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 /* The name_component table (a sorted vector). See name_component's
151 description above. */
152 std::vector
<name_component
> name_components
;
154 /* How NAME_COMPONENTS is sorted. */
155 enum case_sensitivity name_components_casing
;
157 /* Return the number of names in the symbol table. */
158 virtual size_t symbol_name_count () const = 0;
160 /* Get the name of the symbol at IDX in the symbol table. */
161 virtual const char *symbol_name_at (offset_type idx
) const = 0;
163 /* Return whether the name at IDX in the symbol table should be
165 virtual bool symbol_name_slot_invalid (offset_type idx
) const
170 /* Build the symbol name component sorted vector, if we haven't
172 void build_name_components ();
174 /* Returns the lower (inclusive) and upper (exclusive) bounds of the
175 possible matches for LN_NO_PARAMS in the name component
177 std::pair
<std::vector
<name_component
>::const_iterator
,
178 std::vector
<name_component
>::const_iterator
>
179 find_name_components_bounds (const lookup_name_info
&ln_no_params
) const;
181 /* Prevent deleting/destroying via a base class pointer. */
183 ~mapped_index_base() = default;
186 /* A description of the mapped index. The file format is described in
187 a comment by the code that writes the index. */
188 struct mapped_index final
: public mapped_index_base
190 /* A slot/bucket in the symbol table hash. */
191 struct symbol_table_slot
193 const offset_type name
;
194 const offset_type vec
;
197 /* Index data format version. */
200 /* The total length of the buffer. */
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
;
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 /* Name of the file. */
816 /* File format version. */
822 /* Section info for this file. */
823 struct dwp_sections sections
;
825 /* Table of CUs in the file. */
826 const struct dwp_hash_table
*cus
;
828 /* Table of TUs in the file. */
829 const struct dwp_hash_table
*tus
;
831 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
835 /* Table to map ELF section numbers to their sections.
836 This is only needed for the DWP V1 file format. */
837 unsigned int num_sections
;
838 asection
**elf_sections
;
841 /* This represents a '.dwz' file. */
845 /* A dwz file can only contain a few sections. */
846 struct dwarf2_section_info abbrev
;
847 struct dwarf2_section_info info
;
848 struct dwarf2_section_info str
;
849 struct dwarf2_section_info line
;
850 struct dwarf2_section_info macro
;
851 struct dwarf2_section_info gdb_index
;
852 struct dwarf2_section_info debug_names
;
858 /* Struct used to pass misc. parameters to read_die_and_children, et
859 al. which are used for both .debug_info and .debug_types dies.
860 All parameters here are unchanging for the life of the call. This
861 struct exists to abstract away the constant parameters of die reading. */
863 struct die_reader_specs
865 /* The bfd of die_section. */
868 /* The CU of the DIE we are parsing. */
869 struct dwarf2_cu
*cu
;
871 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
872 struct dwo_file
*dwo_file
;
874 /* The section the die comes from.
875 This is either .debug_info or .debug_types, or the .dwo variants. */
876 struct dwarf2_section_info
*die_section
;
878 /* die_section->buffer. */
879 const gdb_byte
*buffer
;
881 /* The end of the buffer. */
882 const gdb_byte
*buffer_end
;
884 /* The value of the DW_AT_comp_dir attribute. */
885 const char *comp_dir
;
887 /* The abbreviation table to use when reading the DIEs. */
888 struct abbrev_table
*abbrev_table
;
891 /* Type of function passed to init_cutu_and_read_dies, et.al. */
892 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
893 const gdb_byte
*info_ptr
,
894 struct die_info
*comp_unit_die
,
898 /* A 1-based directory index. This is a strong typedef to prevent
899 accidentally using a directory index as a 0-based index into an
901 enum class dir_index
: unsigned int {};
903 /* Likewise, a 1-based file name index. */
904 enum class file_name_index
: unsigned int {};
908 file_entry () = default;
910 file_entry (const char *name_
, dir_index d_index_
,
911 unsigned int mod_time_
, unsigned int length_
)
914 mod_time (mod_time_
),
918 /* Return the include directory at D_INDEX stored in LH. Returns
919 NULL if D_INDEX is out of bounds. */
920 const char *include_dir (const line_header
*lh
) const;
922 /* The file name. Note this is an observing pointer. The memory is
923 owned by debug_line_buffer. */
926 /* The directory index (1-based). */
927 dir_index d_index
{};
929 unsigned int mod_time
{};
931 unsigned int length
{};
933 /* True if referenced by the Line Number Program. */
936 /* The associated symbol table, if any. */
937 struct symtab
*symtab
{};
940 /* The line number information for a compilation unit (found in the
941 .debug_line section) begins with a "statement program header",
942 which contains the following information. */
949 /* Add an entry to the include directory table. */
950 void add_include_dir (const char *include_dir
);
952 /* Add an entry to the file name table. */
953 void add_file_name (const char *name
, dir_index d_index
,
954 unsigned int mod_time
, unsigned int length
);
956 /* Return the include dir at INDEX (1-based). Returns NULL if INDEX
958 const char *include_dir_at (dir_index index
) const
960 /* Convert directory index number (1-based) to vector index
962 size_t vec_index
= to_underlying (index
) - 1;
964 if (vec_index
>= include_dirs
.size ())
966 return include_dirs
[vec_index
];
969 /* Return the file name at INDEX (1-based). Returns NULL if INDEX
971 file_entry
*file_name_at (file_name_index index
)
973 /* Convert file name index number (1-based) to vector index
975 size_t vec_index
= to_underlying (index
) - 1;
977 if (vec_index
>= file_names
.size ())
979 return &file_names
[vec_index
];
982 /* Const version of the above. */
983 const file_entry
*file_name_at (unsigned int index
) const
985 if (index
>= file_names
.size ())
987 return &file_names
[index
];
990 /* Offset of line number information in .debug_line section. */
991 sect_offset sect_off
{};
993 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
994 unsigned offset_in_dwz
: 1; /* Can't initialize bitfields in-class. */
996 unsigned int total_length
{};
997 unsigned short version
{};
998 unsigned int header_length
{};
999 unsigned char minimum_instruction_length
{};
1000 unsigned char maximum_ops_per_instruction
{};
1001 unsigned char default_is_stmt
{};
1003 unsigned char line_range
{};
1004 unsigned char opcode_base
{};
1006 /* standard_opcode_lengths[i] is the number of operands for the
1007 standard opcode whose value is i. This means that
1008 standard_opcode_lengths[0] is unused, and the last meaningful
1009 element is standard_opcode_lengths[opcode_base - 1]. */
1010 std::unique_ptr
<unsigned char[]> standard_opcode_lengths
;
1012 /* The include_directories table. Note these are observing
1013 pointers. The memory is owned by debug_line_buffer. */
1014 std::vector
<const char *> include_dirs
;
1016 /* The file_names table. */
1017 std::vector
<file_entry
> file_names
;
1019 /* The start and end of the statement program following this
1020 header. These point into dwarf2_per_objfile->line_buffer. */
1021 const gdb_byte
*statement_program_start
{}, *statement_program_end
{};
1024 typedef std::unique_ptr
<line_header
> line_header_up
;
1027 file_entry::include_dir (const line_header
*lh
) const
1029 return lh
->include_dir_at (d_index
);
1032 /* When we construct a partial symbol table entry we only
1033 need this much information. */
1034 struct partial_die_info
: public allocate_on_obstack
1036 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
1038 /* Disable assign but still keep copy ctor, which is needed
1039 load_partial_dies. */
1040 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
1042 /* Adjust the partial die before generating a symbol for it. This
1043 function may set the is_external flag or change the DIE's
1045 void fixup (struct dwarf2_cu
*cu
);
1047 /* Read a minimal amount of information into the minimal die
1049 const gdb_byte
*read (const struct die_reader_specs
*reader
,
1050 const struct abbrev_info
&abbrev
,
1051 const gdb_byte
*info_ptr
);
1053 /* Offset of this DIE. */
1054 const sect_offset sect_off
;
1056 /* DWARF-2 tag for this DIE. */
1057 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1059 /* Assorted flags describing the data found in this DIE. */
1060 const unsigned int has_children
: 1;
1062 unsigned int is_external
: 1;
1063 unsigned int is_declaration
: 1;
1064 unsigned int has_type
: 1;
1065 unsigned int has_specification
: 1;
1066 unsigned int has_pc_info
: 1;
1067 unsigned int may_be_inlined
: 1;
1069 /* This DIE has been marked DW_AT_main_subprogram. */
1070 unsigned int main_subprogram
: 1;
1072 /* Flag set if the SCOPE field of this structure has been
1074 unsigned int scope_set
: 1;
1076 /* Flag set if the DIE has a byte_size attribute. */
1077 unsigned int has_byte_size
: 1;
1079 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1080 unsigned int has_const_value
: 1;
1082 /* Flag set if any of the DIE's children are template arguments. */
1083 unsigned int has_template_arguments
: 1;
1085 /* Flag set if fixup has been called on this die. */
1086 unsigned int fixup_called
: 1;
1088 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1089 unsigned int is_dwz
: 1;
1091 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1092 unsigned int spec_is_dwz
: 1;
1094 /* The name of this DIE. Normally the value of DW_AT_name, but
1095 sometimes a default name for unnamed DIEs. */
1096 const char *name
= nullptr;
1098 /* The linkage name, if present. */
1099 const char *linkage_name
= nullptr;
1101 /* The scope to prepend to our children. This is generally
1102 allocated on the comp_unit_obstack, so will disappear
1103 when this compilation unit leaves the cache. */
1104 const char *scope
= nullptr;
1106 /* Some data associated with the partial DIE. The tag determines
1107 which field is live. */
1110 /* The location description associated with this DIE, if any. */
1111 struct dwarf_block
*locdesc
;
1112 /* The offset of an import, for DW_TAG_imported_unit. */
1113 sect_offset sect_off
;
1116 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1117 CORE_ADDR lowpc
= 0;
1118 CORE_ADDR highpc
= 0;
1120 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1121 DW_AT_sibling, if any. */
1122 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1123 could return DW_AT_sibling values to its caller load_partial_dies. */
1124 const gdb_byte
*sibling
= nullptr;
1126 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1127 DW_AT_specification (or DW_AT_abstract_origin or
1128 DW_AT_extension). */
1129 sect_offset spec_offset
{};
1131 /* Pointers to this DIE's parent, first child, and next sibling,
1133 struct partial_die_info
*die_parent
= nullptr;
1134 struct partial_die_info
*die_child
= nullptr;
1135 struct partial_die_info
*die_sibling
= nullptr;
1137 friend struct partial_die_info
*
1138 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1141 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1142 partial_die_info (sect_offset sect_off
)
1143 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1147 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1149 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1154 has_specification
= 0;
1157 main_subprogram
= 0;
1160 has_const_value
= 0;
1161 has_template_arguments
= 0;
1168 /* This data structure holds the information of an abbrev. */
1171 unsigned int number
; /* number identifying abbrev */
1172 enum dwarf_tag tag
; /* dwarf tag */
1173 unsigned short has_children
; /* boolean */
1174 unsigned short num_attrs
; /* number of attributes */
1175 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1176 struct abbrev_info
*next
; /* next in chain */
1181 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1182 ENUM_BITFIELD(dwarf_form
) form
: 16;
1184 /* It is valid only if FORM is DW_FORM_implicit_const. */
1185 LONGEST implicit_const
;
1188 /* Size of abbrev_table.abbrev_hash_table. */
1189 #define ABBREV_HASH_SIZE 121
1191 /* Top level data structure to contain an abbreviation table. */
1195 explicit abbrev_table (sect_offset off
)
1199 XOBNEWVEC (&abbrev_obstack
, struct abbrev_info
*, ABBREV_HASH_SIZE
);
1200 memset (m_abbrevs
, 0, ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
1203 DISABLE_COPY_AND_ASSIGN (abbrev_table
);
1205 /* Allocate space for a struct abbrev_info object in
1207 struct abbrev_info
*alloc_abbrev ();
1209 /* Add an abbreviation to the table. */
1210 void add_abbrev (unsigned int abbrev_number
, struct abbrev_info
*abbrev
);
1212 /* Look up an abbrev in the table.
1213 Returns NULL if the abbrev is not found. */
1215 struct abbrev_info
*lookup_abbrev (unsigned int abbrev_number
);
1218 /* Where the abbrev table came from.
1219 This is used as a sanity check when the table is used. */
1220 const sect_offset sect_off
;
1222 /* Storage for the abbrev table. */
1223 auto_obstack abbrev_obstack
;
1227 /* Hash table of abbrevs.
1228 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1229 It could be statically allocated, but the previous code didn't so we
1231 struct abbrev_info
**m_abbrevs
;
1234 typedef std::unique_ptr
<struct abbrev_table
> abbrev_table_up
;
1236 /* Attributes have a name and a value. */
1239 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1240 ENUM_BITFIELD(dwarf_form
) form
: 15;
1242 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1243 field should be in u.str (existing only for DW_STRING) but it is kept
1244 here for better struct attribute alignment. */
1245 unsigned int string_is_canonical
: 1;
1250 struct dwarf_block
*blk
;
1259 /* This data structure holds a complete die structure. */
1262 /* DWARF-2 tag for this DIE. */
1263 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1265 /* Number of attributes */
1266 unsigned char num_attrs
;
1268 /* True if we're presently building the full type name for the
1269 type derived from this DIE. */
1270 unsigned char building_fullname
: 1;
1272 /* True if this die is in process. PR 16581. */
1273 unsigned char in_process
: 1;
1276 unsigned int abbrev
;
1278 /* Offset in .debug_info or .debug_types section. */
1279 sect_offset sect_off
;
1281 /* The dies in a compilation unit form an n-ary tree. PARENT
1282 points to this die's parent; CHILD points to the first child of
1283 this node; and all the children of a given node are chained
1284 together via their SIBLING fields. */
1285 struct die_info
*child
; /* Its first child, if any. */
1286 struct die_info
*sibling
; /* Its next sibling, if any. */
1287 struct die_info
*parent
; /* Its parent, if any. */
1289 /* An array of attributes, with NUM_ATTRS elements. There may be
1290 zero, but it's not common and zero-sized arrays are not
1291 sufficiently portable C. */
1292 struct attribute attrs
[1];
1295 /* Get at parts of an attribute structure. */
1297 #define DW_STRING(attr) ((attr)->u.str)
1298 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1299 #define DW_UNSND(attr) ((attr)->u.unsnd)
1300 #define DW_BLOCK(attr) ((attr)->u.blk)
1301 #define DW_SND(attr) ((attr)->u.snd)
1302 #define DW_ADDR(attr) ((attr)->u.addr)
1303 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1305 /* Blocks are a bunch of untyped bytes. */
1310 /* Valid only if SIZE is not zero. */
1311 const gdb_byte
*data
;
1314 #ifndef ATTR_ALLOC_CHUNK
1315 #define ATTR_ALLOC_CHUNK 4
1318 /* Allocate fields for structs, unions and enums in this size. */
1319 #ifndef DW_FIELD_ALLOC_CHUNK
1320 #define DW_FIELD_ALLOC_CHUNK 4
1323 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1324 but this would require a corresponding change in unpack_field_as_long
1326 static int bits_per_byte
= 8;
1328 /* When reading a variant or variant part, we track a bit more
1329 information about the field, and store it in an object of this
1332 struct variant_field
1334 /* If we see a DW_TAG_variant, then this will be the discriminant
1336 ULONGEST discriminant_value
;
1337 /* If we see a DW_TAG_variant, then this will be set if this is the
1339 bool default_branch
;
1340 /* While reading a DW_TAG_variant_part, this will be set if this
1341 field is the discriminant. */
1342 bool is_discriminant
;
1347 int accessibility
= 0;
1349 /* Extra information to describe a variant or variant part. */
1350 struct variant_field variant
{};
1351 struct field field
{};
1356 const char *name
= nullptr;
1357 std::vector
<struct fn_field
> fnfields
;
1360 /* The routines that read and process dies for a C struct or C++ class
1361 pass lists of data member fields and lists of member function fields
1362 in an instance of a field_info structure, as defined below. */
1365 /* List of data member and baseclasses fields. */
1366 std::vector
<struct nextfield
> fields
;
1367 std::vector
<struct nextfield
> baseclasses
;
1369 /* Number of fields (including baseclasses). */
1372 /* Set if the accesibility of one of the fields is not public. */
1373 int non_public_fields
= 0;
1375 /* Member function fieldlist array, contains name of possibly overloaded
1376 member function, number of overloaded member functions and a pointer
1377 to the head of the member function field chain. */
1378 std::vector
<struct fnfieldlist
> fnfieldlists
;
1380 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1381 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1382 std::vector
<struct decl_field
> typedef_field_list
;
1384 /* Nested types defined by this class and the number of elements in this
1386 std::vector
<struct decl_field
> nested_types_list
;
1389 /* One item on the queue of compilation units to read in full symbols
1391 struct dwarf2_queue_item
1393 struct dwarf2_per_cu_data
*per_cu
;
1394 enum language pretend_language
;
1395 struct dwarf2_queue_item
*next
;
1398 /* The current queue. */
1399 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1401 /* Loaded secondary compilation units are kept in memory until they
1402 have not been referenced for the processing of this many
1403 compilation units. Set this to zero to disable caching. Cache
1404 sizes of up to at least twenty will improve startup time for
1405 typical inter-CU-reference binaries, at an obvious memory cost. */
1406 static int dwarf_max_cache_age
= 5;
1408 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1409 struct cmd_list_element
*c
, const char *value
)
1411 fprintf_filtered (file
, _("The upper bound on the age of cached "
1412 "DWARF compilation units is %s.\n"),
1416 /* local function prototypes */
1418 static const char *get_section_name (const struct dwarf2_section_info
*);
1420 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1422 static void dwarf2_find_base_address (struct die_info
*die
,
1423 struct dwarf2_cu
*cu
);
1425 static struct partial_symtab
*create_partial_symtab
1426 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1428 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1429 const gdb_byte
*info_ptr
,
1430 struct die_info
*type_unit_die
,
1431 int has_children
, void *data
);
1433 static void dwarf2_build_psymtabs_hard
1434 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1436 static void scan_partial_symbols (struct partial_die_info
*,
1437 CORE_ADDR
*, CORE_ADDR
*,
1438 int, struct dwarf2_cu
*);
1440 static void add_partial_symbol (struct partial_die_info
*,
1441 struct dwarf2_cu
*);
1443 static void add_partial_namespace (struct partial_die_info
*pdi
,
1444 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1445 int set_addrmap
, struct dwarf2_cu
*cu
);
1447 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1448 CORE_ADDR
*highpc
, int set_addrmap
,
1449 struct dwarf2_cu
*cu
);
1451 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1452 struct dwarf2_cu
*cu
);
1454 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1455 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1456 int need_pc
, struct dwarf2_cu
*cu
);
1458 static void dwarf2_read_symtab (struct partial_symtab
*,
1461 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1463 static abbrev_table_up abbrev_table_read_table
1464 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, struct dwarf2_section_info
*,
1467 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1469 static struct partial_die_info
*load_partial_dies
1470 (const struct die_reader_specs
*, const gdb_byte
*, int);
1472 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1473 struct dwarf2_cu
*);
1475 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1476 struct attribute
*, struct attr_abbrev
*,
1479 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1481 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1483 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1485 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1487 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1489 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1492 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1494 static LONGEST read_checked_initial_length_and_offset
1495 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1496 unsigned int *, unsigned int *);
1498 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1499 const struct comp_unit_head
*,
1502 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1504 static sect_offset read_abbrev_offset
1505 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1506 struct dwarf2_section_info
*, sect_offset
);
1508 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1510 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1512 static const char *read_indirect_string
1513 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1514 const struct comp_unit_head
*, unsigned int *);
1516 static const char *read_indirect_line_string
1517 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1518 const struct comp_unit_head
*, unsigned int *);
1520 static const char *read_indirect_string_at_offset
1521 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
1522 LONGEST str_offset
);
1524 static const char *read_indirect_string_from_dwz
1525 (struct objfile
*objfile
, struct dwz_file
*, LONGEST
);
1527 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1529 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1533 static const char *read_str_index (const struct die_reader_specs
*reader
,
1534 ULONGEST str_index
);
1536 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1538 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1539 struct dwarf2_cu
*);
1541 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1544 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1545 struct dwarf2_cu
*cu
);
1547 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1548 struct dwarf2_cu
*cu
);
1550 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1552 static struct die_info
*die_specification (struct die_info
*die
,
1553 struct dwarf2_cu
**);
1555 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1556 struct dwarf2_cu
*cu
);
1558 static void dwarf_decode_lines (struct line_header
*, const char *,
1559 struct dwarf2_cu
*, struct partial_symtab
*,
1560 CORE_ADDR
, int decode_mapping
);
1562 static void dwarf2_start_subfile (const char *, const char *);
1564 static struct compunit_symtab
*dwarf2_start_symtab (struct dwarf2_cu
*,
1565 const char *, const char *,
1568 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1569 struct dwarf2_cu
*, struct symbol
* = NULL
);
1571 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1572 struct dwarf2_cu
*);
1574 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1577 struct obstack
*obstack
,
1578 struct dwarf2_cu
*cu
, LONGEST
*value
,
1579 const gdb_byte
**bytes
,
1580 struct dwarf2_locexpr_baton
**baton
);
1582 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1584 static int need_gnat_info (struct dwarf2_cu
*);
1586 static struct type
*die_descriptive_type (struct die_info
*,
1587 struct dwarf2_cu
*);
1589 static void set_descriptive_type (struct type
*, struct die_info
*,
1590 struct dwarf2_cu
*);
1592 static struct type
*die_containing_type (struct die_info
*,
1593 struct dwarf2_cu
*);
1595 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1596 struct dwarf2_cu
*);
1598 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1600 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1602 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1604 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1605 const char *suffix
, int physname
,
1606 struct dwarf2_cu
*cu
);
1608 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1610 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1612 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1614 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1616 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1618 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1620 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1621 struct dwarf2_cu
*, struct partial_symtab
*);
1623 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1624 values. Keep the items ordered with increasing constraints compliance. */
1627 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1628 PC_BOUNDS_NOT_PRESENT
,
1630 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1631 were present but they do not form a valid range of PC addresses. */
1634 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1637 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1641 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1642 CORE_ADDR
*, CORE_ADDR
*,
1644 struct partial_symtab
*);
1646 static void get_scope_pc_bounds (struct die_info
*,
1647 CORE_ADDR
*, CORE_ADDR
*,
1648 struct dwarf2_cu
*);
1650 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1651 CORE_ADDR
, struct dwarf2_cu
*);
1653 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1654 struct dwarf2_cu
*);
1656 static void dwarf2_attach_fields_to_type (struct field_info
*,
1657 struct type
*, struct dwarf2_cu
*);
1659 static void dwarf2_add_member_fn (struct field_info
*,
1660 struct die_info
*, struct type
*,
1661 struct dwarf2_cu
*);
1663 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1665 struct dwarf2_cu
*);
1667 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1669 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1671 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1673 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1675 static struct using_direct
**using_directives (enum language
);
1677 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1679 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1681 static struct type
*read_module_type (struct die_info
*die
,
1682 struct dwarf2_cu
*cu
);
1684 static const char *namespace_name (struct die_info
*die
,
1685 int *is_anonymous
, struct dwarf2_cu
*);
1687 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1689 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1691 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1692 struct dwarf2_cu
*);
1694 static struct die_info
*read_die_and_siblings_1
1695 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1698 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1699 const gdb_byte
*info_ptr
,
1700 const gdb_byte
**new_info_ptr
,
1701 struct die_info
*parent
);
1703 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1704 struct die_info
**, const gdb_byte
*,
1707 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1708 struct die_info
**, const gdb_byte
*,
1711 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1713 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1716 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1718 static const char *dwarf2_full_name (const char *name
,
1719 struct die_info
*die
,
1720 struct dwarf2_cu
*cu
);
1722 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1723 struct dwarf2_cu
*cu
);
1725 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1726 struct dwarf2_cu
**);
1728 static const char *dwarf_tag_name (unsigned int);
1730 static const char *dwarf_attr_name (unsigned int);
1732 static const char *dwarf_form_name (unsigned int);
1734 static const char *dwarf_bool_name (unsigned int);
1736 static const char *dwarf_type_encoding_name (unsigned int);
1738 static struct die_info
*sibling_die (struct die_info
*);
1740 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1742 static void dump_die_for_error (struct die_info
*);
1744 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1747 /*static*/ void dump_die (struct die_info
*, int max_level
);
1749 static void store_in_ref_table (struct die_info
*,
1750 struct dwarf2_cu
*);
1752 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1754 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1756 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1757 const struct attribute
*,
1758 struct dwarf2_cu
**);
1760 static struct die_info
*follow_die_ref (struct die_info
*,
1761 const struct attribute
*,
1762 struct dwarf2_cu
**);
1764 static struct die_info
*follow_die_sig (struct die_info
*,
1765 const struct attribute
*,
1766 struct dwarf2_cu
**);
1768 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1769 struct dwarf2_cu
*);
1771 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1772 const struct attribute
*,
1773 struct dwarf2_cu
*);
1775 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1777 static void read_signatured_type (struct signatured_type
*);
1779 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1780 struct die_info
*die
, struct dwarf2_cu
*cu
,
1781 struct dynamic_prop
*prop
);
1783 /* memory allocation interface */
1785 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1787 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1789 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1791 static int attr_form_is_block (const struct attribute
*);
1793 static int attr_form_is_section_offset (const struct attribute
*);
1795 static int attr_form_is_constant (const struct attribute
*);
1797 static int attr_form_is_ref (const struct attribute
*);
1799 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1800 struct dwarf2_loclist_baton
*baton
,
1801 const struct attribute
*attr
);
1803 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1805 struct dwarf2_cu
*cu
,
1808 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1809 const gdb_byte
*info_ptr
,
1810 struct abbrev_info
*abbrev
);
1812 static hashval_t
partial_die_hash (const void *item
);
1814 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1816 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1817 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1818 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1820 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1821 struct die_info
*comp_unit_die
,
1822 enum language pretend_language
);
1824 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1826 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1828 static struct type
*set_die_type (struct die_info
*, struct type
*,
1829 struct dwarf2_cu
*);
1831 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1833 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1835 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1838 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1841 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1844 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1845 struct dwarf2_per_cu_data
*);
1847 static void dwarf2_mark (struct dwarf2_cu
*);
1849 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1851 static struct type
*get_die_type_at_offset (sect_offset
,
1852 struct dwarf2_per_cu_data
*);
1854 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1856 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1857 enum language pretend_language
);
1859 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1861 /* Class, the destructor of which frees all allocated queue entries. This
1862 will only have work to do if an error was thrown while processing the
1863 dwarf. If no error was thrown then the queue entries should have all
1864 been processed, and freed, as we went along. */
1866 class dwarf2_queue_guard
1869 dwarf2_queue_guard () = default;
1871 /* Free any entries remaining on the queue. There should only be
1872 entries left if we hit an error while processing the dwarf. */
1873 ~dwarf2_queue_guard ()
1875 struct dwarf2_queue_item
*item
, *last
;
1877 item
= dwarf2_queue
;
1880 /* Anything still marked queued is likely to be in an
1881 inconsistent state, so discard it. */
1882 if (item
->per_cu
->queued
)
1884 if (item
->per_cu
->cu
!= NULL
)
1885 free_one_cached_comp_unit (item
->per_cu
);
1886 item
->per_cu
->queued
= 0;
1894 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
1898 /* The return type of find_file_and_directory. Note, the enclosed
1899 string pointers are only valid while this object is valid. */
1901 struct file_and_directory
1903 /* The filename. This is never NULL. */
1906 /* The compilation directory. NULL if not known. If we needed to
1907 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1908 points directly to the DW_AT_comp_dir string attribute owned by
1909 the obstack that owns the DIE. */
1910 const char *comp_dir
;
1912 /* If we needed to build a new string for comp_dir, this is what
1913 owns the storage. */
1914 std::string comp_dir_storage
;
1917 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1918 struct dwarf2_cu
*cu
);
1920 static char *file_full_name (int file
, struct line_header
*lh
,
1921 const char *comp_dir
);
1923 /* Expected enum dwarf_unit_type for read_comp_unit_head. */
1924 enum class rcuh_kind
{ COMPILE
, TYPE
};
1926 static const gdb_byte
*read_and_check_comp_unit_head
1927 (struct dwarf2_per_objfile
* dwarf2_per_objfile
,
1928 struct comp_unit_head
*header
,
1929 struct dwarf2_section_info
*section
,
1930 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1931 rcuh_kind section_kind
);
1933 static void init_cutu_and_read_dies
1934 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1935 int use_existing_cu
, int keep
,
1936 die_reader_func_ftype
*die_reader_func
, void *data
);
1938 static void init_cutu_and_read_dies_simple
1939 (struct dwarf2_per_cu_data
*this_cu
,
1940 die_reader_func_ftype
*die_reader_func
, void *data
);
1942 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1944 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1946 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1947 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1948 struct dwp_file
*dwp_file
, const char *comp_dir
,
1949 ULONGEST signature
, int is_debug_types
);
1951 static struct dwp_file
*get_dwp_file
1952 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1954 static struct dwo_unit
*lookup_dwo_comp_unit
1955 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1957 static struct dwo_unit
*lookup_dwo_type_unit
1958 (struct signatured_type
*, const char *, const char *);
1960 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1962 static void free_dwo_file (struct dwo_file
*);
1964 /* A unique_ptr helper to free a dwo_file. */
1966 struct dwo_file_deleter
1968 void operator() (struct dwo_file
*df
) const
1974 /* A unique pointer to a dwo_file. */
1976 typedef std::unique_ptr
<struct dwo_file
, dwo_file_deleter
> dwo_file_up
;
1978 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1980 static void check_producer (struct dwarf2_cu
*cu
);
1982 static void free_line_header_voidp (void *arg
);
1984 /* Various complaints about symbol reading that don't abort the process. */
1987 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1989 complaint (&symfile_complaints
,
1990 _("statement list doesn't fit in .debug_line section"));
1994 dwarf2_debug_line_missing_file_complaint (void)
1996 complaint (&symfile_complaints
,
1997 _(".debug_line section has line data without a file"));
2001 dwarf2_debug_line_missing_end_sequence_complaint (void)
2003 complaint (&symfile_complaints
,
2004 _(".debug_line section has line "
2005 "program sequence without an end"));
2009 dwarf2_complex_location_expr_complaint (void)
2011 complaint (&symfile_complaints
, _("location expression too complex"));
2015 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
2018 complaint (&symfile_complaints
,
2019 _("const value length mismatch for '%s', got %d, expected %d"),
2024 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
2026 complaint (&symfile_complaints
,
2027 _("debug info runs off end of %s section"
2029 get_section_name (section
),
2030 get_section_file_name (section
));
2034 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
2036 complaint (&symfile_complaints
,
2037 _("macro debug info contains a "
2038 "malformed macro definition:\n`%s'"),
2043 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
2045 complaint (&symfile_complaints
,
2046 _("invalid attribute class or form for '%s' in '%s'"),
2050 /* Hash function for line_header_hash. */
2053 line_header_hash (const struct line_header
*ofs
)
2055 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
2058 /* Hash function for htab_create_alloc_ex for line_header_hash. */
2061 line_header_hash_voidp (const void *item
)
2063 const struct line_header
*ofs
= (const struct line_header
*) item
;
2065 return line_header_hash (ofs
);
2068 /* Equality function for line_header_hash. */
2071 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
2073 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
2074 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
2076 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
2077 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
2082 /* Read the given attribute value as an address, taking the attribute's
2083 form into account. */
2086 attr_value_as_address (struct attribute
*attr
)
2090 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
2092 /* Aside from a few clearly defined exceptions, attributes that
2093 contain an address must always be in DW_FORM_addr form.
2094 Unfortunately, some compilers happen to be violating this
2095 requirement by encoding addresses using other forms, such
2096 as DW_FORM_data4 for example. For those broken compilers,
2097 we try to do our best, without any guarantee of success,
2098 to interpret the address correctly. It would also be nice
2099 to generate a complaint, but that would require us to maintain
2100 a list of legitimate cases where a non-address form is allowed,
2101 as well as update callers to pass in at least the CU's DWARF
2102 version. This is more overhead than what we're willing to
2103 expand for a pretty rare case. */
2104 addr
= DW_UNSND (attr
);
2107 addr
= DW_ADDR (attr
);
2112 /* See declaration. */
2114 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
2115 const dwarf2_debug_sections
*names
)
2116 : objfile (objfile_
)
2119 names
= &dwarf2_elf_names
;
2121 bfd
*obfd
= objfile
->obfd
;
2123 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2124 locate_sections (obfd
, sec
, *names
);
2127 static void free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
);
2129 dwarf2_per_objfile::~dwarf2_per_objfile ()
2131 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
2132 free_cached_comp_units ();
2134 if (quick_file_names_table
)
2135 htab_delete (quick_file_names_table
);
2137 if (line_header_hash
)
2138 htab_delete (line_header_hash
);
2140 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
2141 VEC_free (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
);
2143 for (signatured_type
*sig_type
: all_type_units
)
2144 VEC_free (dwarf2_per_cu_ptr
, sig_type
->per_cu
.imported_symtabs
);
2146 VEC_free (dwarf2_section_info_def
, types
);
2148 if (dwo_files
!= NULL
)
2149 free_dwo_files (dwo_files
, objfile
);
2150 if (dwp_file
!= NULL
)
2151 gdb_bfd_unref (dwp_file
->dbfd
);
2153 if (dwz_file
!= NULL
&& dwz_file
->dwz_bfd
)
2154 gdb_bfd_unref (dwz_file
->dwz_bfd
);
2156 if (index_table
!= NULL
)
2157 index_table
->~mapped_index ();
2159 /* Everything else should be on the objfile obstack. */
2162 /* See declaration. */
2165 dwarf2_per_objfile::free_cached_comp_units ()
2167 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
2168 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
2169 while (per_cu
!= NULL
)
2171 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
2174 *last_chain
= next_cu
;
2179 /* A helper class that calls free_cached_comp_units on
2182 class free_cached_comp_units
2186 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
2187 : m_per_objfile (per_objfile
)
2191 ~free_cached_comp_units ()
2193 m_per_objfile
->free_cached_comp_units ();
2196 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
2200 dwarf2_per_objfile
*m_per_objfile
;
2203 /* Try to locate the sections we need for DWARF 2 debugging
2204 information and return true if we have enough to do something.
2205 NAMES points to the dwarf2 section names, or is NULL if the standard
2206 ELF names are used. */
2209 dwarf2_has_info (struct objfile
*objfile
,
2210 const struct dwarf2_debug_sections
*names
)
2212 if (objfile
->flags
& OBJF_READNEVER
)
2215 struct dwarf2_per_objfile
*dwarf2_per_objfile
2216 = get_dwarf2_per_objfile (objfile
);
2218 if (dwarf2_per_objfile
== NULL
)
2220 /* Initialize per-objfile state. */
2222 = new (&objfile
->objfile_obstack
) struct dwarf2_per_objfile (objfile
,
2224 set_dwarf2_per_objfile (objfile
, dwarf2_per_objfile
);
2226 return (!dwarf2_per_objfile
->info
.is_virtual
2227 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2228 && !dwarf2_per_objfile
->abbrev
.is_virtual
2229 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2232 /* Return the containing section of virtual section SECTION. */
2234 static struct dwarf2_section_info
*
2235 get_containing_section (const struct dwarf2_section_info
*section
)
2237 gdb_assert (section
->is_virtual
);
2238 return section
->s
.containing_section
;
2241 /* Return the bfd owner of SECTION. */
2244 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2246 if (section
->is_virtual
)
2248 section
= get_containing_section (section
);
2249 gdb_assert (!section
->is_virtual
);
2251 return section
->s
.section
->owner
;
2254 /* Return the bfd section of SECTION.
2255 Returns NULL if the section is not present. */
2258 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2260 if (section
->is_virtual
)
2262 section
= get_containing_section (section
);
2263 gdb_assert (!section
->is_virtual
);
2265 return section
->s
.section
;
2268 /* Return the name of SECTION. */
2271 get_section_name (const struct dwarf2_section_info
*section
)
2273 asection
*sectp
= get_section_bfd_section (section
);
2275 gdb_assert (sectp
!= NULL
);
2276 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2279 /* Return the name of the file SECTION is in. */
2282 get_section_file_name (const struct dwarf2_section_info
*section
)
2284 bfd
*abfd
= get_section_bfd_owner (section
);
2286 return bfd_get_filename (abfd
);
2289 /* Return the id of SECTION.
2290 Returns 0 if SECTION doesn't exist. */
2293 get_section_id (const struct dwarf2_section_info
*section
)
2295 asection
*sectp
= get_section_bfd_section (section
);
2302 /* Return the flags of SECTION.
2303 SECTION (or containing section if this is a virtual section) must exist. */
2306 get_section_flags (const struct dwarf2_section_info
*section
)
2308 asection
*sectp
= get_section_bfd_section (section
);
2310 gdb_assert (sectp
!= NULL
);
2311 return bfd_get_section_flags (sectp
->owner
, sectp
);
2314 /* When loading sections, we look either for uncompressed section or for
2315 compressed section names. */
2318 section_is_p (const char *section_name
,
2319 const struct dwarf2_section_names
*names
)
2321 if (names
->normal
!= NULL
2322 && strcmp (section_name
, names
->normal
) == 0)
2324 if (names
->compressed
!= NULL
2325 && strcmp (section_name
, names
->compressed
) == 0)
2330 /* See declaration. */
2333 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
2334 const dwarf2_debug_sections
&names
)
2336 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2338 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2341 else if (section_is_p (sectp
->name
, &names
.info
))
2343 this->info
.s
.section
= sectp
;
2344 this->info
.size
= bfd_get_section_size (sectp
);
2346 else if (section_is_p (sectp
->name
, &names
.abbrev
))
2348 this->abbrev
.s
.section
= sectp
;
2349 this->abbrev
.size
= bfd_get_section_size (sectp
);
2351 else if (section_is_p (sectp
->name
, &names
.line
))
2353 this->line
.s
.section
= sectp
;
2354 this->line
.size
= bfd_get_section_size (sectp
);
2356 else if (section_is_p (sectp
->name
, &names
.loc
))
2358 this->loc
.s
.section
= sectp
;
2359 this->loc
.size
= bfd_get_section_size (sectp
);
2361 else if (section_is_p (sectp
->name
, &names
.loclists
))
2363 this->loclists
.s
.section
= sectp
;
2364 this->loclists
.size
= bfd_get_section_size (sectp
);
2366 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2368 this->macinfo
.s
.section
= sectp
;
2369 this->macinfo
.size
= bfd_get_section_size (sectp
);
2371 else if (section_is_p (sectp
->name
, &names
.macro
))
2373 this->macro
.s
.section
= sectp
;
2374 this->macro
.size
= bfd_get_section_size (sectp
);
2376 else if (section_is_p (sectp
->name
, &names
.str
))
2378 this->str
.s
.section
= sectp
;
2379 this->str
.size
= bfd_get_section_size (sectp
);
2381 else if (section_is_p (sectp
->name
, &names
.line_str
))
2383 this->line_str
.s
.section
= sectp
;
2384 this->line_str
.size
= bfd_get_section_size (sectp
);
2386 else if (section_is_p (sectp
->name
, &names
.addr
))
2388 this->addr
.s
.section
= sectp
;
2389 this->addr
.size
= bfd_get_section_size (sectp
);
2391 else if (section_is_p (sectp
->name
, &names
.frame
))
2393 this->frame
.s
.section
= sectp
;
2394 this->frame
.size
= bfd_get_section_size (sectp
);
2396 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2398 this->eh_frame
.s
.section
= sectp
;
2399 this->eh_frame
.size
= bfd_get_section_size (sectp
);
2401 else if (section_is_p (sectp
->name
, &names
.ranges
))
2403 this->ranges
.s
.section
= sectp
;
2404 this->ranges
.size
= bfd_get_section_size (sectp
);
2406 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2408 this->rnglists
.s
.section
= sectp
;
2409 this->rnglists
.size
= bfd_get_section_size (sectp
);
2411 else if (section_is_p (sectp
->name
, &names
.types
))
2413 struct dwarf2_section_info type_section
;
2415 memset (&type_section
, 0, sizeof (type_section
));
2416 type_section
.s
.section
= sectp
;
2417 type_section
.size
= bfd_get_section_size (sectp
);
2419 VEC_safe_push (dwarf2_section_info_def
, this->types
,
2422 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2424 this->gdb_index
.s
.section
= sectp
;
2425 this->gdb_index
.size
= bfd_get_section_size (sectp
);
2427 else if (section_is_p (sectp
->name
, &names
.debug_names
))
2429 this->debug_names
.s
.section
= sectp
;
2430 this->debug_names
.size
= bfd_get_section_size (sectp
);
2432 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
2434 this->debug_aranges
.s
.section
= sectp
;
2435 this->debug_aranges
.size
= bfd_get_section_size (sectp
);
2438 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2439 && bfd_section_vma (abfd
, sectp
) == 0)
2440 this->has_section_at_zero
= true;
2443 /* A helper function that decides whether a section is empty,
2447 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2449 if (section
->is_virtual
)
2450 return section
->size
== 0;
2451 return section
->s
.section
== NULL
|| section
->size
== 0;
2454 /* See dwarf2read.h. */
2457 dwarf2_read_section (struct objfile
*objfile
, dwarf2_section_info
*info
)
2461 gdb_byte
*buf
, *retbuf
;
2465 info
->buffer
= NULL
;
2468 if (dwarf2_section_empty_p (info
))
2471 sectp
= get_section_bfd_section (info
);
2473 /* If this is a virtual section we need to read in the real one first. */
2474 if (info
->is_virtual
)
2476 struct dwarf2_section_info
*containing_section
=
2477 get_containing_section (info
);
2479 gdb_assert (sectp
!= NULL
);
2480 if ((sectp
->flags
& SEC_RELOC
) != 0)
2482 error (_("Dwarf Error: DWP format V2 with relocations is not"
2483 " supported in section %s [in module %s]"),
2484 get_section_name (info
), get_section_file_name (info
));
2486 dwarf2_read_section (objfile
, containing_section
);
2487 /* Other code should have already caught virtual sections that don't
2489 gdb_assert (info
->virtual_offset
+ info
->size
2490 <= containing_section
->size
);
2491 /* If the real section is empty or there was a problem reading the
2492 section we shouldn't get here. */
2493 gdb_assert (containing_section
->buffer
!= NULL
);
2494 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2498 /* If the section has relocations, we must read it ourselves.
2499 Otherwise we attach it to the BFD. */
2500 if ((sectp
->flags
& SEC_RELOC
) == 0)
2502 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2506 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2509 /* When debugging .o files, we may need to apply relocations; see
2510 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2511 We never compress sections in .o files, so we only need to
2512 try this when the section is not compressed. */
2513 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2516 info
->buffer
= retbuf
;
2520 abfd
= get_section_bfd_owner (info
);
2521 gdb_assert (abfd
!= NULL
);
2523 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2524 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2526 error (_("Dwarf Error: Can't read DWARF data"
2527 " in section %s [in module %s]"),
2528 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2532 /* A helper function that returns the size of a section in a safe way.
2533 If you are positive that the section has been read before using the
2534 size, then it is safe to refer to the dwarf2_section_info object's
2535 "size" field directly. In other cases, you must call this
2536 function, because for compressed sections the size field is not set
2537 correctly until the section has been read. */
2539 static bfd_size_type
2540 dwarf2_section_size (struct objfile
*objfile
,
2541 struct dwarf2_section_info
*info
)
2544 dwarf2_read_section (objfile
, info
);
2548 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2552 dwarf2_get_section_info (struct objfile
*objfile
,
2553 enum dwarf2_section_enum sect
,
2554 asection
**sectp
, const gdb_byte
**bufp
,
2555 bfd_size_type
*sizep
)
2557 struct dwarf2_per_objfile
*data
2558 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
2559 dwarf2_objfile_data_key
);
2560 struct dwarf2_section_info
*info
;
2562 /* We may see an objfile without any DWARF, in which case we just
2573 case DWARF2_DEBUG_FRAME
:
2574 info
= &data
->frame
;
2576 case DWARF2_EH_FRAME
:
2577 info
= &data
->eh_frame
;
2580 gdb_assert_not_reached ("unexpected section");
2583 dwarf2_read_section (objfile
, info
);
2585 *sectp
= get_section_bfd_section (info
);
2586 *bufp
= info
->buffer
;
2587 *sizep
= info
->size
;
2590 /* A helper function to find the sections for a .dwz file. */
2593 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2595 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2597 /* Note that we only support the standard ELF names, because .dwz
2598 is ELF-only (at the time of writing). */
2599 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2601 dwz_file
->abbrev
.s
.section
= sectp
;
2602 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2604 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2606 dwz_file
->info
.s
.section
= sectp
;
2607 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2609 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2611 dwz_file
->str
.s
.section
= sectp
;
2612 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2614 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2616 dwz_file
->line
.s
.section
= sectp
;
2617 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2619 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2621 dwz_file
->macro
.s
.section
= sectp
;
2622 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2624 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2626 dwz_file
->gdb_index
.s
.section
= sectp
;
2627 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2629 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2631 dwz_file
->debug_names
.s
.section
= sectp
;
2632 dwz_file
->debug_names
.size
= bfd_get_section_size (sectp
);
2636 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2637 there is no .gnu_debugaltlink section in the file. Error if there
2638 is such a section but the file cannot be found. */
2640 static struct dwz_file
*
2641 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2643 const char *filename
;
2644 struct dwz_file
*result
;
2645 bfd_size_type buildid_len_arg
;
2649 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2650 return dwarf2_per_objfile
->dwz_file
;
2652 bfd_set_error (bfd_error_no_error
);
2653 gdb::unique_xmalloc_ptr
<char> data
2654 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2655 &buildid_len_arg
, &buildid
));
2658 if (bfd_get_error () == bfd_error_no_error
)
2660 error (_("could not read '.gnu_debugaltlink' section: %s"),
2661 bfd_errmsg (bfd_get_error ()));
2664 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2666 buildid_len
= (size_t) buildid_len_arg
;
2668 filename
= data
.get ();
2670 std::string abs_storage
;
2671 if (!IS_ABSOLUTE_PATH (filename
))
2673 gdb::unique_xmalloc_ptr
<char> abs
2674 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2676 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2677 filename
= abs_storage
.c_str ();
2680 /* First try the file name given in the section. If that doesn't
2681 work, try to use the build-id instead. */
2682 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2683 if (dwz_bfd
!= NULL
)
2685 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2689 if (dwz_bfd
== NULL
)
2690 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2692 if (dwz_bfd
== NULL
)
2693 error (_("could not find '.gnu_debugaltlink' file for %s"),
2694 objfile_name (dwarf2_per_objfile
->objfile
));
2696 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2698 result
->dwz_bfd
= dwz_bfd
.release ();
2700 bfd_map_over_sections (result
->dwz_bfd
, locate_dwz_sections
, result
);
2702 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, result
->dwz_bfd
);
2703 dwarf2_per_objfile
->dwz_file
= result
;
2707 /* DWARF quick_symbols_functions support. */
2709 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2710 unique line tables, so we maintain a separate table of all .debug_line
2711 derived entries to support the sharing.
2712 All the quick functions need is the list of file names. We discard the
2713 line_header when we're done and don't need to record it here. */
2714 struct quick_file_names
2716 /* The data used to construct the hash key. */
2717 struct stmt_list_hash hash
;
2719 /* The number of entries in file_names, real_names. */
2720 unsigned int num_file_names
;
2722 /* The file names from the line table, after being run through
2724 const char **file_names
;
2726 /* The file names from the line table after being run through
2727 gdb_realpath. These are computed lazily. */
2728 const char **real_names
;
2731 /* When using the index (and thus not using psymtabs), each CU has an
2732 object of this type. This is used to hold information needed by
2733 the various "quick" methods. */
2734 struct dwarf2_per_cu_quick_data
2736 /* The file table. This can be NULL if there was no file table
2737 or it's currently not read in.
2738 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2739 struct quick_file_names
*file_names
;
2741 /* The corresponding symbol table. This is NULL if symbols for this
2742 CU have not yet been read. */
2743 struct compunit_symtab
*compunit_symtab
;
2745 /* A temporary mark bit used when iterating over all CUs in
2746 expand_symtabs_matching. */
2747 unsigned int mark
: 1;
2749 /* True if we've tried to read the file table and found there isn't one.
2750 There will be no point in trying to read it again next time. */
2751 unsigned int no_file_data
: 1;
2754 /* Utility hash function for a stmt_list_hash. */
2757 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2761 if (stmt_list_hash
->dwo_unit
!= NULL
)
2762 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2763 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2767 /* Utility equality function for a stmt_list_hash. */
2770 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2771 const struct stmt_list_hash
*rhs
)
2773 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2775 if (lhs
->dwo_unit
!= NULL
2776 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2779 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2782 /* Hash function for a quick_file_names. */
2785 hash_file_name_entry (const void *e
)
2787 const struct quick_file_names
*file_data
2788 = (const struct quick_file_names
*) e
;
2790 return hash_stmt_list_entry (&file_data
->hash
);
2793 /* Equality function for a quick_file_names. */
2796 eq_file_name_entry (const void *a
, const void *b
)
2798 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2799 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2801 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2804 /* Delete function for a quick_file_names. */
2807 delete_file_name_entry (void *e
)
2809 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2812 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2814 xfree ((void*) file_data
->file_names
[i
]);
2815 if (file_data
->real_names
)
2816 xfree ((void*) file_data
->real_names
[i
]);
2819 /* The space for the struct itself lives on objfile_obstack,
2820 so we don't free it here. */
2823 /* Create a quick_file_names hash table. */
2826 create_quick_file_names_table (unsigned int nr_initial_entries
)
2828 return htab_create_alloc (nr_initial_entries
,
2829 hash_file_name_entry
, eq_file_name_entry
,
2830 delete_file_name_entry
, xcalloc
, xfree
);
2833 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2834 have to be created afterwards. You should call age_cached_comp_units after
2835 processing PER_CU->CU. dw2_setup must have been already called. */
2838 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2840 if (per_cu
->is_debug_types
)
2841 load_full_type_unit (per_cu
);
2843 load_full_comp_unit (per_cu
, language_minimal
);
2845 if (per_cu
->cu
== NULL
)
2846 return; /* Dummy CU. */
2848 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2851 /* Read in the symbols for PER_CU. */
2854 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2856 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2858 /* Skip type_unit_groups, reading the type units they contain
2859 is handled elsewhere. */
2860 if (IS_TYPE_UNIT_GROUP (per_cu
))
2863 /* The destructor of dwarf2_queue_guard frees any entries left on
2864 the queue. After this point we're guaranteed to leave this function
2865 with the dwarf queue empty. */
2866 dwarf2_queue_guard q_guard
;
2868 if (dwarf2_per_objfile
->using_index
2869 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2870 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2872 queue_comp_unit (per_cu
, language_minimal
);
2875 /* If we just loaded a CU from a DWO, and we're working with an index
2876 that may badly handle TUs, load all the TUs in that DWO as well.
2877 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2878 if (!per_cu
->is_debug_types
2879 && per_cu
->cu
!= NULL
2880 && per_cu
->cu
->dwo_unit
!= NULL
2881 && dwarf2_per_objfile
->index_table
!= NULL
2882 && dwarf2_per_objfile
->index_table
->version
<= 7
2883 /* DWP files aren't supported yet. */
2884 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2885 queue_and_load_all_dwo_tus (per_cu
);
2888 process_queue (dwarf2_per_objfile
);
2890 /* Age the cache, releasing compilation units that have not
2891 been used recently. */
2892 age_cached_comp_units (dwarf2_per_objfile
);
2895 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2896 the objfile from which this CU came. Returns the resulting symbol
2899 static struct compunit_symtab
*
2900 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2902 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2904 gdb_assert (dwarf2_per_objfile
->using_index
);
2905 if (!per_cu
->v
.quick
->compunit_symtab
)
2907 free_cached_comp_units
freer (dwarf2_per_objfile
);
2908 scoped_restore decrementer
= increment_reading_symtab ();
2909 dw2_do_instantiate_symtab (per_cu
);
2910 process_cu_includes (dwarf2_per_objfile
);
2913 return per_cu
->v
.quick
->compunit_symtab
;
2916 /* See declaration. */
2918 dwarf2_per_cu_data
*
2919 dwarf2_per_objfile::get_cutu (int index
)
2921 if (index
>= this->all_comp_units
.size ())
2923 index
-= this->all_comp_units
.size ();
2924 gdb_assert (index
< this->all_type_units
.size ());
2925 return &this->all_type_units
[index
]->per_cu
;
2928 return this->all_comp_units
[index
];
2931 /* See declaration. */
2933 dwarf2_per_cu_data
*
2934 dwarf2_per_objfile::get_cu (int index
)
2936 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2938 return this->all_comp_units
[index
];
2941 /* See declaration. */
2944 dwarf2_per_objfile::get_tu (int index
)
2946 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2948 return this->all_type_units
[index
];
2951 /* Return a new dwarf2_per_cu_data allocated on OBJFILE's
2952 objfile_obstack, and constructed with the specified field
2955 static dwarf2_per_cu_data
*
2956 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2957 struct dwarf2_section_info
*section
,
2959 sect_offset sect_off
, ULONGEST length
)
2961 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2962 dwarf2_per_cu_data
*the_cu
2963 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2964 struct dwarf2_per_cu_data
);
2965 the_cu
->sect_off
= sect_off
;
2966 the_cu
->length
= length
;
2967 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2968 the_cu
->section
= section
;
2969 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2970 struct dwarf2_per_cu_quick_data
);
2971 the_cu
->is_dwz
= is_dwz
;
2975 /* A helper for create_cus_from_index that handles a given list of
2979 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2980 const gdb_byte
*cu_list
, offset_type n_elements
,
2981 struct dwarf2_section_info
*section
,
2984 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2986 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2988 sect_offset sect_off
2989 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2990 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2993 dwarf2_per_cu_data
*per_cu
2994 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
2996 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
3000 /* Read the CU list from the mapped index, and use it to create all
3001 the CU objects for this objfile. */
3004 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3005 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
3006 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
3008 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
3009 dwarf2_per_objfile
->all_comp_units
.reserve
3010 ((cu_list_elements
+ dwz_elements
) / 2);
3012 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3013 &dwarf2_per_objfile
->info
, 0);
3015 if (dwz_elements
== 0)
3018 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3019 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
3023 /* Create the signatured type hash table from the index. */
3026 create_signatured_type_table_from_index
3027 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3028 struct dwarf2_section_info
*section
,
3029 const gdb_byte
*bytes
,
3030 offset_type elements
)
3032 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3034 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3035 dwarf2_per_objfile
->all_type_units
.reserve (elements
/ 3);
3037 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3039 for (offset_type i
= 0; i
< elements
; i
+= 3)
3041 struct signatured_type
*sig_type
;
3044 cu_offset type_offset_in_tu
;
3046 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3047 sect_offset sect_off
3048 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
3050 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
3052 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
3055 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3056 struct signatured_type
);
3057 sig_type
->signature
= signature
;
3058 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3059 sig_type
->per_cu
.is_debug_types
= 1;
3060 sig_type
->per_cu
.section
= section
;
3061 sig_type
->per_cu
.sect_off
= sect_off
;
3062 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3063 sig_type
->per_cu
.v
.quick
3064 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3065 struct dwarf2_per_cu_quick_data
);
3067 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3070 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3073 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3076 /* Create the signatured type hash table from .debug_names. */
3079 create_signatured_type_table_from_debug_names
3080 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3081 const mapped_debug_names
&map
,
3082 struct dwarf2_section_info
*section
,
3083 struct dwarf2_section_info
*abbrev_section
)
3085 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3087 dwarf2_read_section (objfile
, section
);
3088 dwarf2_read_section (objfile
, abbrev_section
);
3090 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3091 dwarf2_per_objfile
->all_type_units
.reserve (map
.tu_count
);
3093 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3095 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
3097 struct signatured_type
*sig_type
;
3100 sect_offset sect_off
3101 = (sect_offset
) (extract_unsigned_integer
3102 (map
.tu_table_reordered
+ i
* map
.offset_size
,
3104 map
.dwarf5_byte_order
));
3106 comp_unit_head cu_header
;
3107 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
3109 section
->buffer
+ to_underlying (sect_off
),
3112 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3113 struct signatured_type
);
3114 sig_type
->signature
= cu_header
.signature
;
3115 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
3116 sig_type
->per_cu
.is_debug_types
= 1;
3117 sig_type
->per_cu
.section
= section
;
3118 sig_type
->per_cu
.sect_off
= sect_off
;
3119 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3120 sig_type
->per_cu
.v
.quick
3121 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3122 struct dwarf2_per_cu_quick_data
);
3124 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3127 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3130 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3133 /* Read the address map data from the mapped index, and use it to
3134 populate the objfile's psymtabs_addrmap. */
3137 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3138 struct mapped_index
*index
)
3140 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3141 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3142 const gdb_byte
*iter
, *end
;
3143 struct addrmap
*mutable_map
;
3146 auto_obstack temp_obstack
;
3148 mutable_map
= addrmap_create_mutable (&temp_obstack
);
3150 iter
= index
->address_table
.data ();
3151 end
= iter
+ index
->address_table
.size ();
3153 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3157 ULONGEST hi
, lo
, cu_index
;
3158 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3160 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3162 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
3167 complaint (&symfile_complaints
,
3168 _(".gdb_index address table has invalid range (%s - %s)"),
3169 hex_string (lo
), hex_string (hi
));
3173 if (cu_index
>= dwarf2_per_objfile
->all_comp_units
.size ())
3175 complaint (&symfile_complaints
,
3176 _(".gdb_index address table has invalid CU number %u"),
3177 (unsigned) cu_index
);
3181 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
3182 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
3183 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
3184 dwarf2_per_objfile
->get_cu (cu_index
));
3187 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3188 &objfile
->objfile_obstack
);
3191 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
3192 populate the objfile's psymtabs_addrmap. */
3195 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3196 struct dwarf2_section_info
*section
)
3198 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3199 bfd
*abfd
= objfile
->obfd
;
3200 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3201 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
3202 SECT_OFF_TEXT (objfile
));
3204 auto_obstack temp_obstack
;
3205 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
3207 std::unordered_map
<sect_offset
,
3208 dwarf2_per_cu_data
*,
3209 gdb::hash_enum
<sect_offset
>>
3210 debug_info_offset_to_per_cu
;
3211 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3213 const auto insertpair
3214 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
3215 if (!insertpair
.second
)
3217 warning (_("Section .debug_aranges in %s has duplicate "
3218 "debug_info_offset %s, ignoring .debug_aranges."),
3219 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
3224 dwarf2_read_section (objfile
, section
);
3226 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
3228 const gdb_byte
*addr
= section
->buffer
;
3230 while (addr
< section
->buffer
+ section
->size
)
3232 const gdb_byte
*const entry_addr
= addr
;
3233 unsigned int bytes_read
;
3235 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
3239 const gdb_byte
*const entry_end
= addr
+ entry_length
;
3240 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
3241 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
3242 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
3244 warning (_("Section .debug_aranges in %s entry at offset %zu "
3245 "length %s exceeds section length %s, "
3246 "ignoring .debug_aranges."),
3247 objfile_name (objfile
), entry_addr
- section
->buffer
,
3248 plongest (bytes_read
+ entry_length
),
3249 pulongest (section
->size
));
3253 /* The version number. */
3254 const uint16_t version
= read_2_bytes (abfd
, addr
);
3258 warning (_("Section .debug_aranges in %s entry at offset %zu "
3259 "has unsupported version %d, ignoring .debug_aranges."),
3260 objfile_name (objfile
), entry_addr
- section
->buffer
,
3265 const uint64_t debug_info_offset
3266 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
3267 addr
+= offset_size
;
3268 const auto per_cu_it
3269 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
3270 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
3272 warning (_("Section .debug_aranges in %s entry at offset %zu "
3273 "debug_info_offset %s does not exists, "
3274 "ignoring .debug_aranges."),
3275 objfile_name (objfile
), entry_addr
- section
->buffer
,
3276 pulongest (debug_info_offset
));
3279 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
3281 const uint8_t address_size
= *addr
++;
3282 if (address_size
< 1 || address_size
> 8)
3284 warning (_("Section .debug_aranges in %s entry at offset %zu "
3285 "address_size %u is invalid, ignoring .debug_aranges."),
3286 objfile_name (objfile
), entry_addr
- section
->buffer
,
3291 const uint8_t segment_selector_size
= *addr
++;
3292 if (segment_selector_size
!= 0)
3294 warning (_("Section .debug_aranges in %s entry at offset %zu "
3295 "segment_selector_size %u is not supported, "
3296 "ignoring .debug_aranges."),
3297 objfile_name (objfile
), entry_addr
- section
->buffer
,
3298 segment_selector_size
);
3302 /* Must pad to an alignment boundary that is twice the address
3303 size. It is undocumented by the DWARF standard but GCC does
3305 for (size_t padding
= ((-(addr
- section
->buffer
))
3306 & (2 * address_size
- 1));
3307 padding
> 0; padding
--)
3310 warning (_("Section .debug_aranges in %s entry at offset %zu "
3311 "padding is not zero, ignoring .debug_aranges."),
3312 objfile_name (objfile
), entry_addr
- section
->buffer
);
3318 if (addr
+ 2 * address_size
> entry_end
)
3320 warning (_("Section .debug_aranges in %s entry at offset %zu "
3321 "address list is not properly terminated, "
3322 "ignoring .debug_aranges."),
3323 objfile_name (objfile
), entry_addr
- section
->buffer
);
3326 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
3328 addr
+= address_size
;
3329 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
3331 addr
+= address_size
;
3332 if (start
== 0 && length
== 0)
3334 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3336 /* Symbol was eliminated due to a COMDAT group. */
3339 ULONGEST end
= start
+ length
;
3340 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
);
3341 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
);
3342 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
3346 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3347 &objfile
->objfile_obstack
);
3350 /* Find a slot in the mapped index INDEX for the object named NAME.
3351 If NAME is found, set *VEC_OUT to point to the CU vector in the
3352 constant pool and return true. If NAME cannot be found, return
3356 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3357 offset_type
**vec_out
)
3360 offset_type slot
, step
;
3361 int (*cmp
) (const char *, const char *);
3363 gdb::unique_xmalloc_ptr
<char> without_params
;
3364 if (current_language
->la_language
== language_cplus
3365 || current_language
->la_language
== language_fortran
3366 || current_language
->la_language
== language_d
)
3368 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3371 if (strchr (name
, '(') != NULL
)
3373 without_params
= cp_remove_params (name
);
3375 if (without_params
!= NULL
)
3376 name
= without_params
.get ();
3380 /* Index version 4 did not support case insensitive searches. But the
3381 indices for case insensitive languages are built in lowercase, therefore
3382 simulate our NAME being searched is also lowercased. */
3383 hash
= mapped_index_string_hash ((index
->version
== 4
3384 && case_sensitivity
== case_sensitive_off
3385 ? 5 : index
->version
),
3388 slot
= hash
& (index
->symbol_table
.size () - 1);
3389 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
3390 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3396 const auto &bucket
= index
->symbol_table
[slot
];
3397 if (bucket
.name
== 0 && bucket
.vec
== 0)
3400 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
3401 if (!cmp (name
, str
))
3403 *vec_out
= (offset_type
*) (index
->constant_pool
3404 + MAYBE_SWAP (bucket
.vec
));
3408 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
3412 /* A helper function that reads the .gdb_index from SECTION and fills
3413 in MAP. FILENAME is the name of the file containing the section;
3414 it is used for error reporting. DEPRECATED_OK is nonzero if it is
3415 ok to use deprecated sections.
3417 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3418 out parameters that are filled in with information about the CU and
3419 TU lists in the section.
3421 Returns 1 if all went well, 0 otherwise. */
3424 read_index_from_section (struct objfile
*objfile
,
3425 const char *filename
,
3427 struct dwarf2_section_info
*section
,
3428 struct mapped_index
*map
,
3429 const gdb_byte
**cu_list
,
3430 offset_type
*cu_list_elements
,
3431 const gdb_byte
**types_list
,
3432 offset_type
*types_list_elements
)
3434 const gdb_byte
*addr
;
3435 offset_type version
;
3436 offset_type
*metadata
;
3439 if (dwarf2_section_empty_p (section
))
3442 /* Older elfutils strip versions could keep the section in the main
3443 executable while splitting it for the separate debug info file. */
3444 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3447 dwarf2_read_section (objfile
, section
);
3449 addr
= section
->buffer
;
3450 /* Version check. */
3451 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3452 /* Versions earlier than 3 emitted every copy of a psymbol. This
3453 causes the index to behave very poorly for certain requests. Version 3
3454 contained incomplete addrmap. So, it seems better to just ignore such
3458 static int warning_printed
= 0;
3459 if (!warning_printed
)
3461 warning (_("Skipping obsolete .gdb_index section in %s."),
3463 warning_printed
= 1;
3467 /* Index version 4 uses a different hash function than index version
3470 Versions earlier than 6 did not emit psymbols for inlined
3471 functions. Using these files will cause GDB not to be able to
3472 set breakpoints on inlined functions by name, so we ignore these
3473 indices unless the user has done
3474 "set use-deprecated-index-sections on". */
3475 if (version
< 6 && !deprecated_ok
)
3477 static int warning_printed
= 0;
3478 if (!warning_printed
)
3481 Skipping deprecated .gdb_index section in %s.\n\
3482 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3483 to use the section anyway."),
3485 warning_printed
= 1;
3489 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3490 of the TU (for symbols coming from TUs),
3491 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3492 Plus gold-generated indices can have duplicate entries for global symbols,
3493 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3494 These are just performance bugs, and we can't distinguish gdb-generated
3495 indices from gold-generated ones, so issue no warning here. */
3497 /* Indexes with higher version than the one supported by GDB may be no
3498 longer backward compatible. */
3502 map
->version
= version
;
3503 map
->total_size
= section
->size
;
3505 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3508 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3509 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3513 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3514 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3515 - MAYBE_SWAP (metadata
[i
]))
3519 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3520 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3522 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3525 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3526 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3528 = gdb::array_view
<mapped_index::symbol_table_slot
>
3529 ((mapped_index::symbol_table_slot
*) symbol_table
,
3530 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3533 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3538 /* Read .gdb_index. If everything went ok, initialize the "quick"
3539 elements of all the CUs and return 1. Otherwise, return 0. */
3542 dwarf2_read_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
3544 struct mapped_index local_map
, *map
;
3545 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3546 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3547 struct dwz_file
*dwz
;
3548 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3550 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3551 use_deprecated_index_sections
,
3552 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3553 &cu_list
, &cu_list_elements
,
3554 &types_list
, &types_list_elements
))
3557 /* Don't use the index if it's empty. */
3558 if (local_map
.symbol_table
.empty ())
3561 /* If there is a .dwz file, read it so we can get its CU list as
3563 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3566 struct mapped_index dwz_map
;
3567 const gdb_byte
*dwz_types_ignore
;
3568 offset_type dwz_types_elements_ignore
;
3570 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3572 &dwz
->gdb_index
, &dwz_map
,
3573 &dwz_list
, &dwz_list_elements
,
3575 &dwz_types_elements_ignore
))
3577 warning (_("could not read '.gdb_index' section from %s; skipping"),
3578 bfd_get_filename (dwz
->dwz_bfd
));
3583 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3584 dwz_list
, dwz_list_elements
);
3586 if (types_list_elements
)
3588 struct dwarf2_section_info
*section
;
3590 /* We can only handle a single .debug_types when we have an
3592 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3595 section
= VEC_index (dwarf2_section_info_def
,
3596 dwarf2_per_objfile
->types
, 0);
3598 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3599 types_list
, types_list_elements
);
3602 create_addrmap_from_index (dwarf2_per_objfile
, &local_map
);
3604 map
= XOBNEW (&objfile
->objfile_obstack
, struct mapped_index
);
3605 map
= new (map
) mapped_index ();
3608 dwarf2_per_objfile
->index_table
= map
;
3609 dwarf2_per_objfile
->using_index
= 1;
3610 dwarf2_per_objfile
->quick_file_names_table
=
3611 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
3616 /* die_reader_func for dw2_get_file_names. */
3619 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3620 const gdb_byte
*info_ptr
,
3621 struct die_info
*comp_unit_die
,
3625 struct dwarf2_cu
*cu
= reader
->cu
;
3626 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3627 struct dwarf2_per_objfile
*dwarf2_per_objfile
3628 = cu
->per_cu
->dwarf2_per_objfile
;
3629 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3630 struct dwarf2_per_cu_data
*lh_cu
;
3631 struct attribute
*attr
;
3634 struct quick_file_names
*qfn
;
3636 gdb_assert (! this_cu
->is_debug_types
);
3638 /* Our callers never want to match partial units -- instead they
3639 will match the enclosing full CU. */
3640 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3642 this_cu
->v
.quick
->no_file_data
= 1;
3650 sect_offset line_offset
{};
3652 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3655 struct quick_file_names find_entry
;
3657 line_offset
= (sect_offset
) DW_UNSND (attr
);
3659 /* We may have already read in this line header (TU line header sharing).
3660 If we have we're done. */
3661 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3662 find_entry
.hash
.line_sect_off
= line_offset
;
3663 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3664 &find_entry
, INSERT
);
3667 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3671 lh
= dwarf_decode_line_header (line_offset
, cu
);
3675 lh_cu
->v
.quick
->no_file_data
= 1;
3679 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3680 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3681 qfn
->hash
.line_sect_off
= line_offset
;
3682 gdb_assert (slot
!= NULL
);
3685 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3687 qfn
->num_file_names
= lh
->file_names
.size ();
3689 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->file_names
.size ());
3690 for (i
= 0; i
< lh
->file_names
.size (); ++i
)
3691 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
3692 qfn
->real_names
= NULL
;
3694 lh_cu
->v
.quick
->file_names
= qfn
;
3697 /* A helper for the "quick" functions which attempts to read the line
3698 table for THIS_CU. */
3700 static struct quick_file_names
*
3701 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3703 /* This should never be called for TUs. */
3704 gdb_assert (! this_cu
->is_debug_types
);
3705 /* Nor type unit groups. */
3706 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3708 if (this_cu
->v
.quick
->file_names
!= NULL
)
3709 return this_cu
->v
.quick
->file_names
;
3710 /* If we know there is no line data, no point in looking again. */
3711 if (this_cu
->v
.quick
->no_file_data
)
3714 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3716 if (this_cu
->v
.quick
->no_file_data
)
3718 return this_cu
->v
.quick
->file_names
;
3721 /* A helper for the "quick" functions which computes and caches the
3722 real path for a given file name from the line table. */
3725 dw2_get_real_path (struct objfile
*objfile
,
3726 struct quick_file_names
*qfn
, int index
)
3728 if (qfn
->real_names
== NULL
)
3729 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3730 qfn
->num_file_names
, const char *);
3732 if (qfn
->real_names
[index
] == NULL
)
3733 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3735 return qfn
->real_names
[index
];
3738 static struct symtab
*
3739 dw2_find_last_source_symtab (struct objfile
*objfile
)
3741 struct dwarf2_per_objfile
*dwarf2_per_objfile
3742 = get_dwarf2_per_objfile (objfile
);
3743 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->all_comp_units
.back ();
3744 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
);
3749 return compunit_primary_filetab (cust
);
3752 /* Traversal function for dw2_forget_cached_source_info. */
3755 dw2_free_cached_file_names (void **slot
, void *info
)
3757 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3759 if (file_data
->real_names
)
3763 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3765 xfree ((void*) file_data
->real_names
[i
]);
3766 file_data
->real_names
[i
] = NULL
;
3774 dw2_forget_cached_source_info (struct objfile
*objfile
)
3776 struct dwarf2_per_objfile
*dwarf2_per_objfile
3777 = get_dwarf2_per_objfile (objfile
);
3779 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3780 dw2_free_cached_file_names
, NULL
);
3783 /* Helper function for dw2_map_symtabs_matching_filename that expands
3784 the symtabs and calls the iterator. */
3787 dw2_map_expand_apply (struct objfile
*objfile
,
3788 struct dwarf2_per_cu_data
*per_cu
,
3789 const char *name
, const char *real_path
,
3790 gdb::function_view
<bool (symtab
*)> callback
)
3792 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3794 /* Don't visit already-expanded CUs. */
3795 if (per_cu
->v
.quick
->compunit_symtab
)
3798 /* This may expand more than one symtab, and we want to iterate over
3800 dw2_instantiate_symtab (per_cu
);
3802 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3803 last_made
, callback
);
3806 /* Implementation of the map_symtabs_matching_filename method. */
3809 dw2_map_symtabs_matching_filename
3810 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3811 gdb::function_view
<bool (symtab
*)> callback
)
3813 const char *name_basename
= lbasename (name
);
3814 struct dwarf2_per_objfile
*dwarf2_per_objfile
3815 = get_dwarf2_per_objfile (objfile
);
3817 /* The rule is CUs specify all the files, including those used by
3818 any TU, so there's no need to scan TUs here. */
3820 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3822 /* We only need to look at symtabs not already expanded. */
3823 if (per_cu
->v
.quick
->compunit_symtab
)
3826 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3827 if (file_data
== NULL
)
3830 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3832 const char *this_name
= file_data
->file_names
[j
];
3833 const char *this_real_name
;
3835 if (compare_filenames_for_search (this_name
, name
))
3837 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3843 /* Before we invoke realpath, which can get expensive when many
3844 files are involved, do a quick comparison of the basenames. */
3845 if (! basenames_may_differ
3846 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3849 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3850 if (compare_filenames_for_search (this_real_name
, name
))
3852 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3858 if (real_path
!= NULL
)
3860 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3861 gdb_assert (IS_ABSOLUTE_PATH (name
));
3862 if (this_real_name
!= NULL
3863 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3865 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3877 /* Struct used to manage iterating over all CUs looking for a symbol. */
3879 struct dw2_symtab_iterator
3881 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3882 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3883 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3884 int want_specific_block
;
3885 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3886 Unused if !WANT_SPECIFIC_BLOCK. */
3888 /* The kind of symbol we're looking for. */
3890 /* The list of CUs from the index entry of the symbol,
3891 or NULL if not found. */
3893 /* The next element in VEC to look at. */
3895 /* The number of elements in VEC, or zero if there is no match. */
3897 /* Have we seen a global version of the symbol?
3898 If so we can ignore all further global instances.
3899 This is to work around gold/15646, inefficient gold-generated
3904 /* Initialize the index symtab iterator ITER.
3905 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3906 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3909 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3910 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3911 int want_specific_block
,
3916 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3917 iter
->want_specific_block
= want_specific_block
;
3918 iter
->block_index
= block_index
;
3919 iter
->domain
= domain
;
3921 iter
->global_seen
= 0;
3923 mapped_index
*index
= dwarf2_per_objfile
->index_table
;
3925 /* index is NULL if OBJF_READNOW. */
3926 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3927 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3935 /* Return the next matching CU or NULL if there are no more. */
3937 static struct dwarf2_per_cu_data
*
3938 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3940 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3942 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3944 offset_type cu_index_and_attrs
=
3945 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3946 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3947 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3948 /* This value is only valid for index versions >= 7. */
3949 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3950 gdb_index_symbol_kind symbol_kind
=
3951 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3952 /* Only check the symbol attributes if they're present.
3953 Indices prior to version 7 don't record them,
3954 and indices >= 7 may elide them for certain symbols
3955 (gold does this). */
3957 (dwarf2_per_objfile
->index_table
->version
>= 7
3958 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3960 /* Don't crash on bad data. */
3961 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
3962 + dwarf2_per_objfile
->all_type_units
.size ()))
3964 complaint (&symfile_complaints
,
3965 _(".gdb_index entry has bad CU index"
3967 objfile_name (dwarf2_per_objfile
->objfile
));
3971 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
3973 /* Skip if already read in. */
3974 if (per_cu
->v
.quick
->compunit_symtab
)
3977 /* Check static vs global. */
3980 if (iter
->want_specific_block
3981 && want_static
!= is_static
)
3983 /* Work around gold/15646. */
3984 if (!is_static
&& iter
->global_seen
)
3987 iter
->global_seen
= 1;
3990 /* Only check the symbol's kind if it has one. */
3993 switch (iter
->domain
)
3996 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3997 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3998 /* Some types are also in VAR_DOMAIN. */
3999 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4003 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4007 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4022 static struct compunit_symtab
*
4023 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
4024 const char *name
, domain_enum domain
)
4026 struct compunit_symtab
*stab_best
= NULL
;
4027 struct dwarf2_per_objfile
*dwarf2_per_objfile
4028 = get_dwarf2_per_objfile (objfile
);
4030 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
4032 struct dw2_symtab_iterator iter
;
4033 struct dwarf2_per_cu_data
*per_cu
;
4035 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 1, block_index
, domain
, name
);
4037 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4039 struct symbol
*sym
, *with_opaque
= NULL
;
4040 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
4041 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
4042 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
4044 sym
= block_find_symbol (block
, name
, domain
,
4045 block_find_non_opaque_type_preferred
,
4048 /* Some caution must be observed with overloaded functions
4049 and methods, since the index will not contain any overload
4050 information (but NAME might contain it). */
4053 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
4055 if (with_opaque
!= NULL
4056 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
4059 /* Keep looking through other CUs. */
4066 dw2_print_stats (struct objfile
*objfile
)
4068 struct dwarf2_per_objfile
*dwarf2_per_objfile
4069 = get_dwarf2_per_objfile (objfile
);
4070 int total
= (dwarf2_per_objfile
->all_comp_units
.size ()
4071 + dwarf2_per_objfile
->all_type_units
.size ());
4074 for (int i
= 0; i
< total
; ++i
)
4076 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4078 if (!per_cu
->v
.quick
->compunit_symtab
)
4081 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
4082 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
4085 /* This dumps minimal information about the index.
4086 It is called via "mt print objfiles".
4087 One use is to verify .gdb_index has been loaded by the
4088 gdb.dwarf2/gdb-index.exp testcase. */
4091 dw2_dump (struct objfile
*objfile
)
4093 struct dwarf2_per_objfile
*dwarf2_per_objfile
4094 = get_dwarf2_per_objfile (objfile
);
4096 gdb_assert (dwarf2_per_objfile
->using_index
);
4097 printf_filtered (".gdb_index:");
4098 if (dwarf2_per_objfile
->index_table
!= NULL
)
4100 printf_filtered (" version %d\n",
4101 dwarf2_per_objfile
->index_table
->version
);
4104 printf_filtered (" faked for \"readnow\"\n");
4105 printf_filtered ("\n");
4109 dw2_relocate (struct objfile
*objfile
,
4110 const struct section_offsets
*new_offsets
,
4111 const struct section_offsets
*delta
)
4113 /* There's nothing to relocate here. */
4117 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
4118 const char *func_name
)
4120 struct dwarf2_per_objfile
*dwarf2_per_objfile
4121 = get_dwarf2_per_objfile (objfile
);
4123 struct dw2_symtab_iterator iter
;
4124 struct dwarf2_per_cu_data
*per_cu
;
4126 /* Note: It doesn't matter what we pass for block_index here. */
4127 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
4130 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4131 dw2_instantiate_symtab (per_cu
);
4136 dw2_expand_all_symtabs (struct objfile
*objfile
)
4138 struct dwarf2_per_objfile
*dwarf2_per_objfile
4139 = get_dwarf2_per_objfile (objfile
);
4140 int total_units
= (dwarf2_per_objfile
->all_comp_units
.size ()
4141 + dwarf2_per_objfile
->all_type_units
.size ());
4143 for (int i
= 0; i
< total_units
; ++i
)
4145 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4147 dw2_instantiate_symtab (per_cu
);
4152 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
4153 const char *fullname
)
4155 struct dwarf2_per_objfile
*dwarf2_per_objfile
4156 = get_dwarf2_per_objfile (objfile
);
4158 /* We don't need to consider type units here.
4159 This is only called for examining code, e.g. expand_line_sal.
4160 There can be an order of magnitude (or more) more type units
4161 than comp units, and we avoid them if we can. */
4163 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4165 /* We only need to look at symtabs not already expanded. */
4166 if (per_cu
->v
.quick
->compunit_symtab
)
4169 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4170 if (file_data
== NULL
)
4173 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4175 const char *this_fullname
= file_data
->file_names
[j
];
4177 if (filename_cmp (this_fullname
, fullname
) == 0)
4179 dw2_instantiate_symtab (per_cu
);
4187 dw2_map_matching_symbols (struct objfile
*objfile
,
4188 const char * name
, domain_enum domain
,
4190 int (*callback
) (struct block
*,
4191 struct symbol
*, void *),
4192 void *data
, symbol_name_match_type match
,
4193 symbol_compare_ftype
*ordered_compare
)
4195 /* Currently unimplemented; used for Ada. The function can be called if the
4196 current language is Ada for a non-Ada objfile using GNU index. As Ada
4197 does not look for non-Ada symbols this function should just return. */
4200 /* Symbol name matcher for .gdb_index names.
4202 Symbol names in .gdb_index have a few particularities:
4204 - There's no indication of which is the language of each symbol.
4206 Since each language has its own symbol name matching algorithm,
4207 and we don't know which language is the right one, we must match
4208 each symbol against all languages. This would be a potential
4209 performance problem if it were not mitigated by the
4210 mapped_index::name_components lookup table, which significantly
4211 reduces the number of times we need to call into this matcher,
4212 making it a non-issue.
4214 - Symbol names in the index have no overload (parameter)
4215 information. I.e., in C++, "foo(int)" and "foo(long)" both
4216 appear as "foo" in the index, for example.
4218 This means that the lookup names passed to the symbol name
4219 matcher functions must have no parameter information either
4220 because (e.g.) symbol search name "foo" does not match
4221 lookup-name "foo(int)" [while swapping search name for lookup
4224 class gdb_index_symbol_name_matcher
4227 /* Prepares the vector of comparison functions for LOOKUP_NAME. */
4228 gdb_index_symbol_name_matcher (const lookup_name_info
&lookup_name
);
4230 /* Walk all the matcher routines and match SYMBOL_NAME against them.
4231 Returns true if any matcher matches. */
4232 bool matches (const char *symbol_name
);
4235 /* A reference to the lookup name we're matching against. */
4236 const lookup_name_info
&m_lookup_name
;
4238 /* A vector holding all the different symbol name matchers, for all
4240 std::vector
<symbol_name_matcher_ftype
*> m_symbol_name_matcher_funcs
;
4243 gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher
4244 (const lookup_name_info
&lookup_name
)
4245 : m_lookup_name (lookup_name
)
4247 /* Prepare the vector of comparison functions upfront, to avoid
4248 doing the same work for each symbol. Care is taken to avoid
4249 matching with the same matcher more than once if/when multiple
4250 languages use the same matcher function. */
4251 auto &matchers
= m_symbol_name_matcher_funcs
;
4252 matchers
.reserve (nr_languages
);
4254 matchers
.push_back (default_symbol_name_matcher
);
4256 for (int i
= 0; i
< nr_languages
; i
++)
4258 const language_defn
*lang
= language_def ((enum language
) i
);
4259 symbol_name_matcher_ftype
*name_matcher
4260 = get_symbol_name_matcher (lang
, m_lookup_name
);
4262 /* Don't insert the same comparison routine more than once.
4263 Note that we do this linear walk instead of a seemingly
4264 cheaper sorted insert, or use a std::set or something like
4265 that, because relative order of function addresses is not
4266 stable. This is not a problem in practice because the number
4267 of supported languages is low, and the cost here is tiny
4268 compared to the number of searches we'll do afterwards using
4270 if (name_matcher
!= default_symbol_name_matcher
4271 && (std::find (matchers
.begin (), matchers
.end (), name_matcher
)
4272 == matchers
.end ()))
4273 matchers
.push_back (name_matcher
);
4278 gdb_index_symbol_name_matcher::matches (const char *symbol_name
)
4280 for (auto matches_name
: m_symbol_name_matcher_funcs
)
4281 if (matches_name (symbol_name
, m_lookup_name
, NULL
))
4287 /* Starting from a search name, return the string that finds the upper
4288 bound of all strings that start with SEARCH_NAME in a sorted name
4289 list. Returns the empty string to indicate that the upper bound is
4290 the end of the list. */
4293 make_sort_after_prefix_name (const char *search_name
)
4295 /* When looking to complete "func", we find the upper bound of all
4296 symbols that start with "func" by looking for where we'd insert
4297 the closest string that would follow "func" in lexicographical
4298 order. Usually, that's "func"-with-last-character-incremented,
4299 i.e. "fund". Mind non-ASCII characters, though. Usually those
4300 will be UTF-8 multi-byte sequences, but we can't be certain.
4301 Especially mind the 0xff character, which is a valid character in
4302 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
4303 rule out compilers allowing it in identifiers. Note that
4304 conveniently, strcmp/strcasecmp are specified to compare
4305 characters interpreted as unsigned char. So what we do is treat
4306 the whole string as a base 256 number composed of a sequence of
4307 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
4308 to 0, and carries 1 to the following more-significant position.
4309 If the very first character in SEARCH_NAME ends up incremented
4310 and carries/overflows, then the upper bound is the end of the
4311 list. The string after the empty string is also the empty
4314 Some examples of this operation:
4316 SEARCH_NAME => "+1" RESULT
4320 "\xff" "a" "\xff" => "\xff" "b"
4325 Then, with these symbols for example:
4331 completing "func" looks for symbols between "func" and
4332 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
4333 which finds "func" and "func1", but not "fund".
4337 funcÿ (Latin1 'ÿ' [0xff])
4341 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
4342 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
4346 ÿÿ (Latin1 'ÿ' [0xff])
4349 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
4350 the end of the list.
4352 std::string after
= search_name
;
4353 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
4355 if (!after
.empty ())
4356 after
.back () = (unsigned char) after
.back () + 1;
4360 /* See declaration. */
4362 std::pair
<std::vector
<name_component
>::const_iterator
,
4363 std::vector
<name_component
>::const_iterator
>
4364 mapped_index_base::find_name_components_bounds
4365 (const lookup_name_info
&lookup_name_without_params
) const
4368 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4371 = lookup_name_without_params
.cplus ().lookup_name ().c_str ();
4373 /* Comparison function object for lower_bound that matches against a
4374 given symbol name. */
4375 auto lookup_compare_lower
= [&] (const name_component
&elem
,
4378 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4379 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4380 return name_cmp (elem_name
, name
) < 0;
4383 /* Comparison function object for upper_bound that matches against a
4384 given symbol name. */
4385 auto lookup_compare_upper
= [&] (const char *name
,
4386 const name_component
&elem
)
4388 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4389 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4390 return name_cmp (name
, elem_name
) < 0;
4393 auto begin
= this->name_components
.begin ();
4394 auto end
= this->name_components
.end ();
4396 /* Find the lower bound. */
4399 if (lookup_name_without_params
.completion_mode () && cplus
[0] == '\0')
4402 return std::lower_bound (begin
, end
, cplus
, lookup_compare_lower
);
4405 /* Find the upper bound. */
4408 if (lookup_name_without_params
.completion_mode ())
4410 /* In completion mode, we want UPPER to point past all
4411 symbols names that have the same prefix. I.e., with
4412 these symbols, and completing "func":
4414 function << lower bound
4416 other_function << upper bound
4418 We find the upper bound by looking for the insertion
4419 point of "func"-with-last-character-incremented,
4421 std::string after
= make_sort_after_prefix_name (cplus
);
4424 return std::lower_bound (lower
, end
, after
.c_str (),
4425 lookup_compare_lower
);
4428 return std::upper_bound (lower
, end
, cplus
, lookup_compare_upper
);
4431 return {lower
, upper
};
4434 /* See declaration. */
4437 mapped_index_base::build_name_components ()
4439 if (!this->name_components
.empty ())
4442 this->name_components_casing
= case_sensitivity
;
4444 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4446 /* The code below only knows how to break apart components of C++
4447 symbol names (and other languages that use '::' as
4448 namespace/module separator). If we add support for wild matching
4449 to some language that uses some other operator (E.g., Ada, Go and
4450 D use '.'), then we'll need to try splitting the symbol name
4451 according to that language too. Note that Ada does support wild
4452 matching, but doesn't currently support .gdb_index. */
4453 auto count
= this->symbol_name_count ();
4454 for (offset_type idx
= 0; idx
< count
; idx
++)
4456 if (this->symbol_name_slot_invalid (idx
))
4459 const char *name
= this->symbol_name_at (idx
);
4461 /* Add each name component to the name component table. */
4462 unsigned int previous_len
= 0;
4463 for (unsigned int current_len
= cp_find_first_component (name
);
4464 name
[current_len
] != '\0';
4465 current_len
+= cp_find_first_component (name
+ current_len
))
4467 gdb_assert (name
[current_len
] == ':');
4468 this->name_components
.push_back ({previous_len
, idx
});
4469 /* Skip the '::'. */
4471 previous_len
= current_len
;
4473 this->name_components
.push_back ({previous_len
, idx
});
4476 /* Sort name_components elements by name. */
4477 auto name_comp_compare
= [&] (const name_component
&left
,
4478 const name_component
&right
)
4480 const char *left_qualified
= this->symbol_name_at (left
.idx
);
4481 const char *right_qualified
= this->symbol_name_at (right
.idx
);
4483 const char *left_name
= left_qualified
+ left
.name_offset
;
4484 const char *right_name
= right_qualified
+ right
.name_offset
;
4486 return name_cmp (left_name
, right_name
) < 0;
4489 std::sort (this->name_components
.begin (),
4490 this->name_components
.end (),
4494 /* Helper for dw2_expand_symtabs_matching that works with a
4495 mapped_index_base instead of the containing objfile. This is split
4496 to a separate function in order to be able to unit test the
4497 name_components matching using a mock mapped_index_base. For each
4498 symbol name that matches, calls MATCH_CALLBACK, passing it the
4499 symbol's index in the mapped_index_base symbol table. */
4502 dw2_expand_symtabs_matching_symbol
4503 (mapped_index_base
&index
,
4504 const lookup_name_info
&lookup_name_in
,
4505 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4506 enum search_domain kind
,
4507 gdb::function_view
<void (offset_type
)> match_callback
)
4509 lookup_name_info lookup_name_without_params
4510 = lookup_name_in
.make_ignore_params ();
4511 gdb_index_symbol_name_matcher lookup_name_matcher
4512 (lookup_name_without_params
);
4514 /* Build the symbol name component sorted vector, if we haven't
4516 index
.build_name_components ();
4518 auto bounds
= index
.find_name_components_bounds (lookup_name_without_params
);
4520 /* Now for each symbol name in range, check to see if we have a name
4521 match, and if so, call the MATCH_CALLBACK callback. */
4523 /* The same symbol may appear more than once in the range though.
4524 E.g., if we're looking for symbols that complete "w", and we have
4525 a symbol named "w1::w2", we'll find the two name components for
4526 that same symbol in the range. To be sure we only call the
4527 callback once per symbol, we first collect the symbol name
4528 indexes that matched in a temporary vector and ignore
4530 std::vector
<offset_type
> matches
;
4531 matches
.reserve (std::distance (bounds
.first
, bounds
.second
));
4533 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4535 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4537 if (!lookup_name_matcher
.matches (qualified
)
4538 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4541 matches
.push_back (bounds
.first
->idx
);
4544 std::sort (matches
.begin (), matches
.end ());
4546 /* Finally call the callback, once per match. */
4548 for (offset_type idx
: matches
)
4552 match_callback (idx
);
4557 /* Above we use a type wider than idx's for 'prev', since 0 and
4558 (offset_type)-1 are both possible values. */
4559 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4564 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4566 /* A mock .gdb_index/.debug_names-like name index table, enough to
4567 exercise dw2_expand_symtabs_matching_symbol, which works with the
4568 mapped_index_base interface. Builds an index from the symbol list
4569 passed as parameter to the constructor. */
4570 class mock_mapped_index
: public mapped_index_base
4573 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4574 : m_symbol_table (symbols
)
4577 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4579 /* Return the number of names in the symbol table. */
4580 virtual size_t symbol_name_count () const
4582 return m_symbol_table
.size ();
4585 /* Get the name of the symbol at IDX in the symbol table. */
4586 virtual const char *symbol_name_at (offset_type idx
) const
4588 return m_symbol_table
[idx
];
4592 gdb::array_view
<const char *> m_symbol_table
;
4595 /* Convenience function that converts a NULL pointer to a "<null>"
4596 string, to pass to print routines. */
4599 string_or_null (const char *str
)
4601 return str
!= NULL
? str
: "<null>";
4604 /* Check if a lookup_name_info built from
4605 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4606 index. EXPECTED_LIST is the list of expected matches, in expected
4607 matching order. If no match expected, then an empty list is
4608 specified. Returns true on success. On failure prints a warning
4609 indicating the file:line that failed, and returns false. */
4612 check_match (const char *file
, int line
,
4613 mock_mapped_index
&mock_index
,
4614 const char *name
, symbol_name_match_type match_type
,
4615 bool completion_mode
,
4616 std::initializer_list
<const char *> expected_list
)
4618 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4620 bool matched
= true;
4622 auto mismatch
= [&] (const char *expected_str
,
4625 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4626 "expected=\"%s\", got=\"%s\"\n"),
4628 (match_type
== symbol_name_match_type::FULL
4630 name
, string_or_null (expected_str
), string_or_null (got
));
4634 auto expected_it
= expected_list
.begin ();
4635 auto expected_end
= expected_list
.end ();
4637 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4639 [&] (offset_type idx
)
4641 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4642 const char *expected_str
4643 = expected_it
== expected_end
? NULL
: *expected_it
++;
4645 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4646 mismatch (expected_str
, matched_name
);
4649 const char *expected_str
4650 = expected_it
== expected_end
? NULL
: *expected_it
++;
4651 if (expected_str
!= NULL
)
4652 mismatch (expected_str
, NULL
);
4657 /* The symbols added to the mock mapped_index for testing (in
4659 static const char *test_symbols
[] = {
4668 "ns2::tmpl<int>::foo2",
4669 "(anonymous namespace)::A::B::C",
4671 /* These are used to check that the increment-last-char in the
4672 matching algorithm for completion doesn't match "t1_fund" when
4673 completing "t1_func". */
4679 /* A UTF-8 name with multi-byte sequences to make sure that
4680 cp-name-parser understands this as a single identifier ("função"
4681 is "function" in PT). */
4684 /* \377 (0xff) is Latin1 'ÿ'. */
4687 /* \377 (0xff) is Latin1 'ÿ'. */
4691 /* A name with all sorts of complications. Starts with "z" to make
4692 it easier for the completion tests below. */
4693 #define Z_SYM_NAME \
4694 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4695 "::tuple<(anonymous namespace)::ui*, " \
4696 "std::default_delete<(anonymous namespace)::ui>, void>"
4701 /* Returns true if the mapped_index_base::find_name_component_bounds
4702 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4703 in completion mode. */
4706 check_find_bounds_finds (mapped_index_base
&index
,
4707 const char *search_name
,
4708 gdb::array_view
<const char *> expected_syms
)
4710 lookup_name_info
lookup_name (search_name
,
4711 symbol_name_match_type::FULL
, true);
4713 auto bounds
= index
.find_name_components_bounds (lookup_name
);
4715 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4716 if (distance
!= expected_syms
.size ())
4719 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4721 auto nc_elem
= bounds
.first
+ exp_elem
;
4722 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4723 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4730 /* Test the lower-level mapped_index::find_name_component_bounds
4734 test_mapped_index_find_name_component_bounds ()
4736 mock_mapped_index
mock_index (test_symbols
);
4738 mock_index
.build_name_components ();
4740 /* Test the lower-level mapped_index::find_name_component_bounds
4741 method in completion mode. */
4743 static const char *expected_syms
[] = {
4748 SELF_CHECK (check_find_bounds_finds (mock_index
,
4749 "t1_func", expected_syms
));
4752 /* Check that the increment-last-char in the name matching algorithm
4753 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4755 static const char *expected_syms1
[] = {
4759 SELF_CHECK (check_find_bounds_finds (mock_index
,
4760 "\377", expected_syms1
));
4762 static const char *expected_syms2
[] = {
4765 SELF_CHECK (check_find_bounds_finds (mock_index
,
4766 "\377\377", expected_syms2
));
4770 /* Test dw2_expand_symtabs_matching_symbol. */
4773 test_dw2_expand_symtabs_matching_symbol ()
4775 mock_mapped_index
mock_index (test_symbols
);
4777 /* We let all tests run until the end even if some fails, for debug
4779 bool any_mismatch
= false;
4781 /* Create the expected symbols list (an initializer_list). Needed
4782 because lists have commas, and we need to pass them to CHECK,
4783 which is a macro. */
4784 #define EXPECT(...) { __VA_ARGS__ }
4786 /* Wrapper for check_match that passes down the current
4787 __FILE__/__LINE__. */
4788 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4789 any_mismatch |= !check_match (__FILE__, __LINE__, \
4791 NAME, MATCH_TYPE, COMPLETION_MODE, \
4794 /* Identity checks. */
4795 for (const char *sym
: test_symbols
)
4797 /* Should be able to match all existing symbols. */
4798 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4801 /* Should be able to match all existing symbols with
4803 std::string with_params
= std::string (sym
) + "(int)";
4804 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4807 /* Should be able to match all existing symbols with
4808 parameters and qualifiers. */
4809 with_params
= std::string (sym
) + " ( int ) const";
4810 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4813 /* This should really find sym, but cp-name-parser.y doesn't
4814 know about lvalue/rvalue qualifiers yet. */
4815 with_params
= std::string (sym
) + " ( int ) &&";
4816 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4820 /* Check that the name matching algorithm for completion doesn't get
4821 confused with Latin1 'ÿ' / 0xff. */
4823 static const char str
[] = "\377";
4824 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4825 EXPECT ("\377", "\377\377123"));
4828 /* Check that the increment-last-char in the matching algorithm for
4829 completion doesn't match "t1_fund" when completing "t1_func". */
4831 static const char str
[] = "t1_func";
4832 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4833 EXPECT ("t1_func", "t1_func1"));
4836 /* Check that completion mode works at each prefix of the expected
4839 static const char str
[] = "function(int)";
4840 size_t len
= strlen (str
);
4843 for (size_t i
= 1; i
< len
; i
++)
4845 lookup
.assign (str
, i
);
4846 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4847 EXPECT ("function"));
4851 /* While "w" is a prefix of both components, the match function
4852 should still only be called once. */
4854 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4856 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4860 /* Same, with a "complicated" symbol. */
4862 static const char str
[] = Z_SYM_NAME
;
4863 size_t len
= strlen (str
);
4866 for (size_t i
= 1; i
< len
; i
++)
4868 lookup
.assign (str
, i
);
4869 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4870 EXPECT (Z_SYM_NAME
));
4874 /* In FULL mode, an incomplete symbol doesn't match. */
4876 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4880 /* A complete symbol with parameters matches any overload, since the
4881 index has no overload info. */
4883 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4884 EXPECT ("std::zfunction", "std::zfunction2"));
4885 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4886 EXPECT ("std::zfunction", "std::zfunction2"));
4887 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4888 EXPECT ("std::zfunction", "std::zfunction2"));
4891 /* Check that whitespace is ignored appropriately. A symbol with a
4892 template argument list. */
4894 static const char expected
[] = "ns::foo<int>";
4895 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4897 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4901 /* Check that whitespace is ignored appropriately. A symbol with a
4902 template argument list that includes a pointer. */
4904 static const char expected
[] = "ns::foo<char*>";
4905 /* Try both completion and non-completion modes. */
4906 static const bool completion_mode
[2] = {false, true};
4907 for (size_t i
= 0; i
< 2; i
++)
4909 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4910 completion_mode
[i
], EXPECT (expected
));
4911 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4912 completion_mode
[i
], EXPECT (expected
));
4914 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4915 completion_mode
[i
], EXPECT (expected
));
4916 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4917 completion_mode
[i
], EXPECT (expected
));
4922 /* Check method qualifiers are ignored. */
4923 static const char expected
[] = "ns::foo<char*>";
4924 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4925 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4926 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4927 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4928 CHECK_MATCH ("foo < char * > ( int ) const",
4929 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4930 CHECK_MATCH ("foo < char * > ( int ) &&",
4931 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4934 /* Test lookup names that don't match anything. */
4936 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4939 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4943 /* Some wild matching tests, exercising "(anonymous namespace)",
4944 which should not be confused with a parameter list. */
4946 static const char *syms
[] = {
4950 "A :: B :: C ( int )",
4955 for (const char *s
: syms
)
4957 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4958 EXPECT ("(anonymous namespace)::A::B::C"));
4963 static const char expected
[] = "ns2::tmpl<int>::foo2";
4964 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4966 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4970 SELF_CHECK (!any_mismatch
);
4979 test_mapped_index_find_name_component_bounds ();
4980 test_dw2_expand_symtabs_matching_symbol ();
4983 }} // namespace selftests::dw2_expand_symtabs_matching
4985 #endif /* GDB_SELF_TEST */
4987 /* If FILE_MATCHER is NULL or if PER_CU has
4988 dwarf2_per_cu_quick_data::MARK set (see
4989 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4990 EXPANSION_NOTIFY on it. */
4993 dw2_expand_symtabs_matching_one
4994 (struct dwarf2_per_cu_data
*per_cu
,
4995 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4996 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4998 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
5000 bool symtab_was_null
5001 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
5003 dw2_instantiate_symtab (per_cu
);
5005 if (expansion_notify
!= NULL
5007 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
5008 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
5012 /* Helper for dw2_expand_matching symtabs. Called on each symbol
5013 matched, to expand corresponding CUs that were marked. IDX is the
5014 index of the symbol name that matched. */
5017 dw2_expand_marked_cus
5018 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
5019 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5020 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5023 offset_type
*vec
, vec_len
, vec_idx
;
5024 bool global_seen
= false;
5025 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5027 vec
= (offset_type
*) (index
.constant_pool
5028 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
5029 vec_len
= MAYBE_SWAP (vec
[0]);
5030 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
5032 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
5033 /* This value is only valid for index versions >= 7. */
5034 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
5035 gdb_index_symbol_kind symbol_kind
=
5036 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
5037 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
5038 /* Only check the symbol attributes if they're present.
5039 Indices prior to version 7 don't record them,
5040 and indices >= 7 may elide them for certain symbols
5041 (gold does this). */
5044 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
5046 /* Work around gold/15646. */
5049 if (!is_static
&& global_seen
)
5055 /* Only check the symbol's kind if it has one. */
5060 case VARIABLES_DOMAIN
:
5061 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
5064 case FUNCTIONS_DOMAIN
:
5065 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
5069 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
5077 /* Don't crash on bad data. */
5078 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
5079 + dwarf2_per_objfile
->all_type_units
.size ()))
5081 complaint (&symfile_complaints
,
5082 _(".gdb_index entry has bad CU index"
5084 objfile_name (dwarf2_per_objfile
->objfile
));
5088 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
5089 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5094 /* If FILE_MATCHER is non-NULL, set all the
5095 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
5096 that match FILE_MATCHER. */
5099 dw_expand_symtabs_matching_file_matcher
5100 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5101 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
5103 if (file_matcher
== NULL
)
5106 objfile
*const objfile
= dwarf2_per_objfile
->objfile
;
5108 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
5110 NULL
, xcalloc
, xfree
));
5111 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
5113 NULL
, xcalloc
, xfree
));
5115 /* The rule is CUs specify all the files, including those used by
5116 any TU, so there's no need to scan TUs here. */
5118 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5122 per_cu
->v
.quick
->mark
= 0;
5124 /* We only need to look at symtabs not already expanded. */
5125 if (per_cu
->v
.quick
->compunit_symtab
)
5128 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5129 if (file_data
== NULL
)
5132 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
5134 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
5136 per_cu
->v
.quick
->mark
= 1;
5140 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5142 const char *this_real_name
;
5144 if (file_matcher (file_data
->file_names
[j
], false))
5146 per_cu
->v
.quick
->mark
= 1;
5150 /* Before we invoke realpath, which can get expensive when many
5151 files are involved, do a quick comparison of the basenames. */
5152 if (!basenames_may_differ
5153 && !file_matcher (lbasename (file_data
->file_names
[j
]),
5157 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
5158 if (file_matcher (this_real_name
, false))
5160 per_cu
->v
.quick
->mark
= 1;
5165 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
5166 ? visited_found
.get ()
5167 : visited_not_found
.get (),
5174 dw2_expand_symtabs_matching
5175 (struct objfile
*objfile
,
5176 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5177 const lookup_name_info
&lookup_name
,
5178 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5179 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5180 enum search_domain kind
)
5182 struct dwarf2_per_objfile
*dwarf2_per_objfile
5183 = get_dwarf2_per_objfile (objfile
);
5185 /* index_table is NULL if OBJF_READNOW. */
5186 if (!dwarf2_per_objfile
->index_table
)
5189 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5191 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5193 dw2_expand_symtabs_matching_symbol (index
, lookup_name
,
5195 kind
, [&] (offset_type idx
)
5197 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
5198 expansion_notify
, kind
);
5202 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
5205 static struct compunit_symtab
*
5206 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
5211 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
5212 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
5215 if (cust
->includes
== NULL
)
5218 for (i
= 0; cust
->includes
[i
]; ++i
)
5220 struct compunit_symtab
*s
= cust
->includes
[i
];
5222 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
5230 static struct compunit_symtab
*
5231 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
5232 struct bound_minimal_symbol msymbol
,
5234 struct obj_section
*section
,
5237 struct dwarf2_per_cu_data
*data
;
5238 struct compunit_symtab
*result
;
5240 if (!objfile
->psymtabs_addrmap
)
5243 data
= (struct dwarf2_per_cu_data
*) addrmap_find (objfile
->psymtabs_addrmap
,
5248 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
5249 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
5250 paddress (get_objfile_arch (objfile
), pc
));
5253 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
5255 gdb_assert (result
!= NULL
);
5260 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
5261 void *data
, int need_fullname
)
5263 struct dwarf2_per_objfile
*dwarf2_per_objfile
5264 = get_dwarf2_per_objfile (objfile
);
5266 if (!dwarf2_per_objfile
->filenames_cache
)
5268 dwarf2_per_objfile
->filenames_cache
.emplace ();
5270 htab_up
visited (htab_create_alloc (10,
5271 htab_hash_pointer
, htab_eq_pointer
,
5272 NULL
, xcalloc
, xfree
));
5274 /* The rule is CUs specify all the files, including those used
5275 by any TU, so there's no need to scan TUs here. We can
5276 ignore file names coming from already-expanded CUs. */
5278 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5280 if (per_cu
->v
.quick
->compunit_symtab
)
5282 void **slot
= htab_find_slot (visited
.get (),
5283 per_cu
->v
.quick
->file_names
,
5286 *slot
= per_cu
->v
.quick
->file_names
;
5290 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5292 /* We only need to look at symtabs not already expanded. */
5293 if (per_cu
->v
.quick
->compunit_symtab
)
5296 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5297 if (file_data
== NULL
)
5300 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
5303 /* Already visited. */
5308 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5310 const char *filename
= file_data
->file_names
[j
];
5311 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
5316 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
5318 gdb::unique_xmalloc_ptr
<char> this_real_name
;
5321 this_real_name
= gdb_realpath (filename
);
5322 (*fun
) (filename
, this_real_name
.get (), data
);
5327 dw2_has_symbols (struct objfile
*objfile
)
5332 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
5335 dw2_find_last_source_symtab
,
5336 dw2_forget_cached_source_info
,
5337 dw2_map_symtabs_matching_filename
,
5342 dw2_expand_symtabs_for_function
,
5343 dw2_expand_all_symtabs
,
5344 dw2_expand_symtabs_with_fullname
,
5345 dw2_map_matching_symbols
,
5346 dw2_expand_symtabs_matching
,
5347 dw2_find_pc_sect_compunit_symtab
,
5349 dw2_map_symbol_filenames
5352 /* DWARF-5 debug_names reader. */
5354 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
5355 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
5357 /* A helper function that reads the .debug_names section in SECTION
5358 and fills in MAP. FILENAME is the name of the file containing the
5359 section; it is used for error reporting.
5361 Returns true if all went well, false otherwise. */
5364 read_debug_names_from_section (struct objfile
*objfile
,
5365 const char *filename
,
5366 struct dwarf2_section_info
*section
,
5367 mapped_debug_names
&map
)
5369 if (dwarf2_section_empty_p (section
))
5372 /* Older elfutils strip versions could keep the section in the main
5373 executable while splitting it for the separate debug info file. */
5374 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
5377 dwarf2_read_section (objfile
, section
);
5379 map
.dwarf5_byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
5381 const gdb_byte
*addr
= section
->buffer
;
5383 bfd
*const abfd
= get_section_bfd_owner (section
);
5385 unsigned int bytes_read
;
5386 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
5389 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
5390 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
5391 if (bytes_read
+ length
!= section
->size
)
5393 /* There may be multiple per-CU indices. */
5394 warning (_("Section .debug_names in %s length %s does not match "
5395 "section length %s, ignoring .debug_names."),
5396 filename
, plongest (bytes_read
+ length
),
5397 pulongest (section
->size
));
5401 /* The version number. */
5402 uint16_t version
= read_2_bytes (abfd
, addr
);
5406 warning (_("Section .debug_names in %s has unsupported version %d, "
5407 "ignoring .debug_names."),
5413 uint16_t padding
= read_2_bytes (abfd
, addr
);
5417 warning (_("Section .debug_names in %s has unsupported padding %d, "
5418 "ignoring .debug_names."),
5423 /* comp_unit_count - The number of CUs in the CU list. */
5424 map
.cu_count
= read_4_bytes (abfd
, addr
);
5427 /* local_type_unit_count - The number of TUs in the local TU
5429 map
.tu_count
= read_4_bytes (abfd
, addr
);
5432 /* foreign_type_unit_count - The number of TUs in the foreign TU
5434 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
5436 if (foreign_tu_count
!= 0)
5438 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
5439 "ignoring .debug_names."),
5440 filename
, static_cast<unsigned long> (foreign_tu_count
));
5444 /* bucket_count - The number of hash buckets in the hash lookup
5446 map
.bucket_count
= read_4_bytes (abfd
, addr
);
5449 /* name_count - The number of unique names in the index. */
5450 map
.name_count
= read_4_bytes (abfd
, addr
);
5453 /* abbrev_table_size - The size in bytes of the abbreviations
5455 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
5458 /* augmentation_string_size - The size in bytes of the augmentation
5459 string. This value is rounded up to a multiple of 4. */
5460 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
5462 map
.augmentation_is_gdb
= ((augmentation_string_size
5463 == sizeof (dwarf5_augmentation
))
5464 && memcmp (addr
, dwarf5_augmentation
,
5465 sizeof (dwarf5_augmentation
)) == 0);
5466 augmentation_string_size
+= (-augmentation_string_size
) & 3;
5467 addr
+= augmentation_string_size
;
5470 map
.cu_table_reordered
= addr
;
5471 addr
+= map
.cu_count
* map
.offset_size
;
5473 /* List of Local TUs */
5474 map
.tu_table_reordered
= addr
;
5475 addr
+= map
.tu_count
* map
.offset_size
;
5477 /* Hash Lookup Table */
5478 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5479 addr
+= map
.bucket_count
* 4;
5480 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5481 addr
+= map
.name_count
* 4;
5484 map
.name_table_string_offs_reordered
= addr
;
5485 addr
+= map
.name_count
* map
.offset_size
;
5486 map
.name_table_entry_offs_reordered
= addr
;
5487 addr
+= map
.name_count
* map
.offset_size
;
5489 const gdb_byte
*abbrev_table_start
= addr
;
5492 unsigned int bytes_read
;
5493 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5498 const auto insertpair
5499 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5500 if (!insertpair
.second
)
5502 warning (_("Section .debug_names in %s has duplicate index %s, "
5503 "ignoring .debug_names."),
5504 filename
, pulongest (index_num
));
5507 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5508 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5513 mapped_debug_names::index_val::attr attr
;
5514 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5516 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5518 if (attr
.form
== DW_FORM_implicit_const
)
5520 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5524 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5526 indexval
.attr_vec
.push_back (std::move (attr
));
5529 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5531 warning (_("Section .debug_names in %s has abbreviation_table "
5532 "of size %zu vs. written as %u, ignoring .debug_names."),
5533 filename
, addr
- abbrev_table_start
, abbrev_table_size
);
5536 map
.entry_pool
= addr
;
5541 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5545 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5546 const mapped_debug_names
&map
,
5547 dwarf2_section_info
§ion
,
5550 sect_offset sect_off_prev
;
5551 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5553 sect_offset sect_off_next
;
5554 if (i
< map
.cu_count
)
5557 = (sect_offset
) (extract_unsigned_integer
5558 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5560 map
.dwarf5_byte_order
));
5563 sect_off_next
= (sect_offset
) section
.size
;
5566 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5567 dwarf2_per_cu_data
*per_cu
5568 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5569 sect_off_prev
, length
);
5570 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5572 sect_off_prev
= sect_off_next
;
5576 /* Read the CU list from the mapped index, and use it to create all
5577 the CU objects for this dwarf2_per_objfile. */
5580 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5581 const mapped_debug_names
&map
,
5582 const mapped_debug_names
&dwz_map
)
5584 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
5585 dwarf2_per_objfile
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5587 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5588 dwarf2_per_objfile
->info
,
5589 false /* is_dwz */);
5591 if (dwz_map
.cu_count
== 0)
5594 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5595 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5599 /* Read .debug_names. If everything went ok, initialize the "quick"
5600 elements of all the CUs and return true. Otherwise, return false. */
5603 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5605 mapped_debug_names
local_map (dwarf2_per_objfile
);
5606 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5607 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5609 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5610 &dwarf2_per_objfile
->debug_names
,
5614 /* Don't use the index if it's empty. */
5615 if (local_map
.name_count
== 0)
5618 /* If there is a .dwz file, read it so we can get its CU list as
5620 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5623 if (!read_debug_names_from_section (objfile
,
5624 bfd_get_filename (dwz
->dwz_bfd
),
5625 &dwz
->debug_names
, dwz_map
))
5627 warning (_("could not read '.debug_names' section from %s; skipping"),
5628 bfd_get_filename (dwz
->dwz_bfd
));
5633 create_cus_from_debug_names (dwarf2_per_objfile
, local_map
, dwz_map
);
5635 if (local_map
.tu_count
!= 0)
5637 /* We can only handle a single .debug_types when we have an
5639 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
5642 dwarf2_section_info
*section
= VEC_index (dwarf2_section_info_def
,
5643 dwarf2_per_objfile
->types
, 0);
5645 create_signatured_type_table_from_debug_names
5646 (dwarf2_per_objfile
, local_map
, section
, &dwarf2_per_objfile
->abbrev
);
5649 create_addrmap_from_aranges (dwarf2_per_objfile
,
5650 &dwarf2_per_objfile
->debug_aranges
);
5652 dwarf2_per_objfile
->debug_names_table
.reset
5653 (new mapped_debug_names (dwarf2_per_objfile
));
5654 *dwarf2_per_objfile
->debug_names_table
= std::move (local_map
);
5655 dwarf2_per_objfile
->using_index
= 1;
5656 dwarf2_per_objfile
->quick_file_names_table
=
5657 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
5662 /* Type used to manage iterating over all CUs looking for a symbol for
5665 class dw2_debug_names_iterator
5668 /* If WANT_SPECIFIC_BLOCK is true, only look for symbols in block
5669 BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
5670 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5671 bool want_specific_block
,
5672 block_enum block_index
, domain_enum domain
,
5674 : m_map (map
), m_want_specific_block (want_specific_block
),
5675 m_block_index (block_index
), m_domain (domain
),
5676 m_addr (find_vec_in_debug_names (map
, name
))
5679 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5680 search_domain search
, uint32_t namei
)
5683 m_addr (find_vec_in_debug_names (map
, namei
))
5686 /* Return the next matching CU or NULL if there are no more. */
5687 dwarf2_per_cu_data
*next ();
5690 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5692 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5695 /* The internalized form of .debug_names. */
5696 const mapped_debug_names
&m_map
;
5698 /* If true, only look for symbols that match BLOCK_INDEX. */
5699 const bool m_want_specific_block
= false;
5701 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
5702 Unused if !WANT_SPECIFIC_BLOCK - FIRST_LOCAL_BLOCK is an invalid
5704 const block_enum m_block_index
= FIRST_LOCAL_BLOCK
;
5706 /* The kind of symbol we're looking for. */
5707 const domain_enum m_domain
= UNDEF_DOMAIN
;
5708 const search_domain m_search
= ALL_DOMAIN
;
5710 /* The list of CUs from the index entry of the symbol, or NULL if
5712 const gdb_byte
*m_addr
;
5716 mapped_debug_names::namei_to_name (uint32_t namei
) const
5718 const ULONGEST namei_string_offs
5719 = extract_unsigned_integer ((name_table_string_offs_reordered
5720 + namei
* offset_size
),
5723 return read_indirect_string_at_offset
5724 (dwarf2_per_objfile
, dwarf2_per_objfile
->objfile
->obfd
, namei_string_offs
);
5727 /* Find a slot in .debug_names for the object named NAME. If NAME is
5728 found, return pointer to its pool data. If NAME cannot be found,
5732 dw2_debug_names_iterator::find_vec_in_debug_names
5733 (const mapped_debug_names
&map
, const char *name
)
5735 int (*cmp
) (const char *, const char *);
5737 if (current_language
->la_language
== language_cplus
5738 || current_language
->la_language
== language_fortran
5739 || current_language
->la_language
== language_d
)
5741 /* NAME is already canonical. Drop any qualifiers as
5742 .debug_names does not contain any. */
5744 if (strchr (name
, '(') != NULL
)
5746 gdb::unique_xmalloc_ptr
<char> without_params
5747 = cp_remove_params (name
);
5749 if (without_params
!= NULL
)
5751 name
= without_params
.get();
5756 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5758 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5760 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5761 (map
.bucket_table_reordered
5762 + (full_hash
% map
.bucket_count
)), 4,
5763 map
.dwarf5_byte_order
);
5767 if (namei
>= map
.name_count
)
5769 complaint (&symfile_complaints
,
5770 _("Wrong .debug_names with name index %u but name_count=%u "
5772 namei
, map
.name_count
,
5773 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5779 const uint32_t namei_full_hash
5780 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5781 (map
.hash_table_reordered
+ namei
), 4,
5782 map
.dwarf5_byte_order
);
5783 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5786 if (full_hash
== namei_full_hash
)
5788 const char *const namei_string
= map
.namei_to_name (namei
);
5790 #if 0 /* An expensive sanity check. */
5791 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5793 complaint (&symfile_complaints
,
5794 _("Wrong .debug_names hash for string at index %u "
5796 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5801 if (cmp (namei_string
, name
) == 0)
5803 const ULONGEST namei_entry_offs
5804 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5805 + namei
* map
.offset_size
),
5806 map
.offset_size
, map
.dwarf5_byte_order
);
5807 return map
.entry_pool
+ namei_entry_offs
;
5812 if (namei
>= map
.name_count
)
5818 dw2_debug_names_iterator::find_vec_in_debug_names
5819 (const mapped_debug_names
&map
, uint32_t namei
)
5821 if (namei
>= map
.name_count
)
5823 complaint (&symfile_complaints
,
5824 _("Wrong .debug_names with name index %u but name_count=%u "
5826 namei
, map
.name_count
,
5827 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5831 const ULONGEST namei_entry_offs
5832 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5833 + namei
* map
.offset_size
),
5834 map
.offset_size
, map
.dwarf5_byte_order
);
5835 return map
.entry_pool
+ namei_entry_offs
;
5838 /* See dw2_debug_names_iterator. */
5840 dwarf2_per_cu_data
*
5841 dw2_debug_names_iterator::next ()
5846 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5847 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5848 bfd
*const abfd
= objfile
->obfd
;
5852 unsigned int bytes_read
;
5853 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5854 m_addr
+= bytes_read
;
5858 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5859 if (indexval_it
== m_map
.abbrev_map
.cend ())
5861 complaint (&symfile_complaints
,
5862 _("Wrong .debug_names undefined abbrev code %s "
5864 pulongest (abbrev
), objfile_name (objfile
));
5867 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5868 bool have_is_static
= false;
5870 dwarf2_per_cu_data
*per_cu
= NULL
;
5871 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5876 case DW_FORM_implicit_const
:
5877 ull
= attr
.implicit_const
;
5879 case DW_FORM_flag_present
:
5883 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5884 m_addr
+= bytes_read
;
5887 complaint (&symfile_complaints
,
5888 _("Unsupported .debug_names form %s [in module %s]"),
5889 dwarf_form_name (attr
.form
),
5890 objfile_name (objfile
));
5893 switch (attr
.dw_idx
)
5895 case DW_IDX_compile_unit
:
5896 /* Don't crash on bad data. */
5897 if (ull
>= dwarf2_per_objfile
->all_comp_units
.size ())
5899 complaint (&symfile_complaints
,
5900 _(".debug_names entry has bad CU index %s"
5903 objfile_name (dwarf2_per_objfile
->objfile
));
5906 per_cu
= dwarf2_per_objfile
->get_cutu (ull
);
5908 case DW_IDX_type_unit
:
5909 /* Don't crash on bad data. */
5910 if (ull
>= dwarf2_per_objfile
->all_type_units
.size ())
5912 complaint (&symfile_complaints
,
5913 _(".debug_names entry has bad TU index %s"
5916 objfile_name (dwarf2_per_objfile
->objfile
));
5919 per_cu
= &dwarf2_per_objfile
->get_tu (ull
)->per_cu
;
5921 case DW_IDX_GNU_internal
:
5922 if (!m_map
.augmentation_is_gdb
)
5924 have_is_static
= true;
5927 case DW_IDX_GNU_external
:
5928 if (!m_map
.augmentation_is_gdb
)
5930 have_is_static
= true;
5936 /* Skip if already read in. */
5937 if (per_cu
->v
.quick
->compunit_symtab
)
5940 /* Check static vs global. */
5943 const bool want_static
= m_block_index
!= GLOBAL_BLOCK
;
5944 if (m_want_specific_block
&& want_static
!= is_static
)
5948 /* Match dw2_symtab_iter_next, symbol_kind
5949 and debug_names::psymbol_tag. */
5953 switch (indexval
.dwarf_tag
)
5955 case DW_TAG_variable
:
5956 case DW_TAG_subprogram
:
5957 /* Some types are also in VAR_DOMAIN. */
5958 case DW_TAG_typedef
:
5959 case DW_TAG_structure_type
:
5966 switch (indexval
.dwarf_tag
)
5968 case DW_TAG_typedef
:
5969 case DW_TAG_structure_type
:
5976 switch (indexval
.dwarf_tag
)
5979 case DW_TAG_variable
:
5989 /* Match dw2_expand_symtabs_matching, symbol_kind and
5990 debug_names::psymbol_tag. */
5993 case VARIABLES_DOMAIN
:
5994 switch (indexval
.dwarf_tag
)
5996 case DW_TAG_variable
:
6002 case FUNCTIONS_DOMAIN
:
6003 switch (indexval
.dwarf_tag
)
6005 case DW_TAG_subprogram
:
6012 switch (indexval
.dwarf_tag
)
6014 case DW_TAG_typedef
:
6015 case DW_TAG_structure_type
:
6028 static struct compunit_symtab
*
6029 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, int block_index_int
,
6030 const char *name
, domain_enum domain
)
6032 const block_enum block_index
= static_cast<block_enum
> (block_index_int
);
6033 struct dwarf2_per_objfile
*dwarf2_per_objfile
6034 = get_dwarf2_per_objfile (objfile
);
6036 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
6039 /* index is NULL if OBJF_READNOW. */
6042 const auto &map
= *mapp
;
6044 dw2_debug_names_iterator
iter (map
, true /* want_specific_block */,
6045 block_index
, domain
, name
);
6047 struct compunit_symtab
*stab_best
= NULL
;
6048 struct dwarf2_per_cu_data
*per_cu
;
6049 while ((per_cu
= iter
.next ()) != NULL
)
6051 struct symbol
*sym
, *with_opaque
= NULL
;
6052 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
6053 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
6054 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
6056 sym
= block_find_symbol (block
, name
, domain
,
6057 block_find_non_opaque_type_preferred
,
6060 /* Some caution must be observed with overloaded functions and
6061 methods, since the index will not contain any overload
6062 information (but NAME might contain it). */
6065 && strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
6067 if (with_opaque
!= NULL
6068 && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque
), name
) == 0)
6071 /* Keep looking through other CUs. */
6077 /* This dumps minimal information about .debug_names. It is called
6078 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
6079 uses this to verify that .debug_names has been loaded. */
6082 dw2_debug_names_dump (struct objfile
*objfile
)
6084 struct dwarf2_per_objfile
*dwarf2_per_objfile
6085 = get_dwarf2_per_objfile (objfile
);
6087 gdb_assert (dwarf2_per_objfile
->using_index
);
6088 printf_filtered (".debug_names:");
6089 if (dwarf2_per_objfile
->debug_names_table
)
6090 printf_filtered (" exists\n");
6092 printf_filtered (" faked for \"readnow\"\n");
6093 printf_filtered ("\n");
6097 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
6098 const char *func_name
)
6100 struct dwarf2_per_objfile
*dwarf2_per_objfile
6101 = get_dwarf2_per_objfile (objfile
);
6103 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
6104 if (dwarf2_per_objfile
->debug_names_table
)
6106 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6108 /* Note: It doesn't matter what we pass for block_index here. */
6109 dw2_debug_names_iterator
iter (map
, false /* want_specific_block */,
6110 GLOBAL_BLOCK
, VAR_DOMAIN
, func_name
);
6112 struct dwarf2_per_cu_data
*per_cu
;
6113 while ((per_cu
= iter
.next ()) != NULL
)
6114 dw2_instantiate_symtab (per_cu
);
6119 dw2_debug_names_expand_symtabs_matching
6120 (struct objfile
*objfile
,
6121 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
6122 const lookup_name_info
&lookup_name
,
6123 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
6124 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
6125 enum search_domain kind
)
6127 struct dwarf2_per_objfile
*dwarf2_per_objfile
6128 = get_dwarf2_per_objfile (objfile
);
6130 /* debug_names_table is NULL if OBJF_READNOW. */
6131 if (!dwarf2_per_objfile
->debug_names_table
)
6134 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
6136 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6138 dw2_expand_symtabs_matching_symbol (map
, lookup_name
,
6140 kind
, [&] (offset_type namei
)
6142 /* The name was matched, now expand corresponding CUs that were
6144 dw2_debug_names_iterator
iter (map
, kind
, namei
);
6146 struct dwarf2_per_cu_data
*per_cu
;
6147 while ((per_cu
= iter
.next ()) != NULL
)
6148 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
6153 const struct quick_symbol_functions dwarf2_debug_names_functions
=
6156 dw2_find_last_source_symtab
,
6157 dw2_forget_cached_source_info
,
6158 dw2_map_symtabs_matching_filename
,
6159 dw2_debug_names_lookup_symbol
,
6161 dw2_debug_names_dump
,
6163 dw2_debug_names_expand_symtabs_for_function
,
6164 dw2_expand_all_symtabs
,
6165 dw2_expand_symtabs_with_fullname
,
6166 dw2_map_matching_symbols
,
6167 dw2_debug_names_expand_symtabs_matching
,
6168 dw2_find_pc_sect_compunit_symtab
,
6170 dw2_map_symbol_filenames
6173 /* See symfile.h. */
6176 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
6178 struct dwarf2_per_objfile
*dwarf2_per_objfile
6179 = get_dwarf2_per_objfile (objfile
);
6181 /* If we're about to read full symbols, don't bother with the
6182 indices. In this case we also don't care if some other debug
6183 format is making psymtabs, because they are all about to be
6185 if ((objfile
->flags
& OBJF_READNOW
))
6187 dwarf2_per_objfile
->using_index
= 1;
6188 create_all_comp_units (dwarf2_per_objfile
);
6189 create_all_type_units (dwarf2_per_objfile
);
6190 dwarf2_per_objfile
->quick_file_names_table
6191 = create_quick_file_names_table
6192 (dwarf2_per_objfile
->all_comp_units
.size ());
6194 for (int i
= 0; i
< (dwarf2_per_objfile
->all_comp_units
.size ()
6195 + dwarf2_per_objfile
->all_type_units
.size ()); ++i
)
6197 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
6199 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6200 struct dwarf2_per_cu_quick_data
);
6203 /* Return 1 so that gdb sees the "quick" functions. However,
6204 these functions will be no-ops because we will have expanded
6206 *index_kind
= dw_index_kind::GDB_INDEX
;
6210 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
6212 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6216 if (dwarf2_read_index (dwarf2_per_objfile
))
6218 *index_kind
= dw_index_kind::GDB_INDEX
;
6227 /* Build a partial symbol table. */
6230 dwarf2_build_psymtabs (struct objfile
*objfile
)
6232 struct dwarf2_per_objfile
*dwarf2_per_objfile
6233 = get_dwarf2_per_objfile (objfile
);
6235 if (objfile
->global_psymbols
.capacity () == 0
6236 && objfile
->static_psymbols
.capacity () == 0)
6237 init_psymbol_list (objfile
, 1024);
6241 /* This isn't really ideal: all the data we allocate on the
6242 objfile's obstack is still uselessly kept around. However,
6243 freeing it seems unsafe. */
6244 psymtab_discarder
psymtabs (objfile
);
6245 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
6248 CATCH (except
, RETURN_MASK_ERROR
)
6250 exception_print (gdb_stderr
, except
);
6255 /* Return the total length of the CU described by HEADER. */
6258 get_cu_length (const struct comp_unit_head
*header
)
6260 return header
->initial_length_size
+ header
->length
;
6263 /* Return TRUE if SECT_OFF is within CU_HEADER. */
6266 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
6268 sect_offset bottom
= cu_header
->sect_off
;
6269 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
6271 return sect_off
>= bottom
&& sect_off
< top
;
6274 /* Find the base address of the compilation unit for range lists and
6275 location lists. It will normally be specified by DW_AT_low_pc.
6276 In DWARF-3 draft 4, the base address could be overridden by
6277 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6278 compilation units with discontinuous ranges. */
6281 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6283 struct attribute
*attr
;
6286 cu
->base_address
= 0;
6288 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6291 cu
->base_address
= attr_value_as_address (attr
);
6296 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6299 cu
->base_address
= attr_value_as_address (attr
);
6305 /* Read in the comp unit header information from the debug_info at info_ptr.
6306 Use rcuh_kind::COMPILE as the default type if not known by the caller.
6307 NOTE: This leaves members offset, first_die_offset to be filled in
6310 static const gdb_byte
*
6311 read_comp_unit_head (struct comp_unit_head
*cu_header
,
6312 const gdb_byte
*info_ptr
,
6313 struct dwarf2_section_info
*section
,
6314 rcuh_kind section_kind
)
6317 unsigned int bytes_read
;
6318 const char *filename
= get_section_file_name (section
);
6319 bfd
*abfd
= get_section_bfd_owner (section
);
6321 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
6322 cu_header
->initial_length_size
= bytes_read
;
6323 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
6324 info_ptr
+= bytes_read
;
6325 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
6327 if (cu_header
->version
< 5)
6328 switch (section_kind
)
6330 case rcuh_kind::COMPILE
:
6331 cu_header
->unit_type
= DW_UT_compile
;
6333 case rcuh_kind::TYPE
:
6334 cu_header
->unit_type
= DW_UT_type
;
6337 internal_error (__FILE__
, __LINE__
,
6338 _("read_comp_unit_head: invalid section_kind"));
6342 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
6343 (read_1_byte (abfd
, info_ptr
));
6345 switch (cu_header
->unit_type
)
6348 if (section_kind
!= rcuh_kind::COMPILE
)
6349 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6350 "(is DW_UT_compile, should be DW_UT_type) [in module %s]"),
6354 section_kind
= rcuh_kind::TYPE
;
6357 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6358 "(is %d, should be %d or %d) [in module %s]"),
6359 cu_header
->unit_type
, DW_UT_compile
, DW_UT_type
, filename
);
6362 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6365 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
6368 info_ptr
+= bytes_read
;
6369 if (cu_header
->version
< 5)
6371 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6374 signed_addr
= bfd_get_sign_extend_vma (abfd
);
6375 if (signed_addr
< 0)
6376 internal_error (__FILE__
, __LINE__
,
6377 _("read_comp_unit_head: dwarf from non elf file"));
6378 cu_header
->signed_addr_p
= signed_addr
;
6380 if (section_kind
== rcuh_kind::TYPE
)
6382 LONGEST type_offset
;
6384 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
6387 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
6388 info_ptr
+= bytes_read
;
6389 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
6390 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
6391 error (_("Dwarf Error: Too big type_offset in compilation unit "
6392 "header (is %s) [in module %s]"), plongest (type_offset
),
6399 /* Helper function that returns the proper abbrev section for
6402 static struct dwarf2_section_info
*
6403 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6405 struct dwarf2_section_info
*abbrev
;
6406 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6408 if (this_cu
->is_dwz
)
6409 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
6411 abbrev
= &dwarf2_per_objfile
->abbrev
;
6416 /* Subroutine of read_and_check_comp_unit_head and
6417 read_and_check_type_unit_head to simplify them.
6418 Perform various error checking on the header. */
6421 error_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6422 struct comp_unit_head
*header
,
6423 struct dwarf2_section_info
*section
,
6424 struct dwarf2_section_info
*abbrev_section
)
6426 const char *filename
= get_section_file_name (section
);
6428 if (header
->version
< 2 || header
->version
> 5)
6429 error (_("Dwarf Error: wrong version in compilation unit header "
6430 "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header
->version
,
6433 if (to_underlying (header
->abbrev_sect_off
)
6434 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
6435 error (_("Dwarf Error: bad offset (%s) in compilation unit header "
6436 "(offset %s + 6) [in module %s]"),
6437 sect_offset_str (header
->abbrev_sect_off
),
6438 sect_offset_str (header
->sect_off
),
6441 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
6442 avoid potential 32-bit overflow. */
6443 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
6445 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
6446 "(offset %s + 0) [in module %s]"),
6447 header
->length
, sect_offset_str (header
->sect_off
),
6451 /* Read in a CU/TU header and perform some basic error checking.
6452 The contents of the header are stored in HEADER.
6453 The result is a pointer to the start of the first DIE. */
6455 static const gdb_byte
*
6456 read_and_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6457 struct comp_unit_head
*header
,
6458 struct dwarf2_section_info
*section
,
6459 struct dwarf2_section_info
*abbrev_section
,
6460 const gdb_byte
*info_ptr
,
6461 rcuh_kind section_kind
)
6463 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
6465 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
6467 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
6469 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
6471 error_check_comp_unit_head (dwarf2_per_objfile
, header
, section
,
6477 /* Fetch the abbreviation table offset from a comp or type unit header. */
6480 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6481 struct dwarf2_section_info
*section
,
6482 sect_offset sect_off
)
6484 bfd
*abfd
= get_section_bfd_owner (section
);
6485 const gdb_byte
*info_ptr
;
6486 unsigned int initial_length_size
, offset_size
;
6489 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
6490 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6491 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6492 offset_size
= initial_length_size
== 4 ? 4 : 8;
6493 info_ptr
+= initial_length_size
;
6495 version
= read_2_bytes (abfd
, info_ptr
);
6499 /* Skip unit type and address size. */
6503 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
6506 /* Allocate a new partial symtab for file named NAME and mark this new
6507 partial symtab as being an include of PST. */
6510 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
6511 struct objfile
*objfile
)
6513 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
6515 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6517 /* It shares objfile->objfile_obstack. */
6518 subpst
->dirname
= pst
->dirname
;
6521 subpst
->textlow
= 0;
6522 subpst
->texthigh
= 0;
6524 subpst
->dependencies
6525 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
6526 subpst
->dependencies
[0] = pst
;
6527 subpst
->number_of_dependencies
= 1;
6529 subpst
->globals_offset
= 0;
6530 subpst
->n_global_syms
= 0;
6531 subpst
->statics_offset
= 0;
6532 subpst
->n_static_syms
= 0;
6533 subpst
->compunit_symtab
= NULL
;
6534 subpst
->read_symtab
= pst
->read_symtab
;
6537 /* No private part is necessary for include psymtabs. This property
6538 can be used to differentiate between such include psymtabs and
6539 the regular ones. */
6540 subpst
->read_symtab_private
= NULL
;
6543 /* Read the Line Number Program data and extract the list of files
6544 included by the source file represented by PST. Build an include
6545 partial symtab for each of these included files. */
6548 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6549 struct die_info
*die
,
6550 struct partial_symtab
*pst
)
6553 struct attribute
*attr
;
6555 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6557 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6559 return; /* No linetable, so no includes. */
6561 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
6562 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
6566 hash_signatured_type (const void *item
)
6568 const struct signatured_type
*sig_type
6569 = (const struct signatured_type
*) item
;
6571 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6572 return sig_type
->signature
;
6576 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6578 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6579 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6581 return lhs
->signature
== rhs
->signature
;
6584 /* Allocate a hash table for signatured types. */
6587 allocate_signatured_type_table (struct objfile
*objfile
)
6589 return htab_create_alloc_ex (41,
6590 hash_signatured_type
,
6593 &objfile
->objfile_obstack
,
6594 hashtab_obstack_allocate
,
6595 dummy_obstack_deallocate
);
6598 /* A helper function to add a signatured type CU to a table. */
6601 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6603 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6604 std::vector
<signatured_type
*> *all_type_units
6605 = (std::vector
<signatured_type
*> *) datum
;
6607 all_type_units
->push_back (sigt
);
6612 /* A helper for create_debug_types_hash_table. Read types from SECTION
6613 and fill them into TYPES_HTAB. It will process only type units,
6614 therefore DW_UT_type. */
6617 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6618 struct dwo_file
*dwo_file
,
6619 dwarf2_section_info
*section
, htab_t
&types_htab
,
6620 rcuh_kind section_kind
)
6622 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6623 struct dwarf2_section_info
*abbrev_section
;
6625 const gdb_byte
*info_ptr
, *end_ptr
;
6627 abbrev_section
= (dwo_file
!= NULL
6628 ? &dwo_file
->sections
.abbrev
6629 : &dwarf2_per_objfile
->abbrev
);
6631 if (dwarf_read_debug
)
6632 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6633 get_section_name (section
),
6634 get_section_file_name (abbrev_section
));
6636 dwarf2_read_section (objfile
, section
);
6637 info_ptr
= section
->buffer
;
6639 if (info_ptr
== NULL
)
6642 /* We can't set abfd until now because the section may be empty or
6643 not present, in which case the bfd is unknown. */
6644 abfd
= get_section_bfd_owner (section
);
6646 /* We don't use init_cutu_and_read_dies_simple, or some such, here
6647 because we don't need to read any dies: the signature is in the
6650 end_ptr
= info_ptr
+ section
->size
;
6651 while (info_ptr
< end_ptr
)
6653 struct signatured_type
*sig_type
;
6654 struct dwo_unit
*dwo_tu
;
6656 const gdb_byte
*ptr
= info_ptr
;
6657 struct comp_unit_head header
;
6658 unsigned int length
;
6660 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6662 /* Initialize it due to a false compiler warning. */
6663 header
.signature
= -1;
6664 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6666 /* We need to read the type's signature in order to build the hash
6667 table, but we don't need anything else just yet. */
6669 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6670 abbrev_section
, ptr
, section_kind
);
6672 length
= get_cu_length (&header
);
6674 /* Skip dummy type units. */
6675 if (ptr
>= info_ptr
+ length
6676 || peek_abbrev_code (abfd
, ptr
) == 0
6677 || header
.unit_type
!= DW_UT_type
)
6683 if (types_htab
== NULL
)
6686 types_htab
= allocate_dwo_unit_table (objfile
);
6688 types_htab
= allocate_signatured_type_table (objfile
);
6694 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6696 dwo_tu
->dwo_file
= dwo_file
;
6697 dwo_tu
->signature
= header
.signature
;
6698 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6699 dwo_tu
->section
= section
;
6700 dwo_tu
->sect_off
= sect_off
;
6701 dwo_tu
->length
= length
;
6705 /* N.B.: type_offset is not usable if this type uses a DWO file.
6706 The real type_offset is in the DWO file. */
6708 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6709 struct signatured_type
);
6710 sig_type
->signature
= header
.signature
;
6711 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6712 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6713 sig_type
->per_cu
.is_debug_types
= 1;
6714 sig_type
->per_cu
.section
= section
;
6715 sig_type
->per_cu
.sect_off
= sect_off
;
6716 sig_type
->per_cu
.length
= length
;
6719 slot
= htab_find_slot (types_htab
,
6720 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6722 gdb_assert (slot
!= NULL
);
6725 sect_offset dup_sect_off
;
6729 const struct dwo_unit
*dup_tu
6730 = (const struct dwo_unit
*) *slot
;
6732 dup_sect_off
= dup_tu
->sect_off
;
6736 const struct signatured_type
*dup_tu
6737 = (const struct signatured_type
*) *slot
;
6739 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6742 complaint (&symfile_complaints
,
6743 _("debug type entry at offset %s is duplicate to"
6744 " the entry at offset %s, signature %s"),
6745 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6746 hex_string (header
.signature
));
6748 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6750 if (dwarf_read_debug
> 1)
6751 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6752 sect_offset_str (sect_off
),
6753 hex_string (header
.signature
));
6759 /* Create the hash table of all entries in the .debug_types
6760 (or .debug_types.dwo) section(s).
6761 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6762 otherwise it is NULL.
6764 The result is a pointer to the hash table or NULL if there are no types.
6766 Note: This function processes DWO files only, not DWP files. */
6769 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6770 struct dwo_file
*dwo_file
,
6771 VEC (dwarf2_section_info_def
) *types
,
6775 struct dwarf2_section_info
*section
;
6777 if (VEC_empty (dwarf2_section_info_def
, types
))
6781 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
6783 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, section
,
6784 types_htab
, rcuh_kind::TYPE
);
6787 /* Create the hash table of all entries in the .debug_types section,
6788 and initialize all_type_units.
6789 The result is zero if there is an error (e.g. missing .debug_types section),
6790 otherwise non-zero. */
6793 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6795 htab_t types_htab
= NULL
;
6797 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6798 &dwarf2_per_objfile
->info
, types_htab
,
6799 rcuh_kind::COMPILE
);
6800 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6801 dwarf2_per_objfile
->types
, types_htab
);
6802 if (types_htab
== NULL
)
6804 dwarf2_per_objfile
->signatured_types
= NULL
;
6808 dwarf2_per_objfile
->signatured_types
= types_htab
;
6810 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
6811 dwarf2_per_objfile
->all_type_units
.reserve (htab_elements (types_htab
));
6813 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
,
6814 &dwarf2_per_objfile
->all_type_units
);
6819 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6820 If SLOT is non-NULL, it is the entry to use in the hash table.
6821 Otherwise we find one. */
6823 static struct signatured_type
*
6824 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6827 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6829 if (dwarf2_per_objfile
->all_type_units
.size ()
6830 == dwarf2_per_objfile
->all_type_units
.capacity ())
6831 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6833 signatured_type
*sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6834 struct signatured_type
);
6836 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
6837 sig_type
->signature
= sig
;
6838 sig_type
->per_cu
.is_debug_types
= 1;
6839 if (dwarf2_per_objfile
->using_index
)
6841 sig_type
->per_cu
.v
.quick
=
6842 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6843 struct dwarf2_per_cu_quick_data
);
6848 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6851 gdb_assert (*slot
== NULL
);
6853 /* The rest of sig_type must be filled in by the caller. */
6857 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6858 Fill in SIG_ENTRY with DWO_ENTRY. */
6861 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6862 struct signatured_type
*sig_entry
,
6863 struct dwo_unit
*dwo_entry
)
6865 /* Make sure we're not clobbering something we don't expect to. */
6866 gdb_assert (! sig_entry
->per_cu
.queued
);
6867 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6868 if (dwarf2_per_objfile
->using_index
)
6870 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6871 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6874 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6875 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6876 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6877 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6878 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6880 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6881 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6882 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6883 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6884 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6885 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6886 sig_entry
->dwo_unit
= dwo_entry
;
6889 /* Subroutine of lookup_signatured_type.
6890 If we haven't read the TU yet, create the signatured_type data structure
6891 for a TU to be read in directly from a DWO file, bypassing the stub.
6892 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6893 using .gdb_index, then when reading a CU we want to stay in the DWO file
6894 containing that CU. Otherwise we could end up reading several other DWO
6895 files (due to comdat folding) to process the transitive closure of all the
6896 mentioned TUs, and that can be slow. The current DWO file will have every
6897 type signature that it needs.
6898 We only do this for .gdb_index because in the psymtab case we already have
6899 to read all the DWOs to build the type unit groups. */
6901 static struct signatured_type
*
6902 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6904 struct dwarf2_per_objfile
*dwarf2_per_objfile
6905 = cu
->per_cu
->dwarf2_per_objfile
;
6906 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6907 struct dwo_file
*dwo_file
;
6908 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6909 struct signatured_type find_sig_entry
, *sig_entry
;
6912 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6914 /* If TU skeletons have been removed then we may not have read in any
6916 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6918 dwarf2_per_objfile
->signatured_types
6919 = allocate_signatured_type_table (objfile
);
6922 /* We only ever need to read in one copy of a signatured type.
6923 Use the global signatured_types array to do our own comdat-folding
6924 of types. If this is the first time we're reading this TU, and
6925 the TU has an entry in .gdb_index, replace the recorded data from
6926 .gdb_index with this TU. */
6928 find_sig_entry
.signature
= sig
;
6929 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6930 &find_sig_entry
, INSERT
);
6931 sig_entry
= (struct signatured_type
*) *slot
;
6933 /* We can get here with the TU already read, *or* in the process of being
6934 read. Don't reassign the global entry to point to this DWO if that's
6935 the case. Also note that if the TU is already being read, it may not
6936 have come from a DWO, the program may be a mix of Fission-compiled
6937 code and non-Fission-compiled code. */
6939 /* Have we already tried to read this TU?
6940 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6941 needn't exist in the global table yet). */
6942 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6945 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6946 dwo_unit of the TU itself. */
6947 dwo_file
= cu
->dwo_unit
->dwo_file
;
6949 /* Ok, this is the first time we're reading this TU. */
6950 if (dwo_file
->tus
== NULL
)
6952 find_dwo_entry
.signature
= sig
;
6953 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
6954 if (dwo_entry
== NULL
)
6957 /* If the global table doesn't have an entry for this TU, add one. */
6958 if (sig_entry
== NULL
)
6959 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6961 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6962 sig_entry
->per_cu
.tu_read
= 1;
6966 /* Subroutine of lookup_signatured_type.
6967 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6968 then try the DWP file. If the TU stub (skeleton) has been removed then
6969 it won't be in .gdb_index. */
6971 static struct signatured_type
*
6972 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6974 struct dwarf2_per_objfile
*dwarf2_per_objfile
6975 = cu
->per_cu
->dwarf2_per_objfile
;
6976 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6977 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
6978 struct dwo_unit
*dwo_entry
;
6979 struct signatured_type find_sig_entry
, *sig_entry
;
6982 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6983 gdb_assert (dwp_file
!= NULL
);
6985 /* If TU skeletons have been removed then we may not have read in any
6987 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6989 dwarf2_per_objfile
->signatured_types
6990 = allocate_signatured_type_table (objfile
);
6993 find_sig_entry
.signature
= sig
;
6994 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6995 &find_sig_entry
, INSERT
);
6996 sig_entry
= (struct signatured_type
*) *slot
;
6998 /* Have we already tried to read this TU?
6999 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
7000 needn't exist in the global table yet). */
7001 if (sig_entry
!= NULL
)
7004 if (dwp_file
->tus
== NULL
)
7006 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
7007 sig
, 1 /* is_debug_types */);
7008 if (dwo_entry
== NULL
)
7011 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
7012 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7017 /* Lookup a signature based type for DW_FORM_ref_sig8.
7018 Returns NULL if signature SIG is not present in the table.
7019 It is up to the caller to complain about this. */
7021 static struct signatured_type
*
7022 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7024 struct dwarf2_per_objfile
*dwarf2_per_objfile
7025 = cu
->per_cu
->dwarf2_per_objfile
;
7028 && dwarf2_per_objfile
->using_index
)
7030 /* We're in a DWO/DWP file, and we're using .gdb_index.
7031 These cases require special processing. */
7032 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
7033 return lookup_dwo_signatured_type (cu
, sig
);
7035 return lookup_dwp_signatured_type (cu
, sig
);
7039 struct signatured_type find_entry
, *entry
;
7041 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7043 find_entry
.signature
= sig
;
7044 entry
= ((struct signatured_type
*)
7045 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
7050 /* Low level DIE reading support. */
7052 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
7055 init_cu_die_reader (struct die_reader_specs
*reader
,
7056 struct dwarf2_cu
*cu
,
7057 struct dwarf2_section_info
*section
,
7058 struct dwo_file
*dwo_file
,
7059 struct abbrev_table
*abbrev_table
)
7061 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
7062 reader
->abfd
= get_section_bfd_owner (section
);
7064 reader
->dwo_file
= dwo_file
;
7065 reader
->die_section
= section
;
7066 reader
->buffer
= section
->buffer
;
7067 reader
->buffer_end
= section
->buffer
+ section
->size
;
7068 reader
->comp_dir
= NULL
;
7069 reader
->abbrev_table
= abbrev_table
;
7072 /* Subroutine of init_cutu_and_read_dies to simplify it.
7073 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
7074 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
7077 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
7078 from it to the DIE in the DWO. If NULL we are skipping the stub.
7079 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
7080 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
7081 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
7082 STUB_COMP_DIR may be non-NULL.
7083 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
7084 are filled in with the info of the DIE from the DWO file.
7085 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
7086 from the dwo. Since *RESULT_READER references this abbrev table, it must be
7087 kept around for at least as long as *RESULT_READER.
7089 The result is non-zero if a valid (non-dummy) DIE was found. */
7092 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
7093 struct dwo_unit
*dwo_unit
,
7094 struct die_info
*stub_comp_unit_die
,
7095 const char *stub_comp_dir
,
7096 struct die_reader_specs
*result_reader
,
7097 const gdb_byte
**result_info_ptr
,
7098 struct die_info
**result_comp_unit_die
,
7099 int *result_has_children
,
7100 abbrev_table_up
*result_dwo_abbrev_table
)
7102 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7103 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7104 struct dwarf2_cu
*cu
= this_cu
->cu
;
7106 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7107 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
7108 int i
,num_extra_attrs
;
7109 struct dwarf2_section_info
*dwo_abbrev_section
;
7110 struct attribute
*attr
;
7111 struct die_info
*comp_unit_die
;
7113 /* At most one of these may be provided. */
7114 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
7116 /* These attributes aren't processed until later:
7117 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
7118 DW_AT_comp_dir is used now, to find the DWO file, but it is also
7119 referenced later. However, these attributes are found in the stub
7120 which we won't have later. In order to not impose this complication
7121 on the rest of the code, we read them here and copy them to the
7130 if (stub_comp_unit_die
!= NULL
)
7132 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
7134 if (! this_cu
->is_debug_types
)
7135 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
7136 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
7137 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
7138 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
7139 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
7141 /* There should be a DW_AT_addr_base attribute here (if needed).
7142 We need the value before we can process DW_FORM_GNU_addr_index. */
7144 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
7146 cu
->addr_base
= DW_UNSND (attr
);
7148 /* There should be a DW_AT_ranges_base attribute here (if needed).
7149 We need the value before we can process DW_AT_ranges. */
7150 cu
->ranges_base
= 0;
7151 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
7153 cu
->ranges_base
= DW_UNSND (attr
);
7155 else if (stub_comp_dir
!= NULL
)
7157 /* Reconstruct the comp_dir attribute to simplify the code below. */
7158 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
7159 comp_dir
->name
= DW_AT_comp_dir
;
7160 comp_dir
->form
= DW_FORM_string
;
7161 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
7162 DW_STRING (comp_dir
) = stub_comp_dir
;
7165 /* Set up for reading the DWO CU/TU. */
7166 cu
->dwo_unit
= dwo_unit
;
7167 dwarf2_section_info
*section
= dwo_unit
->section
;
7168 dwarf2_read_section (objfile
, section
);
7169 abfd
= get_section_bfd_owner (section
);
7170 begin_info_ptr
= info_ptr
= (section
->buffer
7171 + to_underlying (dwo_unit
->sect_off
));
7172 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
7174 if (this_cu
->is_debug_types
)
7176 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
7178 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7179 &cu
->header
, section
,
7181 info_ptr
, rcuh_kind::TYPE
);
7182 /* This is not an assert because it can be caused by bad debug info. */
7183 if (sig_type
->signature
!= cu
->header
.signature
)
7185 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
7186 " TU at offset %s [in module %s]"),
7187 hex_string (sig_type
->signature
),
7188 hex_string (cu
->header
.signature
),
7189 sect_offset_str (dwo_unit
->sect_off
),
7190 bfd_get_filename (abfd
));
7192 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7193 /* For DWOs coming from DWP files, we don't know the CU length
7194 nor the type's offset in the TU until now. */
7195 dwo_unit
->length
= get_cu_length (&cu
->header
);
7196 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
7198 /* Establish the type offset that can be used to lookup the type.
7199 For DWO files, we don't know it until now. */
7200 sig_type
->type_offset_in_section
7201 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
7205 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7206 &cu
->header
, section
,
7208 info_ptr
, rcuh_kind::COMPILE
);
7209 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7210 /* For DWOs coming from DWP files, we don't know the CU length
7212 dwo_unit
->length
= get_cu_length (&cu
->header
);
7215 *result_dwo_abbrev_table
7216 = abbrev_table_read_table (dwarf2_per_objfile
, dwo_abbrev_section
,
7217 cu
->header
.abbrev_sect_off
);
7218 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
7219 result_dwo_abbrev_table
->get ());
7221 /* Read in the die, but leave space to copy over the attributes
7222 from the stub. This has the benefit of simplifying the rest of
7223 the code - all the work to maintain the illusion of a single
7224 DW_TAG_{compile,type}_unit DIE is done here. */
7225 num_extra_attrs
= ((stmt_list
!= NULL
)
7229 + (comp_dir
!= NULL
));
7230 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
7231 result_has_children
, num_extra_attrs
);
7233 /* Copy over the attributes from the stub to the DIE we just read in. */
7234 comp_unit_die
= *result_comp_unit_die
;
7235 i
= comp_unit_die
->num_attrs
;
7236 if (stmt_list
!= NULL
)
7237 comp_unit_die
->attrs
[i
++] = *stmt_list
;
7239 comp_unit_die
->attrs
[i
++] = *low_pc
;
7240 if (high_pc
!= NULL
)
7241 comp_unit_die
->attrs
[i
++] = *high_pc
;
7243 comp_unit_die
->attrs
[i
++] = *ranges
;
7244 if (comp_dir
!= NULL
)
7245 comp_unit_die
->attrs
[i
++] = *comp_dir
;
7246 comp_unit_die
->num_attrs
+= num_extra_attrs
;
7248 if (dwarf_die_debug
)
7250 fprintf_unfiltered (gdb_stdlog
,
7251 "Read die from %s@0x%x of %s:\n",
7252 get_section_name (section
),
7253 (unsigned) (begin_info_ptr
- section
->buffer
),
7254 bfd_get_filename (abfd
));
7255 dump_die (comp_unit_die
, dwarf_die_debug
);
7258 /* Save the comp_dir attribute. If there is no DWP file then we'll read
7259 TUs by skipping the stub and going directly to the entry in the DWO file.
7260 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
7261 to get it via circuitous means. Blech. */
7262 if (comp_dir
!= NULL
)
7263 result_reader
->comp_dir
= DW_STRING (comp_dir
);
7265 /* Skip dummy compilation units. */
7266 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
7267 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7270 *result_info_ptr
= info_ptr
;
7274 /* Subroutine of init_cutu_and_read_dies to simplify it.
7275 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
7276 Returns NULL if the specified DWO unit cannot be found. */
7278 static struct dwo_unit
*
7279 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
7280 struct die_info
*comp_unit_die
)
7282 struct dwarf2_cu
*cu
= this_cu
->cu
;
7284 struct dwo_unit
*dwo_unit
;
7285 const char *comp_dir
, *dwo_name
;
7287 gdb_assert (cu
!= NULL
);
7289 /* Yeah, we look dwo_name up again, but it simplifies the code. */
7290 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7291 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7293 if (this_cu
->is_debug_types
)
7295 struct signatured_type
*sig_type
;
7297 /* Since this_cu is the first member of struct signatured_type,
7298 we can go from a pointer to one to a pointer to the other. */
7299 sig_type
= (struct signatured_type
*) this_cu
;
7300 signature
= sig_type
->signature
;
7301 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
7305 struct attribute
*attr
;
7307 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
7309 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
7311 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
7312 signature
= DW_UNSND (attr
);
7313 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
7320 /* Subroutine of init_cutu_and_read_dies to simplify it.
7321 See it for a description of the parameters.
7322 Read a TU directly from a DWO file, bypassing the stub. */
7325 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
7326 int use_existing_cu
, int keep
,
7327 die_reader_func_ftype
*die_reader_func
,
7330 std::unique_ptr
<dwarf2_cu
> new_cu
;
7331 struct signatured_type
*sig_type
;
7332 struct die_reader_specs reader
;
7333 const gdb_byte
*info_ptr
;
7334 struct die_info
*comp_unit_die
;
7336 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7338 /* Verify we can do the following downcast, and that we have the
7340 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
7341 sig_type
= (struct signatured_type
*) this_cu
;
7342 gdb_assert (sig_type
->dwo_unit
!= NULL
);
7344 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7346 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
7347 /* There's no need to do the rereading_dwo_cu handling that
7348 init_cutu_and_read_dies does since we don't read the stub. */
7352 /* If !use_existing_cu, this_cu->cu must be NULL. */
7353 gdb_assert (this_cu
->cu
== NULL
);
7354 new_cu
.reset (new dwarf2_cu (this_cu
));
7357 /* A future optimization, if needed, would be to use an existing
7358 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
7359 could share abbrev tables. */
7361 /* The abbreviation table used by READER, this must live at least as long as
7363 abbrev_table_up dwo_abbrev_table
;
7365 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
7366 NULL
/* stub_comp_unit_die */,
7367 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
7369 &comp_unit_die
, &has_children
,
7370 &dwo_abbrev_table
) == 0)
7376 /* All the "real" work is done here. */
7377 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7379 /* This duplicates the code in init_cutu_and_read_dies,
7380 but the alternative is making the latter more complex.
7381 This function is only for the special case of using DWO files directly:
7382 no point in overly complicating the general case just to handle this. */
7383 if (new_cu
!= NULL
&& keep
)
7385 /* Link this CU into read_in_chain. */
7386 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7387 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7388 /* The chain owns it now. */
7393 /* Initialize a CU (or TU) and read its DIEs.
7394 If the CU defers to a DWO file, read the DWO file as well.
7396 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
7397 Otherwise the table specified in the comp unit header is read in and used.
7398 This is an optimization for when we already have the abbrev table.
7400 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
7401 Otherwise, a new CU is allocated with xmalloc.
7403 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
7404 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
7406 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7407 linker) then DIE_READER_FUNC will not get called. */
7410 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
7411 struct abbrev_table
*abbrev_table
,
7412 int use_existing_cu
, int keep
,
7413 die_reader_func_ftype
*die_reader_func
,
7416 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7417 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7418 struct dwarf2_section_info
*section
= this_cu
->section
;
7419 bfd
*abfd
= get_section_bfd_owner (section
);
7420 struct dwarf2_cu
*cu
;
7421 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7422 struct die_reader_specs reader
;
7423 struct die_info
*comp_unit_die
;
7425 struct attribute
*attr
;
7426 struct signatured_type
*sig_type
= NULL
;
7427 struct dwarf2_section_info
*abbrev_section
;
7428 /* Non-zero if CU currently points to a DWO file and we need to
7429 reread it. When this happens we need to reread the skeleton die
7430 before we can reread the DWO file (this only applies to CUs, not TUs). */
7431 int rereading_dwo_cu
= 0;
7433 if (dwarf_die_debug
)
7434 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7435 this_cu
->is_debug_types
? "type" : "comp",
7436 sect_offset_str (this_cu
->sect_off
));
7438 if (use_existing_cu
)
7441 /* If we're reading a TU directly from a DWO file, including a virtual DWO
7442 file (instead of going through the stub), short-circuit all of this. */
7443 if (this_cu
->reading_dwo_directly
)
7445 /* Narrow down the scope of possibilities to have to understand. */
7446 gdb_assert (this_cu
->is_debug_types
);
7447 gdb_assert (abbrev_table
== NULL
);
7448 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
7449 die_reader_func
, data
);
7453 /* This is cheap if the section is already read in. */
7454 dwarf2_read_section (objfile
, section
);
7456 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7458 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
7460 std::unique_ptr
<dwarf2_cu
> new_cu
;
7461 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7464 /* If this CU is from a DWO file we need to start over, we need to
7465 refetch the attributes from the skeleton CU.
7466 This could be optimized by retrieving those attributes from when we
7467 were here the first time: the previous comp_unit_die was stored in
7468 comp_unit_obstack. But there's no data yet that we need this
7470 if (cu
->dwo_unit
!= NULL
)
7471 rereading_dwo_cu
= 1;
7475 /* If !use_existing_cu, this_cu->cu must be NULL. */
7476 gdb_assert (this_cu
->cu
== NULL
);
7477 new_cu
.reset (new dwarf2_cu (this_cu
));
7481 /* Get the header. */
7482 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7484 /* We already have the header, there's no need to read it in again. */
7485 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7489 if (this_cu
->is_debug_types
)
7491 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7492 &cu
->header
, section
,
7493 abbrev_section
, info_ptr
,
7496 /* Since per_cu is the first member of struct signatured_type,
7497 we can go from a pointer to one to a pointer to the other. */
7498 sig_type
= (struct signatured_type
*) this_cu
;
7499 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7500 gdb_assert (sig_type
->type_offset_in_tu
7501 == cu
->header
.type_cu_offset_in_tu
);
7502 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7504 /* LENGTH has not been set yet for type units if we're
7505 using .gdb_index. */
7506 this_cu
->length
= get_cu_length (&cu
->header
);
7508 /* Establish the type offset that can be used to lookup the type. */
7509 sig_type
->type_offset_in_section
=
7510 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7512 this_cu
->dwarf_version
= cu
->header
.version
;
7516 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7517 &cu
->header
, section
,
7520 rcuh_kind::COMPILE
);
7522 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7523 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
7524 this_cu
->dwarf_version
= cu
->header
.version
;
7528 /* Skip dummy compilation units. */
7529 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7530 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7533 /* If we don't have them yet, read the abbrevs for this compilation unit.
7534 And if we need to read them now, make sure they're freed when we're
7535 done (own the table through ABBREV_TABLE_HOLDER). */
7536 abbrev_table_up abbrev_table_holder
;
7537 if (abbrev_table
!= NULL
)
7538 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7542 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7543 cu
->header
.abbrev_sect_off
);
7544 abbrev_table
= abbrev_table_holder
.get ();
7547 /* Read the top level CU/TU die. */
7548 init_cu_die_reader (&reader
, cu
, section
, NULL
, abbrev_table
);
7549 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7551 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7552 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7553 table from the DWO file and pass the ownership over to us. It will be
7554 referenced from READER, so we must make sure to free it after we're done
7557 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7558 DWO CU, that this test will fail (the attribute will not be present). */
7559 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7560 abbrev_table_up dwo_abbrev_table
;
7563 struct dwo_unit
*dwo_unit
;
7564 struct die_info
*dwo_comp_unit_die
;
7568 complaint (&symfile_complaints
,
7569 _("compilation unit with DW_AT_GNU_dwo_name"
7570 " has children (offset %s) [in module %s]"),
7571 sect_offset_str (this_cu
->sect_off
),
7572 bfd_get_filename (abfd
));
7574 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
7575 if (dwo_unit
!= NULL
)
7577 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
7578 comp_unit_die
, NULL
,
7580 &dwo_comp_unit_die
, &has_children
,
7581 &dwo_abbrev_table
) == 0)
7586 comp_unit_die
= dwo_comp_unit_die
;
7590 /* Yikes, we couldn't find the rest of the DIE, we only have
7591 the stub. A complaint has already been logged. There's
7592 not much more we can do except pass on the stub DIE to
7593 die_reader_func. We don't want to throw an error on bad
7598 /* All of the above is setup for this call. Yikes. */
7599 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7601 /* Done, clean up. */
7602 if (new_cu
!= NULL
&& keep
)
7604 /* Link this CU into read_in_chain. */
7605 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7606 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7607 /* The chain owns it now. */
7612 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
7613 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
7614 to have already done the lookup to find the DWO file).
7616 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7617 THIS_CU->is_debug_types, but nothing else.
7619 We fill in THIS_CU->length.
7621 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7622 linker) then DIE_READER_FUNC will not get called.
7624 THIS_CU->cu is always freed when done.
7625 This is done in order to not leave THIS_CU->cu in a state where we have
7626 to care whether it refers to the "main" CU or the DWO CU. */
7629 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
7630 struct dwo_file
*dwo_file
,
7631 die_reader_func_ftype
*die_reader_func
,
7634 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7635 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7636 struct dwarf2_section_info
*section
= this_cu
->section
;
7637 bfd
*abfd
= get_section_bfd_owner (section
);
7638 struct dwarf2_section_info
*abbrev_section
;
7639 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7640 struct die_reader_specs reader
;
7641 struct die_info
*comp_unit_die
;
7644 if (dwarf_die_debug
)
7645 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7646 this_cu
->is_debug_types
? "type" : "comp",
7647 sect_offset_str (this_cu
->sect_off
));
7649 gdb_assert (this_cu
->cu
== NULL
);
7651 abbrev_section
= (dwo_file
!= NULL
7652 ? &dwo_file
->sections
.abbrev
7653 : get_abbrev_section_for_cu (this_cu
));
7655 /* This is cheap if the section is already read in. */
7656 dwarf2_read_section (objfile
, section
);
7658 struct dwarf2_cu
cu (this_cu
);
7660 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7661 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7662 &cu
.header
, section
,
7663 abbrev_section
, info_ptr
,
7664 (this_cu
->is_debug_types
7666 : rcuh_kind::COMPILE
));
7668 this_cu
->length
= get_cu_length (&cu
.header
);
7670 /* Skip dummy compilation units. */
7671 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7672 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7675 abbrev_table_up abbrev_table
7676 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7677 cu
.header
.abbrev_sect_off
);
7679 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
, abbrev_table
.get ());
7680 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7682 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7685 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
7686 does not lookup the specified DWO file.
7687 This cannot be used to read DWO files.
7689 THIS_CU->cu is always freed when done.
7690 This is done in order to not leave THIS_CU->cu in a state where we have
7691 to care whether it refers to the "main" CU or the DWO CU.
7692 We can revisit this if the data shows there's a performance issue. */
7695 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
7696 die_reader_func_ftype
*die_reader_func
,
7699 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
7702 /* Type Unit Groups.
7704 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7705 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7706 so that all types coming from the same compilation (.o file) are grouped
7707 together. A future step could be to put the types in the same symtab as
7708 the CU the types ultimately came from. */
7711 hash_type_unit_group (const void *item
)
7713 const struct type_unit_group
*tu_group
7714 = (const struct type_unit_group
*) item
;
7716 return hash_stmt_list_entry (&tu_group
->hash
);
7720 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7722 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7723 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7725 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7728 /* Allocate a hash table for type unit groups. */
7731 allocate_type_unit_groups_table (struct objfile
*objfile
)
7733 return htab_create_alloc_ex (3,
7734 hash_type_unit_group
,
7737 &objfile
->objfile_obstack
,
7738 hashtab_obstack_allocate
,
7739 dummy_obstack_deallocate
);
7742 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7743 partial symtabs. We combine several TUs per psymtab to not let the size
7744 of any one psymtab grow too big. */
7745 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7746 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7748 /* Helper routine for get_type_unit_group.
7749 Create the type_unit_group object used to hold one or more TUs. */
7751 static struct type_unit_group
*
7752 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7754 struct dwarf2_per_objfile
*dwarf2_per_objfile
7755 = cu
->per_cu
->dwarf2_per_objfile
;
7756 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7757 struct dwarf2_per_cu_data
*per_cu
;
7758 struct type_unit_group
*tu_group
;
7760 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7761 struct type_unit_group
);
7762 per_cu
= &tu_group
->per_cu
;
7763 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7765 if (dwarf2_per_objfile
->using_index
)
7767 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7768 struct dwarf2_per_cu_quick_data
);
7772 unsigned int line_offset
= to_underlying (line_offset_struct
);
7773 struct partial_symtab
*pst
;
7776 /* Give the symtab a useful name for debug purposes. */
7777 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7778 name
= xstrprintf ("<type_units_%d>",
7779 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7781 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
7783 pst
= create_partial_symtab (per_cu
, name
);
7789 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7790 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7795 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7796 STMT_LIST is a DW_AT_stmt_list attribute. */
7798 static struct type_unit_group
*
7799 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7801 struct dwarf2_per_objfile
*dwarf2_per_objfile
7802 = cu
->per_cu
->dwarf2_per_objfile
;
7803 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7804 struct type_unit_group
*tu_group
;
7806 unsigned int line_offset
;
7807 struct type_unit_group type_unit_group_for_lookup
;
7809 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7811 dwarf2_per_objfile
->type_unit_groups
=
7812 allocate_type_unit_groups_table (dwarf2_per_objfile
->objfile
);
7815 /* Do we need to create a new group, or can we use an existing one? */
7819 line_offset
= DW_UNSND (stmt_list
);
7820 ++tu_stats
->nr_symtab_sharers
;
7824 /* Ugh, no stmt_list. Rare, but we have to handle it.
7825 We can do various things here like create one group per TU or
7826 spread them over multiple groups to split up the expansion work.
7827 To avoid worst case scenarios (too many groups or too large groups)
7828 we, umm, group them in bunches. */
7829 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7830 | (tu_stats
->nr_stmt_less_type_units
7831 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7832 ++tu_stats
->nr_stmt_less_type_units
;
7835 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7836 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7837 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
7838 &type_unit_group_for_lookup
, INSERT
);
7841 tu_group
= (struct type_unit_group
*) *slot
;
7842 gdb_assert (tu_group
!= NULL
);
7846 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7847 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7849 ++tu_stats
->nr_symtabs
;
7855 /* Partial symbol tables. */
7857 /* Create a psymtab named NAME and assign it to PER_CU.
7859 The caller must fill in the following details:
7860 dirname, textlow, texthigh. */
7862 static struct partial_symtab
*
7863 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7865 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7866 struct partial_symtab
*pst
;
7868 pst
= start_psymtab_common (objfile
, name
, 0,
7869 objfile
->global_psymbols
,
7870 objfile
->static_psymbols
);
7872 pst
->psymtabs_addrmap_supported
= 1;
7874 /* This is the glue that links PST into GDB's symbol API. */
7875 pst
->read_symtab_private
= per_cu
;
7876 pst
->read_symtab
= dwarf2_read_symtab
;
7877 per_cu
->v
.psymtab
= pst
;
7882 /* The DATA object passed to process_psymtab_comp_unit_reader has this
7885 struct process_psymtab_comp_unit_data
7887 /* True if we are reading a DW_TAG_partial_unit. */
7889 int want_partial_unit
;
7891 /* The "pretend" language that is used if the CU doesn't declare a
7894 enum language pretend_language
;
7897 /* die_reader_func for process_psymtab_comp_unit. */
7900 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7901 const gdb_byte
*info_ptr
,
7902 struct die_info
*comp_unit_die
,
7906 struct dwarf2_cu
*cu
= reader
->cu
;
7907 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7908 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7909 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7911 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7912 struct partial_symtab
*pst
;
7913 enum pc_bounds_kind cu_bounds_kind
;
7914 const char *filename
;
7915 struct process_psymtab_comp_unit_data
*info
7916 = (struct process_psymtab_comp_unit_data
*) data
;
7918 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
7921 gdb_assert (! per_cu
->is_debug_types
);
7923 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
7925 cu
->list_in_scope
= &file_symbols
;
7927 /* Allocate a new partial symbol table structure. */
7928 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7929 if (filename
== NULL
)
7932 pst
= create_partial_symtab (per_cu
, filename
);
7934 /* This must be done before calling dwarf2_build_include_psymtabs. */
7935 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7937 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7939 dwarf2_find_base_address (comp_unit_die
, cu
);
7941 /* Possibly set the default values of LOWPC and HIGHPC from
7943 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7944 &best_highpc
, cu
, pst
);
7945 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7946 /* Store the contiguous range if it is not empty; it can be empty for
7947 CUs with no code. */
7948 addrmap_set_empty (objfile
->psymtabs_addrmap
,
7949 gdbarch_adjust_dwarf2_addr (gdbarch
,
7950 best_lowpc
+ baseaddr
),
7951 gdbarch_adjust_dwarf2_addr (gdbarch
,
7952 best_highpc
+ baseaddr
) - 1,
7955 /* Check if comp unit has_children.
7956 If so, read the rest of the partial symbols from this comp unit.
7957 If not, there's no more debug_info for this comp unit. */
7960 struct partial_die_info
*first_die
;
7961 CORE_ADDR lowpc
, highpc
;
7963 lowpc
= ((CORE_ADDR
) -1);
7964 highpc
= ((CORE_ADDR
) 0);
7966 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7968 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7969 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7971 /* If we didn't find a lowpc, set it to highpc to avoid
7972 complaints from `maint check'. */
7973 if (lowpc
== ((CORE_ADDR
) -1))
7976 /* If the compilation unit didn't have an explicit address range,
7977 then use the information extracted from its child dies. */
7978 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7981 best_highpc
= highpc
;
7984 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
7985 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
7987 end_psymtab_common (objfile
, pst
);
7989 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
7992 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
7993 struct dwarf2_per_cu_data
*iter
;
7995 /* Fill in 'dependencies' here; we fill in 'users' in a
7997 pst
->number_of_dependencies
= len
;
7999 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
8001 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8004 pst
->dependencies
[i
] = iter
->v
.psymtab
;
8006 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
8009 /* Get the list of files included in the current compilation unit,
8010 and build a psymtab for each of them. */
8011 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
8013 if (dwarf_read_debug
)
8015 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8017 fprintf_unfiltered (gdb_stdlog
,
8018 "Psymtab for %s unit @%s: %s - %s"
8019 ", %d global, %d static syms\n",
8020 per_cu
->is_debug_types
? "type" : "comp",
8021 sect_offset_str (per_cu
->sect_off
),
8022 paddress (gdbarch
, pst
->textlow
),
8023 paddress (gdbarch
, pst
->texthigh
),
8024 pst
->n_global_syms
, pst
->n_static_syms
);
8028 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8029 Process compilation unit THIS_CU for a psymtab. */
8032 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8033 int want_partial_unit
,
8034 enum language pretend_language
)
8036 /* If this compilation unit was already read in, free the
8037 cached copy in order to read it in again. This is
8038 necessary because we skipped some symbols when we first
8039 read in the compilation unit (see load_partial_dies).
8040 This problem could be avoided, but the benefit is unclear. */
8041 if (this_cu
->cu
!= NULL
)
8042 free_one_cached_comp_unit (this_cu
);
8044 if (this_cu
->is_debug_types
)
8045 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, build_type_psymtabs_reader
,
8049 process_psymtab_comp_unit_data info
;
8050 info
.want_partial_unit
= want_partial_unit
;
8051 info
.pretend_language
= pretend_language
;
8052 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
8053 process_psymtab_comp_unit_reader
, &info
);
8056 /* Age out any secondary CUs. */
8057 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
8060 /* Reader function for build_type_psymtabs. */
8063 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
8064 const gdb_byte
*info_ptr
,
8065 struct die_info
*type_unit_die
,
8069 struct dwarf2_per_objfile
*dwarf2_per_objfile
8070 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
8071 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8072 struct dwarf2_cu
*cu
= reader
->cu
;
8073 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8074 struct signatured_type
*sig_type
;
8075 struct type_unit_group
*tu_group
;
8076 struct attribute
*attr
;
8077 struct partial_die_info
*first_die
;
8078 CORE_ADDR lowpc
, highpc
;
8079 struct partial_symtab
*pst
;
8081 gdb_assert (data
== NULL
);
8082 gdb_assert (per_cu
->is_debug_types
);
8083 sig_type
= (struct signatured_type
*) per_cu
;
8088 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
8089 tu_group
= get_type_unit_group (cu
, attr
);
8091 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
8093 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
8094 cu
->list_in_scope
= &file_symbols
;
8095 pst
= create_partial_symtab (per_cu
, "");
8098 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8100 lowpc
= (CORE_ADDR
) -1;
8101 highpc
= (CORE_ADDR
) 0;
8102 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
8104 end_psymtab_common (objfile
, pst
);
8107 /* Struct used to sort TUs by their abbreviation table offset. */
8109 struct tu_abbrev_offset
8111 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
8112 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
8115 signatured_type
*sig_type
;
8116 sect_offset abbrev_offset
;
8119 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
8122 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
8123 const struct tu_abbrev_offset
&b
)
8125 return a
.abbrev_offset
< b
.abbrev_offset
;
8128 /* Efficiently read all the type units.
8129 This does the bulk of the work for build_type_psymtabs.
8131 The efficiency is because we sort TUs by the abbrev table they use and
8132 only read each abbrev table once. In one program there are 200K TUs
8133 sharing 8K abbrev tables.
8135 The main purpose of this function is to support building the
8136 dwarf2_per_objfile->type_unit_groups table.
8137 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
8138 can collapse the search space by grouping them by stmt_list.
8139 The savings can be significant, in the same program from above the 200K TUs
8140 share 8K stmt_list tables.
8142 FUNC is expected to call get_type_unit_group, which will create the
8143 struct type_unit_group if necessary and add it to
8144 dwarf2_per_objfile->type_unit_groups. */
8147 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8149 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8150 abbrev_table_up abbrev_table
;
8151 sect_offset abbrev_offset
;
8153 /* It's up to the caller to not call us multiple times. */
8154 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
8156 if (dwarf2_per_objfile
->all_type_units
.empty ())
8159 /* TUs typically share abbrev tables, and there can be way more TUs than
8160 abbrev tables. Sort by abbrev table to reduce the number of times we
8161 read each abbrev table in.
8162 Alternatives are to punt or to maintain a cache of abbrev tables.
8163 This is simpler and efficient enough for now.
8165 Later we group TUs by their DW_AT_stmt_list value (as this defines the
8166 symtab to use). Typically TUs with the same abbrev offset have the same
8167 stmt_list value too so in practice this should work well.
8169 The basic algorithm here is:
8171 sort TUs by abbrev table
8172 for each TU with same abbrev table:
8173 read abbrev table if first user
8174 read TU top level DIE
8175 [IWBN if DWO skeletons had DW_AT_stmt_list]
8178 if (dwarf_read_debug
)
8179 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
8181 /* Sort in a separate table to maintain the order of all_type_units
8182 for .gdb_index: TU indices directly index all_type_units. */
8183 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
8184 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->all_type_units
.size ());
8186 for (signatured_type
*sig_type
: dwarf2_per_objfile
->all_type_units
)
8187 sorted_by_abbrev
.emplace_back
8188 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
8189 sig_type
->per_cu
.section
,
8190 sig_type
->per_cu
.sect_off
));
8192 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
8193 sort_tu_by_abbrev_offset
);
8195 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
8197 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
8199 /* Switch to the next abbrev table if necessary. */
8200 if (abbrev_table
== NULL
8201 || tu
.abbrev_offset
!= abbrev_offset
)
8203 abbrev_offset
= tu
.abbrev_offset
;
8205 abbrev_table_read_table (dwarf2_per_objfile
,
8206 &dwarf2_per_objfile
->abbrev
,
8208 ++tu_stats
->nr_uniq_abbrev_tables
;
8211 init_cutu_and_read_dies (&tu
.sig_type
->per_cu
, abbrev_table
.get (),
8212 0, 0, build_type_psymtabs_reader
, NULL
);
8216 /* Print collected type unit statistics. */
8219 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8221 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8223 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
8224 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
8225 dwarf2_per_objfile
->all_type_units
.size ());
8226 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
8227 tu_stats
->nr_uniq_abbrev_tables
);
8228 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
8229 tu_stats
->nr_symtabs
);
8230 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
8231 tu_stats
->nr_symtab_sharers
);
8232 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
8233 tu_stats
->nr_stmt_less_type_units
);
8234 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
8235 tu_stats
->nr_all_type_units_reallocs
);
8238 /* Traversal function for build_type_psymtabs. */
8241 build_type_psymtab_dependencies (void **slot
, void *info
)
8243 struct dwarf2_per_objfile
*dwarf2_per_objfile
8244 = (struct dwarf2_per_objfile
*) info
;
8245 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8246 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
8247 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
8248 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8249 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
8250 struct signatured_type
*iter
;
8253 gdb_assert (len
> 0);
8254 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
8256 pst
->number_of_dependencies
= len
;
8258 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
8260 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
8263 gdb_assert (iter
->per_cu
.is_debug_types
);
8264 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
8265 iter
->type_unit_group
= tu_group
;
8268 VEC_free (sig_type_ptr
, tu_group
->tus
);
8273 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8274 Build partial symbol tables for the .debug_types comp-units. */
8277 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8279 if (! create_all_type_units (dwarf2_per_objfile
))
8282 build_type_psymtabs_1 (dwarf2_per_objfile
);
8285 /* Traversal function for process_skeletonless_type_unit.
8286 Read a TU in a DWO file and build partial symbols for it. */
8289 process_skeletonless_type_unit (void **slot
, void *info
)
8291 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
8292 struct dwarf2_per_objfile
*dwarf2_per_objfile
8293 = (struct dwarf2_per_objfile
*) info
;
8294 struct signatured_type find_entry
, *entry
;
8296 /* If this TU doesn't exist in the global table, add it and read it in. */
8298 if (dwarf2_per_objfile
->signatured_types
== NULL
)
8300 dwarf2_per_objfile
->signatured_types
8301 = allocate_signatured_type_table (dwarf2_per_objfile
->objfile
);
8304 find_entry
.signature
= dwo_unit
->signature
;
8305 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
8307 /* If we've already seen this type there's nothing to do. What's happening
8308 is we're doing our own version of comdat-folding here. */
8312 /* This does the job that create_all_type_units would have done for
8314 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
8315 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
8318 /* This does the job that build_type_psymtabs_1 would have done. */
8319 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
8320 build_type_psymtabs_reader
, NULL
);
8325 /* Traversal function for process_skeletonless_type_units. */
8328 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
8330 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
8332 if (dwo_file
->tus
!= NULL
)
8334 htab_traverse_noresize (dwo_file
->tus
,
8335 process_skeletonless_type_unit
, info
);
8341 /* Scan all TUs of DWO files, verifying we've processed them.
8342 This is needed in case a TU was emitted without its skeleton.
8343 Note: This can't be done until we know what all the DWO files are. */
8346 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8348 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
8349 if (get_dwp_file (dwarf2_per_objfile
) == NULL
8350 && dwarf2_per_objfile
->dwo_files
!= NULL
)
8352 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
8353 process_dwo_file_for_skeletonless_type_units
,
8354 dwarf2_per_objfile
);
8358 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
8361 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8363 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8365 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8370 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
8372 /* Set the 'user' field only if it is not already set. */
8373 if (pst
->dependencies
[j
]->user
== NULL
)
8374 pst
->dependencies
[j
]->user
= pst
;
8379 /* Build the partial symbol table by doing a quick pass through the
8380 .debug_info and .debug_abbrev sections. */
8383 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8385 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8387 if (dwarf_read_debug
)
8389 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
8390 objfile_name (objfile
));
8393 dwarf2_per_objfile
->reading_partial_symbols
= 1;
8395 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
8397 /* Any cached compilation units will be linked by the per-objfile
8398 read_in_chain. Make sure to free them when we're done. */
8399 free_cached_comp_units
freer (dwarf2_per_objfile
);
8401 build_type_psymtabs (dwarf2_per_objfile
);
8403 create_all_comp_units (dwarf2_per_objfile
);
8405 /* Create a temporary address map on a temporary obstack. We later
8406 copy this to the final obstack. */
8407 auto_obstack temp_obstack
;
8409 scoped_restore save_psymtabs_addrmap
8410 = make_scoped_restore (&objfile
->psymtabs_addrmap
,
8411 addrmap_create_mutable (&temp_obstack
));
8413 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8414 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
8416 /* This has to wait until we read the CUs, we need the list of DWOs. */
8417 process_skeletonless_type_units (dwarf2_per_objfile
);
8419 /* Now that all TUs have been processed we can fill in the dependencies. */
8420 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
8422 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
8423 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
8426 if (dwarf_read_debug
)
8427 print_tu_stats (dwarf2_per_objfile
);
8429 set_partial_user (dwarf2_per_objfile
);
8431 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
8432 &objfile
->objfile_obstack
);
8433 /* At this point we want to keep the address map. */
8434 save_psymtabs_addrmap
.release ();
8436 if (dwarf_read_debug
)
8437 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
8438 objfile_name (objfile
));
8441 /* die_reader_func for load_partial_comp_unit. */
8444 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
8445 const gdb_byte
*info_ptr
,
8446 struct die_info
*comp_unit_die
,
8450 struct dwarf2_cu
*cu
= reader
->cu
;
8452 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
8454 /* Check if comp unit has_children.
8455 If so, read the rest of the partial symbols from this comp unit.
8456 If not, there's no more debug_info for this comp unit. */
8458 load_partial_dies (reader
, info_ptr
, 0);
8461 /* Load the partial DIEs for a secondary CU into memory.
8462 This is also used when rereading a primary CU with load_all_dies. */
8465 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
8467 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
8468 load_partial_comp_unit_reader
, NULL
);
8472 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
8473 struct dwarf2_section_info
*section
,
8474 struct dwarf2_section_info
*abbrev_section
,
8475 unsigned int is_dwz
)
8477 const gdb_byte
*info_ptr
;
8478 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8480 if (dwarf_read_debug
)
8481 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
8482 get_section_name (section
),
8483 get_section_file_name (section
));
8485 dwarf2_read_section (objfile
, section
);
8487 info_ptr
= section
->buffer
;
8489 while (info_ptr
< section
->buffer
+ section
->size
)
8491 struct dwarf2_per_cu_data
*this_cu
;
8493 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
8495 comp_unit_head cu_header
;
8496 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
8497 abbrev_section
, info_ptr
,
8498 rcuh_kind::COMPILE
);
8500 /* Save the compilation unit for later lookup. */
8501 if (cu_header
.unit_type
!= DW_UT_type
)
8503 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
8504 struct dwarf2_per_cu_data
);
8505 memset (this_cu
, 0, sizeof (*this_cu
));
8509 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
8510 struct signatured_type
);
8511 memset (sig_type
, 0, sizeof (*sig_type
));
8512 sig_type
->signature
= cu_header
.signature
;
8513 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
8514 this_cu
= &sig_type
->per_cu
;
8516 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
8517 this_cu
->sect_off
= sect_off
;
8518 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
8519 this_cu
->is_dwz
= is_dwz
;
8520 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
8521 this_cu
->section
= section
;
8523 dwarf2_per_objfile
->all_comp_units
.push_back (this_cu
);
8525 info_ptr
= info_ptr
+ this_cu
->length
;
8529 /* Create a list of all compilation units in OBJFILE.
8530 This is only done for -readnow and building partial symtabs. */
8533 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8535 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
8536 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
8537 &dwarf2_per_objfile
->abbrev
, 0);
8539 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
8541 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
8545 /* Process all loaded DIEs for compilation unit CU, starting at
8546 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8547 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8548 DW_AT_ranges). See the comments of add_partial_subprogram on how
8549 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8552 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8553 CORE_ADDR
*highpc
, int set_addrmap
,
8554 struct dwarf2_cu
*cu
)
8556 struct partial_die_info
*pdi
;
8558 /* Now, march along the PDI's, descending into ones which have
8559 interesting children but skipping the children of the other ones,
8560 until we reach the end of the compilation unit. */
8568 /* Anonymous namespaces or modules have no name but have interesting
8569 children, so we need to look at them. Ditto for anonymous
8572 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8573 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8574 || pdi
->tag
== DW_TAG_imported_unit
8575 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8579 case DW_TAG_subprogram
:
8580 case DW_TAG_inlined_subroutine
:
8581 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8583 case DW_TAG_constant
:
8584 case DW_TAG_variable
:
8585 case DW_TAG_typedef
:
8586 case DW_TAG_union_type
:
8587 if (!pdi
->is_declaration
)
8589 add_partial_symbol (pdi
, cu
);
8592 case DW_TAG_class_type
:
8593 case DW_TAG_interface_type
:
8594 case DW_TAG_structure_type
:
8595 if (!pdi
->is_declaration
)
8597 add_partial_symbol (pdi
, cu
);
8599 if ((cu
->language
== language_rust
8600 || cu
->language
== language_cplus
) && pdi
->has_children
)
8601 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8604 case DW_TAG_enumeration_type
:
8605 if (!pdi
->is_declaration
)
8606 add_partial_enumeration (pdi
, cu
);
8608 case DW_TAG_base_type
:
8609 case DW_TAG_subrange_type
:
8610 /* File scope base type definitions are added to the partial
8612 add_partial_symbol (pdi
, cu
);
8614 case DW_TAG_namespace
:
8615 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8618 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8620 case DW_TAG_imported_unit
:
8622 struct dwarf2_per_cu_data
*per_cu
;
8624 /* For now we don't handle imported units in type units. */
8625 if (cu
->per_cu
->is_debug_types
)
8627 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8628 " supported in type units [in module %s]"),
8629 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8632 per_cu
= dwarf2_find_containing_comp_unit
8633 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8634 cu
->per_cu
->dwarf2_per_objfile
);
8636 /* Go read the partial unit, if needed. */
8637 if (per_cu
->v
.psymtab
== NULL
)
8638 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
8640 VEC_safe_push (dwarf2_per_cu_ptr
,
8641 cu
->per_cu
->imported_symtabs
, per_cu
);
8644 case DW_TAG_imported_declaration
:
8645 add_partial_symbol (pdi
, cu
);
8652 /* If the die has a sibling, skip to the sibling. */
8654 pdi
= pdi
->die_sibling
;
8658 /* Functions used to compute the fully scoped name of a partial DIE.
8660 Normally, this is simple. For C++, the parent DIE's fully scoped
8661 name is concatenated with "::" and the partial DIE's name.
8662 Enumerators are an exception; they use the scope of their parent
8663 enumeration type, i.e. the name of the enumeration type is not
8664 prepended to the enumerator.
8666 There are two complexities. One is DW_AT_specification; in this
8667 case "parent" means the parent of the target of the specification,
8668 instead of the direct parent of the DIE. The other is compilers
8669 which do not emit DW_TAG_namespace; in this case we try to guess
8670 the fully qualified name of structure types from their members'
8671 linkage names. This must be done using the DIE's children rather
8672 than the children of any DW_AT_specification target. We only need
8673 to do this for structures at the top level, i.e. if the target of
8674 any DW_AT_specification (if any; otherwise the DIE itself) does not
8677 /* Compute the scope prefix associated with PDI's parent, in
8678 compilation unit CU. The result will be allocated on CU's
8679 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8680 field. NULL is returned if no prefix is necessary. */
8682 partial_die_parent_scope (struct partial_die_info
*pdi
,
8683 struct dwarf2_cu
*cu
)
8685 const char *grandparent_scope
;
8686 struct partial_die_info
*parent
, *real_pdi
;
8688 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8689 then this means the parent of the specification DIE. */
8692 while (real_pdi
->has_specification
)
8693 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
8694 real_pdi
->spec_is_dwz
, cu
);
8696 parent
= real_pdi
->die_parent
;
8700 if (parent
->scope_set
)
8701 return parent
->scope
;
8705 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8707 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8708 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8709 Work around this problem here. */
8710 if (cu
->language
== language_cplus
8711 && parent
->tag
== DW_TAG_namespace
8712 && strcmp (parent
->name
, "::") == 0
8713 && grandparent_scope
== NULL
)
8715 parent
->scope
= NULL
;
8716 parent
->scope_set
= 1;
8720 if (pdi
->tag
== DW_TAG_enumerator
)
8721 /* Enumerators should not get the name of the enumeration as a prefix. */
8722 parent
->scope
= grandparent_scope
;
8723 else if (parent
->tag
== DW_TAG_namespace
8724 || parent
->tag
== DW_TAG_module
8725 || parent
->tag
== DW_TAG_structure_type
8726 || parent
->tag
== DW_TAG_class_type
8727 || parent
->tag
== DW_TAG_interface_type
8728 || parent
->tag
== DW_TAG_union_type
8729 || parent
->tag
== DW_TAG_enumeration_type
)
8731 if (grandparent_scope
== NULL
)
8732 parent
->scope
= parent
->name
;
8734 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8736 parent
->name
, 0, cu
);
8740 /* FIXME drow/2004-04-01: What should we be doing with
8741 function-local names? For partial symbols, we should probably be
8743 complaint (&symfile_complaints
,
8744 _("unhandled containing DIE tag %d for DIE at %s"),
8745 parent
->tag
, sect_offset_str (pdi
->sect_off
));
8746 parent
->scope
= grandparent_scope
;
8749 parent
->scope_set
= 1;
8750 return parent
->scope
;
8753 /* Return the fully scoped name associated with PDI, from compilation unit
8754 CU. The result will be allocated with malloc. */
8757 partial_die_full_name (struct partial_die_info
*pdi
,
8758 struct dwarf2_cu
*cu
)
8760 const char *parent_scope
;
8762 /* If this is a template instantiation, we can not work out the
8763 template arguments from partial DIEs. So, unfortunately, we have
8764 to go through the full DIEs. At least any work we do building
8765 types here will be reused if full symbols are loaded later. */
8766 if (pdi
->has_template_arguments
)
8770 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8772 struct die_info
*die
;
8773 struct attribute attr
;
8774 struct dwarf2_cu
*ref_cu
= cu
;
8776 /* DW_FORM_ref_addr is using section offset. */
8777 attr
.name
= (enum dwarf_attribute
) 0;
8778 attr
.form
= DW_FORM_ref_addr
;
8779 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8780 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8782 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8786 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8787 if (parent_scope
== NULL
)
8790 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
8794 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8796 struct dwarf2_per_objfile
*dwarf2_per_objfile
8797 = cu
->per_cu
->dwarf2_per_objfile
;
8798 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8799 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8801 const char *actual_name
= NULL
;
8803 char *built_actual_name
;
8805 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8807 built_actual_name
= partial_die_full_name (pdi
, cu
);
8808 if (built_actual_name
!= NULL
)
8809 actual_name
= built_actual_name
;
8811 if (actual_name
== NULL
)
8812 actual_name
= pdi
->name
;
8816 case DW_TAG_inlined_subroutine
:
8817 case DW_TAG_subprogram
:
8818 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
8819 if (pdi
->is_external
|| cu
->language
== language_ada
)
8821 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
8822 of the global scope. But in Ada, we want to be able to access
8823 nested procedures globally. So all Ada subprograms are stored
8824 in the global scope. */
8825 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8826 built_actual_name
!= NULL
,
8827 VAR_DOMAIN
, LOC_BLOCK
,
8828 &objfile
->global_psymbols
,
8829 addr
, cu
->language
, objfile
);
8833 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8834 built_actual_name
!= NULL
,
8835 VAR_DOMAIN
, LOC_BLOCK
,
8836 &objfile
->static_psymbols
,
8837 addr
, cu
->language
, objfile
);
8840 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8841 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8843 case DW_TAG_constant
:
8845 std::vector
<partial_symbol
*> *list
;
8847 if (pdi
->is_external
)
8848 list
= &objfile
->global_psymbols
;
8850 list
= &objfile
->static_psymbols
;
8851 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8852 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
8853 list
, 0, cu
->language
, objfile
);
8856 case DW_TAG_variable
:
8858 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8862 && !dwarf2_per_objfile
->has_section_at_zero
)
8864 /* A global or static variable may also have been stripped
8865 out by the linker if unused, in which case its address
8866 will be nullified; do not add such variables into partial
8867 symbol table then. */
8869 else if (pdi
->is_external
)
8872 Don't enter into the minimal symbol tables as there is
8873 a minimal symbol table entry from the ELF symbols already.
8874 Enter into partial symbol table if it has a location
8875 descriptor or a type.
8876 If the location descriptor is missing, new_symbol will create
8877 a LOC_UNRESOLVED symbol, the address of the variable will then
8878 be determined from the minimal symbol table whenever the variable
8880 The address for the partial symbol table entry is not
8881 used by GDB, but it comes in handy for debugging partial symbol
8884 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8885 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8886 built_actual_name
!= NULL
,
8887 VAR_DOMAIN
, LOC_STATIC
,
8888 &objfile
->global_psymbols
,
8890 cu
->language
, objfile
);
8894 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8896 /* Static Variable. Skip symbols whose value we cannot know (those
8897 without location descriptors or constant values). */
8898 if (!has_loc
&& !pdi
->has_const_value
)
8900 xfree (built_actual_name
);
8904 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8905 built_actual_name
!= NULL
,
8906 VAR_DOMAIN
, LOC_STATIC
,
8907 &objfile
->static_psymbols
,
8908 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
8909 cu
->language
, objfile
);
8912 case DW_TAG_typedef
:
8913 case DW_TAG_base_type
:
8914 case DW_TAG_subrange_type
:
8915 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8916 built_actual_name
!= NULL
,
8917 VAR_DOMAIN
, LOC_TYPEDEF
,
8918 &objfile
->static_psymbols
,
8919 0, cu
->language
, objfile
);
8921 case DW_TAG_imported_declaration
:
8922 case DW_TAG_namespace
:
8923 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8924 built_actual_name
!= NULL
,
8925 VAR_DOMAIN
, LOC_TYPEDEF
,
8926 &objfile
->global_psymbols
,
8927 0, cu
->language
, objfile
);
8930 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8931 built_actual_name
!= NULL
,
8932 MODULE_DOMAIN
, LOC_TYPEDEF
,
8933 &objfile
->global_psymbols
,
8934 0, cu
->language
, objfile
);
8936 case DW_TAG_class_type
:
8937 case DW_TAG_interface_type
:
8938 case DW_TAG_structure_type
:
8939 case DW_TAG_union_type
:
8940 case DW_TAG_enumeration_type
:
8941 /* Skip external references. The DWARF standard says in the section
8942 about "Structure, Union, and Class Type Entries": "An incomplete
8943 structure, union or class type is represented by a structure,
8944 union or class entry that does not have a byte size attribute
8945 and that has a DW_AT_declaration attribute." */
8946 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8948 xfree (built_actual_name
);
8952 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8953 static vs. global. */
8954 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8955 built_actual_name
!= NULL
,
8956 STRUCT_DOMAIN
, LOC_TYPEDEF
,
8957 cu
->language
== language_cplus
8958 ? &objfile
->global_psymbols
8959 : &objfile
->static_psymbols
,
8960 0, cu
->language
, objfile
);
8963 case DW_TAG_enumerator
:
8964 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8965 built_actual_name
!= NULL
,
8966 VAR_DOMAIN
, LOC_CONST
,
8967 cu
->language
== language_cplus
8968 ? &objfile
->global_psymbols
8969 : &objfile
->static_psymbols
,
8970 0, cu
->language
, objfile
);
8976 xfree (built_actual_name
);
8979 /* Read a partial die corresponding to a namespace; also, add a symbol
8980 corresponding to that namespace to the symbol table. NAMESPACE is
8981 the name of the enclosing namespace. */
8984 add_partial_namespace (struct partial_die_info
*pdi
,
8985 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8986 int set_addrmap
, struct dwarf2_cu
*cu
)
8988 /* Add a symbol for the namespace. */
8990 add_partial_symbol (pdi
, cu
);
8992 /* Now scan partial symbols in that namespace. */
8994 if (pdi
->has_children
)
8995 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8998 /* Read a partial die corresponding to a Fortran module. */
9001 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
9002 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
9004 /* Add a symbol for the namespace. */
9006 add_partial_symbol (pdi
, cu
);
9008 /* Now scan partial symbols in that module. */
9010 if (pdi
->has_children
)
9011 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9014 /* Read a partial die corresponding to a subprogram or an inlined
9015 subprogram and create a partial symbol for that subprogram.
9016 When the CU language allows it, this routine also defines a partial
9017 symbol for each nested subprogram that this subprogram contains.
9018 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
9019 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
9021 PDI may also be a lexical block, in which case we simply search
9022 recursively for subprograms defined inside that lexical block.
9023 Again, this is only performed when the CU language allows this
9024 type of definitions. */
9027 add_partial_subprogram (struct partial_die_info
*pdi
,
9028 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9029 int set_addrmap
, struct dwarf2_cu
*cu
)
9031 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
9033 if (pdi
->has_pc_info
)
9035 if (pdi
->lowpc
< *lowpc
)
9036 *lowpc
= pdi
->lowpc
;
9037 if (pdi
->highpc
> *highpc
)
9038 *highpc
= pdi
->highpc
;
9041 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9042 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9047 baseaddr
= ANOFFSET (objfile
->section_offsets
,
9048 SECT_OFF_TEXT (objfile
));
9049 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
9050 pdi
->lowpc
+ baseaddr
);
9051 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
9052 pdi
->highpc
+ baseaddr
);
9053 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
9054 cu
->per_cu
->v
.psymtab
);
9058 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
9060 if (!pdi
->is_declaration
)
9061 /* Ignore subprogram DIEs that do not have a name, they are
9062 illegal. Do not emit a complaint at this point, we will
9063 do so when we convert this psymtab into a symtab. */
9065 add_partial_symbol (pdi
, cu
);
9069 if (! pdi
->has_children
)
9072 if (cu
->language
== language_ada
)
9074 pdi
= pdi
->die_child
;
9078 if (pdi
->tag
== DW_TAG_subprogram
9079 || pdi
->tag
== DW_TAG_inlined_subroutine
9080 || pdi
->tag
== DW_TAG_lexical_block
)
9081 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
9082 pdi
= pdi
->die_sibling
;
9087 /* Read a partial die corresponding to an enumeration type. */
9090 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
9091 struct dwarf2_cu
*cu
)
9093 struct partial_die_info
*pdi
;
9095 if (enum_pdi
->name
!= NULL
)
9096 add_partial_symbol (enum_pdi
, cu
);
9098 pdi
= enum_pdi
->die_child
;
9101 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
9102 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
9104 add_partial_symbol (pdi
, cu
);
9105 pdi
= pdi
->die_sibling
;
9109 /* Return the initial uleb128 in the die at INFO_PTR. */
9112 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
9114 unsigned int bytes_read
;
9116 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9119 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
9120 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
9122 Return the corresponding abbrev, or NULL if the number is zero (indicating
9123 an empty DIE). In either case *BYTES_READ will be set to the length of
9124 the initial number. */
9126 static struct abbrev_info
*
9127 peek_die_abbrev (const die_reader_specs
&reader
,
9128 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
9130 dwarf2_cu
*cu
= reader
.cu
;
9131 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
9132 unsigned int abbrev_number
9133 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
9135 if (abbrev_number
== 0)
9138 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
9141 error (_("Dwarf Error: Could not find abbrev number %d in %s"
9142 " at offset %s [in module %s]"),
9143 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
9144 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
9150 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9151 Returns a pointer to the end of a series of DIEs, terminated by an empty
9152 DIE. Any children of the skipped DIEs will also be skipped. */
9154 static const gdb_byte
*
9155 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
9159 unsigned int bytes_read
;
9160 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
9163 return info_ptr
+ bytes_read
;
9165 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
9169 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9170 INFO_PTR should point just after the initial uleb128 of a DIE, and the
9171 abbrev corresponding to that skipped uleb128 should be passed in
9172 ABBREV. Returns a pointer to this DIE's sibling, skipping any
9175 static const gdb_byte
*
9176 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
9177 struct abbrev_info
*abbrev
)
9179 unsigned int bytes_read
;
9180 struct attribute attr
;
9181 bfd
*abfd
= reader
->abfd
;
9182 struct dwarf2_cu
*cu
= reader
->cu
;
9183 const gdb_byte
*buffer
= reader
->buffer
;
9184 const gdb_byte
*buffer_end
= reader
->buffer_end
;
9185 unsigned int form
, i
;
9187 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
9189 /* The only abbrev we care about is DW_AT_sibling. */
9190 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
9192 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
9193 if (attr
.form
== DW_FORM_ref_addr
)
9194 complaint (&symfile_complaints
,
9195 _("ignoring absolute DW_AT_sibling"));
9198 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
9199 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
9201 if (sibling_ptr
< info_ptr
)
9202 complaint (&symfile_complaints
,
9203 _("DW_AT_sibling points backwards"));
9204 else if (sibling_ptr
> reader
->buffer_end
)
9205 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
9211 /* If it isn't DW_AT_sibling, skip this attribute. */
9212 form
= abbrev
->attrs
[i
].form
;
9216 case DW_FORM_ref_addr
:
9217 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
9218 and later it is offset sized. */
9219 if (cu
->header
.version
== 2)
9220 info_ptr
+= cu
->header
.addr_size
;
9222 info_ptr
+= cu
->header
.offset_size
;
9224 case DW_FORM_GNU_ref_alt
:
9225 info_ptr
+= cu
->header
.offset_size
;
9228 info_ptr
+= cu
->header
.addr_size
;
9235 case DW_FORM_flag_present
:
9236 case DW_FORM_implicit_const
:
9248 case DW_FORM_ref_sig8
:
9251 case DW_FORM_data16
:
9254 case DW_FORM_string
:
9255 read_direct_string (abfd
, info_ptr
, &bytes_read
);
9256 info_ptr
+= bytes_read
;
9258 case DW_FORM_sec_offset
:
9260 case DW_FORM_GNU_strp_alt
:
9261 info_ptr
+= cu
->header
.offset_size
;
9263 case DW_FORM_exprloc
:
9265 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9266 info_ptr
+= bytes_read
;
9268 case DW_FORM_block1
:
9269 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
9271 case DW_FORM_block2
:
9272 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
9274 case DW_FORM_block4
:
9275 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
9279 case DW_FORM_ref_udata
:
9280 case DW_FORM_GNU_addr_index
:
9281 case DW_FORM_GNU_str_index
:
9282 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
9284 case DW_FORM_indirect
:
9285 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9286 info_ptr
+= bytes_read
;
9287 /* We need to continue parsing from here, so just go back to
9289 goto skip_attribute
;
9292 error (_("Dwarf Error: Cannot handle %s "
9293 "in DWARF reader [in module %s]"),
9294 dwarf_form_name (form
),
9295 bfd_get_filename (abfd
));
9299 if (abbrev
->has_children
)
9300 return skip_children (reader
, info_ptr
);
9305 /* Locate ORIG_PDI's sibling.
9306 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
9308 static const gdb_byte
*
9309 locate_pdi_sibling (const struct die_reader_specs
*reader
,
9310 struct partial_die_info
*orig_pdi
,
9311 const gdb_byte
*info_ptr
)
9313 /* Do we know the sibling already? */
9315 if (orig_pdi
->sibling
)
9316 return orig_pdi
->sibling
;
9318 /* Are there any children to deal with? */
9320 if (!orig_pdi
->has_children
)
9323 /* Skip the children the long way. */
9325 return skip_children (reader
, info_ptr
);
9328 /* Expand this partial symbol table into a full symbol table. SELF is
9332 dwarf2_read_symtab (struct partial_symtab
*self
,
9333 struct objfile
*objfile
)
9335 struct dwarf2_per_objfile
*dwarf2_per_objfile
9336 = get_dwarf2_per_objfile (objfile
);
9340 warning (_("bug: psymtab for %s is already read in."),
9347 printf_filtered (_("Reading in symbols for %s..."),
9349 gdb_flush (gdb_stdout
);
9352 /* If this psymtab is constructed from a debug-only objfile, the
9353 has_section_at_zero flag will not necessarily be correct. We
9354 can get the correct value for this flag by looking at the data
9355 associated with the (presumably stripped) associated objfile. */
9356 if (objfile
->separate_debug_objfile_backlink
)
9358 struct dwarf2_per_objfile
*dpo_backlink
9359 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
9361 dwarf2_per_objfile
->has_section_at_zero
9362 = dpo_backlink
->has_section_at_zero
;
9365 dwarf2_per_objfile
->reading_partial_symbols
= 0;
9367 psymtab_to_symtab_1 (self
);
9369 /* Finish up the debug error message. */
9371 printf_filtered (_("done.\n"));
9374 process_cu_includes (dwarf2_per_objfile
);
9377 /* Reading in full CUs. */
9379 /* Add PER_CU to the queue. */
9382 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9383 enum language pretend_language
)
9385 struct dwarf2_queue_item
*item
;
9388 item
= XNEW (struct dwarf2_queue_item
);
9389 item
->per_cu
= per_cu
;
9390 item
->pretend_language
= pretend_language
;
9393 if (dwarf2_queue
== NULL
)
9394 dwarf2_queue
= item
;
9396 dwarf2_queue_tail
->next
= item
;
9398 dwarf2_queue_tail
= item
;
9401 /* If PER_CU is not yet queued, add it to the queue.
9402 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
9404 The result is non-zero if PER_CU was queued, otherwise the result is zero
9405 meaning either PER_CU is already queued or it is already loaded.
9407 N.B. There is an invariant here that if a CU is queued then it is loaded.
9408 The caller is required to load PER_CU if we return non-zero. */
9411 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
9412 struct dwarf2_per_cu_data
*per_cu
,
9413 enum language pretend_language
)
9415 /* We may arrive here during partial symbol reading, if we need full
9416 DIEs to process an unusual case (e.g. template arguments). Do
9417 not queue PER_CU, just tell our caller to load its DIEs. */
9418 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
9420 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
9425 /* Mark the dependence relation so that we don't flush PER_CU
9427 if (dependent_cu
!= NULL
)
9428 dwarf2_add_dependence (dependent_cu
, per_cu
);
9430 /* If it's already on the queue, we have nothing to do. */
9434 /* If the compilation unit is already loaded, just mark it as
9436 if (per_cu
->cu
!= NULL
)
9438 per_cu
->cu
->last_used
= 0;
9442 /* Add it to the queue. */
9443 queue_comp_unit (per_cu
, pretend_language
);
9448 /* Process the queue. */
9451 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9453 struct dwarf2_queue_item
*item
, *next_item
;
9455 if (dwarf_read_debug
)
9457 fprintf_unfiltered (gdb_stdlog
,
9458 "Expanding one or more symtabs of objfile %s ...\n",
9459 objfile_name (dwarf2_per_objfile
->objfile
));
9462 /* The queue starts out with one item, but following a DIE reference
9463 may load a new CU, adding it to the end of the queue. */
9464 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
9466 if ((dwarf2_per_objfile
->using_index
9467 ? !item
->per_cu
->v
.quick
->compunit_symtab
9468 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
9469 /* Skip dummy CUs. */
9470 && item
->per_cu
->cu
!= NULL
)
9472 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
9473 unsigned int debug_print_threshold
;
9476 if (per_cu
->is_debug_types
)
9478 struct signatured_type
*sig_type
=
9479 (struct signatured_type
*) per_cu
;
9481 sprintf (buf
, "TU %s at offset %s",
9482 hex_string (sig_type
->signature
),
9483 sect_offset_str (per_cu
->sect_off
));
9484 /* There can be 100s of TUs.
9485 Only print them in verbose mode. */
9486 debug_print_threshold
= 2;
9490 sprintf (buf
, "CU at offset %s",
9491 sect_offset_str (per_cu
->sect_off
));
9492 debug_print_threshold
= 1;
9495 if (dwarf_read_debug
>= debug_print_threshold
)
9496 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
9498 if (per_cu
->is_debug_types
)
9499 process_full_type_unit (per_cu
, item
->pretend_language
);
9501 process_full_comp_unit (per_cu
, item
->pretend_language
);
9503 if (dwarf_read_debug
>= debug_print_threshold
)
9504 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
9507 item
->per_cu
->queued
= 0;
9508 next_item
= item
->next
;
9512 dwarf2_queue_tail
= NULL
;
9514 if (dwarf_read_debug
)
9516 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
9517 objfile_name (dwarf2_per_objfile
->objfile
));
9521 /* Read in full symbols for PST, and anything it depends on. */
9524 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
9526 struct dwarf2_per_cu_data
*per_cu
;
9532 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
9533 if (!pst
->dependencies
[i
]->readin
9534 && pst
->dependencies
[i
]->user
== NULL
)
9536 /* Inform about additional files that need to be read in. */
9539 /* FIXME: i18n: Need to make this a single string. */
9540 fputs_filtered (" ", gdb_stdout
);
9542 fputs_filtered ("and ", gdb_stdout
);
9544 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
9545 wrap_here (""); /* Flush output. */
9546 gdb_flush (gdb_stdout
);
9548 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
9551 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
9555 /* It's an include file, no symbols to read for it.
9556 Everything is in the parent symtab. */
9561 dw2_do_instantiate_symtab (per_cu
);
9564 /* Trivial hash function for die_info: the hash value of a DIE
9565 is its offset in .debug_info for this objfile. */
9568 die_hash (const void *item
)
9570 const struct die_info
*die
= (const struct die_info
*) item
;
9572 return to_underlying (die
->sect_off
);
9575 /* Trivial comparison function for die_info structures: two DIEs
9576 are equal if they have the same offset. */
9579 die_eq (const void *item_lhs
, const void *item_rhs
)
9581 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9582 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9584 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9587 /* die_reader_func for load_full_comp_unit.
9588 This is identical to read_signatured_type_reader,
9589 but is kept separate for now. */
9592 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
9593 const gdb_byte
*info_ptr
,
9594 struct die_info
*comp_unit_die
,
9598 struct dwarf2_cu
*cu
= reader
->cu
;
9599 enum language
*language_ptr
= (enum language
*) data
;
9601 gdb_assert (cu
->die_hash
== NULL
);
9603 htab_create_alloc_ex (cu
->header
.length
/ 12,
9607 &cu
->comp_unit_obstack
,
9608 hashtab_obstack_allocate
,
9609 dummy_obstack_deallocate
);
9612 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
9613 &info_ptr
, comp_unit_die
);
9614 cu
->dies
= comp_unit_die
;
9615 /* comp_unit_die is not stored in die_hash, no need. */
9617 /* We try not to read any attributes in this function, because not
9618 all CUs needed for references have been loaded yet, and symbol
9619 table processing isn't initialized. But we have to set the CU language,
9620 or we won't be able to build types correctly.
9621 Similarly, if we do not read the producer, we can not apply
9622 producer-specific interpretation. */
9623 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
9626 /* Load the DIEs associated with PER_CU into memory. */
9629 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9630 enum language pretend_language
)
9632 gdb_assert (! this_cu
->is_debug_types
);
9634 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
9635 load_full_comp_unit_reader
, &pretend_language
);
9638 /* Add a DIE to the delayed physname list. */
9641 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9642 const char *name
, struct die_info
*die
,
9643 struct dwarf2_cu
*cu
)
9645 struct delayed_method_info mi
;
9647 mi
.fnfield_index
= fnfield_index
;
9651 cu
->method_list
.push_back (mi
);
9654 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9655 "const" / "volatile". If so, decrements LEN by the length of the
9656 modifier and return true. Otherwise return false. */
9660 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9662 size_t mod_len
= sizeof (mod
) - 1;
9663 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9671 /* Compute the physnames of any methods on the CU's method list.
9673 The computation of method physnames is delayed in order to avoid the
9674 (bad) condition that one of the method's formal parameters is of an as yet
9678 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9680 /* Only C++ delays computing physnames. */
9681 if (cu
->method_list
.empty ())
9683 gdb_assert (cu
->language
== language_cplus
);
9685 for (struct delayed_method_info
&mi
: cu
->method_list
)
9687 const char *physname
;
9688 struct fn_fieldlist
*fn_flp
9689 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9690 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9691 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9692 = physname
? physname
: "";
9694 /* Since there's no tag to indicate whether a method is a
9695 const/volatile overload, extract that information out of the
9697 if (physname
!= NULL
)
9699 size_t len
= strlen (physname
);
9703 if (physname
[len
] == ')') /* shortcut */
9705 else if (check_modifier (physname
, len
, " const"))
9706 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9707 else if (check_modifier (physname
, len
, " volatile"))
9708 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9715 /* The list is no longer needed. */
9716 cu
->method_list
.clear ();
9719 /* Go objects should be embedded in a DW_TAG_module DIE,
9720 and it's not clear if/how imported objects will appear.
9721 To keep Go support simple until that's worked out,
9722 go back through what we've read and create something usable.
9723 We could do this while processing each DIE, and feels kinda cleaner,
9724 but that way is more invasive.
9725 This is to, for example, allow the user to type "p var" or "b main"
9726 without having to specify the package name, and allow lookups
9727 of module.object to work in contexts that use the expression
9731 fixup_go_packaging (struct dwarf2_cu
*cu
)
9733 char *package_name
= NULL
;
9734 struct pending
*list
;
9737 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
9739 for (i
= 0; i
< list
->nsyms
; ++i
)
9741 struct symbol
*sym
= list
->symbol
[i
];
9743 if (SYMBOL_LANGUAGE (sym
) == language_go
9744 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9746 char *this_package_name
= go_symbol_package_name (sym
);
9748 if (this_package_name
== NULL
)
9750 if (package_name
== NULL
)
9751 package_name
= this_package_name
;
9754 struct objfile
*objfile
9755 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9756 if (strcmp (package_name
, this_package_name
) != 0)
9757 complaint (&symfile_complaints
,
9758 _("Symtab %s has objects from two different Go packages: %s and %s"),
9759 (symbol_symtab (sym
) != NULL
9760 ? symtab_to_filename_for_display
9761 (symbol_symtab (sym
))
9762 : objfile_name (objfile
)),
9763 this_package_name
, package_name
);
9764 xfree (this_package_name
);
9770 if (package_name
!= NULL
)
9772 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9773 const char *saved_package_name
9774 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
9776 strlen (package_name
));
9777 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9778 saved_package_name
);
9781 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
9783 sym
= allocate_symbol (objfile
);
9784 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
9785 SYMBOL_SET_NAMES (sym
, saved_package_name
,
9786 strlen (saved_package_name
), 0, objfile
);
9787 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9788 e.g., "main" finds the "main" module and not C's main(). */
9789 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9790 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9791 SYMBOL_TYPE (sym
) = type
;
9793 add_symbol_to_list (sym
, &global_symbols
);
9795 xfree (package_name
);
9799 /* Allocate a fully-qualified name consisting of the two parts on the
9803 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9805 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9808 /* A helper that allocates a struct discriminant_info to attach to a
9811 static struct discriminant_info
*
9812 alloc_discriminant_info (struct type
*type
, int discriminant_index
,
9815 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9816 gdb_assert (discriminant_index
== -1
9817 || (discriminant_index
>= 0
9818 && discriminant_index
< TYPE_NFIELDS (type
)));
9819 gdb_assert (default_index
== -1
9820 || (default_index
>= 0 && default_index
< TYPE_NFIELDS (type
)));
9822 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
9824 struct discriminant_info
*disc
9825 = ((struct discriminant_info
*)
9827 offsetof (struct discriminant_info
, discriminants
)
9828 + TYPE_NFIELDS (type
) * sizeof (disc
->discriminants
[0])));
9829 disc
->default_index
= default_index
;
9830 disc
->discriminant_index
= discriminant_index
;
9832 struct dynamic_prop prop
;
9833 prop
.kind
= PROP_UNDEFINED
;
9834 prop
.data
.baton
= disc
;
9836 add_dyn_prop (DYN_PROP_DISCRIMINATED
, prop
, type
);
9841 /* Some versions of rustc emitted enums in an unusual way.
9843 Ordinary enums were emitted as unions. The first element of each
9844 structure in the union was named "RUST$ENUM$DISR". This element
9845 held the discriminant.
9847 These versions of Rust also implemented the "non-zero"
9848 optimization. When the enum had two values, and one is empty and
9849 the other holds a pointer that cannot be zero, the pointer is used
9850 as the discriminant, with a zero value meaning the empty variant.
9851 Here, the union's first member is of the form
9852 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9853 where the fieldnos are the indices of the fields that should be
9854 traversed in order to find the field (which may be several fields deep)
9855 and the variantname is the name of the variant of the case when the
9858 This function recognizes whether TYPE is of one of these forms,
9859 and, if so, smashes it to be a variant type. */
9862 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9864 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9866 /* We don't need to deal with empty enums. */
9867 if (TYPE_NFIELDS (type
) == 0)
9870 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9871 if (TYPE_NFIELDS (type
) == 1
9872 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9874 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9876 /* Decode the field name to find the offset of the
9878 ULONGEST bit_offset
= 0;
9879 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9880 while (name
[0] >= '0' && name
[0] <= '9')
9883 unsigned long index
= strtoul (name
, &tail
, 10);
9886 || index
>= TYPE_NFIELDS (field_type
)
9887 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9888 != FIELD_LOC_KIND_BITPOS
))
9890 complaint (&symfile_complaints
,
9891 _("Could not parse Rust enum encoding string \"%s\""
9893 TYPE_FIELD_NAME (type
, 0),
9894 objfile_name (objfile
));
9899 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9900 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9903 /* Make a union to hold the variants. */
9904 struct type
*union_type
= alloc_type (objfile
);
9905 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9906 TYPE_NFIELDS (union_type
) = 3;
9907 TYPE_FIELDS (union_type
)
9908 = (struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
));
9909 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9911 /* Put the discriminant must at index 0. */
9912 TYPE_FIELD_TYPE (union_type
, 0) = field_type
;
9913 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
9914 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
9915 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 0), bit_offset
);
9917 /* The order of fields doesn't really matter, so put the real
9918 field at index 1 and the data-less field at index 2. */
9919 struct discriminant_info
*disc
9920 = alloc_discriminant_info (union_type
, 0, 1);
9921 TYPE_FIELD (union_type
, 1) = TYPE_FIELD (type
, 0);
9922 TYPE_FIELD_NAME (union_type
, 1)
9923 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1)));
9924 TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1))
9925 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9926 TYPE_FIELD_NAME (union_type
, 1));
9928 const char *dataless_name
9929 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9931 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9933 TYPE_FIELD_TYPE (union_type
, 2) = dataless_type
;
9934 /* NAME points into the original discriminant name, which
9935 already has the correct lifetime. */
9936 TYPE_FIELD_NAME (union_type
, 2) = name
;
9937 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 2), 0);
9938 disc
->discriminants
[2] = 0;
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
;
9943 TYPE_NFIELDS (type
) = 1;
9945 = (struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
));
9947 /* Install the variant part. */
9948 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9949 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9950 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
9952 else if (TYPE_NFIELDS (type
) == 1)
9954 /* We assume that a union with a single field is a univariant
9956 /* Smash this type to be a structure type. We have to do this
9957 because the type has already been recorded. */
9958 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9960 /* Make a union to hold the variants. */
9961 struct type
*union_type
= alloc_type (objfile
);
9962 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9963 TYPE_NFIELDS (union_type
) = TYPE_NFIELDS (type
);
9964 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9965 TYPE_FIELDS (union_type
) = TYPE_FIELDS (type
);
9967 struct type
*field_type
= TYPE_FIELD_TYPE (union_type
, 0);
9968 const char *variant_name
9969 = rust_last_path_segment (TYPE_NAME (field_type
));
9970 TYPE_FIELD_NAME (union_type
, 0) = variant_name
;
9971 TYPE_NAME (field_type
)
9972 = rust_fully_qualify (&objfile
->objfile_obstack
,
9973 TYPE_NAME (type
), variant_name
);
9975 /* Install the union in the outer struct type. */
9976 TYPE_NFIELDS (type
) = 1;
9978 = (struct field
*) TYPE_ZALLOC (union_type
, sizeof (struct field
));
9979 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9980 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
9981 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9983 alloc_discriminant_info (union_type
, -1, 0);
9987 struct type
*disr_type
= nullptr;
9988 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
9990 disr_type
= TYPE_FIELD_TYPE (type
, i
);
9992 if (TYPE_NFIELDS (disr_type
) == 0)
9994 /* Could be data-less variant, so keep going. */
9996 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
9997 "RUST$ENUM$DISR") != 0)
9999 /* Not a Rust enum. */
10009 /* If we got here without a discriminant, then it's probably
10011 if (disr_type
== nullptr)
10014 /* Smash this type to be a structure type. We have to do this
10015 because the type has already been recorded. */
10016 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10018 /* Make a union to hold the variants. */
10019 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
10020 struct type
*union_type
= alloc_type (objfile
);
10021 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10022 TYPE_NFIELDS (union_type
) = 1 + TYPE_NFIELDS (type
);
10023 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10024 TYPE_FIELDS (union_type
)
10025 = (struct field
*) TYPE_ZALLOC (union_type
,
10026 (TYPE_NFIELDS (union_type
)
10027 * sizeof (struct field
)));
10029 memcpy (TYPE_FIELDS (union_type
) + 1, TYPE_FIELDS (type
),
10030 TYPE_NFIELDS (type
) * sizeof (struct field
));
10032 /* Install the discriminant at index 0 in the union. */
10033 TYPE_FIELD (union_type
, 0) = *disr_field
;
10034 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
10035 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
10037 /* Install the union in the outer struct type. */
10038 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10039 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10040 TYPE_NFIELDS (type
) = 1;
10042 /* Set the size and offset of the union type. */
10043 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10045 /* We need a way to find the correct discriminant given a
10046 variant name. For convenience we build a map here. */
10047 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
10048 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
10049 for (int i
= 0; i
< TYPE_NFIELDS (enum_type
); ++i
)
10051 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
10054 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
10055 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
10059 int n_fields
= TYPE_NFIELDS (union_type
);
10060 struct discriminant_info
*disc
10061 = alloc_discriminant_info (union_type
, 0, -1);
10062 /* Skip the discriminant here. */
10063 for (int i
= 1; i
< n_fields
; ++i
)
10065 /* Find the final word in the name of this variant's type.
10066 That name can be used to look up the correct
10068 const char *variant_name
10069 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
,
10072 auto iter
= discriminant_map
.find (variant_name
);
10073 if (iter
!= discriminant_map
.end ())
10074 disc
->discriminants
[i
] = iter
->second
;
10076 /* Remove the discriminant field. */
10077 struct type
*sub_type
= TYPE_FIELD_TYPE (union_type
, i
);
10078 --TYPE_NFIELDS (sub_type
);
10079 ++TYPE_FIELDS (sub_type
);
10080 TYPE_FIELD_NAME (union_type
, i
) = variant_name
;
10081 TYPE_NAME (sub_type
)
10082 = rust_fully_qualify (&objfile
->objfile_obstack
,
10083 TYPE_NAME (type
), variant_name
);
10088 /* Rewrite some Rust unions to be structures with variants parts. */
10091 rust_union_quirks (struct dwarf2_cu
*cu
)
10093 gdb_assert (cu
->language
== language_rust
);
10094 for (struct type
*type
: cu
->rust_unions
)
10095 quirk_rust_enum (type
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
10098 /* Return the symtab for PER_CU. This works properly regardless of
10099 whether we're using the index or psymtabs. */
10101 static struct compunit_symtab
*
10102 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
10104 return (per_cu
->dwarf2_per_objfile
->using_index
10105 ? per_cu
->v
.quick
->compunit_symtab
10106 : per_cu
->v
.psymtab
->compunit_symtab
);
10109 /* A helper function for computing the list of all symbol tables
10110 included by PER_CU. */
10113 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
10114 htab_t all_children
, htab_t all_type_symtabs
,
10115 struct dwarf2_per_cu_data
*per_cu
,
10116 struct compunit_symtab
*immediate_parent
)
10120 struct compunit_symtab
*cust
;
10121 struct dwarf2_per_cu_data
*iter
;
10123 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
10126 /* This inclusion and its children have been processed. */
10131 /* Only add a CU if it has a symbol table. */
10132 cust
= get_compunit_symtab (per_cu
);
10135 /* If this is a type unit only add its symbol table if we haven't
10136 seen it yet (type unit per_cu's can share symtabs). */
10137 if (per_cu
->is_debug_types
)
10139 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
10143 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
10144 if (cust
->user
== NULL
)
10145 cust
->user
= immediate_parent
;
10150 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
10151 if (cust
->user
== NULL
)
10152 cust
->user
= immediate_parent
;
10157 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
10160 recursively_compute_inclusions (result
, all_children
,
10161 all_type_symtabs
, iter
, cust
);
10165 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
10169 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
10171 gdb_assert (! per_cu
->is_debug_types
);
10173 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
10176 struct dwarf2_per_cu_data
*per_cu_iter
;
10177 struct compunit_symtab
*compunit_symtab_iter
;
10178 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
10179 htab_t all_children
, all_type_symtabs
;
10180 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
10182 /* If we don't have a symtab, we can just skip this case. */
10186 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10187 NULL
, xcalloc
, xfree
);
10188 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10189 NULL
, xcalloc
, xfree
);
10192 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
10196 recursively_compute_inclusions (&result_symtabs
, all_children
,
10197 all_type_symtabs
, per_cu_iter
,
10201 /* Now we have a transitive closure of all the included symtabs. */
10202 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
10204 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
10205 struct compunit_symtab
*, len
+ 1);
10207 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
10208 compunit_symtab_iter
);
10210 cust
->includes
[ix
] = compunit_symtab_iter
;
10211 cust
->includes
[len
] = NULL
;
10213 VEC_free (compunit_symtab_ptr
, result_symtabs
);
10214 htab_delete (all_children
);
10215 htab_delete (all_type_symtabs
);
10219 /* Compute the 'includes' field for the symtabs of all the CUs we just
10223 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
10226 struct dwarf2_per_cu_data
*iter
;
10229 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
10233 if (! iter
->is_debug_types
)
10234 compute_compunit_symtab_includes (iter
);
10237 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
10240 /* Generate full symbol information for PER_CU, whose DIEs have
10241 already been loaded into memory. */
10244 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
10245 enum language pretend_language
)
10247 struct dwarf2_cu
*cu
= per_cu
->cu
;
10248 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10249 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10250 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10251 CORE_ADDR lowpc
, highpc
;
10252 struct compunit_symtab
*cust
;
10253 CORE_ADDR baseaddr
;
10254 struct block
*static_block
;
10257 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10260 scoped_free_pendings free_pending
;
10262 /* Clear the list here in case something was left over. */
10263 cu
->method_list
.clear ();
10265 cu
->list_in_scope
= &file_symbols
;
10267 cu
->language
= pretend_language
;
10268 cu
->language_defn
= language_def (cu
->language
);
10270 /* Do line number decoding in read_file_scope () */
10271 process_die (cu
->dies
, cu
);
10273 /* For now fudge the Go package. */
10274 if (cu
->language
== language_go
)
10275 fixup_go_packaging (cu
);
10277 /* Now that we have processed all the DIEs in the CU, all the types
10278 should be complete, and it should now be safe to compute all of the
10280 compute_delayed_physnames (cu
);
10282 if (cu
->language
== language_rust
)
10283 rust_union_quirks (cu
);
10285 /* Some compilers don't define a DW_AT_high_pc attribute for the
10286 compilation unit. If the DW_AT_high_pc is missing, synthesize
10287 it, by scanning the DIE's below the compilation unit. */
10288 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
10290 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
10291 static_block
= end_symtab_get_static_block (addr
, 0, 1);
10293 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
10294 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
10295 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
10296 addrmap to help ensure it has an accurate map of pc values belonging to
10298 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
10300 cust
= end_symtab_from_static_block (static_block
,
10301 SECT_OFF_TEXT (objfile
), 0);
10305 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
10307 /* Set symtab language to language from DW_AT_language. If the
10308 compilation is from a C file generated by language preprocessors, do
10309 not set the language if it was already deduced by start_subfile. */
10310 if (!(cu
->language
== language_c
10311 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
10312 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10314 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
10315 produce DW_AT_location with location lists but it can be possibly
10316 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
10317 there were bugs in prologue debug info, fixed later in GCC-4.5
10318 by "unwind info for epilogues" patch (which is not directly related).
10320 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
10321 needed, it would be wrong due to missing DW_AT_producer there.
10323 Still one can confuse GDB by using non-standard GCC compilation
10324 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
10326 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
10327 cust
->locations_valid
= 1;
10329 if (gcc_4_minor
>= 5)
10330 cust
->epilogue_unwind_valid
= 1;
10332 cust
->call_site_htab
= cu
->call_site_htab
;
10335 if (dwarf2_per_objfile
->using_index
)
10336 per_cu
->v
.quick
->compunit_symtab
= cust
;
10339 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10340 pst
->compunit_symtab
= cust
;
10344 /* Push it for inclusion processing later. */
10345 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
10348 /* Generate full symbol information for type unit PER_CU, whose DIEs have
10349 already been loaded into memory. */
10352 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
10353 enum language pretend_language
)
10355 struct dwarf2_cu
*cu
= per_cu
->cu
;
10356 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10357 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10358 struct compunit_symtab
*cust
;
10359 struct signatured_type
*sig_type
;
10361 gdb_assert (per_cu
->is_debug_types
);
10362 sig_type
= (struct signatured_type
*) per_cu
;
10365 scoped_free_pendings free_pending
;
10367 /* Clear the list here in case something was left over. */
10368 cu
->method_list
.clear ();
10370 cu
->list_in_scope
= &file_symbols
;
10372 cu
->language
= pretend_language
;
10373 cu
->language_defn
= language_def (cu
->language
);
10375 /* The symbol tables are set up in read_type_unit_scope. */
10376 process_die (cu
->dies
, cu
);
10378 /* For now fudge the Go package. */
10379 if (cu
->language
== language_go
)
10380 fixup_go_packaging (cu
);
10382 /* Now that we have processed all the DIEs in the CU, all the types
10383 should be complete, and it should now be safe to compute all of the
10385 compute_delayed_physnames (cu
);
10387 if (cu
->language
== language_rust
)
10388 rust_union_quirks (cu
);
10390 /* TUs share symbol tables.
10391 If this is the first TU to use this symtab, complete the construction
10392 of it with end_expandable_symtab. Otherwise, complete the addition of
10393 this TU's symbols to the existing symtab. */
10394 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
10396 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
10397 sig_type
->type_unit_group
->compunit_symtab
= cust
;
10401 /* Set symtab language to language from DW_AT_language. If the
10402 compilation is from a C file generated by language preprocessors,
10403 do not set the language if it was already deduced by
10405 if (!(cu
->language
== language_c
10406 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
10407 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10412 augment_type_symtab ();
10413 cust
= sig_type
->type_unit_group
->compunit_symtab
;
10416 if (dwarf2_per_objfile
->using_index
)
10417 per_cu
->v
.quick
->compunit_symtab
= cust
;
10420 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10421 pst
->compunit_symtab
= cust
;
10426 /* Process an imported unit DIE. */
10429 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10431 struct attribute
*attr
;
10433 /* For now we don't handle imported units in type units. */
10434 if (cu
->per_cu
->is_debug_types
)
10436 error (_("Dwarf Error: DW_TAG_imported_unit is not"
10437 " supported in type units [in module %s]"),
10438 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
10441 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10444 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
10445 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
10446 dwarf2_per_cu_data
*per_cu
10447 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
10448 cu
->per_cu
->dwarf2_per_objfile
);
10450 /* If necessary, add it to the queue and load its DIEs. */
10451 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
10452 load_full_comp_unit (per_cu
, cu
->language
);
10454 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
10459 /* RAII object that represents a process_die scope: i.e.,
10460 starts/finishes processing a DIE. */
10461 class process_die_scope
10464 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
10465 : m_die (die
), m_cu (cu
)
10467 /* We should only be processing DIEs not already in process. */
10468 gdb_assert (!m_die
->in_process
);
10469 m_die
->in_process
= true;
10472 ~process_die_scope ()
10474 m_die
->in_process
= false;
10476 /* If we're done processing the DIE for the CU that owns the line
10477 header, we don't need the line header anymore. */
10478 if (m_cu
->line_header_die_owner
== m_die
)
10480 delete m_cu
->line_header
;
10481 m_cu
->line_header
= NULL
;
10482 m_cu
->line_header_die_owner
= NULL
;
10491 /* Process a die and its children. */
10494 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10496 process_die_scope
scope (die
, cu
);
10500 case DW_TAG_padding
:
10502 case DW_TAG_compile_unit
:
10503 case DW_TAG_partial_unit
:
10504 read_file_scope (die
, cu
);
10506 case DW_TAG_type_unit
:
10507 read_type_unit_scope (die
, cu
);
10509 case DW_TAG_subprogram
:
10510 case DW_TAG_inlined_subroutine
:
10511 read_func_scope (die
, cu
);
10513 case DW_TAG_lexical_block
:
10514 case DW_TAG_try_block
:
10515 case DW_TAG_catch_block
:
10516 read_lexical_block_scope (die
, cu
);
10518 case DW_TAG_call_site
:
10519 case DW_TAG_GNU_call_site
:
10520 read_call_site_scope (die
, cu
);
10522 case DW_TAG_class_type
:
10523 case DW_TAG_interface_type
:
10524 case DW_TAG_structure_type
:
10525 case DW_TAG_union_type
:
10526 process_structure_scope (die
, cu
);
10528 case DW_TAG_enumeration_type
:
10529 process_enumeration_scope (die
, cu
);
10532 /* These dies have a type, but processing them does not create
10533 a symbol or recurse to process the children. Therefore we can
10534 read them on-demand through read_type_die. */
10535 case DW_TAG_subroutine_type
:
10536 case DW_TAG_set_type
:
10537 case DW_TAG_array_type
:
10538 case DW_TAG_pointer_type
:
10539 case DW_TAG_ptr_to_member_type
:
10540 case DW_TAG_reference_type
:
10541 case DW_TAG_rvalue_reference_type
:
10542 case DW_TAG_string_type
:
10545 case DW_TAG_base_type
:
10546 case DW_TAG_subrange_type
:
10547 case DW_TAG_typedef
:
10548 /* Add a typedef symbol for the type definition, if it has a
10550 new_symbol (die
, read_type_die (die
, cu
), cu
);
10552 case DW_TAG_common_block
:
10553 read_common_block (die
, cu
);
10555 case DW_TAG_common_inclusion
:
10557 case DW_TAG_namespace
:
10558 cu
->processing_has_namespace_info
= 1;
10559 read_namespace (die
, cu
);
10561 case DW_TAG_module
:
10562 cu
->processing_has_namespace_info
= 1;
10563 read_module (die
, cu
);
10565 case DW_TAG_imported_declaration
:
10566 cu
->processing_has_namespace_info
= 1;
10567 if (read_namespace_alias (die
, cu
))
10569 /* The declaration is not a global namespace alias: fall through. */
10570 case DW_TAG_imported_module
:
10571 cu
->processing_has_namespace_info
= 1;
10572 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10573 || cu
->language
!= language_fortran
))
10574 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
10575 dwarf_tag_name (die
->tag
));
10576 read_import_statement (die
, cu
);
10579 case DW_TAG_imported_unit
:
10580 process_imported_unit_die (die
, cu
);
10583 case DW_TAG_variable
:
10584 read_variable (die
, cu
);
10588 new_symbol (die
, NULL
, cu
);
10593 /* DWARF name computation. */
10595 /* A helper function for dwarf2_compute_name which determines whether DIE
10596 needs to have the name of the scope prepended to the name listed in the
10600 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10602 struct attribute
*attr
;
10606 case DW_TAG_namespace
:
10607 case DW_TAG_typedef
:
10608 case DW_TAG_class_type
:
10609 case DW_TAG_interface_type
:
10610 case DW_TAG_structure_type
:
10611 case DW_TAG_union_type
:
10612 case DW_TAG_enumeration_type
:
10613 case DW_TAG_enumerator
:
10614 case DW_TAG_subprogram
:
10615 case DW_TAG_inlined_subroutine
:
10616 case DW_TAG_member
:
10617 case DW_TAG_imported_declaration
:
10620 case DW_TAG_variable
:
10621 case DW_TAG_constant
:
10622 /* We only need to prefix "globally" visible variables. These include
10623 any variable marked with DW_AT_external or any variable that
10624 lives in a namespace. [Variables in anonymous namespaces
10625 require prefixing, but they are not DW_AT_external.] */
10627 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10629 struct dwarf2_cu
*spec_cu
= cu
;
10631 return die_needs_namespace (die_specification (die
, &spec_cu
),
10635 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10636 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10637 && die
->parent
->tag
!= DW_TAG_module
)
10639 /* A variable in a lexical block of some kind does not need a
10640 namespace, even though in C++ such variables may be external
10641 and have a mangled name. */
10642 if (die
->parent
->tag
== DW_TAG_lexical_block
10643 || die
->parent
->tag
== DW_TAG_try_block
10644 || die
->parent
->tag
== DW_TAG_catch_block
10645 || die
->parent
->tag
== DW_TAG_subprogram
)
10654 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10655 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10656 defined for the given DIE. */
10658 static struct attribute
*
10659 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10661 struct attribute
*attr
;
10663 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10665 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10670 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10671 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10672 defined for the given DIE. */
10674 static const char *
10675 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10677 const char *linkage_name
;
10679 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10680 if (linkage_name
== NULL
)
10681 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10683 return linkage_name
;
10686 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10687 compute the physname for the object, which include a method's:
10688 - formal parameters (C++),
10689 - receiver type (Go),
10691 The term "physname" is a bit confusing.
10692 For C++, for example, it is the demangled name.
10693 For Go, for example, it's the mangled name.
10695 For Ada, return the DIE's linkage name rather than the fully qualified
10696 name. PHYSNAME is ignored..
10698 The result is allocated on the objfile_obstack and canonicalized. */
10700 static const char *
10701 dwarf2_compute_name (const char *name
,
10702 struct die_info
*die
, struct dwarf2_cu
*cu
,
10705 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10708 name
= dwarf2_name (die
, cu
);
10710 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10711 but otherwise compute it by typename_concat inside GDB.
10712 FIXME: Actually this is not really true, or at least not always true.
10713 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
10714 Fortran names because there is no mangling standard. So new_symbol
10715 will set the demangled name to the result of dwarf2_full_name, and it is
10716 the demangled name that GDB uses if it exists. */
10717 if (cu
->language
== language_ada
10718 || (cu
->language
== language_fortran
&& physname
))
10720 /* For Ada unit, we prefer the linkage name over the name, as
10721 the former contains the exported name, which the user expects
10722 to be able to reference. Ideally, we want the user to be able
10723 to reference this entity using either natural or linkage name,
10724 but we haven't started looking at this enhancement yet. */
10725 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10727 if (linkage_name
!= NULL
)
10728 return linkage_name
;
10731 /* These are the only languages we know how to qualify names in. */
10733 && (cu
->language
== language_cplus
10734 || cu
->language
== language_fortran
|| cu
->language
== language_d
10735 || cu
->language
== language_rust
))
10737 if (die_needs_namespace (die
, cu
))
10739 const char *prefix
;
10740 const char *canonical_name
= NULL
;
10744 prefix
= determine_prefix (die
, cu
);
10745 if (*prefix
!= '\0')
10747 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
10750 buf
.puts (prefixed_name
);
10751 xfree (prefixed_name
);
10756 /* Template parameters may be specified in the DIE's DW_AT_name, or
10757 as children with DW_TAG_template_type_param or
10758 DW_TAG_value_type_param. If the latter, add them to the name
10759 here. If the name already has template parameters, then
10760 skip this step; some versions of GCC emit both, and
10761 it is more efficient to use the pre-computed name.
10763 Something to keep in mind about this process: it is very
10764 unlikely, or in some cases downright impossible, to produce
10765 something that will match the mangled name of a function.
10766 If the definition of the function has the same debug info,
10767 we should be able to match up with it anyway. But fallbacks
10768 using the minimal symbol, for instance to find a method
10769 implemented in a stripped copy of libstdc++, will not work.
10770 If we do not have debug info for the definition, we will have to
10771 match them up some other way.
10773 When we do name matching there is a related problem with function
10774 templates; two instantiated function templates are allowed to
10775 differ only by their return types, which we do not add here. */
10777 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10779 struct attribute
*attr
;
10780 struct die_info
*child
;
10783 die
->building_fullname
= 1;
10785 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10789 const gdb_byte
*bytes
;
10790 struct dwarf2_locexpr_baton
*baton
;
10793 if (child
->tag
!= DW_TAG_template_type_param
10794 && child
->tag
!= DW_TAG_template_value_param
)
10805 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10808 complaint (&symfile_complaints
,
10809 _("template parameter missing DW_AT_type"));
10810 buf
.puts ("UNKNOWN_TYPE");
10813 type
= die_type (child
, cu
);
10815 if (child
->tag
== DW_TAG_template_type_param
)
10817 c_print_type (type
, "", &buf
, -1, 0, &type_print_raw_options
);
10821 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10824 complaint (&symfile_complaints
,
10825 _("template parameter missing "
10826 "DW_AT_const_value"));
10827 buf
.puts ("UNKNOWN_VALUE");
10831 dwarf2_const_value_attr (attr
, type
, name
,
10832 &cu
->comp_unit_obstack
, cu
,
10833 &value
, &bytes
, &baton
);
10835 if (TYPE_NOSIGN (type
))
10836 /* GDB prints characters as NUMBER 'CHAR'. If that's
10837 changed, this can use value_print instead. */
10838 c_printchar (value
, type
, &buf
);
10841 struct value_print_options opts
;
10844 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10848 else if (bytes
!= NULL
)
10850 v
= allocate_value (type
);
10851 memcpy (value_contents_writeable (v
), bytes
,
10852 TYPE_LENGTH (type
));
10855 v
= value_from_longest (type
, value
);
10857 /* Specify decimal so that we do not depend on
10859 get_formatted_print_options (&opts
, 'd');
10861 value_print (v
, &buf
, &opts
);
10866 die
->building_fullname
= 0;
10870 /* Close the argument list, with a space if necessary
10871 (nested templates). */
10872 if (!buf
.empty () && buf
.string ().back () == '>')
10879 /* For C++ methods, append formal parameter type
10880 information, if PHYSNAME. */
10882 if (physname
&& die
->tag
== DW_TAG_subprogram
10883 && cu
->language
== language_cplus
)
10885 struct type
*type
= read_type_die (die
, cu
);
10887 c_type_print_args (type
, &buf
, 1, cu
->language
,
10888 &type_print_raw_options
);
10890 if (cu
->language
== language_cplus
)
10892 /* Assume that an artificial first parameter is
10893 "this", but do not crash if it is not. RealView
10894 marks unnamed (and thus unused) parameters as
10895 artificial; there is no way to differentiate
10897 if (TYPE_NFIELDS (type
) > 0
10898 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10899 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
10900 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10902 buf
.puts (" const");
10906 const std::string
&intermediate_name
= buf
.string ();
10908 if (cu
->language
== language_cplus
)
10910 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10911 &objfile
->per_bfd
->storage_obstack
);
10913 /* If we only computed INTERMEDIATE_NAME, or if
10914 INTERMEDIATE_NAME is already canonical, then we need to
10915 copy it to the appropriate obstack. */
10916 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10917 name
= ((const char *)
10918 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
10919 intermediate_name
.c_str (),
10920 intermediate_name
.length ()));
10922 name
= canonical_name
;
10929 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10930 If scope qualifiers are appropriate they will be added. The result
10931 will be allocated on the storage_obstack, or NULL if the DIE does
10932 not have a name. NAME may either be from a previous call to
10933 dwarf2_name or NULL.
10935 The output string will be canonicalized (if C++). */
10937 static const char *
10938 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10940 return dwarf2_compute_name (name
, die
, cu
, 0);
10943 /* Construct a physname for the given DIE in CU. NAME may either be
10944 from a previous call to dwarf2_name or NULL. The result will be
10945 allocated on the objfile_objstack or NULL if the DIE does not have a
10948 The output string will be canonicalized (if C++). */
10950 static const char *
10951 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10953 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10954 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10957 /* In this case dwarf2_compute_name is just a shortcut not building anything
10959 if (!die_needs_namespace (die
, cu
))
10960 return dwarf2_compute_name (name
, die
, cu
, 1);
10962 mangled
= dw2_linkage_name (die
, cu
);
10964 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10965 See https://github.com/rust-lang/rust/issues/32925. */
10966 if (cu
->language
== language_rust
&& mangled
!= NULL
10967 && strchr (mangled
, '{') != NULL
)
10970 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
10972 gdb::unique_xmalloc_ptr
<char> demangled
;
10973 if (mangled
!= NULL
)
10976 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
10978 /* Do nothing (do not demangle the symbol name). */
10980 else if (cu
->language
== language_go
)
10982 /* This is a lie, but we already lie to the caller new_symbol.
10983 new_symbol assumes we return the mangled name.
10984 This just undoes that lie until things are cleaned up. */
10988 /* Use DMGL_RET_DROP for C++ template functions to suppress
10989 their return type. It is easier for GDB users to search
10990 for such functions as `name(params)' than `long name(params)'.
10991 In such case the minimal symbol names do not match the full
10992 symbol names but for template functions there is never a need
10993 to look up their definition from their declaration so
10994 the only disadvantage remains the minimal symbol variant
10995 `long name(params)' does not have the proper inferior type. */
10996 demangled
.reset (gdb_demangle (mangled
,
10997 (DMGL_PARAMS
| DMGL_ANSI
10998 | DMGL_RET_DROP
)));
11001 canon
= demangled
.get ();
11009 if (canon
== NULL
|| check_physname
)
11011 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
11013 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
11015 /* It may not mean a bug in GDB. The compiler could also
11016 compute DW_AT_linkage_name incorrectly. But in such case
11017 GDB would need to be bug-to-bug compatible. */
11019 complaint (&symfile_complaints
,
11020 _("Computed physname <%s> does not match demangled <%s> "
11021 "(from linkage <%s>) - DIE at %s [in module %s]"),
11022 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
11023 objfile_name (objfile
));
11025 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
11026 is available here - over computed PHYSNAME. It is safer
11027 against both buggy GDB and buggy compilers. */
11041 retval
= ((const char *)
11042 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
11043 retval
, strlen (retval
)));
11048 /* Inspect DIE in CU for a namespace alias. If one exists, record
11049 a new symbol for it.
11051 Returns 1 if a namespace alias was recorded, 0 otherwise. */
11054 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
11056 struct attribute
*attr
;
11058 /* If the die does not have a name, this is not a namespace
11060 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11064 struct die_info
*d
= die
;
11065 struct dwarf2_cu
*imported_cu
= cu
;
11067 /* If the compiler has nested DW_AT_imported_declaration DIEs,
11068 keep inspecting DIEs until we hit the underlying import. */
11069 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
11070 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
11072 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
11076 d
= follow_die_ref (d
, attr
, &imported_cu
);
11077 if (d
->tag
!= DW_TAG_imported_declaration
)
11081 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
11083 complaint (&symfile_complaints
,
11084 _("DIE at %s has too many recursively imported "
11085 "declarations"), sect_offset_str (d
->sect_off
));
11092 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
11094 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
11095 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
11097 /* This declaration is a global namespace alias. Add
11098 a symbol for it whose type is the aliased namespace. */
11099 new_symbol (die
, type
, cu
);
11108 /* Return the using directives repository (global or local?) to use in the
11109 current context for LANGUAGE.
11111 For Ada, imported declarations can materialize renamings, which *may* be
11112 global. However it is impossible (for now?) in DWARF to distinguish
11113 "external" imported declarations and "static" ones. As all imported
11114 declarations seem to be static in all other languages, make them all CU-wide
11115 global only in Ada. */
11117 static struct using_direct
**
11118 using_directives (enum language language
)
11120 if (language
== language_ada
&& context_stack_depth
== 0)
11121 return &global_using_directives
;
11123 return &local_using_directives
;
11126 /* Read the import statement specified by the given die and record it. */
11129 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
11131 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11132 struct attribute
*import_attr
;
11133 struct die_info
*imported_die
, *child_die
;
11134 struct dwarf2_cu
*imported_cu
;
11135 const char *imported_name
;
11136 const char *imported_name_prefix
;
11137 const char *canonical_name
;
11138 const char *import_alias
;
11139 const char *imported_declaration
= NULL
;
11140 const char *import_prefix
;
11141 std::vector
<const char *> excludes
;
11143 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
11144 if (import_attr
== NULL
)
11146 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
11147 dwarf_tag_name (die
->tag
));
11152 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
11153 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11154 if (imported_name
== NULL
)
11156 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
11158 The import in the following code:
11172 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
11173 <52> DW_AT_decl_file : 1
11174 <53> DW_AT_decl_line : 6
11175 <54> DW_AT_import : <0x75>
11176 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
11177 <59> DW_AT_name : B
11178 <5b> DW_AT_decl_file : 1
11179 <5c> DW_AT_decl_line : 2
11180 <5d> DW_AT_type : <0x6e>
11182 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
11183 <76> DW_AT_byte_size : 4
11184 <77> DW_AT_encoding : 5 (signed)
11186 imports the wrong die ( 0x75 instead of 0x58 ).
11187 This case will be ignored until the gcc bug is fixed. */
11191 /* Figure out the local name after import. */
11192 import_alias
= dwarf2_name (die
, cu
);
11194 /* Figure out where the statement is being imported to. */
11195 import_prefix
= determine_prefix (die
, cu
);
11197 /* Figure out what the scope of the imported die is and prepend it
11198 to the name of the imported die. */
11199 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
11201 if (imported_die
->tag
!= DW_TAG_namespace
11202 && imported_die
->tag
!= DW_TAG_module
)
11204 imported_declaration
= imported_name
;
11205 canonical_name
= imported_name_prefix
;
11207 else if (strlen (imported_name_prefix
) > 0)
11208 canonical_name
= obconcat (&objfile
->objfile_obstack
,
11209 imported_name_prefix
,
11210 (cu
->language
== language_d
? "." : "::"),
11211 imported_name
, (char *) NULL
);
11213 canonical_name
= imported_name
;
11215 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
11216 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11217 child_die
= sibling_die (child_die
))
11219 /* DWARF-4: A Fortran use statement with a “rename list” may be
11220 represented by an imported module entry with an import attribute
11221 referring to the module and owned entries corresponding to those
11222 entities that are renamed as part of being imported. */
11224 if (child_die
->tag
!= DW_TAG_imported_declaration
)
11226 complaint (&symfile_complaints
,
11227 _("child DW_TAG_imported_declaration expected "
11228 "- DIE at %s [in module %s]"),
11229 sect_offset_str (child_die
->sect_off
),
11230 objfile_name (objfile
));
11234 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
11235 if (import_attr
== NULL
)
11237 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
11238 dwarf_tag_name (child_die
->tag
));
11243 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
11245 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11246 if (imported_name
== NULL
)
11248 complaint (&symfile_complaints
,
11249 _("child DW_TAG_imported_declaration has unknown "
11250 "imported name - DIE at %s [in module %s]"),
11251 sect_offset_str (child_die
->sect_off
),
11252 objfile_name (objfile
));
11256 excludes
.push_back (imported_name
);
11258 process_die (child_die
, cu
);
11261 add_using_directive (using_directives (cu
->language
),
11265 imported_declaration
,
11268 &objfile
->objfile_obstack
);
11271 /* ICC<14 does not output the required DW_AT_declaration on incomplete
11272 types, but gives them a size of zero. Starting with version 14,
11273 ICC is compatible with GCC. */
11276 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
11278 if (!cu
->checked_producer
)
11279 check_producer (cu
);
11281 return cu
->producer_is_icc_lt_14
;
11284 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
11285 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
11286 this, it was first present in GCC release 4.3.0. */
11289 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
11291 if (!cu
->checked_producer
)
11292 check_producer (cu
);
11294 return cu
->producer_is_gcc_lt_4_3
;
11297 static file_and_directory
11298 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
11300 file_and_directory res
;
11302 /* Find the filename. Do not use dwarf2_name here, since the filename
11303 is not a source language identifier. */
11304 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
11305 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
11307 if (res
.comp_dir
== NULL
11308 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
11309 && IS_ABSOLUTE_PATH (res
.name
))
11311 res
.comp_dir_storage
= ldirname (res
.name
);
11312 if (!res
.comp_dir_storage
.empty ())
11313 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
11315 if (res
.comp_dir
!= NULL
)
11317 /* Irix 6.2 native cc prepends <machine>.: to the compilation
11318 directory, get rid of it. */
11319 const char *cp
= strchr (res
.comp_dir
, ':');
11321 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
11322 res
.comp_dir
= cp
+ 1;
11325 if (res
.name
== NULL
)
11326 res
.name
= "<unknown>";
11331 /* Handle DW_AT_stmt_list for a compilation unit.
11332 DIE is the DW_TAG_compile_unit die for CU.
11333 COMP_DIR is the compilation directory. LOWPC is passed to
11334 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
11337 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
11338 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
11340 struct dwarf2_per_objfile
*dwarf2_per_objfile
11341 = cu
->per_cu
->dwarf2_per_objfile
;
11342 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11343 struct attribute
*attr
;
11344 struct line_header line_header_local
;
11345 hashval_t line_header_local_hash
;
11347 int decode_mapping
;
11349 gdb_assert (! cu
->per_cu
->is_debug_types
);
11351 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11355 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11357 /* The line header hash table is only created if needed (it exists to
11358 prevent redundant reading of the line table for partial_units).
11359 If we're given a partial_unit, we'll need it. If we're given a
11360 compile_unit, then use the line header hash table if it's already
11361 created, but don't create one just yet. */
11363 if (dwarf2_per_objfile
->line_header_hash
== NULL
11364 && die
->tag
== DW_TAG_partial_unit
)
11366 dwarf2_per_objfile
->line_header_hash
11367 = htab_create_alloc_ex (127, line_header_hash_voidp
,
11368 line_header_eq_voidp
,
11369 free_line_header_voidp
,
11370 &objfile
->objfile_obstack
,
11371 hashtab_obstack_allocate
,
11372 dummy_obstack_deallocate
);
11375 line_header_local
.sect_off
= line_offset
;
11376 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
11377 line_header_local_hash
= line_header_hash (&line_header_local
);
11378 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
11380 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11381 &line_header_local
,
11382 line_header_local_hash
, NO_INSERT
);
11384 /* For DW_TAG_compile_unit we need info like symtab::linetable which
11385 is not present in *SLOT (since if there is something in *SLOT then
11386 it will be for a partial_unit). */
11387 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
11389 gdb_assert (*slot
!= NULL
);
11390 cu
->line_header
= (struct line_header
*) *slot
;
11395 /* dwarf_decode_line_header does not yet provide sufficient information.
11396 We always have to call also dwarf_decode_lines for it. */
11397 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
11401 cu
->line_header
= lh
.release ();
11402 cu
->line_header_die_owner
= die
;
11404 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
11408 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11409 &line_header_local
,
11410 line_header_local_hash
, INSERT
);
11411 gdb_assert (slot
!= NULL
);
11413 if (slot
!= NULL
&& *slot
== NULL
)
11415 /* This newly decoded line number information unit will be owned
11416 by line_header_hash hash table. */
11417 *slot
= cu
->line_header
;
11418 cu
->line_header_die_owner
= NULL
;
11422 /* We cannot free any current entry in (*slot) as that struct line_header
11423 may be already used by multiple CUs. Create only temporary decoded
11424 line_header for this CU - it may happen at most once for each line
11425 number information unit. And if we're not using line_header_hash
11426 then this is what we want as well. */
11427 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
11429 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
11430 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
11435 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
11438 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11440 struct dwarf2_per_objfile
*dwarf2_per_objfile
11441 = cu
->per_cu
->dwarf2_per_objfile
;
11442 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11443 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11444 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
11445 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
11446 struct attribute
*attr
;
11447 struct die_info
*child_die
;
11448 CORE_ADDR baseaddr
;
11450 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11452 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
11454 /* If we didn't find a lowpc, set it to highpc to avoid complaints
11455 from finish_block. */
11456 if (lowpc
== ((CORE_ADDR
) -1))
11458 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11460 file_and_directory fnd
= find_file_and_directory (die
, cu
);
11462 prepare_one_comp_unit (cu
, die
, cu
->language
);
11464 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
11465 standardised yet. As a workaround for the language detection we fall
11466 back to the DW_AT_producer string. */
11467 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
11468 cu
->language
= language_opencl
;
11470 /* Similar hack for Go. */
11471 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
11472 set_cu_language (DW_LANG_Go
, cu
);
11474 dwarf2_start_symtab (cu
, fnd
.name
, fnd
.comp_dir
, lowpc
);
11476 /* Decode line number information if present. We do this before
11477 processing child DIEs, so that the line header table is available
11478 for DW_AT_decl_file. */
11479 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
11481 /* Process all dies in compilation unit. */
11482 if (die
->child
!= NULL
)
11484 child_die
= die
->child
;
11485 while (child_die
&& child_die
->tag
)
11487 process_die (child_die
, cu
);
11488 child_die
= sibling_die (child_die
);
11492 /* Decode macro information, if present. Dwarf 2 macro information
11493 refers to information in the line number info statement program
11494 header, so we can only read it if we've read the header
11496 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11498 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11499 if (attr
&& cu
->line_header
)
11501 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11502 complaint (&symfile_complaints
,
11503 _("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11505 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
11509 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11510 if (attr
&& cu
->line_header
)
11512 unsigned int macro_offset
= DW_UNSND (attr
);
11514 dwarf_decode_macros (cu
, macro_offset
, 0);
11519 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
11520 Create the set of symtabs used by this TU, or if this TU is sharing
11521 symtabs with another TU and the symtabs have already been created
11522 then restore those symtabs in the line header.
11523 We don't need the pc/line-number mapping for type units. */
11526 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
11528 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
11529 struct type_unit_group
*tu_group
;
11531 struct attribute
*attr
;
11533 struct signatured_type
*sig_type
;
11535 gdb_assert (per_cu
->is_debug_types
);
11536 sig_type
= (struct signatured_type
*) per_cu
;
11538 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11540 /* If we're using .gdb_index (includes -readnow) then
11541 per_cu->type_unit_group may not have been set up yet. */
11542 if (sig_type
->type_unit_group
== NULL
)
11543 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
11544 tu_group
= sig_type
->type_unit_group
;
11546 /* If we've already processed this stmt_list there's no real need to
11547 do it again, we could fake it and just recreate the part we need
11548 (file name,index -> symtab mapping). If data shows this optimization
11549 is useful we can do it then. */
11550 first_time
= tu_group
->compunit_symtab
== NULL
;
11552 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11557 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11558 lh
= dwarf_decode_line_header (line_offset
, cu
);
11563 dwarf2_start_symtab (cu
, "", NULL
, 0);
11566 gdb_assert (tu_group
->symtabs
== NULL
);
11567 restart_symtab (tu_group
->compunit_symtab
, "", 0);
11572 cu
->line_header
= lh
.release ();
11573 cu
->line_header_die_owner
= die
;
11577 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
11579 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11580 still initializing it, and our caller (a few levels up)
11581 process_full_type_unit still needs to know if this is the first
11584 tu_group
->num_symtabs
= cu
->line_header
->file_names
.size ();
11585 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
11586 cu
->line_header
->file_names
.size ());
11588 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
11590 file_entry
&fe
= cu
->line_header
->file_names
[i
];
11592 dwarf2_start_subfile (fe
.name
, fe
.include_dir (cu
->line_header
));
11594 if (current_subfile
->symtab
== NULL
)
11596 /* NOTE: start_subfile will recognize when it's been
11597 passed a file it has already seen. So we can't
11598 assume there's a simple mapping from
11599 cu->line_header->file_names to subfiles, plus
11600 cu->line_header->file_names may contain dups. */
11601 current_subfile
->symtab
11602 = allocate_symtab (cust
, current_subfile
->name
);
11605 fe
.symtab
= current_subfile
->symtab
;
11606 tu_group
->symtabs
[i
] = fe
.symtab
;
11611 restart_symtab (tu_group
->compunit_symtab
, "", 0);
11613 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
11615 file_entry
&fe
= cu
->line_header
->file_names
[i
];
11617 fe
.symtab
= tu_group
->symtabs
[i
];
11621 /* The main symtab is allocated last. Type units don't have DW_AT_name
11622 so they don't have a "real" (so to speak) symtab anyway.
11623 There is later code that will assign the main symtab to all symbols
11624 that don't have one. We need to handle the case of a symbol with a
11625 missing symtab (DW_AT_decl_file) anyway. */
11628 /* Process DW_TAG_type_unit.
11629 For TUs we want to skip the first top level sibling if it's not the
11630 actual type being defined by this TU. In this case the first top
11631 level sibling is there to provide context only. */
11634 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11636 struct die_info
*child_die
;
11638 prepare_one_comp_unit (cu
, die
, language_minimal
);
11640 /* Initialize (or reinitialize) the machinery for building symtabs.
11641 We do this before processing child DIEs, so that the line header table
11642 is available for DW_AT_decl_file. */
11643 setup_type_unit_groups (die
, cu
);
11645 if (die
->child
!= NULL
)
11647 child_die
= die
->child
;
11648 while (child_die
&& child_die
->tag
)
11650 process_die (child_die
, cu
);
11651 child_die
= sibling_die (child_die
);
11658 http://gcc.gnu.org/wiki/DebugFission
11659 http://gcc.gnu.org/wiki/DebugFissionDWP
11661 To simplify handling of both DWO files ("object" files with the DWARF info)
11662 and DWP files (a file with the DWOs packaged up into one file), we treat
11663 DWP files as having a collection of virtual DWO files. */
11666 hash_dwo_file (const void *item
)
11668 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11671 hash
= htab_hash_string (dwo_file
->dwo_name
);
11672 if (dwo_file
->comp_dir
!= NULL
)
11673 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11678 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11680 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11681 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11683 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11685 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11686 return lhs
->comp_dir
== rhs
->comp_dir
;
11687 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11690 /* Allocate a hash table for DWO files. */
11693 allocate_dwo_file_hash_table (struct objfile
*objfile
)
11695 return htab_create_alloc_ex (41,
11699 &objfile
->objfile_obstack
,
11700 hashtab_obstack_allocate
,
11701 dummy_obstack_deallocate
);
11704 /* Lookup DWO file DWO_NAME. */
11707 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11708 const char *dwo_name
,
11709 const char *comp_dir
)
11711 struct dwo_file find_entry
;
11714 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11715 dwarf2_per_objfile
->dwo_files
11716 = allocate_dwo_file_hash_table (dwarf2_per_objfile
->objfile
);
11718 memset (&find_entry
, 0, sizeof (find_entry
));
11719 find_entry
.dwo_name
= dwo_name
;
11720 find_entry
.comp_dir
= comp_dir
;
11721 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
11727 hash_dwo_unit (const void *item
)
11729 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11731 /* This drops the top 32 bits of the id, but is ok for a hash. */
11732 return dwo_unit
->signature
;
11736 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11738 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11739 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11741 /* The signature is assumed to be unique within the DWO file.
11742 So while object file CU dwo_id's always have the value zero,
11743 that's OK, assuming each object file DWO file has only one CU,
11744 and that's the rule for now. */
11745 return lhs
->signature
== rhs
->signature
;
11748 /* Allocate a hash table for DWO CUs,TUs.
11749 There is one of these tables for each of CUs,TUs for each DWO file. */
11752 allocate_dwo_unit_table (struct objfile
*objfile
)
11754 /* Start out with a pretty small number.
11755 Generally DWO files contain only one CU and maybe some TUs. */
11756 return htab_create_alloc_ex (3,
11760 &objfile
->objfile_obstack
,
11761 hashtab_obstack_allocate
,
11762 dummy_obstack_deallocate
);
11765 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
11767 struct create_dwo_cu_data
11769 struct dwo_file
*dwo_file
;
11770 struct dwo_unit dwo_unit
;
11773 /* die_reader_func for create_dwo_cu. */
11776 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11777 const gdb_byte
*info_ptr
,
11778 struct die_info
*comp_unit_die
,
11782 struct dwarf2_cu
*cu
= reader
->cu
;
11783 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11784 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11785 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
11786 struct dwo_file
*dwo_file
= data
->dwo_file
;
11787 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
11788 struct attribute
*attr
;
11790 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
11793 complaint (&symfile_complaints
,
11794 _("Dwarf Error: debug entry at offset %s is missing"
11795 " its dwo_id [in module %s]"),
11796 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11800 dwo_unit
->dwo_file
= dwo_file
;
11801 dwo_unit
->signature
= DW_UNSND (attr
);
11802 dwo_unit
->section
= section
;
11803 dwo_unit
->sect_off
= sect_off
;
11804 dwo_unit
->length
= cu
->per_cu
->length
;
11806 if (dwarf_read_debug
)
11807 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11808 sect_offset_str (sect_off
),
11809 hex_string (dwo_unit
->signature
));
11812 /* Create the dwo_units for the CUs in a DWO_FILE.
11813 Note: This function processes DWO files only, not DWP files. */
11816 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11817 struct dwo_file
&dwo_file
, dwarf2_section_info
§ion
,
11820 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11821 const gdb_byte
*info_ptr
, *end_ptr
;
11823 dwarf2_read_section (objfile
, §ion
);
11824 info_ptr
= section
.buffer
;
11826 if (info_ptr
== NULL
)
11829 if (dwarf_read_debug
)
11831 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11832 get_section_name (§ion
),
11833 get_section_file_name (§ion
));
11836 end_ptr
= info_ptr
+ section
.size
;
11837 while (info_ptr
< end_ptr
)
11839 struct dwarf2_per_cu_data per_cu
;
11840 struct create_dwo_cu_data create_dwo_cu_data
;
11841 struct dwo_unit
*dwo_unit
;
11843 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11845 memset (&create_dwo_cu_data
.dwo_unit
, 0,
11846 sizeof (create_dwo_cu_data
.dwo_unit
));
11847 memset (&per_cu
, 0, sizeof (per_cu
));
11848 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11849 per_cu
.is_debug_types
= 0;
11850 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11851 per_cu
.section
= §ion
;
11852 create_dwo_cu_data
.dwo_file
= &dwo_file
;
11854 init_cutu_and_read_dies_no_follow (
11855 &per_cu
, &dwo_file
, create_dwo_cu_reader
, &create_dwo_cu_data
);
11856 info_ptr
+= per_cu
.length
;
11858 // If the unit could not be parsed, skip it.
11859 if (create_dwo_cu_data
.dwo_unit
.dwo_file
== NULL
)
11862 if (cus_htab
== NULL
)
11863 cus_htab
= allocate_dwo_unit_table (objfile
);
11865 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11866 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
11867 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
11868 gdb_assert (slot
!= NULL
);
11871 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11872 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11874 complaint (&symfile_complaints
,
11875 _("debug cu entry at offset %s is duplicate to"
11876 " the entry at offset %s, signature %s"),
11877 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11878 hex_string (dwo_unit
->signature
));
11880 *slot
= (void *)dwo_unit
;
11884 /* DWP file .debug_{cu,tu}_index section format:
11885 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11889 Both index sections have the same format, and serve to map a 64-bit
11890 signature to a set of section numbers. Each section begins with a header,
11891 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11892 indexes, and a pool of 32-bit section numbers. The index sections will be
11893 aligned at 8-byte boundaries in the file.
11895 The index section header consists of:
11897 V, 32 bit version number
11899 N, 32 bit number of compilation units or type units in the index
11900 M, 32 bit number of slots in the hash table
11902 Numbers are recorded using the byte order of the application binary.
11904 The hash table begins at offset 16 in the section, and consists of an array
11905 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11906 order of the application binary). Unused slots in the hash table are 0.
11907 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11909 The parallel table begins immediately after the hash table
11910 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11911 array of 32-bit indexes (using the byte order of the application binary),
11912 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11913 table contains a 32-bit index into the pool of section numbers. For unused
11914 hash table slots, the corresponding entry in the parallel table will be 0.
11916 The pool of section numbers begins immediately following the hash table
11917 (at offset 16 + 12 * M from the beginning of the section). The pool of
11918 section numbers consists of an array of 32-bit words (using the byte order
11919 of the application binary). Each item in the array is indexed starting
11920 from 0. The hash table entry provides the index of the first section
11921 number in the set. Additional section numbers in the set follow, and the
11922 set is terminated by a 0 entry (section number 0 is not used in ELF).
11924 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11925 section must be the first entry in the set, and the .debug_abbrev.dwo must
11926 be the second entry. Other members of the set may follow in any order.
11932 DWP Version 2 combines all the .debug_info, etc. sections into one,
11933 and the entries in the index tables are now offsets into these sections.
11934 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11937 Index Section Contents:
11939 Hash Table of Signatures dwp_hash_table.hash_table
11940 Parallel Table of Indices dwp_hash_table.unit_table
11941 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
11942 Table of Section Sizes dwp_hash_table.v2.sizes
11944 The index section header consists of:
11946 V, 32 bit version number
11947 L, 32 bit number of columns in the table of section offsets
11948 N, 32 bit number of compilation units or type units in the index
11949 M, 32 bit number of slots in the hash table
11951 Numbers are recorded using the byte order of the application binary.
11953 The hash table has the same format as version 1.
11954 The parallel table of indices has the same format as version 1,
11955 except that the entries are origin-1 indices into the table of sections
11956 offsets and the table of section sizes.
11958 The table of offsets begins immediately following the parallel table
11959 (at offset 16 + 12 * M from the beginning of the section). The table is
11960 a two-dimensional array of 32-bit words (using the byte order of the
11961 application binary), with L columns and N+1 rows, in row-major order.
11962 Each row in the array is indexed starting from 0. The first row provides
11963 a key to the remaining rows: each column in this row provides an identifier
11964 for a debug section, and the offsets in the same column of subsequent rows
11965 refer to that section. The section identifiers are:
11967 DW_SECT_INFO 1 .debug_info.dwo
11968 DW_SECT_TYPES 2 .debug_types.dwo
11969 DW_SECT_ABBREV 3 .debug_abbrev.dwo
11970 DW_SECT_LINE 4 .debug_line.dwo
11971 DW_SECT_LOC 5 .debug_loc.dwo
11972 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
11973 DW_SECT_MACINFO 7 .debug_macinfo.dwo
11974 DW_SECT_MACRO 8 .debug_macro.dwo
11976 The offsets provided by the CU and TU index sections are the base offsets
11977 for the contributions made by each CU or TU to the corresponding section
11978 in the package file. Each CU and TU header contains an abbrev_offset
11979 field, used to find the abbreviations table for that CU or TU within the
11980 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
11981 be interpreted as relative to the base offset given in the index section.
11982 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
11983 should be interpreted as relative to the base offset for .debug_line.dwo,
11984 and offsets into other debug sections obtained from DWARF attributes should
11985 also be interpreted as relative to the corresponding base offset.
11987 The table of sizes begins immediately following the table of offsets.
11988 Like the table of offsets, it is a two-dimensional array of 32-bit words,
11989 with L columns and N rows, in row-major order. Each row in the array is
11990 indexed starting from 1 (row 0 is shared by the two tables).
11994 Hash table lookup is handled the same in version 1 and 2:
11996 We assume that N and M will not exceed 2^32 - 1.
11997 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
11999 Given a 64-bit compilation unit signature or a type signature S, an entry
12000 in the hash table is located as follows:
12002 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
12003 the low-order k bits all set to 1.
12005 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
12007 3) If the hash table entry at index H matches the signature, use that
12008 entry. If the hash table entry at index H is unused (all zeroes),
12009 terminate the search: the signature is not present in the table.
12011 4) Let H = (H + H') modulo M. Repeat at Step 3.
12013 Because M > N and H' and M are relatively prime, the search is guaranteed
12014 to stop at an unused slot or find the match. */
12016 /* Create a hash table to map DWO IDs to their CU/TU entry in
12017 .debug_{info,types}.dwo in DWP_FILE.
12018 Returns NULL if there isn't one.
12019 Note: This function processes DWP files only, not DWO files. */
12021 static struct dwp_hash_table
*
12022 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12023 struct dwp_file
*dwp_file
, int is_debug_types
)
12025 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12026 bfd
*dbfd
= dwp_file
->dbfd
;
12027 const gdb_byte
*index_ptr
, *index_end
;
12028 struct dwarf2_section_info
*index
;
12029 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
12030 struct dwp_hash_table
*htab
;
12032 if (is_debug_types
)
12033 index
= &dwp_file
->sections
.tu_index
;
12035 index
= &dwp_file
->sections
.cu_index
;
12037 if (dwarf2_section_empty_p (index
))
12039 dwarf2_read_section (objfile
, index
);
12041 index_ptr
= index
->buffer
;
12042 index_end
= index_ptr
+ index
->size
;
12044 version
= read_4_bytes (dbfd
, index_ptr
);
12047 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
12051 nr_units
= read_4_bytes (dbfd
, index_ptr
);
12053 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
12056 if (version
!= 1 && version
!= 2)
12058 error (_("Dwarf Error: unsupported DWP file version (%s)"
12059 " [in module %s]"),
12060 pulongest (version
), dwp_file
->name
);
12062 if (nr_slots
!= (nr_slots
& -nr_slots
))
12064 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
12065 " is not power of 2 [in module %s]"),
12066 pulongest (nr_slots
), dwp_file
->name
);
12069 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
12070 htab
->version
= version
;
12071 htab
->nr_columns
= nr_columns
;
12072 htab
->nr_units
= nr_units
;
12073 htab
->nr_slots
= nr_slots
;
12074 htab
->hash_table
= index_ptr
;
12075 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
12077 /* Exit early if the table is empty. */
12078 if (nr_slots
== 0 || nr_units
== 0
12079 || (version
== 2 && nr_columns
== 0))
12081 /* All must be zero. */
12082 if (nr_slots
!= 0 || nr_units
!= 0
12083 || (version
== 2 && nr_columns
!= 0))
12085 complaint (&symfile_complaints
,
12086 _("Empty DWP but nr_slots,nr_units,nr_columns not"
12087 " all zero [in modules %s]"),
12095 htab
->section_pool
.v1
.indices
=
12096 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12097 /* It's harder to decide whether the section is too small in v1.
12098 V1 is deprecated anyway so we punt. */
12102 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12103 int *ids
= htab
->section_pool
.v2
.section_ids
;
12104 /* Reverse map for error checking. */
12105 int ids_seen
[DW_SECT_MAX
+ 1];
12108 if (nr_columns
< 2)
12110 error (_("Dwarf Error: bad DWP hash table, too few columns"
12111 " in section table [in module %s]"),
12114 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
12116 error (_("Dwarf Error: bad DWP hash table, too many columns"
12117 " in section table [in module %s]"),
12120 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
12121 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
12122 for (i
= 0; i
< nr_columns
; ++i
)
12124 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
12126 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
12128 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
12129 " in section table [in module %s]"),
12130 id
, dwp_file
->name
);
12132 if (ids_seen
[id
] != -1)
12134 error (_("Dwarf Error: bad DWP hash table, duplicate section"
12135 " id %d in section table [in module %s]"),
12136 id
, dwp_file
->name
);
12141 /* Must have exactly one info or types section. */
12142 if (((ids_seen
[DW_SECT_INFO
] != -1)
12143 + (ids_seen
[DW_SECT_TYPES
] != -1))
12146 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
12147 " DWO info/types section [in module %s]"),
12150 /* Must have an abbrev section. */
12151 if (ids_seen
[DW_SECT_ABBREV
] == -1)
12153 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
12154 " section [in module %s]"),
12157 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
12158 htab
->section_pool
.v2
.sizes
=
12159 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
12160 * nr_units
* nr_columns
);
12161 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
12162 * nr_units
* nr_columns
))
12165 error (_("Dwarf Error: DWP index section is corrupt (too small)"
12166 " [in module %s]"),
12174 /* Update SECTIONS with the data from SECTP.
12176 This function is like the other "locate" section routines that are
12177 passed to bfd_map_over_sections, but in this context the sections to
12178 read comes from the DWP V1 hash table, not the full ELF section table.
12180 The result is non-zero for success, or zero if an error was found. */
12183 locate_v1_virtual_dwo_sections (asection
*sectp
,
12184 struct virtual_v1_dwo_sections
*sections
)
12186 const struct dwop_section_names
*names
= &dwop_section_names
;
12188 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12190 /* There can be only one. */
12191 if (sections
->abbrev
.s
.section
!= NULL
)
12193 sections
->abbrev
.s
.section
= sectp
;
12194 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12196 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
12197 || section_is_p (sectp
->name
, &names
->types_dwo
))
12199 /* There can be only one. */
12200 if (sections
->info_or_types
.s
.section
!= NULL
)
12202 sections
->info_or_types
.s
.section
= sectp
;
12203 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
12205 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12207 /* There can be only one. */
12208 if (sections
->line
.s
.section
!= NULL
)
12210 sections
->line
.s
.section
= sectp
;
12211 sections
->line
.size
= bfd_get_section_size (sectp
);
12213 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12215 /* There can be only one. */
12216 if (sections
->loc
.s
.section
!= NULL
)
12218 sections
->loc
.s
.section
= sectp
;
12219 sections
->loc
.size
= bfd_get_section_size (sectp
);
12221 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12223 /* There can be only one. */
12224 if (sections
->macinfo
.s
.section
!= NULL
)
12226 sections
->macinfo
.s
.section
= sectp
;
12227 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12229 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12231 /* There can be only one. */
12232 if (sections
->macro
.s
.section
!= NULL
)
12234 sections
->macro
.s
.section
= sectp
;
12235 sections
->macro
.size
= bfd_get_section_size (sectp
);
12237 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12239 /* There can be only one. */
12240 if (sections
->str_offsets
.s
.section
!= NULL
)
12242 sections
->str_offsets
.s
.section
= sectp
;
12243 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12247 /* No other kind of section is valid. */
12254 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12255 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12256 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12257 This is for DWP version 1 files. */
12259 static struct dwo_unit
*
12260 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12261 struct dwp_file
*dwp_file
,
12262 uint32_t unit_index
,
12263 const char *comp_dir
,
12264 ULONGEST signature
, int is_debug_types
)
12266 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12267 const struct dwp_hash_table
*dwp_htab
=
12268 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12269 bfd
*dbfd
= dwp_file
->dbfd
;
12270 const char *kind
= is_debug_types
? "TU" : "CU";
12271 struct dwo_file
*dwo_file
;
12272 struct dwo_unit
*dwo_unit
;
12273 struct virtual_v1_dwo_sections sections
;
12274 void **dwo_file_slot
;
12277 gdb_assert (dwp_file
->version
== 1);
12279 if (dwarf_read_debug
)
12281 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
12283 pulongest (unit_index
), hex_string (signature
),
12287 /* Fetch the sections of this DWO unit.
12288 Put a limit on the number of sections we look for so that bad data
12289 doesn't cause us to loop forever. */
12291 #define MAX_NR_V1_DWO_SECTIONS \
12292 (1 /* .debug_info or .debug_types */ \
12293 + 1 /* .debug_abbrev */ \
12294 + 1 /* .debug_line */ \
12295 + 1 /* .debug_loc */ \
12296 + 1 /* .debug_str_offsets */ \
12297 + 1 /* .debug_macro or .debug_macinfo */ \
12298 + 1 /* trailing zero */)
12300 memset (§ions
, 0, sizeof (sections
));
12302 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
12305 uint32_t section_nr
=
12306 read_4_bytes (dbfd
,
12307 dwp_htab
->section_pool
.v1
.indices
12308 + (unit_index
+ i
) * sizeof (uint32_t));
12310 if (section_nr
== 0)
12312 if (section_nr
>= dwp_file
->num_sections
)
12314 error (_("Dwarf Error: bad DWP hash table, section number too large"
12315 " [in module %s]"),
12319 sectp
= dwp_file
->elf_sections
[section_nr
];
12320 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
12322 error (_("Dwarf Error: bad DWP hash table, invalid section found"
12323 " [in module %s]"),
12329 || dwarf2_section_empty_p (§ions
.info_or_types
)
12330 || dwarf2_section_empty_p (§ions
.abbrev
))
12332 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
12333 " [in module %s]"),
12336 if (i
== MAX_NR_V1_DWO_SECTIONS
)
12338 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
12339 " [in module %s]"),
12343 /* It's easier for the rest of the code if we fake a struct dwo_file and
12344 have dwo_unit "live" in that. At least for now.
12346 The DWP file can be made up of a random collection of CUs and TUs.
12347 However, for each CU + set of TUs that came from the same original DWO
12348 file, we can combine them back into a virtual DWO file to save space
12349 (fewer struct dwo_file objects to allocate). Remember that for really
12350 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12352 std::string virtual_dwo_name
=
12353 string_printf ("virtual-dwo/%d-%d-%d-%d",
12354 get_section_id (§ions
.abbrev
),
12355 get_section_id (§ions
.line
),
12356 get_section_id (§ions
.loc
),
12357 get_section_id (§ions
.str_offsets
));
12358 /* Can we use an existing virtual DWO file? */
12359 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12360 virtual_dwo_name
.c_str (),
12362 /* Create one if necessary. */
12363 if (*dwo_file_slot
== NULL
)
12365 if (dwarf_read_debug
)
12367 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12368 virtual_dwo_name
.c_str ());
12370 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12372 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12373 virtual_dwo_name
.c_str (),
12374 virtual_dwo_name
.size ());
12375 dwo_file
->comp_dir
= comp_dir
;
12376 dwo_file
->sections
.abbrev
= sections
.abbrev
;
12377 dwo_file
->sections
.line
= sections
.line
;
12378 dwo_file
->sections
.loc
= sections
.loc
;
12379 dwo_file
->sections
.macinfo
= sections
.macinfo
;
12380 dwo_file
->sections
.macro
= sections
.macro
;
12381 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
12382 /* The "str" section is global to the entire DWP file. */
12383 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12384 /* The info or types section is assigned below to dwo_unit,
12385 there's no need to record it in dwo_file.
12386 Also, we can't simply record type sections in dwo_file because
12387 we record a pointer into the vector in dwo_unit. As we collect more
12388 types we'll grow the vector and eventually have to reallocate space
12389 for it, invalidating all copies of pointers into the previous
12391 *dwo_file_slot
= dwo_file
;
12395 if (dwarf_read_debug
)
12397 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12398 virtual_dwo_name
.c_str ());
12400 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12403 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12404 dwo_unit
->dwo_file
= dwo_file
;
12405 dwo_unit
->signature
= signature
;
12406 dwo_unit
->section
=
12407 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12408 *dwo_unit
->section
= sections
.info_or_types
;
12409 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12414 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
12415 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
12416 piece within that section used by a TU/CU, return a virtual section
12417 of just that piece. */
12419 static struct dwarf2_section_info
12420 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12421 struct dwarf2_section_info
*section
,
12422 bfd_size_type offset
, bfd_size_type size
)
12424 struct dwarf2_section_info result
;
12427 gdb_assert (section
!= NULL
);
12428 gdb_assert (!section
->is_virtual
);
12430 memset (&result
, 0, sizeof (result
));
12431 result
.s
.containing_section
= section
;
12432 result
.is_virtual
= 1;
12437 sectp
= get_section_bfd_section (section
);
12439 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
12440 bounds of the real section. This is a pretty-rare event, so just
12441 flag an error (easier) instead of a warning and trying to cope. */
12443 || offset
+ size
> bfd_get_section_size (sectp
))
12445 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
12446 " in section %s [in module %s]"),
12447 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
12448 objfile_name (dwarf2_per_objfile
->objfile
));
12451 result
.virtual_offset
= offset
;
12452 result
.size
= size
;
12456 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12457 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12458 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12459 This is for DWP version 2 files. */
12461 static struct dwo_unit
*
12462 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12463 struct dwp_file
*dwp_file
,
12464 uint32_t unit_index
,
12465 const char *comp_dir
,
12466 ULONGEST signature
, int is_debug_types
)
12468 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12469 const struct dwp_hash_table
*dwp_htab
=
12470 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12471 bfd
*dbfd
= dwp_file
->dbfd
;
12472 const char *kind
= is_debug_types
? "TU" : "CU";
12473 struct dwo_file
*dwo_file
;
12474 struct dwo_unit
*dwo_unit
;
12475 struct virtual_v2_dwo_sections sections
;
12476 void **dwo_file_slot
;
12479 gdb_assert (dwp_file
->version
== 2);
12481 if (dwarf_read_debug
)
12483 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
12485 pulongest (unit_index
), hex_string (signature
),
12489 /* Fetch the section offsets of this DWO unit. */
12491 memset (§ions
, 0, sizeof (sections
));
12493 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12495 uint32_t offset
= read_4_bytes (dbfd
,
12496 dwp_htab
->section_pool
.v2
.offsets
12497 + (((unit_index
- 1) * dwp_htab
->nr_columns
12499 * sizeof (uint32_t)));
12500 uint32_t size
= read_4_bytes (dbfd
,
12501 dwp_htab
->section_pool
.v2
.sizes
12502 + (((unit_index
- 1) * dwp_htab
->nr_columns
12504 * sizeof (uint32_t)));
12506 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12509 case DW_SECT_TYPES
:
12510 sections
.info_or_types_offset
= offset
;
12511 sections
.info_or_types_size
= size
;
12513 case DW_SECT_ABBREV
:
12514 sections
.abbrev_offset
= offset
;
12515 sections
.abbrev_size
= size
;
12518 sections
.line_offset
= offset
;
12519 sections
.line_size
= size
;
12522 sections
.loc_offset
= offset
;
12523 sections
.loc_size
= size
;
12525 case DW_SECT_STR_OFFSETS
:
12526 sections
.str_offsets_offset
= offset
;
12527 sections
.str_offsets_size
= size
;
12529 case DW_SECT_MACINFO
:
12530 sections
.macinfo_offset
= offset
;
12531 sections
.macinfo_size
= size
;
12533 case DW_SECT_MACRO
:
12534 sections
.macro_offset
= offset
;
12535 sections
.macro_size
= size
;
12540 /* It's easier for the rest of the code if we fake a struct dwo_file and
12541 have dwo_unit "live" in that. At least for now.
12543 The DWP file can be made up of a random collection of CUs and TUs.
12544 However, for each CU + set of TUs that came from the same original DWO
12545 file, we can combine them back into a virtual DWO file to save space
12546 (fewer struct dwo_file objects to allocate). Remember that for really
12547 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12549 std::string virtual_dwo_name
=
12550 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12551 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12552 (long) (sections
.line_size
? sections
.line_offset
: 0),
12553 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12554 (long) (sections
.str_offsets_size
12555 ? sections
.str_offsets_offset
: 0));
12556 /* Can we use an existing virtual DWO file? */
12557 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12558 virtual_dwo_name
.c_str (),
12560 /* Create one if necessary. */
12561 if (*dwo_file_slot
== NULL
)
12563 if (dwarf_read_debug
)
12565 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12566 virtual_dwo_name
.c_str ());
12568 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12570 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12571 virtual_dwo_name
.c_str (),
12572 virtual_dwo_name
.size ());
12573 dwo_file
->comp_dir
= comp_dir
;
12574 dwo_file
->sections
.abbrev
=
12575 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
12576 sections
.abbrev_offset
, sections
.abbrev_size
);
12577 dwo_file
->sections
.line
=
12578 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
12579 sections
.line_offset
, sections
.line_size
);
12580 dwo_file
->sections
.loc
=
12581 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12582 sections
.loc_offset
, sections
.loc_size
);
12583 dwo_file
->sections
.macinfo
=
12584 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12585 sections
.macinfo_offset
, sections
.macinfo_size
);
12586 dwo_file
->sections
.macro
=
12587 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12588 sections
.macro_offset
, sections
.macro_size
);
12589 dwo_file
->sections
.str_offsets
=
12590 create_dwp_v2_section (dwarf2_per_objfile
,
12591 &dwp_file
->sections
.str_offsets
,
12592 sections
.str_offsets_offset
,
12593 sections
.str_offsets_size
);
12594 /* The "str" section is global to the entire DWP file. */
12595 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12596 /* The info or types section is assigned below to dwo_unit,
12597 there's no need to record it in dwo_file.
12598 Also, we can't simply record type sections in dwo_file because
12599 we record a pointer into the vector in dwo_unit. As we collect more
12600 types we'll grow the vector and eventually have to reallocate space
12601 for it, invalidating all copies of pointers into the previous
12603 *dwo_file_slot
= dwo_file
;
12607 if (dwarf_read_debug
)
12609 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12610 virtual_dwo_name
.c_str ());
12612 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12615 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12616 dwo_unit
->dwo_file
= dwo_file
;
12617 dwo_unit
->signature
= signature
;
12618 dwo_unit
->section
=
12619 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12620 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12622 ? &dwp_file
->sections
.types
12623 : &dwp_file
->sections
.info
,
12624 sections
.info_or_types_offset
,
12625 sections
.info_or_types_size
);
12626 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12631 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12632 Returns NULL if the signature isn't found. */
12634 static struct dwo_unit
*
12635 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12636 struct dwp_file
*dwp_file
, const char *comp_dir
,
12637 ULONGEST signature
, int is_debug_types
)
12639 const struct dwp_hash_table
*dwp_htab
=
12640 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12641 bfd
*dbfd
= dwp_file
->dbfd
;
12642 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12643 uint32_t hash
= signature
& mask
;
12644 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12647 struct dwo_unit find_dwo_cu
;
12649 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12650 find_dwo_cu
.signature
= signature
;
12651 slot
= htab_find_slot (is_debug_types
12652 ? dwp_file
->loaded_tus
12653 : dwp_file
->loaded_cus
,
12654 &find_dwo_cu
, INSERT
);
12657 return (struct dwo_unit
*) *slot
;
12659 /* Use a for loop so that we don't loop forever on bad debug info. */
12660 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12662 ULONGEST signature_in_table
;
12664 signature_in_table
=
12665 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12666 if (signature_in_table
== signature
)
12668 uint32_t unit_index
=
12669 read_4_bytes (dbfd
,
12670 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12672 if (dwp_file
->version
== 1)
12674 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12675 dwp_file
, unit_index
,
12676 comp_dir
, signature
,
12681 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12682 dwp_file
, unit_index
,
12683 comp_dir
, signature
,
12686 return (struct dwo_unit
*) *slot
;
12688 if (signature_in_table
== 0)
12690 hash
= (hash
+ hash2
) & mask
;
12693 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12694 " [in module %s]"),
12698 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12699 Open the file specified by FILE_NAME and hand it off to BFD for
12700 preliminary analysis. Return a newly initialized bfd *, which
12701 includes a canonicalized copy of FILE_NAME.
12702 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12703 SEARCH_CWD is true if the current directory is to be searched.
12704 It will be searched before debug-file-directory.
12705 If successful, the file is added to the bfd include table of the
12706 objfile's bfd (see gdb_bfd_record_inclusion).
12707 If unable to find/open the file, return NULL.
12708 NOTE: This function is derived from symfile_bfd_open. */
12710 static gdb_bfd_ref_ptr
12711 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12712 const char *file_name
, int is_dwp
, int search_cwd
)
12715 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12716 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12717 to debug_file_directory. */
12718 const char *search_path
;
12719 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12721 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12724 if (*debug_file_directory
!= '\0')
12726 search_path_holder
.reset (concat (".", dirname_separator_string
,
12727 debug_file_directory
,
12729 search_path
= search_path_holder
.get ();
12735 search_path
= debug_file_directory
;
12737 openp_flags flags
= OPF_RETURN_REALPATH
;
12739 flags
|= OPF_SEARCH_IN_PATH
;
12741 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12742 desc
= openp (search_path
, flags
, file_name
,
12743 O_RDONLY
| O_BINARY
, &absolute_name
);
12747 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12749 if (sym_bfd
== NULL
)
12751 bfd_set_cacheable (sym_bfd
.get (), 1);
12753 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12756 /* Success. Record the bfd as having been included by the objfile's bfd.
12757 This is important because things like demangled_names_hash lives in the
12758 objfile's per_bfd space and may have references to things like symbol
12759 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12760 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12765 /* Try to open DWO file FILE_NAME.
12766 COMP_DIR is the DW_AT_comp_dir attribute.
12767 The result is the bfd handle of the file.
12768 If there is a problem finding or opening the file, return NULL.
12769 Upon success, the canonicalized path of the file is stored in the bfd,
12770 same as symfile_bfd_open. */
12772 static gdb_bfd_ref_ptr
12773 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12774 const char *file_name
, const char *comp_dir
)
12776 if (IS_ABSOLUTE_PATH (file_name
))
12777 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12778 0 /*is_dwp*/, 0 /*search_cwd*/);
12780 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12782 if (comp_dir
!= NULL
)
12784 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
12785 file_name
, (char *) NULL
);
12787 /* NOTE: If comp_dir is a relative path, this will also try the
12788 search path, which seems useful. */
12789 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12792 1 /*search_cwd*/));
12793 xfree (path_to_try
);
12798 /* That didn't work, try debug-file-directory, which, despite its name,
12799 is a list of paths. */
12801 if (*debug_file_directory
== '\0')
12804 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12805 0 /*is_dwp*/, 1 /*search_cwd*/);
12808 /* This function is mapped across the sections and remembers the offset and
12809 size of each of the DWO debugging sections we are interested in. */
12812 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12814 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12815 const struct dwop_section_names
*names
= &dwop_section_names
;
12817 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12819 dwo_sections
->abbrev
.s
.section
= sectp
;
12820 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12822 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12824 dwo_sections
->info
.s
.section
= sectp
;
12825 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
12827 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12829 dwo_sections
->line
.s
.section
= sectp
;
12830 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
12832 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12834 dwo_sections
->loc
.s
.section
= sectp
;
12835 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
12837 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12839 dwo_sections
->macinfo
.s
.section
= sectp
;
12840 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12842 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12844 dwo_sections
->macro
.s
.section
= sectp
;
12845 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
12847 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12849 dwo_sections
->str
.s
.section
= sectp
;
12850 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
12852 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12854 dwo_sections
->str_offsets
.s
.section
= sectp
;
12855 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12857 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12859 struct dwarf2_section_info type_section
;
12861 memset (&type_section
, 0, sizeof (type_section
));
12862 type_section
.s
.section
= sectp
;
12863 type_section
.size
= bfd_get_section_size (sectp
);
12864 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
12869 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12870 by PER_CU. This is for the non-DWP case.
12871 The result is NULL if DWO_NAME can't be found. */
12873 static struct dwo_file
*
12874 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12875 const char *dwo_name
, const char *comp_dir
)
12877 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12878 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12880 gdb_bfd_ref_ptr
dbfd (open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
));
12883 if (dwarf_read_debug
)
12884 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12888 /* We use a unique pointer here, despite the obstack allocation,
12889 because a dwo_file needs some cleanup if it is abandoned. */
12890 dwo_file_up
dwo_file (OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
12892 dwo_file
->dwo_name
= dwo_name
;
12893 dwo_file
->comp_dir
= comp_dir
;
12894 dwo_file
->dbfd
= dbfd
.release ();
12896 bfd_map_over_sections (dwo_file
->dbfd
, dwarf2_locate_dwo_sections
,
12897 &dwo_file
->sections
);
12899 create_cus_hash_table (dwarf2_per_objfile
, *dwo_file
, dwo_file
->sections
.info
,
12902 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
12903 dwo_file
->sections
.types
, dwo_file
->tus
);
12905 if (dwarf_read_debug
)
12906 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
12908 return dwo_file
.release ();
12911 /* This function is mapped across the sections and remembers the offset and
12912 size of each of the DWP debugging sections common to version 1 and 2 that
12913 we are interested in. */
12916 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12917 void *dwp_file_ptr
)
12919 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12920 const struct dwop_section_names
*names
= &dwop_section_names
;
12921 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12923 /* Record the ELF section number for later lookup: this is what the
12924 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12925 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12926 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12928 /* Look for specific sections that we need. */
12929 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12931 dwp_file
->sections
.str
.s
.section
= sectp
;
12932 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
12934 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12936 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12937 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
12939 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12941 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12942 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
12946 /* This function is mapped across the sections and remembers the offset and
12947 size of each of the DWP version 2 debugging sections that we are interested
12948 in. This is split into a separate function because we don't know if we
12949 have version 1 or 2 until we parse the cu_index/tu_index sections. */
12952 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12954 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12955 const struct dwop_section_names
*names
= &dwop_section_names
;
12956 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12958 /* Record the ELF section number for later lookup: this is what the
12959 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12960 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12961 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12963 /* Look for specific sections that we need. */
12964 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12966 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12967 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
12969 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12971 dwp_file
->sections
.info
.s
.section
= sectp
;
12972 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
12974 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12976 dwp_file
->sections
.line
.s
.section
= sectp
;
12977 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
12979 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12981 dwp_file
->sections
.loc
.s
.section
= sectp
;
12982 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
12984 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12986 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
12987 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
12989 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12991 dwp_file
->sections
.macro
.s
.section
= sectp
;
12992 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
12994 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12996 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
12997 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
12999 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
13001 dwp_file
->sections
.types
.s
.section
= sectp
;
13002 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
13006 /* Hash function for dwp_file loaded CUs/TUs. */
13009 hash_dwp_loaded_cutus (const void *item
)
13011 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
13013 /* This drops the top 32 bits of the signature, but is ok for a hash. */
13014 return dwo_unit
->signature
;
13017 /* Equality function for dwp_file loaded CUs/TUs. */
13020 eq_dwp_loaded_cutus (const void *a
, const void *b
)
13022 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
13023 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
13025 return dua
->signature
== dub
->signature
;
13028 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
13031 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
13033 return htab_create_alloc_ex (3,
13034 hash_dwp_loaded_cutus
,
13035 eq_dwp_loaded_cutus
,
13037 &objfile
->objfile_obstack
,
13038 hashtab_obstack_allocate
,
13039 dummy_obstack_deallocate
);
13042 /* Try to open DWP file FILE_NAME.
13043 The result is the bfd handle of the file.
13044 If there is a problem finding or opening the file, return NULL.
13045 Upon success, the canonicalized path of the file is stored in the bfd,
13046 same as symfile_bfd_open. */
13048 static gdb_bfd_ref_ptr
13049 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
13050 const char *file_name
)
13052 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
13054 1 /*search_cwd*/));
13058 /* Work around upstream bug 15652.
13059 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
13060 [Whether that's a "bug" is debatable, but it is getting in our way.]
13061 We have no real idea where the dwp file is, because gdb's realpath-ing
13062 of the executable's path may have discarded the needed info.
13063 [IWBN if the dwp file name was recorded in the executable, akin to
13064 .gnu_debuglink, but that doesn't exist yet.]
13065 Strip the directory from FILE_NAME and search again. */
13066 if (*debug_file_directory
!= '\0')
13068 /* Don't implicitly search the current directory here.
13069 If the user wants to search "." to handle this case,
13070 it must be added to debug-file-directory. */
13071 return try_open_dwop_file (dwarf2_per_objfile
,
13072 lbasename (file_name
), 1 /*is_dwp*/,
13079 /* Initialize the use of the DWP file for the current objfile.
13080 By convention the name of the DWP file is ${objfile}.dwp.
13081 The result is NULL if it can't be found. */
13083 static struct dwp_file
*
13084 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13086 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13087 struct dwp_file
*dwp_file
;
13089 /* Try to find first .dwp for the binary file before any symbolic links
13092 /* If the objfile is a debug file, find the name of the real binary
13093 file and get the name of dwp file from there. */
13094 std::string dwp_name
;
13095 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
13097 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
13098 const char *backlink_basename
= lbasename (backlink
->original_name
);
13100 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
13103 dwp_name
= objfile
->original_name
;
13105 dwp_name
+= ".dwp";
13107 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
13109 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
13111 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
13112 dwp_name
= objfile_name (objfile
);
13113 dwp_name
+= ".dwp";
13114 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
13119 if (dwarf_read_debug
)
13120 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
13123 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
13124 dwp_file
->name
= bfd_get_filename (dbfd
.get ());
13125 dwp_file
->dbfd
= dbfd
.release ();
13127 /* +1: section 0 is unused */
13128 dwp_file
->num_sections
= bfd_count_sections (dwp_file
->dbfd
) + 1;
13129 dwp_file
->elf_sections
=
13130 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
13131 dwp_file
->num_sections
, asection
*);
13133 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_common_dwp_sections
,
13136 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
, 0);
13138 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
, 1);
13140 /* The DWP file version is stored in the hash table. Oh well. */
13141 if (dwp_file
->cus
&& dwp_file
->tus
13142 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
13144 /* Technically speaking, we should try to limp along, but this is
13145 pretty bizarre. We use pulongest here because that's the established
13146 portability solution (e.g, we cannot use %u for uint32_t). */
13147 error (_("Dwarf Error: DWP file CU version %s doesn't match"
13148 " TU version %s [in DWP file %s]"),
13149 pulongest (dwp_file
->cus
->version
),
13150 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
13154 dwp_file
->version
= dwp_file
->cus
->version
;
13155 else if (dwp_file
->tus
)
13156 dwp_file
->version
= dwp_file
->tus
->version
;
13158 dwp_file
->version
= 2;
13160 if (dwp_file
->version
== 2)
13161 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_v2_dwp_sections
,
13164 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
13165 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
13167 if (dwarf_read_debug
)
13169 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
13170 fprintf_unfiltered (gdb_stdlog
,
13171 " %s CUs, %s TUs\n",
13172 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
13173 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
13179 /* Wrapper around open_and_init_dwp_file, only open it once. */
13181 static struct dwp_file
*
13182 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13184 if (! dwarf2_per_objfile
->dwp_checked
)
13186 dwarf2_per_objfile
->dwp_file
13187 = open_and_init_dwp_file (dwarf2_per_objfile
);
13188 dwarf2_per_objfile
->dwp_checked
= 1;
13190 return dwarf2_per_objfile
->dwp_file
;
13193 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
13194 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
13195 or in the DWP file for the objfile, referenced by THIS_UNIT.
13196 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
13197 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
13199 This is called, for example, when wanting to read a variable with a
13200 complex location. Therefore we don't want to do file i/o for every call.
13201 Therefore we don't want to look for a DWO file on every call.
13202 Therefore we first see if we've already seen SIGNATURE in a DWP file,
13203 then we check if we've already seen DWO_NAME, and only THEN do we check
13206 The result is a pointer to the dwo_unit object or NULL if we didn't find it
13207 (dwo_id mismatch or couldn't find the DWO/DWP file). */
13209 static struct dwo_unit
*
13210 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
13211 const char *dwo_name
, const char *comp_dir
,
13212 ULONGEST signature
, int is_debug_types
)
13214 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
13215 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13216 const char *kind
= is_debug_types
? "TU" : "CU";
13217 void **dwo_file_slot
;
13218 struct dwo_file
*dwo_file
;
13219 struct dwp_file
*dwp_file
;
13221 /* First see if there's a DWP file.
13222 If we have a DWP file but didn't find the DWO inside it, don't
13223 look for the original DWO file. It makes gdb behave differently
13224 depending on whether one is debugging in the build tree. */
13226 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
13227 if (dwp_file
!= NULL
)
13229 const struct dwp_hash_table
*dwp_htab
=
13230 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
13232 if (dwp_htab
!= NULL
)
13234 struct dwo_unit
*dwo_cutu
=
13235 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
13236 signature
, is_debug_types
);
13238 if (dwo_cutu
!= NULL
)
13240 if (dwarf_read_debug
)
13242 fprintf_unfiltered (gdb_stdlog
,
13243 "Virtual DWO %s %s found: @%s\n",
13244 kind
, hex_string (signature
),
13245 host_address_to_string (dwo_cutu
));
13253 /* No DWP file, look for the DWO file. */
13255 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
13256 dwo_name
, comp_dir
);
13257 if (*dwo_file_slot
== NULL
)
13259 /* Read in the file and build a table of the CUs/TUs it contains. */
13260 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
13262 /* NOTE: This will be NULL if unable to open the file. */
13263 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
13265 if (dwo_file
!= NULL
)
13267 struct dwo_unit
*dwo_cutu
= NULL
;
13269 if (is_debug_types
&& dwo_file
->tus
)
13271 struct dwo_unit find_dwo_cutu
;
13273 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13274 find_dwo_cutu
.signature
= signature
;
13276 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
13278 else if (!is_debug_types
&& dwo_file
->cus
)
13280 struct dwo_unit find_dwo_cutu
;
13282 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13283 find_dwo_cutu
.signature
= signature
;
13284 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
13288 if (dwo_cutu
!= NULL
)
13290 if (dwarf_read_debug
)
13292 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
13293 kind
, dwo_name
, hex_string (signature
),
13294 host_address_to_string (dwo_cutu
));
13301 /* We didn't find it. This could mean a dwo_id mismatch, or
13302 someone deleted the DWO/DWP file, or the search path isn't set up
13303 correctly to find the file. */
13305 if (dwarf_read_debug
)
13307 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
13308 kind
, dwo_name
, hex_string (signature
));
13311 /* This is a warning and not a complaint because it can be caused by
13312 pilot error (e.g., user accidentally deleting the DWO). */
13314 /* Print the name of the DWP file if we looked there, helps the user
13315 better diagnose the problem. */
13316 std::string dwp_text
;
13318 if (dwp_file
!= NULL
)
13319 dwp_text
= string_printf (" [in DWP file %s]",
13320 lbasename (dwp_file
->name
));
13322 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
13323 " [in module %s]"),
13324 kind
, dwo_name
, hex_string (signature
),
13326 this_unit
->is_debug_types
? "TU" : "CU",
13327 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
13332 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
13333 See lookup_dwo_cutu_unit for details. */
13335 static struct dwo_unit
*
13336 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
13337 const char *dwo_name
, const char *comp_dir
,
13338 ULONGEST signature
)
13340 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
13343 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
13344 See lookup_dwo_cutu_unit for details. */
13346 static struct dwo_unit
*
13347 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
13348 const char *dwo_name
, const char *comp_dir
)
13350 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
13353 /* Traversal function for queue_and_load_all_dwo_tus. */
13356 queue_and_load_dwo_tu (void **slot
, void *info
)
13358 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
13359 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
13360 ULONGEST signature
= dwo_unit
->signature
;
13361 struct signatured_type
*sig_type
=
13362 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
13364 if (sig_type
!= NULL
)
13366 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
13368 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
13369 a real dependency of PER_CU on SIG_TYPE. That is detected later
13370 while processing PER_CU. */
13371 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
13372 load_full_type_unit (sig_cu
);
13373 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
13379 /* Queue all TUs contained in the DWO of PER_CU to be read in.
13380 The DWO may have the only definition of the type, though it may not be
13381 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
13382 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
13385 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
13387 struct dwo_unit
*dwo_unit
;
13388 struct dwo_file
*dwo_file
;
13390 gdb_assert (!per_cu
->is_debug_types
);
13391 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
13392 gdb_assert (per_cu
->cu
!= NULL
);
13394 dwo_unit
= per_cu
->cu
->dwo_unit
;
13395 gdb_assert (dwo_unit
!= NULL
);
13397 dwo_file
= dwo_unit
->dwo_file
;
13398 if (dwo_file
->tus
!= NULL
)
13399 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
13402 /* Free all resources associated with DWO_FILE.
13403 Close the DWO file and munmap the sections. */
13406 free_dwo_file (struct dwo_file
*dwo_file
)
13408 /* Note: dbfd is NULL for virtual DWO files. */
13409 gdb_bfd_unref (dwo_file
->dbfd
);
13411 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
13414 /* Traversal function for free_dwo_files. */
13417 free_dwo_file_from_slot (void **slot
, void *info
)
13419 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
13421 free_dwo_file (dwo_file
);
13426 /* Free all resources associated with DWO_FILES. */
13429 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
13431 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
13434 /* Read in various DIEs. */
13436 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
13437 Inherit only the children of the DW_AT_abstract_origin DIE not being
13438 already referenced by DW_AT_abstract_origin from the children of the
13442 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
13444 struct die_info
*child_die
;
13445 sect_offset
*offsetp
;
13446 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
13447 struct die_info
*origin_die
;
13448 /* Iterator of the ORIGIN_DIE children. */
13449 struct die_info
*origin_child_die
;
13450 struct attribute
*attr
;
13451 struct dwarf2_cu
*origin_cu
;
13452 struct pending
**origin_previous_list_in_scope
;
13454 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13458 /* Note that following die references may follow to a die in a
13462 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
13464 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
13466 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
13467 origin_cu
->list_in_scope
= cu
->list_in_scope
;
13469 if (die
->tag
!= origin_die
->tag
13470 && !(die
->tag
== DW_TAG_inlined_subroutine
13471 && origin_die
->tag
== DW_TAG_subprogram
))
13472 complaint (&symfile_complaints
,
13473 _("DIE %s and its abstract origin %s have different tags"),
13474 sect_offset_str (die
->sect_off
),
13475 sect_offset_str (origin_die
->sect_off
));
13477 std::vector
<sect_offset
> offsets
;
13479 for (child_die
= die
->child
;
13480 child_die
&& child_die
->tag
;
13481 child_die
= sibling_die (child_die
))
13483 struct die_info
*child_origin_die
;
13484 struct dwarf2_cu
*child_origin_cu
;
13486 /* We are trying to process concrete instance entries:
13487 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
13488 it's not relevant to our analysis here. i.e. detecting DIEs that are
13489 present in the abstract instance but not referenced in the concrete
13491 if (child_die
->tag
== DW_TAG_call_site
13492 || child_die
->tag
== DW_TAG_GNU_call_site
)
13495 /* For each CHILD_DIE, find the corresponding child of
13496 ORIGIN_DIE. If there is more than one layer of
13497 DW_AT_abstract_origin, follow them all; there shouldn't be,
13498 but GCC versions at least through 4.4 generate this (GCC PR
13500 child_origin_die
= child_die
;
13501 child_origin_cu
= cu
;
13504 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
13508 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
13512 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
13513 counterpart may exist. */
13514 if (child_origin_die
!= child_die
)
13516 if (child_die
->tag
!= child_origin_die
->tag
13517 && !(child_die
->tag
== DW_TAG_inlined_subroutine
13518 && child_origin_die
->tag
== DW_TAG_subprogram
))
13519 complaint (&symfile_complaints
,
13520 _("Child DIE %s and its abstract origin %s have "
13522 sect_offset_str (child_die
->sect_off
),
13523 sect_offset_str (child_origin_die
->sect_off
));
13524 if (child_origin_die
->parent
!= origin_die
)
13525 complaint (&symfile_complaints
,
13526 _("Child DIE %s and its abstract origin %s have "
13527 "different parents"),
13528 sect_offset_str (child_die
->sect_off
),
13529 sect_offset_str (child_origin_die
->sect_off
));
13531 offsets
.push_back (child_origin_die
->sect_off
);
13534 std::sort (offsets
.begin (), offsets
.end ());
13535 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
13536 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
13537 if (offsetp
[-1] == *offsetp
)
13538 complaint (&symfile_complaints
,
13539 _("Multiple children of DIE %s refer "
13540 "to DIE %s as their abstract origin"),
13541 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
13543 offsetp
= offsets
.data ();
13544 origin_child_die
= origin_die
->child
;
13545 while (origin_child_die
&& origin_child_die
->tag
)
13547 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13548 while (offsetp
< offsets_end
13549 && *offsetp
< origin_child_die
->sect_off
)
13551 if (offsetp
>= offsets_end
13552 || *offsetp
> origin_child_die
->sect_off
)
13554 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13555 Check whether we're already processing ORIGIN_CHILD_DIE.
13556 This can happen with mutually referenced abstract_origins.
13558 if (!origin_child_die
->in_process
)
13559 process_die (origin_child_die
, origin_cu
);
13561 origin_child_die
= sibling_die (origin_child_die
);
13563 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13567 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13569 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13570 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13571 struct context_stack
*newobj
;
13574 struct die_info
*child_die
;
13575 struct attribute
*attr
, *call_line
, *call_file
;
13577 CORE_ADDR baseaddr
;
13578 struct block
*block
;
13579 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13580 std::vector
<struct symbol
*> template_args
;
13581 struct template_symbol
*templ_func
= NULL
;
13585 /* If we do not have call site information, we can't show the
13586 caller of this inlined function. That's too confusing, so
13587 only use the scope for local variables. */
13588 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13589 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13590 if (call_line
== NULL
|| call_file
== NULL
)
13592 read_lexical_block_scope (die
, cu
);
13597 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13599 name
= dwarf2_name (die
, cu
);
13601 /* Ignore functions with missing or empty names. These are actually
13602 illegal according to the DWARF standard. */
13605 complaint (&symfile_complaints
,
13606 _("missing name for subprogram DIE at %s"),
13607 sect_offset_str (die
->sect_off
));
13611 /* Ignore functions with missing or invalid low and high pc attributes. */
13612 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13613 <= PC_BOUNDS_INVALID
)
13615 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13616 if (!attr
|| !DW_UNSND (attr
))
13617 complaint (&symfile_complaints
,
13618 _("cannot get low and high bounds "
13619 "for subprogram DIE at %s"),
13620 sect_offset_str (die
->sect_off
));
13624 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13625 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13627 /* If we have any template arguments, then we must allocate a
13628 different sort of symbol. */
13629 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
13631 if (child_die
->tag
== DW_TAG_template_type_param
13632 || child_die
->tag
== DW_TAG_template_value_param
)
13634 templ_func
= allocate_template_symbol (objfile
);
13635 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13640 newobj
= push_context (0, lowpc
);
13641 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13642 (struct symbol
*) templ_func
);
13644 /* If there is a location expression for DW_AT_frame_base, record
13646 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13648 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13650 /* If there is a location for the static link, record it. */
13651 newobj
->static_link
= NULL
;
13652 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13655 newobj
->static_link
13656 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13657 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
13660 cu
->list_in_scope
= &local_symbols
;
13662 if (die
->child
!= NULL
)
13664 child_die
= die
->child
;
13665 while (child_die
&& child_die
->tag
)
13667 if (child_die
->tag
== DW_TAG_template_type_param
13668 || child_die
->tag
== DW_TAG_template_value_param
)
13670 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13673 template_args
.push_back (arg
);
13676 process_die (child_die
, cu
);
13677 child_die
= sibling_die (child_die
);
13681 inherit_abstract_dies (die
, cu
);
13683 /* If we have a DW_AT_specification, we might need to import using
13684 directives from the context of the specification DIE. See the
13685 comment in determine_prefix. */
13686 if (cu
->language
== language_cplus
13687 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13689 struct dwarf2_cu
*spec_cu
= cu
;
13690 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13694 child_die
= spec_die
->child
;
13695 while (child_die
&& child_die
->tag
)
13697 if (child_die
->tag
== DW_TAG_imported_module
)
13698 process_die (child_die
, spec_cu
);
13699 child_die
= sibling_die (child_die
);
13702 /* In some cases, GCC generates specification DIEs that
13703 themselves contain DW_AT_specification attributes. */
13704 spec_die
= die_specification (spec_die
, &spec_cu
);
13708 newobj
= pop_context ();
13709 /* Make a block for the local symbols within. */
13710 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
13711 newobj
->static_link
, lowpc
, highpc
);
13713 /* For C++, set the block's scope. */
13714 if ((cu
->language
== language_cplus
13715 || cu
->language
== language_fortran
13716 || cu
->language
== language_d
13717 || cu
->language
== language_rust
)
13718 && cu
->processing_has_namespace_info
)
13719 block_set_scope (block
, determine_prefix (die
, cu
),
13720 &objfile
->objfile_obstack
);
13722 /* If we have address ranges, record them. */
13723 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13725 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
13727 /* Attach template arguments to function. */
13728 if (!template_args
.empty ())
13730 gdb_assert (templ_func
!= NULL
);
13732 templ_func
->n_template_arguments
= template_args
.size ();
13733 templ_func
->template_arguments
13734 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13735 templ_func
->n_template_arguments
);
13736 memcpy (templ_func
->template_arguments
,
13737 template_args
.data (),
13738 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13741 /* In C++, we can have functions nested inside functions (e.g., when
13742 a function declares a class that has methods). This means that
13743 when we finish processing a function scope, we may need to go
13744 back to building a containing block's symbol lists. */
13745 local_symbols
= newobj
->locals
;
13746 local_using_directives
= newobj
->local_using_directives
;
13748 /* If we've finished processing a top-level function, subsequent
13749 symbols go in the file symbol list. */
13750 if (outermost_context_p ())
13751 cu
->list_in_scope
= &file_symbols
;
13754 /* Process all the DIES contained within a lexical block scope. Start
13755 a new scope, process the dies, and then close the scope. */
13758 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13760 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13761 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13762 struct context_stack
*newobj
;
13763 CORE_ADDR lowpc
, highpc
;
13764 struct die_info
*child_die
;
13765 CORE_ADDR baseaddr
;
13767 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13769 /* Ignore blocks with missing or invalid low and high pc attributes. */
13770 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13771 as multiple lexical blocks? Handling children in a sane way would
13772 be nasty. Might be easier to properly extend generic blocks to
13773 describe ranges. */
13774 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13776 case PC_BOUNDS_NOT_PRESENT
:
13777 /* DW_TAG_lexical_block has no attributes, process its children as if
13778 there was no wrapping by that DW_TAG_lexical_block.
13779 GCC does no longer produces such DWARF since GCC r224161. */
13780 for (child_die
= die
->child
;
13781 child_die
!= NULL
&& child_die
->tag
;
13782 child_die
= sibling_die (child_die
))
13783 process_die (child_die
, cu
);
13785 case PC_BOUNDS_INVALID
:
13788 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13789 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13791 push_context (0, lowpc
);
13792 if (die
->child
!= NULL
)
13794 child_die
= die
->child
;
13795 while (child_die
&& child_die
->tag
)
13797 process_die (child_die
, cu
);
13798 child_die
= sibling_die (child_die
);
13801 inherit_abstract_dies (die
, cu
);
13802 newobj
= pop_context ();
13804 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
13806 struct block
*block
13807 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
13808 newobj
->start_addr
, highpc
);
13810 /* Note that recording ranges after traversing children, as we
13811 do here, means that recording a parent's ranges entails
13812 walking across all its children's ranges as they appear in
13813 the address map, which is quadratic behavior.
13815 It would be nicer to record the parent's ranges before
13816 traversing its children, simply overriding whatever you find
13817 there. But since we don't even decide whether to create a
13818 block until after we've traversed its children, that's hard
13820 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13822 local_symbols
= newobj
->locals
;
13823 local_using_directives
= newobj
->local_using_directives
;
13826 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13829 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13831 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13832 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13833 CORE_ADDR pc
, baseaddr
;
13834 struct attribute
*attr
;
13835 struct call_site
*call_site
, call_site_local
;
13838 struct die_info
*child_die
;
13840 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13842 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13845 /* This was a pre-DWARF-5 GNU extension alias
13846 for DW_AT_call_return_pc. */
13847 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13851 complaint (&symfile_complaints
,
13852 _("missing DW_AT_call_return_pc for DW_TAG_call_site "
13853 "DIE %s [in module %s]"),
13854 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13857 pc
= attr_value_as_address (attr
) + baseaddr
;
13858 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13860 if (cu
->call_site_htab
== NULL
)
13861 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13862 NULL
, &objfile
->objfile_obstack
,
13863 hashtab_obstack_allocate
, NULL
);
13864 call_site_local
.pc
= pc
;
13865 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13868 complaint (&symfile_complaints
,
13869 _("Duplicate PC %s for DW_TAG_call_site "
13870 "DIE %s [in module %s]"),
13871 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13872 objfile_name (objfile
));
13876 /* Count parameters at the caller. */
13879 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13880 child_die
= sibling_die (child_die
))
13882 if (child_die
->tag
!= DW_TAG_call_site_parameter
13883 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13885 complaint (&symfile_complaints
,
13886 _("Tag %d is not DW_TAG_call_site_parameter in "
13887 "DW_TAG_call_site child DIE %s [in module %s]"),
13888 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13889 objfile_name (objfile
));
13897 = ((struct call_site
*)
13898 obstack_alloc (&objfile
->objfile_obstack
,
13899 sizeof (*call_site
)
13900 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13902 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13903 call_site
->pc
= pc
;
13905 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13906 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13908 struct die_info
*func_die
;
13910 /* Skip also over DW_TAG_inlined_subroutine. */
13911 for (func_die
= die
->parent
;
13912 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13913 && func_die
->tag
!= DW_TAG_subroutine_type
;
13914 func_die
= func_die
->parent
);
13916 /* DW_AT_call_all_calls is a superset
13917 of DW_AT_call_all_tail_calls. */
13919 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13920 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13921 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13922 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13924 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13925 not complete. But keep CALL_SITE for look ups via call_site_htab,
13926 both the initial caller containing the real return address PC and
13927 the final callee containing the current PC of a chain of tail
13928 calls do not need to have the tail call list complete. But any
13929 function candidate for a virtual tail call frame searched via
13930 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13931 determined unambiguously. */
13935 struct type
*func_type
= NULL
;
13938 func_type
= get_die_type (func_die
, cu
);
13939 if (func_type
!= NULL
)
13941 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
13943 /* Enlist this call site to the function. */
13944 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13945 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13948 complaint (&symfile_complaints
,
13949 _("Cannot find function owning DW_TAG_call_site "
13950 "DIE %s [in module %s]"),
13951 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13955 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13957 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13959 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13962 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13963 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13965 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
13966 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
13967 /* Keep NULL DWARF_BLOCK. */;
13968 else if (attr_form_is_block (attr
))
13970 struct dwarf2_locexpr_baton
*dlbaton
;
13972 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13973 dlbaton
->data
= DW_BLOCK (attr
)->data
;
13974 dlbaton
->size
= DW_BLOCK (attr
)->size
;
13975 dlbaton
->per_cu
= cu
->per_cu
;
13977 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
13979 else if (attr_form_is_ref (attr
))
13981 struct dwarf2_cu
*target_cu
= cu
;
13982 struct die_info
*target_die
;
13984 target_die
= follow_die_ref (die
, attr
, &target_cu
);
13985 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
13986 if (die_is_declaration (target_die
, target_cu
))
13988 const char *target_physname
;
13990 /* Prefer the mangled name; otherwise compute the demangled one. */
13991 target_physname
= dw2_linkage_name (target_die
, target_cu
);
13992 if (target_physname
== NULL
)
13993 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
13994 if (target_physname
== NULL
)
13995 complaint (&symfile_complaints
,
13996 _("DW_AT_call_target target DIE has invalid "
13997 "physname, for referencing DIE %s [in module %s]"),
13998 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14000 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
14006 /* DW_AT_entry_pc should be preferred. */
14007 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
14008 <= PC_BOUNDS_INVALID
)
14009 complaint (&symfile_complaints
,
14010 _("DW_AT_call_target target DIE has invalid "
14011 "low pc, for referencing DIE %s [in module %s]"),
14012 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14015 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
14016 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
14021 complaint (&symfile_complaints
,
14022 _("DW_TAG_call_site DW_AT_call_target is neither "
14023 "block nor reference, for DIE %s [in module %s]"),
14024 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14026 call_site
->per_cu
= cu
->per_cu
;
14028 for (child_die
= die
->child
;
14029 child_die
&& child_die
->tag
;
14030 child_die
= sibling_die (child_die
))
14032 struct call_site_parameter
*parameter
;
14033 struct attribute
*loc
, *origin
;
14035 if (child_die
->tag
!= DW_TAG_call_site_parameter
14036 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14038 /* Already printed the complaint above. */
14042 gdb_assert (call_site
->parameter_count
< nparams
);
14043 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
14045 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
14046 specifies DW_TAG_formal_parameter. Value of the data assumed for the
14047 register is contained in DW_AT_call_value. */
14049 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
14050 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
14051 if (origin
== NULL
)
14053 /* This was a pre-DWARF-5 GNU extension alias
14054 for DW_AT_call_parameter. */
14055 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
14057 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
14059 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
14061 sect_offset sect_off
14062 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
14063 if (!offset_in_cu_p (&cu
->header
, sect_off
))
14065 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
14066 binding can be done only inside one CU. Such referenced DIE
14067 therefore cannot be even moved to DW_TAG_partial_unit. */
14068 complaint (&symfile_complaints
,
14069 _("DW_AT_call_parameter offset is not in CU for "
14070 "DW_TAG_call_site child DIE %s [in module %s]"),
14071 sect_offset_str (child_die
->sect_off
),
14072 objfile_name (objfile
));
14075 parameter
->u
.param_cu_off
14076 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
14078 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
14080 complaint (&symfile_complaints
,
14081 _("No DW_FORM_block* DW_AT_location for "
14082 "DW_TAG_call_site child DIE %s [in module %s]"),
14083 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
14088 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
14089 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
14090 if (parameter
->u
.dwarf_reg
!= -1)
14091 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
14092 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
14093 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
14094 ¶meter
->u
.fb_offset
))
14095 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
14098 complaint (&symfile_complaints
,
14099 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
14100 "for DW_FORM_block* DW_AT_location is supported for "
14101 "DW_TAG_call_site child DIE %s "
14103 sect_offset_str (child_die
->sect_off
),
14104 objfile_name (objfile
));
14109 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
14111 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
14112 if (!attr_form_is_block (attr
))
14114 complaint (&symfile_complaints
,
14115 _("No DW_FORM_block* DW_AT_call_value for "
14116 "DW_TAG_call_site child DIE %s [in module %s]"),
14117 sect_offset_str (child_die
->sect_off
),
14118 objfile_name (objfile
));
14121 parameter
->value
= DW_BLOCK (attr
)->data
;
14122 parameter
->value_size
= DW_BLOCK (attr
)->size
;
14124 /* Parameters are not pre-cleared by memset above. */
14125 parameter
->data_value
= NULL
;
14126 parameter
->data_value_size
= 0;
14127 call_site
->parameter_count
++;
14129 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
14131 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
14134 if (!attr_form_is_block (attr
))
14135 complaint (&symfile_complaints
,
14136 _("No DW_FORM_block* DW_AT_call_data_value for "
14137 "DW_TAG_call_site child DIE %s [in module %s]"),
14138 sect_offset_str (child_die
->sect_off
),
14139 objfile_name (objfile
));
14142 parameter
->data_value
= DW_BLOCK (attr
)->data
;
14143 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
14149 /* Helper function for read_variable. If DIE represents a virtual
14150 table, then return the type of the concrete object that is
14151 associated with the virtual table. Otherwise, return NULL. */
14153 static struct type
*
14154 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14156 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14160 /* Find the type DIE. */
14161 struct die_info
*type_die
= NULL
;
14162 struct dwarf2_cu
*type_cu
= cu
;
14164 if (attr_form_is_ref (attr
))
14165 type_die
= follow_die_ref (die
, attr
, &type_cu
);
14166 if (type_die
== NULL
)
14169 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
14171 return die_containing_type (type_die
, type_cu
);
14174 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
14177 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
14179 struct rust_vtable_symbol
*storage
= NULL
;
14181 if (cu
->language
== language_rust
)
14183 struct type
*containing_type
= rust_containing_type (die
, cu
);
14185 if (containing_type
!= NULL
)
14187 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14189 storage
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
14190 struct rust_vtable_symbol
);
14191 initialize_objfile_symbol (storage
);
14192 storage
->concrete_type
= containing_type
;
14193 storage
->subclass
= SYMBOL_RUST_VTABLE
;
14197 new_symbol (die
, NULL
, cu
, storage
);
14200 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
14201 reading .debug_rnglists.
14202 Callback's type should be:
14203 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14204 Return true if the attributes are present and valid, otherwise,
14207 template <typename Callback
>
14209 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
14210 Callback
&&callback
)
14212 struct dwarf2_per_objfile
*dwarf2_per_objfile
14213 = cu
->per_cu
->dwarf2_per_objfile
;
14214 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14215 bfd
*obfd
= objfile
->obfd
;
14216 /* Base address selection entry. */
14219 const gdb_byte
*buffer
;
14220 CORE_ADDR baseaddr
;
14221 bool overflow
= false;
14223 found_base
= cu
->base_known
;
14224 base
= cu
->base_address
;
14226 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
14227 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
14229 complaint (&symfile_complaints
,
14230 _("Offset %d out of bounds for DW_AT_ranges attribute"),
14234 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
14236 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14240 /* Initialize it due to a false compiler warning. */
14241 CORE_ADDR range_beginning
= 0, range_end
= 0;
14242 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
14243 + dwarf2_per_objfile
->rnglists
.size
);
14244 unsigned int bytes_read
;
14246 if (buffer
== buf_end
)
14251 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
14254 case DW_RLE_end_of_list
:
14256 case DW_RLE_base_address
:
14257 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14262 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14264 buffer
+= bytes_read
;
14266 case DW_RLE_start_length
:
14267 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14272 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14273 buffer
+= bytes_read
;
14274 range_end
= (range_beginning
14275 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
14276 buffer
+= bytes_read
;
14277 if (buffer
> buf_end
)
14283 case DW_RLE_offset_pair
:
14284 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14285 buffer
+= bytes_read
;
14286 if (buffer
> buf_end
)
14291 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14292 buffer
+= bytes_read
;
14293 if (buffer
> buf_end
)
14299 case DW_RLE_start_end
:
14300 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
14305 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14306 buffer
+= bytes_read
;
14307 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14308 buffer
+= bytes_read
;
14311 complaint (&symfile_complaints
,
14312 _("Invalid .debug_rnglists data (no base address)"));
14315 if (rlet
== DW_RLE_end_of_list
|| overflow
)
14317 if (rlet
== DW_RLE_base_address
)
14322 /* We have no valid base address for the ranges
14324 complaint (&symfile_complaints
,
14325 _("Invalid .debug_rnglists data (no base address)"));
14329 if (range_beginning
> range_end
)
14331 /* Inverted range entries are invalid. */
14332 complaint (&symfile_complaints
,
14333 _("Invalid .debug_rnglists data (inverted range)"));
14337 /* Empty range entries have no effect. */
14338 if (range_beginning
== range_end
)
14341 range_beginning
+= base
;
14344 /* A not-uncommon case of bad debug info.
14345 Don't pollute the addrmap with bad data. */
14346 if (range_beginning
+ baseaddr
== 0
14347 && !dwarf2_per_objfile
->has_section_at_zero
)
14349 complaint (&symfile_complaints
,
14350 _(".debug_rnglists entry has start address of zero"
14351 " [in module %s]"), objfile_name (objfile
));
14355 callback (range_beginning
, range_end
);
14360 complaint (&symfile_complaints
,
14361 _("Offset %d is not terminated "
14362 "for DW_AT_ranges attribute"),
14370 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
14371 Callback's type should be:
14372 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14373 Return 1 if the attributes are present and valid, otherwise, return 0. */
14375 template <typename Callback
>
14377 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
14378 Callback
&&callback
)
14380 struct dwarf2_per_objfile
*dwarf2_per_objfile
14381 = cu
->per_cu
->dwarf2_per_objfile
;
14382 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14383 struct comp_unit_head
*cu_header
= &cu
->header
;
14384 bfd
*obfd
= objfile
->obfd
;
14385 unsigned int addr_size
= cu_header
->addr_size
;
14386 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14387 /* Base address selection entry. */
14390 unsigned int dummy
;
14391 const gdb_byte
*buffer
;
14392 CORE_ADDR baseaddr
;
14394 if (cu_header
->version
>= 5)
14395 return dwarf2_rnglists_process (offset
, cu
, callback
);
14397 found_base
= cu
->base_known
;
14398 base
= cu
->base_address
;
14400 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
14401 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
14403 complaint (&symfile_complaints
,
14404 _("Offset %d out of bounds for DW_AT_ranges attribute"),
14408 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
14410 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14414 CORE_ADDR range_beginning
, range_end
;
14416 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
14417 buffer
+= addr_size
;
14418 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
14419 buffer
+= addr_size
;
14420 offset
+= 2 * addr_size
;
14422 /* An end of list marker is a pair of zero addresses. */
14423 if (range_beginning
== 0 && range_end
== 0)
14424 /* Found the end of list entry. */
14427 /* Each base address selection entry is a pair of 2 values.
14428 The first is the largest possible address, the second is
14429 the base address. Check for a base address here. */
14430 if ((range_beginning
& mask
) == mask
)
14432 /* If we found the largest possible address, then we already
14433 have the base address in range_end. */
14441 /* We have no valid base address for the ranges
14443 complaint (&symfile_complaints
,
14444 _("Invalid .debug_ranges data (no base address)"));
14448 if (range_beginning
> range_end
)
14450 /* Inverted range entries are invalid. */
14451 complaint (&symfile_complaints
,
14452 _("Invalid .debug_ranges data (inverted range)"));
14456 /* Empty range entries have no effect. */
14457 if (range_beginning
== range_end
)
14460 range_beginning
+= base
;
14463 /* A not-uncommon case of bad debug info.
14464 Don't pollute the addrmap with bad data. */
14465 if (range_beginning
+ baseaddr
== 0
14466 && !dwarf2_per_objfile
->has_section_at_zero
)
14468 complaint (&symfile_complaints
,
14469 _(".debug_ranges entry has start address of zero"
14470 " [in module %s]"), objfile_name (objfile
));
14474 callback (range_beginning
, range_end
);
14480 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
14481 Return 1 if the attributes are present and valid, otherwise, return 0.
14482 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
14485 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
14486 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
14487 struct partial_symtab
*ranges_pst
)
14489 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14490 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14491 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
14492 SECT_OFF_TEXT (objfile
));
14495 CORE_ADDR high
= 0;
14498 retval
= dwarf2_ranges_process (offset
, cu
,
14499 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
14501 if (ranges_pst
!= NULL
)
14506 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
14507 range_beginning
+ baseaddr
);
14508 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
14509 range_end
+ baseaddr
);
14510 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
14514 /* FIXME: This is recording everything as a low-high
14515 segment of consecutive addresses. We should have a
14516 data structure for discontiguous block ranges
14520 low
= range_beginning
;
14526 if (range_beginning
< low
)
14527 low
= range_beginning
;
14528 if (range_end
> high
)
14536 /* If the first entry is an end-of-list marker, the range
14537 describes an empty scope, i.e. no instructions. */
14543 *high_return
= high
;
14547 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14548 definition for the return value. *LOWPC and *HIGHPC are set iff
14549 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14551 static enum pc_bounds_kind
14552 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14553 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14554 struct partial_symtab
*pst
)
14556 struct dwarf2_per_objfile
*dwarf2_per_objfile
14557 = cu
->per_cu
->dwarf2_per_objfile
;
14558 struct attribute
*attr
;
14559 struct attribute
*attr_high
;
14561 CORE_ADDR high
= 0;
14562 enum pc_bounds_kind ret
;
14564 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14567 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14570 low
= attr_value_as_address (attr
);
14571 high
= attr_value_as_address (attr_high
);
14572 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14576 /* Found high w/o low attribute. */
14577 return PC_BOUNDS_INVALID
;
14579 /* Found consecutive range of addresses. */
14580 ret
= PC_BOUNDS_HIGH_LOW
;
14584 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14587 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14588 We take advantage of the fact that DW_AT_ranges does not appear
14589 in DW_TAG_compile_unit of DWO files. */
14590 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14591 unsigned int ranges_offset
= (DW_UNSND (attr
)
14592 + (need_ranges_base
14596 /* Value of the DW_AT_ranges attribute is the offset in the
14597 .debug_ranges section. */
14598 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
14599 return PC_BOUNDS_INVALID
;
14600 /* Found discontinuous range of addresses. */
14601 ret
= PC_BOUNDS_RANGES
;
14604 return PC_BOUNDS_NOT_PRESENT
;
14607 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14609 return PC_BOUNDS_INVALID
;
14611 /* When using the GNU linker, .gnu.linkonce. sections are used to
14612 eliminate duplicate copies of functions and vtables and such.
14613 The linker will arbitrarily choose one and discard the others.
14614 The AT_*_pc values for such functions refer to local labels in
14615 these sections. If the section from that file was discarded, the
14616 labels are not in the output, so the relocs get a value of 0.
14617 If this is a discarded function, mark the pc bounds as invalid,
14618 so that GDB will ignore it. */
14619 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14620 return PC_BOUNDS_INVALID
;
14628 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14629 its low and high PC addresses. Do nothing if these addresses could not
14630 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14631 and HIGHPC to the high address if greater than HIGHPC. */
14634 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14635 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14636 struct dwarf2_cu
*cu
)
14638 CORE_ADDR low
, high
;
14639 struct die_info
*child
= die
->child
;
14641 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14643 *lowpc
= std::min (*lowpc
, low
);
14644 *highpc
= std::max (*highpc
, high
);
14647 /* If the language does not allow nested subprograms (either inside
14648 subprograms or lexical blocks), we're done. */
14649 if (cu
->language
!= language_ada
)
14652 /* Check all the children of the given DIE. If it contains nested
14653 subprograms, then check their pc bounds. Likewise, we need to
14654 check lexical blocks as well, as they may also contain subprogram
14656 while (child
&& child
->tag
)
14658 if (child
->tag
== DW_TAG_subprogram
14659 || child
->tag
== DW_TAG_lexical_block
)
14660 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14661 child
= sibling_die (child
);
14665 /* Get the low and high pc's represented by the scope DIE, and store
14666 them in *LOWPC and *HIGHPC. If the correct values can't be
14667 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14670 get_scope_pc_bounds (struct die_info
*die
,
14671 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14672 struct dwarf2_cu
*cu
)
14674 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14675 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14676 CORE_ADDR current_low
, current_high
;
14678 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14679 >= PC_BOUNDS_RANGES
)
14681 best_low
= current_low
;
14682 best_high
= current_high
;
14686 struct die_info
*child
= die
->child
;
14688 while (child
&& child
->tag
)
14690 switch (child
->tag
) {
14691 case DW_TAG_subprogram
:
14692 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14694 case DW_TAG_namespace
:
14695 case DW_TAG_module
:
14696 /* FIXME: carlton/2004-01-16: Should we do this for
14697 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14698 that current GCC's always emit the DIEs corresponding
14699 to definitions of methods of classes as children of a
14700 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14701 the DIEs giving the declarations, which could be
14702 anywhere). But I don't see any reason why the
14703 standards says that they have to be there. */
14704 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14706 if (current_low
!= ((CORE_ADDR
) -1))
14708 best_low
= std::min (best_low
, current_low
);
14709 best_high
= std::max (best_high
, current_high
);
14717 child
= sibling_die (child
);
14722 *highpc
= best_high
;
14725 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14729 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14730 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14732 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14733 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14734 struct attribute
*attr
;
14735 struct attribute
*attr_high
;
14737 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14740 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14743 CORE_ADDR low
= attr_value_as_address (attr
);
14744 CORE_ADDR high
= attr_value_as_address (attr_high
);
14746 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14749 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14750 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14751 record_block_range (block
, low
, high
- 1);
14755 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14758 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14759 We take advantage of the fact that DW_AT_ranges does not appear
14760 in DW_TAG_compile_unit of DWO files. */
14761 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14763 /* The value of the DW_AT_ranges attribute is the offset of the
14764 address range list in the .debug_ranges section. */
14765 unsigned long offset
= (DW_UNSND (attr
)
14766 + (need_ranges_base
? cu
->ranges_base
: 0));
14768 dwarf2_ranges_process (offset
, cu
,
14769 [&] (CORE_ADDR start
, CORE_ADDR end
)
14773 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14774 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14775 record_block_range (block
, start
, end
- 1);
14780 /* Check whether the producer field indicates either of GCC < 4.6, or the
14781 Intel C/C++ compiler, and cache the result in CU. */
14784 check_producer (struct dwarf2_cu
*cu
)
14788 if (cu
->producer
== NULL
)
14790 /* For unknown compilers expect their behavior is DWARF version
14793 GCC started to support .debug_types sections by -gdwarf-4 since
14794 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14795 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14796 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14797 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14799 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14801 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14802 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14804 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14805 cu
->producer_is_icc_lt_14
= major
< 14;
14808 /* For other non-GCC compilers, expect their behavior is DWARF version
14812 cu
->checked_producer
= 1;
14815 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14816 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14817 during 4.6.0 experimental. */
14820 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14822 if (!cu
->checked_producer
)
14823 check_producer (cu
);
14825 return cu
->producer_is_gxx_lt_4_6
;
14828 /* Return the default accessibility type if it is not overriden by
14829 DW_AT_accessibility. */
14831 static enum dwarf_access_attribute
14832 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14834 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14836 /* The default DWARF 2 accessibility for members is public, the default
14837 accessibility for inheritance is private. */
14839 if (die
->tag
!= DW_TAG_inheritance
)
14840 return DW_ACCESS_public
;
14842 return DW_ACCESS_private
;
14846 /* DWARF 3+ defines the default accessibility a different way. The same
14847 rules apply now for DW_TAG_inheritance as for the members and it only
14848 depends on the container kind. */
14850 if (die
->parent
->tag
== DW_TAG_class_type
)
14851 return DW_ACCESS_private
;
14853 return DW_ACCESS_public
;
14857 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14858 offset. If the attribute was not found return 0, otherwise return
14859 1. If it was found but could not properly be handled, set *OFFSET
14863 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14866 struct attribute
*attr
;
14868 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14873 /* Note that we do not check for a section offset first here.
14874 This is because DW_AT_data_member_location is new in DWARF 4,
14875 so if we see it, we can assume that a constant form is really
14876 a constant and not a section offset. */
14877 if (attr_form_is_constant (attr
))
14878 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
14879 else if (attr_form_is_section_offset (attr
))
14880 dwarf2_complex_location_expr_complaint ();
14881 else if (attr_form_is_block (attr
))
14882 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14884 dwarf2_complex_location_expr_complaint ();
14892 /* Add an aggregate field to the field list. */
14895 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14896 struct dwarf2_cu
*cu
)
14898 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14899 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14900 struct nextfield
*new_field
;
14901 struct attribute
*attr
;
14903 const char *fieldname
= "";
14905 if (die
->tag
== DW_TAG_inheritance
)
14907 fip
->baseclasses
.emplace_back ();
14908 new_field
= &fip
->baseclasses
.back ();
14912 fip
->fields
.emplace_back ();
14913 new_field
= &fip
->fields
.back ();
14918 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14920 new_field
->accessibility
= DW_UNSND (attr
);
14922 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
14923 if (new_field
->accessibility
!= DW_ACCESS_public
)
14924 fip
->non_public_fields
= 1;
14926 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14928 new_field
->virtuality
= DW_UNSND (attr
);
14930 new_field
->virtuality
= DW_VIRTUALITY_none
;
14932 fp
= &new_field
->field
;
14934 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
14938 /* Data member other than a C++ static data member. */
14940 /* Get type of field. */
14941 fp
->type
= die_type (die
, cu
);
14943 SET_FIELD_BITPOS (*fp
, 0);
14945 /* Get bit size of field (zero if none). */
14946 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
14949 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
14953 FIELD_BITSIZE (*fp
) = 0;
14956 /* Get bit offset of field. */
14957 if (handle_data_member_location (die
, cu
, &offset
))
14958 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
14959 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
14962 if (gdbarch_bits_big_endian (gdbarch
))
14964 /* For big endian bits, the DW_AT_bit_offset gives the
14965 additional bit offset from the MSB of the containing
14966 anonymous object to the MSB of the field. We don't
14967 have to do anything special since we don't need to
14968 know the size of the anonymous object. */
14969 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
14973 /* For little endian bits, compute the bit offset to the
14974 MSB of the anonymous object, subtract off the number of
14975 bits from the MSB of the field to the MSB of the
14976 object, and then subtract off the number of bits of
14977 the field itself. The result is the bit offset of
14978 the LSB of the field. */
14979 int anonymous_size
;
14980 int bit_offset
= DW_UNSND (attr
);
14982 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14985 /* The size of the anonymous object containing
14986 the bit field is explicit, so use the
14987 indicated size (in bytes). */
14988 anonymous_size
= DW_UNSND (attr
);
14992 /* The size of the anonymous object containing
14993 the bit field must be inferred from the type
14994 attribute of the data member containing the
14996 anonymous_size
= TYPE_LENGTH (fp
->type
);
14998 SET_FIELD_BITPOS (*fp
,
14999 (FIELD_BITPOS (*fp
)
15000 + anonymous_size
* bits_per_byte
15001 - bit_offset
- FIELD_BITSIZE (*fp
)));
15004 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
15006 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
15007 + dwarf2_get_attr_constant_value (attr
, 0)));
15009 /* Get name of field. */
15010 fieldname
= dwarf2_name (die
, cu
);
15011 if (fieldname
== NULL
)
15014 /* The name is already allocated along with this objfile, so we don't
15015 need to duplicate it for the type. */
15016 fp
->name
= fieldname
;
15018 /* Change accessibility for artificial fields (e.g. virtual table
15019 pointer or virtual base class pointer) to private. */
15020 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
15022 FIELD_ARTIFICIAL (*fp
) = 1;
15023 new_field
->accessibility
= DW_ACCESS_private
;
15024 fip
->non_public_fields
= 1;
15027 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
15029 /* C++ static member. */
15031 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
15032 is a declaration, but all versions of G++ as of this writing
15033 (so through at least 3.2.1) incorrectly generate
15034 DW_TAG_variable tags. */
15036 const char *physname
;
15038 /* Get name of field. */
15039 fieldname
= dwarf2_name (die
, cu
);
15040 if (fieldname
== NULL
)
15043 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15045 /* Only create a symbol if this is an external value.
15046 new_symbol checks this and puts the value in the global symbol
15047 table, which we want. If it is not external, new_symbol
15048 will try to put the value in cu->list_in_scope which is wrong. */
15049 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
15051 /* A static const member, not much different than an enum as far as
15052 we're concerned, except that we can support more types. */
15053 new_symbol (die
, NULL
, cu
);
15056 /* Get physical name. */
15057 physname
= dwarf2_physname (fieldname
, die
, cu
);
15059 /* The name is already allocated along with this objfile, so we don't
15060 need to duplicate it for the type. */
15061 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
15062 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15063 FIELD_NAME (*fp
) = fieldname
;
15065 else if (die
->tag
== DW_TAG_inheritance
)
15069 /* C++ base class field. */
15070 if (handle_data_member_location (die
, cu
, &offset
))
15071 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15072 FIELD_BITSIZE (*fp
) = 0;
15073 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15074 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
15076 else if (die
->tag
== DW_TAG_variant_part
)
15078 /* process_structure_scope will treat this DIE as a union. */
15079 process_structure_scope (die
, cu
);
15081 /* The variant part is relative to the start of the enclosing
15083 SET_FIELD_BITPOS (*fp
, 0);
15084 fp
->type
= get_die_type (die
, cu
);
15085 fp
->artificial
= 1;
15086 fp
->name
= "<<variant>>";
15089 gdb_assert_not_reached ("missing case in dwarf2_add_field");
15092 /* Can the type given by DIE define another type? */
15095 type_can_define_types (const struct die_info
*die
)
15099 case DW_TAG_typedef
:
15100 case DW_TAG_class_type
:
15101 case DW_TAG_structure_type
:
15102 case DW_TAG_union_type
:
15103 case DW_TAG_enumeration_type
:
15111 /* Add a type definition defined in the scope of the FIP's class. */
15114 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
15115 struct dwarf2_cu
*cu
)
15117 struct decl_field fp
;
15118 memset (&fp
, 0, sizeof (fp
));
15120 gdb_assert (type_can_define_types (die
));
15122 /* Get name of field. NULL is okay here, meaning an anonymous type. */
15123 fp
.name
= dwarf2_name (die
, cu
);
15124 fp
.type
= read_type_die (die
, cu
);
15126 /* Save accessibility. */
15127 enum dwarf_access_attribute accessibility
;
15128 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15130 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15132 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15133 switch (accessibility
)
15135 case DW_ACCESS_public
:
15136 /* The assumed value if neither private nor protected. */
15138 case DW_ACCESS_private
:
15141 case DW_ACCESS_protected
:
15142 fp
.is_protected
= 1;
15145 complaint (&symfile_complaints
,
15146 _("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
15149 if (die
->tag
== DW_TAG_typedef
)
15150 fip
->typedef_field_list
.push_back (fp
);
15152 fip
->nested_types_list
.push_back (fp
);
15155 /* Create the vector of fields, and attach it to the type. */
15158 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
15159 struct dwarf2_cu
*cu
)
15161 int nfields
= fip
->nfields
;
15163 /* Record the field count, allocate space for the array of fields,
15164 and create blank accessibility bitfields if necessary. */
15165 TYPE_NFIELDS (type
) = nfields
;
15166 TYPE_FIELDS (type
) = (struct field
*)
15167 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
15169 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
15171 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15173 TYPE_FIELD_PRIVATE_BITS (type
) =
15174 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15175 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
15177 TYPE_FIELD_PROTECTED_BITS (type
) =
15178 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15179 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
15181 TYPE_FIELD_IGNORE_BITS (type
) =
15182 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15183 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
15186 /* If the type has baseclasses, allocate and clear a bit vector for
15187 TYPE_FIELD_VIRTUAL_BITS. */
15188 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
15190 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
15191 unsigned char *pointer
;
15193 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15194 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
15195 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
15196 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
15197 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
15200 if (TYPE_FLAG_DISCRIMINATED_UNION (type
))
15202 struct discriminant_info
*di
= alloc_discriminant_info (type
, -1, -1);
15204 for (int index
= 0; index
< nfields
; ++index
)
15206 struct nextfield
&field
= fip
->fields
[index
];
15208 if (field
.variant
.is_discriminant
)
15209 di
->discriminant_index
= index
;
15210 else if (field
.variant
.default_branch
)
15211 di
->default_index
= index
;
15213 di
->discriminants
[index
] = field
.variant
.discriminant_value
;
15217 /* Copy the saved-up fields into the field vector. */
15218 for (int i
= 0; i
< nfields
; ++i
)
15220 struct nextfield
&field
15221 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
15222 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
15224 TYPE_FIELD (type
, i
) = field
.field
;
15225 switch (field
.accessibility
)
15227 case DW_ACCESS_private
:
15228 if (cu
->language
!= language_ada
)
15229 SET_TYPE_FIELD_PRIVATE (type
, i
);
15232 case DW_ACCESS_protected
:
15233 if (cu
->language
!= language_ada
)
15234 SET_TYPE_FIELD_PROTECTED (type
, i
);
15237 case DW_ACCESS_public
:
15241 /* Unknown accessibility. Complain and treat it as public. */
15243 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
15244 field
.accessibility
);
15248 if (i
< fip
->baseclasses
.size ())
15250 switch (field
.virtuality
)
15252 case DW_VIRTUALITY_virtual
:
15253 case DW_VIRTUALITY_pure_virtual
:
15254 if (cu
->language
== language_ada
)
15255 error (_("unexpected virtuality in component of Ada type"));
15256 SET_TYPE_FIELD_VIRTUAL (type
, i
);
15263 /* Return true if this member function is a constructor, false
15267 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
15269 const char *fieldname
;
15270 const char *type_name
;
15273 if (die
->parent
== NULL
)
15276 if (die
->parent
->tag
!= DW_TAG_structure_type
15277 && die
->parent
->tag
!= DW_TAG_union_type
15278 && die
->parent
->tag
!= DW_TAG_class_type
)
15281 fieldname
= dwarf2_name (die
, cu
);
15282 type_name
= dwarf2_name (die
->parent
, cu
);
15283 if (fieldname
== NULL
|| type_name
== NULL
)
15286 len
= strlen (fieldname
);
15287 return (strncmp (fieldname
, type_name
, len
) == 0
15288 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
15291 /* Add a member function to the proper fieldlist. */
15294 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15295 struct type
*type
, struct dwarf2_cu
*cu
)
15297 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15298 struct attribute
*attr
;
15300 struct fnfieldlist
*flp
= nullptr;
15301 struct fn_field
*fnp
;
15302 const char *fieldname
;
15303 struct type
*this_type
;
15304 enum dwarf_access_attribute accessibility
;
15306 if (cu
->language
== language_ada
)
15307 error (_("unexpected member function in Ada type"));
15309 /* Get name of member function. */
15310 fieldname
= dwarf2_name (die
, cu
);
15311 if (fieldname
== NULL
)
15314 /* Look up member function name in fieldlist. */
15315 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15317 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15319 flp
= &fip
->fnfieldlists
[i
];
15324 /* Create a new fnfieldlist if necessary. */
15325 if (flp
== nullptr)
15327 fip
->fnfieldlists
.emplace_back ();
15328 flp
= &fip
->fnfieldlists
.back ();
15329 flp
->name
= fieldname
;
15330 i
= fip
->fnfieldlists
.size () - 1;
15333 /* Create a new member function field and add it to the vector of
15335 flp
->fnfields
.emplace_back ();
15336 fnp
= &flp
->fnfields
.back ();
15338 /* Delay processing of the physname until later. */
15339 if (cu
->language
== language_cplus
)
15340 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15344 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15345 fnp
->physname
= physname
? physname
: "";
15348 fnp
->type
= alloc_type (objfile
);
15349 this_type
= read_type_die (die
, cu
);
15350 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
15352 int nparams
= TYPE_NFIELDS (this_type
);
15354 /* TYPE is the domain of this method, and THIS_TYPE is the type
15355 of the method itself (TYPE_CODE_METHOD). */
15356 smash_to_method_type (fnp
->type
, type
,
15357 TYPE_TARGET_TYPE (this_type
),
15358 TYPE_FIELDS (this_type
),
15359 TYPE_NFIELDS (this_type
),
15360 TYPE_VARARGS (this_type
));
15362 /* Handle static member functions.
15363 Dwarf2 has no clean way to discern C++ static and non-static
15364 member functions. G++ helps GDB by marking the first
15365 parameter for non-static member functions (which is the this
15366 pointer) as artificial. We obtain this information from
15367 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15368 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15369 fnp
->voffset
= VOFFSET_STATIC
;
15372 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
15373 dwarf2_full_name (fieldname
, die
, cu
));
15375 /* Get fcontext from DW_AT_containing_type if present. */
15376 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15377 fnp
->fcontext
= die_containing_type (die
, cu
);
15379 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15380 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15382 /* Get accessibility. */
15383 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15385 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15387 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15388 switch (accessibility
)
15390 case DW_ACCESS_private
:
15391 fnp
->is_private
= 1;
15393 case DW_ACCESS_protected
:
15394 fnp
->is_protected
= 1;
15398 /* Check for artificial methods. */
15399 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15400 if (attr
&& DW_UNSND (attr
) != 0)
15401 fnp
->is_artificial
= 1;
15403 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15405 /* Get index in virtual function table if it is a virtual member
15406 function. For older versions of GCC, this is an offset in the
15407 appropriate virtual table, as specified by DW_AT_containing_type.
15408 For everyone else, it is an expression to be evaluated relative
15409 to the object address. */
15411 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15414 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
15416 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15418 /* Old-style GCC. */
15419 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15421 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15422 || (DW_BLOCK (attr
)->size
> 1
15423 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15424 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15426 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15427 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15428 dwarf2_complex_location_expr_complaint ();
15430 fnp
->voffset
/= cu
->header
.addr_size
;
15434 dwarf2_complex_location_expr_complaint ();
15436 if (!fnp
->fcontext
)
15438 /* If there is no `this' field and no DW_AT_containing_type,
15439 we cannot actually find a base class context for the
15441 if (TYPE_NFIELDS (this_type
) == 0
15442 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15444 complaint (&symfile_complaints
,
15445 _("cannot determine context for virtual member "
15446 "function \"%s\" (offset %s)"),
15447 fieldname
, sect_offset_str (die
->sect_off
));
15452 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15456 else if (attr_form_is_section_offset (attr
))
15458 dwarf2_complex_location_expr_complaint ();
15462 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15468 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15469 if (attr
&& DW_UNSND (attr
))
15471 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15472 complaint (&symfile_complaints
,
15473 _("Member function \"%s\" (offset %s) is virtual "
15474 "but the vtable offset is not specified"),
15475 fieldname
, sect_offset_str (die
->sect_off
));
15476 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15477 TYPE_CPLUS_DYNAMIC (type
) = 1;
15482 /* Create the vector of member function fields, and attach it to the type. */
15485 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15486 struct dwarf2_cu
*cu
)
15488 if (cu
->language
== language_ada
)
15489 error (_("unexpected member functions in Ada type"));
15491 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15492 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15494 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15496 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15498 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15499 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15501 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15502 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15503 fn_flp
->fn_fields
= (struct fn_field
*)
15504 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15506 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15507 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15510 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15513 /* Returns non-zero if NAME is the name of a vtable member in CU's
15514 language, zero otherwise. */
15516 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15518 static const char vptr
[] = "_vptr";
15520 /* Look for the C++ form of the vtable. */
15521 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15527 /* GCC outputs unnamed structures that are really pointers to member
15528 functions, with the ABI-specified layout. If TYPE describes
15529 such a structure, smash it into a member function type.
15531 GCC shouldn't do this; it should just output pointer to member DIEs.
15532 This is GCC PR debug/28767. */
15535 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15537 struct type
*pfn_type
, *self_type
, *new_type
;
15539 /* Check for a structure with no name and two children. */
15540 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15543 /* Check for __pfn and __delta members. */
15544 if (TYPE_FIELD_NAME (type
, 0) == NULL
15545 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15546 || TYPE_FIELD_NAME (type
, 1) == NULL
15547 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15550 /* Find the type of the method. */
15551 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15552 if (pfn_type
== NULL
15553 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15554 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15557 /* Look for the "this" argument. */
15558 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15559 if (TYPE_NFIELDS (pfn_type
) == 0
15560 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15561 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15564 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15565 new_type
= alloc_type (objfile
);
15566 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15567 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15568 TYPE_VARARGS (pfn_type
));
15569 smash_to_methodptr_type (type
, new_type
);
15573 /* Called when we find the DIE that starts a structure or union scope
15574 (definition) to create a type for the structure or union. Fill in
15575 the type's name and general properties; the members will not be
15576 processed until process_structure_scope. A symbol table entry for
15577 the type will also not be done until process_structure_scope (assuming
15578 the type has a name).
15580 NOTE: we need to call these functions regardless of whether or not the
15581 DIE has a DW_AT_name attribute, since it might be an anonymous
15582 structure or union. This gets the type entered into our set of
15583 user defined types. */
15585 static struct type
*
15586 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15588 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15590 struct attribute
*attr
;
15593 /* If the definition of this type lives in .debug_types, read that type.
15594 Don't follow DW_AT_specification though, that will take us back up
15595 the chain and we want to go down. */
15596 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
15599 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15601 /* The type's CU may not be the same as CU.
15602 Ensure TYPE is recorded with CU in die_type_hash. */
15603 return set_die_type (die
, type
, cu
);
15606 type
= alloc_type (objfile
);
15607 INIT_CPLUS_SPECIFIC (type
);
15609 name
= dwarf2_name (die
, cu
);
15612 if (cu
->language
== language_cplus
15613 || cu
->language
== language_d
15614 || cu
->language
== language_rust
)
15616 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15618 /* dwarf2_full_name might have already finished building the DIE's
15619 type. If so, there is no need to continue. */
15620 if (get_die_type (die
, cu
) != NULL
)
15621 return get_die_type (die
, cu
);
15623 TYPE_TAG_NAME (type
) = full_name
;
15624 if (die
->tag
== DW_TAG_structure_type
15625 || die
->tag
== DW_TAG_class_type
)
15626 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
15630 /* The name is already allocated along with this objfile, so
15631 we don't need to duplicate it for the type. */
15632 TYPE_TAG_NAME (type
) = name
;
15633 if (die
->tag
== DW_TAG_class_type
)
15634 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
15638 if (die
->tag
== DW_TAG_structure_type
)
15640 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15642 else if (die
->tag
== DW_TAG_union_type
)
15644 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15646 else if (die
->tag
== DW_TAG_variant_part
)
15648 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15649 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
15653 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15656 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15657 TYPE_DECLARED_CLASS (type
) = 1;
15659 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15662 if (attr_form_is_constant (attr
))
15663 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15666 /* For the moment, dynamic type sizes are not supported
15667 by GDB's struct type. The actual size is determined
15668 on-demand when resolving the type of a given object,
15669 so set the type's length to zero for now. Otherwise,
15670 we record an expression as the length, and that expression
15671 could lead to a very large value, which could eventually
15672 lead to us trying to allocate that much memory when creating
15673 a value of that type. */
15674 TYPE_LENGTH (type
) = 0;
15679 TYPE_LENGTH (type
) = 0;
15682 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15684 /* ICC<14 does not output the required DW_AT_declaration on
15685 incomplete types, but gives them a size of zero. */
15686 TYPE_STUB (type
) = 1;
15689 TYPE_STUB_SUPPORTED (type
) = 1;
15691 if (die_is_declaration (die
, cu
))
15692 TYPE_STUB (type
) = 1;
15693 else if (attr
== NULL
&& die
->child
== NULL
15694 && producer_is_realview (cu
->producer
))
15695 /* RealView does not output the required DW_AT_declaration
15696 on incomplete types. */
15697 TYPE_STUB (type
) = 1;
15699 /* We need to add the type field to the die immediately so we don't
15700 infinitely recurse when dealing with pointers to the structure
15701 type within the structure itself. */
15702 set_die_type (die
, type
, cu
);
15704 /* set_die_type should be already done. */
15705 set_descriptive_type (type
, die
, cu
);
15710 /* A helper for process_structure_scope that handles a single member
15714 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15715 struct field_info
*fi
,
15716 std::vector
<struct symbol
*> *template_args
,
15717 struct dwarf2_cu
*cu
)
15719 if (child_die
->tag
== DW_TAG_member
15720 || child_die
->tag
== DW_TAG_variable
15721 || child_die
->tag
== DW_TAG_variant_part
)
15723 /* NOTE: carlton/2002-11-05: A C++ static data member
15724 should be a DW_TAG_member that is a declaration, but
15725 all versions of G++ as of this writing (so through at
15726 least 3.2.1) incorrectly generate DW_TAG_variable
15727 tags for them instead. */
15728 dwarf2_add_field (fi
, child_die
, cu
);
15730 else if (child_die
->tag
== DW_TAG_subprogram
)
15732 /* Rust doesn't have member functions in the C++ sense.
15733 However, it does emit ordinary functions as children
15734 of a struct DIE. */
15735 if (cu
->language
== language_rust
)
15736 read_func_scope (child_die
, cu
);
15739 /* C++ member function. */
15740 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15743 else if (child_die
->tag
== DW_TAG_inheritance
)
15745 /* C++ base class field. */
15746 dwarf2_add_field (fi
, child_die
, cu
);
15748 else if (type_can_define_types (child_die
))
15749 dwarf2_add_type_defn (fi
, child_die
, cu
);
15750 else if (child_die
->tag
== DW_TAG_template_type_param
15751 || child_die
->tag
== DW_TAG_template_value_param
)
15753 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15756 template_args
->push_back (arg
);
15758 else if (child_die
->tag
== DW_TAG_variant
)
15760 /* In a variant we want to get the discriminant and also add a
15761 field for our sole member child. */
15762 struct attribute
*discr
= dwarf2_attr (child_die
, DW_AT_discr_value
, cu
);
15764 for (struct die_info
*variant_child
= child_die
->child
;
15765 variant_child
!= NULL
;
15766 variant_child
= sibling_die (variant_child
))
15768 if (variant_child
->tag
== DW_TAG_member
)
15770 handle_struct_member_die (variant_child
, type
, fi
,
15771 template_args
, cu
);
15772 /* Only handle the one. */
15777 /* We don't handle this but we might as well report it if we see
15779 if (dwarf2_attr (child_die
, DW_AT_discr_list
, cu
) != nullptr)
15780 complaint (&symfile_complaints
,
15781 _("DW_AT_discr_list is not supported yet"
15782 " - DIE at %s [in module %s]"),
15783 sect_offset_str (child_die
->sect_off
),
15784 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15786 /* The first field was just added, so we can stash the
15787 discriminant there. */
15788 gdb_assert (!fi
->fields
.empty ());
15790 fi
->fields
.back ().variant
.default_branch
= true;
15792 fi
->fields
.back ().variant
.discriminant_value
= DW_UNSND (discr
);
15796 /* Finish creating a structure or union type, including filling in
15797 its members and creating a symbol for it. */
15800 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15802 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15803 struct die_info
*child_die
;
15806 type
= get_die_type (die
, cu
);
15808 type
= read_structure_type (die
, cu
);
15810 /* When reading a DW_TAG_variant_part, we need to notice when we
15811 read the discriminant member, so we can record it later in the
15812 discriminant_info. */
15813 bool is_variant_part
= TYPE_FLAG_DISCRIMINATED_UNION (type
);
15814 sect_offset discr_offset
;
15816 if (is_variant_part
)
15818 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15821 /* Maybe it's a univariant form, an extension we support.
15822 In this case arrange not to check the offset. */
15823 is_variant_part
= false;
15825 else if (attr_form_is_ref (discr
))
15827 struct dwarf2_cu
*target_cu
= cu
;
15828 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15830 discr_offset
= target_die
->sect_off
;
15834 complaint (&symfile_complaints
,
15835 _("DW_AT_discr does not have DIE reference form"
15836 " - DIE at %s [in module %s]"),
15837 sect_offset_str (die
->sect_off
),
15838 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15839 is_variant_part
= false;
15843 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15845 struct field_info fi
;
15846 std::vector
<struct symbol
*> template_args
;
15848 child_die
= die
->child
;
15850 while (child_die
&& child_die
->tag
)
15852 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15854 if (is_variant_part
&& discr_offset
== child_die
->sect_off
)
15855 fi
.fields
.back ().variant
.is_discriminant
= true;
15857 child_die
= sibling_die (child_die
);
15860 /* Attach template arguments to type. */
15861 if (!template_args
.empty ())
15863 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15864 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15865 TYPE_TEMPLATE_ARGUMENTS (type
)
15866 = XOBNEWVEC (&objfile
->objfile_obstack
,
15868 TYPE_N_TEMPLATE_ARGUMENTS (type
));
15869 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
15870 template_args
.data (),
15871 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
15872 * sizeof (struct symbol
*)));
15875 /* Attach fields and member functions to the type. */
15877 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
15878 if (!fi
.fnfieldlists
.empty ())
15880 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
15882 /* Get the type which refers to the base class (possibly this
15883 class itself) which contains the vtable pointer for the current
15884 class from the DW_AT_containing_type attribute. This use of
15885 DW_AT_containing_type is a GNU extension. */
15887 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15889 struct type
*t
= die_containing_type (die
, cu
);
15891 set_type_vptr_basetype (type
, t
);
15896 /* Our own class provides vtbl ptr. */
15897 for (i
= TYPE_NFIELDS (t
) - 1;
15898 i
>= TYPE_N_BASECLASSES (t
);
15901 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
15903 if (is_vtable_name (fieldname
, cu
))
15905 set_type_vptr_fieldno (type
, i
);
15910 /* Complain if virtual function table field not found. */
15911 if (i
< TYPE_N_BASECLASSES (t
))
15912 complaint (&symfile_complaints
,
15913 _("virtual function table pointer "
15914 "not found when defining class '%s'"),
15915 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
15920 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
15923 else if (cu
->producer
15924 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
15926 /* The IBM XLC compiler does not provide direct indication
15927 of the containing type, but the vtable pointer is
15928 always named __vfp. */
15932 for (i
= TYPE_NFIELDS (type
) - 1;
15933 i
>= TYPE_N_BASECLASSES (type
);
15936 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
15938 set_type_vptr_fieldno (type
, i
);
15939 set_type_vptr_basetype (type
, type
);
15946 /* Copy fi.typedef_field_list linked list elements content into the
15947 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
15948 if (!fi
.typedef_field_list
.empty ())
15950 int count
= fi
.typedef_field_list
.size ();
15952 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15953 TYPE_TYPEDEF_FIELD_ARRAY (type
)
15954 = ((struct decl_field
*)
15956 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
15957 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
15959 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
15960 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
15963 /* Copy fi.nested_types_list linked list elements content into the
15964 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
15965 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
15967 int count
= fi
.nested_types_list
.size ();
15969 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15970 TYPE_NESTED_TYPES_ARRAY (type
)
15971 = ((struct decl_field
*)
15972 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
15973 TYPE_NESTED_TYPES_COUNT (type
) = count
;
15975 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
15976 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
15980 quirk_gcc_member_function_pointer (type
, objfile
);
15981 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
15982 cu
->rust_unions
.push_back (type
);
15984 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
15985 snapshots) has been known to create a die giving a declaration
15986 for a class that has, as a child, a die giving a definition for a
15987 nested class. So we have to process our children even if the
15988 current die is a declaration. Normally, of course, a declaration
15989 won't have any children at all. */
15991 child_die
= die
->child
;
15993 while (child_die
!= NULL
&& child_die
->tag
)
15995 if (child_die
->tag
== DW_TAG_member
15996 || child_die
->tag
== DW_TAG_variable
15997 || child_die
->tag
== DW_TAG_inheritance
15998 || child_die
->tag
== DW_TAG_template_value_param
15999 || child_die
->tag
== DW_TAG_template_type_param
)
16004 process_die (child_die
, cu
);
16006 child_die
= sibling_die (child_die
);
16009 /* Do not consider external references. According to the DWARF standard,
16010 these DIEs are identified by the fact that they have no byte_size
16011 attribute, and a declaration attribute. */
16012 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
16013 || !die_is_declaration (die
, cu
))
16014 new_symbol (die
, type
, cu
);
16017 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
16018 update TYPE using some information only available in DIE's children. */
16021 update_enumeration_type_from_children (struct die_info
*die
,
16023 struct dwarf2_cu
*cu
)
16025 struct die_info
*child_die
;
16026 int unsigned_enum
= 1;
16030 auto_obstack obstack
;
16032 for (child_die
= die
->child
;
16033 child_die
!= NULL
&& child_die
->tag
;
16034 child_die
= sibling_die (child_die
))
16036 struct attribute
*attr
;
16038 const gdb_byte
*bytes
;
16039 struct dwarf2_locexpr_baton
*baton
;
16042 if (child_die
->tag
!= DW_TAG_enumerator
)
16045 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
16049 name
= dwarf2_name (child_die
, cu
);
16051 name
= "<anonymous enumerator>";
16053 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
16054 &value
, &bytes
, &baton
);
16060 else if ((mask
& value
) != 0)
16065 /* If we already know that the enum type is neither unsigned, nor
16066 a flag type, no need to look at the rest of the enumerates. */
16067 if (!unsigned_enum
&& !flag_enum
)
16072 TYPE_UNSIGNED (type
) = 1;
16074 TYPE_FLAG_ENUM (type
) = 1;
16077 /* Given a DW_AT_enumeration_type die, set its type. We do not
16078 complete the type's fields yet, or create any symbols. */
16080 static struct type
*
16081 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16083 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16085 struct attribute
*attr
;
16088 /* If the definition of this type lives in .debug_types, read that type.
16089 Don't follow DW_AT_specification though, that will take us back up
16090 the chain and we want to go down. */
16091 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
16094 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16096 /* The type's CU may not be the same as CU.
16097 Ensure TYPE is recorded with CU in die_type_hash. */
16098 return set_die_type (die
, type
, cu
);
16101 type
= alloc_type (objfile
);
16103 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
16104 name
= dwarf2_full_name (NULL
, die
, cu
);
16106 TYPE_TAG_NAME (type
) = name
;
16108 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16111 struct type
*underlying_type
= die_type (die
, cu
);
16113 TYPE_TARGET_TYPE (type
) = underlying_type
;
16116 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16119 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16123 TYPE_LENGTH (type
) = 0;
16126 /* The enumeration DIE can be incomplete. In Ada, any type can be
16127 declared as private in the package spec, and then defined only
16128 inside the package body. Such types are known as Taft Amendment
16129 Types. When another package uses such a type, an incomplete DIE
16130 may be generated by the compiler. */
16131 if (die_is_declaration (die
, cu
))
16132 TYPE_STUB (type
) = 1;
16134 /* Finish the creation of this type by using the enum's children.
16135 We must call this even when the underlying type has been provided
16136 so that we can determine if we're looking at a "flag" enum. */
16137 update_enumeration_type_from_children (die
, type
, cu
);
16139 /* If this type has an underlying type that is not a stub, then we
16140 may use its attributes. We always use the "unsigned" attribute
16141 in this situation, because ordinarily we guess whether the type
16142 is unsigned -- but the guess can be wrong and the underlying type
16143 can tell us the reality. However, we defer to a local size
16144 attribute if one exists, because this lets the compiler override
16145 the underlying type if needed. */
16146 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16148 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
16149 if (TYPE_LENGTH (type
) == 0)
16150 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
16153 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16155 return set_die_type (die
, type
, cu
);
16158 /* Given a pointer to a die which begins an enumeration, process all
16159 the dies that define the members of the enumeration, and create the
16160 symbol for the enumeration type.
16162 NOTE: We reverse the order of the element list. */
16165 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16167 struct type
*this_type
;
16169 this_type
= get_die_type (die
, cu
);
16170 if (this_type
== NULL
)
16171 this_type
= read_enumeration_type (die
, cu
);
16173 if (die
->child
!= NULL
)
16175 struct die_info
*child_die
;
16176 struct symbol
*sym
;
16177 struct field
*fields
= NULL
;
16178 int num_fields
= 0;
16181 child_die
= die
->child
;
16182 while (child_die
&& child_die
->tag
)
16184 if (child_die
->tag
!= DW_TAG_enumerator
)
16186 process_die (child_die
, cu
);
16190 name
= dwarf2_name (child_die
, cu
);
16193 sym
= new_symbol (child_die
, this_type
, cu
);
16195 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
16197 fields
= (struct field
*)
16199 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
16200 * sizeof (struct field
));
16203 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
16204 FIELD_TYPE (fields
[num_fields
]) = NULL
;
16205 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
16206 FIELD_BITSIZE (fields
[num_fields
]) = 0;
16212 child_die
= sibling_die (child_die
);
16217 TYPE_NFIELDS (this_type
) = num_fields
;
16218 TYPE_FIELDS (this_type
) = (struct field
*)
16219 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
16220 memcpy (TYPE_FIELDS (this_type
), fields
,
16221 sizeof (struct field
) * num_fields
);
16226 /* If we are reading an enum from a .debug_types unit, and the enum
16227 is a declaration, and the enum is not the signatured type in the
16228 unit, then we do not want to add a symbol for it. Adding a
16229 symbol would in some cases obscure the true definition of the
16230 enum, giving users an incomplete type when the definition is
16231 actually available. Note that we do not want to do this for all
16232 enums which are just declarations, because C++0x allows forward
16233 enum declarations. */
16234 if (cu
->per_cu
->is_debug_types
16235 && die_is_declaration (die
, cu
))
16237 struct signatured_type
*sig_type
;
16239 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16240 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16241 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16245 new_symbol (die
, this_type
, cu
);
16248 /* Extract all information from a DW_TAG_array_type DIE and put it in
16249 the DIE's type field. For now, this only handles one dimensional
16252 static struct type
*
16253 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16255 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16256 struct die_info
*child_die
;
16258 struct type
*element_type
, *range_type
, *index_type
;
16259 struct attribute
*attr
;
16261 struct dynamic_prop
*byte_stride_prop
= NULL
;
16262 unsigned int bit_stride
= 0;
16264 element_type
= die_type (die
, cu
);
16266 /* The die_type call above may have already set the type for this DIE. */
16267 type
= get_die_type (die
, cu
);
16271 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16277 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16278 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
);
16281 complaint (&symfile_complaints
,
16282 _("unable to read array DW_AT_byte_stride "
16283 " - DIE at %s [in module %s]"),
16284 sect_offset_str (die
->sect_off
),
16285 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16286 /* Ignore this attribute. We will likely not be able to print
16287 arrays of this type correctly, but there is little we can do
16288 to help if we cannot read the attribute's value. */
16289 byte_stride_prop
= NULL
;
16293 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16295 bit_stride
= DW_UNSND (attr
);
16297 /* Irix 6.2 native cc creates array types without children for
16298 arrays with unspecified length. */
16299 if (die
->child
== NULL
)
16301 index_type
= objfile_type (objfile
)->builtin_int
;
16302 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16303 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16304 byte_stride_prop
, bit_stride
);
16305 return set_die_type (die
, type
, cu
);
16308 std::vector
<struct type
*> range_types
;
16309 child_die
= die
->child
;
16310 while (child_die
&& child_die
->tag
)
16312 if (child_die
->tag
== DW_TAG_subrange_type
)
16314 struct type
*child_type
= read_type_die (child_die
, cu
);
16316 if (child_type
!= NULL
)
16318 /* The range type was succesfully read. Save it for the
16319 array type creation. */
16320 range_types
.push_back (child_type
);
16323 child_die
= sibling_die (child_die
);
16326 /* Dwarf2 dimensions are output from left to right, create the
16327 necessary array types in backwards order. */
16329 type
= element_type
;
16331 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16335 while (i
< range_types
.size ())
16336 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16337 byte_stride_prop
, bit_stride
);
16341 size_t ndim
= range_types
.size ();
16343 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16344 byte_stride_prop
, bit_stride
);
16347 /* Understand Dwarf2 support for vector types (like they occur on
16348 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16349 array type. This is not part of the Dwarf2/3 standard yet, but a
16350 custom vendor extension. The main difference between a regular
16351 array and the vector variant is that vectors are passed by value
16353 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16355 make_vector_type (type
);
16357 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16358 implementation may choose to implement triple vectors using this
16360 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16363 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16364 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16366 complaint (&symfile_complaints
,
16367 _("DW_AT_byte_size for array type smaller "
16368 "than the total size of elements"));
16371 name
= dwarf2_name (die
, cu
);
16373 TYPE_NAME (type
) = name
;
16375 /* Install the type in the die. */
16376 set_die_type (die
, type
, cu
);
16378 /* set_die_type should be already done. */
16379 set_descriptive_type (type
, die
, cu
);
16384 static enum dwarf_array_dim_ordering
16385 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16387 struct attribute
*attr
;
16389 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16392 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16394 /* GNU F77 is a special case, as at 08/2004 array type info is the
16395 opposite order to the dwarf2 specification, but data is still
16396 laid out as per normal fortran.
16398 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16399 version checking. */
16401 if (cu
->language
== language_fortran
16402 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16404 return DW_ORD_row_major
;
16407 switch (cu
->language_defn
->la_array_ordering
)
16409 case array_column_major
:
16410 return DW_ORD_col_major
;
16411 case array_row_major
:
16413 return DW_ORD_row_major
;
16417 /* Extract all information from a DW_TAG_set_type DIE and put it in
16418 the DIE's type field. */
16420 static struct type
*
16421 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16423 struct type
*domain_type
, *set_type
;
16424 struct attribute
*attr
;
16426 domain_type
= die_type (die
, cu
);
16428 /* The die_type call above may have already set the type for this DIE. */
16429 set_type
= get_die_type (die
, cu
);
16433 set_type
= create_set_type (NULL
, domain_type
);
16435 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16437 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16439 return set_die_type (die
, set_type
, cu
);
16442 /* A helper for read_common_block that creates a locexpr baton.
16443 SYM is the symbol which we are marking as computed.
16444 COMMON_DIE is the DIE for the common block.
16445 COMMON_LOC is the location expression attribute for the common
16447 MEMBER_LOC is the location expression attribute for the particular
16448 member of the common block that we are processing.
16449 CU is the CU from which the above come. */
16452 mark_common_block_symbol_computed (struct symbol
*sym
,
16453 struct die_info
*common_die
,
16454 struct attribute
*common_loc
,
16455 struct attribute
*member_loc
,
16456 struct dwarf2_cu
*cu
)
16458 struct dwarf2_per_objfile
*dwarf2_per_objfile
16459 = cu
->per_cu
->dwarf2_per_objfile
;
16460 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16461 struct dwarf2_locexpr_baton
*baton
;
16463 unsigned int cu_off
;
16464 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
16465 LONGEST offset
= 0;
16467 gdb_assert (common_loc
&& member_loc
);
16468 gdb_assert (attr_form_is_block (common_loc
));
16469 gdb_assert (attr_form_is_block (member_loc
)
16470 || attr_form_is_constant (member_loc
));
16472 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16473 baton
->per_cu
= cu
->per_cu
;
16474 gdb_assert (baton
->per_cu
);
16476 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16478 if (attr_form_is_constant (member_loc
))
16480 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
16481 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16484 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16486 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16489 *ptr
++ = DW_OP_call4
;
16490 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16491 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16494 if (attr_form_is_constant (member_loc
))
16496 *ptr
++ = DW_OP_addr
;
16497 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16498 ptr
+= cu
->header
.addr_size
;
16502 /* We have to copy the data here, because DW_OP_call4 will only
16503 use a DW_AT_location attribute. */
16504 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16505 ptr
+= DW_BLOCK (member_loc
)->size
;
16508 *ptr
++ = DW_OP_plus
;
16509 gdb_assert (ptr
- baton
->data
== baton
->size
);
16511 SYMBOL_LOCATION_BATON (sym
) = baton
;
16512 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16515 /* Create appropriate locally-scoped variables for all the
16516 DW_TAG_common_block entries. Also create a struct common_block
16517 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16518 is used to sepate the common blocks name namespace from regular
16522 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16524 struct attribute
*attr
;
16526 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16529 /* Support the .debug_loc offsets. */
16530 if (attr_form_is_block (attr
))
16534 else if (attr_form_is_section_offset (attr
))
16536 dwarf2_complex_location_expr_complaint ();
16541 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16542 "common block member");
16547 if (die
->child
!= NULL
)
16549 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16550 struct die_info
*child_die
;
16551 size_t n_entries
= 0, size
;
16552 struct common_block
*common_block
;
16553 struct symbol
*sym
;
16555 for (child_die
= die
->child
;
16556 child_die
&& child_die
->tag
;
16557 child_die
= sibling_die (child_die
))
16560 size
= (sizeof (struct common_block
)
16561 + (n_entries
- 1) * sizeof (struct symbol
*));
16563 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16565 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16566 common_block
->n_entries
= 0;
16568 for (child_die
= die
->child
;
16569 child_die
&& child_die
->tag
;
16570 child_die
= sibling_die (child_die
))
16572 /* Create the symbol in the DW_TAG_common_block block in the current
16574 sym
= new_symbol (child_die
, NULL
, cu
);
16577 struct attribute
*member_loc
;
16579 common_block
->contents
[common_block
->n_entries
++] = sym
;
16581 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16585 /* GDB has handled this for a long time, but it is
16586 not specified by DWARF. It seems to have been
16587 emitted by gfortran at least as recently as:
16588 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16589 complaint (&symfile_complaints
,
16590 _("Variable in common block has "
16591 "DW_AT_data_member_location "
16592 "- DIE at %s [in module %s]"),
16593 sect_offset_str (child_die
->sect_off
),
16594 objfile_name (objfile
));
16596 if (attr_form_is_section_offset (member_loc
))
16597 dwarf2_complex_location_expr_complaint ();
16598 else if (attr_form_is_constant (member_loc
)
16599 || attr_form_is_block (member_loc
))
16602 mark_common_block_symbol_computed (sym
, die
, attr
,
16606 dwarf2_complex_location_expr_complaint ();
16611 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16612 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16616 /* Create a type for a C++ namespace. */
16618 static struct type
*
16619 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16621 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16622 const char *previous_prefix
, *name
;
16626 /* For extensions, reuse the type of the original namespace. */
16627 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16629 struct die_info
*ext_die
;
16630 struct dwarf2_cu
*ext_cu
= cu
;
16632 ext_die
= dwarf2_extension (die
, &ext_cu
);
16633 type
= read_type_die (ext_die
, ext_cu
);
16635 /* EXT_CU may not be the same as CU.
16636 Ensure TYPE is recorded with CU in die_type_hash. */
16637 return set_die_type (die
, type
, cu
);
16640 name
= namespace_name (die
, &is_anonymous
, cu
);
16642 /* Now build the name of the current namespace. */
16644 previous_prefix
= determine_prefix (die
, cu
);
16645 if (previous_prefix
[0] != '\0')
16646 name
= typename_concat (&objfile
->objfile_obstack
,
16647 previous_prefix
, name
, 0, cu
);
16649 /* Create the type. */
16650 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16651 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
16653 return set_die_type (die
, type
, cu
);
16656 /* Read a namespace scope. */
16659 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16661 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16664 /* Add a symbol associated to this if we haven't seen the namespace
16665 before. Also, add a using directive if it's an anonymous
16668 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16672 type
= read_type_die (die
, cu
);
16673 new_symbol (die
, type
, cu
);
16675 namespace_name (die
, &is_anonymous
, cu
);
16678 const char *previous_prefix
= determine_prefix (die
, cu
);
16680 std::vector
<const char *> excludes
;
16681 add_using_directive (using_directives (cu
->language
),
16682 previous_prefix
, TYPE_NAME (type
), NULL
,
16683 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16687 if (die
->child
!= NULL
)
16689 struct die_info
*child_die
= die
->child
;
16691 while (child_die
&& child_die
->tag
)
16693 process_die (child_die
, cu
);
16694 child_die
= sibling_die (child_die
);
16699 /* Read a Fortran module as type. This DIE can be only a declaration used for
16700 imported module. Still we need that type as local Fortran "use ... only"
16701 declaration imports depend on the created type in determine_prefix. */
16703 static struct type
*
16704 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16706 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16707 const char *module_name
;
16710 module_name
= dwarf2_name (die
, cu
);
16712 complaint (&symfile_complaints
,
16713 _("DW_TAG_module has no name, offset %s"),
16714 sect_offset_str (die
->sect_off
));
16715 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16717 /* determine_prefix uses TYPE_TAG_NAME. */
16718 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
16720 return set_die_type (die
, type
, cu
);
16723 /* Read a Fortran module. */
16726 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16728 struct die_info
*child_die
= die
->child
;
16731 type
= read_type_die (die
, cu
);
16732 new_symbol (die
, type
, cu
);
16734 while (child_die
&& child_die
->tag
)
16736 process_die (child_die
, cu
);
16737 child_die
= sibling_die (child_die
);
16741 /* Return the name of the namespace represented by DIE. Set
16742 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16745 static const char *
16746 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16748 struct die_info
*current_die
;
16749 const char *name
= NULL
;
16751 /* Loop through the extensions until we find a name. */
16753 for (current_die
= die
;
16754 current_die
!= NULL
;
16755 current_die
= dwarf2_extension (die
, &cu
))
16757 /* We don't use dwarf2_name here so that we can detect the absence
16758 of a name -> anonymous namespace. */
16759 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16765 /* Is it an anonymous namespace? */
16767 *is_anonymous
= (name
== NULL
);
16769 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16774 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16775 the user defined type vector. */
16777 static struct type
*
16778 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16780 struct gdbarch
*gdbarch
16781 = get_objfile_arch (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16782 struct comp_unit_head
*cu_header
= &cu
->header
;
16784 struct attribute
*attr_byte_size
;
16785 struct attribute
*attr_address_class
;
16786 int byte_size
, addr_class
;
16787 struct type
*target_type
;
16789 target_type
= die_type (die
, cu
);
16791 /* The die_type call above may have already set the type for this DIE. */
16792 type
= get_die_type (die
, cu
);
16796 type
= lookup_pointer_type (target_type
);
16798 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16799 if (attr_byte_size
)
16800 byte_size
= DW_UNSND (attr_byte_size
);
16802 byte_size
= cu_header
->addr_size
;
16804 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16805 if (attr_address_class
)
16806 addr_class
= DW_UNSND (attr_address_class
);
16808 addr_class
= DW_ADDR_none
;
16810 /* If the pointer size or address class is different than the
16811 default, create a type variant marked as such and set the
16812 length accordingly. */
16813 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
16815 if (gdbarch_address_class_type_flags_p (gdbarch
))
16819 type_flags
= gdbarch_address_class_type_flags
16820 (gdbarch
, byte_size
, addr_class
);
16821 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16823 type
= make_type_with_address_space (type
, type_flags
);
16825 else if (TYPE_LENGTH (type
) != byte_size
)
16827 complaint (&symfile_complaints
,
16828 _("invalid pointer size %d"), byte_size
);
16832 /* Should we also complain about unhandled address classes? */
16836 TYPE_LENGTH (type
) = byte_size
;
16837 return set_die_type (die
, type
, cu
);
16840 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16841 the user defined type vector. */
16843 static struct type
*
16844 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16847 struct type
*to_type
;
16848 struct type
*domain
;
16850 to_type
= die_type (die
, cu
);
16851 domain
= die_containing_type (die
, cu
);
16853 /* The calls above may have already set the type for this DIE. */
16854 type
= get_die_type (die
, cu
);
16858 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
16859 type
= lookup_methodptr_type (to_type
);
16860 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
16862 struct type
*new_type
16863 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16865 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
16866 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
16867 TYPE_VARARGS (to_type
));
16868 type
= lookup_methodptr_type (new_type
);
16871 type
= lookup_memberptr_type (to_type
, domain
);
16873 return set_die_type (die
, type
, cu
);
16876 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
16877 the user defined type vector. */
16879 static struct type
*
16880 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16881 enum type_code refcode
)
16883 struct comp_unit_head
*cu_header
= &cu
->header
;
16884 struct type
*type
, *target_type
;
16885 struct attribute
*attr
;
16887 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
16889 target_type
= die_type (die
, cu
);
16891 /* The die_type call above may have already set the type for this DIE. */
16892 type
= get_die_type (die
, cu
);
16896 type
= lookup_reference_type (target_type
, refcode
);
16897 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16900 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16904 TYPE_LENGTH (type
) = cu_header
->addr_size
;
16906 return set_die_type (die
, type
, cu
);
16909 /* Add the given cv-qualifiers to the element type of the array. GCC
16910 outputs DWARF type qualifiers that apply to an array, not the
16911 element type. But GDB relies on the array element type to carry
16912 the cv-qualifiers. This mimics section 6.7.3 of the C99
16915 static struct type
*
16916 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16917 struct type
*base_type
, int cnst
, int voltl
)
16919 struct type
*el_type
, *inner_array
;
16921 base_type
= copy_type (base_type
);
16922 inner_array
= base_type
;
16924 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
16926 TYPE_TARGET_TYPE (inner_array
) =
16927 copy_type (TYPE_TARGET_TYPE (inner_array
));
16928 inner_array
= TYPE_TARGET_TYPE (inner_array
);
16931 el_type
= TYPE_TARGET_TYPE (inner_array
);
16932 cnst
|= TYPE_CONST (el_type
);
16933 voltl
|= TYPE_VOLATILE (el_type
);
16934 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
16936 return set_die_type (die
, base_type
, cu
);
16939 static struct type
*
16940 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16942 struct type
*base_type
, *cv_type
;
16944 base_type
= die_type (die
, cu
);
16946 /* The die_type call above may have already set the type for this DIE. */
16947 cv_type
= get_die_type (die
, cu
);
16951 /* In case the const qualifier is applied to an array type, the element type
16952 is so qualified, not the array type (section 6.7.3 of C99). */
16953 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
16954 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
16956 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
16957 return set_die_type (die
, cv_type
, cu
);
16960 static struct type
*
16961 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16963 struct type
*base_type
, *cv_type
;
16965 base_type
= die_type (die
, cu
);
16967 /* The die_type call above may have already set the type for this DIE. */
16968 cv_type
= get_die_type (die
, cu
);
16972 /* In case the volatile qualifier is applied to an array type, the
16973 element type is so qualified, not the array type (section 6.7.3
16975 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
16976 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
16978 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
16979 return set_die_type (die
, cv_type
, cu
);
16982 /* Handle DW_TAG_restrict_type. */
16984 static struct type
*
16985 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16987 struct type
*base_type
, *cv_type
;
16989 base_type
= die_type (die
, cu
);
16991 /* The die_type call above may have already set the type for this DIE. */
16992 cv_type
= get_die_type (die
, cu
);
16996 cv_type
= make_restrict_type (base_type
);
16997 return set_die_type (die
, cv_type
, cu
);
17000 /* Handle DW_TAG_atomic_type. */
17002 static struct type
*
17003 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17005 struct type
*base_type
, *cv_type
;
17007 base_type
= die_type (die
, cu
);
17009 /* The die_type call above may have already set the type for this DIE. */
17010 cv_type
= get_die_type (die
, cu
);
17014 cv_type
= make_atomic_type (base_type
);
17015 return set_die_type (die
, cv_type
, cu
);
17018 /* Extract all information from a DW_TAG_string_type DIE and add to
17019 the user defined type vector. It isn't really a user defined type,
17020 but it behaves like one, with other DIE's using an AT_user_def_type
17021 attribute to reference it. */
17023 static struct type
*
17024 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17026 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17027 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17028 struct type
*type
, *range_type
, *index_type
, *char_type
;
17029 struct attribute
*attr
;
17030 unsigned int length
;
17032 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
17035 length
= DW_UNSND (attr
);
17039 /* Check for the DW_AT_byte_size attribute. */
17040 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17043 length
= DW_UNSND (attr
);
17051 index_type
= objfile_type (objfile
)->builtin_int
;
17052 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17053 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
17054 type
= create_string_type (NULL
, char_type
, range_type
);
17056 return set_die_type (die
, type
, cu
);
17059 /* Assuming that DIE corresponds to a function, returns nonzero
17060 if the function is prototyped. */
17063 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
17065 struct attribute
*attr
;
17067 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
17068 if (attr
&& (DW_UNSND (attr
) != 0))
17071 /* The DWARF standard implies that the DW_AT_prototyped attribute
17072 is only meaninful for C, but the concept also extends to other
17073 languages that allow unprototyped functions (Eg: Objective C).
17074 For all other languages, assume that functions are always
17076 if (cu
->language
!= language_c
17077 && cu
->language
!= language_objc
17078 && cu
->language
!= language_opencl
)
17081 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17082 prototyped and unprototyped functions; default to prototyped,
17083 since that is more common in modern code (and RealView warns
17084 about unprototyped functions). */
17085 if (producer_is_realview (cu
->producer
))
17091 /* Handle DIES due to C code like:
17095 int (*funcp)(int a, long l);
17099 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17101 static struct type
*
17102 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17104 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17105 struct type
*type
; /* Type that this function returns. */
17106 struct type
*ftype
; /* Function that returns above type. */
17107 struct attribute
*attr
;
17109 type
= die_type (die
, cu
);
17111 /* The die_type call above may have already set the type for this DIE. */
17112 ftype
= get_die_type (die
, cu
);
17116 ftype
= lookup_function_type (type
);
17118 if (prototyped_function_p (die
, cu
))
17119 TYPE_PROTOTYPED (ftype
) = 1;
17121 /* Store the calling convention in the type if it's available in
17122 the subroutine die. Otherwise set the calling convention to
17123 the default value DW_CC_normal. */
17124 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17126 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
17127 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17128 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17130 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17132 /* Record whether the function returns normally to its caller or not
17133 if the DWARF producer set that information. */
17134 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17135 if (attr
&& (DW_UNSND (attr
) != 0))
17136 TYPE_NO_RETURN (ftype
) = 1;
17138 /* We need to add the subroutine type to the die immediately so
17139 we don't infinitely recurse when dealing with parameters
17140 declared as the same subroutine type. */
17141 set_die_type (die
, ftype
, cu
);
17143 if (die
->child
!= NULL
)
17145 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17146 struct die_info
*child_die
;
17147 int nparams
, iparams
;
17149 /* Count the number of parameters.
17150 FIXME: GDB currently ignores vararg functions, but knows about
17151 vararg member functions. */
17153 child_die
= die
->child
;
17154 while (child_die
&& child_die
->tag
)
17156 if (child_die
->tag
== DW_TAG_formal_parameter
)
17158 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17159 TYPE_VARARGS (ftype
) = 1;
17160 child_die
= sibling_die (child_die
);
17163 /* Allocate storage for parameters and fill them in. */
17164 TYPE_NFIELDS (ftype
) = nparams
;
17165 TYPE_FIELDS (ftype
) = (struct field
*)
17166 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
17168 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17169 even if we error out during the parameters reading below. */
17170 for (iparams
= 0; iparams
< nparams
; iparams
++)
17171 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17174 child_die
= die
->child
;
17175 while (child_die
&& child_die
->tag
)
17177 if (child_die
->tag
== DW_TAG_formal_parameter
)
17179 struct type
*arg_type
;
17181 /* DWARF version 2 has no clean way to discern C++
17182 static and non-static member functions. G++ helps
17183 GDB by marking the first parameter for non-static
17184 member functions (which is the this pointer) as
17185 artificial. We pass this information to
17186 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17188 DWARF version 3 added DW_AT_object_pointer, which GCC
17189 4.5 does not yet generate. */
17190 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17192 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17194 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17195 arg_type
= die_type (child_die
, cu
);
17197 /* RealView does not mark THIS as const, which the testsuite
17198 expects. GCC marks THIS as const in method definitions,
17199 but not in the class specifications (GCC PR 43053). */
17200 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17201 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17204 struct dwarf2_cu
*arg_cu
= cu
;
17205 const char *name
= dwarf2_name (child_die
, cu
);
17207 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17210 /* If the compiler emits this, use it. */
17211 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17214 else if (name
&& strcmp (name
, "this") == 0)
17215 /* Function definitions will have the argument names. */
17217 else if (name
== NULL
&& iparams
== 0)
17218 /* Declarations may not have the names, so like
17219 elsewhere in GDB, assume an artificial first
17220 argument is "this". */
17224 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17228 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17231 child_die
= sibling_die (child_die
);
17238 static struct type
*
17239 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17241 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17242 const char *name
= NULL
;
17243 struct type
*this_type
, *target_type
;
17245 name
= dwarf2_full_name (NULL
, die
, cu
);
17246 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17247 TYPE_TARGET_STUB (this_type
) = 1;
17248 set_die_type (die
, this_type
, cu
);
17249 target_type
= die_type (die
, cu
);
17250 if (target_type
!= this_type
)
17251 TYPE_TARGET_TYPE (this_type
) = target_type
;
17254 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17255 spec and cause infinite loops in GDB. */
17256 complaint (&symfile_complaints
,
17257 _("Self-referential DW_TAG_typedef "
17258 "- DIE at %s [in module %s]"),
17259 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17260 TYPE_TARGET_TYPE (this_type
) = NULL
;
17265 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17266 (which may be different from NAME) to the architecture back-end to allow
17267 it to guess the correct format if necessary. */
17269 static struct type
*
17270 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17271 const char *name_hint
)
17273 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17274 const struct floatformat
**format
;
17277 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17279 type
= init_float_type (objfile
, bits
, name
, format
);
17281 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17286 /* Find a representation of a given base type and install
17287 it in the TYPE field of the die. */
17289 static struct type
*
17290 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17292 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17294 struct attribute
*attr
;
17295 int encoding
= 0, bits
= 0;
17298 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17301 encoding
= DW_UNSND (attr
);
17303 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17306 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17308 name
= dwarf2_name (die
, cu
);
17311 complaint (&symfile_complaints
,
17312 _("DW_AT_name missing from DW_TAG_base_type"));
17317 case DW_ATE_address
:
17318 /* Turn DW_ATE_address into a void * pointer. */
17319 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17320 type
= init_pointer_type (objfile
, bits
, name
, type
);
17322 case DW_ATE_boolean
:
17323 type
= init_boolean_type (objfile
, bits
, 1, name
);
17325 case DW_ATE_complex_float
:
17326 type
= dwarf2_init_float_type (objfile
, bits
/ 2, NULL
, name
);
17327 type
= init_complex_type (objfile
, name
, type
);
17329 case DW_ATE_decimal_float
:
17330 type
= init_decfloat_type (objfile
, bits
, name
);
17333 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
17335 case DW_ATE_signed
:
17336 type
= init_integer_type (objfile
, bits
, 0, name
);
17338 case DW_ATE_unsigned
:
17339 if (cu
->language
== language_fortran
17341 && startswith (name
, "character("))
17342 type
= init_character_type (objfile
, bits
, 1, name
);
17344 type
= init_integer_type (objfile
, bits
, 1, name
);
17346 case DW_ATE_signed_char
:
17347 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17348 || cu
->language
== language_pascal
17349 || cu
->language
== language_fortran
)
17350 type
= init_character_type (objfile
, bits
, 0, name
);
17352 type
= init_integer_type (objfile
, bits
, 0, name
);
17354 case DW_ATE_unsigned_char
:
17355 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17356 || cu
->language
== language_pascal
17357 || cu
->language
== language_fortran
17358 || cu
->language
== language_rust
)
17359 type
= init_character_type (objfile
, bits
, 1, name
);
17361 type
= init_integer_type (objfile
, bits
, 1, name
);
17365 gdbarch
*arch
= get_objfile_arch (objfile
);
17368 type
= builtin_type (arch
)->builtin_char16
;
17369 else if (bits
== 32)
17370 type
= builtin_type (arch
)->builtin_char32
;
17373 complaint (&symfile_complaints
,
17374 _("unsupported DW_ATE_UTF bit size: '%d'"),
17376 type
= init_integer_type (objfile
, bits
, 1, name
);
17378 return set_die_type (die
, type
, cu
);
17383 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
17384 dwarf_type_encoding_name (encoding
));
17385 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17389 if (name
&& strcmp (name
, "char") == 0)
17390 TYPE_NOSIGN (type
) = 1;
17392 return set_die_type (die
, type
, cu
);
17395 /* Parse dwarf attribute if it's a block, reference or constant and put the
17396 resulting value of the attribute into struct bound_prop.
17397 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17400 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17401 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
17403 struct dwarf2_property_baton
*baton
;
17404 struct obstack
*obstack
17405 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17407 if (attr
== NULL
|| prop
== NULL
)
17410 if (attr_form_is_block (attr
))
17412 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17413 baton
->referenced_type
= NULL
;
17414 baton
->locexpr
.per_cu
= cu
->per_cu
;
17415 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17416 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17417 prop
->data
.baton
= baton
;
17418 prop
->kind
= PROP_LOCEXPR
;
17419 gdb_assert (prop
->data
.baton
!= NULL
);
17421 else if (attr_form_is_ref (attr
))
17423 struct dwarf2_cu
*target_cu
= cu
;
17424 struct die_info
*target_die
;
17425 struct attribute
*target_attr
;
17427 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17428 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17429 if (target_attr
== NULL
)
17430 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17432 if (target_attr
== NULL
)
17435 switch (target_attr
->name
)
17437 case DW_AT_location
:
17438 if (attr_form_is_section_offset (target_attr
))
17440 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17441 baton
->referenced_type
= die_type (target_die
, target_cu
);
17442 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17443 prop
->data
.baton
= baton
;
17444 prop
->kind
= PROP_LOCLIST
;
17445 gdb_assert (prop
->data
.baton
!= NULL
);
17447 else if (attr_form_is_block (target_attr
))
17449 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17450 baton
->referenced_type
= die_type (target_die
, target_cu
);
17451 baton
->locexpr
.per_cu
= cu
->per_cu
;
17452 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17453 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17454 prop
->data
.baton
= baton
;
17455 prop
->kind
= PROP_LOCEXPR
;
17456 gdb_assert (prop
->data
.baton
!= NULL
);
17460 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17461 "dynamic property");
17465 case DW_AT_data_member_location
:
17469 if (!handle_data_member_location (target_die
, target_cu
,
17473 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17474 baton
->referenced_type
= read_type_die (target_die
->parent
,
17476 baton
->offset_info
.offset
= offset
;
17477 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17478 prop
->data
.baton
= baton
;
17479 prop
->kind
= PROP_ADDR_OFFSET
;
17484 else if (attr_form_is_constant (attr
))
17486 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
17487 prop
->kind
= PROP_CONST
;
17491 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17492 dwarf2_name (die
, cu
));
17499 /* Read the given DW_AT_subrange DIE. */
17501 static struct type
*
17502 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17504 struct type
*base_type
, *orig_base_type
;
17505 struct type
*range_type
;
17506 struct attribute
*attr
;
17507 struct dynamic_prop low
, high
;
17508 int low_default_is_valid
;
17509 int high_bound_is_count
= 0;
17511 LONGEST negative_mask
;
17513 orig_base_type
= die_type (die
, cu
);
17514 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17515 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17516 creating the range type, but we use the result of check_typedef
17517 when examining properties of the type. */
17518 base_type
= check_typedef (orig_base_type
);
17520 /* The die_type call above may have already set the type for this DIE. */
17521 range_type
= get_die_type (die
, cu
);
17525 low
.kind
= PROP_CONST
;
17526 high
.kind
= PROP_CONST
;
17527 high
.data
.const_val
= 0;
17529 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17530 omitting DW_AT_lower_bound. */
17531 switch (cu
->language
)
17534 case language_cplus
:
17535 low
.data
.const_val
= 0;
17536 low_default_is_valid
= 1;
17538 case language_fortran
:
17539 low
.data
.const_val
= 1;
17540 low_default_is_valid
= 1;
17543 case language_objc
:
17544 case language_rust
:
17545 low
.data
.const_val
= 0;
17546 low_default_is_valid
= (cu
->header
.version
>= 4);
17550 case language_pascal
:
17551 low
.data
.const_val
= 1;
17552 low_default_is_valid
= (cu
->header
.version
>= 4);
17555 low
.data
.const_val
= 0;
17556 low_default_is_valid
= 0;
17560 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17562 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
17563 else if (!low_default_is_valid
)
17564 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
17565 "- DIE at %s [in module %s]"),
17566 sect_offset_str (die
->sect_off
),
17567 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17569 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17570 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17572 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
17573 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17575 /* If bounds are constant do the final calculation here. */
17576 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17577 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17579 high_bound_is_count
= 1;
17583 /* Dwarf-2 specifications explicitly allows to create subrange types
17584 without specifying a base type.
17585 In that case, the base type must be set to the type of
17586 the lower bound, upper bound or count, in that order, if any of these
17587 three attributes references an object that has a type.
17588 If no base type is found, the Dwarf-2 specifications say that
17589 a signed integer type of size equal to the size of an address should
17591 For the following C code: `extern char gdb_int [];'
17592 GCC produces an empty range DIE.
17593 FIXME: muller/2010-05-28: Possible references to object for low bound,
17594 high bound or count are not yet handled by this code. */
17595 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
17597 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17598 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17599 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
17600 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
17602 /* Test "int", "long int", and "long long int" objfile types,
17603 and select the first one having a size above or equal to the
17604 architecture address size. */
17605 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17606 base_type
= int_type
;
17609 int_type
= objfile_type (objfile
)->builtin_long
;
17610 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17611 base_type
= int_type
;
17614 int_type
= objfile_type (objfile
)->builtin_long_long
;
17615 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17616 base_type
= int_type
;
17621 /* Normally, the DWARF producers are expected to use a signed
17622 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17623 But this is unfortunately not always the case, as witnessed
17624 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17625 is used instead. To work around that ambiguity, we treat
17626 the bounds as signed, and thus sign-extend their values, when
17627 the base type is signed. */
17629 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17630 if (low
.kind
== PROP_CONST
17631 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17632 low
.data
.const_val
|= negative_mask
;
17633 if (high
.kind
== PROP_CONST
17634 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17635 high
.data
.const_val
|= negative_mask
;
17637 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
17639 if (high_bound_is_count
)
17640 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17642 /* Ada expects an empty array on no boundary attributes. */
17643 if (attr
== NULL
&& cu
->language
!= language_ada
)
17644 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17646 name
= dwarf2_name (die
, cu
);
17648 TYPE_NAME (range_type
) = name
;
17650 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17652 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17654 set_die_type (die
, range_type
, cu
);
17656 /* set_die_type should be already done. */
17657 set_descriptive_type (range_type
, die
, cu
);
17662 static struct type
*
17663 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17667 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
17669 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
17671 /* In Ada, an unspecified type is typically used when the description
17672 of the type is defered to a different unit. When encountering
17673 such a type, we treat it as a stub, and try to resolve it later on,
17675 if (cu
->language
== language_ada
)
17676 TYPE_STUB (type
) = 1;
17678 return set_die_type (die
, type
, cu
);
17681 /* Read a single die and all its descendents. Set the die's sibling
17682 field to NULL; set other fields in the die correctly, and set all
17683 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17684 location of the info_ptr after reading all of those dies. PARENT
17685 is the parent of the die in question. */
17687 static struct die_info
*
17688 read_die_and_children (const struct die_reader_specs
*reader
,
17689 const gdb_byte
*info_ptr
,
17690 const gdb_byte
**new_info_ptr
,
17691 struct die_info
*parent
)
17693 struct die_info
*die
;
17694 const gdb_byte
*cur_ptr
;
17697 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
17700 *new_info_ptr
= cur_ptr
;
17703 store_in_ref_table (die
, reader
->cu
);
17706 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17710 *new_info_ptr
= cur_ptr
;
17713 die
->sibling
= NULL
;
17714 die
->parent
= parent
;
17718 /* Read a die, all of its descendents, and all of its siblings; set
17719 all of the fields of all of the dies correctly. Arguments are as
17720 in read_die_and_children. */
17722 static struct die_info
*
17723 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17724 const gdb_byte
*info_ptr
,
17725 const gdb_byte
**new_info_ptr
,
17726 struct die_info
*parent
)
17728 struct die_info
*first_die
, *last_sibling
;
17729 const gdb_byte
*cur_ptr
;
17731 cur_ptr
= info_ptr
;
17732 first_die
= last_sibling
= NULL
;
17736 struct die_info
*die
17737 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17741 *new_info_ptr
= cur_ptr
;
17748 last_sibling
->sibling
= die
;
17750 last_sibling
= die
;
17754 /* Read a die, all of its descendents, and all of its siblings; set
17755 all of the fields of all of the dies correctly. Arguments are as
17756 in read_die_and_children.
17757 This the main entry point for reading a DIE and all its children. */
17759 static struct die_info
*
17760 read_die_and_siblings (const struct die_reader_specs
*reader
,
17761 const gdb_byte
*info_ptr
,
17762 const gdb_byte
**new_info_ptr
,
17763 struct die_info
*parent
)
17765 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17766 new_info_ptr
, parent
);
17768 if (dwarf_die_debug
)
17770 fprintf_unfiltered (gdb_stdlog
,
17771 "Read die from %s@0x%x of %s:\n",
17772 get_section_name (reader
->die_section
),
17773 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17774 bfd_get_filename (reader
->abfd
));
17775 dump_die (die
, dwarf_die_debug
);
17781 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
17783 The caller is responsible for filling in the extra attributes
17784 and updating (*DIEP)->num_attrs.
17785 Set DIEP to point to a newly allocated die with its information,
17786 except for its child, sibling, and parent fields.
17787 Set HAS_CHILDREN to tell whether the die has children or not. */
17789 static const gdb_byte
*
17790 read_full_die_1 (const struct die_reader_specs
*reader
,
17791 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17792 int *has_children
, int num_extra_attrs
)
17794 unsigned int abbrev_number
, bytes_read
, i
;
17795 struct abbrev_info
*abbrev
;
17796 struct die_info
*die
;
17797 struct dwarf2_cu
*cu
= reader
->cu
;
17798 bfd
*abfd
= reader
->abfd
;
17800 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
17801 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17802 info_ptr
+= bytes_read
;
17803 if (!abbrev_number
)
17810 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
17812 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
17814 bfd_get_filename (abfd
));
17816 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
17817 die
->sect_off
= sect_off
;
17818 die
->tag
= abbrev
->tag
;
17819 die
->abbrev
= abbrev_number
;
17821 /* Make the result usable.
17822 The caller needs to update num_attrs after adding the extra
17824 die
->num_attrs
= abbrev
->num_attrs
;
17826 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
17827 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
17831 *has_children
= abbrev
->has_children
;
17835 /* Read a die and all its attributes.
17836 Set DIEP to point to a newly allocated die with its information,
17837 except for its child, sibling, and parent fields.
17838 Set HAS_CHILDREN to tell whether the die has children or not. */
17840 static const gdb_byte
*
17841 read_full_die (const struct die_reader_specs
*reader
,
17842 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17845 const gdb_byte
*result
;
17847 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
17849 if (dwarf_die_debug
)
17851 fprintf_unfiltered (gdb_stdlog
,
17852 "Read die from %s@0x%x of %s:\n",
17853 get_section_name (reader
->die_section
),
17854 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17855 bfd_get_filename (reader
->abfd
));
17856 dump_die (*diep
, dwarf_die_debug
);
17862 /* Abbreviation tables.
17864 In DWARF version 2, the description of the debugging information is
17865 stored in a separate .debug_abbrev section. Before we read any
17866 dies from a section we read in all abbreviations and install them
17867 in a hash table. */
17869 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
17871 struct abbrev_info
*
17872 abbrev_table::alloc_abbrev ()
17874 struct abbrev_info
*abbrev
;
17876 abbrev
= XOBNEW (&abbrev_obstack
, struct abbrev_info
);
17877 memset (abbrev
, 0, sizeof (struct abbrev_info
));
17882 /* Add an abbreviation to the table. */
17885 abbrev_table::add_abbrev (unsigned int abbrev_number
,
17886 struct abbrev_info
*abbrev
)
17888 unsigned int hash_number
;
17890 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
17891 abbrev
->next
= m_abbrevs
[hash_number
];
17892 m_abbrevs
[hash_number
] = abbrev
;
17895 /* Look up an abbrev in the table.
17896 Returns NULL if the abbrev is not found. */
17898 struct abbrev_info
*
17899 abbrev_table::lookup_abbrev (unsigned int abbrev_number
)
17901 unsigned int hash_number
;
17902 struct abbrev_info
*abbrev
;
17904 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
17905 abbrev
= m_abbrevs
[hash_number
];
17909 if (abbrev
->number
== abbrev_number
)
17911 abbrev
= abbrev
->next
;
17916 /* Read in an abbrev table. */
17918 static abbrev_table_up
17919 abbrev_table_read_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
17920 struct dwarf2_section_info
*section
,
17921 sect_offset sect_off
)
17923 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17924 bfd
*abfd
= get_section_bfd_owner (section
);
17925 const gdb_byte
*abbrev_ptr
;
17926 struct abbrev_info
*cur_abbrev
;
17927 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
17928 unsigned int abbrev_form
;
17929 struct attr_abbrev
*cur_attrs
;
17930 unsigned int allocated_attrs
;
17932 abbrev_table_up
abbrev_table (new struct abbrev_table (sect_off
));
17934 dwarf2_read_section (objfile
, section
);
17935 abbrev_ptr
= section
->buffer
+ to_underlying (sect_off
);
17936 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
17937 abbrev_ptr
+= bytes_read
;
17939 allocated_attrs
= ATTR_ALLOC_CHUNK
;
17940 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
17942 /* Loop until we reach an abbrev number of 0. */
17943 while (abbrev_number
)
17945 cur_abbrev
= abbrev_table
->alloc_abbrev ();
17947 /* read in abbrev header */
17948 cur_abbrev
->number
= abbrev_number
;
17950 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
17951 abbrev_ptr
+= bytes_read
;
17952 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
17955 /* now read in declarations */
17958 LONGEST implicit_const
;
17960 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
17961 abbrev_ptr
+= bytes_read
;
17962 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
17963 abbrev_ptr
+= bytes_read
;
17964 if (abbrev_form
== DW_FORM_implicit_const
)
17966 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
17968 abbrev_ptr
+= bytes_read
;
17972 /* Initialize it due to a false compiler warning. */
17973 implicit_const
= -1;
17976 if (abbrev_name
== 0)
17979 if (cur_abbrev
->num_attrs
== allocated_attrs
)
17981 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
17983 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
17986 cur_attrs
[cur_abbrev
->num_attrs
].name
17987 = (enum dwarf_attribute
) abbrev_name
;
17988 cur_attrs
[cur_abbrev
->num_attrs
].form
17989 = (enum dwarf_form
) abbrev_form
;
17990 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
17991 ++cur_abbrev
->num_attrs
;
17994 cur_abbrev
->attrs
=
17995 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
17996 cur_abbrev
->num_attrs
);
17997 memcpy (cur_abbrev
->attrs
, cur_attrs
,
17998 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
18000 abbrev_table
->add_abbrev (abbrev_number
, cur_abbrev
);
18002 /* Get next abbreviation.
18003 Under Irix6 the abbreviations for a compilation unit are not
18004 always properly terminated with an abbrev number of 0.
18005 Exit loop if we encounter an abbreviation which we have
18006 already read (which means we are about to read the abbreviations
18007 for the next compile unit) or if the end of the abbreviation
18008 table is reached. */
18009 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
18011 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18012 abbrev_ptr
+= bytes_read
;
18013 if (abbrev_table
->lookup_abbrev (abbrev_number
) != NULL
)
18018 return abbrev_table
;
18021 /* Returns nonzero if TAG represents a type that we might generate a partial
18025 is_type_tag_for_partial (int tag
)
18030 /* Some types that would be reasonable to generate partial symbols for,
18031 that we don't at present. */
18032 case DW_TAG_array_type
:
18033 case DW_TAG_file_type
:
18034 case DW_TAG_ptr_to_member_type
:
18035 case DW_TAG_set_type
:
18036 case DW_TAG_string_type
:
18037 case DW_TAG_subroutine_type
:
18039 case DW_TAG_base_type
:
18040 case DW_TAG_class_type
:
18041 case DW_TAG_interface_type
:
18042 case DW_TAG_enumeration_type
:
18043 case DW_TAG_structure_type
:
18044 case DW_TAG_subrange_type
:
18045 case DW_TAG_typedef
:
18046 case DW_TAG_union_type
:
18053 /* Load all DIEs that are interesting for partial symbols into memory. */
18055 static struct partial_die_info
*
18056 load_partial_dies (const struct die_reader_specs
*reader
,
18057 const gdb_byte
*info_ptr
, int building_psymtab
)
18059 struct dwarf2_cu
*cu
= reader
->cu
;
18060 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18061 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18062 unsigned int bytes_read
;
18063 unsigned int load_all
= 0;
18064 int nesting_level
= 1;
18069 gdb_assert (cu
->per_cu
!= NULL
);
18070 if (cu
->per_cu
->load_all_dies
)
18074 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18078 &cu
->comp_unit_obstack
,
18079 hashtab_obstack_allocate
,
18080 dummy_obstack_deallocate
);
18084 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18086 /* A NULL abbrev means the end of a series of children. */
18087 if (abbrev
== NULL
)
18089 if (--nesting_level
== 0)
18092 info_ptr
+= bytes_read
;
18093 last_die
= parent_die
;
18094 parent_die
= parent_die
->die_parent
;
18098 /* Check for template arguments. We never save these; if
18099 they're seen, we just mark the parent, and go on our way. */
18100 if (parent_die
!= NULL
18101 && cu
->language
== language_cplus
18102 && (abbrev
->tag
== DW_TAG_template_type_param
18103 || abbrev
->tag
== DW_TAG_template_value_param
))
18105 parent_die
->has_template_arguments
= 1;
18109 /* We don't need a partial DIE for the template argument. */
18110 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18115 /* We only recurse into c++ subprograms looking for template arguments.
18116 Skip their other children. */
18118 && cu
->language
== language_cplus
18119 && parent_die
!= NULL
18120 && parent_die
->tag
== DW_TAG_subprogram
)
18122 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18126 /* Check whether this DIE is interesting enough to save. Normally
18127 we would not be interested in members here, but there may be
18128 later variables referencing them via DW_AT_specification (for
18129 static members). */
18131 && !is_type_tag_for_partial (abbrev
->tag
)
18132 && abbrev
->tag
!= DW_TAG_constant
18133 && abbrev
->tag
!= DW_TAG_enumerator
18134 && abbrev
->tag
!= DW_TAG_subprogram
18135 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18136 && abbrev
->tag
!= DW_TAG_lexical_block
18137 && abbrev
->tag
!= DW_TAG_variable
18138 && abbrev
->tag
!= DW_TAG_namespace
18139 && abbrev
->tag
!= DW_TAG_module
18140 && abbrev
->tag
!= DW_TAG_member
18141 && abbrev
->tag
!= DW_TAG_imported_unit
18142 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18144 /* Otherwise we skip to the next sibling, if any. */
18145 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18149 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18152 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18154 /* This two-pass algorithm for processing partial symbols has a
18155 high cost in cache pressure. Thus, handle some simple cases
18156 here which cover the majority of C partial symbols. DIEs
18157 which neither have specification tags in them, nor could have
18158 specification tags elsewhere pointing at them, can simply be
18159 processed and discarded.
18161 This segment is also optional; scan_partial_symbols and
18162 add_partial_symbol will handle these DIEs if we chain
18163 them in normally. When compilers which do not emit large
18164 quantities of duplicate debug information are more common,
18165 this code can probably be removed. */
18167 /* Any complete simple types at the top level (pretty much all
18168 of them, for a language without namespaces), can be processed
18170 if (parent_die
== NULL
18171 && pdi
.has_specification
== 0
18172 && pdi
.is_declaration
== 0
18173 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18174 || pdi
.tag
== DW_TAG_base_type
18175 || pdi
.tag
== DW_TAG_subrange_type
))
18177 if (building_psymtab
&& pdi
.name
!= NULL
)
18178 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18179 VAR_DOMAIN
, LOC_TYPEDEF
,
18180 &objfile
->static_psymbols
,
18181 0, cu
->language
, objfile
);
18182 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18186 /* The exception for DW_TAG_typedef with has_children above is
18187 a workaround of GCC PR debug/47510. In the case of this complaint
18188 type_name_no_tag_or_error will error on such types later.
18190 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18191 it could not find the child DIEs referenced later, this is checked
18192 above. In correct DWARF DW_TAG_typedef should have no children. */
18194 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18195 complaint (&symfile_complaints
,
18196 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18197 "- DIE at %s [in module %s]"),
18198 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18200 /* If we're at the second level, and we're an enumerator, and
18201 our parent has no specification (meaning possibly lives in a
18202 namespace elsewhere), then we can add the partial symbol now
18203 instead of queueing it. */
18204 if (pdi
.tag
== DW_TAG_enumerator
18205 && parent_die
!= NULL
18206 && parent_die
->die_parent
== NULL
18207 && parent_die
->tag
== DW_TAG_enumeration_type
18208 && parent_die
->has_specification
== 0)
18210 if (pdi
.name
== NULL
)
18211 complaint (&symfile_complaints
,
18212 _("malformed enumerator DIE ignored"));
18213 else if (building_psymtab
)
18214 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18215 VAR_DOMAIN
, LOC_CONST
,
18216 cu
->language
== language_cplus
18217 ? &objfile
->global_psymbols
18218 : &objfile
->static_psymbols
,
18219 0, cu
->language
, objfile
);
18221 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18225 struct partial_die_info
*part_die
18226 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18228 /* We'll save this DIE so link it in. */
18229 part_die
->die_parent
= parent_die
;
18230 part_die
->die_sibling
= NULL
;
18231 part_die
->die_child
= NULL
;
18233 if (last_die
&& last_die
== parent_die
)
18234 last_die
->die_child
= part_die
;
18236 last_die
->die_sibling
= part_die
;
18238 last_die
= part_die
;
18240 if (first_die
== NULL
)
18241 first_die
= part_die
;
18243 /* Maybe add the DIE to the hash table. Not all DIEs that we
18244 find interesting need to be in the hash table, because we
18245 also have the parent/sibling/child chains; only those that we
18246 might refer to by offset later during partial symbol reading.
18248 For now this means things that might have be the target of a
18249 DW_AT_specification, DW_AT_abstract_origin, or
18250 DW_AT_extension. DW_AT_extension will refer only to
18251 namespaces; DW_AT_abstract_origin refers to functions (and
18252 many things under the function DIE, but we do not recurse
18253 into function DIEs during partial symbol reading) and
18254 possibly variables as well; DW_AT_specification refers to
18255 declarations. Declarations ought to have the DW_AT_declaration
18256 flag. It happens that GCC forgets to put it in sometimes, but
18257 only for functions, not for types.
18259 Adding more things than necessary to the hash table is harmless
18260 except for the performance cost. Adding too few will result in
18261 wasted time in find_partial_die, when we reread the compilation
18262 unit with load_all_dies set. */
18265 || abbrev
->tag
== DW_TAG_constant
18266 || abbrev
->tag
== DW_TAG_subprogram
18267 || abbrev
->tag
== DW_TAG_variable
18268 || abbrev
->tag
== DW_TAG_namespace
18269 || part_die
->is_declaration
)
18273 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18274 to_underlying (part_die
->sect_off
),
18279 /* For some DIEs we want to follow their children (if any). For C
18280 we have no reason to follow the children of structures; for other
18281 languages we have to, so that we can get at method physnames
18282 to infer fully qualified class names, for DW_AT_specification,
18283 and for C++ template arguments. For C++, we also look one level
18284 inside functions to find template arguments (if the name of the
18285 function does not already contain the template arguments).
18287 For Ada, we need to scan the children of subprograms and lexical
18288 blocks as well because Ada allows the definition of nested
18289 entities that could be interesting for the debugger, such as
18290 nested subprograms for instance. */
18291 if (last_die
->has_children
18293 || last_die
->tag
== DW_TAG_namespace
18294 || last_die
->tag
== DW_TAG_module
18295 || last_die
->tag
== DW_TAG_enumeration_type
18296 || (cu
->language
== language_cplus
18297 && last_die
->tag
== DW_TAG_subprogram
18298 && (last_die
->name
== NULL
18299 || strchr (last_die
->name
, '<') == NULL
))
18300 || (cu
->language
!= language_c
18301 && (last_die
->tag
== DW_TAG_class_type
18302 || last_die
->tag
== DW_TAG_interface_type
18303 || last_die
->tag
== DW_TAG_structure_type
18304 || last_die
->tag
== DW_TAG_union_type
))
18305 || (cu
->language
== language_ada
18306 && (last_die
->tag
== DW_TAG_subprogram
18307 || last_die
->tag
== DW_TAG_lexical_block
))))
18310 parent_die
= last_die
;
18314 /* Otherwise we skip to the next sibling, if any. */
18315 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18317 /* Back to the top, do it again. */
18321 partial_die_info::partial_die_info (sect_offset sect_off_
,
18322 struct abbrev_info
*abbrev
)
18323 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18327 /* Read a minimal amount of information into the minimal die structure.
18328 INFO_PTR should point just after the initial uleb128 of a DIE. */
18331 partial_die_info::read (const struct die_reader_specs
*reader
,
18332 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18334 struct dwarf2_cu
*cu
= reader
->cu
;
18335 struct dwarf2_per_objfile
*dwarf2_per_objfile
18336 = cu
->per_cu
->dwarf2_per_objfile
;
18338 int has_low_pc_attr
= 0;
18339 int has_high_pc_attr
= 0;
18340 int high_pc_relative
= 0;
18342 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18344 struct attribute attr
;
18346 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
], info_ptr
);
18348 /* Store the data if it is of an attribute we want to keep in a
18349 partial symbol table. */
18355 case DW_TAG_compile_unit
:
18356 case DW_TAG_partial_unit
:
18357 case DW_TAG_type_unit
:
18358 /* Compilation units have a DW_AT_name that is a filename, not
18359 a source language identifier. */
18360 case DW_TAG_enumeration_type
:
18361 case DW_TAG_enumerator
:
18362 /* These tags always have simple identifiers already; no need
18363 to canonicalize them. */
18364 name
= DW_STRING (&attr
);
18368 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18371 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
18372 &objfile
->per_bfd
->storage_obstack
);
18377 case DW_AT_linkage_name
:
18378 case DW_AT_MIPS_linkage_name
:
18379 /* Note that both forms of linkage name might appear. We
18380 assume they will be the same, and we only store the last
18382 if (cu
->language
== language_ada
)
18383 name
= DW_STRING (&attr
);
18384 linkage_name
= DW_STRING (&attr
);
18387 has_low_pc_attr
= 1;
18388 lowpc
= attr_value_as_address (&attr
);
18390 case DW_AT_high_pc
:
18391 has_high_pc_attr
= 1;
18392 highpc
= attr_value_as_address (&attr
);
18393 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
18394 high_pc_relative
= 1;
18396 case DW_AT_location
:
18397 /* Support the .debug_loc offsets. */
18398 if (attr_form_is_block (&attr
))
18400 d
.locdesc
= DW_BLOCK (&attr
);
18402 else if (attr_form_is_section_offset (&attr
))
18404 dwarf2_complex_location_expr_complaint ();
18408 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18409 "partial symbol information");
18412 case DW_AT_external
:
18413 is_external
= DW_UNSND (&attr
);
18415 case DW_AT_declaration
:
18416 is_declaration
= DW_UNSND (&attr
);
18421 case DW_AT_abstract_origin
:
18422 case DW_AT_specification
:
18423 case DW_AT_extension
:
18424 has_specification
= 1;
18425 spec_offset
= dwarf2_get_ref_die_offset (&attr
);
18426 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18427 || cu
->per_cu
->is_dwz
);
18429 case DW_AT_sibling
:
18430 /* Ignore absolute siblings, they might point outside of
18431 the current compile unit. */
18432 if (attr
.form
== DW_FORM_ref_addr
)
18433 complaint (&symfile_complaints
,
18434 _("ignoring absolute DW_AT_sibling"));
18437 const gdb_byte
*buffer
= reader
->buffer
;
18438 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
18439 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18441 if (sibling_ptr
< info_ptr
)
18442 complaint (&symfile_complaints
,
18443 _("DW_AT_sibling points backwards"));
18444 else if (sibling_ptr
> reader
->buffer_end
)
18445 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
18447 sibling
= sibling_ptr
;
18450 case DW_AT_byte_size
:
18453 case DW_AT_const_value
:
18454 has_const_value
= 1;
18456 case DW_AT_calling_convention
:
18457 /* DWARF doesn't provide a way to identify a program's source-level
18458 entry point. DW_AT_calling_convention attributes are only meant
18459 to describe functions' calling conventions.
18461 However, because it's a necessary piece of information in
18462 Fortran, and before DWARF 4 DW_CC_program was the only
18463 piece of debugging information whose definition refers to
18464 a 'main program' at all, several compilers marked Fortran
18465 main programs with DW_CC_program --- even when those
18466 functions use the standard calling conventions.
18468 Although DWARF now specifies a way to provide this
18469 information, we support this practice for backward
18471 if (DW_UNSND (&attr
) == DW_CC_program
18472 && cu
->language
== language_fortran
)
18473 main_subprogram
= 1;
18476 if (DW_UNSND (&attr
) == DW_INL_inlined
18477 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18478 may_be_inlined
= 1;
18482 if (tag
== DW_TAG_imported_unit
)
18484 d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
18485 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18486 || cu
->per_cu
->is_dwz
);
18490 case DW_AT_main_subprogram
:
18491 main_subprogram
= DW_UNSND (&attr
);
18499 if (high_pc_relative
)
18502 if (has_low_pc_attr
&& has_high_pc_attr
)
18504 /* When using the GNU linker, .gnu.linkonce. sections are used to
18505 eliminate duplicate copies of functions and vtables and such.
18506 The linker will arbitrarily choose one and discard the others.
18507 The AT_*_pc values for such functions refer to local labels in
18508 these sections. If the section from that file was discarded, the
18509 labels are not in the output, so the relocs get a value of 0.
18510 If this is a discarded function, mark the pc bounds as invalid,
18511 so that GDB will ignore it. */
18512 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18514 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18515 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18517 complaint (&symfile_complaints
,
18518 _("DW_AT_low_pc %s is zero "
18519 "for DIE at %s [in module %s]"),
18520 paddress (gdbarch
, lowpc
),
18521 sect_offset_str (sect_off
),
18522 objfile_name (objfile
));
18524 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18525 else if (lowpc
>= highpc
)
18527 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18528 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18530 complaint (&symfile_complaints
,
18531 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18532 "for DIE at %s [in module %s]"),
18533 paddress (gdbarch
, lowpc
),
18534 paddress (gdbarch
, highpc
),
18535 sect_offset_str (sect_off
),
18536 objfile_name (objfile
));
18545 /* Find a cached partial DIE at OFFSET in CU. */
18547 struct partial_die_info
*
18548 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18550 struct partial_die_info
*lookup_die
= NULL
;
18551 struct partial_die_info
part_die (sect_off
);
18553 lookup_die
= ((struct partial_die_info
*)
18554 htab_find_with_hash (partial_dies
, &part_die
,
18555 to_underlying (sect_off
)));
18560 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18561 except in the case of .debug_types DIEs which do not reference
18562 outside their CU (they do however referencing other types via
18563 DW_FORM_ref_sig8). */
18565 static struct partial_die_info
*
18566 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18568 struct dwarf2_per_objfile
*dwarf2_per_objfile
18569 = cu
->per_cu
->dwarf2_per_objfile
;
18570 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18571 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18572 struct partial_die_info
*pd
= NULL
;
18574 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18575 && offset_in_cu_p (&cu
->header
, sect_off
))
18577 pd
= cu
->find_partial_die (sect_off
);
18580 /* We missed recording what we needed.
18581 Load all dies and try again. */
18582 per_cu
= cu
->per_cu
;
18586 /* TUs don't reference other CUs/TUs (except via type signatures). */
18587 if (cu
->per_cu
->is_debug_types
)
18589 error (_("Dwarf Error: Type Unit at offset %s contains"
18590 " external reference to offset %s [in module %s].\n"),
18591 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18592 bfd_get_filename (objfile
->obfd
));
18594 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18595 dwarf2_per_objfile
);
18597 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18598 load_partial_comp_unit (per_cu
);
18600 per_cu
->cu
->last_used
= 0;
18601 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18604 /* If we didn't find it, and not all dies have been loaded,
18605 load them all and try again. */
18607 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18609 per_cu
->load_all_dies
= 1;
18611 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18612 THIS_CU->cu may already be in use. So we can't just free it and
18613 replace its DIEs with the ones we read in. Instead, we leave those
18614 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18615 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18617 load_partial_comp_unit (per_cu
);
18619 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18623 internal_error (__FILE__
, __LINE__
,
18624 _("could not find partial DIE %s "
18625 "in cache [from module %s]\n"),
18626 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18630 /* See if we can figure out if the class lives in a namespace. We do
18631 this by looking for a member function; its demangled name will
18632 contain namespace info, if there is any. */
18635 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18636 struct dwarf2_cu
*cu
)
18638 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18639 what template types look like, because the demangler
18640 frequently doesn't give the same name as the debug info. We
18641 could fix this by only using the demangled name to get the
18642 prefix (but see comment in read_structure_type). */
18644 struct partial_die_info
*real_pdi
;
18645 struct partial_die_info
*child_pdi
;
18647 /* If this DIE (this DIE's specification, if any) has a parent, then
18648 we should not do this. We'll prepend the parent's fully qualified
18649 name when we create the partial symbol. */
18651 real_pdi
= struct_pdi
;
18652 while (real_pdi
->has_specification
)
18653 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
18654 real_pdi
->spec_is_dwz
, cu
);
18656 if (real_pdi
->die_parent
!= NULL
)
18659 for (child_pdi
= struct_pdi
->die_child
;
18661 child_pdi
= child_pdi
->die_sibling
)
18663 if (child_pdi
->tag
== DW_TAG_subprogram
18664 && child_pdi
->linkage_name
!= NULL
)
18666 char *actual_class_name
18667 = language_class_name_from_physname (cu
->language_defn
,
18668 child_pdi
->linkage_name
);
18669 if (actual_class_name
!= NULL
)
18671 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18674 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
18676 strlen (actual_class_name
)));
18677 xfree (actual_class_name
);
18685 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18687 /* Once we've fixed up a die, there's no point in doing so again.
18688 This also avoids a memory leak if we were to call
18689 guess_partial_die_structure_name multiple times. */
18693 /* If we found a reference attribute and the DIE has no name, try
18694 to find a name in the referred to DIE. */
18696 if (name
== NULL
&& has_specification
)
18698 struct partial_die_info
*spec_die
;
18700 spec_die
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18702 spec_die
->fixup (cu
);
18704 if (spec_die
->name
)
18706 name
= spec_die
->name
;
18708 /* Copy DW_AT_external attribute if it is set. */
18709 if (spec_die
->is_external
)
18710 is_external
= spec_die
->is_external
;
18714 /* Set default names for some unnamed DIEs. */
18716 if (name
== NULL
&& tag
== DW_TAG_namespace
)
18717 name
= CP_ANONYMOUS_NAMESPACE_STR
;
18719 /* If there is no parent die to provide a namespace, and there are
18720 children, see if we can determine the namespace from their linkage
18722 if (cu
->language
== language_cplus
18723 && !VEC_empty (dwarf2_section_info_def
,
18724 cu
->per_cu
->dwarf2_per_objfile
->types
)
18725 && die_parent
== NULL
18727 && (tag
== DW_TAG_class_type
18728 || tag
== DW_TAG_structure_type
18729 || tag
== DW_TAG_union_type
))
18730 guess_partial_die_structure_name (this, cu
);
18732 /* GCC might emit a nameless struct or union that has a linkage
18733 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18735 && (tag
== DW_TAG_class_type
18736 || tag
== DW_TAG_interface_type
18737 || tag
== DW_TAG_structure_type
18738 || tag
== DW_TAG_union_type
)
18739 && linkage_name
!= NULL
)
18743 demangled
= gdb_demangle (linkage_name
, DMGL_TYPES
);
18748 /* Strip any leading namespaces/classes, keep only the base name.
18749 DW_AT_name for named DIEs does not contain the prefixes. */
18750 base
= strrchr (demangled
, ':');
18751 if (base
&& base
> demangled
&& base
[-1] == ':')
18756 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18759 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
18760 base
, strlen (base
)));
18768 /* Read an attribute value described by an attribute form. */
18770 static const gdb_byte
*
18771 read_attribute_value (const struct die_reader_specs
*reader
,
18772 struct attribute
*attr
, unsigned form
,
18773 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
18775 struct dwarf2_cu
*cu
= reader
->cu
;
18776 struct dwarf2_per_objfile
*dwarf2_per_objfile
18777 = cu
->per_cu
->dwarf2_per_objfile
;
18778 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18779 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18780 bfd
*abfd
= reader
->abfd
;
18781 struct comp_unit_head
*cu_header
= &cu
->header
;
18782 unsigned int bytes_read
;
18783 struct dwarf_block
*blk
;
18785 attr
->form
= (enum dwarf_form
) form
;
18788 case DW_FORM_ref_addr
:
18789 if (cu
->header
.version
== 2)
18790 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18792 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
18793 &cu
->header
, &bytes_read
);
18794 info_ptr
+= bytes_read
;
18796 case DW_FORM_GNU_ref_alt
:
18797 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18798 info_ptr
+= bytes_read
;
18801 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18802 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
18803 info_ptr
+= bytes_read
;
18805 case DW_FORM_block2
:
18806 blk
= dwarf_alloc_block (cu
);
18807 blk
->size
= read_2_bytes (abfd
, info_ptr
);
18809 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18810 info_ptr
+= blk
->size
;
18811 DW_BLOCK (attr
) = blk
;
18813 case DW_FORM_block4
:
18814 blk
= dwarf_alloc_block (cu
);
18815 blk
->size
= read_4_bytes (abfd
, info_ptr
);
18817 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18818 info_ptr
+= blk
->size
;
18819 DW_BLOCK (attr
) = blk
;
18821 case DW_FORM_data2
:
18822 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
18825 case DW_FORM_data4
:
18826 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
18829 case DW_FORM_data8
:
18830 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
18833 case DW_FORM_data16
:
18834 blk
= dwarf_alloc_block (cu
);
18836 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
18838 DW_BLOCK (attr
) = blk
;
18840 case DW_FORM_sec_offset
:
18841 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18842 info_ptr
+= bytes_read
;
18844 case DW_FORM_string
:
18845 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
18846 DW_STRING_IS_CANONICAL (attr
) = 0;
18847 info_ptr
+= bytes_read
;
18850 if (!cu
->per_cu
->is_dwz
)
18852 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
18853 abfd
, info_ptr
, cu_header
,
18855 DW_STRING_IS_CANONICAL (attr
) = 0;
18856 info_ptr
+= bytes_read
;
18860 case DW_FORM_line_strp
:
18861 if (!cu
->per_cu
->is_dwz
)
18863 DW_STRING (attr
) = read_indirect_line_string (dwarf2_per_objfile
,
18865 cu_header
, &bytes_read
);
18866 DW_STRING_IS_CANONICAL (attr
) = 0;
18867 info_ptr
+= bytes_read
;
18871 case DW_FORM_GNU_strp_alt
:
18873 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
18874 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
18877 DW_STRING (attr
) = read_indirect_string_from_dwz (objfile
,
18879 DW_STRING_IS_CANONICAL (attr
) = 0;
18880 info_ptr
+= bytes_read
;
18883 case DW_FORM_exprloc
:
18884 case DW_FORM_block
:
18885 blk
= dwarf_alloc_block (cu
);
18886 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18887 info_ptr
+= bytes_read
;
18888 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18889 info_ptr
+= blk
->size
;
18890 DW_BLOCK (attr
) = blk
;
18892 case DW_FORM_block1
:
18893 blk
= dwarf_alloc_block (cu
);
18894 blk
->size
= read_1_byte (abfd
, info_ptr
);
18896 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18897 info_ptr
+= blk
->size
;
18898 DW_BLOCK (attr
) = blk
;
18900 case DW_FORM_data1
:
18901 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
18905 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
18908 case DW_FORM_flag_present
:
18909 DW_UNSND (attr
) = 1;
18911 case DW_FORM_sdata
:
18912 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
18913 info_ptr
+= bytes_read
;
18915 case DW_FORM_udata
:
18916 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18917 info_ptr
+= bytes_read
;
18920 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18921 + read_1_byte (abfd
, info_ptr
));
18925 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18926 + read_2_bytes (abfd
, info_ptr
));
18930 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18931 + read_4_bytes (abfd
, info_ptr
));
18935 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18936 + read_8_bytes (abfd
, info_ptr
));
18939 case DW_FORM_ref_sig8
:
18940 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
18943 case DW_FORM_ref_udata
:
18944 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18945 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
18946 info_ptr
+= bytes_read
;
18948 case DW_FORM_indirect
:
18949 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18950 info_ptr
+= bytes_read
;
18951 if (form
== DW_FORM_implicit_const
)
18953 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
18954 info_ptr
+= bytes_read
;
18956 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
18959 case DW_FORM_implicit_const
:
18960 DW_SND (attr
) = implicit_const
;
18962 case DW_FORM_GNU_addr_index
:
18963 if (reader
->dwo_file
== NULL
)
18965 /* For now flag a hard error.
18966 Later we can turn this into a complaint. */
18967 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
18968 dwarf_form_name (form
),
18969 bfd_get_filename (abfd
));
18971 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
18972 info_ptr
+= bytes_read
;
18974 case DW_FORM_GNU_str_index
:
18975 if (reader
->dwo_file
== NULL
)
18977 /* For now flag a hard error.
18978 Later we can turn this into a complaint if warranted. */
18979 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
18980 dwarf_form_name (form
),
18981 bfd_get_filename (abfd
));
18984 ULONGEST str_index
=
18985 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18987 DW_STRING (attr
) = read_str_index (reader
, str_index
);
18988 DW_STRING_IS_CANONICAL (attr
) = 0;
18989 info_ptr
+= bytes_read
;
18993 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
18994 dwarf_form_name (form
),
18995 bfd_get_filename (abfd
));
18999 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
19000 attr
->form
= DW_FORM_GNU_ref_alt
;
19002 /* We have seen instances where the compiler tried to emit a byte
19003 size attribute of -1 which ended up being encoded as an unsigned
19004 0xffffffff. Although 0xffffffff is technically a valid size value,
19005 an object of this size seems pretty unlikely so we can relatively
19006 safely treat these cases as if the size attribute was invalid and
19007 treat them as zero by default. */
19008 if (attr
->name
== DW_AT_byte_size
19009 && form
== DW_FORM_data4
19010 && DW_UNSND (attr
) >= 0xffffffff)
19013 (&symfile_complaints
,
19014 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19015 hex_string (DW_UNSND (attr
)));
19016 DW_UNSND (attr
) = 0;
19022 /* Read an attribute described by an abbreviated attribute. */
19024 static const gdb_byte
*
19025 read_attribute (const struct die_reader_specs
*reader
,
19026 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19027 const gdb_byte
*info_ptr
)
19029 attr
->name
= abbrev
->name
;
19030 return read_attribute_value (reader
, attr
, abbrev
->form
,
19031 abbrev
->implicit_const
, info_ptr
);
19034 /* Read dwarf information from a buffer. */
19036 static unsigned int
19037 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
19039 return bfd_get_8 (abfd
, buf
);
19043 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
19045 return bfd_get_signed_8 (abfd
, buf
);
19048 static unsigned int
19049 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19051 return bfd_get_16 (abfd
, buf
);
19055 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19057 return bfd_get_signed_16 (abfd
, buf
);
19060 static unsigned int
19061 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19063 return bfd_get_32 (abfd
, buf
);
19067 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19069 return bfd_get_signed_32 (abfd
, buf
);
19073 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19075 return bfd_get_64 (abfd
, buf
);
19079 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
19080 unsigned int *bytes_read
)
19082 struct comp_unit_head
*cu_header
= &cu
->header
;
19083 CORE_ADDR retval
= 0;
19085 if (cu_header
->signed_addr_p
)
19087 switch (cu_header
->addr_size
)
19090 retval
= bfd_get_signed_16 (abfd
, buf
);
19093 retval
= bfd_get_signed_32 (abfd
, buf
);
19096 retval
= bfd_get_signed_64 (abfd
, buf
);
19099 internal_error (__FILE__
, __LINE__
,
19100 _("read_address: bad switch, signed [in module %s]"),
19101 bfd_get_filename (abfd
));
19106 switch (cu_header
->addr_size
)
19109 retval
= bfd_get_16 (abfd
, buf
);
19112 retval
= bfd_get_32 (abfd
, buf
);
19115 retval
= bfd_get_64 (abfd
, buf
);
19118 internal_error (__FILE__
, __LINE__
,
19119 _("read_address: bad switch, "
19120 "unsigned [in module %s]"),
19121 bfd_get_filename (abfd
));
19125 *bytes_read
= cu_header
->addr_size
;
19129 /* Read the initial length from a section. The (draft) DWARF 3
19130 specification allows the initial length to take up either 4 bytes
19131 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
19132 bytes describe the length and all offsets will be 8 bytes in length
19135 An older, non-standard 64-bit format is also handled by this
19136 function. The older format in question stores the initial length
19137 as an 8-byte quantity without an escape value. Lengths greater
19138 than 2^32 aren't very common which means that the initial 4 bytes
19139 is almost always zero. Since a length value of zero doesn't make
19140 sense for the 32-bit format, this initial zero can be considered to
19141 be an escape value which indicates the presence of the older 64-bit
19142 format. As written, the code can't detect (old format) lengths
19143 greater than 4GB. If it becomes necessary to handle lengths
19144 somewhat larger than 4GB, we could allow other small values (such
19145 as the non-sensical values of 1, 2, and 3) to also be used as
19146 escape values indicating the presence of the old format.
19148 The value returned via bytes_read should be used to increment the
19149 relevant pointer after calling read_initial_length().
19151 [ Note: read_initial_length() and read_offset() are based on the
19152 document entitled "DWARF Debugging Information Format", revision
19153 3, draft 8, dated November 19, 2001. This document was obtained
19156 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
19158 This document is only a draft and is subject to change. (So beware.)
19160 Details regarding the older, non-standard 64-bit format were
19161 determined empirically by examining 64-bit ELF files produced by
19162 the SGI toolchain on an IRIX 6.5 machine.
19164 - Kevin, July 16, 2002
19168 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
19170 LONGEST length
= bfd_get_32 (abfd
, buf
);
19172 if (length
== 0xffffffff)
19174 length
= bfd_get_64 (abfd
, buf
+ 4);
19177 else if (length
== 0)
19179 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
19180 length
= bfd_get_64 (abfd
, buf
);
19191 /* Cover function for read_initial_length.
19192 Returns the length of the object at BUF, and stores the size of the
19193 initial length in *BYTES_READ and stores the size that offsets will be in
19195 If the initial length size is not equivalent to that specified in
19196 CU_HEADER then issue a complaint.
19197 This is useful when reading non-comp-unit headers. */
19200 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
19201 const struct comp_unit_head
*cu_header
,
19202 unsigned int *bytes_read
,
19203 unsigned int *offset_size
)
19205 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
19207 gdb_assert (cu_header
->initial_length_size
== 4
19208 || cu_header
->initial_length_size
== 8
19209 || cu_header
->initial_length_size
== 12);
19211 if (cu_header
->initial_length_size
!= *bytes_read
)
19212 complaint (&symfile_complaints
,
19213 _("intermixed 32-bit and 64-bit DWARF sections"));
19215 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
19219 /* Read an offset from the data stream. The size of the offset is
19220 given by cu_header->offset_size. */
19223 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
19224 const struct comp_unit_head
*cu_header
,
19225 unsigned int *bytes_read
)
19227 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
19229 *bytes_read
= cu_header
->offset_size
;
19233 /* Read an offset from the data stream. */
19236 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
19238 LONGEST retval
= 0;
19240 switch (offset_size
)
19243 retval
= bfd_get_32 (abfd
, buf
);
19246 retval
= bfd_get_64 (abfd
, buf
);
19249 internal_error (__FILE__
, __LINE__
,
19250 _("read_offset_1: bad switch [in module %s]"),
19251 bfd_get_filename (abfd
));
19257 static const gdb_byte
*
19258 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
19260 /* If the size of a host char is 8 bits, we can return a pointer
19261 to the buffer, otherwise we have to copy the data to a buffer
19262 allocated on the temporary obstack. */
19263 gdb_assert (HOST_CHAR_BIT
== 8);
19267 static const char *
19268 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
19269 unsigned int *bytes_read_ptr
)
19271 /* If the size of a host char is 8 bits, we can return a pointer
19272 to the string, otherwise we have to copy the string to a buffer
19273 allocated on the temporary obstack. */
19274 gdb_assert (HOST_CHAR_BIT
== 8);
19277 *bytes_read_ptr
= 1;
19280 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
19281 return (const char *) buf
;
19284 /* Return pointer to string at section SECT offset STR_OFFSET with error
19285 reporting strings FORM_NAME and SECT_NAME. */
19287 static const char *
19288 read_indirect_string_at_offset_from (struct objfile
*objfile
,
19289 bfd
*abfd
, LONGEST str_offset
,
19290 struct dwarf2_section_info
*sect
,
19291 const char *form_name
,
19292 const char *sect_name
)
19294 dwarf2_read_section (objfile
, sect
);
19295 if (sect
->buffer
== NULL
)
19296 error (_("%s used without %s section [in module %s]"),
19297 form_name
, sect_name
, bfd_get_filename (abfd
));
19298 if (str_offset
>= sect
->size
)
19299 error (_("%s pointing outside of %s section [in module %s]"),
19300 form_name
, sect_name
, bfd_get_filename (abfd
));
19301 gdb_assert (HOST_CHAR_BIT
== 8);
19302 if (sect
->buffer
[str_offset
] == '\0')
19304 return (const char *) (sect
->buffer
+ str_offset
);
19307 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19309 static const char *
19310 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19311 bfd
*abfd
, LONGEST str_offset
)
19313 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19315 &dwarf2_per_objfile
->str
,
19316 "DW_FORM_strp", ".debug_str");
19319 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
19321 static const char *
19322 read_indirect_line_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19323 bfd
*abfd
, LONGEST str_offset
)
19325 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19327 &dwarf2_per_objfile
->line_str
,
19328 "DW_FORM_line_strp",
19329 ".debug_line_str");
19332 /* Read a string at offset STR_OFFSET in the .debug_str section from
19333 the .dwz file DWZ. Throw an error if the offset is too large. If
19334 the string consists of a single NUL byte, return NULL; otherwise
19335 return a pointer to the string. */
19337 static const char *
19338 read_indirect_string_from_dwz (struct objfile
*objfile
, struct dwz_file
*dwz
,
19339 LONGEST str_offset
)
19341 dwarf2_read_section (objfile
, &dwz
->str
);
19343 if (dwz
->str
.buffer
== NULL
)
19344 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
19345 "section [in module %s]"),
19346 bfd_get_filename (dwz
->dwz_bfd
));
19347 if (str_offset
>= dwz
->str
.size
)
19348 error (_("DW_FORM_GNU_strp_alt pointing outside of "
19349 ".debug_str section [in module %s]"),
19350 bfd_get_filename (dwz
->dwz_bfd
));
19351 gdb_assert (HOST_CHAR_BIT
== 8);
19352 if (dwz
->str
.buffer
[str_offset
] == '\0')
19354 return (const char *) (dwz
->str
.buffer
+ str_offset
);
19357 /* Return pointer to string at .debug_str offset as read from BUF.
19358 BUF is assumed to be in a compilation unit described by CU_HEADER.
19359 Return *BYTES_READ_PTR count of bytes read from BUF. */
19361 static const char *
19362 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19363 const gdb_byte
*buf
,
19364 const struct comp_unit_head
*cu_header
,
19365 unsigned int *bytes_read_ptr
)
19367 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19369 return read_indirect_string_at_offset (dwarf2_per_objfile
, abfd
, str_offset
);
19372 /* Return pointer to string at .debug_line_str offset as read from BUF.
19373 BUF is assumed to be in a compilation unit described by CU_HEADER.
19374 Return *BYTES_READ_PTR count of bytes read from BUF. */
19376 static const char *
19377 read_indirect_line_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19378 bfd
*abfd
, const gdb_byte
*buf
,
19379 const struct comp_unit_head
*cu_header
,
19380 unsigned int *bytes_read_ptr
)
19382 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19384 return read_indirect_line_string_at_offset (dwarf2_per_objfile
, abfd
,
19389 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19390 unsigned int *bytes_read_ptr
)
19393 unsigned int num_read
;
19395 unsigned char byte
;
19402 byte
= bfd_get_8 (abfd
, buf
);
19405 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19406 if ((byte
& 128) == 0)
19412 *bytes_read_ptr
= num_read
;
19417 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19418 unsigned int *bytes_read_ptr
)
19421 int shift
, num_read
;
19422 unsigned char byte
;
19429 byte
= bfd_get_8 (abfd
, buf
);
19432 result
|= ((LONGEST
) (byte
& 127) << shift
);
19434 if ((byte
& 128) == 0)
19439 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
19440 result
|= -(((LONGEST
) 1) << shift
);
19441 *bytes_read_ptr
= num_read
;
19445 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19446 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
19447 ADDR_SIZE is the size of addresses from the CU header. */
19450 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19451 unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
19453 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19454 bfd
*abfd
= objfile
->obfd
;
19455 const gdb_byte
*info_ptr
;
19457 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
19458 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19459 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19460 objfile_name (objfile
));
19461 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
19462 error (_("DW_FORM_addr_index pointing outside of "
19463 ".debug_addr section [in module %s]"),
19464 objfile_name (objfile
));
19465 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19466 + addr_base
+ addr_index
* addr_size
);
19467 if (addr_size
== 4)
19468 return bfd_get_32 (abfd
, info_ptr
);
19470 return bfd_get_64 (abfd
, info_ptr
);
19473 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19476 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19478 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19479 cu
->addr_base
, cu
->header
.addr_size
);
19482 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19485 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19486 unsigned int *bytes_read
)
19488 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19489 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19491 return read_addr_index (cu
, addr_index
);
19494 /* Data structure to pass results from dwarf2_read_addr_index_reader
19495 back to dwarf2_read_addr_index. */
19497 struct dwarf2_read_addr_index_data
19499 ULONGEST addr_base
;
19503 /* die_reader_func for dwarf2_read_addr_index. */
19506 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
19507 const gdb_byte
*info_ptr
,
19508 struct die_info
*comp_unit_die
,
19512 struct dwarf2_cu
*cu
= reader
->cu
;
19513 struct dwarf2_read_addr_index_data
*aidata
=
19514 (struct dwarf2_read_addr_index_data
*) data
;
19516 aidata
->addr_base
= cu
->addr_base
;
19517 aidata
->addr_size
= cu
->header
.addr_size
;
19520 /* Given an index in .debug_addr, fetch the value.
19521 NOTE: This can be called during dwarf expression evaluation,
19522 long after the debug information has been read, and thus per_cu->cu
19523 may no longer exist. */
19526 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
19527 unsigned int addr_index
)
19529 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19530 struct dwarf2_cu
*cu
= per_cu
->cu
;
19531 ULONGEST addr_base
;
19534 /* We need addr_base and addr_size.
19535 If we don't have PER_CU->cu, we have to get it.
19536 Nasty, but the alternative is storing the needed info in PER_CU,
19537 which at this point doesn't seem justified: it's not clear how frequently
19538 it would get used and it would increase the size of every PER_CU.
19539 Entry points like dwarf2_per_cu_addr_size do a similar thing
19540 so we're not in uncharted territory here.
19541 Alas we need to be a bit more complicated as addr_base is contained
19544 We don't need to read the entire CU(/TU).
19545 We just need the header and top level die.
19547 IWBN to use the aging mechanism to let us lazily later discard the CU.
19548 For now we skip this optimization. */
19552 addr_base
= cu
->addr_base
;
19553 addr_size
= cu
->header
.addr_size
;
19557 struct dwarf2_read_addr_index_data aidata
;
19559 /* Note: We can't use init_cutu_and_read_dies_simple here,
19560 we need addr_base. */
19561 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
19562 dwarf2_read_addr_index_reader
, &aidata
);
19563 addr_base
= aidata
.addr_base
;
19564 addr_size
= aidata
.addr_size
;
19567 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19571 /* Given a DW_FORM_GNU_str_index, fetch the string.
19572 This is only used by the Fission support. */
19574 static const char *
19575 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19577 struct dwarf2_cu
*cu
= reader
->cu
;
19578 struct dwarf2_per_objfile
*dwarf2_per_objfile
19579 = cu
->per_cu
->dwarf2_per_objfile
;
19580 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19581 const char *objf_name
= objfile_name (objfile
);
19582 bfd
*abfd
= objfile
->obfd
;
19583 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
19584 struct dwarf2_section_info
*str_offsets_section
=
19585 &reader
->dwo_file
->sections
.str_offsets
;
19586 const gdb_byte
*info_ptr
;
19587 ULONGEST str_offset
;
19588 static const char form_name
[] = "DW_FORM_GNU_str_index";
19590 dwarf2_read_section (objfile
, str_section
);
19591 dwarf2_read_section (objfile
, str_offsets_section
);
19592 if (str_section
->buffer
== NULL
)
19593 error (_("%s used without .debug_str.dwo section"
19594 " in CU at offset %s [in module %s]"),
19595 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19596 if (str_offsets_section
->buffer
== NULL
)
19597 error (_("%s used without .debug_str_offsets.dwo section"
19598 " in CU at offset %s [in module %s]"),
19599 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19600 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
19601 error (_("%s pointing outside of .debug_str_offsets.dwo"
19602 " section in CU at offset %s [in module %s]"),
19603 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19604 info_ptr
= (str_offsets_section
->buffer
19605 + str_index
* cu
->header
.offset_size
);
19606 if (cu
->header
.offset_size
== 4)
19607 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19609 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19610 if (str_offset
>= str_section
->size
)
19611 error (_("Offset from %s pointing outside of"
19612 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19613 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19614 return (const char *) (str_section
->buffer
+ str_offset
);
19617 /* Return the length of an LEB128 number in BUF. */
19620 leb128_size (const gdb_byte
*buf
)
19622 const gdb_byte
*begin
= buf
;
19628 if ((byte
& 128) == 0)
19629 return buf
- begin
;
19634 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19643 cu
->language
= language_c
;
19646 case DW_LANG_C_plus_plus
:
19647 case DW_LANG_C_plus_plus_11
:
19648 case DW_LANG_C_plus_plus_14
:
19649 cu
->language
= language_cplus
;
19652 cu
->language
= language_d
;
19654 case DW_LANG_Fortran77
:
19655 case DW_LANG_Fortran90
:
19656 case DW_LANG_Fortran95
:
19657 case DW_LANG_Fortran03
:
19658 case DW_LANG_Fortran08
:
19659 cu
->language
= language_fortran
;
19662 cu
->language
= language_go
;
19664 case DW_LANG_Mips_Assembler
:
19665 cu
->language
= language_asm
;
19667 case DW_LANG_Ada83
:
19668 case DW_LANG_Ada95
:
19669 cu
->language
= language_ada
;
19671 case DW_LANG_Modula2
:
19672 cu
->language
= language_m2
;
19674 case DW_LANG_Pascal83
:
19675 cu
->language
= language_pascal
;
19678 cu
->language
= language_objc
;
19681 case DW_LANG_Rust_old
:
19682 cu
->language
= language_rust
;
19684 case DW_LANG_Cobol74
:
19685 case DW_LANG_Cobol85
:
19687 cu
->language
= language_minimal
;
19690 cu
->language_defn
= language_def (cu
->language
);
19693 /* Return the named attribute or NULL if not there. */
19695 static struct attribute
*
19696 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19701 struct attribute
*spec
= NULL
;
19703 for (i
= 0; i
< die
->num_attrs
; ++i
)
19705 if (die
->attrs
[i
].name
== name
)
19706 return &die
->attrs
[i
];
19707 if (die
->attrs
[i
].name
== DW_AT_specification
19708 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19709 spec
= &die
->attrs
[i
];
19715 die
= follow_die_ref (die
, spec
, &cu
);
19721 /* Return the named attribute or NULL if not there,
19722 but do not follow DW_AT_specification, etc.
19723 This is for use in contexts where we're reading .debug_types dies.
19724 Following DW_AT_specification, DW_AT_abstract_origin will take us
19725 back up the chain, and we want to go down. */
19727 static struct attribute
*
19728 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
19732 for (i
= 0; i
< die
->num_attrs
; ++i
)
19733 if (die
->attrs
[i
].name
== name
)
19734 return &die
->attrs
[i
];
19739 /* Return the string associated with a string-typed attribute, or NULL if it
19740 is either not found or is of an incorrect type. */
19742 static const char *
19743 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19745 struct attribute
*attr
;
19746 const char *str
= NULL
;
19748 attr
= dwarf2_attr (die
, name
, cu
);
19752 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
19753 || attr
->form
== DW_FORM_string
19754 || attr
->form
== DW_FORM_GNU_str_index
19755 || attr
->form
== DW_FORM_GNU_strp_alt
)
19756 str
= DW_STRING (attr
);
19758 complaint (&symfile_complaints
,
19759 _("string type expected for attribute %s for "
19760 "DIE at %s in module %s"),
19761 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
19762 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
19768 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19769 and holds a non-zero value. This function should only be used for
19770 DW_FORM_flag or DW_FORM_flag_present attributes. */
19773 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19775 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19777 return (attr
&& DW_UNSND (attr
));
19781 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19783 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19784 which value is non-zero. However, we have to be careful with
19785 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19786 (via dwarf2_flag_true_p) follows this attribute. So we may
19787 end up accidently finding a declaration attribute that belongs
19788 to a different DIE referenced by the specification attribute,
19789 even though the given DIE does not have a declaration attribute. */
19790 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19791 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19794 /* Return the die giving the specification for DIE, if there is
19795 one. *SPEC_CU is the CU containing DIE on input, and the CU
19796 containing the return value on output. If there is no
19797 specification, but there is an abstract origin, that is
19800 static struct die_info
*
19801 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19803 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19806 if (spec_attr
== NULL
)
19807 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19809 if (spec_attr
== NULL
)
19812 return follow_die_ref (die
, spec_attr
, spec_cu
);
19815 /* Stub for free_line_header to match void * callback types. */
19818 free_line_header_voidp (void *arg
)
19820 struct line_header
*lh
= (struct line_header
*) arg
;
19826 line_header::add_include_dir (const char *include_dir
)
19828 if (dwarf_line_debug
>= 2)
19829 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
19830 include_dirs
.size () + 1, include_dir
);
19832 include_dirs
.push_back (include_dir
);
19836 line_header::add_file_name (const char *name
,
19838 unsigned int mod_time
,
19839 unsigned int length
)
19841 if (dwarf_line_debug
>= 2)
19842 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
19843 (unsigned) file_names
.size () + 1, name
);
19845 file_names
.emplace_back (name
, d_index
, mod_time
, length
);
19848 /* A convenience function to find the proper .debug_line section for a CU. */
19850 static struct dwarf2_section_info
*
19851 get_debug_line_section (struct dwarf2_cu
*cu
)
19853 struct dwarf2_section_info
*section
;
19854 struct dwarf2_per_objfile
*dwarf2_per_objfile
19855 = cu
->per_cu
->dwarf2_per_objfile
;
19857 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
19859 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19860 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
19861 else if (cu
->per_cu
->is_dwz
)
19863 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19865 section
= &dwz
->line
;
19868 section
= &dwarf2_per_objfile
->line
;
19873 /* Read directory or file name entry format, starting with byte of
19874 format count entries, ULEB128 pairs of entry formats, ULEB128 of
19875 entries count and the entries themselves in the described entry
19879 read_formatted_entries (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19880 bfd
*abfd
, const gdb_byte
**bufp
,
19881 struct line_header
*lh
,
19882 const struct comp_unit_head
*cu_header
,
19883 void (*callback
) (struct line_header
*lh
,
19886 unsigned int mod_time
,
19887 unsigned int length
))
19889 gdb_byte format_count
, formati
;
19890 ULONGEST data_count
, datai
;
19891 const gdb_byte
*buf
= *bufp
;
19892 const gdb_byte
*format_header_data
;
19893 unsigned int bytes_read
;
19895 format_count
= read_1_byte (abfd
, buf
);
19897 format_header_data
= buf
;
19898 for (formati
= 0; formati
< format_count
; formati
++)
19900 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
19902 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
19906 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
19908 for (datai
= 0; datai
< data_count
; datai
++)
19910 const gdb_byte
*format
= format_header_data
;
19911 struct file_entry fe
;
19913 for (formati
= 0; formati
< format_count
; formati
++)
19915 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
19916 format
+= bytes_read
;
19918 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
19919 format
+= bytes_read
;
19921 gdb::optional
<const char *> string
;
19922 gdb::optional
<unsigned int> uint
;
19926 case DW_FORM_string
:
19927 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
19931 case DW_FORM_line_strp
:
19932 string
.emplace (read_indirect_line_string (dwarf2_per_objfile
,
19939 case DW_FORM_data1
:
19940 uint
.emplace (read_1_byte (abfd
, buf
));
19944 case DW_FORM_data2
:
19945 uint
.emplace (read_2_bytes (abfd
, buf
));
19949 case DW_FORM_data4
:
19950 uint
.emplace (read_4_bytes (abfd
, buf
));
19954 case DW_FORM_data8
:
19955 uint
.emplace (read_8_bytes (abfd
, buf
));
19959 case DW_FORM_udata
:
19960 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
19964 case DW_FORM_block
:
19965 /* It is valid only for DW_LNCT_timestamp which is ignored by
19970 switch (content_type
)
19973 if (string
.has_value ())
19976 case DW_LNCT_directory_index
:
19977 if (uint
.has_value ())
19978 fe
.d_index
= (dir_index
) *uint
;
19980 case DW_LNCT_timestamp
:
19981 if (uint
.has_value ())
19982 fe
.mod_time
= *uint
;
19985 if (uint
.has_value ())
19991 complaint (&symfile_complaints
,
19992 _("Unknown format content type %s"),
19993 pulongest (content_type
));
19997 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
20003 /* Read the statement program header starting at OFFSET in
20004 .debug_line, or .debug_line.dwo. Return a pointer
20005 to a struct line_header, allocated using xmalloc.
20006 Returns NULL if there is a problem reading the header, e.g., if it
20007 has a version we don't understand.
20009 NOTE: the strings in the include directory and file name tables of
20010 the returned object point into the dwarf line section buffer,
20011 and must not be freed. */
20013 static line_header_up
20014 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
20016 const gdb_byte
*line_ptr
;
20017 unsigned int bytes_read
, offset_size
;
20019 const char *cur_dir
, *cur_file
;
20020 struct dwarf2_section_info
*section
;
20022 struct dwarf2_per_objfile
*dwarf2_per_objfile
20023 = cu
->per_cu
->dwarf2_per_objfile
;
20025 section
= get_debug_line_section (cu
);
20026 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
20027 if (section
->buffer
== NULL
)
20029 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20030 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
20032 complaint (&symfile_complaints
, _("missing .debug_line section"));
20036 /* We can't do this until we know the section is non-empty.
20037 Only then do we know we have such a section. */
20038 abfd
= get_section_bfd_owner (section
);
20040 /* Make sure that at least there's room for the total_length field.
20041 That could be 12 bytes long, but we're just going to fudge that. */
20042 if (to_underlying (sect_off
) + 4 >= section
->size
)
20044 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20048 line_header_up
lh (new line_header ());
20050 lh
->sect_off
= sect_off
;
20051 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
20053 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
20055 /* Read in the header. */
20057 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
20058 &bytes_read
, &offset_size
);
20059 line_ptr
+= bytes_read
;
20060 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
20062 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20065 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
20066 lh
->version
= read_2_bytes (abfd
, line_ptr
);
20068 if (lh
->version
> 5)
20070 /* This is a version we don't understand. The format could have
20071 changed in ways we don't handle properly so just punt. */
20072 complaint (&symfile_complaints
,
20073 _("unsupported version in .debug_line section"));
20076 if (lh
->version
>= 5)
20078 gdb_byte segment_selector_size
;
20080 /* Skip address size. */
20081 read_1_byte (abfd
, line_ptr
);
20084 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
20086 if (segment_selector_size
!= 0)
20088 complaint (&symfile_complaints
,
20089 _("unsupported segment selector size %u "
20090 "in .debug_line section"),
20091 segment_selector_size
);
20095 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
20096 line_ptr
+= offset_size
;
20097 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
20099 if (lh
->version
>= 4)
20101 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
20105 lh
->maximum_ops_per_instruction
= 1;
20107 if (lh
->maximum_ops_per_instruction
== 0)
20109 lh
->maximum_ops_per_instruction
= 1;
20110 complaint (&symfile_complaints
,
20111 _("invalid maximum_ops_per_instruction "
20112 "in `.debug_line' section"));
20115 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
20117 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
20119 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
20121 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
20123 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
20125 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
20126 for (i
= 1; i
< lh
->opcode_base
; ++i
)
20128 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
20132 if (lh
->version
>= 5)
20134 /* Read directory table. */
20135 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20137 [] (struct line_header
*lh
, const char *name
,
20138 dir_index d_index
, unsigned int mod_time
,
20139 unsigned int length
)
20141 lh
->add_include_dir (name
);
20144 /* Read file name table. */
20145 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20147 [] (struct line_header
*lh
, const char *name
,
20148 dir_index d_index
, unsigned int mod_time
,
20149 unsigned int length
)
20151 lh
->add_file_name (name
, d_index
, mod_time
, length
);
20156 /* Read directory table. */
20157 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20159 line_ptr
+= bytes_read
;
20160 lh
->add_include_dir (cur_dir
);
20162 line_ptr
+= bytes_read
;
20164 /* Read file name table. */
20165 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20167 unsigned int mod_time
, length
;
20170 line_ptr
+= bytes_read
;
20171 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20172 line_ptr
+= bytes_read
;
20173 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20174 line_ptr
+= bytes_read
;
20175 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20176 line_ptr
+= bytes_read
;
20178 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
20180 line_ptr
+= bytes_read
;
20182 lh
->statement_program_start
= line_ptr
;
20184 if (line_ptr
> (section
->buffer
+ section
->size
))
20185 complaint (&symfile_complaints
,
20186 _("line number info header doesn't "
20187 "fit in `.debug_line' section"));
20192 /* Subroutine of dwarf_decode_lines to simplify it.
20193 Return the file name of the psymtab for included file FILE_INDEX
20194 in line header LH of PST.
20195 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20196 If space for the result is malloc'd, *NAME_HOLDER will be set.
20197 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
20199 static const char *
20200 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
20201 const struct partial_symtab
*pst
,
20202 const char *comp_dir
,
20203 gdb::unique_xmalloc_ptr
<char> *name_holder
)
20205 const file_entry
&fe
= lh
->file_names
[file_index
];
20206 const char *include_name
= fe
.name
;
20207 const char *include_name_to_compare
= include_name
;
20208 const char *pst_filename
;
20211 const char *dir_name
= fe
.include_dir (lh
);
20213 gdb::unique_xmalloc_ptr
<char> hold_compare
;
20214 if (!IS_ABSOLUTE_PATH (include_name
)
20215 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
20217 /* Avoid creating a duplicate psymtab for PST.
20218 We do this by comparing INCLUDE_NAME and PST_FILENAME.
20219 Before we do the comparison, however, we need to account
20220 for DIR_NAME and COMP_DIR.
20221 First prepend dir_name (if non-NULL). If we still don't
20222 have an absolute path prepend comp_dir (if non-NULL).
20223 However, the directory we record in the include-file's
20224 psymtab does not contain COMP_DIR (to match the
20225 corresponding symtab(s)).
20230 bash$ gcc -g ./hello.c
20231 include_name = "hello.c"
20233 DW_AT_comp_dir = comp_dir = "/tmp"
20234 DW_AT_name = "./hello.c"
20238 if (dir_name
!= NULL
)
20240 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
20241 include_name
, (char *) NULL
));
20242 include_name
= name_holder
->get ();
20243 include_name_to_compare
= include_name
;
20245 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
20247 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
20248 include_name
, (char *) NULL
));
20249 include_name_to_compare
= hold_compare
.get ();
20253 pst_filename
= pst
->filename
;
20254 gdb::unique_xmalloc_ptr
<char> copied_name
;
20255 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
20257 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
20258 pst_filename
, (char *) NULL
));
20259 pst_filename
= copied_name
.get ();
20262 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
20266 return include_name
;
20269 /* State machine to track the state of the line number program. */
20271 class lnp_state_machine
20274 /* Initialize a machine state for the start of a line number
20276 lnp_state_machine (gdbarch
*arch
, line_header
*lh
, bool record_lines_p
);
20278 file_entry
*current_file ()
20280 /* lh->file_names is 0-based, but the file name numbers in the
20281 statement program are 1-based. */
20282 return m_line_header
->file_name_at (m_file
);
20285 /* Record the line in the state machine. END_SEQUENCE is true if
20286 we're processing the end of a sequence. */
20287 void record_line (bool end_sequence
);
20289 /* Check address and if invalid nop-out the rest of the lines in this
20291 void check_line_address (struct dwarf2_cu
*cu
,
20292 const gdb_byte
*line_ptr
,
20293 CORE_ADDR lowpc
, CORE_ADDR address
);
20295 void handle_set_discriminator (unsigned int discriminator
)
20297 m_discriminator
= discriminator
;
20298 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
20301 /* Handle DW_LNE_set_address. */
20302 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
20305 address
+= baseaddr
;
20306 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
20309 /* Handle DW_LNS_advance_pc. */
20310 void handle_advance_pc (CORE_ADDR adjust
);
20312 /* Handle a special opcode. */
20313 void handle_special_opcode (unsigned char op_code
);
20315 /* Handle DW_LNS_advance_line. */
20316 void handle_advance_line (int line_delta
)
20318 advance_line (line_delta
);
20321 /* Handle DW_LNS_set_file. */
20322 void handle_set_file (file_name_index file
);
20324 /* Handle DW_LNS_negate_stmt. */
20325 void handle_negate_stmt ()
20327 m_is_stmt
= !m_is_stmt
;
20330 /* Handle DW_LNS_const_add_pc. */
20331 void handle_const_add_pc ();
20333 /* Handle DW_LNS_fixed_advance_pc. */
20334 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
20336 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20340 /* Handle DW_LNS_copy. */
20341 void handle_copy ()
20343 record_line (false);
20344 m_discriminator
= 0;
20347 /* Handle DW_LNE_end_sequence. */
20348 void handle_end_sequence ()
20350 m_record_line_callback
= ::record_line
;
20354 /* Advance the line by LINE_DELTA. */
20355 void advance_line (int line_delta
)
20357 m_line
+= line_delta
;
20359 if (line_delta
!= 0)
20360 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20363 gdbarch
*m_gdbarch
;
20365 /* True if we're recording lines.
20366 Otherwise we're building partial symtabs and are just interested in
20367 finding include files mentioned by the line number program. */
20368 bool m_record_lines_p
;
20370 /* The line number header. */
20371 line_header
*m_line_header
;
20373 /* These are part of the standard DWARF line number state machine,
20374 and initialized according to the DWARF spec. */
20376 unsigned char m_op_index
= 0;
20377 /* The line table index (1-based) of the current file. */
20378 file_name_index m_file
= (file_name_index
) 1;
20379 unsigned int m_line
= 1;
20381 /* These are initialized in the constructor. */
20383 CORE_ADDR m_address
;
20385 unsigned int m_discriminator
;
20387 /* Additional bits of state we need to track. */
20389 /* The last file that we called dwarf2_start_subfile for.
20390 This is only used for TLLs. */
20391 unsigned int m_last_file
= 0;
20392 /* The last file a line number was recorded for. */
20393 struct subfile
*m_last_subfile
= NULL
;
20395 /* The function to call to record a line. */
20396 record_line_ftype
*m_record_line_callback
= NULL
;
20398 /* The last line number that was recorded, used to coalesce
20399 consecutive entries for the same line. This can happen, for
20400 example, when discriminators are present. PR 17276. */
20401 unsigned int m_last_line
= 0;
20402 bool m_line_has_non_zero_discriminator
= false;
20406 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
20408 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
20409 / m_line_header
->maximum_ops_per_instruction
)
20410 * m_line_header
->minimum_instruction_length
);
20411 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20412 m_op_index
= ((m_op_index
+ adjust
)
20413 % m_line_header
->maximum_ops_per_instruction
);
20417 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
20419 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
20420 CORE_ADDR addr_adj
= (((m_op_index
20421 + (adj_opcode
/ m_line_header
->line_range
))
20422 / m_line_header
->maximum_ops_per_instruction
)
20423 * m_line_header
->minimum_instruction_length
);
20424 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20425 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
20426 % m_line_header
->maximum_ops_per_instruction
);
20428 int line_delta
= (m_line_header
->line_base
20429 + (adj_opcode
% m_line_header
->line_range
));
20430 advance_line (line_delta
);
20431 record_line (false);
20432 m_discriminator
= 0;
20436 lnp_state_machine::handle_set_file (file_name_index file
)
20440 const file_entry
*fe
= current_file ();
20442 dwarf2_debug_line_missing_file_complaint ();
20443 else if (m_record_lines_p
)
20445 const char *dir
= fe
->include_dir (m_line_header
);
20447 m_last_subfile
= current_subfile
;
20448 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20449 dwarf2_start_subfile (fe
->name
, dir
);
20454 lnp_state_machine::handle_const_add_pc ()
20457 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
20460 = (((m_op_index
+ adjust
)
20461 / m_line_header
->maximum_ops_per_instruction
)
20462 * m_line_header
->minimum_instruction_length
);
20464 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20465 m_op_index
= ((m_op_index
+ adjust
)
20466 % m_line_header
->maximum_ops_per_instruction
);
20469 /* Ignore this record_line request. */
20472 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
20477 /* Return non-zero if we should add LINE to the line number table.
20478 LINE is the line to add, LAST_LINE is the last line that was added,
20479 LAST_SUBFILE is the subfile for LAST_LINE.
20480 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
20481 had a non-zero discriminator.
20483 We have to be careful in the presence of discriminators.
20484 E.g., for this line:
20486 for (i = 0; i < 100000; i++);
20488 clang can emit four line number entries for that one line,
20489 each with a different discriminator.
20490 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20492 However, we want gdb to coalesce all four entries into one.
20493 Otherwise the user could stepi into the middle of the line and
20494 gdb would get confused about whether the pc really was in the
20495 middle of the line.
20497 Things are further complicated by the fact that two consecutive
20498 line number entries for the same line is a heuristic used by gcc
20499 to denote the end of the prologue. So we can't just discard duplicate
20500 entries, we have to be selective about it. The heuristic we use is
20501 that we only collapse consecutive entries for the same line if at least
20502 one of those entries has a non-zero discriminator. PR 17276.
20504 Note: Addresses in the line number state machine can never go backwards
20505 within one sequence, thus this coalescing is ok. */
20508 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
20509 int line_has_non_zero_discriminator
,
20510 struct subfile
*last_subfile
)
20512 if (current_subfile
!= last_subfile
)
20514 if (line
!= last_line
)
20516 /* Same line for the same file that we've seen already.
20517 As a last check, for pr 17276, only record the line if the line
20518 has never had a non-zero discriminator. */
20519 if (!line_has_non_zero_discriminator
)
20524 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
20525 in the line table of subfile SUBFILE. */
20528 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20529 unsigned int line
, CORE_ADDR address
,
20530 record_line_ftype p_record_line
)
20532 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20534 if (dwarf_line_debug
)
20536 fprintf_unfiltered (gdb_stdlog
,
20537 "Recording line %u, file %s, address %s\n",
20538 line
, lbasename (subfile
->name
),
20539 paddress (gdbarch
, address
));
20542 (*p_record_line
) (subfile
, line
, addr
);
20545 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20546 Mark the end of a set of line number records.
20547 The arguments are the same as for dwarf_record_line_1.
20548 If SUBFILE is NULL the request is ignored. */
20551 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20552 CORE_ADDR address
, record_line_ftype p_record_line
)
20554 if (subfile
== NULL
)
20557 if (dwarf_line_debug
)
20559 fprintf_unfiltered (gdb_stdlog
,
20560 "Finishing current line, file %s, address %s\n",
20561 lbasename (subfile
->name
),
20562 paddress (gdbarch
, address
));
20565 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
20569 lnp_state_machine::record_line (bool end_sequence
)
20571 if (dwarf_line_debug
)
20573 fprintf_unfiltered (gdb_stdlog
,
20574 "Processing actual line %u: file %u,"
20575 " address %s, is_stmt %u, discrim %u\n",
20576 m_line
, to_underlying (m_file
),
20577 paddress (m_gdbarch
, m_address
),
20578 m_is_stmt
, m_discriminator
);
20581 file_entry
*fe
= current_file ();
20584 dwarf2_debug_line_missing_file_complaint ();
20585 /* For now we ignore lines not starting on an instruction boundary.
20586 But not when processing end_sequence for compatibility with the
20587 previous version of the code. */
20588 else if (m_op_index
== 0 || end_sequence
)
20590 fe
->included_p
= 1;
20591 if (m_record_lines_p
&& m_is_stmt
)
20593 if (m_last_subfile
!= current_subfile
|| end_sequence
)
20595 dwarf_finish_line (m_gdbarch
, m_last_subfile
,
20596 m_address
, m_record_line_callback
);
20601 if (dwarf_record_line_p (m_line
, m_last_line
,
20602 m_line_has_non_zero_discriminator
,
20605 dwarf_record_line_1 (m_gdbarch
, current_subfile
,
20607 m_record_line_callback
);
20609 m_last_subfile
= current_subfile
;
20610 m_last_line
= m_line
;
20616 lnp_state_machine::lnp_state_machine (gdbarch
*arch
, line_header
*lh
,
20617 bool record_lines_p
)
20620 m_record_lines_p
= record_lines_p
;
20621 m_line_header
= lh
;
20623 m_record_line_callback
= ::record_line
;
20625 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20626 was a line entry for it so that the backend has a chance to adjust it
20627 and also record it in case it needs it. This is currently used by MIPS
20628 code, cf. `mips_adjust_dwarf2_line'. */
20629 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20630 m_is_stmt
= lh
->default_is_stmt
;
20631 m_discriminator
= 0;
20635 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20636 const gdb_byte
*line_ptr
,
20637 CORE_ADDR lowpc
, CORE_ADDR address
)
20639 /* If address < lowpc then it's not a usable value, it's outside the
20640 pc range of the CU. However, we restrict the test to only address
20641 values of zero to preserve GDB's previous behaviour which is to
20642 handle the specific case of a function being GC'd by the linker. */
20644 if (address
== 0 && address
< lowpc
)
20646 /* This line table is for a function which has been
20647 GCd by the linker. Ignore it. PR gdb/12528 */
20649 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20650 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20652 complaint (&symfile_complaints
,
20653 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20654 line_offset
, objfile_name (objfile
));
20655 m_record_line_callback
= noop_record_line
;
20656 /* Note: record_line_callback is left as noop_record_line until
20657 we see DW_LNE_end_sequence. */
20661 /* Subroutine of dwarf_decode_lines to simplify it.
20662 Process the line number information in LH.
20663 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20664 program in order to set included_p for every referenced header. */
20667 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20668 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20670 const gdb_byte
*line_ptr
, *extended_end
;
20671 const gdb_byte
*line_end
;
20672 unsigned int bytes_read
, extended_len
;
20673 unsigned char op_code
, extended_op
;
20674 CORE_ADDR baseaddr
;
20675 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20676 bfd
*abfd
= objfile
->obfd
;
20677 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
20678 /* True if we're recording line info (as opposed to building partial
20679 symtabs and just interested in finding include files mentioned by
20680 the line number program). */
20681 bool record_lines_p
= !decode_for_pst_p
;
20683 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
20685 line_ptr
= lh
->statement_program_start
;
20686 line_end
= lh
->statement_program_end
;
20688 /* Read the statement sequences until there's nothing left. */
20689 while (line_ptr
< line_end
)
20691 /* The DWARF line number program state machine. Reset the state
20692 machine at the start of each sequence. */
20693 lnp_state_machine
state_machine (gdbarch
, lh
, record_lines_p
);
20694 bool end_sequence
= false;
20696 if (record_lines_p
)
20698 /* Start a subfile for the current file of the state
20700 const file_entry
*fe
= state_machine
.current_file ();
20703 dwarf2_start_subfile (fe
->name
, fe
->include_dir (lh
));
20706 /* Decode the table. */
20707 while (line_ptr
< line_end
&& !end_sequence
)
20709 op_code
= read_1_byte (abfd
, line_ptr
);
20712 if (op_code
>= lh
->opcode_base
)
20714 /* Special opcode. */
20715 state_machine
.handle_special_opcode (op_code
);
20717 else switch (op_code
)
20719 case DW_LNS_extended_op
:
20720 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
20722 line_ptr
+= bytes_read
;
20723 extended_end
= line_ptr
+ extended_len
;
20724 extended_op
= read_1_byte (abfd
, line_ptr
);
20726 switch (extended_op
)
20728 case DW_LNE_end_sequence
:
20729 state_machine
.handle_end_sequence ();
20730 end_sequence
= true;
20732 case DW_LNE_set_address
:
20735 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
20736 line_ptr
+= bytes_read
;
20738 state_machine
.check_line_address (cu
, line_ptr
,
20740 state_machine
.handle_set_address (baseaddr
, address
);
20743 case DW_LNE_define_file
:
20745 const char *cur_file
;
20746 unsigned int mod_time
, length
;
20749 cur_file
= read_direct_string (abfd
, line_ptr
,
20751 line_ptr
+= bytes_read
;
20752 dindex
= (dir_index
)
20753 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20754 line_ptr
+= bytes_read
;
20756 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20757 line_ptr
+= bytes_read
;
20759 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20760 line_ptr
+= bytes_read
;
20761 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
20764 case DW_LNE_set_discriminator
:
20766 /* The discriminator is not interesting to the
20767 debugger; just ignore it. We still need to
20768 check its value though:
20769 if there are consecutive entries for the same
20770 (non-prologue) line we want to coalesce them.
20773 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20774 line_ptr
+= bytes_read
;
20776 state_machine
.handle_set_discriminator (discr
);
20780 complaint (&symfile_complaints
,
20781 _("mangled .debug_line section"));
20784 /* Make sure that we parsed the extended op correctly. If e.g.
20785 we expected a different address size than the producer used,
20786 we may have read the wrong number of bytes. */
20787 if (line_ptr
!= extended_end
)
20789 complaint (&symfile_complaints
,
20790 _("mangled .debug_line section"));
20795 state_machine
.handle_copy ();
20797 case DW_LNS_advance_pc
:
20800 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20801 line_ptr
+= bytes_read
;
20803 state_machine
.handle_advance_pc (adjust
);
20806 case DW_LNS_advance_line
:
20809 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
20810 line_ptr
+= bytes_read
;
20812 state_machine
.handle_advance_line (line_delta
);
20815 case DW_LNS_set_file
:
20817 file_name_index file
20818 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
20820 line_ptr
+= bytes_read
;
20822 state_machine
.handle_set_file (file
);
20825 case DW_LNS_set_column
:
20826 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20827 line_ptr
+= bytes_read
;
20829 case DW_LNS_negate_stmt
:
20830 state_machine
.handle_negate_stmt ();
20832 case DW_LNS_set_basic_block
:
20834 /* Add to the address register of the state machine the
20835 address increment value corresponding to special opcode
20836 255. I.e., this value is scaled by the minimum
20837 instruction length since special opcode 255 would have
20838 scaled the increment. */
20839 case DW_LNS_const_add_pc
:
20840 state_machine
.handle_const_add_pc ();
20842 case DW_LNS_fixed_advance_pc
:
20844 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
20847 state_machine
.handle_fixed_advance_pc (addr_adj
);
20852 /* Unknown standard opcode, ignore it. */
20855 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
20857 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20858 line_ptr
+= bytes_read
;
20865 dwarf2_debug_line_missing_end_sequence_complaint ();
20867 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
20868 in which case we still finish recording the last line). */
20869 state_machine
.record_line (true);
20873 /* Decode the Line Number Program (LNP) for the given line_header
20874 structure and CU. The actual information extracted and the type
20875 of structures created from the LNP depends on the value of PST.
20877 1. If PST is NULL, then this procedure uses the data from the program
20878 to create all necessary symbol tables, and their linetables.
20880 2. If PST is not NULL, this procedure reads the program to determine
20881 the list of files included by the unit represented by PST, and
20882 builds all the associated partial symbol tables.
20884 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20885 It is used for relative paths in the line table.
20886 NOTE: When processing partial symtabs (pst != NULL),
20887 comp_dir == pst->dirname.
20889 NOTE: It is important that psymtabs have the same file name (via strcmp)
20890 as the corresponding symtab. Since COMP_DIR is not used in the name of the
20891 symtab we don't use it in the name of the psymtabs we create.
20892 E.g. expand_line_sal requires this when finding psymtabs to expand.
20893 A good testcase for this is mb-inline.exp.
20895 LOWPC is the lowest address in CU (or 0 if not known).
20897 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
20898 for its PC<->lines mapping information. Otherwise only the filename
20899 table is read in. */
20902 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
20903 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
20904 CORE_ADDR lowpc
, int decode_mapping
)
20906 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20907 const int decode_for_pst_p
= (pst
!= NULL
);
20909 if (decode_mapping
)
20910 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
20912 if (decode_for_pst_p
)
20916 /* Now that we're done scanning the Line Header Program, we can
20917 create the psymtab of each included file. */
20918 for (file_index
= 0; file_index
< lh
->file_names
.size (); file_index
++)
20919 if (lh
->file_names
[file_index
].included_p
== 1)
20921 gdb::unique_xmalloc_ptr
<char> name_holder
;
20922 const char *include_name
=
20923 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
,
20925 if (include_name
!= NULL
)
20926 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
20931 /* Make sure a symtab is created for every file, even files
20932 which contain only variables (i.e. no code with associated
20934 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
20937 for (i
= 0; i
< lh
->file_names
.size (); i
++)
20939 file_entry
&fe
= lh
->file_names
[i
];
20941 dwarf2_start_subfile (fe
.name
, fe
.include_dir (lh
));
20943 if (current_subfile
->symtab
== NULL
)
20945 current_subfile
->symtab
20946 = allocate_symtab (cust
, current_subfile
->name
);
20948 fe
.symtab
= current_subfile
->symtab
;
20953 /* Start a subfile for DWARF. FILENAME is the name of the file and
20954 DIRNAME the name of the source directory which contains FILENAME
20955 or NULL if not known.
20956 This routine tries to keep line numbers from identical absolute and
20957 relative file names in a common subfile.
20959 Using the `list' example from the GDB testsuite, which resides in
20960 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
20961 of /srcdir/list0.c yields the following debugging information for list0.c:
20963 DW_AT_name: /srcdir/list0.c
20964 DW_AT_comp_dir: /compdir
20965 files.files[0].name: list0.h
20966 files.files[0].dir: /srcdir
20967 files.files[1].name: list0.c
20968 files.files[1].dir: /srcdir
20970 The line number information for list0.c has to end up in a single
20971 subfile, so that `break /srcdir/list0.c:1' works as expected.
20972 start_subfile will ensure that this happens provided that we pass the
20973 concatenation of files.files[1].dir and files.files[1].name as the
20977 dwarf2_start_subfile (const char *filename
, const char *dirname
)
20981 /* In order not to lose the line information directory,
20982 we concatenate it to the filename when it makes sense.
20983 Note that the Dwarf3 standard says (speaking of filenames in line
20984 information): ``The directory index is ignored for file names
20985 that represent full path names''. Thus ignoring dirname in the
20986 `else' branch below isn't an issue. */
20988 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
20990 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
20994 start_subfile (filename
);
21000 /* Start a symtab for DWARF.
21001 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
21003 static struct compunit_symtab
*
21004 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
21005 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
21007 struct compunit_symtab
*cust
21008 = start_symtab (cu
->per_cu
->dwarf2_per_objfile
->objfile
, name
, comp_dir
,
21009 low_pc
, cu
->language
);
21011 record_debugformat ("DWARF 2");
21012 record_producer (cu
->producer
);
21014 /* We assume that we're processing GCC output. */
21015 processing_gcc_compilation
= 2;
21017 cu
->processing_has_namespace_info
= 0;
21023 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
21024 struct dwarf2_cu
*cu
)
21026 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21027 struct comp_unit_head
*cu_header
= &cu
->header
;
21029 /* NOTE drow/2003-01-30: There used to be a comment and some special
21030 code here to turn a symbol with DW_AT_external and a
21031 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
21032 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
21033 with some versions of binutils) where shared libraries could have
21034 relocations against symbols in their debug information - the
21035 minimal symbol would have the right address, but the debug info
21036 would not. It's no longer necessary, because we will explicitly
21037 apply relocations when we read in the debug information now. */
21039 /* A DW_AT_location attribute with no contents indicates that a
21040 variable has been optimized away. */
21041 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
21043 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21047 /* Handle one degenerate form of location expression specially, to
21048 preserve GDB's previous behavior when section offsets are
21049 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
21050 then mark this symbol as LOC_STATIC. */
21052 if (attr_form_is_block (attr
)
21053 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
21054 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
21055 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
21056 && (DW_BLOCK (attr
)->size
21057 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
21059 unsigned int dummy
;
21061 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
21062 SYMBOL_VALUE_ADDRESS (sym
) =
21063 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
21065 SYMBOL_VALUE_ADDRESS (sym
) =
21066 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
21067 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
21068 fixup_symbol_section (sym
, objfile
);
21069 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
21070 SYMBOL_SECTION (sym
));
21074 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
21075 expression evaluator, and use LOC_COMPUTED only when necessary
21076 (i.e. when the value of a register or memory location is
21077 referenced, or a thread-local block, etc.). Then again, it might
21078 not be worthwhile. I'm assuming that it isn't unless performance
21079 or memory numbers show me otherwise. */
21081 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
21083 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
21084 cu
->has_loclist
= 1;
21087 /* Given a pointer to a DWARF information entry, figure out if we need
21088 to make a symbol table entry for it, and if so, create a new entry
21089 and return a pointer to it.
21090 If TYPE is NULL, determine symbol type from the die, otherwise
21091 used the passed type.
21092 If SPACE is not NULL, use it to hold the new symbol. If it is
21093 NULL, allocate a new symbol on the objfile's obstack. */
21095 static struct symbol
*
21096 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
21097 struct symbol
*space
)
21099 struct dwarf2_per_objfile
*dwarf2_per_objfile
21100 = cu
->per_cu
->dwarf2_per_objfile
;
21101 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21102 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21103 struct symbol
*sym
= NULL
;
21105 struct attribute
*attr
= NULL
;
21106 struct attribute
*attr2
= NULL
;
21107 CORE_ADDR baseaddr
;
21108 struct pending
**list_to_add
= NULL
;
21110 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
21112 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21114 name
= dwarf2_name (die
, cu
);
21117 const char *linkagename
;
21118 int suppress_add
= 0;
21123 sym
= allocate_symbol (objfile
);
21124 OBJSTAT (objfile
, n_syms
++);
21126 /* Cache this symbol's name and the name's demangled form (if any). */
21127 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
21128 linkagename
= dwarf2_physname (name
, die
, cu
);
21129 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
21131 /* Fortran does not have mangling standard and the mangling does differ
21132 between gfortran, iFort etc. */
21133 if (cu
->language
== language_fortran
21134 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
21135 symbol_set_demangled_name (&(sym
->ginfo
),
21136 dwarf2_full_name (name
, die
, cu
),
21139 /* Default assumptions.
21140 Use the passed type or decode it from the die. */
21141 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21142 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21144 SYMBOL_TYPE (sym
) = type
;
21146 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
21147 attr
= dwarf2_attr (die
,
21148 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
21152 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
21155 attr
= dwarf2_attr (die
,
21156 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
21160 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
21161 struct file_entry
*fe
;
21163 if (cu
->line_header
!= NULL
)
21164 fe
= cu
->line_header
->file_name_at (file_index
);
21169 complaint (&symfile_complaints
,
21170 _("file index out of range"));
21172 symbol_set_symtab (sym
, fe
->symtab
);
21178 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
21183 addr
= attr_value_as_address (attr
);
21184 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
21185 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
21187 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
21188 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
21189 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
21190 add_symbol_to_list (sym
, cu
->list_in_scope
);
21192 case DW_TAG_subprogram
:
21193 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21195 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21196 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21197 if ((attr2
&& (DW_UNSND (attr2
) != 0))
21198 || cu
->language
== language_ada
)
21200 /* Subprograms marked external are stored as a global symbol.
21201 Ada subprograms, whether marked external or not, are always
21202 stored as a global symbol, because we want to be able to
21203 access them globally. For instance, we want to be able
21204 to break on a nested subprogram without having to
21205 specify the context. */
21206 list_to_add
= &global_symbols
;
21210 list_to_add
= cu
->list_in_scope
;
21213 case DW_TAG_inlined_subroutine
:
21214 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21216 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21217 SYMBOL_INLINED (sym
) = 1;
21218 list_to_add
= cu
->list_in_scope
;
21220 case DW_TAG_template_value_param
:
21222 /* Fall through. */
21223 case DW_TAG_constant
:
21224 case DW_TAG_variable
:
21225 case DW_TAG_member
:
21226 /* Compilation with minimal debug info may result in
21227 variables with missing type entries. Change the
21228 misleading `void' type to something sensible. */
21229 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
21230 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
21232 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21233 /* In the case of DW_TAG_member, we should only be called for
21234 static const members. */
21235 if (die
->tag
== DW_TAG_member
)
21237 /* dwarf2_add_field uses die_is_declaration,
21238 so we do the same. */
21239 gdb_assert (die_is_declaration (die
, cu
));
21244 dwarf2_const_value (attr
, sym
, cu
);
21245 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21248 if (attr2
&& (DW_UNSND (attr2
) != 0))
21249 list_to_add
= &global_symbols
;
21251 list_to_add
= cu
->list_in_scope
;
21255 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21258 var_decode_location (attr
, sym
, cu
);
21259 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21261 /* Fortran explicitly imports any global symbols to the local
21262 scope by DW_TAG_common_block. */
21263 if (cu
->language
== language_fortran
&& die
->parent
21264 && die
->parent
->tag
== DW_TAG_common_block
)
21267 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21268 && SYMBOL_VALUE_ADDRESS (sym
) == 0
21269 && !dwarf2_per_objfile
->has_section_at_zero
)
21271 /* When a static variable is eliminated by the linker,
21272 the corresponding debug information is not stripped
21273 out, but the variable address is set to null;
21274 do not add such variables into symbol table. */
21276 else if (attr2
&& (DW_UNSND (attr2
) != 0))
21278 /* Workaround gfortran PR debug/40040 - it uses
21279 DW_AT_location for variables in -fPIC libraries which may
21280 get overriden by other libraries/executable and get
21281 a different address. Resolve it by the minimal symbol
21282 which may come from inferior's executable using copy
21283 relocation. Make this workaround only for gfortran as for
21284 other compilers GDB cannot guess the minimal symbol
21285 Fortran mangling kind. */
21286 if (cu
->language
== language_fortran
&& die
->parent
21287 && die
->parent
->tag
== DW_TAG_module
21289 && startswith (cu
->producer
, "GNU Fortran"))
21290 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21292 /* A variable with DW_AT_external is never static,
21293 but it may be block-scoped. */
21294 list_to_add
= (cu
->list_in_scope
== &file_symbols
21295 ? &global_symbols
: cu
->list_in_scope
);
21298 list_to_add
= cu
->list_in_scope
;
21302 /* We do not know the address of this symbol.
21303 If it is an external symbol and we have type information
21304 for it, enter the symbol as a LOC_UNRESOLVED symbol.
21305 The address of the variable will then be determined from
21306 the minimal symbol table whenever the variable is
21308 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21310 /* Fortran explicitly imports any global symbols to the local
21311 scope by DW_TAG_common_block. */
21312 if (cu
->language
== language_fortran
&& die
->parent
21313 && die
->parent
->tag
== DW_TAG_common_block
)
21315 /* SYMBOL_CLASS doesn't matter here because
21316 read_common_block is going to reset it. */
21318 list_to_add
= cu
->list_in_scope
;
21320 else if (attr2
&& (DW_UNSND (attr2
) != 0)
21321 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
21323 /* A variable with DW_AT_external is never static, but it
21324 may be block-scoped. */
21325 list_to_add
= (cu
->list_in_scope
== &file_symbols
21326 ? &global_symbols
: cu
->list_in_scope
);
21328 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21330 else if (!die_is_declaration (die
, cu
))
21332 /* Use the default LOC_OPTIMIZED_OUT class. */
21333 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
21335 list_to_add
= cu
->list_in_scope
;
21339 case DW_TAG_formal_parameter
:
21340 /* If we are inside a function, mark this as an argument. If
21341 not, we might be looking at an argument to an inlined function
21342 when we do not have enough information to show inlined frames;
21343 pretend it's a local variable in that case so that the user can
21345 if (context_stack_depth
> 0
21346 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
21347 SYMBOL_IS_ARGUMENT (sym
) = 1;
21348 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21351 var_decode_location (attr
, sym
, cu
);
21353 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21356 dwarf2_const_value (attr
, sym
, cu
);
21359 list_to_add
= cu
->list_in_scope
;
21361 case DW_TAG_unspecified_parameters
:
21362 /* From varargs functions; gdb doesn't seem to have any
21363 interest in this information, so just ignore it for now.
21366 case DW_TAG_template_type_param
:
21368 /* Fall through. */
21369 case DW_TAG_class_type
:
21370 case DW_TAG_interface_type
:
21371 case DW_TAG_structure_type
:
21372 case DW_TAG_union_type
:
21373 case DW_TAG_set_type
:
21374 case DW_TAG_enumeration_type
:
21375 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21376 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
21379 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
21380 really ever be static objects: otherwise, if you try
21381 to, say, break of a class's method and you're in a file
21382 which doesn't mention that class, it won't work unless
21383 the check for all static symbols in lookup_symbol_aux
21384 saves you. See the OtherFileClass tests in
21385 gdb.c++/namespace.exp. */
21389 list_to_add
= (cu
->list_in_scope
== &file_symbols
21390 && cu
->language
== language_cplus
21391 ? &global_symbols
: cu
->list_in_scope
);
21393 /* The semantics of C++ state that "struct foo {
21394 ... }" also defines a typedef for "foo". */
21395 if (cu
->language
== language_cplus
21396 || cu
->language
== language_ada
21397 || cu
->language
== language_d
21398 || cu
->language
== language_rust
)
21400 /* The symbol's name is already allocated along
21401 with this objfile, so we don't need to
21402 duplicate it for the type. */
21403 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
21404 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
21409 case DW_TAG_typedef
:
21410 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21411 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21412 list_to_add
= cu
->list_in_scope
;
21414 case DW_TAG_base_type
:
21415 case DW_TAG_subrange_type
:
21416 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21417 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21418 list_to_add
= cu
->list_in_scope
;
21420 case DW_TAG_enumerator
:
21421 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21424 dwarf2_const_value (attr
, sym
, cu
);
21427 /* NOTE: carlton/2003-11-10: See comment above in the
21428 DW_TAG_class_type, etc. block. */
21430 list_to_add
= (cu
->list_in_scope
== &file_symbols
21431 && cu
->language
== language_cplus
21432 ? &global_symbols
: cu
->list_in_scope
);
21435 case DW_TAG_imported_declaration
:
21436 case DW_TAG_namespace
:
21437 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21438 list_to_add
= &global_symbols
;
21440 case DW_TAG_module
:
21441 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21442 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
21443 list_to_add
= &global_symbols
;
21445 case DW_TAG_common_block
:
21446 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
21447 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
21448 add_symbol_to_list (sym
, cu
->list_in_scope
);
21451 /* Not a tag we recognize. Hopefully we aren't processing
21452 trash data, but since we must specifically ignore things
21453 we don't recognize, there is nothing else we should do at
21455 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
21456 dwarf_tag_name (die
->tag
));
21462 sym
->hash_next
= objfile
->template_symbols
;
21463 objfile
->template_symbols
= sym
;
21464 list_to_add
= NULL
;
21467 if (list_to_add
!= NULL
)
21468 add_symbol_to_list (sym
, list_to_add
);
21470 /* For the benefit of old versions of GCC, check for anonymous
21471 namespaces based on the demangled name. */
21472 if (!cu
->processing_has_namespace_info
21473 && cu
->language
== language_cplus
)
21474 cp_scan_for_anonymous_namespaces (sym
, objfile
);
21479 /* Given an attr with a DW_FORM_dataN value in host byte order,
21480 zero-extend it as appropriate for the symbol's type. The DWARF
21481 standard (v4) is not entirely clear about the meaning of using
21482 DW_FORM_dataN for a constant with a signed type, where the type is
21483 wider than the data. The conclusion of a discussion on the DWARF
21484 list was that this is unspecified. We choose to always zero-extend
21485 because that is the interpretation long in use by GCC. */
21488 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21489 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21491 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21492 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21493 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21494 LONGEST l
= DW_UNSND (attr
);
21496 if (bits
< sizeof (*value
) * 8)
21498 l
&= ((LONGEST
) 1 << bits
) - 1;
21501 else if (bits
== sizeof (*value
) * 8)
21505 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21506 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21513 /* Read a constant value from an attribute. Either set *VALUE, or if
21514 the value does not fit in *VALUE, set *BYTES - either already
21515 allocated on the objfile obstack, or newly allocated on OBSTACK,
21516 or, set *BATON, if we translated the constant to a location
21520 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21521 const char *name
, struct obstack
*obstack
,
21522 struct dwarf2_cu
*cu
,
21523 LONGEST
*value
, const gdb_byte
**bytes
,
21524 struct dwarf2_locexpr_baton
**baton
)
21526 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21527 struct comp_unit_head
*cu_header
= &cu
->header
;
21528 struct dwarf_block
*blk
;
21529 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21530 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21536 switch (attr
->form
)
21539 case DW_FORM_GNU_addr_index
:
21543 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21544 dwarf2_const_value_length_mismatch_complaint (name
,
21545 cu_header
->addr_size
,
21546 TYPE_LENGTH (type
));
21547 /* Symbols of this form are reasonably rare, so we just
21548 piggyback on the existing location code rather than writing
21549 a new implementation of symbol_computed_ops. */
21550 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21551 (*baton
)->per_cu
= cu
->per_cu
;
21552 gdb_assert ((*baton
)->per_cu
);
21554 (*baton
)->size
= 2 + cu_header
->addr_size
;
21555 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21556 (*baton
)->data
= data
;
21558 data
[0] = DW_OP_addr
;
21559 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21560 byte_order
, DW_ADDR (attr
));
21561 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21564 case DW_FORM_string
:
21566 case DW_FORM_GNU_str_index
:
21567 case DW_FORM_GNU_strp_alt
:
21568 /* DW_STRING is already allocated on the objfile obstack, point
21570 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21572 case DW_FORM_block1
:
21573 case DW_FORM_block2
:
21574 case DW_FORM_block4
:
21575 case DW_FORM_block
:
21576 case DW_FORM_exprloc
:
21577 case DW_FORM_data16
:
21578 blk
= DW_BLOCK (attr
);
21579 if (TYPE_LENGTH (type
) != blk
->size
)
21580 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21581 TYPE_LENGTH (type
));
21582 *bytes
= blk
->data
;
21585 /* The DW_AT_const_value attributes are supposed to carry the
21586 symbol's value "represented as it would be on the target
21587 architecture." By the time we get here, it's already been
21588 converted to host endianness, so we just need to sign- or
21589 zero-extend it as appropriate. */
21590 case DW_FORM_data1
:
21591 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21593 case DW_FORM_data2
:
21594 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21596 case DW_FORM_data4
:
21597 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21599 case DW_FORM_data8
:
21600 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21603 case DW_FORM_sdata
:
21604 case DW_FORM_implicit_const
:
21605 *value
= DW_SND (attr
);
21608 case DW_FORM_udata
:
21609 *value
= DW_UNSND (attr
);
21613 complaint (&symfile_complaints
,
21614 _("unsupported const value attribute form: '%s'"),
21615 dwarf_form_name (attr
->form
));
21622 /* Copy constant value from an attribute to a symbol. */
21625 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21626 struct dwarf2_cu
*cu
)
21628 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21630 const gdb_byte
*bytes
;
21631 struct dwarf2_locexpr_baton
*baton
;
21633 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21634 SYMBOL_PRINT_NAME (sym
),
21635 &objfile
->objfile_obstack
, cu
,
21636 &value
, &bytes
, &baton
);
21640 SYMBOL_LOCATION_BATON (sym
) = baton
;
21641 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21643 else if (bytes
!= NULL
)
21645 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21646 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21650 SYMBOL_VALUE (sym
) = value
;
21651 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21655 /* Return the type of the die in question using its DW_AT_type attribute. */
21657 static struct type
*
21658 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21660 struct attribute
*type_attr
;
21662 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21665 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21666 /* A missing DW_AT_type represents a void type. */
21667 return objfile_type (objfile
)->builtin_void
;
21670 return lookup_die_type (die
, type_attr
, cu
);
21673 /* True iff CU's producer generates GNAT Ada auxiliary information
21674 that allows to find parallel types through that information instead
21675 of having to do expensive parallel lookups by type name. */
21678 need_gnat_info (struct dwarf2_cu
*cu
)
21680 /* Assume that the Ada compiler was GNAT, which always produces
21681 the auxiliary information. */
21682 return (cu
->language
== language_ada
);
21685 /* Return the auxiliary type of the die in question using its
21686 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
21687 attribute is not present. */
21689 static struct type
*
21690 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21692 struct attribute
*type_attr
;
21694 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
21698 return lookup_die_type (die
, type_attr
, cu
);
21701 /* If DIE has a descriptive_type attribute, then set the TYPE's
21702 descriptive type accordingly. */
21705 set_descriptive_type (struct type
*type
, struct die_info
*die
,
21706 struct dwarf2_cu
*cu
)
21708 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
21710 if (descriptive_type
)
21712 ALLOCATE_GNAT_AUX_TYPE (type
);
21713 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
21717 /* Return the containing type of the die in question using its
21718 DW_AT_containing_type attribute. */
21720 static struct type
*
21721 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21723 struct attribute
*type_attr
;
21724 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21726 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
21728 error (_("Dwarf Error: Problem turning containing type into gdb type "
21729 "[in module %s]"), objfile_name (objfile
));
21731 return lookup_die_type (die
, type_attr
, cu
);
21734 /* Return an error marker type to use for the ill formed type in DIE/CU. */
21736 static struct type
*
21737 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
21739 struct dwarf2_per_objfile
*dwarf2_per_objfile
21740 = cu
->per_cu
->dwarf2_per_objfile
;
21741 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21742 char *message
, *saved
;
21744 message
= xstrprintf (_("<unknown type in %s, CU %s, DIE %s>"),
21745 objfile_name (objfile
),
21746 sect_offset_str (cu
->header
.sect_off
),
21747 sect_offset_str (die
->sect_off
));
21748 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
21749 message
, strlen (message
));
21752 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
21755 /* Look up the type of DIE in CU using its type attribute ATTR.
21756 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
21757 DW_AT_containing_type.
21758 If there is no type substitute an error marker. */
21760 static struct type
*
21761 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
21762 struct dwarf2_cu
*cu
)
21764 struct dwarf2_per_objfile
*dwarf2_per_objfile
21765 = cu
->per_cu
->dwarf2_per_objfile
;
21766 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21767 struct type
*this_type
;
21769 gdb_assert (attr
->name
== DW_AT_type
21770 || attr
->name
== DW_AT_GNAT_descriptive_type
21771 || attr
->name
== DW_AT_containing_type
);
21773 /* First see if we have it cached. */
21775 if (attr
->form
== DW_FORM_GNU_ref_alt
)
21777 struct dwarf2_per_cu_data
*per_cu
;
21778 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21780 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
21781 dwarf2_per_objfile
);
21782 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
21784 else if (attr_form_is_ref (attr
))
21786 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21788 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
21790 else if (attr
->form
== DW_FORM_ref_sig8
)
21792 ULONGEST signature
= DW_SIGNATURE (attr
);
21794 return get_signatured_type (die
, signature
, cu
);
21798 complaint (&symfile_complaints
,
21799 _("Dwarf Error: Bad type attribute %s in DIE"
21800 " at %s [in module %s]"),
21801 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
21802 objfile_name (objfile
));
21803 return build_error_marker_type (cu
, die
);
21806 /* If not cached we need to read it in. */
21808 if (this_type
== NULL
)
21810 struct die_info
*type_die
= NULL
;
21811 struct dwarf2_cu
*type_cu
= cu
;
21813 if (attr_form_is_ref (attr
))
21814 type_die
= follow_die_ref (die
, attr
, &type_cu
);
21815 if (type_die
== NULL
)
21816 return build_error_marker_type (cu
, die
);
21817 /* If we find the type now, it's probably because the type came
21818 from an inter-CU reference and the type's CU got expanded before
21820 this_type
= read_type_die (type_die
, type_cu
);
21823 /* If we still don't have a type use an error marker. */
21825 if (this_type
== NULL
)
21826 return build_error_marker_type (cu
, die
);
21831 /* Return the type in DIE, CU.
21832 Returns NULL for invalid types.
21834 This first does a lookup in die_type_hash,
21835 and only reads the die in if necessary.
21837 NOTE: This can be called when reading in partial or full symbols. */
21839 static struct type
*
21840 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
21842 struct type
*this_type
;
21844 this_type
= get_die_type (die
, cu
);
21848 return read_type_die_1 (die
, cu
);
21851 /* Read the type in DIE, CU.
21852 Returns NULL for invalid types. */
21854 static struct type
*
21855 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
21857 struct type
*this_type
= NULL
;
21861 case DW_TAG_class_type
:
21862 case DW_TAG_interface_type
:
21863 case DW_TAG_structure_type
:
21864 case DW_TAG_union_type
:
21865 this_type
= read_structure_type (die
, cu
);
21867 case DW_TAG_enumeration_type
:
21868 this_type
= read_enumeration_type (die
, cu
);
21870 case DW_TAG_subprogram
:
21871 case DW_TAG_subroutine_type
:
21872 case DW_TAG_inlined_subroutine
:
21873 this_type
= read_subroutine_type (die
, cu
);
21875 case DW_TAG_array_type
:
21876 this_type
= read_array_type (die
, cu
);
21878 case DW_TAG_set_type
:
21879 this_type
= read_set_type (die
, cu
);
21881 case DW_TAG_pointer_type
:
21882 this_type
= read_tag_pointer_type (die
, cu
);
21884 case DW_TAG_ptr_to_member_type
:
21885 this_type
= read_tag_ptr_to_member_type (die
, cu
);
21887 case DW_TAG_reference_type
:
21888 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
21890 case DW_TAG_rvalue_reference_type
:
21891 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
21893 case DW_TAG_const_type
:
21894 this_type
= read_tag_const_type (die
, cu
);
21896 case DW_TAG_volatile_type
:
21897 this_type
= read_tag_volatile_type (die
, cu
);
21899 case DW_TAG_restrict_type
:
21900 this_type
= read_tag_restrict_type (die
, cu
);
21902 case DW_TAG_string_type
:
21903 this_type
= read_tag_string_type (die
, cu
);
21905 case DW_TAG_typedef
:
21906 this_type
= read_typedef (die
, cu
);
21908 case DW_TAG_subrange_type
:
21909 this_type
= read_subrange_type (die
, cu
);
21911 case DW_TAG_base_type
:
21912 this_type
= read_base_type (die
, cu
);
21914 case DW_TAG_unspecified_type
:
21915 this_type
= read_unspecified_type (die
, cu
);
21917 case DW_TAG_namespace
:
21918 this_type
= read_namespace_type (die
, cu
);
21920 case DW_TAG_module
:
21921 this_type
= read_module_type (die
, cu
);
21923 case DW_TAG_atomic_type
:
21924 this_type
= read_tag_atomic_type (die
, cu
);
21927 complaint (&symfile_complaints
,
21928 _("unexpected tag in read_type_die: '%s'"),
21929 dwarf_tag_name (die
->tag
));
21936 /* See if we can figure out if the class lives in a namespace. We do
21937 this by looking for a member function; its demangled name will
21938 contain namespace info, if there is any.
21939 Return the computed name or NULL.
21940 Space for the result is allocated on the objfile's obstack.
21941 This is the full-die version of guess_partial_die_structure_name.
21942 In this case we know DIE has no useful parent. */
21945 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21947 struct die_info
*spec_die
;
21948 struct dwarf2_cu
*spec_cu
;
21949 struct die_info
*child
;
21950 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21953 spec_die
= die_specification (die
, &spec_cu
);
21954 if (spec_die
!= NULL
)
21960 for (child
= die
->child
;
21962 child
= child
->sibling
)
21964 if (child
->tag
== DW_TAG_subprogram
)
21966 const char *linkage_name
= dw2_linkage_name (child
, cu
);
21968 if (linkage_name
!= NULL
)
21971 = language_class_name_from_physname (cu
->language_defn
,
21975 if (actual_name
!= NULL
)
21977 const char *die_name
= dwarf2_name (die
, cu
);
21979 if (die_name
!= NULL
21980 && strcmp (die_name
, actual_name
) != 0)
21982 /* Strip off the class name from the full name.
21983 We want the prefix. */
21984 int die_name_len
= strlen (die_name
);
21985 int actual_name_len
= strlen (actual_name
);
21987 /* Test for '::' as a sanity check. */
21988 if (actual_name_len
> die_name_len
+ 2
21989 && actual_name
[actual_name_len
21990 - die_name_len
- 1] == ':')
21991 name
= (char *) obstack_copy0 (
21992 &objfile
->per_bfd
->storage_obstack
,
21993 actual_name
, actual_name_len
- die_name_len
- 2);
21996 xfree (actual_name
);
22005 /* GCC might emit a nameless typedef that has a linkage name. Determine the
22006 prefix part in such case. See
22007 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22009 static const char *
22010 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22012 struct attribute
*attr
;
22015 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
22016 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
22019 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
22022 attr
= dw2_linkage_name_attr (die
, cu
);
22023 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22026 /* dwarf2_name had to be already called. */
22027 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
22029 /* Strip the base name, keep any leading namespaces/classes. */
22030 base
= strrchr (DW_STRING (attr
), ':');
22031 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
22034 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22035 return (char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22037 &base
[-1] - DW_STRING (attr
));
22040 /* Return the name of the namespace/class that DIE is defined within,
22041 or "" if we can't tell. The caller should not xfree the result.
22043 For example, if we're within the method foo() in the following
22053 then determine_prefix on foo's die will return "N::C". */
22055 static const char *
22056 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22058 struct dwarf2_per_objfile
*dwarf2_per_objfile
22059 = cu
->per_cu
->dwarf2_per_objfile
;
22060 struct die_info
*parent
, *spec_die
;
22061 struct dwarf2_cu
*spec_cu
;
22062 struct type
*parent_type
;
22063 const char *retval
;
22065 if (cu
->language
!= language_cplus
22066 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
22067 && cu
->language
!= language_rust
)
22070 retval
= anonymous_struct_prefix (die
, cu
);
22074 /* We have to be careful in the presence of DW_AT_specification.
22075 For example, with GCC 3.4, given the code
22079 // Definition of N::foo.
22083 then we'll have a tree of DIEs like this:
22085 1: DW_TAG_compile_unit
22086 2: DW_TAG_namespace // N
22087 3: DW_TAG_subprogram // declaration of N::foo
22088 4: DW_TAG_subprogram // definition of N::foo
22089 DW_AT_specification // refers to die #3
22091 Thus, when processing die #4, we have to pretend that we're in
22092 the context of its DW_AT_specification, namely the contex of die
22095 spec_die
= die_specification (die
, &spec_cu
);
22096 if (spec_die
== NULL
)
22097 parent
= die
->parent
;
22100 parent
= spec_die
->parent
;
22104 if (parent
== NULL
)
22106 else if (parent
->building_fullname
)
22109 const char *parent_name
;
22111 /* It has been seen on RealView 2.2 built binaries,
22112 DW_TAG_template_type_param types actually _defined_ as
22113 children of the parent class:
22116 template class <class Enum> Class{};
22117 Class<enum E> class_e;
22119 1: DW_TAG_class_type (Class)
22120 2: DW_TAG_enumeration_type (E)
22121 3: DW_TAG_enumerator (enum1:0)
22122 3: DW_TAG_enumerator (enum2:1)
22124 2: DW_TAG_template_type_param
22125 DW_AT_type DW_FORM_ref_udata (E)
22127 Besides being broken debug info, it can put GDB into an
22128 infinite loop. Consider:
22130 When we're building the full name for Class<E>, we'll start
22131 at Class, and go look over its template type parameters,
22132 finding E. We'll then try to build the full name of E, and
22133 reach here. We're now trying to build the full name of E,
22134 and look over the parent DIE for containing scope. In the
22135 broken case, if we followed the parent DIE of E, we'd again
22136 find Class, and once again go look at its template type
22137 arguments, etc., etc. Simply don't consider such parent die
22138 as source-level parent of this die (it can't be, the language
22139 doesn't allow it), and break the loop here. */
22140 name
= dwarf2_name (die
, cu
);
22141 parent_name
= dwarf2_name (parent
, cu
);
22142 complaint (&symfile_complaints
,
22143 _("template param type '%s' defined within parent '%s'"),
22144 name
? name
: "<unknown>",
22145 parent_name
? parent_name
: "<unknown>");
22149 switch (parent
->tag
)
22151 case DW_TAG_namespace
:
22152 parent_type
= read_type_die (parent
, cu
);
22153 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
22154 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
22155 Work around this problem here. */
22156 if (cu
->language
== language_cplus
22157 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
22159 /* We give a name to even anonymous namespaces. */
22160 return TYPE_TAG_NAME (parent_type
);
22161 case DW_TAG_class_type
:
22162 case DW_TAG_interface_type
:
22163 case DW_TAG_structure_type
:
22164 case DW_TAG_union_type
:
22165 case DW_TAG_module
:
22166 parent_type
= read_type_die (parent
, cu
);
22167 if (TYPE_TAG_NAME (parent_type
) != NULL
)
22168 return TYPE_TAG_NAME (parent_type
);
22170 /* An anonymous structure is only allowed non-static data
22171 members; no typedefs, no member functions, et cetera.
22172 So it does not need a prefix. */
22174 case DW_TAG_compile_unit
:
22175 case DW_TAG_partial_unit
:
22176 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
22177 if (cu
->language
== language_cplus
22178 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
22179 && die
->child
!= NULL
22180 && (die
->tag
== DW_TAG_class_type
22181 || die
->tag
== DW_TAG_structure_type
22182 || die
->tag
== DW_TAG_union_type
))
22184 char *name
= guess_full_die_structure_name (die
, cu
);
22189 case DW_TAG_enumeration_type
:
22190 parent_type
= read_type_die (parent
, cu
);
22191 if (TYPE_DECLARED_CLASS (parent_type
))
22193 if (TYPE_TAG_NAME (parent_type
) != NULL
)
22194 return TYPE_TAG_NAME (parent_type
);
22197 /* Fall through. */
22199 return determine_prefix (parent
, cu
);
22203 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
22204 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
22205 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
22206 an obconcat, otherwise allocate storage for the result. The CU argument is
22207 used to determine the language and hence, the appropriate separator. */
22209 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
22212 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
22213 int physname
, struct dwarf2_cu
*cu
)
22215 const char *lead
= "";
22218 if (suffix
== NULL
|| suffix
[0] == '\0'
22219 || prefix
== NULL
|| prefix
[0] == '\0')
22221 else if (cu
->language
== language_d
)
22223 /* For D, the 'main' function could be defined in any module, but it
22224 should never be prefixed. */
22225 if (strcmp (suffix
, "D main") == 0)
22233 else if (cu
->language
== language_fortran
&& physname
)
22235 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
22236 DW_AT_MIPS_linkage_name is preferred and used instead. */
22244 if (prefix
== NULL
)
22246 if (suffix
== NULL
)
22253 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
22255 strcpy (retval
, lead
);
22256 strcat (retval
, prefix
);
22257 strcat (retval
, sep
);
22258 strcat (retval
, suffix
);
22263 /* We have an obstack. */
22264 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
22268 /* Return sibling of die, NULL if no sibling. */
22270 static struct die_info
*
22271 sibling_die (struct die_info
*die
)
22273 return die
->sibling
;
22276 /* Get name of a die, return NULL if not found. */
22278 static const char *
22279 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
22280 struct obstack
*obstack
)
22282 if (name
&& cu
->language
== language_cplus
)
22284 std::string canon_name
= cp_canonicalize_string (name
);
22286 if (!canon_name
.empty ())
22288 if (canon_name
!= name
)
22289 name
= (const char *) obstack_copy0 (obstack
,
22290 canon_name
.c_str (),
22291 canon_name
.length ());
22298 /* Get name of a die, return NULL if not found.
22299 Anonymous namespaces are converted to their magic string. */
22301 static const char *
22302 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22304 struct attribute
*attr
;
22305 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22307 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
22308 if ((!attr
|| !DW_STRING (attr
))
22309 && die
->tag
!= DW_TAG_namespace
22310 && die
->tag
!= DW_TAG_class_type
22311 && die
->tag
!= DW_TAG_interface_type
22312 && die
->tag
!= DW_TAG_structure_type
22313 && die
->tag
!= DW_TAG_union_type
)
22318 case DW_TAG_compile_unit
:
22319 case DW_TAG_partial_unit
:
22320 /* Compilation units have a DW_AT_name that is a filename, not
22321 a source language identifier. */
22322 case DW_TAG_enumeration_type
:
22323 case DW_TAG_enumerator
:
22324 /* These tags always have simple identifiers already; no need
22325 to canonicalize them. */
22326 return DW_STRING (attr
);
22328 case DW_TAG_namespace
:
22329 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
22330 return DW_STRING (attr
);
22331 return CP_ANONYMOUS_NAMESPACE_STR
;
22333 case DW_TAG_class_type
:
22334 case DW_TAG_interface_type
:
22335 case DW_TAG_structure_type
:
22336 case DW_TAG_union_type
:
22337 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
22338 structures or unions. These were of the form "._%d" in GCC 4.1,
22339 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
22340 and GCC 4.4. We work around this problem by ignoring these. */
22341 if (attr
&& DW_STRING (attr
)
22342 && (startswith (DW_STRING (attr
), "._")
22343 || startswith (DW_STRING (attr
), "<anonymous")))
22346 /* GCC might emit a nameless typedef that has a linkage name. See
22347 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22348 if (!attr
|| DW_STRING (attr
) == NULL
)
22350 char *demangled
= NULL
;
22352 attr
= dw2_linkage_name_attr (die
, cu
);
22353 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22356 /* Avoid demangling DW_STRING (attr) the second time on a second
22357 call for the same DIE. */
22358 if (!DW_STRING_IS_CANONICAL (attr
))
22359 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
22365 /* FIXME: we already did this for the partial symbol... */
22368 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22369 demangled
, strlen (demangled
)));
22370 DW_STRING_IS_CANONICAL (attr
) = 1;
22373 /* Strip any leading namespaces/classes, keep only the base name.
22374 DW_AT_name for named DIEs does not contain the prefixes. */
22375 base
= strrchr (DW_STRING (attr
), ':');
22376 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
22379 return DW_STRING (attr
);
22388 if (!DW_STRING_IS_CANONICAL (attr
))
22391 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
22392 &objfile
->per_bfd
->storage_obstack
);
22393 DW_STRING_IS_CANONICAL (attr
) = 1;
22395 return DW_STRING (attr
);
22398 /* Return the die that this die in an extension of, or NULL if there
22399 is none. *EXT_CU is the CU containing DIE on input, and the CU
22400 containing the return value on output. */
22402 static struct die_info
*
22403 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
22405 struct attribute
*attr
;
22407 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
22411 return follow_die_ref (die
, attr
, ext_cu
);
22414 /* Convert a DIE tag into its string name. */
22416 static const char *
22417 dwarf_tag_name (unsigned tag
)
22419 const char *name
= get_DW_TAG_name (tag
);
22422 return "DW_TAG_<unknown>";
22427 /* Convert a DWARF attribute code into its string name. */
22429 static const char *
22430 dwarf_attr_name (unsigned attr
)
22434 #ifdef MIPS /* collides with DW_AT_HP_block_index */
22435 if (attr
== DW_AT_MIPS_fde
)
22436 return "DW_AT_MIPS_fde";
22438 if (attr
== DW_AT_HP_block_index
)
22439 return "DW_AT_HP_block_index";
22442 name
= get_DW_AT_name (attr
);
22445 return "DW_AT_<unknown>";
22450 /* Convert a DWARF value form code into its string name. */
22452 static const char *
22453 dwarf_form_name (unsigned form
)
22455 const char *name
= get_DW_FORM_name (form
);
22458 return "DW_FORM_<unknown>";
22463 static const char *
22464 dwarf_bool_name (unsigned mybool
)
22472 /* Convert a DWARF type code into its string name. */
22474 static const char *
22475 dwarf_type_encoding_name (unsigned enc
)
22477 const char *name
= get_DW_ATE_name (enc
);
22480 return "DW_ATE_<unknown>";
22486 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
22490 print_spaces (indent
, f
);
22491 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
22492 dwarf_tag_name (die
->tag
), die
->abbrev
,
22493 sect_offset_str (die
->sect_off
));
22495 if (die
->parent
!= NULL
)
22497 print_spaces (indent
, f
);
22498 fprintf_unfiltered (f
, " parent at offset: %s\n",
22499 sect_offset_str (die
->parent
->sect_off
));
22502 print_spaces (indent
, f
);
22503 fprintf_unfiltered (f
, " has children: %s\n",
22504 dwarf_bool_name (die
->child
!= NULL
));
22506 print_spaces (indent
, f
);
22507 fprintf_unfiltered (f
, " attributes:\n");
22509 for (i
= 0; i
< die
->num_attrs
; ++i
)
22511 print_spaces (indent
, f
);
22512 fprintf_unfiltered (f
, " %s (%s) ",
22513 dwarf_attr_name (die
->attrs
[i
].name
),
22514 dwarf_form_name (die
->attrs
[i
].form
));
22516 switch (die
->attrs
[i
].form
)
22519 case DW_FORM_GNU_addr_index
:
22520 fprintf_unfiltered (f
, "address: ");
22521 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
22523 case DW_FORM_block2
:
22524 case DW_FORM_block4
:
22525 case DW_FORM_block
:
22526 case DW_FORM_block1
:
22527 fprintf_unfiltered (f
, "block: size %s",
22528 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22530 case DW_FORM_exprloc
:
22531 fprintf_unfiltered (f
, "expression: size %s",
22532 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22534 case DW_FORM_data16
:
22535 fprintf_unfiltered (f
, "constant of 16 bytes");
22537 case DW_FORM_ref_addr
:
22538 fprintf_unfiltered (f
, "ref address: ");
22539 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22541 case DW_FORM_GNU_ref_alt
:
22542 fprintf_unfiltered (f
, "alt ref address: ");
22543 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22549 case DW_FORM_ref_udata
:
22550 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
22551 (long) (DW_UNSND (&die
->attrs
[i
])));
22553 case DW_FORM_data1
:
22554 case DW_FORM_data2
:
22555 case DW_FORM_data4
:
22556 case DW_FORM_data8
:
22557 case DW_FORM_udata
:
22558 case DW_FORM_sdata
:
22559 fprintf_unfiltered (f
, "constant: %s",
22560 pulongest (DW_UNSND (&die
->attrs
[i
])));
22562 case DW_FORM_sec_offset
:
22563 fprintf_unfiltered (f
, "section offset: %s",
22564 pulongest (DW_UNSND (&die
->attrs
[i
])));
22566 case DW_FORM_ref_sig8
:
22567 fprintf_unfiltered (f
, "signature: %s",
22568 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
22570 case DW_FORM_string
:
22572 case DW_FORM_line_strp
:
22573 case DW_FORM_GNU_str_index
:
22574 case DW_FORM_GNU_strp_alt
:
22575 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22576 DW_STRING (&die
->attrs
[i
])
22577 ? DW_STRING (&die
->attrs
[i
]) : "",
22578 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
22581 if (DW_UNSND (&die
->attrs
[i
]))
22582 fprintf_unfiltered (f
, "flag: TRUE");
22584 fprintf_unfiltered (f
, "flag: FALSE");
22586 case DW_FORM_flag_present
:
22587 fprintf_unfiltered (f
, "flag: TRUE");
22589 case DW_FORM_indirect
:
22590 /* The reader will have reduced the indirect form to
22591 the "base form" so this form should not occur. */
22592 fprintf_unfiltered (f
,
22593 "unexpected attribute form: DW_FORM_indirect");
22595 case DW_FORM_implicit_const
:
22596 fprintf_unfiltered (f
, "constant: %s",
22597 plongest (DW_SND (&die
->attrs
[i
])));
22600 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
22601 die
->attrs
[i
].form
);
22604 fprintf_unfiltered (f
, "\n");
22609 dump_die_for_error (struct die_info
*die
)
22611 dump_die_shallow (gdb_stderr
, 0, die
);
22615 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
22617 int indent
= level
* 4;
22619 gdb_assert (die
!= NULL
);
22621 if (level
>= max_level
)
22624 dump_die_shallow (f
, indent
, die
);
22626 if (die
->child
!= NULL
)
22628 print_spaces (indent
, f
);
22629 fprintf_unfiltered (f
, " Children:");
22630 if (level
+ 1 < max_level
)
22632 fprintf_unfiltered (f
, "\n");
22633 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22637 fprintf_unfiltered (f
,
22638 " [not printed, max nesting level reached]\n");
22642 if (die
->sibling
!= NULL
&& level
> 0)
22644 dump_die_1 (f
, level
, max_level
, die
->sibling
);
22648 /* This is called from the pdie macro in gdbinit.in.
22649 It's not static so gcc will keep a copy callable from gdb. */
22652 dump_die (struct die_info
*die
, int max_level
)
22654 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
22658 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
22662 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
22663 to_underlying (die
->sect_off
),
22669 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
22673 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
22675 if (attr_form_is_ref (attr
))
22676 return (sect_offset
) DW_UNSND (attr
);
22678 complaint (&symfile_complaints
,
22679 _("unsupported die ref attribute form: '%s'"),
22680 dwarf_form_name (attr
->form
));
22684 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
22685 * the value held by the attribute is not constant. */
22688 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
22690 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
22691 return DW_SND (attr
);
22692 else if (attr
->form
== DW_FORM_udata
22693 || attr
->form
== DW_FORM_data1
22694 || attr
->form
== DW_FORM_data2
22695 || attr
->form
== DW_FORM_data4
22696 || attr
->form
== DW_FORM_data8
)
22697 return DW_UNSND (attr
);
22700 /* For DW_FORM_data16 see attr_form_is_constant. */
22701 complaint (&symfile_complaints
,
22702 _("Attribute value is not a constant (%s)"),
22703 dwarf_form_name (attr
->form
));
22704 return default_value
;
22708 /* Follow reference or signature attribute ATTR of SRC_DIE.
22709 On entry *REF_CU is the CU of SRC_DIE.
22710 On exit *REF_CU is the CU of the result. */
22712 static struct die_info
*
22713 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22714 struct dwarf2_cu
**ref_cu
)
22716 struct die_info
*die
;
22718 if (attr_form_is_ref (attr
))
22719 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22720 else if (attr
->form
== DW_FORM_ref_sig8
)
22721 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22724 dump_die_for_error (src_die
);
22725 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22726 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22732 /* Follow reference OFFSET.
22733 On entry *REF_CU is the CU of the source die referencing OFFSET.
22734 On exit *REF_CU is the CU of the result.
22735 Returns NULL if OFFSET is invalid. */
22737 static struct die_info
*
22738 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22739 struct dwarf2_cu
**ref_cu
)
22741 struct die_info temp_die
;
22742 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22743 struct dwarf2_per_objfile
*dwarf2_per_objfile
22744 = cu
->per_cu
->dwarf2_per_objfile
;
22746 gdb_assert (cu
->per_cu
!= NULL
);
22750 if (cu
->per_cu
->is_debug_types
)
22752 /* .debug_types CUs cannot reference anything outside their CU.
22753 If they need to, they have to reference a signatured type via
22754 DW_FORM_ref_sig8. */
22755 if (!offset_in_cu_p (&cu
->header
, sect_off
))
22758 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22759 || !offset_in_cu_p (&cu
->header
, sect_off
))
22761 struct dwarf2_per_cu_data
*per_cu
;
22763 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22764 dwarf2_per_objfile
);
22766 /* If necessary, add it to the queue and load its DIEs. */
22767 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
22768 load_full_comp_unit (per_cu
, cu
->language
);
22770 target_cu
= per_cu
->cu
;
22772 else if (cu
->dies
== NULL
)
22774 /* We're loading full DIEs during partial symbol reading. */
22775 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
22776 load_full_comp_unit (cu
->per_cu
, language_minimal
);
22779 *ref_cu
= target_cu
;
22780 temp_die
.sect_off
= sect_off
;
22781 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22783 to_underlying (sect_off
));
22786 /* Follow reference attribute ATTR of SRC_DIE.
22787 On entry *REF_CU is the CU of SRC_DIE.
22788 On exit *REF_CU is the CU of the result. */
22790 static struct die_info
*
22791 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22792 struct dwarf2_cu
**ref_cu
)
22794 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22795 struct dwarf2_cu
*cu
= *ref_cu
;
22796 struct die_info
*die
;
22798 die
= follow_die_offset (sect_off
,
22799 (attr
->form
== DW_FORM_GNU_ref_alt
22800 || cu
->per_cu
->is_dwz
),
22803 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
22804 "at %s [in module %s]"),
22805 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
22806 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
22811 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
22812 Returned value is intended for DW_OP_call*. Returned
22813 dwarf2_locexpr_baton->data has lifetime of
22814 PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */
22816 struct dwarf2_locexpr_baton
22817 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
22818 struct dwarf2_per_cu_data
*per_cu
,
22819 CORE_ADDR (*get_frame_pc
) (void *baton
),
22822 struct dwarf2_cu
*cu
;
22823 struct die_info
*die
;
22824 struct attribute
*attr
;
22825 struct dwarf2_locexpr_baton retval
;
22826 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
22827 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22829 if (per_cu
->cu
== NULL
)
22834 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22835 Instead just throw an error, not much else we can do. */
22836 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22837 sect_offset_str (sect_off
), objfile_name (objfile
));
22840 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22842 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22843 sect_offset_str (sect_off
), objfile_name (objfile
));
22845 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22848 /* DWARF: "If there is no such attribute, then there is no effect.".
22849 DATA is ignored if SIZE is 0. */
22851 retval
.data
= NULL
;
22854 else if (attr_form_is_section_offset (attr
))
22856 struct dwarf2_loclist_baton loclist_baton
;
22857 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22860 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
22862 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
22864 retval
.size
= size
;
22868 if (!attr_form_is_block (attr
))
22869 error (_("Dwarf Error: DIE at %s referenced in module %s "
22870 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
22871 sect_offset_str (sect_off
), objfile_name (objfile
));
22873 retval
.data
= DW_BLOCK (attr
)->data
;
22874 retval
.size
= DW_BLOCK (attr
)->size
;
22876 retval
.per_cu
= cu
->per_cu
;
22878 age_cached_comp_units (dwarf2_per_objfile
);
22883 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
22886 struct dwarf2_locexpr_baton
22887 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
22888 struct dwarf2_per_cu_data
*per_cu
,
22889 CORE_ADDR (*get_frame_pc
) (void *baton
),
22892 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
22894 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
22897 /* Write a constant of a given type as target-ordered bytes into
22900 static const gdb_byte
*
22901 write_constant_as_bytes (struct obstack
*obstack
,
22902 enum bfd_endian byte_order
,
22909 *len
= TYPE_LENGTH (type
);
22910 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22911 store_unsigned_integer (result
, *len
, byte_order
, value
);
22916 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
22917 pointer to the constant bytes and set LEN to the length of the
22918 data. If memory is needed, allocate it on OBSTACK. If the DIE
22919 does not have a DW_AT_const_value, return NULL. */
22922 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
22923 struct dwarf2_per_cu_data
*per_cu
,
22924 struct obstack
*obstack
,
22927 struct dwarf2_cu
*cu
;
22928 struct die_info
*die
;
22929 struct attribute
*attr
;
22930 const gdb_byte
*result
= NULL
;
22933 enum bfd_endian byte_order
;
22934 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
22936 if (per_cu
->cu
== NULL
)
22941 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22942 Instead just throw an error, not much else we can do. */
22943 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22944 sect_offset_str (sect_off
), objfile_name (objfile
));
22947 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22949 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22950 sect_offset_str (sect_off
), objfile_name (objfile
));
22952 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
22956 byte_order
= (bfd_big_endian (objfile
->obfd
)
22957 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
22959 switch (attr
->form
)
22962 case DW_FORM_GNU_addr_index
:
22966 *len
= cu
->header
.addr_size
;
22967 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22968 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
22972 case DW_FORM_string
:
22974 case DW_FORM_GNU_str_index
:
22975 case DW_FORM_GNU_strp_alt
:
22976 /* DW_STRING is already allocated on the objfile obstack, point
22978 result
= (const gdb_byte
*) DW_STRING (attr
);
22979 *len
= strlen (DW_STRING (attr
));
22981 case DW_FORM_block1
:
22982 case DW_FORM_block2
:
22983 case DW_FORM_block4
:
22984 case DW_FORM_block
:
22985 case DW_FORM_exprloc
:
22986 case DW_FORM_data16
:
22987 result
= DW_BLOCK (attr
)->data
;
22988 *len
= DW_BLOCK (attr
)->size
;
22991 /* The DW_AT_const_value attributes are supposed to carry the
22992 symbol's value "represented as it would be on the target
22993 architecture." By the time we get here, it's already been
22994 converted to host endianness, so we just need to sign- or
22995 zero-extend it as appropriate. */
22996 case DW_FORM_data1
:
22997 type
= die_type (die
, cu
);
22998 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
22999 if (result
== NULL
)
23000 result
= write_constant_as_bytes (obstack
, byte_order
,
23003 case DW_FORM_data2
:
23004 type
= die_type (die
, cu
);
23005 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
23006 if (result
== NULL
)
23007 result
= write_constant_as_bytes (obstack
, byte_order
,
23010 case DW_FORM_data4
:
23011 type
= die_type (die
, cu
);
23012 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
23013 if (result
== NULL
)
23014 result
= write_constant_as_bytes (obstack
, byte_order
,
23017 case DW_FORM_data8
:
23018 type
= die_type (die
, cu
);
23019 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
23020 if (result
== NULL
)
23021 result
= write_constant_as_bytes (obstack
, byte_order
,
23025 case DW_FORM_sdata
:
23026 case DW_FORM_implicit_const
:
23027 type
= die_type (die
, cu
);
23028 result
= write_constant_as_bytes (obstack
, byte_order
,
23029 type
, DW_SND (attr
), len
);
23032 case DW_FORM_udata
:
23033 type
= die_type (die
, cu
);
23034 result
= write_constant_as_bytes (obstack
, byte_order
,
23035 type
, DW_UNSND (attr
), len
);
23039 complaint (&symfile_complaints
,
23040 _("unsupported const value attribute form: '%s'"),
23041 dwarf_form_name (attr
->form
));
23048 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
23049 valid type for this die is found. */
23052 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
23053 struct dwarf2_per_cu_data
*per_cu
)
23055 struct dwarf2_cu
*cu
;
23056 struct die_info
*die
;
23058 if (per_cu
->cu
== NULL
)
23064 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23068 return die_type (die
, cu
);
23071 /* Return the type of the DIE at DIE_OFFSET in the CU named by
23075 dwarf2_get_die_type (cu_offset die_offset
,
23076 struct dwarf2_per_cu_data
*per_cu
)
23078 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
23079 return get_die_type_at_offset (die_offset_sect
, per_cu
);
23082 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
23083 On entry *REF_CU is the CU of SRC_DIE.
23084 On exit *REF_CU is the CU of the result.
23085 Returns NULL if the referenced DIE isn't found. */
23087 static struct die_info
*
23088 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
23089 struct dwarf2_cu
**ref_cu
)
23091 struct die_info temp_die
;
23092 struct dwarf2_cu
*sig_cu
;
23093 struct die_info
*die
;
23095 /* While it might be nice to assert sig_type->type == NULL here,
23096 we can get here for DW_AT_imported_declaration where we need
23097 the DIE not the type. */
23099 /* If necessary, add it to the queue and load its DIEs. */
23101 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
23102 read_signatured_type (sig_type
);
23104 sig_cu
= sig_type
->per_cu
.cu
;
23105 gdb_assert (sig_cu
!= NULL
);
23106 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
23107 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
23108 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
23109 to_underlying (temp_die
.sect_off
));
23112 struct dwarf2_per_objfile
*dwarf2_per_objfile
23113 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
23115 /* For .gdb_index version 7 keep track of included TUs.
23116 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
23117 if (dwarf2_per_objfile
->index_table
!= NULL
23118 && dwarf2_per_objfile
->index_table
->version
<= 7)
23120 VEC_safe_push (dwarf2_per_cu_ptr
,
23121 (*ref_cu
)->per_cu
->imported_symtabs
,
23132 /* Follow signatured type referenced by ATTR in SRC_DIE.
23133 On entry *REF_CU is the CU of SRC_DIE.
23134 On exit *REF_CU is the CU of the result.
23135 The result is the DIE of the type.
23136 If the referenced type cannot be found an error is thrown. */
23138 static struct die_info
*
23139 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23140 struct dwarf2_cu
**ref_cu
)
23142 ULONGEST signature
= DW_SIGNATURE (attr
);
23143 struct signatured_type
*sig_type
;
23144 struct die_info
*die
;
23146 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
23148 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
23149 /* sig_type will be NULL if the signatured type is missing from
23151 if (sig_type
== NULL
)
23153 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23154 " from DIE at %s [in module %s]"),
23155 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23156 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23159 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
23162 dump_die_for_error (src_die
);
23163 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23164 " from DIE at %s [in module %s]"),
23165 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23166 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23172 /* Get the type specified by SIGNATURE referenced in DIE/CU,
23173 reading in and processing the type unit if necessary. */
23175 static struct type
*
23176 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
23177 struct dwarf2_cu
*cu
)
23179 struct dwarf2_per_objfile
*dwarf2_per_objfile
23180 = cu
->per_cu
->dwarf2_per_objfile
;
23181 struct signatured_type
*sig_type
;
23182 struct dwarf2_cu
*type_cu
;
23183 struct die_info
*type_die
;
23186 sig_type
= lookup_signatured_type (cu
, signature
);
23187 /* sig_type will be NULL if the signatured type is missing from
23189 if (sig_type
== NULL
)
23191 complaint (&symfile_complaints
,
23192 _("Dwarf Error: Cannot find signatured DIE %s referenced"
23193 " from DIE at %s [in module %s]"),
23194 hex_string (signature
), sect_offset_str (die
->sect_off
),
23195 objfile_name (dwarf2_per_objfile
->objfile
));
23196 return build_error_marker_type (cu
, die
);
23199 /* If we already know the type we're done. */
23200 if (sig_type
->type
!= NULL
)
23201 return sig_type
->type
;
23204 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
23205 if (type_die
!= NULL
)
23207 /* N.B. We need to call get_die_type to ensure only one type for this DIE
23208 is created. This is important, for example, because for c++ classes
23209 we need TYPE_NAME set which is only done by new_symbol. Blech. */
23210 type
= read_type_die (type_die
, type_cu
);
23213 complaint (&symfile_complaints
,
23214 _("Dwarf Error: Cannot build signatured type %s"
23215 " referenced from DIE at %s [in module %s]"),
23216 hex_string (signature
), sect_offset_str (die
->sect_off
),
23217 objfile_name (dwarf2_per_objfile
->objfile
));
23218 type
= build_error_marker_type (cu
, die
);
23223 complaint (&symfile_complaints
,
23224 _("Dwarf Error: Problem reading signatured DIE %s referenced"
23225 " from DIE at %s [in module %s]"),
23226 hex_string (signature
), sect_offset_str (die
->sect_off
),
23227 objfile_name (dwarf2_per_objfile
->objfile
));
23228 type
= build_error_marker_type (cu
, die
);
23230 sig_type
->type
= type
;
23235 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
23236 reading in and processing the type unit if necessary. */
23238 static struct type
*
23239 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
23240 struct dwarf2_cu
*cu
) /* ARI: editCase function */
23242 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
23243 if (attr_form_is_ref (attr
))
23245 struct dwarf2_cu
*type_cu
= cu
;
23246 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
23248 return read_type_die (type_die
, type_cu
);
23250 else if (attr
->form
== DW_FORM_ref_sig8
)
23252 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
23256 struct dwarf2_per_objfile
*dwarf2_per_objfile
23257 = cu
->per_cu
->dwarf2_per_objfile
;
23259 complaint (&symfile_complaints
,
23260 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
23261 " at %s [in module %s]"),
23262 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
23263 objfile_name (dwarf2_per_objfile
->objfile
));
23264 return build_error_marker_type (cu
, die
);
23268 /* Load the DIEs associated with type unit PER_CU into memory. */
23271 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
23273 struct signatured_type
*sig_type
;
23275 /* Caller is responsible for ensuring type_unit_groups don't get here. */
23276 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
23278 /* We have the per_cu, but we need the signatured_type.
23279 Fortunately this is an easy translation. */
23280 gdb_assert (per_cu
->is_debug_types
);
23281 sig_type
= (struct signatured_type
*) per_cu
;
23283 gdb_assert (per_cu
->cu
== NULL
);
23285 read_signatured_type (sig_type
);
23287 gdb_assert (per_cu
->cu
!= NULL
);
23290 /* die_reader_func for read_signatured_type.
23291 This is identical to load_full_comp_unit_reader,
23292 but is kept separate for now. */
23295 read_signatured_type_reader (const struct die_reader_specs
*reader
,
23296 const gdb_byte
*info_ptr
,
23297 struct die_info
*comp_unit_die
,
23301 struct dwarf2_cu
*cu
= reader
->cu
;
23303 gdb_assert (cu
->die_hash
== NULL
);
23305 htab_create_alloc_ex (cu
->header
.length
/ 12,
23309 &cu
->comp_unit_obstack
,
23310 hashtab_obstack_allocate
,
23311 dummy_obstack_deallocate
);
23314 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
23315 &info_ptr
, comp_unit_die
);
23316 cu
->dies
= comp_unit_die
;
23317 /* comp_unit_die is not stored in die_hash, no need. */
23319 /* We try not to read any attributes in this function, because not
23320 all CUs needed for references have been loaded yet, and symbol
23321 table processing isn't initialized. But we have to set the CU language,
23322 or we won't be able to build types correctly.
23323 Similarly, if we do not read the producer, we can not apply
23324 producer-specific interpretation. */
23325 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
23328 /* Read in a signatured type and build its CU and DIEs.
23329 If the type is a stub for the real type in a DWO file,
23330 read in the real type from the DWO file as well. */
23333 read_signatured_type (struct signatured_type
*sig_type
)
23335 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
23337 gdb_assert (per_cu
->is_debug_types
);
23338 gdb_assert (per_cu
->cu
== NULL
);
23340 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
23341 read_signatured_type_reader
, NULL
);
23342 sig_type
->per_cu
.tu_read
= 1;
23345 /* Decode simple location descriptions.
23346 Given a pointer to a dwarf block that defines a location, compute
23347 the location and return the value.
23349 NOTE drow/2003-11-18: This function is called in two situations
23350 now: for the address of static or global variables (partial symbols
23351 only) and for offsets into structures which are expected to be
23352 (more or less) constant. The partial symbol case should go away,
23353 and only the constant case should remain. That will let this
23354 function complain more accurately. A few special modes are allowed
23355 without complaint for global variables (for instance, global
23356 register values and thread-local values).
23358 A location description containing no operations indicates that the
23359 object is optimized out. The return value is 0 for that case.
23360 FIXME drow/2003-11-16: No callers check for this case any more; soon all
23361 callers will only want a very basic result and this can become a
23364 Note that stack[0] is unused except as a default error return. */
23367 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
23369 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
23371 size_t size
= blk
->size
;
23372 const gdb_byte
*data
= blk
->data
;
23373 CORE_ADDR stack
[64];
23375 unsigned int bytes_read
, unsnd
;
23381 stack
[++stacki
] = 0;
23420 stack
[++stacki
] = op
- DW_OP_lit0
;
23455 stack
[++stacki
] = op
- DW_OP_reg0
;
23457 dwarf2_complex_location_expr_complaint ();
23461 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
23463 stack
[++stacki
] = unsnd
;
23465 dwarf2_complex_location_expr_complaint ();
23469 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
23474 case DW_OP_const1u
:
23475 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
23479 case DW_OP_const1s
:
23480 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
23484 case DW_OP_const2u
:
23485 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
23489 case DW_OP_const2s
:
23490 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
23494 case DW_OP_const4u
:
23495 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
23499 case DW_OP_const4s
:
23500 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
23504 case DW_OP_const8u
:
23505 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
23510 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
23516 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
23521 stack
[stacki
+ 1] = stack
[stacki
];
23526 stack
[stacki
- 1] += stack
[stacki
];
23530 case DW_OP_plus_uconst
:
23531 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
23537 stack
[stacki
- 1] -= stack
[stacki
];
23542 /* If we're not the last op, then we definitely can't encode
23543 this using GDB's address_class enum. This is valid for partial
23544 global symbols, although the variable's address will be bogus
23547 dwarf2_complex_location_expr_complaint ();
23550 case DW_OP_GNU_push_tls_address
:
23551 case DW_OP_form_tls_address
:
23552 /* The top of the stack has the offset from the beginning
23553 of the thread control block at which the variable is located. */
23554 /* Nothing should follow this operator, so the top of stack would
23556 /* This is valid for partial global symbols, but the variable's
23557 address will be bogus in the psymtab. Make it always at least
23558 non-zero to not look as a variable garbage collected by linker
23559 which have DW_OP_addr 0. */
23561 dwarf2_complex_location_expr_complaint ();
23565 case DW_OP_GNU_uninit
:
23568 case DW_OP_GNU_addr_index
:
23569 case DW_OP_GNU_const_index
:
23570 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
23577 const char *name
= get_DW_OP_name (op
);
23580 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
23583 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
23587 return (stack
[stacki
]);
23590 /* Enforce maximum stack depth of SIZE-1 to avoid writing
23591 outside of the allocated space. Also enforce minimum>0. */
23592 if (stacki
>= ARRAY_SIZE (stack
) - 1)
23594 complaint (&symfile_complaints
,
23595 _("location description stack overflow"));
23601 complaint (&symfile_complaints
,
23602 _("location description stack underflow"));
23606 return (stack
[stacki
]);
23609 /* memory allocation interface */
23611 static struct dwarf_block
*
23612 dwarf_alloc_block (struct dwarf2_cu
*cu
)
23614 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
23617 static struct die_info
*
23618 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
23620 struct die_info
*die
;
23621 size_t size
= sizeof (struct die_info
);
23624 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
23626 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
23627 memset (die
, 0, sizeof (struct die_info
));
23632 /* Macro support. */
23634 /* Return file name relative to the compilation directory of file number I in
23635 *LH's file name table. The result is allocated using xmalloc; the caller is
23636 responsible for freeing it. */
23639 file_file_name (int file
, struct line_header
*lh
)
23641 /* Is the file number a valid index into the line header's file name
23642 table? Remember that file numbers start with one, not zero. */
23643 if (1 <= file
&& file
<= lh
->file_names
.size ())
23645 const file_entry
&fe
= lh
->file_names
[file
- 1];
23647 if (!IS_ABSOLUTE_PATH (fe
.name
))
23649 const char *dir
= fe
.include_dir (lh
);
23651 return concat (dir
, SLASH_STRING
, fe
.name
, (char *) NULL
);
23653 return xstrdup (fe
.name
);
23657 /* The compiler produced a bogus file number. We can at least
23658 record the macro definitions made in the file, even if we
23659 won't be able to find the file by name. */
23660 char fake_name
[80];
23662 xsnprintf (fake_name
, sizeof (fake_name
),
23663 "<bad macro file number %d>", file
);
23665 complaint (&symfile_complaints
,
23666 _("bad file number in macro information (%d)"),
23669 return xstrdup (fake_name
);
23673 /* Return the full name of file number I in *LH's file name table.
23674 Use COMP_DIR as the name of the current directory of the
23675 compilation. The result is allocated using xmalloc; the caller is
23676 responsible for freeing it. */
23678 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
23680 /* Is the file number a valid index into the line header's file name
23681 table? Remember that file numbers start with one, not zero. */
23682 if (1 <= file
&& file
<= lh
->file_names
.size ())
23684 char *relative
= file_file_name (file
, lh
);
23686 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
23688 return reconcat (relative
, comp_dir
, SLASH_STRING
,
23689 relative
, (char *) NULL
);
23692 return file_file_name (file
, lh
);
23696 static struct macro_source_file
*
23697 macro_start_file (int file
, int line
,
23698 struct macro_source_file
*current_file
,
23699 struct line_header
*lh
)
23701 /* File name relative to the compilation directory of this source file. */
23702 char *file_name
= file_file_name (file
, lh
);
23704 if (! current_file
)
23706 /* Note: We don't create a macro table for this compilation unit
23707 at all until we actually get a filename. */
23708 struct macro_table
*macro_table
= get_macro_table ();
23710 /* If we have no current file, then this must be the start_file
23711 directive for the compilation unit's main source file. */
23712 current_file
= macro_set_main (macro_table
, file_name
);
23713 macro_define_special (macro_table
);
23716 current_file
= macro_include (current_file
, line
, file_name
);
23720 return current_file
;
23723 static const char *
23724 consume_improper_spaces (const char *p
, const char *body
)
23728 complaint (&symfile_complaints
,
23729 _("macro definition contains spaces "
23730 "in formal argument list:\n`%s'"),
23742 parse_macro_definition (struct macro_source_file
*file
, int line
,
23747 /* The body string takes one of two forms. For object-like macro
23748 definitions, it should be:
23750 <macro name> " " <definition>
23752 For function-like macro definitions, it should be:
23754 <macro name> "() " <definition>
23756 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
23758 Spaces may appear only where explicitly indicated, and in the
23761 The Dwarf 2 spec says that an object-like macro's name is always
23762 followed by a space, but versions of GCC around March 2002 omit
23763 the space when the macro's definition is the empty string.
23765 The Dwarf 2 spec says that there should be no spaces between the
23766 formal arguments in a function-like macro's formal argument list,
23767 but versions of GCC around March 2002 include spaces after the
23771 /* Find the extent of the macro name. The macro name is terminated
23772 by either a space or null character (for an object-like macro) or
23773 an opening paren (for a function-like macro). */
23774 for (p
= body
; *p
; p
++)
23775 if (*p
== ' ' || *p
== '(')
23778 if (*p
== ' ' || *p
== '\0')
23780 /* It's an object-like macro. */
23781 int name_len
= p
- body
;
23782 char *name
= savestring (body
, name_len
);
23783 const char *replacement
;
23786 replacement
= body
+ name_len
+ 1;
23789 dwarf2_macro_malformed_definition_complaint (body
);
23790 replacement
= body
+ name_len
;
23793 macro_define_object (file
, line
, name
, replacement
);
23797 else if (*p
== '(')
23799 /* It's a function-like macro. */
23800 char *name
= savestring (body
, p
- body
);
23803 char **argv
= XNEWVEC (char *, argv_size
);
23807 p
= consume_improper_spaces (p
, body
);
23809 /* Parse the formal argument list. */
23810 while (*p
&& *p
!= ')')
23812 /* Find the extent of the current argument name. */
23813 const char *arg_start
= p
;
23815 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
23818 if (! *p
|| p
== arg_start
)
23819 dwarf2_macro_malformed_definition_complaint (body
);
23822 /* Make sure argv has room for the new argument. */
23823 if (argc
>= argv_size
)
23826 argv
= XRESIZEVEC (char *, argv
, argv_size
);
23829 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
23832 p
= consume_improper_spaces (p
, body
);
23834 /* Consume the comma, if present. */
23839 p
= consume_improper_spaces (p
, body
);
23848 /* Perfectly formed definition, no complaints. */
23849 macro_define_function (file
, line
, name
,
23850 argc
, (const char **) argv
,
23852 else if (*p
== '\0')
23854 /* Complain, but do define it. */
23855 dwarf2_macro_malformed_definition_complaint (body
);
23856 macro_define_function (file
, line
, name
,
23857 argc
, (const char **) argv
,
23861 /* Just complain. */
23862 dwarf2_macro_malformed_definition_complaint (body
);
23865 /* Just complain. */
23866 dwarf2_macro_malformed_definition_complaint (body
);
23872 for (i
= 0; i
< argc
; i
++)
23878 dwarf2_macro_malformed_definition_complaint (body
);
23881 /* Skip some bytes from BYTES according to the form given in FORM.
23882 Returns the new pointer. */
23884 static const gdb_byte
*
23885 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
23886 enum dwarf_form form
,
23887 unsigned int offset_size
,
23888 struct dwarf2_section_info
*section
)
23890 unsigned int bytes_read
;
23894 case DW_FORM_data1
:
23899 case DW_FORM_data2
:
23903 case DW_FORM_data4
:
23907 case DW_FORM_data8
:
23911 case DW_FORM_data16
:
23915 case DW_FORM_string
:
23916 read_direct_string (abfd
, bytes
, &bytes_read
);
23917 bytes
+= bytes_read
;
23920 case DW_FORM_sec_offset
:
23922 case DW_FORM_GNU_strp_alt
:
23923 bytes
+= offset_size
;
23926 case DW_FORM_block
:
23927 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
23928 bytes
+= bytes_read
;
23931 case DW_FORM_block1
:
23932 bytes
+= 1 + read_1_byte (abfd
, bytes
);
23934 case DW_FORM_block2
:
23935 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
23937 case DW_FORM_block4
:
23938 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
23941 case DW_FORM_sdata
:
23942 case DW_FORM_udata
:
23943 case DW_FORM_GNU_addr_index
:
23944 case DW_FORM_GNU_str_index
:
23945 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
23948 dwarf2_section_buffer_overflow_complaint (section
);
23953 case DW_FORM_implicit_const
:
23958 complaint (&symfile_complaints
,
23959 _("invalid form 0x%x in `%s'"),
23960 form
, get_section_name (section
));
23968 /* A helper for dwarf_decode_macros that handles skipping an unknown
23969 opcode. Returns an updated pointer to the macro data buffer; or,
23970 on error, issues a complaint and returns NULL. */
23972 static const gdb_byte
*
23973 skip_unknown_opcode (unsigned int opcode
,
23974 const gdb_byte
**opcode_definitions
,
23975 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
23977 unsigned int offset_size
,
23978 struct dwarf2_section_info
*section
)
23980 unsigned int bytes_read
, i
;
23982 const gdb_byte
*defn
;
23984 if (opcode_definitions
[opcode
] == NULL
)
23986 complaint (&symfile_complaints
,
23987 _("unrecognized DW_MACFINO opcode 0x%x"),
23992 defn
= opcode_definitions
[opcode
];
23993 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
23994 defn
+= bytes_read
;
23996 for (i
= 0; i
< arg
; ++i
)
23998 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
23999 (enum dwarf_form
) defn
[i
], offset_size
,
24001 if (mac_ptr
== NULL
)
24003 /* skip_form_bytes already issued the complaint. */
24011 /* A helper function which parses the header of a macro section.
24012 If the macro section is the extended (for now called "GNU") type,
24013 then this updates *OFFSET_SIZE. Returns a pointer to just after
24014 the header, or issues a complaint and returns NULL on error. */
24016 static const gdb_byte
*
24017 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
24019 const gdb_byte
*mac_ptr
,
24020 unsigned int *offset_size
,
24021 int section_is_gnu
)
24023 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
24025 if (section_is_gnu
)
24027 unsigned int version
, flags
;
24029 version
= read_2_bytes (abfd
, mac_ptr
);
24030 if (version
!= 4 && version
!= 5)
24032 complaint (&symfile_complaints
,
24033 _("unrecognized version `%d' in .debug_macro section"),
24039 flags
= read_1_byte (abfd
, mac_ptr
);
24041 *offset_size
= (flags
& 1) ? 8 : 4;
24043 if ((flags
& 2) != 0)
24044 /* We don't need the line table offset. */
24045 mac_ptr
+= *offset_size
;
24047 /* Vendor opcode descriptions. */
24048 if ((flags
& 4) != 0)
24050 unsigned int i
, count
;
24052 count
= read_1_byte (abfd
, mac_ptr
);
24054 for (i
= 0; i
< count
; ++i
)
24056 unsigned int opcode
, bytes_read
;
24059 opcode
= read_1_byte (abfd
, mac_ptr
);
24061 opcode_definitions
[opcode
] = mac_ptr
;
24062 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24063 mac_ptr
+= bytes_read
;
24072 /* A helper for dwarf_decode_macros that handles the GNU extensions,
24073 including DW_MACRO_import. */
24076 dwarf_decode_macro_bytes (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
24078 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24079 struct macro_source_file
*current_file
,
24080 struct line_header
*lh
,
24081 struct dwarf2_section_info
*section
,
24082 int section_is_gnu
, int section_is_dwz
,
24083 unsigned int offset_size
,
24084 htab_t include_hash
)
24086 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24087 enum dwarf_macro_record_type macinfo_type
;
24088 int at_commandline
;
24089 const gdb_byte
*opcode_definitions
[256];
24091 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24092 &offset_size
, section_is_gnu
);
24093 if (mac_ptr
== NULL
)
24095 /* We already issued a complaint. */
24099 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
24100 GDB is still reading the definitions from command line. First
24101 DW_MACINFO_start_file will need to be ignored as it was already executed
24102 to create CURRENT_FILE for the main source holding also the command line
24103 definitions. On first met DW_MACINFO_start_file this flag is reset to
24104 normally execute all the remaining DW_MACINFO_start_file macinfos. */
24106 at_commandline
= 1;
24110 /* Do we at least have room for a macinfo type byte? */
24111 if (mac_ptr
>= mac_end
)
24113 dwarf2_section_buffer_overflow_complaint (section
);
24117 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24120 /* Note that we rely on the fact that the corresponding GNU and
24121 DWARF constants are the same. */
24123 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24124 switch (macinfo_type
)
24126 /* A zero macinfo type indicates the end of the macro
24131 case DW_MACRO_define
:
24132 case DW_MACRO_undef
:
24133 case DW_MACRO_define_strp
:
24134 case DW_MACRO_undef_strp
:
24135 case DW_MACRO_define_sup
:
24136 case DW_MACRO_undef_sup
:
24138 unsigned int bytes_read
;
24143 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24144 mac_ptr
+= bytes_read
;
24146 if (macinfo_type
== DW_MACRO_define
24147 || macinfo_type
== DW_MACRO_undef
)
24149 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24150 mac_ptr
+= bytes_read
;
24154 LONGEST str_offset
;
24156 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24157 mac_ptr
+= offset_size
;
24159 if (macinfo_type
== DW_MACRO_define_sup
24160 || macinfo_type
== DW_MACRO_undef_sup
24163 struct dwz_file
*dwz
24164 = dwarf2_get_dwz_file (dwarf2_per_objfile
);
24166 body
= read_indirect_string_from_dwz (objfile
,
24170 body
= read_indirect_string_at_offset (dwarf2_per_objfile
,
24174 is_define
= (macinfo_type
== DW_MACRO_define
24175 || macinfo_type
== DW_MACRO_define_strp
24176 || macinfo_type
== DW_MACRO_define_sup
);
24177 if (! current_file
)
24179 /* DWARF violation as no main source is present. */
24180 complaint (&symfile_complaints
,
24181 _("debug info with no main source gives macro %s "
24183 is_define
? _("definition") : _("undefinition"),
24187 if ((line
== 0 && !at_commandline
)
24188 || (line
!= 0 && at_commandline
))
24189 complaint (&symfile_complaints
,
24190 _("debug info gives %s macro %s with %s line %d: %s"),
24191 at_commandline
? _("command-line") : _("in-file"),
24192 is_define
? _("definition") : _("undefinition"),
24193 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
24196 parse_macro_definition (current_file
, line
, body
);
24199 gdb_assert (macinfo_type
== DW_MACRO_undef
24200 || macinfo_type
== DW_MACRO_undef_strp
24201 || macinfo_type
== DW_MACRO_undef_sup
);
24202 macro_undef (current_file
, line
, body
);
24207 case DW_MACRO_start_file
:
24209 unsigned int bytes_read
;
24212 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24213 mac_ptr
+= bytes_read
;
24214 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24215 mac_ptr
+= bytes_read
;
24217 if ((line
== 0 && !at_commandline
)
24218 || (line
!= 0 && at_commandline
))
24219 complaint (&symfile_complaints
,
24220 _("debug info gives source %d included "
24221 "from %s at %s line %d"),
24222 file
, at_commandline
? _("command-line") : _("file"),
24223 line
== 0 ? _("zero") : _("non-zero"), line
);
24225 if (at_commandline
)
24227 /* This DW_MACRO_start_file was executed in the
24229 at_commandline
= 0;
24232 current_file
= macro_start_file (file
, line
, current_file
, lh
);
24236 case DW_MACRO_end_file
:
24237 if (! current_file
)
24238 complaint (&symfile_complaints
,
24239 _("macro debug info has an unmatched "
24240 "`close_file' directive"));
24243 current_file
= current_file
->included_by
;
24244 if (! current_file
)
24246 enum dwarf_macro_record_type next_type
;
24248 /* GCC circa March 2002 doesn't produce the zero
24249 type byte marking the end of the compilation
24250 unit. Complain if it's not there, but exit no
24253 /* Do we at least have room for a macinfo type byte? */
24254 if (mac_ptr
>= mac_end
)
24256 dwarf2_section_buffer_overflow_complaint (section
);
24260 /* We don't increment mac_ptr here, so this is just
24263 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
24265 if (next_type
!= 0)
24266 complaint (&symfile_complaints
,
24267 _("no terminating 0-type entry for "
24268 "macros in `.debug_macinfo' section"));
24275 case DW_MACRO_import
:
24276 case DW_MACRO_import_sup
:
24280 bfd
*include_bfd
= abfd
;
24281 struct dwarf2_section_info
*include_section
= section
;
24282 const gdb_byte
*include_mac_end
= mac_end
;
24283 int is_dwz
= section_is_dwz
;
24284 const gdb_byte
*new_mac_ptr
;
24286 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24287 mac_ptr
+= offset_size
;
24289 if (macinfo_type
== DW_MACRO_import_sup
)
24291 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
24293 dwarf2_read_section (objfile
, &dwz
->macro
);
24295 include_section
= &dwz
->macro
;
24296 include_bfd
= get_section_bfd_owner (include_section
);
24297 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
24301 new_mac_ptr
= include_section
->buffer
+ offset
;
24302 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
24306 /* This has actually happened; see
24307 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
24308 complaint (&symfile_complaints
,
24309 _("recursive DW_MACRO_import in "
24310 ".debug_macro section"));
24314 *slot
= (void *) new_mac_ptr
;
24316 dwarf_decode_macro_bytes (dwarf2_per_objfile
,
24317 include_bfd
, new_mac_ptr
,
24318 include_mac_end
, current_file
, lh
,
24319 section
, section_is_gnu
, is_dwz
,
24320 offset_size
, include_hash
);
24322 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
24327 case DW_MACINFO_vendor_ext
:
24328 if (!section_is_gnu
)
24330 unsigned int bytes_read
;
24332 /* This reads the constant, but since we don't recognize
24333 any vendor extensions, we ignore it. */
24334 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24335 mac_ptr
+= bytes_read
;
24336 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24337 mac_ptr
+= bytes_read
;
24339 /* We don't recognize any vendor extensions. */
24345 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24346 mac_ptr
, mac_end
, abfd
, offset_size
,
24348 if (mac_ptr
== NULL
)
24353 } while (macinfo_type
!= 0);
24357 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
24358 int section_is_gnu
)
24360 struct dwarf2_per_objfile
*dwarf2_per_objfile
24361 = cu
->per_cu
->dwarf2_per_objfile
;
24362 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24363 struct line_header
*lh
= cu
->line_header
;
24365 const gdb_byte
*mac_ptr
, *mac_end
;
24366 struct macro_source_file
*current_file
= 0;
24367 enum dwarf_macro_record_type macinfo_type
;
24368 unsigned int offset_size
= cu
->header
.offset_size
;
24369 const gdb_byte
*opcode_definitions
[256];
24371 struct dwarf2_section_info
*section
;
24372 const char *section_name
;
24374 if (cu
->dwo_unit
!= NULL
)
24376 if (section_is_gnu
)
24378 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
24379 section_name
= ".debug_macro.dwo";
24383 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
24384 section_name
= ".debug_macinfo.dwo";
24389 if (section_is_gnu
)
24391 section
= &dwarf2_per_objfile
->macro
;
24392 section_name
= ".debug_macro";
24396 section
= &dwarf2_per_objfile
->macinfo
;
24397 section_name
= ".debug_macinfo";
24401 dwarf2_read_section (objfile
, section
);
24402 if (section
->buffer
== NULL
)
24404 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
24407 abfd
= get_section_bfd_owner (section
);
24409 /* First pass: Find the name of the base filename.
24410 This filename is needed in order to process all macros whose definition
24411 (or undefinition) comes from the command line. These macros are defined
24412 before the first DW_MACINFO_start_file entry, and yet still need to be
24413 associated to the base file.
24415 To determine the base file name, we scan the macro definitions until we
24416 reach the first DW_MACINFO_start_file entry. We then initialize
24417 CURRENT_FILE accordingly so that any macro definition found before the
24418 first DW_MACINFO_start_file can still be associated to the base file. */
24420 mac_ptr
= section
->buffer
+ offset
;
24421 mac_end
= section
->buffer
+ section
->size
;
24423 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24424 &offset_size
, section_is_gnu
);
24425 if (mac_ptr
== NULL
)
24427 /* We already issued a complaint. */
24433 /* Do we at least have room for a macinfo type byte? */
24434 if (mac_ptr
>= mac_end
)
24436 /* Complaint is printed during the second pass as GDB will probably
24437 stop the first pass earlier upon finding
24438 DW_MACINFO_start_file. */
24442 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24445 /* Note that we rely on the fact that the corresponding GNU and
24446 DWARF constants are the same. */
24448 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24449 switch (macinfo_type
)
24451 /* A zero macinfo type indicates the end of the macro
24456 case DW_MACRO_define
:
24457 case DW_MACRO_undef
:
24458 /* Only skip the data by MAC_PTR. */
24460 unsigned int bytes_read
;
24462 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24463 mac_ptr
+= bytes_read
;
24464 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24465 mac_ptr
+= bytes_read
;
24469 case DW_MACRO_start_file
:
24471 unsigned int bytes_read
;
24474 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24475 mac_ptr
+= bytes_read
;
24476 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24477 mac_ptr
+= bytes_read
;
24479 current_file
= macro_start_file (file
, line
, current_file
, lh
);
24483 case DW_MACRO_end_file
:
24484 /* No data to skip by MAC_PTR. */
24487 case DW_MACRO_define_strp
:
24488 case DW_MACRO_undef_strp
:
24489 case DW_MACRO_define_sup
:
24490 case DW_MACRO_undef_sup
:
24492 unsigned int bytes_read
;
24494 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24495 mac_ptr
+= bytes_read
;
24496 mac_ptr
+= offset_size
;
24500 case DW_MACRO_import
:
24501 case DW_MACRO_import_sup
:
24502 /* Note that, according to the spec, a transparent include
24503 chain cannot call DW_MACRO_start_file. So, we can just
24504 skip this opcode. */
24505 mac_ptr
+= offset_size
;
24508 case DW_MACINFO_vendor_ext
:
24509 /* Only skip the data by MAC_PTR. */
24510 if (!section_is_gnu
)
24512 unsigned int bytes_read
;
24514 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24515 mac_ptr
+= bytes_read
;
24516 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24517 mac_ptr
+= bytes_read
;
24522 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24523 mac_ptr
, mac_end
, abfd
, offset_size
,
24525 if (mac_ptr
== NULL
)
24530 } while (macinfo_type
!= 0 && current_file
== NULL
);
24532 /* Second pass: Process all entries.
24534 Use the AT_COMMAND_LINE flag to determine whether we are still processing
24535 command-line macro definitions/undefinitions. This flag is unset when we
24536 reach the first DW_MACINFO_start_file entry. */
24538 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
24540 NULL
, xcalloc
, xfree
));
24541 mac_ptr
= section
->buffer
+ offset
;
24542 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
24543 *slot
= (void *) mac_ptr
;
24544 dwarf_decode_macro_bytes (dwarf2_per_objfile
,
24545 abfd
, mac_ptr
, mac_end
,
24546 current_file
, lh
, section
,
24547 section_is_gnu
, 0, offset_size
,
24548 include_hash
.get ());
24551 /* Check if the attribute's form is a DW_FORM_block*
24552 if so return true else false. */
24555 attr_form_is_block (const struct attribute
*attr
)
24557 return (attr
== NULL
? 0 :
24558 attr
->form
== DW_FORM_block1
24559 || attr
->form
== DW_FORM_block2
24560 || attr
->form
== DW_FORM_block4
24561 || attr
->form
== DW_FORM_block
24562 || attr
->form
== DW_FORM_exprloc
);
24565 /* Return non-zero if ATTR's value is a section offset --- classes
24566 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
24567 You may use DW_UNSND (attr) to retrieve such offsets.
24569 Section 7.5.4, "Attribute Encodings", explains that no attribute
24570 may have a value that belongs to more than one of these classes; it
24571 would be ambiguous if we did, because we use the same forms for all
24575 attr_form_is_section_offset (const struct attribute
*attr
)
24577 return (attr
->form
== DW_FORM_data4
24578 || attr
->form
== DW_FORM_data8
24579 || attr
->form
== DW_FORM_sec_offset
);
24582 /* Return non-zero if ATTR's value falls in the 'constant' class, or
24583 zero otherwise. When this function returns true, you can apply
24584 dwarf2_get_attr_constant_value to it.
24586 However, note that for some attributes you must check
24587 attr_form_is_section_offset before using this test. DW_FORM_data4
24588 and DW_FORM_data8 are members of both the constant class, and of
24589 the classes that contain offsets into other debug sections
24590 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
24591 that, if an attribute's can be either a constant or one of the
24592 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
24593 taken as section offsets, not constants.
24595 DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
24596 cannot handle that. */
24599 attr_form_is_constant (const struct attribute
*attr
)
24601 switch (attr
->form
)
24603 case DW_FORM_sdata
:
24604 case DW_FORM_udata
:
24605 case DW_FORM_data1
:
24606 case DW_FORM_data2
:
24607 case DW_FORM_data4
:
24608 case DW_FORM_data8
:
24609 case DW_FORM_implicit_const
:
24617 /* DW_ADDR is always stored already as sect_offset; despite for the forms
24618 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
24621 attr_form_is_ref (const struct attribute
*attr
)
24623 switch (attr
->form
)
24625 case DW_FORM_ref_addr
:
24630 case DW_FORM_ref_udata
:
24631 case DW_FORM_GNU_ref_alt
:
24638 /* Return the .debug_loc section to use for CU.
24639 For DWO files use .debug_loc.dwo. */
24641 static struct dwarf2_section_info
*
24642 cu_debug_loc_section (struct dwarf2_cu
*cu
)
24644 struct dwarf2_per_objfile
*dwarf2_per_objfile
24645 = cu
->per_cu
->dwarf2_per_objfile
;
24649 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
24651 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
24653 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
24654 : &dwarf2_per_objfile
->loc
);
24657 /* A helper function that fills in a dwarf2_loclist_baton. */
24660 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
24661 struct dwarf2_loclist_baton
*baton
,
24662 const struct attribute
*attr
)
24664 struct dwarf2_per_objfile
*dwarf2_per_objfile
24665 = cu
->per_cu
->dwarf2_per_objfile
;
24666 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24668 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
24670 baton
->per_cu
= cu
->per_cu
;
24671 gdb_assert (baton
->per_cu
);
24672 /* We don't know how long the location list is, but make sure we
24673 don't run off the edge of the section. */
24674 baton
->size
= section
->size
- DW_UNSND (attr
);
24675 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
24676 baton
->base_address
= cu
->base_address
;
24677 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
24681 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
24682 struct dwarf2_cu
*cu
, int is_block
)
24684 struct dwarf2_per_objfile
*dwarf2_per_objfile
24685 = cu
->per_cu
->dwarf2_per_objfile
;
24686 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24687 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24689 if (attr_form_is_section_offset (attr
)
24690 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
24691 the section. If so, fall through to the complaint in the
24693 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
24695 struct dwarf2_loclist_baton
*baton
;
24697 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
24699 fill_in_loclist_baton (cu
, baton
, attr
);
24701 if (cu
->base_known
== 0)
24702 complaint (&symfile_complaints
,
24703 _("Location list used without "
24704 "specifying the CU base address."));
24706 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24707 ? dwarf2_loclist_block_index
24708 : dwarf2_loclist_index
);
24709 SYMBOL_LOCATION_BATON (sym
) = baton
;
24713 struct dwarf2_locexpr_baton
*baton
;
24715 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
24716 baton
->per_cu
= cu
->per_cu
;
24717 gdb_assert (baton
->per_cu
);
24719 if (attr_form_is_block (attr
))
24721 /* Note that we're just copying the block's data pointer
24722 here, not the actual data. We're still pointing into the
24723 info_buffer for SYM's objfile; right now we never release
24724 that buffer, but when we do clean up properly this may
24726 baton
->size
= DW_BLOCK (attr
)->size
;
24727 baton
->data
= DW_BLOCK (attr
)->data
;
24731 dwarf2_invalid_attrib_class_complaint ("location description",
24732 SYMBOL_NATURAL_NAME (sym
));
24736 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24737 ? dwarf2_locexpr_block_index
24738 : dwarf2_locexpr_index
);
24739 SYMBOL_LOCATION_BATON (sym
) = baton
;
24743 /* Return the OBJFILE associated with the compilation unit CU. If CU
24744 came from a separate debuginfo file, then the master objfile is
24748 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
24750 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24752 /* Return the master objfile, so that we can report and look up the
24753 correct file containing this variable. */
24754 if (objfile
->separate_debug_objfile_backlink
)
24755 objfile
= objfile
->separate_debug_objfile_backlink
;
24760 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
24761 (CU_HEADERP is unused in such case) or prepare a temporary copy at
24762 CU_HEADERP first. */
24764 static const struct comp_unit_head
*
24765 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
24766 struct dwarf2_per_cu_data
*per_cu
)
24768 const gdb_byte
*info_ptr
;
24771 return &per_cu
->cu
->header
;
24773 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
24775 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
24776 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
24777 rcuh_kind::COMPILE
);
24782 /* Return the address size given in the compilation unit header for CU. */
24785 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24787 struct comp_unit_head cu_header_local
;
24788 const struct comp_unit_head
*cu_headerp
;
24790 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24792 return cu_headerp
->addr_size
;
24795 /* Return the offset size given in the compilation unit header for CU. */
24798 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
24800 struct comp_unit_head cu_header_local
;
24801 const struct comp_unit_head
*cu_headerp
;
24803 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24805 return cu_headerp
->offset_size
;
24808 /* See its dwarf2loc.h declaration. */
24811 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24813 struct comp_unit_head cu_header_local
;
24814 const struct comp_unit_head
*cu_headerp
;
24816 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24818 if (cu_headerp
->version
== 2)
24819 return cu_headerp
->addr_size
;
24821 return cu_headerp
->offset_size
;
24824 /* Return the text offset of the CU. The returned offset comes from
24825 this CU's objfile. If this objfile came from a separate debuginfo
24826 file, then the offset may be different from the corresponding
24827 offset in the parent objfile. */
24830 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
24832 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24834 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
24837 /* Return DWARF version number of PER_CU. */
24840 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
24842 return per_cu
->dwarf_version
;
24845 /* Locate the .debug_info compilation unit from CU's objfile which contains
24846 the DIE at OFFSET. Raises an error on failure. */
24848 static struct dwarf2_per_cu_data
*
24849 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
24850 unsigned int offset_in_dwz
,
24851 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
24853 struct dwarf2_per_cu_data
*this_cu
;
24855 const sect_offset
*cu_off
;
24858 high
= dwarf2_per_objfile
->all_comp_units
.size () - 1;
24861 struct dwarf2_per_cu_data
*mid_cu
;
24862 int mid
= low
+ (high
- low
) / 2;
24864 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
24865 cu_off
= &mid_cu
->sect_off
;
24866 if (mid_cu
->is_dwz
> offset_in_dwz
24867 || (mid_cu
->is_dwz
== offset_in_dwz
&& *cu_off
>= sect_off
))
24872 gdb_assert (low
== high
);
24873 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
24874 cu_off
= &this_cu
->sect_off
;
24875 if (this_cu
->is_dwz
!= offset_in_dwz
|| *cu_off
> sect_off
)
24877 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
24878 error (_("Dwarf Error: could not find partial DIE containing "
24879 "offset %s [in module %s]"),
24880 sect_offset_str (sect_off
),
24881 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
24883 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
24885 return dwarf2_per_objfile
->all_comp_units
[low
-1];
24889 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
24890 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
24891 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
24892 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
24893 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
24898 /* Initialize dwarf2_cu CU, owned by PER_CU. */
24900 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
24901 : per_cu (per_cu_
),
24904 checked_producer (0),
24905 producer_is_gxx_lt_4_6 (0),
24906 producer_is_gcc_lt_4_3 (0),
24907 producer_is_icc_lt_14 (0),
24908 processing_has_namespace_info (0)
24913 /* Destroy a dwarf2_cu. */
24915 dwarf2_cu::~dwarf2_cu ()
24920 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
24923 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
24924 enum language pretend_language
)
24926 struct attribute
*attr
;
24928 /* Set the language we're debugging. */
24929 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
24931 set_cu_language (DW_UNSND (attr
), cu
);
24934 cu
->language
= pretend_language
;
24935 cu
->language_defn
= language_def (cu
->language
);
24938 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
24941 /* Increase the age counter on each cached compilation unit, and free
24942 any that are too old. */
24945 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
24947 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
24949 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
24950 per_cu
= dwarf2_per_objfile
->read_in_chain
;
24951 while (per_cu
!= NULL
)
24953 per_cu
->cu
->last_used
++;
24954 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
24955 dwarf2_mark (per_cu
->cu
);
24956 per_cu
= per_cu
->cu
->read_in_chain
;
24959 per_cu
= dwarf2_per_objfile
->read_in_chain
;
24960 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
24961 while (per_cu
!= NULL
)
24963 struct dwarf2_per_cu_data
*next_cu
;
24965 next_cu
= per_cu
->cu
->read_in_chain
;
24967 if (!per_cu
->cu
->mark
)
24970 *last_chain
= next_cu
;
24973 last_chain
= &per_cu
->cu
->read_in_chain
;
24979 /* Remove a single compilation unit from the cache. */
24982 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
24984 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
24985 struct dwarf2_per_objfile
*dwarf2_per_objfile
24986 = target_per_cu
->dwarf2_per_objfile
;
24988 per_cu
= dwarf2_per_objfile
->read_in_chain
;
24989 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
24990 while (per_cu
!= NULL
)
24992 struct dwarf2_per_cu_data
*next_cu
;
24994 next_cu
= per_cu
->cu
->read_in_chain
;
24996 if (per_cu
== target_per_cu
)
25000 *last_chain
= next_cu
;
25004 last_chain
= &per_cu
->cu
->read_in_chain
;
25010 /* Release all extra memory associated with OBJFILE. */
25013 dwarf2_free_objfile (struct objfile
*objfile
)
25015 struct dwarf2_per_objfile
*dwarf2_per_objfile
25016 = get_dwarf2_per_objfile (objfile
);
25018 delete dwarf2_per_objfile
;
25021 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
25022 We store these in a hash table separate from the DIEs, and preserve them
25023 when the DIEs are flushed out of cache.
25025 The CU "per_cu" pointer is needed because offset alone is not enough to
25026 uniquely identify the type. A file may have multiple .debug_types sections,
25027 or the type may come from a DWO file. Furthermore, while it's more logical
25028 to use per_cu->section+offset, with Fission the section with the data is in
25029 the DWO file but we don't know that section at the point we need it.
25030 We have to use something in dwarf2_per_cu_data (or the pointer to it)
25031 because we can enter the lookup routine, get_die_type_at_offset, from
25032 outside this file, and thus won't necessarily have PER_CU->cu.
25033 Fortunately, PER_CU is stable for the life of the objfile. */
25035 struct dwarf2_per_cu_offset_and_type
25037 const struct dwarf2_per_cu_data
*per_cu
;
25038 sect_offset sect_off
;
25042 /* Hash function for a dwarf2_per_cu_offset_and_type. */
25045 per_cu_offset_and_type_hash (const void *item
)
25047 const struct dwarf2_per_cu_offset_and_type
*ofs
25048 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
25050 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
25053 /* Equality function for a dwarf2_per_cu_offset_and_type. */
25056 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
25058 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
25059 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
25060 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
25061 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
25063 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
25064 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
25067 /* Set the type associated with DIE to TYPE. Save it in CU's hash
25068 table if necessary. For convenience, return TYPE.
25070 The DIEs reading must have careful ordering to:
25071 * Not cause infite loops trying to read in DIEs as a prerequisite for
25072 reading current DIE.
25073 * Not trying to dereference contents of still incompletely read in types
25074 while reading in other DIEs.
25075 * Enable referencing still incompletely read in types just by a pointer to
25076 the type without accessing its fields.
25078 Therefore caller should follow these rules:
25079 * Try to fetch any prerequisite types we may need to build this DIE type
25080 before building the type and calling set_die_type.
25081 * After building type call set_die_type for current DIE as soon as
25082 possible before fetching more types to complete the current type.
25083 * Make the type as complete as possible before fetching more types. */
25085 static struct type
*
25086 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
25088 struct dwarf2_per_objfile
*dwarf2_per_objfile
25089 = cu
->per_cu
->dwarf2_per_objfile
;
25090 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
25091 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25092 struct attribute
*attr
;
25093 struct dynamic_prop prop
;
25095 /* For Ada types, make sure that the gnat-specific data is always
25096 initialized (if not already set). There are a few types where
25097 we should not be doing so, because the type-specific area is
25098 already used to hold some other piece of info (eg: TYPE_CODE_FLT
25099 where the type-specific area is used to store the floatformat).
25100 But this is not a problem, because the gnat-specific information
25101 is actually not needed for these types. */
25102 if (need_gnat_info (cu
)
25103 && TYPE_CODE (type
) != TYPE_CODE_FUNC
25104 && TYPE_CODE (type
) != TYPE_CODE_FLT
25105 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
25106 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
25107 && TYPE_CODE (type
) != TYPE_CODE_METHOD
25108 && !HAVE_GNAT_AUX_INFO (type
))
25109 INIT_GNAT_SPECIFIC (type
);
25111 /* Read DW_AT_allocated and set in type. */
25112 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
25113 if (attr_form_is_block (attr
))
25115 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25116 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
);
25118 else if (attr
!= NULL
)
25120 complaint (&symfile_complaints
,
25121 _("DW_AT_allocated has the wrong form (%s) at DIE %s"),
25122 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25123 sect_offset_str (die
->sect_off
));
25126 /* Read DW_AT_associated and set in type. */
25127 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
25128 if (attr_form_is_block (attr
))
25130 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25131 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
);
25133 else if (attr
!= NULL
)
25135 complaint (&symfile_complaints
,
25136 _("DW_AT_associated has the wrong form (%s) at DIE %s"),
25137 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25138 sect_offset_str (die
->sect_off
));
25141 /* Read DW_AT_data_location and set in type. */
25142 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
25143 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25144 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
);
25146 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25148 dwarf2_per_objfile
->die_type_hash
=
25149 htab_create_alloc_ex (127,
25150 per_cu_offset_and_type_hash
,
25151 per_cu_offset_and_type_eq
,
25153 &objfile
->objfile_obstack
,
25154 hashtab_obstack_allocate
,
25155 dummy_obstack_deallocate
);
25158 ofs
.per_cu
= cu
->per_cu
;
25159 ofs
.sect_off
= die
->sect_off
;
25161 slot
= (struct dwarf2_per_cu_offset_and_type
**)
25162 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
25164 complaint (&symfile_complaints
,
25165 _("A problem internal to GDB: DIE %s has type already set"),
25166 sect_offset_str (die
->sect_off
));
25167 *slot
= XOBNEW (&objfile
->objfile_obstack
,
25168 struct dwarf2_per_cu_offset_and_type
);
25173 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
25174 or return NULL if the die does not have a saved type. */
25176 static struct type
*
25177 get_die_type_at_offset (sect_offset sect_off
,
25178 struct dwarf2_per_cu_data
*per_cu
)
25180 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
25181 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
25183 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25186 ofs
.per_cu
= per_cu
;
25187 ofs
.sect_off
= sect_off
;
25188 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
25189 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
25196 /* Look up the type for DIE in CU in die_type_hash,
25197 or return NULL if DIE does not have a saved type. */
25199 static struct type
*
25200 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
25202 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
25205 /* Add a dependence relationship from CU to REF_PER_CU. */
25208 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
25209 struct dwarf2_per_cu_data
*ref_per_cu
)
25213 if (cu
->dependencies
== NULL
)
25215 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
25216 NULL
, &cu
->comp_unit_obstack
,
25217 hashtab_obstack_allocate
,
25218 dummy_obstack_deallocate
);
25220 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
25222 *slot
= ref_per_cu
;
25225 /* Subroutine of dwarf2_mark to pass to htab_traverse.
25226 Set the mark field in every compilation unit in the
25227 cache that we must keep because we are keeping CU. */
25230 dwarf2_mark_helper (void **slot
, void *data
)
25232 struct dwarf2_per_cu_data
*per_cu
;
25234 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
25236 /* cu->dependencies references may not yet have been ever read if QUIT aborts
25237 reading of the chain. As such dependencies remain valid it is not much
25238 useful to track and undo them during QUIT cleanups. */
25239 if (per_cu
->cu
== NULL
)
25242 if (per_cu
->cu
->mark
)
25244 per_cu
->cu
->mark
= 1;
25246 if (per_cu
->cu
->dependencies
!= NULL
)
25247 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25252 /* Set the mark field in CU and in every other compilation unit in the
25253 cache that we must keep because we are keeping CU. */
25256 dwarf2_mark (struct dwarf2_cu
*cu
)
25261 if (cu
->dependencies
!= NULL
)
25262 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25266 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
25270 per_cu
->cu
->mark
= 0;
25271 per_cu
= per_cu
->cu
->read_in_chain
;
25275 /* Trivial hash function for partial_die_info: the hash value of a DIE
25276 is its offset in .debug_info for this objfile. */
25279 partial_die_hash (const void *item
)
25281 const struct partial_die_info
*part_die
25282 = (const struct partial_die_info
*) item
;
25284 return to_underlying (part_die
->sect_off
);
25287 /* Trivial comparison function for partial_die_info structures: two DIEs
25288 are equal if they have the same offset. */
25291 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
25293 const struct partial_die_info
*part_die_lhs
25294 = (const struct partial_die_info
*) item_lhs
;
25295 const struct partial_die_info
*part_die_rhs
25296 = (const struct partial_die_info
*) item_rhs
;
25298 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
25301 static struct cmd_list_element
*set_dwarf_cmdlist
;
25302 static struct cmd_list_element
*show_dwarf_cmdlist
;
25305 set_dwarf_cmd (const char *args
, int from_tty
)
25307 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
25312 show_dwarf_cmd (const char *args
, int from_tty
)
25314 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
25317 int dwarf_always_disassemble
;
25320 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
25321 struct cmd_list_element
*c
, const char *value
)
25323 fprintf_filtered (file
,
25324 _("Whether to always disassemble "
25325 "DWARF expressions is %s.\n"),
25330 show_check_physname (struct ui_file
*file
, int from_tty
,
25331 struct cmd_list_element
*c
, const char *value
)
25333 fprintf_filtered (file
,
25334 _("Whether to check \"physname\" is %s.\n"),
25339 _initialize_dwarf2_read (void)
25342 dwarf2_objfile_data_key
= register_objfile_data ();
25344 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
25345 Set DWARF specific variables.\n\
25346 Configure DWARF variables such as the cache size"),
25347 &set_dwarf_cmdlist
, "maintenance set dwarf ",
25348 0/*allow-unknown*/, &maintenance_set_cmdlist
);
25350 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
25351 Show DWARF specific variables\n\
25352 Show DWARF variables such as the cache size"),
25353 &show_dwarf_cmdlist
, "maintenance show dwarf ",
25354 0/*allow-unknown*/, &maintenance_show_cmdlist
);
25356 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
25357 &dwarf_max_cache_age
, _("\
25358 Set the upper bound on the age of cached DWARF compilation units."), _("\
25359 Show the upper bound on the age of cached DWARF compilation units."), _("\
25360 A higher limit means that cached compilation units will be stored\n\
25361 in memory longer, and more total memory will be used. Zero disables\n\
25362 caching, which can slow down startup."),
25364 show_dwarf_max_cache_age
,
25365 &set_dwarf_cmdlist
,
25366 &show_dwarf_cmdlist
);
25368 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
25369 &dwarf_always_disassemble
, _("\
25370 Set whether `info address' always disassembles DWARF expressions."), _("\
25371 Show whether `info address' always disassembles DWARF expressions."), _("\
25372 When enabled, DWARF expressions are always printed in an assembly-like\n\
25373 syntax. When disabled, expressions will be printed in a more\n\
25374 conversational style, when possible."),
25376 show_dwarf_always_disassemble
,
25377 &set_dwarf_cmdlist
,
25378 &show_dwarf_cmdlist
);
25380 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
25381 Set debugging of the DWARF reader."), _("\
25382 Show debugging of the DWARF reader."), _("\
25383 When enabled (non-zero), debugging messages are printed during DWARF\n\
25384 reading and symtab expansion. A value of 1 (one) provides basic\n\
25385 information. A value greater than 1 provides more verbose information."),
25388 &setdebuglist
, &showdebuglist
);
25390 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
25391 Set debugging of the DWARF DIE reader."), _("\
25392 Show debugging of the DWARF DIE reader."), _("\
25393 When enabled (non-zero), DIEs are dumped after they are read in.\n\
25394 The value is the maximum depth to print."),
25397 &setdebuglist
, &showdebuglist
);
25399 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
25400 Set debugging of the dwarf line reader."), _("\
25401 Show debugging of the dwarf line reader."), _("\
25402 When enabled (non-zero), line number entries are dumped as they are read in.\n\
25403 A value of 1 (one) provides basic information.\n\
25404 A value greater than 1 provides more verbose information."),
25407 &setdebuglist
, &showdebuglist
);
25409 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
25410 Set cross-checking of \"physname\" code against demangler."), _("\
25411 Show cross-checking of \"physname\" code against demangler."), _("\
25412 When enabled, GDB's internal \"physname\" code is checked against\n\
25414 NULL
, show_check_physname
,
25415 &setdebuglist
, &showdebuglist
);
25417 add_setshow_boolean_cmd ("use-deprecated-index-sections",
25418 no_class
, &use_deprecated_index_sections
, _("\
25419 Set whether to use deprecated gdb_index sections."), _("\
25420 Show whether to use deprecated gdb_index sections."), _("\
25421 When enabled, deprecated .gdb_index sections are used anyway.\n\
25422 Normally they are ignored either because of a missing feature or\n\
25423 performance issue.\n\
25424 Warning: This option must be enabled before gdb reads the file."),
25427 &setlist
, &showlist
);
25429 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25430 &dwarf2_locexpr_funcs
);
25431 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25432 &dwarf2_loclist_funcs
);
25434 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25435 &dwarf2_block_frame_base_locexpr_funcs
);
25436 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25437 &dwarf2_block_frame_base_loclist_funcs
);
25440 selftests::register_test ("dw2_expand_symtabs_matching",
25441 selftests::dw2_expand_symtabs_matching::run_test
);