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 generic symbol table building routines have separate lists for
439 file scope symbols and all all other scopes (local scopes). So
440 we need to select the right one to pass to add_symbol_to_list().
441 We do it by keeping a pointer to the correct list in list_in_scope.
443 FIXME: The original dwarf code just treated the file scope as the
444 first local scope, and all other local scopes as nested local
445 scopes, and worked fine. Check to see if we really need to
446 distinguish these in buildsym.c. */
447 struct pending
**list_in_scope
= nullptr;
449 /* Hash table holding all the loaded partial DIEs
450 with partial_die->offset.SECT_OFF as hash. */
451 htab_t partial_dies
= nullptr;
453 /* Storage for things with the same lifetime as this read-in compilation
454 unit, including partial DIEs. */
455 auto_obstack comp_unit_obstack
;
457 /* When multiple dwarf2_cu structures are living in memory, this field
458 chains them all together, so that they can be released efficiently.
459 We will probably also want a generation counter so that most-recently-used
460 compilation units are cached... */
461 struct dwarf2_per_cu_data
*read_in_chain
= nullptr;
463 /* Backlink to our per_cu entry. */
464 struct dwarf2_per_cu_data
*per_cu
;
466 /* How many compilation units ago was this CU last referenced? */
469 /* A hash table of DIE cu_offset for following references with
470 die_info->offset.sect_off as hash. */
471 htab_t die_hash
= nullptr;
473 /* Full DIEs if read in. */
474 struct die_info
*dies
= nullptr;
476 /* A set of pointers to dwarf2_per_cu_data objects for compilation
477 units referenced by this one. Only set during full symbol processing;
478 partial symbol tables do not have dependencies. */
479 htab_t dependencies
= nullptr;
481 /* Header data from the line table, during full symbol processing. */
482 struct line_header
*line_header
= nullptr;
483 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
484 it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL,
485 this is the DW_TAG_compile_unit die for this CU. We'll hold on
486 to the line header as long as this DIE is being processed. See
487 process_die_scope. */
488 die_info
*line_header_die_owner
= nullptr;
490 /* A list of methods which need to have physnames computed
491 after all type information has been read. */
492 std::vector
<delayed_method_info
> method_list
;
494 /* To be copied to symtab->call_site_htab. */
495 htab_t call_site_htab
= nullptr;
497 /* Non-NULL if this CU came from a DWO file.
498 There is an invariant here that is important to remember:
499 Except for attributes copied from the top level DIE in the "main"
500 (or "stub") file in preparation for reading the DWO file
501 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
502 Either there isn't a DWO file (in which case this is NULL and the point
503 is moot), or there is and either we're not going to read it (in which
504 case this is NULL) or there is and we are reading it (in which case this
506 struct dwo_unit
*dwo_unit
= nullptr;
508 /* The DW_AT_addr_base attribute if present, zero otherwise
509 (zero is a valid value though).
510 Note this value comes from the Fission stub CU/TU's DIE. */
511 ULONGEST addr_base
= 0;
513 /* The DW_AT_ranges_base attribute if present, zero otherwise
514 (zero is a valid value though).
515 Note this value comes from the Fission stub CU/TU's DIE.
516 Also note that the value is zero in the non-DWO case so this value can
517 be used without needing to know whether DWO files are in use or not.
518 N.B. This does not apply to DW_AT_ranges appearing in
519 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
520 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
521 DW_AT_ranges_base *would* have to be applied, and we'd have to care
522 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
523 ULONGEST ranges_base
= 0;
525 /* When reading debug info generated by older versions of rustc, we
526 have to rewrite some union types to be struct types with a
527 variant part. This rewriting must be done after the CU is fully
528 read in, because otherwise at the point of rewriting some struct
529 type might not have been fully processed. So, we keep a list of
530 all such types here and process them after expansion. */
531 std::vector
<struct type
*> rust_unions
;
533 /* Mark used when releasing cached dies. */
534 unsigned int mark
: 1;
536 /* This CU references .debug_loc. See the symtab->locations_valid field.
537 This test is imperfect as there may exist optimized debug code not using
538 any location list and still facing inlining issues if handled as
539 unoptimized code. For a future better test see GCC PR other/32998. */
540 unsigned int has_loclist
: 1;
542 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
543 if all the producer_is_* fields are valid. This information is cached
544 because profiling CU expansion showed excessive time spent in
545 producer_is_gxx_lt_4_6. */
546 unsigned int checked_producer
: 1;
547 unsigned int producer_is_gxx_lt_4_6
: 1;
548 unsigned int producer_is_gcc_lt_4_3
: 1;
549 unsigned int producer_is_icc_lt_14
: 1;
551 /* When set, the file that we're processing is known to have
552 debugging info for C++ namespaces. GCC 3.3.x did not produce
553 this information, but later versions do. */
555 unsigned int processing_has_namespace_info
: 1;
557 struct partial_die_info
*find_partial_die (sect_offset sect_off
);
560 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
561 This includes type_unit_group and quick_file_names. */
563 struct stmt_list_hash
565 /* The DWO unit this table is from or NULL if there is none. */
566 struct dwo_unit
*dwo_unit
;
568 /* Offset in .debug_line or .debug_line.dwo. */
569 sect_offset line_sect_off
;
572 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
573 an object of this type. */
575 struct type_unit_group
577 /* dwarf2read.c's main "handle" on a TU symtab.
578 To simplify things we create an artificial CU that "includes" all the
579 type units using this stmt_list so that the rest of the code still has
580 a "per_cu" handle on the symtab.
581 This PER_CU is recognized by having no section. */
582 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
583 struct dwarf2_per_cu_data per_cu
;
585 /* The TUs that share this DW_AT_stmt_list entry.
586 This is added to while parsing type units to build partial symtabs,
587 and is deleted afterwards and not used again. */
588 VEC (sig_type_ptr
) *tus
;
590 /* The compunit symtab.
591 Type units in a group needn't all be defined in the same source file,
592 so we create an essentially anonymous symtab as the compunit symtab. */
593 struct compunit_symtab
*compunit_symtab
;
595 /* The data used to construct the hash key. */
596 struct stmt_list_hash hash
;
598 /* The number of symtabs from the line header.
599 The value here must match line_header.num_file_names. */
600 unsigned int num_symtabs
;
602 /* The symbol tables for this TU (obtained from the files listed in
604 WARNING: The order of entries here must match the order of entries
605 in the line header. After the first TU using this type_unit_group, the
606 line header for the subsequent TUs is recreated from this. This is done
607 because we need to use the same symtabs for each TU using the same
608 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
609 there's no guarantee the line header doesn't have duplicate entries. */
610 struct symtab
**symtabs
;
613 /* These sections are what may appear in a (real or virtual) DWO file. */
617 struct dwarf2_section_info abbrev
;
618 struct dwarf2_section_info line
;
619 struct dwarf2_section_info loc
;
620 struct dwarf2_section_info loclists
;
621 struct dwarf2_section_info macinfo
;
622 struct dwarf2_section_info macro
;
623 struct dwarf2_section_info str
;
624 struct dwarf2_section_info str_offsets
;
625 /* In the case of a virtual DWO file, these two are unused. */
626 struct dwarf2_section_info info
;
627 VEC (dwarf2_section_info_def
) *types
;
630 /* CUs/TUs in DWP/DWO files. */
634 /* Backlink to the containing struct dwo_file. */
635 struct dwo_file
*dwo_file
;
637 /* The "id" that distinguishes this CU/TU.
638 .debug_info calls this "dwo_id", .debug_types calls this "signature".
639 Since signatures came first, we stick with it for consistency. */
642 /* The section this CU/TU lives in, in the DWO file. */
643 struct dwarf2_section_info
*section
;
645 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
646 sect_offset sect_off
;
649 /* For types, offset in the type's DIE of the type defined by this TU. */
650 cu_offset type_offset_in_tu
;
653 /* include/dwarf2.h defines the DWP section codes.
654 It defines a max value but it doesn't define a min value, which we
655 use for error checking, so provide one. */
657 enum dwp_v2_section_ids
662 /* Data for one DWO file.
664 This includes virtual DWO files (a virtual DWO file is a DWO file as it
665 appears in a DWP file). DWP files don't really have DWO files per se -
666 comdat folding of types "loses" the DWO file they came from, and from
667 a high level view DWP files appear to contain a mass of random types.
668 However, to maintain consistency with the non-DWP case we pretend DWP
669 files contain virtual DWO files, and we assign each TU with one virtual
670 DWO file (generally based on the line and abbrev section offsets -
671 a heuristic that seems to work in practice). */
675 /* The DW_AT_GNU_dwo_name attribute.
676 For virtual DWO files the name is constructed from the section offsets
677 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
678 from related CU+TUs. */
679 const char *dwo_name
;
681 /* The DW_AT_comp_dir attribute. */
682 const char *comp_dir
;
684 /* The bfd, when the file is open. Otherwise this is NULL.
685 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
688 /* The sections that make up this DWO file.
689 Remember that for virtual DWO files in DWP V2, these are virtual
690 sections (for lack of a better name). */
691 struct dwo_sections sections
;
693 /* The CUs in the file.
694 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
695 an extension to handle LLVM's Link Time Optimization output (where
696 multiple source files may be compiled into a single object/dwo pair). */
699 /* Table of TUs in the file.
700 Each element is a struct dwo_unit. */
704 /* These sections are what may appear in a DWP file. */
708 /* These are used by both DWP version 1 and 2. */
709 struct dwarf2_section_info str
;
710 struct dwarf2_section_info cu_index
;
711 struct dwarf2_section_info tu_index
;
713 /* These are only used by DWP version 2 files.
714 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
715 sections are referenced by section number, and are not recorded here.
716 In DWP version 2 there is at most one copy of all these sections, each
717 section being (effectively) comprised of the concatenation of all of the
718 individual sections that exist in the version 1 format.
719 To keep the code simple we treat each of these concatenated pieces as a
720 section itself (a virtual section?). */
721 struct dwarf2_section_info abbrev
;
722 struct dwarf2_section_info info
;
723 struct dwarf2_section_info line
;
724 struct dwarf2_section_info loc
;
725 struct dwarf2_section_info macinfo
;
726 struct dwarf2_section_info macro
;
727 struct dwarf2_section_info str_offsets
;
728 struct dwarf2_section_info types
;
731 /* These sections are what may appear in a virtual DWO file in DWP version 1.
732 A virtual DWO file is a DWO file as it appears in a DWP file. */
734 struct virtual_v1_dwo_sections
736 struct dwarf2_section_info abbrev
;
737 struct dwarf2_section_info line
;
738 struct dwarf2_section_info loc
;
739 struct dwarf2_section_info macinfo
;
740 struct dwarf2_section_info macro
;
741 struct dwarf2_section_info str_offsets
;
742 /* Each DWP hash table entry records one CU or one TU.
743 That is recorded here, and copied to dwo_unit.section. */
744 struct dwarf2_section_info info_or_types
;
747 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
748 In version 2, the sections of the DWO files are concatenated together
749 and stored in one section of that name. Thus each ELF section contains
750 several "virtual" sections. */
752 struct virtual_v2_dwo_sections
754 bfd_size_type abbrev_offset
;
755 bfd_size_type abbrev_size
;
757 bfd_size_type line_offset
;
758 bfd_size_type line_size
;
760 bfd_size_type loc_offset
;
761 bfd_size_type loc_size
;
763 bfd_size_type macinfo_offset
;
764 bfd_size_type macinfo_size
;
766 bfd_size_type macro_offset
;
767 bfd_size_type macro_size
;
769 bfd_size_type str_offsets_offset
;
770 bfd_size_type str_offsets_size
;
772 /* Each DWP hash table entry records one CU or one TU.
773 That is recorded here, and copied to dwo_unit.section. */
774 bfd_size_type info_or_types_offset
;
775 bfd_size_type info_or_types_size
;
778 /* Contents of DWP hash tables. */
780 struct dwp_hash_table
782 uint32_t version
, nr_columns
;
783 uint32_t nr_units
, nr_slots
;
784 const gdb_byte
*hash_table
, *unit_table
;
789 const gdb_byte
*indices
;
793 /* This is indexed by column number and gives the id of the section
795 #define MAX_NR_V2_DWO_SECTIONS \
796 (1 /* .debug_info or .debug_types */ \
797 + 1 /* .debug_abbrev */ \
798 + 1 /* .debug_line */ \
799 + 1 /* .debug_loc */ \
800 + 1 /* .debug_str_offsets */ \
801 + 1 /* .debug_macro or .debug_macinfo */)
802 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
803 const gdb_byte
*offsets
;
804 const gdb_byte
*sizes
;
809 /* Data for one DWP file. */
813 dwp_file (const char *name_
, gdb_bfd_ref_ptr
&&abfd
)
815 dbfd (std::move (abfd
))
819 /* Name of the file. */
822 /* File format version. */
826 gdb_bfd_ref_ptr dbfd
;
828 /* Section info for this file. */
829 struct dwp_sections sections
{};
831 /* Table of CUs in the file. */
832 const struct dwp_hash_table
*cus
= nullptr;
834 /* Table of TUs in the file. */
835 const struct dwp_hash_table
*tus
= nullptr;
837 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
838 htab_t loaded_cus
{};
839 htab_t loaded_tus
{};
841 /* Table to map ELF section numbers to their sections.
842 This is only needed for the DWP V1 file format. */
843 unsigned int num_sections
= 0;
844 asection
**elf_sections
= nullptr;
847 /* This represents a '.dwz' file. */
851 dwz_file (gdb_bfd_ref_ptr
&&bfd
)
852 : dwz_bfd (std::move (bfd
))
856 /* A dwz file can only contain a few sections. */
857 struct dwarf2_section_info abbrev
{};
858 struct dwarf2_section_info info
{};
859 struct dwarf2_section_info str
{};
860 struct dwarf2_section_info line
{};
861 struct dwarf2_section_info macro
{};
862 struct dwarf2_section_info gdb_index
{};
863 struct dwarf2_section_info debug_names
{};
866 gdb_bfd_ref_ptr dwz_bfd
;
869 /* Struct used to pass misc. parameters to read_die_and_children, et
870 al. which are used for both .debug_info and .debug_types dies.
871 All parameters here are unchanging for the life of the call. This
872 struct exists to abstract away the constant parameters of die reading. */
874 struct die_reader_specs
876 /* The bfd of die_section. */
879 /* The CU of the DIE we are parsing. */
880 struct dwarf2_cu
*cu
;
882 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
883 struct dwo_file
*dwo_file
;
885 /* The section the die comes from.
886 This is either .debug_info or .debug_types, or the .dwo variants. */
887 struct dwarf2_section_info
*die_section
;
889 /* die_section->buffer. */
890 const gdb_byte
*buffer
;
892 /* The end of the buffer. */
893 const gdb_byte
*buffer_end
;
895 /* The value of the DW_AT_comp_dir attribute. */
896 const char *comp_dir
;
898 /* The abbreviation table to use when reading the DIEs. */
899 struct abbrev_table
*abbrev_table
;
902 /* Type of function passed to init_cutu_and_read_dies, et.al. */
903 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
904 const gdb_byte
*info_ptr
,
905 struct die_info
*comp_unit_die
,
909 /* A 1-based directory index. This is a strong typedef to prevent
910 accidentally using a directory index as a 0-based index into an
912 enum class dir_index
: unsigned int {};
914 /* Likewise, a 1-based file name index. */
915 enum class file_name_index
: unsigned int {};
919 file_entry () = default;
921 file_entry (const char *name_
, dir_index d_index_
,
922 unsigned int mod_time_
, unsigned int length_
)
925 mod_time (mod_time_
),
929 /* Return the include directory at D_INDEX stored in LH. Returns
930 NULL if D_INDEX is out of bounds. */
931 const char *include_dir (const line_header
*lh
) const;
933 /* The file name. Note this is an observing pointer. The memory is
934 owned by debug_line_buffer. */
937 /* The directory index (1-based). */
938 dir_index d_index
{};
940 unsigned int mod_time
{};
942 unsigned int length
{};
944 /* True if referenced by the Line Number Program. */
947 /* The associated symbol table, if any. */
948 struct symtab
*symtab
{};
951 /* The line number information for a compilation unit (found in the
952 .debug_line section) begins with a "statement program header",
953 which contains the following information. */
960 /* Add an entry to the include directory table. */
961 void add_include_dir (const char *include_dir
);
963 /* Add an entry to the file name table. */
964 void add_file_name (const char *name
, dir_index d_index
,
965 unsigned int mod_time
, unsigned int length
);
967 /* Return the include dir at INDEX (1-based). Returns NULL if INDEX
969 const char *include_dir_at (dir_index index
) const
971 /* Convert directory index number (1-based) to vector index
973 size_t vec_index
= to_underlying (index
) - 1;
975 if (vec_index
>= include_dirs
.size ())
977 return include_dirs
[vec_index
];
980 /* Return the file name at INDEX (1-based). Returns NULL if INDEX
982 file_entry
*file_name_at (file_name_index index
)
984 /* Convert file name index number (1-based) to vector index
986 size_t vec_index
= to_underlying (index
) - 1;
988 if (vec_index
>= file_names
.size ())
990 return &file_names
[vec_index
];
993 /* Const version of the above. */
994 const file_entry
*file_name_at (unsigned int index
) const
996 if (index
>= file_names
.size ())
998 return &file_names
[index
];
1001 /* Offset of line number information in .debug_line section. */
1002 sect_offset sect_off
{};
1004 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1005 unsigned offset_in_dwz
: 1; /* Can't initialize bitfields in-class. */
1007 unsigned int total_length
{};
1008 unsigned short version
{};
1009 unsigned int header_length
{};
1010 unsigned char minimum_instruction_length
{};
1011 unsigned char maximum_ops_per_instruction
{};
1012 unsigned char default_is_stmt
{};
1014 unsigned char line_range
{};
1015 unsigned char opcode_base
{};
1017 /* standard_opcode_lengths[i] is the number of operands for the
1018 standard opcode whose value is i. This means that
1019 standard_opcode_lengths[0] is unused, and the last meaningful
1020 element is standard_opcode_lengths[opcode_base - 1]. */
1021 std::unique_ptr
<unsigned char[]> standard_opcode_lengths
;
1023 /* The include_directories table. Note these are observing
1024 pointers. The memory is owned by debug_line_buffer. */
1025 std::vector
<const char *> include_dirs
;
1027 /* The file_names table. */
1028 std::vector
<file_entry
> file_names
;
1030 /* The start and end of the statement program following this
1031 header. These point into dwarf2_per_objfile->line_buffer. */
1032 const gdb_byte
*statement_program_start
{}, *statement_program_end
{};
1035 typedef std::unique_ptr
<line_header
> line_header_up
;
1038 file_entry::include_dir (const line_header
*lh
) const
1040 return lh
->include_dir_at (d_index
);
1043 /* When we construct a partial symbol table entry we only
1044 need this much information. */
1045 struct partial_die_info
: public allocate_on_obstack
1047 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
1049 /* Disable assign but still keep copy ctor, which is needed
1050 load_partial_dies. */
1051 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
1053 /* Adjust the partial die before generating a symbol for it. This
1054 function may set the is_external flag or change the DIE's
1056 void fixup (struct dwarf2_cu
*cu
);
1058 /* Read a minimal amount of information into the minimal die
1060 const gdb_byte
*read (const struct die_reader_specs
*reader
,
1061 const struct abbrev_info
&abbrev
,
1062 const gdb_byte
*info_ptr
);
1064 /* Offset of this DIE. */
1065 const sect_offset sect_off
;
1067 /* DWARF-2 tag for this DIE. */
1068 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1070 /* Assorted flags describing the data found in this DIE. */
1071 const unsigned int has_children
: 1;
1073 unsigned int is_external
: 1;
1074 unsigned int is_declaration
: 1;
1075 unsigned int has_type
: 1;
1076 unsigned int has_specification
: 1;
1077 unsigned int has_pc_info
: 1;
1078 unsigned int may_be_inlined
: 1;
1080 /* This DIE has been marked DW_AT_main_subprogram. */
1081 unsigned int main_subprogram
: 1;
1083 /* Flag set if the SCOPE field of this structure has been
1085 unsigned int scope_set
: 1;
1087 /* Flag set if the DIE has a byte_size attribute. */
1088 unsigned int has_byte_size
: 1;
1090 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1091 unsigned int has_const_value
: 1;
1093 /* Flag set if any of the DIE's children are template arguments. */
1094 unsigned int has_template_arguments
: 1;
1096 /* Flag set if fixup has been called on this die. */
1097 unsigned int fixup_called
: 1;
1099 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1100 unsigned int is_dwz
: 1;
1102 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1103 unsigned int spec_is_dwz
: 1;
1105 /* The name of this DIE. Normally the value of DW_AT_name, but
1106 sometimes a default name for unnamed DIEs. */
1107 const char *name
= nullptr;
1109 /* The linkage name, if present. */
1110 const char *linkage_name
= nullptr;
1112 /* The scope to prepend to our children. This is generally
1113 allocated on the comp_unit_obstack, so will disappear
1114 when this compilation unit leaves the cache. */
1115 const char *scope
= nullptr;
1117 /* Some data associated with the partial DIE. The tag determines
1118 which field is live. */
1121 /* The location description associated with this DIE, if any. */
1122 struct dwarf_block
*locdesc
;
1123 /* The offset of an import, for DW_TAG_imported_unit. */
1124 sect_offset sect_off
;
1127 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1128 CORE_ADDR lowpc
= 0;
1129 CORE_ADDR highpc
= 0;
1131 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1132 DW_AT_sibling, if any. */
1133 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1134 could return DW_AT_sibling values to its caller load_partial_dies. */
1135 const gdb_byte
*sibling
= nullptr;
1137 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1138 DW_AT_specification (or DW_AT_abstract_origin or
1139 DW_AT_extension). */
1140 sect_offset spec_offset
{};
1142 /* Pointers to this DIE's parent, first child, and next sibling,
1144 struct partial_die_info
*die_parent
= nullptr;
1145 struct partial_die_info
*die_child
= nullptr;
1146 struct partial_die_info
*die_sibling
= nullptr;
1148 friend struct partial_die_info
*
1149 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1152 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1153 partial_die_info (sect_offset sect_off
)
1154 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1158 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1160 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1165 has_specification
= 0;
1168 main_subprogram
= 0;
1171 has_const_value
= 0;
1172 has_template_arguments
= 0;
1179 /* This data structure holds the information of an abbrev. */
1182 unsigned int number
; /* number identifying abbrev */
1183 enum dwarf_tag tag
; /* dwarf tag */
1184 unsigned short has_children
; /* boolean */
1185 unsigned short num_attrs
; /* number of attributes */
1186 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1187 struct abbrev_info
*next
; /* next in chain */
1192 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1193 ENUM_BITFIELD(dwarf_form
) form
: 16;
1195 /* It is valid only if FORM is DW_FORM_implicit_const. */
1196 LONGEST implicit_const
;
1199 /* Size of abbrev_table.abbrev_hash_table. */
1200 #define ABBREV_HASH_SIZE 121
1202 /* Top level data structure to contain an abbreviation table. */
1206 explicit abbrev_table (sect_offset off
)
1210 XOBNEWVEC (&abbrev_obstack
, struct abbrev_info
*, ABBREV_HASH_SIZE
);
1211 memset (m_abbrevs
, 0, ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
1214 DISABLE_COPY_AND_ASSIGN (abbrev_table
);
1216 /* Allocate space for a struct abbrev_info object in
1218 struct abbrev_info
*alloc_abbrev ();
1220 /* Add an abbreviation to the table. */
1221 void add_abbrev (unsigned int abbrev_number
, struct abbrev_info
*abbrev
);
1223 /* Look up an abbrev in the table.
1224 Returns NULL if the abbrev is not found. */
1226 struct abbrev_info
*lookup_abbrev (unsigned int abbrev_number
);
1229 /* Where the abbrev table came from.
1230 This is used as a sanity check when the table is used. */
1231 const sect_offset sect_off
;
1233 /* Storage for the abbrev table. */
1234 auto_obstack abbrev_obstack
;
1238 /* Hash table of abbrevs.
1239 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1240 It could be statically allocated, but the previous code didn't so we
1242 struct abbrev_info
**m_abbrevs
;
1245 typedef std::unique_ptr
<struct abbrev_table
> abbrev_table_up
;
1247 /* Attributes have a name and a value. */
1250 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1251 ENUM_BITFIELD(dwarf_form
) form
: 15;
1253 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1254 field should be in u.str (existing only for DW_STRING) but it is kept
1255 here for better struct attribute alignment. */
1256 unsigned int string_is_canonical
: 1;
1261 struct dwarf_block
*blk
;
1270 /* This data structure holds a complete die structure. */
1273 /* DWARF-2 tag for this DIE. */
1274 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1276 /* Number of attributes */
1277 unsigned char num_attrs
;
1279 /* True if we're presently building the full type name for the
1280 type derived from this DIE. */
1281 unsigned char building_fullname
: 1;
1283 /* True if this die is in process. PR 16581. */
1284 unsigned char in_process
: 1;
1287 unsigned int abbrev
;
1289 /* Offset in .debug_info or .debug_types section. */
1290 sect_offset sect_off
;
1292 /* The dies in a compilation unit form an n-ary tree. PARENT
1293 points to this die's parent; CHILD points to the first child of
1294 this node; and all the children of a given node are chained
1295 together via their SIBLING fields. */
1296 struct die_info
*child
; /* Its first child, if any. */
1297 struct die_info
*sibling
; /* Its next sibling, if any. */
1298 struct die_info
*parent
; /* Its parent, if any. */
1300 /* An array of attributes, with NUM_ATTRS elements. There may be
1301 zero, but it's not common and zero-sized arrays are not
1302 sufficiently portable C. */
1303 struct attribute attrs
[1];
1306 /* Get at parts of an attribute structure. */
1308 #define DW_STRING(attr) ((attr)->u.str)
1309 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1310 #define DW_UNSND(attr) ((attr)->u.unsnd)
1311 #define DW_BLOCK(attr) ((attr)->u.blk)
1312 #define DW_SND(attr) ((attr)->u.snd)
1313 #define DW_ADDR(attr) ((attr)->u.addr)
1314 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1316 /* Blocks are a bunch of untyped bytes. */
1321 /* Valid only if SIZE is not zero. */
1322 const gdb_byte
*data
;
1325 #ifndef ATTR_ALLOC_CHUNK
1326 #define ATTR_ALLOC_CHUNK 4
1329 /* Allocate fields for structs, unions and enums in this size. */
1330 #ifndef DW_FIELD_ALLOC_CHUNK
1331 #define DW_FIELD_ALLOC_CHUNK 4
1334 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1335 but this would require a corresponding change in unpack_field_as_long
1337 static int bits_per_byte
= 8;
1339 /* When reading a variant or variant part, we track a bit more
1340 information about the field, and store it in an object of this
1343 struct variant_field
1345 /* If we see a DW_TAG_variant, then this will be the discriminant
1347 ULONGEST discriminant_value
;
1348 /* If we see a DW_TAG_variant, then this will be set if this is the
1350 bool default_branch
;
1351 /* While reading a DW_TAG_variant_part, this will be set if this
1352 field is the discriminant. */
1353 bool is_discriminant
;
1358 int accessibility
= 0;
1360 /* Extra information to describe a variant or variant part. */
1361 struct variant_field variant
{};
1362 struct field field
{};
1367 const char *name
= nullptr;
1368 std::vector
<struct fn_field
> fnfields
;
1371 /* The routines that read and process dies for a C struct or C++ class
1372 pass lists of data member fields and lists of member function fields
1373 in an instance of a field_info structure, as defined below. */
1376 /* List of data member and baseclasses fields. */
1377 std::vector
<struct nextfield
> fields
;
1378 std::vector
<struct nextfield
> baseclasses
;
1380 /* Number of fields (including baseclasses). */
1383 /* Set if the accesibility of one of the fields is not public. */
1384 int non_public_fields
= 0;
1386 /* Member function fieldlist array, contains name of possibly overloaded
1387 member function, number of overloaded member functions and a pointer
1388 to the head of the member function field chain. */
1389 std::vector
<struct fnfieldlist
> fnfieldlists
;
1391 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1392 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1393 std::vector
<struct decl_field
> typedef_field_list
;
1395 /* Nested types defined by this class and the number of elements in this
1397 std::vector
<struct decl_field
> nested_types_list
;
1400 /* One item on the queue of compilation units to read in full symbols
1402 struct dwarf2_queue_item
1404 struct dwarf2_per_cu_data
*per_cu
;
1405 enum language pretend_language
;
1406 struct dwarf2_queue_item
*next
;
1409 /* The current queue. */
1410 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1412 /* Loaded secondary compilation units are kept in memory until they
1413 have not been referenced for the processing of this many
1414 compilation units. Set this to zero to disable caching. Cache
1415 sizes of up to at least twenty will improve startup time for
1416 typical inter-CU-reference binaries, at an obvious memory cost. */
1417 static int dwarf_max_cache_age
= 5;
1419 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1420 struct cmd_list_element
*c
, const char *value
)
1422 fprintf_filtered (file
, _("The upper bound on the age of cached "
1423 "DWARF compilation units is %s.\n"),
1427 /* local function prototypes */
1429 static const char *get_section_name (const struct dwarf2_section_info
*);
1431 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1433 static void dwarf2_find_base_address (struct die_info
*die
,
1434 struct dwarf2_cu
*cu
);
1436 static struct partial_symtab
*create_partial_symtab
1437 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1439 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1440 const gdb_byte
*info_ptr
,
1441 struct die_info
*type_unit_die
,
1442 int has_children
, void *data
);
1444 static void dwarf2_build_psymtabs_hard
1445 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1447 static void scan_partial_symbols (struct partial_die_info
*,
1448 CORE_ADDR
*, CORE_ADDR
*,
1449 int, struct dwarf2_cu
*);
1451 static void add_partial_symbol (struct partial_die_info
*,
1452 struct dwarf2_cu
*);
1454 static void add_partial_namespace (struct partial_die_info
*pdi
,
1455 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1456 int set_addrmap
, struct dwarf2_cu
*cu
);
1458 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1459 CORE_ADDR
*highpc
, int set_addrmap
,
1460 struct dwarf2_cu
*cu
);
1462 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1463 struct dwarf2_cu
*cu
);
1465 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1466 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1467 int need_pc
, struct dwarf2_cu
*cu
);
1469 static void dwarf2_read_symtab (struct partial_symtab
*,
1472 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1474 static abbrev_table_up abbrev_table_read_table
1475 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, struct dwarf2_section_info
*,
1478 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1480 static struct partial_die_info
*load_partial_dies
1481 (const struct die_reader_specs
*, const gdb_byte
*, int);
1483 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1484 struct dwarf2_cu
*);
1486 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1487 struct attribute
*, struct attr_abbrev
*,
1490 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1492 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1494 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1496 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1498 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1500 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1503 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1505 static LONGEST read_checked_initial_length_and_offset
1506 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1507 unsigned int *, unsigned int *);
1509 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1510 const struct comp_unit_head
*,
1513 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1515 static sect_offset read_abbrev_offset
1516 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1517 struct dwarf2_section_info
*, sect_offset
);
1519 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1521 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1523 static const char *read_indirect_string
1524 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1525 const struct comp_unit_head
*, unsigned int *);
1527 static const char *read_indirect_line_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_string_at_offset
1532 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
1533 LONGEST str_offset
);
1535 static const char *read_indirect_string_from_dwz
1536 (struct objfile
*objfile
, struct dwz_file
*, LONGEST
);
1538 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1540 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1544 static const char *read_str_index (const struct die_reader_specs
*reader
,
1545 ULONGEST str_index
);
1547 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1549 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1550 struct dwarf2_cu
*);
1552 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1555 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1556 struct dwarf2_cu
*cu
);
1558 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1559 struct dwarf2_cu
*cu
);
1561 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1563 static struct die_info
*die_specification (struct die_info
*die
,
1564 struct dwarf2_cu
**);
1566 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1567 struct dwarf2_cu
*cu
);
1569 static void dwarf_decode_lines (struct line_header
*, const char *,
1570 struct dwarf2_cu
*, struct partial_symtab
*,
1571 CORE_ADDR
, int decode_mapping
);
1573 static void dwarf2_start_subfile (const char *, const char *);
1575 static struct compunit_symtab
*dwarf2_start_symtab (struct dwarf2_cu
*,
1576 const char *, const char *,
1579 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1580 struct dwarf2_cu
*, struct symbol
* = NULL
);
1582 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1583 struct dwarf2_cu
*);
1585 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1588 struct obstack
*obstack
,
1589 struct dwarf2_cu
*cu
, LONGEST
*value
,
1590 const gdb_byte
**bytes
,
1591 struct dwarf2_locexpr_baton
**baton
);
1593 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1595 static int need_gnat_info (struct dwarf2_cu
*);
1597 static struct type
*die_descriptive_type (struct die_info
*,
1598 struct dwarf2_cu
*);
1600 static void set_descriptive_type (struct type
*, struct die_info
*,
1601 struct dwarf2_cu
*);
1603 static struct type
*die_containing_type (struct die_info
*,
1604 struct dwarf2_cu
*);
1606 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1607 struct dwarf2_cu
*);
1609 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1611 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1613 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1615 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1616 const char *suffix
, int physname
,
1617 struct dwarf2_cu
*cu
);
1619 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1621 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1623 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1625 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1627 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1629 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1631 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1632 struct dwarf2_cu
*, struct partial_symtab
*);
1634 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1635 values. Keep the items ordered with increasing constraints compliance. */
1638 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1639 PC_BOUNDS_NOT_PRESENT
,
1641 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1642 were present but they do not form a valid range of PC addresses. */
1645 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1648 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1652 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1653 CORE_ADDR
*, CORE_ADDR
*,
1655 struct partial_symtab
*);
1657 static void get_scope_pc_bounds (struct die_info
*,
1658 CORE_ADDR
*, CORE_ADDR
*,
1659 struct dwarf2_cu
*);
1661 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1662 CORE_ADDR
, struct dwarf2_cu
*);
1664 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1665 struct dwarf2_cu
*);
1667 static void dwarf2_attach_fields_to_type (struct field_info
*,
1668 struct type
*, struct dwarf2_cu
*);
1670 static void dwarf2_add_member_fn (struct field_info
*,
1671 struct die_info
*, struct type
*,
1672 struct dwarf2_cu
*);
1674 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1676 struct dwarf2_cu
*);
1678 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1680 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1682 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1684 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1686 static struct using_direct
**using_directives (enum language
);
1688 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1690 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1692 static struct type
*read_module_type (struct die_info
*die
,
1693 struct dwarf2_cu
*cu
);
1695 static const char *namespace_name (struct die_info
*die
,
1696 int *is_anonymous
, struct dwarf2_cu
*);
1698 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1700 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1702 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1703 struct dwarf2_cu
*);
1705 static struct die_info
*read_die_and_siblings_1
1706 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1709 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1710 const gdb_byte
*info_ptr
,
1711 const gdb_byte
**new_info_ptr
,
1712 struct die_info
*parent
);
1714 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1715 struct die_info
**, const gdb_byte
*,
1718 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1719 struct die_info
**, const gdb_byte
*,
1722 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1724 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1727 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1729 static const char *dwarf2_full_name (const char *name
,
1730 struct die_info
*die
,
1731 struct dwarf2_cu
*cu
);
1733 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1734 struct dwarf2_cu
*cu
);
1736 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1737 struct dwarf2_cu
**);
1739 static const char *dwarf_tag_name (unsigned int);
1741 static const char *dwarf_attr_name (unsigned int);
1743 static const char *dwarf_form_name (unsigned int);
1745 static const char *dwarf_bool_name (unsigned int);
1747 static const char *dwarf_type_encoding_name (unsigned int);
1749 static struct die_info
*sibling_die (struct die_info
*);
1751 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1753 static void dump_die_for_error (struct die_info
*);
1755 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1758 /*static*/ void dump_die (struct die_info
*, int max_level
);
1760 static void store_in_ref_table (struct die_info
*,
1761 struct dwarf2_cu
*);
1763 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1765 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1767 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1768 const struct attribute
*,
1769 struct dwarf2_cu
**);
1771 static struct die_info
*follow_die_ref (struct die_info
*,
1772 const struct attribute
*,
1773 struct dwarf2_cu
**);
1775 static struct die_info
*follow_die_sig (struct die_info
*,
1776 const struct attribute
*,
1777 struct dwarf2_cu
**);
1779 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1780 struct dwarf2_cu
*);
1782 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1783 const struct attribute
*,
1784 struct dwarf2_cu
*);
1786 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1788 static void read_signatured_type (struct signatured_type
*);
1790 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1791 struct die_info
*die
, struct dwarf2_cu
*cu
,
1792 struct dynamic_prop
*prop
);
1794 /* memory allocation interface */
1796 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1798 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1800 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1802 static int attr_form_is_block (const struct attribute
*);
1804 static int attr_form_is_section_offset (const struct attribute
*);
1806 static int attr_form_is_constant (const struct attribute
*);
1808 static int attr_form_is_ref (const struct attribute
*);
1810 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1811 struct dwarf2_loclist_baton
*baton
,
1812 const struct attribute
*attr
);
1814 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1816 struct dwarf2_cu
*cu
,
1819 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1820 const gdb_byte
*info_ptr
,
1821 struct abbrev_info
*abbrev
);
1823 static hashval_t
partial_die_hash (const void *item
);
1825 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1827 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1828 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1829 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1831 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1832 struct die_info
*comp_unit_die
,
1833 enum language pretend_language
);
1835 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1837 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1839 static struct type
*set_die_type (struct die_info
*, struct type
*,
1840 struct dwarf2_cu
*);
1842 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1844 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1846 static void load_full_comp_unit (struct dwarf2_per_cu_data
*, bool,
1849 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1852 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1855 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1856 struct dwarf2_per_cu_data
*);
1858 static void dwarf2_mark (struct dwarf2_cu
*);
1860 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1862 static struct type
*get_die_type_at_offset (sect_offset
,
1863 struct dwarf2_per_cu_data
*);
1865 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1867 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1868 enum language pretend_language
);
1870 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1872 /* Class, the destructor of which frees all allocated queue entries. This
1873 will only have work to do if an error was thrown while processing the
1874 dwarf. If no error was thrown then the queue entries should have all
1875 been processed, and freed, as we went along. */
1877 class dwarf2_queue_guard
1880 dwarf2_queue_guard () = default;
1882 /* Free any entries remaining on the queue. There should only be
1883 entries left if we hit an error while processing the dwarf. */
1884 ~dwarf2_queue_guard ()
1886 struct dwarf2_queue_item
*item
, *last
;
1888 item
= dwarf2_queue
;
1891 /* Anything still marked queued is likely to be in an
1892 inconsistent state, so discard it. */
1893 if (item
->per_cu
->queued
)
1895 if (item
->per_cu
->cu
!= NULL
)
1896 free_one_cached_comp_unit (item
->per_cu
);
1897 item
->per_cu
->queued
= 0;
1905 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
1909 /* The return type of find_file_and_directory. Note, the enclosed
1910 string pointers are only valid while this object is valid. */
1912 struct file_and_directory
1914 /* The filename. This is never NULL. */
1917 /* The compilation directory. NULL if not known. If we needed to
1918 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1919 points directly to the DW_AT_comp_dir string attribute owned by
1920 the obstack that owns the DIE. */
1921 const char *comp_dir
;
1923 /* If we needed to build a new string for comp_dir, this is what
1924 owns the storage. */
1925 std::string comp_dir_storage
;
1928 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1929 struct dwarf2_cu
*cu
);
1931 static char *file_full_name (int file
, struct line_header
*lh
,
1932 const char *comp_dir
);
1934 /* Expected enum dwarf_unit_type for read_comp_unit_head. */
1935 enum class rcuh_kind
{ COMPILE
, TYPE
};
1937 static const gdb_byte
*read_and_check_comp_unit_head
1938 (struct dwarf2_per_objfile
* dwarf2_per_objfile
,
1939 struct comp_unit_head
*header
,
1940 struct dwarf2_section_info
*section
,
1941 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1942 rcuh_kind section_kind
);
1944 static void init_cutu_and_read_dies
1945 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1946 int use_existing_cu
, int keep
, bool skip_partial
,
1947 die_reader_func_ftype
*die_reader_func
, void *data
);
1949 static void init_cutu_and_read_dies_simple
1950 (struct dwarf2_per_cu_data
*this_cu
,
1951 die_reader_func_ftype
*die_reader_func
, void *data
);
1953 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1955 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1957 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1958 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1959 struct dwp_file
*dwp_file
, const char *comp_dir
,
1960 ULONGEST signature
, int is_debug_types
);
1962 static struct dwp_file
*get_dwp_file
1963 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1965 static struct dwo_unit
*lookup_dwo_comp_unit
1966 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1968 static struct dwo_unit
*lookup_dwo_type_unit
1969 (struct signatured_type
*, const char *, const char *);
1971 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1973 static void free_dwo_file (struct dwo_file
*);
1975 /* A unique_ptr helper to free a dwo_file. */
1977 struct dwo_file_deleter
1979 void operator() (struct dwo_file
*df
) const
1985 /* A unique pointer to a dwo_file. */
1987 typedef std::unique_ptr
<struct dwo_file
, dwo_file_deleter
> dwo_file_up
;
1989 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1991 static void check_producer (struct dwarf2_cu
*cu
);
1993 static void free_line_header_voidp (void *arg
);
1995 /* Various complaints about symbol reading that don't abort the process. */
1998 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
2000 complaint (_("statement list doesn't fit in .debug_line section"));
2004 dwarf2_debug_line_missing_file_complaint (void)
2006 complaint (_(".debug_line section has line data without a file"));
2010 dwarf2_debug_line_missing_end_sequence_complaint (void)
2012 complaint (_(".debug_line section has line "
2013 "program sequence without an end"));
2017 dwarf2_complex_location_expr_complaint (void)
2019 complaint (_("location expression too complex"));
2023 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
2026 complaint (_("const value length mismatch for '%s', got %d, expected %d"),
2031 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
2033 complaint (_("debug info runs off end of %s section"
2035 get_section_name (section
),
2036 get_section_file_name (section
));
2040 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
2042 complaint (_("macro debug info contains a "
2043 "malformed macro definition:\n`%s'"),
2048 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
2050 complaint (_("invalid attribute class or form for '%s' in '%s'"),
2054 /* Hash function for line_header_hash. */
2057 line_header_hash (const struct line_header
*ofs
)
2059 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
2062 /* Hash function for htab_create_alloc_ex for line_header_hash. */
2065 line_header_hash_voidp (const void *item
)
2067 const struct line_header
*ofs
= (const struct line_header
*) item
;
2069 return line_header_hash (ofs
);
2072 /* Equality function for line_header_hash. */
2075 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
2077 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
2078 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
2080 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
2081 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
2086 /* Read the given attribute value as an address, taking the attribute's
2087 form into account. */
2090 attr_value_as_address (struct attribute
*attr
)
2094 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
2096 /* Aside from a few clearly defined exceptions, attributes that
2097 contain an address must always be in DW_FORM_addr form.
2098 Unfortunately, some compilers happen to be violating this
2099 requirement by encoding addresses using other forms, such
2100 as DW_FORM_data4 for example. For those broken compilers,
2101 we try to do our best, without any guarantee of success,
2102 to interpret the address correctly. It would also be nice
2103 to generate a complaint, but that would require us to maintain
2104 a list of legitimate cases where a non-address form is allowed,
2105 as well as update callers to pass in at least the CU's DWARF
2106 version. This is more overhead than what we're willing to
2107 expand for a pretty rare case. */
2108 addr
= DW_UNSND (attr
);
2111 addr
= DW_ADDR (attr
);
2116 /* See declaration. */
2118 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
2119 const dwarf2_debug_sections
*names
)
2120 : objfile (objfile_
)
2123 names
= &dwarf2_elf_names
;
2125 bfd
*obfd
= objfile
->obfd
;
2127 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2128 locate_sections (obfd
, sec
, *names
);
2131 static void free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
);
2133 dwarf2_per_objfile::~dwarf2_per_objfile ()
2135 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
2136 free_cached_comp_units ();
2138 if (quick_file_names_table
)
2139 htab_delete (quick_file_names_table
);
2141 if (line_header_hash
)
2142 htab_delete (line_header_hash
);
2144 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
2145 VEC_free (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
);
2147 for (signatured_type
*sig_type
: all_type_units
)
2148 VEC_free (dwarf2_per_cu_ptr
, sig_type
->per_cu
.imported_symtabs
);
2150 VEC_free (dwarf2_section_info_def
, types
);
2152 if (dwo_files
!= NULL
)
2153 free_dwo_files (dwo_files
, objfile
);
2155 /* Everything else should be on the objfile obstack. */
2158 /* See declaration. */
2161 dwarf2_per_objfile::free_cached_comp_units ()
2163 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
2164 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
2165 while (per_cu
!= NULL
)
2167 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
2170 *last_chain
= next_cu
;
2175 /* A helper class that calls free_cached_comp_units on
2178 class free_cached_comp_units
2182 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
2183 : m_per_objfile (per_objfile
)
2187 ~free_cached_comp_units ()
2189 m_per_objfile
->free_cached_comp_units ();
2192 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
2196 dwarf2_per_objfile
*m_per_objfile
;
2199 /* Try to locate the sections we need for DWARF 2 debugging
2200 information and return true if we have enough to do something.
2201 NAMES points to the dwarf2 section names, or is NULL if the standard
2202 ELF names are used. */
2205 dwarf2_has_info (struct objfile
*objfile
,
2206 const struct dwarf2_debug_sections
*names
)
2208 if (objfile
->flags
& OBJF_READNEVER
)
2211 struct dwarf2_per_objfile
*dwarf2_per_objfile
2212 = get_dwarf2_per_objfile (objfile
);
2214 if (dwarf2_per_objfile
== NULL
)
2216 /* Initialize per-objfile state. */
2218 = new (&objfile
->objfile_obstack
) struct dwarf2_per_objfile (objfile
,
2220 set_dwarf2_per_objfile (objfile
, dwarf2_per_objfile
);
2222 return (!dwarf2_per_objfile
->info
.is_virtual
2223 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2224 && !dwarf2_per_objfile
->abbrev
.is_virtual
2225 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2228 /* Return the containing section of virtual section SECTION. */
2230 static struct dwarf2_section_info
*
2231 get_containing_section (const struct dwarf2_section_info
*section
)
2233 gdb_assert (section
->is_virtual
);
2234 return section
->s
.containing_section
;
2237 /* Return the bfd owner of SECTION. */
2240 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2242 if (section
->is_virtual
)
2244 section
= get_containing_section (section
);
2245 gdb_assert (!section
->is_virtual
);
2247 return section
->s
.section
->owner
;
2250 /* Return the bfd section of SECTION.
2251 Returns NULL if the section is not present. */
2254 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2256 if (section
->is_virtual
)
2258 section
= get_containing_section (section
);
2259 gdb_assert (!section
->is_virtual
);
2261 return section
->s
.section
;
2264 /* Return the name of SECTION. */
2267 get_section_name (const struct dwarf2_section_info
*section
)
2269 asection
*sectp
= get_section_bfd_section (section
);
2271 gdb_assert (sectp
!= NULL
);
2272 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2275 /* Return the name of the file SECTION is in. */
2278 get_section_file_name (const struct dwarf2_section_info
*section
)
2280 bfd
*abfd
= get_section_bfd_owner (section
);
2282 return bfd_get_filename (abfd
);
2285 /* Return the id of SECTION.
2286 Returns 0 if SECTION doesn't exist. */
2289 get_section_id (const struct dwarf2_section_info
*section
)
2291 asection
*sectp
= get_section_bfd_section (section
);
2298 /* Return the flags of SECTION.
2299 SECTION (or containing section if this is a virtual section) must exist. */
2302 get_section_flags (const struct dwarf2_section_info
*section
)
2304 asection
*sectp
= get_section_bfd_section (section
);
2306 gdb_assert (sectp
!= NULL
);
2307 return bfd_get_section_flags (sectp
->owner
, sectp
);
2310 /* When loading sections, we look either for uncompressed section or for
2311 compressed section names. */
2314 section_is_p (const char *section_name
,
2315 const struct dwarf2_section_names
*names
)
2317 if (names
->normal
!= NULL
2318 && strcmp (section_name
, names
->normal
) == 0)
2320 if (names
->compressed
!= NULL
2321 && strcmp (section_name
, names
->compressed
) == 0)
2326 /* See declaration. */
2329 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
2330 const dwarf2_debug_sections
&names
)
2332 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2334 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2337 else if (section_is_p (sectp
->name
, &names
.info
))
2339 this->info
.s
.section
= sectp
;
2340 this->info
.size
= bfd_get_section_size (sectp
);
2342 else if (section_is_p (sectp
->name
, &names
.abbrev
))
2344 this->abbrev
.s
.section
= sectp
;
2345 this->abbrev
.size
= bfd_get_section_size (sectp
);
2347 else if (section_is_p (sectp
->name
, &names
.line
))
2349 this->line
.s
.section
= sectp
;
2350 this->line
.size
= bfd_get_section_size (sectp
);
2352 else if (section_is_p (sectp
->name
, &names
.loc
))
2354 this->loc
.s
.section
= sectp
;
2355 this->loc
.size
= bfd_get_section_size (sectp
);
2357 else if (section_is_p (sectp
->name
, &names
.loclists
))
2359 this->loclists
.s
.section
= sectp
;
2360 this->loclists
.size
= bfd_get_section_size (sectp
);
2362 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2364 this->macinfo
.s
.section
= sectp
;
2365 this->macinfo
.size
= bfd_get_section_size (sectp
);
2367 else if (section_is_p (sectp
->name
, &names
.macro
))
2369 this->macro
.s
.section
= sectp
;
2370 this->macro
.size
= bfd_get_section_size (sectp
);
2372 else if (section_is_p (sectp
->name
, &names
.str
))
2374 this->str
.s
.section
= sectp
;
2375 this->str
.size
= bfd_get_section_size (sectp
);
2377 else if (section_is_p (sectp
->name
, &names
.line_str
))
2379 this->line_str
.s
.section
= sectp
;
2380 this->line_str
.size
= bfd_get_section_size (sectp
);
2382 else if (section_is_p (sectp
->name
, &names
.addr
))
2384 this->addr
.s
.section
= sectp
;
2385 this->addr
.size
= bfd_get_section_size (sectp
);
2387 else if (section_is_p (sectp
->name
, &names
.frame
))
2389 this->frame
.s
.section
= sectp
;
2390 this->frame
.size
= bfd_get_section_size (sectp
);
2392 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2394 this->eh_frame
.s
.section
= sectp
;
2395 this->eh_frame
.size
= bfd_get_section_size (sectp
);
2397 else if (section_is_p (sectp
->name
, &names
.ranges
))
2399 this->ranges
.s
.section
= sectp
;
2400 this->ranges
.size
= bfd_get_section_size (sectp
);
2402 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2404 this->rnglists
.s
.section
= sectp
;
2405 this->rnglists
.size
= bfd_get_section_size (sectp
);
2407 else if (section_is_p (sectp
->name
, &names
.types
))
2409 struct dwarf2_section_info type_section
;
2411 memset (&type_section
, 0, sizeof (type_section
));
2412 type_section
.s
.section
= sectp
;
2413 type_section
.size
= bfd_get_section_size (sectp
);
2415 VEC_safe_push (dwarf2_section_info_def
, this->types
,
2418 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2420 this->gdb_index
.s
.section
= sectp
;
2421 this->gdb_index
.size
= bfd_get_section_size (sectp
);
2423 else if (section_is_p (sectp
->name
, &names
.debug_names
))
2425 this->debug_names
.s
.section
= sectp
;
2426 this->debug_names
.size
= bfd_get_section_size (sectp
);
2428 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
2430 this->debug_aranges
.s
.section
= sectp
;
2431 this->debug_aranges
.size
= bfd_get_section_size (sectp
);
2434 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2435 && bfd_section_vma (abfd
, sectp
) == 0)
2436 this->has_section_at_zero
= true;
2439 /* A helper function that decides whether a section is empty,
2443 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2445 if (section
->is_virtual
)
2446 return section
->size
== 0;
2447 return section
->s
.section
== NULL
|| section
->size
== 0;
2450 /* See dwarf2read.h. */
2453 dwarf2_read_section (struct objfile
*objfile
, dwarf2_section_info
*info
)
2457 gdb_byte
*buf
, *retbuf
;
2461 info
->buffer
= NULL
;
2464 if (dwarf2_section_empty_p (info
))
2467 sectp
= get_section_bfd_section (info
);
2469 /* If this is a virtual section we need to read in the real one first. */
2470 if (info
->is_virtual
)
2472 struct dwarf2_section_info
*containing_section
=
2473 get_containing_section (info
);
2475 gdb_assert (sectp
!= NULL
);
2476 if ((sectp
->flags
& SEC_RELOC
) != 0)
2478 error (_("Dwarf Error: DWP format V2 with relocations is not"
2479 " supported in section %s [in module %s]"),
2480 get_section_name (info
), get_section_file_name (info
));
2482 dwarf2_read_section (objfile
, containing_section
);
2483 /* Other code should have already caught virtual sections that don't
2485 gdb_assert (info
->virtual_offset
+ info
->size
2486 <= containing_section
->size
);
2487 /* If the real section is empty or there was a problem reading the
2488 section we shouldn't get here. */
2489 gdb_assert (containing_section
->buffer
!= NULL
);
2490 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2494 /* If the section has relocations, we must read it ourselves.
2495 Otherwise we attach it to the BFD. */
2496 if ((sectp
->flags
& SEC_RELOC
) == 0)
2498 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2502 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2505 /* When debugging .o files, we may need to apply relocations; see
2506 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2507 We never compress sections in .o files, so we only need to
2508 try this when the section is not compressed. */
2509 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2512 info
->buffer
= retbuf
;
2516 abfd
= get_section_bfd_owner (info
);
2517 gdb_assert (abfd
!= NULL
);
2519 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2520 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2522 error (_("Dwarf Error: Can't read DWARF data"
2523 " in section %s [in module %s]"),
2524 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2528 /* A helper function that returns the size of a section in a safe way.
2529 If you are positive that the section has been read before using the
2530 size, then it is safe to refer to the dwarf2_section_info object's
2531 "size" field directly. In other cases, you must call this
2532 function, because for compressed sections the size field is not set
2533 correctly until the section has been read. */
2535 static bfd_size_type
2536 dwarf2_section_size (struct objfile
*objfile
,
2537 struct dwarf2_section_info
*info
)
2540 dwarf2_read_section (objfile
, info
);
2544 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2548 dwarf2_get_section_info (struct objfile
*objfile
,
2549 enum dwarf2_section_enum sect
,
2550 asection
**sectp
, const gdb_byte
**bufp
,
2551 bfd_size_type
*sizep
)
2553 struct dwarf2_per_objfile
*data
2554 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
2555 dwarf2_objfile_data_key
);
2556 struct dwarf2_section_info
*info
;
2558 /* We may see an objfile without any DWARF, in which case we just
2569 case DWARF2_DEBUG_FRAME
:
2570 info
= &data
->frame
;
2572 case DWARF2_EH_FRAME
:
2573 info
= &data
->eh_frame
;
2576 gdb_assert_not_reached ("unexpected section");
2579 dwarf2_read_section (objfile
, info
);
2581 *sectp
= get_section_bfd_section (info
);
2582 *bufp
= info
->buffer
;
2583 *sizep
= info
->size
;
2586 /* A helper function to find the sections for a .dwz file. */
2589 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2591 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2593 /* Note that we only support the standard ELF names, because .dwz
2594 is ELF-only (at the time of writing). */
2595 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2597 dwz_file
->abbrev
.s
.section
= sectp
;
2598 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2600 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2602 dwz_file
->info
.s
.section
= sectp
;
2603 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2605 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2607 dwz_file
->str
.s
.section
= sectp
;
2608 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2610 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2612 dwz_file
->line
.s
.section
= sectp
;
2613 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2615 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2617 dwz_file
->macro
.s
.section
= sectp
;
2618 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2620 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2622 dwz_file
->gdb_index
.s
.section
= sectp
;
2623 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2625 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2627 dwz_file
->debug_names
.s
.section
= sectp
;
2628 dwz_file
->debug_names
.size
= bfd_get_section_size (sectp
);
2632 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2633 there is no .gnu_debugaltlink section in the file. Error if there
2634 is such a section but the file cannot be found. */
2636 static struct dwz_file
*
2637 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2639 const char *filename
;
2640 bfd_size_type buildid_len_arg
;
2644 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2645 return dwarf2_per_objfile
->dwz_file
.get ();
2647 bfd_set_error (bfd_error_no_error
);
2648 gdb::unique_xmalloc_ptr
<char> data
2649 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2650 &buildid_len_arg
, &buildid
));
2653 if (bfd_get_error () == bfd_error_no_error
)
2655 error (_("could not read '.gnu_debugaltlink' section: %s"),
2656 bfd_errmsg (bfd_get_error ()));
2659 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2661 buildid_len
= (size_t) buildid_len_arg
;
2663 filename
= data
.get ();
2665 std::string abs_storage
;
2666 if (!IS_ABSOLUTE_PATH (filename
))
2668 gdb::unique_xmalloc_ptr
<char> abs
2669 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2671 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2672 filename
= abs_storage
.c_str ();
2675 /* First try the file name given in the section. If that doesn't
2676 work, try to use the build-id instead. */
2677 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2678 if (dwz_bfd
!= NULL
)
2680 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2684 if (dwz_bfd
== NULL
)
2685 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2687 if (dwz_bfd
== NULL
)
2688 error (_("could not find '.gnu_debugaltlink' file for %s"),
2689 objfile_name (dwarf2_per_objfile
->objfile
));
2691 std::unique_ptr
<struct dwz_file
> result
2692 (new struct dwz_file (std::move (dwz_bfd
)));
2694 bfd_map_over_sections (result
->dwz_bfd
.get (), locate_dwz_sections
,
2697 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
,
2698 result
->dwz_bfd
.get ());
2699 dwarf2_per_objfile
->dwz_file
= std::move (result
);
2700 return dwarf2_per_objfile
->dwz_file
.get ();
2703 /* DWARF quick_symbols_functions support. */
2705 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2706 unique line tables, so we maintain a separate table of all .debug_line
2707 derived entries to support the sharing.
2708 All the quick functions need is the list of file names. We discard the
2709 line_header when we're done and don't need to record it here. */
2710 struct quick_file_names
2712 /* The data used to construct the hash key. */
2713 struct stmt_list_hash hash
;
2715 /* The number of entries in file_names, real_names. */
2716 unsigned int num_file_names
;
2718 /* The file names from the line table, after being run through
2720 const char **file_names
;
2722 /* The file names from the line table after being run through
2723 gdb_realpath. These are computed lazily. */
2724 const char **real_names
;
2727 /* When using the index (and thus not using psymtabs), each CU has an
2728 object of this type. This is used to hold information needed by
2729 the various "quick" methods. */
2730 struct dwarf2_per_cu_quick_data
2732 /* The file table. This can be NULL if there was no file table
2733 or it's currently not read in.
2734 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2735 struct quick_file_names
*file_names
;
2737 /* The corresponding symbol table. This is NULL if symbols for this
2738 CU have not yet been read. */
2739 struct compunit_symtab
*compunit_symtab
;
2741 /* A temporary mark bit used when iterating over all CUs in
2742 expand_symtabs_matching. */
2743 unsigned int mark
: 1;
2745 /* True if we've tried to read the file table and found there isn't one.
2746 There will be no point in trying to read it again next time. */
2747 unsigned int no_file_data
: 1;
2750 /* Utility hash function for a stmt_list_hash. */
2753 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2757 if (stmt_list_hash
->dwo_unit
!= NULL
)
2758 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2759 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2763 /* Utility equality function for a stmt_list_hash. */
2766 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2767 const struct stmt_list_hash
*rhs
)
2769 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2771 if (lhs
->dwo_unit
!= NULL
2772 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2775 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2778 /* Hash function for a quick_file_names. */
2781 hash_file_name_entry (const void *e
)
2783 const struct quick_file_names
*file_data
2784 = (const struct quick_file_names
*) e
;
2786 return hash_stmt_list_entry (&file_data
->hash
);
2789 /* Equality function for a quick_file_names. */
2792 eq_file_name_entry (const void *a
, const void *b
)
2794 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2795 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2797 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2800 /* Delete function for a quick_file_names. */
2803 delete_file_name_entry (void *e
)
2805 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2808 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2810 xfree ((void*) file_data
->file_names
[i
]);
2811 if (file_data
->real_names
)
2812 xfree ((void*) file_data
->real_names
[i
]);
2815 /* The space for the struct itself lives on objfile_obstack,
2816 so we don't free it here. */
2819 /* Create a quick_file_names hash table. */
2822 create_quick_file_names_table (unsigned int nr_initial_entries
)
2824 return htab_create_alloc (nr_initial_entries
,
2825 hash_file_name_entry
, eq_file_name_entry
,
2826 delete_file_name_entry
, xcalloc
, xfree
);
2829 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2830 have to be created afterwards. You should call age_cached_comp_units after
2831 processing PER_CU->CU. dw2_setup must have been already called. */
2834 load_cu (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2836 if (per_cu
->is_debug_types
)
2837 load_full_type_unit (per_cu
);
2839 load_full_comp_unit (per_cu
, skip_partial
, language_minimal
);
2841 if (per_cu
->cu
== NULL
)
2842 return; /* Dummy CU. */
2844 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2847 /* Read in the symbols for PER_CU. */
2850 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2852 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2854 /* Skip type_unit_groups, reading the type units they contain
2855 is handled elsewhere. */
2856 if (IS_TYPE_UNIT_GROUP (per_cu
))
2859 /* The destructor of dwarf2_queue_guard frees any entries left on
2860 the queue. After this point we're guaranteed to leave this function
2861 with the dwarf queue empty. */
2862 dwarf2_queue_guard q_guard
;
2864 if (dwarf2_per_objfile
->using_index
2865 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2866 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2868 queue_comp_unit (per_cu
, language_minimal
);
2869 load_cu (per_cu
, skip_partial
);
2871 /* If we just loaded a CU from a DWO, and we're working with an index
2872 that may badly handle TUs, load all the TUs in that DWO as well.
2873 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2874 if (!per_cu
->is_debug_types
2875 && per_cu
->cu
!= NULL
2876 && per_cu
->cu
->dwo_unit
!= NULL
2877 && dwarf2_per_objfile
->index_table
!= NULL
2878 && dwarf2_per_objfile
->index_table
->version
<= 7
2879 /* DWP files aren't supported yet. */
2880 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2881 queue_and_load_all_dwo_tus (per_cu
);
2884 process_queue (dwarf2_per_objfile
);
2886 /* Age the cache, releasing compilation units that have not
2887 been used recently. */
2888 age_cached_comp_units (dwarf2_per_objfile
);
2891 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2892 the objfile from which this CU came. Returns the resulting symbol
2895 static struct compunit_symtab
*
2896 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2898 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2900 gdb_assert (dwarf2_per_objfile
->using_index
);
2901 if (!per_cu
->v
.quick
->compunit_symtab
)
2903 free_cached_comp_units
freer (dwarf2_per_objfile
);
2904 scoped_restore decrementer
= increment_reading_symtab ();
2905 dw2_do_instantiate_symtab (per_cu
, skip_partial
);
2906 process_cu_includes (dwarf2_per_objfile
);
2909 return per_cu
->v
.quick
->compunit_symtab
;
2912 /* See declaration. */
2914 dwarf2_per_cu_data
*
2915 dwarf2_per_objfile::get_cutu (int index
)
2917 if (index
>= this->all_comp_units
.size ())
2919 index
-= this->all_comp_units
.size ();
2920 gdb_assert (index
< this->all_type_units
.size ());
2921 return &this->all_type_units
[index
]->per_cu
;
2924 return this->all_comp_units
[index
];
2927 /* See declaration. */
2929 dwarf2_per_cu_data
*
2930 dwarf2_per_objfile::get_cu (int index
)
2932 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2934 return this->all_comp_units
[index
];
2937 /* See declaration. */
2940 dwarf2_per_objfile::get_tu (int index
)
2942 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2944 return this->all_type_units
[index
];
2947 /* Return a new dwarf2_per_cu_data allocated on OBJFILE's
2948 objfile_obstack, and constructed with the specified field
2951 static dwarf2_per_cu_data
*
2952 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2953 struct dwarf2_section_info
*section
,
2955 sect_offset sect_off
, ULONGEST length
)
2957 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2958 dwarf2_per_cu_data
*the_cu
2959 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2960 struct dwarf2_per_cu_data
);
2961 the_cu
->sect_off
= sect_off
;
2962 the_cu
->length
= length
;
2963 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2964 the_cu
->section
= section
;
2965 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2966 struct dwarf2_per_cu_quick_data
);
2967 the_cu
->is_dwz
= is_dwz
;
2971 /* A helper for create_cus_from_index that handles a given list of
2975 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2976 const gdb_byte
*cu_list
, offset_type n_elements
,
2977 struct dwarf2_section_info
*section
,
2980 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2982 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2984 sect_offset sect_off
2985 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2986 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2989 dwarf2_per_cu_data
*per_cu
2990 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
2992 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
2996 /* Read the CU list from the mapped index, and use it to create all
2997 the CU objects for this objfile. */
3000 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3001 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
3002 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
3004 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
3005 dwarf2_per_objfile
->all_comp_units
.reserve
3006 ((cu_list_elements
+ dwz_elements
) / 2);
3008 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3009 &dwarf2_per_objfile
->info
, 0);
3011 if (dwz_elements
== 0)
3014 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3015 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
3019 /* Create the signatured type hash table from the index. */
3022 create_signatured_type_table_from_index
3023 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3024 struct dwarf2_section_info
*section
,
3025 const gdb_byte
*bytes
,
3026 offset_type elements
)
3028 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3030 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3031 dwarf2_per_objfile
->all_type_units
.reserve (elements
/ 3);
3033 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3035 for (offset_type i
= 0; i
< elements
; i
+= 3)
3037 struct signatured_type
*sig_type
;
3040 cu_offset type_offset_in_tu
;
3042 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3043 sect_offset sect_off
3044 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
3046 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
3048 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
3051 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3052 struct signatured_type
);
3053 sig_type
->signature
= signature
;
3054 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3055 sig_type
->per_cu
.is_debug_types
= 1;
3056 sig_type
->per_cu
.section
= section
;
3057 sig_type
->per_cu
.sect_off
= sect_off
;
3058 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3059 sig_type
->per_cu
.v
.quick
3060 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3061 struct dwarf2_per_cu_quick_data
);
3063 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3066 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3069 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3072 /* Create the signatured type hash table from .debug_names. */
3075 create_signatured_type_table_from_debug_names
3076 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3077 const mapped_debug_names
&map
,
3078 struct dwarf2_section_info
*section
,
3079 struct dwarf2_section_info
*abbrev_section
)
3081 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3083 dwarf2_read_section (objfile
, section
);
3084 dwarf2_read_section (objfile
, abbrev_section
);
3086 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3087 dwarf2_per_objfile
->all_type_units
.reserve (map
.tu_count
);
3089 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3091 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
3093 struct signatured_type
*sig_type
;
3096 sect_offset sect_off
3097 = (sect_offset
) (extract_unsigned_integer
3098 (map
.tu_table_reordered
+ i
* map
.offset_size
,
3100 map
.dwarf5_byte_order
));
3102 comp_unit_head cu_header
;
3103 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
3105 section
->buffer
+ to_underlying (sect_off
),
3108 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3109 struct signatured_type
);
3110 sig_type
->signature
= cu_header
.signature
;
3111 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
3112 sig_type
->per_cu
.is_debug_types
= 1;
3113 sig_type
->per_cu
.section
= section
;
3114 sig_type
->per_cu
.sect_off
= sect_off
;
3115 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3116 sig_type
->per_cu
.v
.quick
3117 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3118 struct dwarf2_per_cu_quick_data
);
3120 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3123 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3126 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3129 /* Read the address map data from the mapped index, and use it to
3130 populate the objfile's psymtabs_addrmap. */
3133 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3134 struct mapped_index
*index
)
3136 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3137 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3138 const gdb_byte
*iter
, *end
;
3139 struct addrmap
*mutable_map
;
3142 auto_obstack temp_obstack
;
3144 mutable_map
= addrmap_create_mutable (&temp_obstack
);
3146 iter
= index
->address_table
.data ();
3147 end
= iter
+ index
->address_table
.size ();
3149 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3153 ULONGEST hi
, lo
, cu_index
;
3154 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3156 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3158 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
3163 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
3164 hex_string (lo
), hex_string (hi
));
3168 if (cu_index
>= dwarf2_per_objfile
->all_comp_units
.size ())
3170 complaint (_(".gdb_index address table has invalid CU number %u"),
3171 (unsigned) cu_index
);
3175 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
3176 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
3177 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
3178 dwarf2_per_objfile
->get_cu (cu_index
));
3181 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3182 &objfile
->objfile_obstack
);
3185 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
3186 populate the objfile's psymtabs_addrmap. */
3189 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3190 struct dwarf2_section_info
*section
)
3192 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3193 bfd
*abfd
= objfile
->obfd
;
3194 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3195 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
3196 SECT_OFF_TEXT (objfile
));
3198 auto_obstack temp_obstack
;
3199 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
3201 std::unordered_map
<sect_offset
,
3202 dwarf2_per_cu_data
*,
3203 gdb::hash_enum
<sect_offset
>>
3204 debug_info_offset_to_per_cu
;
3205 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3207 const auto insertpair
3208 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
3209 if (!insertpair
.second
)
3211 warning (_("Section .debug_aranges in %s has duplicate "
3212 "debug_info_offset %s, ignoring .debug_aranges."),
3213 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
3218 dwarf2_read_section (objfile
, section
);
3220 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
3222 const gdb_byte
*addr
= section
->buffer
;
3224 while (addr
< section
->buffer
+ section
->size
)
3226 const gdb_byte
*const entry_addr
= addr
;
3227 unsigned int bytes_read
;
3229 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
3233 const gdb_byte
*const entry_end
= addr
+ entry_length
;
3234 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
3235 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
3236 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
3238 warning (_("Section .debug_aranges in %s entry at offset %zu "
3239 "length %s exceeds section length %s, "
3240 "ignoring .debug_aranges."),
3241 objfile_name (objfile
), entry_addr
- section
->buffer
,
3242 plongest (bytes_read
+ entry_length
),
3243 pulongest (section
->size
));
3247 /* The version number. */
3248 const uint16_t version
= read_2_bytes (abfd
, addr
);
3252 warning (_("Section .debug_aranges in %s entry at offset %zu "
3253 "has unsupported version %d, ignoring .debug_aranges."),
3254 objfile_name (objfile
), entry_addr
- section
->buffer
,
3259 const uint64_t debug_info_offset
3260 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
3261 addr
+= offset_size
;
3262 const auto per_cu_it
3263 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
3264 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
3266 warning (_("Section .debug_aranges in %s entry at offset %zu "
3267 "debug_info_offset %s does not exists, "
3268 "ignoring .debug_aranges."),
3269 objfile_name (objfile
), entry_addr
- section
->buffer
,
3270 pulongest (debug_info_offset
));
3273 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
3275 const uint8_t address_size
= *addr
++;
3276 if (address_size
< 1 || address_size
> 8)
3278 warning (_("Section .debug_aranges in %s entry at offset %zu "
3279 "address_size %u is invalid, ignoring .debug_aranges."),
3280 objfile_name (objfile
), entry_addr
- section
->buffer
,
3285 const uint8_t segment_selector_size
= *addr
++;
3286 if (segment_selector_size
!= 0)
3288 warning (_("Section .debug_aranges in %s entry at offset %zu "
3289 "segment_selector_size %u is not supported, "
3290 "ignoring .debug_aranges."),
3291 objfile_name (objfile
), entry_addr
- section
->buffer
,
3292 segment_selector_size
);
3296 /* Must pad to an alignment boundary that is twice the address
3297 size. It is undocumented by the DWARF standard but GCC does
3299 for (size_t padding
= ((-(addr
- section
->buffer
))
3300 & (2 * address_size
- 1));
3301 padding
> 0; padding
--)
3304 warning (_("Section .debug_aranges in %s entry at offset %zu "
3305 "padding is not zero, ignoring .debug_aranges."),
3306 objfile_name (objfile
), entry_addr
- section
->buffer
);
3312 if (addr
+ 2 * address_size
> entry_end
)
3314 warning (_("Section .debug_aranges in %s entry at offset %zu "
3315 "address list is not properly terminated, "
3316 "ignoring .debug_aranges."),
3317 objfile_name (objfile
), entry_addr
- section
->buffer
);
3320 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
3322 addr
+= address_size
;
3323 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
3325 addr
+= address_size
;
3326 if (start
== 0 && length
== 0)
3328 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3330 /* Symbol was eliminated due to a COMDAT group. */
3333 ULONGEST end
= start
+ length
;
3334 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
);
3335 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
);
3336 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
3340 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3341 &objfile
->objfile_obstack
);
3344 /* Find a slot in the mapped index INDEX for the object named NAME.
3345 If NAME is found, set *VEC_OUT to point to the CU vector in the
3346 constant pool and return true. If NAME cannot be found, return
3350 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3351 offset_type
**vec_out
)
3354 offset_type slot
, step
;
3355 int (*cmp
) (const char *, const char *);
3357 gdb::unique_xmalloc_ptr
<char> without_params
;
3358 if (current_language
->la_language
== language_cplus
3359 || current_language
->la_language
== language_fortran
3360 || current_language
->la_language
== language_d
)
3362 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3365 if (strchr (name
, '(') != NULL
)
3367 without_params
= cp_remove_params (name
);
3369 if (without_params
!= NULL
)
3370 name
= without_params
.get ();
3374 /* Index version 4 did not support case insensitive searches. But the
3375 indices for case insensitive languages are built in lowercase, therefore
3376 simulate our NAME being searched is also lowercased. */
3377 hash
= mapped_index_string_hash ((index
->version
== 4
3378 && case_sensitivity
== case_sensitive_off
3379 ? 5 : index
->version
),
3382 slot
= hash
& (index
->symbol_table
.size () - 1);
3383 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
3384 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3390 const auto &bucket
= index
->symbol_table
[slot
];
3391 if (bucket
.name
== 0 && bucket
.vec
== 0)
3394 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
3395 if (!cmp (name
, str
))
3397 *vec_out
= (offset_type
*) (index
->constant_pool
3398 + MAYBE_SWAP (bucket
.vec
));
3402 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
3406 /* A helper function that reads the .gdb_index from SECTION and fills
3407 in MAP. FILENAME is the name of the file containing the section;
3408 it is used for error reporting. DEPRECATED_OK is true if it is
3409 ok to use deprecated sections.
3411 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3412 out parameters that are filled in with information about the CU and
3413 TU lists in the section.
3415 Returns 1 if all went well, 0 otherwise. */
3418 read_index_from_section (struct objfile
*objfile
,
3419 const char *filename
,
3421 struct dwarf2_section_info
*section
,
3422 struct mapped_index
*map
,
3423 const gdb_byte
**cu_list
,
3424 offset_type
*cu_list_elements
,
3425 const gdb_byte
**types_list
,
3426 offset_type
*types_list_elements
)
3428 const gdb_byte
*addr
;
3429 offset_type version
;
3430 offset_type
*metadata
;
3433 if (dwarf2_section_empty_p (section
))
3436 /* Older elfutils strip versions could keep the section in the main
3437 executable while splitting it for the separate debug info file. */
3438 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3441 dwarf2_read_section (objfile
, section
);
3443 addr
= section
->buffer
;
3444 /* Version check. */
3445 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3446 /* Versions earlier than 3 emitted every copy of a psymbol. This
3447 causes the index to behave very poorly for certain requests. Version 3
3448 contained incomplete addrmap. So, it seems better to just ignore such
3452 static int warning_printed
= 0;
3453 if (!warning_printed
)
3455 warning (_("Skipping obsolete .gdb_index section in %s."),
3457 warning_printed
= 1;
3461 /* Index version 4 uses a different hash function than index version
3464 Versions earlier than 6 did not emit psymbols for inlined
3465 functions. Using these files will cause GDB not to be able to
3466 set breakpoints on inlined functions by name, so we ignore these
3467 indices unless the user has done
3468 "set use-deprecated-index-sections on". */
3469 if (version
< 6 && !deprecated_ok
)
3471 static int warning_printed
= 0;
3472 if (!warning_printed
)
3475 Skipping deprecated .gdb_index section in %s.\n\
3476 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3477 to use the section anyway."),
3479 warning_printed
= 1;
3483 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3484 of the TU (for symbols coming from TUs),
3485 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3486 Plus gold-generated indices can have duplicate entries for global symbols,
3487 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3488 These are just performance bugs, and we can't distinguish gdb-generated
3489 indices from gold-generated ones, so issue no warning here. */
3491 /* Indexes with higher version than the one supported by GDB may be no
3492 longer backward compatible. */
3496 map
->version
= version
;
3498 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3501 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3502 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3506 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3507 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3508 - MAYBE_SWAP (metadata
[i
]))
3512 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3513 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3515 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3518 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3519 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3521 = gdb::array_view
<mapped_index::symbol_table_slot
>
3522 ((mapped_index::symbol_table_slot
*) symbol_table
,
3523 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3526 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3531 /* Read .gdb_index. If everything went ok, initialize the "quick"
3532 elements of all the CUs and return 1. Otherwise, return 0. */
3535 dwarf2_read_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
3537 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3538 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3539 struct dwz_file
*dwz
;
3540 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3542 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3543 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3544 use_deprecated_index_sections
,
3545 &dwarf2_per_objfile
->gdb_index
, map
.get (),
3546 &cu_list
, &cu_list_elements
,
3547 &types_list
, &types_list_elements
))
3550 /* Don't use the index if it's empty. */
3551 if (map
->symbol_table
.empty ())
3554 /* If there is a .dwz file, read it so we can get its CU list as
3556 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3559 struct mapped_index dwz_map
;
3560 const gdb_byte
*dwz_types_ignore
;
3561 offset_type dwz_types_elements_ignore
;
3563 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3565 &dwz
->gdb_index
, &dwz_map
,
3566 &dwz_list
, &dwz_list_elements
,
3568 &dwz_types_elements_ignore
))
3570 warning (_("could not read '.gdb_index' section from %s; skipping"),
3571 bfd_get_filename (dwz
->dwz_bfd
));
3576 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3577 dwz_list
, dwz_list_elements
);
3579 if (types_list_elements
)
3581 struct dwarf2_section_info
*section
;
3583 /* We can only handle a single .debug_types when we have an
3585 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3588 section
= VEC_index (dwarf2_section_info_def
,
3589 dwarf2_per_objfile
->types
, 0);
3591 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3592 types_list
, types_list_elements
);
3595 create_addrmap_from_index (dwarf2_per_objfile
, map
.get ());
3597 dwarf2_per_objfile
->index_table
= std::move (map
);
3598 dwarf2_per_objfile
->using_index
= 1;
3599 dwarf2_per_objfile
->quick_file_names_table
=
3600 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
3605 /* die_reader_func for dw2_get_file_names. */
3608 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3609 const gdb_byte
*info_ptr
,
3610 struct die_info
*comp_unit_die
,
3614 struct dwarf2_cu
*cu
= reader
->cu
;
3615 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3616 struct dwarf2_per_objfile
*dwarf2_per_objfile
3617 = cu
->per_cu
->dwarf2_per_objfile
;
3618 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3619 struct dwarf2_per_cu_data
*lh_cu
;
3620 struct attribute
*attr
;
3623 struct quick_file_names
*qfn
;
3625 gdb_assert (! this_cu
->is_debug_types
);
3627 /* Our callers never want to match partial units -- instead they
3628 will match the enclosing full CU. */
3629 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3631 this_cu
->v
.quick
->no_file_data
= 1;
3639 sect_offset line_offset
{};
3641 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3644 struct quick_file_names find_entry
;
3646 line_offset
= (sect_offset
) DW_UNSND (attr
);
3648 /* We may have already read in this line header (TU line header sharing).
3649 If we have we're done. */
3650 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3651 find_entry
.hash
.line_sect_off
= line_offset
;
3652 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3653 &find_entry
, INSERT
);
3656 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3660 lh
= dwarf_decode_line_header (line_offset
, cu
);
3664 lh_cu
->v
.quick
->no_file_data
= 1;
3668 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3669 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3670 qfn
->hash
.line_sect_off
= line_offset
;
3671 gdb_assert (slot
!= NULL
);
3674 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3676 qfn
->num_file_names
= lh
->file_names
.size ();
3678 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->file_names
.size ());
3679 for (i
= 0; i
< lh
->file_names
.size (); ++i
)
3680 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
3681 qfn
->real_names
= NULL
;
3683 lh_cu
->v
.quick
->file_names
= qfn
;
3686 /* A helper for the "quick" functions which attempts to read the line
3687 table for THIS_CU. */
3689 static struct quick_file_names
*
3690 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3692 /* This should never be called for TUs. */
3693 gdb_assert (! this_cu
->is_debug_types
);
3694 /* Nor type unit groups. */
3695 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3697 if (this_cu
->v
.quick
->file_names
!= NULL
)
3698 return this_cu
->v
.quick
->file_names
;
3699 /* If we know there is no line data, no point in looking again. */
3700 if (this_cu
->v
.quick
->no_file_data
)
3703 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3705 if (this_cu
->v
.quick
->no_file_data
)
3707 return this_cu
->v
.quick
->file_names
;
3710 /* A helper for the "quick" functions which computes and caches the
3711 real path for a given file name from the line table. */
3714 dw2_get_real_path (struct objfile
*objfile
,
3715 struct quick_file_names
*qfn
, int index
)
3717 if (qfn
->real_names
== NULL
)
3718 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3719 qfn
->num_file_names
, const char *);
3721 if (qfn
->real_names
[index
] == NULL
)
3722 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3724 return qfn
->real_names
[index
];
3727 static struct symtab
*
3728 dw2_find_last_source_symtab (struct objfile
*objfile
)
3730 struct dwarf2_per_objfile
*dwarf2_per_objfile
3731 = get_dwarf2_per_objfile (objfile
);
3732 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->all_comp_units
.back ();
3733 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
, false);
3738 return compunit_primary_filetab (cust
);
3741 /* Traversal function for dw2_forget_cached_source_info. */
3744 dw2_free_cached_file_names (void **slot
, void *info
)
3746 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3748 if (file_data
->real_names
)
3752 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3754 xfree ((void*) file_data
->real_names
[i
]);
3755 file_data
->real_names
[i
] = NULL
;
3763 dw2_forget_cached_source_info (struct objfile
*objfile
)
3765 struct dwarf2_per_objfile
*dwarf2_per_objfile
3766 = get_dwarf2_per_objfile (objfile
);
3768 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3769 dw2_free_cached_file_names
, NULL
);
3772 /* Helper function for dw2_map_symtabs_matching_filename that expands
3773 the symtabs and calls the iterator. */
3776 dw2_map_expand_apply (struct objfile
*objfile
,
3777 struct dwarf2_per_cu_data
*per_cu
,
3778 const char *name
, const char *real_path
,
3779 gdb::function_view
<bool (symtab
*)> callback
)
3781 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3783 /* Don't visit already-expanded CUs. */
3784 if (per_cu
->v
.quick
->compunit_symtab
)
3787 /* This may expand more than one symtab, and we want to iterate over
3789 dw2_instantiate_symtab (per_cu
, false);
3791 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3792 last_made
, callback
);
3795 /* Implementation of the map_symtabs_matching_filename method. */
3798 dw2_map_symtabs_matching_filename
3799 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3800 gdb::function_view
<bool (symtab
*)> callback
)
3802 const char *name_basename
= lbasename (name
);
3803 struct dwarf2_per_objfile
*dwarf2_per_objfile
3804 = get_dwarf2_per_objfile (objfile
);
3806 /* The rule is CUs specify all the files, including those used by
3807 any TU, so there's no need to scan TUs here. */
3809 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3811 /* We only need to look at symtabs not already expanded. */
3812 if (per_cu
->v
.quick
->compunit_symtab
)
3815 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3816 if (file_data
== NULL
)
3819 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3821 const char *this_name
= file_data
->file_names
[j
];
3822 const char *this_real_name
;
3824 if (compare_filenames_for_search (this_name
, name
))
3826 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3832 /* Before we invoke realpath, which can get expensive when many
3833 files are involved, do a quick comparison of the basenames. */
3834 if (! basenames_may_differ
3835 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3838 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3839 if (compare_filenames_for_search (this_real_name
, name
))
3841 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3847 if (real_path
!= NULL
)
3849 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3850 gdb_assert (IS_ABSOLUTE_PATH (name
));
3851 if (this_real_name
!= NULL
3852 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3854 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3866 /* Struct used to manage iterating over all CUs looking for a symbol. */
3868 struct dw2_symtab_iterator
3870 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3871 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3872 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3873 int want_specific_block
;
3874 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3875 Unused if !WANT_SPECIFIC_BLOCK. */
3877 /* The kind of symbol we're looking for. */
3879 /* The list of CUs from the index entry of the symbol,
3880 or NULL if not found. */
3882 /* The next element in VEC to look at. */
3884 /* The number of elements in VEC, or zero if there is no match. */
3886 /* Have we seen a global version of the symbol?
3887 If so we can ignore all further global instances.
3888 This is to work around gold/15646, inefficient gold-generated
3893 /* Initialize the index symtab iterator ITER.
3894 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3895 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3898 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3899 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3900 int want_specific_block
,
3905 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3906 iter
->want_specific_block
= want_specific_block
;
3907 iter
->block_index
= block_index
;
3908 iter
->domain
= domain
;
3910 iter
->global_seen
= 0;
3912 mapped_index
*index
= dwarf2_per_objfile
->index_table
.get ();
3914 /* index is NULL if OBJF_READNOW. */
3915 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3916 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3924 /* Return the next matching CU or NULL if there are no more. */
3926 static struct dwarf2_per_cu_data
*
3927 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3929 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3931 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3933 offset_type cu_index_and_attrs
=
3934 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3935 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3936 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3937 /* This value is only valid for index versions >= 7. */
3938 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3939 gdb_index_symbol_kind symbol_kind
=
3940 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3941 /* Only check the symbol attributes if they're present.
3942 Indices prior to version 7 don't record them,
3943 and indices >= 7 may elide them for certain symbols
3944 (gold does this). */
3946 (dwarf2_per_objfile
->index_table
->version
>= 7
3947 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3949 /* Don't crash on bad data. */
3950 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
3951 + dwarf2_per_objfile
->all_type_units
.size ()))
3953 complaint (_(".gdb_index entry has bad CU index"
3955 objfile_name (dwarf2_per_objfile
->objfile
));
3959 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
3961 /* Skip if already read in. */
3962 if (per_cu
->v
.quick
->compunit_symtab
)
3965 /* Check static vs global. */
3968 if (iter
->want_specific_block
3969 && want_static
!= is_static
)
3971 /* Work around gold/15646. */
3972 if (!is_static
&& iter
->global_seen
)
3975 iter
->global_seen
= 1;
3978 /* Only check the symbol's kind if it has one. */
3981 switch (iter
->domain
)
3984 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3985 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3986 /* Some types are also in VAR_DOMAIN. */
3987 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3991 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
3995 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4010 static struct compunit_symtab
*
4011 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
4012 const char *name
, domain_enum domain
)
4014 struct compunit_symtab
*stab_best
= NULL
;
4015 struct dwarf2_per_objfile
*dwarf2_per_objfile
4016 = get_dwarf2_per_objfile (objfile
);
4018 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
4020 struct dw2_symtab_iterator iter
;
4021 struct dwarf2_per_cu_data
*per_cu
;
4023 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 1, block_index
, domain
, name
);
4025 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4027 struct symbol
*sym
, *with_opaque
= NULL
;
4028 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
4029 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
4030 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
4032 sym
= block_find_symbol (block
, name
, domain
,
4033 block_find_non_opaque_type_preferred
,
4036 /* Some caution must be observed with overloaded functions
4037 and methods, since the index will not contain any overload
4038 information (but NAME might contain it). */
4041 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
4043 if (with_opaque
!= NULL
4044 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
4047 /* Keep looking through other CUs. */
4054 dw2_print_stats (struct objfile
*objfile
)
4056 struct dwarf2_per_objfile
*dwarf2_per_objfile
4057 = get_dwarf2_per_objfile (objfile
);
4058 int total
= (dwarf2_per_objfile
->all_comp_units
.size ()
4059 + dwarf2_per_objfile
->all_type_units
.size ());
4062 for (int i
= 0; i
< total
; ++i
)
4064 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4066 if (!per_cu
->v
.quick
->compunit_symtab
)
4069 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
4070 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
4073 /* This dumps minimal information about the index.
4074 It is called via "mt print objfiles".
4075 One use is to verify .gdb_index has been loaded by the
4076 gdb.dwarf2/gdb-index.exp testcase. */
4079 dw2_dump (struct objfile
*objfile
)
4081 struct dwarf2_per_objfile
*dwarf2_per_objfile
4082 = get_dwarf2_per_objfile (objfile
);
4084 gdb_assert (dwarf2_per_objfile
->using_index
);
4085 printf_filtered (".gdb_index:");
4086 if (dwarf2_per_objfile
->index_table
!= NULL
)
4088 printf_filtered (" version %d\n",
4089 dwarf2_per_objfile
->index_table
->version
);
4092 printf_filtered (" faked for \"readnow\"\n");
4093 printf_filtered ("\n");
4097 dw2_relocate (struct objfile
*objfile
,
4098 const struct section_offsets
*new_offsets
,
4099 const struct section_offsets
*delta
)
4101 /* There's nothing to relocate here. */
4105 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
4106 const char *func_name
)
4108 struct dwarf2_per_objfile
*dwarf2_per_objfile
4109 = get_dwarf2_per_objfile (objfile
);
4111 struct dw2_symtab_iterator iter
;
4112 struct dwarf2_per_cu_data
*per_cu
;
4114 /* Note: It doesn't matter what we pass for block_index here. */
4115 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
4118 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4119 dw2_instantiate_symtab (per_cu
, false);
4124 dw2_expand_all_symtabs (struct objfile
*objfile
)
4126 struct dwarf2_per_objfile
*dwarf2_per_objfile
4127 = get_dwarf2_per_objfile (objfile
);
4128 int total_units
= (dwarf2_per_objfile
->all_comp_units
.size ()
4129 + dwarf2_per_objfile
->all_type_units
.size ());
4131 for (int i
= 0; i
< total_units
; ++i
)
4133 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4135 /* We don't want to directly expand a partial CU, because if we
4136 read it with the wrong language, then assertion failures can
4137 be triggered later on. See PR symtab/23010. So, tell
4138 dw2_instantiate_symtab to skip partial CUs -- any important
4139 partial CU will be read via DW_TAG_imported_unit anyway. */
4140 dw2_instantiate_symtab (per_cu
, true);
4145 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
4146 const char *fullname
)
4148 struct dwarf2_per_objfile
*dwarf2_per_objfile
4149 = get_dwarf2_per_objfile (objfile
);
4151 /* We don't need to consider type units here.
4152 This is only called for examining code, e.g. expand_line_sal.
4153 There can be an order of magnitude (or more) more type units
4154 than comp units, and we avoid them if we can. */
4156 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4158 /* We only need to look at symtabs not already expanded. */
4159 if (per_cu
->v
.quick
->compunit_symtab
)
4162 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4163 if (file_data
== NULL
)
4166 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4168 const char *this_fullname
= file_data
->file_names
[j
];
4170 if (filename_cmp (this_fullname
, fullname
) == 0)
4172 dw2_instantiate_symtab (per_cu
, false);
4180 dw2_map_matching_symbols (struct objfile
*objfile
,
4181 const char * name
, domain_enum domain
,
4183 int (*callback
) (struct block
*,
4184 struct symbol
*, void *),
4185 void *data
, symbol_name_match_type match
,
4186 symbol_compare_ftype
*ordered_compare
)
4188 /* Currently unimplemented; used for Ada. The function can be called if the
4189 current language is Ada for a non-Ada objfile using GNU index. As Ada
4190 does not look for non-Ada symbols this function should just return. */
4193 /* Symbol name matcher for .gdb_index names.
4195 Symbol names in .gdb_index have a few particularities:
4197 - There's no indication of which is the language of each symbol.
4199 Since each language has its own symbol name matching algorithm,
4200 and we don't know which language is the right one, we must match
4201 each symbol against all languages. This would be a potential
4202 performance problem if it were not mitigated by the
4203 mapped_index::name_components lookup table, which significantly
4204 reduces the number of times we need to call into this matcher,
4205 making it a non-issue.
4207 - Symbol names in the index have no overload (parameter)
4208 information. I.e., in C++, "foo(int)" and "foo(long)" both
4209 appear as "foo" in the index, for example.
4211 This means that the lookup names passed to the symbol name
4212 matcher functions must have no parameter information either
4213 because (e.g.) symbol search name "foo" does not match
4214 lookup-name "foo(int)" [while swapping search name for lookup
4217 class gdb_index_symbol_name_matcher
4220 /* Prepares the vector of comparison functions for LOOKUP_NAME. */
4221 gdb_index_symbol_name_matcher (const lookup_name_info
&lookup_name
);
4223 /* Walk all the matcher routines and match SYMBOL_NAME against them.
4224 Returns true if any matcher matches. */
4225 bool matches (const char *symbol_name
);
4228 /* A reference to the lookup name we're matching against. */
4229 const lookup_name_info
&m_lookup_name
;
4231 /* A vector holding all the different symbol name matchers, for all
4233 std::vector
<symbol_name_matcher_ftype
*> m_symbol_name_matcher_funcs
;
4236 gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher
4237 (const lookup_name_info
&lookup_name
)
4238 : m_lookup_name (lookup_name
)
4240 /* Prepare the vector of comparison functions upfront, to avoid
4241 doing the same work for each symbol. Care is taken to avoid
4242 matching with the same matcher more than once if/when multiple
4243 languages use the same matcher function. */
4244 auto &matchers
= m_symbol_name_matcher_funcs
;
4245 matchers
.reserve (nr_languages
);
4247 matchers
.push_back (default_symbol_name_matcher
);
4249 for (int i
= 0; i
< nr_languages
; i
++)
4251 const language_defn
*lang
= language_def ((enum language
) i
);
4252 symbol_name_matcher_ftype
*name_matcher
4253 = get_symbol_name_matcher (lang
, m_lookup_name
);
4255 /* Don't insert the same comparison routine more than once.
4256 Note that we do this linear walk instead of a seemingly
4257 cheaper sorted insert, or use a std::set or something like
4258 that, because relative order of function addresses is not
4259 stable. This is not a problem in practice because the number
4260 of supported languages is low, and the cost here is tiny
4261 compared to the number of searches we'll do afterwards using
4263 if (name_matcher
!= default_symbol_name_matcher
4264 && (std::find (matchers
.begin (), matchers
.end (), name_matcher
)
4265 == matchers
.end ()))
4266 matchers
.push_back (name_matcher
);
4271 gdb_index_symbol_name_matcher::matches (const char *symbol_name
)
4273 for (auto matches_name
: m_symbol_name_matcher_funcs
)
4274 if (matches_name (symbol_name
, m_lookup_name
, NULL
))
4280 /* Starting from a search name, return the string that finds the upper
4281 bound of all strings that start with SEARCH_NAME in a sorted name
4282 list. Returns the empty string to indicate that the upper bound is
4283 the end of the list. */
4286 make_sort_after_prefix_name (const char *search_name
)
4288 /* When looking to complete "func", we find the upper bound of all
4289 symbols that start with "func" by looking for where we'd insert
4290 the closest string that would follow "func" in lexicographical
4291 order. Usually, that's "func"-with-last-character-incremented,
4292 i.e. "fund". Mind non-ASCII characters, though. Usually those
4293 will be UTF-8 multi-byte sequences, but we can't be certain.
4294 Especially mind the 0xff character, which is a valid character in
4295 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
4296 rule out compilers allowing it in identifiers. Note that
4297 conveniently, strcmp/strcasecmp are specified to compare
4298 characters interpreted as unsigned char. So what we do is treat
4299 the whole string as a base 256 number composed of a sequence of
4300 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
4301 to 0, and carries 1 to the following more-significant position.
4302 If the very first character in SEARCH_NAME ends up incremented
4303 and carries/overflows, then the upper bound is the end of the
4304 list. The string after the empty string is also the empty
4307 Some examples of this operation:
4309 SEARCH_NAME => "+1" RESULT
4313 "\xff" "a" "\xff" => "\xff" "b"
4318 Then, with these symbols for example:
4324 completing "func" looks for symbols between "func" and
4325 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
4326 which finds "func" and "func1", but not "fund".
4330 funcÿ (Latin1 'ÿ' [0xff])
4334 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
4335 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
4339 ÿÿ (Latin1 'ÿ' [0xff])
4342 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
4343 the end of the list.
4345 std::string after
= search_name
;
4346 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
4348 if (!after
.empty ())
4349 after
.back () = (unsigned char) after
.back () + 1;
4353 /* See declaration. */
4355 std::pair
<std::vector
<name_component
>::const_iterator
,
4356 std::vector
<name_component
>::const_iterator
>
4357 mapped_index_base::find_name_components_bounds
4358 (const lookup_name_info
&lookup_name_without_params
) const
4361 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4364 = lookup_name_without_params
.cplus ().lookup_name ().c_str ();
4366 /* Comparison function object for lower_bound that matches against a
4367 given symbol name. */
4368 auto lookup_compare_lower
= [&] (const name_component
&elem
,
4371 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4372 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4373 return name_cmp (elem_name
, name
) < 0;
4376 /* Comparison function object for upper_bound that matches against a
4377 given symbol name. */
4378 auto lookup_compare_upper
= [&] (const char *name
,
4379 const name_component
&elem
)
4381 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4382 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4383 return name_cmp (name
, elem_name
) < 0;
4386 auto begin
= this->name_components
.begin ();
4387 auto end
= this->name_components
.end ();
4389 /* Find the lower bound. */
4392 if (lookup_name_without_params
.completion_mode () && cplus
[0] == '\0')
4395 return std::lower_bound (begin
, end
, cplus
, lookup_compare_lower
);
4398 /* Find the upper bound. */
4401 if (lookup_name_without_params
.completion_mode ())
4403 /* In completion mode, we want UPPER to point past all
4404 symbols names that have the same prefix. I.e., with
4405 these symbols, and completing "func":
4407 function << lower bound
4409 other_function << upper bound
4411 We find the upper bound by looking for the insertion
4412 point of "func"-with-last-character-incremented,
4414 std::string after
= make_sort_after_prefix_name (cplus
);
4417 return std::lower_bound (lower
, end
, after
.c_str (),
4418 lookup_compare_lower
);
4421 return std::upper_bound (lower
, end
, cplus
, lookup_compare_upper
);
4424 return {lower
, upper
};
4427 /* See declaration. */
4430 mapped_index_base::build_name_components ()
4432 if (!this->name_components
.empty ())
4435 this->name_components_casing
= case_sensitivity
;
4437 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4439 /* The code below only knows how to break apart components of C++
4440 symbol names (and other languages that use '::' as
4441 namespace/module separator). If we add support for wild matching
4442 to some language that uses some other operator (E.g., Ada, Go and
4443 D use '.'), then we'll need to try splitting the symbol name
4444 according to that language too. Note that Ada does support wild
4445 matching, but doesn't currently support .gdb_index. */
4446 auto count
= this->symbol_name_count ();
4447 for (offset_type idx
= 0; idx
< count
; idx
++)
4449 if (this->symbol_name_slot_invalid (idx
))
4452 const char *name
= this->symbol_name_at (idx
);
4454 /* Add each name component to the name component table. */
4455 unsigned int previous_len
= 0;
4456 for (unsigned int current_len
= cp_find_first_component (name
);
4457 name
[current_len
] != '\0';
4458 current_len
+= cp_find_first_component (name
+ current_len
))
4460 gdb_assert (name
[current_len
] == ':');
4461 this->name_components
.push_back ({previous_len
, idx
});
4462 /* Skip the '::'. */
4464 previous_len
= current_len
;
4466 this->name_components
.push_back ({previous_len
, idx
});
4469 /* Sort name_components elements by name. */
4470 auto name_comp_compare
= [&] (const name_component
&left
,
4471 const name_component
&right
)
4473 const char *left_qualified
= this->symbol_name_at (left
.idx
);
4474 const char *right_qualified
= this->symbol_name_at (right
.idx
);
4476 const char *left_name
= left_qualified
+ left
.name_offset
;
4477 const char *right_name
= right_qualified
+ right
.name_offset
;
4479 return name_cmp (left_name
, right_name
) < 0;
4482 std::sort (this->name_components
.begin (),
4483 this->name_components
.end (),
4487 /* Helper for dw2_expand_symtabs_matching that works with a
4488 mapped_index_base instead of the containing objfile. This is split
4489 to a separate function in order to be able to unit test the
4490 name_components matching using a mock mapped_index_base. For each
4491 symbol name that matches, calls MATCH_CALLBACK, passing it the
4492 symbol's index in the mapped_index_base symbol table. */
4495 dw2_expand_symtabs_matching_symbol
4496 (mapped_index_base
&index
,
4497 const lookup_name_info
&lookup_name_in
,
4498 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4499 enum search_domain kind
,
4500 gdb::function_view
<void (offset_type
)> match_callback
)
4502 lookup_name_info lookup_name_without_params
4503 = lookup_name_in
.make_ignore_params ();
4504 gdb_index_symbol_name_matcher lookup_name_matcher
4505 (lookup_name_without_params
);
4507 /* Build the symbol name component sorted vector, if we haven't
4509 index
.build_name_components ();
4511 auto bounds
= index
.find_name_components_bounds (lookup_name_without_params
);
4513 /* Now for each symbol name in range, check to see if we have a name
4514 match, and if so, call the MATCH_CALLBACK callback. */
4516 /* The same symbol may appear more than once in the range though.
4517 E.g., if we're looking for symbols that complete "w", and we have
4518 a symbol named "w1::w2", we'll find the two name components for
4519 that same symbol in the range. To be sure we only call the
4520 callback once per symbol, we first collect the symbol name
4521 indexes that matched in a temporary vector and ignore
4523 std::vector
<offset_type
> matches
;
4524 matches
.reserve (std::distance (bounds
.first
, bounds
.second
));
4526 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4528 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4530 if (!lookup_name_matcher
.matches (qualified
)
4531 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4534 matches
.push_back (bounds
.first
->idx
);
4537 std::sort (matches
.begin (), matches
.end ());
4539 /* Finally call the callback, once per match. */
4541 for (offset_type idx
: matches
)
4545 match_callback (idx
);
4550 /* Above we use a type wider than idx's for 'prev', since 0 and
4551 (offset_type)-1 are both possible values. */
4552 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4557 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4559 /* A mock .gdb_index/.debug_names-like name index table, enough to
4560 exercise dw2_expand_symtabs_matching_symbol, which works with the
4561 mapped_index_base interface. Builds an index from the symbol list
4562 passed as parameter to the constructor. */
4563 class mock_mapped_index
: public mapped_index_base
4566 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4567 : m_symbol_table (symbols
)
4570 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4572 /* Return the number of names in the symbol table. */
4573 size_t symbol_name_count () const override
4575 return m_symbol_table
.size ();
4578 /* Get the name of the symbol at IDX in the symbol table. */
4579 const char *symbol_name_at (offset_type idx
) const override
4581 return m_symbol_table
[idx
];
4585 gdb::array_view
<const char *> m_symbol_table
;
4588 /* Convenience function that converts a NULL pointer to a "<null>"
4589 string, to pass to print routines. */
4592 string_or_null (const char *str
)
4594 return str
!= NULL
? str
: "<null>";
4597 /* Check if a lookup_name_info built from
4598 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4599 index. EXPECTED_LIST is the list of expected matches, in expected
4600 matching order. If no match expected, then an empty list is
4601 specified. Returns true on success. On failure prints a warning
4602 indicating the file:line that failed, and returns false. */
4605 check_match (const char *file
, int line
,
4606 mock_mapped_index
&mock_index
,
4607 const char *name
, symbol_name_match_type match_type
,
4608 bool completion_mode
,
4609 std::initializer_list
<const char *> expected_list
)
4611 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4613 bool matched
= true;
4615 auto mismatch
= [&] (const char *expected_str
,
4618 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4619 "expected=\"%s\", got=\"%s\"\n"),
4621 (match_type
== symbol_name_match_type::FULL
4623 name
, string_or_null (expected_str
), string_or_null (got
));
4627 auto expected_it
= expected_list
.begin ();
4628 auto expected_end
= expected_list
.end ();
4630 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4632 [&] (offset_type idx
)
4634 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4635 const char *expected_str
4636 = expected_it
== expected_end
? NULL
: *expected_it
++;
4638 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4639 mismatch (expected_str
, matched_name
);
4642 const char *expected_str
4643 = expected_it
== expected_end
? NULL
: *expected_it
++;
4644 if (expected_str
!= NULL
)
4645 mismatch (expected_str
, NULL
);
4650 /* The symbols added to the mock mapped_index for testing (in
4652 static const char *test_symbols
[] = {
4661 "ns2::tmpl<int>::foo2",
4662 "(anonymous namespace)::A::B::C",
4664 /* These are used to check that the increment-last-char in the
4665 matching algorithm for completion doesn't match "t1_fund" when
4666 completing "t1_func". */
4672 /* A UTF-8 name with multi-byte sequences to make sure that
4673 cp-name-parser understands this as a single identifier ("função"
4674 is "function" in PT). */
4677 /* \377 (0xff) is Latin1 'ÿ'. */
4680 /* \377 (0xff) is Latin1 'ÿ'. */
4684 /* A name with all sorts of complications. Starts with "z" to make
4685 it easier for the completion tests below. */
4686 #define Z_SYM_NAME \
4687 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4688 "::tuple<(anonymous namespace)::ui*, " \
4689 "std::default_delete<(anonymous namespace)::ui>, void>"
4694 /* Returns true if the mapped_index_base::find_name_component_bounds
4695 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4696 in completion mode. */
4699 check_find_bounds_finds (mapped_index_base
&index
,
4700 const char *search_name
,
4701 gdb::array_view
<const char *> expected_syms
)
4703 lookup_name_info
lookup_name (search_name
,
4704 symbol_name_match_type::FULL
, true);
4706 auto bounds
= index
.find_name_components_bounds (lookup_name
);
4708 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4709 if (distance
!= expected_syms
.size ())
4712 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4714 auto nc_elem
= bounds
.first
+ exp_elem
;
4715 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4716 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4723 /* Test the lower-level mapped_index::find_name_component_bounds
4727 test_mapped_index_find_name_component_bounds ()
4729 mock_mapped_index
mock_index (test_symbols
);
4731 mock_index
.build_name_components ();
4733 /* Test the lower-level mapped_index::find_name_component_bounds
4734 method in completion mode. */
4736 static const char *expected_syms
[] = {
4741 SELF_CHECK (check_find_bounds_finds (mock_index
,
4742 "t1_func", expected_syms
));
4745 /* Check that the increment-last-char in the name matching algorithm
4746 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4748 static const char *expected_syms1
[] = {
4752 SELF_CHECK (check_find_bounds_finds (mock_index
,
4753 "\377", expected_syms1
));
4755 static const char *expected_syms2
[] = {
4758 SELF_CHECK (check_find_bounds_finds (mock_index
,
4759 "\377\377", expected_syms2
));
4763 /* Test dw2_expand_symtabs_matching_symbol. */
4766 test_dw2_expand_symtabs_matching_symbol ()
4768 mock_mapped_index
mock_index (test_symbols
);
4770 /* We let all tests run until the end even if some fails, for debug
4772 bool any_mismatch
= false;
4774 /* Create the expected symbols list (an initializer_list). Needed
4775 because lists have commas, and we need to pass them to CHECK,
4776 which is a macro. */
4777 #define EXPECT(...) { __VA_ARGS__ }
4779 /* Wrapper for check_match that passes down the current
4780 __FILE__/__LINE__. */
4781 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4782 any_mismatch |= !check_match (__FILE__, __LINE__, \
4784 NAME, MATCH_TYPE, COMPLETION_MODE, \
4787 /* Identity checks. */
4788 for (const char *sym
: test_symbols
)
4790 /* Should be able to match all existing symbols. */
4791 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4794 /* Should be able to match all existing symbols with
4796 std::string with_params
= std::string (sym
) + "(int)";
4797 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4800 /* Should be able to match all existing symbols with
4801 parameters and qualifiers. */
4802 with_params
= std::string (sym
) + " ( int ) const";
4803 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4806 /* This should really find sym, but cp-name-parser.y doesn't
4807 know about lvalue/rvalue qualifiers yet. */
4808 with_params
= std::string (sym
) + " ( int ) &&";
4809 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4813 /* Check that the name matching algorithm for completion doesn't get
4814 confused with Latin1 'ÿ' / 0xff. */
4816 static const char str
[] = "\377";
4817 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4818 EXPECT ("\377", "\377\377123"));
4821 /* Check that the increment-last-char in the matching algorithm for
4822 completion doesn't match "t1_fund" when completing "t1_func". */
4824 static const char str
[] = "t1_func";
4825 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4826 EXPECT ("t1_func", "t1_func1"));
4829 /* Check that completion mode works at each prefix of the expected
4832 static const char str
[] = "function(int)";
4833 size_t len
= strlen (str
);
4836 for (size_t i
= 1; i
< len
; i
++)
4838 lookup
.assign (str
, i
);
4839 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4840 EXPECT ("function"));
4844 /* While "w" is a prefix of both components, the match function
4845 should still only be called once. */
4847 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4849 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4853 /* Same, with a "complicated" symbol. */
4855 static const char str
[] = Z_SYM_NAME
;
4856 size_t len
= strlen (str
);
4859 for (size_t i
= 1; i
< len
; i
++)
4861 lookup
.assign (str
, i
);
4862 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4863 EXPECT (Z_SYM_NAME
));
4867 /* In FULL mode, an incomplete symbol doesn't match. */
4869 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4873 /* A complete symbol with parameters matches any overload, since the
4874 index has no overload info. */
4876 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4877 EXPECT ("std::zfunction", "std::zfunction2"));
4878 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4879 EXPECT ("std::zfunction", "std::zfunction2"));
4880 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4881 EXPECT ("std::zfunction", "std::zfunction2"));
4884 /* Check that whitespace is ignored appropriately. A symbol with a
4885 template argument list. */
4887 static const char expected
[] = "ns::foo<int>";
4888 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4890 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4894 /* Check that whitespace is ignored appropriately. A symbol with a
4895 template argument list that includes a pointer. */
4897 static const char expected
[] = "ns::foo<char*>";
4898 /* Try both completion and non-completion modes. */
4899 static const bool completion_mode
[2] = {false, true};
4900 for (size_t i
= 0; i
< 2; i
++)
4902 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4903 completion_mode
[i
], EXPECT (expected
));
4904 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4905 completion_mode
[i
], EXPECT (expected
));
4907 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4908 completion_mode
[i
], EXPECT (expected
));
4909 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4910 completion_mode
[i
], EXPECT (expected
));
4915 /* Check method qualifiers are ignored. */
4916 static const char expected
[] = "ns::foo<char*>";
4917 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4918 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4919 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4920 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4921 CHECK_MATCH ("foo < char * > ( int ) const",
4922 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4923 CHECK_MATCH ("foo < char * > ( int ) &&",
4924 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4927 /* Test lookup names that don't match anything. */
4929 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4932 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4936 /* Some wild matching tests, exercising "(anonymous namespace)",
4937 which should not be confused with a parameter list. */
4939 static const char *syms
[] = {
4943 "A :: B :: C ( int )",
4948 for (const char *s
: syms
)
4950 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4951 EXPECT ("(anonymous namespace)::A::B::C"));
4956 static const char expected
[] = "ns2::tmpl<int>::foo2";
4957 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4959 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4963 SELF_CHECK (!any_mismatch
);
4972 test_mapped_index_find_name_component_bounds ();
4973 test_dw2_expand_symtabs_matching_symbol ();
4976 }} // namespace selftests::dw2_expand_symtabs_matching
4978 #endif /* GDB_SELF_TEST */
4980 /* If FILE_MATCHER is NULL or if PER_CU has
4981 dwarf2_per_cu_quick_data::MARK set (see
4982 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4983 EXPANSION_NOTIFY on it. */
4986 dw2_expand_symtabs_matching_one
4987 (struct dwarf2_per_cu_data
*per_cu
,
4988 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4989 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4991 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
4993 bool symtab_was_null
4994 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
4996 dw2_instantiate_symtab (per_cu
, false);
4998 if (expansion_notify
!= NULL
5000 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
5001 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
5005 /* Helper for dw2_expand_matching symtabs. Called on each symbol
5006 matched, to expand corresponding CUs that were marked. IDX is the
5007 index of the symbol name that matched. */
5010 dw2_expand_marked_cus
5011 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
5012 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5013 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5016 offset_type
*vec
, vec_len
, vec_idx
;
5017 bool global_seen
= false;
5018 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5020 vec
= (offset_type
*) (index
.constant_pool
5021 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
5022 vec_len
= MAYBE_SWAP (vec
[0]);
5023 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
5025 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
5026 /* This value is only valid for index versions >= 7. */
5027 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
5028 gdb_index_symbol_kind symbol_kind
=
5029 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
5030 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
5031 /* Only check the symbol attributes if they're present.
5032 Indices prior to version 7 don't record them,
5033 and indices >= 7 may elide them for certain symbols
5034 (gold does this). */
5037 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
5039 /* Work around gold/15646. */
5042 if (!is_static
&& global_seen
)
5048 /* Only check the symbol's kind if it has one. */
5053 case VARIABLES_DOMAIN
:
5054 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
5057 case FUNCTIONS_DOMAIN
:
5058 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
5062 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
5070 /* Don't crash on bad data. */
5071 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
5072 + dwarf2_per_objfile
->all_type_units
.size ()))
5074 complaint (_(".gdb_index entry has bad CU index"
5076 objfile_name (dwarf2_per_objfile
->objfile
));
5080 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
5081 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5086 /* If FILE_MATCHER is non-NULL, set all the
5087 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
5088 that match FILE_MATCHER. */
5091 dw_expand_symtabs_matching_file_matcher
5092 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5093 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
5095 if (file_matcher
== NULL
)
5098 objfile
*const objfile
= dwarf2_per_objfile
->objfile
;
5100 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
5102 NULL
, xcalloc
, xfree
));
5103 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
5105 NULL
, xcalloc
, xfree
));
5107 /* The rule is CUs specify all the files, including those used by
5108 any TU, so there's no need to scan TUs here. */
5110 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5114 per_cu
->v
.quick
->mark
= 0;
5116 /* We only need to look at symtabs not already expanded. */
5117 if (per_cu
->v
.quick
->compunit_symtab
)
5120 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5121 if (file_data
== NULL
)
5124 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
5126 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
5128 per_cu
->v
.quick
->mark
= 1;
5132 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5134 const char *this_real_name
;
5136 if (file_matcher (file_data
->file_names
[j
], false))
5138 per_cu
->v
.quick
->mark
= 1;
5142 /* Before we invoke realpath, which can get expensive when many
5143 files are involved, do a quick comparison of the basenames. */
5144 if (!basenames_may_differ
5145 && !file_matcher (lbasename (file_data
->file_names
[j
]),
5149 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
5150 if (file_matcher (this_real_name
, false))
5152 per_cu
->v
.quick
->mark
= 1;
5157 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
5158 ? visited_found
.get ()
5159 : visited_not_found
.get (),
5166 dw2_expand_symtabs_matching
5167 (struct objfile
*objfile
,
5168 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5169 const lookup_name_info
&lookup_name
,
5170 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5171 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5172 enum search_domain kind
)
5174 struct dwarf2_per_objfile
*dwarf2_per_objfile
5175 = get_dwarf2_per_objfile (objfile
);
5177 /* index_table is NULL if OBJF_READNOW. */
5178 if (!dwarf2_per_objfile
->index_table
)
5181 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5183 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5185 dw2_expand_symtabs_matching_symbol (index
, lookup_name
,
5187 kind
, [&] (offset_type idx
)
5189 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
5190 expansion_notify
, kind
);
5194 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
5197 static struct compunit_symtab
*
5198 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
5203 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
5204 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
5207 if (cust
->includes
== NULL
)
5210 for (i
= 0; cust
->includes
[i
]; ++i
)
5212 struct compunit_symtab
*s
= cust
->includes
[i
];
5214 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
5222 static struct compunit_symtab
*
5223 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
5224 struct bound_minimal_symbol msymbol
,
5226 struct obj_section
*section
,
5229 struct dwarf2_per_cu_data
*data
;
5230 struct compunit_symtab
*result
;
5232 if (!objfile
->psymtabs_addrmap
)
5235 data
= (struct dwarf2_per_cu_data
*) addrmap_find (objfile
->psymtabs_addrmap
,
5240 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
5241 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
5242 paddress (get_objfile_arch (objfile
), pc
));
5245 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
,
5248 gdb_assert (result
!= NULL
);
5253 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
5254 void *data
, int need_fullname
)
5256 struct dwarf2_per_objfile
*dwarf2_per_objfile
5257 = get_dwarf2_per_objfile (objfile
);
5259 if (!dwarf2_per_objfile
->filenames_cache
)
5261 dwarf2_per_objfile
->filenames_cache
.emplace ();
5263 htab_up
visited (htab_create_alloc (10,
5264 htab_hash_pointer
, htab_eq_pointer
,
5265 NULL
, xcalloc
, xfree
));
5267 /* The rule is CUs specify all the files, including those used
5268 by any TU, so there's no need to scan TUs here. We can
5269 ignore file names coming from already-expanded CUs. */
5271 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5273 if (per_cu
->v
.quick
->compunit_symtab
)
5275 void **slot
= htab_find_slot (visited
.get (),
5276 per_cu
->v
.quick
->file_names
,
5279 *slot
= per_cu
->v
.quick
->file_names
;
5283 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5285 /* We only need to look at symtabs not already expanded. */
5286 if (per_cu
->v
.quick
->compunit_symtab
)
5289 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5290 if (file_data
== NULL
)
5293 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
5296 /* Already visited. */
5301 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5303 const char *filename
= file_data
->file_names
[j
];
5304 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
5309 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
5311 gdb::unique_xmalloc_ptr
<char> this_real_name
;
5314 this_real_name
= gdb_realpath (filename
);
5315 (*fun
) (filename
, this_real_name
.get (), data
);
5320 dw2_has_symbols (struct objfile
*objfile
)
5325 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
5328 dw2_find_last_source_symtab
,
5329 dw2_forget_cached_source_info
,
5330 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
,
6148 dw2_debug_names_expand_symtabs_for_function
,
6149 dw2_expand_all_symtabs
,
6150 dw2_expand_symtabs_with_fullname
,
6151 dw2_map_matching_symbols
,
6152 dw2_debug_names_expand_symtabs_matching
,
6153 dw2_find_pc_sect_compunit_symtab
,
6155 dw2_map_symbol_filenames
6158 /* See symfile.h. */
6161 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
6163 struct dwarf2_per_objfile
*dwarf2_per_objfile
6164 = get_dwarf2_per_objfile (objfile
);
6166 /* If we're about to read full symbols, don't bother with the
6167 indices. In this case we also don't care if some other debug
6168 format is making psymtabs, because they are all about to be
6170 if ((objfile
->flags
& OBJF_READNOW
))
6172 dwarf2_per_objfile
->using_index
= 1;
6173 create_all_comp_units (dwarf2_per_objfile
);
6174 create_all_type_units (dwarf2_per_objfile
);
6175 dwarf2_per_objfile
->quick_file_names_table
6176 = create_quick_file_names_table
6177 (dwarf2_per_objfile
->all_comp_units
.size ());
6179 for (int i
= 0; i
< (dwarf2_per_objfile
->all_comp_units
.size ()
6180 + dwarf2_per_objfile
->all_type_units
.size ()); ++i
)
6182 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
6184 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6185 struct dwarf2_per_cu_quick_data
);
6188 /* Return 1 so that gdb sees the "quick" functions. However,
6189 these functions will be no-ops because we will have expanded
6191 *index_kind
= dw_index_kind::GDB_INDEX
;
6195 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
6197 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6201 if (dwarf2_read_index (dwarf2_per_objfile
))
6203 *index_kind
= dw_index_kind::GDB_INDEX
;
6212 /* Build a partial symbol table. */
6215 dwarf2_build_psymtabs (struct objfile
*objfile
)
6217 struct dwarf2_per_objfile
*dwarf2_per_objfile
6218 = get_dwarf2_per_objfile (objfile
);
6220 if (objfile
->global_psymbols
.capacity () == 0
6221 && objfile
->static_psymbols
.capacity () == 0)
6222 init_psymbol_list (objfile
, 1024);
6226 /* This isn't really ideal: all the data we allocate on the
6227 objfile's obstack is still uselessly kept around. However,
6228 freeing it seems unsafe. */
6229 psymtab_discarder
psymtabs (objfile
);
6230 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
6233 CATCH (except
, RETURN_MASK_ERROR
)
6235 exception_print (gdb_stderr
, except
);
6240 /* Return the total length of the CU described by HEADER. */
6243 get_cu_length (const struct comp_unit_head
*header
)
6245 return header
->initial_length_size
+ header
->length
;
6248 /* Return TRUE if SECT_OFF is within CU_HEADER. */
6251 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
6253 sect_offset bottom
= cu_header
->sect_off
;
6254 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
6256 return sect_off
>= bottom
&& sect_off
< top
;
6259 /* Find the base address of the compilation unit for range lists and
6260 location lists. It will normally be specified by DW_AT_low_pc.
6261 In DWARF-3 draft 4, the base address could be overridden by
6262 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6263 compilation units with discontinuous ranges. */
6266 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6268 struct attribute
*attr
;
6271 cu
->base_address
= 0;
6273 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6276 cu
->base_address
= attr_value_as_address (attr
);
6281 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6284 cu
->base_address
= attr_value_as_address (attr
);
6290 /* Read in the comp unit header information from the debug_info at info_ptr.
6291 Use rcuh_kind::COMPILE as the default type if not known by the caller.
6292 NOTE: This leaves members offset, first_die_offset to be filled in
6295 static const gdb_byte
*
6296 read_comp_unit_head (struct comp_unit_head
*cu_header
,
6297 const gdb_byte
*info_ptr
,
6298 struct dwarf2_section_info
*section
,
6299 rcuh_kind section_kind
)
6302 unsigned int bytes_read
;
6303 const char *filename
= get_section_file_name (section
);
6304 bfd
*abfd
= get_section_bfd_owner (section
);
6306 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
6307 cu_header
->initial_length_size
= bytes_read
;
6308 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
6309 info_ptr
+= bytes_read
;
6310 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
6312 if (cu_header
->version
< 5)
6313 switch (section_kind
)
6315 case rcuh_kind::COMPILE
:
6316 cu_header
->unit_type
= DW_UT_compile
;
6318 case rcuh_kind::TYPE
:
6319 cu_header
->unit_type
= DW_UT_type
;
6322 internal_error (__FILE__
, __LINE__
,
6323 _("read_comp_unit_head: invalid section_kind"));
6327 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
6328 (read_1_byte (abfd
, info_ptr
));
6330 switch (cu_header
->unit_type
)
6333 if (section_kind
!= rcuh_kind::COMPILE
)
6334 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6335 "(is DW_UT_compile, should be DW_UT_type) [in module %s]"),
6339 section_kind
= rcuh_kind::TYPE
;
6342 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6343 "(is %d, should be %d or %d) [in module %s]"),
6344 cu_header
->unit_type
, DW_UT_compile
, DW_UT_type
, filename
);
6347 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6350 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
6353 info_ptr
+= bytes_read
;
6354 if (cu_header
->version
< 5)
6356 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6359 signed_addr
= bfd_get_sign_extend_vma (abfd
);
6360 if (signed_addr
< 0)
6361 internal_error (__FILE__
, __LINE__
,
6362 _("read_comp_unit_head: dwarf from non elf file"));
6363 cu_header
->signed_addr_p
= signed_addr
;
6365 if (section_kind
== rcuh_kind::TYPE
)
6367 LONGEST type_offset
;
6369 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
6372 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
6373 info_ptr
+= bytes_read
;
6374 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
6375 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
6376 error (_("Dwarf Error: Too big type_offset in compilation unit "
6377 "header (is %s) [in module %s]"), plongest (type_offset
),
6384 /* Helper function that returns the proper abbrev section for
6387 static struct dwarf2_section_info
*
6388 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6390 struct dwarf2_section_info
*abbrev
;
6391 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6393 if (this_cu
->is_dwz
)
6394 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
6396 abbrev
= &dwarf2_per_objfile
->abbrev
;
6401 /* Subroutine of read_and_check_comp_unit_head and
6402 read_and_check_type_unit_head to simplify them.
6403 Perform various error checking on the header. */
6406 error_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6407 struct comp_unit_head
*header
,
6408 struct dwarf2_section_info
*section
,
6409 struct dwarf2_section_info
*abbrev_section
)
6411 const char *filename
= get_section_file_name (section
);
6413 if (header
->version
< 2 || header
->version
> 5)
6414 error (_("Dwarf Error: wrong version in compilation unit header "
6415 "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header
->version
,
6418 if (to_underlying (header
->abbrev_sect_off
)
6419 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
6420 error (_("Dwarf Error: bad offset (%s) in compilation unit header "
6421 "(offset %s + 6) [in module %s]"),
6422 sect_offset_str (header
->abbrev_sect_off
),
6423 sect_offset_str (header
->sect_off
),
6426 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
6427 avoid potential 32-bit overflow. */
6428 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
6430 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
6431 "(offset %s + 0) [in module %s]"),
6432 header
->length
, sect_offset_str (header
->sect_off
),
6436 /* Read in a CU/TU header and perform some basic error checking.
6437 The contents of the header are stored in HEADER.
6438 The result is a pointer to the start of the first DIE. */
6440 static const gdb_byte
*
6441 read_and_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6442 struct comp_unit_head
*header
,
6443 struct dwarf2_section_info
*section
,
6444 struct dwarf2_section_info
*abbrev_section
,
6445 const gdb_byte
*info_ptr
,
6446 rcuh_kind section_kind
)
6448 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
6450 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
6452 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
6454 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
6456 error_check_comp_unit_head (dwarf2_per_objfile
, header
, section
,
6462 /* Fetch the abbreviation table offset from a comp or type unit header. */
6465 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6466 struct dwarf2_section_info
*section
,
6467 sect_offset sect_off
)
6469 bfd
*abfd
= get_section_bfd_owner (section
);
6470 const gdb_byte
*info_ptr
;
6471 unsigned int initial_length_size
, offset_size
;
6474 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
6475 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6476 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6477 offset_size
= initial_length_size
== 4 ? 4 : 8;
6478 info_ptr
+= initial_length_size
;
6480 version
= read_2_bytes (abfd
, info_ptr
);
6484 /* Skip unit type and address size. */
6488 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
6491 /* Allocate a new partial symtab for file named NAME and mark this new
6492 partial symtab as being an include of PST. */
6495 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
6496 struct objfile
*objfile
)
6498 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
6500 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6502 /* It shares objfile->objfile_obstack. */
6503 subpst
->dirname
= pst
->dirname
;
6506 subpst
->textlow
= 0;
6507 subpst
->texthigh
= 0;
6509 subpst
->dependencies
6510 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
6511 subpst
->dependencies
[0] = pst
;
6512 subpst
->number_of_dependencies
= 1;
6514 subpst
->globals_offset
= 0;
6515 subpst
->n_global_syms
= 0;
6516 subpst
->statics_offset
= 0;
6517 subpst
->n_static_syms
= 0;
6518 subpst
->compunit_symtab
= NULL
;
6519 subpst
->read_symtab
= pst
->read_symtab
;
6522 /* No private part is necessary for include psymtabs. This property
6523 can be used to differentiate between such include psymtabs and
6524 the regular ones. */
6525 subpst
->read_symtab_private
= NULL
;
6528 /* Read the Line Number Program data and extract the list of files
6529 included by the source file represented by PST. Build an include
6530 partial symtab for each of these included files. */
6533 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6534 struct die_info
*die
,
6535 struct partial_symtab
*pst
)
6538 struct attribute
*attr
;
6540 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6542 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6544 return; /* No linetable, so no includes. */
6546 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
6547 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
6551 hash_signatured_type (const void *item
)
6553 const struct signatured_type
*sig_type
6554 = (const struct signatured_type
*) item
;
6556 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6557 return sig_type
->signature
;
6561 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6563 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6564 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6566 return lhs
->signature
== rhs
->signature
;
6569 /* Allocate a hash table for signatured types. */
6572 allocate_signatured_type_table (struct objfile
*objfile
)
6574 return htab_create_alloc_ex (41,
6575 hash_signatured_type
,
6578 &objfile
->objfile_obstack
,
6579 hashtab_obstack_allocate
,
6580 dummy_obstack_deallocate
);
6583 /* A helper function to add a signatured type CU to a table. */
6586 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6588 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6589 std::vector
<signatured_type
*> *all_type_units
6590 = (std::vector
<signatured_type
*> *) datum
;
6592 all_type_units
->push_back (sigt
);
6597 /* A helper for create_debug_types_hash_table. Read types from SECTION
6598 and fill them into TYPES_HTAB. It will process only type units,
6599 therefore DW_UT_type. */
6602 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6603 struct dwo_file
*dwo_file
,
6604 dwarf2_section_info
*section
, htab_t
&types_htab
,
6605 rcuh_kind section_kind
)
6607 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6608 struct dwarf2_section_info
*abbrev_section
;
6610 const gdb_byte
*info_ptr
, *end_ptr
;
6612 abbrev_section
= (dwo_file
!= NULL
6613 ? &dwo_file
->sections
.abbrev
6614 : &dwarf2_per_objfile
->abbrev
);
6616 if (dwarf_read_debug
)
6617 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6618 get_section_name (section
),
6619 get_section_file_name (abbrev_section
));
6621 dwarf2_read_section (objfile
, section
);
6622 info_ptr
= section
->buffer
;
6624 if (info_ptr
== NULL
)
6627 /* We can't set abfd until now because the section may be empty or
6628 not present, in which case the bfd is unknown. */
6629 abfd
= get_section_bfd_owner (section
);
6631 /* We don't use init_cutu_and_read_dies_simple, or some such, here
6632 because we don't need to read any dies: the signature is in the
6635 end_ptr
= info_ptr
+ section
->size
;
6636 while (info_ptr
< end_ptr
)
6638 struct signatured_type
*sig_type
;
6639 struct dwo_unit
*dwo_tu
;
6641 const gdb_byte
*ptr
= info_ptr
;
6642 struct comp_unit_head header
;
6643 unsigned int length
;
6645 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6647 /* Initialize it due to a false compiler warning. */
6648 header
.signature
= -1;
6649 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6651 /* We need to read the type's signature in order to build the hash
6652 table, but we don't need anything else just yet. */
6654 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6655 abbrev_section
, ptr
, section_kind
);
6657 length
= get_cu_length (&header
);
6659 /* Skip dummy type units. */
6660 if (ptr
>= info_ptr
+ length
6661 || peek_abbrev_code (abfd
, ptr
) == 0
6662 || header
.unit_type
!= DW_UT_type
)
6668 if (types_htab
== NULL
)
6671 types_htab
= allocate_dwo_unit_table (objfile
);
6673 types_htab
= allocate_signatured_type_table (objfile
);
6679 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6681 dwo_tu
->dwo_file
= dwo_file
;
6682 dwo_tu
->signature
= header
.signature
;
6683 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6684 dwo_tu
->section
= section
;
6685 dwo_tu
->sect_off
= sect_off
;
6686 dwo_tu
->length
= length
;
6690 /* N.B.: type_offset is not usable if this type uses a DWO file.
6691 The real type_offset is in the DWO file. */
6693 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6694 struct signatured_type
);
6695 sig_type
->signature
= header
.signature
;
6696 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6697 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6698 sig_type
->per_cu
.is_debug_types
= 1;
6699 sig_type
->per_cu
.section
= section
;
6700 sig_type
->per_cu
.sect_off
= sect_off
;
6701 sig_type
->per_cu
.length
= length
;
6704 slot
= htab_find_slot (types_htab
,
6705 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6707 gdb_assert (slot
!= NULL
);
6710 sect_offset dup_sect_off
;
6714 const struct dwo_unit
*dup_tu
6715 = (const struct dwo_unit
*) *slot
;
6717 dup_sect_off
= dup_tu
->sect_off
;
6721 const struct signatured_type
*dup_tu
6722 = (const struct signatured_type
*) *slot
;
6724 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6727 complaint (_("debug type entry at offset %s is duplicate to"
6728 " the entry at offset %s, signature %s"),
6729 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6730 hex_string (header
.signature
));
6732 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6734 if (dwarf_read_debug
> 1)
6735 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6736 sect_offset_str (sect_off
),
6737 hex_string (header
.signature
));
6743 /* Create the hash table of all entries in the .debug_types
6744 (or .debug_types.dwo) section(s).
6745 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6746 otherwise it is NULL.
6748 The result is a pointer to the hash table or NULL if there are no types.
6750 Note: This function processes DWO files only, not DWP files. */
6753 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6754 struct dwo_file
*dwo_file
,
6755 VEC (dwarf2_section_info_def
) *types
,
6759 struct dwarf2_section_info
*section
;
6761 if (VEC_empty (dwarf2_section_info_def
, types
))
6765 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
6767 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, section
,
6768 types_htab
, rcuh_kind::TYPE
);
6771 /* Create the hash table of all entries in the .debug_types section,
6772 and initialize all_type_units.
6773 The result is zero if there is an error (e.g. missing .debug_types section),
6774 otherwise non-zero. */
6777 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6779 htab_t types_htab
= NULL
;
6781 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6782 &dwarf2_per_objfile
->info
, types_htab
,
6783 rcuh_kind::COMPILE
);
6784 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6785 dwarf2_per_objfile
->types
, types_htab
);
6786 if (types_htab
== NULL
)
6788 dwarf2_per_objfile
->signatured_types
= NULL
;
6792 dwarf2_per_objfile
->signatured_types
= types_htab
;
6794 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
6795 dwarf2_per_objfile
->all_type_units
.reserve (htab_elements (types_htab
));
6797 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
,
6798 &dwarf2_per_objfile
->all_type_units
);
6803 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6804 If SLOT is non-NULL, it is the entry to use in the hash table.
6805 Otherwise we find one. */
6807 static struct signatured_type
*
6808 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6811 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6813 if (dwarf2_per_objfile
->all_type_units
.size ()
6814 == dwarf2_per_objfile
->all_type_units
.capacity ())
6815 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6817 signatured_type
*sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6818 struct signatured_type
);
6820 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
6821 sig_type
->signature
= sig
;
6822 sig_type
->per_cu
.is_debug_types
= 1;
6823 if (dwarf2_per_objfile
->using_index
)
6825 sig_type
->per_cu
.v
.quick
=
6826 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6827 struct dwarf2_per_cu_quick_data
);
6832 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6835 gdb_assert (*slot
== NULL
);
6837 /* The rest of sig_type must be filled in by the caller. */
6841 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6842 Fill in SIG_ENTRY with DWO_ENTRY. */
6845 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6846 struct signatured_type
*sig_entry
,
6847 struct dwo_unit
*dwo_entry
)
6849 /* Make sure we're not clobbering something we don't expect to. */
6850 gdb_assert (! sig_entry
->per_cu
.queued
);
6851 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6852 if (dwarf2_per_objfile
->using_index
)
6854 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6855 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6858 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6859 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6860 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6861 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6862 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6864 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6865 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6866 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6867 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6868 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6869 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6870 sig_entry
->dwo_unit
= dwo_entry
;
6873 /* Subroutine of lookup_signatured_type.
6874 If we haven't read the TU yet, create the signatured_type data structure
6875 for a TU to be read in directly from a DWO file, bypassing the stub.
6876 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6877 using .gdb_index, then when reading a CU we want to stay in the DWO file
6878 containing that CU. Otherwise we could end up reading several other DWO
6879 files (due to comdat folding) to process the transitive closure of all the
6880 mentioned TUs, and that can be slow. The current DWO file will have every
6881 type signature that it needs.
6882 We only do this for .gdb_index because in the psymtab case we already have
6883 to read all the DWOs to build the type unit groups. */
6885 static struct signatured_type
*
6886 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6888 struct dwarf2_per_objfile
*dwarf2_per_objfile
6889 = cu
->per_cu
->dwarf2_per_objfile
;
6890 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6891 struct dwo_file
*dwo_file
;
6892 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6893 struct signatured_type find_sig_entry
, *sig_entry
;
6896 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6898 /* If TU skeletons have been removed then we may not have read in any
6900 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6902 dwarf2_per_objfile
->signatured_types
6903 = allocate_signatured_type_table (objfile
);
6906 /* We only ever need to read in one copy of a signatured type.
6907 Use the global signatured_types array to do our own comdat-folding
6908 of types. If this is the first time we're reading this TU, and
6909 the TU has an entry in .gdb_index, replace the recorded data from
6910 .gdb_index with this TU. */
6912 find_sig_entry
.signature
= sig
;
6913 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6914 &find_sig_entry
, INSERT
);
6915 sig_entry
= (struct signatured_type
*) *slot
;
6917 /* We can get here with the TU already read, *or* in the process of being
6918 read. Don't reassign the global entry to point to this DWO if that's
6919 the case. Also note that if the TU is already being read, it may not
6920 have come from a DWO, the program may be a mix of Fission-compiled
6921 code and non-Fission-compiled code. */
6923 /* Have we already tried to read this TU?
6924 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6925 needn't exist in the global table yet). */
6926 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6929 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6930 dwo_unit of the TU itself. */
6931 dwo_file
= cu
->dwo_unit
->dwo_file
;
6933 /* Ok, this is the first time we're reading this TU. */
6934 if (dwo_file
->tus
== NULL
)
6936 find_dwo_entry
.signature
= sig
;
6937 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
6938 if (dwo_entry
== NULL
)
6941 /* If the global table doesn't have an entry for this TU, add one. */
6942 if (sig_entry
== NULL
)
6943 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6945 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6946 sig_entry
->per_cu
.tu_read
= 1;
6950 /* Subroutine of lookup_signatured_type.
6951 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6952 then try the DWP file. If the TU stub (skeleton) has been removed then
6953 it won't be in .gdb_index. */
6955 static struct signatured_type
*
6956 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6958 struct dwarf2_per_objfile
*dwarf2_per_objfile
6959 = cu
->per_cu
->dwarf2_per_objfile
;
6960 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6961 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
6962 struct dwo_unit
*dwo_entry
;
6963 struct signatured_type find_sig_entry
, *sig_entry
;
6966 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6967 gdb_assert (dwp_file
!= NULL
);
6969 /* If TU skeletons have been removed then we may not have read in any
6971 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6973 dwarf2_per_objfile
->signatured_types
6974 = allocate_signatured_type_table (objfile
);
6977 find_sig_entry
.signature
= sig
;
6978 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6979 &find_sig_entry
, INSERT
);
6980 sig_entry
= (struct signatured_type
*) *slot
;
6982 /* Have we already tried to read this TU?
6983 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6984 needn't exist in the global table yet). */
6985 if (sig_entry
!= NULL
)
6988 if (dwp_file
->tus
== NULL
)
6990 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
6991 sig
, 1 /* is_debug_types */);
6992 if (dwo_entry
== NULL
)
6995 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6996 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7001 /* Lookup a signature based type for DW_FORM_ref_sig8.
7002 Returns NULL if signature SIG is not present in the table.
7003 It is up to the caller to complain about this. */
7005 static struct signatured_type
*
7006 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7008 struct dwarf2_per_objfile
*dwarf2_per_objfile
7009 = cu
->per_cu
->dwarf2_per_objfile
;
7012 && dwarf2_per_objfile
->using_index
)
7014 /* We're in a DWO/DWP file, and we're using .gdb_index.
7015 These cases require special processing. */
7016 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
7017 return lookup_dwo_signatured_type (cu
, sig
);
7019 return lookup_dwp_signatured_type (cu
, sig
);
7023 struct signatured_type find_entry
, *entry
;
7025 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7027 find_entry
.signature
= sig
;
7028 entry
= ((struct signatured_type
*)
7029 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
7034 /* Low level DIE reading support. */
7036 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
7039 init_cu_die_reader (struct die_reader_specs
*reader
,
7040 struct dwarf2_cu
*cu
,
7041 struct dwarf2_section_info
*section
,
7042 struct dwo_file
*dwo_file
,
7043 struct abbrev_table
*abbrev_table
)
7045 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
7046 reader
->abfd
= get_section_bfd_owner (section
);
7048 reader
->dwo_file
= dwo_file
;
7049 reader
->die_section
= section
;
7050 reader
->buffer
= section
->buffer
;
7051 reader
->buffer_end
= section
->buffer
+ section
->size
;
7052 reader
->comp_dir
= NULL
;
7053 reader
->abbrev_table
= abbrev_table
;
7056 /* Subroutine of init_cutu_and_read_dies to simplify it.
7057 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
7058 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
7061 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
7062 from it to the DIE in the DWO. If NULL we are skipping the stub.
7063 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
7064 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
7065 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
7066 STUB_COMP_DIR may be non-NULL.
7067 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
7068 are filled in with the info of the DIE from the DWO file.
7069 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
7070 from the dwo. Since *RESULT_READER references this abbrev table, it must be
7071 kept around for at least as long as *RESULT_READER.
7073 The result is non-zero if a valid (non-dummy) DIE was found. */
7076 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
7077 struct dwo_unit
*dwo_unit
,
7078 struct die_info
*stub_comp_unit_die
,
7079 const char *stub_comp_dir
,
7080 struct die_reader_specs
*result_reader
,
7081 const gdb_byte
**result_info_ptr
,
7082 struct die_info
**result_comp_unit_die
,
7083 int *result_has_children
,
7084 abbrev_table_up
*result_dwo_abbrev_table
)
7086 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7087 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7088 struct dwarf2_cu
*cu
= this_cu
->cu
;
7090 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7091 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
7092 int i
,num_extra_attrs
;
7093 struct dwarf2_section_info
*dwo_abbrev_section
;
7094 struct attribute
*attr
;
7095 struct die_info
*comp_unit_die
;
7097 /* At most one of these may be provided. */
7098 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
7100 /* These attributes aren't processed until later:
7101 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
7102 DW_AT_comp_dir is used now, to find the DWO file, but it is also
7103 referenced later. However, these attributes are found in the stub
7104 which we won't have later. In order to not impose this complication
7105 on the rest of the code, we read them here and copy them to the
7114 if (stub_comp_unit_die
!= NULL
)
7116 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
7118 if (! this_cu
->is_debug_types
)
7119 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
7120 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
7121 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
7122 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
7123 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
7125 /* There should be a DW_AT_addr_base attribute here (if needed).
7126 We need the value before we can process DW_FORM_GNU_addr_index. */
7128 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
7130 cu
->addr_base
= DW_UNSND (attr
);
7132 /* There should be a DW_AT_ranges_base attribute here (if needed).
7133 We need the value before we can process DW_AT_ranges. */
7134 cu
->ranges_base
= 0;
7135 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
7137 cu
->ranges_base
= DW_UNSND (attr
);
7139 else if (stub_comp_dir
!= NULL
)
7141 /* Reconstruct the comp_dir attribute to simplify the code below. */
7142 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
7143 comp_dir
->name
= DW_AT_comp_dir
;
7144 comp_dir
->form
= DW_FORM_string
;
7145 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
7146 DW_STRING (comp_dir
) = stub_comp_dir
;
7149 /* Set up for reading the DWO CU/TU. */
7150 cu
->dwo_unit
= dwo_unit
;
7151 dwarf2_section_info
*section
= dwo_unit
->section
;
7152 dwarf2_read_section (objfile
, section
);
7153 abfd
= get_section_bfd_owner (section
);
7154 begin_info_ptr
= info_ptr
= (section
->buffer
7155 + to_underlying (dwo_unit
->sect_off
));
7156 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
7158 if (this_cu
->is_debug_types
)
7160 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
7162 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7163 &cu
->header
, section
,
7165 info_ptr
, rcuh_kind::TYPE
);
7166 /* This is not an assert because it can be caused by bad debug info. */
7167 if (sig_type
->signature
!= cu
->header
.signature
)
7169 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
7170 " TU at offset %s [in module %s]"),
7171 hex_string (sig_type
->signature
),
7172 hex_string (cu
->header
.signature
),
7173 sect_offset_str (dwo_unit
->sect_off
),
7174 bfd_get_filename (abfd
));
7176 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7177 /* For DWOs coming from DWP files, we don't know the CU length
7178 nor the type's offset in the TU until now. */
7179 dwo_unit
->length
= get_cu_length (&cu
->header
);
7180 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
7182 /* Establish the type offset that can be used to lookup the type.
7183 For DWO files, we don't know it until now. */
7184 sig_type
->type_offset_in_section
7185 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
7189 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7190 &cu
->header
, section
,
7192 info_ptr
, rcuh_kind::COMPILE
);
7193 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7194 /* For DWOs coming from DWP files, we don't know the CU length
7196 dwo_unit
->length
= get_cu_length (&cu
->header
);
7199 *result_dwo_abbrev_table
7200 = abbrev_table_read_table (dwarf2_per_objfile
, dwo_abbrev_section
,
7201 cu
->header
.abbrev_sect_off
);
7202 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
7203 result_dwo_abbrev_table
->get ());
7205 /* Read in the die, but leave space to copy over the attributes
7206 from the stub. This has the benefit of simplifying the rest of
7207 the code - all the work to maintain the illusion of a single
7208 DW_TAG_{compile,type}_unit DIE is done here. */
7209 num_extra_attrs
= ((stmt_list
!= NULL
)
7213 + (comp_dir
!= NULL
));
7214 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
7215 result_has_children
, num_extra_attrs
);
7217 /* Copy over the attributes from the stub to the DIE we just read in. */
7218 comp_unit_die
= *result_comp_unit_die
;
7219 i
= comp_unit_die
->num_attrs
;
7220 if (stmt_list
!= NULL
)
7221 comp_unit_die
->attrs
[i
++] = *stmt_list
;
7223 comp_unit_die
->attrs
[i
++] = *low_pc
;
7224 if (high_pc
!= NULL
)
7225 comp_unit_die
->attrs
[i
++] = *high_pc
;
7227 comp_unit_die
->attrs
[i
++] = *ranges
;
7228 if (comp_dir
!= NULL
)
7229 comp_unit_die
->attrs
[i
++] = *comp_dir
;
7230 comp_unit_die
->num_attrs
+= num_extra_attrs
;
7232 if (dwarf_die_debug
)
7234 fprintf_unfiltered (gdb_stdlog
,
7235 "Read die from %s@0x%x of %s:\n",
7236 get_section_name (section
),
7237 (unsigned) (begin_info_ptr
- section
->buffer
),
7238 bfd_get_filename (abfd
));
7239 dump_die (comp_unit_die
, dwarf_die_debug
);
7242 /* Save the comp_dir attribute. If there is no DWP file then we'll read
7243 TUs by skipping the stub and going directly to the entry in the DWO file.
7244 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
7245 to get it via circuitous means. Blech. */
7246 if (comp_dir
!= NULL
)
7247 result_reader
->comp_dir
= DW_STRING (comp_dir
);
7249 /* Skip dummy compilation units. */
7250 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
7251 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7254 *result_info_ptr
= info_ptr
;
7258 /* Subroutine of init_cutu_and_read_dies to simplify it.
7259 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
7260 Returns NULL if the specified DWO unit cannot be found. */
7262 static struct dwo_unit
*
7263 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
7264 struct die_info
*comp_unit_die
)
7266 struct dwarf2_cu
*cu
= this_cu
->cu
;
7268 struct dwo_unit
*dwo_unit
;
7269 const char *comp_dir
, *dwo_name
;
7271 gdb_assert (cu
!= NULL
);
7273 /* Yeah, we look dwo_name up again, but it simplifies the code. */
7274 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7275 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7277 if (this_cu
->is_debug_types
)
7279 struct signatured_type
*sig_type
;
7281 /* Since this_cu is the first member of struct signatured_type,
7282 we can go from a pointer to one to a pointer to the other. */
7283 sig_type
= (struct signatured_type
*) this_cu
;
7284 signature
= sig_type
->signature
;
7285 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
7289 struct attribute
*attr
;
7291 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
7293 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
7295 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
7296 signature
= DW_UNSND (attr
);
7297 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
7304 /* Subroutine of init_cutu_and_read_dies to simplify it.
7305 See it for a description of the parameters.
7306 Read a TU directly from a DWO file, bypassing the stub. */
7309 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
7310 int use_existing_cu
, int keep
,
7311 die_reader_func_ftype
*die_reader_func
,
7314 std::unique_ptr
<dwarf2_cu
> new_cu
;
7315 struct signatured_type
*sig_type
;
7316 struct die_reader_specs reader
;
7317 const gdb_byte
*info_ptr
;
7318 struct die_info
*comp_unit_die
;
7320 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7322 /* Verify we can do the following downcast, and that we have the
7324 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
7325 sig_type
= (struct signatured_type
*) this_cu
;
7326 gdb_assert (sig_type
->dwo_unit
!= NULL
);
7328 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7330 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
7331 /* There's no need to do the rereading_dwo_cu handling that
7332 init_cutu_and_read_dies does since we don't read the stub. */
7336 /* If !use_existing_cu, this_cu->cu must be NULL. */
7337 gdb_assert (this_cu
->cu
== NULL
);
7338 new_cu
.reset (new dwarf2_cu (this_cu
));
7341 /* A future optimization, if needed, would be to use an existing
7342 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
7343 could share abbrev tables. */
7345 /* The abbreviation table used by READER, this must live at least as long as
7347 abbrev_table_up dwo_abbrev_table
;
7349 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
7350 NULL
/* stub_comp_unit_die */,
7351 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
7353 &comp_unit_die
, &has_children
,
7354 &dwo_abbrev_table
) == 0)
7360 /* All the "real" work is done here. */
7361 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7363 /* This duplicates the code in init_cutu_and_read_dies,
7364 but the alternative is making the latter more complex.
7365 This function is only for the special case of using DWO files directly:
7366 no point in overly complicating the general case just to handle this. */
7367 if (new_cu
!= NULL
&& keep
)
7369 /* Link this CU into read_in_chain. */
7370 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7371 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7372 /* The chain owns it now. */
7377 /* Initialize a CU (or TU) and read its DIEs.
7378 If the CU defers to a DWO file, read the DWO file as well.
7380 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
7381 Otherwise the table specified in the comp unit header is read in and used.
7382 This is an optimization for when we already have the abbrev table.
7384 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
7385 Otherwise, a new CU is allocated with xmalloc.
7387 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
7388 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
7390 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7391 linker) then DIE_READER_FUNC will not get called. */
7394 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
7395 struct abbrev_table
*abbrev_table
,
7396 int use_existing_cu
, int keep
,
7398 die_reader_func_ftype
*die_reader_func
,
7401 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7402 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7403 struct dwarf2_section_info
*section
= this_cu
->section
;
7404 bfd
*abfd
= get_section_bfd_owner (section
);
7405 struct dwarf2_cu
*cu
;
7406 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7407 struct die_reader_specs reader
;
7408 struct die_info
*comp_unit_die
;
7410 struct attribute
*attr
;
7411 struct signatured_type
*sig_type
= NULL
;
7412 struct dwarf2_section_info
*abbrev_section
;
7413 /* Non-zero if CU currently points to a DWO file and we need to
7414 reread it. When this happens we need to reread the skeleton die
7415 before we can reread the DWO file (this only applies to CUs, not TUs). */
7416 int rereading_dwo_cu
= 0;
7418 if (dwarf_die_debug
)
7419 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7420 this_cu
->is_debug_types
? "type" : "comp",
7421 sect_offset_str (this_cu
->sect_off
));
7423 if (use_existing_cu
)
7426 /* If we're reading a TU directly from a DWO file, including a virtual DWO
7427 file (instead of going through the stub), short-circuit all of this. */
7428 if (this_cu
->reading_dwo_directly
)
7430 /* Narrow down the scope of possibilities to have to understand. */
7431 gdb_assert (this_cu
->is_debug_types
);
7432 gdb_assert (abbrev_table
== NULL
);
7433 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
7434 die_reader_func
, data
);
7438 /* This is cheap if the section is already read in. */
7439 dwarf2_read_section (objfile
, section
);
7441 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7443 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
7445 std::unique_ptr
<dwarf2_cu
> new_cu
;
7446 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7449 /* If this CU is from a DWO file we need to start over, we need to
7450 refetch the attributes from the skeleton CU.
7451 This could be optimized by retrieving those attributes from when we
7452 were here the first time: the previous comp_unit_die was stored in
7453 comp_unit_obstack. But there's no data yet that we need this
7455 if (cu
->dwo_unit
!= NULL
)
7456 rereading_dwo_cu
= 1;
7460 /* If !use_existing_cu, this_cu->cu must be NULL. */
7461 gdb_assert (this_cu
->cu
== NULL
);
7462 new_cu
.reset (new dwarf2_cu (this_cu
));
7466 /* Get the header. */
7467 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7469 /* We already have the header, there's no need to read it in again. */
7470 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7474 if (this_cu
->is_debug_types
)
7476 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7477 &cu
->header
, section
,
7478 abbrev_section
, info_ptr
,
7481 /* Since per_cu is the first member of struct signatured_type,
7482 we can go from a pointer to one to a pointer to the other. */
7483 sig_type
= (struct signatured_type
*) this_cu
;
7484 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7485 gdb_assert (sig_type
->type_offset_in_tu
7486 == cu
->header
.type_cu_offset_in_tu
);
7487 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7489 /* LENGTH has not been set yet for type units if we're
7490 using .gdb_index. */
7491 this_cu
->length
= get_cu_length (&cu
->header
);
7493 /* Establish the type offset that can be used to lookup the type. */
7494 sig_type
->type_offset_in_section
=
7495 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7497 this_cu
->dwarf_version
= cu
->header
.version
;
7501 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7502 &cu
->header
, section
,
7505 rcuh_kind::COMPILE
);
7507 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7508 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
7509 this_cu
->dwarf_version
= cu
->header
.version
;
7513 /* Skip dummy compilation units. */
7514 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7515 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7518 /* If we don't have them yet, read the abbrevs for this compilation unit.
7519 And if we need to read them now, make sure they're freed when we're
7520 done (own the table through ABBREV_TABLE_HOLDER). */
7521 abbrev_table_up abbrev_table_holder
;
7522 if (abbrev_table
!= NULL
)
7523 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7527 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7528 cu
->header
.abbrev_sect_off
);
7529 abbrev_table
= abbrev_table_holder
.get ();
7532 /* Read the top level CU/TU die. */
7533 init_cu_die_reader (&reader
, cu
, section
, NULL
, abbrev_table
);
7534 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7536 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
7539 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7540 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7541 table from the DWO file and pass the ownership over to us. It will be
7542 referenced from READER, so we must make sure to free it after we're done
7545 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7546 DWO CU, that this test will fail (the attribute will not be present). */
7547 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7548 abbrev_table_up dwo_abbrev_table
;
7551 struct dwo_unit
*dwo_unit
;
7552 struct die_info
*dwo_comp_unit_die
;
7556 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
7557 " has children (offset %s) [in module %s]"),
7558 sect_offset_str (this_cu
->sect_off
),
7559 bfd_get_filename (abfd
));
7561 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
7562 if (dwo_unit
!= NULL
)
7564 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
7565 comp_unit_die
, NULL
,
7567 &dwo_comp_unit_die
, &has_children
,
7568 &dwo_abbrev_table
) == 0)
7573 comp_unit_die
= dwo_comp_unit_die
;
7577 /* Yikes, we couldn't find the rest of the DIE, we only have
7578 the stub. A complaint has already been logged. There's
7579 not much more we can do except pass on the stub DIE to
7580 die_reader_func. We don't want to throw an error on bad
7585 /* All of the above is setup for this call. Yikes. */
7586 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7588 /* Done, clean up. */
7589 if (new_cu
!= NULL
&& keep
)
7591 /* Link this CU into read_in_chain. */
7592 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7593 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7594 /* The chain owns it now. */
7599 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
7600 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
7601 to have already done the lookup to find the DWO file).
7603 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7604 THIS_CU->is_debug_types, but nothing else.
7606 We fill in THIS_CU->length.
7608 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7609 linker) then DIE_READER_FUNC will not get called.
7611 THIS_CU->cu is always freed when done.
7612 This is done in order to not leave THIS_CU->cu in a state where we have
7613 to care whether it refers to the "main" CU or the DWO CU. */
7616 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
7617 struct dwo_file
*dwo_file
,
7618 die_reader_func_ftype
*die_reader_func
,
7621 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7622 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7623 struct dwarf2_section_info
*section
= this_cu
->section
;
7624 bfd
*abfd
= get_section_bfd_owner (section
);
7625 struct dwarf2_section_info
*abbrev_section
;
7626 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7627 struct die_reader_specs reader
;
7628 struct die_info
*comp_unit_die
;
7631 if (dwarf_die_debug
)
7632 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7633 this_cu
->is_debug_types
? "type" : "comp",
7634 sect_offset_str (this_cu
->sect_off
));
7636 gdb_assert (this_cu
->cu
== NULL
);
7638 abbrev_section
= (dwo_file
!= NULL
7639 ? &dwo_file
->sections
.abbrev
7640 : get_abbrev_section_for_cu (this_cu
));
7642 /* This is cheap if the section is already read in. */
7643 dwarf2_read_section (objfile
, section
);
7645 struct dwarf2_cu
cu (this_cu
);
7647 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7648 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7649 &cu
.header
, section
,
7650 abbrev_section
, info_ptr
,
7651 (this_cu
->is_debug_types
7653 : rcuh_kind::COMPILE
));
7655 this_cu
->length
= get_cu_length (&cu
.header
);
7657 /* Skip dummy compilation units. */
7658 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7659 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7662 abbrev_table_up abbrev_table
7663 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7664 cu
.header
.abbrev_sect_off
);
7666 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
, abbrev_table
.get ());
7667 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7669 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7672 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
7673 does not lookup the specified DWO file.
7674 This cannot be used to read DWO files.
7676 THIS_CU->cu is always freed when done.
7677 This is done in order to not leave THIS_CU->cu in a state where we have
7678 to care whether it refers to the "main" CU or the DWO CU.
7679 We can revisit this if the data shows there's a performance issue. */
7682 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
7683 die_reader_func_ftype
*die_reader_func
,
7686 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
7689 /* Type Unit Groups.
7691 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7692 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7693 so that all types coming from the same compilation (.o file) are grouped
7694 together. A future step could be to put the types in the same symtab as
7695 the CU the types ultimately came from. */
7698 hash_type_unit_group (const void *item
)
7700 const struct type_unit_group
*tu_group
7701 = (const struct type_unit_group
*) item
;
7703 return hash_stmt_list_entry (&tu_group
->hash
);
7707 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7709 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7710 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7712 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7715 /* Allocate a hash table for type unit groups. */
7718 allocate_type_unit_groups_table (struct objfile
*objfile
)
7720 return htab_create_alloc_ex (3,
7721 hash_type_unit_group
,
7724 &objfile
->objfile_obstack
,
7725 hashtab_obstack_allocate
,
7726 dummy_obstack_deallocate
);
7729 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7730 partial symtabs. We combine several TUs per psymtab to not let the size
7731 of any one psymtab grow too big. */
7732 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7733 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7735 /* Helper routine for get_type_unit_group.
7736 Create the type_unit_group object used to hold one or more TUs. */
7738 static struct type_unit_group
*
7739 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7741 struct dwarf2_per_objfile
*dwarf2_per_objfile
7742 = cu
->per_cu
->dwarf2_per_objfile
;
7743 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7744 struct dwarf2_per_cu_data
*per_cu
;
7745 struct type_unit_group
*tu_group
;
7747 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7748 struct type_unit_group
);
7749 per_cu
= &tu_group
->per_cu
;
7750 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7752 if (dwarf2_per_objfile
->using_index
)
7754 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7755 struct dwarf2_per_cu_quick_data
);
7759 unsigned int line_offset
= to_underlying (line_offset_struct
);
7760 struct partial_symtab
*pst
;
7763 /* Give the symtab a useful name for debug purposes. */
7764 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7765 name
= xstrprintf ("<type_units_%d>",
7766 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7768 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
7770 pst
= create_partial_symtab (per_cu
, name
);
7776 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7777 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7782 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7783 STMT_LIST is a DW_AT_stmt_list attribute. */
7785 static struct type_unit_group
*
7786 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7788 struct dwarf2_per_objfile
*dwarf2_per_objfile
7789 = cu
->per_cu
->dwarf2_per_objfile
;
7790 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7791 struct type_unit_group
*tu_group
;
7793 unsigned int line_offset
;
7794 struct type_unit_group type_unit_group_for_lookup
;
7796 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7798 dwarf2_per_objfile
->type_unit_groups
=
7799 allocate_type_unit_groups_table (dwarf2_per_objfile
->objfile
);
7802 /* Do we need to create a new group, or can we use an existing one? */
7806 line_offset
= DW_UNSND (stmt_list
);
7807 ++tu_stats
->nr_symtab_sharers
;
7811 /* Ugh, no stmt_list. Rare, but we have to handle it.
7812 We can do various things here like create one group per TU or
7813 spread them over multiple groups to split up the expansion work.
7814 To avoid worst case scenarios (too many groups or too large groups)
7815 we, umm, group them in bunches. */
7816 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7817 | (tu_stats
->nr_stmt_less_type_units
7818 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7819 ++tu_stats
->nr_stmt_less_type_units
;
7822 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7823 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7824 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
7825 &type_unit_group_for_lookup
, INSERT
);
7828 tu_group
= (struct type_unit_group
*) *slot
;
7829 gdb_assert (tu_group
!= NULL
);
7833 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7834 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7836 ++tu_stats
->nr_symtabs
;
7842 /* Partial symbol tables. */
7844 /* Create a psymtab named NAME and assign it to PER_CU.
7846 The caller must fill in the following details:
7847 dirname, textlow, texthigh. */
7849 static struct partial_symtab
*
7850 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7852 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7853 struct partial_symtab
*pst
;
7855 pst
= start_psymtab_common (objfile
, name
, 0,
7856 objfile
->global_psymbols
,
7857 objfile
->static_psymbols
);
7859 pst
->psymtabs_addrmap_supported
= 1;
7861 /* This is the glue that links PST into GDB's symbol API. */
7862 pst
->read_symtab_private
= per_cu
;
7863 pst
->read_symtab
= dwarf2_read_symtab
;
7864 per_cu
->v
.psymtab
= pst
;
7869 /* The DATA object passed to process_psymtab_comp_unit_reader has this
7872 struct process_psymtab_comp_unit_data
7874 /* True if we are reading a DW_TAG_partial_unit. */
7876 int want_partial_unit
;
7878 /* The "pretend" language that is used if the CU doesn't declare a
7881 enum language pretend_language
;
7884 /* die_reader_func for process_psymtab_comp_unit. */
7887 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7888 const gdb_byte
*info_ptr
,
7889 struct die_info
*comp_unit_die
,
7893 struct dwarf2_cu
*cu
= reader
->cu
;
7894 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7895 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7896 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7898 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7899 struct partial_symtab
*pst
;
7900 enum pc_bounds_kind cu_bounds_kind
;
7901 const char *filename
;
7902 struct process_psymtab_comp_unit_data
*info
7903 = (struct process_psymtab_comp_unit_data
*) data
;
7905 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
7908 gdb_assert (! per_cu
->is_debug_types
);
7910 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
7912 cu
->list_in_scope
= &file_symbols
;
7914 /* Allocate a new partial symbol table structure. */
7915 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7916 if (filename
== NULL
)
7919 pst
= create_partial_symtab (per_cu
, filename
);
7921 /* This must be done before calling dwarf2_build_include_psymtabs. */
7922 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7924 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7926 dwarf2_find_base_address (comp_unit_die
, cu
);
7928 /* Possibly set the default values of LOWPC and HIGHPC from
7930 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7931 &best_highpc
, cu
, pst
);
7932 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7933 /* Store the contiguous range if it is not empty; it can be empty for
7934 CUs with no code. */
7935 addrmap_set_empty (objfile
->psymtabs_addrmap
,
7936 gdbarch_adjust_dwarf2_addr (gdbarch
,
7937 best_lowpc
+ baseaddr
),
7938 gdbarch_adjust_dwarf2_addr (gdbarch
,
7939 best_highpc
+ baseaddr
) - 1,
7942 /* Check if comp unit has_children.
7943 If so, read the rest of the partial symbols from this comp unit.
7944 If not, there's no more debug_info for this comp unit. */
7947 struct partial_die_info
*first_die
;
7948 CORE_ADDR lowpc
, highpc
;
7950 lowpc
= ((CORE_ADDR
) -1);
7951 highpc
= ((CORE_ADDR
) 0);
7953 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7955 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7956 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7958 /* If we didn't find a lowpc, set it to highpc to avoid
7959 complaints from `maint check'. */
7960 if (lowpc
== ((CORE_ADDR
) -1))
7963 /* If the compilation unit didn't have an explicit address range,
7964 then use the information extracted from its child dies. */
7965 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7968 best_highpc
= highpc
;
7971 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
7972 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
7974 end_psymtab_common (objfile
, pst
);
7976 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
7979 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
7980 struct dwarf2_per_cu_data
*iter
;
7982 /* Fill in 'dependencies' here; we fill in 'users' in a
7984 pst
->number_of_dependencies
= len
;
7986 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
7988 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
7991 pst
->dependencies
[i
] = iter
->v
.psymtab
;
7993 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
7996 /* Get the list of files included in the current compilation unit,
7997 and build a psymtab for each of them. */
7998 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
8000 if (dwarf_read_debug
)
8002 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8004 fprintf_unfiltered (gdb_stdlog
,
8005 "Psymtab for %s unit @%s: %s - %s"
8006 ", %d global, %d static syms\n",
8007 per_cu
->is_debug_types
? "type" : "comp",
8008 sect_offset_str (per_cu
->sect_off
),
8009 paddress (gdbarch
, pst
->textlow
),
8010 paddress (gdbarch
, pst
->texthigh
),
8011 pst
->n_global_syms
, pst
->n_static_syms
);
8015 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8016 Process compilation unit THIS_CU for a psymtab. */
8019 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8020 int want_partial_unit
,
8021 enum language pretend_language
)
8023 /* If this compilation unit was already read in, free the
8024 cached copy in order to read it in again. This is
8025 necessary because we skipped some symbols when we first
8026 read in the compilation unit (see load_partial_dies).
8027 This problem could be avoided, but the benefit is unclear. */
8028 if (this_cu
->cu
!= NULL
)
8029 free_one_cached_comp_unit (this_cu
);
8031 if (this_cu
->is_debug_types
)
8032 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, false,
8033 build_type_psymtabs_reader
, NULL
);
8036 process_psymtab_comp_unit_data info
;
8037 info
.want_partial_unit
= want_partial_unit
;
8038 info
.pretend_language
= pretend_language
;
8039 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, false,
8040 process_psymtab_comp_unit_reader
, &info
);
8043 /* Age out any secondary CUs. */
8044 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
8047 /* Reader function for build_type_psymtabs. */
8050 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
8051 const gdb_byte
*info_ptr
,
8052 struct die_info
*type_unit_die
,
8056 struct dwarf2_per_objfile
*dwarf2_per_objfile
8057 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
8058 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8059 struct dwarf2_cu
*cu
= reader
->cu
;
8060 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8061 struct signatured_type
*sig_type
;
8062 struct type_unit_group
*tu_group
;
8063 struct attribute
*attr
;
8064 struct partial_die_info
*first_die
;
8065 CORE_ADDR lowpc
, highpc
;
8066 struct partial_symtab
*pst
;
8068 gdb_assert (data
== NULL
);
8069 gdb_assert (per_cu
->is_debug_types
);
8070 sig_type
= (struct signatured_type
*) per_cu
;
8075 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
8076 tu_group
= get_type_unit_group (cu
, attr
);
8078 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
8080 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
8081 cu
->list_in_scope
= &file_symbols
;
8082 pst
= create_partial_symtab (per_cu
, "");
8085 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8087 lowpc
= (CORE_ADDR
) -1;
8088 highpc
= (CORE_ADDR
) 0;
8089 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
8091 end_psymtab_common (objfile
, pst
);
8094 /* Struct used to sort TUs by their abbreviation table offset. */
8096 struct tu_abbrev_offset
8098 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
8099 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
8102 signatured_type
*sig_type
;
8103 sect_offset abbrev_offset
;
8106 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
8109 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
8110 const struct tu_abbrev_offset
&b
)
8112 return a
.abbrev_offset
< b
.abbrev_offset
;
8115 /* Efficiently read all the type units.
8116 This does the bulk of the work for build_type_psymtabs.
8118 The efficiency is because we sort TUs by the abbrev table they use and
8119 only read each abbrev table once. In one program there are 200K TUs
8120 sharing 8K abbrev tables.
8122 The main purpose of this function is to support building the
8123 dwarf2_per_objfile->type_unit_groups table.
8124 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
8125 can collapse the search space by grouping them by stmt_list.
8126 The savings can be significant, in the same program from above the 200K TUs
8127 share 8K stmt_list tables.
8129 FUNC is expected to call get_type_unit_group, which will create the
8130 struct type_unit_group if necessary and add it to
8131 dwarf2_per_objfile->type_unit_groups. */
8134 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8136 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8137 abbrev_table_up abbrev_table
;
8138 sect_offset abbrev_offset
;
8140 /* It's up to the caller to not call us multiple times. */
8141 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
8143 if (dwarf2_per_objfile
->all_type_units
.empty ())
8146 /* TUs typically share abbrev tables, and there can be way more TUs than
8147 abbrev tables. Sort by abbrev table to reduce the number of times we
8148 read each abbrev table in.
8149 Alternatives are to punt or to maintain a cache of abbrev tables.
8150 This is simpler and efficient enough for now.
8152 Later we group TUs by their DW_AT_stmt_list value (as this defines the
8153 symtab to use). Typically TUs with the same abbrev offset have the same
8154 stmt_list value too so in practice this should work well.
8156 The basic algorithm here is:
8158 sort TUs by abbrev table
8159 for each TU with same abbrev table:
8160 read abbrev table if first user
8161 read TU top level DIE
8162 [IWBN if DWO skeletons had DW_AT_stmt_list]
8165 if (dwarf_read_debug
)
8166 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
8168 /* Sort in a separate table to maintain the order of all_type_units
8169 for .gdb_index: TU indices directly index all_type_units. */
8170 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
8171 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->all_type_units
.size ());
8173 for (signatured_type
*sig_type
: dwarf2_per_objfile
->all_type_units
)
8174 sorted_by_abbrev
.emplace_back
8175 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
8176 sig_type
->per_cu
.section
,
8177 sig_type
->per_cu
.sect_off
));
8179 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
8180 sort_tu_by_abbrev_offset
);
8182 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
8184 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
8186 /* Switch to the next abbrev table if necessary. */
8187 if (abbrev_table
== NULL
8188 || tu
.abbrev_offset
!= abbrev_offset
)
8190 abbrev_offset
= tu
.abbrev_offset
;
8192 abbrev_table_read_table (dwarf2_per_objfile
,
8193 &dwarf2_per_objfile
->abbrev
,
8195 ++tu_stats
->nr_uniq_abbrev_tables
;
8198 init_cutu_and_read_dies (&tu
.sig_type
->per_cu
, abbrev_table
.get (),
8199 0, 0, false, build_type_psymtabs_reader
, NULL
);
8203 /* Print collected type unit statistics. */
8206 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8208 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8210 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
8211 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
8212 dwarf2_per_objfile
->all_type_units
.size ());
8213 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
8214 tu_stats
->nr_uniq_abbrev_tables
);
8215 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
8216 tu_stats
->nr_symtabs
);
8217 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
8218 tu_stats
->nr_symtab_sharers
);
8219 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
8220 tu_stats
->nr_stmt_less_type_units
);
8221 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
8222 tu_stats
->nr_all_type_units_reallocs
);
8225 /* Traversal function for build_type_psymtabs. */
8228 build_type_psymtab_dependencies (void **slot
, void *info
)
8230 struct dwarf2_per_objfile
*dwarf2_per_objfile
8231 = (struct dwarf2_per_objfile
*) info
;
8232 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8233 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
8234 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
8235 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8236 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
8237 struct signatured_type
*iter
;
8240 gdb_assert (len
> 0);
8241 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
8243 pst
->number_of_dependencies
= len
;
8245 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
8247 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
8250 gdb_assert (iter
->per_cu
.is_debug_types
);
8251 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
8252 iter
->type_unit_group
= tu_group
;
8255 VEC_free (sig_type_ptr
, tu_group
->tus
);
8260 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8261 Build partial symbol tables for the .debug_types comp-units. */
8264 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8266 if (! create_all_type_units (dwarf2_per_objfile
))
8269 build_type_psymtabs_1 (dwarf2_per_objfile
);
8272 /* Traversal function for process_skeletonless_type_unit.
8273 Read a TU in a DWO file and build partial symbols for it. */
8276 process_skeletonless_type_unit (void **slot
, void *info
)
8278 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
8279 struct dwarf2_per_objfile
*dwarf2_per_objfile
8280 = (struct dwarf2_per_objfile
*) info
;
8281 struct signatured_type find_entry
, *entry
;
8283 /* If this TU doesn't exist in the global table, add it and read it in. */
8285 if (dwarf2_per_objfile
->signatured_types
== NULL
)
8287 dwarf2_per_objfile
->signatured_types
8288 = allocate_signatured_type_table (dwarf2_per_objfile
->objfile
);
8291 find_entry
.signature
= dwo_unit
->signature
;
8292 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
8294 /* If we've already seen this type there's nothing to do. What's happening
8295 is we're doing our own version of comdat-folding here. */
8299 /* This does the job that create_all_type_units would have done for
8301 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
8302 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
8305 /* This does the job that build_type_psymtabs_1 would have done. */
8306 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0, false,
8307 build_type_psymtabs_reader
, NULL
);
8312 /* Traversal function for process_skeletonless_type_units. */
8315 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
8317 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
8319 if (dwo_file
->tus
!= NULL
)
8321 htab_traverse_noresize (dwo_file
->tus
,
8322 process_skeletonless_type_unit
, info
);
8328 /* Scan all TUs of DWO files, verifying we've processed them.
8329 This is needed in case a TU was emitted without its skeleton.
8330 Note: This can't be done until we know what all the DWO files are. */
8333 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8335 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
8336 if (get_dwp_file (dwarf2_per_objfile
) == NULL
8337 && dwarf2_per_objfile
->dwo_files
!= NULL
)
8339 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
8340 process_dwo_file_for_skeletonless_type_units
,
8341 dwarf2_per_objfile
);
8345 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
8348 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8350 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8352 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8357 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
8359 /* Set the 'user' field only if it is not already set. */
8360 if (pst
->dependencies
[j
]->user
== NULL
)
8361 pst
->dependencies
[j
]->user
= pst
;
8366 /* Build the partial symbol table by doing a quick pass through the
8367 .debug_info and .debug_abbrev sections. */
8370 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8372 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8374 if (dwarf_read_debug
)
8376 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
8377 objfile_name (objfile
));
8380 dwarf2_per_objfile
->reading_partial_symbols
= 1;
8382 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
8384 /* Any cached compilation units will be linked by the per-objfile
8385 read_in_chain. Make sure to free them when we're done. */
8386 free_cached_comp_units
freer (dwarf2_per_objfile
);
8388 build_type_psymtabs (dwarf2_per_objfile
);
8390 create_all_comp_units (dwarf2_per_objfile
);
8392 /* Create a temporary address map on a temporary obstack. We later
8393 copy this to the final obstack. */
8394 auto_obstack temp_obstack
;
8396 scoped_restore save_psymtabs_addrmap
8397 = make_scoped_restore (&objfile
->psymtabs_addrmap
,
8398 addrmap_create_mutable (&temp_obstack
));
8400 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8401 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
8403 /* This has to wait until we read the CUs, we need the list of DWOs. */
8404 process_skeletonless_type_units (dwarf2_per_objfile
);
8406 /* Now that all TUs have been processed we can fill in the dependencies. */
8407 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
8409 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
8410 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
8413 if (dwarf_read_debug
)
8414 print_tu_stats (dwarf2_per_objfile
);
8416 set_partial_user (dwarf2_per_objfile
);
8418 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
8419 &objfile
->objfile_obstack
);
8420 /* At this point we want to keep the address map. */
8421 save_psymtabs_addrmap
.release ();
8423 if (dwarf_read_debug
)
8424 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
8425 objfile_name (objfile
));
8428 /* die_reader_func for load_partial_comp_unit. */
8431 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
8432 const gdb_byte
*info_ptr
,
8433 struct die_info
*comp_unit_die
,
8437 struct dwarf2_cu
*cu
= reader
->cu
;
8439 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
8441 /* Check if comp unit has_children.
8442 If so, read the rest of the partial symbols from this comp unit.
8443 If not, there's no more debug_info for this comp unit. */
8445 load_partial_dies (reader
, info_ptr
, 0);
8448 /* Load the partial DIEs for a secondary CU into memory.
8449 This is also used when rereading a primary CU with load_all_dies. */
8452 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
8454 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1, false,
8455 load_partial_comp_unit_reader
, NULL
);
8459 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
8460 struct dwarf2_section_info
*section
,
8461 struct dwarf2_section_info
*abbrev_section
,
8462 unsigned int is_dwz
)
8464 const gdb_byte
*info_ptr
;
8465 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8467 if (dwarf_read_debug
)
8468 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
8469 get_section_name (section
),
8470 get_section_file_name (section
));
8472 dwarf2_read_section (objfile
, section
);
8474 info_ptr
= section
->buffer
;
8476 while (info_ptr
< section
->buffer
+ section
->size
)
8478 struct dwarf2_per_cu_data
*this_cu
;
8480 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
8482 comp_unit_head cu_header
;
8483 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
8484 abbrev_section
, info_ptr
,
8485 rcuh_kind::COMPILE
);
8487 /* Save the compilation unit for later lookup. */
8488 if (cu_header
.unit_type
!= DW_UT_type
)
8490 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
8491 struct dwarf2_per_cu_data
);
8492 memset (this_cu
, 0, sizeof (*this_cu
));
8496 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
8497 struct signatured_type
);
8498 memset (sig_type
, 0, sizeof (*sig_type
));
8499 sig_type
->signature
= cu_header
.signature
;
8500 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
8501 this_cu
= &sig_type
->per_cu
;
8503 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
8504 this_cu
->sect_off
= sect_off
;
8505 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
8506 this_cu
->is_dwz
= is_dwz
;
8507 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
8508 this_cu
->section
= section
;
8510 dwarf2_per_objfile
->all_comp_units
.push_back (this_cu
);
8512 info_ptr
= info_ptr
+ this_cu
->length
;
8516 /* Create a list of all compilation units in OBJFILE.
8517 This is only done for -readnow and building partial symtabs. */
8520 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8522 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
8523 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
8524 &dwarf2_per_objfile
->abbrev
, 0);
8526 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
8528 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
8532 /* Process all loaded DIEs for compilation unit CU, starting at
8533 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8534 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8535 DW_AT_ranges). See the comments of add_partial_subprogram on how
8536 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8539 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8540 CORE_ADDR
*highpc
, int set_addrmap
,
8541 struct dwarf2_cu
*cu
)
8543 struct partial_die_info
*pdi
;
8545 /* Now, march along the PDI's, descending into ones which have
8546 interesting children but skipping the children of the other ones,
8547 until we reach the end of the compilation unit. */
8555 /* Anonymous namespaces or modules have no name but have interesting
8556 children, so we need to look at them. Ditto for anonymous
8559 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8560 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8561 || pdi
->tag
== DW_TAG_imported_unit
8562 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8566 case DW_TAG_subprogram
:
8567 case DW_TAG_inlined_subroutine
:
8568 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8570 case DW_TAG_constant
:
8571 case DW_TAG_variable
:
8572 case DW_TAG_typedef
:
8573 case DW_TAG_union_type
:
8574 if (!pdi
->is_declaration
)
8576 add_partial_symbol (pdi
, cu
);
8579 case DW_TAG_class_type
:
8580 case DW_TAG_interface_type
:
8581 case DW_TAG_structure_type
:
8582 if (!pdi
->is_declaration
)
8584 add_partial_symbol (pdi
, cu
);
8586 if ((cu
->language
== language_rust
8587 || cu
->language
== language_cplus
) && pdi
->has_children
)
8588 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8591 case DW_TAG_enumeration_type
:
8592 if (!pdi
->is_declaration
)
8593 add_partial_enumeration (pdi
, cu
);
8595 case DW_TAG_base_type
:
8596 case DW_TAG_subrange_type
:
8597 /* File scope base type definitions are added to the partial
8599 add_partial_symbol (pdi
, cu
);
8601 case DW_TAG_namespace
:
8602 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8605 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8607 case DW_TAG_imported_unit
:
8609 struct dwarf2_per_cu_data
*per_cu
;
8611 /* For now we don't handle imported units in type units. */
8612 if (cu
->per_cu
->is_debug_types
)
8614 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8615 " supported in type units [in module %s]"),
8616 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8619 per_cu
= dwarf2_find_containing_comp_unit
8620 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8621 cu
->per_cu
->dwarf2_per_objfile
);
8623 /* Go read the partial unit, if needed. */
8624 if (per_cu
->v
.psymtab
== NULL
)
8625 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
8627 VEC_safe_push (dwarf2_per_cu_ptr
,
8628 cu
->per_cu
->imported_symtabs
, per_cu
);
8631 case DW_TAG_imported_declaration
:
8632 add_partial_symbol (pdi
, cu
);
8639 /* If the die has a sibling, skip to the sibling. */
8641 pdi
= pdi
->die_sibling
;
8645 /* Functions used to compute the fully scoped name of a partial DIE.
8647 Normally, this is simple. For C++, the parent DIE's fully scoped
8648 name is concatenated with "::" and the partial DIE's name.
8649 Enumerators are an exception; they use the scope of their parent
8650 enumeration type, i.e. the name of the enumeration type is not
8651 prepended to the enumerator.
8653 There are two complexities. One is DW_AT_specification; in this
8654 case "parent" means the parent of the target of the specification,
8655 instead of the direct parent of the DIE. The other is compilers
8656 which do not emit DW_TAG_namespace; in this case we try to guess
8657 the fully qualified name of structure types from their members'
8658 linkage names. This must be done using the DIE's children rather
8659 than the children of any DW_AT_specification target. We only need
8660 to do this for structures at the top level, i.e. if the target of
8661 any DW_AT_specification (if any; otherwise the DIE itself) does not
8664 /* Compute the scope prefix associated with PDI's parent, in
8665 compilation unit CU. The result will be allocated on CU's
8666 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8667 field. NULL is returned if no prefix is necessary. */
8669 partial_die_parent_scope (struct partial_die_info
*pdi
,
8670 struct dwarf2_cu
*cu
)
8672 const char *grandparent_scope
;
8673 struct partial_die_info
*parent
, *real_pdi
;
8675 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8676 then this means the parent of the specification DIE. */
8679 while (real_pdi
->has_specification
)
8680 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
8681 real_pdi
->spec_is_dwz
, cu
);
8683 parent
= real_pdi
->die_parent
;
8687 if (parent
->scope_set
)
8688 return parent
->scope
;
8692 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8694 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8695 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8696 Work around this problem here. */
8697 if (cu
->language
== language_cplus
8698 && parent
->tag
== DW_TAG_namespace
8699 && strcmp (parent
->name
, "::") == 0
8700 && grandparent_scope
== NULL
)
8702 parent
->scope
= NULL
;
8703 parent
->scope_set
= 1;
8707 if (pdi
->tag
== DW_TAG_enumerator
)
8708 /* Enumerators should not get the name of the enumeration as a prefix. */
8709 parent
->scope
= grandparent_scope
;
8710 else if (parent
->tag
== DW_TAG_namespace
8711 || parent
->tag
== DW_TAG_module
8712 || parent
->tag
== DW_TAG_structure_type
8713 || parent
->tag
== DW_TAG_class_type
8714 || parent
->tag
== DW_TAG_interface_type
8715 || parent
->tag
== DW_TAG_union_type
8716 || parent
->tag
== DW_TAG_enumeration_type
)
8718 if (grandparent_scope
== NULL
)
8719 parent
->scope
= parent
->name
;
8721 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8723 parent
->name
, 0, cu
);
8727 /* FIXME drow/2004-04-01: What should we be doing with
8728 function-local names? For partial symbols, we should probably be
8730 complaint (_("unhandled containing DIE tag %d for DIE at %s"),
8731 parent
->tag
, sect_offset_str (pdi
->sect_off
));
8732 parent
->scope
= grandparent_scope
;
8735 parent
->scope_set
= 1;
8736 return parent
->scope
;
8739 /* Return the fully scoped name associated with PDI, from compilation unit
8740 CU. The result will be allocated with malloc. */
8743 partial_die_full_name (struct partial_die_info
*pdi
,
8744 struct dwarf2_cu
*cu
)
8746 const char *parent_scope
;
8748 /* If this is a template instantiation, we can not work out the
8749 template arguments from partial DIEs. So, unfortunately, we have
8750 to go through the full DIEs. At least any work we do building
8751 types here will be reused if full symbols are loaded later. */
8752 if (pdi
->has_template_arguments
)
8756 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8758 struct die_info
*die
;
8759 struct attribute attr
;
8760 struct dwarf2_cu
*ref_cu
= cu
;
8762 /* DW_FORM_ref_addr is using section offset. */
8763 attr
.name
= (enum dwarf_attribute
) 0;
8764 attr
.form
= DW_FORM_ref_addr
;
8765 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8766 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8768 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8772 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8773 if (parent_scope
== NULL
)
8776 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
8780 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8782 struct dwarf2_per_objfile
*dwarf2_per_objfile
8783 = cu
->per_cu
->dwarf2_per_objfile
;
8784 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8785 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8787 const char *actual_name
= NULL
;
8789 char *built_actual_name
;
8791 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8793 built_actual_name
= partial_die_full_name (pdi
, cu
);
8794 if (built_actual_name
!= NULL
)
8795 actual_name
= built_actual_name
;
8797 if (actual_name
== NULL
)
8798 actual_name
= pdi
->name
;
8802 case DW_TAG_inlined_subroutine
:
8803 case DW_TAG_subprogram
:
8804 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
8805 if (pdi
->is_external
|| cu
->language
== language_ada
)
8807 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
8808 of the global scope. But in Ada, we want to be able to access
8809 nested procedures globally. So all Ada subprograms are stored
8810 in the global scope. */
8811 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8812 built_actual_name
!= NULL
,
8813 VAR_DOMAIN
, LOC_BLOCK
,
8814 &objfile
->global_psymbols
,
8815 addr
, cu
->language
, objfile
);
8819 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8820 built_actual_name
!= NULL
,
8821 VAR_DOMAIN
, LOC_BLOCK
,
8822 &objfile
->static_psymbols
,
8823 addr
, cu
->language
, objfile
);
8826 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8827 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8829 case DW_TAG_constant
:
8831 std::vector
<partial_symbol
*> *list
;
8833 if (pdi
->is_external
)
8834 list
= &objfile
->global_psymbols
;
8836 list
= &objfile
->static_psymbols
;
8837 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8838 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
8839 list
, 0, cu
->language
, objfile
);
8842 case DW_TAG_variable
:
8844 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8848 && !dwarf2_per_objfile
->has_section_at_zero
)
8850 /* A global or static variable may also have been stripped
8851 out by the linker if unused, in which case its address
8852 will be nullified; do not add such variables into partial
8853 symbol table then. */
8855 else if (pdi
->is_external
)
8858 Don't enter into the minimal symbol tables as there is
8859 a minimal symbol table entry from the ELF symbols already.
8860 Enter into partial symbol table if it has a location
8861 descriptor or a type.
8862 If the location descriptor is missing, new_symbol will create
8863 a LOC_UNRESOLVED symbol, the address of the variable will then
8864 be determined from the minimal symbol table whenever the variable
8866 The address for the partial symbol table entry is not
8867 used by GDB, but it comes in handy for debugging partial symbol
8870 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8871 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8872 built_actual_name
!= NULL
,
8873 VAR_DOMAIN
, LOC_STATIC
,
8874 &objfile
->global_psymbols
,
8876 cu
->language
, objfile
);
8880 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8882 /* Static Variable. Skip symbols whose value we cannot know (those
8883 without location descriptors or constant values). */
8884 if (!has_loc
&& !pdi
->has_const_value
)
8886 xfree (built_actual_name
);
8890 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8891 built_actual_name
!= NULL
,
8892 VAR_DOMAIN
, LOC_STATIC
,
8893 &objfile
->static_psymbols
,
8894 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
8895 cu
->language
, objfile
);
8898 case DW_TAG_typedef
:
8899 case DW_TAG_base_type
:
8900 case DW_TAG_subrange_type
:
8901 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8902 built_actual_name
!= NULL
,
8903 VAR_DOMAIN
, LOC_TYPEDEF
,
8904 &objfile
->static_psymbols
,
8905 0, cu
->language
, objfile
);
8907 case DW_TAG_imported_declaration
:
8908 case DW_TAG_namespace
:
8909 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8910 built_actual_name
!= NULL
,
8911 VAR_DOMAIN
, LOC_TYPEDEF
,
8912 &objfile
->global_psymbols
,
8913 0, cu
->language
, objfile
);
8916 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8917 built_actual_name
!= NULL
,
8918 MODULE_DOMAIN
, LOC_TYPEDEF
,
8919 &objfile
->global_psymbols
,
8920 0, cu
->language
, objfile
);
8922 case DW_TAG_class_type
:
8923 case DW_TAG_interface_type
:
8924 case DW_TAG_structure_type
:
8925 case DW_TAG_union_type
:
8926 case DW_TAG_enumeration_type
:
8927 /* Skip external references. The DWARF standard says in the section
8928 about "Structure, Union, and Class Type Entries": "An incomplete
8929 structure, union or class type is represented by a structure,
8930 union or class entry that does not have a byte size attribute
8931 and that has a DW_AT_declaration attribute." */
8932 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8934 xfree (built_actual_name
);
8938 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8939 static vs. global. */
8940 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8941 built_actual_name
!= NULL
,
8942 STRUCT_DOMAIN
, LOC_TYPEDEF
,
8943 cu
->language
== language_cplus
8944 ? &objfile
->global_psymbols
8945 : &objfile
->static_psymbols
,
8946 0, cu
->language
, objfile
);
8949 case DW_TAG_enumerator
:
8950 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8951 built_actual_name
!= NULL
,
8952 VAR_DOMAIN
, LOC_CONST
,
8953 cu
->language
== language_cplus
8954 ? &objfile
->global_psymbols
8955 : &objfile
->static_psymbols
,
8956 0, cu
->language
, objfile
);
8962 xfree (built_actual_name
);
8965 /* Read a partial die corresponding to a namespace; also, add a symbol
8966 corresponding to that namespace to the symbol table. NAMESPACE is
8967 the name of the enclosing namespace. */
8970 add_partial_namespace (struct partial_die_info
*pdi
,
8971 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8972 int set_addrmap
, struct dwarf2_cu
*cu
)
8974 /* Add a symbol for the namespace. */
8976 add_partial_symbol (pdi
, cu
);
8978 /* Now scan partial symbols in that namespace. */
8980 if (pdi
->has_children
)
8981 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8984 /* Read a partial die corresponding to a Fortran module. */
8987 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
8988 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
8990 /* Add a symbol for the namespace. */
8992 add_partial_symbol (pdi
, cu
);
8994 /* Now scan partial symbols in that module. */
8996 if (pdi
->has_children
)
8997 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9000 /* Read a partial die corresponding to a subprogram or an inlined
9001 subprogram and create a partial symbol for that subprogram.
9002 When the CU language allows it, this routine also defines a partial
9003 symbol for each nested subprogram that this subprogram contains.
9004 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
9005 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
9007 PDI may also be a lexical block, in which case we simply search
9008 recursively for subprograms defined inside that lexical block.
9009 Again, this is only performed when the CU language allows this
9010 type of definitions. */
9013 add_partial_subprogram (struct partial_die_info
*pdi
,
9014 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9015 int set_addrmap
, struct dwarf2_cu
*cu
)
9017 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
9019 if (pdi
->has_pc_info
)
9021 if (pdi
->lowpc
< *lowpc
)
9022 *lowpc
= pdi
->lowpc
;
9023 if (pdi
->highpc
> *highpc
)
9024 *highpc
= pdi
->highpc
;
9027 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9028 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9033 baseaddr
= ANOFFSET (objfile
->section_offsets
,
9034 SECT_OFF_TEXT (objfile
));
9035 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
9036 pdi
->lowpc
+ baseaddr
);
9037 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
9038 pdi
->highpc
+ baseaddr
);
9039 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
9040 cu
->per_cu
->v
.psymtab
);
9044 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
9046 if (!pdi
->is_declaration
)
9047 /* Ignore subprogram DIEs that do not have a name, they are
9048 illegal. Do not emit a complaint at this point, we will
9049 do so when we convert this psymtab into a symtab. */
9051 add_partial_symbol (pdi
, cu
);
9055 if (! pdi
->has_children
)
9058 if (cu
->language
== language_ada
)
9060 pdi
= pdi
->die_child
;
9064 if (pdi
->tag
== DW_TAG_subprogram
9065 || pdi
->tag
== DW_TAG_inlined_subroutine
9066 || pdi
->tag
== DW_TAG_lexical_block
)
9067 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
9068 pdi
= pdi
->die_sibling
;
9073 /* Read a partial die corresponding to an enumeration type. */
9076 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
9077 struct dwarf2_cu
*cu
)
9079 struct partial_die_info
*pdi
;
9081 if (enum_pdi
->name
!= NULL
)
9082 add_partial_symbol (enum_pdi
, cu
);
9084 pdi
= enum_pdi
->die_child
;
9087 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
9088 complaint (_("malformed enumerator DIE ignored"));
9090 add_partial_symbol (pdi
, cu
);
9091 pdi
= pdi
->die_sibling
;
9095 /* Return the initial uleb128 in the die at INFO_PTR. */
9098 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
9100 unsigned int bytes_read
;
9102 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9105 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
9106 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
9108 Return the corresponding abbrev, or NULL if the number is zero (indicating
9109 an empty DIE). In either case *BYTES_READ will be set to the length of
9110 the initial number. */
9112 static struct abbrev_info
*
9113 peek_die_abbrev (const die_reader_specs
&reader
,
9114 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
9116 dwarf2_cu
*cu
= reader
.cu
;
9117 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
9118 unsigned int abbrev_number
9119 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
9121 if (abbrev_number
== 0)
9124 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
9127 error (_("Dwarf Error: Could not find abbrev number %d in %s"
9128 " at offset %s [in module %s]"),
9129 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
9130 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
9136 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9137 Returns a pointer to the end of a series of DIEs, terminated by an empty
9138 DIE. Any children of the skipped DIEs will also be skipped. */
9140 static const gdb_byte
*
9141 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
9145 unsigned int bytes_read
;
9146 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
9149 return info_ptr
+ bytes_read
;
9151 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
9155 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9156 INFO_PTR should point just after the initial uleb128 of a DIE, and the
9157 abbrev corresponding to that skipped uleb128 should be passed in
9158 ABBREV. Returns a pointer to this DIE's sibling, skipping any
9161 static const gdb_byte
*
9162 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
9163 struct abbrev_info
*abbrev
)
9165 unsigned int bytes_read
;
9166 struct attribute attr
;
9167 bfd
*abfd
= reader
->abfd
;
9168 struct dwarf2_cu
*cu
= reader
->cu
;
9169 const gdb_byte
*buffer
= reader
->buffer
;
9170 const gdb_byte
*buffer_end
= reader
->buffer_end
;
9171 unsigned int form
, i
;
9173 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
9175 /* The only abbrev we care about is DW_AT_sibling. */
9176 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
9178 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
9179 if (attr
.form
== DW_FORM_ref_addr
)
9180 complaint (_("ignoring absolute DW_AT_sibling"));
9183 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
9184 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
9186 if (sibling_ptr
< info_ptr
)
9187 complaint (_("DW_AT_sibling points backwards"));
9188 else if (sibling_ptr
> reader
->buffer_end
)
9189 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
9195 /* If it isn't DW_AT_sibling, skip this attribute. */
9196 form
= abbrev
->attrs
[i
].form
;
9200 case DW_FORM_ref_addr
:
9201 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
9202 and later it is offset sized. */
9203 if (cu
->header
.version
== 2)
9204 info_ptr
+= cu
->header
.addr_size
;
9206 info_ptr
+= cu
->header
.offset_size
;
9208 case DW_FORM_GNU_ref_alt
:
9209 info_ptr
+= cu
->header
.offset_size
;
9212 info_ptr
+= cu
->header
.addr_size
;
9219 case DW_FORM_flag_present
:
9220 case DW_FORM_implicit_const
:
9232 case DW_FORM_ref_sig8
:
9235 case DW_FORM_data16
:
9238 case DW_FORM_string
:
9239 read_direct_string (abfd
, info_ptr
, &bytes_read
);
9240 info_ptr
+= bytes_read
;
9242 case DW_FORM_sec_offset
:
9244 case DW_FORM_GNU_strp_alt
:
9245 info_ptr
+= cu
->header
.offset_size
;
9247 case DW_FORM_exprloc
:
9249 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9250 info_ptr
+= bytes_read
;
9252 case DW_FORM_block1
:
9253 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
9255 case DW_FORM_block2
:
9256 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
9258 case DW_FORM_block4
:
9259 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
9263 case DW_FORM_ref_udata
:
9264 case DW_FORM_GNU_addr_index
:
9265 case DW_FORM_GNU_str_index
:
9266 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
9268 case DW_FORM_indirect
:
9269 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9270 info_ptr
+= bytes_read
;
9271 /* We need to continue parsing from here, so just go back to
9273 goto skip_attribute
;
9276 error (_("Dwarf Error: Cannot handle %s "
9277 "in DWARF reader [in module %s]"),
9278 dwarf_form_name (form
),
9279 bfd_get_filename (abfd
));
9283 if (abbrev
->has_children
)
9284 return skip_children (reader
, info_ptr
);
9289 /* Locate ORIG_PDI's sibling.
9290 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
9292 static const gdb_byte
*
9293 locate_pdi_sibling (const struct die_reader_specs
*reader
,
9294 struct partial_die_info
*orig_pdi
,
9295 const gdb_byte
*info_ptr
)
9297 /* Do we know the sibling already? */
9299 if (orig_pdi
->sibling
)
9300 return orig_pdi
->sibling
;
9302 /* Are there any children to deal with? */
9304 if (!orig_pdi
->has_children
)
9307 /* Skip the children the long way. */
9309 return skip_children (reader
, info_ptr
);
9312 /* Expand this partial symbol table into a full symbol table. SELF is
9316 dwarf2_read_symtab (struct partial_symtab
*self
,
9317 struct objfile
*objfile
)
9319 struct dwarf2_per_objfile
*dwarf2_per_objfile
9320 = get_dwarf2_per_objfile (objfile
);
9324 warning (_("bug: psymtab for %s is already read in."),
9331 printf_filtered (_("Reading in symbols for %s..."),
9333 gdb_flush (gdb_stdout
);
9336 /* If this psymtab is constructed from a debug-only objfile, the
9337 has_section_at_zero flag will not necessarily be correct. We
9338 can get the correct value for this flag by looking at the data
9339 associated with the (presumably stripped) associated objfile. */
9340 if (objfile
->separate_debug_objfile_backlink
)
9342 struct dwarf2_per_objfile
*dpo_backlink
9343 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
9345 dwarf2_per_objfile
->has_section_at_zero
9346 = dpo_backlink
->has_section_at_zero
;
9349 dwarf2_per_objfile
->reading_partial_symbols
= 0;
9351 psymtab_to_symtab_1 (self
);
9353 /* Finish up the debug error message. */
9355 printf_filtered (_("done.\n"));
9358 process_cu_includes (dwarf2_per_objfile
);
9361 /* Reading in full CUs. */
9363 /* Add PER_CU to the queue. */
9366 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9367 enum language pretend_language
)
9369 struct dwarf2_queue_item
*item
;
9372 item
= XNEW (struct dwarf2_queue_item
);
9373 item
->per_cu
= per_cu
;
9374 item
->pretend_language
= pretend_language
;
9377 if (dwarf2_queue
== NULL
)
9378 dwarf2_queue
= item
;
9380 dwarf2_queue_tail
->next
= item
;
9382 dwarf2_queue_tail
= item
;
9385 /* If PER_CU is not yet queued, add it to the queue.
9386 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
9388 The result is non-zero if PER_CU was queued, otherwise the result is zero
9389 meaning either PER_CU is already queued or it is already loaded.
9391 N.B. There is an invariant here that if a CU is queued then it is loaded.
9392 The caller is required to load PER_CU if we return non-zero. */
9395 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
9396 struct dwarf2_per_cu_data
*per_cu
,
9397 enum language pretend_language
)
9399 /* We may arrive here during partial symbol reading, if we need full
9400 DIEs to process an unusual case (e.g. template arguments). Do
9401 not queue PER_CU, just tell our caller to load its DIEs. */
9402 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
9404 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
9409 /* Mark the dependence relation so that we don't flush PER_CU
9411 if (dependent_cu
!= NULL
)
9412 dwarf2_add_dependence (dependent_cu
, per_cu
);
9414 /* If it's already on the queue, we have nothing to do. */
9418 /* If the compilation unit is already loaded, just mark it as
9420 if (per_cu
->cu
!= NULL
)
9422 per_cu
->cu
->last_used
= 0;
9426 /* Add it to the queue. */
9427 queue_comp_unit (per_cu
, pretend_language
);
9432 /* Process the queue. */
9435 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9437 struct dwarf2_queue_item
*item
, *next_item
;
9439 if (dwarf_read_debug
)
9441 fprintf_unfiltered (gdb_stdlog
,
9442 "Expanding one or more symtabs of objfile %s ...\n",
9443 objfile_name (dwarf2_per_objfile
->objfile
));
9446 /* The queue starts out with one item, but following a DIE reference
9447 may load a new CU, adding it to the end of the queue. */
9448 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
9450 if ((dwarf2_per_objfile
->using_index
9451 ? !item
->per_cu
->v
.quick
->compunit_symtab
9452 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
9453 /* Skip dummy CUs. */
9454 && item
->per_cu
->cu
!= NULL
)
9456 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
9457 unsigned int debug_print_threshold
;
9460 if (per_cu
->is_debug_types
)
9462 struct signatured_type
*sig_type
=
9463 (struct signatured_type
*) per_cu
;
9465 sprintf (buf
, "TU %s at offset %s",
9466 hex_string (sig_type
->signature
),
9467 sect_offset_str (per_cu
->sect_off
));
9468 /* There can be 100s of TUs.
9469 Only print them in verbose mode. */
9470 debug_print_threshold
= 2;
9474 sprintf (buf
, "CU at offset %s",
9475 sect_offset_str (per_cu
->sect_off
));
9476 debug_print_threshold
= 1;
9479 if (dwarf_read_debug
>= debug_print_threshold
)
9480 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
9482 if (per_cu
->is_debug_types
)
9483 process_full_type_unit (per_cu
, item
->pretend_language
);
9485 process_full_comp_unit (per_cu
, item
->pretend_language
);
9487 if (dwarf_read_debug
>= debug_print_threshold
)
9488 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
9491 item
->per_cu
->queued
= 0;
9492 next_item
= item
->next
;
9496 dwarf2_queue_tail
= NULL
;
9498 if (dwarf_read_debug
)
9500 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
9501 objfile_name (dwarf2_per_objfile
->objfile
));
9505 /* Read in full symbols for PST, and anything it depends on. */
9508 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
9510 struct dwarf2_per_cu_data
*per_cu
;
9516 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
9517 if (!pst
->dependencies
[i
]->readin
9518 && pst
->dependencies
[i
]->user
== NULL
)
9520 /* Inform about additional files that need to be read in. */
9523 /* FIXME: i18n: Need to make this a single string. */
9524 fputs_filtered (" ", gdb_stdout
);
9526 fputs_filtered ("and ", gdb_stdout
);
9528 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
9529 wrap_here (""); /* Flush output. */
9530 gdb_flush (gdb_stdout
);
9532 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
9535 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
9539 /* It's an include file, no symbols to read for it.
9540 Everything is in the parent symtab. */
9545 dw2_do_instantiate_symtab (per_cu
, false);
9548 /* Trivial hash function for die_info: the hash value of a DIE
9549 is its offset in .debug_info for this objfile. */
9552 die_hash (const void *item
)
9554 const struct die_info
*die
= (const struct die_info
*) item
;
9556 return to_underlying (die
->sect_off
);
9559 /* Trivial comparison function for die_info structures: two DIEs
9560 are equal if they have the same offset. */
9563 die_eq (const void *item_lhs
, const void *item_rhs
)
9565 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9566 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9568 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9571 /* die_reader_func for load_full_comp_unit.
9572 This is identical to read_signatured_type_reader,
9573 but is kept separate for now. */
9576 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
9577 const gdb_byte
*info_ptr
,
9578 struct die_info
*comp_unit_die
,
9582 struct dwarf2_cu
*cu
= reader
->cu
;
9583 enum language
*language_ptr
= (enum language
*) data
;
9585 gdb_assert (cu
->die_hash
== NULL
);
9587 htab_create_alloc_ex (cu
->header
.length
/ 12,
9591 &cu
->comp_unit_obstack
,
9592 hashtab_obstack_allocate
,
9593 dummy_obstack_deallocate
);
9596 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
9597 &info_ptr
, comp_unit_die
);
9598 cu
->dies
= comp_unit_die
;
9599 /* comp_unit_die is not stored in die_hash, no need. */
9601 /* We try not to read any attributes in this function, because not
9602 all CUs needed for references have been loaded yet, and symbol
9603 table processing isn't initialized. But we have to set the CU language,
9604 or we won't be able to build types correctly.
9605 Similarly, if we do not read the producer, we can not apply
9606 producer-specific interpretation. */
9607 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
9610 /* Load the DIEs associated with PER_CU into memory. */
9613 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9615 enum language pretend_language
)
9617 gdb_assert (! this_cu
->is_debug_types
);
9619 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1, skip_partial
,
9620 load_full_comp_unit_reader
, &pretend_language
);
9623 /* Add a DIE to the delayed physname list. */
9626 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9627 const char *name
, struct die_info
*die
,
9628 struct dwarf2_cu
*cu
)
9630 struct delayed_method_info mi
;
9632 mi
.fnfield_index
= fnfield_index
;
9636 cu
->method_list
.push_back (mi
);
9639 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9640 "const" / "volatile". If so, decrements LEN by the length of the
9641 modifier and return true. Otherwise return false. */
9645 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9647 size_t mod_len
= sizeof (mod
) - 1;
9648 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9656 /* Compute the physnames of any methods on the CU's method list.
9658 The computation of method physnames is delayed in order to avoid the
9659 (bad) condition that one of the method's formal parameters is of an as yet
9663 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9665 /* Only C++ delays computing physnames. */
9666 if (cu
->method_list
.empty ())
9668 gdb_assert (cu
->language
== language_cplus
);
9670 for (struct delayed_method_info
&mi
: cu
->method_list
)
9672 const char *physname
;
9673 struct fn_fieldlist
*fn_flp
9674 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9675 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9676 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9677 = physname
? physname
: "";
9679 /* Since there's no tag to indicate whether a method is a
9680 const/volatile overload, extract that information out of the
9682 if (physname
!= NULL
)
9684 size_t len
= strlen (physname
);
9688 if (physname
[len
] == ')') /* shortcut */
9690 else if (check_modifier (physname
, len
, " const"))
9691 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9692 else if (check_modifier (physname
, len
, " volatile"))
9693 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9700 /* The list is no longer needed. */
9701 cu
->method_list
.clear ();
9704 /* Go objects should be embedded in a DW_TAG_module DIE,
9705 and it's not clear if/how imported objects will appear.
9706 To keep Go support simple until that's worked out,
9707 go back through what we've read and create something usable.
9708 We could do this while processing each DIE, and feels kinda cleaner,
9709 but that way is more invasive.
9710 This is to, for example, allow the user to type "p var" or "b main"
9711 without having to specify the package name, and allow lookups
9712 of module.object to work in contexts that use the expression
9716 fixup_go_packaging (struct dwarf2_cu
*cu
)
9718 char *package_name
= NULL
;
9719 struct pending
*list
;
9722 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
9724 for (i
= 0; i
< list
->nsyms
; ++i
)
9726 struct symbol
*sym
= list
->symbol
[i
];
9728 if (SYMBOL_LANGUAGE (sym
) == language_go
9729 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9731 char *this_package_name
= go_symbol_package_name (sym
);
9733 if (this_package_name
== NULL
)
9735 if (package_name
== NULL
)
9736 package_name
= this_package_name
;
9739 struct objfile
*objfile
9740 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9741 if (strcmp (package_name
, this_package_name
) != 0)
9742 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9743 (symbol_symtab (sym
) != NULL
9744 ? symtab_to_filename_for_display
9745 (symbol_symtab (sym
))
9746 : objfile_name (objfile
)),
9747 this_package_name
, package_name
);
9748 xfree (this_package_name
);
9754 if (package_name
!= NULL
)
9756 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9757 const char *saved_package_name
9758 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
9760 strlen (package_name
));
9761 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9762 saved_package_name
);
9765 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
9767 sym
= allocate_symbol (objfile
);
9768 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
9769 SYMBOL_SET_NAMES (sym
, saved_package_name
,
9770 strlen (saved_package_name
), 0, objfile
);
9771 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9772 e.g., "main" finds the "main" module and not C's main(). */
9773 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9774 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9775 SYMBOL_TYPE (sym
) = type
;
9777 add_symbol_to_list (sym
, &global_symbols
);
9779 xfree (package_name
);
9783 /* Allocate a fully-qualified name consisting of the two parts on the
9787 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9789 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9792 /* A helper that allocates a struct discriminant_info to attach to a
9795 static struct discriminant_info
*
9796 alloc_discriminant_info (struct type
*type
, int discriminant_index
,
9799 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9800 gdb_assert (discriminant_index
== -1
9801 || (discriminant_index
>= 0
9802 && discriminant_index
< TYPE_NFIELDS (type
)));
9803 gdb_assert (default_index
== -1
9804 || (default_index
>= 0 && default_index
< TYPE_NFIELDS (type
)));
9806 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
9808 struct discriminant_info
*disc
9809 = ((struct discriminant_info
*)
9811 offsetof (struct discriminant_info
, discriminants
)
9812 + TYPE_NFIELDS (type
) * sizeof (disc
->discriminants
[0])));
9813 disc
->default_index
= default_index
;
9814 disc
->discriminant_index
= discriminant_index
;
9816 struct dynamic_prop prop
;
9817 prop
.kind
= PROP_UNDEFINED
;
9818 prop
.data
.baton
= disc
;
9820 add_dyn_prop (DYN_PROP_DISCRIMINATED
, prop
, type
);
9825 /* Some versions of rustc emitted enums in an unusual way.
9827 Ordinary enums were emitted as unions. The first element of each
9828 structure in the union was named "RUST$ENUM$DISR". This element
9829 held the discriminant.
9831 These versions of Rust also implemented the "non-zero"
9832 optimization. When the enum had two values, and one is empty and
9833 the other holds a pointer that cannot be zero, the pointer is used
9834 as the discriminant, with a zero value meaning the empty variant.
9835 Here, the union's first member is of the form
9836 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9837 where the fieldnos are the indices of the fields that should be
9838 traversed in order to find the field (which may be several fields deep)
9839 and the variantname is the name of the variant of the case when the
9842 This function recognizes whether TYPE is of one of these forms,
9843 and, if so, smashes it to be a variant type. */
9846 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9848 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9850 /* We don't need to deal with empty enums. */
9851 if (TYPE_NFIELDS (type
) == 0)
9854 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9855 if (TYPE_NFIELDS (type
) == 1
9856 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9858 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9860 /* Decode the field name to find the offset of the
9862 ULONGEST bit_offset
= 0;
9863 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9864 while (name
[0] >= '0' && name
[0] <= '9')
9867 unsigned long index
= strtoul (name
, &tail
, 10);
9870 || index
>= TYPE_NFIELDS (field_type
)
9871 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9872 != FIELD_LOC_KIND_BITPOS
))
9874 complaint (_("Could not parse Rust enum encoding string \"%s\""
9876 TYPE_FIELD_NAME (type
, 0),
9877 objfile_name (objfile
));
9882 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9883 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9886 /* Make a union to hold the variants. */
9887 struct type
*union_type
= alloc_type (objfile
);
9888 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9889 TYPE_NFIELDS (union_type
) = 3;
9890 TYPE_FIELDS (union_type
)
9891 = (struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
));
9892 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9893 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
9895 /* Put the discriminant must at index 0. */
9896 TYPE_FIELD_TYPE (union_type
, 0) = field_type
;
9897 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
9898 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
9899 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 0), bit_offset
);
9901 /* The order of fields doesn't really matter, so put the real
9902 field at index 1 and the data-less field at index 2. */
9903 struct discriminant_info
*disc
9904 = alloc_discriminant_info (union_type
, 0, 1);
9905 TYPE_FIELD (union_type
, 1) = TYPE_FIELD (type
, 0);
9906 TYPE_FIELD_NAME (union_type
, 1)
9907 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1)));
9908 TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1))
9909 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9910 TYPE_FIELD_NAME (union_type
, 1));
9912 const char *dataless_name
9913 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9915 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9917 TYPE_FIELD_TYPE (union_type
, 2) = dataless_type
;
9918 /* NAME points into the original discriminant name, which
9919 already has the correct lifetime. */
9920 TYPE_FIELD_NAME (union_type
, 2) = name
;
9921 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 2), 0);
9922 disc
->discriminants
[2] = 0;
9924 /* Smash this type to be a structure type. We have to do this
9925 because the type has already been recorded. */
9926 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9927 TYPE_NFIELDS (type
) = 1;
9929 = (struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
));
9931 /* Install the variant part. */
9932 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9933 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9934 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
9936 else if (TYPE_NFIELDS (type
) == 1)
9938 /* We assume that a union with a single field is a univariant
9940 /* Smash this type to be a structure type. We have to do this
9941 because the type has already been recorded. */
9942 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9944 /* Make a union to hold the variants. */
9945 struct type
*union_type
= alloc_type (objfile
);
9946 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9947 TYPE_NFIELDS (union_type
) = TYPE_NFIELDS (type
);
9948 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9949 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
9950 TYPE_FIELDS (union_type
) = TYPE_FIELDS (type
);
9952 struct type
*field_type
= TYPE_FIELD_TYPE (union_type
, 0);
9953 const char *variant_name
9954 = rust_last_path_segment (TYPE_NAME (field_type
));
9955 TYPE_FIELD_NAME (union_type
, 0) = variant_name
;
9956 TYPE_NAME (field_type
)
9957 = rust_fully_qualify (&objfile
->objfile_obstack
,
9958 TYPE_NAME (type
), variant_name
);
9960 /* Install the union in the outer struct type. */
9961 TYPE_NFIELDS (type
) = 1;
9963 = (struct field
*) TYPE_ZALLOC (union_type
, sizeof (struct field
));
9964 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9965 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
9966 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9968 alloc_discriminant_info (union_type
, -1, 0);
9972 struct type
*disr_type
= nullptr;
9973 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
9975 disr_type
= TYPE_FIELD_TYPE (type
, i
);
9977 if (TYPE_CODE (disr_type
) != TYPE_CODE_STRUCT
)
9979 /* All fields of a true enum will be structs. */
9982 else if (TYPE_NFIELDS (disr_type
) == 0)
9984 /* Could be data-less variant, so keep going. */
9985 disr_type
= nullptr;
9987 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
9988 "RUST$ENUM$DISR") != 0)
9990 /* Not a Rust enum. */
10000 /* If we got here without a discriminant, then it's probably
10002 if (disr_type
== nullptr)
10005 /* Smash this type to be a structure type. We have to do this
10006 because the type has already been recorded. */
10007 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10009 /* Make a union to hold the variants. */
10010 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
10011 struct type
*union_type
= alloc_type (objfile
);
10012 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10013 TYPE_NFIELDS (union_type
) = 1 + TYPE_NFIELDS (type
);
10014 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10015 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
10016 TYPE_FIELDS (union_type
)
10017 = (struct field
*) TYPE_ZALLOC (union_type
,
10018 (TYPE_NFIELDS (union_type
)
10019 * sizeof (struct field
)));
10021 memcpy (TYPE_FIELDS (union_type
) + 1, TYPE_FIELDS (type
),
10022 TYPE_NFIELDS (type
) * sizeof (struct field
));
10024 /* Install the discriminant at index 0 in the union. */
10025 TYPE_FIELD (union_type
, 0) = *disr_field
;
10026 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
10027 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
10029 /* Install the union in the outer struct type. */
10030 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10031 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10032 TYPE_NFIELDS (type
) = 1;
10034 /* Set the size and offset of the union type. */
10035 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10037 /* We need a way to find the correct discriminant given a
10038 variant name. For convenience we build a map here. */
10039 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
10040 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
10041 for (int i
= 0; i
< TYPE_NFIELDS (enum_type
); ++i
)
10043 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
10046 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
10047 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
10051 int n_fields
= TYPE_NFIELDS (union_type
);
10052 struct discriminant_info
*disc
10053 = alloc_discriminant_info (union_type
, 0, -1);
10054 /* Skip the discriminant here. */
10055 for (int i
= 1; i
< n_fields
; ++i
)
10057 /* Find the final word in the name of this variant's type.
10058 That name can be used to look up the correct
10060 const char *variant_name
10061 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
,
10064 auto iter
= discriminant_map
.find (variant_name
);
10065 if (iter
!= discriminant_map
.end ())
10066 disc
->discriminants
[i
] = iter
->second
;
10068 /* Remove the discriminant field, if it exists. */
10069 struct type
*sub_type
= TYPE_FIELD_TYPE (union_type
, i
);
10070 if (TYPE_NFIELDS (sub_type
) > 0)
10072 --TYPE_NFIELDS (sub_type
);
10073 ++TYPE_FIELDS (sub_type
);
10075 TYPE_FIELD_NAME (union_type
, i
) = variant_name
;
10076 TYPE_NAME (sub_type
)
10077 = rust_fully_qualify (&objfile
->objfile_obstack
,
10078 TYPE_NAME (type
), variant_name
);
10083 /* Rewrite some Rust unions to be structures with variants parts. */
10086 rust_union_quirks (struct dwarf2_cu
*cu
)
10088 gdb_assert (cu
->language
== language_rust
);
10089 for (struct type
*type
: cu
->rust_unions
)
10090 quirk_rust_enum (type
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
10091 /* We don't need this any more. */
10092 cu
->rust_unions
.clear ();
10095 /* Return the symtab for PER_CU. This works properly regardless of
10096 whether we're using the index or psymtabs. */
10098 static struct compunit_symtab
*
10099 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
10101 return (per_cu
->dwarf2_per_objfile
->using_index
10102 ? per_cu
->v
.quick
->compunit_symtab
10103 : per_cu
->v
.psymtab
->compunit_symtab
);
10106 /* A helper function for computing the list of all symbol tables
10107 included by PER_CU. */
10110 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
10111 htab_t all_children
, htab_t all_type_symtabs
,
10112 struct dwarf2_per_cu_data
*per_cu
,
10113 struct compunit_symtab
*immediate_parent
)
10117 struct compunit_symtab
*cust
;
10118 struct dwarf2_per_cu_data
*iter
;
10120 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
10123 /* This inclusion and its children have been processed. */
10128 /* Only add a CU if it has a symbol table. */
10129 cust
= get_compunit_symtab (per_cu
);
10132 /* If this is a type unit only add its symbol table if we haven't
10133 seen it yet (type unit per_cu's can share symtabs). */
10134 if (per_cu
->is_debug_types
)
10136 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
10140 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
10141 if (cust
->user
== NULL
)
10142 cust
->user
= immediate_parent
;
10147 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
10148 if (cust
->user
== NULL
)
10149 cust
->user
= immediate_parent
;
10154 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
10157 recursively_compute_inclusions (result
, all_children
,
10158 all_type_symtabs
, iter
, cust
);
10162 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
10166 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
10168 gdb_assert (! per_cu
->is_debug_types
);
10170 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
10173 struct dwarf2_per_cu_data
*per_cu_iter
;
10174 struct compunit_symtab
*compunit_symtab_iter
;
10175 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
10176 htab_t all_children
, all_type_symtabs
;
10177 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
10179 /* If we don't have a symtab, we can just skip this case. */
10183 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10184 NULL
, xcalloc
, xfree
);
10185 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10186 NULL
, xcalloc
, xfree
);
10189 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
10193 recursively_compute_inclusions (&result_symtabs
, all_children
,
10194 all_type_symtabs
, per_cu_iter
,
10198 /* Now we have a transitive closure of all the included symtabs. */
10199 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
10201 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
10202 struct compunit_symtab
*, len
+ 1);
10204 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
10205 compunit_symtab_iter
);
10207 cust
->includes
[ix
] = compunit_symtab_iter
;
10208 cust
->includes
[len
] = NULL
;
10210 VEC_free (compunit_symtab_ptr
, result_symtabs
);
10211 htab_delete (all_children
);
10212 htab_delete (all_type_symtabs
);
10216 /* Compute the 'includes' field for the symtabs of all the CUs we just
10220 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
10223 struct dwarf2_per_cu_data
*iter
;
10226 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
10230 if (! iter
->is_debug_types
)
10231 compute_compunit_symtab_includes (iter
);
10234 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
10237 /* Generate full symbol information for PER_CU, whose DIEs have
10238 already been loaded into memory. */
10241 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
10242 enum language pretend_language
)
10244 struct dwarf2_cu
*cu
= per_cu
->cu
;
10245 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10246 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10247 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10248 CORE_ADDR lowpc
, highpc
;
10249 struct compunit_symtab
*cust
;
10250 CORE_ADDR baseaddr
;
10251 struct block
*static_block
;
10254 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10257 scoped_free_pendings free_pending
;
10259 /* Clear the list here in case something was left over. */
10260 cu
->method_list
.clear ();
10262 cu
->list_in_scope
= &file_symbols
;
10264 cu
->language
= pretend_language
;
10265 cu
->language_defn
= language_def (cu
->language
);
10267 /* Do line number decoding in read_file_scope () */
10268 process_die (cu
->dies
, cu
);
10270 /* For now fudge the Go package. */
10271 if (cu
->language
== language_go
)
10272 fixup_go_packaging (cu
);
10274 /* Now that we have processed all the DIEs in the CU, all the types
10275 should be complete, and it should now be safe to compute all of the
10277 compute_delayed_physnames (cu
);
10279 if (cu
->language
== language_rust
)
10280 rust_union_quirks (cu
);
10282 /* Some compilers don't define a DW_AT_high_pc attribute for the
10283 compilation unit. If the DW_AT_high_pc is missing, synthesize
10284 it, by scanning the DIE's below the compilation unit. */
10285 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
10287 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
10288 static_block
= end_symtab_get_static_block (addr
, 0, 1);
10290 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
10291 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
10292 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
10293 addrmap to help ensure it has an accurate map of pc values belonging to
10295 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
10297 cust
= end_symtab_from_static_block (static_block
,
10298 SECT_OFF_TEXT (objfile
), 0);
10302 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
10304 /* Set symtab language to language from DW_AT_language. If the
10305 compilation is from a C file generated by language preprocessors, do
10306 not set the language if it was already deduced by start_subfile. */
10307 if (!(cu
->language
== language_c
10308 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
10309 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10311 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
10312 produce DW_AT_location with location lists but it can be possibly
10313 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
10314 there were bugs in prologue debug info, fixed later in GCC-4.5
10315 by "unwind info for epilogues" patch (which is not directly related).
10317 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
10318 needed, it would be wrong due to missing DW_AT_producer there.
10320 Still one can confuse GDB by using non-standard GCC compilation
10321 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
10323 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
10324 cust
->locations_valid
= 1;
10326 if (gcc_4_minor
>= 5)
10327 cust
->epilogue_unwind_valid
= 1;
10329 cust
->call_site_htab
= cu
->call_site_htab
;
10332 if (dwarf2_per_objfile
->using_index
)
10333 per_cu
->v
.quick
->compunit_symtab
= cust
;
10336 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10337 pst
->compunit_symtab
= cust
;
10341 /* Push it for inclusion processing later. */
10342 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
10345 /* Generate full symbol information for type unit PER_CU, whose DIEs have
10346 already been loaded into memory. */
10349 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
10350 enum language pretend_language
)
10352 struct dwarf2_cu
*cu
= per_cu
->cu
;
10353 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10354 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10355 struct compunit_symtab
*cust
;
10356 struct signatured_type
*sig_type
;
10358 gdb_assert (per_cu
->is_debug_types
);
10359 sig_type
= (struct signatured_type
*) per_cu
;
10362 scoped_free_pendings free_pending
;
10364 /* Clear the list here in case something was left over. */
10365 cu
->method_list
.clear ();
10367 cu
->list_in_scope
= &file_symbols
;
10369 cu
->language
= pretend_language
;
10370 cu
->language_defn
= language_def (cu
->language
);
10372 /* The symbol tables are set up in read_type_unit_scope. */
10373 process_die (cu
->dies
, cu
);
10375 /* For now fudge the Go package. */
10376 if (cu
->language
== language_go
)
10377 fixup_go_packaging (cu
);
10379 /* Now that we have processed all the DIEs in the CU, all the types
10380 should be complete, and it should now be safe to compute all of the
10382 compute_delayed_physnames (cu
);
10384 if (cu
->language
== language_rust
)
10385 rust_union_quirks (cu
);
10387 /* TUs share symbol tables.
10388 If this is the first TU to use this symtab, complete the construction
10389 of it with end_expandable_symtab. Otherwise, complete the addition of
10390 this TU's symbols to the existing symtab. */
10391 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
10393 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
10394 sig_type
->type_unit_group
->compunit_symtab
= cust
;
10398 /* Set symtab language to language from DW_AT_language. If the
10399 compilation is from a C file generated by language preprocessors,
10400 do not set the language if it was already deduced by
10402 if (!(cu
->language
== language_c
10403 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
10404 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10409 augment_type_symtab ();
10410 cust
= sig_type
->type_unit_group
->compunit_symtab
;
10413 if (dwarf2_per_objfile
->using_index
)
10414 per_cu
->v
.quick
->compunit_symtab
= cust
;
10417 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10418 pst
->compunit_symtab
= cust
;
10423 /* Process an imported unit DIE. */
10426 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10428 struct attribute
*attr
;
10430 /* For now we don't handle imported units in type units. */
10431 if (cu
->per_cu
->is_debug_types
)
10433 error (_("Dwarf Error: DW_TAG_imported_unit is not"
10434 " supported in type units [in module %s]"),
10435 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
10438 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10441 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
10442 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
10443 dwarf2_per_cu_data
*per_cu
10444 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
10445 cu
->per_cu
->dwarf2_per_objfile
);
10447 /* If necessary, add it to the queue and load its DIEs. */
10448 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
10449 load_full_comp_unit (per_cu
, false, cu
->language
);
10451 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
10456 /* RAII object that represents a process_die scope: i.e.,
10457 starts/finishes processing a DIE. */
10458 class process_die_scope
10461 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
10462 : m_die (die
), m_cu (cu
)
10464 /* We should only be processing DIEs not already in process. */
10465 gdb_assert (!m_die
->in_process
);
10466 m_die
->in_process
= true;
10469 ~process_die_scope ()
10471 m_die
->in_process
= false;
10473 /* If we're done processing the DIE for the CU that owns the line
10474 header, we don't need the line header anymore. */
10475 if (m_cu
->line_header_die_owner
== m_die
)
10477 delete m_cu
->line_header
;
10478 m_cu
->line_header
= NULL
;
10479 m_cu
->line_header_die_owner
= NULL
;
10488 /* Process a die and its children. */
10491 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10493 process_die_scope
scope (die
, cu
);
10497 case DW_TAG_padding
:
10499 case DW_TAG_compile_unit
:
10500 case DW_TAG_partial_unit
:
10501 read_file_scope (die
, cu
);
10503 case DW_TAG_type_unit
:
10504 read_type_unit_scope (die
, cu
);
10506 case DW_TAG_subprogram
:
10507 case DW_TAG_inlined_subroutine
:
10508 read_func_scope (die
, cu
);
10510 case DW_TAG_lexical_block
:
10511 case DW_TAG_try_block
:
10512 case DW_TAG_catch_block
:
10513 read_lexical_block_scope (die
, cu
);
10515 case DW_TAG_call_site
:
10516 case DW_TAG_GNU_call_site
:
10517 read_call_site_scope (die
, cu
);
10519 case DW_TAG_class_type
:
10520 case DW_TAG_interface_type
:
10521 case DW_TAG_structure_type
:
10522 case DW_TAG_union_type
:
10523 process_structure_scope (die
, cu
);
10525 case DW_TAG_enumeration_type
:
10526 process_enumeration_scope (die
, cu
);
10529 /* These dies have a type, but processing them does not create
10530 a symbol or recurse to process the children. Therefore we can
10531 read them on-demand through read_type_die. */
10532 case DW_TAG_subroutine_type
:
10533 case DW_TAG_set_type
:
10534 case DW_TAG_array_type
:
10535 case DW_TAG_pointer_type
:
10536 case DW_TAG_ptr_to_member_type
:
10537 case DW_TAG_reference_type
:
10538 case DW_TAG_rvalue_reference_type
:
10539 case DW_TAG_string_type
:
10542 case DW_TAG_base_type
:
10543 case DW_TAG_subrange_type
:
10544 case DW_TAG_typedef
:
10545 /* Add a typedef symbol for the type definition, if it has a
10547 new_symbol (die
, read_type_die (die
, cu
), cu
);
10549 case DW_TAG_common_block
:
10550 read_common_block (die
, cu
);
10552 case DW_TAG_common_inclusion
:
10554 case DW_TAG_namespace
:
10555 cu
->processing_has_namespace_info
= 1;
10556 read_namespace (die
, cu
);
10558 case DW_TAG_module
:
10559 cu
->processing_has_namespace_info
= 1;
10560 read_module (die
, cu
);
10562 case DW_TAG_imported_declaration
:
10563 cu
->processing_has_namespace_info
= 1;
10564 if (read_namespace_alias (die
, cu
))
10566 /* The declaration is not a global namespace alias. */
10567 /* Fall through. */
10568 case DW_TAG_imported_module
:
10569 cu
->processing_has_namespace_info
= 1;
10570 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10571 || cu
->language
!= language_fortran
))
10572 complaint (_("Tag '%s' has unexpected children"),
10573 dwarf_tag_name (die
->tag
));
10574 read_import_statement (die
, cu
);
10577 case DW_TAG_imported_unit
:
10578 process_imported_unit_die (die
, cu
);
10581 case DW_TAG_variable
:
10582 read_variable (die
, cu
);
10586 new_symbol (die
, NULL
, cu
);
10591 /* DWARF name computation. */
10593 /* A helper function for dwarf2_compute_name which determines whether DIE
10594 needs to have the name of the scope prepended to the name listed in the
10598 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10600 struct attribute
*attr
;
10604 case DW_TAG_namespace
:
10605 case DW_TAG_typedef
:
10606 case DW_TAG_class_type
:
10607 case DW_TAG_interface_type
:
10608 case DW_TAG_structure_type
:
10609 case DW_TAG_union_type
:
10610 case DW_TAG_enumeration_type
:
10611 case DW_TAG_enumerator
:
10612 case DW_TAG_subprogram
:
10613 case DW_TAG_inlined_subroutine
:
10614 case DW_TAG_member
:
10615 case DW_TAG_imported_declaration
:
10618 case DW_TAG_variable
:
10619 case DW_TAG_constant
:
10620 /* We only need to prefix "globally" visible variables. These include
10621 any variable marked with DW_AT_external or any variable that
10622 lives in a namespace. [Variables in anonymous namespaces
10623 require prefixing, but they are not DW_AT_external.] */
10625 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10627 struct dwarf2_cu
*spec_cu
= cu
;
10629 return die_needs_namespace (die_specification (die
, &spec_cu
),
10633 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10634 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10635 && die
->parent
->tag
!= DW_TAG_module
)
10637 /* A variable in a lexical block of some kind does not need a
10638 namespace, even though in C++ such variables may be external
10639 and have a mangled name. */
10640 if (die
->parent
->tag
== DW_TAG_lexical_block
10641 || die
->parent
->tag
== DW_TAG_try_block
10642 || die
->parent
->tag
== DW_TAG_catch_block
10643 || die
->parent
->tag
== DW_TAG_subprogram
)
10652 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10653 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10654 defined for the given DIE. */
10656 static struct attribute
*
10657 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10659 struct attribute
*attr
;
10661 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10663 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10668 /* Return the DIE's linkage name as a string, 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 const char *
10673 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10675 const char *linkage_name
;
10677 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10678 if (linkage_name
== NULL
)
10679 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10681 return linkage_name
;
10684 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10685 compute the physname for the object, which include a method's:
10686 - formal parameters (C++),
10687 - receiver type (Go),
10689 The term "physname" is a bit confusing.
10690 For C++, for example, it is the demangled name.
10691 For Go, for example, it's the mangled name.
10693 For Ada, return the DIE's linkage name rather than the fully qualified
10694 name. PHYSNAME is ignored..
10696 The result is allocated on the objfile_obstack and canonicalized. */
10698 static const char *
10699 dwarf2_compute_name (const char *name
,
10700 struct die_info
*die
, struct dwarf2_cu
*cu
,
10703 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10706 name
= dwarf2_name (die
, cu
);
10708 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10709 but otherwise compute it by typename_concat inside GDB.
10710 FIXME: Actually this is not really true, or at least not always true.
10711 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
10712 Fortran names because there is no mangling standard. So new_symbol
10713 will set the demangled name to the result of dwarf2_full_name, and it is
10714 the demangled name that GDB uses if it exists. */
10715 if (cu
->language
== language_ada
10716 || (cu
->language
== language_fortran
&& physname
))
10718 /* For Ada unit, we prefer the linkage name over the name, as
10719 the former contains the exported name, which the user expects
10720 to be able to reference. Ideally, we want the user to be able
10721 to reference this entity using either natural or linkage name,
10722 but we haven't started looking at this enhancement yet. */
10723 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10725 if (linkage_name
!= NULL
)
10726 return linkage_name
;
10729 /* These are the only languages we know how to qualify names in. */
10731 && (cu
->language
== language_cplus
10732 || cu
->language
== language_fortran
|| cu
->language
== language_d
10733 || cu
->language
== language_rust
))
10735 if (die_needs_namespace (die
, cu
))
10737 const char *prefix
;
10738 const char *canonical_name
= NULL
;
10742 prefix
= determine_prefix (die
, cu
);
10743 if (*prefix
!= '\0')
10745 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
10748 buf
.puts (prefixed_name
);
10749 xfree (prefixed_name
);
10754 /* Template parameters may be specified in the DIE's DW_AT_name, or
10755 as children with DW_TAG_template_type_param or
10756 DW_TAG_value_type_param. If the latter, add them to the name
10757 here. If the name already has template parameters, then
10758 skip this step; some versions of GCC emit both, and
10759 it is more efficient to use the pre-computed name.
10761 Something to keep in mind about this process: it is very
10762 unlikely, or in some cases downright impossible, to produce
10763 something that will match the mangled name of a function.
10764 If the definition of the function has the same debug info,
10765 we should be able to match up with it anyway. But fallbacks
10766 using the minimal symbol, for instance to find a method
10767 implemented in a stripped copy of libstdc++, will not work.
10768 If we do not have debug info for the definition, we will have to
10769 match them up some other way.
10771 When we do name matching there is a related problem with function
10772 templates; two instantiated function templates are allowed to
10773 differ only by their return types, which we do not add here. */
10775 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10777 struct attribute
*attr
;
10778 struct die_info
*child
;
10781 die
->building_fullname
= 1;
10783 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10787 const gdb_byte
*bytes
;
10788 struct dwarf2_locexpr_baton
*baton
;
10791 if (child
->tag
!= DW_TAG_template_type_param
10792 && child
->tag
!= DW_TAG_template_value_param
)
10803 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10806 complaint (_("template parameter missing DW_AT_type"));
10807 buf
.puts ("UNKNOWN_TYPE");
10810 type
= die_type (child
, cu
);
10812 if (child
->tag
== DW_TAG_template_type_param
)
10814 c_print_type (type
, "", &buf
, -1, 0, &type_print_raw_options
);
10818 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10821 complaint (_("template parameter missing "
10822 "DW_AT_const_value"));
10823 buf
.puts ("UNKNOWN_VALUE");
10827 dwarf2_const_value_attr (attr
, type
, name
,
10828 &cu
->comp_unit_obstack
, cu
,
10829 &value
, &bytes
, &baton
);
10831 if (TYPE_NOSIGN (type
))
10832 /* GDB prints characters as NUMBER 'CHAR'. If that's
10833 changed, this can use value_print instead. */
10834 c_printchar (value
, type
, &buf
);
10837 struct value_print_options opts
;
10840 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10844 else if (bytes
!= NULL
)
10846 v
= allocate_value (type
);
10847 memcpy (value_contents_writeable (v
), bytes
,
10848 TYPE_LENGTH (type
));
10851 v
= value_from_longest (type
, value
);
10853 /* Specify decimal so that we do not depend on
10855 get_formatted_print_options (&opts
, 'd');
10857 value_print (v
, &buf
, &opts
);
10862 die
->building_fullname
= 0;
10866 /* Close the argument list, with a space if necessary
10867 (nested templates). */
10868 if (!buf
.empty () && buf
.string ().back () == '>')
10875 /* For C++ methods, append formal parameter type
10876 information, if PHYSNAME. */
10878 if (physname
&& die
->tag
== DW_TAG_subprogram
10879 && cu
->language
== language_cplus
)
10881 struct type
*type
= read_type_die (die
, cu
);
10883 c_type_print_args (type
, &buf
, 1, cu
->language
,
10884 &type_print_raw_options
);
10886 if (cu
->language
== language_cplus
)
10888 /* Assume that an artificial first parameter is
10889 "this", but do not crash if it is not. RealView
10890 marks unnamed (and thus unused) parameters as
10891 artificial; there is no way to differentiate
10893 if (TYPE_NFIELDS (type
) > 0
10894 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10895 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
10896 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10898 buf
.puts (" const");
10902 const std::string
&intermediate_name
= buf
.string ();
10904 if (cu
->language
== language_cplus
)
10906 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10907 &objfile
->per_bfd
->storage_obstack
);
10909 /* If we only computed INTERMEDIATE_NAME, or if
10910 INTERMEDIATE_NAME is already canonical, then we need to
10911 copy it to the appropriate obstack. */
10912 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10913 name
= ((const char *)
10914 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
10915 intermediate_name
.c_str (),
10916 intermediate_name
.length ()));
10918 name
= canonical_name
;
10925 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10926 If scope qualifiers are appropriate they will be added. The result
10927 will be allocated on the storage_obstack, or NULL if the DIE does
10928 not have a name. NAME may either be from a previous call to
10929 dwarf2_name or NULL.
10931 The output string will be canonicalized (if C++). */
10933 static const char *
10934 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10936 return dwarf2_compute_name (name
, die
, cu
, 0);
10939 /* Construct a physname for the given DIE in CU. NAME may either be
10940 from a previous call to dwarf2_name or NULL. The result will be
10941 allocated on the objfile_objstack or NULL if the DIE does not have a
10944 The output string will be canonicalized (if C++). */
10946 static const char *
10947 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10949 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10950 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10953 /* In this case dwarf2_compute_name is just a shortcut not building anything
10955 if (!die_needs_namespace (die
, cu
))
10956 return dwarf2_compute_name (name
, die
, cu
, 1);
10958 mangled
= dw2_linkage_name (die
, cu
);
10960 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10961 See https://github.com/rust-lang/rust/issues/32925. */
10962 if (cu
->language
== language_rust
&& mangled
!= NULL
10963 && strchr (mangled
, '{') != NULL
)
10966 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
10968 gdb::unique_xmalloc_ptr
<char> demangled
;
10969 if (mangled
!= NULL
)
10972 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
10974 /* Do nothing (do not demangle the symbol name). */
10976 else if (cu
->language
== language_go
)
10978 /* This is a lie, but we already lie to the caller new_symbol.
10979 new_symbol assumes we return the mangled name.
10980 This just undoes that lie until things are cleaned up. */
10984 /* Use DMGL_RET_DROP for C++ template functions to suppress
10985 their return type. It is easier for GDB users to search
10986 for such functions as `name(params)' than `long name(params)'.
10987 In such case the minimal symbol names do not match the full
10988 symbol names but for template functions there is never a need
10989 to look up their definition from their declaration so
10990 the only disadvantage remains the minimal symbol variant
10991 `long name(params)' does not have the proper inferior type. */
10992 demangled
.reset (gdb_demangle (mangled
,
10993 (DMGL_PARAMS
| DMGL_ANSI
10994 | DMGL_RET_DROP
)));
10997 canon
= demangled
.get ();
11005 if (canon
== NULL
|| check_physname
)
11007 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
11009 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
11011 /* It may not mean a bug in GDB. The compiler could also
11012 compute DW_AT_linkage_name incorrectly. But in such case
11013 GDB would need to be bug-to-bug compatible. */
11015 complaint (_("Computed physname <%s> does not match demangled <%s> "
11016 "(from linkage <%s>) - DIE at %s [in module %s]"),
11017 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
11018 objfile_name (objfile
));
11020 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
11021 is available here - over computed PHYSNAME. It is safer
11022 against both buggy GDB and buggy compilers. */
11036 retval
= ((const char *)
11037 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
11038 retval
, strlen (retval
)));
11043 /* Inspect DIE in CU for a namespace alias. If one exists, record
11044 a new symbol for it.
11046 Returns 1 if a namespace alias was recorded, 0 otherwise. */
11049 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
11051 struct attribute
*attr
;
11053 /* If the die does not have a name, this is not a namespace
11055 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11059 struct die_info
*d
= die
;
11060 struct dwarf2_cu
*imported_cu
= cu
;
11062 /* If the compiler has nested DW_AT_imported_declaration DIEs,
11063 keep inspecting DIEs until we hit the underlying import. */
11064 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
11065 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
11067 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
11071 d
= follow_die_ref (d
, attr
, &imported_cu
);
11072 if (d
->tag
!= DW_TAG_imported_declaration
)
11076 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
11078 complaint (_("DIE at %s has too many recursively imported "
11079 "declarations"), sect_offset_str (d
->sect_off
));
11086 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
11088 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
11089 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
11091 /* This declaration is a global namespace alias. Add
11092 a symbol for it whose type is the aliased namespace. */
11093 new_symbol (die
, type
, cu
);
11102 /* Return the using directives repository (global or local?) to use in the
11103 current context for LANGUAGE.
11105 For Ada, imported declarations can materialize renamings, which *may* be
11106 global. However it is impossible (for now?) in DWARF to distinguish
11107 "external" imported declarations and "static" ones. As all imported
11108 declarations seem to be static in all other languages, make them all CU-wide
11109 global only in Ada. */
11111 static struct using_direct
**
11112 using_directives (enum language language
)
11114 if (language
== language_ada
&& context_stack_depth
== 0)
11115 return &global_using_directives
;
11117 return &local_using_directives
;
11120 /* Read the import statement specified by the given die and record it. */
11123 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
11125 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11126 struct attribute
*import_attr
;
11127 struct die_info
*imported_die
, *child_die
;
11128 struct dwarf2_cu
*imported_cu
;
11129 const char *imported_name
;
11130 const char *imported_name_prefix
;
11131 const char *canonical_name
;
11132 const char *import_alias
;
11133 const char *imported_declaration
= NULL
;
11134 const char *import_prefix
;
11135 std::vector
<const char *> excludes
;
11137 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
11138 if (import_attr
== NULL
)
11140 complaint (_("Tag '%s' has no DW_AT_import"),
11141 dwarf_tag_name (die
->tag
));
11146 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
11147 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11148 if (imported_name
== NULL
)
11150 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
11152 The import in the following code:
11166 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
11167 <52> DW_AT_decl_file : 1
11168 <53> DW_AT_decl_line : 6
11169 <54> DW_AT_import : <0x75>
11170 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
11171 <59> DW_AT_name : B
11172 <5b> DW_AT_decl_file : 1
11173 <5c> DW_AT_decl_line : 2
11174 <5d> DW_AT_type : <0x6e>
11176 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
11177 <76> DW_AT_byte_size : 4
11178 <77> DW_AT_encoding : 5 (signed)
11180 imports the wrong die ( 0x75 instead of 0x58 ).
11181 This case will be ignored until the gcc bug is fixed. */
11185 /* Figure out the local name after import. */
11186 import_alias
= dwarf2_name (die
, cu
);
11188 /* Figure out where the statement is being imported to. */
11189 import_prefix
= determine_prefix (die
, cu
);
11191 /* Figure out what the scope of the imported die is and prepend it
11192 to the name of the imported die. */
11193 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
11195 if (imported_die
->tag
!= DW_TAG_namespace
11196 && imported_die
->tag
!= DW_TAG_module
)
11198 imported_declaration
= imported_name
;
11199 canonical_name
= imported_name_prefix
;
11201 else if (strlen (imported_name_prefix
) > 0)
11202 canonical_name
= obconcat (&objfile
->objfile_obstack
,
11203 imported_name_prefix
,
11204 (cu
->language
== language_d
? "." : "::"),
11205 imported_name
, (char *) NULL
);
11207 canonical_name
= imported_name
;
11209 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
11210 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11211 child_die
= sibling_die (child_die
))
11213 /* DWARF-4: A Fortran use statement with a “rename list” may be
11214 represented by an imported module entry with an import attribute
11215 referring to the module and owned entries corresponding to those
11216 entities that are renamed as part of being imported. */
11218 if (child_die
->tag
!= DW_TAG_imported_declaration
)
11220 complaint (_("child DW_TAG_imported_declaration expected "
11221 "- DIE at %s [in module %s]"),
11222 sect_offset_str (child_die
->sect_off
),
11223 objfile_name (objfile
));
11227 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
11228 if (import_attr
== NULL
)
11230 complaint (_("Tag '%s' has no DW_AT_import"),
11231 dwarf_tag_name (child_die
->tag
));
11236 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
11238 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11239 if (imported_name
== NULL
)
11241 complaint (_("child DW_TAG_imported_declaration has unknown "
11242 "imported name - DIE at %s [in module %s]"),
11243 sect_offset_str (child_die
->sect_off
),
11244 objfile_name (objfile
));
11248 excludes
.push_back (imported_name
);
11250 process_die (child_die
, cu
);
11253 add_using_directive (using_directives (cu
->language
),
11257 imported_declaration
,
11260 &objfile
->objfile_obstack
);
11263 /* ICC<14 does not output the required DW_AT_declaration on incomplete
11264 types, but gives them a size of zero. Starting with version 14,
11265 ICC is compatible with GCC. */
11268 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
11270 if (!cu
->checked_producer
)
11271 check_producer (cu
);
11273 return cu
->producer_is_icc_lt_14
;
11276 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
11277 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
11278 this, it was first present in GCC release 4.3.0. */
11281 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
11283 if (!cu
->checked_producer
)
11284 check_producer (cu
);
11286 return cu
->producer_is_gcc_lt_4_3
;
11289 static file_and_directory
11290 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
11292 file_and_directory res
;
11294 /* Find the filename. Do not use dwarf2_name here, since the filename
11295 is not a source language identifier. */
11296 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
11297 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
11299 if (res
.comp_dir
== NULL
11300 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
11301 && IS_ABSOLUTE_PATH (res
.name
))
11303 res
.comp_dir_storage
= ldirname (res
.name
);
11304 if (!res
.comp_dir_storage
.empty ())
11305 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
11307 if (res
.comp_dir
!= NULL
)
11309 /* Irix 6.2 native cc prepends <machine>.: to the compilation
11310 directory, get rid of it. */
11311 const char *cp
= strchr (res
.comp_dir
, ':');
11313 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
11314 res
.comp_dir
= cp
+ 1;
11317 if (res
.name
== NULL
)
11318 res
.name
= "<unknown>";
11323 /* Handle DW_AT_stmt_list for a compilation unit.
11324 DIE is the DW_TAG_compile_unit die for CU.
11325 COMP_DIR is the compilation directory. LOWPC is passed to
11326 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
11329 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
11330 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
11332 struct dwarf2_per_objfile
*dwarf2_per_objfile
11333 = cu
->per_cu
->dwarf2_per_objfile
;
11334 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11335 struct attribute
*attr
;
11336 struct line_header line_header_local
;
11337 hashval_t line_header_local_hash
;
11339 int decode_mapping
;
11341 gdb_assert (! cu
->per_cu
->is_debug_types
);
11343 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11347 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11349 /* The line header hash table is only created if needed (it exists to
11350 prevent redundant reading of the line table for partial_units).
11351 If we're given a partial_unit, we'll need it. If we're given a
11352 compile_unit, then use the line header hash table if it's already
11353 created, but don't create one just yet. */
11355 if (dwarf2_per_objfile
->line_header_hash
== NULL
11356 && die
->tag
== DW_TAG_partial_unit
)
11358 dwarf2_per_objfile
->line_header_hash
11359 = htab_create_alloc_ex (127, line_header_hash_voidp
,
11360 line_header_eq_voidp
,
11361 free_line_header_voidp
,
11362 &objfile
->objfile_obstack
,
11363 hashtab_obstack_allocate
,
11364 dummy_obstack_deallocate
);
11367 line_header_local
.sect_off
= line_offset
;
11368 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
11369 line_header_local_hash
= line_header_hash (&line_header_local
);
11370 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
11372 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11373 &line_header_local
,
11374 line_header_local_hash
, NO_INSERT
);
11376 /* For DW_TAG_compile_unit we need info like symtab::linetable which
11377 is not present in *SLOT (since if there is something in *SLOT then
11378 it will be for a partial_unit). */
11379 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
11381 gdb_assert (*slot
!= NULL
);
11382 cu
->line_header
= (struct line_header
*) *slot
;
11387 /* dwarf_decode_line_header does not yet provide sufficient information.
11388 We always have to call also dwarf_decode_lines for it. */
11389 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
11393 cu
->line_header
= lh
.release ();
11394 cu
->line_header_die_owner
= die
;
11396 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
11400 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11401 &line_header_local
,
11402 line_header_local_hash
, INSERT
);
11403 gdb_assert (slot
!= NULL
);
11405 if (slot
!= NULL
&& *slot
== NULL
)
11407 /* This newly decoded line number information unit will be owned
11408 by line_header_hash hash table. */
11409 *slot
= cu
->line_header
;
11410 cu
->line_header_die_owner
= NULL
;
11414 /* We cannot free any current entry in (*slot) as that struct line_header
11415 may be already used by multiple CUs. Create only temporary decoded
11416 line_header for this CU - it may happen at most once for each line
11417 number information unit. And if we're not using line_header_hash
11418 then this is what we want as well. */
11419 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
11421 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
11422 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
11427 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
11430 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11432 struct dwarf2_per_objfile
*dwarf2_per_objfile
11433 = cu
->per_cu
->dwarf2_per_objfile
;
11434 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11435 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11436 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
11437 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
11438 struct attribute
*attr
;
11439 struct die_info
*child_die
;
11440 CORE_ADDR baseaddr
;
11442 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11444 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
11446 /* If we didn't find a lowpc, set it to highpc to avoid complaints
11447 from finish_block. */
11448 if (lowpc
== ((CORE_ADDR
) -1))
11450 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11452 file_and_directory fnd
= find_file_and_directory (die
, cu
);
11454 prepare_one_comp_unit (cu
, die
, cu
->language
);
11456 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
11457 standardised yet. As a workaround for the language detection we fall
11458 back to the DW_AT_producer string. */
11459 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
11460 cu
->language
= language_opencl
;
11462 /* Similar hack for Go. */
11463 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
11464 set_cu_language (DW_LANG_Go
, cu
);
11466 dwarf2_start_symtab (cu
, fnd
.name
, fnd
.comp_dir
, lowpc
);
11468 /* Decode line number information if present. We do this before
11469 processing child DIEs, so that the line header table is available
11470 for DW_AT_decl_file. */
11471 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
11473 /* Process all dies in compilation unit. */
11474 if (die
->child
!= NULL
)
11476 child_die
= die
->child
;
11477 while (child_die
&& child_die
->tag
)
11479 process_die (child_die
, cu
);
11480 child_die
= sibling_die (child_die
);
11484 /* Decode macro information, if present. Dwarf 2 macro information
11485 refers to information in the line number info statement program
11486 header, so we can only read it if we've read the header
11488 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11490 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11491 if (attr
&& cu
->line_header
)
11493 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11494 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11496 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
11500 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11501 if (attr
&& cu
->line_header
)
11503 unsigned int macro_offset
= DW_UNSND (attr
);
11505 dwarf_decode_macros (cu
, macro_offset
, 0);
11510 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
11511 Create the set of symtabs used by this TU, or if this TU is sharing
11512 symtabs with another TU and the symtabs have already been created
11513 then restore those symtabs in the line header.
11514 We don't need the pc/line-number mapping for type units. */
11517 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
11519 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
11520 struct type_unit_group
*tu_group
;
11522 struct attribute
*attr
;
11524 struct signatured_type
*sig_type
;
11526 gdb_assert (per_cu
->is_debug_types
);
11527 sig_type
= (struct signatured_type
*) per_cu
;
11529 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11531 /* If we're using .gdb_index (includes -readnow) then
11532 per_cu->type_unit_group may not have been set up yet. */
11533 if (sig_type
->type_unit_group
== NULL
)
11534 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
11535 tu_group
= sig_type
->type_unit_group
;
11537 /* If we've already processed this stmt_list there's no real need to
11538 do it again, we could fake it and just recreate the part we need
11539 (file name,index -> symtab mapping). If data shows this optimization
11540 is useful we can do it then. */
11541 first_time
= tu_group
->compunit_symtab
== NULL
;
11543 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11548 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11549 lh
= dwarf_decode_line_header (line_offset
, cu
);
11554 dwarf2_start_symtab (cu
, "", NULL
, 0);
11557 gdb_assert (tu_group
->symtabs
== NULL
);
11558 restart_symtab (tu_group
->compunit_symtab
, "", 0);
11563 cu
->line_header
= lh
.release ();
11564 cu
->line_header_die_owner
= die
;
11568 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
11570 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11571 still initializing it, and our caller (a few levels up)
11572 process_full_type_unit still needs to know if this is the first
11575 tu_group
->num_symtabs
= cu
->line_header
->file_names
.size ();
11576 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
11577 cu
->line_header
->file_names
.size ());
11579 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
11581 file_entry
&fe
= cu
->line_header
->file_names
[i
];
11583 dwarf2_start_subfile (fe
.name
, fe
.include_dir (cu
->line_header
));
11585 if (current_subfile
->symtab
== NULL
)
11587 /* NOTE: start_subfile will recognize when it's been
11588 passed a file it has already seen. So we can't
11589 assume there's a simple mapping from
11590 cu->line_header->file_names to subfiles, plus
11591 cu->line_header->file_names may contain dups. */
11592 current_subfile
->symtab
11593 = allocate_symtab (cust
, current_subfile
->name
);
11596 fe
.symtab
= current_subfile
->symtab
;
11597 tu_group
->symtabs
[i
] = fe
.symtab
;
11602 restart_symtab (tu_group
->compunit_symtab
, "", 0);
11604 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
11606 file_entry
&fe
= cu
->line_header
->file_names
[i
];
11608 fe
.symtab
= tu_group
->symtabs
[i
];
11612 /* The main symtab is allocated last. Type units don't have DW_AT_name
11613 so they don't have a "real" (so to speak) symtab anyway.
11614 There is later code that will assign the main symtab to all symbols
11615 that don't have one. We need to handle the case of a symbol with a
11616 missing symtab (DW_AT_decl_file) anyway. */
11619 /* Process DW_TAG_type_unit.
11620 For TUs we want to skip the first top level sibling if it's not the
11621 actual type being defined by this TU. In this case the first top
11622 level sibling is there to provide context only. */
11625 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11627 struct die_info
*child_die
;
11629 prepare_one_comp_unit (cu
, die
, language_minimal
);
11631 /* Initialize (or reinitialize) the machinery for building symtabs.
11632 We do this before processing child DIEs, so that the line header table
11633 is available for DW_AT_decl_file. */
11634 setup_type_unit_groups (die
, cu
);
11636 if (die
->child
!= NULL
)
11638 child_die
= die
->child
;
11639 while (child_die
&& child_die
->tag
)
11641 process_die (child_die
, cu
);
11642 child_die
= sibling_die (child_die
);
11649 http://gcc.gnu.org/wiki/DebugFission
11650 http://gcc.gnu.org/wiki/DebugFissionDWP
11652 To simplify handling of both DWO files ("object" files with the DWARF info)
11653 and DWP files (a file with the DWOs packaged up into one file), we treat
11654 DWP files as having a collection of virtual DWO files. */
11657 hash_dwo_file (const void *item
)
11659 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11662 hash
= htab_hash_string (dwo_file
->dwo_name
);
11663 if (dwo_file
->comp_dir
!= NULL
)
11664 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11669 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11671 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11672 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11674 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11676 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11677 return lhs
->comp_dir
== rhs
->comp_dir
;
11678 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11681 /* Allocate a hash table for DWO files. */
11684 allocate_dwo_file_hash_table (struct objfile
*objfile
)
11686 return htab_create_alloc_ex (41,
11690 &objfile
->objfile_obstack
,
11691 hashtab_obstack_allocate
,
11692 dummy_obstack_deallocate
);
11695 /* Lookup DWO file DWO_NAME. */
11698 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11699 const char *dwo_name
,
11700 const char *comp_dir
)
11702 struct dwo_file find_entry
;
11705 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11706 dwarf2_per_objfile
->dwo_files
11707 = allocate_dwo_file_hash_table (dwarf2_per_objfile
->objfile
);
11709 memset (&find_entry
, 0, sizeof (find_entry
));
11710 find_entry
.dwo_name
= dwo_name
;
11711 find_entry
.comp_dir
= comp_dir
;
11712 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
11718 hash_dwo_unit (const void *item
)
11720 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11722 /* This drops the top 32 bits of the id, but is ok for a hash. */
11723 return dwo_unit
->signature
;
11727 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11729 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11730 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11732 /* The signature is assumed to be unique within the DWO file.
11733 So while object file CU dwo_id's always have the value zero,
11734 that's OK, assuming each object file DWO file has only one CU,
11735 and that's the rule for now. */
11736 return lhs
->signature
== rhs
->signature
;
11739 /* Allocate a hash table for DWO CUs,TUs.
11740 There is one of these tables for each of CUs,TUs for each DWO file. */
11743 allocate_dwo_unit_table (struct objfile
*objfile
)
11745 /* Start out with a pretty small number.
11746 Generally DWO files contain only one CU and maybe some TUs. */
11747 return htab_create_alloc_ex (3,
11751 &objfile
->objfile_obstack
,
11752 hashtab_obstack_allocate
,
11753 dummy_obstack_deallocate
);
11756 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
11758 struct create_dwo_cu_data
11760 struct dwo_file
*dwo_file
;
11761 struct dwo_unit dwo_unit
;
11764 /* die_reader_func for create_dwo_cu. */
11767 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11768 const gdb_byte
*info_ptr
,
11769 struct die_info
*comp_unit_die
,
11773 struct dwarf2_cu
*cu
= reader
->cu
;
11774 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11775 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11776 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
11777 struct dwo_file
*dwo_file
= data
->dwo_file
;
11778 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
11779 struct attribute
*attr
;
11781 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
11784 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11785 " its dwo_id [in module %s]"),
11786 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11790 dwo_unit
->dwo_file
= dwo_file
;
11791 dwo_unit
->signature
= DW_UNSND (attr
);
11792 dwo_unit
->section
= section
;
11793 dwo_unit
->sect_off
= sect_off
;
11794 dwo_unit
->length
= cu
->per_cu
->length
;
11796 if (dwarf_read_debug
)
11797 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11798 sect_offset_str (sect_off
),
11799 hex_string (dwo_unit
->signature
));
11802 /* Create the dwo_units for the CUs in a DWO_FILE.
11803 Note: This function processes DWO files only, not DWP files. */
11806 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11807 struct dwo_file
&dwo_file
, dwarf2_section_info
§ion
,
11810 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11811 const gdb_byte
*info_ptr
, *end_ptr
;
11813 dwarf2_read_section (objfile
, §ion
);
11814 info_ptr
= section
.buffer
;
11816 if (info_ptr
== NULL
)
11819 if (dwarf_read_debug
)
11821 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11822 get_section_name (§ion
),
11823 get_section_file_name (§ion
));
11826 end_ptr
= info_ptr
+ section
.size
;
11827 while (info_ptr
< end_ptr
)
11829 struct dwarf2_per_cu_data per_cu
;
11830 struct create_dwo_cu_data create_dwo_cu_data
;
11831 struct dwo_unit
*dwo_unit
;
11833 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11835 memset (&create_dwo_cu_data
.dwo_unit
, 0,
11836 sizeof (create_dwo_cu_data
.dwo_unit
));
11837 memset (&per_cu
, 0, sizeof (per_cu
));
11838 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11839 per_cu
.is_debug_types
= 0;
11840 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11841 per_cu
.section
= §ion
;
11842 create_dwo_cu_data
.dwo_file
= &dwo_file
;
11844 init_cutu_and_read_dies_no_follow (
11845 &per_cu
, &dwo_file
, create_dwo_cu_reader
, &create_dwo_cu_data
);
11846 info_ptr
+= per_cu
.length
;
11848 // If the unit could not be parsed, skip it.
11849 if (create_dwo_cu_data
.dwo_unit
.dwo_file
== NULL
)
11852 if (cus_htab
== NULL
)
11853 cus_htab
= allocate_dwo_unit_table (objfile
);
11855 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11856 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
11857 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
11858 gdb_assert (slot
!= NULL
);
11861 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11862 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11864 complaint (_("debug cu entry at offset %s is duplicate to"
11865 " the entry at offset %s, signature %s"),
11866 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11867 hex_string (dwo_unit
->signature
));
11869 *slot
= (void *)dwo_unit
;
11873 /* DWP file .debug_{cu,tu}_index section format:
11874 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11878 Both index sections have the same format, and serve to map a 64-bit
11879 signature to a set of section numbers. Each section begins with a header,
11880 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11881 indexes, and a pool of 32-bit section numbers. The index sections will be
11882 aligned at 8-byte boundaries in the file.
11884 The index section header consists of:
11886 V, 32 bit version number
11888 N, 32 bit number of compilation units or type units in the index
11889 M, 32 bit number of slots in the hash table
11891 Numbers are recorded using the byte order of the application binary.
11893 The hash table begins at offset 16 in the section, and consists of an array
11894 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11895 order of the application binary). Unused slots in the hash table are 0.
11896 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11898 The parallel table begins immediately after the hash table
11899 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11900 array of 32-bit indexes (using the byte order of the application binary),
11901 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11902 table contains a 32-bit index into the pool of section numbers. For unused
11903 hash table slots, the corresponding entry in the parallel table will be 0.
11905 The pool of section numbers begins immediately following the hash table
11906 (at offset 16 + 12 * M from the beginning of the section). The pool of
11907 section numbers consists of an array of 32-bit words (using the byte order
11908 of the application binary). Each item in the array is indexed starting
11909 from 0. The hash table entry provides the index of the first section
11910 number in the set. Additional section numbers in the set follow, and the
11911 set is terminated by a 0 entry (section number 0 is not used in ELF).
11913 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11914 section must be the first entry in the set, and the .debug_abbrev.dwo must
11915 be the second entry. Other members of the set may follow in any order.
11921 DWP Version 2 combines all the .debug_info, etc. sections into one,
11922 and the entries in the index tables are now offsets into these sections.
11923 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11926 Index Section Contents:
11928 Hash Table of Signatures dwp_hash_table.hash_table
11929 Parallel Table of Indices dwp_hash_table.unit_table
11930 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
11931 Table of Section Sizes dwp_hash_table.v2.sizes
11933 The index section header consists of:
11935 V, 32 bit version number
11936 L, 32 bit number of columns in the table of section offsets
11937 N, 32 bit number of compilation units or type units in the index
11938 M, 32 bit number of slots in the hash table
11940 Numbers are recorded using the byte order of the application binary.
11942 The hash table has the same format as version 1.
11943 The parallel table of indices has the same format as version 1,
11944 except that the entries are origin-1 indices into the table of sections
11945 offsets and the table of section sizes.
11947 The table of offsets begins immediately following the parallel table
11948 (at offset 16 + 12 * M from the beginning of the section). The table is
11949 a two-dimensional array of 32-bit words (using the byte order of the
11950 application binary), with L columns and N+1 rows, in row-major order.
11951 Each row in the array is indexed starting from 0. The first row provides
11952 a key to the remaining rows: each column in this row provides an identifier
11953 for a debug section, and the offsets in the same column of subsequent rows
11954 refer to that section. The section identifiers are:
11956 DW_SECT_INFO 1 .debug_info.dwo
11957 DW_SECT_TYPES 2 .debug_types.dwo
11958 DW_SECT_ABBREV 3 .debug_abbrev.dwo
11959 DW_SECT_LINE 4 .debug_line.dwo
11960 DW_SECT_LOC 5 .debug_loc.dwo
11961 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
11962 DW_SECT_MACINFO 7 .debug_macinfo.dwo
11963 DW_SECT_MACRO 8 .debug_macro.dwo
11965 The offsets provided by the CU and TU index sections are the base offsets
11966 for the contributions made by each CU or TU to the corresponding section
11967 in the package file. Each CU and TU header contains an abbrev_offset
11968 field, used to find the abbreviations table for that CU or TU within the
11969 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
11970 be interpreted as relative to the base offset given in the index section.
11971 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
11972 should be interpreted as relative to the base offset for .debug_line.dwo,
11973 and offsets into other debug sections obtained from DWARF attributes should
11974 also be interpreted as relative to the corresponding base offset.
11976 The table of sizes begins immediately following the table of offsets.
11977 Like the table of offsets, it is a two-dimensional array of 32-bit words,
11978 with L columns and N rows, in row-major order. Each row in the array is
11979 indexed starting from 1 (row 0 is shared by the two tables).
11983 Hash table lookup is handled the same in version 1 and 2:
11985 We assume that N and M will not exceed 2^32 - 1.
11986 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
11988 Given a 64-bit compilation unit signature or a type signature S, an entry
11989 in the hash table is located as follows:
11991 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
11992 the low-order k bits all set to 1.
11994 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
11996 3) If the hash table entry at index H matches the signature, use that
11997 entry. If the hash table entry at index H is unused (all zeroes),
11998 terminate the search: the signature is not present in the table.
12000 4) Let H = (H + H') modulo M. Repeat at Step 3.
12002 Because M > N and H' and M are relatively prime, the search is guaranteed
12003 to stop at an unused slot or find the match. */
12005 /* Create a hash table to map DWO IDs to their CU/TU entry in
12006 .debug_{info,types}.dwo in DWP_FILE.
12007 Returns NULL if there isn't one.
12008 Note: This function processes DWP files only, not DWO files. */
12010 static struct dwp_hash_table
*
12011 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12012 struct dwp_file
*dwp_file
, int is_debug_types
)
12014 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12015 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12016 const gdb_byte
*index_ptr
, *index_end
;
12017 struct dwarf2_section_info
*index
;
12018 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
12019 struct dwp_hash_table
*htab
;
12021 if (is_debug_types
)
12022 index
= &dwp_file
->sections
.tu_index
;
12024 index
= &dwp_file
->sections
.cu_index
;
12026 if (dwarf2_section_empty_p (index
))
12028 dwarf2_read_section (objfile
, index
);
12030 index_ptr
= index
->buffer
;
12031 index_end
= index_ptr
+ index
->size
;
12033 version
= read_4_bytes (dbfd
, index_ptr
);
12036 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
12040 nr_units
= read_4_bytes (dbfd
, index_ptr
);
12042 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
12045 if (version
!= 1 && version
!= 2)
12047 error (_("Dwarf Error: unsupported DWP file version (%s)"
12048 " [in module %s]"),
12049 pulongest (version
), dwp_file
->name
);
12051 if (nr_slots
!= (nr_slots
& -nr_slots
))
12053 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
12054 " is not power of 2 [in module %s]"),
12055 pulongest (nr_slots
), dwp_file
->name
);
12058 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
12059 htab
->version
= version
;
12060 htab
->nr_columns
= nr_columns
;
12061 htab
->nr_units
= nr_units
;
12062 htab
->nr_slots
= nr_slots
;
12063 htab
->hash_table
= index_ptr
;
12064 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
12066 /* Exit early if the table is empty. */
12067 if (nr_slots
== 0 || nr_units
== 0
12068 || (version
== 2 && nr_columns
== 0))
12070 /* All must be zero. */
12071 if (nr_slots
!= 0 || nr_units
!= 0
12072 || (version
== 2 && nr_columns
!= 0))
12074 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
12075 " all zero [in modules %s]"),
12083 htab
->section_pool
.v1
.indices
=
12084 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12085 /* It's harder to decide whether the section is too small in v1.
12086 V1 is deprecated anyway so we punt. */
12090 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12091 int *ids
= htab
->section_pool
.v2
.section_ids
;
12092 /* Reverse map for error checking. */
12093 int ids_seen
[DW_SECT_MAX
+ 1];
12096 if (nr_columns
< 2)
12098 error (_("Dwarf Error: bad DWP hash table, too few columns"
12099 " in section table [in module %s]"),
12102 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
12104 error (_("Dwarf Error: bad DWP hash table, too many columns"
12105 " in section table [in module %s]"),
12108 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
12109 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
12110 for (i
= 0; i
< nr_columns
; ++i
)
12112 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
12114 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
12116 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
12117 " in section table [in module %s]"),
12118 id
, dwp_file
->name
);
12120 if (ids_seen
[id
] != -1)
12122 error (_("Dwarf Error: bad DWP hash table, duplicate section"
12123 " id %d in section table [in module %s]"),
12124 id
, dwp_file
->name
);
12129 /* Must have exactly one info or types section. */
12130 if (((ids_seen
[DW_SECT_INFO
] != -1)
12131 + (ids_seen
[DW_SECT_TYPES
] != -1))
12134 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
12135 " DWO info/types section [in module %s]"),
12138 /* Must have an abbrev section. */
12139 if (ids_seen
[DW_SECT_ABBREV
] == -1)
12141 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
12142 " section [in module %s]"),
12145 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
12146 htab
->section_pool
.v2
.sizes
=
12147 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
12148 * nr_units
* nr_columns
);
12149 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
12150 * nr_units
* nr_columns
))
12153 error (_("Dwarf Error: DWP index section is corrupt (too small)"
12154 " [in module %s]"),
12162 /* Update SECTIONS with the data from SECTP.
12164 This function is like the other "locate" section routines that are
12165 passed to bfd_map_over_sections, but in this context the sections to
12166 read comes from the DWP V1 hash table, not the full ELF section table.
12168 The result is non-zero for success, or zero if an error was found. */
12171 locate_v1_virtual_dwo_sections (asection
*sectp
,
12172 struct virtual_v1_dwo_sections
*sections
)
12174 const struct dwop_section_names
*names
= &dwop_section_names
;
12176 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12178 /* There can be only one. */
12179 if (sections
->abbrev
.s
.section
!= NULL
)
12181 sections
->abbrev
.s
.section
= sectp
;
12182 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12184 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
12185 || section_is_p (sectp
->name
, &names
->types_dwo
))
12187 /* There can be only one. */
12188 if (sections
->info_or_types
.s
.section
!= NULL
)
12190 sections
->info_or_types
.s
.section
= sectp
;
12191 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
12193 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12195 /* There can be only one. */
12196 if (sections
->line
.s
.section
!= NULL
)
12198 sections
->line
.s
.section
= sectp
;
12199 sections
->line
.size
= bfd_get_section_size (sectp
);
12201 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12203 /* There can be only one. */
12204 if (sections
->loc
.s
.section
!= NULL
)
12206 sections
->loc
.s
.section
= sectp
;
12207 sections
->loc
.size
= bfd_get_section_size (sectp
);
12209 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12211 /* There can be only one. */
12212 if (sections
->macinfo
.s
.section
!= NULL
)
12214 sections
->macinfo
.s
.section
= sectp
;
12215 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12217 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12219 /* There can be only one. */
12220 if (sections
->macro
.s
.section
!= NULL
)
12222 sections
->macro
.s
.section
= sectp
;
12223 sections
->macro
.size
= bfd_get_section_size (sectp
);
12225 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12227 /* There can be only one. */
12228 if (sections
->str_offsets
.s
.section
!= NULL
)
12230 sections
->str_offsets
.s
.section
= sectp
;
12231 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12235 /* No other kind of section is valid. */
12242 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12243 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12244 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12245 This is for DWP version 1 files. */
12247 static struct dwo_unit
*
12248 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12249 struct dwp_file
*dwp_file
,
12250 uint32_t unit_index
,
12251 const char *comp_dir
,
12252 ULONGEST signature
, int is_debug_types
)
12254 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12255 const struct dwp_hash_table
*dwp_htab
=
12256 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12257 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12258 const char *kind
= is_debug_types
? "TU" : "CU";
12259 struct dwo_file
*dwo_file
;
12260 struct dwo_unit
*dwo_unit
;
12261 struct virtual_v1_dwo_sections sections
;
12262 void **dwo_file_slot
;
12265 gdb_assert (dwp_file
->version
== 1);
12267 if (dwarf_read_debug
)
12269 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
12271 pulongest (unit_index
), hex_string (signature
),
12275 /* Fetch the sections of this DWO unit.
12276 Put a limit on the number of sections we look for so that bad data
12277 doesn't cause us to loop forever. */
12279 #define MAX_NR_V1_DWO_SECTIONS \
12280 (1 /* .debug_info or .debug_types */ \
12281 + 1 /* .debug_abbrev */ \
12282 + 1 /* .debug_line */ \
12283 + 1 /* .debug_loc */ \
12284 + 1 /* .debug_str_offsets */ \
12285 + 1 /* .debug_macro or .debug_macinfo */ \
12286 + 1 /* trailing zero */)
12288 memset (§ions
, 0, sizeof (sections
));
12290 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
12293 uint32_t section_nr
=
12294 read_4_bytes (dbfd
,
12295 dwp_htab
->section_pool
.v1
.indices
12296 + (unit_index
+ i
) * sizeof (uint32_t));
12298 if (section_nr
== 0)
12300 if (section_nr
>= dwp_file
->num_sections
)
12302 error (_("Dwarf Error: bad DWP hash table, section number too large"
12303 " [in module %s]"),
12307 sectp
= dwp_file
->elf_sections
[section_nr
];
12308 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
12310 error (_("Dwarf Error: bad DWP hash table, invalid section found"
12311 " [in module %s]"),
12317 || dwarf2_section_empty_p (§ions
.info_or_types
)
12318 || dwarf2_section_empty_p (§ions
.abbrev
))
12320 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
12321 " [in module %s]"),
12324 if (i
== MAX_NR_V1_DWO_SECTIONS
)
12326 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
12327 " [in module %s]"),
12331 /* It's easier for the rest of the code if we fake a struct dwo_file and
12332 have dwo_unit "live" in that. At least for now.
12334 The DWP file can be made up of a random collection of CUs and TUs.
12335 However, for each CU + set of TUs that came from the same original DWO
12336 file, we can combine them back into a virtual DWO file to save space
12337 (fewer struct dwo_file objects to allocate). Remember that for really
12338 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12340 std::string virtual_dwo_name
=
12341 string_printf ("virtual-dwo/%d-%d-%d-%d",
12342 get_section_id (§ions
.abbrev
),
12343 get_section_id (§ions
.line
),
12344 get_section_id (§ions
.loc
),
12345 get_section_id (§ions
.str_offsets
));
12346 /* Can we use an existing virtual DWO file? */
12347 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12348 virtual_dwo_name
.c_str (),
12350 /* Create one if necessary. */
12351 if (*dwo_file_slot
== NULL
)
12353 if (dwarf_read_debug
)
12355 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12356 virtual_dwo_name
.c_str ());
12358 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12360 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12361 virtual_dwo_name
.c_str (),
12362 virtual_dwo_name
.size ());
12363 dwo_file
->comp_dir
= comp_dir
;
12364 dwo_file
->sections
.abbrev
= sections
.abbrev
;
12365 dwo_file
->sections
.line
= sections
.line
;
12366 dwo_file
->sections
.loc
= sections
.loc
;
12367 dwo_file
->sections
.macinfo
= sections
.macinfo
;
12368 dwo_file
->sections
.macro
= sections
.macro
;
12369 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
12370 /* The "str" section is global to the entire DWP file. */
12371 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12372 /* The info or types section is assigned below to dwo_unit,
12373 there's no need to record it in dwo_file.
12374 Also, we can't simply record type sections in dwo_file because
12375 we record a pointer into the vector in dwo_unit. As we collect more
12376 types we'll grow the vector and eventually have to reallocate space
12377 for it, invalidating all copies of pointers into the previous
12379 *dwo_file_slot
= dwo_file
;
12383 if (dwarf_read_debug
)
12385 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12386 virtual_dwo_name
.c_str ());
12388 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12391 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12392 dwo_unit
->dwo_file
= dwo_file
;
12393 dwo_unit
->signature
= signature
;
12394 dwo_unit
->section
=
12395 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12396 *dwo_unit
->section
= sections
.info_or_types
;
12397 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12402 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
12403 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
12404 piece within that section used by a TU/CU, return a virtual section
12405 of just that piece. */
12407 static struct dwarf2_section_info
12408 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12409 struct dwarf2_section_info
*section
,
12410 bfd_size_type offset
, bfd_size_type size
)
12412 struct dwarf2_section_info result
;
12415 gdb_assert (section
!= NULL
);
12416 gdb_assert (!section
->is_virtual
);
12418 memset (&result
, 0, sizeof (result
));
12419 result
.s
.containing_section
= section
;
12420 result
.is_virtual
= 1;
12425 sectp
= get_section_bfd_section (section
);
12427 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
12428 bounds of the real section. This is a pretty-rare event, so just
12429 flag an error (easier) instead of a warning and trying to cope. */
12431 || offset
+ size
> bfd_get_section_size (sectp
))
12433 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
12434 " in section %s [in module %s]"),
12435 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
12436 objfile_name (dwarf2_per_objfile
->objfile
));
12439 result
.virtual_offset
= offset
;
12440 result
.size
= size
;
12444 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12445 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12446 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12447 This is for DWP version 2 files. */
12449 static struct dwo_unit
*
12450 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12451 struct dwp_file
*dwp_file
,
12452 uint32_t unit_index
,
12453 const char *comp_dir
,
12454 ULONGEST signature
, int is_debug_types
)
12456 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12457 const struct dwp_hash_table
*dwp_htab
=
12458 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12459 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12460 const char *kind
= is_debug_types
? "TU" : "CU";
12461 struct dwo_file
*dwo_file
;
12462 struct dwo_unit
*dwo_unit
;
12463 struct virtual_v2_dwo_sections sections
;
12464 void **dwo_file_slot
;
12467 gdb_assert (dwp_file
->version
== 2);
12469 if (dwarf_read_debug
)
12471 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
12473 pulongest (unit_index
), hex_string (signature
),
12477 /* Fetch the section offsets of this DWO unit. */
12479 memset (§ions
, 0, sizeof (sections
));
12481 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12483 uint32_t offset
= read_4_bytes (dbfd
,
12484 dwp_htab
->section_pool
.v2
.offsets
12485 + (((unit_index
- 1) * dwp_htab
->nr_columns
12487 * sizeof (uint32_t)));
12488 uint32_t size
= read_4_bytes (dbfd
,
12489 dwp_htab
->section_pool
.v2
.sizes
12490 + (((unit_index
- 1) * dwp_htab
->nr_columns
12492 * sizeof (uint32_t)));
12494 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12497 case DW_SECT_TYPES
:
12498 sections
.info_or_types_offset
= offset
;
12499 sections
.info_or_types_size
= size
;
12501 case DW_SECT_ABBREV
:
12502 sections
.abbrev_offset
= offset
;
12503 sections
.abbrev_size
= size
;
12506 sections
.line_offset
= offset
;
12507 sections
.line_size
= size
;
12510 sections
.loc_offset
= offset
;
12511 sections
.loc_size
= size
;
12513 case DW_SECT_STR_OFFSETS
:
12514 sections
.str_offsets_offset
= offset
;
12515 sections
.str_offsets_size
= size
;
12517 case DW_SECT_MACINFO
:
12518 sections
.macinfo_offset
= offset
;
12519 sections
.macinfo_size
= size
;
12521 case DW_SECT_MACRO
:
12522 sections
.macro_offset
= offset
;
12523 sections
.macro_size
= size
;
12528 /* It's easier for the rest of the code if we fake a struct dwo_file and
12529 have dwo_unit "live" in that. At least for now.
12531 The DWP file can be made up of a random collection of CUs and TUs.
12532 However, for each CU + set of TUs that came from the same original DWO
12533 file, we can combine them back into a virtual DWO file to save space
12534 (fewer struct dwo_file objects to allocate). Remember that for really
12535 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12537 std::string virtual_dwo_name
=
12538 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12539 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12540 (long) (sections
.line_size
? sections
.line_offset
: 0),
12541 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12542 (long) (sections
.str_offsets_size
12543 ? sections
.str_offsets_offset
: 0));
12544 /* Can we use an existing virtual DWO file? */
12545 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12546 virtual_dwo_name
.c_str (),
12548 /* Create one if necessary. */
12549 if (*dwo_file_slot
== NULL
)
12551 if (dwarf_read_debug
)
12553 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12554 virtual_dwo_name
.c_str ());
12556 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12558 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12559 virtual_dwo_name
.c_str (),
12560 virtual_dwo_name
.size ());
12561 dwo_file
->comp_dir
= comp_dir
;
12562 dwo_file
->sections
.abbrev
=
12563 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
12564 sections
.abbrev_offset
, sections
.abbrev_size
);
12565 dwo_file
->sections
.line
=
12566 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
12567 sections
.line_offset
, sections
.line_size
);
12568 dwo_file
->sections
.loc
=
12569 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12570 sections
.loc_offset
, sections
.loc_size
);
12571 dwo_file
->sections
.macinfo
=
12572 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12573 sections
.macinfo_offset
, sections
.macinfo_size
);
12574 dwo_file
->sections
.macro
=
12575 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12576 sections
.macro_offset
, sections
.macro_size
);
12577 dwo_file
->sections
.str_offsets
=
12578 create_dwp_v2_section (dwarf2_per_objfile
,
12579 &dwp_file
->sections
.str_offsets
,
12580 sections
.str_offsets_offset
,
12581 sections
.str_offsets_size
);
12582 /* The "str" section is global to the entire DWP file. */
12583 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12584 /* The info or types section is assigned below to dwo_unit,
12585 there's no need to record it in dwo_file.
12586 Also, we can't simply record type sections in dwo_file because
12587 we record a pointer into the vector in dwo_unit. As we collect more
12588 types we'll grow the vector and eventually have to reallocate space
12589 for it, invalidating all copies of pointers into the previous
12591 *dwo_file_slot
= dwo_file
;
12595 if (dwarf_read_debug
)
12597 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12598 virtual_dwo_name
.c_str ());
12600 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12603 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12604 dwo_unit
->dwo_file
= dwo_file
;
12605 dwo_unit
->signature
= signature
;
12606 dwo_unit
->section
=
12607 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12608 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12610 ? &dwp_file
->sections
.types
12611 : &dwp_file
->sections
.info
,
12612 sections
.info_or_types_offset
,
12613 sections
.info_or_types_size
);
12614 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12619 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12620 Returns NULL if the signature isn't found. */
12622 static struct dwo_unit
*
12623 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12624 struct dwp_file
*dwp_file
, const char *comp_dir
,
12625 ULONGEST signature
, int is_debug_types
)
12627 const struct dwp_hash_table
*dwp_htab
=
12628 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12629 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12630 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12631 uint32_t hash
= signature
& mask
;
12632 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12635 struct dwo_unit find_dwo_cu
;
12637 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12638 find_dwo_cu
.signature
= signature
;
12639 slot
= htab_find_slot (is_debug_types
12640 ? dwp_file
->loaded_tus
12641 : dwp_file
->loaded_cus
,
12642 &find_dwo_cu
, INSERT
);
12645 return (struct dwo_unit
*) *slot
;
12647 /* Use a for loop so that we don't loop forever on bad debug info. */
12648 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12650 ULONGEST signature_in_table
;
12652 signature_in_table
=
12653 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12654 if (signature_in_table
== signature
)
12656 uint32_t unit_index
=
12657 read_4_bytes (dbfd
,
12658 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12660 if (dwp_file
->version
== 1)
12662 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12663 dwp_file
, unit_index
,
12664 comp_dir
, signature
,
12669 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12670 dwp_file
, unit_index
,
12671 comp_dir
, signature
,
12674 return (struct dwo_unit
*) *slot
;
12676 if (signature_in_table
== 0)
12678 hash
= (hash
+ hash2
) & mask
;
12681 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12682 " [in module %s]"),
12686 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12687 Open the file specified by FILE_NAME and hand it off to BFD for
12688 preliminary analysis. Return a newly initialized bfd *, which
12689 includes a canonicalized copy of FILE_NAME.
12690 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12691 SEARCH_CWD is true if the current directory is to be searched.
12692 It will be searched before debug-file-directory.
12693 If successful, the file is added to the bfd include table of the
12694 objfile's bfd (see gdb_bfd_record_inclusion).
12695 If unable to find/open the file, return NULL.
12696 NOTE: This function is derived from symfile_bfd_open. */
12698 static gdb_bfd_ref_ptr
12699 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12700 const char *file_name
, int is_dwp
, int search_cwd
)
12703 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12704 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12705 to debug_file_directory. */
12706 const char *search_path
;
12707 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12709 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12712 if (*debug_file_directory
!= '\0')
12714 search_path_holder
.reset (concat (".", dirname_separator_string
,
12715 debug_file_directory
,
12717 search_path
= search_path_holder
.get ();
12723 search_path
= debug_file_directory
;
12725 openp_flags flags
= OPF_RETURN_REALPATH
;
12727 flags
|= OPF_SEARCH_IN_PATH
;
12729 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12730 desc
= openp (search_path
, flags
, file_name
,
12731 O_RDONLY
| O_BINARY
, &absolute_name
);
12735 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12737 if (sym_bfd
== NULL
)
12739 bfd_set_cacheable (sym_bfd
.get (), 1);
12741 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12744 /* Success. Record the bfd as having been included by the objfile's bfd.
12745 This is important because things like demangled_names_hash lives in the
12746 objfile's per_bfd space and may have references to things like symbol
12747 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12748 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12753 /* Try to open DWO file FILE_NAME.
12754 COMP_DIR is the DW_AT_comp_dir attribute.
12755 The result is the bfd handle of the file.
12756 If there is a problem finding or opening the file, return NULL.
12757 Upon success, the canonicalized path of the file is stored in the bfd,
12758 same as symfile_bfd_open. */
12760 static gdb_bfd_ref_ptr
12761 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12762 const char *file_name
, const char *comp_dir
)
12764 if (IS_ABSOLUTE_PATH (file_name
))
12765 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12766 0 /*is_dwp*/, 0 /*search_cwd*/);
12768 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12770 if (comp_dir
!= NULL
)
12772 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
12773 file_name
, (char *) NULL
);
12775 /* NOTE: If comp_dir is a relative path, this will also try the
12776 search path, which seems useful. */
12777 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12780 1 /*search_cwd*/));
12781 xfree (path_to_try
);
12786 /* That didn't work, try debug-file-directory, which, despite its name,
12787 is a list of paths. */
12789 if (*debug_file_directory
== '\0')
12792 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12793 0 /*is_dwp*/, 1 /*search_cwd*/);
12796 /* This function is mapped across the sections and remembers the offset and
12797 size of each of the DWO debugging sections we are interested in. */
12800 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12802 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12803 const struct dwop_section_names
*names
= &dwop_section_names
;
12805 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12807 dwo_sections
->abbrev
.s
.section
= sectp
;
12808 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12810 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12812 dwo_sections
->info
.s
.section
= sectp
;
12813 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
12815 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12817 dwo_sections
->line
.s
.section
= sectp
;
12818 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
12820 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12822 dwo_sections
->loc
.s
.section
= sectp
;
12823 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
12825 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12827 dwo_sections
->macinfo
.s
.section
= sectp
;
12828 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12830 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12832 dwo_sections
->macro
.s
.section
= sectp
;
12833 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
12835 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12837 dwo_sections
->str
.s
.section
= sectp
;
12838 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
12840 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12842 dwo_sections
->str_offsets
.s
.section
= sectp
;
12843 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12845 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12847 struct dwarf2_section_info type_section
;
12849 memset (&type_section
, 0, sizeof (type_section
));
12850 type_section
.s
.section
= sectp
;
12851 type_section
.size
= bfd_get_section_size (sectp
);
12852 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
12857 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12858 by PER_CU. This is for the non-DWP case.
12859 The result is NULL if DWO_NAME can't be found. */
12861 static struct dwo_file
*
12862 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12863 const char *dwo_name
, const char *comp_dir
)
12865 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12866 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12868 gdb_bfd_ref_ptr
dbfd (open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
));
12871 if (dwarf_read_debug
)
12872 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12876 /* We use a unique pointer here, despite the obstack allocation,
12877 because a dwo_file needs some cleanup if it is abandoned. */
12878 dwo_file_up
dwo_file (OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
12880 dwo_file
->dwo_name
= dwo_name
;
12881 dwo_file
->comp_dir
= comp_dir
;
12882 dwo_file
->dbfd
= dbfd
.release ();
12884 bfd_map_over_sections (dwo_file
->dbfd
, dwarf2_locate_dwo_sections
,
12885 &dwo_file
->sections
);
12887 create_cus_hash_table (dwarf2_per_objfile
, *dwo_file
, dwo_file
->sections
.info
,
12890 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
12891 dwo_file
->sections
.types
, dwo_file
->tus
);
12893 if (dwarf_read_debug
)
12894 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
12896 return dwo_file
.release ();
12899 /* This function is mapped across the sections and remembers the offset and
12900 size of each of the DWP debugging sections common to version 1 and 2 that
12901 we are interested in. */
12904 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12905 void *dwp_file_ptr
)
12907 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12908 const struct dwop_section_names
*names
= &dwop_section_names
;
12909 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12911 /* Record the ELF section number for later lookup: this is what the
12912 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12913 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12914 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12916 /* Look for specific sections that we need. */
12917 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12919 dwp_file
->sections
.str
.s
.section
= sectp
;
12920 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
12922 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12924 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12925 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
12927 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12929 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12930 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
12934 /* This function is mapped across the sections and remembers the offset and
12935 size of each of the DWP version 2 debugging sections that we are interested
12936 in. This is split into a separate function because we don't know if we
12937 have version 1 or 2 until we parse the cu_index/tu_index sections. */
12940 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12942 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12943 const struct dwop_section_names
*names
= &dwop_section_names
;
12944 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12946 /* Record the ELF section number for later lookup: this is what the
12947 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12948 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12949 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12951 /* Look for specific sections that we need. */
12952 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12954 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12955 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
12957 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12959 dwp_file
->sections
.info
.s
.section
= sectp
;
12960 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
12962 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12964 dwp_file
->sections
.line
.s
.section
= sectp
;
12965 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
12967 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12969 dwp_file
->sections
.loc
.s
.section
= sectp
;
12970 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
12972 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12974 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
12975 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
12977 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12979 dwp_file
->sections
.macro
.s
.section
= sectp
;
12980 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
12982 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12984 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
12985 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
12987 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12989 dwp_file
->sections
.types
.s
.section
= sectp
;
12990 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
12994 /* Hash function for dwp_file loaded CUs/TUs. */
12997 hash_dwp_loaded_cutus (const void *item
)
12999 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
13001 /* This drops the top 32 bits of the signature, but is ok for a hash. */
13002 return dwo_unit
->signature
;
13005 /* Equality function for dwp_file loaded CUs/TUs. */
13008 eq_dwp_loaded_cutus (const void *a
, const void *b
)
13010 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
13011 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
13013 return dua
->signature
== dub
->signature
;
13016 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
13019 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
13021 return htab_create_alloc_ex (3,
13022 hash_dwp_loaded_cutus
,
13023 eq_dwp_loaded_cutus
,
13025 &objfile
->objfile_obstack
,
13026 hashtab_obstack_allocate
,
13027 dummy_obstack_deallocate
);
13030 /* Try to open DWP file FILE_NAME.
13031 The result is the bfd handle of the file.
13032 If there is a problem finding or opening the file, return NULL.
13033 Upon success, the canonicalized path of the file is stored in the bfd,
13034 same as symfile_bfd_open. */
13036 static gdb_bfd_ref_ptr
13037 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
13038 const char *file_name
)
13040 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
13042 1 /*search_cwd*/));
13046 /* Work around upstream bug 15652.
13047 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
13048 [Whether that's a "bug" is debatable, but it is getting in our way.]
13049 We have no real idea where the dwp file is, because gdb's realpath-ing
13050 of the executable's path may have discarded the needed info.
13051 [IWBN if the dwp file name was recorded in the executable, akin to
13052 .gnu_debuglink, but that doesn't exist yet.]
13053 Strip the directory from FILE_NAME and search again. */
13054 if (*debug_file_directory
!= '\0')
13056 /* Don't implicitly search the current directory here.
13057 If the user wants to search "." to handle this case,
13058 it must be added to debug-file-directory. */
13059 return try_open_dwop_file (dwarf2_per_objfile
,
13060 lbasename (file_name
), 1 /*is_dwp*/,
13067 /* Initialize the use of the DWP file for the current objfile.
13068 By convention the name of the DWP file is ${objfile}.dwp.
13069 The result is NULL if it can't be found. */
13071 static std::unique_ptr
<struct dwp_file
>
13072 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13074 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13076 /* Try to find first .dwp for the binary file before any symbolic links
13079 /* If the objfile is a debug file, find the name of the real binary
13080 file and get the name of dwp file from there. */
13081 std::string dwp_name
;
13082 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
13084 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
13085 const char *backlink_basename
= lbasename (backlink
->original_name
);
13087 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
13090 dwp_name
= objfile
->original_name
;
13092 dwp_name
+= ".dwp";
13094 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
13096 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
13098 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
13099 dwp_name
= objfile_name (objfile
);
13100 dwp_name
+= ".dwp";
13101 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
13106 if (dwarf_read_debug
)
13107 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
13108 return std::unique_ptr
<dwp_file
> ();
13111 const char *name
= bfd_get_filename (dbfd
.get ());
13112 std::unique_ptr
<struct dwp_file
> dwp_file
13113 (new struct dwp_file (name
, std::move (dbfd
)));
13115 /* +1: section 0 is unused */
13116 dwp_file
->num_sections
= bfd_count_sections (dwp_file
->dbfd
) + 1;
13117 dwp_file
->elf_sections
=
13118 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
13119 dwp_file
->num_sections
, asection
*);
13121 bfd_map_over_sections (dwp_file
->dbfd
.get (),
13122 dwarf2_locate_common_dwp_sections
,
13125 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
13128 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
13131 /* The DWP file version is stored in the hash table. Oh well. */
13132 if (dwp_file
->cus
&& dwp_file
->tus
13133 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
13135 /* Technically speaking, we should try to limp along, but this is
13136 pretty bizarre. We use pulongest here because that's the established
13137 portability solution (e.g, we cannot use %u for uint32_t). */
13138 error (_("Dwarf Error: DWP file CU version %s doesn't match"
13139 " TU version %s [in DWP file %s]"),
13140 pulongest (dwp_file
->cus
->version
),
13141 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
13145 dwp_file
->version
= dwp_file
->cus
->version
;
13146 else if (dwp_file
->tus
)
13147 dwp_file
->version
= dwp_file
->tus
->version
;
13149 dwp_file
->version
= 2;
13151 if (dwp_file
->version
== 2)
13152 bfd_map_over_sections (dwp_file
->dbfd
.get (),
13153 dwarf2_locate_v2_dwp_sections
,
13156 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
13157 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
13159 if (dwarf_read_debug
)
13161 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
13162 fprintf_unfiltered (gdb_stdlog
,
13163 " %s CUs, %s TUs\n",
13164 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
13165 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
13171 /* Wrapper around open_and_init_dwp_file, only open it once. */
13173 static struct dwp_file
*
13174 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13176 if (! dwarf2_per_objfile
->dwp_checked
)
13178 dwarf2_per_objfile
->dwp_file
13179 = open_and_init_dwp_file (dwarf2_per_objfile
);
13180 dwarf2_per_objfile
->dwp_checked
= 1;
13182 return dwarf2_per_objfile
->dwp_file
.get ();
13185 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
13186 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
13187 or in the DWP file for the objfile, referenced by THIS_UNIT.
13188 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
13189 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
13191 This is called, for example, when wanting to read a variable with a
13192 complex location. Therefore we don't want to do file i/o for every call.
13193 Therefore we don't want to look for a DWO file on every call.
13194 Therefore we first see if we've already seen SIGNATURE in a DWP file,
13195 then we check if we've already seen DWO_NAME, and only THEN do we check
13198 The result is a pointer to the dwo_unit object or NULL if we didn't find it
13199 (dwo_id mismatch or couldn't find the DWO/DWP file). */
13201 static struct dwo_unit
*
13202 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
13203 const char *dwo_name
, const char *comp_dir
,
13204 ULONGEST signature
, int is_debug_types
)
13206 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
13207 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13208 const char *kind
= is_debug_types
? "TU" : "CU";
13209 void **dwo_file_slot
;
13210 struct dwo_file
*dwo_file
;
13211 struct dwp_file
*dwp_file
;
13213 /* First see if there's a DWP file.
13214 If we have a DWP file but didn't find the DWO inside it, don't
13215 look for the original DWO file. It makes gdb behave differently
13216 depending on whether one is debugging in the build tree. */
13218 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
13219 if (dwp_file
!= NULL
)
13221 const struct dwp_hash_table
*dwp_htab
=
13222 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
13224 if (dwp_htab
!= NULL
)
13226 struct dwo_unit
*dwo_cutu
=
13227 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
13228 signature
, is_debug_types
);
13230 if (dwo_cutu
!= NULL
)
13232 if (dwarf_read_debug
)
13234 fprintf_unfiltered (gdb_stdlog
,
13235 "Virtual DWO %s %s found: @%s\n",
13236 kind
, hex_string (signature
),
13237 host_address_to_string (dwo_cutu
));
13245 /* No DWP file, look for the DWO file. */
13247 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
13248 dwo_name
, comp_dir
);
13249 if (*dwo_file_slot
== NULL
)
13251 /* Read in the file and build a table of the CUs/TUs it contains. */
13252 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
13254 /* NOTE: This will be NULL if unable to open the file. */
13255 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
13257 if (dwo_file
!= NULL
)
13259 struct dwo_unit
*dwo_cutu
= NULL
;
13261 if (is_debug_types
&& dwo_file
->tus
)
13263 struct dwo_unit find_dwo_cutu
;
13265 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13266 find_dwo_cutu
.signature
= signature
;
13268 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
13270 else if (!is_debug_types
&& dwo_file
->cus
)
13272 struct dwo_unit find_dwo_cutu
;
13274 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13275 find_dwo_cutu
.signature
= signature
;
13276 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
13280 if (dwo_cutu
!= NULL
)
13282 if (dwarf_read_debug
)
13284 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
13285 kind
, dwo_name
, hex_string (signature
),
13286 host_address_to_string (dwo_cutu
));
13293 /* We didn't find it. This could mean a dwo_id mismatch, or
13294 someone deleted the DWO/DWP file, or the search path isn't set up
13295 correctly to find the file. */
13297 if (dwarf_read_debug
)
13299 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
13300 kind
, dwo_name
, hex_string (signature
));
13303 /* This is a warning and not a complaint because it can be caused by
13304 pilot error (e.g., user accidentally deleting the DWO). */
13306 /* Print the name of the DWP file if we looked there, helps the user
13307 better diagnose the problem. */
13308 std::string dwp_text
;
13310 if (dwp_file
!= NULL
)
13311 dwp_text
= string_printf (" [in DWP file %s]",
13312 lbasename (dwp_file
->name
));
13314 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
13315 " [in module %s]"),
13316 kind
, dwo_name
, hex_string (signature
),
13318 this_unit
->is_debug_types
? "TU" : "CU",
13319 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
13324 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
13325 See lookup_dwo_cutu_unit for details. */
13327 static struct dwo_unit
*
13328 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
13329 const char *dwo_name
, const char *comp_dir
,
13330 ULONGEST signature
)
13332 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
13335 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
13336 See lookup_dwo_cutu_unit for details. */
13338 static struct dwo_unit
*
13339 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
13340 const char *dwo_name
, const char *comp_dir
)
13342 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
13345 /* Traversal function for queue_and_load_all_dwo_tus. */
13348 queue_and_load_dwo_tu (void **slot
, void *info
)
13350 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
13351 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
13352 ULONGEST signature
= dwo_unit
->signature
;
13353 struct signatured_type
*sig_type
=
13354 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
13356 if (sig_type
!= NULL
)
13358 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
13360 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
13361 a real dependency of PER_CU on SIG_TYPE. That is detected later
13362 while processing PER_CU. */
13363 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
13364 load_full_type_unit (sig_cu
);
13365 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
13371 /* Queue all TUs contained in the DWO of PER_CU to be read in.
13372 The DWO may have the only definition of the type, though it may not be
13373 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
13374 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
13377 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
13379 struct dwo_unit
*dwo_unit
;
13380 struct dwo_file
*dwo_file
;
13382 gdb_assert (!per_cu
->is_debug_types
);
13383 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
13384 gdb_assert (per_cu
->cu
!= NULL
);
13386 dwo_unit
= per_cu
->cu
->dwo_unit
;
13387 gdb_assert (dwo_unit
!= NULL
);
13389 dwo_file
= dwo_unit
->dwo_file
;
13390 if (dwo_file
->tus
!= NULL
)
13391 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
13394 /* Free all resources associated with DWO_FILE.
13395 Close the DWO file and munmap the sections. */
13398 free_dwo_file (struct dwo_file
*dwo_file
)
13400 /* Note: dbfd is NULL for virtual DWO files. */
13401 gdb_bfd_unref (dwo_file
->dbfd
);
13403 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
13406 /* Traversal function for free_dwo_files. */
13409 free_dwo_file_from_slot (void **slot
, void *info
)
13411 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
13413 free_dwo_file (dwo_file
);
13418 /* Free all resources associated with DWO_FILES. */
13421 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
13423 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
13426 /* Read in various DIEs. */
13428 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
13429 Inherit only the children of the DW_AT_abstract_origin DIE not being
13430 already referenced by DW_AT_abstract_origin from the children of the
13434 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
13436 struct die_info
*child_die
;
13437 sect_offset
*offsetp
;
13438 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
13439 struct die_info
*origin_die
;
13440 /* Iterator of the ORIGIN_DIE children. */
13441 struct die_info
*origin_child_die
;
13442 struct attribute
*attr
;
13443 struct dwarf2_cu
*origin_cu
;
13444 struct pending
**origin_previous_list_in_scope
;
13446 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13450 /* Note that following die references may follow to a die in a
13454 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
13456 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
13458 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
13459 origin_cu
->list_in_scope
= cu
->list_in_scope
;
13461 if (die
->tag
!= origin_die
->tag
13462 && !(die
->tag
== DW_TAG_inlined_subroutine
13463 && origin_die
->tag
== DW_TAG_subprogram
))
13464 complaint (_("DIE %s and its abstract origin %s have different tags"),
13465 sect_offset_str (die
->sect_off
),
13466 sect_offset_str (origin_die
->sect_off
));
13468 std::vector
<sect_offset
> offsets
;
13470 for (child_die
= die
->child
;
13471 child_die
&& child_die
->tag
;
13472 child_die
= sibling_die (child_die
))
13474 struct die_info
*child_origin_die
;
13475 struct dwarf2_cu
*child_origin_cu
;
13477 /* We are trying to process concrete instance entries:
13478 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
13479 it's not relevant to our analysis here. i.e. detecting DIEs that are
13480 present in the abstract instance but not referenced in the concrete
13482 if (child_die
->tag
== DW_TAG_call_site
13483 || child_die
->tag
== DW_TAG_GNU_call_site
)
13486 /* For each CHILD_DIE, find the corresponding child of
13487 ORIGIN_DIE. If there is more than one layer of
13488 DW_AT_abstract_origin, follow them all; there shouldn't be,
13489 but GCC versions at least through 4.4 generate this (GCC PR
13491 child_origin_die
= child_die
;
13492 child_origin_cu
= cu
;
13495 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
13499 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
13503 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
13504 counterpart may exist. */
13505 if (child_origin_die
!= child_die
)
13507 if (child_die
->tag
!= child_origin_die
->tag
13508 && !(child_die
->tag
== DW_TAG_inlined_subroutine
13509 && child_origin_die
->tag
== DW_TAG_subprogram
))
13510 complaint (_("Child DIE %s and its abstract origin %s have "
13512 sect_offset_str (child_die
->sect_off
),
13513 sect_offset_str (child_origin_die
->sect_off
));
13514 if (child_origin_die
->parent
!= origin_die
)
13515 complaint (_("Child DIE %s and its abstract origin %s have "
13516 "different parents"),
13517 sect_offset_str (child_die
->sect_off
),
13518 sect_offset_str (child_origin_die
->sect_off
));
13520 offsets
.push_back (child_origin_die
->sect_off
);
13523 std::sort (offsets
.begin (), offsets
.end ());
13524 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
13525 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
13526 if (offsetp
[-1] == *offsetp
)
13527 complaint (_("Multiple children of DIE %s refer "
13528 "to DIE %s as their abstract origin"),
13529 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
13531 offsetp
= offsets
.data ();
13532 origin_child_die
= origin_die
->child
;
13533 while (origin_child_die
&& origin_child_die
->tag
)
13535 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13536 while (offsetp
< offsets_end
13537 && *offsetp
< origin_child_die
->sect_off
)
13539 if (offsetp
>= offsets_end
13540 || *offsetp
> origin_child_die
->sect_off
)
13542 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13543 Check whether we're already processing ORIGIN_CHILD_DIE.
13544 This can happen with mutually referenced abstract_origins.
13546 if (!origin_child_die
->in_process
)
13547 process_die (origin_child_die
, origin_cu
);
13549 origin_child_die
= sibling_die (origin_child_die
);
13551 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13555 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13557 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13558 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13559 struct context_stack
*newobj
;
13562 struct die_info
*child_die
;
13563 struct attribute
*attr
, *call_line
, *call_file
;
13565 CORE_ADDR baseaddr
;
13566 struct block
*block
;
13567 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13568 std::vector
<struct symbol
*> template_args
;
13569 struct template_symbol
*templ_func
= NULL
;
13573 /* If we do not have call site information, we can't show the
13574 caller of this inlined function. That's too confusing, so
13575 only use the scope for local variables. */
13576 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13577 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13578 if (call_line
== NULL
|| call_file
== NULL
)
13580 read_lexical_block_scope (die
, cu
);
13585 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13587 name
= dwarf2_name (die
, cu
);
13589 /* Ignore functions with missing or empty names. These are actually
13590 illegal according to the DWARF standard. */
13593 complaint (_("missing name for subprogram DIE at %s"),
13594 sect_offset_str (die
->sect_off
));
13598 /* Ignore functions with missing or invalid low and high pc attributes. */
13599 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13600 <= PC_BOUNDS_INVALID
)
13602 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13603 if (!attr
|| !DW_UNSND (attr
))
13604 complaint (_("cannot get low and high bounds "
13605 "for subprogram DIE at %s"),
13606 sect_offset_str (die
->sect_off
));
13610 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13611 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13613 /* If we have any template arguments, then we must allocate a
13614 different sort of symbol. */
13615 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
13617 if (child_die
->tag
== DW_TAG_template_type_param
13618 || child_die
->tag
== DW_TAG_template_value_param
)
13620 templ_func
= allocate_template_symbol (objfile
);
13621 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13626 newobj
= push_context (0, lowpc
);
13627 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13628 (struct symbol
*) templ_func
);
13630 /* If there is a location expression for DW_AT_frame_base, record
13632 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13634 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13636 /* If there is a location for the static link, record it. */
13637 newobj
->static_link
= NULL
;
13638 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13641 newobj
->static_link
13642 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13643 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
13646 cu
->list_in_scope
= &local_symbols
;
13648 if (die
->child
!= NULL
)
13650 child_die
= die
->child
;
13651 while (child_die
&& child_die
->tag
)
13653 if (child_die
->tag
== DW_TAG_template_type_param
13654 || child_die
->tag
== DW_TAG_template_value_param
)
13656 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13659 template_args
.push_back (arg
);
13662 process_die (child_die
, cu
);
13663 child_die
= sibling_die (child_die
);
13667 inherit_abstract_dies (die
, cu
);
13669 /* If we have a DW_AT_specification, we might need to import using
13670 directives from the context of the specification DIE. See the
13671 comment in determine_prefix. */
13672 if (cu
->language
== language_cplus
13673 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13675 struct dwarf2_cu
*spec_cu
= cu
;
13676 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13680 child_die
= spec_die
->child
;
13681 while (child_die
&& child_die
->tag
)
13683 if (child_die
->tag
== DW_TAG_imported_module
)
13684 process_die (child_die
, spec_cu
);
13685 child_die
= sibling_die (child_die
);
13688 /* In some cases, GCC generates specification DIEs that
13689 themselves contain DW_AT_specification attributes. */
13690 spec_die
= die_specification (spec_die
, &spec_cu
);
13694 newobj
= pop_context ();
13695 /* Make a block for the local symbols within. */
13696 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
13697 newobj
->static_link
, lowpc
, highpc
);
13699 /* For C++, set the block's scope. */
13700 if ((cu
->language
== language_cplus
13701 || cu
->language
== language_fortran
13702 || cu
->language
== language_d
13703 || cu
->language
== language_rust
)
13704 && cu
->processing_has_namespace_info
)
13705 block_set_scope (block
, determine_prefix (die
, cu
),
13706 &objfile
->objfile_obstack
);
13708 /* If we have address ranges, record them. */
13709 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13711 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
13713 /* Attach template arguments to function. */
13714 if (!template_args
.empty ())
13716 gdb_assert (templ_func
!= NULL
);
13718 templ_func
->n_template_arguments
= template_args
.size ();
13719 templ_func
->template_arguments
13720 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13721 templ_func
->n_template_arguments
);
13722 memcpy (templ_func
->template_arguments
,
13723 template_args
.data (),
13724 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13727 /* In C++, we can have functions nested inside functions (e.g., when
13728 a function declares a class that has methods). This means that
13729 when we finish processing a function scope, we may need to go
13730 back to building a containing block's symbol lists. */
13731 local_symbols
= newobj
->locals
;
13732 local_using_directives
= newobj
->local_using_directives
;
13734 /* If we've finished processing a top-level function, subsequent
13735 symbols go in the file symbol list. */
13736 if (outermost_context_p ())
13737 cu
->list_in_scope
= &file_symbols
;
13740 /* Process all the DIES contained within a lexical block scope. Start
13741 a new scope, process the dies, and then close the scope. */
13744 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13746 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13747 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13748 struct context_stack
*newobj
;
13749 CORE_ADDR lowpc
, highpc
;
13750 struct die_info
*child_die
;
13751 CORE_ADDR baseaddr
;
13753 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13755 /* Ignore blocks with missing or invalid low and high pc attributes. */
13756 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13757 as multiple lexical blocks? Handling children in a sane way would
13758 be nasty. Might be easier to properly extend generic blocks to
13759 describe ranges. */
13760 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13762 case PC_BOUNDS_NOT_PRESENT
:
13763 /* DW_TAG_lexical_block has no attributes, process its children as if
13764 there was no wrapping by that DW_TAG_lexical_block.
13765 GCC does no longer produces such DWARF since GCC r224161. */
13766 for (child_die
= die
->child
;
13767 child_die
!= NULL
&& child_die
->tag
;
13768 child_die
= sibling_die (child_die
))
13769 process_die (child_die
, cu
);
13771 case PC_BOUNDS_INVALID
:
13774 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13775 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13777 push_context (0, lowpc
);
13778 if (die
->child
!= NULL
)
13780 child_die
= die
->child
;
13781 while (child_die
&& child_die
->tag
)
13783 process_die (child_die
, cu
);
13784 child_die
= sibling_die (child_die
);
13787 inherit_abstract_dies (die
, cu
);
13788 newobj
= pop_context ();
13790 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
13792 struct block
*block
13793 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
13794 newobj
->start_addr
, highpc
);
13796 /* Note that recording ranges after traversing children, as we
13797 do here, means that recording a parent's ranges entails
13798 walking across all its children's ranges as they appear in
13799 the address map, which is quadratic behavior.
13801 It would be nicer to record the parent's ranges before
13802 traversing its children, simply overriding whatever you find
13803 there. But since we don't even decide whether to create a
13804 block until after we've traversed its children, that's hard
13806 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13808 local_symbols
= newobj
->locals
;
13809 local_using_directives
= newobj
->local_using_directives
;
13812 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13815 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13817 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13818 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13819 CORE_ADDR pc
, baseaddr
;
13820 struct attribute
*attr
;
13821 struct call_site
*call_site
, call_site_local
;
13824 struct die_info
*child_die
;
13826 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13828 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13831 /* This was a pre-DWARF-5 GNU extension alias
13832 for DW_AT_call_return_pc. */
13833 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13837 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13838 "DIE %s [in module %s]"),
13839 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13842 pc
= attr_value_as_address (attr
) + baseaddr
;
13843 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13845 if (cu
->call_site_htab
== NULL
)
13846 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13847 NULL
, &objfile
->objfile_obstack
,
13848 hashtab_obstack_allocate
, NULL
);
13849 call_site_local
.pc
= pc
;
13850 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13853 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13854 "DIE %s [in module %s]"),
13855 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13856 objfile_name (objfile
));
13860 /* Count parameters at the caller. */
13863 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13864 child_die
= sibling_die (child_die
))
13866 if (child_die
->tag
!= DW_TAG_call_site_parameter
13867 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13869 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
13870 "DW_TAG_call_site child DIE %s [in module %s]"),
13871 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13872 objfile_name (objfile
));
13880 = ((struct call_site
*)
13881 obstack_alloc (&objfile
->objfile_obstack
,
13882 sizeof (*call_site
)
13883 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13885 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13886 call_site
->pc
= pc
;
13888 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13889 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13891 struct die_info
*func_die
;
13893 /* Skip also over DW_TAG_inlined_subroutine. */
13894 for (func_die
= die
->parent
;
13895 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13896 && func_die
->tag
!= DW_TAG_subroutine_type
;
13897 func_die
= func_die
->parent
);
13899 /* DW_AT_call_all_calls is a superset
13900 of DW_AT_call_all_tail_calls. */
13902 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13903 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13904 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13905 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13907 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13908 not complete. But keep CALL_SITE for look ups via call_site_htab,
13909 both the initial caller containing the real return address PC and
13910 the final callee containing the current PC of a chain of tail
13911 calls do not need to have the tail call list complete. But any
13912 function candidate for a virtual tail call frame searched via
13913 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13914 determined unambiguously. */
13918 struct type
*func_type
= NULL
;
13921 func_type
= get_die_type (func_die
, cu
);
13922 if (func_type
!= NULL
)
13924 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
13926 /* Enlist this call site to the function. */
13927 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13928 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13931 complaint (_("Cannot find function owning DW_TAG_call_site "
13932 "DIE %s [in module %s]"),
13933 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13937 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13939 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13941 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13944 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13945 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13947 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
13948 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
13949 /* Keep NULL DWARF_BLOCK. */;
13950 else if (attr_form_is_block (attr
))
13952 struct dwarf2_locexpr_baton
*dlbaton
;
13954 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13955 dlbaton
->data
= DW_BLOCK (attr
)->data
;
13956 dlbaton
->size
= DW_BLOCK (attr
)->size
;
13957 dlbaton
->per_cu
= cu
->per_cu
;
13959 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
13961 else if (attr_form_is_ref (attr
))
13963 struct dwarf2_cu
*target_cu
= cu
;
13964 struct die_info
*target_die
;
13966 target_die
= follow_die_ref (die
, attr
, &target_cu
);
13967 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
13968 if (die_is_declaration (target_die
, target_cu
))
13970 const char *target_physname
;
13972 /* Prefer the mangled name; otherwise compute the demangled one. */
13973 target_physname
= dw2_linkage_name (target_die
, target_cu
);
13974 if (target_physname
== NULL
)
13975 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
13976 if (target_physname
== NULL
)
13977 complaint (_("DW_AT_call_target target DIE has invalid "
13978 "physname, for referencing DIE %s [in module %s]"),
13979 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13981 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
13987 /* DW_AT_entry_pc should be preferred. */
13988 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
13989 <= PC_BOUNDS_INVALID
)
13990 complaint (_("DW_AT_call_target target DIE has invalid "
13991 "low pc, for referencing DIE %s [in module %s]"),
13992 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13995 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13996 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
14001 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
14002 "block nor reference, for DIE %s [in module %s]"),
14003 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14005 call_site
->per_cu
= cu
->per_cu
;
14007 for (child_die
= die
->child
;
14008 child_die
&& child_die
->tag
;
14009 child_die
= sibling_die (child_die
))
14011 struct call_site_parameter
*parameter
;
14012 struct attribute
*loc
, *origin
;
14014 if (child_die
->tag
!= DW_TAG_call_site_parameter
14015 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14017 /* Already printed the complaint above. */
14021 gdb_assert (call_site
->parameter_count
< nparams
);
14022 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
14024 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
14025 specifies DW_TAG_formal_parameter. Value of the data assumed for the
14026 register is contained in DW_AT_call_value. */
14028 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
14029 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
14030 if (origin
== NULL
)
14032 /* This was a pre-DWARF-5 GNU extension alias
14033 for DW_AT_call_parameter. */
14034 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
14036 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
14038 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
14040 sect_offset sect_off
14041 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
14042 if (!offset_in_cu_p (&cu
->header
, sect_off
))
14044 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
14045 binding can be done only inside one CU. Such referenced DIE
14046 therefore cannot be even moved to DW_TAG_partial_unit. */
14047 complaint (_("DW_AT_call_parameter offset is not in CU for "
14048 "DW_TAG_call_site child DIE %s [in module %s]"),
14049 sect_offset_str (child_die
->sect_off
),
14050 objfile_name (objfile
));
14053 parameter
->u
.param_cu_off
14054 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
14056 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
14058 complaint (_("No DW_FORM_block* DW_AT_location for "
14059 "DW_TAG_call_site child DIE %s [in module %s]"),
14060 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
14065 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
14066 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
14067 if (parameter
->u
.dwarf_reg
!= -1)
14068 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
14069 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
14070 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
14071 ¶meter
->u
.fb_offset
))
14072 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
14075 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
14076 "for DW_FORM_block* DW_AT_location is supported for "
14077 "DW_TAG_call_site child DIE %s "
14079 sect_offset_str (child_die
->sect_off
),
14080 objfile_name (objfile
));
14085 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
14087 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
14088 if (!attr_form_is_block (attr
))
14090 complaint (_("No DW_FORM_block* DW_AT_call_value for "
14091 "DW_TAG_call_site child DIE %s [in module %s]"),
14092 sect_offset_str (child_die
->sect_off
),
14093 objfile_name (objfile
));
14096 parameter
->value
= DW_BLOCK (attr
)->data
;
14097 parameter
->value_size
= DW_BLOCK (attr
)->size
;
14099 /* Parameters are not pre-cleared by memset above. */
14100 parameter
->data_value
= NULL
;
14101 parameter
->data_value_size
= 0;
14102 call_site
->parameter_count
++;
14104 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
14106 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
14109 if (!attr_form_is_block (attr
))
14110 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
14111 "DW_TAG_call_site child DIE %s [in module %s]"),
14112 sect_offset_str (child_die
->sect_off
),
14113 objfile_name (objfile
));
14116 parameter
->data_value
= DW_BLOCK (attr
)->data
;
14117 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
14123 /* Helper function for read_variable. If DIE represents a virtual
14124 table, then return the type of the concrete object that is
14125 associated with the virtual table. Otherwise, return NULL. */
14127 static struct type
*
14128 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14130 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14134 /* Find the type DIE. */
14135 struct die_info
*type_die
= NULL
;
14136 struct dwarf2_cu
*type_cu
= cu
;
14138 if (attr_form_is_ref (attr
))
14139 type_die
= follow_die_ref (die
, attr
, &type_cu
);
14140 if (type_die
== NULL
)
14143 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
14145 return die_containing_type (type_die
, type_cu
);
14148 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
14151 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
14153 struct rust_vtable_symbol
*storage
= NULL
;
14155 if (cu
->language
== language_rust
)
14157 struct type
*containing_type
= rust_containing_type (die
, cu
);
14159 if (containing_type
!= NULL
)
14161 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14163 storage
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
14164 struct rust_vtable_symbol
);
14165 initialize_objfile_symbol (storage
);
14166 storage
->concrete_type
= containing_type
;
14167 storage
->subclass
= SYMBOL_RUST_VTABLE
;
14171 new_symbol (die
, NULL
, cu
, storage
);
14174 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
14175 reading .debug_rnglists.
14176 Callback's type should be:
14177 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14178 Return true if the attributes are present and valid, otherwise,
14181 template <typename Callback
>
14183 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
14184 Callback
&&callback
)
14186 struct dwarf2_per_objfile
*dwarf2_per_objfile
14187 = cu
->per_cu
->dwarf2_per_objfile
;
14188 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14189 bfd
*obfd
= objfile
->obfd
;
14190 /* Base address selection entry. */
14193 const gdb_byte
*buffer
;
14194 CORE_ADDR baseaddr
;
14195 bool overflow
= false;
14197 found_base
= cu
->base_known
;
14198 base
= cu
->base_address
;
14200 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
14201 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
14203 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14207 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
14209 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14213 /* Initialize it due to a false compiler warning. */
14214 CORE_ADDR range_beginning
= 0, range_end
= 0;
14215 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
14216 + dwarf2_per_objfile
->rnglists
.size
);
14217 unsigned int bytes_read
;
14219 if (buffer
== buf_end
)
14224 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
14227 case DW_RLE_end_of_list
:
14229 case DW_RLE_base_address
:
14230 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14235 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14237 buffer
+= bytes_read
;
14239 case DW_RLE_start_length
:
14240 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14245 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14246 buffer
+= bytes_read
;
14247 range_end
= (range_beginning
14248 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
14249 buffer
+= bytes_read
;
14250 if (buffer
> buf_end
)
14256 case DW_RLE_offset_pair
:
14257 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14258 buffer
+= bytes_read
;
14259 if (buffer
> buf_end
)
14264 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14265 buffer
+= bytes_read
;
14266 if (buffer
> buf_end
)
14272 case DW_RLE_start_end
:
14273 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
14278 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14279 buffer
+= bytes_read
;
14280 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14281 buffer
+= bytes_read
;
14284 complaint (_("Invalid .debug_rnglists data (no base address)"));
14287 if (rlet
== DW_RLE_end_of_list
|| overflow
)
14289 if (rlet
== DW_RLE_base_address
)
14294 /* We have no valid base address for the ranges
14296 complaint (_("Invalid .debug_rnglists data (no base address)"));
14300 if (range_beginning
> range_end
)
14302 /* Inverted range entries are invalid. */
14303 complaint (_("Invalid .debug_rnglists data (inverted range)"));
14307 /* Empty range entries have no effect. */
14308 if (range_beginning
== range_end
)
14311 range_beginning
+= base
;
14314 /* A not-uncommon case of bad debug info.
14315 Don't pollute the addrmap with bad data. */
14316 if (range_beginning
+ baseaddr
== 0
14317 && !dwarf2_per_objfile
->has_section_at_zero
)
14319 complaint (_(".debug_rnglists entry has start address of zero"
14320 " [in module %s]"), objfile_name (objfile
));
14324 callback (range_beginning
, range_end
);
14329 complaint (_("Offset %d is not terminated "
14330 "for DW_AT_ranges attribute"),
14338 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
14339 Callback's type should be:
14340 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14341 Return 1 if the attributes are present and valid, otherwise, return 0. */
14343 template <typename Callback
>
14345 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
14346 Callback
&&callback
)
14348 struct dwarf2_per_objfile
*dwarf2_per_objfile
14349 = cu
->per_cu
->dwarf2_per_objfile
;
14350 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14351 struct comp_unit_head
*cu_header
= &cu
->header
;
14352 bfd
*obfd
= objfile
->obfd
;
14353 unsigned int addr_size
= cu_header
->addr_size
;
14354 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14355 /* Base address selection entry. */
14358 unsigned int dummy
;
14359 const gdb_byte
*buffer
;
14360 CORE_ADDR baseaddr
;
14362 if (cu_header
->version
>= 5)
14363 return dwarf2_rnglists_process (offset
, cu
, callback
);
14365 found_base
= cu
->base_known
;
14366 base
= cu
->base_address
;
14368 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
14369 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
14371 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14375 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
14377 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14381 CORE_ADDR range_beginning
, range_end
;
14383 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
14384 buffer
+= addr_size
;
14385 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
14386 buffer
+= addr_size
;
14387 offset
+= 2 * addr_size
;
14389 /* An end of list marker is a pair of zero addresses. */
14390 if (range_beginning
== 0 && range_end
== 0)
14391 /* Found the end of list entry. */
14394 /* Each base address selection entry is a pair of 2 values.
14395 The first is the largest possible address, the second is
14396 the base address. Check for a base address here. */
14397 if ((range_beginning
& mask
) == mask
)
14399 /* If we found the largest possible address, then we already
14400 have the base address in range_end. */
14408 /* We have no valid base address for the ranges
14410 complaint (_("Invalid .debug_ranges data (no base address)"));
14414 if (range_beginning
> range_end
)
14416 /* Inverted range entries are invalid. */
14417 complaint (_("Invalid .debug_ranges data (inverted range)"));
14421 /* Empty range entries have no effect. */
14422 if (range_beginning
== range_end
)
14425 range_beginning
+= base
;
14428 /* A not-uncommon case of bad debug info.
14429 Don't pollute the addrmap with bad data. */
14430 if (range_beginning
+ baseaddr
== 0
14431 && !dwarf2_per_objfile
->has_section_at_zero
)
14433 complaint (_(".debug_ranges entry has start address of zero"
14434 " [in module %s]"), objfile_name (objfile
));
14438 callback (range_beginning
, range_end
);
14444 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
14445 Return 1 if the attributes are present and valid, otherwise, return 0.
14446 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
14449 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
14450 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
14451 struct partial_symtab
*ranges_pst
)
14453 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14454 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14455 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
14456 SECT_OFF_TEXT (objfile
));
14459 CORE_ADDR high
= 0;
14462 retval
= dwarf2_ranges_process (offset
, cu
,
14463 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
14465 if (ranges_pst
!= NULL
)
14470 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
14471 range_beginning
+ baseaddr
);
14472 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
14473 range_end
+ baseaddr
);
14474 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
14478 /* FIXME: This is recording everything as a low-high
14479 segment of consecutive addresses. We should have a
14480 data structure for discontiguous block ranges
14484 low
= range_beginning
;
14490 if (range_beginning
< low
)
14491 low
= range_beginning
;
14492 if (range_end
> high
)
14500 /* If the first entry is an end-of-list marker, the range
14501 describes an empty scope, i.e. no instructions. */
14507 *high_return
= high
;
14511 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14512 definition for the return value. *LOWPC and *HIGHPC are set iff
14513 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14515 static enum pc_bounds_kind
14516 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14517 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14518 struct partial_symtab
*pst
)
14520 struct dwarf2_per_objfile
*dwarf2_per_objfile
14521 = cu
->per_cu
->dwarf2_per_objfile
;
14522 struct attribute
*attr
;
14523 struct attribute
*attr_high
;
14525 CORE_ADDR high
= 0;
14526 enum pc_bounds_kind ret
;
14528 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14531 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14534 low
= attr_value_as_address (attr
);
14535 high
= attr_value_as_address (attr_high
);
14536 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14540 /* Found high w/o low attribute. */
14541 return PC_BOUNDS_INVALID
;
14543 /* Found consecutive range of addresses. */
14544 ret
= PC_BOUNDS_HIGH_LOW
;
14548 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14551 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14552 We take advantage of the fact that DW_AT_ranges does not appear
14553 in DW_TAG_compile_unit of DWO files. */
14554 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14555 unsigned int ranges_offset
= (DW_UNSND (attr
)
14556 + (need_ranges_base
14560 /* Value of the DW_AT_ranges attribute is the offset in the
14561 .debug_ranges section. */
14562 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
14563 return PC_BOUNDS_INVALID
;
14564 /* Found discontinuous range of addresses. */
14565 ret
= PC_BOUNDS_RANGES
;
14568 return PC_BOUNDS_NOT_PRESENT
;
14571 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14573 return PC_BOUNDS_INVALID
;
14575 /* When using the GNU linker, .gnu.linkonce. sections are used to
14576 eliminate duplicate copies of functions and vtables and such.
14577 The linker will arbitrarily choose one and discard the others.
14578 The AT_*_pc values for such functions refer to local labels in
14579 these sections. If the section from that file was discarded, the
14580 labels are not in the output, so the relocs get a value of 0.
14581 If this is a discarded function, mark the pc bounds as invalid,
14582 so that GDB will ignore it. */
14583 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14584 return PC_BOUNDS_INVALID
;
14592 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14593 its low and high PC addresses. Do nothing if these addresses could not
14594 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14595 and HIGHPC to the high address if greater than HIGHPC. */
14598 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14599 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14600 struct dwarf2_cu
*cu
)
14602 CORE_ADDR low
, high
;
14603 struct die_info
*child
= die
->child
;
14605 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14607 *lowpc
= std::min (*lowpc
, low
);
14608 *highpc
= std::max (*highpc
, high
);
14611 /* If the language does not allow nested subprograms (either inside
14612 subprograms or lexical blocks), we're done. */
14613 if (cu
->language
!= language_ada
)
14616 /* Check all the children of the given DIE. If it contains nested
14617 subprograms, then check their pc bounds. Likewise, we need to
14618 check lexical blocks as well, as they may also contain subprogram
14620 while (child
&& child
->tag
)
14622 if (child
->tag
== DW_TAG_subprogram
14623 || child
->tag
== DW_TAG_lexical_block
)
14624 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14625 child
= sibling_die (child
);
14629 /* Get the low and high pc's represented by the scope DIE, and store
14630 them in *LOWPC and *HIGHPC. If the correct values can't be
14631 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14634 get_scope_pc_bounds (struct die_info
*die
,
14635 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14636 struct dwarf2_cu
*cu
)
14638 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14639 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14640 CORE_ADDR current_low
, current_high
;
14642 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14643 >= PC_BOUNDS_RANGES
)
14645 best_low
= current_low
;
14646 best_high
= current_high
;
14650 struct die_info
*child
= die
->child
;
14652 while (child
&& child
->tag
)
14654 switch (child
->tag
) {
14655 case DW_TAG_subprogram
:
14656 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14658 case DW_TAG_namespace
:
14659 case DW_TAG_module
:
14660 /* FIXME: carlton/2004-01-16: Should we do this for
14661 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14662 that current GCC's always emit the DIEs corresponding
14663 to definitions of methods of classes as children of a
14664 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14665 the DIEs giving the declarations, which could be
14666 anywhere). But I don't see any reason why the
14667 standards says that they have to be there. */
14668 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14670 if (current_low
!= ((CORE_ADDR
) -1))
14672 best_low
= std::min (best_low
, current_low
);
14673 best_high
= std::max (best_high
, current_high
);
14681 child
= sibling_die (child
);
14686 *highpc
= best_high
;
14689 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14693 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14694 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14696 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14697 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14698 struct attribute
*attr
;
14699 struct attribute
*attr_high
;
14701 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14704 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14707 CORE_ADDR low
= attr_value_as_address (attr
);
14708 CORE_ADDR high
= attr_value_as_address (attr_high
);
14710 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14713 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14714 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14715 record_block_range (block
, low
, high
- 1);
14719 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14722 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14723 We take advantage of the fact that DW_AT_ranges does not appear
14724 in DW_TAG_compile_unit of DWO files. */
14725 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14727 /* The value of the DW_AT_ranges attribute is the offset of the
14728 address range list in the .debug_ranges section. */
14729 unsigned long offset
= (DW_UNSND (attr
)
14730 + (need_ranges_base
? cu
->ranges_base
: 0));
14732 dwarf2_ranges_process (offset
, cu
,
14733 [&] (CORE_ADDR start
, CORE_ADDR end
)
14737 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14738 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14739 record_block_range (block
, start
, end
- 1);
14744 /* Check whether the producer field indicates either of GCC < 4.6, or the
14745 Intel C/C++ compiler, and cache the result in CU. */
14748 check_producer (struct dwarf2_cu
*cu
)
14752 if (cu
->producer
== NULL
)
14754 /* For unknown compilers expect their behavior is DWARF version
14757 GCC started to support .debug_types sections by -gdwarf-4 since
14758 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14759 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14760 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14761 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14763 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14765 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14766 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14768 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14769 cu
->producer_is_icc_lt_14
= major
< 14;
14772 /* For other non-GCC compilers, expect their behavior is DWARF version
14776 cu
->checked_producer
= 1;
14779 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14780 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14781 during 4.6.0 experimental. */
14784 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14786 if (!cu
->checked_producer
)
14787 check_producer (cu
);
14789 return cu
->producer_is_gxx_lt_4_6
;
14792 /* Return the default accessibility type if it is not overriden by
14793 DW_AT_accessibility. */
14795 static enum dwarf_access_attribute
14796 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14798 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14800 /* The default DWARF 2 accessibility for members is public, the default
14801 accessibility for inheritance is private. */
14803 if (die
->tag
!= DW_TAG_inheritance
)
14804 return DW_ACCESS_public
;
14806 return DW_ACCESS_private
;
14810 /* DWARF 3+ defines the default accessibility a different way. The same
14811 rules apply now for DW_TAG_inheritance as for the members and it only
14812 depends on the container kind. */
14814 if (die
->parent
->tag
== DW_TAG_class_type
)
14815 return DW_ACCESS_private
;
14817 return DW_ACCESS_public
;
14821 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14822 offset. If the attribute was not found return 0, otherwise return
14823 1. If it was found but could not properly be handled, set *OFFSET
14827 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14830 struct attribute
*attr
;
14832 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14837 /* Note that we do not check for a section offset first here.
14838 This is because DW_AT_data_member_location is new in DWARF 4,
14839 so if we see it, we can assume that a constant form is really
14840 a constant and not a section offset. */
14841 if (attr_form_is_constant (attr
))
14842 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
14843 else if (attr_form_is_section_offset (attr
))
14844 dwarf2_complex_location_expr_complaint ();
14845 else if (attr_form_is_block (attr
))
14846 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14848 dwarf2_complex_location_expr_complaint ();
14856 /* Add an aggregate field to the field list. */
14859 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14860 struct dwarf2_cu
*cu
)
14862 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14863 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14864 struct nextfield
*new_field
;
14865 struct attribute
*attr
;
14867 const char *fieldname
= "";
14869 if (die
->tag
== DW_TAG_inheritance
)
14871 fip
->baseclasses
.emplace_back ();
14872 new_field
= &fip
->baseclasses
.back ();
14876 fip
->fields
.emplace_back ();
14877 new_field
= &fip
->fields
.back ();
14882 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14884 new_field
->accessibility
= DW_UNSND (attr
);
14886 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
14887 if (new_field
->accessibility
!= DW_ACCESS_public
)
14888 fip
->non_public_fields
= 1;
14890 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14892 new_field
->virtuality
= DW_UNSND (attr
);
14894 new_field
->virtuality
= DW_VIRTUALITY_none
;
14896 fp
= &new_field
->field
;
14898 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
14902 /* Data member other than a C++ static data member. */
14904 /* Get type of field. */
14905 fp
->type
= die_type (die
, cu
);
14907 SET_FIELD_BITPOS (*fp
, 0);
14909 /* Get bit size of field (zero if none). */
14910 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
14913 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
14917 FIELD_BITSIZE (*fp
) = 0;
14920 /* Get bit offset of field. */
14921 if (handle_data_member_location (die
, cu
, &offset
))
14922 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
14923 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
14926 if (gdbarch_bits_big_endian (gdbarch
))
14928 /* For big endian bits, the DW_AT_bit_offset gives the
14929 additional bit offset from the MSB of the containing
14930 anonymous object to the MSB of the field. We don't
14931 have to do anything special since we don't need to
14932 know the size of the anonymous object. */
14933 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
14937 /* For little endian bits, compute the bit offset to the
14938 MSB of the anonymous object, subtract off the number of
14939 bits from the MSB of the field to the MSB of the
14940 object, and then subtract off the number of bits of
14941 the field itself. The result is the bit offset of
14942 the LSB of the field. */
14943 int anonymous_size
;
14944 int bit_offset
= DW_UNSND (attr
);
14946 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14949 /* The size of the anonymous object containing
14950 the bit field is explicit, so use the
14951 indicated size (in bytes). */
14952 anonymous_size
= DW_UNSND (attr
);
14956 /* The size of the anonymous object containing
14957 the bit field must be inferred from the type
14958 attribute of the data member containing the
14960 anonymous_size
= TYPE_LENGTH (fp
->type
);
14962 SET_FIELD_BITPOS (*fp
,
14963 (FIELD_BITPOS (*fp
)
14964 + anonymous_size
* bits_per_byte
14965 - bit_offset
- FIELD_BITSIZE (*fp
)));
14968 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
14970 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
14971 + dwarf2_get_attr_constant_value (attr
, 0)));
14973 /* Get name of field. */
14974 fieldname
= dwarf2_name (die
, cu
);
14975 if (fieldname
== NULL
)
14978 /* The name is already allocated along with this objfile, so we don't
14979 need to duplicate it for the type. */
14980 fp
->name
= fieldname
;
14982 /* Change accessibility for artificial fields (e.g. virtual table
14983 pointer or virtual base class pointer) to private. */
14984 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
14986 FIELD_ARTIFICIAL (*fp
) = 1;
14987 new_field
->accessibility
= DW_ACCESS_private
;
14988 fip
->non_public_fields
= 1;
14991 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
14993 /* C++ static member. */
14995 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
14996 is a declaration, but all versions of G++ as of this writing
14997 (so through at least 3.2.1) incorrectly generate
14998 DW_TAG_variable tags. */
15000 const char *physname
;
15002 /* Get name of field. */
15003 fieldname
= dwarf2_name (die
, cu
);
15004 if (fieldname
== NULL
)
15007 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15009 /* Only create a symbol if this is an external value.
15010 new_symbol checks this and puts the value in the global symbol
15011 table, which we want. If it is not external, new_symbol
15012 will try to put the value in cu->list_in_scope which is wrong. */
15013 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
15015 /* A static const member, not much different than an enum as far as
15016 we're concerned, except that we can support more types. */
15017 new_symbol (die
, NULL
, cu
);
15020 /* Get physical name. */
15021 physname
= dwarf2_physname (fieldname
, die
, cu
);
15023 /* The name is already allocated along with this objfile, so we don't
15024 need to duplicate it for the type. */
15025 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
15026 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15027 FIELD_NAME (*fp
) = fieldname
;
15029 else if (die
->tag
== DW_TAG_inheritance
)
15033 /* C++ base class field. */
15034 if (handle_data_member_location (die
, cu
, &offset
))
15035 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15036 FIELD_BITSIZE (*fp
) = 0;
15037 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15038 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
15040 else if (die
->tag
== DW_TAG_variant_part
)
15042 /* process_structure_scope will treat this DIE as a union. */
15043 process_structure_scope (die
, cu
);
15045 /* The variant part is relative to the start of the enclosing
15047 SET_FIELD_BITPOS (*fp
, 0);
15048 fp
->type
= get_die_type (die
, cu
);
15049 fp
->artificial
= 1;
15050 fp
->name
= "<<variant>>";
15053 gdb_assert_not_reached ("missing case in dwarf2_add_field");
15056 /* Can the type given by DIE define another type? */
15059 type_can_define_types (const struct die_info
*die
)
15063 case DW_TAG_typedef
:
15064 case DW_TAG_class_type
:
15065 case DW_TAG_structure_type
:
15066 case DW_TAG_union_type
:
15067 case DW_TAG_enumeration_type
:
15075 /* Add a type definition defined in the scope of the FIP's class. */
15078 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
15079 struct dwarf2_cu
*cu
)
15081 struct decl_field fp
;
15082 memset (&fp
, 0, sizeof (fp
));
15084 gdb_assert (type_can_define_types (die
));
15086 /* Get name of field. NULL is okay here, meaning an anonymous type. */
15087 fp
.name
= dwarf2_name (die
, cu
);
15088 fp
.type
= read_type_die (die
, cu
);
15090 /* Save accessibility. */
15091 enum dwarf_access_attribute accessibility
;
15092 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15094 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15096 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15097 switch (accessibility
)
15099 case DW_ACCESS_public
:
15100 /* The assumed value if neither private nor protected. */
15102 case DW_ACCESS_private
:
15105 case DW_ACCESS_protected
:
15106 fp
.is_protected
= 1;
15109 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
15112 if (die
->tag
== DW_TAG_typedef
)
15113 fip
->typedef_field_list
.push_back (fp
);
15115 fip
->nested_types_list
.push_back (fp
);
15118 /* Create the vector of fields, and attach it to the type. */
15121 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
15122 struct dwarf2_cu
*cu
)
15124 int nfields
= fip
->nfields
;
15126 /* Record the field count, allocate space for the array of fields,
15127 and create blank accessibility bitfields if necessary. */
15128 TYPE_NFIELDS (type
) = nfields
;
15129 TYPE_FIELDS (type
) = (struct field
*)
15130 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
15132 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
15134 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15136 TYPE_FIELD_PRIVATE_BITS (type
) =
15137 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15138 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
15140 TYPE_FIELD_PROTECTED_BITS (type
) =
15141 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15142 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
15144 TYPE_FIELD_IGNORE_BITS (type
) =
15145 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15146 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
15149 /* If the type has baseclasses, allocate and clear a bit vector for
15150 TYPE_FIELD_VIRTUAL_BITS. */
15151 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
15153 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
15154 unsigned char *pointer
;
15156 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15157 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
15158 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
15159 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
15160 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
15163 if (TYPE_FLAG_DISCRIMINATED_UNION (type
))
15165 struct discriminant_info
*di
= alloc_discriminant_info (type
, -1, -1);
15167 for (int index
= 0; index
< nfields
; ++index
)
15169 struct nextfield
&field
= fip
->fields
[index
];
15171 if (field
.variant
.is_discriminant
)
15172 di
->discriminant_index
= index
;
15173 else if (field
.variant
.default_branch
)
15174 di
->default_index
= index
;
15176 di
->discriminants
[index
] = field
.variant
.discriminant_value
;
15180 /* Copy the saved-up fields into the field vector. */
15181 for (int i
= 0; i
< nfields
; ++i
)
15183 struct nextfield
&field
15184 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
15185 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
15187 TYPE_FIELD (type
, i
) = field
.field
;
15188 switch (field
.accessibility
)
15190 case DW_ACCESS_private
:
15191 if (cu
->language
!= language_ada
)
15192 SET_TYPE_FIELD_PRIVATE (type
, i
);
15195 case DW_ACCESS_protected
:
15196 if (cu
->language
!= language_ada
)
15197 SET_TYPE_FIELD_PROTECTED (type
, i
);
15200 case DW_ACCESS_public
:
15204 /* Unknown accessibility. Complain and treat it as public. */
15206 complaint (_("unsupported accessibility %d"),
15207 field
.accessibility
);
15211 if (i
< fip
->baseclasses
.size ())
15213 switch (field
.virtuality
)
15215 case DW_VIRTUALITY_virtual
:
15216 case DW_VIRTUALITY_pure_virtual
:
15217 if (cu
->language
== language_ada
)
15218 error (_("unexpected virtuality in component of Ada type"));
15219 SET_TYPE_FIELD_VIRTUAL (type
, i
);
15226 /* Return true if this member function is a constructor, false
15230 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
15232 const char *fieldname
;
15233 const char *type_name
;
15236 if (die
->parent
== NULL
)
15239 if (die
->parent
->tag
!= DW_TAG_structure_type
15240 && die
->parent
->tag
!= DW_TAG_union_type
15241 && die
->parent
->tag
!= DW_TAG_class_type
)
15244 fieldname
= dwarf2_name (die
, cu
);
15245 type_name
= dwarf2_name (die
->parent
, cu
);
15246 if (fieldname
== NULL
|| type_name
== NULL
)
15249 len
= strlen (fieldname
);
15250 return (strncmp (fieldname
, type_name
, len
) == 0
15251 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
15254 /* Add a member function to the proper fieldlist. */
15257 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15258 struct type
*type
, struct dwarf2_cu
*cu
)
15260 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15261 struct attribute
*attr
;
15263 struct fnfieldlist
*flp
= nullptr;
15264 struct fn_field
*fnp
;
15265 const char *fieldname
;
15266 struct type
*this_type
;
15267 enum dwarf_access_attribute accessibility
;
15269 if (cu
->language
== language_ada
)
15270 error (_("unexpected member function in Ada type"));
15272 /* Get name of member function. */
15273 fieldname
= dwarf2_name (die
, cu
);
15274 if (fieldname
== NULL
)
15277 /* Look up member function name in fieldlist. */
15278 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15280 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15282 flp
= &fip
->fnfieldlists
[i
];
15287 /* Create a new fnfieldlist if necessary. */
15288 if (flp
== nullptr)
15290 fip
->fnfieldlists
.emplace_back ();
15291 flp
= &fip
->fnfieldlists
.back ();
15292 flp
->name
= fieldname
;
15293 i
= fip
->fnfieldlists
.size () - 1;
15296 /* Create a new member function field and add it to the vector of
15298 flp
->fnfields
.emplace_back ();
15299 fnp
= &flp
->fnfields
.back ();
15301 /* Delay processing of the physname until later. */
15302 if (cu
->language
== language_cplus
)
15303 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15307 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15308 fnp
->physname
= physname
? physname
: "";
15311 fnp
->type
= alloc_type (objfile
);
15312 this_type
= read_type_die (die
, cu
);
15313 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
15315 int nparams
= TYPE_NFIELDS (this_type
);
15317 /* TYPE is the domain of this method, and THIS_TYPE is the type
15318 of the method itself (TYPE_CODE_METHOD). */
15319 smash_to_method_type (fnp
->type
, type
,
15320 TYPE_TARGET_TYPE (this_type
),
15321 TYPE_FIELDS (this_type
),
15322 TYPE_NFIELDS (this_type
),
15323 TYPE_VARARGS (this_type
));
15325 /* Handle static member functions.
15326 Dwarf2 has no clean way to discern C++ static and non-static
15327 member functions. G++ helps GDB by marking the first
15328 parameter for non-static member functions (which is the this
15329 pointer) as artificial. We obtain this information from
15330 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15331 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15332 fnp
->voffset
= VOFFSET_STATIC
;
15335 complaint (_("member function type missing for '%s'"),
15336 dwarf2_full_name (fieldname
, die
, cu
));
15338 /* Get fcontext from DW_AT_containing_type if present. */
15339 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15340 fnp
->fcontext
= die_containing_type (die
, cu
);
15342 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15343 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15345 /* Get accessibility. */
15346 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15348 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15350 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15351 switch (accessibility
)
15353 case DW_ACCESS_private
:
15354 fnp
->is_private
= 1;
15356 case DW_ACCESS_protected
:
15357 fnp
->is_protected
= 1;
15361 /* Check for artificial methods. */
15362 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15363 if (attr
&& DW_UNSND (attr
) != 0)
15364 fnp
->is_artificial
= 1;
15366 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15368 /* Get index in virtual function table if it is a virtual member
15369 function. For older versions of GCC, this is an offset in the
15370 appropriate virtual table, as specified by DW_AT_containing_type.
15371 For everyone else, it is an expression to be evaluated relative
15372 to the object address. */
15374 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15377 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
15379 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15381 /* Old-style GCC. */
15382 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15384 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15385 || (DW_BLOCK (attr
)->size
> 1
15386 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15387 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15389 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15390 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15391 dwarf2_complex_location_expr_complaint ();
15393 fnp
->voffset
/= cu
->header
.addr_size
;
15397 dwarf2_complex_location_expr_complaint ();
15399 if (!fnp
->fcontext
)
15401 /* If there is no `this' field and no DW_AT_containing_type,
15402 we cannot actually find a base class context for the
15404 if (TYPE_NFIELDS (this_type
) == 0
15405 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15407 complaint (_("cannot determine context for virtual member "
15408 "function \"%s\" (offset %s)"),
15409 fieldname
, sect_offset_str (die
->sect_off
));
15414 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15418 else if (attr_form_is_section_offset (attr
))
15420 dwarf2_complex_location_expr_complaint ();
15424 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15430 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15431 if (attr
&& DW_UNSND (attr
))
15433 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15434 complaint (_("Member function \"%s\" (offset %s) is virtual "
15435 "but the vtable offset is not specified"),
15436 fieldname
, sect_offset_str (die
->sect_off
));
15437 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15438 TYPE_CPLUS_DYNAMIC (type
) = 1;
15443 /* Create the vector of member function fields, and attach it to the type. */
15446 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15447 struct dwarf2_cu
*cu
)
15449 if (cu
->language
== language_ada
)
15450 error (_("unexpected member functions in Ada type"));
15452 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15453 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15455 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15457 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15459 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15460 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15462 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15463 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15464 fn_flp
->fn_fields
= (struct fn_field
*)
15465 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15467 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15468 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15471 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15474 /* Returns non-zero if NAME is the name of a vtable member in CU's
15475 language, zero otherwise. */
15477 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15479 static const char vptr
[] = "_vptr";
15481 /* Look for the C++ form of the vtable. */
15482 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15488 /* GCC outputs unnamed structures that are really pointers to member
15489 functions, with the ABI-specified layout. If TYPE describes
15490 such a structure, smash it into a member function type.
15492 GCC shouldn't do this; it should just output pointer to member DIEs.
15493 This is GCC PR debug/28767. */
15496 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15498 struct type
*pfn_type
, *self_type
, *new_type
;
15500 /* Check for a structure with no name and two children. */
15501 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15504 /* Check for __pfn and __delta members. */
15505 if (TYPE_FIELD_NAME (type
, 0) == NULL
15506 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15507 || TYPE_FIELD_NAME (type
, 1) == NULL
15508 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15511 /* Find the type of the method. */
15512 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15513 if (pfn_type
== NULL
15514 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15515 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15518 /* Look for the "this" argument. */
15519 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15520 if (TYPE_NFIELDS (pfn_type
) == 0
15521 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15522 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15525 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15526 new_type
= alloc_type (objfile
);
15527 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15528 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15529 TYPE_VARARGS (pfn_type
));
15530 smash_to_methodptr_type (type
, new_type
);
15533 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15534 appropriate error checking and issuing complaints if there is a
15538 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15540 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15542 if (attr
== nullptr)
15545 if (!attr_form_is_constant (attr
))
15547 complaint (_("DW_AT_alignment must have constant form"
15548 " - DIE at %s [in module %s]"),
15549 sect_offset_str (die
->sect_off
),
15550 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15555 if (attr
->form
== DW_FORM_sdata
)
15557 LONGEST val
= DW_SND (attr
);
15560 complaint (_("DW_AT_alignment value must not be negative"
15561 " - DIE at %s [in module %s]"),
15562 sect_offset_str (die
->sect_off
),
15563 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15569 align
= DW_UNSND (attr
);
15573 complaint (_("DW_AT_alignment value must not be zero"
15574 " - DIE at %s [in module %s]"),
15575 sect_offset_str (die
->sect_off
),
15576 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15579 if ((align
& (align
- 1)) != 0)
15581 complaint (_("DW_AT_alignment value must be a power of 2"
15582 " - DIE at %s [in module %s]"),
15583 sect_offset_str (die
->sect_off
),
15584 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15591 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15592 the alignment for TYPE. */
15595 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15598 if (!set_type_align (type
, get_alignment (cu
, die
)))
15599 complaint (_("DW_AT_alignment value too large"
15600 " - DIE at %s [in module %s]"),
15601 sect_offset_str (die
->sect_off
),
15602 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15605 /* Called when we find the DIE that starts a structure or union scope
15606 (definition) to create a type for the structure or union. Fill in
15607 the type's name and general properties; the members will not be
15608 processed until process_structure_scope. A symbol table entry for
15609 the type will also not be done until process_structure_scope (assuming
15610 the type has a name).
15612 NOTE: we need to call these functions regardless of whether or not the
15613 DIE has a DW_AT_name attribute, since it might be an anonymous
15614 structure or union. This gets the type entered into our set of
15615 user defined types. */
15617 static struct type
*
15618 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15620 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15622 struct attribute
*attr
;
15625 /* If the definition of this type lives in .debug_types, read that type.
15626 Don't follow DW_AT_specification though, that will take us back up
15627 the chain and we want to go down. */
15628 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
15631 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15633 /* The type's CU may not be the same as CU.
15634 Ensure TYPE is recorded with CU in die_type_hash. */
15635 return set_die_type (die
, type
, cu
);
15638 type
= alloc_type (objfile
);
15639 INIT_CPLUS_SPECIFIC (type
);
15641 name
= dwarf2_name (die
, cu
);
15644 if (cu
->language
== language_cplus
15645 || cu
->language
== language_d
15646 || cu
->language
== language_rust
)
15648 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15650 /* dwarf2_full_name might have already finished building the DIE's
15651 type. If so, there is no need to continue. */
15652 if (get_die_type (die
, cu
) != NULL
)
15653 return get_die_type (die
, cu
);
15655 TYPE_TAG_NAME (type
) = full_name
;
15656 if (die
->tag
== DW_TAG_structure_type
15657 || die
->tag
== DW_TAG_class_type
)
15658 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
15662 /* The name is already allocated along with this objfile, so
15663 we don't need to duplicate it for the type. */
15664 TYPE_TAG_NAME (type
) = name
;
15665 if (die
->tag
== DW_TAG_class_type
)
15666 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
15670 if (die
->tag
== DW_TAG_structure_type
)
15672 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15674 else if (die
->tag
== DW_TAG_union_type
)
15676 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15678 else if (die
->tag
== DW_TAG_variant_part
)
15680 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15681 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
15685 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15688 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15689 TYPE_DECLARED_CLASS (type
) = 1;
15691 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15694 if (attr_form_is_constant (attr
))
15695 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15698 /* For the moment, dynamic type sizes are not supported
15699 by GDB's struct type. The actual size is determined
15700 on-demand when resolving the type of a given object,
15701 so set the type's length to zero for now. Otherwise,
15702 we record an expression as the length, and that expression
15703 could lead to a very large value, which could eventually
15704 lead to us trying to allocate that much memory when creating
15705 a value of that type. */
15706 TYPE_LENGTH (type
) = 0;
15711 TYPE_LENGTH (type
) = 0;
15714 maybe_set_alignment (cu
, die
, type
);
15716 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15718 /* ICC<14 does not output the required DW_AT_declaration on
15719 incomplete types, but gives them a size of zero. */
15720 TYPE_STUB (type
) = 1;
15723 TYPE_STUB_SUPPORTED (type
) = 1;
15725 if (die_is_declaration (die
, cu
))
15726 TYPE_STUB (type
) = 1;
15727 else if (attr
== NULL
&& die
->child
== NULL
15728 && producer_is_realview (cu
->producer
))
15729 /* RealView does not output the required DW_AT_declaration
15730 on incomplete types. */
15731 TYPE_STUB (type
) = 1;
15733 /* We need to add the type field to the die immediately so we don't
15734 infinitely recurse when dealing with pointers to the structure
15735 type within the structure itself. */
15736 set_die_type (die
, type
, cu
);
15738 /* set_die_type should be already done. */
15739 set_descriptive_type (type
, die
, cu
);
15744 /* A helper for process_structure_scope that handles a single member
15748 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15749 struct field_info
*fi
,
15750 std::vector
<struct symbol
*> *template_args
,
15751 struct dwarf2_cu
*cu
)
15753 if (child_die
->tag
== DW_TAG_member
15754 || child_die
->tag
== DW_TAG_variable
15755 || child_die
->tag
== DW_TAG_variant_part
)
15757 /* NOTE: carlton/2002-11-05: A C++ static data member
15758 should be a DW_TAG_member that is a declaration, but
15759 all versions of G++ as of this writing (so through at
15760 least 3.2.1) incorrectly generate DW_TAG_variable
15761 tags for them instead. */
15762 dwarf2_add_field (fi
, child_die
, cu
);
15764 else if (child_die
->tag
== DW_TAG_subprogram
)
15766 /* Rust doesn't have member functions in the C++ sense.
15767 However, it does emit ordinary functions as children
15768 of a struct DIE. */
15769 if (cu
->language
== language_rust
)
15770 read_func_scope (child_die
, cu
);
15773 /* C++ member function. */
15774 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15777 else if (child_die
->tag
== DW_TAG_inheritance
)
15779 /* C++ base class field. */
15780 dwarf2_add_field (fi
, child_die
, cu
);
15782 else if (type_can_define_types (child_die
))
15783 dwarf2_add_type_defn (fi
, child_die
, cu
);
15784 else if (child_die
->tag
== DW_TAG_template_type_param
15785 || child_die
->tag
== DW_TAG_template_value_param
)
15787 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15790 template_args
->push_back (arg
);
15792 else if (child_die
->tag
== DW_TAG_variant
)
15794 /* In a variant we want to get the discriminant and also add a
15795 field for our sole member child. */
15796 struct attribute
*discr
= dwarf2_attr (child_die
, DW_AT_discr_value
, cu
);
15798 for (struct die_info
*variant_child
= child_die
->child
;
15799 variant_child
!= NULL
;
15800 variant_child
= sibling_die (variant_child
))
15802 if (variant_child
->tag
== DW_TAG_member
)
15804 handle_struct_member_die (variant_child
, type
, fi
,
15805 template_args
, cu
);
15806 /* Only handle the one. */
15811 /* We don't handle this but we might as well report it if we see
15813 if (dwarf2_attr (child_die
, DW_AT_discr_list
, cu
) != nullptr)
15814 complaint (_("DW_AT_discr_list is not supported yet"
15815 " - DIE at %s [in module %s]"),
15816 sect_offset_str (child_die
->sect_off
),
15817 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15819 /* The first field was just added, so we can stash the
15820 discriminant there. */
15821 gdb_assert (!fi
->fields
.empty ());
15823 fi
->fields
.back ().variant
.default_branch
= true;
15825 fi
->fields
.back ().variant
.discriminant_value
= DW_UNSND (discr
);
15829 /* Finish creating a structure or union type, including filling in
15830 its members and creating a symbol for it. */
15833 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15835 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15836 struct die_info
*child_die
;
15839 type
= get_die_type (die
, cu
);
15841 type
= read_structure_type (die
, cu
);
15843 /* When reading a DW_TAG_variant_part, we need to notice when we
15844 read the discriminant member, so we can record it later in the
15845 discriminant_info. */
15846 bool is_variant_part
= TYPE_FLAG_DISCRIMINATED_UNION (type
);
15847 sect_offset discr_offset
;
15849 if (is_variant_part
)
15851 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15854 /* Maybe it's a univariant form, an extension we support.
15855 In this case arrange not to check the offset. */
15856 is_variant_part
= false;
15858 else if (attr_form_is_ref (discr
))
15860 struct dwarf2_cu
*target_cu
= cu
;
15861 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15863 discr_offset
= target_die
->sect_off
;
15867 complaint (_("DW_AT_discr does not have DIE reference form"
15868 " - DIE at %s [in module %s]"),
15869 sect_offset_str (die
->sect_off
),
15870 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15871 is_variant_part
= false;
15875 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15877 struct field_info fi
;
15878 std::vector
<struct symbol
*> template_args
;
15880 child_die
= die
->child
;
15882 while (child_die
&& child_die
->tag
)
15884 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15886 if (is_variant_part
&& discr_offset
== child_die
->sect_off
)
15887 fi
.fields
.back ().variant
.is_discriminant
= true;
15889 child_die
= sibling_die (child_die
);
15892 /* Attach template arguments to type. */
15893 if (!template_args
.empty ())
15895 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15896 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15897 TYPE_TEMPLATE_ARGUMENTS (type
)
15898 = XOBNEWVEC (&objfile
->objfile_obstack
,
15900 TYPE_N_TEMPLATE_ARGUMENTS (type
));
15901 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
15902 template_args
.data (),
15903 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
15904 * sizeof (struct symbol
*)));
15907 /* Attach fields and member functions to the type. */
15909 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
15910 if (!fi
.fnfieldlists
.empty ())
15912 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
15914 /* Get the type which refers to the base class (possibly this
15915 class itself) which contains the vtable pointer for the current
15916 class from the DW_AT_containing_type attribute. This use of
15917 DW_AT_containing_type is a GNU extension. */
15919 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15921 struct type
*t
= die_containing_type (die
, cu
);
15923 set_type_vptr_basetype (type
, t
);
15928 /* Our own class provides vtbl ptr. */
15929 for (i
= TYPE_NFIELDS (t
) - 1;
15930 i
>= TYPE_N_BASECLASSES (t
);
15933 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
15935 if (is_vtable_name (fieldname
, cu
))
15937 set_type_vptr_fieldno (type
, i
);
15942 /* Complain if virtual function table field not found. */
15943 if (i
< TYPE_N_BASECLASSES (t
))
15944 complaint (_("virtual function table pointer "
15945 "not found when defining class '%s'"),
15946 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
15951 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
15954 else if (cu
->producer
15955 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
15957 /* The IBM XLC compiler does not provide direct indication
15958 of the containing type, but the vtable pointer is
15959 always named __vfp. */
15963 for (i
= TYPE_NFIELDS (type
) - 1;
15964 i
>= TYPE_N_BASECLASSES (type
);
15967 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
15969 set_type_vptr_fieldno (type
, i
);
15970 set_type_vptr_basetype (type
, type
);
15977 /* Copy fi.typedef_field_list linked list elements content into the
15978 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
15979 if (!fi
.typedef_field_list
.empty ())
15981 int count
= fi
.typedef_field_list
.size ();
15983 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15984 TYPE_TYPEDEF_FIELD_ARRAY (type
)
15985 = ((struct decl_field
*)
15987 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
15988 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
15990 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
15991 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
15994 /* Copy fi.nested_types_list linked list elements content into the
15995 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
15996 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
15998 int count
= fi
.nested_types_list
.size ();
16000 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16001 TYPE_NESTED_TYPES_ARRAY (type
)
16002 = ((struct decl_field
*)
16003 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
16004 TYPE_NESTED_TYPES_COUNT (type
) = count
;
16006 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
16007 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
16011 quirk_gcc_member_function_pointer (type
, objfile
);
16012 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
16013 cu
->rust_unions
.push_back (type
);
16015 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
16016 snapshots) has been known to create a die giving a declaration
16017 for a class that has, as a child, a die giving a definition for a
16018 nested class. So we have to process our children even if the
16019 current die is a declaration. Normally, of course, a declaration
16020 won't have any children at all. */
16022 child_die
= die
->child
;
16024 while (child_die
!= NULL
&& child_die
->tag
)
16026 if (child_die
->tag
== DW_TAG_member
16027 || child_die
->tag
== DW_TAG_variable
16028 || child_die
->tag
== DW_TAG_inheritance
16029 || child_die
->tag
== DW_TAG_template_value_param
16030 || child_die
->tag
== DW_TAG_template_type_param
)
16035 process_die (child_die
, cu
);
16037 child_die
= sibling_die (child_die
);
16040 /* Do not consider external references. According to the DWARF standard,
16041 these DIEs are identified by the fact that they have no byte_size
16042 attribute, and a declaration attribute. */
16043 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
16044 || !die_is_declaration (die
, cu
))
16045 new_symbol (die
, type
, cu
);
16048 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
16049 update TYPE using some information only available in DIE's children. */
16052 update_enumeration_type_from_children (struct die_info
*die
,
16054 struct dwarf2_cu
*cu
)
16056 struct die_info
*child_die
;
16057 int unsigned_enum
= 1;
16061 auto_obstack obstack
;
16063 for (child_die
= die
->child
;
16064 child_die
!= NULL
&& child_die
->tag
;
16065 child_die
= sibling_die (child_die
))
16067 struct attribute
*attr
;
16069 const gdb_byte
*bytes
;
16070 struct dwarf2_locexpr_baton
*baton
;
16073 if (child_die
->tag
!= DW_TAG_enumerator
)
16076 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
16080 name
= dwarf2_name (child_die
, cu
);
16082 name
= "<anonymous enumerator>";
16084 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
16085 &value
, &bytes
, &baton
);
16091 else if ((mask
& value
) != 0)
16096 /* If we already know that the enum type is neither unsigned, nor
16097 a flag type, no need to look at the rest of the enumerates. */
16098 if (!unsigned_enum
&& !flag_enum
)
16103 TYPE_UNSIGNED (type
) = 1;
16105 TYPE_FLAG_ENUM (type
) = 1;
16108 /* Given a DW_AT_enumeration_type die, set its type. We do not
16109 complete the type's fields yet, or create any symbols. */
16111 static struct type
*
16112 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16114 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16116 struct attribute
*attr
;
16119 /* If the definition of this type lives in .debug_types, read that type.
16120 Don't follow DW_AT_specification though, that will take us back up
16121 the chain and we want to go down. */
16122 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
16125 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16127 /* The type's CU may not be the same as CU.
16128 Ensure TYPE is recorded with CU in die_type_hash. */
16129 return set_die_type (die
, type
, cu
);
16132 type
= alloc_type (objfile
);
16134 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
16135 name
= dwarf2_full_name (NULL
, die
, cu
);
16137 TYPE_TAG_NAME (type
) = name
;
16139 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16142 struct type
*underlying_type
= die_type (die
, cu
);
16144 TYPE_TARGET_TYPE (type
) = underlying_type
;
16147 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16150 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16154 TYPE_LENGTH (type
) = 0;
16157 maybe_set_alignment (cu
, die
, type
);
16159 /* The enumeration DIE can be incomplete. In Ada, any type can be
16160 declared as private in the package spec, and then defined only
16161 inside the package body. Such types are known as Taft Amendment
16162 Types. When another package uses such a type, an incomplete DIE
16163 may be generated by the compiler. */
16164 if (die_is_declaration (die
, cu
))
16165 TYPE_STUB (type
) = 1;
16167 /* Finish the creation of this type by using the enum's children.
16168 We must call this even when the underlying type has been provided
16169 so that we can determine if we're looking at a "flag" enum. */
16170 update_enumeration_type_from_children (die
, type
, cu
);
16172 /* If this type has an underlying type that is not a stub, then we
16173 may use its attributes. We always use the "unsigned" attribute
16174 in this situation, because ordinarily we guess whether the type
16175 is unsigned -- but the guess can be wrong and the underlying type
16176 can tell us the reality. However, we defer to a local size
16177 attribute if one exists, because this lets the compiler override
16178 the underlying type if needed. */
16179 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16181 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
16182 if (TYPE_LENGTH (type
) == 0)
16183 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
16184 if (TYPE_RAW_ALIGN (type
) == 0
16185 && TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)) != 0)
16186 set_type_align (type
, TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)));
16189 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16191 return set_die_type (die
, type
, cu
);
16194 /* Given a pointer to a die which begins an enumeration, process all
16195 the dies that define the members of the enumeration, and create the
16196 symbol for the enumeration type.
16198 NOTE: We reverse the order of the element list. */
16201 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16203 struct type
*this_type
;
16205 this_type
= get_die_type (die
, cu
);
16206 if (this_type
== NULL
)
16207 this_type
= read_enumeration_type (die
, cu
);
16209 if (die
->child
!= NULL
)
16211 struct die_info
*child_die
;
16212 struct symbol
*sym
;
16213 struct field
*fields
= NULL
;
16214 int num_fields
= 0;
16217 child_die
= die
->child
;
16218 while (child_die
&& child_die
->tag
)
16220 if (child_die
->tag
!= DW_TAG_enumerator
)
16222 process_die (child_die
, cu
);
16226 name
= dwarf2_name (child_die
, cu
);
16229 sym
= new_symbol (child_die
, this_type
, cu
);
16231 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
16233 fields
= (struct field
*)
16235 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
16236 * sizeof (struct field
));
16239 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
16240 FIELD_TYPE (fields
[num_fields
]) = NULL
;
16241 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
16242 FIELD_BITSIZE (fields
[num_fields
]) = 0;
16248 child_die
= sibling_die (child_die
);
16253 TYPE_NFIELDS (this_type
) = num_fields
;
16254 TYPE_FIELDS (this_type
) = (struct field
*)
16255 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
16256 memcpy (TYPE_FIELDS (this_type
), fields
,
16257 sizeof (struct field
) * num_fields
);
16262 /* If we are reading an enum from a .debug_types unit, and the enum
16263 is a declaration, and the enum is not the signatured type in the
16264 unit, then we do not want to add a symbol for it. Adding a
16265 symbol would in some cases obscure the true definition of the
16266 enum, giving users an incomplete type when the definition is
16267 actually available. Note that we do not want to do this for all
16268 enums which are just declarations, because C++0x allows forward
16269 enum declarations. */
16270 if (cu
->per_cu
->is_debug_types
16271 && die_is_declaration (die
, cu
))
16273 struct signatured_type
*sig_type
;
16275 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16276 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16277 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16281 new_symbol (die
, this_type
, cu
);
16284 /* Extract all information from a DW_TAG_array_type DIE and put it in
16285 the DIE's type field. For now, this only handles one dimensional
16288 static struct type
*
16289 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16291 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16292 struct die_info
*child_die
;
16294 struct type
*element_type
, *range_type
, *index_type
;
16295 struct attribute
*attr
;
16297 struct dynamic_prop
*byte_stride_prop
= NULL
;
16298 unsigned int bit_stride
= 0;
16300 element_type
= die_type (die
, cu
);
16302 /* The die_type call above may have already set the type for this DIE. */
16303 type
= get_die_type (die
, cu
);
16307 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16313 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16314 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
);
16317 complaint (_("unable to read array DW_AT_byte_stride "
16318 " - DIE at %s [in module %s]"),
16319 sect_offset_str (die
->sect_off
),
16320 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16321 /* Ignore this attribute. We will likely not be able to print
16322 arrays of this type correctly, but there is little we can do
16323 to help if we cannot read the attribute's value. */
16324 byte_stride_prop
= NULL
;
16328 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16330 bit_stride
= DW_UNSND (attr
);
16332 /* Irix 6.2 native cc creates array types without children for
16333 arrays with unspecified length. */
16334 if (die
->child
== NULL
)
16336 index_type
= objfile_type (objfile
)->builtin_int
;
16337 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16338 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16339 byte_stride_prop
, bit_stride
);
16340 return set_die_type (die
, type
, cu
);
16343 std::vector
<struct type
*> range_types
;
16344 child_die
= die
->child
;
16345 while (child_die
&& child_die
->tag
)
16347 if (child_die
->tag
== DW_TAG_subrange_type
)
16349 struct type
*child_type
= read_type_die (child_die
, cu
);
16351 if (child_type
!= NULL
)
16353 /* The range type was succesfully read. Save it for the
16354 array type creation. */
16355 range_types
.push_back (child_type
);
16358 child_die
= sibling_die (child_die
);
16361 /* Dwarf2 dimensions are output from left to right, create the
16362 necessary array types in backwards order. */
16364 type
= element_type
;
16366 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16370 while (i
< range_types
.size ())
16371 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16372 byte_stride_prop
, bit_stride
);
16376 size_t ndim
= range_types
.size ();
16378 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16379 byte_stride_prop
, bit_stride
);
16382 /* Understand Dwarf2 support for vector types (like they occur on
16383 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16384 array type. This is not part of the Dwarf2/3 standard yet, but a
16385 custom vendor extension. The main difference between a regular
16386 array and the vector variant is that vectors are passed by value
16388 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16390 make_vector_type (type
);
16392 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16393 implementation may choose to implement triple vectors using this
16395 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16398 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16399 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16401 complaint (_("DW_AT_byte_size for array type smaller "
16402 "than the total size of elements"));
16405 name
= dwarf2_name (die
, cu
);
16407 TYPE_NAME (type
) = name
;
16409 maybe_set_alignment (cu
, die
, type
);
16411 /* Install the type in the die. */
16412 set_die_type (die
, type
, cu
);
16414 /* set_die_type should be already done. */
16415 set_descriptive_type (type
, die
, cu
);
16420 static enum dwarf_array_dim_ordering
16421 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16423 struct attribute
*attr
;
16425 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16428 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16430 /* GNU F77 is a special case, as at 08/2004 array type info is the
16431 opposite order to the dwarf2 specification, but data is still
16432 laid out as per normal fortran.
16434 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16435 version checking. */
16437 if (cu
->language
== language_fortran
16438 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16440 return DW_ORD_row_major
;
16443 switch (cu
->language_defn
->la_array_ordering
)
16445 case array_column_major
:
16446 return DW_ORD_col_major
;
16447 case array_row_major
:
16449 return DW_ORD_row_major
;
16453 /* Extract all information from a DW_TAG_set_type DIE and put it in
16454 the DIE's type field. */
16456 static struct type
*
16457 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16459 struct type
*domain_type
, *set_type
;
16460 struct attribute
*attr
;
16462 domain_type
= die_type (die
, cu
);
16464 /* The die_type call above may have already set the type for this DIE. */
16465 set_type
= get_die_type (die
, cu
);
16469 set_type
= create_set_type (NULL
, domain_type
);
16471 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16473 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16475 maybe_set_alignment (cu
, die
, set_type
);
16477 return set_die_type (die
, set_type
, cu
);
16480 /* A helper for read_common_block that creates a locexpr baton.
16481 SYM is the symbol which we are marking as computed.
16482 COMMON_DIE is the DIE for the common block.
16483 COMMON_LOC is the location expression attribute for the common
16485 MEMBER_LOC is the location expression attribute for the particular
16486 member of the common block that we are processing.
16487 CU is the CU from which the above come. */
16490 mark_common_block_symbol_computed (struct symbol
*sym
,
16491 struct die_info
*common_die
,
16492 struct attribute
*common_loc
,
16493 struct attribute
*member_loc
,
16494 struct dwarf2_cu
*cu
)
16496 struct dwarf2_per_objfile
*dwarf2_per_objfile
16497 = cu
->per_cu
->dwarf2_per_objfile
;
16498 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16499 struct dwarf2_locexpr_baton
*baton
;
16501 unsigned int cu_off
;
16502 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
16503 LONGEST offset
= 0;
16505 gdb_assert (common_loc
&& member_loc
);
16506 gdb_assert (attr_form_is_block (common_loc
));
16507 gdb_assert (attr_form_is_block (member_loc
)
16508 || attr_form_is_constant (member_loc
));
16510 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16511 baton
->per_cu
= cu
->per_cu
;
16512 gdb_assert (baton
->per_cu
);
16514 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16516 if (attr_form_is_constant (member_loc
))
16518 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
16519 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16522 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16524 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16527 *ptr
++ = DW_OP_call4
;
16528 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16529 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16532 if (attr_form_is_constant (member_loc
))
16534 *ptr
++ = DW_OP_addr
;
16535 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16536 ptr
+= cu
->header
.addr_size
;
16540 /* We have to copy the data here, because DW_OP_call4 will only
16541 use a DW_AT_location attribute. */
16542 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16543 ptr
+= DW_BLOCK (member_loc
)->size
;
16546 *ptr
++ = DW_OP_plus
;
16547 gdb_assert (ptr
- baton
->data
== baton
->size
);
16549 SYMBOL_LOCATION_BATON (sym
) = baton
;
16550 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16553 /* Create appropriate locally-scoped variables for all the
16554 DW_TAG_common_block entries. Also create a struct common_block
16555 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16556 is used to sepate the common blocks name namespace from regular
16560 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16562 struct attribute
*attr
;
16564 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16567 /* Support the .debug_loc offsets. */
16568 if (attr_form_is_block (attr
))
16572 else if (attr_form_is_section_offset (attr
))
16574 dwarf2_complex_location_expr_complaint ();
16579 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16580 "common block member");
16585 if (die
->child
!= NULL
)
16587 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16588 struct die_info
*child_die
;
16589 size_t n_entries
= 0, size
;
16590 struct common_block
*common_block
;
16591 struct symbol
*sym
;
16593 for (child_die
= die
->child
;
16594 child_die
&& child_die
->tag
;
16595 child_die
= sibling_die (child_die
))
16598 size
= (sizeof (struct common_block
)
16599 + (n_entries
- 1) * sizeof (struct symbol
*));
16601 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16603 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16604 common_block
->n_entries
= 0;
16606 for (child_die
= die
->child
;
16607 child_die
&& child_die
->tag
;
16608 child_die
= sibling_die (child_die
))
16610 /* Create the symbol in the DW_TAG_common_block block in the current
16612 sym
= new_symbol (child_die
, NULL
, cu
);
16615 struct attribute
*member_loc
;
16617 common_block
->contents
[common_block
->n_entries
++] = sym
;
16619 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16623 /* GDB has handled this for a long time, but it is
16624 not specified by DWARF. It seems to have been
16625 emitted by gfortran at least as recently as:
16626 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16627 complaint (_("Variable in common block has "
16628 "DW_AT_data_member_location "
16629 "- DIE at %s [in module %s]"),
16630 sect_offset_str (child_die
->sect_off
),
16631 objfile_name (objfile
));
16633 if (attr_form_is_section_offset (member_loc
))
16634 dwarf2_complex_location_expr_complaint ();
16635 else if (attr_form_is_constant (member_loc
)
16636 || attr_form_is_block (member_loc
))
16639 mark_common_block_symbol_computed (sym
, die
, attr
,
16643 dwarf2_complex_location_expr_complaint ();
16648 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16649 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16653 /* Create a type for a C++ namespace. */
16655 static struct type
*
16656 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16658 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16659 const char *previous_prefix
, *name
;
16663 /* For extensions, reuse the type of the original namespace. */
16664 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16666 struct die_info
*ext_die
;
16667 struct dwarf2_cu
*ext_cu
= cu
;
16669 ext_die
= dwarf2_extension (die
, &ext_cu
);
16670 type
= read_type_die (ext_die
, ext_cu
);
16672 /* EXT_CU may not be the same as CU.
16673 Ensure TYPE is recorded with CU in die_type_hash. */
16674 return set_die_type (die
, type
, cu
);
16677 name
= namespace_name (die
, &is_anonymous
, cu
);
16679 /* Now build the name of the current namespace. */
16681 previous_prefix
= determine_prefix (die
, cu
);
16682 if (previous_prefix
[0] != '\0')
16683 name
= typename_concat (&objfile
->objfile_obstack
,
16684 previous_prefix
, name
, 0, cu
);
16686 /* Create the type. */
16687 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16688 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
16690 return set_die_type (die
, type
, cu
);
16693 /* Read a namespace scope. */
16696 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16698 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16701 /* Add a symbol associated to this if we haven't seen the namespace
16702 before. Also, add a using directive if it's an anonymous
16705 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16709 type
= read_type_die (die
, cu
);
16710 new_symbol (die
, type
, cu
);
16712 namespace_name (die
, &is_anonymous
, cu
);
16715 const char *previous_prefix
= determine_prefix (die
, cu
);
16717 std::vector
<const char *> excludes
;
16718 add_using_directive (using_directives (cu
->language
),
16719 previous_prefix
, TYPE_NAME (type
), NULL
,
16720 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16724 if (die
->child
!= NULL
)
16726 struct die_info
*child_die
= die
->child
;
16728 while (child_die
&& child_die
->tag
)
16730 process_die (child_die
, cu
);
16731 child_die
= sibling_die (child_die
);
16736 /* Read a Fortran module as type. This DIE can be only a declaration used for
16737 imported module. Still we need that type as local Fortran "use ... only"
16738 declaration imports depend on the created type in determine_prefix. */
16740 static struct type
*
16741 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16743 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16744 const char *module_name
;
16747 module_name
= dwarf2_name (die
, cu
);
16749 complaint (_("DW_TAG_module has no name, offset %s"),
16750 sect_offset_str (die
->sect_off
));
16751 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16753 /* determine_prefix uses TYPE_TAG_NAME. */
16754 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
16756 return set_die_type (die
, type
, cu
);
16759 /* Read a Fortran module. */
16762 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16764 struct die_info
*child_die
= die
->child
;
16767 type
= read_type_die (die
, cu
);
16768 new_symbol (die
, type
, cu
);
16770 while (child_die
&& child_die
->tag
)
16772 process_die (child_die
, cu
);
16773 child_die
= sibling_die (child_die
);
16777 /* Return the name of the namespace represented by DIE. Set
16778 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16781 static const char *
16782 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16784 struct die_info
*current_die
;
16785 const char *name
= NULL
;
16787 /* Loop through the extensions until we find a name. */
16789 for (current_die
= die
;
16790 current_die
!= NULL
;
16791 current_die
= dwarf2_extension (die
, &cu
))
16793 /* We don't use dwarf2_name here so that we can detect the absence
16794 of a name -> anonymous namespace. */
16795 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16801 /* Is it an anonymous namespace? */
16803 *is_anonymous
= (name
== NULL
);
16805 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16810 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16811 the user defined type vector. */
16813 static struct type
*
16814 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16816 struct gdbarch
*gdbarch
16817 = get_objfile_arch (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16818 struct comp_unit_head
*cu_header
= &cu
->header
;
16820 struct attribute
*attr_byte_size
;
16821 struct attribute
*attr_address_class
;
16822 int byte_size
, addr_class
;
16823 struct type
*target_type
;
16825 target_type
= die_type (die
, cu
);
16827 /* The die_type call above may have already set the type for this DIE. */
16828 type
= get_die_type (die
, cu
);
16832 type
= lookup_pointer_type (target_type
);
16834 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16835 if (attr_byte_size
)
16836 byte_size
= DW_UNSND (attr_byte_size
);
16838 byte_size
= cu_header
->addr_size
;
16840 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16841 if (attr_address_class
)
16842 addr_class
= DW_UNSND (attr_address_class
);
16844 addr_class
= DW_ADDR_none
;
16846 ULONGEST alignment
= get_alignment (cu
, die
);
16848 /* If the pointer size, alignment, or address class is different
16849 than the default, create a type variant marked as such and set
16850 the length accordingly. */
16851 if (TYPE_LENGTH (type
) != byte_size
16852 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
16853 && alignment
!= TYPE_RAW_ALIGN (type
))
16854 || addr_class
!= DW_ADDR_none
)
16856 if (gdbarch_address_class_type_flags_p (gdbarch
))
16860 type_flags
= gdbarch_address_class_type_flags
16861 (gdbarch
, byte_size
, addr_class
);
16862 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16864 type
= make_type_with_address_space (type
, type_flags
);
16866 else if (TYPE_LENGTH (type
) != byte_size
)
16868 complaint (_("invalid pointer size %d"), byte_size
);
16870 else if (TYPE_RAW_ALIGN (type
) != alignment
)
16872 complaint (_("Invalid DW_AT_alignment"
16873 " - DIE at %s [in module %s]"),
16874 sect_offset_str (die
->sect_off
),
16875 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16879 /* Should we also complain about unhandled address classes? */
16883 TYPE_LENGTH (type
) = byte_size
;
16884 set_type_align (type
, alignment
);
16885 return set_die_type (die
, type
, cu
);
16888 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16889 the user defined type vector. */
16891 static struct type
*
16892 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16895 struct type
*to_type
;
16896 struct type
*domain
;
16898 to_type
= die_type (die
, cu
);
16899 domain
= die_containing_type (die
, cu
);
16901 /* The calls above may have already set the type for this DIE. */
16902 type
= get_die_type (die
, cu
);
16906 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
16907 type
= lookup_methodptr_type (to_type
);
16908 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
16910 struct type
*new_type
16911 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16913 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
16914 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
16915 TYPE_VARARGS (to_type
));
16916 type
= lookup_methodptr_type (new_type
);
16919 type
= lookup_memberptr_type (to_type
, domain
);
16921 return set_die_type (die
, type
, cu
);
16924 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
16925 the user defined type vector. */
16927 static struct type
*
16928 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16929 enum type_code refcode
)
16931 struct comp_unit_head
*cu_header
= &cu
->header
;
16932 struct type
*type
, *target_type
;
16933 struct attribute
*attr
;
16935 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
16937 target_type
= die_type (die
, cu
);
16939 /* The die_type call above may have already set the type for this DIE. */
16940 type
= get_die_type (die
, cu
);
16944 type
= lookup_reference_type (target_type
, refcode
);
16945 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16948 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16952 TYPE_LENGTH (type
) = cu_header
->addr_size
;
16954 maybe_set_alignment (cu
, die
, type
);
16955 return set_die_type (die
, type
, cu
);
16958 /* Add the given cv-qualifiers to the element type of the array. GCC
16959 outputs DWARF type qualifiers that apply to an array, not the
16960 element type. But GDB relies on the array element type to carry
16961 the cv-qualifiers. This mimics section 6.7.3 of the C99
16964 static struct type
*
16965 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16966 struct type
*base_type
, int cnst
, int voltl
)
16968 struct type
*el_type
, *inner_array
;
16970 base_type
= copy_type (base_type
);
16971 inner_array
= base_type
;
16973 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
16975 TYPE_TARGET_TYPE (inner_array
) =
16976 copy_type (TYPE_TARGET_TYPE (inner_array
));
16977 inner_array
= TYPE_TARGET_TYPE (inner_array
);
16980 el_type
= TYPE_TARGET_TYPE (inner_array
);
16981 cnst
|= TYPE_CONST (el_type
);
16982 voltl
|= TYPE_VOLATILE (el_type
);
16983 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
16985 return set_die_type (die
, base_type
, cu
);
16988 static struct type
*
16989 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16991 struct type
*base_type
, *cv_type
;
16993 base_type
= die_type (die
, cu
);
16995 /* The die_type call above may have already set the type for this DIE. */
16996 cv_type
= get_die_type (die
, cu
);
17000 /* In case the const qualifier is applied to an array type, the element type
17001 is so qualified, not the array type (section 6.7.3 of C99). */
17002 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17003 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
17005 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
17006 return set_die_type (die
, cv_type
, cu
);
17009 static struct type
*
17010 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17012 struct type
*base_type
, *cv_type
;
17014 base_type
= die_type (die
, cu
);
17016 /* The die_type call above may have already set the type for this DIE. */
17017 cv_type
= get_die_type (die
, cu
);
17021 /* In case the volatile qualifier is applied to an array type, the
17022 element type is so qualified, not the array type (section 6.7.3
17024 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17025 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
17027 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
17028 return set_die_type (die
, cv_type
, cu
);
17031 /* Handle DW_TAG_restrict_type. */
17033 static struct type
*
17034 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17036 struct type
*base_type
, *cv_type
;
17038 base_type
= die_type (die
, cu
);
17040 /* The die_type call above may have already set the type for this DIE. */
17041 cv_type
= get_die_type (die
, cu
);
17045 cv_type
= make_restrict_type (base_type
);
17046 return set_die_type (die
, cv_type
, cu
);
17049 /* Handle DW_TAG_atomic_type. */
17051 static struct type
*
17052 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17054 struct type
*base_type
, *cv_type
;
17056 base_type
= die_type (die
, cu
);
17058 /* The die_type call above may have already set the type for this DIE. */
17059 cv_type
= get_die_type (die
, cu
);
17063 cv_type
= make_atomic_type (base_type
);
17064 return set_die_type (die
, cv_type
, cu
);
17067 /* Extract all information from a DW_TAG_string_type DIE and add to
17068 the user defined type vector. It isn't really a user defined type,
17069 but it behaves like one, with other DIE's using an AT_user_def_type
17070 attribute to reference it. */
17072 static struct type
*
17073 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17075 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17076 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17077 struct type
*type
, *range_type
, *index_type
, *char_type
;
17078 struct attribute
*attr
;
17079 unsigned int length
;
17081 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
17084 length
= DW_UNSND (attr
);
17088 /* Check for the DW_AT_byte_size attribute. */
17089 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17092 length
= DW_UNSND (attr
);
17100 index_type
= objfile_type (objfile
)->builtin_int
;
17101 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17102 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
17103 type
= create_string_type (NULL
, char_type
, range_type
);
17105 return set_die_type (die
, type
, cu
);
17108 /* Assuming that DIE corresponds to a function, returns nonzero
17109 if the function is prototyped. */
17112 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
17114 struct attribute
*attr
;
17116 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
17117 if (attr
&& (DW_UNSND (attr
) != 0))
17120 /* The DWARF standard implies that the DW_AT_prototyped attribute
17121 is only meaninful for C, but the concept also extends to other
17122 languages that allow unprototyped functions (Eg: Objective C).
17123 For all other languages, assume that functions are always
17125 if (cu
->language
!= language_c
17126 && cu
->language
!= language_objc
17127 && cu
->language
!= language_opencl
)
17130 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17131 prototyped and unprototyped functions; default to prototyped,
17132 since that is more common in modern code (and RealView warns
17133 about unprototyped functions). */
17134 if (producer_is_realview (cu
->producer
))
17140 /* Handle DIES due to C code like:
17144 int (*funcp)(int a, long l);
17148 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17150 static struct type
*
17151 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17153 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17154 struct type
*type
; /* Type that this function returns. */
17155 struct type
*ftype
; /* Function that returns above type. */
17156 struct attribute
*attr
;
17158 type
= die_type (die
, cu
);
17160 /* The die_type call above may have already set the type for this DIE. */
17161 ftype
= get_die_type (die
, cu
);
17165 ftype
= lookup_function_type (type
);
17167 if (prototyped_function_p (die
, cu
))
17168 TYPE_PROTOTYPED (ftype
) = 1;
17170 /* Store the calling convention in the type if it's available in
17171 the subroutine die. Otherwise set the calling convention to
17172 the default value DW_CC_normal. */
17173 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17175 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
17176 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17177 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17179 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17181 /* Record whether the function returns normally to its caller or not
17182 if the DWARF producer set that information. */
17183 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17184 if (attr
&& (DW_UNSND (attr
) != 0))
17185 TYPE_NO_RETURN (ftype
) = 1;
17187 /* We need to add the subroutine type to the die immediately so
17188 we don't infinitely recurse when dealing with parameters
17189 declared as the same subroutine type. */
17190 set_die_type (die
, ftype
, cu
);
17192 if (die
->child
!= NULL
)
17194 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17195 struct die_info
*child_die
;
17196 int nparams
, iparams
;
17198 /* Count the number of parameters.
17199 FIXME: GDB currently ignores vararg functions, but knows about
17200 vararg member functions. */
17202 child_die
= die
->child
;
17203 while (child_die
&& child_die
->tag
)
17205 if (child_die
->tag
== DW_TAG_formal_parameter
)
17207 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17208 TYPE_VARARGS (ftype
) = 1;
17209 child_die
= sibling_die (child_die
);
17212 /* Allocate storage for parameters and fill them in. */
17213 TYPE_NFIELDS (ftype
) = nparams
;
17214 TYPE_FIELDS (ftype
) = (struct field
*)
17215 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
17217 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17218 even if we error out during the parameters reading below. */
17219 for (iparams
= 0; iparams
< nparams
; iparams
++)
17220 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17223 child_die
= die
->child
;
17224 while (child_die
&& child_die
->tag
)
17226 if (child_die
->tag
== DW_TAG_formal_parameter
)
17228 struct type
*arg_type
;
17230 /* DWARF version 2 has no clean way to discern C++
17231 static and non-static member functions. G++ helps
17232 GDB by marking the first parameter for non-static
17233 member functions (which is the this pointer) as
17234 artificial. We pass this information to
17235 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17237 DWARF version 3 added DW_AT_object_pointer, which GCC
17238 4.5 does not yet generate. */
17239 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17241 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17243 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17244 arg_type
= die_type (child_die
, cu
);
17246 /* RealView does not mark THIS as const, which the testsuite
17247 expects. GCC marks THIS as const in method definitions,
17248 but not in the class specifications (GCC PR 43053). */
17249 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17250 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17253 struct dwarf2_cu
*arg_cu
= cu
;
17254 const char *name
= dwarf2_name (child_die
, cu
);
17256 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17259 /* If the compiler emits this, use it. */
17260 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17263 else if (name
&& strcmp (name
, "this") == 0)
17264 /* Function definitions will have the argument names. */
17266 else if (name
== NULL
&& iparams
== 0)
17267 /* Declarations may not have the names, so like
17268 elsewhere in GDB, assume an artificial first
17269 argument is "this". */
17273 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17277 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17280 child_die
= sibling_die (child_die
);
17287 static struct type
*
17288 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17290 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17291 const char *name
= NULL
;
17292 struct type
*this_type
, *target_type
;
17294 name
= dwarf2_full_name (NULL
, die
, cu
);
17295 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17296 TYPE_TARGET_STUB (this_type
) = 1;
17297 set_die_type (die
, this_type
, cu
);
17298 target_type
= die_type (die
, cu
);
17299 if (target_type
!= this_type
)
17300 TYPE_TARGET_TYPE (this_type
) = target_type
;
17303 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17304 spec and cause infinite loops in GDB. */
17305 complaint (_("Self-referential DW_TAG_typedef "
17306 "- DIE at %s [in module %s]"),
17307 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17308 TYPE_TARGET_TYPE (this_type
) = NULL
;
17313 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17314 (which may be different from NAME) to the architecture back-end to allow
17315 it to guess the correct format if necessary. */
17317 static struct type
*
17318 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17319 const char *name_hint
)
17321 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17322 const struct floatformat
**format
;
17325 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17327 type
= init_float_type (objfile
, bits
, name
, format
);
17329 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17334 /* Find a representation of a given base type and install
17335 it in the TYPE field of the die. */
17337 static struct type
*
17338 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17340 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17342 struct attribute
*attr
;
17343 int encoding
= 0, bits
= 0;
17346 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17349 encoding
= DW_UNSND (attr
);
17351 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17354 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17356 name
= dwarf2_name (die
, cu
);
17359 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
17364 case DW_ATE_address
:
17365 /* Turn DW_ATE_address into a void * pointer. */
17366 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17367 type
= init_pointer_type (objfile
, bits
, name
, type
);
17369 case DW_ATE_boolean
:
17370 type
= init_boolean_type (objfile
, bits
, 1, name
);
17372 case DW_ATE_complex_float
:
17373 type
= dwarf2_init_float_type (objfile
, bits
/ 2, NULL
, name
);
17374 type
= init_complex_type (objfile
, name
, type
);
17376 case DW_ATE_decimal_float
:
17377 type
= init_decfloat_type (objfile
, bits
, name
);
17380 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
17382 case DW_ATE_signed
:
17383 type
= init_integer_type (objfile
, bits
, 0, name
);
17385 case DW_ATE_unsigned
:
17386 if (cu
->language
== language_fortran
17388 && startswith (name
, "character("))
17389 type
= init_character_type (objfile
, bits
, 1, name
);
17391 type
= init_integer_type (objfile
, bits
, 1, name
);
17393 case DW_ATE_signed_char
:
17394 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17395 || cu
->language
== language_pascal
17396 || cu
->language
== language_fortran
)
17397 type
= init_character_type (objfile
, bits
, 0, name
);
17399 type
= init_integer_type (objfile
, bits
, 0, name
);
17401 case DW_ATE_unsigned_char
:
17402 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17403 || cu
->language
== language_pascal
17404 || cu
->language
== language_fortran
17405 || cu
->language
== language_rust
)
17406 type
= init_character_type (objfile
, bits
, 1, name
);
17408 type
= init_integer_type (objfile
, bits
, 1, name
);
17412 gdbarch
*arch
= get_objfile_arch (objfile
);
17415 type
= builtin_type (arch
)->builtin_char16
;
17416 else if (bits
== 32)
17417 type
= builtin_type (arch
)->builtin_char32
;
17420 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
17422 type
= init_integer_type (objfile
, bits
, 1, name
);
17424 return set_die_type (die
, type
, cu
);
17429 complaint (_("unsupported DW_AT_encoding: '%s'"),
17430 dwarf_type_encoding_name (encoding
));
17431 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17435 if (name
&& strcmp (name
, "char") == 0)
17436 TYPE_NOSIGN (type
) = 1;
17438 maybe_set_alignment (cu
, die
, type
);
17440 return set_die_type (die
, type
, cu
);
17443 /* Parse dwarf attribute if it's a block, reference or constant and put the
17444 resulting value of the attribute into struct bound_prop.
17445 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17448 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17449 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
17451 struct dwarf2_property_baton
*baton
;
17452 struct obstack
*obstack
17453 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17455 if (attr
== NULL
|| prop
== NULL
)
17458 if (attr_form_is_block (attr
))
17460 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17461 baton
->referenced_type
= NULL
;
17462 baton
->locexpr
.per_cu
= cu
->per_cu
;
17463 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17464 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17465 prop
->data
.baton
= baton
;
17466 prop
->kind
= PROP_LOCEXPR
;
17467 gdb_assert (prop
->data
.baton
!= NULL
);
17469 else if (attr_form_is_ref (attr
))
17471 struct dwarf2_cu
*target_cu
= cu
;
17472 struct die_info
*target_die
;
17473 struct attribute
*target_attr
;
17475 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17476 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17477 if (target_attr
== NULL
)
17478 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17480 if (target_attr
== NULL
)
17483 switch (target_attr
->name
)
17485 case DW_AT_location
:
17486 if (attr_form_is_section_offset (target_attr
))
17488 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17489 baton
->referenced_type
= die_type (target_die
, target_cu
);
17490 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17491 prop
->data
.baton
= baton
;
17492 prop
->kind
= PROP_LOCLIST
;
17493 gdb_assert (prop
->data
.baton
!= NULL
);
17495 else if (attr_form_is_block (target_attr
))
17497 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17498 baton
->referenced_type
= die_type (target_die
, target_cu
);
17499 baton
->locexpr
.per_cu
= cu
->per_cu
;
17500 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17501 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17502 prop
->data
.baton
= baton
;
17503 prop
->kind
= PROP_LOCEXPR
;
17504 gdb_assert (prop
->data
.baton
!= NULL
);
17508 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17509 "dynamic property");
17513 case DW_AT_data_member_location
:
17517 if (!handle_data_member_location (target_die
, target_cu
,
17521 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17522 baton
->referenced_type
= read_type_die (target_die
->parent
,
17524 baton
->offset_info
.offset
= offset
;
17525 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17526 prop
->data
.baton
= baton
;
17527 prop
->kind
= PROP_ADDR_OFFSET
;
17532 else if (attr_form_is_constant (attr
))
17534 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
17535 prop
->kind
= PROP_CONST
;
17539 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17540 dwarf2_name (die
, cu
));
17547 /* Read the given DW_AT_subrange DIE. */
17549 static struct type
*
17550 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17552 struct type
*base_type
, *orig_base_type
;
17553 struct type
*range_type
;
17554 struct attribute
*attr
;
17555 struct dynamic_prop low
, high
;
17556 int low_default_is_valid
;
17557 int high_bound_is_count
= 0;
17559 LONGEST negative_mask
;
17561 orig_base_type
= die_type (die
, cu
);
17562 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17563 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17564 creating the range type, but we use the result of check_typedef
17565 when examining properties of the type. */
17566 base_type
= check_typedef (orig_base_type
);
17568 /* The die_type call above may have already set the type for this DIE. */
17569 range_type
= get_die_type (die
, cu
);
17573 low
.kind
= PROP_CONST
;
17574 high
.kind
= PROP_CONST
;
17575 high
.data
.const_val
= 0;
17577 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17578 omitting DW_AT_lower_bound. */
17579 switch (cu
->language
)
17582 case language_cplus
:
17583 low
.data
.const_val
= 0;
17584 low_default_is_valid
= 1;
17586 case language_fortran
:
17587 low
.data
.const_val
= 1;
17588 low_default_is_valid
= 1;
17591 case language_objc
:
17592 case language_rust
:
17593 low
.data
.const_val
= 0;
17594 low_default_is_valid
= (cu
->header
.version
>= 4);
17598 case language_pascal
:
17599 low
.data
.const_val
= 1;
17600 low_default_is_valid
= (cu
->header
.version
>= 4);
17603 low
.data
.const_val
= 0;
17604 low_default_is_valid
= 0;
17608 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17610 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
17611 else if (!low_default_is_valid
)
17612 complaint (_("Missing DW_AT_lower_bound "
17613 "- DIE at %s [in module %s]"),
17614 sect_offset_str (die
->sect_off
),
17615 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17617 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17618 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17620 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
17621 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17623 /* If bounds are constant do the final calculation here. */
17624 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17625 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17627 high_bound_is_count
= 1;
17631 /* Dwarf-2 specifications explicitly allows to create subrange types
17632 without specifying a base type.
17633 In that case, the base type must be set to the type of
17634 the lower bound, upper bound or count, in that order, if any of these
17635 three attributes references an object that has a type.
17636 If no base type is found, the Dwarf-2 specifications say that
17637 a signed integer type of size equal to the size of an address should
17639 For the following C code: `extern char gdb_int [];'
17640 GCC produces an empty range DIE.
17641 FIXME: muller/2010-05-28: Possible references to object for low bound,
17642 high bound or count are not yet handled by this code. */
17643 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
17645 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17646 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17647 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
17648 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
17650 /* Test "int", "long int", and "long long int" objfile types,
17651 and select the first one having a size above or equal to the
17652 architecture address size. */
17653 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17654 base_type
= int_type
;
17657 int_type
= objfile_type (objfile
)->builtin_long
;
17658 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17659 base_type
= int_type
;
17662 int_type
= objfile_type (objfile
)->builtin_long_long
;
17663 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17664 base_type
= int_type
;
17669 /* Normally, the DWARF producers are expected to use a signed
17670 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17671 But this is unfortunately not always the case, as witnessed
17672 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17673 is used instead. To work around that ambiguity, we treat
17674 the bounds as signed, and thus sign-extend their values, when
17675 the base type is signed. */
17677 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17678 if (low
.kind
== PROP_CONST
17679 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17680 low
.data
.const_val
|= negative_mask
;
17681 if (high
.kind
== PROP_CONST
17682 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17683 high
.data
.const_val
|= negative_mask
;
17685 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
17687 if (high_bound_is_count
)
17688 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17690 /* Ada expects an empty array on no boundary attributes. */
17691 if (attr
== NULL
&& cu
->language
!= language_ada
)
17692 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17694 name
= dwarf2_name (die
, cu
);
17696 TYPE_NAME (range_type
) = name
;
17698 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17700 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17702 maybe_set_alignment (cu
, die
, range_type
);
17704 set_die_type (die
, range_type
, cu
);
17706 /* set_die_type should be already done. */
17707 set_descriptive_type (range_type
, die
, cu
);
17712 static struct type
*
17713 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17717 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
17719 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
17721 /* In Ada, an unspecified type is typically used when the description
17722 of the type is defered to a different unit. When encountering
17723 such a type, we treat it as a stub, and try to resolve it later on,
17725 if (cu
->language
== language_ada
)
17726 TYPE_STUB (type
) = 1;
17728 return set_die_type (die
, type
, cu
);
17731 /* Read a single die and all its descendents. Set the die's sibling
17732 field to NULL; set other fields in the die correctly, and set all
17733 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17734 location of the info_ptr after reading all of those dies. PARENT
17735 is the parent of the die in question. */
17737 static struct die_info
*
17738 read_die_and_children (const struct die_reader_specs
*reader
,
17739 const gdb_byte
*info_ptr
,
17740 const gdb_byte
**new_info_ptr
,
17741 struct die_info
*parent
)
17743 struct die_info
*die
;
17744 const gdb_byte
*cur_ptr
;
17747 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
17750 *new_info_ptr
= cur_ptr
;
17753 store_in_ref_table (die
, reader
->cu
);
17756 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17760 *new_info_ptr
= cur_ptr
;
17763 die
->sibling
= NULL
;
17764 die
->parent
= parent
;
17768 /* Read a die, all of its descendents, and all of its siblings; set
17769 all of the fields of all of the dies correctly. Arguments are as
17770 in read_die_and_children. */
17772 static struct die_info
*
17773 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17774 const gdb_byte
*info_ptr
,
17775 const gdb_byte
**new_info_ptr
,
17776 struct die_info
*parent
)
17778 struct die_info
*first_die
, *last_sibling
;
17779 const gdb_byte
*cur_ptr
;
17781 cur_ptr
= info_ptr
;
17782 first_die
= last_sibling
= NULL
;
17786 struct die_info
*die
17787 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17791 *new_info_ptr
= cur_ptr
;
17798 last_sibling
->sibling
= die
;
17800 last_sibling
= die
;
17804 /* Read a die, all of its descendents, and all of its siblings; set
17805 all of the fields of all of the dies correctly. Arguments are as
17806 in read_die_and_children.
17807 This the main entry point for reading a DIE and all its children. */
17809 static struct die_info
*
17810 read_die_and_siblings (const struct die_reader_specs
*reader
,
17811 const gdb_byte
*info_ptr
,
17812 const gdb_byte
**new_info_ptr
,
17813 struct die_info
*parent
)
17815 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17816 new_info_ptr
, parent
);
17818 if (dwarf_die_debug
)
17820 fprintf_unfiltered (gdb_stdlog
,
17821 "Read die from %s@0x%x of %s:\n",
17822 get_section_name (reader
->die_section
),
17823 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17824 bfd_get_filename (reader
->abfd
));
17825 dump_die (die
, dwarf_die_debug
);
17831 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
17833 The caller is responsible for filling in the extra attributes
17834 and updating (*DIEP)->num_attrs.
17835 Set DIEP to point to a newly allocated die with its information,
17836 except for its child, sibling, and parent fields.
17837 Set HAS_CHILDREN to tell whether the die has children or not. */
17839 static const gdb_byte
*
17840 read_full_die_1 (const struct die_reader_specs
*reader
,
17841 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17842 int *has_children
, int num_extra_attrs
)
17844 unsigned int abbrev_number
, bytes_read
, i
;
17845 struct abbrev_info
*abbrev
;
17846 struct die_info
*die
;
17847 struct dwarf2_cu
*cu
= reader
->cu
;
17848 bfd
*abfd
= reader
->abfd
;
17850 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
17851 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17852 info_ptr
+= bytes_read
;
17853 if (!abbrev_number
)
17860 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
17862 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
17864 bfd_get_filename (abfd
));
17866 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
17867 die
->sect_off
= sect_off
;
17868 die
->tag
= abbrev
->tag
;
17869 die
->abbrev
= abbrev_number
;
17871 /* Make the result usable.
17872 The caller needs to update num_attrs after adding the extra
17874 die
->num_attrs
= abbrev
->num_attrs
;
17876 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
17877 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
17881 *has_children
= abbrev
->has_children
;
17885 /* Read a die and all its attributes.
17886 Set DIEP to point to a newly allocated die with its information,
17887 except for its child, sibling, and parent fields.
17888 Set HAS_CHILDREN to tell whether the die has children or not. */
17890 static const gdb_byte
*
17891 read_full_die (const struct die_reader_specs
*reader
,
17892 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17895 const gdb_byte
*result
;
17897 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
17899 if (dwarf_die_debug
)
17901 fprintf_unfiltered (gdb_stdlog
,
17902 "Read die from %s@0x%x of %s:\n",
17903 get_section_name (reader
->die_section
),
17904 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17905 bfd_get_filename (reader
->abfd
));
17906 dump_die (*diep
, dwarf_die_debug
);
17912 /* Abbreviation tables.
17914 In DWARF version 2, the description of the debugging information is
17915 stored in a separate .debug_abbrev section. Before we read any
17916 dies from a section we read in all abbreviations and install them
17917 in a hash table. */
17919 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
17921 struct abbrev_info
*
17922 abbrev_table::alloc_abbrev ()
17924 struct abbrev_info
*abbrev
;
17926 abbrev
= XOBNEW (&abbrev_obstack
, struct abbrev_info
);
17927 memset (abbrev
, 0, sizeof (struct abbrev_info
));
17932 /* Add an abbreviation to the table. */
17935 abbrev_table::add_abbrev (unsigned int abbrev_number
,
17936 struct abbrev_info
*abbrev
)
17938 unsigned int hash_number
;
17940 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
17941 abbrev
->next
= m_abbrevs
[hash_number
];
17942 m_abbrevs
[hash_number
] = abbrev
;
17945 /* Look up an abbrev in the table.
17946 Returns NULL if the abbrev is not found. */
17948 struct abbrev_info
*
17949 abbrev_table::lookup_abbrev (unsigned int abbrev_number
)
17951 unsigned int hash_number
;
17952 struct abbrev_info
*abbrev
;
17954 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
17955 abbrev
= m_abbrevs
[hash_number
];
17959 if (abbrev
->number
== abbrev_number
)
17961 abbrev
= abbrev
->next
;
17966 /* Read in an abbrev table. */
17968 static abbrev_table_up
17969 abbrev_table_read_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
17970 struct dwarf2_section_info
*section
,
17971 sect_offset sect_off
)
17973 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17974 bfd
*abfd
= get_section_bfd_owner (section
);
17975 const gdb_byte
*abbrev_ptr
;
17976 struct abbrev_info
*cur_abbrev
;
17977 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
17978 unsigned int abbrev_form
;
17979 struct attr_abbrev
*cur_attrs
;
17980 unsigned int allocated_attrs
;
17982 abbrev_table_up
abbrev_table (new struct abbrev_table (sect_off
));
17984 dwarf2_read_section (objfile
, section
);
17985 abbrev_ptr
= section
->buffer
+ to_underlying (sect_off
);
17986 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
17987 abbrev_ptr
+= bytes_read
;
17989 allocated_attrs
= ATTR_ALLOC_CHUNK
;
17990 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
17992 /* Loop until we reach an abbrev number of 0. */
17993 while (abbrev_number
)
17995 cur_abbrev
= abbrev_table
->alloc_abbrev ();
17997 /* read in abbrev header */
17998 cur_abbrev
->number
= abbrev_number
;
18000 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18001 abbrev_ptr
+= bytes_read
;
18002 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
18005 /* now read in declarations */
18008 LONGEST implicit_const
;
18010 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18011 abbrev_ptr
+= bytes_read
;
18012 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18013 abbrev_ptr
+= bytes_read
;
18014 if (abbrev_form
== DW_FORM_implicit_const
)
18016 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
18018 abbrev_ptr
+= bytes_read
;
18022 /* Initialize it due to a false compiler warning. */
18023 implicit_const
= -1;
18026 if (abbrev_name
== 0)
18029 if (cur_abbrev
->num_attrs
== allocated_attrs
)
18031 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
18033 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
18036 cur_attrs
[cur_abbrev
->num_attrs
].name
18037 = (enum dwarf_attribute
) abbrev_name
;
18038 cur_attrs
[cur_abbrev
->num_attrs
].form
18039 = (enum dwarf_form
) abbrev_form
;
18040 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
18041 ++cur_abbrev
->num_attrs
;
18044 cur_abbrev
->attrs
=
18045 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
18046 cur_abbrev
->num_attrs
);
18047 memcpy (cur_abbrev
->attrs
, cur_attrs
,
18048 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
18050 abbrev_table
->add_abbrev (abbrev_number
, cur_abbrev
);
18052 /* Get next abbreviation.
18053 Under Irix6 the abbreviations for a compilation unit are not
18054 always properly terminated with an abbrev number of 0.
18055 Exit loop if we encounter an abbreviation which we have
18056 already read (which means we are about to read the abbreviations
18057 for the next compile unit) or if the end of the abbreviation
18058 table is reached. */
18059 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
18061 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18062 abbrev_ptr
+= bytes_read
;
18063 if (abbrev_table
->lookup_abbrev (abbrev_number
) != NULL
)
18068 return abbrev_table
;
18071 /* Returns nonzero if TAG represents a type that we might generate a partial
18075 is_type_tag_for_partial (int tag
)
18080 /* Some types that would be reasonable to generate partial symbols for,
18081 that we don't at present. */
18082 case DW_TAG_array_type
:
18083 case DW_TAG_file_type
:
18084 case DW_TAG_ptr_to_member_type
:
18085 case DW_TAG_set_type
:
18086 case DW_TAG_string_type
:
18087 case DW_TAG_subroutine_type
:
18089 case DW_TAG_base_type
:
18090 case DW_TAG_class_type
:
18091 case DW_TAG_interface_type
:
18092 case DW_TAG_enumeration_type
:
18093 case DW_TAG_structure_type
:
18094 case DW_TAG_subrange_type
:
18095 case DW_TAG_typedef
:
18096 case DW_TAG_union_type
:
18103 /* Load all DIEs that are interesting for partial symbols into memory. */
18105 static struct partial_die_info
*
18106 load_partial_dies (const struct die_reader_specs
*reader
,
18107 const gdb_byte
*info_ptr
, int building_psymtab
)
18109 struct dwarf2_cu
*cu
= reader
->cu
;
18110 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18111 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18112 unsigned int bytes_read
;
18113 unsigned int load_all
= 0;
18114 int nesting_level
= 1;
18119 gdb_assert (cu
->per_cu
!= NULL
);
18120 if (cu
->per_cu
->load_all_dies
)
18124 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18128 &cu
->comp_unit_obstack
,
18129 hashtab_obstack_allocate
,
18130 dummy_obstack_deallocate
);
18134 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18136 /* A NULL abbrev means the end of a series of children. */
18137 if (abbrev
== NULL
)
18139 if (--nesting_level
== 0)
18142 info_ptr
+= bytes_read
;
18143 last_die
= parent_die
;
18144 parent_die
= parent_die
->die_parent
;
18148 /* Check for template arguments. We never save these; if
18149 they're seen, we just mark the parent, and go on our way. */
18150 if (parent_die
!= NULL
18151 && cu
->language
== language_cplus
18152 && (abbrev
->tag
== DW_TAG_template_type_param
18153 || abbrev
->tag
== DW_TAG_template_value_param
))
18155 parent_die
->has_template_arguments
= 1;
18159 /* We don't need a partial DIE for the template argument. */
18160 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18165 /* We only recurse into c++ subprograms looking for template arguments.
18166 Skip their other children. */
18168 && cu
->language
== language_cplus
18169 && parent_die
!= NULL
18170 && parent_die
->tag
== DW_TAG_subprogram
)
18172 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18176 /* Check whether this DIE is interesting enough to save. Normally
18177 we would not be interested in members here, but there may be
18178 later variables referencing them via DW_AT_specification (for
18179 static members). */
18181 && !is_type_tag_for_partial (abbrev
->tag
)
18182 && abbrev
->tag
!= DW_TAG_constant
18183 && abbrev
->tag
!= DW_TAG_enumerator
18184 && abbrev
->tag
!= DW_TAG_subprogram
18185 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18186 && abbrev
->tag
!= DW_TAG_lexical_block
18187 && abbrev
->tag
!= DW_TAG_variable
18188 && abbrev
->tag
!= DW_TAG_namespace
18189 && abbrev
->tag
!= DW_TAG_module
18190 && abbrev
->tag
!= DW_TAG_member
18191 && abbrev
->tag
!= DW_TAG_imported_unit
18192 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18194 /* Otherwise we skip to the next sibling, if any. */
18195 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18199 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18202 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18204 /* This two-pass algorithm for processing partial symbols has a
18205 high cost in cache pressure. Thus, handle some simple cases
18206 here which cover the majority of C partial symbols. DIEs
18207 which neither have specification tags in them, nor could have
18208 specification tags elsewhere pointing at them, can simply be
18209 processed and discarded.
18211 This segment is also optional; scan_partial_symbols and
18212 add_partial_symbol will handle these DIEs if we chain
18213 them in normally. When compilers which do not emit large
18214 quantities of duplicate debug information are more common,
18215 this code can probably be removed. */
18217 /* Any complete simple types at the top level (pretty much all
18218 of them, for a language without namespaces), can be processed
18220 if (parent_die
== NULL
18221 && pdi
.has_specification
== 0
18222 && pdi
.is_declaration
== 0
18223 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18224 || pdi
.tag
== DW_TAG_base_type
18225 || pdi
.tag
== DW_TAG_subrange_type
))
18227 if (building_psymtab
&& pdi
.name
!= NULL
)
18228 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18229 VAR_DOMAIN
, LOC_TYPEDEF
,
18230 &objfile
->static_psymbols
,
18231 0, cu
->language
, objfile
);
18232 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18236 /* The exception for DW_TAG_typedef with has_children above is
18237 a workaround of GCC PR debug/47510. In the case of this complaint
18238 type_name_no_tag_or_error will error on such types later.
18240 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18241 it could not find the child DIEs referenced later, this is checked
18242 above. In correct DWARF DW_TAG_typedef should have no children. */
18244 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18245 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18246 "- DIE at %s [in module %s]"),
18247 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18249 /* If we're at the second level, and we're an enumerator, and
18250 our parent has no specification (meaning possibly lives in a
18251 namespace elsewhere), then we can add the partial symbol now
18252 instead of queueing it. */
18253 if (pdi
.tag
== DW_TAG_enumerator
18254 && parent_die
!= NULL
18255 && parent_die
->die_parent
== NULL
18256 && parent_die
->tag
== DW_TAG_enumeration_type
18257 && parent_die
->has_specification
== 0)
18259 if (pdi
.name
== NULL
)
18260 complaint (_("malformed enumerator DIE ignored"));
18261 else if (building_psymtab
)
18262 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18263 VAR_DOMAIN
, LOC_CONST
,
18264 cu
->language
== language_cplus
18265 ? &objfile
->global_psymbols
18266 : &objfile
->static_psymbols
,
18267 0, cu
->language
, objfile
);
18269 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18273 struct partial_die_info
*part_die
18274 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18276 /* We'll save this DIE so link it in. */
18277 part_die
->die_parent
= parent_die
;
18278 part_die
->die_sibling
= NULL
;
18279 part_die
->die_child
= NULL
;
18281 if (last_die
&& last_die
== parent_die
)
18282 last_die
->die_child
= part_die
;
18284 last_die
->die_sibling
= part_die
;
18286 last_die
= part_die
;
18288 if (first_die
== NULL
)
18289 first_die
= part_die
;
18291 /* Maybe add the DIE to the hash table. Not all DIEs that we
18292 find interesting need to be in the hash table, because we
18293 also have the parent/sibling/child chains; only those that we
18294 might refer to by offset later during partial symbol reading.
18296 For now this means things that might have be the target of a
18297 DW_AT_specification, DW_AT_abstract_origin, or
18298 DW_AT_extension. DW_AT_extension will refer only to
18299 namespaces; DW_AT_abstract_origin refers to functions (and
18300 many things under the function DIE, but we do not recurse
18301 into function DIEs during partial symbol reading) and
18302 possibly variables as well; DW_AT_specification refers to
18303 declarations. Declarations ought to have the DW_AT_declaration
18304 flag. It happens that GCC forgets to put it in sometimes, but
18305 only for functions, not for types.
18307 Adding more things than necessary to the hash table is harmless
18308 except for the performance cost. Adding too few will result in
18309 wasted time in find_partial_die, when we reread the compilation
18310 unit with load_all_dies set. */
18313 || abbrev
->tag
== DW_TAG_constant
18314 || abbrev
->tag
== DW_TAG_subprogram
18315 || abbrev
->tag
== DW_TAG_variable
18316 || abbrev
->tag
== DW_TAG_namespace
18317 || part_die
->is_declaration
)
18321 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18322 to_underlying (part_die
->sect_off
),
18327 /* For some DIEs we want to follow their children (if any). For C
18328 we have no reason to follow the children of structures; for other
18329 languages we have to, so that we can get at method physnames
18330 to infer fully qualified class names, for DW_AT_specification,
18331 and for C++ template arguments. For C++, we also look one level
18332 inside functions to find template arguments (if the name of the
18333 function does not already contain the template arguments).
18335 For Ada, we need to scan the children of subprograms and lexical
18336 blocks as well because Ada allows the definition of nested
18337 entities that could be interesting for the debugger, such as
18338 nested subprograms for instance. */
18339 if (last_die
->has_children
18341 || last_die
->tag
== DW_TAG_namespace
18342 || last_die
->tag
== DW_TAG_module
18343 || last_die
->tag
== DW_TAG_enumeration_type
18344 || (cu
->language
== language_cplus
18345 && last_die
->tag
== DW_TAG_subprogram
18346 && (last_die
->name
== NULL
18347 || strchr (last_die
->name
, '<') == NULL
))
18348 || (cu
->language
!= language_c
18349 && (last_die
->tag
== DW_TAG_class_type
18350 || last_die
->tag
== DW_TAG_interface_type
18351 || last_die
->tag
== DW_TAG_structure_type
18352 || last_die
->tag
== DW_TAG_union_type
))
18353 || (cu
->language
== language_ada
18354 && (last_die
->tag
== DW_TAG_subprogram
18355 || last_die
->tag
== DW_TAG_lexical_block
))))
18358 parent_die
= last_die
;
18362 /* Otherwise we skip to the next sibling, if any. */
18363 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18365 /* Back to the top, do it again. */
18369 partial_die_info::partial_die_info (sect_offset sect_off_
,
18370 struct abbrev_info
*abbrev
)
18371 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18375 /* Read a minimal amount of information into the minimal die structure.
18376 INFO_PTR should point just after the initial uleb128 of a DIE. */
18379 partial_die_info::read (const struct die_reader_specs
*reader
,
18380 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18382 struct dwarf2_cu
*cu
= reader
->cu
;
18383 struct dwarf2_per_objfile
*dwarf2_per_objfile
18384 = cu
->per_cu
->dwarf2_per_objfile
;
18386 int has_low_pc_attr
= 0;
18387 int has_high_pc_attr
= 0;
18388 int high_pc_relative
= 0;
18390 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18392 struct attribute attr
;
18394 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
], info_ptr
);
18396 /* Store the data if it is of an attribute we want to keep in a
18397 partial symbol table. */
18403 case DW_TAG_compile_unit
:
18404 case DW_TAG_partial_unit
:
18405 case DW_TAG_type_unit
:
18406 /* Compilation units have a DW_AT_name that is a filename, not
18407 a source language identifier. */
18408 case DW_TAG_enumeration_type
:
18409 case DW_TAG_enumerator
:
18410 /* These tags always have simple identifiers already; no need
18411 to canonicalize them. */
18412 name
= DW_STRING (&attr
);
18416 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18419 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
18420 &objfile
->per_bfd
->storage_obstack
);
18425 case DW_AT_linkage_name
:
18426 case DW_AT_MIPS_linkage_name
:
18427 /* Note that both forms of linkage name might appear. We
18428 assume they will be the same, and we only store the last
18430 if (cu
->language
== language_ada
)
18431 name
= DW_STRING (&attr
);
18432 linkage_name
= DW_STRING (&attr
);
18435 has_low_pc_attr
= 1;
18436 lowpc
= attr_value_as_address (&attr
);
18438 case DW_AT_high_pc
:
18439 has_high_pc_attr
= 1;
18440 highpc
= attr_value_as_address (&attr
);
18441 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
18442 high_pc_relative
= 1;
18444 case DW_AT_location
:
18445 /* Support the .debug_loc offsets. */
18446 if (attr_form_is_block (&attr
))
18448 d
.locdesc
= DW_BLOCK (&attr
);
18450 else if (attr_form_is_section_offset (&attr
))
18452 dwarf2_complex_location_expr_complaint ();
18456 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18457 "partial symbol information");
18460 case DW_AT_external
:
18461 is_external
= DW_UNSND (&attr
);
18463 case DW_AT_declaration
:
18464 is_declaration
= DW_UNSND (&attr
);
18469 case DW_AT_abstract_origin
:
18470 case DW_AT_specification
:
18471 case DW_AT_extension
:
18472 has_specification
= 1;
18473 spec_offset
= dwarf2_get_ref_die_offset (&attr
);
18474 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18475 || cu
->per_cu
->is_dwz
);
18477 case DW_AT_sibling
:
18478 /* Ignore absolute siblings, they might point outside of
18479 the current compile unit. */
18480 if (attr
.form
== DW_FORM_ref_addr
)
18481 complaint (_("ignoring absolute DW_AT_sibling"));
18484 const gdb_byte
*buffer
= reader
->buffer
;
18485 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
18486 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18488 if (sibling_ptr
< info_ptr
)
18489 complaint (_("DW_AT_sibling points backwards"));
18490 else if (sibling_ptr
> reader
->buffer_end
)
18491 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
18493 sibling
= sibling_ptr
;
18496 case DW_AT_byte_size
:
18499 case DW_AT_const_value
:
18500 has_const_value
= 1;
18502 case DW_AT_calling_convention
:
18503 /* DWARF doesn't provide a way to identify a program's source-level
18504 entry point. DW_AT_calling_convention attributes are only meant
18505 to describe functions' calling conventions.
18507 However, because it's a necessary piece of information in
18508 Fortran, and before DWARF 4 DW_CC_program was the only
18509 piece of debugging information whose definition refers to
18510 a 'main program' at all, several compilers marked Fortran
18511 main programs with DW_CC_program --- even when those
18512 functions use the standard calling conventions.
18514 Although DWARF now specifies a way to provide this
18515 information, we support this practice for backward
18517 if (DW_UNSND (&attr
) == DW_CC_program
18518 && cu
->language
== language_fortran
)
18519 main_subprogram
= 1;
18522 if (DW_UNSND (&attr
) == DW_INL_inlined
18523 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18524 may_be_inlined
= 1;
18528 if (tag
== DW_TAG_imported_unit
)
18530 d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
18531 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18532 || cu
->per_cu
->is_dwz
);
18536 case DW_AT_main_subprogram
:
18537 main_subprogram
= DW_UNSND (&attr
);
18545 if (high_pc_relative
)
18548 if (has_low_pc_attr
&& has_high_pc_attr
)
18550 /* When using the GNU linker, .gnu.linkonce. sections are used to
18551 eliminate duplicate copies of functions and vtables and such.
18552 The linker will arbitrarily choose one and discard the others.
18553 The AT_*_pc values for such functions refer to local labels in
18554 these sections. If the section from that file was discarded, the
18555 labels are not in the output, so the relocs get a value of 0.
18556 If this is a discarded function, mark the pc bounds as invalid,
18557 so that GDB will ignore it. */
18558 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18560 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18561 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18563 complaint (_("DW_AT_low_pc %s is zero "
18564 "for DIE at %s [in module %s]"),
18565 paddress (gdbarch
, lowpc
),
18566 sect_offset_str (sect_off
),
18567 objfile_name (objfile
));
18569 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18570 else if (lowpc
>= highpc
)
18572 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18573 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18575 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18576 "for DIE at %s [in module %s]"),
18577 paddress (gdbarch
, lowpc
),
18578 paddress (gdbarch
, highpc
),
18579 sect_offset_str (sect_off
),
18580 objfile_name (objfile
));
18589 /* Find a cached partial DIE at OFFSET in CU. */
18591 struct partial_die_info
*
18592 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18594 struct partial_die_info
*lookup_die
= NULL
;
18595 struct partial_die_info
part_die (sect_off
);
18597 lookup_die
= ((struct partial_die_info
*)
18598 htab_find_with_hash (partial_dies
, &part_die
,
18599 to_underlying (sect_off
)));
18604 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18605 except in the case of .debug_types DIEs which do not reference
18606 outside their CU (they do however referencing other types via
18607 DW_FORM_ref_sig8). */
18609 static struct partial_die_info
*
18610 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18612 struct dwarf2_per_objfile
*dwarf2_per_objfile
18613 = cu
->per_cu
->dwarf2_per_objfile
;
18614 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18615 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18616 struct partial_die_info
*pd
= NULL
;
18618 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18619 && offset_in_cu_p (&cu
->header
, sect_off
))
18621 pd
= cu
->find_partial_die (sect_off
);
18624 /* We missed recording what we needed.
18625 Load all dies and try again. */
18626 per_cu
= cu
->per_cu
;
18630 /* TUs don't reference other CUs/TUs (except via type signatures). */
18631 if (cu
->per_cu
->is_debug_types
)
18633 error (_("Dwarf Error: Type Unit at offset %s contains"
18634 " external reference to offset %s [in module %s].\n"),
18635 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18636 bfd_get_filename (objfile
->obfd
));
18638 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18639 dwarf2_per_objfile
);
18641 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18642 load_partial_comp_unit (per_cu
);
18644 per_cu
->cu
->last_used
= 0;
18645 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18648 /* If we didn't find it, and not all dies have been loaded,
18649 load them all and try again. */
18651 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18653 per_cu
->load_all_dies
= 1;
18655 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18656 THIS_CU->cu may already be in use. So we can't just free it and
18657 replace its DIEs with the ones we read in. Instead, we leave those
18658 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18659 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18661 load_partial_comp_unit (per_cu
);
18663 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18667 internal_error (__FILE__
, __LINE__
,
18668 _("could not find partial DIE %s "
18669 "in cache [from module %s]\n"),
18670 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18674 /* See if we can figure out if the class lives in a namespace. We do
18675 this by looking for a member function; its demangled name will
18676 contain namespace info, if there is any. */
18679 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18680 struct dwarf2_cu
*cu
)
18682 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18683 what template types look like, because the demangler
18684 frequently doesn't give the same name as the debug info. We
18685 could fix this by only using the demangled name to get the
18686 prefix (but see comment in read_structure_type). */
18688 struct partial_die_info
*real_pdi
;
18689 struct partial_die_info
*child_pdi
;
18691 /* If this DIE (this DIE's specification, if any) has a parent, then
18692 we should not do this. We'll prepend the parent's fully qualified
18693 name when we create the partial symbol. */
18695 real_pdi
= struct_pdi
;
18696 while (real_pdi
->has_specification
)
18697 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
18698 real_pdi
->spec_is_dwz
, cu
);
18700 if (real_pdi
->die_parent
!= NULL
)
18703 for (child_pdi
= struct_pdi
->die_child
;
18705 child_pdi
= child_pdi
->die_sibling
)
18707 if (child_pdi
->tag
== DW_TAG_subprogram
18708 && child_pdi
->linkage_name
!= NULL
)
18710 char *actual_class_name
18711 = language_class_name_from_physname (cu
->language_defn
,
18712 child_pdi
->linkage_name
);
18713 if (actual_class_name
!= NULL
)
18715 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18718 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
18720 strlen (actual_class_name
)));
18721 xfree (actual_class_name
);
18729 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18731 /* Once we've fixed up a die, there's no point in doing so again.
18732 This also avoids a memory leak if we were to call
18733 guess_partial_die_structure_name multiple times. */
18737 /* If we found a reference attribute and the DIE has no name, try
18738 to find a name in the referred to DIE. */
18740 if (name
== NULL
&& has_specification
)
18742 struct partial_die_info
*spec_die
;
18744 spec_die
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18746 spec_die
->fixup (cu
);
18748 if (spec_die
->name
)
18750 name
= spec_die
->name
;
18752 /* Copy DW_AT_external attribute if it is set. */
18753 if (spec_die
->is_external
)
18754 is_external
= spec_die
->is_external
;
18758 /* Set default names for some unnamed DIEs. */
18760 if (name
== NULL
&& tag
== DW_TAG_namespace
)
18761 name
= CP_ANONYMOUS_NAMESPACE_STR
;
18763 /* If there is no parent die to provide a namespace, and there are
18764 children, see if we can determine the namespace from their linkage
18766 if (cu
->language
== language_cplus
18767 && !VEC_empty (dwarf2_section_info_def
,
18768 cu
->per_cu
->dwarf2_per_objfile
->types
)
18769 && die_parent
== NULL
18771 && (tag
== DW_TAG_class_type
18772 || tag
== DW_TAG_structure_type
18773 || tag
== DW_TAG_union_type
))
18774 guess_partial_die_structure_name (this, cu
);
18776 /* GCC might emit a nameless struct or union that has a linkage
18777 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18779 && (tag
== DW_TAG_class_type
18780 || tag
== DW_TAG_interface_type
18781 || tag
== DW_TAG_structure_type
18782 || tag
== DW_TAG_union_type
)
18783 && linkage_name
!= NULL
)
18787 demangled
= gdb_demangle (linkage_name
, DMGL_TYPES
);
18792 /* Strip any leading namespaces/classes, keep only the base name.
18793 DW_AT_name for named DIEs does not contain the prefixes. */
18794 base
= strrchr (demangled
, ':');
18795 if (base
&& base
> demangled
&& base
[-1] == ':')
18800 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18803 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
18804 base
, strlen (base
)));
18812 /* Read an attribute value described by an attribute form. */
18814 static const gdb_byte
*
18815 read_attribute_value (const struct die_reader_specs
*reader
,
18816 struct attribute
*attr
, unsigned form
,
18817 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
18819 struct dwarf2_cu
*cu
= reader
->cu
;
18820 struct dwarf2_per_objfile
*dwarf2_per_objfile
18821 = cu
->per_cu
->dwarf2_per_objfile
;
18822 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18823 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18824 bfd
*abfd
= reader
->abfd
;
18825 struct comp_unit_head
*cu_header
= &cu
->header
;
18826 unsigned int bytes_read
;
18827 struct dwarf_block
*blk
;
18829 attr
->form
= (enum dwarf_form
) form
;
18832 case DW_FORM_ref_addr
:
18833 if (cu
->header
.version
== 2)
18834 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18836 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
18837 &cu
->header
, &bytes_read
);
18838 info_ptr
+= bytes_read
;
18840 case DW_FORM_GNU_ref_alt
:
18841 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18842 info_ptr
+= bytes_read
;
18845 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18846 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
18847 info_ptr
+= bytes_read
;
18849 case DW_FORM_block2
:
18850 blk
= dwarf_alloc_block (cu
);
18851 blk
->size
= read_2_bytes (abfd
, info_ptr
);
18853 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18854 info_ptr
+= blk
->size
;
18855 DW_BLOCK (attr
) = blk
;
18857 case DW_FORM_block4
:
18858 blk
= dwarf_alloc_block (cu
);
18859 blk
->size
= read_4_bytes (abfd
, info_ptr
);
18861 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18862 info_ptr
+= blk
->size
;
18863 DW_BLOCK (attr
) = blk
;
18865 case DW_FORM_data2
:
18866 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
18869 case DW_FORM_data4
:
18870 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
18873 case DW_FORM_data8
:
18874 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
18877 case DW_FORM_data16
:
18878 blk
= dwarf_alloc_block (cu
);
18880 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
18882 DW_BLOCK (attr
) = blk
;
18884 case DW_FORM_sec_offset
:
18885 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18886 info_ptr
+= bytes_read
;
18888 case DW_FORM_string
:
18889 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
18890 DW_STRING_IS_CANONICAL (attr
) = 0;
18891 info_ptr
+= bytes_read
;
18894 if (!cu
->per_cu
->is_dwz
)
18896 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
18897 abfd
, info_ptr
, cu_header
,
18899 DW_STRING_IS_CANONICAL (attr
) = 0;
18900 info_ptr
+= bytes_read
;
18904 case DW_FORM_line_strp
:
18905 if (!cu
->per_cu
->is_dwz
)
18907 DW_STRING (attr
) = read_indirect_line_string (dwarf2_per_objfile
,
18909 cu_header
, &bytes_read
);
18910 DW_STRING_IS_CANONICAL (attr
) = 0;
18911 info_ptr
+= bytes_read
;
18915 case DW_FORM_GNU_strp_alt
:
18917 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
18918 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
18921 DW_STRING (attr
) = read_indirect_string_from_dwz (objfile
,
18923 DW_STRING_IS_CANONICAL (attr
) = 0;
18924 info_ptr
+= bytes_read
;
18927 case DW_FORM_exprloc
:
18928 case DW_FORM_block
:
18929 blk
= dwarf_alloc_block (cu
);
18930 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18931 info_ptr
+= bytes_read
;
18932 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18933 info_ptr
+= blk
->size
;
18934 DW_BLOCK (attr
) = blk
;
18936 case DW_FORM_block1
:
18937 blk
= dwarf_alloc_block (cu
);
18938 blk
->size
= read_1_byte (abfd
, info_ptr
);
18940 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18941 info_ptr
+= blk
->size
;
18942 DW_BLOCK (attr
) = blk
;
18944 case DW_FORM_data1
:
18945 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
18949 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
18952 case DW_FORM_flag_present
:
18953 DW_UNSND (attr
) = 1;
18955 case DW_FORM_sdata
:
18956 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
18957 info_ptr
+= bytes_read
;
18959 case DW_FORM_udata
:
18960 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18961 info_ptr
+= bytes_read
;
18964 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18965 + read_1_byte (abfd
, info_ptr
));
18969 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18970 + read_2_bytes (abfd
, info_ptr
));
18974 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18975 + read_4_bytes (abfd
, info_ptr
));
18979 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18980 + read_8_bytes (abfd
, info_ptr
));
18983 case DW_FORM_ref_sig8
:
18984 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
18987 case DW_FORM_ref_udata
:
18988 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18989 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
18990 info_ptr
+= bytes_read
;
18992 case DW_FORM_indirect
:
18993 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18994 info_ptr
+= bytes_read
;
18995 if (form
== DW_FORM_implicit_const
)
18997 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
18998 info_ptr
+= bytes_read
;
19000 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19003 case DW_FORM_implicit_const
:
19004 DW_SND (attr
) = implicit_const
;
19006 case DW_FORM_GNU_addr_index
:
19007 if (reader
->dwo_file
== NULL
)
19009 /* For now flag a hard error.
19010 Later we can turn this into a complaint. */
19011 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19012 dwarf_form_name (form
),
19013 bfd_get_filename (abfd
));
19015 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
19016 info_ptr
+= bytes_read
;
19018 case DW_FORM_GNU_str_index
:
19019 if (reader
->dwo_file
== NULL
)
19021 /* For now flag a hard error.
19022 Later we can turn this into a complaint if warranted. */
19023 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19024 dwarf_form_name (form
),
19025 bfd_get_filename (abfd
));
19028 ULONGEST str_index
=
19029 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19031 DW_STRING (attr
) = read_str_index (reader
, str_index
);
19032 DW_STRING_IS_CANONICAL (attr
) = 0;
19033 info_ptr
+= bytes_read
;
19037 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19038 dwarf_form_name (form
),
19039 bfd_get_filename (abfd
));
19043 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
19044 attr
->form
= DW_FORM_GNU_ref_alt
;
19046 /* We have seen instances where the compiler tried to emit a byte
19047 size attribute of -1 which ended up being encoded as an unsigned
19048 0xffffffff. Although 0xffffffff is technically a valid size value,
19049 an object of this size seems pretty unlikely so we can relatively
19050 safely treat these cases as if the size attribute was invalid and
19051 treat them as zero by default. */
19052 if (attr
->name
== DW_AT_byte_size
19053 && form
== DW_FORM_data4
19054 && DW_UNSND (attr
) >= 0xffffffff)
19057 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19058 hex_string (DW_UNSND (attr
)));
19059 DW_UNSND (attr
) = 0;
19065 /* Read an attribute described by an abbreviated attribute. */
19067 static const gdb_byte
*
19068 read_attribute (const struct die_reader_specs
*reader
,
19069 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19070 const gdb_byte
*info_ptr
)
19072 attr
->name
= abbrev
->name
;
19073 return read_attribute_value (reader
, attr
, abbrev
->form
,
19074 abbrev
->implicit_const
, info_ptr
);
19077 /* Read dwarf information from a buffer. */
19079 static unsigned int
19080 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
19082 return bfd_get_8 (abfd
, buf
);
19086 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
19088 return bfd_get_signed_8 (abfd
, buf
);
19091 static unsigned int
19092 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19094 return bfd_get_16 (abfd
, buf
);
19098 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19100 return bfd_get_signed_16 (abfd
, buf
);
19103 static unsigned int
19104 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19106 return bfd_get_32 (abfd
, buf
);
19110 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19112 return bfd_get_signed_32 (abfd
, buf
);
19116 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19118 return bfd_get_64 (abfd
, buf
);
19122 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
19123 unsigned int *bytes_read
)
19125 struct comp_unit_head
*cu_header
= &cu
->header
;
19126 CORE_ADDR retval
= 0;
19128 if (cu_header
->signed_addr_p
)
19130 switch (cu_header
->addr_size
)
19133 retval
= bfd_get_signed_16 (abfd
, buf
);
19136 retval
= bfd_get_signed_32 (abfd
, buf
);
19139 retval
= bfd_get_signed_64 (abfd
, buf
);
19142 internal_error (__FILE__
, __LINE__
,
19143 _("read_address: bad switch, signed [in module %s]"),
19144 bfd_get_filename (abfd
));
19149 switch (cu_header
->addr_size
)
19152 retval
= bfd_get_16 (abfd
, buf
);
19155 retval
= bfd_get_32 (abfd
, buf
);
19158 retval
= bfd_get_64 (abfd
, buf
);
19161 internal_error (__FILE__
, __LINE__
,
19162 _("read_address: bad switch, "
19163 "unsigned [in module %s]"),
19164 bfd_get_filename (abfd
));
19168 *bytes_read
= cu_header
->addr_size
;
19172 /* Read the initial length from a section. The (draft) DWARF 3
19173 specification allows the initial length to take up either 4 bytes
19174 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
19175 bytes describe the length and all offsets will be 8 bytes in length
19178 An older, non-standard 64-bit format is also handled by this
19179 function. The older format in question stores the initial length
19180 as an 8-byte quantity without an escape value. Lengths greater
19181 than 2^32 aren't very common which means that the initial 4 bytes
19182 is almost always zero. Since a length value of zero doesn't make
19183 sense for the 32-bit format, this initial zero can be considered to
19184 be an escape value which indicates the presence of the older 64-bit
19185 format. As written, the code can't detect (old format) lengths
19186 greater than 4GB. If it becomes necessary to handle lengths
19187 somewhat larger than 4GB, we could allow other small values (such
19188 as the non-sensical values of 1, 2, and 3) to also be used as
19189 escape values indicating the presence of the old format.
19191 The value returned via bytes_read should be used to increment the
19192 relevant pointer after calling read_initial_length().
19194 [ Note: read_initial_length() and read_offset() are based on the
19195 document entitled "DWARF Debugging Information Format", revision
19196 3, draft 8, dated November 19, 2001. This document was obtained
19199 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
19201 This document is only a draft and is subject to change. (So beware.)
19203 Details regarding the older, non-standard 64-bit format were
19204 determined empirically by examining 64-bit ELF files produced by
19205 the SGI toolchain on an IRIX 6.5 machine.
19207 - Kevin, July 16, 2002
19211 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
19213 LONGEST length
= bfd_get_32 (abfd
, buf
);
19215 if (length
== 0xffffffff)
19217 length
= bfd_get_64 (abfd
, buf
+ 4);
19220 else if (length
== 0)
19222 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
19223 length
= bfd_get_64 (abfd
, buf
);
19234 /* Cover function for read_initial_length.
19235 Returns the length of the object at BUF, and stores the size of the
19236 initial length in *BYTES_READ and stores the size that offsets will be in
19238 If the initial length size is not equivalent to that specified in
19239 CU_HEADER then issue a complaint.
19240 This is useful when reading non-comp-unit headers. */
19243 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
19244 const struct comp_unit_head
*cu_header
,
19245 unsigned int *bytes_read
,
19246 unsigned int *offset_size
)
19248 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
19250 gdb_assert (cu_header
->initial_length_size
== 4
19251 || cu_header
->initial_length_size
== 8
19252 || cu_header
->initial_length_size
== 12);
19254 if (cu_header
->initial_length_size
!= *bytes_read
)
19255 complaint (_("intermixed 32-bit and 64-bit DWARF sections"));
19257 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
19261 /* Read an offset from the data stream. The size of the offset is
19262 given by cu_header->offset_size. */
19265 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
19266 const struct comp_unit_head
*cu_header
,
19267 unsigned int *bytes_read
)
19269 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
19271 *bytes_read
= cu_header
->offset_size
;
19275 /* Read an offset from the data stream. */
19278 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
19280 LONGEST retval
= 0;
19282 switch (offset_size
)
19285 retval
= bfd_get_32 (abfd
, buf
);
19288 retval
= bfd_get_64 (abfd
, buf
);
19291 internal_error (__FILE__
, __LINE__
,
19292 _("read_offset_1: bad switch [in module %s]"),
19293 bfd_get_filename (abfd
));
19299 static const gdb_byte
*
19300 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
19302 /* If the size of a host char is 8 bits, we can return a pointer
19303 to the buffer, otherwise we have to copy the data to a buffer
19304 allocated on the temporary obstack. */
19305 gdb_assert (HOST_CHAR_BIT
== 8);
19309 static const char *
19310 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
19311 unsigned int *bytes_read_ptr
)
19313 /* If the size of a host char is 8 bits, we can return a pointer
19314 to the string, otherwise we have to copy the string to a buffer
19315 allocated on the temporary obstack. */
19316 gdb_assert (HOST_CHAR_BIT
== 8);
19319 *bytes_read_ptr
= 1;
19322 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
19323 return (const char *) buf
;
19326 /* Return pointer to string at section SECT offset STR_OFFSET with error
19327 reporting strings FORM_NAME and SECT_NAME. */
19329 static const char *
19330 read_indirect_string_at_offset_from (struct objfile
*objfile
,
19331 bfd
*abfd
, LONGEST str_offset
,
19332 struct dwarf2_section_info
*sect
,
19333 const char *form_name
,
19334 const char *sect_name
)
19336 dwarf2_read_section (objfile
, sect
);
19337 if (sect
->buffer
== NULL
)
19338 error (_("%s used without %s section [in module %s]"),
19339 form_name
, sect_name
, bfd_get_filename (abfd
));
19340 if (str_offset
>= sect
->size
)
19341 error (_("%s pointing outside of %s section [in module %s]"),
19342 form_name
, sect_name
, bfd_get_filename (abfd
));
19343 gdb_assert (HOST_CHAR_BIT
== 8);
19344 if (sect
->buffer
[str_offset
] == '\0')
19346 return (const char *) (sect
->buffer
+ str_offset
);
19349 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19351 static const char *
19352 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19353 bfd
*abfd
, LONGEST str_offset
)
19355 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19357 &dwarf2_per_objfile
->str
,
19358 "DW_FORM_strp", ".debug_str");
19361 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
19363 static const char *
19364 read_indirect_line_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19365 bfd
*abfd
, LONGEST str_offset
)
19367 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19369 &dwarf2_per_objfile
->line_str
,
19370 "DW_FORM_line_strp",
19371 ".debug_line_str");
19374 /* Read a string at offset STR_OFFSET in the .debug_str section from
19375 the .dwz file DWZ. Throw an error if the offset is too large. If
19376 the string consists of a single NUL byte, return NULL; otherwise
19377 return a pointer to the string. */
19379 static const char *
19380 read_indirect_string_from_dwz (struct objfile
*objfile
, struct dwz_file
*dwz
,
19381 LONGEST str_offset
)
19383 dwarf2_read_section (objfile
, &dwz
->str
);
19385 if (dwz
->str
.buffer
== NULL
)
19386 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
19387 "section [in module %s]"),
19388 bfd_get_filename (dwz
->dwz_bfd
));
19389 if (str_offset
>= dwz
->str
.size
)
19390 error (_("DW_FORM_GNU_strp_alt pointing outside of "
19391 ".debug_str section [in module %s]"),
19392 bfd_get_filename (dwz
->dwz_bfd
));
19393 gdb_assert (HOST_CHAR_BIT
== 8);
19394 if (dwz
->str
.buffer
[str_offset
] == '\0')
19396 return (const char *) (dwz
->str
.buffer
+ str_offset
);
19399 /* Return pointer to string at .debug_str offset as read from BUF.
19400 BUF is assumed to be in a compilation unit described by CU_HEADER.
19401 Return *BYTES_READ_PTR count of bytes read from BUF. */
19403 static const char *
19404 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19405 const gdb_byte
*buf
,
19406 const struct comp_unit_head
*cu_header
,
19407 unsigned int *bytes_read_ptr
)
19409 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19411 return read_indirect_string_at_offset (dwarf2_per_objfile
, abfd
, str_offset
);
19414 /* Return pointer to string at .debug_line_str offset as read from BUF.
19415 BUF is assumed to be in a compilation unit described by CU_HEADER.
19416 Return *BYTES_READ_PTR count of bytes read from BUF. */
19418 static const char *
19419 read_indirect_line_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19420 bfd
*abfd
, const gdb_byte
*buf
,
19421 const struct comp_unit_head
*cu_header
,
19422 unsigned int *bytes_read_ptr
)
19424 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19426 return read_indirect_line_string_at_offset (dwarf2_per_objfile
, abfd
,
19431 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19432 unsigned int *bytes_read_ptr
)
19435 unsigned int num_read
;
19437 unsigned char byte
;
19444 byte
= bfd_get_8 (abfd
, buf
);
19447 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19448 if ((byte
& 128) == 0)
19454 *bytes_read_ptr
= num_read
;
19459 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19460 unsigned int *bytes_read_ptr
)
19463 int shift
, num_read
;
19464 unsigned char byte
;
19471 byte
= bfd_get_8 (abfd
, buf
);
19474 result
|= ((LONGEST
) (byte
& 127) << shift
);
19476 if ((byte
& 128) == 0)
19481 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
19482 result
|= -(((LONGEST
) 1) << shift
);
19483 *bytes_read_ptr
= num_read
;
19487 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19488 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
19489 ADDR_SIZE is the size of addresses from the CU header. */
19492 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19493 unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
19495 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19496 bfd
*abfd
= objfile
->obfd
;
19497 const gdb_byte
*info_ptr
;
19499 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
19500 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19501 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19502 objfile_name (objfile
));
19503 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
19504 error (_("DW_FORM_addr_index pointing outside of "
19505 ".debug_addr section [in module %s]"),
19506 objfile_name (objfile
));
19507 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19508 + addr_base
+ addr_index
* addr_size
);
19509 if (addr_size
== 4)
19510 return bfd_get_32 (abfd
, info_ptr
);
19512 return bfd_get_64 (abfd
, info_ptr
);
19515 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19518 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19520 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19521 cu
->addr_base
, cu
->header
.addr_size
);
19524 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19527 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19528 unsigned int *bytes_read
)
19530 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19531 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19533 return read_addr_index (cu
, addr_index
);
19536 /* Data structure to pass results from dwarf2_read_addr_index_reader
19537 back to dwarf2_read_addr_index. */
19539 struct dwarf2_read_addr_index_data
19541 ULONGEST addr_base
;
19545 /* die_reader_func for dwarf2_read_addr_index. */
19548 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
19549 const gdb_byte
*info_ptr
,
19550 struct die_info
*comp_unit_die
,
19554 struct dwarf2_cu
*cu
= reader
->cu
;
19555 struct dwarf2_read_addr_index_data
*aidata
=
19556 (struct dwarf2_read_addr_index_data
*) data
;
19558 aidata
->addr_base
= cu
->addr_base
;
19559 aidata
->addr_size
= cu
->header
.addr_size
;
19562 /* Given an index in .debug_addr, fetch the value.
19563 NOTE: This can be called during dwarf expression evaluation,
19564 long after the debug information has been read, and thus per_cu->cu
19565 may no longer exist. */
19568 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
19569 unsigned int addr_index
)
19571 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19572 struct dwarf2_cu
*cu
= per_cu
->cu
;
19573 ULONGEST addr_base
;
19576 /* We need addr_base and addr_size.
19577 If we don't have PER_CU->cu, we have to get it.
19578 Nasty, but the alternative is storing the needed info in PER_CU,
19579 which at this point doesn't seem justified: it's not clear how frequently
19580 it would get used and it would increase the size of every PER_CU.
19581 Entry points like dwarf2_per_cu_addr_size do a similar thing
19582 so we're not in uncharted territory here.
19583 Alas we need to be a bit more complicated as addr_base is contained
19586 We don't need to read the entire CU(/TU).
19587 We just need the header and top level die.
19589 IWBN to use the aging mechanism to let us lazily later discard the CU.
19590 For now we skip this optimization. */
19594 addr_base
= cu
->addr_base
;
19595 addr_size
= cu
->header
.addr_size
;
19599 struct dwarf2_read_addr_index_data aidata
;
19601 /* Note: We can't use init_cutu_and_read_dies_simple here,
19602 we need addr_base. */
19603 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0, false,
19604 dwarf2_read_addr_index_reader
, &aidata
);
19605 addr_base
= aidata
.addr_base
;
19606 addr_size
= aidata
.addr_size
;
19609 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19613 /* Given a DW_FORM_GNU_str_index, fetch the string.
19614 This is only used by the Fission support. */
19616 static const char *
19617 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19619 struct dwarf2_cu
*cu
= reader
->cu
;
19620 struct dwarf2_per_objfile
*dwarf2_per_objfile
19621 = cu
->per_cu
->dwarf2_per_objfile
;
19622 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19623 const char *objf_name
= objfile_name (objfile
);
19624 bfd
*abfd
= objfile
->obfd
;
19625 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
19626 struct dwarf2_section_info
*str_offsets_section
=
19627 &reader
->dwo_file
->sections
.str_offsets
;
19628 const gdb_byte
*info_ptr
;
19629 ULONGEST str_offset
;
19630 static const char form_name
[] = "DW_FORM_GNU_str_index";
19632 dwarf2_read_section (objfile
, str_section
);
19633 dwarf2_read_section (objfile
, str_offsets_section
);
19634 if (str_section
->buffer
== NULL
)
19635 error (_("%s used without .debug_str.dwo section"
19636 " in CU at offset %s [in module %s]"),
19637 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19638 if (str_offsets_section
->buffer
== NULL
)
19639 error (_("%s used without .debug_str_offsets.dwo section"
19640 " in CU at offset %s [in module %s]"),
19641 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19642 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
19643 error (_("%s pointing outside of .debug_str_offsets.dwo"
19644 " section in CU at offset %s [in module %s]"),
19645 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19646 info_ptr
= (str_offsets_section
->buffer
19647 + str_index
* cu
->header
.offset_size
);
19648 if (cu
->header
.offset_size
== 4)
19649 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19651 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19652 if (str_offset
>= str_section
->size
)
19653 error (_("Offset from %s pointing outside of"
19654 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19655 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19656 return (const char *) (str_section
->buffer
+ str_offset
);
19659 /* Return the length of an LEB128 number in BUF. */
19662 leb128_size (const gdb_byte
*buf
)
19664 const gdb_byte
*begin
= buf
;
19670 if ((byte
& 128) == 0)
19671 return buf
- begin
;
19676 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19685 cu
->language
= language_c
;
19688 case DW_LANG_C_plus_plus
:
19689 case DW_LANG_C_plus_plus_11
:
19690 case DW_LANG_C_plus_plus_14
:
19691 cu
->language
= language_cplus
;
19694 cu
->language
= language_d
;
19696 case DW_LANG_Fortran77
:
19697 case DW_LANG_Fortran90
:
19698 case DW_LANG_Fortran95
:
19699 case DW_LANG_Fortran03
:
19700 case DW_LANG_Fortran08
:
19701 cu
->language
= language_fortran
;
19704 cu
->language
= language_go
;
19706 case DW_LANG_Mips_Assembler
:
19707 cu
->language
= language_asm
;
19709 case DW_LANG_Ada83
:
19710 case DW_LANG_Ada95
:
19711 cu
->language
= language_ada
;
19713 case DW_LANG_Modula2
:
19714 cu
->language
= language_m2
;
19716 case DW_LANG_Pascal83
:
19717 cu
->language
= language_pascal
;
19720 cu
->language
= language_objc
;
19723 case DW_LANG_Rust_old
:
19724 cu
->language
= language_rust
;
19726 case DW_LANG_Cobol74
:
19727 case DW_LANG_Cobol85
:
19729 cu
->language
= language_minimal
;
19732 cu
->language_defn
= language_def (cu
->language
);
19735 /* Return the named attribute or NULL if not there. */
19737 static struct attribute
*
19738 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19743 struct attribute
*spec
= NULL
;
19745 for (i
= 0; i
< die
->num_attrs
; ++i
)
19747 if (die
->attrs
[i
].name
== name
)
19748 return &die
->attrs
[i
];
19749 if (die
->attrs
[i
].name
== DW_AT_specification
19750 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19751 spec
= &die
->attrs
[i
];
19757 die
= follow_die_ref (die
, spec
, &cu
);
19763 /* Return the named attribute or NULL if not there,
19764 but do not follow DW_AT_specification, etc.
19765 This is for use in contexts where we're reading .debug_types dies.
19766 Following DW_AT_specification, DW_AT_abstract_origin will take us
19767 back up the chain, and we want to go down. */
19769 static struct attribute
*
19770 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
19774 for (i
= 0; i
< die
->num_attrs
; ++i
)
19775 if (die
->attrs
[i
].name
== name
)
19776 return &die
->attrs
[i
];
19781 /* Return the string associated with a string-typed attribute, or NULL if it
19782 is either not found or is of an incorrect type. */
19784 static const char *
19785 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19787 struct attribute
*attr
;
19788 const char *str
= NULL
;
19790 attr
= dwarf2_attr (die
, name
, cu
);
19794 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
19795 || attr
->form
== DW_FORM_string
19796 || attr
->form
== DW_FORM_GNU_str_index
19797 || attr
->form
== DW_FORM_GNU_strp_alt
)
19798 str
= DW_STRING (attr
);
19800 complaint (_("string type expected for attribute %s for "
19801 "DIE at %s in module %s"),
19802 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
19803 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
19809 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19810 and holds a non-zero value. This function should only be used for
19811 DW_FORM_flag or DW_FORM_flag_present attributes. */
19814 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19816 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19818 return (attr
&& DW_UNSND (attr
));
19822 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19824 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19825 which value is non-zero. However, we have to be careful with
19826 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19827 (via dwarf2_flag_true_p) follows this attribute. So we may
19828 end up accidently finding a declaration attribute that belongs
19829 to a different DIE referenced by the specification attribute,
19830 even though the given DIE does not have a declaration attribute. */
19831 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19832 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19835 /* Return the die giving the specification for DIE, if there is
19836 one. *SPEC_CU is the CU containing DIE on input, and the CU
19837 containing the return value on output. If there is no
19838 specification, but there is an abstract origin, that is
19841 static struct die_info
*
19842 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19844 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19847 if (spec_attr
== NULL
)
19848 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19850 if (spec_attr
== NULL
)
19853 return follow_die_ref (die
, spec_attr
, spec_cu
);
19856 /* Stub for free_line_header to match void * callback types. */
19859 free_line_header_voidp (void *arg
)
19861 struct line_header
*lh
= (struct line_header
*) arg
;
19867 line_header::add_include_dir (const char *include_dir
)
19869 if (dwarf_line_debug
>= 2)
19870 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
19871 include_dirs
.size () + 1, include_dir
);
19873 include_dirs
.push_back (include_dir
);
19877 line_header::add_file_name (const char *name
,
19879 unsigned int mod_time
,
19880 unsigned int length
)
19882 if (dwarf_line_debug
>= 2)
19883 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
19884 (unsigned) file_names
.size () + 1, name
);
19886 file_names
.emplace_back (name
, d_index
, mod_time
, length
);
19889 /* A convenience function to find the proper .debug_line section for a CU. */
19891 static struct dwarf2_section_info
*
19892 get_debug_line_section (struct dwarf2_cu
*cu
)
19894 struct dwarf2_section_info
*section
;
19895 struct dwarf2_per_objfile
*dwarf2_per_objfile
19896 = cu
->per_cu
->dwarf2_per_objfile
;
19898 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
19900 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19901 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
19902 else if (cu
->per_cu
->is_dwz
)
19904 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19906 section
= &dwz
->line
;
19909 section
= &dwarf2_per_objfile
->line
;
19914 /* Read directory or file name entry format, starting with byte of
19915 format count entries, ULEB128 pairs of entry formats, ULEB128 of
19916 entries count and the entries themselves in the described entry
19920 read_formatted_entries (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19921 bfd
*abfd
, const gdb_byte
**bufp
,
19922 struct line_header
*lh
,
19923 const struct comp_unit_head
*cu_header
,
19924 void (*callback
) (struct line_header
*lh
,
19927 unsigned int mod_time
,
19928 unsigned int length
))
19930 gdb_byte format_count
, formati
;
19931 ULONGEST data_count
, datai
;
19932 const gdb_byte
*buf
= *bufp
;
19933 const gdb_byte
*format_header_data
;
19934 unsigned int bytes_read
;
19936 format_count
= read_1_byte (abfd
, buf
);
19938 format_header_data
= buf
;
19939 for (formati
= 0; formati
< format_count
; formati
++)
19941 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
19943 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
19947 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
19949 for (datai
= 0; datai
< data_count
; datai
++)
19951 const gdb_byte
*format
= format_header_data
;
19952 struct file_entry fe
;
19954 for (formati
= 0; formati
< format_count
; formati
++)
19956 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
19957 format
+= bytes_read
;
19959 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
19960 format
+= bytes_read
;
19962 gdb::optional
<const char *> string
;
19963 gdb::optional
<unsigned int> uint
;
19967 case DW_FORM_string
:
19968 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
19972 case DW_FORM_line_strp
:
19973 string
.emplace (read_indirect_line_string (dwarf2_per_objfile
,
19980 case DW_FORM_data1
:
19981 uint
.emplace (read_1_byte (abfd
, buf
));
19985 case DW_FORM_data2
:
19986 uint
.emplace (read_2_bytes (abfd
, buf
));
19990 case DW_FORM_data4
:
19991 uint
.emplace (read_4_bytes (abfd
, buf
));
19995 case DW_FORM_data8
:
19996 uint
.emplace (read_8_bytes (abfd
, buf
));
20000 case DW_FORM_udata
:
20001 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
20005 case DW_FORM_block
:
20006 /* It is valid only for DW_LNCT_timestamp which is ignored by
20011 switch (content_type
)
20014 if (string
.has_value ())
20017 case DW_LNCT_directory_index
:
20018 if (uint
.has_value ())
20019 fe
.d_index
= (dir_index
) *uint
;
20021 case DW_LNCT_timestamp
:
20022 if (uint
.has_value ())
20023 fe
.mod_time
= *uint
;
20026 if (uint
.has_value ())
20032 complaint (_("Unknown format content type %s"),
20033 pulongest (content_type
));
20037 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
20043 /* Read the statement program header starting at OFFSET in
20044 .debug_line, or .debug_line.dwo. Return a pointer
20045 to a struct line_header, allocated using xmalloc.
20046 Returns NULL if there is a problem reading the header, e.g., if it
20047 has a version we don't understand.
20049 NOTE: the strings in the include directory and file name tables of
20050 the returned object point into the dwarf line section buffer,
20051 and must not be freed. */
20053 static line_header_up
20054 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
20056 const gdb_byte
*line_ptr
;
20057 unsigned int bytes_read
, offset_size
;
20059 const char *cur_dir
, *cur_file
;
20060 struct dwarf2_section_info
*section
;
20062 struct dwarf2_per_objfile
*dwarf2_per_objfile
20063 = cu
->per_cu
->dwarf2_per_objfile
;
20065 section
= get_debug_line_section (cu
);
20066 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
20067 if (section
->buffer
== NULL
)
20069 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20070 complaint (_("missing .debug_line.dwo section"));
20072 complaint (_("missing .debug_line section"));
20076 /* We can't do this until we know the section is non-empty.
20077 Only then do we know we have such a section. */
20078 abfd
= get_section_bfd_owner (section
);
20080 /* Make sure that at least there's room for the total_length field.
20081 That could be 12 bytes long, but we're just going to fudge that. */
20082 if (to_underlying (sect_off
) + 4 >= section
->size
)
20084 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20088 line_header_up
lh (new line_header ());
20090 lh
->sect_off
= sect_off
;
20091 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
20093 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
20095 /* Read in the header. */
20097 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
20098 &bytes_read
, &offset_size
);
20099 line_ptr
+= bytes_read
;
20100 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
20102 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20105 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
20106 lh
->version
= read_2_bytes (abfd
, line_ptr
);
20108 if (lh
->version
> 5)
20110 /* This is a version we don't understand. The format could have
20111 changed in ways we don't handle properly so just punt. */
20112 complaint (_("unsupported version in .debug_line section"));
20115 if (lh
->version
>= 5)
20117 gdb_byte segment_selector_size
;
20119 /* Skip address size. */
20120 read_1_byte (abfd
, line_ptr
);
20123 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
20125 if (segment_selector_size
!= 0)
20127 complaint (_("unsupported segment selector size %u "
20128 "in .debug_line section"),
20129 segment_selector_size
);
20133 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
20134 line_ptr
+= offset_size
;
20135 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
20137 if (lh
->version
>= 4)
20139 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
20143 lh
->maximum_ops_per_instruction
= 1;
20145 if (lh
->maximum_ops_per_instruction
== 0)
20147 lh
->maximum_ops_per_instruction
= 1;
20148 complaint (_("invalid maximum_ops_per_instruction "
20149 "in `.debug_line' section"));
20152 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
20154 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
20156 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
20158 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
20160 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
20162 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
20163 for (i
= 1; i
< lh
->opcode_base
; ++i
)
20165 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
20169 if (lh
->version
>= 5)
20171 /* Read directory table. */
20172 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20174 [] (struct line_header
*lh
, const char *name
,
20175 dir_index d_index
, unsigned int mod_time
,
20176 unsigned int length
)
20178 lh
->add_include_dir (name
);
20181 /* Read file name table. */
20182 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20184 [] (struct line_header
*lh
, const char *name
,
20185 dir_index d_index
, unsigned int mod_time
,
20186 unsigned int length
)
20188 lh
->add_file_name (name
, d_index
, mod_time
, length
);
20193 /* Read directory table. */
20194 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20196 line_ptr
+= bytes_read
;
20197 lh
->add_include_dir (cur_dir
);
20199 line_ptr
+= bytes_read
;
20201 /* Read file name table. */
20202 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20204 unsigned int mod_time
, length
;
20207 line_ptr
+= bytes_read
;
20208 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20209 line_ptr
+= bytes_read
;
20210 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20211 line_ptr
+= bytes_read
;
20212 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20213 line_ptr
+= bytes_read
;
20215 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
20217 line_ptr
+= bytes_read
;
20219 lh
->statement_program_start
= line_ptr
;
20221 if (line_ptr
> (section
->buffer
+ section
->size
))
20222 complaint (_("line number info header doesn't "
20223 "fit in `.debug_line' section"));
20228 /* Subroutine of dwarf_decode_lines to simplify it.
20229 Return the file name of the psymtab for included file FILE_INDEX
20230 in line header LH of PST.
20231 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20232 If space for the result is malloc'd, *NAME_HOLDER will be set.
20233 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
20235 static const char *
20236 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
20237 const struct partial_symtab
*pst
,
20238 const char *comp_dir
,
20239 gdb::unique_xmalloc_ptr
<char> *name_holder
)
20241 const file_entry
&fe
= lh
->file_names
[file_index
];
20242 const char *include_name
= fe
.name
;
20243 const char *include_name_to_compare
= include_name
;
20244 const char *pst_filename
;
20247 const char *dir_name
= fe
.include_dir (lh
);
20249 gdb::unique_xmalloc_ptr
<char> hold_compare
;
20250 if (!IS_ABSOLUTE_PATH (include_name
)
20251 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
20253 /* Avoid creating a duplicate psymtab for PST.
20254 We do this by comparing INCLUDE_NAME and PST_FILENAME.
20255 Before we do the comparison, however, we need to account
20256 for DIR_NAME and COMP_DIR.
20257 First prepend dir_name (if non-NULL). If we still don't
20258 have an absolute path prepend comp_dir (if non-NULL).
20259 However, the directory we record in the include-file's
20260 psymtab does not contain COMP_DIR (to match the
20261 corresponding symtab(s)).
20266 bash$ gcc -g ./hello.c
20267 include_name = "hello.c"
20269 DW_AT_comp_dir = comp_dir = "/tmp"
20270 DW_AT_name = "./hello.c"
20274 if (dir_name
!= NULL
)
20276 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
20277 include_name
, (char *) NULL
));
20278 include_name
= name_holder
->get ();
20279 include_name_to_compare
= include_name
;
20281 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
20283 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
20284 include_name
, (char *) NULL
));
20285 include_name_to_compare
= hold_compare
.get ();
20289 pst_filename
= pst
->filename
;
20290 gdb::unique_xmalloc_ptr
<char> copied_name
;
20291 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
20293 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
20294 pst_filename
, (char *) NULL
));
20295 pst_filename
= copied_name
.get ();
20298 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
20302 return include_name
;
20305 /* State machine to track the state of the line number program. */
20307 class lnp_state_machine
20310 /* Initialize a machine state for the start of a line number
20312 lnp_state_machine (gdbarch
*arch
, line_header
*lh
, bool record_lines_p
);
20314 file_entry
*current_file ()
20316 /* lh->file_names is 0-based, but the file name numbers in the
20317 statement program are 1-based. */
20318 return m_line_header
->file_name_at (m_file
);
20321 /* Record the line in the state machine. END_SEQUENCE is true if
20322 we're processing the end of a sequence. */
20323 void record_line (bool end_sequence
);
20325 /* Check address and if invalid nop-out the rest of the lines in this
20327 void check_line_address (struct dwarf2_cu
*cu
,
20328 const gdb_byte
*line_ptr
,
20329 CORE_ADDR lowpc
, CORE_ADDR address
);
20331 void handle_set_discriminator (unsigned int discriminator
)
20333 m_discriminator
= discriminator
;
20334 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
20337 /* Handle DW_LNE_set_address. */
20338 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
20341 address
+= baseaddr
;
20342 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
20345 /* Handle DW_LNS_advance_pc. */
20346 void handle_advance_pc (CORE_ADDR adjust
);
20348 /* Handle a special opcode. */
20349 void handle_special_opcode (unsigned char op_code
);
20351 /* Handle DW_LNS_advance_line. */
20352 void handle_advance_line (int line_delta
)
20354 advance_line (line_delta
);
20357 /* Handle DW_LNS_set_file. */
20358 void handle_set_file (file_name_index file
);
20360 /* Handle DW_LNS_negate_stmt. */
20361 void handle_negate_stmt ()
20363 m_is_stmt
= !m_is_stmt
;
20366 /* Handle DW_LNS_const_add_pc. */
20367 void handle_const_add_pc ();
20369 /* Handle DW_LNS_fixed_advance_pc. */
20370 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
20372 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20376 /* Handle DW_LNS_copy. */
20377 void handle_copy ()
20379 record_line (false);
20380 m_discriminator
= 0;
20383 /* Handle DW_LNE_end_sequence. */
20384 void handle_end_sequence ()
20386 m_record_line_callback
= ::record_line
;
20390 /* Advance the line by LINE_DELTA. */
20391 void advance_line (int line_delta
)
20393 m_line
+= line_delta
;
20395 if (line_delta
!= 0)
20396 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20399 gdbarch
*m_gdbarch
;
20401 /* True if we're recording lines.
20402 Otherwise we're building partial symtabs and are just interested in
20403 finding include files mentioned by the line number program. */
20404 bool m_record_lines_p
;
20406 /* The line number header. */
20407 line_header
*m_line_header
;
20409 /* These are part of the standard DWARF line number state machine,
20410 and initialized according to the DWARF spec. */
20412 unsigned char m_op_index
= 0;
20413 /* The line table index (1-based) of the current file. */
20414 file_name_index m_file
= (file_name_index
) 1;
20415 unsigned int m_line
= 1;
20417 /* These are initialized in the constructor. */
20419 CORE_ADDR m_address
;
20421 unsigned int m_discriminator
;
20423 /* Additional bits of state we need to track. */
20425 /* The last file that we called dwarf2_start_subfile for.
20426 This is only used for TLLs. */
20427 unsigned int m_last_file
= 0;
20428 /* The last file a line number was recorded for. */
20429 struct subfile
*m_last_subfile
= NULL
;
20431 /* The function to call to record a line. */
20432 record_line_ftype
*m_record_line_callback
= NULL
;
20434 /* The last line number that was recorded, used to coalesce
20435 consecutive entries for the same line. This can happen, for
20436 example, when discriminators are present. PR 17276. */
20437 unsigned int m_last_line
= 0;
20438 bool m_line_has_non_zero_discriminator
= false;
20442 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
20444 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
20445 / m_line_header
->maximum_ops_per_instruction
)
20446 * m_line_header
->minimum_instruction_length
);
20447 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20448 m_op_index
= ((m_op_index
+ adjust
)
20449 % m_line_header
->maximum_ops_per_instruction
);
20453 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
20455 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
20456 CORE_ADDR addr_adj
= (((m_op_index
20457 + (adj_opcode
/ m_line_header
->line_range
))
20458 / m_line_header
->maximum_ops_per_instruction
)
20459 * m_line_header
->minimum_instruction_length
);
20460 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20461 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
20462 % m_line_header
->maximum_ops_per_instruction
);
20464 int line_delta
= (m_line_header
->line_base
20465 + (adj_opcode
% m_line_header
->line_range
));
20466 advance_line (line_delta
);
20467 record_line (false);
20468 m_discriminator
= 0;
20472 lnp_state_machine::handle_set_file (file_name_index file
)
20476 const file_entry
*fe
= current_file ();
20478 dwarf2_debug_line_missing_file_complaint ();
20479 else if (m_record_lines_p
)
20481 const char *dir
= fe
->include_dir (m_line_header
);
20483 m_last_subfile
= current_subfile
;
20484 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20485 dwarf2_start_subfile (fe
->name
, dir
);
20490 lnp_state_machine::handle_const_add_pc ()
20493 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
20496 = (((m_op_index
+ adjust
)
20497 / m_line_header
->maximum_ops_per_instruction
)
20498 * m_line_header
->minimum_instruction_length
);
20500 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20501 m_op_index
= ((m_op_index
+ adjust
)
20502 % m_line_header
->maximum_ops_per_instruction
);
20505 /* Ignore this record_line request. */
20508 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
20513 /* Return non-zero if we should add LINE to the line number table.
20514 LINE is the line to add, LAST_LINE is the last line that was added,
20515 LAST_SUBFILE is the subfile for LAST_LINE.
20516 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
20517 had a non-zero discriminator.
20519 We have to be careful in the presence of discriminators.
20520 E.g., for this line:
20522 for (i = 0; i < 100000; i++);
20524 clang can emit four line number entries for that one line,
20525 each with a different discriminator.
20526 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20528 However, we want gdb to coalesce all four entries into one.
20529 Otherwise the user could stepi into the middle of the line and
20530 gdb would get confused about whether the pc really was in the
20531 middle of the line.
20533 Things are further complicated by the fact that two consecutive
20534 line number entries for the same line is a heuristic used by gcc
20535 to denote the end of the prologue. So we can't just discard duplicate
20536 entries, we have to be selective about it. The heuristic we use is
20537 that we only collapse consecutive entries for the same line if at least
20538 one of those entries has a non-zero discriminator. PR 17276.
20540 Note: Addresses in the line number state machine can never go backwards
20541 within one sequence, thus this coalescing is ok. */
20544 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
20545 int line_has_non_zero_discriminator
,
20546 struct subfile
*last_subfile
)
20548 if (current_subfile
!= last_subfile
)
20550 if (line
!= last_line
)
20552 /* Same line for the same file that we've seen already.
20553 As a last check, for pr 17276, only record the line if the line
20554 has never had a non-zero discriminator. */
20555 if (!line_has_non_zero_discriminator
)
20560 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
20561 in the line table of subfile SUBFILE. */
20564 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20565 unsigned int line
, CORE_ADDR address
,
20566 record_line_ftype p_record_line
)
20568 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20570 if (dwarf_line_debug
)
20572 fprintf_unfiltered (gdb_stdlog
,
20573 "Recording line %u, file %s, address %s\n",
20574 line
, lbasename (subfile
->name
),
20575 paddress (gdbarch
, address
));
20578 (*p_record_line
) (subfile
, line
, addr
);
20581 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20582 Mark the end of a set of line number records.
20583 The arguments are the same as for dwarf_record_line_1.
20584 If SUBFILE is NULL the request is ignored. */
20587 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20588 CORE_ADDR address
, record_line_ftype p_record_line
)
20590 if (subfile
== NULL
)
20593 if (dwarf_line_debug
)
20595 fprintf_unfiltered (gdb_stdlog
,
20596 "Finishing current line, file %s, address %s\n",
20597 lbasename (subfile
->name
),
20598 paddress (gdbarch
, address
));
20601 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
20605 lnp_state_machine::record_line (bool end_sequence
)
20607 if (dwarf_line_debug
)
20609 fprintf_unfiltered (gdb_stdlog
,
20610 "Processing actual line %u: file %u,"
20611 " address %s, is_stmt %u, discrim %u\n",
20612 m_line
, to_underlying (m_file
),
20613 paddress (m_gdbarch
, m_address
),
20614 m_is_stmt
, m_discriminator
);
20617 file_entry
*fe
= current_file ();
20620 dwarf2_debug_line_missing_file_complaint ();
20621 /* For now we ignore lines not starting on an instruction boundary.
20622 But not when processing end_sequence for compatibility with the
20623 previous version of the code. */
20624 else if (m_op_index
== 0 || end_sequence
)
20626 fe
->included_p
= 1;
20627 if (m_record_lines_p
&& m_is_stmt
)
20629 if (m_last_subfile
!= current_subfile
|| end_sequence
)
20631 dwarf_finish_line (m_gdbarch
, m_last_subfile
,
20632 m_address
, m_record_line_callback
);
20637 if (dwarf_record_line_p (m_line
, m_last_line
,
20638 m_line_has_non_zero_discriminator
,
20641 dwarf_record_line_1 (m_gdbarch
, current_subfile
,
20643 m_record_line_callback
);
20645 m_last_subfile
= current_subfile
;
20646 m_last_line
= m_line
;
20652 lnp_state_machine::lnp_state_machine (gdbarch
*arch
, line_header
*lh
,
20653 bool record_lines_p
)
20656 m_record_lines_p
= record_lines_p
;
20657 m_line_header
= lh
;
20659 m_record_line_callback
= ::record_line
;
20661 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20662 was a line entry for it so that the backend has a chance to adjust it
20663 and also record it in case it needs it. This is currently used by MIPS
20664 code, cf. `mips_adjust_dwarf2_line'. */
20665 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20666 m_is_stmt
= lh
->default_is_stmt
;
20667 m_discriminator
= 0;
20671 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20672 const gdb_byte
*line_ptr
,
20673 CORE_ADDR lowpc
, CORE_ADDR address
)
20675 /* If address < lowpc then it's not a usable value, it's outside the
20676 pc range of the CU. However, we restrict the test to only address
20677 values of zero to preserve GDB's previous behaviour which is to
20678 handle the specific case of a function being GC'd by the linker. */
20680 if (address
== 0 && address
< lowpc
)
20682 /* This line table is for a function which has been
20683 GCd by the linker. Ignore it. PR gdb/12528 */
20685 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20686 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20688 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20689 line_offset
, objfile_name (objfile
));
20690 m_record_line_callback
= noop_record_line
;
20691 /* Note: record_line_callback is left as noop_record_line until
20692 we see DW_LNE_end_sequence. */
20696 /* Subroutine of dwarf_decode_lines to simplify it.
20697 Process the line number information in LH.
20698 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20699 program in order to set included_p for every referenced header. */
20702 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20703 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20705 const gdb_byte
*line_ptr
, *extended_end
;
20706 const gdb_byte
*line_end
;
20707 unsigned int bytes_read
, extended_len
;
20708 unsigned char op_code
, extended_op
;
20709 CORE_ADDR baseaddr
;
20710 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20711 bfd
*abfd
= objfile
->obfd
;
20712 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
20713 /* True if we're recording line info (as opposed to building partial
20714 symtabs and just interested in finding include files mentioned by
20715 the line number program). */
20716 bool record_lines_p
= !decode_for_pst_p
;
20718 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
20720 line_ptr
= lh
->statement_program_start
;
20721 line_end
= lh
->statement_program_end
;
20723 /* Read the statement sequences until there's nothing left. */
20724 while (line_ptr
< line_end
)
20726 /* The DWARF line number program state machine. Reset the state
20727 machine at the start of each sequence. */
20728 lnp_state_machine
state_machine (gdbarch
, lh
, record_lines_p
);
20729 bool end_sequence
= false;
20731 if (record_lines_p
)
20733 /* Start a subfile for the current file of the state
20735 const file_entry
*fe
= state_machine
.current_file ();
20738 dwarf2_start_subfile (fe
->name
, fe
->include_dir (lh
));
20741 /* Decode the table. */
20742 while (line_ptr
< line_end
&& !end_sequence
)
20744 op_code
= read_1_byte (abfd
, line_ptr
);
20747 if (op_code
>= lh
->opcode_base
)
20749 /* Special opcode. */
20750 state_machine
.handle_special_opcode (op_code
);
20752 else switch (op_code
)
20754 case DW_LNS_extended_op
:
20755 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
20757 line_ptr
+= bytes_read
;
20758 extended_end
= line_ptr
+ extended_len
;
20759 extended_op
= read_1_byte (abfd
, line_ptr
);
20761 switch (extended_op
)
20763 case DW_LNE_end_sequence
:
20764 state_machine
.handle_end_sequence ();
20765 end_sequence
= true;
20767 case DW_LNE_set_address
:
20770 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
20771 line_ptr
+= bytes_read
;
20773 state_machine
.check_line_address (cu
, line_ptr
,
20775 state_machine
.handle_set_address (baseaddr
, address
);
20778 case DW_LNE_define_file
:
20780 const char *cur_file
;
20781 unsigned int mod_time
, length
;
20784 cur_file
= read_direct_string (abfd
, line_ptr
,
20786 line_ptr
+= bytes_read
;
20787 dindex
= (dir_index
)
20788 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20789 line_ptr
+= bytes_read
;
20791 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20792 line_ptr
+= bytes_read
;
20794 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20795 line_ptr
+= bytes_read
;
20796 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
20799 case DW_LNE_set_discriminator
:
20801 /* The discriminator is not interesting to the
20802 debugger; just ignore it. We still need to
20803 check its value though:
20804 if there are consecutive entries for the same
20805 (non-prologue) line we want to coalesce them.
20808 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20809 line_ptr
+= bytes_read
;
20811 state_machine
.handle_set_discriminator (discr
);
20815 complaint (_("mangled .debug_line section"));
20818 /* Make sure that we parsed the extended op correctly. If e.g.
20819 we expected a different address size than the producer used,
20820 we may have read the wrong number of bytes. */
20821 if (line_ptr
!= extended_end
)
20823 complaint (_("mangled .debug_line section"));
20828 state_machine
.handle_copy ();
20830 case DW_LNS_advance_pc
:
20833 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20834 line_ptr
+= bytes_read
;
20836 state_machine
.handle_advance_pc (adjust
);
20839 case DW_LNS_advance_line
:
20842 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
20843 line_ptr
+= bytes_read
;
20845 state_machine
.handle_advance_line (line_delta
);
20848 case DW_LNS_set_file
:
20850 file_name_index file
20851 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
20853 line_ptr
+= bytes_read
;
20855 state_machine
.handle_set_file (file
);
20858 case DW_LNS_set_column
:
20859 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20860 line_ptr
+= bytes_read
;
20862 case DW_LNS_negate_stmt
:
20863 state_machine
.handle_negate_stmt ();
20865 case DW_LNS_set_basic_block
:
20867 /* Add to the address register of the state machine the
20868 address increment value corresponding to special opcode
20869 255. I.e., this value is scaled by the minimum
20870 instruction length since special opcode 255 would have
20871 scaled the increment. */
20872 case DW_LNS_const_add_pc
:
20873 state_machine
.handle_const_add_pc ();
20875 case DW_LNS_fixed_advance_pc
:
20877 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
20880 state_machine
.handle_fixed_advance_pc (addr_adj
);
20885 /* Unknown standard opcode, ignore it. */
20888 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
20890 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20891 line_ptr
+= bytes_read
;
20898 dwarf2_debug_line_missing_end_sequence_complaint ();
20900 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
20901 in which case we still finish recording the last line). */
20902 state_machine
.record_line (true);
20906 /* Decode the Line Number Program (LNP) for the given line_header
20907 structure and CU. The actual information extracted and the type
20908 of structures created from the LNP depends on the value of PST.
20910 1. If PST is NULL, then this procedure uses the data from the program
20911 to create all necessary symbol tables, and their linetables.
20913 2. If PST is not NULL, this procedure reads the program to determine
20914 the list of files included by the unit represented by PST, and
20915 builds all the associated partial symbol tables.
20917 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20918 It is used for relative paths in the line table.
20919 NOTE: When processing partial symtabs (pst != NULL),
20920 comp_dir == pst->dirname.
20922 NOTE: It is important that psymtabs have the same file name (via strcmp)
20923 as the corresponding symtab. Since COMP_DIR is not used in the name of the
20924 symtab we don't use it in the name of the psymtabs we create.
20925 E.g. expand_line_sal requires this when finding psymtabs to expand.
20926 A good testcase for this is mb-inline.exp.
20928 LOWPC is the lowest address in CU (or 0 if not known).
20930 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
20931 for its PC<->lines mapping information. Otherwise only the filename
20932 table is read in. */
20935 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
20936 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
20937 CORE_ADDR lowpc
, int decode_mapping
)
20939 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20940 const int decode_for_pst_p
= (pst
!= NULL
);
20942 if (decode_mapping
)
20943 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
20945 if (decode_for_pst_p
)
20949 /* Now that we're done scanning the Line Header Program, we can
20950 create the psymtab of each included file. */
20951 for (file_index
= 0; file_index
< lh
->file_names
.size (); file_index
++)
20952 if (lh
->file_names
[file_index
].included_p
== 1)
20954 gdb::unique_xmalloc_ptr
<char> name_holder
;
20955 const char *include_name
=
20956 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
,
20958 if (include_name
!= NULL
)
20959 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
20964 /* Make sure a symtab is created for every file, even files
20965 which contain only variables (i.e. no code with associated
20967 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
20970 for (i
= 0; i
< lh
->file_names
.size (); i
++)
20972 file_entry
&fe
= lh
->file_names
[i
];
20974 dwarf2_start_subfile (fe
.name
, fe
.include_dir (lh
));
20976 if (current_subfile
->symtab
== NULL
)
20978 current_subfile
->symtab
20979 = allocate_symtab (cust
, current_subfile
->name
);
20981 fe
.symtab
= current_subfile
->symtab
;
20986 /* Start a subfile for DWARF. FILENAME is the name of the file and
20987 DIRNAME the name of the source directory which contains FILENAME
20988 or NULL if not known.
20989 This routine tries to keep line numbers from identical absolute and
20990 relative file names in a common subfile.
20992 Using the `list' example from the GDB testsuite, which resides in
20993 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
20994 of /srcdir/list0.c yields the following debugging information for list0.c:
20996 DW_AT_name: /srcdir/list0.c
20997 DW_AT_comp_dir: /compdir
20998 files.files[0].name: list0.h
20999 files.files[0].dir: /srcdir
21000 files.files[1].name: list0.c
21001 files.files[1].dir: /srcdir
21003 The line number information for list0.c has to end up in a single
21004 subfile, so that `break /srcdir/list0.c:1' works as expected.
21005 start_subfile will ensure that this happens provided that we pass the
21006 concatenation of files.files[1].dir and files.files[1].name as the
21010 dwarf2_start_subfile (const char *filename
, const char *dirname
)
21014 /* In order not to lose the line information directory,
21015 we concatenate it to the filename when it makes sense.
21016 Note that the Dwarf3 standard says (speaking of filenames in line
21017 information): ``The directory index is ignored for file names
21018 that represent full path names''. Thus ignoring dirname in the
21019 `else' branch below isn't an issue. */
21021 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
21023 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
21027 start_subfile (filename
);
21033 /* Start a symtab for DWARF.
21034 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
21036 static struct compunit_symtab
*
21037 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
21038 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
21040 struct compunit_symtab
*cust
21041 = start_symtab (cu
->per_cu
->dwarf2_per_objfile
->objfile
, name
, comp_dir
,
21042 low_pc
, cu
->language
);
21044 record_debugformat ("DWARF 2");
21045 record_producer (cu
->producer
);
21047 /* We assume that we're processing GCC output. */
21048 processing_gcc_compilation
= 2;
21050 cu
->processing_has_namespace_info
= 0;
21056 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
21057 struct dwarf2_cu
*cu
)
21059 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21060 struct comp_unit_head
*cu_header
= &cu
->header
;
21062 /* NOTE drow/2003-01-30: There used to be a comment and some special
21063 code here to turn a symbol with DW_AT_external and a
21064 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
21065 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
21066 with some versions of binutils) where shared libraries could have
21067 relocations against symbols in their debug information - the
21068 minimal symbol would have the right address, but the debug info
21069 would not. It's no longer necessary, because we will explicitly
21070 apply relocations when we read in the debug information now. */
21072 /* A DW_AT_location attribute with no contents indicates that a
21073 variable has been optimized away. */
21074 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
21076 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21080 /* Handle one degenerate form of location expression specially, to
21081 preserve GDB's previous behavior when section offsets are
21082 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
21083 then mark this symbol as LOC_STATIC. */
21085 if (attr_form_is_block (attr
)
21086 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
21087 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
21088 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
21089 && (DW_BLOCK (attr
)->size
21090 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
21092 unsigned int dummy
;
21094 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
21095 SYMBOL_VALUE_ADDRESS (sym
) =
21096 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
21098 SYMBOL_VALUE_ADDRESS (sym
) =
21099 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
21100 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
21101 fixup_symbol_section (sym
, objfile
);
21102 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
21103 SYMBOL_SECTION (sym
));
21107 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
21108 expression evaluator, and use LOC_COMPUTED only when necessary
21109 (i.e. when the value of a register or memory location is
21110 referenced, or a thread-local block, etc.). Then again, it might
21111 not be worthwhile. I'm assuming that it isn't unless performance
21112 or memory numbers show me otherwise. */
21114 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
21116 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
21117 cu
->has_loclist
= 1;
21120 /* Given a pointer to a DWARF information entry, figure out if we need
21121 to make a symbol table entry for it, and if so, create a new entry
21122 and return a pointer to it.
21123 If TYPE is NULL, determine symbol type from the die, otherwise
21124 used the passed type.
21125 If SPACE is not NULL, use it to hold the new symbol. If it is
21126 NULL, allocate a new symbol on the objfile's obstack. */
21128 static struct symbol
*
21129 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
21130 struct symbol
*space
)
21132 struct dwarf2_per_objfile
*dwarf2_per_objfile
21133 = cu
->per_cu
->dwarf2_per_objfile
;
21134 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21135 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21136 struct symbol
*sym
= NULL
;
21138 struct attribute
*attr
= NULL
;
21139 struct attribute
*attr2
= NULL
;
21140 CORE_ADDR baseaddr
;
21141 struct pending
**list_to_add
= NULL
;
21143 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
21145 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21147 name
= dwarf2_name (die
, cu
);
21150 const char *linkagename
;
21151 int suppress_add
= 0;
21156 sym
= allocate_symbol (objfile
);
21157 OBJSTAT (objfile
, n_syms
++);
21159 /* Cache this symbol's name and the name's demangled form (if any). */
21160 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
21161 linkagename
= dwarf2_physname (name
, die
, cu
);
21162 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
21164 /* Fortran does not have mangling standard and the mangling does differ
21165 between gfortran, iFort etc. */
21166 if (cu
->language
== language_fortran
21167 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
21168 symbol_set_demangled_name (&(sym
->ginfo
),
21169 dwarf2_full_name (name
, die
, cu
),
21172 /* Default assumptions.
21173 Use the passed type or decode it from the die. */
21174 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21175 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21177 SYMBOL_TYPE (sym
) = type
;
21179 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
21180 attr
= dwarf2_attr (die
,
21181 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
21185 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
21188 attr
= dwarf2_attr (die
,
21189 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
21193 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
21194 struct file_entry
*fe
;
21196 if (cu
->line_header
!= NULL
)
21197 fe
= cu
->line_header
->file_name_at (file_index
);
21202 complaint (_("file index out of range"));
21204 symbol_set_symtab (sym
, fe
->symtab
);
21210 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
21215 addr
= attr_value_as_address (attr
);
21216 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
21217 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
21219 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
21220 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
21221 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
21222 add_symbol_to_list (sym
, cu
->list_in_scope
);
21224 case DW_TAG_subprogram
:
21225 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21227 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21228 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21229 if ((attr2
&& (DW_UNSND (attr2
) != 0))
21230 || cu
->language
== language_ada
)
21232 /* Subprograms marked external are stored as a global symbol.
21233 Ada subprograms, whether marked external or not, are always
21234 stored as a global symbol, because we want to be able to
21235 access them globally. For instance, we want to be able
21236 to break on a nested subprogram without having to
21237 specify the context. */
21238 list_to_add
= &global_symbols
;
21242 list_to_add
= cu
->list_in_scope
;
21245 case DW_TAG_inlined_subroutine
:
21246 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21248 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21249 SYMBOL_INLINED (sym
) = 1;
21250 list_to_add
= cu
->list_in_scope
;
21252 case DW_TAG_template_value_param
:
21254 /* Fall through. */
21255 case DW_TAG_constant
:
21256 case DW_TAG_variable
:
21257 case DW_TAG_member
:
21258 /* Compilation with minimal debug info may result in
21259 variables with missing type entries. Change the
21260 misleading `void' type to something sensible. */
21261 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
21262 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
21264 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21265 /* In the case of DW_TAG_member, we should only be called for
21266 static const members. */
21267 if (die
->tag
== DW_TAG_member
)
21269 /* dwarf2_add_field uses die_is_declaration,
21270 so we do the same. */
21271 gdb_assert (die_is_declaration (die
, cu
));
21276 dwarf2_const_value (attr
, sym
, cu
);
21277 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21280 if (attr2
&& (DW_UNSND (attr2
) != 0))
21281 list_to_add
= &global_symbols
;
21283 list_to_add
= cu
->list_in_scope
;
21287 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21290 var_decode_location (attr
, sym
, cu
);
21291 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21293 /* Fortran explicitly imports any global symbols to the local
21294 scope by DW_TAG_common_block. */
21295 if (cu
->language
== language_fortran
&& die
->parent
21296 && die
->parent
->tag
== DW_TAG_common_block
)
21299 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21300 && SYMBOL_VALUE_ADDRESS (sym
) == 0
21301 && !dwarf2_per_objfile
->has_section_at_zero
)
21303 /* When a static variable is eliminated by the linker,
21304 the corresponding debug information is not stripped
21305 out, but the variable address is set to null;
21306 do not add such variables into symbol table. */
21308 else if (attr2
&& (DW_UNSND (attr2
) != 0))
21310 /* Workaround gfortran PR debug/40040 - it uses
21311 DW_AT_location for variables in -fPIC libraries which may
21312 get overriden by other libraries/executable and get
21313 a different address. Resolve it by the minimal symbol
21314 which may come from inferior's executable using copy
21315 relocation. Make this workaround only for gfortran as for
21316 other compilers GDB cannot guess the minimal symbol
21317 Fortran mangling kind. */
21318 if (cu
->language
== language_fortran
&& die
->parent
21319 && die
->parent
->tag
== DW_TAG_module
21321 && startswith (cu
->producer
, "GNU Fortran"))
21322 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21324 /* A variable with DW_AT_external is never static,
21325 but it may be block-scoped. */
21326 list_to_add
= (cu
->list_in_scope
== &file_symbols
21327 ? &global_symbols
: cu
->list_in_scope
);
21330 list_to_add
= cu
->list_in_scope
;
21334 /* We do not know the address of this symbol.
21335 If it is an external symbol and we have type information
21336 for it, enter the symbol as a LOC_UNRESOLVED symbol.
21337 The address of the variable will then be determined from
21338 the minimal symbol table whenever the variable is
21340 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21342 /* Fortran explicitly imports any global symbols to the local
21343 scope by DW_TAG_common_block. */
21344 if (cu
->language
== language_fortran
&& die
->parent
21345 && die
->parent
->tag
== DW_TAG_common_block
)
21347 /* SYMBOL_CLASS doesn't matter here because
21348 read_common_block is going to reset it. */
21350 list_to_add
= cu
->list_in_scope
;
21352 else if (attr2
&& (DW_UNSND (attr2
) != 0)
21353 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
21355 /* A variable with DW_AT_external is never static, but it
21356 may be block-scoped. */
21357 list_to_add
= (cu
->list_in_scope
== &file_symbols
21358 ? &global_symbols
: cu
->list_in_scope
);
21360 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21362 else if (!die_is_declaration (die
, cu
))
21364 /* Use the default LOC_OPTIMIZED_OUT class. */
21365 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
21367 list_to_add
= cu
->list_in_scope
;
21371 case DW_TAG_formal_parameter
:
21372 /* If we are inside a function, mark this as an argument. If
21373 not, we might be looking at an argument to an inlined function
21374 when we do not have enough information to show inlined frames;
21375 pretend it's a local variable in that case so that the user can
21377 if (context_stack_depth
> 0
21378 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
21379 SYMBOL_IS_ARGUMENT (sym
) = 1;
21380 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21383 var_decode_location (attr
, sym
, cu
);
21385 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21388 dwarf2_const_value (attr
, sym
, cu
);
21391 list_to_add
= cu
->list_in_scope
;
21393 case DW_TAG_unspecified_parameters
:
21394 /* From varargs functions; gdb doesn't seem to have any
21395 interest in this information, so just ignore it for now.
21398 case DW_TAG_template_type_param
:
21400 /* Fall through. */
21401 case DW_TAG_class_type
:
21402 case DW_TAG_interface_type
:
21403 case DW_TAG_structure_type
:
21404 case DW_TAG_union_type
:
21405 case DW_TAG_set_type
:
21406 case DW_TAG_enumeration_type
:
21407 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21408 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
21411 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
21412 really ever be static objects: otherwise, if you try
21413 to, say, break of a class's method and you're in a file
21414 which doesn't mention that class, it won't work unless
21415 the check for all static symbols in lookup_symbol_aux
21416 saves you. See the OtherFileClass tests in
21417 gdb.c++/namespace.exp. */
21421 list_to_add
= (cu
->list_in_scope
== &file_symbols
21422 && cu
->language
== language_cplus
21423 ? &global_symbols
: cu
->list_in_scope
);
21425 /* The semantics of C++ state that "struct foo {
21426 ... }" also defines a typedef for "foo". */
21427 if (cu
->language
== language_cplus
21428 || cu
->language
== language_ada
21429 || cu
->language
== language_d
21430 || cu
->language
== language_rust
)
21432 /* The symbol's name is already allocated along
21433 with this objfile, so we don't need to
21434 duplicate it for the type. */
21435 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
21436 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
21441 case DW_TAG_typedef
:
21442 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21443 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21444 list_to_add
= cu
->list_in_scope
;
21446 case DW_TAG_base_type
:
21447 case DW_TAG_subrange_type
:
21448 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21449 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21450 list_to_add
= cu
->list_in_scope
;
21452 case DW_TAG_enumerator
:
21453 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21456 dwarf2_const_value (attr
, sym
, cu
);
21459 /* NOTE: carlton/2003-11-10: See comment above in the
21460 DW_TAG_class_type, etc. block. */
21462 list_to_add
= (cu
->list_in_scope
== &file_symbols
21463 && cu
->language
== language_cplus
21464 ? &global_symbols
: cu
->list_in_scope
);
21467 case DW_TAG_imported_declaration
:
21468 case DW_TAG_namespace
:
21469 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21470 list_to_add
= &global_symbols
;
21472 case DW_TAG_module
:
21473 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21474 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
21475 list_to_add
= &global_symbols
;
21477 case DW_TAG_common_block
:
21478 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
21479 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
21480 add_symbol_to_list (sym
, cu
->list_in_scope
);
21483 /* Not a tag we recognize. Hopefully we aren't processing
21484 trash data, but since we must specifically ignore things
21485 we don't recognize, there is nothing else we should do at
21487 complaint (_("unsupported tag: '%s'"),
21488 dwarf_tag_name (die
->tag
));
21494 sym
->hash_next
= objfile
->template_symbols
;
21495 objfile
->template_symbols
= sym
;
21496 list_to_add
= NULL
;
21499 if (list_to_add
!= NULL
)
21500 add_symbol_to_list (sym
, list_to_add
);
21502 /* For the benefit of old versions of GCC, check for anonymous
21503 namespaces based on the demangled name. */
21504 if (!cu
->processing_has_namespace_info
21505 && cu
->language
== language_cplus
)
21506 cp_scan_for_anonymous_namespaces (sym
, objfile
);
21511 /* Given an attr with a DW_FORM_dataN value in host byte order,
21512 zero-extend it as appropriate for the symbol's type. The DWARF
21513 standard (v4) is not entirely clear about the meaning of using
21514 DW_FORM_dataN for a constant with a signed type, where the type is
21515 wider than the data. The conclusion of a discussion on the DWARF
21516 list was that this is unspecified. We choose to always zero-extend
21517 because that is the interpretation long in use by GCC. */
21520 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21521 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21523 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21524 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21525 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21526 LONGEST l
= DW_UNSND (attr
);
21528 if (bits
< sizeof (*value
) * 8)
21530 l
&= ((LONGEST
) 1 << bits
) - 1;
21533 else if (bits
== sizeof (*value
) * 8)
21537 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21538 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21545 /* Read a constant value from an attribute. Either set *VALUE, or if
21546 the value does not fit in *VALUE, set *BYTES - either already
21547 allocated on the objfile obstack, or newly allocated on OBSTACK,
21548 or, set *BATON, if we translated the constant to a location
21552 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21553 const char *name
, struct obstack
*obstack
,
21554 struct dwarf2_cu
*cu
,
21555 LONGEST
*value
, const gdb_byte
**bytes
,
21556 struct dwarf2_locexpr_baton
**baton
)
21558 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21559 struct comp_unit_head
*cu_header
= &cu
->header
;
21560 struct dwarf_block
*blk
;
21561 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21562 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21568 switch (attr
->form
)
21571 case DW_FORM_GNU_addr_index
:
21575 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21576 dwarf2_const_value_length_mismatch_complaint (name
,
21577 cu_header
->addr_size
,
21578 TYPE_LENGTH (type
));
21579 /* Symbols of this form are reasonably rare, so we just
21580 piggyback on the existing location code rather than writing
21581 a new implementation of symbol_computed_ops. */
21582 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21583 (*baton
)->per_cu
= cu
->per_cu
;
21584 gdb_assert ((*baton
)->per_cu
);
21586 (*baton
)->size
= 2 + cu_header
->addr_size
;
21587 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21588 (*baton
)->data
= data
;
21590 data
[0] = DW_OP_addr
;
21591 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21592 byte_order
, DW_ADDR (attr
));
21593 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21596 case DW_FORM_string
:
21598 case DW_FORM_GNU_str_index
:
21599 case DW_FORM_GNU_strp_alt
:
21600 /* DW_STRING is already allocated on the objfile obstack, point
21602 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21604 case DW_FORM_block1
:
21605 case DW_FORM_block2
:
21606 case DW_FORM_block4
:
21607 case DW_FORM_block
:
21608 case DW_FORM_exprloc
:
21609 case DW_FORM_data16
:
21610 blk
= DW_BLOCK (attr
);
21611 if (TYPE_LENGTH (type
) != blk
->size
)
21612 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21613 TYPE_LENGTH (type
));
21614 *bytes
= blk
->data
;
21617 /* The DW_AT_const_value attributes are supposed to carry the
21618 symbol's value "represented as it would be on the target
21619 architecture." By the time we get here, it's already been
21620 converted to host endianness, so we just need to sign- or
21621 zero-extend it as appropriate. */
21622 case DW_FORM_data1
:
21623 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21625 case DW_FORM_data2
:
21626 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21628 case DW_FORM_data4
:
21629 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21631 case DW_FORM_data8
:
21632 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21635 case DW_FORM_sdata
:
21636 case DW_FORM_implicit_const
:
21637 *value
= DW_SND (attr
);
21640 case DW_FORM_udata
:
21641 *value
= DW_UNSND (attr
);
21645 complaint (_("unsupported const value attribute form: '%s'"),
21646 dwarf_form_name (attr
->form
));
21653 /* Copy constant value from an attribute to a symbol. */
21656 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21657 struct dwarf2_cu
*cu
)
21659 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21661 const gdb_byte
*bytes
;
21662 struct dwarf2_locexpr_baton
*baton
;
21664 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21665 SYMBOL_PRINT_NAME (sym
),
21666 &objfile
->objfile_obstack
, cu
,
21667 &value
, &bytes
, &baton
);
21671 SYMBOL_LOCATION_BATON (sym
) = baton
;
21672 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21674 else if (bytes
!= NULL
)
21676 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21677 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21681 SYMBOL_VALUE (sym
) = value
;
21682 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21686 /* Return the type of the die in question using its DW_AT_type attribute. */
21688 static struct type
*
21689 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21691 struct attribute
*type_attr
;
21693 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21696 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21697 /* A missing DW_AT_type represents a void type. */
21698 return objfile_type (objfile
)->builtin_void
;
21701 return lookup_die_type (die
, type_attr
, cu
);
21704 /* True iff CU's producer generates GNAT Ada auxiliary information
21705 that allows to find parallel types through that information instead
21706 of having to do expensive parallel lookups by type name. */
21709 need_gnat_info (struct dwarf2_cu
*cu
)
21711 /* Assume that the Ada compiler was GNAT, which always produces
21712 the auxiliary information. */
21713 return (cu
->language
== language_ada
);
21716 /* Return the auxiliary type of the die in question using its
21717 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
21718 attribute is not present. */
21720 static struct type
*
21721 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21723 struct attribute
*type_attr
;
21725 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
21729 return lookup_die_type (die
, type_attr
, cu
);
21732 /* If DIE has a descriptive_type attribute, then set the TYPE's
21733 descriptive type accordingly. */
21736 set_descriptive_type (struct type
*type
, struct die_info
*die
,
21737 struct dwarf2_cu
*cu
)
21739 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
21741 if (descriptive_type
)
21743 ALLOCATE_GNAT_AUX_TYPE (type
);
21744 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
21748 /* Return the containing type of the die in question using its
21749 DW_AT_containing_type attribute. */
21751 static struct type
*
21752 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21754 struct attribute
*type_attr
;
21755 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21757 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
21759 error (_("Dwarf Error: Problem turning containing type into gdb type "
21760 "[in module %s]"), objfile_name (objfile
));
21762 return lookup_die_type (die
, type_attr
, cu
);
21765 /* Return an error marker type to use for the ill formed type in DIE/CU. */
21767 static struct type
*
21768 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
21770 struct dwarf2_per_objfile
*dwarf2_per_objfile
21771 = cu
->per_cu
->dwarf2_per_objfile
;
21772 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21773 char *message
, *saved
;
21775 message
= xstrprintf (_("<unknown type in %s, CU %s, DIE %s>"),
21776 objfile_name (objfile
),
21777 sect_offset_str (cu
->header
.sect_off
),
21778 sect_offset_str (die
->sect_off
));
21779 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
21780 message
, strlen (message
));
21783 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
21786 /* Look up the type of DIE in CU using its type attribute ATTR.
21787 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
21788 DW_AT_containing_type.
21789 If there is no type substitute an error marker. */
21791 static struct type
*
21792 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
21793 struct dwarf2_cu
*cu
)
21795 struct dwarf2_per_objfile
*dwarf2_per_objfile
21796 = cu
->per_cu
->dwarf2_per_objfile
;
21797 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21798 struct type
*this_type
;
21800 gdb_assert (attr
->name
== DW_AT_type
21801 || attr
->name
== DW_AT_GNAT_descriptive_type
21802 || attr
->name
== DW_AT_containing_type
);
21804 /* First see if we have it cached. */
21806 if (attr
->form
== DW_FORM_GNU_ref_alt
)
21808 struct dwarf2_per_cu_data
*per_cu
;
21809 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21811 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
21812 dwarf2_per_objfile
);
21813 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
21815 else if (attr_form_is_ref (attr
))
21817 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21819 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
21821 else if (attr
->form
== DW_FORM_ref_sig8
)
21823 ULONGEST signature
= DW_SIGNATURE (attr
);
21825 return get_signatured_type (die
, signature
, cu
);
21829 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
21830 " at %s [in module %s]"),
21831 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
21832 objfile_name (objfile
));
21833 return build_error_marker_type (cu
, die
);
21836 /* If not cached we need to read it in. */
21838 if (this_type
== NULL
)
21840 struct die_info
*type_die
= NULL
;
21841 struct dwarf2_cu
*type_cu
= cu
;
21843 if (attr_form_is_ref (attr
))
21844 type_die
= follow_die_ref (die
, attr
, &type_cu
);
21845 if (type_die
== NULL
)
21846 return build_error_marker_type (cu
, die
);
21847 /* If we find the type now, it's probably because the type came
21848 from an inter-CU reference and the type's CU got expanded before
21850 this_type
= read_type_die (type_die
, type_cu
);
21853 /* If we still don't have a type use an error marker. */
21855 if (this_type
== NULL
)
21856 return build_error_marker_type (cu
, die
);
21861 /* Return the type in DIE, CU.
21862 Returns NULL for invalid types.
21864 This first does a lookup in die_type_hash,
21865 and only reads the die in if necessary.
21867 NOTE: This can be called when reading in partial or full symbols. */
21869 static struct type
*
21870 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
21872 struct type
*this_type
;
21874 this_type
= get_die_type (die
, cu
);
21878 return read_type_die_1 (die
, cu
);
21881 /* Read the type in DIE, CU.
21882 Returns NULL for invalid types. */
21884 static struct type
*
21885 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
21887 struct type
*this_type
= NULL
;
21891 case DW_TAG_class_type
:
21892 case DW_TAG_interface_type
:
21893 case DW_TAG_structure_type
:
21894 case DW_TAG_union_type
:
21895 this_type
= read_structure_type (die
, cu
);
21897 case DW_TAG_enumeration_type
:
21898 this_type
= read_enumeration_type (die
, cu
);
21900 case DW_TAG_subprogram
:
21901 case DW_TAG_subroutine_type
:
21902 case DW_TAG_inlined_subroutine
:
21903 this_type
= read_subroutine_type (die
, cu
);
21905 case DW_TAG_array_type
:
21906 this_type
= read_array_type (die
, cu
);
21908 case DW_TAG_set_type
:
21909 this_type
= read_set_type (die
, cu
);
21911 case DW_TAG_pointer_type
:
21912 this_type
= read_tag_pointer_type (die
, cu
);
21914 case DW_TAG_ptr_to_member_type
:
21915 this_type
= read_tag_ptr_to_member_type (die
, cu
);
21917 case DW_TAG_reference_type
:
21918 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
21920 case DW_TAG_rvalue_reference_type
:
21921 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
21923 case DW_TAG_const_type
:
21924 this_type
= read_tag_const_type (die
, cu
);
21926 case DW_TAG_volatile_type
:
21927 this_type
= read_tag_volatile_type (die
, cu
);
21929 case DW_TAG_restrict_type
:
21930 this_type
= read_tag_restrict_type (die
, cu
);
21932 case DW_TAG_string_type
:
21933 this_type
= read_tag_string_type (die
, cu
);
21935 case DW_TAG_typedef
:
21936 this_type
= read_typedef (die
, cu
);
21938 case DW_TAG_subrange_type
:
21939 this_type
= read_subrange_type (die
, cu
);
21941 case DW_TAG_base_type
:
21942 this_type
= read_base_type (die
, cu
);
21944 case DW_TAG_unspecified_type
:
21945 this_type
= read_unspecified_type (die
, cu
);
21947 case DW_TAG_namespace
:
21948 this_type
= read_namespace_type (die
, cu
);
21950 case DW_TAG_module
:
21951 this_type
= read_module_type (die
, cu
);
21953 case DW_TAG_atomic_type
:
21954 this_type
= read_tag_atomic_type (die
, cu
);
21957 complaint (_("unexpected tag in read_type_die: '%s'"),
21958 dwarf_tag_name (die
->tag
));
21965 /* See if we can figure out if the class lives in a namespace. We do
21966 this by looking for a member function; its demangled name will
21967 contain namespace info, if there is any.
21968 Return the computed name or NULL.
21969 Space for the result is allocated on the objfile's obstack.
21970 This is the full-die version of guess_partial_die_structure_name.
21971 In this case we know DIE has no useful parent. */
21974 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21976 struct die_info
*spec_die
;
21977 struct dwarf2_cu
*spec_cu
;
21978 struct die_info
*child
;
21979 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21982 spec_die
= die_specification (die
, &spec_cu
);
21983 if (spec_die
!= NULL
)
21989 for (child
= die
->child
;
21991 child
= child
->sibling
)
21993 if (child
->tag
== DW_TAG_subprogram
)
21995 const char *linkage_name
= dw2_linkage_name (child
, cu
);
21997 if (linkage_name
!= NULL
)
22000 = language_class_name_from_physname (cu
->language_defn
,
22004 if (actual_name
!= NULL
)
22006 const char *die_name
= dwarf2_name (die
, cu
);
22008 if (die_name
!= NULL
22009 && strcmp (die_name
, actual_name
) != 0)
22011 /* Strip off the class name from the full name.
22012 We want the prefix. */
22013 int die_name_len
= strlen (die_name
);
22014 int actual_name_len
= strlen (actual_name
);
22016 /* Test for '::' as a sanity check. */
22017 if (actual_name_len
> die_name_len
+ 2
22018 && actual_name
[actual_name_len
22019 - die_name_len
- 1] == ':')
22020 name
= (char *) obstack_copy0 (
22021 &objfile
->per_bfd
->storage_obstack
,
22022 actual_name
, actual_name_len
- die_name_len
- 2);
22025 xfree (actual_name
);
22034 /* GCC might emit a nameless typedef that has a linkage name. Determine the
22035 prefix part in such case. See
22036 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22038 static const char *
22039 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22041 struct attribute
*attr
;
22044 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
22045 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
22048 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
22051 attr
= dw2_linkage_name_attr (die
, cu
);
22052 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22055 /* dwarf2_name had to be already called. */
22056 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
22058 /* Strip the base name, keep any leading namespaces/classes. */
22059 base
= strrchr (DW_STRING (attr
), ':');
22060 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
22063 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22064 return (char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22066 &base
[-1] - DW_STRING (attr
));
22069 /* Return the name of the namespace/class that DIE is defined within,
22070 or "" if we can't tell. The caller should not xfree the result.
22072 For example, if we're within the method foo() in the following
22082 then determine_prefix on foo's die will return "N::C". */
22084 static const char *
22085 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22087 struct dwarf2_per_objfile
*dwarf2_per_objfile
22088 = cu
->per_cu
->dwarf2_per_objfile
;
22089 struct die_info
*parent
, *spec_die
;
22090 struct dwarf2_cu
*spec_cu
;
22091 struct type
*parent_type
;
22092 const char *retval
;
22094 if (cu
->language
!= language_cplus
22095 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
22096 && cu
->language
!= language_rust
)
22099 retval
= anonymous_struct_prefix (die
, cu
);
22103 /* We have to be careful in the presence of DW_AT_specification.
22104 For example, with GCC 3.4, given the code
22108 // Definition of N::foo.
22112 then we'll have a tree of DIEs like this:
22114 1: DW_TAG_compile_unit
22115 2: DW_TAG_namespace // N
22116 3: DW_TAG_subprogram // declaration of N::foo
22117 4: DW_TAG_subprogram // definition of N::foo
22118 DW_AT_specification // refers to die #3
22120 Thus, when processing die #4, we have to pretend that we're in
22121 the context of its DW_AT_specification, namely the contex of die
22124 spec_die
= die_specification (die
, &spec_cu
);
22125 if (spec_die
== NULL
)
22126 parent
= die
->parent
;
22129 parent
= spec_die
->parent
;
22133 if (parent
== NULL
)
22135 else if (parent
->building_fullname
)
22138 const char *parent_name
;
22140 /* It has been seen on RealView 2.2 built binaries,
22141 DW_TAG_template_type_param types actually _defined_ as
22142 children of the parent class:
22145 template class <class Enum> Class{};
22146 Class<enum E> class_e;
22148 1: DW_TAG_class_type (Class)
22149 2: DW_TAG_enumeration_type (E)
22150 3: DW_TAG_enumerator (enum1:0)
22151 3: DW_TAG_enumerator (enum2:1)
22153 2: DW_TAG_template_type_param
22154 DW_AT_type DW_FORM_ref_udata (E)
22156 Besides being broken debug info, it can put GDB into an
22157 infinite loop. Consider:
22159 When we're building the full name for Class<E>, we'll start
22160 at Class, and go look over its template type parameters,
22161 finding E. We'll then try to build the full name of E, and
22162 reach here. We're now trying to build the full name of E,
22163 and look over the parent DIE for containing scope. In the
22164 broken case, if we followed the parent DIE of E, we'd again
22165 find Class, and once again go look at its template type
22166 arguments, etc., etc. Simply don't consider such parent die
22167 as source-level parent of this die (it can't be, the language
22168 doesn't allow it), and break the loop here. */
22169 name
= dwarf2_name (die
, cu
);
22170 parent_name
= dwarf2_name (parent
, cu
);
22171 complaint (_("template param type '%s' defined within parent '%s'"),
22172 name
? name
: "<unknown>",
22173 parent_name
? parent_name
: "<unknown>");
22177 switch (parent
->tag
)
22179 case DW_TAG_namespace
:
22180 parent_type
= read_type_die (parent
, cu
);
22181 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
22182 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
22183 Work around this problem here. */
22184 if (cu
->language
== language_cplus
22185 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
22187 /* We give a name to even anonymous namespaces. */
22188 return TYPE_TAG_NAME (parent_type
);
22189 case DW_TAG_class_type
:
22190 case DW_TAG_interface_type
:
22191 case DW_TAG_structure_type
:
22192 case DW_TAG_union_type
:
22193 case DW_TAG_module
:
22194 parent_type
= read_type_die (parent
, cu
);
22195 if (TYPE_TAG_NAME (parent_type
) != NULL
)
22196 return TYPE_TAG_NAME (parent_type
);
22198 /* An anonymous structure is only allowed non-static data
22199 members; no typedefs, no member functions, et cetera.
22200 So it does not need a prefix. */
22202 case DW_TAG_compile_unit
:
22203 case DW_TAG_partial_unit
:
22204 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
22205 if (cu
->language
== language_cplus
22206 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
22207 && die
->child
!= NULL
22208 && (die
->tag
== DW_TAG_class_type
22209 || die
->tag
== DW_TAG_structure_type
22210 || die
->tag
== DW_TAG_union_type
))
22212 char *name
= guess_full_die_structure_name (die
, cu
);
22217 case DW_TAG_enumeration_type
:
22218 parent_type
= read_type_die (parent
, cu
);
22219 if (TYPE_DECLARED_CLASS (parent_type
))
22221 if (TYPE_TAG_NAME (parent_type
) != NULL
)
22222 return TYPE_TAG_NAME (parent_type
);
22225 /* Fall through. */
22227 return determine_prefix (parent
, cu
);
22231 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
22232 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
22233 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
22234 an obconcat, otherwise allocate storage for the result. The CU argument is
22235 used to determine the language and hence, the appropriate separator. */
22237 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
22240 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
22241 int physname
, struct dwarf2_cu
*cu
)
22243 const char *lead
= "";
22246 if (suffix
== NULL
|| suffix
[0] == '\0'
22247 || prefix
== NULL
|| prefix
[0] == '\0')
22249 else if (cu
->language
== language_d
)
22251 /* For D, the 'main' function could be defined in any module, but it
22252 should never be prefixed. */
22253 if (strcmp (suffix
, "D main") == 0)
22261 else if (cu
->language
== language_fortran
&& physname
)
22263 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
22264 DW_AT_MIPS_linkage_name is preferred and used instead. */
22272 if (prefix
== NULL
)
22274 if (suffix
== NULL
)
22281 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
22283 strcpy (retval
, lead
);
22284 strcat (retval
, prefix
);
22285 strcat (retval
, sep
);
22286 strcat (retval
, suffix
);
22291 /* We have an obstack. */
22292 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
22296 /* Return sibling of die, NULL if no sibling. */
22298 static struct die_info
*
22299 sibling_die (struct die_info
*die
)
22301 return die
->sibling
;
22304 /* Get name of a die, return NULL if not found. */
22306 static const char *
22307 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
22308 struct obstack
*obstack
)
22310 if (name
&& cu
->language
== language_cplus
)
22312 std::string canon_name
= cp_canonicalize_string (name
);
22314 if (!canon_name
.empty ())
22316 if (canon_name
!= name
)
22317 name
= (const char *) obstack_copy0 (obstack
,
22318 canon_name
.c_str (),
22319 canon_name
.length ());
22326 /* Get name of a die, return NULL if not found.
22327 Anonymous namespaces are converted to their magic string. */
22329 static const char *
22330 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22332 struct attribute
*attr
;
22333 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22335 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
22336 if ((!attr
|| !DW_STRING (attr
))
22337 && die
->tag
!= DW_TAG_namespace
22338 && die
->tag
!= DW_TAG_class_type
22339 && die
->tag
!= DW_TAG_interface_type
22340 && die
->tag
!= DW_TAG_structure_type
22341 && die
->tag
!= DW_TAG_union_type
)
22346 case DW_TAG_compile_unit
:
22347 case DW_TAG_partial_unit
:
22348 /* Compilation units have a DW_AT_name that is a filename, not
22349 a source language identifier. */
22350 case DW_TAG_enumeration_type
:
22351 case DW_TAG_enumerator
:
22352 /* These tags always have simple identifiers already; no need
22353 to canonicalize them. */
22354 return DW_STRING (attr
);
22356 case DW_TAG_namespace
:
22357 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
22358 return DW_STRING (attr
);
22359 return CP_ANONYMOUS_NAMESPACE_STR
;
22361 case DW_TAG_class_type
:
22362 case DW_TAG_interface_type
:
22363 case DW_TAG_structure_type
:
22364 case DW_TAG_union_type
:
22365 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
22366 structures or unions. These were of the form "._%d" in GCC 4.1,
22367 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
22368 and GCC 4.4. We work around this problem by ignoring these. */
22369 if (attr
&& DW_STRING (attr
)
22370 && (startswith (DW_STRING (attr
), "._")
22371 || startswith (DW_STRING (attr
), "<anonymous")))
22374 /* GCC might emit a nameless typedef that has a linkage name. See
22375 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22376 if (!attr
|| DW_STRING (attr
) == NULL
)
22378 char *demangled
= NULL
;
22380 attr
= dw2_linkage_name_attr (die
, cu
);
22381 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22384 /* Avoid demangling DW_STRING (attr) the second time on a second
22385 call for the same DIE. */
22386 if (!DW_STRING_IS_CANONICAL (attr
))
22387 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
22393 /* FIXME: we already did this for the partial symbol... */
22396 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22397 demangled
, strlen (demangled
)));
22398 DW_STRING_IS_CANONICAL (attr
) = 1;
22401 /* Strip any leading namespaces/classes, keep only the base name.
22402 DW_AT_name for named DIEs does not contain the prefixes. */
22403 base
= strrchr (DW_STRING (attr
), ':');
22404 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
22407 return DW_STRING (attr
);
22416 if (!DW_STRING_IS_CANONICAL (attr
))
22419 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
22420 &objfile
->per_bfd
->storage_obstack
);
22421 DW_STRING_IS_CANONICAL (attr
) = 1;
22423 return DW_STRING (attr
);
22426 /* Return the die that this die in an extension of, or NULL if there
22427 is none. *EXT_CU is the CU containing DIE on input, and the CU
22428 containing the return value on output. */
22430 static struct die_info
*
22431 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
22433 struct attribute
*attr
;
22435 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
22439 return follow_die_ref (die
, attr
, ext_cu
);
22442 /* Convert a DIE tag into its string name. */
22444 static const char *
22445 dwarf_tag_name (unsigned tag
)
22447 const char *name
= get_DW_TAG_name (tag
);
22450 return "DW_TAG_<unknown>";
22455 /* Convert a DWARF attribute code into its string name. */
22457 static const char *
22458 dwarf_attr_name (unsigned attr
)
22462 #ifdef MIPS /* collides with DW_AT_HP_block_index */
22463 if (attr
== DW_AT_MIPS_fde
)
22464 return "DW_AT_MIPS_fde";
22466 if (attr
== DW_AT_HP_block_index
)
22467 return "DW_AT_HP_block_index";
22470 name
= get_DW_AT_name (attr
);
22473 return "DW_AT_<unknown>";
22478 /* Convert a DWARF value form code into its string name. */
22480 static const char *
22481 dwarf_form_name (unsigned form
)
22483 const char *name
= get_DW_FORM_name (form
);
22486 return "DW_FORM_<unknown>";
22491 static const char *
22492 dwarf_bool_name (unsigned mybool
)
22500 /* Convert a DWARF type code into its string name. */
22502 static const char *
22503 dwarf_type_encoding_name (unsigned enc
)
22505 const char *name
= get_DW_ATE_name (enc
);
22508 return "DW_ATE_<unknown>";
22514 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
22518 print_spaces (indent
, f
);
22519 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
22520 dwarf_tag_name (die
->tag
), die
->abbrev
,
22521 sect_offset_str (die
->sect_off
));
22523 if (die
->parent
!= NULL
)
22525 print_spaces (indent
, f
);
22526 fprintf_unfiltered (f
, " parent at offset: %s\n",
22527 sect_offset_str (die
->parent
->sect_off
));
22530 print_spaces (indent
, f
);
22531 fprintf_unfiltered (f
, " has children: %s\n",
22532 dwarf_bool_name (die
->child
!= NULL
));
22534 print_spaces (indent
, f
);
22535 fprintf_unfiltered (f
, " attributes:\n");
22537 for (i
= 0; i
< die
->num_attrs
; ++i
)
22539 print_spaces (indent
, f
);
22540 fprintf_unfiltered (f
, " %s (%s) ",
22541 dwarf_attr_name (die
->attrs
[i
].name
),
22542 dwarf_form_name (die
->attrs
[i
].form
));
22544 switch (die
->attrs
[i
].form
)
22547 case DW_FORM_GNU_addr_index
:
22548 fprintf_unfiltered (f
, "address: ");
22549 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
22551 case DW_FORM_block2
:
22552 case DW_FORM_block4
:
22553 case DW_FORM_block
:
22554 case DW_FORM_block1
:
22555 fprintf_unfiltered (f
, "block: size %s",
22556 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22558 case DW_FORM_exprloc
:
22559 fprintf_unfiltered (f
, "expression: size %s",
22560 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22562 case DW_FORM_data16
:
22563 fprintf_unfiltered (f
, "constant of 16 bytes");
22565 case DW_FORM_ref_addr
:
22566 fprintf_unfiltered (f
, "ref address: ");
22567 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22569 case DW_FORM_GNU_ref_alt
:
22570 fprintf_unfiltered (f
, "alt ref address: ");
22571 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22577 case DW_FORM_ref_udata
:
22578 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
22579 (long) (DW_UNSND (&die
->attrs
[i
])));
22581 case DW_FORM_data1
:
22582 case DW_FORM_data2
:
22583 case DW_FORM_data4
:
22584 case DW_FORM_data8
:
22585 case DW_FORM_udata
:
22586 case DW_FORM_sdata
:
22587 fprintf_unfiltered (f
, "constant: %s",
22588 pulongest (DW_UNSND (&die
->attrs
[i
])));
22590 case DW_FORM_sec_offset
:
22591 fprintf_unfiltered (f
, "section offset: %s",
22592 pulongest (DW_UNSND (&die
->attrs
[i
])));
22594 case DW_FORM_ref_sig8
:
22595 fprintf_unfiltered (f
, "signature: %s",
22596 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
22598 case DW_FORM_string
:
22600 case DW_FORM_line_strp
:
22601 case DW_FORM_GNU_str_index
:
22602 case DW_FORM_GNU_strp_alt
:
22603 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22604 DW_STRING (&die
->attrs
[i
])
22605 ? DW_STRING (&die
->attrs
[i
]) : "",
22606 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
22609 if (DW_UNSND (&die
->attrs
[i
]))
22610 fprintf_unfiltered (f
, "flag: TRUE");
22612 fprintf_unfiltered (f
, "flag: FALSE");
22614 case DW_FORM_flag_present
:
22615 fprintf_unfiltered (f
, "flag: TRUE");
22617 case DW_FORM_indirect
:
22618 /* The reader will have reduced the indirect form to
22619 the "base form" so this form should not occur. */
22620 fprintf_unfiltered (f
,
22621 "unexpected attribute form: DW_FORM_indirect");
22623 case DW_FORM_implicit_const
:
22624 fprintf_unfiltered (f
, "constant: %s",
22625 plongest (DW_SND (&die
->attrs
[i
])));
22628 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
22629 die
->attrs
[i
].form
);
22632 fprintf_unfiltered (f
, "\n");
22637 dump_die_for_error (struct die_info
*die
)
22639 dump_die_shallow (gdb_stderr
, 0, die
);
22643 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
22645 int indent
= level
* 4;
22647 gdb_assert (die
!= NULL
);
22649 if (level
>= max_level
)
22652 dump_die_shallow (f
, indent
, die
);
22654 if (die
->child
!= NULL
)
22656 print_spaces (indent
, f
);
22657 fprintf_unfiltered (f
, " Children:");
22658 if (level
+ 1 < max_level
)
22660 fprintf_unfiltered (f
, "\n");
22661 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22665 fprintf_unfiltered (f
,
22666 " [not printed, max nesting level reached]\n");
22670 if (die
->sibling
!= NULL
&& level
> 0)
22672 dump_die_1 (f
, level
, max_level
, die
->sibling
);
22676 /* This is called from the pdie macro in gdbinit.in.
22677 It's not static so gcc will keep a copy callable from gdb. */
22680 dump_die (struct die_info
*die
, int max_level
)
22682 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
22686 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
22690 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
22691 to_underlying (die
->sect_off
),
22697 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
22701 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
22703 if (attr_form_is_ref (attr
))
22704 return (sect_offset
) DW_UNSND (attr
);
22706 complaint (_("unsupported die ref attribute form: '%s'"),
22707 dwarf_form_name (attr
->form
));
22711 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
22712 * the value held by the attribute is not constant. */
22715 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
22717 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
22718 return DW_SND (attr
);
22719 else if (attr
->form
== DW_FORM_udata
22720 || attr
->form
== DW_FORM_data1
22721 || attr
->form
== DW_FORM_data2
22722 || attr
->form
== DW_FORM_data4
22723 || attr
->form
== DW_FORM_data8
)
22724 return DW_UNSND (attr
);
22727 /* For DW_FORM_data16 see attr_form_is_constant. */
22728 complaint (_("Attribute value is not a constant (%s)"),
22729 dwarf_form_name (attr
->form
));
22730 return default_value
;
22734 /* Follow reference or signature attribute ATTR of SRC_DIE.
22735 On entry *REF_CU is the CU of SRC_DIE.
22736 On exit *REF_CU is the CU of the result. */
22738 static struct die_info
*
22739 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22740 struct dwarf2_cu
**ref_cu
)
22742 struct die_info
*die
;
22744 if (attr_form_is_ref (attr
))
22745 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22746 else if (attr
->form
== DW_FORM_ref_sig8
)
22747 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22750 dump_die_for_error (src_die
);
22751 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22752 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22758 /* Follow reference OFFSET.
22759 On entry *REF_CU is the CU of the source die referencing OFFSET.
22760 On exit *REF_CU is the CU of the result.
22761 Returns NULL if OFFSET is invalid. */
22763 static struct die_info
*
22764 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22765 struct dwarf2_cu
**ref_cu
)
22767 struct die_info temp_die
;
22768 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22769 struct dwarf2_per_objfile
*dwarf2_per_objfile
22770 = cu
->per_cu
->dwarf2_per_objfile
;
22772 gdb_assert (cu
->per_cu
!= NULL
);
22776 if (cu
->per_cu
->is_debug_types
)
22778 /* .debug_types CUs cannot reference anything outside their CU.
22779 If they need to, they have to reference a signatured type via
22780 DW_FORM_ref_sig8. */
22781 if (!offset_in_cu_p (&cu
->header
, sect_off
))
22784 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22785 || !offset_in_cu_p (&cu
->header
, sect_off
))
22787 struct dwarf2_per_cu_data
*per_cu
;
22789 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22790 dwarf2_per_objfile
);
22792 /* If necessary, add it to the queue and load its DIEs. */
22793 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
22794 load_full_comp_unit (per_cu
, false, cu
->language
);
22796 target_cu
= per_cu
->cu
;
22798 else if (cu
->dies
== NULL
)
22800 /* We're loading full DIEs during partial symbol reading. */
22801 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
22802 load_full_comp_unit (cu
->per_cu
, false, language_minimal
);
22805 *ref_cu
= target_cu
;
22806 temp_die
.sect_off
= sect_off
;
22807 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22809 to_underlying (sect_off
));
22812 /* Follow reference attribute ATTR of SRC_DIE.
22813 On entry *REF_CU is the CU of SRC_DIE.
22814 On exit *REF_CU is the CU of the result. */
22816 static struct die_info
*
22817 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22818 struct dwarf2_cu
**ref_cu
)
22820 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22821 struct dwarf2_cu
*cu
= *ref_cu
;
22822 struct die_info
*die
;
22824 die
= follow_die_offset (sect_off
,
22825 (attr
->form
== DW_FORM_GNU_ref_alt
22826 || cu
->per_cu
->is_dwz
),
22829 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
22830 "at %s [in module %s]"),
22831 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
22832 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
22837 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
22838 Returned value is intended for DW_OP_call*. Returned
22839 dwarf2_locexpr_baton->data has lifetime of
22840 PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */
22842 struct dwarf2_locexpr_baton
22843 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
22844 struct dwarf2_per_cu_data
*per_cu
,
22845 CORE_ADDR (*get_frame_pc
) (void *baton
),
22848 struct dwarf2_cu
*cu
;
22849 struct die_info
*die
;
22850 struct attribute
*attr
;
22851 struct dwarf2_locexpr_baton retval
;
22852 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
22853 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22855 if (per_cu
->cu
== NULL
)
22856 load_cu (per_cu
, false);
22860 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22861 Instead just throw an error, not much else we can do. */
22862 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22863 sect_offset_str (sect_off
), objfile_name (objfile
));
22866 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22868 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22869 sect_offset_str (sect_off
), objfile_name (objfile
));
22871 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22874 /* DWARF: "If there is no such attribute, then there is no effect.".
22875 DATA is ignored if SIZE is 0. */
22877 retval
.data
= NULL
;
22880 else if (attr_form_is_section_offset (attr
))
22882 struct dwarf2_loclist_baton loclist_baton
;
22883 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22886 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
22888 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
22890 retval
.size
= size
;
22894 if (!attr_form_is_block (attr
))
22895 error (_("Dwarf Error: DIE at %s referenced in module %s "
22896 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
22897 sect_offset_str (sect_off
), objfile_name (objfile
));
22899 retval
.data
= DW_BLOCK (attr
)->data
;
22900 retval
.size
= DW_BLOCK (attr
)->size
;
22902 retval
.per_cu
= cu
->per_cu
;
22904 age_cached_comp_units (dwarf2_per_objfile
);
22909 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
22912 struct dwarf2_locexpr_baton
22913 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
22914 struct dwarf2_per_cu_data
*per_cu
,
22915 CORE_ADDR (*get_frame_pc
) (void *baton
),
22918 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
22920 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
22923 /* Write a constant of a given type as target-ordered bytes into
22926 static const gdb_byte
*
22927 write_constant_as_bytes (struct obstack
*obstack
,
22928 enum bfd_endian byte_order
,
22935 *len
= TYPE_LENGTH (type
);
22936 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22937 store_unsigned_integer (result
, *len
, byte_order
, value
);
22942 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
22943 pointer to the constant bytes and set LEN to the length of the
22944 data. If memory is needed, allocate it on OBSTACK. If the DIE
22945 does not have a DW_AT_const_value, return NULL. */
22948 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
22949 struct dwarf2_per_cu_data
*per_cu
,
22950 struct obstack
*obstack
,
22953 struct dwarf2_cu
*cu
;
22954 struct die_info
*die
;
22955 struct attribute
*attr
;
22956 const gdb_byte
*result
= NULL
;
22959 enum bfd_endian byte_order
;
22960 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
22962 if (per_cu
->cu
== NULL
)
22963 load_cu (per_cu
, false);
22967 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22968 Instead just throw an error, not much else we can do. */
22969 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22970 sect_offset_str (sect_off
), objfile_name (objfile
));
22973 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22975 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22976 sect_offset_str (sect_off
), objfile_name (objfile
));
22978 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
22982 byte_order
= (bfd_big_endian (objfile
->obfd
)
22983 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
22985 switch (attr
->form
)
22988 case DW_FORM_GNU_addr_index
:
22992 *len
= cu
->header
.addr_size
;
22993 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22994 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
22998 case DW_FORM_string
:
23000 case DW_FORM_GNU_str_index
:
23001 case DW_FORM_GNU_strp_alt
:
23002 /* DW_STRING is already allocated on the objfile obstack, point
23004 result
= (const gdb_byte
*) DW_STRING (attr
);
23005 *len
= strlen (DW_STRING (attr
));
23007 case DW_FORM_block1
:
23008 case DW_FORM_block2
:
23009 case DW_FORM_block4
:
23010 case DW_FORM_block
:
23011 case DW_FORM_exprloc
:
23012 case DW_FORM_data16
:
23013 result
= DW_BLOCK (attr
)->data
;
23014 *len
= DW_BLOCK (attr
)->size
;
23017 /* The DW_AT_const_value attributes are supposed to carry the
23018 symbol's value "represented as it would be on the target
23019 architecture." By the time we get here, it's already been
23020 converted to host endianness, so we just need to sign- or
23021 zero-extend it as appropriate. */
23022 case DW_FORM_data1
:
23023 type
= die_type (die
, cu
);
23024 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
23025 if (result
== NULL
)
23026 result
= write_constant_as_bytes (obstack
, byte_order
,
23029 case DW_FORM_data2
:
23030 type
= die_type (die
, cu
);
23031 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
23032 if (result
== NULL
)
23033 result
= write_constant_as_bytes (obstack
, byte_order
,
23036 case DW_FORM_data4
:
23037 type
= die_type (die
, cu
);
23038 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
23039 if (result
== NULL
)
23040 result
= write_constant_as_bytes (obstack
, byte_order
,
23043 case DW_FORM_data8
:
23044 type
= die_type (die
, cu
);
23045 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
23046 if (result
== NULL
)
23047 result
= write_constant_as_bytes (obstack
, byte_order
,
23051 case DW_FORM_sdata
:
23052 case DW_FORM_implicit_const
:
23053 type
= die_type (die
, cu
);
23054 result
= write_constant_as_bytes (obstack
, byte_order
,
23055 type
, DW_SND (attr
), len
);
23058 case DW_FORM_udata
:
23059 type
= die_type (die
, cu
);
23060 result
= write_constant_as_bytes (obstack
, byte_order
,
23061 type
, DW_UNSND (attr
), len
);
23065 complaint (_("unsupported const value attribute form: '%s'"),
23066 dwarf_form_name (attr
->form
));
23073 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
23074 valid type for this die is found. */
23077 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
23078 struct dwarf2_per_cu_data
*per_cu
)
23080 struct dwarf2_cu
*cu
;
23081 struct die_info
*die
;
23083 if (per_cu
->cu
== NULL
)
23084 load_cu (per_cu
, false);
23089 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23093 return die_type (die
, cu
);
23096 /* Return the type of the DIE at DIE_OFFSET in the CU named by
23100 dwarf2_get_die_type (cu_offset die_offset
,
23101 struct dwarf2_per_cu_data
*per_cu
)
23103 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
23104 return get_die_type_at_offset (die_offset_sect
, per_cu
);
23107 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
23108 On entry *REF_CU is the CU of SRC_DIE.
23109 On exit *REF_CU is the CU of the result.
23110 Returns NULL if the referenced DIE isn't found. */
23112 static struct die_info
*
23113 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
23114 struct dwarf2_cu
**ref_cu
)
23116 struct die_info temp_die
;
23117 struct dwarf2_cu
*sig_cu
;
23118 struct die_info
*die
;
23120 /* While it might be nice to assert sig_type->type == NULL here,
23121 we can get here for DW_AT_imported_declaration where we need
23122 the DIE not the type. */
23124 /* If necessary, add it to the queue and load its DIEs. */
23126 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
23127 read_signatured_type (sig_type
);
23129 sig_cu
= sig_type
->per_cu
.cu
;
23130 gdb_assert (sig_cu
!= NULL
);
23131 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
23132 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
23133 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
23134 to_underlying (temp_die
.sect_off
));
23137 struct dwarf2_per_objfile
*dwarf2_per_objfile
23138 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
23140 /* For .gdb_index version 7 keep track of included TUs.
23141 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
23142 if (dwarf2_per_objfile
->index_table
!= NULL
23143 && dwarf2_per_objfile
->index_table
->version
<= 7)
23145 VEC_safe_push (dwarf2_per_cu_ptr
,
23146 (*ref_cu
)->per_cu
->imported_symtabs
,
23157 /* Follow signatured type referenced by ATTR in SRC_DIE.
23158 On entry *REF_CU is the CU of SRC_DIE.
23159 On exit *REF_CU is the CU of the result.
23160 The result is the DIE of the type.
23161 If the referenced type cannot be found an error is thrown. */
23163 static struct die_info
*
23164 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23165 struct dwarf2_cu
**ref_cu
)
23167 ULONGEST signature
= DW_SIGNATURE (attr
);
23168 struct signatured_type
*sig_type
;
23169 struct die_info
*die
;
23171 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
23173 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
23174 /* sig_type will be NULL if the signatured type is missing from
23176 if (sig_type
== NULL
)
23178 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23179 " from DIE at %s [in module %s]"),
23180 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23181 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23184 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
23187 dump_die_for_error (src_die
);
23188 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23189 " from DIE at %s [in module %s]"),
23190 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23191 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23197 /* Get the type specified by SIGNATURE referenced in DIE/CU,
23198 reading in and processing the type unit if necessary. */
23200 static struct type
*
23201 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
23202 struct dwarf2_cu
*cu
)
23204 struct dwarf2_per_objfile
*dwarf2_per_objfile
23205 = cu
->per_cu
->dwarf2_per_objfile
;
23206 struct signatured_type
*sig_type
;
23207 struct dwarf2_cu
*type_cu
;
23208 struct die_info
*type_die
;
23211 sig_type
= lookup_signatured_type (cu
, signature
);
23212 /* sig_type will be NULL if the signatured type is missing from
23214 if (sig_type
== NULL
)
23216 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23217 " from DIE at %s [in module %s]"),
23218 hex_string (signature
), sect_offset_str (die
->sect_off
),
23219 objfile_name (dwarf2_per_objfile
->objfile
));
23220 return build_error_marker_type (cu
, die
);
23223 /* If we already know the type we're done. */
23224 if (sig_type
->type
!= NULL
)
23225 return sig_type
->type
;
23228 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
23229 if (type_die
!= NULL
)
23231 /* N.B. We need to call get_die_type to ensure only one type for this DIE
23232 is created. This is important, for example, because for c++ classes
23233 we need TYPE_NAME set which is only done by new_symbol. Blech. */
23234 type
= read_type_die (type_die
, type_cu
);
23237 complaint (_("Dwarf Error: Cannot build signatured type %s"
23238 " referenced from DIE at %s [in module %s]"),
23239 hex_string (signature
), sect_offset_str (die
->sect_off
),
23240 objfile_name (dwarf2_per_objfile
->objfile
));
23241 type
= build_error_marker_type (cu
, die
);
23246 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23247 " from DIE at %s [in module %s]"),
23248 hex_string (signature
), sect_offset_str (die
->sect_off
),
23249 objfile_name (dwarf2_per_objfile
->objfile
));
23250 type
= build_error_marker_type (cu
, die
);
23252 sig_type
->type
= type
;
23257 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
23258 reading in and processing the type unit if necessary. */
23260 static struct type
*
23261 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
23262 struct dwarf2_cu
*cu
) /* ARI: editCase function */
23264 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
23265 if (attr_form_is_ref (attr
))
23267 struct dwarf2_cu
*type_cu
= cu
;
23268 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
23270 return read_type_die (type_die
, type_cu
);
23272 else if (attr
->form
== DW_FORM_ref_sig8
)
23274 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
23278 struct dwarf2_per_objfile
*dwarf2_per_objfile
23279 = cu
->per_cu
->dwarf2_per_objfile
;
23281 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
23282 " at %s [in module %s]"),
23283 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
23284 objfile_name (dwarf2_per_objfile
->objfile
));
23285 return build_error_marker_type (cu
, die
);
23289 /* Load the DIEs associated with type unit PER_CU into memory. */
23292 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
23294 struct signatured_type
*sig_type
;
23296 /* Caller is responsible for ensuring type_unit_groups don't get here. */
23297 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
23299 /* We have the per_cu, but we need the signatured_type.
23300 Fortunately this is an easy translation. */
23301 gdb_assert (per_cu
->is_debug_types
);
23302 sig_type
= (struct signatured_type
*) per_cu
;
23304 gdb_assert (per_cu
->cu
== NULL
);
23306 read_signatured_type (sig_type
);
23308 gdb_assert (per_cu
->cu
!= NULL
);
23311 /* die_reader_func for read_signatured_type.
23312 This is identical to load_full_comp_unit_reader,
23313 but is kept separate for now. */
23316 read_signatured_type_reader (const struct die_reader_specs
*reader
,
23317 const gdb_byte
*info_ptr
,
23318 struct die_info
*comp_unit_die
,
23322 struct dwarf2_cu
*cu
= reader
->cu
;
23324 gdb_assert (cu
->die_hash
== NULL
);
23326 htab_create_alloc_ex (cu
->header
.length
/ 12,
23330 &cu
->comp_unit_obstack
,
23331 hashtab_obstack_allocate
,
23332 dummy_obstack_deallocate
);
23335 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
23336 &info_ptr
, comp_unit_die
);
23337 cu
->dies
= comp_unit_die
;
23338 /* comp_unit_die is not stored in die_hash, no need. */
23340 /* We try not to read any attributes in this function, because not
23341 all CUs needed for references have been loaded yet, and symbol
23342 table processing isn't initialized. But we have to set the CU language,
23343 or we won't be able to build types correctly.
23344 Similarly, if we do not read the producer, we can not apply
23345 producer-specific interpretation. */
23346 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
23349 /* Read in a signatured type and build its CU and DIEs.
23350 If the type is a stub for the real type in a DWO file,
23351 read in the real type from the DWO file as well. */
23354 read_signatured_type (struct signatured_type
*sig_type
)
23356 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
23358 gdb_assert (per_cu
->is_debug_types
);
23359 gdb_assert (per_cu
->cu
== NULL
);
23361 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1, false,
23362 read_signatured_type_reader
, NULL
);
23363 sig_type
->per_cu
.tu_read
= 1;
23366 /* Decode simple location descriptions.
23367 Given a pointer to a dwarf block that defines a location, compute
23368 the location and return the value.
23370 NOTE drow/2003-11-18: This function is called in two situations
23371 now: for the address of static or global variables (partial symbols
23372 only) and for offsets into structures which are expected to be
23373 (more or less) constant. The partial symbol case should go away,
23374 and only the constant case should remain. That will let this
23375 function complain more accurately. A few special modes are allowed
23376 without complaint for global variables (for instance, global
23377 register values and thread-local values).
23379 A location description containing no operations indicates that the
23380 object is optimized out. The return value is 0 for that case.
23381 FIXME drow/2003-11-16: No callers check for this case any more; soon all
23382 callers will only want a very basic result and this can become a
23385 Note that stack[0] is unused except as a default error return. */
23388 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
23390 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
23392 size_t size
= blk
->size
;
23393 const gdb_byte
*data
= blk
->data
;
23394 CORE_ADDR stack
[64];
23396 unsigned int bytes_read
, unsnd
;
23402 stack
[++stacki
] = 0;
23441 stack
[++stacki
] = op
- DW_OP_lit0
;
23476 stack
[++stacki
] = op
- DW_OP_reg0
;
23478 dwarf2_complex_location_expr_complaint ();
23482 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
23484 stack
[++stacki
] = unsnd
;
23486 dwarf2_complex_location_expr_complaint ();
23490 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
23495 case DW_OP_const1u
:
23496 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
23500 case DW_OP_const1s
:
23501 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
23505 case DW_OP_const2u
:
23506 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
23510 case DW_OP_const2s
:
23511 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
23515 case DW_OP_const4u
:
23516 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
23520 case DW_OP_const4s
:
23521 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
23525 case DW_OP_const8u
:
23526 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
23531 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
23537 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
23542 stack
[stacki
+ 1] = stack
[stacki
];
23547 stack
[stacki
- 1] += stack
[stacki
];
23551 case DW_OP_plus_uconst
:
23552 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
23558 stack
[stacki
- 1] -= stack
[stacki
];
23563 /* If we're not the last op, then we definitely can't encode
23564 this using GDB's address_class enum. This is valid for partial
23565 global symbols, although the variable's address will be bogus
23568 dwarf2_complex_location_expr_complaint ();
23571 case DW_OP_GNU_push_tls_address
:
23572 case DW_OP_form_tls_address
:
23573 /* The top of the stack has the offset from the beginning
23574 of the thread control block at which the variable is located. */
23575 /* Nothing should follow this operator, so the top of stack would
23577 /* This is valid for partial global symbols, but the variable's
23578 address will be bogus in the psymtab. Make it always at least
23579 non-zero to not look as a variable garbage collected by linker
23580 which have DW_OP_addr 0. */
23582 dwarf2_complex_location_expr_complaint ();
23586 case DW_OP_GNU_uninit
:
23589 case DW_OP_GNU_addr_index
:
23590 case DW_OP_GNU_const_index
:
23591 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
23598 const char *name
= get_DW_OP_name (op
);
23601 complaint (_("unsupported stack op: '%s'"),
23604 complaint (_("unsupported stack op: '%02x'"),
23608 return (stack
[stacki
]);
23611 /* Enforce maximum stack depth of SIZE-1 to avoid writing
23612 outside of the allocated space. Also enforce minimum>0. */
23613 if (stacki
>= ARRAY_SIZE (stack
) - 1)
23615 complaint (_("location description stack overflow"));
23621 complaint (_("location description stack underflow"));
23625 return (stack
[stacki
]);
23628 /* memory allocation interface */
23630 static struct dwarf_block
*
23631 dwarf_alloc_block (struct dwarf2_cu
*cu
)
23633 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
23636 static struct die_info
*
23637 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
23639 struct die_info
*die
;
23640 size_t size
= sizeof (struct die_info
);
23643 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
23645 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
23646 memset (die
, 0, sizeof (struct die_info
));
23651 /* Macro support. */
23653 /* Return file name relative to the compilation directory of file number I in
23654 *LH's file name table. The result is allocated using xmalloc; the caller is
23655 responsible for freeing it. */
23658 file_file_name (int file
, struct line_header
*lh
)
23660 /* Is the file number a valid index into the line header's file name
23661 table? Remember that file numbers start with one, not zero. */
23662 if (1 <= file
&& file
<= lh
->file_names
.size ())
23664 const file_entry
&fe
= lh
->file_names
[file
- 1];
23666 if (!IS_ABSOLUTE_PATH (fe
.name
))
23668 const char *dir
= fe
.include_dir (lh
);
23670 return concat (dir
, SLASH_STRING
, fe
.name
, (char *) NULL
);
23672 return xstrdup (fe
.name
);
23676 /* The compiler produced a bogus file number. We can at least
23677 record the macro definitions made in the file, even if we
23678 won't be able to find the file by name. */
23679 char fake_name
[80];
23681 xsnprintf (fake_name
, sizeof (fake_name
),
23682 "<bad macro file number %d>", file
);
23684 complaint (_("bad file number in macro information (%d)"),
23687 return xstrdup (fake_name
);
23691 /* Return the full name of file number I in *LH's file name table.
23692 Use COMP_DIR as the name of the current directory of the
23693 compilation. The result is allocated using xmalloc; the caller is
23694 responsible for freeing it. */
23696 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
23698 /* Is the file number a valid index into the line header's file name
23699 table? Remember that file numbers start with one, not zero. */
23700 if (1 <= file
&& file
<= lh
->file_names
.size ())
23702 char *relative
= file_file_name (file
, lh
);
23704 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
23706 return reconcat (relative
, comp_dir
, SLASH_STRING
,
23707 relative
, (char *) NULL
);
23710 return file_file_name (file
, lh
);
23714 static struct macro_source_file
*
23715 macro_start_file (int file
, int line
,
23716 struct macro_source_file
*current_file
,
23717 struct line_header
*lh
)
23719 /* File name relative to the compilation directory of this source file. */
23720 char *file_name
= file_file_name (file
, lh
);
23722 if (! current_file
)
23724 /* Note: We don't create a macro table for this compilation unit
23725 at all until we actually get a filename. */
23726 struct macro_table
*macro_table
= get_macro_table ();
23728 /* If we have no current file, then this must be the start_file
23729 directive for the compilation unit's main source file. */
23730 current_file
= macro_set_main (macro_table
, file_name
);
23731 macro_define_special (macro_table
);
23734 current_file
= macro_include (current_file
, line
, file_name
);
23738 return current_file
;
23741 static const char *
23742 consume_improper_spaces (const char *p
, const char *body
)
23746 complaint (_("macro definition contains spaces "
23747 "in formal argument list:\n`%s'"),
23759 parse_macro_definition (struct macro_source_file
*file
, int line
,
23764 /* The body string takes one of two forms. For object-like macro
23765 definitions, it should be:
23767 <macro name> " " <definition>
23769 For function-like macro definitions, it should be:
23771 <macro name> "() " <definition>
23773 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
23775 Spaces may appear only where explicitly indicated, and in the
23778 The Dwarf 2 spec says that an object-like macro's name is always
23779 followed by a space, but versions of GCC around March 2002 omit
23780 the space when the macro's definition is the empty string.
23782 The Dwarf 2 spec says that there should be no spaces between the
23783 formal arguments in a function-like macro's formal argument list,
23784 but versions of GCC around March 2002 include spaces after the
23788 /* Find the extent of the macro name. The macro name is terminated
23789 by either a space or null character (for an object-like macro) or
23790 an opening paren (for a function-like macro). */
23791 for (p
= body
; *p
; p
++)
23792 if (*p
== ' ' || *p
== '(')
23795 if (*p
== ' ' || *p
== '\0')
23797 /* It's an object-like macro. */
23798 int name_len
= p
- body
;
23799 char *name
= savestring (body
, name_len
);
23800 const char *replacement
;
23803 replacement
= body
+ name_len
+ 1;
23806 dwarf2_macro_malformed_definition_complaint (body
);
23807 replacement
= body
+ name_len
;
23810 macro_define_object (file
, line
, name
, replacement
);
23814 else if (*p
== '(')
23816 /* It's a function-like macro. */
23817 char *name
= savestring (body
, p
- body
);
23820 char **argv
= XNEWVEC (char *, argv_size
);
23824 p
= consume_improper_spaces (p
, body
);
23826 /* Parse the formal argument list. */
23827 while (*p
&& *p
!= ')')
23829 /* Find the extent of the current argument name. */
23830 const char *arg_start
= p
;
23832 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
23835 if (! *p
|| p
== arg_start
)
23836 dwarf2_macro_malformed_definition_complaint (body
);
23839 /* Make sure argv has room for the new argument. */
23840 if (argc
>= argv_size
)
23843 argv
= XRESIZEVEC (char *, argv
, argv_size
);
23846 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
23849 p
= consume_improper_spaces (p
, body
);
23851 /* Consume the comma, if present. */
23856 p
= consume_improper_spaces (p
, body
);
23865 /* Perfectly formed definition, no complaints. */
23866 macro_define_function (file
, line
, name
,
23867 argc
, (const char **) argv
,
23869 else if (*p
== '\0')
23871 /* Complain, but do define it. */
23872 dwarf2_macro_malformed_definition_complaint (body
);
23873 macro_define_function (file
, line
, name
,
23874 argc
, (const char **) argv
,
23878 /* Just complain. */
23879 dwarf2_macro_malformed_definition_complaint (body
);
23882 /* Just complain. */
23883 dwarf2_macro_malformed_definition_complaint (body
);
23889 for (i
= 0; i
< argc
; i
++)
23895 dwarf2_macro_malformed_definition_complaint (body
);
23898 /* Skip some bytes from BYTES according to the form given in FORM.
23899 Returns the new pointer. */
23901 static const gdb_byte
*
23902 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
23903 enum dwarf_form form
,
23904 unsigned int offset_size
,
23905 struct dwarf2_section_info
*section
)
23907 unsigned int bytes_read
;
23911 case DW_FORM_data1
:
23916 case DW_FORM_data2
:
23920 case DW_FORM_data4
:
23924 case DW_FORM_data8
:
23928 case DW_FORM_data16
:
23932 case DW_FORM_string
:
23933 read_direct_string (abfd
, bytes
, &bytes_read
);
23934 bytes
+= bytes_read
;
23937 case DW_FORM_sec_offset
:
23939 case DW_FORM_GNU_strp_alt
:
23940 bytes
+= offset_size
;
23943 case DW_FORM_block
:
23944 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
23945 bytes
+= bytes_read
;
23948 case DW_FORM_block1
:
23949 bytes
+= 1 + read_1_byte (abfd
, bytes
);
23951 case DW_FORM_block2
:
23952 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
23954 case DW_FORM_block4
:
23955 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
23958 case DW_FORM_sdata
:
23959 case DW_FORM_udata
:
23960 case DW_FORM_GNU_addr_index
:
23961 case DW_FORM_GNU_str_index
:
23962 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
23965 dwarf2_section_buffer_overflow_complaint (section
);
23970 case DW_FORM_implicit_const
:
23975 complaint (_("invalid form 0x%x in `%s'"),
23976 form
, get_section_name (section
));
23984 /* A helper for dwarf_decode_macros that handles skipping an unknown
23985 opcode. Returns an updated pointer to the macro data buffer; or,
23986 on error, issues a complaint and returns NULL. */
23988 static const gdb_byte
*
23989 skip_unknown_opcode (unsigned int opcode
,
23990 const gdb_byte
**opcode_definitions
,
23991 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
23993 unsigned int offset_size
,
23994 struct dwarf2_section_info
*section
)
23996 unsigned int bytes_read
, i
;
23998 const gdb_byte
*defn
;
24000 if (opcode_definitions
[opcode
] == NULL
)
24002 complaint (_("unrecognized DW_MACFINO opcode 0x%x"),
24007 defn
= opcode_definitions
[opcode
];
24008 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
24009 defn
+= bytes_read
;
24011 for (i
= 0; i
< arg
; ++i
)
24013 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
24014 (enum dwarf_form
) defn
[i
], offset_size
,
24016 if (mac_ptr
== NULL
)
24018 /* skip_form_bytes already issued the complaint. */
24026 /* A helper function which parses the header of a macro section.
24027 If the macro section is the extended (for now called "GNU") type,
24028 then this updates *OFFSET_SIZE. Returns a pointer to just after
24029 the header, or issues a complaint and returns NULL on error. */
24031 static const gdb_byte
*
24032 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
24034 const gdb_byte
*mac_ptr
,
24035 unsigned int *offset_size
,
24036 int section_is_gnu
)
24038 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
24040 if (section_is_gnu
)
24042 unsigned int version
, flags
;
24044 version
= read_2_bytes (abfd
, mac_ptr
);
24045 if (version
!= 4 && version
!= 5)
24047 complaint (_("unrecognized version `%d' in .debug_macro section"),
24053 flags
= read_1_byte (abfd
, mac_ptr
);
24055 *offset_size
= (flags
& 1) ? 8 : 4;
24057 if ((flags
& 2) != 0)
24058 /* We don't need the line table offset. */
24059 mac_ptr
+= *offset_size
;
24061 /* Vendor opcode descriptions. */
24062 if ((flags
& 4) != 0)
24064 unsigned int i
, count
;
24066 count
= read_1_byte (abfd
, mac_ptr
);
24068 for (i
= 0; i
< count
; ++i
)
24070 unsigned int opcode
, bytes_read
;
24073 opcode
= read_1_byte (abfd
, mac_ptr
);
24075 opcode_definitions
[opcode
] = mac_ptr
;
24076 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24077 mac_ptr
+= bytes_read
;
24086 /* A helper for dwarf_decode_macros that handles the GNU extensions,
24087 including DW_MACRO_import. */
24090 dwarf_decode_macro_bytes (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
24092 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24093 struct macro_source_file
*current_file
,
24094 struct line_header
*lh
,
24095 struct dwarf2_section_info
*section
,
24096 int section_is_gnu
, int section_is_dwz
,
24097 unsigned int offset_size
,
24098 htab_t include_hash
)
24100 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24101 enum dwarf_macro_record_type macinfo_type
;
24102 int at_commandline
;
24103 const gdb_byte
*opcode_definitions
[256];
24105 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24106 &offset_size
, section_is_gnu
);
24107 if (mac_ptr
== NULL
)
24109 /* We already issued a complaint. */
24113 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
24114 GDB is still reading the definitions from command line. First
24115 DW_MACINFO_start_file will need to be ignored as it was already executed
24116 to create CURRENT_FILE for the main source holding also the command line
24117 definitions. On first met DW_MACINFO_start_file this flag is reset to
24118 normally execute all the remaining DW_MACINFO_start_file macinfos. */
24120 at_commandline
= 1;
24124 /* Do we at least have room for a macinfo type byte? */
24125 if (mac_ptr
>= mac_end
)
24127 dwarf2_section_buffer_overflow_complaint (section
);
24131 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24134 /* Note that we rely on the fact that the corresponding GNU and
24135 DWARF constants are the same. */
24137 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24138 switch (macinfo_type
)
24140 /* A zero macinfo type indicates the end of the macro
24145 case DW_MACRO_define
:
24146 case DW_MACRO_undef
:
24147 case DW_MACRO_define_strp
:
24148 case DW_MACRO_undef_strp
:
24149 case DW_MACRO_define_sup
:
24150 case DW_MACRO_undef_sup
:
24152 unsigned int bytes_read
;
24157 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24158 mac_ptr
+= bytes_read
;
24160 if (macinfo_type
== DW_MACRO_define
24161 || macinfo_type
== DW_MACRO_undef
)
24163 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24164 mac_ptr
+= bytes_read
;
24168 LONGEST str_offset
;
24170 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24171 mac_ptr
+= offset_size
;
24173 if (macinfo_type
== DW_MACRO_define_sup
24174 || macinfo_type
== DW_MACRO_undef_sup
24177 struct dwz_file
*dwz
24178 = dwarf2_get_dwz_file (dwarf2_per_objfile
);
24180 body
= read_indirect_string_from_dwz (objfile
,
24184 body
= read_indirect_string_at_offset (dwarf2_per_objfile
,
24188 is_define
= (macinfo_type
== DW_MACRO_define
24189 || macinfo_type
== DW_MACRO_define_strp
24190 || macinfo_type
== DW_MACRO_define_sup
);
24191 if (! current_file
)
24193 /* DWARF violation as no main source is present. */
24194 complaint (_("debug info with no main source gives macro %s "
24196 is_define
? _("definition") : _("undefinition"),
24200 if ((line
== 0 && !at_commandline
)
24201 || (line
!= 0 && at_commandline
))
24202 complaint (_("debug info gives %s macro %s with %s line %d: %s"),
24203 at_commandline
? _("command-line") : _("in-file"),
24204 is_define
? _("definition") : _("undefinition"),
24205 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
24208 parse_macro_definition (current_file
, line
, body
);
24211 gdb_assert (macinfo_type
== DW_MACRO_undef
24212 || macinfo_type
== DW_MACRO_undef_strp
24213 || macinfo_type
== DW_MACRO_undef_sup
);
24214 macro_undef (current_file
, line
, body
);
24219 case DW_MACRO_start_file
:
24221 unsigned int bytes_read
;
24224 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24225 mac_ptr
+= bytes_read
;
24226 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24227 mac_ptr
+= bytes_read
;
24229 if ((line
== 0 && !at_commandline
)
24230 || (line
!= 0 && at_commandline
))
24231 complaint (_("debug info gives source %d included "
24232 "from %s at %s line %d"),
24233 file
, at_commandline
? _("command-line") : _("file"),
24234 line
== 0 ? _("zero") : _("non-zero"), line
);
24236 if (at_commandline
)
24238 /* This DW_MACRO_start_file was executed in the
24240 at_commandline
= 0;
24243 current_file
= macro_start_file (file
, line
, current_file
, lh
);
24247 case DW_MACRO_end_file
:
24248 if (! current_file
)
24249 complaint (_("macro debug info has an unmatched "
24250 "`close_file' directive"));
24253 current_file
= current_file
->included_by
;
24254 if (! current_file
)
24256 enum dwarf_macro_record_type next_type
;
24258 /* GCC circa March 2002 doesn't produce the zero
24259 type byte marking the end of the compilation
24260 unit. Complain if it's not there, but exit no
24263 /* Do we at least have room for a macinfo type byte? */
24264 if (mac_ptr
>= mac_end
)
24266 dwarf2_section_buffer_overflow_complaint (section
);
24270 /* We don't increment mac_ptr here, so this is just
24273 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
24275 if (next_type
!= 0)
24276 complaint (_("no terminating 0-type entry for "
24277 "macros in `.debug_macinfo' section"));
24284 case DW_MACRO_import
:
24285 case DW_MACRO_import_sup
:
24289 bfd
*include_bfd
= abfd
;
24290 struct dwarf2_section_info
*include_section
= section
;
24291 const gdb_byte
*include_mac_end
= mac_end
;
24292 int is_dwz
= section_is_dwz
;
24293 const gdb_byte
*new_mac_ptr
;
24295 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24296 mac_ptr
+= offset_size
;
24298 if (macinfo_type
== DW_MACRO_import_sup
)
24300 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
24302 dwarf2_read_section (objfile
, &dwz
->macro
);
24304 include_section
= &dwz
->macro
;
24305 include_bfd
= get_section_bfd_owner (include_section
);
24306 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
24310 new_mac_ptr
= include_section
->buffer
+ offset
;
24311 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
24315 /* This has actually happened; see
24316 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
24317 complaint (_("recursive DW_MACRO_import in "
24318 ".debug_macro section"));
24322 *slot
= (void *) new_mac_ptr
;
24324 dwarf_decode_macro_bytes (dwarf2_per_objfile
,
24325 include_bfd
, new_mac_ptr
,
24326 include_mac_end
, current_file
, lh
,
24327 section
, section_is_gnu
, is_dwz
,
24328 offset_size
, include_hash
);
24330 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
24335 case DW_MACINFO_vendor_ext
:
24336 if (!section_is_gnu
)
24338 unsigned int bytes_read
;
24340 /* This reads the constant, but since we don't recognize
24341 any vendor extensions, we ignore it. */
24342 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24343 mac_ptr
+= bytes_read
;
24344 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24345 mac_ptr
+= bytes_read
;
24347 /* We don't recognize any vendor extensions. */
24353 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24354 mac_ptr
, mac_end
, abfd
, offset_size
,
24356 if (mac_ptr
== NULL
)
24361 } while (macinfo_type
!= 0);
24365 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
24366 int section_is_gnu
)
24368 struct dwarf2_per_objfile
*dwarf2_per_objfile
24369 = cu
->per_cu
->dwarf2_per_objfile
;
24370 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24371 struct line_header
*lh
= cu
->line_header
;
24373 const gdb_byte
*mac_ptr
, *mac_end
;
24374 struct macro_source_file
*current_file
= 0;
24375 enum dwarf_macro_record_type macinfo_type
;
24376 unsigned int offset_size
= cu
->header
.offset_size
;
24377 const gdb_byte
*opcode_definitions
[256];
24379 struct dwarf2_section_info
*section
;
24380 const char *section_name
;
24382 if (cu
->dwo_unit
!= NULL
)
24384 if (section_is_gnu
)
24386 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
24387 section_name
= ".debug_macro.dwo";
24391 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
24392 section_name
= ".debug_macinfo.dwo";
24397 if (section_is_gnu
)
24399 section
= &dwarf2_per_objfile
->macro
;
24400 section_name
= ".debug_macro";
24404 section
= &dwarf2_per_objfile
->macinfo
;
24405 section_name
= ".debug_macinfo";
24409 dwarf2_read_section (objfile
, section
);
24410 if (section
->buffer
== NULL
)
24412 complaint (_("missing %s section"), section_name
);
24415 abfd
= get_section_bfd_owner (section
);
24417 /* First pass: Find the name of the base filename.
24418 This filename is needed in order to process all macros whose definition
24419 (or undefinition) comes from the command line. These macros are defined
24420 before the first DW_MACINFO_start_file entry, and yet still need to be
24421 associated to the base file.
24423 To determine the base file name, we scan the macro definitions until we
24424 reach the first DW_MACINFO_start_file entry. We then initialize
24425 CURRENT_FILE accordingly so that any macro definition found before the
24426 first DW_MACINFO_start_file can still be associated to the base file. */
24428 mac_ptr
= section
->buffer
+ offset
;
24429 mac_end
= section
->buffer
+ section
->size
;
24431 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24432 &offset_size
, section_is_gnu
);
24433 if (mac_ptr
== NULL
)
24435 /* We already issued a complaint. */
24441 /* Do we at least have room for a macinfo type byte? */
24442 if (mac_ptr
>= mac_end
)
24444 /* Complaint is printed during the second pass as GDB will probably
24445 stop the first pass earlier upon finding
24446 DW_MACINFO_start_file. */
24450 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24453 /* Note that we rely on the fact that the corresponding GNU and
24454 DWARF constants are the same. */
24456 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24457 switch (macinfo_type
)
24459 /* A zero macinfo type indicates the end of the macro
24464 case DW_MACRO_define
:
24465 case DW_MACRO_undef
:
24466 /* Only skip the data by MAC_PTR. */
24468 unsigned int bytes_read
;
24470 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24471 mac_ptr
+= bytes_read
;
24472 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24473 mac_ptr
+= bytes_read
;
24477 case DW_MACRO_start_file
:
24479 unsigned int bytes_read
;
24482 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24483 mac_ptr
+= bytes_read
;
24484 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24485 mac_ptr
+= bytes_read
;
24487 current_file
= macro_start_file (file
, line
, current_file
, lh
);
24491 case DW_MACRO_end_file
:
24492 /* No data to skip by MAC_PTR. */
24495 case DW_MACRO_define_strp
:
24496 case DW_MACRO_undef_strp
:
24497 case DW_MACRO_define_sup
:
24498 case DW_MACRO_undef_sup
:
24500 unsigned int bytes_read
;
24502 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24503 mac_ptr
+= bytes_read
;
24504 mac_ptr
+= offset_size
;
24508 case DW_MACRO_import
:
24509 case DW_MACRO_import_sup
:
24510 /* Note that, according to the spec, a transparent include
24511 chain cannot call DW_MACRO_start_file. So, we can just
24512 skip this opcode. */
24513 mac_ptr
+= offset_size
;
24516 case DW_MACINFO_vendor_ext
:
24517 /* Only skip the data by MAC_PTR. */
24518 if (!section_is_gnu
)
24520 unsigned int bytes_read
;
24522 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24523 mac_ptr
+= bytes_read
;
24524 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24525 mac_ptr
+= bytes_read
;
24530 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24531 mac_ptr
, mac_end
, abfd
, offset_size
,
24533 if (mac_ptr
== NULL
)
24538 } while (macinfo_type
!= 0 && current_file
== NULL
);
24540 /* Second pass: Process all entries.
24542 Use the AT_COMMAND_LINE flag to determine whether we are still processing
24543 command-line macro definitions/undefinitions. This flag is unset when we
24544 reach the first DW_MACINFO_start_file entry. */
24546 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
24548 NULL
, xcalloc
, xfree
));
24549 mac_ptr
= section
->buffer
+ offset
;
24550 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
24551 *slot
= (void *) mac_ptr
;
24552 dwarf_decode_macro_bytes (dwarf2_per_objfile
,
24553 abfd
, mac_ptr
, mac_end
,
24554 current_file
, lh
, section
,
24555 section_is_gnu
, 0, offset_size
,
24556 include_hash
.get ());
24559 /* Check if the attribute's form is a DW_FORM_block*
24560 if so return true else false. */
24563 attr_form_is_block (const struct attribute
*attr
)
24565 return (attr
== NULL
? 0 :
24566 attr
->form
== DW_FORM_block1
24567 || attr
->form
== DW_FORM_block2
24568 || attr
->form
== DW_FORM_block4
24569 || attr
->form
== DW_FORM_block
24570 || attr
->form
== DW_FORM_exprloc
);
24573 /* Return non-zero if ATTR's value is a section offset --- classes
24574 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
24575 You may use DW_UNSND (attr) to retrieve such offsets.
24577 Section 7.5.4, "Attribute Encodings", explains that no attribute
24578 may have a value that belongs to more than one of these classes; it
24579 would be ambiguous if we did, because we use the same forms for all
24583 attr_form_is_section_offset (const struct attribute
*attr
)
24585 return (attr
->form
== DW_FORM_data4
24586 || attr
->form
== DW_FORM_data8
24587 || attr
->form
== DW_FORM_sec_offset
);
24590 /* Return non-zero if ATTR's value falls in the 'constant' class, or
24591 zero otherwise. When this function returns true, you can apply
24592 dwarf2_get_attr_constant_value to it.
24594 However, note that for some attributes you must check
24595 attr_form_is_section_offset before using this test. DW_FORM_data4
24596 and DW_FORM_data8 are members of both the constant class, and of
24597 the classes that contain offsets into other debug sections
24598 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
24599 that, if an attribute's can be either a constant or one of the
24600 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
24601 taken as section offsets, not constants.
24603 DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
24604 cannot handle that. */
24607 attr_form_is_constant (const struct attribute
*attr
)
24609 switch (attr
->form
)
24611 case DW_FORM_sdata
:
24612 case DW_FORM_udata
:
24613 case DW_FORM_data1
:
24614 case DW_FORM_data2
:
24615 case DW_FORM_data4
:
24616 case DW_FORM_data8
:
24617 case DW_FORM_implicit_const
:
24625 /* DW_ADDR is always stored already as sect_offset; despite for the forms
24626 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
24629 attr_form_is_ref (const struct attribute
*attr
)
24631 switch (attr
->form
)
24633 case DW_FORM_ref_addr
:
24638 case DW_FORM_ref_udata
:
24639 case DW_FORM_GNU_ref_alt
:
24646 /* Return the .debug_loc section to use for CU.
24647 For DWO files use .debug_loc.dwo. */
24649 static struct dwarf2_section_info
*
24650 cu_debug_loc_section (struct dwarf2_cu
*cu
)
24652 struct dwarf2_per_objfile
*dwarf2_per_objfile
24653 = cu
->per_cu
->dwarf2_per_objfile
;
24657 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
24659 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
24661 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
24662 : &dwarf2_per_objfile
->loc
);
24665 /* A helper function that fills in a dwarf2_loclist_baton. */
24668 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
24669 struct dwarf2_loclist_baton
*baton
,
24670 const struct attribute
*attr
)
24672 struct dwarf2_per_objfile
*dwarf2_per_objfile
24673 = cu
->per_cu
->dwarf2_per_objfile
;
24674 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24676 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
24678 baton
->per_cu
= cu
->per_cu
;
24679 gdb_assert (baton
->per_cu
);
24680 /* We don't know how long the location list is, but make sure we
24681 don't run off the edge of the section. */
24682 baton
->size
= section
->size
- DW_UNSND (attr
);
24683 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
24684 baton
->base_address
= cu
->base_address
;
24685 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
24689 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
24690 struct dwarf2_cu
*cu
, int is_block
)
24692 struct dwarf2_per_objfile
*dwarf2_per_objfile
24693 = cu
->per_cu
->dwarf2_per_objfile
;
24694 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24695 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24697 if (attr_form_is_section_offset (attr
)
24698 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
24699 the section. If so, fall through to the complaint in the
24701 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
24703 struct dwarf2_loclist_baton
*baton
;
24705 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
24707 fill_in_loclist_baton (cu
, baton
, attr
);
24709 if (cu
->base_known
== 0)
24710 complaint (_("Location list used without "
24711 "specifying the CU base address."));
24713 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24714 ? dwarf2_loclist_block_index
24715 : dwarf2_loclist_index
);
24716 SYMBOL_LOCATION_BATON (sym
) = baton
;
24720 struct dwarf2_locexpr_baton
*baton
;
24722 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
24723 baton
->per_cu
= cu
->per_cu
;
24724 gdb_assert (baton
->per_cu
);
24726 if (attr_form_is_block (attr
))
24728 /* Note that we're just copying the block's data pointer
24729 here, not the actual data. We're still pointing into the
24730 info_buffer for SYM's objfile; right now we never release
24731 that buffer, but when we do clean up properly this may
24733 baton
->size
= DW_BLOCK (attr
)->size
;
24734 baton
->data
= DW_BLOCK (attr
)->data
;
24738 dwarf2_invalid_attrib_class_complaint ("location description",
24739 SYMBOL_NATURAL_NAME (sym
));
24743 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24744 ? dwarf2_locexpr_block_index
24745 : dwarf2_locexpr_index
);
24746 SYMBOL_LOCATION_BATON (sym
) = baton
;
24750 /* Return the OBJFILE associated with the compilation unit CU. If CU
24751 came from a separate debuginfo file, then the master objfile is
24755 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
24757 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24759 /* Return the master objfile, so that we can report and look up the
24760 correct file containing this variable. */
24761 if (objfile
->separate_debug_objfile_backlink
)
24762 objfile
= objfile
->separate_debug_objfile_backlink
;
24767 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
24768 (CU_HEADERP is unused in such case) or prepare a temporary copy at
24769 CU_HEADERP first. */
24771 static const struct comp_unit_head
*
24772 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
24773 struct dwarf2_per_cu_data
*per_cu
)
24775 const gdb_byte
*info_ptr
;
24778 return &per_cu
->cu
->header
;
24780 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
24782 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
24783 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
24784 rcuh_kind::COMPILE
);
24789 /* Return the address size given in the compilation unit header for CU. */
24792 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24794 struct comp_unit_head cu_header_local
;
24795 const struct comp_unit_head
*cu_headerp
;
24797 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24799 return cu_headerp
->addr_size
;
24802 /* Return the offset size given in the compilation unit header for CU. */
24805 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
24807 struct comp_unit_head cu_header_local
;
24808 const struct comp_unit_head
*cu_headerp
;
24810 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24812 return cu_headerp
->offset_size
;
24815 /* See its dwarf2loc.h declaration. */
24818 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24820 struct comp_unit_head cu_header_local
;
24821 const struct comp_unit_head
*cu_headerp
;
24823 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24825 if (cu_headerp
->version
== 2)
24826 return cu_headerp
->addr_size
;
24828 return cu_headerp
->offset_size
;
24831 /* Return the text offset of the CU. The returned offset comes from
24832 this CU's objfile. If this objfile came from a separate debuginfo
24833 file, then the offset may be different from the corresponding
24834 offset in the parent objfile. */
24837 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
24839 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24841 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
24844 /* Return DWARF version number of PER_CU. */
24847 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
24849 return per_cu
->dwarf_version
;
24852 /* Locate the .debug_info compilation unit from CU's objfile which contains
24853 the DIE at OFFSET. Raises an error on failure. */
24855 static struct dwarf2_per_cu_data
*
24856 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
24857 unsigned int offset_in_dwz
,
24858 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
24860 struct dwarf2_per_cu_data
*this_cu
;
24862 const sect_offset
*cu_off
;
24865 high
= dwarf2_per_objfile
->all_comp_units
.size () - 1;
24868 struct dwarf2_per_cu_data
*mid_cu
;
24869 int mid
= low
+ (high
- low
) / 2;
24871 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
24872 cu_off
= &mid_cu
->sect_off
;
24873 if (mid_cu
->is_dwz
> offset_in_dwz
24874 || (mid_cu
->is_dwz
== offset_in_dwz
&& *cu_off
>= sect_off
))
24879 gdb_assert (low
== high
);
24880 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
24881 cu_off
= &this_cu
->sect_off
;
24882 if (this_cu
->is_dwz
!= offset_in_dwz
|| *cu_off
> sect_off
)
24884 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
24885 error (_("Dwarf Error: could not find partial DIE containing "
24886 "offset %s [in module %s]"),
24887 sect_offset_str (sect_off
),
24888 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
24890 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
24892 return dwarf2_per_objfile
->all_comp_units
[low
-1];
24896 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
24897 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
24898 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
24899 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
24900 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
24905 /* Initialize dwarf2_cu CU, owned by PER_CU. */
24907 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
24908 : per_cu (per_cu_
),
24911 checked_producer (0),
24912 producer_is_gxx_lt_4_6 (0),
24913 producer_is_gcc_lt_4_3 (0),
24914 producer_is_icc_lt_14 (0),
24915 processing_has_namespace_info (0)
24920 /* Destroy a dwarf2_cu. */
24922 dwarf2_cu::~dwarf2_cu ()
24927 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
24930 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
24931 enum language pretend_language
)
24933 struct attribute
*attr
;
24935 /* Set the language we're debugging. */
24936 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
24938 set_cu_language (DW_UNSND (attr
), cu
);
24941 cu
->language
= pretend_language
;
24942 cu
->language_defn
= language_def (cu
->language
);
24945 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
24948 /* Increase the age counter on each cached compilation unit, and free
24949 any that are too old. */
24952 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
24954 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
24956 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
24957 per_cu
= dwarf2_per_objfile
->read_in_chain
;
24958 while (per_cu
!= NULL
)
24960 per_cu
->cu
->last_used
++;
24961 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
24962 dwarf2_mark (per_cu
->cu
);
24963 per_cu
= per_cu
->cu
->read_in_chain
;
24966 per_cu
= dwarf2_per_objfile
->read_in_chain
;
24967 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
24968 while (per_cu
!= NULL
)
24970 struct dwarf2_per_cu_data
*next_cu
;
24972 next_cu
= per_cu
->cu
->read_in_chain
;
24974 if (!per_cu
->cu
->mark
)
24977 *last_chain
= next_cu
;
24980 last_chain
= &per_cu
->cu
->read_in_chain
;
24986 /* Remove a single compilation unit from the cache. */
24989 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
24991 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
24992 struct dwarf2_per_objfile
*dwarf2_per_objfile
24993 = target_per_cu
->dwarf2_per_objfile
;
24995 per_cu
= dwarf2_per_objfile
->read_in_chain
;
24996 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
24997 while (per_cu
!= NULL
)
24999 struct dwarf2_per_cu_data
*next_cu
;
25001 next_cu
= per_cu
->cu
->read_in_chain
;
25003 if (per_cu
== target_per_cu
)
25007 *last_chain
= next_cu
;
25011 last_chain
= &per_cu
->cu
->read_in_chain
;
25017 /* Release all extra memory associated with OBJFILE. */
25020 dwarf2_free_objfile (struct objfile
*objfile
)
25022 struct dwarf2_per_objfile
*dwarf2_per_objfile
25023 = get_dwarf2_per_objfile (objfile
);
25025 delete dwarf2_per_objfile
;
25028 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
25029 We store these in a hash table separate from the DIEs, and preserve them
25030 when the DIEs are flushed out of cache.
25032 The CU "per_cu" pointer is needed because offset alone is not enough to
25033 uniquely identify the type. A file may have multiple .debug_types sections,
25034 or the type may come from a DWO file. Furthermore, while it's more logical
25035 to use per_cu->section+offset, with Fission the section with the data is in
25036 the DWO file but we don't know that section at the point we need it.
25037 We have to use something in dwarf2_per_cu_data (or the pointer to it)
25038 because we can enter the lookup routine, get_die_type_at_offset, from
25039 outside this file, and thus won't necessarily have PER_CU->cu.
25040 Fortunately, PER_CU is stable for the life of the objfile. */
25042 struct dwarf2_per_cu_offset_and_type
25044 const struct dwarf2_per_cu_data
*per_cu
;
25045 sect_offset sect_off
;
25049 /* Hash function for a dwarf2_per_cu_offset_and_type. */
25052 per_cu_offset_and_type_hash (const void *item
)
25054 const struct dwarf2_per_cu_offset_and_type
*ofs
25055 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
25057 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
25060 /* Equality function for a dwarf2_per_cu_offset_and_type. */
25063 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
25065 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
25066 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
25067 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
25068 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
25070 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
25071 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
25074 /* Set the type associated with DIE to TYPE. Save it in CU's hash
25075 table if necessary. For convenience, return TYPE.
25077 The DIEs reading must have careful ordering to:
25078 * Not cause infite loops trying to read in DIEs as a prerequisite for
25079 reading current DIE.
25080 * Not trying to dereference contents of still incompletely read in types
25081 while reading in other DIEs.
25082 * Enable referencing still incompletely read in types just by a pointer to
25083 the type without accessing its fields.
25085 Therefore caller should follow these rules:
25086 * Try to fetch any prerequisite types we may need to build this DIE type
25087 before building the type and calling set_die_type.
25088 * After building type call set_die_type for current DIE as soon as
25089 possible before fetching more types to complete the current type.
25090 * Make the type as complete as possible before fetching more types. */
25092 static struct type
*
25093 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
25095 struct dwarf2_per_objfile
*dwarf2_per_objfile
25096 = cu
->per_cu
->dwarf2_per_objfile
;
25097 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
25098 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25099 struct attribute
*attr
;
25100 struct dynamic_prop prop
;
25102 /* For Ada types, make sure that the gnat-specific data is always
25103 initialized (if not already set). There are a few types where
25104 we should not be doing so, because the type-specific area is
25105 already used to hold some other piece of info (eg: TYPE_CODE_FLT
25106 where the type-specific area is used to store the floatformat).
25107 But this is not a problem, because the gnat-specific information
25108 is actually not needed for these types. */
25109 if (need_gnat_info (cu
)
25110 && TYPE_CODE (type
) != TYPE_CODE_FUNC
25111 && TYPE_CODE (type
) != TYPE_CODE_FLT
25112 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
25113 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
25114 && TYPE_CODE (type
) != TYPE_CODE_METHOD
25115 && !HAVE_GNAT_AUX_INFO (type
))
25116 INIT_GNAT_SPECIFIC (type
);
25118 /* Read DW_AT_allocated and set in type. */
25119 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
25120 if (attr_form_is_block (attr
))
25122 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25123 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
);
25125 else if (attr
!= NULL
)
25127 complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
25128 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25129 sect_offset_str (die
->sect_off
));
25132 /* Read DW_AT_associated and set in type. */
25133 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
25134 if (attr_form_is_block (attr
))
25136 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25137 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
);
25139 else if (attr
!= NULL
)
25141 complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
25142 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25143 sect_offset_str (die
->sect_off
));
25146 /* Read DW_AT_data_location and set in type. */
25147 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
25148 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25149 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
);
25151 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25153 dwarf2_per_objfile
->die_type_hash
=
25154 htab_create_alloc_ex (127,
25155 per_cu_offset_and_type_hash
,
25156 per_cu_offset_and_type_eq
,
25158 &objfile
->objfile_obstack
,
25159 hashtab_obstack_allocate
,
25160 dummy_obstack_deallocate
);
25163 ofs
.per_cu
= cu
->per_cu
;
25164 ofs
.sect_off
= die
->sect_off
;
25166 slot
= (struct dwarf2_per_cu_offset_and_type
**)
25167 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
25169 complaint (_("A problem internal to GDB: DIE %s has type already set"),
25170 sect_offset_str (die
->sect_off
));
25171 *slot
= XOBNEW (&objfile
->objfile_obstack
,
25172 struct dwarf2_per_cu_offset_and_type
);
25177 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
25178 or return NULL if the die does not have a saved type. */
25180 static struct type
*
25181 get_die_type_at_offset (sect_offset sect_off
,
25182 struct dwarf2_per_cu_data
*per_cu
)
25184 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
25185 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
25187 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25190 ofs
.per_cu
= per_cu
;
25191 ofs
.sect_off
= sect_off
;
25192 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
25193 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
25200 /* Look up the type for DIE in CU in die_type_hash,
25201 or return NULL if DIE does not have a saved type. */
25203 static struct type
*
25204 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
25206 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
25209 /* Add a dependence relationship from CU to REF_PER_CU. */
25212 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
25213 struct dwarf2_per_cu_data
*ref_per_cu
)
25217 if (cu
->dependencies
== NULL
)
25219 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
25220 NULL
, &cu
->comp_unit_obstack
,
25221 hashtab_obstack_allocate
,
25222 dummy_obstack_deallocate
);
25224 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
25226 *slot
= ref_per_cu
;
25229 /* Subroutine of dwarf2_mark to pass to htab_traverse.
25230 Set the mark field in every compilation unit in the
25231 cache that we must keep because we are keeping CU. */
25234 dwarf2_mark_helper (void **slot
, void *data
)
25236 struct dwarf2_per_cu_data
*per_cu
;
25238 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
25240 /* cu->dependencies references may not yet have been ever read if QUIT aborts
25241 reading of the chain. As such dependencies remain valid it is not much
25242 useful to track and undo them during QUIT cleanups. */
25243 if (per_cu
->cu
== NULL
)
25246 if (per_cu
->cu
->mark
)
25248 per_cu
->cu
->mark
= 1;
25250 if (per_cu
->cu
->dependencies
!= NULL
)
25251 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25256 /* Set the mark field in CU and in every other compilation unit in the
25257 cache that we must keep because we are keeping CU. */
25260 dwarf2_mark (struct dwarf2_cu
*cu
)
25265 if (cu
->dependencies
!= NULL
)
25266 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25270 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
25274 per_cu
->cu
->mark
= 0;
25275 per_cu
= per_cu
->cu
->read_in_chain
;
25279 /* Trivial hash function for partial_die_info: the hash value of a DIE
25280 is its offset in .debug_info for this objfile. */
25283 partial_die_hash (const void *item
)
25285 const struct partial_die_info
*part_die
25286 = (const struct partial_die_info
*) item
;
25288 return to_underlying (part_die
->sect_off
);
25291 /* Trivial comparison function for partial_die_info structures: two DIEs
25292 are equal if they have the same offset. */
25295 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
25297 const struct partial_die_info
*part_die_lhs
25298 = (const struct partial_die_info
*) item_lhs
;
25299 const struct partial_die_info
*part_die_rhs
25300 = (const struct partial_die_info
*) item_rhs
;
25302 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
25305 static struct cmd_list_element
*set_dwarf_cmdlist
;
25306 static struct cmd_list_element
*show_dwarf_cmdlist
;
25309 set_dwarf_cmd (const char *args
, int from_tty
)
25311 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
25316 show_dwarf_cmd (const char *args
, int from_tty
)
25318 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
25321 int dwarf_always_disassemble
;
25324 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
25325 struct cmd_list_element
*c
, const char *value
)
25327 fprintf_filtered (file
,
25328 _("Whether to always disassemble "
25329 "DWARF expressions is %s.\n"),
25334 show_check_physname (struct ui_file
*file
, int from_tty
,
25335 struct cmd_list_element
*c
, const char *value
)
25337 fprintf_filtered (file
,
25338 _("Whether to check \"physname\" is %s.\n"),
25343 _initialize_dwarf2_read (void)
25346 dwarf2_objfile_data_key
= register_objfile_data ();
25348 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
25349 Set DWARF specific variables.\n\
25350 Configure DWARF variables such as the cache size"),
25351 &set_dwarf_cmdlist
, "maintenance set dwarf ",
25352 0/*allow-unknown*/, &maintenance_set_cmdlist
);
25354 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
25355 Show DWARF specific variables\n\
25356 Show DWARF variables such as the cache size"),
25357 &show_dwarf_cmdlist
, "maintenance show dwarf ",
25358 0/*allow-unknown*/, &maintenance_show_cmdlist
);
25360 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
25361 &dwarf_max_cache_age
, _("\
25362 Set the upper bound on the age of cached DWARF compilation units."), _("\
25363 Show the upper bound on the age of cached DWARF compilation units."), _("\
25364 A higher limit means that cached compilation units will be stored\n\
25365 in memory longer, and more total memory will be used. Zero disables\n\
25366 caching, which can slow down startup."),
25368 show_dwarf_max_cache_age
,
25369 &set_dwarf_cmdlist
,
25370 &show_dwarf_cmdlist
);
25372 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
25373 &dwarf_always_disassemble
, _("\
25374 Set whether `info address' always disassembles DWARF expressions."), _("\
25375 Show whether `info address' always disassembles DWARF expressions."), _("\
25376 When enabled, DWARF expressions are always printed in an assembly-like\n\
25377 syntax. When disabled, expressions will be printed in a more\n\
25378 conversational style, when possible."),
25380 show_dwarf_always_disassemble
,
25381 &set_dwarf_cmdlist
,
25382 &show_dwarf_cmdlist
);
25384 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
25385 Set debugging of the DWARF reader."), _("\
25386 Show debugging of the DWARF reader."), _("\
25387 When enabled (non-zero), debugging messages are printed during DWARF\n\
25388 reading and symtab expansion. A value of 1 (one) provides basic\n\
25389 information. A value greater than 1 provides more verbose information."),
25392 &setdebuglist
, &showdebuglist
);
25394 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
25395 Set debugging of the DWARF DIE reader."), _("\
25396 Show debugging of the DWARF DIE reader."), _("\
25397 When enabled (non-zero), DIEs are dumped after they are read in.\n\
25398 The value is the maximum depth to print."),
25401 &setdebuglist
, &showdebuglist
);
25403 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
25404 Set debugging of the dwarf line reader."), _("\
25405 Show debugging of the dwarf line reader."), _("\
25406 When enabled (non-zero), line number entries are dumped as they are read in.\n\
25407 A value of 1 (one) provides basic information.\n\
25408 A value greater than 1 provides more verbose information."),
25411 &setdebuglist
, &showdebuglist
);
25413 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
25414 Set cross-checking of \"physname\" code against demangler."), _("\
25415 Show cross-checking of \"physname\" code against demangler."), _("\
25416 When enabled, GDB's internal \"physname\" code is checked against\n\
25418 NULL
, show_check_physname
,
25419 &setdebuglist
, &showdebuglist
);
25421 add_setshow_boolean_cmd ("use-deprecated-index-sections",
25422 no_class
, &use_deprecated_index_sections
, _("\
25423 Set whether to use deprecated gdb_index sections."), _("\
25424 Show whether to use deprecated gdb_index sections."), _("\
25425 When enabled, deprecated .gdb_index sections are used anyway.\n\
25426 Normally they are ignored either because of a missing feature or\n\
25427 performance issue.\n\
25428 Warning: This option must be enabled before gdb reads the file."),
25431 &setlist
, &showlist
);
25433 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25434 &dwarf2_locexpr_funcs
);
25435 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25436 &dwarf2_loclist_funcs
);
25438 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25439 &dwarf2_block_frame_base_locexpr_funcs
);
25440 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25441 &dwarf2_block_frame_base_loclist_funcs
);
25444 selftests::register_test ("dw2_expand_symtabs_matching",
25445 selftests::dw2_expand_symtabs_matching::run_test
);