field, as there is no default
9700 discriminant_range
*ranges
= XOBNEWVEC (&objfile
->objfile_obstack
,
9703 /* Skip the discriminant here. */
9704 for (int i
= 1; i
< n_fields
; ++i
)
9706 /* Find the final word in the name of this variant's type.
9707 That name can be used to look up the correct
9709 const char *variant_name
9710 = rust_last_path_segment (type
->field (i
).type ()->name ());
9712 auto iter
= discriminant_map
.find (variant_name
);
9713 if (iter
!= discriminant_map
.end ())
9715 ranges
[i
- 1].low
= iter
->second
;
9716 ranges
[i
- 1].high
= iter
->second
;
9719 /* In Rust, each element should have the size of the
9721 TYPE_LENGTH (type
->field (i
).type ()) = TYPE_LENGTH (type
);
9723 /* Remove the discriminant field, if it exists. */
9724 struct type
*sub_type
= type
->field (i
).type ();
9725 if (sub_type
->num_fields () > 0)
9727 sub_type
->set_num_fields (sub_type
->num_fields () - 1);
9728 sub_type
->set_fields (sub_type
->fields () + 1);
9730 TYPE_FIELD_NAME (type
, i
) = variant_name
;
9732 (rust_fully_qualify (&objfile
->objfile_obstack
,
9733 type
->name (), variant_name
));
9736 /* Indicate that this is a variant type. */
9737 alloc_rust_variant (&objfile
->objfile_obstack
, type
, 0, -1,
9738 gdb::array_view
<discriminant_range
> (ranges
,
9743 /* Rewrite some Rust unions to be structures with variants parts. */
9746 rust_union_quirks (struct dwarf2_cu
*cu
)
9748 gdb_assert (cu
->language
== language_rust
);
9749 for (type
*type_
: cu
->rust_unions
)
9750 quirk_rust_enum (type_
, cu
->per_objfile
->objfile
);
9751 /* We don't need this any more. */
9752 cu
->rust_unions
.clear ();
9757 type_unit_group_unshareable
*
9758 dwarf2_per_objfile::get_type_unit_group_unshareable (type_unit_group
*tu_group
)
9760 auto iter
= this->m_type_units
.find (tu_group
);
9761 if (iter
!= this->m_type_units
.end ())
9762 return iter
->second
.get ();
9764 type_unit_group_unshareable_up
uniq (new type_unit_group_unshareable
);
9765 type_unit_group_unshareable
*result
= uniq
.get ();
9766 this->m_type_units
[tu_group
] = std::move (uniq
);
9771 dwarf2_per_objfile::get_type_for_signatured_type
9772 (signatured_type
*sig_type
) const
9774 auto iter
= this->m_type_map
.find (sig_type
);
9775 if (iter
== this->m_type_map
.end ())
9778 return iter
->second
;
9781 void dwarf2_per_objfile::set_type_for_signatured_type
9782 (signatured_type
*sig_type
, struct type
*type
)
9784 gdb_assert (this->m_type_map
.find (sig_type
) == this->m_type_map
.end ());
9786 this->m_type_map
[sig_type
] = type
;
9789 /* A helper function for computing the list of all symbol tables
9790 included by PER_CU. */
9793 recursively_compute_inclusions (std::vector
<compunit_symtab
*> *result
,
9794 htab_t all_children
, htab_t all_type_symtabs
,
9795 dwarf2_per_cu_data
*per_cu
,
9796 dwarf2_per_objfile
*per_objfile
,
9797 struct compunit_symtab
*immediate_parent
)
9799 void **slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
9802 /* This inclusion and its children have been processed. */
9808 /* Only add a CU if it has a symbol table. */
9809 compunit_symtab
*cust
= per_objfile
->get_symtab (per_cu
);
9812 /* If this is a type unit only add its symbol table if we haven't
9813 seen it yet (type unit per_cu's can share symtabs). */
9814 if (per_cu
->is_debug_types
)
9816 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
9820 result
->push_back (cust
);
9821 if (cust
->user
== NULL
)
9822 cust
->user
= immediate_parent
;
9827 result
->push_back (cust
);
9828 if (cust
->user
== NULL
)
9829 cust
->user
= immediate_parent
;
9833 if (!per_cu
->imported_symtabs_empty ())
9834 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9836 recursively_compute_inclusions (result
, all_children
,
9837 all_type_symtabs
, ptr
, per_objfile
,
9842 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
9846 compute_compunit_symtab_includes (dwarf2_per_cu_data
*per_cu
,
9847 dwarf2_per_objfile
*per_objfile
)
9849 gdb_assert (! per_cu
->is_debug_types
);
9851 if (!per_cu
->imported_symtabs_empty ())
9854 std::vector
<compunit_symtab
*> result_symtabs
;
9855 compunit_symtab
*cust
= per_objfile
->get_symtab (per_cu
);
9857 /* If we don't have a symtab, we can just skip this case. */
9861 htab_up
all_children (htab_create_alloc (1, htab_hash_pointer
,
9863 NULL
, xcalloc
, xfree
));
9864 htab_up
all_type_symtabs (htab_create_alloc (1, htab_hash_pointer
,
9866 NULL
, xcalloc
, xfree
));
9868 for (dwarf2_per_cu_data
*ptr
: *per_cu
->imported_symtabs
)
9870 recursively_compute_inclusions (&result_symtabs
, all_children
.get (),
9871 all_type_symtabs
.get (), ptr
,
9875 /* Now we have a transitive closure of all the included symtabs. */
9876 len
= result_symtabs
.size ();
9878 = XOBNEWVEC (&per_objfile
->objfile
->objfile_obstack
,
9879 struct compunit_symtab
*, len
+ 1);
9880 memcpy (cust
->includes
, result_symtabs
.data (),
9881 len
* sizeof (compunit_symtab
*));
9882 cust
->includes
[len
] = NULL
;
9886 /* Compute the 'includes' field for the symtabs of all the CUs we just
9890 process_cu_includes (dwarf2_per_objfile
*per_objfile
)
9892 for (dwarf2_per_cu_data
*iter
: per_objfile
->per_bfd
->just_read_cus
)
9894 if (! iter
->is_debug_types
)
9895 compute_compunit_symtab_includes (iter
, per_objfile
);
9898 per_objfile
->per_bfd
->just_read_cus
.clear ();
9901 /* Generate full symbol information for CU, whose DIEs have
9902 already been loaded into memory. */
9905 process_full_comp_unit (dwarf2_cu
*cu
, enum language pretend_language
)
9907 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
9908 struct objfile
*objfile
= per_objfile
->objfile
;
9909 struct gdbarch
*gdbarch
= objfile
->arch ();
9910 CORE_ADDR lowpc
, highpc
;
9911 struct compunit_symtab
*cust
;
9913 struct block
*static_block
;
9916 baseaddr
= objfile
->text_section_offset ();
9918 /* Clear the list here in case something was left over. */
9919 cu
->method_list
.clear ();
9921 cu
->language
= pretend_language
;
9922 cu
->language_defn
= language_def (cu
->language
);
9924 /* Do line number decoding in read_file_scope () */
9925 process_die (cu
->dies
, cu
);
9927 /* For now fudge the Go package. */
9928 if (cu
->language
== language_go
)
9929 fixup_go_packaging (cu
);
9931 /* Now that we have processed all the DIEs in the CU, all the types
9932 should be complete, and it should now be safe to compute all of the
9934 compute_delayed_physnames (cu
);
9936 if (cu
->language
== language_rust
)
9937 rust_union_quirks (cu
);
9939 /* Some compilers don't define a DW_AT_high_pc attribute for the
9940 compilation unit. If the DW_AT_high_pc is missing, synthesize
9941 it, by scanning the DIE's below the compilation unit. */
9942 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
9944 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
9945 static_block
= cu
->get_builder ()->end_symtab_get_static_block (addr
, 0, 1);
9947 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
9948 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
9949 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
9950 addrmap to help ensure it has an accurate map of pc values belonging to
9952 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
9954 cust
= cu
->get_builder ()->end_symtab_from_static_block (static_block
,
9955 SECT_OFF_TEXT (objfile
),
9960 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
9962 /* Set symtab language to language from DW_AT_language. If the
9963 compilation is from a C file generated by language preprocessors, do
9964 not set the language if it was already deduced by start_subfile. */
9965 if (!(cu
->language
== language_c
9966 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
9967 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
9969 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
9970 produce DW_AT_location with location lists but it can be possibly
9971 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
9972 there were bugs in prologue debug info, fixed later in GCC-4.5
9973 by "unwind info for epilogues" patch (which is not directly related).
9975 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
9976 needed, it would be wrong due to missing DW_AT_producer there.
9978 Still one can confuse GDB by using non-standard GCC compilation
9979 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
9981 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
9982 cust
->locations_valid
= 1;
9984 if (gcc_4_minor
>= 5)
9985 cust
->epilogue_unwind_valid
= 1;
9987 cust
->call_site_htab
= cu
->call_site_htab
;
9990 per_objfile
->set_symtab (cu
->per_cu
, cust
);
9992 /* Push it for inclusion processing later. */
9993 per_objfile
->per_bfd
->just_read_cus
.push_back (cu
->per_cu
);
9995 /* Not needed any more. */
9996 cu
->reset_builder ();
9999 /* Generate full symbol information for type unit CU, whose DIEs have
10000 already been loaded into memory. */
10003 process_full_type_unit (dwarf2_cu
*cu
,
10004 enum language pretend_language
)
10006 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
10007 struct objfile
*objfile
= per_objfile
->objfile
;
10008 struct compunit_symtab
*cust
;
10009 struct signatured_type
*sig_type
;
10011 gdb_assert (cu
->per_cu
->is_debug_types
);
10012 sig_type
= (struct signatured_type
*) cu
->per_cu
;
10014 /* Clear the list here in case something was left over. */
10015 cu
->method_list
.clear ();
10017 cu
->language
= pretend_language
;
10018 cu
->language_defn
= language_def (cu
->language
);
10020 /* The symbol tables are set up in read_type_unit_scope. */
10021 process_die (cu
->dies
, cu
);
10023 /* For now fudge the Go package. */
10024 if (cu
->language
== language_go
)
10025 fixup_go_packaging (cu
);
10027 /* Now that we have processed all the DIEs in the CU, all the types
10028 should be complete, and it should now be safe to compute all of the
10030 compute_delayed_physnames (cu
);
10032 if (cu
->language
== language_rust
)
10033 rust_union_quirks (cu
);
10035 /* TUs share symbol tables.
10036 If this is the first TU to use this symtab, complete the construction
10037 of it with end_expandable_symtab. Otherwise, complete the addition of
10038 this TU's symbols to the existing symtab. */
10039 type_unit_group_unshareable
*tug_unshare
=
10040 per_objfile
->get_type_unit_group_unshareable (sig_type
->type_unit_group
);
10041 if (tug_unshare
->compunit_symtab
== NULL
)
10043 buildsym_compunit
*builder
= cu
->get_builder ();
10044 cust
= builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
10045 tug_unshare
->compunit_symtab
= cust
;
10049 /* Set symtab language to language from DW_AT_language. If the
10050 compilation is from a C file generated by language preprocessors,
10051 do not set the language if it was already deduced by
10053 if (!(cu
->language
== language_c
10054 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
10055 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10060 cu
->get_builder ()->augment_type_symtab ();
10061 cust
= tug_unshare
->compunit_symtab
;
10064 per_objfile
->set_symtab (cu
->per_cu
, cust
);
10066 /* Not needed any more. */
10067 cu
->reset_builder ();
10070 /* Process an imported unit DIE. */
10073 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10075 struct attribute
*attr
;
10077 /* For now we don't handle imported units in type units. */
10078 if (cu
->per_cu
->is_debug_types
)
10080 error (_("Dwarf Error: DW_TAG_imported_unit is not"
10081 " supported in type units [in module %s]"),
10082 objfile_name (cu
->per_objfile
->objfile
));
10085 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10088 sect_offset sect_off
= attr
->get_ref_die_offset ();
10089 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
10090 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
10091 dwarf2_per_cu_data
*per_cu
10092 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
, per_objfile
);
10094 /* We're importing a C++ compilation unit with tag DW_TAG_compile_unit
10095 into another compilation unit, at root level. Regard this as a hint,
10097 if (die
->parent
&& die
->parent
->parent
== NULL
10098 && per_cu
->unit_type
== DW_UT_compile
10099 && per_cu
->lang
== language_cplus
)
10102 /* If necessary, add it to the queue and load its DIEs. */
10103 if (maybe_queue_comp_unit (cu
, per_cu
, per_objfile
, cu
->language
))
10104 load_full_comp_unit (per_cu
, per_objfile
, false, cu
->language
);
10106 cu
->per_cu
->imported_symtabs_push (per_cu
);
10110 /* RAII object that represents a process_die scope: i.e.,
10111 starts/finishes processing a DIE. */
10112 class process_die_scope
10115 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
10116 : m_die (die
), m_cu (cu
)
10118 /* We should only be processing DIEs not already in process. */
10119 gdb_assert (!m_die
->in_process
);
10120 m_die
->in_process
= true;
10123 ~process_die_scope ()
10125 m_die
->in_process
= false;
10127 /* If we're done processing the DIE for the CU that owns the line
10128 header, we don't need the line header anymore. */
10129 if (m_cu
->line_header_die_owner
== m_die
)
10131 delete m_cu
->line_header
;
10132 m_cu
->line_header
= NULL
;
10133 m_cu
->line_header_die_owner
= NULL
;
10142 /* Process a die and its children. */
10145 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10147 process_die_scope
scope (die
, cu
);
10151 case DW_TAG_padding
:
10153 case DW_TAG_compile_unit
:
10154 case DW_TAG_partial_unit
:
10155 read_file_scope (die
, cu
);
10157 case DW_TAG_type_unit
:
10158 read_type_unit_scope (die
, cu
);
10160 case DW_TAG_subprogram
:
10161 /* Nested subprograms in Fortran get a prefix. */
10162 if (cu
->language
== language_fortran
10163 && die
->parent
!= NULL
10164 && die
->parent
->tag
== DW_TAG_subprogram
)
10165 cu
->processing_has_namespace_info
= true;
10166 /* Fall through. */
10167 case DW_TAG_inlined_subroutine
:
10168 read_func_scope (die
, cu
);
10170 case DW_TAG_lexical_block
:
10171 case DW_TAG_try_block
:
10172 case DW_TAG_catch_block
:
10173 read_lexical_block_scope (die
, cu
);
10175 case DW_TAG_call_site
:
10176 case DW_TAG_GNU_call_site
:
10177 read_call_site_scope (die
, cu
);
10179 case DW_TAG_class_type
:
10180 case DW_TAG_interface_type
:
10181 case DW_TAG_structure_type
:
10182 case DW_TAG_union_type
:
10183 process_structure_scope (die
, cu
);
10185 case DW_TAG_enumeration_type
:
10186 process_enumeration_scope (die
, cu
);
10189 /* These dies have a type, but processing them does not create
10190 a symbol or recurse to process the children. Therefore we can
10191 read them on-demand through read_type_die. */
10192 case DW_TAG_subroutine_type
:
10193 case DW_TAG_set_type
:
10194 case DW_TAG_array_type
:
10195 case DW_TAG_pointer_type
:
10196 case DW_TAG_ptr_to_member_type
:
10197 case DW_TAG_reference_type
:
10198 case DW_TAG_rvalue_reference_type
:
10199 case DW_TAG_string_type
:
10202 case DW_TAG_base_type
:
10203 case DW_TAG_subrange_type
:
10204 case DW_TAG_typedef
:
10205 /* Add a typedef symbol for the type definition, if it has a
10207 new_symbol (die
, read_type_die (die
, cu
), cu
);
10209 case DW_TAG_common_block
:
10210 read_common_block (die
, cu
);
10212 case DW_TAG_common_inclusion
:
10214 case DW_TAG_namespace
:
10215 cu
->processing_has_namespace_info
= true;
10216 read_namespace (die
, cu
);
10218 case DW_TAG_module
:
10219 cu
->processing_has_namespace_info
= true;
10220 read_module (die
, cu
);
10222 case DW_TAG_imported_declaration
:
10223 cu
->processing_has_namespace_info
= true;
10224 if (read_namespace_alias (die
, cu
))
10226 /* The declaration is not a global namespace alias. */
10227 /* Fall through. */
10228 case DW_TAG_imported_module
:
10229 cu
->processing_has_namespace_info
= true;
10230 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10231 || cu
->language
!= language_fortran
))
10232 complaint (_("Tag '%s' has unexpected children"),
10233 dwarf_tag_name (die
->tag
));
10234 read_import_statement (die
, cu
);
10237 case DW_TAG_imported_unit
:
10238 process_imported_unit_die (die
, cu
);
10241 case DW_TAG_variable
:
10242 read_variable (die
, cu
);
10246 new_symbol (die
, NULL
, cu
);
10251 /* DWARF name computation. */
10253 /* A helper function for dwarf2_compute_name which determines whether DIE
10254 needs to have the name of the scope prepended to the name listed in the
10258 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10260 struct attribute
*attr
;
10264 case DW_TAG_namespace
:
10265 case DW_TAG_typedef
:
10266 case DW_TAG_class_type
:
10267 case DW_TAG_interface_type
:
10268 case DW_TAG_structure_type
:
10269 case DW_TAG_union_type
:
10270 case DW_TAG_enumeration_type
:
10271 case DW_TAG_enumerator
:
10272 case DW_TAG_subprogram
:
10273 case DW_TAG_inlined_subroutine
:
10274 case DW_TAG_member
:
10275 case DW_TAG_imported_declaration
:
10278 case DW_TAG_variable
:
10279 case DW_TAG_constant
:
10280 /* We only need to prefix "globally" visible variables. These include
10281 any variable marked with DW_AT_external or any variable that
10282 lives in a namespace. [Variables in anonymous namespaces
10283 require prefixing, but they are not DW_AT_external.] */
10285 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10287 struct dwarf2_cu
*spec_cu
= cu
;
10289 return die_needs_namespace (die_specification (die
, &spec_cu
),
10293 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10294 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10295 && die
->parent
->tag
!= DW_TAG_module
)
10297 /* A variable in a lexical block of some kind does not need a
10298 namespace, even though in C++ such variables may be external
10299 and have a mangled name. */
10300 if (die
->parent
->tag
== DW_TAG_lexical_block
10301 || die
->parent
->tag
== DW_TAG_try_block
10302 || die
->parent
->tag
== DW_TAG_catch_block
10303 || die
->parent
->tag
== DW_TAG_subprogram
)
10312 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10313 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10314 defined for the given DIE. */
10316 static struct attribute
*
10317 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10319 struct attribute
*attr
;
10321 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10323 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10328 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10329 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10330 defined for the given DIE. */
10332 static const char *
10333 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10335 const char *linkage_name
;
10337 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10338 if (linkage_name
== NULL
)
10339 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10341 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10342 See https://github.com/rust-lang/rust/issues/32925. */
10343 if (cu
->language
== language_rust
&& linkage_name
!= NULL
10344 && strchr (linkage_name
, '{') != NULL
)
10345 linkage_name
= NULL
;
10347 return linkage_name
;
10350 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10351 compute the physname for the object, which include a method's:
10352 - formal parameters (C++),
10353 - receiver type (Go),
10355 The term "physname" is a bit confusing.
10356 For C++, for example, it is the demangled name.
10357 For Go, for example, it's the mangled name.
10359 For Ada, return the DIE's linkage name rather than the fully qualified
10360 name. PHYSNAME is ignored..
10362 The result is allocated on the objfile->per_bfd's obstack and
10365 static const char *
10366 dwarf2_compute_name (const char *name
,
10367 struct die_info
*die
, struct dwarf2_cu
*cu
,
10370 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
10373 name
= dwarf2_name (die
, cu
);
10375 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10376 but otherwise compute it by typename_concat inside GDB.
10377 FIXME: Actually this is not really true, or at least not always true.
10378 It's all very confusing. compute_and_set_names doesn't try to demangle
10379 Fortran names because there is no mangling standard. So new_symbol
10380 will set the demangled name to the result of dwarf2_full_name, and it is
10381 the demangled name that GDB uses if it exists. */
10382 if (cu
->language
== language_ada
10383 || (cu
->language
== language_fortran
&& physname
))
10385 /* For Ada unit, we prefer the linkage name over the name, as
10386 the former contains the exported name, which the user expects
10387 to be able to reference. Ideally, we want the user to be able
10388 to reference this entity using either natural or linkage name,
10389 but we haven't started looking at this enhancement yet. */
10390 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10392 if (linkage_name
!= NULL
)
10393 return linkage_name
;
10396 /* These are the only languages we know how to qualify names in. */
10398 && (cu
->language
== language_cplus
10399 || cu
->language
== language_fortran
|| cu
->language
== language_d
10400 || cu
->language
== language_rust
))
10402 if (die_needs_namespace (die
, cu
))
10404 const char *prefix
;
10405 const char *canonical_name
= NULL
;
10409 prefix
= determine_prefix (die
, cu
);
10410 if (*prefix
!= '\0')
10412 gdb::unique_xmalloc_ptr
<char> prefixed_name
10413 (typename_concat (NULL
, prefix
, name
, physname
, cu
));
10415 buf
.puts (prefixed_name
.get ());
10420 /* Template parameters may be specified in the DIE's DW_AT_name, or
10421 as children with DW_TAG_template_type_param or
10422 DW_TAG_value_type_param. If the latter, add them to the name
10423 here. If the name already has template parameters, then
10424 skip this step; some versions of GCC emit both, and
10425 it is more efficient to use the pre-computed name.
10427 Something to keep in mind about this process: it is very
10428 unlikely, or in some cases downright impossible, to produce
10429 something that will match the mangled name of a function.
10430 If the definition of the function has the same debug info,
10431 we should be able to match up with it anyway. But fallbacks
10432 using the minimal symbol, for instance to find a method
10433 implemented in a stripped copy of libstdc++, will not work.
10434 If we do not have debug info for the definition, we will have to
10435 match them up some other way.
10437 When we do name matching there is a related problem with function
10438 templates; two instantiated function templates are allowed to
10439 differ only by their return types, which we do not add here. */
10441 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10443 struct attribute
*attr
;
10444 struct die_info
*child
;
10447 die
->building_fullname
= 1;
10449 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10453 const gdb_byte
*bytes
;
10454 struct dwarf2_locexpr_baton
*baton
;
10457 if (child
->tag
!= DW_TAG_template_type_param
10458 && child
->tag
!= DW_TAG_template_value_param
)
10469 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10472 complaint (_("template parameter missing DW_AT_type"));
10473 buf
.puts ("UNKNOWN_TYPE");
10476 type
= die_type (child
, cu
);
10478 if (child
->tag
== DW_TAG_template_type_param
)
10480 c_print_type (type
, "", &buf
, -1, 0, cu
->language
,
10481 &type_print_raw_options
);
10485 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10488 complaint (_("template parameter missing "
10489 "DW_AT_const_value"));
10490 buf
.puts ("UNKNOWN_VALUE");
10494 dwarf2_const_value_attr (attr
, type
, name
,
10495 &cu
->comp_unit_obstack
, cu
,
10496 &value
, &bytes
, &baton
);
10498 if (type
->has_no_signedness ())
10499 /* GDB prints characters as NUMBER 'CHAR'. If that's
10500 changed, this can use value_print instead. */
10501 c_printchar (value
, type
, &buf
);
10504 struct value_print_options opts
;
10507 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10511 baton
->per_objfile
);
10512 else if (bytes
!= NULL
)
10514 v
= allocate_value (type
);
10515 memcpy (value_contents_writeable (v
), bytes
,
10516 TYPE_LENGTH (type
));
10519 v
= value_from_longest (type
, value
);
10521 /* Specify decimal so that we do not depend on
10523 get_formatted_print_options (&opts
, 'd');
10525 value_print (v
, &buf
, &opts
);
10530 die
->building_fullname
= 0;
10534 /* Close the argument list, with a space if necessary
10535 (nested templates). */
10536 if (!buf
.empty () && buf
.string ().back () == '>')
10543 /* For C++ methods, append formal parameter type
10544 information, if PHYSNAME. */
10546 if (physname
&& die
->tag
== DW_TAG_subprogram
10547 && cu
->language
== language_cplus
)
10549 struct type
*type
= read_type_die (die
, cu
);
10551 c_type_print_args (type
, &buf
, 1, cu
->language
,
10552 &type_print_raw_options
);
10554 if (cu
->language
== language_cplus
)
10556 /* Assume that an artificial first parameter is
10557 "this", but do not crash if it is not. RealView
10558 marks unnamed (and thus unused) parameters as
10559 artificial; there is no way to differentiate
10561 if (type
->num_fields () > 0
10562 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10563 && type
->field (0).type ()->code () == TYPE_CODE_PTR
10564 && TYPE_CONST (TYPE_TARGET_TYPE (type
->field (0).type ())))
10565 buf
.puts (" const");
10569 const std::string
&intermediate_name
= buf
.string ();
10571 if (cu
->language
== language_cplus
)
10573 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10576 /* If we only computed INTERMEDIATE_NAME, or if
10577 INTERMEDIATE_NAME is already canonical, then we need to
10579 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10580 name
= objfile
->intern (intermediate_name
);
10582 name
= canonical_name
;
10589 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10590 If scope qualifiers are appropriate they will be added. The result
10591 will be allocated on the storage_obstack, or NULL if the DIE does
10592 not have a name. NAME may either be from a previous call to
10593 dwarf2_name or NULL.
10595 The output string will be canonicalized (if C++). */
10597 static const char *
10598 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10600 return dwarf2_compute_name (name
, die
, cu
, 0);
10603 /* Construct a physname for the given DIE in CU. NAME may either be
10604 from a previous call to dwarf2_name or NULL. The result will be
10605 allocated on the objfile_objstack or NULL if the DIE does not have a
10608 The output string will be canonicalized (if C++). */
10610 static const char *
10611 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10613 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
10614 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10617 /* In this case dwarf2_compute_name is just a shortcut not building anything
10619 if (!die_needs_namespace (die
, cu
))
10620 return dwarf2_compute_name (name
, die
, cu
, 1);
10622 if (cu
->language
!= language_rust
)
10623 mangled
= dw2_linkage_name (die
, cu
);
10625 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
10627 gdb::unique_xmalloc_ptr
<char> demangled
;
10628 if (mangled
!= NULL
)
10631 if (language_def (cu
->language
)->store_sym_names_in_linkage_form_p ())
10633 /* Do nothing (do not demangle the symbol name). */
10637 /* Use DMGL_RET_DROP for C++ template functions to suppress
10638 their return type. It is easier for GDB users to search
10639 for such functions as `name(params)' than `long name(params)'.
10640 In such case the minimal symbol names do not match the full
10641 symbol names but for template functions there is never a need
10642 to look up their definition from their declaration so
10643 the only disadvantage remains the minimal symbol variant
10644 `long name(params)' does not have the proper inferior type. */
10645 demangled
.reset (gdb_demangle (mangled
,
10646 (DMGL_PARAMS
| DMGL_ANSI
10647 | DMGL_RET_DROP
)));
10650 canon
= demangled
.get ();
10658 if (canon
== NULL
|| check_physname
)
10660 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
10662 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
10664 /* It may not mean a bug in GDB. The compiler could also
10665 compute DW_AT_linkage_name incorrectly. But in such case
10666 GDB would need to be bug-to-bug compatible. */
10668 complaint (_("Computed physname <%s> does not match demangled <%s> "
10669 "(from linkage <%s>) - DIE at %s [in module %s]"),
10670 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
10671 objfile_name (objfile
));
10673 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
10674 is available here - over computed PHYSNAME. It is safer
10675 against both buggy GDB and buggy compilers. */
10689 retval
= objfile
->intern (retval
);
10694 /* Inspect DIE in CU for a namespace alias. If one exists, record
10695 a new symbol for it.
10697 Returns 1 if a namespace alias was recorded, 0 otherwise. */
10700 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
10702 struct attribute
*attr
;
10704 /* If the die does not have a name, this is not a namespace
10706 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
10710 struct die_info
*d
= die
;
10711 struct dwarf2_cu
*imported_cu
= cu
;
10713 /* If the compiler has nested DW_AT_imported_declaration DIEs,
10714 keep inspecting DIEs until we hit the underlying import. */
10715 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
10716 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
10718 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
10722 d
= follow_die_ref (d
, attr
, &imported_cu
);
10723 if (d
->tag
!= DW_TAG_imported_declaration
)
10727 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
10729 complaint (_("DIE at %s has too many recursively imported "
10730 "declarations"), sect_offset_str (d
->sect_off
));
10737 sect_offset sect_off
= attr
->get_ref_die_offset ();
10739 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
, cu
->per_objfile
);
10740 if (type
!= NULL
&& type
->code () == TYPE_CODE_NAMESPACE
)
10742 /* This declaration is a global namespace alias. Add
10743 a symbol for it whose type is the aliased namespace. */
10744 new_symbol (die
, type
, cu
);
10753 /* Return the using directives repository (global or local?) to use in the
10754 current context for CU.
10756 For Ada, imported declarations can materialize renamings, which *may* be
10757 global. However it is impossible (for now?) in DWARF to distinguish
10758 "external" imported declarations and "static" ones. As all imported
10759 declarations seem to be static in all other languages, make them all CU-wide
10760 global only in Ada. */
10762 static struct using_direct
**
10763 using_directives (struct dwarf2_cu
*cu
)
10765 if (cu
->language
== language_ada
10766 && cu
->get_builder ()->outermost_context_p ())
10767 return cu
->get_builder ()->get_global_using_directives ();
10769 return cu
->get_builder ()->get_local_using_directives ();
10772 /* Read the import statement specified by the given die and record it. */
10775 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
10777 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
10778 struct attribute
*import_attr
;
10779 struct die_info
*imported_die
, *child_die
;
10780 struct dwarf2_cu
*imported_cu
;
10781 const char *imported_name
;
10782 const char *imported_name_prefix
;
10783 const char *canonical_name
;
10784 const char *import_alias
;
10785 const char *imported_declaration
= NULL
;
10786 const char *import_prefix
;
10787 std::vector
<const char *> excludes
;
10789 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10790 if (import_attr
== NULL
)
10792 complaint (_("Tag '%s' has no DW_AT_import"),
10793 dwarf_tag_name (die
->tag
));
10798 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
10799 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10800 if (imported_name
== NULL
)
10802 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
10804 The import in the following code:
10818 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
10819 <52> DW_AT_decl_file : 1
10820 <53> DW_AT_decl_line : 6
10821 <54> DW_AT_import : <0x75>
10822 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
10823 <59> DW_AT_name : B
10824 <5b> DW_AT_decl_file : 1
10825 <5c> DW_AT_decl_line : 2
10826 <5d> DW_AT_type : <0x6e>
10828 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
10829 <76> DW_AT_byte_size : 4
10830 <77> DW_AT_encoding : 5 (signed)
10832 imports the wrong die ( 0x75 instead of 0x58 ).
10833 This case will be ignored until the gcc bug is fixed. */
10837 /* Figure out the local name after import. */
10838 import_alias
= dwarf2_name (die
, cu
);
10840 /* Figure out where the statement is being imported to. */
10841 import_prefix
= determine_prefix (die
, cu
);
10843 /* Figure out what the scope of the imported die is and prepend it
10844 to the name of the imported die. */
10845 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
10847 if (imported_die
->tag
!= DW_TAG_namespace
10848 && imported_die
->tag
!= DW_TAG_module
)
10850 imported_declaration
= imported_name
;
10851 canonical_name
= imported_name_prefix
;
10853 else if (strlen (imported_name_prefix
) > 0)
10854 canonical_name
= obconcat (&objfile
->objfile_obstack
,
10855 imported_name_prefix
,
10856 (cu
->language
== language_d
? "." : "::"),
10857 imported_name
, (char *) NULL
);
10859 canonical_name
= imported_name
;
10861 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
10862 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
10863 child_die
= child_die
->sibling
)
10865 /* DWARF-4: A Fortran use statement with a “rename list” may be
10866 represented by an imported module entry with an import attribute
10867 referring to the module and owned entries corresponding to those
10868 entities that are renamed as part of being imported. */
10870 if (child_die
->tag
!= DW_TAG_imported_declaration
)
10872 complaint (_("child DW_TAG_imported_declaration expected "
10873 "- DIE at %s [in module %s]"),
10874 sect_offset_str (child_die
->sect_off
),
10875 objfile_name (objfile
));
10879 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
10880 if (import_attr
== NULL
)
10882 complaint (_("Tag '%s' has no DW_AT_import"),
10883 dwarf_tag_name (child_die
->tag
));
10888 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
10890 imported_name
= dwarf2_name (imported_die
, imported_cu
);
10891 if (imported_name
== NULL
)
10893 complaint (_("child DW_TAG_imported_declaration has unknown "
10894 "imported name - DIE at %s [in module %s]"),
10895 sect_offset_str (child_die
->sect_off
),
10896 objfile_name (objfile
));
10900 excludes
.push_back (imported_name
);
10902 process_die (child_die
, cu
);
10905 add_using_directive (using_directives (cu
),
10909 imported_declaration
,
10912 &objfile
->objfile_obstack
);
10915 /* ICC<14 does not output the required DW_AT_declaration on incomplete
10916 types, but gives them a size of zero. Starting with version 14,
10917 ICC is compatible with GCC. */
10920 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
10922 if (!cu
->checked_producer
)
10923 check_producer (cu
);
10925 return cu
->producer_is_icc_lt_14
;
10928 /* ICC generates a DW_AT_type for C void functions. This was observed on
10929 ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2)
10930 which says that void functions should not have a DW_AT_type. */
10933 producer_is_icc (struct dwarf2_cu
*cu
)
10935 if (!cu
->checked_producer
)
10936 check_producer (cu
);
10938 return cu
->producer_is_icc
;
10941 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
10942 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
10943 this, it was first present in GCC release 4.3.0. */
10946 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
10948 if (!cu
->checked_producer
)
10949 check_producer (cu
);
10951 return cu
->producer_is_gcc_lt_4_3
;
10954 static file_and_directory
10955 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
10957 file_and_directory res
;
10959 /* Find the filename. Do not use dwarf2_name here, since the filename
10960 is not a source language identifier. */
10961 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
10962 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
10964 if (res
.comp_dir
== NULL
10965 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
10966 && IS_ABSOLUTE_PATH (res
.name
))
10968 res
.comp_dir_storage
= ldirname (res
.name
);
10969 if (!res
.comp_dir_storage
.empty ())
10970 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
10972 if (res
.comp_dir
!= NULL
)
10974 /* Irix 6.2 native cc prepends <machine>.: to the compilation
10975 directory, get rid of it. */
10976 const char *cp
= strchr (res
.comp_dir
, ':');
10978 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
10979 res
.comp_dir
= cp
+ 1;
10982 if (res
.name
== NULL
)
10983 res
.name
= "<unknown>";
10988 /* Handle DW_AT_stmt_list for a compilation unit.
10989 DIE is the DW_TAG_compile_unit die for CU.
10990 COMP_DIR is the compilation directory. LOWPC is passed to
10991 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
10994 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
10995 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
10997 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
10998 struct attribute
*attr
;
10999 struct line_header line_header_local
;
11000 hashval_t line_header_local_hash
;
11002 int decode_mapping
;
11004 gdb_assert (! cu
->per_cu
->is_debug_types
);
11006 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11010 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11012 /* The line header hash table is only created if needed (it exists to
11013 prevent redundant reading of the line table for partial_units).
11014 If we're given a partial_unit, we'll need it. If we're given a
11015 compile_unit, then use the line header hash table if it's already
11016 created, but don't create one just yet. */
11018 if (per_objfile
->line_header_hash
== NULL
11019 && die
->tag
== DW_TAG_partial_unit
)
11021 per_objfile
->line_header_hash
11022 .reset (htab_create_alloc (127, line_header_hash_voidp
,
11023 line_header_eq_voidp
,
11024 free_line_header_voidp
,
11028 line_header_local
.sect_off
= line_offset
;
11029 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
11030 line_header_local_hash
= line_header_hash (&line_header_local
);
11031 if (per_objfile
->line_header_hash
!= NULL
)
11033 slot
= htab_find_slot_with_hash (per_objfile
->line_header_hash
.get (),
11034 &line_header_local
,
11035 line_header_local_hash
, NO_INSERT
);
11037 /* For DW_TAG_compile_unit we need info like symtab::linetable which
11038 is not present in *SLOT (since if there is something in *SLOT then
11039 it will be for a partial_unit). */
11040 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
11042 gdb_assert (*slot
!= NULL
);
11043 cu
->line_header
= (struct line_header
*) *slot
;
11048 /* dwarf_decode_line_header does not yet provide sufficient information.
11049 We always have to call also dwarf_decode_lines for it. */
11050 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
11054 cu
->line_header
= lh
.release ();
11055 cu
->line_header_die_owner
= die
;
11057 if (per_objfile
->line_header_hash
== NULL
)
11061 slot
= htab_find_slot_with_hash (per_objfile
->line_header_hash
.get (),
11062 &line_header_local
,
11063 line_header_local_hash
, INSERT
);
11064 gdb_assert (slot
!= NULL
);
11066 if (slot
!= NULL
&& *slot
== NULL
)
11068 /* This newly decoded line number information unit will be owned
11069 by line_header_hash hash table. */
11070 *slot
= cu
->line_header
;
11071 cu
->line_header_die_owner
= NULL
;
11075 /* We cannot free any current entry in (*slot) as that struct line_header
11076 may be already used by multiple CUs. Create only temporary decoded
11077 line_header for this CU - it may happen at most once for each line
11078 number information unit. And if we're not using line_header_hash
11079 then this is what we want as well. */
11080 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
11082 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
11083 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
11088 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
11091 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11093 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
11094 struct objfile
*objfile
= per_objfile
->objfile
;
11095 struct gdbarch
*gdbarch
= objfile
->arch ();
11096 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
11097 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
11098 struct attribute
*attr
;
11099 struct die_info
*child_die
;
11100 CORE_ADDR baseaddr
;
11102 prepare_one_comp_unit (cu
, die
, cu
->language
);
11103 baseaddr
= objfile
->text_section_offset ();
11105 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
11107 /* If we didn't find a lowpc, set it to highpc to avoid complaints
11108 from finish_block. */
11109 if (lowpc
== ((CORE_ADDR
) -1))
11111 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11113 file_and_directory fnd
= find_file_and_directory (die
, cu
);
11115 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
11116 standardised yet. As a workaround for the language detection we fall
11117 back to the DW_AT_producer string. */
11118 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
11119 cu
->language
= language_opencl
;
11121 /* Similar hack for Go. */
11122 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
11123 set_cu_language (DW_LANG_Go
, cu
);
11125 cu
->start_symtab (fnd
.name
, fnd
.comp_dir
, lowpc
);
11127 /* Decode line number information if present. We do this before
11128 processing child DIEs, so that the line header table is available
11129 for DW_AT_decl_file. */
11130 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
11132 /* Process all dies in compilation unit. */
11133 if (die
->child
!= NULL
)
11135 child_die
= die
->child
;
11136 while (child_die
&& child_die
->tag
)
11138 process_die (child_die
, cu
);
11139 child_die
= child_die
->sibling
;
11143 /* Decode macro information, if present. Dwarf 2 macro information
11144 refers to information in the line number info statement program
11145 header, so we can only read it if we've read the header
11147 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11149 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11150 if (attr
&& cu
->line_header
)
11152 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11153 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11155 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
11159 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11160 if (attr
&& cu
->line_header
)
11162 unsigned int macro_offset
= DW_UNSND (attr
);
11164 dwarf_decode_macros (cu
, macro_offset
, 0);
11170 dwarf2_cu::setup_type_unit_groups (struct die_info
*die
)
11172 struct type_unit_group
*tu_group
;
11174 struct attribute
*attr
;
11176 struct signatured_type
*sig_type
;
11178 gdb_assert (per_cu
->is_debug_types
);
11179 sig_type
= (struct signatured_type
*) per_cu
;
11181 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, this);
11183 /* If we're using .gdb_index (includes -readnow) then
11184 per_cu->type_unit_group may not have been set up yet. */
11185 if (sig_type
->type_unit_group
== NULL
)
11186 sig_type
->type_unit_group
= get_type_unit_group (this, attr
);
11187 tu_group
= sig_type
->type_unit_group
;
11189 /* If we've already processed this stmt_list there's no real need to
11190 do it again, we could fake it and just recreate the part we need
11191 (file name,index -> symtab mapping). If data shows this optimization
11192 is useful we can do it then. */
11193 type_unit_group_unshareable
*tug_unshare
11194 = per_objfile
->get_type_unit_group_unshareable (tu_group
);
11195 first_time
= tug_unshare
->compunit_symtab
== NULL
;
11197 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11202 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11203 lh
= dwarf_decode_line_header (line_offset
, this);
11208 start_symtab ("", NULL
, 0);
11211 gdb_assert (tug_unshare
->symtabs
== NULL
);
11212 gdb_assert (m_builder
== nullptr);
11213 struct compunit_symtab
*cust
= tug_unshare
->compunit_symtab
;
11214 m_builder
.reset (new struct buildsym_compunit
11215 (COMPUNIT_OBJFILE (cust
), "",
11216 COMPUNIT_DIRNAME (cust
),
11217 compunit_language (cust
),
11219 list_in_scope
= get_builder ()->get_file_symbols ();
11224 line_header
= lh
.release ();
11225 line_header_die_owner
= die
;
11229 struct compunit_symtab
*cust
= start_symtab ("", NULL
, 0);
11231 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11232 still initializing it, and our caller (a few levels up)
11233 process_full_type_unit still needs to know if this is the first
11236 tug_unshare
->symtabs
11237 = XOBNEWVEC (&COMPUNIT_OBJFILE (cust
)->objfile_obstack
,
11238 struct symtab
*, line_header
->file_names_size ());
11240 auto &file_names
= line_header
->file_names ();
11241 for (i
= 0; i
< file_names
.size (); ++i
)
11243 file_entry
&fe
= file_names
[i
];
11244 dwarf2_start_subfile (this, fe
.name
,
11245 fe
.include_dir (line_header
));
11246 buildsym_compunit
*b
= get_builder ();
11247 if (b
->get_current_subfile ()->symtab
== NULL
)
11249 /* NOTE: start_subfile will recognize when it's been
11250 passed a file it has already seen. So we can't
11251 assume there's a simple mapping from
11252 cu->line_header->file_names to subfiles, plus
11253 cu->line_header->file_names may contain dups. */
11254 b
->get_current_subfile ()->symtab
11255 = allocate_symtab (cust
, b
->get_current_subfile ()->name
);
11258 fe
.symtab
= b
->get_current_subfile ()->symtab
;
11259 tug_unshare
->symtabs
[i
] = fe
.symtab
;
11264 gdb_assert (m_builder
== nullptr);
11265 struct compunit_symtab
*cust
= tug_unshare
->compunit_symtab
;
11266 m_builder
.reset (new struct buildsym_compunit
11267 (COMPUNIT_OBJFILE (cust
), "",
11268 COMPUNIT_DIRNAME (cust
),
11269 compunit_language (cust
),
11271 list_in_scope
= get_builder ()->get_file_symbols ();
11273 auto &file_names
= line_header
->file_names ();
11274 for (i
= 0; i
< file_names
.size (); ++i
)
11276 file_entry
&fe
= file_names
[i
];
11277 fe
.symtab
= tug_unshare
->symtabs
[i
];
11281 /* The main symtab is allocated last. Type units don't have DW_AT_name
11282 so they don't have a "real" (so to speak) symtab anyway.
11283 There is later code that will assign the main symtab to all symbols
11284 that don't have one. We need to handle the case of a symbol with a
11285 missing symtab (DW_AT_decl_file) anyway. */
11288 /* Process DW_TAG_type_unit.
11289 For TUs we want to skip the first top level sibling if it's not the
11290 actual type being defined by this TU. In this case the first top
11291 level sibling is there to provide context only. */
11294 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11296 struct die_info
*child_die
;
11298 prepare_one_comp_unit (cu
, die
, language_minimal
);
11300 /* Initialize (or reinitialize) the machinery for building symtabs.
11301 We do this before processing child DIEs, so that the line header table
11302 is available for DW_AT_decl_file. */
11303 cu
->setup_type_unit_groups (die
);
11305 if (die
->child
!= NULL
)
11307 child_die
= die
->child
;
11308 while (child_die
&& child_die
->tag
)
11310 process_die (child_die
, cu
);
11311 child_die
= child_die
->sibling
;
11318 http://gcc.gnu.org/wiki/DebugFission
11319 http://gcc.gnu.org/wiki/DebugFissionDWP
11321 To simplify handling of both DWO files ("object" files with the DWARF info)
11322 and DWP files (a file with the DWOs packaged up into one file), we treat
11323 DWP files as having a collection of virtual DWO files. */
11326 hash_dwo_file (const void *item
)
11328 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11331 hash
= htab_hash_string (dwo_file
->dwo_name
);
11332 if (dwo_file
->comp_dir
!= NULL
)
11333 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11338 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11340 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11341 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11343 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11345 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11346 return lhs
->comp_dir
== rhs
->comp_dir
;
11347 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11350 /* Allocate a hash table for DWO files. */
11353 allocate_dwo_file_hash_table ()
11355 auto delete_dwo_file
= [] (void *item
)
11357 struct dwo_file
*dwo_file
= (struct dwo_file
*) item
;
11362 return htab_up (htab_create_alloc (41,
11369 /* Lookup DWO file DWO_NAME. */
11372 lookup_dwo_file_slot (dwarf2_per_objfile
*per_objfile
,
11373 const char *dwo_name
,
11374 const char *comp_dir
)
11376 struct dwo_file find_entry
;
11379 if (per_objfile
->per_bfd
->dwo_files
== NULL
)
11380 per_objfile
->per_bfd
->dwo_files
= allocate_dwo_file_hash_table ();
11382 find_entry
.dwo_name
= dwo_name
;
11383 find_entry
.comp_dir
= comp_dir
;
11384 slot
= htab_find_slot (per_objfile
->per_bfd
->dwo_files
.get (), &find_entry
,
11391 hash_dwo_unit (const void *item
)
11393 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11395 /* This drops the top 32 bits of the id, but is ok for a hash. */
11396 return dwo_unit
->signature
;
11400 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11402 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11403 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11405 /* The signature is assumed to be unique within the DWO file.
11406 So while object file CU dwo_id's always have the value zero,
11407 that's OK, assuming each object file DWO file has only one CU,
11408 and that's the rule for now. */
11409 return lhs
->signature
== rhs
->signature
;
11412 /* Allocate a hash table for DWO CUs,TUs.
11413 There is one of these tables for each of CUs,TUs for each DWO file. */
11416 allocate_dwo_unit_table ()
11418 /* Start out with a pretty small number.
11419 Generally DWO files contain only one CU and maybe some TUs. */
11420 return htab_up (htab_create_alloc (3,
11423 NULL
, xcalloc
, xfree
));
11426 /* die_reader_func for create_dwo_cu. */
11429 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11430 const gdb_byte
*info_ptr
,
11431 struct die_info
*comp_unit_die
,
11432 struct dwo_file
*dwo_file
,
11433 struct dwo_unit
*dwo_unit
)
11435 struct dwarf2_cu
*cu
= reader
->cu
;
11436 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11437 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11439 gdb::optional
<ULONGEST
> signature
= lookup_dwo_id (cu
, comp_unit_die
);
11440 if (!signature
.has_value ())
11442 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11443 " its dwo_id [in module %s]"),
11444 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11448 dwo_unit
->dwo_file
= dwo_file
;
11449 dwo_unit
->signature
= *signature
;
11450 dwo_unit
->section
= section
;
11451 dwo_unit
->sect_off
= sect_off
;
11452 dwo_unit
->length
= cu
->per_cu
->length
;
11454 if (dwarf_read_debug
)
11455 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11456 sect_offset_str (sect_off
),
11457 hex_string (dwo_unit
->signature
));
11460 /* Create the dwo_units for the CUs in a DWO_FILE.
11461 Note: This function processes DWO files only, not DWP files. */
11464 create_cus_hash_table (dwarf2_per_objfile
*per_objfile
,
11465 dwarf2_cu
*cu
, struct dwo_file
&dwo_file
,
11466 dwarf2_section_info
§ion
, htab_up
&cus_htab
)
11468 struct objfile
*objfile
= per_objfile
->objfile
;
11469 dwarf2_per_bfd
*per_bfd
= per_objfile
->per_bfd
;
11470 const gdb_byte
*info_ptr
, *end_ptr
;
11472 section
.read (objfile
);
11473 info_ptr
= section
.buffer
;
11475 if (info_ptr
== NULL
)
11478 if (dwarf_read_debug
)
11480 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11481 section
.get_name (),
11482 section
.get_file_name ());
11485 end_ptr
= info_ptr
+ section
.size
;
11486 while (info_ptr
< end_ptr
)
11488 struct dwarf2_per_cu_data per_cu
;
11489 struct dwo_unit read_unit
{};
11490 struct dwo_unit
*dwo_unit
;
11492 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11494 memset (&per_cu
, 0, sizeof (per_cu
));
11495 per_cu
.per_bfd
= per_bfd
;
11496 per_cu
.is_debug_types
= 0;
11497 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11498 per_cu
.section
= §ion
;
11500 cutu_reader
reader (&per_cu
, per_objfile
, cu
, &dwo_file
);
11501 if (!reader
.dummy_p
)
11502 create_dwo_cu_reader (&reader
, reader
.info_ptr
, reader
.comp_unit_die
,
11503 &dwo_file
, &read_unit
);
11504 info_ptr
+= per_cu
.length
;
11506 // If the unit could not be parsed, skip it.
11507 if (read_unit
.dwo_file
== NULL
)
11510 if (cus_htab
== NULL
)
11511 cus_htab
= allocate_dwo_unit_table ();
11513 dwo_unit
= OBSTACK_ZALLOC (&per_bfd
->obstack
,
11515 *dwo_unit
= read_unit
;
11516 slot
= htab_find_slot (cus_htab
.get (), dwo_unit
, INSERT
);
11517 gdb_assert (slot
!= NULL
);
11520 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11521 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11523 complaint (_("debug cu entry at offset %s is duplicate to"
11524 " the entry at offset %s, signature %s"),
11525 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11526 hex_string (dwo_unit
->signature
));
11528 *slot
= (void *)dwo_unit
;
11532 /* DWP file .debug_{cu,tu}_index section format:
11533 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11534 [ref: http://dwarfstd.org/doc/DWARF5.pdf, sect 7.3.5 "DWARF Package Files"]
11536 DWP Versions 1 & 2 are older, pre-standard format versions. The first
11537 officially standard DWP format was published with DWARF v5 and is called
11538 Version 5. There are no versions 3 or 4.
11542 Both index sections have the same format, and serve to map a 64-bit
11543 signature to a set of section numbers. Each section begins with a header,
11544 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11545 indexes, and a pool of 32-bit section numbers. The index sections will be
11546 aligned at 8-byte boundaries in the file.
11548 The index section header consists of:
11550 V, 32 bit version number
11552 N, 32 bit number of compilation units or type units in the index
11553 M, 32 bit number of slots in the hash table
11555 Numbers are recorded using the byte order of the application binary.
11557 The hash table begins at offset 16 in the section, and consists of an array
11558 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11559 order of the application binary). Unused slots in the hash table are 0.
11560 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11562 The parallel table begins immediately after the hash table
11563 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11564 array of 32-bit indexes (using the byte order of the application binary),
11565 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11566 table contains a 32-bit index into the pool of section numbers. For unused
11567 hash table slots, the corresponding entry in the parallel table will be 0.
11569 The pool of section numbers begins immediately following the hash table
11570 (at offset 16 + 12 * M from the beginning of the section). The pool of
11571 section numbers consists of an array of 32-bit words (using the byte order
11572 of the application binary). Each item in the array is indexed starting
11573 from 0. The hash table entry provides the index of the first section
11574 number in the set. Additional section numbers in the set follow, and the
11575 set is terminated by a 0 entry (section number 0 is not used in ELF).
11577 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11578 section must be the first entry in the set, and the .debug_abbrev.dwo must
11579 be the second entry. Other members of the set may follow in any order.
11583 DWP Versions 2 and 5:
11585 DWP Versions 2 and 5 combine all the .debug_info, etc. sections into one,
11586 and the entries in the index tables are now offsets into these sections.
11587 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11590 Index Section Contents:
11592 Hash Table of Signatures dwp_hash_table.hash_table
11593 Parallel Table of Indices dwp_hash_table.unit_table
11594 Table of Section Offsets dwp_hash_table.{v2|v5}.{section_ids,offsets}
11595 Table of Section Sizes dwp_hash_table.{v2|v5}.sizes
11597 The index section header consists of:
11599 V, 32 bit version number
11600 L, 32 bit number of columns in the table of section offsets
11601 N, 32 bit number of compilation units or type units in the index
11602 M, 32 bit number of slots in the hash table
11604 Numbers are recorded using the byte order of the application binary.
11606 The hash table has the same format as version 1.
11607 The parallel table of indices has the same format as version 1,
11608 except that the entries are origin-1 indices into the table of sections
11609 offsets and the table of section sizes.
11611 The table of offsets begins immediately following the parallel table
11612 (at offset 16 + 12 * M from the beginning of the section). The table is
11613 a two-dimensional array of 32-bit words (using the byte order of the
11614 application binary), with L columns and N+1 rows, in row-major order.
11615 Each row in the array is indexed starting from 0. The first row provides
11616 a key to the remaining rows: each column in this row provides an identifier
11617 for a debug section, and the offsets in the same column of subsequent rows
11618 refer to that section. The section identifiers for Version 2 are:
11620 DW_SECT_INFO 1 .debug_info.dwo
11621 DW_SECT_TYPES 2 .debug_types.dwo
11622 DW_SECT_ABBREV 3 .debug_abbrev.dwo
11623 DW_SECT_LINE 4 .debug_line.dwo
11624 DW_SECT_LOC 5 .debug_loc.dwo
11625 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
11626 DW_SECT_MACINFO 7 .debug_macinfo.dwo
11627 DW_SECT_MACRO 8 .debug_macro.dwo
11629 The section identifiers for Version 5 are:
11631 DW_SECT_INFO_V5 1 .debug_info.dwo
11632 DW_SECT_RESERVED_V5 2 --
11633 DW_SECT_ABBREV_V5 3 .debug_abbrev.dwo
11634 DW_SECT_LINE_V5 4 .debug_line.dwo
11635 DW_SECT_LOCLISTS_V5 5 .debug_loclists.dwo
11636 DW_SECT_STR_OFFSETS_V5 6 .debug_str_offsets.dwo
11637 DW_SECT_MACRO_V5 7 .debug_macro.dwo
11638 DW_SECT_RNGLISTS_V5 8 .debug_rnglists.dwo
11640 The offsets provided by the CU and TU index sections are the base offsets
11641 for the contributions made by each CU or TU to the corresponding section
11642 in the package file. Each CU and TU header contains an abbrev_offset
11643 field, used to find the abbreviations table for that CU or TU within the
11644 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
11645 be interpreted as relative to the base offset given in the index section.
11646 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
11647 should be interpreted as relative to the base offset for .debug_line.dwo,
11648 and offsets into other debug sections obtained from DWARF attributes should
11649 also be interpreted as relative to the corresponding base offset.
11651 The table of sizes begins immediately following the table of offsets.
11652 Like the table of offsets, it is a two-dimensional array of 32-bit words,
11653 with L columns and N rows, in row-major order. Each row in the array is
11654 indexed starting from 1 (row 0 is shared by the two tables).
11658 Hash table lookup is handled the same in version 1 and 2:
11660 We assume that N and M will not exceed 2^32 - 1.
11661 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
11663 Given a 64-bit compilation unit signature or a type signature S, an entry
11664 in the hash table is located as follows:
11666 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
11667 the low-order k bits all set to 1.
11669 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
11671 3) If the hash table entry at index H matches the signature, use that
11672 entry. If the hash table entry at index H is unused (all zeroes),
11673 terminate the search: the signature is not present in the table.
11675 4) Let H = (H + H') modulo M. Repeat at Step 3.
11677 Because M > N and H' and M are relatively prime, the search is guaranteed
11678 to stop at an unused slot or find the match. */
11680 /* Create a hash table to map DWO IDs to their CU/TU entry in
11681 .debug_{info,types}.dwo in DWP_FILE.
11682 Returns NULL if there isn't one.
11683 Note: This function processes DWP files only, not DWO files. */
11685 static struct dwp_hash_table
*
11686 create_dwp_hash_table (dwarf2_per_objfile
*per_objfile
,
11687 struct dwp_file
*dwp_file
, int is_debug_types
)
11689 struct objfile
*objfile
= per_objfile
->objfile
;
11690 bfd
*dbfd
= dwp_file
->dbfd
.get ();
11691 const gdb_byte
*index_ptr
, *index_end
;
11692 struct dwarf2_section_info
*index
;
11693 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
11694 struct dwp_hash_table
*htab
;
11696 if (is_debug_types
)
11697 index
= &dwp_file
->sections
.tu_index
;
11699 index
= &dwp_file
->sections
.cu_index
;
11701 if (index
->empty ())
11703 index
->read (objfile
);
11705 index_ptr
= index
->buffer
;
11706 index_end
= index_ptr
+ index
->size
;
11708 /* For Version 5, the version is really 2 bytes of data & 2 bytes of padding.
11709 For now it's safe to just read 4 bytes (particularly as it's difficult to
11710 tell if you're dealing with Version 5 before you've read the version). */
11711 version
= read_4_bytes (dbfd
, index_ptr
);
11713 if (version
== 2 || version
== 5)
11714 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
11718 nr_units
= read_4_bytes (dbfd
, index_ptr
);
11720 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
11723 if (version
!= 1 && version
!= 2 && version
!= 5)
11725 error (_("Dwarf Error: unsupported DWP file version (%s)"
11726 " [in module %s]"),
11727 pulongest (version
), dwp_file
->name
);
11729 if (nr_slots
!= (nr_slots
& -nr_slots
))
11731 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
11732 " is not power of 2 [in module %s]"),
11733 pulongest (nr_slots
), dwp_file
->name
);
11736 htab
= OBSTACK_ZALLOC (&per_objfile
->per_bfd
->obstack
, struct dwp_hash_table
);
11737 htab
->version
= version
;
11738 htab
->nr_columns
= nr_columns
;
11739 htab
->nr_units
= nr_units
;
11740 htab
->nr_slots
= nr_slots
;
11741 htab
->hash_table
= index_ptr
;
11742 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
11744 /* Exit early if the table is empty. */
11745 if (nr_slots
== 0 || nr_units
== 0
11746 || (version
== 2 && nr_columns
== 0)
11747 || (version
== 5 && nr_columns
== 0))
11749 /* All must be zero. */
11750 if (nr_slots
!= 0 || nr_units
!= 0
11751 || (version
== 2 && nr_columns
!= 0)
11752 || (version
== 5 && nr_columns
!= 0))
11754 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
11755 " all zero [in modules %s]"),
11763 htab
->section_pool
.v1
.indices
=
11764 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11765 /* It's harder to decide whether the section is too small in v1.
11766 V1 is deprecated anyway so we punt. */
11768 else if (version
== 2)
11770 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11771 int *ids
= htab
->section_pool
.v2
.section_ids
;
11772 size_t sizeof_ids
= sizeof (htab
->section_pool
.v2
.section_ids
);
11773 /* Reverse map for error checking. */
11774 int ids_seen
[DW_SECT_MAX
+ 1];
11777 if (nr_columns
< 2)
11779 error (_("Dwarf Error: bad DWP hash table, too few columns"
11780 " in section table [in module %s]"),
11783 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
11785 error (_("Dwarf Error: bad DWP hash table, too many columns"
11786 " in section table [in module %s]"),
11789 memset (ids
, 255, sizeof_ids
);
11790 memset (ids_seen
, 255, sizeof (ids_seen
));
11791 for (i
= 0; i
< nr_columns
; ++i
)
11793 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
11795 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
11797 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
11798 " in section table [in module %s]"),
11799 id
, dwp_file
->name
);
11801 if (ids_seen
[id
] != -1)
11803 error (_("Dwarf Error: bad DWP hash table, duplicate section"
11804 " id %d in section table [in module %s]"),
11805 id
, dwp_file
->name
);
11810 /* Must have exactly one info or types section. */
11811 if (((ids_seen
[DW_SECT_INFO
] != -1)
11812 + (ids_seen
[DW_SECT_TYPES
] != -1))
11815 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
11816 " DWO info/types section [in module %s]"),
11819 /* Must have an abbrev section. */
11820 if (ids_seen
[DW_SECT_ABBREV
] == -1)
11822 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
11823 " section [in module %s]"),
11826 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
11827 htab
->section_pool
.v2
.sizes
=
11828 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
11829 * nr_units
* nr_columns
);
11830 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
11831 * nr_units
* nr_columns
))
11834 error (_("Dwarf Error: DWP index section is corrupt (too small)"
11835 " [in module %s]"),
11839 else /* version == 5 */
11841 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
11842 int *ids
= htab
->section_pool
.v5
.section_ids
;
11843 size_t sizeof_ids
= sizeof (htab
->section_pool
.v5
.section_ids
);
11844 /* Reverse map for error checking. */
11845 int ids_seen
[DW_SECT_MAX_V5
+ 1];
11847 if (nr_columns
< 2)
11849 error (_("Dwarf Error: bad DWP hash table, too few columns"
11850 " in section table [in module %s]"),
11853 if (nr_columns
> MAX_NR_V5_DWO_SECTIONS
)
11855 error (_("Dwarf Error: bad DWP hash table, too many columns"
11856 " in section table [in module %s]"),
11859 memset (ids
, 255, sizeof_ids
);
11860 memset (ids_seen
, 255, sizeof (ids_seen
));
11861 for (int i
= 0; i
< nr_columns
; ++i
)
11863 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
11865 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX_V5
)
11867 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
11868 " in section table [in module %s]"),
11869 id
, dwp_file
->name
);
11871 if (ids_seen
[id
] != -1)
11873 error (_("Dwarf Error: bad DWP hash table, duplicate section"
11874 " id %d in section table [in module %s]"),
11875 id
, dwp_file
->name
);
11880 /* Must have seen an info section. */
11881 if (ids_seen
[DW_SECT_INFO_V5
] == -1)
11883 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
11884 " DWO info/types section [in module %s]"),
11887 /* Must have an abbrev section. */
11888 if (ids_seen
[DW_SECT_ABBREV_V5
] == -1)
11890 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
11891 " section [in module %s]"),
11894 htab
->section_pool
.v5
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
11895 htab
->section_pool
.v5
.sizes
11896 = htab
->section_pool
.v5
.offsets
+ (sizeof (uint32_t)
11897 * nr_units
* nr_columns
);
11898 if ((htab
->section_pool
.v5
.sizes
+ (sizeof (uint32_t)
11899 * nr_units
* nr_columns
))
11902 error (_("Dwarf Error: DWP index section is corrupt (too small)"
11903 " [in module %s]"),
11911 /* Update SECTIONS with the data from SECTP.
11913 This function is like the other "locate" section routines, but in
11914 this context the sections to read comes from the DWP V1 hash table,
11915 not the full ELF section table.
11917 The result is non-zero for success, or zero if an error was found. */
11920 locate_v1_virtual_dwo_sections (asection
*sectp
,
11921 struct virtual_v1_dwo_sections
*sections
)
11923 const struct dwop_section_names
*names
= &dwop_section_names
;
11925 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
11927 /* There can be only one. */
11928 if (sections
->abbrev
.s
.section
!= NULL
)
11930 sections
->abbrev
.s
.section
= sectp
;
11931 sections
->abbrev
.size
= bfd_section_size (sectp
);
11933 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
11934 || section_is_p (sectp
->name
, &names
->types_dwo
))
11936 /* There can be only one. */
11937 if (sections
->info_or_types
.s
.section
!= NULL
)
11939 sections
->info_or_types
.s
.section
= sectp
;
11940 sections
->info_or_types
.size
= bfd_section_size (sectp
);
11942 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
11944 /* There can be only one. */
11945 if (sections
->line
.s
.section
!= NULL
)
11947 sections
->line
.s
.section
= sectp
;
11948 sections
->line
.size
= bfd_section_size (sectp
);
11950 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
11952 /* There can be only one. */
11953 if (sections
->loc
.s
.section
!= NULL
)
11955 sections
->loc
.s
.section
= sectp
;
11956 sections
->loc
.size
= bfd_section_size (sectp
);
11958 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
11960 /* There can be only one. */
11961 if (sections
->macinfo
.s
.section
!= NULL
)
11963 sections
->macinfo
.s
.section
= sectp
;
11964 sections
->macinfo
.size
= bfd_section_size (sectp
);
11966 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
11968 /* There can be only one. */
11969 if (sections
->macro
.s
.section
!= NULL
)
11971 sections
->macro
.s
.section
= sectp
;
11972 sections
->macro
.size
= bfd_section_size (sectp
);
11974 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
11976 /* There can be only one. */
11977 if (sections
->str_offsets
.s
.section
!= NULL
)
11979 sections
->str_offsets
.s
.section
= sectp
;
11980 sections
->str_offsets
.size
= bfd_section_size (sectp
);
11984 /* No other kind of section is valid. */
11991 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
11992 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
11993 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
11994 This is for DWP version 1 files. */
11996 static struct dwo_unit
*
11997 create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
*per_objfile
,
11998 struct dwp_file
*dwp_file
,
11999 uint32_t unit_index
,
12000 const char *comp_dir
,
12001 ULONGEST signature
, int is_debug_types
)
12003 const struct dwp_hash_table
*dwp_htab
=
12004 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12005 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12006 const char *kind
= is_debug_types
? "TU" : "CU";
12007 struct dwo_file
*dwo_file
;
12008 struct dwo_unit
*dwo_unit
;
12009 struct virtual_v1_dwo_sections sections
;
12010 void **dwo_file_slot
;
12013 gdb_assert (dwp_file
->version
== 1);
12015 if (dwarf_read_debug
)
12017 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
12019 pulongest (unit_index
), hex_string (signature
),
12023 /* Fetch the sections of this DWO unit.
12024 Put a limit on the number of sections we look for so that bad data
12025 doesn't cause us to loop forever. */
12027 #define MAX_NR_V1_DWO_SECTIONS \
12028 (1 /* .debug_info or .debug_types */ \
12029 + 1 /* .debug_abbrev */ \
12030 + 1 /* .debug_line */ \
12031 + 1 /* .debug_loc */ \
12032 + 1 /* .debug_str_offsets */ \
12033 + 1 /* .debug_macro or .debug_macinfo */ \
12034 + 1 /* trailing zero */)
12036 memset (§ions
, 0, sizeof (sections
));
12038 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
12041 uint32_t section_nr
=
12042 read_4_bytes (dbfd
,
12043 dwp_htab
->section_pool
.v1
.indices
12044 + (unit_index
+ i
) * sizeof (uint32_t));
12046 if (section_nr
== 0)
12048 if (section_nr
>= dwp_file
->num_sections
)
12050 error (_("Dwarf Error: bad DWP hash table, section number too large"
12051 " [in module %s]"),
12055 sectp
= dwp_file
->elf_sections
[section_nr
];
12056 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
12058 error (_("Dwarf Error: bad DWP hash table, invalid section found"
12059 " [in module %s]"),
12065 || sections
.info_or_types
.empty ()
12066 || sections
.abbrev
.empty ())
12068 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
12069 " [in module %s]"),
12072 if (i
== MAX_NR_V1_DWO_SECTIONS
)
12074 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
12075 " [in module %s]"),
12079 /* It's easier for the rest of the code if we fake a struct dwo_file and
12080 have dwo_unit "live" in that. At least for now.
12082 The DWP file can be made up of a random collection of CUs and TUs.
12083 However, for each CU + set of TUs that came from the same original DWO
12084 file, we can combine them back into a virtual DWO file to save space
12085 (fewer struct dwo_file objects to allocate). Remember that for really
12086 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12088 std::string virtual_dwo_name
=
12089 string_printf ("virtual-dwo/%d-%d-%d-%d",
12090 sections
.abbrev
.get_id (),
12091 sections
.line
.get_id (),
12092 sections
.loc
.get_id (),
12093 sections
.str_offsets
.get_id ());
12094 /* Can we use an existing virtual DWO file? */
12095 dwo_file_slot
= lookup_dwo_file_slot (per_objfile
, virtual_dwo_name
.c_str (),
12097 /* Create one if necessary. */
12098 if (*dwo_file_slot
== NULL
)
12100 if (dwarf_read_debug
)
12102 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12103 virtual_dwo_name
.c_str ());
12105 dwo_file
= new struct dwo_file
;
12106 dwo_file
->dwo_name
= per_objfile
->objfile
->intern (virtual_dwo_name
);
12107 dwo_file
->comp_dir
= comp_dir
;
12108 dwo_file
->sections
.abbrev
= sections
.abbrev
;
12109 dwo_file
->sections
.line
= sections
.line
;
12110 dwo_file
->sections
.loc
= sections
.loc
;
12111 dwo_file
->sections
.macinfo
= sections
.macinfo
;
12112 dwo_file
->sections
.macro
= sections
.macro
;
12113 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
12114 /* The "str" section is global to the entire DWP file. */
12115 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12116 /* The info or types section is assigned below to dwo_unit,
12117 there's no need to record it in dwo_file.
12118 Also, we can't simply record type sections in dwo_file because
12119 we record a pointer into the vector in dwo_unit. As we collect more
12120 types we'll grow the vector and eventually have to reallocate space
12121 for it, invalidating all copies of pointers into the previous
12123 *dwo_file_slot
= dwo_file
;
12127 if (dwarf_read_debug
)
12129 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12130 virtual_dwo_name
.c_str ());
12132 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12135 dwo_unit
= OBSTACK_ZALLOC (&per_objfile
->per_bfd
->obstack
, struct dwo_unit
);
12136 dwo_unit
->dwo_file
= dwo_file
;
12137 dwo_unit
->signature
= signature
;
12138 dwo_unit
->section
=
12139 XOBNEW (&per_objfile
->per_bfd
->obstack
, struct dwarf2_section_info
);
12140 *dwo_unit
->section
= sections
.info_or_types
;
12141 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12146 /* Subroutine of create_dwo_unit_in_dwp_v2 and create_dwo_unit_in_dwp_v5 to
12147 simplify them. Given a pointer to the containing section SECTION, and
12148 OFFSET,SIZE of the piece within that section used by a TU/CU, return a
12149 virtual section of just that piece. */
12151 static struct dwarf2_section_info
12152 create_dwp_v2_or_v5_section (dwarf2_per_objfile
*per_objfile
,
12153 struct dwarf2_section_info
*section
,
12154 bfd_size_type offset
, bfd_size_type size
)
12156 struct dwarf2_section_info result
;
12159 gdb_assert (section
!= NULL
);
12160 gdb_assert (!section
->is_virtual
);
12162 memset (&result
, 0, sizeof (result
));
12163 result
.s
.containing_section
= section
;
12164 result
.is_virtual
= true;
12169 sectp
= section
->get_bfd_section ();
12171 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
12172 bounds of the real section. This is a pretty-rare event, so just
12173 flag an error (easier) instead of a warning and trying to cope. */
12175 || offset
+ size
> bfd_section_size (sectp
))
12177 error (_("Dwarf Error: Bad DWP V2 or V5 section info, doesn't fit"
12178 " in section %s [in module %s]"),
12179 sectp
? bfd_section_name (sectp
) : "<unknown>",
12180 objfile_name (per_objfile
->objfile
));
12183 result
.virtual_offset
= offset
;
12184 result
.size
= size
;
12188 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12189 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12190 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12191 This is for DWP version 2 files. */
12193 static struct dwo_unit
*
12194 create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
*per_objfile
,
12195 struct dwp_file
*dwp_file
,
12196 uint32_t unit_index
,
12197 const char *comp_dir
,
12198 ULONGEST signature
, int is_debug_types
)
12200 const struct dwp_hash_table
*dwp_htab
=
12201 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12202 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12203 const char *kind
= is_debug_types
? "TU" : "CU";
12204 struct dwo_file
*dwo_file
;
12205 struct dwo_unit
*dwo_unit
;
12206 struct virtual_v2_or_v5_dwo_sections sections
;
12207 void **dwo_file_slot
;
12210 gdb_assert (dwp_file
->version
== 2);
12212 if (dwarf_read_debug
)
12214 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
12216 pulongest (unit_index
), hex_string (signature
),
12220 /* Fetch the section offsets of this DWO unit. */
12222 memset (§ions
, 0, sizeof (sections
));
12224 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12226 uint32_t offset
= read_4_bytes (dbfd
,
12227 dwp_htab
->section_pool
.v2
.offsets
12228 + (((unit_index
- 1) * dwp_htab
->nr_columns
12230 * sizeof (uint32_t)));
12231 uint32_t size
= read_4_bytes (dbfd
,
12232 dwp_htab
->section_pool
.v2
.sizes
12233 + (((unit_index
- 1) * dwp_htab
->nr_columns
12235 * sizeof (uint32_t)));
12237 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12240 case DW_SECT_TYPES
:
12241 sections
.info_or_types_offset
= offset
;
12242 sections
.info_or_types_size
= size
;
12244 case DW_SECT_ABBREV
:
12245 sections
.abbrev_offset
= offset
;
12246 sections
.abbrev_size
= size
;
12249 sections
.line_offset
= offset
;
12250 sections
.line_size
= size
;
12253 sections
.loc_offset
= offset
;
12254 sections
.loc_size
= size
;
12256 case DW_SECT_STR_OFFSETS
:
12257 sections
.str_offsets_offset
= offset
;
12258 sections
.str_offsets_size
= size
;
12260 case DW_SECT_MACINFO
:
12261 sections
.macinfo_offset
= offset
;
12262 sections
.macinfo_size
= size
;
12264 case DW_SECT_MACRO
:
12265 sections
.macro_offset
= offset
;
12266 sections
.macro_size
= size
;
12271 /* It's easier for the rest of the code if we fake a struct dwo_file and
12272 have dwo_unit "live" in that. At least for now.
12274 The DWP file can be made up of a random collection of CUs and TUs.
12275 However, for each CU + set of TUs that came from the same original DWO
12276 file, we can combine them back into a virtual DWO file to save space
12277 (fewer struct dwo_file objects to allocate). Remember that for really
12278 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12280 std::string virtual_dwo_name
=
12281 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12282 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12283 (long) (sections
.line_size
? sections
.line_offset
: 0),
12284 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12285 (long) (sections
.str_offsets_size
12286 ? sections
.str_offsets_offset
: 0));
12287 /* Can we use an existing virtual DWO file? */
12288 dwo_file_slot
= lookup_dwo_file_slot (per_objfile
, virtual_dwo_name
.c_str (),
12290 /* Create one if necessary. */
12291 if (*dwo_file_slot
== NULL
)
12293 if (dwarf_read_debug
)
12295 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12296 virtual_dwo_name
.c_str ());
12298 dwo_file
= new struct dwo_file
;
12299 dwo_file
->dwo_name
= per_objfile
->objfile
->intern (virtual_dwo_name
);
12300 dwo_file
->comp_dir
= comp_dir
;
12301 dwo_file
->sections
.abbrev
=
12302 create_dwp_v2_or_v5_section (per_objfile
, &dwp_file
->sections
.abbrev
,
12303 sections
.abbrev_offset
,
12304 sections
.abbrev_size
);
12305 dwo_file
->sections
.line
=
12306 create_dwp_v2_or_v5_section (per_objfile
, &dwp_file
->sections
.line
,
12307 sections
.line_offset
,
12308 sections
.line_size
);
12309 dwo_file
->sections
.loc
=
12310 create_dwp_v2_or_v5_section (per_objfile
, &dwp_file
->sections
.loc
,
12311 sections
.loc_offset
, sections
.loc_size
);
12312 dwo_file
->sections
.macinfo
=
12313 create_dwp_v2_or_v5_section (per_objfile
, &dwp_file
->sections
.macinfo
,
12314 sections
.macinfo_offset
,
12315 sections
.macinfo_size
);
12316 dwo_file
->sections
.macro
=
12317 create_dwp_v2_or_v5_section (per_objfile
, &dwp_file
->sections
.macro
,
12318 sections
.macro_offset
,
12319 sections
.macro_size
);
12320 dwo_file
->sections
.str_offsets
=
12321 create_dwp_v2_or_v5_section (per_objfile
,
12322 &dwp_file
->sections
.str_offsets
,
12323 sections
.str_offsets_offset
,
12324 sections
.str_offsets_size
);
12325 /* The "str" section is global to the entire DWP file. */
12326 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12327 /* The info or types section is assigned below to dwo_unit,
12328 there's no need to record it in dwo_file.
12329 Also, we can't simply record type sections in dwo_file because
12330 we record a pointer into the vector in dwo_unit. As we collect more
12331 types we'll grow the vector and eventually have to reallocate space
12332 for it, invalidating all copies of pointers into the previous
12334 *dwo_file_slot
= dwo_file
;
12338 if (dwarf_read_debug
)
12340 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12341 virtual_dwo_name
.c_str ());
12343 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12346 dwo_unit
= OBSTACK_ZALLOC (&per_objfile
->per_bfd
->obstack
, struct dwo_unit
);
12347 dwo_unit
->dwo_file
= dwo_file
;
12348 dwo_unit
->signature
= signature
;
12349 dwo_unit
->section
=
12350 XOBNEW (&per_objfile
->per_bfd
->obstack
, struct dwarf2_section_info
);
12351 *dwo_unit
->section
= create_dwp_v2_or_v5_section
12354 ? &dwp_file
->sections
.types
12355 : &dwp_file
->sections
.info
,
12356 sections
.info_or_types_offset
,
12357 sections
.info_or_types_size
);
12358 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12363 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12364 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12365 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12366 This is for DWP version 5 files. */
12368 static struct dwo_unit
*
12369 create_dwo_unit_in_dwp_v5 (dwarf2_per_objfile
*per_objfile
,
12370 struct dwp_file
*dwp_file
,
12371 uint32_t unit_index
,
12372 const char *comp_dir
,
12373 ULONGEST signature
, int is_debug_types
)
12375 const struct dwp_hash_table
*dwp_htab
12376 = is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12377 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12378 const char *kind
= is_debug_types
? "TU" : "CU";
12379 struct dwo_file
*dwo_file
;
12380 struct dwo_unit
*dwo_unit
;
12381 struct virtual_v2_or_v5_dwo_sections sections
{};
12382 void **dwo_file_slot
;
12384 gdb_assert (dwp_file
->version
== 5);
12386 if (dwarf_read_debug
)
12388 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V5 file: %s\n",
12390 pulongest (unit_index
), hex_string (signature
),
12394 /* Fetch the section offsets of this DWO unit. */
12396 /* memset (§ions, 0, sizeof (sections)); */
12398 for (int i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12400 uint32_t offset
= read_4_bytes (dbfd
,
12401 dwp_htab
->section_pool
.v5
.offsets
12402 + (((unit_index
- 1)
12403 * dwp_htab
->nr_columns
12405 * sizeof (uint32_t)));
12406 uint32_t size
= read_4_bytes (dbfd
,
12407 dwp_htab
->section_pool
.v5
.sizes
12408 + (((unit_index
- 1) * dwp_htab
->nr_columns
12410 * sizeof (uint32_t)));
12412 switch (dwp_htab
->section_pool
.v5
.section_ids
[i
])
12414 case DW_SECT_ABBREV_V5
:
12415 sections
.abbrev_offset
= offset
;
12416 sections
.abbrev_size
= size
;
12418 case DW_SECT_INFO_V5
:
12419 sections
.info_or_types_offset
= offset
;
12420 sections
.info_or_types_size
= size
;
12422 case DW_SECT_LINE_V5
:
12423 sections
.line_offset
= offset
;
12424 sections
.line_size
= size
;
12426 case DW_SECT_LOCLISTS_V5
:
12427 sections
.loclists_offset
= offset
;
12428 sections
.loclists_size
= size
;
12430 case DW_SECT_MACRO_V5
:
12431 sections
.macro_offset
= offset
;
12432 sections
.macro_size
= size
;
12434 case DW_SECT_RNGLISTS_V5
:
12435 sections
.rnglists_offset
= offset
;
12436 sections
.rnglists_size
= size
;
12438 case DW_SECT_STR_OFFSETS_V5
:
12439 sections
.str_offsets_offset
= offset
;
12440 sections
.str_offsets_size
= size
;
12442 case DW_SECT_RESERVED_V5
:
12448 /* It's easier for the rest of the code if we fake a struct dwo_file and
12449 have dwo_unit "live" in that. At least for now.
12451 The DWP file can be made up of a random collection of CUs and TUs.
12452 However, for each CU + set of TUs that came from the same original DWO
12453 file, we can combine them back into a virtual DWO file to save space
12454 (fewer struct dwo_file objects to allocate). Remember that for really
12455 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12457 std::string virtual_dwo_name
=
12458 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld-%ld-%ld",
12459 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12460 (long) (sections
.line_size
? sections
.line_offset
: 0),
12461 (long) (sections
.loclists_size
? sections
.loclists_offset
: 0),
12462 (long) (sections
.str_offsets_size
12463 ? sections
.str_offsets_offset
: 0),
12464 (long) (sections
.macro_size
? sections
.macro_offset
: 0),
12465 (long) (sections
.rnglists_size
? sections
.rnglists_offset
: 0));
12466 /* Can we use an existing virtual DWO file? */
12467 dwo_file_slot
= lookup_dwo_file_slot (per_objfile
,
12468 virtual_dwo_name
.c_str (),
12470 /* Create one if necessary. */
12471 if (*dwo_file_slot
== NULL
)
12473 if (dwarf_read_debug
)
12475 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12476 virtual_dwo_name
.c_str ());
12478 dwo_file
= new struct dwo_file
;
12479 dwo_file
->dwo_name
= per_objfile
->objfile
->intern (virtual_dwo_name
);
12480 dwo_file
->comp_dir
= comp_dir
;
12481 dwo_file
->sections
.abbrev
=
12482 create_dwp_v2_or_v5_section (per_objfile
,
12483 &dwp_file
->sections
.abbrev
,
12484 sections
.abbrev_offset
,
12485 sections
.abbrev_size
);
12486 dwo_file
->sections
.line
=
12487 create_dwp_v2_or_v5_section (per_objfile
,
12488 &dwp_file
->sections
.line
,
12489 sections
.line_offset
, sections
.line_size
);
12490 dwo_file
->sections
.macro
=
12491 create_dwp_v2_or_v5_section (per_objfile
,
12492 &dwp_file
->sections
.macro
,
12493 sections
.macro_offset
,
12494 sections
.macro_size
);
12495 dwo_file
->sections
.loclists
=
12496 create_dwp_v2_or_v5_section (per_objfile
,
12497 &dwp_file
->sections
.loclists
,
12498 sections
.loclists_offset
,
12499 sections
.loclists_size
);
12500 dwo_file
->sections
.rnglists
=
12501 create_dwp_v2_or_v5_section (per_objfile
,
12502 &dwp_file
->sections
.rnglists
,
12503 sections
.rnglists_offset
,
12504 sections
.rnglists_size
);
12505 dwo_file
->sections
.str_offsets
=
12506 create_dwp_v2_or_v5_section (per_objfile
,
12507 &dwp_file
->sections
.str_offsets
,
12508 sections
.str_offsets_offset
,
12509 sections
.str_offsets_size
);
12510 /* The "str" section is global to the entire DWP file. */
12511 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12512 /* The info or types section is assigned below to dwo_unit,
12513 there's no need to record it in dwo_file.
12514 Also, we can't simply record type sections in dwo_file because
12515 we record a pointer into the vector in dwo_unit. As we collect more
12516 types we'll grow the vector and eventually have to reallocate space
12517 for it, invalidating all copies of pointers into the previous
12519 *dwo_file_slot
= dwo_file
;
12523 if (dwarf_read_debug
)
12525 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12526 virtual_dwo_name
.c_str ());
12528 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12531 dwo_unit
= OBSTACK_ZALLOC (&per_objfile
->per_bfd
->obstack
, struct dwo_unit
);
12532 dwo_unit
->dwo_file
= dwo_file
;
12533 dwo_unit
->signature
= signature
;
12535 = XOBNEW (&per_objfile
->per_bfd
->obstack
, struct dwarf2_section_info
);
12536 *dwo_unit
->section
= create_dwp_v2_or_v5_section (per_objfile
,
12537 &dwp_file
->sections
.info
,
12538 sections
.info_or_types_offset
,
12539 sections
.info_or_types_size
);
12540 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12545 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12546 Returns NULL if the signature isn't found. */
12548 static struct dwo_unit
*
12549 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
*per_objfile
,
12550 struct dwp_file
*dwp_file
, const char *comp_dir
,
12551 ULONGEST signature
, int is_debug_types
)
12553 const struct dwp_hash_table
*dwp_htab
=
12554 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12555 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12556 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12557 uint32_t hash
= signature
& mask
;
12558 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12561 struct dwo_unit find_dwo_cu
;
12563 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12564 find_dwo_cu
.signature
= signature
;
12565 slot
= htab_find_slot (is_debug_types
12566 ? dwp_file
->loaded_tus
.get ()
12567 : dwp_file
->loaded_cus
.get (),
12568 &find_dwo_cu
, INSERT
);
12571 return (struct dwo_unit
*) *slot
;
12573 /* Use a for loop so that we don't loop forever on bad debug info. */
12574 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12576 ULONGEST signature_in_table
;
12578 signature_in_table
=
12579 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12580 if (signature_in_table
== signature
)
12582 uint32_t unit_index
=
12583 read_4_bytes (dbfd
,
12584 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12586 if (dwp_file
->version
== 1)
12588 *slot
= create_dwo_unit_in_dwp_v1 (per_objfile
, dwp_file
,
12589 unit_index
, comp_dir
,
12590 signature
, is_debug_types
);
12592 else if (dwp_file
->version
== 2)
12594 *slot
= create_dwo_unit_in_dwp_v2 (per_objfile
, dwp_file
,
12595 unit_index
, comp_dir
,
12596 signature
, is_debug_types
);
12598 else /* version == 5 */
12600 *slot
= create_dwo_unit_in_dwp_v5 (per_objfile
, dwp_file
,
12601 unit_index
, comp_dir
,
12602 signature
, is_debug_types
);
12604 return (struct dwo_unit
*) *slot
;
12606 if (signature_in_table
== 0)
12608 hash
= (hash
+ hash2
) & mask
;
12611 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12612 " [in module %s]"),
12616 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12617 Open the file specified by FILE_NAME and hand it off to BFD for
12618 preliminary analysis. Return a newly initialized bfd *, which
12619 includes a canonicalized copy of FILE_NAME.
12620 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12621 SEARCH_CWD is true if the current directory is to be searched.
12622 It will be searched before debug-file-directory.
12623 If successful, the file is added to the bfd include table of the
12624 objfile's bfd (see gdb_bfd_record_inclusion).
12625 If unable to find/open the file, return NULL.
12626 NOTE: This function is derived from symfile_bfd_open. */
12628 static gdb_bfd_ref_ptr
12629 try_open_dwop_file (dwarf2_per_objfile
*per_objfile
,
12630 const char *file_name
, int is_dwp
, int search_cwd
)
12633 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12634 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12635 to debug_file_directory. */
12636 const char *search_path
;
12637 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12639 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12642 if (*debug_file_directory
!= '\0')
12644 search_path_holder
.reset (concat (".", dirname_separator_string
,
12645 debug_file_directory
,
12647 search_path
= search_path_holder
.get ();
12653 search_path
= debug_file_directory
;
12655 openp_flags flags
= OPF_RETURN_REALPATH
;
12657 flags
|= OPF_SEARCH_IN_PATH
;
12659 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12660 desc
= openp (search_path
, flags
, file_name
,
12661 O_RDONLY
| O_BINARY
, &absolute_name
);
12665 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12667 if (sym_bfd
== NULL
)
12669 bfd_set_cacheable (sym_bfd
.get (), 1);
12671 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12674 /* Success. Record the bfd as having been included by the objfile's bfd.
12675 This is important because things like demangled_names_hash lives in the
12676 objfile's per_bfd space and may have references to things like symbol
12677 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12678 gdb_bfd_record_inclusion (per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12683 /* Try to open DWO file FILE_NAME.
12684 COMP_DIR is the DW_AT_comp_dir attribute.
12685 The result is the bfd handle of the file.
12686 If there is a problem finding or opening the file, return NULL.
12687 Upon success, the canonicalized path of the file is stored in the bfd,
12688 same as symfile_bfd_open. */
12690 static gdb_bfd_ref_ptr
12691 open_dwo_file (dwarf2_per_objfile
*per_objfile
,
12692 const char *file_name
, const char *comp_dir
)
12694 if (IS_ABSOLUTE_PATH (file_name
))
12695 return try_open_dwop_file (per_objfile
, file_name
,
12696 0 /*is_dwp*/, 0 /*search_cwd*/);
12698 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12700 if (comp_dir
!= NULL
)
12702 gdb::unique_xmalloc_ptr
<char> path_to_try
12703 (concat (comp_dir
, SLASH_STRING
, file_name
, (char *) NULL
));
12705 /* NOTE: If comp_dir is a relative path, this will also try the
12706 search path, which seems useful. */
12707 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (per_objfile
, path_to_try
.get (),
12709 1 /*search_cwd*/));
12714 /* That didn't work, try debug-file-directory, which, despite its name,
12715 is a list of paths. */
12717 if (*debug_file_directory
== '\0')
12720 return try_open_dwop_file (per_objfile
, file_name
,
12721 0 /*is_dwp*/, 1 /*search_cwd*/);
12724 /* This function is mapped across the sections and remembers the offset and
12725 size of each of the DWO debugging sections we are interested in. */
12728 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
,
12729 dwo_sections
*dwo_sections
)
12731 const struct dwop_section_names
*names
= &dwop_section_names
;
12733 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12735 dwo_sections
->abbrev
.s
.section
= sectp
;
12736 dwo_sections
->abbrev
.size
= bfd_section_size (sectp
);
12738 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12740 dwo_sections
->info
.s
.section
= sectp
;
12741 dwo_sections
->info
.size
= bfd_section_size (sectp
);
12743 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12745 dwo_sections
->line
.s
.section
= sectp
;
12746 dwo_sections
->line
.size
= bfd_section_size (sectp
);
12748 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12750 dwo_sections
->loc
.s
.section
= sectp
;
12751 dwo_sections
->loc
.size
= bfd_section_size (sectp
);
12753 else if (section_is_p (sectp
->name
, &names
->loclists_dwo
))
12755 dwo_sections
->loclists
.s
.section
= sectp
;
12756 dwo_sections
->loclists
.size
= bfd_section_size (sectp
);
12758 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12760 dwo_sections
->macinfo
.s
.section
= sectp
;
12761 dwo_sections
->macinfo
.size
= bfd_section_size (sectp
);
12763 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12765 dwo_sections
->macro
.s
.section
= sectp
;
12766 dwo_sections
->macro
.size
= bfd_section_size (sectp
);
12768 else if (section_is_p (sectp
->name
, &names
->rnglists_dwo
))
12770 dwo_sections
->rnglists
.s
.section
= sectp
;
12771 dwo_sections
->rnglists
.size
= bfd_section_size (sectp
);
12773 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12775 dwo_sections
->str
.s
.section
= sectp
;
12776 dwo_sections
->str
.size
= bfd_section_size (sectp
);
12778 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12780 dwo_sections
->str_offsets
.s
.section
= sectp
;
12781 dwo_sections
->str_offsets
.size
= bfd_section_size (sectp
);
12783 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12785 struct dwarf2_section_info type_section
;
12787 memset (&type_section
, 0, sizeof (type_section
));
12788 type_section
.s
.section
= sectp
;
12789 type_section
.size
= bfd_section_size (sectp
);
12790 dwo_sections
->types
.push_back (type_section
);
12794 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12795 by PER_CU. This is for the non-DWP case.
12796 The result is NULL if DWO_NAME can't be found. */
12798 static struct dwo_file
*
12799 open_and_init_dwo_file (dwarf2_cu
*cu
, const char *dwo_name
,
12800 const char *comp_dir
)
12802 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
12804 gdb_bfd_ref_ptr dbfd
= open_dwo_file (per_objfile
, dwo_name
, comp_dir
);
12807 if (dwarf_read_debug
)
12808 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12812 dwo_file_up
dwo_file (new struct dwo_file
);
12813 dwo_file
->dwo_name
= dwo_name
;
12814 dwo_file
->comp_dir
= comp_dir
;
12815 dwo_file
->dbfd
= std::move (dbfd
);
12817 for (asection
*sec
: gdb_bfd_sections (dwo_file
->dbfd
))
12818 dwarf2_locate_dwo_sections (dwo_file
->dbfd
.get (), sec
,
12819 &dwo_file
->sections
);
12821 create_cus_hash_table (per_objfile
, cu
, *dwo_file
, dwo_file
->sections
.info
,
12824 if (cu
->per_cu
->dwarf_version
< 5)
12826 create_debug_types_hash_table (per_objfile
, dwo_file
.get (),
12827 dwo_file
->sections
.types
, dwo_file
->tus
);
12831 create_debug_type_hash_table (per_objfile
, dwo_file
.get (),
12832 &dwo_file
->sections
.info
, dwo_file
->tus
,
12836 if (dwarf_read_debug
)
12837 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
12839 return dwo_file
.release ();
12842 /* This function is mapped across the sections and remembers the offset and
12843 size of each of the DWP debugging sections common to version 1 and 2 that
12844 we are interested in. */
12847 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12848 dwp_file
*dwp_file
)
12850 const struct dwop_section_names
*names
= &dwop_section_names
;
12851 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12853 /* Record the ELF section number for later lookup: this is what the
12854 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12855 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12856 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12858 /* Look for specific sections that we need. */
12859 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12861 dwp_file
->sections
.str
.s
.section
= sectp
;
12862 dwp_file
->sections
.str
.size
= bfd_section_size (sectp
);
12864 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12866 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12867 dwp_file
->sections
.cu_index
.size
= bfd_section_size (sectp
);
12869 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12871 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12872 dwp_file
->sections
.tu_index
.size
= bfd_section_size (sectp
);
12876 /* This function is mapped across the sections and remembers the offset and
12877 size of each of the DWP version 2 debugging sections that we are interested
12878 in. This is split into a separate function because we don't know if we
12879 have version 1 or 2 or 5 until we parse the cu_index/tu_index sections. */
12882 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12884 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12885 const struct dwop_section_names
*names
= &dwop_section_names
;
12886 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12888 /* Record the ELF section number for later lookup: this is what the
12889 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12890 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12891 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12893 /* Look for specific sections that we need. */
12894 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12896 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12897 dwp_file
->sections
.abbrev
.size
= bfd_section_size (sectp
);
12899 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12901 dwp_file
->sections
.info
.s
.section
= sectp
;
12902 dwp_file
->sections
.info
.size
= bfd_section_size (sectp
);
12904 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12906 dwp_file
->sections
.line
.s
.section
= sectp
;
12907 dwp_file
->sections
.line
.size
= bfd_section_size (sectp
);
12909 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12911 dwp_file
->sections
.loc
.s
.section
= sectp
;
12912 dwp_file
->sections
.loc
.size
= bfd_section_size (sectp
);
12914 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12916 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
12917 dwp_file
->sections
.macinfo
.size
= bfd_section_size (sectp
);
12919 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12921 dwp_file
->sections
.macro
.s
.section
= sectp
;
12922 dwp_file
->sections
.macro
.size
= bfd_section_size (sectp
);
12924 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12926 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
12927 dwp_file
->sections
.str_offsets
.size
= bfd_section_size (sectp
);
12929 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12931 dwp_file
->sections
.types
.s
.section
= sectp
;
12932 dwp_file
->sections
.types
.size
= bfd_section_size (sectp
);
12936 /* This function is mapped across the sections and remembers the offset and
12937 size of each of the DWP version 5 debugging sections that we are interested
12938 in. This is split into a separate function because we don't know if we
12939 have version 1 or 2 or 5 until we parse the cu_index/tu_index sections. */
12942 dwarf2_locate_v5_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12944 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12945 const struct dwop_section_names
*names
= &dwop_section_names
;
12946 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12948 /* Record the ELF section number for later lookup: this is what the
12949 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12950 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12951 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12953 /* Look for specific sections that we need. */
12954 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12956 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12957 dwp_file
->sections
.abbrev
.size
= bfd_section_size (sectp
);
12959 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12961 dwp_file
->sections
.info
.s
.section
= sectp
;
12962 dwp_file
->sections
.info
.size
= bfd_section_size (sectp
);
12964 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12966 dwp_file
->sections
.line
.s
.section
= sectp
;
12967 dwp_file
->sections
.line
.size
= bfd_section_size (sectp
);
12969 else if (section_is_p (sectp
->name
, &names
->loclists_dwo
))
12971 dwp_file
->sections
.loclists
.s
.section
= sectp
;
12972 dwp_file
->sections
.loclists
.size
= bfd_section_size (sectp
);
12974 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12976 dwp_file
->sections
.macro
.s
.section
= sectp
;
12977 dwp_file
->sections
.macro
.size
= bfd_section_size (sectp
);
12979 else if (section_is_p (sectp
->name
, &names
->rnglists_dwo
))
12981 dwp_file
->sections
.rnglists
.s
.section
= sectp
;
12982 dwp_file
->sections
.rnglists
.size
= bfd_section_size (sectp
);
12984 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12986 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
12987 dwp_file
->sections
.str_offsets
.size
= bfd_section_size (sectp
);
12991 /* Hash function for dwp_file loaded CUs/TUs. */
12994 hash_dwp_loaded_cutus (const void *item
)
12996 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
12998 /* This drops the top 32 bits of the signature, but is ok for a hash. */
12999 return dwo_unit
->signature
;
13002 /* Equality function for dwp_file loaded CUs/TUs. */
13005 eq_dwp_loaded_cutus (const void *a
, const void *b
)
13007 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
13008 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
13010 return dua
->signature
== dub
->signature
;
13013 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
13016 allocate_dwp_loaded_cutus_table ()
13018 return htab_up (htab_create_alloc (3,
13019 hash_dwp_loaded_cutus
,
13020 eq_dwp_loaded_cutus
,
13021 NULL
, xcalloc
, xfree
));
13024 /* Try to open DWP file FILE_NAME.
13025 The result is the bfd handle of the file.
13026 If there is a problem finding or opening the file, return NULL.
13027 Upon success, the canonicalized path of the file is stored in the bfd,
13028 same as symfile_bfd_open. */
13030 static gdb_bfd_ref_ptr
13031 open_dwp_file (dwarf2_per_objfile
*per_objfile
, const char *file_name
)
13033 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (per_objfile
, file_name
,
13035 1 /*search_cwd*/));
13039 /* Work around upstream bug 15652.
13040 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
13041 [Whether that's a "bug" is debatable, but it is getting in our way.]
13042 We have no real idea where the dwp file is, because gdb's realpath-ing
13043 of the executable's path may have discarded the needed info.
13044 [IWBN if the dwp file name was recorded in the executable, akin to
13045 .gnu_debuglink, but that doesn't exist yet.]
13046 Strip the directory from FILE_NAME and search again. */
13047 if (*debug_file_directory
!= '\0')
13049 /* Don't implicitly search the current directory here.
13050 If the user wants to search "." to handle this case,
13051 it must be added to debug-file-directory. */
13052 return try_open_dwop_file (per_objfile
, lbasename (file_name
),
13060 /* Initialize the use of the DWP file for the current objfile.
13061 By convention the name of the DWP file is ${objfile}.dwp.
13062 The result is NULL if it can't be found. */
13064 static std::unique_ptr
<struct dwp_file
>
13065 open_and_init_dwp_file (dwarf2_per_objfile
*per_objfile
)
13067 struct objfile
*objfile
= per_objfile
->objfile
;
13069 /* Try to find first .dwp for the binary file before any symbolic links
13072 /* If the objfile is a debug file, find the name of the real binary
13073 file and get the name of dwp file from there. */
13074 std::string dwp_name
;
13075 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
13077 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
13078 const char *backlink_basename
= lbasename (backlink
->original_name
);
13080 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
13083 dwp_name
= objfile
->original_name
;
13085 dwp_name
+= ".dwp";
13087 gdb_bfd_ref_ptr
dbfd (open_dwp_file (per_objfile
, dwp_name
.c_str ()));
13089 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
13091 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
13092 dwp_name
= objfile_name (objfile
);
13093 dwp_name
+= ".dwp";
13094 dbfd
= open_dwp_file (per_objfile
, dwp_name
.c_str ());
13099 if (dwarf_read_debug
)
13100 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
13101 return std::unique_ptr
<dwp_file
> ();
13104 const char *name
= bfd_get_filename (dbfd
.get ());
13105 std::unique_ptr
<struct dwp_file
> dwp_file
13106 (new struct dwp_file (name
, std::move (dbfd
)));
13108 dwp_file
->num_sections
= elf_numsections (dwp_file
->dbfd
);
13109 dwp_file
->elf_sections
=
13110 OBSTACK_CALLOC (&per_objfile
->per_bfd
->obstack
,
13111 dwp_file
->num_sections
, asection
*);
13113 for (asection
*sec
: gdb_bfd_sections (dwp_file
->dbfd
))
13114 dwarf2_locate_common_dwp_sections (dwp_file
->dbfd
.get (), sec
,
13117 dwp_file
->cus
= create_dwp_hash_table (per_objfile
, dwp_file
.get (), 0);
13119 dwp_file
->tus
= create_dwp_hash_table (per_objfile
, dwp_file
.get (), 1);
13121 /* The DWP file version is stored in the hash table. Oh well. */
13122 if (dwp_file
->cus
&& dwp_file
->tus
13123 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
13125 /* Technically speaking, we should try to limp along, but this is
13126 pretty bizarre. We use pulongest here because that's the established
13127 portability solution (e.g, we cannot use %u for uint32_t). */
13128 error (_("Dwarf Error: DWP file CU version %s doesn't match"
13129 " TU version %s [in DWP file %s]"),
13130 pulongest (dwp_file
->cus
->version
),
13131 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
13135 dwp_file
->version
= dwp_file
->cus
->version
;
13136 else if (dwp_file
->tus
)
13137 dwp_file
->version
= dwp_file
->tus
->version
;
13139 dwp_file
->version
= 2;
13141 for (asection
*sec
: gdb_bfd_sections (dwp_file
->dbfd
))
13143 if (dwp_file
->version
== 2)
13144 dwarf2_locate_v2_dwp_sections (dwp_file
->dbfd
.get (), sec
,
13147 dwarf2_locate_v5_dwp_sections (dwp_file
->dbfd
.get (), sec
,
13151 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table ();
13152 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table ();
13154 if (dwarf_read_debug
)
13156 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
13157 fprintf_unfiltered (gdb_stdlog
,
13158 " %s CUs, %s TUs\n",
13159 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
13160 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
13166 /* Wrapper around open_and_init_dwp_file, only open it once. */
13168 static struct dwp_file
*
13169 get_dwp_file (dwarf2_per_objfile
*per_objfile
)
13171 if (!per_objfile
->per_bfd
->dwp_checked
)
13173 per_objfile
->per_bfd
->dwp_file
= open_and_init_dwp_file (per_objfile
);
13174 per_objfile
->per_bfd
->dwp_checked
= 1;
13176 return per_objfile
->per_bfd
->dwp_file
.get ();
13179 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
13180 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
13181 or in the DWP file for the objfile, referenced by THIS_UNIT.
13182 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
13183 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
13185 This is called, for example, when wanting to read a variable with a
13186 complex location. Therefore we don't want to do file i/o for every call.
13187 Therefore we don't want to look for a DWO file on every call.
13188 Therefore we first see if we've already seen SIGNATURE in a DWP file,
13189 then we check if we've already seen DWO_NAME, and only THEN do we check
13192 The result is a pointer to the dwo_unit object or NULL if we didn't find it
13193 (dwo_id mismatch or couldn't find the DWO/DWP file). */
13195 static struct dwo_unit
*
13196 lookup_dwo_cutu (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
,
13197 ULONGEST signature
, int is_debug_types
)
13199 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
13200 struct objfile
*objfile
= per_objfile
->objfile
;
13201 const char *kind
= is_debug_types
? "TU" : "CU";
13202 void **dwo_file_slot
;
13203 struct dwo_file
*dwo_file
;
13204 struct dwp_file
*dwp_file
;
13206 /* First see if there's a DWP file.
13207 If we have a DWP file but didn't find the DWO inside it, don't
13208 look for the original DWO file. It makes gdb behave differently
13209 depending on whether one is debugging in the build tree. */
13211 dwp_file
= get_dwp_file (per_objfile
);
13212 if (dwp_file
!= NULL
)
13214 const struct dwp_hash_table
*dwp_htab
=
13215 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
13217 if (dwp_htab
!= NULL
)
13219 struct dwo_unit
*dwo_cutu
=
13220 lookup_dwo_unit_in_dwp (per_objfile
, dwp_file
, comp_dir
, signature
,
13223 if (dwo_cutu
!= NULL
)
13225 if (dwarf_read_debug
)
13227 fprintf_unfiltered (gdb_stdlog
,
13228 "Virtual DWO %s %s found: @%s\n",
13229 kind
, hex_string (signature
),
13230 host_address_to_string (dwo_cutu
));
13238 /* No DWP file, look for the DWO file. */
13240 dwo_file_slot
= lookup_dwo_file_slot (per_objfile
, dwo_name
, comp_dir
);
13241 if (*dwo_file_slot
== NULL
)
13243 /* Read in the file and build a table of the CUs/TUs it contains. */
13244 *dwo_file_slot
= open_and_init_dwo_file (cu
, dwo_name
, comp_dir
);
13246 /* NOTE: This will be NULL if unable to open the file. */
13247 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
13249 if (dwo_file
!= NULL
)
13251 struct dwo_unit
*dwo_cutu
= NULL
;
13253 if (is_debug_types
&& dwo_file
->tus
)
13255 struct dwo_unit find_dwo_cutu
;
13257 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13258 find_dwo_cutu
.signature
= signature
;
13260 = (struct dwo_unit
*) htab_find (dwo_file
->tus
.get (),
13263 else if (!is_debug_types
&& dwo_file
->cus
)
13265 struct dwo_unit find_dwo_cutu
;
13267 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13268 find_dwo_cutu
.signature
= signature
;
13269 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
.get (),
13273 if (dwo_cutu
!= NULL
)
13275 if (dwarf_read_debug
)
13277 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
13278 kind
, dwo_name
, hex_string (signature
),
13279 host_address_to_string (dwo_cutu
));
13286 /* We didn't find it. This could mean a dwo_id mismatch, or
13287 someone deleted the DWO/DWP file, or the search path isn't set up
13288 correctly to find the file. */
13290 if (dwarf_read_debug
)
13292 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
13293 kind
, dwo_name
, hex_string (signature
));
13296 /* This is a warning and not a complaint because it can be caused by
13297 pilot error (e.g., user accidentally deleting the DWO). */
13299 /* Print the name of the DWP file if we looked there, helps the user
13300 better diagnose the problem. */
13301 std::string dwp_text
;
13303 if (dwp_file
!= NULL
)
13304 dwp_text
= string_printf (" [in DWP file %s]",
13305 lbasename (dwp_file
->name
));
13307 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
13308 " [in module %s]"),
13309 kind
, dwo_name
, hex_string (signature
), dwp_text
.c_str (), kind
,
13310 sect_offset_str (cu
->per_cu
->sect_off
), objfile_name (objfile
));
13315 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
13316 See lookup_dwo_cutu_unit for details. */
13318 static struct dwo_unit
*
13319 lookup_dwo_comp_unit (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
,
13320 ULONGEST signature
)
13322 gdb_assert (!cu
->per_cu
->is_debug_types
);
13324 return lookup_dwo_cutu (cu
, dwo_name
, comp_dir
, signature
, 0);
13327 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
13328 See lookup_dwo_cutu_unit for details. */
13330 static struct dwo_unit
*
13331 lookup_dwo_type_unit (dwarf2_cu
*cu
, const char *dwo_name
, const char *comp_dir
)
13333 gdb_assert (cu
->per_cu
->is_debug_types
);
13335 signatured_type
*sig_type
= (signatured_type
*) cu
->per_cu
;
13337 return lookup_dwo_cutu (cu
, dwo_name
, comp_dir
, sig_type
->signature
, 1);
13340 /* Traversal function for queue_and_load_all_dwo_tus. */
13343 queue_and_load_dwo_tu (void **slot
, void *info
)
13345 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
13346 dwarf2_cu
*cu
= (dwarf2_cu
*) info
;
13347 ULONGEST signature
= dwo_unit
->signature
;
13348 signatured_type
*sig_type
= lookup_dwo_signatured_type (cu
, signature
);
13350 if (sig_type
!= NULL
)
13352 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
13354 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
13355 a real dependency of PER_CU on SIG_TYPE. That is detected later
13356 while processing PER_CU. */
13357 if (maybe_queue_comp_unit (NULL
, sig_cu
, cu
->per_objfile
, cu
->language
))
13358 load_full_type_unit (sig_cu
, cu
->per_objfile
);
13359 cu
->per_cu
->imported_symtabs_push (sig_cu
);
13365 /* Queue all TUs contained in the DWO of CU to be read in.
13366 The DWO may have the only definition of the type, though it may not be
13367 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
13368 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
13371 queue_and_load_all_dwo_tus (dwarf2_cu
*cu
)
13373 struct dwo_unit
*dwo_unit
;
13374 struct dwo_file
*dwo_file
;
13376 gdb_assert (cu
!= nullptr);
13377 gdb_assert (!cu
->per_cu
->is_debug_types
);
13378 gdb_assert (get_dwp_file (cu
->per_objfile
) == nullptr);
13380 dwo_unit
= cu
->dwo_unit
;
13381 gdb_assert (dwo_unit
!= NULL
);
13383 dwo_file
= dwo_unit
->dwo_file
;
13384 if (dwo_file
->tus
!= NULL
)
13385 htab_traverse_noresize (dwo_file
->tus
.get (), queue_and_load_dwo_tu
, cu
);
13388 /* Read in various DIEs. */
13390 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
13391 Inherit only the children of the DW_AT_abstract_origin DIE not being
13392 already referenced by DW_AT_abstract_origin from the children of the
13396 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
13398 struct die_info
*child_die
;
13399 sect_offset
*offsetp
;
13400 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
13401 struct die_info
*origin_die
;
13402 /* Iterator of the ORIGIN_DIE children. */
13403 struct die_info
*origin_child_die
;
13404 struct attribute
*attr
;
13405 struct dwarf2_cu
*origin_cu
;
13406 struct pending
**origin_previous_list_in_scope
;
13408 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13412 /* Note that following die references may follow to a die in a
13416 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
13418 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
13420 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
13421 origin_cu
->list_in_scope
= cu
->list_in_scope
;
13423 if (die
->tag
!= origin_die
->tag
13424 && !(die
->tag
== DW_TAG_inlined_subroutine
13425 && origin_die
->tag
== DW_TAG_subprogram
))
13426 complaint (_("DIE %s and its abstract origin %s have different tags"),
13427 sect_offset_str (die
->sect_off
),
13428 sect_offset_str (origin_die
->sect_off
));
13430 std::vector
<sect_offset
> offsets
;
13432 for (child_die
= die
->child
;
13433 child_die
&& child_die
->tag
;
13434 child_die
= child_die
->sibling
)
13436 struct die_info
*child_origin_die
;
13437 struct dwarf2_cu
*child_origin_cu
;
13439 /* We are trying to process concrete instance entries:
13440 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
13441 it's not relevant to our analysis here. i.e. detecting DIEs that are
13442 present in the abstract instance but not referenced in the concrete
13444 if (child_die
->tag
== DW_TAG_call_site
13445 || child_die
->tag
== DW_TAG_GNU_call_site
)
13448 /* For each CHILD_DIE, find the corresponding child of
13449 ORIGIN_DIE. If there is more than one layer of
13450 DW_AT_abstract_origin, follow them all; there shouldn't be,
13451 but GCC versions at least through 4.4 generate this (GCC PR
13453 child_origin_die
= child_die
;
13454 child_origin_cu
= cu
;
13457 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
13461 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
13465 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
13466 counterpart may exist. */
13467 if (child_origin_die
!= child_die
)
13469 if (child_die
->tag
!= child_origin_die
->tag
13470 && !(child_die
->tag
== DW_TAG_inlined_subroutine
13471 && child_origin_die
->tag
== DW_TAG_subprogram
))
13472 complaint (_("Child DIE %s and its abstract origin %s have "
13474 sect_offset_str (child_die
->sect_off
),
13475 sect_offset_str (child_origin_die
->sect_off
));
13476 if (child_origin_die
->parent
!= origin_die
)
13477 complaint (_("Child DIE %s and its abstract origin %s have "
13478 "different parents"),
13479 sect_offset_str (child_die
->sect_off
),
13480 sect_offset_str (child_origin_die
->sect_off
));
13482 offsets
.push_back (child_origin_die
->sect_off
);
13485 std::sort (offsets
.begin (), offsets
.end ());
13486 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
13487 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
13488 if (offsetp
[-1] == *offsetp
)
13489 complaint (_("Multiple children of DIE %s refer "
13490 "to DIE %s as their abstract origin"),
13491 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
13493 offsetp
= offsets
.data ();
13494 origin_child_die
= origin_die
->child
;
13495 while (origin_child_die
&& origin_child_die
->tag
)
13497 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13498 while (offsetp
< offsets_end
13499 && *offsetp
< origin_child_die
->sect_off
)
13501 if (offsetp
>= offsets_end
13502 || *offsetp
> origin_child_die
->sect_off
)
13504 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13505 Check whether we're already processing ORIGIN_CHILD_DIE.
13506 This can happen with mutually referenced abstract_origins.
13508 if (!origin_child_die
->in_process
)
13509 process_die (origin_child_die
, origin_cu
);
13511 origin_child_die
= origin_child_die
->sibling
;
13513 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13515 if (cu
!= origin_cu
)
13516 compute_delayed_physnames (origin_cu
);
13520 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13522 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
13523 struct gdbarch
*gdbarch
= objfile
->arch ();
13524 struct context_stack
*newobj
;
13527 struct die_info
*child_die
;
13528 struct attribute
*attr
, *call_line
, *call_file
;
13530 CORE_ADDR baseaddr
;
13531 struct block
*block
;
13532 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13533 std::vector
<struct symbol
*> template_args
;
13534 struct template_symbol
*templ_func
= NULL
;
13538 /* If we do not have call site information, we can't show the
13539 caller of this inlined function. That's too confusing, so
13540 only use the scope for local variables. */
13541 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13542 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13543 if (call_line
== NULL
|| call_file
== NULL
)
13545 read_lexical_block_scope (die
, cu
);
13550 baseaddr
= objfile
->text_section_offset ();
13552 name
= dwarf2_name (die
, cu
);
13554 /* Ignore functions with missing or empty names. These are actually
13555 illegal according to the DWARF standard. */
13558 complaint (_("missing name for subprogram DIE at %s"),
13559 sect_offset_str (die
->sect_off
));
13563 /* Ignore functions with missing or invalid low and high pc attributes. */
13564 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13565 <= PC_BOUNDS_INVALID
)
13567 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13568 if (!attr
|| !DW_UNSND (attr
))
13569 complaint (_("cannot get low and high bounds "
13570 "for subprogram DIE at %s"),
13571 sect_offset_str (die
->sect_off
));
13575 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13576 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13578 /* If we have any template arguments, then we must allocate a
13579 different sort of symbol. */
13580 for (child_die
= die
->child
; child_die
; child_die
= child_die
->sibling
)
13582 if (child_die
->tag
== DW_TAG_template_type_param
13583 || child_die
->tag
== DW_TAG_template_value_param
)
13585 templ_func
= new (&objfile
->objfile_obstack
) template_symbol
;
13586 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13591 newobj
= cu
->get_builder ()->push_context (0, lowpc
);
13592 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13593 (struct symbol
*) templ_func
);
13595 if (dwarf2_flag_true_p (die
, DW_AT_main_subprogram
, cu
))
13596 set_objfile_main_name (objfile
, newobj
->name
->linkage_name (),
13599 /* If there is a location expression for DW_AT_frame_base, record
13601 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13602 if (attr
!= nullptr)
13603 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13605 /* If there is a location for the static link, record it. */
13606 newobj
->static_link
= NULL
;
13607 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13608 if (attr
!= nullptr)
13610 newobj
->static_link
13611 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13612 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
,
13616 cu
->list_in_scope
= cu
->get_builder ()->get_local_symbols ();
13618 if (die
->child
!= NULL
)
13620 child_die
= die
->child
;
13621 while (child_die
&& child_die
->tag
)
13623 if (child_die
->tag
== DW_TAG_template_type_param
13624 || child_die
->tag
== DW_TAG_template_value_param
)
13626 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13629 template_args
.push_back (arg
);
13632 process_die (child_die
, cu
);
13633 child_die
= child_die
->sibling
;
13637 inherit_abstract_dies (die
, cu
);
13639 /* If we have a DW_AT_specification, we might need to import using
13640 directives from the context of the specification DIE. See the
13641 comment in determine_prefix. */
13642 if (cu
->language
== language_cplus
13643 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13645 struct dwarf2_cu
*spec_cu
= cu
;
13646 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13650 child_die
= spec_die
->child
;
13651 while (child_die
&& child_die
->tag
)
13653 if (child_die
->tag
== DW_TAG_imported_module
)
13654 process_die (child_die
, spec_cu
);
13655 child_die
= child_die
->sibling
;
13658 /* In some cases, GCC generates specification DIEs that
13659 themselves contain DW_AT_specification attributes. */
13660 spec_die
= die_specification (spec_die
, &spec_cu
);
13664 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13665 /* Make a block for the local symbols within. */
13666 block
= cu
->get_builder ()->finish_block (cstk
.name
, cstk
.old_blocks
,
13667 cstk
.static_link
, lowpc
, highpc
);
13669 /* For C++, set the block's scope. */
13670 if ((cu
->language
== language_cplus
13671 || cu
->language
== language_fortran
13672 || cu
->language
== language_d
13673 || cu
->language
== language_rust
)
13674 && cu
->processing_has_namespace_info
)
13675 block_set_scope (block
, determine_prefix (die
, cu
),
13676 &objfile
->objfile_obstack
);
13678 /* If we have address ranges, record them. */
13679 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13681 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
13683 /* Attach template arguments to function. */
13684 if (!template_args
.empty ())
13686 gdb_assert (templ_func
!= NULL
);
13688 templ_func
->n_template_arguments
= template_args
.size ();
13689 templ_func
->template_arguments
13690 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13691 templ_func
->n_template_arguments
);
13692 memcpy (templ_func
->template_arguments
,
13693 template_args
.data (),
13694 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13696 /* Make sure that the symtab is set on the new symbols. Even
13697 though they don't appear in this symtab directly, other parts
13698 of gdb assume that symbols do, and this is reasonably
13700 for (symbol
*sym
: template_args
)
13701 symbol_set_symtab (sym
, symbol_symtab (templ_func
));
13704 /* In C++, we can have functions nested inside functions (e.g., when
13705 a function declares a class that has methods). This means that
13706 when we finish processing a function scope, we may need to go
13707 back to building a containing block's symbol lists. */
13708 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13709 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13711 /* If we've finished processing a top-level function, subsequent
13712 symbols go in the file symbol list. */
13713 if (cu
->get_builder ()->outermost_context_p ())
13714 cu
->list_in_scope
= cu
->get_builder ()->get_file_symbols ();
13717 /* Process all the DIES contained within a lexical block scope. Start
13718 a new scope, process the dies, and then close the scope. */
13721 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13723 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
13724 struct gdbarch
*gdbarch
= objfile
->arch ();
13725 CORE_ADDR lowpc
, highpc
;
13726 struct die_info
*child_die
;
13727 CORE_ADDR baseaddr
;
13729 baseaddr
= objfile
->text_section_offset ();
13731 /* Ignore blocks with missing or invalid low and high pc attributes. */
13732 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13733 as multiple lexical blocks? Handling children in a sane way would
13734 be nasty. Might be easier to properly extend generic blocks to
13735 describe ranges. */
13736 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13738 case PC_BOUNDS_NOT_PRESENT
:
13739 /* DW_TAG_lexical_block has no attributes, process its children as if
13740 there was no wrapping by that DW_TAG_lexical_block.
13741 GCC does no longer produces such DWARF since GCC r224161. */
13742 for (child_die
= die
->child
;
13743 child_die
!= NULL
&& child_die
->tag
;
13744 child_die
= child_die
->sibling
)
13746 /* We might already be processing this DIE. This can happen
13747 in an unusual circumstance -- where a subroutine A
13748 appears lexically in another subroutine B, but A actually
13749 inlines B. The recursion is broken here, rather than in
13750 inherit_abstract_dies, because it seems better to simply
13751 drop concrete children here. */
13752 if (!child_die
->in_process
)
13753 process_die (child_die
, cu
);
13756 case PC_BOUNDS_INVALID
:
13759 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13760 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13762 cu
->get_builder ()->push_context (0, lowpc
);
13763 if (die
->child
!= NULL
)
13765 child_die
= die
->child
;
13766 while (child_die
&& child_die
->tag
)
13768 process_die (child_die
, cu
);
13769 child_die
= child_die
->sibling
;
13772 inherit_abstract_dies (die
, cu
);
13773 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13775 if (*cu
->get_builder ()->get_local_symbols () != NULL
13776 || (*cu
->get_builder ()->get_local_using_directives ()) != NULL
)
13778 struct block
*block
13779 = cu
->get_builder ()->finish_block (0, cstk
.old_blocks
, NULL
,
13780 cstk
.start_addr
, highpc
);
13782 /* Note that recording ranges after traversing children, as we
13783 do here, means that recording a parent's ranges entails
13784 walking across all its children's ranges as they appear in
13785 the address map, which is quadratic behavior.
13787 It would be nicer to record the parent's ranges before
13788 traversing its children, simply overriding whatever you find
13789 there. But since we don't even decide whether to create a
13790 block until after we've traversed its children, that's hard
13792 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13794 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13795 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13798 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13801 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13803 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
13804 struct objfile
*objfile
= per_objfile
->objfile
;
13805 struct gdbarch
*gdbarch
= objfile
->arch ();
13806 CORE_ADDR pc
, baseaddr
;
13807 struct attribute
*attr
;
13808 struct call_site
*call_site
, call_site_local
;
13811 struct die_info
*child_die
;
13813 baseaddr
= objfile
->text_section_offset ();
13815 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13818 /* This was a pre-DWARF-5 GNU extension alias
13819 for DW_AT_call_return_pc. */
13820 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13824 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13825 "DIE %s [in module %s]"),
13826 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13829 pc
= attr
->as_address () + baseaddr
;
13830 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13832 if (cu
->call_site_htab
== NULL
)
13833 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13834 NULL
, &objfile
->objfile_obstack
,
13835 hashtab_obstack_allocate
, NULL
);
13836 call_site_local
.pc
= pc
;
13837 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13840 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13841 "DIE %s [in module %s]"),
13842 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13843 objfile_name (objfile
));
13847 /* Count parameters at the caller. */
13850 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13851 child_die
= child_die
->sibling
)
13853 if (child_die
->tag
!= DW_TAG_call_site_parameter
13854 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13856 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
13857 "DW_TAG_call_site child DIE %s [in module %s]"),
13858 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13859 objfile_name (objfile
));
13867 = ((struct call_site
*)
13868 obstack_alloc (&objfile
->objfile_obstack
,
13869 sizeof (*call_site
)
13870 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13872 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13873 call_site
->pc
= pc
;
13875 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13876 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13878 struct die_info
*func_die
;
13880 /* Skip also over DW_TAG_inlined_subroutine. */
13881 for (func_die
= die
->parent
;
13882 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13883 && func_die
->tag
!= DW_TAG_subroutine_type
;
13884 func_die
= func_die
->parent
);
13886 /* DW_AT_call_all_calls is a superset
13887 of DW_AT_call_all_tail_calls. */
13889 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13890 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13891 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13892 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13894 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13895 not complete. But keep CALL_SITE for look ups via call_site_htab,
13896 both the initial caller containing the real return address PC and
13897 the final callee containing the current PC of a chain of tail
13898 calls do not need to have the tail call list complete. But any
13899 function candidate for a virtual tail call frame searched via
13900 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13901 determined unambiguously. */
13905 struct type
*func_type
= NULL
;
13908 func_type
= get_die_type (func_die
, cu
);
13909 if (func_type
!= NULL
)
13911 gdb_assert (func_type
->code () == TYPE_CODE_FUNC
);
13913 /* Enlist this call site to the function. */
13914 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13915 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13918 complaint (_("Cannot find function owning DW_TAG_call_site "
13919 "DIE %s [in module %s]"),
13920 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13924 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13926 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13928 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13931 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13932 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13934 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
13935 if (!attr
|| (attr
->form_is_block () && attr
->as_block ()->size
== 0))
13936 /* Keep NULL DWARF_BLOCK. */;
13937 else if (attr
->form_is_block ())
13939 struct dwarf2_locexpr_baton
*dlbaton
;
13940 struct dwarf_block
*block
= attr
->as_block ();
13942 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13943 dlbaton
->data
= block
->data
;
13944 dlbaton
->size
= block
->size
;
13945 dlbaton
->per_objfile
= per_objfile
;
13946 dlbaton
->per_cu
= cu
->per_cu
;
13948 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
13950 else if (attr
->form_is_ref ())
13952 struct dwarf2_cu
*target_cu
= cu
;
13953 struct die_info
*target_die
;
13955 target_die
= follow_die_ref (die
, attr
, &target_cu
);
13956 gdb_assert (target_cu
->per_objfile
->objfile
== objfile
);
13957 if (die_is_declaration (target_die
, target_cu
))
13959 const char *target_physname
;
13961 /* Prefer the mangled name; otherwise compute the demangled one. */
13962 target_physname
= dw2_linkage_name (target_die
, target_cu
);
13963 if (target_physname
== NULL
)
13964 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
13965 if (target_physname
== NULL
)
13966 complaint (_("DW_AT_call_target target DIE has invalid "
13967 "physname, for referencing DIE %s [in module %s]"),
13968 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13970 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
13976 /* DW_AT_entry_pc should be preferred. */
13977 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
13978 <= PC_BOUNDS_INVALID
)
13979 complaint (_("DW_AT_call_target target DIE has invalid "
13980 "low pc, for referencing DIE %s [in module %s]"),
13981 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13984 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13985 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
13990 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
13991 "block nor reference, for DIE %s [in module %s]"),
13992 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13994 call_site
->per_cu
= cu
->per_cu
;
13995 call_site
->per_objfile
= per_objfile
;
13997 for (child_die
= die
->child
;
13998 child_die
&& child_die
->tag
;
13999 child_die
= child_die
->sibling
)
14001 struct call_site_parameter
*parameter
;
14002 struct attribute
*loc
, *origin
;
14004 if (child_die
->tag
!= DW_TAG_call_site_parameter
14005 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14007 /* Already printed the complaint above. */
14011 gdb_assert (call_site
->parameter_count
< nparams
);
14012 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
14014 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
14015 specifies DW_TAG_formal_parameter. Value of the data assumed for the
14016 register is contained in DW_AT_call_value. */
14018 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
14019 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
14020 if (origin
== NULL
)
14022 /* This was a pre-DWARF-5 GNU extension alias
14023 for DW_AT_call_parameter. */
14024 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
14026 if (loc
== NULL
&& origin
!= NULL
&& origin
->form_is_ref ())
14028 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
14030 sect_offset sect_off
= origin
->get_ref_die_offset ();
14031 if (!cu
->header
.offset_in_cu_p (sect_off
))
14033 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
14034 binding can be done only inside one CU. Such referenced DIE
14035 therefore cannot be even moved to DW_TAG_partial_unit. */
14036 complaint (_("DW_AT_call_parameter offset is not in CU for "
14037 "DW_TAG_call_site child DIE %s [in module %s]"),
14038 sect_offset_str (child_die
->sect_off
),
14039 objfile_name (objfile
));
14042 parameter
->u
.param_cu_off
14043 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
14045 else if (loc
== NULL
|| origin
!= NULL
|| !loc
->form_is_block ())
14047 complaint (_("No DW_FORM_block* DW_AT_location for "
14048 "DW_TAG_call_site child DIE %s [in module %s]"),
14049 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
14054 struct dwarf_block
*block
= loc
->as_block ();
14056 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
14057 (block
->data
, &block
->data
[block
->size
]);
14058 if (parameter
->u
.dwarf_reg
!= -1)
14059 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
14060 else if (dwarf_block_to_sp_offset (gdbarch
, block
->data
,
14061 &block
->data
[block
->size
],
14062 ¶meter
->u
.fb_offset
))
14063 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
14066 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
14067 "for DW_FORM_block* DW_AT_location is supported for "
14068 "DW_TAG_call_site child DIE %s "
14070 sect_offset_str (child_die
->sect_off
),
14071 objfile_name (objfile
));
14076 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
14078 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
14079 if (attr
== NULL
|| !attr
->form_is_block ())
14081 complaint (_("No DW_FORM_block* DW_AT_call_value for "
14082 "DW_TAG_call_site child DIE %s [in module %s]"),
14083 sect_offset_str (child_die
->sect_off
),
14084 objfile_name (objfile
));
14088 struct dwarf_block
*block
= attr
->as_block ();
14089 parameter
->value
= block
->data
;
14090 parameter
->value_size
= block
->size
;
14092 /* Parameters are not pre-cleared by memset above. */
14093 parameter
->data_value
= NULL
;
14094 parameter
->data_value_size
= 0;
14095 call_site
->parameter_count
++;
14097 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
14099 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
14100 if (attr
!= nullptr)
14102 if (!attr
->form_is_block ())
14103 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
14104 "DW_TAG_call_site child DIE %s [in module %s]"),
14105 sect_offset_str (child_die
->sect_off
),
14106 objfile_name (objfile
));
14109 block
= attr
->as_block ();
14110 parameter
->data_value
= block
->data
;
14111 parameter
->data_value_size
= block
->size
;
14117 /* Helper function for read_variable. If DIE represents a virtual
14118 table, then return the type of the concrete object that is
14119 associated with the virtual table. Otherwise, return NULL. */
14121 static struct type
*
14122 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14124 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14128 /* Find the type DIE. */
14129 struct die_info
*type_die
= NULL
;
14130 struct dwarf2_cu
*type_cu
= cu
;
14132 if (attr
->form_is_ref ())
14133 type_die
= follow_die_ref (die
, attr
, &type_cu
);
14134 if (type_die
== NULL
)
14137 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
14139 return die_containing_type (type_die
, type_cu
);
14142 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
14145 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
14147 struct rust_vtable_symbol
*storage
= NULL
;
14149 if (cu
->language
== language_rust
)
14151 struct type
*containing_type
= rust_containing_type (die
, cu
);
14153 if (containing_type
!= NULL
)
14155 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
14157 storage
= new (&objfile
->objfile_obstack
) rust_vtable_symbol
;
14158 storage
->concrete_type
= containing_type
;
14159 storage
->subclass
= SYMBOL_RUST_VTABLE
;
14163 struct symbol
*res
= new_symbol (die
, NULL
, cu
, storage
);
14164 struct attribute
*abstract_origin
14165 = dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
14166 struct attribute
*loc
= dwarf2_attr (die
, DW_AT_location
, cu
);
14167 if (res
== NULL
&& loc
&& abstract_origin
)
14169 /* We have a variable without a name, but with a location and an abstract
14170 origin. This may be a concrete instance of an abstract variable
14171 referenced from an DW_OP_GNU_variable_value, so save it to find it back
14173 struct dwarf2_cu
*origin_cu
= cu
;
14174 struct die_info
*origin_die
14175 = follow_die_ref (die
, abstract_origin
, &origin_cu
);
14176 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
14177 per_objfile
->per_bfd
->abstract_to_concrete
14178 [origin_die
->sect_off
].push_back (die
->sect_off
);
14182 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
14183 reading .debug_rnglists.
14184 Callback's type should be:
14185 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14186 Return true if the attributes are present and valid, otherwise,
14189 template <typename Callback
>
14191 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
14192 dwarf_tag tag
, Callback
&&callback
)
14194 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
14195 struct objfile
*objfile
= per_objfile
->objfile
;
14196 bfd
*obfd
= objfile
->obfd
;
14197 /* Base address selection entry. */
14198 gdb::optional
<CORE_ADDR
> base
;
14199 const gdb_byte
*buffer
;
14200 CORE_ADDR baseaddr
;
14201 bool overflow
= false;
14202 ULONGEST addr_index
;
14203 struct dwarf2_section_info
*rnglists_section
;
14205 base
= cu
->base_address
;
14206 rnglists_section
= cu_debug_rnglists_section (cu
, tag
);
14207 rnglists_section
->read (objfile
);
14209 if (offset
>= rnglists_section
->size
)
14211 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14215 buffer
= rnglists_section
->buffer
+ offset
;
14217 baseaddr
= objfile
->text_section_offset ();
14221 /* Initialize it due to a false compiler warning. */
14222 CORE_ADDR range_beginning
= 0, range_end
= 0;
14223 const gdb_byte
*buf_end
= (rnglists_section
->buffer
14224 + rnglists_section
->size
);
14225 unsigned int bytes_read
;
14227 if (buffer
== buf_end
)
14232 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
14235 case DW_RLE_end_of_list
:
14237 case DW_RLE_base_address
:
14238 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14243 base
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
14244 buffer
+= bytes_read
;
14246 case DW_RLE_base_addressx
:
14247 addr_index
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14248 buffer
+= bytes_read
;
14249 base
= read_addr_index (cu
, addr_index
);
14251 case DW_RLE_start_length
:
14252 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14257 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
14259 buffer
+= bytes_read
;
14260 range_end
= (range_beginning
14261 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
14262 buffer
+= bytes_read
;
14263 if (buffer
> buf_end
)
14269 case DW_RLE_startx_length
:
14270 addr_index
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14271 buffer
+= bytes_read
;
14272 range_beginning
= read_addr_index (cu
, addr_index
);
14273 if (buffer
> buf_end
)
14278 range_end
= (range_beginning
14279 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
14280 buffer
+= bytes_read
;
14282 case DW_RLE_offset_pair
:
14283 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14284 buffer
+= bytes_read
;
14285 if (buffer
> buf_end
)
14290 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14291 buffer
+= bytes_read
;
14292 if (buffer
> buf_end
)
14298 case DW_RLE_start_end
:
14299 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
14304 range_beginning
= cu
->header
.read_address (obfd
, buffer
,
14306 buffer
+= bytes_read
;
14307 range_end
= cu
->header
.read_address (obfd
, buffer
, &bytes_read
);
14308 buffer
+= bytes_read
;
14310 case DW_RLE_startx_endx
:
14311 addr_index
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14312 buffer
+= bytes_read
;
14313 range_beginning
= read_addr_index (cu
, addr_index
);
14314 if (buffer
> buf_end
)
14319 addr_index
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14320 buffer
+= bytes_read
;
14321 range_end
= read_addr_index (cu
, addr_index
);
14324 complaint (_("Invalid .debug_rnglists data (no base address)"));
14327 if (rlet
== DW_RLE_end_of_list
|| overflow
)
14329 if (rlet
== DW_RLE_base_address
)
14332 if (range_beginning
> range_end
)
14334 /* Inverted range entries are invalid. */
14335 complaint (_("Invalid .debug_rnglists data (inverted range)"));
14339 /* Empty range entries have no effect. */
14340 if (range_beginning
== range_end
)
14343 /* Only DW_RLE_offset_pair needs the base address added. */
14344 if (rlet
== DW_RLE_offset_pair
)
14346 if (!base
.has_value ())
14348 /* We have no valid base address for the DW_RLE_offset_pair. */
14349 complaint (_("Invalid .debug_rnglists data (no base address for "
14350 "DW_RLE_offset_pair)"));
14354 range_beginning
+= *base
;
14355 range_end
+= *base
;
14358 /* A not-uncommon case of bad debug info.
14359 Don't pollute the addrmap with bad data. */
14360 if (range_beginning
+ baseaddr
== 0
14361 && !per_objfile
->per_bfd
->has_section_at_zero
)
14363 complaint (_(".debug_rnglists entry has start address of zero"
14364 " [in module %s]"), objfile_name (objfile
));
14368 callback (range_beginning
, range_end
);
14373 complaint (_("Offset %d is not terminated "
14374 "for DW_AT_ranges attribute"),
14382 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
14383 Callback's type should be:
14384 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14385 Return 1 if the attributes are present and valid, otherwise, return 0. */
14387 template <typename Callback
>
14389 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
, dwarf_tag tag
,
14390 Callback
&&callback
)
14392 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
14393 struct objfile
*objfile
= per_objfile
->objfile
;
14394 struct comp_unit_head
*cu_header
= &cu
->header
;
14395 bfd
*obfd
= objfile
->obfd
;
14396 unsigned int addr_size
= cu_header
->addr_size
;
14397 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14398 /* Base address selection entry. */
14399 gdb::optional
<CORE_ADDR
> base
;
14400 unsigned int dummy
;
14401 const gdb_byte
*buffer
;
14402 CORE_ADDR baseaddr
;
14404 if (cu_header
->version
>= 5)
14405 return dwarf2_rnglists_process (offset
, cu
, tag
, callback
);
14407 base
= cu
->base_address
;
14409 per_objfile
->per_bfd
->ranges
.read (objfile
);
14410 if (offset
>= per_objfile
->per_bfd
->ranges
.size
)
14412 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14416 buffer
= per_objfile
->per_bfd
->ranges
.buffer
+ offset
;
14418 baseaddr
= objfile
->text_section_offset ();
14422 CORE_ADDR range_beginning
, range_end
;
14424 range_beginning
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
14425 buffer
+= addr_size
;
14426 range_end
= cu
->header
.read_address (obfd
, buffer
, &dummy
);
14427 buffer
+= addr_size
;
14428 offset
+= 2 * addr_size
;
14430 /* An end of list marker is a pair of zero addresses. */
14431 if (range_beginning
== 0 && range_end
== 0)
14432 /* Found the end of list entry. */
14435 /* Each base address selection entry is a pair of 2 values.
14436 The first is the largest possible address, the second is
14437 the base address. Check for a base address here. */
14438 if ((range_beginning
& mask
) == mask
)
14440 /* If we found the largest possible address, then we already
14441 have the base address in range_end. */
14446 if (!base
.has_value ())
14448 /* We have no valid base address for the ranges
14450 complaint (_("Invalid .debug_ranges data (no base address)"));
14454 if (range_beginning
> range_end
)
14456 /* Inverted range entries are invalid. */
14457 complaint (_("Invalid .debug_ranges data (inverted range)"));
14461 /* Empty range entries have no effect. */
14462 if (range_beginning
== range_end
)
14465 range_beginning
+= *base
;
14466 range_end
+= *base
;
14468 /* A not-uncommon case of bad debug info.
14469 Don't pollute the addrmap with bad data. */
14470 if (range_beginning
+ baseaddr
== 0
14471 && !per_objfile
->per_bfd
->has_section_at_zero
)
14473 complaint (_(".debug_ranges entry has start address of zero"
14474 " [in module %s]"), objfile_name (objfile
));
14478 callback (range_beginning
, range_end
);
14484 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
14485 Return 1 if the attributes are present and valid, otherwise, return 0.
14486 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
14489 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
14490 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
14491 dwarf2_psymtab
*ranges_pst
, dwarf_tag tag
)
14493 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
14494 struct gdbarch
*gdbarch
= objfile
->arch ();
14495 const CORE_ADDR baseaddr
= objfile
->text_section_offset ();
14498 CORE_ADDR high
= 0;
14501 retval
= dwarf2_ranges_process (offset
, cu
, tag
,
14502 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
14504 if (ranges_pst
!= NULL
)
14509 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14510 range_beginning
+ baseaddr
)
14512 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14513 range_end
+ baseaddr
)
14515 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
14516 lowpc
, highpc
- 1, ranges_pst
);
14519 /* FIXME: This is recording everything as a low-high
14520 segment of consecutive addresses. We should have a
14521 data structure for discontiguous block ranges
14525 low
= range_beginning
;
14531 if (range_beginning
< low
)
14532 low
= range_beginning
;
14533 if (range_end
> high
)
14541 /* If the first entry is an end-of-list marker, the range
14542 describes an empty scope, i.e. no instructions. */
14548 *high_return
= high
;
14552 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14553 definition for the return value. *LOWPC and *HIGHPC are set iff
14554 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14556 static enum pc_bounds_kind
14557 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14558 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14559 dwarf2_psymtab
*pst
)
14561 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
14562 struct attribute
*attr
;
14563 struct attribute
*attr_high
;
14565 CORE_ADDR high
= 0;
14566 enum pc_bounds_kind ret
;
14568 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14571 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14572 if (attr
!= nullptr)
14574 low
= attr
->as_address ();
14575 high
= attr_high
->as_address ();
14576 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
14580 /* Found high w/o low attribute. */
14581 return PC_BOUNDS_INVALID
;
14583 /* Found consecutive range of addresses. */
14584 ret
= PC_BOUNDS_HIGH_LOW
;
14588 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14591 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
14592 We take advantage of the fact that DW_AT_ranges does not appear
14593 in DW_TAG_compile_unit of DWO files.
14595 Attributes of the form DW_FORM_rnglistx have already had their
14596 value changed by read_rnglist_index and already include
14597 DW_AT_rnglists_base, so don't need to add the ranges base,
14599 int need_ranges_base
= (die
->tag
!= DW_TAG_compile_unit
14600 && attr
->form
!= DW_FORM_rnglistx
);
14601 unsigned int ranges_offset
= (DW_UNSND (attr
)
14602 + (need_ranges_base
14606 /* Value of the DW_AT_ranges attribute is the offset in the
14607 .debug_ranges section. */
14608 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
,
14610 return PC_BOUNDS_INVALID
;
14611 /* Found discontinuous range of addresses. */
14612 ret
= PC_BOUNDS_RANGES
;
14615 return PC_BOUNDS_NOT_PRESENT
;
14618 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14620 return PC_BOUNDS_INVALID
;
14622 /* When using the GNU linker, .gnu.linkonce. sections are used to
14623 eliminate duplicate copies of functions and vtables and such.
14624 The linker will arbitrarily choose one and discard the others.
14625 The AT_*_pc values for such functions refer to local labels in
14626 these sections. If the section from that file was discarded, the
14627 labels are not in the output, so the relocs get a value of 0.
14628 If this is a discarded function, mark the pc bounds as invalid,
14629 so that GDB will ignore it. */
14630 if (low
== 0 && !per_objfile
->per_bfd
->has_section_at_zero
)
14631 return PC_BOUNDS_INVALID
;
14639 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14640 its low and high PC addresses. Do nothing if these addresses could not
14641 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14642 and HIGHPC to the high address if greater than HIGHPC. */
14645 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14646 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14647 struct dwarf2_cu
*cu
)
14649 CORE_ADDR low
, high
;
14650 struct die_info
*child
= die
->child
;
14652 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14654 *lowpc
= std::min (*lowpc
, low
);
14655 *highpc
= std::max (*highpc
, high
);
14658 /* If the language does not allow nested subprograms (either inside
14659 subprograms or lexical blocks), we're done. */
14660 if (cu
->language
!= language_ada
)
14663 /* Check all the children of the given DIE. If it contains nested
14664 subprograms, then check their pc bounds. Likewise, we need to
14665 check lexical blocks as well, as they may also contain subprogram
14667 while (child
&& child
->tag
)
14669 if (child
->tag
== DW_TAG_subprogram
14670 || child
->tag
== DW_TAG_lexical_block
)
14671 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14672 child
= child
->sibling
;
14676 /* Get the low and high pc's represented by the scope DIE, and store
14677 them in *LOWPC and *HIGHPC. If the correct values can't be
14678 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14681 get_scope_pc_bounds (struct die_info
*die
,
14682 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14683 struct dwarf2_cu
*cu
)
14685 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14686 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14687 CORE_ADDR current_low
, current_high
;
14689 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14690 >= PC_BOUNDS_RANGES
)
14692 best_low
= current_low
;
14693 best_high
= current_high
;
14697 struct die_info
*child
= die
->child
;
14699 while (child
&& child
->tag
)
14701 switch (child
->tag
) {
14702 case DW_TAG_subprogram
:
14703 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14705 case DW_TAG_namespace
:
14706 case DW_TAG_module
:
14707 /* FIXME: carlton/2004-01-16: Should we do this for
14708 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14709 that current GCC's always emit the DIEs corresponding
14710 to definitions of methods of classes as children of a
14711 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14712 the DIEs giving the declarations, which could be
14713 anywhere). But I don't see any reason why the
14714 standards says that they have to be there. */
14715 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14717 if (current_low
!= ((CORE_ADDR
) -1))
14719 best_low
= std::min (best_low
, current_low
);
14720 best_high
= std::max (best_high
, current_high
);
14728 child
= child
->sibling
;
14733 *highpc
= best_high
;
14736 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14740 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14741 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14743 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
14744 struct gdbarch
*gdbarch
= objfile
->arch ();
14745 struct attribute
*attr
;
14746 struct attribute
*attr_high
;
14748 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14751 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14752 if (attr
!= nullptr)
14754 CORE_ADDR low
= attr
->as_address ();
14755 CORE_ADDR high
= attr_high
->as_address ();
14757 if (cu
->header
.version
>= 4 && attr_high
->form_is_constant ())
14760 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14761 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14762 cu
->get_builder ()->record_block_range (block
, low
, high
- 1);
14766 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14767 if (attr
!= nullptr)
14769 /* DW_AT_rnglists_base does not apply to DIEs from the DWO skeleton.
14770 We take advantage of the fact that DW_AT_ranges does not appear
14771 in DW_TAG_compile_unit of DWO files.
14773 Attributes of the form DW_FORM_rnglistx have already had their
14774 value changed by read_rnglist_index and already include
14775 DW_AT_rnglists_base, so don't need to add the ranges base,
14777 int need_ranges_base
= (die
->tag
!= DW_TAG_compile_unit
14778 && attr
->form
!= DW_FORM_rnglistx
);
14780 /* The value of the DW_AT_ranges attribute is the offset of the
14781 address range list in the .debug_ranges section. */
14782 unsigned long offset
= (DW_UNSND (attr
)
14783 + (need_ranges_base
? cu
->ranges_base
: 0));
14785 std::vector
<blockrange
> blockvec
;
14786 dwarf2_ranges_process (offset
, cu
, die
->tag
,
14787 [&] (CORE_ADDR start
, CORE_ADDR end
)
14791 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14792 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14793 cu
->get_builder ()->record_block_range (block
, start
, end
- 1);
14794 blockvec
.emplace_back (start
, end
);
14797 BLOCK_RANGES(block
) = make_blockranges (objfile
, blockvec
);
14801 /* Check whether the producer field indicates either of GCC < 4.6, or the
14802 Intel C/C++ compiler, and cache the result in CU. */
14805 check_producer (struct dwarf2_cu
*cu
)
14809 if (cu
->producer
== NULL
)
14811 /* For unknown compilers expect their behavior is DWARF version
14814 GCC started to support .debug_types sections by -gdwarf-4 since
14815 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14816 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14817 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14818 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14820 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14822 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14823 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14825 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14827 cu
->producer_is_icc
= true;
14828 cu
->producer_is_icc_lt_14
= major
< 14;
14830 else if (startswith (cu
->producer
, "CodeWarrior S12/L-ISA"))
14831 cu
->producer_is_codewarrior
= true;
14834 /* For other non-GCC compilers, expect their behavior is DWARF version
14838 cu
->checked_producer
= true;
14841 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14842 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14843 during 4.6.0 experimental. */
14846 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14848 if (!cu
->checked_producer
)
14849 check_producer (cu
);
14851 return cu
->producer_is_gxx_lt_4_6
;
14855 /* Codewarrior (at least as of version 5.0.40) generates dwarf line information
14856 with incorrect is_stmt attributes. */
14859 producer_is_codewarrior (struct dwarf2_cu
*cu
)
14861 if (!cu
->checked_producer
)
14862 check_producer (cu
);
14864 return cu
->producer_is_codewarrior
;
14867 /* Return the default accessibility type if it is not overridden by
14868 DW_AT_accessibility. */
14870 static enum dwarf_access_attribute
14871 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14873 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14875 /* The default DWARF 2 accessibility for members is public, the default
14876 accessibility for inheritance is private. */
14878 if (die
->tag
!= DW_TAG_inheritance
)
14879 return DW_ACCESS_public
;
14881 return DW_ACCESS_private
;
14885 /* DWARF 3+ defines the default accessibility a different way. The same
14886 rules apply now for DW_TAG_inheritance as for the members and it only
14887 depends on the container kind. */
14889 if (die
->parent
->tag
== DW_TAG_class_type
)
14890 return DW_ACCESS_private
;
14892 return DW_ACCESS_public
;
14896 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14897 offset. If the attribute was not found return 0, otherwise return
14898 1. If it was found but could not properly be handled, set *OFFSET
14902 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14905 struct attribute
*attr
;
14907 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14912 /* Note that we do not check for a section offset first here.
14913 This is because DW_AT_data_member_location is new in DWARF 4,
14914 so if we see it, we can assume that a constant form is really
14915 a constant and not a section offset. */
14916 if (attr
->form_is_constant ())
14917 *offset
= attr
->constant_value (0);
14918 else if (attr
->form_is_section_offset ())
14919 dwarf2_complex_location_expr_complaint ();
14920 else if (attr
->form_is_block ())
14921 *offset
= decode_locdesc (attr
->as_block (), cu
);
14923 dwarf2_complex_location_expr_complaint ();
14931 /* Look for DW_AT_data_member_location and store the results in FIELD. */
14934 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14935 struct field
*field
)
14937 struct attribute
*attr
;
14939 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14942 if (attr
->form_is_constant ())
14944 LONGEST offset
= attr
->constant_value (0);
14945 SET_FIELD_BITPOS (*field
, offset
* bits_per_byte
);
14947 else if (attr
->form_is_section_offset ())
14948 dwarf2_complex_location_expr_complaint ();
14949 else if (attr
->form_is_block ())
14952 CORE_ADDR offset
= decode_locdesc (attr
->as_block (), cu
, &handled
);
14954 SET_FIELD_BITPOS (*field
, offset
* bits_per_byte
);
14957 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
14958 struct objfile
*objfile
= per_objfile
->objfile
;
14959 struct dwarf2_locexpr_baton
*dlbaton
14960 = XOBNEW (&objfile
->objfile_obstack
,
14961 struct dwarf2_locexpr_baton
);
14962 dlbaton
->data
= attr
->as_block ()->data
;
14963 dlbaton
->size
= attr
->as_block ()->size
;
14964 /* When using this baton, we want to compute the address
14965 of the field, not the value. This is why
14966 is_reference is set to false here. */
14967 dlbaton
->is_reference
= false;
14968 dlbaton
->per_objfile
= per_objfile
;
14969 dlbaton
->per_cu
= cu
->per_cu
;
14971 SET_FIELD_DWARF_BLOCK (*field
, dlbaton
);
14975 dwarf2_complex_location_expr_complaint ();
14979 /* Add an aggregate field to the field list. */
14982 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14983 struct dwarf2_cu
*cu
)
14985 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
14986 struct gdbarch
*gdbarch
= objfile
->arch ();
14987 struct nextfield
*new_field
;
14988 struct attribute
*attr
;
14990 const char *fieldname
= "";
14992 if (die
->tag
== DW_TAG_inheritance
)
14994 fip
->baseclasses
.emplace_back ();
14995 new_field
= &fip
->baseclasses
.back ();
14999 fip
->fields
.emplace_back ();
15000 new_field
= &fip
->fields
.back ();
15003 new_field
->offset
= die
->sect_off
;
15005 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15006 if (attr
!= nullptr)
15007 new_field
->accessibility
= DW_UNSND (attr
);
15009 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
15010 if (new_field
->accessibility
!= DW_ACCESS_public
)
15011 fip
->non_public_fields
= true;
15013 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15014 if (attr
!= nullptr)
15015 new_field
->virtuality
= DW_UNSND (attr
);
15017 new_field
->virtuality
= DW_VIRTUALITY_none
;
15019 fp
= &new_field
->field
;
15021 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
15023 /* Data member other than a C++ static data member. */
15025 /* Get type of field. */
15026 fp
->set_type (die_type (die
, cu
));
15028 SET_FIELD_BITPOS (*fp
, 0);
15030 /* Get bit size of field (zero if none). */
15031 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
15032 if (attr
!= nullptr)
15034 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
15038 FIELD_BITSIZE (*fp
) = 0;
15041 /* Get bit offset of field. */
15042 handle_data_member_location (die
, cu
, fp
);
15043 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
15044 if (attr
!= nullptr)
15046 if (gdbarch_byte_order (gdbarch
) == BFD_ENDIAN_BIG
)
15048 /* For big endian bits, the DW_AT_bit_offset gives the
15049 additional bit offset from the MSB of the containing
15050 anonymous object to the MSB of the field. We don't
15051 have to do anything special since we don't need to
15052 know the size of the anonymous object. */
15053 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
15057 /* For little endian bits, compute the bit offset to the
15058 MSB of the anonymous object, subtract off the number of
15059 bits from the MSB of the field to the MSB of the
15060 object, and then subtract off the number of bits of
15061 the field itself. The result is the bit offset of
15062 the LSB of the field. */
15063 int anonymous_size
;
15064 int bit_offset
= DW_UNSND (attr
);
15066 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15067 if (attr
!= nullptr)
15069 /* The size of the anonymous object containing
15070 the bit field is explicit, so use the
15071 indicated size (in bytes). */
15072 anonymous_size
= DW_UNSND (attr
);
15076 /* The size of the anonymous object containing
15077 the bit field must be inferred from the type
15078 attribute of the data member containing the
15080 anonymous_size
= TYPE_LENGTH (fp
->type ());
15082 SET_FIELD_BITPOS (*fp
,
15083 (FIELD_BITPOS (*fp
)
15084 + anonymous_size
* bits_per_byte
15085 - bit_offset
- FIELD_BITSIZE (*fp
)));
15088 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
15090 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
15091 + attr
->constant_value (0)));
15093 /* Get name of field. */
15094 fieldname
= dwarf2_name (die
, cu
);
15095 if (fieldname
== NULL
)
15098 /* The name is already allocated along with this objfile, so we don't
15099 need to duplicate it for the type. */
15100 fp
->name
= fieldname
;
15102 /* Change accessibility for artificial fields (e.g. virtual table
15103 pointer or virtual base class pointer) to private. */
15104 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
15106 FIELD_ARTIFICIAL (*fp
) = 1;
15107 new_field
->accessibility
= DW_ACCESS_private
;
15108 fip
->non_public_fields
= true;
15111 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
15113 /* C++ static member. */
15115 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
15116 is a declaration, but all versions of G++ as of this writing
15117 (so through at least 3.2.1) incorrectly generate
15118 DW_TAG_variable tags. */
15120 const char *physname
;
15122 /* Get name of field. */
15123 fieldname
= dwarf2_name (die
, cu
);
15124 if (fieldname
== NULL
)
15127 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15129 /* Only create a symbol if this is an external value.
15130 new_symbol checks this and puts the value in the global symbol
15131 table, which we want. If it is not external, new_symbol
15132 will try to put the value in cu->list_in_scope which is wrong. */
15133 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
15135 /* A static const member, not much different than an enum as far as
15136 we're concerned, except that we can support more types. */
15137 new_symbol (die
, NULL
, cu
);
15140 /* Get physical name. */
15141 physname
= dwarf2_physname (fieldname
, die
, cu
);
15143 /* The name is already allocated along with this objfile, so we don't
15144 need to duplicate it for the type. */
15145 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
15146 fp
->set_type (die_type (die
, cu
));
15147 FIELD_NAME (*fp
) = fieldname
;
15149 else if (die
->tag
== DW_TAG_inheritance
)
15151 /* C++ base class field. */
15152 handle_data_member_location (die
, cu
, fp
);
15153 FIELD_BITSIZE (*fp
) = 0;
15154 fp
->set_type (die_type (die
, cu
));
15155 FIELD_NAME (*fp
) = fp
->type ()->name ();
15158 gdb_assert_not_reached ("missing case in dwarf2_add_field");
15161 /* Can the type given by DIE define another type? */
15164 type_can_define_types (const struct die_info
*die
)
15168 case DW_TAG_typedef
:
15169 case DW_TAG_class_type
:
15170 case DW_TAG_structure_type
:
15171 case DW_TAG_union_type
:
15172 case DW_TAG_enumeration_type
:
15180 /* Add a type definition defined in the scope of the FIP's class. */
15183 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
15184 struct dwarf2_cu
*cu
)
15186 struct decl_field fp
;
15187 memset (&fp
, 0, sizeof (fp
));
15189 gdb_assert (type_can_define_types (die
));
15191 /* Get name of field. NULL is okay here, meaning an anonymous type. */
15192 fp
.name
= dwarf2_name (die
, cu
);
15193 fp
.type
= read_type_die (die
, cu
);
15195 /* Save accessibility. */
15196 enum dwarf_access_attribute accessibility
;
15197 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15199 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15201 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15202 switch (accessibility
)
15204 case DW_ACCESS_public
:
15205 /* The assumed value if neither private nor protected. */
15207 case DW_ACCESS_private
:
15210 case DW_ACCESS_protected
:
15211 fp
.is_protected
= 1;
15214 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
15217 if (die
->tag
== DW_TAG_typedef
)
15218 fip
->typedef_field_list
.push_back (fp
);
15220 fip
->nested_types_list
.push_back (fp
);
15223 /* A convenience typedef that's used when finding the discriminant
15224 field for a variant part. */
15225 typedef std::unordered_map
<sect_offset
, int, gdb::hash_enum
<sect_offset
>>
15228 /* Compute the discriminant range for a given variant. OBSTACK is
15229 where the results will be stored. VARIANT is the variant to
15230 process. IS_UNSIGNED indicates whether the discriminant is signed
15233 static const gdb::array_view
<discriminant_range
>
15234 convert_variant_range (struct obstack
*obstack
, const variant_field
&variant
,
15237 std::vector
<discriminant_range
> ranges
;
15239 if (variant
.default_branch
)
15242 if (variant
.discr_list_data
== nullptr)
15244 discriminant_range r
15245 = {variant
.discriminant_value
, variant
.discriminant_value
};
15246 ranges
.push_back (r
);
15250 gdb::array_view
<const gdb_byte
> data (variant
.discr_list_data
->data
,
15251 variant
.discr_list_data
->size
);
15252 while (!data
.empty ())
15254 if (data
[0] != DW_DSC_range
&& data
[0] != DW_DSC_label
)
15256 complaint (_("invalid discriminant marker: %d"), data
[0]);
15259 bool is_range
= data
[0] == DW_DSC_range
;
15260 data
= data
.slice (1);
15262 ULONGEST low
, high
;
15263 unsigned int bytes_read
;
15267 complaint (_("DW_AT_discr_list missing low value"));
15271 low
= read_unsigned_leb128 (nullptr, data
.data (), &bytes_read
);
15273 low
= (ULONGEST
) read_signed_leb128 (nullptr, data
.data (),
15275 data
= data
.slice (bytes_read
);
15281 complaint (_("DW_AT_discr_list missing high value"));
15285 high
= read_unsigned_leb128 (nullptr, data
.data (),
15288 high
= (LONGEST
) read_signed_leb128 (nullptr, data
.data (),
15290 data
= data
.slice (bytes_read
);
15295 ranges
.push_back ({ low
, high
});
15299 discriminant_range
*result
= XOBNEWVEC (obstack
, discriminant_range
,
15301 std::copy (ranges
.begin (), ranges
.end (), result
);
15302 return gdb::array_view
<discriminant_range
> (result
, ranges
.size ());
15305 static const gdb::array_view
<variant_part
> create_variant_parts
15306 (struct obstack
*obstack
,
15307 const offset_map_type
&offset_map
,
15308 struct field_info
*fi
,
15309 const std::vector
<variant_part_builder
> &variant_parts
);
15311 /* Fill in a "struct variant" for a given variant field. RESULT is
15312 the variant to fill in. OBSTACK is where any needed allocations
15313 will be done. OFFSET_MAP holds the mapping from section offsets to
15314 fields for the type. FI describes the fields of the type we're
15315 processing. FIELD is the variant field we're converting. */
15318 create_one_variant (variant
&result
, struct obstack
*obstack
,
15319 const offset_map_type
&offset_map
,
15320 struct field_info
*fi
, const variant_field
&field
)
15322 result
.discriminants
= convert_variant_range (obstack
, field
, false);
15323 result
.first_field
= field
.first_field
+ fi
->baseclasses
.size ();
15324 result
.last_field
= field
.last_field
+ fi
->baseclasses
.size ();
15325 result
.parts
= create_variant_parts (obstack
, offset_map
, fi
,
15326 field
.variant_parts
);
15329 /* Fill in a "struct variant_part" for a given variant part. RESULT
15330 is the variant part to fill in. OBSTACK is where any needed
15331 allocations will be done. OFFSET_MAP holds the mapping from
15332 section offsets to fields for the type. FI describes the fields of
15333 the type we're processing. BUILDER is the variant part to be
15337 create_one_variant_part (variant_part
&result
,
15338 struct obstack
*obstack
,
15339 const offset_map_type
&offset_map
,
15340 struct field_info
*fi
,
15341 const variant_part_builder
&builder
)
15343 auto iter
= offset_map
.find (builder
.discriminant_offset
);
15344 if (iter
== offset_map
.end ())
15346 result
.discriminant_index
= -1;
15347 /* Doesn't matter. */
15348 result
.is_unsigned
= false;
15352 result
.discriminant_index
= iter
->second
;
15354 = fi
->fields
[result
.discriminant_index
].field
.type ()->is_unsigned ();
15357 size_t n
= builder
.variants
.size ();
15358 variant
*output
= new (obstack
) variant
[n
];
15359 for (size_t i
= 0; i
< n
; ++i
)
15360 create_one_variant (output
[i
], obstack
, offset_map
, fi
,
15361 builder
.variants
[i
]);
15363 result
.variants
= gdb::array_view
<variant
> (output
, n
);
15366 /* Create a vector of variant parts that can be attached to a type.
15367 OBSTACK is where any needed allocations will be done. OFFSET_MAP
15368 holds the mapping from section offsets to fields for the type. FI
15369 describes the fields of the type we're processing. VARIANT_PARTS
15370 is the vector to convert. */
15372 static const gdb::array_view
<variant_part
>
15373 create_variant_parts (struct obstack
*obstack
,
15374 const offset_map_type
&offset_map
,
15375 struct field_info
*fi
,
15376 const std::vector
<variant_part_builder
> &variant_parts
)
15378 if (variant_parts
.empty ())
15381 size_t n
= variant_parts
.size ();
15382 variant_part
*result
= new (obstack
) variant_part
[n
];
15383 for (size_t i
= 0; i
< n
; ++i
)
15384 create_one_variant_part (result
[i
], obstack
, offset_map
, fi
,
15387 return gdb::array_view
<variant_part
> (result
, n
);
15390 /* Compute the variant part vector for FIP, attaching it to TYPE when
15394 add_variant_property (struct field_info
*fip
, struct type
*type
,
15395 struct dwarf2_cu
*cu
)
15397 /* Map section offsets of fields to their field index. Note the
15398 field index here does not take the number of baseclasses into
15400 offset_map_type offset_map
;
15401 for (int i
= 0; i
< fip
->fields
.size (); ++i
)
15402 offset_map
[fip
->fields
[i
].offset
] = i
;
15404 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
15405 gdb::array_view
<variant_part
> parts
15406 = create_variant_parts (&objfile
->objfile_obstack
, offset_map
, fip
,
15407 fip
->variant_parts
);
15409 struct dynamic_prop prop
;
15410 prop
.set_variant_parts ((gdb::array_view
<variant_part
> *)
15411 obstack_copy (&objfile
->objfile_obstack
, &parts
,
15414 type
->add_dyn_prop (DYN_PROP_VARIANT_PARTS
, prop
);
15417 /* Create the vector of fields, and attach it to the type. */
15420 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
15421 struct dwarf2_cu
*cu
)
15423 int nfields
= fip
->nfields ();
15425 /* Record the field count, allocate space for the array of fields,
15426 and create blank accessibility bitfields if necessary. */
15427 type
->set_num_fields (nfields
);
15429 ((struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
));
15431 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
15433 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15435 TYPE_FIELD_PRIVATE_BITS (type
) =
15436 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15437 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
15439 TYPE_FIELD_PROTECTED_BITS (type
) =
15440 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15441 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
15443 TYPE_FIELD_IGNORE_BITS (type
) =
15444 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15445 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
15448 /* If the type has baseclasses, allocate and clear a bit vector for
15449 TYPE_FIELD_VIRTUAL_BITS. */
15450 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
15452 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
15453 unsigned char *pointer
;
15455 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15456 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
15457 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
15458 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
15459 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
15462 if (!fip
->variant_parts
.empty ())
15463 add_variant_property (fip
, type
, cu
);
15465 /* Copy the saved-up fields into the field vector. */
15466 for (int i
= 0; i
< nfields
; ++i
)
15468 struct nextfield
&field
15469 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
15470 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
15472 type
->field (i
) = field
.field
;
15473 switch (field
.accessibility
)
15475 case DW_ACCESS_private
:
15476 if (cu
->language
!= language_ada
)
15477 SET_TYPE_FIELD_PRIVATE (type
, i
);
15480 case DW_ACCESS_protected
:
15481 if (cu
->language
!= language_ada
)
15482 SET_TYPE_FIELD_PROTECTED (type
, i
);
15485 case DW_ACCESS_public
:
15489 /* Unknown accessibility. Complain and treat it as public. */
15491 complaint (_("unsupported accessibility %d"),
15492 field
.accessibility
);
15496 if (i
< fip
->baseclasses
.size ())
15498 switch (field
.virtuality
)
15500 case DW_VIRTUALITY_virtual
:
15501 case DW_VIRTUALITY_pure_virtual
:
15502 if (cu
->language
== language_ada
)
15503 error (_("unexpected virtuality in component of Ada type"));
15504 SET_TYPE_FIELD_VIRTUAL (type
, i
);
15511 /* Return true if this member function is a constructor, false
15515 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
15517 const char *fieldname
;
15518 const char *type_name
;
15521 if (die
->parent
== NULL
)
15524 if (die
->parent
->tag
!= DW_TAG_structure_type
15525 && die
->parent
->tag
!= DW_TAG_union_type
15526 && die
->parent
->tag
!= DW_TAG_class_type
)
15529 fieldname
= dwarf2_name (die
, cu
);
15530 type_name
= dwarf2_name (die
->parent
, cu
);
15531 if (fieldname
== NULL
|| type_name
== NULL
)
15534 len
= strlen (fieldname
);
15535 return (strncmp (fieldname
, type_name
, len
) == 0
15536 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
15539 /* Check if the given VALUE is a recognized enum
15540 dwarf_defaulted_attribute constant according to DWARF5 spec,
15544 is_valid_DW_AT_defaulted (ULONGEST value
)
15548 case DW_DEFAULTED_no
:
15549 case DW_DEFAULTED_in_class
:
15550 case DW_DEFAULTED_out_of_class
:
15554 complaint (_("unrecognized DW_AT_defaulted value (%s)"), pulongest (value
));
15558 /* Add a member function to the proper fieldlist. */
15561 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15562 struct type
*type
, struct dwarf2_cu
*cu
)
15564 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
15565 struct attribute
*attr
;
15567 struct fnfieldlist
*flp
= nullptr;
15568 struct fn_field
*fnp
;
15569 const char *fieldname
;
15570 struct type
*this_type
;
15571 enum dwarf_access_attribute accessibility
;
15573 if (cu
->language
== language_ada
)
15574 error (_("unexpected member function in Ada type"));
15576 /* Get name of member function. */
15577 fieldname
= dwarf2_name (die
, cu
);
15578 if (fieldname
== NULL
)
15581 /* Look up member function name in fieldlist. */
15582 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15584 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15586 flp
= &fip
->fnfieldlists
[i
];
15591 /* Create a new fnfieldlist if necessary. */
15592 if (flp
== nullptr)
15594 fip
->fnfieldlists
.emplace_back ();
15595 flp
= &fip
->fnfieldlists
.back ();
15596 flp
->name
= fieldname
;
15597 i
= fip
->fnfieldlists
.size () - 1;
15600 /* Create a new member function field and add it to the vector of
15602 flp
->fnfields
.emplace_back ();
15603 fnp
= &flp
->fnfields
.back ();
15605 /* Delay processing of the physname until later. */
15606 if (cu
->language
== language_cplus
)
15607 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15611 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15612 fnp
->physname
= physname
? physname
: "";
15615 fnp
->type
= alloc_type (objfile
);
15616 this_type
= read_type_die (die
, cu
);
15617 if (this_type
&& this_type
->code () == TYPE_CODE_FUNC
)
15619 int nparams
= this_type
->num_fields ();
15621 /* TYPE is the domain of this method, and THIS_TYPE is the type
15622 of the method itself (TYPE_CODE_METHOD). */
15623 smash_to_method_type (fnp
->type
, type
,
15624 TYPE_TARGET_TYPE (this_type
),
15625 this_type
->fields (),
15626 this_type
->num_fields (),
15627 this_type
->has_varargs ());
15629 /* Handle static member functions.
15630 Dwarf2 has no clean way to discern C++ static and non-static
15631 member functions. G++ helps GDB by marking the first
15632 parameter for non-static member functions (which is the this
15633 pointer) as artificial. We obtain this information from
15634 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15635 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15636 fnp
->voffset
= VOFFSET_STATIC
;
15639 complaint (_("member function type missing for '%s'"),
15640 dwarf2_full_name (fieldname
, die
, cu
));
15642 /* Get fcontext from DW_AT_containing_type if present. */
15643 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15644 fnp
->fcontext
= die_containing_type (die
, cu
);
15646 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15647 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15649 /* Get accessibility. */
15650 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15651 if (attr
!= nullptr)
15652 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15654 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15655 switch (accessibility
)
15657 case DW_ACCESS_private
:
15658 fnp
->is_private
= 1;
15660 case DW_ACCESS_protected
:
15661 fnp
->is_protected
= 1;
15665 /* Check for artificial methods. */
15666 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15667 if (attr
&& DW_UNSND (attr
) != 0)
15668 fnp
->is_artificial
= 1;
15670 /* Check for defaulted methods. */
15671 attr
= dwarf2_attr (die
, DW_AT_defaulted
, cu
);
15672 if (attr
!= nullptr && is_valid_DW_AT_defaulted (DW_UNSND (attr
)))
15673 fnp
->defaulted
= (enum dwarf_defaulted_attribute
) DW_UNSND (attr
);
15675 /* Check for deleted methods. */
15676 attr
= dwarf2_attr (die
, DW_AT_deleted
, cu
);
15677 if (attr
!= nullptr && DW_UNSND (attr
) != 0)
15678 fnp
->is_deleted
= 1;
15680 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15682 /* Get index in virtual function table if it is a virtual member
15683 function. For older versions of GCC, this is an offset in the
15684 appropriate virtual table, as specified by DW_AT_containing_type.
15685 For everyone else, it is an expression to be evaluated relative
15686 to the object address. */
15688 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15689 if (attr
!= nullptr)
15691 if (attr
->form_is_block () && attr
->as_block ()->size
> 0)
15693 struct dwarf_block
*block
= attr
->as_block ();
15695 if (block
->data
[0] == DW_OP_constu
)
15697 /* Old-style GCC. */
15698 fnp
->voffset
= decode_locdesc (block
, cu
) + 2;
15700 else if (block
->data
[0] == DW_OP_deref
15701 || (block
->size
> 1
15702 && block
->data
[0] == DW_OP_deref_size
15703 && block
->data
[1] == cu
->header
.addr_size
))
15705 fnp
->voffset
= decode_locdesc (block
, cu
);
15706 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15707 dwarf2_complex_location_expr_complaint ();
15709 fnp
->voffset
/= cu
->header
.addr_size
;
15713 dwarf2_complex_location_expr_complaint ();
15715 if (!fnp
->fcontext
)
15717 /* If there is no `this' field and no DW_AT_containing_type,
15718 we cannot actually find a base class context for the
15720 if (this_type
->num_fields () == 0
15721 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15723 complaint (_("cannot determine context for virtual member "
15724 "function \"%s\" (offset %s)"),
15725 fieldname
, sect_offset_str (die
->sect_off
));
15730 = TYPE_TARGET_TYPE (this_type
->field (0).type ());
15734 else if (attr
->form_is_section_offset ())
15736 dwarf2_complex_location_expr_complaint ();
15740 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15746 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15747 if (attr
&& DW_UNSND (attr
))
15749 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15750 complaint (_("Member function \"%s\" (offset %s) is virtual "
15751 "but the vtable offset is not specified"),
15752 fieldname
, sect_offset_str (die
->sect_off
));
15753 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15754 TYPE_CPLUS_DYNAMIC (type
) = 1;
15759 /* Create the vector of member function fields, and attach it to the type. */
15762 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15763 struct dwarf2_cu
*cu
)
15765 if (cu
->language
== language_ada
)
15766 error (_("unexpected member functions in Ada type"));
15768 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15769 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15771 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15773 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15775 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15776 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15778 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15779 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15780 fn_flp
->fn_fields
= (struct fn_field
*)
15781 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15783 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15784 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15787 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15790 /* Returns non-zero if NAME is the name of a vtable member in CU's
15791 language, zero otherwise. */
15793 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15795 static const char vptr
[] = "_vptr";
15797 /* Look for the C++ form of the vtable. */
15798 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15804 /* GCC outputs unnamed structures that are really pointers to member
15805 functions, with the ABI-specified layout. If TYPE describes
15806 such a structure, smash it into a member function type.
15808 GCC shouldn't do this; it should just output pointer to member DIEs.
15809 This is GCC PR debug/28767. */
15812 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15814 struct type
*pfn_type
, *self_type
, *new_type
;
15816 /* Check for a structure with no name and two children. */
15817 if (type
->code () != TYPE_CODE_STRUCT
|| type
->num_fields () != 2)
15820 /* Check for __pfn and __delta members. */
15821 if (TYPE_FIELD_NAME (type
, 0) == NULL
15822 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15823 || TYPE_FIELD_NAME (type
, 1) == NULL
15824 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15827 /* Find the type of the method. */
15828 pfn_type
= type
->field (0).type ();
15829 if (pfn_type
== NULL
15830 || pfn_type
->code () != TYPE_CODE_PTR
15831 || TYPE_TARGET_TYPE (pfn_type
)->code () != TYPE_CODE_FUNC
)
15834 /* Look for the "this" argument. */
15835 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15836 if (pfn_type
->num_fields () == 0
15837 /* || pfn_type->field (0).type () == NULL */
15838 || pfn_type
->field (0).type ()->code () != TYPE_CODE_PTR
)
15841 self_type
= TYPE_TARGET_TYPE (pfn_type
->field (0).type ());
15842 new_type
= alloc_type (objfile
);
15843 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15844 pfn_type
->fields (), pfn_type
->num_fields (),
15845 pfn_type
->has_varargs ());
15846 smash_to_methodptr_type (type
, new_type
);
15849 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15850 appropriate error checking and issuing complaints if there is a
15854 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15856 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15858 if (attr
== nullptr)
15861 if (!attr
->form_is_constant ())
15863 complaint (_("DW_AT_alignment must have constant form"
15864 " - DIE at %s [in module %s]"),
15865 sect_offset_str (die
->sect_off
),
15866 objfile_name (cu
->per_objfile
->objfile
));
15871 if (attr
->form
== DW_FORM_sdata
)
15873 LONGEST val
= attr
->as_signed ();
15876 complaint (_("DW_AT_alignment value must not be negative"
15877 " - DIE at %s [in module %s]"),
15878 sect_offset_str (die
->sect_off
),
15879 objfile_name (cu
->per_objfile
->objfile
));
15885 align
= DW_UNSND (attr
);
15889 complaint (_("DW_AT_alignment value must not be zero"
15890 " - DIE at %s [in module %s]"),
15891 sect_offset_str (die
->sect_off
),
15892 objfile_name (cu
->per_objfile
->objfile
));
15895 if ((align
& (align
- 1)) != 0)
15897 complaint (_("DW_AT_alignment value must be a power of 2"
15898 " - DIE at %s [in module %s]"),
15899 sect_offset_str (die
->sect_off
),
15900 objfile_name (cu
->per_objfile
->objfile
));
15907 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15908 the alignment for TYPE. */
15911 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15914 if (!set_type_align (type
, get_alignment (cu
, die
)))
15915 complaint (_("DW_AT_alignment value too large"
15916 " - DIE at %s [in module %s]"),
15917 sect_offset_str (die
->sect_off
),
15918 objfile_name (cu
->per_objfile
->objfile
));
15921 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15922 constant for a type, according to DWARF5 spec, Table 5.5. */
15925 is_valid_DW_AT_calling_convention_for_type (ULONGEST value
)
15930 case DW_CC_pass_by_reference
:
15931 case DW_CC_pass_by_value
:
15935 complaint (_("unrecognized DW_AT_calling_convention value "
15936 "(%s) for a type"), pulongest (value
));
15941 /* Check if the given VALUE is a valid enum dwarf_calling_convention
15942 constant for a subroutine, according to DWARF5 spec, Table 3.3, and
15943 also according to GNU-specific values (see include/dwarf2.h). */
15946 is_valid_DW_AT_calling_convention_for_subroutine (ULONGEST value
)
15951 case DW_CC_program
:
15955 case DW_CC_GNU_renesas_sh
:
15956 case DW_CC_GNU_borland_fastcall_i386
:
15957 case DW_CC_GDB_IBM_OpenCL
:
15961 complaint (_("unrecognized DW_AT_calling_convention value "
15962 "(%s) for a subroutine"), pulongest (value
));
15967 /* Called when we find the DIE that starts a structure or union scope
15968 (definition) to create a type for the structure or union. Fill in
15969 the type's name and general properties; the members will not be
15970 processed until process_structure_scope. A symbol table entry for
15971 the type will also not be done until process_structure_scope (assuming
15972 the type has a name).
15974 NOTE: we need to call these functions regardless of whether or not the
15975 DIE has a DW_AT_name attribute, since it might be an anonymous
15976 structure or union. This gets the type entered into our set of
15977 user defined types. */
15979 static struct type
*
15980 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15982 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
15984 struct attribute
*attr
;
15987 /* If the definition of this type lives in .debug_types, read that type.
15988 Don't follow DW_AT_specification though, that will take us back up
15989 the chain and we want to go down. */
15990 attr
= die
->attr (DW_AT_signature
);
15991 if (attr
!= nullptr)
15993 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15995 /* The type's CU may not be the same as CU.
15996 Ensure TYPE is recorded with CU in die_type_hash. */
15997 return set_die_type (die
, type
, cu
);
16000 type
= alloc_type (objfile
);
16001 INIT_CPLUS_SPECIFIC (type
);
16003 name
= dwarf2_name (die
, cu
);
16006 if (cu
->language
== language_cplus
16007 || cu
->language
== language_d
16008 || cu
->language
== language_rust
)
16010 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
16012 /* dwarf2_full_name might have already finished building the DIE's
16013 type. If so, there is no need to continue. */
16014 if (get_die_type (die
, cu
) != NULL
)
16015 return get_die_type (die
, cu
);
16017 type
->set_name (full_name
);
16021 /* The name is already allocated along with this objfile, so
16022 we don't need to duplicate it for the type. */
16023 type
->set_name (name
);
16027 if (die
->tag
== DW_TAG_structure_type
)
16029 type
->set_code (TYPE_CODE_STRUCT
);
16031 else if (die
->tag
== DW_TAG_union_type
)
16033 type
->set_code (TYPE_CODE_UNION
);
16037 type
->set_code (TYPE_CODE_STRUCT
);
16040 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
16041 TYPE_DECLARED_CLASS (type
) = 1;
16043 /* Store the calling convention in the type if it's available in
16044 the die. Otherwise the calling convention remains set to
16045 the default value DW_CC_normal. */
16046 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
16047 if (attr
!= nullptr
16048 && is_valid_DW_AT_calling_convention_for_type (DW_UNSND (attr
)))
16050 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16051 TYPE_CPLUS_CALLING_CONVENTION (type
)
16052 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
16055 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16056 if (attr
!= nullptr)
16058 if (attr
->form_is_constant ())
16059 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16062 struct dynamic_prop prop
;
16063 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, cu
->addr_type ()))
16064 type
->add_dyn_prop (DYN_PROP_BYTE_SIZE
, prop
);
16065 TYPE_LENGTH (type
) = 0;
16070 TYPE_LENGTH (type
) = 0;
16073 maybe_set_alignment (cu
, die
, type
);
16075 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
16077 /* ICC<14 does not output the required DW_AT_declaration on
16078 incomplete types, but gives them a size of zero. */
16079 type
->set_is_stub (true);
16082 type
->set_stub_is_supported (true);
16084 if (die_is_declaration (die
, cu
))
16085 type
->set_is_stub (true);
16086 else if (attr
== NULL
&& die
->child
== NULL
16087 && producer_is_realview (cu
->producer
))
16088 /* RealView does not output the required DW_AT_declaration
16089 on incomplete types. */
16090 type
->set_is_stub (true);
16092 /* We need to add the type field to the die immediately so we don't
16093 infinitely recurse when dealing with pointers to the structure
16094 type within the structure itself. */
16095 set_die_type (die
, type
, cu
);
16097 /* set_die_type should be already done. */
16098 set_descriptive_type (type
, die
, cu
);
16103 static void handle_struct_member_die
16104 (struct die_info
*child_die
,
16106 struct field_info
*fi
,
16107 std::vector
<struct symbol
*> *template_args
,
16108 struct dwarf2_cu
*cu
);
16110 /* A helper for handle_struct_member_die that handles
16111 DW_TAG_variant_part. */
16114 handle_variant_part (struct die_info
*die
, struct type
*type
,
16115 struct field_info
*fi
,
16116 std::vector
<struct symbol
*> *template_args
,
16117 struct dwarf2_cu
*cu
)
16119 variant_part_builder
*new_part
;
16120 if (fi
->current_variant_part
== nullptr)
16122 fi
->variant_parts
.emplace_back ();
16123 new_part
= &fi
->variant_parts
.back ();
16125 else if (!fi
->current_variant_part
->processing_variant
)
16127 complaint (_("nested DW_TAG_variant_part seen "
16128 "- DIE at %s [in module %s]"),
16129 sect_offset_str (die
->sect_off
),
16130 objfile_name (cu
->per_objfile
->objfile
));
16135 variant_field
¤t
= fi
->current_variant_part
->variants
.back ();
16136 current
.variant_parts
.emplace_back ();
16137 new_part
= ¤t
.variant_parts
.back ();
16140 /* When we recurse, we want callees to add to this new variant
16142 scoped_restore save_current_variant_part
16143 = make_scoped_restore (&fi
->current_variant_part
, new_part
);
16145 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
16148 /* It's a univariant form, an extension we support. */
16150 else if (discr
->form_is_ref ())
16152 struct dwarf2_cu
*target_cu
= cu
;
16153 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
16155 new_part
->discriminant_offset
= target_die
->sect_off
;
16159 complaint (_("DW_AT_discr does not have DIE reference form"
16160 " - DIE at %s [in module %s]"),
16161 sect_offset_str (die
->sect_off
),
16162 objfile_name (cu
->per_objfile
->objfile
));
16165 for (die_info
*child_die
= die
->child
;
16167 child_die
= child_die
->sibling
)
16168 handle_struct_member_die (child_die
, type
, fi
, template_args
, cu
);
16171 /* A helper for handle_struct_member_die that handles
16175 handle_variant (struct die_info
*die
, struct type
*type
,
16176 struct field_info
*fi
,
16177 std::vector
<struct symbol
*> *template_args
,
16178 struct dwarf2_cu
*cu
)
16180 if (fi
->current_variant_part
== nullptr)
16182 complaint (_("saw DW_TAG_variant outside DW_TAG_variant_part "
16183 "- DIE at %s [in module %s]"),
16184 sect_offset_str (die
->sect_off
),
16185 objfile_name (cu
->per_objfile
->objfile
));
16188 if (fi
->current_variant_part
->processing_variant
)
16190 complaint (_("nested DW_TAG_variant seen "
16191 "- DIE at %s [in module %s]"),
16192 sect_offset_str (die
->sect_off
),
16193 objfile_name (cu
->per_objfile
->objfile
));
16197 scoped_restore save_processing_variant
16198 = make_scoped_restore (&fi
->current_variant_part
->processing_variant
,
16201 fi
->current_variant_part
->variants
.emplace_back ();
16202 variant_field
&variant
= fi
->current_variant_part
->variants
.back ();
16203 variant
.first_field
= fi
->fields
.size ();
16205 /* In a variant we want to get the discriminant and also add a
16206 field for our sole member child. */
16207 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr_value
, cu
);
16208 if (discr
== nullptr)
16210 discr
= dwarf2_attr (die
, DW_AT_discr_list
, cu
);
16211 if (discr
== nullptr || discr
->as_block ()->size
== 0)
16212 variant
.default_branch
= true;
16214 variant
.discr_list_data
= discr
->as_block ();
16217 variant
.discriminant_value
= DW_UNSND (discr
);
16219 for (die_info
*variant_child
= die
->child
;
16220 variant_child
!= NULL
;
16221 variant_child
= variant_child
->sibling
)
16222 handle_struct_member_die (variant_child
, type
, fi
, template_args
, cu
);
16224 variant
.last_field
= fi
->fields
.size ();
16227 /* A helper for process_structure_scope that handles a single member
16231 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
16232 struct field_info
*fi
,
16233 std::vector
<struct symbol
*> *template_args
,
16234 struct dwarf2_cu
*cu
)
16236 if (child_die
->tag
== DW_TAG_member
16237 || child_die
->tag
== DW_TAG_variable
)
16239 /* NOTE: carlton/2002-11-05: A C++ static data member
16240 should be a DW_TAG_member that is a declaration, but
16241 all versions of G++ as of this writing (so through at
16242 least 3.2.1) incorrectly generate DW_TAG_variable
16243 tags for them instead. */
16244 dwarf2_add_field (fi
, child_die
, cu
);
16246 else if (child_die
->tag
== DW_TAG_subprogram
)
16248 /* Rust doesn't have member functions in the C++ sense.
16249 However, it does emit ordinary functions as children
16250 of a struct DIE. */
16251 if (cu
->language
== language_rust
)
16252 read_func_scope (child_die
, cu
);
16255 /* C++ member function. */
16256 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
16259 else if (child_die
->tag
== DW_TAG_inheritance
)
16261 /* C++ base class field. */
16262 dwarf2_add_field (fi
, child_die
, cu
);
16264 else if (type_can_define_types (child_die
))
16265 dwarf2_add_type_defn (fi
, child_die
, cu
);
16266 else if (child_die
->tag
== DW_TAG_template_type_param
16267 || child_die
->tag
== DW_TAG_template_value_param
)
16269 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
16272 template_args
->push_back (arg
);
16274 else if (child_die
->tag
== DW_TAG_variant_part
)
16275 handle_variant_part (child_die
, type
, fi
, template_args
, cu
);
16276 else if (child_die
->tag
== DW_TAG_variant
)
16277 handle_variant (child_die
, type
, fi
, template_args
, cu
);
16280 /* Finish creating a structure or union type, including filling in
16281 its members and creating a symbol for it. */
16284 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16286 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16287 struct die_info
*child_die
;
16290 type
= get_die_type (die
, cu
);
16292 type
= read_structure_type (die
, cu
);
16294 bool has_template_parameters
= false;
16295 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
16297 struct field_info fi
;
16298 std::vector
<struct symbol
*> template_args
;
16300 child_die
= die
->child
;
16302 while (child_die
&& child_die
->tag
)
16304 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
16305 child_die
= child_die
->sibling
;
16308 /* Attach template arguments to type. */
16309 if (!template_args
.empty ())
16311 has_template_parameters
= true;
16312 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16313 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
16314 TYPE_TEMPLATE_ARGUMENTS (type
)
16315 = XOBNEWVEC (&objfile
->objfile_obstack
,
16317 TYPE_N_TEMPLATE_ARGUMENTS (type
));
16318 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
16319 template_args
.data (),
16320 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
16321 * sizeof (struct symbol
*)));
16324 /* Attach fields and member functions to the type. */
16325 if (fi
.nfields () > 0)
16326 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
16327 if (!fi
.fnfieldlists
.empty ())
16329 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
16331 /* Get the type which refers to the base class (possibly this
16332 class itself) which contains the vtable pointer for the current
16333 class from the DW_AT_containing_type attribute. This use of
16334 DW_AT_containing_type is a GNU extension. */
16336 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
16338 struct type
*t
= die_containing_type (die
, cu
);
16340 set_type_vptr_basetype (type
, t
);
16345 /* Our own class provides vtbl ptr. */
16346 for (i
= t
->num_fields () - 1;
16347 i
>= TYPE_N_BASECLASSES (t
);
16350 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
16352 if (is_vtable_name (fieldname
, cu
))
16354 set_type_vptr_fieldno (type
, i
);
16359 /* Complain if virtual function table field not found. */
16360 if (i
< TYPE_N_BASECLASSES (t
))
16361 complaint (_("virtual function table pointer "
16362 "not found when defining class '%s'"),
16363 type
->name () ? type
->name () : "");
16367 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
16370 else if (cu
->producer
16371 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
16373 /* The IBM XLC compiler does not provide direct indication
16374 of the containing type, but the vtable pointer is
16375 always named __vfp. */
16379 for (i
= type
->num_fields () - 1;
16380 i
>= TYPE_N_BASECLASSES (type
);
16383 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
16385 set_type_vptr_fieldno (type
, i
);
16386 set_type_vptr_basetype (type
, type
);
16393 /* Copy fi.typedef_field_list linked list elements content into the
16394 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
16395 if (!fi
.typedef_field_list
.empty ())
16397 int count
= fi
.typedef_field_list
.size ();
16399 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16400 TYPE_TYPEDEF_FIELD_ARRAY (type
)
16401 = ((struct decl_field
*)
16403 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
16404 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
16406 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
16407 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
16410 /* Copy fi.nested_types_list linked list elements content into the
16411 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
16412 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
16414 int count
= fi
.nested_types_list
.size ();
16416 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16417 TYPE_NESTED_TYPES_ARRAY (type
)
16418 = ((struct decl_field
*)
16419 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
16420 TYPE_NESTED_TYPES_COUNT (type
) = count
;
16422 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
16423 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
16427 quirk_gcc_member_function_pointer (type
, objfile
);
16428 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
16429 cu
->rust_unions
.push_back (type
);
16431 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
16432 snapshots) has been known to create a die giving a declaration
16433 for a class that has, as a child, a die giving a definition for a
16434 nested class. So we have to process our children even if the
16435 current die is a declaration. Normally, of course, a declaration
16436 won't have any children at all. */
16438 child_die
= die
->child
;
16440 while (child_die
!= NULL
&& child_die
->tag
)
16442 if (child_die
->tag
== DW_TAG_member
16443 || child_die
->tag
== DW_TAG_variable
16444 || child_die
->tag
== DW_TAG_inheritance
16445 || child_die
->tag
== DW_TAG_template_value_param
16446 || child_die
->tag
== DW_TAG_template_type_param
)
16451 process_die (child_die
, cu
);
16453 child_die
= child_die
->sibling
;
16456 /* Do not consider external references. According to the DWARF standard,
16457 these DIEs are identified by the fact that they have no byte_size
16458 attribute, and a declaration attribute. */
16459 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
16460 || !die_is_declaration (die
, cu
)
16461 || dwarf2_attr (die
, DW_AT_signature
, cu
) != NULL
)
16463 struct symbol
*sym
= new_symbol (die
, type
, cu
);
16465 if (has_template_parameters
)
16467 struct symtab
*symtab
;
16468 if (sym
!= nullptr)
16469 symtab
= symbol_symtab (sym
);
16470 else if (cu
->line_header
!= nullptr)
16472 /* Any related symtab will do. */
16474 = cu
->line_header
->file_names ()[0].symtab
;
16479 complaint (_("could not find suitable "
16480 "symtab for template parameter"
16481 " - DIE at %s [in module %s]"),
16482 sect_offset_str (die
->sect_off
),
16483 objfile_name (objfile
));
16486 if (symtab
!= nullptr)
16488 /* Make sure that the symtab is set on the new symbols.
16489 Even though they don't appear in this symtab directly,
16490 other parts of gdb assume that symbols do, and this is
16491 reasonably true. */
16492 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
16493 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
), symtab
);
16499 /* Assuming DIE is an enumeration type, and TYPE is its associated
16500 type, update TYPE using some information only available in DIE's
16501 children. In particular, the fields are computed. */
16504 update_enumeration_type_from_children (struct die_info
*die
,
16506 struct dwarf2_cu
*cu
)
16508 struct die_info
*child_die
;
16509 int unsigned_enum
= 1;
16512 auto_obstack obstack
;
16513 std::vector
<struct field
> fields
;
16515 for (child_die
= die
->child
;
16516 child_die
!= NULL
&& child_die
->tag
;
16517 child_die
= child_die
->sibling
)
16519 struct attribute
*attr
;
16521 const gdb_byte
*bytes
;
16522 struct dwarf2_locexpr_baton
*baton
;
16525 if (child_die
->tag
!= DW_TAG_enumerator
)
16528 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
16532 name
= dwarf2_name (child_die
, cu
);
16534 name
= "<anonymous enumerator>";
16536 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
16537 &value
, &bytes
, &baton
);
16545 if (count_one_bits_ll (value
) >= 2)
16549 fields
.emplace_back ();
16550 struct field
&field
= fields
.back ();
16551 FIELD_NAME (field
) = dwarf2_physname (name
, child_die
, cu
);
16552 SET_FIELD_ENUMVAL (field
, value
);
16555 if (!fields
.empty ())
16557 type
->set_num_fields (fields
.size ());
16560 TYPE_ALLOC (type
, sizeof (struct field
) * fields
.size ()));
16561 memcpy (type
->fields (), fields
.data (),
16562 sizeof (struct field
) * fields
.size ());
16566 type
->set_is_unsigned (true);
16569 TYPE_FLAG_ENUM (type
) = 1;
16572 /* Given a DW_AT_enumeration_type die, set its type. We do not
16573 complete the type's fields yet, or create any symbols. */
16575 static struct type
*
16576 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16578 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16580 struct attribute
*attr
;
16583 /* If the definition of this type lives in .debug_types, read that type.
16584 Don't follow DW_AT_specification though, that will take us back up
16585 the chain and we want to go down. */
16586 attr
= die
->attr (DW_AT_signature
);
16587 if (attr
!= nullptr)
16589 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16591 /* The type's CU may not be the same as CU.
16592 Ensure TYPE is recorded with CU in die_type_hash. */
16593 return set_die_type (die
, type
, cu
);
16596 type
= alloc_type (objfile
);
16598 type
->set_code (TYPE_CODE_ENUM
);
16599 name
= dwarf2_full_name (NULL
, die
, cu
);
16601 type
->set_name (name
);
16603 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16606 struct type
*underlying_type
= die_type (die
, cu
);
16608 TYPE_TARGET_TYPE (type
) = underlying_type
;
16611 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16612 if (attr
!= nullptr)
16614 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16618 TYPE_LENGTH (type
) = 0;
16621 maybe_set_alignment (cu
, die
, type
);
16623 /* The enumeration DIE can be incomplete. In Ada, any type can be
16624 declared as private in the package spec, and then defined only
16625 inside the package body. Such types are known as Taft Amendment
16626 Types. When another package uses such a type, an incomplete DIE
16627 may be generated by the compiler. */
16628 if (die_is_declaration (die
, cu
))
16629 type
->set_is_stub (true);
16631 /* If this type has an underlying type that is not a stub, then we
16632 may use its attributes. We always use the "unsigned" attribute
16633 in this situation, because ordinarily we guess whether the type
16634 is unsigned -- but the guess can be wrong and the underlying type
16635 can tell us the reality. However, we defer to a local size
16636 attribute if one exists, because this lets the compiler override
16637 the underlying type if needed. */
16638 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_TARGET_TYPE (type
)->is_stub ())
16640 struct type
*underlying_type
= TYPE_TARGET_TYPE (type
);
16641 underlying_type
= check_typedef (underlying_type
);
16643 type
->set_is_unsigned (underlying_type
->is_unsigned ());
16645 if (TYPE_LENGTH (type
) == 0)
16646 TYPE_LENGTH (type
) = TYPE_LENGTH (underlying_type
);
16648 if (TYPE_RAW_ALIGN (type
) == 0
16649 && TYPE_RAW_ALIGN (underlying_type
) != 0)
16650 set_type_align (type
, TYPE_RAW_ALIGN (underlying_type
));
16653 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16655 set_die_type (die
, type
, cu
);
16657 /* Finish the creation of this type by using the enum's children.
16658 Note that, as usual, this must come after set_die_type to avoid
16659 infinite recursion when trying to compute the names of the
16661 update_enumeration_type_from_children (die
, type
, cu
);
16666 /* Given a pointer to a die which begins an enumeration, process all
16667 the dies that define the members of the enumeration, and create the
16668 symbol for the enumeration type.
16670 NOTE: We reverse the order of the element list. */
16673 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16675 struct type
*this_type
;
16677 this_type
= get_die_type (die
, cu
);
16678 if (this_type
== NULL
)
16679 this_type
= read_enumeration_type (die
, cu
);
16681 if (die
->child
!= NULL
)
16683 struct die_info
*child_die
;
16686 child_die
= die
->child
;
16687 while (child_die
&& child_die
->tag
)
16689 if (child_die
->tag
!= DW_TAG_enumerator
)
16691 process_die (child_die
, cu
);
16695 name
= dwarf2_name (child_die
, cu
);
16697 new_symbol (child_die
, this_type
, cu
);
16700 child_die
= child_die
->sibling
;
16704 /* If we are reading an enum from a .debug_types unit, and the enum
16705 is a declaration, and the enum is not the signatured type in the
16706 unit, then we do not want to add a symbol for it. Adding a
16707 symbol would in some cases obscure the true definition of the
16708 enum, giving users an incomplete type when the definition is
16709 actually available. Note that we do not want to do this for all
16710 enums which are just declarations, because C++0x allows forward
16711 enum declarations. */
16712 if (cu
->per_cu
->is_debug_types
16713 && die_is_declaration (die
, cu
))
16715 struct signatured_type
*sig_type
;
16717 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16718 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16719 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16723 new_symbol (die
, this_type
, cu
);
16726 /* Extract all information from a DW_TAG_array_type DIE and put it in
16727 the DIE's type field. For now, this only handles one dimensional
16730 static struct type
*
16731 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16733 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
16734 struct die_info
*child_die
;
16736 struct type
*element_type
, *range_type
, *index_type
;
16737 struct attribute
*attr
;
16739 struct dynamic_prop
*byte_stride_prop
= NULL
;
16740 unsigned int bit_stride
= 0;
16742 element_type
= die_type (die
, cu
);
16744 /* The die_type call above may have already set the type for this DIE. */
16745 type
= get_die_type (die
, cu
);
16749 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16753 struct type
*prop_type
= cu
->addr_sized_int_type (false);
16756 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16757 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
,
16761 complaint (_("unable to read array DW_AT_byte_stride "
16762 " - DIE at %s [in module %s]"),
16763 sect_offset_str (die
->sect_off
),
16764 objfile_name (cu
->per_objfile
->objfile
));
16765 /* Ignore this attribute. We will likely not be able to print
16766 arrays of this type correctly, but there is little we can do
16767 to help if we cannot read the attribute's value. */
16768 byte_stride_prop
= NULL
;
16772 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16774 bit_stride
= DW_UNSND (attr
);
16776 /* Irix 6.2 native cc creates array types without children for
16777 arrays with unspecified length. */
16778 if (die
->child
== NULL
)
16780 index_type
= objfile_type (objfile
)->builtin_int
;
16781 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16782 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16783 byte_stride_prop
, bit_stride
);
16784 return set_die_type (die
, type
, cu
);
16787 std::vector
<struct type
*> range_types
;
16788 child_die
= die
->child
;
16789 while (child_die
&& child_die
->tag
)
16791 if (child_die
->tag
== DW_TAG_subrange_type
)
16793 struct type
*child_type
= read_type_die (child_die
, cu
);
16795 if (child_type
!= NULL
)
16797 /* The range type was succesfully read. Save it for the
16798 array type creation. */
16799 range_types
.push_back (child_type
);
16802 child_die
= child_die
->sibling
;
16805 /* Dwarf2 dimensions are output from left to right, create the
16806 necessary array types in backwards order. */
16808 type
= element_type
;
16810 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16814 while (i
< range_types
.size ())
16815 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16816 byte_stride_prop
, bit_stride
);
16820 size_t ndim
= range_types
.size ();
16822 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16823 byte_stride_prop
, bit_stride
);
16826 /* Understand Dwarf2 support for vector types (like they occur on
16827 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16828 array type. This is not part of the Dwarf2/3 standard yet, but a
16829 custom vendor extension. The main difference between a regular
16830 array and the vector variant is that vectors are passed by value
16832 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16833 if (attr
!= nullptr)
16834 make_vector_type (type
);
16836 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16837 implementation may choose to implement triple vectors using this
16839 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16840 if (attr
!= nullptr)
16842 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16843 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16845 complaint (_("DW_AT_byte_size for array type smaller "
16846 "than the total size of elements"));
16849 name
= dwarf2_name (die
, cu
);
16851 type
->set_name (name
);
16853 maybe_set_alignment (cu
, die
, type
);
16855 /* Install the type in the die. */
16856 set_die_type (die
, type
, cu
);
16858 /* set_die_type should be already done. */
16859 set_descriptive_type (type
, die
, cu
);
16864 static enum dwarf_array_dim_ordering
16865 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16867 struct attribute
*attr
;
16869 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16871 if (attr
!= nullptr)
16873 LONGEST val
= attr
->constant_value (-1);
16874 if (val
== DW_ORD_row_major
|| val
== DW_ORD_col_major
)
16875 return (enum dwarf_array_dim_ordering
) val
;
16878 /* GNU F77 is a special case, as at 08/2004 array type info is the
16879 opposite order to the dwarf2 specification, but data is still
16880 laid out as per normal fortran.
16882 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16883 version checking. */
16885 if (cu
->language
== language_fortran
16886 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16888 return DW_ORD_row_major
;
16891 switch (cu
->language_defn
->array_ordering ())
16893 case array_column_major
:
16894 return DW_ORD_col_major
;
16895 case array_row_major
:
16897 return DW_ORD_row_major
;
16901 /* Extract all information from a DW_TAG_set_type DIE and put it in
16902 the DIE's type field. */
16904 static struct type
*
16905 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16907 struct type
*domain_type
, *set_type
;
16908 struct attribute
*attr
;
16910 domain_type
= die_type (die
, cu
);
16912 /* The die_type call above may have already set the type for this DIE. */
16913 set_type
= get_die_type (die
, cu
);
16917 set_type
= create_set_type (NULL
, domain_type
);
16919 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16920 if (attr
!= nullptr)
16921 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16923 maybe_set_alignment (cu
, die
, set_type
);
16925 return set_die_type (die
, set_type
, cu
);
16928 /* A helper for read_common_block that creates a locexpr baton.
16929 SYM is the symbol which we are marking as computed.
16930 COMMON_DIE is the DIE for the common block.
16931 COMMON_LOC is the location expression attribute for the common
16933 MEMBER_LOC is the location expression attribute for the particular
16934 member of the common block that we are processing.
16935 CU is the CU from which the above come. */
16938 mark_common_block_symbol_computed (struct symbol
*sym
,
16939 struct die_info
*common_die
,
16940 struct attribute
*common_loc
,
16941 struct attribute
*member_loc
,
16942 struct dwarf2_cu
*cu
)
16944 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
16945 struct objfile
*objfile
= per_objfile
->objfile
;
16946 struct dwarf2_locexpr_baton
*baton
;
16948 unsigned int cu_off
;
16949 enum bfd_endian byte_order
= gdbarch_byte_order (objfile
->arch ());
16950 LONGEST offset
= 0;
16952 gdb_assert (common_loc
&& member_loc
);
16953 gdb_assert (common_loc
->form_is_block ());
16954 gdb_assert (member_loc
->form_is_block ()
16955 || member_loc
->form_is_constant ());
16957 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16958 baton
->per_objfile
= per_objfile
;
16959 baton
->per_cu
= cu
->per_cu
;
16960 gdb_assert (baton
->per_cu
);
16962 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16964 if (member_loc
->form_is_constant ())
16966 offset
= member_loc
->constant_value (0);
16967 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16970 baton
->size
+= member_loc
->as_block ()->size
;
16972 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16975 *ptr
++ = DW_OP_call4
;
16976 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16977 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16980 if (member_loc
->form_is_constant ())
16982 *ptr
++ = DW_OP_addr
;
16983 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16984 ptr
+= cu
->header
.addr_size
;
16988 /* We have to copy the data here, because DW_OP_call4 will only
16989 use a DW_AT_location attribute. */
16990 struct dwarf_block
*block
= member_loc
->as_block ();
16991 memcpy (ptr
, block
->data
, block
->size
);
16992 ptr
+= block
->size
;
16995 *ptr
++ = DW_OP_plus
;
16996 gdb_assert (ptr
- baton
->data
== baton
->size
);
16998 SYMBOL_LOCATION_BATON (sym
) = baton
;
16999 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
17002 /* Create appropriate locally-scoped variables for all the
17003 DW_TAG_common_block entries. Also create a struct common_block
17004 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
17005 is used to separate the common blocks name namespace from regular
17009 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
17011 struct attribute
*attr
;
17013 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
17014 if (attr
!= nullptr)
17016 /* Support the .debug_loc offsets. */
17017 if (attr
->form_is_block ())
17021 else if (attr
->form_is_section_offset ())
17023 dwarf2_complex_location_expr_complaint ();
17028 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17029 "common block member");
17034 if (die
->child
!= NULL
)
17036 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17037 struct die_info
*child_die
;
17038 size_t n_entries
= 0, size
;
17039 struct common_block
*common_block
;
17040 struct symbol
*sym
;
17042 for (child_die
= die
->child
;
17043 child_die
&& child_die
->tag
;
17044 child_die
= child_die
->sibling
)
17047 size
= (sizeof (struct common_block
)
17048 + (n_entries
- 1) * sizeof (struct symbol
*));
17050 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
17052 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
17053 common_block
->n_entries
= 0;
17055 for (child_die
= die
->child
;
17056 child_die
&& child_die
->tag
;
17057 child_die
= child_die
->sibling
)
17059 /* Create the symbol in the DW_TAG_common_block block in the current
17061 sym
= new_symbol (child_die
, NULL
, cu
);
17064 struct attribute
*member_loc
;
17066 common_block
->contents
[common_block
->n_entries
++] = sym
;
17068 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
17072 /* GDB has handled this for a long time, but it is
17073 not specified by DWARF. It seems to have been
17074 emitted by gfortran at least as recently as:
17075 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
17076 complaint (_("Variable in common block has "
17077 "DW_AT_data_member_location "
17078 "- DIE at %s [in module %s]"),
17079 sect_offset_str (child_die
->sect_off
),
17080 objfile_name (objfile
));
17082 if (member_loc
->form_is_section_offset ())
17083 dwarf2_complex_location_expr_complaint ();
17084 else if (member_loc
->form_is_constant ()
17085 || member_loc
->form_is_block ())
17087 if (attr
!= nullptr)
17088 mark_common_block_symbol_computed (sym
, die
, attr
,
17092 dwarf2_complex_location_expr_complaint ();
17097 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
17098 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
17102 /* Create a type for a C++ namespace. */
17104 static struct type
*
17105 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17107 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17108 const char *previous_prefix
, *name
;
17112 /* For extensions, reuse the type of the original namespace. */
17113 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
17115 struct die_info
*ext_die
;
17116 struct dwarf2_cu
*ext_cu
= cu
;
17118 ext_die
= dwarf2_extension (die
, &ext_cu
);
17119 type
= read_type_die (ext_die
, ext_cu
);
17121 /* EXT_CU may not be the same as CU.
17122 Ensure TYPE is recorded with CU in die_type_hash. */
17123 return set_die_type (die
, type
, cu
);
17126 name
= namespace_name (die
, &is_anonymous
, cu
);
17128 /* Now build the name of the current namespace. */
17130 previous_prefix
= determine_prefix (die
, cu
);
17131 if (previous_prefix
[0] != '\0')
17132 name
= typename_concat (&objfile
->objfile_obstack
,
17133 previous_prefix
, name
, 0, cu
);
17135 /* Create the type. */
17136 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
17138 return set_die_type (die
, type
, cu
);
17141 /* Read a namespace scope. */
17144 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
17146 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17149 /* Add a symbol associated to this if we haven't seen the namespace
17150 before. Also, add a using directive if it's an anonymous
17153 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
17157 type
= read_type_die (die
, cu
);
17158 new_symbol (die
, type
, cu
);
17160 namespace_name (die
, &is_anonymous
, cu
);
17163 const char *previous_prefix
= determine_prefix (die
, cu
);
17165 std::vector
<const char *> excludes
;
17166 add_using_directive (using_directives (cu
),
17167 previous_prefix
, type
->name (), NULL
,
17168 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
17172 if (die
->child
!= NULL
)
17174 struct die_info
*child_die
= die
->child
;
17176 while (child_die
&& child_die
->tag
)
17178 process_die (child_die
, cu
);
17179 child_die
= child_die
->sibling
;
17184 /* Read a Fortran module as type. This DIE can be only a declaration used for
17185 imported module. Still we need that type as local Fortran "use ... only"
17186 declaration imports depend on the created type in determine_prefix. */
17188 static struct type
*
17189 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17191 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17192 const char *module_name
;
17195 module_name
= dwarf2_name (die
, cu
);
17196 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
17198 return set_die_type (die
, type
, cu
);
17201 /* Read a Fortran module. */
17204 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
17206 struct die_info
*child_die
= die
->child
;
17209 type
= read_type_die (die
, cu
);
17210 new_symbol (die
, type
, cu
);
17212 while (child_die
&& child_die
->tag
)
17214 process_die (child_die
, cu
);
17215 child_die
= child_die
->sibling
;
17219 /* Return the name of the namespace represented by DIE. Set
17220 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
17223 static const char *
17224 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
17226 struct die_info
*current_die
;
17227 const char *name
= NULL
;
17229 /* Loop through the extensions until we find a name. */
17231 for (current_die
= die
;
17232 current_die
!= NULL
;
17233 current_die
= dwarf2_extension (die
, &cu
))
17235 /* We don't use dwarf2_name here so that we can detect the absence
17236 of a name -> anonymous namespace. */
17237 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
17243 /* Is it an anonymous namespace? */
17245 *is_anonymous
= (name
== NULL
);
17247 name
= CP_ANONYMOUS_NAMESPACE_STR
;
17252 /* Extract all information from a DW_TAG_pointer_type DIE and add to
17253 the user defined type vector. */
17255 static struct type
*
17256 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17258 struct gdbarch
*gdbarch
= cu
->per_objfile
->objfile
->arch ();
17259 struct comp_unit_head
*cu_header
= &cu
->header
;
17261 struct attribute
*attr_byte_size
;
17262 struct attribute
*attr_address_class
;
17263 int byte_size
, addr_class
;
17264 struct type
*target_type
;
17266 target_type
= die_type (die
, cu
);
17268 /* The die_type call above may have already set the type for this DIE. */
17269 type
= get_die_type (die
, cu
);
17273 type
= lookup_pointer_type (target_type
);
17275 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17276 if (attr_byte_size
)
17277 byte_size
= DW_UNSND (attr_byte_size
);
17279 byte_size
= cu_header
->addr_size
;
17281 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
17282 if (attr_address_class
)
17283 addr_class
= DW_UNSND (attr_address_class
);
17285 addr_class
= DW_ADDR_none
;
17287 ULONGEST alignment
= get_alignment (cu
, die
);
17289 /* If the pointer size, alignment, or address class is different
17290 than the default, create a type variant marked as such and set
17291 the length accordingly. */
17292 if (TYPE_LENGTH (type
) != byte_size
17293 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
17294 && alignment
!= TYPE_RAW_ALIGN (type
))
17295 || addr_class
!= DW_ADDR_none
)
17297 if (gdbarch_address_class_type_flags_p (gdbarch
))
17299 type_instance_flags type_flags
17300 = gdbarch_address_class_type_flags (gdbarch
, byte_size
,
17302 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
17304 type
= make_type_with_address_space (type
, type_flags
);
17306 else if (TYPE_LENGTH (type
) != byte_size
)
17308 complaint (_("invalid pointer size %d"), byte_size
);
17310 else if (TYPE_RAW_ALIGN (type
) != alignment
)
17312 complaint (_("Invalid DW_AT_alignment"
17313 " - DIE at %s [in module %s]"),
17314 sect_offset_str (die
->sect_off
),
17315 objfile_name (cu
->per_objfile
->objfile
));
17319 /* Should we also complain about unhandled address classes? */
17323 TYPE_LENGTH (type
) = byte_size
;
17324 set_type_align (type
, alignment
);
17325 return set_die_type (die
, type
, cu
);
17328 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
17329 the user defined type vector. */
17331 static struct type
*
17332 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17335 struct type
*to_type
;
17336 struct type
*domain
;
17338 to_type
= die_type (die
, cu
);
17339 domain
= die_containing_type (die
, cu
);
17341 /* The calls above may have already set the type for this DIE. */
17342 type
= get_die_type (die
, cu
);
17346 if (check_typedef (to_type
)->code () == TYPE_CODE_METHOD
)
17347 type
= lookup_methodptr_type (to_type
);
17348 else if (check_typedef (to_type
)->code () == TYPE_CODE_FUNC
)
17350 struct type
*new_type
= alloc_type (cu
->per_objfile
->objfile
);
17352 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
17353 to_type
->fields (), to_type
->num_fields (),
17354 to_type
->has_varargs ());
17355 type
= lookup_methodptr_type (new_type
);
17358 type
= lookup_memberptr_type (to_type
, domain
);
17360 return set_die_type (die
, type
, cu
);
17363 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
17364 the user defined type vector. */
17366 static struct type
*
17367 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17368 enum type_code refcode
)
17370 struct comp_unit_head
*cu_header
= &cu
->header
;
17371 struct type
*type
, *target_type
;
17372 struct attribute
*attr
;
17374 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
17376 target_type
= die_type (die
, cu
);
17378 /* The die_type call above may have already set the type for this DIE. */
17379 type
= get_die_type (die
, cu
);
17383 type
= lookup_reference_type (target_type
, refcode
);
17384 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17385 if (attr
!= nullptr)
17387 TYPE_LENGTH (type
) = DW_UNSND (attr
);
17391 TYPE_LENGTH (type
) = cu_header
->addr_size
;
17393 maybe_set_alignment (cu
, die
, type
);
17394 return set_die_type (die
, type
, cu
);
17397 /* Add the given cv-qualifiers to the element type of the array. GCC
17398 outputs DWARF type qualifiers that apply to an array, not the
17399 element type. But GDB relies on the array element type to carry
17400 the cv-qualifiers. This mimics section 6.7.3 of the C99
17403 static struct type
*
17404 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17405 struct type
*base_type
, int cnst
, int voltl
)
17407 struct type
*el_type
, *inner_array
;
17409 base_type
= copy_type (base_type
);
17410 inner_array
= base_type
;
17412 while (TYPE_TARGET_TYPE (inner_array
)->code () == TYPE_CODE_ARRAY
)
17414 TYPE_TARGET_TYPE (inner_array
) =
17415 copy_type (TYPE_TARGET_TYPE (inner_array
));
17416 inner_array
= TYPE_TARGET_TYPE (inner_array
);
17419 el_type
= TYPE_TARGET_TYPE (inner_array
);
17420 cnst
|= TYPE_CONST (el_type
);
17421 voltl
|= TYPE_VOLATILE (el_type
);
17422 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
17424 return set_die_type (die
, base_type
, cu
);
17427 static struct type
*
17428 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17430 struct type
*base_type
, *cv_type
;
17432 base_type
= die_type (die
, cu
);
17434 /* The die_type call above may have already set the type for this DIE. */
17435 cv_type
= get_die_type (die
, cu
);
17439 /* In case the const qualifier is applied to an array type, the element type
17440 is so qualified, not the array type (section 6.7.3 of C99). */
17441 if (base_type
->code () == TYPE_CODE_ARRAY
)
17442 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
17444 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
17445 return set_die_type (die
, cv_type
, cu
);
17448 static struct type
*
17449 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17451 struct type
*base_type
, *cv_type
;
17453 base_type
= die_type (die
, cu
);
17455 /* The die_type call above may have already set the type for this DIE. */
17456 cv_type
= get_die_type (die
, cu
);
17460 /* In case the volatile qualifier is applied to an array type, the
17461 element type is so qualified, not the array type (section 6.7.3
17463 if (base_type
->code () == TYPE_CODE_ARRAY
)
17464 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
17466 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
17467 return set_die_type (die
, cv_type
, cu
);
17470 /* Handle DW_TAG_restrict_type. */
17472 static struct type
*
17473 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17475 struct type
*base_type
, *cv_type
;
17477 base_type
= die_type (die
, cu
);
17479 /* The die_type call above may have already set the type for this DIE. */
17480 cv_type
= get_die_type (die
, cu
);
17484 cv_type
= make_restrict_type (base_type
);
17485 return set_die_type (die
, cv_type
, cu
);
17488 /* Handle DW_TAG_atomic_type. */
17490 static struct type
*
17491 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17493 struct type
*base_type
, *cv_type
;
17495 base_type
= die_type (die
, cu
);
17497 /* The die_type call above may have already set the type for this DIE. */
17498 cv_type
= get_die_type (die
, cu
);
17502 cv_type
= make_atomic_type (base_type
);
17503 return set_die_type (die
, cv_type
, cu
);
17506 /* Extract all information from a DW_TAG_string_type DIE and add to
17507 the user defined type vector. It isn't really a user defined type,
17508 but it behaves like one, with other DIE's using an AT_user_def_type
17509 attribute to reference it. */
17511 static struct type
*
17512 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17514 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17515 struct gdbarch
*gdbarch
= objfile
->arch ();
17516 struct type
*type
, *range_type
, *index_type
, *char_type
;
17517 struct attribute
*attr
;
17518 struct dynamic_prop prop
;
17519 bool length_is_constant
= true;
17522 /* There are a couple of places where bit sizes might be made use of
17523 when parsing a DW_TAG_string_type, however, no producer that we know
17524 of make use of these. Handling bit sizes that are a multiple of the
17525 byte size is easy enough, but what about other bit sizes? Lets deal
17526 with that problem when we have to. Warn about these attributes being
17527 unsupported, then parse the type and ignore them like we always
17529 if (dwarf2_attr (die
, DW_AT_bit_size
, cu
) != nullptr
17530 || dwarf2_attr (die
, DW_AT_string_length_bit_size
, cu
) != nullptr)
17532 static bool warning_printed
= false;
17533 if (!warning_printed
)
17535 warning (_("DW_AT_bit_size and DW_AT_string_length_bit_size not "
17536 "currently supported on DW_TAG_string_type."));
17537 warning_printed
= true;
17541 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
17542 if (attr
!= nullptr && !attr
->form_is_constant ())
17544 /* The string length describes the location at which the length of
17545 the string can be found. The size of the length field can be
17546 specified with one of the attributes below. */
17547 struct type
*prop_type
;
17548 struct attribute
*len
17549 = dwarf2_attr (die
, DW_AT_string_length_byte_size
, cu
);
17550 if (len
== nullptr)
17551 len
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17552 if (len
!= nullptr && len
->form_is_constant ())
17554 /* Pass 0 as the default as we know this attribute is constant
17555 and the default value will not be returned. */
17556 LONGEST sz
= len
->constant_value (0);
17557 prop_type
= cu
->per_objfile
->int_type (sz
, true);
17561 /* If the size is not specified then we assume it is the size of
17562 an address on this target. */
17563 prop_type
= cu
->addr_sized_int_type (true);
17566 /* Convert the attribute into a dynamic property. */
17567 if (!attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
17570 length_is_constant
= false;
17572 else if (attr
!= nullptr)
17574 /* This DW_AT_string_length just contains the length with no
17575 indirection. There's no need to create a dynamic property in this
17576 case. Pass 0 for the default value as we know it will not be
17577 returned in this case. */
17578 length
= attr
->constant_value (0);
17580 else if ((attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
)) != nullptr)
17582 /* We don't currently support non-constant byte sizes for strings. */
17583 length
= attr
->constant_value (1);
17587 /* Use 1 as a fallback length if we have nothing else. */
17591 index_type
= objfile_type (objfile
)->builtin_int
;
17592 if (length_is_constant
)
17593 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17596 struct dynamic_prop low_bound
;
17598 low_bound
.set_const_val (1);
17599 range_type
= create_range_type (NULL
, index_type
, &low_bound
, &prop
, 0);
17601 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
17602 type
= create_string_type (NULL
, char_type
, range_type
);
17604 return set_die_type (die
, type
, cu
);
17607 /* Assuming that DIE corresponds to a function, returns nonzero
17608 if the function is prototyped. */
17611 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
17613 struct attribute
*attr
;
17615 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
17616 if (attr
&& (DW_UNSND (attr
) != 0))
17619 /* The DWARF standard implies that the DW_AT_prototyped attribute
17620 is only meaningful for C, but the concept also extends to other
17621 languages that allow unprototyped functions (Eg: Objective C).
17622 For all other languages, assume that functions are always
17624 if (cu
->language
!= language_c
17625 && cu
->language
!= language_objc
17626 && cu
->language
!= language_opencl
)
17629 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17630 prototyped and unprototyped functions; default to prototyped,
17631 since that is more common in modern code (and RealView warns
17632 about unprototyped functions). */
17633 if (producer_is_realview (cu
->producer
))
17639 /* Handle DIES due to C code like:
17643 int (*funcp)(int a, long l);
17647 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17649 static struct type
*
17650 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17652 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17653 struct type
*type
; /* Type that this function returns. */
17654 struct type
*ftype
; /* Function that returns above type. */
17655 struct attribute
*attr
;
17657 type
= die_type (die
, cu
);
17659 /* The die_type call above may have already set the type for this DIE. */
17660 ftype
= get_die_type (die
, cu
);
17664 ftype
= lookup_function_type (type
);
17666 if (prototyped_function_p (die
, cu
))
17667 ftype
->set_is_prototyped (true);
17669 /* Store the calling convention in the type if it's available in
17670 the subroutine die. Otherwise set the calling convention to
17671 the default value DW_CC_normal. */
17672 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17673 if (attr
!= nullptr
17674 && is_valid_DW_AT_calling_convention_for_subroutine (DW_UNSND (attr
)))
17675 TYPE_CALLING_CONVENTION (ftype
)
17676 = (enum dwarf_calling_convention
) (DW_UNSND (attr
));
17677 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17678 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17680 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17682 /* Record whether the function returns normally to its caller or not
17683 if the DWARF producer set that information. */
17684 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17685 if (attr
&& (DW_UNSND (attr
) != 0))
17686 TYPE_NO_RETURN (ftype
) = 1;
17688 /* We need to add the subroutine type to the die immediately so
17689 we don't infinitely recurse when dealing with parameters
17690 declared as the same subroutine type. */
17691 set_die_type (die
, ftype
, cu
);
17693 if (die
->child
!= NULL
)
17695 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17696 struct die_info
*child_die
;
17697 int nparams
, iparams
;
17699 /* Count the number of parameters.
17700 FIXME: GDB currently ignores vararg functions, but knows about
17701 vararg member functions. */
17703 child_die
= die
->child
;
17704 while (child_die
&& child_die
->tag
)
17706 if (child_die
->tag
== DW_TAG_formal_parameter
)
17708 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17709 ftype
->set_has_varargs (true);
17711 child_die
= child_die
->sibling
;
17714 /* Allocate storage for parameters and fill them in. */
17715 ftype
->set_num_fields (nparams
);
17717 ((struct field
*) TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
)));
17719 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17720 even if we error out during the parameters reading below. */
17721 for (iparams
= 0; iparams
< nparams
; iparams
++)
17722 ftype
->field (iparams
).set_type (void_type
);
17725 child_die
= die
->child
;
17726 while (child_die
&& child_die
->tag
)
17728 if (child_die
->tag
== DW_TAG_formal_parameter
)
17730 struct type
*arg_type
;
17732 /* DWARF version 2 has no clean way to discern C++
17733 static and non-static member functions. G++ helps
17734 GDB by marking the first parameter for non-static
17735 member functions (which is the this pointer) as
17736 artificial. We pass this information to
17737 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17739 DWARF version 3 added DW_AT_object_pointer, which GCC
17740 4.5 does not yet generate. */
17741 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17742 if (attr
!= nullptr)
17743 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17745 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17746 arg_type
= die_type (child_die
, cu
);
17748 /* RealView does not mark THIS as const, which the testsuite
17749 expects. GCC marks THIS as const in method definitions,
17750 but not in the class specifications (GCC PR 43053). */
17751 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17752 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17755 struct dwarf2_cu
*arg_cu
= cu
;
17756 const char *name
= dwarf2_name (child_die
, cu
);
17758 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17759 if (attr
!= nullptr)
17761 /* If the compiler emits this, use it. */
17762 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17765 else if (name
&& strcmp (name
, "this") == 0)
17766 /* Function definitions will have the argument names. */
17768 else if (name
== NULL
&& iparams
== 0)
17769 /* Declarations may not have the names, so like
17770 elsewhere in GDB, assume an artificial first
17771 argument is "this". */
17775 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17779 ftype
->field (iparams
).set_type (arg_type
);
17782 child_die
= child_die
->sibling
;
17789 static struct type
*
17790 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17792 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17793 const char *name
= NULL
;
17794 struct type
*this_type
, *target_type
;
17796 name
= dwarf2_full_name (NULL
, die
, cu
);
17797 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17798 this_type
->set_target_is_stub (true);
17799 set_die_type (die
, this_type
, cu
);
17800 target_type
= die_type (die
, cu
);
17801 if (target_type
!= this_type
)
17802 TYPE_TARGET_TYPE (this_type
) = target_type
;
17805 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17806 spec and cause infinite loops in GDB. */
17807 complaint (_("Self-referential DW_TAG_typedef "
17808 "- DIE at %s [in module %s]"),
17809 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17810 TYPE_TARGET_TYPE (this_type
) = NULL
;
17814 /* Gcc-7 and before supports -feliminate-dwarf2-dups, which generates
17815 anonymous typedefs, which is, strictly speaking, invalid DWARF.
17816 Handle these by just returning the target type, rather than
17817 constructing an anonymous typedef type and trying to handle this
17819 set_die_type (die
, target_type
, cu
);
17820 return target_type
;
17825 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17826 (which may be different from NAME) to the architecture back-end to allow
17827 it to guess the correct format if necessary. */
17829 static struct type
*
17830 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17831 const char *name_hint
, enum bfd_endian byte_order
)
17833 struct gdbarch
*gdbarch
= objfile
->arch ();
17834 const struct floatformat
**format
;
17837 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17839 type
= init_float_type (objfile
, bits
, name
, format
, byte_order
);
17841 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17846 /* Allocate an integer type of size BITS and name NAME. */
17848 static struct type
*
17849 dwarf2_init_integer_type (struct dwarf2_cu
*cu
, struct objfile
*objfile
,
17850 int bits
, int unsigned_p
, const char *name
)
17854 /* Versions of Intel's C Compiler generate an integer type called "void"
17855 instead of using DW_TAG_unspecified_type. This has been seen on
17856 at least versions 14, 17, and 18. */
17857 if (bits
== 0 && producer_is_icc (cu
) && name
!= nullptr
17858 && strcmp (name
, "void") == 0)
17859 type
= objfile_type (objfile
)->builtin_void
;
17861 type
= init_integer_type (objfile
, bits
, unsigned_p
, name
);
17866 /* Initialise and return a floating point type of size BITS suitable for
17867 use as a component of a complex number. The NAME_HINT is passed through
17868 when initialising the floating point type and is the name of the complex
17871 As DWARF doesn't currently provide an explicit name for the components
17872 of a complex number, but it can be helpful to have these components
17873 named, we try to select a suitable name based on the size of the
17875 static struct type
*
17876 dwarf2_init_complex_target_type (struct dwarf2_cu
*cu
,
17877 struct objfile
*objfile
,
17878 int bits
, const char *name_hint
,
17879 enum bfd_endian byte_order
)
17881 gdbarch
*gdbarch
= objfile
->arch ();
17882 struct type
*tt
= nullptr;
17884 /* Try to find a suitable floating point builtin type of size BITS.
17885 We're going to use the name of this type as the name for the complex
17886 target type that we are about to create. */
17887 switch (cu
->language
)
17889 case language_fortran
:
17893 tt
= builtin_f_type (gdbarch
)->builtin_real
;
17896 tt
= builtin_f_type (gdbarch
)->builtin_real_s8
;
17898 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17900 tt
= builtin_f_type (gdbarch
)->builtin_real_s16
;
17908 tt
= builtin_type (gdbarch
)->builtin_float
;
17911 tt
= builtin_type (gdbarch
)->builtin_double
;
17913 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17915 tt
= builtin_type (gdbarch
)->builtin_long_double
;
17921 /* If the type we found doesn't match the size we were looking for, then
17922 pretend we didn't find a type at all, the complex target type we
17923 create will then be nameless. */
17924 if (tt
!= nullptr && TYPE_LENGTH (tt
) * TARGET_CHAR_BIT
!= bits
)
17927 const char *name
= (tt
== nullptr) ? nullptr : tt
->name ();
17928 return dwarf2_init_float_type (objfile
, bits
, name
, name_hint
, byte_order
);
17931 /* Find a representation of a given base type and install
17932 it in the TYPE field of the die. */
17934 static struct type
*
17935 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17937 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
17939 struct attribute
*attr
;
17940 int encoding
= 0, bits
= 0;
17944 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17945 if (attr
!= nullptr)
17946 encoding
= DW_UNSND (attr
);
17947 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17948 if (attr
!= nullptr)
17949 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17950 name
= dwarf2_name (die
, cu
);
17952 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
17954 arch
= objfile
->arch ();
17955 enum bfd_endian byte_order
= gdbarch_byte_order (arch
);
17957 attr
= dwarf2_attr (die
, DW_AT_endianity
, cu
);
17960 int endianity
= DW_UNSND (attr
);
17965 byte_order
= BFD_ENDIAN_BIG
;
17967 case DW_END_little
:
17968 byte_order
= BFD_ENDIAN_LITTLE
;
17971 complaint (_("DW_AT_endianity has unrecognized value %d"), endianity
);
17978 case DW_ATE_address
:
17979 /* Turn DW_ATE_address into a void * pointer. */
17980 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17981 type
= init_pointer_type (objfile
, bits
, name
, type
);
17983 case DW_ATE_boolean
:
17984 type
= init_boolean_type (objfile
, bits
, 1, name
);
17986 case DW_ATE_complex_float
:
17987 type
= dwarf2_init_complex_target_type (cu
, objfile
, bits
/ 2, name
,
17989 if (type
->code () == TYPE_CODE_ERROR
)
17991 if (name
== nullptr)
17993 struct obstack
*obstack
17994 = &cu
->per_objfile
->objfile
->objfile_obstack
;
17995 name
= obconcat (obstack
, "_Complex ", type
->name (),
17998 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
18001 type
= init_complex_type (name
, type
);
18003 case DW_ATE_decimal_float
:
18004 type
= init_decfloat_type (objfile
, bits
, name
);
18007 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
, byte_order
);
18009 case DW_ATE_signed
:
18010 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
18012 case DW_ATE_unsigned
:
18013 if (cu
->language
== language_fortran
18015 && startswith (name
, "character("))
18016 type
= init_character_type (objfile
, bits
, 1, name
);
18018 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
18020 case DW_ATE_signed_char
:
18021 if (cu
->language
== language_ada
|| cu
->language
== language_m2
18022 || cu
->language
== language_pascal
18023 || cu
->language
== language_fortran
)
18024 type
= init_character_type (objfile
, bits
, 0, name
);
18026 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
18028 case DW_ATE_unsigned_char
:
18029 if (cu
->language
== language_ada
|| cu
->language
== language_m2
18030 || cu
->language
== language_pascal
18031 || cu
->language
== language_fortran
18032 || cu
->language
== language_rust
)
18033 type
= init_character_type (objfile
, bits
, 1, name
);
18035 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
18040 type
= builtin_type (arch
)->builtin_char16
;
18041 else if (bits
== 32)
18042 type
= builtin_type (arch
)->builtin_char32
;
18045 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
18047 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
18049 return set_die_type (die
, type
, cu
);
18054 complaint (_("unsupported DW_AT_encoding: '%s'"),
18055 dwarf_type_encoding_name (encoding
));
18056 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
18060 if (name
&& strcmp (name
, "char") == 0)
18061 type
->set_has_no_signedness (true);
18063 maybe_set_alignment (cu
, die
, type
);
18065 type
->set_endianity_is_not_default (gdbarch_byte_order (arch
) != byte_order
);
18067 if (TYPE_SPECIFIC_FIELD (type
) == TYPE_SPECIFIC_INT
)
18069 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
18070 if (attr
!= nullptr && DW_UNSND (attr
) <= 8 * TYPE_LENGTH (type
))
18072 unsigned real_bit_size
= DW_UNSND (attr
);
18073 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
18074 /* Only use the attributes if they make sense together. */
18075 if (attr
== nullptr
18076 || DW_UNSND (attr
) + real_bit_size
<= 8 * TYPE_LENGTH (type
))
18078 TYPE_MAIN_TYPE (type
)->type_specific
.int_stuff
.bit_size
18080 if (attr
!= nullptr)
18081 TYPE_MAIN_TYPE (type
)->type_specific
.int_stuff
.bit_offset
18087 return set_die_type (die
, type
, cu
);
18090 /* Parse dwarf attribute if it's a block, reference or constant and put the
18091 resulting value of the attribute into struct bound_prop.
18092 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
18095 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
18096 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
,
18097 struct type
*default_type
)
18099 struct dwarf2_property_baton
*baton
;
18100 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
18101 struct objfile
*objfile
= per_objfile
->objfile
;
18102 struct obstack
*obstack
= &objfile
->objfile_obstack
;
18104 gdb_assert (default_type
!= NULL
);
18106 if (attr
== NULL
|| prop
== NULL
)
18109 if (attr
->form_is_block ())
18111 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
18112 baton
->property_type
= default_type
;
18113 baton
->locexpr
.per_cu
= cu
->per_cu
;
18114 baton
->locexpr
.per_objfile
= per_objfile
;
18116 struct dwarf_block
*block
= attr
->as_block ();
18117 baton
->locexpr
.size
= block
->size
;
18118 baton
->locexpr
.data
= block
->data
;
18119 switch (attr
->name
)
18121 case DW_AT_string_length
:
18122 baton
->locexpr
.is_reference
= true;
18125 baton
->locexpr
.is_reference
= false;
18129 prop
->set_locexpr (baton
);
18130 gdb_assert (prop
->baton () != NULL
);
18132 else if (attr
->form_is_ref ())
18134 struct dwarf2_cu
*target_cu
= cu
;
18135 struct die_info
*target_die
;
18136 struct attribute
*target_attr
;
18138 target_die
= follow_die_ref (die
, attr
, &target_cu
);
18139 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
18140 if (target_attr
== NULL
)
18141 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
18143 if (target_attr
== NULL
)
18146 switch (target_attr
->name
)
18148 case DW_AT_location
:
18149 if (target_attr
->form_is_section_offset ())
18151 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
18152 baton
->property_type
= die_type (target_die
, target_cu
);
18153 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
18154 prop
->set_loclist (baton
);
18155 gdb_assert (prop
->baton () != NULL
);
18157 else if (target_attr
->form_is_block ())
18159 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
18160 baton
->property_type
= die_type (target_die
, target_cu
);
18161 baton
->locexpr
.per_cu
= cu
->per_cu
;
18162 baton
->locexpr
.per_objfile
= per_objfile
;
18163 struct dwarf_block
*block
= target_attr
->as_block ();
18164 baton
->locexpr
.size
= block
->size
;
18165 baton
->locexpr
.data
= block
->data
;
18166 baton
->locexpr
.is_reference
= true;
18167 prop
->set_locexpr (baton
);
18168 gdb_assert (prop
->baton () != NULL
);
18172 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18173 "dynamic property");
18177 case DW_AT_data_member_location
:
18181 if (!handle_data_member_location (target_die
, target_cu
,
18185 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
18186 baton
->property_type
= read_type_die (target_die
->parent
,
18188 baton
->offset_info
.offset
= offset
;
18189 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
18190 prop
->set_addr_offset (baton
);
18195 else if (attr
->form_is_constant ())
18196 prop
->set_const_val (attr
->constant_value (0));
18199 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
18200 dwarf2_name (die
, cu
));
18210 dwarf2_per_objfile::int_type (int size_in_bytes
, bool unsigned_p
) const
18212 struct type
*int_type
;
18214 /* Helper macro to examine the various builtin types. */
18215 #define TRY_TYPE(F) \
18216 int_type = (unsigned_p \
18217 ? objfile_type (objfile)->builtin_unsigned_ ## F \
18218 : objfile_type (objfile)->builtin_ ## F); \
18219 if (int_type != NULL && TYPE_LENGTH (int_type) == size_in_bytes) \
18226 TRY_TYPE (long_long
);
18230 gdb_assert_not_reached ("unable to find suitable integer type");
18236 dwarf2_cu::addr_sized_int_type (bool unsigned_p
) const
18238 int addr_size
= this->per_cu
->addr_size ();
18239 return this->per_objfile
->int_type (addr_size
, unsigned_p
);
18242 /* Read the DW_AT_type attribute for a sub-range. If this attribute is not
18243 present (which is valid) then compute the default type based on the
18244 compilation units address size. */
18246 static struct type
*
18247 read_subrange_index_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18249 struct type
*index_type
= die_type (die
, cu
);
18251 /* Dwarf-2 specifications explicitly allows to create subrange types
18252 without specifying a base type.
18253 In that case, the base type must be set to the type of
18254 the lower bound, upper bound or count, in that order, if any of these
18255 three attributes references an object that has a type.
18256 If no base type is found, the Dwarf-2 specifications say that
18257 a signed integer type of size equal to the size of an address should
18259 For the following C code: `extern char gdb_int [];'
18260 GCC produces an empty range DIE.
18261 FIXME: muller/2010-05-28: Possible references to object for low bound,
18262 high bound or count are not yet handled by this code. */
18263 if (index_type
->code () == TYPE_CODE_VOID
)
18264 index_type
= cu
->addr_sized_int_type (false);
18269 /* Read the given DW_AT_subrange DIE. */
18271 static struct type
*
18272 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18274 struct type
*base_type
, *orig_base_type
;
18275 struct type
*range_type
;
18276 struct attribute
*attr
;
18277 struct dynamic_prop low
, high
;
18278 int low_default_is_valid
;
18279 int high_bound_is_count
= 0;
18281 ULONGEST negative_mask
;
18283 orig_base_type
= read_subrange_index_type (die
, cu
);
18285 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
18286 whereas the real type might be. So, we use ORIG_BASE_TYPE when
18287 creating the range type, but we use the result of check_typedef
18288 when examining properties of the type. */
18289 base_type
= check_typedef (orig_base_type
);
18291 /* The die_type call above may have already set the type for this DIE. */
18292 range_type
= get_die_type (die
, cu
);
18296 high
.set_const_val (0);
18298 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
18299 omitting DW_AT_lower_bound. */
18300 switch (cu
->language
)
18303 case language_cplus
:
18304 low
.set_const_val (0);
18305 low_default_is_valid
= 1;
18307 case language_fortran
:
18308 low
.set_const_val (1);
18309 low_default_is_valid
= 1;
18312 case language_objc
:
18313 case language_rust
:
18314 low
.set_const_val (0);
18315 low_default_is_valid
= (cu
->header
.version
>= 4);
18319 case language_pascal
:
18320 low
.set_const_val (1);
18321 low_default_is_valid
= (cu
->header
.version
>= 4);
18324 low
.set_const_val (0);
18325 low_default_is_valid
= 0;
18329 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
18330 if (attr
!= nullptr)
18331 attr_to_dynamic_prop (attr
, die
, cu
, &low
, base_type
);
18332 else if (!low_default_is_valid
)
18333 complaint (_("Missing DW_AT_lower_bound "
18334 "- DIE at %s [in module %s]"),
18335 sect_offset_str (die
->sect_off
),
18336 objfile_name (cu
->per_objfile
->objfile
));
18338 struct attribute
*attr_ub
, *attr_count
;
18339 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
18340 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
18342 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
18343 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
, base_type
))
18345 /* If bounds are constant do the final calculation here. */
18346 if (low
.kind () == PROP_CONST
&& high
.kind () == PROP_CONST
)
18347 high
.set_const_val (low
.const_val () + high
.const_val () - 1);
18349 high_bound_is_count
= 1;
18353 if (attr_ub
!= NULL
)
18354 complaint (_("Unresolved DW_AT_upper_bound "
18355 "- DIE at %s [in module %s]"),
18356 sect_offset_str (die
->sect_off
),
18357 objfile_name (cu
->per_objfile
->objfile
));
18358 if (attr_count
!= NULL
)
18359 complaint (_("Unresolved DW_AT_count "
18360 "- DIE at %s [in module %s]"),
18361 sect_offset_str (die
->sect_off
),
18362 objfile_name (cu
->per_objfile
->objfile
));
18367 struct attribute
*bias_attr
= dwarf2_attr (die
, DW_AT_GNU_bias
, cu
);
18368 if (bias_attr
!= nullptr && bias_attr
->form_is_constant ())
18369 bias
= bias_attr
->constant_value (0);
18371 /* Normally, the DWARF producers are expected to use a signed
18372 constant form (Eg. DW_FORM_sdata) to express negative bounds.
18373 But this is unfortunately not always the case, as witnessed
18374 with GCC, for instance, where the ambiguous DW_FORM_dataN form
18375 is used instead. To work around that ambiguity, we treat
18376 the bounds as signed, and thus sign-extend their values, when
18377 the base type is signed. */
18379 -((ULONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
18380 if (low
.kind () == PROP_CONST
18381 && !base_type
->is_unsigned () && (low
.const_val () & negative_mask
))
18382 low
.set_const_val (low
.const_val () | negative_mask
);
18383 if (high
.kind () == PROP_CONST
18384 && !base_type
->is_unsigned () && (high
.const_val () & negative_mask
))
18385 high
.set_const_val (high
.const_val () | negative_mask
);
18387 /* Check for bit and byte strides. */
18388 struct dynamic_prop byte_stride_prop
;
18389 attribute
*attr_byte_stride
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
18390 if (attr_byte_stride
!= nullptr)
18392 struct type
*prop_type
= cu
->addr_sized_int_type (false);
18393 attr_to_dynamic_prop (attr_byte_stride
, die
, cu
, &byte_stride_prop
,
18397 struct dynamic_prop bit_stride_prop
;
18398 attribute
*attr_bit_stride
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
18399 if (attr_bit_stride
!= nullptr)
18401 /* It only makes sense to have either a bit or byte stride. */
18402 if (attr_byte_stride
!= nullptr)
18404 complaint (_("Found DW_AT_bit_stride and DW_AT_byte_stride "
18405 "- DIE at %s [in module %s]"),
18406 sect_offset_str (die
->sect_off
),
18407 objfile_name (cu
->per_objfile
->objfile
));
18408 attr_bit_stride
= nullptr;
18412 struct type
*prop_type
= cu
->addr_sized_int_type (false);
18413 attr_to_dynamic_prop (attr_bit_stride
, die
, cu
, &bit_stride_prop
,
18418 if (attr_byte_stride
!= nullptr
18419 || attr_bit_stride
!= nullptr)
18421 bool byte_stride_p
= (attr_byte_stride
!= nullptr);
18422 struct dynamic_prop
*stride
18423 = byte_stride_p
? &byte_stride_prop
: &bit_stride_prop
;
18426 = create_range_type_with_stride (NULL
, orig_base_type
, &low
,
18427 &high
, bias
, stride
, byte_stride_p
);
18430 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
, bias
);
18432 if (high_bound_is_count
)
18433 range_type
->bounds ()->flag_upper_bound_is_count
= 1;
18435 /* Ada expects an empty array on no boundary attributes. */
18436 if (attr
== NULL
&& cu
->language
!= language_ada
)
18437 range_type
->bounds ()->high
.set_undefined ();
18439 name
= dwarf2_name (die
, cu
);
18441 range_type
->set_name (name
);
18443 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
18444 if (attr
!= nullptr)
18445 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
18447 maybe_set_alignment (cu
, die
, range_type
);
18449 set_die_type (die
, range_type
, cu
);
18451 /* set_die_type should be already done. */
18452 set_descriptive_type (range_type
, die
, cu
);
18457 static struct type
*
18458 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18462 type
= init_type (cu
->per_objfile
->objfile
, TYPE_CODE_VOID
, 0, NULL
);
18463 type
->set_name (dwarf2_name (die
, cu
));
18465 /* In Ada, an unspecified type is typically used when the description
18466 of the type is deferred to a different unit. When encountering
18467 such a type, we treat it as a stub, and try to resolve it later on,
18469 if (cu
->language
== language_ada
)
18470 type
->set_is_stub (true);
18472 return set_die_type (die
, type
, cu
);
18475 /* Read a single die and all its descendents. Set the die's sibling
18476 field to NULL; set other fields in the die correctly, and set all
18477 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
18478 location of the info_ptr after reading all of those dies. PARENT
18479 is the parent of the die in question. */
18481 static struct die_info
*
18482 read_die_and_children (const struct die_reader_specs
*reader
,
18483 const gdb_byte
*info_ptr
,
18484 const gdb_byte
**new_info_ptr
,
18485 struct die_info
*parent
)
18487 struct die_info
*die
;
18488 const gdb_byte
*cur_ptr
;
18490 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, 0);
18493 *new_info_ptr
= cur_ptr
;
18496 store_in_ref_table (die
, reader
->cu
);
18498 if (die
->has_children
)
18499 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
18503 *new_info_ptr
= cur_ptr
;
18506 die
->sibling
= NULL
;
18507 die
->parent
= parent
;
18511 /* Read a die, all of its descendents, and all of its siblings; set
18512 all of the fields of all of the dies correctly. Arguments are as
18513 in read_die_and_children. */
18515 static struct die_info
*
18516 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
18517 const gdb_byte
*info_ptr
,
18518 const gdb_byte
**new_info_ptr
,
18519 struct die_info
*parent
)
18521 struct die_info
*first_die
, *last_sibling
;
18522 const gdb_byte
*cur_ptr
;
18524 cur_ptr
= info_ptr
;
18525 first_die
= last_sibling
= NULL
;
18529 struct die_info
*die
18530 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
18534 *new_info_ptr
= cur_ptr
;
18541 last_sibling
->sibling
= die
;
18543 last_sibling
= die
;
18547 /* Read a die, all of its descendents, and all of its siblings; set
18548 all of the fields of all of the dies correctly. Arguments are as
18549 in read_die_and_children.
18550 This the main entry point for reading a DIE and all its children. */
18552 static struct die_info
*
18553 read_die_and_siblings (const struct die_reader_specs
*reader
,
18554 const gdb_byte
*info_ptr
,
18555 const gdb_byte
**new_info_ptr
,
18556 struct die_info
*parent
)
18558 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
18559 new_info_ptr
, parent
);
18561 if (dwarf_die_debug
)
18563 fprintf_unfiltered (gdb_stdlog
,
18564 "Read die from %s@0x%x of %s:\n",
18565 reader
->die_section
->get_name (),
18566 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18567 bfd_get_filename (reader
->abfd
));
18568 dump_die (die
, dwarf_die_debug
);
18574 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
18576 The caller is responsible for filling in the extra attributes
18577 and updating (*DIEP)->num_attrs.
18578 Set DIEP to point to a newly allocated die with its information,
18579 except for its child, sibling, and parent fields. */
18581 static const gdb_byte
*
18582 read_full_die_1 (const struct die_reader_specs
*reader
,
18583 struct die_info
**diep
, const gdb_byte
*info_ptr
,
18584 int num_extra_attrs
)
18586 unsigned int abbrev_number
, bytes_read
, i
;
18587 struct abbrev_info
*abbrev
;
18588 struct die_info
*die
;
18589 struct dwarf2_cu
*cu
= reader
->cu
;
18590 bfd
*abfd
= reader
->abfd
;
18592 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
18593 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18594 info_ptr
+= bytes_read
;
18595 if (!abbrev_number
)
18601 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
18603 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
18605 bfd_get_filename (abfd
));
18607 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
18608 die
->sect_off
= sect_off
;
18609 die
->tag
= abbrev
->tag
;
18610 die
->abbrev
= abbrev_number
;
18611 die
->has_children
= abbrev
->has_children
;
18613 /* Make the result usable.
18614 The caller needs to update num_attrs after adding the extra
18616 die
->num_attrs
= abbrev
->num_attrs
;
18618 bool any_need_reprocess
= false;
18619 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
18621 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
18623 if (die
->attrs
[i
].requires_reprocessing_p ())
18624 any_need_reprocess
= true;
18627 struct attribute
*attr
= die
->attr (DW_AT_str_offsets_base
);
18628 if (attr
!= nullptr)
18629 cu
->str_offsets_base
= DW_UNSND (attr
);
18631 attr
= die
->attr (DW_AT_loclists_base
);
18632 if (attr
!= nullptr)
18633 cu
->loclist_base
= DW_UNSND (attr
);
18635 auto maybe_addr_base
= die
->addr_base ();
18636 if (maybe_addr_base
.has_value ())
18637 cu
->addr_base
= *maybe_addr_base
;
18639 attr
= die
->attr (DW_AT_rnglists_base
);
18640 if (attr
!= nullptr)
18641 cu
->ranges_base
= DW_UNSND (attr
);
18643 if (any_need_reprocess
)
18645 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
18647 if (die
->attrs
[i
].requires_reprocessing_p ())
18648 read_attribute_reprocess (reader
, &die
->attrs
[i
], die
->tag
);
18655 /* Read a die and all its attributes.
18656 Set DIEP to point to a newly allocated die with its information,
18657 except for its child, sibling, and parent fields. */
18659 static const gdb_byte
*
18660 read_full_die (const struct die_reader_specs
*reader
,
18661 struct die_info
**diep
, const gdb_byte
*info_ptr
)
18663 const gdb_byte
*result
;
18665 result
= read_full_die_1 (reader
, diep
, info_ptr
, 0);
18667 if (dwarf_die_debug
)
18669 fprintf_unfiltered (gdb_stdlog
,
18670 "Read die from %s@0x%x of %s:\n",
18671 reader
->die_section
->get_name (),
18672 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18673 bfd_get_filename (reader
->abfd
));
18674 dump_die (*diep
, dwarf_die_debug
);
18681 /* Returns nonzero if TAG represents a type that we might generate a partial
18685 is_type_tag_for_partial (int tag
)
18690 /* Some types that would be reasonable to generate partial symbols for,
18691 that we don't at present. */
18692 case DW_TAG_array_type
:
18693 case DW_TAG_file_type
:
18694 case DW_TAG_ptr_to_member_type
:
18695 case DW_TAG_set_type
:
18696 case DW_TAG_string_type
:
18697 case DW_TAG_subroutine_type
:
18699 case DW_TAG_base_type
:
18700 case DW_TAG_class_type
:
18701 case DW_TAG_interface_type
:
18702 case DW_TAG_enumeration_type
:
18703 case DW_TAG_structure_type
:
18704 case DW_TAG_subrange_type
:
18705 case DW_TAG_typedef
:
18706 case DW_TAG_union_type
:
18713 /* Load all DIEs that are interesting for partial symbols into memory. */
18715 static struct partial_die_info
*
18716 load_partial_dies (const struct die_reader_specs
*reader
,
18717 const gdb_byte
*info_ptr
, int building_psymtab
)
18719 struct dwarf2_cu
*cu
= reader
->cu
;
18720 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
18721 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18722 unsigned int bytes_read
;
18723 unsigned int load_all
= 0;
18724 int nesting_level
= 1;
18729 gdb_assert (cu
->per_cu
!= NULL
);
18730 if (cu
->per_cu
->load_all_dies
)
18734 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18738 &cu
->comp_unit_obstack
,
18739 hashtab_obstack_allocate
,
18740 dummy_obstack_deallocate
);
18744 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18746 /* A NULL abbrev means the end of a series of children. */
18747 if (abbrev
== NULL
)
18749 if (--nesting_level
== 0)
18752 info_ptr
+= bytes_read
;
18753 last_die
= parent_die
;
18754 parent_die
= parent_die
->die_parent
;
18758 /* Check for template arguments. We never save these; if
18759 they're seen, we just mark the parent, and go on our way. */
18760 if (parent_die
!= NULL
18761 && cu
->language
== language_cplus
18762 && (abbrev
->tag
== DW_TAG_template_type_param
18763 || abbrev
->tag
== DW_TAG_template_value_param
))
18765 parent_die
->has_template_arguments
= 1;
18769 /* We don't need a partial DIE for the template argument. */
18770 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18775 /* We only recurse into c++ subprograms looking for template arguments.
18776 Skip their other children. */
18778 && cu
->language
== language_cplus
18779 && parent_die
!= NULL
18780 && parent_die
->tag
== DW_TAG_subprogram
18781 && abbrev
->tag
!= DW_TAG_inlined_subroutine
)
18783 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18787 /* Check whether this DIE is interesting enough to save. Normally
18788 we would not be interested in members here, but there may be
18789 later variables referencing them via DW_AT_specification (for
18790 static members). */
18792 && !is_type_tag_for_partial (abbrev
->tag
)
18793 && abbrev
->tag
!= DW_TAG_constant
18794 && abbrev
->tag
!= DW_TAG_enumerator
18795 && abbrev
->tag
!= DW_TAG_subprogram
18796 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18797 && abbrev
->tag
!= DW_TAG_lexical_block
18798 && abbrev
->tag
!= DW_TAG_variable
18799 && abbrev
->tag
!= DW_TAG_namespace
18800 && abbrev
->tag
!= DW_TAG_module
18801 && abbrev
->tag
!= DW_TAG_member
18802 && abbrev
->tag
!= DW_TAG_imported_unit
18803 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18805 /* Otherwise we skip to the next sibling, if any. */
18806 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18810 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18813 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18815 /* This two-pass algorithm for processing partial symbols has a
18816 high cost in cache pressure. Thus, handle some simple cases
18817 here which cover the majority of C partial symbols. DIEs
18818 which neither have specification tags in them, nor could have
18819 specification tags elsewhere pointing at them, can simply be
18820 processed and discarded.
18822 This segment is also optional; scan_partial_symbols and
18823 add_partial_symbol will handle these DIEs if we chain
18824 them in normally. When compilers which do not emit large
18825 quantities of duplicate debug information are more common,
18826 this code can probably be removed. */
18828 /* Any complete simple types at the top level (pretty much all
18829 of them, for a language without namespaces), can be processed
18831 if (parent_die
== NULL
18832 && pdi
.has_specification
== 0
18833 && pdi
.is_declaration
== 0
18834 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18835 || pdi
.tag
== DW_TAG_base_type
18836 || pdi
.tag
== DW_TAG_subrange_type
))
18838 if (building_psymtab
&& pdi
.raw_name
!= NULL
)
18839 add_partial_symbol (&pdi
, cu
);
18841 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18845 /* The exception for DW_TAG_typedef with has_children above is
18846 a workaround of GCC PR debug/47510. In the case of this complaint
18847 type_name_or_error will error on such types later.
18849 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18850 it could not find the child DIEs referenced later, this is checked
18851 above. In correct DWARF DW_TAG_typedef should have no children. */
18853 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18854 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18855 "- DIE at %s [in module %s]"),
18856 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18858 /* If we're at the second level, and we're an enumerator, and
18859 our parent has no specification (meaning possibly lives in a
18860 namespace elsewhere), then we can add the partial symbol now
18861 instead of queueing it. */
18862 if (pdi
.tag
== DW_TAG_enumerator
18863 && parent_die
!= NULL
18864 && parent_die
->die_parent
== NULL
18865 && parent_die
->tag
== DW_TAG_enumeration_type
18866 && parent_die
->has_specification
== 0)
18868 if (pdi
.raw_name
== NULL
)
18869 complaint (_("malformed enumerator DIE ignored"));
18870 else if (building_psymtab
)
18871 add_partial_symbol (&pdi
, cu
);
18873 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18877 struct partial_die_info
*part_die
18878 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18880 /* We'll save this DIE so link it in. */
18881 part_die
->die_parent
= parent_die
;
18882 part_die
->die_sibling
= NULL
;
18883 part_die
->die_child
= NULL
;
18885 if (last_die
&& last_die
== parent_die
)
18886 last_die
->die_child
= part_die
;
18888 last_die
->die_sibling
= part_die
;
18890 last_die
= part_die
;
18892 if (first_die
== NULL
)
18893 first_die
= part_die
;
18895 /* Maybe add the DIE to the hash table. Not all DIEs that we
18896 find interesting need to be in the hash table, because we
18897 also have the parent/sibling/child chains; only those that we
18898 might refer to by offset later during partial symbol reading.
18900 For now this means things that might have be the target of a
18901 DW_AT_specification, DW_AT_abstract_origin, or
18902 DW_AT_extension. DW_AT_extension will refer only to
18903 namespaces; DW_AT_abstract_origin refers to functions (and
18904 many things under the function DIE, but we do not recurse
18905 into function DIEs during partial symbol reading) and
18906 possibly variables as well; DW_AT_specification refers to
18907 declarations. Declarations ought to have the DW_AT_declaration
18908 flag. It happens that GCC forgets to put it in sometimes, but
18909 only for functions, not for types.
18911 Adding more things than necessary to the hash table is harmless
18912 except for the performance cost. Adding too few will result in
18913 wasted time in find_partial_die, when we reread the compilation
18914 unit with load_all_dies set. */
18917 || abbrev
->tag
== DW_TAG_constant
18918 || abbrev
->tag
== DW_TAG_subprogram
18919 || abbrev
->tag
== DW_TAG_variable
18920 || abbrev
->tag
== DW_TAG_namespace
18921 || part_die
->is_declaration
)
18925 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18926 to_underlying (part_die
->sect_off
),
18931 /* For some DIEs we want to follow their children (if any). For C
18932 we have no reason to follow the children of structures; for other
18933 languages we have to, so that we can get at method physnames
18934 to infer fully qualified class names, for DW_AT_specification,
18935 and for C++ template arguments. For C++, we also look one level
18936 inside functions to find template arguments (if the name of the
18937 function does not already contain the template arguments).
18939 For Ada and Fortran, we need to scan the children of subprograms
18940 and lexical blocks as well because these languages allow the
18941 definition of nested entities that could be interesting for the
18942 debugger, such as nested subprograms for instance. */
18943 if (last_die
->has_children
18945 || last_die
->tag
== DW_TAG_namespace
18946 || last_die
->tag
== DW_TAG_module
18947 || last_die
->tag
== DW_TAG_enumeration_type
18948 || (cu
->language
== language_cplus
18949 && last_die
->tag
== DW_TAG_subprogram
18950 && (last_die
->raw_name
== NULL
18951 || strchr (last_die
->raw_name
, '<') == NULL
))
18952 || (cu
->language
!= language_c
18953 && (last_die
->tag
== DW_TAG_class_type
18954 || last_die
->tag
== DW_TAG_interface_type
18955 || last_die
->tag
== DW_TAG_structure_type
18956 || last_die
->tag
== DW_TAG_union_type
))
18957 || ((cu
->language
== language_ada
18958 || cu
->language
== language_fortran
)
18959 && (last_die
->tag
== DW_TAG_subprogram
18960 || last_die
->tag
== DW_TAG_lexical_block
))))
18963 parent_die
= last_die
;
18967 /* Otherwise we skip to the next sibling, if any. */
18968 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18970 /* Back to the top, do it again. */
18974 partial_die_info::partial_die_info (sect_offset sect_off_
,
18975 struct abbrev_info
*abbrev
)
18976 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18980 /* See class definition. */
18983 partial_die_info::name (dwarf2_cu
*cu
)
18985 if (!canonical_name
&& raw_name
!= nullptr)
18987 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
18988 raw_name
= dwarf2_canonicalize_name (raw_name
, cu
, objfile
);
18989 canonical_name
= 1;
18995 /* Read a minimal amount of information into the minimal die structure.
18996 INFO_PTR should point just after the initial uleb128 of a DIE. */
18999 partial_die_info::read (const struct die_reader_specs
*reader
,
19000 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
19002 struct dwarf2_cu
*cu
= reader
->cu
;
19003 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
19005 int has_low_pc_attr
= 0;
19006 int has_high_pc_attr
= 0;
19007 int high_pc_relative
= 0;
19009 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
19012 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
], info_ptr
);
19013 /* String and address offsets that need to do the reprocessing have
19014 already been read at this point, so there is no need to wait until
19015 the loop terminates to do the reprocessing. */
19016 if (attr
.requires_reprocessing_p ())
19017 read_attribute_reprocess (reader
, &attr
, tag
);
19018 /* Store the data if it is of an attribute we want to keep in a
19019 partial symbol table. */
19025 case DW_TAG_compile_unit
:
19026 case DW_TAG_partial_unit
:
19027 case DW_TAG_type_unit
:
19028 /* Compilation units have a DW_AT_name that is a filename, not
19029 a source language identifier. */
19030 case DW_TAG_enumeration_type
:
19031 case DW_TAG_enumerator
:
19032 /* These tags always have simple identifiers already; no need
19033 to canonicalize them. */
19034 canonical_name
= 1;
19035 raw_name
= attr
.as_string ();
19038 canonical_name
= 0;
19039 raw_name
= attr
.as_string ();
19043 case DW_AT_linkage_name
:
19044 case DW_AT_MIPS_linkage_name
:
19045 /* Note that both forms of linkage name might appear. We
19046 assume they will be the same, and we only store the last
19048 linkage_name
= attr
.as_string ();
19051 has_low_pc_attr
= 1;
19052 lowpc
= attr
.as_address ();
19054 case DW_AT_high_pc
:
19055 has_high_pc_attr
= 1;
19056 highpc
= attr
.as_address ();
19057 if (cu
->header
.version
>= 4 && attr
.form_is_constant ())
19058 high_pc_relative
= 1;
19060 case DW_AT_location
:
19061 /* Support the .debug_loc offsets. */
19062 if (attr
.form_is_block ())
19064 d
.locdesc
= attr
.as_block ();
19066 else if (attr
.form_is_section_offset ())
19068 dwarf2_complex_location_expr_complaint ();
19072 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
19073 "partial symbol information");
19076 case DW_AT_external
:
19077 is_external
= DW_UNSND (&attr
);
19079 case DW_AT_declaration
:
19080 is_declaration
= DW_UNSND (&attr
);
19085 case DW_AT_abstract_origin
:
19086 case DW_AT_specification
:
19087 case DW_AT_extension
:
19088 has_specification
= 1;
19089 spec_offset
= attr
.get_ref_die_offset ();
19090 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
19091 || cu
->per_cu
->is_dwz
);
19093 case DW_AT_sibling
:
19094 /* Ignore absolute siblings, they might point outside of
19095 the current compile unit. */
19096 if (attr
.form
== DW_FORM_ref_addr
)
19097 complaint (_("ignoring absolute DW_AT_sibling"));
19100 const gdb_byte
*buffer
= reader
->buffer
;
19101 sect_offset off
= attr
.get_ref_die_offset ();
19102 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
19104 if (sibling_ptr
< info_ptr
)
19105 complaint (_("DW_AT_sibling points backwards"));
19106 else if (sibling_ptr
> reader
->buffer_end
)
19107 reader
->die_section
->overflow_complaint ();
19109 sibling
= sibling_ptr
;
19112 case DW_AT_byte_size
:
19115 case DW_AT_const_value
:
19116 has_const_value
= 1;
19118 case DW_AT_calling_convention
:
19119 /* DWARF doesn't provide a way to identify a program's source-level
19120 entry point. DW_AT_calling_convention attributes are only meant
19121 to describe functions' calling conventions.
19123 However, because it's a necessary piece of information in
19124 Fortran, and before DWARF 4 DW_CC_program was the only
19125 piece of debugging information whose definition refers to
19126 a 'main program' at all, several compilers marked Fortran
19127 main programs with DW_CC_program --- even when those
19128 functions use the standard calling conventions.
19130 Although DWARF now specifies a way to provide this
19131 information, we support this practice for backward
19133 if (DW_UNSND (&attr
) == DW_CC_program
19134 && cu
->language
== language_fortran
)
19135 main_subprogram
= 1;
19138 if (DW_UNSND (&attr
) == DW_INL_inlined
19139 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
19140 may_be_inlined
= 1;
19144 if (tag
== DW_TAG_imported_unit
)
19146 d
.sect_off
= attr
.get_ref_die_offset ();
19147 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
19148 || cu
->per_cu
->is_dwz
);
19152 case DW_AT_main_subprogram
:
19153 main_subprogram
= DW_UNSND (&attr
);
19158 /* DW_AT_rnglists_base does not apply to DIEs from the DWO
19159 skeleton. We take advantage of the fact the DW_AT_ranges
19160 does not appear in DW_TAG_compile_unit of DWO files.
19162 Attributes of the form DW_FORM_rnglistx have already had
19163 their value changed by read_rnglist_index and already
19164 include DW_AT_rnglists_base, so don't need to add the ranges
19166 int need_ranges_base
= (tag
!= DW_TAG_compile_unit
19167 && attr
.form
!= DW_FORM_rnglistx
);
19168 unsigned int ranges_offset
= (DW_UNSND (&attr
)
19169 + (need_ranges_base
19173 /* Value of the DW_AT_ranges attribute is the offset in the
19174 .debug_ranges section. */
19175 if (dwarf2_ranges_read (ranges_offset
, &lowpc
, &highpc
, cu
,
19186 /* For Ada, if both the name and the linkage name appear, we prefer
19187 the latter. This lets "catch exception" work better, regardless
19188 of the order in which the name and linkage name were emitted.
19189 Really, though, this is just a workaround for the fact that gdb
19190 doesn't store both the name and the linkage name. */
19191 if (cu
->language
== language_ada
&& linkage_name
!= nullptr)
19192 raw_name
= linkage_name
;
19194 if (high_pc_relative
)
19197 if (has_low_pc_attr
&& has_high_pc_attr
)
19199 /* When using the GNU linker, .gnu.linkonce. sections are used to
19200 eliminate duplicate copies of functions and vtables and such.
19201 The linker will arbitrarily choose one and discard the others.
19202 The AT_*_pc values for such functions refer to local labels in
19203 these sections. If the section from that file was discarded, the
19204 labels are not in the output, so the relocs get a value of 0.
19205 If this is a discarded function, mark the pc bounds as invalid,
19206 so that GDB will ignore it. */
19207 if (lowpc
== 0 && !per_objfile
->per_bfd
->has_section_at_zero
)
19209 struct objfile
*objfile
= per_objfile
->objfile
;
19210 struct gdbarch
*gdbarch
= objfile
->arch ();
19212 complaint (_("DW_AT_low_pc %s is zero "
19213 "for DIE at %s [in module %s]"),
19214 paddress (gdbarch
, lowpc
),
19215 sect_offset_str (sect_off
),
19216 objfile_name (objfile
));
19218 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
19219 else if (lowpc
>= highpc
)
19221 struct objfile
*objfile
= per_objfile
->objfile
;
19222 struct gdbarch
*gdbarch
= objfile
->arch ();
19224 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
19225 "for DIE at %s [in module %s]"),
19226 paddress (gdbarch
, lowpc
),
19227 paddress (gdbarch
, highpc
),
19228 sect_offset_str (sect_off
),
19229 objfile_name (objfile
));
19238 /* Find a cached partial DIE at OFFSET in CU. */
19240 struct partial_die_info
*
19241 dwarf2_cu::find_partial_die (sect_offset sect_off
)
19243 struct partial_die_info
*lookup_die
= NULL
;
19244 struct partial_die_info
part_die (sect_off
);
19246 lookup_die
= ((struct partial_die_info
*)
19247 htab_find_with_hash (partial_dies
, &part_die
,
19248 to_underlying (sect_off
)));
19253 /* Find a partial DIE at OFFSET, which may or may not be in CU,
19254 except in the case of .debug_types DIEs which do not reference
19255 outside their CU (they do however referencing other types via
19256 DW_FORM_ref_sig8). */
19258 static const struct cu_partial_die_info
19259 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
19261 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
19262 struct objfile
*objfile
= per_objfile
->objfile
;
19263 struct partial_die_info
*pd
= NULL
;
19265 if (offset_in_dwz
== cu
->per_cu
->is_dwz
19266 && cu
->header
.offset_in_cu_p (sect_off
))
19268 pd
= cu
->find_partial_die (sect_off
);
19271 /* We missed recording what we needed.
19272 Load all dies and try again. */
19276 /* TUs don't reference other CUs/TUs (except via type signatures). */
19277 if (cu
->per_cu
->is_debug_types
)
19279 error (_("Dwarf Error: Type Unit at offset %s contains"
19280 " external reference to offset %s [in module %s].\n"),
19281 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
19282 bfd_get_filename (objfile
->obfd
));
19284 dwarf2_per_cu_data
*per_cu
19285 = dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
19288 cu
= per_objfile
->get_cu (per_cu
);
19289 if (cu
== NULL
|| cu
->partial_dies
== NULL
)
19290 load_partial_comp_unit (per_cu
, per_objfile
, nullptr);
19292 cu
= per_objfile
->get_cu (per_cu
);
19295 pd
= cu
->find_partial_die (sect_off
);
19298 /* If we didn't find it, and not all dies have been loaded,
19299 load them all and try again. */
19301 if (pd
== NULL
&& cu
->per_cu
->load_all_dies
== 0)
19303 cu
->per_cu
->load_all_dies
= 1;
19305 /* This is nasty. When we reread the DIEs, somewhere up the call chain
19306 THIS_CU->cu may already be in use. So we can't just free it and
19307 replace its DIEs with the ones we read in. Instead, we leave those
19308 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
19309 and clobber THIS_CU->cu->partial_dies with the hash table for the new
19311 load_partial_comp_unit (cu
->per_cu
, per_objfile
, cu
);
19313 pd
= cu
->find_partial_die (sect_off
);
19317 error (_("Dwarf Error: Cannot not find DIE at %s [from module %s]\n"),
19318 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
19322 /* See if we can figure out if the class lives in a namespace. We do
19323 this by looking for a member function; its demangled name will
19324 contain namespace info, if there is any. */
19327 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
19328 struct dwarf2_cu
*cu
)
19330 /* NOTE: carlton/2003-10-07: Getting the info this way changes
19331 what template types look like, because the demangler
19332 frequently doesn't give the same name as the debug info. We
19333 could fix this by only using the demangled name to get the
19334 prefix (but see comment in read_structure_type). */
19336 struct partial_die_info
*real_pdi
;
19337 struct partial_die_info
*child_pdi
;
19339 /* If this DIE (this DIE's specification, if any) has a parent, then
19340 we should not do this. We'll prepend the parent's fully qualified
19341 name when we create the partial symbol. */
19343 real_pdi
= struct_pdi
;
19344 while (real_pdi
->has_specification
)
19346 auto res
= find_partial_die (real_pdi
->spec_offset
,
19347 real_pdi
->spec_is_dwz
, cu
);
19348 real_pdi
= res
.pdi
;
19352 if (real_pdi
->die_parent
!= NULL
)
19355 for (child_pdi
= struct_pdi
->die_child
;
19357 child_pdi
= child_pdi
->die_sibling
)
19359 if (child_pdi
->tag
== DW_TAG_subprogram
19360 && child_pdi
->linkage_name
!= NULL
)
19362 gdb::unique_xmalloc_ptr
<char> actual_class_name
19363 (cu
->language_defn
->class_name_from_physname
19364 (child_pdi
->linkage_name
));
19365 if (actual_class_name
!= NULL
)
19367 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
19368 struct_pdi
->raw_name
= objfile
->intern (actual_class_name
.get ());
19369 struct_pdi
->canonical_name
= 1;
19376 /* Return true if a DIE with TAG may have the DW_AT_const_value
19380 can_have_DW_AT_const_value_p (enum dwarf_tag tag
)
19384 case DW_TAG_constant
:
19385 case DW_TAG_enumerator
:
19386 case DW_TAG_formal_parameter
:
19387 case DW_TAG_template_value_param
:
19388 case DW_TAG_variable
:
19396 partial_die_info::fixup (struct dwarf2_cu
*cu
)
19398 /* Once we've fixed up a die, there's no point in doing so again.
19399 This also avoids a memory leak if we were to call
19400 guess_partial_die_structure_name multiple times. */
19404 /* If we found a reference attribute and the DIE has no name, try
19405 to find a name in the referred to DIE. */
19407 if (raw_name
== NULL
&& has_specification
)
19409 struct partial_die_info
*spec_die
;
19411 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
19412 spec_die
= res
.pdi
;
19415 spec_die
->fixup (cu
);
19417 if (spec_die
->raw_name
)
19419 raw_name
= spec_die
->raw_name
;
19420 canonical_name
= spec_die
->canonical_name
;
19422 /* Copy DW_AT_external attribute if it is set. */
19423 if (spec_die
->is_external
)
19424 is_external
= spec_die
->is_external
;
19428 if (!has_const_value
&& has_specification
19429 && can_have_DW_AT_const_value_p (tag
))
19431 struct partial_die_info
*spec_die
;
19433 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
19434 spec_die
= res
.pdi
;
19437 spec_die
->fixup (cu
);
19439 if (spec_die
->has_const_value
)
19441 /* Copy DW_AT_const_value attribute if it is set. */
19442 has_const_value
= spec_die
->has_const_value
;
19446 /* Set default names for some unnamed DIEs. */
19448 if (raw_name
== NULL
&& tag
== DW_TAG_namespace
)
19450 raw_name
= CP_ANONYMOUS_NAMESPACE_STR
;
19451 canonical_name
= 1;
19454 /* If there is no parent die to provide a namespace, and there are
19455 children, see if we can determine the namespace from their linkage
19457 if (cu
->language
== language_cplus
19458 && !cu
->per_objfile
->per_bfd
->types
.empty ()
19459 && die_parent
== NULL
19461 && (tag
== DW_TAG_class_type
19462 || tag
== DW_TAG_structure_type
19463 || tag
== DW_TAG_union_type
))
19464 guess_partial_die_structure_name (this, cu
);
19466 /* GCC might emit a nameless struct or union that has a linkage
19467 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19468 if (raw_name
== NULL
19469 && (tag
== DW_TAG_class_type
19470 || tag
== DW_TAG_interface_type
19471 || tag
== DW_TAG_structure_type
19472 || tag
== DW_TAG_union_type
)
19473 && linkage_name
!= NULL
)
19475 gdb::unique_xmalloc_ptr
<char> demangled
19476 (gdb_demangle (linkage_name
, DMGL_TYPES
));
19477 if (demangled
!= nullptr)
19481 /* Strip any leading namespaces/classes, keep only the base name.
19482 DW_AT_name for named DIEs does not contain the prefixes. */
19483 base
= strrchr (demangled
.get (), ':');
19484 if (base
&& base
> demangled
.get () && base
[-1] == ':')
19487 base
= demangled
.get ();
19489 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
19490 raw_name
= objfile
->intern (base
);
19491 canonical_name
= 1;
19498 /* Read the .debug_loclists or .debug_rnglists header (they are the same format)
19499 contents from the given SECTION in the HEADER. */
19501 read_loclists_rnglists_header (struct loclists_rnglists_header
*header
,
19502 struct dwarf2_section_info
*section
)
19504 unsigned int bytes_read
;
19505 bfd
*abfd
= section
->get_bfd_owner ();
19506 const gdb_byte
*info_ptr
= section
->buffer
;
19507 header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
19508 info_ptr
+= bytes_read
;
19509 header
->version
= read_2_bytes (abfd
, info_ptr
);
19511 header
->addr_size
= read_1_byte (abfd
, info_ptr
);
19513 header
->segment_collector_size
= read_1_byte (abfd
, info_ptr
);
19515 header
->offset_entry_count
= read_4_bytes (abfd
, info_ptr
);
19518 /* Return the DW_AT_loclists_base value for the CU. */
19520 lookup_loclist_base (struct dwarf2_cu
*cu
)
19522 /* For the .dwo unit, the loclist_base points to the first offset following
19523 the header. The header consists of the following entities-
19524 1. Unit Length (4 bytes for 32 bit DWARF format, and 12 bytes for the 64
19526 2. version (2 bytes)
19527 3. address size (1 byte)
19528 4. segment selector size (1 byte)
19529 5. offset entry count (4 bytes)
19530 These sizes are derived as per the DWARFv5 standard. */
19531 if (cu
->dwo_unit
!= nullptr)
19533 if (cu
->header
.initial_length_size
== 4)
19534 return LOCLIST_HEADER_SIZE32
;
19535 return LOCLIST_HEADER_SIZE64
;
19537 return cu
->loclist_base
;
19540 /* Given a DW_FORM_loclistx value LOCLIST_INDEX, fetch the offset from the
19541 array of offsets in the .debug_loclists section. */
19543 read_loclist_index (struct dwarf2_cu
*cu
, ULONGEST loclist_index
)
19545 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
19546 struct objfile
*objfile
= per_objfile
->objfile
;
19547 bfd
*abfd
= objfile
->obfd
;
19548 ULONGEST loclist_base
= lookup_loclist_base (cu
);
19549 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
19551 section
->read (objfile
);
19552 if (section
->buffer
== NULL
)
19553 complaint (_("DW_FORM_loclistx used without .debug_loclists "
19554 "section [in module %s]"), objfile_name (objfile
));
19555 struct loclists_rnglists_header header
;
19556 read_loclists_rnglists_header (&header
, section
);
19557 if (loclist_index
>= header
.offset_entry_count
)
19558 complaint (_("DW_FORM_loclistx pointing outside of "
19559 ".debug_loclists offset array [in module %s]"),
19560 objfile_name (objfile
));
19561 if (loclist_base
+ loclist_index
* cu
->header
.offset_size
19563 complaint (_("DW_FORM_loclistx pointing outside of "
19564 ".debug_loclists section [in module %s]"),
19565 objfile_name (objfile
));
19566 const gdb_byte
*info_ptr
19567 = section
->buffer
+ loclist_base
+ loclist_index
* cu
->header
.offset_size
;
19569 if (cu
->header
.offset_size
== 4)
19570 return bfd_get_32 (abfd
, info_ptr
) + loclist_base
;
19572 return bfd_get_64 (abfd
, info_ptr
) + loclist_base
;
19575 /* Given a DW_FORM_rnglistx value RNGLIST_INDEX, fetch the offset from the
19576 array of offsets in the .debug_rnglists section. */
19578 read_rnglist_index (struct dwarf2_cu
*cu
, ULONGEST rnglist_index
,
19581 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
19582 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19583 bfd
*abfd
= objfile
->obfd
;
19584 ULONGEST rnglist_header_size
=
19585 (cu
->header
.initial_length_size
== 4 ? RNGLIST_HEADER_SIZE32
19586 : RNGLIST_HEADER_SIZE64
);
19587 ULONGEST rnglist_base
=
19588 (cu
->dwo_unit
!= nullptr) ? rnglist_header_size
: cu
->ranges_base
;
19589 ULONGEST start_offset
=
19590 rnglist_base
+ rnglist_index
* cu
->header
.offset_size
;
19592 /* Get rnglists section. */
19593 struct dwarf2_section_info
*section
= cu_debug_rnglists_section (cu
, tag
);
19595 /* Read the rnglists section content. */
19596 section
->read (objfile
);
19597 if (section
->buffer
== nullptr)
19598 error (_("DW_FORM_rnglistx used without .debug_rnglists section "
19600 objfile_name (objfile
));
19602 /* Verify the rnglist index is valid. */
19603 struct loclists_rnglists_header header
;
19604 read_loclists_rnglists_header (&header
, section
);
19605 if (rnglist_index
>= header
.offset_entry_count
)
19606 error (_("DW_FORM_rnglistx index pointing outside of "
19607 ".debug_rnglists offset array [in module %s]"),
19608 objfile_name (objfile
));
19610 /* Validate that the offset is within the section's range. */
19611 if (start_offset
>= section
->size
)
19612 error (_("DW_FORM_rnglistx pointing outside of "
19613 ".debug_rnglists section [in module %s]"),
19614 objfile_name (objfile
));
19616 /* Validate that reading won't go beyond the end of the section. */
19617 if (start_offset
+ cu
->header
.offset_size
> rnglist_base
+ section
->size
)
19618 error (_("Reading DW_FORM_rnglistx index beyond end of"
19619 ".debug_rnglists section [in module %s]"),
19620 objfile_name (objfile
));
19622 const gdb_byte
*info_ptr
= section
->buffer
+ start_offset
;
19624 if (cu
->header
.offset_size
== 4)
19625 return read_4_bytes (abfd
, info_ptr
) + rnglist_base
;
19627 return read_8_bytes (abfd
, info_ptr
) + rnglist_base
;
19630 /* Process the attributes that had to be skipped in the first round. These
19631 attributes are the ones that need str_offsets_base or addr_base attributes.
19632 They could not have been processed in the first round, because at the time
19633 the values of str_offsets_base or addr_base may not have been known. */
19635 read_attribute_reprocess (const struct die_reader_specs
*reader
,
19636 struct attribute
*attr
, dwarf_tag tag
)
19638 struct dwarf2_cu
*cu
= reader
->cu
;
19639 switch (attr
->form
)
19641 case DW_FORM_addrx
:
19642 case DW_FORM_GNU_addr_index
:
19643 attr
->set_address (read_addr_index (cu
,
19644 attr
->as_unsigned_reprocess ()));
19646 case DW_FORM_loclistx
:
19647 DW_UNSND (attr
) = read_loclist_index (cu
, DW_UNSND (attr
));
19649 case DW_FORM_rnglistx
:
19650 DW_UNSND (attr
) = read_rnglist_index (cu
, DW_UNSND (attr
), tag
);
19653 case DW_FORM_strx1
:
19654 case DW_FORM_strx2
:
19655 case DW_FORM_strx3
:
19656 case DW_FORM_strx4
:
19657 case DW_FORM_GNU_str_index
:
19659 unsigned int str_index
= attr
->as_unsigned_reprocess ();
19660 gdb_assert (!attr
->canonical_string_p ());
19661 if (reader
->dwo_file
!= NULL
)
19662 attr
->set_string_noncanonical (read_dwo_str_index (reader
,
19665 attr
->set_string_noncanonical (read_stub_str_index (cu
,
19670 gdb_assert_not_reached (_("Unexpected DWARF form."));
19674 /* Read an attribute value described by an attribute form. */
19676 static const gdb_byte
*
19677 read_attribute_value (const struct die_reader_specs
*reader
,
19678 struct attribute
*attr
, unsigned form
,
19679 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
19681 struct dwarf2_cu
*cu
= reader
->cu
;
19682 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
19683 struct objfile
*objfile
= per_objfile
->objfile
;
19684 bfd
*abfd
= reader
->abfd
;
19685 struct comp_unit_head
*cu_header
= &cu
->header
;
19686 unsigned int bytes_read
;
19687 struct dwarf_block
*blk
;
19689 attr
->form
= (enum dwarf_form
) form
;
19692 case DW_FORM_ref_addr
:
19693 if (cu
->header
.version
== 2)
19694 attr
->set_unsigned (cu
->header
.read_address (abfd
, info_ptr
,
19697 attr
->set_unsigned (cu
->header
.read_offset (abfd
, info_ptr
,
19699 info_ptr
+= bytes_read
;
19701 case DW_FORM_GNU_ref_alt
:
19702 attr
->set_unsigned (cu
->header
.read_offset (abfd
, info_ptr
,
19704 info_ptr
+= bytes_read
;
19708 struct gdbarch
*gdbarch
= objfile
->arch ();
19709 CORE_ADDR addr
= cu
->header
.read_address (abfd
, info_ptr
, &bytes_read
);
19710 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
);
19711 attr
->set_address (addr
);
19712 info_ptr
+= bytes_read
;
19715 case DW_FORM_block2
:
19716 blk
= dwarf_alloc_block (cu
);
19717 blk
->size
= read_2_bytes (abfd
, info_ptr
);
19719 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19720 info_ptr
+= blk
->size
;
19721 attr
->set_block (blk
);
19723 case DW_FORM_block4
:
19724 blk
= dwarf_alloc_block (cu
);
19725 blk
->size
= read_4_bytes (abfd
, info_ptr
);
19727 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19728 info_ptr
+= blk
->size
;
19729 attr
->set_block (blk
);
19731 case DW_FORM_data2
:
19732 attr
->set_unsigned (read_2_bytes (abfd
, info_ptr
));
19735 case DW_FORM_data4
:
19736 attr
->set_unsigned (read_4_bytes (abfd
, info_ptr
));
19739 case DW_FORM_data8
:
19740 attr
->set_unsigned (read_8_bytes (abfd
, info_ptr
));
19743 case DW_FORM_data16
:
19744 blk
= dwarf_alloc_block (cu
);
19746 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
19748 attr
->set_block (blk
);
19750 case DW_FORM_sec_offset
:
19751 attr
->set_unsigned (cu
->header
.read_offset (abfd
, info_ptr
,
19753 info_ptr
+= bytes_read
;
19755 case DW_FORM_loclistx
:
19757 attr
->set_unsigned_reprocess (read_unsigned_leb128 (abfd
, info_ptr
,
19759 info_ptr
+= bytes_read
;
19762 case DW_FORM_string
:
19763 attr
->set_string_noncanonical (read_direct_string (abfd
, info_ptr
,
19765 info_ptr
+= bytes_read
;
19768 if (!cu
->per_cu
->is_dwz
)
19770 attr
->set_string_noncanonical
19771 (read_indirect_string (per_objfile
,
19772 abfd
, info_ptr
, cu_header
,
19774 info_ptr
+= bytes_read
;
19778 case DW_FORM_line_strp
:
19779 if (!cu
->per_cu
->is_dwz
)
19781 attr
->set_string_noncanonical
19782 (per_objfile
->read_line_string (info_ptr
, cu_header
,
19784 info_ptr
+= bytes_read
;
19788 case DW_FORM_GNU_strp_alt
:
19790 dwz_file
*dwz
= dwarf2_get_dwz_file (per_objfile
->per_bfd
);
19791 LONGEST str_offset
= cu_header
->read_offset (abfd
, info_ptr
,
19794 attr
->set_string_noncanonical
19795 (dwz
->read_string (objfile
, str_offset
));
19796 info_ptr
+= bytes_read
;
19799 case DW_FORM_exprloc
:
19800 case DW_FORM_block
:
19801 blk
= dwarf_alloc_block (cu
);
19802 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19803 info_ptr
+= bytes_read
;
19804 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19805 info_ptr
+= blk
->size
;
19806 attr
->set_block (blk
);
19808 case DW_FORM_block1
:
19809 blk
= dwarf_alloc_block (cu
);
19810 blk
->size
= read_1_byte (abfd
, info_ptr
);
19812 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19813 info_ptr
+= blk
->size
;
19814 attr
->set_block (blk
);
19816 case DW_FORM_data1
:
19818 attr
->set_unsigned (read_1_byte (abfd
, info_ptr
));
19821 case DW_FORM_flag_present
:
19822 attr
->set_unsigned (1);
19824 case DW_FORM_sdata
:
19825 attr
->set_signed (read_signed_leb128 (abfd
, info_ptr
, &bytes_read
));
19826 info_ptr
+= bytes_read
;
19828 case DW_FORM_rnglistx
:
19830 attr
->set_unsigned_reprocess (read_unsigned_leb128 (abfd
, info_ptr
,
19832 info_ptr
+= bytes_read
;
19835 case DW_FORM_udata
:
19836 attr
->set_unsigned (read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19837 info_ptr
+= bytes_read
;
19840 attr
->set_unsigned ((to_underlying (cu
->header
.sect_off
)
19841 + read_1_byte (abfd
, info_ptr
)));
19845 attr
->set_unsigned ((to_underlying (cu
->header
.sect_off
)
19846 + read_2_bytes (abfd
, info_ptr
)));
19850 attr
->set_unsigned ((to_underlying (cu
->header
.sect_off
)
19851 + read_4_bytes (abfd
, info_ptr
)));
19855 attr
->set_unsigned ((to_underlying (cu
->header
.sect_off
)
19856 + read_8_bytes (abfd
, info_ptr
)));
19859 case DW_FORM_ref_sig8
:
19860 attr
->set_signature (read_8_bytes (abfd
, info_ptr
));
19863 case DW_FORM_ref_udata
:
19864 attr
->set_unsigned ((to_underlying (cu
->header
.sect_off
)
19865 + read_unsigned_leb128 (abfd
, info_ptr
,
19867 info_ptr
+= bytes_read
;
19869 case DW_FORM_indirect
:
19870 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19871 info_ptr
+= bytes_read
;
19872 if (form
== DW_FORM_implicit_const
)
19874 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19875 info_ptr
+= bytes_read
;
19877 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19880 case DW_FORM_implicit_const
:
19881 attr
->set_signed (implicit_const
);
19883 case DW_FORM_addrx
:
19884 case DW_FORM_GNU_addr_index
:
19885 attr
->set_unsigned_reprocess (read_unsigned_leb128 (abfd
, info_ptr
,
19887 info_ptr
+= bytes_read
;
19890 case DW_FORM_strx1
:
19891 case DW_FORM_strx2
:
19892 case DW_FORM_strx3
:
19893 case DW_FORM_strx4
:
19894 case DW_FORM_GNU_str_index
:
19896 ULONGEST str_index
;
19897 if (form
== DW_FORM_strx1
)
19899 str_index
= read_1_byte (abfd
, info_ptr
);
19902 else if (form
== DW_FORM_strx2
)
19904 str_index
= read_2_bytes (abfd
, info_ptr
);
19907 else if (form
== DW_FORM_strx3
)
19909 str_index
= read_3_bytes (abfd
, info_ptr
);
19912 else if (form
== DW_FORM_strx4
)
19914 str_index
= read_4_bytes (abfd
, info_ptr
);
19919 str_index
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19920 info_ptr
+= bytes_read
;
19922 attr
->set_unsigned_reprocess (str_index
);
19926 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19927 dwarf_form_name (form
),
19928 bfd_get_filename (abfd
));
19932 if (cu
->per_cu
->is_dwz
&& attr
->form_is_ref ())
19933 attr
->form
= DW_FORM_GNU_ref_alt
;
19935 /* We have seen instances where the compiler tried to emit a byte
19936 size attribute of -1 which ended up being encoded as an unsigned
19937 0xffffffff. Although 0xffffffff is technically a valid size value,
19938 an object of this size seems pretty unlikely so we can relatively
19939 safely treat these cases as if the size attribute was invalid and
19940 treat them as zero by default. */
19941 if (attr
->name
== DW_AT_byte_size
19942 && form
== DW_FORM_data4
19943 && DW_UNSND (attr
) >= 0xffffffff)
19946 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19947 hex_string (DW_UNSND (attr
)));
19948 attr
->set_unsigned (0);
19954 /* Read an attribute described by an abbreviated attribute. */
19956 static const gdb_byte
*
19957 read_attribute (const struct die_reader_specs
*reader
,
19958 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19959 const gdb_byte
*info_ptr
)
19961 attr
->name
= abbrev
->name
;
19962 attr
->string_is_canonical
= 0;
19963 attr
->requires_reprocessing
= 0;
19964 return read_attribute_value (reader
, attr
, abbrev
->form
,
19965 abbrev
->implicit_const
, info_ptr
);
19968 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19970 static const char *
19971 read_indirect_string_at_offset (dwarf2_per_objfile
*per_objfile
,
19972 LONGEST str_offset
)
19974 return per_objfile
->per_bfd
->str
.read_string (per_objfile
->objfile
,
19975 str_offset
, "DW_FORM_strp");
19978 /* Return pointer to string at .debug_str offset as read from BUF.
19979 BUF is assumed to be in a compilation unit described by CU_HEADER.
19980 Return *BYTES_READ_PTR count of bytes read from BUF. */
19982 static const char *
19983 read_indirect_string (dwarf2_per_objfile
*per_objfile
, bfd
*abfd
,
19984 const gdb_byte
*buf
,
19985 const struct comp_unit_head
*cu_header
,
19986 unsigned int *bytes_read_ptr
)
19988 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
19990 return read_indirect_string_at_offset (per_objfile
, str_offset
);
19996 dwarf2_per_objfile::read_line_string (const gdb_byte
*buf
,
19997 const struct comp_unit_head
*cu_header
,
19998 unsigned int *bytes_read_ptr
)
20000 bfd
*abfd
= objfile
->obfd
;
20001 LONGEST str_offset
= cu_header
->read_offset (abfd
, buf
, bytes_read_ptr
);
20003 return per_bfd
->line_str
.read_string (objfile
, str_offset
, "DW_FORM_line_strp");
20006 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
20007 ADDR_BASE is the DW_AT_addr_base (DW_AT_GNU_addr_base) attribute or zero.
20008 ADDR_SIZE is the size of addresses from the CU header. */
20011 read_addr_index_1 (dwarf2_per_objfile
*per_objfile
, unsigned int addr_index
,
20012 gdb::optional
<ULONGEST
> addr_base
, int addr_size
)
20014 struct objfile
*objfile
= per_objfile
->objfile
;
20015 bfd
*abfd
= objfile
->obfd
;
20016 const gdb_byte
*info_ptr
;
20017 ULONGEST addr_base_or_zero
= addr_base
.has_value () ? *addr_base
: 0;
20019 per_objfile
->per_bfd
->addr
.read (objfile
);
20020 if (per_objfile
->per_bfd
->addr
.buffer
== NULL
)
20021 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
20022 objfile_name (objfile
));
20023 if (addr_base_or_zero
+ addr_index
* addr_size
20024 >= per_objfile
->per_bfd
->addr
.size
)
20025 error (_("DW_FORM_addr_index pointing outside of "
20026 ".debug_addr section [in module %s]"),
20027 objfile_name (objfile
));
20028 info_ptr
= (per_objfile
->per_bfd
->addr
.buffer
+ addr_base_or_zero
20029 + addr_index
* addr_size
);
20030 if (addr_size
== 4)
20031 return bfd_get_32 (abfd
, info_ptr
);
20033 return bfd_get_64 (abfd
, info_ptr
);
20036 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
20039 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
20041 return read_addr_index_1 (cu
->per_objfile
, addr_index
,
20042 cu
->addr_base
, cu
->header
.addr_size
);
20045 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
20048 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
20049 unsigned int *bytes_read
)
20051 bfd
*abfd
= cu
->per_objfile
->objfile
->obfd
;
20052 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
20054 return read_addr_index (cu
, addr_index
);
20060 dwarf2_read_addr_index (dwarf2_per_cu_data
*per_cu
,
20061 dwarf2_per_objfile
*per_objfile
,
20062 unsigned int addr_index
)
20064 struct dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
20065 gdb::optional
<ULONGEST
> addr_base
;
20068 /* We need addr_base and addr_size.
20069 If we don't have PER_CU->cu, we have to get it.
20070 Nasty, but the alternative is storing the needed info in PER_CU,
20071 which at this point doesn't seem justified: it's not clear how frequently
20072 it would get used and it would increase the size of every PER_CU.
20073 Entry points like dwarf2_per_cu_addr_size do a similar thing
20074 so we're not in uncharted territory here.
20075 Alas we need to be a bit more complicated as addr_base is contained
20078 We don't need to read the entire CU(/TU).
20079 We just need the header and top level die.
20081 IWBN to use the aging mechanism to let us lazily later discard the CU.
20082 For now we skip this optimization. */
20086 addr_base
= cu
->addr_base
;
20087 addr_size
= cu
->header
.addr_size
;
20091 cutu_reader
reader (per_cu
, per_objfile
, nullptr, nullptr, false);
20092 addr_base
= reader
.cu
->addr_base
;
20093 addr_size
= reader
.cu
->header
.addr_size
;
20096 return read_addr_index_1 (per_objfile
, addr_index
, addr_base
, addr_size
);
20099 /* Given a DW_FORM_GNU_str_index value STR_INDEX, fetch the string.
20100 STR_SECTION, STR_OFFSETS_SECTION can be from a Fission stub or a
20103 static const char *
20104 read_str_index (struct dwarf2_cu
*cu
,
20105 struct dwarf2_section_info
*str_section
,
20106 struct dwarf2_section_info
*str_offsets_section
,
20107 ULONGEST str_offsets_base
, ULONGEST str_index
)
20109 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
20110 struct objfile
*objfile
= per_objfile
->objfile
;
20111 const char *objf_name
= objfile_name (objfile
);
20112 bfd
*abfd
= objfile
->obfd
;
20113 const gdb_byte
*info_ptr
;
20114 ULONGEST str_offset
;
20115 static const char form_name
[] = "DW_FORM_GNU_str_index or DW_FORM_strx";
20117 str_section
->read (objfile
);
20118 str_offsets_section
->read (objfile
);
20119 if (str_section
->buffer
== NULL
)
20120 error (_("%s used without %s section"
20121 " in CU at offset %s [in module %s]"),
20122 form_name
, str_section
->get_name (),
20123 sect_offset_str (cu
->header
.sect_off
), objf_name
);
20124 if (str_offsets_section
->buffer
== NULL
)
20125 error (_("%s used without %s section"
20126 " in CU at offset %s [in module %s]"),
20127 form_name
, str_section
->get_name (),
20128 sect_offset_str (cu
->header
.sect_off
), objf_name
);
20129 info_ptr
= (str_offsets_section
->buffer
20131 + str_index
* cu
->header
.offset_size
);
20132 if (cu
->header
.offset_size
== 4)
20133 str_offset
= bfd_get_32 (abfd
, info_ptr
);
20135 str_offset
= bfd_get_64 (abfd
, info_ptr
);
20136 if (str_offset
>= str_section
->size
)
20137 error (_("Offset from %s pointing outside of"
20138 " .debug_str.dwo section in CU at offset %s [in module %s]"),
20139 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
20140 return (const char *) (str_section
->buffer
+ str_offset
);
20143 /* Given a DW_FORM_GNU_str_index from a DWO file, fetch the string. */
20145 static const char *
20146 read_dwo_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
20148 ULONGEST str_offsets_base
= reader
->cu
->header
.version
>= 5
20149 ? reader
->cu
->header
.addr_size
: 0;
20150 return read_str_index (reader
->cu
,
20151 &reader
->dwo_file
->sections
.str
,
20152 &reader
->dwo_file
->sections
.str_offsets
,
20153 str_offsets_base
, str_index
);
20156 /* Given a DW_FORM_GNU_str_index from a Fission stub, fetch the string. */
20158 static const char *
20159 read_stub_str_index (struct dwarf2_cu
*cu
, ULONGEST str_index
)
20161 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
20162 const char *objf_name
= objfile_name (objfile
);
20163 static const char form_name
[] = "DW_FORM_GNU_str_index";
20164 static const char str_offsets_attr_name
[] = "DW_AT_str_offsets";
20166 if (!cu
->str_offsets_base
.has_value ())
20167 error (_("%s used in Fission stub without %s"
20168 " in CU at offset 0x%lx [in module %s]"),
20169 form_name
, str_offsets_attr_name
,
20170 (long) cu
->header
.offset_size
, objf_name
);
20172 return read_str_index (cu
,
20173 &cu
->per_objfile
->per_bfd
->str
,
20174 &cu
->per_objfile
->per_bfd
->str_offsets
,
20175 *cu
->str_offsets_base
, str_index
);
20178 /* Return the length of an LEB128 number in BUF. */
20181 leb128_size (const gdb_byte
*buf
)
20183 const gdb_byte
*begin
= buf
;
20189 if ((byte
& 128) == 0)
20190 return buf
- begin
;
20195 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
20204 cu
->language
= language_c
;
20207 case DW_LANG_C_plus_plus
:
20208 case DW_LANG_C_plus_plus_11
:
20209 case DW_LANG_C_plus_plus_14
:
20210 cu
->language
= language_cplus
;
20213 cu
->language
= language_d
;
20215 case DW_LANG_Fortran77
:
20216 case DW_LANG_Fortran90
:
20217 case DW_LANG_Fortran95
:
20218 case DW_LANG_Fortran03
:
20219 case DW_LANG_Fortran08
:
20220 cu
->language
= language_fortran
;
20223 cu
->language
= language_go
;
20225 case DW_LANG_Mips_Assembler
:
20226 cu
->language
= language_asm
;
20228 case DW_LANG_Ada83
:
20229 case DW_LANG_Ada95
:
20230 cu
->language
= language_ada
;
20232 case DW_LANG_Modula2
:
20233 cu
->language
= language_m2
;
20235 case DW_LANG_Pascal83
:
20236 cu
->language
= language_pascal
;
20239 cu
->language
= language_objc
;
20242 case DW_LANG_Rust_old
:
20243 cu
->language
= language_rust
;
20245 case DW_LANG_Cobol74
:
20246 case DW_LANG_Cobol85
:
20248 cu
->language
= language_minimal
;
20251 cu
->language_defn
= language_def (cu
->language
);
20254 /* Return the named attribute or NULL if not there. */
20256 static struct attribute
*
20257 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
20262 struct attribute
*spec
= NULL
;
20264 for (i
= 0; i
< die
->num_attrs
; ++i
)
20266 if (die
->attrs
[i
].name
== name
)
20267 return &die
->attrs
[i
];
20268 if (die
->attrs
[i
].name
== DW_AT_specification
20269 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
20270 spec
= &die
->attrs
[i
];
20276 die
= follow_die_ref (die
, spec
, &cu
);
20282 /* Return the string associated with a string-typed attribute, or NULL if it
20283 is either not found or is of an incorrect type. */
20285 static const char *
20286 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
20288 struct attribute
*attr
;
20289 const char *str
= NULL
;
20291 attr
= dwarf2_attr (die
, name
, cu
);
20295 str
= attr
->as_string ();
20296 if (str
== nullptr)
20297 complaint (_("string type expected for attribute %s for "
20298 "DIE at %s in module %s"),
20299 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
20300 objfile_name (cu
->per_objfile
->objfile
));
20306 /* Return the dwo name or NULL if not present. If present, it is in either
20307 DW_AT_GNU_dwo_name or DW_AT_dwo_name attribute. */
20308 static const char *
20309 dwarf2_dwo_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
20311 const char *dwo_name
= dwarf2_string_attr (die
, DW_AT_GNU_dwo_name
, cu
);
20312 if (dwo_name
== nullptr)
20313 dwo_name
= dwarf2_string_attr (die
, DW_AT_dwo_name
, cu
);
20317 /* Return non-zero iff the attribute NAME is defined for the given DIE,
20318 and holds a non-zero value. This function should only be used for
20319 DW_FORM_flag or DW_FORM_flag_present attributes. */
20322 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
20324 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
20326 return (attr
&& DW_UNSND (attr
));
20330 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
20332 /* A DIE is a declaration if it has a DW_AT_declaration attribute
20333 which value is non-zero. However, we have to be careful with
20334 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
20335 (via dwarf2_flag_true_p) follows this attribute. So we may
20336 end up accidently finding a declaration attribute that belongs
20337 to a different DIE referenced by the specification attribute,
20338 even though the given DIE does not have a declaration attribute. */
20339 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
20340 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
20343 /* Return the die giving the specification for DIE, if there is
20344 one. *SPEC_CU is the CU containing DIE on input, and the CU
20345 containing the return value on output. If there is no
20346 specification, but there is an abstract origin, that is
20349 static struct die_info
*
20350 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
20352 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
20355 if (spec_attr
== NULL
)
20356 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
20358 if (spec_attr
== NULL
)
20361 return follow_die_ref (die
, spec_attr
, spec_cu
);
20364 /* Stub for free_line_header to match void * callback types. */
20367 free_line_header_voidp (void *arg
)
20369 struct line_header
*lh
= (struct line_header
*) arg
;
20374 /* A convenience function to find the proper .debug_line section for a CU. */
20376 static struct dwarf2_section_info
*
20377 get_debug_line_section (struct dwarf2_cu
*cu
)
20379 struct dwarf2_section_info
*section
;
20380 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
20382 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
20384 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20385 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
20386 else if (cu
->per_cu
->is_dwz
)
20388 dwz_file
*dwz
= dwarf2_get_dwz_file (per_objfile
->per_bfd
);
20390 section
= &dwz
->line
;
20393 section
= &per_objfile
->per_bfd
->line
;
20398 /* Read the statement program header starting at OFFSET in
20399 .debug_line, or .debug_line.dwo. Return a pointer
20400 to a struct line_header, allocated using xmalloc.
20401 Returns NULL if there is a problem reading the header, e.g., if it
20402 has a version we don't understand.
20404 NOTE: the strings in the include directory and file name tables of
20405 the returned object point into the dwarf line section buffer,
20406 and must not be freed. */
20408 static line_header_up
20409 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
20411 struct dwarf2_section_info
*section
;
20412 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
20414 section
= get_debug_line_section (cu
);
20415 section
->read (per_objfile
->objfile
);
20416 if (section
->buffer
== NULL
)
20418 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20419 complaint (_("missing .debug_line.dwo section"));
20421 complaint (_("missing .debug_line section"));
20425 return dwarf_decode_line_header (sect_off
, cu
->per_cu
->is_dwz
,
20426 per_objfile
, section
, &cu
->header
);
20429 /* Subroutine of dwarf_decode_lines to simplify it.
20430 Return the file name of the psymtab for the given file_entry.
20431 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20432 If space for the result is malloc'd, *NAME_HOLDER will be set.
20433 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
20435 static const char *
20436 psymtab_include_file_name (const struct line_header
*lh
, const file_entry
&fe
,
20437 const dwarf2_psymtab
*pst
,
20438 const char *comp_dir
,
20439 gdb::unique_xmalloc_ptr
<char> *name_holder
)
20441 const char *include_name
= fe
.name
;
20442 const char *include_name_to_compare
= include_name
;
20443 const char *pst_filename
;
20446 const char *dir_name
= fe
.include_dir (lh
);
20448 gdb::unique_xmalloc_ptr
<char> hold_compare
;
20449 if (!IS_ABSOLUTE_PATH (include_name
)
20450 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
20452 /* Avoid creating a duplicate psymtab for PST.
20453 We do this by comparing INCLUDE_NAME and PST_FILENAME.
20454 Before we do the comparison, however, we need to account
20455 for DIR_NAME and COMP_DIR.
20456 First prepend dir_name (if non-NULL). If we still don't
20457 have an absolute path prepend comp_dir (if non-NULL).
20458 However, the directory we record in the include-file's
20459 psymtab does not contain COMP_DIR (to match the
20460 corresponding symtab(s)).
20465 bash$ gcc -g ./hello.c
20466 include_name = "hello.c"
20468 DW_AT_comp_dir = comp_dir = "/tmp"
20469 DW_AT_name = "./hello.c"
20473 if (dir_name
!= NULL
)
20475 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
20476 include_name
, (char *) NULL
));
20477 include_name
= name_holder
->get ();
20478 include_name_to_compare
= include_name
;
20480 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
20482 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
20483 include_name
, (char *) NULL
));
20484 include_name_to_compare
= hold_compare
.get ();
20488 pst_filename
= pst
->filename
;
20489 gdb::unique_xmalloc_ptr
<char> copied_name
;
20490 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
20492 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
20493 pst_filename
, (char *) NULL
));
20494 pst_filename
= copied_name
.get ();
20497 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
20501 return include_name
;
20504 /* State machine to track the state of the line number program. */
20506 class lnp_state_machine
20509 /* Initialize a machine state for the start of a line number
20511 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
20512 bool record_lines_p
);
20514 file_entry
*current_file ()
20516 /* lh->file_names is 0-based, but the file name numbers in the
20517 statement program are 1-based. */
20518 return m_line_header
->file_name_at (m_file
);
20521 /* Record the line in the state machine. END_SEQUENCE is true if
20522 we're processing the end of a sequence. */
20523 void record_line (bool end_sequence
);
20525 /* Check ADDRESS is -1, or zero and less than UNRELOCATED_LOWPC, and if true
20526 nop-out rest of the lines in this sequence. */
20527 void check_line_address (struct dwarf2_cu
*cu
,
20528 const gdb_byte
*line_ptr
,
20529 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
20531 void handle_set_discriminator (unsigned int discriminator
)
20533 m_discriminator
= discriminator
;
20534 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
20537 /* Handle DW_LNE_set_address. */
20538 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
20541 address
+= baseaddr
;
20542 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
20545 /* Handle DW_LNS_advance_pc. */
20546 void handle_advance_pc (CORE_ADDR adjust
);
20548 /* Handle a special opcode. */
20549 void handle_special_opcode (unsigned char op_code
);
20551 /* Handle DW_LNS_advance_line. */
20552 void handle_advance_line (int line_delta
)
20554 advance_line (line_delta
);
20557 /* Handle DW_LNS_set_file. */
20558 void handle_set_file (file_name_index file
);
20560 /* Handle DW_LNS_negate_stmt. */
20561 void handle_negate_stmt ()
20563 m_is_stmt
= !m_is_stmt
;
20566 /* Handle DW_LNS_const_add_pc. */
20567 void handle_const_add_pc ();
20569 /* Handle DW_LNS_fixed_advance_pc. */
20570 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
20572 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20576 /* Handle DW_LNS_copy. */
20577 void handle_copy ()
20579 record_line (false);
20580 m_discriminator
= 0;
20583 /* Handle DW_LNE_end_sequence. */
20584 void handle_end_sequence ()
20586 m_currently_recording_lines
= true;
20590 /* Advance the line by LINE_DELTA. */
20591 void advance_line (int line_delta
)
20593 m_line
+= line_delta
;
20595 if (line_delta
!= 0)
20596 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20599 struct dwarf2_cu
*m_cu
;
20601 gdbarch
*m_gdbarch
;
20603 /* True if we're recording lines.
20604 Otherwise we're building partial symtabs and are just interested in
20605 finding include files mentioned by the line number program. */
20606 bool m_record_lines_p
;
20608 /* The line number header. */
20609 line_header
*m_line_header
;
20611 /* These are part of the standard DWARF line number state machine,
20612 and initialized according to the DWARF spec. */
20614 unsigned char m_op_index
= 0;
20615 /* The line table index of the current file. */
20616 file_name_index m_file
= 1;
20617 unsigned int m_line
= 1;
20619 /* These are initialized in the constructor. */
20621 CORE_ADDR m_address
;
20623 unsigned int m_discriminator
;
20625 /* Additional bits of state we need to track. */
20627 /* The last file that we called dwarf2_start_subfile for.
20628 This is only used for TLLs. */
20629 unsigned int m_last_file
= 0;
20630 /* The last file a line number was recorded for. */
20631 struct subfile
*m_last_subfile
= NULL
;
20633 /* The address of the last line entry. */
20634 CORE_ADDR m_last_address
;
20636 /* Set to true when a previous line at the same address (using
20637 m_last_address) had m_is_stmt true. This is reset to false when a
20638 line entry at a new address (m_address different to m_last_address) is
20640 bool m_stmt_at_address
= false;
20642 /* When true, record the lines we decode. */
20643 bool m_currently_recording_lines
= false;
20645 /* The last line number that was recorded, used to coalesce
20646 consecutive entries for the same line. This can happen, for
20647 example, when discriminators are present. PR 17276. */
20648 unsigned int m_last_line
= 0;
20649 bool m_line_has_non_zero_discriminator
= false;
20653 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
20655 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
20656 / m_line_header
->maximum_ops_per_instruction
)
20657 * m_line_header
->minimum_instruction_length
);
20658 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20659 m_op_index
= ((m_op_index
+ adjust
)
20660 % m_line_header
->maximum_ops_per_instruction
);
20664 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
20666 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
20667 unsigned char adj_opcode_d
= adj_opcode
/ m_line_header
->line_range
;
20668 unsigned char adj_opcode_r
= adj_opcode
% m_line_header
->line_range
;
20669 CORE_ADDR addr_adj
= (((m_op_index
+ adj_opcode_d
)
20670 / m_line_header
->maximum_ops_per_instruction
)
20671 * m_line_header
->minimum_instruction_length
);
20672 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20673 m_op_index
= ((m_op_index
+ adj_opcode_d
)
20674 % m_line_header
->maximum_ops_per_instruction
);
20676 int line_delta
= m_line_header
->line_base
+ adj_opcode_r
;
20677 advance_line (line_delta
);
20678 record_line (false);
20679 m_discriminator
= 0;
20683 lnp_state_machine::handle_set_file (file_name_index file
)
20687 const file_entry
*fe
= current_file ();
20689 dwarf2_debug_line_missing_file_complaint ();
20690 else if (m_record_lines_p
)
20692 const char *dir
= fe
->include_dir (m_line_header
);
20694 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20695 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20696 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
20701 lnp_state_machine::handle_const_add_pc ()
20704 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
20707 = (((m_op_index
+ adjust
)
20708 / m_line_header
->maximum_ops_per_instruction
)
20709 * m_line_header
->minimum_instruction_length
);
20711 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20712 m_op_index
= ((m_op_index
+ adjust
)
20713 % m_line_header
->maximum_ops_per_instruction
);
20716 /* Return non-zero if we should add LINE to the line number table.
20717 LINE is the line to add, LAST_LINE is the last line that was added,
20718 LAST_SUBFILE is the subfile for LAST_LINE.
20719 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
20720 had a non-zero discriminator.
20722 We have to be careful in the presence of discriminators.
20723 E.g., for this line:
20725 for (i = 0; i < 100000; i++);
20727 clang can emit four line number entries for that one line,
20728 each with a different discriminator.
20729 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20731 However, we want gdb to coalesce all four entries into one.
20732 Otherwise the user could stepi into the middle of the line and
20733 gdb would get confused about whether the pc really was in the
20734 middle of the line.
20736 Things are further complicated by the fact that two consecutive
20737 line number entries for the same line is a heuristic used by gcc
20738 to denote the end of the prologue. So we can't just discard duplicate
20739 entries, we have to be selective about it. The heuristic we use is
20740 that we only collapse consecutive entries for the same line if at least
20741 one of those entries has a non-zero discriminator. PR 17276.
20743 Note: Addresses in the line number state machine can never go backwards
20744 within one sequence, thus this coalescing is ok. */
20747 dwarf_record_line_p (struct dwarf2_cu
*cu
,
20748 unsigned int line
, unsigned int last_line
,
20749 int line_has_non_zero_discriminator
,
20750 struct subfile
*last_subfile
)
20752 if (cu
->get_builder ()->get_current_subfile () != last_subfile
)
20754 if (line
!= last_line
)
20756 /* Same line for the same file that we've seen already.
20757 As a last check, for pr 17276, only record the line if the line
20758 has never had a non-zero discriminator. */
20759 if (!line_has_non_zero_discriminator
)
20764 /* Use the CU's builder to record line number LINE beginning at
20765 address ADDRESS in the line table of subfile SUBFILE. */
20768 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20769 unsigned int line
, CORE_ADDR address
, bool is_stmt
,
20770 struct dwarf2_cu
*cu
)
20772 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20774 if (dwarf_line_debug
)
20776 fprintf_unfiltered (gdb_stdlog
,
20777 "Recording line %u, file %s, address %s\n",
20778 line
, lbasename (subfile
->name
),
20779 paddress (gdbarch
, address
));
20783 cu
->get_builder ()->record_line (subfile
, line
, addr
, is_stmt
);
20786 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20787 Mark the end of a set of line number records.
20788 The arguments are the same as for dwarf_record_line_1.
20789 If SUBFILE is NULL the request is ignored. */
20792 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20793 CORE_ADDR address
, struct dwarf2_cu
*cu
)
20795 if (subfile
== NULL
)
20798 if (dwarf_line_debug
)
20800 fprintf_unfiltered (gdb_stdlog
,
20801 "Finishing current line, file %s, address %s\n",
20802 lbasename (subfile
->name
),
20803 paddress (gdbarch
, address
));
20806 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, true, cu
);
20810 lnp_state_machine::record_line (bool end_sequence
)
20812 if (dwarf_line_debug
)
20814 fprintf_unfiltered (gdb_stdlog
,
20815 "Processing actual line %u: file %u,"
20816 " address %s, is_stmt %u, discrim %u%s\n",
20818 paddress (m_gdbarch
, m_address
),
20819 m_is_stmt
, m_discriminator
,
20820 (end_sequence
? "\t(end sequence)" : ""));
20823 file_entry
*fe
= current_file ();
20826 dwarf2_debug_line_missing_file_complaint ();
20827 /* For now we ignore lines not starting on an instruction boundary.
20828 But not when processing end_sequence for compatibility with the
20829 previous version of the code. */
20830 else if (m_op_index
== 0 || end_sequence
)
20832 fe
->included_p
= 1;
20833 if (m_record_lines_p
)
20835 /* When we switch files we insert an end maker in the first file,
20836 switch to the second file and add a new line entry. The
20837 problem is that the end marker inserted in the first file will
20838 discard any previous line entries at the same address. If the
20839 line entries in the first file are marked as is-stmt, while
20840 the new line in the second file is non-stmt, then this means
20841 the end marker will discard is-stmt lines so we can have a
20842 non-stmt line. This means that there are less addresses at
20843 which the user can insert a breakpoint.
20845 To improve this we track the last address in m_last_address,
20846 and whether we have seen an is-stmt at this address. Then
20847 when switching files, if we have seen a stmt at the current
20848 address, and we are switching to create a non-stmt line, then
20849 discard the new line. */
20851 = m_last_subfile
!= m_cu
->get_builder ()->get_current_subfile ();
20852 bool ignore_this_line
20853 = ((file_changed
&& !end_sequence
&& m_last_address
== m_address
20854 && !m_is_stmt
&& m_stmt_at_address
)
20855 || (!end_sequence
&& m_line
== 0));
20857 if ((file_changed
&& !ignore_this_line
) || end_sequence
)
20859 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
20860 m_currently_recording_lines
? m_cu
: nullptr);
20863 if (!end_sequence
&& !ignore_this_line
)
20865 bool is_stmt
= producer_is_codewarrior (m_cu
) || m_is_stmt
;
20867 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
20868 m_line_has_non_zero_discriminator
,
20871 buildsym_compunit
*builder
= m_cu
->get_builder ();
20872 dwarf_record_line_1 (m_gdbarch
,
20873 builder
->get_current_subfile (),
20874 m_line
, m_address
, is_stmt
,
20875 m_currently_recording_lines
? m_cu
: nullptr);
20877 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20878 m_last_line
= m_line
;
20883 /* Track whether we have seen any m_is_stmt true at m_address in case we
20884 have multiple line table entries all at m_address. */
20885 if (m_last_address
!= m_address
)
20887 m_stmt_at_address
= false;
20888 m_last_address
= m_address
;
20890 m_stmt_at_address
|= m_is_stmt
;
20893 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
20894 line_header
*lh
, bool record_lines_p
)
20898 m_record_lines_p
= record_lines_p
;
20899 m_line_header
= lh
;
20901 m_currently_recording_lines
= true;
20903 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20904 was a line entry for it so that the backend has a chance to adjust it
20905 and also record it in case it needs it. This is currently used by MIPS
20906 code, cf. `mips_adjust_dwarf2_line'. */
20907 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20908 m_is_stmt
= lh
->default_is_stmt
;
20909 m_discriminator
= 0;
20911 m_last_address
= m_address
;
20912 m_stmt_at_address
= false;
20916 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20917 const gdb_byte
*line_ptr
,
20918 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
20920 /* Linkers resolve a symbolic relocation referencing a GC'd function to 0 or
20921 -1. If ADDRESS is 0, ignoring the opcode will err if the text section is
20922 located at 0x0. In this case, additionally check that if
20923 ADDRESS < UNRELOCATED_LOWPC. */
20925 if ((address
== 0 && address
< unrelocated_lowpc
)
20926 || address
== (CORE_ADDR
) -1)
20928 /* This line table is for a function which has been
20929 GCd by the linker. Ignore it. PR gdb/12528 */
20931 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
20932 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20934 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20935 line_offset
, objfile_name (objfile
));
20936 m_currently_recording_lines
= false;
20937 /* Note: m_currently_recording_lines is left as false until we see
20938 DW_LNE_end_sequence. */
20942 /* Subroutine of dwarf_decode_lines to simplify it.
20943 Process the line number information in LH.
20944 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20945 program in order to set included_p for every referenced header. */
20948 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20949 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20951 const gdb_byte
*line_ptr
, *extended_end
;
20952 const gdb_byte
*line_end
;
20953 unsigned int bytes_read
, extended_len
;
20954 unsigned char op_code
, extended_op
;
20955 CORE_ADDR baseaddr
;
20956 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
20957 bfd
*abfd
= objfile
->obfd
;
20958 struct gdbarch
*gdbarch
= objfile
->arch ();
20959 /* True if we're recording line info (as opposed to building partial
20960 symtabs and just interested in finding include files mentioned by
20961 the line number program). */
20962 bool record_lines_p
= !decode_for_pst_p
;
20964 baseaddr
= objfile
->text_section_offset ();
20966 line_ptr
= lh
->statement_program_start
;
20967 line_end
= lh
->statement_program_end
;
20969 /* Read the statement sequences until there's nothing left. */
20970 while (line_ptr
< line_end
)
20972 /* The DWARF line number program state machine. Reset the state
20973 machine at the start of each sequence. */
20974 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
20975 bool end_sequence
= false;
20977 if (record_lines_p
)
20979 /* Start a subfile for the current file of the state
20981 const file_entry
*fe
= state_machine
.current_file ();
20984 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
20987 /* Decode the table. */
20988 while (line_ptr
< line_end
&& !end_sequence
)
20990 op_code
= read_1_byte (abfd
, line_ptr
);
20993 if (op_code
>= lh
->opcode_base
)
20995 /* Special opcode. */
20996 state_machine
.handle_special_opcode (op_code
);
20998 else switch (op_code
)
21000 case DW_LNS_extended_op
:
21001 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
21003 line_ptr
+= bytes_read
;
21004 extended_end
= line_ptr
+ extended_len
;
21005 extended_op
= read_1_byte (abfd
, line_ptr
);
21007 if (DW_LNE_lo_user
<= extended_op
21008 && extended_op
<= DW_LNE_hi_user
)
21010 /* Vendor extension, ignore. */
21011 line_ptr
= extended_end
;
21014 switch (extended_op
)
21016 case DW_LNE_end_sequence
:
21017 state_machine
.handle_end_sequence ();
21018 end_sequence
= true;
21020 case DW_LNE_set_address
:
21023 = cu
->header
.read_address (abfd
, line_ptr
, &bytes_read
);
21024 line_ptr
+= bytes_read
;
21026 state_machine
.check_line_address (cu
, line_ptr
,
21027 lowpc
- baseaddr
, address
);
21028 state_machine
.handle_set_address (baseaddr
, address
);
21031 case DW_LNE_define_file
:
21033 const char *cur_file
;
21034 unsigned int mod_time
, length
;
21037 cur_file
= read_direct_string (abfd
, line_ptr
,
21039 line_ptr
+= bytes_read
;
21040 dindex
= (dir_index
)
21041 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21042 line_ptr
+= bytes_read
;
21044 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21045 line_ptr
+= bytes_read
;
21047 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21048 line_ptr
+= bytes_read
;
21049 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
21052 case DW_LNE_set_discriminator
:
21054 /* The discriminator is not interesting to the
21055 debugger; just ignore it. We still need to
21056 check its value though:
21057 if there are consecutive entries for the same
21058 (non-prologue) line we want to coalesce them.
21061 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21062 line_ptr
+= bytes_read
;
21064 state_machine
.handle_set_discriminator (discr
);
21068 complaint (_("mangled .debug_line section"));
21071 /* Make sure that we parsed the extended op correctly. If e.g.
21072 we expected a different address size than the producer used,
21073 we may have read the wrong number of bytes. */
21074 if (line_ptr
!= extended_end
)
21076 complaint (_("mangled .debug_line section"));
21081 state_machine
.handle_copy ();
21083 case DW_LNS_advance_pc
:
21086 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21087 line_ptr
+= bytes_read
;
21089 state_machine
.handle_advance_pc (adjust
);
21092 case DW_LNS_advance_line
:
21095 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
21096 line_ptr
+= bytes_read
;
21098 state_machine
.handle_advance_line (line_delta
);
21101 case DW_LNS_set_file
:
21103 file_name_index file
21104 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
21106 line_ptr
+= bytes_read
;
21108 state_machine
.handle_set_file (file
);
21111 case DW_LNS_set_column
:
21112 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21113 line_ptr
+= bytes_read
;
21115 case DW_LNS_negate_stmt
:
21116 state_machine
.handle_negate_stmt ();
21118 case DW_LNS_set_basic_block
:
21120 /* Add to the address register of the state machine the
21121 address increment value corresponding to special opcode
21122 255. I.e., this value is scaled by the minimum
21123 instruction length since special opcode 255 would have
21124 scaled the increment. */
21125 case DW_LNS_const_add_pc
:
21126 state_machine
.handle_const_add_pc ();
21128 case DW_LNS_fixed_advance_pc
:
21130 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
21133 state_machine
.handle_fixed_advance_pc (addr_adj
);
21138 /* Unknown standard opcode, ignore it. */
21141 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
21143 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21144 line_ptr
+= bytes_read
;
21151 dwarf2_debug_line_missing_end_sequence_complaint ();
21153 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
21154 in which case we still finish recording the last line). */
21155 state_machine
.record_line (true);
21159 /* Decode the Line Number Program (LNP) for the given line_header
21160 structure and CU. The actual information extracted and the type
21161 of structures created from the LNP depends on the value of PST.
21163 1. If PST is NULL, then this procedure uses the data from the program
21164 to create all necessary symbol tables, and their linetables.
21166 2. If PST is not NULL, this procedure reads the program to determine
21167 the list of files included by the unit represented by PST, and
21168 builds all the associated partial symbol tables.
21170 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
21171 It is used for relative paths in the line table.
21172 NOTE: When processing partial symtabs (pst != NULL),
21173 comp_dir == pst->dirname.
21175 NOTE: It is important that psymtabs have the same file name (via strcmp)
21176 as the corresponding symtab. Since COMP_DIR is not used in the name of the
21177 symtab we don't use it in the name of the psymtabs we create.
21178 E.g. expand_line_sal requires this when finding psymtabs to expand.
21179 A good testcase for this is mb-inline.exp.
21181 LOWPC is the lowest address in CU (or 0 if not known).
21183 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
21184 for its PC<->lines mapping information. Otherwise only the filename
21185 table is read in. */
21188 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
21189 struct dwarf2_cu
*cu
, dwarf2_psymtab
*pst
,
21190 CORE_ADDR lowpc
, int decode_mapping
)
21192 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21193 const int decode_for_pst_p
= (pst
!= NULL
);
21195 if (decode_mapping
)
21196 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
21198 if (decode_for_pst_p
)
21200 /* Now that we're done scanning the Line Header Program, we can
21201 create the psymtab of each included file. */
21202 for (auto &file_entry
: lh
->file_names ())
21203 if (file_entry
.included_p
== 1)
21205 gdb::unique_xmalloc_ptr
<char> name_holder
;
21206 const char *include_name
=
21207 psymtab_include_file_name (lh
, file_entry
, pst
,
21208 comp_dir
, &name_holder
);
21209 if (include_name
!= NULL
)
21210 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
21215 /* Make sure a symtab is created for every file, even files
21216 which contain only variables (i.e. no code with associated
21218 buildsym_compunit
*builder
= cu
->get_builder ();
21219 struct compunit_symtab
*cust
= builder
->get_compunit_symtab ();
21221 for (auto &fe
: lh
->file_names ())
21223 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
21224 if (builder
->get_current_subfile ()->symtab
== NULL
)
21226 builder
->get_current_subfile ()->symtab
21227 = allocate_symtab (cust
,
21228 builder
->get_current_subfile ()->name
);
21230 fe
.symtab
= builder
->get_current_subfile ()->symtab
;
21235 /* Start a subfile for DWARF. FILENAME is the name of the file and
21236 DIRNAME the name of the source directory which contains FILENAME
21237 or NULL if not known.
21238 This routine tries to keep line numbers from identical absolute and
21239 relative file names in a common subfile.
21241 Using the `list' example from the GDB testsuite, which resides in
21242 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
21243 of /srcdir/list0.c yields the following debugging information for list0.c:
21245 DW_AT_name: /srcdir/list0.c
21246 DW_AT_comp_dir: /compdir
21247 files.files[0].name: list0.h
21248 files.files[0].dir: /srcdir
21249 files.files[1].name: list0.c
21250 files.files[1].dir: /srcdir
21252 The line number information for list0.c has to end up in a single
21253 subfile, so that `break /srcdir/list0.c:1' works as expected.
21254 start_subfile will ensure that this happens provided that we pass the
21255 concatenation of files.files[1].dir and files.files[1].name as the
21259 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
21260 const char *dirname
)
21262 gdb::unique_xmalloc_ptr
<char> copy
;
21264 /* In order not to lose the line information directory,
21265 we concatenate it to the filename when it makes sense.
21266 Note that the Dwarf3 standard says (speaking of filenames in line
21267 information): ``The directory index is ignored for file names
21268 that represent full path names''. Thus ignoring dirname in the
21269 `else' branch below isn't an issue. */
21271 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
21273 copy
.reset (concat (dirname
, SLASH_STRING
, filename
, (char *) NULL
));
21274 filename
= copy
.get ();
21277 cu
->get_builder ()->start_subfile (filename
);
21280 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
21281 buildsym_compunit constructor. */
21283 struct compunit_symtab
*
21284 dwarf2_cu::start_symtab (const char *name
, const char *comp_dir
,
21287 gdb_assert (m_builder
== nullptr);
21289 m_builder
.reset (new struct buildsym_compunit
21290 (this->per_objfile
->objfile
,
21291 name
, comp_dir
, language
, low_pc
));
21293 list_in_scope
= get_builder ()->get_file_symbols ();
21295 get_builder ()->record_debugformat ("DWARF 2");
21296 get_builder ()->record_producer (producer
);
21298 processing_has_namespace_info
= false;
21300 return get_builder ()->get_compunit_symtab ();
21304 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
21305 struct dwarf2_cu
*cu
)
21307 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21308 struct comp_unit_head
*cu_header
= &cu
->header
;
21310 /* NOTE drow/2003-01-30: There used to be a comment and some special
21311 code here to turn a symbol with DW_AT_external and a
21312 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
21313 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
21314 with some versions of binutils) where shared libraries could have
21315 relocations against symbols in their debug information - the
21316 minimal symbol would have the right address, but the debug info
21317 would not. It's no longer necessary, because we will explicitly
21318 apply relocations when we read in the debug information now. */
21320 /* A DW_AT_location attribute with no contents indicates that a
21321 variable has been optimized away. */
21322 if (attr
->form_is_block () && attr
->as_block ()->size
== 0)
21324 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21328 /* Handle one degenerate form of location expression specially, to
21329 preserve GDB's previous behavior when section offsets are
21330 specified. If this is just a DW_OP_addr, DW_OP_addrx, or
21331 DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */
21333 if (attr
->form_is_block ())
21335 struct dwarf_block
*block
= attr
->as_block ();
21337 if ((block
->data
[0] == DW_OP_addr
21338 && block
->size
== 1 + cu_header
->addr_size
)
21339 || ((block
->data
[0] == DW_OP_GNU_addr_index
21340 || block
->data
[0] == DW_OP_addrx
)
21342 == 1 + leb128_size (&block
->data
[1]))))
21344 unsigned int dummy
;
21346 if (block
->data
[0] == DW_OP_addr
)
21347 SET_SYMBOL_VALUE_ADDRESS
21348 (sym
, cu
->header
.read_address (objfile
->obfd
,
21352 SET_SYMBOL_VALUE_ADDRESS
21353 (sym
, read_addr_index_from_leb128 (cu
, block
->data
+ 1,
21355 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
21356 fixup_symbol_section (sym
, objfile
);
21357 SET_SYMBOL_VALUE_ADDRESS
21359 SYMBOL_VALUE_ADDRESS (sym
)
21360 + objfile
->section_offsets
[SYMBOL_SECTION (sym
)]);
21365 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
21366 expression evaluator, and use LOC_COMPUTED only when necessary
21367 (i.e. when the value of a register or memory location is
21368 referenced, or a thread-local block, etc.). Then again, it might
21369 not be worthwhile. I'm assuming that it isn't unless performance
21370 or memory numbers show me otherwise. */
21372 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
21374 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
21375 cu
->has_loclist
= true;
21378 /* Given a pointer to a DWARF information entry, figure out if we need
21379 to make a symbol table entry for it, and if so, create a new entry
21380 and return a pointer to it.
21381 If TYPE is NULL, determine symbol type from the die, otherwise
21382 used the passed type.
21383 If SPACE is not NULL, use it to hold the new symbol. If it is
21384 NULL, allocate a new symbol on the objfile's obstack. */
21386 static struct symbol
*
21387 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
21388 struct symbol
*space
)
21390 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
21391 struct objfile
*objfile
= per_objfile
->objfile
;
21392 struct gdbarch
*gdbarch
= objfile
->arch ();
21393 struct symbol
*sym
= NULL
;
21395 struct attribute
*attr
= NULL
;
21396 struct attribute
*attr2
= NULL
;
21397 CORE_ADDR baseaddr
;
21398 struct pending
**list_to_add
= NULL
;
21400 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
21402 baseaddr
= objfile
->text_section_offset ();
21404 name
= dwarf2_name (die
, cu
);
21407 int suppress_add
= 0;
21412 sym
= new (&objfile
->objfile_obstack
) symbol
;
21413 OBJSTAT (objfile
, n_syms
++);
21415 /* Cache this symbol's name and the name's demangled form (if any). */
21416 sym
->set_language (cu
->language
, &objfile
->objfile_obstack
);
21417 /* Fortran does not have mangling standard and the mangling does differ
21418 between gfortran, iFort etc. */
21419 const char *physname
21420 = (cu
->language
== language_fortran
21421 ? dwarf2_full_name (name
, die
, cu
)
21422 : dwarf2_physname (name
, die
, cu
));
21423 const char *linkagename
= dw2_linkage_name (die
, cu
);
21425 if (linkagename
== nullptr || cu
->language
== language_ada
)
21426 sym
->set_linkage_name (physname
);
21429 sym
->set_demangled_name (physname
, &objfile
->objfile_obstack
);
21430 sym
->set_linkage_name (linkagename
);
21433 /* Default assumptions.
21434 Use the passed type or decode it from the die. */
21435 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21436 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21438 SYMBOL_TYPE (sym
) = type
;
21440 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
21441 attr
= dwarf2_attr (die
,
21442 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
21444 if (attr
!= nullptr)
21446 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
21449 attr
= dwarf2_attr (die
,
21450 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
21452 if (attr
!= nullptr)
21454 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
21455 struct file_entry
*fe
;
21457 if (cu
->line_header
!= NULL
)
21458 fe
= cu
->line_header
->file_name_at (file_index
);
21463 complaint (_("file index out of range"));
21465 symbol_set_symtab (sym
, fe
->symtab
);
21471 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
21472 if (attr
!= nullptr)
21476 addr
= attr
->as_address ();
21477 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
21478 SET_SYMBOL_VALUE_ADDRESS (sym
, addr
);
21479 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
21482 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21483 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
21484 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
21485 add_symbol_to_list (sym
, cu
->list_in_scope
);
21487 case DW_TAG_subprogram
:
21488 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21490 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21491 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21492 if ((attr2
&& (DW_UNSND (attr2
) != 0))
21493 || cu
->language
== language_ada
21494 || cu
->language
== language_fortran
)
21496 /* Subprograms marked external are stored as a global symbol.
21497 Ada and Fortran subprograms, whether marked external or
21498 not, are always stored as a global symbol, because we want
21499 to be able to access them globally. For instance, we want
21500 to be able to break on a nested subprogram without having
21501 to specify the context. */
21502 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21506 list_to_add
= cu
->list_in_scope
;
21509 case DW_TAG_inlined_subroutine
:
21510 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21512 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21513 SYMBOL_INLINED (sym
) = 1;
21514 list_to_add
= cu
->list_in_scope
;
21516 case DW_TAG_template_value_param
:
21518 /* Fall through. */
21519 case DW_TAG_constant
:
21520 case DW_TAG_variable
:
21521 case DW_TAG_member
:
21522 /* Compilation with minimal debug info may result in
21523 variables with missing type entries. Change the
21524 misleading `void' type to something sensible. */
21525 if (SYMBOL_TYPE (sym
)->code () == TYPE_CODE_VOID
)
21526 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
21528 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21529 /* In the case of DW_TAG_member, we should only be called for
21530 static const members. */
21531 if (die
->tag
== DW_TAG_member
)
21533 /* dwarf2_add_field uses die_is_declaration,
21534 so we do the same. */
21535 gdb_assert (die_is_declaration (die
, cu
));
21538 if (attr
!= nullptr)
21540 dwarf2_const_value (attr
, sym
, cu
);
21541 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21544 if (attr2
&& (DW_UNSND (attr2
) != 0))
21545 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21547 list_to_add
= cu
->list_in_scope
;
21551 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21552 if (attr
!= nullptr)
21554 var_decode_location (attr
, sym
, cu
);
21555 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21557 /* Fortran explicitly imports any global symbols to the local
21558 scope by DW_TAG_common_block. */
21559 if (cu
->language
== language_fortran
&& die
->parent
21560 && die
->parent
->tag
== DW_TAG_common_block
)
21563 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21564 && SYMBOL_VALUE_ADDRESS (sym
) == 0
21565 && !per_objfile
->per_bfd
->has_section_at_zero
)
21567 /* When a static variable is eliminated by the linker,
21568 the corresponding debug information is not stripped
21569 out, but the variable address is set to null;
21570 do not add such variables into symbol table. */
21572 else if (attr2
&& (DW_UNSND (attr2
) != 0))
21574 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21575 && (objfile
->flags
& OBJF_MAINLINE
) == 0
21576 && per_objfile
->per_bfd
->can_copy
)
21578 /* A global static variable might be subject to
21579 copy relocation. We first check for a local
21580 minsym, though, because maybe the symbol was
21581 marked hidden, in which case this would not
21583 bound_minimal_symbol found
21584 = (lookup_minimal_symbol_linkage
21585 (sym
->linkage_name (), objfile
));
21586 if (found
.minsym
!= nullptr)
21587 sym
->maybe_copied
= 1;
21590 /* A variable with DW_AT_external is never static,
21591 but it may be block-scoped. */
21593 = ((cu
->list_in_scope
21594 == cu
->get_builder ()->get_file_symbols ())
21595 ? cu
->get_builder ()->get_global_symbols ()
21596 : cu
->list_in_scope
);
21599 list_to_add
= cu
->list_in_scope
;
21603 /* We do not know the address of this symbol.
21604 If it is an external symbol and we have type information
21605 for it, enter the symbol as a LOC_UNRESOLVED symbol.
21606 The address of the variable will then be determined from
21607 the minimal symbol table whenever the variable is
21609 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21611 /* Fortran explicitly imports any global symbols to the local
21612 scope by DW_TAG_common_block. */
21613 if (cu
->language
== language_fortran
&& die
->parent
21614 && die
->parent
->tag
== DW_TAG_common_block
)
21616 /* SYMBOL_CLASS doesn't matter here because
21617 read_common_block is going to reset it. */
21619 list_to_add
= cu
->list_in_scope
;
21621 else if (attr2
&& (DW_UNSND (attr2
) != 0)
21622 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
21624 /* A variable with DW_AT_external is never static, but it
21625 may be block-scoped. */
21627 = ((cu
->list_in_scope
21628 == cu
->get_builder ()->get_file_symbols ())
21629 ? cu
->get_builder ()->get_global_symbols ()
21630 : cu
->list_in_scope
);
21632 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21634 else if (!die_is_declaration (die
, cu
))
21636 /* Use the default LOC_OPTIMIZED_OUT class. */
21637 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
21639 list_to_add
= cu
->list_in_scope
;
21643 case DW_TAG_formal_parameter
:
21645 /* If we are inside a function, mark this as an argument. If
21646 not, we might be looking at an argument to an inlined function
21647 when we do not have enough information to show inlined frames;
21648 pretend it's a local variable in that case so that the user can
21650 struct context_stack
*curr
21651 = cu
->get_builder ()->get_current_context_stack ();
21652 if (curr
!= nullptr && curr
->name
!= nullptr)
21653 SYMBOL_IS_ARGUMENT (sym
) = 1;
21654 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21655 if (attr
!= nullptr)
21657 var_decode_location (attr
, sym
, cu
);
21659 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21660 if (attr
!= nullptr)
21662 dwarf2_const_value (attr
, sym
, cu
);
21665 list_to_add
= cu
->list_in_scope
;
21668 case DW_TAG_unspecified_parameters
:
21669 /* From varargs functions; gdb doesn't seem to have any
21670 interest in this information, so just ignore it for now.
21673 case DW_TAG_template_type_param
:
21675 /* Fall through. */
21676 case DW_TAG_class_type
:
21677 case DW_TAG_interface_type
:
21678 case DW_TAG_structure_type
:
21679 case DW_TAG_union_type
:
21680 case DW_TAG_set_type
:
21681 case DW_TAG_enumeration_type
:
21682 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21683 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
21686 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
21687 really ever be static objects: otherwise, if you try
21688 to, say, break of a class's method and you're in a file
21689 which doesn't mention that class, it won't work unless
21690 the check for all static symbols in lookup_symbol_aux
21691 saves you. See the OtherFileClass tests in
21692 gdb.c++/namespace.exp. */
21696 buildsym_compunit
*builder
= cu
->get_builder ();
21698 = (cu
->list_in_scope
== builder
->get_file_symbols ()
21699 && cu
->language
== language_cplus
21700 ? builder
->get_global_symbols ()
21701 : cu
->list_in_scope
);
21703 /* The semantics of C++ state that "struct foo {
21704 ... }" also defines a typedef for "foo". */
21705 if (cu
->language
== language_cplus
21706 || cu
->language
== language_ada
21707 || cu
->language
== language_d
21708 || cu
->language
== language_rust
)
21710 /* The symbol's name is already allocated along
21711 with this objfile, so we don't need to
21712 duplicate it for the type. */
21713 if (SYMBOL_TYPE (sym
)->name () == 0)
21714 SYMBOL_TYPE (sym
)->set_name (sym
->search_name ());
21719 case DW_TAG_typedef
:
21720 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21721 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21722 list_to_add
= cu
->list_in_scope
;
21724 case DW_TAG_base_type
:
21725 case DW_TAG_subrange_type
:
21726 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21727 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21728 list_to_add
= cu
->list_in_scope
;
21730 case DW_TAG_enumerator
:
21731 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21732 if (attr
!= nullptr)
21734 dwarf2_const_value (attr
, sym
, cu
);
21737 /* NOTE: carlton/2003-11-10: See comment above in the
21738 DW_TAG_class_type, etc. block. */
21741 = (cu
->list_in_scope
== cu
->get_builder ()->get_file_symbols ()
21742 && cu
->language
== language_cplus
21743 ? cu
->get_builder ()->get_global_symbols ()
21744 : cu
->list_in_scope
);
21747 case DW_TAG_imported_declaration
:
21748 case DW_TAG_namespace
:
21749 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21750 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21752 case DW_TAG_module
:
21753 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21754 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
21755 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21757 case DW_TAG_common_block
:
21758 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
21759 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
21760 add_symbol_to_list (sym
, cu
->list_in_scope
);
21763 /* Not a tag we recognize. Hopefully we aren't processing
21764 trash data, but since we must specifically ignore things
21765 we don't recognize, there is nothing else we should do at
21767 complaint (_("unsupported tag: '%s'"),
21768 dwarf_tag_name (die
->tag
));
21774 sym
->hash_next
= objfile
->template_symbols
;
21775 objfile
->template_symbols
= sym
;
21776 list_to_add
= NULL
;
21779 if (list_to_add
!= NULL
)
21780 add_symbol_to_list (sym
, list_to_add
);
21782 /* For the benefit of old versions of GCC, check for anonymous
21783 namespaces based on the demangled name. */
21784 if (!cu
->processing_has_namespace_info
21785 && cu
->language
== language_cplus
)
21786 cp_scan_for_anonymous_namespaces (cu
->get_builder (), sym
, objfile
);
21791 /* Given an attr with a DW_FORM_dataN value in host byte order,
21792 zero-extend it as appropriate for the symbol's type. The DWARF
21793 standard (v4) is not entirely clear about the meaning of using
21794 DW_FORM_dataN for a constant with a signed type, where the type is
21795 wider than the data. The conclusion of a discussion on the DWARF
21796 list was that this is unspecified. We choose to always zero-extend
21797 because that is the interpretation long in use by GCC. */
21800 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21801 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21803 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21804 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21805 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21806 LONGEST l
= DW_UNSND (attr
);
21808 if (bits
< sizeof (*value
) * 8)
21810 l
&= ((LONGEST
) 1 << bits
) - 1;
21813 else if (bits
== sizeof (*value
) * 8)
21817 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21818 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21825 /* Read a constant value from an attribute. Either set *VALUE, or if
21826 the value does not fit in *VALUE, set *BYTES - either already
21827 allocated on the objfile obstack, or newly allocated on OBSTACK,
21828 or, set *BATON, if we translated the constant to a location
21832 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21833 const char *name
, struct obstack
*obstack
,
21834 struct dwarf2_cu
*cu
,
21835 LONGEST
*value
, const gdb_byte
**bytes
,
21836 struct dwarf2_locexpr_baton
**baton
)
21838 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
21839 struct objfile
*objfile
= per_objfile
->objfile
;
21840 struct comp_unit_head
*cu_header
= &cu
->header
;
21841 struct dwarf_block
*blk
;
21842 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21843 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21849 switch (attr
->form
)
21852 case DW_FORM_addrx
:
21853 case DW_FORM_GNU_addr_index
:
21857 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21858 dwarf2_const_value_length_mismatch_complaint (name
,
21859 cu_header
->addr_size
,
21860 TYPE_LENGTH (type
));
21861 /* Symbols of this form are reasonably rare, so we just
21862 piggyback on the existing location code rather than writing
21863 a new implementation of symbol_computed_ops. */
21864 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21865 (*baton
)->per_objfile
= per_objfile
;
21866 (*baton
)->per_cu
= cu
->per_cu
;
21867 gdb_assert ((*baton
)->per_cu
);
21869 (*baton
)->size
= 2 + cu_header
->addr_size
;
21870 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21871 (*baton
)->data
= data
;
21873 data
[0] = DW_OP_addr
;
21874 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21875 byte_order
, attr
->as_address ());
21876 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21879 case DW_FORM_string
:
21882 case DW_FORM_GNU_str_index
:
21883 case DW_FORM_GNU_strp_alt
:
21884 /* The string is already allocated on the objfile obstack, point
21886 *bytes
= (const gdb_byte
*) attr
->as_string ();
21888 case DW_FORM_block1
:
21889 case DW_FORM_block2
:
21890 case DW_FORM_block4
:
21891 case DW_FORM_block
:
21892 case DW_FORM_exprloc
:
21893 case DW_FORM_data16
:
21894 blk
= attr
->as_block ();
21895 if (TYPE_LENGTH (type
) != blk
->size
)
21896 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21897 TYPE_LENGTH (type
));
21898 *bytes
= blk
->data
;
21901 /* The DW_AT_const_value attributes are supposed to carry the
21902 symbol's value "represented as it would be on the target
21903 architecture." By the time we get here, it's already been
21904 converted to host endianness, so we just need to sign- or
21905 zero-extend it as appropriate. */
21906 case DW_FORM_data1
:
21907 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21909 case DW_FORM_data2
:
21910 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21912 case DW_FORM_data4
:
21913 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21915 case DW_FORM_data8
:
21916 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21919 case DW_FORM_sdata
:
21920 case DW_FORM_implicit_const
:
21921 *value
= attr
->as_signed ();
21924 case DW_FORM_udata
:
21925 *value
= DW_UNSND (attr
);
21929 complaint (_("unsupported const value attribute form: '%s'"),
21930 dwarf_form_name (attr
->form
));
21937 /* Copy constant value from an attribute to a symbol. */
21940 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21941 struct dwarf2_cu
*cu
)
21943 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21945 const gdb_byte
*bytes
;
21946 struct dwarf2_locexpr_baton
*baton
;
21948 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21949 sym
->print_name (),
21950 &objfile
->objfile_obstack
, cu
,
21951 &value
, &bytes
, &baton
);
21955 SYMBOL_LOCATION_BATON (sym
) = baton
;
21956 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21958 else if (bytes
!= NULL
)
21960 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21961 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21965 SYMBOL_VALUE (sym
) = value
;
21966 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21970 /* Return the type of the die in question using its DW_AT_type attribute. */
21972 static struct type
*
21973 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21975 struct attribute
*type_attr
;
21977 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21980 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
21981 /* A missing DW_AT_type represents a void type. */
21982 return objfile_type (objfile
)->builtin_void
;
21985 return lookup_die_type (die
, type_attr
, cu
);
21988 /* True iff CU's producer generates GNAT Ada auxiliary information
21989 that allows to find parallel types through that information instead
21990 of having to do expensive parallel lookups by type name. */
21993 need_gnat_info (struct dwarf2_cu
*cu
)
21995 /* Assume that the Ada compiler was GNAT, which always produces
21996 the auxiliary information. */
21997 return (cu
->language
== language_ada
);
22000 /* Return the auxiliary type of the die in question using its
22001 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
22002 attribute is not present. */
22004 static struct type
*
22005 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22007 struct attribute
*type_attr
;
22009 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
22013 return lookup_die_type (die
, type_attr
, cu
);
22016 /* If DIE has a descriptive_type attribute, then set the TYPE's
22017 descriptive type accordingly. */
22020 set_descriptive_type (struct type
*type
, struct die_info
*die
,
22021 struct dwarf2_cu
*cu
)
22023 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
22025 if (descriptive_type
)
22027 ALLOCATE_GNAT_AUX_TYPE (type
);
22028 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
22032 /* Return the containing type of the die in question using its
22033 DW_AT_containing_type attribute. */
22035 static struct type
*
22036 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22038 struct attribute
*type_attr
;
22039 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
22041 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
22043 error (_("Dwarf Error: Problem turning containing type into gdb type "
22044 "[in module %s]"), objfile_name (objfile
));
22046 return lookup_die_type (die
, type_attr
, cu
);
22049 /* Return an error marker type to use for the ill formed type in DIE/CU. */
22051 static struct type
*
22052 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
22054 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
22055 struct objfile
*objfile
= per_objfile
->objfile
;
22058 std::string message
22059 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
22060 objfile_name (objfile
),
22061 sect_offset_str (cu
->header
.sect_off
),
22062 sect_offset_str (die
->sect_off
));
22063 saved
= obstack_strdup (&objfile
->objfile_obstack
, message
);
22065 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
22068 /* Look up the type of DIE in CU using its type attribute ATTR.
22069 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
22070 DW_AT_containing_type.
22071 If there is no type substitute an error marker. */
22073 static struct type
*
22074 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
22075 struct dwarf2_cu
*cu
)
22077 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
22078 struct objfile
*objfile
= per_objfile
->objfile
;
22079 struct type
*this_type
;
22081 gdb_assert (attr
->name
== DW_AT_type
22082 || attr
->name
== DW_AT_GNAT_descriptive_type
22083 || attr
->name
== DW_AT_containing_type
);
22085 /* First see if we have it cached. */
22087 if (attr
->form
== DW_FORM_GNU_ref_alt
)
22089 struct dwarf2_per_cu_data
*per_cu
;
22090 sect_offset sect_off
= attr
->get_ref_die_offset ();
22092 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1, per_objfile
);
22093 this_type
= get_die_type_at_offset (sect_off
, per_cu
, per_objfile
);
22095 else if (attr
->form_is_ref ())
22097 sect_offset sect_off
= attr
->get_ref_die_offset ();
22099 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
, per_objfile
);
22101 else if (attr
->form
== DW_FORM_ref_sig8
)
22103 ULONGEST signature
= attr
->as_signature ();
22105 return get_signatured_type (die
, signature
, cu
);
22109 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
22110 " at %s [in module %s]"),
22111 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
22112 objfile_name (objfile
));
22113 return build_error_marker_type (cu
, die
);
22116 /* If not cached we need to read it in. */
22118 if (this_type
== NULL
)
22120 struct die_info
*type_die
= NULL
;
22121 struct dwarf2_cu
*type_cu
= cu
;
22123 if (attr
->form_is_ref ())
22124 type_die
= follow_die_ref (die
, attr
, &type_cu
);
22125 if (type_die
== NULL
)
22126 return build_error_marker_type (cu
, die
);
22127 /* If we find the type now, it's probably because the type came
22128 from an inter-CU reference and the type's CU got expanded before
22130 this_type
= read_type_die (type_die
, type_cu
);
22133 /* If we still don't have a type use an error marker. */
22135 if (this_type
== NULL
)
22136 return build_error_marker_type (cu
, die
);
22141 /* Return the type in DIE, CU.
22142 Returns NULL for invalid types.
22144 This first does a lookup in die_type_hash,
22145 and only reads the die in if necessary.
22147 NOTE: This can be called when reading in partial or full symbols. */
22149 static struct type
*
22150 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
22152 struct type
*this_type
;
22154 this_type
= get_die_type (die
, cu
);
22158 return read_type_die_1 (die
, cu
);
22161 /* Read the type in DIE, CU.
22162 Returns NULL for invalid types. */
22164 static struct type
*
22165 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
22167 struct type
*this_type
= NULL
;
22171 case DW_TAG_class_type
:
22172 case DW_TAG_interface_type
:
22173 case DW_TAG_structure_type
:
22174 case DW_TAG_union_type
:
22175 this_type
= read_structure_type (die
, cu
);
22177 case DW_TAG_enumeration_type
:
22178 this_type
= read_enumeration_type (die
, cu
);
22180 case DW_TAG_subprogram
:
22181 case DW_TAG_subroutine_type
:
22182 case DW_TAG_inlined_subroutine
:
22183 this_type
= read_subroutine_type (die
, cu
);
22185 case DW_TAG_array_type
:
22186 this_type
= read_array_type (die
, cu
);
22188 case DW_TAG_set_type
:
22189 this_type
= read_set_type (die
, cu
);
22191 case DW_TAG_pointer_type
:
22192 this_type
= read_tag_pointer_type (die
, cu
);
22194 case DW_TAG_ptr_to_member_type
:
22195 this_type
= read_tag_ptr_to_member_type (die
, cu
);
22197 case DW_TAG_reference_type
:
22198 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
22200 case DW_TAG_rvalue_reference_type
:
22201 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
22203 case DW_TAG_const_type
:
22204 this_type
= read_tag_const_type (die
, cu
);
22206 case DW_TAG_volatile_type
:
22207 this_type
= read_tag_volatile_type (die
, cu
);
22209 case DW_TAG_restrict_type
:
22210 this_type
= read_tag_restrict_type (die
, cu
);
22212 case DW_TAG_string_type
:
22213 this_type
= read_tag_string_type (die
, cu
);
22215 case DW_TAG_typedef
:
22216 this_type
= read_typedef (die
, cu
);
22218 case DW_TAG_subrange_type
:
22219 this_type
= read_subrange_type (die
, cu
);
22221 case DW_TAG_base_type
:
22222 this_type
= read_base_type (die
, cu
);
22224 case DW_TAG_unspecified_type
:
22225 this_type
= read_unspecified_type (die
, cu
);
22227 case DW_TAG_namespace
:
22228 this_type
= read_namespace_type (die
, cu
);
22230 case DW_TAG_module
:
22231 this_type
= read_module_type (die
, cu
);
22233 case DW_TAG_atomic_type
:
22234 this_type
= read_tag_atomic_type (die
, cu
);
22237 complaint (_("unexpected tag in read_type_die: '%s'"),
22238 dwarf_tag_name (die
->tag
));
22245 /* See if we can figure out if the class lives in a namespace. We do
22246 this by looking for a member function; its demangled name will
22247 contain namespace info, if there is any.
22248 Return the computed name or NULL.
22249 Space for the result is allocated on the objfile's obstack.
22250 This is the full-die version of guess_partial_die_structure_name.
22251 In this case we know DIE has no useful parent. */
22253 static const char *
22254 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22256 struct die_info
*spec_die
;
22257 struct dwarf2_cu
*spec_cu
;
22258 struct die_info
*child
;
22259 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
22262 spec_die
= die_specification (die
, &spec_cu
);
22263 if (spec_die
!= NULL
)
22269 for (child
= die
->child
;
22271 child
= child
->sibling
)
22273 if (child
->tag
== DW_TAG_subprogram
)
22275 const char *linkage_name
= dw2_linkage_name (child
, cu
);
22277 if (linkage_name
!= NULL
)
22279 gdb::unique_xmalloc_ptr
<char> actual_name
22280 (cu
->language_defn
->class_name_from_physname (linkage_name
));
22281 const char *name
= NULL
;
22283 if (actual_name
!= NULL
)
22285 const char *die_name
= dwarf2_name (die
, cu
);
22287 if (die_name
!= NULL
22288 && strcmp (die_name
, actual_name
.get ()) != 0)
22290 /* Strip off the class name from the full name.
22291 We want the prefix. */
22292 int die_name_len
= strlen (die_name
);
22293 int actual_name_len
= strlen (actual_name
.get ());
22294 const char *ptr
= actual_name
.get ();
22296 /* Test for '::' as a sanity check. */
22297 if (actual_name_len
> die_name_len
+ 2
22298 && ptr
[actual_name_len
- die_name_len
- 1] == ':')
22299 name
= obstack_strndup (
22300 &objfile
->per_bfd
->storage_obstack
,
22301 ptr
, actual_name_len
- die_name_len
- 2);
22312 /* GCC might emit a nameless typedef that has a linkage name. Determine the
22313 prefix part in such case. See
22314 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22316 static const char *
22317 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22319 struct attribute
*attr
;
22322 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
22323 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
22326 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
22329 attr
= dw2_linkage_name_attr (die
, cu
);
22330 const char *attr_name
= attr
->as_string ();
22331 if (attr
== NULL
|| attr_name
== NULL
)
22334 /* dwarf2_name had to be already called. */
22335 gdb_assert (attr
->canonical_string_p ());
22337 /* Strip the base name, keep any leading namespaces/classes. */
22338 base
= strrchr (attr_name
, ':');
22339 if (base
== NULL
|| base
== attr_name
|| base
[-1] != ':')
22342 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
22343 return obstack_strndup (&objfile
->per_bfd
->storage_obstack
,
22345 &base
[-1] - attr_name
);
22348 /* Return the name of the namespace/class that DIE is defined within,
22349 or "" if we can't tell. The caller should not xfree the result.
22351 For example, if we're within the method foo() in the following
22361 then determine_prefix on foo's die will return "N::C". */
22363 static const char *
22364 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22366 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
22367 struct die_info
*parent
, *spec_die
;
22368 struct dwarf2_cu
*spec_cu
;
22369 struct type
*parent_type
;
22370 const char *retval
;
22372 if (cu
->language
!= language_cplus
22373 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
22374 && cu
->language
!= language_rust
)
22377 retval
= anonymous_struct_prefix (die
, cu
);
22381 /* We have to be careful in the presence of DW_AT_specification.
22382 For example, with GCC 3.4, given the code
22386 // Definition of N::foo.
22390 then we'll have a tree of DIEs like this:
22392 1: DW_TAG_compile_unit
22393 2: DW_TAG_namespace // N
22394 3: DW_TAG_subprogram // declaration of N::foo
22395 4: DW_TAG_subprogram // definition of N::foo
22396 DW_AT_specification // refers to die #3
22398 Thus, when processing die #4, we have to pretend that we're in
22399 the context of its DW_AT_specification, namely the contex of die
22402 spec_die
= die_specification (die
, &spec_cu
);
22403 if (spec_die
== NULL
)
22404 parent
= die
->parent
;
22407 parent
= spec_die
->parent
;
22411 if (parent
== NULL
)
22413 else if (parent
->building_fullname
)
22416 const char *parent_name
;
22418 /* It has been seen on RealView 2.2 built binaries,
22419 DW_TAG_template_type_param types actually _defined_ as
22420 children of the parent class:
22423 template class <class Enum> Class{};
22424 Class<enum E> class_e;
22426 1: DW_TAG_class_type (Class)
22427 2: DW_TAG_enumeration_type (E)
22428 3: DW_TAG_enumerator (enum1:0)
22429 3: DW_TAG_enumerator (enum2:1)
22431 2: DW_TAG_template_type_param
22432 DW_AT_type DW_FORM_ref_udata (E)
22434 Besides being broken debug info, it can put GDB into an
22435 infinite loop. Consider:
22437 When we're building the full name for Class<E>, we'll start
22438 at Class, and go look over its template type parameters,
22439 finding E. We'll then try to build the full name of E, and
22440 reach here. We're now trying to build the full name of E,
22441 and look over the parent DIE for containing scope. In the
22442 broken case, if we followed the parent DIE of E, we'd again
22443 find Class, and once again go look at its template type
22444 arguments, etc., etc. Simply don't consider such parent die
22445 as source-level parent of this die (it can't be, the language
22446 doesn't allow it), and break the loop here. */
22447 name
= dwarf2_name (die
, cu
);
22448 parent_name
= dwarf2_name (parent
, cu
);
22449 complaint (_("template param type '%s' defined within parent '%s'"),
22450 name
? name
: "<unknown>",
22451 parent_name
? parent_name
: "<unknown>");
22455 switch (parent
->tag
)
22457 case DW_TAG_namespace
:
22458 parent_type
= read_type_die (parent
, cu
);
22459 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
22460 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
22461 Work around this problem here. */
22462 if (cu
->language
== language_cplus
22463 && strcmp (parent_type
->name (), "::") == 0)
22465 /* We give a name to even anonymous namespaces. */
22466 return parent_type
->name ();
22467 case DW_TAG_class_type
:
22468 case DW_TAG_interface_type
:
22469 case DW_TAG_structure_type
:
22470 case DW_TAG_union_type
:
22471 case DW_TAG_module
:
22472 parent_type
= read_type_die (parent
, cu
);
22473 if (parent_type
->name () != NULL
)
22474 return parent_type
->name ();
22476 /* An anonymous structure is only allowed non-static data
22477 members; no typedefs, no member functions, et cetera.
22478 So it does not need a prefix. */
22480 case DW_TAG_compile_unit
:
22481 case DW_TAG_partial_unit
:
22482 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
22483 if (cu
->language
== language_cplus
22484 && !per_objfile
->per_bfd
->types
.empty ()
22485 && die
->child
!= NULL
22486 && (die
->tag
== DW_TAG_class_type
22487 || die
->tag
== DW_TAG_structure_type
22488 || die
->tag
== DW_TAG_union_type
))
22490 const char *name
= guess_full_die_structure_name (die
, cu
);
22495 case DW_TAG_subprogram
:
22496 /* Nested subroutines in Fortran get a prefix with the name
22497 of the parent's subroutine. */
22498 if (cu
->language
== language_fortran
)
22500 if ((die
->tag
== DW_TAG_subprogram
)
22501 && (dwarf2_name (parent
, cu
) != NULL
))
22502 return dwarf2_name (parent
, cu
);
22504 return determine_prefix (parent
, cu
);
22505 case DW_TAG_enumeration_type
:
22506 parent_type
= read_type_die (parent
, cu
);
22507 if (TYPE_DECLARED_CLASS (parent_type
))
22509 if (parent_type
->name () != NULL
)
22510 return parent_type
->name ();
22513 /* Fall through. */
22515 return determine_prefix (parent
, cu
);
22519 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
22520 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
22521 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
22522 an obconcat, otherwise allocate storage for the result. The CU argument is
22523 used to determine the language and hence, the appropriate separator. */
22525 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
22528 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
22529 int physname
, struct dwarf2_cu
*cu
)
22531 const char *lead
= "";
22534 if (suffix
== NULL
|| suffix
[0] == '\0'
22535 || prefix
== NULL
|| prefix
[0] == '\0')
22537 else if (cu
->language
== language_d
)
22539 /* For D, the 'main' function could be defined in any module, but it
22540 should never be prefixed. */
22541 if (strcmp (suffix
, "D main") == 0)
22549 else if (cu
->language
== language_fortran
&& physname
)
22551 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
22552 DW_AT_MIPS_linkage_name is preferred and used instead. */
22560 if (prefix
== NULL
)
22562 if (suffix
== NULL
)
22569 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
22571 strcpy (retval
, lead
);
22572 strcat (retval
, prefix
);
22573 strcat (retval
, sep
);
22574 strcat (retval
, suffix
);
22579 /* We have an obstack. */
22580 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
22584 /* Get name of a die, return NULL if not found. */
22586 static const char *
22587 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
22588 struct objfile
*objfile
)
22590 if (name
&& cu
->language
== language_cplus
)
22592 gdb::unique_xmalloc_ptr
<char> canon_name
22593 = cp_canonicalize_string (name
);
22595 if (canon_name
!= nullptr)
22596 name
= objfile
->intern (canon_name
.get ());
22602 /* Get name of a die, return NULL if not found.
22603 Anonymous namespaces are converted to their magic string. */
22605 static const char *
22606 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22608 struct attribute
*attr
;
22609 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
22611 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
22612 const char *attr_name
= attr
== nullptr ? nullptr : attr
->as_string ();
22613 if (attr_name
== nullptr
22614 && die
->tag
!= DW_TAG_namespace
22615 && die
->tag
!= DW_TAG_class_type
22616 && die
->tag
!= DW_TAG_interface_type
22617 && die
->tag
!= DW_TAG_structure_type
22618 && die
->tag
!= DW_TAG_union_type
)
22623 case DW_TAG_compile_unit
:
22624 case DW_TAG_partial_unit
:
22625 /* Compilation units have a DW_AT_name that is a filename, not
22626 a source language identifier. */
22627 case DW_TAG_enumeration_type
:
22628 case DW_TAG_enumerator
:
22629 /* These tags always have simple identifiers already; no need
22630 to canonicalize them. */
22633 case DW_TAG_namespace
:
22634 if (attr_name
!= nullptr)
22636 return CP_ANONYMOUS_NAMESPACE_STR
;
22638 case DW_TAG_class_type
:
22639 case DW_TAG_interface_type
:
22640 case DW_TAG_structure_type
:
22641 case DW_TAG_union_type
:
22642 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
22643 structures or unions. These were of the form "._%d" in GCC 4.1,
22644 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
22645 and GCC 4.4. We work around this problem by ignoring these. */
22646 if (attr_name
!= nullptr
22647 && (startswith (attr_name
, "._")
22648 || startswith (attr_name
, "<anonymous")))
22651 /* GCC might emit a nameless typedef that has a linkage name. See
22652 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22653 if (!attr
|| attr_name
== NULL
)
22655 attr
= dw2_linkage_name_attr (die
, cu
);
22656 if (attr
== NULL
|| attr_name
== NULL
)
22659 /* Avoid demangling attr_name the second time on a second
22660 call for the same DIE. */
22661 if (!attr
->canonical_string_p ())
22663 gdb::unique_xmalloc_ptr
<char> demangled
22664 (gdb_demangle (attr_name
, DMGL_TYPES
));
22665 if (demangled
== nullptr)
22668 attr
->set_string_canonical (objfile
->intern (demangled
.get ()));
22671 /* Strip any leading namespaces/classes, keep only the
22672 base name. DW_AT_name for named DIEs does not
22673 contain the prefixes. */
22674 const char *base
= strrchr (attr_name
, ':');
22675 if (base
&& base
> attr_name
&& base
[-1] == ':')
22686 if (!attr
->canonical_string_p ())
22687 attr
->set_string_canonical (dwarf2_canonicalize_name (attr_name
, cu
,
22689 return attr
->as_string ();
22692 /* Return the die that this die in an extension of, or NULL if there
22693 is none. *EXT_CU is the CU containing DIE on input, and the CU
22694 containing the return value on output. */
22696 static struct die_info
*
22697 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
22699 struct attribute
*attr
;
22701 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
22705 return follow_die_ref (die
, attr
, ext_cu
);
22709 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
22713 print_spaces (indent
, f
);
22714 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
22715 dwarf_tag_name (die
->tag
), die
->abbrev
,
22716 sect_offset_str (die
->sect_off
));
22718 if (die
->parent
!= NULL
)
22720 print_spaces (indent
, f
);
22721 fprintf_unfiltered (f
, " parent at offset: %s\n",
22722 sect_offset_str (die
->parent
->sect_off
));
22725 print_spaces (indent
, f
);
22726 fprintf_unfiltered (f
, " has children: %s\n",
22727 dwarf_bool_name (die
->child
!= NULL
));
22729 print_spaces (indent
, f
);
22730 fprintf_unfiltered (f
, " attributes:\n");
22732 for (i
= 0; i
< die
->num_attrs
; ++i
)
22734 print_spaces (indent
, f
);
22735 fprintf_unfiltered (f
, " %s (%s) ",
22736 dwarf_attr_name (die
->attrs
[i
].name
),
22737 dwarf_form_name (die
->attrs
[i
].form
));
22739 switch (die
->attrs
[i
].form
)
22742 case DW_FORM_addrx
:
22743 case DW_FORM_GNU_addr_index
:
22744 fprintf_unfiltered (f
, "address: ");
22745 fputs_filtered (hex_string (die
->attrs
[i
].as_address ()), f
);
22747 case DW_FORM_block2
:
22748 case DW_FORM_block4
:
22749 case DW_FORM_block
:
22750 case DW_FORM_block1
:
22751 fprintf_unfiltered (f
, "block: size %s",
22752 pulongest (die
->attrs
[i
].as_block ()->size
));
22754 case DW_FORM_exprloc
:
22755 fprintf_unfiltered (f
, "expression: size %s",
22756 pulongest (die
->attrs
[i
].as_block ()->size
));
22758 case DW_FORM_data16
:
22759 fprintf_unfiltered (f
, "constant of 16 bytes");
22761 case DW_FORM_ref_addr
:
22762 fprintf_unfiltered (f
, "ref address: ");
22763 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22765 case DW_FORM_GNU_ref_alt
:
22766 fprintf_unfiltered (f
, "alt ref address: ");
22767 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22773 case DW_FORM_ref_udata
:
22774 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
22775 (long) (DW_UNSND (&die
->attrs
[i
])));
22777 case DW_FORM_data1
:
22778 case DW_FORM_data2
:
22779 case DW_FORM_data4
:
22780 case DW_FORM_data8
:
22781 case DW_FORM_udata
:
22782 fprintf_unfiltered (f
, "constant: %s",
22783 pulongest (DW_UNSND (&die
->attrs
[i
])));
22785 case DW_FORM_sec_offset
:
22786 fprintf_unfiltered (f
, "section offset: %s",
22787 pulongest (DW_UNSND (&die
->attrs
[i
])));
22789 case DW_FORM_ref_sig8
:
22790 fprintf_unfiltered (f
, "signature: %s",
22791 hex_string (die
->attrs
[i
].as_signature ()));
22793 case DW_FORM_string
:
22795 case DW_FORM_line_strp
:
22797 case DW_FORM_GNU_str_index
:
22798 case DW_FORM_GNU_strp_alt
:
22799 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22800 die
->attrs
[i
].as_string ()
22801 ? die
->attrs
[i
].as_string () : "",
22802 die
->attrs
[i
].canonical_string_p () ? "is" : "not");
22805 if (DW_UNSND (&die
->attrs
[i
]))
22806 fprintf_unfiltered (f
, "flag: TRUE");
22808 fprintf_unfiltered (f
, "flag: FALSE");
22810 case DW_FORM_flag_present
:
22811 fprintf_unfiltered (f
, "flag: TRUE");
22813 case DW_FORM_indirect
:
22814 /* The reader will have reduced the indirect form to
22815 the "base form" so this form should not occur. */
22816 fprintf_unfiltered (f
,
22817 "unexpected attribute form: DW_FORM_indirect");
22819 case DW_FORM_sdata
:
22820 case DW_FORM_implicit_const
:
22821 fprintf_unfiltered (f
, "constant: %s",
22822 plongest (die
->attrs
[i
].as_signed ()));
22825 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
22826 die
->attrs
[i
].form
);
22829 fprintf_unfiltered (f
, "\n");
22834 dump_die_for_error (struct die_info
*die
)
22836 dump_die_shallow (gdb_stderr
, 0, die
);
22840 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
22842 int indent
= level
* 4;
22844 gdb_assert (die
!= NULL
);
22846 if (level
>= max_level
)
22849 dump_die_shallow (f
, indent
, die
);
22851 if (die
->child
!= NULL
)
22853 print_spaces (indent
, f
);
22854 fprintf_unfiltered (f
, " Children:");
22855 if (level
+ 1 < max_level
)
22857 fprintf_unfiltered (f
, "\n");
22858 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22862 fprintf_unfiltered (f
,
22863 " [not printed, max nesting level reached]\n");
22867 if (die
->sibling
!= NULL
&& level
> 0)
22869 dump_die_1 (f
, level
, max_level
, die
->sibling
);
22873 /* This is called from the pdie macro in gdbinit.in.
22874 It's not static so gcc will keep a copy callable from gdb. */
22877 dump_die (struct die_info
*die
, int max_level
)
22879 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
22883 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
22887 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
22888 to_underlying (die
->sect_off
),
22894 /* Follow reference or signature attribute ATTR of SRC_DIE.
22895 On entry *REF_CU is the CU of SRC_DIE.
22896 On exit *REF_CU is the CU of the result. */
22898 static struct die_info
*
22899 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22900 struct dwarf2_cu
**ref_cu
)
22902 struct die_info
*die
;
22904 if (attr
->form_is_ref ())
22905 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22906 else if (attr
->form
== DW_FORM_ref_sig8
)
22907 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22910 dump_die_for_error (src_die
);
22911 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22912 objfile_name ((*ref_cu
)->per_objfile
->objfile
));
22918 /* Follow reference OFFSET.
22919 On entry *REF_CU is the CU of the source die referencing OFFSET.
22920 On exit *REF_CU is the CU of the result.
22921 Returns NULL if OFFSET is invalid. */
22923 static struct die_info
*
22924 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22925 struct dwarf2_cu
**ref_cu
)
22927 struct die_info temp_die
;
22928 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22929 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
22931 gdb_assert (cu
->per_cu
!= NULL
);
22935 if (cu
->per_cu
->is_debug_types
)
22937 /* .debug_types CUs cannot reference anything outside their CU.
22938 If they need to, they have to reference a signatured type via
22939 DW_FORM_ref_sig8. */
22940 if (!cu
->header
.offset_in_cu_p (sect_off
))
22943 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22944 || !cu
->header
.offset_in_cu_p (sect_off
))
22946 struct dwarf2_per_cu_data
*per_cu
;
22948 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22951 /* If necessary, add it to the queue and load its DIEs. */
22952 if (maybe_queue_comp_unit (cu
, per_cu
, per_objfile
, cu
->language
))
22953 load_full_comp_unit (per_cu
, per_objfile
, false, cu
->language
);
22955 target_cu
= per_objfile
->get_cu (per_cu
);
22957 else if (cu
->dies
== NULL
)
22959 /* We're loading full DIEs during partial symbol reading. */
22960 gdb_assert (per_objfile
->per_bfd
->reading_partial_symbols
);
22961 load_full_comp_unit (cu
->per_cu
, per_objfile
, false, language_minimal
);
22964 *ref_cu
= target_cu
;
22965 temp_die
.sect_off
= sect_off
;
22967 if (target_cu
!= cu
)
22968 target_cu
->ancestor
= cu
;
22970 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22972 to_underlying (sect_off
));
22975 /* Follow reference attribute ATTR of SRC_DIE.
22976 On entry *REF_CU is the CU of SRC_DIE.
22977 On exit *REF_CU is the CU of the result. */
22979 static struct die_info
*
22980 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22981 struct dwarf2_cu
**ref_cu
)
22983 sect_offset sect_off
= attr
->get_ref_die_offset ();
22984 struct dwarf2_cu
*cu
= *ref_cu
;
22985 struct die_info
*die
;
22987 die
= follow_die_offset (sect_off
,
22988 (attr
->form
== DW_FORM_GNU_ref_alt
22989 || cu
->per_cu
->is_dwz
),
22992 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
22993 "at %s [in module %s]"),
22994 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
22995 objfile_name (cu
->per_objfile
->objfile
));
23002 struct dwarf2_locexpr_baton
23003 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
23004 dwarf2_per_cu_data
*per_cu
,
23005 dwarf2_per_objfile
*per_objfile
,
23006 gdb::function_view
<CORE_ADDR ()> get_frame_pc
,
23007 bool resolve_abstract_p
)
23009 struct die_info
*die
;
23010 struct attribute
*attr
;
23011 struct dwarf2_locexpr_baton retval
;
23012 struct objfile
*objfile
= per_objfile
->objfile
;
23014 dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
23016 cu
= load_cu (per_cu
, per_objfile
, false);
23020 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23021 Instead just throw an error, not much else we can do. */
23022 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23023 sect_offset_str (sect_off
), objfile_name (objfile
));
23026 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23028 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23029 sect_offset_str (sect_off
), objfile_name (objfile
));
23031 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
23032 if (!attr
&& resolve_abstract_p
23033 && (per_objfile
->per_bfd
->abstract_to_concrete
.find (die
->sect_off
)
23034 != per_objfile
->per_bfd
->abstract_to_concrete
.end ()))
23036 CORE_ADDR pc
= get_frame_pc ();
23037 CORE_ADDR baseaddr
= objfile
->text_section_offset ();
23038 struct gdbarch
*gdbarch
= objfile
->arch ();
23040 for (const auto &cand_off
23041 : per_objfile
->per_bfd
->abstract_to_concrete
[die
->sect_off
])
23043 struct dwarf2_cu
*cand_cu
= cu
;
23044 struct die_info
*cand
23045 = follow_die_offset (cand_off
, per_cu
->is_dwz
, &cand_cu
);
23048 || cand
->parent
->tag
!= DW_TAG_subprogram
)
23051 CORE_ADDR pc_low
, pc_high
;
23052 get_scope_pc_bounds (cand
->parent
, &pc_low
, &pc_high
, cu
);
23053 if (pc_low
== ((CORE_ADDR
) -1))
23055 pc_low
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_low
+ baseaddr
);
23056 pc_high
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc_high
+ baseaddr
);
23057 if (!(pc_low
<= pc
&& pc
< pc_high
))
23061 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
23068 /* DWARF: "If there is no such attribute, then there is no effect.".
23069 DATA is ignored if SIZE is 0. */
23071 retval
.data
= NULL
;
23074 else if (attr
->form_is_section_offset ())
23076 struct dwarf2_loclist_baton loclist_baton
;
23077 CORE_ADDR pc
= get_frame_pc ();
23080 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
23082 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
23084 retval
.size
= size
;
23088 if (!attr
->form_is_block ())
23089 error (_("Dwarf Error: DIE at %s referenced in module %s "
23090 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
23091 sect_offset_str (sect_off
), objfile_name (objfile
));
23093 struct dwarf_block
*block
= attr
->as_block ();
23094 retval
.data
= block
->data
;
23095 retval
.size
= block
->size
;
23097 retval
.per_objfile
= per_objfile
;
23098 retval
.per_cu
= cu
->per_cu
;
23100 per_objfile
->age_comp_units ();
23107 struct dwarf2_locexpr_baton
23108 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
23109 dwarf2_per_cu_data
*per_cu
,
23110 dwarf2_per_objfile
*per_objfile
,
23111 gdb::function_view
<CORE_ADDR ()> get_frame_pc
)
23113 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
23115 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, per_objfile
,
23119 /* Write a constant of a given type as target-ordered bytes into
23122 static const gdb_byte
*
23123 write_constant_as_bytes (struct obstack
*obstack
,
23124 enum bfd_endian byte_order
,
23131 *len
= TYPE_LENGTH (type
);
23132 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23133 store_unsigned_integer (result
, *len
, byte_order
, value
);
23141 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
23142 dwarf2_per_cu_data
*per_cu
,
23143 dwarf2_per_objfile
*per_objfile
,
23147 struct die_info
*die
;
23148 struct attribute
*attr
;
23149 const gdb_byte
*result
= NULL
;
23152 enum bfd_endian byte_order
;
23153 struct objfile
*objfile
= per_objfile
->objfile
;
23155 dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
23157 cu
= load_cu (per_cu
, per_objfile
, false);
23161 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23162 Instead just throw an error, not much else we can do. */
23163 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23164 sect_offset_str (sect_off
), objfile_name (objfile
));
23167 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23169 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23170 sect_offset_str (sect_off
), objfile_name (objfile
));
23172 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
23176 byte_order
= (bfd_big_endian (objfile
->obfd
)
23177 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
23179 switch (attr
->form
)
23182 case DW_FORM_addrx
:
23183 case DW_FORM_GNU_addr_index
:
23187 *len
= cu
->header
.addr_size
;
23188 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23189 store_unsigned_integer (tem
, *len
, byte_order
, attr
->as_address ());
23193 case DW_FORM_string
:
23196 case DW_FORM_GNU_str_index
:
23197 case DW_FORM_GNU_strp_alt
:
23198 /* The string is already allocated on the objfile obstack, point
23201 const char *attr_name
= attr
->as_string ();
23202 result
= (const gdb_byte
*) attr_name
;
23203 *len
= strlen (attr_name
);
23206 case DW_FORM_block1
:
23207 case DW_FORM_block2
:
23208 case DW_FORM_block4
:
23209 case DW_FORM_block
:
23210 case DW_FORM_exprloc
:
23211 case DW_FORM_data16
:
23213 struct dwarf_block
*block
= attr
->as_block ();
23214 result
= block
->data
;
23215 *len
= block
->size
;
23219 /* The DW_AT_const_value attributes are supposed to carry the
23220 symbol's value "represented as it would be on the target
23221 architecture." By the time we get here, it's already been
23222 converted to host endianness, so we just need to sign- or
23223 zero-extend it as appropriate. */
23224 case DW_FORM_data1
:
23225 type
= die_type (die
, cu
);
23226 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
23227 if (result
== NULL
)
23228 result
= write_constant_as_bytes (obstack
, byte_order
,
23231 case DW_FORM_data2
:
23232 type
= die_type (die
, cu
);
23233 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
23234 if (result
== NULL
)
23235 result
= write_constant_as_bytes (obstack
, byte_order
,
23238 case DW_FORM_data4
:
23239 type
= die_type (die
, cu
);
23240 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
23241 if (result
== NULL
)
23242 result
= write_constant_as_bytes (obstack
, byte_order
,
23245 case DW_FORM_data8
:
23246 type
= die_type (die
, cu
);
23247 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
23248 if (result
== NULL
)
23249 result
= write_constant_as_bytes (obstack
, byte_order
,
23253 case DW_FORM_sdata
:
23254 case DW_FORM_implicit_const
:
23255 type
= die_type (die
, cu
);
23256 result
= write_constant_as_bytes (obstack
, byte_order
,
23257 type
, attr
->as_signed (), len
);
23260 case DW_FORM_udata
:
23261 type
= die_type (die
, cu
);
23262 result
= write_constant_as_bytes (obstack
, byte_order
,
23263 type
, DW_UNSND (attr
), len
);
23267 complaint (_("unsupported const value attribute form: '%s'"),
23268 dwarf_form_name (attr
->form
));
23278 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
23279 dwarf2_per_cu_data
*per_cu
,
23280 dwarf2_per_objfile
*per_objfile
)
23282 struct die_info
*die
;
23284 dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
23286 cu
= load_cu (per_cu
, per_objfile
, false);
23291 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23295 return die_type (die
, cu
);
23301 dwarf2_get_die_type (cu_offset die_offset
,
23302 dwarf2_per_cu_data
*per_cu
,
23303 dwarf2_per_objfile
*per_objfile
)
23305 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
23306 return get_die_type_at_offset (die_offset_sect
, per_cu
, per_objfile
);
23309 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
23310 On entry *REF_CU is the CU of SRC_DIE.
23311 On exit *REF_CU is the CU of the result.
23312 Returns NULL if the referenced DIE isn't found. */
23314 static struct die_info
*
23315 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
23316 struct dwarf2_cu
**ref_cu
)
23318 struct die_info temp_die
;
23319 struct dwarf2_cu
*sig_cu
, *cu
= *ref_cu
;
23320 struct die_info
*die
;
23321 dwarf2_per_objfile
*per_objfile
= (*ref_cu
)->per_objfile
;
23324 /* While it might be nice to assert sig_type->type == NULL here,
23325 we can get here for DW_AT_imported_declaration where we need
23326 the DIE not the type. */
23328 /* If necessary, add it to the queue and load its DIEs. */
23330 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, per_objfile
,
23332 read_signatured_type (sig_type
, per_objfile
);
23334 sig_cu
= per_objfile
->get_cu (&sig_type
->per_cu
);
23335 gdb_assert (sig_cu
!= NULL
);
23336 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
23337 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
23338 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
23339 to_underlying (temp_die
.sect_off
));
23342 /* For .gdb_index version 7 keep track of included TUs.
23343 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
23344 if (per_objfile
->per_bfd
->index_table
!= NULL
23345 && per_objfile
->per_bfd
->index_table
->version
<= 7)
23347 (*ref_cu
)->per_cu
->imported_symtabs_push (sig_cu
->per_cu
);
23352 sig_cu
->ancestor
= cu
;
23360 /* Follow signatured type referenced by ATTR in SRC_DIE.
23361 On entry *REF_CU is the CU of SRC_DIE.
23362 On exit *REF_CU is the CU of the result.
23363 The result is the DIE of the type.
23364 If the referenced type cannot be found an error is thrown. */
23366 static struct die_info
*
23367 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23368 struct dwarf2_cu
**ref_cu
)
23370 ULONGEST signature
= attr
->as_signature ();
23371 struct signatured_type
*sig_type
;
23372 struct die_info
*die
;
23374 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
23376 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
23377 /* sig_type will be NULL if the signatured type is missing from
23379 if (sig_type
== NULL
)
23381 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23382 " from DIE at %s [in module %s]"),
23383 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23384 objfile_name ((*ref_cu
)->per_objfile
->objfile
));
23387 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
23390 dump_die_for_error (src_die
);
23391 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23392 " from DIE at %s [in module %s]"),
23393 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23394 objfile_name ((*ref_cu
)->per_objfile
->objfile
));
23400 /* Get the type specified by SIGNATURE referenced in DIE/CU,
23401 reading in and processing the type unit if necessary. */
23403 static struct type
*
23404 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
23405 struct dwarf2_cu
*cu
)
23407 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
23408 struct signatured_type
*sig_type
;
23409 struct dwarf2_cu
*type_cu
;
23410 struct die_info
*type_die
;
23413 sig_type
= lookup_signatured_type (cu
, signature
);
23414 /* sig_type will be NULL if the signatured type is missing from
23416 if (sig_type
== NULL
)
23418 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23419 " from DIE at %s [in module %s]"),
23420 hex_string (signature
), sect_offset_str (die
->sect_off
),
23421 objfile_name (per_objfile
->objfile
));
23422 return build_error_marker_type (cu
, die
);
23425 /* If we already know the type we're done. */
23426 type
= per_objfile
->get_type_for_signatured_type (sig_type
);
23427 if (type
!= nullptr)
23431 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
23432 if (type_die
!= NULL
)
23434 /* N.B. We need to call get_die_type to ensure only one type for this DIE
23435 is created. This is important, for example, because for c++ classes
23436 we need TYPE_NAME set which is only done by new_symbol. Blech. */
23437 type
= read_type_die (type_die
, type_cu
);
23440 complaint (_("Dwarf Error: Cannot build signatured type %s"
23441 " referenced from DIE at %s [in module %s]"),
23442 hex_string (signature
), sect_offset_str (die
->sect_off
),
23443 objfile_name (per_objfile
->objfile
));
23444 type
= build_error_marker_type (cu
, die
);
23449 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23450 " from DIE at %s [in module %s]"),
23451 hex_string (signature
), sect_offset_str (die
->sect_off
),
23452 objfile_name (per_objfile
->objfile
));
23453 type
= build_error_marker_type (cu
, die
);
23456 per_objfile
->set_type_for_signatured_type (sig_type
, type
);
23461 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
23462 reading in and processing the type unit if necessary. */
23464 static struct type
*
23465 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
23466 struct dwarf2_cu
*cu
) /* ARI: editCase function */
23468 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
23469 if (attr
->form_is_ref ())
23471 struct dwarf2_cu
*type_cu
= cu
;
23472 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
23474 return read_type_die (type_die
, type_cu
);
23476 else if (attr
->form
== DW_FORM_ref_sig8
)
23478 return get_signatured_type (die
, attr
->as_signature (), cu
);
23482 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
23484 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
23485 " at %s [in module %s]"),
23486 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
23487 objfile_name (per_objfile
->objfile
));
23488 return build_error_marker_type (cu
, die
);
23492 /* Load the DIEs associated with type unit PER_CU into memory. */
23495 load_full_type_unit (dwarf2_per_cu_data
*per_cu
,
23496 dwarf2_per_objfile
*per_objfile
)
23498 struct signatured_type
*sig_type
;
23500 /* Caller is responsible for ensuring type_unit_groups don't get here. */
23501 gdb_assert (! per_cu
->type_unit_group_p ());
23503 /* We have the per_cu, but we need the signatured_type.
23504 Fortunately this is an easy translation. */
23505 gdb_assert (per_cu
->is_debug_types
);
23506 sig_type
= (struct signatured_type
*) per_cu
;
23508 gdb_assert (per_objfile
->get_cu (per_cu
) == nullptr);
23510 read_signatured_type (sig_type
, per_objfile
);
23512 gdb_assert (per_objfile
->get_cu (per_cu
) != nullptr);
23515 /* Read in a signatured type and build its CU and DIEs.
23516 If the type is a stub for the real type in a DWO file,
23517 read in the real type from the DWO file as well. */
23520 read_signatured_type (signatured_type
*sig_type
,
23521 dwarf2_per_objfile
*per_objfile
)
23523 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
23525 gdb_assert (per_cu
->is_debug_types
);
23526 gdb_assert (per_objfile
->get_cu (per_cu
) == nullptr);
23528 cutu_reader
reader (per_cu
, per_objfile
, nullptr, nullptr, false);
23530 if (!reader
.dummy_p
)
23532 struct dwarf2_cu
*cu
= reader
.cu
;
23533 const gdb_byte
*info_ptr
= reader
.info_ptr
;
23535 gdb_assert (cu
->die_hash
== NULL
);
23537 htab_create_alloc_ex (cu
->header
.length
/ 12,
23541 &cu
->comp_unit_obstack
,
23542 hashtab_obstack_allocate
,
23543 dummy_obstack_deallocate
);
23545 if (reader
.comp_unit_die
->has_children
)
23546 reader
.comp_unit_die
->child
23547 = read_die_and_siblings (&reader
, info_ptr
, &info_ptr
,
23548 reader
.comp_unit_die
);
23549 cu
->dies
= reader
.comp_unit_die
;
23550 /* comp_unit_die is not stored in die_hash, no need. */
23552 /* We try not to read any attributes in this function, because
23553 not all CUs needed for references have been loaded yet, and
23554 symbol table processing isn't initialized. But we have to
23555 set the CU language, or we won't be able to build types
23556 correctly. Similarly, if we do not read the producer, we can
23557 not apply producer-specific interpretation. */
23558 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
23563 sig_type
->per_cu
.tu_read
= 1;
23566 /* Decode simple location descriptions.
23567 Given a pointer to a dwarf block that defines a location, compute
23568 the location and return the value. If COMPUTED is non-null, it is
23569 set to true to indicate that decoding was successful, and false
23570 otherwise. If COMPUTED is null, then this function may emit a
23574 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
, bool *computed
)
23576 struct objfile
*objfile
= cu
->per_objfile
->objfile
;
23578 size_t size
= blk
->size
;
23579 const gdb_byte
*data
= blk
->data
;
23580 CORE_ADDR stack
[64];
23582 unsigned int bytes_read
, unsnd
;
23585 if (computed
!= nullptr)
23591 stack
[++stacki
] = 0;
23630 stack
[++stacki
] = op
- DW_OP_lit0
;
23665 stack
[++stacki
] = op
- DW_OP_reg0
;
23668 if (computed
== nullptr)
23669 dwarf2_complex_location_expr_complaint ();
23676 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
23678 stack
[++stacki
] = unsnd
;
23681 if (computed
== nullptr)
23682 dwarf2_complex_location_expr_complaint ();
23689 stack
[++stacki
] = cu
->header
.read_address (objfile
->obfd
, &data
[i
],
23694 case DW_OP_const1u
:
23695 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
23699 case DW_OP_const1s
:
23700 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
23704 case DW_OP_const2u
:
23705 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
23709 case DW_OP_const2s
:
23710 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
23714 case DW_OP_const4u
:
23715 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
23719 case DW_OP_const4s
:
23720 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
23724 case DW_OP_const8u
:
23725 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
23730 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
23736 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
23741 stack
[stacki
+ 1] = stack
[stacki
];
23746 stack
[stacki
- 1] += stack
[stacki
];
23750 case DW_OP_plus_uconst
:
23751 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
23757 stack
[stacki
- 1] -= stack
[stacki
];
23762 /* If we're not the last op, then we definitely can't encode
23763 this using GDB's address_class enum. This is valid for partial
23764 global symbols, although the variable's address will be bogus
23768 if (computed
== nullptr)
23769 dwarf2_complex_location_expr_complaint ();
23775 case DW_OP_GNU_push_tls_address
:
23776 case DW_OP_form_tls_address
:
23777 /* The top of the stack has the offset from the beginning
23778 of the thread control block at which the variable is located. */
23779 /* Nothing should follow this operator, so the top of stack would
23781 /* This is valid for partial global symbols, but the variable's
23782 address will be bogus in the psymtab. Make it always at least
23783 non-zero to not look as a variable garbage collected by linker
23784 which have DW_OP_addr 0. */
23787 if (computed
== nullptr)
23788 dwarf2_complex_location_expr_complaint ();
23795 case DW_OP_GNU_uninit
:
23796 if (computed
!= nullptr)
23801 case DW_OP_GNU_addr_index
:
23802 case DW_OP_GNU_const_index
:
23803 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
23809 if (computed
== nullptr)
23811 const char *name
= get_DW_OP_name (op
);
23814 complaint (_("unsupported stack op: '%s'"),
23817 complaint (_("unsupported stack op: '%02x'"),
23821 return (stack
[stacki
]);
23824 /* Enforce maximum stack depth of SIZE-1 to avoid writing
23825 outside of the allocated space. Also enforce minimum>0. */
23826 if (stacki
>= ARRAY_SIZE (stack
) - 1)
23828 if (computed
== nullptr)
23829 complaint (_("location description stack overflow"));
23835 if (computed
== nullptr)
23836 complaint (_("location description stack underflow"));
23841 if (computed
!= nullptr)
23843 return (stack
[stacki
]);
23846 /* memory allocation interface */
23848 static struct dwarf_block
*
23849 dwarf_alloc_block (struct dwarf2_cu
*cu
)
23851 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
23854 static struct die_info
*
23855 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
23857 struct die_info
*die
;
23858 size_t size
= sizeof (struct die_info
);
23861 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
23863 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
23864 memset (die
, 0, sizeof (struct die_info
));
23870 /* Macro support. */
23872 /* An overload of dwarf_decode_macros that finds the correct section
23873 and ensures it is read in before calling the other overload. */
23876 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
23877 int section_is_gnu
)
23879 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
23880 struct objfile
*objfile
= per_objfile
->objfile
;
23881 const struct line_header
*lh
= cu
->line_header
;
23882 unsigned int offset_size
= cu
->header
.offset_size
;
23883 struct dwarf2_section_info
*section
;
23884 const char *section_name
;
23886 if (cu
->dwo_unit
!= nullptr)
23888 if (section_is_gnu
)
23890 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
23891 section_name
= ".debug_macro.dwo";
23895 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
23896 section_name
= ".debug_macinfo.dwo";
23901 if (section_is_gnu
)
23903 section
= &per_objfile
->per_bfd
->macro
;
23904 section_name
= ".debug_macro";
23908 section
= &per_objfile
->per_bfd
->macinfo
;
23909 section_name
= ".debug_macinfo";
23913 section
->read (objfile
);
23914 if (section
->buffer
== nullptr)
23916 complaint (_("missing %s section"), section_name
);
23920 buildsym_compunit
*builder
= cu
->get_builder ();
23922 dwarf_decode_macros (per_objfile
, builder
, section
, lh
,
23923 offset_size
, offset
, section_is_gnu
);
23926 /* Return the .debug_loc section to use for CU.
23927 For DWO files use .debug_loc.dwo. */
23929 static struct dwarf2_section_info
*
23930 cu_debug_loc_section (struct dwarf2_cu
*cu
)
23932 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
23936 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
23938 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
23940 return (cu
->header
.version
>= 5 ? &per_objfile
->per_bfd
->loclists
23941 : &per_objfile
->per_bfd
->loc
);
23944 /* Return the .debug_rnglists section to use for CU. */
23945 static struct dwarf2_section_info
*
23946 cu_debug_rnglists_section (struct dwarf2_cu
*cu
, dwarf_tag tag
)
23948 if (cu
->header
.version
< 5)
23949 error (_(".debug_rnglists section cannot be used in DWARF %d"),
23950 cu
->header
.version
);
23951 struct dwarf2_per_objfile
*dwarf2_per_objfile
= cu
->per_objfile
;
23953 /* Make sure we read the .debug_rnglists section from the file that
23954 contains the DW_AT_ranges attribute we are reading. Normally that
23955 would be the .dwo file, if there is one. However for DW_TAG_compile_unit
23956 or DW_TAG_skeleton unit, we always want to read from objfile/linked
23958 if (cu
->dwo_unit
!= nullptr
23959 && tag
!= DW_TAG_compile_unit
23960 && tag
!= DW_TAG_skeleton_unit
)
23962 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
23964 if (sections
->rnglists
.size
> 0)
23965 return §ions
->rnglists
;
23967 error (_(".debug_rnglists section is missing from .dwo file."));
23969 return &dwarf2_per_objfile
->per_bfd
->rnglists
;
23972 /* A helper function that fills in a dwarf2_loclist_baton. */
23975 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
23976 struct dwarf2_loclist_baton
*baton
,
23977 const struct attribute
*attr
)
23979 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
23980 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
23982 section
->read (per_objfile
->objfile
);
23984 baton
->per_objfile
= per_objfile
;
23985 baton
->per_cu
= cu
->per_cu
;
23986 gdb_assert (baton
->per_cu
);
23987 /* We don't know how long the location list is, but make sure we
23988 don't run off the edge of the section. */
23989 baton
->size
= section
->size
- DW_UNSND (attr
);
23990 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
23991 if (cu
->base_address
.has_value ())
23992 baton
->base_address
= *cu
->base_address
;
23994 baton
->base_address
= 0;
23995 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
23999 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
24000 struct dwarf2_cu
*cu
, int is_block
)
24002 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
24003 struct objfile
*objfile
= per_objfile
->objfile
;
24004 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24006 if (attr
->form_is_section_offset ()
24007 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
24008 the section. If so, fall through to the complaint in the
24010 && DW_UNSND (attr
) < section
->get_size (objfile
))
24012 struct dwarf2_loclist_baton
*baton
;
24014 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
24016 fill_in_loclist_baton (cu
, baton
, attr
);
24018 if (!cu
->base_address
.has_value ())
24019 complaint (_("Location list used without "
24020 "specifying the CU base address."));
24022 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24023 ? dwarf2_loclist_block_index
24024 : dwarf2_loclist_index
);
24025 SYMBOL_LOCATION_BATON (sym
) = baton
;
24029 struct dwarf2_locexpr_baton
*baton
;
24031 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
24032 baton
->per_objfile
= per_objfile
;
24033 baton
->per_cu
= cu
->per_cu
;
24034 gdb_assert (baton
->per_cu
);
24036 if (attr
->form_is_block ())
24038 /* Note that we're just copying the block's data pointer
24039 here, not the actual data. We're still pointing into the
24040 info_buffer for SYM's objfile; right now we never release
24041 that buffer, but when we do clean up properly this may
24043 struct dwarf_block
*block
= attr
->as_block ();
24044 baton
->size
= block
->size
;
24045 baton
->data
= block
->data
;
24049 dwarf2_invalid_attrib_class_complaint ("location description",
24050 sym
->natural_name ());
24054 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24055 ? dwarf2_locexpr_block_index
24056 : dwarf2_locexpr_index
);
24057 SYMBOL_LOCATION_BATON (sym
) = baton
;
24063 const comp_unit_head
*
24064 dwarf2_per_cu_data::get_header () const
24066 if (!m_header_read_in
)
24068 const gdb_byte
*info_ptr
24069 = this->section
->buffer
+ to_underlying (this->sect_off
);
24071 memset (&m_header
, 0, sizeof (m_header
));
24073 read_comp_unit_head (&m_header
, info_ptr
, this->section
,
24074 rcuh_kind::COMPILE
);
24083 dwarf2_per_cu_data::addr_size () const
24085 return this->get_header ()->addr_size
;
24091 dwarf2_per_cu_data::offset_size () const
24093 return this->get_header ()->offset_size
;
24099 dwarf2_per_cu_data::ref_addr_size () const
24101 const comp_unit_head
*header
= this->get_header ();
24103 if (header
->version
== 2)
24104 return header
->addr_size
;
24106 return header
->offset_size
;
24112 dwarf2_cu::addr_type () const
24114 struct objfile
*objfile
= this->per_objfile
->objfile
;
24115 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
24116 struct type
*addr_type
= lookup_pointer_type (void_type
);
24117 int addr_size
= this->per_cu
->addr_size ();
24119 if (TYPE_LENGTH (addr_type
) == addr_size
)
24122 addr_type
= addr_sized_int_type (addr_type
->is_unsigned ());
24126 /* A helper function for dwarf2_find_containing_comp_unit that returns
24127 the index of the result, and that searches a vector. It will
24128 return a result even if the offset in question does not actually
24129 occur in any CU. This is separate so that it can be unit
24133 dwarf2_find_containing_comp_unit
24134 (sect_offset sect_off
,
24135 unsigned int offset_in_dwz
,
24136 const std::vector
<dwarf2_per_cu_data
*> &all_comp_units
)
24141 high
= all_comp_units
.size () - 1;
24144 struct dwarf2_per_cu_data
*mid_cu
;
24145 int mid
= low
+ (high
- low
) / 2;
24147 mid_cu
= all_comp_units
[mid
];
24148 if (mid_cu
->is_dwz
> offset_in_dwz
24149 || (mid_cu
->is_dwz
== offset_in_dwz
24150 && mid_cu
->sect_off
+ mid_cu
->length
> sect_off
))
24155 gdb_assert (low
== high
);
24159 /* Locate the .debug_info compilation unit from CU's objfile which contains
24160 the DIE at OFFSET. Raises an error on failure. */
24162 static struct dwarf2_per_cu_data
*
24163 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
24164 unsigned int offset_in_dwz
,
24165 dwarf2_per_objfile
*per_objfile
)
24167 int low
= dwarf2_find_containing_comp_unit
24168 (sect_off
, offset_in_dwz
, per_objfile
->per_bfd
->all_comp_units
);
24169 dwarf2_per_cu_data
*this_cu
= per_objfile
->per_bfd
->all_comp_units
[low
];
24171 if (this_cu
->is_dwz
!= offset_in_dwz
|| this_cu
->sect_off
> sect_off
)
24173 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
24174 error (_("Dwarf Error: could not find partial DIE containing "
24175 "offset %s [in module %s]"),
24176 sect_offset_str (sect_off
),
24177 bfd_get_filename (per_objfile
->objfile
->obfd
));
24179 gdb_assert (per_objfile
->per_bfd
->all_comp_units
[low
-1]->sect_off
24181 return per_objfile
->per_bfd
->all_comp_units
[low
-1];
24185 if (low
== per_objfile
->per_bfd
->all_comp_units
.size () - 1
24186 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
24187 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
24188 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
24195 namespace selftests
{
24196 namespace find_containing_comp_unit
{
24201 struct dwarf2_per_cu_data one
{};
24202 struct dwarf2_per_cu_data two
{};
24203 struct dwarf2_per_cu_data three
{};
24204 struct dwarf2_per_cu_data four
{};
24207 two
.sect_off
= sect_offset (one
.length
);
24212 four
.sect_off
= sect_offset (three
.length
);
24216 std::vector
<dwarf2_per_cu_data
*> units
;
24217 units
.push_back (&one
);
24218 units
.push_back (&two
);
24219 units
.push_back (&three
);
24220 units
.push_back (&four
);
24224 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 0, units
);
24225 SELF_CHECK (units
[result
] == &one
);
24226 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 0, units
);
24227 SELF_CHECK (units
[result
] == &one
);
24228 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 0, units
);
24229 SELF_CHECK (units
[result
] == &two
);
24231 result
= dwarf2_find_containing_comp_unit (sect_offset (0), 1, units
);
24232 SELF_CHECK (units
[result
] == &three
);
24233 result
= dwarf2_find_containing_comp_unit (sect_offset (3), 1, units
);
24234 SELF_CHECK (units
[result
] == &three
);
24235 result
= dwarf2_find_containing_comp_unit (sect_offset (5), 1, units
);
24236 SELF_CHECK (units
[result
] == &four
);
24242 #endif /* GDB_SELF_TEST */
24244 /* Initialize dwarf2_cu to read PER_CU, in the context of PER_OBJFILE. */
24246 dwarf2_cu::dwarf2_cu (dwarf2_per_cu_data
*per_cu
,
24247 dwarf2_per_objfile
*per_objfile
)
24249 per_objfile (per_objfile
),
24251 has_loclist (false),
24252 checked_producer (false),
24253 producer_is_gxx_lt_4_6 (false),
24254 producer_is_gcc_lt_4_3 (false),
24255 producer_is_icc (false),
24256 producer_is_icc_lt_14 (false),
24257 producer_is_codewarrior (false),
24258 processing_has_namespace_info (false)
24262 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
24265 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
24266 enum language pretend_language
)
24268 struct attribute
*attr
;
24270 /* Set the language we're debugging. */
24271 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
24272 if (attr
!= nullptr)
24273 set_cu_language (DW_UNSND (attr
), cu
);
24276 cu
->language
= pretend_language
;
24277 cu
->language_defn
= language_def (cu
->language
);
24280 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
24286 dwarf2_per_objfile::get_cu (dwarf2_per_cu_data
*per_cu
)
24288 auto it
= m_dwarf2_cus
.find (per_cu
);
24289 if (it
== m_dwarf2_cus
.end ())
24298 dwarf2_per_objfile::set_cu (dwarf2_per_cu_data
*per_cu
, dwarf2_cu
*cu
)
24300 gdb_assert (this->get_cu (per_cu
) == nullptr);
24302 m_dwarf2_cus
[per_cu
] = cu
;
24308 dwarf2_per_objfile::age_comp_units ()
24310 /* Start by clearing all marks. */
24311 for (auto pair
: m_dwarf2_cus
)
24312 pair
.second
->mark
= false;
24314 /* Traverse all CUs, mark them and their dependencies if used recently
24316 for (auto pair
: m_dwarf2_cus
)
24318 dwarf2_cu
*cu
= pair
.second
;
24321 if (cu
->last_used
<= dwarf_max_cache_age
)
24325 /* Delete all CUs still not marked. */
24326 for (auto it
= m_dwarf2_cus
.begin (); it
!= m_dwarf2_cus
.end ();)
24328 dwarf2_cu
*cu
= it
->second
;
24333 it
= m_dwarf2_cus
.erase (it
);
24343 dwarf2_per_objfile::remove_cu (dwarf2_per_cu_data
*per_cu
)
24345 auto it
= m_dwarf2_cus
.find (per_cu
);
24346 if (it
== m_dwarf2_cus
.end ())
24351 m_dwarf2_cus
.erase (it
);
24354 dwarf2_per_objfile::~dwarf2_per_objfile ()
24359 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
24360 We store these in a hash table separate from the DIEs, and preserve them
24361 when the DIEs are flushed out of cache.
24363 The CU "per_cu" pointer is needed because offset alone is not enough to
24364 uniquely identify the type. A file may have multiple .debug_types sections,
24365 or the type may come from a DWO file. Furthermore, while it's more logical
24366 to use per_cu->section+offset, with Fission the section with the data is in
24367 the DWO file but we don't know that section at the point we need it.
24368 We have to use something in dwarf2_per_cu_data (or the pointer to it)
24369 because we can enter the lookup routine, get_die_type_at_offset, from
24370 outside this file, and thus won't necessarily have PER_CU->cu.
24371 Fortunately, PER_CU is stable for the life of the objfile. */
24373 struct dwarf2_per_cu_offset_and_type
24375 const struct dwarf2_per_cu_data
*per_cu
;
24376 sect_offset sect_off
;
24380 /* Hash function for a dwarf2_per_cu_offset_and_type. */
24383 per_cu_offset_and_type_hash (const void *item
)
24385 const struct dwarf2_per_cu_offset_and_type
*ofs
24386 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
24388 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
24391 /* Equality function for a dwarf2_per_cu_offset_and_type. */
24394 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
24396 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
24397 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
24398 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
24399 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
24401 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
24402 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
24405 /* Set the type associated with DIE to TYPE. Save it in CU's hash
24406 table if necessary. For convenience, return TYPE.
24408 The DIEs reading must have careful ordering to:
24409 * Not cause infinite loops trying to read in DIEs as a prerequisite for
24410 reading current DIE.
24411 * Not trying to dereference contents of still incompletely read in types
24412 while reading in other DIEs.
24413 * Enable referencing still incompletely read in types just by a pointer to
24414 the type without accessing its fields.
24416 Therefore caller should follow these rules:
24417 * Try to fetch any prerequisite types we may need to build this DIE type
24418 before building the type and calling set_die_type.
24419 * After building type call set_die_type for current DIE as soon as
24420 possible before fetching more types to complete the current type.
24421 * Make the type as complete as possible before fetching more types. */
24423 static struct type
*
24424 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
24426 dwarf2_per_objfile
*per_objfile
= cu
->per_objfile
;
24427 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
24428 struct objfile
*objfile
= per_objfile
->objfile
;
24429 struct attribute
*attr
;
24430 struct dynamic_prop prop
;
24432 /* For Ada types, make sure that the gnat-specific data is always
24433 initialized (if not already set). There are a few types where
24434 we should not be doing so, because the type-specific area is
24435 already used to hold some other piece of info (eg: TYPE_CODE_FLT
24436 where the type-specific area is used to store the floatformat).
24437 But this is not a problem, because the gnat-specific information
24438 is actually not needed for these types. */
24439 if (need_gnat_info (cu
)
24440 && type
->code () != TYPE_CODE_FUNC
24441 && type
->code () != TYPE_CODE_FLT
24442 && type
->code () != TYPE_CODE_METHODPTR
24443 && type
->code () != TYPE_CODE_MEMBERPTR
24444 && type
->code () != TYPE_CODE_METHOD
24445 && !HAVE_GNAT_AUX_INFO (type
))
24446 INIT_GNAT_SPECIFIC (type
);
24448 /* Read DW_AT_allocated and set in type. */
24449 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
24452 struct type
*prop_type
= cu
->addr_sized_int_type (false);
24453 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
24454 type
->add_dyn_prop (DYN_PROP_ALLOCATED
, prop
);
24457 /* Read DW_AT_associated and set in type. */
24458 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
24461 struct type
*prop_type
= cu
->addr_sized_int_type (false);
24462 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, prop_type
))
24463 type
->add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
);
24466 /* Read DW_AT_data_location and set in type. */
24467 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
24468 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
, cu
->addr_type ()))
24469 type
->add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
);
24471 if (per_objfile
->die_type_hash
== NULL
)
24472 per_objfile
->die_type_hash
24473 = htab_up (htab_create_alloc (127,
24474 per_cu_offset_and_type_hash
,
24475 per_cu_offset_and_type_eq
,
24476 NULL
, xcalloc
, xfree
));
24478 ofs
.per_cu
= cu
->per_cu
;
24479 ofs
.sect_off
= die
->sect_off
;
24481 slot
= (struct dwarf2_per_cu_offset_and_type
**)
24482 htab_find_slot (per_objfile
->die_type_hash
.get (), &ofs
, INSERT
);
24484 complaint (_("A problem internal to GDB: DIE %s has type already set"),
24485 sect_offset_str (die
->sect_off
));
24486 *slot
= XOBNEW (&objfile
->objfile_obstack
,
24487 struct dwarf2_per_cu_offset_and_type
);
24492 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
24493 or return NULL if the die does not have a saved type. */
24495 static struct type
*
24496 get_die_type_at_offset (sect_offset sect_off
,
24497 dwarf2_per_cu_data
*per_cu
,
24498 dwarf2_per_objfile
*per_objfile
)
24500 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
24502 if (per_objfile
->die_type_hash
== NULL
)
24505 ofs
.per_cu
= per_cu
;
24506 ofs
.sect_off
= sect_off
;
24507 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
24508 htab_find (per_objfile
->die_type_hash
.get (), &ofs
));
24515 /* Look up the type for DIE in CU in die_type_hash,
24516 or return NULL if DIE does not have a saved type. */
24518 static struct type
*
24519 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
24521 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
, cu
->per_objfile
);
24524 /* Add a dependence relationship from CU to REF_PER_CU. */
24527 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
24528 struct dwarf2_per_cu_data
*ref_per_cu
)
24532 if (cu
->dependencies
== NULL
)
24534 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
24535 NULL
, &cu
->comp_unit_obstack
,
24536 hashtab_obstack_allocate
,
24537 dummy_obstack_deallocate
);
24539 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
24541 *slot
= ref_per_cu
;
24544 /* Subroutine of dwarf2_mark to pass to htab_traverse.
24545 Set the mark field in every compilation unit in the
24546 cache that we must keep because we are keeping CU.
24548 DATA is the dwarf2_per_objfile object in which to look up CUs. */
24551 dwarf2_mark_helper (void **slot
, void *data
)
24553 dwarf2_per_cu_data
*per_cu
= (dwarf2_per_cu_data
*) *slot
;
24554 dwarf2_per_objfile
*per_objfile
= (dwarf2_per_objfile
*) data
;
24555 dwarf2_cu
*cu
= per_objfile
->get_cu (per_cu
);
24557 /* cu->dependencies references may not yet have been ever read if QUIT aborts
24558 reading of the chain. As such dependencies remain valid it is not much
24559 useful to track and undo them during QUIT cleanups. */
24568 if (cu
->dependencies
!= nullptr)
24569 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, per_objfile
);
24574 /* Set the mark field in CU and in every other compilation unit in the
24575 cache that we must keep because we are keeping CU. */
24578 dwarf2_mark (struct dwarf2_cu
*cu
)
24585 if (cu
->dependencies
!= nullptr)
24586 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, cu
->per_objfile
);
24589 /* Trivial hash function for partial_die_info: the hash value of a DIE
24590 is its offset in .debug_info for this objfile. */
24593 partial_die_hash (const void *item
)
24595 const struct partial_die_info
*part_die
24596 = (const struct partial_die_info
*) item
;
24598 return to_underlying (part_die
->sect_off
);
24601 /* Trivial comparison function for partial_die_info structures: two DIEs
24602 are equal if they have the same offset. */
24605 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
24607 const struct partial_die_info
*part_die_lhs
24608 = (const struct partial_die_info
*) item_lhs
;
24609 const struct partial_die_info
*part_die_rhs
24610 = (const struct partial_die_info
*) item_rhs
;
24612 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
24615 struct cmd_list_element
*set_dwarf_cmdlist
;
24616 struct cmd_list_element
*show_dwarf_cmdlist
;
24619 show_check_physname (struct ui_file
*file
, int from_tty
,
24620 struct cmd_list_element
*c
, const char *value
)
24622 fprintf_filtered (file
,
24623 _("Whether to check \"physname\" is %s.\n"),
24627 void _initialize_dwarf2_read ();
24629 _initialize_dwarf2_read ()
24631 add_basic_prefix_cmd ("dwarf", class_maintenance
, _("\
24632 Set DWARF specific variables.\n\
24633 Configure DWARF variables such as the cache size."),
24634 &set_dwarf_cmdlist
, "maintenance set dwarf ",
24635 0/*allow-unknown*/, &maintenance_set_cmdlist
);
24637 add_show_prefix_cmd ("dwarf", class_maintenance
, _("\
24638 Show DWARF specific variables.\n\
24639 Show DWARF variables such as the cache size."),
24640 &show_dwarf_cmdlist
, "maintenance show dwarf ",
24641 0/*allow-unknown*/, &maintenance_show_cmdlist
);
24643 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
24644 &dwarf_max_cache_age
, _("\
24645 Set the upper bound on the age of cached DWARF compilation units."), _("\
24646 Show the upper bound on the age of cached DWARF compilation units."), _("\
24647 A higher limit means that cached compilation units will be stored\n\
24648 in memory longer, and more total memory will be used. Zero disables\n\
24649 caching, which can slow down startup."),
24651 show_dwarf_max_cache_age
,
24652 &set_dwarf_cmdlist
,
24653 &show_dwarf_cmdlist
);
24655 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
24656 Set debugging of the DWARF reader."), _("\
24657 Show debugging of the DWARF reader."), _("\
24658 When enabled (non-zero), debugging messages are printed during DWARF\n\
24659 reading and symtab expansion. A value of 1 (one) provides basic\n\
24660 information. A value greater than 1 provides more verbose information."),
24663 &setdebuglist
, &showdebuglist
);
24665 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
24666 Set debugging of the DWARF DIE reader."), _("\
24667 Show debugging of the DWARF DIE reader."), _("\
24668 When enabled (non-zero), DIEs are dumped after they are read in.\n\
24669 The value is the maximum depth to print."),
24672 &setdebuglist
, &showdebuglist
);
24674 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
24675 Set debugging of the dwarf line reader."), _("\
24676 Show debugging of the dwarf line reader."), _("\
24677 When enabled (non-zero), line number entries are dumped as they are read in.\n\
24678 A value of 1 (one) provides basic information.\n\
24679 A value greater than 1 provides more verbose information."),
24682 &setdebuglist
, &showdebuglist
);
24684 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
24685 Set cross-checking of \"physname\" code against demangler."), _("\
24686 Show cross-checking of \"physname\" code against demangler."), _("\
24687 When enabled, GDB's internal \"physname\" code is checked against\n\
24689 NULL
, show_check_physname
,
24690 &setdebuglist
, &showdebuglist
);
24692 add_setshow_boolean_cmd ("use-deprecated-index-sections",
24693 no_class
, &use_deprecated_index_sections
, _("\
24694 Set whether to use deprecated gdb_index sections."), _("\
24695 Show whether to use deprecated gdb_index sections."), _("\
24696 When enabled, deprecated .gdb_index sections are used anyway.\n\
24697 Normally they are ignored either because of a missing feature or\n\
24698 performance issue.\n\
24699 Warning: This option must be enabled before gdb reads the file."),
24702 &setlist
, &showlist
);
24704 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
24705 &dwarf2_locexpr_funcs
);
24706 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
24707 &dwarf2_loclist_funcs
);
24709 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
24710 &dwarf2_block_frame_base_locexpr_funcs
);
24711 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
24712 &dwarf2_block_frame_base_loclist_funcs
);
24715 selftests::register_test ("dw2_expand_symtabs_matching",
24716 selftests::dw2_expand_symtabs_matching::run_test
);
24717 selftests::register_test ("dwarf2_find_containing_comp_unit",
24718 selftests::find_containing_comp_unit::run_test
);