1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2018 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 "dwarf2read.h"
33 #include "dwarf-index-common.h"
42 #include "gdb-demangle.h"
43 #include "expression.h"
44 #include "filenames.h" /* for DOSish file names */
47 #include "complaints.h"
49 #include "dwarf2expr.h"
50 #include "dwarf2loc.h"
51 #include "cp-support.h"
57 #include "typeprint.h"
60 #include "completer.h"
65 #include "gdbcore.h" /* for gnutarget */
66 #include "gdb/gdb-index.h"
71 #include "filestuff.h"
73 #include "namespace.h"
74 #include "common/gdb_unlinker.h"
75 #include "common/function-view.h"
76 #include "common/gdb_optional.h"
77 #include "common/underlying.h"
78 #include "common/byte-vector.h"
79 #include "common/hash_enum.h"
80 #include "filename-seen-cache.h"
83 #include <sys/types.h>
85 #include <unordered_set>
86 #include <unordered_map>
90 #include <forward_list>
91 #include "rust-lang.h"
92 #include "common/pathstuff.h"
94 /* When == 1, print basic high level tracing messages.
95 When > 1, be more verbose.
96 This is in contrast to the low level DIE reading of dwarf_die_debug. */
97 static unsigned int dwarf_read_debug
= 0;
99 /* When non-zero, dump DIEs after they are read in. */
100 static unsigned int dwarf_die_debug
= 0;
102 /* When non-zero, dump line number entries as they are read in. */
103 static unsigned int dwarf_line_debug
= 0;
105 /* When non-zero, cross-check physname against demangler. */
106 static int check_physname
= 0;
108 /* When non-zero, do not reject deprecated .gdb_index sections. */
109 static int use_deprecated_index_sections
= 0;
111 static const struct objfile_data
*dwarf2_objfile_data_key
;
113 /* The "aclass" indices for various kinds of computed DWARF symbols. */
115 static int dwarf2_locexpr_index
;
116 static int dwarf2_loclist_index
;
117 static int dwarf2_locexpr_block_index
;
118 static int dwarf2_loclist_block_index
;
120 /* An index into a (C++) symbol name component in a symbol name as
121 recorded in the mapped_index's symbol table. For each C++ symbol
122 in the symbol table, we record one entry for the start of each
123 component in the symbol in a table of name components, and then
124 sort the table, in order to be able to binary search symbol names,
125 ignoring leading namespaces, both completion and regular look up.
126 For example, for symbol "A::B::C", we'll have an entry that points
127 to "A::B::C", another that points to "B::C", and another for "C".
128 Note that function symbols in GDB index have no parameter
129 information, just the function/method names. You can convert a
130 name_component to a "const char *" using the
131 'mapped_index::symbol_name_at(offset_type)' method. */
133 struct name_component
135 /* Offset in the symbol name where the component starts. Stored as
136 a (32-bit) offset instead of a pointer to save memory and improve
137 locality on 64-bit architectures. */
138 offset_type name_offset
;
140 /* The symbol's index in the symbol and constant pool tables of a
145 /* Base class containing bits shared by both .gdb_index and
146 .debug_name indexes. */
148 struct mapped_index_base
150 mapped_index_base () = default;
151 DISABLE_COPY_AND_ASSIGN (mapped_index_base
);
153 /* The name_component table (a sorted vector). See name_component's
154 description above. */
155 std::vector
<name_component
> name_components
;
157 /* How NAME_COMPONENTS is sorted. */
158 enum case_sensitivity name_components_casing
;
160 /* Return the number of names in the symbol table. */
161 virtual size_t symbol_name_count () const = 0;
163 /* Get the name of the symbol at IDX in the symbol table. */
164 virtual const char *symbol_name_at (offset_type idx
) const = 0;
166 /* Return whether the name at IDX in the symbol table should be
168 virtual bool symbol_name_slot_invalid (offset_type idx
) const
173 /* Build the symbol name component sorted vector, if we haven't
175 void build_name_components ();
177 /* Returns the lower (inclusive) and upper (exclusive) bounds of the
178 possible matches for LN_NO_PARAMS in the name component
180 std::pair
<std::vector
<name_component
>::const_iterator
,
181 std::vector
<name_component
>::const_iterator
>
182 find_name_components_bounds (const lookup_name_info
&ln_no_params
) const;
184 /* Prevent deleting/destroying via a base class pointer. */
186 ~mapped_index_base() = default;
189 /* A description of the mapped index. The file format is described in
190 a comment by the code that writes the index. */
191 struct mapped_index final
: public mapped_index_base
193 /* A slot/bucket in the symbol table hash. */
194 struct symbol_table_slot
196 const offset_type name
;
197 const offset_type vec
;
200 /* Index data format version. */
203 /* The address table data. */
204 gdb::array_view
<const gdb_byte
> address_table
;
206 /* The symbol table, implemented as a hash table. */
207 gdb::array_view
<symbol_table_slot
> symbol_table
;
209 /* A pointer to the constant pool. */
210 const char *constant_pool
= nullptr;
212 bool symbol_name_slot_invalid (offset_type idx
) const override
214 const auto &bucket
= this->symbol_table
[idx
];
215 return bucket
.name
== 0 && bucket
.vec
;
218 /* Convenience method to get at the name of the symbol at IDX in the
220 const char *symbol_name_at (offset_type idx
) const override
221 { return this->constant_pool
+ MAYBE_SWAP (this->symbol_table
[idx
].name
); }
223 size_t symbol_name_count () const override
224 { return this->symbol_table
.size (); }
227 /* A description of the mapped .debug_names.
228 Uninitialized map has CU_COUNT 0. */
229 struct mapped_debug_names final
: public mapped_index_base
231 mapped_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile_
)
232 : dwarf2_per_objfile (dwarf2_per_objfile_
)
235 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
236 bfd_endian dwarf5_byte_order
;
237 bool dwarf5_is_dwarf64
;
238 bool augmentation_is_gdb
;
240 uint32_t cu_count
= 0;
241 uint32_t tu_count
, bucket_count
, name_count
;
242 const gdb_byte
*cu_table_reordered
, *tu_table_reordered
;
243 const uint32_t *bucket_table_reordered
, *hash_table_reordered
;
244 const gdb_byte
*name_table_string_offs_reordered
;
245 const gdb_byte
*name_table_entry_offs_reordered
;
246 const gdb_byte
*entry_pool
;
253 /* Attribute name DW_IDX_*. */
256 /* Attribute form DW_FORM_*. */
259 /* Value if FORM is DW_FORM_implicit_const. */
260 LONGEST implicit_const
;
262 std::vector
<attr
> attr_vec
;
265 std::unordered_map
<ULONGEST
, index_val
> abbrev_map
;
267 const char *namei_to_name (uint32_t namei
) const;
269 /* Implementation of the mapped_index_base virtual interface, for
270 the name_components cache. */
272 const char *symbol_name_at (offset_type idx
) const override
273 { return namei_to_name (idx
); }
275 size_t symbol_name_count () const override
276 { return this->name_count
; }
279 /* See dwarf2read.h. */
282 get_dwarf2_per_objfile (struct objfile
*objfile
)
284 return ((struct dwarf2_per_objfile
*)
285 objfile_data (objfile
, dwarf2_objfile_data_key
));
288 /* Set the dwarf2_per_objfile associated to OBJFILE. */
291 set_dwarf2_per_objfile (struct objfile
*objfile
,
292 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
294 gdb_assert (get_dwarf2_per_objfile (objfile
) == NULL
);
295 set_objfile_data (objfile
, dwarf2_objfile_data_key
, dwarf2_per_objfile
);
298 /* Default names of the debugging sections. */
300 /* Note that if the debugging section has been compressed, it might
301 have a name like .zdebug_info. */
303 static const struct dwarf2_debug_sections dwarf2_elf_names
=
305 { ".debug_info", ".zdebug_info" },
306 { ".debug_abbrev", ".zdebug_abbrev" },
307 { ".debug_line", ".zdebug_line" },
308 { ".debug_loc", ".zdebug_loc" },
309 { ".debug_loclists", ".zdebug_loclists" },
310 { ".debug_macinfo", ".zdebug_macinfo" },
311 { ".debug_macro", ".zdebug_macro" },
312 { ".debug_str", ".zdebug_str" },
313 { ".debug_line_str", ".zdebug_line_str" },
314 { ".debug_ranges", ".zdebug_ranges" },
315 { ".debug_rnglists", ".zdebug_rnglists" },
316 { ".debug_types", ".zdebug_types" },
317 { ".debug_addr", ".zdebug_addr" },
318 { ".debug_frame", ".zdebug_frame" },
319 { ".eh_frame", NULL
},
320 { ".gdb_index", ".zgdb_index" },
321 { ".debug_names", ".zdebug_names" },
322 { ".debug_aranges", ".zdebug_aranges" },
326 /* List of DWO/DWP sections. */
328 static const struct dwop_section_names
330 struct dwarf2_section_names abbrev_dwo
;
331 struct dwarf2_section_names info_dwo
;
332 struct dwarf2_section_names line_dwo
;
333 struct dwarf2_section_names loc_dwo
;
334 struct dwarf2_section_names loclists_dwo
;
335 struct dwarf2_section_names macinfo_dwo
;
336 struct dwarf2_section_names macro_dwo
;
337 struct dwarf2_section_names str_dwo
;
338 struct dwarf2_section_names str_offsets_dwo
;
339 struct dwarf2_section_names types_dwo
;
340 struct dwarf2_section_names cu_index
;
341 struct dwarf2_section_names tu_index
;
345 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
346 { ".debug_info.dwo", ".zdebug_info.dwo" },
347 { ".debug_line.dwo", ".zdebug_line.dwo" },
348 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
349 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
350 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
351 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
352 { ".debug_str.dwo", ".zdebug_str.dwo" },
353 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
354 { ".debug_types.dwo", ".zdebug_types.dwo" },
355 { ".debug_cu_index", ".zdebug_cu_index" },
356 { ".debug_tu_index", ".zdebug_tu_index" },
359 /* local data types */
361 /* The data in a compilation unit header, after target2host
362 translation, looks like this. */
363 struct comp_unit_head
367 unsigned char addr_size
;
368 unsigned char signed_addr_p
;
369 sect_offset abbrev_sect_off
;
371 /* Size of file offsets; either 4 or 8. */
372 unsigned int offset_size
;
374 /* Size of the length field; either 4 or 12. */
375 unsigned int initial_length_size
;
377 enum dwarf_unit_type unit_type
;
379 /* Offset to the first byte of this compilation unit header in the
380 .debug_info section, for resolving relative reference dies. */
381 sect_offset sect_off
;
383 /* Offset to first die in this cu from the start of the cu.
384 This will be the first byte following the compilation unit header. */
385 cu_offset first_die_cu_offset
;
387 /* 64-bit signature of this type unit - it is valid only for
388 UNIT_TYPE DW_UT_type. */
391 /* For types, offset in the type's DIE of the type defined by this TU. */
392 cu_offset type_cu_offset_in_tu
;
395 /* Type used for delaying computation of method physnames.
396 See comments for compute_delayed_physnames. */
397 struct delayed_method_info
399 /* The type to which the method is attached, i.e., its parent class. */
402 /* The index of the method in the type's function fieldlists. */
405 /* The index of the method in the fieldlist. */
408 /* The name of the DIE. */
411 /* The DIE associated with this method. */
412 struct die_info
*die
;
415 /* Internal state when decoding a particular compilation unit. */
418 explicit dwarf2_cu (struct dwarf2_per_cu_data
*per_cu
);
421 DISABLE_COPY_AND_ASSIGN (dwarf2_cu
);
423 /* The header of the compilation unit. */
424 struct comp_unit_head header
{};
426 /* Base address of this compilation unit. */
427 CORE_ADDR base_address
= 0;
429 /* Non-zero if base_address has been set. */
432 /* The language we are debugging. */
433 enum language language
= language_unknown
;
434 const struct language_defn
*language_defn
= nullptr;
436 const char *producer
= nullptr;
438 /* The symtab builder for this CU. This is only non-NULL when full
439 symbols are being read. */
440 std::unique_ptr
<buildsym_compunit
> builder
;
442 /* The generic symbol table building routines have separate lists for
443 file scope symbols and all all other scopes (local scopes). So
444 we need to select the right one to pass to add_symbol_to_list().
445 We do it by keeping a pointer to the correct list in list_in_scope.
447 FIXME: The original dwarf code just treated the file scope as the
448 first local scope, and all other local scopes as nested local
449 scopes, and worked fine. Check to see if we really need to
450 distinguish these in buildsym.c. */
451 struct pending
**list_in_scope
= nullptr;
453 /* Hash table holding all the loaded partial DIEs
454 with partial_die->offset.SECT_OFF as hash. */
455 htab_t partial_dies
= nullptr;
457 /* Storage for things with the same lifetime as this read-in compilation
458 unit, including partial DIEs. */
459 auto_obstack comp_unit_obstack
;
461 /* When multiple dwarf2_cu structures are living in memory, this field
462 chains them all together, so that they can be released efficiently.
463 We will probably also want a generation counter so that most-recently-used
464 compilation units are cached... */
465 struct dwarf2_per_cu_data
*read_in_chain
= nullptr;
467 /* Backlink to our per_cu entry. */
468 struct dwarf2_per_cu_data
*per_cu
;
470 /* How many compilation units ago was this CU last referenced? */
473 /* A hash table of DIE cu_offset for following references with
474 die_info->offset.sect_off as hash. */
475 htab_t die_hash
= nullptr;
477 /* Full DIEs if read in. */
478 struct die_info
*dies
= nullptr;
480 /* A set of pointers to dwarf2_per_cu_data objects for compilation
481 units referenced by this one. Only set during full symbol processing;
482 partial symbol tables do not have dependencies. */
483 htab_t dependencies
= nullptr;
485 /* Header data from the line table, during full symbol processing. */
486 struct line_header
*line_header
= nullptr;
487 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
488 it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL,
489 this is the DW_TAG_compile_unit die for this CU. We'll hold on
490 to the line header as long as this DIE is being processed. See
491 process_die_scope. */
492 die_info
*line_header_die_owner
= nullptr;
494 /* A list of methods which need to have physnames computed
495 after all type information has been read. */
496 std::vector
<delayed_method_info
> method_list
;
498 /* To be copied to symtab->call_site_htab. */
499 htab_t call_site_htab
= nullptr;
501 /* Non-NULL if this CU came from a DWO file.
502 There is an invariant here that is important to remember:
503 Except for attributes copied from the top level DIE in the "main"
504 (or "stub") file in preparation for reading the DWO file
505 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
506 Either there isn't a DWO file (in which case this is NULL and the point
507 is moot), or there is and either we're not going to read it (in which
508 case this is NULL) or there is and we are reading it (in which case this
510 struct dwo_unit
*dwo_unit
= nullptr;
512 /* The DW_AT_addr_base attribute if present, zero otherwise
513 (zero is a valid value though).
514 Note this value comes from the Fission stub CU/TU's DIE. */
515 ULONGEST addr_base
= 0;
517 /* The DW_AT_ranges_base attribute if present, zero otherwise
518 (zero is a valid value though).
519 Note this value comes from the Fission stub CU/TU's DIE.
520 Also note that the value is zero in the non-DWO case so this value can
521 be used without needing to know whether DWO files are in use or not.
522 N.B. This does not apply to DW_AT_ranges appearing in
523 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
524 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
525 DW_AT_ranges_base *would* have to be applied, and we'd have to care
526 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
527 ULONGEST ranges_base
= 0;
529 /* When reading debug info generated by older versions of rustc, we
530 have to rewrite some union types to be struct types with a
531 variant part. This rewriting must be done after the CU is fully
532 read in, because otherwise at the point of rewriting some struct
533 type might not have been fully processed. So, we keep a list of
534 all such types here and process them after expansion. */
535 std::vector
<struct type
*> rust_unions
;
537 /* Mark used when releasing cached dies. */
538 unsigned int mark
: 1;
540 /* This CU references .debug_loc. See the symtab->locations_valid field.
541 This test is imperfect as there may exist optimized debug code not using
542 any location list and still facing inlining issues if handled as
543 unoptimized code. For a future better test see GCC PR other/32998. */
544 unsigned int has_loclist
: 1;
546 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
547 if all the producer_is_* fields are valid. This information is cached
548 because profiling CU expansion showed excessive time spent in
549 producer_is_gxx_lt_4_6. */
550 unsigned int checked_producer
: 1;
551 unsigned int producer_is_gxx_lt_4_6
: 1;
552 unsigned int producer_is_gcc_lt_4_3
: 1;
553 unsigned int producer_is_icc_lt_14
: 1;
555 /* When set, the file that we're processing is known to have
556 debugging info for C++ namespaces. GCC 3.3.x did not produce
557 this information, but later versions do. */
559 unsigned int processing_has_namespace_info
: 1;
561 struct partial_die_info
*find_partial_die (sect_offset sect_off
);
564 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
565 This includes type_unit_group and quick_file_names. */
567 struct stmt_list_hash
569 /* The DWO unit this table is from or NULL if there is none. */
570 struct dwo_unit
*dwo_unit
;
572 /* Offset in .debug_line or .debug_line.dwo. */
573 sect_offset line_sect_off
;
576 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
577 an object of this type. */
579 struct type_unit_group
581 /* dwarf2read.c's main "handle" on a TU symtab.
582 To simplify things we create an artificial CU that "includes" all the
583 type units using this stmt_list so that the rest of the code still has
584 a "per_cu" handle on the symtab.
585 This PER_CU is recognized by having no section. */
586 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
587 struct dwarf2_per_cu_data per_cu
;
589 /* The TUs that share this DW_AT_stmt_list entry.
590 This is added to while parsing type units to build partial symtabs,
591 and is deleted afterwards and not used again. */
592 VEC (sig_type_ptr
) *tus
;
594 /* The compunit symtab.
595 Type units in a group needn't all be defined in the same source file,
596 so we create an essentially anonymous symtab as the compunit symtab. */
597 struct compunit_symtab
*compunit_symtab
;
599 /* The data used to construct the hash key. */
600 struct stmt_list_hash hash
;
602 /* The number of symtabs from the line header.
603 The value here must match line_header.num_file_names. */
604 unsigned int num_symtabs
;
606 /* The symbol tables for this TU (obtained from the files listed in
608 WARNING: The order of entries here must match the order of entries
609 in the line header. After the first TU using this type_unit_group, the
610 line header for the subsequent TUs is recreated from this. This is done
611 because we need to use the same symtabs for each TU using the same
612 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
613 there's no guarantee the line header doesn't have duplicate entries. */
614 struct symtab
**symtabs
;
617 /* These sections are what may appear in a (real or virtual) DWO file. */
621 struct dwarf2_section_info abbrev
;
622 struct dwarf2_section_info line
;
623 struct dwarf2_section_info loc
;
624 struct dwarf2_section_info loclists
;
625 struct dwarf2_section_info macinfo
;
626 struct dwarf2_section_info macro
;
627 struct dwarf2_section_info str
;
628 struct dwarf2_section_info str_offsets
;
629 /* In the case of a virtual DWO file, these two are unused. */
630 struct dwarf2_section_info info
;
631 VEC (dwarf2_section_info_def
) *types
;
634 /* CUs/TUs in DWP/DWO files. */
638 /* Backlink to the containing struct dwo_file. */
639 struct dwo_file
*dwo_file
;
641 /* The "id" that distinguishes this CU/TU.
642 .debug_info calls this "dwo_id", .debug_types calls this "signature".
643 Since signatures came first, we stick with it for consistency. */
646 /* The section this CU/TU lives in, in the DWO file. */
647 struct dwarf2_section_info
*section
;
649 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
650 sect_offset sect_off
;
653 /* For types, offset in the type's DIE of the type defined by this TU. */
654 cu_offset type_offset_in_tu
;
657 /* include/dwarf2.h defines the DWP section codes.
658 It defines a max value but it doesn't define a min value, which we
659 use for error checking, so provide one. */
661 enum dwp_v2_section_ids
666 /* Data for one DWO file.
668 This includes virtual DWO files (a virtual DWO file is a DWO file as it
669 appears in a DWP file). DWP files don't really have DWO files per se -
670 comdat folding of types "loses" the DWO file they came from, and from
671 a high level view DWP files appear to contain a mass of random types.
672 However, to maintain consistency with the non-DWP case we pretend DWP
673 files contain virtual DWO files, and we assign each TU with one virtual
674 DWO file (generally based on the line and abbrev section offsets -
675 a heuristic that seems to work in practice). */
679 /* The DW_AT_GNU_dwo_name attribute.
680 For virtual DWO files the name is constructed from the section offsets
681 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
682 from related CU+TUs. */
683 const char *dwo_name
;
685 /* The DW_AT_comp_dir attribute. */
686 const char *comp_dir
;
688 /* The bfd, when the file is open. Otherwise this is NULL.
689 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
692 /* The sections that make up this DWO file.
693 Remember that for virtual DWO files in DWP V2, these are virtual
694 sections (for lack of a better name). */
695 struct dwo_sections sections
;
697 /* The CUs in the file.
698 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
699 an extension to handle LLVM's Link Time Optimization output (where
700 multiple source files may be compiled into a single object/dwo pair). */
703 /* Table of TUs in the file.
704 Each element is a struct dwo_unit. */
708 /* These sections are what may appear in a DWP file. */
712 /* These are used by both DWP version 1 and 2. */
713 struct dwarf2_section_info str
;
714 struct dwarf2_section_info cu_index
;
715 struct dwarf2_section_info tu_index
;
717 /* These are only used by DWP version 2 files.
718 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
719 sections are referenced by section number, and are not recorded here.
720 In DWP version 2 there is at most one copy of all these sections, each
721 section being (effectively) comprised of the concatenation of all of the
722 individual sections that exist in the version 1 format.
723 To keep the code simple we treat each of these concatenated pieces as a
724 section itself (a virtual section?). */
725 struct dwarf2_section_info abbrev
;
726 struct dwarf2_section_info info
;
727 struct dwarf2_section_info line
;
728 struct dwarf2_section_info loc
;
729 struct dwarf2_section_info macinfo
;
730 struct dwarf2_section_info macro
;
731 struct dwarf2_section_info str_offsets
;
732 struct dwarf2_section_info types
;
735 /* These sections are what may appear in a virtual DWO file in DWP version 1.
736 A virtual DWO file is a DWO file as it appears in a DWP file. */
738 struct virtual_v1_dwo_sections
740 struct dwarf2_section_info abbrev
;
741 struct dwarf2_section_info line
;
742 struct dwarf2_section_info loc
;
743 struct dwarf2_section_info macinfo
;
744 struct dwarf2_section_info macro
;
745 struct dwarf2_section_info str_offsets
;
746 /* Each DWP hash table entry records one CU or one TU.
747 That is recorded here, and copied to dwo_unit.section. */
748 struct dwarf2_section_info info_or_types
;
751 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
752 In version 2, the sections of the DWO files are concatenated together
753 and stored in one section of that name. Thus each ELF section contains
754 several "virtual" sections. */
756 struct virtual_v2_dwo_sections
758 bfd_size_type abbrev_offset
;
759 bfd_size_type abbrev_size
;
761 bfd_size_type line_offset
;
762 bfd_size_type line_size
;
764 bfd_size_type loc_offset
;
765 bfd_size_type loc_size
;
767 bfd_size_type macinfo_offset
;
768 bfd_size_type macinfo_size
;
770 bfd_size_type macro_offset
;
771 bfd_size_type macro_size
;
773 bfd_size_type str_offsets_offset
;
774 bfd_size_type str_offsets_size
;
776 /* Each DWP hash table entry records one CU or one TU.
777 That is recorded here, and copied to dwo_unit.section. */
778 bfd_size_type info_or_types_offset
;
779 bfd_size_type info_or_types_size
;
782 /* Contents of DWP hash tables. */
784 struct dwp_hash_table
786 uint32_t version
, nr_columns
;
787 uint32_t nr_units
, nr_slots
;
788 const gdb_byte
*hash_table
, *unit_table
;
793 const gdb_byte
*indices
;
797 /* This is indexed by column number and gives the id of the section
799 #define MAX_NR_V2_DWO_SECTIONS \
800 (1 /* .debug_info or .debug_types */ \
801 + 1 /* .debug_abbrev */ \
802 + 1 /* .debug_line */ \
803 + 1 /* .debug_loc */ \
804 + 1 /* .debug_str_offsets */ \
805 + 1 /* .debug_macro or .debug_macinfo */)
806 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
807 const gdb_byte
*offsets
;
808 const gdb_byte
*sizes
;
813 /* Data for one DWP file. */
817 dwp_file (const char *name_
, gdb_bfd_ref_ptr
&&abfd
)
819 dbfd (std::move (abfd
))
823 /* Name of the file. */
826 /* File format version. */
830 gdb_bfd_ref_ptr dbfd
;
832 /* Section info for this file. */
833 struct dwp_sections sections
{};
835 /* Table of CUs in the file. */
836 const struct dwp_hash_table
*cus
= nullptr;
838 /* Table of TUs in the file. */
839 const struct dwp_hash_table
*tus
= nullptr;
841 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
842 htab_t loaded_cus
{};
843 htab_t loaded_tus
{};
845 /* Table to map ELF section numbers to their sections.
846 This is only needed for the DWP V1 file format. */
847 unsigned int num_sections
= 0;
848 asection
**elf_sections
= nullptr;
851 /* This represents a '.dwz' file. */
855 dwz_file (gdb_bfd_ref_ptr
&&bfd
)
856 : dwz_bfd (std::move (bfd
))
860 /* A dwz file can only contain a few sections. */
861 struct dwarf2_section_info abbrev
{};
862 struct dwarf2_section_info info
{};
863 struct dwarf2_section_info str
{};
864 struct dwarf2_section_info line
{};
865 struct dwarf2_section_info macro
{};
866 struct dwarf2_section_info gdb_index
{};
867 struct dwarf2_section_info debug_names
{};
870 gdb_bfd_ref_ptr dwz_bfd
;
873 /* Struct used to pass misc. parameters to read_die_and_children, et
874 al. which are used for both .debug_info and .debug_types dies.
875 All parameters here are unchanging for the life of the call. This
876 struct exists to abstract away the constant parameters of die reading. */
878 struct die_reader_specs
880 /* The bfd of die_section. */
883 /* The CU of the DIE we are parsing. */
884 struct dwarf2_cu
*cu
;
886 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
887 struct dwo_file
*dwo_file
;
889 /* The section the die comes from.
890 This is either .debug_info or .debug_types, or the .dwo variants. */
891 struct dwarf2_section_info
*die_section
;
893 /* die_section->buffer. */
894 const gdb_byte
*buffer
;
896 /* The end of the buffer. */
897 const gdb_byte
*buffer_end
;
899 /* The value of the DW_AT_comp_dir attribute. */
900 const char *comp_dir
;
902 /* The abbreviation table to use when reading the DIEs. */
903 struct abbrev_table
*abbrev_table
;
906 /* Type of function passed to init_cutu_and_read_dies, et.al. */
907 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
908 const gdb_byte
*info_ptr
,
909 struct die_info
*comp_unit_die
,
913 /* A 1-based directory index. This is a strong typedef to prevent
914 accidentally using a directory index as a 0-based index into an
916 enum class dir_index
: unsigned int {};
918 /* Likewise, a 1-based file name index. */
919 enum class file_name_index
: unsigned int {};
923 file_entry () = default;
925 file_entry (const char *name_
, dir_index d_index_
,
926 unsigned int mod_time_
, unsigned int length_
)
929 mod_time (mod_time_
),
933 /* Return the include directory at D_INDEX stored in LH. Returns
934 NULL if D_INDEX is out of bounds. */
935 const char *include_dir (const line_header
*lh
) const;
937 /* The file name. Note this is an observing pointer. The memory is
938 owned by debug_line_buffer. */
941 /* The directory index (1-based). */
942 dir_index d_index
{};
944 unsigned int mod_time
{};
946 unsigned int length
{};
948 /* True if referenced by the Line Number Program. */
951 /* The associated symbol table, if any. */
952 struct symtab
*symtab
{};
955 /* The line number information for a compilation unit (found in the
956 .debug_line section) begins with a "statement program header",
957 which contains the following information. */
964 /* Add an entry to the include directory table. */
965 void add_include_dir (const char *include_dir
);
967 /* Add an entry to the file name table. */
968 void add_file_name (const char *name
, dir_index d_index
,
969 unsigned int mod_time
, unsigned int length
);
971 /* Return the include dir at INDEX (1-based). Returns NULL if INDEX
973 const char *include_dir_at (dir_index index
) const
975 /* Convert directory index number (1-based) to vector index
977 size_t vec_index
= to_underlying (index
) - 1;
979 if (vec_index
>= include_dirs
.size ())
981 return include_dirs
[vec_index
];
984 /* Return the file name at INDEX (1-based). Returns NULL if INDEX
986 file_entry
*file_name_at (file_name_index index
)
988 /* Convert file name index number (1-based) to vector index
990 size_t vec_index
= to_underlying (index
) - 1;
992 if (vec_index
>= file_names
.size ())
994 return &file_names
[vec_index
];
997 /* Const version of the above. */
998 const file_entry
*file_name_at (unsigned int index
) const
1000 if (index
>= file_names
.size ())
1002 return &file_names
[index
];
1005 /* Offset of line number information in .debug_line section. */
1006 sect_offset sect_off
{};
1008 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1009 unsigned offset_in_dwz
: 1; /* Can't initialize bitfields in-class. */
1011 unsigned int total_length
{};
1012 unsigned short version
{};
1013 unsigned int header_length
{};
1014 unsigned char minimum_instruction_length
{};
1015 unsigned char maximum_ops_per_instruction
{};
1016 unsigned char default_is_stmt
{};
1018 unsigned char line_range
{};
1019 unsigned char opcode_base
{};
1021 /* standard_opcode_lengths[i] is the number of operands for the
1022 standard opcode whose value is i. This means that
1023 standard_opcode_lengths[0] is unused, and the last meaningful
1024 element is standard_opcode_lengths[opcode_base - 1]. */
1025 std::unique_ptr
<unsigned char[]> standard_opcode_lengths
;
1027 /* The include_directories table. Note these are observing
1028 pointers. The memory is owned by debug_line_buffer. */
1029 std::vector
<const char *> include_dirs
;
1031 /* The file_names table. */
1032 std::vector
<file_entry
> file_names
;
1034 /* The start and end of the statement program following this
1035 header. These point into dwarf2_per_objfile->line_buffer. */
1036 const gdb_byte
*statement_program_start
{}, *statement_program_end
{};
1039 typedef std::unique_ptr
<line_header
> line_header_up
;
1042 file_entry::include_dir (const line_header
*lh
) const
1044 return lh
->include_dir_at (d_index
);
1047 /* When we construct a partial symbol table entry we only
1048 need this much information. */
1049 struct partial_die_info
: public allocate_on_obstack
1051 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
1053 /* Disable assign but still keep copy ctor, which is needed
1054 load_partial_dies. */
1055 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
1057 /* Adjust the partial die before generating a symbol for it. This
1058 function may set the is_external flag or change the DIE's
1060 void fixup (struct dwarf2_cu
*cu
);
1062 /* Read a minimal amount of information into the minimal die
1064 const gdb_byte
*read (const struct die_reader_specs
*reader
,
1065 const struct abbrev_info
&abbrev
,
1066 const gdb_byte
*info_ptr
);
1068 /* Offset of this DIE. */
1069 const sect_offset sect_off
;
1071 /* DWARF-2 tag for this DIE. */
1072 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1074 /* Assorted flags describing the data found in this DIE. */
1075 const unsigned int has_children
: 1;
1077 unsigned int is_external
: 1;
1078 unsigned int is_declaration
: 1;
1079 unsigned int has_type
: 1;
1080 unsigned int has_specification
: 1;
1081 unsigned int has_pc_info
: 1;
1082 unsigned int may_be_inlined
: 1;
1084 /* This DIE has been marked DW_AT_main_subprogram. */
1085 unsigned int main_subprogram
: 1;
1087 /* Flag set if the SCOPE field of this structure has been
1089 unsigned int scope_set
: 1;
1091 /* Flag set if the DIE has a byte_size attribute. */
1092 unsigned int has_byte_size
: 1;
1094 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1095 unsigned int has_const_value
: 1;
1097 /* Flag set if any of the DIE's children are template arguments. */
1098 unsigned int has_template_arguments
: 1;
1100 /* Flag set if fixup has been called on this die. */
1101 unsigned int fixup_called
: 1;
1103 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1104 unsigned int is_dwz
: 1;
1106 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1107 unsigned int spec_is_dwz
: 1;
1109 /* The name of this DIE. Normally the value of DW_AT_name, but
1110 sometimes a default name for unnamed DIEs. */
1111 const char *name
= nullptr;
1113 /* The linkage name, if present. */
1114 const char *linkage_name
= nullptr;
1116 /* The scope to prepend to our children. This is generally
1117 allocated on the comp_unit_obstack, so will disappear
1118 when this compilation unit leaves the cache. */
1119 const char *scope
= nullptr;
1121 /* Some data associated with the partial DIE. The tag determines
1122 which field is live. */
1125 /* The location description associated with this DIE, if any. */
1126 struct dwarf_block
*locdesc
;
1127 /* The offset of an import, for DW_TAG_imported_unit. */
1128 sect_offset sect_off
;
1131 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1132 CORE_ADDR lowpc
= 0;
1133 CORE_ADDR highpc
= 0;
1135 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1136 DW_AT_sibling, if any. */
1137 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1138 could return DW_AT_sibling values to its caller load_partial_dies. */
1139 const gdb_byte
*sibling
= nullptr;
1141 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1142 DW_AT_specification (or DW_AT_abstract_origin or
1143 DW_AT_extension). */
1144 sect_offset spec_offset
{};
1146 /* Pointers to this DIE's parent, first child, and next sibling,
1148 struct partial_die_info
*die_parent
= nullptr;
1149 struct partial_die_info
*die_child
= nullptr;
1150 struct partial_die_info
*die_sibling
= nullptr;
1152 friend struct partial_die_info
*
1153 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1156 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1157 partial_die_info (sect_offset sect_off
)
1158 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1162 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1164 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1169 has_specification
= 0;
1172 main_subprogram
= 0;
1175 has_const_value
= 0;
1176 has_template_arguments
= 0;
1183 /* This data structure holds the information of an abbrev. */
1186 unsigned int number
; /* number identifying abbrev */
1187 enum dwarf_tag tag
; /* dwarf tag */
1188 unsigned short has_children
; /* boolean */
1189 unsigned short num_attrs
; /* number of attributes */
1190 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1191 struct abbrev_info
*next
; /* next in chain */
1196 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1197 ENUM_BITFIELD(dwarf_form
) form
: 16;
1199 /* It is valid only if FORM is DW_FORM_implicit_const. */
1200 LONGEST implicit_const
;
1203 /* Size of abbrev_table.abbrev_hash_table. */
1204 #define ABBREV_HASH_SIZE 121
1206 /* Top level data structure to contain an abbreviation table. */
1210 explicit abbrev_table (sect_offset off
)
1214 XOBNEWVEC (&abbrev_obstack
, struct abbrev_info
*, ABBREV_HASH_SIZE
);
1215 memset (m_abbrevs
, 0, ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
1218 DISABLE_COPY_AND_ASSIGN (abbrev_table
);
1220 /* Allocate space for a struct abbrev_info object in
1222 struct abbrev_info
*alloc_abbrev ();
1224 /* Add an abbreviation to the table. */
1225 void add_abbrev (unsigned int abbrev_number
, struct abbrev_info
*abbrev
);
1227 /* Look up an abbrev in the table.
1228 Returns NULL if the abbrev is not found. */
1230 struct abbrev_info
*lookup_abbrev (unsigned int abbrev_number
);
1233 /* Where the abbrev table came from.
1234 This is used as a sanity check when the table is used. */
1235 const sect_offset sect_off
;
1237 /* Storage for the abbrev table. */
1238 auto_obstack abbrev_obstack
;
1242 /* Hash table of abbrevs.
1243 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1244 It could be statically allocated, but the previous code didn't so we
1246 struct abbrev_info
**m_abbrevs
;
1249 typedef std::unique_ptr
<struct abbrev_table
> abbrev_table_up
;
1251 /* Attributes have a name and a value. */
1254 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1255 ENUM_BITFIELD(dwarf_form
) form
: 15;
1257 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1258 field should be in u.str (existing only for DW_STRING) but it is kept
1259 here for better struct attribute alignment. */
1260 unsigned int string_is_canonical
: 1;
1265 struct dwarf_block
*blk
;
1274 /* This data structure holds a complete die structure. */
1277 /* DWARF-2 tag for this DIE. */
1278 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1280 /* Number of attributes */
1281 unsigned char num_attrs
;
1283 /* True if we're presently building the full type name for the
1284 type derived from this DIE. */
1285 unsigned char building_fullname
: 1;
1287 /* True if this die is in process. PR 16581. */
1288 unsigned char in_process
: 1;
1291 unsigned int abbrev
;
1293 /* Offset in .debug_info or .debug_types section. */
1294 sect_offset sect_off
;
1296 /* The dies in a compilation unit form an n-ary tree. PARENT
1297 points to this die's parent; CHILD points to the first child of
1298 this node; and all the children of a given node are chained
1299 together via their SIBLING fields. */
1300 struct die_info
*child
; /* Its first child, if any. */
1301 struct die_info
*sibling
; /* Its next sibling, if any. */
1302 struct die_info
*parent
; /* Its parent, if any. */
1304 /* An array of attributes, with NUM_ATTRS elements. There may be
1305 zero, but it's not common and zero-sized arrays are not
1306 sufficiently portable C. */
1307 struct attribute attrs
[1];
1310 /* Get at parts of an attribute structure. */
1312 #define DW_STRING(attr) ((attr)->u.str)
1313 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1314 #define DW_UNSND(attr) ((attr)->u.unsnd)
1315 #define DW_BLOCK(attr) ((attr)->u.blk)
1316 #define DW_SND(attr) ((attr)->u.snd)
1317 #define DW_ADDR(attr) ((attr)->u.addr)
1318 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1320 /* Blocks are a bunch of untyped bytes. */
1325 /* Valid only if SIZE is not zero. */
1326 const gdb_byte
*data
;
1329 #ifndef ATTR_ALLOC_CHUNK
1330 #define ATTR_ALLOC_CHUNK 4
1333 /* Allocate fields for structs, unions and enums in this size. */
1334 #ifndef DW_FIELD_ALLOC_CHUNK
1335 #define DW_FIELD_ALLOC_CHUNK 4
1338 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1339 but this would require a corresponding change in unpack_field_as_long
1341 static int bits_per_byte
= 8;
1343 /* When reading a variant or variant part, we track a bit more
1344 information about the field, and store it in an object of this
1347 struct variant_field
1349 /* If we see a DW_TAG_variant, then this will be the discriminant
1351 ULONGEST discriminant_value
;
1352 /* If we see a DW_TAG_variant, then this will be set if this is the
1354 bool default_branch
;
1355 /* While reading a DW_TAG_variant_part, this will be set if this
1356 field is the discriminant. */
1357 bool is_discriminant
;
1362 int accessibility
= 0;
1364 /* Extra information to describe a variant or variant part. */
1365 struct variant_field variant
{};
1366 struct field field
{};
1371 const char *name
= nullptr;
1372 std::vector
<struct fn_field
> fnfields
;
1375 /* The routines that read and process dies for a C struct or C++ class
1376 pass lists of data member fields and lists of member function fields
1377 in an instance of a field_info structure, as defined below. */
1380 /* List of data member and baseclasses fields. */
1381 std::vector
<struct nextfield
> fields
;
1382 std::vector
<struct nextfield
> baseclasses
;
1384 /* Number of fields (including baseclasses). */
1387 /* Set if the accesibility of one of the fields is not public. */
1388 int non_public_fields
= 0;
1390 /* Member function fieldlist array, contains name of possibly overloaded
1391 member function, number of overloaded member functions and a pointer
1392 to the head of the member function field chain. */
1393 std::vector
<struct fnfieldlist
> fnfieldlists
;
1395 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1396 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1397 std::vector
<struct decl_field
> typedef_field_list
;
1399 /* Nested types defined by this class and the number of elements in this
1401 std::vector
<struct decl_field
> nested_types_list
;
1404 /* One item on the queue of compilation units to read in full symbols
1406 struct dwarf2_queue_item
1408 struct dwarf2_per_cu_data
*per_cu
;
1409 enum language pretend_language
;
1410 struct dwarf2_queue_item
*next
;
1413 /* The current queue. */
1414 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1416 /* Loaded secondary compilation units are kept in memory until they
1417 have not been referenced for the processing of this many
1418 compilation units. Set this to zero to disable caching. Cache
1419 sizes of up to at least twenty will improve startup time for
1420 typical inter-CU-reference binaries, at an obvious memory cost. */
1421 static int dwarf_max_cache_age
= 5;
1423 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1424 struct cmd_list_element
*c
, const char *value
)
1426 fprintf_filtered (file
, _("The upper bound on the age of cached "
1427 "DWARF compilation units is %s.\n"),
1431 /* local function prototypes */
1433 static const char *get_section_name (const struct dwarf2_section_info
*);
1435 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1437 static void dwarf2_find_base_address (struct die_info
*die
,
1438 struct dwarf2_cu
*cu
);
1440 static struct partial_symtab
*create_partial_symtab
1441 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1443 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1444 const gdb_byte
*info_ptr
,
1445 struct die_info
*type_unit_die
,
1446 int has_children
, void *data
);
1448 static void dwarf2_build_psymtabs_hard
1449 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1451 static void scan_partial_symbols (struct partial_die_info
*,
1452 CORE_ADDR
*, CORE_ADDR
*,
1453 int, struct dwarf2_cu
*);
1455 static void add_partial_symbol (struct partial_die_info
*,
1456 struct dwarf2_cu
*);
1458 static void add_partial_namespace (struct partial_die_info
*pdi
,
1459 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1460 int set_addrmap
, struct dwarf2_cu
*cu
);
1462 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1463 CORE_ADDR
*highpc
, int set_addrmap
,
1464 struct dwarf2_cu
*cu
);
1466 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1467 struct dwarf2_cu
*cu
);
1469 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1470 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1471 int need_pc
, struct dwarf2_cu
*cu
);
1473 static void dwarf2_read_symtab (struct partial_symtab
*,
1476 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1478 static abbrev_table_up abbrev_table_read_table
1479 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, struct dwarf2_section_info
*,
1482 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1484 static struct partial_die_info
*load_partial_dies
1485 (const struct die_reader_specs
*, const gdb_byte
*, int);
1487 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1488 struct dwarf2_cu
*);
1490 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1491 struct attribute
*, struct attr_abbrev
*,
1494 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1496 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1498 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1500 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1502 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1504 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1507 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1509 static LONGEST read_checked_initial_length_and_offset
1510 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1511 unsigned int *, unsigned int *);
1513 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1514 const struct comp_unit_head
*,
1517 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1519 static sect_offset read_abbrev_offset
1520 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1521 struct dwarf2_section_info
*, sect_offset
);
1523 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1525 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1527 static const char *read_indirect_string
1528 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1529 const struct comp_unit_head
*, unsigned int *);
1531 static const char *read_indirect_line_string
1532 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1533 const struct comp_unit_head
*, unsigned int *);
1535 static const char *read_indirect_string_at_offset
1536 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
1537 LONGEST str_offset
);
1539 static const char *read_indirect_string_from_dwz
1540 (struct objfile
*objfile
, struct dwz_file
*, LONGEST
);
1542 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1544 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1548 static const char *read_str_index (const struct die_reader_specs
*reader
,
1549 ULONGEST str_index
);
1551 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1553 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1554 struct dwarf2_cu
*);
1556 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1559 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1560 struct dwarf2_cu
*cu
);
1562 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1563 struct dwarf2_cu
*cu
);
1565 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1567 static struct die_info
*die_specification (struct die_info
*die
,
1568 struct dwarf2_cu
**);
1570 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1571 struct dwarf2_cu
*cu
);
1573 static void dwarf_decode_lines (struct line_header
*, const char *,
1574 struct dwarf2_cu
*, struct partial_symtab
*,
1575 CORE_ADDR
, int decode_mapping
);
1577 static void dwarf2_start_subfile (struct dwarf2_cu
*, const char *,
1580 static struct compunit_symtab
*dwarf2_start_symtab (struct dwarf2_cu
*,
1581 const char *, const char *,
1584 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1585 struct dwarf2_cu
*, struct symbol
* = NULL
);
1587 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1588 struct dwarf2_cu
*);
1590 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1593 struct obstack
*obstack
,
1594 struct dwarf2_cu
*cu
, LONGEST
*value
,
1595 const gdb_byte
**bytes
,
1596 struct dwarf2_locexpr_baton
**baton
);
1598 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1600 static int need_gnat_info (struct dwarf2_cu
*);
1602 static struct type
*die_descriptive_type (struct die_info
*,
1603 struct dwarf2_cu
*);
1605 static void set_descriptive_type (struct type
*, struct die_info
*,
1606 struct dwarf2_cu
*);
1608 static struct type
*die_containing_type (struct die_info
*,
1609 struct dwarf2_cu
*);
1611 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1612 struct dwarf2_cu
*);
1614 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1616 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1618 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1620 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1621 const char *suffix
, int physname
,
1622 struct dwarf2_cu
*cu
);
1624 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1626 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1628 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1630 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1632 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1634 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1636 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1637 struct dwarf2_cu
*, struct partial_symtab
*);
1639 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1640 values. Keep the items ordered with increasing constraints compliance. */
1643 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1644 PC_BOUNDS_NOT_PRESENT
,
1646 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1647 were present but they do not form a valid range of PC addresses. */
1650 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1653 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1657 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1658 CORE_ADDR
*, CORE_ADDR
*,
1660 struct partial_symtab
*);
1662 static void get_scope_pc_bounds (struct die_info
*,
1663 CORE_ADDR
*, CORE_ADDR
*,
1664 struct dwarf2_cu
*);
1666 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1667 CORE_ADDR
, struct dwarf2_cu
*);
1669 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1670 struct dwarf2_cu
*);
1672 static void dwarf2_attach_fields_to_type (struct field_info
*,
1673 struct type
*, struct dwarf2_cu
*);
1675 static void dwarf2_add_member_fn (struct field_info
*,
1676 struct die_info
*, struct type
*,
1677 struct dwarf2_cu
*);
1679 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1681 struct dwarf2_cu
*);
1683 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1685 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1687 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1689 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1691 static struct using_direct
**using_directives (struct dwarf2_cu
*cu
);
1693 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1695 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1697 static struct type
*read_module_type (struct die_info
*die
,
1698 struct dwarf2_cu
*cu
);
1700 static const char *namespace_name (struct die_info
*die
,
1701 int *is_anonymous
, struct dwarf2_cu
*);
1703 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1705 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1707 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1708 struct dwarf2_cu
*);
1710 static struct die_info
*read_die_and_siblings_1
1711 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1714 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1715 const gdb_byte
*info_ptr
,
1716 const gdb_byte
**new_info_ptr
,
1717 struct die_info
*parent
);
1719 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1720 struct die_info
**, const gdb_byte
*,
1723 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1724 struct die_info
**, const gdb_byte
*,
1727 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1729 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1732 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1734 static const char *dwarf2_full_name (const char *name
,
1735 struct die_info
*die
,
1736 struct dwarf2_cu
*cu
);
1738 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1739 struct dwarf2_cu
*cu
);
1741 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1742 struct dwarf2_cu
**);
1744 static const char *dwarf_tag_name (unsigned int);
1746 static const char *dwarf_attr_name (unsigned int);
1748 static const char *dwarf_form_name (unsigned int);
1750 static const char *dwarf_bool_name (unsigned int);
1752 static const char *dwarf_type_encoding_name (unsigned int);
1754 static struct die_info
*sibling_die (struct die_info
*);
1756 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1758 static void dump_die_for_error (struct die_info
*);
1760 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1763 /*static*/ void dump_die (struct die_info
*, int max_level
);
1765 static void store_in_ref_table (struct die_info
*,
1766 struct dwarf2_cu
*);
1768 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1770 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1772 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1773 const struct attribute
*,
1774 struct dwarf2_cu
**);
1776 static struct die_info
*follow_die_ref (struct die_info
*,
1777 const struct attribute
*,
1778 struct dwarf2_cu
**);
1780 static struct die_info
*follow_die_sig (struct die_info
*,
1781 const struct attribute
*,
1782 struct dwarf2_cu
**);
1784 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1785 struct dwarf2_cu
*);
1787 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1788 const struct attribute
*,
1789 struct dwarf2_cu
*);
1791 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1793 static void read_signatured_type (struct signatured_type
*);
1795 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1796 struct die_info
*die
, struct dwarf2_cu
*cu
,
1797 struct dynamic_prop
*prop
);
1799 /* memory allocation interface */
1801 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1803 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1805 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1807 static int attr_form_is_block (const struct attribute
*);
1809 static int attr_form_is_section_offset (const struct attribute
*);
1811 static int attr_form_is_constant (const struct attribute
*);
1813 static int attr_form_is_ref (const struct attribute
*);
1815 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1816 struct dwarf2_loclist_baton
*baton
,
1817 const struct attribute
*attr
);
1819 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1821 struct dwarf2_cu
*cu
,
1824 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1825 const gdb_byte
*info_ptr
,
1826 struct abbrev_info
*abbrev
);
1828 static hashval_t
partial_die_hash (const void *item
);
1830 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1832 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1833 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1834 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1836 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1837 struct die_info
*comp_unit_die
,
1838 enum language pretend_language
);
1840 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1842 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1844 static struct type
*set_die_type (struct die_info
*, struct type
*,
1845 struct dwarf2_cu
*);
1847 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1849 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1851 static void load_full_comp_unit (struct dwarf2_per_cu_data
*, bool,
1854 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1857 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1860 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1861 struct dwarf2_per_cu_data
*);
1863 static void dwarf2_mark (struct dwarf2_cu
*);
1865 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1867 static struct type
*get_die_type_at_offset (sect_offset
,
1868 struct dwarf2_per_cu_data
*);
1870 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1872 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1873 enum language pretend_language
);
1875 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1877 /* Class, the destructor of which frees all allocated queue entries. This
1878 will only have work to do if an error was thrown while processing the
1879 dwarf. If no error was thrown then the queue entries should have all
1880 been processed, and freed, as we went along. */
1882 class dwarf2_queue_guard
1885 dwarf2_queue_guard () = default;
1887 /* Free any entries remaining on the queue. There should only be
1888 entries left if we hit an error while processing the dwarf. */
1889 ~dwarf2_queue_guard ()
1891 struct dwarf2_queue_item
*item
, *last
;
1893 item
= dwarf2_queue
;
1896 /* Anything still marked queued is likely to be in an
1897 inconsistent state, so discard it. */
1898 if (item
->per_cu
->queued
)
1900 if (item
->per_cu
->cu
!= NULL
)
1901 free_one_cached_comp_unit (item
->per_cu
);
1902 item
->per_cu
->queued
= 0;
1910 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
1914 /* The return type of find_file_and_directory. Note, the enclosed
1915 string pointers are only valid while this object is valid. */
1917 struct file_and_directory
1919 /* The filename. This is never NULL. */
1922 /* The compilation directory. NULL if not known. If we needed to
1923 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1924 points directly to the DW_AT_comp_dir string attribute owned by
1925 the obstack that owns the DIE. */
1926 const char *comp_dir
;
1928 /* If we needed to build a new string for comp_dir, this is what
1929 owns the storage. */
1930 std::string comp_dir_storage
;
1933 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1934 struct dwarf2_cu
*cu
);
1936 static char *file_full_name (int file
, struct line_header
*lh
,
1937 const char *comp_dir
);
1939 /* Expected enum dwarf_unit_type for read_comp_unit_head. */
1940 enum class rcuh_kind
{ COMPILE
, TYPE
};
1942 static const gdb_byte
*read_and_check_comp_unit_head
1943 (struct dwarf2_per_objfile
* dwarf2_per_objfile
,
1944 struct comp_unit_head
*header
,
1945 struct dwarf2_section_info
*section
,
1946 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1947 rcuh_kind section_kind
);
1949 static void init_cutu_and_read_dies
1950 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1951 int use_existing_cu
, int keep
, bool skip_partial
,
1952 die_reader_func_ftype
*die_reader_func
, void *data
);
1954 static void init_cutu_and_read_dies_simple
1955 (struct dwarf2_per_cu_data
*this_cu
,
1956 die_reader_func_ftype
*die_reader_func
, void *data
);
1958 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1960 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1962 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1963 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1964 struct dwp_file
*dwp_file
, const char *comp_dir
,
1965 ULONGEST signature
, int is_debug_types
);
1967 static struct dwp_file
*get_dwp_file
1968 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1970 static struct dwo_unit
*lookup_dwo_comp_unit
1971 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1973 static struct dwo_unit
*lookup_dwo_type_unit
1974 (struct signatured_type
*, const char *, const char *);
1976 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1978 static void free_dwo_file (struct dwo_file
*);
1980 /* A unique_ptr helper to free a dwo_file. */
1982 struct dwo_file_deleter
1984 void operator() (struct dwo_file
*df
) const
1990 /* A unique pointer to a dwo_file. */
1992 typedef std::unique_ptr
<struct dwo_file
, dwo_file_deleter
> dwo_file_up
;
1994 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1996 static void check_producer (struct dwarf2_cu
*cu
);
1998 static void free_line_header_voidp (void *arg
);
2000 /* Various complaints about symbol reading that don't abort the process. */
2003 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
2005 complaint (_("statement list doesn't fit in .debug_line section"));
2009 dwarf2_debug_line_missing_file_complaint (void)
2011 complaint (_(".debug_line section has line data without a file"));
2015 dwarf2_debug_line_missing_end_sequence_complaint (void)
2017 complaint (_(".debug_line section has line "
2018 "program sequence without an end"));
2022 dwarf2_complex_location_expr_complaint (void)
2024 complaint (_("location expression too complex"));
2028 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
2031 complaint (_("const value length mismatch for '%s', got %d, expected %d"),
2036 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
2038 complaint (_("debug info runs off end of %s section"
2040 get_section_name (section
),
2041 get_section_file_name (section
));
2045 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
2047 complaint (_("macro debug info contains a "
2048 "malformed macro definition:\n`%s'"),
2053 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
2055 complaint (_("invalid attribute class or form for '%s' in '%s'"),
2059 /* Hash function for line_header_hash. */
2062 line_header_hash (const struct line_header
*ofs
)
2064 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
2067 /* Hash function for htab_create_alloc_ex for line_header_hash. */
2070 line_header_hash_voidp (const void *item
)
2072 const struct line_header
*ofs
= (const struct line_header
*) item
;
2074 return line_header_hash (ofs
);
2077 /* Equality function for line_header_hash. */
2080 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
2082 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
2083 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
2085 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
2086 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
2091 /* Read the given attribute value as an address, taking the attribute's
2092 form into account. */
2095 attr_value_as_address (struct attribute
*attr
)
2099 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
2101 /* Aside from a few clearly defined exceptions, attributes that
2102 contain an address must always be in DW_FORM_addr form.
2103 Unfortunately, some compilers happen to be violating this
2104 requirement by encoding addresses using other forms, such
2105 as DW_FORM_data4 for example. For those broken compilers,
2106 we try to do our best, without any guarantee of success,
2107 to interpret the address correctly. It would also be nice
2108 to generate a complaint, but that would require us to maintain
2109 a list of legitimate cases where a non-address form is allowed,
2110 as well as update callers to pass in at least the CU's DWARF
2111 version. This is more overhead than what we're willing to
2112 expand for a pretty rare case. */
2113 addr
= DW_UNSND (attr
);
2116 addr
= DW_ADDR (attr
);
2121 /* See declaration. */
2123 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
2124 const dwarf2_debug_sections
*names
)
2125 : objfile (objfile_
)
2128 names
= &dwarf2_elf_names
;
2130 bfd
*obfd
= objfile
->obfd
;
2132 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2133 locate_sections (obfd
, sec
, *names
);
2136 static void free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
);
2138 dwarf2_per_objfile::~dwarf2_per_objfile ()
2140 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
2141 free_cached_comp_units ();
2143 if (quick_file_names_table
)
2144 htab_delete (quick_file_names_table
);
2146 if (line_header_hash
)
2147 htab_delete (line_header_hash
);
2149 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
2150 VEC_free (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
);
2152 for (signatured_type
*sig_type
: all_type_units
)
2153 VEC_free (dwarf2_per_cu_ptr
, sig_type
->per_cu
.imported_symtabs
);
2155 VEC_free (dwarf2_section_info_def
, types
);
2157 if (dwo_files
!= NULL
)
2158 free_dwo_files (dwo_files
, objfile
);
2160 /* Everything else should be on the objfile obstack. */
2163 /* See declaration. */
2166 dwarf2_per_objfile::free_cached_comp_units ()
2168 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
2169 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
2170 while (per_cu
!= NULL
)
2172 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
2175 *last_chain
= next_cu
;
2180 /* A helper class that calls free_cached_comp_units on
2183 class free_cached_comp_units
2187 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
2188 : m_per_objfile (per_objfile
)
2192 ~free_cached_comp_units ()
2194 m_per_objfile
->free_cached_comp_units ();
2197 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
2201 dwarf2_per_objfile
*m_per_objfile
;
2204 /* Try to locate the sections we need for DWARF 2 debugging
2205 information and return true if we have enough to do something.
2206 NAMES points to the dwarf2 section names, or is NULL if the standard
2207 ELF names are used. */
2210 dwarf2_has_info (struct objfile
*objfile
,
2211 const struct dwarf2_debug_sections
*names
)
2213 if (objfile
->flags
& OBJF_READNEVER
)
2216 struct dwarf2_per_objfile
*dwarf2_per_objfile
2217 = get_dwarf2_per_objfile (objfile
);
2219 if (dwarf2_per_objfile
== NULL
)
2221 /* Initialize per-objfile state. */
2223 = new (&objfile
->objfile_obstack
) struct dwarf2_per_objfile (objfile
,
2225 set_dwarf2_per_objfile (objfile
, dwarf2_per_objfile
);
2227 return (!dwarf2_per_objfile
->info
.is_virtual
2228 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2229 && !dwarf2_per_objfile
->abbrev
.is_virtual
2230 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2233 /* Return the containing section of virtual section SECTION. */
2235 static struct dwarf2_section_info
*
2236 get_containing_section (const struct dwarf2_section_info
*section
)
2238 gdb_assert (section
->is_virtual
);
2239 return section
->s
.containing_section
;
2242 /* Return the bfd owner of SECTION. */
2245 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2247 if (section
->is_virtual
)
2249 section
= get_containing_section (section
);
2250 gdb_assert (!section
->is_virtual
);
2252 return section
->s
.section
->owner
;
2255 /* Return the bfd section of SECTION.
2256 Returns NULL if the section is not present. */
2259 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2261 if (section
->is_virtual
)
2263 section
= get_containing_section (section
);
2264 gdb_assert (!section
->is_virtual
);
2266 return section
->s
.section
;
2269 /* Return the name of SECTION. */
2272 get_section_name (const struct dwarf2_section_info
*section
)
2274 asection
*sectp
= get_section_bfd_section (section
);
2276 gdb_assert (sectp
!= NULL
);
2277 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2280 /* Return the name of the file SECTION is in. */
2283 get_section_file_name (const struct dwarf2_section_info
*section
)
2285 bfd
*abfd
= get_section_bfd_owner (section
);
2287 return bfd_get_filename (abfd
);
2290 /* Return the id of SECTION.
2291 Returns 0 if SECTION doesn't exist. */
2294 get_section_id (const struct dwarf2_section_info
*section
)
2296 asection
*sectp
= get_section_bfd_section (section
);
2303 /* Return the flags of SECTION.
2304 SECTION (or containing section if this is a virtual section) must exist. */
2307 get_section_flags (const struct dwarf2_section_info
*section
)
2309 asection
*sectp
= get_section_bfd_section (section
);
2311 gdb_assert (sectp
!= NULL
);
2312 return bfd_get_section_flags (sectp
->owner
, sectp
);
2315 /* When loading sections, we look either for uncompressed section or for
2316 compressed section names. */
2319 section_is_p (const char *section_name
,
2320 const struct dwarf2_section_names
*names
)
2322 if (names
->normal
!= NULL
2323 && strcmp (section_name
, names
->normal
) == 0)
2325 if (names
->compressed
!= NULL
2326 && strcmp (section_name
, names
->compressed
) == 0)
2331 /* See declaration. */
2334 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
2335 const dwarf2_debug_sections
&names
)
2337 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2339 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2342 else if (section_is_p (sectp
->name
, &names
.info
))
2344 this->info
.s
.section
= sectp
;
2345 this->info
.size
= bfd_get_section_size (sectp
);
2347 else if (section_is_p (sectp
->name
, &names
.abbrev
))
2349 this->abbrev
.s
.section
= sectp
;
2350 this->abbrev
.size
= bfd_get_section_size (sectp
);
2352 else if (section_is_p (sectp
->name
, &names
.line
))
2354 this->line
.s
.section
= sectp
;
2355 this->line
.size
= bfd_get_section_size (sectp
);
2357 else if (section_is_p (sectp
->name
, &names
.loc
))
2359 this->loc
.s
.section
= sectp
;
2360 this->loc
.size
= bfd_get_section_size (sectp
);
2362 else if (section_is_p (sectp
->name
, &names
.loclists
))
2364 this->loclists
.s
.section
= sectp
;
2365 this->loclists
.size
= bfd_get_section_size (sectp
);
2367 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2369 this->macinfo
.s
.section
= sectp
;
2370 this->macinfo
.size
= bfd_get_section_size (sectp
);
2372 else if (section_is_p (sectp
->name
, &names
.macro
))
2374 this->macro
.s
.section
= sectp
;
2375 this->macro
.size
= bfd_get_section_size (sectp
);
2377 else if (section_is_p (sectp
->name
, &names
.str
))
2379 this->str
.s
.section
= sectp
;
2380 this->str
.size
= bfd_get_section_size (sectp
);
2382 else if (section_is_p (sectp
->name
, &names
.line_str
))
2384 this->line_str
.s
.section
= sectp
;
2385 this->line_str
.size
= bfd_get_section_size (sectp
);
2387 else if (section_is_p (sectp
->name
, &names
.addr
))
2389 this->addr
.s
.section
= sectp
;
2390 this->addr
.size
= bfd_get_section_size (sectp
);
2392 else if (section_is_p (sectp
->name
, &names
.frame
))
2394 this->frame
.s
.section
= sectp
;
2395 this->frame
.size
= bfd_get_section_size (sectp
);
2397 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2399 this->eh_frame
.s
.section
= sectp
;
2400 this->eh_frame
.size
= bfd_get_section_size (sectp
);
2402 else if (section_is_p (sectp
->name
, &names
.ranges
))
2404 this->ranges
.s
.section
= sectp
;
2405 this->ranges
.size
= bfd_get_section_size (sectp
);
2407 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2409 this->rnglists
.s
.section
= sectp
;
2410 this->rnglists
.size
= bfd_get_section_size (sectp
);
2412 else if (section_is_p (sectp
->name
, &names
.types
))
2414 struct dwarf2_section_info type_section
;
2416 memset (&type_section
, 0, sizeof (type_section
));
2417 type_section
.s
.section
= sectp
;
2418 type_section
.size
= bfd_get_section_size (sectp
);
2420 VEC_safe_push (dwarf2_section_info_def
, this->types
,
2423 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2425 this->gdb_index
.s
.section
= sectp
;
2426 this->gdb_index
.size
= bfd_get_section_size (sectp
);
2428 else if (section_is_p (sectp
->name
, &names
.debug_names
))
2430 this->debug_names
.s
.section
= sectp
;
2431 this->debug_names
.size
= bfd_get_section_size (sectp
);
2433 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
2435 this->debug_aranges
.s
.section
= sectp
;
2436 this->debug_aranges
.size
= bfd_get_section_size (sectp
);
2439 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2440 && bfd_section_vma (abfd
, sectp
) == 0)
2441 this->has_section_at_zero
= true;
2444 /* A helper function that decides whether a section is empty,
2448 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2450 if (section
->is_virtual
)
2451 return section
->size
== 0;
2452 return section
->s
.section
== NULL
|| section
->size
== 0;
2455 /* See dwarf2read.h. */
2458 dwarf2_read_section (struct objfile
*objfile
, dwarf2_section_info
*info
)
2462 gdb_byte
*buf
, *retbuf
;
2466 info
->buffer
= NULL
;
2469 if (dwarf2_section_empty_p (info
))
2472 sectp
= get_section_bfd_section (info
);
2474 /* If this is a virtual section we need to read in the real one first. */
2475 if (info
->is_virtual
)
2477 struct dwarf2_section_info
*containing_section
=
2478 get_containing_section (info
);
2480 gdb_assert (sectp
!= NULL
);
2481 if ((sectp
->flags
& SEC_RELOC
) != 0)
2483 error (_("Dwarf Error: DWP format V2 with relocations is not"
2484 " supported in section %s [in module %s]"),
2485 get_section_name (info
), get_section_file_name (info
));
2487 dwarf2_read_section (objfile
, containing_section
);
2488 /* Other code should have already caught virtual sections that don't
2490 gdb_assert (info
->virtual_offset
+ info
->size
2491 <= containing_section
->size
);
2492 /* If the real section is empty or there was a problem reading the
2493 section we shouldn't get here. */
2494 gdb_assert (containing_section
->buffer
!= NULL
);
2495 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2499 /* If the section has relocations, we must read it ourselves.
2500 Otherwise we attach it to the BFD. */
2501 if ((sectp
->flags
& SEC_RELOC
) == 0)
2503 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2507 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2510 /* When debugging .o files, we may need to apply relocations; see
2511 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2512 We never compress sections in .o files, so we only need to
2513 try this when the section is not compressed. */
2514 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2517 info
->buffer
= retbuf
;
2521 abfd
= get_section_bfd_owner (info
);
2522 gdb_assert (abfd
!= NULL
);
2524 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2525 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2527 error (_("Dwarf Error: Can't read DWARF data"
2528 " in section %s [in module %s]"),
2529 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2533 /* A helper function that returns the size of a section in a safe way.
2534 If you are positive that the section has been read before using the
2535 size, then it is safe to refer to the dwarf2_section_info object's
2536 "size" field directly. In other cases, you must call this
2537 function, because for compressed sections the size field is not set
2538 correctly until the section has been read. */
2540 static bfd_size_type
2541 dwarf2_section_size (struct objfile
*objfile
,
2542 struct dwarf2_section_info
*info
)
2545 dwarf2_read_section (objfile
, info
);
2549 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2553 dwarf2_get_section_info (struct objfile
*objfile
,
2554 enum dwarf2_section_enum sect
,
2555 asection
**sectp
, const gdb_byte
**bufp
,
2556 bfd_size_type
*sizep
)
2558 struct dwarf2_per_objfile
*data
2559 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
2560 dwarf2_objfile_data_key
);
2561 struct dwarf2_section_info
*info
;
2563 /* We may see an objfile without any DWARF, in which case we just
2574 case DWARF2_DEBUG_FRAME
:
2575 info
= &data
->frame
;
2577 case DWARF2_EH_FRAME
:
2578 info
= &data
->eh_frame
;
2581 gdb_assert_not_reached ("unexpected section");
2584 dwarf2_read_section (objfile
, info
);
2586 *sectp
= get_section_bfd_section (info
);
2587 *bufp
= info
->buffer
;
2588 *sizep
= info
->size
;
2591 /* A helper function to find the sections for a .dwz file. */
2594 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2596 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2598 /* Note that we only support the standard ELF names, because .dwz
2599 is ELF-only (at the time of writing). */
2600 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2602 dwz_file
->abbrev
.s
.section
= sectp
;
2603 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2605 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2607 dwz_file
->info
.s
.section
= sectp
;
2608 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2610 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2612 dwz_file
->str
.s
.section
= sectp
;
2613 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2615 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2617 dwz_file
->line
.s
.section
= sectp
;
2618 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2620 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2622 dwz_file
->macro
.s
.section
= sectp
;
2623 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2625 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2627 dwz_file
->gdb_index
.s
.section
= sectp
;
2628 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2630 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2632 dwz_file
->debug_names
.s
.section
= sectp
;
2633 dwz_file
->debug_names
.size
= bfd_get_section_size (sectp
);
2637 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2638 there is no .gnu_debugaltlink section in the file. Error if there
2639 is such a section but the file cannot be found. */
2641 static struct dwz_file
*
2642 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2644 const char *filename
;
2645 bfd_size_type buildid_len_arg
;
2649 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2650 return dwarf2_per_objfile
->dwz_file
.get ();
2652 bfd_set_error (bfd_error_no_error
);
2653 gdb::unique_xmalloc_ptr
<char> data
2654 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2655 &buildid_len_arg
, &buildid
));
2658 if (bfd_get_error () == bfd_error_no_error
)
2660 error (_("could not read '.gnu_debugaltlink' section: %s"),
2661 bfd_errmsg (bfd_get_error ()));
2664 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2666 buildid_len
= (size_t) buildid_len_arg
;
2668 filename
= data
.get ();
2670 std::string abs_storage
;
2671 if (!IS_ABSOLUTE_PATH (filename
))
2673 gdb::unique_xmalloc_ptr
<char> abs
2674 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2676 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2677 filename
= abs_storage
.c_str ();
2680 /* First try the file name given in the section. If that doesn't
2681 work, try to use the build-id instead. */
2682 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2683 if (dwz_bfd
!= NULL
)
2685 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2689 if (dwz_bfd
== NULL
)
2690 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2692 if (dwz_bfd
== NULL
)
2693 error (_("could not find '.gnu_debugaltlink' file for %s"),
2694 objfile_name (dwarf2_per_objfile
->objfile
));
2696 std::unique_ptr
<struct dwz_file
> result
2697 (new struct dwz_file (std::move (dwz_bfd
)));
2699 bfd_map_over_sections (result
->dwz_bfd
.get (), locate_dwz_sections
,
2702 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
,
2703 result
->dwz_bfd
.get ());
2704 dwarf2_per_objfile
->dwz_file
= std::move (result
);
2705 return dwarf2_per_objfile
->dwz_file
.get ();
2708 /* DWARF quick_symbols_functions support. */
2710 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2711 unique line tables, so we maintain a separate table of all .debug_line
2712 derived entries to support the sharing.
2713 All the quick functions need is the list of file names. We discard the
2714 line_header when we're done and don't need to record it here. */
2715 struct quick_file_names
2717 /* The data used to construct the hash key. */
2718 struct stmt_list_hash hash
;
2720 /* The number of entries in file_names, real_names. */
2721 unsigned int num_file_names
;
2723 /* The file names from the line table, after being run through
2725 const char **file_names
;
2727 /* The file names from the line table after being run through
2728 gdb_realpath. These are computed lazily. */
2729 const char **real_names
;
2732 /* When using the index (and thus not using psymtabs), each CU has an
2733 object of this type. This is used to hold information needed by
2734 the various "quick" methods. */
2735 struct dwarf2_per_cu_quick_data
2737 /* The file table. This can be NULL if there was no file table
2738 or it's currently not read in.
2739 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2740 struct quick_file_names
*file_names
;
2742 /* The corresponding symbol table. This is NULL if symbols for this
2743 CU have not yet been read. */
2744 struct compunit_symtab
*compunit_symtab
;
2746 /* A temporary mark bit used when iterating over all CUs in
2747 expand_symtabs_matching. */
2748 unsigned int mark
: 1;
2750 /* True if we've tried to read the file table and found there isn't one.
2751 There will be no point in trying to read it again next time. */
2752 unsigned int no_file_data
: 1;
2755 /* Utility hash function for a stmt_list_hash. */
2758 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2762 if (stmt_list_hash
->dwo_unit
!= NULL
)
2763 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2764 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2768 /* Utility equality function for a stmt_list_hash. */
2771 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2772 const struct stmt_list_hash
*rhs
)
2774 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2776 if (lhs
->dwo_unit
!= NULL
2777 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2780 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2783 /* Hash function for a quick_file_names. */
2786 hash_file_name_entry (const void *e
)
2788 const struct quick_file_names
*file_data
2789 = (const struct quick_file_names
*) e
;
2791 return hash_stmt_list_entry (&file_data
->hash
);
2794 /* Equality function for a quick_file_names. */
2797 eq_file_name_entry (const void *a
, const void *b
)
2799 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2800 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2802 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2805 /* Delete function for a quick_file_names. */
2808 delete_file_name_entry (void *e
)
2810 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2813 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2815 xfree ((void*) file_data
->file_names
[i
]);
2816 if (file_data
->real_names
)
2817 xfree ((void*) file_data
->real_names
[i
]);
2820 /* The space for the struct itself lives on objfile_obstack,
2821 so we don't free it here. */
2824 /* Create a quick_file_names hash table. */
2827 create_quick_file_names_table (unsigned int nr_initial_entries
)
2829 return htab_create_alloc (nr_initial_entries
,
2830 hash_file_name_entry
, eq_file_name_entry
,
2831 delete_file_name_entry
, xcalloc
, xfree
);
2834 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2835 have to be created afterwards. You should call age_cached_comp_units after
2836 processing PER_CU->CU. dw2_setup must have been already called. */
2839 load_cu (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2841 if (per_cu
->is_debug_types
)
2842 load_full_type_unit (per_cu
);
2844 load_full_comp_unit (per_cu
, skip_partial
, language_minimal
);
2846 if (per_cu
->cu
== NULL
)
2847 return; /* Dummy CU. */
2849 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2852 /* Read in the symbols for PER_CU. */
2855 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2857 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2859 /* Skip type_unit_groups, reading the type units they contain
2860 is handled elsewhere. */
2861 if (IS_TYPE_UNIT_GROUP (per_cu
))
2864 /* The destructor of dwarf2_queue_guard frees any entries left on
2865 the queue. After this point we're guaranteed to leave this function
2866 with the dwarf queue empty. */
2867 dwarf2_queue_guard q_guard
;
2869 if (dwarf2_per_objfile
->using_index
2870 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2871 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2873 queue_comp_unit (per_cu
, language_minimal
);
2874 load_cu (per_cu
, skip_partial
);
2876 /* If we just loaded a CU from a DWO, and we're working with an index
2877 that may badly handle TUs, load all the TUs in that DWO as well.
2878 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2879 if (!per_cu
->is_debug_types
2880 && per_cu
->cu
!= NULL
2881 && per_cu
->cu
->dwo_unit
!= NULL
2882 && dwarf2_per_objfile
->index_table
!= NULL
2883 && dwarf2_per_objfile
->index_table
->version
<= 7
2884 /* DWP files aren't supported yet. */
2885 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2886 queue_and_load_all_dwo_tus (per_cu
);
2889 process_queue (dwarf2_per_objfile
);
2891 /* Age the cache, releasing compilation units that have not
2892 been used recently. */
2893 age_cached_comp_units (dwarf2_per_objfile
);
2896 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2897 the objfile from which this CU came. Returns the resulting symbol
2900 static struct compunit_symtab
*
2901 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2903 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2905 gdb_assert (dwarf2_per_objfile
->using_index
);
2906 if (!per_cu
->v
.quick
->compunit_symtab
)
2908 free_cached_comp_units
freer (dwarf2_per_objfile
);
2909 scoped_restore decrementer
= increment_reading_symtab ();
2910 dw2_do_instantiate_symtab (per_cu
, skip_partial
);
2911 process_cu_includes (dwarf2_per_objfile
);
2914 return per_cu
->v
.quick
->compunit_symtab
;
2917 /* See declaration. */
2919 dwarf2_per_cu_data
*
2920 dwarf2_per_objfile::get_cutu (int index
)
2922 if (index
>= this->all_comp_units
.size ())
2924 index
-= this->all_comp_units
.size ();
2925 gdb_assert (index
< this->all_type_units
.size ());
2926 return &this->all_type_units
[index
]->per_cu
;
2929 return this->all_comp_units
[index
];
2932 /* See declaration. */
2934 dwarf2_per_cu_data
*
2935 dwarf2_per_objfile::get_cu (int index
)
2937 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2939 return this->all_comp_units
[index
];
2942 /* See declaration. */
2945 dwarf2_per_objfile::get_tu (int index
)
2947 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2949 return this->all_type_units
[index
];
2952 /* Return a new dwarf2_per_cu_data allocated on OBJFILE's
2953 objfile_obstack, and constructed with the specified field
2956 static dwarf2_per_cu_data
*
2957 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2958 struct dwarf2_section_info
*section
,
2960 sect_offset sect_off
, ULONGEST length
)
2962 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2963 dwarf2_per_cu_data
*the_cu
2964 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2965 struct dwarf2_per_cu_data
);
2966 the_cu
->sect_off
= sect_off
;
2967 the_cu
->length
= length
;
2968 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2969 the_cu
->section
= section
;
2970 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2971 struct dwarf2_per_cu_quick_data
);
2972 the_cu
->is_dwz
= is_dwz
;
2976 /* A helper for create_cus_from_index that handles a given list of
2980 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2981 const gdb_byte
*cu_list
, offset_type n_elements
,
2982 struct dwarf2_section_info
*section
,
2985 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2987 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2989 sect_offset sect_off
2990 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2991 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2994 dwarf2_per_cu_data
*per_cu
2995 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
2997 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
3001 /* Read the CU list from the mapped index, and use it to create all
3002 the CU objects for this objfile. */
3005 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3006 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
3007 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
3009 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
3010 dwarf2_per_objfile
->all_comp_units
.reserve
3011 ((cu_list_elements
+ dwz_elements
) / 2);
3013 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3014 &dwarf2_per_objfile
->info
, 0);
3016 if (dwz_elements
== 0)
3019 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3020 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
3024 /* Create the signatured type hash table from the index. */
3027 create_signatured_type_table_from_index
3028 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3029 struct dwarf2_section_info
*section
,
3030 const gdb_byte
*bytes
,
3031 offset_type elements
)
3033 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3035 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3036 dwarf2_per_objfile
->all_type_units
.reserve (elements
/ 3);
3038 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3040 for (offset_type i
= 0; i
< elements
; i
+= 3)
3042 struct signatured_type
*sig_type
;
3045 cu_offset type_offset_in_tu
;
3047 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3048 sect_offset sect_off
3049 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
3051 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
3053 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
3056 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3057 struct signatured_type
);
3058 sig_type
->signature
= signature
;
3059 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3060 sig_type
->per_cu
.is_debug_types
= 1;
3061 sig_type
->per_cu
.section
= section
;
3062 sig_type
->per_cu
.sect_off
= sect_off
;
3063 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3064 sig_type
->per_cu
.v
.quick
3065 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3066 struct dwarf2_per_cu_quick_data
);
3068 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3071 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3074 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3077 /* Create the signatured type hash table from .debug_names. */
3080 create_signatured_type_table_from_debug_names
3081 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3082 const mapped_debug_names
&map
,
3083 struct dwarf2_section_info
*section
,
3084 struct dwarf2_section_info
*abbrev_section
)
3086 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3088 dwarf2_read_section (objfile
, section
);
3089 dwarf2_read_section (objfile
, abbrev_section
);
3091 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3092 dwarf2_per_objfile
->all_type_units
.reserve (map
.tu_count
);
3094 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3096 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
3098 struct signatured_type
*sig_type
;
3101 sect_offset sect_off
3102 = (sect_offset
) (extract_unsigned_integer
3103 (map
.tu_table_reordered
+ i
* map
.offset_size
,
3105 map
.dwarf5_byte_order
));
3107 comp_unit_head cu_header
;
3108 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
3110 section
->buffer
+ to_underlying (sect_off
),
3113 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3114 struct signatured_type
);
3115 sig_type
->signature
= cu_header
.signature
;
3116 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
3117 sig_type
->per_cu
.is_debug_types
= 1;
3118 sig_type
->per_cu
.section
= section
;
3119 sig_type
->per_cu
.sect_off
= sect_off
;
3120 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3121 sig_type
->per_cu
.v
.quick
3122 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3123 struct dwarf2_per_cu_quick_data
);
3125 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3128 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3131 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3134 /* Read the address map data from the mapped index, and use it to
3135 populate the objfile's psymtabs_addrmap. */
3138 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3139 struct mapped_index
*index
)
3141 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3142 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3143 const gdb_byte
*iter
, *end
;
3144 struct addrmap
*mutable_map
;
3147 auto_obstack temp_obstack
;
3149 mutable_map
= addrmap_create_mutable (&temp_obstack
);
3151 iter
= index
->address_table
.data ();
3152 end
= iter
+ index
->address_table
.size ();
3154 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3158 ULONGEST hi
, lo
, cu_index
;
3159 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3161 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3163 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
3168 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
3169 hex_string (lo
), hex_string (hi
));
3173 if (cu_index
>= dwarf2_per_objfile
->all_comp_units
.size ())
3175 complaint (_(".gdb_index address table has invalid CU number %u"),
3176 (unsigned) cu_index
);
3180 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
3181 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
3182 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
3183 dwarf2_per_objfile
->get_cu (cu_index
));
3186 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3187 &objfile
->objfile_obstack
);
3190 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
3191 populate the objfile's psymtabs_addrmap. */
3194 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3195 struct dwarf2_section_info
*section
)
3197 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3198 bfd
*abfd
= objfile
->obfd
;
3199 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3200 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
3201 SECT_OFF_TEXT (objfile
));
3203 auto_obstack temp_obstack
;
3204 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
3206 std::unordered_map
<sect_offset
,
3207 dwarf2_per_cu_data
*,
3208 gdb::hash_enum
<sect_offset
>>
3209 debug_info_offset_to_per_cu
;
3210 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3212 const auto insertpair
3213 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
3214 if (!insertpair
.second
)
3216 warning (_("Section .debug_aranges in %s has duplicate "
3217 "debug_info_offset %s, ignoring .debug_aranges."),
3218 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
3223 dwarf2_read_section (objfile
, section
);
3225 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
3227 const gdb_byte
*addr
= section
->buffer
;
3229 while (addr
< section
->buffer
+ section
->size
)
3231 const gdb_byte
*const entry_addr
= addr
;
3232 unsigned int bytes_read
;
3234 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
3238 const gdb_byte
*const entry_end
= addr
+ entry_length
;
3239 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
3240 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
3241 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
3243 warning (_("Section .debug_aranges in %s entry at offset %zu "
3244 "length %s exceeds section length %s, "
3245 "ignoring .debug_aranges."),
3246 objfile_name (objfile
), entry_addr
- section
->buffer
,
3247 plongest (bytes_read
+ entry_length
),
3248 pulongest (section
->size
));
3252 /* The version number. */
3253 const uint16_t version
= read_2_bytes (abfd
, addr
);
3257 warning (_("Section .debug_aranges in %s entry at offset %zu "
3258 "has unsupported version %d, ignoring .debug_aranges."),
3259 objfile_name (objfile
), entry_addr
- section
->buffer
,
3264 const uint64_t debug_info_offset
3265 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
3266 addr
+= offset_size
;
3267 const auto per_cu_it
3268 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
3269 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
3271 warning (_("Section .debug_aranges in %s entry at offset %zu "
3272 "debug_info_offset %s does not exists, "
3273 "ignoring .debug_aranges."),
3274 objfile_name (objfile
), entry_addr
- section
->buffer
,
3275 pulongest (debug_info_offset
));
3278 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
3280 const uint8_t address_size
= *addr
++;
3281 if (address_size
< 1 || address_size
> 8)
3283 warning (_("Section .debug_aranges in %s entry at offset %zu "
3284 "address_size %u is invalid, ignoring .debug_aranges."),
3285 objfile_name (objfile
), entry_addr
- section
->buffer
,
3290 const uint8_t segment_selector_size
= *addr
++;
3291 if (segment_selector_size
!= 0)
3293 warning (_("Section .debug_aranges in %s entry at offset %zu "
3294 "segment_selector_size %u is not supported, "
3295 "ignoring .debug_aranges."),
3296 objfile_name (objfile
), entry_addr
- section
->buffer
,
3297 segment_selector_size
);
3301 /* Must pad to an alignment boundary that is twice the address
3302 size. It is undocumented by the DWARF standard but GCC does
3304 for (size_t padding
= ((-(addr
- section
->buffer
))
3305 & (2 * address_size
- 1));
3306 padding
> 0; padding
--)
3309 warning (_("Section .debug_aranges in %s entry at offset %zu "
3310 "padding is not zero, ignoring .debug_aranges."),
3311 objfile_name (objfile
), entry_addr
- section
->buffer
);
3317 if (addr
+ 2 * address_size
> entry_end
)
3319 warning (_("Section .debug_aranges in %s entry at offset %zu "
3320 "address list is not properly terminated, "
3321 "ignoring .debug_aranges."),
3322 objfile_name (objfile
), entry_addr
- section
->buffer
);
3325 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
3327 addr
+= address_size
;
3328 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
3330 addr
+= address_size
;
3331 if (start
== 0 && length
== 0)
3333 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3335 /* Symbol was eliminated due to a COMDAT group. */
3338 ULONGEST end
= start
+ length
;
3339 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
);
3340 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
);
3341 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
3345 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3346 &objfile
->objfile_obstack
);
3349 /* Find a slot in the mapped index INDEX for the object named NAME.
3350 If NAME is found, set *VEC_OUT to point to the CU vector in the
3351 constant pool and return true. If NAME cannot be found, return
3355 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3356 offset_type
**vec_out
)
3359 offset_type slot
, step
;
3360 int (*cmp
) (const char *, const char *);
3362 gdb::unique_xmalloc_ptr
<char> without_params
;
3363 if (current_language
->la_language
== language_cplus
3364 || current_language
->la_language
== language_fortran
3365 || current_language
->la_language
== language_d
)
3367 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3370 if (strchr (name
, '(') != NULL
)
3372 without_params
= cp_remove_params (name
);
3374 if (without_params
!= NULL
)
3375 name
= without_params
.get ();
3379 /* Index version 4 did not support case insensitive searches. But the
3380 indices for case insensitive languages are built in lowercase, therefore
3381 simulate our NAME being searched is also lowercased. */
3382 hash
= mapped_index_string_hash ((index
->version
== 4
3383 && case_sensitivity
== case_sensitive_off
3384 ? 5 : index
->version
),
3387 slot
= hash
& (index
->symbol_table
.size () - 1);
3388 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
3389 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3395 const auto &bucket
= index
->symbol_table
[slot
];
3396 if (bucket
.name
== 0 && bucket
.vec
== 0)
3399 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
3400 if (!cmp (name
, str
))
3402 *vec_out
= (offset_type
*) (index
->constant_pool
3403 + MAYBE_SWAP (bucket
.vec
));
3407 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
3411 /* A helper function that reads the .gdb_index from SECTION and fills
3412 in MAP. FILENAME is the name of the file containing the section;
3413 it is used for error reporting. DEPRECATED_OK is true if it is
3414 ok to use deprecated sections.
3416 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3417 out parameters that are filled in with information about the CU and
3418 TU lists in the section.
3420 Returns 1 if all went well, 0 otherwise. */
3423 read_gdb_index_from_section (struct objfile
*objfile
,
3424 const char *filename
,
3426 struct dwarf2_section_info
*section
,
3427 struct mapped_index
*map
,
3428 const gdb_byte
**cu_list
,
3429 offset_type
*cu_list_elements
,
3430 const gdb_byte
**types_list
,
3431 offset_type
*types_list_elements
)
3433 const gdb_byte
*addr
;
3434 offset_type version
;
3435 offset_type
*metadata
;
3438 if (dwarf2_section_empty_p (section
))
3441 /* Older elfutils strip versions could keep the section in the main
3442 executable while splitting it for the separate debug info file. */
3443 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3446 dwarf2_read_section (objfile
, section
);
3448 addr
= section
->buffer
;
3449 /* Version check. */
3450 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3451 /* Versions earlier than 3 emitted every copy of a psymbol. This
3452 causes the index to behave very poorly for certain requests. Version 3
3453 contained incomplete addrmap. So, it seems better to just ignore such
3457 static int warning_printed
= 0;
3458 if (!warning_printed
)
3460 warning (_("Skipping obsolete .gdb_index section in %s."),
3462 warning_printed
= 1;
3466 /* Index version 4 uses a different hash function than index version
3469 Versions earlier than 6 did not emit psymbols for inlined
3470 functions. Using these files will cause GDB not to be able to
3471 set breakpoints on inlined functions by name, so we ignore these
3472 indices unless the user has done
3473 "set use-deprecated-index-sections on". */
3474 if (version
< 6 && !deprecated_ok
)
3476 static int warning_printed
= 0;
3477 if (!warning_printed
)
3480 Skipping deprecated .gdb_index section in %s.\n\
3481 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3482 to use the section anyway."),
3484 warning_printed
= 1;
3488 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3489 of the TU (for symbols coming from TUs),
3490 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3491 Plus gold-generated indices can have duplicate entries for global symbols,
3492 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3493 These are just performance bugs, and we can't distinguish gdb-generated
3494 indices from gold-generated ones, so issue no warning here. */
3496 /* Indexes with higher version than the one supported by GDB may be no
3497 longer backward compatible. */
3501 map
->version
= version
;
3503 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3506 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3507 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3511 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3512 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3513 - MAYBE_SWAP (metadata
[i
]))
3517 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3518 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3520 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3523 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3524 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3526 = gdb::array_view
<mapped_index::symbol_table_slot
>
3527 ((mapped_index::symbol_table_slot
*) symbol_table
,
3528 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3531 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3536 /* Read .gdb_index. If everything went ok, initialize the "quick"
3537 elements of all the CUs and return 1. Otherwise, return 0. */
3540 dwarf2_read_gdb_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
3542 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3543 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3544 struct dwz_file
*dwz
;
3545 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3547 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3548 if (!read_gdb_index_from_section (objfile
, objfile_name (objfile
),
3549 use_deprecated_index_sections
,
3550 &dwarf2_per_objfile
->gdb_index
, map
.get (),
3551 &cu_list
, &cu_list_elements
,
3552 &types_list
, &types_list_elements
))
3555 /* Don't use the index if it's empty. */
3556 if (map
->symbol_table
.empty ())
3559 /* If there is a .dwz file, read it so we can get its CU list as
3561 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3564 struct mapped_index dwz_map
;
3565 const gdb_byte
*dwz_types_ignore
;
3566 offset_type dwz_types_elements_ignore
;
3568 if (!read_gdb_index_from_section (objfile
,
3569 bfd_get_filename (dwz
->dwz_bfd
), 1,
3570 &dwz
->gdb_index
, &dwz_map
,
3571 &dwz_list
, &dwz_list_elements
,
3573 &dwz_types_elements_ignore
))
3575 warning (_("could not read '.gdb_index' section from %s; skipping"),
3576 bfd_get_filename (dwz
->dwz_bfd
));
3581 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3582 dwz_list
, dwz_list_elements
);
3584 if (types_list_elements
)
3586 struct dwarf2_section_info
*section
;
3588 /* We can only handle a single .debug_types when we have an
3590 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3593 section
= VEC_index (dwarf2_section_info_def
,
3594 dwarf2_per_objfile
->types
, 0);
3596 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3597 types_list
, types_list_elements
);
3600 create_addrmap_from_index (dwarf2_per_objfile
, map
.get ());
3602 dwarf2_per_objfile
->index_table
= std::move (map
);
3603 dwarf2_per_objfile
->using_index
= 1;
3604 dwarf2_per_objfile
->quick_file_names_table
=
3605 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
3610 /* die_reader_func for dw2_get_file_names. */
3613 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3614 const gdb_byte
*info_ptr
,
3615 struct die_info
*comp_unit_die
,
3619 struct dwarf2_cu
*cu
= reader
->cu
;
3620 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3621 struct dwarf2_per_objfile
*dwarf2_per_objfile
3622 = cu
->per_cu
->dwarf2_per_objfile
;
3623 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3624 struct dwarf2_per_cu_data
*lh_cu
;
3625 struct attribute
*attr
;
3628 struct quick_file_names
*qfn
;
3630 gdb_assert (! this_cu
->is_debug_types
);
3632 /* Our callers never want to match partial units -- instead they
3633 will match the enclosing full CU. */
3634 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3636 this_cu
->v
.quick
->no_file_data
= 1;
3644 sect_offset line_offset
{};
3646 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3649 struct quick_file_names find_entry
;
3651 line_offset
= (sect_offset
) DW_UNSND (attr
);
3653 /* We may have already read in this line header (TU line header sharing).
3654 If we have we're done. */
3655 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3656 find_entry
.hash
.line_sect_off
= line_offset
;
3657 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3658 &find_entry
, INSERT
);
3661 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3665 lh
= dwarf_decode_line_header (line_offset
, cu
);
3669 lh_cu
->v
.quick
->no_file_data
= 1;
3673 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3674 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3675 qfn
->hash
.line_sect_off
= line_offset
;
3676 gdb_assert (slot
!= NULL
);
3679 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3681 qfn
->num_file_names
= lh
->file_names
.size ();
3683 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->file_names
.size ());
3684 for (i
= 0; i
< lh
->file_names
.size (); ++i
)
3685 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
3686 qfn
->real_names
= NULL
;
3688 lh_cu
->v
.quick
->file_names
= qfn
;
3691 /* A helper for the "quick" functions which attempts to read the line
3692 table for THIS_CU. */
3694 static struct quick_file_names
*
3695 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3697 /* This should never be called for TUs. */
3698 gdb_assert (! this_cu
->is_debug_types
);
3699 /* Nor type unit groups. */
3700 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3702 if (this_cu
->v
.quick
->file_names
!= NULL
)
3703 return this_cu
->v
.quick
->file_names
;
3704 /* If we know there is no line data, no point in looking again. */
3705 if (this_cu
->v
.quick
->no_file_data
)
3708 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3710 if (this_cu
->v
.quick
->no_file_data
)
3712 return this_cu
->v
.quick
->file_names
;
3715 /* A helper for the "quick" functions which computes and caches the
3716 real path for a given file name from the line table. */
3719 dw2_get_real_path (struct objfile
*objfile
,
3720 struct quick_file_names
*qfn
, int index
)
3722 if (qfn
->real_names
== NULL
)
3723 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3724 qfn
->num_file_names
, const char *);
3726 if (qfn
->real_names
[index
] == NULL
)
3727 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3729 return qfn
->real_names
[index
];
3732 static struct symtab
*
3733 dw2_find_last_source_symtab (struct objfile
*objfile
)
3735 struct dwarf2_per_objfile
*dwarf2_per_objfile
3736 = get_dwarf2_per_objfile (objfile
);
3737 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->all_comp_units
.back ();
3738 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
, false);
3743 return compunit_primary_filetab (cust
);
3746 /* Traversal function for dw2_forget_cached_source_info. */
3749 dw2_free_cached_file_names (void **slot
, void *info
)
3751 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3753 if (file_data
->real_names
)
3757 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3759 xfree ((void*) file_data
->real_names
[i
]);
3760 file_data
->real_names
[i
] = NULL
;
3768 dw2_forget_cached_source_info (struct objfile
*objfile
)
3770 struct dwarf2_per_objfile
*dwarf2_per_objfile
3771 = get_dwarf2_per_objfile (objfile
);
3773 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3774 dw2_free_cached_file_names
, NULL
);
3777 /* Helper function for dw2_map_symtabs_matching_filename that expands
3778 the symtabs and calls the iterator. */
3781 dw2_map_expand_apply (struct objfile
*objfile
,
3782 struct dwarf2_per_cu_data
*per_cu
,
3783 const char *name
, const char *real_path
,
3784 gdb::function_view
<bool (symtab
*)> callback
)
3786 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3788 /* Don't visit already-expanded CUs. */
3789 if (per_cu
->v
.quick
->compunit_symtab
)
3792 /* This may expand more than one symtab, and we want to iterate over
3794 dw2_instantiate_symtab (per_cu
, false);
3796 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3797 last_made
, callback
);
3800 /* Implementation of the map_symtabs_matching_filename method. */
3803 dw2_map_symtabs_matching_filename
3804 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3805 gdb::function_view
<bool (symtab
*)> callback
)
3807 const char *name_basename
= lbasename (name
);
3808 struct dwarf2_per_objfile
*dwarf2_per_objfile
3809 = get_dwarf2_per_objfile (objfile
);
3811 /* The rule is CUs specify all the files, including those used by
3812 any TU, so there's no need to scan TUs here. */
3814 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3816 /* We only need to look at symtabs not already expanded. */
3817 if (per_cu
->v
.quick
->compunit_symtab
)
3820 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3821 if (file_data
== NULL
)
3824 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3826 const char *this_name
= file_data
->file_names
[j
];
3827 const char *this_real_name
;
3829 if (compare_filenames_for_search (this_name
, name
))
3831 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3837 /* Before we invoke realpath, which can get expensive when many
3838 files are involved, do a quick comparison of the basenames. */
3839 if (! basenames_may_differ
3840 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3843 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3844 if (compare_filenames_for_search (this_real_name
, name
))
3846 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3852 if (real_path
!= NULL
)
3854 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3855 gdb_assert (IS_ABSOLUTE_PATH (name
));
3856 if (this_real_name
!= NULL
3857 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3859 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3871 /* Struct used to manage iterating over all CUs looking for a symbol. */
3873 struct dw2_symtab_iterator
3875 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3876 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3877 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3878 int want_specific_block
;
3879 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3880 Unused if !WANT_SPECIFIC_BLOCK. */
3882 /* The kind of symbol we're looking for. */
3884 /* The list of CUs from the index entry of the symbol,
3885 or NULL if not found. */
3887 /* The next element in VEC to look at. */
3889 /* The number of elements in VEC, or zero if there is no match. */
3891 /* Have we seen a global version of the symbol?
3892 If so we can ignore all further global instances.
3893 This is to work around gold/15646, inefficient gold-generated
3898 /* Initialize the index symtab iterator ITER.
3899 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3900 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3903 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3904 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3905 int want_specific_block
,
3910 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3911 iter
->want_specific_block
= want_specific_block
;
3912 iter
->block_index
= block_index
;
3913 iter
->domain
= domain
;
3915 iter
->global_seen
= 0;
3917 mapped_index
*index
= dwarf2_per_objfile
->index_table
.get ();
3919 /* index is NULL if OBJF_READNOW. */
3920 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3921 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3929 /* Return the next matching CU or NULL if there are no more. */
3931 static struct dwarf2_per_cu_data
*
3932 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3934 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3936 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3938 offset_type cu_index_and_attrs
=
3939 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3940 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3941 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3942 /* This value is only valid for index versions >= 7. */
3943 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3944 gdb_index_symbol_kind symbol_kind
=
3945 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3946 /* Only check the symbol attributes if they're present.
3947 Indices prior to version 7 don't record them,
3948 and indices >= 7 may elide them for certain symbols
3949 (gold does this). */
3951 (dwarf2_per_objfile
->index_table
->version
>= 7
3952 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3954 /* Don't crash on bad data. */
3955 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
3956 + dwarf2_per_objfile
->all_type_units
.size ()))
3958 complaint (_(".gdb_index entry has bad CU index"
3960 objfile_name (dwarf2_per_objfile
->objfile
));
3964 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
3966 /* Skip if already read in. */
3967 if (per_cu
->v
.quick
->compunit_symtab
)
3970 /* Check static vs global. */
3973 if (iter
->want_specific_block
3974 && want_static
!= is_static
)
3976 /* Work around gold/15646. */
3977 if (!is_static
&& iter
->global_seen
)
3980 iter
->global_seen
= 1;
3983 /* Only check the symbol's kind if it has one. */
3986 switch (iter
->domain
)
3989 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3990 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3991 /* Some types are also in VAR_DOMAIN. */
3992 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3996 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4000 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4015 static struct compunit_symtab
*
4016 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
4017 const char *name
, domain_enum domain
)
4019 struct compunit_symtab
*stab_best
= NULL
;
4020 struct dwarf2_per_objfile
*dwarf2_per_objfile
4021 = get_dwarf2_per_objfile (objfile
);
4023 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
4025 struct dw2_symtab_iterator iter
;
4026 struct dwarf2_per_cu_data
*per_cu
;
4028 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 1, block_index
, domain
, name
);
4030 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4032 struct symbol
*sym
, *with_opaque
= NULL
;
4033 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
4034 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
4035 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
4037 sym
= block_find_symbol (block
, name
, domain
,
4038 block_find_non_opaque_type_preferred
,
4041 /* Some caution must be observed with overloaded functions
4042 and methods, since the index will not contain any overload
4043 information (but NAME might contain it). */
4046 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
4048 if (with_opaque
!= NULL
4049 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
4052 /* Keep looking through other CUs. */
4059 dw2_print_stats (struct objfile
*objfile
)
4061 struct dwarf2_per_objfile
*dwarf2_per_objfile
4062 = get_dwarf2_per_objfile (objfile
);
4063 int total
= (dwarf2_per_objfile
->all_comp_units
.size ()
4064 + dwarf2_per_objfile
->all_type_units
.size ());
4067 for (int i
= 0; i
< total
; ++i
)
4069 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4071 if (!per_cu
->v
.quick
->compunit_symtab
)
4074 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
4075 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
4078 /* This dumps minimal information about the index.
4079 It is called via "mt print objfiles".
4080 One use is to verify .gdb_index has been loaded by the
4081 gdb.dwarf2/gdb-index.exp testcase. */
4084 dw2_dump (struct objfile
*objfile
)
4086 struct dwarf2_per_objfile
*dwarf2_per_objfile
4087 = get_dwarf2_per_objfile (objfile
);
4089 gdb_assert (dwarf2_per_objfile
->using_index
);
4090 printf_filtered (".gdb_index:");
4091 if (dwarf2_per_objfile
->index_table
!= NULL
)
4093 printf_filtered (" version %d\n",
4094 dwarf2_per_objfile
->index_table
->version
);
4097 printf_filtered (" faked for \"readnow\"\n");
4098 printf_filtered ("\n");
4102 dw2_relocate (struct objfile
*objfile
,
4103 const struct section_offsets
*new_offsets
,
4104 const struct section_offsets
*delta
)
4106 /* There's nothing to relocate here. */
4110 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
4111 const char *func_name
)
4113 struct dwarf2_per_objfile
*dwarf2_per_objfile
4114 = get_dwarf2_per_objfile (objfile
);
4116 struct dw2_symtab_iterator iter
;
4117 struct dwarf2_per_cu_data
*per_cu
;
4119 /* Note: It doesn't matter what we pass for block_index here. */
4120 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
4123 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4124 dw2_instantiate_symtab (per_cu
, false);
4129 dw2_expand_all_symtabs (struct objfile
*objfile
)
4131 struct dwarf2_per_objfile
*dwarf2_per_objfile
4132 = get_dwarf2_per_objfile (objfile
);
4133 int total_units
= (dwarf2_per_objfile
->all_comp_units
.size ()
4134 + dwarf2_per_objfile
->all_type_units
.size ());
4136 for (int i
= 0; i
< total_units
; ++i
)
4138 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4140 /* We don't want to directly expand a partial CU, because if we
4141 read it with the wrong language, then assertion failures can
4142 be triggered later on. See PR symtab/23010. So, tell
4143 dw2_instantiate_symtab to skip partial CUs -- any important
4144 partial CU will be read via DW_TAG_imported_unit anyway. */
4145 dw2_instantiate_symtab (per_cu
, true);
4150 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
4151 const char *fullname
)
4153 struct dwarf2_per_objfile
*dwarf2_per_objfile
4154 = get_dwarf2_per_objfile (objfile
);
4156 /* We don't need to consider type units here.
4157 This is only called for examining code, e.g. expand_line_sal.
4158 There can be an order of magnitude (or more) more type units
4159 than comp units, and we avoid them if we can. */
4161 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4163 /* We only need to look at symtabs not already expanded. */
4164 if (per_cu
->v
.quick
->compunit_symtab
)
4167 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4168 if (file_data
== NULL
)
4171 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4173 const char *this_fullname
= file_data
->file_names
[j
];
4175 if (filename_cmp (this_fullname
, fullname
) == 0)
4177 dw2_instantiate_symtab (per_cu
, false);
4185 dw2_map_matching_symbols (struct objfile
*objfile
,
4186 const char * name
, domain_enum domain
,
4188 int (*callback
) (struct block
*,
4189 struct symbol
*, void *),
4190 void *data
, symbol_name_match_type match
,
4191 symbol_compare_ftype
*ordered_compare
)
4193 /* Currently unimplemented; used for Ada. The function can be called if the
4194 current language is Ada for a non-Ada objfile using GNU index. As Ada
4195 does not look for non-Ada symbols this function should just return. */
4198 /* Symbol name matcher for .gdb_index names.
4200 Symbol names in .gdb_index have a few particularities:
4202 - There's no indication of which is the language of each symbol.
4204 Since each language has its own symbol name matching algorithm,
4205 and we don't know which language is the right one, we must match
4206 each symbol against all languages. This would be a potential
4207 performance problem if it were not mitigated by the
4208 mapped_index::name_components lookup table, which significantly
4209 reduces the number of times we need to call into this matcher,
4210 making it a non-issue.
4212 - Symbol names in the index have no overload (parameter)
4213 information. I.e., in C++, "foo(int)" and "foo(long)" both
4214 appear as "foo" in the index, for example.
4216 This means that the lookup names passed to the symbol name
4217 matcher functions must have no parameter information either
4218 because (e.g.) symbol search name "foo" does not match
4219 lookup-name "foo(int)" [while swapping search name for lookup
4222 class gdb_index_symbol_name_matcher
4225 /* Prepares the vector of comparison functions for LOOKUP_NAME. */
4226 gdb_index_symbol_name_matcher (const lookup_name_info
&lookup_name
);
4228 /* Walk all the matcher routines and match SYMBOL_NAME against them.
4229 Returns true if any matcher matches. */
4230 bool matches (const char *symbol_name
);
4233 /* A reference to the lookup name we're matching against. */
4234 const lookup_name_info
&m_lookup_name
;
4236 /* A vector holding all the different symbol name matchers, for all
4238 std::vector
<symbol_name_matcher_ftype
*> m_symbol_name_matcher_funcs
;
4241 gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher
4242 (const lookup_name_info
&lookup_name
)
4243 : m_lookup_name (lookup_name
)
4245 /* Prepare the vector of comparison functions upfront, to avoid
4246 doing the same work for each symbol. Care is taken to avoid
4247 matching with the same matcher more than once if/when multiple
4248 languages use the same matcher function. */
4249 auto &matchers
= m_symbol_name_matcher_funcs
;
4250 matchers
.reserve (nr_languages
);
4252 matchers
.push_back (default_symbol_name_matcher
);
4254 for (int i
= 0; i
< nr_languages
; i
++)
4256 const language_defn
*lang
= language_def ((enum language
) i
);
4257 symbol_name_matcher_ftype
*name_matcher
4258 = get_symbol_name_matcher (lang
, m_lookup_name
);
4260 /* Don't insert the same comparison routine more than once.
4261 Note that we do this linear walk instead of a seemingly
4262 cheaper sorted insert, or use a std::set or something like
4263 that, because relative order of function addresses is not
4264 stable. This is not a problem in practice because the number
4265 of supported languages is low, and the cost here is tiny
4266 compared to the number of searches we'll do afterwards using
4268 if (name_matcher
!= default_symbol_name_matcher
4269 && (std::find (matchers
.begin (), matchers
.end (), name_matcher
)
4270 == matchers
.end ()))
4271 matchers
.push_back (name_matcher
);
4276 gdb_index_symbol_name_matcher::matches (const char *symbol_name
)
4278 for (auto matches_name
: m_symbol_name_matcher_funcs
)
4279 if (matches_name (symbol_name
, m_lookup_name
, NULL
))
4285 /* Starting from a search name, return the string that finds the upper
4286 bound of all strings that start with SEARCH_NAME in a sorted name
4287 list. Returns the empty string to indicate that the upper bound is
4288 the end of the list. */
4291 make_sort_after_prefix_name (const char *search_name
)
4293 /* When looking to complete "func", we find the upper bound of all
4294 symbols that start with "func" by looking for where we'd insert
4295 the closest string that would follow "func" in lexicographical
4296 order. Usually, that's "func"-with-last-character-incremented,
4297 i.e. "fund". Mind non-ASCII characters, though. Usually those
4298 will be UTF-8 multi-byte sequences, but we can't be certain.
4299 Especially mind the 0xff character, which is a valid character in
4300 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
4301 rule out compilers allowing it in identifiers. Note that
4302 conveniently, strcmp/strcasecmp are specified to compare
4303 characters interpreted as unsigned char. So what we do is treat
4304 the whole string as a base 256 number composed of a sequence of
4305 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
4306 to 0, and carries 1 to the following more-significant position.
4307 If the very first character in SEARCH_NAME ends up incremented
4308 and carries/overflows, then the upper bound is the end of the
4309 list. The string after the empty string is also the empty
4312 Some examples of this operation:
4314 SEARCH_NAME => "+1" RESULT
4318 "\xff" "a" "\xff" => "\xff" "b"
4323 Then, with these symbols for example:
4329 completing "func" looks for symbols between "func" and
4330 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
4331 which finds "func" and "func1", but not "fund".
4335 funcÿ (Latin1 'ÿ' [0xff])
4339 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
4340 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
4344 ÿÿ (Latin1 'ÿ' [0xff])
4347 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
4348 the end of the list.
4350 std::string after
= search_name
;
4351 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
4353 if (!after
.empty ())
4354 after
.back () = (unsigned char) after
.back () + 1;
4358 /* See declaration. */
4360 std::pair
<std::vector
<name_component
>::const_iterator
,
4361 std::vector
<name_component
>::const_iterator
>
4362 mapped_index_base::find_name_components_bounds
4363 (const lookup_name_info
&lookup_name_without_params
) const
4366 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4369 = lookup_name_without_params
.cplus ().lookup_name ().c_str ();
4371 /* Comparison function object for lower_bound that matches against a
4372 given symbol name. */
4373 auto lookup_compare_lower
= [&] (const name_component
&elem
,
4376 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4377 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4378 return name_cmp (elem_name
, name
) < 0;
4381 /* Comparison function object for upper_bound that matches against a
4382 given symbol name. */
4383 auto lookup_compare_upper
= [&] (const char *name
,
4384 const name_component
&elem
)
4386 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4387 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4388 return name_cmp (name
, elem_name
) < 0;
4391 auto begin
= this->name_components
.begin ();
4392 auto end
= this->name_components
.end ();
4394 /* Find the lower bound. */
4397 if (lookup_name_without_params
.completion_mode () && cplus
[0] == '\0')
4400 return std::lower_bound (begin
, end
, cplus
, lookup_compare_lower
);
4403 /* Find the upper bound. */
4406 if (lookup_name_without_params
.completion_mode ())
4408 /* In completion mode, we want UPPER to point past all
4409 symbols names that have the same prefix. I.e., with
4410 these symbols, and completing "func":
4412 function << lower bound
4414 other_function << upper bound
4416 We find the upper bound by looking for the insertion
4417 point of "func"-with-last-character-incremented,
4419 std::string after
= make_sort_after_prefix_name (cplus
);
4422 return std::lower_bound (lower
, end
, after
.c_str (),
4423 lookup_compare_lower
);
4426 return std::upper_bound (lower
, end
, cplus
, lookup_compare_upper
);
4429 return {lower
, upper
};
4432 /* See declaration. */
4435 mapped_index_base::build_name_components ()
4437 if (!this->name_components
.empty ())
4440 this->name_components_casing
= case_sensitivity
;
4442 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4444 /* The code below only knows how to break apart components of C++
4445 symbol names (and other languages that use '::' as
4446 namespace/module separator). If we add support for wild matching
4447 to some language that uses some other operator (E.g., Ada, Go and
4448 D use '.'), then we'll need to try splitting the symbol name
4449 according to that language too. Note that Ada does support wild
4450 matching, but doesn't currently support .gdb_index. */
4451 auto count
= this->symbol_name_count ();
4452 for (offset_type idx
= 0; idx
< count
; idx
++)
4454 if (this->symbol_name_slot_invalid (idx
))
4457 const char *name
= this->symbol_name_at (idx
);
4459 /* Add each name component to the name component table. */
4460 unsigned int previous_len
= 0;
4461 for (unsigned int current_len
= cp_find_first_component (name
);
4462 name
[current_len
] != '\0';
4463 current_len
+= cp_find_first_component (name
+ current_len
))
4465 gdb_assert (name
[current_len
] == ':');
4466 this->name_components
.push_back ({previous_len
, idx
});
4467 /* Skip the '::'. */
4469 previous_len
= current_len
;
4471 this->name_components
.push_back ({previous_len
, idx
});
4474 /* Sort name_components elements by name. */
4475 auto name_comp_compare
= [&] (const name_component
&left
,
4476 const name_component
&right
)
4478 const char *left_qualified
= this->symbol_name_at (left
.idx
);
4479 const char *right_qualified
= this->symbol_name_at (right
.idx
);
4481 const char *left_name
= left_qualified
+ left
.name_offset
;
4482 const char *right_name
= right_qualified
+ right
.name_offset
;
4484 return name_cmp (left_name
, right_name
) < 0;
4487 std::sort (this->name_components
.begin (),
4488 this->name_components
.end (),
4492 /* Helper for dw2_expand_symtabs_matching that works with a
4493 mapped_index_base instead of the containing objfile. This is split
4494 to a separate function in order to be able to unit test the
4495 name_components matching using a mock mapped_index_base. For each
4496 symbol name that matches, calls MATCH_CALLBACK, passing it the
4497 symbol's index in the mapped_index_base symbol table. */
4500 dw2_expand_symtabs_matching_symbol
4501 (mapped_index_base
&index
,
4502 const lookup_name_info
&lookup_name_in
,
4503 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4504 enum search_domain kind
,
4505 gdb::function_view
<void (offset_type
)> match_callback
)
4507 lookup_name_info lookup_name_without_params
4508 = lookup_name_in
.make_ignore_params ();
4509 gdb_index_symbol_name_matcher lookup_name_matcher
4510 (lookup_name_without_params
);
4512 /* Build the symbol name component sorted vector, if we haven't
4514 index
.build_name_components ();
4516 auto bounds
= index
.find_name_components_bounds (lookup_name_without_params
);
4518 /* Now for each symbol name in range, check to see if we have a name
4519 match, and if so, call the MATCH_CALLBACK callback. */
4521 /* The same symbol may appear more than once in the range though.
4522 E.g., if we're looking for symbols that complete "w", and we have
4523 a symbol named "w1::w2", we'll find the two name components for
4524 that same symbol in the range. To be sure we only call the
4525 callback once per symbol, we first collect the symbol name
4526 indexes that matched in a temporary vector and ignore
4528 std::vector
<offset_type
> matches
;
4529 matches
.reserve (std::distance (bounds
.first
, bounds
.second
));
4531 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4533 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4535 if (!lookup_name_matcher
.matches (qualified
)
4536 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4539 matches
.push_back (bounds
.first
->idx
);
4542 std::sort (matches
.begin (), matches
.end ());
4544 /* Finally call the callback, once per match. */
4546 for (offset_type idx
: matches
)
4550 match_callback (idx
);
4555 /* Above we use a type wider than idx's for 'prev', since 0 and
4556 (offset_type)-1 are both possible values. */
4557 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4562 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4564 /* A mock .gdb_index/.debug_names-like name index table, enough to
4565 exercise dw2_expand_symtabs_matching_symbol, which works with the
4566 mapped_index_base interface. Builds an index from the symbol list
4567 passed as parameter to the constructor. */
4568 class mock_mapped_index
: public mapped_index_base
4571 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4572 : m_symbol_table (symbols
)
4575 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4577 /* Return the number of names in the symbol table. */
4578 size_t symbol_name_count () const override
4580 return m_symbol_table
.size ();
4583 /* Get the name of the symbol at IDX in the symbol table. */
4584 const char *symbol_name_at (offset_type idx
) const override
4586 return m_symbol_table
[idx
];
4590 gdb::array_view
<const char *> m_symbol_table
;
4593 /* Convenience function that converts a NULL pointer to a "<null>"
4594 string, to pass to print routines. */
4597 string_or_null (const char *str
)
4599 return str
!= NULL
? str
: "<null>";
4602 /* Check if a lookup_name_info built from
4603 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4604 index. EXPECTED_LIST is the list of expected matches, in expected
4605 matching order. If no match expected, then an empty list is
4606 specified. Returns true on success. On failure prints a warning
4607 indicating the file:line that failed, and returns false. */
4610 check_match (const char *file
, int line
,
4611 mock_mapped_index
&mock_index
,
4612 const char *name
, symbol_name_match_type match_type
,
4613 bool completion_mode
,
4614 std::initializer_list
<const char *> expected_list
)
4616 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4618 bool matched
= true;
4620 auto mismatch
= [&] (const char *expected_str
,
4623 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4624 "expected=\"%s\", got=\"%s\"\n"),
4626 (match_type
== symbol_name_match_type::FULL
4628 name
, string_or_null (expected_str
), string_or_null (got
));
4632 auto expected_it
= expected_list
.begin ();
4633 auto expected_end
= expected_list
.end ();
4635 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4637 [&] (offset_type idx
)
4639 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4640 const char *expected_str
4641 = expected_it
== expected_end
? NULL
: *expected_it
++;
4643 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4644 mismatch (expected_str
, matched_name
);
4647 const char *expected_str
4648 = expected_it
== expected_end
? NULL
: *expected_it
++;
4649 if (expected_str
!= NULL
)
4650 mismatch (expected_str
, NULL
);
4655 /* The symbols added to the mock mapped_index for testing (in
4657 static const char *test_symbols
[] = {
4666 "ns2::tmpl<int>::foo2",
4667 "(anonymous namespace)::A::B::C",
4669 /* These are used to check that the increment-last-char in the
4670 matching algorithm for completion doesn't match "t1_fund" when
4671 completing "t1_func". */
4677 /* A UTF-8 name with multi-byte sequences to make sure that
4678 cp-name-parser understands this as a single identifier ("função"
4679 is "function" in PT). */
4682 /* \377 (0xff) is Latin1 'ÿ'. */
4685 /* \377 (0xff) is Latin1 'ÿ'. */
4689 /* A name with all sorts of complications. Starts with "z" to make
4690 it easier for the completion tests below. */
4691 #define Z_SYM_NAME \
4692 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4693 "::tuple<(anonymous namespace)::ui*, " \
4694 "std::default_delete<(anonymous namespace)::ui>, void>"
4699 /* Returns true if the mapped_index_base::find_name_component_bounds
4700 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4701 in completion mode. */
4704 check_find_bounds_finds (mapped_index_base
&index
,
4705 const char *search_name
,
4706 gdb::array_view
<const char *> expected_syms
)
4708 lookup_name_info
lookup_name (search_name
,
4709 symbol_name_match_type::FULL
, true);
4711 auto bounds
= index
.find_name_components_bounds (lookup_name
);
4713 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4714 if (distance
!= expected_syms
.size ())
4717 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4719 auto nc_elem
= bounds
.first
+ exp_elem
;
4720 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4721 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4728 /* Test the lower-level mapped_index::find_name_component_bounds
4732 test_mapped_index_find_name_component_bounds ()
4734 mock_mapped_index
mock_index (test_symbols
);
4736 mock_index
.build_name_components ();
4738 /* Test the lower-level mapped_index::find_name_component_bounds
4739 method in completion mode. */
4741 static const char *expected_syms
[] = {
4746 SELF_CHECK (check_find_bounds_finds (mock_index
,
4747 "t1_func", expected_syms
));
4750 /* Check that the increment-last-char in the name matching algorithm
4751 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4753 static const char *expected_syms1
[] = {
4757 SELF_CHECK (check_find_bounds_finds (mock_index
,
4758 "\377", expected_syms1
));
4760 static const char *expected_syms2
[] = {
4763 SELF_CHECK (check_find_bounds_finds (mock_index
,
4764 "\377\377", expected_syms2
));
4768 /* Test dw2_expand_symtabs_matching_symbol. */
4771 test_dw2_expand_symtabs_matching_symbol ()
4773 mock_mapped_index
mock_index (test_symbols
);
4775 /* We let all tests run until the end even if some fails, for debug
4777 bool any_mismatch
= false;
4779 /* Create the expected symbols list (an initializer_list). Needed
4780 because lists have commas, and we need to pass them to CHECK,
4781 which is a macro. */
4782 #define EXPECT(...) { __VA_ARGS__ }
4784 /* Wrapper for check_match that passes down the current
4785 __FILE__/__LINE__. */
4786 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4787 any_mismatch |= !check_match (__FILE__, __LINE__, \
4789 NAME, MATCH_TYPE, COMPLETION_MODE, \
4792 /* Identity checks. */
4793 for (const char *sym
: test_symbols
)
4795 /* Should be able to match all existing symbols. */
4796 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4799 /* Should be able to match all existing symbols with
4801 std::string with_params
= std::string (sym
) + "(int)";
4802 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4805 /* Should be able to match all existing symbols with
4806 parameters and qualifiers. */
4807 with_params
= std::string (sym
) + " ( int ) const";
4808 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4811 /* This should really find sym, but cp-name-parser.y doesn't
4812 know about lvalue/rvalue qualifiers yet. */
4813 with_params
= std::string (sym
) + " ( int ) &&";
4814 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4818 /* Check that the name matching algorithm for completion doesn't get
4819 confused with Latin1 'ÿ' / 0xff. */
4821 static const char str
[] = "\377";
4822 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4823 EXPECT ("\377", "\377\377123"));
4826 /* Check that the increment-last-char in the matching algorithm for
4827 completion doesn't match "t1_fund" when completing "t1_func". */
4829 static const char str
[] = "t1_func";
4830 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4831 EXPECT ("t1_func", "t1_func1"));
4834 /* Check that completion mode works at each prefix of the expected
4837 static const char str
[] = "function(int)";
4838 size_t len
= strlen (str
);
4841 for (size_t i
= 1; i
< len
; i
++)
4843 lookup
.assign (str
, i
);
4844 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4845 EXPECT ("function"));
4849 /* While "w" is a prefix of both components, the match function
4850 should still only be called once. */
4852 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4854 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4858 /* Same, with a "complicated" symbol. */
4860 static const char str
[] = Z_SYM_NAME
;
4861 size_t len
= strlen (str
);
4864 for (size_t i
= 1; i
< len
; i
++)
4866 lookup
.assign (str
, i
);
4867 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4868 EXPECT (Z_SYM_NAME
));
4872 /* In FULL mode, an incomplete symbol doesn't match. */
4874 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4878 /* A complete symbol with parameters matches any overload, since the
4879 index has no overload info. */
4881 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4882 EXPECT ("std::zfunction", "std::zfunction2"));
4883 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4884 EXPECT ("std::zfunction", "std::zfunction2"));
4885 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4886 EXPECT ("std::zfunction", "std::zfunction2"));
4889 /* Check that whitespace is ignored appropriately. A symbol with a
4890 template argument list. */
4892 static const char expected
[] = "ns::foo<int>";
4893 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4895 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4899 /* Check that whitespace is ignored appropriately. A symbol with a
4900 template argument list that includes a pointer. */
4902 static const char expected
[] = "ns::foo<char*>";
4903 /* Try both completion and non-completion modes. */
4904 static const bool completion_mode
[2] = {false, true};
4905 for (size_t i
= 0; i
< 2; i
++)
4907 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4908 completion_mode
[i
], EXPECT (expected
));
4909 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4910 completion_mode
[i
], EXPECT (expected
));
4912 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4913 completion_mode
[i
], EXPECT (expected
));
4914 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4915 completion_mode
[i
], EXPECT (expected
));
4920 /* Check method qualifiers are ignored. */
4921 static const char expected
[] = "ns::foo<char*>";
4922 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4923 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4924 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4925 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4926 CHECK_MATCH ("foo < char * > ( int ) const",
4927 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4928 CHECK_MATCH ("foo < char * > ( int ) &&",
4929 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4932 /* Test lookup names that don't match anything. */
4934 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4937 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4941 /* Some wild matching tests, exercising "(anonymous namespace)",
4942 which should not be confused with a parameter list. */
4944 static const char *syms
[] = {
4948 "A :: B :: C ( int )",
4953 for (const char *s
: syms
)
4955 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4956 EXPECT ("(anonymous namespace)::A::B::C"));
4961 static const char expected
[] = "ns2::tmpl<int>::foo2";
4962 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4964 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4968 SELF_CHECK (!any_mismatch
);
4977 test_mapped_index_find_name_component_bounds ();
4978 test_dw2_expand_symtabs_matching_symbol ();
4981 }} // namespace selftests::dw2_expand_symtabs_matching
4983 #endif /* GDB_SELF_TEST */
4985 /* If FILE_MATCHER is NULL or if PER_CU has
4986 dwarf2_per_cu_quick_data::MARK set (see
4987 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4988 EXPANSION_NOTIFY on it. */
4991 dw2_expand_symtabs_matching_one
4992 (struct dwarf2_per_cu_data
*per_cu
,
4993 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4994 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4996 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4998 bool symtab_was_null
4999 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
5001 dw2_instantiate_symtab (per_cu
, false);
5003 if (expansion_notify
!= NULL
5005 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
5006 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
5010 /* Helper for dw2_expand_matching symtabs. Called on each symbol
5011 matched, to expand corresponding CUs that were marked. IDX is the
5012 index of the symbol name that matched. */
5015 dw2_expand_marked_cus
5016 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
5017 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5018 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5021 offset_type
*vec
, vec_len
, vec_idx
;
5022 bool global_seen
= false;
5023 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5025 vec
= (offset_type
*) (index
.constant_pool
5026 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
5027 vec_len
= MAYBE_SWAP (vec
[0]);
5028 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
5030 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
5031 /* This value is only valid for index versions >= 7. */
5032 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
5033 gdb_index_symbol_kind symbol_kind
=
5034 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
5035 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
5036 /* Only check the symbol attributes if they're present.
5037 Indices prior to version 7 don't record them,
5038 and indices >= 7 may elide them for certain symbols
5039 (gold does this). */
5042 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
5044 /* Work around gold/15646. */
5047 if (!is_static
&& global_seen
)
5053 /* Only check the symbol's kind if it has one. */
5058 case VARIABLES_DOMAIN
:
5059 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
5062 case FUNCTIONS_DOMAIN
:
5063 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
5067 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
5075 /* Don't crash on bad data. */
5076 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
5077 + dwarf2_per_objfile
->all_type_units
.size ()))
5079 complaint (_(".gdb_index entry has bad CU index"
5081 objfile_name (dwarf2_per_objfile
->objfile
));
5085 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
5086 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5091 /* If FILE_MATCHER is non-NULL, set all the
5092 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
5093 that match FILE_MATCHER. */
5096 dw_expand_symtabs_matching_file_matcher
5097 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5098 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
5100 if (file_matcher
== NULL
)
5103 objfile
*const objfile
= dwarf2_per_objfile
->objfile
;
5105 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
5107 NULL
, xcalloc
, xfree
));
5108 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
5110 NULL
, xcalloc
, xfree
));
5112 /* The rule is CUs specify all the files, including those used by
5113 any TU, so there's no need to scan TUs here. */
5115 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5119 per_cu
->v
.quick
->mark
= 0;
5121 /* We only need to look at symtabs not already expanded. */
5122 if (per_cu
->v
.quick
->compunit_symtab
)
5125 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5126 if (file_data
== NULL
)
5129 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
5131 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
5133 per_cu
->v
.quick
->mark
= 1;
5137 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5139 const char *this_real_name
;
5141 if (file_matcher (file_data
->file_names
[j
], false))
5143 per_cu
->v
.quick
->mark
= 1;
5147 /* Before we invoke realpath, which can get expensive when many
5148 files are involved, do a quick comparison of the basenames. */
5149 if (!basenames_may_differ
5150 && !file_matcher (lbasename (file_data
->file_names
[j
]),
5154 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
5155 if (file_matcher (this_real_name
, false))
5157 per_cu
->v
.quick
->mark
= 1;
5162 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
5163 ? visited_found
.get ()
5164 : visited_not_found
.get (),
5171 dw2_expand_symtabs_matching
5172 (struct objfile
*objfile
,
5173 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5174 const lookup_name_info
&lookup_name
,
5175 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5176 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5177 enum search_domain kind
)
5179 struct dwarf2_per_objfile
*dwarf2_per_objfile
5180 = get_dwarf2_per_objfile (objfile
);
5182 /* index_table is NULL if OBJF_READNOW. */
5183 if (!dwarf2_per_objfile
->index_table
)
5186 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5188 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5190 dw2_expand_symtabs_matching_symbol (index
, lookup_name
,
5192 kind
, [&] (offset_type idx
)
5194 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
5195 expansion_notify
, kind
);
5199 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
5202 static struct compunit_symtab
*
5203 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
5208 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
5209 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
5212 if (cust
->includes
== NULL
)
5215 for (i
= 0; cust
->includes
[i
]; ++i
)
5217 struct compunit_symtab
*s
= cust
->includes
[i
];
5219 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
5227 static struct compunit_symtab
*
5228 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
5229 struct bound_minimal_symbol msymbol
,
5231 struct obj_section
*section
,
5234 struct dwarf2_per_cu_data
*data
;
5235 struct compunit_symtab
*result
;
5237 if (!objfile
->psymtabs_addrmap
)
5240 data
= (struct dwarf2_per_cu_data
*) addrmap_find (objfile
->psymtabs_addrmap
,
5245 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
5246 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
5247 paddress (get_objfile_arch (objfile
), pc
));
5250 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
,
5253 gdb_assert (result
!= NULL
);
5258 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
5259 void *data
, int need_fullname
)
5261 struct dwarf2_per_objfile
*dwarf2_per_objfile
5262 = get_dwarf2_per_objfile (objfile
);
5264 if (!dwarf2_per_objfile
->filenames_cache
)
5266 dwarf2_per_objfile
->filenames_cache
.emplace ();
5268 htab_up
visited (htab_create_alloc (10,
5269 htab_hash_pointer
, htab_eq_pointer
,
5270 NULL
, xcalloc
, xfree
));
5272 /* The rule is CUs specify all the files, including those used
5273 by any TU, so there's no need to scan TUs here. We can
5274 ignore file names coming from already-expanded CUs. */
5276 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5278 if (per_cu
->v
.quick
->compunit_symtab
)
5280 void **slot
= htab_find_slot (visited
.get (),
5281 per_cu
->v
.quick
->file_names
,
5284 *slot
= per_cu
->v
.quick
->file_names
;
5288 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5290 /* We only need to look at symtabs not already expanded. */
5291 if (per_cu
->v
.quick
->compunit_symtab
)
5294 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5295 if (file_data
== NULL
)
5298 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
5301 /* Already visited. */
5306 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5308 const char *filename
= file_data
->file_names
[j
];
5309 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
5314 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
5316 gdb::unique_xmalloc_ptr
<char> this_real_name
;
5319 this_real_name
= gdb_realpath (filename
);
5320 (*fun
) (filename
, this_real_name
.get (), data
);
5325 dw2_has_symbols (struct objfile
*objfile
)
5330 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
5333 dw2_find_last_source_symtab
,
5334 dw2_forget_cached_source_info
,
5335 dw2_map_symtabs_matching_filename
,
5340 dw2_expand_symtabs_for_function
,
5341 dw2_expand_all_symtabs
,
5342 dw2_expand_symtabs_with_fullname
,
5343 dw2_map_matching_symbols
,
5344 dw2_expand_symtabs_matching
,
5345 dw2_find_pc_sect_compunit_symtab
,
5347 dw2_map_symbol_filenames
5350 /* DWARF-5 debug_names reader. */
5352 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
5353 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
5355 /* A helper function that reads the .debug_names section in SECTION
5356 and fills in MAP. FILENAME is the name of the file containing the
5357 section; it is used for error reporting.
5359 Returns true if all went well, false otherwise. */
5362 read_debug_names_from_section (struct objfile
*objfile
,
5363 const char *filename
,
5364 struct dwarf2_section_info
*section
,
5365 mapped_debug_names
&map
)
5367 if (dwarf2_section_empty_p (section
))
5370 /* Older elfutils strip versions could keep the section in the main
5371 executable while splitting it for the separate debug info file. */
5372 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
5375 dwarf2_read_section (objfile
, section
);
5377 map
.dwarf5_byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
5379 const gdb_byte
*addr
= section
->buffer
;
5381 bfd
*const abfd
= get_section_bfd_owner (section
);
5383 unsigned int bytes_read
;
5384 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
5387 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
5388 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
5389 if (bytes_read
+ length
!= section
->size
)
5391 /* There may be multiple per-CU indices. */
5392 warning (_("Section .debug_names in %s length %s does not match "
5393 "section length %s, ignoring .debug_names."),
5394 filename
, plongest (bytes_read
+ length
),
5395 pulongest (section
->size
));
5399 /* The version number. */
5400 uint16_t version
= read_2_bytes (abfd
, addr
);
5404 warning (_("Section .debug_names in %s has unsupported version %d, "
5405 "ignoring .debug_names."),
5411 uint16_t padding
= read_2_bytes (abfd
, addr
);
5415 warning (_("Section .debug_names in %s has unsupported padding %d, "
5416 "ignoring .debug_names."),
5421 /* comp_unit_count - The number of CUs in the CU list. */
5422 map
.cu_count
= read_4_bytes (abfd
, addr
);
5425 /* local_type_unit_count - The number of TUs in the local TU
5427 map
.tu_count
= read_4_bytes (abfd
, addr
);
5430 /* foreign_type_unit_count - The number of TUs in the foreign TU
5432 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
5434 if (foreign_tu_count
!= 0)
5436 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
5437 "ignoring .debug_names."),
5438 filename
, static_cast<unsigned long> (foreign_tu_count
));
5442 /* bucket_count - The number of hash buckets in the hash lookup
5444 map
.bucket_count
= read_4_bytes (abfd
, addr
);
5447 /* name_count - The number of unique names in the index. */
5448 map
.name_count
= read_4_bytes (abfd
, addr
);
5451 /* abbrev_table_size - The size in bytes of the abbreviations
5453 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
5456 /* augmentation_string_size - The size in bytes of the augmentation
5457 string. This value is rounded up to a multiple of 4. */
5458 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
5460 map
.augmentation_is_gdb
= ((augmentation_string_size
5461 == sizeof (dwarf5_augmentation
))
5462 && memcmp (addr
, dwarf5_augmentation
,
5463 sizeof (dwarf5_augmentation
)) == 0);
5464 augmentation_string_size
+= (-augmentation_string_size
) & 3;
5465 addr
+= augmentation_string_size
;
5468 map
.cu_table_reordered
= addr
;
5469 addr
+= map
.cu_count
* map
.offset_size
;
5471 /* List of Local TUs */
5472 map
.tu_table_reordered
= addr
;
5473 addr
+= map
.tu_count
* map
.offset_size
;
5475 /* Hash Lookup Table */
5476 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5477 addr
+= map
.bucket_count
* 4;
5478 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5479 addr
+= map
.name_count
* 4;
5482 map
.name_table_string_offs_reordered
= addr
;
5483 addr
+= map
.name_count
* map
.offset_size
;
5484 map
.name_table_entry_offs_reordered
= addr
;
5485 addr
+= map
.name_count
* map
.offset_size
;
5487 const gdb_byte
*abbrev_table_start
= addr
;
5490 unsigned int bytes_read
;
5491 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5496 const auto insertpair
5497 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5498 if (!insertpair
.second
)
5500 warning (_("Section .debug_names in %s has duplicate index %s, "
5501 "ignoring .debug_names."),
5502 filename
, pulongest (index_num
));
5505 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5506 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5511 mapped_debug_names::index_val::attr attr
;
5512 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5514 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5516 if (attr
.form
== DW_FORM_implicit_const
)
5518 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5522 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5524 indexval
.attr_vec
.push_back (std::move (attr
));
5527 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5529 warning (_("Section .debug_names in %s has abbreviation_table "
5530 "of size %zu vs. written as %u, ignoring .debug_names."),
5531 filename
, addr
- abbrev_table_start
, abbrev_table_size
);
5534 map
.entry_pool
= addr
;
5539 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5543 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5544 const mapped_debug_names
&map
,
5545 dwarf2_section_info
§ion
,
5548 sect_offset sect_off_prev
;
5549 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5551 sect_offset sect_off_next
;
5552 if (i
< map
.cu_count
)
5555 = (sect_offset
) (extract_unsigned_integer
5556 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5558 map
.dwarf5_byte_order
));
5561 sect_off_next
= (sect_offset
) section
.size
;
5564 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5565 dwarf2_per_cu_data
*per_cu
5566 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5567 sect_off_prev
, length
);
5568 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5570 sect_off_prev
= sect_off_next
;
5574 /* Read the CU list from the mapped index, and use it to create all
5575 the CU objects for this dwarf2_per_objfile. */
5578 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5579 const mapped_debug_names
&map
,
5580 const mapped_debug_names
&dwz_map
)
5582 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
5583 dwarf2_per_objfile
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5585 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5586 dwarf2_per_objfile
->info
,
5587 false /* is_dwz */);
5589 if (dwz_map
.cu_count
== 0)
5592 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5593 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5597 /* Read .debug_names. If everything went ok, initialize the "quick"
5598 elements of all the CUs and return true. Otherwise, return false. */
5601 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5603 std::unique_ptr
<mapped_debug_names
> map
5604 (new mapped_debug_names (dwarf2_per_objfile
));
5605 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5606 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5608 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5609 &dwarf2_per_objfile
->debug_names
,
5613 /* Don't use the index if it's empty. */
5614 if (map
->name_count
== 0)
5617 /* If there is a .dwz file, read it so we can get its CU list as
5619 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5622 if (!read_debug_names_from_section (objfile
,
5623 bfd_get_filename (dwz
->dwz_bfd
),
5624 &dwz
->debug_names
, dwz_map
))
5626 warning (_("could not read '.debug_names' section from %s; skipping"),
5627 bfd_get_filename (dwz
->dwz_bfd
));
5632 create_cus_from_debug_names (dwarf2_per_objfile
, *map
, dwz_map
);
5634 if (map
->tu_count
!= 0)
5636 /* We can only handle a single .debug_types when we have an
5638 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
5641 dwarf2_section_info
*section
= VEC_index (dwarf2_section_info_def
,
5642 dwarf2_per_objfile
->types
, 0);
5644 create_signatured_type_table_from_debug_names
5645 (dwarf2_per_objfile
, *map
, section
, &dwarf2_per_objfile
->abbrev
);
5648 create_addrmap_from_aranges (dwarf2_per_objfile
,
5649 &dwarf2_per_objfile
->debug_aranges
);
5651 dwarf2_per_objfile
->debug_names_table
= std::move (map
);
5652 dwarf2_per_objfile
->using_index
= 1;
5653 dwarf2_per_objfile
->quick_file_names_table
=
5654 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
5659 /* Type used to manage iterating over all CUs looking for a symbol for
5662 class dw2_debug_names_iterator
5665 /* If WANT_SPECIFIC_BLOCK is true, only look for symbols in block
5666 BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
5667 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5668 bool want_specific_block
,
5669 block_enum block_index
, domain_enum domain
,
5671 : m_map (map
), m_want_specific_block (want_specific_block
),
5672 m_block_index (block_index
), m_domain (domain
),
5673 m_addr (find_vec_in_debug_names (map
, name
))
5676 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5677 search_domain search
, uint32_t namei
)
5680 m_addr (find_vec_in_debug_names (map
, namei
))
5683 /* Return the next matching CU or NULL if there are no more. */
5684 dwarf2_per_cu_data
*next ();
5687 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5689 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5692 /* The internalized form of .debug_names. */
5693 const mapped_debug_names
&m_map
;
5695 /* If true, only look for symbols that match BLOCK_INDEX. */
5696 const bool m_want_specific_block
= false;
5698 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
5699 Unused if !WANT_SPECIFIC_BLOCK - FIRST_LOCAL_BLOCK is an invalid
5701 const block_enum m_block_index
= FIRST_LOCAL_BLOCK
;
5703 /* The kind of symbol we're looking for. */
5704 const domain_enum m_domain
= UNDEF_DOMAIN
;
5705 const search_domain m_search
= ALL_DOMAIN
;
5707 /* The list of CUs from the index entry of the symbol, or NULL if
5709 const gdb_byte
*m_addr
;
5713 mapped_debug_names::namei_to_name (uint32_t namei
) const
5715 const ULONGEST namei_string_offs
5716 = extract_unsigned_integer ((name_table_string_offs_reordered
5717 + namei
* offset_size
),
5720 return read_indirect_string_at_offset
5721 (dwarf2_per_objfile
, dwarf2_per_objfile
->objfile
->obfd
, namei_string_offs
);
5724 /* Find a slot in .debug_names for the object named NAME. If NAME is
5725 found, return pointer to its pool data. If NAME cannot be found,
5729 dw2_debug_names_iterator::find_vec_in_debug_names
5730 (const mapped_debug_names
&map
, const char *name
)
5732 int (*cmp
) (const char *, const char *);
5734 if (current_language
->la_language
== language_cplus
5735 || current_language
->la_language
== language_fortran
5736 || current_language
->la_language
== language_d
)
5738 /* NAME is already canonical. Drop any qualifiers as
5739 .debug_names does not contain any. */
5741 if (strchr (name
, '(') != NULL
)
5743 gdb::unique_xmalloc_ptr
<char> without_params
5744 = cp_remove_params (name
);
5746 if (without_params
!= NULL
)
5748 name
= without_params
.get();
5753 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5755 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5757 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5758 (map
.bucket_table_reordered
5759 + (full_hash
% map
.bucket_count
)), 4,
5760 map
.dwarf5_byte_order
);
5764 if (namei
>= map
.name_count
)
5766 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5768 namei
, map
.name_count
,
5769 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5775 const uint32_t namei_full_hash
5776 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5777 (map
.hash_table_reordered
+ namei
), 4,
5778 map
.dwarf5_byte_order
);
5779 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5782 if (full_hash
== namei_full_hash
)
5784 const char *const namei_string
= map
.namei_to_name (namei
);
5786 #if 0 /* An expensive sanity check. */
5787 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5789 complaint (_("Wrong .debug_names hash for string at index %u "
5791 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5796 if (cmp (namei_string
, name
) == 0)
5798 const ULONGEST namei_entry_offs
5799 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5800 + namei
* map
.offset_size
),
5801 map
.offset_size
, map
.dwarf5_byte_order
);
5802 return map
.entry_pool
+ namei_entry_offs
;
5807 if (namei
>= map
.name_count
)
5813 dw2_debug_names_iterator::find_vec_in_debug_names
5814 (const mapped_debug_names
&map
, uint32_t namei
)
5816 if (namei
>= map
.name_count
)
5818 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5820 namei
, map
.name_count
,
5821 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5825 const ULONGEST namei_entry_offs
5826 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5827 + namei
* map
.offset_size
),
5828 map
.offset_size
, map
.dwarf5_byte_order
);
5829 return map
.entry_pool
+ namei_entry_offs
;
5832 /* See dw2_debug_names_iterator. */
5834 dwarf2_per_cu_data
*
5835 dw2_debug_names_iterator::next ()
5840 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5841 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5842 bfd
*const abfd
= objfile
->obfd
;
5846 unsigned int bytes_read
;
5847 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5848 m_addr
+= bytes_read
;
5852 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5853 if (indexval_it
== m_map
.abbrev_map
.cend ())
5855 complaint (_("Wrong .debug_names undefined abbrev code %s "
5857 pulongest (abbrev
), objfile_name (objfile
));
5860 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5861 bool have_is_static
= false;
5863 dwarf2_per_cu_data
*per_cu
= NULL
;
5864 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5869 case DW_FORM_implicit_const
:
5870 ull
= attr
.implicit_const
;
5872 case DW_FORM_flag_present
:
5876 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5877 m_addr
+= bytes_read
;
5880 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5881 dwarf_form_name (attr
.form
),
5882 objfile_name (objfile
));
5885 switch (attr
.dw_idx
)
5887 case DW_IDX_compile_unit
:
5888 /* Don't crash on bad data. */
5889 if (ull
>= dwarf2_per_objfile
->all_comp_units
.size ())
5891 complaint (_(".debug_names entry has bad CU index %s"
5894 objfile_name (dwarf2_per_objfile
->objfile
));
5897 per_cu
= dwarf2_per_objfile
->get_cutu (ull
);
5899 case DW_IDX_type_unit
:
5900 /* Don't crash on bad data. */
5901 if (ull
>= dwarf2_per_objfile
->all_type_units
.size ())
5903 complaint (_(".debug_names entry has bad TU index %s"
5906 objfile_name (dwarf2_per_objfile
->objfile
));
5909 per_cu
= &dwarf2_per_objfile
->get_tu (ull
)->per_cu
;
5911 case DW_IDX_GNU_internal
:
5912 if (!m_map
.augmentation_is_gdb
)
5914 have_is_static
= true;
5917 case DW_IDX_GNU_external
:
5918 if (!m_map
.augmentation_is_gdb
)
5920 have_is_static
= true;
5926 /* Skip if already read in. */
5927 if (per_cu
->v
.quick
->compunit_symtab
)
5930 /* Check static vs global. */
5933 const bool want_static
= m_block_index
!= GLOBAL_BLOCK
;
5934 if (m_want_specific_block
&& want_static
!= is_static
)
5938 /* Match dw2_symtab_iter_next, symbol_kind
5939 and debug_names::psymbol_tag. */
5943 switch (indexval
.dwarf_tag
)
5945 case DW_TAG_variable
:
5946 case DW_TAG_subprogram
:
5947 /* Some types are also in VAR_DOMAIN. */
5948 case DW_TAG_typedef
:
5949 case DW_TAG_structure_type
:
5956 switch (indexval
.dwarf_tag
)
5958 case DW_TAG_typedef
:
5959 case DW_TAG_structure_type
:
5966 switch (indexval
.dwarf_tag
)
5969 case DW_TAG_variable
:
5979 /* Match dw2_expand_symtabs_matching, symbol_kind and
5980 debug_names::psymbol_tag. */
5983 case VARIABLES_DOMAIN
:
5984 switch (indexval
.dwarf_tag
)
5986 case DW_TAG_variable
:
5992 case FUNCTIONS_DOMAIN
:
5993 switch (indexval
.dwarf_tag
)
5995 case DW_TAG_subprogram
:
6002 switch (indexval
.dwarf_tag
)
6004 case DW_TAG_typedef
:
6005 case DW_TAG_structure_type
:
6018 static struct compunit_symtab
*
6019 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, int block_index_int
,
6020 const char *name
, domain_enum domain
)
6022 const block_enum block_index
= static_cast<block_enum
> (block_index_int
);
6023 struct dwarf2_per_objfile
*dwarf2_per_objfile
6024 = get_dwarf2_per_objfile (objfile
);
6026 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
6029 /* index is NULL if OBJF_READNOW. */
6032 const auto &map
= *mapp
;
6034 dw2_debug_names_iterator
iter (map
, true /* want_specific_block */,
6035 block_index
, domain
, name
);
6037 struct compunit_symtab
*stab_best
= NULL
;
6038 struct dwarf2_per_cu_data
*per_cu
;
6039 while ((per_cu
= iter
.next ()) != NULL
)
6041 struct symbol
*sym
, *with_opaque
= NULL
;
6042 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
6043 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
6044 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
6046 sym
= block_find_symbol (block
, name
, domain
,
6047 block_find_non_opaque_type_preferred
,
6050 /* Some caution must be observed with overloaded functions and
6051 methods, since the index will not contain any overload
6052 information (but NAME might contain it). */
6055 && strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
6057 if (with_opaque
!= NULL
6058 && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque
), name
) == 0)
6061 /* Keep looking through other CUs. */
6067 /* This dumps minimal information about .debug_names. It is called
6068 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
6069 uses this to verify that .debug_names has been loaded. */
6072 dw2_debug_names_dump (struct objfile
*objfile
)
6074 struct dwarf2_per_objfile
*dwarf2_per_objfile
6075 = get_dwarf2_per_objfile (objfile
);
6077 gdb_assert (dwarf2_per_objfile
->using_index
);
6078 printf_filtered (".debug_names:");
6079 if (dwarf2_per_objfile
->debug_names_table
)
6080 printf_filtered (" exists\n");
6082 printf_filtered (" faked for \"readnow\"\n");
6083 printf_filtered ("\n");
6087 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
6088 const char *func_name
)
6090 struct dwarf2_per_objfile
*dwarf2_per_objfile
6091 = get_dwarf2_per_objfile (objfile
);
6093 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
6094 if (dwarf2_per_objfile
->debug_names_table
)
6096 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6098 /* Note: It doesn't matter what we pass for block_index here. */
6099 dw2_debug_names_iterator
iter (map
, false /* want_specific_block */,
6100 GLOBAL_BLOCK
, VAR_DOMAIN
, func_name
);
6102 struct dwarf2_per_cu_data
*per_cu
;
6103 while ((per_cu
= iter
.next ()) != NULL
)
6104 dw2_instantiate_symtab (per_cu
, false);
6109 dw2_debug_names_expand_symtabs_matching
6110 (struct objfile
*objfile
,
6111 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
6112 const lookup_name_info
&lookup_name
,
6113 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
6114 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
6115 enum search_domain kind
)
6117 struct dwarf2_per_objfile
*dwarf2_per_objfile
6118 = get_dwarf2_per_objfile (objfile
);
6120 /* debug_names_table is NULL if OBJF_READNOW. */
6121 if (!dwarf2_per_objfile
->debug_names_table
)
6124 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
6126 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6128 dw2_expand_symtabs_matching_symbol (map
, lookup_name
,
6130 kind
, [&] (offset_type namei
)
6132 /* The name was matched, now expand corresponding CUs that were
6134 dw2_debug_names_iterator
iter (map
, kind
, namei
);
6136 struct dwarf2_per_cu_data
*per_cu
;
6137 while ((per_cu
= iter
.next ()) != NULL
)
6138 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
6143 const struct quick_symbol_functions dwarf2_debug_names_functions
=
6146 dw2_find_last_source_symtab
,
6147 dw2_forget_cached_source_info
,
6148 dw2_map_symtabs_matching_filename
,
6149 dw2_debug_names_lookup_symbol
,
6151 dw2_debug_names_dump
,
6153 dw2_debug_names_expand_symtabs_for_function
,
6154 dw2_expand_all_symtabs
,
6155 dw2_expand_symtabs_with_fullname
,
6156 dw2_map_matching_symbols
,
6157 dw2_debug_names_expand_symtabs_matching
,
6158 dw2_find_pc_sect_compunit_symtab
,
6160 dw2_map_symbol_filenames
6163 /* See symfile.h. */
6166 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
6168 struct dwarf2_per_objfile
*dwarf2_per_objfile
6169 = get_dwarf2_per_objfile (objfile
);
6171 /* If we're about to read full symbols, don't bother with the
6172 indices. In this case we also don't care if some other debug
6173 format is making psymtabs, because they are all about to be
6175 if ((objfile
->flags
& OBJF_READNOW
))
6177 dwarf2_per_objfile
->using_index
= 1;
6178 create_all_comp_units (dwarf2_per_objfile
);
6179 create_all_type_units (dwarf2_per_objfile
);
6180 dwarf2_per_objfile
->quick_file_names_table
6181 = create_quick_file_names_table
6182 (dwarf2_per_objfile
->all_comp_units
.size ());
6184 for (int i
= 0; i
< (dwarf2_per_objfile
->all_comp_units
.size ()
6185 + dwarf2_per_objfile
->all_type_units
.size ()); ++i
)
6187 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
6189 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6190 struct dwarf2_per_cu_quick_data
);
6193 /* Return 1 so that gdb sees the "quick" functions. However,
6194 these functions will be no-ops because we will have expanded
6196 *index_kind
= dw_index_kind::GDB_INDEX
;
6200 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
6202 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6206 if (dwarf2_read_gdb_index (dwarf2_per_objfile
))
6208 *index_kind
= dw_index_kind::GDB_INDEX
;
6217 /* Build a partial symbol table. */
6220 dwarf2_build_psymtabs (struct objfile
*objfile
)
6222 struct dwarf2_per_objfile
*dwarf2_per_objfile
6223 = get_dwarf2_per_objfile (objfile
);
6225 if (objfile
->global_psymbols
.capacity () == 0
6226 && objfile
->static_psymbols
.capacity () == 0)
6227 init_psymbol_list (objfile
, 1024);
6231 /* This isn't really ideal: all the data we allocate on the
6232 objfile's obstack is still uselessly kept around. However,
6233 freeing it seems unsafe. */
6234 psymtab_discarder
psymtabs (objfile
);
6235 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
6238 CATCH (except
, RETURN_MASK_ERROR
)
6240 exception_print (gdb_stderr
, except
);
6245 /* Return the total length of the CU described by HEADER. */
6248 get_cu_length (const struct comp_unit_head
*header
)
6250 return header
->initial_length_size
+ header
->length
;
6253 /* Return TRUE if SECT_OFF is within CU_HEADER. */
6256 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
6258 sect_offset bottom
= cu_header
->sect_off
;
6259 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
6261 return sect_off
>= bottom
&& sect_off
< top
;
6264 /* Find the base address of the compilation unit for range lists and
6265 location lists. It will normally be specified by DW_AT_low_pc.
6266 In DWARF-3 draft 4, the base address could be overridden by
6267 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6268 compilation units with discontinuous ranges. */
6271 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6273 struct attribute
*attr
;
6276 cu
->base_address
= 0;
6278 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6281 cu
->base_address
= attr_value_as_address (attr
);
6286 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6289 cu
->base_address
= attr_value_as_address (attr
);
6295 /* Read in the comp unit header information from the debug_info at info_ptr.
6296 Use rcuh_kind::COMPILE as the default type if not known by the caller.
6297 NOTE: This leaves members offset, first_die_offset to be filled in
6300 static const gdb_byte
*
6301 read_comp_unit_head (struct comp_unit_head
*cu_header
,
6302 const gdb_byte
*info_ptr
,
6303 struct dwarf2_section_info
*section
,
6304 rcuh_kind section_kind
)
6307 unsigned int bytes_read
;
6308 const char *filename
= get_section_file_name (section
);
6309 bfd
*abfd
= get_section_bfd_owner (section
);
6311 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
6312 cu_header
->initial_length_size
= bytes_read
;
6313 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
6314 info_ptr
+= bytes_read
;
6315 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
6316 if (cu_header
->version
< 2 || cu_header
->version
> 5)
6317 error (_("Dwarf Error: wrong version in compilation unit header "
6318 "(is %d, should be 2, 3, 4 or 5) [in module %s]"),
6319 cu_header
->version
, filename
);
6321 if (cu_header
->version
< 5)
6322 switch (section_kind
)
6324 case rcuh_kind::COMPILE
:
6325 cu_header
->unit_type
= DW_UT_compile
;
6327 case rcuh_kind::TYPE
:
6328 cu_header
->unit_type
= DW_UT_type
;
6331 internal_error (__FILE__
, __LINE__
,
6332 _("read_comp_unit_head: invalid section_kind"));
6336 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
6337 (read_1_byte (abfd
, info_ptr
));
6339 switch (cu_header
->unit_type
)
6342 if (section_kind
!= rcuh_kind::COMPILE
)
6343 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6344 "(is DW_UT_compile, should be DW_UT_type) [in module %s]"),
6348 section_kind
= rcuh_kind::TYPE
;
6351 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6352 "(is %d, should be %d or %d) [in module %s]"),
6353 cu_header
->unit_type
, DW_UT_compile
, DW_UT_type
, filename
);
6356 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6359 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
6362 info_ptr
+= bytes_read
;
6363 if (cu_header
->version
< 5)
6365 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6368 signed_addr
= bfd_get_sign_extend_vma (abfd
);
6369 if (signed_addr
< 0)
6370 internal_error (__FILE__
, __LINE__
,
6371 _("read_comp_unit_head: dwarf from non elf file"));
6372 cu_header
->signed_addr_p
= signed_addr
;
6374 if (section_kind
== rcuh_kind::TYPE
)
6376 LONGEST type_offset
;
6378 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
6381 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
6382 info_ptr
+= bytes_read
;
6383 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
6384 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
6385 error (_("Dwarf Error: Too big type_offset in compilation unit "
6386 "header (is %s) [in module %s]"), plongest (type_offset
),
6393 /* Helper function that returns the proper abbrev section for
6396 static struct dwarf2_section_info
*
6397 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6399 struct dwarf2_section_info
*abbrev
;
6400 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6402 if (this_cu
->is_dwz
)
6403 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
6405 abbrev
= &dwarf2_per_objfile
->abbrev
;
6410 /* Subroutine of read_and_check_comp_unit_head and
6411 read_and_check_type_unit_head to simplify them.
6412 Perform various error checking on the header. */
6415 error_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6416 struct comp_unit_head
*header
,
6417 struct dwarf2_section_info
*section
,
6418 struct dwarf2_section_info
*abbrev_section
)
6420 const char *filename
= get_section_file_name (section
);
6422 if (to_underlying (header
->abbrev_sect_off
)
6423 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
6424 error (_("Dwarf Error: bad offset (%s) in compilation unit header "
6425 "(offset %s + 6) [in module %s]"),
6426 sect_offset_str (header
->abbrev_sect_off
),
6427 sect_offset_str (header
->sect_off
),
6430 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
6431 avoid potential 32-bit overflow. */
6432 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
6434 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
6435 "(offset %s + 0) [in module %s]"),
6436 header
->length
, sect_offset_str (header
->sect_off
),
6440 /* Read in a CU/TU header and perform some basic error checking.
6441 The contents of the header are stored in HEADER.
6442 The result is a pointer to the start of the first DIE. */
6444 static const gdb_byte
*
6445 read_and_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6446 struct comp_unit_head
*header
,
6447 struct dwarf2_section_info
*section
,
6448 struct dwarf2_section_info
*abbrev_section
,
6449 const gdb_byte
*info_ptr
,
6450 rcuh_kind section_kind
)
6452 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
6454 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
6456 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
6458 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
6460 error_check_comp_unit_head (dwarf2_per_objfile
, header
, section
,
6466 /* Fetch the abbreviation table offset from a comp or type unit header. */
6469 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6470 struct dwarf2_section_info
*section
,
6471 sect_offset sect_off
)
6473 bfd
*abfd
= get_section_bfd_owner (section
);
6474 const gdb_byte
*info_ptr
;
6475 unsigned int initial_length_size
, offset_size
;
6478 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
6479 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6480 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6481 offset_size
= initial_length_size
== 4 ? 4 : 8;
6482 info_ptr
+= initial_length_size
;
6484 version
= read_2_bytes (abfd
, info_ptr
);
6488 /* Skip unit type and address size. */
6492 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
6495 /* Allocate a new partial symtab for file named NAME and mark this new
6496 partial symtab as being an include of PST. */
6499 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
6500 struct objfile
*objfile
)
6502 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
6504 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6506 /* It shares objfile->objfile_obstack. */
6507 subpst
->dirname
= pst
->dirname
;
6510 subpst
->textlow
= 0;
6511 subpst
->texthigh
= 0;
6513 subpst
->dependencies
6514 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
6515 subpst
->dependencies
[0] = pst
;
6516 subpst
->number_of_dependencies
= 1;
6518 subpst
->globals_offset
= 0;
6519 subpst
->n_global_syms
= 0;
6520 subpst
->statics_offset
= 0;
6521 subpst
->n_static_syms
= 0;
6522 subpst
->compunit_symtab
= NULL
;
6523 subpst
->read_symtab
= pst
->read_symtab
;
6526 /* No private part is necessary for include psymtabs. This property
6527 can be used to differentiate between such include psymtabs and
6528 the regular ones. */
6529 subpst
->read_symtab_private
= NULL
;
6532 /* Read the Line Number Program data and extract the list of files
6533 included by the source file represented by PST. Build an include
6534 partial symtab for each of these included files. */
6537 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6538 struct die_info
*die
,
6539 struct partial_symtab
*pst
)
6542 struct attribute
*attr
;
6544 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6546 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6548 return; /* No linetable, so no includes. */
6550 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
6551 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
6555 hash_signatured_type (const void *item
)
6557 const struct signatured_type
*sig_type
6558 = (const struct signatured_type
*) item
;
6560 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6561 return sig_type
->signature
;
6565 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6567 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6568 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6570 return lhs
->signature
== rhs
->signature
;
6573 /* Allocate a hash table for signatured types. */
6576 allocate_signatured_type_table (struct objfile
*objfile
)
6578 return htab_create_alloc_ex (41,
6579 hash_signatured_type
,
6582 &objfile
->objfile_obstack
,
6583 hashtab_obstack_allocate
,
6584 dummy_obstack_deallocate
);
6587 /* A helper function to add a signatured type CU to a table. */
6590 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6592 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6593 std::vector
<signatured_type
*> *all_type_units
6594 = (std::vector
<signatured_type
*> *) datum
;
6596 all_type_units
->push_back (sigt
);
6601 /* A helper for create_debug_types_hash_table. Read types from SECTION
6602 and fill them into TYPES_HTAB. It will process only type units,
6603 therefore DW_UT_type. */
6606 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6607 struct dwo_file
*dwo_file
,
6608 dwarf2_section_info
*section
, htab_t
&types_htab
,
6609 rcuh_kind section_kind
)
6611 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6612 struct dwarf2_section_info
*abbrev_section
;
6614 const gdb_byte
*info_ptr
, *end_ptr
;
6616 abbrev_section
= (dwo_file
!= NULL
6617 ? &dwo_file
->sections
.abbrev
6618 : &dwarf2_per_objfile
->abbrev
);
6620 if (dwarf_read_debug
)
6621 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6622 get_section_name (section
),
6623 get_section_file_name (abbrev_section
));
6625 dwarf2_read_section (objfile
, section
);
6626 info_ptr
= section
->buffer
;
6628 if (info_ptr
== NULL
)
6631 /* We can't set abfd until now because the section may be empty or
6632 not present, in which case the bfd is unknown. */
6633 abfd
= get_section_bfd_owner (section
);
6635 /* We don't use init_cutu_and_read_dies_simple, or some such, here
6636 because we don't need to read any dies: the signature is in the
6639 end_ptr
= info_ptr
+ section
->size
;
6640 while (info_ptr
< end_ptr
)
6642 struct signatured_type
*sig_type
;
6643 struct dwo_unit
*dwo_tu
;
6645 const gdb_byte
*ptr
= info_ptr
;
6646 struct comp_unit_head header
;
6647 unsigned int length
;
6649 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6651 /* Initialize it due to a false compiler warning. */
6652 header
.signature
= -1;
6653 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6655 /* We need to read the type's signature in order to build the hash
6656 table, but we don't need anything else just yet. */
6658 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6659 abbrev_section
, ptr
, section_kind
);
6661 length
= get_cu_length (&header
);
6663 /* Skip dummy type units. */
6664 if (ptr
>= info_ptr
+ length
6665 || peek_abbrev_code (abfd
, ptr
) == 0
6666 || header
.unit_type
!= DW_UT_type
)
6672 if (types_htab
== NULL
)
6675 types_htab
= allocate_dwo_unit_table (objfile
);
6677 types_htab
= allocate_signatured_type_table (objfile
);
6683 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6685 dwo_tu
->dwo_file
= dwo_file
;
6686 dwo_tu
->signature
= header
.signature
;
6687 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6688 dwo_tu
->section
= section
;
6689 dwo_tu
->sect_off
= sect_off
;
6690 dwo_tu
->length
= length
;
6694 /* N.B.: type_offset is not usable if this type uses a DWO file.
6695 The real type_offset is in the DWO file. */
6697 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6698 struct signatured_type
);
6699 sig_type
->signature
= header
.signature
;
6700 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6701 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6702 sig_type
->per_cu
.is_debug_types
= 1;
6703 sig_type
->per_cu
.section
= section
;
6704 sig_type
->per_cu
.sect_off
= sect_off
;
6705 sig_type
->per_cu
.length
= length
;
6708 slot
= htab_find_slot (types_htab
,
6709 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6711 gdb_assert (slot
!= NULL
);
6714 sect_offset dup_sect_off
;
6718 const struct dwo_unit
*dup_tu
6719 = (const struct dwo_unit
*) *slot
;
6721 dup_sect_off
= dup_tu
->sect_off
;
6725 const struct signatured_type
*dup_tu
6726 = (const struct signatured_type
*) *slot
;
6728 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6731 complaint (_("debug type entry at offset %s is duplicate to"
6732 " the entry at offset %s, signature %s"),
6733 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6734 hex_string (header
.signature
));
6736 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6738 if (dwarf_read_debug
> 1)
6739 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6740 sect_offset_str (sect_off
),
6741 hex_string (header
.signature
));
6747 /* Create the hash table of all entries in the .debug_types
6748 (or .debug_types.dwo) section(s).
6749 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6750 otherwise it is NULL.
6752 The result is a pointer to the hash table or NULL if there are no types.
6754 Note: This function processes DWO files only, not DWP files. */
6757 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6758 struct dwo_file
*dwo_file
,
6759 VEC (dwarf2_section_info_def
) *types
,
6763 struct dwarf2_section_info
*section
;
6765 if (VEC_empty (dwarf2_section_info_def
, types
))
6769 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
6771 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, section
,
6772 types_htab
, rcuh_kind::TYPE
);
6775 /* Create the hash table of all entries in the .debug_types section,
6776 and initialize all_type_units.
6777 The result is zero if there is an error (e.g. missing .debug_types section),
6778 otherwise non-zero. */
6781 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6783 htab_t types_htab
= NULL
;
6785 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6786 &dwarf2_per_objfile
->info
, types_htab
,
6787 rcuh_kind::COMPILE
);
6788 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6789 dwarf2_per_objfile
->types
, types_htab
);
6790 if (types_htab
== NULL
)
6792 dwarf2_per_objfile
->signatured_types
= NULL
;
6796 dwarf2_per_objfile
->signatured_types
= types_htab
;
6798 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
6799 dwarf2_per_objfile
->all_type_units
.reserve (htab_elements (types_htab
));
6801 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
,
6802 &dwarf2_per_objfile
->all_type_units
);
6807 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6808 If SLOT is non-NULL, it is the entry to use in the hash table.
6809 Otherwise we find one. */
6811 static struct signatured_type
*
6812 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6815 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6817 if (dwarf2_per_objfile
->all_type_units
.size ()
6818 == dwarf2_per_objfile
->all_type_units
.capacity ())
6819 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6821 signatured_type
*sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6822 struct signatured_type
);
6824 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
6825 sig_type
->signature
= sig
;
6826 sig_type
->per_cu
.is_debug_types
= 1;
6827 if (dwarf2_per_objfile
->using_index
)
6829 sig_type
->per_cu
.v
.quick
=
6830 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6831 struct dwarf2_per_cu_quick_data
);
6836 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6839 gdb_assert (*slot
== NULL
);
6841 /* The rest of sig_type must be filled in by the caller. */
6845 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6846 Fill in SIG_ENTRY with DWO_ENTRY. */
6849 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6850 struct signatured_type
*sig_entry
,
6851 struct dwo_unit
*dwo_entry
)
6853 /* Make sure we're not clobbering something we don't expect to. */
6854 gdb_assert (! sig_entry
->per_cu
.queued
);
6855 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6856 if (dwarf2_per_objfile
->using_index
)
6858 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6859 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6862 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6863 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6864 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6865 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6866 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6868 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6869 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6870 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6871 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6872 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6873 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6874 sig_entry
->dwo_unit
= dwo_entry
;
6877 /* Subroutine of lookup_signatured_type.
6878 If we haven't read the TU yet, create the signatured_type data structure
6879 for a TU to be read in directly from a DWO file, bypassing the stub.
6880 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6881 using .gdb_index, then when reading a CU we want to stay in the DWO file
6882 containing that CU. Otherwise we could end up reading several other DWO
6883 files (due to comdat folding) to process the transitive closure of all the
6884 mentioned TUs, and that can be slow. The current DWO file will have every
6885 type signature that it needs.
6886 We only do this for .gdb_index because in the psymtab case we already have
6887 to read all the DWOs to build the type unit groups. */
6889 static struct signatured_type
*
6890 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6892 struct dwarf2_per_objfile
*dwarf2_per_objfile
6893 = cu
->per_cu
->dwarf2_per_objfile
;
6894 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6895 struct dwo_file
*dwo_file
;
6896 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6897 struct signatured_type find_sig_entry
, *sig_entry
;
6900 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6902 /* If TU skeletons have been removed then we may not have read in any
6904 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6906 dwarf2_per_objfile
->signatured_types
6907 = allocate_signatured_type_table (objfile
);
6910 /* We only ever need to read in one copy of a signatured type.
6911 Use the global signatured_types array to do our own comdat-folding
6912 of types. If this is the first time we're reading this TU, and
6913 the TU has an entry in .gdb_index, replace the recorded data from
6914 .gdb_index with this TU. */
6916 find_sig_entry
.signature
= sig
;
6917 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6918 &find_sig_entry
, INSERT
);
6919 sig_entry
= (struct signatured_type
*) *slot
;
6921 /* We can get here with the TU already read, *or* in the process of being
6922 read. Don't reassign the global entry to point to this DWO if that's
6923 the case. Also note that if the TU is already being read, it may not
6924 have come from a DWO, the program may be a mix of Fission-compiled
6925 code and non-Fission-compiled code. */
6927 /* Have we already tried to read this TU?
6928 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6929 needn't exist in the global table yet). */
6930 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6933 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6934 dwo_unit of the TU itself. */
6935 dwo_file
= cu
->dwo_unit
->dwo_file
;
6937 /* Ok, this is the first time we're reading this TU. */
6938 if (dwo_file
->tus
== NULL
)
6940 find_dwo_entry
.signature
= sig
;
6941 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
6942 if (dwo_entry
== NULL
)
6945 /* If the global table doesn't have an entry for this TU, add one. */
6946 if (sig_entry
== NULL
)
6947 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6949 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6950 sig_entry
->per_cu
.tu_read
= 1;
6954 /* Subroutine of lookup_signatured_type.
6955 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6956 then try the DWP file. If the TU stub (skeleton) has been removed then
6957 it won't be in .gdb_index. */
6959 static struct signatured_type
*
6960 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6962 struct dwarf2_per_objfile
*dwarf2_per_objfile
6963 = cu
->per_cu
->dwarf2_per_objfile
;
6964 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6965 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
6966 struct dwo_unit
*dwo_entry
;
6967 struct signatured_type find_sig_entry
, *sig_entry
;
6970 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6971 gdb_assert (dwp_file
!= NULL
);
6973 /* If TU skeletons have been removed then we may not have read in any
6975 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6977 dwarf2_per_objfile
->signatured_types
6978 = allocate_signatured_type_table (objfile
);
6981 find_sig_entry
.signature
= sig
;
6982 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6983 &find_sig_entry
, INSERT
);
6984 sig_entry
= (struct signatured_type
*) *slot
;
6986 /* Have we already tried to read this TU?
6987 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6988 needn't exist in the global table yet). */
6989 if (sig_entry
!= NULL
)
6992 if (dwp_file
->tus
== NULL
)
6994 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
6995 sig
, 1 /* is_debug_types */);
6996 if (dwo_entry
== NULL
)
6999 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
7000 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7005 /* Lookup a signature based type for DW_FORM_ref_sig8.
7006 Returns NULL if signature SIG is not present in the table.
7007 It is up to the caller to complain about this. */
7009 static struct signatured_type
*
7010 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7012 struct dwarf2_per_objfile
*dwarf2_per_objfile
7013 = cu
->per_cu
->dwarf2_per_objfile
;
7016 && dwarf2_per_objfile
->using_index
)
7018 /* We're in a DWO/DWP file, and we're using .gdb_index.
7019 These cases require special processing. */
7020 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
7021 return lookup_dwo_signatured_type (cu
, sig
);
7023 return lookup_dwp_signatured_type (cu
, sig
);
7027 struct signatured_type find_entry
, *entry
;
7029 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7031 find_entry
.signature
= sig
;
7032 entry
= ((struct signatured_type
*)
7033 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
7038 /* Low level DIE reading support. */
7040 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
7043 init_cu_die_reader (struct die_reader_specs
*reader
,
7044 struct dwarf2_cu
*cu
,
7045 struct dwarf2_section_info
*section
,
7046 struct dwo_file
*dwo_file
,
7047 struct abbrev_table
*abbrev_table
)
7049 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
7050 reader
->abfd
= get_section_bfd_owner (section
);
7052 reader
->dwo_file
= dwo_file
;
7053 reader
->die_section
= section
;
7054 reader
->buffer
= section
->buffer
;
7055 reader
->buffer_end
= section
->buffer
+ section
->size
;
7056 reader
->comp_dir
= NULL
;
7057 reader
->abbrev_table
= abbrev_table
;
7060 /* Subroutine of init_cutu_and_read_dies to simplify it.
7061 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
7062 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
7065 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
7066 from it to the DIE in the DWO. If NULL we are skipping the stub.
7067 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
7068 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
7069 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
7070 STUB_COMP_DIR may be non-NULL.
7071 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
7072 are filled in with the info of the DIE from the DWO file.
7073 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
7074 from the dwo. Since *RESULT_READER references this abbrev table, it must be
7075 kept around for at least as long as *RESULT_READER.
7077 The result is non-zero if a valid (non-dummy) DIE was found. */
7080 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
7081 struct dwo_unit
*dwo_unit
,
7082 struct die_info
*stub_comp_unit_die
,
7083 const char *stub_comp_dir
,
7084 struct die_reader_specs
*result_reader
,
7085 const gdb_byte
**result_info_ptr
,
7086 struct die_info
**result_comp_unit_die
,
7087 int *result_has_children
,
7088 abbrev_table_up
*result_dwo_abbrev_table
)
7090 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7091 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7092 struct dwarf2_cu
*cu
= this_cu
->cu
;
7094 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7095 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
7096 int i
,num_extra_attrs
;
7097 struct dwarf2_section_info
*dwo_abbrev_section
;
7098 struct attribute
*attr
;
7099 struct die_info
*comp_unit_die
;
7101 /* At most one of these may be provided. */
7102 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
7104 /* These attributes aren't processed until later:
7105 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
7106 DW_AT_comp_dir is used now, to find the DWO file, but it is also
7107 referenced later. However, these attributes are found in the stub
7108 which we won't have later. In order to not impose this complication
7109 on the rest of the code, we read them here and copy them to the
7118 if (stub_comp_unit_die
!= NULL
)
7120 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
7122 if (! this_cu
->is_debug_types
)
7123 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
7124 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
7125 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
7126 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
7127 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
7129 /* There should be a DW_AT_addr_base attribute here (if needed).
7130 We need the value before we can process DW_FORM_GNU_addr_index. */
7132 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
7134 cu
->addr_base
= DW_UNSND (attr
);
7136 /* There should be a DW_AT_ranges_base attribute here (if needed).
7137 We need the value before we can process DW_AT_ranges. */
7138 cu
->ranges_base
= 0;
7139 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
7141 cu
->ranges_base
= DW_UNSND (attr
);
7143 else if (stub_comp_dir
!= NULL
)
7145 /* Reconstruct the comp_dir attribute to simplify the code below. */
7146 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
7147 comp_dir
->name
= DW_AT_comp_dir
;
7148 comp_dir
->form
= DW_FORM_string
;
7149 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
7150 DW_STRING (comp_dir
) = stub_comp_dir
;
7153 /* Set up for reading the DWO CU/TU. */
7154 cu
->dwo_unit
= dwo_unit
;
7155 dwarf2_section_info
*section
= dwo_unit
->section
;
7156 dwarf2_read_section (objfile
, section
);
7157 abfd
= get_section_bfd_owner (section
);
7158 begin_info_ptr
= info_ptr
= (section
->buffer
7159 + to_underlying (dwo_unit
->sect_off
));
7160 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
7162 if (this_cu
->is_debug_types
)
7164 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
7166 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7167 &cu
->header
, section
,
7169 info_ptr
, rcuh_kind::TYPE
);
7170 /* This is not an assert because it can be caused by bad debug info. */
7171 if (sig_type
->signature
!= cu
->header
.signature
)
7173 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
7174 " TU at offset %s [in module %s]"),
7175 hex_string (sig_type
->signature
),
7176 hex_string (cu
->header
.signature
),
7177 sect_offset_str (dwo_unit
->sect_off
),
7178 bfd_get_filename (abfd
));
7180 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7181 /* For DWOs coming from DWP files, we don't know the CU length
7182 nor the type's offset in the TU until now. */
7183 dwo_unit
->length
= get_cu_length (&cu
->header
);
7184 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
7186 /* Establish the type offset that can be used to lookup the type.
7187 For DWO files, we don't know it until now. */
7188 sig_type
->type_offset_in_section
7189 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
7193 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7194 &cu
->header
, section
,
7196 info_ptr
, rcuh_kind::COMPILE
);
7197 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7198 /* For DWOs coming from DWP files, we don't know the CU length
7200 dwo_unit
->length
= get_cu_length (&cu
->header
);
7203 *result_dwo_abbrev_table
7204 = abbrev_table_read_table (dwarf2_per_objfile
, dwo_abbrev_section
,
7205 cu
->header
.abbrev_sect_off
);
7206 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
7207 result_dwo_abbrev_table
->get ());
7209 /* Read in the die, but leave space to copy over the attributes
7210 from the stub. This has the benefit of simplifying the rest of
7211 the code - all the work to maintain the illusion of a single
7212 DW_TAG_{compile,type}_unit DIE is done here. */
7213 num_extra_attrs
= ((stmt_list
!= NULL
)
7217 + (comp_dir
!= NULL
));
7218 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
7219 result_has_children
, num_extra_attrs
);
7221 /* Copy over the attributes from the stub to the DIE we just read in. */
7222 comp_unit_die
= *result_comp_unit_die
;
7223 i
= comp_unit_die
->num_attrs
;
7224 if (stmt_list
!= NULL
)
7225 comp_unit_die
->attrs
[i
++] = *stmt_list
;
7227 comp_unit_die
->attrs
[i
++] = *low_pc
;
7228 if (high_pc
!= NULL
)
7229 comp_unit_die
->attrs
[i
++] = *high_pc
;
7231 comp_unit_die
->attrs
[i
++] = *ranges
;
7232 if (comp_dir
!= NULL
)
7233 comp_unit_die
->attrs
[i
++] = *comp_dir
;
7234 comp_unit_die
->num_attrs
+= num_extra_attrs
;
7236 if (dwarf_die_debug
)
7238 fprintf_unfiltered (gdb_stdlog
,
7239 "Read die from %s@0x%x of %s:\n",
7240 get_section_name (section
),
7241 (unsigned) (begin_info_ptr
- section
->buffer
),
7242 bfd_get_filename (abfd
));
7243 dump_die (comp_unit_die
, dwarf_die_debug
);
7246 /* Save the comp_dir attribute. If there is no DWP file then we'll read
7247 TUs by skipping the stub and going directly to the entry in the DWO file.
7248 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
7249 to get it via circuitous means. Blech. */
7250 if (comp_dir
!= NULL
)
7251 result_reader
->comp_dir
= DW_STRING (comp_dir
);
7253 /* Skip dummy compilation units. */
7254 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
7255 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7258 *result_info_ptr
= info_ptr
;
7262 /* Subroutine of init_cutu_and_read_dies to simplify it.
7263 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
7264 Returns NULL if the specified DWO unit cannot be found. */
7266 static struct dwo_unit
*
7267 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
7268 struct die_info
*comp_unit_die
)
7270 struct dwarf2_cu
*cu
= this_cu
->cu
;
7272 struct dwo_unit
*dwo_unit
;
7273 const char *comp_dir
, *dwo_name
;
7275 gdb_assert (cu
!= NULL
);
7277 /* Yeah, we look dwo_name up again, but it simplifies the code. */
7278 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7279 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7281 if (this_cu
->is_debug_types
)
7283 struct signatured_type
*sig_type
;
7285 /* Since this_cu is the first member of struct signatured_type,
7286 we can go from a pointer to one to a pointer to the other. */
7287 sig_type
= (struct signatured_type
*) this_cu
;
7288 signature
= sig_type
->signature
;
7289 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
7293 struct attribute
*attr
;
7295 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
7297 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
7299 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
7300 signature
= DW_UNSND (attr
);
7301 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
7308 /* Subroutine of init_cutu_and_read_dies to simplify it.
7309 See it for a description of the parameters.
7310 Read a TU directly from a DWO file, bypassing the stub. */
7313 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
7314 int use_existing_cu
, int keep
,
7315 die_reader_func_ftype
*die_reader_func
,
7318 std::unique_ptr
<dwarf2_cu
> new_cu
;
7319 struct signatured_type
*sig_type
;
7320 struct die_reader_specs reader
;
7321 const gdb_byte
*info_ptr
;
7322 struct die_info
*comp_unit_die
;
7324 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7326 /* Verify we can do the following downcast, and that we have the
7328 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
7329 sig_type
= (struct signatured_type
*) this_cu
;
7330 gdb_assert (sig_type
->dwo_unit
!= NULL
);
7332 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7334 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
7335 /* There's no need to do the rereading_dwo_cu handling that
7336 init_cutu_and_read_dies does since we don't read the stub. */
7340 /* If !use_existing_cu, this_cu->cu must be NULL. */
7341 gdb_assert (this_cu
->cu
== NULL
);
7342 new_cu
.reset (new dwarf2_cu (this_cu
));
7345 /* A future optimization, if needed, would be to use an existing
7346 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
7347 could share abbrev tables. */
7349 /* The abbreviation table used by READER, this must live at least as long as
7351 abbrev_table_up dwo_abbrev_table
;
7353 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
7354 NULL
/* stub_comp_unit_die */,
7355 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
7357 &comp_unit_die
, &has_children
,
7358 &dwo_abbrev_table
) == 0)
7364 /* All the "real" work is done here. */
7365 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7367 /* This duplicates the code in init_cutu_and_read_dies,
7368 but the alternative is making the latter more complex.
7369 This function is only for the special case of using DWO files directly:
7370 no point in overly complicating the general case just to handle this. */
7371 if (new_cu
!= NULL
&& keep
)
7373 /* Link this CU into read_in_chain. */
7374 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7375 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7376 /* The chain owns it now. */
7381 /* Initialize a CU (or TU) and read its DIEs.
7382 If the CU defers to a DWO file, read the DWO file as well.
7384 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
7385 Otherwise the table specified in the comp unit header is read in and used.
7386 This is an optimization for when we already have the abbrev table.
7388 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
7389 Otherwise, a new CU is allocated with xmalloc.
7391 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
7392 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
7394 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7395 linker) then DIE_READER_FUNC will not get called. */
7398 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
7399 struct abbrev_table
*abbrev_table
,
7400 int use_existing_cu
, int keep
,
7402 die_reader_func_ftype
*die_reader_func
,
7405 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7406 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7407 struct dwarf2_section_info
*section
= this_cu
->section
;
7408 bfd
*abfd
= get_section_bfd_owner (section
);
7409 struct dwarf2_cu
*cu
;
7410 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7411 struct die_reader_specs reader
;
7412 struct die_info
*comp_unit_die
;
7414 struct attribute
*attr
;
7415 struct signatured_type
*sig_type
= NULL
;
7416 struct dwarf2_section_info
*abbrev_section
;
7417 /* Non-zero if CU currently points to a DWO file and we need to
7418 reread it. When this happens we need to reread the skeleton die
7419 before we can reread the DWO file (this only applies to CUs, not TUs). */
7420 int rereading_dwo_cu
= 0;
7422 if (dwarf_die_debug
)
7423 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7424 this_cu
->is_debug_types
? "type" : "comp",
7425 sect_offset_str (this_cu
->sect_off
));
7427 if (use_existing_cu
)
7430 /* If we're reading a TU directly from a DWO file, including a virtual DWO
7431 file (instead of going through the stub), short-circuit all of this. */
7432 if (this_cu
->reading_dwo_directly
)
7434 /* Narrow down the scope of possibilities to have to understand. */
7435 gdb_assert (this_cu
->is_debug_types
);
7436 gdb_assert (abbrev_table
== NULL
);
7437 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
7438 die_reader_func
, data
);
7442 /* This is cheap if the section is already read in. */
7443 dwarf2_read_section (objfile
, section
);
7445 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7447 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
7449 std::unique_ptr
<dwarf2_cu
> new_cu
;
7450 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7453 /* If this CU is from a DWO file we need to start over, we need to
7454 refetch the attributes from the skeleton CU.
7455 This could be optimized by retrieving those attributes from when we
7456 were here the first time: the previous comp_unit_die was stored in
7457 comp_unit_obstack. But there's no data yet that we need this
7459 if (cu
->dwo_unit
!= NULL
)
7460 rereading_dwo_cu
= 1;
7464 /* If !use_existing_cu, this_cu->cu must be NULL. */
7465 gdb_assert (this_cu
->cu
== NULL
);
7466 new_cu
.reset (new dwarf2_cu (this_cu
));
7470 /* Get the header. */
7471 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7473 /* We already have the header, there's no need to read it in again. */
7474 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7478 if (this_cu
->is_debug_types
)
7480 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7481 &cu
->header
, section
,
7482 abbrev_section
, info_ptr
,
7485 /* Since per_cu is the first member of struct signatured_type,
7486 we can go from a pointer to one to a pointer to the other. */
7487 sig_type
= (struct signatured_type
*) this_cu
;
7488 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7489 gdb_assert (sig_type
->type_offset_in_tu
7490 == cu
->header
.type_cu_offset_in_tu
);
7491 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7493 /* LENGTH has not been set yet for type units if we're
7494 using .gdb_index. */
7495 this_cu
->length
= get_cu_length (&cu
->header
);
7497 /* Establish the type offset that can be used to lookup the type. */
7498 sig_type
->type_offset_in_section
=
7499 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7501 this_cu
->dwarf_version
= cu
->header
.version
;
7505 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7506 &cu
->header
, section
,
7509 rcuh_kind::COMPILE
);
7511 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7512 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
7513 this_cu
->dwarf_version
= cu
->header
.version
;
7517 /* Skip dummy compilation units. */
7518 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7519 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7522 /* If we don't have them yet, read the abbrevs for this compilation unit.
7523 And if we need to read them now, make sure they're freed when we're
7524 done (own the table through ABBREV_TABLE_HOLDER). */
7525 abbrev_table_up abbrev_table_holder
;
7526 if (abbrev_table
!= NULL
)
7527 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7531 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7532 cu
->header
.abbrev_sect_off
);
7533 abbrev_table
= abbrev_table_holder
.get ();
7536 /* Read the top level CU/TU die. */
7537 init_cu_die_reader (&reader
, cu
, section
, NULL
, abbrev_table
);
7538 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7540 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
7543 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7544 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7545 table from the DWO file and pass the ownership over to us. It will be
7546 referenced from READER, so we must make sure to free it after we're done
7549 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7550 DWO CU, that this test will fail (the attribute will not be present). */
7551 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7552 abbrev_table_up dwo_abbrev_table
;
7555 struct dwo_unit
*dwo_unit
;
7556 struct die_info
*dwo_comp_unit_die
;
7560 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
7561 " has children (offset %s) [in module %s]"),
7562 sect_offset_str (this_cu
->sect_off
),
7563 bfd_get_filename (abfd
));
7565 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
7566 if (dwo_unit
!= NULL
)
7568 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
7569 comp_unit_die
, NULL
,
7571 &dwo_comp_unit_die
, &has_children
,
7572 &dwo_abbrev_table
) == 0)
7577 comp_unit_die
= dwo_comp_unit_die
;
7581 /* Yikes, we couldn't find the rest of the DIE, we only have
7582 the stub. A complaint has already been logged. There's
7583 not much more we can do except pass on the stub DIE to
7584 die_reader_func. We don't want to throw an error on bad
7589 /* All of the above is setup for this call. Yikes. */
7590 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7592 /* Done, clean up. */
7593 if (new_cu
!= NULL
&& keep
)
7595 /* Link this CU into read_in_chain. */
7596 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7597 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7598 /* The chain owns it now. */
7603 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
7604 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
7605 to have already done the lookup to find the DWO file).
7607 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7608 THIS_CU->is_debug_types, but nothing else.
7610 We fill in THIS_CU->length.
7612 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7613 linker) then DIE_READER_FUNC will not get called.
7615 THIS_CU->cu is always freed when done.
7616 This is done in order to not leave THIS_CU->cu in a state where we have
7617 to care whether it refers to the "main" CU or the DWO CU. */
7620 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
7621 struct dwo_file
*dwo_file
,
7622 die_reader_func_ftype
*die_reader_func
,
7625 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7626 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7627 struct dwarf2_section_info
*section
= this_cu
->section
;
7628 bfd
*abfd
= get_section_bfd_owner (section
);
7629 struct dwarf2_section_info
*abbrev_section
;
7630 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7631 struct die_reader_specs reader
;
7632 struct die_info
*comp_unit_die
;
7635 if (dwarf_die_debug
)
7636 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7637 this_cu
->is_debug_types
? "type" : "comp",
7638 sect_offset_str (this_cu
->sect_off
));
7640 gdb_assert (this_cu
->cu
== NULL
);
7642 abbrev_section
= (dwo_file
!= NULL
7643 ? &dwo_file
->sections
.abbrev
7644 : get_abbrev_section_for_cu (this_cu
));
7646 /* This is cheap if the section is already read in. */
7647 dwarf2_read_section (objfile
, section
);
7649 struct dwarf2_cu
cu (this_cu
);
7651 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7652 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7653 &cu
.header
, section
,
7654 abbrev_section
, info_ptr
,
7655 (this_cu
->is_debug_types
7657 : rcuh_kind::COMPILE
));
7659 this_cu
->length
= get_cu_length (&cu
.header
);
7661 /* Skip dummy compilation units. */
7662 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7663 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7666 abbrev_table_up abbrev_table
7667 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7668 cu
.header
.abbrev_sect_off
);
7670 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
, abbrev_table
.get ());
7671 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7673 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7676 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
7677 does not lookup the specified DWO file.
7678 This cannot be used to read DWO files.
7680 THIS_CU->cu is always freed when done.
7681 This is done in order to not leave THIS_CU->cu in a state where we have
7682 to care whether it refers to the "main" CU or the DWO CU.
7683 We can revisit this if the data shows there's a performance issue. */
7686 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
7687 die_reader_func_ftype
*die_reader_func
,
7690 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
7693 /* Type Unit Groups.
7695 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7696 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7697 so that all types coming from the same compilation (.o file) are grouped
7698 together. A future step could be to put the types in the same symtab as
7699 the CU the types ultimately came from. */
7702 hash_type_unit_group (const void *item
)
7704 const struct type_unit_group
*tu_group
7705 = (const struct type_unit_group
*) item
;
7707 return hash_stmt_list_entry (&tu_group
->hash
);
7711 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7713 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7714 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7716 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7719 /* Allocate a hash table for type unit groups. */
7722 allocate_type_unit_groups_table (struct objfile
*objfile
)
7724 return htab_create_alloc_ex (3,
7725 hash_type_unit_group
,
7728 &objfile
->objfile_obstack
,
7729 hashtab_obstack_allocate
,
7730 dummy_obstack_deallocate
);
7733 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7734 partial symtabs. We combine several TUs per psymtab to not let the size
7735 of any one psymtab grow too big. */
7736 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7737 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7739 /* Helper routine for get_type_unit_group.
7740 Create the type_unit_group object used to hold one or more TUs. */
7742 static struct type_unit_group
*
7743 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7745 struct dwarf2_per_objfile
*dwarf2_per_objfile
7746 = cu
->per_cu
->dwarf2_per_objfile
;
7747 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7748 struct dwarf2_per_cu_data
*per_cu
;
7749 struct type_unit_group
*tu_group
;
7751 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7752 struct type_unit_group
);
7753 per_cu
= &tu_group
->per_cu
;
7754 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7756 if (dwarf2_per_objfile
->using_index
)
7758 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7759 struct dwarf2_per_cu_quick_data
);
7763 unsigned int line_offset
= to_underlying (line_offset_struct
);
7764 struct partial_symtab
*pst
;
7767 /* Give the symtab a useful name for debug purposes. */
7768 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7769 name
= xstrprintf ("<type_units_%d>",
7770 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7772 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
7774 pst
= create_partial_symtab (per_cu
, name
);
7780 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7781 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7786 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7787 STMT_LIST is a DW_AT_stmt_list attribute. */
7789 static struct type_unit_group
*
7790 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7792 struct dwarf2_per_objfile
*dwarf2_per_objfile
7793 = cu
->per_cu
->dwarf2_per_objfile
;
7794 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7795 struct type_unit_group
*tu_group
;
7797 unsigned int line_offset
;
7798 struct type_unit_group type_unit_group_for_lookup
;
7800 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7802 dwarf2_per_objfile
->type_unit_groups
=
7803 allocate_type_unit_groups_table (dwarf2_per_objfile
->objfile
);
7806 /* Do we need to create a new group, or can we use an existing one? */
7810 line_offset
= DW_UNSND (stmt_list
);
7811 ++tu_stats
->nr_symtab_sharers
;
7815 /* Ugh, no stmt_list. Rare, but we have to handle it.
7816 We can do various things here like create one group per TU or
7817 spread them over multiple groups to split up the expansion work.
7818 To avoid worst case scenarios (too many groups or too large groups)
7819 we, umm, group them in bunches. */
7820 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7821 | (tu_stats
->nr_stmt_less_type_units
7822 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7823 ++tu_stats
->nr_stmt_less_type_units
;
7826 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7827 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7828 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
7829 &type_unit_group_for_lookup
, INSERT
);
7832 tu_group
= (struct type_unit_group
*) *slot
;
7833 gdb_assert (tu_group
!= NULL
);
7837 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7838 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7840 ++tu_stats
->nr_symtabs
;
7846 /* Partial symbol tables. */
7848 /* Create a psymtab named NAME and assign it to PER_CU.
7850 The caller must fill in the following details:
7851 dirname, textlow, texthigh. */
7853 static struct partial_symtab
*
7854 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7856 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7857 struct partial_symtab
*pst
;
7859 pst
= start_psymtab_common (objfile
, name
, 0,
7860 objfile
->global_psymbols
,
7861 objfile
->static_psymbols
);
7863 pst
->psymtabs_addrmap_supported
= 1;
7865 /* This is the glue that links PST into GDB's symbol API. */
7866 pst
->read_symtab_private
= per_cu
;
7867 pst
->read_symtab
= dwarf2_read_symtab
;
7868 per_cu
->v
.psymtab
= pst
;
7873 /* The DATA object passed to process_psymtab_comp_unit_reader has this
7876 struct process_psymtab_comp_unit_data
7878 /* True if we are reading a DW_TAG_partial_unit. */
7880 int want_partial_unit
;
7882 /* The "pretend" language that is used if the CU doesn't declare a
7885 enum language pretend_language
;
7888 /* die_reader_func for process_psymtab_comp_unit. */
7891 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7892 const gdb_byte
*info_ptr
,
7893 struct die_info
*comp_unit_die
,
7897 struct dwarf2_cu
*cu
= reader
->cu
;
7898 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7899 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7900 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7902 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7903 struct partial_symtab
*pst
;
7904 enum pc_bounds_kind cu_bounds_kind
;
7905 const char *filename
;
7906 struct process_psymtab_comp_unit_data
*info
7907 = (struct process_psymtab_comp_unit_data
*) data
;
7909 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
7912 gdb_assert (! per_cu
->is_debug_types
);
7914 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
7916 /* Allocate a new partial symbol table structure. */
7917 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7918 if (filename
== NULL
)
7921 pst
= create_partial_symtab (per_cu
, filename
);
7923 /* This must be done before calling dwarf2_build_include_psymtabs. */
7924 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7926 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7928 dwarf2_find_base_address (comp_unit_die
, cu
);
7930 /* Possibly set the default values of LOWPC and HIGHPC from
7932 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7933 &best_highpc
, cu
, pst
);
7934 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7935 /* Store the contiguous range if it is not empty; it can be empty for
7936 CUs with no code. */
7937 addrmap_set_empty (objfile
->psymtabs_addrmap
,
7938 gdbarch_adjust_dwarf2_addr (gdbarch
,
7939 best_lowpc
+ baseaddr
),
7940 gdbarch_adjust_dwarf2_addr (gdbarch
,
7941 best_highpc
+ baseaddr
) - 1,
7944 /* Check if comp unit has_children.
7945 If so, read the rest of the partial symbols from this comp unit.
7946 If not, there's no more debug_info for this comp unit. */
7949 struct partial_die_info
*first_die
;
7950 CORE_ADDR lowpc
, highpc
;
7952 lowpc
= ((CORE_ADDR
) -1);
7953 highpc
= ((CORE_ADDR
) 0);
7955 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7957 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7958 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7960 /* If we didn't find a lowpc, set it to highpc to avoid
7961 complaints from `maint check'. */
7962 if (lowpc
== ((CORE_ADDR
) -1))
7965 /* If the compilation unit didn't have an explicit address range,
7966 then use the information extracted from its child dies. */
7967 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7970 best_highpc
= highpc
;
7973 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
7974 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
7976 end_psymtab_common (objfile
, pst
);
7978 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
7981 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
7982 struct dwarf2_per_cu_data
*iter
;
7984 /* Fill in 'dependencies' here; we fill in 'users' in a
7986 pst
->number_of_dependencies
= len
;
7988 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
7990 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
7993 pst
->dependencies
[i
] = iter
->v
.psymtab
;
7995 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
7998 /* Get the list of files included in the current compilation unit,
7999 and build a psymtab for each of them. */
8000 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
8002 if (dwarf_read_debug
)
8004 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8006 fprintf_unfiltered (gdb_stdlog
,
8007 "Psymtab for %s unit @%s: %s - %s"
8008 ", %d global, %d static syms\n",
8009 per_cu
->is_debug_types
? "type" : "comp",
8010 sect_offset_str (per_cu
->sect_off
),
8011 paddress (gdbarch
, pst
->textlow
),
8012 paddress (gdbarch
, pst
->texthigh
),
8013 pst
->n_global_syms
, pst
->n_static_syms
);
8017 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8018 Process compilation unit THIS_CU for a psymtab. */
8021 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8022 int want_partial_unit
,
8023 enum language pretend_language
)
8025 /* If this compilation unit was already read in, free the
8026 cached copy in order to read it in again. This is
8027 necessary because we skipped some symbols when we first
8028 read in the compilation unit (see load_partial_dies).
8029 This problem could be avoided, but the benefit is unclear. */
8030 if (this_cu
->cu
!= NULL
)
8031 free_one_cached_comp_unit (this_cu
);
8033 if (this_cu
->is_debug_types
)
8034 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, false,
8035 build_type_psymtabs_reader
, NULL
);
8038 process_psymtab_comp_unit_data info
;
8039 info
.want_partial_unit
= want_partial_unit
;
8040 info
.pretend_language
= pretend_language
;
8041 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, false,
8042 process_psymtab_comp_unit_reader
, &info
);
8045 /* Age out any secondary CUs. */
8046 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
8049 /* Reader function for build_type_psymtabs. */
8052 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
8053 const gdb_byte
*info_ptr
,
8054 struct die_info
*type_unit_die
,
8058 struct dwarf2_per_objfile
*dwarf2_per_objfile
8059 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
8060 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8061 struct dwarf2_cu
*cu
= reader
->cu
;
8062 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8063 struct signatured_type
*sig_type
;
8064 struct type_unit_group
*tu_group
;
8065 struct attribute
*attr
;
8066 struct partial_die_info
*first_die
;
8067 CORE_ADDR lowpc
, highpc
;
8068 struct partial_symtab
*pst
;
8070 gdb_assert (data
== NULL
);
8071 gdb_assert (per_cu
->is_debug_types
);
8072 sig_type
= (struct signatured_type
*) per_cu
;
8077 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
8078 tu_group
= get_type_unit_group (cu
, attr
);
8080 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
8082 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
8083 pst
= create_partial_symtab (per_cu
, "");
8086 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8088 lowpc
= (CORE_ADDR
) -1;
8089 highpc
= (CORE_ADDR
) 0;
8090 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
8092 end_psymtab_common (objfile
, pst
);
8095 /* Struct used to sort TUs by their abbreviation table offset. */
8097 struct tu_abbrev_offset
8099 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
8100 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
8103 signatured_type
*sig_type
;
8104 sect_offset abbrev_offset
;
8107 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
8110 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
8111 const struct tu_abbrev_offset
&b
)
8113 return a
.abbrev_offset
< b
.abbrev_offset
;
8116 /* Efficiently read all the type units.
8117 This does the bulk of the work for build_type_psymtabs.
8119 The efficiency is because we sort TUs by the abbrev table they use and
8120 only read each abbrev table once. In one program there are 200K TUs
8121 sharing 8K abbrev tables.
8123 The main purpose of this function is to support building the
8124 dwarf2_per_objfile->type_unit_groups table.
8125 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
8126 can collapse the search space by grouping them by stmt_list.
8127 The savings can be significant, in the same program from above the 200K TUs
8128 share 8K stmt_list tables.
8130 FUNC is expected to call get_type_unit_group, which will create the
8131 struct type_unit_group if necessary and add it to
8132 dwarf2_per_objfile->type_unit_groups. */
8135 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8137 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8138 abbrev_table_up abbrev_table
;
8139 sect_offset abbrev_offset
;
8141 /* It's up to the caller to not call us multiple times. */
8142 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
8144 if (dwarf2_per_objfile
->all_type_units
.empty ())
8147 /* TUs typically share abbrev tables, and there can be way more TUs than
8148 abbrev tables. Sort by abbrev table to reduce the number of times we
8149 read each abbrev table in.
8150 Alternatives are to punt or to maintain a cache of abbrev tables.
8151 This is simpler and efficient enough for now.
8153 Later we group TUs by their DW_AT_stmt_list value (as this defines the
8154 symtab to use). Typically TUs with the same abbrev offset have the same
8155 stmt_list value too so in practice this should work well.
8157 The basic algorithm here is:
8159 sort TUs by abbrev table
8160 for each TU with same abbrev table:
8161 read abbrev table if first user
8162 read TU top level DIE
8163 [IWBN if DWO skeletons had DW_AT_stmt_list]
8166 if (dwarf_read_debug
)
8167 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
8169 /* Sort in a separate table to maintain the order of all_type_units
8170 for .gdb_index: TU indices directly index all_type_units. */
8171 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
8172 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->all_type_units
.size ());
8174 for (signatured_type
*sig_type
: dwarf2_per_objfile
->all_type_units
)
8175 sorted_by_abbrev
.emplace_back
8176 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
8177 sig_type
->per_cu
.section
,
8178 sig_type
->per_cu
.sect_off
));
8180 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
8181 sort_tu_by_abbrev_offset
);
8183 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
8185 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
8187 /* Switch to the next abbrev table if necessary. */
8188 if (abbrev_table
== NULL
8189 || tu
.abbrev_offset
!= abbrev_offset
)
8191 abbrev_offset
= tu
.abbrev_offset
;
8193 abbrev_table_read_table (dwarf2_per_objfile
,
8194 &dwarf2_per_objfile
->abbrev
,
8196 ++tu_stats
->nr_uniq_abbrev_tables
;
8199 init_cutu_and_read_dies (&tu
.sig_type
->per_cu
, abbrev_table
.get (),
8200 0, 0, false, build_type_psymtabs_reader
, NULL
);
8204 /* Print collected type unit statistics. */
8207 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8209 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8211 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
8212 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
8213 dwarf2_per_objfile
->all_type_units
.size ());
8214 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
8215 tu_stats
->nr_uniq_abbrev_tables
);
8216 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
8217 tu_stats
->nr_symtabs
);
8218 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
8219 tu_stats
->nr_symtab_sharers
);
8220 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
8221 tu_stats
->nr_stmt_less_type_units
);
8222 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
8223 tu_stats
->nr_all_type_units_reallocs
);
8226 /* Traversal function for build_type_psymtabs. */
8229 build_type_psymtab_dependencies (void **slot
, void *info
)
8231 struct dwarf2_per_objfile
*dwarf2_per_objfile
8232 = (struct dwarf2_per_objfile
*) info
;
8233 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8234 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
8235 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
8236 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8237 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
8238 struct signatured_type
*iter
;
8241 gdb_assert (len
> 0);
8242 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
8244 pst
->number_of_dependencies
= len
;
8246 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
8248 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
8251 gdb_assert (iter
->per_cu
.is_debug_types
);
8252 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
8253 iter
->type_unit_group
= tu_group
;
8256 VEC_free (sig_type_ptr
, tu_group
->tus
);
8261 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8262 Build partial symbol tables for the .debug_types comp-units. */
8265 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8267 if (! create_all_type_units (dwarf2_per_objfile
))
8270 build_type_psymtabs_1 (dwarf2_per_objfile
);
8273 /* Traversal function for process_skeletonless_type_unit.
8274 Read a TU in a DWO file and build partial symbols for it. */
8277 process_skeletonless_type_unit (void **slot
, void *info
)
8279 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
8280 struct dwarf2_per_objfile
*dwarf2_per_objfile
8281 = (struct dwarf2_per_objfile
*) info
;
8282 struct signatured_type find_entry
, *entry
;
8284 /* If this TU doesn't exist in the global table, add it and read it in. */
8286 if (dwarf2_per_objfile
->signatured_types
== NULL
)
8288 dwarf2_per_objfile
->signatured_types
8289 = allocate_signatured_type_table (dwarf2_per_objfile
->objfile
);
8292 find_entry
.signature
= dwo_unit
->signature
;
8293 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
8295 /* If we've already seen this type there's nothing to do. What's happening
8296 is we're doing our own version of comdat-folding here. */
8300 /* This does the job that create_all_type_units would have done for
8302 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
8303 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
8306 /* This does the job that build_type_psymtabs_1 would have done. */
8307 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0, false,
8308 build_type_psymtabs_reader
, NULL
);
8313 /* Traversal function for process_skeletonless_type_units. */
8316 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
8318 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
8320 if (dwo_file
->tus
!= NULL
)
8322 htab_traverse_noresize (dwo_file
->tus
,
8323 process_skeletonless_type_unit
, info
);
8329 /* Scan all TUs of DWO files, verifying we've processed them.
8330 This is needed in case a TU was emitted without its skeleton.
8331 Note: This can't be done until we know what all the DWO files are. */
8334 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8336 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
8337 if (get_dwp_file (dwarf2_per_objfile
) == NULL
8338 && dwarf2_per_objfile
->dwo_files
!= NULL
)
8340 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
8341 process_dwo_file_for_skeletonless_type_units
,
8342 dwarf2_per_objfile
);
8346 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
8349 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8351 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8353 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8358 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
8360 /* Set the 'user' field only if it is not already set. */
8361 if (pst
->dependencies
[j
]->user
== NULL
)
8362 pst
->dependencies
[j
]->user
= pst
;
8367 /* Build the partial symbol table by doing a quick pass through the
8368 .debug_info and .debug_abbrev sections. */
8371 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8373 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8375 if (dwarf_read_debug
)
8377 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
8378 objfile_name (objfile
));
8381 dwarf2_per_objfile
->reading_partial_symbols
= 1;
8383 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
8385 /* Any cached compilation units will be linked by the per-objfile
8386 read_in_chain. Make sure to free them when we're done. */
8387 free_cached_comp_units
freer (dwarf2_per_objfile
);
8389 build_type_psymtabs (dwarf2_per_objfile
);
8391 create_all_comp_units (dwarf2_per_objfile
);
8393 /* Create a temporary address map on a temporary obstack. We later
8394 copy this to the final obstack. */
8395 auto_obstack temp_obstack
;
8397 scoped_restore save_psymtabs_addrmap
8398 = make_scoped_restore (&objfile
->psymtabs_addrmap
,
8399 addrmap_create_mutable (&temp_obstack
));
8401 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8402 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
8404 /* This has to wait until we read the CUs, we need the list of DWOs. */
8405 process_skeletonless_type_units (dwarf2_per_objfile
);
8407 /* Now that all TUs have been processed we can fill in the dependencies. */
8408 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
8410 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
8411 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
8414 if (dwarf_read_debug
)
8415 print_tu_stats (dwarf2_per_objfile
);
8417 set_partial_user (dwarf2_per_objfile
);
8419 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
8420 &objfile
->objfile_obstack
);
8421 /* At this point we want to keep the address map. */
8422 save_psymtabs_addrmap
.release ();
8424 if (dwarf_read_debug
)
8425 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
8426 objfile_name (objfile
));
8429 /* die_reader_func for load_partial_comp_unit. */
8432 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
8433 const gdb_byte
*info_ptr
,
8434 struct die_info
*comp_unit_die
,
8438 struct dwarf2_cu
*cu
= reader
->cu
;
8440 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
8442 /* Check if comp unit has_children.
8443 If so, read the rest of the partial symbols from this comp unit.
8444 If not, there's no more debug_info for this comp unit. */
8446 load_partial_dies (reader
, info_ptr
, 0);
8449 /* Load the partial DIEs for a secondary CU into memory.
8450 This is also used when rereading a primary CU with load_all_dies. */
8453 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
8455 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1, false,
8456 load_partial_comp_unit_reader
, NULL
);
8460 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
8461 struct dwarf2_section_info
*section
,
8462 struct dwarf2_section_info
*abbrev_section
,
8463 unsigned int is_dwz
)
8465 const gdb_byte
*info_ptr
;
8466 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8468 if (dwarf_read_debug
)
8469 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
8470 get_section_name (section
),
8471 get_section_file_name (section
));
8473 dwarf2_read_section (objfile
, section
);
8475 info_ptr
= section
->buffer
;
8477 while (info_ptr
< section
->buffer
+ section
->size
)
8479 struct dwarf2_per_cu_data
*this_cu
;
8481 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
8483 comp_unit_head cu_header
;
8484 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
8485 abbrev_section
, info_ptr
,
8486 rcuh_kind::COMPILE
);
8488 /* Save the compilation unit for later lookup. */
8489 if (cu_header
.unit_type
!= DW_UT_type
)
8491 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
8492 struct dwarf2_per_cu_data
);
8493 memset (this_cu
, 0, sizeof (*this_cu
));
8497 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
8498 struct signatured_type
);
8499 memset (sig_type
, 0, sizeof (*sig_type
));
8500 sig_type
->signature
= cu_header
.signature
;
8501 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
8502 this_cu
= &sig_type
->per_cu
;
8504 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
8505 this_cu
->sect_off
= sect_off
;
8506 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
8507 this_cu
->is_dwz
= is_dwz
;
8508 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
8509 this_cu
->section
= section
;
8511 dwarf2_per_objfile
->all_comp_units
.push_back (this_cu
);
8513 info_ptr
= info_ptr
+ this_cu
->length
;
8517 /* Create a list of all compilation units in OBJFILE.
8518 This is only done for -readnow and building partial symtabs. */
8521 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8523 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
8524 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
8525 &dwarf2_per_objfile
->abbrev
, 0);
8527 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
8529 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
8533 /* Process all loaded DIEs for compilation unit CU, starting at
8534 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8535 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8536 DW_AT_ranges). See the comments of add_partial_subprogram on how
8537 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8540 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8541 CORE_ADDR
*highpc
, int set_addrmap
,
8542 struct dwarf2_cu
*cu
)
8544 struct partial_die_info
*pdi
;
8546 /* Now, march along the PDI's, descending into ones which have
8547 interesting children but skipping the children of the other ones,
8548 until we reach the end of the compilation unit. */
8556 /* Anonymous namespaces or modules have no name but have interesting
8557 children, so we need to look at them. Ditto for anonymous
8560 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8561 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8562 || pdi
->tag
== DW_TAG_imported_unit
8563 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8567 case DW_TAG_subprogram
:
8568 case DW_TAG_inlined_subroutine
:
8569 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8571 case DW_TAG_constant
:
8572 case DW_TAG_variable
:
8573 case DW_TAG_typedef
:
8574 case DW_TAG_union_type
:
8575 if (!pdi
->is_declaration
)
8577 add_partial_symbol (pdi
, cu
);
8580 case DW_TAG_class_type
:
8581 case DW_TAG_interface_type
:
8582 case DW_TAG_structure_type
:
8583 if (!pdi
->is_declaration
)
8585 add_partial_symbol (pdi
, cu
);
8587 if ((cu
->language
== language_rust
8588 || cu
->language
== language_cplus
) && pdi
->has_children
)
8589 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8592 case DW_TAG_enumeration_type
:
8593 if (!pdi
->is_declaration
)
8594 add_partial_enumeration (pdi
, cu
);
8596 case DW_TAG_base_type
:
8597 case DW_TAG_subrange_type
:
8598 /* File scope base type definitions are added to the partial
8600 add_partial_symbol (pdi
, cu
);
8602 case DW_TAG_namespace
:
8603 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8606 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8608 case DW_TAG_imported_unit
:
8610 struct dwarf2_per_cu_data
*per_cu
;
8612 /* For now we don't handle imported units in type units. */
8613 if (cu
->per_cu
->is_debug_types
)
8615 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8616 " supported in type units [in module %s]"),
8617 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8620 per_cu
= dwarf2_find_containing_comp_unit
8621 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8622 cu
->per_cu
->dwarf2_per_objfile
);
8624 /* Go read the partial unit, if needed. */
8625 if (per_cu
->v
.psymtab
== NULL
)
8626 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
8628 VEC_safe_push (dwarf2_per_cu_ptr
,
8629 cu
->per_cu
->imported_symtabs
, per_cu
);
8632 case DW_TAG_imported_declaration
:
8633 add_partial_symbol (pdi
, cu
);
8640 /* If the die has a sibling, skip to the sibling. */
8642 pdi
= pdi
->die_sibling
;
8646 /* Functions used to compute the fully scoped name of a partial DIE.
8648 Normally, this is simple. For C++, the parent DIE's fully scoped
8649 name is concatenated with "::" and the partial DIE's name.
8650 Enumerators are an exception; they use the scope of their parent
8651 enumeration type, i.e. the name of the enumeration type is not
8652 prepended to the enumerator.
8654 There are two complexities. One is DW_AT_specification; in this
8655 case "parent" means the parent of the target of the specification,
8656 instead of the direct parent of the DIE. The other is compilers
8657 which do not emit DW_TAG_namespace; in this case we try to guess
8658 the fully qualified name of structure types from their members'
8659 linkage names. This must be done using the DIE's children rather
8660 than the children of any DW_AT_specification target. We only need
8661 to do this for structures at the top level, i.e. if the target of
8662 any DW_AT_specification (if any; otherwise the DIE itself) does not
8665 /* Compute the scope prefix associated with PDI's parent, in
8666 compilation unit CU. The result will be allocated on CU's
8667 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8668 field. NULL is returned if no prefix is necessary. */
8670 partial_die_parent_scope (struct partial_die_info
*pdi
,
8671 struct dwarf2_cu
*cu
)
8673 const char *grandparent_scope
;
8674 struct partial_die_info
*parent
, *real_pdi
;
8676 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8677 then this means the parent of the specification DIE. */
8680 while (real_pdi
->has_specification
)
8681 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
8682 real_pdi
->spec_is_dwz
, cu
);
8684 parent
= real_pdi
->die_parent
;
8688 if (parent
->scope_set
)
8689 return parent
->scope
;
8693 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8695 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8696 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8697 Work around this problem here. */
8698 if (cu
->language
== language_cplus
8699 && parent
->tag
== DW_TAG_namespace
8700 && strcmp (parent
->name
, "::") == 0
8701 && grandparent_scope
== NULL
)
8703 parent
->scope
= NULL
;
8704 parent
->scope_set
= 1;
8708 if (pdi
->tag
== DW_TAG_enumerator
)
8709 /* Enumerators should not get the name of the enumeration as a prefix. */
8710 parent
->scope
= grandparent_scope
;
8711 else if (parent
->tag
== DW_TAG_namespace
8712 || parent
->tag
== DW_TAG_module
8713 || parent
->tag
== DW_TAG_structure_type
8714 || parent
->tag
== DW_TAG_class_type
8715 || parent
->tag
== DW_TAG_interface_type
8716 || parent
->tag
== DW_TAG_union_type
8717 || parent
->tag
== DW_TAG_enumeration_type
)
8719 if (grandparent_scope
== NULL
)
8720 parent
->scope
= parent
->name
;
8722 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8724 parent
->name
, 0, cu
);
8728 /* FIXME drow/2004-04-01: What should we be doing with
8729 function-local names? For partial symbols, we should probably be
8731 complaint (_("unhandled containing DIE tag %d for DIE at %s"),
8732 parent
->tag
, sect_offset_str (pdi
->sect_off
));
8733 parent
->scope
= grandparent_scope
;
8736 parent
->scope_set
= 1;
8737 return parent
->scope
;
8740 /* Return the fully scoped name associated with PDI, from compilation unit
8741 CU. The result will be allocated with malloc. */
8744 partial_die_full_name (struct partial_die_info
*pdi
,
8745 struct dwarf2_cu
*cu
)
8747 const char *parent_scope
;
8749 /* If this is a template instantiation, we can not work out the
8750 template arguments from partial DIEs. So, unfortunately, we have
8751 to go through the full DIEs. At least any work we do building
8752 types here will be reused if full symbols are loaded later. */
8753 if (pdi
->has_template_arguments
)
8757 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8759 struct die_info
*die
;
8760 struct attribute attr
;
8761 struct dwarf2_cu
*ref_cu
= cu
;
8763 /* DW_FORM_ref_addr is using section offset. */
8764 attr
.name
= (enum dwarf_attribute
) 0;
8765 attr
.form
= DW_FORM_ref_addr
;
8766 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8767 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8769 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8773 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8774 if (parent_scope
== NULL
)
8777 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
8781 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8783 struct dwarf2_per_objfile
*dwarf2_per_objfile
8784 = cu
->per_cu
->dwarf2_per_objfile
;
8785 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8786 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8788 const char *actual_name
= NULL
;
8790 char *built_actual_name
;
8792 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8794 built_actual_name
= partial_die_full_name (pdi
, cu
);
8795 if (built_actual_name
!= NULL
)
8796 actual_name
= built_actual_name
;
8798 if (actual_name
== NULL
)
8799 actual_name
= pdi
->name
;
8803 case DW_TAG_inlined_subroutine
:
8804 case DW_TAG_subprogram
:
8805 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
8806 if (pdi
->is_external
|| cu
->language
== language_ada
)
8808 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
8809 of the global scope. But in Ada, we want to be able to access
8810 nested procedures globally. So all Ada subprograms are stored
8811 in the global scope. */
8812 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8813 built_actual_name
!= NULL
,
8814 VAR_DOMAIN
, LOC_BLOCK
,
8815 &objfile
->global_psymbols
,
8816 addr
, cu
->language
, objfile
);
8820 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8821 built_actual_name
!= NULL
,
8822 VAR_DOMAIN
, LOC_BLOCK
,
8823 &objfile
->static_psymbols
,
8824 addr
, cu
->language
, objfile
);
8827 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8828 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8830 case DW_TAG_constant
:
8832 std::vector
<partial_symbol
*> *list
;
8834 if (pdi
->is_external
)
8835 list
= &objfile
->global_psymbols
;
8837 list
= &objfile
->static_psymbols
;
8838 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8839 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
8840 list
, 0, cu
->language
, objfile
);
8843 case DW_TAG_variable
:
8845 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8849 && !dwarf2_per_objfile
->has_section_at_zero
)
8851 /* A global or static variable may also have been stripped
8852 out by the linker if unused, in which case its address
8853 will be nullified; do not add such variables into partial
8854 symbol table then. */
8856 else if (pdi
->is_external
)
8859 Don't enter into the minimal symbol tables as there is
8860 a minimal symbol table entry from the ELF symbols already.
8861 Enter into partial symbol table if it has a location
8862 descriptor or a type.
8863 If the location descriptor is missing, new_symbol will create
8864 a LOC_UNRESOLVED symbol, the address of the variable will then
8865 be determined from the minimal symbol table whenever the variable
8867 The address for the partial symbol table entry is not
8868 used by GDB, but it comes in handy for debugging partial symbol
8871 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8872 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8873 built_actual_name
!= NULL
,
8874 VAR_DOMAIN
, LOC_STATIC
,
8875 &objfile
->global_psymbols
,
8877 cu
->language
, objfile
);
8881 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8883 /* Static Variable. Skip symbols whose value we cannot know (those
8884 without location descriptors or constant values). */
8885 if (!has_loc
&& !pdi
->has_const_value
)
8887 xfree (built_actual_name
);
8891 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8892 built_actual_name
!= NULL
,
8893 VAR_DOMAIN
, LOC_STATIC
,
8894 &objfile
->static_psymbols
,
8895 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
8896 cu
->language
, objfile
);
8899 case DW_TAG_typedef
:
8900 case DW_TAG_base_type
:
8901 case DW_TAG_subrange_type
:
8902 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8903 built_actual_name
!= NULL
,
8904 VAR_DOMAIN
, LOC_TYPEDEF
,
8905 &objfile
->static_psymbols
,
8906 0, cu
->language
, objfile
);
8908 case DW_TAG_imported_declaration
:
8909 case DW_TAG_namespace
:
8910 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8911 built_actual_name
!= NULL
,
8912 VAR_DOMAIN
, LOC_TYPEDEF
,
8913 &objfile
->global_psymbols
,
8914 0, cu
->language
, objfile
);
8917 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8918 built_actual_name
!= NULL
,
8919 MODULE_DOMAIN
, LOC_TYPEDEF
,
8920 &objfile
->global_psymbols
,
8921 0, cu
->language
, objfile
);
8923 case DW_TAG_class_type
:
8924 case DW_TAG_interface_type
:
8925 case DW_TAG_structure_type
:
8926 case DW_TAG_union_type
:
8927 case DW_TAG_enumeration_type
:
8928 /* Skip external references. The DWARF standard says in the section
8929 about "Structure, Union, and Class Type Entries": "An incomplete
8930 structure, union or class type is represented by a structure,
8931 union or class entry that does not have a byte size attribute
8932 and that has a DW_AT_declaration attribute." */
8933 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8935 xfree (built_actual_name
);
8939 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8940 static vs. global. */
8941 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8942 built_actual_name
!= NULL
,
8943 STRUCT_DOMAIN
, LOC_TYPEDEF
,
8944 cu
->language
== language_cplus
8945 ? &objfile
->global_psymbols
8946 : &objfile
->static_psymbols
,
8947 0, cu
->language
, objfile
);
8950 case DW_TAG_enumerator
:
8951 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8952 built_actual_name
!= NULL
,
8953 VAR_DOMAIN
, LOC_CONST
,
8954 cu
->language
== language_cplus
8955 ? &objfile
->global_psymbols
8956 : &objfile
->static_psymbols
,
8957 0, cu
->language
, objfile
);
8963 xfree (built_actual_name
);
8966 /* Read a partial die corresponding to a namespace; also, add a symbol
8967 corresponding to that namespace to the symbol table. NAMESPACE is
8968 the name of the enclosing namespace. */
8971 add_partial_namespace (struct partial_die_info
*pdi
,
8972 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8973 int set_addrmap
, struct dwarf2_cu
*cu
)
8975 /* Add a symbol for the namespace. */
8977 add_partial_symbol (pdi
, cu
);
8979 /* Now scan partial symbols in that namespace. */
8981 if (pdi
->has_children
)
8982 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8985 /* Read a partial die corresponding to a Fortran module. */
8988 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
8989 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
8991 /* Add a symbol for the namespace. */
8993 add_partial_symbol (pdi
, cu
);
8995 /* Now scan partial symbols in that module. */
8997 if (pdi
->has_children
)
8998 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9001 /* Read a partial die corresponding to a subprogram or an inlined
9002 subprogram and create a partial symbol for that subprogram.
9003 When the CU language allows it, this routine also defines a partial
9004 symbol for each nested subprogram that this subprogram contains.
9005 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
9006 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
9008 PDI may also be a lexical block, in which case we simply search
9009 recursively for subprograms defined inside that lexical block.
9010 Again, this is only performed when the CU language allows this
9011 type of definitions. */
9014 add_partial_subprogram (struct partial_die_info
*pdi
,
9015 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9016 int set_addrmap
, struct dwarf2_cu
*cu
)
9018 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
9020 if (pdi
->has_pc_info
)
9022 if (pdi
->lowpc
< *lowpc
)
9023 *lowpc
= pdi
->lowpc
;
9024 if (pdi
->highpc
> *highpc
)
9025 *highpc
= pdi
->highpc
;
9028 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9029 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9034 baseaddr
= ANOFFSET (objfile
->section_offsets
,
9035 SECT_OFF_TEXT (objfile
));
9036 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
9037 pdi
->lowpc
+ baseaddr
);
9038 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
9039 pdi
->highpc
+ baseaddr
);
9040 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
9041 cu
->per_cu
->v
.psymtab
);
9045 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
9047 if (!pdi
->is_declaration
)
9048 /* Ignore subprogram DIEs that do not have a name, they are
9049 illegal. Do not emit a complaint at this point, we will
9050 do so when we convert this psymtab into a symtab. */
9052 add_partial_symbol (pdi
, cu
);
9056 if (! pdi
->has_children
)
9059 if (cu
->language
== language_ada
)
9061 pdi
= pdi
->die_child
;
9065 if (pdi
->tag
== DW_TAG_subprogram
9066 || pdi
->tag
== DW_TAG_inlined_subroutine
9067 || pdi
->tag
== DW_TAG_lexical_block
)
9068 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
9069 pdi
= pdi
->die_sibling
;
9074 /* Read a partial die corresponding to an enumeration type. */
9077 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
9078 struct dwarf2_cu
*cu
)
9080 struct partial_die_info
*pdi
;
9082 if (enum_pdi
->name
!= NULL
)
9083 add_partial_symbol (enum_pdi
, cu
);
9085 pdi
= enum_pdi
->die_child
;
9088 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
9089 complaint (_("malformed enumerator DIE ignored"));
9091 add_partial_symbol (pdi
, cu
);
9092 pdi
= pdi
->die_sibling
;
9096 /* Return the initial uleb128 in the die at INFO_PTR. */
9099 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
9101 unsigned int bytes_read
;
9103 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9106 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
9107 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
9109 Return the corresponding abbrev, or NULL if the number is zero (indicating
9110 an empty DIE). In either case *BYTES_READ will be set to the length of
9111 the initial number. */
9113 static struct abbrev_info
*
9114 peek_die_abbrev (const die_reader_specs
&reader
,
9115 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
9117 dwarf2_cu
*cu
= reader
.cu
;
9118 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
9119 unsigned int abbrev_number
9120 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
9122 if (abbrev_number
== 0)
9125 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
9128 error (_("Dwarf Error: Could not find abbrev number %d in %s"
9129 " at offset %s [in module %s]"),
9130 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
9131 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
9137 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9138 Returns a pointer to the end of a series of DIEs, terminated by an empty
9139 DIE. Any children of the skipped DIEs will also be skipped. */
9141 static const gdb_byte
*
9142 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
9146 unsigned int bytes_read
;
9147 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
9150 return info_ptr
+ bytes_read
;
9152 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
9156 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9157 INFO_PTR should point just after the initial uleb128 of a DIE, and the
9158 abbrev corresponding to that skipped uleb128 should be passed in
9159 ABBREV. Returns a pointer to this DIE's sibling, skipping any
9162 static const gdb_byte
*
9163 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
9164 struct abbrev_info
*abbrev
)
9166 unsigned int bytes_read
;
9167 struct attribute attr
;
9168 bfd
*abfd
= reader
->abfd
;
9169 struct dwarf2_cu
*cu
= reader
->cu
;
9170 const gdb_byte
*buffer
= reader
->buffer
;
9171 const gdb_byte
*buffer_end
= reader
->buffer_end
;
9172 unsigned int form
, i
;
9174 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
9176 /* The only abbrev we care about is DW_AT_sibling. */
9177 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
9179 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
9180 if (attr
.form
== DW_FORM_ref_addr
)
9181 complaint (_("ignoring absolute DW_AT_sibling"));
9184 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
9185 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
9187 if (sibling_ptr
< info_ptr
)
9188 complaint (_("DW_AT_sibling points backwards"));
9189 else if (sibling_ptr
> reader
->buffer_end
)
9190 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
9196 /* If it isn't DW_AT_sibling, skip this attribute. */
9197 form
= abbrev
->attrs
[i
].form
;
9201 case DW_FORM_ref_addr
:
9202 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
9203 and later it is offset sized. */
9204 if (cu
->header
.version
== 2)
9205 info_ptr
+= cu
->header
.addr_size
;
9207 info_ptr
+= cu
->header
.offset_size
;
9209 case DW_FORM_GNU_ref_alt
:
9210 info_ptr
+= cu
->header
.offset_size
;
9213 info_ptr
+= cu
->header
.addr_size
;
9220 case DW_FORM_flag_present
:
9221 case DW_FORM_implicit_const
:
9233 case DW_FORM_ref_sig8
:
9236 case DW_FORM_data16
:
9239 case DW_FORM_string
:
9240 read_direct_string (abfd
, info_ptr
, &bytes_read
);
9241 info_ptr
+= bytes_read
;
9243 case DW_FORM_sec_offset
:
9245 case DW_FORM_GNU_strp_alt
:
9246 info_ptr
+= cu
->header
.offset_size
;
9248 case DW_FORM_exprloc
:
9250 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9251 info_ptr
+= bytes_read
;
9253 case DW_FORM_block1
:
9254 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
9256 case DW_FORM_block2
:
9257 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
9259 case DW_FORM_block4
:
9260 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
9264 case DW_FORM_ref_udata
:
9265 case DW_FORM_GNU_addr_index
:
9266 case DW_FORM_GNU_str_index
:
9267 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
9269 case DW_FORM_indirect
:
9270 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9271 info_ptr
+= bytes_read
;
9272 /* We need to continue parsing from here, so just go back to
9274 goto skip_attribute
;
9277 error (_("Dwarf Error: Cannot handle %s "
9278 "in DWARF reader [in module %s]"),
9279 dwarf_form_name (form
),
9280 bfd_get_filename (abfd
));
9284 if (abbrev
->has_children
)
9285 return skip_children (reader
, info_ptr
);
9290 /* Locate ORIG_PDI's sibling.
9291 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
9293 static const gdb_byte
*
9294 locate_pdi_sibling (const struct die_reader_specs
*reader
,
9295 struct partial_die_info
*orig_pdi
,
9296 const gdb_byte
*info_ptr
)
9298 /* Do we know the sibling already? */
9300 if (orig_pdi
->sibling
)
9301 return orig_pdi
->sibling
;
9303 /* Are there any children to deal with? */
9305 if (!orig_pdi
->has_children
)
9308 /* Skip the children the long way. */
9310 return skip_children (reader
, info_ptr
);
9313 /* Expand this partial symbol table into a full symbol table. SELF is
9317 dwarf2_read_symtab (struct partial_symtab
*self
,
9318 struct objfile
*objfile
)
9320 struct dwarf2_per_objfile
*dwarf2_per_objfile
9321 = get_dwarf2_per_objfile (objfile
);
9325 warning (_("bug: psymtab for %s is already read in."),
9332 printf_filtered (_("Reading in symbols for %s..."),
9334 gdb_flush (gdb_stdout
);
9337 /* If this psymtab is constructed from a debug-only objfile, the
9338 has_section_at_zero flag will not necessarily be correct. We
9339 can get the correct value for this flag by looking at the data
9340 associated with the (presumably stripped) associated objfile. */
9341 if (objfile
->separate_debug_objfile_backlink
)
9343 struct dwarf2_per_objfile
*dpo_backlink
9344 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
9346 dwarf2_per_objfile
->has_section_at_zero
9347 = dpo_backlink
->has_section_at_zero
;
9350 dwarf2_per_objfile
->reading_partial_symbols
= 0;
9352 psymtab_to_symtab_1 (self
);
9354 /* Finish up the debug error message. */
9356 printf_filtered (_("done.\n"));
9359 process_cu_includes (dwarf2_per_objfile
);
9362 /* Reading in full CUs. */
9364 /* Add PER_CU to the queue. */
9367 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9368 enum language pretend_language
)
9370 struct dwarf2_queue_item
*item
;
9373 item
= XNEW (struct dwarf2_queue_item
);
9374 item
->per_cu
= per_cu
;
9375 item
->pretend_language
= pretend_language
;
9378 if (dwarf2_queue
== NULL
)
9379 dwarf2_queue
= item
;
9381 dwarf2_queue_tail
->next
= item
;
9383 dwarf2_queue_tail
= item
;
9386 /* If PER_CU is not yet queued, add it to the queue.
9387 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
9389 The result is non-zero if PER_CU was queued, otherwise the result is zero
9390 meaning either PER_CU is already queued or it is already loaded.
9392 N.B. There is an invariant here that if a CU is queued then it is loaded.
9393 The caller is required to load PER_CU if we return non-zero. */
9396 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
9397 struct dwarf2_per_cu_data
*per_cu
,
9398 enum language pretend_language
)
9400 /* We may arrive here during partial symbol reading, if we need full
9401 DIEs to process an unusual case (e.g. template arguments). Do
9402 not queue PER_CU, just tell our caller to load its DIEs. */
9403 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
9405 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
9410 /* Mark the dependence relation so that we don't flush PER_CU
9412 if (dependent_cu
!= NULL
)
9413 dwarf2_add_dependence (dependent_cu
, per_cu
);
9415 /* If it's already on the queue, we have nothing to do. */
9419 /* If the compilation unit is already loaded, just mark it as
9421 if (per_cu
->cu
!= NULL
)
9423 per_cu
->cu
->last_used
= 0;
9427 /* Add it to the queue. */
9428 queue_comp_unit (per_cu
, pretend_language
);
9433 /* Process the queue. */
9436 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9438 struct dwarf2_queue_item
*item
, *next_item
;
9440 if (dwarf_read_debug
)
9442 fprintf_unfiltered (gdb_stdlog
,
9443 "Expanding one or more symtabs of objfile %s ...\n",
9444 objfile_name (dwarf2_per_objfile
->objfile
));
9447 /* The queue starts out with one item, but following a DIE reference
9448 may load a new CU, adding it to the end of the queue. */
9449 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
9451 if ((dwarf2_per_objfile
->using_index
9452 ? !item
->per_cu
->v
.quick
->compunit_symtab
9453 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
9454 /* Skip dummy CUs. */
9455 && item
->per_cu
->cu
!= NULL
)
9457 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
9458 unsigned int debug_print_threshold
;
9461 if (per_cu
->is_debug_types
)
9463 struct signatured_type
*sig_type
=
9464 (struct signatured_type
*) per_cu
;
9466 sprintf (buf
, "TU %s at offset %s",
9467 hex_string (sig_type
->signature
),
9468 sect_offset_str (per_cu
->sect_off
));
9469 /* There can be 100s of TUs.
9470 Only print them in verbose mode. */
9471 debug_print_threshold
= 2;
9475 sprintf (buf
, "CU at offset %s",
9476 sect_offset_str (per_cu
->sect_off
));
9477 debug_print_threshold
= 1;
9480 if (dwarf_read_debug
>= debug_print_threshold
)
9481 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
9483 if (per_cu
->is_debug_types
)
9484 process_full_type_unit (per_cu
, item
->pretend_language
);
9486 process_full_comp_unit (per_cu
, item
->pretend_language
);
9488 if (dwarf_read_debug
>= debug_print_threshold
)
9489 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
9492 item
->per_cu
->queued
= 0;
9493 next_item
= item
->next
;
9497 dwarf2_queue_tail
= NULL
;
9499 if (dwarf_read_debug
)
9501 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
9502 objfile_name (dwarf2_per_objfile
->objfile
));
9506 /* Read in full symbols for PST, and anything it depends on. */
9509 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
9511 struct dwarf2_per_cu_data
*per_cu
;
9517 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
9518 if (!pst
->dependencies
[i
]->readin
9519 && pst
->dependencies
[i
]->user
== NULL
)
9521 /* Inform about additional files that need to be read in. */
9524 /* FIXME: i18n: Need to make this a single string. */
9525 fputs_filtered (" ", gdb_stdout
);
9527 fputs_filtered ("and ", gdb_stdout
);
9529 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
9530 wrap_here (""); /* Flush output. */
9531 gdb_flush (gdb_stdout
);
9533 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
9536 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
9540 /* It's an include file, no symbols to read for it.
9541 Everything is in the parent symtab. */
9546 dw2_do_instantiate_symtab (per_cu
, false);
9549 /* Trivial hash function for die_info: the hash value of a DIE
9550 is its offset in .debug_info for this objfile. */
9553 die_hash (const void *item
)
9555 const struct die_info
*die
= (const struct die_info
*) item
;
9557 return to_underlying (die
->sect_off
);
9560 /* Trivial comparison function for die_info structures: two DIEs
9561 are equal if they have the same offset. */
9564 die_eq (const void *item_lhs
, const void *item_rhs
)
9566 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9567 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9569 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9572 /* die_reader_func for load_full_comp_unit.
9573 This is identical to read_signatured_type_reader,
9574 but is kept separate for now. */
9577 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
9578 const gdb_byte
*info_ptr
,
9579 struct die_info
*comp_unit_die
,
9583 struct dwarf2_cu
*cu
= reader
->cu
;
9584 enum language
*language_ptr
= (enum language
*) data
;
9586 gdb_assert (cu
->die_hash
== NULL
);
9588 htab_create_alloc_ex (cu
->header
.length
/ 12,
9592 &cu
->comp_unit_obstack
,
9593 hashtab_obstack_allocate
,
9594 dummy_obstack_deallocate
);
9597 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
9598 &info_ptr
, comp_unit_die
);
9599 cu
->dies
= comp_unit_die
;
9600 /* comp_unit_die is not stored in die_hash, no need. */
9602 /* We try not to read any attributes in this function, because not
9603 all CUs needed for references have been loaded yet, and symbol
9604 table processing isn't initialized. But we have to set the CU language,
9605 or we won't be able to build types correctly.
9606 Similarly, if we do not read the producer, we can not apply
9607 producer-specific interpretation. */
9608 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
9611 /* Load the DIEs associated with PER_CU into memory. */
9614 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9616 enum language pretend_language
)
9618 gdb_assert (! this_cu
->is_debug_types
);
9620 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1, skip_partial
,
9621 load_full_comp_unit_reader
, &pretend_language
);
9624 /* Add a DIE to the delayed physname list. */
9627 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9628 const char *name
, struct die_info
*die
,
9629 struct dwarf2_cu
*cu
)
9631 struct delayed_method_info mi
;
9633 mi
.fnfield_index
= fnfield_index
;
9637 cu
->method_list
.push_back (mi
);
9640 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9641 "const" / "volatile". If so, decrements LEN by the length of the
9642 modifier and return true. Otherwise return false. */
9646 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9648 size_t mod_len
= sizeof (mod
) - 1;
9649 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9657 /* Compute the physnames of any methods on the CU's method list.
9659 The computation of method physnames is delayed in order to avoid the
9660 (bad) condition that one of the method's formal parameters is of an as yet
9664 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9666 /* Only C++ delays computing physnames. */
9667 if (cu
->method_list
.empty ())
9669 gdb_assert (cu
->language
== language_cplus
);
9671 for (const delayed_method_info
&mi
: cu
->method_list
)
9673 const char *physname
;
9674 struct fn_fieldlist
*fn_flp
9675 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9676 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9677 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9678 = physname
? physname
: "";
9680 /* Since there's no tag to indicate whether a method is a
9681 const/volatile overload, extract that information out of the
9683 if (physname
!= NULL
)
9685 size_t len
= strlen (physname
);
9689 if (physname
[len
] == ')') /* shortcut */
9691 else if (check_modifier (physname
, len
, " const"))
9692 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9693 else if (check_modifier (physname
, len
, " volatile"))
9694 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9701 /* The list is no longer needed. */
9702 cu
->method_list
.clear ();
9705 /* Go objects should be embedded in a DW_TAG_module DIE,
9706 and it's not clear if/how imported objects will appear.
9707 To keep Go support simple until that's worked out,
9708 go back through what we've read and create something usable.
9709 We could do this while processing each DIE, and feels kinda cleaner,
9710 but that way is more invasive.
9711 This is to, for example, allow the user to type "p var" or "b main"
9712 without having to specify the package name, and allow lookups
9713 of module.object to work in contexts that use the expression
9717 fixup_go_packaging (struct dwarf2_cu
*cu
)
9719 char *package_name
= NULL
;
9720 struct pending
*list
;
9723 for (list
= *cu
->builder
->get_global_symbols ();
9727 for (i
= 0; i
< list
->nsyms
; ++i
)
9729 struct symbol
*sym
= list
->symbol
[i
];
9731 if (SYMBOL_LANGUAGE (sym
) == language_go
9732 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9734 char *this_package_name
= go_symbol_package_name (sym
);
9736 if (this_package_name
== NULL
)
9738 if (package_name
== NULL
)
9739 package_name
= this_package_name
;
9742 struct objfile
*objfile
9743 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9744 if (strcmp (package_name
, this_package_name
) != 0)
9745 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9746 (symbol_symtab (sym
) != NULL
9747 ? symtab_to_filename_for_display
9748 (symbol_symtab (sym
))
9749 : objfile_name (objfile
)),
9750 this_package_name
, package_name
);
9751 xfree (this_package_name
);
9757 if (package_name
!= NULL
)
9759 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9760 const char *saved_package_name
9761 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
9763 strlen (package_name
));
9764 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9765 saved_package_name
);
9768 sym
= allocate_symbol (objfile
);
9769 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
9770 SYMBOL_SET_NAMES (sym
, saved_package_name
,
9771 strlen (saved_package_name
), 0, objfile
);
9772 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9773 e.g., "main" finds the "main" module and not C's main(). */
9774 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9775 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9776 SYMBOL_TYPE (sym
) = type
;
9778 add_symbol_to_list (sym
, cu
->builder
->get_global_symbols ());
9780 xfree (package_name
);
9784 /* Allocate a fully-qualified name consisting of the two parts on the
9788 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9790 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9793 /* A helper that allocates a struct discriminant_info to attach to a
9796 static struct discriminant_info
*
9797 alloc_discriminant_info (struct type
*type
, int discriminant_index
,
9800 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9801 gdb_assert (discriminant_index
== -1
9802 || (discriminant_index
>= 0
9803 && discriminant_index
< TYPE_NFIELDS (type
)));
9804 gdb_assert (default_index
== -1
9805 || (default_index
>= 0 && default_index
< TYPE_NFIELDS (type
)));
9807 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
9809 struct discriminant_info
*disc
9810 = ((struct discriminant_info
*)
9812 offsetof (struct discriminant_info
, discriminants
)
9813 + TYPE_NFIELDS (type
) * sizeof (disc
->discriminants
[0])));
9814 disc
->default_index
= default_index
;
9815 disc
->discriminant_index
= discriminant_index
;
9817 struct dynamic_prop prop
;
9818 prop
.kind
= PROP_UNDEFINED
;
9819 prop
.data
.baton
= disc
;
9821 add_dyn_prop (DYN_PROP_DISCRIMINATED
, prop
, type
);
9826 /* Some versions of rustc emitted enums in an unusual way.
9828 Ordinary enums were emitted as unions. The first element of each
9829 structure in the union was named "RUST$ENUM$DISR". This element
9830 held the discriminant.
9832 These versions of Rust also implemented the "non-zero"
9833 optimization. When the enum had two values, and one is empty and
9834 the other holds a pointer that cannot be zero, the pointer is used
9835 as the discriminant, with a zero value meaning the empty variant.
9836 Here, the union's first member is of the form
9837 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9838 where the fieldnos are the indices of the fields that should be
9839 traversed in order to find the field (which may be several fields deep)
9840 and the variantname is the name of the variant of the case when the
9843 This function recognizes whether TYPE is of one of these forms,
9844 and, if so, smashes it to be a variant type. */
9847 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9849 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9851 /* We don't need to deal with empty enums. */
9852 if (TYPE_NFIELDS (type
) == 0)
9855 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9856 if (TYPE_NFIELDS (type
) == 1
9857 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9859 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9861 /* Decode the field name to find the offset of the
9863 ULONGEST bit_offset
= 0;
9864 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9865 while (name
[0] >= '0' && name
[0] <= '9')
9868 unsigned long index
= strtoul (name
, &tail
, 10);
9871 || index
>= TYPE_NFIELDS (field_type
)
9872 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9873 != FIELD_LOC_KIND_BITPOS
))
9875 complaint (_("Could not parse Rust enum encoding string \"%s\""
9877 TYPE_FIELD_NAME (type
, 0),
9878 objfile_name (objfile
));
9883 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9884 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9887 /* Make a union to hold the variants. */
9888 struct type
*union_type
= alloc_type (objfile
);
9889 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9890 TYPE_NFIELDS (union_type
) = 3;
9891 TYPE_FIELDS (union_type
)
9892 = (struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
));
9893 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9894 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
9896 /* Put the discriminant must at index 0. */
9897 TYPE_FIELD_TYPE (union_type
, 0) = field_type
;
9898 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
9899 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
9900 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 0), bit_offset
);
9902 /* The order of fields doesn't really matter, so put the real
9903 field at index 1 and the data-less field at index 2. */
9904 struct discriminant_info
*disc
9905 = alloc_discriminant_info (union_type
, 0, 1);
9906 TYPE_FIELD (union_type
, 1) = TYPE_FIELD (type
, 0);
9907 TYPE_FIELD_NAME (union_type
, 1)
9908 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1)));
9909 TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1))
9910 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9911 TYPE_FIELD_NAME (union_type
, 1));
9913 const char *dataless_name
9914 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9916 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9918 TYPE_FIELD_TYPE (union_type
, 2) = dataless_type
;
9919 /* NAME points into the original discriminant name, which
9920 already has the correct lifetime. */
9921 TYPE_FIELD_NAME (union_type
, 2) = name
;
9922 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 2), 0);
9923 disc
->discriminants
[2] = 0;
9925 /* Smash this type to be a structure type. We have to do this
9926 because the type has already been recorded. */
9927 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9928 TYPE_NFIELDS (type
) = 1;
9930 = (struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
));
9932 /* Install the variant part. */
9933 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9934 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9935 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
9937 else if (TYPE_NFIELDS (type
) == 1)
9939 /* We assume that a union with a single field is a univariant
9941 /* Smash this type to be a structure type. We have to do this
9942 because the type has already been recorded. */
9943 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9945 /* Make a union to hold the variants. */
9946 struct type
*union_type
= alloc_type (objfile
);
9947 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9948 TYPE_NFIELDS (union_type
) = TYPE_NFIELDS (type
);
9949 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9950 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
9951 TYPE_FIELDS (union_type
) = TYPE_FIELDS (type
);
9953 struct type
*field_type
= TYPE_FIELD_TYPE (union_type
, 0);
9954 const char *variant_name
9955 = rust_last_path_segment (TYPE_NAME (field_type
));
9956 TYPE_FIELD_NAME (union_type
, 0) = variant_name
;
9957 TYPE_NAME (field_type
)
9958 = rust_fully_qualify (&objfile
->objfile_obstack
,
9959 TYPE_NAME (type
), variant_name
);
9961 /* Install the union in the outer struct type. */
9962 TYPE_NFIELDS (type
) = 1;
9964 = (struct field
*) TYPE_ZALLOC (union_type
, sizeof (struct field
));
9965 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9966 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
9967 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9969 alloc_discriminant_info (union_type
, -1, 0);
9973 struct type
*disr_type
= nullptr;
9974 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
9976 disr_type
= TYPE_FIELD_TYPE (type
, i
);
9978 if (TYPE_CODE (disr_type
) != TYPE_CODE_STRUCT
)
9980 /* All fields of a true enum will be structs. */
9983 else if (TYPE_NFIELDS (disr_type
) == 0)
9985 /* Could be data-less variant, so keep going. */
9986 disr_type
= nullptr;
9988 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
9989 "RUST$ENUM$DISR") != 0)
9991 /* Not a Rust enum. */
10001 /* If we got here without a discriminant, then it's probably
10003 if (disr_type
== nullptr)
10006 /* Smash this type to be a structure type. We have to do this
10007 because the type has already been recorded. */
10008 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10010 /* Make a union to hold the variants. */
10011 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
10012 struct type
*union_type
= alloc_type (objfile
);
10013 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10014 TYPE_NFIELDS (union_type
) = 1 + TYPE_NFIELDS (type
);
10015 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10016 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
10017 TYPE_FIELDS (union_type
)
10018 = (struct field
*) TYPE_ZALLOC (union_type
,
10019 (TYPE_NFIELDS (union_type
)
10020 * sizeof (struct field
)));
10022 memcpy (TYPE_FIELDS (union_type
) + 1, TYPE_FIELDS (type
),
10023 TYPE_NFIELDS (type
) * sizeof (struct field
));
10025 /* Install the discriminant at index 0 in the union. */
10026 TYPE_FIELD (union_type
, 0) = *disr_field
;
10027 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
10028 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
10030 /* Install the union in the outer struct type. */
10031 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10032 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10033 TYPE_NFIELDS (type
) = 1;
10035 /* Set the size and offset of the union type. */
10036 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10038 /* We need a way to find the correct discriminant given a
10039 variant name. For convenience we build a map here. */
10040 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
10041 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
10042 for (int i
= 0; i
< TYPE_NFIELDS (enum_type
); ++i
)
10044 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
10047 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
10048 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
10052 int n_fields
= TYPE_NFIELDS (union_type
);
10053 struct discriminant_info
*disc
10054 = alloc_discriminant_info (union_type
, 0, -1);
10055 /* Skip the discriminant here. */
10056 for (int i
= 1; i
< n_fields
; ++i
)
10058 /* Find the final word in the name of this variant's type.
10059 That name can be used to look up the correct
10061 const char *variant_name
10062 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
,
10065 auto iter
= discriminant_map
.find (variant_name
);
10066 if (iter
!= discriminant_map
.end ())
10067 disc
->discriminants
[i
] = iter
->second
;
10069 /* Remove the discriminant field, if it exists. */
10070 struct type
*sub_type
= TYPE_FIELD_TYPE (union_type
, i
);
10071 if (TYPE_NFIELDS (sub_type
) > 0)
10073 --TYPE_NFIELDS (sub_type
);
10074 ++TYPE_FIELDS (sub_type
);
10076 TYPE_FIELD_NAME (union_type
, i
) = variant_name
;
10077 TYPE_NAME (sub_type
)
10078 = rust_fully_qualify (&objfile
->objfile_obstack
,
10079 TYPE_NAME (type
), variant_name
);
10084 /* Rewrite some Rust unions to be structures with variants parts. */
10087 rust_union_quirks (struct dwarf2_cu
*cu
)
10089 gdb_assert (cu
->language
== language_rust
);
10090 for (type
*type_
: cu
->rust_unions
)
10091 quirk_rust_enum (type_
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
10092 /* We don't need this any more. */
10093 cu
->rust_unions
.clear ();
10096 /* Return the symtab for PER_CU. This works properly regardless of
10097 whether we're using the index or psymtabs. */
10099 static struct compunit_symtab
*
10100 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
10102 return (per_cu
->dwarf2_per_objfile
->using_index
10103 ? per_cu
->v
.quick
->compunit_symtab
10104 : per_cu
->v
.psymtab
->compunit_symtab
);
10107 /* A helper function for computing the list of all symbol tables
10108 included by PER_CU. */
10111 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
10112 htab_t all_children
, htab_t all_type_symtabs
,
10113 struct dwarf2_per_cu_data
*per_cu
,
10114 struct compunit_symtab
*immediate_parent
)
10118 struct compunit_symtab
*cust
;
10119 struct dwarf2_per_cu_data
*iter
;
10121 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
10124 /* This inclusion and its children have been processed. */
10129 /* Only add a CU if it has a symbol table. */
10130 cust
= get_compunit_symtab (per_cu
);
10133 /* If this is a type unit only add its symbol table if we haven't
10134 seen it yet (type unit per_cu's can share symtabs). */
10135 if (per_cu
->is_debug_types
)
10137 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
10141 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
10142 if (cust
->user
== NULL
)
10143 cust
->user
= immediate_parent
;
10148 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
10149 if (cust
->user
== NULL
)
10150 cust
->user
= immediate_parent
;
10155 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
10158 recursively_compute_inclusions (result
, all_children
,
10159 all_type_symtabs
, iter
, cust
);
10163 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
10167 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
10169 gdb_assert (! per_cu
->is_debug_types
);
10171 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
10174 struct dwarf2_per_cu_data
*per_cu_iter
;
10175 struct compunit_symtab
*compunit_symtab_iter
;
10176 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
10177 htab_t all_children
, all_type_symtabs
;
10178 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
10180 /* If we don't have a symtab, we can just skip this case. */
10184 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10185 NULL
, xcalloc
, xfree
);
10186 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10187 NULL
, xcalloc
, xfree
);
10190 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
10194 recursively_compute_inclusions (&result_symtabs
, all_children
,
10195 all_type_symtabs
, per_cu_iter
,
10199 /* Now we have a transitive closure of all the included symtabs. */
10200 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
10202 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
10203 struct compunit_symtab
*, len
+ 1);
10205 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
10206 compunit_symtab_iter
);
10208 cust
->includes
[ix
] = compunit_symtab_iter
;
10209 cust
->includes
[len
] = NULL
;
10211 VEC_free (compunit_symtab_ptr
, result_symtabs
);
10212 htab_delete (all_children
);
10213 htab_delete (all_type_symtabs
);
10217 /* Compute the 'includes' field for the symtabs of all the CUs we just
10221 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
10223 for (dwarf2_per_cu_data
*iter
: dwarf2_per_objfile
->just_read_cus
)
10225 if (! iter
->is_debug_types
)
10226 compute_compunit_symtab_includes (iter
);
10229 dwarf2_per_objfile
->just_read_cus
.clear ();
10232 /* Generate full symbol information for PER_CU, whose DIEs have
10233 already been loaded into memory. */
10236 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
10237 enum language pretend_language
)
10239 struct dwarf2_cu
*cu
= per_cu
->cu
;
10240 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10241 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10242 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10243 CORE_ADDR lowpc
, highpc
;
10244 struct compunit_symtab
*cust
;
10245 CORE_ADDR baseaddr
;
10246 struct block
*static_block
;
10249 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10251 /* Clear the list here in case something was left over. */
10252 cu
->method_list
.clear ();
10254 cu
->language
= pretend_language
;
10255 cu
->language_defn
= language_def (cu
->language
);
10257 /* Do line number decoding in read_file_scope () */
10258 process_die (cu
->dies
, cu
);
10260 /* For now fudge the Go package. */
10261 if (cu
->language
== language_go
)
10262 fixup_go_packaging (cu
);
10264 /* Now that we have processed all the DIEs in the CU, all the types
10265 should be complete, and it should now be safe to compute all of the
10267 compute_delayed_physnames (cu
);
10269 if (cu
->language
== language_rust
)
10270 rust_union_quirks (cu
);
10272 /* Some compilers don't define a DW_AT_high_pc attribute for the
10273 compilation unit. If the DW_AT_high_pc is missing, synthesize
10274 it, by scanning the DIE's below the compilation unit. */
10275 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
10277 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
10278 static_block
= cu
->builder
->end_symtab_get_static_block (addr
, 0, 1);
10280 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
10281 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
10282 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
10283 addrmap to help ensure it has an accurate map of pc values belonging to
10285 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
10287 cust
= cu
->builder
->end_symtab_from_static_block (static_block
,
10288 SECT_OFF_TEXT (objfile
),
10293 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
10295 /* Set symtab language to language from DW_AT_language. If the
10296 compilation is from a C file generated by language preprocessors, do
10297 not set the language if it was already deduced by start_subfile. */
10298 if (!(cu
->language
== language_c
10299 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
10300 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10302 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
10303 produce DW_AT_location with location lists but it can be possibly
10304 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
10305 there were bugs in prologue debug info, fixed later in GCC-4.5
10306 by "unwind info for epilogues" patch (which is not directly related).
10308 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
10309 needed, it would be wrong due to missing DW_AT_producer there.
10311 Still one can confuse GDB by using non-standard GCC compilation
10312 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
10314 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
10315 cust
->locations_valid
= 1;
10317 if (gcc_4_minor
>= 5)
10318 cust
->epilogue_unwind_valid
= 1;
10320 cust
->call_site_htab
= cu
->call_site_htab
;
10323 if (dwarf2_per_objfile
->using_index
)
10324 per_cu
->v
.quick
->compunit_symtab
= cust
;
10327 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10328 pst
->compunit_symtab
= cust
;
10332 /* Push it for inclusion processing later. */
10333 dwarf2_per_objfile
->just_read_cus
.push_back (per_cu
);
10335 /* Not needed any more. */
10336 cu
->builder
.reset ();
10339 /* Generate full symbol information for type unit PER_CU, whose DIEs have
10340 already been loaded into memory. */
10343 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
10344 enum language pretend_language
)
10346 struct dwarf2_cu
*cu
= per_cu
->cu
;
10347 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10348 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10349 struct compunit_symtab
*cust
;
10350 struct signatured_type
*sig_type
;
10352 gdb_assert (per_cu
->is_debug_types
);
10353 sig_type
= (struct signatured_type
*) per_cu
;
10355 /* Clear the list here in case something was left over. */
10356 cu
->method_list
.clear ();
10358 cu
->language
= pretend_language
;
10359 cu
->language_defn
= language_def (cu
->language
);
10361 /* The symbol tables are set up in read_type_unit_scope. */
10362 process_die (cu
->dies
, cu
);
10364 /* For now fudge the Go package. */
10365 if (cu
->language
== language_go
)
10366 fixup_go_packaging (cu
);
10368 /* Now that we have processed all the DIEs in the CU, all the types
10369 should be complete, and it should now be safe to compute all of the
10371 compute_delayed_physnames (cu
);
10373 if (cu
->language
== language_rust
)
10374 rust_union_quirks (cu
);
10376 /* TUs share symbol tables.
10377 If this is the first TU to use this symtab, complete the construction
10378 of it with end_expandable_symtab. Otherwise, complete the addition of
10379 this TU's symbols to the existing symtab. */
10380 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
10382 cust
= cu
->builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
10383 sig_type
->type_unit_group
->compunit_symtab
= cust
;
10387 /* Set symtab language to language from DW_AT_language. If the
10388 compilation is from a C file generated by language preprocessors,
10389 do not set the language if it was already deduced by
10391 if (!(cu
->language
== language_c
10392 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
10393 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10398 cu
->builder
->augment_type_symtab ();
10399 cust
= sig_type
->type_unit_group
->compunit_symtab
;
10402 if (dwarf2_per_objfile
->using_index
)
10403 per_cu
->v
.quick
->compunit_symtab
= cust
;
10406 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10407 pst
->compunit_symtab
= cust
;
10411 /* Not needed any more. */
10412 cu
->builder
.reset ();
10415 /* Process an imported unit DIE. */
10418 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10420 struct attribute
*attr
;
10422 /* For now we don't handle imported units in type units. */
10423 if (cu
->per_cu
->is_debug_types
)
10425 error (_("Dwarf Error: DW_TAG_imported_unit is not"
10426 " supported in type units [in module %s]"),
10427 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
10430 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10433 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
10434 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
10435 dwarf2_per_cu_data
*per_cu
10436 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
10437 cu
->per_cu
->dwarf2_per_objfile
);
10439 /* If necessary, add it to the queue and load its DIEs. */
10440 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
10441 load_full_comp_unit (per_cu
, false, cu
->language
);
10443 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
10448 /* RAII object that represents a process_die scope: i.e.,
10449 starts/finishes processing a DIE. */
10450 class process_die_scope
10453 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
10454 : m_die (die
), m_cu (cu
)
10456 /* We should only be processing DIEs not already in process. */
10457 gdb_assert (!m_die
->in_process
);
10458 m_die
->in_process
= true;
10461 ~process_die_scope ()
10463 m_die
->in_process
= false;
10465 /* If we're done processing the DIE for the CU that owns the line
10466 header, we don't need the line header anymore. */
10467 if (m_cu
->line_header_die_owner
== m_die
)
10469 delete m_cu
->line_header
;
10470 m_cu
->line_header
= NULL
;
10471 m_cu
->line_header_die_owner
= NULL
;
10480 /* Process a die and its children. */
10483 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10485 process_die_scope
scope (die
, cu
);
10489 case DW_TAG_padding
:
10491 case DW_TAG_compile_unit
:
10492 case DW_TAG_partial_unit
:
10493 read_file_scope (die
, cu
);
10495 case DW_TAG_type_unit
:
10496 read_type_unit_scope (die
, cu
);
10498 case DW_TAG_subprogram
:
10499 case DW_TAG_inlined_subroutine
:
10500 read_func_scope (die
, cu
);
10502 case DW_TAG_lexical_block
:
10503 case DW_TAG_try_block
:
10504 case DW_TAG_catch_block
:
10505 read_lexical_block_scope (die
, cu
);
10507 case DW_TAG_call_site
:
10508 case DW_TAG_GNU_call_site
:
10509 read_call_site_scope (die
, cu
);
10511 case DW_TAG_class_type
:
10512 case DW_TAG_interface_type
:
10513 case DW_TAG_structure_type
:
10514 case DW_TAG_union_type
:
10515 process_structure_scope (die
, cu
);
10517 case DW_TAG_enumeration_type
:
10518 process_enumeration_scope (die
, cu
);
10521 /* These dies have a type, but processing them does not create
10522 a symbol or recurse to process the children. Therefore we can
10523 read them on-demand through read_type_die. */
10524 case DW_TAG_subroutine_type
:
10525 case DW_TAG_set_type
:
10526 case DW_TAG_array_type
:
10527 case DW_TAG_pointer_type
:
10528 case DW_TAG_ptr_to_member_type
:
10529 case DW_TAG_reference_type
:
10530 case DW_TAG_rvalue_reference_type
:
10531 case DW_TAG_string_type
:
10534 case DW_TAG_base_type
:
10535 case DW_TAG_subrange_type
:
10536 case DW_TAG_typedef
:
10537 /* Add a typedef symbol for the type definition, if it has a
10539 new_symbol (die
, read_type_die (die
, cu
), cu
);
10541 case DW_TAG_common_block
:
10542 read_common_block (die
, cu
);
10544 case DW_TAG_common_inclusion
:
10546 case DW_TAG_namespace
:
10547 cu
->processing_has_namespace_info
= 1;
10548 read_namespace (die
, cu
);
10550 case DW_TAG_module
:
10551 cu
->processing_has_namespace_info
= 1;
10552 read_module (die
, cu
);
10554 case DW_TAG_imported_declaration
:
10555 cu
->processing_has_namespace_info
= 1;
10556 if (read_namespace_alias (die
, cu
))
10558 /* The declaration is not a global namespace alias. */
10559 /* Fall through. */
10560 case DW_TAG_imported_module
:
10561 cu
->processing_has_namespace_info
= 1;
10562 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10563 || cu
->language
!= language_fortran
))
10564 complaint (_("Tag '%s' has unexpected children"),
10565 dwarf_tag_name (die
->tag
));
10566 read_import_statement (die
, cu
);
10569 case DW_TAG_imported_unit
:
10570 process_imported_unit_die (die
, cu
);
10573 case DW_TAG_variable
:
10574 read_variable (die
, cu
);
10578 new_symbol (die
, NULL
, cu
);
10583 /* DWARF name computation. */
10585 /* A helper function for dwarf2_compute_name which determines whether DIE
10586 needs to have the name of the scope prepended to the name listed in the
10590 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10592 struct attribute
*attr
;
10596 case DW_TAG_namespace
:
10597 case DW_TAG_typedef
:
10598 case DW_TAG_class_type
:
10599 case DW_TAG_interface_type
:
10600 case DW_TAG_structure_type
:
10601 case DW_TAG_union_type
:
10602 case DW_TAG_enumeration_type
:
10603 case DW_TAG_enumerator
:
10604 case DW_TAG_subprogram
:
10605 case DW_TAG_inlined_subroutine
:
10606 case DW_TAG_member
:
10607 case DW_TAG_imported_declaration
:
10610 case DW_TAG_variable
:
10611 case DW_TAG_constant
:
10612 /* We only need to prefix "globally" visible variables. These include
10613 any variable marked with DW_AT_external or any variable that
10614 lives in a namespace. [Variables in anonymous namespaces
10615 require prefixing, but they are not DW_AT_external.] */
10617 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10619 struct dwarf2_cu
*spec_cu
= cu
;
10621 return die_needs_namespace (die_specification (die
, &spec_cu
),
10625 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10626 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10627 && die
->parent
->tag
!= DW_TAG_module
)
10629 /* A variable in a lexical block of some kind does not need a
10630 namespace, even though in C++ such variables may be external
10631 and have a mangled name. */
10632 if (die
->parent
->tag
== DW_TAG_lexical_block
10633 || die
->parent
->tag
== DW_TAG_try_block
10634 || die
->parent
->tag
== DW_TAG_catch_block
10635 || die
->parent
->tag
== DW_TAG_subprogram
)
10644 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10645 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10646 defined for the given DIE. */
10648 static struct attribute
*
10649 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10651 struct attribute
*attr
;
10653 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10655 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10660 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10661 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10662 defined for the given DIE. */
10664 static const char *
10665 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10667 const char *linkage_name
;
10669 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10670 if (linkage_name
== NULL
)
10671 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10673 return linkage_name
;
10676 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10677 compute the physname for the object, which include a method's:
10678 - formal parameters (C++),
10679 - receiver type (Go),
10681 The term "physname" is a bit confusing.
10682 For C++, for example, it is the demangled name.
10683 For Go, for example, it's the mangled name.
10685 For Ada, return the DIE's linkage name rather than the fully qualified
10686 name. PHYSNAME is ignored..
10688 The result is allocated on the objfile_obstack and canonicalized. */
10690 static const char *
10691 dwarf2_compute_name (const char *name
,
10692 struct die_info
*die
, struct dwarf2_cu
*cu
,
10695 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10698 name
= dwarf2_name (die
, cu
);
10700 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10701 but otherwise compute it by typename_concat inside GDB.
10702 FIXME: Actually this is not really true, or at least not always true.
10703 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
10704 Fortran names because there is no mangling standard. So new_symbol
10705 will set the demangled name to the result of dwarf2_full_name, and it is
10706 the demangled name that GDB uses if it exists. */
10707 if (cu
->language
== language_ada
10708 || (cu
->language
== language_fortran
&& physname
))
10710 /* For Ada unit, we prefer the linkage name over the name, as
10711 the former contains the exported name, which the user expects
10712 to be able to reference. Ideally, we want the user to be able
10713 to reference this entity using either natural or linkage name,
10714 but we haven't started looking at this enhancement yet. */
10715 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10717 if (linkage_name
!= NULL
)
10718 return linkage_name
;
10721 /* These are the only languages we know how to qualify names in. */
10723 && (cu
->language
== language_cplus
10724 || cu
->language
== language_fortran
|| cu
->language
== language_d
10725 || cu
->language
== language_rust
))
10727 if (die_needs_namespace (die
, cu
))
10729 const char *prefix
;
10730 const char *canonical_name
= NULL
;
10734 prefix
= determine_prefix (die
, cu
);
10735 if (*prefix
!= '\0')
10737 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
10740 buf
.puts (prefixed_name
);
10741 xfree (prefixed_name
);
10746 /* Template parameters may be specified in the DIE's DW_AT_name, or
10747 as children with DW_TAG_template_type_param or
10748 DW_TAG_value_type_param. If the latter, add them to the name
10749 here. If the name already has template parameters, then
10750 skip this step; some versions of GCC emit both, and
10751 it is more efficient to use the pre-computed name.
10753 Something to keep in mind about this process: it is very
10754 unlikely, or in some cases downright impossible, to produce
10755 something that will match the mangled name of a function.
10756 If the definition of the function has the same debug info,
10757 we should be able to match up with it anyway. But fallbacks
10758 using the minimal symbol, for instance to find a method
10759 implemented in a stripped copy of libstdc++, will not work.
10760 If we do not have debug info for the definition, we will have to
10761 match them up some other way.
10763 When we do name matching there is a related problem with function
10764 templates; two instantiated function templates are allowed to
10765 differ only by their return types, which we do not add here. */
10767 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10769 struct attribute
*attr
;
10770 struct die_info
*child
;
10773 die
->building_fullname
= 1;
10775 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10779 const gdb_byte
*bytes
;
10780 struct dwarf2_locexpr_baton
*baton
;
10783 if (child
->tag
!= DW_TAG_template_type_param
10784 && child
->tag
!= DW_TAG_template_value_param
)
10795 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10798 complaint (_("template parameter missing DW_AT_type"));
10799 buf
.puts ("UNKNOWN_TYPE");
10802 type
= die_type (child
, cu
);
10804 if (child
->tag
== DW_TAG_template_type_param
)
10806 c_print_type (type
, "", &buf
, -1, 0, cu
->language
,
10807 &type_print_raw_options
);
10811 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10814 complaint (_("template parameter missing "
10815 "DW_AT_const_value"));
10816 buf
.puts ("UNKNOWN_VALUE");
10820 dwarf2_const_value_attr (attr
, type
, name
,
10821 &cu
->comp_unit_obstack
, cu
,
10822 &value
, &bytes
, &baton
);
10824 if (TYPE_NOSIGN (type
))
10825 /* GDB prints characters as NUMBER 'CHAR'. If that's
10826 changed, this can use value_print instead. */
10827 c_printchar (value
, type
, &buf
);
10830 struct value_print_options opts
;
10833 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10837 else if (bytes
!= NULL
)
10839 v
= allocate_value (type
);
10840 memcpy (value_contents_writeable (v
), bytes
,
10841 TYPE_LENGTH (type
));
10844 v
= value_from_longest (type
, value
);
10846 /* Specify decimal so that we do not depend on
10848 get_formatted_print_options (&opts
, 'd');
10850 value_print (v
, &buf
, &opts
);
10855 die
->building_fullname
= 0;
10859 /* Close the argument list, with a space if necessary
10860 (nested templates). */
10861 if (!buf
.empty () && buf
.string ().back () == '>')
10868 /* For C++ methods, append formal parameter type
10869 information, if PHYSNAME. */
10871 if (physname
&& die
->tag
== DW_TAG_subprogram
10872 && cu
->language
== language_cplus
)
10874 struct type
*type
= read_type_die (die
, cu
);
10876 c_type_print_args (type
, &buf
, 1, cu
->language
,
10877 &type_print_raw_options
);
10879 if (cu
->language
== language_cplus
)
10881 /* Assume that an artificial first parameter is
10882 "this", but do not crash if it is not. RealView
10883 marks unnamed (and thus unused) parameters as
10884 artificial; there is no way to differentiate
10886 if (TYPE_NFIELDS (type
) > 0
10887 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10888 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
10889 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10891 buf
.puts (" const");
10895 const std::string
&intermediate_name
= buf
.string ();
10897 if (cu
->language
== language_cplus
)
10899 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10900 &objfile
->per_bfd
->storage_obstack
);
10902 /* If we only computed INTERMEDIATE_NAME, or if
10903 INTERMEDIATE_NAME is already canonical, then we need to
10904 copy it to the appropriate obstack. */
10905 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10906 name
= ((const char *)
10907 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
10908 intermediate_name
.c_str (),
10909 intermediate_name
.length ()));
10911 name
= canonical_name
;
10918 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10919 If scope qualifiers are appropriate they will be added. The result
10920 will be allocated on the storage_obstack, or NULL if the DIE does
10921 not have a name. NAME may either be from a previous call to
10922 dwarf2_name or NULL.
10924 The output string will be canonicalized (if C++). */
10926 static const char *
10927 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10929 return dwarf2_compute_name (name
, die
, cu
, 0);
10932 /* Construct a physname for the given DIE in CU. NAME may either be
10933 from a previous call to dwarf2_name or NULL. The result will be
10934 allocated on the objfile_objstack or NULL if the DIE does not have a
10937 The output string will be canonicalized (if C++). */
10939 static const char *
10940 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10942 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10943 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10946 /* In this case dwarf2_compute_name is just a shortcut not building anything
10948 if (!die_needs_namespace (die
, cu
))
10949 return dwarf2_compute_name (name
, die
, cu
, 1);
10951 mangled
= dw2_linkage_name (die
, cu
);
10953 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10954 See https://github.com/rust-lang/rust/issues/32925. */
10955 if (cu
->language
== language_rust
&& mangled
!= NULL
10956 && strchr (mangled
, '{') != NULL
)
10959 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
10961 gdb::unique_xmalloc_ptr
<char> demangled
;
10962 if (mangled
!= NULL
)
10965 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
10967 /* Do nothing (do not demangle the symbol name). */
10969 else if (cu
->language
== language_go
)
10971 /* This is a lie, but we already lie to the caller new_symbol.
10972 new_symbol assumes we return the mangled name.
10973 This just undoes that lie until things are cleaned up. */
10977 /* Use DMGL_RET_DROP for C++ template functions to suppress
10978 their return type. It is easier for GDB users to search
10979 for such functions as `name(params)' than `long name(params)'.
10980 In such case the minimal symbol names do not match the full
10981 symbol names but for template functions there is never a need
10982 to look up their definition from their declaration so
10983 the only disadvantage remains the minimal symbol variant
10984 `long name(params)' does not have the proper inferior type. */
10985 demangled
.reset (gdb_demangle (mangled
,
10986 (DMGL_PARAMS
| DMGL_ANSI
10987 | DMGL_RET_DROP
)));
10990 canon
= demangled
.get ();
10998 if (canon
== NULL
|| check_physname
)
11000 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
11002 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
11004 /* It may not mean a bug in GDB. The compiler could also
11005 compute DW_AT_linkage_name incorrectly. But in such case
11006 GDB would need to be bug-to-bug compatible. */
11008 complaint (_("Computed physname <%s> does not match demangled <%s> "
11009 "(from linkage <%s>) - DIE at %s [in module %s]"),
11010 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
11011 objfile_name (objfile
));
11013 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
11014 is available here - over computed PHYSNAME. It is safer
11015 against both buggy GDB and buggy compilers. */
11029 retval
= ((const char *)
11030 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
11031 retval
, strlen (retval
)));
11036 /* Inspect DIE in CU for a namespace alias. If one exists, record
11037 a new symbol for it.
11039 Returns 1 if a namespace alias was recorded, 0 otherwise. */
11042 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
11044 struct attribute
*attr
;
11046 /* If the die does not have a name, this is not a namespace
11048 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11052 struct die_info
*d
= die
;
11053 struct dwarf2_cu
*imported_cu
= cu
;
11055 /* If the compiler has nested DW_AT_imported_declaration DIEs,
11056 keep inspecting DIEs until we hit the underlying import. */
11057 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
11058 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
11060 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
11064 d
= follow_die_ref (d
, attr
, &imported_cu
);
11065 if (d
->tag
!= DW_TAG_imported_declaration
)
11069 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
11071 complaint (_("DIE at %s has too many recursively imported "
11072 "declarations"), sect_offset_str (d
->sect_off
));
11079 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
11081 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
11082 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
11084 /* This declaration is a global namespace alias. Add
11085 a symbol for it whose type is the aliased namespace. */
11086 new_symbol (die
, type
, cu
);
11095 /* Return the using directives repository (global or local?) to use in the
11096 current context for CU.
11098 For Ada, imported declarations can materialize renamings, which *may* be
11099 global. However it is impossible (for now?) in DWARF to distinguish
11100 "external" imported declarations and "static" ones. As all imported
11101 declarations seem to be static in all other languages, make them all CU-wide
11102 global only in Ada. */
11104 static struct using_direct
**
11105 using_directives (struct dwarf2_cu
*cu
)
11107 if (cu
->language
== language_ada
&& cu
->builder
->outermost_context_p ())
11108 return cu
->builder
->get_global_using_directives ();
11110 return cu
->builder
->get_local_using_directives ();
11113 /* Read the import statement specified by the given die and record it. */
11116 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
11118 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11119 struct attribute
*import_attr
;
11120 struct die_info
*imported_die
, *child_die
;
11121 struct dwarf2_cu
*imported_cu
;
11122 const char *imported_name
;
11123 const char *imported_name_prefix
;
11124 const char *canonical_name
;
11125 const char *import_alias
;
11126 const char *imported_declaration
= NULL
;
11127 const char *import_prefix
;
11128 std::vector
<const char *> excludes
;
11130 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
11131 if (import_attr
== NULL
)
11133 complaint (_("Tag '%s' has no DW_AT_import"),
11134 dwarf_tag_name (die
->tag
));
11139 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
11140 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11141 if (imported_name
== NULL
)
11143 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
11145 The import in the following code:
11159 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
11160 <52> DW_AT_decl_file : 1
11161 <53> DW_AT_decl_line : 6
11162 <54> DW_AT_import : <0x75>
11163 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
11164 <59> DW_AT_name : B
11165 <5b> DW_AT_decl_file : 1
11166 <5c> DW_AT_decl_line : 2
11167 <5d> DW_AT_type : <0x6e>
11169 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
11170 <76> DW_AT_byte_size : 4
11171 <77> DW_AT_encoding : 5 (signed)
11173 imports the wrong die ( 0x75 instead of 0x58 ).
11174 This case will be ignored until the gcc bug is fixed. */
11178 /* Figure out the local name after import. */
11179 import_alias
= dwarf2_name (die
, cu
);
11181 /* Figure out where the statement is being imported to. */
11182 import_prefix
= determine_prefix (die
, cu
);
11184 /* Figure out what the scope of the imported die is and prepend it
11185 to the name of the imported die. */
11186 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
11188 if (imported_die
->tag
!= DW_TAG_namespace
11189 && imported_die
->tag
!= DW_TAG_module
)
11191 imported_declaration
= imported_name
;
11192 canonical_name
= imported_name_prefix
;
11194 else if (strlen (imported_name_prefix
) > 0)
11195 canonical_name
= obconcat (&objfile
->objfile_obstack
,
11196 imported_name_prefix
,
11197 (cu
->language
== language_d
? "." : "::"),
11198 imported_name
, (char *) NULL
);
11200 canonical_name
= imported_name
;
11202 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
11203 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11204 child_die
= sibling_die (child_die
))
11206 /* DWARF-4: A Fortran use statement with a “rename list” may be
11207 represented by an imported module entry with an import attribute
11208 referring to the module and owned entries corresponding to those
11209 entities that are renamed as part of being imported. */
11211 if (child_die
->tag
!= DW_TAG_imported_declaration
)
11213 complaint (_("child DW_TAG_imported_declaration expected "
11214 "- DIE at %s [in module %s]"),
11215 sect_offset_str (child_die
->sect_off
),
11216 objfile_name (objfile
));
11220 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
11221 if (import_attr
== NULL
)
11223 complaint (_("Tag '%s' has no DW_AT_import"),
11224 dwarf_tag_name (child_die
->tag
));
11229 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
11231 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11232 if (imported_name
== NULL
)
11234 complaint (_("child DW_TAG_imported_declaration has unknown "
11235 "imported name - DIE at %s [in module %s]"),
11236 sect_offset_str (child_die
->sect_off
),
11237 objfile_name (objfile
));
11241 excludes
.push_back (imported_name
);
11243 process_die (child_die
, cu
);
11246 add_using_directive (using_directives (cu
),
11250 imported_declaration
,
11253 &objfile
->objfile_obstack
);
11256 /* ICC<14 does not output the required DW_AT_declaration on incomplete
11257 types, but gives them a size of zero. Starting with version 14,
11258 ICC is compatible with GCC. */
11261 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
11263 if (!cu
->checked_producer
)
11264 check_producer (cu
);
11266 return cu
->producer_is_icc_lt_14
;
11269 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
11270 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
11271 this, it was first present in GCC release 4.3.0. */
11274 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
11276 if (!cu
->checked_producer
)
11277 check_producer (cu
);
11279 return cu
->producer_is_gcc_lt_4_3
;
11282 static file_and_directory
11283 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
11285 file_and_directory res
;
11287 /* Find the filename. Do not use dwarf2_name here, since the filename
11288 is not a source language identifier. */
11289 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
11290 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
11292 if (res
.comp_dir
== NULL
11293 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
11294 && IS_ABSOLUTE_PATH (res
.name
))
11296 res
.comp_dir_storage
= ldirname (res
.name
);
11297 if (!res
.comp_dir_storage
.empty ())
11298 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
11300 if (res
.comp_dir
!= NULL
)
11302 /* Irix 6.2 native cc prepends <machine>.: to the compilation
11303 directory, get rid of it. */
11304 const char *cp
= strchr (res
.comp_dir
, ':');
11306 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
11307 res
.comp_dir
= cp
+ 1;
11310 if (res
.name
== NULL
)
11311 res
.name
= "<unknown>";
11316 /* Handle DW_AT_stmt_list for a compilation unit.
11317 DIE is the DW_TAG_compile_unit die for CU.
11318 COMP_DIR is the compilation directory. LOWPC is passed to
11319 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
11322 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
11323 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
11325 struct dwarf2_per_objfile
*dwarf2_per_objfile
11326 = cu
->per_cu
->dwarf2_per_objfile
;
11327 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11328 struct attribute
*attr
;
11329 struct line_header line_header_local
;
11330 hashval_t line_header_local_hash
;
11332 int decode_mapping
;
11334 gdb_assert (! cu
->per_cu
->is_debug_types
);
11336 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11340 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11342 /* The line header hash table is only created if needed (it exists to
11343 prevent redundant reading of the line table for partial_units).
11344 If we're given a partial_unit, we'll need it. If we're given a
11345 compile_unit, then use the line header hash table if it's already
11346 created, but don't create one just yet. */
11348 if (dwarf2_per_objfile
->line_header_hash
== NULL
11349 && die
->tag
== DW_TAG_partial_unit
)
11351 dwarf2_per_objfile
->line_header_hash
11352 = htab_create_alloc_ex (127, line_header_hash_voidp
,
11353 line_header_eq_voidp
,
11354 free_line_header_voidp
,
11355 &objfile
->objfile_obstack
,
11356 hashtab_obstack_allocate
,
11357 dummy_obstack_deallocate
);
11360 line_header_local
.sect_off
= line_offset
;
11361 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
11362 line_header_local_hash
= line_header_hash (&line_header_local
);
11363 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
11365 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11366 &line_header_local
,
11367 line_header_local_hash
, NO_INSERT
);
11369 /* For DW_TAG_compile_unit we need info like symtab::linetable which
11370 is not present in *SLOT (since if there is something in *SLOT then
11371 it will be for a partial_unit). */
11372 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
11374 gdb_assert (*slot
!= NULL
);
11375 cu
->line_header
= (struct line_header
*) *slot
;
11380 /* dwarf_decode_line_header does not yet provide sufficient information.
11381 We always have to call also dwarf_decode_lines for it. */
11382 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
11386 cu
->line_header
= lh
.release ();
11387 cu
->line_header_die_owner
= die
;
11389 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
11393 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11394 &line_header_local
,
11395 line_header_local_hash
, INSERT
);
11396 gdb_assert (slot
!= NULL
);
11398 if (slot
!= NULL
&& *slot
== NULL
)
11400 /* This newly decoded line number information unit will be owned
11401 by line_header_hash hash table. */
11402 *slot
= cu
->line_header
;
11403 cu
->line_header_die_owner
= NULL
;
11407 /* We cannot free any current entry in (*slot) as that struct line_header
11408 may be already used by multiple CUs. Create only temporary decoded
11409 line_header for this CU - it may happen at most once for each line
11410 number information unit. And if we're not using line_header_hash
11411 then this is what we want as well. */
11412 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
11414 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
11415 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
11420 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
11423 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11425 struct dwarf2_per_objfile
*dwarf2_per_objfile
11426 = cu
->per_cu
->dwarf2_per_objfile
;
11427 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11428 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11429 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
11430 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
11431 struct attribute
*attr
;
11432 struct die_info
*child_die
;
11433 CORE_ADDR baseaddr
;
11435 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11437 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
11439 /* If we didn't find a lowpc, set it to highpc to avoid complaints
11440 from finish_block. */
11441 if (lowpc
== ((CORE_ADDR
) -1))
11443 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11445 file_and_directory fnd
= find_file_and_directory (die
, cu
);
11447 prepare_one_comp_unit (cu
, die
, cu
->language
);
11449 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
11450 standardised yet. As a workaround for the language detection we fall
11451 back to the DW_AT_producer string. */
11452 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
11453 cu
->language
= language_opencl
;
11455 /* Similar hack for Go. */
11456 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
11457 set_cu_language (DW_LANG_Go
, cu
);
11459 dwarf2_start_symtab (cu
, fnd
.name
, fnd
.comp_dir
, lowpc
);
11461 /* Decode line number information if present. We do this before
11462 processing child DIEs, so that the line header table is available
11463 for DW_AT_decl_file. */
11464 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
11466 /* Process all dies in compilation unit. */
11467 if (die
->child
!= NULL
)
11469 child_die
= die
->child
;
11470 while (child_die
&& child_die
->tag
)
11472 process_die (child_die
, cu
);
11473 child_die
= sibling_die (child_die
);
11477 /* Decode macro information, if present. Dwarf 2 macro information
11478 refers to information in the line number info statement program
11479 header, so we can only read it if we've read the header
11481 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11483 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11484 if (attr
&& cu
->line_header
)
11486 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11487 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11489 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
11493 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11494 if (attr
&& cu
->line_header
)
11496 unsigned int macro_offset
= DW_UNSND (attr
);
11498 dwarf_decode_macros (cu
, macro_offset
, 0);
11503 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
11504 Create the set of symtabs used by this TU, or if this TU is sharing
11505 symtabs with another TU and the symtabs have already been created
11506 then restore those symtabs in the line header.
11507 We don't need the pc/line-number mapping for type units. */
11510 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
11512 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
11513 struct type_unit_group
*tu_group
;
11515 struct attribute
*attr
;
11517 struct signatured_type
*sig_type
;
11519 gdb_assert (per_cu
->is_debug_types
);
11520 sig_type
= (struct signatured_type
*) per_cu
;
11522 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11524 /* If we're using .gdb_index (includes -readnow) then
11525 per_cu->type_unit_group may not have been set up yet. */
11526 if (sig_type
->type_unit_group
== NULL
)
11527 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
11528 tu_group
= sig_type
->type_unit_group
;
11530 /* If we've already processed this stmt_list there's no real need to
11531 do it again, we could fake it and just recreate the part we need
11532 (file name,index -> symtab mapping). If data shows this optimization
11533 is useful we can do it then. */
11534 first_time
= tu_group
->compunit_symtab
== NULL
;
11536 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11541 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11542 lh
= dwarf_decode_line_header (line_offset
, cu
);
11547 dwarf2_start_symtab (cu
, "", NULL
, 0);
11550 gdb_assert (tu_group
->symtabs
== NULL
);
11551 gdb_assert (cu
->builder
== nullptr);
11552 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11553 cu
->builder
.reset (new struct buildsym_compunit
11554 (COMPUNIT_OBJFILE (cust
), "",
11555 COMPUNIT_DIRNAME (cust
),
11556 compunit_language (cust
),
11562 cu
->line_header
= lh
.release ();
11563 cu
->line_header_die_owner
= die
;
11567 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
11569 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11570 still initializing it, and our caller (a few levels up)
11571 process_full_type_unit still needs to know if this is the first
11574 tu_group
->num_symtabs
= cu
->line_header
->file_names
.size ();
11575 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
11576 cu
->line_header
->file_names
.size ());
11578 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
11580 file_entry
&fe
= cu
->line_header
->file_names
[i
];
11582 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (cu
->line_header
));
11584 if (cu
->builder
->get_current_subfile ()->symtab
== NULL
)
11586 /* NOTE: start_subfile will recognize when it's been
11587 passed a file it has already seen. So we can't
11588 assume there's a simple mapping from
11589 cu->line_header->file_names to subfiles, plus
11590 cu->line_header->file_names may contain dups. */
11591 cu
->builder
->get_current_subfile ()->symtab
11592 = allocate_symtab (cust
,
11593 cu
->builder
->get_current_subfile ()->name
);
11596 fe
.symtab
= cu
->builder
->get_current_subfile ()->symtab
;
11597 tu_group
->symtabs
[i
] = fe
.symtab
;
11602 gdb_assert (cu
->builder
== nullptr);
11603 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11604 cu
->builder
.reset (new struct buildsym_compunit
11605 (COMPUNIT_OBJFILE (cust
), "",
11606 COMPUNIT_DIRNAME (cust
),
11607 compunit_language (cust
),
11610 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
11612 file_entry
&fe
= cu
->line_header
->file_names
[i
];
11614 fe
.symtab
= tu_group
->symtabs
[i
];
11618 /* The main symtab is allocated last. Type units don't have DW_AT_name
11619 so they don't have a "real" (so to speak) symtab anyway.
11620 There is later code that will assign the main symtab to all symbols
11621 that don't have one. We need to handle the case of a symbol with a
11622 missing symtab (DW_AT_decl_file) anyway. */
11625 /* Process DW_TAG_type_unit.
11626 For TUs we want to skip the first top level sibling if it's not the
11627 actual type being defined by this TU. In this case the first top
11628 level sibling is there to provide context only. */
11631 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11633 struct die_info
*child_die
;
11635 prepare_one_comp_unit (cu
, die
, language_minimal
);
11637 /* Initialize (or reinitialize) the machinery for building symtabs.
11638 We do this before processing child DIEs, so that the line header table
11639 is available for DW_AT_decl_file. */
11640 setup_type_unit_groups (die
, cu
);
11642 if (die
->child
!= NULL
)
11644 child_die
= die
->child
;
11645 while (child_die
&& child_die
->tag
)
11647 process_die (child_die
, cu
);
11648 child_die
= sibling_die (child_die
);
11655 http://gcc.gnu.org/wiki/DebugFission
11656 http://gcc.gnu.org/wiki/DebugFissionDWP
11658 To simplify handling of both DWO files ("object" files with the DWARF info)
11659 and DWP files (a file with the DWOs packaged up into one file), we treat
11660 DWP files as having a collection of virtual DWO files. */
11663 hash_dwo_file (const void *item
)
11665 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11668 hash
= htab_hash_string (dwo_file
->dwo_name
);
11669 if (dwo_file
->comp_dir
!= NULL
)
11670 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11675 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11677 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11678 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11680 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11682 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11683 return lhs
->comp_dir
== rhs
->comp_dir
;
11684 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11687 /* Allocate a hash table for DWO files. */
11690 allocate_dwo_file_hash_table (struct objfile
*objfile
)
11692 return htab_create_alloc_ex (41,
11696 &objfile
->objfile_obstack
,
11697 hashtab_obstack_allocate
,
11698 dummy_obstack_deallocate
);
11701 /* Lookup DWO file DWO_NAME. */
11704 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11705 const char *dwo_name
,
11706 const char *comp_dir
)
11708 struct dwo_file find_entry
;
11711 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11712 dwarf2_per_objfile
->dwo_files
11713 = allocate_dwo_file_hash_table (dwarf2_per_objfile
->objfile
);
11715 memset (&find_entry
, 0, sizeof (find_entry
));
11716 find_entry
.dwo_name
= dwo_name
;
11717 find_entry
.comp_dir
= comp_dir
;
11718 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
11724 hash_dwo_unit (const void *item
)
11726 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11728 /* This drops the top 32 bits of the id, but is ok for a hash. */
11729 return dwo_unit
->signature
;
11733 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11735 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11736 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11738 /* The signature is assumed to be unique within the DWO file.
11739 So while object file CU dwo_id's always have the value zero,
11740 that's OK, assuming each object file DWO file has only one CU,
11741 and that's the rule for now. */
11742 return lhs
->signature
== rhs
->signature
;
11745 /* Allocate a hash table for DWO CUs,TUs.
11746 There is one of these tables for each of CUs,TUs for each DWO file. */
11749 allocate_dwo_unit_table (struct objfile
*objfile
)
11751 /* Start out with a pretty small number.
11752 Generally DWO files contain only one CU and maybe some TUs. */
11753 return htab_create_alloc_ex (3,
11757 &objfile
->objfile_obstack
,
11758 hashtab_obstack_allocate
,
11759 dummy_obstack_deallocate
);
11762 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
11764 struct create_dwo_cu_data
11766 struct dwo_file
*dwo_file
;
11767 struct dwo_unit dwo_unit
;
11770 /* die_reader_func for create_dwo_cu. */
11773 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11774 const gdb_byte
*info_ptr
,
11775 struct die_info
*comp_unit_die
,
11779 struct dwarf2_cu
*cu
= reader
->cu
;
11780 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11781 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11782 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
11783 struct dwo_file
*dwo_file
= data
->dwo_file
;
11784 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
11785 struct attribute
*attr
;
11787 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
11790 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11791 " its dwo_id [in module %s]"),
11792 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11796 dwo_unit
->dwo_file
= dwo_file
;
11797 dwo_unit
->signature
= DW_UNSND (attr
);
11798 dwo_unit
->section
= section
;
11799 dwo_unit
->sect_off
= sect_off
;
11800 dwo_unit
->length
= cu
->per_cu
->length
;
11802 if (dwarf_read_debug
)
11803 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11804 sect_offset_str (sect_off
),
11805 hex_string (dwo_unit
->signature
));
11808 /* Create the dwo_units for the CUs in a DWO_FILE.
11809 Note: This function processes DWO files only, not DWP files. */
11812 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11813 struct dwo_file
&dwo_file
, dwarf2_section_info
§ion
,
11816 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11817 const gdb_byte
*info_ptr
, *end_ptr
;
11819 dwarf2_read_section (objfile
, §ion
);
11820 info_ptr
= section
.buffer
;
11822 if (info_ptr
== NULL
)
11825 if (dwarf_read_debug
)
11827 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11828 get_section_name (§ion
),
11829 get_section_file_name (§ion
));
11832 end_ptr
= info_ptr
+ section
.size
;
11833 while (info_ptr
< end_ptr
)
11835 struct dwarf2_per_cu_data per_cu
;
11836 struct create_dwo_cu_data create_dwo_cu_data
;
11837 struct dwo_unit
*dwo_unit
;
11839 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11841 memset (&create_dwo_cu_data
.dwo_unit
, 0,
11842 sizeof (create_dwo_cu_data
.dwo_unit
));
11843 memset (&per_cu
, 0, sizeof (per_cu
));
11844 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11845 per_cu
.is_debug_types
= 0;
11846 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11847 per_cu
.section
= §ion
;
11848 create_dwo_cu_data
.dwo_file
= &dwo_file
;
11850 init_cutu_and_read_dies_no_follow (
11851 &per_cu
, &dwo_file
, create_dwo_cu_reader
, &create_dwo_cu_data
);
11852 info_ptr
+= per_cu
.length
;
11854 // If the unit could not be parsed, skip it.
11855 if (create_dwo_cu_data
.dwo_unit
.dwo_file
== NULL
)
11858 if (cus_htab
== NULL
)
11859 cus_htab
= allocate_dwo_unit_table (objfile
);
11861 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11862 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
11863 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
11864 gdb_assert (slot
!= NULL
);
11867 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11868 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11870 complaint (_("debug cu entry at offset %s is duplicate to"
11871 " the entry at offset %s, signature %s"),
11872 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11873 hex_string (dwo_unit
->signature
));
11875 *slot
= (void *)dwo_unit
;
11879 /* DWP file .debug_{cu,tu}_index section format:
11880 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11884 Both index sections have the same format, and serve to map a 64-bit
11885 signature to a set of section numbers. Each section begins with a header,
11886 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11887 indexes, and a pool of 32-bit section numbers. The index sections will be
11888 aligned at 8-byte boundaries in the file.
11890 The index section header consists of:
11892 V, 32 bit version number
11894 N, 32 bit number of compilation units or type units in the index
11895 M, 32 bit number of slots in the hash table
11897 Numbers are recorded using the byte order of the application binary.
11899 The hash table begins at offset 16 in the section, and consists of an array
11900 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11901 order of the application binary). Unused slots in the hash table are 0.
11902 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11904 The parallel table begins immediately after the hash table
11905 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11906 array of 32-bit indexes (using the byte order of the application binary),
11907 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11908 table contains a 32-bit index into the pool of section numbers. For unused
11909 hash table slots, the corresponding entry in the parallel table will be 0.
11911 The pool of section numbers begins immediately following the hash table
11912 (at offset 16 + 12 * M from the beginning of the section). The pool of
11913 section numbers consists of an array of 32-bit words (using the byte order
11914 of the application binary). Each item in the array is indexed starting
11915 from 0. The hash table entry provides the index of the first section
11916 number in the set. Additional section numbers in the set follow, and the
11917 set is terminated by a 0 entry (section number 0 is not used in ELF).
11919 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11920 section must be the first entry in the set, and the .debug_abbrev.dwo must
11921 be the second entry. Other members of the set may follow in any order.
11927 DWP Version 2 combines all the .debug_info, etc. sections into one,
11928 and the entries in the index tables are now offsets into these sections.
11929 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11932 Index Section Contents:
11934 Hash Table of Signatures dwp_hash_table.hash_table
11935 Parallel Table of Indices dwp_hash_table.unit_table
11936 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
11937 Table of Section Sizes dwp_hash_table.v2.sizes
11939 The index section header consists of:
11941 V, 32 bit version number
11942 L, 32 bit number of columns in the table of section offsets
11943 N, 32 bit number of compilation units or type units in the index
11944 M, 32 bit number of slots in the hash table
11946 Numbers are recorded using the byte order of the application binary.
11948 The hash table has the same format as version 1.
11949 The parallel table of indices has the same format as version 1,
11950 except that the entries are origin-1 indices into the table of sections
11951 offsets and the table of section sizes.
11953 The table of offsets begins immediately following the parallel table
11954 (at offset 16 + 12 * M from the beginning of the section). The table is
11955 a two-dimensional array of 32-bit words (using the byte order of the
11956 application binary), with L columns and N+1 rows, in row-major order.
11957 Each row in the array is indexed starting from 0. The first row provides
11958 a key to the remaining rows: each column in this row provides an identifier
11959 for a debug section, and the offsets in the same column of subsequent rows
11960 refer to that section. The section identifiers are:
11962 DW_SECT_INFO 1 .debug_info.dwo
11963 DW_SECT_TYPES 2 .debug_types.dwo
11964 DW_SECT_ABBREV 3 .debug_abbrev.dwo
11965 DW_SECT_LINE 4 .debug_line.dwo
11966 DW_SECT_LOC 5 .debug_loc.dwo
11967 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
11968 DW_SECT_MACINFO 7 .debug_macinfo.dwo
11969 DW_SECT_MACRO 8 .debug_macro.dwo
11971 The offsets provided by the CU and TU index sections are the base offsets
11972 for the contributions made by each CU or TU to the corresponding section
11973 in the package file. Each CU and TU header contains an abbrev_offset
11974 field, used to find the abbreviations table for that CU or TU within the
11975 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
11976 be interpreted as relative to the base offset given in the index section.
11977 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
11978 should be interpreted as relative to the base offset for .debug_line.dwo,
11979 and offsets into other debug sections obtained from DWARF attributes should
11980 also be interpreted as relative to the corresponding base offset.
11982 The table of sizes begins immediately following the table of offsets.
11983 Like the table of offsets, it is a two-dimensional array of 32-bit words,
11984 with L columns and N rows, in row-major order. Each row in the array is
11985 indexed starting from 1 (row 0 is shared by the two tables).
11989 Hash table lookup is handled the same in version 1 and 2:
11991 We assume that N and M will not exceed 2^32 - 1.
11992 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
11994 Given a 64-bit compilation unit signature or a type signature S, an entry
11995 in the hash table is located as follows:
11997 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
11998 the low-order k bits all set to 1.
12000 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
12002 3) If the hash table entry at index H matches the signature, use that
12003 entry. If the hash table entry at index H is unused (all zeroes),
12004 terminate the search: the signature is not present in the table.
12006 4) Let H = (H + H') modulo M. Repeat at Step 3.
12008 Because M > N and H' and M are relatively prime, the search is guaranteed
12009 to stop at an unused slot or find the match. */
12011 /* Create a hash table to map DWO IDs to their CU/TU entry in
12012 .debug_{info,types}.dwo in DWP_FILE.
12013 Returns NULL if there isn't one.
12014 Note: This function processes DWP files only, not DWO files. */
12016 static struct dwp_hash_table
*
12017 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12018 struct dwp_file
*dwp_file
, int is_debug_types
)
12020 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12021 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12022 const gdb_byte
*index_ptr
, *index_end
;
12023 struct dwarf2_section_info
*index
;
12024 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
12025 struct dwp_hash_table
*htab
;
12027 if (is_debug_types
)
12028 index
= &dwp_file
->sections
.tu_index
;
12030 index
= &dwp_file
->sections
.cu_index
;
12032 if (dwarf2_section_empty_p (index
))
12034 dwarf2_read_section (objfile
, index
);
12036 index_ptr
= index
->buffer
;
12037 index_end
= index_ptr
+ index
->size
;
12039 version
= read_4_bytes (dbfd
, index_ptr
);
12042 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
12046 nr_units
= read_4_bytes (dbfd
, index_ptr
);
12048 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
12051 if (version
!= 1 && version
!= 2)
12053 error (_("Dwarf Error: unsupported DWP file version (%s)"
12054 " [in module %s]"),
12055 pulongest (version
), dwp_file
->name
);
12057 if (nr_slots
!= (nr_slots
& -nr_slots
))
12059 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
12060 " is not power of 2 [in module %s]"),
12061 pulongest (nr_slots
), dwp_file
->name
);
12064 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
12065 htab
->version
= version
;
12066 htab
->nr_columns
= nr_columns
;
12067 htab
->nr_units
= nr_units
;
12068 htab
->nr_slots
= nr_slots
;
12069 htab
->hash_table
= index_ptr
;
12070 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
12072 /* Exit early if the table is empty. */
12073 if (nr_slots
== 0 || nr_units
== 0
12074 || (version
== 2 && nr_columns
== 0))
12076 /* All must be zero. */
12077 if (nr_slots
!= 0 || nr_units
!= 0
12078 || (version
== 2 && nr_columns
!= 0))
12080 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
12081 " all zero [in modules %s]"),
12089 htab
->section_pool
.v1
.indices
=
12090 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12091 /* It's harder to decide whether the section is too small in v1.
12092 V1 is deprecated anyway so we punt. */
12096 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12097 int *ids
= htab
->section_pool
.v2
.section_ids
;
12098 /* Reverse map for error checking. */
12099 int ids_seen
[DW_SECT_MAX
+ 1];
12102 if (nr_columns
< 2)
12104 error (_("Dwarf Error: bad DWP hash table, too few columns"
12105 " in section table [in module %s]"),
12108 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
12110 error (_("Dwarf Error: bad DWP hash table, too many columns"
12111 " in section table [in module %s]"),
12114 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
12115 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
12116 for (i
= 0; i
< nr_columns
; ++i
)
12118 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
12120 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
12122 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
12123 " in section table [in module %s]"),
12124 id
, dwp_file
->name
);
12126 if (ids_seen
[id
] != -1)
12128 error (_("Dwarf Error: bad DWP hash table, duplicate section"
12129 " id %d in section table [in module %s]"),
12130 id
, dwp_file
->name
);
12135 /* Must have exactly one info or types section. */
12136 if (((ids_seen
[DW_SECT_INFO
] != -1)
12137 + (ids_seen
[DW_SECT_TYPES
] != -1))
12140 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
12141 " DWO info/types section [in module %s]"),
12144 /* Must have an abbrev section. */
12145 if (ids_seen
[DW_SECT_ABBREV
] == -1)
12147 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
12148 " section [in module %s]"),
12151 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
12152 htab
->section_pool
.v2
.sizes
=
12153 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
12154 * nr_units
* nr_columns
);
12155 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
12156 * nr_units
* nr_columns
))
12159 error (_("Dwarf Error: DWP index section is corrupt (too small)"
12160 " [in module %s]"),
12168 /* Update SECTIONS with the data from SECTP.
12170 This function is like the other "locate" section routines that are
12171 passed to bfd_map_over_sections, but in this context the sections to
12172 read comes from the DWP V1 hash table, not the full ELF section table.
12174 The result is non-zero for success, or zero if an error was found. */
12177 locate_v1_virtual_dwo_sections (asection
*sectp
,
12178 struct virtual_v1_dwo_sections
*sections
)
12180 const struct dwop_section_names
*names
= &dwop_section_names
;
12182 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12184 /* There can be only one. */
12185 if (sections
->abbrev
.s
.section
!= NULL
)
12187 sections
->abbrev
.s
.section
= sectp
;
12188 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12190 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
12191 || section_is_p (sectp
->name
, &names
->types_dwo
))
12193 /* There can be only one. */
12194 if (sections
->info_or_types
.s
.section
!= NULL
)
12196 sections
->info_or_types
.s
.section
= sectp
;
12197 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
12199 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12201 /* There can be only one. */
12202 if (sections
->line
.s
.section
!= NULL
)
12204 sections
->line
.s
.section
= sectp
;
12205 sections
->line
.size
= bfd_get_section_size (sectp
);
12207 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12209 /* There can be only one. */
12210 if (sections
->loc
.s
.section
!= NULL
)
12212 sections
->loc
.s
.section
= sectp
;
12213 sections
->loc
.size
= bfd_get_section_size (sectp
);
12215 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12217 /* There can be only one. */
12218 if (sections
->macinfo
.s
.section
!= NULL
)
12220 sections
->macinfo
.s
.section
= sectp
;
12221 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12223 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12225 /* There can be only one. */
12226 if (sections
->macro
.s
.section
!= NULL
)
12228 sections
->macro
.s
.section
= sectp
;
12229 sections
->macro
.size
= bfd_get_section_size (sectp
);
12231 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12233 /* There can be only one. */
12234 if (sections
->str_offsets
.s
.section
!= NULL
)
12236 sections
->str_offsets
.s
.section
= sectp
;
12237 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12241 /* No other kind of section is valid. */
12248 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12249 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12250 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12251 This is for DWP version 1 files. */
12253 static struct dwo_unit
*
12254 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12255 struct dwp_file
*dwp_file
,
12256 uint32_t unit_index
,
12257 const char *comp_dir
,
12258 ULONGEST signature
, int is_debug_types
)
12260 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12261 const struct dwp_hash_table
*dwp_htab
=
12262 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12263 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12264 const char *kind
= is_debug_types
? "TU" : "CU";
12265 struct dwo_file
*dwo_file
;
12266 struct dwo_unit
*dwo_unit
;
12267 struct virtual_v1_dwo_sections sections
;
12268 void **dwo_file_slot
;
12271 gdb_assert (dwp_file
->version
== 1);
12273 if (dwarf_read_debug
)
12275 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
12277 pulongest (unit_index
), hex_string (signature
),
12281 /* Fetch the sections of this DWO unit.
12282 Put a limit on the number of sections we look for so that bad data
12283 doesn't cause us to loop forever. */
12285 #define MAX_NR_V1_DWO_SECTIONS \
12286 (1 /* .debug_info or .debug_types */ \
12287 + 1 /* .debug_abbrev */ \
12288 + 1 /* .debug_line */ \
12289 + 1 /* .debug_loc */ \
12290 + 1 /* .debug_str_offsets */ \
12291 + 1 /* .debug_macro or .debug_macinfo */ \
12292 + 1 /* trailing zero */)
12294 memset (§ions
, 0, sizeof (sections
));
12296 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
12299 uint32_t section_nr
=
12300 read_4_bytes (dbfd
,
12301 dwp_htab
->section_pool
.v1
.indices
12302 + (unit_index
+ i
) * sizeof (uint32_t));
12304 if (section_nr
== 0)
12306 if (section_nr
>= dwp_file
->num_sections
)
12308 error (_("Dwarf Error: bad DWP hash table, section number too large"
12309 " [in module %s]"),
12313 sectp
= dwp_file
->elf_sections
[section_nr
];
12314 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
12316 error (_("Dwarf Error: bad DWP hash table, invalid section found"
12317 " [in module %s]"),
12323 || dwarf2_section_empty_p (§ions
.info_or_types
)
12324 || dwarf2_section_empty_p (§ions
.abbrev
))
12326 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
12327 " [in module %s]"),
12330 if (i
== MAX_NR_V1_DWO_SECTIONS
)
12332 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
12333 " [in module %s]"),
12337 /* It's easier for the rest of the code if we fake a struct dwo_file and
12338 have dwo_unit "live" in that. At least for now.
12340 The DWP file can be made up of a random collection of CUs and TUs.
12341 However, for each CU + set of TUs that came from the same original DWO
12342 file, we can combine them back into a virtual DWO file to save space
12343 (fewer struct dwo_file objects to allocate). Remember that for really
12344 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12346 std::string virtual_dwo_name
=
12347 string_printf ("virtual-dwo/%d-%d-%d-%d",
12348 get_section_id (§ions
.abbrev
),
12349 get_section_id (§ions
.line
),
12350 get_section_id (§ions
.loc
),
12351 get_section_id (§ions
.str_offsets
));
12352 /* Can we use an existing virtual DWO file? */
12353 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12354 virtual_dwo_name
.c_str (),
12356 /* Create one if necessary. */
12357 if (*dwo_file_slot
== NULL
)
12359 if (dwarf_read_debug
)
12361 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12362 virtual_dwo_name
.c_str ());
12364 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12366 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12367 virtual_dwo_name
.c_str (),
12368 virtual_dwo_name
.size ());
12369 dwo_file
->comp_dir
= comp_dir
;
12370 dwo_file
->sections
.abbrev
= sections
.abbrev
;
12371 dwo_file
->sections
.line
= sections
.line
;
12372 dwo_file
->sections
.loc
= sections
.loc
;
12373 dwo_file
->sections
.macinfo
= sections
.macinfo
;
12374 dwo_file
->sections
.macro
= sections
.macro
;
12375 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
12376 /* The "str" section is global to the entire DWP file. */
12377 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12378 /* The info or types section is assigned below to dwo_unit,
12379 there's no need to record it in dwo_file.
12380 Also, we can't simply record type sections in dwo_file because
12381 we record a pointer into the vector in dwo_unit. As we collect more
12382 types we'll grow the vector and eventually have to reallocate space
12383 for it, invalidating all copies of pointers into the previous
12385 *dwo_file_slot
= dwo_file
;
12389 if (dwarf_read_debug
)
12391 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12392 virtual_dwo_name
.c_str ());
12394 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12397 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12398 dwo_unit
->dwo_file
= dwo_file
;
12399 dwo_unit
->signature
= signature
;
12400 dwo_unit
->section
=
12401 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12402 *dwo_unit
->section
= sections
.info_or_types
;
12403 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12408 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
12409 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
12410 piece within that section used by a TU/CU, return a virtual section
12411 of just that piece. */
12413 static struct dwarf2_section_info
12414 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12415 struct dwarf2_section_info
*section
,
12416 bfd_size_type offset
, bfd_size_type size
)
12418 struct dwarf2_section_info result
;
12421 gdb_assert (section
!= NULL
);
12422 gdb_assert (!section
->is_virtual
);
12424 memset (&result
, 0, sizeof (result
));
12425 result
.s
.containing_section
= section
;
12426 result
.is_virtual
= 1;
12431 sectp
= get_section_bfd_section (section
);
12433 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
12434 bounds of the real section. This is a pretty-rare event, so just
12435 flag an error (easier) instead of a warning and trying to cope. */
12437 || offset
+ size
> bfd_get_section_size (sectp
))
12439 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
12440 " in section %s [in module %s]"),
12441 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
12442 objfile_name (dwarf2_per_objfile
->objfile
));
12445 result
.virtual_offset
= offset
;
12446 result
.size
= size
;
12450 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12451 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12452 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12453 This is for DWP version 2 files. */
12455 static struct dwo_unit
*
12456 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12457 struct dwp_file
*dwp_file
,
12458 uint32_t unit_index
,
12459 const char *comp_dir
,
12460 ULONGEST signature
, int is_debug_types
)
12462 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12463 const struct dwp_hash_table
*dwp_htab
=
12464 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12465 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12466 const char *kind
= is_debug_types
? "TU" : "CU";
12467 struct dwo_file
*dwo_file
;
12468 struct dwo_unit
*dwo_unit
;
12469 struct virtual_v2_dwo_sections sections
;
12470 void **dwo_file_slot
;
12473 gdb_assert (dwp_file
->version
== 2);
12475 if (dwarf_read_debug
)
12477 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
12479 pulongest (unit_index
), hex_string (signature
),
12483 /* Fetch the section offsets of this DWO unit. */
12485 memset (§ions
, 0, sizeof (sections
));
12487 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12489 uint32_t offset
= read_4_bytes (dbfd
,
12490 dwp_htab
->section_pool
.v2
.offsets
12491 + (((unit_index
- 1) * dwp_htab
->nr_columns
12493 * sizeof (uint32_t)));
12494 uint32_t size
= read_4_bytes (dbfd
,
12495 dwp_htab
->section_pool
.v2
.sizes
12496 + (((unit_index
- 1) * dwp_htab
->nr_columns
12498 * sizeof (uint32_t)));
12500 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12503 case DW_SECT_TYPES
:
12504 sections
.info_or_types_offset
= offset
;
12505 sections
.info_or_types_size
= size
;
12507 case DW_SECT_ABBREV
:
12508 sections
.abbrev_offset
= offset
;
12509 sections
.abbrev_size
= size
;
12512 sections
.line_offset
= offset
;
12513 sections
.line_size
= size
;
12516 sections
.loc_offset
= offset
;
12517 sections
.loc_size
= size
;
12519 case DW_SECT_STR_OFFSETS
:
12520 sections
.str_offsets_offset
= offset
;
12521 sections
.str_offsets_size
= size
;
12523 case DW_SECT_MACINFO
:
12524 sections
.macinfo_offset
= offset
;
12525 sections
.macinfo_size
= size
;
12527 case DW_SECT_MACRO
:
12528 sections
.macro_offset
= offset
;
12529 sections
.macro_size
= size
;
12534 /* It's easier for the rest of the code if we fake a struct dwo_file and
12535 have dwo_unit "live" in that. At least for now.
12537 The DWP file can be made up of a random collection of CUs and TUs.
12538 However, for each CU + set of TUs that came from the same original DWO
12539 file, we can combine them back into a virtual DWO file to save space
12540 (fewer struct dwo_file objects to allocate). Remember that for really
12541 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12543 std::string virtual_dwo_name
=
12544 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12545 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12546 (long) (sections
.line_size
? sections
.line_offset
: 0),
12547 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12548 (long) (sections
.str_offsets_size
12549 ? sections
.str_offsets_offset
: 0));
12550 /* Can we use an existing virtual DWO file? */
12551 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12552 virtual_dwo_name
.c_str (),
12554 /* Create one if necessary. */
12555 if (*dwo_file_slot
== NULL
)
12557 if (dwarf_read_debug
)
12559 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12560 virtual_dwo_name
.c_str ());
12562 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12564 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12565 virtual_dwo_name
.c_str (),
12566 virtual_dwo_name
.size ());
12567 dwo_file
->comp_dir
= comp_dir
;
12568 dwo_file
->sections
.abbrev
=
12569 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
12570 sections
.abbrev_offset
, sections
.abbrev_size
);
12571 dwo_file
->sections
.line
=
12572 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
12573 sections
.line_offset
, sections
.line_size
);
12574 dwo_file
->sections
.loc
=
12575 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12576 sections
.loc_offset
, sections
.loc_size
);
12577 dwo_file
->sections
.macinfo
=
12578 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12579 sections
.macinfo_offset
, sections
.macinfo_size
);
12580 dwo_file
->sections
.macro
=
12581 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12582 sections
.macro_offset
, sections
.macro_size
);
12583 dwo_file
->sections
.str_offsets
=
12584 create_dwp_v2_section (dwarf2_per_objfile
,
12585 &dwp_file
->sections
.str_offsets
,
12586 sections
.str_offsets_offset
,
12587 sections
.str_offsets_size
);
12588 /* The "str" section is global to the entire DWP file. */
12589 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12590 /* The info or types section is assigned below to dwo_unit,
12591 there's no need to record it in dwo_file.
12592 Also, we can't simply record type sections in dwo_file because
12593 we record a pointer into the vector in dwo_unit. As we collect more
12594 types we'll grow the vector and eventually have to reallocate space
12595 for it, invalidating all copies of pointers into the previous
12597 *dwo_file_slot
= dwo_file
;
12601 if (dwarf_read_debug
)
12603 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12604 virtual_dwo_name
.c_str ());
12606 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12609 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12610 dwo_unit
->dwo_file
= dwo_file
;
12611 dwo_unit
->signature
= signature
;
12612 dwo_unit
->section
=
12613 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12614 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12616 ? &dwp_file
->sections
.types
12617 : &dwp_file
->sections
.info
,
12618 sections
.info_or_types_offset
,
12619 sections
.info_or_types_size
);
12620 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12625 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12626 Returns NULL if the signature isn't found. */
12628 static struct dwo_unit
*
12629 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12630 struct dwp_file
*dwp_file
, const char *comp_dir
,
12631 ULONGEST signature
, int is_debug_types
)
12633 const struct dwp_hash_table
*dwp_htab
=
12634 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12635 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12636 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12637 uint32_t hash
= signature
& mask
;
12638 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12641 struct dwo_unit find_dwo_cu
;
12643 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12644 find_dwo_cu
.signature
= signature
;
12645 slot
= htab_find_slot (is_debug_types
12646 ? dwp_file
->loaded_tus
12647 : dwp_file
->loaded_cus
,
12648 &find_dwo_cu
, INSERT
);
12651 return (struct dwo_unit
*) *slot
;
12653 /* Use a for loop so that we don't loop forever on bad debug info. */
12654 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12656 ULONGEST signature_in_table
;
12658 signature_in_table
=
12659 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12660 if (signature_in_table
== signature
)
12662 uint32_t unit_index
=
12663 read_4_bytes (dbfd
,
12664 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12666 if (dwp_file
->version
== 1)
12668 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12669 dwp_file
, unit_index
,
12670 comp_dir
, signature
,
12675 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12676 dwp_file
, unit_index
,
12677 comp_dir
, signature
,
12680 return (struct dwo_unit
*) *slot
;
12682 if (signature_in_table
== 0)
12684 hash
= (hash
+ hash2
) & mask
;
12687 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12688 " [in module %s]"),
12692 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12693 Open the file specified by FILE_NAME and hand it off to BFD for
12694 preliminary analysis. Return a newly initialized bfd *, which
12695 includes a canonicalized copy of FILE_NAME.
12696 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12697 SEARCH_CWD is true if the current directory is to be searched.
12698 It will be searched before debug-file-directory.
12699 If successful, the file is added to the bfd include table of the
12700 objfile's bfd (see gdb_bfd_record_inclusion).
12701 If unable to find/open the file, return NULL.
12702 NOTE: This function is derived from symfile_bfd_open. */
12704 static gdb_bfd_ref_ptr
12705 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12706 const char *file_name
, int is_dwp
, int search_cwd
)
12709 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12710 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12711 to debug_file_directory. */
12712 const char *search_path
;
12713 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12715 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12718 if (*debug_file_directory
!= '\0')
12720 search_path_holder
.reset (concat (".", dirname_separator_string
,
12721 debug_file_directory
,
12723 search_path
= search_path_holder
.get ();
12729 search_path
= debug_file_directory
;
12731 openp_flags flags
= OPF_RETURN_REALPATH
;
12733 flags
|= OPF_SEARCH_IN_PATH
;
12735 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12736 desc
= openp (search_path
, flags
, file_name
,
12737 O_RDONLY
| O_BINARY
, &absolute_name
);
12741 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12743 if (sym_bfd
== NULL
)
12745 bfd_set_cacheable (sym_bfd
.get (), 1);
12747 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12750 /* Success. Record the bfd as having been included by the objfile's bfd.
12751 This is important because things like demangled_names_hash lives in the
12752 objfile's per_bfd space and may have references to things like symbol
12753 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12754 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12759 /* Try to open DWO file FILE_NAME.
12760 COMP_DIR is the DW_AT_comp_dir attribute.
12761 The result is the bfd handle of the file.
12762 If there is a problem finding or opening the file, return NULL.
12763 Upon success, the canonicalized path of the file is stored in the bfd,
12764 same as symfile_bfd_open. */
12766 static gdb_bfd_ref_ptr
12767 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12768 const char *file_name
, const char *comp_dir
)
12770 if (IS_ABSOLUTE_PATH (file_name
))
12771 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12772 0 /*is_dwp*/, 0 /*search_cwd*/);
12774 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12776 if (comp_dir
!= NULL
)
12778 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
12779 file_name
, (char *) NULL
);
12781 /* NOTE: If comp_dir is a relative path, this will also try the
12782 search path, which seems useful. */
12783 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12786 1 /*search_cwd*/));
12787 xfree (path_to_try
);
12792 /* That didn't work, try debug-file-directory, which, despite its name,
12793 is a list of paths. */
12795 if (*debug_file_directory
== '\0')
12798 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12799 0 /*is_dwp*/, 1 /*search_cwd*/);
12802 /* This function is mapped across the sections and remembers the offset and
12803 size of each of the DWO debugging sections we are interested in. */
12806 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12808 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12809 const struct dwop_section_names
*names
= &dwop_section_names
;
12811 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12813 dwo_sections
->abbrev
.s
.section
= sectp
;
12814 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12816 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12818 dwo_sections
->info
.s
.section
= sectp
;
12819 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
12821 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12823 dwo_sections
->line
.s
.section
= sectp
;
12824 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
12826 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12828 dwo_sections
->loc
.s
.section
= sectp
;
12829 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
12831 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12833 dwo_sections
->macinfo
.s
.section
= sectp
;
12834 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12836 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12838 dwo_sections
->macro
.s
.section
= sectp
;
12839 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
12841 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12843 dwo_sections
->str
.s
.section
= sectp
;
12844 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
12846 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12848 dwo_sections
->str_offsets
.s
.section
= sectp
;
12849 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12851 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12853 struct dwarf2_section_info type_section
;
12855 memset (&type_section
, 0, sizeof (type_section
));
12856 type_section
.s
.section
= sectp
;
12857 type_section
.size
= bfd_get_section_size (sectp
);
12858 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
12863 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12864 by PER_CU. This is for the non-DWP case.
12865 The result is NULL if DWO_NAME can't be found. */
12867 static struct dwo_file
*
12868 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12869 const char *dwo_name
, const char *comp_dir
)
12871 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12872 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12874 gdb_bfd_ref_ptr
dbfd (open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
));
12877 if (dwarf_read_debug
)
12878 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12882 /* We use a unique pointer here, despite the obstack allocation,
12883 because a dwo_file needs some cleanup if it is abandoned. */
12884 dwo_file_up
dwo_file (OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
12886 dwo_file
->dwo_name
= dwo_name
;
12887 dwo_file
->comp_dir
= comp_dir
;
12888 dwo_file
->dbfd
= dbfd
.release ();
12890 bfd_map_over_sections (dwo_file
->dbfd
, dwarf2_locate_dwo_sections
,
12891 &dwo_file
->sections
);
12893 create_cus_hash_table (dwarf2_per_objfile
, *dwo_file
, dwo_file
->sections
.info
,
12896 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
12897 dwo_file
->sections
.types
, dwo_file
->tus
);
12899 if (dwarf_read_debug
)
12900 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
12902 return dwo_file
.release ();
12905 /* This function is mapped across the sections and remembers the offset and
12906 size of each of the DWP debugging sections common to version 1 and 2 that
12907 we are interested in. */
12910 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12911 void *dwp_file_ptr
)
12913 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12914 const struct dwop_section_names
*names
= &dwop_section_names
;
12915 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12917 /* Record the ELF section number for later lookup: this is what the
12918 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12919 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12920 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12922 /* Look for specific sections that we need. */
12923 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12925 dwp_file
->sections
.str
.s
.section
= sectp
;
12926 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
12928 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12930 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12931 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
12933 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12935 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12936 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
12940 /* This function is mapped across the sections and remembers the offset and
12941 size of each of the DWP version 2 debugging sections that we are interested
12942 in. This is split into a separate function because we don't know if we
12943 have version 1 or 2 until we parse the cu_index/tu_index sections. */
12946 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12948 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12949 const struct dwop_section_names
*names
= &dwop_section_names
;
12950 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12952 /* Record the ELF section number for later lookup: this is what the
12953 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12954 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12955 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12957 /* Look for specific sections that we need. */
12958 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12960 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12961 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
12963 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12965 dwp_file
->sections
.info
.s
.section
= sectp
;
12966 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
12968 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12970 dwp_file
->sections
.line
.s
.section
= sectp
;
12971 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
12973 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12975 dwp_file
->sections
.loc
.s
.section
= sectp
;
12976 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
12978 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12980 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
12981 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
12983 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12985 dwp_file
->sections
.macro
.s
.section
= sectp
;
12986 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
12988 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12990 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
12991 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
12993 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12995 dwp_file
->sections
.types
.s
.section
= sectp
;
12996 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
13000 /* Hash function for dwp_file loaded CUs/TUs. */
13003 hash_dwp_loaded_cutus (const void *item
)
13005 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
13007 /* This drops the top 32 bits of the signature, but is ok for a hash. */
13008 return dwo_unit
->signature
;
13011 /* Equality function for dwp_file loaded CUs/TUs. */
13014 eq_dwp_loaded_cutus (const void *a
, const void *b
)
13016 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
13017 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
13019 return dua
->signature
== dub
->signature
;
13022 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
13025 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
13027 return htab_create_alloc_ex (3,
13028 hash_dwp_loaded_cutus
,
13029 eq_dwp_loaded_cutus
,
13031 &objfile
->objfile_obstack
,
13032 hashtab_obstack_allocate
,
13033 dummy_obstack_deallocate
);
13036 /* Try to open DWP file FILE_NAME.
13037 The result is the bfd handle of the file.
13038 If there is a problem finding or opening the file, return NULL.
13039 Upon success, the canonicalized path of the file is stored in the bfd,
13040 same as symfile_bfd_open. */
13042 static gdb_bfd_ref_ptr
13043 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
13044 const char *file_name
)
13046 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
13048 1 /*search_cwd*/));
13052 /* Work around upstream bug 15652.
13053 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
13054 [Whether that's a "bug" is debatable, but it is getting in our way.]
13055 We have no real idea where the dwp file is, because gdb's realpath-ing
13056 of the executable's path may have discarded the needed info.
13057 [IWBN if the dwp file name was recorded in the executable, akin to
13058 .gnu_debuglink, but that doesn't exist yet.]
13059 Strip the directory from FILE_NAME and search again. */
13060 if (*debug_file_directory
!= '\0')
13062 /* Don't implicitly search the current directory here.
13063 If the user wants to search "." to handle this case,
13064 it must be added to debug-file-directory. */
13065 return try_open_dwop_file (dwarf2_per_objfile
,
13066 lbasename (file_name
), 1 /*is_dwp*/,
13073 /* Initialize the use of the DWP file for the current objfile.
13074 By convention the name of the DWP file is ${objfile}.dwp.
13075 The result is NULL if it can't be found. */
13077 static std::unique_ptr
<struct dwp_file
>
13078 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13080 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13082 /* Try to find first .dwp for the binary file before any symbolic links
13085 /* If the objfile is a debug file, find the name of the real binary
13086 file and get the name of dwp file from there. */
13087 std::string dwp_name
;
13088 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
13090 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
13091 const char *backlink_basename
= lbasename (backlink
->original_name
);
13093 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
13096 dwp_name
= objfile
->original_name
;
13098 dwp_name
+= ".dwp";
13100 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
13102 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
13104 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
13105 dwp_name
= objfile_name (objfile
);
13106 dwp_name
+= ".dwp";
13107 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
13112 if (dwarf_read_debug
)
13113 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
13114 return std::unique_ptr
<dwp_file
> ();
13117 const char *name
= bfd_get_filename (dbfd
.get ());
13118 std::unique_ptr
<struct dwp_file
> dwp_file
13119 (new struct dwp_file (name
, std::move (dbfd
)));
13121 /* +1: section 0 is unused */
13122 dwp_file
->num_sections
= bfd_count_sections (dwp_file
->dbfd
) + 1;
13123 dwp_file
->elf_sections
=
13124 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
13125 dwp_file
->num_sections
, asection
*);
13127 bfd_map_over_sections (dwp_file
->dbfd
.get (),
13128 dwarf2_locate_common_dwp_sections
,
13131 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
13134 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
13137 /* The DWP file version is stored in the hash table. Oh well. */
13138 if (dwp_file
->cus
&& dwp_file
->tus
13139 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
13141 /* Technically speaking, we should try to limp along, but this is
13142 pretty bizarre. We use pulongest here because that's the established
13143 portability solution (e.g, we cannot use %u for uint32_t). */
13144 error (_("Dwarf Error: DWP file CU version %s doesn't match"
13145 " TU version %s [in DWP file %s]"),
13146 pulongest (dwp_file
->cus
->version
),
13147 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
13151 dwp_file
->version
= dwp_file
->cus
->version
;
13152 else if (dwp_file
->tus
)
13153 dwp_file
->version
= dwp_file
->tus
->version
;
13155 dwp_file
->version
= 2;
13157 if (dwp_file
->version
== 2)
13158 bfd_map_over_sections (dwp_file
->dbfd
.get (),
13159 dwarf2_locate_v2_dwp_sections
,
13162 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
13163 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
13165 if (dwarf_read_debug
)
13167 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
13168 fprintf_unfiltered (gdb_stdlog
,
13169 " %s CUs, %s TUs\n",
13170 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
13171 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
13177 /* Wrapper around open_and_init_dwp_file, only open it once. */
13179 static struct dwp_file
*
13180 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13182 if (! dwarf2_per_objfile
->dwp_checked
)
13184 dwarf2_per_objfile
->dwp_file
13185 = open_and_init_dwp_file (dwarf2_per_objfile
);
13186 dwarf2_per_objfile
->dwp_checked
= 1;
13188 return dwarf2_per_objfile
->dwp_file
.get ();
13191 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
13192 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
13193 or in the DWP file for the objfile, referenced by THIS_UNIT.
13194 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
13195 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
13197 This is called, for example, when wanting to read a variable with a
13198 complex location. Therefore we don't want to do file i/o for every call.
13199 Therefore we don't want to look for a DWO file on every call.
13200 Therefore we first see if we've already seen SIGNATURE in a DWP file,
13201 then we check if we've already seen DWO_NAME, and only THEN do we check
13204 The result is a pointer to the dwo_unit object or NULL if we didn't find it
13205 (dwo_id mismatch or couldn't find the DWO/DWP file). */
13207 static struct dwo_unit
*
13208 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
13209 const char *dwo_name
, const char *comp_dir
,
13210 ULONGEST signature
, int is_debug_types
)
13212 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
13213 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13214 const char *kind
= is_debug_types
? "TU" : "CU";
13215 void **dwo_file_slot
;
13216 struct dwo_file
*dwo_file
;
13217 struct dwp_file
*dwp_file
;
13219 /* First see if there's a DWP file.
13220 If we have a DWP file but didn't find the DWO inside it, don't
13221 look for the original DWO file. It makes gdb behave differently
13222 depending on whether one is debugging in the build tree. */
13224 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
13225 if (dwp_file
!= NULL
)
13227 const struct dwp_hash_table
*dwp_htab
=
13228 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
13230 if (dwp_htab
!= NULL
)
13232 struct dwo_unit
*dwo_cutu
=
13233 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
13234 signature
, is_debug_types
);
13236 if (dwo_cutu
!= NULL
)
13238 if (dwarf_read_debug
)
13240 fprintf_unfiltered (gdb_stdlog
,
13241 "Virtual DWO %s %s found: @%s\n",
13242 kind
, hex_string (signature
),
13243 host_address_to_string (dwo_cutu
));
13251 /* No DWP file, look for the DWO file. */
13253 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
13254 dwo_name
, comp_dir
);
13255 if (*dwo_file_slot
== NULL
)
13257 /* Read in the file and build a table of the CUs/TUs it contains. */
13258 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
13260 /* NOTE: This will be NULL if unable to open the file. */
13261 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
13263 if (dwo_file
!= NULL
)
13265 struct dwo_unit
*dwo_cutu
= NULL
;
13267 if (is_debug_types
&& dwo_file
->tus
)
13269 struct dwo_unit find_dwo_cutu
;
13271 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13272 find_dwo_cutu
.signature
= signature
;
13274 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
13276 else if (!is_debug_types
&& dwo_file
->cus
)
13278 struct dwo_unit find_dwo_cutu
;
13280 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13281 find_dwo_cutu
.signature
= signature
;
13282 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
13286 if (dwo_cutu
!= NULL
)
13288 if (dwarf_read_debug
)
13290 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
13291 kind
, dwo_name
, hex_string (signature
),
13292 host_address_to_string (dwo_cutu
));
13299 /* We didn't find it. This could mean a dwo_id mismatch, or
13300 someone deleted the DWO/DWP file, or the search path isn't set up
13301 correctly to find the file. */
13303 if (dwarf_read_debug
)
13305 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
13306 kind
, dwo_name
, hex_string (signature
));
13309 /* This is a warning and not a complaint because it can be caused by
13310 pilot error (e.g., user accidentally deleting the DWO). */
13312 /* Print the name of the DWP file if we looked there, helps the user
13313 better diagnose the problem. */
13314 std::string dwp_text
;
13316 if (dwp_file
!= NULL
)
13317 dwp_text
= string_printf (" [in DWP file %s]",
13318 lbasename (dwp_file
->name
));
13320 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
13321 " [in module %s]"),
13322 kind
, dwo_name
, hex_string (signature
),
13324 this_unit
->is_debug_types
? "TU" : "CU",
13325 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
13330 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
13331 See lookup_dwo_cutu_unit for details. */
13333 static struct dwo_unit
*
13334 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
13335 const char *dwo_name
, const char *comp_dir
,
13336 ULONGEST signature
)
13338 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
13341 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
13342 See lookup_dwo_cutu_unit for details. */
13344 static struct dwo_unit
*
13345 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
13346 const char *dwo_name
, const char *comp_dir
)
13348 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
13351 /* Traversal function for queue_and_load_all_dwo_tus. */
13354 queue_and_load_dwo_tu (void **slot
, void *info
)
13356 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
13357 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
13358 ULONGEST signature
= dwo_unit
->signature
;
13359 struct signatured_type
*sig_type
=
13360 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
13362 if (sig_type
!= NULL
)
13364 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
13366 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
13367 a real dependency of PER_CU on SIG_TYPE. That is detected later
13368 while processing PER_CU. */
13369 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
13370 load_full_type_unit (sig_cu
);
13371 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
13377 /* Queue all TUs contained in the DWO of PER_CU to be read in.
13378 The DWO may have the only definition of the type, though it may not be
13379 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
13380 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
13383 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
13385 struct dwo_unit
*dwo_unit
;
13386 struct dwo_file
*dwo_file
;
13388 gdb_assert (!per_cu
->is_debug_types
);
13389 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
13390 gdb_assert (per_cu
->cu
!= NULL
);
13392 dwo_unit
= per_cu
->cu
->dwo_unit
;
13393 gdb_assert (dwo_unit
!= NULL
);
13395 dwo_file
= dwo_unit
->dwo_file
;
13396 if (dwo_file
->tus
!= NULL
)
13397 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
13400 /* Free all resources associated with DWO_FILE.
13401 Close the DWO file and munmap the sections. */
13404 free_dwo_file (struct dwo_file
*dwo_file
)
13406 /* Note: dbfd is NULL for virtual DWO files. */
13407 gdb_bfd_unref (dwo_file
->dbfd
);
13409 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
13412 /* Traversal function for free_dwo_files. */
13415 free_dwo_file_from_slot (void **slot
, void *info
)
13417 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
13419 free_dwo_file (dwo_file
);
13424 /* Free all resources associated with DWO_FILES. */
13427 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
13429 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
13432 /* Read in various DIEs. */
13434 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
13435 Inherit only the children of the DW_AT_abstract_origin DIE not being
13436 already referenced by DW_AT_abstract_origin from the children of the
13440 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
13442 struct die_info
*child_die
;
13443 sect_offset
*offsetp
;
13444 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
13445 struct die_info
*origin_die
;
13446 /* Iterator of the ORIGIN_DIE children. */
13447 struct die_info
*origin_child_die
;
13448 struct attribute
*attr
;
13449 struct dwarf2_cu
*origin_cu
;
13450 struct pending
**origin_previous_list_in_scope
;
13452 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13456 /* Note that following die references may follow to a die in a
13460 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
13462 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
13464 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
13465 origin_cu
->list_in_scope
= cu
->list_in_scope
;
13467 if (die
->tag
!= origin_die
->tag
13468 && !(die
->tag
== DW_TAG_inlined_subroutine
13469 && origin_die
->tag
== DW_TAG_subprogram
))
13470 complaint (_("DIE %s and its abstract origin %s have different tags"),
13471 sect_offset_str (die
->sect_off
),
13472 sect_offset_str (origin_die
->sect_off
));
13474 std::vector
<sect_offset
> offsets
;
13476 for (child_die
= die
->child
;
13477 child_die
&& child_die
->tag
;
13478 child_die
= sibling_die (child_die
))
13480 struct die_info
*child_origin_die
;
13481 struct dwarf2_cu
*child_origin_cu
;
13483 /* We are trying to process concrete instance entries:
13484 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
13485 it's not relevant to our analysis here. i.e. detecting DIEs that are
13486 present in the abstract instance but not referenced in the concrete
13488 if (child_die
->tag
== DW_TAG_call_site
13489 || child_die
->tag
== DW_TAG_GNU_call_site
)
13492 /* For each CHILD_DIE, find the corresponding child of
13493 ORIGIN_DIE. If there is more than one layer of
13494 DW_AT_abstract_origin, follow them all; there shouldn't be,
13495 but GCC versions at least through 4.4 generate this (GCC PR
13497 child_origin_die
= child_die
;
13498 child_origin_cu
= cu
;
13501 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
13505 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
13509 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
13510 counterpart may exist. */
13511 if (child_origin_die
!= child_die
)
13513 if (child_die
->tag
!= child_origin_die
->tag
13514 && !(child_die
->tag
== DW_TAG_inlined_subroutine
13515 && child_origin_die
->tag
== DW_TAG_subprogram
))
13516 complaint (_("Child DIE %s and its abstract origin %s have "
13518 sect_offset_str (child_die
->sect_off
),
13519 sect_offset_str (child_origin_die
->sect_off
));
13520 if (child_origin_die
->parent
!= origin_die
)
13521 complaint (_("Child DIE %s and its abstract origin %s have "
13522 "different parents"),
13523 sect_offset_str (child_die
->sect_off
),
13524 sect_offset_str (child_origin_die
->sect_off
));
13526 offsets
.push_back (child_origin_die
->sect_off
);
13529 std::sort (offsets
.begin (), offsets
.end ());
13530 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
13531 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
13532 if (offsetp
[-1] == *offsetp
)
13533 complaint (_("Multiple children of DIE %s refer "
13534 "to DIE %s as their abstract origin"),
13535 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
13537 offsetp
= offsets
.data ();
13538 origin_child_die
= origin_die
->child
;
13539 while (origin_child_die
&& origin_child_die
->tag
)
13541 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13542 while (offsetp
< offsets_end
13543 && *offsetp
< origin_child_die
->sect_off
)
13545 if (offsetp
>= offsets_end
13546 || *offsetp
> origin_child_die
->sect_off
)
13548 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13549 Check whether we're already processing ORIGIN_CHILD_DIE.
13550 This can happen with mutually referenced abstract_origins.
13552 if (!origin_child_die
->in_process
)
13553 process_die (origin_child_die
, origin_cu
);
13555 origin_child_die
= sibling_die (origin_child_die
);
13557 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13561 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13563 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13564 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13565 struct context_stack
*newobj
;
13568 struct die_info
*child_die
;
13569 struct attribute
*attr
, *call_line
, *call_file
;
13571 CORE_ADDR baseaddr
;
13572 struct block
*block
;
13573 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13574 std::vector
<struct symbol
*> template_args
;
13575 struct template_symbol
*templ_func
= NULL
;
13579 /* If we do not have call site information, we can't show the
13580 caller of this inlined function. That's too confusing, so
13581 only use the scope for local variables. */
13582 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13583 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13584 if (call_line
== NULL
|| call_file
== NULL
)
13586 read_lexical_block_scope (die
, cu
);
13591 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13593 name
= dwarf2_name (die
, cu
);
13595 /* Ignore functions with missing or empty names. These are actually
13596 illegal according to the DWARF standard. */
13599 complaint (_("missing name for subprogram DIE at %s"),
13600 sect_offset_str (die
->sect_off
));
13604 /* Ignore functions with missing or invalid low and high pc attributes. */
13605 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13606 <= PC_BOUNDS_INVALID
)
13608 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13609 if (!attr
|| !DW_UNSND (attr
))
13610 complaint (_("cannot get low and high bounds "
13611 "for subprogram DIE at %s"),
13612 sect_offset_str (die
->sect_off
));
13616 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13617 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13619 /* If we have any template arguments, then we must allocate a
13620 different sort of symbol. */
13621 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
13623 if (child_die
->tag
== DW_TAG_template_type_param
13624 || child_die
->tag
== DW_TAG_template_value_param
)
13626 templ_func
= allocate_template_symbol (objfile
);
13627 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13632 newobj
= cu
->builder
->push_context (0, lowpc
);
13633 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13634 (struct symbol
*) templ_func
);
13636 /* If there is a location expression for DW_AT_frame_base, record
13638 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13640 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13642 /* If there is a location for the static link, record it. */
13643 newobj
->static_link
= NULL
;
13644 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13647 newobj
->static_link
13648 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13649 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
13652 cu
->list_in_scope
= cu
->builder
->get_local_symbols ();
13654 if (die
->child
!= NULL
)
13656 child_die
= die
->child
;
13657 while (child_die
&& child_die
->tag
)
13659 if (child_die
->tag
== DW_TAG_template_type_param
13660 || child_die
->tag
== DW_TAG_template_value_param
)
13662 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13665 template_args
.push_back (arg
);
13668 process_die (child_die
, cu
);
13669 child_die
= sibling_die (child_die
);
13673 inherit_abstract_dies (die
, cu
);
13675 /* If we have a DW_AT_specification, we might need to import using
13676 directives from the context of the specification DIE. See the
13677 comment in determine_prefix. */
13678 if (cu
->language
== language_cplus
13679 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13681 struct dwarf2_cu
*spec_cu
= cu
;
13682 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13686 child_die
= spec_die
->child
;
13687 while (child_die
&& child_die
->tag
)
13689 if (child_die
->tag
== DW_TAG_imported_module
)
13690 process_die (child_die
, spec_cu
);
13691 child_die
= sibling_die (child_die
);
13694 /* In some cases, GCC generates specification DIEs that
13695 themselves contain DW_AT_specification attributes. */
13696 spec_die
= die_specification (spec_die
, &spec_cu
);
13700 struct context_stack cstk
= cu
->builder
->pop_context ();
13701 /* Make a block for the local symbols within. */
13702 block
= cu
->builder
->finish_block (cstk
.name
, cstk
.old_blocks
,
13703 cstk
.static_link
, lowpc
, highpc
);
13705 /* For C++, set the block's scope. */
13706 if ((cu
->language
== language_cplus
13707 || cu
->language
== language_fortran
13708 || cu
->language
== language_d
13709 || cu
->language
== language_rust
)
13710 && cu
->processing_has_namespace_info
)
13711 block_set_scope (block
, determine_prefix (die
, cu
),
13712 &objfile
->objfile_obstack
);
13714 /* If we have address ranges, record them. */
13715 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13717 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
13719 /* Attach template arguments to function. */
13720 if (!template_args
.empty ())
13722 gdb_assert (templ_func
!= NULL
);
13724 templ_func
->n_template_arguments
= template_args
.size ();
13725 templ_func
->template_arguments
13726 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13727 templ_func
->n_template_arguments
);
13728 memcpy (templ_func
->template_arguments
,
13729 template_args
.data (),
13730 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13733 /* In C++, we can have functions nested inside functions (e.g., when
13734 a function declares a class that has methods). This means that
13735 when we finish processing a function scope, we may need to go
13736 back to building a containing block's symbol lists. */
13737 *cu
->builder
->get_local_symbols () = cstk
.locals
;
13738 cu
->builder
->set_local_using_directives (cstk
.local_using_directives
);
13740 /* If we've finished processing a top-level function, subsequent
13741 symbols go in the file symbol list. */
13742 if (cu
->builder
->outermost_context_p ())
13743 cu
->list_in_scope
= cu
->builder
->get_file_symbols ();
13746 /* Process all the DIES contained within a lexical block scope. Start
13747 a new scope, process the dies, and then close the scope. */
13750 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13752 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13753 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13754 CORE_ADDR lowpc
, highpc
;
13755 struct die_info
*child_die
;
13756 CORE_ADDR baseaddr
;
13758 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13760 /* Ignore blocks with missing or invalid low and high pc attributes. */
13761 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13762 as multiple lexical blocks? Handling children in a sane way would
13763 be nasty. Might be easier to properly extend generic blocks to
13764 describe ranges. */
13765 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13767 case PC_BOUNDS_NOT_PRESENT
:
13768 /* DW_TAG_lexical_block has no attributes, process its children as if
13769 there was no wrapping by that DW_TAG_lexical_block.
13770 GCC does no longer produces such DWARF since GCC r224161. */
13771 for (child_die
= die
->child
;
13772 child_die
!= NULL
&& child_die
->tag
;
13773 child_die
= sibling_die (child_die
))
13774 process_die (child_die
, cu
);
13776 case PC_BOUNDS_INVALID
:
13779 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13780 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13782 cu
->builder
->push_context (0, lowpc
);
13783 if (die
->child
!= NULL
)
13785 child_die
= die
->child
;
13786 while (child_die
&& child_die
->tag
)
13788 process_die (child_die
, cu
);
13789 child_die
= sibling_die (child_die
);
13792 inherit_abstract_dies (die
, cu
);
13793 struct context_stack cstk
= cu
->builder
->pop_context ();
13795 if (*cu
->builder
->get_local_symbols () != NULL
13796 || (*cu
->builder
->get_local_using_directives ()) != NULL
)
13798 struct block
*block
13799 = cu
->builder
->finish_block (0, cstk
.old_blocks
, NULL
,
13800 cstk
.start_addr
, highpc
);
13802 /* Note that recording ranges after traversing children, as we
13803 do here, means that recording a parent's ranges entails
13804 walking across all its children's ranges as they appear in
13805 the address map, which is quadratic behavior.
13807 It would be nicer to record the parent's ranges before
13808 traversing its children, simply overriding whatever you find
13809 there. But since we don't even decide whether to create a
13810 block until after we've traversed its children, that's hard
13812 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13814 *cu
->builder
->get_local_symbols () = cstk
.locals
;
13815 cu
->builder
->set_local_using_directives (cstk
.local_using_directives
);
13818 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13821 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13823 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13824 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13825 CORE_ADDR pc
, baseaddr
;
13826 struct attribute
*attr
;
13827 struct call_site
*call_site
, call_site_local
;
13830 struct die_info
*child_die
;
13832 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13834 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13837 /* This was a pre-DWARF-5 GNU extension alias
13838 for DW_AT_call_return_pc. */
13839 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13843 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13844 "DIE %s [in module %s]"),
13845 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13848 pc
= attr_value_as_address (attr
) + baseaddr
;
13849 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13851 if (cu
->call_site_htab
== NULL
)
13852 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13853 NULL
, &objfile
->objfile_obstack
,
13854 hashtab_obstack_allocate
, NULL
);
13855 call_site_local
.pc
= pc
;
13856 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13859 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13860 "DIE %s [in module %s]"),
13861 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13862 objfile_name (objfile
));
13866 /* Count parameters at the caller. */
13869 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13870 child_die
= sibling_die (child_die
))
13872 if (child_die
->tag
!= DW_TAG_call_site_parameter
13873 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13875 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
13876 "DW_TAG_call_site child DIE %s [in module %s]"),
13877 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13878 objfile_name (objfile
));
13886 = ((struct call_site
*)
13887 obstack_alloc (&objfile
->objfile_obstack
,
13888 sizeof (*call_site
)
13889 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13891 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13892 call_site
->pc
= pc
;
13894 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13895 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13897 struct die_info
*func_die
;
13899 /* Skip also over DW_TAG_inlined_subroutine. */
13900 for (func_die
= die
->parent
;
13901 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13902 && func_die
->tag
!= DW_TAG_subroutine_type
;
13903 func_die
= func_die
->parent
);
13905 /* DW_AT_call_all_calls is a superset
13906 of DW_AT_call_all_tail_calls. */
13908 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13909 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13910 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13911 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13913 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13914 not complete. But keep CALL_SITE for look ups via call_site_htab,
13915 both the initial caller containing the real return address PC and
13916 the final callee containing the current PC of a chain of tail
13917 calls do not need to have the tail call list complete. But any
13918 function candidate for a virtual tail call frame searched via
13919 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13920 determined unambiguously. */
13924 struct type
*func_type
= NULL
;
13927 func_type
= get_die_type (func_die
, cu
);
13928 if (func_type
!= NULL
)
13930 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
13932 /* Enlist this call site to the function. */
13933 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13934 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13937 complaint (_("Cannot find function owning DW_TAG_call_site "
13938 "DIE %s [in module %s]"),
13939 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13943 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13945 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13947 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13950 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13951 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13953 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
13954 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
13955 /* Keep NULL DWARF_BLOCK. */;
13956 else if (attr_form_is_block (attr
))
13958 struct dwarf2_locexpr_baton
*dlbaton
;
13960 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13961 dlbaton
->data
= DW_BLOCK (attr
)->data
;
13962 dlbaton
->size
= DW_BLOCK (attr
)->size
;
13963 dlbaton
->per_cu
= cu
->per_cu
;
13965 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
13967 else if (attr_form_is_ref (attr
))
13969 struct dwarf2_cu
*target_cu
= cu
;
13970 struct die_info
*target_die
;
13972 target_die
= follow_die_ref (die
, attr
, &target_cu
);
13973 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
13974 if (die_is_declaration (target_die
, target_cu
))
13976 const char *target_physname
;
13978 /* Prefer the mangled name; otherwise compute the demangled one. */
13979 target_physname
= dw2_linkage_name (target_die
, target_cu
);
13980 if (target_physname
== NULL
)
13981 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
13982 if (target_physname
== NULL
)
13983 complaint (_("DW_AT_call_target target DIE has invalid "
13984 "physname, for referencing DIE %s [in module %s]"),
13985 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13987 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
13993 /* DW_AT_entry_pc should be preferred. */
13994 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
13995 <= PC_BOUNDS_INVALID
)
13996 complaint (_("DW_AT_call_target target DIE has invalid "
13997 "low pc, for referencing DIE %s [in module %s]"),
13998 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14001 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
14002 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
14007 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
14008 "block nor reference, for DIE %s [in module %s]"),
14009 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14011 call_site
->per_cu
= cu
->per_cu
;
14013 for (child_die
= die
->child
;
14014 child_die
&& child_die
->tag
;
14015 child_die
= sibling_die (child_die
))
14017 struct call_site_parameter
*parameter
;
14018 struct attribute
*loc
, *origin
;
14020 if (child_die
->tag
!= DW_TAG_call_site_parameter
14021 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14023 /* Already printed the complaint above. */
14027 gdb_assert (call_site
->parameter_count
< nparams
);
14028 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
14030 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
14031 specifies DW_TAG_formal_parameter. Value of the data assumed for the
14032 register is contained in DW_AT_call_value. */
14034 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
14035 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
14036 if (origin
== NULL
)
14038 /* This was a pre-DWARF-5 GNU extension alias
14039 for DW_AT_call_parameter. */
14040 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
14042 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
14044 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
14046 sect_offset sect_off
14047 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
14048 if (!offset_in_cu_p (&cu
->header
, sect_off
))
14050 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
14051 binding can be done only inside one CU. Such referenced DIE
14052 therefore cannot be even moved to DW_TAG_partial_unit. */
14053 complaint (_("DW_AT_call_parameter offset is not in CU for "
14054 "DW_TAG_call_site child DIE %s [in module %s]"),
14055 sect_offset_str (child_die
->sect_off
),
14056 objfile_name (objfile
));
14059 parameter
->u
.param_cu_off
14060 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
14062 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
14064 complaint (_("No DW_FORM_block* DW_AT_location for "
14065 "DW_TAG_call_site child DIE %s [in module %s]"),
14066 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
14071 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
14072 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
14073 if (parameter
->u
.dwarf_reg
!= -1)
14074 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
14075 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
14076 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
14077 ¶meter
->u
.fb_offset
))
14078 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
14081 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
14082 "for DW_FORM_block* DW_AT_location is supported for "
14083 "DW_TAG_call_site child DIE %s "
14085 sect_offset_str (child_die
->sect_off
),
14086 objfile_name (objfile
));
14091 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
14093 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
14094 if (!attr_form_is_block (attr
))
14096 complaint (_("No DW_FORM_block* DW_AT_call_value for "
14097 "DW_TAG_call_site child DIE %s [in module %s]"),
14098 sect_offset_str (child_die
->sect_off
),
14099 objfile_name (objfile
));
14102 parameter
->value
= DW_BLOCK (attr
)->data
;
14103 parameter
->value_size
= DW_BLOCK (attr
)->size
;
14105 /* Parameters are not pre-cleared by memset above. */
14106 parameter
->data_value
= NULL
;
14107 parameter
->data_value_size
= 0;
14108 call_site
->parameter_count
++;
14110 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
14112 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
14115 if (!attr_form_is_block (attr
))
14116 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
14117 "DW_TAG_call_site child DIE %s [in module %s]"),
14118 sect_offset_str (child_die
->sect_off
),
14119 objfile_name (objfile
));
14122 parameter
->data_value
= DW_BLOCK (attr
)->data
;
14123 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
14129 /* Helper function for read_variable. If DIE represents a virtual
14130 table, then return the type of the concrete object that is
14131 associated with the virtual table. Otherwise, return NULL. */
14133 static struct type
*
14134 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14136 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14140 /* Find the type DIE. */
14141 struct die_info
*type_die
= NULL
;
14142 struct dwarf2_cu
*type_cu
= cu
;
14144 if (attr_form_is_ref (attr
))
14145 type_die
= follow_die_ref (die
, attr
, &type_cu
);
14146 if (type_die
== NULL
)
14149 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
14151 return die_containing_type (type_die
, type_cu
);
14154 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
14157 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
14159 struct rust_vtable_symbol
*storage
= NULL
;
14161 if (cu
->language
== language_rust
)
14163 struct type
*containing_type
= rust_containing_type (die
, cu
);
14165 if (containing_type
!= NULL
)
14167 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14169 storage
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
14170 struct rust_vtable_symbol
);
14171 initialize_objfile_symbol (storage
);
14172 storage
->concrete_type
= containing_type
;
14173 storage
->subclass
= SYMBOL_RUST_VTABLE
;
14177 new_symbol (die
, NULL
, cu
, storage
);
14180 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
14181 reading .debug_rnglists.
14182 Callback's type should be:
14183 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14184 Return true if the attributes are present and valid, otherwise,
14187 template <typename Callback
>
14189 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
14190 Callback
&&callback
)
14192 struct dwarf2_per_objfile
*dwarf2_per_objfile
14193 = cu
->per_cu
->dwarf2_per_objfile
;
14194 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14195 bfd
*obfd
= objfile
->obfd
;
14196 /* Base address selection entry. */
14199 const gdb_byte
*buffer
;
14200 CORE_ADDR baseaddr
;
14201 bool overflow
= false;
14203 found_base
= cu
->base_known
;
14204 base
= cu
->base_address
;
14206 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
14207 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
14209 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14213 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
14215 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14219 /* Initialize it due to a false compiler warning. */
14220 CORE_ADDR range_beginning
= 0, range_end
= 0;
14221 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
14222 + dwarf2_per_objfile
->rnglists
.size
);
14223 unsigned int bytes_read
;
14225 if (buffer
== buf_end
)
14230 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
14233 case DW_RLE_end_of_list
:
14235 case DW_RLE_base_address
:
14236 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14241 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14243 buffer
+= bytes_read
;
14245 case DW_RLE_start_length
:
14246 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14251 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14252 buffer
+= bytes_read
;
14253 range_end
= (range_beginning
14254 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
14255 buffer
+= bytes_read
;
14256 if (buffer
> buf_end
)
14262 case DW_RLE_offset_pair
:
14263 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14264 buffer
+= bytes_read
;
14265 if (buffer
> buf_end
)
14270 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14271 buffer
+= bytes_read
;
14272 if (buffer
> buf_end
)
14278 case DW_RLE_start_end
:
14279 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
14284 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14285 buffer
+= bytes_read
;
14286 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14287 buffer
+= bytes_read
;
14290 complaint (_("Invalid .debug_rnglists data (no base address)"));
14293 if (rlet
== DW_RLE_end_of_list
|| overflow
)
14295 if (rlet
== DW_RLE_base_address
)
14300 /* We have no valid base address for the ranges
14302 complaint (_("Invalid .debug_rnglists data (no base address)"));
14306 if (range_beginning
> range_end
)
14308 /* Inverted range entries are invalid. */
14309 complaint (_("Invalid .debug_rnglists data (inverted range)"));
14313 /* Empty range entries have no effect. */
14314 if (range_beginning
== range_end
)
14317 range_beginning
+= base
;
14320 /* A not-uncommon case of bad debug info.
14321 Don't pollute the addrmap with bad data. */
14322 if (range_beginning
+ baseaddr
== 0
14323 && !dwarf2_per_objfile
->has_section_at_zero
)
14325 complaint (_(".debug_rnglists entry has start address of zero"
14326 " [in module %s]"), objfile_name (objfile
));
14330 callback (range_beginning
, range_end
);
14335 complaint (_("Offset %d is not terminated "
14336 "for DW_AT_ranges attribute"),
14344 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
14345 Callback's type should be:
14346 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14347 Return 1 if the attributes are present and valid, otherwise, return 0. */
14349 template <typename Callback
>
14351 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
14352 Callback
&&callback
)
14354 struct dwarf2_per_objfile
*dwarf2_per_objfile
14355 = cu
->per_cu
->dwarf2_per_objfile
;
14356 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14357 struct comp_unit_head
*cu_header
= &cu
->header
;
14358 bfd
*obfd
= objfile
->obfd
;
14359 unsigned int addr_size
= cu_header
->addr_size
;
14360 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14361 /* Base address selection entry. */
14364 unsigned int dummy
;
14365 const gdb_byte
*buffer
;
14366 CORE_ADDR baseaddr
;
14368 if (cu_header
->version
>= 5)
14369 return dwarf2_rnglists_process (offset
, cu
, callback
);
14371 found_base
= cu
->base_known
;
14372 base
= cu
->base_address
;
14374 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
14375 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
14377 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14381 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
14383 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14387 CORE_ADDR range_beginning
, range_end
;
14389 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
14390 buffer
+= addr_size
;
14391 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
14392 buffer
+= addr_size
;
14393 offset
+= 2 * addr_size
;
14395 /* An end of list marker is a pair of zero addresses. */
14396 if (range_beginning
== 0 && range_end
== 0)
14397 /* Found the end of list entry. */
14400 /* Each base address selection entry is a pair of 2 values.
14401 The first is the largest possible address, the second is
14402 the base address. Check for a base address here. */
14403 if ((range_beginning
& mask
) == mask
)
14405 /* If we found the largest possible address, then we already
14406 have the base address in range_end. */
14414 /* We have no valid base address for the ranges
14416 complaint (_("Invalid .debug_ranges data (no base address)"));
14420 if (range_beginning
> range_end
)
14422 /* Inverted range entries are invalid. */
14423 complaint (_("Invalid .debug_ranges data (inverted range)"));
14427 /* Empty range entries have no effect. */
14428 if (range_beginning
== range_end
)
14431 range_beginning
+= base
;
14434 /* A not-uncommon case of bad debug info.
14435 Don't pollute the addrmap with bad data. */
14436 if (range_beginning
+ baseaddr
== 0
14437 && !dwarf2_per_objfile
->has_section_at_zero
)
14439 complaint (_(".debug_ranges entry has start address of zero"
14440 " [in module %s]"), objfile_name (objfile
));
14444 callback (range_beginning
, range_end
);
14450 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
14451 Return 1 if the attributes are present and valid, otherwise, return 0.
14452 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
14455 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
14456 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
14457 struct partial_symtab
*ranges_pst
)
14459 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14460 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14461 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
14462 SECT_OFF_TEXT (objfile
));
14465 CORE_ADDR high
= 0;
14468 retval
= dwarf2_ranges_process (offset
, cu
,
14469 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
14471 if (ranges_pst
!= NULL
)
14476 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
14477 range_beginning
+ baseaddr
);
14478 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
14479 range_end
+ baseaddr
);
14480 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
14484 /* FIXME: This is recording everything as a low-high
14485 segment of consecutive addresses. We should have a
14486 data structure for discontiguous block ranges
14490 low
= range_beginning
;
14496 if (range_beginning
< low
)
14497 low
= range_beginning
;
14498 if (range_end
> high
)
14506 /* If the first entry is an end-of-list marker, the range
14507 describes an empty scope, i.e. no instructions. */
14513 *high_return
= high
;
14517 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14518 definition for the return value. *LOWPC and *HIGHPC are set iff
14519 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14521 static enum pc_bounds_kind
14522 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14523 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14524 struct partial_symtab
*pst
)
14526 struct dwarf2_per_objfile
*dwarf2_per_objfile
14527 = cu
->per_cu
->dwarf2_per_objfile
;
14528 struct attribute
*attr
;
14529 struct attribute
*attr_high
;
14531 CORE_ADDR high
= 0;
14532 enum pc_bounds_kind ret
;
14534 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14537 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14540 low
= attr_value_as_address (attr
);
14541 high
= attr_value_as_address (attr_high
);
14542 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14546 /* Found high w/o low attribute. */
14547 return PC_BOUNDS_INVALID
;
14549 /* Found consecutive range of addresses. */
14550 ret
= PC_BOUNDS_HIGH_LOW
;
14554 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14557 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14558 We take advantage of the fact that DW_AT_ranges does not appear
14559 in DW_TAG_compile_unit of DWO files. */
14560 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14561 unsigned int ranges_offset
= (DW_UNSND (attr
)
14562 + (need_ranges_base
14566 /* Value of the DW_AT_ranges attribute is the offset in the
14567 .debug_ranges section. */
14568 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
14569 return PC_BOUNDS_INVALID
;
14570 /* Found discontinuous range of addresses. */
14571 ret
= PC_BOUNDS_RANGES
;
14574 return PC_BOUNDS_NOT_PRESENT
;
14577 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14579 return PC_BOUNDS_INVALID
;
14581 /* When using the GNU linker, .gnu.linkonce. sections are used to
14582 eliminate duplicate copies of functions and vtables and such.
14583 The linker will arbitrarily choose one and discard the others.
14584 The AT_*_pc values for such functions refer to local labels in
14585 these sections. If the section from that file was discarded, the
14586 labels are not in the output, so the relocs get a value of 0.
14587 If this is a discarded function, mark the pc bounds as invalid,
14588 so that GDB will ignore it. */
14589 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14590 return PC_BOUNDS_INVALID
;
14598 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14599 its low and high PC addresses. Do nothing if these addresses could not
14600 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14601 and HIGHPC to the high address if greater than HIGHPC. */
14604 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14605 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14606 struct dwarf2_cu
*cu
)
14608 CORE_ADDR low
, high
;
14609 struct die_info
*child
= die
->child
;
14611 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14613 *lowpc
= std::min (*lowpc
, low
);
14614 *highpc
= std::max (*highpc
, high
);
14617 /* If the language does not allow nested subprograms (either inside
14618 subprograms or lexical blocks), we're done. */
14619 if (cu
->language
!= language_ada
)
14622 /* Check all the children of the given DIE. If it contains nested
14623 subprograms, then check their pc bounds. Likewise, we need to
14624 check lexical blocks as well, as they may also contain subprogram
14626 while (child
&& child
->tag
)
14628 if (child
->tag
== DW_TAG_subprogram
14629 || child
->tag
== DW_TAG_lexical_block
)
14630 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14631 child
= sibling_die (child
);
14635 /* Get the low and high pc's represented by the scope DIE, and store
14636 them in *LOWPC and *HIGHPC. If the correct values can't be
14637 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14640 get_scope_pc_bounds (struct die_info
*die
,
14641 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14642 struct dwarf2_cu
*cu
)
14644 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14645 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14646 CORE_ADDR current_low
, current_high
;
14648 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14649 >= PC_BOUNDS_RANGES
)
14651 best_low
= current_low
;
14652 best_high
= current_high
;
14656 struct die_info
*child
= die
->child
;
14658 while (child
&& child
->tag
)
14660 switch (child
->tag
) {
14661 case DW_TAG_subprogram
:
14662 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14664 case DW_TAG_namespace
:
14665 case DW_TAG_module
:
14666 /* FIXME: carlton/2004-01-16: Should we do this for
14667 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14668 that current GCC's always emit the DIEs corresponding
14669 to definitions of methods of classes as children of a
14670 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14671 the DIEs giving the declarations, which could be
14672 anywhere). But I don't see any reason why the
14673 standards says that they have to be there. */
14674 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14676 if (current_low
!= ((CORE_ADDR
) -1))
14678 best_low
= std::min (best_low
, current_low
);
14679 best_high
= std::max (best_high
, current_high
);
14687 child
= sibling_die (child
);
14692 *highpc
= best_high
;
14695 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14699 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14700 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14702 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14703 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14704 struct attribute
*attr
;
14705 struct attribute
*attr_high
;
14707 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14710 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14713 CORE_ADDR low
= attr_value_as_address (attr
);
14714 CORE_ADDR high
= attr_value_as_address (attr_high
);
14716 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14719 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14720 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14721 cu
->builder
->record_block_range (block
, low
, high
- 1);
14725 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14728 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14729 We take advantage of the fact that DW_AT_ranges does not appear
14730 in DW_TAG_compile_unit of DWO files. */
14731 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14733 /* The value of the DW_AT_ranges attribute is the offset of the
14734 address range list in the .debug_ranges section. */
14735 unsigned long offset
= (DW_UNSND (attr
)
14736 + (need_ranges_base
? cu
->ranges_base
: 0));
14738 dwarf2_ranges_process (offset
, cu
,
14739 [&] (CORE_ADDR start
, CORE_ADDR end
)
14743 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14744 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14745 cu
->builder
->record_block_range (block
, start
, end
- 1);
14750 /* Check whether the producer field indicates either of GCC < 4.6, or the
14751 Intel C/C++ compiler, and cache the result in CU. */
14754 check_producer (struct dwarf2_cu
*cu
)
14758 if (cu
->producer
== NULL
)
14760 /* For unknown compilers expect their behavior is DWARF version
14763 GCC started to support .debug_types sections by -gdwarf-4 since
14764 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14765 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14766 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14767 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14769 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14771 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14772 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14774 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14775 cu
->producer_is_icc_lt_14
= major
< 14;
14778 /* For other non-GCC compilers, expect their behavior is DWARF version
14782 cu
->checked_producer
= 1;
14785 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14786 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14787 during 4.6.0 experimental. */
14790 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14792 if (!cu
->checked_producer
)
14793 check_producer (cu
);
14795 return cu
->producer_is_gxx_lt_4_6
;
14798 /* Return the default accessibility type if it is not overriden by
14799 DW_AT_accessibility. */
14801 static enum dwarf_access_attribute
14802 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14804 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14806 /* The default DWARF 2 accessibility for members is public, the default
14807 accessibility for inheritance is private. */
14809 if (die
->tag
!= DW_TAG_inheritance
)
14810 return DW_ACCESS_public
;
14812 return DW_ACCESS_private
;
14816 /* DWARF 3+ defines the default accessibility a different way. The same
14817 rules apply now for DW_TAG_inheritance as for the members and it only
14818 depends on the container kind. */
14820 if (die
->parent
->tag
== DW_TAG_class_type
)
14821 return DW_ACCESS_private
;
14823 return DW_ACCESS_public
;
14827 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14828 offset. If the attribute was not found return 0, otherwise return
14829 1. If it was found but could not properly be handled, set *OFFSET
14833 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14836 struct attribute
*attr
;
14838 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14843 /* Note that we do not check for a section offset first here.
14844 This is because DW_AT_data_member_location is new in DWARF 4,
14845 so if we see it, we can assume that a constant form is really
14846 a constant and not a section offset. */
14847 if (attr_form_is_constant (attr
))
14848 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
14849 else if (attr_form_is_section_offset (attr
))
14850 dwarf2_complex_location_expr_complaint ();
14851 else if (attr_form_is_block (attr
))
14852 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14854 dwarf2_complex_location_expr_complaint ();
14862 /* Add an aggregate field to the field list. */
14865 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14866 struct dwarf2_cu
*cu
)
14868 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14869 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14870 struct nextfield
*new_field
;
14871 struct attribute
*attr
;
14873 const char *fieldname
= "";
14875 if (die
->tag
== DW_TAG_inheritance
)
14877 fip
->baseclasses
.emplace_back ();
14878 new_field
= &fip
->baseclasses
.back ();
14882 fip
->fields
.emplace_back ();
14883 new_field
= &fip
->fields
.back ();
14888 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14890 new_field
->accessibility
= DW_UNSND (attr
);
14892 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
14893 if (new_field
->accessibility
!= DW_ACCESS_public
)
14894 fip
->non_public_fields
= 1;
14896 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14898 new_field
->virtuality
= DW_UNSND (attr
);
14900 new_field
->virtuality
= DW_VIRTUALITY_none
;
14902 fp
= &new_field
->field
;
14904 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
14908 /* Data member other than a C++ static data member. */
14910 /* Get type of field. */
14911 fp
->type
= die_type (die
, cu
);
14913 SET_FIELD_BITPOS (*fp
, 0);
14915 /* Get bit size of field (zero if none). */
14916 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
14919 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
14923 FIELD_BITSIZE (*fp
) = 0;
14926 /* Get bit offset of field. */
14927 if (handle_data_member_location (die
, cu
, &offset
))
14928 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
14929 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
14932 if (gdbarch_bits_big_endian (gdbarch
))
14934 /* For big endian bits, the DW_AT_bit_offset gives the
14935 additional bit offset from the MSB of the containing
14936 anonymous object to the MSB of the field. We don't
14937 have to do anything special since we don't need to
14938 know the size of the anonymous object. */
14939 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
14943 /* For little endian bits, compute the bit offset to the
14944 MSB of the anonymous object, subtract off the number of
14945 bits from the MSB of the field to the MSB of the
14946 object, and then subtract off the number of bits of
14947 the field itself. The result is the bit offset of
14948 the LSB of the field. */
14949 int anonymous_size
;
14950 int bit_offset
= DW_UNSND (attr
);
14952 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14955 /* The size of the anonymous object containing
14956 the bit field is explicit, so use the
14957 indicated size (in bytes). */
14958 anonymous_size
= DW_UNSND (attr
);
14962 /* The size of the anonymous object containing
14963 the bit field must be inferred from the type
14964 attribute of the data member containing the
14966 anonymous_size
= TYPE_LENGTH (fp
->type
);
14968 SET_FIELD_BITPOS (*fp
,
14969 (FIELD_BITPOS (*fp
)
14970 + anonymous_size
* bits_per_byte
14971 - bit_offset
- FIELD_BITSIZE (*fp
)));
14974 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
14976 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
14977 + dwarf2_get_attr_constant_value (attr
, 0)));
14979 /* Get name of field. */
14980 fieldname
= dwarf2_name (die
, cu
);
14981 if (fieldname
== NULL
)
14984 /* The name is already allocated along with this objfile, so we don't
14985 need to duplicate it for the type. */
14986 fp
->name
= fieldname
;
14988 /* Change accessibility for artificial fields (e.g. virtual table
14989 pointer or virtual base class pointer) to private. */
14990 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
14992 FIELD_ARTIFICIAL (*fp
) = 1;
14993 new_field
->accessibility
= DW_ACCESS_private
;
14994 fip
->non_public_fields
= 1;
14997 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
14999 /* C++ static member. */
15001 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
15002 is a declaration, but all versions of G++ as of this writing
15003 (so through at least 3.2.1) incorrectly generate
15004 DW_TAG_variable tags. */
15006 const char *physname
;
15008 /* Get name of field. */
15009 fieldname
= dwarf2_name (die
, cu
);
15010 if (fieldname
== NULL
)
15013 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15015 /* Only create a symbol if this is an external value.
15016 new_symbol checks this and puts the value in the global symbol
15017 table, which we want. If it is not external, new_symbol
15018 will try to put the value in cu->list_in_scope which is wrong. */
15019 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
15021 /* A static const member, not much different than an enum as far as
15022 we're concerned, except that we can support more types. */
15023 new_symbol (die
, NULL
, cu
);
15026 /* Get physical name. */
15027 physname
= dwarf2_physname (fieldname
, die
, cu
);
15029 /* The name is already allocated along with this objfile, so we don't
15030 need to duplicate it for the type. */
15031 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
15032 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15033 FIELD_NAME (*fp
) = fieldname
;
15035 else if (die
->tag
== DW_TAG_inheritance
)
15039 /* C++ base class field. */
15040 if (handle_data_member_location (die
, cu
, &offset
))
15041 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15042 FIELD_BITSIZE (*fp
) = 0;
15043 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15044 FIELD_NAME (*fp
) = TYPE_NAME (fp
->type
);
15046 else if (die
->tag
== DW_TAG_variant_part
)
15048 /* process_structure_scope will treat this DIE as a union. */
15049 process_structure_scope (die
, cu
);
15051 /* The variant part is relative to the start of the enclosing
15053 SET_FIELD_BITPOS (*fp
, 0);
15054 fp
->type
= get_die_type (die
, cu
);
15055 fp
->artificial
= 1;
15056 fp
->name
= "<<variant>>";
15059 gdb_assert_not_reached ("missing case in dwarf2_add_field");
15062 /* Can the type given by DIE define another type? */
15065 type_can_define_types (const struct die_info
*die
)
15069 case DW_TAG_typedef
:
15070 case DW_TAG_class_type
:
15071 case DW_TAG_structure_type
:
15072 case DW_TAG_union_type
:
15073 case DW_TAG_enumeration_type
:
15081 /* Add a type definition defined in the scope of the FIP's class. */
15084 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
15085 struct dwarf2_cu
*cu
)
15087 struct decl_field fp
;
15088 memset (&fp
, 0, sizeof (fp
));
15090 gdb_assert (type_can_define_types (die
));
15092 /* Get name of field. NULL is okay here, meaning an anonymous type. */
15093 fp
.name
= dwarf2_name (die
, cu
);
15094 fp
.type
= read_type_die (die
, cu
);
15096 /* Save accessibility. */
15097 enum dwarf_access_attribute accessibility
;
15098 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15100 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15102 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15103 switch (accessibility
)
15105 case DW_ACCESS_public
:
15106 /* The assumed value if neither private nor protected. */
15108 case DW_ACCESS_private
:
15111 case DW_ACCESS_protected
:
15112 fp
.is_protected
= 1;
15115 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
15118 if (die
->tag
== DW_TAG_typedef
)
15119 fip
->typedef_field_list
.push_back (fp
);
15121 fip
->nested_types_list
.push_back (fp
);
15124 /* Create the vector of fields, and attach it to the type. */
15127 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
15128 struct dwarf2_cu
*cu
)
15130 int nfields
= fip
->nfields
;
15132 /* Record the field count, allocate space for the array of fields,
15133 and create blank accessibility bitfields if necessary. */
15134 TYPE_NFIELDS (type
) = nfields
;
15135 TYPE_FIELDS (type
) = (struct field
*)
15136 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
15138 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
15140 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15142 TYPE_FIELD_PRIVATE_BITS (type
) =
15143 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15144 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
15146 TYPE_FIELD_PROTECTED_BITS (type
) =
15147 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15148 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
15150 TYPE_FIELD_IGNORE_BITS (type
) =
15151 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15152 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
15155 /* If the type has baseclasses, allocate and clear a bit vector for
15156 TYPE_FIELD_VIRTUAL_BITS. */
15157 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
15159 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
15160 unsigned char *pointer
;
15162 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15163 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
15164 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
15165 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
15166 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
15169 if (TYPE_FLAG_DISCRIMINATED_UNION (type
))
15171 struct discriminant_info
*di
= alloc_discriminant_info (type
, -1, -1);
15173 for (int index
= 0; index
< nfields
; ++index
)
15175 struct nextfield
&field
= fip
->fields
[index
];
15177 if (field
.variant
.is_discriminant
)
15178 di
->discriminant_index
= index
;
15179 else if (field
.variant
.default_branch
)
15180 di
->default_index
= index
;
15182 di
->discriminants
[index
] = field
.variant
.discriminant_value
;
15186 /* Copy the saved-up fields into the field vector. */
15187 for (int i
= 0; i
< nfields
; ++i
)
15189 struct nextfield
&field
15190 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
15191 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
15193 TYPE_FIELD (type
, i
) = field
.field
;
15194 switch (field
.accessibility
)
15196 case DW_ACCESS_private
:
15197 if (cu
->language
!= language_ada
)
15198 SET_TYPE_FIELD_PRIVATE (type
, i
);
15201 case DW_ACCESS_protected
:
15202 if (cu
->language
!= language_ada
)
15203 SET_TYPE_FIELD_PROTECTED (type
, i
);
15206 case DW_ACCESS_public
:
15210 /* Unknown accessibility. Complain and treat it as public. */
15212 complaint (_("unsupported accessibility %d"),
15213 field
.accessibility
);
15217 if (i
< fip
->baseclasses
.size ())
15219 switch (field
.virtuality
)
15221 case DW_VIRTUALITY_virtual
:
15222 case DW_VIRTUALITY_pure_virtual
:
15223 if (cu
->language
== language_ada
)
15224 error (_("unexpected virtuality in component of Ada type"));
15225 SET_TYPE_FIELD_VIRTUAL (type
, i
);
15232 /* Return true if this member function is a constructor, false
15236 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
15238 const char *fieldname
;
15239 const char *type_name
;
15242 if (die
->parent
== NULL
)
15245 if (die
->parent
->tag
!= DW_TAG_structure_type
15246 && die
->parent
->tag
!= DW_TAG_union_type
15247 && die
->parent
->tag
!= DW_TAG_class_type
)
15250 fieldname
= dwarf2_name (die
, cu
);
15251 type_name
= dwarf2_name (die
->parent
, cu
);
15252 if (fieldname
== NULL
|| type_name
== NULL
)
15255 len
= strlen (fieldname
);
15256 return (strncmp (fieldname
, type_name
, len
) == 0
15257 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
15260 /* Add a member function to the proper fieldlist. */
15263 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15264 struct type
*type
, struct dwarf2_cu
*cu
)
15266 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15267 struct attribute
*attr
;
15269 struct fnfieldlist
*flp
= nullptr;
15270 struct fn_field
*fnp
;
15271 const char *fieldname
;
15272 struct type
*this_type
;
15273 enum dwarf_access_attribute accessibility
;
15275 if (cu
->language
== language_ada
)
15276 error (_("unexpected member function in Ada type"));
15278 /* Get name of member function. */
15279 fieldname
= dwarf2_name (die
, cu
);
15280 if (fieldname
== NULL
)
15283 /* Look up member function name in fieldlist. */
15284 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15286 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15288 flp
= &fip
->fnfieldlists
[i
];
15293 /* Create a new fnfieldlist if necessary. */
15294 if (flp
== nullptr)
15296 fip
->fnfieldlists
.emplace_back ();
15297 flp
= &fip
->fnfieldlists
.back ();
15298 flp
->name
= fieldname
;
15299 i
= fip
->fnfieldlists
.size () - 1;
15302 /* Create a new member function field and add it to the vector of
15304 flp
->fnfields
.emplace_back ();
15305 fnp
= &flp
->fnfields
.back ();
15307 /* Delay processing of the physname until later. */
15308 if (cu
->language
== language_cplus
)
15309 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15313 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15314 fnp
->physname
= physname
? physname
: "";
15317 fnp
->type
= alloc_type (objfile
);
15318 this_type
= read_type_die (die
, cu
);
15319 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
15321 int nparams
= TYPE_NFIELDS (this_type
);
15323 /* TYPE is the domain of this method, and THIS_TYPE is the type
15324 of the method itself (TYPE_CODE_METHOD). */
15325 smash_to_method_type (fnp
->type
, type
,
15326 TYPE_TARGET_TYPE (this_type
),
15327 TYPE_FIELDS (this_type
),
15328 TYPE_NFIELDS (this_type
),
15329 TYPE_VARARGS (this_type
));
15331 /* Handle static member functions.
15332 Dwarf2 has no clean way to discern C++ static and non-static
15333 member functions. G++ helps GDB by marking the first
15334 parameter for non-static member functions (which is the this
15335 pointer) as artificial. We obtain this information from
15336 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15337 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15338 fnp
->voffset
= VOFFSET_STATIC
;
15341 complaint (_("member function type missing for '%s'"),
15342 dwarf2_full_name (fieldname
, die
, cu
));
15344 /* Get fcontext from DW_AT_containing_type if present. */
15345 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15346 fnp
->fcontext
= die_containing_type (die
, cu
);
15348 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15349 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15351 /* Get accessibility. */
15352 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15354 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15356 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15357 switch (accessibility
)
15359 case DW_ACCESS_private
:
15360 fnp
->is_private
= 1;
15362 case DW_ACCESS_protected
:
15363 fnp
->is_protected
= 1;
15367 /* Check for artificial methods. */
15368 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15369 if (attr
&& DW_UNSND (attr
) != 0)
15370 fnp
->is_artificial
= 1;
15372 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15374 /* Get index in virtual function table if it is a virtual member
15375 function. For older versions of GCC, this is an offset in the
15376 appropriate virtual table, as specified by DW_AT_containing_type.
15377 For everyone else, it is an expression to be evaluated relative
15378 to the object address. */
15380 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15383 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
15385 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15387 /* Old-style GCC. */
15388 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15390 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15391 || (DW_BLOCK (attr
)->size
> 1
15392 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15393 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15395 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15396 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15397 dwarf2_complex_location_expr_complaint ();
15399 fnp
->voffset
/= cu
->header
.addr_size
;
15403 dwarf2_complex_location_expr_complaint ();
15405 if (!fnp
->fcontext
)
15407 /* If there is no `this' field and no DW_AT_containing_type,
15408 we cannot actually find a base class context for the
15410 if (TYPE_NFIELDS (this_type
) == 0
15411 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15413 complaint (_("cannot determine context for virtual member "
15414 "function \"%s\" (offset %s)"),
15415 fieldname
, sect_offset_str (die
->sect_off
));
15420 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15424 else if (attr_form_is_section_offset (attr
))
15426 dwarf2_complex_location_expr_complaint ();
15430 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15436 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15437 if (attr
&& DW_UNSND (attr
))
15439 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15440 complaint (_("Member function \"%s\" (offset %s) is virtual "
15441 "but the vtable offset is not specified"),
15442 fieldname
, sect_offset_str (die
->sect_off
));
15443 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15444 TYPE_CPLUS_DYNAMIC (type
) = 1;
15449 /* Create the vector of member function fields, and attach it to the type. */
15452 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15453 struct dwarf2_cu
*cu
)
15455 if (cu
->language
== language_ada
)
15456 error (_("unexpected member functions in Ada type"));
15458 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15459 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15461 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15463 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15465 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15466 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15468 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15469 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15470 fn_flp
->fn_fields
= (struct fn_field
*)
15471 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15473 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15474 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15477 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15480 /* Returns non-zero if NAME is the name of a vtable member in CU's
15481 language, zero otherwise. */
15483 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15485 static const char vptr
[] = "_vptr";
15487 /* Look for the C++ form of the vtable. */
15488 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15494 /* GCC outputs unnamed structures that are really pointers to member
15495 functions, with the ABI-specified layout. If TYPE describes
15496 such a structure, smash it into a member function type.
15498 GCC shouldn't do this; it should just output pointer to member DIEs.
15499 This is GCC PR debug/28767. */
15502 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15504 struct type
*pfn_type
, *self_type
, *new_type
;
15506 /* Check for a structure with no name and two children. */
15507 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15510 /* Check for __pfn and __delta members. */
15511 if (TYPE_FIELD_NAME (type
, 0) == NULL
15512 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15513 || TYPE_FIELD_NAME (type
, 1) == NULL
15514 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15517 /* Find the type of the method. */
15518 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15519 if (pfn_type
== NULL
15520 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15521 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15524 /* Look for the "this" argument. */
15525 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15526 if (TYPE_NFIELDS (pfn_type
) == 0
15527 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15528 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15531 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15532 new_type
= alloc_type (objfile
);
15533 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15534 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15535 TYPE_VARARGS (pfn_type
));
15536 smash_to_methodptr_type (type
, new_type
);
15539 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15540 appropriate error checking and issuing complaints if there is a
15544 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15546 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15548 if (attr
== nullptr)
15551 if (!attr_form_is_constant (attr
))
15553 complaint (_("DW_AT_alignment must have constant form"
15554 " - DIE at %s [in module %s]"),
15555 sect_offset_str (die
->sect_off
),
15556 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15561 if (attr
->form
== DW_FORM_sdata
)
15563 LONGEST val
= DW_SND (attr
);
15566 complaint (_("DW_AT_alignment value must not be negative"
15567 " - DIE at %s [in module %s]"),
15568 sect_offset_str (die
->sect_off
),
15569 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15575 align
= DW_UNSND (attr
);
15579 complaint (_("DW_AT_alignment value must not be zero"
15580 " - DIE at %s [in module %s]"),
15581 sect_offset_str (die
->sect_off
),
15582 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15585 if ((align
& (align
- 1)) != 0)
15587 complaint (_("DW_AT_alignment value must be a power of 2"
15588 " - DIE at %s [in module %s]"),
15589 sect_offset_str (die
->sect_off
),
15590 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15597 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15598 the alignment for TYPE. */
15601 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15604 if (!set_type_align (type
, get_alignment (cu
, die
)))
15605 complaint (_("DW_AT_alignment value too large"
15606 " - DIE at %s [in module %s]"),
15607 sect_offset_str (die
->sect_off
),
15608 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15611 /* Called when we find the DIE that starts a structure or union scope
15612 (definition) to create a type for the structure or union. Fill in
15613 the type's name and general properties; the members will not be
15614 processed until process_structure_scope. A symbol table entry for
15615 the type will also not be done until process_structure_scope (assuming
15616 the type has a name).
15618 NOTE: we need to call these functions regardless of whether or not the
15619 DIE has a DW_AT_name attribute, since it might be an anonymous
15620 structure or union. This gets the type entered into our set of
15621 user defined types. */
15623 static struct type
*
15624 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15626 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15628 struct attribute
*attr
;
15631 /* If the definition of this type lives in .debug_types, read that type.
15632 Don't follow DW_AT_specification though, that will take us back up
15633 the chain and we want to go down. */
15634 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
15637 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15639 /* The type's CU may not be the same as CU.
15640 Ensure TYPE is recorded with CU in die_type_hash. */
15641 return set_die_type (die
, type
, cu
);
15644 type
= alloc_type (objfile
);
15645 INIT_CPLUS_SPECIFIC (type
);
15647 name
= dwarf2_name (die
, cu
);
15650 if (cu
->language
== language_cplus
15651 || cu
->language
== language_d
15652 || cu
->language
== language_rust
)
15654 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15656 /* dwarf2_full_name might have already finished building the DIE's
15657 type. If so, there is no need to continue. */
15658 if (get_die_type (die
, cu
) != NULL
)
15659 return get_die_type (die
, cu
);
15661 TYPE_NAME (type
) = full_name
;
15665 /* The name is already allocated along with this objfile, so
15666 we don't need to duplicate it for the type. */
15667 TYPE_NAME (type
) = name
;
15671 if (die
->tag
== DW_TAG_structure_type
)
15673 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15675 else if (die
->tag
== DW_TAG_union_type
)
15677 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15679 else if (die
->tag
== DW_TAG_variant_part
)
15681 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15682 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
15686 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15689 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15690 TYPE_DECLARED_CLASS (type
) = 1;
15692 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15695 if (attr_form_is_constant (attr
))
15696 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15699 /* For the moment, dynamic type sizes are not supported
15700 by GDB's struct type. The actual size is determined
15701 on-demand when resolving the type of a given object,
15702 so set the type's length to zero for now. Otherwise,
15703 we record an expression as the length, and that expression
15704 could lead to a very large value, which could eventually
15705 lead to us trying to allocate that much memory when creating
15706 a value of that type. */
15707 TYPE_LENGTH (type
) = 0;
15712 TYPE_LENGTH (type
) = 0;
15715 maybe_set_alignment (cu
, die
, type
);
15717 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15719 /* ICC<14 does not output the required DW_AT_declaration on
15720 incomplete types, but gives them a size of zero. */
15721 TYPE_STUB (type
) = 1;
15724 TYPE_STUB_SUPPORTED (type
) = 1;
15726 if (die_is_declaration (die
, cu
))
15727 TYPE_STUB (type
) = 1;
15728 else if (attr
== NULL
&& die
->child
== NULL
15729 && producer_is_realview (cu
->producer
))
15730 /* RealView does not output the required DW_AT_declaration
15731 on incomplete types. */
15732 TYPE_STUB (type
) = 1;
15734 /* We need to add the type field to the die immediately so we don't
15735 infinitely recurse when dealing with pointers to the structure
15736 type within the structure itself. */
15737 set_die_type (die
, type
, cu
);
15739 /* set_die_type should be already done. */
15740 set_descriptive_type (type
, die
, cu
);
15745 /* A helper for process_structure_scope that handles a single member
15749 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15750 struct field_info
*fi
,
15751 std::vector
<struct symbol
*> *template_args
,
15752 struct dwarf2_cu
*cu
)
15754 if (child_die
->tag
== DW_TAG_member
15755 || child_die
->tag
== DW_TAG_variable
15756 || child_die
->tag
== DW_TAG_variant_part
)
15758 /* NOTE: carlton/2002-11-05: A C++ static data member
15759 should be a DW_TAG_member that is a declaration, but
15760 all versions of G++ as of this writing (so through at
15761 least 3.2.1) incorrectly generate DW_TAG_variable
15762 tags for them instead. */
15763 dwarf2_add_field (fi
, child_die
, cu
);
15765 else if (child_die
->tag
== DW_TAG_subprogram
)
15767 /* Rust doesn't have member functions in the C++ sense.
15768 However, it does emit ordinary functions as children
15769 of a struct DIE. */
15770 if (cu
->language
== language_rust
)
15771 read_func_scope (child_die
, cu
);
15774 /* C++ member function. */
15775 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15778 else if (child_die
->tag
== DW_TAG_inheritance
)
15780 /* C++ base class field. */
15781 dwarf2_add_field (fi
, child_die
, cu
);
15783 else if (type_can_define_types (child_die
))
15784 dwarf2_add_type_defn (fi
, child_die
, cu
);
15785 else if (child_die
->tag
== DW_TAG_template_type_param
15786 || child_die
->tag
== DW_TAG_template_value_param
)
15788 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15791 template_args
->push_back (arg
);
15793 else if (child_die
->tag
== DW_TAG_variant
)
15795 /* In a variant we want to get the discriminant and also add a
15796 field for our sole member child. */
15797 struct attribute
*discr
= dwarf2_attr (child_die
, DW_AT_discr_value
, cu
);
15799 for (struct die_info
*variant_child
= child_die
->child
;
15800 variant_child
!= NULL
;
15801 variant_child
= sibling_die (variant_child
))
15803 if (variant_child
->tag
== DW_TAG_member
)
15805 handle_struct_member_die (variant_child
, type
, fi
,
15806 template_args
, cu
);
15807 /* Only handle the one. */
15812 /* We don't handle this but we might as well report it if we see
15814 if (dwarf2_attr (child_die
, DW_AT_discr_list
, cu
) != nullptr)
15815 complaint (_("DW_AT_discr_list is not supported yet"
15816 " - DIE at %s [in module %s]"),
15817 sect_offset_str (child_die
->sect_off
),
15818 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15820 /* The first field was just added, so we can stash the
15821 discriminant there. */
15822 gdb_assert (!fi
->fields
.empty ());
15824 fi
->fields
.back ().variant
.default_branch
= true;
15826 fi
->fields
.back ().variant
.discriminant_value
= DW_UNSND (discr
);
15830 /* Finish creating a structure or union type, including filling in
15831 its members and creating a symbol for it. */
15834 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15836 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15837 struct die_info
*child_die
;
15840 type
= get_die_type (die
, cu
);
15842 type
= read_structure_type (die
, cu
);
15844 /* When reading a DW_TAG_variant_part, we need to notice when we
15845 read the discriminant member, so we can record it later in the
15846 discriminant_info. */
15847 bool is_variant_part
= TYPE_FLAG_DISCRIMINATED_UNION (type
);
15848 sect_offset discr_offset
;
15850 if (is_variant_part
)
15852 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15855 /* Maybe it's a univariant form, an extension we support.
15856 In this case arrange not to check the offset. */
15857 is_variant_part
= false;
15859 else if (attr_form_is_ref (discr
))
15861 struct dwarf2_cu
*target_cu
= cu
;
15862 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15864 discr_offset
= target_die
->sect_off
;
15868 complaint (_("DW_AT_discr does not have DIE reference form"
15869 " - DIE at %s [in module %s]"),
15870 sect_offset_str (die
->sect_off
),
15871 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15872 is_variant_part
= false;
15876 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15878 struct field_info fi
;
15879 std::vector
<struct symbol
*> template_args
;
15881 child_die
= die
->child
;
15883 while (child_die
&& child_die
->tag
)
15885 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15887 if (is_variant_part
&& discr_offset
== child_die
->sect_off
)
15888 fi
.fields
.back ().variant
.is_discriminant
= true;
15890 child_die
= sibling_die (child_die
);
15893 /* Attach template arguments to type. */
15894 if (!template_args
.empty ())
15896 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15897 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15898 TYPE_TEMPLATE_ARGUMENTS (type
)
15899 = XOBNEWVEC (&objfile
->objfile_obstack
,
15901 TYPE_N_TEMPLATE_ARGUMENTS (type
));
15902 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
15903 template_args
.data (),
15904 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
15905 * sizeof (struct symbol
*)));
15908 /* Attach fields and member functions to the type. */
15910 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
15911 if (!fi
.fnfieldlists
.empty ())
15913 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
15915 /* Get the type which refers to the base class (possibly this
15916 class itself) which contains the vtable pointer for the current
15917 class from the DW_AT_containing_type attribute. This use of
15918 DW_AT_containing_type is a GNU extension. */
15920 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15922 struct type
*t
= die_containing_type (die
, cu
);
15924 set_type_vptr_basetype (type
, t
);
15929 /* Our own class provides vtbl ptr. */
15930 for (i
= TYPE_NFIELDS (t
) - 1;
15931 i
>= TYPE_N_BASECLASSES (t
);
15934 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
15936 if (is_vtable_name (fieldname
, cu
))
15938 set_type_vptr_fieldno (type
, i
);
15943 /* Complain if virtual function table field not found. */
15944 if (i
< TYPE_N_BASECLASSES (t
))
15945 complaint (_("virtual function table pointer "
15946 "not found when defining class '%s'"),
15947 TYPE_NAME (type
) ? TYPE_NAME (type
) : "");
15951 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
15954 else if (cu
->producer
15955 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
15957 /* The IBM XLC compiler does not provide direct indication
15958 of the containing type, but the vtable pointer is
15959 always named __vfp. */
15963 for (i
= TYPE_NFIELDS (type
) - 1;
15964 i
>= TYPE_N_BASECLASSES (type
);
15967 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
15969 set_type_vptr_fieldno (type
, i
);
15970 set_type_vptr_basetype (type
, type
);
15977 /* Copy fi.typedef_field_list linked list elements content into the
15978 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
15979 if (!fi
.typedef_field_list
.empty ())
15981 int count
= fi
.typedef_field_list
.size ();
15983 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15984 TYPE_TYPEDEF_FIELD_ARRAY (type
)
15985 = ((struct decl_field
*)
15987 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
15988 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
15990 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
15991 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
15994 /* Copy fi.nested_types_list linked list elements content into the
15995 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
15996 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
15998 int count
= fi
.nested_types_list
.size ();
16000 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16001 TYPE_NESTED_TYPES_ARRAY (type
)
16002 = ((struct decl_field
*)
16003 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
16004 TYPE_NESTED_TYPES_COUNT (type
) = count
;
16006 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
16007 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
16011 quirk_gcc_member_function_pointer (type
, objfile
);
16012 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
16013 cu
->rust_unions
.push_back (type
);
16015 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
16016 snapshots) has been known to create a die giving a declaration
16017 for a class that has, as a child, a die giving a definition for a
16018 nested class. So we have to process our children even if the
16019 current die is a declaration. Normally, of course, a declaration
16020 won't have any children at all. */
16022 child_die
= die
->child
;
16024 while (child_die
!= NULL
&& child_die
->tag
)
16026 if (child_die
->tag
== DW_TAG_member
16027 || child_die
->tag
== DW_TAG_variable
16028 || child_die
->tag
== DW_TAG_inheritance
16029 || child_die
->tag
== DW_TAG_template_value_param
16030 || child_die
->tag
== DW_TAG_template_type_param
)
16035 process_die (child_die
, cu
);
16037 child_die
= sibling_die (child_die
);
16040 /* Do not consider external references. According to the DWARF standard,
16041 these DIEs are identified by the fact that they have no byte_size
16042 attribute, and a declaration attribute. */
16043 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
16044 || !die_is_declaration (die
, cu
))
16045 new_symbol (die
, type
, cu
);
16048 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
16049 update TYPE using some information only available in DIE's children. */
16052 update_enumeration_type_from_children (struct die_info
*die
,
16054 struct dwarf2_cu
*cu
)
16056 struct die_info
*child_die
;
16057 int unsigned_enum
= 1;
16061 auto_obstack obstack
;
16063 for (child_die
= die
->child
;
16064 child_die
!= NULL
&& child_die
->tag
;
16065 child_die
= sibling_die (child_die
))
16067 struct attribute
*attr
;
16069 const gdb_byte
*bytes
;
16070 struct dwarf2_locexpr_baton
*baton
;
16073 if (child_die
->tag
!= DW_TAG_enumerator
)
16076 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
16080 name
= dwarf2_name (child_die
, cu
);
16082 name
= "<anonymous enumerator>";
16084 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
16085 &value
, &bytes
, &baton
);
16091 else if ((mask
& value
) != 0)
16096 /* If we already know that the enum type is neither unsigned, nor
16097 a flag type, no need to look at the rest of the enumerates. */
16098 if (!unsigned_enum
&& !flag_enum
)
16103 TYPE_UNSIGNED (type
) = 1;
16105 TYPE_FLAG_ENUM (type
) = 1;
16108 /* Given a DW_AT_enumeration_type die, set its type. We do not
16109 complete the type's fields yet, or create any symbols. */
16111 static struct type
*
16112 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16114 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16116 struct attribute
*attr
;
16119 /* If the definition of this type lives in .debug_types, read that type.
16120 Don't follow DW_AT_specification though, that will take us back up
16121 the chain and we want to go down. */
16122 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
16125 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16127 /* The type's CU may not be the same as CU.
16128 Ensure TYPE is recorded with CU in die_type_hash. */
16129 return set_die_type (die
, type
, cu
);
16132 type
= alloc_type (objfile
);
16134 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
16135 name
= dwarf2_full_name (NULL
, die
, cu
);
16137 TYPE_NAME (type
) = name
;
16139 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16142 struct type
*underlying_type
= die_type (die
, cu
);
16144 TYPE_TARGET_TYPE (type
) = underlying_type
;
16147 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16150 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16154 TYPE_LENGTH (type
) = 0;
16157 maybe_set_alignment (cu
, die
, type
);
16159 /* The enumeration DIE can be incomplete. In Ada, any type can be
16160 declared as private in the package spec, and then defined only
16161 inside the package body. Such types are known as Taft Amendment
16162 Types. When another package uses such a type, an incomplete DIE
16163 may be generated by the compiler. */
16164 if (die_is_declaration (die
, cu
))
16165 TYPE_STUB (type
) = 1;
16167 /* Finish the creation of this type by using the enum's children.
16168 We must call this even when the underlying type has been provided
16169 so that we can determine if we're looking at a "flag" enum. */
16170 update_enumeration_type_from_children (die
, type
, cu
);
16172 /* If this type has an underlying type that is not a stub, then we
16173 may use its attributes. We always use the "unsigned" attribute
16174 in this situation, because ordinarily we guess whether the type
16175 is unsigned -- but the guess can be wrong and the underlying type
16176 can tell us the reality. However, we defer to a local size
16177 attribute if one exists, because this lets the compiler override
16178 the underlying type if needed. */
16179 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16181 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
16182 if (TYPE_LENGTH (type
) == 0)
16183 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
16184 if (TYPE_RAW_ALIGN (type
) == 0
16185 && TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)) != 0)
16186 set_type_align (type
, TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)));
16189 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16191 return set_die_type (die
, type
, cu
);
16194 /* Given a pointer to a die which begins an enumeration, process all
16195 the dies that define the members of the enumeration, and create the
16196 symbol for the enumeration type.
16198 NOTE: We reverse the order of the element list. */
16201 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16203 struct type
*this_type
;
16205 this_type
= get_die_type (die
, cu
);
16206 if (this_type
== NULL
)
16207 this_type
= read_enumeration_type (die
, cu
);
16209 if (die
->child
!= NULL
)
16211 struct die_info
*child_die
;
16212 struct symbol
*sym
;
16213 struct field
*fields
= NULL
;
16214 int num_fields
= 0;
16217 child_die
= die
->child
;
16218 while (child_die
&& child_die
->tag
)
16220 if (child_die
->tag
!= DW_TAG_enumerator
)
16222 process_die (child_die
, cu
);
16226 name
= dwarf2_name (child_die
, cu
);
16229 sym
= new_symbol (child_die
, this_type
, cu
);
16231 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
16233 fields
= (struct field
*)
16235 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
16236 * sizeof (struct field
));
16239 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
16240 FIELD_TYPE (fields
[num_fields
]) = NULL
;
16241 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
16242 FIELD_BITSIZE (fields
[num_fields
]) = 0;
16248 child_die
= sibling_die (child_die
);
16253 TYPE_NFIELDS (this_type
) = num_fields
;
16254 TYPE_FIELDS (this_type
) = (struct field
*)
16255 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
16256 memcpy (TYPE_FIELDS (this_type
), fields
,
16257 sizeof (struct field
) * num_fields
);
16262 /* If we are reading an enum from a .debug_types unit, and the enum
16263 is a declaration, and the enum is not the signatured type in the
16264 unit, then we do not want to add a symbol for it. Adding a
16265 symbol would in some cases obscure the true definition of the
16266 enum, giving users an incomplete type when the definition is
16267 actually available. Note that we do not want to do this for all
16268 enums which are just declarations, because C++0x allows forward
16269 enum declarations. */
16270 if (cu
->per_cu
->is_debug_types
16271 && die_is_declaration (die
, cu
))
16273 struct signatured_type
*sig_type
;
16275 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16276 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16277 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16281 new_symbol (die
, this_type
, cu
);
16284 /* Extract all information from a DW_TAG_array_type DIE and put it in
16285 the DIE's type field. For now, this only handles one dimensional
16288 static struct type
*
16289 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16291 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16292 struct die_info
*child_die
;
16294 struct type
*element_type
, *range_type
, *index_type
;
16295 struct attribute
*attr
;
16297 struct dynamic_prop
*byte_stride_prop
= NULL
;
16298 unsigned int bit_stride
= 0;
16300 element_type
= die_type (die
, cu
);
16302 /* The die_type call above may have already set the type for this DIE. */
16303 type
= get_die_type (die
, cu
);
16307 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16313 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16314 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
);
16317 complaint (_("unable to read array DW_AT_byte_stride "
16318 " - DIE at %s [in module %s]"),
16319 sect_offset_str (die
->sect_off
),
16320 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16321 /* Ignore this attribute. We will likely not be able to print
16322 arrays of this type correctly, but there is little we can do
16323 to help if we cannot read the attribute's value. */
16324 byte_stride_prop
= NULL
;
16328 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16330 bit_stride
= DW_UNSND (attr
);
16332 /* Irix 6.2 native cc creates array types without children for
16333 arrays with unspecified length. */
16334 if (die
->child
== NULL
)
16336 index_type
= objfile_type (objfile
)->builtin_int
;
16337 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16338 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16339 byte_stride_prop
, bit_stride
);
16340 return set_die_type (die
, type
, cu
);
16343 std::vector
<struct type
*> range_types
;
16344 child_die
= die
->child
;
16345 while (child_die
&& child_die
->tag
)
16347 if (child_die
->tag
== DW_TAG_subrange_type
)
16349 struct type
*child_type
= read_type_die (child_die
, cu
);
16351 if (child_type
!= NULL
)
16353 /* The range type was succesfully read. Save it for the
16354 array type creation. */
16355 range_types
.push_back (child_type
);
16358 child_die
= sibling_die (child_die
);
16361 /* Dwarf2 dimensions are output from left to right, create the
16362 necessary array types in backwards order. */
16364 type
= element_type
;
16366 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16370 while (i
< range_types
.size ())
16371 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16372 byte_stride_prop
, bit_stride
);
16376 size_t ndim
= range_types
.size ();
16378 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16379 byte_stride_prop
, bit_stride
);
16382 /* Understand Dwarf2 support for vector types (like they occur on
16383 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16384 array type. This is not part of the Dwarf2/3 standard yet, but a
16385 custom vendor extension. The main difference between a regular
16386 array and the vector variant is that vectors are passed by value
16388 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16390 make_vector_type (type
);
16392 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16393 implementation may choose to implement triple vectors using this
16395 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16398 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16399 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16401 complaint (_("DW_AT_byte_size for array type smaller "
16402 "than the total size of elements"));
16405 name
= dwarf2_name (die
, cu
);
16407 TYPE_NAME (type
) = name
;
16409 maybe_set_alignment (cu
, die
, type
);
16411 /* Install the type in the die. */
16412 set_die_type (die
, type
, cu
);
16414 /* set_die_type should be already done. */
16415 set_descriptive_type (type
, die
, cu
);
16420 static enum dwarf_array_dim_ordering
16421 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16423 struct attribute
*attr
;
16425 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16428 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16430 /* GNU F77 is a special case, as at 08/2004 array type info is the
16431 opposite order to the dwarf2 specification, but data is still
16432 laid out as per normal fortran.
16434 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16435 version checking. */
16437 if (cu
->language
== language_fortran
16438 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16440 return DW_ORD_row_major
;
16443 switch (cu
->language_defn
->la_array_ordering
)
16445 case array_column_major
:
16446 return DW_ORD_col_major
;
16447 case array_row_major
:
16449 return DW_ORD_row_major
;
16453 /* Extract all information from a DW_TAG_set_type DIE and put it in
16454 the DIE's type field. */
16456 static struct type
*
16457 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16459 struct type
*domain_type
, *set_type
;
16460 struct attribute
*attr
;
16462 domain_type
= die_type (die
, cu
);
16464 /* The die_type call above may have already set the type for this DIE. */
16465 set_type
= get_die_type (die
, cu
);
16469 set_type
= create_set_type (NULL
, domain_type
);
16471 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16473 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16475 maybe_set_alignment (cu
, die
, set_type
);
16477 return set_die_type (die
, set_type
, cu
);
16480 /* A helper for read_common_block that creates a locexpr baton.
16481 SYM is the symbol which we are marking as computed.
16482 COMMON_DIE is the DIE for the common block.
16483 COMMON_LOC is the location expression attribute for the common
16485 MEMBER_LOC is the location expression attribute for the particular
16486 member of the common block that we are processing.
16487 CU is the CU from which the above come. */
16490 mark_common_block_symbol_computed (struct symbol
*sym
,
16491 struct die_info
*common_die
,
16492 struct attribute
*common_loc
,
16493 struct attribute
*member_loc
,
16494 struct dwarf2_cu
*cu
)
16496 struct dwarf2_per_objfile
*dwarf2_per_objfile
16497 = cu
->per_cu
->dwarf2_per_objfile
;
16498 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16499 struct dwarf2_locexpr_baton
*baton
;
16501 unsigned int cu_off
;
16502 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
16503 LONGEST offset
= 0;
16505 gdb_assert (common_loc
&& member_loc
);
16506 gdb_assert (attr_form_is_block (common_loc
));
16507 gdb_assert (attr_form_is_block (member_loc
)
16508 || attr_form_is_constant (member_loc
));
16510 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16511 baton
->per_cu
= cu
->per_cu
;
16512 gdb_assert (baton
->per_cu
);
16514 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16516 if (attr_form_is_constant (member_loc
))
16518 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
16519 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16522 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16524 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16527 *ptr
++ = DW_OP_call4
;
16528 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16529 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16532 if (attr_form_is_constant (member_loc
))
16534 *ptr
++ = DW_OP_addr
;
16535 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16536 ptr
+= cu
->header
.addr_size
;
16540 /* We have to copy the data here, because DW_OP_call4 will only
16541 use a DW_AT_location attribute. */
16542 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16543 ptr
+= DW_BLOCK (member_loc
)->size
;
16546 *ptr
++ = DW_OP_plus
;
16547 gdb_assert (ptr
- baton
->data
== baton
->size
);
16549 SYMBOL_LOCATION_BATON (sym
) = baton
;
16550 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16553 /* Create appropriate locally-scoped variables for all the
16554 DW_TAG_common_block entries. Also create a struct common_block
16555 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16556 is used to sepate the common blocks name namespace from regular
16560 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16562 struct attribute
*attr
;
16564 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16567 /* Support the .debug_loc offsets. */
16568 if (attr_form_is_block (attr
))
16572 else if (attr_form_is_section_offset (attr
))
16574 dwarf2_complex_location_expr_complaint ();
16579 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16580 "common block member");
16585 if (die
->child
!= NULL
)
16587 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16588 struct die_info
*child_die
;
16589 size_t n_entries
= 0, size
;
16590 struct common_block
*common_block
;
16591 struct symbol
*sym
;
16593 for (child_die
= die
->child
;
16594 child_die
&& child_die
->tag
;
16595 child_die
= sibling_die (child_die
))
16598 size
= (sizeof (struct common_block
)
16599 + (n_entries
- 1) * sizeof (struct symbol
*));
16601 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16603 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16604 common_block
->n_entries
= 0;
16606 for (child_die
= die
->child
;
16607 child_die
&& child_die
->tag
;
16608 child_die
= sibling_die (child_die
))
16610 /* Create the symbol in the DW_TAG_common_block block in the current
16612 sym
= new_symbol (child_die
, NULL
, cu
);
16615 struct attribute
*member_loc
;
16617 common_block
->contents
[common_block
->n_entries
++] = sym
;
16619 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16623 /* GDB has handled this for a long time, but it is
16624 not specified by DWARF. It seems to have been
16625 emitted by gfortran at least as recently as:
16626 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16627 complaint (_("Variable in common block has "
16628 "DW_AT_data_member_location "
16629 "- DIE at %s [in module %s]"),
16630 sect_offset_str (child_die
->sect_off
),
16631 objfile_name (objfile
));
16633 if (attr_form_is_section_offset (member_loc
))
16634 dwarf2_complex_location_expr_complaint ();
16635 else if (attr_form_is_constant (member_loc
)
16636 || attr_form_is_block (member_loc
))
16639 mark_common_block_symbol_computed (sym
, die
, attr
,
16643 dwarf2_complex_location_expr_complaint ();
16648 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16649 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16653 /* Create a type for a C++ namespace. */
16655 static struct type
*
16656 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16658 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16659 const char *previous_prefix
, *name
;
16663 /* For extensions, reuse the type of the original namespace. */
16664 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16666 struct die_info
*ext_die
;
16667 struct dwarf2_cu
*ext_cu
= cu
;
16669 ext_die
= dwarf2_extension (die
, &ext_cu
);
16670 type
= read_type_die (ext_die
, ext_cu
);
16672 /* EXT_CU may not be the same as CU.
16673 Ensure TYPE is recorded with CU in die_type_hash. */
16674 return set_die_type (die
, type
, cu
);
16677 name
= namespace_name (die
, &is_anonymous
, cu
);
16679 /* Now build the name of the current namespace. */
16681 previous_prefix
= determine_prefix (die
, cu
);
16682 if (previous_prefix
[0] != '\0')
16683 name
= typename_concat (&objfile
->objfile_obstack
,
16684 previous_prefix
, name
, 0, cu
);
16686 /* Create the type. */
16687 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16689 return set_die_type (die
, type
, cu
);
16692 /* Read a namespace scope. */
16695 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16697 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16700 /* Add a symbol associated to this if we haven't seen the namespace
16701 before. Also, add a using directive if it's an anonymous
16704 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16708 type
= read_type_die (die
, cu
);
16709 new_symbol (die
, type
, cu
);
16711 namespace_name (die
, &is_anonymous
, cu
);
16714 const char *previous_prefix
= determine_prefix (die
, cu
);
16716 std::vector
<const char *> excludes
;
16717 add_using_directive (using_directives (cu
),
16718 previous_prefix
, TYPE_NAME (type
), NULL
,
16719 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16723 if (die
->child
!= NULL
)
16725 struct die_info
*child_die
= die
->child
;
16727 while (child_die
&& child_die
->tag
)
16729 process_die (child_die
, cu
);
16730 child_die
= sibling_die (child_die
);
16735 /* Read a Fortran module as type. This DIE can be only a declaration used for
16736 imported module. Still we need that type as local Fortran "use ... only"
16737 declaration imports depend on the created type in determine_prefix. */
16739 static struct type
*
16740 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16742 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16743 const char *module_name
;
16746 module_name
= dwarf2_name (die
, cu
);
16748 complaint (_("DW_TAG_module has no name, offset %s"),
16749 sect_offset_str (die
->sect_off
));
16750 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16752 return set_die_type (die
, type
, cu
);
16755 /* Read a Fortran module. */
16758 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16760 struct die_info
*child_die
= die
->child
;
16763 type
= read_type_die (die
, cu
);
16764 new_symbol (die
, type
, cu
);
16766 while (child_die
&& child_die
->tag
)
16768 process_die (child_die
, cu
);
16769 child_die
= sibling_die (child_die
);
16773 /* Return the name of the namespace represented by DIE. Set
16774 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16777 static const char *
16778 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16780 struct die_info
*current_die
;
16781 const char *name
= NULL
;
16783 /* Loop through the extensions until we find a name. */
16785 for (current_die
= die
;
16786 current_die
!= NULL
;
16787 current_die
= dwarf2_extension (die
, &cu
))
16789 /* We don't use dwarf2_name here so that we can detect the absence
16790 of a name -> anonymous namespace. */
16791 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16797 /* Is it an anonymous namespace? */
16799 *is_anonymous
= (name
== NULL
);
16801 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16806 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16807 the user defined type vector. */
16809 static struct type
*
16810 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16812 struct gdbarch
*gdbarch
16813 = get_objfile_arch (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16814 struct comp_unit_head
*cu_header
= &cu
->header
;
16816 struct attribute
*attr_byte_size
;
16817 struct attribute
*attr_address_class
;
16818 int byte_size
, addr_class
;
16819 struct type
*target_type
;
16821 target_type
= die_type (die
, cu
);
16823 /* The die_type call above may have already set the type for this DIE. */
16824 type
= get_die_type (die
, cu
);
16828 type
= lookup_pointer_type (target_type
);
16830 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16831 if (attr_byte_size
)
16832 byte_size
= DW_UNSND (attr_byte_size
);
16834 byte_size
= cu_header
->addr_size
;
16836 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16837 if (attr_address_class
)
16838 addr_class
= DW_UNSND (attr_address_class
);
16840 addr_class
= DW_ADDR_none
;
16842 ULONGEST alignment
= get_alignment (cu
, die
);
16844 /* If the pointer size, alignment, or address class is different
16845 than the default, create a type variant marked as such and set
16846 the length accordingly. */
16847 if (TYPE_LENGTH (type
) != byte_size
16848 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
16849 && alignment
!= TYPE_RAW_ALIGN (type
))
16850 || addr_class
!= DW_ADDR_none
)
16852 if (gdbarch_address_class_type_flags_p (gdbarch
))
16856 type_flags
= gdbarch_address_class_type_flags
16857 (gdbarch
, byte_size
, addr_class
);
16858 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16860 type
= make_type_with_address_space (type
, type_flags
);
16862 else if (TYPE_LENGTH (type
) != byte_size
)
16864 complaint (_("invalid pointer size %d"), byte_size
);
16866 else if (TYPE_RAW_ALIGN (type
) != alignment
)
16868 complaint (_("Invalid DW_AT_alignment"
16869 " - DIE at %s [in module %s]"),
16870 sect_offset_str (die
->sect_off
),
16871 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16875 /* Should we also complain about unhandled address classes? */
16879 TYPE_LENGTH (type
) = byte_size
;
16880 set_type_align (type
, alignment
);
16881 return set_die_type (die
, type
, cu
);
16884 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16885 the user defined type vector. */
16887 static struct type
*
16888 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16891 struct type
*to_type
;
16892 struct type
*domain
;
16894 to_type
= die_type (die
, cu
);
16895 domain
= die_containing_type (die
, cu
);
16897 /* The calls above may have already set the type for this DIE. */
16898 type
= get_die_type (die
, cu
);
16902 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
16903 type
= lookup_methodptr_type (to_type
);
16904 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
16906 struct type
*new_type
16907 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16909 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
16910 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
16911 TYPE_VARARGS (to_type
));
16912 type
= lookup_methodptr_type (new_type
);
16915 type
= lookup_memberptr_type (to_type
, domain
);
16917 return set_die_type (die
, type
, cu
);
16920 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
16921 the user defined type vector. */
16923 static struct type
*
16924 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16925 enum type_code refcode
)
16927 struct comp_unit_head
*cu_header
= &cu
->header
;
16928 struct type
*type
, *target_type
;
16929 struct attribute
*attr
;
16931 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
16933 target_type
= die_type (die
, cu
);
16935 /* The die_type call above may have already set the type for this DIE. */
16936 type
= get_die_type (die
, cu
);
16940 type
= lookup_reference_type (target_type
, refcode
);
16941 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16944 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16948 TYPE_LENGTH (type
) = cu_header
->addr_size
;
16950 maybe_set_alignment (cu
, die
, type
);
16951 return set_die_type (die
, type
, cu
);
16954 /* Add the given cv-qualifiers to the element type of the array. GCC
16955 outputs DWARF type qualifiers that apply to an array, not the
16956 element type. But GDB relies on the array element type to carry
16957 the cv-qualifiers. This mimics section 6.7.3 of the C99
16960 static struct type
*
16961 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16962 struct type
*base_type
, int cnst
, int voltl
)
16964 struct type
*el_type
, *inner_array
;
16966 base_type
= copy_type (base_type
);
16967 inner_array
= base_type
;
16969 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
16971 TYPE_TARGET_TYPE (inner_array
) =
16972 copy_type (TYPE_TARGET_TYPE (inner_array
));
16973 inner_array
= TYPE_TARGET_TYPE (inner_array
);
16976 el_type
= TYPE_TARGET_TYPE (inner_array
);
16977 cnst
|= TYPE_CONST (el_type
);
16978 voltl
|= TYPE_VOLATILE (el_type
);
16979 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
16981 return set_die_type (die
, base_type
, cu
);
16984 static struct type
*
16985 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16987 struct type
*base_type
, *cv_type
;
16989 base_type
= die_type (die
, cu
);
16991 /* The die_type call above may have already set the type for this DIE. */
16992 cv_type
= get_die_type (die
, cu
);
16996 /* In case the const qualifier is applied to an array type, the element type
16997 is so qualified, not the array type (section 6.7.3 of C99). */
16998 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
16999 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
17001 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
17002 return set_die_type (die
, cv_type
, cu
);
17005 static struct type
*
17006 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17008 struct type
*base_type
, *cv_type
;
17010 base_type
= die_type (die
, cu
);
17012 /* The die_type call above may have already set the type for this DIE. */
17013 cv_type
= get_die_type (die
, cu
);
17017 /* In case the volatile qualifier is applied to an array type, the
17018 element type is so qualified, not the array type (section 6.7.3
17020 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17021 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
17023 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
17024 return set_die_type (die
, cv_type
, cu
);
17027 /* Handle DW_TAG_restrict_type. */
17029 static struct type
*
17030 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17032 struct type
*base_type
, *cv_type
;
17034 base_type
= die_type (die
, cu
);
17036 /* The die_type call above may have already set the type for this DIE. */
17037 cv_type
= get_die_type (die
, cu
);
17041 cv_type
= make_restrict_type (base_type
);
17042 return set_die_type (die
, cv_type
, cu
);
17045 /* Handle DW_TAG_atomic_type. */
17047 static struct type
*
17048 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17050 struct type
*base_type
, *cv_type
;
17052 base_type
= die_type (die
, cu
);
17054 /* The die_type call above may have already set the type for this DIE. */
17055 cv_type
= get_die_type (die
, cu
);
17059 cv_type
= make_atomic_type (base_type
);
17060 return set_die_type (die
, cv_type
, cu
);
17063 /* Extract all information from a DW_TAG_string_type DIE and add to
17064 the user defined type vector. It isn't really a user defined type,
17065 but it behaves like one, with other DIE's using an AT_user_def_type
17066 attribute to reference it. */
17068 static struct type
*
17069 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17071 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17072 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17073 struct type
*type
, *range_type
, *index_type
, *char_type
;
17074 struct attribute
*attr
;
17075 unsigned int length
;
17077 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
17080 length
= DW_UNSND (attr
);
17084 /* Check for the DW_AT_byte_size attribute. */
17085 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17088 length
= DW_UNSND (attr
);
17096 index_type
= objfile_type (objfile
)->builtin_int
;
17097 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17098 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
17099 type
= create_string_type (NULL
, char_type
, range_type
);
17101 return set_die_type (die
, type
, cu
);
17104 /* Assuming that DIE corresponds to a function, returns nonzero
17105 if the function is prototyped. */
17108 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
17110 struct attribute
*attr
;
17112 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
17113 if (attr
&& (DW_UNSND (attr
) != 0))
17116 /* The DWARF standard implies that the DW_AT_prototyped attribute
17117 is only meaninful for C, but the concept also extends to other
17118 languages that allow unprototyped functions (Eg: Objective C).
17119 For all other languages, assume that functions are always
17121 if (cu
->language
!= language_c
17122 && cu
->language
!= language_objc
17123 && cu
->language
!= language_opencl
)
17126 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17127 prototyped and unprototyped functions; default to prototyped,
17128 since that is more common in modern code (and RealView warns
17129 about unprototyped functions). */
17130 if (producer_is_realview (cu
->producer
))
17136 /* Handle DIES due to C code like:
17140 int (*funcp)(int a, long l);
17144 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17146 static struct type
*
17147 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17149 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17150 struct type
*type
; /* Type that this function returns. */
17151 struct type
*ftype
; /* Function that returns above type. */
17152 struct attribute
*attr
;
17154 type
= die_type (die
, cu
);
17156 /* The die_type call above may have already set the type for this DIE. */
17157 ftype
= get_die_type (die
, cu
);
17161 ftype
= lookup_function_type (type
);
17163 if (prototyped_function_p (die
, cu
))
17164 TYPE_PROTOTYPED (ftype
) = 1;
17166 /* Store the calling convention in the type if it's available in
17167 the subroutine die. Otherwise set the calling convention to
17168 the default value DW_CC_normal. */
17169 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17171 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
17172 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17173 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17175 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17177 /* Record whether the function returns normally to its caller or not
17178 if the DWARF producer set that information. */
17179 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17180 if (attr
&& (DW_UNSND (attr
) != 0))
17181 TYPE_NO_RETURN (ftype
) = 1;
17183 /* We need to add the subroutine type to the die immediately so
17184 we don't infinitely recurse when dealing with parameters
17185 declared as the same subroutine type. */
17186 set_die_type (die
, ftype
, cu
);
17188 if (die
->child
!= NULL
)
17190 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17191 struct die_info
*child_die
;
17192 int nparams
, iparams
;
17194 /* Count the number of parameters.
17195 FIXME: GDB currently ignores vararg functions, but knows about
17196 vararg member functions. */
17198 child_die
= die
->child
;
17199 while (child_die
&& child_die
->tag
)
17201 if (child_die
->tag
== DW_TAG_formal_parameter
)
17203 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17204 TYPE_VARARGS (ftype
) = 1;
17205 child_die
= sibling_die (child_die
);
17208 /* Allocate storage for parameters and fill them in. */
17209 TYPE_NFIELDS (ftype
) = nparams
;
17210 TYPE_FIELDS (ftype
) = (struct field
*)
17211 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
17213 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17214 even if we error out during the parameters reading below. */
17215 for (iparams
= 0; iparams
< nparams
; iparams
++)
17216 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17219 child_die
= die
->child
;
17220 while (child_die
&& child_die
->tag
)
17222 if (child_die
->tag
== DW_TAG_formal_parameter
)
17224 struct type
*arg_type
;
17226 /* DWARF version 2 has no clean way to discern C++
17227 static and non-static member functions. G++ helps
17228 GDB by marking the first parameter for non-static
17229 member functions (which is the this pointer) as
17230 artificial. We pass this information to
17231 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17233 DWARF version 3 added DW_AT_object_pointer, which GCC
17234 4.5 does not yet generate. */
17235 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17237 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17239 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17240 arg_type
= die_type (child_die
, cu
);
17242 /* RealView does not mark THIS as const, which the testsuite
17243 expects. GCC marks THIS as const in method definitions,
17244 but not in the class specifications (GCC PR 43053). */
17245 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17246 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17249 struct dwarf2_cu
*arg_cu
= cu
;
17250 const char *name
= dwarf2_name (child_die
, cu
);
17252 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17255 /* If the compiler emits this, use it. */
17256 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17259 else if (name
&& strcmp (name
, "this") == 0)
17260 /* Function definitions will have the argument names. */
17262 else if (name
== NULL
&& iparams
== 0)
17263 /* Declarations may not have the names, so like
17264 elsewhere in GDB, assume an artificial first
17265 argument is "this". */
17269 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17273 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17276 child_die
= sibling_die (child_die
);
17283 static struct type
*
17284 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17286 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17287 const char *name
= NULL
;
17288 struct type
*this_type
, *target_type
;
17290 name
= dwarf2_full_name (NULL
, die
, cu
);
17291 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17292 TYPE_TARGET_STUB (this_type
) = 1;
17293 set_die_type (die
, this_type
, cu
);
17294 target_type
= die_type (die
, cu
);
17295 if (target_type
!= this_type
)
17296 TYPE_TARGET_TYPE (this_type
) = target_type
;
17299 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17300 spec and cause infinite loops in GDB. */
17301 complaint (_("Self-referential DW_TAG_typedef "
17302 "- DIE at %s [in module %s]"),
17303 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17304 TYPE_TARGET_TYPE (this_type
) = NULL
;
17309 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17310 (which may be different from NAME) to the architecture back-end to allow
17311 it to guess the correct format if necessary. */
17313 static struct type
*
17314 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17315 const char *name_hint
)
17317 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17318 const struct floatformat
**format
;
17321 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17323 type
= init_float_type (objfile
, bits
, name
, format
);
17325 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17330 /* Find a representation of a given base type and install
17331 it in the TYPE field of the die. */
17333 static struct type
*
17334 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17336 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17338 struct attribute
*attr
;
17339 int encoding
= 0, bits
= 0;
17342 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17345 encoding
= DW_UNSND (attr
);
17347 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17350 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17352 name
= dwarf2_name (die
, cu
);
17355 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
17360 case DW_ATE_address
:
17361 /* Turn DW_ATE_address into a void * pointer. */
17362 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17363 type
= init_pointer_type (objfile
, bits
, name
, type
);
17365 case DW_ATE_boolean
:
17366 type
= init_boolean_type (objfile
, bits
, 1, name
);
17368 case DW_ATE_complex_float
:
17369 type
= dwarf2_init_float_type (objfile
, bits
/ 2, NULL
, name
);
17370 type
= init_complex_type (objfile
, name
, type
);
17372 case DW_ATE_decimal_float
:
17373 type
= init_decfloat_type (objfile
, bits
, name
);
17376 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
17378 case DW_ATE_signed
:
17379 type
= init_integer_type (objfile
, bits
, 0, name
);
17381 case DW_ATE_unsigned
:
17382 if (cu
->language
== language_fortran
17384 && startswith (name
, "character("))
17385 type
= init_character_type (objfile
, bits
, 1, name
);
17387 type
= init_integer_type (objfile
, bits
, 1, name
);
17389 case DW_ATE_signed_char
:
17390 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17391 || cu
->language
== language_pascal
17392 || cu
->language
== language_fortran
)
17393 type
= init_character_type (objfile
, bits
, 0, name
);
17395 type
= init_integer_type (objfile
, bits
, 0, name
);
17397 case DW_ATE_unsigned_char
:
17398 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17399 || cu
->language
== language_pascal
17400 || cu
->language
== language_fortran
17401 || cu
->language
== language_rust
)
17402 type
= init_character_type (objfile
, bits
, 1, name
);
17404 type
= init_integer_type (objfile
, bits
, 1, name
);
17408 gdbarch
*arch
= get_objfile_arch (objfile
);
17411 type
= builtin_type (arch
)->builtin_char16
;
17412 else if (bits
== 32)
17413 type
= builtin_type (arch
)->builtin_char32
;
17416 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
17418 type
= init_integer_type (objfile
, bits
, 1, name
);
17420 return set_die_type (die
, type
, cu
);
17425 complaint (_("unsupported DW_AT_encoding: '%s'"),
17426 dwarf_type_encoding_name (encoding
));
17427 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17431 if (name
&& strcmp (name
, "char") == 0)
17432 TYPE_NOSIGN (type
) = 1;
17434 maybe_set_alignment (cu
, die
, type
);
17436 return set_die_type (die
, type
, cu
);
17439 /* Parse dwarf attribute if it's a block, reference or constant and put the
17440 resulting value of the attribute into struct bound_prop.
17441 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17444 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17445 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
17447 struct dwarf2_property_baton
*baton
;
17448 struct obstack
*obstack
17449 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17451 if (attr
== NULL
|| prop
== NULL
)
17454 if (attr_form_is_block (attr
))
17456 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17457 baton
->referenced_type
= NULL
;
17458 baton
->locexpr
.per_cu
= cu
->per_cu
;
17459 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17460 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17461 prop
->data
.baton
= baton
;
17462 prop
->kind
= PROP_LOCEXPR
;
17463 gdb_assert (prop
->data
.baton
!= NULL
);
17465 else if (attr_form_is_ref (attr
))
17467 struct dwarf2_cu
*target_cu
= cu
;
17468 struct die_info
*target_die
;
17469 struct attribute
*target_attr
;
17471 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17472 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17473 if (target_attr
== NULL
)
17474 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17476 if (target_attr
== NULL
)
17479 switch (target_attr
->name
)
17481 case DW_AT_location
:
17482 if (attr_form_is_section_offset (target_attr
))
17484 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17485 baton
->referenced_type
= die_type (target_die
, target_cu
);
17486 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17487 prop
->data
.baton
= baton
;
17488 prop
->kind
= PROP_LOCLIST
;
17489 gdb_assert (prop
->data
.baton
!= NULL
);
17491 else if (attr_form_is_block (target_attr
))
17493 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17494 baton
->referenced_type
= die_type (target_die
, target_cu
);
17495 baton
->locexpr
.per_cu
= cu
->per_cu
;
17496 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17497 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17498 prop
->data
.baton
= baton
;
17499 prop
->kind
= PROP_LOCEXPR
;
17500 gdb_assert (prop
->data
.baton
!= NULL
);
17504 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17505 "dynamic property");
17509 case DW_AT_data_member_location
:
17513 if (!handle_data_member_location (target_die
, target_cu
,
17517 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17518 baton
->referenced_type
= read_type_die (target_die
->parent
,
17520 baton
->offset_info
.offset
= offset
;
17521 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17522 prop
->data
.baton
= baton
;
17523 prop
->kind
= PROP_ADDR_OFFSET
;
17528 else if (attr_form_is_constant (attr
))
17530 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
17531 prop
->kind
= PROP_CONST
;
17535 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17536 dwarf2_name (die
, cu
));
17543 /* Read the given DW_AT_subrange DIE. */
17545 static struct type
*
17546 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17548 struct type
*base_type
, *orig_base_type
;
17549 struct type
*range_type
;
17550 struct attribute
*attr
;
17551 struct dynamic_prop low
, high
;
17552 int low_default_is_valid
;
17553 int high_bound_is_count
= 0;
17555 LONGEST negative_mask
;
17557 orig_base_type
= die_type (die
, cu
);
17558 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17559 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17560 creating the range type, but we use the result of check_typedef
17561 when examining properties of the type. */
17562 base_type
= check_typedef (orig_base_type
);
17564 /* The die_type call above may have already set the type for this DIE. */
17565 range_type
= get_die_type (die
, cu
);
17569 low
.kind
= PROP_CONST
;
17570 high
.kind
= PROP_CONST
;
17571 high
.data
.const_val
= 0;
17573 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17574 omitting DW_AT_lower_bound. */
17575 switch (cu
->language
)
17578 case language_cplus
:
17579 low
.data
.const_val
= 0;
17580 low_default_is_valid
= 1;
17582 case language_fortran
:
17583 low
.data
.const_val
= 1;
17584 low_default_is_valid
= 1;
17587 case language_objc
:
17588 case language_rust
:
17589 low
.data
.const_val
= 0;
17590 low_default_is_valid
= (cu
->header
.version
>= 4);
17594 case language_pascal
:
17595 low
.data
.const_val
= 1;
17596 low_default_is_valid
= (cu
->header
.version
>= 4);
17599 low
.data
.const_val
= 0;
17600 low_default_is_valid
= 0;
17604 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17606 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
17607 else if (!low_default_is_valid
)
17608 complaint (_("Missing DW_AT_lower_bound "
17609 "- DIE at %s [in module %s]"),
17610 sect_offset_str (die
->sect_off
),
17611 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17613 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17614 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17616 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
17617 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17619 /* If bounds are constant do the final calculation here. */
17620 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17621 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17623 high_bound_is_count
= 1;
17627 /* Dwarf-2 specifications explicitly allows to create subrange types
17628 without specifying a base type.
17629 In that case, the base type must be set to the type of
17630 the lower bound, upper bound or count, in that order, if any of these
17631 three attributes references an object that has a type.
17632 If no base type is found, the Dwarf-2 specifications say that
17633 a signed integer type of size equal to the size of an address should
17635 For the following C code: `extern char gdb_int [];'
17636 GCC produces an empty range DIE.
17637 FIXME: muller/2010-05-28: Possible references to object for low bound,
17638 high bound or count are not yet handled by this code. */
17639 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
17641 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17642 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17643 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
17644 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
17646 /* Test "int", "long int", and "long long int" objfile types,
17647 and select the first one having a size above or equal to the
17648 architecture address size. */
17649 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17650 base_type
= int_type
;
17653 int_type
= objfile_type (objfile
)->builtin_long
;
17654 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17655 base_type
= int_type
;
17658 int_type
= objfile_type (objfile
)->builtin_long_long
;
17659 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17660 base_type
= int_type
;
17665 /* Normally, the DWARF producers are expected to use a signed
17666 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17667 But this is unfortunately not always the case, as witnessed
17668 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17669 is used instead. To work around that ambiguity, we treat
17670 the bounds as signed, and thus sign-extend their values, when
17671 the base type is signed. */
17673 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17674 if (low
.kind
== PROP_CONST
17675 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17676 low
.data
.const_val
|= negative_mask
;
17677 if (high
.kind
== PROP_CONST
17678 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17679 high
.data
.const_val
|= negative_mask
;
17681 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
17683 if (high_bound_is_count
)
17684 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17686 /* Ada expects an empty array on no boundary attributes. */
17687 if (attr
== NULL
&& cu
->language
!= language_ada
)
17688 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17690 name
= dwarf2_name (die
, cu
);
17692 TYPE_NAME (range_type
) = name
;
17694 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17696 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17698 maybe_set_alignment (cu
, die
, range_type
);
17700 set_die_type (die
, range_type
, cu
);
17702 /* set_die_type should be already done. */
17703 set_descriptive_type (range_type
, die
, cu
);
17708 static struct type
*
17709 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17713 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
17715 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
17717 /* In Ada, an unspecified type is typically used when the description
17718 of the type is defered to a different unit. When encountering
17719 such a type, we treat it as a stub, and try to resolve it later on,
17721 if (cu
->language
== language_ada
)
17722 TYPE_STUB (type
) = 1;
17724 return set_die_type (die
, type
, cu
);
17727 /* Read a single die and all its descendents. Set the die's sibling
17728 field to NULL; set other fields in the die correctly, and set all
17729 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17730 location of the info_ptr after reading all of those dies. PARENT
17731 is the parent of the die in question. */
17733 static struct die_info
*
17734 read_die_and_children (const struct die_reader_specs
*reader
,
17735 const gdb_byte
*info_ptr
,
17736 const gdb_byte
**new_info_ptr
,
17737 struct die_info
*parent
)
17739 struct die_info
*die
;
17740 const gdb_byte
*cur_ptr
;
17743 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
17746 *new_info_ptr
= cur_ptr
;
17749 store_in_ref_table (die
, reader
->cu
);
17752 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17756 *new_info_ptr
= cur_ptr
;
17759 die
->sibling
= NULL
;
17760 die
->parent
= parent
;
17764 /* Read a die, all of its descendents, and all of its siblings; set
17765 all of the fields of all of the dies correctly. Arguments are as
17766 in read_die_and_children. */
17768 static struct die_info
*
17769 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17770 const gdb_byte
*info_ptr
,
17771 const gdb_byte
**new_info_ptr
,
17772 struct die_info
*parent
)
17774 struct die_info
*first_die
, *last_sibling
;
17775 const gdb_byte
*cur_ptr
;
17777 cur_ptr
= info_ptr
;
17778 first_die
= last_sibling
= NULL
;
17782 struct die_info
*die
17783 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17787 *new_info_ptr
= cur_ptr
;
17794 last_sibling
->sibling
= die
;
17796 last_sibling
= die
;
17800 /* Read a die, all of its descendents, and all of its siblings; set
17801 all of the fields of all of the dies correctly. Arguments are as
17802 in read_die_and_children.
17803 This the main entry point for reading a DIE and all its children. */
17805 static struct die_info
*
17806 read_die_and_siblings (const struct die_reader_specs
*reader
,
17807 const gdb_byte
*info_ptr
,
17808 const gdb_byte
**new_info_ptr
,
17809 struct die_info
*parent
)
17811 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17812 new_info_ptr
, parent
);
17814 if (dwarf_die_debug
)
17816 fprintf_unfiltered (gdb_stdlog
,
17817 "Read die from %s@0x%x of %s:\n",
17818 get_section_name (reader
->die_section
),
17819 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17820 bfd_get_filename (reader
->abfd
));
17821 dump_die (die
, dwarf_die_debug
);
17827 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
17829 The caller is responsible for filling in the extra attributes
17830 and updating (*DIEP)->num_attrs.
17831 Set DIEP to point to a newly allocated die with its information,
17832 except for its child, sibling, and parent fields.
17833 Set HAS_CHILDREN to tell whether the die has children or not. */
17835 static const gdb_byte
*
17836 read_full_die_1 (const struct die_reader_specs
*reader
,
17837 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17838 int *has_children
, int num_extra_attrs
)
17840 unsigned int abbrev_number
, bytes_read
, i
;
17841 struct abbrev_info
*abbrev
;
17842 struct die_info
*die
;
17843 struct dwarf2_cu
*cu
= reader
->cu
;
17844 bfd
*abfd
= reader
->abfd
;
17846 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
17847 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17848 info_ptr
+= bytes_read
;
17849 if (!abbrev_number
)
17856 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
17858 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
17860 bfd_get_filename (abfd
));
17862 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
17863 die
->sect_off
= sect_off
;
17864 die
->tag
= abbrev
->tag
;
17865 die
->abbrev
= abbrev_number
;
17867 /* Make the result usable.
17868 The caller needs to update num_attrs after adding the extra
17870 die
->num_attrs
= abbrev
->num_attrs
;
17872 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
17873 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
17877 *has_children
= abbrev
->has_children
;
17881 /* Read a die and all its attributes.
17882 Set DIEP to point to a newly allocated die with its information,
17883 except for its child, sibling, and parent fields.
17884 Set HAS_CHILDREN to tell whether the die has children or not. */
17886 static const gdb_byte
*
17887 read_full_die (const struct die_reader_specs
*reader
,
17888 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17891 const gdb_byte
*result
;
17893 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
17895 if (dwarf_die_debug
)
17897 fprintf_unfiltered (gdb_stdlog
,
17898 "Read die from %s@0x%x of %s:\n",
17899 get_section_name (reader
->die_section
),
17900 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17901 bfd_get_filename (reader
->abfd
));
17902 dump_die (*diep
, dwarf_die_debug
);
17908 /* Abbreviation tables.
17910 In DWARF version 2, the description of the debugging information is
17911 stored in a separate .debug_abbrev section. Before we read any
17912 dies from a section we read in all abbreviations and install them
17913 in a hash table. */
17915 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
17917 struct abbrev_info
*
17918 abbrev_table::alloc_abbrev ()
17920 struct abbrev_info
*abbrev
;
17922 abbrev
= XOBNEW (&abbrev_obstack
, struct abbrev_info
);
17923 memset (abbrev
, 0, sizeof (struct abbrev_info
));
17928 /* Add an abbreviation to the table. */
17931 abbrev_table::add_abbrev (unsigned int abbrev_number
,
17932 struct abbrev_info
*abbrev
)
17934 unsigned int hash_number
;
17936 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
17937 abbrev
->next
= m_abbrevs
[hash_number
];
17938 m_abbrevs
[hash_number
] = abbrev
;
17941 /* Look up an abbrev in the table.
17942 Returns NULL if the abbrev is not found. */
17944 struct abbrev_info
*
17945 abbrev_table::lookup_abbrev (unsigned int abbrev_number
)
17947 unsigned int hash_number
;
17948 struct abbrev_info
*abbrev
;
17950 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
17951 abbrev
= m_abbrevs
[hash_number
];
17955 if (abbrev
->number
== abbrev_number
)
17957 abbrev
= abbrev
->next
;
17962 /* Read in an abbrev table. */
17964 static abbrev_table_up
17965 abbrev_table_read_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
17966 struct dwarf2_section_info
*section
,
17967 sect_offset sect_off
)
17969 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17970 bfd
*abfd
= get_section_bfd_owner (section
);
17971 const gdb_byte
*abbrev_ptr
;
17972 struct abbrev_info
*cur_abbrev
;
17973 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
17974 unsigned int abbrev_form
;
17975 struct attr_abbrev
*cur_attrs
;
17976 unsigned int allocated_attrs
;
17978 abbrev_table_up
abbrev_table (new struct abbrev_table (sect_off
));
17980 dwarf2_read_section (objfile
, section
);
17981 abbrev_ptr
= section
->buffer
+ to_underlying (sect_off
);
17982 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
17983 abbrev_ptr
+= bytes_read
;
17985 allocated_attrs
= ATTR_ALLOC_CHUNK
;
17986 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
17988 /* Loop until we reach an abbrev number of 0. */
17989 while (abbrev_number
)
17991 cur_abbrev
= abbrev_table
->alloc_abbrev ();
17993 /* read in abbrev header */
17994 cur_abbrev
->number
= abbrev_number
;
17996 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
17997 abbrev_ptr
+= bytes_read
;
17998 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
18001 /* now read in declarations */
18004 LONGEST implicit_const
;
18006 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18007 abbrev_ptr
+= bytes_read
;
18008 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18009 abbrev_ptr
+= bytes_read
;
18010 if (abbrev_form
== DW_FORM_implicit_const
)
18012 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
18014 abbrev_ptr
+= bytes_read
;
18018 /* Initialize it due to a false compiler warning. */
18019 implicit_const
= -1;
18022 if (abbrev_name
== 0)
18025 if (cur_abbrev
->num_attrs
== allocated_attrs
)
18027 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
18029 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
18032 cur_attrs
[cur_abbrev
->num_attrs
].name
18033 = (enum dwarf_attribute
) abbrev_name
;
18034 cur_attrs
[cur_abbrev
->num_attrs
].form
18035 = (enum dwarf_form
) abbrev_form
;
18036 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
18037 ++cur_abbrev
->num_attrs
;
18040 cur_abbrev
->attrs
=
18041 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
18042 cur_abbrev
->num_attrs
);
18043 memcpy (cur_abbrev
->attrs
, cur_attrs
,
18044 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
18046 abbrev_table
->add_abbrev (abbrev_number
, cur_abbrev
);
18048 /* Get next abbreviation.
18049 Under Irix6 the abbreviations for a compilation unit are not
18050 always properly terminated with an abbrev number of 0.
18051 Exit loop if we encounter an abbreviation which we have
18052 already read (which means we are about to read the abbreviations
18053 for the next compile unit) or if the end of the abbreviation
18054 table is reached. */
18055 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
18057 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18058 abbrev_ptr
+= bytes_read
;
18059 if (abbrev_table
->lookup_abbrev (abbrev_number
) != NULL
)
18064 return abbrev_table
;
18067 /* Returns nonzero if TAG represents a type that we might generate a partial
18071 is_type_tag_for_partial (int tag
)
18076 /* Some types that would be reasonable to generate partial symbols for,
18077 that we don't at present. */
18078 case DW_TAG_array_type
:
18079 case DW_TAG_file_type
:
18080 case DW_TAG_ptr_to_member_type
:
18081 case DW_TAG_set_type
:
18082 case DW_TAG_string_type
:
18083 case DW_TAG_subroutine_type
:
18085 case DW_TAG_base_type
:
18086 case DW_TAG_class_type
:
18087 case DW_TAG_interface_type
:
18088 case DW_TAG_enumeration_type
:
18089 case DW_TAG_structure_type
:
18090 case DW_TAG_subrange_type
:
18091 case DW_TAG_typedef
:
18092 case DW_TAG_union_type
:
18099 /* Load all DIEs that are interesting for partial symbols into memory. */
18101 static struct partial_die_info
*
18102 load_partial_dies (const struct die_reader_specs
*reader
,
18103 const gdb_byte
*info_ptr
, int building_psymtab
)
18105 struct dwarf2_cu
*cu
= reader
->cu
;
18106 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18107 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18108 unsigned int bytes_read
;
18109 unsigned int load_all
= 0;
18110 int nesting_level
= 1;
18115 gdb_assert (cu
->per_cu
!= NULL
);
18116 if (cu
->per_cu
->load_all_dies
)
18120 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18124 &cu
->comp_unit_obstack
,
18125 hashtab_obstack_allocate
,
18126 dummy_obstack_deallocate
);
18130 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18132 /* A NULL abbrev means the end of a series of children. */
18133 if (abbrev
== NULL
)
18135 if (--nesting_level
== 0)
18138 info_ptr
+= bytes_read
;
18139 last_die
= parent_die
;
18140 parent_die
= parent_die
->die_parent
;
18144 /* Check for template arguments. We never save these; if
18145 they're seen, we just mark the parent, and go on our way. */
18146 if (parent_die
!= NULL
18147 && cu
->language
== language_cplus
18148 && (abbrev
->tag
== DW_TAG_template_type_param
18149 || abbrev
->tag
== DW_TAG_template_value_param
))
18151 parent_die
->has_template_arguments
= 1;
18155 /* We don't need a partial DIE for the template argument. */
18156 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18161 /* We only recurse into c++ subprograms looking for template arguments.
18162 Skip their other children. */
18164 && cu
->language
== language_cplus
18165 && parent_die
!= NULL
18166 && parent_die
->tag
== DW_TAG_subprogram
)
18168 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18172 /* Check whether this DIE is interesting enough to save. Normally
18173 we would not be interested in members here, but there may be
18174 later variables referencing them via DW_AT_specification (for
18175 static members). */
18177 && !is_type_tag_for_partial (abbrev
->tag
)
18178 && abbrev
->tag
!= DW_TAG_constant
18179 && abbrev
->tag
!= DW_TAG_enumerator
18180 && abbrev
->tag
!= DW_TAG_subprogram
18181 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18182 && abbrev
->tag
!= DW_TAG_lexical_block
18183 && abbrev
->tag
!= DW_TAG_variable
18184 && abbrev
->tag
!= DW_TAG_namespace
18185 && abbrev
->tag
!= DW_TAG_module
18186 && abbrev
->tag
!= DW_TAG_member
18187 && abbrev
->tag
!= DW_TAG_imported_unit
18188 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18190 /* Otherwise we skip to the next sibling, if any. */
18191 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18195 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18198 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18200 /* This two-pass algorithm for processing partial symbols has a
18201 high cost in cache pressure. Thus, handle some simple cases
18202 here which cover the majority of C partial symbols. DIEs
18203 which neither have specification tags in them, nor could have
18204 specification tags elsewhere pointing at them, can simply be
18205 processed and discarded.
18207 This segment is also optional; scan_partial_symbols and
18208 add_partial_symbol will handle these DIEs if we chain
18209 them in normally. When compilers which do not emit large
18210 quantities of duplicate debug information are more common,
18211 this code can probably be removed. */
18213 /* Any complete simple types at the top level (pretty much all
18214 of them, for a language without namespaces), can be processed
18216 if (parent_die
== NULL
18217 && pdi
.has_specification
== 0
18218 && pdi
.is_declaration
== 0
18219 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18220 || pdi
.tag
== DW_TAG_base_type
18221 || pdi
.tag
== DW_TAG_subrange_type
))
18223 if (building_psymtab
&& pdi
.name
!= NULL
)
18224 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18225 VAR_DOMAIN
, LOC_TYPEDEF
,
18226 &objfile
->static_psymbols
,
18227 0, cu
->language
, objfile
);
18228 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18232 /* The exception for DW_TAG_typedef with has_children above is
18233 a workaround of GCC PR debug/47510. In the case of this complaint
18234 type_name_or_error will error on such types later.
18236 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18237 it could not find the child DIEs referenced later, this is checked
18238 above. In correct DWARF DW_TAG_typedef should have no children. */
18240 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18241 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18242 "- DIE at %s [in module %s]"),
18243 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18245 /* If we're at the second level, and we're an enumerator, and
18246 our parent has no specification (meaning possibly lives in a
18247 namespace elsewhere), then we can add the partial symbol now
18248 instead of queueing it. */
18249 if (pdi
.tag
== DW_TAG_enumerator
18250 && parent_die
!= NULL
18251 && parent_die
->die_parent
== NULL
18252 && parent_die
->tag
== DW_TAG_enumeration_type
18253 && parent_die
->has_specification
== 0)
18255 if (pdi
.name
== NULL
)
18256 complaint (_("malformed enumerator DIE ignored"));
18257 else if (building_psymtab
)
18258 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18259 VAR_DOMAIN
, LOC_CONST
,
18260 cu
->language
== language_cplus
18261 ? &objfile
->global_psymbols
18262 : &objfile
->static_psymbols
,
18263 0, cu
->language
, objfile
);
18265 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18269 struct partial_die_info
*part_die
18270 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18272 /* We'll save this DIE so link it in. */
18273 part_die
->die_parent
= parent_die
;
18274 part_die
->die_sibling
= NULL
;
18275 part_die
->die_child
= NULL
;
18277 if (last_die
&& last_die
== parent_die
)
18278 last_die
->die_child
= part_die
;
18280 last_die
->die_sibling
= part_die
;
18282 last_die
= part_die
;
18284 if (first_die
== NULL
)
18285 first_die
= part_die
;
18287 /* Maybe add the DIE to the hash table. Not all DIEs that we
18288 find interesting need to be in the hash table, because we
18289 also have the parent/sibling/child chains; only those that we
18290 might refer to by offset later during partial symbol reading.
18292 For now this means things that might have be the target of a
18293 DW_AT_specification, DW_AT_abstract_origin, or
18294 DW_AT_extension. DW_AT_extension will refer only to
18295 namespaces; DW_AT_abstract_origin refers to functions (and
18296 many things under the function DIE, but we do not recurse
18297 into function DIEs during partial symbol reading) and
18298 possibly variables as well; DW_AT_specification refers to
18299 declarations. Declarations ought to have the DW_AT_declaration
18300 flag. It happens that GCC forgets to put it in sometimes, but
18301 only for functions, not for types.
18303 Adding more things than necessary to the hash table is harmless
18304 except for the performance cost. Adding too few will result in
18305 wasted time in find_partial_die, when we reread the compilation
18306 unit with load_all_dies set. */
18309 || abbrev
->tag
== DW_TAG_constant
18310 || abbrev
->tag
== DW_TAG_subprogram
18311 || abbrev
->tag
== DW_TAG_variable
18312 || abbrev
->tag
== DW_TAG_namespace
18313 || part_die
->is_declaration
)
18317 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18318 to_underlying (part_die
->sect_off
),
18323 /* For some DIEs we want to follow their children (if any). For C
18324 we have no reason to follow the children of structures; for other
18325 languages we have to, so that we can get at method physnames
18326 to infer fully qualified class names, for DW_AT_specification,
18327 and for C++ template arguments. For C++, we also look one level
18328 inside functions to find template arguments (if the name of the
18329 function does not already contain the template arguments).
18331 For Ada, we need to scan the children of subprograms and lexical
18332 blocks as well because Ada allows the definition of nested
18333 entities that could be interesting for the debugger, such as
18334 nested subprograms for instance. */
18335 if (last_die
->has_children
18337 || last_die
->tag
== DW_TAG_namespace
18338 || last_die
->tag
== DW_TAG_module
18339 || last_die
->tag
== DW_TAG_enumeration_type
18340 || (cu
->language
== language_cplus
18341 && last_die
->tag
== DW_TAG_subprogram
18342 && (last_die
->name
== NULL
18343 || strchr (last_die
->name
, '<') == NULL
))
18344 || (cu
->language
!= language_c
18345 && (last_die
->tag
== DW_TAG_class_type
18346 || last_die
->tag
== DW_TAG_interface_type
18347 || last_die
->tag
== DW_TAG_structure_type
18348 || last_die
->tag
== DW_TAG_union_type
))
18349 || (cu
->language
== language_ada
18350 && (last_die
->tag
== DW_TAG_subprogram
18351 || last_die
->tag
== DW_TAG_lexical_block
))))
18354 parent_die
= last_die
;
18358 /* Otherwise we skip to the next sibling, if any. */
18359 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18361 /* Back to the top, do it again. */
18365 partial_die_info::partial_die_info (sect_offset sect_off_
,
18366 struct abbrev_info
*abbrev
)
18367 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18371 /* Read a minimal amount of information into the minimal die structure.
18372 INFO_PTR should point just after the initial uleb128 of a DIE. */
18375 partial_die_info::read (const struct die_reader_specs
*reader
,
18376 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18378 struct dwarf2_cu
*cu
= reader
->cu
;
18379 struct dwarf2_per_objfile
*dwarf2_per_objfile
18380 = cu
->per_cu
->dwarf2_per_objfile
;
18382 int has_low_pc_attr
= 0;
18383 int has_high_pc_attr
= 0;
18384 int high_pc_relative
= 0;
18386 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18388 struct attribute attr
;
18390 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
], info_ptr
);
18392 /* Store the data if it is of an attribute we want to keep in a
18393 partial symbol table. */
18399 case DW_TAG_compile_unit
:
18400 case DW_TAG_partial_unit
:
18401 case DW_TAG_type_unit
:
18402 /* Compilation units have a DW_AT_name that is a filename, not
18403 a source language identifier. */
18404 case DW_TAG_enumeration_type
:
18405 case DW_TAG_enumerator
:
18406 /* These tags always have simple identifiers already; no need
18407 to canonicalize them. */
18408 name
= DW_STRING (&attr
);
18412 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18415 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
18416 &objfile
->per_bfd
->storage_obstack
);
18421 case DW_AT_linkage_name
:
18422 case DW_AT_MIPS_linkage_name
:
18423 /* Note that both forms of linkage name might appear. We
18424 assume they will be the same, and we only store the last
18426 if (cu
->language
== language_ada
)
18427 name
= DW_STRING (&attr
);
18428 linkage_name
= DW_STRING (&attr
);
18431 has_low_pc_attr
= 1;
18432 lowpc
= attr_value_as_address (&attr
);
18434 case DW_AT_high_pc
:
18435 has_high_pc_attr
= 1;
18436 highpc
= attr_value_as_address (&attr
);
18437 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
18438 high_pc_relative
= 1;
18440 case DW_AT_location
:
18441 /* Support the .debug_loc offsets. */
18442 if (attr_form_is_block (&attr
))
18444 d
.locdesc
= DW_BLOCK (&attr
);
18446 else if (attr_form_is_section_offset (&attr
))
18448 dwarf2_complex_location_expr_complaint ();
18452 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18453 "partial symbol information");
18456 case DW_AT_external
:
18457 is_external
= DW_UNSND (&attr
);
18459 case DW_AT_declaration
:
18460 is_declaration
= DW_UNSND (&attr
);
18465 case DW_AT_abstract_origin
:
18466 case DW_AT_specification
:
18467 case DW_AT_extension
:
18468 has_specification
= 1;
18469 spec_offset
= dwarf2_get_ref_die_offset (&attr
);
18470 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18471 || cu
->per_cu
->is_dwz
);
18473 case DW_AT_sibling
:
18474 /* Ignore absolute siblings, they might point outside of
18475 the current compile unit. */
18476 if (attr
.form
== DW_FORM_ref_addr
)
18477 complaint (_("ignoring absolute DW_AT_sibling"));
18480 const gdb_byte
*buffer
= reader
->buffer
;
18481 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
18482 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18484 if (sibling_ptr
< info_ptr
)
18485 complaint (_("DW_AT_sibling points backwards"));
18486 else if (sibling_ptr
> reader
->buffer_end
)
18487 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
18489 sibling
= sibling_ptr
;
18492 case DW_AT_byte_size
:
18495 case DW_AT_const_value
:
18496 has_const_value
= 1;
18498 case DW_AT_calling_convention
:
18499 /* DWARF doesn't provide a way to identify a program's source-level
18500 entry point. DW_AT_calling_convention attributes are only meant
18501 to describe functions' calling conventions.
18503 However, because it's a necessary piece of information in
18504 Fortran, and before DWARF 4 DW_CC_program was the only
18505 piece of debugging information whose definition refers to
18506 a 'main program' at all, several compilers marked Fortran
18507 main programs with DW_CC_program --- even when those
18508 functions use the standard calling conventions.
18510 Although DWARF now specifies a way to provide this
18511 information, we support this practice for backward
18513 if (DW_UNSND (&attr
) == DW_CC_program
18514 && cu
->language
== language_fortran
)
18515 main_subprogram
= 1;
18518 if (DW_UNSND (&attr
) == DW_INL_inlined
18519 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18520 may_be_inlined
= 1;
18524 if (tag
== DW_TAG_imported_unit
)
18526 d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
18527 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18528 || cu
->per_cu
->is_dwz
);
18532 case DW_AT_main_subprogram
:
18533 main_subprogram
= DW_UNSND (&attr
);
18541 if (high_pc_relative
)
18544 if (has_low_pc_attr
&& has_high_pc_attr
)
18546 /* When using the GNU linker, .gnu.linkonce. sections are used to
18547 eliminate duplicate copies of functions and vtables and such.
18548 The linker will arbitrarily choose one and discard the others.
18549 The AT_*_pc values for such functions refer to local labels in
18550 these sections. If the section from that file was discarded, the
18551 labels are not in the output, so the relocs get a value of 0.
18552 If this is a discarded function, mark the pc bounds as invalid,
18553 so that GDB will ignore it. */
18554 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18556 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18557 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18559 complaint (_("DW_AT_low_pc %s is zero "
18560 "for DIE at %s [in module %s]"),
18561 paddress (gdbarch
, lowpc
),
18562 sect_offset_str (sect_off
),
18563 objfile_name (objfile
));
18565 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18566 else if (lowpc
>= highpc
)
18568 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18569 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18571 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18572 "for DIE at %s [in module %s]"),
18573 paddress (gdbarch
, lowpc
),
18574 paddress (gdbarch
, highpc
),
18575 sect_offset_str (sect_off
),
18576 objfile_name (objfile
));
18585 /* Find a cached partial DIE at OFFSET in CU. */
18587 struct partial_die_info
*
18588 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18590 struct partial_die_info
*lookup_die
= NULL
;
18591 struct partial_die_info
part_die (sect_off
);
18593 lookup_die
= ((struct partial_die_info
*)
18594 htab_find_with_hash (partial_dies
, &part_die
,
18595 to_underlying (sect_off
)));
18600 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18601 except in the case of .debug_types DIEs which do not reference
18602 outside their CU (they do however referencing other types via
18603 DW_FORM_ref_sig8). */
18605 static struct partial_die_info
*
18606 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18608 struct dwarf2_per_objfile
*dwarf2_per_objfile
18609 = cu
->per_cu
->dwarf2_per_objfile
;
18610 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18611 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18612 struct partial_die_info
*pd
= NULL
;
18614 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18615 && offset_in_cu_p (&cu
->header
, sect_off
))
18617 pd
= cu
->find_partial_die (sect_off
);
18620 /* We missed recording what we needed.
18621 Load all dies and try again. */
18622 per_cu
= cu
->per_cu
;
18626 /* TUs don't reference other CUs/TUs (except via type signatures). */
18627 if (cu
->per_cu
->is_debug_types
)
18629 error (_("Dwarf Error: Type Unit at offset %s contains"
18630 " external reference to offset %s [in module %s].\n"),
18631 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18632 bfd_get_filename (objfile
->obfd
));
18634 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18635 dwarf2_per_objfile
);
18637 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18638 load_partial_comp_unit (per_cu
);
18640 per_cu
->cu
->last_used
= 0;
18641 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18644 /* If we didn't find it, and not all dies have been loaded,
18645 load them all and try again. */
18647 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18649 per_cu
->load_all_dies
= 1;
18651 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18652 THIS_CU->cu may already be in use. So we can't just free it and
18653 replace its DIEs with the ones we read in. Instead, we leave those
18654 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18655 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18657 load_partial_comp_unit (per_cu
);
18659 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18663 internal_error (__FILE__
, __LINE__
,
18664 _("could not find partial DIE %s "
18665 "in cache [from module %s]\n"),
18666 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18670 /* See if we can figure out if the class lives in a namespace. We do
18671 this by looking for a member function; its demangled name will
18672 contain namespace info, if there is any. */
18675 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18676 struct dwarf2_cu
*cu
)
18678 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18679 what template types look like, because the demangler
18680 frequently doesn't give the same name as the debug info. We
18681 could fix this by only using the demangled name to get the
18682 prefix (but see comment in read_structure_type). */
18684 struct partial_die_info
*real_pdi
;
18685 struct partial_die_info
*child_pdi
;
18687 /* If this DIE (this DIE's specification, if any) has a parent, then
18688 we should not do this. We'll prepend the parent's fully qualified
18689 name when we create the partial symbol. */
18691 real_pdi
= struct_pdi
;
18692 while (real_pdi
->has_specification
)
18693 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
18694 real_pdi
->spec_is_dwz
, cu
);
18696 if (real_pdi
->die_parent
!= NULL
)
18699 for (child_pdi
= struct_pdi
->die_child
;
18701 child_pdi
= child_pdi
->die_sibling
)
18703 if (child_pdi
->tag
== DW_TAG_subprogram
18704 && child_pdi
->linkage_name
!= NULL
)
18706 char *actual_class_name
18707 = language_class_name_from_physname (cu
->language_defn
,
18708 child_pdi
->linkage_name
);
18709 if (actual_class_name
!= NULL
)
18711 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18714 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
18716 strlen (actual_class_name
)));
18717 xfree (actual_class_name
);
18725 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18727 /* Once we've fixed up a die, there's no point in doing so again.
18728 This also avoids a memory leak if we were to call
18729 guess_partial_die_structure_name multiple times. */
18733 /* If we found a reference attribute and the DIE has no name, try
18734 to find a name in the referred to DIE. */
18736 if (name
== NULL
&& has_specification
)
18738 struct partial_die_info
*spec_die
;
18740 spec_die
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18742 spec_die
->fixup (cu
);
18744 if (spec_die
->name
)
18746 name
= spec_die
->name
;
18748 /* Copy DW_AT_external attribute if it is set. */
18749 if (spec_die
->is_external
)
18750 is_external
= spec_die
->is_external
;
18754 /* Set default names for some unnamed DIEs. */
18756 if (name
== NULL
&& tag
== DW_TAG_namespace
)
18757 name
= CP_ANONYMOUS_NAMESPACE_STR
;
18759 /* If there is no parent die to provide a namespace, and there are
18760 children, see if we can determine the namespace from their linkage
18762 if (cu
->language
== language_cplus
18763 && !VEC_empty (dwarf2_section_info_def
,
18764 cu
->per_cu
->dwarf2_per_objfile
->types
)
18765 && die_parent
== NULL
18767 && (tag
== DW_TAG_class_type
18768 || tag
== DW_TAG_structure_type
18769 || tag
== DW_TAG_union_type
))
18770 guess_partial_die_structure_name (this, cu
);
18772 /* GCC might emit a nameless struct or union that has a linkage
18773 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18775 && (tag
== DW_TAG_class_type
18776 || tag
== DW_TAG_interface_type
18777 || tag
== DW_TAG_structure_type
18778 || tag
== DW_TAG_union_type
)
18779 && linkage_name
!= NULL
)
18783 demangled
= gdb_demangle (linkage_name
, DMGL_TYPES
);
18788 /* Strip any leading namespaces/classes, keep only the base name.
18789 DW_AT_name for named DIEs does not contain the prefixes. */
18790 base
= strrchr (demangled
, ':');
18791 if (base
&& base
> demangled
&& base
[-1] == ':')
18796 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18799 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
18800 base
, strlen (base
)));
18808 /* Read an attribute value described by an attribute form. */
18810 static const gdb_byte
*
18811 read_attribute_value (const struct die_reader_specs
*reader
,
18812 struct attribute
*attr
, unsigned form
,
18813 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
18815 struct dwarf2_cu
*cu
= reader
->cu
;
18816 struct dwarf2_per_objfile
*dwarf2_per_objfile
18817 = cu
->per_cu
->dwarf2_per_objfile
;
18818 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18819 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18820 bfd
*abfd
= reader
->abfd
;
18821 struct comp_unit_head
*cu_header
= &cu
->header
;
18822 unsigned int bytes_read
;
18823 struct dwarf_block
*blk
;
18825 attr
->form
= (enum dwarf_form
) form
;
18828 case DW_FORM_ref_addr
:
18829 if (cu
->header
.version
== 2)
18830 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18832 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
18833 &cu
->header
, &bytes_read
);
18834 info_ptr
+= bytes_read
;
18836 case DW_FORM_GNU_ref_alt
:
18837 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18838 info_ptr
+= bytes_read
;
18841 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18842 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
18843 info_ptr
+= bytes_read
;
18845 case DW_FORM_block2
:
18846 blk
= dwarf_alloc_block (cu
);
18847 blk
->size
= read_2_bytes (abfd
, info_ptr
);
18849 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18850 info_ptr
+= blk
->size
;
18851 DW_BLOCK (attr
) = blk
;
18853 case DW_FORM_block4
:
18854 blk
= dwarf_alloc_block (cu
);
18855 blk
->size
= read_4_bytes (abfd
, info_ptr
);
18857 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18858 info_ptr
+= blk
->size
;
18859 DW_BLOCK (attr
) = blk
;
18861 case DW_FORM_data2
:
18862 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
18865 case DW_FORM_data4
:
18866 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
18869 case DW_FORM_data8
:
18870 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
18873 case DW_FORM_data16
:
18874 blk
= dwarf_alloc_block (cu
);
18876 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
18878 DW_BLOCK (attr
) = blk
;
18880 case DW_FORM_sec_offset
:
18881 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18882 info_ptr
+= bytes_read
;
18884 case DW_FORM_string
:
18885 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
18886 DW_STRING_IS_CANONICAL (attr
) = 0;
18887 info_ptr
+= bytes_read
;
18890 if (!cu
->per_cu
->is_dwz
)
18892 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
18893 abfd
, info_ptr
, cu_header
,
18895 DW_STRING_IS_CANONICAL (attr
) = 0;
18896 info_ptr
+= bytes_read
;
18900 case DW_FORM_line_strp
:
18901 if (!cu
->per_cu
->is_dwz
)
18903 DW_STRING (attr
) = read_indirect_line_string (dwarf2_per_objfile
,
18905 cu_header
, &bytes_read
);
18906 DW_STRING_IS_CANONICAL (attr
) = 0;
18907 info_ptr
+= bytes_read
;
18911 case DW_FORM_GNU_strp_alt
:
18913 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
18914 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
18917 DW_STRING (attr
) = read_indirect_string_from_dwz (objfile
,
18919 DW_STRING_IS_CANONICAL (attr
) = 0;
18920 info_ptr
+= bytes_read
;
18923 case DW_FORM_exprloc
:
18924 case DW_FORM_block
:
18925 blk
= dwarf_alloc_block (cu
);
18926 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18927 info_ptr
+= bytes_read
;
18928 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18929 info_ptr
+= blk
->size
;
18930 DW_BLOCK (attr
) = blk
;
18932 case DW_FORM_block1
:
18933 blk
= dwarf_alloc_block (cu
);
18934 blk
->size
= read_1_byte (abfd
, info_ptr
);
18936 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18937 info_ptr
+= blk
->size
;
18938 DW_BLOCK (attr
) = blk
;
18940 case DW_FORM_data1
:
18941 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
18945 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
18948 case DW_FORM_flag_present
:
18949 DW_UNSND (attr
) = 1;
18951 case DW_FORM_sdata
:
18952 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
18953 info_ptr
+= bytes_read
;
18955 case DW_FORM_udata
:
18956 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18957 info_ptr
+= bytes_read
;
18960 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18961 + read_1_byte (abfd
, info_ptr
));
18965 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18966 + read_2_bytes (abfd
, info_ptr
));
18970 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18971 + read_4_bytes (abfd
, info_ptr
));
18975 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18976 + read_8_bytes (abfd
, info_ptr
));
18979 case DW_FORM_ref_sig8
:
18980 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
18983 case DW_FORM_ref_udata
:
18984 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18985 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
18986 info_ptr
+= bytes_read
;
18988 case DW_FORM_indirect
:
18989 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18990 info_ptr
+= bytes_read
;
18991 if (form
== DW_FORM_implicit_const
)
18993 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
18994 info_ptr
+= bytes_read
;
18996 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
18999 case DW_FORM_implicit_const
:
19000 DW_SND (attr
) = implicit_const
;
19002 case DW_FORM_GNU_addr_index
:
19003 if (reader
->dwo_file
== NULL
)
19005 /* For now flag a hard error.
19006 Later we can turn this into a complaint. */
19007 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19008 dwarf_form_name (form
),
19009 bfd_get_filename (abfd
));
19011 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
19012 info_ptr
+= bytes_read
;
19014 case DW_FORM_GNU_str_index
:
19015 if (reader
->dwo_file
== NULL
)
19017 /* For now flag a hard error.
19018 Later we can turn this into a complaint if warranted. */
19019 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19020 dwarf_form_name (form
),
19021 bfd_get_filename (abfd
));
19024 ULONGEST str_index
=
19025 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19027 DW_STRING (attr
) = read_str_index (reader
, str_index
);
19028 DW_STRING_IS_CANONICAL (attr
) = 0;
19029 info_ptr
+= bytes_read
;
19033 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19034 dwarf_form_name (form
),
19035 bfd_get_filename (abfd
));
19039 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
19040 attr
->form
= DW_FORM_GNU_ref_alt
;
19042 /* We have seen instances where the compiler tried to emit a byte
19043 size attribute of -1 which ended up being encoded as an unsigned
19044 0xffffffff. Although 0xffffffff is technically a valid size value,
19045 an object of this size seems pretty unlikely so we can relatively
19046 safely treat these cases as if the size attribute was invalid and
19047 treat them as zero by default. */
19048 if (attr
->name
== DW_AT_byte_size
19049 && form
== DW_FORM_data4
19050 && DW_UNSND (attr
) >= 0xffffffff)
19053 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19054 hex_string (DW_UNSND (attr
)));
19055 DW_UNSND (attr
) = 0;
19061 /* Read an attribute described by an abbreviated attribute. */
19063 static const gdb_byte
*
19064 read_attribute (const struct die_reader_specs
*reader
,
19065 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19066 const gdb_byte
*info_ptr
)
19068 attr
->name
= abbrev
->name
;
19069 return read_attribute_value (reader
, attr
, abbrev
->form
,
19070 abbrev
->implicit_const
, info_ptr
);
19073 /* Read dwarf information from a buffer. */
19075 static unsigned int
19076 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
19078 return bfd_get_8 (abfd
, buf
);
19082 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
19084 return bfd_get_signed_8 (abfd
, buf
);
19087 static unsigned int
19088 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19090 return bfd_get_16 (abfd
, buf
);
19094 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19096 return bfd_get_signed_16 (abfd
, buf
);
19099 static unsigned int
19100 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19102 return bfd_get_32 (abfd
, buf
);
19106 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19108 return bfd_get_signed_32 (abfd
, buf
);
19112 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19114 return bfd_get_64 (abfd
, buf
);
19118 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
19119 unsigned int *bytes_read
)
19121 struct comp_unit_head
*cu_header
= &cu
->header
;
19122 CORE_ADDR retval
= 0;
19124 if (cu_header
->signed_addr_p
)
19126 switch (cu_header
->addr_size
)
19129 retval
= bfd_get_signed_16 (abfd
, buf
);
19132 retval
= bfd_get_signed_32 (abfd
, buf
);
19135 retval
= bfd_get_signed_64 (abfd
, buf
);
19138 internal_error (__FILE__
, __LINE__
,
19139 _("read_address: bad switch, signed [in module %s]"),
19140 bfd_get_filename (abfd
));
19145 switch (cu_header
->addr_size
)
19148 retval
= bfd_get_16 (abfd
, buf
);
19151 retval
= bfd_get_32 (abfd
, buf
);
19154 retval
= bfd_get_64 (abfd
, buf
);
19157 internal_error (__FILE__
, __LINE__
,
19158 _("read_address: bad switch, "
19159 "unsigned [in module %s]"),
19160 bfd_get_filename (abfd
));
19164 *bytes_read
= cu_header
->addr_size
;
19168 /* Read the initial length from a section. The (draft) DWARF 3
19169 specification allows the initial length to take up either 4 bytes
19170 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
19171 bytes describe the length and all offsets will be 8 bytes in length
19174 An older, non-standard 64-bit format is also handled by this
19175 function. The older format in question stores the initial length
19176 as an 8-byte quantity without an escape value. Lengths greater
19177 than 2^32 aren't very common which means that the initial 4 bytes
19178 is almost always zero. Since a length value of zero doesn't make
19179 sense for the 32-bit format, this initial zero can be considered to
19180 be an escape value which indicates the presence of the older 64-bit
19181 format. As written, the code can't detect (old format) lengths
19182 greater than 4GB. If it becomes necessary to handle lengths
19183 somewhat larger than 4GB, we could allow other small values (such
19184 as the non-sensical values of 1, 2, and 3) to also be used as
19185 escape values indicating the presence of the old format.
19187 The value returned via bytes_read should be used to increment the
19188 relevant pointer after calling read_initial_length().
19190 [ Note: read_initial_length() and read_offset() are based on the
19191 document entitled "DWARF Debugging Information Format", revision
19192 3, draft 8, dated November 19, 2001. This document was obtained
19195 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
19197 This document is only a draft and is subject to change. (So beware.)
19199 Details regarding the older, non-standard 64-bit format were
19200 determined empirically by examining 64-bit ELF files produced by
19201 the SGI toolchain on an IRIX 6.5 machine.
19203 - Kevin, July 16, 2002
19207 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
19209 LONGEST length
= bfd_get_32 (abfd
, buf
);
19211 if (length
== 0xffffffff)
19213 length
= bfd_get_64 (abfd
, buf
+ 4);
19216 else if (length
== 0)
19218 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
19219 length
= bfd_get_64 (abfd
, buf
);
19230 /* Cover function for read_initial_length.
19231 Returns the length of the object at BUF, and stores the size of the
19232 initial length in *BYTES_READ and stores the size that offsets will be in
19234 If the initial length size is not equivalent to that specified in
19235 CU_HEADER then issue a complaint.
19236 This is useful when reading non-comp-unit headers. */
19239 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
19240 const struct comp_unit_head
*cu_header
,
19241 unsigned int *bytes_read
,
19242 unsigned int *offset_size
)
19244 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
19246 gdb_assert (cu_header
->initial_length_size
== 4
19247 || cu_header
->initial_length_size
== 8
19248 || cu_header
->initial_length_size
== 12);
19250 if (cu_header
->initial_length_size
!= *bytes_read
)
19251 complaint (_("intermixed 32-bit and 64-bit DWARF sections"));
19253 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
19257 /* Read an offset from the data stream. The size of the offset is
19258 given by cu_header->offset_size. */
19261 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
19262 const struct comp_unit_head
*cu_header
,
19263 unsigned int *bytes_read
)
19265 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
19267 *bytes_read
= cu_header
->offset_size
;
19271 /* Read an offset from the data stream. */
19274 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
19276 LONGEST retval
= 0;
19278 switch (offset_size
)
19281 retval
= bfd_get_32 (abfd
, buf
);
19284 retval
= bfd_get_64 (abfd
, buf
);
19287 internal_error (__FILE__
, __LINE__
,
19288 _("read_offset_1: bad switch [in module %s]"),
19289 bfd_get_filename (abfd
));
19295 static const gdb_byte
*
19296 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
19298 /* If the size of a host char is 8 bits, we can return a pointer
19299 to the buffer, otherwise we have to copy the data to a buffer
19300 allocated on the temporary obstack. */
19301 gdb_assert (HOST_CHAR_BIT
== 8);
19305 static const char *
19306 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
19307 unsigned int *bytes_read_ptr
)
19309 /* If the size of a host char is 8 bits, we can return a pointer
19310 to the string, otherwise we have to copy the string to a buffer
19311 allocated on the temporary obstack. */
19312 gdb_assert (HOST_CHAR_BIT
== 8);
19315 *bytes_read_ptr
= 1;
19318 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
19319 return (const char *) buf
;
19322 /* Return pointer to string at section SECT offset STR_OFFSET with error
19323 reporting strings FORM_NAME and SECT_NAME. */
19325 static const char *
19326 read_indirect_string_at_offset_from (struct objfile
*objfile
,
19327 bfd
*abfd
, LONGEST str_offset
,
19328 struct dwarf2_section_info
*sect
,
19329 const char *form_name
,
19330 const char *sect_name
)
19332 dwarf2_read_section (objfile
, sect
);
19333 if (sect
->buffer
== NULL
)
19334 error (_("%s used without %s section [in module %s]"),
19335 form_name
, sect_name
, bfd_get_filename (abfd
));
19336 if (str_offset
>= sect
->size
)
19337 error (_("%s pointing outside of %s section [in module %s]"),
19338 form_name
, sect_name
, bfd_get_filename (abfd
));
19339 gdb_assert (HOST_CHAR_BIT
== 8);
19340 if (sect
->buffer
[str_offset
] == '\0')
19342 return (const char *) (sect
->buffer
+ str_offset
);
19345 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19347 static const char *
19348 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19349 bfd
*abfd
, LONGEST str_offset
)
19351 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19353 &dwarf2_per_objfile
->str
,
19354 "DW_FORM_strp", ".debug_str");
19357 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
19359 static const char *
19360 read_indirect_line_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19361 bfd
*abfd
, LONGEST str_offset
)
19363 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19365 &dwarf2_per_objfile
->line_str
,
19366 "DW_FORM_line_strp",
19367 ".debug_line_str");
19370 /* Read a string at offset STR_OFFSET in the .debug_str section from
19371 the .dwz file DWZ. Throw an error if the offset is too large. If
19372 the string consists of a single NUL byte, return NULL; otherwise
19373 return a pointer to the string. */
19375 static const char *
19376 read_indirect_string_from_dwz (struct objfile
*objfile
, struct dwz_file
*dwz
,
19377 LONGEST str_offset
)
19379 dwarf2_read_section (objfile
, &dwz
->str
);
19381 if (dwz
->str
.buffer
== NULL
)
19382 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
19383 "section [in module %s]"),
19384 bfd_get_filename (dwz
->dwz_bfd
));
19385 if (str_offset
>= dwz
->str
.size
)
19386 error (_("DW_FORM_GNU_strp_alt pointing outside of "
19387 ".debug_str section [in module %s]"),
19388 bfd_get_filename (dwz
->dwz_bfd
));
19389 gdb_assert (HOST_CHAR_BIT
== 8);
19390 if (dwz
->str
.buffer
[str_offset
] == '\0')
19392 return (const char *) (dwz
->str
.buffer
+ str_offset
);
19395 /* Return pointer to string at .debug_str offset as read from BUF.
19396 BUF is assumed to be in a compilation unit described by CU_HEADER.
19397 Return *BYTES_READ_PTR count of bytes read from BUF. */
19399 static const char *
19400 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19401 const gdb_byte
*buf
,
19402 const struct comp_unit_head
*cu_header
,
19403 unsigned int *bytes_read_ptr
)
19405 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19407 return read_indirect_string_at_offset (dwarf2_per_objfile
, abfd
, str_offset
);
19410 /* Return pointer to string at .debug_line_str offset as read from BUF.
19411 BUF is assumed to be in a compilation unit described by CU_HEADER.
19412 Return *BYTES_READ_PTR count of bytes read from BUF. */
19414 static const char *
19415 read_indirect_line_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19416 bfd
*abfd
, const gdb_byte
*buf
,
19417 const struct comp_unit_head
*cu_header
,
19418 unsigned int *bytes_read_ptr
)
19420 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19422 return read_indirect_line_string_at_offset (dwarf2_per_objfile
, abfd
,
19427 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19428 unsigned int *bytes_read_ptr
)
19431 unsigned int num_read
;
19433 unsigned char byte
;
19440 byte
= bfd_get_8 (abfd
, buf
);
19443 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19444 if ((byte
& 128) == 0)
19450 *bytes_read_ptr
= num_read
;
19455 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19456 unsigned int *bytes_read_ptr
)
19459 int shift
, num_read
;
19460 unsigned char byte
;
19467 byte
= bfd_get_8 (abfd
, buf
);
19470 result
|= ((LONGEST
) (byte
& 127) << shift
);
19472 if ((byte
& 128) == 0)
19477 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
19478 result
|= -(((LONGEST
) 1) << shift
);
19479 *bytes_read_ptr
= num_read
;
19483 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19484 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
19485 ADDR_SIZE is the size of addresses from the CU header. */
19488 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19489 unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
19491 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19492 bfd
*abfd
= objfile
->obfd
;
19493 const gdb_byte
*info_ptr
;
19495 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
19496 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19497 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19498 objfile_name (objfile
));
19499 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
19500 error (_("DW_FORM_addr_index pointing outside of "
19501 ".debug_addr section [in module %s]"),
19502 objfile_name (objfile
));
19503 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19504 + addr_base
+ addr_index
* addr_size
);
19505 if (addr_size
== 4)
19506 return bfd_get_32 (abfd
, info_ptr
);
19508 return bfd_get_64 (abfd
, info_ptr
);
19511 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19514 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19516 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19517 cu
->addr_base
, cu
->header
.addr_size
);
19520 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19523 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19524 unsigned int *bytes_read
)
19526 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19527 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19529 return read_addr_index (cu
, addr_index
);
19532 /* Data structure to pass results from dwarf2_read_addr_index_reader
19533 back to dwarf2_read_addr_index. */
19535 struct dwarf2_read_addr_index_data
19537 ULONGEST addr_base
;
19541 /* die_reader_func for dwarf2_read_addr_index. */
19544 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
19545 const gdb_byte
*info_ptr
,
19546 struct die_info
*comp_unit_die
,
19550 struct dwarf2_cu
*cu
= reader
->cu
;
19551 struct dwarf2_read_addr_index_data
*aidata
=
19552 (struct dwarf2_read_addr_index_data
*) data
;
19554 aidata
->addr_base
= cu
->addr_base
;
19555 aidata
->addr_size
= cu
->header
.addr_size
;
19558 /* Given an index in .debug_addr, fetch the value.
19559 NOTE: This can be called during dwarf expression evaluation,
19560 long after the debug information has been read, and thus per_cu->cu
19561 may no longer exist. */
19564 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
19565 unsigned int addr_index
)
19567 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19568 struct dwarf2_cu
*cu
= per_cu
->cu
;
19569 ULONGEST addr_base
;
19572 /* We need addr_base and addr_size.
19573 If we don't have PER_CU->cu, we have to get it.
19574 Nasty, but the alternative is storing the needed info in PER_CU,
19575 which at this point doesn't seem justified: it's not clear how frequently
19576 it would get used and it would increase the size of every PER_CU.
19577 Entry points like dwarf2_per_cu_addr_size do a similar thing
19578 so we're not in uncharted territory here.
19579 Alas we need to be a bit more complicated as addr_base is contained
19582 We don't need to read the entire CU(/TU).
19583 We just need the header and top level die.
19585 IWBN to use the aging mechanism to let us lazily later discard the CU.
19586 For now we skip this optimization. */
19590 addr_base
= cu
->addr_base
;
19591 addr_size
= cu
->header
.addr_size
;
19595 struct dwarf2_read_addr_index_data aidata
;
19597 /* Note: We can't use init_cutu_and_read_dies_simple here,
19598 we need addr_base. */
19599 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0, false,
19600 dwarf2_read_addr_index_reader
, &aidata
);
19601 addr_base
= aidata
.addr_base
;
19602 addr_size
= aidata
.addr_size
;
19605 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19609 /* Given a DW_FORM_GNU_str_index, fetch the string.
19610 This is only used by the Fission support. */
19612 static const char *
19613 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19615 struct dwarf2_cu
*cu
= reader
->cu
;
19616 struct dwarf2_per_objfile
*dwarf2_per_objfile
19617 = cu
->per_cu
->dwarf2_per_objfile
;
19618 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19619 const char *objf_name
= objfile_name (objfile
);
19620 bfd
*abfd
= objfile
->obfd
;
19621 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
19622 struct dwarf2_section_info
*str_offsets_section
=
19623 &reader
->dwo_file
->sections
.str_offsets
;
19624 const gdb_byte
*info_ptr
;
19625 ULONGEST str_offset
;
19626 static const char form_name
[] = "DW_FORM_GNU_str_index";
19628 dwarf2_read_section (objfile
, str_section
);
19629 dwarf2_read_section (objfile
, str_offsets_section
);
19630 if (str_section
->buffer
== NULL
)
19631 error (_("%s used without .debug_str.dwo section"
19632 " in CU at offset %s [in module %s]"),
19633 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19634 if (str_offsets_section
->buffer
== NULL
)
19635 error (_("%s used without .debug_str_offsets.dwo section"
19636 " in CU at offset %s [in module %s]"),
19637 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19638 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
19639 error (_("%s pointing outside of .debug_str_offsets.dwo"
19640 " section in CU at offset %s [in module %s]"),
19641 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19642 info_ptr
= (str_offsets_section
->buffer
19643 + str_index
* cu
->header
.offset_size
);
19644 if (cu
->header
.offset_size
== 4)
19645 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19647 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19648 if (str_offset
>= str_section
->size
)
19649 error (_("Offset from %s pointing outside of"
19650 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19651 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19652 return (const char *) (str_section
->buffer
+ str_offset
);
19655 /* Return the length of an LEB128 number in BUF. */
19658 leb128_size (const gdb_byte
*buf
)
19660 const gdb_byte
*begin
= buf
;
19666 if ((byte
& 128) == 0)
19667 return buf
- begin
;
19672 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19681 cu
->language
= language_c
;
19684 case DW_LANG_C_plus_plus
:
19685 case DW_LANG_C_plus_plus_11
:
19686 case DW_LANG_C_plus_plus_14
:
19687 cu
->language
= language_cplus
;
19690 cu
->language
= language_d
;
19692 case DW_LANG_Fortran77
:
19693 case DW_LANG_Fortran90
:
19694 case DW_LANG_Fortran95
:
19695 case DW_LANG_Fortran03
:
19696 case DW_LANG_Fortran08
:
19697 cu
->language
= language_fortran
;
19700 cu
->language
= language_go
;
19702 case DW_LANG_Mips_Assembler
:
19703 cu
->language
= language_asm
;
19705 case DW_LANG_Ada83
:
19706 case DW_LANG_Ada95
:
19707 cu
->language
= language_ada
;
19709 case DW_LANG_Modula2
:
19710 cu
->language
= language_m2
;
19712 case DW_LANG_Pascal83
:
19713 cu
->language
= language_pascal
;
19716 cu
->language
= language_objc
;
19719 case DW_LANG_Rust_old
:
19720 cu
->language
= language_rust
;
19722 case DW_LANG_Cobol74
:
19723 case DW_LANG_Cobol85
:
19725 cu
->language
= language_minimal
;
19728 cu
->language_defn
= language_def (cu
->language
);
19731 /* Return the named attribute or NULL if not there. */
19733 static struct attribute
*
19734 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19739 struct attribute
*spec
= NULL
;
19741 for (i
= 0; i
< die
->num_attrs
; ++i
)
19743 if (die
->attrs
[i
].name
== name
)
19744 return &die
->attrs
[i
];
19745 if (die
->attrs
[i
].name
== DW_AT_specification
19746 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19747 spec
= &die
->attrs
[i
];
19753 die
= follow_die_ref (die
, spec
, &cu
);
19759 /* Return the named attribute or NULL if not there,
19760 but do not follow DW_AT_specification, etc.
19761 This is for use in contexts where we're reading .debug_types dies.
19762 Following DW_AT_specification, DW_AT_abstract_origin will take us
19763 back up the chain, and we want to go down. */
19765 static struct attribute
*
19766 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
19770 for (i
= 0; i
< die
->num_attrs
; ++i
)
19771 if (die
->attrs
[i
].name
== name
)
19772 return &die
->attrs
[i
];
19777 /* Return the string associated with a string-typed attribute, or NULL if it
19778 is either not found or is of an incorrect type. */
19780 static const char *
19781 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19783 struct attribute
*attr
;
19784 const char *str
= NULL
;
19786 attr
= dwarf2_attr (die
, name
, cu
);
19790 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
19791 || attr
->form
== DW_FORM_string
19792 || attr
->form
== DW_FORM_GNU_str_index
19793 || attr
->form
== DW_FORM_GNU_strp_alt
)
19794 str
= DW_STRING (attr
);
19796 complaint (_("string type expected for attribute %s for "
19797 "DIE at %s in module %s"),
19798 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
19799 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
19805 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19806 and holds a non-zero value. This function should only be used for
19807 DW_FORM_flag or DW_FORM_flag_present attributes. */
19810 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19812 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19814 return (attr
&& DW_UNSND (attr
));
19818 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19820 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19821 which value is non-zero. However, we have to be careful with
19822 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19823 (via dwarf2_flag_true_p) follows this attribute. So we may
19824 end up accidently finding a declaration attribute that belongs
19825 to a different DIE referenced by the specification attribute,
19826 even though the given DIE does not have a declaration attribute. */
19827 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19828 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19831 /* Return the die giving the specification for DIE, if there is
19832 one. *SPEC_CU is the CU containing DIE on input, and the CU
19833 containing the return value on output. If there is no
19834 specification, but there is an abstract origin, that is
19837 static struct die_info
*
19838 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19840 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19843 if (spec_attr
== NULL
)
19844 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19846 if (spec_attr
== NULL
)
19849 return follow_die_ref (die
, spec_attr
, spec_cu
);
19852 /* Stub for free_line_header to match void * callback types. */
19855 free_line_header_voidp (void *arg
)
19857 struct line_header
*lh
= (struct line_header
*) arg
;
19863 line_header::add_include_dir (const char *include_dir
)
19865 if (dwarf_line_debug
>= 2)
19866 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
19867 include_dirs
.size () + 1, include_dir
);
19869 include_dirs
.push_back (include_dir
);
19873 line_header::add_file_name (const char *name
,
19875 unsigned int mod_time
,
19876 unsigned int length
)
19878 if (dwarf_line_debug
>= 2)
19879 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
19880 (unsigned) file_names
.size () + 1, name
);
19882 file_names
.emplace_back (name
, d_index
, mod_time
, length
);
19885 /* A convenience function to find the proper .debug_line section for a CU. */
19887 static struct dwarf2_section_info
*
19888 get_debug_line_section (struct dwarf2_cu
*cu
)
19890 struct dwarf2_section_info
*section
;
19891 struct dwarf2_per_objfile
*dwarf2_per_objfile
19892 = cu
->per_cu
->dwarf2_per_objfile
;
19894 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
19896 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19897 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
19898 else if (cu
->per_cu
->is_dwz
)
19900 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19902 section
= &dwz
->line
;
19905 section
= &dwarf2_per_objfile
->line
;
19910 /* Read directory or file name entry format, starting with byte of
19911 format count entries, ULEB128 pairs of entry formats, ULEB128 of
19912 entries count and the entries themselves in the described entry
19916 read_formatted_entries (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19917 bfd
*abfd
, const gdb_byte
**bufp
,
19918 struct line_header
*lh
,
19919 const struct comp_unit_head
*cu_header
,
19920 void (*callback
) (struct line_header
*lh
,
19923 unsigned int mod_time
,
19924 unsigned int length
))
19926 gdb_byte format_count
, formati
;
19927 ULONGEST data_count
, datai
;
19928 const gdb_byte
*buf
= *bufp
;
19929 const gdb_byte
*format_header_data
;
19930 unsigned int bytes_read
;
19932 format_count
= read_1_byte (abfd
, buf
);
19934 format_header_data
= buf
;
19935 for (formati
= 0; formati
< format_count
; formati
++)
19937 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
19939 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
19943 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
19945 for (datai
= 0; datai
< data_count
; datai
++)
19947 const gdb_byte
*format
= format_header_data
;
19948 struct file_entry fe
;
19950 for (formati
= 0; formati
< format_count
; formati
++)
19952 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
19953 format
+= bytes_read
;
19955 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
19956 format
+= bytes_read
;
19958 gdb::optional
<const char *> string
;
19959 gdb::optional
<unsigned int> uint
;
19963 case DW_FORM_string
:
19964 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
19968 case DW_FORM_line_strp
:
19969 string
.emplace (read_indirect_line_string (dwarf2_per_objfile
,
19976 case DW_FORM_data1
:
19977 uint
.emplace (read_1_byte (abfd
, buf
));
19981 case DW_FORM_data2
:
19982 uint
.emplace (read_2_bytes (abfd
, buf
));
19986 case DW_FORM_data4
:
19987 uint
.emplace (read_4_bytes (abfd
, buf
));
19991 case DW_FORM_data8
:
19992 uint
.emplace (read_8_bytes (abfd
, buf
));
19996 case DW_FORM_udata
:
19997 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
20001 case DW_FORM_block
:
20002 /* It is valid only for DW_LNCT_timestamp which is ignored by
20007 switch (content_type
)
20010 if (string
.has_value ())
20013 case DW_LNCT_directory_index
:
20014 if (uint
.has_value ())
20015 fe
.d_index
= (dir_index
) *uint
;
20017 case DW_LNCT_timestamp
:
20018 if (uint
.has_value ())
20019 fe
.mod_time
= *uint
;
20022 if (uint
.has_value ())
20028 complaint (_("Unknown format content type %s"),
20029 pulongest (content_type
));
20033 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
20039 /* Read the statement program header starting at OFFSET in
20040 .debug_line, or .debug_line.dwo. Return a pointer
20041 to a struct line_header, allocated using xmalloc.
20042 Returns NULL if there is a problem reading the header, e.g., if it
20043 has a version we don't understand.
20045 NOTE: the strings in the include directory and file name tables of
20046 the returned object point into the dwarf line section buffer,
20047 and must not be freed. */
20049 static line_header_up
20050 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
20052 const gdb_byte
*line_ptr
;
20053 unsigned int bytes_read
, offset_size
;
20055 const char *cur_dir
, *cur_file
;
20056 struct dwarf2_section_info
*section
;
20058 struct dwarf2_per_objfile
*dwarf2_per_objfile
20059 = cu
->per_cu
->dwarf2_per_objfile
;
20061 section
= get_debug_line_section (cu
);
20062 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
20063 if (section
->buffer
== NULL
)
20065 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20066 complaint (_("missing .debug_line.dwo section"));
20068 complaint (_("missing .debug_line section"));
20072 /* We can't do this until we know the section is non-empty.
20073 Only then do we know we have such a section. */
20074 abfd
= get_section_bfd_owner (section
);
20076 /* Make sure that at least there's room for the total_length field.
20077 That could be 12 bytes long, but we're just going to fudge that. */
20078 if (to_underlying (sect_off
) + 4 >= section
->size
)
20080 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20084 line_header_up
lh (new line_header ());
20086 lh
->sect_off
= sect_off
;
20087 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
20089 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
20091 /* Read in the header. */
20093 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
20094 &bytes_read
, &offset_size
);
20095 line_ptr
+= bytes_read
;
20096 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
20098 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20101 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
20102 lh
->version
= read_2_bytes (abfd
, line_ptr
);
20104 if (lh
->version
> 5)
20106 /* This is a version we don't understand. The format could have
20107 changed in ways we don't handle properly so just punt. */
20108 complaint (_("unsupported version in .debug_line section"));
20111 if (lh
->version
>= 5)
20113 gdb_byte segment_selector_size
;
20115 /* Skip address size. */
20116 read_1_byte (abfd
, line_ptr
);
20119 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
20121 if (segment_selector_size
!= 0)
20123 complaint (_("unsupported segment selector size %u "
20124 "in .debug_line section"),
20125 segment_selector_size
);
20129 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
20130 line_ptr
+= offset_size
;
20131 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
20133 if (lh
->version
>= 4)
20135 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
20139 lh
->maximum_ops_per_instruction
= 1;
20141 if (lh
->maximum_ops_per_instruction
== 0)
20143 lh
->maximum_ops_per_instruction
= 1;
20144 complaint (_("invalid maximum_ops_per_instruction "
20145 "in `.debug_line' section"));
20148 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
20150 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
20152 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
20154 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
20156 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
20158 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
20159 for (i
= 1; i
< lh
->opcode_base
; ++i
)
20161 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
20165 if (lh
->version
>= 5)
20167 /* Read directory table. */
20168 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20170 [] (struct line_header
*lh
, const char *name
,
20171 dir_index d_index
, unsigned int mod_time
,
20172 unsigned int length
)
20174 lh
->add_include_dir (name
);
20177 /* Read file name table. */
20178 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20180 [] (struct line_header
*lh
, const char *name
,
20181 dir_index d_index
, unsigned int mod_time
,
20182 unsigned int length
)
20184 lh
->add_file_name (name
, d_index
, mod_time
, length
);
20189 /* Read directory table. */
20190 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20192 line_ptr
+= bytes_read
;
20193 lh
->add_include_dir (cur_dir
);
20195 line_ptr
+= bytes_read
;
20197 /* Read file name table. */
20198 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20200 unsigned int mod_time
, length
;
20203 line_ptr
+= bytes_read
;
20204 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20205 line_ptr
+= bytes_read
;
20206 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20207 line_ptr
+= bytes_read
;
20208 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20209 line_ptr
+= bytes_read
;
20211 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
20213 line_ptr
+= bytes_read
;
20215 lh
->statement_program_start
= line_ptr
;
20217 if (line_ptr
> (section
->buffer
+ section
->size
))
20218 complaint (_("line number info header doesn't "
20219 "fit in `.debug_line' section"));
20224 /* Subroutine of dwarf_decode_lines to simplify it.
20225 Return the file name of the psymtab for included file FILE_INDEX
20226 in line header LH of PST.
20227 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20228 If space for the result is malloc'd, *NAME_HOLDER will be set.
20229 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
20231 static const char *
20232 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
20233 const struct partial_symtab
*pst
,
20234 const char *comp_dir
,
20235 gdb::unique_xmalloc_ptr
<char> *name_holder
)
20237 const file_entry
&fe
= lh
->file_names
[file_index
];
20238 const char *include_name
= fe
.name
;
20239 const char *include_name_to_compare
= include_name
;
20240 const char *pst_filename
;
20243 const char *dir_name
= fe
.include_dir (lh
);
20245 gdb::unique_xmalloc_ptr
<char> hold_compare
;
20246 if (!IS_ABSOLUTE_PATH (include_name
)
20247 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
20249 /* Avoid creating a duplicate psymtab for PST.
20250 We do this by comparing INCLUDE_NAME and PST_FILENAME.
20251 Before we do the comparison, however, we need to account
20252 for DIR_NAME and COMP_DIR.
20253 First prepend dir_name (if non-NULL). If we still don't
20254 have an absolute path prepend comp_dir (if non-NULL).
20255 However, the directory we record in the include-file's
20256 psymtab does not contain COMP_DIR (to match the
20257 corresponding symtab(s)).
20262 bash$ gcc -g ./hello.c
20263 include_name = "hello.c"
20265 DW_AT_comp_dir = comp_dir = "/tmp"
20266 DW_AT_name = "./hello.c"
20270 if (dir_name
!= NULL
)
20272 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
20273 include_name
, (char *) NULL
));
20274 include_name
= name_holder
->get ();
20275 include_name_to_compare
= include_name
;
20277 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
20279 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
20280 include_name
, (char *) NULL
));
20281 include_name_to_compare
= hold_compare
.get ();
20285 pst_filename
= pst
->filename
;
20286 gdb::unique_xmalloc_ptr
<char> copied_name
;
20287 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
20289 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
20290 pst_filename
, (char *) NULL
));
20291 pst_filename
= copied_name
.get ();
20294 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
20298 return include_name
;
20301 /* State machine to track the state of the line number program. */
20303 class lnp_state_machine
20306 /* Initialize a machine state for the start of a line number
20308 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
20309 bool record_lines_p
);
20311 file_entry
*current_file ()
20313 /* lh->file_names is 0-based, but the file name numbers in the
20314 statement program are 1-based. */
20315 return m_line_header
->file_name_at (m_file
);
20318 /* Record the line in the state machine. END_SEQUENCE is true if
20319 we're processing the end of a sequence. */
20320 void record_line (bool end_sequence
);
20322 /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true
20323 nop-out rest of the lines in this sequence. */
20324 void check_line_address (struct dwarf2_cu
*cu
,
20325 const gdb_byte
*line_ptr
,
20326 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
20328 void handle_set_discriminator (unsigned int discriminator
)
20330 m_discriminator
= discriminator
;
20331 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
20334 /* Handle DW_LNE_set_address. */
20335 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
20338 address
+= baseaddr
;
20339 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
20342 /* Handle DW_LNS_advance_pc. */
20343 void handle_advance_pc (CORE_ADDR adjust
);
20345 /* Handle a special opcode. */
20346 void handle_special_opcode (unsigned char op_code
);
20348 /* Handle DW_LNS_advance_line. */
20349 void handle_advance_line (int line_delta
)
20351 advance_line (line_delta
);
20354 /* Handle DW_LNS_set_file. */
20355 void handle_set_file (file_name_index file
);
20357 /* Handle DW_LNS_negate_stmt. */
20358 void handle_negate_stmt ()
20360 m_is_stmt
= !m_is_stmt
;
20363 /* Handle DW_LNS_const_add_pc. */
20364 void handle_const_add_pc ();
20366 /* Handle DW_LNS_fixed_advance_pc. */
20367 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
20369 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20373 /* Handle DW_LNS_copy. */
20374 void handle_copy ()
20376 record_line (false);
20377 m_discriminator
= 0;
20380 /* Handle DW_LNE_end_sequence. */
20381 void handle_end_sequence ()
20383 m_currently_recording_lines
= true;
20387 /* Advance the line by LINE_DELTA. */
20388 void advance_line (int line_delta
)
20390 m_line
+= line_delta
;
20392 if (line_delta
!= 0)
20393 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20396 struct dwarf2_cu
*m_cu
;
20398 gdbarch
*m_gdbarch
;
20400 /* True if we're recording lines.
20401 Otherwise we're building partial symtabs and are just interested in
20402 finding include files mentioned by the line number program. */
20403 bool m_record_lines_p
;
20405 /* The line number header. */
20406 line_header
*m_line_header
;
20408 /* These are part of the standard DWARF line number state machine,
20409 and initialized according to the DWARF spec. */
20411 unsigned char m_op_index
= 0;
20412 /* The line table index (1-based) of the current file. */
20413 file_name_index m_file
= (file_name_index
) 1;
20414 unsigned int m_line
= 1;
20416 /* These are initialized in the constructor. */
20418 CORE_ADDR m_address
;
20420 unsigned int m_discriminator
;
20422 /* Additional bits of state we need to track. */
20424 /* The last file that we called dwarf2_start_subfile for.
20425 This is only used for TLLs. */
20426 unsigned int m_last_file
= 0;
20427 /* The last file a line number was recorded for. */
20428 struct subfile
*m_last_subfile
= NULL
;
20430 /* When true, record the lines we decode. */
20431 bool m_currently_recording_lines
= false;
20433 /* The last line number that was recorded, used to coalesce
20434 consecutive entries for the same line. This can happen, for
20435 example, when discriminators are present. PR 17276. */
20436 unsigned int m_last_line
= 0;
20437 bool m_line_has_non_zero_discriminator
= false;
20441 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
20443 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
20444 / m_line_header
->maximum_ops_per_instruction
)
20445 * m_line_header
->minimum_instruction_length
);
20446 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20447 m_op_index
= ((m_op_index
+ adjust
)
20448 % m_line_header
->maximum_ops_per_instruction
);
20452 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
20454 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
20455 CORE_ADDR addr_adj
= (((m_op_index
20456 + (adj_opcode
/ m_line_header
->line_range
))
20457 / m_line_header
->maximum_ops_per_instruction
)
20458 * m_line_header
->minimum_instruction_length
);
20459 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20460 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
20461 % m_line_header
->maximum_ops_per_instruction
);
20463 int line_delta
= (m_line_header
->line_base
20464 + (adj_opcode
% m_line_header
->line_range
));
20465 advance_line (line_delta
);
20466 record_line (false);
20467 m_discriminator
= 0;
20471 lnp_state_machine::handle_set_file (file_name_index file
)
20475 const file_entry
*fe
= current_file ();
20477 dwarf2_debug_line_missing_file_complaint ();
20478 else if (m_record_lines_p
)
20480 const char *dir
= fe
->include_dir (m_line_header
);
20482 m_last_subfile
= m_cu
->builder
->get_current_subfile ();
20483 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20484 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
20489 lnp_state_machine::handle_const_add_pc ()
20492 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
20495 = (((m_op_index
+ adjust
)
20496 / m_line_header
->maximum_ops_per_instruction
)
20497 * m_line_header
->minimum_instruction_length
);
20499 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20500 m_op_index
= ((m_op_index
+ adjust
)
20501 % m_line_header
->maximum_ops_per_instruction
);
20504 /* Return non-zero if we should add LINE to the line number table.
20505 LINE is the line to add, LAST_LINE is the last line that was added,
20506 LAST_SUBFILE is the subfile for LAST_LINE.
20507 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
20508 had a non-zero discriminator.
20510 We have to be careful in the presence of discriminators.
20511 E.g., for this line:
20513 for (i = 0; i < 100000; i++);
20515 clang can emit four line number entries for that one line,
20516 each with a different discriminator.
20517 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20519 However, we want gdb to coalesce all four entries into one.
20520 Otherwise the user could stepi into the middle of the line and
20521 gdb would get confused about whether the pc really was in the
20522 middle of the line.
20524 Things are further complicated by the fact that two consecutive
20525 line number entries for the same line is a heuristic used by gcc
20526 to denote the end of the prologue. So we can't just discard duplicate
20527 entries, we have to be selective about it. The heuristic we use is
20528 that we only collapse consecutive entries for the same line if at least
20529 one of those entries has a non-zero discriminator. PR 17276.
20531 Note: Addresses in the line number state machine can never go backwards
20532 within one sequence, thus this coalescing is ok. */
20535 dwarf_record_line_p (struct dwarf2_cu
*cu
,
20536 unsigned int line
, unsigned int last_line
,
20537 int line_has_non_zero_discriminator
,
20538 struct subfile
*last_subfile
)
20540 if (cu
->builder
->get_current_subfile () != last_subfile
)
20542 if (line
!= last_line
)
20544 /* Same line for the same file that we've seen already.
20545 As a last check, for pr 17276, only record the line if the line
20546 has never had a non-zero discriminator. */
20547 if (!line_has_non_zero_discriminator
)
20552 /* Use the CU's builder to record line number LINE beginning at
20553 address ADDRESS in the line table of subfile SUBFILE. */
20556 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20557 unsigned int line
, CORE_ADDR address
,
20558 struct dwarf2_cu
*cu
)
20560 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20562 if (dwarf_line_debug
)
20564 fprintf_unfiltered (gdb_stdlog
,
20565 "Recording line %u, file %s, address %s\n",
20566 line
, lbasename (subfile
->name
),
20567 paddress (gdbarch
, address
));
20571 cu
->builder
->record_line (subfile
, line
, addr
);
20574 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20575 Mark the end of a set of line number records.
20576 The arguments are the same as for dwarf_record_line_1.
20577 If SUBFILE is NULL the request is ignored. */
20580 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20581 CORE_ADDR address
, struct dwarf2_cu
*cu
)
20583 if (subfile
== NULL
)
20586 if (dwarf_line_debug
)
20588 fprintf_unfiltered (gdb_stdlog
,
20589 "Finishing current line, file %s, address %s\n",
20590 lbasename (subfile
->name
),
20591 paddress (gdbarch
, address
));
20594 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, cu
);
20598 lnp_state_machine::record_line (bool end_sequence
)
20600 if (dwarf_line_debug
)
20602 fprintf_unfiltered (gdb_stdlog
,
20603 "Processing actual line %u: file %u,"
20604 " address %s, is_stmt %u, discrim %u\n",
20605 m_line
, to_underlying (m_file
),
20606 paddress (m_gdbarch
, m_address
),
20607 m_is_stmt
, m_discriminator
);
20610 file_entry
*fe
= current_file ();
20613 dwarf2_debug_line_missing_file_complaint ();
20614 /* For now we ignore lines not starting on an instruction boundary.
20615 But not when processing end_sequence for compatibility with the
20616 previous version of the code. */
20617 else if (m_op_index
== 0 || end_sequence
)
20619 fe
->included_p
= 1;
20620 if (m_record_lines_p
&& m_is_stmt
)
20622 if (m_last_subfile
!= m_cu
->builder
->get_current_subfile ()
20625 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
20626 m_currently_recording_lines
? m_cu
: nullptr);
20631 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
20632 m_line_has_non_zero_discriminator
,
20635 dwarf_record_line_1 (m_gdbarch
,
20636 m_cu
->builder
->get_current_subfile (),
20638 m_currently_recording_lines
? m_cu
: nullptr);
20640 m_last_subfile
= m_cu
->builder
->get_current_subfile ();
20641 m_last_line
= m_line
;
20647 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
20648 line_header
*lh
, bool record_lines_p
)
20652 m_record_lines_p
= record_lines_p
;
20653 m_line_header
= lh
;
20655 m_currently_recording_lines
= true;
20657 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20658 was a line entry for it so that the backend has a chance to adjust it
20659 and also record it in case it needs it. This is currently used by MIPS
20660 code, cf. `mips_adjust_dwarf2_line'. */
20661 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20662 m_is_stmt
= lh
->default_is_stmt
;
20663 m_discriminator
= 0;
20667 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20668 const gdb_byte
*line_ptr
,
20669 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
20671 /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside
20672 the pc range of the CU. However, we restrict the test to only ADDRESS
20673 values of zero to preserve GDB's previous behaviour which is to handle
20674 the specific case of a function being GC'd by the linker. */
20676 if (address
== 0 && address
< unrelocated_lowpc
)
20678 /* This line table is for a function which has been
20679 GCd by the linker. Ignore it. PR gdb/12528 */
20681 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20682 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20684 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20685 line_offset
, objfile_name (objfile
));
20686 m_currently_recording_lines
= false;
20687 /* Note: m_currently_recording_lines is left as false until we see
20688 DW_LNE_end_sequence. */
20692 /* Subroutine of dwarf_decode_lines to simplify it.
20693 Process the line number information in LH.
20694 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20695 program in order to set included_p for every referenced header. */
20698 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20699 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20701 const gdb_byte
*line_ptr
, *extended_end
;
20702 const gdb_byte
*line_end
;
20703 unsigned int bytes_read
, extended_len
;
20704 unsigned char op_code
, extended_op
;
20705 CORE_ADDR baseaddr
;
20706 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20707 bfd
*abfd
= objfile
->obfd
;
20708 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
20709 /* True if we're recording line info (as opposed to building partial
20710 symtabs and just interested in finding include files mentioned by
20711 the line number program). */
20712 bool record_lines_p
= !decode_for_pst_p
;
20714 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
20716 line_ptr
= lh
->statement_program_start
;
20717 line_end
= lh
->statement_program_end
;
20719 /* Read the statement sequences until there's nothing left. */
20720 while (line_ptr
< line_end
)
20722 /* The DWARF line number program state machine. Reset the state
20723 machine at the start of each sequence. */
20724 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
20725 bool end_sequence
= false;
20727 if (record_lines_p
)
20729 /* Start a subfile for the current file of the state
20731 const file_entry
*fe
= state_machine
.current_file ();
20734 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
20737 /* Decode the table. */
20738 while (line_ptr
< line_end
&& !end_sequence
)
20740 op_code
= read_1_byte (abfd
, line_ptr
);
20743 if (op_code
>= lh
->opcode_base
)
20745 /* Special opcode. */
20746 state_machine
.handle_special_opcode (op_code
);
20748 else switch (op_code
)
20750 case DW_LNS_extended_op
:
20751 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
20753 line_ptr
+= bytes_read
;
20754 extended_end
= line_ptr
+ extended_len
;
20755 extended_op
= read_1_byte (abfd
, line_ptr
);
20757 switch (extended_op
)
20759 case DW_LNE_end_sequence
:
20760 state_machine
.handle_end_sequence ();
20761 end_sequence
= true;
20763 case DW_LNE_set_address
:
20766 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
20767 line_ptr
+= bytes_read
;
20769 state_machine
.check_line_address (cu
, line_ptr
,
20770 lowpc
- baseaddr
, address
);
20771 state_machine
.handle_set_address (baseaddr
, address
);
20774 case DW_LNE_define_file
:
20776 const char *cur_file
;
20777 unsigned int mod_time
, length
;
20780 cur_file
= read_direct_string (abfd
, line_ptr
,
20782 line_ptr
+= bytes_read
;
20783 dindex
= (dir_index
)
20784 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20785 line_ptr
+= bytes_read
;
20787 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20788 line_ptr
+= bytes_read
;
20790 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20791 line_ptr
+= bytes_read
;
20792 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
20795 case DW_LNE_set_discriminator
:
20797 /* The discriminator is not interesting to the
20798 debugger; just ignore it. We still need to
20799 check its value though:
20800 if there are consecutive entries for the same
20801 (non-prologue) line we want to coalesce them.
20804 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20805 line_ptr
+= bytes_read
;
20807 state_machine
.handle_set_discriminator (discr
);
20811 complaint (_("mangled .debug_line section"));
20814 /* Make sure that we parsed the extended op correctly. If e.g.
20815 we expected a different address size than the producer used,
20816 we may have read the wrong number of bytes. */
20817 if (line_ptr
!= extended_end
)
20819 complaint (_("mangled .debug_line section"));
20824 state_machine
.handle_copy ();
20826 case DW_LNS_advance_pc
:
20829 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20830 line_ptr
+= bytes_read
;
20832 state_machine
.handle_advance_pc (adjust
);
20835 case DW_LNS_advance_line
:
20838 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
20839 line_ptr
+= bytes_read
;
20841 state_machine
.handle_advance_line (line_delta
);
20844 case DW_LNS_set_file
:
20846 file_name_index file
20847 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
20849 line_ptr
+= bytes_read
;
20851 state_machine
.handle_set_file (file
);
20854 case DW_LNS_set_column
:
20855 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20856 line_ptr
+= bytes_read
;
20858 case DW_LNS_negate_stmt
:
20859 state_machine
.handle_negate_stmt ();
20861 case DW_LNS_set_basic_block
:
20863 /* Add to the address register of the state machine the
20864 address increment value corresponding to special opcode
20865 255. I.e., this value is scaled by the minimum
20866 instruction length since special opcode 255 would have
20867 scaled the increment. */
20868 case DW_LNS_const_add_pc
:
20869 state_machine
.handle_const_add_pc ();
20871 case DW_LNS_fixed_advance_pc
:
20873 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
20876 state_machine
.handle_fixed_advance_pc (addr_adj
);
20881 /* Unknown standard opcode, ignore it. */
20884 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
20886 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20887 line_ptr
+= bytes_read
;
20894 dwarf2_debug_line_missing_end_sequence_complaint ();
20896 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
20897 in which case we still finish recording the last line). */
20898 state_machine
.record_line (true);
20902 /* Decode the Line Number Program (LNP) for the given line_header
20903 structure and CU. The actual information extracted and the type
20904 of structures created from the LNP depends on the value of PST.
20906 1. If PST is NULL, then this procedure uses the data from the program
20907 to create all necessary symbol tables, and their linetables.
20909 2. If PST is not NULL, this procedure reads the program to determine
20910 the list of files included by the unit represented by PST, and
20911 builds all the associated partial symbol tables.
20913 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20914 It is used for relative paths in the line table.
20915 NOTE: When processing partial symtabs (pst != NULL),
20916 comp_dir == pst->dirname.
20918 NOTE: It is important that psymtabs have the same file name (via strcmp)
20919 as the corresponding symtab. Since COMP_DIR is not used in the name of the
20920 symtab we don't use it in the name of the psymtabs we create.
20921 E.g. expand_line_sal requires this when finding psymtabs to expand.
20922 A good testcase for this is mb-inline.exp.
20924 LOWPC is the lowest address in CU (or 0 if not known).
20926 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
20927 for its PC<->lines mapping information. Otherwise only the filename
20928 table is read in. */
20931 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
20932 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
20933 CORE_ADDR lowpc
, int decode_mapping
)
20935 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20936 const int decode_for_pst_p
= (pst
!= NULL
);
20938 if (decode_mapping
)
20939 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
20941 if (decode_for_pst_p
)
20945 /* Now that we're done scanning the Line Header Program, we can
20946 create the psymtab of each included file. */
20947 for (file_index
= 0; file_index
< lh
->file_names
.size (); file_index
++)
20948 if (lh
->file_names
[file_index
].included_p
== 1)
20950 gdb::unique_xmalloc_ptr
<char> name_holder
;
20951 const char *include_name
=
20952 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
,
20954 if (include_name
!= NULL
)
20955 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
20960 /* Make sure a symtab is created for every file, even files
20961 which contain only variables (i.e. no code with associated
20963 struct compunit_symtab
*cust
= cu
->builder
->get_compunit_symtab ();
20966 for (i
= 0; i
< lh
->file_names
.size (); i
++)
20968 file_entry
&fe
= lh
->file_names
[i
];
20970 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
20972 if (cu
->builder
->get_current_subfile ()->symtab
== NULL
)
20974 cu
->builder
->get_current_subfile ()->symtab
20975 = allocate_symtab (cust
,
20976 cu
->builder
->get_current_subfile ()->name
);
20978 fe
.symtab
= cu
->builder
->get_current_subfile ()->symtab
;
20983 /* Start a subfile for DWARF. FILENAME is the name of the file and
20984 DIRNAME the name of the source directory which contains FILENAME
20985 or NULL if not known.
20986 This routine tries to keep line numbers from identical absolute and
20987 relative file names in a common subfile.
20989 Using the `list' example from the GDB testsuite, which resides in
20990 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
20991 of /srcdir/list0.c yields the following debugging information for list0.c:
20993 DW_AT_name: /srcdir/list0.c
20994 DW_AT_comp_dir: /compdir
20995 files.files[0].name: list0.h
20996 files.files[0].dir: /srcdir
20997 files.files[1].name: list0.c
20998 files.files[1].dir: /srcdir
21000 The line number information for list0.c has to end up in a single
21001 subfile, so that `break /srcdir/list0.c:1' works as expected.
21002 start_subfile will ensure that this happens provided that we pass the
21003 concatenation of files.files[1].dir and files.files[1].name as the
21007 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
21008 const char *dirname
)
21012 /* In order not to lose the line information directory,
21013 we concatenate it to the filename when it makes sense.
21014 Note that the Dwarf3 standard says (speaking of filenames in line
21015 information): ``The directory index is ignored for file names
21016 that represent full path names''. Thus ignoring dirname in the
21017 `else' branch below isn't an issue. */
21019 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
21021 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
21025 cu
->builder
->start_subfile (filename
);
21031 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
21032 buildsym_compunit constructor. */
21034 static struct compunit_symtab
*
21035 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
21036 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
21038 gdb_assert (cu
->builder
== nullptr);
21040 cu
->builder
.reset (new struct buildsym_compunit
21041 (cu
->per_cu
->dwarf2_per_objfile
->objfile
,
21042 name
, comp_dir
, cu
->language
, low_pc
));
21044 cu
->list_in_scope
= cu
->builder
->get_file_symbols ();
21046 cu
->builder
->record_debugformat ("DWARF 2");
21047 cu
->builder
->record_producer (cu
->producer
);
21049 cu
->processing_has_namespace_info
= 0;
21051 return cu
->builder
->get_compunit_symtab ();
21055 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
21056 struct dwarf2_cu
*cu
)
21058 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21059 struct comp_unit_head
*cu_header
= &cu
->header
;
21061 /* NOTE drow/2003-01-30: There used to be a comment and some special
21062 code here to turn a symbol with DW_AT_external and a
21063 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
21064 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
21065 with some versions of binutils) where shared libraries could have
21066 relocations against symbols in their debug information - the
21067 minimal symbol would have the right address, but the debug info
21068 would not. It's no longer necessary, because we will explicitly
21069 apply relocations when we read in the debug information now. */
21071 /* A DW_AT_location attribute with no contents indicates that a
21072 variable has been optimized away. */
21073 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
21075 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21079 /* Handle one degenerate form of location expression specially, to
21080 preserve GDB's previous behavior when section offsets are
21081 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
21082 then mark this symbol as LOC_STATIC. */
21084 if (attr_form_is_block (attr
)
21085 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
21086 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
21087 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
21088 && (DW_BLOCK (attr
)->size
21089 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
21091 unsigned int dummy
;
21093 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
21094 SYMBOL_VALUE_ADDRESS (sym
) =
21095 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
21097 SYMBOL_VALUE_ADDRESS (sym
) =
21098 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
21099 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
21100 fixup_symbol_section (sym
, objfile
);
21101 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
21102 SYMBOL_SECTION (sym
));
21106 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
21107 expression evaluator, and use LOC_COMPUTED only when necessary
21108 (i.e. when the value of a register or memory location is
21109 referenced, or a thread-local block, etc.). Then again, it might
21110 not be worthwhile. I'm assuming that it isn't unless performance
21111 or memory numbers show me otherwise. */
21113 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
21115 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
21116 cu
->has_loclist
= 1;
21119 /* Given a pointer to a DWARF information entry, figure out if we need
21120 to make a symbol table entry for it, and if so, create a new entry
21121 and return a pointer to it.
21122 If TYPE is NULL, determine symbol type from the die, otherwise
21123 used the passed type.
21124 If SPACE is not NULL, use it to hold the new symbol. If it is
21125 NULL, allocate a new symbol on the objfile's obstack. */
21127 static struct symbol
*
21128 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
21129 struct symbol
*space
)
21131 struct dwarf2_per_objfile
*dwarf2_per_objfile
21132 = cu
->per_cu
->dwarf2_per_objfile
;
21133 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21134 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21135 struct symbol
*sym
= NULL
;
21137 struct attribute
*attr
= NULL
;
21138 struct attribute
*attr2
= NULL
;
21139 CORE_ADDR baseaddr
;
21140 struct pending
**list_to_add
= NULL
;
21142 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
21144 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21146 name
= dwarf2_name (die
, cu
);
21149 const char *linkagename
;
21150 int suppress_add
= 0;
21155 sym
= allocate_symbol (objfile
);
21156 OBJSTAT (objfile
, n_syms
++);
21158 /* Cache this symbol's name and the name's demangled form (if any). */
21159 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
21160 linkagename
= dwarf2_physname (name
, die
, cu
);
21161 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
21163 /* Fortran does not have mangling standard and the mangling does differ
21164 between gfortran, iFort etc. */
21165 if (cu
->language
== language_fortran
21166 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
21167 symbol_set_demangled_name (&(sym
->ginfo
),
21168 dwarf2_full_name (name
, die
, cu
),
21171 /* Default assumptions.
21172 Use the passed type or decode it from the die. */
21173 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21174 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21176 SYMBOL_TYPE (sym
) = type
;
21178 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
21179 attr
= dwarf2_attr (die
,
21180 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
21184 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
21187 attr
= dwarf2_attr (die
,
21188 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
21192 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
21193 struct file_entry
*fe
;
21195 if (cu
->line_header
!= NULL
)
21196 fe
= cu
->line_header
->file_name_at (file_index
);
21201 complaint (_("file index out of range"));
21203 symbol_set_symtab (sym
, fe
->symtab
);
21209 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
21214 addr
= attr_value_as_address (attr
);
21215 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
21216 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
21218 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
21219 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
21220 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
21221 add_symbol_to_list (sym
, cu
->list_in_scope
);
21223 case DW_TAG_subprogram
:
21224 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21226 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21227 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21228 if ((attr2
&& (DW_UNSND (attr2
) != 0))
21229 || cu
->language
== language_ada
)
21231 /* Subprograms marked external are stored as a global symbol.
21232 Ada subprograms, whether marked external or not, are always
21233 stored as a global symbol, because we want to be able to
21234 access them globally. For instance, we want to be able
21235 to break on a nested subprogram without having to
21236 specify the context. */
21237 list_to_add
= cu
->builder
->get_global_symbols ();
21241 list_to_add
= cu
->list_in_scope
;
21244 case DW_TAG_inlined_subroutine
:
21245 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21247 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21248 SYMBOL_INLINED (sym
) = 1;
21249 list_to_add
= cu
->list_in_scope
;
21251 case DW_TAG_template_value_param
:
21253 /* Fall through. */
21254 case DW_TAG_constant
:
21255 case DW_TAG_variable
:
21256 case DW_TAG_member
:
21257 /* Compilation with minimal debug info may result in
21258 variables with missing type entries. Change the
21259 misleading `void' type to something sensible. */
21260 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
21261 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
21263 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21264 /* In the case of DW_TAG_member, we should only be called for
21265 static const members. */
21266 if (die
->tag
== DW_TAG_member
)
21268 /* dwarf2_add_field uses die_is_declaration,
21269 so we do the same. */
21270 gdb_assert (die_is_declaration (die
, cu
));
21275 dwarf2_const_value (attr
, sym
, cu
);
21276 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21279 if (attr2
&& (DW_UNSND (attr2
) != 0))
21280 list_to_add
= cu
->builder
->get_global_symbols ();
21282 list_to_add
= cu
->list_in_scope
;
21286 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21289 var_decode_location (attr
, sym
, cu
);
21290 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21292 /* Fortran explicitly imports any global symbols to the local
21293 scope by DW_TAG_common_block. */
21294 if (cu
->language
== language_fortran
&& die
->parent
21295 && die
->parent
->tag
== DW_TAG_common_block
)
21298 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21299 && SYMBOL_VALUE_ADDRESS (sym
) == 0
21300 && !dwarf2_per_objfile
->has_section_at_zero
)
21302 /* When a static variable is eliminated by the linker,
21303 the corresponding debug information is not stripped
21304 out, but the variable address is set to null;
21305 do not add such variables into symbol table. */
21307 else if (attr2
&& (DW_UNSND (attr2
) != 0))
21309 /* Workaround gfortran PR debug/40040 - it uses
21310 DW_AT_location for variables in -fPIC libraries which may
21311 get overriden by other libraries/executable and get
21312 a different address. Resolve it by the minimal symbol
21313 which may come from inferior's executable using copy
21314 relocation. Make this workaround only for gfortran as for
21315 other compilers GDB cannot guess the minimal symbol
21316 Fortran mangling kind. */
21317 if (cu
->language
== language_fortran
&& die
->parent
21318 && die
->parent
->tag
== DW_TAG_module
21320 && startswith (cu
->producer
, "GNU Fortran"))
21321 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21323 /* A variable with DW_AT_external is never static,
21324 but it may be block-scoped. */
21326 = (cu
->list_in_scope
== cu
->builder
->get_file_symbols ()
21327 ? cu
->builder
->get_global_symbols ()
21328 : cu
->list_in_scope
);
21331 list_to_add
= cu
->list_in_scope
;
21335 /* We do not know the address of this symbol.
21336 If it is an external symbol and we have type information
21337 for it, enter the symbol as a LOC_UNRESOLVED symbol.
21338 The address of the variable will then be determined from
21339 the minimal symbol table whenever the variable is
21341 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21343 /* Fortran explicitly imports any global symbols to the local
21344 scope by DW_TAG_common_block. */
21345 if (cu
->language
== language_fortran
&& die
->parent
21346 && die
->parent
->tag
== DW_TAG_common_block
)
21348 /* SYMBOL_CLASS doesn't matter here because
21349 read_common_block is going to reset it. */
21351 list_to_add
= cu
->list_in_scope
;
21353 else if (attr2
&& (DW_UNSND (attr2
) != 0)
21354 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
21356 /* A variable with DW_AT_external is never static, but it
21357 may be block-scoped. */
21359 = (cu
->list_in_scope
== cu
->builder
->get_file_symbols ()
21360 ? cu
->builder
->get_global_symbols ()
21361 : cu
->list_in_scope
);
21363 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21365 else if (!die_is_declaration (die
, cu
))
21367 /* Use the default LOC_OPTIMIZED_OUT class. */
21368 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
21370 list_to_add
= cu
->list_in_scope
;
21374 case DW_TAG_formal_parameter
:
21376 /* If we are inside a function, mark this as an argument. If
21377 not, we might be looking at an argument to an inlined function
21378 when we do not have enough information to show inlined frames;
21379 pretend it's a local variable in that case so that the user can
21381 struct context_stack
*curr
21382 = cu
->builder
->get_current_context_stack ();
21383 if (curr
!= nullptr && curr
->name
!= nullptr)
21384 SYMBOL_IS_ARGUMENT (sym
) = 1;
21385 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21388 var_decode_location (attr
, sym
, cu
);
21390 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21393 dwarf2_const_value (attr
, sym
, cu
);
21396 list_to_add
= cu
->list_in_scope
;
21399 case DW_TAG_unspecified_parameters
:
21400 /* From varargs functions; gdb doesn't seem to have any
21401 interest in this information, so just ignore it for now.
21404 case DW_TAG_template_type_param
:
21406 /* Fall through. */
21407 case DW_TAG_class_type
:
21408 case DW_TAG_interface_type
:
21409 case DW_TAG_structure_type
:
21410 case DW_TAG_union_type
:
21411 case DW_TAG_set_type
:
21412 case DW_TAG_enumeration_type
:
21413 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21414 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
21417 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
21418 really ever be static objects: otherwise, if you try
21419 to, say, break of a class's method and you're in a file
21420 which doesn't mention that class, it won't work unless
21421 the check for all static symbols in lookup_symbol_aux
21422 saves you. See the OtherFileClass tests in
21423 gdb.c++/namespace.exp. */
21428 = (cu
->list_in_scope
== cu
->builder
->get_file_symbols ()
21429 && cu
->language
== language_cplus
21430 ? cu
->builder
->get_global_symbols ()
21431 : cu
->list_in_scope
);
21433 /* The semantics of C++ state that "struct foo {
21434 ... }" also defines a typedef for "foo". */
21435 if (cu
->language
== language_cplus
21436 || cu
->language
== language_ada
21437 || cu
->language
== language_d
21438 || cu
->language
== language_rust
)
21440 /* The symbol's name is already allocated along
21441 with this objfile, so we don't need to
21442 duplicate it for the type. */
21443 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
21444 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
21449 case DW_TAG_typedef
:
21450 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21451 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21452 list_to_add
= cu
->list_in_scope
;
21454 case DW_TAG_base_type
:
21455 case DW_TAG_subrange_type
:
21456 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21457 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21458 list_to_add
= cu
->list_in_scope
;
21460 case DW_TAG_enumerator
:
21461 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21464 dwarf2_const_value (attr
, sym
, cu
);
21467 /* NOTE: carlton/2003-11-10: See comment above in the
21468 DW_TAG_class_type, etc. block. */
21471 = (cu
->list_in_scope
== cu
->builder
->get_file_symbols ()
21472 && cu
->language
== language_cplus
21473 ? cu
->builder
->get_global_symbols ()
21474 : cu
->list_in_scope
);
21477 case DW_TAG_imported_declaration
:
21478 case DW_TAG_namespace
:
21479 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21480 list_to_add
= cu
->builder
->get_global_symbols ();
21482 case DW_TAG_module
:
21483 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21484 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
21485 list_to_add
= cu
->builder
->get_global_symbols ();
21487 case DW_TAG_common_block
:
21488 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
21489 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
21490 add_symbol_to_list (sym
, cu
->list_in_scope
);
21493 /* Not a tag we recognize. Hopefully we aren't processing
21494 trash data, but since we must specifically ignore things
21495 we don't recognize, there is nothing else we should do at
21497 complaint (_("unsupported tag: '%s'"),
21498 dwarf_tag_name (die
->tag
));
21504 sym
->hash_next
= objfile
->template_symbols
;
21505 objfile
->template_symbols
= sym
;
21506 list_to_add
= NULL
;
21509 if (list_to_add
!= NULL
)
21510 add_symbol_to_list (sym
, list_to_add
);
21512 /* For the benefit of old versions of GCC, check for anonymous
21513 namespaces based on the demangled name. */
21514 if (!cu
->processing_has_namespace_info
21515 && cu
->language
== language_cplus
)
21516 cp_scan_for_anonymous_namespaces (cu
->builder
.get (), sym
, objfile
);
21521 /* Given an attr with a DW_FORM_dataN value in host byte order,
21522 zero-extend it as appropriate for the symbol's type. The DWARF
21523 standard (v4) is not entirely clear about the meaning of using
21524 DW_FORM_dataN for a constant with a signed type, where the type is
21525 wider than the data. The conclusion of a discussion on the DWARF
21526 list was that this is unspecified. We choose to always zero-extend
21527 because that is the interpretation long in use by GCC. */
21530 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21531 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21533 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21534 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21535 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21536 LONGEST l
= DW_UNSND (attr
);
21538 if (bits
< sizeof (*value
) * 8)
21540 l
&= ((LONGEST
) 1 << bits
) - 1;
21543 else if (bits
== sizeof (*value
) * 8)
21547 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21548 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21555 /* Read a constant value from an attribute. Either set *VALUE, or if
21556 the value does not fit in *VALUE, set *BYTES - either already
21557 allocated on the objfile obstack, or newly allocated on OBSTACK,
21558 or, set *BATON, if we translated the constant to a location
21562 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21563 const char *name
, struct obstack
*obstack
,
21564 struct dwarf2_cu
*cu
,
21565 LONGEST
*value
, const gdb_byte
**bytes
,
21566 struct dwarf2_locexpr_baton
**baton
)
21568 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21569 struct comp_unit_head
*cu_header
= &cu
->header
;
21570 struct dwarf_block
*blk
;
21571 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21572 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21578 switch (attr
->form
)
21581 case DW_FORM_GNU_addr_index
:
21585 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21586 dwarf2_const_value_length_mismatch_complaint (name
,
21587 cu_header
->addr_size
,
21588 TYPE_LENGTH (type
));
21589 /* Symbols of this form are reasonably rare, so we just
21590 piggyback on the existing location code rather than writing
21591 a new implementation of symbol_computed_ops. */
21592 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21593 (*baton
)->per_cu
= cu
->per_cu
;
21594 gdb_assert ((*baton
)->per_cu
);
21596 (*baton
)->size
= 2 + cu_header
->addr_size
;
21597 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21598 (*baton
)->data
= data
;
21600 data
[0] = DW_OP_addr
;
21601 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21602 byte_order
, DW_ADDR (attr
));
21603 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21606 case DW_FORM_string
:
21608 case DW_FORM_GNU_str_index
:
21609 case DW_FORM_GNU_strp_alt
:
21610 /* DW_STRING is already allocated on the objfile obstack, point
21612 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21614 case DW_FORM_block1
:
21615 case DW_FORM_block2
:
21616 case DW_FORM_block4
:
21617 case DW_FORM_block
:
21618 case DW_FORM_exprloc
:
21619 case DW_FORM_data16
:
21620 blk
= DW_BLOCK (attr
);
21621 if (TYPE_LENGTH (type
) != blk
->size
)
21622 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21623 TYPE_LENGTH (type
));
21624 *bytes
= blk
->data
;
21627 /* The DW_AT_const_value attributes are supposed to carry the
21628 symbol's value "represented as it would be on the target
21629 architecture." By the time we get here, it's already been
21630 converted to host endianness, so we just need to sign- or
21631 zero-extend it as appropriate. */
21632 case DW_FORM_data1
:
21633 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21635 case DW_FORM_data2
:
21636 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21638 case DW_FORM_data4
:
21639 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21641 case DW_FORM_data8
:
21642 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21645 case DW_FORM_sdata
:
21646 case DW_FORM_implicit_const
:
21647 *value
= DW_SND (attr
);
21650 case DW_FORM_udata
:
21651 *value
= DW_UNSND (attr
);
21655 complaint (_("unsupported const value attribute form: '%s'"),
21656 dwarf_form_name (attr
->form
));
21663 /* Copy constant value from an attribute to a symbol. */
21666 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21667 struct dwarf2_cu
*cu
)
21669 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21671 const gdb_byte
*bytes
;
21672 struct dwarf2_locexpr_baton
*baton
;
21674 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21675 SYMBOL_PRINT_NAME (sym
),
21676 &objfile
->objfile_obstack
, cu
,
21677 &value
, &bytes
, &baton
);
21681 SYMBOL_LOCATION_BATON (sym
) = baton
;
21682 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21684 else if (bytes
!= NULL
)
21686 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21687 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21691 SYMBOL_VALUE (sym
) = value
;
21692 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21696 /* Return the type of the die in question using its DW_AT_type attribute. */
21698 static struct type
*
21699 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21701 struct attribute
*type_attr
;
21703 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21706 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21707 /* A missing DW_AT_type represents a void type. */
21708 return objfile_type (objfile
)->builtin_void
;
21711 return lookup_die_type (die
, type_attr
, cu
);
21714 /* True iff CU's producer generates GNAT Ada auxiliary information
21715 that allows to find parallel types through that information instead
21716 of having to do expensive parallel lookups by type name. */
21719 need_gnat_info (struct dwarf2_cu
*cu
)
21721 /* Assume that the Ada compiler was GNAT, which always produces
21722 the auxiliary information. */
21723 return (cu
->language
== language_ada
);
21726 /* Return the auxiliary type of the die in question using its
21727 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
21728 attribute is not present. */
21730 static struct type
*
21731 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21733 struct attribute
*type_attr
;
21735 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
21739 return lookup_die_type (die
, type_attr
, cu
);
21742 /* If DIE has a descriptive_type attribute, then set the TYPE's
21743 descriptive type accordingly. */
21746 set_descriptive_type (struct type
*type
, struct die_info
*die
,
21747 struct dwarf2_cu
*cu
)
21749 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
21751 if (descriptive_type
)
21753 ALLOCATE_GNAT_AUX_TYPE (type
);
21754 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
21758 /* Return the containing type of the die in question using its
21759 DW_AT_containing_type attribute. */
21761 static struct type
*
21762 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21764 struct attribute
*type_attr
;
21765 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21767 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
21769 error (_("Dwarf Error: Problem turning containing type into gdb type "
21770 "[in module %s]"), objfile_name (objfile
));
21772 return lookup_die_type (die
, type_attr
, cu
);
21775 /* Return an error marker type to use for the ill formed type in DIE/CU. */
21777 static struct type
*
21778 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
21780 struct dwarf2_per_objfile
*dwarf2_per_objfile
21781 = cu
->per_cu
->dwarf2_per_objfile
;
21782 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21783 char *message
, *saved
;
21785 message
= xstrprintf (_("<unknown type in %s, CU %s, DIE %s>"),
21786 objfile_name (objfile
),
21787 sect_offset_str (cu
->header
.sect_off
),
21788 sect_offset_str (die
->sect_off
));
21789 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
21790 message
, strlen (message
));
21793 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
21796 /* Look up the type of DIE in CU using its type attribute ATTR.
21797 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
21798 DW_AT_containing_type.
21799 If there is no type substitute an error marker. */
21801 static struct type
*
21802 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
21803 struct dwarf2_cu
*cu
)
21805 struct dwarf2_per_objfile
*dwarf2_per_objfile
21806 = cu
->per_cu
->dwarf2_per_objfile
;
21807 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21808 struct type
*this_type
;
21810 gdb_assert (attr
->name
== DW_AT_type
21811 || attr
->name
== DW_AT_GNAT_descriptive_type
21812 || attr
->name
== DW_AT_containing_type
);
21814 /* First see if we have it cached. */
21816 if (attr
->form
== DW_FORM_GNU_ref_alt
)
21818 struct dwarf2_per_cu_data
*per_cu
;
21819 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21821 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
21822 dwarf2_per_objfile
);
21823 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
21825 else if (attr_form_is_ref (attr
))
21827 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21829 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
21831 else if (attr
->form
== DW_FORM_ref_sig8
)
21833 ULONGEST signature
= DW_SIGNATURE (attr
);
21835 return get_signatured_type (die
, signature
, cu
);
21839 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
21840 " at %s [in module %s]"),
21841 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
21842 objfile_name (objfile
));
21843 return build_error_marker_type (cu
, die
);
21846 /* If not cached we need to read it in. */
21848 if (this_type
== NULL
)
21850 struct die_info
*type_die
= NULL
;
21851 struct dwarf2_cu
*type_cu
= cu
;
21853 if (attr_form_is_ref (attr
))
21854 type_die
= follow_die_ref (die
, attr
, &type_cu
);
21855 if (type_die
== NULL
)
21856 return build_error_marker_type (cu
, die
);
21857 /* If we find the type now, it's probably because the type came
21858 from an inter-CU reference and the type's CU got expanded before
21860 this_type
= read_type_die (type_die
, type_cu
);
21863 /* If we still don't have a type use an error marker. */
21865 if (this_type
== NULL
)
21866 return build_error_marker_type (cu
, die
);
21871 /* Return the type in DIE, CU.
21872 Returns NULL for invalid types.
21874 This first does a lookup in die_type_hash,
21875 and only reads the die in if necessary.
21877 NOTE: This can be called when reading in partial or full symbols. */
21879 static struct type
*
21880 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
21882 struct type
*this_type
;
21884 this_type
= get_die_type (die
, cu
);
21888 return read_type_die_1 (die
, cu
);
21891 /* Read the type in DIE, CU.
21892 Returns NULL for invalid types. */
21894 static struct type
*
21895 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
21897 struct type
*this_type
= NULL
;
21901 case DW_TAG_class_type
:
21902 case DW_TAG_interface_type
:
21903 case DW_TAG_structure_type
:
21904 case DW_TAG_union_type
:
21905 this_type
= read_structure_type (die
, cu
);
21907 case DW_TAG_enumeration_type
:
21908 this_type
= read_enumeration_type (die
, cu
);
21910 case DW_TAG_subprogram
:
21911 case DW_TAG_subroutine_type
:
21912 case DW_TAG_inlined_subroutine
:
21913 this_type
= read_subroutine_type (die
, cu
);
21915 case DW_TAG_array_type
:
21916 this_type
= read_array_type (die
, cu
);
21918 case DW_TAG_set_type
:
21919 this_type
= read_set_type (die
, cu
);
21921 case DW_TAG_pointer_type
:
21922 this_type
= read_tag_pointer_type (die
, cu
);
21924 case DW_TAG_ptr_to_member_type
:
21925 this_type
= read_tag_ptr_to_member_type (die
, cu
);
21927 case DW_TAG_reference_type
:
21928 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
21930 case DW_TAG_rvalue_reference_type
:
21931 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
21933 case DW_TAG_const_type
:
21934 this_type
= read_tag_const_type (die
, cu
);
21936 case DW_TAG_volatile_type
:
21937 this_type
= read_tag_volatile_type (die
, cu
);
21939 case DW_TAG_restrict_type
:
21940 this_type
= read_tag_restrict_type (die
, cu
);
21942 case DW_TAG_string_type
:
21943 this_type
= read_tag_string_type (die
, cu
);
21945 case DW_TAG_typedef
:
21946 this_type
= read_typedef (die
, cu
);
21948 case DW_TAG_subrange_type
:
21949 this_type
= read_subrange_type (die
, cu
);
21951 case DW_TAG_base_type
:
21952 this_type
= read_base_type (die
, cu
);
21954 case DW_TAG_unspecified_type
:
21955 this_type
= read_unspecified_type (die
, cu
);
21957 case DW_TAG_namespace
:
21958 this_type
= read_namespace_type (die
, cu
);
21960 case DW_TAG_module
:
21961 this_type
= read_module_type (die
, cu
);
21963 case DW_TAG_atomic_type
:
21964 this_type
= read_tag_atomic_type (die
, cu
);
21967 complaint (_("unexpected tag in read_type_die: '%s'"),
21968 dwarf_tag_name (die
->tag
));
21975 /* See if we can figure out if the class lives in a namespace. We do
21976 this by looking for a member function; its demangled name will
21977 contain namespace info, if there is any.
21978 Return the computed name or NULL.
21979 Space for the result is allocated on the objfile's obstack.
21980 This is the full-die version of guess_partial_die_structure_name.
21981 In this case we know DIE has no useful parent. */
21984 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21986 struct die_info
*spec_die
;
21987 struct dwarf2_cu
*spec_cu
;
21988 struct die_info
*child
;
21989 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21992 spec_die
= die_specification (die
, &spec_cu
);
21993 if (spec_die
!= NULL
)
21999 for (child
= die
->child
;
22001 child
= child
->sibling
)
22003 if (child
->tag
== DW_TAG_subprogram
)
22005 const char *linkage_name
= dw2_linkage_name (child
, cu
);
22007 if (linkage_name
!= NULL
)
22010 = language_class_name_from_physname (cu
->language_defn
,
22014 if (actual_name
!= NULL
)
22016 const char *die_name
= dwarf2_name (die
, cu
);
22018 if (die_name
!= NULL
22019 && strcmp (die_name
, actual_name
) != 0)
22021 /* Strip off the class name from the full name.
22022 We want the prefix. */
22023 int die_name_len
= strlen (die_name
);
22024 int actual_name_len
= strlen (actual_name
);
22026 /* Test for '::' as a sanity check. */
22027 if (actual_name_len
> die_name_len
+ 2
22028 && actual_name
[actual_name_len
22029 - die_name_len
- 1] == ':')
22030 name
= (char *) obstack_copy0 (
22031 &objfile
->per_bfd
->storage_obstack
,
22032 actual_name
, actual_name_len
- die_name_len
- 2);
22035 xfree (actual_name
);
22044 /* GCC might emit a nameless typedef that has a linkage name. Determine the
22045 prefix part in such case. See
22046 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22048 static const char *
22049 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22051 struct attribute
*attr
;
22054 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
22055 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
22058 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
22061 attr
= dw2_linkage_name_attr (die
, cu
);
22062 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22065 /* dwarf2_name had to be already called. */
22066 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
22068 /* Strip the base name, keep any leading namespaces/classes. */
22069 base
= strrchr (DW_STRING (attr
), ':');
22070 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
22073 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22074 return (char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22076 &base
[-1] - DW_STRING (attr
));
22079 /* Return the name of the namespace/class that DIE is defined within,
22080 or "" if we can't tell. The caller should not xfree the result.
22082 For example, if we're within the method foo() in the following
22092 then determine_prefix on foo's die will return "N::C". */
22094 static const char *
22095 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22097 struct dwarf2_per_objfile
*dwarf2_per_objfile
22098 = cu
->per_cu
->dwarf2_per_objfile
;
22099 struct die_info
*parent
, *spec_die
;
22100 struct dwarf2_cu
*spec_cu
;
22101 struct type
*parent_type
;
22102 const char *retval
;
22104 if (cu
->language
!= language_cplus
22105 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
22106 && cu
->language
!= language_rust
)
22109 retval
= anonymous_struct_prefix (die
, cu
);
22113 /* We have to be careful in the presence of DW_AT_specification.
22114 For example, with GCC 3.4, given the code
22118 // Definition of N::foo.
22122 then we'll have a tree of DIEs like this:
22124 1: DW_TAG_compile_unit
22125 2: DW_TAG_namespace // N
22126 3: DW_TAG_subprogram // declaration of N::foo
22127 4: DW_TAG_subprogram // definition of N::foo
22128 DW_AT_specification // refers to die #3
22130 Thus, when processing die #4, we have to pretend that we're in
22131 the context of its DW_AT_specification, namely the contex of die
22134 spec_die
= die_specification (die
, &spec_cu
);
22135 if (spec_die
== NULL
)
22136 parent
= die
->parent
;
22139 parent
= spec_die
->parent
;
22143 if (parent
== NULL
)
22145 else if (parent
->building_fullname
)
22148 const char *parent_name
;
22150 /* It has been seen on RealView 2.2 built binaries,
22151 DW_TAG_template_type_param types actually _defined_ as
22152 children of the parent class:
22155 template class <class Enum> Class{};
22156 Class<enum E> class_e;
22158 1: DW_TAG_class_type (Class)
22159 2: DW_TAG_enumeration_type (E)
22160 3: DW_TAG_enumerator (enum1:0)
22161 3: DW_TAG_enumerator (enum2:1)
22163 2: DW_TAG_template_type_param
22164 DW_AT_type DW_FORM_ref_udata (E)
22166 Besides being broken debug info, it can put GDB into an
22167 infinite loop. Consider:
22169 When we're building the full name for Class<E>, we'll start
22170 at Class, and go look over its template type parameters,
22171 finding E. We'll then try to build the full name of E, and
22172 reach here. We're now trying to build the full name of E,
22173 and look over the parent DIE for containing scope. In the
22174 broken case, if we followed the parent DIE of E, we'd again
22175 find Class, and once again go look at its template type
22176 arguments, etc., etc. Simply don't consider such parent die
22177 as source-level parent of this die (it can't be, the language
22178 doesn't allow it), and break the loop here. */
22179 name
= dwarf2_name (die
, cu
);
22180 parent_name
= dwarf2_name (parent
, cu
);
22181 complaint (_("template param type '%s' defined within parent '%s'"),
22182 name
? name
: "<unknown>",
22183 parent_name
? parent_name
: "<unknown>");
22187 switch (parent
->tag
)
22189 case DW_TAG_namespace
:
22190 parent_type
= read_type_die (parent
, cu
);
22191 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
22192 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
22193 Work around this problem here. */
22194 if (cu
->language
== language_cplus
22195 && strcmp (TYPE_NAME (parent_type
), "::") == 0)
22197 /* We give a name to even anonymous namespaces. */
22198 return TYPE_NAME (parent_type
);
22199 case DW_TAG_class_type
:
22200 case DW_TAG_interface_type
:
22201 case DW_TAG_structure_type
:
22202 case DW_TAG_union_type
:
22203 case DW_TAG_module
:
22204 parent_type
= read_type_die (parent
, cu
);
22205 if (TYPE_NAME (parent_type
) != NULL
)
22206 return TYPE_NAME (parent_type
);
22208 /* An anonymous structure is only allowed non-static data
22209 members; no typedefs, no member functions, et cetera.
22210 So it does not need a prefix. */
22212 case DW_TAG_compile_unit
:
22213 case DW_TAG_partial_unit
:
22214 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
22215 if (cu
->language
== language_cplus
22216 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
22217 && die
->child
!= NULL
22218 && (die
->tag
== DW_TAG_class_type
22219 || die
->tag
== DW_TAG_structure_type
22220 || die
->tag
== DW_TAG_union_type
))
22222 char *name
= guess_full_die_structure_name (die
, cu
);
22227 case DW_TAG_enumeration_type
:
22228 parent_type
= read_type_die (parent
, cu
);
22229 if (TYPE_DECLARED_CLASS (parent_type
))
22231 if (TYPE_NAME (parent_type
) != NULL
)
22232 return TYPE_NAME (parent_type
);
22235 /* Fall through. */
22237 return determine_prefix (parent
, cu
);
22241 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
22242 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
22243 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
22244 an obconcat, otherwise allocate storage for the result. The CU argument is
22245 used to determine the language and hence, the appropriate separator. */
22247 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
22250 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
22251 int physname
, struct dwarf2_cu
*cu
)
22253 const char *lead
= "";
22256 if (suffix
== NULL
|| suffix
[0] == '\0'
22257 || prefix
== NULL
|| prefix
[0] == '\0')
22259 else if (cu
->language
== language_d
)
22261 /* For D, the 'main' function could be defined in any module, but it
22262 should never be prefixed. */
22263 if (strcmp (suffix
, "D main") == 0)
22271 else if (cu
->language
== language_fortran
&& physname
)
22273 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
22274 DW_AT_MIPS_linkage_name is preferred and used instead. */
22282 if (prefix
== NULL
)
22284 if (suffix
== NULL
)
22291 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
22293 strcpy (retval
, lead
);
22294 strcat (retval
, prefix
);
22295 strcat (retval
, sep
);
22296 strcat (retval
, suffix
);
22301 /* We have an obstack. */
22302 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
22306 /* Return sibling of die, NULL if no sibling. */
22308 static struct die_info
*
22309 sibling_die (struct die_info
*die
)
22311 return die
->sibling
;
22314 /* Get name of a die, return NULL if not found. */
22316 static const char *
22317 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
22318 struct obstack
*obstack
)
22320 if (name
&& cu
->language
== language_cplus
)
22322 std::string canon_name
= cp_canonicalize_string (name
);
22324 if (!canon_name
.empty ())
22326 if (canon_name
!= name
)
22327 name
= (const char *) obstack_copy0 (obstack
,
22328 canon_name
.c_str (),
22329 canon_name
.length ());
22336 /* Get name of a die, return NULL if not found.
22337 Anonymous namespaces are converted to their magic string. */
22339 static const char *
22340 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22342 struct attribute
*attr
;
22343 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22345 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
22346 if ((!attr
|| !DW_STRING (attr
))
22347 && die
->tag
!= DW_TAG_namespace
22348 && die
->tag
!= DW_TAG_class_type
22349 && die
->tag
!= DW_TAG_interface_type
22350 && die
->tag
!= DW_TAG_structure_type
22351 && die
->tag
!= DW_TAG_union_type
)
22356 case DW_TAG_compile_unit
:
22357 case DW_TAG_partial_unit
:
22358 /* Compilation units have a DW_AT_name that is a filename, not
22359 a source language identifier. */
22360 case DW_TAG_enumeration_type
:
22361 case DW_TAG_enumerator
:
22362 /* These tags always have simple identifiers already; no need
22363 to canonicalize them. */
22364 return DW_STRING (attr
);
22366 case DW_TAG_namespace
:
22367 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
22368 return DW_STRING (attr
);
22369 return CP_ANONYMOUS_NAMESPACE_STR
;
22371 case DW_TAG_class_type
:
22372 case DW_TAG_interface_type
:
22373 case DW_TAG_structure_type
:
22374 case DW_TAG_union_type
:
22375 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
22376 structures or unions. These were of the form "._%d" in GCC 4.1,
22377 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
22378 and GCC 4.4. We work around this problem by ignoring these. */
22379 if (attr
&& DW_STRING (attr
)
22380 && (startswith (DW_STRING (attr
), "._")
22381 || startswith (DW_STRING (attr
), "<anonymous")))
22384 /* GCC might emit a nameless typedef that has a linkage name. See
22385 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22386 if (!attr
|| DW_STRING (attr
) == NULL
)
22388 char *demangled
= NULL
;
22390 attr
= dw2_linkage_name_attr (die
, cu
);
22391 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22394 /* Avoid demangling DW_STRING (attr) the second time on a second
22395 call for the same DIE. */
22396 if (!DW_STRING_IS_CANONICAL (attr
))
22397 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
22403 /* FIXME: we already did this for the partial symbol... */
22406 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22407 demangled
, strlen (demangled
)));
22408 DW_STRING_IS_CANONICAL (attr
) = 1;
22411 /* Strip any leading namespaces/classes, keep only the base name.
22412 DW_AT_name for named DIEs does not contain the prefixes. */
22413 base
= strrchr (DW_STRING (attr
), ':');
22414 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
22417 return DW_STRING (attr
);
22426 if (!DW_STRING_IS_CANONICAL (attr
))
22429 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
22430 &objfile
->per_bfd
->storage_obstack
);
22431 DW_STRING_IS_CANONICAL (attr
) = 1;
22433 return DW_STRING (attr
);
22436 /* Return the die that this die in an extension of, or NULL if there
22437 is none. *EXT_CU is the CU containing DIE on input, and the CU
22438 containing the return value on output. */
22440 static struct die_info
*
22441 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
22443 struct attribute
*attr
;
22445 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
22449 return follow_die_ref (die
, attr
, ext_cu
);
22452 /* Convert a DIE tag into its string name. */
22454 static const char *
22455 dwarf_tag_name (unsigned tag
)
22457 const char *name
= get_DW_TAG_name (tag
);
22460 return "DW_TAG_<unknown>";
22465 /* Convert a DWARF attribute code into its string name. */
22467 static const char *
22468 dwarf_attr_name (unsigned attr
)
22472 #ifdef MIPS /* collides with DW_AT_HP_block_index */
22473 if (attr
== DW_AT_MIPS_fde
)
22474 return "DW_AT_MIPS_fde";
22476 if (attr
== DW_AT_HP_block_index
)
22477 return "DW_AT_HP_block_index";
22480 name
= get_DW_AT_name (attr
);
22483 return "DW_AT_<unknown>";
22488 /* Convert a DWARF value form code into its string name. */
22490 static const char *
22491 dwarf_form_name (unsigned form
)
22493 const char *name
= get_DW_FORM_name (form
);
22496 return "DW_FORM_<unknown>";
22501 static const char *
22502 dwarf_bool_name (unsigned mybool
)
22510 /* Convert a DWARF type code into its string name. */
22512 static const char *
22513 dwarf_type_encoding_name (unsigned enc
)
22515 const char *name
= get_DW_ATE_name (enc
);
22518 return "DW_ATE_<unknown>";
22524 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
22528 print_spaces (indent
, f
);
22529 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
22530 dwarf_tag_name (die
->tag
), die
->abbrev
,
22531 sect_offset_str (die
->sect_off
));
22533 if (die
->parent
!= NULL
)
22535 print_spaces (indent
, f
);
22536 fprintf_unfiltered (f
, " parent at offset: %s\n",
22537 sect_offset_str (die
->parent
->sect_off
));
22540 print_spaces (indent
, f
);
22541 fprintf_unfiltered (f
, " has children: %s\n",
22542 dwarf_bool_name (die
->child
!= NULL
));
22544 print_spaces (indent
, f
);
22545 fprintf_unfiltered (f
, " attributes:\n");
22547 for (i
= 0; i
< die
->num_attrs
; ++i
)
22549 print_spaces (indent
, f
);
22550 fprintf_unfiltered (f
, " %s (%s) ",
22551 dwarf_attr_name (die
->attrs
[i
].name
),
22552 dwarf_form_name (die
->attrs
[i
].form
));
22554 switch (die
->attrs
[i
].form
)
22557 case DW_FORM_GNU_addr_index
:
22558 fprintf_unfiltered (f
, "address: ");
22559 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
22561 case DW_FORM_block2
:
22562 case DW_FORM_block4
:
22563 case DW_FORM_block
:
22564 case DW_FORM_block1
:
22565 fprintf_unfiltered (f
, "block: size %s",
22566 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22568 case DW_FORM_exprloc
:
22569 fprintf_unfiltered (f
, "expression: size %s",
22570 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22572 case DW_FORM_data16
:
22573 fprintf_unfiltered (f
, "constant of 16 bytes");
22575 case DW_FORM_ref_addr
:
22576 fprintf_unfiltered (f
, "ref address: ");
22577 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22579 case DW_FORM_GNU_ref_alt
:
22580 fprintf_unfiltered (f
, "alt ref address: ");
22581 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22587 case DW_FORM_ref_udata
:
22588 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
22589 (long) (DW_UNSND (&die
->attrs
[i
])));
22591 case DW_FORM_data1
:
22592 case DW_FORM_data2
:
22593 case DW_FORM_data4
:
22594 case DW_FORM_data8
:
22595 case DW_FORM_udata
:
22596 case DW_FORM_sdata
:
22597 fprintf_unfiltered (f
, "constant: %s",
22598 pulongest (DW_UNSND (&die
->attrs
[i
])));
22600 case DW_FORM_sec_offset
:
22601 fprintf_unfiltered (f
, "section offset: %s",
22602 pulongest (DW_UNSND (&die
->attrs
[i
])));
22604 case DW_FORM_ref_sig8
:
22605 fprintf_unfiltered (f
, "signature: %s",
22606 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
22608 case DW_FORM_string
:
22610 case DW_FORM_line_strp
:
22611 case DW_FORM_GNU_str_index
:
22612 case DW_FORM_GNU_strp_alt
:
22613 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22614 DW_STRING (&die
->attrs
[i
])
22615 ? DW_STRING (&die
->attrs
[i
]) : "",
22616 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
22619 if (DW_UNSND (&die
->attrs
[i
]))
22620 fprintf_unfiltered (f
, "flag: TRUE");
22622 fprintf_unfiltered (f
, "flag: FALSE");
22624 case DW_FORM_flag_present
:
22625 fprintf_unfiltered (f
, "flag: TRUE");
22627 case DW_FORM_indirect
:
22628 /* The reader will have reduced the indirect form to
22629 the "base form" so this form should not occur. */
22630 fprintf_unfiltered (f
,
22631 "unexpected attribute form: DW_FORM_indirect");
22633 case DW_FORM_implicit_const
:
22634 fprintf_unfiltered (f
, "constant: %s",
22635 plongest (DW_SND (&die
->attrs
[i
])));
22638 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
22639 die
->attrs
[i
].form
);
22642 fprintf_unfiltered (f
, "\n");
22647 dump_die_for_error (struct die_info
*die
)
22649 dump_die_shallow (gdb_stderr
, 0, die
);
22653 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
22655 int indent
= level
* 4;
22657 gdb_assert (die
!= NULL
);
22659 if (level
>= max_level
)
22662 dump_die_shallow (f
, indent
, die
);
22664 if (die
->child
!= NULL
)
22666 print_spaces (indent
, f
);
22667 fprintf_unfiltered (f
, " Children:");
22668 if (level
+ 1 < max_level
)
22670 fprintf_unfiltered (f
, "\n");
22671 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22675 fprintf_unfiltered (f
,
22676 " [not printed, max nesting level reached]\n");
22680 if (die
->sibling
!= NULL
&& level
> 0)
22682 dump_die_1 (f
, level
, max_level
, die
->sibling
);
22686 /* This is called from the pdie macro in gdbinit.in.
22687 It's not static so gcc will keep a copy callable from gdb. */
22690 dump_die (struct die_info
*die
, int max_level
)
22692 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
22696 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
22700 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
22701 to_underlying (die
->sect_off
),
22707 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
22711 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
22713 if (attr_form_is_ref (attr
))
22714 return (sect_offset
) DW_UNSND (attr
);
22716 complaint (_("unsupported die ref attribute form: '%s'"),
22717 dwarf_form_name (attr
->form
));
22721 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
22722 * the value held by the attribute is not constant. */
22725 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
22727 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
22728 return DW_SND (attr
);
22729 else if (attr
->form
== DW_FORM_udata
22730 || attr
->form
== DW_FORM_data1
22731 || attr
->form
== DW_FORM_data2
22732 || attr
->form
== DW_FORM_data4
22733 || attr
->form
== DW_FORM_data8
)
22734 return DW_UNSND (attr
);
22737 /* For DW_FORM_data16 see attr_form_is_constant. */
22738 complaint (_("Attribute value is not a constant (%s)"),
22739 dwarf_form_name (attr
->form
));
22740 return default_value
;
22744 /* Follow reference or signature attribute ATTR of SRC_DIE.
22745 On entry *REF_CU is the CU of SRC_DIE.
22746 On exit *REF_CU is the CU of the result. */
22748 static struct die_info
*
22749 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22750 struct dwarf2_cu
**ref_cu
)
22752 struct die_info
*die
;
22754 if (attr_form_is_ref (attr
))
22755 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22756 else if (attr
->form
== DW_FORM_ref_sig8
)
22757 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22760 dump_die_for_error (src_die
);
22761 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22762 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22768 /* Follow reference OFFSET.
22769 On entry *REF_CU is the CU of the source die referencing OFFSET.
22770 On exit *REF_CU is the CU of the result.
22771 Returns NULL if OFFSET is invalid. */
22773 static struct die_info
*
22774 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22775 struct dwarf2_cu
**ref_cu
)
22777 struct die_info temp_die
;
22778 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22779 struct dwarf2_per_objfile
*dwarf2_per_objfile
22780 = cu
->per_cu
->dwarf2_per_objfile
;
22782 gdb_assert (cu
->per_cu
!= NULL
);
22786 if (cu
->per_cu
->is_debug_types
)
22788 /* .debug_types CUs cannot reference anything outside their CU.
22789 If they need to, they have to reference a signatured type via
22790 DW_FORM_ref_sig8. */
22791 if (!offset_in_cu_p (&cu
->header
, sect_off
))
22794 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22795 || !offset_in_cu_p (&cu
->header
, sect_off
))
22797 struct dwarf2_per_cu_data
*per_cu
;
22799 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22800 dwarf2_per_objfile
);
22802 /* If necessary, add it to the queue and load its DIEs. */
22803 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
22804 load_full_comp_unit (per_cu
, false, cu
->language
);
22806 target_cu
= per_cu
->cu
;
22808 else if (cu
->dies
== NULL
)
22810 /* We're loading full DIEs during partial symbol reading. */
22811 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
22812 load_full_comp_unit (cu
->per_cu
, false, language_minimal
);
22815 *ref_cu
= target_cu
;
22816 temp_die
.sect_off
= sect_off
;
22817 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22819 to_underlying (sect_off
));
22822 /* Follow reference attribute ATTR of SRC_DIE.
22823 On entry *REF_CU is the CU of SRC_DIE.
22824 On exit *REF_CU is the CU of the result. */
22826 static struct die_info
*
22827 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22828 struct dwarf2_cu
**ref_cu
)
22830 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22831 struct dwarf2_cu
*cu
= *ref_cu
;
22832 struct die_info
*die
;
22834 die
= follow_die_offset (sect_off
,
22835 (attr
->form
== DW_FORM_GNU_ref_alt
22836 || cu
->per_cu
->is_dwz
),
22839 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
22840 "at %s [in module %s]"),
22841 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
22842 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
22847 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
22848 Returned value is intended for DW_OP_call*. Returned
22849 dwarf2_locexpr_baton->data has lifetime of
22850 PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */
22852 struct dwarf2_locexpr_baton
22853 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
22854 struct dwarf2_per_cu_data
*per_cu
,
22855 CORE_ADDR (*get_frame_pc
) (void *baton
),
22858 struct dwarf2_cu
*cu
;
22859 struct die_info
*die
;
22860 struct attribute
*attr
;
22861 struct dwarf2_locexpr_baton retval
;
22862 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
22863 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22865 if (per_cu
->cu
== NULL
)
22866 load_cu (per_cu
, false);
22870 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22871 Instead just throw an error, not much else we can do. */
22872 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22873 sect_offset_str (sect_off
), objfile_name (objfile
));
22876 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22878 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22879 sect_offset_str (sect_off
), objfile_name (objfile
));
22881 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22884 /* DWARF: "If there is no such attribute, then there is no effect.".
22885 DATA is ignored if SIZE is 0. */
22887 retval
.data
= NULL
;
22890 else if (attr_form_is_section_offset (attr
))
22892 struct dwarf2_loclist_baton loclist_baton
;
22893 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22896 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
22898 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
22900 retval
.size
= size
;
22904 if (!attr_form_is_block (attr
))
22905 error (_("Dwarf Error: DIE at %s referenced in module %s "
22906 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
22907 sect_offset_str (sect_off
), objfile_name (objfile
));
22909 retval
.data
= DW_BLOCK (attr
)->data
;
22910 retval
.size
= DW_BLOCK (attr
)->size
;
22912 retval
.per_cu
= cu
->per_cu
;
22914 age_cached_comp_units (dwarf2_per_objfile
);
22919 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
22922 struct dwarf2_locexpr_baton
22923 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
22924 struct dwarf2_per_cu_data
*per_cu
,
22925 CORE_ADDR (*get_frame_pc
) (void *baton
),
22928 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
22930 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
22933 /* Write a constant of a given type as target-ordered bytes into
22936 static const gdb_byte
*
22937 write_constant_as_bytes (struct obstack
*obstack
,
22938 enum bfd_endian byte_order
,
22945 *len
= TYPE_LENGTH (type
);
22946 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22947 store_unsigned_integer (result
, *len
, byte_order
, value
);
22952 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
22953 pointer to the constant bytes and set LEN to the length of the
22954 data. If memory is needed, allocate it on OBSTACK. If the DIE
22955 does not have a DW_AT_const_value, return NULL. */
22958 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
22959 struct dwarf2_per_cu_data
*per_cu
,
22960 struct obstack
*obstack
,
22963 struct dwarf2_cu
*cu
;
22964 struct die_info
*die
;
22965 struct attribute
*attr
;
22966 const gdb_byte
*result
= NULL
;
22969 enum bfd_endian byte_order
;
22970 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
22972 if (per_cu
->cu
== NULL
)
22973 load_cu (per_cu
, false);
22977 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22978 Instead just throw an error, not much else we can do. */
22979 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22980 sect_offset_str (sect_off
), objfile_name (objfile
));
22983 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22985 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22986 sect_offset_str (sect_off
), objfile_name (objfile
));
22988 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
22992 byte_order
= (bfd_big_endian (objfile
->obfd
)
22993 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
22995 switch (attr
->form
)
22998 case DW_FORM_GNU_addr_index
:
23002 *len
= cu
->header
.addr_size
;
23003 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23004 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
23008 case DW_FORM_string
:
23010 case DW_FORM_GNU_str_index
:
23011 case DW_FORM_GNU_strp_alt
:
23012 /* DW_STRING is already allocated on the objfile obstack, point
23014 result
= (const gdb_byte
*) DW_STRING (attr
);
23015 *len
= strlen (DW_STRING (attr
));
23017 case DW_FORM_block1
:
23018 case DW_FORM_block2
:
23019 case DW_FORM_block4
:
23020 case DW_FORM_block
:
23021 case DW_FORM_exprloc
:
23022 case DW_FORM_data16
:
23023 result
= DW_BLOCK (attr
)->data
;
23024 *len
= DW_BLOCK (attr
)->size
;
23027 /* The DW_AT_const_value attributes are supposed to carry the
23028 symbol's value "represented as it would be on the target
23029 architecture." By the time we get here, it's already been
23030 converted to host endianness, so we just need to sign- or
23031 zero-extend it as appropriate. */
23032 case DW_FORM_data1
:
23033 type
= die_type (die
, cu
);
23034 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
23035 if (result
== NULL
)
23036 result
= write_constant_as_bytes (obstack
, byte_order
,
23039 case DW_FORM_data2
:
23040 type
= die_type (die
, cu
);
23041 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
23042 if (result
== NULL
)
23043 result
= write_constant_as_bytes (obstack
, byte_order
,
23046 case DW_FORM_data4
:
23047 type
= die_type (die
, cu
);
23048 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
23049 if (result
== NULL
)
23050 result
= write_constant_as_bytes (obstack
, byte_order
,
23053 case DW_FORM_data8
:
23054 type
= die_type (die
, cu
);
23055 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
23056 if (result
== NULL
)
23057 result
= write_constant_as_bytes (obstack
, byte_order
,
23061 case DW_FORM_sdata
:
23062 case DW_FORM_implicit_const
:
23063 type
= die_type (die
, cu
);
23064 result
= write_constant_as_bytes (obstack
, byte_order
,
23065 type
, DW_SND (attr
), len
);
23068 case DW_FORM_udata
:
23069 type
= die_type (die
, cu
);
23070 result
= write_constant_as_bytes (obstack
, byte_order
,
23071 type
, DW_UNSND (attr
), len
);
23075 complaint (_("unsupported const value attribute form: '%s'"),
23076 dwarf_form_name (attr
->form
));
23083 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
23084 valid type for this die is found. */
23087 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
23088 struct dwarf2_per_cu_data
*per_cu
)
23090 struct dwarf2_cu
*cu
;
23091 struct die_info
*die
;
23093 if (per_cu
->cu
== NULL
)
23094 load_cu (per_cu
, false);
23099 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23103 return die_type (die
, cu
);
23106 /* Return the type of the DIE at DIE_OFFSET in the CU named by
23110 dwarf2_get_die_type (cu_offset die_offset
,
23111 struct dwarf2_per_cu_data
*per_cu
)
23113 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
23114 return get_die_type_at_offset (die_offset_sect
, per_cu
);
23117 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
23118 On entry *REF_CU is the CU of SRC_DIE.
23119 On exit *REF_CU is the CU of the result.
23120 Returns NULL if the referenced DIE isn't found. */
23122 static struct die_info
*
23123 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
23124 struct dwarf2_cu
**ref_cu
)
23126 struct die_info temp_die
;
23127 struct dwarf2_cu
*sig_cu
;
23128 struct die_info
*die
;
23130 /* While it might be nice to assert sig_type->type == NULL here,
23131 we can get here for DW_AT_imported_declaration where we need
23132 the DIE not the type. */
23134 /* If necessary, add it to the queue and load its DIEs. */
23136 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
23137 read_signatured_type (sig_type
);
23139 sig_cu
= sig_type
->per_cu
.cu
;
23140 gdb_assert (sig_cu
!= NULL
);
23141 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
23142 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
23143 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
23144 to_underlying (temp_die
.sect_off
));
23147 struct dwarf2_per_objfile
*dwarf2_per_objfile
23148 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
23150 /* For .gdb_index version 7 keep track of included TUs.
23151 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
23152 if (dwarf2_per_objfile
->index_table
!= NULL
23153 && dwarf2_per_objfile
->index_table
->version
<= 7)
23155 VEC_safe_push (dwarf2_per_cu_ptr
,
23156 (*ref_cu
)->per_cu
->imported_symtabs
,
23167 /* Follow signatured type referenced by ATTR in SRC_DIE.
23168 On entry *REF_CU is the CU of SRC_DIE.
23169 On exit *REF_CU is the CU of the result.
23170 The result is the DIE of the type.
23171 If the referenced type cannot be found an error is thrown. */
23173 static struct die_info
*
23174 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23175 struct dwarf2_cu
**ref_cu
)
23177 ULONGEST signature
= DW_SIGNATURE (attr
);
23178 struct signatured_type
*sig_type
;
23179 struct die_info
*die
;
23181 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
23183 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
23184 /* sig_type will be NULL if the signatured type is missing from
23186 if (sig_type
== NULL
)
23188 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23189 " from DIE at %s [in module %s]"),
23190 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23191 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23194 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
23197 dump_die_for_error (src_die
);
23198 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23199 " from DIE at %s [in module %s]"),
23200 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23201 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23207 /* Get the type specified by SIGNATURE referenced in DIE/CU,
23208 reading in and processing the type unit if necessary. */
23210 static struct type
*
23211 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
23212 struct dwarf2_cu
*cu
)
23214 struct dwarf2_per_objfile
*dwarf2_per_objfile
23215 = cu
->per_cu
->dwarf2_per_objfile
;
23216 struct signatured_type
*sig_type
;
23217 struct dwarf2_cu
*type_cu
;
23218 struct die_info
*type_die
;
23221 sig_type
= lookup_signatured_type (cu
, signature
);
23222 /* sig_type will be NULL if the signatured type is missing from
23224 if (sig_type
== NULL
)
23226 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23227 " from DIE at %s [in module %s]"),
23228 hex_string (signature
), sect_offset_str (die
->sect_off
),
23229 objfile_name (dwarf2_per_objfile
->objfile
));
23230 return build_error_marker_type (cu
, die
);
23233 /* If we already know the type we're done. */
23234 if (sig_type
->type
!= NULL
)
23235 return sig_type
->type
;
23238 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
23239 if (type_die
!= NULL
)
23241 /* N.B. We need to call get_die_type to ensure only one type for this DIE
23242 is created. This is important, for example, because for c++ classes
23243 we need TYPE_NAME set which is only done by new_symbol. Blech. */
23244 type
= read_type_die (type_die
, type_cu
);
23247 complaint (_("Dwarf Error: Cannot build signatured type %s"
23248 " referenced from DIE at %s [in module %s]"),
23249 hex_string (signature
), sect_offset_str (die
->sect_off
),
23250 objfile_name (dwarf2_per_objfile
->objfile
));
23251 type
= build_error_marker_type (cu
, die
);
23256 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23257 " from DIE at %s [in module %s]"),
23258 hex_string (signature
), sect_offset_str (die
->sect_off
),
23259 objfile_name (dwarf2_per_objfile
->objfile
));
23260 type
= build_error_marker_type (cu
, die
);
23262 sig_type
->type
= type
;
23267 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
23268 reading in and processing the type unit if necessary. */
23270 static struct type
*
23271 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
23272 struct dwarf2_cu
*cu
) /* ARI: editCase function */
23274 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
23275 if (attr_form_is_ref (attr
))
23277 struct dwarf2_cu
*type_cu
= cu
;
23278 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
23280 return read_type_die (type_die
, type_cu
);
23282 else if (attr
->form
== DW_FORM_ref_sig8
)
23284 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
23288 struct dwarf2_per_objfile
*dwarf2_per_objfile
23289 = cu
->per_cu
->dwarf2_per_objfile
;
23291 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
23292 " at %s [in module %s]"),
23293 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
23294 objfile_name (dwarf2_per_objfile
->objfile
));
23295 return build_error_marker_type (cu
, die
);
23299 /* Load the DIEs associated with type unit PER_CU into memory. */
23302 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
23304 struct signatured_type
*sig_type
;
23306 /* Caller is responsible for ensuring type_unit_groups don't get here. */
23307 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
23309 /* We have the per_cu, but we need the signatured_type.
23310 Fortunately this is an easy translation. */
23311 gdb_assert (per_cu
->is_debug_types
);
23312 sig_type
= (struct signatured_type
*) per_cu
;
23314 gdb_assert (per_cu
->cu
== NULL
);
23316 read_signatured_type (sig_type
);
23318 gdb_assert (per_cu
->cu
!= NULL
);
23321 /* die_reader_func for read_signatured_type.
23322 This is identical to load_full_comp_unit_reader,
23323 but is kept separate for now. */
23326 read_signatured_type_reader (const struct die_reader_specs
*reader
,
23327 const gdb_byte
*info_ptr
,
23328 struct die_info
*comp_unit_die
,
23332 struct dwarf2_cu
*cu
= reader
->cu
;
23334 gdb_assert (cu
->die_hash
== NULL
);
23336 htab_create_alloc_ex (cu
->header
.length
/ 12,
23340 &cu
->comp_unit_obstack
,
23341 hashtab_obstack_allocate
,
23342 dummy_obstack_deallocate
);
23345 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
23346 &info_ptr
, comp_unit_die
);
23347 cu
->dies
= comp_unit_die
;
23348 /* comp_unit_die is not stored in die_hash, no need. */
23350 /* We try not to read any attributes in this function, because not
23351 all CUs needed for references have been loaded yet, and symbol
23352 table processing isn't initialized. But we have to set the CU language,
23353 or we won't be able to build types correctly.
23354 Similarly, if we do not read the producer, we can not apply
23355 producer-specific interpretation. */
23356 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
23359 /* Read in a signatured type and build its CU and DIEs.
23360 If the type is a stub for the real type in a DWO file,
23361 read in the real type from the DWO file as well. */
23364 read_signatured_type (struct signatured_type
*sig_type
)
23366 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
23368 gdb_assert (per_cu
->is_debug_types
);
23369 gdb_assert (per_cu
->cu
== NULL
);
23371 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1, false,
23372 read_signatured_type_reader
, NULL
);
23373 sig_type
->per_cu
.tu_read
= 1;
23376 /* Decode simple location descriptions.
23377 Given a pointer to a dwarf block that defines a location, compute
23378 the location and return the value.
23380 NOTE drow/2003-11-18: This function is called in two situations
23381 now: for the address of static or global variables (partial symbols
23382 only) and for offsets into structures which are expected to be
23383 (more or less) constant. The partial symbol case should go away,
23384 and only the constant case should remain. That will let this
23385 function complain more accurately. A few special modes are allowed
23386 without complaint for global variables (for instance, global
23387 register values and thread-local values).
23389 A location description containing no operations indicates that the
23390 object is optimized out. The return value is 0 for that case.
23391 FIXME drow/2003-11-16: No callers check for this case any more; soon all
23392 callers will only want a very basic result and this can become a
23395 Note that stack[0] is unused except as a default error return. */
23398 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
23400 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
23402 size_t size
= blk
->size
;
23403 const gdb_byte
*data
= blk
->data
;
23404 CORE_ADDR stack
[64];
23406 unsigned int bytes_read
, unsnd
;
23412 stack
[++stacki
] = 0;
23451 stack
[++stacki
] = op
- DW_OP_lit0
;
23486 stack
[++stacki
] = op
- DW_OP_reg0
;
23488 dwarf2_complex_location_expr_complaint ();
23492 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
23494 stack
[++stacki
] = unsnd
;
23496 dwarf2_complex_location_expr_complaint ();
23500 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
23505 case DW_OP_const1u
:
23506 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
23510 case DW_OP_const1s
:
23511 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
23515 case DW_OP_const2u
:
23516 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
23520 case DW_OP_const2s
:
23521 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
23525 case DW_OP_const4u
:
23526 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
23530 case DW_OP_const4s
:
23531 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
23535 case DW_OP_const8u
:
23536 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
23541 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
23547 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
23552 stack
[stacki
+ 1] = stack
[stacki
];
23557 stack
[stacki
- 1] += stack
[stacki
];
23561 case DW_OP_plus_uconst
:
23562 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
23568 stack
[stacki
- 1] -= stack
[stacki
];
23573 /* If we're not the last op, then we definitely can't encode
23574 this using GDB's address_class enum. This is valid for partial
23575 global symbols, although the variable's address will be bogus
23578 dwarf2_complex_location_expr_complaint ();
23581 case DW_OP_GNU_push_tls_address
:
23582 case DW_OP_form_tls_address
:
23583 /* The top of the stack has the offset from the beginning
23584 of the thread control block at which the variable is located. */
23585 /* Nothing should follow this operator, so the top of stack would
23587 /* This is valid for partial global symbols, but the variable's
23588 address will be bogus in the psymtab. Make it always at least
23589 non-zero to not look as a variable garbage collected by linker
23590 which have DW_OP_addr 0. */
23592 dwarf2_complex_location_expr_complaint ();
23596 case DW_OP_GNU_uninit
:
23599 case DW_OP_GNU_addr_index
:
23600 case DW_OP_GNU_const_index
:
23601 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
23608 const char *name
= get_DW_OP_name (op
);
23611 complaint (_("unsupported stack op: '%s'"),
23614 complaint (_("unsupported stack op: '%02x'"),
23618 return (stack
[stacki
]);
23621 /* Enforce maximum stack depth of SIZE-1 to avoid writing
23622 outside of the allocated space. Also enforce minimum>0. */
23623 if (stacki
>= ARRAY_SIZE (stack
) - 1)
23625 complaint (_("location description stack overflow"));
23631 complaint (_("location description stack underflow"));
23635 return (stack
[stacki
]);
23638 /* memory allocation interface */
23640 static struct dwarf_block
*
23641 dwarf_alloc_block (struct dwarf2_cu
*cu
)
23643 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
23646 static struct die_info
*
23647 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
23649 struct die_info
*die
;
23650 size_t size
= sizeof (struct die_info
);
23653 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
23655 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
23656 memset (die
, 0, sizeof (struct die_info
));
23661 /* Macro support. */
23663 /* Return file name relative to the compilation directory of file number I in
23664 *LH's file name table. The result is allocated using xmalloc; the caller is
23665 responsible for freeing it. */
23668 file_file_name (int file
, struct line_header
*lh
)
23670 /* Is the file number a valid index into the line header's file name
23671 table? Remember that file numbers start with one, not zero. */
23672 if (1 <= file
&& file
<= lh
->file_names
.size ())
23674 const file_entry
&fe
= lh
->file_names
[file
- 1];
23676 if (!IS_ABSOLUTE_PATH (fe
.name
))
23678 const char *dir
= fe
.include_dir (lh
);
23680 return concat (dir
, SLASH_STRING
, fe
.name
, (char *) NULL
);
23682 return xstrdup (fe
.name
);
23686 /* The compiler produced a bogus file number. We can at least
23687 record the macro definitions made in the file, even if we
23688 won't be able to find the file by name. */
23689 char fake_name
[80];
23691 xsnprintf (fake_name
, sizeof (fake_name
),
23692 "<bad macro file number %d>", file
);
23694 complaint (_("bad file number in macro information (%d)"),
23697 return xstrdup (fake_name
);
23701 /* Return the full name of file number I in *LH's file name table.
23702 Use COMP_DIR as the name of the current directory of the
23703 compilation. The result is allocated using xmalloc; the caller is
23704 responsible for freeing it. */
23706 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
23708 /* Is the file number a valid index into the line header's file name
23709 table? Remember that file numbers start with one, not zero. */
23710 if (1 <= file
&& file
<= lh
->file_names
.size ())
23712 char *relative
= file_file_name (file
, lh
);
23714 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
23716 return reconcat (relative
, comp_dir
, SLASH_STRING
,
23717 relative
, (char *) NULL
);
23720 return file_file_name (file
, lh
);
23724 static struct macro_source_file
*
23725 macro_start_file (struct dwarf2_cu
*cu
,
23726 int file
, int line
,
23727 struct macro_source_file
*current_file
,
23728 struct line_header
*lh
)
23730 /* File name relative to the compilation directory of this source file. */
23731 char *file_name
= file_file_name (file
, lh
);
23733 if (! current_file
)
23735 /* Note: We don't create a macro table for this compilation unit
23736 at all until we actually get a filename. */
23737 struct macro_table
*macro_table
= cu
->builder
->get_macro_table ();
23739 /* If we have no current file, then this must be the start_file
23740 directive for the compilation unit's main source file. */
23741 current_file
= macro_set_main (macro_table
, file_name
);
23742 macro_define_special (macro_table
);
23745 current_file
= macro_include (current_file
, line
, file_name
);
23749 return current_file
;
23752 static const char *
23753 consume_improper_spaces (const char *p
, const char *body
)
23757 complaint (_("macro definition contains spaces "
23758 "in formal argument list:\n`%s'"),
23770 parse_macro_definition (struct macro_source_file
*file
, int line
,
23775 /* The body string takes one of two forms. For object-like macro
23776 definitions, it should be:
23778 <macro name> " " <definition>
23780 For function-like macro definitions, it should be:
23782 <macro name> "() " <definition>
23784 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
23786 Spaces may appear only where explicitly indicated, and in the
23789 The Dwarf 2 spec says that an object-like macro's name is always
23790 followed by a space, but versions of GCC around March 2002 omit
23791 the space when the macro's definition is the empty string.
23793 The Dwarf 2 spec says that there should be no spaces between the
23794 formal arguments in a function-like macro's formal argument list,
23795 but versions of GCC around March 2002 include spaces after the
23799 /* Find the extent of the macro name. The macro name is terminated
23800 by either a space or null character (for an object-like macro) or
23801 an opening paren (for a function-like macro). */
23802 for (p
= body
; *p
; p
++)
23803 if (*p
== ' ' || *p
== '(')
23806 if (*p
== ' ' || *p
== '\0')
23808 /* It's an object-like macro. */
23809 int name_len
= p
- body
;
23810 char *name
= savestring (body
, name_len
);
23811 const char *replacement
;
23814 replacement
= body
+ name_len
+ 1;
23817 dwarf2_macro_malformed_definition_complaint (body
);
23818 replacement
= body
+ name_len
;
23821 macro_define_object (file
, line
, name
, replacement
);
23825 else if (*p
== '(')
23827 /* It's a function-like macro. */
23828 char *name
= savestring (body
, p
- body
);
23831 char **argv
= XNEWVEC (char *, argv_size
);
23835 p
= consume_improper_spaces (p
, body
);
23837 /* Parse the formal argument list. */
23838 while (*p
&& *p
!= ')')
23840 /* Find the extent of the current argument name. */
23841 const char *arg_start
= p
;
23843 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
23846 if (! *p
|| p
== arg_start
)
23847 dwarf2_macro_malformed_definition_complaint (body
);
23850 /* Make sure argv has room for the new argument. */
23851 if (argc
>= argv_size
)
23854 argv
= XRESIZEVEC (char *, argv
, argv_size
);
23857 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
23860 p
= consume_improper_spaces (p
, body
);
23862 /* Consume the comma, if present. */
23867 p
= consume_improper_spaces (p
, body
);
23876 /* Perfectly formed definition, no complaints. */
23877 macro_define_function (file
, line
, name
,
23878 argc
, (const char **) argv
,
23880 else if (*p
== '\0')
23882 /* Complain, but do define it. */
23883 dwarf2_macro_malformed_definition_complaint (body
);
23884 macro_define_function (file
, line
, name
,
23885 argc
, (const char **) argv
,
23889 /* Just complain. */
23890 dwarf2_macro_malformed_definition_complaint (body
);
23893 /* Just complain. */
23894 dwarf2_macro_malformed_definition_complaint (body
);
23900 for (i
= 0; i
< argc
; i
++)
23906 dwarf2_macro_malformed_definition_complaint (body
);
23909 /* Skip some bytes from BYTES according to the form given in FORM.
23910 Returns the new pointer. */
23912 static const gdb_byte
*
23913 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
23914 enum dwarf_form form
,
23915 unsigned int offset_size
,
23916 struct dwarf2_section_info
*section
)
23918 unsigned int bytes_read
;
23922 case DW_FORM_data1
:
23927 case DW_FORM_data2
:
23931 case DW_FORM_data4
:
23935 case DW_FORM_data8
:
23939 case DW_FORM_data16
:
23943 case DW_FORM_string
:
23944 read_direct_string (abfd
, bytes
, &bytes_read
);
23945 bytes
+= bytes_read
;
23948 case DW_FORM_sec_offset
:
23950 case DW_FORM_GNU_strp_alt
:
23951 bytes
+= offset_size
;
23954 case DW_FORM_block
:
23955 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
23956 bytes
+= bytes_read
;
23959 case DW_FORM_block1
:
23960 bytes
+= 1 + read_1_byte (abfd
, bytes
);
23962 case DW_FORM_block2
:
23963 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
23965 case DW_FORM_block4
:
23966 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
23969 case DW_FORM_sdata
:
23970 case DW_FORM_udata
:
23971 case DW_FORM_GNU_addr_index
:
23972 case DW_FORM_GNU_str_index
:
23973 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
23976 dwarf2_section_buffer_overflow_complaint (section
);
23981 case DW_FORM_implicit_const
:
23986 complaint (_("invalid form 0x%x in `%s'"),
23987 form
, get_section_name (section
));
23995 /* A helper for dwarf_decode_macros that handles skipping an unknown
23996 opcode. Returns an updated pointer to the macro data buffer; or,
23997 on error, issues a complaint and returns NULL. */
23999 static const gdb_byte
*
24000 skip_unknown_opcode (unsigned int opcode
,
24001 const gdb_byte
**opcode_definitions
,
24002 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24004 unsigned int offset_size
,
24005 struct dwarf2_section_info
*section
)
24007 unsigned int bytes_read
, i
;
24009 const gdb_byte
*defn
;
24011 if (opcode_definitions
[opcode
] == NULL
)
24013 complaint (_("unrecognized DW_MACFINO opcode 0x%x"),
24018 defn
= opcode_definitions
[opcode
];
24019 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
24020 defn
+= bytes_read
;
24022 for (i
= 0; i
< arg
; ++i
)
24024 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
24025 (enum dwarf_form
) defn
[i
], offset_size
,
24027 if (mac_ptr
== NULL
)
24029 /* skip_form_bytes already issued the complaint. */
24037 /* A helper function which parses the header of a macro section.
24038 If the macro section is the extended (for now called "GNU") type,
24039 then this updates *OFFSET_SIZE. Returns a pointer to just after
24040 the header, or issues a complaint and returns NULL on error. */
24042 static const gdb_byte
*
24043 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
24045 const gdb_byte
*mac_ptr
,
24046 unsigned int *offset_size
,
24047 int section_is_gnu
)
24049 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
24051 if (section_is_gnu
)
24053 unsigned int version
, flags
;
24055 version
= read_2_bytes (abfd
, mac_ptr
);
24056 if (version
!= 4 && version
!= 5)
24058 complaint (_("unrecognized version `%d' in .debug_macro section"),
24064 flags
= read_1_byte (abfd
, mac_ptr
);
24066 *offset_size
= (flags
& 1) ? 8 : 4;
24068 if ((flags
& 2) != 0)
24069 /* We don't need the line table offset. */
24070 mac_ptr
+= *offset_size
;
24072 /* Vendor opcode descriptions. */
24073 if ((flags
& 4) != 0)
24075 unsigned int i
, count
;
24077 count
= read_1_byte (abfd
, mac_ptr
);
24079 for (i
= 0; i
< count
; ++i
)
24081 unsigned int opcode
, bytes_read
;
24084 opcode
= read_1_byte (abfd
, mac_ptr
);
24086 opcode_definitions
[opcode
] = mac_ptr
;
24087 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24088 mac_ptr
+= bytes_read
;
24097 /* A helper for dwarf_decode_macros that handles the GNU extensions,
24098 including DW_MACRO_import. */
24101 dwarf_decode_macro_bytes (struct dwarf2_cu
*cu
,
24103 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24104 struct macro_source_file
*current_file
,
24105 struct line_header
*lh
,
24106 struct dwarf2_section_info
*section
,
24107 int section_is_gnu
, int section_is_dwz
,
24108 unsigned int offset_size
,
24109 htab_t include_hash
)
24111 struct dwarf2_per_objfile
*dwarf2_per_objfile
24112 = cu
->per_cu
->dwarf2_per_objfile
;
24113 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24114 enum dwarf_macro_record_type macinfo_type
;
24115 int at_commandline
;
24116 const gdb_byte
*opcode_definitions
[256];
24118 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24119 &offset_size
, section_is_gnu
);
24120 if (mac_ptr
== NULL
)
24122 /* We already issued a complaint. */
24126 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
24127 GDB is still reading the definitions from command line. First
24128 DW_MACINFO_start_file will need to be ignored as it was already executed
24129 to create CURRENT_FILE for the main source holding also the command line
24130 definitions. On first met DW_MACINFO_start_file this flag is reset to
24131 normally execute all the remaining DW_MACINFO_start_file macinfos. */
24133 at_commandline
= 1;
24137 /* Do we at least have room for a macinfo type byte? */
24138 if (mac_ptr
>= mac_end
)
24140 dwarf2_section_buffer_overflow_complaint (section
);
24144 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24147 /* Note that we rely on the fact that the corresponding GNU and
24148 DWARF constants are the same. */
24150 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24151 switch (macinfo_type
)
24153 /* A zero macinfo type indicates the end of the macro
24158 case DW_MACRO_define
:
24159 case DW_MACRO_undef
:
24160 case DW_MACRO_define_strp
:
24161 case DW_MACRO_undef_strp
:
24162 case DW_MACRO_define_sup
:
24163 case DW_MACRO_undef_sup
:
24165 unsigned int bytes_read
;
24170 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24171 mac_ptr
+= bytes_read
;
24173 if (macinfo_type
== DW_MACRO_define
24174 || macinfo_type
== DW_MACRO_undef
)
24176 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24177 mac_ptr
+= bytes_read
;
24181 LONGEST str_offset
;
24183 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24184 mac_ptr
+= offset_size
;
24186 if (macinfo_type
== DW_MACRO_define_sup
24187 || macinfo_type
== DW_MACRO_undef_sup
24190 struct dwz_file
*dwz
24191 = dwarf2_get_dwz_file (dwarf2_per_objfile
);
24193 body
= read_indirect_string_from_dwz (objfile
,
24197 body
= read_indirect_string_at_offset (dwarf2_per_objfile
,
24201 is_define
= (macinfo_type
== DW_MACRO_define
24202 || macinfo_type
== DW_MACRO_define_strp
24203 || macinfo_type
== DW_MACRO_define_sup
);
24204 if (! current_file
)
24206 /* DWARF violation as no main source is present. */
24207 complaint (_("debug info with no main source gives macro %s "
24209 is_define
? _("definition") : _("undefinition"),
24213 if ((line
== 0 && !at_commandline
)
24214 || (line
!= 0 && at_commandline
))
24215 complaint (_("debug info gives %s macro %s with %s line %d: %s"),
24216 at_commandline
? _("command-line") : _("in-file"),
24217 is_define
? _("definition") : _("undefinition"),
24218 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
24221 parse_macro_definition (current_file
, line
, body
);
24224 gdb_assert (macinfo_type
== DW_MACRO_undef
24225 || macinfo_type
== DW_MACRO_undef_strp
24226 || macinfo_type
== DW_MACRO_undef_sup
);
24227 macro_undef (current_file
, line
, body
);
24232 case DW_MACRO_start_file
:
24234 unsigned int bytes_read
;
24237 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24238 mac_ptr
+= bytes_read
;
24239 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24240 mac_ptr
+= bytes_read
;
24242 if ((line
== 0 && !at_commandline
)
24243 || (line
!= 0 && at_commandline
))
24244 complaint (_("debug info gives source %d included "
24245 "from %s at %s line %d"),
24246 file
, at_commandline
? _("command-line") : _("file"),
24247 line
== 0 ? _("zero") : _("non-zero"), line
);
24249 if (at_commandline
)
24251 /* This DW_MACRO_start_file was executed in the
24253 at_commandline
= 0;
24256 current_file
= macro_start_file (cu
, file
, line
, current_file
,
24261 case DW_MACRO_end_file
:
24262 if (! current_file
)
24263 complaint (_("macro debug info has an unmatched "
24264 "`close_file' directive"));
24267 current_file
= current_file
->included_by
;
24268 if (! current_file
)
24270 enum dwarf_macro_record_type next_type
;
24272 /* GCC circa March 2002 doesn't produce the zero
24273 type byte marking the end of the compilation
24274 unit. Complain if it's not there, but exit no
24277 /* Do we at least have room for a macinfo type byte? */
24278 if (mac_ptr
>= mac_end
)
24280 dwarf2_section_buffer_overflow_complaint (section
);
24284 /* We don't increment mac_ptr here, so this is just
24287 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
24289 if (next_type
!= 0)
24290 complaint (_("no terminating 0-type entry for "
24291 "macros in `.debug_macinfo' section"));
24298 case DW_MACRO_import
:
24299 case DW_MACRO_import_sup
:
24303 bfd
*include_bfd
= abfd
;
24304 struct dwarf2_section_info
*include_section
= section
;
24305 const gdb_byte
*include_mac_end
= mac_end
;
24306 int is_dwz
= section_is_dwz
;
24307 const gdb_byte
*new_mac_ptr
;
24309 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24310 mac_ptr
+= offset_size
;
24312 if (macinfo_type
== DW_MACRO_import_sup
)
24314 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
24316 dwarf2_read_section (objfile
, &dwz
->macro
);
24318 include_section
= &dwz
->macro
;
24319 include_bfd
= get_section_bfd_owner (include_section
);
24320 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
24324 new_mac_ptr
= include_section
->buffer
+ offset
;
24325 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
24329 /* This has actually happened; see
24330 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
24331 complaint (_("recursive DW_MACRO_import in "
24332 ".debug_macro section"));
24336 *slot
= (void *) new_mac_ptr
;
24338 dwarf_decode_macro_bytes (cu
, include_bfd
, new_mac_ptr
,
24339 include_mac_end
, current_file
, lh
,
24340 section
, section_is_gnu
, is_dwz
,
24341 offset_size
, include_hash
);
24343 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
24348 case DW_MACINFO_vendor_ext
:
24349 if (!section_is_gnu
)
24351 unsigned int bytes_read
;
24353 /* This reads the constant, but since we don't recognize
24354 any vendor extensions, we ignore it. */
24355 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24356 mac_ptr
+= bytes_read
;
24357 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24358 mac_ptr
+= bytes_read
;
24360 /* We don't recognize any vendor extensions. */
24366 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24367 mac_ptr
, mac_end
, abfd
, offset_size
,
24369 if (mac_ptr
== NULL
)
24374 } while (macinfo_type
!= 0);
24378 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
24379 int section_is_gnu
)
24381 struct dwarf2_per_objfile
*dwarf2_per_objfile
24382 = cu
->per_cu
->dwarf2_per_objfile
;
24383 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24384 struct line_header
*lh
= cu
->line_header
;
24386 const gdb_byte
*mac_ptr
, *mac_end
;
24387 struct macro_source_file
*current_file
= 0;
24388 enum dwarf_macro_record_type macinfo_type
;
24389 unsigned int offset_size
= cu
->header
.offset_size
;
24390 const gdb_byte
*opcode_definitions
[256];
24392 struct dwarf2_section_info
*section
;
24393 const char *section_name
;
24395 if (cu
->dwo_unit
!= NULL
)
24397 if (section_is_gnu
)
24399 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
24400 section_name
= ".debug_macro.dwo";
24404 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
24405 section_name
= ".debug_macinfo.dwo";
24410 if (section_is_gnu
)
24412 section
= &dwarf2_per_objfile
->macro
;
24413 section_name
= ".debug_macro";
24417 section
= &dwarf2_per_objfile
->macinfo
;
24418 section_name
= ".debug_macinfo";
24422 dwarf2_read_section (objfile
, section
);
24423 if (section
->buffer
== NULL
)
24425 complaint (_("missing %s section"), section_name
);
24428 abfd
= get_section_bfd_owner (section
);
24430 /* First pass: Find the name of the base filename.
24431 This filename is needed in order to process all macros whose definition
24432 (or undefinition) comes from the command line. These macros are defined
24433 before the first DW_MACINFO_start_file entry, and yet still need to be
24434 associated to the base file.
24436 To determine the base file name, we scan the macro definitions until we
24437 reach the first DW_MACINFO_start_file entry. We then initialize
24438 CURRENT_FILE accordingly so that any macro definition found before the
24439 first DW_MACINFO_start_file can still be associated to the base file. */
24441 mac_ptr
= section
->buffer
+ offset
;
24442 mac_end
= section
->buffer
+ section
->size
;
24444 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24445 &offset_size
, section_is_gnu
);
24446 if (mac_ptr
== NULL
)
24448 /* We already issued a complaint. */
24454 /* Do we at least have room for a macinfo type byte? */
24455 if (mac_ptr
>= mac_end
)
24457 /* Complaint is printed during the second pass as GDB will probably
24458 stop the first pass earlier upon finding
24459 DW_MACINFO_start_file. */
24463 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24466 /* Note that we rely on the fact that the corresponding GNU and
24467 DWARF constants are the same. */
24469 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24470 switch (macinfo_type
)
24472 /* A zero macinfo type indicates the end of the macro
24477 case DW_MACRO_define
:
24478 case DW_MACRO_undef
:
24479 /* Only skip the data by MAC_PTR. */
24481 unsigned int bytes_read
;
24483 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24484 mac_ptr
+= bytes_read
;
24485 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24486 mac_ptr
+= bytes_read
;
24490 case DW_MACRO_start_file
:
24492 unsigned int bytes_read
;
24495 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24496 mac_ptr
+= bytes_read
;
24497 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24498 mac_ptr
+= bytes_read
;
24500 current_file
= macro_start_file (cu
, file
, line
, current_file
, lh
);
24504 case DW_MACRO_end_file
:
24505 /* No data to skip by MAC_PTR. */
24508 case DW_MACRO_define_strp
:
24509 case DW_MACRO_undef_strp
:
24510 case DW_MACRO_define_sup
:
24511 case DW_MACRO_undef_sup
:
24513 unsigned int bytes_read
;
24515 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24516 mac_ptr
+= bytes_read
;
24517 mac_ptr
+= offset_size
;
24521 case DW_MACRO_import
:
24522 case DW_MACRO_import_sup
:
24523 /* Note that, according to the spec, a transparent include
24524 chain cannot call DW_MACRO_start_file. So, we can just
24525 skip this opcode. */
24526 mac_ptr
+= offset_size
;
24529 case DW_MACINFO_vendor_ext
:
24530 /* Only skip the data by MAC_PTR. */
24531 if (!section_is_gnu
)
24533 unsigned int bytes_read
;
24535 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24536 mac_ptr
+= bytes_read
;
24537 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24538 mac_ptr
+= bytes_read
;
24543 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24544 mac_ptr
, mac_end
, abfd
, offset_size
,
24546 if (mac_ptr
== NULL
)
24551 } while (macinfo_type
!= 0 && current_file
== NULL
);
24553 /* Second pass: Process all entries.
24555 Use the AT_COMMAND_LINE flag to determine whether we are still processing
24556 command-line macro definitions/undefinitions. This flag is unset when we
24557 reach the first DW_MACINFO_start_file entry. */
24559 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
24561 NULL
, xcalloc
, xfree
));
24562 mac_ptr
= section
->buffer
+ offset
;
24563 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
24564 *slot
= (void *) mac_ptr
;
24565 dwarf_decode_macro_bytes (cu
, abfd
, mac_ptr
, mac_end
,
24566 current_file
, lh
, section
,
24567 section_is_gnu
, 0, offset_size
,
24568 include_hash
.get ());
24571 /* Check if the attribute's form is a DW_FORM_block*
24572 if so return true else false. */
24575 attr_form_is_block (const struct attribute
*attr
)
24577 return (attr
== NULL
? 0 :
24578 attr
->form
== DW_FORM_block1
24579 || attr
->form
== DW_FORM_block2
24580 || attr
->form
== DW_FORM_block4
24581 || attr
->form
== DW_FORM_block
24582 || attr
->form
== DW_FORM_exprloc
);
24585 /* Return non-zero if ATTR's value is a section offset --- classes
24586 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
24587 You may use DW_UNSND (attr) to retrieve such offsets.
24589 Section 7.5.4, "Attribute Encodings", explains that no attribute
24590 may have a value that belongs to more than one of these classes; it
24591 would be ambiguous if we did, because we use the same forms for all
24595 attr_form_is_section_offset (const struct attribute
*attr
)
24597 return (attr
->form
== DW_FORM_data4
24598 || attr
->form
== DW_FORM_data8
24599 || attr
->form
== DW_FORM_sec_offset
);
24602 /* Return non-zero if ATTR's value falls in the 'constant' class, or
24603 zero otherwise. When this function returns true, you can apply
24604 dwarf2_get_attr_constant_value to it.
24606 However, note that for some attributes you must check
24607 attr_form_is_section_offset before using this test. DW_FORM_data4
24608 and DW_FORM_data8 are members of both the constant class, and of
24609 the classes that contain offsets into other debug sections
24610 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
24611 that, if an attribute's can be either a constant or one of the
24612 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
24613 taken as section offsets, not constants.
24615 DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
24616 cannot handle that. */
24619 attr_form_is_constant (const struct attribute
*attr
)
24621 switch (attr
->form
)
24623 case DW_FORM_sdata
:
24624 case DW_FORM_udata
:
24625 case DW_FORM_data1
:
24626 case DW_FORM_data2
:
24627 case DW_FORM_data4
:
24628 case DW_FORM_data8
:
24629 case DW_FORM_implicit_const
:
24637 /* DW_ADDR is always stored already as sect_offset; despite for the forms
24638 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
24641 attr_form_is_ref (const struct attribute
*attr
)
24643 switch (attr
->form
)
24645 case DW_FORM_ref_addr
:
24650 case DW_FORM_ref_udata
:
24651 case DW_FORM_GNU_ref_alt
:
24658 /* Return the .debug_loc section to use for CU.
24659 For DWO files use .debug_loc.dwo. */
24661 static struct dwarf2_section_info
*
24662 cu_debug_loc_section (struct dwarf2_cu
*cu
)
24664 struct dwarf2_per_objfile
*dwarf2_per_objfile
24665 = cu
->per_cu
->dwarf2_per_objfile
;
24669 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
24671 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
24673 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
24674 : &dwarf2_per_objfile
->loc
);
24677 /* A helper function that fills in a dwarf2_loclist_baton. */
24680 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
24681 struct dwarf2_loclist_baton
*baton
,
24682 const struct attribute
*attr
)
24684 struct dwarf2_per_objfile
*dwarf2_per_objfile
24685 = cu
->per_cu
->dwarf2_per_objfile
;
24686 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24688 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
24690 baton
->per_cu
= cu
->per_cu
;
24691 gdb_assert (baton
->per_cu
);
24692 /* We don't know how long the location list is, but make sure we
24693 don't run off the edge of the section. */
24694 baton
->size
= section
->size
- DW_UNSND (attr
);
24695 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
24696 baton
->base_address
= cu
->base_address
;
24697 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
24701 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
24702 struct dwarf2_cu
*cu
, int is_block
)
24704 struct dwarf2_per_objfile
*dwarf2_per_objfile
24705 = cu
->per_cu
->dwarf2_per_objfile
;
24706 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24707 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24709 if (attr_form_is_section_offset (attr
)
24710 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
24711 the section. If so, fall through to the complaint in the
24713 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
24715 struct dwarf2_loclist_baton
*baton
;
24717 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
24719 fill_in_loclist_baton (cu
, baton
, attr
);
24721 if (cu
->base_known
== 0)
24722 complaint (_("Location list used without "
24723 "specifying the CU base address."));
24725 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24726 ? dwarf2_loclist_block_index
24727 : dwarf2_loclist_index
);
24728 SYMBOL_LOCATION_BATON (sym
) = baton
;
24732 struct dwarf2_locexpr_baton
*baton
;
24734 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
24735 baton
->per_cu
= cu
->per_cu
;
24736 gdb_assert (baton
->per_cu
);
24738 if (attr_form_is_block (attr
))
24740 /* Note that we're just copying the block's data pointer
24741 here, not the actual data. We're still pointing into the
24742 info_buffer for SYM's objfile; right now we never release
24743 that buffer, but when we do clean up properly this may
24745 baton
->size
= DW_BLOCK (attr
)->size
;
24746 baton
->data
= DW_BLOCK (attr
)->data
;
24750 dwarf2_invalid_attrib_class_complaint ("location description",
24751 SYMBOL_NATURAL_NAME (sym
));
24755 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24756 ? dwarf2_locexpr_block_index
24757 : dwarf2_locexpr_index
);
24758 SYMBOL_LOCATION_BATON (sym
) = baton
;
24762 /* Return the OBJFILE associated with the compilation unit CU. If CU
24763 came from a separate debuginfo file, then the master objfile is
24767 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
24769 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24771 /* Return the master objfile, so that we can report and look up the
24772 correct file containing this variable. */
24773 if (objfile
->separate_debug_objfile_backlink
)
24774 objfile
= objfile
->separate_debug_objfile_backlink
;
24779 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
24780 (CU_HEADERP is unused in such case) or prepare a temporary copy at
24781 CU_HEADERP first. */
24783 static const struct comp_unit_head
*
24784 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
24785 struct dwarf2_per_cu_data
*per_cu
)
24787 const gdb_byte
*info_ptr
;
24790 return &per_cu
->cu
->header
;
24792 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
24794 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
24795 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
24796 rcuh_kind::COMPILE
);
24801 /* Return the address size given in the compilation unit header for CU. */
24804 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24806 struct comp_unit_head cu_header_local
;
24807 const struct comp_unit_head
*cu_headerp
;
24809 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24811 return cu_headerp
->addr_size
;
24814 /* Return the offset size given in the compilation unit header for CU. */
24817 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
24819 struct comp_unit_head cu_header_local
;
24820 const struct comp_unit_head
*cu_headerp
;
24822 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24824 return cu_headerp
->offset_size
;
24827 /* See its dwarf2loc.h declaration. */
24830 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24832 struct comp_unit_head cu_header_local
;
24833 const struct comp_unit_head
*cu_headerp
;
24835 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24837 if (cu_headerp
->version
== 2)
24838 return cu_headerp
->addr_size
;
24840 return cu_headerp
->offset_size
;
24843 /* Return the text offset of the CU. The returned offset comes from
24844 this CU's objfile. If this objfile came from a separate debuginfo
24845 file, then the offset may be different from the corresponding
24846 offset in the parent objfile. */
24849 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
24851 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24853 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
24856 /* Return DWARF version number of PER_CU. */
24859 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
24861 return per_cu
->dwarf_version
;
24864 /* Locate the .debug_info compilation unit from CU's objfile which contains
24865 the DIE at OFFSET. Raises an error on failure. */
24867 static struct dwarf2_per_cu_data
*
24868 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
24869 unsigned int offset_in_dwz
,
24870 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
24872 struct dwarf2_per_cu_data
*this_cu
;
24874 const sect_offset
*cu_off
;
24877 high
= dwarf2_per_objfile
->all_comp_units
.size () - 1;
24880 struct dwarf2_per_cu_data
*mid_cu
;
24881 int mid
= low
+ (high
- low
) / 2;
24883 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
24884 cu_off
= &mid_cu
->sect_off
;
24885 if (mid_cu
->is_dwz
> offset_in_dwz
24886 || (mid_cu
->is_dwz
== offset_in_dwz
&& *cu_off
>= sect_off
))
24891 gdb_assert (low
== high
);
24892 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
24893 cu_off
= &this_cu
->sect_off
;
24894 if (this_cu
->is_dwz
!= offset_in_dwz
|| *cu_off
> sect_off
)
24896 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
24897 error (_("Dwarf Error: could not find partial DIE containing "
24898 "offset %s [in module %s]"),
24899 sect_offset_str (sect_off
),
24900 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
24902 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
24904 return dwarf2_per_objfile
->all_comp_units
[low
-1];
24908 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
24909 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
24910 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
24911 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
24912 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
24917 /* Initialize dwarf2_cu CU, owned by PER_CU. */
24919 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
24920 : per_cu (per_cu_
),
24923 checked_producer (0),
24924 producer_is_gxx_lt_4_6 (0),
24925 producer_is_gcc_lt_4_3 (0),
24926 producer_is_icc_lt_14 (0),
24927 processing_has_namespace_info (0)
24932 /* Destroy a dwarf2_cu. */
24934 dwarf2_cu::~dwarf2_cu ()
24939 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
24942 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
24943 enum language pretend_language
)
24945 struct attribute
*attr
;
24947 /* Set the language we're debugging. */
24948 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
24950 set_cu_language (DW_UNSND (attr
), cu
);
24953 cu
->language
= pretend_language
;
24954 cu
->language_defn
= language_def (cu
->language
);
24957 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
24960 /* Increase the age counter on each cached compilation unit, and free
24961 any that are too old. */
24964 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
24966 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
24968 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
24969 per_cu
= dwarf2_per_objfile
->read_in_chain
;
24970 while (per_cu
!= NULL
)
24972 per_cu
->cu
->last_used
++;
24973 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
24974 dwarf2_mark (per_cu
->cu
);
24975 per_cu
= per_cu
->cu
->read_in_chain
;
24978 per_cu
= dwarf2_per_objfile
->read_in_chain
;
24979 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
24980 while (per_cu
!= NULL
)
24982 struct dwarf2_per_cu_data
*next_cu
;
24984 next_cu
= per_cu
->cu
->read_in_chain
;
24986 if (!per_cu
->cu
->mark
)
24989 *last_chain
= next_cu
;
24992 last_chain
= &per_cu
->cu
->read_in_chain
;
24998 /* Remove a single compilation unit from the cache. */
25001 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
25003 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25004 struct dwarf2_per_objfile
*dwarf2_per_objfile
25005 = target_per_cu
->dwarf2_per_objfile
;
25007 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25008 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25009 while (per_cu
!= NULL
)
25011 struct dwarf2_per_cu_data
*next_cu
;
25013 next_cu
= per_cu
->cu
->read_in_chain
;
25015 if (per_cu
== target_per_cu
)
25019 *last_chain
= next_cu
;
25023 last_chain
= &per_cu
->cu
->read_in_chain
;
25029 /* Cleanup function for the dwarf2_per_objfile data. */
25032 dwarf2_free_objfile (struct objfile
*objfile
, void *datum
)
25034 struct dwarf2_per_objfile
*dwarf2_per_objfile
25035 = static_cast<struct dwarf2_per_objfile
*> (datum
);
25037 delete dwarf2_per_objfile
;
25040 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
25041 We store these in a hash table separate from the DIEs, and preserve them
25042 when the DIEs are flushed out of cache.
25044 The CU "per_cu" pointer is needed because offset alone is not enough to
25045 uniquely identify the type. A file may have multiple .debug_types sections,
25046 or the type may come from a DWO file. Furthermore, while it's more logical
25047 to use per_cu->section+offset, with Fission the section with the data is in
25048 the DWO file but we don't know that section at the point we need it.
25049 We have to use something in dwarf2_per_cu_data (or the pointer to it)
25050 because we can enter the lookup routine, get_die_type_at_offset, from
25051 outside this file, and thus won't necessarily have PER_CU->cu.
25052 Fortunately, PER_CU is stable for the life of the objfile. */
25054 struct dwarf2_per_cu_offset_and_type
25056 const struct dwarf2_per_cu_data
*per_cu
;
25057 sect_offset sect_off
;
25061 /* Hash function for a dwarf2_per_cu_offset_and_type. */
25064 per_cu_offset_and_type_hash (const void *item
)
25066 const struct dwarf2_per_cu_offset_and_type
*ofs
25067 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
25069 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
25072 /* Equality function for a dwarf2_per_cu_offset_and_type. */
25075 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
25077 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
25078 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
25079 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
25080 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
25082 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
25083 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
25086 /* Set the type associated with DIE to TYPE. Save it in CU's hash
25087 table if necessary. For convenience, return TYPE.
25089 The DIEs reading must have careful ordering to:
25090 * Not cause infite loops trying to read in DIEs as a prerequisite for
25091 reading current DIE.
25092 * Not trying to dereference contents of still incompletely read in types
25093 while reading in other DIEs.
25094 * Enable referencing still incompletely read in types just by a pointer to
25095 the type without accessing its fields.
25097 Therefore caller should follow these rules:
25098 * Try to fetch any prerequisite types we may need to build this DIE type
25099 before building the type and calling set_die_type.
25100 * After building type call set_die_type for current DIE as soon as
25101 possible before fetching more types to complete the current type.
25102 * Make the type as complete as possible before fetching more types. */
25104 static struct type
*
25105 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
25107 struct dwarf2_per_objfile
*dwarf2_per_objfile
25108 = cu
->per_cu
->dwarf2_per_objfile
;
25109 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
25110 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25111 struct attribute
*attr
;
25112 struct dynamic_prop prop
;
25114 /* For Ada types, make sure that the gnat-specific data is always
25115 initialized (if not already set). There are a few types where
25116 we should not be doing so, because the type-specific area is
25117 already used to hold some other piece of info (eg: TYPE_CODE_FLT
25118 where the type-specific area is used to store the floatformat).
25119 But this is not a problem, because the gnat-specific information
25120 is actually not needed for these types. */
25121 if (need_gnat_info (cu
)
25122 && TYPE_CODE (type
) != TYPE_CODE_FUNC
25123 && TYPE_CODE (type
) != TYPE_CODE_FLT
25124 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
25125 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
25126 && TYPE_CODE (type
) != TYPE_CODE_METHOD
25127 && !HAVE_GNAT_AUX_INFO (type
))
25128 INIT_GNAT_SPECIFIC (type
);
25130 /* Read DW_AT_allocated and set in type. */
25131 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
25132 if (attr_form_is_block (attr
))
25134 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25135 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
);
25137 else if (attr
!= NULL
)
25139 complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
25140 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25141 sect_offset_str (die
->sect_off
));
25144 /* Read DW_AT_associated and set in type. */
25145 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
25146 if (attr_form_is_block (attr
))
25148 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25149 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
);
25151 else if (attr
!= NULL
)
25153 complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
25154 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25155 sect_offset_str (die
->sect_off
));
25158 /* Read DW_AT_data_location and set in type. */
25159 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
25160 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25161 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
);
25163 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25165 dwarf2_per_objfile
->die_type_hash
=
25166 htab_create_alloc_ex (127,
25167 per_cu_offset_and_type_hash
,
25168 per_cu_offset_and_type_eq
,
25170 &objfile
->objfile_obstack
,
25171 hashtab_obstack_allocate
,
25172 dummy_obstack_deallocate
);
25175 ofs
.per_cu
= cu
->per_cu
;
25176 ofs
.sect_off
= die
->sect_off
;
25178 slot
= (struct dwarf2_per_cu_offset_and_type
**)
25179 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
25181 complaint (_("A problem internal to GDB: DIE %s has type already set"),
25182 sect_offset_str (die
->sect_off
));
25183 *slot
= XOBNEW (&objfile
->objfile_obstack
,
25184 struct dwarf2_per_cu_offset_and_type
);
25189 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
25190 or return NULL if the die does not have a saved type. */
25192 static struct type
*
25193 get_die_type_at_offset (sect_offset sect_off
,
25194 struct dwarf2_per_cu_data
*per_cu
)
25196 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
25197 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
25199 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25202 ofs
.per_cu
= per_cu
;
25203 ofs
.sect_off
= sect_off
;
25204 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
25205 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
25212 /* Look up the type for DIE in CU in die_type_hash,
25213 or return NULL if DIE does not have a saved type. */
25215 static struct type
*
25216 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
25218 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
25221 /* Add a dependence relationship from CU to REF_PER_CU. */
25224 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
25225 struct dwarf2_per_cu_data
*ref_per_cu
)
25229 if (cu
->dependencies
== NULL
)
25231 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
25232 NULL
, &cu
->comp_unit_obstack
,
25233 hashtab_obstack_allocate
,
25234 dummy_obstack_deallocate
);
25236 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
25238 *slot
= ref_per_cu
;
25241 /* Subroutine of dwarf2_mark to pass to htab_traverse.
25242 Set the mark field in every compilation unit in the
25243 cache that we must keep because we are keeping CU. */
25246 dwarf2_mark_helper (void **slot
, void *data
)
25248 struct dwarf2_per_cu_data
*per_cu
;
25250 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
25252 /* cu->dependencies references may not yet have been ever read if QUIT aborts
25253 reading of the chain. As such dependencies remain valid it is not much
25254 useful to track and undo them during QUIT cleanups. */
25255 if (per_cu
->cu
== NULL
)
25258 if (per_cu
->cu
->mark
)
25260 per_cu
->cu
->mark
= 1;
25262 if (per_cu
->cu
->dependencies
!= NULL
)
25263 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25268 /* Set the mark field in CU and in every other compilation unit in the
25269 cache that we must keep because we are keeping CU. */
25272 dwarf2_mark (struct dwarf2_cu
*cu
)
25277 if (cu
->dependencies
!= NULL
)
25278 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25282 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
25286 per_cu
->cu
->mark
= 0;
25287 per_cu
= per_cu
->cu
->read_in_chain
;
25291 /* Trivial hash function for partial_die_info: the hash value of a DIE
25292 is its offset in .debug_info for this objfile. */
25295 partial_die_hash (const void *item
)
25297 const struct partial_die_info
*part_die
25298 = (const struct partial_die_info
*) item
;
25300 return to_underlying (part_die
->sect_off
);
25303 /* Trivial comparison function for partial_die_info structures: two DIEs
25304 are equal if they have the same offset. */
25307 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
25309 const struct partial_die_info
*part_die_lhs
25310 = (const struct partial_die_info
*) item_lhs
;
25311 const struct partial_die_info
*part_die_rhs
25312 = (const struct partial_die_info
*) item_rhs
;
25314 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
25317 static struct cmd_list_element
*set_dwarf_cmdlist
;
25318 static struct cmd_list_element
*show_dwarf_cmdlist
;
25321 set_dwarf_cmd (const char *args
, int from_tty
)
25323 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
25328 show_dwarf_cmd (const char *args
, int from_tty
)
25330 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
25333 int dwarf_always_disassemble
;
25336 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
25337 struct cmd_list_element
*c
, const char *value
)
25339 fprintf_filtered (file
,
25340 _("Whether to always disassemble "
25341 "DWARF expressions is %s.\n"),
25346 show_check_physname (struct ui_file
*file
, int from_tty
,
25347 struct cmd_list_element
*c
, const char *value
)
25349 fprintf_filtered (file
,
25350 _("Whether to check \"physname\" is %s.\n"),
25355 _initialize_dwarf2_read (void)
25357 dwarf2_objfile_data_key
25358 = register_objfile_data_with_cleanup (nullptr, dwarf2_free_objfile
);
25360 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
25361 Set DWARF specific variables.\n\
25362 Configure DWARF variables such as the cache size"),
25363 &set_dwarf_cmdlist
, "maintenance set dwarf ",
25364 0/*allow-unknown*/, &maintenance_set_cmdlist
);
25366 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
25367 Show DWARF specific variables\n\
25368 Show DWARF variables such as the cache size"),
25369 &show_dwarf_cmdlist
, "maintenance show dwarf ",
25370 0/*allow-unknown*/, &maintenance_show_cmdlist
);
25372 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
25373 &dwarf_max_cache_age
, _("\
25374 Set the upper bound on the age of cached DWARF compilation units."), _("\
25375 Show the upper bound on the age of cached DWARF compilation units."), _("\
25376 A higher limit means that cached compilation units will be stored\n\
25377 in memory longer, and more total memory will be used. Zero disables\n\
25378 caching, which can slow down startup."),
25380 show_dwarf_max_cache_age
,
25381 &set_dwarf_cmdlist
,
25382 &show_dwarf_cmdlist
);
25384 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
25385 &dwarf_always_disassemble
, _("\
25386 Set whether `info address' always disassembles DWARF expressions."), _("\
25387 Show whether `info address' always disassembles DWARF expressions."), _("\
25388 When enabled, DWARF expressions are always printed in an assembly-like\n\
25389 syntax. When disabled, expressions will be printed in a more\n\
25390 conversational style, when possible."),
25392 show_dwarf_always_disassemble
,
25393 &set_dwarf_cmdlist
,
25394 &show_dwarf_cmdlist
);
25396 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
25397 Set debugging of the DWARF reader."), _("\
25398 Show debugging of the DWARF reader."), _("\
25399 When enabled (non-zero), debugging messages are printed during DWARF\n\
25400 reading and symtab expansion. A value of 1 (one) provides basic\n\
25401 information. A value greater than 1 provides more verbose information."),
25404 &setdebuglist
, &showdebuglist
);
25406 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
25407 Set debugging of the DWARF DIE reader."), _("\
25408 Show debugging of the DWARF DIE reader."), _("\
25409 When enabled (non-zero), DIEs are dumped after they are read in.\n\
25410 The value is the maximum depth to print."),
25413 &setdebuglist
, &showdebuglist
);
25415 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
25416 Set debugging of the dwarf line reader."), _("\
25417 Show debugging of the dwarf line reader."), _("\
25418 When enabled (non-zero), line number entries are dumped as they are read in.\n\
25419 A value of 1 (one) provides basic information.\n\
25420 A value greater than 1 provides more verbose information."),
25423 &setdebuglist
, &showdebuglist
);
25425 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
25426 Set cross-checking of \"physname\" code against demangler."), _("\
25427 Show cross-checking of \"physname\" code against demangler."), _("\
25428 When enabled, GDB's internal \"physname\" code is checked against\n\
25430 NULL
, show_check_physname
,
25431 &setdebuglist
, &showdebuglist
);
25433 add_setshow_boolean_cmd ("use-deprecated-index-sections",
25434 no_class
, &use_deprecated_index_sections
, _("\
25435 Set whether to use deprecated gdb_index sections."), _("\
25436 Show whether to use deprecated gdb_index sections."), _("\
25437 When enabled, deprecated .gdb_index sections are used anyway.\n\
25438 Normally they are ignored either because of a missing feature or\n\
25439 performance issue.\n\
25440 Warning: This option must be enabled before gdb reads the file."),
25443 &setlist
, &showlist
);
25445 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25446 &dwarf2_locexpr_funcs
);
25447 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25448 &dwarf2_loclist_funcs
);
25450 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25451 &dwarf2_block_frame_base_locexpr_funcs
);
25452 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25453 &dwarf2_block_frame_base_loclist_funcs
);
25456 selftests::register_test ("dw2_expand_symtabs_matching",
25457 selftests::dw2_expand_symtabs_matching::run_test
);