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
) - baseaddr
;
3181 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
) - 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
)
3341 end
= (gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
)
3343 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
3347 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3348 &objfile
->objfile_obstack
);
3351 /* Find a slot in the mapped index INDEX for the object named NAME.
3352 If NAME is found, set *VEC_OUT to point to the CU vector in the
3353 constant pool and return true. If NAME cannot be found, return
3357 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3358 offset_type
**vec_out
)
3361 offset_type slot
, step
;
3362 int (*cmp
) (const char *, const char *);
3364 gdb::unique_xmalloc_ptr
<char> without_params
;
3365 if (current_language
->la_language
== language_cplus
3366 || current_language
->la_language
== language_fortran
3367 || current_language
->la_language
== language_d
)
3369 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3372 if (strchr (name
, '(') != NULL
)
3374 without_params
= cp_remove_params (name
);
3376 if (without_params
!= NULL
)
3377 name
= without_params
.get ();
3381 /* Index version 4 did not support case insensitive searches. But the
3382 indices for case insensitive languages are built in lowercase, therefore
3383 simulate our NAME being searched is also lowercased. */
3384 hash
= mapped_index_string_hash ((index
->version
== 4
3385 && case_sensitivity
== case_sensitive_off
3386 ? 5 : index
->version
),
3389 slot
= hash
& (index
->symbol_table
.size () - 1);
3390 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
3391 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3397 const auto &bucket
= index
->symbol_table
[slot
];
3398 if (bucket
.name
== 0 && bucket
.vec
== 0)
3401 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
3402 if (!cmp (name
, str
))
3404 *vec_out
= (offset_type
*) (index
->constant_pool
3405 + MAYBE_SWAP (bucket
.vec
));
3409 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
3413 /* A helper function that reads the .gdb_index from SECTION and fills
3414 in MAP. FILENAME is the name of the file containing the section;
3415 it is used for error reporting. DEPRECATED_OK is true if it is
3416 ok to use deprecated sections.
3418 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3419 out parameters that are filled in with information about the CU and
3420 TU lists in the section.
3422 Returns 1 if all went well, 0 otherwise. */
3425 read_gdb_index_from_section (struct objfile
*objfile
,
3426 const char *filename
,
3428 struct dwarf2_section_info
*section
,
3429 struct mapped_index
*map
,
3430 const gdb_byte
**cu_list
,
3431 offset_type
*cu_list_elements
,
3432 const gdb_byte
**types_list
,
3433 offset_type
*types_list_elements
)
3435 const gdb_byte
*addr
;
3436 offset_type version
;
3437 offset_type
*metadata
;
3440 if (dwarf2_section_empty_p (section
))
3443 /* Older elfutils strip versions could keep the section in the main
3444 executable while splitting it for the separate debug info file. */
3445 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3448 dwarf2_read_section (objfile
, section
);
3450 addr
= section
->buffer
;
3451 /* Version check. */
3452 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3453 /* Versions earlier than 3 emitted every copy of a psymbol. This
3454 causes the index to behave very poorly for certain requests. Version 3
3455 contained incomplete addrmap. So, it seems better to just ignore such
3459 static int warning_printed
= 0;
3460 if (!warning_printed
)
3462 warning (_("Skipping obsolete .gdb_index section in %s."),
3464 warning_printed
= 1;
3468 /* Index version 4 uses a different hash function than index version
3471 Versions earlier than 6 did not emit psymbols for inlined
3472 functions. Using these files will cause GDB not to be able to
3473 set breakpoints on inlined functions by name, so we ignore these
3474 indices unless the user has done
3475 "set use-deprecated-index-sections on". */
3476 if (version
< 6 && !deprecated_ok
)
3478 static int warning_printed
= 0;
3479 if (!warning_printed
)
3482 Skipping deprecated .gdb_index section in %s.\n\
3483 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3484 to use the section anyway."),
3486 warning_printed
= 1;
3490 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3491 of the TU (for symbols coming from TUs),
3492 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3493 Plus gold-generated indices can have duplicate entries for global symbols,
3494 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3495 These are just performance bugs, and we can't distinguish gdb-generated
3496 indices from gold-generated ones, so issue no warning here. */
3498 /* Indexes with higher version than the one supported by GDB may be no
3499 longer backward compatible. */
3503 map
->version
= version
;
3505 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3508 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3509 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3513 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3514 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3515 - MAYBE_SWAP (metadata
[i
]))
3519 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3520 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3522 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3525 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3526 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3528 = gdb::array_view
<mapped_index::symbol_table_slot
>
3529 ((mapped_index::symbol_table_slot
*) symbol_table
,
3530 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3533 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3538 /* Read .gdb_index. If everything went ok, initialize the "quick"
3539 elements of all the CUs and return 1. Otherwise, return 0. */
3542 dwarf2_read_gdb_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
3544 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3545 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3546 struct dwz_file
*dwz
;
3547 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3549 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3550 if (!read_gdb_index_from_section (objfile
, objfile_name (objfile
),
3551 use_deprecated_index_sections
,
3552 &dwarf2_per_objfile
->gdb_index
, map
.get (),
3553 &cu_list
, &cu_list_elements
,
3554 &types_list
, &types_list_elements
))
3557 /* Don't use the index if it's empty. */
3558 if (map
->symbol_table
.empty ())
3561 /* If there is a .dwz file, read it so we can get its CU list as
3563 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3566 struct mapped_index dwz_map
;
3567 const gdb_byte
*dwz_types_ignore
;
3568 offset_type dwz_types_elements_ignore
;
3570 if (!read_gdb_index_from_section (objfile
,
3571 bfd_get_filename (dwz
->dwz_bfd
), 1,
3572 &dwz
->gdb_index
, &dwz_map
,
3573 &dwz_list
, &dwz_list_elements
,
3575 &dwz_types_elements_ignore
))
3577 warning (_("could not read '.gdb_index' section from %s; skipping"),
3578 bfd_get_filename (dwz
->dwz_bfd
));
3583 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3584 dwz_list
, dwz_list_elements
);
3586 if (types_list_elements
)
3588 struct dwarf2_section_info
*section
;
3590 /* We can only handle a single .debug_types when we have an
3592 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3595 section
= VEC_index (dwarf2_section_info_def
,
3596 dwarf2_per_objfile
->types
, 0);
3598 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3599 types_list
, types_list_elements
);
3602 create_addrmap_from_index (dwarf2_per_objfile
, map
.get ());
3604 dwarf2_per_objfile
->index_table
= std::move (map
);
3605 dwarf2_per_objfile
->using_index
= 1;
3606 dwarf2_per_objfile
->quick_file_names_table
=
3607 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
3612 /* die_reader_func for dw2_get_file_names. */
3615 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3616 const gdb_byte
*info_ptr
,
3617 struct die_info
*comp_unit_die
,
3621 struct dwarf2_cu
*cu
= reader
->cu
;
3622 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3623 struct dwarf2_per_objfile
*dwarf2_per_objfile
3624 = cu
->per_cu
->dwarf2_per_objfile
;
3625 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3626 struct dwarf2_per_cu_data
*lh_cu
;
3627 struct attribute
*attr
;
3630 struct quick_file_names
*qfn
;
3632 gdb_assert (! this_cu
->is_debug_types
);
3634 /* Our callers never want to match partial units -- instead they
3635 will match the enclosing full CU. */
3636 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3638 this_cu
->v
.quick
->no_file_data
= 1;
3646 sect_offset line_offset
{};
3648 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3651 struct quick_file_names find_entry
;
3653 line_offset
= (sect_offset
) DW_UNSND (attr
);
3655 /* We may have already read in this line header (TU line header sharing).
3656 If we have we're done. */
3657 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3658 find_entry
.hash
.line_sect_off
= line_offset
;
3659 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3660 &find_entry
, INSERT
);
3663 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3667 lh
= dwarf_decode_line_header (line_offset
, cu
);
3671 lh_cu
->v
.quick
->no_file_data
= 1;
3675 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3676 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3677 qfn
->hash
.line_sect_off
= line_offset
;
3678 gdb_assert (slot
!= NULL
);
3681 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3683 qfn
->num_file_names
= lh
->file_names
.size ();
3685 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->file_names
.size ());
3686 for (i
= 0; i
< lh
->file_names
.size (); ++i
)
3687 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
3688 qfn
->real_names
= NULL
;
3690 lh_cu
->v
.quick
->file_names
= qfn
;
3693 /* A helper for the "quick" functions which attempts to read the line
3694 table for THIS_CU. */
3696 static struct quick_file_names
*
3697 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3699 /* This should never be called for TUs. */
3700 gdb_assert (! this_cu
->is_debug_types
);
3701 /* Nor type unit groups. */
3702 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3704 if (this_cu
->v
.quick
->file_names
!= NULL
)
3705 return this_cu
->v
.quick
->file_names
;
3706 /* If we know there is no line data, no point in looking again. */
3707 if (this_cu
->v
.quick
->no_file_data
)
3710 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3712 if (this_cu
->v
.quick
->no_file_data
)
3714 return this_cu
->v
.quick
->file_names
;
3717 /* A helper for the "quick" functions which computes and caches the
3718 real path for a given file name from the line table. */
3721 dw2_get_real_path (struct objfile
*objfile
,
3722 struct quick_file_names
*qfn
, int index
)
3724 if (qfn
->real_names
== NULL
)
3725 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3726 qfn
->num_file_names
, const char *);
3728 if (qfn
->real_names
[index
] == NULL
)
3729 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3731 return qfn
->real_names
[index
];
3734 static struct symtab
*
3735 dw2_find_last_source_symtab (struct objfile
*objfile
)
3737 struct dwarf2_per_objfile
*dwarf2_per_objfile
3738 = get_dwarf2_per_objfile (objfile
);
3739 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->all_comp_units
.back ();
3740 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
, false);
3745 return compunit_primary_filetab (cust
);
3748 /* Traversal function for dw2_forget_cached_source_info. */
3751 dw2_free_cached_file_names (void **slot
, void *info
)
3753 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3755 if (file_data
->real_names
)
3759 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3761 xfree ((void*) file_data
->real_names
[i
]);
3762 file_data
->real_names
[i
] = NULL
;
3770 dw2_forget_cached_source_info (struct objfile
*objfile
)
3772 struct dwarf2_per_objfile
*dwarf2_per_objfile
3773 = get_dwarf2_per_objfile (objfile
);
3775 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3776 dw2_free_cached_file_names
, NULL
);
3779 /* Helper function for dw2_map_symtabs_matching_filename that expands
3780 the symtabs and calls the iterator. */
3783 dw2_map_expand_apply (struct objfile
*objfile
,
3784 struct dwarf2_per_cu_data
*per_cu
,
3785 const char *name
, const char *real_path
,
3786 gdb::function_view
<bool (symtab
*)> callback
)
3788 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3790 /* Don't visit already-expanded CUs. */
3791 if (per_cu
->v
.quick
->compunit_symtab
)
3794 /* This may expand more than one symtab, and we want to iterate over
3796 dw2_instantiate_symtab (per_cu
, false);
3798 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3799 last_made
, callback
);
3802 /* Implementation of the map_symtabs_matching_filename method. */
3805 dw2_map_symtabs_matching_filename
3806 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3807 gdb::function_view
<bool (symtab
*)> callback
)
3809 const char *name_basename
= lbasename (name
);
3810 struct dwarf2_per_objfile
*dwarf2_per_objfile
3811 = get_dwarf2_per_objfile (objfile
);
3813 /* The rule is CUs specify all the files, including those used by
3814 any TU, so there's no need to scan TUs here. */
3816 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3818 /* We only need to look at symtabs not already expanded. */
3819 if (per_cu
->v
.quick
->compunit_symtab
)
3822 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3823 if (file_data
== NULL
)
3826 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3828 const char *this_name
= file_data
->file_names
[j
];
3829 const char *this_real_name
;
3831 if (compare_filenames_for_search (this_name
, name
))
3833 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3839 /* Before we invoke realpath, which can get expensive when many
3840 files are involved, do a quick comparison of the basenames. */
3841 if (! basenames_may_differ
3842 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3845 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3846 if (compare_filenames_for_search (this_real_name
, name
))
3848 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3854 if (real_path
!= NULL
)
3856 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3857 gdb_assert (IS_ABSOLUTE_PATH (name
));
3858 if (this_real_name
!= NULL
3859 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3861 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3873 /* Struct used to manage iterating over all CUs looking for a symbol. */
3875 struct dw2_symtab_iterator
3877 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3878 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3879 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3880 int want_specific_block
;
3881 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3882 Unused if !WANT_SPECIFIC_BLOCK. */
3884 /* The kind of symbol we're looking for. */
3886 /* The list of CUs from the index entry of the symbol,
3887 or NULL if not found. */
3889 /* The next element in VEC to look at. */
3891 /* The number of elements in VEC, or zero if there is no match. */
3893 /* Have we seen a global version of the symbol?
3894 If so we can ignore all further global instances.
3895 This is to work around gold/15646, inefficient gold-generated
3900 /* Initialize the index symtab iterator ITER.
3901 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3902 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3905 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3906 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3907 int want_specific_block
,
3912 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3913 iter
->want_specific_block
= want_specific_block
;
3914 iter
->block_index
= block_index
;
3915 iter
->domain
= domain
;
3917 iter
->global_seen
= 0;
3919 mapped_index
*index
= dwarf2_per_objfile
->index_table
.get ();
3921 /* index is NULL if OBJF_READNOW. */
3922 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3923 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3931 /* Return the next matching CU or NULL if there are no more. */
3933 static struct dwarf2_per_cu_data
*
3934 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3936 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3938 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3940 offset_type cu_index_and_attrs
=
3941 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3942 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3943 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3944 /* This value is only valid for index versions >= 7. */
3945 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3946 gdb_index_symbol_kind symbol_kind
=
3947 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3948 /* Only check the symbol attributes if they're present.
3949 Indices prior to version 7 don't record them,
3950 and indices >= 7 may elide them for certain symbols
3951 (gold does this). */
3953 (dwarf2_per_objfile
->index_table
->version
>= 7
3954 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3956 /* Don't crash on bad data. */
3957 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
3958 + dwarf2_per_objfile
->all_type_units
.size ()))
3960 complaint (_(".gdb_index entry has bad CU index"
3962 objfile_name (dwarf2_per_objfile
->objfile
));
3966 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
3968 /* Skip if already read in. */
3969 if (per_cu
->v
.quick
->compunit_symtab
)
3972 /* Check static vs global. */
3975 if (iter
->want_specific_block
3976 && want_static
!= is_static
)
3978 /* Work around gold/15646. */
3979 if (!is_static
&& iter
->global_seen
)
3982 iter
->global_seen
= 1;
3985 /* Only check the symbol's kind if it has one. */
3988 switch (iter
->domain
)
3991 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3992 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3993 /* Some types are also in VAR_DOMAIN. */
3994 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3998 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4002 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4017 static struct compunit_symtab
*
4018 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
4019 const char *name
, domain_enum domain
)
4021 struct compunit_symtab
*stab_best
= NULL
;
4022 struct dwarf2_per_objfile
*dwarf2_per_objfile
4023 = get_dwarf2_per_objfile (objfile
);
4025 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
4027 struct dw2_symtab_iterator iter
;
4028 struct dwarf2_per_cu_data
*per_cu
;
4030 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 1, block_index
, domain
, name
);
4032 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4034 struct symbol
*sym
, *with_opaque
= NULL
;
4035 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
4036 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
4037 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
4039 sym
= block_find_symbol (block
, name
, domain
,
4040 block_find_non_opaque_type_preferred
,
4043 /* Some caution must be observed with overloaded functions
4044 and methods, since the index will not contain any overload
4045 information (but NAME might contain it). */
4048 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
4050 if (with_opaque
!= NULL
4051 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
4054 /* Keep looking through other CUs. */
4061 dw2_print_stats (struct objfile
*objfile
)
4063 struct dwarf2_per_objfile
*dwarf2_per_objfile
4064 = get_dwarf2_per_objfile (objfile
);
4065 int total
= (dwarf2_per_objfile
->all_comp_units
.size ()
4066 + dwarf2_per_objfile
->all_type_units
.size ());
4069 for (int i
= 0; i
< total
; ++i
)
4071 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4073 if (!per_cu
->v
.quick
->compunit_symtab
)
4076 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
4077 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
4080 /* This dumps minimal information about the index.
4081 It is called via "mt print objfiles".
4082 One use is to verify .gdb_index has been loaded by the
4083 gdb.dwarf2/gdb-index.exp testcase. */
4086 dw2_dump (struct objfile
*objfile
)
4088 struct dwarf2_per_objfile
*dwarf2_per_objfile
4089 = get_dwarf2_per_objfile (objfile
);
4091 gdb_assert (dwarf2_per_objfile
->using_index
);
4092 printf_filtered (".gdb_index:");
4093 if (dwarf2_per_objfile
->index_table
!= NULL
)
4095 printf_filtered (" version %d\n",
4096 dwarf2_per_objfile
->index_table
->version
);
4099 printf_filtered (" faked for \"readnow\"\n");
4100 printf_filtered ("\n");
4104 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
4105 const char *func_name
)
4107 struct dwarf2_per_objfile
*dwarf2_per_objfile
4108 = get_dwarf2_per_objfile (objfile
);
4110 struct dw2_symtab_iterator iter
;
4111 struct dwarf2_per_cu_data
*per_cu
;
4113 /* Note: It doesn't matter what we pass for block_index here. */
4114 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
4117 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4118 dw2_instantiate_symtab (per_cu
, false);
4123 dw2_expand_all_symtabs (struct objfile
*objfile
)
4125 struct dwarf2_per_objfile
*dwarf2_per_objfile
4126 = get_dwarf2_per_objfile (objfile
);
4127 int total_units
= (dwarf2_per_objfile
->all_comp_units
.size ()
4128 + dwarf2_per_objfile
->all_type_units
.size ());
4130 for (int i
= 0; i
< total_units
; ++i
)
4132 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4134 /* We don't want to directly expand a partial CU, because if we
4135 read it with the wrong language, then assertion failures can
4136 be triggered later on. See PR symtab/23010. So, tell
4137 dw2_instantiate_symtab to skip partial CUs -- any important
4138 partial CU will be read via DW_TAG_imported_unit anyway. */
4139 dw2_instantiate_symtab (per_cu
, true);
4144 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
4145 const char *fullname
)
4147 struct dwarf2_per_objfile
*dwarf2_per_objfile
4148 = get_dwarf2_per_objfile (objfile
);
4150 /* We don't need to consider type units here.
4151 This is only called for examining code, e.g. expand_line_sal.
4152 There can be an order of magnitude (or more) more type units
4153 than comp units, and we avoid them if we can. */
4155 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4157 /* We only need to look at symtabs not already expanded. */
4158 if (per_cu
->v
.quick
->compunit_symtab
)
4161 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4162 if (file_data
== NULL
)
4165 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4167 const char *this_fullname
= file_data
->file_names
[j
];
4169 if (filename_cmp (this_fullname
, fullname
) == 0)
4171 dw2_instantiate_symtab (per_cu
, false);
4179 dw2_map_matching_symbols (struct objfile
*objfile
,
4180 const char * name
, domain_enum domain
,
4182 int (*callback
) (struct block
*,
4183 struct symbol
*, void *),
4184 void *data
, symbol_name_match_type match
,
4185 symbol_compare_ftype
*ordered_compare
)
4187 /* Currently unimplemented; used for Ada. The function can be called if the
4188 current language is Ada for a non-Ada objfile using GNU index. As Ada
4189 does not look for non-Ada symbols this function should just return. */
4192 /* Symbol name matcher for .gdb_index names.
4194 Symbol names in .gdb_index have a few particularities:
4196 - There's no indication of which is the language of each symbol.
4198 Since each language has its own symbol name matching algorithm,
4199 and we don't know which language is the right one, we must match
4200 each symbol against all languages. This would be a potential
4201 performance problem if it were not mitigated by the
4202 mapped_index::name_components lookup table, which significantly
4203 reduces the number of times we need to call into this matcher,
4204 making it a non-issue.
4206 - Symbol names in the index have no overload (parameter)
4207 information. I.e., in C++, "foo(int)" and "foo(long)" both
4208 appear as "foo" in the index, for example.
4210 This means that the lookup names passed to the symbol name
4211 matcher functions must have no parameter information either
4212 because (e.g.) symbol search name "foo" does not match
4213 lookup-name "foo(int)" [while swapping search name for lookup
4216 class gdb_index_symbol_name_matcher
4219 /* Prepares the vector of comparison functions for LOOKUP_NAME. */
4220 gdb_index_symbol_name_matcher (const lookup_name_info
&lookup_name
);
4222 /* Walk all the matcher routines and match SYMBOL_NAME against them.
4223 Returns true if any matcher matches. */
4224 bool matches (const char *symbol_name
);
4227 /* A reference to the lookup name we're matching against. */
4228 const lookup_name_info
&m_lookup_name
;
4230 /* A vector holding all the different symbol name matchers, for all
4232 std::vector
<symbol_name_matcher_ftype
*> m_symbol_name_matcher_funcs
;
4235 gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher
4236 (const lookup_name_info
&lookup_name
)
4237 : m_lookup_name (lookup_name
)
4239 /* Prepare the vector of comparison functions upfront, to avoid
4240 doing the same work for each symbol. Care is taken to avoid
4241 matching with the same matcher more than once if/when multiple
4242 languages use the same matcher function. */
4243 auto &matchers
= m_symbol_name_matcher_funcs
;
4244 matchers
.reserve (nr_languages
);
4246 matchers
.push_back (default_symbol_name_matcher
);
4248 for (int i
= 0; i
< nr_languages
; i
++)
4250 const language_defn
*lang
= language_def ((enum language
) i
);
4251 symbol_name_matcher_ftype
*name_matcher
4252 = get_symbol_name_matcher (lang
, m_lookup_name
);
4254 /* Don't insert the same comparison routine more than once.
4255 Note that we do this linear walk instead of a seemingly
4256 cheaper sorted insert, or use a std::set or something like
4257 that, because relative order of function addresses is not
4258 stable. This is not a problem in practice because the number
4259 of supported languages is low, and the cost here is tiny
4260 compared to the number of searches we'll do afterwards using
4262 if (name_matcher
!= default_symbol_name_matcher
4263 && (std::find (matchers
.begin (), matchers
.end (), name_matcher
)
4264 == matchers
.end ()))
4265 matchers
.push_back (name_matcher
);
4270 gdb_index_symbol_name_matcher::matches (const char *symbol_name
)
4272 for (auto matches_name
: m_symbol_name_matcher_funcs
)
4273 if (matches_name (symbol_name
, m_lookup_name
, NULL
))
4279 /* Starting from a search name, return the string that finds the upper
4280 bound of all strings that start with SEARCH_NAME in a sorted name
4281 list. Returns the empty string to indicate that the upper bound is
4282 the end of the list. */
4285 make_sort_after_prefix_name (const char *search_name
)
4287 /* When looking to complete "func", we find the upper bound of all
4288 symbols that start with "func" by looking for where we'd insert
4289 the closest string that would follow "func" in lexicographical
4290 order. Usually, that's "func"-with-last-character-incremented,
4291 i.e. "fund". Mind non-ASCII characters, though. Usually those
4292 will be UTF-8 multi-byte sequences, but we can't be certain.
4293 Especially mind the 0xff character, which is a valid character in
4294 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
4295 rule out compilers allowing it in identifiers. Note that
4296 conveniently, strcmp/strcasecmp are specified to compare
4297 characters interpreted as unsigned char. So what we do is treat
4298 the whole string as a base 256 number composed of a sequence of
4299 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
4300 to 0, and carries 1 to the following more-significant position.
4301 If the very first character in SEARCH_NAME ends up incremented
4302 and carries/overflows, then the upper bound is the end of the
4303 list. The string after the empty string is also the empty
4306 Some examples of this operation:
4308 SEARCH_NAME => "+1" RESULT
4312 "\xff" "a" "\xff" => "\xff" "b"
4317 Then, with these symbols for example:
4323 completing "func" looks for symbols between "func" and
4324 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
4325 which finds "func" and "func1", but not "fund".
4329 funcÿ (Latin1 'ÿ' [0xff])
4333 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
4334 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
4338 ÿÿ (Latin1 'ÿ' [0xff])
4341 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
4342 the end of the list.
4344 std::string after
= search_name
;
4345 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
4347 if (!after
.empty ())
4348 after
.back () = (unsigned char) after
.back () + 1;
4352 /* See declaration. */
4354 std::pair
<std::vector
<name_component
>::const_iterator
,
4355 std::vector
<name_component
>::const_iterator
>
4356 mapped_index_base::find_name_components_bounds
4357 (const lookup_name_info
&lookup_name_without_params
) const
4360 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4363 = lookup_name_without_params
.cplus ().lookup_name ().c_str ();
4365 /* Comparison function object for lower_bound that matches against a
4366 given symbol name. */
4367 auto lookup_compare_lower
= [&] (const name_component
&elem
,
4370 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4371 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4372 return name_cmp (elem_name
, name
) < 0;
4375 /* Comparison function object for upper_bound that matches against a
4376 given symbol name. */
4377 auto lookup_compare_upper
= [&] (const char *name
,
4378 const name_component
&elem
)
4380 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4381 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4382 return name_cmp (name
, elem_name
) < 0;
4385 auto begin
= this->name_components
.begin ();
4386 auto end
= this->name_components
.end ();
4388 /* Find the lower bound. */
4391 if (lookup_name_without_params
.completion_mode () && cplus
[0] == '\0')
4394 return std::lower_bound (begin
, end
, cplus
, lookup_compare_lower
);
4397 /* Find the upper bound. */
4400 if (lookup_name_without_params
.completion_mode ())
4402 /* In completion mode, we want UPPER to point past all
4403 symbols names that have the same prefix. I.e., with
4404 these symbols, and completing "func":
4406 function << lower bound
4408 other_function << upper bound
4410 We find the upper bound by looking for the insertion
4411 point of "func"-with-last-character-incremented,
4413 std::string after
= make_sort_after_prefix_name (cplus
);
4416 return std::lower_bound (lower
, end
, after
.c_str (),
4417 lookup_compare_lower
);
4420 return std::upper_bound (lower
, end
, cplus
, lookup_compare_upper
);
4423 return {lower
, upper
};
4426 /* See declaration. */
4429 mapped_index_base::build_name_components ()
4431 if (!this->name_components
.empty ())
4434 this->name_components_casing
= case_sensitivity
;
4436 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4438 /* The code below only knows how to break apart components of C++
4439 symbol names (and other languages that use '::' as
4440 namespace/module separator). If we add support for wild matching
4441 to some language that uses some other operator (E.g., Ada, Go and
4442 D use '.'), then we'll need to try splitting the symbol name
4443 according to that language too. Note that Ada does support wild
4444 matching, but doesn't currently support .gdb_index. */
4445 auto count
= this->symbol_name_count ();
4446 for (offset_type idx
= 0; idx
< count
; idx
++)
4448 if (this->symbol_name_slot_invalid (idx
))
4451 const char *name
= this->symbol_name_at (idx
);
4453 /* Add each name component to the name component table. */
4454 unsigned int previous_len
= 0;
4455 for (unsigned int current_len
= cp_find_first_component (name
);
4456 name
[current_len
] != '\0';
4457 current_len
+= cp_find_first_component (name
+ current_len
))
4459 gdb_assert (name
[current_len
] == ':');
4460 this->name_components
.push_back ({previous_len
, idx
});
4461 /* Skip the '::'. */
4463 previous_len
= current_len
;
4465 this->name_components
.push_back ({previous_len
, idx
});
4468 /* Sort name_components elements by name. */
4469 auto name_comp_compare
= [&] (const name_component
&left
,
4470 const name_component
&right
)
4472 const char *left_qualified
= this->symbol_name_at (left
.idx
);
4473 const char *right_qualified
= this->symbol_name_at (right
.idx
);
4475 const char *left_name
= left_qualified
+ left
.name_offset
;
4476 const char *right_name
= right_qualified
+ right
.name_offset
;
4478 return name_cmp (left_name
, right_name
) < 0;
4481 std::sort (this->name_components
.begin (),
4482 this->name_components
.end (),
4486 /* Helper for dw2_expand_symtabs_matching that works with a
4487 mapped_index_base instead of the containing objfile. This is split
4488 to a separate function in order to be able to unit test the
4489 name_components matching using a mock mapped_index_base. For each
4490 symbol name that matches, calls MATCH_CALLBACK, passing it the
4491 symbol's index in the mapped_index_base symbol table. */
4494 dw2_expand_symtabs_matching_symbol
4495 (mapped_index_base
&index
,
4496 const lookup_name_info
&lookup_name_in
,
4497 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4498 enum search_domain kind
,
4499 gdb::function_view
<void (offset_type
)> match_callback
)
4501 lookup_name_info lookup_name_without_params
4502 = lookup_name_in
.make_ignore_params ();
4503 gdb_index_symbol_name_matcher lookup_name_matcher
4504 (lookup_name_without_params
);
4506 /* Build the symbol name component sorted vector, if we haven't
4508 index
.build_name_components ();
4510 auto bounds
= index
.find_name_components_bounds (lookup_name_without_params
);
4512 /* Now for each symbol name in range, check to see if we have a name
4513 match, and if so, call the MATCH_CALLBACK callback. */
4515 /* The same symbol may appear more than once in the range though.
4516 E.g., if we're looking for symbols that complete "w", and we have
4517 a symbol named "w1::w2", we'll find the two name components for
4518 that same symbol in the range. To be sure we only call the
4519 callback once per symbol, we first collect the symbol name
4520 indexes that matched in a temporary vector and ignore
4522 std::vector
<offset_type
> matches
;
4523 matches
.reserve (std::distance (bounds
.first
, bounds
.second
));
4525 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4527 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4529 if (!lookup_name_matcher
.matches (qualified
)
4530 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4533 matches
.push_back (bounds
.first
->idx
);
4536 std::sort (matches
.begin (), matches
.end ());
4538 /* Finally call the callback, once per match. */
4540 for (offset_type idx
: matches
)
4544 match_callback (idx
);
4549 /* Above we use a type wider than idx's for 'prev', since 0 and
4550 (offset_type)-1 are both possible values. */
4551 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4556 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4558 /* A mock .gdb_index/.debug_names-like name index table, enough to
4559 exercise dw2_expand_symtabs_matching_symbol, which works with the
4560 mapped_index_base interface. Builds an index from the symbol list
4561 passed as parameter to the constructor. */
4562 class mock_mapped_index
: public mapped_index_base
4565 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4566 : m_symbol_table (symbols
)
4569 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4571 /* Return the number of names in the symbol table. */
4572 size_t symbol_name_count () const override
4574 return m_symbol_table
.size ();
4577 /* Get the name of the symbol at IDX in the symbol table. */
4578 const char *symbol_name_at (offset_type idx
) const override
4580 return m_symbol_table
[idx
];
4584 gdb::array_view
<const char *> m_symbol_table
;
4587 /* Convenience function that converts a NULL pointer to a "<null>"
4588 string, to pass to print routines. */
4591 string_or_null (const char *str
)
4593 return str
!= NULL
? str
: "<null>";
4596 /* Check if a lookup_name_info built from
4597 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4598 index. EXPECTED_LIST is the list of expected matches, in expected
4599 matching order. If no match expected, then an empty list is
4600 specified. Returns true on success. On failure prints a warning
4601 indicating the file:line that failed, and returns false. */
4604 check_match (const char *file
, int line
,
4605 mock_mapped_index
&mock_index
,
4606 const char *name
, symbol_name_match_type match_type
,
4607 bool completion_mode
,
4608 std::initializer_list
<const char *> expected_list
)
4610 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4612 bool matched
= true;
4614 auto mismatch
= [&] (const char *expected_str
,
4617 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4618 "expected=\"%s\", got=\"%s\"\n"),
4620 (match_type
== symbol_name_match_type::FULL
4622 name
, string_or_null (expected_str
), string_or_null (got
));
4626 auto expected_it
= expected_list
.begin ();
4627 auto expected_end
= expected_list
.end ();
4629 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4631 [&] (offset_type idx
)
4633 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4634 const char *expected_str
4635 = expected_it
== expected_end
? NULL
: *expected_it
++;
4637 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4638 mismatch (expected_str
, matched_name
);
4641 const char *expected_str
4642 = expected_it
== expected_end
? NULL
: *expected_it
++;
4643 if (expected_str
!= NULL
)
4644 mismatch (expected_str
, NULL
);
4649 /* The symbols added to the mock mapped_index for testing (in
4651 static const char *test_symbols
[] = {
4660 "ns2::tmpl<int>::foo2",
4661 "(anonymous namespace)::A::B::C",
4663 /* These are used to check that the increment-last-char in the
4664 matching algorithm for completion doesn't match "t1_fund" when
4665 completing "t1_func". */
4671 /* A UTF-8 name with multi-byte sequences to make sure that
4672 cp-name-parser understands this as a single identifier ("função"
4673 is "function" in PT). */
4676 /* \377 (0xff) is Latin1 'ÿ'. */
4679 /* \377 (0xff) is Latin1 'ÿ'. */
4683 /* A name with all sorts of complications. Starts with "z" to make
4684 it easier for the completion tests below. */
4685 #define Z_SYM_NAME \
4686 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4687 "::tuple<(anonymous namespace)::ui*, " \
4688 "std::default_delete<(anonymous namespace)::ui>, void>"
4693 /* Returns true if the mapped_index_base::find_name_component_bounds
4694 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4695 in completion mode. */
4698 check_find_bounds_finds (mapped_index_base
&index
,
4699 const char *search_name
,
4700 gdb::array_view
<const char *> expected_syms
)
4702 lookup_name_info
lookup_name (search_name
,
4703 symbol_name_match_type::FULL
, true);
4705 auto bounds
= index
.find_name_components_bounds (lookup_name
);
4707 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4708 if (distance
!= expected_syms
.size ())
4711 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4713 auto nc_elem
= bounds
.first
+ exp_elem
;
4714 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4715 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4722 /* Test the lower-level mapped_index::find_name_component_bounds
4726 test_mapped_index_find_name_component_bounds ()
4728 mock_mapped_index
mock_index (test_symbols
);
4730 mock_index
.build_name_components ();
4732 /* Test the lower-level mapped_index::find_name_component_bounds
4733 method in completion mode. */
4735 static const char *expected_syms
[] = {
4740 SELF_CHECK (check_find_bounds_finds (mock_index
,
4741 "t1_func", expected_syms
));
4744 /* Check that the increment-last-char in the name matching algorithm
4745 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4747 static const char *expected_syms1
[] = {
4751 SELF_CHECK (check_find_bounds_finds (mock_index
,
4752 "\377", expected_syms1
));
4754 static const char *expected_syms2
[] = {
4757 SELF_CHECK (check_find_bounds_finds (mock_index
,
4758 "\377\377", expected_syms2
));
4762 /* Test dw2_expand_symtabs_matching_symbol. */
4765 test_dw2_expand_symtabs_matching_symbol ()
4767 mock_mapped_index
mock_index (test_symbols
);
4769 /* We let all tests run until the end even if some fails, for debug
4771 bool any_mismatch
= false;
4773 /* Create the expected symbols list (an initializer_list). Needed
4774 because lists have commas, and we need to pass them to CHECK,
4775 which is a macro. */
4776 #define EXPECT(...) { __VA_ARGS__ }
4778 /* Wrapper for check_match that passes down the current
4779 __FILE__/__LINE__. */
4780 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4781 any_mismatch |= !check_match (__FILE__, __LINE__, \
4783 NAME, MATCH_TYPE, COMPLETION_MODE, \
4786 /* Identity checks. */
4787 for (const char *sym
: test_symbols
)
4789 /* Should be able to match all existing symbols. */
4790 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4793 /* Should be able to match all existing symbols with
4795 std::string with_params
= std::string (sym
) + "(int)";
4796 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4799 /* Should be able to match all existing symbols with
4800 parameters and qualifiers. */
4801 with_params
= std::string (sym
) + " ( int ) const";
4802 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4805 /* This should really find sym, but cp-name-parser.y doesn't
4806 know about lvalue/rvalue qualifiers yet. */
4807 with_params
= std::string (sym
) + " ( int ) &&";
4808 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4812 /* Check that the name matching algorithm for completion doesn't get
4813 confused with Latin1 'ÿ' / 0xff. */
4815 static const char str
[] = "\377";
4816 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4817 EXPECT ("\377", "\377\377123"));
4820 /* Check that the increment-last-char in the matching algorithm for
4821 completion doesn't match "t1_fund" when completing "t1_func". */
4823 static const char str
[] = "t1_func";
4824 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4825 EXPECT ("t1_func", "t1_func1"));
4828 /* Check that completion mode works at each prefix of the expected
4831 static const char str
[] = "function(int)";
4832 size_t len
= strlen (str
);
4835 for (size_t i
= 1; i
< len
; i
++)
4837 lookup
.assign (str
, i
);
4838 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4839 EXPECT ("function"));
4843 /* While "w" is a prefix of both components, the match function
4844 should still only be called once. */
4846 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4848 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4852 /* Same, with a "complicated" symbol. */
4854 static const char str
[] = Z_SYM_NAME
;
4855 size_t len
= strlen (str
);
4858 for (size_t i
= 1; i
< len
; i
++)
4860 lookup
.assign (str
, i
);
4861 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4862 EXPECT (Z_SYM_NAME
));
4866 /* In FULL mode, an incomplete symbol doesn't match. */
4868 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4872 /* A complete symbol with parameters matches any overload, since the
4873 index has no overload info. */
4875 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4876 EXPECT ("std::zfunction", "std::zfunction2"));
4877 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4878 EXPECT ("std::zfunction", "std::zfunction2"));
4879 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4880 EXPECT ("std::zfunction", "std::zfunction2"));
4883 /* Check that whitespace is ignored appropriately. A symbol with a
4884 template argument list. */
4886 static const char expected
[] = "ns::foo<int>";
4887 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4889 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4893 /* Check that whitespace is ignored appropriately. A symbol with a
4894 template argument list that includes a pointer. */
4896 static const char expected
[] = "ns::foo<char*>";
4897 /* Try both completion and non-completion modes. */
4898 static const bool completion_mode
[2] = {false, true};
4899 for (size_t i
= 0; i
< 2; i
++)
4901 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4902 completion_mode
[i
], EXPECT (expected
));
4903 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4904 completion_mode
[i
], EXPECT (expected
));
4906 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4907 completion_mode
[i
], EXPECT (expected
));
4908 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4909 completion_mode
[i
], EXPECT (expected
));
4914 /* Check method qualifiers are ignored. */
4915 static const char expected
[] = "ns::foo<char*>";
4916 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4917 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4918 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4919 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4920 CHECK_MATCH ("foo < char * > ( int ) const",
4921 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4922 CHECK_MATCH ("foo < char * > ( int ) &&",
4923 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4926 /* Test lookup names that don't match anything. */
4928 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4931 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4935 /* Some wild matching tests, exercising "(anonymous namespace)",
4936 which should not be confused with a parameter list. */
4938 static const char *syms
[] = {
4942 "A :: B :: C ( int )",
4947 for (const char *s
: syms
)
4949 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4950 EXPECT ("(anonymous namespace)::A::B::C"));
4955 static const char expected
[] = "ns2::tmpl<int>::foo2";
4956 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4958 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4962 SELF_CHECK (!any_mismatch
);
4971 test_mapped_index_find_name_component_bounds ();
4972 test_dw2_expand_symtabs_matching_symbol ();
4975 }} // namespace selftests::dw2_expand_symtabs_matching
4977 #endif /* GDB_SELF_TEST */
4979 /* If FILE_MATCHER is NULL or if PER_CU has
4980 dwarf2_per_cu_quick_data::MARK set (see
4981 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4982 EXPANSION_NOTIFY on it. */
4985 dw2_expand_symtabs_matching_one
4986 (struct dwarf2_per_cu_data
*per_cu
,
4987 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4988 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4990 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4992 bool symtab_was_null
4993 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4995 dw2_instantiate_symtab (per_cu
, false);
4997 if (expansion_notify
!= NULL
4999 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
5000 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
5004 /* Helper for dw2_expand_matching symtabs. Called on each symbol
5005 matched, to expand corresponding CUs that were marked. IDX is the
5006 index of the symbol name that matched. */
5009 dw2_expand_marked_cus
5010 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
5011 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5012 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5015 offset_type
*vec
, vec_len
, vec_idx
;
5016 bool global_seen
= false;
5017 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5019 vec
= (offset_type
*) (index
.constant_pool
5020 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
5021 vec_len
= MAYBE_SWAP (vec
[0]);
5022 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
5024 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
5025 /* This value is only valid for index versions >= 7. */
5026 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
5027 gdb_index_symbol_kind symbol_kind
=
5028 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
5029 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
5030 /* Only check the symbol attributes if they're present.
5031 Indices prior to version 7 don't record them,
5032 and indices >= 7 may elide them for certain symbols
5033 (gold does this). */
5036 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
5038 /* Work around gold/15646. */
5041 if (!is_static
&& global_seen
)
5047 /* Only check the symbol's kind if it has one. */
5052 case VARIABLES_DOMAIN
:
5053 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
5056 case FUNCTIONS_DOMAIN
:
5057 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
5061 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
5069 /* Don't crash on bad data. */
5070 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
5071 + dwarf2_per_objfile
->all_type_units
.size ()))
5073 complaint (_(".gdb_index entry has bad CU index"
5075 objfile_name (dwarf2_per_objfile
->objfile
));
5079 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
5080 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5085 /* If FILE_MATCHER is non-NULL, set all the
5086 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
5087 that match FILE_MATCHER. */
5090 dw_expand_symtabs_matching_file_matcher
5091 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5092 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
5094 if (file_matcher
== NULL
)
5097 objfile
*const objfile
= dwarf2_per_objfile
->objfile
;
5099 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
5101 NULL
, xcalloc
, xfree
));
5102 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
5104 NULL
, xcalloc
, xfree
));
5106 /* The rule is CUs specify all the files, including those used by
5107 any TU, so there's no need to scan TUs here. */
5109 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5113 per_cu
->v
.quick
->mark
= 0;
5115 /* We only need to look at symtabs not already expanded. */
5116 if (per_cu
->v
.quick
->compunit_symtab
)
5119 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5120 if (file_data
== NULL
)
5123 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
5125 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
5127 per_cu
->v
.quick
->mark
= 1;
5131 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5133 const char *this_real_name
;
5135 if (file_matcher (file_data
->file_names
[j
], false))
5137 per_cu
->v
.quick
->mark
= 1;
5141 /* Before we invoke realpath, which can get expensive when many
5142 files are involved, do a quick comparison of the basenames. */
5143 if (!basenames_may_differ
5144 && !file_matcher (lbasename (file_data
->file_names
[j
]),
5148 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
5149 if (file_matcher (this_real_name
, false))
5151 per_cu
->v
.quick
->mark
= 1;
5156 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
5157 ? visited_found
.get ()
5158 : visited_not_found
.get (),
5165 dw2_expand_symtabs_matching
5166 (struct objfile
*objfile
,
5167 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5168 const lookup_name_info
&lookup_name
,
5169 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5170 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5171 enum search_domain kind
)
5173 struct dwarf2_per_objfile
*dwarf2_per_objfile
5174 = get_dwarf2_per_objfile (objfile
);
5176 /* index_table is NULL if OBJF_READNOW. */
5177 if (!dwarf2_per_objfile
->index_table
)
5180 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5182 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5184 dw2_expand_symtabs_matching_symbol (index
, lookup_name
,
5186 kind
, [&] (offset_type idx
)
5188 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
5189 expansion_notify
, kind
);
5193 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
5196 static struct compunit_symtab
*
5197 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
5202 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
5203 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
5206 if (cust
->includes
== NULL
)
5209 for (i
= 0; cust
->includes
[i
]; ++i
)
5211 struct compunit_symtab
*s
= cust
->includes
[i
];
5213 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
5221 static struct compunit_symtab
*
5222 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
5223 struct bound_minimal_symbol msymbol
,
5225 struct obj_section
*section
,
5228 struct dwarf2_per_cu_data
*data
;
5229 struct compunit_symtab
*result
;
5231 if (!objfile
->psymtabs_addrmap
)
5234 CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
5235 SECT_OFF_TEXT (objfile
));
5236 data
= (struct dwarf2_per_cu_data
*) addrmap_find (objfile
->psymtabs_addrmap
,
5241 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
5242 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
5243 paddress (get_objfile_arch (objfile
), pc
));
5246 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
,
5249 gdb_assert (result
!= NULL
);
5254 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
5255 void *data
, int need_fullname
)
5257 struct dwarf2_per_objfile
*dwarf2_per_objfile
5258 = get_dwarf2_per_objfile (objfile
);
5260 if (!dwarf2_per_objfile
->filenames_cache
)
5262 dwarf2_per_objfile
->filenames_cache
.emplace ();
5264 htab_up
visited (htab_create_alloc (10,
5265 htab_hash_pointer
, htab_eq_pointer
,
5266 NULL
, xcalloc
, xfree
));
5268 /* The rule is CUs specify all the files, including those used
5269 by any TU, so there's no need to scan TUs here. We can
5270 ignore file names coming from already-expanded CUs. */
5272 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5274 if (per_cu
->v
.quick
->compunit_symtab
)
5276 void **slot
= htab_find_slot (visited
.get (),
5277 per_cu
->v
.quick
->file_names
,
5280 *slot
= per_cu
->v
.quick
->file_names
;
5284 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5286 /* We only need to look at symtabs not already expanded. */
5287 if (per_cu
->v
.quick
->compunit_symtab
)
5290 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5291 if (file_data
== NULL
)
5294 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
5297 /* Already visited. */
5302 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5304 const char *filename
= file_data
->file_names
[j
];
5305 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
5310 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
5312 gdb::unique_xmalloc_ptr
<char> this_real_name
;
5315 this_real_name
= gdb_realpath (filename
);
5316 (*fun
) (filename
, this_real_name
.get (), data
);
5321 dw2_has_symbols (struct objfile
*objfile
)
5326 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
5329 dw2_find_last_source_symtab
,
5330 dw2_forget_cached_source_info
,
5331 dw2_map_symtabs_matching_filename
,
5335 dw2_expand_symtabs_for_function
,
5336 dw2_expand_all_symtabs
,
5337 dw2_expand_symtabs_with_fullname
,
5338 dw2_map_matching_symbols
,
5339 dw2_expand_symtabs_matching
,
5340 dw2_find_pc_sect_compunit_symtab
,
5342 dw2_map_symbol_filenames
5345 /* DWARF-5 debug_names reader. */
5347 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
5348 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
5350 /* A helper function that reads the .debug_names section in SECTION
5351 and fills in MAP. FILENAME is the name of the file containing the
5352 section; it is used for error reporting.
5354 Returns true if all went well, false otherwise. */
5357 read_debug_names_from_section (struct objfile
*objfile
,
5358 const char *filename
,
5359 struct dwarf2_section_info
*section
,
5360 mapped_debug_names
&map
)
5362 if (dwarf2_section_empty_p (section
))
5365 /* Older elfutils strip versions could keep the section in the main
5366 executable while splitting it for the separate debug info file. */
5367 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
5370 dwarf2_read_section (objfile
, section
);
5372 map
.dwarf5_byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
5374 const gdb_byte
*addr
= section
->buffer
;
5376 bfd
*const abfd
= get_section_bfd_owner (section
);
5378 unsigned int bytes_read
;
5379 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
5382 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
5383 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
5384 if (bytes_read
+ length
!= section
->size
)
5386 /* There may be multiple per-CU indices. */
5387 warning (_("Section .debug_names in %s length %s does not match "
5388 "section length %s, ignoring .debug_names."),
5389 filename
, plongest (bytes_read
+ length
),
5390 pulongest (section
->size
));
5394 /* The version number. */
5395 uint16_t version
= read_2_bytes (abfd
, addr
);
5399 warning (_("Section .debug_names in %s has unsupported version %d, "
5400 "ignoring .debug_names."),
5406 uint16_t padding
= read_2_bytes (abfd
, addr
);
5410 warning (_("Section .debug_names in %s has unsupported padding %d, "
5411 "ignoring .debug_names."),
5416 /* comp_unit_count - The number of CUs in the CU list. */
5417 map
.cu_count
= read_4_bytes (abfd
, addr
);
5420 /* local_type_unit_count - The number of TUs in the local TU
5422 map
.tu_count
= read_4_bytes (abfd
, addr
);
5425 /* foreign_type_unit_count - The number of TUs in the foreign TU
5427 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
5429 if (foreign_tu_count
!= 0)
5431 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
5432 "ignoring .debug_names."),
5433 filename
, static_cast<unsigned long> (foreign_tu_count
));
5437 /* bucket_count - The number of hash buckets in the hash lookup
5439 map
.bucket_count
= read_4_bytes (abfd
, addr
);
5442 /* name_count - The number of unique names in the index. */
5443 map
.name_count
= read_4_bytes (abfd
, addr
);
5446 /* abbrev_table_size - The size in bytes of the abbreviations
5448 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
5451 /* augmentation_string_size - The size in bytes of the augmentation
5452 string. This value is rounded up to a multiple of 4. */
5453 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
5455 map
.augmentation_is_gdb
= ((augmentation_string_size
5456 == sizeof (dwarf5_augmentation
))
5457 && memcmp (addr
, dwarf5_augmentation
,
5458 sizeof (dwarf5_augmentation
)) == 0);
5459 augmentation_string_size
+= (-augmentation_string_size
) & 3;
5460 addr
+= augmentation_string_size
;
5463 map
.cu_table_reordered
= addr
;
5464 addr
+= map
.cu_count
* map
.offset_size
;
5466 /* List of Local TUs */
5467 map
.tu_table_reordered
= addr
;
5468 addr
+= map
.tu_count
* map
.offset_size
;
5470 /* Hash Lookup Table */
5471 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5472 addr
+= map
.bucket_count
* 4;
5473 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5474 addr
+= map
.name_count
* 4;
5477 map
.name_table_string_offs_reordered
= addr
;
5478 addr
+= map
.name_count
* map
.offset_size
;
5479 map
.name_table_entry_offs_reordered
= addr
;
5480 addr
+= map
.name_count
* map
.offset_size
;
5482 const gdb_byte
*abbrev_table_start
= addr
;
5485 unsigned int bytes_read
;
5486 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5491 const auto insertpair
5492 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5493 if (!insertpair
.second
)
5495 warning (_("Section .debug_names in %s has duplicate index %s, "
5496 "ignoring .debug_names."),
5497 filename
, pulongest (index_num
));
5500 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5501 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5506 mapped_debug_names::index_val::attr attr
;
5507 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5509 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5511 if (attr
.form
== DW_FORM_implicit_const
)
5513 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5517 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5519 indexval
.attr_vec
.push_back (std::move (attr
));
5522 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5524 warning (_("Section .debug_names in %s has abbreviation_table "
5525 "of size %zu vs. written as %u, ignoring .debug_names."),
5526 filename
, addr
- abbrev_table_start
, abbrev_table_size
);
5529 map
.entry_pool
= addr
;
5534 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5538 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5539 const mapped_debug_names
&map
,
5540 dwarf2_section_info
§ion
,
5543 sect_offset sect_off_prev
;
5544 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5546 sect_offset sect_off_next
;
5547 if (i
< map
.cu_count
)
5550 = (sect_offset
) (extract_unsigned_integer
5551 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5553 map
.dwarf5_byte_order
));
5556 sect_off_next
= (sect_offset
) section
.size
;
5559 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5560 dwarf2_per_cu_data
*per_cu
5561 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5562 sect_off_prev
, length
);
5563 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5565 sect_off_prev
= sect_off_next
;
5569 /* Read the CU list from the mapped index, and use it to create all
5570 the CU objects for this dwarf2_per_objfile. */
5573 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5574 const mapped_debug_names
&map
,
5575 const mapped_debug_names
&dwz_map
)
5577 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
5578 dwarf2_per_objfile
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5580 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5581 dwarf2_per_objfile
->info
,
5582 false /* is_dwz */);
5584 if (dwz_map
.cu_count
== 0)
5587 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5588 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5592 /* Read .debug_names. If everything went ok, initialize the "quick"
5593 elements of all the CUs and return true. Otherwise, return false. */
5596 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5598 std::unique_ptr
<mapped_debug_names
> map
5599 (new mapped_debug_names (dwarf2_per_objfile
));
5600 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5601 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5603 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5604 &dwarf2_per_objfile
->debug_names
,
5608 /* Don't use the index if it's empty. */
5609 if (map
->name_count
== 0)
5612 /* If there is a .dwz file, read it so we can get its CU list as
5614 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5617 if (!read_debug_names_from_section (objfile
,
5618 bfd_get_filename (dwz
->dwz_bfd
),
5619 &dwz
->debug_names
, dwz_map
))
5621 warning (_("could not read '.debug_names' section from %s; skipping"),
5622 bfd_get_filename (dwz
->dwz_bfd
));
5627 create_cus_from_debug_names (dwarf2_per_objfile
, *map
, dwz_map
);
5629 if (map
->tu_count
!= 0)
5631 /* We can only handle a single .debug_types when we have an
5633 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
5636 dwarf2_section_info
*section
= VEC_index (dwarf2_section_info_def
,
5637 dwarf2_per_objfile
->types
, 0);
5639 create_signatured_type_table_from_debug_names
5640 (dwarf2_per_objfile
, *map
, section
, &dwarf2_per_objfile
->abbrev
);
5643 create_addrmap_from_aranges (dwarf2_per_objfile
,
5644 &dwarf2_per_objfile
->debug_aranges
);
5646 dwarf2_per_objfile
->debug_names_table
= std::move (map
);
5647 dwarf2_per_objfile
->using_index
= 1;
5648 dwarf2_per_objfile
->quick_file_names_table
=
5649 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
5654 /* Type used to manage iterating over all CUs looking for a symbol for
5657 class dw2_debug_names_iterator
5660 /* If WANT_SPECIFIC_BLOCK is true, only look for symbols in block
5661 BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
5662 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5663 bool want_specific_block
,
5664 block_enum block_index
, domain_enum domain
,
5666 : m_map (map
), m_want_specific_block (want_specific_block
),
5667 m_block_index (block_index
), m_domain (domain
),
5668 m_addr (find_vec_in_debug_names (map
, name
))
5671 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5672 search_domain search
, uint32_t namei
)
5675 m_addr (find_vec_in_debug_names (map
, namei
))
5678 /* Return the next matching CU or NULL if there are no more. */
5679 dwarf2_per_cu_data
*next ();
5682 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5684 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5687 /* The internalized form of .debug_names. */
5688 const mapped_debug_names
&m_map
;
5690 /* If true, only look for symbols that match BLOCK_INDEX. */
5691 const bool m_want_specific_block
= false;
5693 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
5694 Unused if !WANT_SPECIFIC_BLOCK - FIRST_LOCAL_BLOCK is an invalid
5696 const block_enum m_block_index
= FIRST_LOCAL_BLOCK
;
5698 /* The kind of symbol we're looking for. */
5699 const domain_enum m_domain
= UNDEF_DOMAIN
;
5700 const search_domain m_search
= ALL_DOMAIN
;
5702 /* The list of CUs from the index entry of the symbol, or NULL if
5704 const gdb_byte
*m_addr
;
5708 mapped_debug_names::namei_to_name (uint32_t namei
) const
5710 const ULONGEST namei_string_offs
5711 = extract_unsigned_integer ((name_table_string_offs_reordered
5712 + namei
* offset_size
),
5715 return read_indirect_string_at_offset
5716 (dwarf2_per_objfile
, dwarf2_per_objfile
->objfile
->obfd
, namei_string_offs
);
5719 /* Find a slot in .debug_names for the object named NAME. If NAME is
5720 found, return pointer to its pool data. If NAME cannot be found,
5724 dw2_debug_names_iterator::find_vec_in_debug_names
5725 (const mapped_debug_names
&map
, const char *name
)
5727 int (*cmp
) (const char *, const char *);
5729 if (current_language
->la_language
== language_cplus
5730 || current_language
->la_language
== language_fortran
5731 || current_language
->la_language
== language_d
)
5733 /* NAME is already canonical. Drop any qualifiers as
5734 .debug_names does not contain any. */
5736 if (strchr (name
, '(') != NULL
)
5738 gdb::unique_xmalloc_ptr
<char> without_params
5739 = cp_remove_params (name
);
5741 if (without_params
!= NULL
)
5743 name
= without_params
.get();
5748 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5750 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5752 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5753 (map
.bucket_table_reordered
5754 + (full_hash
% map
.bucket_count
)), 4,
5755 map
.dwarf5_byte_order
);
5759 if (namei
>= map
.name_count
)
5761 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5763 namei
, map
.name_count
,
5764 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5770 const uint32_t namei_full_hash
5771 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5772 (map
.hash_table_reordered
+ namei
), 4,
5773 map
.dwarf5_byte_order
);
5774 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5777 if (full_hash
== namei_full_hash
)
5779 const char *const namei_string
= map
.namei_to_name (namei
);
5781 #if 0 /* An expensive sanity check. */
5782 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5784 complaint (_("Wrong .debug_names hash for string at index %u "
5786 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5791 if (cmp (namei_string
, name
) == 0)
5793 const ULONGEST namei_entry_offs
5794 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5795 + namei
* map
.offset_size
),
5796 map
.offset_size
, map
.dwarf5_byte_order
);
5797 return map
.entry_pool
+ namei_entry_offs
;
5802 if (namei
>= map
.name_count
)
5808 dw2_debug_names_iterator::find_vec_in_debug_names
5809 (const mapped_debug_names
&map
, uint32_t namei
)
5811 if (namei
>= map
.name_count
)
5813 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5815 namei
, map
.name_count
,
5816 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5820 const ULONGEST namei_entry_offs
5821 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5822 + namei
* map
.offset_size
),
5823 map
.offset_size
, map
.dwarf5_byte_order
);
5824 return map
.entry_pool
+ namei_entry_offs
;
5827 /* See dw2_debug_names_iterator. */
5829 dwarf2_per_cu_data
*
5830 dw2_debug_names_iterator::next ()
5835 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5836 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5837 bfd
*const abfd
= objfile
->obfd
;
5841 unsigned int bytes_read
;
5842 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5843 m_addr
+= bytes_read
;
5847 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5848 if (indexval_it
== m_map
.abbrev_map
.cend ())
5850 complaint (_("Wrong .debug_names undefined abbrev code %s "
5852 pulongest (abbrev
), objfile_name (objfile
));
5855 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5856 bool have_is_static
= false;
5858 dwarf2_per_cu_data
*per_cu
= NULL
;
5859 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5864 case DW_FORM_implicit_const
:
5865 ull
= attr
.implicit_const
;
5867 case DW_FORM_flag_present
:
5871 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5872 m_addr
+= bytes_read
;
5875 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5876 dwarf_form_name (attr
.form
),
5877 objfile_name (objfile
));
5880 switch (attr
.dw_idx
)
5882 case DW_IDX_compile_unit
:
5883 /* Don't crash on bad data. */
5884 if (ull
>= dwarf2_per_objfile
->all_comp_units
.size ())
5886 complaint (_(".debug_names entry has bad CU index %s"
5889 objfile_name (dwarf2_per_objfile
->objfile
));
5892 per_cu
= dwarf2_per_objfile
->get_cutu (ull
);
5894 case DW_IDX_type_unit
:
5895 /* Don't crash on bad data. */
5896 if (ull
>= dwarf2_per_objfile
->all_type_units
.size ())
5898 complaint (_(".debug_names entry has bad TU index %s"
5901 objfile_name (dwarf2_per_objfile
->objfile
));
5904 per_cu
= &dwarf2_per_objfile
->get_tu (ull
)->per_cu
;
5906 case DW_IDX_GNU_internal
:
5907 if (!m_map
.augmentation_is_gdb
)
5909 have_is_static
= true;
5912 case DW_IDX_GNU_external
:
5913 if (!m_map
.augmentation_is_gdb
)
5915 have_is_static
= true;
5921 /* Skip if already read in. */
5922 if (per_cu
->v
.quick
->compunit_symtab
)
5925 /* Check static vs global. */
5928 const bool want_static
= m_block_index
!= GLOBAL_BLOCK
;
5929 if (m_want_specific_block
&& want_static
!= is_static
)
5933 /* Match dw2_symtab_iter_next, symbol_kind
5934 and debug_names::psymbol_tag. */
5938 switch (indexval
.dwarf_tag
)
5940 case DW_TAG_variable
:
5941 case DW_TAG_subprogram
:
5942 /* Some types are also in VAR_DOMAIN. */
5943 case DW_TAG_typedef
:
5944 case DW_TAG_structure_type
:
5951 switch (indexval
.dwarf_tag
)
5953 case DW_TAG_typedef
:
5954 case DW_TAG_structure_type
:
5961 switch (indexval
.dwarf_tag
)
5964 case DW_TAG_variable
:
5974 /* Match dw2_expand_symtabs_matching, symbol_kind and
5975 debug_names::psymbol_tag. */
5978 case VARIABLES_DOMAIN
:
5979 switch (indexval
.dwarf_tag
)
5981 case DW_TAG_variable
:
5987 case FUNCTIONS_DOMAIN
:
5988 switch (indexval
.dwarf_tag
)
5990 case DW_TAG_subprogram
:
5997 switch (indexval
.dwarf_tag
)
5999 case DW_TAG_typedef
:
6000 case DW_TAG_structure_type
:
6013 static struct compunit_symtab
*
6014 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, int block_index_int
,
6015 const char *name
, domain_enum domain
)
6017 const block_enum block_index
= static_cast<block_enum
> (block_index_int
);
6018 struct dwarf2_per_objfile
*dwarf2_per_objfile
6019 = get_dwarf2_per_objfile (objfile
);
6021 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
6024 /* index is NULL if OBJF_READNOW. */
6027 const auto &map
= *mapp
;
6029 dw2_debug_names_iterator
iter (map
, true /* want_specific_block */,
6030 block_index
, domain
, name
);
6032 struct compunit_symtab
*stab_best
= NULL
;
6033 struct dwarf2_per_cu_data
*per_cu
;
6034 while ((per_cu
= iter
.next ()) != NULL
)
6036 struct symbol
*sym
, *with_opaque
= NULL
;
6037 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
6038 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
6039 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
6041 sym
= block_find_symbol (block
, name
, domain
,
6042 block_find_non_opaque_type_preferred
,
6045 /* Some caution must be observed with overloaded functions and
6046 methods, since the index will not contain any overload
6047 information (but NAME might contain it). */
6050 && strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
6052 if (with_opaque
!= NULL
6053 && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque
), name
) == 0)
6056 /* Keep looking through other CUs. */
6062 /* This dumps minimal information about .debug_names. It is called
6063 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
6064 uses this to verify that .debug_names has been loaded. */
6067 dw2_debug_names_dump (struct objfile
*objfile
)
6069 struct dwarf2_per_objfile
*dwarf2_per_objfile
6070 = get_dwarf2_per_objfile (objfile
);
6072 gdb_assert (dwarf2_per_objfile
->using_index
);
6073 printf_filtered (".debug_names:");
6074 if (dwarf2_per_objfile
->debug_names_table
)
6075 printf_filtered (" exists\n");
6077 printf_filtered (" faked for \"readnow\"\n");
6078 printf_filtered ("\n");
6082 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
6083 const char *func_name
)
6085 struct dwarf2_per_objfile
*dwarf2_per_objfile
6086 = get_dwarf2_per_objfile (objfile
);
6088 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
6089 if (dwarf2_per_objfile
->debug_names_table
)
6091 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6093 /* Note: It doesn't matter what we pass for block_index here. */
6094 dw2_debug_names_iterator
iter (map
, false /* want_specific_block */,
6095 GLOBAL_BLOCK
, VAR_DOMAIN
, func_name
);
6097 struct dwarf2_per_cu_data
*per_cu
;
6098 while ((per_cu
= iter
.next ()) != NULL
)
6099 dw2_instantiate_symtab (per_cu
, false);
6104 dw2_debug_names_expand_symtabs_matching
6105 (struct objfile
*objfile
,
6106 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
6107 const lookup_name_info
&lookup_name
,
6108 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
6109 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
6110 enum search_domain kind
)
6112 struct dwarf2_per_objfile
*dwarf2_per_objfile
6113 = get_dwarf2_per_objfile (objfile
);
6115 /* debug_names_table is NULL if OBJF_READNOW. */
6116 if (!dwarf2_per_objfile
->debug_names_table
)
6119 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
6121 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6123 dw2_expand_symtabs_matching_symbol (map
, lookup_name
,
6125 kind
, [&] (offset_type namei
)
6127 /* The name was matched, now expand corresponding CUs that were
6129 dw2_debug_names_iterator
iter (map
, kind
, namei
);
6131 struct dwarf2_per_cu_data
*per_cu
;
6132 while ((per_cu
= iter
.next ()) != NULL
)
6133 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
6138 const struct quick_symbol_functions dwarf2_debug_names_functions
=
6141 dw2_find_last_source_symtab
,
6142 dw2_forget_cached_source_info
,
6143 dw2_map_symtabs_matching_filename
,
6144 dw2_debug_names_lookup_symbol
,
6146 dw2_debug_names_dump
,
6147 dw2_debug_names_expand_symtabs_for_function
,
6148 dw2_expand_all_symtabs
,
6149 dw2_expand_symtabs_with_fullname
,
6150 dw2_map_matching_symbols
,
6151 dw2_debug_names_expand_symtabs_matching
,
6152 dw2_find_pc_sect_compunit_symtab
,
6154 dw2_map_symbol_filenames
6157 /* See symfile.h. */
6160 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
6162 struct dwarf2_per_objfile
*dwarf2_per_objfile
6163 = get_dwarf2_per_objfile (objfile
);
6165 /* If we're about to read full symbols, don't bother with the
6166 indices. In this case we also don't care if some other debug
6167 format is making psymtabs, because they are all about to be
6169 if ((objfile
->flags
& OBJF_READNOW
))
6171 dwarf2_per_objfile
->using_index
= 1;
6172 create_all_comp_units (dwarf2_per_objfile
);
6173 create_all_type_units (dwarf2_per_objfile
);
6174 dwarf2_per_objfile
->quick_file_names_table
6175 = create_quick_file_names_table
6176 (dwarf2_per_objfile
->all_comp_units
.size ());
6178 for (int i
= 0; i
< (dwarf2_per_objfile
->all_comp_units
.size ()
6179 + dwarf2_per_objfile
->all_type_units
.size ()); ++i
)
6181 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
6183 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6184 struct dwarf2_per_cu_quick_data
);
6187 /* Return 1 so that gdb sees the "quick" functions. However,
6188 these functions will be no-ops because we will have expanded
6190 *index_kind
= dw_index_kind::GDB_INDEX
;
6194 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
6196 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6200 if (dwarf2_read_gdb_index (dwarf2_per_objfile
))
6202 *index_kind
= dw_index_kind::GDB_INDEX
;
6211 /* Build a partial symbol table. */
6214 dwarf2_build_psymtabs (struct objfile
*objfile
)
6216 struct dwarf2_per_objfile
*dwarf2_per_objfile
6217 = get_dwarf2_per_objfile (objfile
);
6219 if (objfile
->global_psymbols
.capacity () == 0
6220 && objfile
->static_psymbols
.capacity () == 0)
6221 init_psymbol_list (objfile
, 1024);
6225 /* This isn't really ideal: all the data we allocate on the
6226 objfile's obstack is still uselessly kept around. However,
6227 freeing it seems unsafe. */
6228 psymtab_discarder
psymtabs (objfile
);
6229 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
6232 CATCH (except
, RETURN_MASK_ERROR
)
6234 exception_print (gdb_stderr
, except
);
6239 /* Return the total length of the CU described by HEADER. */
6242 get_cu_length (const struct comp_unit_head
*header
)
6244 return header
->initial_length_size
+ header
->length
;
6247 /* Return TRUE if SECT_OFF is within CU_HEADER. */
6250 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
6252 sect_offset bottom
= cu_header
->sect_off
;
6253 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
6255 return sect_off
>= bottom
&& sect_off
< top
;
6258 /* Find the base address of the compilation unit for range lists and
6259 location lists. It will normally be specified by DW_AT_low_pc.
6260 In DWARF-3 draft 4, the base address could be overridden by
6261 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6262 compilation units with discontinuous ranges. */
6265 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6267 struct attribute
*attr
;
6270 cu
->base_address
= 0;
6272 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6275 cu
->base_address
= attr_value_as_address (attr
);
6280 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6283 cu
->base_address
= attr_value_as_address (attr
);
6289 /* Read in the comp unit header information from the debug_info at info_ptr.
6290 Use rcuh_kind::COMPILE as the default type if not known by the caller.
6291 NOTE: This leaves members offset, first_die_offset to be filled in
6294 static const gdb_byte
*
6295 read_comp_unit_head (struct comp_unit_head
*cu_header
,
6296 const gdb_byte
*info_ptr
,
6297 struct dwarf2_section_info
*section
,
6298 rcuh_kind section_kind
)
6301 unsigned int bytes_read
;
6302 const char *filename
= get_section_file_name (section
);
6303 bfd
*abfd
= get_section_bfd_owner (section
);
6305 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
6306 cu_header
->initial_length_size
= bytes_read
;
6307 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
6308 info_ptr
+= bytes_read
;
6309 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
6310 if (cu_header
->version
< 2 || cu_header
->version
> 5)
6311 error (_("Dwarf Error: wrong version in compilation unit header "
6312 "(is %d, should be 2, 3, 4 or 5) [in module %s]"),
6313 cu_header
->version
, filename
);
6315 if (cu_header
->version
< 5)
6316 switch (section_kind
)
6318 case rcuh_kind::COMPILE
:
6319 cu_header
->unit_type
= DW_UT_compile
;
6321 case rcuh_kind::TYPE
:
6322 cu_header
->unit_type
= DW_UT_type
;
6325 internal_error (__FILE__
, __LINE__
,
6326 _("read_comp_unit_head: invalid section_kind"));
6330 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
6331 (read_1_byte (abfd
, info_ptr
));
6333 switch (cu_header
->unit_type
)
6336 if (section_kind
!= rcuh_kind::COMPILE
)
6337 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6338 "(is DW_UT_compile, should be DW_UT_type) [in module %s]"),
6342 section_kind
= rcuh_kind::TYPE
;
6345 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6346 "(is %d, should be %d or %d) [in module %s]"),
6347 cu_header
->unit_type
, DW_UT_compile
, DW_UT_type
, filename
);
6350 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6353 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
6356 info_ptr
+= bytes_read
;
6357 if (cu_header
->version
< 5)
6359 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6362 signed_addr
= bfd_get_sign_extend_vma (abfd
);
6363 if (signed_addr
< 0)
6364 internal_error (__FILE__
, __LINE__
,
6365 _("read_comp_unit_head: dwarf from non elf file"));
6366 cu_header
->signed_addr_p
= signed_addr
;
6368 if (section_kind
== rcuh_kind::TYPE
)
6370 LONGEST type_offset
;
6372 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
6375 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
6376 info_ptr
+= bytes_read
;
6377 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
6378 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
6379 error (_("Dwarf Error: Too big type_offset in compilation unit "
6380 "header (is %s) [in module %s]"), plongest (type_offset
),
6387 /* Helper function that returns the proper abbrev section for
6390 static struct dwarf2_section_info
*
6391 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6393 struct dwarf2_section_info
*abbrev
;
6394 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6396 if (this_cu
->is_dwz
)
6397 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
6399 abbrev
= &dwarf2_per_objfile
->abbrev
;
6404 /* Subroutine of read_and_check_comp_unit_head and
6405 read_and_check_type_unit_head to simplify them.
6406 Perform various error checking on the header. */
6409 error_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6410 struct comp_unit_head
*header
,
6411 struct dwarf2_section_info
*section
,
6412 struct dwarf2_section_info
*abbrev_section
)
6414 const char *filename
= get_section_file_name (section
);
6416 if (to_underlying (header
->abbrev_sect_off
)
6417 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
6418 error (_("Dwarf Error: bad offset (%s) in compilation unit header "
6419 "(offset %s + 6) [in module %s]"),
6420 sect_offset_str (header
->abbrev_sect_off
),
6421 sect_offset_str (header
->sect_off
),
6424 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
6425 avoid potential 32-bit overflow. */
6426 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
6428 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
6429 "(offset %s + 0) [in module %s]"),
6430 header
->length
, sect_offset_str (header
->sect_off
),
6434 /* Read in a CU/TU header and perform some basic error checking.
6435 The contents of the header are stored in HEADER.
6436 The result is a pointer to the start of the first DIE. */
6438 static const gdb_byte
*
6439 read_and_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6440 struct comp_unit_head
*header
,
6441 struct dwarf2_section_info
*section
,
6442 struct dwarf2_section_info
*abbrev_section
,
6443 const gdb_byte
*info_ptr
,
6444 rcuh_kind section_kind
)
6446 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
6448 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
6450 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
6452 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
6454 error_check_comp_unit_head (dwarf2_per_objfile
, header
, section
,
6460 /* Fetch the abbreviation table offset from a comp or type unit header. */
6463 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6464 struct dwarf2_section_info
*section
,
6465 sect_offset sect_off
)
6467 bfd
*abfd
= get_section_bfd_owner (section
);
6468 const gdb_byte
*info_ptr
;
6469 unsigned int initial_length_size
, offset_size
;
6472 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
6473 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6474 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6475 offset_size
= initial_length_size
== 4 ? 4 : 8;
6476 info_ptr
+= initial_length_size
;
6478 version
= read_2_bytes (abfd
, info_ptr
);
6482 /* Skip unit type and address size. */
6486 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
6489 /* Allocate a new partial symtab for file named NAME and mark this new
6490 partial symtab as being an include of PST. */
6493 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
6494 struct objfile
*objfile
)
6496 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
6498 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6500 /* It shares objfile->objfile_obstack. */
6501 subpst
->dirname
= pst
->dirname
;
6504 subpst
->dependencies
6505 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
6506 subpst
->dependencies
[0] = pst
;
6507 subpst
->number_of_dependencies
= 1;
6509 subpst
->globals_offset
= 0;
6510 subpst
->n_global_syms
= 0;
6511 subpst
->statics_offset
= 0;
6512 subpst
->n_static_syms
= 0;
6513 subpst
->compunit_symtab
= NULL
;
6514 subpst
->read_symtab
= pst
->read_symtab
;
6517 /* No private part is necessary for include psymtabs. This property
6518 can be used to differentiate between such include psymtabs and
6519 the regular ones. */
6520 subpst
->read_symtab_private
= NULL
;
6523 /* Read the Line Number Program data and extract the list of files
6524 included by the source file represented by PST. Build an include
6525 partial symtab for each of these included files. */
6528 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6529 struct die_info
*die
,
6530 struct partial_symtab
*pst
)
6533 struct attribute
*attr
;
6535 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6537 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6539 return; /* No linetable, so no includes. */
6541 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6542 that we pass in the raw text_low here; that is ok because we're
6543 only decoding the line table to make include partial symtabs, and
6544 so the addresses aren't really used. */
6545 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6546 pst
->raw_text_low (), 1);
6550 hash_signatured_type (const void *item
)
6552 const struct signatured_type
*sig_type
6553 = (const struct signatured_type
*) item
;
6555 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6556 return sig_type
->signature
;
6560 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6562 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6563 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6565 return lhs
->signature
== rhs
->signature
;
6568 /* Allocate a hash table for signatured types. */
6571 allocate_signatured_type_table (struct objfile
*objfile
)
6573 return htab_create_alloc_ex (41,
6574 hash_signatured_type
,
6577 &objfile
->objfile_obstack
,
6578 hashtab_obstack_allocate
,
6579 dummy_obstack_deallocate
);
6582 /* A helper function to add a signatured type CU to a table. */
6585 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6587 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6588 std::vector
<signatured_type
*> *all_type_units
6589 = (std::vector
<signatured_type
*> *) datum
;
6591 all_type_units
->push_back (sigt
);
6596 /* A helper for create_debug_types_hash_table. Read types from SECTION
6597 and fill them into TYPES_HTAB. It will process only type units,
6598 therefore DW_UT_type. */
6601 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6602 struct dwo_file
*dwo_file
,
6603 dwarf2_section_info
*section
, htab_t
&types_htab
,
6604 rcuh_kind section_kind
)
6606 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6607 struct dwarf2_section_info
*abbrev_section
;
6609 const gdb_byte
*info_ptr
, *end_ptr
;
6611 abbrev_section
= (dwo_file
!= NULL
6612 ? &dwo_file
->sections
.abbrev
6613 : &dwarf2_per_objfile
->abbrev
);
6615 if (dwarf_read_debug
)
6616 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6617 get_section_name (section
),
6618 get_section_file_name (abbrev_section
));
6620 dwarf2_read_section (objfile
, section
);
6621 info_ptr
= section
->buffer
;
6623 if (info_ptr
== NULL
)
6626 /* We can't set abfd until now because the section may be empty or
6627 not present, in which case the bfd is unknown. */
6628 abfd
= get_section_bfd_owner (section
);
6630 /* We don't use init_cutu_and_read_dies_simple, or some such, here
6631 because we don't need to read any dies: the signature is in the
6634 end_ptr
= info_ptr
+ section
->size
;
6635 while (info_ptr
< end_ptr
)
6637 struct signatured_type
*sig_type
;
6638 struct dwo_unit
*dwo_tu
;
6640 const gdb_byte
*ptr
= info_ptr
;
6641 struct comp_unit_head header
;
6642 unsigned int length
;
6644 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6646 /* Initialize it due to a false compiler warning. */
6647 header
.signature
= -1;
6648 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6650 /* We need to read the type's signature in order to build the hash
6651 table, but we don't need anything else just yet. */
6653 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6654 abbrev_section
, ptr
, section_kind
);
6656 length
= get_cu_length (&header
);
6658 /* Skip dummy type units. */
6659 if (ptr
>= info_ptr
+ length
6660 || peek_abbrev_code (abfd
, ptr
) == 0
6661 || header
.unit_type
!= DW_UT_type
)
6667 if (types_htab
== NULL
)
6670 types_htab
= allocate_dwo_unit_table (objfile
);
6672 types_htab
= allocate_signatured_type_table (objfile
);
6678 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6680 dwo_tu
->dwo_file
= dwo_file
;
6681 dwo_tu
->signature
= header
.signature
;
6682 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6683 dwo_tu
->section
= section
;
6684 dwo_tu
->sect_off
= sect_off
;
6685 dwo_tu
->length
= length
;
6689 /* N.B.: type_offset is not usable if this type uses a DWO file.
6690 The real type_offset is in the DWO file. */
6692 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6693 struct signatured_type
);
6694 sig_type
->signature
= header
.signature
;
6695 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6696 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6697 sig_type
->per_cu
.is_debug_types
= 1;
6698 sig_type
->per_cu
.section
= section
;
6699 sig_type
->per_cu
.sect_off
= sect_off
;
6700 sig_type
->per_cu
.length
= length
;
6703 slot
= htab_find_slot (types_htab
,
6704 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6706 gdb_assert (slot
!= NULL
);
6709 sect_offset dup_sect_off
;
6713 const struct dwo_unit
*dup_tu
6714 = (const struct dwo_unit
*) *slot
;
6716 dup_sect_off
= dup_tu
->sect_off
;
6720 const struct signatured_type
*dup_tu
6721 = (const struct signatured_type
*) *slot
;
6723 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6726 complaint (_("debug type entry at offset %s is duplicate to"
6727 " the entry at offset %s, signature %s"),
6728 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6729 hex_string (header
.signature
));
6731 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6733 if (dwarf_read_debug
> 1)
6734 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6735 sect_offset_str (sect_off
),
6736 hex_string (header
.signature
));
6742 /* Create the hash table of all entries in the .debug_types
6743 (or .debug_types.dwo) section(s).
6744 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6745 otherwise it is NULL.
6747 The result is a pointer to the hash table or NULL if there are no types.
6749 Note: This function processes DWO files only, not DWP files. */
6752 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6753 struct dwo_file
*dwo_file
,
6754 VEC (dwarf2_section_info_def
) *types
,
6758 struct dwarf2_section_info
*section
;
6760 if (VEC_empty (dwarf2_section_info_def
, types
))
6764 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
6766 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, section
,
6767 types_htab
, rcuh_kind::TYPE
);
6770 /* Create the hash table of all entries in the .debug_types section,
6771 and initialize all_type_units.
6772 The result is zero if there is an error (e.g. missing .debug_types section),
6773 otherwise non-zero. */
6776 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6778 htab_t types_htab
= NULL
;
6780 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6781 &dwarf2_per_objfile
->info
, types_htab
,
6782 rcuh_kind::COMPILE
);
6783 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6784 dwarf2_per_objfile
->types
, types_htab
);
6785 if (types_htab
== NULL
)
6787 dwarf2_per_objfile
->signatured_types
= NULL
;
6791 dwarf2_per_objfile
->signatured_types
= types_htab
;
6793 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
6794 dwarf2_per_objfile
->all_type_units
.reserve (htab_elements (types_htab
));
6796 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
,
6797 &dwarf2_per_objfile
->all_type_units
);
6802 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6803 If SLOT is non-NULL, it is the entry to use in the hash table.
6804 Otherwise we find one. */
6806 static struct signatured_type
*
6807 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6810 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6812 if (dwarf2_per_objfile
->all_type_units
.size ()
6813 == dwarf2_per_objfile
->all_type_units
.capacity ())
6814 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6816 signatured_type
*sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6817 struct signatured_type
);
6819 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
6820 sig_type
->signature
= sig
;
6821 sig_type
->per_cu
.is_debug_types
= 1;
6822 if (dwarf2_per_objfile
->using_index
)
6824 sig_type
->per_cu
.v
.quick
=
6825 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6826 struct dwarf2_per_cu_quick_data
);
6831 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6834 gdb_assert (*slot
== NULL
);
6836 /* The rest of sig_type must be filled in by the caller. */
6840 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6841 Fill in SIG_ENTRY with DWO_ENTRY. */
6844 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6845 struct signatured_type
*sig_entry
,
6846 struct dwo_unit
*dwo_entry
)
6848 /* Make sure we're not clobbering something we don't expect to. */
6849 gdb_assert (! sig_entry
->per_cu
.queued
);
6850 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6851 if (dwarf2_per_objfile
->using_index
)
6853 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6854 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6857 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6858 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6859 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6860 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6861 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6863 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6864 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6865 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6866 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6867 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6868 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6869 sig_entry
->dwo_unit
= dwo_entry
;
6872 /* Subroutine of lookup_signatured_type.
6873 If we haven't read the TU yet, create the signatured_type data structure
6874 for a TU to be read in directly from a DWO file, bypassing the stub.
6875 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6876 using .gdb_index, then when reading a CU we want to stay in the DWO file
6877 containing that CU. Otherwise we could end up reading several other DWO
6878 files (due to comdat folding) to process the transitive closure of all the
6879 mentioned TUs, and that can be slow. The current DWO file will have every
6880 type signature that it needs.
6881 We only do this for .gdb_index because in the psymtab case we already have
6882 to read all the DWOs to build the type unit groups. */
6884 static struct signatured_type
*
6885 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6887 struct dwarf2_per_objfile
*dwarf2_per_objfile
6888 = cu
->per_cu
->dwarf2_per_objfile
;
6889 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6890 struct dwo_file
*dwo_file
;
6891 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6892 struct signatured_type find_sig_entry
, *sig_entry
;
6895 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6897 /* If TU skeletons have been removed then we may not have read in any
6899 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6901 dwarf2_per_objfile
->signatured_types
6902 = allocate_signatured_type_table (objfile
);
6905 /* We only ever need to read in one copy of a signatured type.
6906 Use the global signatured_types array to do our own comdat-folding
6907 of types. If this is the first time we're reading this TU, and
6908 the TU has an entry in .gdb_index, replace the recorded data from
6909 .gdb_index with this TU. */
6911 find_sig_entry
.signature
= sig
;
6912 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6913 &find_sig_entry
, INSERT
);
6914 sig_entry
= (struct signatured_type
*) *slot
;
6916 /* We can get here with the TU already read, *or* in the process of being
6917 read. Don't reassign the global entry to point to this DWO if that's
6918 the case. Also note that if the TU is already being read, it may not
6919 have come from a DWO, the program may be a mix of Fission-compiled
6920 code and non-Fission-compiled code. */
6922 /* Have we already tried to read this TU?
6923 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6924 needn't exist in the global table yet). */
6925 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6928 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6929 dwo_unit of the TU itself. */
6930 dwo_file
= cu
->dwo_unit
->dwo_file
;
6932 /* Ok, this is the first time we're reading this TU. */
6933 if (dwo_file
->tus
== NULL
)
6935 find_dwo_entry
.signature
= sig
;
6936 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
6937 if (dwo_entry
== NULL
)
6940 /* If the global table doesn't have an entry for this TU, add one. */
6941 if (sig_entry
== NULL
)
6942 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6944 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6945 sig_entry
->per_cu
.tu_read
= 1;
6949 /* Subroutine of lookup_signatured_type.
6950 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6951 then try the DWP file. If the TU stub (skeleton) has been removed then
6952 it won't be in .gdb_index. */
6954 static struct signatured_type
*
6955 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6957 struct dwarf2_per_objfile
*dwarf2_per_objfile
6958 = cu
->per_cu
->dwarf2_per_objfile
;
6959 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6960 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
6961 struct dwo_unit
*dwo_entry
;
6962 struct signatured_type find_sig_entry
, *sig_entry
;
6965 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6966 gdb_assert (dwp_file
!= NULL
);
6968 /* If TU skeletons have been removed then we may not have read in any
6970 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6972 dwarf2_per_objfile
->signatured_types
6973 = allocate_signatured_type_table (objfile
);
6976 find_sig_entry
.signature
= sig
;
6977 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6978 &find_sig_entry
, INSERT
);
6979 sig_entry
= (struct signatured_type
*) *slot
;
6981 /* Have we already tried to read this TU?
6982 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6983 needn't exist in the global table yet). */
6984 if (sig_entry
!= NULL
)
6987 if (dwp_file
->tus
== NULL
)
6989 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
6990 sig
, 1 /* is_debug_types */);
6991 if (dwo_entry
== NULL
)
6994 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6995 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7000 /* Lookup a signature based type for DW_FORM_ref_sig8.
7001 Returns NULL if signature SIG is not present in the table.
7002 It is up to the caller to complain about this. */
7004 static struct signatured_type
*
7005 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7007 struct dwarf2_per_objfile
*dwarf2_per_objfile
7008 = cu
->per_cu
->dwarf2_per_objfile
;
7011 && dwarf2_per_objfile
->using_index
)
7013 /* We're in a DWO/DWP file, and we're using .gdb_index.
7014 These cases require special processing. */
7015 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
7016 return lookup_dwo_signatured_type (cu
, sig
);
7018 return lookup_dwp_signatured_type (cu
, sig
);
7022 struct signatured_type find_entry
, *entry
;
7024 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7026 find_entry
.signature
= sig
;
7027 entry
= ((struct signatured_type
*)
7028 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
7033 /* Low level DIE reading support. */
7035 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
7038 init_cu_die_reader (struct die_reader_specs
*reader
,
7039 struct dwarf2_cu
*cu
,
7040 struct dwarf2_section_info
*section
,
7041 struct dwo_file
*dwo_file
,
7042 struct abbrev_table
*abbrev_table
)
7044 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
7045 reader
->abfd
= get_section_bfd_owner (section
);
7047 reader
->dwo_file
= dwo_file
;
7048 reader
->die_section
= section
;
7049 reader
->buffer
= section
->buffer
;
7050 reader
->buffer_end
= section
->buffer
+ section
->size
;
7051 reader
->comp_dir
= NULL
;
7052 reader
->abbrev_table
= abbrev_table
;
7055 /* Subroutine of init_cutu_and_read_dies to simplify it.
7056 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
7057 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
7060 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
7061 from it to the DIE in the DWO. If NULL we are skipping the stub.
7062 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
7063 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
7064 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
7065 STUB_COMP_DIR may be non-NULL.
7066 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
7067 are filled in with the info of the DIE from the DWO file.
7068 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
7069 from the dwo. Since *RESULT_READER references this abbrev table, it must be
7070 kept around for at least as long as *RESULT_READER.
7072 The result is non-zero if a valid (non-dummy) DIE was found. */
7075 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
7076 struct dwo_unit
*dwo_unit
,
7077 struct die_info
*stub_comp_unit_die
,
7078 const char *stub_comp_dir
,
7079 struct die_reader_specs
*result_reader
,
7080 const gdb_byte
**result_info_ptr
,
7081 struct die_info
**result_comp_unit_die
,
7082 int *result_has_children
,
7083 abbrev_table_up
*result_dwo_abbrev_table
)
7085 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7086 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7087 struct dwarf2_cu
*cu
= this_cu
->cu
;
7089 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7090 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
7091 int i
,num_extra_attrs
;
7092 struct dwarf2_section_info
*dwo_abbrev_section
;
7093 struct attribute
*attr
;
7094 struct die_info
*comp_unit_die
;
7096 /* At most one of these may be provided. */
7097 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
7099 /* These attributes aren't processed until later:
7100 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
7101 DW_AT_comp_dir is used now, to find the DWO file, but it is also
7102 referenced later. However, these attributes are found in the stub
7103 which we won't have later. In order to not impose this complication
7104 on the rest of the code, we read them here and copy them to the
7113 if (stub_comp_unit_die
!= NULL
)
7115 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
7117 if (! this_cu
->is_debug_types
)
7118 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
7119 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
7120 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
7121 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
7122 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
7124 /* There should be a DW_AT_addr_base attribute here (if needed).
7125 We need the value before we can process DW_FORM_GNU_addr_index. */
7127 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
7129 cu
->addr_base
= DW_UNSND (attr
);
7131 /* There should be a DW_AT_ranges_base attribute here (if needed).
7132 We need the value before we can process DW_AT_ranges. */
7133 cu
->ranges_base
= 0;
7134 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
7136 cu
->ranges_base
= DW_UNSND (attr
);
7138 else if (stub_comp_dir
!= NULL
)
7140 /* Reconstruct the comp_dir attribute to simplify the code below. */
7141 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
7142 comp_dir
->name
= DW_AT_comp_dir
;
7143 comp_dir
->form
= DW_FORM_string
;
7144 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
7145 DW_STRING (comp_dir
) = stub_comp_dir
;
7148 /* Set up for reading the DWO CU/TU. */
7149 cu
->dwo_unit
= dwo_unit
;
7150 dwarf2_section_info
*section
= dwo_unit
->section
;
7151 dwarf2_read_section (objfile
, section
);
7152 abfd
= get_section_bfd_owner (section
);
7153 begin_info_ptr
= info_ptr
= (section
->buffer
7154 + to_underlying (dwo_unit
->sect_off
));
7155 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
7157 if (this_cu
->is_debug_types
)
7159 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
7161 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7162 &cu
->header
, section
,
7164 info_ptr
, rcuh_kind::TYPE
);
7165 /* This is not an assert because it can be caused by bad debug info. */
7166 if (sig_type
->signature
!= cu
->header
.signature
)
7168 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
7169 " TU at offset %s [in module %s]"),
7170 hex_string (sig_type
->signature
),
7171 hex_string (cu
->header
.signature
),
7172 sect_offset_str (dwo_unit
->sect_off
),
7173 bfd_get_filename (abfd
));
7175 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7176 /* For DWOs coming from DWP files, we don't know the CU length
7177 nor the type's offset in the TU until now. */
7178 dwo_unit
->length
= get_cu_length (&cu
->header
);
7179 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
7181 /* Establish the type offset that can be used to lookup the type.
7182 For DWO files, we don't know it until now. */
7183 sig_type
->type_offset_in_section
7184 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
7188 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7189 &cu
->header
, section
,
7191 info_ptr
, rcuh_kind::COMPILE
);
7192 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7193 /* For DWOs coming from DWP files, we don't know the CU length
7195 dwo_unit
->length
= get_cu_length (&cu
->header
);
7198 *result_dwo_abbrev_table
7199 = abbrev_table_read_table (dwarf2_per_objfile
, dwo_abbrev_section
,
7200 cu
->header
.abbrev_sect_off
);
7201 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
7202 result_dwo_abbrev_table
->get ());
7204 /* Read in the die, but leave space to copy over the attributes
7205 from the stub. This has the benefit of simplifying the rest of
7206 the code - all the work to maintain the illusion of a single
7207 DW_TAG_{compile,type}_unit DIE is done here. */
7208 num_extra_attrs
= ((stmt_list
!= NULL
)
7212 + (comp_dir
!= NULL
));
7213 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
7214 result_has_children
, num_extra_attrs
);
7216 /* Copy over the attributes from the stub to the DIE we just read in. */
7217 comp_unit_die
= *result_comp_unit_die
;
7218 i
= comp_unit_die
->num_attrs
;
7219 if (stmt_list
!= NULL
)
7220 comp_unit_die
->attrs
[i
++] = *stmt_list
;
7222 comp_unit_die
->attrs
[i
++] = *low_pc
;
7223 if (high_pc
!= NULL
)
7224 comp_unit_die
->attrs
[i
++] = *high_pc
;
7226 comp_unit_die
->attrs
[i
++] = *ranges
;
7227 if (comp_dir
!= NULL
)
7228 comp_unit_die
->attrs
[i
++] = *comp_dir
;
7229 comp_unit_die
->num_attrs
+= num_extra_attrs
;
7231 if (dwarf_die_debug
)
7233 fprintf_unfiltered (gdb_stdlog
,
7234 "Read die from %s@0x%x of %s:\n",
7235 get_section_name (section
),
7236 (unsigned) (begin_info_ptr
- section
->buffer
),
7237 bfd_get_filename (abfd
));
7238 dump_die (comp_unit_die
, dwarf_die_debug
);
7241 /* Save the comp_dir attribute. If there is no DWP file then we'll read
7242 TUs by skipping the stub and going directly to the entry in the DWO file.
7243 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
7244 to get it via circuitous means. Blech. */
7245 if (comp_dir
!= NULL
)
7246 result_reader
->comp_dir
= DW_STRING (comp_dir
);
7248 /* Skip dummy compilation units. */
7249 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
7250 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7253 *result_info_ptr
= info_ptr
;
7257 /* Subroutine of init_cutu_and_read_dies to simplify it.
7258 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
7259 Returns NULL if the specified DWO unit cannot be found. */
7261 static struct dwo_unit
*
7262 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
7263 struct die_info
*comp_unit_die
)
7265 struct dwarf2_cu
*cu
= this_cu
->cu
;
7267 struct dwo_unit
*dwo_unit
;
7268 const char *comp_dir
, *dwo_name
;
7270 gdb_assert (cu
!= NULL
);
7272 /* Yeah, we look dwo_name up again, but it simplifies the code. */
7273 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7274 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7276 if (this_cu
->is_debug_types
)
7278 struct signatured_type
*sig_type
;
7280 /* Since this_cu is the first member of struct signatured_type,
7281 we can go from a pointer to one to a pointer to the other. */
7282 sig_type
= (struct signatured_type
*) this_cu
;
7283 signature
= sig_type
->signature
;
7284 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
7288 struct attribute
*attr
;
7290 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
7292 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
7294 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
7295 signature
= DW_UNSND (attr
);
7296 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
7303 /* Subroutine of init_cutu_and_read_dies to simplify it.
7304 See it for a description of the parameters.
7305 Read a TU directly from a DWO file, bypassing the stub. */
7308 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
7309 int use_existing_cu
, int keep
,
7310 die_reader_func_ftype
*die_reader_func
,
7313 std::unique_ptr
<dwarf2_cu
> new_cu
;
7314 struct signatured_type
*sig_type
;
7315 struct die_reader_specs reader
;
7316 const gdb_byte
*info_ptr
;
7317 struct die_info
*comp_unit_die
;
7319 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7321 /* Verify we can do the following downcast, and that we have the
7323 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
7324 sig_type
= (struct signatured_type
*) this_cu
;
7325 gdb_assert (sig_type
->dwo_unit
!= NULL
);
7327 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7329 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
7330 /* There's no need to do the rereading_dwo_cu handling that
7331 init_cutu_and_read_dies does since we don't read the stub. */
7335 /* If !use_existing_cu, this_cu->cu must be NULL. */
7336 gdb_assert (this_cu
->cu
== NULL
);
7337 new_cu
.reset (new dwarf2_cu (this_cu
));
7340 /* A future optimization, if needed, would be to use an existing
7341 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
7342 could share abbrev tables. */
7344 /* The abbreviation table used by READER, this must live at least as long as
7346 abbrev_table_up dwo_abbrev_table
;
7348 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
7349 NULL
/* stub_comp_unit_die */,
7350 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
7352 &comp_unit_die
, &has_children
,
7353 &dwo_abbrev_table
) == 0)
7359 /* All the "real" work is done here. */
7360 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7362 /* This duplicates the code in init_cutu_and_read_dies,
7363 but the alternative is making the latter more complex.
7364 This function is only for the special case of using DWO files directly:
7365 no point in overly complicating the general case just to handle this. */
7366 if (new_cu
!= NULL
&& keep
)
7368 /* Link this CU into read_in_chain. */
7369 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7370 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7371 /* The chain owns it now. */
7376 /* Initialize a CU (or TU) and read its DIEs.
7377 If the CU defers to a DWO file, read the DWO file as well.
7379 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
7380 Otherwise the table specified in the comp unit header is read in and used.
7381 This is an optimization for when we already have the abbrev table.
7383 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
7384 Otherwise, a new CU is allocated with xmalloc.
7386 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
7387 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
7389 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7390 linker) then DIE_READER_FUNC will not get called. */
7393 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
7394 struct abbrev_table
*abbrev_table
,
7395 int use_existing_cu
, int keep
,
7397 die_reader_func_ftype
*die_reader_func
,
7400 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7401 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7402 struct dwarf2_section_info
*section
= this_cu
->section
;
7403 bfd
*abfd
= get_section_bfd_owner (section
);
7404 struct dwarf2_cu
*cu
;
7405 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7406 struct die_reader_specs reader
;
7407 struct die_info
*comp_unit_die
;
7409 struct attribute
*attr
;
7410 struct signatured_type
*sig_type
= NULL
;
7411 struct dwarf2_section_info
*abbrev_section
;
7412 /* Non-zero if CU currently points to a DWO file and we need to
7413 reread it. When this happens we need to reread the skeleton die
7414 before we can reread the DWO file (this only applies to CUs, not TUs). */
7415 int rereading_dwo_cu
= 0;
7417 if (dwarf_die_debug
)
7418 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7419 this_cu
->is_debug_types
? "type" : "comp",
7420 sect_offset_str (this_cu
->sect_off
));
7422 if (use_existing_cu
)
7425 /* If we're reading a TU directly from a DWO file, including a virtual DWO
7426 file (instead of going through the stub), short-circuit all of this. */
7427 if (this_cu
->reading_dwo_directly
)
7429 /* Narrow down the scope of possibilities to have to understand. */
7430 gdb_assert (this_cu
->is_debug_types
);
7431 gdb_assert (abbrev_table
== NULL
);
7432 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
7433 die_reader_func
, data
);
7437 /* This is cheap if the section is already read in. */
7438 dwarf2_read_section (objfile
, section
);
7440 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7442 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
7444 std::unique_ptr
<dwarf2_cu
> new_cu
;
7445 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7448 /* If this CU is from a DWO file we need to start over, we need to
7449 refetch the attributes from the skeleton CU.
7450 This could be optimized by retrieving those attributes from when we
7451 were here the first time: the previous comp_unit_die was stored in
7452 comp_unit_obstack. But there's no data yet that we need this
7454 if (cu
->dwo_unit
!= NULL
)
7455 rereading_dwo_cu
= 1;
7459 /* If !use_existing_cu, this_cu->cu must be NULL. */
7460 gdb_assert (this_cu
->cu
== NULL
);
7461 new_cu
.reset (new dwarf2_cu (this_cu
));
7465 /* Get the header. */
7466 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7468 /* We already have the header, there's no need to read it in again. */
7469 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7473 if (this_cu
->is_debug_types
)
7475 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7476 &cu
->header
, section
,
7477 abbrev_section
, info_ptr
,
7480 /* Since per_cu is the first member of struct signatured_type,
7481 we can go from a pointer to one to a pointer to the other. */
7482 sig_type
= (struct signatured_type
*) this_cu
;
7483 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7484 gdb_assert (sig_type
->type_offset_in_tu
7485 == cu
->header
.type_cu_offset_in_tu
);
7486 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7488 /* LENGTH has not been set yet for type units if we're
7489 using .gdb_index. */
7490 this_cu
->length
= get_cu_length (&cu
->header
);
7492 /* Establish the type offset that can be used to lookup the type. */
7493 sig_type
->type_offset_in_section
=
7494 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7496 this_cu
->dwarf_version
= cu
->header
.version
;
7500 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7501 &cu
->header
, section
,
7504 rcuh_kind::COMPILE
);
7506 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7507 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
7508 this_cu
->dwarf_version
= cu
->header
.version
;
7512 /* Skip dummy compilation units. */
7513 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7514 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7517 /* If we don't have them yet, read the abbrevs for this compilation unit.
7518 And if we need to read them now, make sure they're freed when we're
7519 done (own the table through ABBREV_TABLE_HOLDER). */
7520 abbrev_table_up abbrev_table_holder
;
7521 if (abbrev_table
!= NULL
)
7522 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7526 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7527 cu
->header
.abbrev_sect_off
);
7528 abbrev_table
= abbrev_table_holder
.get ();
7531 /* Read the top level CU/TU die. */
7532 init_cu_die_reader (&reader
, cu
, section
, NULL
, abbrev_table
);
7533 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7535 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
7538 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7539 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7540 table from the DWO file and pass the ownership over to us. It will be
7541 referenced from READER, so we must make sure to free it after we're done
7544 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7545 DWO CU, that this test will fail (the attribute will not be present). */
7546 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7547 abbrev_table_up dwo_abbrev_table
;
7550 struct dwo_unit
*dwo_unit
;
7551 struct die_info
*dwo_comp_unit_die
;
7555 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
7556 " has children (offset %s) [in module %s]"),
7557 sect_offset_str (this_cu
->sect_off
),
7558 bfd_get_filename (abfd
));
7560 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
7561 if (dwo_unit
!= NULL
)
7563 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
7564 comp_unit_die
, NULL
,
7566 &dwo_comp_unit_die
, &has_children
,
7567 &dwo_abbrev_table
) == 0)
7572 comp_unit_die
= dwo_comp_unit_die
;
7576 /* Yikes, we couldn't find the rest of the DIE, we only have
7577 the stub. A complaint has already been logged. There's
7578 not much more we can do except pass on the stub DIE to
7579 die_reader_func. We don't want to throw an error on bad
7584 /* All of the above is setup for this call. Yikes. */
7585 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7587 /* Done, clean up. */
7588 if (new_cu
!= NULL
&& keep
)
7590 /* Link this CU into read_in_chain. */
7591 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7592 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7593 /* The chain owns it now. */
7598 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
7599 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
7600 to have already done the lookup to find the DWO file).
7602 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7603 THIS_CU->is_debug_types, but nothing else.
7605 We fill in THIS_CU->length.
7607 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7608 linker) then DIE_READER_FUNC will not get called.
7610 THIS_CU->cu is always freed when done.
7611 This is done in order to not leave THIS_CU->cu in a state where we have
7612 to care whether it refers to the "main" CU or the DWO CU. */
7615 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
7616 struct dwo_file
*dwo_file
,
7617 die_reader_func_ftype
*die_reader_func
,
7620 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7621 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7622 struct dwarf2_section_info
*section
= this_cu
->section
;
7623 bfd
*abfd
= get_section_bfd_owner (section
);
7624 struct dwarf2_section_info
*abbrev_section
;
7625 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7626 struct die_reader_specs reader
;
7627 struct die_info
*comp_unit_die
;
7630 if (dwarf_die_debug
)
7631 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7632 this_cu
->is_debug_types
? "type" : "comp",
7633 sect_offset_str (this_cu
->sect_off
));
7635 gdb_assert (this_cu
->cu
== NULL
);
7637 abbrev_section
= (dwo_file
!= NULL
7638 ? &dwo_file
->sections
.abbrev
7639 : get_abbrev_section_for_cu (this_cu
));
7641 /* This is cheap if the section is already read in. */
7642 dwarf2_read_section (objfile
, section
);
7644 struct dwarf2_cu
cu (this_cu
);
7646 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7647 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7648 &cu
.header
, section
,
7649 abbrev_section
, info_ptr
,
7650 (this_cu
->is_debug_types
7652 : rcuh_kind::COMPILE
));
7654 this_cu
->length
= get_cu_length (&cu
.header
);
7656 /* Skip dummy compilation units. */
7657 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7658 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7661 abbrev_table_up abbrev_table
7662 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7663 cu
.header
.abbrev_sect_off
);
7665 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
, abbrev_table
.get ());
7666 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7668 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7671 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
7672 does not lookup the specified DWO file.
7673 This cannot be used to read DWO files.
7675 THIS_CU->cu is always freed when done.
7676 This is done in order to not leave THIS_CU->cu in a state where we have
7677 to care whether it refers to the "main" CU or the DWO CU.
7678 We can revisit this if the data shows there's a performance issue. */
7681 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
7682 die_reader_func_ftype
*die_reader_func
,
7685 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
7688 /* Type Unit Groups.
7690 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7691 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7692 so that all types coming from the same compilation (.o file) are grouped
7693 together. A future step could be to put the types in the same symtab as
7694 the CU the types ultimately came from. */
7697 hash_type_unit_group (const void *item
)
7699 const struct type_unit_group
*tu_group
7700 = (const struct type_unit_group
*) item
;
7702 return hash_stmt_list_entry (&tu_group
->hash
);
7706 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7708 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7709 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7711 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7714 /* Allocate a hash table for type unit groups. */
7717 allocate_type_unit_groups_table (struct objfile
*objfile
)
7719 return htab_create_alloc_ex (3,
7720 hash_type_unit_group
,
7723 &objfile
->objfile_obstack
,
7724 hashtab_obstack_allocate
,
7725 dummy_obstack_deallocate
);
7728 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7729 partial symtabs. We combine several TUs per psymtab to not let the size
7730 of any one psymtab grow too big. */
7731 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7732 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7734 /* Helper routine for get_type_unit_group.
7735 Create the type_unit_group object used to hold one or more TUs. */
7737 static struct type_unit_group
*
7738 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7740 struct dwarf2_per_objfile
*dwarf2_per_objfile
7741 = cu
->per_cu
->dwarf2_per_objfile
;
7742 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7743 struct dwarf2_per_cu_data
*per_cu
;
7744 struct type_unit_group
*tu_group
;
7746 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7747 struct type_unit_group
);
7748 per_cu
= &tu_group
->per_cu
;
7749 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7751 if (dwarf2_per_objfile
->using_index
)
7753 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7754 struct dwarf2_per_cu_quick_data
);
7758 unsigned int line_offset
= to_underlying (line_offset_struct
);
7759 struct partial_symtab
*pst
;
7762 /* Give the symtab a useful name for debug purposes. */
7763 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7764 name
= string_printf ("<type_units_%d>",
7765 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7767 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7769 pst
= create_partial_symtab (per_cu
, name
.c_str ());
7773 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7774 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7779 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7780 STMT_LIST is a DW_AT_stmt_list attribute. */
7782 static struct type_unit_group
*
7783 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7785 struct dwarf2_per_objfile
*dwarf2_per_objfile
7786 = cu
->per_cu
->dwarf2_per_objfile
;
7787 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7788 struct type_unit_group
*tu_group
;
7790 unsigned int line_offset
;
7791 struct type_unit_group type_unit_group_for_lookup
;
7793 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7795 dwarf2_per_objfile
->type_unit_groups
=
7796 allocate_type_unit_groups_table (dwarf2_per_objfile
->objfile
);
7799 /* Do we need to create a new group, or can we use an existing one? */
7803 line_offset
= DW_UNSND (stmt_list
);
7804 ++tu_stats
->nr_symtab_sharers
;
7808 /* Ugh, no stmt_list. Rare, but we have to handle it.
7809 We can do various things here like create one group per TU or
7810 spread them over multiple groups to split up the expansion work.
7811 To avoid worst case scenarios (too many groups or too large groups)
7812 we, umm, group them in bunches. */
7813 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7814 | (tu_stats
->nr_stmt_less_type_units
7815 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7816 ++tu_stats
->nr_stmt_less_type_units
;
7819 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7820 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7821 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
7822 &type_unit_group_for_lookup
, INSERT
);
7825 tu_group
= (struct type_unit_group
*) *slot
;
7826 gdb_assert (tu_group
!= NULL
);
7830 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7831 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7833 ++tu_stats
->nr_symtabs
;
7839 /* Partial symbol tables. */
7841 /* Create a psymtab named NAME and assign it to PER_CU.
7843 The caller must fill in the following details:
7844 dirname, textlow, texthigh. */
7846 static struct partial_symtab
*
7847 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7849 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7850 struct partial_symtab
*pst
;
7852 pst
= start_psymtab_common (objfile
, name
, 0,
7853 objfile
->global_psymbols
,
7854 objfile
->static_psymbols
);
7856 pst
->psymtabs_addrmap_supported
= 1;
7858 /* This is the glue that links PST into GDB's symbol API. */
7859 pst
->read_symtab_private
= per_cu
;
7860 pst
->read_symtab
= dwarf2_read_symtab
;
7861 per_cu
->v
.psymtab
= pst
;
7866 /* The DATA object passed to process_psymtab_comp_unit_reader has this
7869 struct process_psymtab_comp_unit_data
7871 /* True if we are reading a DW_TAG_partial_unit. */
7873 int want_partial_unit
;
7875 /* The "pretend" language that is used if the CU doesn't declare a
7878 enum language pretend_language
;
7881 /* die_reader_func for process_psymtab_comp_unit. */
7884 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7885 const gdb_byte
*info_ptr
,
7886 struct die_info
*comp_unit_die
,
7890 struct dwarf2_cu
*cu
= reader
->cu
;
7891 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7892 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7893 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7895 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7896 struct partial_symtab
*pst
;
7897 enum pc_bounds_kind cu_bounds_kind
;
7898 const char *filename
;
7899 struct process_psymtab_comp_unit_data
*info
7900 = (struct process_psymtab_comp_unit_data
*) data
;
7902 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
7905 gdb_assert (! per_cu
->is_debug_types
);
7907 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
7909 /* Allocate a new partial symbol table structure. */
7910 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7911 if (filename
== NULL
)
7914 pst
= create_partial_symtab (per_cu
, filename
);
7916 /* This must be done before calling dwarf2_build_include_psymtabs. */
7917 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7919 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7921 dwarf2_find_base_address (comp_unit_die
, cu
);
7923 /* Possibly set the default values of LOWPC and HIGHPC from
7925 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7926 &best_highpc
, cu
, pst
);
7927 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7930 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
7933 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
7935 /* Store the contiguous range if it is not empty; it can be
7936 empty for CUs with no code. */
7937 addrmap_set_empty (objfile
->psymtabs_addrmap
, low
, high
, pst
);
7940 /* Check if comp unit has_children.
7941 If so, read the rest of the partial symbols from this comp unit.
7942 If not, there's no more debug_info for this comp unit. */
7945 struct partial_die_info
*first_die
;
7946 CORE_ADDR lowpc
, highpc
;
7948 lowpc
= ((CORE_ADDR
) -1);
7949 highpc
= ((CORE_ADDR
) 0);
7951 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7953 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7954 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7956 /* If we didn't find a lowpc, set it to highpc to avoid
7957 complaints from `maint check'. */
7958 if (lowpc
== ((CORE_ADDR
) -1))
7961 /* If the compilation unit didn't have an explicit address range,
7962 then use the information extracted from its child dies. */
7963 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7966 best_highpc
= highpc
;
7969 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
7970 best_lowpc
+ baseaddr
)
7972 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
7973 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
->text_low (objfile
)),
8012 paddress (gdbarch
, pst
->text_high (objfile
)),
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
)
8807 if (pdi
->is_external
|| cu
->language
== language_ada
)
8809 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
8810 of the global scope. But in Ada, we want to be able to access
8811 nested procedures globally. So all Ada subprograms are stored
8812 in the global scope. */
8813 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8814 built_actual_name
!= NULL
,
8815 VAR_DOMAIN
, LOC_BLOCK
,
8816 SECT_OFF_TEXT (objfile
),
8817 &objfile
->global_psymbols
,
8819 cu
->language
, objfile
);
8823 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8824 built_actual_name
!= NULL
,
8825 VAR_DOMAIN
, LOC_BLOCK
,
8826 SECT_OFF_TEXT (objfile
),
8827 &objfile
->static_psymbols
,
8828 addr
, cu
->language
, objfile
);
8831 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8832 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8834 case DW_TAG_constant
:
8836 std::vector
<partial_symbol
*> *list
;
8838 if (pdi
->is_external
)
8839 list
= &objfile
->global_psymbols
;
8841 list
= &objfile
->static_psymbols
;
8842 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8843 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
8844 -1, list
, 0, cu
->language
, objfile
);
8847 case DW_TAG_variable
:
8849 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8853 && !dwarf2_per_objfile
->has_section_at_zero
)
8855 /* A global or static variable may also have been stripped
8856 out by the linker if unused, in which case its address
8857 will be nullified; do not add such variables into partial
8858 symbol table then. */
8860 else if (pdi
->is_external
)
8863 Don't enter into the minimal symbol tables as there is
8864 a minimal symbol table entry from the ELF symbols already.
8865 Enter into partial symbol table if it has a location
8866 descriptor or a type.
8867 If the location descriptor is missing, new_symbol will create
8868 a LOC_UNRESOLVED symbol, the address of the variable will then
8869 be determined from the minimal symbol table whenever the variable
8871 The address for the partial symbol table entry is not
8872 used by GDB, but it comes in handy for debugging partial symbol
8875 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8876 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8877 built_actual_name
!= NULL
,
8878 VAR_DOMAIN
, LOC_STATIC
,
8879 SECT_OFF_TEXT (objfile
),
8880 &objfile
->global_psymbols
,
8881 addr
, cu
->language
, objfile
);
8885 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8887 /* Static Variable. Skip symbols whose value we cannot know (those
8888 without location descriptors or constant values). */
8889 if (!has_loc
&& !pdi
->has_const_value
)
8891 xfree (built_actual_name
);
8895 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8896 built_actual_name
!= NULL
,
8897 VAR_DOMAIN
, LOC_STATIC
,
8898 SECT_OFF_TEXT (objfile
),
8899 &objfile
->static_psymbols
,
8901 cu
->language
, objfile
);
8904 case DW_TAG_typedef
:
8905 case DW_TAG_base_type
:
8906 case DW_TAG_subrange_type
:
8907 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8908 built_actual_name
!= NULL
,
8909 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
8910 &objfile
->static_psymbols
,
8911 0, cu
->language
, objfile
);
8913 case DW_TAG_imported_declaration
:
8914 case DW_TAG_namespace
:
8915 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8916 built_actual_name
!= NULL
,
8917 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
8918 &objfile
->global_psymbols
,
8919 0, cu
->language
, objfile
);
8922 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8923 built_actual_name
!= NULL
,
8924 MODULE_DOMAIN
, LOC_TYPEDEF
, -1,
8925 &objfile
->global_psymbols
,
8926 0, cu
->language
, objfile
);
8928 case DW_TAG_class_type
:
8929 case DW_TAG_interface_type
:
8930 case DW_TAG_structure_type
:
8931 case DW_TAG_union_type
:
8932 case DW_TAG_enumeration_type
:
8933 /* Skip external references. The DWARF standard says in the section
8934 about "Structure, Union, and Class Type Entries": "An incomplete
8935 structure, union or class type is represented by a structure,
8936 union or class entry that does not have a byte size attribute
8937 and that has a DW_AT_declaration attribute." */
8938 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8940 xfree (built_actual_name
);
8944 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8945 static vs. global. */
8946 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8947 built_actual_name
!= NULL
,
8948 STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
8949 cu
->language
== language_cplus
8950 ? &objfile
->global_psymbols
8951 : &objfile
->static_psymbols
,
8952 0, cu
->language
, objfile
);
8955 case DW_TAG_enumerator
:
8956 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8957 built_actual_name
!= NULL
,
8958 VAR_DOMAIN
, LOC_CONST
, -1,
8959 cu
->language
== language_cplus
8960 ? &objfile
->global_psymbols
8961 : &objfile
->static_psymbols
,
8962 0, cu
->language
, objfile
);
8968 xfree (built_actual_name
);
8971 /* Read a partial die corresponding to a namespace; also, add a symbol
8972 corresponding to that namespace to the symbol table. NAMESPACE is
8973 the name of the enclosing namespace. */
8976 add_partial_namespace (struct partial_die_info
*pdi
,
8977 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8978 int set_addrmap
, struct dwarf2_cu
*cu
)
8980 /* Add a symbol for the namespace. */
8982 add_partial_symbol (pdi
, cu
);
8984 /* Now scan partial symbols in that namespace. */
8986 if (pdi
->has_children
)
8987 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8990 /* Read a partial die corresponding to a Fortran module. */
8993 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
8994 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
8996 /* Add a symbol for the namespace. */
8998 add_partial_symbol (pdi
, cu
);
9000 /* Now scan partial symbols in that module. */
9002 if (pdi
->has_children
)
9003 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9006 /* Read a partial die corresponding to a subprogram or an inlined
9007 subprogram and create a partial symbol for that subprogram.
9008 When the CU language allows it, this routine also defines a partial
9009 symbol for each nested subprogram that this subprogram contains.
9010 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
9011 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
9013 PDI may also be a lexical block, in which case we simply search
9014 recursively for subprograms defined inside that lexical block.
9015 Again, this is only performed when the CU language allows this
9016 type of definitions. */
9019 add_partial_subprogram (struct partial_die_info
*pdi
,
9020 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9021 int set_addrmap
, struct dwarf2_cu
*cu
)
9023 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
9025 if (pdi
->has_pc_info
)
9027 if (pdi
->lowpc
< *lowpc
)
9028 *lowpc
= pdi
->lowpc
;
9029 if (pdi
->highpc
> *highpc
)
9030 *highpc
= pdi
->highpc
;
9033 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9034 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9039 baseaddr
= ANOFFSET (objfile
->section_offsets
,
9040 SECT_OFF_TEXT (objfile
));
9041 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
9042 pdi
->lowpc
+ baseaddr
)
9044 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
9045 pdi
->highpc
+ baseaddr
)
9047 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
9048 cu
->per_cu
->v
.psymtab
);
9052 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
9054 if (!pdi
->is_declaration
)
9055 /* Ignore subprogram DIEs that do not have a name, they are
9056 illegal. Do not emit a complaint at this point, we will
9057 do so when we convert this psymtab into a symtab. */
9059 add_partial_symbol (pdi
, cu
);
9063 if (! pdi
->has_children
)
9066 if (cu
->language
== language_ada
)
9068 pdi
= pdi
->die_child
;
9072 if (pdi
->tag
== DW_TAG_subprogram
9073 || pdi
->tag
== DW_TAG_inlined_subroutine
9074 || pdi
->tag
== DW_TAG_lexical_block
)
9075 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
9076 pdi
= pdi
->die_sibling
;
9081 /* Read a partial die corresponding to an enumeration type. */
9084 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
9085 struct dwarf2_cu
*cu
)
9087 struct partial_die_info
*pdi
;
9089 if (enum_pdi
->name
!= NULL
)
9090 add_partial_symbol (enum_pdi
, cu
);
9092 pdi
= enum_pdi
->die_child
;
9095 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
9096 complaint (_("malformed enumerator DIE ignored"));
9098 add_partial_symbol (pdi
, cu
);
9099 pdi
= pdi
->die_sibling
;
9103 /* Return the initial uleb128 in the die at INFO_PTR. */
9106 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
9108 unsigned int bytes_read
;
9110 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9113 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
9114 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
9116 Return the corresponding abbrev, or NULL if the number is zero (indicating
9117 an empty DIE). In either case *BYTES_READ will be set to the length of
9118 the initial number. */
9120 static struct abbrev_info
*
9121 peek_die_abbrev (const die_reader_specs
&reader
,
9122 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
9124 dwarf2_cu
*cu
= reader
.cu
;
9125 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
9126 unsigned int abbrev_number
9127 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
9129 if (abbrev_number
== 0)
9132 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
9135 error (_("Dwarf Error: Could not find abbrev number %d in %s"
9136 " at offset %s [in module %s]"),
9137 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
9138 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
9144 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9145 Returns a pointer to the end of a series of DIEs, terminated by an empty
9146 DIE. Any children of the skipped DIEs will also be skipped. */
9148 static const gdb_byte
*
9149 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
9153 unsigned int bytes_read
;
9154 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
9157 return info_ptr
+ bytes_read
;
9159 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
9163 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9164 INFO_PTR should point just after the initial uleb128 of a DIE, and the
9165 abbrev corresponding to that skipped uleb128 should be passed in
9166 ABBREV. Returns a pointer to this DIE's sibling, skipping any
9169 static const gdb_byte
*
9170 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
9171 struct abbrev_info
*abbrev
)
9173 unsigned int bytes_read
;
9174 struct attribute attr
;
9175 bfd
*abfd
= reader
->abfd
;
9176 struct dwarf2_cu
*cu
= reader
->cu
;
9177 const gdb_byte
*buffer
= reader
->buffer
;
9178 const gdb_byte
*buffer_end
= reader
->buffer_end
;
9179 unsigned int form
, i
;
9181 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
9183 /* The only abbrev we care about is DW_AT_sibling. */
9184 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
9186 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
9187 if (attr
.form
== DW_FORM_ref_addr
)
9188 complaint (_("ignoring absolute DW_AT_sibling"));
9191 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
9192 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
9194 if (sibling_ptr
< info_ptr
)
9195 complaint (_("DW_AT_sibling points backwards"));
9196 else if (sibling_ptr
> reader
->buffer_end
)
9197 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
9203 /* If it isn't DW_AT_sibling, skip this attribute. */
9204 form
= abbrev
->attrs
[i
].form
;
9208 case DW_FORM_ref_addr
:
9209 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
9210 and later it is offset sized. */
9211 if (cu
->header
.version
== 2)
9212 info_ptr
+= cu
->header
.addr_size
;
9214 info_ptr
+= cu
->header
.offset_size
;
9216 case DW_FORM_GNU_ref_alt
:
9217 info_ptr
+= cu
->header
.offset_size
;
9220 info_ptr
+= cu
->header
.addr_size
;
9227 case DW_FORM_flag_present
:
9228 case DW_FORM_implicit_const
:
9240 case DW_FORM_ref_sig8
:
9243 case DW_FORM_data16
:
9246 case DW_FORM_string
:
9247 read_direct_string (abfd
, info_ptr
, &bytes_read
);
9248 info_ptr
+= bytes_read
;
9250 case DW_FORM_sec_offset
:
9252 case DW_FORM_GNU_strp_alt
:
9253 info_ptr
+= cu
->header
.offset_size
;
9255 case DW_FORM_exprloc
:
9257 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9258 info_ptr
+= bytes_read
;
9260 case DW_FORM_block1
:
9261 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
9263 case DW_FORM_block2
:
9264 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
9266 case DW_FORM_block4
:
9267 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
9271 case DW_FORM_ref_udata
:
9272 case DW_FORM_GNU_addr_index
:
9273 case DW_FORM_GNU_str_index
:
9274 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
9276 case DW_FORM_indirect
:
9277 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9278 info_ptr
+= bytes_read
;
9279 /* We need to continue parsing from here, so just go back to
9281 goto skip_attribute
;
9284 error (_("Dwarf Error: Cannot handle %s "
9285 "in DWARF reader [in module %s]"),
9286 dwarf_form_name (form
),
9287 bfd_get_filename (abfd
));
9291 if (abbrev
->has_children
)
9292 return skip_children (reader
, info_ptr
);
9297 /* Locate ORIG_PDI's sibling.
9298 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
9300 static const gdb_byte
*
9301 locate_pdi_sibling (const struct die_reader_specs
*reader
,
9302 struct partial_die_info
*orig_pdi
,
9303 const gdb_byte
*info_ptr
)
9305 /* Do we know the sibling already? */
9307 if (orig_pdi
->sibling
)
9308 return orig_pdi
->sibling
;
9310 /* Are there any children to deal with? */
9312 if (!orig_pdi
->has_children
)
9315 /* Skip the children the long way. */
9317 return skip_children (reader
, info_ptr
);
9320 /* Expand this partial symbol table into a full symbol table. SELF is
9324 dwarf2_read_symtab (struct partial_symtab
*self
,
9325 struct objfile
*objfile
)
9327 struct dwarf2_per_objfile
*dwarf2_per_objfile
9328 = get_dwarf2_per_objfile (objfile
);
9332 warning (_("bug: psymtab for %s is already read in."),
9339 printf_filtered (_("Reading in symbols for %s..."),
9341 gdb_flush (gdb_stdout
);
9344 /* If this psymtab is constructed from a debug-only objfile, the
9345 has_section_at_zero flag will not necessarily be correct. We
9346 can get the correct value for this flag by looking at the data
9347 associated with the (presumably stripped) associated objfile. */
9348 if (objfile
->separate_debug_objfile_backlink
)
9350 struct dwarf2_per_objfile
*dpo_backlink
9351 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
9353 dwarf2_per_objfile
->has_section_at_zero
9354 = dpo_backlink
->has_section_at_zero
;
9357 dwarf2_per_objfile
->reading_partial_symbols
= 0;
9359 psymtab_to_symtab_1 (self
);
9361 /* Finish up the debug error message. */
9363 printf_filtered (_("done.\n"));
9366 process_cu_includes (dwarf2_per_objfile
);
9369 /* Reading in full CUs. */
9371 /* Add PER_CU to the queue. */
9374 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9375 enum language pretend_language
)
9377 struct dwarf2_queue_item
*item
;
9380 item
= XNEW (struct dwarf2_queue_item
);
9381 item
->per_cu
= per_cu
;
9382 item
->pretend_language
= pretend_language
;
9385 if (dwarf2_queue
== NULL
)
9386 dwarf2_queue
= item
;
9388 dwarf2_queue_tail
->next
= item
;
9390 dwarf2_queue_tail
= item
;
9393 /* If PER_CU is not yet queued, add it to the queue.
9394 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
9396 The result is non-zero if PER_CU was queued, otherwise the result is zero
9397 meaning either PER_CU is already queued or it is already loaded.
9399 N.B. There is an invariant here that if a CU is queued then it is loaded.
9400 The caller is required to load PER_CU if we return non-zero. */
9403 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
9404 struct dwarf2_per_cu_data
*per_cu
,
9405 enum language pretend_language
)
9407 /* We may arrive here during partial symbol reading, if we need full
9408 DIEs to process an unusual case (e.g. template arguments). Do
9409 not queue PER_CU, just tell our caller to load its DIEs. */
9410 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
9412 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
9417 /* Mark the dependence relation so that we don't flush PER_CU
9419 if (dependent_cu
!= NULL
)
9420 dwarf2_add_dependence (dependent_cu
, per_cu
);
9422 /* If it's already on the queue, we have nothing to do. */
9426 /* If the compilation unit is already loaded, just mark it as
9428 if (per_cu
->cu
!= NULL
)
9430 per_cu
->cu
->last_used
= 0;
9434 /* Add it to the queue. */
9435 queue_comp_unit (per_cu
, pretend_language
);
9440 /* Process the queue. */
9443 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9445 struct dwarf2_queue_item
*item
, *next_item
;
9447 if (dwarf_read_debug
)
9449 fprintf_unfiltered (gdb_stdlog
,
9450 "Expanding one or more symtabs of objfile %s ...\n",
9451 objfile_name (dwarf2_per_objfile
->objfile
));
9454 /* The queue starts out with one item, but following a DIE reference
9455 may load a new CU, adding it to the end of the queue. */
9456 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
9458 if ((dwarf2_per_objfile
->using_index
9459 ? !item
->per_cu
->v
.quick
->compunit_symtab
9460 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
9461 /* Skip dummy CUs. */
9462 && item
->per_cu
->cu
!= NULL
)
9464 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
9465 unsigned int debug_print_threshold
;
9468 if (per_cu
->is_debug_types
)
9470 struct signatured_type
*sig_type
=
9471 (struct signatured_type
*) per_cu
;
9473 sprintf (buf
, "TU %s at offset %s",
9474 hex_string (sig_type
->signature
),
9475 sect_offset_str (per_cu
->sect_off
));
9476 /* There can be 100s of TUs.
9477 Only print them in verbose mode. */
9478 debug_print_threshold
= 2;
9482 sprintf (buf
, "CU at offset %s",
9483 sect_offset_str (per_cu
->sect_off
));
9484 debug_print_threshold
= 1;
9487 if (dwarf_read_debug
>= debug_print_threshold
)
9488 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
9490 if (per_cu
->is_debug_types
)
9491 process_full_type_unit (per_cu
, item
->pretend_language
);
9493 process_full_comp_unit (per_cu
, item
->pretend_language
);
9495 if (dwarf_read_debug
>= debug_print_threshold
)
9496 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
9499 item
->per_cu
->queued
= 0;
9500 next_item
= item
->next
;
9504 dwarf2_queue_tail
= NULL
;
9506 if (dwarf_read_debug
)
9508 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
9509 objfile_name (dwarf2_per_objfile
->objfile
));
9513 /* Read in full symbols for PST, and anything it depends on. */
9516 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
9518 struct dwarf2_per_cu_data
*per_cu
;
9524 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
9525 if (!pst
->dependencies
[i
]->readin
9526 && pst
->dependencies
[i
]->user
== NULL
)
9528 /* Inform about additional files that need to be read in. */
9531 /* FIXME: i18n: Need to make this a single string. */
9532 fputs_filtered (" ", gdb_stdout
);
9534 fputs_filtered ("and ", gdb_stdout
);
9536 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
9537 wrap_here (""); /* Flush output. */
9538 gdb_flush (gdb_stdout
);
9540 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
9543 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
9547 /* It's an include file, no symbols to read for it.
9548 Everything is in the parent symtab. */
9553 dw2_do_instantiate_symtab (per_cu
, false);
9556 /* Trivial hash function for die_info: the hash value of a DIE
9557 is its offset in .debug_info for this objfile. */
9560 die_hash (const void *item
)
9562 const struct die_info
*die
= (const struct die_info
*) item
;
9564 return to_underlying (die
->sect_off
);
9567 /* Trivial comparison function for die_info structures: two DIEs
9568 are equal if they have the same offset. */
9571 die_eq (const void *item_lhs
, const void *item_rhs
)
9573 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9574 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9576 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9579 /* die_reader_func for load_full_comp_unit.
9580 This is identical to read_signatured_type_reader,
9581 but is kept separate for now. */
9584 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
9585 const gdb_byte
*info_ptr
,
9586 struct die_info
*comp_unit_die
,
9590 struct dwarf2_cu
*cu
= reader
->cu
;
9591 enum language
*language_ptr
= (enum language
*) data
;
9593 gdb_assert (cu
->die_hash
== NULL
);
9595 htab_create_alloc_ex (cu
->header
.length
/ 12,
9599 &cu
->comp_unit_obstack
,
9600 hashtab_obstack_allocate
,
9601 dummy_obstack_deallocate
);
9604 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
9605 &info_ptr
, comp_unit_die
);
9606 cu
->dies
= comp_unit_die
;
9607 /* comp_unit_die is not stored in die_hash, no need. */
9609 /* We try not to read any attributes in this function, because not
9610 all CUs needed for references have been loaded yet, and symbol
9611 table processing isn't initialized. But we have to set the CU language,
9612 or we won't be able to build types correctly.
9613 Similarly, if we do not read the producer, we can not apply
9614 producer-specific interpretation. */
9615 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
9618 /* Load the DIEs associated with PER_CU into memory. */
9621 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9623 enum language pretend_language
)
9625 gdb_assert (! this_cu
->is_debug_types
);
9627 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1, skip_partial
,
9628 load_full_comp_unit_reader
, &pretend_language
);
9631 /* Add a DIE to the delayed physname list. */
9634 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9635 const char *name
, struct die_info
*die
,
9636 struct dwarf2_cu
*cu
)
9638 struct delayed_method_info mi
;
9640 mi
.fnfield_index
= fnfield_index
;
9644 cu
->method_list
.push_back (mi
);
9647 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9648 "const" / "volatile". If so, decrements LEN by the length of the
9649 modifier and return true. Otherwise return false. */
9653 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9655 size_t mod_len
= sizeof (mod
) - 1;
9656 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9664 /* Compute the physnames of any methods on the CU's method list.
9666 The computation of method physnames is delayed in order to avoid the
9667 (bad) condition that one of the method's formal parameters is of an as yet
9671 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9673 /* Only C++ delays computing physnames. */
9674 if (cu
->method_list
.empty ())
9676 gdb_assert (cu
->language
== language_cplus
);
9678 for (const delayed_method_info
&mi
: cu
->method_list
)
9680 const char *physname
;
9681 struct fn_fieldlist
*fn_flp
9682 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9683 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9684 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9685 = physname
? physname
: "";
9687 /* Since there's no tag to indicate whether a method is a
9688 const/volatile overload, extract that information out of the
9690 if (physname
!= NULL
)
9692 size_t len
= strlen (physname
);
9696 if (physname
[len
] == ')') /* shortcut */
9698 else if (check_modifier (physname
, len
, " const"))
9699 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9700 else if (check_modifier (physname
, len
, " volatile"))
9701 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9708 /* The list is no longer needed. */
9709 cu
->method_list
.clear ();
9712 /* A wrapper for add_symbol_to_list to ensure that SYMBOL's language is
9713 the same as all other symbols in LISTHEAD. If a new symbol is added
9714 with a different language, this function asserts. */
9717 dw2_add_symbol_to_list (struct symbol
*symbol
, struct pending
**listhead
)
9719 /* Only assert if LISTHEAD already contains symbols of a different
9720 language (dict_create_hashed/insert_symbol_hashed requires that all
9721 symbols in this list are of the same language). */
9722 gdb_assert ((*listhead
) == NULL
9723 || (SYMBOL_LANGUAGE ((*listhead
)->symbol
[0])
9724 == SYMBOL_LANGUAGE (symbol
)));
9726 add_symbol_to_list (symbol
, listhead
);
9729 /* Go objects should be embedded in a DW_TAG_module DIE,
9730 and it's not clear if/how imported objects will appear.
9731 To keep Go support simple until that's worked out,
9732 go back through what we've read and create something usable.
9733 We could do this while processing each DIE, and feels kinda cleaner,
9734 but that way is more invasive.
9735 This is to, for example, allow the user to type "p var" or "b main"
9736 without having to specify the package name, and allow lookups
9737 of module.object to work in contexts that use the expression
9741 fixup_go_packaging (struct dwarf2_cu
*cu
)
9743 char *package_name
= NULL
;
9744 struct pending
*list
;
9747 for (list
= *cu
->builder
->get_global_symbols ();
9751 for (i
= 0; i
< list
->nsyms
; ++i
)
9753 struct symbol
*sym
= list
->symbol
[i
];
9755 if (SYMBOL_LANGUAGE (sym
) == language_go
9756 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9758 char *this_package_name
= go_symbol_package_name (sym
);
9760 if (this_package_name
== NULL
)
9762 if (package_name
== NULL
)
9763 package_name
= this_package_name
;
9766 struct objfile
*objfile
9767 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9768 if (strcmp (package_name
, this_package_name
) != 0)
9769 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9770 (symbol_symtab (sym
) != NULL
9771 ? symtab_to_filename_for_display
9772 (symbol_symtab (sym
))
9773 : objfile_name (objfile
)),
9774 this_package_name
, package_name
);
9775 xfree (this_package_name
);
9781 if (package_name
!= NULL
)
9783 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9784 const char *saved_package_name
9785 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
9787 strlen (package_name
));
9788 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9789 saved_package_name
);
9792 sym
= allocate_symbol (objfile
);
9793 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
9794 SYMBOL_SET_NAMES (sym
, saved_package_name
,
9795 strlen (saved_package_name
), 0, objfile
);
9796 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9797 e.g., "main" finds the "main" module and not C's main(). */
9798 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9799 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9800 SYMBOL_TYPE (sym
) = type
;
9802 dw2_add_symbol_to_list (sym
, cu
->builder
->get_global_symbols ());
9804 xfree (package_name
);
9808 /* Allocate a fully-qualified name consisting of the two parts on the
9812 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9814 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9817 /* A helper that allocates a struct discriminant_info to attach to a
9820 static struct discriminant_info
*
9821 alloc_discriminant_info (struct type
*type
, int discriminant_index
,
9824 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9825 gdb_assert (discriminant_index
== -1
9826 || (discriminant_index
>= 0
9827 && discriminant_index
< TYPE_NFIELDS (type
)));
9828 gdb_assert (default_index
== -1
9829 || (default_index
>= 0 && default_index
< TYPE_NFIELDS (type
)));
9831 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
9833 struct discriminant_info
*disc
9834 = ((struct discriminant_info
*)
9836 offsetof (struct discriminant_info
, discriminants
)
9837 + TYPE_NFIELDS (type
) * sizeof (disc
->discriminants
[0])));
9838 disc
->default_index
= default_index
;
9839 disc
->discriminant_index
= discriminant_index
;
9841 struct dynamic_prop prop
;
9842 prop
.kind
= PROP_UNDEFINED
;
9843 prop
.data
.baton
= disc
;
9845 add_dyn_prop (DYN_PROP_DISCRIMINATED
, prop
, type
);
9850 /* Some versions of rustc emitted enums in an unusual way.
9852 Ordinary enums were emitted as unions. The first element of each
9853 structure in the union was named "RUST$ENUM$DISR". This element
9854 held the discriminant.
9856 These versions of Rust also implemented the "non-zero"
9857 optimization. When the enum had two values, and one is empty and
9858 the other holds a pointer that cannot be zero, the pointer is used
9859 as the discriminant, with a zero value meaning the empty variant.
9860 Here, the union's first member is of the form
9861 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9862 where the fieldnos are the indices of the fields that should be
9863 traversed in order to find the field (which may be several fields deep)
9864 and the variantname is the name of the variant of the case when the
9867 This function recognizes whether TYPE is of one of these forms,
9868 and, if so, smashes it to be a variant type. */
9871 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9873 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9875 /* We don't need to deal with empty enums. */
9876 if (TYPE_NFIELDS (type
) == 0)
9879 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9880 if (TYPE_NFIELDS (type
) == 1
9881 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9883 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9885 /* Decode the field name to find the offset of the
9887 ULONGEST bit_offset
= 0;
9888 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9889 while (name
[0] >= '0' && name
[0] <= '9')
9892 unsigned long index
= strtoul (name
, &tail
, 10);
9895 || index
>= TYPE_NFIELDS (field_type
)
9896 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9897 != FIELD_LOC_KIND_BITPOS
))
9899 complaint (_("Could not parse Rust enum encoding string \"%s\""
9901 TYPE_FIELD_NAME (type
, 0),
9902 objfile_name (objfile
));
9907 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9908 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9911 /* Make a union to hold the variants. */
9912 struct type
*union_type
= alloc_type (objfile
);
9913 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9914 TYPE_NFIELDS (union_type
) = 3;
9915 TYPE_FIELDS (union_type
)
9916 = (struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
));
9917 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9918 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
9920 /* Put the discriminant must at index 0. */
9921 TYPE_FIELD_TYPE (union_type
, 0) = field_type
;
9922 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
9923 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
9924 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 0), bit_offset
);
9926 /* The order of fields doesn't really matter, so put the real
9927 field at index 1 and the data-less field at index 2. */
9928 struct discriminant_info
*disc
9929 = alloc_discriminant_info (union_type
, 0, 1);
9930 TYPE_FIELD (union_type
, 1) = TYPE_FIELD (type
, 0);
9931 TYPE_FIELD_NAME (union_type
, 1)
9932 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1)));
9933 TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1))
9934 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9935 TYPE_FIELD_NAME (union_type
, 1));
9937 const char *dataless_name
9938 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9940 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9942 TYPE_FIELD_TYPE (union_type
, 2) = dataless_type
;
9943 /* NAME points into the original discriminant name, which
9944 already has the correct lifetime. */
9945 TYPE_FIELD_NAME (union_type
, 2) = name
;
9946 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 2), 0);
9947 disc
->discriminants
[2] = 0;
9949 /* Smash this type to be a structure type. We have to do this
9950 because the type has already been recorded. */
9951 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9952 TYPE_NFIELDS (type
) = 1;
9954 = (struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
));
9956 /* Install the variant part. */
9957 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9958 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9959 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
9961 else if (TYPE_NFIELDS (type
) == 1)
9963 /* We assume that a union with a single field is a univariant
9965 /* Smash this type to be a structure type. We have to do this
9966 because the type has already been recorded. */
9967 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9969 /* Make a union to hold the variants. */
9970 struct type
*union_type
= alloc_type (objfile
);
9971 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9972 TYPE_NFIELDS (union_type
) = TYPE_NFIELDS (type
);
9973 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9974 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
9975 TYPE_FIELDS (union_type
) = TYPE_FIELDS (type
);
9977 struct type
*field_type
= TYPE_FIELD_TYPE (union_type
, 0);
9978 const char *variant_name
9979 = rust_last_path_segment (TYPE_NAME (field_type
));
9980 TYPE_FIELD_NAME (union_type
, 0) = variant_name
;
9981 TYPE_NAME (field_type
)
9982 = rust_fully_qualify (&objfile
->objfile_obstack
,
9983 TYPE_NAME (type
), variant_name
);
9985 /* Install the union in the outer struct type. */
9986 TYPE_NFIELDS (type
) = 1;
9988 = (struct field
*) TYPE_ZALLOC (union_type
, sizeof (struct field
));
9989 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9990 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
9991 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9993 alloc_discriminant_info (union_type
, -1, 0);
9997 struct type
*disr_type
= nullptr;
9998 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
10000 disr_type
= TYPE_FIELD_TYPE (type
, i
);
10002 if (TYPE_CODE (disr_type
) != TYPE_CODE_STRUCT
)
10004 /* All fields of a true enum will be structs. */
10007 else if (TYPE_NFIELDS (disr_type
) == 0)
10009 /* Could be data-less variant, so keep going. */
10010 disr_type
= nullptr;
10012 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
10013 "RUST$ENUM$DISR") != 0)
10015 /* Not a Rust enum. */
10025 /* If we got here without a discriminant, then it's probably
10027 if (disr_type
== nullptr)
10030 /* Smash this type to be a structure type. We have to do this
10031 because the type has already been recorded. */
10032 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10034 /* Make a union to hold the variants. */
10035 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
10036 struct type
*union_type
= alloc_type (objfile
);
10037 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10038 TYPE_NFIELDS (union_type
) = 1 + TYPE_NFIELDS (type
);
10039 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10040 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
10041 TYPE_FIELDS (union_type
)
10042 = (struct field
*) TYPE_ZALLOC (union_type
,
10043 (TYPE_NFIELDS (union_type
)
10044 * sizeof (struct field
)));
10046 memcpy (TYPE_FIELDS (union_type
) + 1, TYPE_FIELDS (type
),
10047 TYPE_NFIELDS (type
) * sizeof (struct field
));
10049 /* Install the discriminant at index 0 in the union. */
10050 TYPE_FIELD (union_type
, 0) = *disr_field
;
10051 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
10052 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
10054 /* Install the union in the outer struct type. */
10055 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10056 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10057 TYPE_NFIELDS (type
) = 1;
10059 /* Set the size and offset of the union type. */
10060 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10062 /* We need a way to find the correct discriminant given a
10063 variant name. For convenience we build a map here. */
10064 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
10065 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
10066 for (int i
= 0; i
< TYPE_NFIELDS (enum_type
); ++i
)
10068 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
10071 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
10072 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
10076 int n_fields
= TYPE_NFIELDS (union_type
);
10077 struct discriminant_info
*disc
10078 = alloc_discriminant_info (union_type
, 0, -1);
10079 /* Skip the discriminant here. */
10080 for (int i
= 1; i
< n_fields
; ++i
)
10082 /* Find the final word in the name of this variant's type.
10083 That name can be used to look up the correct
10085 const char *variant_name
10086 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
,
10089 auto iter
= discriminant_map
.find (variant_name
);
10090 if (iter
!= discriminant_map
.end ())
10091 disc
->discriminants
[i
] = iter
->second
;
10093 /* Remove the discriminant field, if it exists. */
10094 struct type
*sub_type
= TYPE_FIELD_TYPE (union_type
, i
);
10095 if (TYPE_NFIELDS (sub_type
) > 0)
10097 --TYPE_NFIELDS (sub_type
);
10098 ++TYPE_FIELDS (sub_type
);
10100 TYPE_FIELD_NAME (union_type
, i
) = variant_name
;
10101 TYPE_NAME (sub_type
)
10102 = rust_fully_qualify (&objfile
->objfile_obstack
,
10103 TYPE_NAME (type
), variant_name
);
10108 /* Rewrite some Rust unions to be structures with variants parts. */
10111 rust_union_quirks (struct dwarf2_cu
*cu
)
10113 gdb_assert (cu
->language
== language_rust
);
10114 for (type
*type_
: cu
->rust_unions
)
10115 quirk_rust_enum (type_
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
10116 /* We don't need this any more. */
10117 cu
->rust_unions
.clear ();
10120 /* Return the symtab for PER_CU. This works properly regardless of
10121 whether we're using the index or psymtabs. */
10123 static struct compunit_symtab
*
10124 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
10126 return (per_cu
->dwarf2_per_objfile
->using_index
10127 ? per_cu
->v
.quick
->compunit_symtab
10128 : per_cu
->v
.psymtab
->compunit_symtab
);
10131 /* A helper function for computing the list of all symbol tables
10132 included by PER_CU. */
10135 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
10136 htab_t all_children
, htab_t all_type_symtabs
,
10137 struct dwarf2_per_cu_data
*per_cu
,
10138 struct compunit_symtab
*immediate_parent
)
10142 struct compunit_symtab
*cust
;
10143 struct dwarf2_per_cu_data
*iter
;
10145 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
10148 /* This inclusion and its children have been processed. */
10153 /* Only add a CU if it has a symbol table. */
10154 cust
= get_compunit_symtab (per_cu
);
10157 /* If this is a type unit only add its symbol table if we haven't
10158 seen it yet (type unit per_cu's can share symtabs). */
10159 if (per_cu
->is_debug_types
)
10161 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
10165 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
10166 if (cust
->user
== NULL
)
10167 cust
->user
= immediate_parent
;
10172 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
10173 if (cust
->user
== NULL
)
10174 cust
->user
= immediate_parent
;
10179 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
10182 recursively_compute_inclusions (result
, all_children
,
10183 all_type_symtabs
, iter
, cust
);
10187 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
10191 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
10193 gdb_assert (! per_cu
->is_debug_types
);
10195 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
10198 struct dwarf2_per_cu_data
*per_cu_iter
;
10199 struct compunit_symtab
*compunit_symtab_iter
;
10200 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
10201 htab_t all_children
, all_type_symtabs
;
10202 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
10204 /* If we don't have a symtab, we can just skip this case. */
10208 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10209 NULL
, xcalloc
, xfree
);
10210 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10211 NULL
, xcalloc
, xfree
);
10214 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
10218 recursively_compute_inclusions (&result_symtabs
, all_children
,
10219 all_type_symtabs
, per_cu_iter
,
10223 /* Now we have a transitive closure of all the included symtabs. */
10224 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
10226 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
10227 struct compunit_symtab
*, len
+ 1);
10229 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
10230 compunit_symtab_iter
);
10232 cust
->includes
[ix
] = compunit_symtab_iter
;
10233 cust
->includes
[len
] = NULL
;
10235 VEC_free (compunit_symtab_ptr
, result_symtabs
);
10236 htab_delete (all_children
);
10237 htab_delete (all_type_symtabs
);
10241 /* Compute the 'includes' field for the symtabs of all the CUs we just
10245 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
10247 for (dwarf2_per_cu_data
*iter
: dwarf2_per_objfile
->just_read_cus
)
10249 if (! iter
->is_debug_types
)
10250 compute_compunit_symtab_includes (iter
);
10253 dwarf2_per_objfile
->just_read_cus
.clear ();
10256 /* Generate full symbol information for PER_CU, whose DIEs have
10257 already been loaded into memory. */
10260 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
10261 enum language pretend_language
)
10263 struct dwarf2_cu
*cu
= per_cu
->cu
;
10264 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10265 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10266 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10267 CORE_ADDR lowpc
, highpc
;
10268 struct compunit_symtab
*cust
;
10269 CORE_ADDR baseaddr
;
10270 struct block
*static_block
;
10273 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10275 /* Clear the list here in case something was left over. */
10276 cu
->method_list
.clear ();
10278 cu
->language
= pretend_language
;
10279 cu
->language_defn
= language_def (cu
->language
);
10281 /* Do line number decoding in read_file_scope () */
10282 process_die (cu
->dies
, cu
);
10284 /* For now fudge the Go package. */
10285 if (cu
->language
== language_go
)
10286 fixup_go_packaging (cu
);
10288 /* Now that we have processed all the DIEs in the CU, all the types
10289 should be complete, and it should now be safe to compute all of the
10291 compute_delayed_physnames (cu
);
10293 if (cu
->language
== language_rust
)
10294 rust_union_quirks (cu
);
10296 /* Some compilers don't define a DW_AT_high_pc attribute for the
10297 compilation unit. If the DW_AT_high_pc is missing, synthesize
10298 it, by scanning the DIE's below the compilation unit. */
10299 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
10301 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
10302 static_block
= cu
->builder
->end_symtab_get_static_block (addr
, 0, 1);
10304 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
10305 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
10306 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
10307 addrmap to help ensure it has an accurate map of pc values belonging to
10309 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
10311 cust
= cu
->builder
->end_symtab_from_static_block (static_block
,
10312 SECT_OFF_TEXT (objfile
),
10317 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
10319 /* Set symtab language to language from DW_AT_language. If the
10320 compilation is from a C file generated by language preprocessors, do
10321 not set the language if it was already deduced by start_subfile. */
10322 if (!(cu
->language
== language_c
10323 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
10324 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10326 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
10327 produce DW_AT_location with location lists but it can be possibly
10328 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
10329 there were bugs in prologue debug info, fixed later in GCC-4.5
10330 by "unwind info for epilogues" patch (which is not directly related).
10332 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
10333 needed, it would be wrong due to missing DW_AT_producer there.
10335 Still one can confuse GDB by using non-standard GCC compilation
10336 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
10338 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
10339 cust
->locations_valid
= 1;
10341 if (gcc_4_minor
>= 5)
10342 cust
->epilogue_unwind_valid
= 1;
10344 cust
->call_site_htab
= cu
->call_site_htab
;
10347 if (dwarf2_per_objfile
->using_index
)
10348 per_cu
->v
.quick
->compunit_symtab
= cust
;
10351 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10352 pst
->compunit_symtab
= cust
;
10356 /* Push it for inclusion processing later. */
10357 dwarf2_per_objfile
->just_read_cus
.push_back (per_cu
);
10359 /* Not needed any more. */
10360 cu
->builder
.reset ();
10363 /* Generate full symbol information for type unit PER_CU, whose DIEs have
10364 already been loaded into memory. */
10367 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
10368 enum language pretend_language
)
10370 struct dwarf2_cu
*cu
= per_cu
->cu
;
10371 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10372 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10373 struct compunit_symtab
*cust
;
10374 struct signatured_type
*sig_type
;
10376 gdb_assert (per_cu
->is_debug_types
);
10377 sig_type
= (struct signatured_type
*) per_cu
;
10379 /* Clear the list here in case something was left over. */
10380 cu
->method_list
.clear ();
10382 cu
->language
= pretend_language
;
10383 cu
->language_defn
= language_def (cu
->language
);
10385 /* The symbol tables are set up in read_type_unit_scope. */
10386 process_die (cu
->dies
, cu
);
10388 /* For now fudge the Go package. */
10389 if (cu
->language
== language_go
)
10390 fixup_go_packaging (cu
);
10392 /* Now that we have processed all the DIEs in the CU, all the types
10393 should be complete, and it should now be safe to compute all of the
10395 compute_delayed_physnames (cu
);
10397 if (cu
->language
== language_rust
)
10398 rust_union_quirks (cu
);
10400 /* TUs share symbol tables.
10401 If this is the first TU to use this symtab, complete the construction
10402 of it with end_expandable_symtab. Otherwise, complete the addition of
10403 this TU's symbols to the existing symtab. */
10404 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
10406 cust
= cu
->builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
10407 sig_type
->type_unit_group
->compunit_symtab
= cust
;
10411 /* Set symtab language to language from DW_AT_language. If the
10412 compilation is from a C file generated by language preprocessors,
10413 do not set the language if it was already deduced by
10415 if (!(cu
->language
== language_c
10416 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
10417 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10422 cu
->builder
->augment_type_symtab ();
10423 cust
= sig_type
->type_unit_group
->compunit_symtab
;
10426 if (dwarf2_per_objfile
->using_index
)
10427 per_cu
->v
.quick
->compunit_symtab
= cust
;
10430 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10431 pst
->compunit_symtab
= cust
;
10435 /* Not needed any more. */
10436 cu
->builder
.reset ();
10439 /* Process an imported unit DIE. */
10442 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10444 struct attribute
*attr
;
10446 /* For now we don't handle imported units in type units. */
10447 if (cu
->per_cu
->is_debug_types
)
10449 error (_("Dwarf Error: DW_TAG_imported_unit is not"
10450 " supported in type units [in module %s]"),
10451 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
10454 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10457 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
10458 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
10459 dwarf2_per_cu_data
*per_cu
10460 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
10461 cu
->per_cu
->dwarf2_per_objfile
);
10463 /* If necessary, add it to the queue and load its DIEs. */
10464 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
10465 load_full_comp_unit (per_cu
, false, cu
->language
);
10467 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
10472 /* RAII object that represents a process_die scope: i.e.,
10473 starts/finishes processing a DIE. */
10474 class process_die_scope
10477 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
10478 : m_die (die
), m_cu (cu
)
10480 /* We should only be processing DIEs not already in process. */
10481 gdb_assert (!m_die
->in_process
);
10482 m_die
->in_process
= true;
10485 ~process_die_scope ()
10487 m_die
->in_process
= false;
10489 /* If we're done processing the DIE for the CU that owns the line
10490 header, we don't need the line header anymore. */
10491 if (m_cu
->line_header_die_owner
== m_die
)
10493 delete m_cu
->line_header
;
10494 m_cu
->line_header
= NULL
;
10495 m_cu
->line_header_die_owner
= NULL
;
10504 /* Process a die and its children. */
10507 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10509 process_die_scope
scope (die
, cu
);
10513 case DW_TAG_padding
:
10515 case DW_TAG_compile_unit
:
10516 case DW_TAG_partial_unit
:
10517 read_file_scope (die
, cu
);
10519 case DW_TAG_type_unit
:
10520 read_type_unit_scope (die
, cu
);
10522 case DW_TAG_subprogram
:
10523 case DW_TAG_inlined_subroutine
:
10524 read_func_scope (die
, cu
);
10526 case DW_TAG_lexical_block
:
10527 case DW_TAG_try_block
:
10528 case DW_TAG_catch_block
:
10529 read_lexical_block_scope (die
, cu
);
10531 case DW_TAG_call_site
:
10532 case DW_TAG_GNU_call_site
:
10533 read_call_site_scope (die
, cu
);
10535 case DW_TAG_class_type
:
10536 case DW_TAG_interface_type
:
10537 case DW_TAG_structure_type
:
10538 case DW_TAG_union_type
:
10539 process_structure_scope (die
, cu
);
10541 case DW_TAG_enumeration_type
:
10542 process_enumeration_scope (die
, cu
);
10545 /* These dies have a type, but processing them does not create
10546 a symbol or recurse to process the children. Therefore we can
10547 read them on-demand through read_type_die. */
10548 case DW_TAG_subroutine_type
:
10549 case DW_TAG_set_type
:
10550 case DW_TAG_array_type
:
10551 case DW_TAG_pointer_type
:
10552 case DW_TAG_ptr_to_member_type
:
10553 case DW_TAG_reference_type
:
10554 case DW_TAG_rvalue_reference_type
:
10555 case DW_TAG_string_type
:
10558 case DW_TAG_base_type
:
10559 case DW_TAG_subrange_type
:
10560 case DW_TAG_typedef
:
10561 /* Add a typedef symbol for the type definition, if it has a
10563 new_symbol (die
, read_type_die (die
, cu
), cu
);
10565 case DW_TAG_common_block
:
10566 read_common_block (die
, cu
);
10568 case DW_TAG_common_inclusion
:
10570 case DW_TAG_namespace
:
10571 cu
->processing_has_namespace_info
= 1;
10572 read_namespace (die
, cu
);
10574 case DW_TAG_module
:
10575 cu
->processing_has_namespace_info
= 1;
10576 read_module (die
, cu
);
10578 case DW_TAG_imported_declaration
:
10579 cu
->processing_has_namespace_info
= 1;
10580 if (read_namespace_alias (die
, cu
))
10582 /* The declaration is not a global namespace alias. */
10583 /* Fall through. */
10584 case DW_TAG_imported_module
:
10585 cu
->processing_has_namespace_info
= 1;
10586 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10587 || cu
->language
!= language_fortran
))
10588 complaint (_("Tag '%s' has unexpected children"),
10589 dwarf_tag_name (die
->tag
));
10590 read_import_statement (die
, cu
);
10593 case DW_TAG_imported_unit
:
10594 process_imported_unit_die (die
, cu
);
10597 case DW_TAG_variable
:
10598 read_variable (die
, cu
);
10602 new_symbol (die
, NULL
, cu
);
10607 /* DWARF name computation. */
10609 /* A helper function for dwarf2_compute_name which determines whether DIE
10610 needs to have the name of the scope prepended to the name listed in the
10614 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10616 struct attribute
*attr
;
10620 case DW_TAG_namespace
:
10621 case DW_TAG_typedef
:
10622 case DW_TAG_class_type
:
10623 case DW_TAG_interface_type
:
10624 case DW_TAG_structure_type
:
10625 case DW_TAG_union_type
:
10626 case DW_TAG_enumeration_type
:
10627 case DW_TAG_enumerator
:
10628 case DW_TAG_subprogram
:
10629 case DW_TAG_inlined_subroutine
:
10630 case DW_TAG_member
:
10631 case DW_TAG_imported_declaration
:
10634 case DW_TAG_variable
:
10635 case DW_TAG_constant
:
10636 /* We only need to prefix "globally" visible variables. These include
10637 any variable marked with DW_AT_external or any variable that
10638 lives in a namespace. [Variables in anonymous namespaces
10639 require prefixing, but they are not DW_AT_external.] */
10641 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10643 struct dwarf2_cu
*spec_cu
= cu
;
10645 return die_needs_namespace (die_specification (die
, &spec_cu
),
10649 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10650 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10651 && die
->parent
->tag
!= DW_TAG_module
)
10653 /* A variable in a lexical block of some kind does not need a
10654 namespace, even though in C++ such variables may be external
10655 and have a mangled name. */
10656 if (die
->parent
->tag
== DW_TAG_lexical_block
10657 || die
->parent
->tag
== DW_TAG_try_block
10658 || die
->parent
->tag
== DW_TAG_catch_block
10659 || die
->parent
->tag
== DW_TAG_subprogram
)
10668 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10669 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10670 defined for the given DIE. */
10672 static struct attribute
*
10673 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10675 struct attribute
*attr
;
10677 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10679 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10684 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10685 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10686 defined for the given DIE. */
10688 static const char *
10689 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10691 const char *linkage_name
;
10693 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10694 if (linkage_name
== NULL
)
10695 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10697 return linkage_name
;
10700 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10701 compute the physname for the object, which include a method's:
10702 - formal parameters (C++),
10703 - receiver type (Go),
10705 The term "physname" is a bit confusing.
10706 For C++, for example, it is the demangled name.
10707 For Go, for example, it's the mangled name.
10709 For Ada, return the DIE's linkage name rather than the fully qualified
10710 name. PHYSNAME is ignored..
10712 The result is allocated on the objfile_obstack and canonicalized. */
10714 static const char *
10715 dwarf2_compute_name (const char *name
,
10716 struct die_info
*die
, struct dwarf2_cu
*cu
,
10719 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10722 name
= dwarf2_name (die
, cu
);
10724 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10725 but otherwise compute it by typename_concat inside GDB.
10726 FIXME: Actually this is not really true, or at least not always true.
10727 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
10728 Fortran names because there is no mangling standard. So new_symbol
10729 will set the demangled name to the result of dwarf2_full_name, and it is
10730 the demangled name that GDB uses if it exists. */
10731 if (cu
->language
== language_ada
10732 || (cu
->language
== language_fortran
&& physname
))
10734 /* For Ada unit, we prefer the linkage name over the name, as
10735 the former contains the exported name, which the user expects
10736 to be able to reference. Ideally, we want the user to be able
10737 to reference this entity using either natural or linkage name,
10738 but we haven't started looking at this enhancement yet. */
10739 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10741 if (linkage_name
!= NULL
)
10742 return linkage_name
;
10745 /* These are the only languages we know how to qualify names in. */
10747 && (cu
->language
== language_cplus
10748 || cu
->language
== language_fortran
|| cu
->language
== language_d
10749 || cu
->language
== language_rust
))
10751 if (die_needs_namespace (die
, cu
))
10753 const char *prefix
;
10754 const char *canonical_name
= NULL
;
10758 prefix
= determine_prefix (die
, cu
);
10759 if (*prefix
!= '\0')
10761 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
10764 buf
.puts (prefixed_name
);
10765 xfree (prefixed_name
);
10770 /* Template parameters may be specified in the DIE's DW_AT_name, or
10771 as children with DW_TAG_template_type_param or
10772 DW_TAG_value_type_param. If the latter, add them to the name
10773 here. If the name already has template parameters, then
10774 skip this step; some versions of GCC emit both, and
10775 it is more efficient to use the pre-computed name.
10777 Something to keep in mind about this process: it is very
10778 unlikely, or in some cases downright impossible, to produce
10779 something that will match the mangled name of a function.
10780 If the definition of the function has the same debug info,
10781 we should be able to match up with it anyway. But fallbacks
10782 using the minimal symbol, for instance to find a method
10783 implemented in a stripped copy of libstdc++, will not work.
10784 If we do not have debug info for the definition, we will have to
10785 match them up some other way.
10787 When we do name matching there is a related problem with function
10788 templates; two instantiated function templates are allowed to
10789 differ only by their return types, which we do not add here. */
10791 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10793 struct attribute
*attr
;
10794 struct die_info
*child
;
10797 die
->building_fullname
= 1;
10799 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10803 const gdb_byte
*bytes
;
10804 struct dwarf2_locexpr_baton
*baton
;
10807 if (child
->tag
!= DW_TAG_template_type_param
10808 && child
->tag
!= DW_TAG_template_value_param
)
10819 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10822 complaint (_("template parameter missing DW_AT_type"));
10823 buf
.puts ("UNKNOWN_TYPE");
10826 type
= die_type (child
, cu
);
10828 if (child
->tag
== DW_TAG_template_type_param
)
10830 c_print_type (type
, "", &buf
, -1, 0, cu
->language
,
10831 &type_print_raw_options
);
10835 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10838 complaint (_("template parameter missing "
10839 "DW_AT_const_value"));
10840 buf
.puts ("UNKNOWN_VALUE");
10844 dwarf2_const_value_attr (attr
, type
, name
,
10845 &cu
->comp_unit_obstack
, cu
,
10846 &value
, &bytes
, &baton
);
10848 if (TYPE_NOSIGN (type
))
10849 /* GDB prints characters as NUMBER 'CHAR'. If that's
10850 changed, this can use value_print instead. */
10851 c_printchar (value
, type
, &buf
);
10854 struct value_print_options opts
;
10857 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10861 else if (bytes
!= NULL
)
10863 v
= allocate_value (type
);
10864 memcpy (value_contents_writeable (v
), bytes
,
10865 TYPE_LENGTH (type
));
10868 v
= value_from_longest (type
, value
);
10870 /* Specify decimal so that we do not depend on
10872 get_formatted_print_options (&opts
, 'd');
10874 value_print (v
, &buf
, &opts
);
10879 die
->building_fullname
= 0;
10883 /* Close the argument list, with a space if necessary
10884 (nested templates). */
10885 if (!buf
.empty () && buf
.string ().back () == '>')
10892 /* For C++ methods, append formal parameter type
10893 information, if PHYSNAME. */
10895 if (physname
&& die
->tag
== DW_TAG_subprogram
10896 && cu
->language
== language_cplus
)
10898 struct type
*type
= read_type_die (die
, cu
);
10900 c_type_print_args (type
, &buf
, 1, cu
->language
,
10901 &type_print_raw_options
);
10903 if (cu
->language
== language_cplus
)
10905 /* Assume that an artificial first parameter is
10906 "this", but do not crash if it is not. RealView
10907 marks unnamed (and thus unused) parameters as
10908 artificial; there is no way to differentiate
10910 if (TYPE_NFIELDS (type
) > 0
10911 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10912 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
10913 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10915 buf
.puts (" const");
10919 const std::string
&intermediate_name
= buf
.string ();
10921 if (cu
->language
== language_cplus
)
10923 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10924 &objfile
->per_bfd
->storage_obstack
);
10926 /* If we only computed INTERMEDIATE_NAME, or if
10927 INTERMEDIATE_NAME is already canonical, then we need to
10928 copy it to the appropriate obstack. */
10929 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10930 name
= ((const char *)
10931 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
10932 intermediate_name
.c_str (),
10933 intermediate_name
.length ()));
10935 name
= canonical_name
;
10942 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10943 If scope qualifiers are appropriate they will be added. The result
10944 will be allocated on the storage_obstack, or NULL if the DIE does
10945 not have a name. NAME may either be from a previous call to
10946 dwarf2_name or NULL.
10948 The output string will be canonicalized (if C++). */
10950 static const char *
10951 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10953 return dwarf2_compute_name (name
, die
, cu
, 0);
10956 /* Construct a physname for the given DIE in CU. NAME may either be
10957 from a previous call to dwarf2_name or NULL. The result will be
10958 allocated on the objfile_objstack or NULL if the DIE does not have a
10961 The output string will be canonicalized (if C++). */
10963 static const char *
10964 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10966 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10967 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10970 /* In this case dwarf2_compute_name is just a shortcut not building anything
10972 if (!die_needs_namespace (die
, cu
))
10973 return dwarf2_compute_name (name
, die
, cu
, 1);
10975 mangled
= dw2_linkage_name (die
, cu
);
10977 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10978 See https://github.com/rust-lang/rust/issues/32925. */
10979 if (cu
->language
== language_rust
&& mangled
!= NULL
10980 && strchr (mangled
, '{') != NULL
)
10983 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
10985 gdb::unique_xmalloc_ptr
<char> demangled
;
10986 if (mangled
!= NULL
)
10989 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
10991 /* Do nothing (do not demangle the symbol name). */
10993 else if (cu
->language
== language_go
)
10995 /* This is a lie, but we already lie to the caller new_symbol.
10996 new_symbol assumes we return the mangled name.
10997 This just undoes that lie until things are cleaned up. */
11001 /* Use DMGL_RET_DROP for C++ template functions to suppress
11002 their return type. It is easier for GDB users to search
11003 for such functions as `name(params)' than `long name(params)'.
11004 In such case the minimal symbol names do not match the full
11005 symbol names but for template functions there is never a need
11006 to look up their definition from their declaration so
11007 the only disadvantage remains the minimal symbol variant
11008 `long name(params)' does not have the proper inferior type. */
11009 demangled
.reset (gdb_demangle (mangled
,
11010 (DMGL_PARAMS
| DMGL_ANSI
11011 | DMGL_RET_DROP
)));
11014 canon
= demangled
.get ();
11022 if (canon
== NULL
|| check_physname
)
11024 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
11026 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
11028 /* It may not mean a bug in GDB. The compiler could also
11029 compute DW_AT_linkage_name incorrectly. But in such case
11030 GDB would need to be bug-to-bug compatible. */
11032 complaint (_("Computed physname <%s> does not match demangled <%s> "
11033 "(from linkage <%s>) - DIE at %s [in module %s]"),
11034 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
11035 objfile_name (objfile
));
11037 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
11038 is available here - over computed PHYSNAME. It is safer
11039 against both buggy GDB and buggy compilers. */
11053 retval
= ((const char *)
11054 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
11055 retval
, strlen (retval
)));
11060 /* Inspect DIE in CU for a namespace alias. If one exists, record
11061 a new symbol for it.
11063 Returns 1 if a namespace alias was recorded, 0 otherwise. */
11066 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
11068 struct attribute
*attr
;
11070 /* If the die does not have a name, this is not a namespace
11072 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11076 struct die_info
*d
= die
;
11077 struct dwarf2_cu
*imported_cu
= cu
;
11079 /* If the compiler has nested DW_AT_imported_declaration DIEs,
11080 keep inspecting DIEs until we hit the underlying import. */
11081 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
11082 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
11084 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
11088 d
= follow_die_ref (d
, attr
, &imported_cu
);
11089 if (d
->tag
!= DW_TAG_imported_declaration
)
11093 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
11095 complaint (_("DIE at %s has too many recursively imported "
11096 "declarations"), sect_offset_str (d
->sect_off
));
11103 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
11105 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
11106 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
11108 /* This declaration is a global namespace alias. Add
11109 a symbol for it whose type is the aliased namespace. */
11110 new_symbol (die
, type
, cu
);
11119 /* Return the using directives repository (global or local?) to use in the
11120 current context for CU.
11122 For Ada, imported declarations can materialize renamings, which *may* be
11123 global. However it is impossible (for now?) in DWARF to distinguish
11124 "external" imported declarations and "static" ones. As all imported
11125 declarations seem to be static in all other languages, make them all CU-wide
11126 global only in Ada. */
11128 static struct using_direct
**
11129 using_directives (struct dwarf2_cu
*cu
)
11131 if (cu
->language
== language_ada
&& cu
->builder
->outermost_context_p ())
11132 return cu
->builder
->get_global_using_directives ();
11134 return cu
->builder
->get_local_using_directives ();
11137 /* Read the import statement specified by the given die and record it. */
11140 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
11142 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11143 struct attribute
*import_attr
;
11144 struct die_info
*imported_die
, *child_die
;
11145 struct dwarf2_cu
*imported_cu
;
11146 const char *imported_name
;
11147 const char *imported_name_prefix
;
11148 const char *canonical_name
;
11149 const char *import_alias
;
11150 const char *imported_declaration
= NULL
;
11151 const char *import_prefix
;
11152 std::vector
<const char *> excludes
;
11154 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
11155 if (import_attr
== NULL
)
11157 complaint (_("Tag '%s' has no DW_AT_import"),
11158 dwarf_tag_name (die
->tag
));
11163 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
11164 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11165 if (imported_name
== NULL
)
11167 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
11169 The import in the following code:
11183 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
11184 <52> DW_AT_decl_file : 1
11185 <53> DW_AT_decl_line : 6
11186 <54> DW_AT_import : <0x75>
11187 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
11188 <59> DW_AT_name : B
11189 <5b> DW_AT_decl_file : 1
11190 <5c> DW_AT_decl_line : 2
11191 <5d> DW_AT_type : <0x6e>
11193 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
11194 <76> DW_AT_byte_size : 4
11195 <77> DW_AT_encoding : 5 (signed)
11197 imports the wrong die ( 0x75 instead of 0x58 ).
11198 This case will be ignored until the gcc bug is fixed. */
11202 /* Figure out the local name after import. */
11203 import_alias
= dwarf2_name (die
, cu
);
11205 /* Figure out where the statement is being imported to. */
11206 import_prefix
= determine_prefix (die
, cu
);
11208 /* Figure out what the scope of the imported die is and prepend it
11209 to the name of the imported die. */
11210 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
11212 if (imported_die
->tag
!= DW_TAG_namespace
11213 && imported_die
->tag
!= DW_TAG_module
)
11215 imported_declaration
= imported_name
;
11216 canonical_name
= imported_name_prefix
;
11218 else if (strlen (imported_name_prefix
) > 0)
11219 canonical_name
= obconcat (&objfile
->objfile_obstack
,
11220 imported_name_prefix
,
11221 (cu
->language
== language_d
? "." : "::"),
11222 imported_name
, (char *) NULL
);
11224 canonical_name
= imported_name
;
11226 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
11227 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11228 child_die
= sibling_die (child_die
))
11230 /* DWARF-4: A Fortran use statement with a “rename list” may be
11231 represented by an imported module entry with an import attribute
11232 referring to the module and owned entries corresponding to those
11233 entities that are renamed as part of being imported. */
11235 if (child_die
->tag
!= DW_TAG_imported_declaration
)
11237 complaint (_("child DW_TAG_imported_declaration expected "
11238 "- DIE at %s [in module %s]"),
11239 sect_offset_str (child_die
->sect_off
),
11240 objfile_name (objfile
));
11244 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
11245 if (import_attr
== NULL
)
11247 complaint (_("Tag '%s' has no DW_AT_import"),
11248 dwarf_tag_name (child_die
->tag
));
11253 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
11255 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11256 if (imported_name
== NULL
)
11258 complaint (_("child DW_TAG_imported_declaration has unknown "
11259 "imported name - DIE at %s [in module %s]"),
11260 sect_offset_str (child_die
->sect_off
),
11261 objfile_name (objfile
));
11265 excludes
.push_back (imported_name
);
11267 process_die (child_die
, cu
);
11270 add_using_directive (using_directives (cu
),
11274 imported_declaration
,
11277 &objfile
->objfile_obstack
);
11280 /* ICC<14 does not output the required DW_AT_declaration on incomplete
11281 types, but gives them a size of zero. Starting with version 14,
11282 ICC is compatible with GCC. */
11285 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
11287 if (!cu
->checked_producer
)
11288 check_producer (cu
);
11290 return cu
->producer_is_icc_lt_14
;
11293 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
11294 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
11295 this, it was first present in GCC release 4.3.0. */
11298 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
11300 if (!cu
->checked_producer
)
11301 check_producer (cu
);
11303 return cu
->producer_is_gcc_lt_4_3
;
11306 static file_and_directory
11307 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
11309 file_and_directory res
;
11311 /* Find the filename. Do not use dwarf2_name here, since the filename
11312 is not a source language identifier. */
11313 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
11314 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
11316 if (res
.comp_dir
== NULL
11317 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
11318 && IS_ABSOLUTE_PATH (res
.name
))
11320 res
.comp_dir_storage
= ldirname (res
.name
);
11321 if (!res
.comp_dir_storage
.empty ())
11322 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
11324 if (res
.comp_dir
!= NULL
)
11326 /* Irix 6.2 native cc prepends <machine>.: to the compilation
11327 directory, get rid of it. */
11328 const char *cp
= strchr (res
.comp_dir
, ':');
11330 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
11331 res
.comp_dir
= cp
+ 1;
11334 if (res
.name
== NULL
)
11335 res
.name
= "<unknown>";
11340 /* Handle DW_AT_stmt_list for a compilation unit.
11341 DIE is the DW_TAG_compile_unit die for CU.
11342 COMP_DIR is the compilation directory. LOWPC is passed to
11343 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
11346 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
11347 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
11349 struct dwarf2_per_objfile
*dwarf2_per_objfile
11350 = cu
->per_cu
->dwarf2_per_objfile
;
11351 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11352 struct attribute
*attr
;
11353 struct line_header line_header_local
;
11354 hashval_t line_header_local_hash
;
11356 int decode_mapping
;
11358 gdb_assert (! cu
->per_cu
->is_debug_types
);
11360 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11364 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11366 /* The line header hash table is only created if needed (it exists to
11367 prevent redundant reading of the line table for partial_units).
11368 If we're given a partial_unit, we'll need it. If we're given a
11369 compile_unit, then use the line header hash table if it's already
11370 created, but don't create one just yet. */
11372 if (dwarf2_per_objfile
->line_header_hash
== NULL
11373 && die
->tag
== DW_TAG_partial_unit
)
11375 dwarf2_per_objfile
->line_header_hash
11376 = htab_create_alloc_ex (127, line_header_hash_voidp
,
11377 line_header_eq_voidp
,
11378 free_line_header_voidp
,
11379 &objfile
->objfile_obstack
,
11380 hashtab_obstack_allocate
,
11381 dummy_obstack_deallocate
);
11384 line_header_local
.sect_off
= line_offset
;
11385 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
11386 line_header_local_hash
= line_header_hash (&line_header_local
);
11387 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
11389 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11390 &line_header_local
,
11391 line_header_local_hash
, NO_INSERT
);
11393 /* For DW_TAG_compile_unit we need info like symtab::linetable which
11394 is not present in *SLOT (since if there is something in *SLOT then
11395 it will be for a partial_unit). */
11396 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
11398 gdb_assert (*slot
!= NULL
);
11399 cu
->line_header
= (struct line_header
*) *slot
;
11404 /* dwarf_decode_line_header does not yet provide sufficient information.
11405 We always have to call also dwarf_decode_lines for it. */
11406 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
11410 cu
->line_header
= lh
.release ();
11411 cu
->line_header_die_owner
= die
;
11413 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
11417 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11418 &line_header_local
,
11419 line_header_local_hash
, INSERT
);
11420 gdb_assert (slot
!= NULL
);
11422 if (slot
!= NULL
&& *slot
== NULL
)
11424 /* This newly decoded line number information unit will be owned
11425 by line_header_hash hash table. */
11426 *slot
= cu
->line_header
;
11427 cu
->line_header_die_owner
= NULL
;
11431 /* We cannot free any current entry in (*slot) as that struct line_header
11432 may be already used by multiple CUs. Create only temporary decoded
11433 line_header for this CU - it may happen at most once for each line
11434 number information unit. And if we're not using line_header_hash
11435 then this is what we want as well. */
11436 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
11438 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
11439 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
11444 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
11447 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11449 struct dwarf2_per_objfile
*dwarf2_per_objfile
11450 = cu
->per_cu
->dwarf2_per_objfile
;
11451 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11452 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11453 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
11454 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
11455 struct attribute
*attr
;
11456 struct die_info
*child_die
;
11457 CORE_ADDR baseaddr
;
11459 prepare_one_comp_unit (cu
, die
, cu
->language
);
11460 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11462 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
11464 /* If we didn't find a lowpc, set it to highpc to avoid complaints
11465 from finish_block. */
11466 if (lowpc
== ((CORE_ADDR
) -1))
11468 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11470 file_and_directory fnd
= find_file_and_directory (die
, cu
);
11472 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
11473 standardised yet. As a workaround for the language detection we fall
11474 back to the DW_AT_producer string. */
11475 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
11476 cu
->language
= language_opencl
;
11478 /* Similar hack for Go. */
11479 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
11480 set_cu_language (DW_LANG_Go
, cu
);
11482 dwarf2_start_symtab (cu
, fnd
.name
, fnd
.comp_dir
, lowpc
);
11484 /* Decode line number information if present. We do this before
11485 processing child DIEs, so that the line header table is available
11486 for DW_AT_decl_file. */
11487 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
11489 /* Process all dies in compilation unit. */
11490 if (die
->child
!= NULL
)
11492 child_die
= die
->child
;
11493 while (child_die
&& child_die
->tag
)
11495 process_die (child_die
, cu
);
11496 child_die
= sibling_die (child_die
);
11500 /* Decode macro information, if present. Dwarf 2 macro information
11501 refers to information in the line number info statement program
11502 header, so we can only read it if we've read the header
11504 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11506 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11507 if (attr
&& cu
->line_header
)
11509 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11510 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11512 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
11516 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11517 if (attr
&& cu
->line_header
)
11519 unsigned int macro_offset
= DW_UNSND (attr
);
11521 dwarf_decode_macros (cu
, macro_offset
, 0);
11526 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
11527 Create the set of symtabs used by this TU, or if this TU is sharing
11528 symtabs with another TU and the symtabs have already been created
11529 then restore those symtabs in the line header.
11530 We don't need the pc/line-number mapping for type units. */
11533 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
11535 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
11536 struct type_unit_group
*tu_group
;
11538 struct attribute
*attr
;
11540 struct signatured_type
*sig_type
;
11542 gdb_assert (per_cu
->is_debug_types
);
11543 sig_type
= (struct signatured_type
*) per_cu
;
11545 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11547 /* If we're using .gdb_index (includes -readnow) then
11548 per_cu->type_unit_group may not have been set up yet. */
11549 if (sig_type
->type_unit_group
== NULL
)
11550 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
11551 tu_group
= sig_type
->type_unit_group
;
11553 /* If we've already processed this stmt_list there's no real need to
11554 do it again, we could fake it and just recreate the part we need
11555 (file name,index -> symtab mapping). If data shows this optimization
11556 is useful we can do it then. */
11557 first_time
= tu_group
->compunit_symtab
== NULL
;
11559 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11564 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11565 lh
= dwarf_decode_line_header (line_offset
, cu
);
11570 dwarf2_start_symtab (cu
, "", NULL
, 0);
11573 gdb_assert (tu_group
->symtabs
== NULL
);
11574 gdb_assert (cu
->builder
== nullptr);
11575 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11576 cu
->builder
.reset (new struct buildsym_compunit
11577 (COMPUNIT_OBJFILE (cust
), "",
11578 COMPUNIT_DIRNAME (cust
),
11579 compunit_language (cust
),
11585 cu
->line_header
= lh
.release ();
11586 cu
->line_header_die_owner
= die
;
11590 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
11592 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11593 still initializing it, and our caller (a few levels up)
11594 process_full_type_unit still needs to know if this is the first
11597 tu_group
->num_symtabs
= cu
->line_header
->file_names
.size ();
11598 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
11599 cu
->line_header
->file_names
.size ());
11601 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
11603 file_entry
&fe
= cu
->line_header
->file_names
[i
];
11605 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (cu
->line_header
));
11607 if (cu
->builder
->get_current_subfile ()->symtab
== NULL
)
11609 /* NOTE: start_subfile will recognize when it's been
11610 passed a file it has already seen. So we can't
11611 assume there's a simple mapping from
11612 cu->line_header->file_names to subfiles, plus
11613 cu->line_header->file_names may contain dups. */
11614 cu
->builder
->get_current_subfile ()->symtab
11615 = allocate_symtab (cust
,
11616 cu
->builder
->get_current_subfile ()->name
);
11619 fe
.symtab
= cu
->builder
->get_current_subfile ()->symtab
;
11620 tu_group
->symtabs
[i
] = fe
.symtab
;
11625 gdb_assert (cu
->builder
== nullptr);
11626 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11627 cu
->builder
.reset (new struct buildsym_compunit
11628 (COMPUNIT_OBJFILE (cust
), "",
11629 COMPUNIT_DIRNAME (cust
),
11630 compunit_language (cust
),
11633 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
11635 file_entry
&fe
= cu
->line_header
->file_names
[i
];
11637 fe
.symtab
= tu_group
->symtabs
[i
];
11641 /* The main symtab is allocated last. Type units don't have DW_AT_name
11642 so they don't have a "real" (so to speak) symtab anyway.
11643 There is later code that will assign the main symtab to all symbols
11644 that don't have one. We need to handle the case of a symbol with a
11645 missing symtab (DW_AT_decl_file) anyway. */
11648 /* Process DW_TAG_type_unit.
11649 For TUs we want to skip the first top level sibling if it's not the
11650 actual type being defined by this TU. In this case the first top
11651 level sibling is there to provide context only. */
11654 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11656 struct die_info
*child_die
;
11658 prepare_one_comp_unit (cu
, die
, language_minimal
);
11660 /* Initialize (or reinitialize) the machinery for building symtabs.
11661 We do this before processing child DIEs, so that the line header table
11662 is available for DW_AT_decl_file. */
11663 setup_type_unit_groups (die
, cu
);
11665 if (die
->child
!= NULL
)
11667 child_die
= die
->child
;
11668 while (child_die
&& child_die
->tag
)
11670 process_die (child_die
, cu
);
11671 child_die
= sibling_die (child_die
);
11678 http://gcc.gnu.org/wiki/DebugFission
11679 http://gcc.gnu.org/wiki/DebugFissionDWP
11681 To simplify handling of both DWO files ("object" files with the DWARF info)
11682 and DWP files (a file with the DWOs packaged up into one file), we treat
11683 DWP files as having a collection of virtual DWO files. */
11686 hash_dwo_file (const void *item
)
11688 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11691 hash
= htab_hash_string (dwo_file
->dwo_name
);
11692 if (dwo_file
->comp_dir
!= NULL
)
11693 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11698 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11700 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11701 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11703 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11705 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11706 return lhs
->comp_dir
== rhs
->comp_dir
;
11707 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11710 /* Allocate a hash table for DWO files. */
11713 allocate_dwo_file_hash_table (struct objfile
*objfile
)
11715 return htab_create_alloc_ex (41,
11719 &objfile
->objfile_obstack
,
11720 hashtab_obstack_allocate
,
11721 dummy_obstack_deallocate
);
11724 /* Lookup DWO file DWO_NAME. */
11727 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11728 const char *dwo_name
,
11729 const char *comp_dir
)
11731 struct dwo_file find_entry
;
11734 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11735 dwarf2_per_objfile
->dwo_files
11736 = allocate_dwo_file_hash_table (dwarf2_per_objfile
->objfile
);
11738 memset (&find_entry
, 0, sizeof (find_entry
));
11739 find_entry
.dwo_name
= dwo_name
;
11740 find_entry
.comp_dir
= comp_dir
;
11741 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
11747 hash_dwo_unit (const void *item
)
11749 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11751 /* This drops the top 32 bits of the id, but is ok for a hash. */
11752 return dwo_unit
->signature
;
11756 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11758 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11759 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11761 /* The signature is assumed to be unique within the DWO file.
11762 So while object file CU dwo_id's always have the value zero,
11763 that's OK, assuming each object file DWO file has only one CU,
11764 and that's the rule for now. */
11765 return lhs
->signature
== rhs
->signature
;
11768 /* Allocate a hash table for DWO CUs,TUs.
11769 There is one of these tables for each of CUs,TUs for each DWO file. */
11772 allocate_dwo_unit_table (struct objfile
*objfile
)
11774 /* Start out with a pretty small number.
11775 Generally DWO files contain only one CU and maybe some TUs. */
11776 return htab_create_alloc_ex (3,
11780 &objfile
->objfile_obstack
,
11781 hashtab_obstack_allocate
,
11782 dummy_obstack_deallocate
);
11785 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
11787 struct create_dwo_cu_data
11789 struct dwo_file
*dwo_file
;
11790 struct dwo_unit dwo_unit
;
11793 /* die_reader_func for create_dwo_cu. */
11796 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11797 const gdb_byte
*info_ptr
,
11798 struct die_info
*comp_unit_die
,
11802 struct dwarf2_cu
*cu
= reader
->cu
;
11803 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11804 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11805 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
11806 struct dwo_file
*dwo_file
= data
->dwo_file
;
11807 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
11808 struct attribute
*attr
;
11810 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
11813 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11814 " its dwo_id [in module %s]"),
11815 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11819 dwo_unit
->dwo_file
= dwo_file
;
11820 dwo_unit
->signature
= DW_UNSND (attr
);
11821 dwo_unit
->section
= section
;
11822 dwo_unit
->sect_off
= sect_off
;
11823 dwo_unit
->length
= cu
->per_cu
->length
;
11825 if (dwarf_read_debug
)
11826 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11827 sect_offset_str (sect_off
),
11828 hex_string (dwo_unit
->signature
));
11831 /* Create the dwo_units for the CUs in a DWO_FILE.
11832 Note: This function processes DWO files only, not DWP files. */
11835 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11836 struct dwo_file
&dwo_file
, dwarf2_section_info
§ion
,
11839 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11840 const gdb_byte
*info_ptr
, *end_ptr
;
11842 dwarf2_read_section (objfile
, §ion
);
11843 info_ptr
= section
.buffer
;
11845 if (info_ptr
== NULL
)
11848 if (dwarf_read_debug
)
11850 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11851 get_section_name (§ion
),
11852 get_section_file_name (§ion
));
11855 end_ptr
= info_ptr
+ section
.size
;
11856 while (info_ptr
< end_ptr
)
11858 struct dwarf2_per_cu_data per_cu
;
11859 struct create_dwo_cu_data create_dwo_cu_data
;
11860 struct dwo_unit
*dwo_unit
;
11862 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11864 memset (&create_dwo_cu_data
.dwo_unit
, 0,
11865 sizeof (create_dwo_cu_data
.dwo_unit
));
11866 memset (&per_cu
, 0, sizeof (per_cu
));
11867 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11868 per_cu
.is_debug_types
= 0;
11869 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11870 per_cu
.section
= §ion
;
11871 create_dwo_cu_data
.dwo_file
= &dwo_file
;
11873 init_cutu_and_read_dies_no_follow (
11874 &per_cu
, &dwo_file
, create_dwo_cu_reader
, &create_dwo_cu_data
);
11875 info_ptr
+= per_cu
.length
;
11877 // If the unit could not be parsed, skip it.
11878 if (create_dwo_cu_data
.dwo_unit
.dwo_file
== NULL
)
11881 if (cus_htab
== NULL
)
11882 cus_htab
= allocate_dwo_unit_table (objfile
);
11884 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11885 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
11886 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
11887 gdb_assert (slot
!= NULL
);
11890 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11891 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11893 complaint (_("debug cu entry at offset %s is duplicate to"
11894 " the entry at offset %s, signature %s"),
11895 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11896 hex_string (dwo_unit
->signature
));
11898 *slot
= (void *)dwo_unit
;
11902 /* DWP file .debug_{cu,tu}_index section format:
11903 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11907 Both index sections have the same format, and serve to map a 64-bit
11908 signature to a set of section numbers. Each section begins with a header,
11909 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11910 indexes, and a pool of 32-bit section numbers. The index sections will be
11911 aligned at 8-byte boundaries in the file.
11913 The index section header consists of:
11915 V, 32 bit version number
11917 N, 32 bit number of compilation units or type units in the index
11918 M, 32 bit number of slots in the hash table
11920 Numbers are recorded using the byte order of the application binary.
11922 The hash table begins at offset 16 in the section, and consists of an array
11923 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11924 order of the application binary). Unused slots in the hash table are 0.
11925 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11927 The parallel table begins immediately after the hash table
11928 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11929 array of 32-bit indexes (using the byte order of the application binary),
11930 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11931 table contains a 32-bit index into the pool of section numbers. For unused
11932 hash table slots, the corresponding entry in the parallel table will be 0.
11934 The pool of section numbers begins immediately following the hash table
11935 (at offset 16 + 12 * M from the beginning of the section). The pool of
11936 section numbers consists of an array of 32-bit words (using the byte order
11937 of the application binary). Each item in the array is indexed starting
11938 from 0. The hash table entry provides the index of the first section
11939 number in the set. Additional section numbers in the set follow, and the
11940 set is terminated by a 0 entry (section number 0 is not used in ELF).
11942 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11943 section must be the first entry in the set, and the .debug_abbrev.dwo must
11944 be the second entry. Other members of the set may follow in any order.
11950 DWP Version 2 combines all the .debug_info, etc. sections into one,
11951 and the entries in the index tables are now offsets into these sections.
11952 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11955 Index Section Contents:
11957 Hash Table of Signatures dwp_hash_table.hash_table
11958 Parallel Table of Indices dwp_hash_table.unit_table
11959 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
11960 Table of Section Sizes dwp_hash_table.v2.sizes
11962 The index section header consists of:
11964 V, 32 bit version number
11965 L, 32 bit number of columns in the table of section offsets
11966 N, 32 bit number of compilation units or type units in the index
11967 M, 32 bit number of slots in the hash table
11969 Numbers are recorded using the byte order of the application binary.
11971 The hash table has the same format as version 1.
11972 The parallel table of indices has the same format as version 1,
11973 except that the entries are origin-1 indices into the table of sections
11974 offsets and the table of section sizes.
11976 The table of offsets begins immediately following the parallel table
11977 (at offset 16 + 12 * M from the beginning of the section). The table is
11978 a two-dimensional array of 32-bit words (using the byte order of the
11979 application binary), with L columns and N+1 rows, in row-major order.
11980 Each row in the array is indexed starting from 0. The first row provides
11981 a key to the remaining rows: each column in this row provides an identifier
11982 for a debug section, and the offsets in the same column of subsequent rows
11983 refer to that section. The section identifiers are:
11985 DW_SECT_INFO 1 .debug_info.dwo
11986 DW_SECT_TYPES 2 .debug_types.dwo
11987 DW_SECT_ABBREV 3 .debug_abbrev.dwo
11988 DW_SECT_LINE 4 .debug_line.dwo
11989 DW_SECT_LOC 5 .debug_loc.dwo
11990 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
11991 DW_SECT_MACINFO 7 .debug_macinfo.dwo
11992 DW_SECT_MACRO 8 .debug_macro.dwo
11994 The offsets provided by the CU and TU index sections are the base offsets
11995 for the contributions made by each CU or TU to the corresponding section
11996 in the package file. Each CU and TU header contains an abbrev_offset
11997 field, used to find the abbreviations table for that CU or TU within the
11998 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
11999 be interpreted as relative to the base offset given in the index section.
12000 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
12001 should be interpreted as relative to the base offset for .debug_line.dwo,
12002 and offsets into other debug sections obtained from DWARF attributes should
12003 also be interpreted as relative to the corresponding base offset.
12005 The table of sizes begins immediately following the table of offsets.
12006 Like the table of offsets, it is a two-dimensional array of 32-bit words,
12007 with L columns and N rows, in row-major order. Each row in the array is
12008 indexed starting from 1 (row 0 is shared by the two tables).
12012 Hash table lookup is handled the same in version 1 and 2:
12014 We assume that N and M will not exceed 2^32 - 1.
12015 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
12017 Given a 64-bit compilation unit signature or a type signature S, an entry
12018 in the hash table is located as follows:
12020 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
12021 the low-order k bits all set to 1.
12023 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
12025 3) If the hash table entry at index H matches the signature, use that
12026 entry. If the hash table entry at index H is unused (all zeroes),
12027 terminate the search: the signature is not present in the table.
12029 4) Let H = (H + H') modulo M. Repeat at Step 3.
12031 Because M > N and H' and M are relatively prime, the search is guaranteed
12032 to stop at an unused slot or find the match. */
12034 /* Create a hash table to map DWO IDs to their CU/TU entry in
12035 .debug_{info,types}.dwo in DWP_FILE.
12036 Returns NULL if there isn't one.
12037 Note: This function processes DWP files only, not DWO files. */
12039 static struct dwp_hash_table
*
12040 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12041 struct dwp_file
*dwp_file
, int is_debug_types
)
12043 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12044 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12045 const gdb_byte
*index_ptr
, *index_end
;
12046 struct dwarf2_section_info
*index
;
12047 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
12048 struct dwp_hash_table
*htab
;
12050 if (is_debug_types
)
12051 index
= &dwp_file
->sections
.tu_index
;
12053 index
= &dwp_file
->sections
.cu_index
;
12055 if (dwarf2_section_empty_p (index
))
12057 dwarf2_read_section (objfile
, index
);
12059 index_ptr
= index
->buffer
;
12060 index_end
= index_ptr
+ index
->size
;
12062 version
= read_4_bytes (dbfd
, index_ptr
);
12065 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
12069 nr_units
= read_4_bytes (dbfd
, index_ptr
);
12071 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
12074 if (version
!= 1 && version
!= 2)
12076 error (_("Dwarf Error: unsupported DWP file version (%s)"
12077 " [in module %s]"),
12078 pulongest (version
), dwp_file
->name
);
12080 if (nr_slots
!= (nr_slots
& -nr_slots
))
12082 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
12083 " is not power of 2 [in module %s]"),
12084 pulongest (nr_slots
), dwp_file
->name
);
12087 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
12088 htab
->version
= version
;
12089 htab
->nr_columns
= nr_columns
;
12090 htab
->nr_units
= nr_units
;
12091 htab
->nr_slots
= nr_slots
;
12092 htab
->hash_table
= index_ptr
;
12093 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
12095 /* Exit early if the table is empty. */
12096 if (nr_slots
== 0 || nr_units
== 0
12097 || (version
== 2 && nr_columns
== 0))
12099 /* All must be zero. */
12100 if (nr_slots
!= 0 || nr_units
!= 0
12101 || (version
== 2 && nr_columns
!= 0))
12103 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
12104 " all zero [in modules %s]"),
12112 htab
->section_pool
.v1
.indices
=
12113 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12114 /* It's harder to decide whether the section is too small in v1.
12115 V1 is deprecated anyway so we punt. */
12119 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12120 int *ids
= htab
->section_pool
.v2
.section_ids
;
12121 /* Reverse map for error checking. */
12122 int ids_seen
[DW_SECT_MAX
+ 1];
12125 if (nr_columns
< 2)
12127 error (_("Dwarf Error: bad DWP hash table, too few columns"
12128 " in section table [in module %s]"),
12131 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
12133 error (_("Dwarf Error: bad DWP hash table, too many columns"
12134 " in section table [in module %s]"),
12137 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
12138 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
12139 for (i
= 0; i
< nr_columns
; ++i
)
12141 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
12143 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
12145 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
12146 " in section table [in module %s]"),
12147 id
, dwp_file
->name
);
12149 if (ids_seen
[id
] != -1)
12151 error (_("Dwarf Error: bad DWP hash table, duplicate section"
12152 " id %d in section table [in module %s]"),
12153 id
, dwp_file
->name
);
12158 /* Must have exactly one info or types section. */
12159 if (((ids_seen
[DW_SECT_INFO
] != -1)
12160 + (ids_seen
[DW_SECT_TYPES
] != -1))
12163 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
12164 " DWO info/types section [in module %s]"),
12167 /* Must have an abbrev section. */
12168 if (ids_seen
[DW_SECT_ABBREV
] == -1)
12170 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
12171 " section [in module %s]"),
12174 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
12175 htab
->section_pool
.v2
.sizes
=
12176 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
12177 * nr_units
* nr_columns
);
12178 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
12179 * nr_units
* nr_columns
))
12182 error (_("Dwarf Error: DWP index section is corrupt (too small)"
12183 " [in module %s]"),
12191 /* Update SECTIONS with the data from SECTP.
12193 This function is like the other "locate" section routines that are
12194 passed to bfd_map_over_sections, but in this context the sections to
12195 read comes from the DWP V1 hash table, not the full ELF section table.
12197 The result is non-zero for success, or zero if an error was found. */
12200 locate_v1_virtual_dwo_sections (asection
*sectp
,
12201 struct virtual_v1_dwo_sections
*sections
)
12203 const struct dwop_section_names
*names
= &dwop_section_names
;
12205 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12207 /* There can be only one. */
12208 if (sections
->abbrev
.s
.section
!= NULL
)
12210 sections
->abbrev
.s
.section
= sectp
;
12211 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12213 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
12214 || section_is_p (sectp
->name
, &names
->types_dwo
))
12216 /* There can be only one. */
12217 if (sections
->info_or_types
.s
.section
!= NULL
)
12219 sections
->info_or_types
.s
.section
= sectp
;
12220 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
12222 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12224 /* There can be only one. */
12225 if (sections
->line
.s
.section
!= NULL
)
12227 sections
->line
.s
.section
= sectp
;
12228 sections
->line
.size
= bfd_get_section_size (sectp
);
12230 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12232 /* There can be only one. */
12233 if (sections
->loc
.s
.section
!= NULL
)
12235 sections
->loc
.s
.section
= sectp
;
12236 sections
->loc
.size
= bfd_get_section_size (sectp
);
12238 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12240 /* There can be only one. */
12241 if (sections
->macinfo
.s
.section
!= NULL
)
12243 sections
->macinfo
.s
.section
= sectp
;
12244 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12246 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12248 /* There can be only one. */
12249 if (sections
->macro
.s
.section
!= NULL
)
12251 sections
->macro
.s
.section
= sectp
;
12252 sections
->macro
.size
= bfd_get_section_size (sectp
);
12254 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12256 /* There can be only one. */
12257 if (sections
->str_offsets
.s
.section
!= NULL
)
12259 sections
->str_offsets
.s
.section
= sectp
;
12260 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12264 /* No other kind of section is valid. */
12271 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12272 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12273 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12274 This is for DWP version 1 files. */
12276 static struct dwo_unit
*
12277 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12278 struct dwp_file
*dwp_file
,
12279 uint32_t unit_index
,
12280 const char *comp_dir
,
12281 ULONGEST signature
, int is_debug_types
)
12283 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12284 const struct dwp_hash_table
*dwp_htab
=
12285 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12286 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12287 const char *kind
= is_debug_types
? "TU" : "CU";
12288 struct dwo_file
*dwo_file
;
12289 struct dwo_unit
*dwo_unit
;
12290 struct virtual_v1_dwo_sections sections
;
12291 void **dwo_file_slot
;
12294 gdb_assert (dwp_file
->version
== 1);
12296 if (dwarf_read_debug
)
12298 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
12300 pulongest (unit_index
), hex_string (signature
),
12304 /* Fetch the sections of this DWO unit.
12305 Put a limit on the number of sections we look for so that bad data
12306 doesn't cause us to loop forever. */
12308 #define MAX_NR_V1_DWO_SECTIONS \
12309 (1 /* .debug_info or .debug_types */ \
12310 + 1 /* .debug_abbrev */ \
12311 + 1 /* .debug_line */ \
12312 + 1 /* .debug_loc */ \
12313 + 1 /* .debug_str_offsets */ \
12314 + 1 /* .debug_macro or .debug_macinfo */ \
12315 + 1 /* trailing zero */)
12317 memset (§ions
, 0, sizeof (sections
));
12319 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
12322 uint32_t section_nr
=
12323 read_4_bytes (dbfd
,
12324 dwp_htab
->section_pool
.v1
.indices
12325 + (unit_index
+ i
) * sizeof (uint32_t));
12327 if (section_nr
== 0)
12329 if (section_nr
>= dwp_file
->num_sections
)
12331 error (_("Dwarf Error: bad DWP hash table, section number too large"
12332 " [in module %s]"),
12336 sectp
= dwp_file
->elf_sections
[section_nr
];
12337 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
12339 error (_("Dwarf Error: bad DWP hash table, invalid section found"
12340 " [in module %s]"),
12346 || dwarf2_section_empty_p (§ions
.info_or_types
)
12347 || dwarf2_section_empty_p (§ions
.abbrev
))
12349 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
12350 " [in module %s]"),
12353 if (i
== MAX_NR_V1_DWO_SECTIONS
)
12355 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
12356 " [in module %s]"),
12360 /* It's easier for the rest of the code if we fake a struct dwo_file and
12361 have dwo_unit "live" in that. At least for now.
12363 The DWP file can be made up of a random collection of CUs and TUs.
12364 However, for each CU + set of TUs that came from the same original DWO
12365 file, we can combine them back into a virtual DWO file to save space
12366 (fewer struct dwo_file objects to allocate). Remember that for really
12367 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12369 std::string virtual_dwo_name
=
12370 string_printf ("virtual-dwo/%d-%d-%d-%d",
12371 get_section_id (§ions
.abbrev
),
12372 get_section_id (§ions
.line
),
12373 get_section_id (§ions
.loc
),
12374 get_section_id (§ions
.str_offsets
));
12375 /* Can we use an existing virtual DWO file? */
12376 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12377 virtual_dwo_name
.c_str (),
12379 /* Create one if necessary. */
12380 if (*dwo_file_slot
== NULL
)
12382 if (dwarf_read_debug
)
12384 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12385 virtual_dwo_name
.c_str ());
12387 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12389 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12390 virtual_dwo_name
.c_str (),
12391 virtual_dwo_name
.size ());
12392 dwo_file
->comp_dir
= comp_dir
;
12393 dwo_file
->sections
.abbrev
= sections
.abbrev
;
12394 dwo_file
->sections
.line
= sections
.line
;
12395 dwo_file
->sections
.loc
= sections
.loc
;
12396 dwo_file
->sections
.macinfo
= sections
.macinfo
;
12397 dwo_file
->sections
.macro
= sections
.macro
;
12398 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
12399 /* The "str" section is global to the entire DWP file. */
12400 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12401 /* The info or types section is assigned below to dwo_unit,
12402 there's no need to record it in dwo_file.
12403 Also, we can't simply record type sections in dwo_file because
12404 we record a pointer into the vector in dwo_unit. As we collect more
12405 types we'll grow the vector and eventually have to reallocate space
12406 for it, invalidating all copies of pointers into the previous
12408 *dwo_file_slot
= dwo_file
;
12412 if (dwarf_read_debug
)
12414 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12415 virtual_dwo_name
.c_str ());
12417 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12420 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12421 dwo_unit
->dwo_file
= dwo_file
;
12422 dwo_unit
->signature
= signature
;
12423 dwo_unit
->section
=
12424 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12425 *dwo_unit
->section
= sections
.info_or_types
;
12426 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12431 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
12432 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
12433 piece within that section used by a TU/CU, return a virtual section
12434 of just that piece. */
12436 static struct dwarf2_section_info
12437 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12438 struct dwarf2_section_info
*section
,
12439 bfd_size_type offset
, bfd_size_type size
)
12441 struct dwarf2_section_info result
;
12444 gdb_assert (section
!= NULL
);
12445 gdb_assert (!section
->is_virtual
);
12447 memset (&result
, 0, sizeof (result
));
12448 result
.s
.containing_section
= section
;
12449 result
.is_virtual
= 1;
12454 sectp
= get_section_bfd_section (section
);
12456 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
12457 bounds of the real section. This is a pretty-rare event, so just
12458 flag an error (easier) instead of a warning and trying to cope. */
12460 || offset
+ size
> bfd_get_section_size (sectp
))
12462 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
12463 " in section %s [in module %s]"),
12464 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
12465 objfile_name (dwarf2_per_objfile
->objfile
));
12468 result
.virtual_offset
= offset
;
12469 result
.size
= size
;
12473 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12474 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12475 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12476 This is for DWP version 2 files. */
12478 static struct dwo_unit
*
12479 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12480 struct dwp_file
*dwp_file
,
12481 uint32_t unit_index
,
12482 const char *comp_dir
,
12483 ULONGEST signature
, int is_debug_types
)
12485 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12486 const struct dwp_hash_table
*dwp_htab
=
12487 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12488 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12489 const char *kind
= is_debug_types
? "TU" : "CU";
12490 struct dwo_file
*dwo_file
;
12491 struct dwo_unit
*dwo_unit
;
12492 struct virtual_v2_dwo_sections sections
;
12493 void **dwo_file_slot
;
12496 gdb_assert (dwp_file
->version
== 2);
12498 if (dwarf_read_debug
)
12500 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
12502 pulongest (unit_index
), hex_string (signature
),
12506 /* Fetch the section offsets of this DWO unit. */
12508 memset (§ions
, 0, sizeof (sections
));
12510 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12512 uint32_t offset
= read_4_bytes (dbfd
,
12513 dwp_htab
->section_pool
.v2
.offsets
12514 + (((unit_index
- 1) * dwp_htab
->nr_columns
12516 * sizeof (uint32_t)));
12517 uint32_t size
= read_4_bytes (dbfd
,
12518 dwp_htab
->section_pool
.v2
.sizes
12519 + (((unit_index
- 1) * dwp_htab
->nr_columns
12521 * sizeof (uint32_t)));
12523 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12526 case DW_SECT_TYPES
:
12527 sections
.info_or_types_offset
= offset
;
12528 sections
.info_or_types_size
= size
;
12530 case DW_SECT_ABBREV
:
12531 sections
.abbrev_offset
= offset
;
12532 sections
.abbrev_size
= size
;
12535 sections
.line_offset
= offset
;
12536 sections
.line_size
= size
;
12539 sections
.loc_offset
= offset
;
12540 sections
.loc_size
= size
;
12542 case DW_SECT_STR_OFFSETS
:
12543 sections
.str_offsets_offset
= offset
;
12544 sections
.str_offsets_size
= size
;
12546 case DW_SECT_MACINFO
:
12547 sections
.macinfo_offset
= offset
;
12548 sections
.macinfo_size
= size
;
12550 case DW_SECT_MACRO
:
12551 sections
.macro_offset
= offset
;
12552 sections
.macro_size
= size
;
12557 /* It's easier for the rest of the code if we fake a struct dwo_file and
12558 have dwo_unit "live" in that. At least for now.
12560 The DWP file can be made up of a random collection of CUs and TUs.
12561 However, for each CU + set of TUs that came from the same original DWO
12562 file, we can combine them back into a virtual DWO file to save space
12563 (fewer struct dwo_file objects to allocate). Remember that for really
12564 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12566 std::string virtual_dwo_name
=
12567 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12568 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12569 (long) (sections
.line_size
? sections
.line_offset
: 0),
12570 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12571 (long) (sections
.str_offsets_size
12572 ? sections
.str_offsets_offset
: 0));
12573 /* Can we use an existing virtual DWO file? */
12574 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12575 virtual_dwo_name
.c_str (),
12577 /* Create one if necessary. */
12578 if (*dwo_file_slot
== NULL
)
12580 if (dwarf_read_debug
)
12582 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12583 virtual_dwo_name
.c_str ());
12585 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12587 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12588 virtual_dwo_name
.c_str (),
12589 virtual_dwo_name
.size ());
12590 dwo_file
->comp_dir
= comp_dir
;
12591 dwo_file
->sections
.abbrev
=
12592 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
12593 sections
.abbrev_offset
, sections
.abbrev_size
);
12594 dwo_file
->sections
.line
=
12595 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
12596 sections
.line_offset
, sections
.line_size
);
12597 dwo_file
->sections
.loc
=
12598 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12599 sections
.loc_offset
, sections
.loc_size
);
12600 dwo_file
->sections
.macinfo
=
12601 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12602 sections
.macinfo_offset
, sections
.macinfo_size
);
12603 dwo_file
->sections
.macro
=
12604 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12605 sections
.macro_offset
, sections
.macro_size
);
12606 dwo_file
->sections
.str_offsets
=
12607 create_dwp_v2_section (dwarf2_per_objfile
,
12608 &dwp_file
->sections
.str_offsets
,
12609 sections
.str_offsets_offset
,
12610 sections
.str_offsets_size
);
12611 /* The "str" section is global to the entire DWP file. */
12612 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12613 /* The info or types section is assigned below to dwo_unit,
12614 there's no need to record it in dwo_file.
12615 Also, we can't simply record type sections in dwo_file because
12616 we record a pointer into the vector in dwo_unit. As we collect more
12617 types we'll grow the vector and eventually have to reallocate space
12618 for it, invalidating all copies of pointers into the previous
12620 *dwo_file_slot
= dwo_file
;
12624 if (dwarf_read_debug
)
12626 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12627 virtual_dwo_name
.c_str ());
12629 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12632 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12633 dwo_unit
->dwo_file
= dwo_file
;
12634 dwo_unit
->signature
= signature
;
12635 dwo_unit
->section
=
12636 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12637 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12639 ? &dwp_file
->sections
.types
12640 : &dwp_file
->sections
.info
,
12641 sections
.info_or_types_offset
,
12642 sections
.info_or_types_size
);
12643 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12648 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12649 Returns NULL if the signature isn't found. */
12651 static struct dwo_unit
*
12652 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12653 struct dwp_file
*dwp_file
, const char *comp_dir
,
12654 ULONGEST signature
, int is_debug_types
)
12656 const struct dwp_hash_table
*dwp_htab
=
12657 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12658 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12659 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12660 uint32_t hash
= signature
& mask
;
12661 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12664 struct dwo_unit find_dwo_cu
;
12666 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12667 find_dwo_cu
.signature
= signature
;
12668 slot
= htab_find_slot (is_debug_types
12669 ? dwp_file
->loaded_tus
12670 : dwp_file
->loaded_cus
,
12671 &find_dwo_cu
, INSERT
);
12674 return (struct dwo_unit
*) *slot
;
12676 /* Use a for loop so that we don't loop forever on bad debug info. */
12677 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12679 ULONGEST signature_in_table
;
12681 signature_in_table
=
12682 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12683 if (signature_in_table
== signature
)
12685 uint32_t unit_index
=
12686 read_4_bytes (dbfd
,
12687 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12689 if (dwp_file
->version
== 1)
12691 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12692 dwp_file
, unit_index
,
12693 comp_dir
, signature
,
12698 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12699 dwp_file
, unit_index
,
12700 comp_dir
, signature
,
12703 return (struct dwo_unit
*) *slot
;
12705 if (signature_in_table
== 0)
12707 hash
= (hash
+ hash2
) & mask
;
12710 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12711 " [in module %s]"),
12715 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12716 Open the file specified by FILE_NAME and hand it off to BFD for
12717 preliminary analysis. Return a newly initialized bfd *, which
12718 includes a canonicalized copy of FILE_NAME.
12719 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12720 SEARCH_CWD is true if the current directory is to be searched.
12721 It will be searched before debug-file-directory.
12722 If successful, the file is added to the bfd include table of the
12723 objfile's bfd (see gdb_bfd_record_inclusion).
12724 If unable to find/open the file, return NULL.
12725 NOTE: This function is derived from symfile_bfd_open. */
12727 static gdb_bfd_ref_ptr
12728 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12729 const char *file_name
, int is_dwp
, int search_cwd
)
12732 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12733 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12734 to debug_file_directory. */
12735 const char *search_path
;
12736 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12738 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12741 if (*debug_file_directory
!= '\0')
12743 search_path_holder
.reset (concat (".", dirname_separator_string
,
12744 debug_file_directory
,
12746 search_path
= search_path_holder
.get ();
12752 search_path
= debug_file_directory
;
12754 openp_flags flags
= OPF_RETURN_REALPATH
;
12756 flags
|= OPF_SEARCH_IN_PATH
;
12758 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12759 desc
= openp (search_path
, flags
, file_name
,
12760 O_RDONLY
| O_BINARY
, &absolute_name
);
12764 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12766 if (sym_bfd
== NULL
)
12768 bfd_set_cacheable (sym_bfd
.get (), 1);
12770 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12773 /* Success. Record the bfd as having been included by the objfile's bfd.
12774 This is important because things like demangled_names_hash lives in the
12775 objfile's per_bfd space and may have references to things like symbol
12776 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12777 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12782 /* Try to open DWO file FILE_NAME.
12783 COMP_DIR is the DW_AT_comp_dir attribute.
12784 The result is the bfd handle of the file.
12785 If there is a problem finding or opening the file, return NULL.
12786 Upon success, the canonicalized path of the file is stored in the bfd,
12787 same as symfile_bfd_open. */
12789 static gdb_bfd_ref_ptr
12790 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12791 const char *file_name
, const char *comp_dir
)
12793 if (IS_ABSOLUTE_PATH (file_name
))
12794 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12795 0 /*is_dwp*/, 0 /*search_cwd*/);
12797 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12799 if (comp_dir
!= NULL
)
12801 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
12802 file_name
, (char *) NULL
);
12804 /* NOTE: If comp_dir is a relative path, this will also try the
12805 search path, which seems useful. */
12806 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12809 1 /*search_cwd*/));
12810 xfree (path_to_try
);
12815 /* That didn't work, try debug-file-directory, which, despite its name,
12816 is a list of paths. */
12818 if (*debug_file_directory
== '\0')
12821 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12822 0 /*is_dwp*/, 1 /*search_cwd*/);
12825 /* This function is mapped across the sections and remembers the offset and
12826 size of each of the DWO debugging sections we are interested in. */
12829 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12831 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12832 const struct dwop_section_names
*names
= &dwop_section_names
;
12834 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12836 dwo_sections
->abbrev
.s
.section
= sectp
;
12837 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12839 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12841 dwo_sections
->info
.s
.section
= sectp
;
12842 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
12844 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12846 dwo_sections
->line
.s
.section
= sectp
;
12847 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
12849 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12851 dwo_sections
->loc
.s
.section
= sectp
;
12852 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
12854 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12856 dwo_sections
->macinfo
.s
.section
= sectp
;
12857 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12859 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12861 dwo_sections
->macro
.s
.section
= sectp
;
12862 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
12864 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12866 dwo_sections
->str
.s
.section
= sectp
;
12867 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
12869 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12871 dwo_sections
->str_offsets
.s
.section
= sectp
;
12872 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12874 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12876 struct dwarf2_section_info type_section
;
12878 memset (&type_section
, 0, sizeof (type_section
));
12879 type_section
.s
.section
= sectp
;
12880 type_section
.size
= bfd_get_section_size (sectp
);
12881 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
12886 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12887 by PER_CU. This is for the non-DWP case.
12888 The result is NULL if DWO_NAME can't be found. */
12890 static struct dwo_file
*
12891 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12892 const char *dwo_name
, const char *comp_dir
)
12894 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12895 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12897 gdb_bfd_ref_ptr
dbfd (open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
));
12900 if (dwarf_read_debug
)
12901 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12905 /* We use a unique pointer here, despite the obstack allocation,
12906 because a dwo_file needs some cleanup if it is abandoned. */
12907 dwo_file_up
dwo_file (OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
12909 dwo_file
->dwo_name
= dwo_name
;
12910 dwo_file
->comp_dir
= comp_dir
;
12911 dwo_file
->dbfd
= dbfd
.release ();
12913 bfd_map_over_sections (dwo_file
->dbfd
, dwarf2_locate_dwo_sections
,
12914 &dwo_file
->sections
);
12916 create_cus_hash_table (dwarf2_per_objfile
, *dwo_file
, dwo_file
->sections
.info
,
12919 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
12920 dwo_file
->sections
.types
, dwo_file
->tus
);
12922 if (dwarf_read_debug
)
12923 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
12925 return dwo_file
.release ();
12928 /* This function is mapped across the sections and remembers the offset and
12929 size of each of the DWP debugging sections common to version 1 and 2 that
12930 we are interested in. */
12933 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12934 void *dwp_file_ptr
)
12936 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12937 const struct dwop_section_names
*names
= &dwop_section_names
;
12938 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12940 /* Record the ELF section number for later lookup: this is what the
12941 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12942 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12943 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12945 /* Look for specific sections that we need. */
12946 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12948 dwp_file
->sections
.str
.s
.section
= sectp
;
12949 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
12951 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12953 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12954 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
12956 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12958 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12959 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
12963 /* This function is mapped across the sections and remembers the offset and
12964 size of each of the DWP version 2 debugging sections that we are interested
12965 in. This is split into a separate function because we don't know if we
12966 have version 1 or 2 until we parse the cu_index/tu_index sections. */
12969 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12971 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12972 const struct dwop_section_names
*names
= &dwop_section_names
;
12973 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12975 /* Record the ELF section number for later lookup: this is what the
12976 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12977 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12978 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12980 /* Look for specific sections that we need. */
12981 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12983 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12984 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
12986 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12988 dwp_file
->sections
.info
.s
.section
= sectp
;
12989 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
12991 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12993 dwp_file
->sections
.line
.s
.section
= sectp
;
12994 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
12996 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12998 dwp_file
->sections
.loc
.s
.section
= sectp
;
12999 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
13001 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
13003 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
13004 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
13006 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
13008 dwp_file
->sections
.macro
.s
.section
= sectp
;
13009 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
13011 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
13013 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
13014 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
13016 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
13018 dwp_file
->sections
.types
.s
.section
= sectp
;
13019 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
13023 /* Hash function for dwp_file loaded CUs/TUs. */
13026 hash_dwp_loaded_cutus (const void *item
)
13028 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
13030 /* This drops the top 32 bits of the signature, but is ok for a hash. */
13031 return dwo_unit
->signature
;
13034 /* Equality function for dwp_file loaded CUs/TUs. */
13037 eq_dwp_loaded_cutus (const void *a
, const void *b
)
13039 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
13040 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
13042 return dua
->signature
== dub
->signature
;
13045 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
13048 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
13050 return htab_create_alloc_ex (3,
13051 hash_dwp_loaded_cutus
,
13052 eq_dwp_loaded_cutus
,
13054 &objfile
->objfile_obstack
,
13055 hashtab_obstack_allocate
,
13056 dummy_obstack_deallocate
);
13059 /* Try to open DWP file FILE_NAME.
13060 The result is the bfd handle of the file.
13061 If there is a problem finding or opening the file, return NULL.
13062 Upon success, the canonicalized path of the file is stored in the bfd,
13063 same as symfile_bfd_open. */
13065 static gdb_bfd_ref_ptr
13066 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
13067 const char *file_name
)
13069 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
13071 1 /*search_cwd*/));
13075 /* Work around upstream bug 15652.
13076 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
13077 [Whether that's a "bug" is debatable, but it is getting in our way.]
13078 We have no real idea where the dwp file is, because gdb's realpath-ing
13079 of the executable's path may have discarded the needed info.
13080 [IWBN if the dwp file name was recorded in the executable, akin to
13081 .gnu_debuglink, but that doesn't exist yet.]
13082 Strip the directory from FILE_NAME and search again. */
13083 if (*debug_file_directory
!= '\0')
13085 /* Don't implicitly search the current directory here.
13086 If the user wants to search "." to handle this case,
13087 it must be added to debug-file-directory. */
13088 return try_open_dwop_file (dwarf2_per_objfile
,
13089 lbasename (file_name
), 1 /*is_dwp*/,
13096 /* Initialize the use of the DWP file for the current objfile.
13097 By convention the name of the DWP file is ${objfile}.dwp.
13098 The result is NULL if it can't be found. */
13100 static std::unique_ptr
<struct dwp_file
>
13101 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13103 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13105 /* Try to find first .dwp for the binary file before any symbolic links
13108 /* If the objfile is a debug file, find the name of the real binary
13109 file and get the name of dwp file from there. */
13110 std::string dwp_name
;
13111 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
13113 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
13114 const char *backlink_basename
= lbasename (backlink
->original_name
);
13116 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
13119 dwp_name
= objfile
->original_name
;
13121 dwp_name
+= ".dwp";
13123 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
13125 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
13127 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
13128 dwp_name
= objfile_name (objfile
);
13129 dwp_name
+= ".dwp";
13130 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
13135 if (dwarf_read_debug
)
13136 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
13137 return std::unique_ptr
<dwp_file
> ();
13140 const char *name
= bfd_get_filename (dbfd
.get ());
13141 std::unique_ptr
<struct dwp_file
> dwp_file
13142 (new struct dwp_file (name
, std::move (dbfd
)));
13144 /* +1: section 0 is unused */
13145 dwp_file
->num_sections
= bfd_count_sections (dwp_file
->dbfd
) + 1;
13146 dwp_file
->elf_sections
=
13147 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
13148 dwp_file
->num_sections
, asection
*);
13150 bfd_map_over_sections (dwp_file
->dbfd
.get (),
13151 dwarf2_locate_common_dwp_sections
,
13154 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
13157 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
13160 /* The DWP file version is stored in the hash table. Oh well. */
13161 if (dwp_file
->cus
&& dwp_file
->tus
13162 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
13164 /* Technically speaking, we should try to limp along, but this is
13165 pretty bizarre. We use pulongest here because that's the established
13166 portability solution (e.g, we cannot use %u for uint32_t). */
13167 error (_("Dwarf Error: DWP file CU version %s doesn't match"
13168 " TU version %s [in DWP file %s]"),
13169 pulongest (dwp_file
->cus
->version
),
13170 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
13174 dwp_file
->version
= dwp_file
->cus
->version
;
13175 else if (dwp_file
->tus
)
13176 dwp_file
->version
= dwp_file
->tus
->version
;
13178 dwp_file
->version
= 2;
13180 if (dwp_file
->version
== 2)
13181 bfd_map_over_sections (dwp_file
->dbfd
.get (),
13182 dwarf2_locate_v2_dwp_sections
,
13185 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
13186 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
13188 if (dwarf_read_debug
)
13190 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
13191 fprintf_unfiltered (gdb_stdlog
,
13192 " %s CUs, %s TUs\n",
13193 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
13194 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
13200 /* Wrapper around open_and_init_dwp_file, only open it once. */
13202 static struct dwp_file
*
13203 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13205 if (! dwarf2_per_objfile
->dwp_checked
)
13207 dwarf2_per_objfile
->dwp_file
13208 = open_and_init_dwp_file (dwarf2_per_objfile
);
13209 dwarf2_per_objfile
->dwp_checked
= 1;
13211 return dwarf2_per_objfile
->dwp_file
.get ();
13214 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
13215 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
13216 or in the DWP file for the objfile, referenced by THIS_UNIT.
13217 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
13218 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
13220 This is called, for example, when wanting to read a variable with a
13221 complex location. Therefore we don't want to do file i/o for every call.
13222 Therefore we don't want to look for a DWO file on every call.
13223 Therefore we first see if we've already seen SIGNATURE in a DWP file,
13224 then we check if we've already seen DWO_NAME, and only THEN do we check
13227 The result is a pointer to the dwo_unit object or NULL if we didn't find it
13228 (dwo_id mismatch or couldn't find the DWO/DWP file). */
13230 static struct dwo_unit
*
13231 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
13232 const char *dwo_name
, const char *comp_dir
,
13233 ULONGEST signature
, int is_debug_types
)
13235 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
13236 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13237 const char *kind
= is_debug_types
? "TU" : "CU";
13238 void **dwo_file_slot
;
13239 struct dwo_file
*dwo_file
;
13240 struct dwp_file
*dwp_file
;
13242 /* First see if there's a DWP file.
13243 If we have a DWP file but didn't find the DWO inside it, don't
13244 look for the original DWO file. It makes gdb behave differently
13245 depending on whether one is debugging in the build tree. */
13247 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
13248 if (dwp_file
!= NULL
)
13250 const struct dwp_hash_table
*dwp_htab
=
13251 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
13253 if (dwp_htab
!= NULL
)
13255 struct dwo_unit
*dwo_cutu
=
13256 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
13257 signature
, is_debug_types
);
13259 if (dwo_cutu
!= NULL
)
13261 if (dwarf_read_debug
)
13263 fprintf_unfiltered (gdb_stdlog
,
13264 "Virtual DWO %s %s found: @%s\n",
13265 kind
, hex_string (signature
),
13266 host_address_to_string (dwo_cutu
));
13274 /* No DWP file, look for the DWO file. */
13276 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
13277 dwo_name
, comp_dir
);
13278 if (*dwo_file_slot
== NULL
)
13280 /* Read in the file and build a table of the CUs/TUs it contains. */
13281 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
13283 /* NOTE: This will be NULL if unable to open the file. */
13284 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
13286 if (dwo_file
!= NULL
)
13288 struct dwo_unit
*dwo_cutu
= NULL
;
13290 if (is_debug_types
&& dwo_file
->tus
)
13292 struct dwo_unit find_dwo_cutu
;
13294 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13295 find_dwo_cutu
.signature
= signature
;
13297 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
13299 else if (!is_debug_types
&& dwo_file
->cus
)
13301 struct dwo_unit find_dwo_cutu
;
13303 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13304 find_dwo_cutu
.signature
= signature
;
13305 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
13309 if (dwo_cutu
!= NULL
)
13311 if (dwarf_read_debug
)
13313 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
13314 kind
, dwo_name
, hex_string (signature
),
13315 host_address_to_string (dwo_cutu
));
13322 /* We didn't find it. This could mean a dwo_id mismatch, or
13323 someone deleted the DWO/DWP file, or the search path isn't set up
13324 correctly to find the file. */
13326 if (dwarf_read_debug
)
13328 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
13329 kind
, dwo_name
, hex_string (signature
));
13332 /* This is a warning and not a complaint because it can be caused by
13333 pilot error (e.g., user accidentally deleting the DWO). */
13335 /* Print the name of the DWP file if we looked there, helps the user
13336 better diagnose the problem. */
13337 std::string dwp_text
;
13339 if (dwp_file
!= NULL
)
13340 dwp_text
= string_printf (" [in DWP file %s]",
13341 lbasename (dwp_file
->name
));
13343 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
13344 " [in module %s]"),
13345 kind
, dwo_name
, hex_string (signature
),
13347 this_unit
->is_debug_types
? "TU" : "CU",
13348 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
13353 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
13354 See lookup_dwo_cutu_unit for details. */
13356 static struct dwo_unit
*
13357 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
13358 const char *dwo_name
, const char *comp_dir
,
13359 ULONGEST signature
)
13361 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
13364 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
13365 See lookup_dwo_cutu_unit for details. */
13367 static struct dwo_unit
*
13368 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
13369 const char *dwo_name
, const char *comp_dir
)
13371 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
13374 /* Traversal function for queue_and_load_all_dwo_tus. */
13377 queue_and_load_dwo_tu (void **slot
, void *info
)
13379 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
13380 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
13381 ULONGEST signature
= dwo_unit
->signature
;
13382 struct signatured_type
*sig_type
=
13383 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
13385 if (sig_type
!= NULL
)
13387 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
13389 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
13390 a real dependency of PER_CU on SIG_TYPE. That is detected later
13391 while processing PER_CU. */
13392 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
13393 load_full_type_unit (sig_cu
);
13394 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
13400 /* Queue all TUs contained in the DWO of PER_CU to be read in.
13401 The DWO may have the only definition of the type, though it may not be
13402 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
13403 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
13406 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
13408 struct dwo_unit
*dwo_unit
;
13409 struct dwo_file
*dwo_file
;
13411 gdb_assert (!per_cu
->is_debug_types
);
13412 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
13413 gdb_assert (per_cu
->cu
!= NULL
);
13415 dwo_unit
= per_cu
->cu
->dwo_unit
;
13416 gdb_assert (dwo_unit
!= NULL
);
13418 dwo_file
= dwo_unit
->dwo_file
;
13419 if (dwo_file
->tus
!= NULL
)
13420 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
13423 /* Free all resources associated with DWO_FILE.
13424 Close the DWO file and munmap the sections. */
13427 free_dwo_file (struct dwo_file
*dwo_file
)
13429 /* Note: dbfd is NULL for virtual DWO files. */
13430 gdb_bfd_unref (dwo_file
->dbfd
);
13432 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
13435 /* Traversal function for free_dwo_files. */
13438 free_dwo_file_from_slot (void **slot
, void *info
)
13440 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
13442 free_dwo_file (dwo_file
);
13447 /* Free all resources associated with DWO_FILES. */
13450 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
13452 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
13455 /* Read in various DIEs. */
13457 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
13458 Inherit only the children of the DW_AT_abstract_origin DIE not being
13459 already referenced by DW_AT_abstract_origin from the children of the
13463 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
13465 struct die_info
*child_die
;
13466 sect_offset
*offsetp
;
13467 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
13468 struct die_info
*origin_die
;
13469 /* Iterator of the ORIGIN_DIE children. */
13470 struct die_info
*origin_child_die
;
13471 struct attribute
*attr
;
13472 struct dwarf2_cu
*origin_cu
;
13473 struct pending
**origin_previous_list_in_scope
;
13475 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13479 /* Note that following die references may follow to a die in a
13483 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
13485 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
13487 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
13488 origin_cu
->list_in_scope
= cu
->list_in_scope
;
13490 if (die
->tag
!= origin_die
->tag
13491 && !(die
->tag
== DW_TAG_inlined_subroutine
13492 && origin_die
->tag
== DW_TAG_subprogram
))
13493 complaint (_("DIE %s and its abstract origin %s have different tags"),
13494 sect_offset_str (die
->sect_off
),
13495 sect_offset_str (origin_die
->sect_off
));
13497 std::vector
<sect_offset
> offsets
;
13499 for (child_die
= die
->child
;
13500 child_die
&& child_die
->tag
;
13501 child_die
= sibling_die (child_die
))
13503 struct die_info
*child_origin_die
;
13504 struct dwarf2_cu
*child_origin_cu
;
13506 /* We are trying to process concrete instance entries:
13507 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
13508 it's not relevant to our analysis here. i.e. detecting DIEs that are
13509 present in the abstract instance but not referenced in the concrete
13511 if (child_die
->tag
== DW_TAG_call_site
13512 || child_die
->tag
== DW_TAG_GNU_call_site
)
13515 /* For each CHILD_DIE, find the corresponding child of
13516 ORIGIN_DIE. If there is more than one layer of
13517 DW_AT_abstract_origin, follow them all; there shouldn't be,
13518 but GCC versions at least through 4.4 generate this (GCC PR
13520 child_origin_die
= child_die
;
13521 child_origin_cu
= cu
;
13524 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
13528 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
13532 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
13533 counterpart may exist. */
13534 if (child_origin_die
!= child_die
)
13536 if (child_die
->tag
!= child_origin_die
->tag
13537 && !(child_die
->tag
== DW_TAG_inlined_subroutine
13538 && child_origin_die
->tag
== DW_TAG_subprogram
))
13539 complaint (_("Child DIE %s and its abstract origin %s have "
13541 sect_offset_str (child_die
->sect_off
),
13542 sect_offset_str (child_origin_die
->sect_off
));
13543 if (child_origin_die
->parent
!= origin_die
)
13544 complaint (_("Child DIE %s and its abstract origin %s have "
13545 "different parents"),
13546 sect_offset_str (child_die
->sect_off
),
13547 sect_offset_str (child_origin_die
->sect_off
));
13549 offsets
.push_back (child_origin_die
->sect_off
);
13552 std::sort (offsets
.begin (), offsets
.end ());
13553 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
13554 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
13555 if (offsetp
[-1] == *offsetp
)
13556 complaint (_("Multiple children of DIE %s refer "
13557 "to DIE %s as their abstract origin"),
13558 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
13560 offsetp
= offsets
.data ();
13561 origin_child_die
= origin_die
->child
;
13562 while (origin_child_die
&& origin_child_die
->tag
)
13564 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13565 while (offsetp
< offsets_end
13566 && *offsetp
< origin_child_die
->sect_off
)
13568 if (offsetp
>= offsets_end
13569 || *offsetp
> origin_child_die
->sect_off
)
13571 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13572 Check whether we're already processing ORIGIN_CHILD_DIE.
13573 This can happen with mutually referenced abstract_origins.
13575 if (!origin_child_die
->in_process
)
13576 process_die (origin_child_die
, origin_cu
);
13578 origin_child_die
= sibling_die (origin_child_die
);
13580 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13584 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13586 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13587 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13588 struct context_stack
*newobj
;
13591 struct die_info
*child_die
;
13592 struct attribute
*attr
, *call_line
, *call_file
;
13594 CORE_ADDR baseaddr
;
13595 struct block
*block
;
13596 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13597 std::vector
<struct symbol
*> template_args
;
13598 struct template_symbol
*templ_func
= NULL
;
13602 /* If we do not have call site information, we can't show the
13603 caller of this inlined function. That's too confusing, so
13604 only use the scope for local variables. */
13605 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13606 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13607 if (call_line
== NULL
|| call_file
== NULL
)
13609 read_lexical_block_scope (die
, cu
);
13614 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13616 name
= dwarf2_name (die
, cu
);
13618 /* Ignore functions with missing or empty names. These are actually
13619 illegal according to the DWARF standard. */
13622 complaint (_("missing name for subprogram DIE at %s"),
13623 sect_offset_str (die
->sect_off
));
13627 /* Ignore functions with missing or invalid low and high pc attributes. */
13628 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13629 <= PC_BOUNDS_INVALID
)
13631 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13632 if (!attr
|| !DW_UNSND (attr
))
13633 complaint (_("cannot get low and high bounds "
13634 "for subprogram DIE at %s"),
13635 sect_offset_str (die
->sect_off
));
13639 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13640 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13642 /* If we have any template arguments, then we must allocate a
13643 different sort of symbol. */
13644 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
13646 if (child_die
->tag
== DW_TAG_template_type_param
13647 || child_die
->tag
== DW_TAG_template_value_param
)
13649 templ_func
= allocate_template_symbol (objfile
);
13650 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13655 newobj
= cu
->builder
->push_context (0, lowpc
);
13656 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13657 (struct symbol
*) templ_func
);
13659 /* If there is a location expression for DW_AT_frame_base, record
13661 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13663 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13665 /* If there is a location for the static link, record it. */
13666 newobj
->static_link
= NULL
;
13667 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13670 newobj
->static_link
13671 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13672 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
13675 cu
->list_in_scope
= cu
->builder
->get_local_symbols ();
13677 if (die
->child
!= NULL
)
13679 child_die
= die
->child
;
13680 while (child_die
&& child_die
->tag
)
13682 if (child_die
->tag
== DW_TAG_template_type_param
13683 || child_die
->tag
== DW_TAG_template_value_param
)
13685 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13688 template_args
.push_back (arg
);
13691 process_die (child_die
, cu
);
13692 child_die
= sibling_die (child_die
);
13696 inherit_abstract_dies (die
, cu
);
13698 /* If we have a DW_AT_specification, we might need to import using
13699 directives from the context of the specification DIE. See the
13700 comment in determine_prefix. */
13701 if (cu
->language
== language_cplus
13702 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13704 struct dwarf2_cu
*spec_cu
= cu
;
13705 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13709 child_die
= spec_die
->child
;
13710 while (child_die
&& child_die
->tag
)
13712 if (child_die
->tag
== DW_TAG_imported_module
)
13713 process_die (child_die
, spec_cu
);
13714 child_die
= sibling_die (child_die
);
13717 /* In some cases, GCC generates specification DIEs that
13718 themselves contain DW_AT_specification attributes. */
13719 spec_die
= die_specification (spec_die
, &spec_cu
);
13723 struct context_stack cstk
= cu
->builder
->pop_context ();
13724 /* Make a block for the local symbols within. */
13725 block
= cu
->builder
->finish_block (cstk
.name
, cstk
.old_blocks
,
13726 cstk
.static_link
, lowpc
, highpc
);
13728 /* For C++, set the block's scope. */
13729 if ((cu
->language
== language_cplus
13730 || cu
->language
== language_fortran
13731 || cu
->language
== language_d
13732 || cu
->language
== language_rust
)
13733 && cu
->processing_has_namespace_info
)
13734 block_set_scope (block
, determine_prefix (die
, cu
),
13735 &objfile
->objfile_obstack
);
13737 /* If we have address ranges, record them. */
13738 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13740 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
13742 /* Attach template arguments to function. */
13743 if (!template_args
.empty ())
13745 gdb_assert (templ_func
!= NULL
);
13747 templ_func
->n_template_arguments
= template_args
.size ();
13748 templ_func
->template_arguments
13749 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13750 templ_func
->n_template_arguments
);
13751 memcpy (templ_func
->template_arguments
,
13752 template_args
.data (),
13753 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13755 /* Make sure that the symtab is set on the new symbols. Even
13756 though they don't appear in this symtab directly, other parts
13757 of gdb assume that symbols do, and this is reasonably
13759 for (struct symbol
*sym
: template_args
)
13760 symbol_set_symtab (sym
, symbol_symtab (templ_func
));
13763 /* In C++, we can have functions nested inside functions (e.g., when
13764 a function declares a class that has methods). This means that
13765 when we finish processing a function scope, we may need to go
13766 back to building a containing block's symbol lists. */
13767 *cu
->builder
->get_local_symbols () = cstk
.locals
;
13768 cu
->builder
->set_local_using_directives (cstk
.local_using_directives
);
13770 /* If we've finished processing a top-level function, subsequent
13771 symbols go in the file symbol list. */
13772 if (cu
->builder
->outermost_context_p ())
13773 cu
->list_in_scope
= cu
->builder
->get_file_symbols ();
13776 /* Process all the DIES contained within a lexical block scope. Start
13777 a new scope, process the dies, and then close the scope. */
13780 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13782 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13783 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13784 CORE_ADDR lowpc
, highpc
;
13785 struct die_info
*child_die
;
13786 CORE_ADDR baseaddr
;
13788 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13790 /* Ignore blocks with missing or invalid low and high pc attributes. */
13791 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13792 as multiple lexical blocks? Handling children in a sane way would
13793 be nasty. Might be easier to properly extend generic blocks to
13794 describe ranges. */
13795 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13797 case PC_BOUNDS_NOT_PRESENT
:
13798 /* DW_TAG_lexical_block has no attributes, process its children as if
13799 there was no wrapping by that DW_TAG_lexical_block.
13800 GCC does no longer produces such DWARF since GCC r224161. */
13801 for (child_die
= die
->child
;
13802 child_die
!= NULL
&& child_die
->tag
;
13803 child_die
= sibling_die (child_die
))
13804 process_die (child_die
, cu
);
13806 case PC_BOUNDS_INVALID
:
13809 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13810 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13812 cu
->builder
->push_context (0, lowpc
);
13813 if (die
->child
!= NULL
)
13815 child_die
= die
->child
;
13816 while (child_die
&& child_die
->tag
)
13818 process_die (child_die
, cu
);
13819 child_die
= sibling_die (child_die
);
13822 inherit_abstract_dies (die
, cu
);
13823 struct context_stack cstk
= cu
->builder
->pop_context ();
13825 if (*cu
->builder
->get_local_symbols () != NULL
13826 || (*cu
->builder
->get_local_using_directives ()) != NULL
)
13828 struct block
*block
13829 = cu
->builder
->finish_block (0, cstk
.old_blocks
, NULL
,
13830 cstk
.start_addr
, highpc
);
13832 /* Note that recording ranges after traversing children, as we
13833 do here, means that recording a parent's ranges entails
13834 walking across all its children's ranges as they appear in
13835 the address map, which is quadratic behavior.
13837 It would be nicer to record the parent's ranges before
13838 traversing its children, simply overriding whatever you find
13839 there. But since we don't even decide whether to create a
13840 block until after we've traversed its children, that's hard
13842 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13844 *cu
->builder
->get_local_symbols () = cstk
.locals
;
13845 cu
->builder
->set_local_using_directives (cstk
.local_using_directives
);
13848 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13851 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13853 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13854 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13855 CORE_ADDR pc
, baseaddr
;
13856 struct attribute
*attr
;
13857 struct call_site
*call_site
, call_site_local
;
13860 struct die_info
*child_die
;
13862 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13864 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13867 /* This was a pre-DWARF-5 GNU extension alias
13868 for DW_AT_call_return_pc. */
13869 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13873 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13874 "DIE %s [in module %s]"),
13875 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13878 pc
= attr_value_as_address (attr
) + baseaddr
;
13879 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13881 if (cu
->call_site_htab
== NULL
)
13882 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13883 NULL
, &objfile
->objfile_obstack
,
13884 hashtab_obstack_allocate
, NULL
);
13885 call_site_local
.pc
= pc
;
13886 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13889 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13890 "DIE %s [in module %s]"),
13891 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13892 objfile_name (objfile
));
13896 /* Count parameters at the caller. */
13899 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13900 child_die
= sibling_die (child_die
))
13902 if (child_die
->tag
!= DW_TAG_call_site_parameter
13903 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13905 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
13906 "DW_TAG_call_site child DIE %s [in module %s]"),
13907 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13908 objfile_name (objfile
));
13916 = ((struct call_site
*)
13917 obstack_alloc (&objfile
->objfile_obstack
,
13918 sizeof (*call_site
)
13919 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13921 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13922 call_site
->pc
= pc
;
13924 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13925 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13927 struct die_info
*func_die
;
13929 /* Skip also over DW_TAG_inlined_subroutine. */
13930 for (func_die
= die
->parent
;
13931 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13932 && func_die
->tag
!= DW_TAG_subroutine_type
;
13933 func_die
= func_die
->parent
);
13935 /* DW_AT_call_all_calls is a superset
13936 of DW_AT_call_all_tail_calls. */
13938 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13939 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13940 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13941 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13943 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13944 not complete. But keep CALL_SITE for look ups via call_site_htab,
13945 both the initial caller containing the real return address PC and
13946 the final callee containing the current PC of a chain of tail
13947 calls do not need to have the tail call list complete. But any
13948 function candidate for a virtual tail call frame searched via
13949 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13950 determined unambiguously. */
13954 struct type
*func_type
= NULL
;
13957 func_type
= get_die_type (func_die
, cu
);
13958 if (func_type
!= NULL
)
13960 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
13962 /* Enlist this call site to the function. */
13963 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13964 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13967 complaint (_("Cannot find function owning DW_TAG_call_site "
13968 "DIE %s [in module %s]"),
13969 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13973 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13975 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13977 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13980 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13981 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13983 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
13984 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
13985 /* Keep NULL DWARF_BLOCK. */;
13986 else if (attr_form_is_block (attr
))
13988 struct dwarf2_locexpr_baton
*dlbaton
;
13990 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13991 dlbaton
->data
= DW_BLOCK (attr
)->data
;
13992 dlbaton
->size
= DW_BLOCK (attr
)->size
;
13993 dlbaton
->per_cu
= cu
->per_cu
;
13995 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
13997 else if (attr_form_is_ref (attr
))
13999 struct dwarf2_cu
*target_cu
= cu
;
14000 struct die_info
*target_die
;
14002 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14003 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
14004 if (die_is_declaration (target_die
, target_cu
))
14006 const char *target_physname
;
14008 /* Prefer the mangled name; otherwise compute the demangled one. */
14009 target_physname
= dw2_linkage_name (target_die
, target_cu
);
14010 if (target_physname
== NULL
)
14011 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
14012 if (target_physname
== NULL
)
14013 complaint (_("DW_AT_call_target target DIE has invalid "
14014 "physname, for referencing DIE %s [in module %s]"),
14015 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14017 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
14023 /* DW_AT_entry_pc should be preferred. */
14024 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
14025 <= PC_BOUNDS_INVALID
)
14026 complaint (_("DW_AT_call_target target DIE has invalid "
14027 "low pc, for referencing DIE %s [in module %s]"),
14028 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14031 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
14032 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
14037 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
14038 "block nor reference, for DIE %s [in module %s]"),
14039 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14041 call_site
->per_cu
= cu
->per_cu
;
14043 for (child_die
= die
->child
;
14044 child_die
&& child_die
->tag
;
14045 child_die
= sibling_die (child_die
))
14047 struct call_site_parameter
*parameter
;
14048 struct attribute
*loc
, *origin
;
14050 if (child_die
->tag
!= DW_TAG_call_site_parameter
14051 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14053 /* Already printed the complaint above. */
14057 gdb_assert (call_site
->parameter_count
< nparams
);
14058 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
14060 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
14061 specifies DW_TAG_formal_parameter. Value of the data assumed for the
14062 register is contained in DW_AT_call_value. */
14064 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
14065 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
14066 if (origin
== NULL
)
14068 /* This was a pre-DWARF-5 GNU extension alias
14069 for DW_AT_call_parameter. */
14070 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
14072 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
14074 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
14076 sect_offset sect_off
14077 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
14078 if (!offset_in_cu_p (&cu
->header
, sect_off
))
14080 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
14081 binding can be done only inside one CU. Such referenced DIE
14082 therefore cannot be even moved to DW_TAG_partial_unit. */
14083 complaint (_("DW_AT_call_parameter offset is not in CU for "
14084 "DW_TAG_call_site child DIE %s [in module %s]"),
14085 sect_offset_str (child_die
->sect_off
),
14086 objfile_name (objfile
));
14089 parameter
->u
.param_cu_off
14090 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
14092 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
14094 complaint (_("No DW_FORM_block* DW_AT_location for "
14095 "DW_TAG_call_site child DIE %s [in module %s]"),
14096 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
14101 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
14102 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
14103 if (parameter
->u
.dwarf_reg
!= -1)
14104 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
14105 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
14106 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
14107 ¶meter
->u
.fb_offset
))
14108 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
14111 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
14112 "for DW_FORM_block* DW_AT_location is supported for "
14113 "DW_TAG_call_site child DIE %s "
14115 sect_offset_str (child_die
->sect_off
),
14116 objfile_name (objfile
));
14121 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
14123 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
14124 if (!attr_form_is_block (attr
))
14126 complaint (_("No DW_FORM_block* DW_AT_call_value for "
14127 "DW_TAG_call_site child DIE %s [in module %s]"),
14128 sect_offset_str (child_die
->sect_off
),
14129 objfile_name (objfile
));
14132 parameter
->value
= DW_BLOCK (attr
)->data
;
14133 parameter
->value_size
= DW_BLOCK (attr
)->size
;
14135 /* Parameters are not pre-cleared by memset above. */
14136 parameter
->data_value
= NULL
;
14137 parameter
->data_value_size
= 0;
14138 call_site
->parameter_count
++;
14140 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
14142 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
14145 if (!attr_form_is_block (attr
))
14146 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
14147 "DW_TAG_call_site child DIE %s [in module %s]"),
14148 sect_offset_str (child_die
->sect_off
),
14149 objfile_name (objfile
));
14152 parameter
->data_value
= DW_BLOCK (attr
)->data
;
14153 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
14159 /* Helper function for read_variable. If DIE represents a virtual
14160 table, then return the type of the concrete object that is
14161 associated with the virtual table. Otherwise, return NULL. */
14163 static struct type
*
14164 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14166 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14170 /* Find the type DIE. */
14171 struct die_info
*type_die
= NULL
;
14172 struct dwarf2_cu
*type_cu
= cu
;
14174 if (attr_form_is_ref (attr
))
14175 type_die
= follow_die_ref (die
, attr
, &type_cu
);
14176 if (type_die
== NULL
)
14179 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
14181 return die_containing_type (type_die
, type_cu
);
14184 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
14187 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
14189 struct rust_vtable_symbol
*storage
= NULL
;
14191 if (cu
->language
== language_rust
)
14193 struct type
*containing_type
= rust_containing_type (die
, cu
);
14195 if (containing_type
!= NULL
)
14197 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14199 storage
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
14200 struct rust_vtable_symbol
);
14201 initialize_objfile_symbol (storage
);
14202 storage
->concrete_type
= containing_type
;
14203 storage
->subclass
= SYMBOL_RUST_VTABLE
;
14207 new_symbol (die
, NULL
, cu
, storage
);
14210 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
14211 reading .debug_rnglists.
14212 Callback's type should be:
14213 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14214 Return true if the attributes are present and valid, otherwise,
14217 template <typename Callback
>
14219 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
14220 Callback
&&callback
)
14222 struct dwarf2_per_objfile
*dwarf2_per_objfile
14223 = cu
->per_cu
->dwarf2_per_objfile
;
14224 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14225 bfd
*obfd
= objfile
->obfd
;
14226 /* Base address selection entry. */
14229 const gdb_byte
*buffer
;
14230 CORE_ADDR baseaddr
;
14231 bool overflow
= false;
14233 found_base
= cu
->base_known
;
14234 base
= cu
->base_address
;
14236 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
14237 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
14239 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14243 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
14245 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14249 /* Initialize it due to a false compiler warning. */
14250 CORE_ADDR range_beginning
= 0, range_end
= 0;
14251 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
14252 + dwarf2_per_objfile
->rnglists
.size
);
14253 unsigned int bytes_read
;
14255 if (buffer
== buf_end
)
14260 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
14263 case DW_RLE_end_of_list
:
14265 case DW_RLE_base_address
:
14266 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14271 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14273 buffer
+= bytes_read
;
14275 case DW_RLE_start_length
:
14276 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14281 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14282 buffer
+= bytes_read
;
14283 range_end
= (range_beginning
14284 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
14285 buffer
+= bytes_read
;
14286 if (buffer
> buf_end
)
14292 case DW_RLE_offset_pair
:
14293 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14294 buffer
+= bytes_read
;
14295 if (buffer
> buf_end
)
14300 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14301 buffer
+= bytes_read
;
14302 if (buffer
> buf_end
)
14308 case DW_RLE_start_end
:
14309 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
14314 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14315 buffer
+= bytes_read
;
14316 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14317 buffer
+= bytes_read
;
14320 complaint (_("Invalid .debug_rnglists data (no base address)"));
14323 if (rlet
== DW_RLE_end_of_list
|| overflow
)
14325 if (rlet
== DW_RLE_base_address
)
14330 /* We have no valid base address for the ranges
14332 complaint (_("Invalid .debug_rnglists data (no base address)"));
14336 if (range_beginning
> range_end
)
14338 /* Inverted range entries are invalid. */
14339 complaint (_("Invalid .debug_rnglists data (inverted range)"));
14343 /* Empty range entries have no effect. */
14344 if (range_beginning
== range_end
)
14347 range_beginning
+= base
;
14350 /* A not-uncommon case of bad debug info.
14351 Don't pollute the addrmap with bad data. */
14352 if (range_beginning
+ baseaddr
== 0
14353 && !dwarf2_per_objfile
->has_section_at_zero
)
14355 complaint (_(".debug_rnglists entry has start address of zero"
14356 " [in module %s]"), objfile_name (objfile
));
14360 callback (range_beginning
, range_end
);
14365 complaint (_("Offset %d is not terminated "
14366 "for DW_AT_ranges attribute"),
14374 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
14375 Callback's type should be:
14376 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14377 Return 1 if the attributes are present and valid, otherwise, return 0. */
14379 template <typename Callback
>
14381 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
14382 Callback
&&callback
)
14384 struct dwarf2_per_objfile
*dwarf2_per_objfile
14385 = cu
->per_cu
->dwarf2_per_objfile
;
14386 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14387 struct comp_unit_head
*cu_header
= &cu
->header
;
14388 bfd
*obfd
= objfile
->obfd
;
14389 unsigned int addr_size
= cu_header
->addr_size
;
14390 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14391 /* Base address selection entry. */
14394 unsigned int dummy
;
14395 const gdb_byte
*buffer
;
14396 CORE_ADDR baseaddr
;
14398 if (cu_header
->version
>= 5)
14399 return dwarf2_rnglists_process (offset
, cu
, callback
);
14401 found_base
= cu
->base_known
;
14402 base
= cu
->base_address
;
14404 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
14405 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
14407 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14411 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
14413 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14417 CORE_ADDR range_beginning
, range_end
;
14419 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
14420 buffer
+= addr_size
;
14421 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
14422 buffer
+= addr_size
;
14423 offset
+= 2 * addr_size
;
14425 /* An end of list marker is a pair of zero addresses. */
14426 if (range_beginning
== 0 && range_end
== 0)
14427 /* Found the end of list entry. */
14430 /* Each base address selection entry is a pair of 2 values.
14431 The first is the largest possible address, the second is
14432 the base address. Check for a base address here. */
14433 if ((range_beginning
& mask
) == mask
)
14435 /* If we found the largest possible address, then we already
14436 have the base address in range_end. */
14444 /* We have no valid base address for the ranges
14446 complaint (_("Invalid .debug_ranges data (no base address)"));
14450 if (range_beginning
> range_end
)
14452 /* Inverted range entries are invalid. */
14453 complaint (_("Invalid .debug_ranges data (inverted range)"));
14457 /* Empty range entries have no effect. */
14458 if (range_beginning
== range_end
)
14461 range_beginning
+= base
;
14464 /* A not-uncommon case of bad debug info.
14465 Don't pollute the addrmap with bad data. */
14466 if (range_beginning
+ baseaddr
== 0
14467 && !dwarf2_per_objfile
->has_section_at_zero
)
14469 complaint (_(".debug_ranges entry has start address of zero"
14470 " [in module %s]"), objfile_name (objfile
));
14474 callback (range_beginning
, range_end
);
14480 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
14481 Return 1 if the attributes are present and valid, otherwise, return 0.
14482 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
14485 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
14486 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
14487 struct partial_symtab
*ranges_pst
)
14489 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14490 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14491 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
14492 SECT_OFF_TEXT (objfile
));
14495 CORE_ADDR high
= 0;
14498 retval
= dwarf2_ranges_process (offset
, cu
,
14499 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
14501 if (ranges_pst
!= NULL
)
14506 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14507 range_beginning
+ baseaddr
)
14509 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14510 range_end
+ baseaddr
)
14512 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
14516 /* FIXME: This is recording everything as a low-high
14517 segment of consecutive addresses. We should have a
14518 data structure for discontiguous block ranges
14522 low
= range_beginning
;
14528 if (range_beginning
< low
)
14529 low
= range_beginning
;
14530 if (range_end
> high
)
14538 /* If the first entry is an end-of-list marker, the range
14539 describes an empty scope, i.e. no instructions. */
14545 *high_return
= high
;
14549 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14550 definition for the return value. *LOWPC and *HIGHPC are set iff
14551 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14553 static enum pc_bounds_kind
14554 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14555 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14556 struct partial_symtab
*pst
)
14558 struct dwarf2_per_objfile
*dwarf2_per_objfile
14559 = cu
->per_cu
->dwarf2_per_objfile
;
14560 struct attribute
*attr
;
14561 struct attribute
*attr_high
;
14563 CORE_ADDR high
= 0;
14564 enum pc_bounds_kind ret
;
14566 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14569 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14572 low
= attr_value_as_address (attr
);
14573 high
= attr_value_as_address (attr_high
);
14574 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14578 /* Found high w/o low attribute. */
14579 return PC_BOUNDS_INVALID
;
14581 /* Found consecutive range of addresses. */
14582 ret
= PC_BOUNDS_HIGH_LOW
;
14586 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14589 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14590 We take advantage of the fact that DW_AT_ranges does not appear
14591 in DW_TAG_compile_unit of DWO files. */
14592 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14593 unsigned int ranges_offset
= (DW_UNSND (attr
)
14594 + (need_ranges_base
14598 /* Value of the DW_AT_ranges attribute is the offset in the
14599 .debug_ranges section. */
14600 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
14601 return PC_BOUNDS_INVALID
;
14602 /* Found discontinuous range of addresses. */
14603 ret
= PC_BOUNDS_RANGES
;
14606 return PC_BOUNDS_NOT_PRESENT
;
14609 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14611 return PC_BOUNDS_INVALID
;
14613 /* When using the GNU linker, .gnu.linkonce. sections are used to
14614 eliminate duplicate copies of functions and vtables and such.
14615 The linker will arbitrarily choose one and discard the others.
14616 The AT_*_pc values for such functions refer to local labels in
14617 these sections. If the section from that file was discarded, the
14618 labels are not in the output, so the relocs get a value of 0.
14619 If this is a discarded function, mark the pc bounds as invalid,
14620 so that GDB will ignore it. */
14621 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14622 return PC_BOUNDS_INVALID
;
14630 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14631 its low and high PC addresses. Do nothing if these addresses could not
14632 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14633 and HIGHPC to the high address if greater than HIGHPC. */
14636 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14637 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14638 struct dwarf2_cu
*cu
)
14640 CORE_ADDR low
, high
;
14641 struct die_info
*child
= die
->child
;
14643 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14645 *lowpc
= std::min (*lowpc
, low
);
14646 *highpc
= std::max (*highpc
, high
);
14649 /* If the language does not allow nested subprograms (either inside
14650 subprograms or lexical blocks), we're done. */
14651 if (cu
->language
!= language_ada
)
14654 /* Check all the children of the given DIE. If it contains nested
14655 subprograms, then check their pc bounds. Likewise, we need to
14656 check lexical blocks as well, as they may also contain subprogram
14658 while (child
&& child
->tag
)
14660 if (child
->tag
== DW_TAG_subprogram
14661 || child
->tag
== DW_TAG_lexical_block
)
14662 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14663 child
= sibling_die (child
);
14667 /* Get the low and high pc's represented by the scope DIE, and store
14668 them in *LOWPC and *HIGHPC. If the correct values can't be
14669 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14672 get_scope_pc_bounds (struct die_info
*die
,
14673 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14674 struct dwarf2_cu
*cu
)
14676 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14677 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14678 CORE_ADDR current_low
, current_high
;
14680 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14681 >= PC_BOUNDS_RANGES
)
14683 best_low
= current_low
;
14684 best_high
= current_high
;
14688 struct die_info
*child
= die
->child
;
14690 while (child
&& child
->tag
)
14692 switch (child
->tag
) {
14693 case DW_TAG_subprogram
:
14694 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14696 case DW_TAG_namespace
:
14697 case DW_TAG_module
:
14698 /* FIXME: carlton/2004-01-16: Should we do this for
14699 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14700 that current GCC's always emit the DIEs corresponding
14701 to definitions of methods of classes as children of a
14702 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14703 the DIEs giving the declarations, which could be
14704 anywhere). But I don't see any reason why the
14705 standards says that they have to be there. */
14706 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14708 if (current_low
!= ((CORE_ADDR
) -1))
14710 best_low
= std::min (best_low
, current_low
);
14711 best_high
= std::max (best_high
, current_high
);
14719 child
= sibling_die (child
);
14724 *highpc
= best_high
;
14727 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14731 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14732 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14734 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14735 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14736 struct attribute
*attr
;
14737 struct attribute
*attr_high
;
14739 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14742 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14745 CORE_ADDR low
= attr_value_as_address (attr
);
14746 CORE_ADDR high
= attr_value_as_address (attr_high
);
14748 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14751 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14752 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14753 cu
->builder
->record_block_range (block
, low
, high
- 1);
14757 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14760 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14761 We take advantage of the fact that DW_AT_ranges does not appear
14762 in DW_TAG_compile_unit of DWO files. */
14763 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14765 /* The value of the DW_AT_ranges attribute is the offset of the
14766 address range list in the .debug_ranges section. */
14767 unsigned long offset
= (DW_UNSND (attr
)
14768 + (need_ranges_base
? cu
->ranges_base
: 0));
14770 dwarf2_ranges_process (offset
, cu
,
14771 [&] (CORE_ADDR start
, CORE_ADDR end
)
14775 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14776 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14777 cu
->builder
->record_block_range (block
, start
, end
- 1);
14782 /* Check whether the producer field indicates either of GCC < 4.6, or the
14783 Intel C/C++ compiler, and cache the result in CU. */
14786 check_producer (struct dwarf2_cu
*cu
)
14790 if (cu
->producer
== NULL
)
14792 /* For unknown compilers expect their behavior is DWARF version
14795 GCC started to support .debug_types sections by -gdwarf-4 since
14796 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14797 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14798 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14799 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14801 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14803 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14804 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14806 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14807 cu
->producer_is_icc_lt_14
= major
< 14;
14810 /* For other non-GCC compilers, expect their behavior is DWARF version
14814 cu
->checked_producer
= 1;
14817 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14818 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14819 during 4.6.0 experimental. */
14822 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14824 if (!cu
->checked_producer
)
14825 check_producer (cu
);
14827 return cu
->producer_is_gxx_lt_4_6
;
14830 /* Return the default accessibility type if it is not overriden by
14831 DW_AT_accessibility. */
14833 static enum dwarf_access_attribute
14834 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14836 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14838 /* The default DWARF 2 accessibility for members is public, the default
14839 accessibility for inheritance is private. */
14841 if (die
->tag
!= DW_TAG_inheritance
)
14842 return DW_ACCESS_public
;
14844 return DW_ACCESS_private
;
14848 /* DWARF 3+ defines the default accessibility a different way. The same
14849 rules apply now for DW_TAG_inheritance as for the members and it only
14850 depends on the container kind. */
14852 if (die
->parent
->tag
== DW_TAG_class_type
)
14853 return DW_ACCESS_private
;
14855 return DW_ACCESS_public
;
14859 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14860 offset. If the attribute was not found return 0, otherwise return
14861 1. If it was found but could not properly be handled, set *OFFSET
14865 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14868 struct attribute
*attr
;
14870 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14875 /* Note that we do not check for a section offset first here.
14876 This is because DW_AT_data_member_location is new in DWARF 4,
14877 so if we see it, we can assume that a constant form is really
14878 a constant and not a section offset. */
14879 if (attr_form_is_constant (attr
))
14880 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
14881 else if (attr_form_is_section_offset (attr
))
14882 dwarf2_complex_location_expr_complaint ();
14883 else if (attr_form_is_block (attr
))
14884 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14886 dwarf2_complex_location_expr_complaint ();
14894 /* Add an aggregate field to the field list. */
14897 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14898 struct dwarf2_cu
*cu
)
14900 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14901 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14902 struct nextfield
*new_field
;
14903 struct attribute
*attr
;
14905 const char *fieldname
= "";
14907 if (die
->tag
== DW_TAG_inheritance
)
14909 fip
->baseclasses
.emplace_back ();
14910 new_field
= &fip
->baseclasses
.back ();
14914 fip
->fields
.emplace_back ();
14915 new_field
= &fip
->fields
.back ();
14920 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14922 new_field
->accessibility
= DW_UNSND (attr
);
14924 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
14925 if (new_field
->accessibility
!= DW_ACCESS_public
)
14926 fip
->non_public_fields
= 1;
14928 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14930 new_field
->virtuality
= DW_UNSND (attr
);
14932 new_field
->virtuality
= DW_VIRTUALITY_none
;
14934 fp
= &new_field
->field
;
14936 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
14940 /* Data member other than a C++ static data member. */
14942 /* Get type of field. */
14943 fp
->type
= die_type (die
, cu
);
14945 SET_FIELD_BITPOS (*fp
, 0);
14947 /* Get bit size of field (zero if none). */
14948 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
14951 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
14955 FIELD_BITSIZE (*fp
) = 0;
14958 /* Get bit offset of field. */
14959 if (handle_data_member_location (die
, cu
, &offset
))
14960 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
14961 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
14964 if (gdbarch_bits_big_endian (gdbarch
))
14966 /* For big endian bits, the DW_AT_bit_offset gives the
14967 additional bit offset from the MSB of the containing
14968 anonymous object to the MSB of the field. We don't
14969 have to do anything special since we don't need to
14970 know the size of the anonymous object. */
14971 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
14975 /* For little endian bits, compute the bit offset to the
14976 MSB of the anonymous object, subtract off the number of
14977 bits from the MSB of the field to the MSB of the
14978 object, and then subtract off the number of bits of
14979 the field itself. The result is the bit offset of
14980 the LSB of the field. */
14981 int anonymous_size
;
14982 int bit_offset
= DW_UNSND (attr
);
14984 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14987 /* The size of the anonymous object containing
14988 the bit field is explicit, so use the
14989 indicated size (in bytes). */
14990 anonymous_size
= DW_UNSND (attr
);
14994 /* The size of the anonymous object containing
14995 the bit field must be inferred from the type
14996 attribute of the data member containing the
14998 anonymous_size
= TYPE_LENGTH (fp
->type
);
15000 SET_FIELD_BITPOS (*fp
,
15001 (FIELD_BITPOS (*fp
)
15002 + anonymous_size
* bits_per_byte
15003 - bit_offset
- FIELD_BITSIZE (*fp
)));
15006 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
15008 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
15009 + dwarf2_get_attr_constant_value (attr
, 0)));
15011 /* Get name of field. */
15012 fieldname
= dwarf2_name (die
, cu
);
15013 if (fieldname
== NULL
)
15016 /* The name is already allocated along with this objfile, so we don't
15017 need to duplicate it for the type. */
15018 fp
->name
= fieldname
;
15020 /* Change accessibility for artificial fields (e.g. virtual table
15021 pointer or virtual base class pointer) to private. */
15022 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
15024 FIELD_ARTIFICIAL (*fp
) = 1;
15025 new_field
->accessibility
= DW_ACCESS_private
;
15026 fip
->non_public_fields
= 1;
15029 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
15031 /* C++ static member. */
15033 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
15034 is a declaration, but all versions of G++ as of this writing
15035 (so through at least 3.2.1) incorrectly generate
15036 DW_TAG_variable tags. */
15038 const char *physname
;
15040 /* Get name of field. */
15041 fieldname
= dwarf2_name (die
, cu
);
15042 if (fieldname
== NULL
)
15045 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15047 /* Only create a symbol if this is an external value.
15048 new_symbol checks this and puts the value in the global symbol
15049 table, which we want. If it is not external, new_symbol
15050 will try to put the value in cu->list_in_scope which is wrong. */
15051 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
15053 /* A static const member, not much different than an enum as far as
15054 we're concerned, except that we can support more types. */
15055 new_symbol (die
, NULL
, cu
);
15058 /* Get physical name. */
15059 physname
= dwarf2_physname (fieldname
, die
, cu
);
15061 /* The name is already allocated along with this objfile, so we don't
15062 need to duplicate it for the type. */
15063 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
15064 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15065 FIELD_NAME (*fp
) = fieldname
;
15067 else if (die
->tag
== DW_TAG_inheritance
)
15071 /* C++ base class field. */
15072 if (handle_data_member_location (die
, cu
, &offset
))
15073 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15074 FIELD_BITSIZE (*fp
) = 0;
15075 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15076 FIELD_NAME (*fp
) = TYPE_NAME (fp
->type
);
15078 else if (die
->tag
== DW_TAG_variant_part
)
15080 /* process_structure_scope will treat this DIE as a union. */
15081 process_structure_scope (die
, cu
);
15083 /* The variant part is relative to the start of the enclosing
15085 SET_FIELD_BITPOS (*fp
, 0);
15086 fp
->type
= get_die_type (die
, cu
);
15087 fp
->artificial
= 1;
15088 fp
->name
= "<<variant>>";
15091 gdb_assert_not_reached ("missing case in dwarf2_add_field");
15094 /* Can the type given by DIE define another type? */
15097 type_can_define_types (const struct die_info
*die
)
15101 case DW_TAG_typedef
:
15102 case DW_TAG_class_type
:
15103 case DW_TAG_structure_type
:
15104 case DW_TAG_union_type
:
15105 case DW_TAG_enumeration_type
:
15113 /* Add a type definition defined in the scope of the FIP's class. */
15116 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
15117 struct dwarf2_cu
*cu
)
15119 struct decl_field fp
;
15120 memset (&fp
, 0, sizeof (fp
));
15122 gdb_assert (type_can_define_types (die
));
15124 /* Get name of field. NULL is okay here, meaning an anonymous type. */
15125 fp
.name
= dwarf2_name (die
, cu
);
15126 fp
.type
= read_type_die (die
, cu
);
15128 /* Save accessibility. */
15129 enum dwarf_access_attribute accessibility
;
15130 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15132 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15134 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15135 switch (accessibility
)
15137 case DW_ACCESS_public
:
15138 /* The assumed value if neither private nor protected. */
15140 case DW_ACCESS_private
:
15143 case DW_ACCESS_protected
:
15144 fp
.is_protected
= 1;
15147 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
15150 if (die
->tag
== DW_TAG_typedef
)
15151 fip
->typedef_field_list
.push_back (fp
);
15153 fip
->nested_types_list
.push_back (fp
);
15156 /* Create the vector of fields, and attach it to the type. */
15159 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
15160 struct dwarf2_cu
*cu
)
15162 int nfields
= fip
->nfields
;
15164 /* Record the field count, allocate space for the array of fields,
15165 and create blank accessibility bitfields if necessary. */
15166 TYPE_NFIELDS (type
) = nfields
;
15167 TYPE_FIELDS (type
) = (struct field
*)
15168 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
15170 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
15172 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15174 TYPE_FIELD_PRIVATE_BITS (type
) =
15175 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15176 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
15178 TYPE_FIELD_PROTECTED_BITS (type
) =
15179 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15180 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
15182 TYPE_FIELD_IGNORE_BITS (type
) =
15183 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15184 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
15187 /* If the type has baseclasses, allocate and clear a bit vector for
15188 TYPE_FIELD_VIRTUAL_BITS. */
15189 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
15191 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
15192 unsigned char *pointer
;
15194 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15195 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
15196 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
15197 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
15198 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
15201 if (TYPE_FLAG_DISCRIMINATED_UNION (type
))
15203 struct discriminant_info
*di
= alloc_discriminant_info (type
, -1, -1);
15205 for (int index
= 0; index
< nfields
; ++index
)
15207 struct nextfield
&field
= fip
->fields
[index
];
15209 if (field
.variant
.is_discriminant
)
15210 di
->discriminant_index
= index
;
15211 else if (field
.variant
.default_branch
)
15212 di
->default_index
= index
;
15214 di
->discriminants
[index
] = field
.variant
.discriminant_value
;
15218 /* Copy the saved-up fields into the field vector. */
15219 for (int i
= 0; i
< nfields
; ++i
)
15221 struct nextfield
&field
15222 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
15223 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
15225 TYPE_FIELD (type
, i
) = field
.field
;
15226 switch (field
.accessibility
)
15228 case DW_ACCESS_private
:
15229 if (cu
->language
!= language_ada
)
15230 SET_TYPE_FIELD_PRIVATE (type
, i
);
15233 case DW_ACCESS_protected
:
15234 if (cu
->language
!= language_ada
)
15235 SET_TYPE_FIELD_PROTECTED (type
, i
);
15238 case DW_ACCESS_public
:
15242 /* Unknown accessibility. Complain and treat it as public. */
15244 complaint (_("unsupported accessibility %d"),
15245 field
.accessibility
);
15249 if (i
< fip
->baseclasses
.size ())
15251 switch (field
.virtuality
)
15253 case DW_VIRTUALITY_virtual
:
15254 case DW_VIRTUALITY_pure_virtual
:
15255 if (cu
->language
== language_ada
)
15256 error (_("unexpected virtuality in component of Ada type"));
15257 SET_TYPE_FIELD_VIRTUAL (type
, i
);
15264 /* Return true if this member function is a constructor, false
15268 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
15270 const char *fieldname
;
15271 const char *type_name
;
15274 if (die
->parent
== NULL
)
15277 if (die
->parent
->tag
!= DW_TAG_structure_type
15278 && die
->parent
->tag
!= DW_TAG_union_type
15279 && die
->parent
->tag
!= DW_TAG_class_type
)
15282 fieldname
= dwarf2_name (die
, cu
);
15283 type_name
= dwarf2_name (die
->parent
, cu
);
15284 if (fieldname
== NULL
|| type_name
== NULL
)
15287 len
= strlen (fieldname
);
15288 return (strncmp (fieldname
, type_name
, len
) == 0
15289 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
15292 /* Add a member function to the proper fieldlist. */
15295 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15296 struct type
*type
, struct dwarf2_cu
*cu
)
15298 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15299 struct attribute
*attr
;
15301 struct fnfieldlist
*flp
= nullptr;
15302 struct fn_field
*fnp
;
15303 const char *fieldname
;
15304 struct type
*this_type
;
15305 enum dwarf_access_attribute accessibility
;
15307 if (cu
->language
== language_ada
)
15308 error (_("unexpected member function in Ada type"));
15310 /* Get name of member function. */
15311 fieldname
= dwarf2_name (die
, cu
);
15312 if (fieldname
== NULL
)
15315 /* Look up member function name in fieldlist. */
15316 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15318 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15320 flp
= &fip
->fnfieldlists
[i
];
15325 /* Create a new fnfieldlist if necessary. */
15326 if (flp
== nullptr)
15328 fip
->fnfieldlists
.emplace_back ();
15329 flp
= &fip
->fnfieldlists
.back ();
15330 flp
->name
= fieldname
;
15331 i
= fip
->fnfieldlists
.size () - 1;
15334 /* Create a new member function field and add it to the vector of
15336 flp
->fnfields
.emplace_back ();
15337 fnp
= &flp
->fnfields
.back ();
15339 /* Delay processing of the physname until later. */
15340 if (cu
->language
== language_cplus
)
15341 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15345 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15346 fnp
->physname
= physname
? physname
: "";
15349 fnp
->type
= alloc_type (objfile
);
15350 this_type
= read_type_die (die
, cu
);
15351 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
15353 int nparams
= TYPE_NFIELDS (this_type
);
15355 /* TYPE is the domain of this method, and THIS_TYPE is the type
15356 of the method itself (TYPE_CODE_METHOD). */
15357 smash_to_method_type (fnp
->type
, type
,
15358 TYPE_TARGET_TYPE (this_type
),
15359 TYPE_FIELDS (this_type
),
15360 TYPE_NFIELDS (this_type
),
15361 TYPE_VARARGS (this_type
));
15363 /* Handle static member functions.
15364 Dwarf2 has no clean way to discern C++ static and non-static
15365 member functions. G++ helps GDB by marking the first
15366 parameter for non-static member functions (which is the this
15367 pointer) as artificial. We obtain this information from
15368 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15369 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15370 fnp
->voffset
= VOFFSET_STATIC
;
15373 complaint (_("member function type missing for '%s'"),
15374 dwarf2_full_name (fieldname
, die
, cu
));
15376 /* Get fcontext from DW_AT_containing_type if present. */
15377 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15378 fnp
->fcontext
= die_containing_type (die
, cu
);
15380 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15381 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15383 /* Get accessibility. */
15384 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15386 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15388 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15389 switch (accessibility
)
15391 case DW_ACCESS_private
:
15392 fnp
->is_private
= 1;
15394 case DW_ACCESS_protected
:
15395 fnp
->is_protected
= 1;
15399 /* Check for artificial methods. */
15400 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15401 if (attr
&& DW_UNSND (attr
) != 0)
15402 fnp
->is_artificial
= 1;
15404 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15406 /* Get index in virtual function table if it is a virtual member
15407 function. For older versions of GCC, this is an offset in the
15408 appropriate virtual table, as specified by DW_AT_containing_type.
15409 For everyone else, it is an expression to be evaluated relative
15410 to the object address. */
15412 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15415 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
15417 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15419 /* Old-style GCC. */
15420 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15422 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15423 || (DW_BLOCK (attr
)->size
> 1
15424 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15425 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15427 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15428 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15429 dwarf2_complex_location_expr_complaint ();
15431 fnp
->voffset
/= cu
->header
.addr_size
;
15435 dwarf2_complex_location_expr_complaint ();
15437 if (!fnp
->fcontext
)
15439 /* If there is no `this' field and no DW_AT_containing_type,
15440 we cannot actually find a base class context for the
15442 if (TYPE_NFIELDS (this_type
) == 0
15443 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15445 complaint (_("cannot determine context for virtual member "
15446 "function \"%s\" (offset %s)"),
15447 fieldname
, sect_offset_str (die
->sect_off
));
15452 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15456 else if (attr_form_is_section_offset (attr
))
15458 dwarf2_complex_location_expr_complaint ();
15462 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15468 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15469 if (attr
&& DW_UNSND (attr
))
15471 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15472 complaint (_("Member function \"%s\" (offset %s) is virtual "
15473 "but the vtable offset is not specified"),
15474 fieldname
, sect_offset_str (die
->sect_off
));
15475 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15476 TYPE_CPLUS_DYNAMIC (type
) = 1;
15481 /* Create the vector of member function fields, and attach it to the type. */
15484 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15485 struct dwarf2_cu
*cu
)
15487 if (cu
->language
== language_ada
)
15488 error (_("unexpected member functions in Ada type"));
15490 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15491 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15493 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15495 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15497 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15498 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15500 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15501 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15502 fn_flp
->fn_fields
= (struct fn_field
*)
15503 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15505 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15506 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15509 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15512 /* Returns non-zero if NAME is the name of a vtable member in CU's
15513 language, zero otherwise. */
15515 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15517 static const char vptr
[] = "_vptr";
15519 /* Look for the C++ form of the vtable. */
15520 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15526 /* GCC outputs unnamed structures that are really pointers to member
15527 functions, with the ABI-specified layout. If TYPE describes
15528 such a structure, smash it into a member function type.
15530 GCC shouldn't do this; it should just output pointer to member DIEs.
15531 This is GCC PR debug/28767. */
15534 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15536 struct type
*pfn_type
, *self_type
, *new_type
;
15538 /* Check for a structure with no name and two children. */
15539 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15542 /* Check for __pfn and __delta members. */
15543 if (TYPE_FIELD_NAME (type
, 0) == NULL
15544 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15545 || TYPE_FIELD_NAME (type
, 1) == NULL
15546 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15549 /* Find the type of the method. */
15550 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15551 if (pfn_type
== NULL
15552 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15553 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15556 /* Look for the "this" argument. */
15557 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15558 if (TYPE_NFIELDS (pfn_type
) == 0
15559 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15560 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15563 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15564 new_type
= alloc_type (objfile
);
15565 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15566 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15567 TYPE_VARARGS (pfn_type
));
15568 smash_to_methodptr_type (type
, new_type
);
15571 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15572 appropriate error checking and issuing complaints if there is a
15576 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15578 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15580 if (attr
== nullptr)
15583 if (!attr_form_is_constant (attr
))
15585 complaint (_("DW_AT_alignment must have constant form"
15586 " - DIE at %s [in module %s]"),
15587 sect_offset_str (die
->sect_off
),
15588 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15593 if (attr
->form
== DW_FORM_sdata
)
15595 LONGEST val
= DW_SND (attr
);
15598 complaint (_("DW_AT_alignment value must not be negative"
15599 " - DIE at %s [in module %s]"),
15600 sect_offset_str (die
->sect_off
),
15601 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15607 align
= DW_UNSND (attr
);
15611 complaint (_("DW_AT_alignment value must not be zero"
15612 " - DIE at %s [in module %s]"),
15613 sect_offset_str (die
->sect_off
),
15614 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15617 if ((align
& (align
- 1)) != 0)
15619 complaint (_("DW_AT_alignment value must be a power of 2"
15620 " - DIE at %s [in module %s]"),
15621 sect_offset_str (die
->sect_off
),
15622 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15629 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15630 the alignment for TYPE. */
15633 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15636 if (!set_type_align (type
, get_alignment (cu
, die
)))
15637 complaint (_("DW_AT_alignment value too large"
15638 " - DIE at %s [in module %s]"),
15639 sect_offset_str (die
->sect_off
),
15640 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15643 /* Called when we find the DIE that starts a structure or union scope
15644 (definition) to create a type for the structure or union. Fill in
15645 the type's name and general properties; the members will not be
15646 processed until process_structure_scope. A symbol table entry for
15647 the type will also not be done until process_structure_scope (assuming
15648 the type has a name).
15650 NOTE: we need to call these functions regardless of whether or not the
15651 DIE has a DW_AT_name attribute, since it might be an anonymous
15652 structure or union. This gets the type entered into our set of
15653 user defined types. */
15655 static struct type
*
15656 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15658 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15660 struct attribute
*attr
;
15663 /* If the definition of this type lives in .debug_types, read that type.
15664 Don't follow DW_AT_specification though, that will take us back up
15665 the chain and we want to go down. */
15666 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
15669 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15671 /* The type's CU may not be the same as CU.
15672 Ensure TYPE is recorded with CU in die_type_hash. */
15673 return set_die_type (die
, type
, cu
);
15676 type
= alloc_type (objfile
);
15677 INIT_CPLUS_SPECIFIC (type
);
15679 name
= dwarf2_name (die
, cu
);
15682 if (cu
->language
== language_cplus
15683 || cu
->language
== language_d
15684 || cu
->language
== language_rust
)
15686 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15688 /* dwarf2_full_name might have already finished building the DIE's
15689 type. If so, there is no need to continue. */
15690 if (get_die_type (die
, cu
) != NULL
)
15691 return get_die_type (die
, cu
);
15693 TYPE_NAME (type
) = full_name
;
15697 /* The name is already allocated along with this objfile, so
15698 we don't need to duplicate it for the type. */
15699 TYPE_NAME (type
) = name
;
15703 if (die
->tag
== DW_TAG_structure_type
)
15705 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15707 else if (die
->tag
== DW_TAG_union_type
)
15709 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15711 else if (die
->tag
== DW_TAG_variant_part
)
15713 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15714 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
15718 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15721 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15722 TYPE_DECLARED_CLASS (type
) = 1;
15724 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15727 if (attr_form_is_constant (attr
))
15728 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15731 /* For the moment, dynamic type sizes are not supported
15732 by GDB's struct type. The actual size is determined
15733 on-demand when resolving the type of a given object,
15734 so set the type's length to zero for now. Otherwise,
15735 we record an expression as the length, and that expression
15736 could lead to a very large value, which could eventually
15737 lead to us trying to allocate that much memory when creating
15738 a value of that type. */
15739 TYPE_LENGTH (type
) = 0;
15744 TYPE_LENGTH (type
) = 0;
15747 maybe_set_alignment (cu
, die
, type
);
15749 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15751 /* ICC<14 does not output the required DW_AT_declaration on
15752 incomplete types, but gives them a size of zero. */
15753 TYPE_STUB (type
) = 1;
15756 TYPE_STUB_SUPPORTED (type
) = 1;
15758 if (die_is_declaration (die
, cu
))
15759 TYPE_STUB (type
) = 1;
15760 else if (attr
== NULL
&& die
->child
== NULL
15761 && producer_is_realview (cu
->producer
))
15762 /* RealView does not output the required DW_AT_declaration
15763 on incomplete types. */
15764 TYPE_STUB (type
) = 1;
15766 /* We need to add the type field to the die immediately so we don't
15767 infinitely recurse when dealing with pointers to the structure
15768 type within the structure itself. */
15769 set_die_type (die
, type
, cu
);
15771 /* set_die_type should be already done. */
15772 set_descriptive_type (type
, die
, cu
);
15777 /* A helper for process_structure_scope that handles a single member
15781 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15782 struct field_info
*fi
,
15783 std::vector
<struct symbol
*> *template_args
,
15784 struct dwarf2_cu
*cu
)
15786 if (child_die
->tag
== DW_TAG_member
15787 || child_die
->tag
== DW_TAG_variable
15788 || child_die
->tag
== DW_TAG_variant_part
)
15790 /* NOTE: carlton/2002-11-05: A C++ static data member
15791 should be a DW_TAG_member that is a declaration, but
15792 all versions of G++ as of this writing (so through at
15793 least 3.2.1) incorrectly generate DW_TAG_variable
15794 tags for them instead. */
15795 dwarf2_add_field (fi
, child_die
, cu
);
15797 else if (child_die
->tag
== DW_TAG_subprogram
)
15799 /* Rust doesn't have member functions in the C++ sense.
15800 However, it does emit ordinary functions as children
15801 of a struct DIE. */
15802 if (cu
->language
== language_rust
)
15803 read_func_scope (child_die
, cu
);
15806 /* C++ member function. */
15807 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15810 else if (child_die
->tag
== DW_TAG_inheritance
)
15812 /* C++ base class field. */
15813 dwarf2_add_field (fi
, child_die
, cu
);
15815 else if (type_can_define_types (child_die
))
15816 dwarf2_add_type_defn (fi
, child_die
, cu
);
15817 else if (child_die
->tag
== DW_TAG_template_type_param
15818 || child_die
->tag
== DW_TAG_template_value_param
)
15820 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15823 template_args
->push_back (arg
);
15825 else if (child_die
->tag
== DW_TAG_variant
)
15827 /* In a variant we want to get the discriminant and also add a
15828 field for our sole member child. */
15829 struct attribute
*discr
= dwarf2_attr (child_die
, DW_AT_discr_value
, cu
);
15831 for (struct die_info
*variant_child
= child_die
->child
;
15832 variant_child
!= NULL
;
15833 variant_child
= sibling_die (variant_child
))
15835 if (variant_child
->tag
== DW_TAG_member
)
15837 handle_struct_member_die (variant_child
, type
, fi
,
15838 template_args
, cu
);
15839 /* Only handle the one. */
15844 /* We don't handle this but we might as well report it if we see
15846 if (dwarf2_attr (child_die
, DW_AT_discr_list
, cu
) != nullptr)
15847 complaint (_("DW_AT_discr_list is not supported yet"
15848 " - DIE at %s [in module %s]"),
15849 sect_offset_str (child_die
->sect_off
),
15850 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15852 /* The first field was just added, so we can stash the
15853 discriminant there. */
15854 gdb_assert (!fi
->fields
.empty ());
15856 fi
->fields
.back ().variant
.default_branch
= true;
15858 fi
->fields
.back ().variant
.discriminant_value
= DW_UNSND (discr
);
15862 /* Finish creating a structure or union type, including filling in
15863 its members and creating a symbol for it. */
15866 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15868 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15869 struct die_info
*child_die
;
15872 type
= get_die_type (die
, cu
);
15874 type
= read_structure_type (die
, cu
);
15876 /* When reading a DW_TAG_variant_part, we need to notice when we
15877 read the discriminant member, so we can record it later in the
15878 discriminant_info. */
15879 bool is_variant_part
= TYPE_FLAG_DISCRIMINATED_UNION (type
);
15880 sect_offset discr_offset
;
15881 bool has_template_parameters
= false;
15883 if (is_variant_part
)
15885 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15888 /* Maybe it's a univariant form, an extension we support.
15889 In this case arrange not to check the offset. */
15890 is_variant_part
= false;
15892 else if (attr_form_is_ref (discr
))
15894 struct dwarf2_cu
*target_cu
= cu
;
15895 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15897 discr_offset
= target_die
->sect_off
;
15901 complaint (_("DW_AT_discr does not have DIE reference form"
15902 " - DIE at %s [in module %s]"),
15903 sect_offset_str (die
->sect_off
),
15904 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15905 is_variant_part
= false;
15909 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15911 struct field_info fi
;
15912 std::vector
<struct symbol
*> template_args
;
15914 child_die
= die
->child
;
15916 while (child_die
&& child_die
->tag
)
15918 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15920 if (is_variant_part
&& discr_offset
== child_die
->sect_off
)
15921 fi
.fields
.back ().variant
.is_discriminant
= true;
15923 child_die
= sibling_die (child_die
);
15926 /* Attach template arguments to type. */
15927 if (!template_args
.empty ())
15929 has_template_parameters
= true;
15930 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15931 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15932 TYPE_TEMPLATE_ARGUMENTS (type
)
15933 = XOBNEWVEC (&objfile
->objfile_obstack
,
15935 TYPE_N_TEMPLATE_ARGUMENTS (type
));
15936 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
15937 template_args
.data (),
15938 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
15939 * sizeof (struct symbol
*)));
15942 /* Attach fields and member functions to the type. */
15944 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
15945 if (!fi
.fnfieldlists
.empty ())
15947 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
15949 /* Get the type which refers to the base class (possibly this
15950 class itself) which contains the vtable pointer for the current
15951 class from the DW_AT_containing_type attribute. This use of
15952 DW_AT_containing_type is a GNU extension. */
15954 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15956 struct type
*t
= die_containing_type (die
, cu
);
15958 set_type_vptr_basetype (type
, t
);
15963 /* Our own class provides vtbl ptr. */
15964 for (i
= TYPE_NFIELDS (t
) - 1;
15965 i
>= TYPE_N_BASECLASSES (t
);
15968 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
15970 if (is_vtable_name (fieldname
, cu
))
15972 set_type_vptr_fieldno (type
, i
);
15977 /* Complain if virtual function table field not found. */
15978 if (i
< TYPE_N_BASECLASSES (t
))
15979 complaint (_("virtual function table pointer "
15980 "not found when defining class '%s'"),
15981 TYPE_NAME (type
) ? TYPE_NAME (type
) : "");
15985 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
15988 else if (cu
->producer
15989 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
15991 /* The IBM XLC compiler does not provide direct indication
15992 of the containing type, but the vtable pointer is
15993 always named __vfp. */
15997 for (i
= TYPE_NFIELDS (type
) - 1;
15998 i
>= TYPE_N_BASECLASSES (type
);
16001 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
16003 set_type_vptr_fieldno (type
, i
);
16004 set_type_vptr_basetype (type
, type
);
16011 /* Copy fi.typedef_field_list linked list elements content into the
16012 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
16013 if (!fi
.typedef_field_list
.empty ())
16015 int count
= fi
.typedef_field_list
.size ();
16017 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16018 TYPE_TYPEDEF_FIELD_ARRAY (type
)
16019 = ((struct decl_field
*)
16021 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
16022 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
16024 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
16025 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
16028 /* Copy fi.nested_types_list linked list elements content into the
16029 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
16030 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
16032 int count
= fi
.nested_types_list
.size ();
16034 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16035 TYPE_NESTED_TYPES_ARRAY (type
)
16036 = ((struct decl_field
*)
16037 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
16038 TYPE_NESTED_TYPES_COUNT (type
) = count
;
16040 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
16041 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
16045 quirk_gcc_member_function_pointer (type
, objfile
);
16046 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
16047 cu
->rust_unions
.push_back (type
);
16049 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
16050 snapshots) has been known to create a die giving a declaration
16051 for a class that has, as a child, a die giving a definition for a
16052 nested class. So we have to process our children even if the
16053 current die is a declaration. Normally, of course, a declaration
16054 won't have any children at all. */
16056 child_die
= die
->child
;
16058 while (child_die
!= NULL
&& child_die
->tag
)
16060 if (child_die
->tag
== DW_TAG_member
16061 || child_die
->tag
== DW_TAG_variable
16062 || child_die
->tag
== DW_TAG_inheritance
16063 || child_die
->tag
== DW_TAG_template_value_param
16064 || child_die
->tag
== DW_TAG_template_type_param
)
16069 process_die (child_die
, cu
);
16071 child_die
= sibling_die (child_die
);
16074 /* Do not consider external references. According to the DWARF standard,
16075 these DIEs are identified by the fact that they have no byte_size
16076 attribute, and a declaration attribute. */
16077 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
16078 || !die_is_declaration (die
, cu
))
16080 struct symbol
*sym
= new_symbol (die
, type
, cu
);
16082 if (has_template_parameters
)
16084 /* Make sure that the symtab is set on the new symbols.
16085 Even though they don't appear in this symtab directly,
16086 other parts of gdb assume that symbols do, and this is
16087 reasonably true. */
16088 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
16089 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
),
16090 symbol_symtab (sym
));
16095 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
16096 update TYPE using some information only available in DIE's children. */
16099 update_enumeration_type_from_children (struct die_info
*die
,
16101 struct dwarf2_cu
*cu
)
16103 struct die_info
*child_die
;
16104 int unsigned_enum
= 1;
16108 auto_obstack obstack
;
16110 for (child_die
= die
->child
;
16111 child_die
!= NULL
&& child_die
->tag
;
16112 child_die
= sibling_die (child_die
))
16114 struct attribute
*attr
;
16116 const gdb_byte
*bytes
;
16117 struct dwarf2_locexpr_baton
*baton
;
16120 if (child_die
->tag
!= DW_TAG_enumerator
)
16123 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
16127 name
= dwarf2_name (child_die
, cu
);
16129 name
= "<anonymous enumerator>";
16131 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
16132 &value
, &bytes
, &baton
);
16138 else if ((mask
& value
) != 0)
16143 /* If we already know that the enum type is neither unsigned, nor
16144 a flag type, no need to look at the rest of the enumerates. */
16145 if (!unsigned_enum
&& !flag_enum
)
16150 TYPE_UNSIGNED (type
) = 1;
16152 TYPE_FLAG_ENUM (type
) = 1;
16155 /* Given a DW_AT_enumeration_type die, set its type. We do not
16156 complete the type's fields yet, or create any symbols. */
16158 static struct type
*
16159 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16161 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16163 struct attribute
*attr
;
16166 /* If the definition of this type lives in .debug_types, read that type.
16167 Don't follow DW_AT_specification though, that will take us back up
16168 the chain and we want to go down. */
16169 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
16172 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16174 /* The type's CU may not be the same as CU.
16175 Ensure TYPE is recorded with CU in die_type_hash. */
16176 return set_die_type (die
, type
, cu
);
16179 type
= alloc_type (objfile
);
16181 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
16182 name
= dwarf2_full_name (NULL
, die
, cu
);
16184 TYPE_NAME (type
) = name
;
16186 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16189 struct type
*underlying_type
= die_type (die
, cu
);
16191 TYPE_TARGET_TYPE (type
) = underlying_type
;
16194 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16197 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16201 TYPE_LENGTH (type
) = 0;
16204 maybe_set_alignment (cu
, die
, type
);
16206 /* The enumeration DIE can be incomplete. In Ada, any type can be
16207 declared as private in the package spec, and then defined only
16208 inside the package body. Such types are known as Taft Amendment
16209 Types. When another package uses such a type, an incomplete DIE
16210 may be generated by the compiler. */
16211 if (die_is_declaration (die
, cu
))
16212 TYPE_STUB (type
) = 1;
16214 /* Finish the creation of this type by using the enum's children.
16215 We must call this even when the underlying type has been provided
16216 so that we can determine if we're looking at a "flag" enum. */
16217 update_enumeration_type_from_children (die
, type
, cu
);
16219 /* If this type has an underlying type that is not a stub, then we
16220 may use its attributes. We always use the "unsigned" attribute
16221 in this situation, because ordinarily we guess whether the type
16222 is unsigned -- but the guess can be wrong and the underlying type
16223 can tell us the reality. However, we defer to a local size
16224 attribute if one exists, because this lets the compiler override
16225 the underlying type if needed. */
16226 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16228 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
16229 if (TYPE_LENGTH (type
) == 0)
16230 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
16231 if (TYPE_RAW_ALIGN (type
) == 0
16232 && TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)) != 0)
16233 set_type_align (type
, TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)));
16236 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16238 return set_die_type (die
, type
, cu
);
16241 /* Given a pointer to a die which begins an enumeration, process all
16242 the dies that define the members of the enumeration, and create the
16243 symbol for the enumeration type.
16245 NOTE: We reverse the order of the element list. */
16248 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16250 struct type
*this_type
;
16252 this_type
= get_die_type (die
, cu
);
16253 if (this_type
== NULL
)
16254 this_type
= read_enumeration_type (die
, cu
);
16256 if (die
->child
!= NULL
)
16258 struct die_info
*child_die
;
16259 struct symbol
*sym
;
16260 struct field
*fields
= NULL
;
16261 int num_fields
= 0;
16264 child_die
= die
->child
;
16265 while (child_die
&& child_die
->tag
)
16267 if (child_die
->tag
!= DW_TAG_enumerator
)
16269 process_die (child_die
, cu
);
16273 name
= dwarf2_name (child_die
, cu
);
16276 sym
= new_symbol (child_die
, this_type
, cu
);
16278 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
16280 fields
= (struct field
*)
16282 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
16283 * sizeof (struct field
));
16286 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
16287 FIELD_TYPE (fields
[num_fields
]) = NULL
;
16288 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
16289 FIELD_BITSIZE (fields
[num_fields
]) = 0;
16295 child_die
= sibling_die (child_die
);
16300 TYPE_NFIELDS (this_type
) = num_fields
;
16301 TYPE_FIELDS (this_type
) = (struct field
*)
16302 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
16303 memcpy (TYPE_FIELDS (this_type
), fields
,
16304 sizeof (struct field
) * num_fields
);
16309 /* If we are reading an enum from a .debug_types unit, and the enum
16310 is a declaration, and the enum is not the signatured type in the
16311 unit, then we do not want to add a symbol for it. Adding a
16312 symbol would in some cases obscure the true definition of the
16313 enum, giving users an incomplete type when the definition is
16314 actually available. Note that we do not want to do this for all
16315 enums which are just declarations, because C++0x allows forward
16316 enum declarations. */
16317 if (cu
->per_cu
->is_debug_types
16318 && die_is_declaration (die
, cu
))
16320 struct signatured_type
*sig_type
;
16322 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16323 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16324 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16328 new_symbol (die
, this_type
, cu
);
16331 /* Extract all information from a DW_TAG_array_type DIE and put it in
16332 the DIE's type field. For now, this only handles one dimensional
16335 static struct type
*
16336 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16338 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16339 struct die_info
*child_die
;
16341 struct type
*element_type
, *range_type
, *index_type
;
16342 struct attribute
*attr
;
16344 struct dynamic_prop
*byte_stride_prop
= NULL
;
16345 unsigned int bit_stride
= 0;
16347 element_type
= die_type (die
, cu
);
16349 /* The die_type call above may have already set the type for this DIE. */
16350 type
= get_die_type (die
, cu
);
16354 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16360 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16361 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
);
16364 complaint (_("unable to read array DW_AT_byte_stride "
16365 " - DIE at %s [in module %s]"),
16366 sect_offset_str (die
->sect_off
),
16367 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16368 /* Ignore this attribute. We will likely not be able to print
16369 arrays of this type correctly, but there is little we can do
16370 to help if we cannot read the attribute's value. */
16371 byte_stride_prop
= NULL
;
16375 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16377 bit_stride
= DW_UNSND (attr
);
16379 /* Irix 6.2 native cc creates array types without children for
16380 arrays with unspecified length. */
16381 if (die
->child
== NULL
)
16383 index_type
= objfile_type (objfile
)->builtin_int
;
16384 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16385 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16386 byte_stride_prop
, bit_stride
);
16387 return set_die_type (die
, type
, cu
);
16390 std::vector
<struct type
*> range_types
;
16391 child_die
= die
->child
;
16392 while (child_die
&& child_die
->tag
)
16394 if (child_die
->tag
== DW_TAG_subrange_type
)
16396 struct type
*child_type
= read_type_die (child_die
, cu
);
16398 if (child_type
!= NULL
)
16400 /* The range type was succesfully read. Save it for the
16401 array type creation. */
16402 range_types
.push_back (child_type
);
16405 child_die
= sibling_die (child_die
);
16408 /* Dwarf2 dimensions are output from left to right, create the
16409 necessary array types in backwards order. */
16411 type
= element_type
;
16413 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16417 while (i
< range_types
.size ())
16418 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16419 byte_stride_prop
, bit_stride
);
16423 size_t ndim
= range_types
.size ();
16425 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16426 byte_stride_prop
, bit_stride
);
16429 /* Understand Dwarf2 support for vector types (like they occur on
16430 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16431 array type. This is not part of the Dwarf2/3 standard yet, but a
16432 custom vendor extension. The main difference between a regular
16433 array and the vector variant is that vectors are passed by value
16435 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16437 make_vector_type (type
);
16439 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16440 implementation may choose to implement triple vectors using this
16442 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16445 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16446 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16448 complaint (_("DW_AT_byte_size for array type smaller "
16449 "than the total size of elements"));
16452 name
= dwarf2_name (die
, cu
);
16454 TYPE_NAME (type
) = name
;
16456 maybe_set_alignment (cu
, die
, type
);
16458 /* Install the type in the die. */
16459 set_die_type (die
, type
, cu
);
16461 /* set_die_type should be already done. */
16462 set_descriptive_type (type
, die
, cu
);
16467 static enum dwarf_array_dim_ordering
16468 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16470 struct attribute
*attr
;
16472 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16475 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16477 /* GNU F77 is a special case, as at 08/2004 array type info is the
16478 opposite order to the dwarf2 specification, but data is still
16479 laid out as per normal fortran.
16481 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16482 version checking. */
16484 if (cu
->language
== language_fortran
16485 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16487 return DW_ORD_row_major
;
16490 switch (cu
->language_defn
->la_array_ordering
)
16492 case array_column_major
:
16493 return DW_ORD_col_major
;
16494 case array_row_major
:
16496 return DW_ORD_row_major
;
16500 /* Extract all information from a DW_TAG_set_type DIE and put it in
16501 the DIE's type field. */
16503 static struct type
*
16504 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16506 struct type
*domain_type
, *set_type
;
16507 struct attribute
*attr
;
16509 domain_type
= die_type (die
, cu
);
16511 /* The die_type call above may have already set the type for this DIE. */
16512 set_type
= get_die_type (die
, cu
);
16516 set_type
= create_set_type (NULL
, domain_type
);
16518 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16520 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16522 maybe_set_alignment (cu
, die
, set_type
);
16524 return set_die_type (die
, set_type
, cu
);
16527 /* A helper for read_common_block that creates a locexpr baton.
16528 SYM is the symbol which we are marking as computed.
16529 COMMON_DIE is the DIE for the common block.
16530 COMMON_LOC is the location expression attribute for the common
16532 MEMBER_LOC is the location expression attribute for the particular
16533 member of the common block that we are processing.
16534 CU is the CU from which the above come. */
16537 mark_common_block_symbol_computed (struct symbol
*sym
,
16538 struct die_info
*common_die
,
16539 struct attribute
*common_loc
,
16540 struct attribute
*member_loc
,
16541 struct dwarf2_cu
*cu
)
16543 struct dwarf2_per_objfile
*dwarf2_per_objfile
16544 = cu
->per_cu
->dwarf2_per_objfile
;
16545 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16546 struct dwarf2_locexpr_baton
*baton
;
16548 unsigned int cu_off
;
16549 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
16550 LONGEST offset
= 0;
16552 gdb_assert (common_loc
&& member_loc
);
16553 gdb_assert (attr_form_is_block (common_loc
));
16554 gdb_assert (attr_form_is_block (member_loc
)
16555 || attr_form_is_constant (member_loc
));
16557 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16558 baton
->per_cu
= cu
->per_cu
;
16559 gdb_assert (baton
->per_cu
);
16561 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16563 if (attr_form_is_constant (member_loc
))
16565 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
16566 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16569 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16571 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16574 *ptr
++ = DW_OP_call4
;
16575 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16576 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16579 if (attr_form_is_constant (member_loc
))
16581 *ptr
++ = DW_OP_addr
;
16582 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16583 ptr
+= cu
->header
.addr_size
;
16587 /* We have to copy the data here, because DW_OP_call4 will only
16588 use a DW_AT_location attribute. */
16589 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16590 ptr
+= DW_BLOCK (member_loc
)->size
;
16593 *ptr
++ = DW_OP_plus
;
16594 gdb_assert (ptr
- baton
->data
== baton
->size
);
16596 SYMBOL_LOCATION_BATON (sym
) = baton
;
16597 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16600 /* Create appropriate locally-scoped variables for all the
16601 DW_TAG_common_block entries. Also create a struct common_block
16602 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16603 is used to sepate the common blocks name namespace from regular
16607 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16609 struct attribute
*attr
;
16611 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16614 /* Support the .debug_loc offsets. */
16615 if (attr_form_is_block (attr
))
16619 else if (attr_form_is_section_offset (attr
))
16621 dwarf2_complex_location_expr_complaint ();
16626 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16627 "common block member");
16632 if (die
->child
!= NULL
)
16634 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16635 struct die_info
*child_die
;
16636 size_t n_entries
= 0, size
;
16637 struct common_block
*common_block
;
16638 struct symbol
*sym
;
16640 for (child_die
= die
->child
;
16641 child_die
&& child_die
->tag
;
16642 child_die
= sibling_die (child_die
))
16645 size
= (sizeof (struct common_block
)
16646 + (n_entries
- 1) * sizeof (struct symbol
*));
16648 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16650 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16651 common_block
->n_entries
= 0;
16653 for (child_die
= die
->child
;
16654 child_die
&& child_die
->tag
;
16655 child_die
= sibling_die (child_die
))
16657 /* Create the symbol in the DW_TAG_common_block block in the current
16659 sym
= new_symbol (child_die
, NULL
, cu
);
16662 struct attribute
*member_loc
;
16664 common_block
->contents
[common_block
->n_entries
++] = sym
;
16666 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16670 /* GDB has handled this for a long time, but it is
16671 not specified by DWARF. It seems to have been
16672 emitted by gfortran at least as recently as:
16673 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16674 complaint (_("Variable in common block has "
16675 "DW_AT_data_member_location "
16676 "- DIE at %s [in module %s]"),
16677 sect_offset_str (child_die
->sect_off
),
16678 objfile_name (objfile
));
16680 if (attr_form_is_section_offset (member_loc
))
16681 dwarf2_complex_location_expr_complaint ();
16682 else if (attr_form_is_constant (member_loc
)
16683 || attr_form_is_block (member_loc
))
16686 mark_common_block_symbol_computed (sym
, die
, attr
,
16690 dwarf2_complex_location_expr_complaint ();
16695 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16696 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16700 /* Create a type for a C++ namespace. */
16702 static struct type
*
16703 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16705 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16706 const char *previous_prefix
, *name
;
16710 /* For extensions, reuse the type of the original namespace. */
16711 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16713 struct die_info
*ext_die
;
16714 struct dwarf2_cu
*ext_cu
= cu
;
16716 ext_die
= dwarf2_extension (die
, &ext_cu
);
16717 type
= read_type_die (ext_die
, ext_cu
);
16719 /* EXT_CU may not be the same as CU.
16720 Ensure TYPE is recorded with CU in die_type_hash. */
16721 return set_die_type (die
, type
, cu
);
16724 name
= namespace_name (die
, &is_anonymous
, cu
);
16726 /* Now build the name of the current namespace. */
16728 previous_prefix
= determine_prefix (die
, cu
);
16729 if (previous_prefix
[0] != '\0')
16730 name
= typename_concat (&objfile
->objfile_obstack
,
16731 previous_prefix
, name
, 0, cu
);
16733 /* Create the type. */
16734 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16736 return set_die_type (die
, type
, cu
);
16739 /* Read a namespace scope. */
16742 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16744 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16747 /* Add a symbol associated to this if we haven't seen the namespace
16748 before. Also, add a using directive if it's an anonymous
16751 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16755 type
= read_type_die (die
, cu
);
16756 new_symbol (die
, type
, cu
);
16758 namespace_name (die
, &is_anonymous
, cu
);
16761 const char *previous_prefix
= determine_prefix (die
, cu
);
16763 std::vector
<const char *> excludes
;
16764 add_using_directive (using_directives (cu
),
16765 previous_prefix
, TYPE_NAME (type
), NULL
,
16766 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16770 if (die
->child
!= NULL
)
16772 struct die_info
*child_die
= die
->child
;
16774 while (child_die
&& child_die
->tag
)
16776 process_die (child_die
, cu
);
16777 child_die
= sibling_die (child_die
);
16782 /* Read a Fortran module as type. This DIE can be only a declaration used for
16783 imported module. Still we need that type as local Fortran "use ... only"
16784 declaration imports depend on the created type in determine_prefix. */
16786 static struct type
*
16787 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16789 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16790 const char *module_name
;
16793 module_name
= dwarf2_name (die
, cu
);
16795 complaint (_("DW_TAG_module has no name, offset %s"),
16796 sect_offset_str (die
->sect_off
));
16797 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16799 return set_die_type (die
, type
, cu
);
16802 /* Read a Fortran module. */
16805 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16807 struct die_info
*child_die
= die
->child
;
16810 type
= read_type_die (die
, cu
);
16811 new_symbol (die
, type
, cu
);
16813 while (child_die
&& child_die
->tag
)
16815 process_die (child_die
, cu
);
16816 child_die
= sibling_die (child_die
);
16820 /* Return the name of the namespace represented by DIE. Set
16821 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16824 static const char *
16825 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16827 struct die_info
*current_die
;
16828 const char *name
= NULL
;
16830 /* Loop through the extensions until we find a name. */
16832 for (current_die
= die
;
16833 current_die
!= NULL
;
16834 current_die
= dwarf2_extension (die
, &cu
))
16836 /* We don't use dwarf2_name here so that we can detect the absence
16837 of a name -> anonymous namespace. */
16838 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16844 /* Is it an anonymous namespace? */
16846 *is_anonymous
= (name
== NULL
);
16848 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16853 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16854 the user defined type vector. */
16856 static struct type
*
16857 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16859 struct gdbarch
*gdbarch
16860 = get_objfile_arch (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16861 struct comp_unit_head
*cu_header
= &cu
->header
;
16863 struct attribute
*attr_byte_size
;
16864 struct attribute
*attr_address_class
;
16865 int byte_size
, addr_class
;
16866 struct type
*target_type
;
16868 target_type
= die_type (die
, cu
);
16870 /* The die_type call above may have already set the type for this DIE. */
16871 type
= get_die_type (die
, cu
);
16875 type
= lookup_pointer_type (target_type
);
16877 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16878 if (attr_byte_size
)
16879 byte_size
= DW_UNSND (attr_byte_size
);
16881 byte_size
= cu_header
->addr_size
;
16883 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16884 if (attr_address_class
)
16885 addr_class
= DW_UNSND (attr_address_class
);
16887 addr_class
= DW_ADDR_none
;
16889 ULONGEST alignment
= get_alignment (cu
, die
);
16891 /* If the pointer size, alignment, or address class is different
16892 than the default, create a type variant marked as such and set
16893 the length accordingly. */
16894 if (TYPE_LENGTH (type
) != byte_size
16895 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
16896 && alignment
!= TYPE_RAW_ALIGN (type
))
16897 || addr_class
!= DW_ADDR_none
)
16899 if (gdbarch_address_class_type_flags_p (gdbarch
))
16903 type_flags
= gdbarch_address_class_type_flags
16904 (gdbarch
, byte_size
, addr_class
);
16905 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16907 type
= make_type_with_address_space (type
, type_flags
);
16909 else if (TYPE_LENGTH (type
) != byte_size
)
16911 complaint (_("invalid pointer size %d"), byte_size
);
16913 else if (TYPE_RAW_ALIGN (type
) != alignment
)
16915 complaint (_("Invalid DW_AT_alignment"
16916 " - DIE at %s [in module %s]"),
16917 sect_offset_str (die
->sect_off
),
16918 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16922 /* Should we also complain about unhandled address classes? */
16926 TYPE_LENGTH (type
) = byte_size
;
16927 set_type_align (type
, alignment
);
16928 return set_die_type (die
, type
, cu
);
16931 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16932 the user defined type vector. */
16934 static struct type
*
16935 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16938 struct type
*to_type
;
16939 struct type
*domain
;
16941 to_type
= die_type (die
, cu
);
16942 domain
= die_containing_type (die
, cu
);
16944 /* The calls above may have already set the type for this DIE. */
16945 type
= get_die_type (die
, cu
);
16949 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
16950 type
= lookup_methodptr_type (to_type
);
16951 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
16953 struct type
*new_type
16954 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16956 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
16957 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
16958 TYPE_VARARGS (to_type
));
16959 type
= lookup_methodptr_type (new_type
);
16962 type
= lookup_memberptr_type (to_type
, domain
);
16964 return set_die_type (die
, type
, cu
);
16967 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
16968 the user defined type vector. */
16970 static struct type
*
16971 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16972 enum type_code refcode
)
16974 struct comp_unit_head
*cu_header
= &cu
->header
;
16975 struct type
*type
, *target_type
;
16976 struct attribute
*attr
;
16978 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
16980 target_type
= die_type (die
, cu
);
16982 /* The die_type call above may have already set the type for this DIE. */
16983 type
= get_die_type (die
, cu
);
16987 type
= lookup_reference_type (target_type
, refcode
);
16988 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16991 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16995 TYPE_LENGTH (type
) = cu_header
->addr_size
;
16997 maybe_set_alignment (cu
, die
, type
);
16998 return set_die_type (die
, type
, cu
);
17001 /* Add the given cv-qualifiers to the element type of the array. GCC
17002 outputs DWARF type qualifiers that apply to an array, not the
17003 element type. But GDB relies on the array element type to carry
17004 the cv-qualifiers. This mimics section 6.7.3 of the C99
17007 static struct type
*
17008 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17009 struct type
*base_type
, int cnst
, int voltl
)
17011 struct type
*el_type
, *inner_array
;
17013 base_type
= copy_type (base_type
);
17014 inner_array
= base_type
;
17016 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
17018 TYPE_TARGET_TYPE (inner_array
) =
17019 copy_type (TYPE_TARGET_TYPE (inner_array
));
17020 inner_array
= TYPE_TARGET_TYPE (inner_array
);
17023 el_type
= TYPE_TARGET_TYPE (inner_array
);
17024 cnst
|= TYPE_CONST (el_type
);
17025 voltl
|= TYPE_VOLATILE (el_type
);
17026 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
17028 return set_die_type (die
, base_type
, cu
);
17031 static struct type
*
17032 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17034 struct type
*base_type
, *cv_type
;
17036 base_type
= die_type (die
, cu
);
17038 /* The die_type call above may have already set the type for this DIE. */
17039 cv_type
= get_die_type (die
, cu
);
17043 /* In case the const qualifier is applied to an array type, the element type
17044 is so qualified, not the array type (section 6.7.3 of C99). */
17045 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17046 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
17048 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
17049 return set_die_type (die
, cv_type
, cu
);
17052 static struct type
*
17053 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17055 struct type
*base_type
, *cv_type
;
17057 base_type
= die_type (die
, cu
);
17059 /* The die_type call above may have already set the type for this DIE. */
17060 cv_type
= get_die_type (die
, cu
);
17064 /* In case the volatile qualifier is applied to an array type, the
17065 element type is so qualified, not the array type (section 6.7.3
17067 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17068 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
17070 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
17071 return set_die_type (die
, cv_type
, cu
);
17074 /* Handle DW_TAG_restrict_type. */
17076 static struct type
*
17077 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17079 struct type
*base_type
, *cv_type
;
17081 base_type
= die_type (die
, cu
);
17083 /* The die_type call above may have already set the type for this DIE. */
17084 cv_type
= get_die_type (die
, cu
);
17088 cv_type
= make_restrict_type (base_type
);
17089 return set_die_type (die
, cv_type
, cu
);
17092 /* Handle DW_TAG_atomic_type. */
17094 static struct type
*
17095 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17097 struct type
*base_type
, *cv_type
;
17099 base_type
= die_type (die
, cu
);
17101 /* The die_type call above may have already set the type for this DIE. */
17102 cv_type
= get_die_type (die
, cu
);
17106 cv_type
= make_atomic_type (base_type
);
17107 return set_die_type (die
, cv_type
, cu
);
17110 /* Extract all information from a DW_TAG_string_type DIE and add to
17111 the user defined type vector. It isn't really a user defined type,
17112 but it behaves like one, with other DIE's using an AT_user_def_type
17113 attribute to reference it. */
17115 static struct type
*
17116 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17118 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17119 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17120 struct type
*type
, *range_type
, *index_type
, *char_type
;
17121 struct attribute
*attr
;
17122 unsigned int length
;
17124 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
17127 length
= DW_UNSND (attr
);
17131 /* Check for the DW_AT_byte_size attribute. */
17132 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17135 length
= DW_UNSND (attr
);
17143 index_type
= objfile_type (objfile
)->builtin_int
;
17144 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17145 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
17146 type
= create_string_type (NULL
, char_type
, range_type
);
17148 return set_die_type (die
, type
, cu
);
17151 /* Assuming that DIE corresponds to a function, returns nonzero
17152 if the function is prototyped. */
17155 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
17157 struct attribute
*attr
;
17159 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
17160 if (attr
&& (DW_UNSND (attr
) != 0))
17163 /* The DWARF standard implies that the DW_AT_prototyped attribute
17164 is only meaninful for C, but the concept also extends to other
17165 languages that allow unprototyped functions (Eg: Objective C).
17166 For all other languages, assume that functions are always
17168 if (cu
->language
!= language_c
17169 && cu
->language
!= language_objc
17170 && cu
->language
!= language_opencl
)
17173 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17174 prototyped and unprototyped functions; default to prototyped,
17175 since that is more common in modern code (and RealView warns
17176 about unprototyped functions). */
17177 if (producer_is_realview (cu
->producer
))
17183 /* Handle DIES due to C code like:
17187 int (*funcp)(int a, long l);
17191 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17193 static struct type
*
17194 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17196 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17197 struct type
*type
; /* Type that this function returns. */
17198 struct type
*ftype
; /* Function that returns above type. */
17199 struct attribute
*attr
;
17201 type
= die_type (die
, cu
);
17203 /* The die_type call above may have already set the type for this DIE. */
17204 ftype
= get_die_type (die
, cu
);
17208 ftype
= lookup_function_type (type
);
17210 if (prototyped_function_p (die
, cu
))
17211 TYPE_PROTOTYPED (ftype
) = 1;
17213 /* Store the calling convention in the type if it's available in
17214 the subroutine die. Otherwise set the calling convention to
17215 the default value DW_CC_normal. */
17216 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17218 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
17219 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17220 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17222 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17224 /* Record whether the function returns normally to its caller or not
17225 if the DWARF producer set that information. */
17226 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17227 if (attr
&& (DW_UNSND (attr
) != 0))
17228 TYPE_NO_RETURN (ftype
) = 1;
17230 /* We need to add the subroutine type to the die immediately so
17231 we don't infinitely recurse when dealing with parameters
17232 declared as the same subroutine type. */
17233 set_die_type (die
, ftype
, cu
);
17235 if (die
->child
!= NULL
)
17237 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17238 struct die_info
*child_die
;
17239 int nparams
, iparams
;
17241 /* Count the number of parameters.
17242 FIXME: GDB currently ignores vararg functions, but knows about
17243 vararg member functions. */
17245 child_die
= die
->child
;
17246 while (child_die
&& child_die
->tag
)
17248 if (child_die
->tag
== DW_TAG_formal_parameter
)
17250 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17251 TYPE_VARARGS (ftype
) = 1;
17252 child_die
= sibling_die (child_die
);
17255 /* Allocate storage for parameters and fill them in. */
17256 TYPE_NFIELDS (ftype
) = nparams
;
17257 TYPE_FIELDS (ftype
) = (struct field
*)
17258 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
17260 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17261 even if we error out during the parameters reading below. */
17262 for (iparams
= 0; iparams
< nparams
; iparams
++)
17263 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17266 child_die
= die
->child
;
17267 while (child_die
&& child_die
->tag
)
17269 if (child_die
->tag
== DW_TAG_formal_parameter
)
17271 struct type
*arg_type
;
17273 /* DWARF version 2 has no clean way to discern C++
17274 static and non-static member functions. G++ helps
17275 GDB by marking the first parameter for non-static
17276 member functions (which is the this pointer) as
17277 artificial. We pass this information to
17278 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17280 DWARF version 3 added DW_AT_object_pointer, which GCC
17281 4.5 does not yet generate. */
17282 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17284 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17286 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17287 arg_type
= die_type (child_die
, cu
);
17289 /* RealView does not mark THIS as const, which the testsuite
17290 expects. GCC marks THIS as const in method definitions,
17291 but not in the class specifications (GCC PR 43053). */
17292 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17293 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17296 struct dwarf2_cu
*arg_cu
= cu
;
17297 const char *name
= dwarf2_name (child_die
, cu
);
17299 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17302 /* If the compiler emits this, use it. */
17303 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17306 else if (name
&& strcmp (name
, "this") == 0)
17307 /* Function definitions will have the argument names. */
17309 else if (name
== NULL
&& iparams
== 0)
17310 /* Declarations may not have the names, so like
17311 elsewhere in GDB, assume an artificial first
17312 argument is "this". */
17316 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17320 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17323 child_die
= sibling_die (child_die
);
17330 static struct type
*
17331 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17333 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17334 const char *name
= NULL
;
17335 struct type
*this_type
, *target_type
;
17337 name
= dwarf2_full_name (NULL
, die
, cu
);
17338 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17339 TYPE_TARGET_STUB (this_type
) = 1;
17340 set_die_type (die
, this_type
, cu
);
17341 target_type
= die_type (die
, cu
);
17342 if (target_type
!= this_type
)
17343 TYPE_TARGET_TYPE (this_type
) = target_type
;
17346 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17347 spec and cause infinite loops in GDB. */
17348 complaint (_("Self-referential DW_TAG_typedef "
17349 "- DIE at %s [in module %s]"),
17350 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17351 TYPE_TARGET_TYPE (this_type
) = NULL
;
17356 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17357 (which may be different from NAME) to the architecture back-end to allow
17358 it to guess the correct format if necessary. */
17360 static struct type
*
17361 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17362 const char *name_hint
)
17364 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17365 const struct floatformat
**format
;
17368 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17370 type
= init_float_type (objfile
, bits
, name
, format
);
17372 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17377 /* Find a representation of a given base type and install
17378 it in the TYPE field of the die. */
17380 static struct type
*
17381 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17383 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17385 struct attribute
*attr
;
17386 int encoding
= 0, bits
= 0;
17389 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17392 encoding
= DW_UNSND (attr
);
17394 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17397 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17399 name
= dwarf2_name (die
, cu
);
17402 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
17407 case DW_ATE_address
:
17408 /* Turn DW_ATE_address into a void * pointer. */
17409 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17410 type
= init_pointer_type (objfile
, bits
, name
, type
);
17412 case DW_ATE_boolean
:
17413 type
= init_boolean_type (objfile
, bits
, 1, name
);
17415 case DW_ATE_complex_float
:
17416 type
= dwarf2_init_float_type (objfile
, bits
/ 2, NULL
, name
);
17417 type
= init_complex_type (objfile
, name
, type
);
17419 case DW_ATE_decimal_float
:
17420 type
= init_decfloat_type (objfile
, bits
, name
);
17423 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
17425 case DW_ATE_signed
:
17426 type
= init_integer_type (objfile
, bits
, 0, name
);
17428 case DW_ATE_unsigned
:
17429 if (cu
->language
== language_fortran
17431 && startswith (name
, "character("))
17432 type
= init_character_type (objfile
, bits
, 1, name
);
17434 type
= init_integer_type (objfile
, bits
, 1, name
);
17436 case DW_ATE_signed_char
:
17437 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17438 || cu
->language
== language_pascal
17439 || cu
->language
== language_fortran
)
17440 type
= init_character_type (objfile
, bits
, 0, name
);
17442 type
= init_integer_type (objfile
, bits
, 0, name
);
17444 case DW_ATE_unsigned_char
:
17445 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17446 || cu
->language
== language_pascal
17447 || cu
->language
== language_fortran
17448 || cu
->language
== language_rust
)
17449 type
= init_character_type (objfile
, bits
, 1, name
);
17451 type
= init_integer_type (objfile
, bits
, 1, name
);
17455 gdbarch
*arch
= get_objfile_arch (objfile
);
17458 type
= builtin_type (arch
)->builtin_char16
;
17459 else if (bits
== 32)
17460 type
= builtin_type (arch
)->builtin_char32
;
17463 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
17465 type
= init_integer_type (objfile
, bits
, 1, name
);
17467 return set_die_type (die
, type
, cu
);
17472 complaint (_("unsupported DW_AT_encoding: '%s'"),
17473 dwarf_type_encoding_name (encoding
));
17474 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17478 if (name
&& strcmp (name
, "char") == 0)
17479 TYPE_NOSIGN (type
) = 1;
17481 maybe_set_alignment (cu
, die
, type
);
17483 return set_die_type (die
, type
, cu
);
17486 /* Parse dwarf attribute if it's a block, reference or constant and put the
17487 resulting value of the attribute into struct bound_prop.
17488 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17491 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17492 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
17494 struct dwarf2_property_baton
*baton
;
17495 struct obstack
*obstack
17496 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17498 if (attr
== NULL
|| prop
== NULL
)
17501 if (attr_form_is_block (attr
))
17503 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17504 baton
->referenced_type
= NULL
;
17505 baton
->locexpr
.per_cu
= cu
->per_cu
;
17506 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17507 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17508 prop
->data
.baton
= baton
;
17509 prop
->kind
= PROP_LOCEXPR
;
17510 gdb_assert (prop
->data
.baton
!= NULL
);
17512 else if (attr_form_is_ref (attr
))
17514 struct dwarf2_cu
*target_cu
= cu
;
17515 struct die_info
*target_die
;
17516 struct attribute
*target_attr
;
17518 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17519 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17520 if (target_attr
== NULL
)
17521 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17523 if (target_attr
== NULL
)
17526 switch (target_attr
->name
)
17528 case DW_AT_location
:
17529 if (attr_form_is_section_offset (target_attr
))
17531 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17532 baton
->referenced_type
= die_type (target_die
, target_cu
);
17533 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17534 prop
->data
.baton
= baton
;
17535 prop
->kind
= PROP_LOCLIST
;
17536 gdb_assert (prop
->data
.baton
!= NULL
);
17538 else if (attr_form_is_block (target_attr
))
17540 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17541 baton
->referenced_type
= die_type (target_die
, target_cu
);
17542 baton
->locexpr
.per_cu
= cu
->per_cu
;
17543 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17544 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17545 prop
->data
.baton
= baton
;
17546 prop
->kind
= PROP_LOCEXPR
;
17547 gdb_assert (prop
->data
.baton
!= NULL
);
17551 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17552 "dynamic property");
17556 case DW_AT_data_member_location
:
17560 if (!handle_data_member_location (target_die
, target_cu
,
17564 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17565 baton
->referenced_type
= read_type_die (target_die
->parent
,
17567 baton
->offset_info
.offset
= offset
;
17568 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17569 prop
->data
.baton
= baton
;
17570 prop
->kind
= PROP_ADDR_OFFSET
;
17575 else if (attr_form_is_constant (attr
))
17577 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
17578 prop
->kind
= PROP_CONST
;
17582 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17583 dwarf2_name (die
, cu
));
17590 /* Read the given DW_AT_subrange DIE. */
17592 static struct type
*
17593 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17595 struct type
*base_type
, *orig_base_type
;
17596 struct type
*range_type
;
17597 struct attribute
*attr
;
17598 struct dynamic_prop low
, high
;
17599 int low_default_is_valid
;
17600 int high_bound_is_count
= 0;
17602 LONGEST negative_mask
;
17604 orig_base_type
= die_type (die
, cu
);
17605 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17606 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17607 creating the range type, but we use the result of check_typedef
17608 when examining properties of the type. */
17609 base_type
= check_typedef (orig_base_type
);
17611 /* The die_type call above may have already set the type for this DIE. */
17612 range_type
= get_die_type (die
, cu
);
17616 low
.kind
= PROP_CONST
;
17617 high
.kind
= PROP_CONST
;
17618 high
.data
.const_val
= 0;
17620 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17621 omitting DW_AT_lower_bound. */
17622 switch (cu
->language
)
17625 case language_cplus
:
17626 low
.data
.const_val
= 0;
17627 low_default_is_valid
= 1;
17629 case language_fortran
:
17630 low
.data
.const_val
= 1;
17631 low_default_is_valid
= 1;
17634 case language_objc
:
17635 case language_rust
:
17636 low
.data
.const_val
= 0;
17637 low_default_is_valid
= (cu
->header
.version
>= 4);
17641 case language_pascal
:
17642 low
.data
.const_val
= 1;
17643 low_default_is_valid
= (cu
->header
.version
>= 4);
17646 low
.data
.const_val
= 0;
17647 low_default_is_valid
= 0;
17651 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17653 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
17654 else if (!low_default_is_valid
)
17655 complaint (_("Missing DW_AT_lower_bound "
17656 "- DIE at %s [in module %s]"),
17657 sect_offset_str (die
->sect_off
),
17658 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17660 struct attribute
*attr_ub
, *attr_count
;
17661 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17662 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17664 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
17665 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17667 /* If bounds are constant do the final calculation here. */
17668 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17669 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17671 high_bound_is_count
= 1;
17675 if (attr_ub
!= NULL
)
17676 complaint (_("Unresolved DW_AT_upper_bound "
17677 "- DIE at %s [in module %s]"),
17678 sect_offset_str (die
->sect_off
),
17679 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17680 if (attr_count
!= NULL
)
17681 complaint (_("Unresolved DW_AT_count "
17682 "- DIE at %s [in module %s]"),
17683 sect_offset_str (die
->sect_off
),
17684 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17689 /* Dwarf-2 specifications explicitly allows to create subrange types
17690 without specifying a base type.
17691 In that case, the base type must be set to the type of
17692 the lower bound, upper bound or count, in that order, if any of these
17693 three attributes references an object that has a type.
17694 If no base type is found, the Dwarf-2 specifications say that
17695 a signed integer type of size equal to the size of an address should
17697 For the following C code: `extern char gdb_int [];'
17698 GCC produces an empty range DIE.
17699 FIXME: muller/2010-05-28: Possible references to object for low bound,
17700 high bound or count are not yet handled by this code. */
17701 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
17703 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17704 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17705 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
17706 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
17708 /* Test "int", "long int", and "long long int" objfile types,
17709 and select the first one having a size above or equal to the
17710 architecture address size. */
17711 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17712 base_type
= int_type
;
17715 int_type
= objfile_type (objfile
)->builtin_long
;
17716 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17717 base_type
= int_type
;
17720 int_type
= objfile_type (objfile
)->builtin_long_long
;
17721 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17722 base_type
= int_type
;
17727 /* Normally, the DWARF producers are expected to use a signed
17728 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17729 But this is unfortunately not always the case, as witnessed
17730 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17731 is used instead. To work around that ambiguity, we treat
17732 the bounds as signed, and thus sign-extend their values, when
17733 the base type is signed. */
17735 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17736 if (low
.kind
== PROP_CONST
17737 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17738 low
.data
.const_val
|= negative_mask
;
17739 if (high
.kind
== PROP_CONST
17740 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17741 high
.data
.const_val
|= negative_mask
;
17743 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
17745 if (high_bound_is_count
)
17746 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17748 /* Ada expects an empty array on no boundary attributes. */
17749 if (attr
== NULL
&& cu
->language
!= language_ada
)
17750 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17752 name
= dwarf2_name (die
, cu
);
17754 TYPE_NAME (range_type
) = name
;
17756 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17758 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17760 maybe_set_alignment (cu
, die
, range_type
);
17762 set_die_type (die
, range_type
, cu
);
17764 /* set_die_type should be already done. */
17765 set_descriptive_type (range_type
, die
, cu
);
17770 static struct type
*
17771 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17775 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
17777 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
17779 /* In Ada, an unspecified type is typically used when the description
17780 of the type is defered to a different unit. When encountering
17781 such a type, we treat it as a stub, and try to resolve it later on,
17783 if (cu
->language
== language_ada
)
17784 TYPE_STUB (type
) = 1;
17786 return set_die_type (die
, type
, cu
);
17789 /* Read a single die and all its descendents. Set the die's sibling
17790 field to NULL; set other fields in the die correctly, and set all
17791 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17792 location of the info_ptr after reading all of those dies. PARENT
17793 is the parent of the die in question. */
17795 static struct die_info
*
17796 read_die_and_children (const struct die_reader_specs
*reader
,
17797 const gdb_byte
*info_ptr
,
17798 const gdb_byte
**new_info_ptr
,
17799 struct die_info
*parent
)
17801 struct die_info
*die
;
17802 const gdb_byte
*cur_ptr
;
17805 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
17808 *new_info_ptr
= cur_ptr
;
17811 store_in_ref_table (die
, reader
->cu
);
17814 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17818 *new_info_ptr
= cur_ptr
;
17821 die
->sibling
= NULL
;
17822 die
->parent
= parent
;
17826 /* Read a die, all of its descendents, and all of its siblings; set
17827 all of the fields of all of the dies correctly. Arguments are as
17828 in read_die_and_children. */
17830 static struct die_info
*
17831 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17832 const gdb_byte
*info_ptr
,
17833 const gdb_byte
**new_info_ptr
,
17834 struct die_info
*parent
)
17836 struct die_info
*first_die
, *last_sibling
;
17837 const gdb_byte
*cur_ptr
;
17839 cur_ptr
= info_ptr
;
17840 first_die
= last_sibling
= NULL
;
17844 struct die_info
*die
17845 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17849 *new_info_ptr
= cur_ptr
;
17856 last_sibling
->sibling
= die
;
17858 last_sibling
= die
;
17862 /* Read a die, all of its descendents, and all of its siblings; set
17863 all of the fields of all of the dies correctly. Arguments are as
17864 in read_die_and_children.
17865 This the main entry point for reading a DIE and all its children. */
17867 static struct die_info
*
17868 read_die_and_siblings (const struct die_reader_specs
*reader
,
17869 const gdb_byte
*info_ptr
,
17870 const gdb_byte
**new_info_ptr
,
17871 struct die_info
*parent
)
17873 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17874 new_info_ptr
, parent
);
17876 if (dwarf_die_debug
)
17878 fprintf_unfiltered (gdb_stdlog
,
17879 "Read die from %s@0x%x of %s:\n",
17880 get_section_name (reader
->die_section
),
17881 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17882 bfd_get_filename (reader
->abfd
));
17883 dump_die (die
, dwarf_die_debug
);
17889 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
17891 The caller is responsible for filling in the extra attributes
17892 and updating (*DIEP)->num_attrs.
17893 Set DIEP to point to a newly allocated die with its information,
17894 except for its child, sibling, and parent fields.
17895 Set HAS_CHILDREN to tell whether the die has children or not. */
17897 static const gdb_byte
*
17898 read_full_die_1 (const struct die_reader_specs
*reader
,
17899 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17900 int *has_children
, int num_extra_attrs
)
17902 unsigned int abbrev_number
, bytes_read
, i
;
17903 struct abbrev_info
*abbrev
;
17904 struct die_info
*die
;
17905 struct dwarf2_cu
*cu
= reader
->cu
;
17906 bfd
*abfd
= reader
->abfd
;
17908 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
17909 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17910 info_ptr
+= bytes_read
;
17911 if (!abbrev_number
)
17918 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
17920 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
17922 bfd_get_filename (abfd
));
17924 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
17925 die
->sect_off
= sect_off
;
17926 die
->tag
= abbrev
->tag
;
17927 die
->abbrev
= abbrev_number
;
17929 /* Make the result usable.
17930 The caller needs to update num_attrs after adding the extra
17932 die
->num_attrs
= abbrev
->num_attrs
;
17934 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
17935 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
17939 *has_children
= abbrev
->has_children
;
17943 /* Read a die and all its attributes.
17944 Set DIEP to point to a newly allocated die with its information,
17945 except for its child, sibling, and parent fields.
17946 Set HAS_CHILDREN to tell whether the die has children or not. */
17948 static const gdb_byte
*
17949 read_full_die (const struct die_reader_specs
*reader
,
17950 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17953 const gdb_byte
*result
;
17955 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
17957 if (dwarf_die_debug
)
17959 fprintf_unfiltered (gdb_stdlog
,
17960 "Read die from %s@0x%x of %s:\n",
17961 get_section_name (reader
->die_section
),
17962 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17963 bfd_get_filename (reader
->abfd
));
17964 dump_die (*diep
, dwarf_die_debug
);
17970 /* Abbreviation tables.
17972 In DWARF version 2, the description of the debugging information is
17973 stored in a separate .debug_abbrev section. Before we read any
17974 dies from a section we read in all abbreviations and install them
17975 in a hash table. */
17977 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
17979 struct abbrev_info
*
17980 abbrev_table::alloc_abbrev ()
17982 struct abbrev_info
*abbrev
;
17984 abbrev
= XOBNEW (&abbrev_obstack
, struct abbrev_info
);
17985 memset (abbrev
, 0, sizeof (struct abbrev_info
));
17990 /* Add an abbreviation to the table. */
17993 abbrev_table::add_abbrev (unsigned int abbrev_number
,
17994 struct abbrev_info
*abbrev
)
17996 unsigned int hash_number
;
17998 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
17999 abbrev
->next
= m_abbrevs
[hash_number
];
18000 m_abbrevs
[hash_number
] = abbrev
;
18003 /* Look up an abbrev in the table.
18004 Returns NULL if the abbrev is not found. */
18006 struct abbrev_info
*
18007 abbrev_table::lookup_abbrev (unsigned int abbrev_number
)
18009 unsigned int hash_number
;
18010 struct abbrev_info
*abbrev
;
18012 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18013 abbrev
= m_abbrevs
[hash_number
];
18017 if (abbrev
->number
== abbrev_number
)
18019 abbrev
= abbrev
->next
;
18024 /* Read in an abbrev table. */
18026 static abbrev_table_up
18027 abbrev_table_read_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
18028 struct dwarf2_section_info
*section
,
18029 sect_offset sect_off
)
18031 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18032 bfd
*abfd
= get_section_bfd_owner (section
);
18033 const gdb_byte
*abbrev_ptr
;
18034 struct abbrev_info
*cur_abbrev
;
18035 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
18036 unsigned int abbrev_form
;
18037 struct attr_abbrev
*cur_attrs
;
18038 unsigned int allocated_attrs
;
18040 abbrev_table_up
abbrev_table (new struct abbrev_table (sect_off
));
18042 dwarf2_read_section (objfile
, section
);
18043 abbrev_ptr
= section
->buffer
+ to_underlying (sect_off
);
18044 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18045 abbrev_ptr
+= bytes_read
;
18047 allocated_attrs
= ATTR_ALLOC_CHUNK
;
18048 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
18050 /* Loop until we reach an abbrev number of 0. */
18051 while (abbrev_number
)
18053 cur_abbrev
= abbrev_table
->alloc_abbrev ();
18055 /* read in abbrev header */
18056 cur_abbrev
->number
= abbrev_number
;
18058 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18059 abbrev_ptr
+= bytes_read
;
18060 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
18063 /* now read in declarations */
18066 LONGEST implicit_const
;
18068 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18069 abbrev_ptr
+= bytes_read
;
18070 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18071 abbrev_ptr
+= bytes_read
;
18072 if (abbrev_form
== DW_FORM_implicit_const
)
18074 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
18076 abbrev_ptr
+= bytes_read
;
18080 /* Initialize it due to a false compiler warning. */
18081 implicit_const
= -1;
18084 if (abbrev_name
== 0)
18087 if (cur_abbrev
->num_attrs
== allocated_attrs
)
18089 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
18091 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
18094 cur_attrs
[cur_abbrev
->num_attrs
].name
18095 = (enum dwarf_attribute
) abbrev_name
;
18096 cur_attrs
[cur_abbrev
->num_attrs
].form
18097 = (enum dwarf_form
) abbrev_form
;
18098 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
18099 ++cur_abbrev
->num_attrs
;
18102 cur_abbrev
->attrs
=
18103 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
18104 cur_abbrev
->num_attrs
);
18105 memcpy (cur_abbrev
->attrs
, cur_attrs
,
18106 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
18108 abbrev_table
->add_abbrev (abbrev_number
, cur_abbrev
);
18110 /* Get next abbreviation.
18111 Under Irix6 the abbreviations for a compilation unit are not
18112 always properly terminated with an abbrev number of 0.
18113 Exit loop if we encounter an abbreviation which we have
18114 already read (which means we are about to read the abbreviations
18115 for the next compile unit) or if the end of the abbreviation
18116 table is reached. */
18117 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
18119 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18120 abbrev_ptr
+= bytes_read
;
18121 if (abbrev_table
->lookup_abbrev (abbrev_number
) != NULL
)
18126 return abbrev_table
;
18129 /* Returns nonzero if TAG represents a type that we might generate a partial
18133 is_type_tag_for_partial (int tag
)
18138 /* Some types that would be reasonable to generate partial symbols for,
18139 that we don't at present. */
18140 case DW_TAG_array_type
:
18141 case DW_TAG_file_type
:
18142 case DW_TAG_ptr_to_member_type
:
18143 case DW_TAG_set_type
:
18144 case DW_TAG_string_type
:
18145 case DW_TAG_subroutine_type
:
18147 case DW_TAG_base_type
:
18148 case DW_TAG_class_type
:
18149 case DW_TAG_interface_type
:
18150 case DW_TAG_enumeration_type
:
18151 case DW_TAG_structure_type
:
18152 case DW_TAG_subrange_type
:
18153 case DW_TAG_typedef
:
18154 case DW_TAG_union_type
:
18161 /* Load all DIEs that are interesting for partial symbols into memory. */
18163 static struct partial_die_info
*
18164 load_partial_dies (const struct die_reader_specs
*reader
,
18165 const gdb_byte
*info_ptr
, int building_psymtab
)
18167 struct dwarf2_cu
*cu
= reader
->cu
;
18168 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18169 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18170 unsigned int bytes_read
;
18171 unsigned int load_all
= 0;
18172 int nesting_level
= 1;
18177 gdb_assert (cu
->per_cu
!= NULL
);
18178 if (cu
->per_cu
->load_all_dies
)
18182 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18186 &cu
->comp_unit_obstack
,
18187 hashtab_obstack_allocate
,
18188 dummy_obstack_deallocate
);
18192 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18194 /* A NULL abbrev means the end of a series of children. */
18195 if (abbrev
== NULL
)
18197 if (--nesting_level
== 0)
18200 info_ptr
+= bytes_read
;
18201 last_die
= parent_die
;
18202 parent_die
= parent_die
->die_parent
;
18206 /* Check for template arguments. We never save these; if
18207 they're seen, we just mark the parent, and go on our way. */
18208 if (parent_die
!= NULL
18209 && cu
->language
== language_cplus
18210 && (abbrev
->tag
== DW_TAG_template_type_param
18211 || abbrev
->tag
== DW_TAG_template_value_param
))
18213 parent_die
->has_template_arguments
= 1;
18217 /* We don't need a partial DIE for the template argument. */
18218 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18223 /* We only recurse into c++ subprograms looking for template arguments.
18224 Skip their other children. */
18226 && cu
->language
== language_cplus
18227 && parent_die
!= NULL
18228 && parent_die
->tag
== DW_TAG_subprogram
)
18230 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18234 /* Check whether this DIE is interesting enough to save. Normally
18235 we would not be interested in members here, but there may be
18236 later variables referencing them via DW_AT_specification (for
18237 static members). */
18239 && !is_type_tag_for_partial (abbrev
->tag
)
18240 && abbrev
->tag
!= DW_TAG_constant
18241 && abbrev
->tag
!= DW_TAG_enumerator
18242 && abbrev
->tag
!= DW_TAG_subprogram
18243 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18244 && abbrev
->tag
!= DW_TAG_lexical_block
18245 && abbrev
->tag
!= DW_TAG_variable
18246 && abbrev
->tag
!= DW_TAG_namespace
18247 && abbrev
->tag
!= DW_TAG_module
18248 && abbrev
->tag
!= DW_TAG_member
18249 && abbrev
->tag
!= DW_TAG_imported_unit
18250 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18252 /* Otherwise we skip to the next sibling, if any. */
18253 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18257 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18260 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18262 /* This two-pass algorithm for processing partial symbols has a
18263 high cost in cache pressure. Thus, handle some simple cases
18264 here which cover the majority of C partial symbols. DIEs
18265 which neither have specification tags in them, nor could have
18266 specification tags elsewhere pointing at them, can simply be
18267 processed and discarded.
18269 This segment is also optional; scan_partial_symbols and
18270 add_partial_symbol will handle these DIEs if we chain
18271 them in normally. When compilers which do not emit large
18272 quantities of duplicate debug information are more common,
18273 this code can probably be removed. */
18275 /* Any complete simple types at the top level (pretty much all
18276 of them, for a language without namespaces), can be processed
18278 if (parent_die
== NULL
18279 && pdi
.has_specification
== 0
18280 && pdi
.is_declaration
== 0
18281 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18282 || pdi
.tag
== DW_TAG_base_type
18283 || pdi
.tag
== DW_TAG_subrange_type
))
18285 if (building_psymtab
&& pdi
.name
!= NULL
)
18286 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18287 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
18288 &objfile
->static_psymbols
,
18289 0, cu
->language
, objfile
);
18290 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18294 /* The exception for DW_TAG_typedef with has_children above is
18295 a workaround of GCC PR debug/47510. In the case of this complaint
18296 type_name_or_error will error on such types later.
18298 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18299 it could not find the child DIEs referenced later, this is checked
18300 above. In correct DWARF DW_TAG_typedef should have no children. */
18302 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18303 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18304 "- DIE at %s [in module %s]"),
18305 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18307 /* If we're at the second level, and we're an enumerator, and
18308 our parent has no specification (meaning possibly lives in a
18309 namespace elsewhere), then we can add the partial symbol now
18310 instead of queueing it. */
18311 if (pdi
.tag
== DW_TAG_enumerator
18312 && parent_die
!= NULL
18313 && parent_die
->die_parent
== NULL
18314 && parent_die
->tag
== DW_TAG_enumeration_type
18315 && parent_die
->has_specification
== 0)
18317 if (pdi
.name
== NULL
)
18318 complaint (_("malformed enumerator DIE ignored"));
18319 else if (building_psymtab
)
18320 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18321 VAR_DOMAIN
, LOC_CONST
, -1,
18322 cu
->language
== language_cplus
18323 ? &objfile
->global_psymbols
18324 : &objfile
->static_psymbols
,
18325 0, cu
->language
, objfile
);
18327 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18331 struct partial_die_info
*part_die
18332 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18334 /* We'll save this DIE so link it in. */
18335 part_die
->die_parent
= parent_die
;
18336 part_die
->die_sibling
= NULL
;
18337 part_die
->die_child
= NULL
;
18339 if (last_die
&& last_die
== parent_die
)
18340 last_die
->die_child
= part_die
;
18342 last_die
->die_sibling
= part_die
;
18344 last_die
= part_die
;
18346 if (first_die
== NULL
)
18347 first_die
= part_die
;
18349 /* Maybe add the DIE to the hash table. Not all DIEs that we
18350 find interesting need to be in the hash table, because we
18351 also have the parent/sibling/child chains; only those that we
18352 might refer to by offset later during partial symbol reading.
18354 For now this means things that might have be the target of a
18355 DW_AT_specification, DW_AT_abstract_origin, or
18356 DW_AT_extension. DW_AT_extension will refer only to
18357 namespaces; DW_AT_abstract_origin refers to functions (and
18358 many things under the function DIE, but we do not recurse
18359 into function DIEs during partial symbol reading) and
18360 possibly variables as well; DW_AT_specification refers to
18361 declarations. Declarations ought to have the DW_AT_declaration
18362 flag. It happens that GCC forgets to put it in sometimes, but
18363 only for functions, not for types.
18365 Adding more things than necessary to the hash table is harmless
18366 except for the performance cost. Adding too few will result in
18367 wasted time in find_partial_die, when we reread the compilation
18368 unit with load_all_dies set. */
18371 || abbrev
->tag
== DW_TAG_constant
18372 || abbrev
->tag
== DW_TAG_subprogram
18373 || abbrev
->tag
== DW_TAG_variable
18374 || abbrev
->tag
== DW_TAG_namespace
18375 || part_die
->is_declaration
)
18379 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18380 to_underlying (part_die
->sect_off
),
18385 /* For some DIEs we want to follow their children (if any). For C
18386 we have no reason to follow the children of structures; for other
18387 languages we have to, so that we can get at method physnames
18388 to infer fully qualified class names, for DW_AT_specification,
18389 and for C++ template arguments. For C++, we also look one level
18390 inside functions to find template arguments (if the name of the
18391 function does not already contain the template arguments).
18393 For Ada, we need to scan the children of subprograms and lexical
18394 blocks as well because Ada allows the definition of nested
18395 entities that could be interesting for the debugger, such as
18396 nested subprograms for instance. */
18397 if (last_die
->has_children
18399 || last_die
->tag
== DW_TAG_namespace
18400 || last_die
->tag
== DW_TAG_module
18401 || last_die
->tag
== DW_TAG_enumeration_type
18402 || (cu
->language
== language_cplus
18403 && last_die
->tag
== DW_TAG_subprogram
18404 && (last_die
->name
== NULL
18405 || strchr (last_die
->name
, '<') == NULL
))
18406 || (cu
->language
!= language_c
18407 && (last_die
->tag
== DW_TAG_class_type
18408 || last_die
->tag
== DW_TAG_interface_type
18409 || last_die
->tag
== DW_TAG_structure_type
18410 || last_die
->tag
== DW_TAG_union_type
))
18411 || (cu
->language
== language_ada
18412 && (last_die
->tag
== DW_TAG_subprogram
18413 || last_die
->tag
== DW_TAG_lexical_block
))))
18416 parent_die
= last_die
;
18420 /* Otherwise we skip to the next sibling, if any. */
18421 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18423 /* Back to the top, do it again. */
18427 partial_die_info::partial_die_info (sect_offset sect_off_
,
18428 struct abbrev_info
*abbrev
)
18429 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18433 /* Read a minimal amount of information into the minimal die structure.
18434 INFO_PTR should point just after the initial uleb128 of a DIE. */
18437 partial_die_info::read (const struct die_reader_specs
*reader
,
18438 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18440 struct dwarf2_cu
*cu
= reader
->cu
;
18441 struct dwarf2_per_objfile
*dwarf2_per_objfile
18442 = cu
->per_cu
->dwarf2_per_objfile
;
18444 int has_low_pc_attr
= 0;
18445 int has_high_pc_attr
= 0;
18446 int high_pc_relative
= 0;
18448 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18450 struct attribute attr
;
18452 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
], info_ptr
);
18454 /* Store the data if it is of an attribute we want to keep in a
18455 partial symbol table. */
18461 case DW_TAG_compile_unit
:
18462 case DW_TAG_partial_unit
:
18463 case DW_TAG_type_unit
:
18464 /* Compilation units have a DW_AT_name that is a filename, not
18465 a source language identifier. */
18466 case DW_TAG_enumeration_type
:
18467 case DW_TAG_enumerator
:
18468 /* These tags always have simple identifiers already; no need
18469 to canonicalize them. */
18470 name
= DW_STRING (&attr
);
18474 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18477 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
18478 &objfile
->per_bfd
->storage_obstack
);
18483 case DW_AT_linkage_name
:
18484 case DW_AT_MIPS_linkage_name
:
18485 /* Note that both forms of linkage name might appear. We
18486 assume they will be the same, and we only store the last
18488 if (cu
->language
== language_ada
)
18489 name
= DW_STRING (&attr
);
18490 linkage_name
= DW_STRING (&attr
);
18493 has_low_pc_attr
= 1;
18494 lowpc
= attr_value_as_address (&attr
);
18496 case DW_AT_high_pc
:
18497 has_high_pc_attr
= 1;
18498 highpc
= attr_value_as_address (&attr
);
18499 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
18500 high_pc_relative
= 1;
18502 case DW_AT_location
:
18503 /* Support the .debug_loc offsets. */
18504 if (attr_form_is_block (&attr
))
18506 d
.locdesc
= DW_BLOCK (&attr
);
18508 else if (attr_form_is_section_offset (&attr
))
18510 dwarf2_complex_location_expr_complaint ();
18514 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18515 "partial symbol information");
18518 case DW_AT_external
:
18519 is_external
= DW_UNSND (&attr
);
18521 case DW_AT_declaration
:
18522 is_declaration
= DW_UNSND (&attr
);
18527 case DW_AT_abstract_origin
:
18528 case DW_AT_specification
:
18529 case DW_AT_extension
:
18530 has_specification
= 1;
18531 spec_offset
= dwarf2_get_ref_die_offset (&attr
);
18532 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18533 || cu
->per_cu
->is_dwz
);
18535 case DW_AT_sibling
:
18536 /* Ignore absolute siblings, they might point outside of
18537 the current compile unit. */
18538 if (attr
.form
== DW_FORM_ref_addr
)
18539 complaint (_("ignoring absolute DW_AT_sibling"));
18542 const gdb_byte
*buffer
= reader
->buffer
;
18543 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
18544 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18546 if (sibling_ptr
< info_ptr
)
18547 complaint (_("DW_AT_sibling points backwards"));
18548 else if (sibling_ptr
> reader
->buffer_end
)
18549 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
18551 sibling
= sibling_ptr
;
18554 case DW_AT_byte_size
:
18557 case DW_AT_const_value
:
18558 has_const_value
= 1;
18560 case DW_AT_calling_convention
:
18561 /* DWARF doesn't provide a way to identify a program's source-level
18562 entry point. DW_AT_calling_convention attributes are only meant
18563 to describe functions' calling conventions.
18565 However, because it's a necessary piece of information in
18566 Fortran, and before DWARF 4 DW_CC_program was the only
18567 piece of debugging information whose definition refers to
18568 a 'main program' at all, several compilers marked Fortran
18569 main programs with DW_CC_program --- even when those
18570 functions use the standard calling conventions.
18572 Although DWARF now specifies a way to provide this
18573 information, we support this practice for backward
18575 if (DW_UNSND (&attr
) == DW_CC_program
18576 && cu
->language
== language_fortran
)
18577 main_subprogram
= 1;
18580 if (DW_UNSND (&attr
) == DW_INL_inlined
18581 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18582 may_be_inlined
= 1;
18586 if (tag
== DW_TAG_imported_unit
)
18588 d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
18589 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18590 || cu
->per_cu
->is_dwz
);
18594 case DW_AT_main_subprogram
:
18595 main_subprogram
= DW_UNSND (&attr
);
18603 if (high_pc_relative
)
18606 if (has_low_pc_attr
&& has_high_pc_attr
)
18608 /* When using the GNU linker, .gnu.linkonce. sections are used to
18609 eliminate duplicate copies of functions and vtables and such.
18610 The linker will arbitrarily choose one and discard the others.
18611 The AT_*_pc values for such functions refer to local labels in
18612 these sections. If the section from that file was discarded, the
18613 labels are not in the output, so the relocs get a value of 0.
18614 If this is a discarded function, mark the pc bounds as invalid,
18615 so that GDB will ignore it. */
18616 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18618 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18619 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18621 complaint (_("DW_AT_low_pc %s is zero "
18622 "for DIE at %s [in module %s]"),
18623 paddress (gdbarch
, lowpc
),
18624 sect_offset_str (sect_off
),
18625 objfile_name (objfile
));
18627 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18628 else if (lowpc
>= highpc
)
18630 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18631 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18633 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18634 "for DIE at %s [in module %s]"),
18635 paddress (gdbarch
, lowpc
),
18636 paddress (gdbarch
, highpc
),
18637 sect_offset_str (sect_off
),
18638 objfile_name (objfile
));
18647 /* Find a cached partial DIE at OFFSET in CU. */
18649 struct partial_die_info
*
18650 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18652 struct partial_die_info
*lookup_die
= NULL
;
18653 struct partial_die_info
part_die (sect_off
);
18655 lookup_die
= ((struct partial_die_info
*)
18656 htab_find_with_hash (partial_dies
, &part_die
,
18657 to_underlying (sect_off
)));
18662 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18663 except in the case of .debug_types DIEs which do not reference
18664 outside their CU (they do however referencing other types via
18665 DW_FORM_ref_sig8). */
18667 static struct partial_die_info
*
18668 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18670 struct dwarf2_per_objfile
*dwarf2_per_objfile
18671 = cu
->per_cu
->dwarf2_per_objfile
;
18672 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18673 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18674 struct partial_die_info
*pd
= NULL
;
18676 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18677 && offset_in_cu_p (&cu
->header
, sect_off
))
18679 pd
= cu
->find_partial_die (sect_off
);
18682 /* We missed recording what we needed.
18683 Load all dies and try again. */
18684 per_cu
= cu
->per_cu
;
18688 /* TUs don't reference other CUs/TUs (except via type signatures). */
18689 if (cu
->per_cu
->is_debug_types
)
18691 error (_("Dwarf Error: Type Unit at offset %s contains"
18692 " external reference to offset %s [in module %s].\n"),
18693 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18694 bfd_get_filename (objfile
->obfd
));
18696 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18697 dwarf2_per_objfile
);
18699 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18700 load_partial_comp_unit (per_cu
);
18702 per_cu
->cu
->last_used
= 0;
18703 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18706 /* If we didn't find it, and not all dies have been loaded,
18707 load them all and try again. */
18709 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18711 per_cu
->load_all_dies
= 1;
18713 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18714 THIS_CU->cu may already be in use. So we can't just free it and
18715 replace its DIEs with the ones we read in. Instead, we leave those
18716 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18717 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18719 load_partial_comp_unit (per_cu
);
18721 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18725 internal_error (__FILE__
, __LINE__
,
18726 _("could not find partial DIE %s "
18727 "in cache [from module %s]\n"),
18728 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18732 /* See if we can figure out if the class lives in a namespace. We do
18733 this by looking for a member function; its demangled name will
18734 contain namespace info, if there is any. */
18737 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18738 struct dwarf2_cu
*cu
)
18740 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18741 what template types look like, because the demangler
18742 frequently doesn't give the same name as the debug info. We
18743 could fix this by only using the demangled name to get the
18744 prefix (but see comment in read_structure_type). */
18746 struct partial_die_info
*real_pdi
;
18747 struct partial_die_info
*child_pdi
;
18749 /* If this DIE (this DIE's specification, if any) has a parent, then
18750 we should not do this. We'll prepend the parent's fully qualified
18751 name when we create the partial symbol. */
18753 real_pdi
= struct_pdi
;
18754 while (real_pdi
->has_specification
)
18755 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
18756 real_pdi
->spec_is_dwz
, cu
);
18758 if (real_pdi
->die_parent
!= NULL
)
18761 for (child_pdi
= struct_pdi
->die_child
;
18763 child_pdi
= child_pdi
->die_sibling
)
18765 if (child_pdi
->tag
== DW_TAG_subprogram
18766 && child_pdi
->linkage_name
!= NULL
)
18768 char *actual_class_name
18769 = language_class_name_from_physname (cu
->language_defn
,
18770 child_pdi
->linkage_name
);
18771 if (actual_class_name
!= NULL
)
18773 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18776 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
18778 strlen (actual_class_name
)));
18779 xfree (actual_class_name
);
18787 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18789 /* Once we've fixed up a die, there's no point in doing so again.
18790 This also avoids a memory leak if we were to call
18791 guess_partial_die_structure_name multiple times. */
18795 /* If we found a reference attribute and the DIE has no name, try
18796 to find a name in the referred to DIE. */
18798 if (name
== NULL
&& has_specification
)
18800 struct partial_die_info
*spec_die
;
18802 spec_die
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18804 spec_die
->fixup (cu
);
18806 if (spec_die
->name
)
18808 name
= spec_die
->name
;
18810 /* Copy DW_AT_external attribute if it is set. */
18811 if (spec_die
->is_external
)
18812 is_external
= spec_die
->is_external
;
18816 /* Set default names for some unnamed DIEs. */
18818 if (name
== NULL
&& tag
== DW_TAG_namespace
)
18819 name
= CP_ANONYMOUS_NAMESPACE_STR
;
18821 /* If there is no parent die to provide a namespace, and there are
18822 children, see if we can determine the namespace from their linkage
18824 if (cu
->language
== language_cplus
18825 && !VEC_empty (dwarf2_section_info_def
,
18826 cu
->per_cu
->dwarf2_per_objfile
->types
)
18827 && die_parent
== NULL
18829 && (tag
== DW_TAG_class_type
18830 || tag
== DW_TAG_structure_type
18831 || tag
== DW_TAG_union_type
))
18832 guess_partial_die_structure_name (this, cu
);
18834 /* GCC might emit a nameless struct or union that has a linkage
18835 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18837 && (tag
== DW_TAG_class_type
18838 || tag
== DW_TAG_interface_type
18839 || tag
== DW_TAG_structure_type
18840 || tag
== DW_TAG_union_type
)
18841 && linkage_name
!= NULL
)
18845 demangled
= gdb_demangle (linkage_name
, DMGL_TYPES
);
18850 /* Strip any leading namespaces/classes, keep only the base name.
18851 DW_AT_name for named DIEs does not contain the prefixes. */
18852 base
= strrchr (demangled
, ':');
18853 if (base
&& base
> demangled
&& base
[-1] == ':')
18858 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18861 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
18862 base
, strlen (base
)));
18870 /* Read an attribute value described by an attribute form. */
18872 static const gdb_byte
*
18873 read_attribute_value (const struct die_reader_specs
*reader
,
18874 struct attribute
*attr
, unsigned form
,
18875 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
18877 struct dwarf2_cu
*cu
= reader
->cu
;
18878 struct dwarf2_per_objfile
*dwarf2_per_objfile
18879 = cu
->per_cu
->dwarf2_per_objfile
;
18880 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18881 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18882 bfd
*abfd
= reader
->abfd
;
18883 struct comp_unit_head
*cu_header
= &cu
->header
;
18884 unsigned int bytes_read
;
18885 struct dwarf_block
*blk
;
18887 attr
->form
= (enum dwarf_form
) form
;
18890 case DW_FORM_ref_addr
:
18891 if (cu
->header
.version
== 2)
18892 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18894 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
18895 &cu
->header
, &bytes_read
);
18896 info_ptr
+= bytes_read
;
18898 case DW_FORM_GNU_ref_alt
:
18899 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18900 info_ptr
+= bytes_read
;
18903 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18904 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
18905 info_ptr
+= bytes_read
;
18907 case DW_FORM_block2
:
18908 blk
= dwarf_alloc_block (cu
);
18909 blk
->size
= read_2_bytes (abfd
, info_ptr
);
18911 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18912 info_ptr
+= blk
->size
;
18913 DW_BLOCK (attr
) = blk
;
18915 case DW_FORM_block4
:
18916 blk
= dwarf_alloc_block (cu
);
18917 blk
->size
= read_4_bytes (abfd
, info_ptr
);
18919 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18920 info_ptr
+= blk
->size
;
18921 DW_BLOCK (attr
) = blk
;
18923 case DW_FORM_data2
:
18924 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
18927 case DW_FORM_data4
:
18928 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
18931 case DW_FORM_data8
:
18932 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
18935 case DW_FORM_data16
:
18936 blk
= dwarf_alloc_block (cu
);
18938 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
18940 DW_BLOCK (attr
) = blk
;
18942 case DW_FORM_sec_offset
:
18943 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18944 info_ptr
+= bytes_read
;
18946 case DW_FORM_string
:
18947 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
18948 DW_STRING_IS_CANONICAL (attr
) = 0;
18949 info_ptr
+= bytes_read
;
18952 if (!cu
->per_cu
->is_dwz
)
18954 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
18955 abfd
, info_ptr
, cu_header
,
18957 DW_STRING_IS_CANONICAL (attr
) = 0;
18958 info_ptr
+= bytes_read
;
18962 case DW_FORM_line_strp
:
18963 if (!cu
->per_cu
->is_dwz
)
18965 DW_STRING (attr
) = read_indirect_line_string (dwarf2_per_objfile
,
18967 cu_header
, &bytes_read
);
18968 DW_STRING_IS_CANONICAL (attr
) = 0;
18969 info_ptr
+= bytes_read
;
18973 case DW_FORM_GNU_strp_alt
:
18975 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
18976 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
18979 DW_STRING (attr
) = read_indirect_string_from_dwz (objfile
,
18981 DW_STRING_IS_CANONICAL (attr
) = 0;
18982 info_ptr
+= bytes_read
;
18985 case DW_FORM_exprloc
:
18986 case DW_FORM_block
:
18987 blk
= dwarf_alloc_block (cu
);
18988 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18989 info_ptr
+= bytes_read
;
18990 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18991 info_ptr
+= blk
->size
;
18992 DW_BLOCK (attr
) = blk
;
18994 case DW_FORM_block1
:
18995 blk
= dwarf_alloc_block (cu
);
18996 blk
->size
= read_1_byte (abfd
, info_ptr
);
18998 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18999 info_ptr
+= blk
->size
;
19000 DW_BLOCK (attr
) = blk
;
19002 case DW_FORM_data1
:
19003 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19007 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19010 case DW_FORM_flag_present
:
19011 DW_UNSND (attr
) = 1;
19013 case DW_FORM_sdata
:
19014 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19015 info_ptr
+= bytes_read
;
19017 case DW_FORM_udata
:
19018 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19019 info_ptr
+= bytes_read
;
19022 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19023 + read_1_byte (abfd
, info_ptr
));
19027 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19028 + read_2_bytes (abfd
, info_ptr
));
19032 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19033 + read_4_bytes (abfd
, info_ptr
));
19037 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19038 + read_8_bytes (abfd
, info_ptr
));
19041 case DW_FORM_ref_sig8
:
19042 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19045 case DW_FORM_ref_udata
:
19046 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19047 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19048 info_ptr
+= bytes_read
;
19050 case DW_FORM_indirect
:
19051 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19052 info_ptr
+= bytes_read
;
19053 if (form
== DW_FORM_implicit_const
)
19055 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19056 info_ptr
+= bytes_read
;
19058 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19061 case DW_FORM_implicit_const
:
19062 DW_SND (attr
) = implicit_const
;
19064 case DW_FORM_GNU_addr_index
:
19065 if (reader
->dwo_file
== NULL
)
19067 /* For now flag a hard error.
19068 Later we can turn this into a complaint. */
19069 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19070 dwarf_form_name (form
),
19071 bfd_get_filename (abfd
));
19073 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
19074 info_ptr
+= bytes_read
;
19076 case DW_FORM_GNU_str_index
:
19077 if (reader
->dwo_file
== NULL
)
19079 /* For now flag a hard error.
19080 Later we can turn this into a complaint if warranted. */
19081 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19082 dwarf_form_name (form
),
19083 bfd_get_filename (abfd
));
19086 ULONGEST str_index
=
19087 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19089 DW_STRING (attr
) = read_str_index (reader
, str_index
);
19090 DW_STRING_IS_CANONICAL (attr
) = 0;
19091 info_ptr
+= bytes_read
;
19095 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19096 dwarf_form_name (form
),
19097 bfd_get_filename (abfd
));
19101 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
19102 attr
->form
= DW_FORM_GNU_ref_alt
;
19104 /* We have seen instances where the compiler tried to emit a byte
19105 size attribute of -1 which ended up being encoded as an unsigned
19106 0xffffffff. Although 0xffffffff is technically a valid size value,
19107 an object of this size seems pretty unlikely so we can relatively
19108 safely treat these cases as if the size attribute was invalid and
19109 treat them as zero by default. */
19110 if (attr
->name
== DW_AT_byte_size
19111 && form
== DW_FORM_data4
19112 && DW_UNSND (attr
) >= 0xffffffff)
19115 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19116 hex_string (DW_UNSND (attr
)));
19117 DW_UNSND (attr
) = 0;
19123 /* Read an attribute described by an abbreviated attribute. */
19125 static const gdb_byte
*
19126 read_attribute (const struct die_reader_specs
*reader
,
19127 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19128 const gdb_byte
*info_ptr
)
19130 attr
->name
= abbrev
->name
;
19131 return read_attribute_value (reader
, attr
, abbrev
->form
,
19132 abbrev
->implicit_const
, info_ptr
);
19135 /* Read dwarf information from a buffer. */
19137 static unsigned int
19138 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
19140 return bfd_get_8 (abfd
, buf
);
19144 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
19146 return bfd_get_signed_8 (abfd
, buf
);
19149 static unsigned int
19150 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19152 return bfd_get_16 (abfd
, buf
);
19156 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19158 return bfd_get_signed_16 (abfd
, buf
);
19161 static unsigned int
19162 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19164 return bfd_get_32 (abfd
, buf
);
19168 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19170 return bfd_get_signed_32 (abfd
, buf
);
19174 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19176 return bfd_get_64 (abfd
, buf
);
19180 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
19181 unsigned int *bytes_read
)
19183 struct comp_unit_head
*cu_header
= &cu
->header
;
19184 CORE_ADDR retval
= 0;
19186 if (cu_header
->signed_addr_p
)
19188 switch (cu_header
->addr_size
)
19191 retval
= bfd_get_signed_16 (abfd
, buf
);
19194 retval
= bfd_get_signed_32 (abfd
, buf
);
19197 retval
= bfd_get_signed_64 (abfd
, buf
);
19200 internal_error (__FILE__
, __LINE__
,
19201 _("read_address: bad switch, signed [in module %s]"),
19202 bfd_get_filename (abfd
));
19207 switch (cu_header
->addr_size
)
19210 retval
= bfd_get_16 (abfd
, buf
);
19213 retval
= bfd_get_32 (abfd
, buf
);
19216 retval
= bfd_get_64 (abfd
, buf
);
19219 internal_error (__FILE__
, __LINE__
,
19220 _("read_address: bad switch, "
19221 "unsigned [in module %s]"),
19222 bfd_get_filename (abfd
));
19226 *bytes_read
= cu_header
->addr_size
;
19230 /* Read the initial length from a section. The (draft) DWARF 3
19231 specification allows the initial length to take up either 4 bytes
19232 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
19233 bytes describe the length and all offsets will be 8 bytes in length
19236 An older, non-standard 64-bit format is also handled by this
19237 function. The older format in question stores the initial length
19238 as an 8-byte quantity without an escape value. Lengths greater
19239 than 2^32 aren't very common which means that the initial 4 bytes
19240 is almost always zero. Since a length value of zero doesn't make
19241 sense for the 32-bit format, this initial zero can be considered to
19242 be an escape value which indicates the presence of the older 64-bit
19243 format. As written, the code can't detect (old format) lengths
19244 greater than 4GB. If it becomes necessary to handle lengths
19245 somewhat larger than 4GB, we could allow other small values (such
19246 as the non-sensical values of 1, 2, and 3) to also be used as
19247 escape values indicating the presence of the old format.
19249 The value returned via bytes_read should be used to increment the
19250 relevant pointer after calling read_initial_length().
19252 [ Note: read_initial_length() and read_offset() are based on the
19253 document entitled "DWARF Debugging Information Format", revision
19254 3, draft 8, dated November 19, 2001. This document was obtained
19257 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
19259 This document is only a draft and is subject to change. (So beware.)
19261 Details regarding the older, non-standard 64-bit format were
19262 determined empirically by examining 64-bit ELF files produced by
19263 the SGI toolchain on an IRIX 6.5 machine.
19265 - Kevin, July 16, 2002
19269 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
19271 LONGEST length
= bfd_get_32 (abfd
, buf
);
19273 if (length
== 0xffffffff)
19275 length
= bfd_get_64 (abfd
, buf
+ 4);
19278 else if (length
== 0)
19280 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
19281 length
= bfd_get_64 (abfd
, buf
);
19292 /* Cover function for read_initial_length.
19293 Returns the length of the object at BUF, and stores the size of the
19294 initial length in *BYTES_READ and stores the size that offsets will be in
19296 If the initial length size is not equivalent to that specified in
19297 CU_HEADER then issue a complaint.
19298 This is useful when reading non-comp-unit headers. */
19301 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
19302 const struct comp_unit_head
*cu_header
,
19303 unsigned int *bytes_read
,
19304 unsigned int *offset_size
)
19306 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
19308 gdb_assert (cu_header
->initial_length_size
== 4
19309 || cu_header
->initial_length_size
== 8
19310 || cu_header
->initial_length_size
== 12);
19312 if (cu_header
->initial_length_size
!= *bytes_read
)
19313 complaint (_("intermixed 32-bit and 64-bit DWARF sections"));
19315 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
19319 /* Read an offset from the data stream. The size of the offset is
19320 given by cu_header->offset_size. */
19323 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
19324 const struct comp_unit_head
*cu_header
,
19325 unsigned int *bytes_read
)
19327 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
19329 *bytes_read
= cu_header
->offset_size
;
19333 /* Read an offset from the data stream. */
19336 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
19338 LONGEST retval
= 0;
19340 switch (offset_size
)
19343 retval
= bfd_get_32 (abfd
, buf
);
19346 retval
= bfd_get_64 (abfd
, buf
);
19349 internal_error (__FILE__
, __LINE__
,
19350 _("read_offset_1: bad switch [in module %s]"),
19351 bfd_get_filename (abfd
));
19357 static const gdb_byte
*
19358 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
19360 /* If the size of a host char is 8 bits, we can return a pointer
19361 to the buffer, otherwise we have to copy the data to a buffer
19362 allocated on the temporary obstack. */
19363 gdb_assert (HOST_CHAR_BIT
== 8);
19367 static const char *
19368 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
19369 unsigned int *bytes_read_ptr
)
19371 /* If the size of a host char is 8 bits, we can return a pointer
19372 to the string, otherwise we have to copy the string to a buffer
19373 allocated on the temporary obstack. */
19374 gdb_assert (HOST_CHAR_BIT
== 8);
19377 *bytes_read_ptr
= 1;
19380 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
19381 return (const char *) buf
;
19384 /* Return pointer to string at section SECT offset STR_OFFSET with error
19385 reporting strings FORM_NAME and SECT_NAME. */
19387 static const char *
19388 read_indirect_string_at_offset_from (struct objfile
*objfile
,
19389 bfd
*abfd
, LONGEST str_offset
,
19390 struct dwarf2_section_info
*sect
,
19391 const char *form_name
,
19392 const char *sect_name
)
19394 dwarf2_read_section (objfile
, sect
);
19395 if (sect
->buffer
== NULL
)
19396 error (_("%s used without %s section [in module %s]"),
19397 form_name
, sect_name
, bfd_get_filename (abfd
));
19398 if (str_offset
>= sect
->size
)
19399 error (_("%s pointing outside of %s section [in module %s]"),
19400 form_name
, sect_name
, bfd_get_filename (abfd
));
19401 gdb_assert (HOST_CHAR_BIT
== 8);
19402 if (sect
->buffer
[str_offset
] == '\0')
19404 return (const char *) (sect
->buffer
+ str_offset
);
19407 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19409 static const char *
19410 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19411 bfd
*abfd
, LONGEST str_offset
)
19413 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19415 &dwarf2_per_objfile
->str
,
19416 "DW_FORM_strp", ".debug_str");
19419 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
19421 static const char *
19422 read_indirect_line_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19423 bfd
*abfd
, LONGEST str_offset
)
19425 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19427 &dwarf2_per_objfile
->line_str
,
19428 "DW_FORM_line_strp",
19429 ".debug_line_str");
19432 /* Read a string at offset STR_OFFSET in the .debug_str section from
19433 the .dwz file DWZ. Throw an error if the offset is too large. If
19434 the string consists of a single NUL byte, return NULL; otherwise
19435 return a pointer to the string. */
19437 static const char *
19438 read_indirect_string_from_dwz (struct objfile
*objfile
, struct dwz_file
*dwz
,
19439 LONGEST str_offset
)
19441 dwarf2_read_section (objfile
, &dwz
->str
);
19443 if (dwz
->str
.buffer
== NULL
)
19444 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
19445 "section [in module %s]"),
19446 bfd_get_filename (dwz
->dwz_bfd
));
19447 if (str_offset
>= dwz
->str
.size
)
19448 error (_("DW_FORM_GNU_strp_alt pointing outside of "
19449 ".debug_str section [in module %s]"),
19450 bfd_get_filename (dwz
->dwz_bfd
));
19451 gdb_assert (HOST_CHAR_BIT
== 8);
19452 if (dwz
->str
.buffer
[str_offset
] == '\0')
19454 return (const char *) (dwz
->str
.buffer
+ str_offset
);
19457 /* Return pointer to string at .debug_str offset as read from BUF.
19458 BUF is assumed to be in a compilation unit described by CU_HEADER.
19459 Return *BYTES_READ_PTR count of bytes read from BUF. */
19461 static const char *
19462 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19463 const gdb_byte
*buf
,
19464 const struct comp_unit_head
*cu_header
,
19465 unsigned int *bytes_read_ptr
)
19467 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19469 return read_indirect_string_at_offset (dwarf2_per_objfile
, abfd
, str_offset
);
19472 /* Return pointer to string at .debug_line_str offset as read from BUF.
19473 BUF is assumed to be in a compilation unit described by CU_HEADER.
19474 Return *BYTES_READ_PTR count of bytes read from BUF. */
19476 static const char *
19477 read_indirect_line_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19478 bfd
*abfd
, const gdb_byte
*buf
,
19479 const struct comp_unit_head
*cu_header
,
19480 unsigned int *bytes_read_ptr
)
19482 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19484 return read_indirect_line_string_at_offset (dwarf2_per_objfile
, abfd
,
19489 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19490 unsigned int *bytes_read_ptr
)
19493 unsigned int num_read
;
19495 unsigned char byte
;
19502 byte
= bfd_get_8 (abfd
, buf
);
19505 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19506 if ((byte
& 128) == 0)
19512 *bytes_read_ptr
= num_read
;
19517 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19518 unsigned int *bytes_read_ptr
)
19521 int shift
, num_read
;
19522 unsigned char byte
;
19529 byte
= bfd_get_8 (abfd
, buf
);
19532 result
|= ((LONGEST
) (byte
& 127) << shift
);
19534 if ((byte
& 128) == 0)
19539 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
19540 result
|= -(((LONGEST
) 1) << shift
);
19541 *bytes_read_ptr
= num_read
;
19545 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19546 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
19547 ADDR_SIZE is the size of addresses from the CU header. */
19550 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19551 unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
19553 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19554 bfd
*abfd
= objfile
->obfd
;
19555 const gdb_byte
*info_ptr
;
19557 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
19558 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19559 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19560 objfile_name (objfile
));
19561 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
19562 error (_("DW_FORM_addr_index pointing outside of "
19563 ".debug_addr section [in module %s]"),
19564 objfile_name (objfile
));
19565 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19566 + addr_base
+ addr_index
* addr_size
);
19567 if (addr_size
== 4)
19568 return bfd_get_32 (abfd
, info_ptr
);
19570 return bfd_get_64 (abfd
, info_ptr
);
19573 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19576 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19578 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19579 cu
->addr_base
, cu
->header
.addr_size
);
19582 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19585 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19586 unsigned int *bytes_read
)
19588 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19589 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19591 return read_addr_index (cu
, addr_index
);
19594 /* Data structure to pass results from dwarf2_read_addr_index_reader
19595 back to dwarf2_read_addr_index. */
19597 struct dwarf2_read_addr_index_data
19599 ULONGEST addr_base
;
19603 /* die_reader_func for dwarf2_read_addr_index. */
19606 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
19607 const gdb_byte
*info_ptr
,
19608 struct die_info
*comp_unit_die
,
19612 struct dwarf2_cu
*cu
= reader
->cu
;
19613 struct dwarf2_read_addr_index_data
*aidata
=
19614 (struct dwarf2_read_addr_index_data
*) data
;
19616 aidata
->addr_base
= cu
->addr_base
;
19617 aidata
->addr_size
= cu
->header
.addr_size
;
19620 /* Given an index in .debug_addr, fetch the value.
19621 NOTE: This can be called during dwarf expression evaluation,
19622 long after the debug information has been read, and thus per_cu->cu
19623 may no longer exist. */
19626 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
19627 unsigned int addr_index
)
19629 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19630 struct dwarf2_cu
*cu
= per_cu
->cu
;
19631 ULONGEST addr_base
;
19634 /* We need addr_base and addr_size.
19635 If we don't have PER_CU->cu, we have to get it.
19636 Nasty, but the alternative is storing the needed info in PER_CU,
19637 which at this point doesn't seem justified: it's not clear how frequently
19638 it would get used and it would increase the size of every PER_CU.
19639 Entry points like dwarf2_per_cu_addr_size do a similar thing
19640 so we're not in uncharted territory here.
19641 Alas we need to be a bit more complicated as addr_base is contained
19644 We don't need to read the entire CU(/TU).
19645 We just need the header and top level die.
19647 IWBN to use the aging mechanism to let us lazily later discard the CU.
19648 For now we skip this optimization. */
19652 addr_base
= cu
->addr_base
;
19653 addr_size
= cu
->header
.addr_size
;
19657 struct dwarf2_read_addr_index_data aidata
;
19659 /* Note: We can't use init_cutu_and_read_dies_simple here,
19660 we need addr_base. */
19661 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0, false,
19662 dwarf2_read_addr_index_reader
, &aidata
);
19663 addr_base
= aidata
.addr_base
;
19664 addr_size
= aidata
.addr_size
;
19667 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19671 /* Given a DW_FORM_GNU_str_index, fetch the string.
19672 This is only used by the Fission support. */
19674 static const char *
19675 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19677 struct dwarf2_cu
*cu
= reader
->cu
;
19678 struct dwarf2_per_objfile
*dwarf2_per_objfile
19679 = cu
->per_cu
->dwarf2_per_objfile
;
19680 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19681 const char *objf_name
= objfile_name (objfile
);
19682 bfd
*abfd
= objfile
->obfd
;
19683 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
19684 struct dwarf2_section_info
*str_offsets_section
=
19685 &reader
->dwo_file
->sections
.str_offsets
;
19686 const gdb_byte
*info_ptr
;
19687 ULONGEST str_offset
;
19688 static const char form_name
[] = "DW_FORM_GNU_str_index";
19690 dwarf2_read_section (objfile
, str_section
);
19691 dwarf2_read_section (objfile
, str_offsets_section
);
19692 if (str_section
->buffer
== NULL
)
19693 error (_("%s used without .debug_str.dwo section"
19694 " in CU at offset %s [in module %s]"),
19695 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19696 if (str_offsets_section
->buffer
== NULL
)
19697 error (_("%s used without .debug_str_offsets.dwo section"
19698 " in CU at offset %s [in module %s]"),
19699 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19700 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
19701 error (_("%s pointing outside of .debug_str_offsets.dwo"
19702 " section in CU at offset %s [in module %s]"),
19703 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19704 info_ptr
= (str_offsets_section
->buffer
19705 + str_index
* cu
->header
.offset_size
);
19706 if (cu
->header
.offset_size
== 4)
19707 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19709 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19710 if (str_offset
>= str_section
->size
)
19711 error (_("Offset from %s pointing outside of"
19712 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19713 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19714 return (const char *) (str_section
->buffer
+ str_offset
);
19717 /* Return the length of an LEB128 number in BUF. */
19720 leb128_size (const gdb_byte
*buf
)
19722 const gdb_byte
*begin
= buf
;
19728 if ((byte
& 128) == 0)
19729 return buf
- begin
;
19734 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19743 cu
->language
= language_c
;
19746 case DW_LANG_C_plus_plus
:
19747 case DW_LANG_C_plus_plus_11
:
19748 case DW_LANG_C_plus_plus_14
:
19749 cu
->language
= language_cplus
;
19752 cu
->language
= language_d
;
19754 case DW_LANG_Fortran77
:
19755 case DW_LANG_Fortran90
:
19756 case DW_LANG_Fortran95
:
19757 case DW_LANG_Fortran03
:
19758 case DW_LANG_Fortran08
:
19759 cu
->language
= language_fortran
;
19762 cu
->language
= language_go
;
19764 case DW_LANG_Mips_Assembler
:
19765 cu
->language
= language_asm
;
19767 case DW_LANG_Ada83
:
19768 case DW_LANG_Ada95
:
19769 cu
->language
= language_ada
;
19771 case DW_LANG_Modula2
:
19772 cu
->language
= language_m2
;
19774 case DW_LANG_Pascal83
:
19775 cu
->language
= language_pascal
;
19778 cu
->language
= language_objc
;
19781 case DW_LANG_Rust_old
:
19782 cu
->language
= language_rust
;
19784 case DW_LANG_Cobol74
:
19785 case DW_LANG_Cobol85
:
19787 cu
->language
= language_minimal
;
19790 cu
->language_defn
= language_def (cu
->language
);
19793 /* Return the named attribute or NULL if not there. */
19795 static struct attribute
*
19796 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19801 struct attribute
*spec
= NULL
;
19803 for (i
= 0; i
< die
->num_attrs
; ++i
)
19805 if (die
->attrs
[i
].name
== name
)
19806 return &die
->attrs
[i
];
19807 if (die
->attrs
[i
].name
== DW_AT_specification
19808 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19809 spec
= &die
->attrs
[i
];
19815 die
= follow_die_ref (die
, spec
, &cu
);
19821 /* Return the named attribute or NULL if not there,
19822 but do not follow DW_AT_specification, etc.
19823 This is for use in contexts where we're reading .debug_types dies.
19824 Following DW_AT_specification, DW_AT_abstract_origin will take us
19825 back up the chain, and we want to go down. */
19827 static struct attribute
*
19828 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
19832 for (i
= 0; i
< die
->num_attrs
; ++i
)
19833 if (die
->attrs
[i
].name
== name
)
19834 return &die
->attrs
[i
];
19839 /* Return the string associated with a string-typed attribute, or NULL if it
19840 is either not found or is of an incorrect type. */
19842 static const char *
19843 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19845 struct attribute
*attr
;
19846 const char *str
= NULL
;
19848 attr
= dwarf2_attr (die
, name
, cu
);
19852 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
19853 || attr
->form
== DW_FORM_string
19854 || attr
->form
== DW_FORM_GNU_str_index
19855 || attr
->form
== DW_FORM_GNU_strp_alt
)
19856 str
= DW_STRING (attr
);
19858 complaint (_("string type expected for attribute %s for "
19859 "DIE at %s in module %s"),
19860 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
19861 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
19867 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19868 and holds a non-zero value. This function should only be used for
19869 DW_FORM_flag or DW_FORM_flag_present attributes. */
19872 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19874 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19876 return (attr
&& DW_UNSND (attr
));
19880 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19882 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19883 which value is non-zero. However, we have to be careful with
19884 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19885 (via dwarf2_flag_true_p) follows this attribute. So we may
19886 end up accidently finding a declaration attribute that belongs
19887 to a different DIE referenced by the specification attribute,
19888 even though the given DIE does not have a declaration attribute. */
19889 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19890 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19893 /* Return the die giving the specification for DIE, if there is
19894 one. *SPEC_CU is the CU containing DIE on input, and the CU
19895 containing the return value on output. If there is no
19896 specification, but there is an abstract origin, that is
19899 static struct die_info
*
19900 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19902 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19905 if (spec_attr
== NULL
)
19906 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19908 if (spec_attr
== NULL
)
19911 return follow_die_ref (die
, spec_attr
, spec_cu
);
19914 /* Stub for free_line_header to match void * callback types. */
19917 free_line_header_voidp (void *arg
)
19919 struct line_header
*lh
= (struct line_header
*) arg
;
19925 line_header::add_include_dir (const char *include_dir
)
19927 if (dwarf_line_debug
>= 2)
19928 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
19929 include_dirs
.size () + 1, include_dir
);
19931 include_dirs
.push_back (include_dir
);
19935 line_header::add_file_name (const char *name
,
19937 unsigned int mod_time
,
19938 unsigned int length
)
19940 if (dwarf_line_debug
>= 2)
19941 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
19942 (unsigned) file_names
.size () + 1, name
);
19944 file_names
.emplace_back (name
, d_index
, mod_time
, length
);
19947 /* A convenience function to find the proper .debug_line section for a CU. */
19949 static struct dwarf2_section_info
*
19950 get_debug_line_section (struct dwarf2_cu
*cu
)
19952 struct dwarf2_section_info
*section
;
19953 struct dwarf2_per_objfile
*dwarf2_per_objfile
19954 = cu
->per_cu
->dwarf2_per_objfile
;
19956 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
19958 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19959 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
19960 else if (cu
->per_cu
->is_dwz
)
19962 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19964 section
= &dwz
->line
;
19967 section
= &dwarf2_per_objfile
->line
;
19972 /* Read directory or file name entry format, starting with byte of
19973 format count entries, ULEB128 pairs of entry formats, ULEB128 of
19974 entries count and the entries themselves in the described entry
19978 read_formatted_entries (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19979 bfd
*abfd
, const gdb_byte
**bufp
,
19980 struct line_header
*lh
,
19981 const struct comp_unit_head
*cu_header
,
19982 void (*callback
) (struct line_header
*lh
,
19985 unsigned int mod_time
,
19986 unsigned int length
))
19988 gdb_byte format_count
, formati
;
19989 ULONGEST data_count
, datai
;
19990 const gdb_byte
*buf
= *bufp
;
19991 const gdb_byte
*format_header_data
;
19992 unsigned int bytes_read
;
19994 format_count
= read_1_byte (abfd
, buf
);
19996 format_header_data
= buf
;
19997 for (formati
= 0; formati
< format_count
; formati
++)
19999 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20001 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20005 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20007 for (datai
= 0; datai
< data_count
; datai
++)
20009 const gdb_byte
*format
= format_header_data
;
20010 struct file_entry fe
;
20012 for (formati
= 0; formati
< format_count
; formati
++)
20014 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20015 format
+= bytes_read
;
20017 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20018 format
+= bytes_read
;
20020 gdb::optional
<const char *> string
;
20021 gdb::optional
<unsigned int> uint
;
20025 case DW_FORM_string
:
20026 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
20030 case DW_FORM_line_strp
:
20031 string
.emplace (read_indirect_line_string (dwarf2_per_objfile
,
20038 case DW_FORM_data1
:
20039 uint
.emplace (read_1_byte (abfd
, buf
));
20043 case DW_FORM_data2
:
20044 uint
.emplace (read_2_bytes (abfd
, buf
));
20048 case DW_FORM_data4
:
20049 uint
.emplace (read_4_bytes (abfd
, buf
));
20053 case DW_FORM_data8
:
20054 uint
.emplace (read_8_bytes (abfd
, buf
));
20058 case DW_FORM_udata
:
20059 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
20063 case DW_FORM_block
:
20064 /* It is valid only for DW_LNCT_timestamp which is ignored by
20069 switch (content_type
)
20072 if (string
.has_value ())
20075 case DW_LNCT_directory_index
:
20076 if (uint
.has_value ())
20077 fe
.d_index
= (dir_index
) *uint
;
20079 case DW_LNCT_timestamp
:
20080 if (uint
.has_value ())
20081 fe
.mod_time
= *uint
;
20084 if (uint
.has_value ())
20090 complaint (_("Unknown format content type %s"),
20091 pulongest (content_type
));
20095 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
20101 /* Read the statement program header starting at OFFSET in
20102 .debug_line, or .debug_line.dwo. Return a pointer
20103 to a struct line_header, allocated using xmalloc.
20104 Returns NULL if there is a problem reading the header, e.g., if it
20105 has a version we don't understand.
20107 NOTE: the strings in the include directory and file name tables of
20108 the returned object point into the dwarf line section buffer,
20109 and must not be freed. */
20111 static line_header_up
20112 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
20114 const gdb_byte
*line_ptr
;
20115 unsigned int bytes_read
, offset_size
;
20117 const char *cur_dir
, *cur_file
;
20118 struct dwarf2_section_info
*section
;
20120 struct dwarf2_per_objfile
*dwarf2_per_objfile
20121 = cu
->per_cu
->dwarf2_per_objfile
;
20123 section
= get_debug_line_section (cu
);
20124 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
20125 if (section
->buffer
== NULL
)
20127 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20128 complaint (_("missing .debug_line.dwo section"));
20130 complaint (_("missing .debug_line section"));
20134 /* We can't do this until we know the section is non-empty.
20135 Only then do we know we have such a section. */
20136 abfd
= get_section_bfd_owner (section
);
20138 /* Make sure that at least there's room for the total_length field.
20139 That could be 12 bytes long, but we're just going to fudge that. */
20140 if (to_underlying (sect_off
) + 4 >= section
->size
)
20142 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20146 line_header_up
lh (new line_header ());
20148 lh
->sect_off
= sect_off
;
20149 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
20151 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
20153 /* Read in the header. */
20155 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
20156 &bytes_read
, &offset_size
);
20157 line_ptr
+= bytes_read
;
20158 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
20160 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20163 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
20164 lh
->version
= read_2_bytes (abfd
, line_ptr
);
20166 if (lh
->version
> 5)
20168 /* This is a version we don't understand. The format could have
20169 changed in ways we don't handle properly so just punt. */
20170 complaint (_("unsupported version in .debug_line section"));
20173 if (lh
->version
>= 5)
20175 gdb_byte segment_selector_size
;
20177 /* Skip address size. */
20178 read_1_byte (abfd
, line_ptr
);
20181 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
20183 if (segment_selector_size
!= 0)
20185 complaint (_("unsupported segment selector size %u "
20186 "in .debug_line section"),
20187 segment_selector_size
);
20191 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
20192 line_ptr
+= offset_size
;
20193 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
20195 if (lh
->version
>= 4)
20197 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
20201 lh
->maximum_ops_per_instruction
= 1;
20203 if (lh
->maximum_ops_per_instruction
== 0)
20205 lh
->maximum_ops_per_instruction
= 1;
20206 complaint (_("invalid maximum_ops_per_instruction "
20207 "in `.debug_line' section"));
20210 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
20212 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
20214 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
20216 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
20218 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
20220 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
20221 for (i
= 1; i
< lh
->opcode_base
; ++i
)
20223 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
20227 if (lh
->version
>= 5)
20229 /* Read directory table. */
20230 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20232 [] (struct line_header
*lh
, const char *name
,
20233 dir_index d_index
, unsigned int mod_time
,
20234 unsigned int length
)
20236 lh
->add_include_dir (name
);
20239 /* Read file name table. */
20240 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20242 [] (struct line_header
*lh
, const char *name
,
20243 dir_index d_index
, unsigned int mod_time
,
20244 unsigned int length
)
20246 lh
->add_file_name (name
, d_index
, mod_time
, length
);
20251 /* Read directory table. */
20252 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20254 line_ptr
+= bytes_read
;
20255 lh
->add_include_dir (cur_dir
);
20257 line_ptr
+= bytes_read
;
20259 /* Read file name table. */
20260 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20262 unsigned int mod_time
, length
;
20265 line_ptr
+= bytes_read
;
20266 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20267 line_ptr
+= bytes_read
;
20268 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20269 line_ptr
+= bytes_read
;
20270 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20271 line_ptr
+= bytes_read
;
20273 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
20275 line_ptr
+= bytes_read
;
20277 lh
->statement_program_start
= line_ptr
;
20279 if (line_ptr
> (section
->buffer
+ section
->size
))
20280 complaint (_("line number info header doesn't "
20281 "fit in `.debug_line' section"));
20286 /* Subroutine of dwarf_decode_lines to simplify it.
20287 Return the file name of the psymtab for included file FILE_INDEX
20288 in line header LH of PST.
20289 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20290 If space for the result is malloc'd, *NAME_HOLDER will be set.
20291 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
20293 static const char *
20294 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
20295 const struct partial_symtab
*pst
,
20296 const char *comp_dir
,
20297 gdb::unique_xmalloc_ptr
<char> *name_holder
)
20299 const file_entry
&fe
= lh
->file_names
[file_index
];
20300 const char *include_name
= fe
.name
;
20301 const char *include_name_to_compare
= include_name
;
20302 const char *pst_filename
;
20305 const char *dir_name
= fe
.include_dir (lh
);
20307 gdb::unique_xmalloc_ptr
<char> hold_compare
;
20308 if (!IS_ABSOLUTE_PATH (include_name
)
20309 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
20311 /* Avoid creating a duplicate psymtab for PST.
20312 We do this by comparing INCLUDE_NAME and PST_FILENAME.
20313 Before we do the comparison, however, we need to account
20314 for DIR_NAME and COMP_DIR.
20315 First prepend dir_name (if non-NULL). If we still don't
20316 have an absolute path prepend comp_dir (if non-NULL).
20317 However, the directory we record in the include-file's
20318 psymtab does not contain COMP_DIR (to match the
20319 corresponding symtab(s)).
20324 bash$ gcc -g ./hello.c
20325 include_name = "hello.c"
20327 DW_AT_comp_dir = comp_dir = "/tmp"
20328 DW_AT_name = "./hello.c"
20332 if (dir_name
!= NULL
)
20334 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
20335 include_name
, (char *) NULL
));
20336 include_name
= name_holder
->get ();
20337 include_name_to_compare
= include_name
;
20339 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
20341 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
20342 include_name
, (char *) NULL
));
20343 include_name_to_compare
= hold_compare
.get ();
20347 pst_filename
= pst
->filename
;
20348 gdb::unique_xmalloc_ptr
<char> copied_name
;
20349 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
20351 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
20352 pst_filename
, (char *) NULL
));
20353 pst_filename
= copied_name
.get ();
20356 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
20360 return include_name
;
20363 /* State machine to track the state of the line number program. */
20365 class lnp_state_machine
20368 /* Initialize a machine state for the start of a line number
20370 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
20371 bool record_lines_p
);
20373 file_entry
*current_file ()
20375 /* lh->file_names is 0-based, but the file name numbers in the
20376 statement program are 1-based. */
20377 return m_line_header
->file_name_at (m_file
);
20380 /* Record the line in the state machine. END_SEQUENCE is true if
20381 we're processing the end of a sequence. */
20382 void record_line (bool end_sequence
);
20384 /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true
20385 nop-out rest of the lines in this sequence. */
20386 void check_line_address (struct dwarf2_cu
*cu
,
20387 const gdb_byte
*line_ptr
,
20388 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
20390 void handle_set_discriminator (unsigned int discriminator
)
20392 m_discriminator
= discriminator
;
20393 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
20396 /* Handle DW_LNE_set_address. */
20397 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
20400 address
+= baseaddr
;
20401 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
20404 /* Handle DW_LNS_advance_pc. */
20405 void handle_advance_pc (CORE_ADDR adjust
);
20407 /* Handle a special opcode. */
20408 void handle_special_opcode (unsigned char op_code
);
20410 /* Handle DW_LNS_advance_line. */
20411 void handle_advance_line (int line_delta
)
20413 advance_line (line_delta
);
20416 /* Handle DW_LNS_set_file. */
20417 void handle_set_file (file_name_index file
);
20419 /* Handle DW_LNS_negate_stmt. */
20420 void handle_negate_stmt ()
20422 m_is_stmt
= !m_is_stmt
;
20425 /* Handle DW_LNS_const_add_pc. */
20426 void handle_const_add_pc ();
20428 /* Handle DW_LNS_fixed_advance_pc. */
20429 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
20431 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20435 /* Handle DW_LNS_copy. */
20436 void handle_copy ()
20438 record_line (false);
20439 m_discriminator
= 0;
20442 /* Handle DW_LNE_end_sequence. */
20443 void handle_end_sequence ()
20445 m_currently_recording_lines
= true;
20449 /* Advance the line by LINE_DELTA. */
20450 void advance_line (int line_delta
)
20452 m_line
+= line_delta
;
20454 if (line_delta
!= 0)
20455 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20458 struct dwarf2_cu
*m_cu
;
20460 gdbarch
*m_gdbarch
;
20462 /* True if we're recording lines.
20463 Otherwise we're building partial symtabs and are just interested in
20464 finding include files mentioned by the line number program. */
20465 bool m_record_lines_p
;
20467 /* The line number header. */
20468 line_header
*m_line_header
;
20470 /* These are part of the standard DWARF line number state machine,
20471 and initialized according to the DWARF spec. */
20473 unsigned char m_op_index
= 0;
20474 /* The line table index (1-based) of the current file. */
20475 file_name_index m_file
= (file_name_index
) 1;
20476 unsigned int m_line
= 1;
20478 /* These are initialized in the constructor. */
20480 CORE_ADDR m_address
;
20482 unsigned int m_discriminator
;
20484 /* Additional bits of state we need to track. */
20486 /* The last file that we called dwarf2_start_subfile for.
20487 This is only used for TLLs. */
20488 unsigned int m_last_file
= 0;
20489 /* The last file a line number was recorded for. */
20490 struct subfile
*m_last_subfile
= NULL
;
20492 /* When true, record the lines we decode. */
20493 bool m_currently_recording_lines
= false;
20495 /* The last line number that was recorded, used to coalesce
20496 consecutive entries for the same line. This can happen, for
20497 example, when discriminators are present. PR 17276. */
20498 unsigned int m_last_line
= 0;
20499 bool m_line_has_non_zero_discriminator
= false;
20503 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
20505 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
20506 / m_line_header
->maximum_ops_per_instruction
)
20507 * m_line_header
->minimum_instruction_length
);
20508 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20509 m_op_index
= ((m_op_index
+ adjust
)
20510 % m_line_header
->maximum_ops_per_instruction
);
20514 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
20516 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
20517 CORE_ADDR addr_adj
= (((m_op_index
20518 + (adj_opcode
/ m_line_header
->line_range
))
20519 / m_line_header
->maximum_ops_per_instruction
)
20520 * m_line_header
->minimum_instruction_length
);
20521 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20522 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
20523 % m_line_header
->maximum_ops_per_instruction
);
20525 int line_delta
= (m_line_header
->line_base
20526 + (adj_opcode
% m_line_header
->line_range
));
20527 advance_line (line_delta
);
20528 record_line (false);
20529 m_discriminator
= 0;
20533 lnp_state_machine::handle_set_file (file_name_index file
)
20537 const file_entry
*fe
= current_file ();
20539 dwarf2_debug_line_missing_file_complaint ();
20540 else if (m_record_lines_p
)
20542 const char *dir
= fe
->include_dir (m_line_header
);
20544 m_last_subfile
= m_cu
->builder
->get_current_subfile ();
20545 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20546 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
20551 lnp_state_machine::handle_const_add_pc ()
20554 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
20557 = (((m_op_index
+ adjust
)
20558 / m_line_header
->maximum_ops_per_instruction
)
20559 * m_line_header
->minimum_instruction_length
);
20561 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20562 m_op_index
= ((m_op_index
+ adjust
)
20563 % m_line_header
->maximum_ops_per_instruction
);
20566 /* Return non-zero if we should add LINE to the line number table.
20567 LINE is the line to add, LAST_LINE is the last line that was added,
20568 LAST_SUBFILE is the subfile for LAST_LINE.
20569 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
20570 had a non-zero discriminator.
20572 We have to be careful in the presence of discriminators.
20573 E.g., for this line:
20575 for (i = 0; i < 100000; i++);
20577 clang can emit four line number entries for that one line,
20578 each with a different discriminator.
20579 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20581 However, we want gdb to coalesce all four entries into one.
20582 Otherwise the user could stepi into the middle of the line and
20583 gdb would get confused about whether the pc really was in the
20584 middle of the line.
20586 Things are further complicated by the fact that two consecutive
20587 line number entries for the same line is a heuristic used by gcc
20588 to denote the end of the prologue. So we can't just discard duplicate
20589 entries, we have to be selective about it. The heuristic we use is
20590 that we only collapse consecutive entries for the same line if at least
20591 one of those entries has a non-zero discriminator. PR 17276.
20593 Note: Addresses in the line number state machine can never go backwards
20594 within one sequence, thus this coalescing is ok. */
20597 dwarf_record_line_p (struct dwarf2_cu
*cu
,
20598 unsigned int line
, unsigned int last_line
,
20599 int line_has_non_zero_discriminator
,
20600 struct subfile
*last_subfile
)
20602 if (cu
->builder
->get_current_subfile () != last_subfile
)
20604 if (line
!= last_line
)
20606 /* Same line for the same file that we've seen already.
20607 As a last check, for pr 17276, only record the line if the line
20608 has never had a non-zero discriminator. */
20609 if (!line_has_non_zero_discriminator
)
20614 /* Use the CU's builder to record line number LINE beginning at
20615 address ADDRESS in the line table of subfile SUBFILE. */
20618 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20619 unsigned int line
, CORE_ADDR address
,
20620 struct dwarf2_cu
*cu
)
20622 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20624 if (dwarf_line_debug
)
20626 fprintf_unfiltered (gdb_stdlog
,
20627 "Recording line %u, file %s, address %s\n",
20628 line
, lbasename (subfile
->name
),
20629 paddress (gdbarch
, address
));
20633 cu
->builder
->record_line (subfile
, line
, addr
);
20636 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20637 Mark the end of a set of line number records.
20638 The arguments are the same as for dwarf_record_line_1.
20639 If SUBFILE is NULL the request is ignored. */
20642 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20643 CORE_ADDR address
, struct dwarf2_cu
*cu
)
20645 if (subfile
== NULL
)
20648 if (dwarf_line_debug
)
20650 fprintf_unfiltered (gdb_stdlog
,
20651 "Finishing current line, file %s, address %s\n",
20652 lbasename (subfile
->name
),
20653 paddress (gdbarch
, address
));
20656 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, cu
);
20660 lnp_state_machine::record_line (bool end_sequence
)
20662 if (dwarf_line_debug
)
20664 fprintf_unfiltered (gdb_stdlog
,
20665 "Processing actual line %u: file %u,"
20666 " address %s, is_stmt %u, discrim %u\n",
20667 m_line
, to_underlying (m_file
),
20668 paddress (m_gdbarch
, m_address
),
20669 m_is_stmt
, m_discriminator
);
20672 file_entry
*fe
= current_file ();
20675 dwarf2_debug_line_missing_file_complaint ();
20676 /* For now we ignore lines not starting on an instruction boundary.
20677 But not when processing end_sequence for compatibility with the
20678 previous version of the code. */
20679 else if (m_op_index
== 0 || end_sequence
)
20681 fe
->included_p
= 1;
20682 if (m_record_lines_p
&& m_is_stmt
)
20684 if (m_last_subfile
!= m_cu
->builder
->get_current_subfile ()
20687 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
20688 m_currently_recording_lines
? m_cu
: nullptr);
20693 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
20694 m_line_has_non_zero_discriminator
,
20697 dwarf_record_line_1 (m_gdbarch
,
20698 m_cu
->builder
->get_current_subfile (),
20700 m_currently_recording_lines
? m_cu
: nullptr);
20702 m_last_subfile
= m_cu
->builder
->get_current_subfile ();
20703 m_last_line
= m_line
;
20709 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
20710 line_header
*lh
, bool record_lines_p
)
20714 m_record_lines_p
= record_lines_p
;
20715 m_line_header
= lh
;
20717 m_currently_recording_lines
= true;
20719 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20720 was a line entry for it so that the backend has a chance to adjust it
20721 and also record it in case it needs it. This is currently used by MIPS
20722 code, cf. `mips_adjust_dwarf2_line'. */
20723 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20724 m_is_stmt
= lh
->default_is_stmt
;
20725 m_discriminator
= 0;
20729 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20730 const gdb_byte
*line_ptr
,
20731 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
20733 /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside
20734 the pc range of the CU. However, we restrict the test to only ADDRESS
20735 values of zero to preserve GDB's previous behaviour which is to handle
20736 the specific case of a function being GC'd by the linker. */
20738 if (address
== 0 && address
< unrelocated_lowpc
)
20740 /* This line table is for a function which has been
20741 GCd by the linker. Ignore it. PR gdb/12528 */
20743 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20744 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20746 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20747 line_offset
, objfile_name (objfile
));
20748 m_currently_recording_lines
= false;
20749 /* Note: m_currently_recording_lines is left as false until we see
20750 DW_LNE_end_sequence. */
20754 /* Subroutine of dwarf_decode_lines to simplify it.
20755 Process the line number information in LH.
20756 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20757 program in order to set included_p for every referenced header. */
20760 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20761 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20763 const gdb_byte
*line_ptr
, *extended_end
;
20764 const gdb_byte
*line_end
;
20765 unsigned int bytes_read
, extended_len
;
20766 unsigned char op_code
, extended_op
;
20767 CORE_ADDR baseaddr
;
20768 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20769 bfd
*abfd
= objfile
->obfd
;
20770 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
20771 /* True if we're recording line info (as opposed to building partial
20772 symtabs and just interested in finding include files mentioned by
20773 the line number program). */
20774 bool record_lines_p
= !decode_for_pst_p
;
20776 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
20778 line_ptr
= lh
->statement_program_start
;
20779 line_end
= lh
->statement_program_end
;
20781 /* Read the statement sequences until there's nothing left. */
20782 while (line_ptr
< line_end
)
20784 /* The DWARF line number program state machine. Reset the state
20785 machine at the start of each sequence. */
20786 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
20787 bool end_sequence
= false;
20789 if (record_lines_p
)
20791 /* Start a subfile for the current file of the state
20793 const file_entry
*fe
= state_machine
.current_file ();
20796 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
20799 /* Decode the table. */
20800 while (line_ptr
< line_end
&& !end_sequence
)
20802 op_code
= read_1_byte (abfd
, line_ptr
);
20805 if (op_code
>= lh
->opcode_base
)
20807 /* Special opcode. */
20808 state_machine
.handle_special_opcode (op_code
);
20810 else switch (op_code
)
20812 case DW_LNS_extended_op
:
20813 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
20815 line_ptr
+= bytes_read
;
20816 extended_end
= line_ptr
+ extended_len
;
20817 extended_op
= read_1_byte (abfd
, line_ptr
);
20819 switch (extended_op
)
20821 case DW_LNE_end_sequence
:
20822 state_machine
.handle_end_sequence ();
20823 end_sequence
= true;
20825 case DW_LNE_set_address
:
20828 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
20829 line_ptr
+= bytes_read
;
20831 state_machine
.check_line_address (cu
, line_ptr
,
20832 lowpc
- baseaddr
, address
);
20833 state_machine
.handle_set_address (baseaddr
, address
);
20836 case DW_LNE_define_file
:
20838 const char *cur_file
;
20839 unsigned int mod_time
, length
;
20842 cur_file
= read_direct_string (abfd
, line_ptr
,
20844 line_ptr
+= bytes_read
;
20845 dindex
= (dir_index
)
20846 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20847 line_ptr
+= bytes_read
;
20849 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20850 line_ptr
+= bytes_read
;
20852 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20853 line_ptr
+= bytes_read
;
20854 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
20857 case DW_LNE_set_discriminator
:
20859 /* The discriminator is not interesting to the
20860 debugger; just ignore it. We still need to
20861 check its value though:
20862 if there are consecutive entries for the same
20863 (non-prologue) line we want to coalesce them.
20866 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20867 line_ptr
+= bytes_read
;
20869 state_machine
.handle_set_discriminator (discr
);
20873 complaint (_("mangled .debug_line section"));
20876 /* Make sure that we parsed the extended op correctly. If e.g.
20877 we expected a different address size than the producer used,
20878 we may have read the wrong number of bytes. */
20879 if (line_ptr
!= extended_end
)
20881 complaint (_("mangled .debug_line section"));
20886 state_machine
.handle_copy ();
20888 case DW_LNS_advance_pc
:
20891 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20892 line_ptr
+= bytes_read
;
20894 state_machine
.handle_advance_pc (adjust
);
20897 case DW_LNS_advance_line
:
20900 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
20901 line_ptr
+= bytes_read
;
20903 state_machine
.handle_advance_line (line_delta
);
20906 case DW_LNS_set_file
:
20908 file_name_index file
20909 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
20911 line_ptr
+= bytes_read
;
20913 state_machine
.handle_set_file (file
);
20916 case DW_LNS_set_column
:
20917 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20918 line_ptr
+= bytes_read
;
20920 case DW_LNS_negate_stmt
:
20921 state_machine
.handle_negate_stmt ();
20923 case DW_LNS_set_basic_block
:
20925 /* Add to the address register of the state machine the
20926 address increment value corresponding to special opcode
20927 255. I.e., this value is scaled by the minimum
20928 instruction length since special opcode 255 would have
20929 scaled the increment. */
20930 case DW_LNS_const_add_pc
:
20931 state_machine
.handle_const_add_pc ();
20933 case DW_LNS_fixed_advance_pc
:
20935 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
20938 state_machine
.handle_fixed_advance_pc (addr_adj
);
20943 /* Unknown standard opcode, ignore it. */
20946 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
20948 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20949 line_ptr
+= bytes_read
;
20956 dwarf2_debug_line_missing_end_sequence_complaint ();
20958 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
20959 in which case we still finish recording the last line). */
20960 state_machine
.record_line (true);
20964 /* Decode the Line Number Program (LNP) for the given line_header
20965 structure and CU. The actual information extracted and the type
20966 of structures created from the LNP depends on the value of PST.
20968 1. If PST is NULL, then this procedure uses the data from the program
20969 to create all necessary symbol tables, and their linetables.
20971 2. If PST is not NULL, this procedure reads the program to determine
20972 the list of files included by the unit represented by PST, and
20973 builds all the associated partial symbol tables.
20975 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20976 It is used for relative paths in the line table.
20977 NOTE: When processing partial symtabs (pst != NULL),
20978 comp_dir == pst->dirname.
20980 NOTE: It is important that psymtabs have the same file name (via strcmp)
20981 as the corresponding symtab. Since COMP_DIR is not used in the name of the
20982 symtab we don't use it in the name of the psymtabs we create.
20983 E.g. expand_line_sal requires this when finding psymtabs to expand.
20984 A good testcase for this is mb-inline.exp.
20986 LOWPC is the lowest address in CU (or 0 if not known).
20988 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
20989 for its PC<->lines mapping information. Otherwise only the filename
20990 table is read in. */
20993 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
20994 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
20995 CORE_ADDR lowpc
, int decode_mapping
)
20997 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20998 const int decode_for_pst_p
= (pst
!= NULL
);
21000 if (decode_mapping
)
21001 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
21003 if (decode_for_pst_p
)
21007 /* Now that we're done scanning the Line Header Program, we can
21008 create the psymtab of each included file. */
21009 for (file_index
= 0; file_index
< lh
->file_names
.size (); file_index
++)
21010 if (lh
->file_names
[file_index
].included_p
== 1)
21012 gdb::unique_xmalloc_ptr
<char> name_holder
;
21013 const char *include_name
=
21014 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
,
21016 if (include_name
!= NULL
)
21017 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
21022 /* Make sure a symtab is created for every file, even files
21023 which contain only variables (i.e. no code with associated
21025 struct compunit_symtab
*cust
= cu
->builder
->get_compunit_symtab ();
21028 for (i
= 0; i
< lh
->file_names
.size (); i
++)
21030 file_entry
&fe
= lh
->file_names
[i
];
21032 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
21034 if (cu
->builder
->get_current_subfile ()->symtab
== NULL
)
21036 cu
->builder
->get_current_subfile ()->symtab
21037 = allocate_symtab (cust
,
21038 cu
->builder
->get_current_subfile ()->name
);
21040 fe
.symtab
= cu
->builder
->get_current_subfile ()->symtab
;
21045 /* Start a subfile for DWARF. FILENAME is the name of the file and
21046 DIRNAME the name of the source directory which contains FILENAME
21047 or NULL if not known.
21048 This routine tries to keep line numbers from identical absolute and
21049 relative file names in a common subfile.
21051 Using the `list' example from the GDB testsuite, which resides in
21052 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
21053 of /srcdir/list0.c yields the following debugging information for list0.c:
21055 DW_AT_name: /srcdir/list0.c
21056 DW_AT_comp_dir: /compdir
21057 files.files[0].name: list0.h
21058 files.files[0].dir: /srcdir
21059 files.files[1].name: list0.c
21060 files.files[1].dir: /srcdir
21062 The line number information for list0.c has to end up in a single
21063 subfile, so that `break /srcdir/list0.c:1' works as expected.
21064 start_subfile will ensure that this happens provided that we pass the
21065 concatenation of files.files[1].dir and files.files[1].name as the
21069 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
21070 const char *dirname
)
21074 /* In order not to lose the line information directory,
21075 we concatenate it to the filename when it makes sense.
21076 Note that the Dwarf3 standard says (speaking of filenames in line
21077 information): ``The directory index is ignored for file names
21078 that represent full path names''. Thus ignoring dirname in the
21079 `else' branch below isn't an issue. */
21081 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
21083 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
21087 cu
->builder
->start_subfile (filename
);
21093 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
21094 buildsym_compunit constructor. */
21096 static struct compunit_symtab
*
21097 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
21098 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
21100 gdb_assert (cu
->builder
== nullptr);
21102 cu
->builder
.reset (new struct buildsym_compunit
21103 (cu
->per_cu
->dwarf2_per_objfile
->objfile
,
21104 name
, comp_dir
, cu
->language
, low_pc
));
21106 cu
->list_in_scope
= cu
->builder
->get_file_symbols ();
21108 cu
->builder
->record_debugformat ("DWARF 2");
21109 cu
->builder
->record_producer (cu
->producer
);
21111 cu
->processing_has_namespace_info
= 0;
21113 return cu
->builder
->get_compunit_symtab ();
21117 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
21118 struct dwarf2_cu
*cu
)
21120 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21121 struct comp_unit_head
*cu_header
= &cu
->header
;
21123 /* NOTE drow/2003-01-30: There used to be a comment and some special
21124 code here to turn a symbol with DW_AT_external and a
21125 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
21126 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
21127 with some versions of binutils) where shared libraries could have
21128 relocations against symbols in their debug information - the
21129 minimal symbol would have the right address, but the debug info
21130 would not. It's no longer necessary, because we will explicitly
21131 apply relocations when we read in the debug information now. */
21133 /* A DW_AT_location attribute with no contents indicates that a
21134 variable has been optimized away. */
21135 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
21137 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21141 /* Handle one degenerate form of location expression specially, to
21142 preserve GDB's previous behavior when section offsets are
21143 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
21144 then mark this symbol as LOC_STATIC. */
21146 if (attr_form_is_block (attr
)
21147 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
21148 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
21149 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
21150 && (DW_BLOCK (attr
)->size
21151 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
21153 unsigned int dummy
;
21155 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
21156 SYMBOL_VALUE_ADDRESS (sym
) =
21157 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
21159 SYMBOL_VALUE_ADDRESS (sym
) =
21160 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
21161 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
21162 fixup_symbol_section (sym
, objfile
);
21163 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
21164 SYMBOL_SECTION (sym
));
21168 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
21169 expression evaluator, and use LOC_COMPUTED only when necessary
21170 (i.e. when the value of a register or memory location is
21171 referenced, or a thread-local block, etc.). Then again, it might
21172 not be worthwhile. I'm assuming that it isn't unless performance
21173 or memory numbers show me otherwise. */
21175 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
21177 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
21178 cu
->has_loclist
= 1;
21181 /* Given a pointer to a DWARF information entry, figure out if we need
21182 to make a symbol table entry for it, and if so, create a new entry
21183 and return a pointer to it.
21184 If TYPE is NULL, determine symbol type from the die, otherwise
21185 used the passed type.
21186 If SPACE is not NULL, use it to hold the new symbol. If it is
21187 NULL, allocate a new symbol on the objfile's obstack. */
21189 static struct symbol
*
21190 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
21191 struct symbol
*space
)
21193 struct dwarf2_per_objfile
*dwarf2_per_objfile
21194 = cu
->per_cu
->dwarf2_per_objfile
;
21195 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21196 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21197 struct symbol
*sym
= NULL
;
21199 struct attribute
*attr
= NULL
;
21200 struct attribute
*attr2
= NULL
;
21201 CORE_ADDR baseaddr
;
21202 struct pending
**list_to_add
= NULL
;
21204 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
21206 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21208 name
= dwarf2_name (die
, cu
);
21211 const char *linkagename
;
21212 int suppress_add
= 0;
21217 sym
= allocate_symbol (objfile
);
21218 OBJSTAT (objfile
, n_syms
++);
21220 /* Cache this symbol's name and the name's demangled form (if any). */
21221 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
21222 linkagename
= dwarf2_physname (name
, die
, cu
);
21223 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
21225 /* Fortran does not have mangling standard and the mangling does differ
21226 between gfortran, iFort etc. */
21227 if (cu
->language
== language_fortran
21228 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
21229 symbol_set_demangled_name (&(sym
->ginfo
),
21230 dwarf2_full_name (name
, die
, cu
),
21233 /* Default assumptions.
21234 Use the passed type or decode it from the die. */
21235 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21236 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21238 SYMBOL_TYPE (sym
) = type
;
21240 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
21241 attr
= dwarf2_attr (die
,
21242 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
21246 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
21249 attr
= dwarf2_attr (die
,
21250 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
21254 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
21255 struct file_entry
*fe
;
21257 if (cu
->line_header
!= NULL
)
21258 fe
= cu
->line_header
->file_name_at (file_index
);
21263 complaint (_("file index out of range"));
21265 symbol_set_symtab (sym
, fe
->symtab
);
21271 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
21276 addr
= attr_value_as_address (attr
);
21277 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
21278 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
21280 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
21281 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
21282 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
21283 dw2_add_symbol_to_list (sym
, cu
->list_in_scope
);
21285 case DW_TAG_subprogram
:
21286 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21288 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21289 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21290 if ((attr2
&& (DW_UNSND (attr2
) != 0))
21291 || cu
->language
== language_ada
)
21293 /* Subprograms marked external are stored as a global symbol.
21294 Ada subprograms, whether marked external or not, are always
21295 stored as a global symbol, because we want to be able to
21296 access them globally. For instance, we want to be able
21297 to break on a nested subprogram without having to
21298 specify the context. */
21299 list_to_add
= cu
->builder
->get_global_symbols ();
21303 list_to_add
= cu
->list_in_scope
;
21306 case DW_TAG_inlined_subroutine
:
21307 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21309 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21310 SYMBOL_INLINED (sym
) = 1;
21311 list_to_add
= cu
->list_in_scope
;
21313 case DW_TAG_template_value_param
:
21315 /* Fall through. */
21316 case DW_TAG_constant
:
21317 case DW_TAG_variable
:
21318 case DW_TAG_member
:
21319 /* Compilation with minimal debug info may result in
21320 variables with missing type entries. Change the
21321 misleading `void' type to something sensible. */
21322 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
21323 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
21325 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21326 /* In the case of DW_TAG_member, we should only be called for
21327 static const members. */
21328 if (die
->tag
== DW_TAG_member
)
21330 /* dwarf2_add_field uses die_is_declaration,
21331 so we do the same. */
21332 gdb_assert (die_is_declaration (die
, cu
));
21337 dwarf2_const_value (attr
, sym
, cu
);
21338 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21341 if (attr2
&& (DW_UNSND (attr2
) != 0))
21342 list_to_add
= cu
->builder
->get_global_symbols ();
21344 list_to_add
= cu
->list_in_scope
;
21348 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21351 var_decode_location (attr
, sym
, cu
);
21352 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21354 /* Fortran explicitly imports any global symbols to the local
21355 scope by DW_TAG_common_block. */
21356 if (cu
->language
== language_fortran
&& die
->parent
21357 && die
->parent
->tag
== DW_TAG_common_block
)
21360 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21361 && SYMBOL_VALUE_ADDRESS (sym
) == 0
21362 && !dwarf2_per_objfile
->has_section_at_zero
)
21364 /* When a static variable is eliminated by the linker,
21365 the corresponding debug information is not stripped
21366 out, but the variable address is set to null;
21367 do not add such variables into symbol table. */
21369 else if (attr2
&& (DW_UNSND (attr2
) != 0))
21371 /* Workaround gfortran PR debug/40040 - it uses
21372 DW_AT_location for variables in -fPIC libraries which may
21373 get overriden by other libraries/executable and get
21374 a different address. Resolve it by the minimal symbol
21375 which may come from inferior's executable using copy
21376 relocation. Make this workaround only for gfortran as for
21377 other compilers GDB cannot guess the minimal symbol
21378 Fortran mangling kind. */
21379 if (cu
->language
== language_fortran
&& die
->parent
21380 && die
->parent
->tag
== DW_TAG_module
21382 && startswith (cu
->producer
, "GNU Fortran"))
21383 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21385 /* A variable with DW_AT_external is never static,
21386 but it may be block-scoped. */
21388 = (cu
->list_in_scope
== cu
->builder
->get_file_symbols ()
21389 ? cu
->builder
->get_global_symbols ()
21390 : cu
->list_in_scope
);
21393 list_to_add
= cu
->list_in_scope
;
21397 /* We do not know the address of this symbol.
21398 If it is an external symbol and we have type information
21399 for it, enter the symbol as a LOC_UNRESOLVED symbol.
21400 The address of the variable will then be determined from
21401 the minimal symbol table whenever the variable is
21403 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21405 /* Fortran explicitly imports any global symbols to the local
21406 scope by DW_TAG_common_block. */
21407 if (cu
->language
== language_fortran
&& die
->parent
21408 && die
->parent
->tag
== DW_TAG_common_block
)
21410 /* SYMBOL_CLASS doesn't matter here because
21411 read_common_block is going to reset it. */
21413 list_to_add
= cu
->list_in_scope
;
21415 else if (attr2
&& (DW_UNSND (attr2
) != 0)
21416 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
21418 /* A variable with DW_AT_external is never static, but it
21419 may be block-scoped. */
21421 = (cu
->list_in_scope
== cu
->builder
->get_file_symbols ()
21422 ? cu
->builder
->get_global_symbols ()
21423 : cu
->list_in_scope
);
21425 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21427 else if (!die_is_declaration (die
, cu
))
21429 /* Use the default LOC_OPTIMIZED_OUT class. */
21430 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
21432 list_to_add
= cu
->list_in_scope
;
21436 case DW_TAG_formal_parameter
:
21438 /* If we are inside a function, mark this as an argument. If
21439 not, we might be looking at an argument to an inlined function
21440 when we do not have enough information to show inlined frames;
21441 pretend it's a local variable in that case so that the user can
21443 struct context_stack
*curr
21444 = cu
->builder
->get_current_context_stack ();
21445 if (curr
!= nullptr && curr
->name
!= nullptr)
21446 SYMBOL_IS_ARGUMENT (sym
) = 1;
21447 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21450 var_decode_location (attr
, sym
, cu
);
21452 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21455 dwarf2_const_value (attr
, sym
, cu
);
21458 list_to_add
= cu
->list_in_scope
;
21461 case DW_TAG_unspecified_parameters
:
21462 /* From varargs functions; gdb doesn't seem to have any
21463 interest in this information, so just ignore it for now.
21466 case DW_TAG_template_type_param
:
21468 /* Fall through. */
21469 case DW_TAG_class_type
:
21470 case DW_TAG_interface_type
:
21471 case DW_TAG_structure_type
:
21472 case DW_TAG_union_type
:
21473 case DW_TAG_set_type
:
21474 case DW_TAG_enumeration_type
:
21475 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21476 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
21479 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
21480 really ever be static objects: otherwise, if you try
21481 to, say, break of a class's method and you're in a file
21482 which doesn't mention that class, it won't work unless
21483 the check for all static symbols in lookup_symbol_aux
21484 saves you. See the OtherFileClass tests in
21485 gdb.c++/namespace.exp. */
21490 = (cu
->list_in_scope
== cu
->builder
->get_file_symbols ()
21491 && cu
->language
== language_cplus
21492 ? cu
->builder
->get_global_symbols ()
21493 : cu
->list_in_scope
);
21495 /* The semantics of C++ state that "struct foo {
21496 ... }" also defines a typedef for "foo". */
21497 if (cu
->language
== language_cplus
21498 || cu
->language
== language_ada
21499 || cu
->language
== language_d
21500 || cu
->language
== language_rust
)
21502 /* The symbol's name is already allocated along
21503 with this objfile, so we don't need to
21504 duplicate it for the type. */
21505 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
21506 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
21511 case DW_TAG_typedef
:
21512 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21513 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21514 list_to_add
= cu
->list_in_scope
;
21516 case DW_TAG_base_type
:
21517 case DW_TAG_subrange_type
:
21518 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21519 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21520 list_to_add
= cu
->list_in_scope
;
21522 case DW_TAG_enumerator
:
21523 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21526 dwarf2_const_value (attr
, sym
, cu
);
21529 /* NOTE: carlton/2003-11-10: See comment above in the
21530 DW_TAG_class_type, etc. block. */
21533 = (cu
->list_in_scope
== cu
->builder
->get_file_symbols ()
21534 && cu
->language
== language_cplus
21535 ? cu
->builder
->get_global_symbols ()
21536 : cu
->list_in_scope
);
21539 case DW_TAG_imported_declaration
:
21540 case DW_TAG_namespace
:
21541 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21542 list_to_add
= cu
->builder
->get_global_symbols ();
21544 case DW_TAG_module
:
21545 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21546 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
21547 list_to_add
= cu
->builder
->get_global_symbols ();
21549 case DW_TAG_common_block
:
21550 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
21551 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
21552 dw2_add_symbol_to_list (sym
, cu
->list_in_scope
);
21555 /* Not a tag we recognize. Hopefully we aren't processing
21556 trash data, but since we must specifically ignore things
21557 we don't recognize, there is nothing else we should do at
21559 complaint (_("unsupported tag: '%s'"),
21560 dwarf_tag_name (die
->tag
));
21566 sym
->hash_next
= objfile
->template_symbols
;
21567 objfile
->template_symbols
= sym
;
21568 list_to_add
= NULL
;
21571 if (list_to_add
!= NULL
)
21572 dw2_add_symbol_to_list (sym
, list_to_add
);
21574 /* For the benefit of old versions of GCC, check for anonymous
21575 namespaces based on the demangled name. */
21576 if (!cu
->processing_has_namespace_info
21577 && cu
->language
== language_cplus
)
21578 cp_scan_for_anonymous_namespaces (cu
->builder
.get (), sym
, objfile
);
21583 /* Given an attr with a DW_FORM_dataN value in host byte order,
21584 zero-extend it as appropriate for the symbol's type. The DWARF
21585 standard (v4) is not entirely clear about the meaning of using
21586 DW_FORM_dataN for a constant with a signed type, where the type is
21587 wider than the data. The conclusion of a discussion on the DWARF
21588 list was that this is unspecified. We choose to always zero-extend
21589 because that is the interpretation long in use by GCC. */
21592 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21593 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21595 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21596 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21597 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21598 LONGEST l
= DW_UNSND (attr
);
21600 if (bits
< sizeof (*value
) * 8)
21602 l
&= ((LONGEST
) 1 << bits
) - 1;
21605 else if (bits
== sizeof (*value
) * 8)
21609 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21610 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21617 /* Read a constant value from an attribute. Either set *VALUE, or if
21618 the value does not fit in *VALUE, set *BYTES - either already
21619 allocated on the objfile obstack, or newly allocated on OBSTACK,
21620 or, set *BATON, if we translated the constant to a location
21624 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21625 const char *name
, struct obstack
*obstack
,
21626 struct dwarf2_cu
*cu
,
21627 LONGEST
*value
, const gdb_byte
**bytes
,
21628 struct dwarf2_locexpr_baton
**baton
)
21630 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21631 struct comp_unit_head
*cu_header
= &cu
->header
;
21632 struct dwarf_block
*blk
;
21633 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21634 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21640 switch (attr
->form
)
21643 case DW_FORM_GNU_addr_index
:
21647 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21648 dwarf2_const_value_length_mismatch_complaint (name
,
21649 cu_header
->addr_size
,
21650 TYPE_LENGTH (type
));
21651 /* Symbols of this form are reasonably rare, so we just
21652 piggyback on the existing location code rather than writing
21653 a new implementation of symbol_computed_ops. */
21654 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21655 (*baton
)->per_cu
= cu
->per_cu
;
21656 gdb_assert ((*baton
)->per_cu
);
21658 (*baton
)->size
= 2 + cu_header
->addr_size
;
21659 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21660 (*baton
)->data
= data
;
21662 data
[0] = DW_OP_addr
;
21663 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21664 byte_order
, DW_ADDR (attr
));
21665 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21668 case DW_FORM_string
:
21670 case DW_FORM_GNU_str_index
:
21671 case DW_FORM_GNU_strp_alt
:
21672 /* DW_STRING is already allocated on the objfile obstack, point
21674 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21676 case DW_FORM_block1
:
21677 case DW_FORM_block2
:
21678 case DW_FORM_block4
:
21679 case DW_FORM_block
:
21680 case DW_FORM_exprloc
:
21681 case DW_FORM_data16
:
21682 blk
= DW_BLOCK (attr
);
21683 if (TYPE_LENGTH (type
) != blk
->size
)
21684 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21685 TYPE_LENGTH (type
));
21686 *bytes
= blk
->data
;
21689 /* The DW_AT_const_value attributes are supposed to carry the
21690 symbol's value "represented as it would be on the target
21691 architecture." By the time we get here, it's already been
21692 converted to host endianness, so we just need to sign- or
21693 zero-extend it as appropriate. */
21694 case DW_FORM_data1
:
21695 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21697 case DW_FORM_data2
:
21698 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21700 case DW_FORM_data4
:
21701 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21703 case DW_FORM_data8
:
21704 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21707 case DW_FORM_sdata
:
21708 case DW_FORM_implicit_const
:
21709 *value
= DW_SND (attr
);
21712 case DW_FORM_udata
:
21713 *value
= DW_UNSND (attr
);
21717 complaint (_("unsupported const value attribute form: '%s'"),
21718 dwarf_form_name (attr
->form
));
21725 /* Copy constant value from an attribute to a symbol. */
21728 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21729 struct dwarf2_cu
*cu
)
21731 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21733 const gdb_byte
*bytes
;
21734 struct dwarf2_locexpr_baton
*baton
;
21736 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21737 SYMBOL_PRINT_NAME (sym
),
21738 &objfile
->objfile_obstack
, cu
,
21739 &value
, &bytes
, &baton
);
21743 SYMBOL_LOCATION_BATON (sym
) = baton
;
21744 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21746 else if (bytes
!= NULL
)
21748 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21749 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21753 SYMBOL_VALUE (sym
) = value
;
21754 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21758 /* Return the type of the die in question using its DW_AT_type attribute. */
21760 static struct type
*
21761 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21763 struct attribute
*type_attr
;
21765 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21768 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21769 /* A missing DW_AT_type represents a void type. */
21770 return objfile_type (objfile
)->builtin_void
;
21773 return lookup_die_type (die
, type_attr
, cu
);
21776 /* True iff CU's producer generates GNAT Ada auxiliary information
21777 that allows to find parallel types through that information instead
21778 of having to do expensive parallel lookups by type name. */
21781 need_gnat_info (struct dwarf2_cu
*cu
)
21783 /* Assume that the Ada compiler was GNAT, which always produces
21784 the auxiliary information. */
21785 return (cu
->language
== language_ada
);
21788 /* Return the auxiliary type of the die in question using its
21789 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
21790 attribute is not present. */
21792 static struct type
*
21793 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21795 struct attribute
*type_attr
;
21797 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
21801 return lookup_die_type (die
, type_attr
, cu
);
21804 /* If DIE has a descriptive_type attribute, then set the TYPE's
21805 descriptive type accordingly. */
21808 set_descriptive_type (struct type
*type
, struct die_info
*die
,
21809 struct dwarf2_cu
*cu
)
21811 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
21813 if (descriptive_type
)
21815 ALLOCATE_GNAT_AUX_TYPE (type
);
21816 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
21820 /* Return the containing type of the die in question using its
21821 DW_AT_containing_type attribute. */
21823 static struct type
*
21824 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21826 struct attribute
*type_attr
;
21827 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21829 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
21831 error (_("Dwarf Error: Problem turning containing type into gdb type "
21832 "[in module %s]"), objfile_name (objfile
));
21834 return lookup_die_type (die
, type_attr
, cu
);
21837 /* Return an error marker type to use for the ill formed type in DIE/CU. */
21839 static struct type
*
21840 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
21842 struct dwarf2_per_objfile
*dwarf2_per_objfile
21843 = cu
->per_cu
->dwarf2_per_objfile
;
21844 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21847 std::string message
21848 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
21849 objfile_name (objfile
),
21850 sect_offset_str (cu
->header
.sect_off
),
21851 sect_offset_str (die
->sect_off
));
21852 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
21853 message
.c_str (), message
.length ());
21855 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
21858 /* Look up the type of DIE in CU using its type attribute ATTR.
21859 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
21860 DW_AT_containing_type.
21861 If there is no type substitute an error marker. */
21863 static struct type
*
21864 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
21865 struct dwarf2_cu
*cu
)
21867 struct dwarf2_per_objfile
*dwarf2_per_objfile
21868 = cu
->per_cu
->dwarf2_per_objfile
;
21869 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21870 struct type
*this_type
;
21872 gdb_assert (attr
->name
== DW_AT_type
21873 || attr
->name
== DW_AT_GNAT_descriptive_type
21874 || attr
->name
== DW_AT_containing_type
);
21876 /* First see if we have it cached. */
21878 if (attr
->form
== DW_FORM_GNU_ref_alt
)
21880 struct dwarf2_per_cu_data
*per_cu
;
21881 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21883 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
21884 dwarf2_per_objfile
);
21885 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
21887 else if (attr_form_is_ref (attr
))
21889 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21891 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
21893 else if (attr
->form
== DW_FORM_ref_sig8
)
21895 ULONGEST signature
= DW_SIGNATURE (attr
);
21897 return get_signatured_type (die
, signature
, cu
);
21901 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
21902 " at %s [in module %s]"),
21903 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
21904 objfile_name (objfile
));
21905 return build_error_marker_type (cu
, die
);
21908 /* If not cached we need to read it in. */
21910 if (this_type
== NULL
)
21912 struct die_info
*type_die
= NULL
;
21913 struct dwarf2_cu
*type_cu
= cu
;
21915 if (attr_form_is_ref (attr
))
21916 type_die
= follow_die_ref (die
, attr
, &type_cu
);
21917 if (type_die
== NULL
)
21918 return build_error_marker_type (cu
, die
);
21919 /* If we find the type now, it's probably because the type came
21920 from an inter-CU reference and the type's CU got expanded before
21922 this_type
= read_type_die (type_die
, type_cu
);
21925 /* If we still don't have a type use an error marker. */
21927 if (this_type
== NULL
)
21928 return build_error_marker_type (cu
, die
);
21933 /* Return the type in DIE, CU.
21934 Returns NULL for invalid types.
21936 This first does a lookup in die_type_hash,
21937 and only reads the die in if necessary.
21939 NOTE: This can be called when reading in partial or full symbols. */
21941 static struct type
*
21942 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
21944 struct type
*this_type
;
21946 this_type
= get_die_type (die
, cu
);
21950 return read_type_die_1 (die
, cu
);
21953 /* Read the type in DIE, CU.
21954 Returns NULL for invalid types. */
21956 static struct type
*
21957 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
21959 struct type
*this_type
= NULL
;
21963 case DW_TAG_class_type
:
21964 case DW_TAG_interface_type
:
21965 case DW_TAG_structure_type
:
21966 case DW_TAG_union_type
:
21967 this_type
= read_structure_type (die
, cu
);
21969 case DW_TAG_enumeration_type
:
21970 this_type
= read_enumeration_type (die
, cu
);
21972 case DW_TAG_subprogram
:
21973 case DW_TAG_subroutine_type
:
21974 case DW_TAG_inlined_subroutine
:
21975 this_type
= read_subroutine_type (die
, cu
);
21977 case DW_TAG_array_type
:
21978 this_type
= read_array_type (die
, cu
);
21980 case DW_TAG_set_type
:
21981 this_type
= read_set_type (die
, cu
);
21983 case DW_TAG_pointer_type
:
21984 this_type
= read_tag_pointer_type (die
, cu
);
21986 case DW_TAG_ptr_to_member_type
:
21987 this_type
= read_tag_ptr_to_member_type (die
, cu
);
21989 case DW_TAG_reference_type
:
21990 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
21992 case DW_TAG_rvalue_reference_type
:
21993 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
21995 case DW_TAG_const_type
:
21996 this_type
= read_tag_const_type (die
, cu
);
21998 case DW_TAG_volatile_type
:
21999 this_type
= read_tag_volatile_type (die
, cu
);
22001 case DW_TAG_restrict_type
:
22002 this_type
= read_tag_restrict_type (die
, cu
);
22004 case DW_TAG_string_type
:
22005 this_type
= read_tag_string_type (die
, cu
);
22007 case DW_TAG_typedef
:
22008 this_type
= read_typedef (die
, cu
);
22010 case DW_TAG_subrange_type
:
22011 this_type
= read_subrange_type (die
, cu
);
22013 case DW_TAG_base_type
:
22014 this_type
= read_base_type (die
, cu
);
22016 case DW_TAG_unspecified_type
:
22017 this_type
= read_unspecified_type (die
, cu
);
22019 case DW_TAG_namespace
:
22020 this_type
= read_namespace_type (die
, cu
);
22022 case DW_TAG_module
:
22023 this_type
= read_module_type (die
, cu
);
22025 case DW_TAG_atomic_type
:
22026 this_type
= read_tag_atomic_type (die
, cu
);
22029 complaint (_("unexpected tag in read_type_die: '%s'"),
22030 dwarf_tag_name (die
->tag
));
22037 /* See if we can figure out if the class lives in a namespace. We do
22038 this by looking for a member function; its demangled name will
22039 contain namespace info, if there is any.
22040 Return the computed name or NULL.
22041 Space for the result is allocated on the objfile's obstack.
22042 This is the full-die version of guess_partial_die_structure_name.
22043 In this case we know DIE has no useful parent. */
22046 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22048 struct die_info
*spec_die
;
22049 struct dwarf2_cu
*spec_cu
;
22050 struct die_info
*child
;
22051 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22054 spec_die
= die_specification (die
, &spec_cu
);
22055 if (spec_die
!= NULL
)
22061 for (child
= die
->child
;
22063 child
= child
->sibling
)
22065 if (child
->tag
== DW_TAG_subprogram
)
22067 const char *linkage_name
= dw2_linkage_name (child
, cu
);
22069 if (linkage_name
!= NULL
)
22072 = language_class_name_from_physname (cu
->language_defn
,
22076 if (actual_name
!= NULL
)
22078 const char *die_name
= dwarf2_name (die
, cu
);
22080 if (die_name
!= NULL
22081 && strcmp (die_name
, actual_name
) != 0)
22083 /* Strip off the class name from the full name.
22084 We want the prefix. */
22085 int die_name_len
= strlen (die_name
);
22086 int actual_name_len
= strlen (actual_name
);
22088 /* Test for '::' as a sanity check. */
22089 if (actual_name_len
> die_name_len
+ 2
22090 && actual_name
[actual_name_len
22091 - die_name_len
- 1] == ':')
22092 name
= (char *) obstack_copy0 (
22093 &objfile
->per_bfd
->storage_obstack
,
22094 actual_name
, actual_name_len
- die_name_len
- 2);
22097 xfree (actual_name
);
22106 /* GCC might emit a nameless typedef that has a linkage name. Determine the
22107 prefix part in such case. See
22108 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22110 static const char *
22111 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22113 struct attribute
*attr
;
22116 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
22117 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
22120 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
22123 attr
= dw2_linkage_name_attr (die
, cu
);
22124 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22127 /* dwarf2_name had to be already called. */
22128 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
22130 /* Strip the base name, keep any leading namespaces/classes. */
22131 base
= strrchr (DW_STRING (attr
), ':');
22132 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
22135 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22136 return (char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22138 &base
[-1] - DW_STRING (attr
));
22141 /* Return the name of the namespace/class that DIE is defined within,
22142 or "" if we can't tell. The caller should not xfree the result.
22144 For example, if we're within the method foo() in the following
22154 then determine_prefix on foo's die will return "N::C". */
22156 static const char *
22157 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22159 struct dwarf2_per_objfile
*dwarf2_per_objfile
22160 = cu
->per_cu
->dwarf2_per_objfile
;
22161 struct die_info
*parent
, *spec_die
;
22162 struct dwarf2_cu
*spec_cu
;
22163 struct type
*parent_type
;
22164 const char *retval
;
22166 if (cu
->language
!= language_cplus
22167 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
22168 && cu
->language
!= language_rust
)
22171 retval
= anonymous_struct_prefix (die
, cu
);
22175 /* We have to be careful in the presence of DW_AT_specification.
22176 For example, with GCC 3.4, given the code
22180 // Definition of N::foo.
22184 then we'll have a tree of DIEs like this:
22186 1: DW_TAG_compile_unit
22187 2: DW_TAG_namespace // N
22188 3: DW_TAG_subprogram // declaration of N::foo
22189 4: DW_TAG_subprogram // definition of N::foo
22190 DW_AT_specification // refers to die #3
22192 Thus, when processing die #4, we have to pretend that we're in
22193 the context of its DW_AT_specification, namely the contex of die
22196 spec_die
= die_specification (die
, &spec_cu
);
22197 if (spec_die
== NULL
)
22198 parent
= die
->parent
;
22201 parent
= spec_die
->parent
;
22205 if (parent
== NULL
)
22207 else if (parent
->building_fullname
)
22210 const char *parent_name
;
22212 /* It has been seen on RealView 2.2 built binaries,
22213 DW_TAG_template_type_param types actually _defined_ as
22214 children of the parent class:
22217 template class <class Enum> Class{};
22218 Class<enum E> class_e;
22220 1: DW_TAG_class_type (Class)
22221 2: DW_TAG_enumeration_type (E)
22222 3: DW_TAG_enumerator (enum1:0)
22223 3: DW_TAG_enumerator (enum2:1)
22225 2: DW_TAG_template_type_param
22226 DW_AT_type DW_FORM_ref_udata (E)
22228 Besides being broken debug info, it can put GDB into an
22229 infinite loop. Consider:
22231 When we're building the full name for Class<E>, we'll start
22232 at Class, and go look over its template type parameters,
22233 finding E. We'll then try to build the full name of E, and
22234 reach here. We're now trying to build the full name of E,
22235 and look over the parent DIE for containing scope. In the
22236 broken case, if we followed the parent DIE of E, we'd again
22237 find Class, and once again go look at its template type
22238 arguments, etc., etc. Simply don't consider such parent die
22239 as source-level parent of this die (it can't be, the language
22240 doesn't allow it), and break the loop here. */
22241 name
= dwarf2_name (die
, cu
);
22242 parent_name
= dwarf2_name (parent
, cu
);
22243 complaint (_("template param type '%s' defined within parent '%s'"),
22244 name
? name
: "<unknown>",
22245 parent_name
? parent_name
: "<unknown>");
22249 switch (parent
->tag
)
22251 case DW_TAG_namespace
:
22252 parent_type
= read_type_die (parent
, cu
);
22253 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
22254 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
22255 Work around this problem here. */
22256 if (cu
->language
== language_cplus
22257 && strcmp (TYPE_NAME (parent_type
), "::") == 0)
22259 /* We give a name to even anonymous namespaces. */
22260 return TYPE_NAME (parent_type
);
22261 case DW_TAG_class_type
:
22262 case DW_TAG_interface_type
:
22263 case DW_TAG_structure_type
:
22264 case DW_TAG_union_type
:
22265 case DW_TAG_module
:
22266 parent_type
= read_type_die (parent
, cu
);
22267 if (TYPE_NAME (parent_type
) != NULL
)
22268 return TYPE_NAME (parent_type
);
22270 /* An anonymous structure is only allowed non-static data
22271 members; no typedefs, no member functions, et cetera.
22272 So it does not need a prefix. */
22274 case DW_TAG_compile_unit
:
22275 case DW_TAG_partial_unit
:
22276 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
22277 if (cu
->language
== language_cplus
22278 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
22279 && die
->child
!= NULL
22280 && (die
->tag
== DW_TAG_class_type
22281 || die
->tag
== DW_TAG_structure_type
22282 || die
->tag
== DW_TAG_union_type
))
22284 char *name
= guess_full_die_structure_name (die
, cu
);
22289 case DW_TAG_enumeration_type
:
22290 parent_type
= read_type_die (parent
, cu
);
22291 if (TYPE_DECLARED_CLASS (parent_type
))
22293 if (TYPE_NAME (parent_type
) != NULL
)
22294 return TYPE_NAME (parent_type
);
22297 /* Fall through. */
22299 return determine_prefix (parent
, cu
);
22303 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
22304 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
22305 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
22306 an obconcat, otherwise allocate storage for the result. The CU argument is
22307 used to determine the language and hence, the appropriate separator. */
22309 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
22312 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
22313 int physname
, struct dwarf2_cu
*cu
)
22315 const char *lead
= "";
22318 if (suffix
== NULL
|| suffix
[0] == '\0'
22319 || prefix
== NULL
|| prefix
[0] == '\0')
22321 else if (cu
->language
== language_d
)
22323 /* For D, the 'main' function could be defined in any module, but it
22324 should never be prefixed. */
22325 if (strcmp (suffix
, "D main") == 0)
22333 else if (cu
->language
== language_fortran
&& physname
)
22335 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
22336 DW_AT_MIPS_linkage_name is preferred and used instead. */
22344 if (prefix
== NULL
)
22346 if (suffix
== NULL
)
22353 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
22355 strcpy (retval
, lead
);
22356 strcat (retval
, prefix
);
22357 strcat (retval
, sep
);
22358 strcat (retval
, suffix
);
22363 /* We have an obstack. */
22364 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
22368 /* Return sibling of die, NULL if no sibling. */
22370 static struct die_info
*
22371 sibling_die (struct die_info
*die
)
22373 return die
->sibling
;
22376 /* Get name of a die, return NULL if not found. */
22378 static const char *
22379 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
22380 struct obstack
*obstack
)
22382 if (name
&& cu
->language
== language_cplus
)
22384 std::string canon_name
= cp_canonicalize_string (name
);
22386 if (!canon_name
.empty ())
22388 if (canon_name
!= name
)
22389 name
= (const char *) obstack_copy0 (obstack
,
22390 canon_name
.c_str (),
22391 canon_name
.length ());
22398 /* Get name of a die, return NULL if not found.
22399 Anonymous namespaces are converted to their magic string. */
22401 static const char *
22402 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22404 struct attribute
*attr
;
22405 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22407 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
22408 if ((!attr
|| !DW_STRING (attr
))
22409 && die
->tag
!= DW_TAG_namespace
22410 && die
->tag
!= DW_TAG_class_type
22411 && die
->tag
!= DW_TAG_interface_type
22412 && die
->tag
!= DW_TAG_structure_type
22413 && die
->tag
!= DW_TAG_union_type
)
22418 case DW_TAG_compile_unit
:
22419 case DW_TAG_partial_unit
:
22420 /* Compilation units have a DW_AT_name that is a filename, not
22421 a source language identifier. */
22422 case DW_TAG_enumeration_type
:
22423 case DW_TAG_enumerator
:
22424 /* These tags always have simple identifiers already; no need
22425 to canonicalize them. */
22426 return DW_STRING (attr
);
22428 case DW_TAG_namespace
:
22429 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
22430 return DW_STRING (attr
);
22431 return CP_ANONYMOUS_NAMESPACE_STR
;
22433 case DW_TAG_class_type
:
22434 case DW_TAG_interface_type
:
22435 case DW_TAG_structure_type
:
22436 case DW_TAG_union_type
:
22437 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
22438 structures or unions. These were of the form "._%d" in GCC 4.1,
22439 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
22440 and GCC 4.4. We work around this problem by ignoring these. */
22441 if (attr
&& DW_STRING (attr
)
22442 && (startswith (DW_STRING (attr
), "._")
22443 || startswith (DW_STRING (attr
), "<anonymous")))
22446 /* GCC might emit a nameless typedef that has a linkage name. See
22447 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22448 if (!attr
|| DW_STRING (attr
) == NULL
)
22450 char *demangled
= NULL
;
22452 attr
= dw2_linkage_name_attr (die
, cu
);
22453 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22456 /* Avoid demangling DW_STRING (attr) the second time on a second
22457 call for the same DIE. */
22458 if (!DW_STRING_IS_CANONICAL (attr
))
22459 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
22465 /* FIXME: we already did this for the partial symbol... */
22468 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22469 demangled
, strlen (demangled
)));
22470 DW_STRING_IS_CANONICAL (attr
) = 1;
22473 /* Strip any leading namespaces/classes, keep only the base name.
22474 DW_AT_name for named DIEs does not contain the prefixes. */
22475 base
= strrchr (DW_STRING (attr
), ':');
22476 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
22479 return DW_STRING (attr
);
22488 if (!DW_STRING_IS_CANONICAL (attr
))
22491 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
22492 &objfile
->per_bfd
->storage_obstack
);
22493 DW_STRING_IS_CANONICAL (attr
) = 1;
22495 return DW_STRING (attr
);
22498 /* Return the die that this die in an extension of, or NULL if there
22499 is none. *EXT_CU is the CU containing DIE on input, and the CU
22500 containing the return value on output. */
22502 static struct die_info
*
22503 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
22505 struct attribute
*attr
;
22507 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
22511 return follow_die_ref (die
, attr
, ext_cu
);
22514 /* Convert a DIE tag into its string name. */
22516 static const char *
22517 dwarf_tag_name (unsigned tag
)
22519 const char *name
= get_DW_TAG_name (tag
);
22522 return "DW_TAG_<unknown>";
22527 /* Convert a DWARF attribute code into its string name. */
22529 static const char *
22530 dwarf_attr_name (unsigned attr
)
22534 #ifdef MIPS /* collides with DW_AT_HP_block_index */
22535 if (attr
== DW_AT_MIPS_fde
)
22536 return "DW_AT_MIPS_fde";
22538 if (attr
== DW_AT_HP_block_index
)
22539 return "DW_AT_HP_block_index";
22542 name
= get_DW_AT_name (attr
);
22545 return "DW_AT_<unknown>";
22550 /* Convert a DWARF value form code into its string name. */
22552 static const char *
22553 dwarf_form_name (unsigned form
)
22555 const char *name
= get_DW_FORM_name (form
);
22558 return "DW_FORM_<unknown>";
22563 static const char *
22564 dwarf_bool_name (unsigned mybool
)
22572 /* Convert a DWARF type code into its string name. */
22574 static const char *
22575 dwarf_type_encoding_name (unsigned enc
)
22577 const char *name
= get_DW_ATE_name (enc
);
22580 return "DW_ATE_<unknown>";
22586 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
22590 print_spaces (indent
, f
);
22591 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
22592 dwarf_tag_name (die
->tag
), die
->abbrev
,
22593 sect_offset_str (die
->sect_off
));
22595 if (die
->parent
!= NULL
)
22597 print_spaces (indent
, f
);
22598 fprintf_unfiltered (f
, " parent at offset: %s\n",
22599 sect_offset_str (die
->parent
->sect_off
));
22602 print_spaces (indent
, f
);
22603 fprintf_unfiltered (f
, " has children: %s\n",
22604 dwarf_bool_name (die
->child
!= NULL
));
22606 print_spaces (indent
, f
);
22607 fprintf_unfiltered (f
, " attributes:\n");
22609 for (i
= 0; i
< die
->num_attrs
; ++i
)
22611 print_spaces (indent
, f
);
22612 fprintf_unfiltered (f
, " %s (%s) ",
22613 dwarf_attr_name (die
->attrs
[i
].name
),
22614 dwarf_form_name (die
->attrs
[i
].form
));
22616 switch (die
->attrs
[i
].form
)
22619 case DW_FORM_GNU_addr_index
:
22620 fprintf_unfiltered (f
, "address: ");
22621 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
22623 case DW_FORM_block2
:
22624 case DW_FORM_block4
:
22625 case DW_FORM_block
:
22626 case DW_FORM_block1
:
22627 fprintf_unfiltered (f
, "block: size %s",
22628 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22630 case DW_FORM_exprloc
:
22631 fprintf_unfiltered (f
, "expression: size %s",
22632 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22634 case DW_FORM_data16
:
22635 fprintf_unfiltered (f
, "constant of 16 bytes");
22637 case DW_FORM_ref_addr
:
22638 fprintf_unfiltered (f
, "ref address: ");
22639 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22641 case DW_FORM_GNU_ref_alt
:
22642 fprintf_unfiltered (f
, "alt ref address: ");
22643 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22649 case DW_FORM_ref_udata
:
22650 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
22651 (long) (DW_UNSND (&die
->attrs
[i
])));
22653 case DW_FORM_data1
:
22654 case DW_FORM_data2
:
22655 case DW_FORM_data4
:
22656 case DW_FORM_data8
:
22657 case DW_FORM_udata
:
22658 case DW_FORM_sdata
:
22659 fprintf_unfiltered (f
, "constant: %s",
22660 pulongest (DW_UNSND (&die
->attrs
[i
])));
22662 case DW_FORM_sec_offset
:
22663 fprintf_unfiltered (f
, "section offset: %s",
22664 pulongest (DW_UNSND (&die
->attrs
[i
])));
22666 case DW_FORM_ref_sig8
:
22667 fprintf_unfiltered (f
, "signature: %s",
22668 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
22670 case DW_FORM_string
:
22672 case DW_FORM_line_strp
:
22673 case DW_FORM_GNU_str_index
:
22674 case DW_FORM_GNU_strp_alt
:
22675 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22676 DW_STRING (&die
->attrs
[i
])
22677 ? DW_STRING (&die
->attrs
[i
]) : "",
22678 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
22681 if (DW_UNSND (&die
->attrs
[i
]))
22682 fprintf_unfiltered (f
, "flag: TRUE");
22684 fprintf_unfiltered (f
, "flag: FALSE");
22686 case DW_FORM_flag_present
:
22687 fprintf_unfiltered (f
, "flag: TRUE");
22689 case DW_FORM_indirect
:
22690 /* The reader will have reduced the indirect form to
22691 the "base form" so this form should not occur. */
22692 fprintf_unfiltered (f
,
22693 "unexpected attribute form: DW_FORM_indirect");
22695 case DW_FORM_implicit_const
:
22696 fprintf_unfiltered (f
, "constant: %s",
22697 plongest (DW_SND (&die
->attrs
[i
])));
22700 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
22701 die
->attrs
[i
].form
);
22704 fprintf_unfiltered (f
, "\n");
22709 dump_die_for_error (struct die_info
*die
)
22711 dump_die_shallow (gdb_stderr
, 0, die
);
22715 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
22717 int indent
= level
* 4;
22719 gdb_assert (die
!= NULL
);
22721 if (level
>= max_level
)
22724 dump_die_shallow (f
, indent
, die
);
22726 if (die
->child
!= NULL
)
22728 print_spaces (indent
, f
);
22729 fprintf_unfiltered (f
, " Children:");
22730 if (level
+ 1 < max_level
)
22732 fprintf_unfiltered (f
, "\n");
22733 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22737 fprintf_unfiltered (f
,
22738 " [not printed, max nesting level reached]\n");
22742 if (die
->sibling
!= NULL
&& level
> 0)
22744 dump_die_1 (f
, level
, max_level
, die
->sibling
);
22748 /* This is called from the pdie macro in gdbinit.in.
22749 It's not static so gcc will keep a copy callable from gdb. */
22752 dump_die (struct die_info
*die
, int max_level
)
22754 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
22758 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
22762 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
22763 to_underlying (die
->sect_off
),
22769 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
22773 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
22775 if (attr_form_is_ref (attr
))
22776 return (sect_offset
) DW_UNSND (attr
);
22778 complaint (_("unsupported die ref attribute form: '%s'"),
22779 dwarf_form_name (attr
->form
));
22783 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
22784 * the value held by the attribute is not constant. */
22787 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
22789 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
22790 return DW_SND (attr
);
22791 else if (attr
->form
== DW_FORM_udata
22792 || attr
->form
== DW_FORM_data1
22793 || attr
->form
== DW_FORM_data2
22794 || attr
->form
== DW_FORM_data4
22795 || attr
->form
== DW_FORM_data8
)
22796 return DW_UNSND (attr
);
22799 /* For DW_FORM_data16 see attr_form_is_constant. */
22800 complaint (_("Attribute value is not a constant (%s)"),
22801 dwarf_form_name (attr
->form
));
22802 return default_value
;
22806 /* Follow reference or signature attribute ATTR of SRC_DIE.
22807 On entry *REF_CU is the CU of SRC_DIE.
22808 On exit *REF_CU is the CU of the result. */
22810 static struct die_info
*
22811 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22812 struct dwarf2_cu
**ref_cu
)
22814 struct die_info
*die
;
22816 if (attr_form_is_ref (attr
))
22817 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22818 else if (attr
->form
== DW_FORM_ref_sig8
)
22819 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22822 dump_die_for_error (src_die
);
22823 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22824 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22830 /* Follow reference OFFSET.
22831 On entry *REF_CU is the CU of the source die referencing OFFSET.
22832 On exit *REF_CU is the CU of the result.
22833 Returns NULL if OFFSET is invalid. */
22835 static struct die_info
*
22836 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22837 struct dwarf2_cu
**ref_cu
)
22839 struct die_info temp_die
;
22840 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22841 struct dwarf2_per_objfile
*dwarf2_per_objfile
22842 = cu
->per_cu
->dwarf2_per_objfile
;
22844 gdb_assert (cu
->per_cu
!= NULL
);
22848 if (cu
->per_cu
->is_debug_types
)
22850 /* .debug_types CUs cannot reference anything outside their CU.
22851 If they need to, they have to reference a signatured type via
22852 DW_FORM_ref_sig8. */
22853 if (!offset_in_cu_p (&cu
->header
, sect_off
))
22856 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22857 || !offset_in_cu_p (&cu
->header
, sect_off
))
22859 struct dwarf2_per_cu_data
*per_cu
;
22861 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22862 dwarf2_per_objfile
);
22864 /* If necessary, add it to the queue and load its DIEs. */
22865 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
22866 load_full_comp_unit (per_cu
, false, cu
->language
);
22868 target_cu
= per_cu
->cu
;
22870 else if (cu
->dies
== NULL
)
22872 /* We're loading full DIEs during partial symbol reading. */
22873 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
22874 load_full_comp_unit (cu
->per_cu
, false, language_minimal
);
22877 *ref_cu
= target_cu
;
22878 temp_die
.sect_off
= sect_off
;
22879 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22881 to_underlying (sect_off
));
22884 /* Follow reference attribute ATTR of SRC_DIE.
22885 On entry *REF_CU is the CU of SRC_DIE.
22886 On exit *REF_CU is the CU of the result. */
22888 static struct die_info
*
22889 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22890 struct dwarf2_cu
**ref_cu
)
22892 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22893 struct dwarf2_cu
*cu
= *ref_cu
;
22894 struct die_info
*die
;
22896 die
= follow_die_offset (sect_off
,
22897 (attr
->form
== DW_FORM_GNU_ref_alt
22898 || cu
->per_cu
->is_dwz
),
22901 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
22902 "at %s [in module %s]"),
22903 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
22904 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
22909 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
22910 Returned value is intended for DW_OP_call*. Returned
22911 dwarf2_locexpr_baton->data has lifetime of
22912 PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */
22914 struct dwarf2_locexpr_baton
22915 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
22916 struct dwarf2_per_cu_data
*per_cu
,
22917 CORE_ADDR (*get_frame_pc
) (void *baton
),
22920 struct dwarf2_cu
*cu
;
22921 struct die_info
*die
;
22922 struct attribute
*attr
;
22923 struct dwarf2_locexpr_baton retval
;
22924 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
22925 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22927 if (per_cu
->cu
== NULL
)
22928 load_cu (per_cu
, false);
22932 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22933 Instead just throw an error, not much else we can do. */
22934 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22935 sect_offset_str (sect_off
), objfile_name (objfile
));
22938 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22940 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22941 sect_offset_str (sect_off
), objfile_name (objfile
));
22943 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22946 /* DWARF: "If there is no such attribute, then there is no effect.".
22947 DATA is ignored if SIZE is 0. */
22949 retval
.data
= NULL
;
22952 else if (attr_form_is_section_offset (attr
))
22954 struct dwarf2_loclist_baton loclist_baton
;
22955 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22958 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
22960 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
22962 retval
.size
= size
;
22966 if (!attr_form_is_block (attr
))
22967 error (_("Dwarf Error: DIE at %s referenced in module %s "
22968 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
22969 sect_offset_str (sect_off
), objfile_name (objfile
));
22971 retval
.data
= DW_BLOCK (attr
)->data
;
22972 retval
.size
= DW_BLOCK (attr
)->size
;
22974 retval
.per_cu
= cu
->per_cu
;
22976 age_cached_comp_units (dwarf2_per_objfile
);
22981 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
22984 struct dwarf2_locexpr_baton
22985 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
22986 struct dwarf2_per_cu_data
*per_cu
,
22987 CORE_ADDR (*get_frame_pc
) (void *baton
),
22990 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
22992 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
22995 /* Write a constant of a given type as target-ordered bytes into
22998 static const gdb_byte
*
22999 write_constant_as_bytes (struct obstack
*obstack
,
23000 enum bfd_endian byte_order
,
23007 *len
= TYPE_LENGTH (type
);
23008 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23009 store_unsigned_integer (result
, *len
, byte_order
, value
);
23014 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
23015 pointer to the constant bytes and set LEN to the length of the
23016 data. If memory is needed, allocate it on OBSTACK. If the DIE
23017 does not have a DW_AT_const_value, return NULL. */
23020 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
23021 struct dwarf2_per_cu_data
*per_cu
,
23022 struct obstack
*obstack
,
23025 struct dwarf2_cu
*cu
;
23026 struct die_info
*die
;
23027 struct attribute
*attr
;
23028 const gdb_byte
*result
= NULL
;
23031 enum bfd_endian byte_order
;
23032 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
23034 if (per_cu
->cu
== NULL
)
23035 load_cu (per_cu
, false);
23039 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23040 Instead just throw an error, not much else we can do. */
23041 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23042 sect_offset_str (sect_off
), objfile_name (objfile
));
23045 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23047 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23048 sect_offset_str (sect_off
), objfile_name (objfile
));
23050 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
23054 byte_order
= (bfd_big_endian (objfile
->obfd
)
23055 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
23057 switch (attr
->form
)
23060 case DW_FORM_GNU_addr_index
:
23064 *len
= cu
->header
.addr_size
;
23065 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23066 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
23070 case DW_FORM_string
:
23072 case DW_FORM_GNU_str_index
:
23073 case DW_FORM_GNU_strp_alt
:
23074 /* DW_STRING is already allocated on the objfile obstack, point
23076 result
= (const gdb_byte
*) DW_STRING (attr
);
23077 *len
= strlen (DW_STRING (attr
));
23079 case DW_FORM_block1
:
23080 case DW_FORM_block2
:
23081 case DW_FORM_block4
:
23082 case DW_FORM_block
:
23083 case DW_FORM_exprloc
:
23084 case DW_FORM_data16
:
23085 result
= DW_BLOCK (attr
)->data
;
23086 *len
= DW_BLOCK (attr
)->size
;
23089 /* The DW_AT_const_value attributes are supposed to carry the
23090 symbol's value "represented as it would be on the target
23091 architecture." By the time we get here, it's already been
23092 converted to host endianness, so we just need to sign- or
23093 zero-extend it as appropriate. */
23094 case DW_FORM_data1
:
23095 type
= die_type (die
, cu
);
23096 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
23097 if (result
== NULL
)
23098 result
= write_constant_as_bytes (obstack
, byte_order
,
23101 case DW_FORM_data2
:
23102 type
= die_type (die
, cu
);
23103 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
23104 if (result
== NULL
)
23105 result
= write_constant_as_bytes (obstack
, byte_order
,
23108 case DW_FORM_data4
:
23109 type
= die_type (die
, cu
);
23110 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
23111 if (result
== NULL
)
23112 result
= write_constant_as_bytes (obstack
, byte_order
,
23115 case DW_FORM_data8
:
23116 type
= die_type (die
, cu
);
23117 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
23118 if (result
== NULL
)
23119 result
= write_constant_as_bytes (obstack
, byte_order
,
23123 case DW_FORM_sdata
:
23124 case DW_FORM_implicit_const
:
23125 type
= die_type (die
, cu
);
23126 result
= write_constant_as_bytes (obstack
, byte_order
,
23127 type
, DW_SND (attr
), len
);
23130 case DW_FORM_udata
:
23131 type
= die_type (die
, cu
);
23132 result
= write_constant_as_bytes (obstack
, byte_order
,
23133 type
, DW_UNSND (attr
), len
);
23137 complaint (_("unsupported const value attribute form: '%s'"),
23138 dwarf_form_name (attr
->form
));
23145 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
23146 valid type for this die is found. */
23149 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
23150 struct dwarf2_per_cu_data
*per_cu
)
23152 struct dwarf2_cu
*cu
;
23153 struct die_info
*die
;
23155 if (per_cu
->cu
== NULL
)
23156 load_cu (per_cu
, false);
23161 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23165 return die_type (die
, cu
);
23168 /* Return the type of the DIE at DIE_OFFSET in the CU named by
23172 dwarf2_get_die_type (cu_offset die_offset
,
23173 struct dwarf2_per_cu_data
*per_cu
)
23175 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
23176 return get_die_type_at_offset (die_offset_sect
, per_cu
);
23179 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
23180 On entry *REF_CU is the CU of SRC_DIE.
23181 On exit *REF_CU is the CU of the result.
23182 Returns NULL if the referenced DIE isn't found. */
23184 static struct die_info
*
23185 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
23186 struct dwarf2_cu
**ref_cu
)
23188 struct die_info temp_die
;
23189 struct dwarf2_cu
*sig_cu
;
23190 struct die_info
*die
;
23192 /* While it might be nice to assert sig_type->type == NULL here,
23193 we can get here for DW_AT_imported_declaration where we need
23194 the DIE not the type. */
23196 /* If necessary, add it to the queue and load its DIEs. */
23198 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
23199 read_signatured_type (sig_type
);
23201 sig_cu
= sig_type
->per_cu
.cu
;
23202 gdb_assert (sig_cu
!= NULL
);
23203 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
23204 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
23205 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
23206 to_underlying (temp_die
.sect_off
));
23209 struct dwarf2_per_objfile
*dwarf2_per_objfile
23210 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
23212 /* For .gdb_index version 7 keep track of included TUs.
23213 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
23214 if (dwarf2_per_objfile
->index_table
!= NULL
23215 && dwarf2_per_objfile
->index_table
->version
<= 7)
23217 VEC_safe_push (dwarf2_per_cu_ptr
,
23218 (*ref_cu
)->per_cu
->imported_symtabs
,
23229 /* Follow signatured type referenced by ATTR in SRC_DIE.
23230 On entry *REF_CU is the CU of SRC_DIE.
23231 On exit *REF_CU is the CU of the result.
23232 The result is the DIE of the type.
23233 If the referenced type cannot be found an error is thrown. */
23235 static struct die_info
*
23236 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23237 struct dwarf2_cu
**ref_cu
)
23239 ULONGEST signature
= DW_SIGNATURE (attr
);
23240 struct signatured_type
*sig_type
;
23241 struct die_info
*die
;
23243 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
23245 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
23246 /* sig_type will be NULL if the signatured type is missing from
23248 if (sig_type
== NULL
)
23250 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23251 " from DIE at %s [in module %s]"),
23252 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23253 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23256 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
23259 dump_die_for_error (src_die
);
23260 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23261 " from DIE at %s [in module %s]"),
23262 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23263 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23269 /* Get the type specified by SIGNATURE referenced in DIE/CU,
23270 reading in and processing the type unit if necessary. */
23272 static struct type
*
23273 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
23274 struct dwarf2_cu
*cu
)
23276 struct dwarf2_per_objfile
*dwarf2_per_objfile
23277 = cu
->per_cu
->dwarf2_per_objfile
;
23278 struct signatured_type
*sig_type
;
23279 struct dwarf2_cu
*type_cu
;
23280 struct die_info
*type_die
;
23283 sig_type
= lookup_signatured_type (cu
, signature
);
23284 /* sig_type will be NULL if the signatured type is missing from
23286 if (sig_type
== NULL
)
23288 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23289 " from DIE at %s [in module %s]"),
23290 hex_string (signature
), sect_offset_str (die
->sect_off
),
23291 objfile_name (dwarf2_per_objfile
->objfile
));
23292 return build_error_marker_type (cu
, die
);
23295 /* If we already know the type we're done. */
23296 if (sig_type
->type
!= NULL
)
23297 return sig_type
->type
;
23300 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
23301 if (type_die
!= NULL
)
23303 /* N.B. We need to call get_die_type to ensure only one type for this DIE
23304 is created. This is important, for example, because for c++ classes
23305 we need TYPE_NAME set which is only done by new_symbol. Blech. */
23306 type
= read_type_die (type_die
, type_cu
);
23309 complaint (_("Dwarf Error: Cannot build signatured type %s"
23310 " referenced from DIE at %s [in module %s]"),
23311 hex_string (signature
), sect_offset_str (die
->sect_off
),
23312 objfile_name (dwarf2_per_objfile
->objfile
));
23313 type
= build_error_marker_type (cu
, die
);
23318 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23319 " from DIE at %s [in module %s]"),
23320 hex_string (signature
), sect_offset_str (die
->sect_off
),
23321 objfile_name (dwarf2_per_objfile
->objfile
));
23322 type
= build_error_marker_type (cu
, die
);
23324 sig_type
->type
= type
;
23329 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
23330 reading in and processing the type unit if necessary. */
23332 static struct type
*
23333 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
23334 struct dwarf2_cu
*cu
) /* ARI: editCase function */
23336 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
23337 if (attr_form_is_ref (attr
))
23339 struct dwarf2_cu
*type_cu
= cu
;
23340 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
23342 return read_type_die (type_die
, type_cu
);
23344 else if (attr
->form
== DW_FORM_ref_sig8
)
23346 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
23350 struct dwarf2_per_objfile
*dwarf2_per_objfile
23351 = cu
->per_cu
->dwarf2_per_objfile
;
23353 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
23354 " at %s [in module %s]"),
23355 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
23356 objfile_name (dwarf2_per_objfile
->objfile
));
23357 return build_error_marker_type (cu
, die
);
23361 /* Load the DIEs associated with type unit PER_CU into memory. */
23364 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
23366 struct signatured_type
*sig_type
;
23368 /* Caller is responsible for ensuring type_unit_groups don't get here. */
23369 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
23371 /* We have the per_cu, but we need the signatured_type.
23372 Fortunately this is an easy translation. */
23373 gdb_assert (per_cu
->is_debug_types
);
23374 sig_type
= (struct signatured_type
*) per_cu
;
23376 gdb_assert (per_cu
->cu
== NULL
);
23378 read_signatured_type (sig_type
);
23380 gdb_assert (per_cu
->cu
!= NULL
);
23383 /* die_reader_func for read_signatured_type.
23384 This is identical to load_full_comp_unit_reader,
23385 but is kept separate for now. */
23388 read_signatured_type_reader (const struct die_reader_specs
*reader
,
23389 const gdb_byte
*info_ptr
,
23390 struct die_info
*comp_unit_die
,
23394 struct dwarf2_cu
*cu
= reader
->cu
;
23396 gdb_assert (cu
->die_hash
== NULL
);
23398 htab_create_alloc_ex (cu
->header
.length
/ 12,
23402 &cu
->comp_unit_obstack
,
23403 hashtab_obstack_allocate
,
23404 dummy_obstack_deallocate
);
23407 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
23408 &info_ptr
, comp_unit_die
);
23409 cu
->dies
= comp_unit_die
;
23410 /* comp_unit_die is not stored in die_hash, no need. */
23412 /* We try not to read any attributes in this function, because not
23413 all CUs needed for references have been loaded yet, and symbol
23414 table processing isn't initialized. But we have to set the CU language,
23415 or we won't be able to build types correctly.
23416 Similarly, if we do not read the producer, we can not apply
23417 producer-specific interpretation. */
23418 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
23421 /* Read in a signatured type and build its CU and DIEs.
23422 If the type is a stub for the real type in a DWO file,
23423 read in the real type from the DWO file as well. */
23426 read_signatured_type (struct signatured_type
*sig_type
)
23428 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
23430 gdb_assert (per_cu
->is_debug_types
);
23431 gdb_assert (per_cu
->cu
== NULL
);
23433 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1, false,
23434 read_signatured_type_reader
, NULL
);
23435 sig_type
->per_cu
.tu_read
= 1;
23438 /* Decode simple location descriptions.
23439 Given a pointer to a dwarf block that defines a location, compute
23440 the location and return the value.
23442 NOTE drow/2003-11-18: This function is called in two situations
23443 now: for the address of static or global variables (partial symbols
23444 only) and for offsets into structures which are expected to be
23445 (more or less) constant. The partial symbol case should go away,
23446 and only the constant case should remain. That will let this
23447 function complain more accurately. A few special modes are allowed
23448 without complaint for global variables (for instance, global
23449 register values and thread-local values).
23451 A location description containing no operations indicates that the
23452 object is optimized out. The return value is 0 for that case.
23453 FIXME drow/2003-11-16: No callers check for this case any more; soon all
23454 callers will only want a very basic result and this can become a
23457 Note that stack[0] is unused except as a default error return. */
23460 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
23462 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
23464 size_t size
= blk
->size
;
23465 const gdb_byte
*data
= blk
->data
;
23466 CORE_ADDR stack
[64];
23468 unsigned int bytes_read
, unsnd
;
23474 stack
[++stacki
] = 0;
23513 stack
[++stacki
] = op
- DW_OP_lit0
;
23548 stack
[++stacki
] = op
- DW_OP_reg0
;
23550 dwarf2_complex_location_expr_complaint ();
23554 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
23556 stack
[++stacki
] = unsnd
;
23558 dwarf2_complex_location_expr_complaint ();
23562 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
23567 case DW_OP_const1u
:
23568 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
23572 case DW_OP_const1s
:
23573 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
23577 case DW_OP_const2u
:
23578 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
23582 case DW_OP_const2s
:
23583 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
23587 case DW_OP_const4u
:
23588 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
23592 case DW_OP_const4s
:
23593 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
23597 case DW_OP_const8u
:
23598 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
23603 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
23609 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
23614 stack
[stacki
+ 1] = stack
[stacki
];
23619 stack
[stacki
- 1] += stack
[stacki
];
23623 case DW_OP_plus_uconst
:
23624 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
23630 stack
[stacki
- 1] -= stack
[stacki
];
23635 /* If we're not the last op, then we definitely can't encode
23636 this using GDB's address_class enum. This is valid for partial
23637 global symbols, although the variable's address will be bogus
23640 dwarf2_complex_location_expr_complaint ();
23643 case DW_OP_GNU_push_tls_address
:
23644 case DW_OP_form_tls_address
:
23645 /* The top of the stack has the offset from the beginning
23646 of the thread control block at which the variable is located. */
23647 /* Nothing should follow this operator, so the top of stack would
23649 /* This is valid for partial global symbols, but the variable's
23650 address will be bogus in the psymtab. Make it always at least
23651 non-zero to not look as a variable garbage collected by linker
23652 which have DW_OP_addr 0. */
23654 dwarf2_complex_location_expr_complaint ();
23658 case DW_OP_GNU_uninit
:
23661 case DW_OP_GNU_addr_index
:
23662 case DW_OP_GNU_const_index
:
23663 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
23670 const char *name
= get_DW_OP_name (op
);
23673 complaint (_("unsupported stack op: '%s'"),
23676 complaint (_("unsupported stack op: '%02x'"),
23680 return (stack
[stacki
]);
23683 /* Enforce maximum stack depth of SIZE-1 to avoid writing
23684 outside of the allocated space. Also enforce minimum>0. */
23685 if (stacki
>= ARRAY_SIZE (stack
) - 1)
23687 complaint (_("location description stack overflow"));
23693 complaint (_("location description stack underflow"));
23697 return (stack
[stacki
]);
23700 /* memory allocation interface */
23702 static struct dwarf_block
*
23703 dwarf_alloc_block (struct dwarf2_cu
*cu
)
23705 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
23708 static struct die_info
*
23709 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
23711 struct die_info
*die
;
23712 size_t size
= sizeof (struct die_info
);
23715 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
23717 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
23718 memset (die
, 0, sizeof (struct die_info
));
23723 /* Macro support. */
23725 /* Return file name relative to the compilation directory of file number I in
23726 *LH's file name table. The result is allocated using xmalloc; the caller is
23727 responsible for freeing it. */
23730 file_file_name (int file
, struct line_header
*lh
)
23732 /* Is the file number a valid index into the line header's file name
23733 table? Remember that file numbers start with one, not zero. */
23734 if (1 <= file
&& file
<= lh
->file_names
.size ())
23736 const file_entry
&fe
= lh
->file_names
[file
- 1];
23738 if (!IS_ABSOLUTE_PATH (fe
.name
))
23740 const char *dir
= fe
.include_dir (lh
);
23742 return concat (dir
, SLASH_STRING
, fe
.name
, (char *) NULL
);
23744 return xstrdup (fe
.name
);
23748 /* The compiler produced a bogus file number. We can at least
23749 record the macro definitions made in the file, even if we
23750 won't be able to find the file by name. */
23751 char fake_name
[80];
23753 xsnprintf (fake_name
, sizeof (fake_name
),
23754 "<bad macro file number %d>", file
);
23756 complaint (_("bad file number in macro information (%d)"),
23759 return xstrdup (fake_name
);
23763 /* Return the full name of file number I in *LH's file name table.
23764 Use COMP_DIR as the name of the current directory of the
23765 compilation. The result is allocated using xmalloc; the caller is
23766 responsible for freeing it. */
23768 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
23770 /* Is the file number a valid index into the line header's file name
23771 table? Remember that file numbers start with one, not zero. */
23772 if (1 <= file
&& file
<= lh
->file_names
.size ())
23774 char *relative
= file_file_name (file
, lh
);
23776 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
23778 return reconcat (relative
, comp_dir
, SLASH_STRING
,
23779 relative
, (char *) NULL
);
23782 return file_file_name (file
, lh
);
23786 static struct macro_source_file
*
23787 macro_start_file (struct dwarf2_cu
*cu
,
23788 int file
, int line
,
23789 struct macro_source_file
*current_file
,
23790 struct line_header
*lh
)
23792 /* File name relative to the compilation directory of this source file. */
23793 char *file_name
= file_file_name (file
, lh
);
23795 if (! current_file
)
23797 /* Note: We don't create a macro table for this compilation unit
23798 at all until we actually get a filename. */
23799 struct macro_table
*macro_table
= cu
->builder
->get_macro_table ();
23801 /* If we have no current file, then this must be the start_file
23802 directive for the compilation unit's main source file. */
23803 current_file
= macro_set_main (macro_table
, file_name
);
23804 macro_define_special (macro_table
);
23807 current_file
= macro_include (current_file
, line
, file_name
);
23811 return current_file
;
23814 static const char *
23815 consume_improper_spaces (const char *p
, const char *body
)
23819 complaint (_("macro definition contains spaces "
23820 "in formal argument list:\n`%s'"),
23832 parse_macro_definition (struct macro_source_file
*file
, int line
,
23837 /* The body string takes one of two forms. For object-like macro
23838 definitions, it should be:
23840 <macro name> " " <definition>
23842 For function-like macro definitions, it should be:
23844 <macro name> "() " <definition>
23846 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
23848 Spaces may appear only where explicitly indicated, and in the
23851 The Dwarf 2 spec says that an object-like macro's name is always
23852 followed by a space, but versions of GCC around March 2002 omit
23853 the space when the macro's definition is the empty string.
23855 The Dwarf 2 spec says that there should be no spaces between the
23856 formal arguments in a function-like macro's formal argument list,
23857 but versions of GCC around March 2002 include spaces after the
23861 /* Find the extent of the macro name. The macro name is terminated
23862 by either a space or null character (for an object-like macro) or
23863 an opening paren (for a function-like macro). */
23864 for (p
= body
; *p
; p
++)
23865 if (*p
== ' ' || *p
== '(')
23868 if (*p
== ' ' || *p
== '\0')
23870 /* It's an object-like macro. */
23871 int name_len
= p
- body
;
23872 char *name
= savestring (body
, name_len
);
23873 const char *replacement
;
23876 replacement
= body
+ name_len
+ 1;
23879 dwarf2_macro_malformed_definition_complaint (body
);
23880 replacement
= body
+ name_len
;
23883 macro_define_object (file
, line
, name
, replacement
);
23887 else if (*p
== '(')
23889 /* It's a function-like macro. */
23890 char *name
= savestring (body
, p
- body
);
23893 char **argv
= XNEWVEC (char *, argv_size
);
23897 p
= consume_improper_spaces (p
, body
);
23899 /* Parse the formal argument list. */
23900 while (*p
&& *p
!= ')')
23902 /* Find the extent of the current argument name. */
23903 const char *arg_start
= p
;
23905 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
23908 if (! *p
|| p
== arg_start
)
23909 dwarf2_macro_malformed_definition_complaint (body
);
23912 /* Make sure argv has room for the new argument. */
23913 if (argc
>= argv_size
)
23916 argv
= XRESIZEVEC (char *, argv
, argv_size
);
23919 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
23922 p
= consume_improper_spaces (p
, body
);
23924 /* Consume the comma, if present. */
23929 p
= consume_improper_spaces (p
, body
);
23938 /* Perfectly formed definition, no complaints. */
23939 macro_define_function (file
, line
, name
,
23940 argc
, (const char **) argv
,
23942 else if (*p
== '\0')
23944 /* Complain, but do define it. */
23945 dwarf2_macro_malformed_definition_complaint (body
);
23946 macro_define_function (file
, line
, name
,
23947 argc
, (const char **) argv
,
23951 /* Just complain. */
23952 dwarf2_macro_malformed_definition_complaint (body
);
23955 /* Just complain. */
23956 dwarf2_macro_malformed_definition_complaint (body
);
23962 for (i
= 0; i
< argc
; i
++)
23968 dwarf2_macro_malformed_definition_complaint (body
);
23971 /* Skip some bytes from BYTES according to the form given in FORM.
23972 Returns the new pointer. */
23974 static const gdb_byte
*
23975 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
23976 enum dwarf_form form
,
23977 unsigned int offset_size
,
23978 struct dwarf2_section_info
*section
)
23980 unsigned int bytes_read
;
23984 case DW_FORM_data1
:
23989 case DW_FORM_data2
:
23993 case DW_FORM_data4
:
23997 case DW_FORM_data8
:
24001 case DW_FORM_data16
:
24005 case DW_FORM_string
:
24006 read_direct_string (abfd
, bytes
, &bytes_read
);
24007 bytes
+= bytes_read
;
24010 case DW_FORM_sec_offset
:
24012 case DW_FORM_GNU_strp_alt
:
24013 bytes
+= offset_size
;
24016 case DW_FORM_block
:
24017 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
24018 bytes
+= bytes_read
;
24021 case DW_FORM_block1
:
24022 bytes
+= 1 + read_1_byte (abfd
, bytes
);
24024 case DW_FORM_block2
:
24025 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
24027 case DW_FORM_block4
:
24028 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
24031 case DW_FORM_sdata
:
24032 case DW_FORM_udata
:
24033 case DW_FORM_GNU_addr_index
:
24034 case DW_FORM_GNU_str_index
:
24035 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
24038 dwarf2_section_buffer_overflow_complaint (section
);
24043 case DW_FORM_implicit_const
:
24048 complaint (_("invalid form 0x%x in `%s'"),
24049 form
, get_section_name (section
));
24057 /* A helper for dwarf_decode_macros that handles skipping an unknown
24058 opcode. Returns an updated pointer to the macro data buffer; or,
24059 on error, issues a complaint and returns NULL. */
24061 static const gdb_byte
*
24062 skip_unknown_opcode (unsigned int opcode
,
24063 const gdb_byte
**opcode_definitions
,
24064 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24066 unsigned int offset_size
,
24067 struct dwarf2_section_info
*section
)
24069 unsigned int bytes_read
, i
;
24071 const gdb_byte
*defn
;
24073 if (opcode_definitions
[opcode
] == NULL
)
24075 complaint (_("unrecognized DW_MACFINO opcode 0x%x"),
24080 defn
= opcode_definitions
[opcode
];
24081 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
24082 defn
+= bytes_read
;
24084 for (i
= 0; i
< arg
; ++i
)
24086 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
24087 (enum dwarf_form
) defn
[i
], offset_size
,
24089 if (mac_ptr
== NULL
)
24091 /* skip_form_bytes already issued the complaint. */
24099 /* A helper function which parses the header of a macro section.
24100 If the macro section is the extended (for now called "GNU") type,
24101 then this updates *OFFSET_SIZE. Returns a pointer to just after
24102 the header, or issues a complaint and returns NULL on error. */
24104 static const gdb_byte
*
24105 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
24107 const gdb_byte
*mac_ptr
,
24108 unsigned int *offset_size
,
24109 int section_is_gnu
)
24111 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
24113 if (section_is_gnu
)
24115 unsigned int version
, flags
;
24117 version
= read_2_bytes (abfd
, mac_ptr
);
24118 if (version
!= 4 && version
!= 5)
24120 complaint (_("unrecognized version `%d' in .debug_macro section"),
24126 flags
= read_1_byte (abfd
, mac_ptr
);
24128 *offset_size
= (flags
& 1) ? 8 : 4;
24130 if ((flags
& 2) != 0)
24131 /* We don't need the line table offset. */
24132 mac_ptr
+= *offset_size
;
24134 /* Vendor opcode descriptions. */
24135 if ((flags
& 4) != 0)
24137 unsigned int i
, count
;
24139 count
= read_1_byte (abfd
, mac_ptr
);
24141 for (i
= 0; i
< count
; ++i
)
24143 unsigned int opcode
, bytes_read
;
24146 opcode
= read_1_byte (abfd
, mac_ptr
);
24148 opcode_definitions
[opcode
] = mac_ptr
;
24149 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24150 mac_ptr
+= bytes_read
;
24159 /* A helper for dwarf_decode_macros that handles the GNU extensions,
24160 including DW_MACRO_import. */
24163 dwarf_decode_macro_bytes (struct dwarf2_cu
*cu
,
24165 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24166 struct macro_source_file
*current_file
,
24167 struct line_header
*lh
,
24168 struct dwarf2_section_info
*section
,
24169 int section_is_gnu
, int section_is_dwz
,
24170 unsigned int offset_size
,
24171 htab_t include_hash
)
24173 struct dwarf2_per_objfile
*dwarf2_per_objfile
24174 = cu
->per_cu
->dwarf2_per_objfile
;
24175 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24176 enum dwarf_macro_record_type macinfo_type
;
24177 int at_commandline
;
24178 const gdb_byte
*opcode_definitions
[256];
24180 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24181 &offset_size
, section_is_gnu
);
24182 if (mac_ptr
== NULL
)
24184 /* We already issued a complaint. */
24188 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
24189 GDB is still reading the definitions from command line. First
24190 DW_MACINFO_start_file will need to be ignored as it was already executed
24191 to create CURRENT_FILE for the main source holding also the command line
24192 definitions. On first met DW_MACINFO_start_file this flag is reset to
24193 normally execute all the remaining DW_MACINFO_start_file macinfos. */
24195 at_commandline
= 1;
24199 /* Do we at least have room for a macinfo type byte? */
24200 if (mac_ptr
>= mac_end
)
24202 dwarf2_section_buffer_overflow_complaint (section
);
24206 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24209 /* Note that we rely on the fact that the corresponding GNU and
24210 DWARF constants are the same. */
24212 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24213 switch (macinfo_type
)
24215 /* A zero macinfo type indicates the end of the macro
24220 case DW_MACRO_define
:
24221 case DW_MACRO_undef
:
24222 case DW_MACRO_define_strp
:
24223 case DW_MACRO_undef_strp
:
24224 case DW_MACRO_define_sup
:
24225 case DW_MACRO_undef_sup
:
24227 unsigned int bytes_read
;
24232 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24233 mac_ptr
+= bytes_read
;
24235 if (macinfo_type
== DW_MACRO_define
24236 || macinfo_type
== DW_MACRO_undef
)
24238 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24239 mac_ptr
+= bytes_read
;
24243 LONGEST str_offset
;
24245 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24246 mac_ptr
+= offset_size
;
24248 if (macinfo_type
== DW_MACRO_define_sup
24249 || macinfo_type
== DW_MACRO_undef_sup
24252 struct dwz_file
*dwz
24253 = dwarf2_get_dwz_file (dwarf2_per_objfile
);
24255 body
= read_indirect_string_from_dwz (objfile
,
24259 body
= read_indirect_string_at_offset (dwarf2_per_objfile
,
24263 is_define
= (macinfo_type
== DW_MACRO_define
24264 || macinfo_type
== DW_MACRO_define_strp
24265 || macinfo_type
== DW_MACRO_define_sup
);
24266 if (! current_file
)
24268 /* DWARF violation as no main source is present. */
24269 complaint (_("debug info with no main source gives macro %s "
24271 is_define
? _("definition") : _("undefinition"),
24275 if ((line
== 0 && !at_commandline
)
24276 || (line
!= 0 && at_commandline
))
24277 complaint (_("debug info gives %s macro %s with %s line %d: %s"),
24278 at_commandline
? _("command-line") : _("in-file"),
24279 is_define
? _("definition") : _("undefinition"),
24280 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
24283 parse_macro_definition (current_file
, line
, body
);
24286 gdb_assert (macinfo_type
== DW_MACRO_undef
24287 || macinfo_type
== DW_MACRO_undef_strp
24288 || macinfo_type
== DW_MACRO_undef_sup
);
24289 macro_undef (current_file
, line
, body
);
24294 case DW_MACRO_start_file
:
24296 unsigned int bytes_read
;
24299 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24300 mac_ptr
+= bytes_read
;
24301 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24302 mac_ptr
+= bytes_read
;
24304 if ((line
== 0 && !at_commandline
)
24305 || (line
!= 0 && at_commandline
))
24306 complaint (_("debug info gives source %d included "
24307 "from %s at %s line %d"),
24308 file
, at_commandline
? _("command-line") : _("file"),
24309 line
== 0 ? _("zero") : _("non-zero"), line
);
24311 if (at_commandline
)
24313 /* This DW_MACRO_start_file was executed in the
24315 at_commandline
= 0;
24318 current_file
= macro_start_file (cu
, file
, line
, current_file
,
24323 case DW_MACRO_end_file
:
24324 if (! current_file
)
24325 complaint (_("macro debug info has an unmatched "
24326 "`close_file' directive"));
24329 current_file
= current_file
->included_by
;
24330 if (! current_file
)
24332 enum dwarf_macro_record_type next_type
;
24334 /* GCC circa March 2002 doesn't produce the zero
24335 type byte marking the end of the compilation
24336 unit. Complain if it's not there, but exit no
24339 /* Do we at least have room for a macinfo type byte? */
24340 if (mac_ptr
>= mac_end
)
24342 dwarf2_section_buffer_overflow_complaint (section
);
24346 /* We don't increment mac_ptr here, so this is just
24349 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
24351 if (next_type
!= 0)
24352 complaint (_("no terminating 0-type entry for "
24353 "macros in `.debug_macinfo' section"));
24360 case DW_MACRO_import
:
24361 case DW_MACRO_import_sup
:
24365 bfd
*include_bfd
= abfd
;
24366 struct dwarf2_section_info
*include_section
= section
;
24367 const gdb_byte
*include_mac_end
= mac_end
;
24368 int is_dwz
= section_is_dwz
;
24369 const gdb_byte
*new_mac_ptr
;
24371 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24372 mac_ptr
+= offset_size
;
24374 if (macinfo_type
== DW_MACRO_import_sup
)
24376 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
24378 dwarf2_read_section (objfile
, &dwz
->macro
);
24380 include_section
= &dwz
->macro
;
24381 include_bfd
= get_section_bfd_owner (include_section
);
24382 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
24386 new_mac_ptr
= include_section
->buffer
+ offset
;
24387 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
24391 /* This has actually happened; see
24392 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
24393 complaint (_("recursive DW_MACRO_import in "
24394 ".debug_macro section"));
24398 *slot
= (void *) new_mac_ptr
;
24400 dwarf_decode_macro_bytes (cu
, include_bfd
, new_mac_ptr
,
24401 include_mac_end
, current_file
, lh
,
24402 section
, section_is_gnu
, is_dwz
,
24403 offset_size
, include_hash
);
24405 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
24410 case DW_MACINFO_vendor_ext
:
24411 if (!section_is_gnu
)
24413 unsigned int bytes_read
;
24415 /* This reads the constant, but since we don't recognize
24416 any vendor extensions, we ignore it. */
24417 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24418 mac_ptr
+= bytes_read
;
24419 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24420 mac_ptr
+= bytes_read
;
24422 /* We don't recognize any vendor extensions. */
24428 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24429 mac_ptr
, mac_end
, abfd
, offset_size
,
24431 if (mac_ptr
== NULL
)
24436 } while (macinfo_type
!= 0);
24440 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
24441 int section_is_gnu
)
24443 struct dwarf2_per_objfile
*dwarf2_per_objfile
24444 = cu
->per_cu
->dwarf2_per_objfile
;
24445 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24446 struct line_header
*lh
= cu
->line_header
;
24448 const gdb_byte
*mac_ptr
, *mac_end
;
24449 struct macro_source_file
*current_file
= 0;
24450 enum dwarf_macro_record_type macinfo_type
;
24451 unsigned int offset_size
= cu
->header
.offset_size
;
24452 const gdb_byte
*opcode_definitions
[256];
24454 struct dwarf2_section_info
*section
;
24455 const char *section_name
;
24457 if (cu
->dwo_unit
!= NULL
)
24459 if (section_is_gnu
)
24461 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
24462 section_name
= ".debug_macro.dwo";
24466 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
24467 section_name
= ".debug_macinfo.dwo";
24472 if (section_is_gnu
)
24474 section
= &dwarf2_per_objfile
->macro
;
24475 section_name
= ".debug_macro";
24479 section
= &dwarf2_per_objfile
->macinfo
;
24480 section_name
= ".debug_macinfo";
24484 dwarf2_read_section (objfile
, section
);
24485 if (section
->buffer
== NULL
)
24487 complaint (_("missing %s section"), section_name
);
24490 abfd
= get_section_bfd_owner (section
);
24492 /* First pass: Find the name of the base filename.
24493 This filename is needed in order to process all macros whose definition
24494 (or undefinition) comes from the command line. These macros are defined
24495 before the first DW_MACINFO_start_file entry, and yet still need to be
24496 associated to the base file.
24498 To determine the base file name, we scan the macro definitions until we
24499 reach the first DW_MACINFO_start_file entry. We then initialize
24500 CURRENT_FILE accordingly so that any macro definition found before the
24501 first DW_MACINFO_start_file can still be associated to the base file. */
24503 mac_ptr
= section
->buffer
+ offset
;
24504 mac_end
= section
->buffer
+ section
->size
;
24506 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24507 &offset_size
, section_is_gnu
);
24508 if (mac_ptr
== NULL
)
24510 /* We already issued a complaint. */
24516 /* Do we at least have room for a macinfo type byte? */
24517 if (mac_ptr
>= mac_end
)
24519 /* Complaint is printed during the second pass as GDB will probably
24520 stop the first pass earlier upon finding
24521 DW_MACINFO_start_file. */
24525 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24528 /* Note that we rely on the fact that the corresponding GNU and
24529 DWARF constants are the same. */
24531 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24532 switch (macinfo_type
)
24534 /* A zero macinfo type indicates the end of the macro
24539 case DW_MACRO_define
:
24540 case DW_MACRO_undef
:
24541 /* Only skip the data by MAC_PTR. */
24543 unsigned int bytes_read
;
24545 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24546 mac_ptr
+= bytes_read
;
24547 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24548 mac_ptr
+= bytes_read
;
24552 case DW_MACRO_start_file
:
24554 unsigned int bytes_read
;
24557 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24558 mac_ptr
+= bytes_read
;
24559 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24560 mac_ptr
+= bytes_read
;
24562 current_file
= macro_start_file (cu
, file
, line
, current_file
, lh
);
24566 case DW_MACRO_end_file
:
24567 /* No data to skip by MAC_PTR. */
24570 case DW_MACRO_define_strp
:
24571 case DW_MACRO_undef_strp
:
24572 case DW_MACRO_define_sup
:
24573 case DW_MACRO_undef_sup
:
24575 unsigned int bytes_read
;
24577 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24578 mac_ptr
+= bytes_read
;
24579 mac_ptr
+= offset_size
;
24583 case DW_MACRO_import
:
24584 case DW_MACRO_import_sup
:
24585 /* Note that, according to the spec, a transparent include
24586 chain cannot call DW_MACRO_start_file. So, we can just
24587 skip this opcode. */
24588 mac_ptr
+= offset_size
;
24591 case DW_MACINFO_vendor_ext
:
24592 /* Only skip the data by MAC_PTR. */
24593 if (!section_is_gnu
)
24595 unsigned int bytes_read
;
24597 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24598 mac_ptr
+= bytes_read
;
24599 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24600 mac_ptr
+= bytes_read
;
24605 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24606 mac_ptr
, mac_end
, abfd
, offset_size
,
24608 if (mac_ptr
== NULL
)
24613 } while (macinfo_type
!= 0 && current_file
== NULL
);
24615 /* Second pass: Process all entries.
24617 Use the AT_COMMAND_LINE flag to determine whether we are still processing
24618 command-line macro definitions/undefinitions. This flag is unset when we
24619 reach the first DW_MACINFO_start_file entry. */
24621 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
24623 NULL
, xcalloc
, xfree
));
24624 mac_ptr
= section
->buffer
+ offset
;
24625 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
24626 *slot
= (void *) mac_ptr
;
24627 dwarf_decode_macro_bytes (cu
, abfd
, mac_ptr
, mac_end
,
24628 current_file
, lh
, section
,
24629 section_is_gnu
, 0, offset_size
,
24630 include_hash
.get ());
24633 /* Check if the attribute's form is a DW_FORM_block*
24634 if so return true else false. */
24637 attr_form_is_block (const struct attribute
*attr
)
24639 return (attr
== NULL
? 0 :
24640 attr
->form
== DW_FORM_block1
24641 || attr
->form
== DW_FORM_block2
24642 || attr
->form
== DW_FORM_block4
24643 || attr
->form
== DW_FORM_block
24644 || attr
->form
== DW_FORM_exprloc
);
24647 /* Return non-zero if ATTR's value is a section offset --- classes
24648 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
24649 You may use DW_UNSND (attr) to retrieve such offsets.
24651 Section 7.5.4, "Attribute Encodings", explains that no attribute
24652 may have a value that belongs to more than one of these classes; it
24653 would be ambiguous if we did, because we use the same forms for all
24657 attr_form_is_section_offset (const struct attribute
*attr
)
24659 return (attr
->form
== DW_FORM_data4
24660 || attr
->form
== DW_FORM_data8
24661 || attr
->form
== DW_FORM_sec_offset
);
24664 /* Return non-zero if ATTR's value falls in the 'constant' class, or
24665 zero otherwise. When this function returns true, you can apply
24666 dwarf2_get_attr_constant_value to it.
24668 However, note that for some attributes you must check
24669 attr_form_is_section_offset before using this test. DW_FORM_data4
24670 and DW_FORM_data8 are members of both the constant class, and of
24671 the classes that contain offsets into other debug sections
24672 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
24673 that, if an attribute's can be either a constant or one of the
24674 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
24675 taken as section offsets, not constants.
24677 DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
24678 cannot handle that. */
24681 attr_form_is_constant (const struct attribute
*attr
)
24683 switch (attr
->form
)
24685 case DW_FORM_sdata
:
24686 case DW_FORM_udata
:
24687 case DW_FORM_data1
:
24688 case DW_FORM_data2
:
24689 case DW_FORM_data4
:
24690 case DW_FORM_data8
:
24691 case DW_FORM_implicit_const
:
24699 /* DW_ADDR is always stored already as sect_offset; despite for the forms
24700 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
24703 attr_form_is_ref (const struct attribute
*attr
)
24705 switch (attr
->form
)
24707 case DW_FORM_ref_addr
:
24712 case DW_FORM_ref_udata
:
24713 case DW_FORM_GNU_ref_alt
:
24720 /* Return the .debug_loc section to use for CU.
24721 For DWO files use .debug_loc.dwo. */
24723 static struct dwarf2_section_info
*
24724 cu_debug_loc_section (struct dwarf2_cu
*cu
)
24726 struct dwarf2_per_objfile
*dwarf2_per_objfile
24727 = cu
->per_cu
->dwarf2_per_objfile
;
24731 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
24733 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
24735 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
24736 : &dwarf2_per_objfile
->loc
);
24739 /* A helper function that fills in a dwarf2_loclist_baton. */
24742 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
24743 struct dwarf2_loclist_baton
*baton
,
24744 const struct attribute
*attr
)
24746 struct dwarf2_per_objfile
*dwarf2_per_objfile
24747 = cu
->per_cu
->dwarf2_per_objfile
;
24748 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24750 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
24752 baton
->per_cu
= cu
->per_cu
;
24753 gdb_assert (baton
->per_cu
);
24754 /* We don't know how long the location list is, but make sure we
24755 don't run off the edge of the section. */
24756 baton
->size
= section
->size
- DW_UNSND (attr
);
24757 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
24758 baton
->base_address
= cu
->base_address
;
24759 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
24763 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
24764 struct dwarf2_cu
*cu
, int is_block
)
24766 struct dwarf2_per_objfile
*dwarf2_per_objfile
24767 = cu
->per_cu
->dwarf2_per_objfile
;
24768 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24769 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24771 if (attr_form_is_section_offset (attr
)
24772 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
24773 the section. If so, fall through to the complaint in the
24775 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
24777 struct dwarf2_loclist_baton
*baton
;
24779 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
24781 fill_in_loclist_baton (cu
, baton
, attr
);
24783 if (cu
->base_known
== 0)
24784 complaint (_("Location list used without "
24785 "specifying the CU base address."));
24787 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24788 ? dwarf2_loclist_block_index
24789 : dwarf2_loclist_index
);
24790 SYMBOL_LOCATION_BATON (sym
) = baton
;
24794 struct dwarf2_locexpr_baton
*baton
;
24796 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
24797 baton
->per_cu
= cu
->per_cu
;
24798 gdb_assert (baton
->per_cu
);
24800 if (attr_form_is_block (attr
))
24802 /* Note that we're just copying the block's data pointer
24803 here, not the actual data. We're still pointing into the
24804 info_buffer for SYM's objfile; right now we never release
24805 that buffer, but when we do clean up properly this may
24807 baton
->size
= DW_BLOCK (attr
)->size
;
24808 baton
->data
= DW_BLOCK (attr
)->data
;
24812 dwarf2_invalid_attrib_class_complaint ("location description",
24813 SYMBOL_NATURAL_NAME (sym
));
24817 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24818 ? dwarf2_locexpr_block_index
24819 : dwarf2_locexpr_index
);
24820 SYMBOL_LOCATION_BATON (sym
) = baton
;
24824 /* Return the OBJFILE associated with the compilation unit CU. If CU
24825 came from a separate debuginfo file, then the master objfile is
24829 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
24831 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24833 /* Return the master objfile, so that we can report and look up the
24834 correct file containing this variable. */
24835 if (objfile
->separate_debug_objfile_backlink
)
24836 objfile
= objfile
->separate_debug_objfile_backlink
;
24841 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
24842 (CU_HEADERP is unused in such case) or prepare a temporary copy at
24843 CU_HEADERP first. */
24845 static const struct comp_unit_head
*
24846 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
24847 struct dwarf2_per_cu_data
*per_cu
)
24849 const gdb_byte
*info_ptr
;
24852 return &per_cu
->cu
->header
;
24854 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
24856 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
24857 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
24858 rcuh_kind::COMPILE
);
24863 /* Return the address size given in the compilation unit header for CU. */
24866 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24868 struct comp_unit_head cu_header_local
;
24869 const struct comp_unit_head
*cu_headerp
;
24871 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24873 return cu_headerp
->addr_size
;
24876 /* Return the offset size given in the compilation unit header for CU. */
24879 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
24881 struct comp_unit_head cu_header_local
;
24882 const struct comp_unit_head
*cu_headerp
;
24884 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24886 return cu_headerp
->offset_size
;
24889 /* See its dwarf2loc.h declaration. */
24892 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24894 struct comp_unit_head cu_header_local
;
24895 const struct comp_unit_head
*cu_headerp
;
24897 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24899 if (cu_headerp
->version
== 2)
24900 return cu_headerp
->addr_size
;
24902 return cu_headerp
->offset_size
;
24905 /* Return the text offset of the CU. The returned offset comes from
24906 this CU's objfile. If this objfile came from a separate debuginfo
24907 file, then the offset may be different from the corresponding
24908 offset in the parent objfile. */
24911 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
24913 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24915 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
24918 /* Return DWARF version number of PER_CU. */
24921 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
24923 return per_cu
->dwarf_version
;
24926 /* Locate the .debug_info compilation unit from CU's objfile which contains
24927 the DIE at OFFSET. Raises an error on failure. */
24929 static struct dwarf2_per_cu_data
*
24930 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
24931 unsigned int offset_in_dwz
,
24932 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
24934 struct dwarf2_per_cu_data
*this_cu
;
24936 const sect_offset
*cu_off
;
24939 high
= dwarf2_per_objfile
->all_comp_units
.size () - 1;
24942 struct dwarf2_per_cu_data
*mid_cu
;
24943 int mid
= low
+ (high
- low
) / 2;
24945 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
24946 cu_off
= &mid_cu
->sect_off
;
24947 if (mid_cu
->is_dwz
> offset_in_dwz
24948 || (mid_cu
->is_dwz
== offset_in_dwz
&& *cu_off
>= sect_off
))
24953 gdb_assert (low
== high
);
24954 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
24955 cu_off
= &this_cu
->sect_off
;
24956 if (this_cu
->is_dwz
!= offset_in_dwz
|| *cu_off
> sect_off
)
24958 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
24959 error (_("Dwarf Error: could not find partial DIE containing "
24960 "offset %s [in module %s]"),
24961 sect_offset_str (sect_off
),
24962 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
24964 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
24966 return dwarf2_per_objfile
->all_comp_units
[low
-1];
24970 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
24971 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
24972 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
24973 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
24974 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
24979 /* Initialize dwarf2_cu CU, owned by PER_CU. */
24981 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
24982 : per_cu (per_cu_
),
24985 checked_producer (0),
24986 producer_is_gxx_lt_4_6 (0),
24987 producer_is_gcc_lt_4_3 (0),
24988 producer_is_icc_lt_14 (0),
24989 processing_has_namespace_info (0)
24994 /* Destroy a dwarf2_cu. */
24996 dwarf2_cu::~dwarf2_cu ()
25001 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
25004 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
25005 enum language pretend_language
)
25007 struct attribute
*attr
;
25009 /* Set the language we're debugging. */
25010 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
25012 set_cu_language (DW_UNSND (attr
), cu
);
25015 cu
->language
= pretend_language
;
25016 cu
->language_defn
= language_def (cu
->language
);
25019 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
25022 /* Increase the age counter on each cached compilation unit, and free
25023 any that are too old. */
25026 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25028 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25030 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
25031 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25032 while (per_cu
!= NULL
)
25034 per_cu
->cu
->last_used
++;
25035 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
25036 dwarf2_mark (per_cu
->cu
);
25037 per_cu
= per_cu
->cu
->read_in_chain
;
25040 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25041 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25042 while (per_cu
!= NULL
)
25044 struct dwarf2_per_cu_data
*next_cu
;
25046 next_cu
= per_cu
->cu
->read_in_chain
;
25048 if (!per_cu
->cu
->mark
)
25051 *last_chain
= next_cu
;
25054 last_chain
= &per_cu
->cu
->read_in_chain
;
25060 /* Remove a single compilation unit from the cache. */
25063 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
25065 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25066 struct dwarf2_per_objfile
*dwarf2_per_objfile
25067 = target_per_cu
->dwarf2_per_objfile
;
25069 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25070 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25071 while (per_cu
!= NULL
)
25073 struct dwarf2_per_cu_data
*next_cu
;
25075 next_cu
= per_cu
->cu
->read_in_chain
;
25077 if (per_cu
== target_per_cu
)
25081 *last_chain
= next_cu
;
25085 last_chain
= &per_cu
->cu
->read_in_chain
;
25091 /* Cleanup function for the dwarf2_per_objfile data. */
25094 dwarf2_free_objfile (struct objfile
*objfile
, void *datum
)
25096 struct dwarf2_per_objfile
*dwarf2_per_objfile
25097 = static_cast<struct dwarf2_per_objfile
*> (datum
);
25099 delete dwarf2_per_objfile
;
25102 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
25103 We store these in a hash table separate from the DIEs, and preserve them
25104 when the DIEs are flushed out of cache.
25106 The CU "per_cu" pointer is needed because offset alone is not enough to
25107 uniquely identify the type. A file may have multiple .debug_types sections,
25108 or the type may come from a DWO file. Furthermore, while it's more logical
25109 to use per_cu->section+offset, with Fission the section with the data is in
25110 the DWO file but we don't know that section at the point we need it.
25111 We have to use something in dwarf2_per_cu_data (or the pointer to it)
25112 because we can enter the lookup routine, get_die_type_at_offset, from
25113 outside this file, and thus won't necessarily have PER_CU->cu.
25114 Fortunately, PER_CU is stable for the life of the objfile. */
25116 struct dwarf2_per_cu_offset_and_type
25118 const struct dwarf2_per_cu_data
*per_cu
;
25119 sect_offset sect_off
;
25123 /* Hash function for a dwarf2_per_cu_offset_and_type. */
25126 per_cu_offset_and_type_hash (const void *item
)
25128 const struct dwarf2_per_cu_offset_and_type
*ofs
25129 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
25131 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
25134 /* Equality function for a dwarf2_per_cu_offset_and_type. */
25137 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
25139 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
25140 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
25141 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
25142 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
25144 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
25145 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
25148 /* Set the type associated with DIE to TYPE. Save it in CU's hash
25149 table if necessary. For convenience, return TYPE.
25151 The DIEs reading must have careful ordering to:
25152 * Not cause infite loops trying to read in DIEs as a prerequisite for
25153 reading current DIE.
25154 * Not trying to dereference contents of still incompletely read in types
25155 while reading in other DIEs.
25156 * Enable referencing still incompletely read in types just by a pointer to
25157 the type without accessing its fields.
25159 Therefore caller should follow these rules:
25160 * Try to fetch any prerequisite types we may need to build this DIE type
25161 before building the type and calling set_die_type.
25162 * After building type call set_die_type for current DIE as soon as
25163 possible before fetching more types to complete the current type.
25164 * Make the type as complete as possible before fetching more types. */
25166 static struct type
*
25167 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
25169 struct dwarf2_per_objfile
*dwarf2_per_objfile
25170 = cu
->per_cu
->dwarf2_per_objfile
;
25171 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
25172 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25173 struct attribute
*attr
;
25174 struct dynamic_prop prop
;
25176 /* For Ada types, make sure that the gnat-specific data is always
25177 initialized (if not already set). There are a few types where
25178 we should not be doing so, because the type-specific area is
25179 already used to hold some other piece of info (eg: TYPE_CODE_FLT
25180 where the type-specific area is used to store the floatformat).
25181 But this is not a problem, because the gnat-specific information
25182 is actually not needed for these types. */
25183 if (need_gnat_info (cu
)
25184 && TYPE_CODE (type
) != TYPE_CODE_FUNC
25185 && TYPE_CODE (type
) != TYPE_CODE_FLT
25186 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
25187 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
25188 && TYPE_CODE (type
) != TYPE_CODE_METHOD
25189 && !HAVE_GNAT_AUX_INFO (type
))
25190 INIT_GNAT_SPECIFIC (type
);
25192 /* Read DW_AT_allocated and set in type. */
25193 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
25194 if (attr_form_is_block (attr
))
25196 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25197 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
);
25199 else if (attr
!= NULL
)
25201 complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
25202 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25203 sect_offset_str (die
->sect_off
));
25206 /* Read DW_AT_associated and set in type. */
25207 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
25208 if (attr_form_is_block (attr
))
25210 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25211 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
);
25213 else if (attr
!= NULL
)
25215 complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
25216 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25217 sect_offset_str (die
->sect_off
));
25220 /* Read DW_AT_data_location and set in type. */
25221 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
25222 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25223 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
);
25225 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25227 dwarf2_per_objfile
->die_type_hash
=
25228 htab_create_alloc_ex (127,
25229 per_cu_offset_and_type_hash
,
25230 per_cu_offset_and_type_eq
,
25232 &objfile
->objfile_obstack
,
25233 hashtab_obstack_allocate
,
25234 dummy_obstack_deallocate
);
25237 ofs
.per_cu
= cu
->per_cu
;
25238 ofs
.sect_off
= die
->sect_off
;
25240 slot
= (struct dwarf2_per_cu_offset_and_type
**)
25241 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
25243 complaint (_("A problem internal to GDB: DIE %s has type already set"),
25244 sect_offset_str (die
->sect_off
));
25245 *slot
= XOBNEW (&objfile
->objfile_obstack
,
25246 struct dwarf2_per_cu_offset_and_type
);
25251 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
25252 or return NULL if the die does not have a saved type. */
25254 static struct type
*
25255 get_die_type_at_offset (sect_offset sect_off
,
25256 struct dwarf2_per_cu_data
*per_cu
)
25258 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
25259 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
25261 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25264 ofs
.per_cu
= per_cu
;
25265 ofs
.sect_off
= sect_off
;
25266 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
25267 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
25274 /* Look up the type for DIE in CU in die_type_hash,
25275 or return NULL if DIE does not have a saved type. */
25277 static struct type
*
25278 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
25280 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
25283 /* Add a dependence relationship from CU to REF_PER_CU. */
25286 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
25287 struct dwarf2_per_cu_data
*ref_per_cu
)
25291 if (cu
->dependencies
== NULL
)
25293 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
25294 NULL
, &cu
->comp_unit_obstack
,
25295 hashtab_obstack_allocate
,
25296 dummy_obstack_deallocate
);
25298 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
25300 *slot
= ref_per_cu
;
25303 /* Subroutine of dwarf2_mark to pass to htab_traverse.
25304 Set the mark field in every compilation unit in the
25305 cache that we must keep because we are keeping CU. */
25308 dwarf2_mark_helper (void **slot
, void *data
)
25310 struct dwarf2_per_cu_data
*per_cu
;
25312 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
25314 /* cu->dependencies references may not yet have been ever read if QUIT aborts
25315 reading of the chain. As such dependencies remain valid it is not much
25316 useful to track and undo them during QUIT cleanups. */
25317 if (per_cu
->cu
== NULL
)
25320 if (per_cu
->cu
->mark
)
25322 per_cu
->cu
->mark
= 1;
25324 if (per_cu
->cu
->dependencies
!= NULL
)
25325 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25330 /* Set the mark field in CU and in every other compilation unit in the
25331 cache that we must keep because we are keeping CU. */
25334 dwarf2_mark (struct dwarf2_cu
*cu
)
25339 if (cu
->dependencies
!= NULL
)
25340 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25344 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
25348 per_cu
->cu
->mark
= 0;
25349 per_cu
= per_cu
->cu
->read_in_chain
;
25353 /* Trivial hash function for partial_die_info: the hash value of a DIE
25354 is its offset in .debug_info for this objfile. */
25357 partial_die_hash (const void *item
)
25359 const struct partial_die_info
*part_die
25360 = (const struct partial_die_info
*) item
;
25362 return to_underlying (part_die
->sect_off
);
25365 /* Trivial comparison function for partial_die_info structures: two DIEs
25366 are equal if they have the same offset. */
25369 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
25371 const struct partial_die_info
*part_die_lhs
25372 = (const struct partial_die_info
*) item_lhs
;
25373 const struct partial_die_info
*part_die_rhs
25374 = (const struct partial_die_info
*) item_rhs
;
25376 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
25379 struct cmd_list_element
*set_dwarf_cmdlist
;
25380 struct cmd_list_element
*show_dwarf_cmdlist
;
25383 set_dwarf_cmd (const char *args
, int from_tty
)
25385 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
25390 show_dwarf_cmd (const char *args
, int from_tty
)
25392 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
25395 int dwarf_always_disassemble
;
25398 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
25399 struct cmd_list_element
*c
, const char *value
)
25401 fprintf_filtered (file
,
25402 _("Whether to always disassemble "
25403 "DWARF expressions is %s.\n"),
25408 show_check_physname (struct ui_file
*file
, int from_tty
,
25409 struct cmd_list_element
*c
, const char *value
)
25411 fprintf_filtered (file
,
25412 _("Whether to check \"physname\" is %s.\n"),
25417 _initialize_dwarf2_read (void)
25419 dwarf2_objfile_data_key
25420 = register_objfile_data_with_cleanup (nullptr, dwarf2_free_objfile
);
25422 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
25423 Set DWARF specific variables.\n\
25424 Configure DWARF variables such as the cache size"),
25425 &set_dwarf_cmdlist
, "maintenance set dwarf ",
25426 0/*allow-unknown*/, &maintenance_set_cmdlist
);
25428 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
25429 Show DWARF specific variables\n\
25430 Show DWARF variables such as the cache size"),
25431 &show_dwarf_cmdlist
, "maintenance show dwarf ",
25432 0/*allow-unknown*/, &maintenance_show_cmdlist
);
25434 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
25435 &dwarf_max_cache_age
, _("\
25436 Set the upper bound on the age of cached DWARF compilation units."), _("\
25437 Show the upper bound on the age of cached DWARF compilation units."), _("\
25438 A higher limit means that cached compilation units will be stored\n\
25439 in memory longer, and more total memory will be used. Zero disables\n\
25440 caching, which can slow down startup."),
25442 show_dwarf_max_cache_age
,
25443 &set_dwarf_cmdlist
,
25444 &show_dwarf_cmdlist
);
25446 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
25447 &dwarf_always_disassemble
, _("\
25448 Set whether `info address' always disassembles DWARF expressions."), _("\
25449 Show whether `info address' always disassembles DWARF expressions."), _("\
25450 When enabled, DWARF expressions are always printed in an assembly-like\n\
25451 syntax. When disabled, expressions will be printed in a more\n\
25452 conversational style, when possible."),
25454 show_dwarf_always_disassemble
,
25455 &set_dwarf_cmdlist
,
25456 &show_dwarf_cmdlist
);
25458 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
25459 Set debugging of the DWARF reader."), _("\
25460 Show debugging of the DWARF reader."), _("\
25461 When enabled (non-zero), debugging messages are printed during DWARF\n\
25462 reading and symtab expansion. A value of 1 (one) provides basic\n\
25463 information. A value greater than 1 provides more verbose information."),
25466 &setdebuglist
, &showdebuglist
);
25468 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
25469 Set debugging of the DWARF DIE reader."), _("\
25470 Show debugging of the DWARF DIE reader."), _("\
25471 When enabled (non-zero), DIEs are dumped after they are read in.\n\
25472 The value is the maximum depth to print."),
25475 &setdebuglist
, &showdebuglist
);
25477 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
25478 Set debugging of the dwarf line reader."), _("\
25479 Show debugging of the dwarf line reader."), _("\
25480 When enabled (non-zero), line number entries are dumped as they are read in.\n\
25481 A value of 1 (one) provides basic information.\n\
25482 A value greater than 1 provides more verbose information."),
25485 &setdebuglist
, &showdebuglist
);
25487 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
25488 Set cross-checking of \"physname\" code against demangler."), _("\
25489 Show cross-checking of \"physname\" code against demangler."), _("\
25490 When enabled, GDB's internal \"physname\" code is checked against\n\
25492 NULL
, show_check_physname
,
25493 &setdebuglist
, &showdebuglist
);
25495 add_setshow_boolean_cmd ("use-deprecated-index-sections",
25496 no_class
, &use_deprecated_index_sections
, _("\
25497 Set whether to use deprecated gdb_index sections."), _("\
25498 Show whether to use deprecated gdb_index sections."), _("\
25499 When enabled, deprecated .gdb_index sections are used anyway.\n\
25500 Normally they are ignored either because of a missing feature or\n\
25501 performance issue.\n\
25502 Warning: This option must be enabled before gdb reads the file."),
25505 &setlist
, &showlist
);
25507 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25508 &dwarf2_locexpr_funcs
);
25509 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25510 &dwarf2_loclist_funcs
);
25512 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25513 &dwarf2_block_frame_base_locexpr_funcs
);
25514 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25515 &dwarf2_block_frame_base_loclist_funcs
);
25518 selftests::register_test ("dw2_expand_symtabs_matching",
25519 selftests::dw2_expand_symtabs_matching::run_test
);