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_CODE (disr_type
) != TYPE_CODE_STRUCT
)
9994 /* All fields of a true enum will be structs. */
9997 else if (TYPE_NFIELDS (disr_type
) == 0)
9999 /* Could be data-less variant, so keep going. */
10000 disr_type
= nullptr;
10002 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
10003 "RUST$ENUM$DISR") != 0)
10005 /* Not a Rust enum. */
10015 /* If we got here without a discriminant, then it's probably
10017 if (disr_type
== nullptr)
10020 /* Smash this type to be a structure type. We have to do this
10021 because the type has already been recorded. */
10022 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10024 /* Make a union to hold the variants. */
10025 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
10026 struct type
*union_type
= alloc_type (objfile
);
10027 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10028 TYPE_NFIELDS (union_type
) = 1 + TYPE_NFIELDS (type
);
10029 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10030 TYPE_FIELDS (union_type
)
10031 = (struct field
*) TYPE_ZALLOC (union_type
,
10032 (TYPE_NFIELDS (union_type
)
10033 * sizeof (struct field
)));
10035 memcpy (TYPE_FIELDS (union_type
) + 1, TYPE_FIELDS (type
),
10036 TYPE_NFIELDS (type
) * sizeof (struct field
));
10038 /* Install the discriminant at index 0 in the union. */
10039 TYPE_FIELD (union_type
, 0) = *disr_field
;
10040 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
10041 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
10043 /* Install the union in the outer struct type. */
10044 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10045 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10046 TYPE_NFIELDS (type
) = 1;
10048 /* Set the size and offset of the union type. */
10049 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10051 /* We need a way to find the correct discriminant given a
10052 variant name. For convenience we build a map here. */
10053 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
10054 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
10055 for (int i
= 0; i
< TYPE_NFIELDS (enum_type
); ++i
)
10057 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
10060 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
10061 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
10065 int n_fields
= TYPE_NFIELDS (union_type
);
10066 struct discriminant_info
*disc
10067 = alloc_discriminant_info (union_type
, 0, -1);
10068 /* Skip the discriminant here. */
10069 for (int i
= 1; i
< n_fields
; ++i
)
10071 /* Find the final word in the name of this variant's type.
10072 That name can be used to look up the correct
10074 const char *variant_name
10075 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
,
10078 auto iter
= discriminant_map
.find (variant_name
);
10079 if (iter
!= discriminant_map
.end ())
10080 disc
->discriminants
[i
] = iter
->second
;
10082 /* Remove the discriminant field. */
10083 struct type
*sub_type
= TYPE_FIELD_TYPE (union_type
, i
);
10084 --TYPE_NFIELDS (sub_type
);
10085 ++TYPE_FIELDS (sub_type
);
10086 TYPE_FIELD_NAME (union_type
, i
) = variant_name
;
10087 TYPE_NAME (sub_type
)
10088 = rust_fully_qualify (&objfile
->objfile_obstack
,
10089 TYPE_NAME (type
), variant_name
);
10094 /* Rewrite some Rust unions to be structures with variants parts. */
10097 rust_union_quirks (struct dwarf2_cu
*cu
)
10099 gdb_assert (cu
->language
== language_rust
);
10100 for (struct type
*type
: cu
->rust_unions
)
10101 quirk_rust_enum (type
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
10104 /* Return the symtab for PER_CU. This works properly regardless of
10105 whether we're using the index or psymtabs. */
10107 static struct compunit_symtab
*
10108 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
10110 return (per_cu
->dwarf2_per_objfile
->using_index
10111 ? per_cu
->v
.quick
->compunit_symtab
10112 : per_cu
->v
.psymtab
->compunit_symtab
);
10115 /* A helper function for computing the list of all symbol tables
10116 included by PER_CU. */
10119 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
10120 htab_t all_children
, htab_t all_type_symtabs
,
10121 struct dwarf2_per_cu_data
*per_cu
,
10122 struct compunit_symtab
*immediate_parent
)
10126 struct compunit_symtab
*cust
;
10127 struct dwarf2_per_cu_data
*iter
;
10129 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
10132 /* This inclusion and its children have been processed. */
10137 /* Only add a CU if it has a symbol table. */
10138 cust
= get_compunit_symtab (per_cu
);
10141 /* If this is a type unit only add its symbol table if we haven't
10142 seen it yet (type unit per_cu's can share symtabs). */
10143 if (per_cu
->is_debug_types
)
10145 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
10149 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
10150 if (cust
->user
== NULL
)
10151 cust
->user
= immediate_parent
;
10156 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
10157 if (cust
->user
== NULL
)
10158 cust
->user
= immediate_parent
;
10163 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
10166 recursively_compute_inclusions (result
, all_children
,
10167 all_type_symtabs
, iter
, cust
);
10171 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
10175 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
10177 gdb_assert (! per_cu
->is_debug_types
);
10179 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
10182 struct dwarf2_per_cu_data
*per_cu_iter
;
10183 struct compunit_symtab
*compunit_symtab_iter
;
10184 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
10185 htab_t all_children
, all_type_symtabs
;
10186 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
10188 /* If we don't have a symtab, we can just skip this case. */
10192 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10193 NULL
, xcalloc
, xfree
);
10194 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10195 NULL
, xcalloc
, xfree
);
10198 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
10202 recursively_compute_inclusions (&result_symtabs
, all_children
,
10203 all_type_symtabs
, per_cu_iter
,
10207 /* Now we have a transitive closure of all the included symtabs. */
10208 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
10210 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
10211 struct compunit_symtab
*, len
+ 1);
10213 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
10214 compunit_symtab_iter
);
10216 cust
->includes
[ix
] = compunit_symtab_iter
;
10217 cust
->includes
[len
] = NULL
;
10219 VEC_free (compunit_symtab_ptr
, result_symtabs
);
10220 htab_delete (all_children
);
10221 htab_delete (all_type_symtabs
);
10225 /* Compute the 'includes' field for the symtabs of all the CUs we just
10229 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
10232 struct dwarf2_per_cu_data
*iter
;
10235 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
10239 if (! iter
->is_debug_types
)
10240 compute_compunit_symtab_includes (iter
);
10243 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
10246 /* Generate full symbol information for PER_CU, whose DIEs have
10247 already been loaded into memory. */
10250 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
10251 enum language pretend_language
)
10253 struct dwarf2_cu
*cu
= per_cu
->cu
;
10254 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10255 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10256 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10257 CORE_ADDR lowpc
, highpc
;
10258 struct compunit_symtab
*cust
;
10259 CORE_ADDR baseaddr
;
10260 struct block
*static_block
;
10263 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10266 scoped_free_pendings free_pending
;
10268 /* Clear the list here in case something was left over. */
10269 cu
->method_list
.clear ();
10271 cu
->list_in_scope
= &file_symbols
;
10273 cu
->language
= pretend_language
;
10274 cu
->language_defn
= language_def (cu
->language
);
10276 /* Do line number decoding in read_file_scope () */
10277 process_die (cu
->dies
, cu
);
10279 /* For now fudge the Go package. */
10280 if (cu
->language
== language_go
)
10281 fixup_go_packaging (cu
);
10283 /* Now that we have processed all the DIEs in the CU, all the types
10284 should be complete, and it should now be safe to compute all of the
10286 compute_delayed_physnames (cu
);
10288 if (cu
->language
== language_rust
)
10289 rust_union_quirks (cu
);
10291 /* Some compilers don't define a DW_AT_high_pc attribute for the
10292 compilation unit. If the DW_AT_high_pc is missing, synthesize
10293 it, by scanning the DIE's below the compilation unit. */
10294 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
10296 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
10297 static_block
= end_symtab_get_static_block (addr
, 0, 1);
10299 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
10300 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
10301 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
10302 addrmap to help ensure it has an accurate map of pc values belonging to
10304 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
10306 cust
= end_symtab_from_static_block (static_block
,
10307 SECT_OFF_TEXT (objfile
), 0);
10311 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
10313 /* Set symtab language to language from DW_AT_language. If the
10314 compilation is from a C file generated by language preprocessors, do
10315 not set the language if it was already deduced by start_subfile. */
10316 if (!(cu
->language
== language_c
10317 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
10318 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10320 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
10321 produce DW_AT_location with location lists but it can be possibly
10322 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
10323 there were bugs in prologue debug info, fixed later in GCC-4.5
10324 by "unwind info for epilogues" patch (which is not directly related).
10326 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
10327 needed, it would be wrong due to missing DW_AT_producer there.
10329 Still one can confuse GDB by using non-standard GCC compilation
10330 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
10332 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
10333 cust
->locations_valid
= 1;
10335 if (gcc_4_minor
>= 5)
10336 cust
->epilogue_unwind_valid
= 1;
10338 cust
->call_site_htab
= cu
->call_site_htab
;
10341 if (dwarf2_per_objfile
->using_index
)
10342 per_cu
->v
.quick
->compunit_symtab
= cust
;
10345 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10346 pst
->compunit_symtab
= cust
;
10350 /* Push it for inclusion processing later. */
10351 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
10354 /* Generate full symbol information for type unit PER_CU, whose DIEs have
10355 already been loaded into memory. */
10358 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
10359 enum language pretend_language
)
10361 struct dwarf2_cu
*cu
= per_cu
->cu
;
10362 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10363 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10364 struct compunit_symtab
*cust
;
10365 struct signatured_type
*sig_type
;
10367 gdb_assert (per_cu
->is_debug_types
);
10368 sig_type
= (struct signatured_type
*) per_cu
;
10371 scoped_free_pendings free_pending
;
10373 /* Clear the list here in case something was left over. */
10374 cu
->method_list
.clear ();
10376 cu
->list_in_scope
= &file_symbols
;
10378 cu
->language
= pretend_language
;
10379 cu
->language_defn
= language_def (cu
->language
);
10381 /* The symbol tables are set up in read_type_unit_scope. */
10382 process_die (cu
->dies
, cu
);
10384 /* For now fudge the Go package. */
10385 if (cu
->language
== language_go
)
10386 fixup_go_packaging (cu
);
10388 /* Now that we have processed all the DIEs in the CU, all the types
10389 should be complete, and it should now be safe to compute all of the
10391 compute_delayed_physnames (cu
);
10393 if (cu
->language
== language_rust
)
10394 rust_union_quirks (cu
);
10396 /* TUs share symbol tables.
10397 If this is the first TU to use this symtab, complete the construction
10398 of it with end_expandable_symtab. Otherwise, complete the addition of
10399 this TU's symbols to the existing symtab. */
10400 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
10402 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
10403 sig_type
->type_unit_group
->compunit_symtab
= cust
;
10407 /* Set symtab language to language from DW_AT_language. If the
10408 compilation is from a C file generated by language preprocessors,
10409 do not set the language if it was already deduced by
10411 if (!(cu
->language
== language_c
10412 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
10413 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10418 augment_type_symtab ();
10419 cust
= sig_type
->type_unit_group
->compunit_symtab
;
10422 if (dwarf2_per_objfile
->using_index
)
10423 per_cu
->v
.quick
->compunit_symtab
= cust
;
10426 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10427 pst
->compunit_symtab
= cust
;
10432 /* Process an imported unit DIE. */
10435 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10437 struct attribute
*attr
;
10439 /* For now we don't handle imported units in type units. */
10440 if (cu
->per_cu
->is_debug_types
)
10442 error (_("Dwarf Error: DW_TAG_imported_unit is not"
10443 " supported in type units [in module %s]"),
10444 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
10447 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10450 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
10451 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
10452 dwarf2_per_cu_data
*per_cu
10453 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
10454 cu
->per_cu
->dwarf2_per_objfile
);
10456 /* If necessary, add it to the queue and load its DIEs. */
10457 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
10458 load_full_comp_unit (per_cu
, cu
->language
);
10460 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
10465 /* RAII object that represents a process_die scope: i.e.,
10466 starts/finishes processing a DIE. */
10467 class process_die_scope
10470 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
10471 : m_die (die
), m_cu (cu
)
10473 /* We should only be processing DIEs not already in process. */
10474 gdb_assert (!m_die
->in_process
);
10475 m_die
->in_process
= true;
10478 ~process_die_scope ()
10480 m_die
->in_process
= false;
10482 /* If we're done processing the DIE for the CU that owns the line
10483 header, we don't need the line header anymore. */
10484 if (m_cu
->line_header_die_owner
== m_die
)
10486 delete m_cu
->line_header
;
10487 m_cu
->line_header
= NULL
;
10488 m_cu
->line_header_die_owner
= NULL
;
10497 /* Process a die and its children. */
10500 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10502 process_die_scope
scope (die
, cu
);
10506 case DW_TAG_padding
:
10508 case DW_TAG_compile_unit
:
10509 case DW_TAG_partial_unit
:
10510 read_file_scope (die
, cu
);
10512 case DW_TAG_type_unit
:
10513 read_type_unit_scope (die
, cu
);
10515 case DW_TAG_subprogram
:
10516 case DW_TAG_inlined_subroutine
:
10517 read_func_scope (die
, cu
);
10519 case DW_TAG_lexical_block
:
10520 case DW_TAG_try_block
:
10521 case DW_TAG_catch_block
:
10522 read_lexical_block_scope (die
, cu
);
10524 case DW_TAG_call_site
:
10525 case DW_TAG_GNU_call_site
:
10526 read_call_site_scope (die
, cu
);
10528 case DW_TAG_class_type
:
10529 case DW_TAG_interface_type
:
10530 case DW_TAG_structure_type
:
10531 case DW_TAG_union_type
:
10532 process_structure_scope (die
, cu
);
10534 case DW_TAG_enumeration_type
:
10535 process_enumeration_scope (die
, cu
);
10538 /* These dies have a type, but processing them does not create
10539 a symbol or recurse to process the children. Therefore we can
10540 read them on-demand through read_type_die. */
10541 case DW_TAG_subroutine_type
:
10542 case DW_TAG_set_type
:
10543 case DW_TAG_array_type
:
10544 case DW_TAG_pointer_type
:
10545 case DW_TAG_ptr_to_member_type
:
10546 case DW_TAG_reference_type
:
10547 case DW_TAG_rvalue_reference_type
:
10548 case DW_TAG_string_type
:
10551 case DW_TAG_base_type
:
10552 case DW_TAG_subrange_type
:
10553 case DW_TAG_typedef
:
10554 /* Add a typedef symbol for the type definition, if it has a
10556 new_symbol (die
, read_type_die (die
, cu
), cu
);
10558 case DW_TAG_common_block
:
10559 read_common_block (die
, cu
);
10561 case DW_TAG_common_inclusion
:
10563 case DW_TAG_namespace
:
10564 cu
->processing_has_namespace_info
= 1;
10565 read_namespace (die
, cu
);
10567 case DW_TAG_module
:
10568 cu
->processing_has_namespace_info
= 1;
10569 read_module (die
, cu
);
10571 case DW_TAG_imported_declaration
:
10572 cu
->processing_has_namespace_info
= 1;
10573 if (read_namespace_alias (die
, cu
))
10575 /* The declaration is not a global namespace alias: fall through. */
10576 case DW_TAG_imported_module
:
10577 cu
->processing_has_namespace_info
= 1;
10578 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10579 || cu
->language
!= language_fortran
))
10580 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
10581 dwarf_tag_name (die
->tag
));
10582 read_import_statement (die
, cu
);
10585 case DW_TAG_imported_unit
:
10586 process_imported_unit_die (die
, cu
);
10589 case DW_TAG_variable
:
10590 read_variable (die
, cu
);
10594 new_symbol (die
, NULL
, cu
);
10599 /* DWARF name computation. */
10601 /* A helper function for dwarf2_compute_name which determines whether DIE
10602 needs to have the name of the scope prepended to the name listed in the
10606 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10608 struct attribute
*attr
;
10612 case DW_TAG_namespace
:
10613 case DW_TAG_typedef
:
10614 case DW_TAG_class_type
:
10615 case DW_TAG_interface_type
:
10616 case DW_TAG_structure_type
:
10617 case DW_TAG_union_type
:
10618 case DW_TAG_enumeration_type
:
10619 case DW_TAG_enumerator
:
10620 case DW_TAG_subprogram
:
10621 case DW_TAG_inlined_subroutine
:
10622 case DW_TAG_member
:
10623 case DW_TAG_imported_declaration
:
10626 case DW_TAG_variable
:
10627 case DW_TAG_constant
:
10628 /* We only need to prefix "globally" visible variables. These include
10629 any variable marked with DW_AT_external or any variable that
10630 lives in a namespace. [Variables in anonymous namespaces
10631 require prefixing, but they are not DW_AT_external.] */
10633 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10635 struct dwarf2_cu
*spec_cu
= cu
;
10637 return die_needs_namespace (die_specification (die
, &spec_cu
),
10641 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10642 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10643 && die
->parent
->tag
!= DW_TAG_module
)
10645 /* A variable in a lexical block of some kind does not need a
10646 namespace, even though in C++ such variables may be external
10647 and have a mangled name. */
10648 if (die
->parent
->tag
== DW_TAG_lexical_block
10649 || die
->parent
->tag
== DW_TAG_try_block
10650 || die
->parent
->tag
== DW_TAG_catch_block
10651 || die
->parent
->tag
== DW_TAG_subprogram
)
10660 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10661 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10662 defined for the given DIE. */
10664 static struct attribute
*
10665 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10667 struct attribute
*attr
;
10669 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10671 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10676 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10677 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10678 defined for the given DIE. */
10680 static const char *
10681 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10683 const char *linkage_name
;
10685 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10686 if (linkage_name
== NULL
)
10687 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10689 return linkage_name
;
10692 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10693 compute the physname for the object, which include a method's:
10694 - formal parameters (C++),
10695 - receiver type (Go),
10697 The term "physname" is a bit confusing.
10698 For C++, for example, it is the demangled name.
10699 For Go, for example, it's the mangled name.
10701 For Ada, return the DIE's linkage name rather than the fully qualified
10702 name. PHYSNAME is ignored..
10704 The result is allocated on the objfile_obstack and canonicalized. */
10706 static const char *
10707 dwarf2_compute_name (const char *name
,
10708 struct die_info
*die
, struct dwarf2_cu
*cu
,
10711 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10714 name
= dwarf2_name (die
, cu
);
10716 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10717 but otherwise compute it by typename_concat inside GDB.
10718 FIXME: Actually this is not really true, or at least not always true.
10719 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
10720 Fortran names because there is no mangling standard. So new_symbol
10721 will set the demangled name to the result of dwarf2_full_name, and it is
10722 the demangled name that GDB uses if it exists. */
10723 if (cu
->language
== language_ada
10724 || (cu
->language
== language_fortran
&& physname
))
10726 /* For Ada unit, we prefer the linkage name over the name, as
10727 the former contains the exported name, which the user expects
10728 to be able to reference. Ideally, we want the user to be able
10729 to reference this entity using either natural or linkage name,
10730 but we haven't started looking at this enhancement yet. */
10731 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10733 if (linkage_name
!= NULL
)
10734 return linkage_name
;
10737 /* These are the only languages we know how to qualify names in. */
10739 && (cu
->language
== language_cplus
10740 || cu
->language
== language_fortran
|| cu
->language
== language_d
10741 || cu
->language
== language_rust
))
10743 if (die_needs_namespace (die
, cu
))
10745 const char *prefix
;
10746 const char *canonical_name
= NULL
;
10750 prefix
= determine_prefix (die
, cu
);
10751 if (*prefix
!= '\0')
10753 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
10756 buf
.puts (prefixed_name
);
10757 xfree (prefixed_name
);
10762 /* Template parameters may be specified in the DIE's DW_AT_name, or
10763 as children with DW_TAG_template_type_param or
10764 DW_TAG_value_type_param. If the latter, add them to the name
10765 here. If the name already has template parameters, then
10766 skip this step; some versions of GCC emit both, and
10767 it is more efficient to use the pre-computed name.
10769 Something to keep in mind about this process: it is very
10770 unlikely, or in some cases downright impossible, to produce
10771 something that will match the mangled name of a function.
10772 If the definition of the function has the same debug info,
10773 we should be able to match up with it anyway. But fallbacks
10774 using the minimal symbol, for instance to find a method
10775 implemented in a stripped copy of libstdc++, will not work.
10776 If we do not have debug info for the definition, we will have to
10777 match them up some other way.
10779 When we do name matching there is a related problem with function
10780 templates; two instantiated function templates are allowed to
10781 differ only by their return types, which we do not add here. */
10783 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10785 struct attribute
*attr
;
10786 struct die_info
*child
;
10789 die
->building_fullname
= 1;
10791 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10795 const gdb_byte
*bytes
;
10796 struct dwarf2_locexpr_baton
*baton
;
10799 if (child
->tag
!= DW_TAG_template_type_param
10800 && child
->tag
!= DW_TAG_template_value_param
)
10811 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10814 complaint (&symfile_complaints
,
10815 _("template parameter missing DW_AT_type"));
10816 buf
.puts ("UNKNOWN_TYPE");
10819 type
= die_type (child
, cu
);
10821 if (child
->tag
== DW_TAG_template_type_param
)
10823 c_print_type (type
, "", &buf
, -1, 0, &type_print_raw_options
);
10827 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10830 complaint (&symfile_complaints
,
10831 _("template parameter missing "
10832 "DW_AT_const_value"));
10833 buf
.puts ("UNKNOWN_VALUE");
10837 dwarf2_const_value_attr (attr
, type
, name
,
10838 &cu
->comp_unit_obstack
, cu
,
10839 &value
, &bytes
, &baton
);
10841 if (TYPE_NOSIGN (type
))
10842 /* GDB prints characters as NUMBER 'CHAR'. If that's
10843 changed, this can use value_print instead. */
10844 c_printchar (value
, type
, &buf
);
10847 struct value_print_options opts
;
10850 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10854 else if (bytes
!= NULL
)
10856 v
= allocate_value (type
);
10857 memcpy (value_contents_writeable (v
), bytes
,
10858 TYPE_LENGTH (type
));
10861 v
= value_from_longest (type
, value
);
10863 /* Specify decimal so that we do not depend on
10865 get_formatted_print_options (&opts
, 'd');
10867 value_print (v
, &buf
, &opts
);
10872 die
->building_fullname
= 0;
10876 /* Close the argument list, with a space if necessary
10877 (nested templates). */
10878 if (!buf
.empty () && buf
.string ().back () == '>')
10885 /* For C++ methods, append formal parameter type
10886 information, if PHYSNAME. */
10888 if (physname
&& die
->tag
== DW_TAG_subprogram
10889 && cu
->language
== language_cplus
)
10891 struct type
*type
= read_type_die (die
, cu
);
10893 c_type_print_args (type
, &buf
, 1, cu
->language
,
10894 &type_print_raw_options
);
10896 if (cu
->language
== language_cplus
)
10898 /* Assume that an artificial first parameter is
10899 "this", but do not crash if it is not. RealView
10900 marks unnamed (and thus unused) parameters as
10901 artificial; there is no way to differentiate
10903 if (TYPE_NFIELDS (type
) > 0
10904 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10905 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
10906 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10908 buf
.puts (" const");
10912 const std::string
&intermediate_name
= buf
.string ();
10914 if (cu
->language
== language_cplus
)
10916 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10917 &objfile
->per_bfd
->storage_obstack
);
10919 /* If we only computed INTERMEDIATE_NAME, or if
10920 INTERMEDIATE_NAME is already canonical, then we need to
10921 copy it to the appropriate obstack. */
10922 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10923 name
= ((const char *)
10924 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
10925 intermediate_name
.c_str (),
10926 intermediate_name
.length ()));
10928 name
= canonical_name
;
10935 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10936 If scope qualifiers are appropriate they will be added. The result
10937 will be allocated on the storage_obstack, or NULL if the DIE does
10938 not have a name. NAME may either be from a previous call to
10939 dwarf2_name or NULL.
10941 The output string will be canonicalized (if C++). */
10943 static const char *
10944 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10946 return dwarf2_compute_name (name
, die
, cu
, 0);
10949 /* Construct a physname for the given DIE in CU. NAME may either be
10950 from a previous call to dwarf2_name or NULL. The result will be
10951 allocated on the objfile_objstack or NULL if the DIE does not have a
10954 The output string will be canonicalized (if C++). */
10956 static const char *
10957 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10959 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10960 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10963 /* In this case dwarf2_compute_name is just a shortcut not building anything
10965 if (!die_needs_namespace (die
, cu
))
10966 return dwarf2_compute_name (name
, die
, cu
, 1);
10968 mangled
= dw2_linkage_name (die
, cu
);
10970 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10971 See https://github.com/rust-lang/rust/issues/32925. */
10972 if (cu
->language
== language_rust
&& mangled
!= NULL
10973 && strchr (mangled
, '{') != NULL
)
10976 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
10978 gdb::unique_xmalloc_ptr
<char> demangled
;
10979 if (mangled
!= NULL
)
10982 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
10984 /* Do nothing (do not demangle the symbol name). */
10986 else if (cu
->language
== language_go
)
10988 /* This is a lie, but we already lie to the caller new_symbol.
10989 new_symbol assumes we return the mangled name.
10990 This just undoes that lie until things are cleaned up. */
10994 /* Use DMGL_RET_DROP for C++ template functions to suppress
10995 their return type. It is easier for GDB users to search
10996 for such functions as `name(params)' than `long name(params)'.
10997 In such case the minimal symbol names do not match the full
10998 symbol names but for template functions there is never a need
10999 to look up their definition from their declaration so
11000 the only disadvantage remains the minimal symbol variant
11001 `long name(params)' does not have the proper inferior type. */
11002 demangled
.reset (gdb_demangle (mangled
,
11003 (DMGL_PARAMS
| DMGL_ANSI
11004 | DMGL_RET_DROP
)));
11007 canon
= demangled
.get ();
11015 if (canon
== NULL
|| check_physname
)
11017 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
11019 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
11021 /* It may not mean a bug in GDB. The compiler could also
11022 compute DW_AT_linkage_name incorrectly. But in such case
11023 GDB would need to be bug-to-bug compatible. */
11025 complaint (&symfile_complaints
,
11026 _("Computed physname <%s> does not match demangled <%s> "
11027 "(from linkage <%s>) - DIE at %s [in module %s]"),
11028 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
11029 objfile_name (objfile
));
11031 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
11032 is available here - over computed PHYSNAME. It is safer
11033 against both buggy GDB and buggy compilers. */
11047 retval
= ((const char *)
11048 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
11049 retval
, strlen (retval
)));
11054 /* Inspect DIE in CU for a namespace alias. If one exists, record
11055 a new symbol for it.
11057 Returns 1 if a namespace alias was recorded, 0 otherwise. */
11060 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
11062 struct attribute
*attr
;
11064 /* If the die does not have a name, this is not a namespace
11066 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11070 struct die_info
*d
= die
;
11071 struct dwarf2_cu
*imported_cu
= cu
;
11073 /* If the compiler has nested DW_AT_imported_declaration DIEs,
11074 keep inspecting DIEs until we hit the underlying import. */
11075 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
11076 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
11078 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
11082 d
= follow_die_ref (d
, attr
, &imported_cu
);
11083 if (d
->tag
!= DW_TAG_imported_declaration
)
11087 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
11089 complaint (&symfile_complaints
,
11090 _("DIE at %s has too many recursively imported "
11091 "declarations"), sect_offset_str (d
->sect_off
));
11098 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
11100 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
11101 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
11103 /* This declaration is a global namespace alias. Add
11104 a symbol for it whose type is the aliased namespace. */
11105 new_symbol (die
, type
, cu
);
11114 /* Return the using directives repository (global or local?) to use in the
11115 current context for LANGUAGE.
11117 For Ada, imported declarations can materialize renamings, which *may* be
11118 global. However it is impossible (for now?) in DWARF to distinguish
11119 "external" imported declarations and "static" ones. As all imported
11120 declarations seem to be static in all other languages, make them all CU-wide
11121 global only in Ada. */
11123 static struct using_direct
**
11124 using_directives (enum language language
)
11126 if (language
== language_ada
&& context_stack_depth
== 0)
11127 return &global_using_directives
;
11129 return &local_using_directives
;
11132 /* Read the import statement specified by the given die and record it. */
11135 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
11137 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11138 struct attribute
*import_attr
;
11139 struct die_info
*imported_die
, *child_die
;
11140 struct dwarf2_cu
*imported_cu
;
11141 const char *imported_name
;
11142 const char *imported_name_prefix
;
11143 const char *canonical_name
;
11144 const char *import_alias
;
11145 const char *imported_declaration
= NULL
;
11146 const char *import_prefix
;
11147 std::vector
<const char *> excludes
;
11149 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
11150 if (import_attr
== NULL
)
11152 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
11153 dwarf_tag_name (die
->tag
));
11158 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
11159 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11160 if (imported_name
== NULL
)
11162 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
11164 The import in the following code:
11178 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
11179 <52> DW_AT_decl_file : 1
11180 <53> DW_AT_decl_line : 6
11181 <54> DW_AT_import : <0x75>
11182 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
11183 <59> DW_AT_name : B
11184 <5b> DW_AT_decl_file : 1
11185 <5c> DW_AT_decl_line : 2
11186 <5d> DW_AT_type : <0x6e>
11188 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
11189 <76> DW_AT_byte_size : 4
11190 <77> DW_AT_encoding : 5 (signed)
11192 imports the wrong die ( 0x75 instead of 0x58 ).
11193 This case will be ignored until the gcc bug is fixed. */
11197 /* Figure out the local name after import. */
11198 import_alias
= dwarf2_name (die
, cu
);
11200 /* Figure out where the statement is being imported to. */
11201 import_prefix
= determine_prefix (die
, cu
);
11203 /* Figure out what the scope of the imported die is and prepend it
11204 to the name of the imported die. */
11205 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
11207 if (imported_die
->tag
!= DW_TAG_namespace
11208 && imported_die
->tag
!= DW_TAG_module
)
11210 imported_declaration
= imported_name
;
11211 canonical_name
= imported_name_prefix
;
11213 else if (strlen (imported_name_prefix
) > 0)
11214 canonical_name
= obconcat (&objfile
->objfile_obstack
,
11215 imported_name_prefix
,
11216 (cu
->language
== language_d
? "." : "::"),
11217 imported_name
, (char *) NULL
);
11219 canonical_name
= imported_name
;
11221 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
11222 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11223 child_die
= sibling_die (child_die
))
11225 /* DWARF-4: A Fortran use statement with a “rename list” may be
11226 represented by an imported module entry with an import attribute
11227 referring to the module and owned entries corresponding to those
11228 entities that are renamed as part of being imported. */
11230 if (child_die
->tag
!= DW_TAG_imported_declaration
)
11232 complaint (&symfile_complaints
,
11233 _("child DW_TAG_imported_declaration expected "
11234 "- DIE at %s [in module %s]"),
11235 sect_offset_str (child_die
->sect_off
),
11236 objfile_name (objfile
));
11240 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
11241 if (import_attr
== NULL
)
11243 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
11244 dwarf_tag_name (child_die
->tag
));
11249 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
11251 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11252 if (imported_name
== NULL
)
11254 complaint (&symfile_complaints
,
11255 _("child DW_TAG_imported_declaration has unknown "
11256 "imported name - DIE at %s [in module %s]"),
11257 sect_offset_str (child_die
->sect_off
),
11258 objfile_name (objfile
));
11262 excludes
.push_back (imported_name
);
11264 process_die (child_die
, cu
);
11267 add_using_directive (using_directives (cu
->language
),
11271 imported_declaration
,
11274 &objfile
->objfile_obstack
);
11277 /* ICC<14 does not output the required DW_AT_declaration on incomplete
11278 types, but gives them a size of zero. Starting with version 14,
11279 ICC is compatible with GCC. */
11282 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
11284 if (!cu
->checked_producer
)
11285 check_producer (cu
);
11287 return cu
->producer_is_icc_lt_14
;
11290 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
11291 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
11292 this, it was first present in GCC release 4.3.0. */
11295 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
11297 if (!cu
->checked_producer
)
11298 check_producer (cu
);
11300 return cu
->producer_is_gcc_lt_4_3
;
11303 static file_and_directory
11304 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
11306 file_and_directory res
;
11308 /* Find the filename. Do not use dwarf2_name here, since the filename
11309 is not a source language identifier. */
11310 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
11311 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
11313 if (res
.comp_dir
== NULL
11314 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
11315 && IS_ABSOLUTE_PATH (res
.name
))
11317 res
.comp_dir_storage
= ldirname (res
.name
);
11318 if (!res
.comp_dir_storage
.empty ())
11319 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
11321 if (res
.comp_dir
!= NULL
)
11323 /* Irix 6.2 native cc prepends <machine>.: to the compilation
11324 directory, get rid of it. */
11325 const char *cp
= strchr (res
.comp_dir
, ':');
11327 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
11328 res
.comp_dir
= cp
+ 1;
11331 if (res
.name
== NULL
)
11332 res
.name
= "<unknown>";
11337 /* Handle DW_AT_stmt_list for a compilation unit.
11338 DIE is the DW_TAG_compile_unit die for CU.
11339 COMP_DIR is the compilation directory. LOWPC is passed to
11340 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
11343 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
11344 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
11346 struct dwarf2_per_objfile
*dwarf2_per_objfile
11347 = cu
->per_cu
->dwarf2_per_objfile
;
11348 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11349 struct attribute
*attr
;
11350 struct line_header line_header_local
;
11351 hashval_t line_header_local_hash
;
11353 int decode_mapping
;
11355 gdb_assert (! cu
->per_cu
->is_debug_types
);
11357 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11361 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11363 /* The line header hash table is only created if needed (it exists to
11364 prevent redundant reading of the line table for partial_units).
11365 If we're given a partial_unit, we'll need it. If we're given a
11366 compile_unit, then use the line header hash table if it's already
11367 created, but don't create one just yet. */
11369 if (dwarf2_per_objfile
->line_header_hash
== NULL
11370 && die
->tag
== DW_TAG_partial_unit
)
11372 dwarf2_per_objfile
->line_header_hash
11373 = htab_create_alloc_ex (127, line_header_hash_voidp
,
11374 line_header_eq_voidp
,
11375 free_line_header_voidp
,
11376 &objfile
->objfile_obstack
,
11377 hashtab_obstack_allocate
,
11378 dummy_obstack_deallocate
);
11381 line_header_local
.sect_off
= line_offset
;
11382 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
11383 line_header_local_hash
= line_header_hash (&line_header_local
);
11384 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
11386 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11387 &line_header_local
,
11388 line_header_local_hash
, NO_INSERT
);
11390 /* For DW_TAG_compile_unit we need info like symtab::linetable which
11391 is not present in *SLOT (since if there is something in *SLOT then
11392 it will be for a partial_unit). */
11393 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
11395 gdb_assert (*slot
!= NULL
);
11396 cu
->line_header
= (struct line_header
*) *slot
;
11401 /* dwarf_decode_line_header does not yet provide sufficient information.
11402 We always have to call also dwarf_decode_lines for it. */
11403 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
11407 cu
->line_header
= lh
.release ();
11408 cu
->line_header_die_owner
= die
;
11410 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
11414 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11415 &line_header_local
,
11416 line_header_local_hash
, INSERT
);
11417 gdb_assert (slot
!= NULL
);
11419 if (slot
!= NULL
&& *slot
== NULL
)
11421 /* This newly decoded line number information unit will be owned
11422 by line_header_hash hash table. */
11423 *slot
= cu
->line_header
;
11424 cu
->line_header_die_owner
= NULL
;
11428 /* We cannot free any current entry in (*slot) as that struct line_header
11429 may be already used by multiple CUs. Create only temporary decoded
11430 line_header for this CU - it may happen at most once for each line
11431 number information unit. And if we're not using line_header_hash
11432 then this is what we want as well. */
11433 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
11435 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
11436 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
11441 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
11444 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11446 struct dwarf2_per_objfile
*dwarf2_per_objfile
11447 = cu
->per_cu
->dwarf2_per_objfile
;
11448 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11449 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11450 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
11451 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
11452 struct attribute
*attr
;
11453 struct die_info
*child_die
;
11454 CORE_ADDR baseaddr
;
11456 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11458 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
11460 /* If we didn't find a lowpc, set it to highpc to avoid complaints
11461 from finish_block. */
11462 if (lowpc
== ((CORE_ADDR
) -1))
11464 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11466 file_and_directory fnd
= find_file_and_directory (die
, cu
);
11468 prepare_one_comp_unit (cu
, die
, cu
->language
);
11470 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
11471 standardised yet. As a workaround for the language detection we fall
11472 back to the DW_AT_producer string. */
11473 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
11474 cu
->language
= language_opencl
;
11476 /* Similar hack for Go. */
11477 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
11478 set_cu_language (DW_LANG_Go
, cu
);
11480 dwarf2_start_symtab (cu
, fnd
.name
, fnd
.comp_dir
, lowpc
);
11482 /* Decode line number information if present. We do this before
11483 processing child DIEs, so that the line header table is available
11484 for DW_AT_decl_file. */
11485 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
11487 /* Process all dies in compilation unit. */
11488 if (die
->child
!= NULL
)
11490 child_die
= die
->child
;
11491 while (child_die
&& child_die
->tag
)
11493 process_die (child_die
, cu
);
11494 child_die
= sibling_die (child_die
);
11498 /* Decode macro information, if present. Dwarf 2 macro information
11499 refers to information in the line number info statement program
11500 header, so we can only read it if we've read the header
11502 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11504 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11505 if (attr
&& cu
->line_header
)
11507 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11508 complaint (&symfile_complaints
,
11509 _("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11511 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
11515 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11516 if (attr
&& cu
->line_header
)
11518 unsigned int macro_offset
= DW_UNSND (attr
);
11520 dwarf_decode_macros (cu
, macro_offset
, 0);
11525 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
11526 Create the set of symtabs used by this TU, or if this TU is sharing
11527 symtabs with another TU and the symtabs have already been created
11528 then restore those symtabs in the line header.
11529 We don't need the pc/line-number mapping for type units. */
11532 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
11534 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
11535 struct type_unit_group
*tu_group
;
11537 struct attribute
*attr
;
11539 struct signatured_type
*sig_type
;
11541 gdb_assert (per_cu
->is_debug_types
);
11542 sig_type
= (struct signatured_type
*) per_cu
;
11544 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11546 /* If we're using .gdb_index (includes -readnow) then
11547 per_cu->type_unit_group may not have been set up yet. */
11548 if (sig_type
->type_unit_group
== NULL
)
11549 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
11550 tu_group
= sig_type
->type_unit_group
;
11552 /* If we've already processed this stmt_list there's no real need to
11553 do it again, we could fake it and just recreate the part we need
11554 (file name,index -> symtab mapping). If data shows this optimization
11555 is useful we can do it then. */
11556 first_time
= tu_group
->compunit_symtab
== NULL
;
11558 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11563 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11564 lh
= dwarf_decode_line_header (line_offset
, cu
);
11569 dwarf2_start_symtab (cu
, "", NULL
, 0);
11572 gdb_assert (tu_group
->symtabs
== NULL
);
11573 restart_symtab (tu_group
->compunit_symtab
, "", 0);
11578 cu
->line_header
= lh
.release ();
11579 cu
->line_header_die_owner
= die
;
11583 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
11585 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11586 still initializing it, and our caller (a few levels up)
11587 process_full_type_unit still needs to know if this is the first
11590 tu_group
->num_symtabs
= cu
->line_header
->file_names
.size ();
11591 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
11592 cu
->line_header
->file_names
.size ());
11594 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
11596 file_entry
&fe
= cu
->line_header
->file_names
[i
];
11598 dwarf2_start_subfile (fe
.name
, fe
.include_dir (cu
->line_header
));
11600 if (current_subfile
->symtab
== NULL
)
11602 /* NOTE: start_subfile will recognize when it's been
11603 passed a file it has already seen. So we can't
11604 assume there's a simple mapping from
11605 cu->line_header->file_names to subfiles, plus
11606 cu->line_header->file_names may contain dups. */
11607 current_subfile
->symtab
11608 = allocate_symtab (cust
, current_subfile
->name
);
11611 fe
.symtab
= current_subfile
->symtab
;
11612 tu_group
->symtabs
[i
] = fe
.symtab
;
11617 restart_symtab (tu_group
->compunit_symtab
, "", 0);
11619 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
11621 file_entry
&fe
= cu
->line_header
->file_names
[i
];
11623 fe
.symtab
= tu_group
->symtabs
[i
];
11627 /* The main symtab is allocated last. Type units don't have DW_AT_name
11628 so they don't have a "real" (so to speak) symtab anyway.
11629 There is later code that will assign the main symtab to all symbols
11630 that don't have one. We need to handle the case of a symbol with a
11631 missing symtab (DW_AT_decl_file) anyway. */
11634 /* Process DW_TAG_type_unit.
11635 For TUs we want to skip the first top level sibling if it's not the
11636 actual type being defined by this TU. In this case the first top
11637 level sibling is there to provide context only. */
11640 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11642 struct die_info
*child_die
;
11644 prepare_one_comp_unit (cu
, die
, language_minimal
);
11646 /* Initialize (or reinitialize) the machinery for building symtabs.
11647 We do this before processing child DIEs, so that the line header table
11648 is available for DW_AT_decl_file. */
11649 setup_type_unit_groups (die
, cu
);
11651 if (die
->child
!= NULL
)
11653 child_die
= die
->child
;
11654 while (child_die
&& child_die
->tag
)
11656 process_die (child_die
, cu
);
11657 child_die
= sibling_die (child_die
);
11664 http://gcc.gnu.org/wiki/DebugFission
11665 http://gcc.gnu.org/wiki/DebugFissionDWP
11667 To simplify handling of both DWO files ("object" files with the DWARF info)
11668 and DWP files (a file with the DWOs packaged up into one file), we treat
11669 DWP files as having a collection of virtual DWO files. */
11672 hash_dwo_file (const void *item
)
11674 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11677 hash
= htab_hash_string (dwo_file
->dwo_name
);
11678 if (dwo_file
->comp_dir
!= NULL
)
11679 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11684 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11686 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11687 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11689 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11691 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11692 return lhs
->comp_dir
== rhs
->comp_dir
;
11693 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11696 /* Allocate a hash table for DWO files. */
11699 allocate_dwo_file_hash_table (struct objfile
*objfile
)
11701 return htab_create_alloc_ex (41,
11705 &objfile
->objfile_obstack
,
11706 hashtab_obstack_allocate
,
11707 dummy_obstack_deallocate
);
11710 /* Lookup DWO file DWO_NAME. */
11713 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11714 const char *dwo_name
,
11715 const char *comp_dir
)
11717 struct dwo_file find_entry
;
11720 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11721 dwarf2_per_objfile
->dwo_files
11722 = allocate_dwo_file_hash_table (dwarf2_per_objfile
->objfile
);
11724 memset (&find_entry
, 0, sizeof (find_entry
));
11725 find_entry
.dwo_name
= dwo_name
;
11726 find_entry
.comp_dir
= comp_dir
;
11727 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
11733 hash_dwo_unit (const void *item
)
11735 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11737 /* This drops the top 32 bits of the id, but is ok for a hash. */
11738 return dwo_unit
->signature
;
11742 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11744 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11745 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11747 /* The signature is assumed to be unique within the DWO file.
11748 So while object file CU dwo_id's always have the value zero,
11749 that's OK, assuming each object file DWO file has only one CU,
11750 and that's the rule for now. */
11751 return lhs
->signature
== rhs
->signature
;
11754 /* Allocate a hash table for DWO CUs,TUs.
11755 There is one of these tables for each of CUs,TUs for each DWO file. */
11758 allocate_dwo_unit_table (struct objfile
*objfile
)
11760 /* Start out with a pretty small number.
11761 Generally DWO files contain only one CU and maybe some TUs. */
11762 return htab_create_alloc_ex (3,
11766 &objfile
->objfile_obstack
,
11767 hashtab_obstack_allocate
,
11768 dummy_obstack_deallocate
);
11771 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
11773 struct create_dwo_cu_data
11775 struct dwo_file
*dwo_file
;
11776 struct dwo_unit dwo_unit
;
11779 /* die_reader_func for create_dwo_cu. */
11782 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11783 const gdb_byte
*info_ptr
,
11784 struct die_info
*comp_unit_die
,
11788 struct dwarf2_cu
*cu
= reader
->cu
;
11789 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11790 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11791 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
11792 struct dwo_file
*dwo_file
= data
->dwo_file
;
11793 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
11794 struct attribute
*attr
;
11796 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
11799 complaint (&symfile_complaints
,
11800 _("Dwarf Error: debug entry at offset %s is missing"
11801 " its dwo_id [in module %s]"),
11802 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11806 dwo_unit
->dwo_file
= dwo_file
;
11807 dwo_unit
->signature
= DW_UNSND (attr
);
11808 dwo_unit
->section
= section
;
11809 dwo_unit
->sect_off
= sect_off
;
11810 dwo_unit
->length
= cu
->per_cu
->length
;
11812 if (dwarf_read_debug
)
11813 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11814 sect_offset_str (sect_off
),
11815 hex_string (dwo_unit
->signature
));
11818 /* Create the dwo_units for the CUs in a DWO_FILE.
11819 Note: This function processes DWO files only, not DWP files. */
11822 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11823 struct dwo_file
&dwo_file
, dwarf2_section_info
§ion
,
11826 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11827 const gdb_byte
*info_ptr
, *end_ptr
;
11829 dwarf2_read_section (objfile
, §ion
);
11830 info_ptr
= section
.buffer
;
11832 if (info_ptr
== NULL
)
11835 if (dwarf_read_debug
)
11837 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11838 get_section_name (§ion
),
11839 get_section_file_name (§ion
));
11842 end_ptr
= info_ptr
+ section
.size
;
11843 while (info_ptr
< end_ptr
)
11845 struct dwarf2_per_cu_data per_cu
;
11846 struct create_dwo_cu_data create_dwo_cu_data
;
11847 struct dwo_unit
*dwo_unit
;
11849 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11851 memset (&create_dwo_cu_data
.dwo_unit
, 0,
11852 sizeof (create_dwo_cu_data
.dwo_unit
));
11853 memset (&per_cu
, 0, sizeof (per_cu
));
11854 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11855 per_cu
.is_debug_types
= 0;
11856 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11857 per_cu
.section
= §ion
;
11858 create_dwo_cu_data
.dwo_file
= &dwo_file
;
11860 init_cutu_and_read_dies_no_follow (
11861 &per_cu
, &dwo_file
, create_dwo_cu_reader
, &create_dwo_cu_data
);
11862 info_ptr
+= per_cu
.length
;
11864 // If the unit could not be parsed, skip it.
11865 if (create_dwo_cu_data
.dwo_unit
.dwo_file
== NULL
)
11868 if (cus_htab
== NULL
)
11869 cus_htab
= allocate_dwo_unit_table (objfile
);
11871 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11872 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
11873 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
11874 gdb_assert (slot
!= NULL
);
11877 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11878 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11880 complaint (&symfile_complaints
,
11881 _("debug cu entry at offset %s is duplicate to"
11882 " the entry at offset %s, signature %s"),
11883 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11884 hex_string (dwo_unit
->signature
));
11886 *slot
= (void *)dwo_unit
;
11890 /* DWP file .debug_{cu,tu}_index section format:
11891 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11895 Both index sections have the same format, and serve to map a 64-bit
11896 signature to a set of section numbers. Each section begins with a header,
11897 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11898 indexes, and a pool of 32-bit section numbers. The index sections will be
11899 aligned at 8-byte boundaries in the file.
11901 The index section header consists of:
11903 V, 32 bit version number
11905 N, 32 bit number of compilation units or type units in the index
11906 M, 32 bit number of slots in the hash table
11908 Numbers are recorded using the byte order of the application binary.
11910 The hash table begins at offset 16 in the section, and consists of an array
11911 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11912 order of the application binary). Unused slots in the hash table are 0.
11913 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11915 The parallel table begins immediately after the hash table
11916 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11917 array of 32-bit indexes (using the byte order of the application binary),
11918 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11919 table contains a 32-bit index into the pool of section numbers. For unused
11920 hash table slots, the corresponding entry in the parallel table will be 0.
11922 The pool of section numbers begins immediately following the hash table
11923 (at offset 16 + 12 * M from the beginning of the section). The pool of
11924 section numbers consists of an array of 32-bit words (using the byte order
11925 of the application binary). Each item in the array is indexed starting
11926 from 0. The hash table entry provides the index of the first section
11927 number in the set. Additional section numbers in the set follow, and the
11928 set is terminated by a 0 entry (section number 0 is not used in ELF).
11930 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11931 section must be the first entry in the set, and the .debug_abbrev.dwo must
11932 be the second entry. Other members of the set may follow in any order.
11938 DWP Version 2 combines all the .debug_info, etc. sections into one,
11939 and the entries in the index tables are now offsets into these sections.
11940 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11943 Index Section Contents:
11945 Hash Table of Signatures dwp_hash_table.hash_table
11946 Parallel Table of Indices dwp_hash_table.unit_table
11947 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
11948 Table of Section Sizes dwp_hash_table.v2.sizes
11950 The index section header consists of:
11952 V, 32 bit version number
11953 L, 32 bit number of columns in the table of section offsets
11954 N, 32 bit number of compilation units or type units in the index
11955 M, 32 bit number of slots in the hash table
11957 Numbers are recorded using the byte order of the application binary.
11959 The hash table has the same format as version 1.
11960 The parallel table of indices has the same format as version 1,
11961 except that the entries are origin-1 indices into the table of sections
11962 offsets and the table of section sizes.
11964 The table of offsets begins immediately following the parallel table
11965 (at offset 16 + 12 * M from the beginning of the section). The table is
11966 a two-dimensional array of 32-bit words (using the byte order of the
11967 application binary), with L columns and N+1 rows, in row-major order.
11968 Each row in the array is indexed starting from 0. The first row provides
11969 a key to the remaining rows: each column in this row provides an identifier
11970 for a debug section, and the offsets in the same column of subsequent rows
11971 refer to that section. The section identifiers are:
11973 DW_SECT_INFO 1 .debug_info.dwo
11974 DW_SECT_TYPES 2 .debug_types.dwo
11975 DW_SECT_ABBREV 3 .debug_abbrev.dwo
11976 DW_SECT_LINE 4 .debug_line.dwo
11977 DW_SECT_LOC 5 .debug_loc.dwo
11978 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
11979 DW_SECT_MACINFO 7 .debug_macinfo.dwo
11980 DW_SECT_MACRO 8 .debug_macro.dwo
11982 The offsets provided by the CU and TU index sections are the base offsets
11983 for the contributions made by each CU or TU to the corresponding section
11984 in the package file. Each CU and TU header contains an abbrev_offset
11985 field, used to find the abbreviations table for that CU or TU within the
11986 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
11987 be interpreted as relative to the base offset given in the index section.
11988 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
11989 should be interpreted as relative to the base offset for .debug_line.dwo,
11990 and offsets into other debug sections obtained from DWARF attributes should
11991 also be interpreted as relative to the corresponding base offset.
11993 The table of sizes begins immediately following the table of offsets.
11994 Like the table of offsets, it is a two-dimensional array of 32-bit words,
11995 with L columns and N rows, in row-major order. Each row in the array is
11996 indexed starting from 1 (row 0 is shared by the two tables).
12000 Hash table lookup is handled the same in version 1 and 2:
12002 We assume that N and M will not exceed 2^32 - 1.
12003 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
12005 Given a 64-bit compilation unit signature or a type signature S, an entry
12006 in the hash table is located as follows:
12008 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
12009 the low-order k bits all set to 1.
12011 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
12013 3) If the hash table entry at index H matches the signature, use that
12014 entry. If the hash table entry at index H is unused (all zeroes),
12015 terminate the search: the signature is not present in the table.
12017 4) Let H = (H + H') modulo M. Repeat at Step 3.
12019 Because M > N and H' and M are relatively prime, the search is guaranteed
12020 to stop at an unused slot or find the match. */
12022 /* Create a hash table to map DWO IDs to their CU/TU entry in
12023 .debug_{info,types}.dwo in DWP_FILE.
12024 Returns NULL if there isn't one.
12025 Note: This function processes DWP files only, not DWO files. */
12027 static struct dwp_hash_table
*
12028 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12029 struct dwp_file
*dwp_file
, int is_debug_types
)
12031 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12032 bfd
*dbfd
= dwp_file
->dbfd
;
12033 const gdb_byte
*index_ptr
, *index_end
;
12034 struct dwarf2_section_info
*index
;
12035 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
12036 struct dwp_hash_table
*htab
;
12038 if (is_debug_types
)
12039 index
= &dwp_file
->sections
.tu_index
;
12041 index
= &dwp_file
->sections
.cu_index
;
12043 if (dwarf2_section_empty_p (index
))
12045 dwarf2_read_section (objfile
, index
);
12047 index_ptr
= index
->buffer
;
12048 index_end
= index_ptr
+ index
->size
;
12050 version
= read_4_bytes (dbfd
, index_ptr
);
12053 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
12057 nr_units
= read_4_bytes (dbfd
, index_ptr
);
12059 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
12062 if (version
!= 1 && version
!= 2)
12064 error (_("Dwarf Error: unsupported DWP file version (%s)"
12065 " [in module %s]"),
12066 pulongest (version
), dwp_file
->name
);
12068 if (nr_slots
!= (nr_slots
& -nr_slots
))
12070 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
12071 " is not power of 2 [in module %s]"),
12072 pulongest (nr_slots
), dwp_file
->name
);
12075 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
12076 htab
->version
= version
;
12077 htab
->nr_columns
= nr_columns
;
12078 htab
->nr_units
= nr_units
;
12079 htab
->nr_slots
= nr_slots
;
12080 htab
->hash_table
= index_ptr
;
12081 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
12083 /* Exit early if the table is empty. */
12084 if (nr_slots
== 0 || nr_units
== 0
12085 || (version
== 2 && nr_columns
== 0))
12087 /* All must be zero. */
12088 if (nr_slots
!= 0 || nr_units
!= 0
12089 || (version
== 2 && nr_columns
!= 0))
12091 complaint (&symfile_complaints
,
12092 _("Empty DWP but nr_slots,nr_units,nr_columns not"
12093 " all zero [in modules %s]"),
12101 htab
->section_pool
.v1
.indices
=
12102 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12103 /* It's harder to decide whether the section is too small in v1.
12104 V1 is deprecated anyway so we punt. */
12108 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12109 int *ids
= htab
->section_pool
.v2
.section_ids
;
12110 /* Reverse map for error checking. */
12111 int ids_seen
[DW_SECT_MAX
+ 1];
12114 if (nr_columns
< 2)
12116 error (_("Dwarf Error: bad DWP hash table, too few columns"
12117 " in section table [in module %s]"),
12120 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
12122 error (_("Dwarf Error: bad DWP hash table, too many columns"
12123 " in section table [in module %s]"),
12126 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
12127 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
12128 for (i
= 0; i
< nr_columns
; ++i
)
12130 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
12132 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
12134 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
12135 " in section table [in module %s]"),
12136 id
, dwp_file
->name
);
12138 if (ids_seen
[id
] != -1)
12140 error (_("Dwarf Error: bad DWP hash table, duplicate section"
12141 " id %d in section table [in module %s]"),
12142 id
, dwp_file
->name
);
12147 /* Must have exactly one info or types section. */
12148 if (((ids_seen
[DW_SECT_INFO
] != -1)
12149 + (ids_seen
[DW_SECT_TYPES
] != -1))
12152 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
12153 " DWO info/types section [in module %s]"),
12156 /* Must have an abbrev section. */
12157 if (ids_seen
[DW_SECT_ABBREV
] == -1)
12159 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
12160 " section [in module %s]"),
12163 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
12164 htab
->section_pool
.v2
.sizes
=
12165 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
12166 * nr_units
* nr_columns
);
12167 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
12168 * nr_units
* nr_columns
))
12171 error (_("Dwarf Error: DWP index section is corrupt (too small)"
12172 " [in module %s]"),
12180 /* Update SECTIONS with the data from SECTP.
12182 This function is like the other "locate" section routines that are
12183 passed to bfd_map_over_sections, but in this context the sections to
12184 read comes from the DWP V1 hash table, not the full ELF section table.
12186 The result is non-zero for success, or zero if an error was found. */
12189 locate_v1_virtual_dwo_sections (asection
*sectp
,
12190 struct virtual_v1_dwo_sections
*sections
)
12192 const struct dwop_section_names
*names
= &dwop_section_names
;
12194 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12196 /* There can be only one. */
12197 if (sections
->abbrev
.s
.section
!= NULL
)
12199 sections
->abbrev
.s
.section
= sectp
;
12200 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12202 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
12203 || section_is_p (sectp
->name
, &names
->types_dwo
))
12205 /* There can be only one. */
12206 if (sections
->info_or_types
.s
.section
!= NULL
)
12208 sections
->info_or_types
.s
.section
= sectp
;
12209 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
12211 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12213 /* There can be only one. */
12214 if (sections
->line
.s
.section
!= NULL
)
12216 sections
->line
.s
.section
= sectp
;
12217 sections
->line
.size
= bfd_get_section_size (sectp
);
12219 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12221 /* There can be only one. */
12222 if (sections
->loc
.s
.section
!= NULL
)
12224 sections
->loc
.s
.section
= sectp
;
12225 sections
->loc
.size
= bfd_get_section_size (sectp
);
12227 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12229 /* There can be only one. */
12230 if (sections
->macinfo
.s
.section
!= NULL
)
12232 sections
->macinfo
.s
.section
= sectp
;
12233 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12235 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12237 /* There can be only one. */
12238 if (sections
->macro
.s
.section
!= NULL
)
12240 sections
->macro
.s
.section
= sectp
;
12241 sections
->macro
.size
= bfd_get_section_size (sectp
);
12243 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12245 /* There can be only one. */
12246 if (sections
->str_offsets
.s
.section
!= NULL
)
12248 sections
->str_offsets
.s
.section
= sectp
;
12249 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12253 /* No other kind of section is valid. */
12260 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12261 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12262 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12263 This is for DWP version 1 files. */
12265 static struct dwo_unit
*
12266 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12267 struct dwp_file
*dwp_file
,
12268 uint32_t unit_index
,
12269 const char *comp_dir
,
12270 ULONGEST signature
, int is_debug_types
)
12272 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12273 const struct dwp_hash_table
*dwp_htab
=
12274 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12275 bfd
*dbfd
= dwp_file
->dbfd
;
12276 const char *kind
= is_debug_types
? "TU" : "CU";
12277 struct dwo_file
*dwo_file
;
12278 struct dwo_unit
*dwo_unit
;
12279 struct virtual_v1_dwo_sections sections
;
12280 void **dwo_file_slot
;
12283 gdb_assert (dwp_file
->version
== 1);
12285 if (dwarf_read_debug
)
12287 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
12289 pulongest (unit_index
), hex_string (signature
),
12293 /* Fetch the sections of this DWO unit.
12294 Put a limit on the number of sections we look for so that bad data
12295 doesn't cause us to loop forever. */
12297 #define MAX_NR_V1_DWO_SECTIONS \
12298 (1 /* .debug_info or .debug_types */ \
12299 + 1 /* .debug_abbrev */ \
12300 + 1 /* .debug_line */ \
12301 + 1 /* .debug_loc */ \
12302 + 1 /* .debug_str_offsets */ \
12303 + 1 /* .debug_macro or .debug_macinfo */ \
12304 + 1 /* trailing zero */)
12306 memset (§ions
, 0, sizeof (sections
));
12308 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
12311 uint32_t section_nr
=
12312 read_4_bytes (dbfd
,
12313 dwp_htab
->section_pool
.v1
.indices
12314 + (unit_index
+ i
) * sizeof (uint32_t));
12316 if (section_nr
== 0)
12318 if (section_nr
>= dwp_file
->num_sections
)
12320 error (_("Dwarf Error: bad DWP hash table, section number too large"
12321 " [in module %s]"),
12325 sectp
= dwp_file
->elf_sections
[section_nr
];
12326 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
12328 error (_("Dwarf Error: bad DWP hash table, invalid section found"
12329 " [in module %s]"),
12335 || dwarf2_section_empty_p (§ions
.info_or_types
)
12336 || dwarf2_section_empty_p (§ions
.abbrev
))
12338 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
12339 " [in module %s]"),
12342 if (i
== MAX_NR_V1_DWO_SECTIONS
)
12344 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
12345 " [in module %s]"),
12349 /* It's easier for the rest of the code if we fake a struct dwo_file and
12350 have dwo_unit "live" in that. At least for now.
12352 The DWP file can be made up of a random collection of CUs and TUs.
12353 However, for each CU + set of TUs that came from the same original DWO
12354 file, we can combine them back into a virtual DWO file to save space
12355 (fewer struct dwo_file objects to allocate). Remember that for really
12356 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12358 std::string virtual_dwo_name
=
12359 string_printf ("virtual-dwo/%d-%d-%d-%d",
12360 get_section_id (§ions
.abbrev
),
12361 get_section_id (§ions
.line
),
12362 get_section_id (§ions
.loc
),
12363 get_section_id (§ions
.str_offsets
));
12364 /* Can we use an existing virtual DWO file? */
12365 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12366 virtual_dwo_name
.c_str (),
12368 /* Create one if necessary. */
12369 if (*dwo_file_slot
== NULL
)
12371 if (dwarf_read_debug
)
12373 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12374 virtual_dwo_name
.c_str ());
12376 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12378 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12379 virtual_dwo_name
.c_str (),
12380 virtual_dwo_name
.size ());
12381 dwo_file
->comp_dir
= comp_dir
;
12382 dwo_file
->sections
.abbrev
= sections
.abbrev
;
12383 dwo_file
->sections
.line
= sections
.line
;
12384 dwo_file
->sections
.loc
= sections
.loc
;
12385 dwo_file
->sections
.macinfo
= sections
.macinfo
;
12386 dwo_file
->sections
.macro
= sections
.macro
;
12387 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
12388 /* The "str" section is global to the entire DWP file. */
12389 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12390 /* The info or types section is assigned below to dwo_unit,
12391 there's no need to record it in dwo_file.
12392 Also, we can't simply record type sections in dwo_file because
12393 we record a pointer into the vector in dwo_unit. As we collect more
12394 types we'll grow the vector and eventually have to reallocate space
12395 for it, invalidating all copies of pointers into the previous
12397 *dwo_file_slot
= dwo_file
;
12401 if (dwarf_read_debug
)
12403 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12404 virtual_dwo_name
.c_str ());
12406 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12409 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12410 dwo_unit
->dwo_file
= dwo_file
;
12411 dwo_unit
->signature
= signature
;
12412 dwo_unit
->section
=
12413 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12414 *dwo_unit
->section
= sections
.info_or_types
;
12415 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12420 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
12421 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
12422 piece within that section used by a TU/CU, return a virtual section
12423 of just that piece. */
12425 static struct dwarf2_section_info
12426 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12427 struct dwarf2_section_info
*section
,
12428 bfd_size_type offset
, bfd_size_type size
)
12430 struct dwarf2_section_info result
;
12433 gdb_assert (section
!= NULL
);
12434 gdb_assert (!section
->is_virtual
);
12436 memset (&result
, 0, sizeof (result
));
12437 result
.s
.containing_section
= section
;
12438 result
.is_virtual
= 1;
12443 sectp
= get_section_bfd_section (section
);
12445 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
12446 bounds of the real section. This is a pretty-rare event, so just
12447 flag an error (easier) instead of a warning and trying to cope. */
12449 || offset
+ size
> bfd_get_section_size (sectp
))
12451 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
12452 " in section %s [in module %s]"),
12453 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
12454 objfile_name (dwarf2_per_objfile
->objfile
));
12457 result
.virtual_offset
= offset
;
12458 result
.size
= size
;
12462 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12463 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12464 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12465 This is for DWP version 2 files. */
12467 static struct dwo_unit
*
12468 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12469 struct dwp_file
*dwp_file
,
12470 uint32_t unit_index
,
12471 const char *comp_dir
,
12472 ULONGEST signature
, int is_debug_types
)
12474 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12475 const struct dwp_hash_table
*dwp_htab
=
12476 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12477 bfd
*dbfd
= dwp_file
->dbfd
;
12478 const char *kind
= is_debug_types
? "TU" : "CU";
12479 struct dwo_file
*dwo_file
;
12480 struct dwo_unit
*dwo_unit
;
12481 struct virtual_v2_dwo_sections sections
;
12482 void **dwo_file_slot
;
12485 gdb_assert (dwp_file
->version
== 2);
12487 if (dwarf_read_debug
)
12489 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
12491 pulongest (unit_index
), hex_string (signature
),
12495 /* Fetch the section offsets of this DWO unit. */
12497 memset (§ions
, 0, sizeof (sections
));
12499 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12501 uint32_t offset
= read_4_bytes (dbfd
,
12502 dwp_htab
->section_pool
.v2
.offsets
12503 + (((unit_index
- 1) * dwp_htab
->nr_columns
12505 * sizeof (uint32_t)));
12506 uint32_t size
= read_4_bytes (dbfd
,
12507 dwp_htab
->section_pool
.v2
.sizes
12508 + (((unit_index
- 1) * dwp_htab
->nr_columns
12510 * sizeof (uint32_t)));
12512 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12515 case DW_SECT_TYPES
:
12516 sections
.info_or_types_offset
= offset
;
12517 sections
.info_or_types_size
= size
;
12519 case DW_SECT_ABBREV
:
12520 sections
.abbrev_offset
= offset
;
12521 sections
.abbrev_size
= size
;
12524 sections
.line_offset
= offset
;
12525 sections
.line_size
= size
;
12528 sections
.loc_offset
= offset
;
12529 sections
.loc_size
= size
;
12531 case DW_SECT_STR_OFFSETS
:
12532 sections
.str_offsets_offset
= offset
;
12533 sections
.str_offsets_size
= size
;
12535 case DW_SECT_MACINFO
:
12536 sections
.macinfo_offset
= offset
;
12537 sections
.macinfo_size
= size
;
12539 case DW_SECT_MACRO
:
12540 sections
.macro_offset
= offset
;
12541 sections
.macro_size
= size
;
12546 /* It's easier for the rest of the code if we fake a struct dwo_file and
12547 have dwo_unit "live" in that. At least for now.
12549 The DWP file can be made up of a random collection of CUs and TUs.
12550 However, for each CU + set of TUs that came from the same original DWO
12551 file, we can combine them back into a virtual DWO file to save space
12552 (fewer struct dwo_file objects to allocate). Remember that for really
12553 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12555 std::string virtual_dwo_name
=
12556 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12557 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12558 (long) (sections
.line_size
? sections
.line_offset
: 0),
12559 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12560 (long) (sections
.str_offsets_size
12561 ? sections
.str_offsets_offset
: 0));
12562 /* Can we use an existing virtual DWO file? */
12563 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12564 virtual_dwo_name
.c_str (),
12566 /* Create one if necessary. */
12567 if (*dwo_file_slot
== NULL
)
12569 if (dwarf_read_debug
)
12571 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12572 virtual_dwo_name
.c_str ());
12574 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12576 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12577 virtual_dwo_name
.c_str (),
12578 virtual_dwo_name
.size ());
12579 dwo_file
->comp_dir
= comp_dir
;
12580 dwo_file
->sections
.abbrev
=
12581 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
12582 sections
.abbrev_offset
, sections
.abbrev_size
);
12583 dwo_file
->sections
.line
=
12584 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
12585 sections
.line_offset
, sections
.line_size
);
12586 dwo_file
->sections
.loc
=
12587 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12588 sections
.loc_offset
, sections
.loc_size
);
12589 dwo_file
->sections
.macinfo
=
12590 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12591 sections
.macinfo_offset
, sections
.macinfo_size
);
12592 dwo_file
->sections
.macro
=
12593 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12594 sections
.macro_offset
, sections
.macro_size
);
12595 dwo_file
->sections
.str_offsets
=
12596 create_dwp_v2_section (dwarf2_per_objfile
,
12597 &dwp_file
->sections
.str_offsets
,
12598 sections
.str_offsets_offset
,
12599 sections
.str_offsets_size
);
12600 /* The "str" section is global to the entire DWP file. */
12601 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12602 /* The info or types section is assigned below to dwo_unit,
12603 there's no need to record it in dwo_file.
12604 Also, we can't simply record type sections in dwo_file because
12605 we record a pointer into the vector in dwo_unit. As we collect more
12606 types we'll grow the vector and eventually have to reallocate space
12607 for it, invalidating all copies of pointers into the previous
12609 *dwo_file_slot
= dwo_file
;
12613 if (dwarf_read_debug
)
12615 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12616 virtual_dwo_name
.c_str ());
12618 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12621 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12622 dwo_unit
->dwo_file
= dwo_file
;
12623 dwo_unit
->signature
= signature
;
12624 dwo_unit
->section
=
12625 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12626 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12628 ? &dwp_file
->sections
.types
12629 : &dwp_file
->sections
.info
,
12630 sections
.info_or_types_offset
,
12631 sections
.info_or_types_size
);
12632 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12637 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12638 Returns NULL if the signature isn't found. */
12640 static struct dwo_unit
*
12641 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12642 struct dwp_file
*dwp_file
, const char *comp_dir
,
12643 ULONGEST signature
, int is_debug_types
)
12645 const struct dwp_hash_table
*dwp_htab
=
12646 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12647 bfd
*dbfd
= dwp_file
->dbfd
;
12648 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12649 uint32_t hash
= signature
& mask
;
12650 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12653 struct dwo_unit find_dwo_cu
;
12655 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12656 find_dwo_cu
.signature
= signature
;
12657 slot
= htab_find_slot (is_debug_types
12658 ? dwp_file
->loaded_tus
12659 : dwp_file
->loaded_cus
,
12660 &find_dwo_cu
, INSERT
);
12663 return (struct dwo_unit
*) *slot
;
12665 /* Use a for loop so that we don't loop forever on bad debug info. */
12666 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12668 ULONGEST signature_in_table
;
12670 signature_in_table
=
12671 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12672 if (signature_in_table
== signature
)
12674 uint32_t unit_index
=
12675 read_4_bytes (dbfd
,
12676 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12678 if (dwp_file
->version
== 1)
12680 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12681 dwp_file
, unit_index
,
12682 comp_dir
, signature
,
12687 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12688 dwp_file
, unit_index
,
12689 comp_dir
, signature
,
12692 return (struct dwo_unit
*) *slot
;
12694 if (signature_in_table
== 0)
12696 hash
= (hash
+ hash2
) & mask
;
12699 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12700 " [in module %s]"),
12704 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12705 Open the file specified by FILE_NAME and hand it off to BFD for
12706 preliminary analysis. Return a newly initialized bfd *, which
12707 includes a canonicalized copy of FILE_NAME.
12708 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12709 SEARCH_CWD is true if the current directory is to be searched.
12710 It will be searched before debug-file-directory.
12711 If successful, the file is added to the bfd include table of the
12712 objfile's bfd (see gdb_bfd_record_inclusion).
12713 If unable to find/open the file, return NULL.
12714 NOTE: This function is derived from symfile_bfd_open. */
12716 static gdb_bfd_ref_ptr
12717 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12718 const char *file_name
, int is_dwp
, int search_cwd
)
12721 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12722 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12723 to debug_file_directory. */
12724 const char *search_path
;
12725 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12727 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12730 if (*debug_file_directory
!= '\0')
12732 search_path_holder
.reset (concat (".", dirname_separator_string
,
12733 debug_file_directory
,
12735 search_path
= search_path_holder
.get ();
12741 search_path
= debug_file_directory
;
12743 openp_flags flags
= OPF_RETURN_REALPATH
;
12745 flags
|= OPF_SEARCH_IN_PATH
;
12747 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12748 desc
= openp (search_path
, flags
, file_name
,
12749 O_RDONLY
| O_BINARY
, &absolute_name
);
12753 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12755 if (sym_bfd
== NULL
)
12757 bfd_set_cacheable (sym_bfd
.get (), 1);
12759 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12762 /* Success. Record the bfd as having been included by the objfile's bfd.
12763 This is important because things like demangled_names_hash lives in the
12764 objfile's per_bfd space and may have references to things like symbol
12765 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12766 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12771 /* Try to open DWO file FILE_NAME.
12772 COMP_DIR is the DW_AT_comp_dir attribute.
12773 The result is the bfd handle of the file.
12774 If there is a problem finding or opening the file, return NULL.
12775 Upon success, the canonicalized path of the file is stored in the bfd,
12776 same as symfile_bfd_open. */
12778 static gdb_bfd_ref_ptr
12779 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12780 const char *file_name
, const char *comp_dir
)
12782 if (IS_ABSOLUTE_PATH (file_name
))
12783 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12784 0 /*is_dwp*/, 0 /*search_cwd*/);
12786 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12788 if (comp_dir
!= NULL
)
12790 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
12791 file_name
, (char *) NULL
);
12793 /* NOTE: If comp_dir is a relative path, this will also try the
12794 search path, which seems useful. */
12795 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12798 1 /*search_cwd*/));
12799 xfree (path_to_try
);
12804 /* That didn't work, try debug-file-directory, which, despite its name,
12805 is a list of paths. */
12807 if (*debug_file_directory
== '\0')
12810 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12811 0 /*is_dwp*/, 1 /*search_cwd*/);
12814 /* This function is mapped across the sections and remembers the offset and
12815 size of each of the DWO debugging sections we are interested in. */
12818 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12820 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12821 const struct dwop_section_names
*names
= &dwop_section_names
;
12823 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12825 dwo_sections
->abbrev
.s
.section
= sectp
;
12826 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12828 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12830 dwo_sections
->info
.s
.section
= sectp
;
12831 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
12833 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12835 dwo_sections
->line
.s
.section
= sectp
;
12836 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
12838 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12840 dwo_sections
->loc
.s
.section
= sectp
;
12841 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
12843 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12845 dwo_sections
->macinfo
.s
.section
= sectp
;
12846 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12848 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12850 dwo_sections
->macro
.s
.section
= sectp
;
12851 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
12853 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12855 dwo_sections
->str
.s
.section
= sectp
;
12856 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
12858 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12860 dwo_sections
->str_offsets
.s
.section
= sectp
;
12861 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12863 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12865 struct dwarf2_section_info type_section
;
12867 memset (&type_section
, 0, sizeof (type_section
));
12868 type_section
.s
.section
= sectp
;
12869 type_section
.size
= bfd_get_section_size (sectp
);
12870 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
12875 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12876 by PER_CU. This is for the non-DWP case.
12877 The result is NULL if DWO_NAME can't be found. */
12879 static struct dwo_file
*
12880 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12881 const char *dwo_name
, const char *comp_dir
)
12883 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12884 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12886 gdb_bfd_ref_ptr
dbfd (open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
));
12889 if (dwarf_read_debug
)
12890 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12894 /* We use a unique pointer here, despite the obstack allocation,
12895 because a dwo_file needs some cleanup if it is abandoned. */
12896 dwo_file_up
dwo_file (OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
12898 dwo_file
->dwo_name
= dwo_name
;
12899 dwo_file
->comp_dir
= comp_dir
;
12900 dwo_file
->dbfd
= dbfd
.release ();
12902 bfd_map_over_sections (dwo_file
->dbfd
, dwarf2_locate_dwo_sections
,
12903 &dwo_file
->sections
);
12905 create_cus_hash_table (dwarf2_per_objfile
, *dwo_file
, dwo_file
->sections
.info
,
12908 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
12909 dwo_file
->sections
.types
, dwo_file
->tus
);
12911 if (dwarf_read_debug
)
12912 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
12914 return dwo_file
.release ();
12917 /* This function is mapped across the sections and remembers the offset and
12918 size of each of the DWP debugging sections common to version 1 and 2 that
12919 we are interested in. */
12922 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12923 void *dwp_file_ptr
)
12925 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12926 const struct dwop_section_names
*names
= &dwop_section_names
;
12927 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12929 /* Record the ELF section number for later lookup: this is what the
12930 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12931 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12932 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12934 /* Look for specific sections that we need. */
12935 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12937 dwp_file
->sections
.str
.s
.section
= sectp
;
12938 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
12940 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12942 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12943 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
12945 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12947 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12948 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
12952 /* This function is mapped across the sections and remembers the offset and
12953 size of each of the DWP version 2 debugging sections that we are interested
12954 in. This is split into a separate function because we don't know if we
12955 have version 1 or 2 until we parse the cu_index/tu_index sections. */
12958 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12960 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12961 const struct dwop_section_names
*names
= &dwop_section_names
;
12962 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12964 /* Record the ELF section number for later lookup: this is what the
12965 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12966 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12967 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12969 /* Look for specific sections that we need. */
12970 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12972 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12973 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
12975 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12977 dwp_file
->sections
.info
.s
.section
= sectp
;
12978 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
12980 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12982 dwp_file
->sections
.line
.s
.section
= sectp
;
12983 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
12985 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12987 dwp_file
->sections
.loc
.s
.section
= sectp
;
12988 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
12990 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12992 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
12993 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
12995 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12997 dwp_file
->sections
.macro
.s
.section
= sectp
;
12998 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
13000 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
13002 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
13003 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
13005 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
13007 dwp_file
->sections
.types
.s
.section
= sectp
;
13008 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
13012 /* Hash function for dwp_file loaded CUs/TUs. */
13015 hash_dwp_loaded_cutus (const void *item
)
13017 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
13019 /* This drops the top 32 bits of the signature, but is ok for a hash. */
13020 return dwo_unit
->signature
;
13023 /* Equality function for dwp_file loaded CUs/TUs. */
13026 eq_dwp_loaded_cutus (const void *a
, const void *b
)
13028 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
13029 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
13031 return dua
->signature
== dub
->signature
;
13034 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
13037 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
13039 return htab_create_alloc_ex (3,
13040 hash_dwp_loaded_cutus
,
13041 eq_dwp_loaded_cutus
,
13043 &objfile
->objfile_obstack
,
13044 hashtab_obstack_allocate
,
13045 dummy_obstack_deallocate
);
13048 /* Try to open DWP file FILE_NAME.
13049 The result is the bfd handle of the file.
13050 If there is a problem finding or opening the file, return NULL.
13051 Upon success, the canonicalized path of the file is stored in the bfd,
13052 same as symfile_bfd_open. */
13054 static gdb_bfd_ref_ptr
13055 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
13056 const char *file_name
)
13058 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
13060 1 /*search_cwd*/));
13064 /* Work around upstream bug 15652.
13065 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
13066 [Whether that's a "bug" is debatable, but it is getting in our way.]
13067 We have no real idea where the dwp file is, because gdb's realpath-ing
13068 of the executable's path may have discarded the needed info.
13069 [IWBN if the dwp file name was recorded in the executable, akin to
13070 .gnu_debuglink, but that doesn't exist yet.]
13071 Strip the directory from FILE_NAME and search again. */
13072 if (*debug_file_directory
!= '\0')
13074 /* Don't implicitly search the current directory here.
13075 If the user wants to search "." to handle this case,
13076 it must be added to debug-file-directory. */
13077 return try_open_dwop_file (dwarf2_per_objfile
,
13078 lbasename (file_name
), 1 /*is_dwp*/,
13085 /* Initialize the use of the DWP file for the current objfile.
13086 By convention the name of the DWP file is ${objfile}.dwp.
13087 The result is NULL if it can't be found. */
13089 static struct dwp_file
*
13090 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13092 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13093 struct dwp_file
*dwp_file
;
13095 /* Try to find first .dwp for the binary file before any symbolic links
13098 /* If the objfile is a debug file, find the name of the real binary
13099 file and get the name of dwp file from there. */
13100 std::string dwp_name
;
13101 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
13103 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
13104 const char *backlink_basename
= lbasename (backlink
->original_name
);
13106 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
13109 dwp_name
= objfile
->original_name
;
13111 dwp_name
+= ".dwp";
13113 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
13115 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
13117 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
13118 dwp_name
= objfile_name (objfile
);
13119 dwp_name
+= ".dwp";
13120 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
13125 if (dwarf_read_debug
)
13126 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
13129 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
13130 dwp_file
->name
= bfd_get_filename (dbfd
.get ());
13131 dwp_file
->dbfd
= dbfd
.release ();
13133 /* +1: section 0 is unused */
13134 dwp_file
->num_sections
= bfd_count_sections (dwp_file
->dbfd
) + 1;
13135 dwp_file
->elf_sections
=
13136 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
13137 dwp_file
->num_sections
, asection
*);
13139 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_common_dwp_sections
,
13142 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
, 0);
13144 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
, 1);
13146 /* The DWP file version is stored in the hash table. Oh well. */
13147 if (dwp_file
->cus
&& dwp_file
->tus
13148 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
13150 /* Technically speaking, we should try to limp along, but this is
13151 pretty bizarre. We use pulongest here because that's the established
13152 portability solution (e.g, we cannot use %u for uint32_t). */
13153 error (_("Dwarf Error: DWP file CU version %s doesn't match"
13154 " TU version %s [in DWP file %s]"),
13155 pulongest (dwp_file
->cus
->version
),
13156 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
13160 dwp_file
->version
= dwp_file
->cus
->version
;
13161 else if (dwp_file
->tus
)
13162 dwp_file
->version
= dwp_file
->tus
->version
;
13164 dwp_file
->version
= 2;
13166 if (dwp_file
->version
== 2)
13167 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_v2_dwp_sections
,
13170 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
13171 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
13173 if (dwarf_read_debug
)
13175 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
13176 fprintf_unfiltered (gdb_stdlog
,
13177 " %s CUs, %s TUs\n",
13178 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
13179 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
13185 /* Wrapper around open_and_init_dwp_file, only open it once. */
13187 static struct dwp_file
*
13188 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13190 if (! dwarf2_per_objfile
->dwp_checked
)
13192 dwarf2_per_objfile
->dwp_file
13193 = open_and_init_dwp_file (dwarf2_per_objfile
);
13194 dwarf2_per_objfile
->dwp_checked
= 1;
13196 return dwarf2_per_objfile
->dwp_file
;
13199 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
13200 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
13201 or in the DWP file for the objfile, referenced by THIS_UNIT.
13202 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
13203 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
13205 This is called, for example, when wanting to read a variable with a
13206 complex location. Therefore we don't want to do file i/o for every call.
13207 Therefore we don't want to look for a DWO file on every call.
13208 Therefore we first see if we've already seen SIGNATURE in a DWP file,
13209 then we check if we've already seen DWO_NAME, and only THEN do we check
13212 The result is a pointer to the dwo_unit object or NULL if we didn't find it
13213 (dwo_id mismatch or couldn't find the DWO/DWP file). */
13215 static struct dwo_unit
*
13216 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
13217 const char *dwo_name
, const char *comp_dir
,
13218 ULONGEST signature
, int is_debug_types
)
13220 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
13221 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13222 const char *kind
= is_debug_types
? "TU" : "CU";
13223 void **dwo_file_slot
;
13224 struct dwo_file
*dwo_file
;
13225 struct dwp_file
*dwp_file
;
13227 /* First see if there's a DWP file.
13228 If we have a DWP file but didn't find the DWO inside it, don't
13229 look for the original DWO file. It makes gdb behave differently
13230 depending on whether one is debugging in the build tree. */
13232 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
13233 if (dwp_file
!= NULL
)
13235 const struct dwp_hash_table
*dwp_htab
=
13236 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
13238 if (dwp_htab
!= NULL
)
13240 struct dwo_unit
*dwo_cutu
=
13241 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
13242 signature
, is_debug_types
);
13244 if (dwo_cutu
!= NULL
)
13246 if (dwarf_read_debug
)
13248 fprintf_unfiltered (gdb_stdlog
,
13249 "Virtual DWO %s %s found: @%s\n",
13250 kind
, hex_string (signature
),
13251 host_address_to_string (dwo_cutu
));
13259 /* No DWP file, look for the DWO file. */
13261 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
13262 dwo_name
, comp_dir
);
13263 if (*dwo_file_slot
== NULL
)
13265 /* Read in the file and build a table of the CUs/TUs it contains. */
13266 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
13268 /* NOTE: This will be NULL if unable to open the file. */
13269 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
13271 if (dwo_file
!= NULL
)
13273 struct dwo_unit
*dwo_cutu
= NULL
;
13275 if (is_debug_types
&& dwo_file
->tus
)
13277 struct dwo_unit find_dwo_cutu
;
13279 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13280 find_dwo_cutu
.signature
= signature
;
13282 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
13284 else if (!is_debug_types
&& dwo_file
->cus
)
13286 struct dwo_unit find_dwo_cutu
;
13288 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13289 find_dwo_cutu
.signature
= signature
;
13290 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
13294 if (dwo_cutu
!= NULL
)
13296 if (dwarf_read_debug
)
13298 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
13299 kind
, dwo_name
, hex_string (signature
),
13300 host_address_to_string (dwo_cutu
));
13307 /* We didn't find it. This could mean a dwo_id mismatch, or
13308 someone deleted the DWO/DWP file, or the search path isn't set up
13309 correctly to find the file. */
13311 if (dwarf_read_debug
)
13313 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
13314 kind
, dwo_name
, hex_string (signature
));
13317 /* This is a warning and not a complaint because it can be caused by
13318 pilot error (e.g., user accidentally deleting the DWO). */
13320 /* Print the name of the DWP file if we looked there, helps the user
13321 better diagnose the problem. */
13322 std::string dwp_text
;
13324 if (dwp_file
!= NULL
)
13325 dwp_text
= string_printf (" [in DWP file %s]",
13326 lbasename (dwp_file
->name
));
13328 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
13329 " [in module %s]"),
13330 kind
, dwo_name
, hex_string (signature
),
13332 this_unit
->is_debug_types
? "TU" : "CU",
13333 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
13338 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
13339 See lookup_dwo_cutu_unit for details. */
13341 static struct dwo_unit
*
13342 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
13343 const char *dwo_name
, const char *comp_dir
,
13344 ULONGEST signature
)
13346 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
13349 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
13350 See lookup_dwo_cutu_unit for details. */
13352 static struct dwo_unit
*
13353 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
13354 const char *dwo_name
, const char *comp_dir
)
13356 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
13359 /* Traversal function for queue_and_load_all_dwo_tus. */
13362 queue_and_load_dwo_tu (void **slot
, void *info
)
13364 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
13365 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
13366 ULONGEST signature
= dwo_unit
->signature
;
13367 struct signatured_type
*sig_type
=
13368 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
13370 if (sig_type
!= NULL
)
13372 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
13374 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
13375 a real dependency of PER_CU on SIG_TYPE. That is detected later
13376 while processing PER_CU. */
13377 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
13378 load_full_type_unit (sig_cu
);
13379 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
13385 /* Queue all TUs contained in the DWO of PER_CU to be read in.
13386 The DWO may have the only definition of the type, though it may not be
13387 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
13388 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
13391 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
13393 struct dwo_unit
*dwo_unit
;
13394 struct dwo_file
*dwo_file
;
13396 gdb_assert (!per_cu
->is_debug_types
);
13397 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
13398 gdb_assert (per_cu
->cu
!= NULL
);
13400 dwo_unit
= per_cu
->cu
->dwo_unit
;
13401 gdb_assert (dwo_unit
!= NULL
);
13403 dwo_file
= dwo_unit
->dwo_file
;
13404 if (dwo_file
->tus
!= NULL
)
13405 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
13408 /* Free all resources associated with DWO_FILE.
13409 Close the DWO file and munmap the sections. */
13412 free_dwo_file (struct dwo_file
*dwo_file
)
13414 /* Note: dbfd is NULL for virtual DWO files. */
13415 gdb_bfd_unref (dwo_file
->dbfd
);
13417 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
13420 /* Traversal function for free_dwo_files. */
13423 free_dwo_file_from_slot (void **slot
, void *info
)
13425 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
13427 free_dwo_file (dwo_file
);
13432 /* Free all resources associated with DWO_FILES. */
13435 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
13437 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
13440 /* Read in various DIEs. */
13442 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
13443 Inherit only the children of the DW_AT_abstract_origin DIE not being
13444 already referenced by DW_AT_abstract_origin from the children of the
13448 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
13450 struct die_info
*child_die
;
13451 sect_offset
*offsetp
;
13452 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
13453 struct die_info
*origin_die
;
13454 /* Iterator of the ORIGIN_DIE children. */
13455 struct die_info
*origin_child_die
;
13456 struct attribute
*attr
;
13457 struct dwarf2_cu
*origin_cu
;
13458 struct pending
**origin_previous_list_in_scope
;
13460 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13464 /* Note that following die references may follow to a die in a
13468 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
13470 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
13472 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
13473 origin_cu
->list_in_scope
= cu
->list_in_scope
;
13475 if (die
->tag
!= origin_die
->tag
13476 && !(die
->tag
== DW_TAG_inlined_subroutine
13477 && origin_die
->tag
== DW_TAG_subprogram
))
13478 complaint (&symfile_complaints
,
13479 _("DIE %s and its abstract origin %s have different tags"),
13480 sect_offset_str (die
->sect_off
),
13481 sect_offset_str (origin_die
->sect_off
));
13483 std::vector
<sect_offset
> offsets
;
13485 for (child_die
= die
->child
;
13486 child_die
&& child_die
->tag
;
13487 child_die
= sibling_die (child_die
))
13489 struct die_info
*child_origin_die
;
13490 struct dwarf2_cu
*child_origin_cu
;
13492 /* We are trying to process concrete instance entries:
13493 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
13494 it's not relevant to our analysis here. i.e. detecting DIEs that are
13495 present in the abstract instance but not referenced in the concrete
13497 if (child_die
->tag
== DW_TAG_call_site
13498 || child_die
->tag
== DW_TAG_GNU_call_site
)
13501 /* For each CHILD_DIE, find the corresponding child of
13502 ORIGIN_DIE. If there is more than one layer of
13503 DW_AT_abstract_origin, follow them all; there shouldn't be,
13504 but GCC versions at least through 4.4 generate this (GCC PR
13506 child_origin_die
= child_die
;
13507 child_origin_cu
= cu
;
13510 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
13514 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
13518 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
13519 counterpart may exist. */
13520 if (child_origin_die
!= child_die
)
13522 if (child_die
->tag
!= child_origin_die
->tag
13523 && !(child_die
->tag
== DW_TAG_inlined_subroutine
13524 && child_origin_die
->tag
== DW_TAG_subprogram
))
13525 complaint (&symfile_complaints
,
13526 _("Child DIE %s and its abstract origin %s have "
13528 sect_offset_str (child_die
->sect_off
),
13529 sect_offset_str (child_origin_die
->sect_off
));
13530 if (child_origin_die
->parent
!= origin_die
)
13531 complaint (&symfile_complaints
,
13532 _("Child DIE %s and its abstract origin %s have "
13533 "different parents"),
13534 sect_offset_str (child_die
->sect_off
),
13535 sect_offset_str (child_origin_die
->sect_off
));
13537 offsets
.push_back (child_origin_die
->sect_off
);
13540 std::sort (offsets
.begin (), offsets
.end ());
13541 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
13542 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
13543 if (offsetp
[-1] == *offsetp
)
13544 complaint (&symfile_complaints
,
13545 _("Multiple children of DIE %s refer "
13546 "to DIE %s as their abstract origin"),
13547 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
13549 offsetp
= offsets
.data ();
13550 origin_child_die
= origin_die
->child
;
13551 while (origin_child_die
&& origin_child_die
->tag
)
13553 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13554 while (offsetp
< offsets_end
13555 && *offsetp
< origin_child_die
->sect_off
)
13557 if (offsetp
>= offsets_end
13558 || *offsetp
> origin_child_die
->sect_off
)
13560 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13561 Check whether we're already processing ORIGIN_CHILD_DIE.
13562 This can happen with mutually referenced abstract_origins.
13564 if (!origin_child_die
->in_process
)
13565 process_die (origin_child_die
, origin_cu
);
13567 origin_child_die
= sibling_die (origin_child_die
);
13569 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13573 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13575 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13576 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13577 struct context_stack
*newobj
;
13580 struct die_info
*child_die
;
13581 struct attribute
*attr
, *call_line
, *call_file
;
13583 CORE_ADDR baseaddr
;
13584 struct block
*block
;
13585 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13586 std::vector
<struct symbol
*> template_args
;
13587 struct template_symbol
*templ_func
= NULL
;
13591 /* If we do not have call site information, we can't show the
13592 caller of this inlined function. That's too confusing, so
13593 only use the scope for local variables. */
13594 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13595 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13596 if (call_line
== NULL
|| call_file
== NULL
)
13598 read_lexical_block_scope (die
, cu
);
13603 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13605 name
= dwarf2_name (die
, cu
);
13607 /* Ignore functions with missing or empty names. These are actually
13608 illegal according to the DWARF standard. */
13611 complaint (&symfile_complaints
,
13612 _("missing name for subprogram DIE at %s"),
13613 sect_offset_str (die
->sect_off
));
13617 /* Ignore functions with missing or invalid low and high pc attributes. */
13618 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13619 <= PC_BOUNDS_INVALID
)
13621 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13622 if (!attr
|| !DW_UNSND (attr
))
13623 complaint (&symfile_complaints
,
13624 _("cannot get low and high bounds "
13625 "for subprogram DIE at %s"),
13626 sect_offset_str (die
->sect_off
));
13630 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13631 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13633 /* If we have any template arguments, then we must allocate a
13634 different sort of symbol. */
13635 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
13637 if (child_die
->tag
== DW_TAG_template_type_param
13638 || child_die
->tag
== DW_TAG_template_value_param
)
13640 templ_func
= allocate_template_symbol (objfile
);
13641 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13646 newobj
= push_context (0, lowpc
);
13647 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13648 (struct symbol
*) templ_func
);
13650 /* If there is a location expression for DW_AT_frame_base, record
13652 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13654 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13656 /* If there is a location for the static link, record it. */
13657 newobj
->static_link
= NULL
;
13658 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13661 newobj
->static_link
13662 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13663 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
13666 cu
->list_in_scope
= &local_symbols
;
13668 if (die
->child
!= NULL
)
13670 child_die
= die
->child
;
13671 while (child_die
&& child_die
->tag
)
13673 if (child_die
->tag
== DW_TAG_template_type_param
13674 || child_die
->tag
== DW_TAG_template_value_param
)
13676 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13679 template_args
.push_back (arg
);
13682 process_die (child_die
, cu
);
13683 child_die
= sibling_die (child_die
);
13687 inherit_abstract_dies (die
, cu
);
13689 /* If we have a DW_AT_specification, we might need to import using
13690 directives from the context of the specification DIE. See the
13691 comment in determine_prefix. */
13692 if (cu
->language
== language_cplus
13693 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13695 struct dwarf2_cu
*spec_cu
= cu
;
13696 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13700 child_die
= spec_die
->child
;
13701 while (child_die
&& child_die
->tag
)
13703 if (child_die
->tag
== DW_TAG_imported_module
)
13704 process_die (child_die
, spec_cu
);
13705 child_die
= sibling_die (child_die
);
13708 /* In some cases, GCC generates specification DIEs that
13709 themselves contain DW_AT_specification attributes. */
13710 spec_die
= die_specification (spec_die
, &spec_cu
);
13714 newobj
= pop_context ();
13715 /* Make a block for the local symbols within. */
13716 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
13717 newobj
->static_link
, lowpc
, highpc
);
13719 /* For C++, set the block's scope. */
13720 if ((cu
->language
== language_cplus
13721 || cu
->language
== language_fortran
13722 || cu
->language
== language_d
13723 || cu
->language
== language_rust
)
13724 && cu
->processing_has_namespace_info
)
13725 block_set_scope (block
, determine_prefix (die
, cu
),
13726 &objfile
->objfile_obstack
);
13728 /* If we have address ranges, record them. */
13729 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13731 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
13733 /* Attach template arguments to function. */
13734 if (!template_args
.empty ())
13736 gdb_assert (templ_func
!= NULL
);
13738 templ_func
->n_template_arguments
= template_args
.size ();
13739 templ_func
->template_arguments
13740 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13741 templ_func
->n_template_arguments
);
13742 memcpy (templ_func
->template_arguments
,
13743 template_args
.data (),
13744 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13747 /* In C++, we can have functions nested inside functions (e.g., when
13748 a function declares a class that has methods). This means that
13749 when we finish processing a function scope, we may need to go
13750 back to building a containing block's symbol lists. */
13751 local_symbols
= newobj
->locals
;
13752 local_using_directives
= newobj
->local_using_directives
;
13754 /* If we've finished processing a top-level function, subsequent
13755 symbols go in the file symbol list. */
13756 if (outermost_context_p ())
13757 cu
->list_in_scope
= &file_symbols
;
13760 /* Process all the DIES contained within a lexical block scope. Start
13761 a new scope, process the dies, and then close the scope. */
13764 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13766 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13767 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13768 struct context_stack
*newobj
;
13769 CORE_ADDR lowpc
, highpc
;
13770 struct die_info
*child_die
;
13771 CORE_ADDR baseaddr
;
13773 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13775 /* Ignore blocks with missing or invalid low and high pc attributes. */
13776 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13777 as multiple lexical blocks? Handling children in a sane way would
13778 be nasty. Might be easier to properly extend generic blocks to
13779 describe ranges. */
13780 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13782 case PC_BOUNDS_NOT_PRESENT
:
13783 /* DW_TAG_lexical_block has no attributes, process its children as if
13784 there was no wrapping by that DW_TAG_lexical_block.
13785 GCC does no longer produces such DWARF since GCC r224161. */
13786 for (child_die
= die
->child
;
13787 child_die
!= NULL
&& child_die
->tag
;
13788 child_die
= sibling_die (child_die
))
13789 process_die (child_die
, cu
);
13791 case PC_BOUNDS_INVALID
:
13794 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13795 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13797 push_context (0, lowpc
);
13798 if (die
->child
!= NULL
)
13800 child_die
= die
->child
;
13801 while (child_die
&& child_die
->tag
)
13803 process_die (child_die
, cu
);
13804 child_die
= sibling_die (child_die
);
13807 inherit_abstract_dies (die
, cu
);
13808 newobj
= pop_context ();
13810 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
13812 struct block
*block
13813 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
13814 newobj
->start_addr
, highpc
);
13816 /* Note that recording ranges after traversing children, as we
13817 do here, means that recording a parent's ranges entails
13818 walking across all its children's ranges as they appear in
13819 the address map, which is quadratic behavior.
13821 It would be nicer to record the parent's ranges before
13822 traversing its children, simply overriding whatever you find
13823 there. But since we don't even decide whether to create a
13824 block until after we've traversed its children, that's hard
13826 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13828 local_symbols
= newobj
->locals
;
13829 local_using_directives
= newobj
->local_using_directives
;
13832 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13835 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13837 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13838 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13839 CORE_ADDR pc
, baseaddr
;
13840 struct attribute
*attr
;
13841 struct call_site
*call_site
, call_site_local
;
13844 struct die_info
*child_die
;
13846 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13848 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13851 /* This was a pre-DWARF-5 GNU extension alias
13852 for DW_AT_call_return_pc. */
13853 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13857 complaint (&symfile_complaints
,
13858 _("missing DW_AT_call_return_pc for DW_TAG_call_site "
13859 "DIE %s [in module %s]"),
13860 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13863 pc
= attr_value_as_address (attr
) + baseaddr
;
13864 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13866 if (cu
->call_site_htab
== NULL
)
13867 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13868 NULL
, &objfile
->objfile_obstack
,
13869 hashtab_obstack_allocate
, NULL
);
13870 call_site_local
.pc
= pc
;
13871 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13874 complaint (&symfile_complaints
,
13875 _("Duplicate PC %s for DW_TAG_call_site "
13876 "DIE %s [in module %s]"),
13877 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13878 objfile_name (objfile
));
13882 /* Count parameters at the caller. */
13885 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13886 child_die
= sibling_die (child_die
))
13888 if (child_die
->tag
!= DW_TAG_call_site_parameter
13889 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13891 complaint (&symfile_complaints
,
13892 _("Tag %d is not DW_TAG_call_site_parameter in "
13893 "DW_TAG_call_site child DIE %s [in module %s]"),
13894 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13895 objfile_name (objfile
));
13903 = ((struct call_site
*)
13904 obstack_alloc (&objfile
->objfile_obstack
,
13905 sizeof (*call_site
)
13906 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13908 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13909 call_site
->pc
= pc
;
13911 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13912 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13914 struct die_info
*func_die
;
13916 /* Skip also over DW_TAG_inlined_subroutine. */
13917 for (func_die
= die
->parent
;
13918 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13919 && func_die
->tag
!= DW_TAG_subroutine_type
;
13920 func_die
= func_die
->parent
);
13922 /* DW_AT_call_all_calls is a superset
13923 of DW_AT_call_all_tail_calls. */
13925 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13926 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13927 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13928 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13930 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13931 not complete. But keep CALL_SITE for look ups via call_site_htab,
13932 both the initial caller containing the real return address PC and
13933 the final callee containing the current PC of a chain of tail
13934 calls do not need to have the tail call list complete. But any
13935 function candidate for a virtual tail call frame searched via
13936 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13937 determined unambiguously. */
13941 struct type
*func_type
= NULL
;
13944 func_type
= get_die_type (func_die
, cu
);
13945 if (func_type
!= NULL
)
13947 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
13949 /* Enlist this call site to the function. */
13950 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13951 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13954 complaint (&symfile_complaints
,
13955 _("Cannot find function owning DW_TAG_call_site "
13956 "DIE %s [in module %s]"),
13957 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13961 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13963 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13965 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13968 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13969 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13971 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
13972 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
13973 /* Keep NULL DWARF_BLOCK. */;
13974 else if (attr_form_is_block (attr
))
13976 struct dwarf2_locexpr_baton
*dlbaton
;
13978 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13979 dlbaton
->data
= DW_BLOCK (attr
)->data
;
13980 dlbaton
->size
= DW_BLOCK (attr
)->size
;
13981 dlbaton
->per_cu
= cu
->per_cu
;
13983 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
13985 else if (attr_form_is_ref (attr
))
13987 struct dwarf2_cu
*target_cu
= cu
;
13988 struct die_info
*target_die
;
13990 target_die
= follow_die_ref (die
, attr
, &target_cu
);
13991 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
13992 if (die_is_declaration (target_die
, target_cu
))
13994 const char *target_physname
;
13996 /* Prefer the mangled name; otherwise compute the demangled one. */
13997 target_physname
= dw2_linkage_name (target_die
, target_cu
);
13998 if (target_physname
== NULL
)
13999 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
14000 if (target_physname
== NULL
)
14001 complaint (&symfile_complaints
,
14002 _("DW_AT_call_target target DIE has invalid "
14003 "physname, for referencing DIE %s [in module %s]"),
14004 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14006 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
14012 /* DW_AT_entry_pc should be preferred. */
14013 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
14014 <= PC_BOUNDS_INVALID
)
14015 complaint (&symfile_complaints
,
14016 _("DW_AT_call_target target DIE has invalid "
14017 "low pc, for referencing DIE %s [in module %s]"),
14018 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14021 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
14022 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
14027 complaint (&symfile_complaints
,
14028 _("DW_TAG_call_site DW_AT_call_target is neither "
14029 "block nor reference, for DIE %s [in module %s]"),
14030 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14032 call_site
->per_cu
= cu
->per_cu
;
14034 for (child_die
= die
->child
;
14035 child_die
&& child_die
->tag
;
14036 child_die
= sibling_die (child_die
))
14038 struct call_site_parameter
*parameter
;
14039 struct attribute
*loc
, *origin
;
14041 if (child_die
->tag
!= DW_TAG_call_site_parameter
14042 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14044 /* Already printed the complaint above. */
14048 gdb_assert (call_site
->parameter_count
< nparams
);
14049 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
14051 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
14052 specifies DW_TAG_formal_parameter. Value of the data assumed for the
14053 register is contained in DW_AT_call_value. */
14055 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
14056 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
14057 if (origin
== NULL
)
14059 /* This was a pre-DWARF-5 GNU extension alias
14060 for DW_AT_call_parameter. */
14061 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
14063 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
14065 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
14067 sect_offset sect_off
14068 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
14069 if (!offset_in_cu_p (&cu
->header
, sect_off
))
14071 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
14072 binding can be done only inside one CU. Such referenced DIE
14073 therefore cannot be even moved to DW_TAG_partial_unit. */
14074 complaint (&symfile_complaints
,
14075 _("DW_AT_call_parameter offset is not in CU for "
14076 "DW_TAG_call_site child DIE %s [in module %s]"),
14077 sect_offset_str (child_die
->sect_off
),
14078 objfile_name (objfile
));
14081 parameter
->u
.param_cu_off
14082 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
14084 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
14086 complaint (&symfile_complaints
,
14087 _("No DW_FORM_block* DW_AT_location for "
14088 "DW_TAG_call_site child DIE %s [in module %s]"),
14089 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
14094 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
14095 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
14096 if (parameter
->u
.dwarf_reg
!= -1)
14097 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
14098 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
14099 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
14100 ¶meter
->u
.fb_offset
))
14101 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
14104 complaint (&symfile_complaints
,
14105 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
14106 "for DW_FORM_block* DW_AT_location is supported for "
14107 "DW_TAG_call_site child DIE %s "
14109 sect_offset_str (child_die
->sect_off
),
14110 objfile_name (objfile
));
14115 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
14117 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
14118 if (!attr_form_is_block (attr
))
14120 complaint (&symfile_complaints
,
14121 _("No DW_FORM_block* DW_AT_call_value for "
14122 "DW_TAG_call_site child DIE %s [in module %s]"),
14123 sect_offset_str (child_die
->sect_off
),
14124 objfile_name (objfile
));
14127 parameter
->value
= DW_BLOCK (attr
)->data
;
14128 parameter
->value_size
= DW_BLOCK (attr
)->size
;
14130 /* Parameters are not pre-cleared by memset above. */
14131 parameter
->data_value
= NULL
;
14132 parameter
->data_value_size
= 0;
14133 call_site
->parameter_count
++;
14135 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
14137 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
14140 if (!attr_form_is_block (attr
))
14141 complaint (&symfile_complaints
,
14142 _("No DW_FORM_block* DW_AT_call_data_value for "
14143 "DW_TAG_call_site child DIE %s [in module %s]"),
14144 sect_offset_str (child_die
->sect_off
),
14145 objfile_name (objfile
));
14148 parameter
->data_value
= DW_BLOCK (attr
)->data
;
14149 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
14155 /* Helper function for read_variable. If DIE represents a virtual
14156 table, then return the type of the concrete object that is
14157 associated with the virtual table. Otherwise, return NULL. */
14159 static struct type
*
14160 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14162 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14166 /* Find the type DIE. */
14167 struct die_info
*type_die
= NULL
;
14168 struct dwarf2_cu
*type_cu
= cu
;
14170 if (attr_form_is_ref (attr
))
14171 type_die
= follow_die_ref (die
, attr
, &type_cu
);
14172 if (type_die
== NULL
)
14175 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
14177 return die_containing_type (type_die
, type_cu
);
14180 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
14183 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
14185 struct rust_vtable_symbol
*storage
= NULL
;
14187 if (cu
->language
== language_rust
)
14189 struct type
*containing_type
= rust_containing_type (die
, cu
);
14191 if (containing_type
!= NULL
)
14193 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14195 storage
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
14196 struct rust_vtable_symbol
);
14197 initialize_objfile_symbol (storage
);
14198 storage
->concrete_type
= containing_type
;
14199 storage
->subclass
= SYMBOL_RUST_VTABLE
;
14203 new_symbol (die
, NULL
, cu
, storage
);
14206 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
14207 reading .debug_rnglists.
14208 Callback's type should be:
14209 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14210 Return true if the attributes are present and valid, otherwise,
14213 template <typename Callback
>
14215 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
14216 Callback
&&callback
)
14218 struct dwarf2_per_objfile
*dwarf2_per_objfile
14219 = cu
->per_cu
->dwarf2_per_objfile
;
14220 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14221 bfd
*obfd
= objfile
->obfd
;
14222 /* Base address selection entry. */
14225 const gdb_byte
*buffer
;
14226 CORE_ADDR baseaddr
;
14227 bool overflow
= false;
14229 found_base
= cu
->base_known
;
14230 base
= cu
->base_address
;
14232 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
14233 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
14235 complaint (&symfile_complaints
,
14236 _("Offset %d out of bounds for DW_AT_ranges attribute"),
14240 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
14242 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14246 /* Initialize it due to a false compiler warning. */
14247 CORE_ADDR range_beginning
= 0, range_end
= 0;
14248 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
14249 + dwarf2_per_objfile
->rnglists
.size
);
14250 unsigned int bytes_read
;
14252 if (buffer
== buf_end
)
14257 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
14260 case DW_RLE_end_of_list
:
14262 case DW_RLE_base_address
:
14263 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14268 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14270 buffer
+= bytes_read
;
14272 case DW_RLE_start_length
:
14273 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14278 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14279 buffer
+= bytes_read
;
14280 range_end
= (range_beginning
14281 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
14282 buffer
+= bytes_read
;
14283 if (buffer
> buf_end
)
14289 case DW_RLE_offset_pair
:
14290 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14291 buffer
+= bytes_read
;
14292 if (buffer
> buf_end
)
14297 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14298 buffer
+= bytes_read
;
14299 if (buffer
> buf_end
)
14305 case DW_RLE_start_end
:
14306 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
14311 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14312 buffer
+= bytes_read
;
14313 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14314 buffer
+= bytes_read
;
14317 complaint (&symfile_complaints
,
14318 _("Invalid .debug_rnglists data (no base address)"));
14321 if (rlet
== DW_RLE_end_of_list
|| overflow
)
14323 if (rlet
== DW_RLE_base_address
)
14328 /* We have no valid base address for the ranges
14330 complaint (&symfile_complaints
,
14331 _("Invalid .debug_rnglists data (no base address)"));
14335 if (range_beginning
> range_end
)
14337 /* Inverted range entries are invalid. */
14338 complaint (&symfile_complaints
,
14339 _("Invalid .debug_rnglists data (inverted range)"));
14343 /* Empty range entries have no effect. */
14344 if (range_beginning
== range_end
)
14347 range_beginning
+= base
;
14350 /* A not-uncommon case of bad debug info.
14351 Don't pollute the addrmap with bad data. */
14352 if (range_beginning
+ baseaddr
== 0
14353 && !dwarf2_per_objfile
->has_section_at_zero
)
14355 complaint (&symfile_complaints
,
14356 _(".debug_rnglists entry has start address of zero"
14357 " [in module %s]"), objfile_name (objfile
));
14361 callback (range_beginning
, range_end
);
14366 complaint (&symfile_complaints
,
14367 _("Offset %d is not terminated "
14368 "for DW_AT_ranges attribute"),
14376 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
14377 Callback's type should be:
14378 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14379 Return 1 if the attributes are present and valid, otherwise, return 0. */
14381 template <typename Callback
>
14383 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
14384 Callback
&&callback
)
14386 struct dwarf2_per_objfile
*dwarf2_per_objfile
14387 = cu
->per_cu
->dwarf2_per_objfile
;
14388 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14389 struct comp_unit_head
*cu_header
= &cu
->header
;
14390 bfd
*obfd
= objfile
->obfd
;
14391 unsigned int addr_size
= cu_header
->addr_size
;
14392 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14393 /* Base address selection entry. */
14396 unsigned int dummy
;
14397 const gdb_byte
*buffer
;
14398 CORE_ADDR baseaddr
;
14400 if (cu_header
->version
>= 5)
14401 return dwarf2_rnglists_process (offset
, cu
, callback
);
14403 found_base
= cu
->base_known
;
14404 base
= cu
->base_address
;
14406 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
14407 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
14409 complaint (&symfile_complaints
,
14410 _("Offset %d out of bounds for DW_AT_ranges attribute"),
14414 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
14416 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14420 CORE_ADDR range_beginning
, range_end
;
14422 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
14423 buffer
+= addr_size
;
14424 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
14425 buffer
+= addr_size
;
14426 offset
+= 2 * addr_size
;
14428 /* An end of list marker is a pair of zero addresses. */
14429 if (range_beginning
== 0 && range_end
== 0)
14430 /* Found the end of list entry. */
14433 /* Each base address selection entry is a pair of 2 values.
14434 The first is the largest possible address, the second is
14435 the base address. Check for a base address here. */
14436 if ((range_beginning
& mask
) == mask
)
14438 /* If we found the largest possible address, then we already
14439 have the base address in range_end. */
14447 /* We have no valid base address for the ranges
14449 complaint (&symfile_complaints
,
14450 _("Invalid .debug_ranges data (no base address)"));
14454 if (range_beginning
> range_end
)
14456 /* Inverted range entries are invalid. */
14457 complaint (&symfile_complaints
,
14458 _("Invalid .debug_ranges data (inverted range)"));
14462 /* Empty range entries have no effect. */
14463 if (range_beginning
== range_end
)
14466 range_beginning
+= base
;
14469 /* A not-uncommon case of bad debug info.
14470 Don't pollute the addrmap with bad data. */
14471 if (range_beginning
+ baseaddr
== 0
14472 && !dwarf2_per_objfile
->has_section_at_zero
)
14474 complaint (&symfile_complaints
,
14475 _(".debug_ranges entry has start address of zero"
14476 " [in module %s]"), objfile_name (objfile
));
14480 callback (range_beginning
, range_end
);
14486 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
14487 Return 1 if the attributes are present and valid, otherwise, return 0.
14488 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
14491 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
14492 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
14493 struct partial_symtab
*ranges_pst
)
14495 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14496 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14497 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
14498 SECT_OFF_TEXT (objfile
));
14501 CORE_ADDR high
= 0;
14504 retval
= dwarf2_ranges_process (offset
, cu
,
14505 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
14507 if (ranges_pst
!= NULL
)
14512 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
14513 range_beginning
+ baseaddr
);
14514 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
14515 range_end
+ baseaddr
);
14516 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
14520 /* FIXME: This is recording everything as a low-high
14521 segment of consecutive addresses. We should have a
14522 data structure for discontiguous block ranges
14526 low
= range_beginning
;
14532 if (range_beginning
< low
)
14533 low
= range_beginning
;
14534 if (range_end
> high
)
14542 /* If the first entry is an end-of-list marker, the range
14543 describes an empty scope, i.e. no instructions. */
14549 *high_return
= high
;
14553 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14554 definition for the return value. *LOWPC and *HIGHPC are set iff
14555 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14557 static enum pc_bounds_kind
14558 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14559 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14560 struct partial_symtab
*pst
)
14562 struct dwarf2_per_objfile
*dwarf2_per_objfile
14563 = cu
->per_cu
->dwarf2_per_objfile
;
14564 struct attribute
*attr
;
14565 struct attribute
*attr_high
;
14567 CORE_ADDR high
= 0;
14568 enum pc_bounds_kind ret
;
14570 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14573 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14576 low
= attr_value_as_address (attr
);
14577 high
= attr_value_as_address (attr_high
);
14578 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14582 /* Found high w/o low attribute. */
14583 return PC_BOUNDS_INVALID
;
14585 /* Found consecutive range of addresses. */
14586 ret
= PC_BOUNDS_HIGH_LOW
;
14590 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14593 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14594 We take advantage of the fact that DW_AT_ranges does not appear
14595 in DW_TAG_compile_unit of DWO files. */
14596 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14597 unsigned int ranges_offset
= (DW_UNSND (attr
)
14598 + (need_ranges_base
14602 /* Value of the DW_AT_ranges attribute is the offset in the
14603 .debug_ranges section. */
14604 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
14605 return PC_BOUNDS_INVALID
;
14606 /* Found discontinuous range of addresses. */
14607 ret
= PC_BOUNDS_RANGES
;
14610 return PC_BOUNDS_NOT_PRESENT
;
14613 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14615 return PC_BOUNDS_INVALID
;
14617 /* When using the GNU linker, .gnu.linkonce. sections are used to
14618 eliminate duplicate copies of functions and vtables and such.
14619 The linker will arbitrarily choose one and discard the others.
14620 The AT_*_pc values for such functions refer to local labels in
14621 these sections. If the section from that file was discarded, the
14622 labels are not in the output, so the relocs get a value of 0.
14623 If this is a discarded function, mark the pc bounds as invalid,
14624 so that GDB will ignore it. */
14625 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14626 return PC_BOUNDS_INVALID
;
14634 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14635 its low and high PC addresses. Do nothing if these addresses could not
14636 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14637 and HIGHPC to the high address if greater than HIGHPC. */
14640 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14641 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14642 struct dwarf2_cu
*cu
)
14644 CORE_ADDR low
, high
;
14645 struct die_info
*child
= die
->child
;
14647 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14649 *lowpc
= std::min (*lowpc
, low
);
14650 *highpc
= std::max (*highpc
, high
);
14653 /* If the language does not allow nested subprograms (either inside
14654 subprograms or lexical blocks), we're done. */
14655 if (cu
->language
!= language_ada
)
14658 /* Check all the children of the given DIE. If it contains nested
14659 subprograms, then check their pc bounds. Likewise, we need to
14660 check lexical blocks as well, as they may also contain subprogram
14662 while (child
&& child
->tag
)
14664 if (child
->tag
== DW_TAG_subprogram
14665 || child
->tag
== DW_TAG_lexical_block
)
14666 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14667 child
= sibling_die (child
);
14671 /* Get the low and high pc's represented by the scope DIE, and store
14672 them in *LOWPC and *HIGHPC. If the correct values can't be
14673 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14676 get_scope_pc_bounds (struct die_info
*die
,
14677 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14678 struct dwarf2_cu
*cu
)
14680 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14681 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14682 CORE_ADDR current_low
, current_high
;
14684 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14685 >= PC_BOUNDS_RANGES
)
14687 best_low
= current_low
;
14688 best_high
= current_high
;
14692 struct die_info
*child
= die
->child
;
14694 while (child
&& child
->tag
)
14696 switch (child
->tag
) {
14697 case DW_TAG_subprogram
:
14698 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14700 case DW_TAG_namespace
:
14701 case DW_TAG_module
:
14702 /* FIXME: carlton/2004-01-16: Should we do this for
14703 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14704 that current GCC's always emit the DIEs corresponding
14705 to definitions of methods of classes as children of a
14706 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14707 the DIEs giving the declarations, which could be
14708 anywhere). But I don't see any reason why the
14709 standards says that they have to be there. */
14710 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14712 if (current_low
!= ((CORE_ADDR
) -1))
14714 best_low
= std::min (best_low
, current_low
);
14715 best_high
= std::max (best_high
, current_high
);
14723 child
= sibling_die (child
);
14728 *highpc
= best_high
;
14731 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14735 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14736 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14738 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14739 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14740 struct attribute
*attr
;
14741 struct attribute
*attr_high
;
14743 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14746 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14749 CORE_ADDR low
= attr_value_as_address (attr
);
14750 CORE_ADDR high
= attr_value_as_address (attr_high
);
14752 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14755 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14756 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14757 record_block_range (block
, low
, high
- 1);
14761 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14764 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14765 We take advantage of the fact that DW_AT_ranges does not appear
14766 in DW_TAG_compile_unit of DWO files. */
14767 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14769 /* The value of the DW_AT_ranges attribute is the offset of the
14770 address range list in the .debug_ranges section. */
14771 unsigned long offset
= (DW_UNSND (attr
)
14772 + (need_ranges_base
? cu
->ranges_base
: 0));
14774 dwarf2_ranges_process (offset
, cu
,
14775 [&] (CORE_ADDR start
, CORE_ADDR end
)
14779 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14780 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14781 record_block_range (block
, start
, end
- 1);
14786 /* Check whether the producer field indicates either of GCC < 4.6, or the
14787 Intel C/C++ compiler, and cache the result in CU. */
14790 check_producer (struct dwarf2_cu
*cu
)
14794 if (cu
->producer
== NULL
)
14796 /* For unknown compilers expect their behavior is DWARF version
14799 GCC started to support .debug_types sections by -gdwarf-4 since
14800 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14801 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14802 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14803 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14805 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14807 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14808 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14810 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14811 cu
->producer_is_icc_lt_14
= major
< 14;
14814 /* For other non-GCC compilers, expect their behavior is DWARF version
14818 cu
->checked_producer
= 1;
14821 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14822 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14823 during 4.6.0 experimental. */
14826 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14828 if (!cu
->checked_producer
)
14829 check_producer (cu
);
14831 return cu
->producer_is_gxx_lt_4_6
;
14834 /* Return the default accessibility type if it is not overriden by
14835 DW_AT_accessibility. */
14837 static enum dwarf_access_attribute
14838 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14840 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14842 /* The default DWARF 2 accessibility for members is public, the default
14843 accessibility for inheritance is private. */
14845 if (die
->tag
!= DW_TAG_inheritance
)
14846 return DW_ACCESS_public
;
14848 return DW_ACCESS_private
;
14852 /* DWARF 3+ defines the default accessibility a different way. The same
14853 rules apply now for DW_TAG_inheritance as for the members and it only
14854 depends on the container kind. */
14856 if (die
->parent
->tag
== DW_TAG_class_type
)
14857 return DW_ACCESS_private
;
14859 return DW_ACCESS_public
;
14863 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14864 offset. If the attribute was not found return 0, otherwise return
14865 1. If it was found but could not properly be handled, set *OFFSET
14869 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14872 struct attribute
*attr
;
14874 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14879 /* Note that we do not check for a section offset first here.
14880 This is because DW_AT_data_member_location is new in DWARF 4,
14881 so if we see it, we can assume that a constant form is really
14882 a constant and not a section offset. */
14883 if (attr_form_is_constant (attr
))
14884 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
14885 else if (attr_form_is_section_offset (attr
))
14886 dwarf2_complex_location_expr_complaint ();
14887 else if (attr_form_is_block (attr
))
14888 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14890 dwarf2_complex_location_expr_complaint ();
14898 /* Add an aggregate field to the field list. */
14901 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14902 struct dwarf2_cu
*cu
)
14904 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14905 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14906 struct nextfield
*new_field
;
14907 struct attribute
*attr
;
14909 const char *fieldname
= "";
14911 if (die
->tag
== DW_TAG_inheritance
)
14913 fip
->baseclasses
.emplace_back ();
14914 new_field
= &fip
->baseclasses
.back ();
14918 fip
->fields
.emplace_back ();
14919 new_field
= &fip
->fields
.back ();
14924 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14926 new_field
->accessibility
= DW_UNSND (attr
);
14928 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
14929 if (new_field
->accessibility
!= DW_ACCESS_public
)
14930 fip
->non_public_fields
= 1;
14932 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14934 new_field
->virtuality
= DW_UNSND (attr
);
14936 new_field
->virtuality
= DW_VIRTUALITY_none
;
14938 fp
= &new_field
->field
;
14940 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
14944 /* Data member other than a C++ static data member. */
14946 /* Get type of field. */
14947 fp
->type
= die_type (die
, cu
);
14949 SET_FIELD_BITPOS (*fp
, 0);
14951 /* Get bit size of field (zero if none). */
14952 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
14955 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
14959 FIELD_BITSIZE (*fp
) = 0;
14962 /* Get bit offset of field. */
14963 if (handle_data_member_location (die
, cu
, &offset
))
14964 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
14965 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
14968 if (gdbarch_bits_big_endian (gdbarch
))
14970 /* For big endian bits, the DW_AT_bit_offset gives the
14971 additional bit offset from the MSB of the containing
14972 anonymous object to the MSB of the field. We don't
14973 have to do anything special since we don't need to
14974 know the size of the anonymous object. */
14975 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
14979 /* For little endian bits, compute the bit offset to the
14980 MSB of the anonymous object, subtract off the number of
14981 bits from the MSB of the field to the MSB of the
14982 object, and then subtract off the number of bits of
14983 the field itself. The result is the bit offset of
14984 the LSB of the field. */
14985 int anonymous_size
;
14986 int bit_offset
= DW_UNSND (attr
);
14988 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14991 /* The size of the anonymous object containing
14992 the bit field is explicit, so use the
14993 indicated size (in bytes). */
14994 anonymous_size
= DW_UNSND (attr
);
14998 /* The size of the anonymous object containing
14999 the bit field must be inferred from the type
15000 attribute of the data member containing the
15002 anonymous_size
= TYPE_LENGTH (fp
->type
);
15004 SET_FIELD_BITPOS (*fp
,
15005 (FIELD_BITPOS (*fp
)
15006 + anonymous_size
* bits_per_byte
15007 - bit_offset
- FIELD_BITSIZE (*fp
)));
15010 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
15012 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
15013 + dwarf2_get_attr_constant_value (attr
, 0)));
15015 /* Get name of field. */
15016 fieldname
= dwarf2_name (die
, cu
);
15017 if (fieldname
== NULL
)
15020 /* The name is already allocated along with this objfile, so we don't
15021 need to duplicate it for the type. */
15022 fp
->name
= fieldname
;
15024 /* Change accessibility for artificial fields (e.g. virtual table
15025 pointer or virtual base class pointer) to private. */
15026 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
15028 FIELD_ARTIFICIAL (*fp
) = 1;
15029 new_field
->accessibility
= DW_ACCESS_private
;
15030 fip
->non_public_fields
= 1;
15033 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
15035 /* C++ static member. */
15037 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
15038 is a declaration, but all versions of G++ as of this writing
15039 (so through at least 3.2.1) incorrectly generate
15040 DW_TAG_variable tags. */
15042 const char *physname
;
15044 /* Get name of field. */
15045 fieldname
= dwarf2_name (die
, cu
);
15046 if (fieldname
== NULL
)
15049 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15051 /* Only create a symbol if this is an external value.
15052 new_symbol checks this and puts the value in the global symbol
15053 table, which we want. If it is not external, new_symbol
15054 will try to put the value in cu->list_in_scope which is wrong. */
15055 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
15057 /* A static const member, not much different than an enum as far as
15058 we're concerned, except that we can support more types. */
15059 new_symbol (die
, NULL
, cu
);
15062 /* Get physical name. */
15063 physname
= dwarf2_physname (fieldname
, die
, cu
);
15065 /* The name is already allocated along with this objfile, so we don't
15066 need to duplicate it for the type. */
15067 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
15068 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15069 FIELD_NAME (*fp
) = fieldname
;
15071 else if (die
->tag
== DW_TAG_inheritance
)
15075 /* C++ base class field. */
15076 if (handle_data_member_location (die
, cu
, &offset
))
15077 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15078 FIELD_BITSIZE (*fp
) = 0;
15079 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15080 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
15082 else if (die
->tag
== DW_TAG_variant_part
)
15084 /* process_structure_scope will treat this DIE as a union. */
15085 process_structure_scope (die
, cu
);
15087 /* The variant part is relative to the start of the enclosing
15089 SET_FIELD_BITPOS (*fp
, 0);
15090 fp
->type
= get_die_type (die
, cu
);
15091 fp
->artificial
= 1;
15092 fp
->name
= "<<variant>>";
15095 gdb_assert_not_reached ("missing case in dwarf2_add_field");
15098 /* Can the type given by DIE define another type? */
15101 type_can_define_types (const struct die_info
*die
)
15105 case DW_TAG_typedef
:
15106 case DW_TAG_class_type
:
15107 case DW_TAG_structure_type
:
15108 case DW_TAG_union_type
:
15109 case DW_TAG_enumeration_type
:
15117 /* Add a type definition defined in the scope of the FIP's class. */
15120 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
15121 struct dwarf2_cu
*cu
)
15123 struct decl_field fp
;
15124 memset (&fp
, 0, sizeof (fp
));
15126 gdb_assert (type_can_define_types (die
));
15128 /* Get name of field. NULL is okay here, meaning an anonymous type. */
15129 fp
.name
= dwarf2_name (die
, cu
);
15130 fp
.type
= read_type_die (die
, cu
);
15132 /* Save accessibility. */
15133 enum dwarf_access_attribute accessibility
;
15134 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15136 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15138 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15139 switch (accessibility
)
15141 case DW_ACCESS_public
:
15142 /* The assumed value if neither private nor protected. */
15144 case DW_ACCESS_private
:
15147 case DW_ACCESS_protected
:
15148 fp
.is_protected
= 1;
15151 complaint (&symfile_complaints
,
15152 _("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
15155 if (die
->tag
== DW_TAG_typedef
)
15156 fip
->typedef_field_list
.push_back (fp
);
15158 fip
->nested_types_list
.push_back (fp
);
15161 /* Create the vector of fields, and attach it to the type. */
15164 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
15165 struct dwarf2_cu
*cu
)
15167 int nfields
= fip
->nfields
;
15169 /* Record the field count, allocate space for the array of fields,
15170 and create blank accessibility bitfields if necessary. */
15171 TYPE_NFIELDS (type
) = nfields
;
15172 TYPE_FIELDS (type
) = (struct field
*)
15173 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
15175 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
15177 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15179 TYPE_FIELD_PRIVATE_BITS (type
) =
15180 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15181 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
15183 TYPE_FIELD_PROTECTED_BITS (type
) =
15184 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15185 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
15187 TYPE_FIELD_IGNORE_BITS (type
) =
15188 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15189 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
15192 /* If the type has baseclasses, allocate and clear a bit vector for
15193 TYPE_FIELD_VIRTUAL_BITS. */
15194 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
15196 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
15197 unsigned char *pointer
;
15199 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15200 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
15201 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
15202 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
15203 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
15206 if (TYPE_FLAG_DISCRIMINATED_UNION (type
))
15208 struct discriminant_info
*di
= alloc_discriminant_info (type
, -1, -1);
15210 for (int index
= 0; index
< nfields
; ++index
)
15212 struct nextfield
&field
= fip
->fields
[index
];
15214 if (field
.variant
.is_discriminant
)
15215 di
->discriminant_index
= index
;
15216 else if (field
.variant
.default_branch
)
15217 di
->default_index
= index
;
15219 di
->discriminants
[index
] = field
.variant
.discriminant_value
;
15223 /* Copy the saved-up fields into the field vector. */
15224 for (int i
= 0; i
< nfields
; ++i
)
15226 struct nextfield
&field
15227 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
15228 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
15230 TYPE_FIELD (type
, i
) = field
.field
;
15231 switch (field
.accessibility
)
15233 case DW_ACCESS_private
:
15234 if (cu
->language
!= language_ada
)
15235 SET_TYPE_FIELD_PRIVATE (type
, i
);
15238 case DW_ACCESS_protected
:
15239 if (cu
->language
!= language_ada
)
15240 SET_TYPE_FIELD_PROTECTED (type
, i
);
15243 case DW_ACCESS_public
:
15247 /* Unknown accessibility. Complain and treat it as public. */
15249 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
15250 field
.accessibility
);
15254 if (i
< fip
->baseclasses
.size ())
15256 switch (field
.virtuality
)
15258 case DW_VIRTUALITY_virtual
:
15259 case DW_VIRTUALITY_pure_virtual
:
15260 if (cu
->language
== language_ada
)
15261 error (_("unexpected virtuality in component of Ada type"));
15262 SET_TYPE_FIELD_VIRTUAL (type
, i
);
15269 /* Return true if this member function is a constructor, false
15273 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
15275 const char *fieldname
;
15276 const char *type_name
;
15279 if (die
->parent
== NULL
)
15282 if (die
->parent
->tag
!= DW_TAG_structure_type
15283 && die
->parent
->tag
!= DW_TAG_union_type
15284 && die
->parent
->tag
!= DW_TAG_class_type
)
15287 fieldname
= dwarf2_name (die
, cu
);
15288 type_name
= dwarf2_name (die
->parent
, cu
);
15289 if (fieldname
== NULL
|| type_name
== NULL
)
15292 len
= strlen (fieldname
);
15293 return (strncmp (fieldname
, type_name
, len
) == 0
15294 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
15297 /* Add a member function to the proper fieldlist. */
15300 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15301 struct type
*type
, struct dwarf2_cu
*cu
)
15303 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15304 struct attribute
*attr
;
15306 struct fnfieldlist
*flp
= nullptr;
15307 struct fn_field
*fnp
;
15308 const char *fieldname
;
15309 struct type
*this_type
;
15310 enum dwarf_access_attribute accessibility
;
15312 if (cu
->language
== language_ada
)
15313 error (_("unexpected member function in Ada type"));
15315 /* Get name of member function. */
15316 fieldname
= dwarf2_name (die
, cu
);
15317 if (fieldname
== NULL
)
15320 /* Look up member function name in fieldlist. */
15321 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15323 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15325 flp
= &fip
->fnfieldlists
[i
];
15330 /* Create a new fnfieldlist if necessary. */
15331 if (flp
== nullptr)
15333 fip
->fnfieldlists
.emplace_back ();
15334 flp
= &fip
->fnfieldlists
.back ();
15335 flp
->name
= fieldname
;
15336 i
= fip
->fnfieldlists
.size () - 1;
15339 /* Create a new member function field and add it to the vector of
15341 flp
->fnfields
.emplace_back ();
15342 fnp
= &flp
->fnfields
.back ();
15344 /* Delay processing of the physname until later. */
15345 if (cu
->language
== language_cplus
)
15346 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15350 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15351 fnp
->physname
= physname
? physname
: "";
15354 fnp
->type
= alloc_type (objfile
);
15355 this_type
= read_type_die (die
, cu
);
15356 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
15358 int nparams
= TYPE_NFIELDS (this_type
);
15360 /* TYPE is the domain of this method, and THIS_TYPE is the type
15361 of the method itself (TYPE_CODE_METHOD). */
15362 smash_to_method_type (fnp
->type
, type
,
15363 TYPE_TARGET_TYPE (this_type
),
15364 TYPE_FIELDS (this_type
),
15365 TYPE_NFIELDS (this_type
),
15366 TYPE_VARARGS (this_type
));
15368 /* Handle static member functions.
15369 Dwarf2 has no clean way to discern C++ static and non-static
15370 member functions. G++ helps GDB by marking the first
15371 parameter for non-static member functions (which is the this
15372 pointer) as artificial. We obtain this information from
15373 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15374 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15375 fnp
->voffset
= VOFFSET_STATIC
;
15378 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
15379 dwarf2_full_name (fieldname
, die
, cu
));
15381 /* Get fcontext from DW_AT_containing_type if present. */
15382 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15383 fnp
->fcontext
= die_containing_type (die
, cu
);
15385 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15386 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15388 /* Get accessibility. */
15389 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15391 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15393 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15394 switch (accessibility
)
15396 case DW_ACCESS_private
:
15397 fnp
->is_private
= 1;
15399 case DW_ACCESS_protected
:
15400 fnp
->is_protected
= 1;
15404 /* Check for artificial methods. */
15405 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15406 if (attr
&& DW_UNSND (attr
) != 0)
15407 fnp
->is_artificial
= 1;
15409 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15411 /* Get index in virtual function table if it is a virtual member
15412 function. For older versions of GCC, this is an offset in the
15413 appropriate virtual table, as specified by DW_AT_containing_type.
15414 For everyone else, it is an expression to be evaluated relative
15415 to the object address. */
15417 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15420 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
15422 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15424 /* Old-style GCC. */
15425 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15427 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15428 || (DW_BLOCK (attr
)->size
> 1
15429 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15430 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15432 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15433 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15434 dwarf2_complex_location_expr_complaint ();
15436 fnp
->voffset
/= cu
->header
.addr_size
;
15440 dwarf2_complex_location_expr_complaint ();
15442 if (!fnp
->fcontext
)
15444 /* If there is no `this' field and no DW_AT_containing_type,
15445 we cannot actually find a base class context for the
15447 if (TYPE_NFIELDS (this_type
) == 0
15448 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15450 complaint (&symfile_complaints
,
15451 _("cannot determine context for virtual member "
15452 "function \"%s\" (offset %s)"),
15453 fieldname
, sect_offset_str (die
->sect_off
));
15458 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15462 else if (attr_form_is_section_offset (attr
))
15464 dwarf2_complex_location_expr_complaint ();
15468 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15474 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15475 if (attr
&& DW_UNSND (attr
))
15477 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15478 complaint (&symfile_complaints
,
15479 _("Member function \"%s\" (offset %s) is virtual "
15480 "but the vtable offset is not specified"),
15481 fieldname
, sect_offset_str (die
->sect_off
));
15482 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15483 TYPE_CPLUS_DYNAMIC (type
) = 1;
15488 /* Create the vector of member function fields, and attach it to the type. */
15491 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15492 struct dwarf2_cu
*cu
)
15494 if (cu
->language
== language_ada
)
15495 error (_("unexpected member functions in Ada type"));
15497 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15498 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15500 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15502 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15504 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15505 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15507 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15508 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15509 fn_flp
->fn_fields
= (struct fn_field
*)
15510 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15512 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15513 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15516 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15519 /* Returns non-zero if NAME is the name of a vtable member in CU's
15520 language, zero otherwise. */
15522 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15524 static const char vptr
[] = "_vptr";
15526 /* Look for the C++ form of the vtable. */
15527 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15533 /* GCC outputs unnamed structures that are really pointers to member
15534 functions, with the ABI-specified layout. If TYPE describes
15535 such a structure, smash it into a member function type.
15537 GCC shouldn't do this; it should just output pointer to member DIEs.
15538 This is GCC PR debug/28767. */
15541 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15543 struct type
*pfn_type
, *self_type
, *new_type
;
15545 /* Check for a structure with no name and two children. */
15546 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15549 /* Check for __pfn and __delta members. */
15550 if (TYPE_FIELD_NAME (type
, 0) == NULL
15551 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15552 || TYPE_FIELD_NAME (type
, 1) == NULL
15553 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15556 /* Find the type of the method. */
15557 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15558 if (pfn_type
== NULL
15559 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15560 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15563 /* Look for the "this" argument. */
15564 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15565 if (TYPE_NFIELDS (pfn_type
) == 0
15566 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15567 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15570 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15571 new_type
= alloc_type (objfile
);
15572 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15573 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15574 TYPE_VARARGS (pfn_type
));
15575 smash_to_methodptr_type (type
, new_type
);
15579 /* Called when we find the DIE that starts a structure or union scope
15580 (definition) to create a type for the structure or union. Fill in
15581 the type's name and general properties; the members will not be
15582 processed until process_structure_scope. A symbol table entry for
15583 the type will also not be done until process_structure_scope (assuming
15584 the type has a name).
15586 NOTE: we need to call these functions regardless of whether or not the
15587 DIE has a DW_AT_name attribute, since it might be an anonymous
15588 structure or union. This gets the type entered into our set of
15589 user defined types. */
15591 static struct type
*
15592 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15594 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15596 struct attribute
*attr
;
15599 /* If the definition of this type lives in .debug_types, read that type.
15600 Don't follow DW_AT_specification though, that will take us back up
15601 the chain and we want to go down. */
15602 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
15605 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15607 /* The type's CU may not be the same as CU.
15608 Ensure TYPE is recorded with CU in die_type_hash. */
15609 return set_die_type (die
, type
, cu
);
15612 type
= alloc_type (objfile
);
15613 INIT_CPLUS_SPECIFIC (type
);
15615 name
= dwarf2_name (die
, cu
);
15618 if (cu
->language
== language_cplus
15619 || cu
->language
== language_d
15620 || cu
->language
== language_rust
)
15622 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15624 /* dwarf2_full_name might have already finished building the DIE's
15625 type. If so, there is no need to continue. */
15626 if (get_die_type (die
, cu
) != NULL
)
15627 return get_die_type (die
, cu
);
15629 TYPE_TAG_NAME (type
) = full_name
;
15630 if (die
->tag
== DW_TAG_structure_type
15631 || die
->tag
== DW_TAG_class_type
)
15632 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
15636 /* The name is already allocated along with this objfile, so
15637 we don't need to duplicate it for the type. */
15638 TYPE_TAG_NAME (type
) = name
;
15639 if (die
->tag
== DW_TAG_class_type
)
15640 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
15644 if (die
->tag
== DW_TAG_structure_type
)
15646 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15648 else if (die
->tag
== DW_TAG_union_type
)
15650 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15652 else if (die
->tag
== DW_TAG_variant_part
)
15654 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15655 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
15659 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15662 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15663 TYPE_DECLARED_CLASS (type
) = 1;
15665 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15668 if (attr_form_is_constant (attr
))
15669 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15672 /* For the moment, dynamic type sizes are not supported
15673 by GDB's struct type. The actual size is determined
15674 on-demand when resolving the type of a given object,
15675 so set the type's length to zero for now. Otherwise,
15676 we record an expression as the length, and that expression
15677 could lead to a very large value, which could eventually
15678 lead to us trying to allocate that much memory when creating
15679 a value of that type. */
15680 TYPE_LENGTH (type
) = 0;
15685 TYPE_LENGTH (type
) = 0;
15688 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15690 /* ICC<14 does not output the required DW_AT_declaration on
15691 incomplete types, but gives them a size of zero. */
15692 TYPE_STUB (type
) = 1;
15695 TYPE_STUB_SUPPORTED (type
) = 1;
15697 if (die_is_declaration (die
, cu
))
15698 TYPE_STUB (type
) = 1;
15699 else if (attr
== NULL
&& die
->child
== NULL
15700 && producer_is_realview (cu
->producer
))
15701 /* RealView does not output the required DW_AT_declaration
15702 on incomplete types. */
15703 TYPE_STUB (type
) = 1;
15705 /* We need to add the type field to the die immediately so we don't
15706 infinitely recurse when dealing with pointers to the structure
15707 type within the structure itself. */
15708 set_die_type (die
, type
, cu
);
15710 /* set_die_type should be already done. */
15711 set_descriptive_type (type
, die
, cu
);
15716 /* A helper for process_structure_scope that handles a single member
15720 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15721 struct field_info
*fi
,
15722 std::vector
<struct symbol
*> *template_args
,
15723 struct dwarf2_cu
*cu
)
15725 if (child_die
->tag
== DW_TAG_member
15726 || child_die
->tag
== DW_TAG_variable
15727 || child_die
->tag
== DW_TAG_variant_part
)
15729 /* NOTE: carlton/2002-11-05: A C++ static data member
15730 should be a DW_TAG_member that is a declaration, but
15731 all versions of G++ as of this writing (so through at
15732 least 3.2.1) incorrectly generate DW_TAG_variable
15733 tags for them instead. */
15734 dwarf2_add_field (fi
, child_die
, cu
);
15736 else if (child_die
->tag
== DW_TAG_subprogram
)
15738 /* Rust doesn't have member functions in the C++ sense.
15739 However, it does emit ordinary functions as children
15740 of a struct DIE. */
15741 if (cu
->language
== language_rust
)
15742 read_func_scope (child_die
, cu
);
15745 /* C++ member function. */
15746 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15749 else if (child_die
->tag
== DW_TAG_inheritance
)
15751 /* C++ base class field. */
15752 dwarf2_add_field (fi
, child_die
, cu
);
15754 else if (type_can_define_types (child_die
))
15755 dwarf2_add_type_defn (fi
, child_die
, cu
);
15756 else if (child_die
->tag
== DW_TAG_template_type_param
15757 || child_die
->tag
== DW_TAG_template_value_param
)
15759 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15762 template_args
->push_back (arg
);
15764 else if (child_die
->tag
== DW_TAG_variant
)
15766 /* In a variant we want to get the discriminant and also add a
15767 field for our sole member child. */
15768 struct attribute
*discr
= dwarf2_attr (child_die
, DW_AT_discr_value
, cu
);
15770 for (struct die_info
*variant_child
= child_die
->child
;
15771 variant_child
!= NULL
;
15772 variant_child
= sibling_die (variant_child
))
15774 if (variant_child
->tag
== DW_TAG_member
)
15776 handle_struct_member_die (variant_child
, type
, fi
,
15777 template_args
, cu
);
15778 /* Only handle the one. */
15783 /* We don't handle this but we might as well report it if we see
15785 if (dwarf2_attr (child_die
, DW_AT_discr_list
, cu
) != nullptr)
15786 complaint (&symfile_complaints
,
15787 _("DW_AT_discr_list is not supported yet"
15788 " - DIE at %s [in module %s]"),
15789 sect_offset_str (child_die
->sect_off
),
15790 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15792 /* The first field was just added, so we can stash the
15793 discriminant there. */
15794 gdb_assert (!fi
->fields
.empty ());
15796 fi
->fields
.back ().variant
.default_branch
= true;
15798 fi
->fields
.back ().variant
.discriminant_value
= DW_UNSND (discr
);
15802 /* Finish creating a structure or union type, including filling in
15803 its members and creating a symbol for it. */
15806 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15808 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15809 struct die_info
*child_die
;
15812 type
= get_die_type (die
, cu
);
15814 type
= read_structure_type (die
, cu
);
15816 /* When reading a DW_TAG_variant_part, we need to notice when we
15817 read the discriminant member, so we can record it later in the
15818 discriminant_info. */
15819 bool is_variant_part
= TYPE_FLAG_DISCRIMINATED_UNION (type
);
15820 sect_offset discr_offset
;
15822 if (is_variant_part
)
15824 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15827 /* Maybe it's a univariant form, an extension we support.
15828 In this case arrange not to check the offset. */
15829 is_variant_part
= false;
15831 else if (attr_form_is_ref (discr
))
15833 struct dwarf2_cu
*target_cu
= cu
;
15834 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15836 discr_offset
= target_die
->sect_off
;
15840 complaint (&symfile_complaints
,
15841 _("DW_AT_discr does not have DIE reference form"
15842 " - DIE at %s [in module %s]"),
15843 sect_offset_str (die
->sect_off
),
15844 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15845 is_variant_part
= false;
15849 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15851 struct field_info fi
;
15852 std::vector
<struct symbol
*> template_args
;
15854 child_die
= die
->child
;
15856 while (child_die
&& child_die
->tag
)
15858 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15860 if (is_variant_part
&& discr_offset
== child_die
->sect_off
)
15861 fi
.fields
.back ().variant
.is_discriminant
= true;
15863 child_die
= sibling_die (child_die
);
15866 /* Attach template arguments to type. */
15867 if (!template_args
.empty ())
15869 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15870 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15871 TYPE_TEMPLATE_ARGUMENTS (type
)
15872 = XOBNEWVEC (&objfile
->objfile_obstack
,
15874 TYPE_N_TEMPLATE_ARGUMENTS (type
));
15875 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
15876 template_args
.data (),
15877 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
15878 * sizeof (struct symbol
*)));
15881 /* Attach fields and member functions to the type. */
15883 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
15884 if (!fi
.fnfieldlists
.empty ())
15886 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
15888 /* Get the type which refers to the base class (possibly this
15889 class itself) which contains the vtable pointer for the current
15890 class from the DW_AT_containing_type attribute. This use of
15891 DW_AT_containing_type is a GNU extension. */
15893 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15895 struct type
*t
= die_containing_type (die
, cu
);
15897 set_type_vptr_basetype (type
, t
);
15902 /* Our own class provides vtbl ptr. */
15903 for (i
= TYPE_NFIELDS (t
) - 1;
15904 i
>= TYPE_N_BASECLASSES (t
);
15907 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
15909 if (is_vtable_name (fieldname
, cu
))
15911 set_type_vptr_fieldno (type
, i
);
15916 /* Complain if virtual function table field not found. */
15917 if (i
< TYPE_N_BASECLASSES (t
))
15918 complaint (&symfile_complaints
,
15919 _("virtual function table pointer "
15920 "not found when defining class '%s'"),
15921 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
15926 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
15929 else if (cu
->producer
15930 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
15932 /* The IBM XLC compiler does not provide direct indication
15933 of the containing type, but the vtable pointer is
15934 always named __vfp. */
15938 for (i
= TYPE_NFIELDS (type
) - 1;
15939 i
>= TYPE_N_BASECLASSES (type
);
15942 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
15944 set_type_vptr_fieldno (type
, i
);
15945 set_type_vptr_basetype (type
, type
);
15952 /* Copy fi.typedef_field_list linked list elements content into the
15953 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
15954 if (!fi
.typedef_field_list
.empty ())
15956 int count
= fi
.typedef_field_list
.size ();
15958 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15959 TYPE_TYPEDEF_FIELD_ARRAY (type
)
15960 = ((struct decl_field
*)
15962 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
15963 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
15965 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
15966 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
15969 /* Copy fi.nested_types_list linked list elements content into the
15970 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
15971 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
15973 int count
= fi
.nested_types_list
.size ();
15975 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15976 TYPE_NESTED_TYPES_ARRAY (type
)
15977 = ((struct decl_field
*)
15978 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
15979 TYPE_NESTED_TYPES_COUNT (type
) = count
;
15981 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
15982 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
15986 quirk_gcc_member_function_pointer (type
, objfile
);
15987 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
15988 cu
->rust_unions
.push_back (type
);
15990 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
15991 snapshots) has been known to create a die giving a declaration
15992 for a class that has, as a child, a die giving a definition for a
15993 nested class. So we have to process our children even if the
15994 current die is a declaration. Normally, of course, a declaration
15995 won't have any children at all. */
15997 child_die
= die
->child
;
15999 while (child_die
!= NULL
&& child_die
->tag
)
16001 if (child_die
->tag
== DW_TAG_member
16002 || child_die
->tag
== DW_TAG_variable
16003 || child_die
->tag
== DW_TAG_inheritance
16004 || child_die
->tag
== DW_TAG_template_value_param
16005 || child_die
->tag
== DW_TAG_template_type_param
)
16010 process_die (child_die
, cu
);
16012 child_die
= sibling_die (child_die
);
16015 /* Do not consider external references. According to the DWARF standard,
16016 these DIEs are identified by the fact that they have no byte_size
16017 attribute, and a declaration attribute. */
16018 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
16019 || !die_is_declaration (die
, cu
))
16020 new_symbol (die
, type
, cu
);
16023 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
16024 update TYPE using some information only available in DIE's children. */
16027 update_enumeration_type_from_children (struct die_info
*die
,
16029 struct dwarf2_cu
*cu
)
16031 struct die_info
*child_die
;
16032 int unsigned_enum
= 1;
16036 auto_obstack obstack
;
16038 for (child_die
= die
->child
;
16039 child_die
!= NULL
&& child_die
->tag
;
16040 child_die
= sibling_die (child_die
))
16042 struct attribute
*attr
;
16044 const gdb_byte
*bytes
;
16045 struct dwarf2_locexpr_baton
*baton
;
16048 if (child_die
->tag
!= DW_TAG_enumerator
)
16051 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
16055 name
= dwarf2_name (child_die
, cu
);
16057 name
= "<anonymous enumerator>";
16059 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
16060 &value
, &bytes
, &baton
);
16066 else if ((mask
& value
) != 0)
16071 /* If we already know that the enum type is neither unsigned, nor
16072 a flag type, no need to look at the rest of the enumerates. */
16073 if (!unsigned_enum
&& !flag_enum
)
16078 TYPE_UNSIGNED (type
) = 1;
16080 TYPE_FLAG_ENUM (type
) = 1;
16083 /* Given a DW_AT_enumeration_type die, set its type. We do not
16084 complete the type's fields yet, or create any symbols. */
16086 static struct type
*
16087 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16089 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16091 struct attribute
*attr
;
16094 /* If the definition of this type lives in .debug_types, read that type.
16095 Don't follow DW_AT_specification though, that will take us back up
16096 the chain and we want to go down. */
16097 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
16100 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16102 /* The type's CU may not be the same as CU.
16103 Ensure TYPE is recorded with CU in die_type_hash. */
16104 return set_die_type (die
, type
, cu
);
16107 type
= alloc_type (objfile
);
16109 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
16110 name
= dwarf2_full_name (NULL
, die
, cu
);
16112 TYPE_TAG_NAME (type
) = name
;
16114 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16117 struct type
*underlying_type
= die_type (die
, cu
);
16119 TYPE_TARGET_TYPE (type
) = underlying_type
;
16122 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16125 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16129 TYPE_LENGTH (type
) = 0;
16132 /* The enumeration DIE can be incomplete. In Ada, any type can be
16133 declared as private in the package spec, and then defined only
16134 inside the package body. Such types are known as Taft Amendment
16135 Types. When another package uses such a type, an incomplete DIE
16136 may be generated by the compiler. */
16137 if (die_is_declaration (die
, cu
))
16138 TYPE_STUB (type
) = 1;
16140 /* Finish the creation of this type by using the enum's children.
16141 We must call this even when the underlying type has been provided
16142 so that we can determine if we're looking at a "flag" enum. */
16143 update_enumeration_type_from_children (die
, type
, cu
);
16145 /* If this type has an underlying type that is not a stub, then we
16146 may use its attributes. We always use the "unsigned" attribute
16147 in this situation, because ordinarily we guess whether the type
16148 is unsigned -- but the guess can be wrong and the underlying type
16149 can tell us the reality. However, we defer to a local size
16150 attribute if one exists, because this lets the compiler override
16151 the underlying type if needed. */
16152 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16154 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
16155 if (TYPE_LENGTH (type
) == 0)
16156 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
16159 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16161 return set_die_type (die
, type
, cu
);
16164 /* Given a pointer to a die which begins an enumeration, process all
16165 the dies that define the members of the enumeration, and create the
16166 symbol for the enumeration type.
16168 NOTE: We reverse the order of the element list. */
16171 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16173 struct type
*this_type
;
16175 this_type
= get_die_type (die
, cu
);
16176 if (this_type
== NULL
)
16177 this_type
= read_enumeration_type (die
, cu
);
16179 if (die
->child
!= NULL
)
16181 struct die_info
*child_die
;
16182 struct symbol
*sym
;
16183 struct field
*fields
= NULL
;
16184 int num_fields
= 0;
16187 child_die
= die
->child
;
16188 while (child_die
&& child_die
->tag
)
16190 if (child_die
->tag
!= DW_TAG_enumerator
)
16192 process_die (child_die
, cu
);
16196 name
= dwarf2_name (child_die
, cu
);
16199 sym
= new_symbol (child_die
, this_type
, cu
);
16201 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
16203 fields
= (struct field
*)
16205 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
16206 * sizeof (struct field
));
16209 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
16210 FIELD_TYPE (fields
[num_fields
]) = NULL
;
16211 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
16212 FIELD_BITSIZE (fields
[num_fields
]) = 0;
16218 child_die
= sibling_die (child_die
);
16223 TYPE_NFIELDS (this_type
) = num_fields
;
16224 TYPE_FIELDS (this_type
) = (struct field
*)
16225 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
16226 memcpy (TYPE_FIELDS (this_type
), fields
,
16227 sizeof (struct field
) * num_fields
);
16232 /* If we are reading an enum from a .debug_types unit, and the enum
16233 is a declaration, and the enum is not the signatured type in the
16234 unit, then we do not want to add a symbol for it. Adding a
16235 symbol would in some cases obscure the true definition of the
16236 enum, giving users an incomplete type when the definition is
16237 actually available. Note that we do not want to do this for all
16238 enums which are just declarations, because C++0x allows forward
16239 enum declarations. */
16240 if (cu
->per_cu
->is_debug_types
16241 && die_is_declaration (die
, cu
))
16243 struct signatured_type
*sig_type
;
16245 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16246 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16247 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16251 new_symbol (die
, this_type
, cu
);
16254 /* Extract all information from a DW_TAG_array_type DIE and put it in
16255 the DIE's type field. For now, this only handles one dimensional
16258 static struct type
*
16259 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16261 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16262 struct die_info
*child_die
;
16264 struct type
*element_type
, *range_type
, *index_type
;
16265 struct attribute
*attr
;
16267 struct dynamic_prop
*byte_stride_prop
= NULL
;
16268 unsigned int bit_stride
= 0;
16270 element_type
= die_type (die
, cu
);
16272 /* The die_type call above may have already set the type for this DIE. */
16273 type
= get_die_type (die
, cu
);
16277 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16283 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16284 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
);
16287 complaint (&symfile_complaints
,
16288 _("unable to read array DW_AT_byte_stride "
16289 " - DIE at %s [in module %s]"),
16290 sect_offset_str (die
->sect_off
),
16291 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16292 /* Ignore this attribute. We will likely not be able to print
16293 arrays of this type correctly, but there is little we can do
16294 to help if we cannot read the attribute's value. */
16295 byte_stride_prop
= NULL
;
16299 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16301 bit_stride
= DW_UNSND (attr
);
16303 /* Irix 6.2 native cc creates array types without children for
16304 arrays with unspecified length. */
16305 if (die
->child
== NULL
)
16307 index_type
= objfile_type (objfile
)->builtin_int
;
16308 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16309 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16310 byte_stride_prop
, bit_stride
);
16311 return set_die_type (die
, type
, cu
);
16314 std::vector
<struct type
*> range_types
;
16315 child_die
= die
->child
;
16316 while (child_die
&& child_die
->tag
)
16318 if (child_die
->tag
== DW_TAG_subrange_type
)
16320 struct type
*child_type
= read_type_die (child_die
, cu
);
16322 if (child_type
!= NULL
)
16324 /* The range type was succesfully read. Save it for the
16325 array type creation. */
16326 range_types
.push_back (child_type
);
16329 child_die
= sibling_die (child_die
);
16332 /* Dwarf2 dimensions are output from left to right, create the
16333 necessary array types in backwards order. */
16335 type
= element_type
;
16337 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16341 while (i
< range_types
.size ())
16342 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16343 byte_stride_prop
, bit_stride
);
16347 size_t ndim
= range_types
.size ();
16349 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16350 byte_stride_prop
, bit_stride
);
16353 /* Understand Dwarf2 support for vector types (like they occur on
16354 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16355 array type. This is not part of the Dwarf2/3 standard yet, but a
16356 custom vendor extension. The main difference between a regular
16357 array and the vector variant is that vectors are passed by value
16359 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16361 make_vector_type (type
);
16363 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16364 implementation may choose to implement triple vectors using this
16366 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16369 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16370 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16372 complaint (&symfile_complaints
,
16373 _("DW_AT_byte_size for array type smaller "
16374 "than the total size of elements"));
16377 name
= dwarf2_name (die
, cu
);
16379 TYPE_NAME (type
) = name
;
16381 /* Install the type in the die. */
16382 set_die_type (die
, type
, cu
);
16384 /* set_die_type should be already done. */
16385 set_descriptive_type (type
, die
, cu
);
16390 static enum dwarf_array_dim_ordering
16391 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16393 struct attribute
*attr
;
16395 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16398 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16400 /* GNU F77 is a special case, as at 08/2004 array type info is the
16401 opposite order to the dwarf2 specification, but data is still
16402 laid out as per normal fortran.
16404 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16405 version checking. */
16407 if (cu
->language
== language_fortran
16408 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16410 return DW_ORD_row_major
;
16413 switch (cu
->language_defn
->la_array_ordering
)
16415 case array_column_major
:
16416 return DW_ORD_col_major
;
16417 case array_row_major
:
16419 return DW_ORD_row_major
;
16423 /* Extract all information from a DW_TAG_set_type DIE and put it in
16424 the DIE's type field. */
16426 static struct type
*
16427 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16429 struct type
*domain_type
, *set_type
;
16430 struct attribute
*attr
;
16432 domain_type
= die_type (die
, cu
);
16434 /* The die_type call above may have already set the type for this DIE. */
16435 set_type
= get_die_type (die
, cu
);
16439 set_type
= create_set_type (NULL
, domain_type
);
16441 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16443 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16445 return set_die_type (die
, set_type
, cu
);
16448 /* A helper for read_common_block that creates a locexpr baton.
16449 SYM is the symbol which we are marking as computed.
16450 COMMON_DIE is the DIE for the common block.
16451 COMMON_LOC is the location expression attribute for the common
16453 MEMBER_LOC is the location expression attribute for the particular
16454 member of the common block that we are processing.
16455 CU is the CU from which the above come. */
16458 mark_common_block_symbol_computed (struct symbol
*sym
,
16459 struct die_info
*common_die
,
16460 struct attribute
*common_loc
,
16461 struct attribute
*member_loc
,
16462 struct dwarf2_cu
*cu
)
16464 struct dwarf2_per_objfile
*dwarf2_per_objfile
16465 = cu
->per_cu
->dwarf2_per_objfile
;
16466 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16467 struct dwarf2_locexpr_baton
*baton
;
16469 unsigned int cu_off
;
16470 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
16471 LONGEST offset
= 0;
16473 gdb_assert (common_loc
&& member_loc
);
16474 gdb_assert (attr_form_is_block (common_loc
));
16475 gdb_assert (attr_form_is_block (member_loc
)
16476 || attr_form_is_constant (member_loc
));
16478 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16479 baton
->per_cu
= cu
->per_cu
;
16480 gdb_assert (baton
->per_cu
);
16482 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16484 if (attr_form_is_constant (member_loc
))
16486 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
16487 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16490 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16492 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16495 *ptr
++ = DW_OP_call4
;
16496 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16497 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16500 if (attr_form_is_constant (member_loc
))
16502 *ptr
++ = DW_OP_addr
;
16503 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16504 ptr
+= cu
->header
.addr_size
;
16508 /* We have to copy the data here, because DW_OP_call4 will only
16509 use a DW_AT_location attribute. */
16510 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16511 ptr
+= DW_BLOCK (member_loc
)->size
;
16514 *ptr
++ = DW_OP_plus
;
16515 gdb_assert (ptr
- baton
->data
== baton
->size
);
16517 SYMBOL_LOCATION_BATON (sym
) = baton
;
16518 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16521 /* Create appropriate locally-scoped variables for all the
16522 DW_TAG_common_block entries. Also create a struct common_block
16523 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16524 is used to sepate the common blocks name namespace from regular
16528 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16530 struct attribute
*attr
;
16532 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16535 /* Support the .debug_loc offsets. */
16536 if (attr_form_is_block (attr
))
16540 else if (attr_form_is_section_offset (attr
))
16542 dwarf2_complex_location_expr_complaint ();
16547 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16548 "common block member");
16553 if (die
->child
!= NULL
)
16555 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16556 struct die_info
*child_die
;
16557 size_t n_entries
= 0, size
;
16558 struct common_block
*common_block
;
16559 struct symbol
*sym
;
16561 for (child_die
= die
->child
;
16562 child_die
&& child_die
->tag
;
16563 child_die
= sibling_die (child_die
))
16566 size
= (sizeof (struct common_block
)
16567 + (n_entries
- 1) * sizeof (struct symbol
*));
16569 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16571 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16572 common_block
->n_entries
= 0;
16574 for (child_die
= die
->child
;
16575 child_die
&& child_die
->tag
;
16576 child_die
= sibling_die (child_die
))
16578 /* Create the symbol in the DW_TAG_common_block block in the current
16580 sym
= new_symbol (child_die
, NULL
, cu
);
16583 struct attribute
*member_loc
;
16585 common_block
->contents
[common_block
->n_entries
++] = sym
;
16587 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16591 /* GDB has handled this for a long time, but it is
16592 not specified by DWARF. It seems to have been
16593 emitted by gfortran at least as recently as:
16594 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16595 complaint (&symfile_complaints
,
16596 _("Variable in common block has "
16597 "DW_AT_data_member_location "
16598 "- DIE at %s [in module %s]"),
16599 sect_offset_str (child_die
->sect_off
),
16600 objfile_name (objfile
));
16602 if (attr_form_is_section_offset (member_loc
))
16603 dwarf2_complex_location_expr_complaint ();
16604 else if (attr_form_is_constant (member_loc
)
16605 || attr_form_is_block (member_loc
))
16608 mark_common_block_symbol_computed (sym
, die
, attr
,
16612 dwarf2_complex_location_expr_complaint ();
16617 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16618 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16622 /* Create a type for a C++ namespace. */
16624 static struct type
*
16625 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16627 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16628 const char *previous_prefix
, *name
;
16632 /* For extensions, reuse the type of the original namespace. */
16633 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16635 struct die_info
*ext_die
;
16636 struct dwarf2_cu
*ext_cu
= cu
;
16638 ext_die
= dwarf2_extension (die
, &ext_cu
);
16639 type
= read_type_die (ext_die
, ext_cu
);
16641 /* EXT_CU may not be the same as CU.
16642 Ensure TYPE is recorded with CU in die_type_hash. */
16643 return set_die_type (die
, type
, cu
);
16646 name
= namespace_name (die
, &is_anonymous
, cu
);
16648 /* Now build the name of the current namespace. */
16650 previous_prefix
= determine_prefix (die
, cu
);
16651 if (previous_prefix
[0] != '\0')
16652 name
= typename_concat (&objfile
->objfile_obstack
,
16653 previous_prefix
, name
, 0, cu
);
16655 /* Create the type. */
16656 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16657 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
16659 return set_die_type (die
, type
, cu
);
16662 /* Read a namespace scope. */
16665 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16667 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16670 /* Add a symbol associated to this if we haven't seen the namespace
16671 before. Also, add a using directive if it's an anonymous
16674 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16678 type
= read_type_die (die
, cu
);
16679 new_symbol (die
, type
, cu
);
16681 namespace_name (die
, &is_anonymous
, cu
);
16684 const char *previous_prefix
= determine_prefix (die
, cu
);
16686 std::vector
<const char *> excludes
;
16687 add_using_directive (using_directives (cu
->language
),
16688 previous_prefix
, TYPE_NAME (type
), NULL
,
16689 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16693 if (die
->child
!= NULL
)
16695 struct die_info
*child_die
= die
->child
;
16697 while (child_die
&& child_die
->tag
)
16699 process_die (child_die
, cu
);
16700 child_die
= sibling_die (child_die
);
16705 /* Read a Fortran module as type. This DIE can be only a declaration used for
16706 imported module. Still we need that type as local Fortran "use ... only"
16707 declaration imports depend on the created type in determine_prefix. */
16709 static struct type
*
16710 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16712 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16713 const char *module_name
;
16716 module_name
= dwarf2_name (die
, cu
);
16718 complaint (&symfile_complaints
,
16719 _("DW_TAG_module has no name, offset %s"),
16720 sect_offset_str (die
->sect_off
));
16721 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16723 /* determine_prefix uses TYPE_TAG_NAME. */
16724 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
16726 return set_die_type (die
, type
, cu
);
16729 /* Read a Fortran module. */
16732 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16734 struct die_info
*child_die
= die
->child
;
16737 type
= read_type_die (die
, cu
);
16738 new_symbol (die
, type
, cu
);
16740 while (child_die
&& child_die
->tag
)
16742 process_die (child_die
, cu
);
16743 child_die
= sibling_die (child_die
);
16747 /* Return the name of the namespace represented by DIE. Set
16748 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16751 static const char *
16752 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16754 struct die_info
*current_die
;
16755 const char *name
= NULL
;
16757 /* Loop through the extensions until we find a name. */
16759 for (current_die
= die
;
16760 current_die
!= NULL
;
16761 current_die
= dwarf2_extension (die
, &cu
))
16763 /* We don't use dwarf2_name here so that we can detect the absence
16764 of a name -> anonymous namespace. */
16765 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16771 /* Is it an anonymous namespace? */
16773 *is_anonymous
= (name
== NULL
);
16775 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16780 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16781 the user defined type vector. */
16783 static struct type
*
16784 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16786 struct gdbarch
*gdbarch
16787 = get_objfile_arch (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16788 struct comp_unit_head
*cu_header
= &cu
->header
;
16790 struct attribute
*attr_byte_size
;
16791 struct attribute
*attr_address_class
;
16792 int byte_size
, addr_class
;
16793 struct type
*target_type
;
16795 target_type
= die_type (die
, cu
);
16797 /* The die_type call above may have already set the type for this DIE. */
16798 type
= get_die_type (die
, cu
);
16802 type
= lookup_pointer_type (target_type
);
16804 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16805 if (attr_byte_size
)
16806 byte_size
= DW_UNSND (attr_byte_size
);
16808 byte_size
= cu_header
->addr_size
;
16810 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16811 if (attr_address_class
)
16812 addr_class
= DW_UNSND (attr_address_class
);
16814 addr_class
= DW_ADDR_none
;
16816 /* If the pointer size or address class is different than the
16817 default, create a type variant marked as such and set the
16818 length accordingly. */
16819 if (TYPE_LENGTH (type
) != byte_size
|| addr_class
!= DW_ADDR_none
)
16821 if (gdbarch_address_class_type_flags_p (gdbarch
))
16825 type_flags
= gdbarch_address_class_type_flags
16826 (gdbarch
, byte_size
, addr_class
);
16827 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16829 type
= make_type_with_address_space (type
, type_flags
);
16831 else if (TYPE_LENGTH (type
) != byte_size
)
16833 complaint (&symfile_complaints
,
16834 _("invalid pointer size %d"), byte_size
);
16838 /* Should we also complain about unhandled address classes? */
16842 TYPE_LENGTH (type
) = byte_size
;
16843 return set_die_type (die
, type
, cu
);
16846 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16847 the user defined type vector. */
16849 static struct type
*
16850 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16853 struct type
*to_type
;
16854 struct type
*domain
;
16856 to_type
= die_type (die
, cu
);
16857 domain
= die_containing_type (die
, cu
);
16859 /* The calls above may have already set the type for this DIE. */
16860 type
= get_die_type (die
, cu
);
16864 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
16865 type
= lookup_methodptr_type (to_type
);
16866 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
16868 struct type
*new_type
16869 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16871 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
16872 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
16873 TYPE_VARARGS (to_type
));
16874 type
= lookup_methodptr_type (new_type
);
16877 type
= lookup_memberptr_type (to_type
, domain
);
16879 return set_die_type (die
, type
, cu
);
16882 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
16883 the user defined type vector. */
16885 static struct type
*
16886 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16887 enum type_code refcode
)
16889 struct comp_unit_head
*cu_header
= &cu
->header
;
16890 struct type
*type
, *target_type
;
16891 struct attribute
*attr
;
16893 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
16895 target_type
= die_type (die
, cu
);
16897 /* The die_type call above may have already set the type for this DIE. */
16898 type
= get_die_type (die
, cu
);
16902 type
= lookup_reference_type (target_type
, refcode
);
16903 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16906 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16910 TYPE_LENGTH (type
) = cu_header
->addr_size
;
16912 return set_die_type (die
, type
, cu
);
16915 /* Add the given cv-qualifiers to the element type of the array. GCC
16916 outputs DWARF type qualifiers that apply to an array, not the
16917 element type. But GDB relies on the array element type to carry
16918 the cv-qualifiers. This mimics section 6.7.3 of the C99
16921 static struct type
*
16922 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16923 struct type
*base_type
, int cnst
, int voltl
)
16925 struct type
*el_type
, *inner_array
;
16927 base_type
= copy_type (base_type
);
16928 inner_array
= base_type
;
16930 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
16932 TYPE_TARGET_TYPE (inner_array
) =
16933 copy_type (TYPE_TARGET_TYPE (inner_array
));
16934 inner_array
= TYPE_TARGET_TYPE (inner_array
);
16937 el_type
= TYPE_TARGET_TYPE (inner_array
);
16938 cnst
|= TYPE_CONST (el_type
);
16939 voltl
|= TYPE_VOLATILE (el_type
);
16940 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
16942 return set_die_type (die
, base_type
, cu
);
16945 static struct type
*
16946 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16948 struct type
*base_type
, *cv_type
;
16950 base_type
= die_type (die
, cu
);
16952 /* The die_type call above may have already set the type for this DIE. */
16953 cv_type
= get_die_type (die
, cu
);
16957 /* In case the const qualifier is applied to an array type, the element type
16958 is so qualified, not the array type (section 6.7.3 of C99). */
16959 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
16960 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
16962 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
16963 return set_die_type (die
, cv_type
, cu
);
16966 static struct type
*
16967 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16969 struct type
*base_type
, *cv_type
;
16971 base_type
= die_type (die
, cu
);
16973 /* The die_type call above may have already set the type for this DIE. */
16974 cv_type
= get_die_type (die
, cu
);
16978 /* In case the volatile qualifier is applied to an array type, the
16979 element type is so qualified, not the array type (section 6.7.3
16981 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
16982 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
16984 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
16985 return set_die_type (die
, cv_type
, cu
);
16988 /* Handle DW_TAG_restrict_type. */
16990 static struct type
*
16991 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16993 struct type
*base_type
, *cv_type
;
16995 base_type
= die_type (die
, cu
);
16997 /* The die_type call above may have already set the type for this DIE. */
16998 cv_type
= get_die_type (die
, cu
);
17002 cv_type
= make_restrict_type (base_type
);
17003 return set_die_type (die
, cv_type
, cu
);
17006 /* Handle DW_TAG_atomic_type. */
17008 static struct type
*
17009 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17011 struct type
*base_type
, *cv_type
;
17013 base_type
= die_type (die
, cu
);
17015 /* The die_type call above may have already set the type for this DIE. */
17016 cv_type
= get_die_type (die
, cu
);
17020 cv_type
= make_atomic_type (base_type
);
17021 return set_die_type (die
, cv_type
, cu
);
17024 /* Extract all information from a DW_TAG_string_type DIE and add to
17025 the user defined type vector. It isn't really a user defined type,
17026 but it behaves like one, with other DIE's using an AT_user_def_type
17027 attribute to reference it. */
17029 static struct type
*
17030 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17032 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17033 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17034 struct type
*type
, *range_type
, *index_type
, *char_type
;
17035 struct attribute
*attr
;
17036 unsigned int length
;
17038 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
17041 length
= DW_UNSND (attr
);
17045 /* Check for the DW_AT_byte_size attribute. */
17046 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17049 length
= DW_UNSND (attr
);
17057 index_type
= objfile_type (objfile
)->builtin_int
;
17058 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17059 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
17060 type
= create_string_type (NULL
, char_type
, range_type
);
17062 return set_die_type (die
, type
, cu
);
17065 /* Assuming that DIE corresponds to a function, returns nonzero
17066 if the function is prototyped. */
17069 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
17071 struct attribute
*attr
;
17073 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
17074 if (attr
&& (DW_UNSND (attr
) != 0))
17077 /* The DWARF standard implies that the DW_AT_prototyped attribute
17078 is only meaninful for C, but the concept also extends to other
17079 languages that allow unprototyped functions (Eg: Objective C).
17080 For all other languages, assume that functions are always
17082 if (cu
->language
!= language_c
17083 && cu
->language
!= language_objc
17084 && cu
->language
!= language_opencl
)
17087 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17088 prototyped and unprototyped functions; default to prototyped,
17089 since that is more common in modern code (and RealView warns
17090 about unprototyped functions). */
17091 if (producer_is_realview (cu
->producer
))
17097 /* Handle DIES due to C code like:
17101 int (*funcp)(int a, long l);
17105 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17107 static struct type
*
17108 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17110 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17111 struct type
*type
; /* Type that this function returns. */
17112 struct type
*ftype
; /* Function that returns above type. */
17113 struct attribute
*attr
;
17115 type
= die_type (die
, cu
);
17117 /* The die_type call above may have already set the type for this DIE. */
17118 ftype
= get_die_type (die
, cu
);
17122 ftype
= lookup_function_type (type
);
17124 if (prototyped_function_p (die
, cu
))
17125 TYPE_PROTOTYPED (ftype
) = 1;
17127 /* Store the calling convention in the type if it's available in
17128 the subroutine die. Otherwise set the calling convention to
17129 the default value DW_CC_normal. */
17130 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17132 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
17133 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17134 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17136 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17138 /* Record whether the function returns normally to its caller or not
17139 if the DWARF producer set that information. */
17140 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17141 if (attr
&& (DW_UNSND (attr
) != 0))
17142 TYPE_NO_RETURN (ftype
) = 1;
17144 /* We need to add the subroutine type to the die immediately so
17145 we don't infinitely recurse when dealing with parameters
17146 declared as the same subroutine type. */
17147 set_die_type (die
, ftype
, cu
);
17149 if (die
->child
!= NULL
)
17151 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17152 struct die_info
*child_die
;
17153 int nparams
, iparams
;
17155 /* Count the number of parameters.
17156 FIXME: GDB currently ignores vararg functions, but knows about
17157 vararg member functions. */
17159 child_die
= die
->child
;
17160 while (child_die
&& child_die
->tag
)
17162 if (child_die
->tag
== DW_TAG_formal_parameter
)
17164 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17165 TYPE_VARARGS (ftype
) = 1;
17166 child_die
= sibling_die (child_die
);
17169 /* Allocate storage for parameters and fill them in. */
17170 TYPE_NFIELDS (ftype
) = nparams
;
17171 TYPE_FIELDS (ftype
) = (struct field
*)
17172 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
17174 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17175 even if we error out during the parameters reading below. */
17176 for (iparams
= 0; iparams
< nparams
; iparams
++)
17177 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17180 child_die
= die
->child
;
17181 while (child_die
&& child_die
->tag
)
17183 if (child_die
->tag
== DW_TAG_formal_parameter
)
17185 struct type
*arg_type
;
17187 /* DWARF version 2 has no clean way to discern C++
17188 static and non-static member functions. G++ helps
17189 GDB by marking the first parameter for non-static
17190 member functions (which is the this pointer) as
17191 artificial. We pass this information to
17192 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17194 DWARF version 3 added DW_AT_object_pointer, which GCC
17195 4.5 does not yet generate. */
17196 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17198 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17200 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17201 arg_type
= die_type (child_die
, cu
);
17203 /* RealView does not mark THIS as const, which the testsuite
17204 expects. GCC marks THIS as const in method definitions,
17205 but not in the class specifications (GCC PR 43053). */
17206 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17207 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17210 struct dwarf2_cu
*arg_cu
= cu
;
17211 const char *name
= dwarf2_name (child_die
, cu
);
17213 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17216 /* If the compiler emits this, use it. */
17217 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17220 else if (name
&& strcmp (name
, "this") == 0)
17221 /* Function definitions will have the argument names. */
17223 else if (name
== NULL
&& iparams
== 0)
17224 /* Declarations may not have the names, so like
17225 elsewhere in GDB, assume an artificial first
17226 argument is "this". */
17230 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17234 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17237 child_die
= sibling_die (child_die
);
17244 static struct type
*
17245 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17247 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17248 const char *name
= NULL
;
17249 struct type
*this_type
, *target_type
;
17251 name
= dwarf2_full_name (NULL
, die
, cu
);
17252 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17253 TYPE_TARGET_STUB (this_type
) = 1;
17254 set_die_type (die
, this_type
, cu
);
17255 target_type
= die_type (die
, cu
);
17256 if (target_type
!= this_type
)
17257 TYPE_TARGET_TYPE (this_type
) = target_type
;
17260 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17261 spec and cause infinite loops in GDB. */
17262 complaint (&symfile_complaints
,
17263 _("Self-referential DW_TAG_typedef "
17264 "- DIE at %s [in module %s]"),
17265 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17266 TYPE_TARGET_TYPE (this_type
) = NULL
;
17271 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17272 (which may be different from NAME) to the architecture back-end to allow
17273 it to guess the correct format if necessary. */
17275 static struct type
*
17276 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17277 const char *name_hint
)
17279 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17280 const struct floatformat
**format
;
17283 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17285 type
= init_float_type (objfile
, bits
, name
, format
);
17287 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17292 /* Find a representation of a given base type and install
17293 it in the TYPE field of the die. */
17295 static struct type
*
17296 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17298 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17300 struct attribute
*attr
;
17301 int encoding
= 0, bits
= 0;
17304 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17307 encoding
= DW_UNSND (attr
);
17309 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17312 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17314 name
= dwarf2_name (die
, cu
);
17317 complaint (&symfile_complaints
,
17318 _("DW_AT_name missing from DW_TAG_base_type"));
17323 case DW_ATE_address
:
17324 /* Turn DW_ATE_address into a void * pointer. */
17325 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17326 type
= init_pointer_type (objfile
, bits
, name
, type
);
17328 case DW_ATE_boolean
:
17329 type
= init_boolean_type (objfile
, bits
, 1, name
);
17331 case DW_ATE_complex_float
:
17332 type
= dwarf2_init_float_type (objfile
, bits
/ 2, NULL
, name
);
17333 type
= init_complex_type (objfile
, name
, type
);
17335 case DW_ATE_decimal_float
:
17336 type
= init_decfloat_type (objfile
, bits
, name
);
17339 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
17341 case DW_ATE_signed
:
17342 type
= init_integer_type (objfile
, bits
, 0, name
);
17344 case DW_ATE_unsigned
:
17345 if (cu
->language
== language_fortran
17347 && startswith (name
, "character("))
17348 type
= init_character_type (objfile
, bits
, 1, name
);
17350 type
= init_integer_type (objfile
, bits
, 1, name
);
17352 case DW_ATE_signed_char
:
17353 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17354 || cu
->language
== language_pascal
17355 || cu
->language
== language_fortran
)
17356 type
= init_character_type (objfile
, bits
, 0, name
);
17358 type
= init_integer_type (objfile
, bits
, 0, name
);
17360 case DW_ATE_unsigned_char
:
17361 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17362 || cu
->language
== language_pascal
17363 || cu
->language
== language_fortran
17364 || cu
->language
== language_rust
)
17365 type
= init_character_type (objfile
, bits
, 1, name
);
17367 type
= init_integer_type (objfile
, bits
, 1, name
);
17371 gdbarch
*arch
= get_objfile_arch (objfile
);
17374 type
= builtin_type (arch
)->builtin_char16
;
17375 else if (bits
== 32)
17376 type
= builtin_type (arch
)->builtin_char32
;
17379 complaint (&symfile_complaints
,
17380 _("unsupported DW_ATE_UTF bit size: '%d'"),
17382 type
= init_integer_type (objfile
, bits
, 1, name
);
17384 return set_die_type (die
, type
, cu
);
17389 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
17390 dwarf_type_encoding_name (encoding
));
17391 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17395 if (name
&& strcmp (name
, "char") == 0)
17396 TYPE_NOSIGN (type
) = 1;
17398 return set_die_type (die
, type
, cu
);
17401 /* Parse dwarf attribute if it's a block, reference or constant and put the
17402 resulting value of the attribute into struct bound_prop.
17403 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17406 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17407 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
17409 struct dwarf2_property_baton
*baton
;
17410 struct obstack
*obstack
17411 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17413 if (attr
== NULL
|| prop
== NULL
)
17416 if (attr_form_is_block (attr
))
17418 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17419 baton
->referenced_type
= NULL
;
17420 baton
->locexpr
.per_cu
= cu
->per_cu
;
17421 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17422 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17423 prop
->data
.baton
= baton
;
17424 prop
->kind
= PROP_LOCEXPR
;
17425 gdb_assert (prop
->data
.baton
!= NULL
);
17427 else if (attr_form_is_ref (attr
))
17429 struct dwarf2_cu
*target_cu
= cu
;
17430 struct die_info
*target_die
;
17431 struct attribute
*target_attr
;
17433 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17434 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17435 if (target_attr
== NULL
)
17436 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17438 if (target_attr
== NULL
)
17441 switch (target_attr
->name
)
17443 case DW_AT_location
:
17444 if (attr_form_is_section_offset (target_attr
))
17446 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17447 baton
->referenced_type
= die_type (target_die
, target_cu
);
17448 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17449 prop
->data
.baton
= baton
;
17450 prop
->kind
= PROP_LOCLIST
;
17451 gdb_assert (prop
->data
.baton
!= NULL
);
17453 else if (attr_form_is_block (target_attr
))
17455 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17456 baton
->referenced_type
= die_type (target_die
, target_cu
);
17457 baton
->locexpr
.per_cu
= cu
->per_cu
;
17458 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17459 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17460 prop
->data
.baton
= baton
;
17461 prop
->kind
= PROP_LOCEXPR
;
17462 gdb_assert (prop
->data
.baton
!= NULL
);
17466 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17467 "dynamic property");
17471 case DW_AT_data_member_location
:
17475 if (!handle_data_member_location (target_die
, target_cu
,
17479 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17480 baton
->referenced_type
= read_type_die (target_die
->parent
,
17482 baton
->offset_info
.offset
= offset
;
17483 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17484 prop
->data
.baton
= baton
;
17485 prop
->kind
= PROP_ADDR_OFFSET
;
17490 else if (attr_form_is_constant (attr
))
17492 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
17493 prop
->kind
= PROP_CONST
;
17497 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17498 dwarf2_name (die
, cu
));
17505 /* Read the given DW_AT_subrange DIE. */
17507 static struct type
*
17508 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17510 struct type
*base_type
, *orig_base_type
;
17511 struct type
*range_type
;
17512 struct attribute
*attr
;
17513 struct dynamic_prop low
, high
;
17514 int low_default_is_valid
;
17515 int high_bound_is_count
= 0;
17517 LONGEST negative_mask
;
17519 orig_base_type
= die_type (die
, cu
);
17520 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17521 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17522 creating the range type, but we use the result of check_typedef
17523 when examining properties of the type. */
17524 base_type
= check_typedef (orig_base_type
);
17526 /* The die_type call above may have already set the type for this DIE. */
17527 range_type
= get_die_type (die
, cu
);
17531 low
.kind
= PROP_CONST
;
17532 high
.kind
= PROP_CONST
;
17533 high
.data
.const_val
= 0;
17535 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17536 omitting DW_AT_lower_bound. */
17537 switch (cu
->language
)
17540 case language_cplus
:
17541 low
.data
.const_val
= 0;
17542 low_default_is_valid
= 1;
17544 case language_fortran
:
17545 low
.data
.const_val
= 1;
17546 low_default_is_valid
= 1;
17549 case language_objc
:
17550 case language_rust
:
17551 low
.data
.const_val
= 0;
17552 low_default_is_valid
= (cu
->header
.version
>= 4);
17556 case language_pascal
:
17557 low
.data
.const_val
= 1;
17558 low_default_is_valid
= (cu
->header
.version
>= 4);
17561 low
.data
.const_val
= 0;
17562 low_default_is_valid
= 0;
17566 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17568 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
17569 else if (!low_default_is_valid
)
17570 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
17571 "- DIE at %s [in module %s]"),
17572 sect_offset_str (die
->sect_off
),
17573 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17575 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17576 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17578 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
17579 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17581 /* If bounds are constant do the final calculation here. */
17582 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17583 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17585 high_bound_is_count
= 1;
17589 /* Dwarf-2 specifications explicitly allows to create subrange types
17590 without specifying a base type.
17591 In that case, the base type must be set to the type of
17592 the lower bound, upper bound or count, in that order, if any of these
17593 three attributes references an object that has a type.
17594 If no base type is found, the Dwarf-2 specifications say that
17595 a signed integer type of size equal to the size of an address should
17597 For the following C code: `extern char gdb_int [];'
17598 GCC produces an empty range DIE.
17599 FIXME: muller/2010-05-28: Possible references to object for low bound,
17600 high bound or count are not yet handled by this code. */
17601 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
17603 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17604 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17605 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
17606 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
17608 /* Test "int", "long int", and "long long int" objfile types,
17609 and select the first one having a size above or equal to the
17610 architecture address size. */
17611 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17612 base_type
= int_type
;
17615 int_type
= objfile_type (objfile
)->builtin_long
;
17616 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17617 base_type
= int_type
;
17620 int_type
= objfile_type (objfile
)->builtin_long_long
;
17621 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17622 base_type
= int_type
;
17627 /* Normally, the DWARF producers are expected to use a signed
17628 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17629 But this is unfortunately not always the case, as witnessed
17630 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17631 is used instead. To work around that ambiguity, we treat
17632 the bounds as signed, and thus sign-extend their values, when
17633 the base type is signed. */
17635 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17636 if (low
.kind
== PROP_CONST
17637 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17638 low
.data
.const_val
|= negative_mask
;
17639 if (high
.kind
== PROP_CONST
17640 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17641 high
.data
.const_val
|= negative_mask
;
17643 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
17645 if (high_bound_is_count
)
17646 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17648 /* Ada expects an empty array on no boundary attributes. */
17649 if (attr
== NULL
&& cu
->language
!= language_ada
)
17650 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17652 name
= dwarf2_name (die
, cu
);
17654 TYPE_NAME (range_type
) = name
;
17656 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17658 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17660 set_die_type (die
, range_type
, cu
);
17662 /* set_die_type should be already done. */
17663 set_descriptive_type (range_type
, die
, cu
);
17668 static struct type
*
17669 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17673 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
17675 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
17677 /* In Ada, an unspecified type is typically used when the description
17678 of the type is defered to a different unit. When encountering
17679 such a type, we treat it as a stub, and try to resolve it later on,
17681 if (cu
->language
== language_ada
)
17682 TYPE_STUB (type
) = 1;
17684 return set_die_type (die
, type
, cu
);
17687 /* Read a single die and all its descendents. Set the die's sibling
17688 field to NULL; set other fields in the die correctly, and set all
17689 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17690 location of the info_ptr after reading all of those dies. PARENT
17691 is the parent of the die in question. */
17693 static struct die_info
*
17694 read_die_and_children (const struct die_reader_specs
*reader
,
17695 const gdb_byte
*info_ptr
,
17696 const gdb_byte
**new_info_ptr
,
17697 struct die_info
*parent
)
17699 struct die_info
*die
;
17700 const gdb_byte
*cur_ptr
;
17703 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
17706 *new_info_ptr
= cur_ptr
;
17709 store_in_ref_table (die
, reader
->cu
);
17712 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17716 *new_info_ptr
= cur_ptr
;
17719 die
->sibling
= NULL
;
17720 die
->parent
= parent
;
17724 /* Read a die, all of its descendents, and all of its siblings; set
17725 all of the fields of all of the dies correctly. Arguments are as
17726 in read_die_and_children. */
17728 static struct die_info
*
17729 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17730 const gdb_byte
*info_ptr
,
17731 const gdb_byte
**new_info_ptr
,
17732 struct die_info
*parent
)
17734 struct die_info
*first_die
, *last_sibling
;
17735 const gdb_byte
*cur_ptr
;
17737 cur_ptr
= info_ptr
;
17738 first_die
= last_sibling
= NULL
;
17742 struct die_info
*die
17743 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17747 *new_info_ptr
= cur_ptr
;
17754 last_sibling
->sibling
= die
;
17756 last_sibling
= die
;
17760 /* Read a die, all of its descendents, and all of its siblings; set
17761 all of the fields of all of the dies correctly. Arguments are as
17762 in read_die_and_children.
17763 This the main entry point for reading a DIE and all its children. */
17765 static struct die_info
*
17766 read_die_and_siblings (const struct die_reader_specs
*reader
,
17767 const gdb_byte
*info_ptr
,
17768 const gdb_byte
**new_info_ptr
,
17769 struct die_info
*parent
)
17771 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17772 new_info_ptr
, parent
);
17774 if (dwarf_die_debug
)
17776 fprintf_unfiltered (gdb_stdlog
,
17777 "Read die from %s@0x%x of %s:\n",
17778 get_section_name (reader
->die_section
),
17779 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17780 bfd_get_filename (reader
->abfd
));
17781 dump_die (die
, dwarf_die_debug
);
17787 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
17789 The caller is responsible for filling in the extra attributes
17790 and updating (*DIEP)->num_attrs.
17791 Set DIEP to point to a newly allocated die with its information,
17792 except for its child, sibling, and parent fields.
17793 Set HAS_CHILDREN to tell whether the die has children or not. */
17795 static const gdb_byte
*
17796 read_full_die_1 (const struct die_reader_specs
*reader
,
17797 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17798 int *has_children
, int num_extra_attrs
)
17800 unsigned int abbrev_number
, bytes_read
, i
;
17801 struct abbrev_info
*abbrev
;
17802 struct die_info
*die
;
17803 struct dwarf2_cu
*cu
= reader
->cu
;
17804 bfd
*abfd
= reader
->abfd
;
17806 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
17807 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17808 info_ptr
+= bytes_read
;
17809 if (!abbrev_number
)
17816 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
17818 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
17820 bfd_get_filename (abfd
));
17822 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
17823 die
->sect_off
= sect_off
;
17824 die
->tag
= abbrev
->tag
;
17825 die
->abbrev
= abbrev_number
;
17827 /* Make the result usable.
17828 The caller needs to update num_attrs after adding the extra
17830 die
->num_attrs
= abbrev
->num_attrs
;
17832 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
17833 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
17837 *has_children
= abbrev
->has_children
;
17841 /* Read a die and all its attributes.
17842 Set DIEP to point to a newly allocated die with its information,
17843 except for its child, sibling, and parent fields.
17844 Set HAS_CHILDREN to tell whether the die has children or not. */
17846 static const gdb_byte
*
17847 read_full_die (const struct die_reader_specs
*reader
,
17848 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17851 const gdb_byte
*result
;
17853 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
17855 if (dwarf_die_debug
)
17857 fprintf_unfiltered (gdb_stdlog
,
17858 "Read die from %s@0x%x of %s:\n",
17859 get_section_name (reader
->die_section
),
17860 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17861 bfd_get_filename (reader
->abfd
));
17862 dump_die (*diep
, dwarf_die_debug
);
17868 /* Abbreviation tables.
17870 In DWARF version 2, the description of the debugging information is
17871 stored in a separate .debug_abbrev section. Before we read any
17872 dies from a section we read in all abbreviations and install them
17873 in a hash table. */
17875 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
17877 struct abbrev_info
*
17878 abbrev_table::alloc_abbrev ()
17880 struct abbrev_info
*abbrev
;
17882 abbrev
= XOBNEW (&abbrev_obstack
, struct abbrev_info
);
17883 memset (abbrev
, 0, sizeof (struct abbrev_info
));
17888 /* Add an abbreviation to the table. */
17891 abbrev_table::add_abbrev (unsigned int abbrev_number
,
17892 struct abbrev_info
*abbrev
)
17894 unsigned int hash_number
;
17896 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
17897 abbrev
->next
= m_abbrevs
[hash_number
];
17898 m_abbrevs
[hash_number
] = abbrev
;
17901 /* Look up an abbrev in the table.
17902 Returns NULL if the abbrev is not found. */
17904 struct abbrev_info
*
17905 abbrev_table::lookup_abbrev (unsigned int abbrev_number
)
17907 unsigned int hash_number
;
17908 struct abbrev_info
*abbrev
;
17910 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
17911 abbrev
= m_abbrevs
[hash_number
];
17915 if (abbrev
->number
== abbrev_number
)
17917 abbrev
= abbrev
->next
;
17922 /* Read in an abbrev table. */
17924 static abbrev_table_up
17925 abbrev_table_read_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
17926 struct dwarf2_section_info
*section
,
17927 sect_offset sect_off
)
17929 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
17930 bfd
*abfd
= get_section_bfd_owner (section
);
17931 const gdb_byte
*abbrev_ptr
;
17932 struct abbrev_info
*cur_abbrev
;
17933 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
17934 unsigned int abbrev_form
;
17935 struct attr_abbrev
*cur_attrs
;
17936 unsigned int allocated_attrs
;
17938 abbrev_table_up
abbrev_table (new struct abbrev_table (sect_off
));
17940 dwarf2_read_section (objfile
, section
);
17941 abbrev_ptr
= section
->buffer
+ to_underlying (sect_off
);
17942 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
17943 abbrev_ptr
+= bytes_read
;
17945 allocated_attrs
= ATTR_ALLOC_CHUNK
;
17946 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
17948 /* Loop until we reach an abbrev number of 0. */
17949 while (abbrev_number
)
17951 cur_abbrev
= abbrev_table
->alloc_abbrev ();
17953 /* read in abbrev header */
17954 cur_abbrev
->number
= abbrev_number
;
17956 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
17957 abbrev_ptr
+= bytes_read
;
17958 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
17961 /* now read in declarations */
17964 LONGEST implicit_const
;
17966 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
17967 abbrev_ptr
+= bytes_read
;
17968 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
17969 abbrev_ptr
+= bytes_read
;
17970 if (abbrev_form
== DW_FORM_implicit_const
)
17972 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
17974 abbrev_ptr
+= bytes_read
;
17978 /* Initialize it due to a false compiler warning. */
17979 implicit_const
= -1;
17982 if (abbrev_name
== 0)
17985 if (cur_abbrev
->num_attrs
== allocated_attrs
)
17987 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
17989 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
17992 cur_attrs
[cur_abbrev
->num_attrs
].name
17993 = (enum dwarf_attribute
) abbrev_name
;
17994 cur_attrs
[cur_abbrev
->num_attrs
].form
17995 = (enum dwarf_form
) abbrev_form
;
17996 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
17997 ++cur_abbrev
->num_attrs
;
18000 cur_abbrev
->attrs
=
18001 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
18002 cur_abbrev
->num_attrs
);
18003 memcpy (cur_abbrev
->attrs
, cur_attrs
,
18004 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
18006 abbrev_table
->add_abbrev (abbrev_number
, cur_abbrev
);
18008 /* Get next abbreviation.
18009 Under Irix6 the abbreviations for a compilation unit are not
18010 always properly terminated with an abbrev number of 0.
18011 Exit loop if we encounter an abbreviation which we have
18012 already read (which means we are about to read the abbreviations
18013 for the next compile unit) or if the end of the abbreviation
18014 table is reached. */
18015 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
18017 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18018 abbrev_ptr
+= bytes_read
;
18019 if (abbrev_table
->lookup_abbrev (abbrev_number
) != NULL
)
18024 return abbrev_table
;
18027 /* Returns nonzero if TAG represents a type that we might generate a partial
18031 is_type_tag_for_partial (int tag
)
18036 /* Some types that would be reasonable to generate partial symbols for,
18037 that we don't at present. */
18038 case DW_TAG_array_type
:
18039 case DW_TAG_file_type
:
18040 case DW_TAG_ptr_to_member_type
:
18041 case DW_TAG_set_type
:
18042 case DW_TAG_string_type
:
18043 case DW_TAG_subroutine_type
:
18045 case DW_TAG_base_type
:
18046 case DW_TAG_class_type
:
18047 case DW_TAG_interface_type
:
18048 case DW_TAG_enumeration_type
:
18049 case DW_TAG_structure_type
:
18050 case DW_TAG_subrange_type
:
18051 case DW_TAG_typedef
:
18052 case DW_TAG_union_type
:
18059 /* Load all DIEs that are interesting for partial symbols into memory. */
18061 static struct partial_die_info
*
18062 load_partial_dies (const struct die_reader_specs
*reader
,
18063 const gdb_byte
*info_ptr
, int building_psymtab
)
18065 struct dwarf2_cu
*cu
= reader
->cu
;
18066 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18067 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18068 unsigned int bytes_read
;
18069 unsigned int load_all
= 0;
18070 int nesting_level
= 1;
18075 gdb_assert (cu
->per_cu
!= NULL
);
18076 if (cu
->per_cu
->load_all_dies
)
18080 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18084 &cu
->comp_unit_obstack
,
18085 hashtab_obstack_allocate
,
18086 dummy_obstack_deallocate
);
18090 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18092 /* A NULL abbrev means the end of a series of children. */
18093 if (abbrev
== NULL
)
18095 if (--nesting_level
== 0)
18098 info_ptr
+= bytes_read
;
18099 last_die
= parent_die
;
18100 parent_die
= parent_die
->die_parent
;
18104 /* Check for template arguments. We never save these; if
18105 they're seen, we just mark the parent, and go on our way. */
18106 if (parent_die
!= NULL
18107 && cu
->language
== language_cplus
18108 && (abbrev
->tag
== DW_TAG_template_type_param
18109 || abbrev
->tag
== DW_TAG_template_value_param
))
18111 parent_die
->has_template_arguments
= 1;
18115 /* We don't need a partial DIE for the template argument. */
18116 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18121 /* We only recurse into c++ subprograms looking for template arguments.
18122 Skip their other children. */
18124 && cu
->language
== language_cplus
18125 && parent_die
!= NULL
18126 && parent_die
->tag
== DW_TAG_subprogram
)
18128 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18132 /* Check whether this DIE is interesting enough to save. Normally
18133 we would not be interested in members here, but there may be
18134 later variables referencing them via DW_AT_specification (for
18135 static members). */
18137 && !is_type_tag_for_partial (abbrev
->tag
)
18138 && abbrev
->tag
!= DW_TAG_constant
18139 && abbrev
->tag
!= DW_TAG_enumerator
18140 && abbrev
->tag
!= DW_TAG_subprogram
18141 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18142 && abbrev
->tag
!= DW_TAG_lexical_block
18143 && abbrev
->tag
!= DW_TAG_variable
18144 && abbrev
->tag
!= DW_TAG_namespace
18145 && abbrev
->tag
!= DW_TAG_module
18146 && abbrev
->tag
!= DW_TAG_member
18147 && abbrev
->tag
!= DW_TAG_imported_unit
18148 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18150 /* Otherwise we skip to the next sibling, if any. */
18151 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18155 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18158 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18160 /* This two-pass algorithm for processing partial symbols has a
18161 high cost in cache pressure. Thus, handle some simple cases
18162 here which cover the majority of C partial symbols. DIEs
18163 which neither have specification tags in them, nor could have
18164 specification tags elsewhere pointing at them, can simply be
18165 processed and discarded.
18167 This segment is also optional; scan_partial_symbols and
18168 add_partial_symbol will handle these DIEs if we chain
18169 them in normally. When compilers which do not emit large
18170 quantities of duplicate debug information are more common,
18171 this code can probably be removed. */
18173 /* Any complete simple types at the top level (pretty much all
18174 of them, for a language without namespaces), can be processed
18176 if (parent_die
== NULL
18177 && pdi
.has_specification
== 0
18178 && pdi
.is_declaration
== 0
18179 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18180 || pdi
.tag
== DW_TAG_base_type
18181 || pdi
.tag
== DW_TAG_subrange_type
))
18183 if (building_psymtab
&& pdi
.name
!= NULL
)
18184 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18185 VAR_DOMAIN
, LOC_TYPEDEF
,
18186 &objfile
->static_psymbols
,
18187 0, cu
->language
, objfile
);
18188 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18192 /* The exception for DW_TAG_typedef with has_children above is
18193 a workaround of GCC PR debug/47510. In the case of this complaint
18194 type_name_no_tag_or_error will error on such types later.
18196 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18197 it could not find the child DIEs referenced later, this is checked
18198 above. In correct DWARF DW_TAG_typedef should have no children. */
18200 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18201 complaint (&symfile_complaints
,
18202 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18203 "- DIE at %s [in module %s]"),
18204 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18206 /* If we're at the second level, and we're an enumerator, and
18207 our parent has no specification (meaning possibly lives in a
18208 namespace elsewhere), then we can add the partial symbol now
18209 instead of queueing it. */
18210 if (pdi
.tag
== DW_TAG_enumerator
18211 && parent_die
!= NULL
18212 && parent_die
->die_parent
== NULL
18213 && parent_die
->tag
== DW_TAG_enumeration_type
18214 && parent_die
->has_specification
== 0)
18216 if (pdi
.name
== NULL
)
18217 complaint (&symfile_complaints
,
18218 _("malformed enumerator DIE ignored"));
18219 else if (building_psymtab
)
18220 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18221 VAR_DOMAIN
, LOC_CONST
,
18222 cu
->language
== language_cplus
18223 ? &objfile
->global_psymbols
18224 : &objfile
->static_psymbols
,
18225 0, cu
->language
, objfile
);
18227 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18231 struct partial_die_info
*part_die
18232 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18234 /* We'll save this DIE so link it in. */
18235 part_die
->die_parent
= parent_die
;
18236 part_die
->die_sibling
= NULL
;
18237 part_die
->die_child
= NULL
;
18239 if (last_die
&& last_die
== parent_die
)
18240 last_die
->die_child
= part_die
;
18242 last_die
->die_sibling
= part_die
;
18244 last_die
= part_die
;
18246 if (first_die
== NULL
)
18247 first_die
= part_die
;
18249 /* Maybe add the DIE to the hash table. Not all DIEs that we
18250 find interesting need to be in the hash table, because we
18251 also have the parent/sibling/child chains; only those that we
18252 might refer to by offset later during partial symbol reading.
18254 For now this means things that might have be the target of a
18255 DW_AT_specification, DW_AT_abstract_origin, or
18256 DW_AT_extension. DW_AT_extension will refer only to
18257 namespaces; DW_AT_abstract_origin refers to functions (and
18258 many things under the function DIE, but we do not recurse
18259 into function DIEs during partial symbol reading) and
18260 possibly variables as well; DW_AT_specification refers to
18261 declarations. Declarations ought to have the DW_AT_declaration
18262 flag. It happens that GCC forgets to put it in sometimes, but
18263 only for functions, not for types.
18265 Adding more things than necessary to the hash table is harmless
18266 except for the performance cost. Adding too few will result in
18267 wasted time in find_partial_die, when we reread the compilation
18268 unit with load_all_dies set. */
18271 || abbrev
->tag
== DW_TAG_constant
18272 || abbrev
->tag
== DW_TAG_subprogram
18273 || abbrev
->tag
== DW_TAG_variable
18274 || abbrev
->tag
== DW_TAG_namespace
18275 || part_die
->is_declaration
)
18279 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18280 to_underlying (part_die
->sect_off
),
18285 /* For some DIEs we want to follow their children (if any). For C
18286 we have no reason to follow the children of structures; for other
18287 languages we have to, so that we can get at method physnames
18288 to infer fully qualified class names, for DW_AT_specification,
18289 and for C++ template arguments. For C++, we also look one level
18290 inside functions to find template arguments (if the name of the
18291 function does not already contain the template arguments).
18293 For Ada, we need to scan the children of subprograms and lexical
18294 blocks as well because Ada allows the definition of nested
18295 entities that could be interesting for the debugger, such as
18296 nested subprograms for instance. */
18297 if (last_die
->has_children
18299 || last_die
->tag
== DW_TAG_namespace
18300 || last_die
->tag
== DW_TAG_module
18301 || last_die
->tag
== DW_TAG_enumeration_type
18302 || (cu
->language
== language_cplus
18303 && last_die
->tag
== DW_TAG_subprogram
18304 && (last_die
->name
== NULL
18305 || strchr (last_die
->name
, '<') == NULL
))
18306 || (cu
->language
!= language_c
18307 && (last_die
->tag
== DW_TAG_class_type
18308 || last_die
->tag
== DW_TAG_interface_type
18309 || last_die
->tag
== DW_TAG_structure_type
18310 || last_die
->tag
== DW_TAG_union_type
))
18311 || (cu
->language
== language_ada
18312 && (last_die
->tag
== DW_TAG_subprogram
18313 || last_die
->tag
== DW_TAG_lexical_block
))))
18316 parent_die
= last_die
;
18320 /* Otherwise we skip to the next sibling, if any. */
18321 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18323 /* Back to the top, do it again. */
18327 partial_die_info::partial_die_info (sect_offset sect_off_
,
18328 struct abbrev_info
*abbrev
)
18329 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18333 /* Read a minimal amount of information into the minimal die structure.
18334 INFO_PTR should point just after the initial uleb128 of a DIE. */
18337 partial_die_info::read (const struct die_reader_specs
*reader
,
18338 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18340 struct dwarf2_cu
*cu
= reader
->cu
;
18341 struct dwarf2_per_objfile
*dwarf2_per_objfile
18342 = cu
->per_cu
->dwarf2_per_objfile
;
18344 int has_low_pc_attr
= 0;
18345 int has_high_pc_attr
= 0;
18346 int high_pc_relative
= 0;
18348 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18350 struct attribute attr
;
18352 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
], info_ptr
);
18354 /* Store the data if it is of an attribute we want to keep in a
18355 partial symbol table. */
18361 case DW_TAG_compile_unit
:
18362 case DW_TAG_partial_unit
:
18363 case DW_TAG_type_unit
:
18364 /* Compilation units have a DW_AT_name that is a filename, not
18365 a source language identifier. */
18366 case DW_TAG_enumeration_type
:
18367 case DW_TAG_enumerator
:
18368 /* These tags always have simple identifiers already; no need
18369 to canonicalize them. */
18370 name
= DW_STRING (&attr
);
18374 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18377 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
18378 &objfile
->per_bfd
->storage_obstack
);
18383 case DW_AT_linkage_name
:
18384 case DW_AT_MIPS_linkage_name
:
18385 /* Note that both forms of linkage name might appear. We
18386 assume they will be the same, and we only store the last
18388 if (cu
->language
== language_ada
)
18389 name
= DW_STRING (&attr
);
18390 linkage_name
= DW_STRING (&attr
);
18393 has_low_pc_attr
= 1;
18394 lowpc
= attr_value_as_address (&attr
);
18396 case DW_AT_high_pc
:
18397 has_high_pc_attr
= 1;
18398 highpc
= attr_value_as_address (&attr
);
18399 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
18400 high_pc_relative
= 1;
18402 case DW_AT_location
:
18403 /* Support the .debug_loc offsets. */
18404 if (attr_form_is_block (&attr
))
18406 d
.locdesc
= DW_BLOCK (&attr
);
18408 else if (attr_form_is_section_offset (&attr
))
18410 dwarf2_complex_location_expr_complaint ();
18414 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18415 "partial symbol information");
18418 case DW_AT_external
:
18419 is_external
= DW_UNSND (&attr
);
18421 case DW_AT_declaration
:
18422 is_declaration
= DW_UNSND (&attr
);
18427 case DW_AT_abstract_origin
:
18428 case DW_AT_specification
:
18429 case DW_AT_extension
:
18430 has_specification
= 1;
18431 spec_offset
= dwarf2_get_ref_die_offset (&attr
);
18432 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18433 || cu
->per_cu
->is_dwz
);
18435 case DW_AT_sibling
:
18436 /* Ignore absolute siblings, they might point outside of
18437 the current compile unit. */
18438 if (attr
.form
== DW_FORM_ref_addr
)
18439 complaint (&symfile_complaints
,
18440 _("ignoring absolute DW_AT_sibling"));
18443 const gdb_byte
*buffer
= reader
->buffer
;
18444 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
18445 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18447 if (sibling_ptr
< info_ptr
)
18448 complaint (&symfile_complaints
,
18449 _("DW_AT_sibling points backwards"));
18450 else if (sibling_ptr
> reader
->buffer_end
)
18451 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
18453 sibling
= sibling_ptr
;
18456 case DW_AT_byte_size
:
18459 case DW_AT_const_value
:
18460 has_const_value
= 1;
18462 case DW_AT_calling_convention
:
18463 /* DWARF doesn't provide a way to identify a program's source-level
18464 entry point. DW_AT_calling_convention attributes are only meant
18465 to describe functions' calling conventions.
18467 However, because it's a necessary piece of information in
18468 Fortran, and before DWARF 4 DW_CC_program was the only
18469 piece of debugging information whose definition refers to
18470 a 'main program' at all, several compilers marked Fortran
18471 main programs with DW_CC_program --- even when those
18472 functions use the standard calling conventions.
18474 Although DWARF now specifies a way to provide this
18475 information, we support this practice for backward
18477 if (DW_UNSND (&attr
) == DW_CC_program
18478 && cu
->language
== language_fortran
)
18479 main_subprogram
= 1;
18482 if (DW_UNSND (&attr
) == DW_INL_inlined
18483 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18484 may_be_inlined
= 1;
18488 if (tag
== DW_TAG_imported_unit
)
18490 d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
18491 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18492 || cu
->per_cu
->is_dwz
);
18496 case DW_AT_main_subprogram
:
18497 main_subprogram
= DW_UNSND (&attr
);
18505 if (high_pc_relative
)
18508 if (has_low_pc_attr
&& has_high_pc_attr
)
18510 /* When using the GNU linker, .gnu.linkonce. sections are used to
18511 eliminate duplicate copies of functions and vtables and such.
18512 The linker will arbitrarily choose one and discard the others.
18513 The AT_*_pc values for such functions refer to local labels in
18514 these sections. If the section from that file was discarded, the
18515 labels are not in the output, so the relocs get a value of 0.
18516 If this is a discarded function, mark the pc bounds as invalid,
18517 so that GDB will ignore it. */
18518 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18520 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18521 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18523 complaint (&symfile_complaints
,
18524 _("DW_AT_low_pc %s is zero "
18525 "for DIE at %s [in module %s]"),
18526 paddress (gdbarch
, lowpc
),
18527 sect_offset_str (sect_off
),
18528 objfile_name (objfile
));
18530 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18531 else if (lowpc
>= highpc
)
18533 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18534 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18536 complaint (&symfile_complaints
,
18537 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18538 "for DIE at %s [in module %s]"),
18539 paddress (gdbarch
, lowpc
),
18540 paddress (gdbarch
, highpc
),
18541 sect_offset_str (sect_off
),
18542 objfile_name (objfile
));
18551 /* Find a cached partial DIE at OFFSET in CU. */
18553 struct partial_die_info
*
18554 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18556 struct partial_die_info
*lookup_die
= NULL
;
18557 struct partial_die_info
part_die (sect_off
);
18559 lookup_die
= ((struct partial_die_info
*)
18560 htab_find_with_hash (partial_dies
, &part_die
,
18561 to_underlying (sect_off
)));
18566 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18567 except in the case of .debug_types DIEs which do not reference
18568 outside their CU (they do however referencing other types via
18569 DW_FORM_ref_sig8). */
18571 static struct partial_die_info
*
18572 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18574 struct dwarf2_per_objfile
*dwarf2_per_objfile
18575 = cu
->per_cu
->dwarf2_per_objfile
;
18576 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18577 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18578 struct partial_die_info
*pd
= NULL
;
18580 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18581 && offset_in_cu_p (&cu
->header
, sect_off
))
18583 pd
= cu
->find_partial_die (sect_off
);
18586 /* We missed recording what we needed.
18587 Load all dies and try again. */
18588 per_cu
= cu
->per_cu
;
18592 /* TUs don't reference other CUs/TUs (except via type signatures). */
18593 if (cu
->per_cu
->is_debug_types
)
18595 error (_("Dwarf Error: Type Unit at offset %s contains"
18596 " external reference to offset %s [in module %s].\n"),
18597 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18598 bfd_get_filename (objfile
->obfd
));
18600 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18601 dwarf2_per_objfile
);
18603 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18604 load_partial_comp_unit (per_cu
);
18606 per_cu
->cu
->last_used
= 0;
18607 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18610 /* If we didn't find it, and not all dies have been loaded,
18611 load them all and try again. */
18613 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18615 per_cu
->load_all_dies
= 1;
18617 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18618 THIS_CU->cu may already be in use. So we can't just free it and
18619 replace its DIEs with the ones we read in. Instead, we leave those
18620 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18621 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18623 load_partial_comp_unit (per_cu
);
18625 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18629 internal_error (__FILE__
, __LINE__
,
18630 _("could not find partial DIE %s "
18631 "in cache [from module %s]\n"),
18632 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18636 /* See if we can figure out if the class lives in a namespace. We do
18637 this by looking for a member function; its demangled name will
18638 contain namespace info, if there is any. */
18641 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18642 struct dwarf2_cu
*cu
)
18644 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18645 what template types look like, because the demangler
18646 frequently doesn't give the same name as the debug info. We
18647 could fix this by only using the demangled name to get the
18648 prefix (but see comment in read_structure_type). */
18650 struct partial_die_info
*real_pdi
;
18651 struct partial_die_info
*child_pdi
;
18653 /* If this DIE (this DIE's specification, if any) has a parent, then
18654 we should not do this. We'll prepend the parent's fully qualified
18655 name when we create the partial symbol. */
18657 real_pdi
= struct_pdi
;
18658 while (real_pdi
->has_specification
)
18659 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
18660 real_pdi
->spec_is_dwz
, cu
);
18662 if (real_pdi
->die_parent
!= NULL
)
18665 for (child_pdi
= struct_pdi
->die_child
;
18667 child_pdi
= child_pdi
->die_sibling
)
18669 if (child_pdi
->tag
== DW_TAG_subprogram
18670 && child_pdi
->linkage_name
!= NULL
)
18672 char *actual_class_name
18673 = language_class_name_from_physname (cu
->language_defn
,
18674 child_pdi
->linkage_name
);
18675 if (actual_class_name
!= NULL
)
18677 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18680 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
18682 strlen (actual_class_name
)));
18683 xfree (actual_class_name
);
18691 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18693 /* Once we've fixed up a die, there's no point in doing so again.
18694 This also avoids a memory leak if we were to call
18695 guess_partial_die_structure_name multiple times. */
18699 /* If we found a reference attribute and the DIE has no name, try
18700 to find a name in the referred to DIE. */
18702 if (name
== NULL
&& has_specification
)
18704 struct partial_die_info
*spec_die
;
18706 spec_die
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18708 spec_die
->fixup (cu
);
18710 if (spec_die
->name
)
18712 name
= spec_die
->name
;
18714 /* Copy DW_AT_external attribute if it is set. */
18715 if (spec_die
->is_external
)
18716 is_external
= spec_die
->is_external
;
18720 /* Set default names for some unnamed DIEs. */
18722 if (name
== NULL
&& tag
== DW_TAG_namespace
)
18723 name
= CP_ANONYMOUS_NAMESPACE_STR
;
18725 /* If there is no parent die to provide a namespace, and there are
18726 children, see if we can determine the namespace from their linkage
18728 if (cu
->language
== language_cplus
18729 && !VEC_empty (dwarf2_section_info_def
,
18730 cu
->per_cu
->dwarf2_per_objfile
->types
)
18731 && die_parent
== NULL
18733 && (tag
== DW_TAG_class_type
18734 || tag
== DW_TAG_structure_type
18735 || tag
== DW_TAG_union_type
))
18736 guess_partial_die_structure_name (this, cu
);
18738 /* GCC might emit a nameless struct or union that has a linkage
18739 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18741 && (tag
== DW_TAG_class_type
18742 || tag
== DW_TAG_interface_type
18743 || tag
== DW_TAG_structure_type
18744 || tag
== DW_TAG_union_type
)
18745 && linkage_name
!= NULL
)
18749 demangled
= gdb_demangle (linkage_name
, DMGL_TYPES
);
18754 /* Strip any leading namespaces/classes, keep only the base name.
18755 DW_AT_name for named DIEs does not contain the prefixes. */
18756 base
= strrchr (demangled
, ':');
18757 if (base
&& base
> demangled
&& base
[-1] == ':')
18762 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18765 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
18766 base
, strlen (base
)));
18774 /* Read an attribute value described by an attribute form. */
18776 static const gdb_byte
*
18777 read_attribute_value (const struct die_reader_specs
*reader
,
18778 struct attribute
*attr
, unsigned form
,
18779 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
18781 struct dwarf2_cu
*cu
= reader
->cu
;
18782 struct dwarf2_per_objfile
*dwarf2_per_objfile
18783 = cu
->per_cu
->dwarf2_per_objfile
;
18784 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18785 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18786 bfd
*abfd
= reader
->abfd
;
18787 struct comp_unit_head
*cu_header
= &cu
->header
;
18788 unsigned int bytes_read
;
18789 struct dwarf_block
*blk
;
18791 attr
->form
= (enum dwarf_form
) form
;
18794 case DW_FORM_ref_addr
:
18795 if (cu
->header
.version
== 2)
18796 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18798 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
18799 &cu
->header
, &bytes_read
);
18800 info_ptr
+= bytes_read
;
18802 case DW_FORM_GNU_ref_alt
:
18803 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18804 info_ptr
+= bytes_read
;
18807 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18808 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
18809 info_ptr
+= bytes_read
;
18811 case DW_FORM_block2
:
18812 blk
= dwarf_alloc_block (cu
);
18813 blk
->size
= read_2_bytes (abfd
, info_ptr
);
18815 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18816 info_ptr
+= blk
->size
;
18817 DW_BLOCK (attr
) = blk
;
18819 case DW_FORM_block4
:
18820 blk
= dwarf_alloc_block (cu
);
18821 blk
->size
= read_4_bytes (abfd
, info_ptr
);
18823 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18824 info_ptr
+= blk
->size
;
18825 DW_BLOCK (attr
) = blk
;
18827 case DW_FORM_data2
:
18828 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
18831 case DW_FORM_data4
:
18832 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
18835 case DW_FORM_data8
:
18836 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
18839 case DW_FORM_data16
:
18840 blk
= dwarf_alloc_block (cu
);
18842 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
18844 DW_BLOCK (attr
) = blk
;
18846 case DW_FORM_sec_offset
:
18847 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18848 info_ptr
+= bytes_read
;
18850 case DW_FORM_string
:
18851 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
18852 DW_STRING_IS_CANONICAL (attr
) = 0;
18853 info_ptr
+= bytes_read
;
18856 if (!cu
->per_cu
->is_dwz
)
18858 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
18859 abfd
, info_ptr
, cu_header
,
18861 DW_STRING_IS_CANONICAL (attr
) = 0;
18862 info_ptr
+= bytes_read
;
18866 case DW_FORM_line_strp
:
18867 if (!cu
->per_cu
->is_dwz
)
18869 DW_STRING (attr
) = read_indirect_line_string (dwarf2_per_objfile
,
18871 cu_header
, &bytes_read
);
18872 DW_STRING_IS_CANONICAL (attr
) = 0;
18873 info_ptr
+= bytes_read
;
18877 case DW_FORM_GNU_strp_alt
:
18879 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
18880 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
18883 DW_STRING (attr
) = read_indirect_string_from_dwz (objfile
,
18885 DW_STRING_IS_CANONICAL (attr
) = 0;
18886 info_ptr
+= bytes_read
;
18889 case DW_FORM_exprloc
:
18890 case DW_FORM_block
:
18891 blk
= dwarf_alloc_block (cu
);
18892 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18893 info_ptr
+= bytes_read
;
18894 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18895 info_ptr
+= blk
->size
;
18896 DW_BLOCK (attr
) = blk
;
18898 case DW_FORM_block1
:
18899 blk
= dwarf_alloc_block (cu
);
18900 blk
->size
= read_1_byte (abfd
, info_ptr
);
18902 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18903 info_ptr
+= blk
->size
;
18904 DW_BLOCK (attr
) = blk
;
18906 case DW_FORM_data1
:
18907 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
18911 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
18914 case DW_FORM_flag_present
:
18915 DW_UNSND (attr
) = 1;
18917 case DW_FORM_sdata
:
18918 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
18919 info_ptr
+= bytes_read
;
18921 case DW_FORM_udata
:
18922 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18923 info_ptr
+= bytes_read
;
18926 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18927 + read_1_byte (abfd
, info_ptr
));
18931 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18932 + read_2_bytes (abfd
, info_ptr
));
18936 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18937 + read_4_bytes (abfd
, info_ptr
));
18941 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18942 + read_8_bytes (abfd
, info_ptr
));
18945 case DW_FORM_ref_sig8
:
18946 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
18949 case DW_FORM_ref_udata
:
18950 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
18951 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
18952 info_ptr
+= bytes_read
;
18954 case DW_FORM_indirect
:
18955 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18956 info_ptr
+= bytes_read
;
18957 if (form
== DW_FORM_implicit_const
)
18959 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
18960 info_ptr
+= bytes_read
;
18962 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
18965 case DW_FORM_implicit_const
:
18966 DW_SND (attr
) = implicit_const
;
18968 case DW_FORM_GNU_addr_index
:
18969 if (reader
->dwo_file
== NULL
)
18971 /* For now flag a hard error.
18972 Later we can turn this into a complaint. */
18973 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
18974 dwarf_form_name (form
),
18975 bfd_get_filename (abfd
));
18977 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
18978 info_ptr
+= bytes_read
;
18980 case DW_FORM_GNU_str_index
:
18981 if (reader
->dwo_file
== NULL
)
18983 /* For now flag a hard error.
18984 Later we can turn this into a complaint if warranted. */
18985 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
18986 dwarf_form_name (form
),
18987 bfd_get_filename (abfd
));
18990 ULONGEST str_index
=
18991 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18993 DW_STRING (attr
) = read_str_index (reader
, str_index
);
18994 DW_STRING_IS_CANONICAL (attr
) = 0;
18995 info_ptr
+= bytes_read
;
18999 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19000 dwarf_form_name (form
),
19001 bfd_get_filename (abfd
));
19005 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
19006 attr
->form
= DW_FORM_GNU_ref_alt
;
19008 /* We have seen instances where the compiler tried to emit a byte
19009 size attribute of -1 which ended up being encoded as an unsigned
19010 0xffffffff. Although 0xffffffff is technically a valid size value,
19011 an object of this size seems pretty unlikely so we can relatively
19012 safely treat these cases as if the size attribute was invalid and
19013 treat them as zero by default. */
19014 if (attr
->name
== DW_AT_byte_size
19015 && form
== DW_FORM_data4
19016 && DW_UNSND (attr
) >= 0xffffffff)
19019 (&symfile_complaints
,
19020 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19021 hex_string (DW_UNSND (attr
)));
19022 DW_UNSND (attr
) = 0;
19028 /* Read an attribute described by an abbreviated attribute. */
19030 static const gdb_byte
*
19031 read_attribute (const struct die_reader_specs
*reader
,
19032 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19033 const gdb_byte
*info_ptr
)
19035 attr
->name
= abbrev
->name
;
19036 return read_attribute_value (reader
, attr
, abbrev
->form
,
19037 abbrev
->implicit_const
, info_ptr
);
19040 /* Read dwarf information from a buffer. */
19042 static unsigned int
19043 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
19045 return bfd_get_8 (abfd
, buf
);
19049 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
19051 return bfd_get_signed_8 (abfd
, buf
);
19054 static unsigned int
19055 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19057 return bfd_get_16 (abfd
, buf
);
19061 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19063 return bfd_get_signed_16 (abfd
, buf
);
19066 static unsigned int
19067 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19069 return bfd_get_32 (abfd
, buf
);
19073 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19075 return bfd_get_signed_32 (abfd
, buf
);
19079 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19081 return bfd_get_64 (abfd
, buf
);
19085 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
19086 unsigned int *bytes_read
)
19088 struct comp_unit_head
*cu_header
= &cu
->header
;
19089 CORE_ADDR retval
= 0;
19091 if (cu_header
->signed_addr_p
)
19093 switch (cu_header
->addr_size
)
19096 retval
= bfd_get_signed_16 (abfd
, buf
);
19099 retval
= bfd_get_signed_32 (abfd
, buf
);
19102 retval
= bfd_get_signed_64 (abfd
, buf
);
19105 internal_error (__FILE__
, __LINE__
,
19106 _("read_address: bad switch, signed [in module %s]"),
19107 bfd_get_filename (abfd
));
19112 switch (cu_header
->addr_size
)
19115 retval
= bfd_get_16 (abfd
, buf
);
19118 retval
= bfd_get_32 (abfd
, buf
);
19121 retval
= bfd_get_64 (abfd
, buf
);
19124 internal_error (__FILE__
, __LINE__
,
19125 _("read_address: bad switch, "
19126 "unsigned [in module %s]"),
19127 bfd_get_filename (abfd
));
19131 *bytes_read
= cu_header
->addr_size
;
19135 /* Read the initial length from a section. The (draft) DWARF 3
19136 specification allows the initial length to take up either 4 bytes
19137 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
19138 bytes describe the length and all offsets will be 8 bytes in length
19141 An older, non-standard 64-bit format is also handled by this
19142 function. The older format in question stores the initial length
19143 as an 8-byte quantity without an escape value. Lengths greater
19144 than 2^32 aren't very common which means that the initial 4 bytes
19145 is almost always zero. Since a length value of zero doesn't make
19146 sense for the 32-bit format, this initial zero can be considered to
19147 be an escape value which indicates the presence of the older 64-bit
19148 format. As written, the code can't detect (old format) lengths
19149 greater than 4GB. If it becomes necessary to handle lengths
19150 somewhat larger than 4GB, we could allow other small values (such
19151 as the non-sensical values of 1, 2, and 3) to also be used as
19152 escape values indicating the presence of the old format.
19154 The value returned via bytes_read should be used to increment the
19155 relevant pointer after calling read_initial_length().
19157 [ Note: read_initial_length() and read_offset() are based on the
19158 document entitled "DWARF Debugging Information Format", revision
19159 3, draft 8, dated November 19, 2001. This document was obtained
19162 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
19164 This document is only a draft and is subject to change. (So beware.)
19166 Details regarding the older, non-standard 64-bit format were
19167 determined empirically by examining 64-bit ELF files produced by
19168 the SGI toolchain on an IRIX 6.5 machine.
19170 - Kevin, July 16, 2002
19174 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
19176 LONGEST length
= bfd_get_32 (abfd
, buf
);
19178 if (length
== 0xffffffff)
19180 length
= bfd_get_64 (abfd
, buf
+ 4);
19183 else if (length
== 0)
19185 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
19186 length
= bfd_get_64 (abfd
, buf
);
19197 /* Cover function for read_initial_length.
19198 Returns the length of the object at BUF, and stores the size of the
19199 initial length in *BYTES_READ and stores the size that offsets will be in
19201 If the initial length size is not equivalent to that specified in
19202 CU_HEADER then issue a complaint.
19203 This is useful when reading non-comp-unit headers. */
19206 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
19207 const struct comp_unit_head
*cu_header
,
19208 unsigned int *bytes_read
,
19209 unsigned int *offset_size
)
19211 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
19213 gdb_assert (cu_header
->initial_length_size
== 4
19214 || cu_header
->initial_length_size
== 8
19215 || cu_header
->initial_length_size
== 12);
19217 if (cu_header
->initial_length_size
!= *bytes_read
)
19218 complaint (&symfile_complaints
,
19219 _("intermixed 32-bit and 64-bit DWARF sections"));
19221 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
19225 /* Read an offset from the data stream. The size of the offset is
19226 given by cu_header->offset_size. */
19229 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
19230 const struct comp_unit_head
*cu_header
,
19231 unsigned int *bytes_read
)
19233 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
19235 *bytes_read
= cu_header
->offset_size
;
19239 /* Read an offset from the data stream. */
19242 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
19244 LONGEST retval
= 0;
19246 switch (offset_size
)
19249 retval
= bfd_get_32 (abfd
, buf
);
19252 retval
= bfd_get_64 (abfd
, buf
);
19255 internal_error (__FILE__
, __LINE__
,
19256 _("read_offset_1: bad switch [in module %s]"),
19257 bfd_get_filename (abfd
));
19263 static const gdb_byte
*
19264 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
19266 /* If the size of a host char is 8 bits, we can return a pointer
19267 to the buffer, otherwise we have to copy the data to a buffer
19268 allocated on the temporary obstack. */
19269 gdb_assert (HOST_CHAR_BIT
== 8);
19273 static const char *
19274 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
19275 unsigned int *bytes_read_ptr
)
19277 /* If the size of a host char is 8 bits, we can return a pointer
19278 to the string, otherwise we have to copy the string to a buffer
19279 allocated on the temporary obstack. */
19280 gdb_assert (HOST_CHAR_BIT
== 8);
19283 *bytes_read_ptr
= 1;
19286 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
19287 return (const char *) buf
;
19290 /* Return pointer to string at section SECT offset STR_OFFSET with error
19291 reporting strings FORM_NAME and SECT_NAME. */
19293 static const char *
19294 read_indirect_string_at_offset_from (struct objfile
*objfile
,
19295 bfd
*abfd
, LONGEST str_offset
,
19296 struct dwarf2_section_info
*sect
,
19297 const char *form_name
,
19298 const char *sect_name
)
19300 dwarf2_read_section (objfile
, sect
);
19301 if (sect
->buffer
== NULL
)
19302 error (_("%s used without %s section [in module %s]"),
19303 form_name
, sect_name
, bfd_get_filename (abfd
));
19304 if (str_offset
>= sect
->size
)
19305 error (_("%s pointing outside of %s section [in module %s]"),
19306 form_name
, sect_name
, bfd_get_filename (abfd
));
19307 gdb_assert (HOST_CHAR_BIT
== 8);
19308 if (sect
->buffer
[str_offset
] == '\0')
19310 return (const char *) (sect
->buffer
+ str_offset
);
19313 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19315 static const char *
19316 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19317 bfd
*abfd
, LONGEST str_offset
)
19319 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19321 &dwarf2_per_objfile
->str
,
19322 "DW_FORM_strp", ".debug_str");
19325 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
19327 static const char *
19328 read_indirect_line_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19329 bfd
*abfd
, LONGEST str_offset
)
19331 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19333 &dwarf2_per_objfile
->line_str
,
19334 "DW_FORM_line_strp",
19335 ".debug_line_str");
19338 /* Read a string at offset STR_OFFSET in the .debug_str section from
19339 the .dwz file DWZ. Throw an error if the offset is too large. If
19340 the string consists of a single NUL byte, return NULL; otherwise
19341 return a pointer to the string. */
19343 static const char *
19344 read_indirect_string_from_dwz (struct objfile
*objfile
, struct dwz_file
*dwz
,
19345 LONGEST str_offset
)
19347 dwarf2_read_section (objfile
, &dwz
->str
);
19349 if (dwz
->str
.buffer
== NULL
)
19350 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
19351 "section [in module %s]"),
19352 bfd_get_filename (dwz
->dwz_bfd
));
19353 if (str_offset
>= dwz
->str
.size
)
19354 error (_("DW_FORM_GNU_strp_alt pointing outside of "
19355 ".debug_str section [in module %s]"),
19356 bfd_get_filename (dwz
->dwz_bfd
));
19357 gdb_assert (HOST_CHAR_BIT
== 8);
19358 if (dwz
->str
.buffer
[str_offset
] == '\0')
19360 return (const char *) (dwz
->str
.buffer
+ str_offset
);
19363 /* Return pointer to string at .debug_str offset as read from BUF.
19364 BUF is assumed to be in a compilation unit described by CU_HEADER.
19365 Return *BYTES_READ_PTR count of bytes read from BUF. */
19367 static const char *
19368 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19369 const gdb_byte
*buf
,
19370 const struct comp_unit_head
*cu_header
,
19371 unsigned int *bytes_read_ptr
)
19373 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19375 return read_indirect_string_at_offset (dwarf2_per_objfile
, abfd
, str_offset
);
19378 /* Return pointer to string at .debug_line_str offset as read from BUF.
19379 BUF is assumed to be in a compilation unit described by CU_HEADER.
19380 Return *BYTES_READ_PTR count of bytes read from BUF. */
19382 static const char *
19383 read_indirect_line_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19384 bfd
*abfd
, const gdb_byte
*buf
,
19385 const struct comp_unit_head
*cu_header
,
19386 unsigned int *bytes_read_ptr
)
19388 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19390 return read_indirect_line_string_at_offset (dwarf2_per_objfile
, abfd
,
19395 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19396 unsigned int *bytes_read_ptr
)
19399 unsigned int num_read
;
19401 unsigned char byte
;
19408 byte
= bfd_get_8 (abfd
, buf
);
19411 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19412 if ((byte
& 128) == 0)
19418 *bytes_read_ptr
= num_read
;
19423 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19424 unsigned int *bytes_read_ptr
)
19427 int shift
, num_read
;
19428 unsigned char byte
;
19435 byte
= bfd_get_8 (abfd
, buf
);
19438 result
|= ((LONGEST
) (byte
& 127) << shift
);
19440 if ((byte
& 128) == 0)
19445 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
19446 result
|= -(((LONGEST
) 1) << shift
);
19447 *bytes_read_ptr
= num_read
;
19451 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19452 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
19453 ADDR_SIZE is the size of addresses from the CU header. */
19456 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19457 unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
19459 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19460 bfd
*abfd
= objfile
->obfd
;
19461 const gdb_byte
*info_ptr
;
19463 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
19464 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19465 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19466 objfile_name (objfile
));
19467 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
19468 error (_("DW_FORM_addr_index pointing outside of "
19469 ".debug_addr section [in module %s]"),
19470 objfile_name (objfile
));
19471 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19472 + addr_base
+ addr_index
* addr_size
);
19473 if (addr_size
== 4)
19474 return bfd_get_32 (abfd
, info_ptr
);
19476 return bfd_get_64 (abfd
, info_ptr
);
19479 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19482 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19484 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19485 cu
->addr_base
, cu
->header
.addr_size
);
19488 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19491 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19492 unsigned int *bytes_read
)
19494 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19495 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19497 return read_addr_index (cu
, addr_index
);
19500 /* Data structure to pass results from dwarf2_read_addr_index_reader
19501 back to dwarf2_read_addr_index. */
19503 struct dwarf2_read_addr_index_data
19505 ULONGEST addr_base
;
19509 /* die_reader_func for dwarf2_read_addr_index. */
19512 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
19513 const gdb_byte
*info_ptr
,
19514 struct die_info
*comp_unit_die
,
19518 struct dwarf2_cu
*cu
= reader
->cu
;
19519 struct dwarf2_read_addr_index_data
*aidata
=
19520 (struct dwarf2_read_addr_index_data
*) data
;
19522 aidata
->addr_base
= cu
->addr_base
;
19523 aidata
->addr_size
= cu
->header
.addr_size
;
19526 /* Given an index in .debug_addr, fetch the value.
19527 NOTE: This can be called during dwarf expression evaluation,
19528 long after the debug information has been read, and thus per_cu->cu
19529 may no longer exist. */
19532 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
19533 unsigned int addr_index
)
19535 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19536 struct dwarf2_cu
*cu
= per_cu
->cu
;
19537 ULONGEST addr_base
;
19540 /* We need addr_base and addr_size.
19541 If we don't have PER_CU->cu, we have to get it.
19542 Nasty, but the alternative is storing the needed info in PER_CU,
19543 which at this point doesn't seem justified: it's not clear how frequently
19544 it would get used and it would increase the size of every PER_CU.
19545 Entry points like dwarf2_per_cu_addr_size do a similar thing
19546 so we're not in uncharted territory here.
19547 Alas we need to be a bit more complicated as addr_base is contained
19550 We don't need to read the entire CU(/TU).
19551 We just need the header and top level die.
19553 IWBN to use the aging mechanism to let us lazily later discard the CU.
19554 For now we skip this optimization. */
19558 addr_base
= cu
->addr_base
;
19559 addr_size
= cu
->header
.addr_size
;
19563 struct dwarf2_read_addr_index_data aidata
;
19565 /* Note: We can't use init_cutu_and_read_dies_simple here,
19566 we need addr_base. */
19567 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
19568 dwarf2_read_addr_index_reader
, &aidata
);
19569 addr_base
= aidata
.addr_base
;
19570 addr_size
= aidata
.addr_size
;
19573 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19577 /* Given a DW_FORM_GNU_str_index, fetch the string.
19578 This is only used by the Fission support. */
19580 static const char *
19581 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19583 struct dwarf2_cu
*cu
= reader
->cu
;
19584 struct dwarf2_per_objfile
*dwarf2_per_objfile
19585 = cu
->per_cu
->dwarf2_per_objfile
;
19586 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19587 const char *objf_name
= objfile_name (objfile
);
19588 bfd
*abfd
= objfile
->obfd
;
19589 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
19590 struct dwarf2_section_info
*str_offsets_section
=
19591 &reader
->dwo_file
->sections
.str_offsets
;
19592 const gdb_byte
*info_ptr
;
19593 ULONGEST str_offset
;
19594 static const char form_name
[] = "DW_FORM_GNU_str_index";
19596 dwarf2_read_section (objfile
, str_section
);
19597 dwarf2_read_section (objfile
, str_offsets_section
);
19598 if (str_section
->buffer
== NULL
)
19599 error (_("%s used without .debug_str.dwo section"
19600 " in CU at offset %s [in module %s]"),
19601 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19602 if (str_offsets_section
->buffer
== NULL
)
19603 error (_("%s used without .debug_str_offsets.dwo section"
19604 " in CU at offset %s [in module %s]"),
19605 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19606 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
19607 error (_("%s pointing outside of .debug_str_offsets.dwo"
19608 " section in CU at offset %s [in module %s]"),
19609 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19610 info_ptr
= (str_offsets_section
->buffer
19611 + str_index
* cu
->header
.offset_size
);
19612 if (cu
->header
.offset_size
== 4)
19613 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19615 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19616 if (str_offset
>= str_section
->size
)
19617 error (_("Offset from %s pointing outside of"
19618 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19619 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19620 return (const char *) (str_section
->buffer
+ str_offset
);
19623 /* Return the length of an LEB128 number in BUF. */
19626 leb128_size (const gdb_byte
*buf
)
19628 const gdb_byte
*begin
= buf
;
19634 if ((byte
& 128) == 0)
19635 return buf
- begin
;
19640 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19649 cu
->language
= language_c
;
19652 case DW_LANG_C_plus_plus
:
19653 case DW_LANG_C_plus_plus_11
:
19654 case DW_LANG_C_plus_plus_14
:
19655 cu
->language
= language_cplus
;
19658 cu
->language
= language_d
;
19660 case DW_LANG_Fortran77
:
19661 case DW_LANG_Fortran90
:
19662 case DW_LANG_Fortran95
:
19663 case DW_LANG_Fortran03
:
19664 case DW_LANG_Fortran08
:
19665 cu
->language
= language_fortran
;
19668 cu
->language
= language_go
;
19670 case DW_LANG_Mips_Assembler
:
19671 cu
->language
= language_asm
;
19673 case DW_LANG_Ada83
:
19674 case DW_LANG_Ada95
:
19675 cu
->language
= language_ada
;
19677 case DW_LANG_Modula2
:
19678 cu
->language
= language_m2
;
19680 case DW_LANG_Pascal83
:
19681 cu
->language
= language_pascal
;
19684 cu
->language
= language_objc
;
19687 case DW_LANG_Rust_old
:
19688 cu
->language
= language_rust
;
19690 case DW_LANG_Cobol74
:
19691 case DW_LANG_Cobol85
:
19693 cu
->language
= language_minimal
;
19696 cu
->language_defn
= language_def (cu
->language
);
19699 /* Return the named attribute or NULL if not there. */
19701 static struct attribute
*
19702 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19707 struct attribute
*spec
= NULL
;
19709 for (i
= 0; i
< die
->num_attrs
; ++i
)
19711 if (die
->attrs
[i
].name
== name
)
19712 return &die
->attrs
[i
];
19713 if (die
->attrs
[i
].name
== DW_AT_specification
19714 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19715 spec
= &die
->attrs
[i
];
19721 die
= follow_die_ref (die
, spec
, &cu
);
19727 /* Return the named attribute or NULL if not there,
19728 but do not follow DW_AT_specification, etc.
19729 This is for use in contexts where we're reading .debug_types dies.
19730 Following DW_AT_specification, DW_AT_abstract_origin will take us
19731 back up the chain, and we want to go down. */
19733 static struct attribute
*
19734 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
19738 for (i
= 0; i
< die
->num_attrs
; ++i
)
19739 if (die
->attrs
[i
].name
== name
)
19740 return &die
->attrs
[i
];
19745 /* Return the string associated with a string-typed attribute, or NULL if it
19746 is either not found or is of an incorrect type. */
19748 static const char *
19749 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19751 struct attribute
*attr
;
19752 const char *str
= NULL
;
19754 attr
= dwarf2_attr (die
, name
, cu
);
19758 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
19759 || attr
->form
== DW_FORM_string
19760 || attr
->form
== DW_FORM_GNU_str_index
19761 || attr
->form
== DW_FORM_GNU_strp_alt
)
19762 str
= DW_STRING (attr
);
19764 complaint (&symfile_complaints
,
19765 _("string type expected for attribute %s for "
19766 "DIE at %s in module %s"),
19767 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
19768 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
19774 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19775 and holds a non-zero value. This function should only be used for
19776 DW_FORM_flag or DW_FORM_flag_present attributes. */
19779 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19781 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19783 return (attr
&& DW_UNSND (attr
));
19787 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19789 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19790 which value is non-zero. However, we have to be careful with
19791 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19792 (via dwarf2_flag_true_p) follows this attribute. So we may
19793 end up accidently finding a declaration attribute that belongs
19794 to a different DIE referenced by the specification attribute,
19795 even though the given DIE does not have a declaration attribute. */
19796 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19797 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19800 /* Return the die giving the specification for DIE, if there is
19801 one. *SPEC_CU is the CU containing DIE on input, and the CU
19802 containing the return value on output. If there is no
19803 specification, but there is an abstract origin, that is
19806 static struct die_info
*
19807 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19809 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19812 if (spec_attr
== NULL
)
19813 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19815 if (spec_attr
== NULL
)
19818 return follow_die_ref (die
, spec_attr
, spec_cu
);
19821 /* Stub for free_line_header to match void * callback types. */
19824 free_line_header_voidp (void *arg
)
19826 struct line_header
*lh
= (struct line_header
*) arg
;
19832 line_header::add_include_dir (const char *include_dir
)
19834 if (dwarf_line_debug
>= 2)
19835 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
19836 include_dirs
.size () + 1, include_dir
);
19838 include_dirs
.push_back (include_dir
);
19842 line_header::add_file_name (const char *name
,
19844 unsigned int mod_time
,
19845 unsigned int length
)
19847 if (dwarf_line_debug
>= 2)
19848 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
19849 (unsigned) file_names
.size () + 1, name
);
19851 file_names
.emplace_back (name
, d_index
, mod_time
, length
);
19854 /* A convenience function to find the proper .debug_line section for a CU. */
19856 static struct dwarf2_section_info
*
19857 get_debug_line_section (struct dwarf2_cu
*cu
)
19859 struct dwarf2_section_info
*section
;
19860 struct dwarf2_per_objfile
*dwarf2_per_objfile
19861 = cu
->per_cu
->dwarf2_per_objfile
;
19863 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
19865 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19866 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
19867 else if (cu
->per_cu
->is_dwz
)
19869 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19871 section
= &dwz
->line
;
19874 section
= &dwarf2_per_objfile
->line
;
19879 /* Read directory or file name entry format, starting with byte of
19880 format count entries, ULEB128 pairs of entry formats, ULEB128 of
19881 entries count and the entries themselves in the described entry
19885 read_formatted_entries (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19886 bfd
*abfd
, const gdb_byte
**bufp
,
19887 struct line_header
*lh
,
19888 const struct comp_unit_head
*cu_header
,
19889 void (*callback
) (struct line_header
*lh
,
19892 unsigned int mod_time
,
19893 unsigned int length
))
19895 gdb_byte format_count
, formati
;
19896 ULONGEST data_count
, datai
;
19897 const gdb_byte
*buf
= *bufp
;
19898 const gdb_byte
*format_header_data
;
19899 unsigned int bytes_read
;
19901 format_count
= read_1_byte (abfd
, buf
);
19903 format_header_data
= buf
;
19904 for (formati
= 0; formati
< format_count
; formati
++)
19906 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
19908 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
19912 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
19914 for (datai
= 0; datai
< data_count
; datai
++)
19916 const gdb_byte
*format
= format_header_data
;
19917 struct file_entry fe
;
19919 for (formati
= 0; formati
< format_count
; formati
++)
19921 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
19922 format
+= bytes_read
;
19924 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
19925 format
+= bytes_read
;
19927 gdb::optional
<const char *> string
;
19928 gdb::optional
<unsigned int> uint
;
19932 case DW_FORM_string
:
19933 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
19937 case DW_FORM_line_strp
:
19938 string
.emplace (read_indirect_line_string (dwarf2_per_objfile
,
19945 case DW_FORM_data1
:
19946 uint
.emplace (read_1_byte (abfd
, buf
));
19950 case DW_FORM_data2
:
19951 uint
.emplace (read_2_bytes (abfd
, buf
));
19955 case DW_FORM_data4
:
19956 uint
.emplace (read_4_bytes (abfd
, buf
));
19960 case DW_FORM_data8
:
19961 uint
.emplace (read_8_bytes (abfd
, buf
));
19965 case DW_FORM_udata
:
19966 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
19970 case DW_FORM_block
:
19971 /* It is valid only for DW_LNCT_timestamp which is ignored by
19976 switch (content_type
)
19979 if (string
.has_value ())
19982 case DW_LNCT_directory_index
:
19983 if (uint
.has_value ())
19984 fe
.d_index
= (dir_index
) *uint
;
19986 case DW_LNCT_timestamp
:
19987 if (uint
.has_value ())
19988 fe
.mod_time
= *uint
;
19991 if (uint
.has_value ())
19997 complaint (&symfile_complaints
,
19998 _("Unknown format content type %s"),
19999 pulongest (content_type
));
20003 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
20009 /* Read the statement program header starting at OFFSET in
20010 .debug_line, or .debug_line.dwo. Return a pointer
20011 to a struct line_header, allocated using xmalloc.
20012 Returns NULL if there is a problem reading the header, e.g., if it
20013 has a version we don't understand.
20015 NOTE: the strings in the include directory and file name tables of
20016 the returned object point into the dwarf line section buffer,
20017 and must not be freed. */
20019 static line_header_up
20020 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
20022 const gdb_byte
*line_ptr
;
20023 unsigned int bytes_read
, offset_size
;
20025 const char *cur_dir
, *cur_file
;
20026 struct dwarf2_section_info
*section
;
20028 struct dwarf2_per_objfile
*dwarf2_per_objfile
20029 = cu
->per_cu
->dwarf2_per_objfile
;
20031 section
= get_debug_line_section (cu
);
20032 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
20033 if (section
->buffer
== NULL
)
20035 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20036 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
20038 complaint (&symfile_complaints
, _("missing .debug_line section"));
20042 /* We can't do this until we know the section is non-empty.
20043 Only then do we know we have such a section. */
20044 abfd
= get_section_bfd_owner (section
);
20046 /* Make sure that at least there's room for the total_length field.
20047 That could be 12 bytes long, but we're just going to fudge that. */
20048 if (to_underlying (sect_off
) + 4 >= section
->size
)
20050 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20054 line_header_up
lh (new line_header ());
20056 lh
->sect_off
= sect_off
;
20057 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
20059 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
20061 /* Read in the header. */
20063 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
20064 &bytes_read
, &offset_size
);
20065 line_ptr
+= bytes_read
;
20066 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
20068 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20071 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
20072 lh
->version
= read_2_bytes (abfd
, line_ptr
);
20074 if (lh
->version
> 5)
20076 /* This is a version we don't understand. The format could have
20077 changed in ways we don't handle properly so just punt. */
20078 complaint (&symfile_complaints
,
20079 _("unsupported version in .debug_line section"));
20082 if (lh
->version
>= 5)
20084 gdb_byte segment_selector_size
;
20086 /* Skip address size. */
20087 read_1_byte (abfd
, line_ptr
);
20090 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
20092 if (segment_selector_size
!= 0)
20094 complaint (&symfile_complaints
,
20095 _("unsupported segment selector size %u "
20096 "in .debug_line section"),
20097 segment_selector_size
);
20101 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
20102 line_ptr
+= offset_size
;
20103 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
20105 if (lh
->version
>= 4)
20107 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
20111 lh
->maximum_ops_per_instruction
= 1;
20113 if (lh
->maximum_ops_per_instruction
== 0)
20115 lh
->maximum_ops_per_instruction
= 1;
20116 complaint (&symfile_complaints
,
20117 _("invalid maximum_ops_per_instruction "
20118 "in `.debug_line' section"));
20121 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
20123 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
20125 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
20127 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
20129 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
20131 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
20132 for (i
= 1; i
< lh
->opcode_base
; ++i
)
20134 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
20138 if (lh
->version
>= 5)
20140 /* Read directory table. */
20141 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20143 [] (struct line_header
*lh
, const char *name
,
20144 dir_index d_index
, unsigned int mod_time
,
20145 unsigned int length
)
20147 lh
->add_include_dir (name
);
20150 /* Read file name table. */
20151 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20153 [] (struct line_header
*lh
, const char *name
,
20154 dir_index d_index
, unsigned int mod_time
,
20155 unsigned int length
)
20157 lh
->add_file_name (name
, d_index
, mod_time
, length
);
20162 /* Read directory table. */
20163 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20165 line_ptr
+= bytes_read
;
20166 lh
->add_include_dir (cur_dir
);
20168 line_ptr
+= bytes_read
;
20170 /* Read file name table. */
20171 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20173 unsigned int mod_time
, length
;
20176 line_ptr
+= bytes_read
;
20177 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20178 line_ptr
+= bytes_read
;
20179 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20180 line_ptr
+= bytes_read
;
20181 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20182 line_ptr
+= bytes_read
;
20184 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
20186 line_ptr
+= bytes_read
;
20188 lh
->statement_program_start
= line_ptr
;
20190 if (line_ptr
> (section
->buffer
+ section
->size
))
20191 complaint (&symfile_complaints
,
20192 _("line number info header doesn't "
20193 "fit in `.debug_line' section"));
20198 /* Subroutine of dwarf_decode_lines to simplify it.
20199 Return the file name of the psymtab for included file FILE_INDEX
20200 in line header LH of PST.
20201 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20202 If space for the result is malloc'd, *NAME_HOLDER will be set.
20203 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
20205 static const char *
20206 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
20207 const struct partial_symtab
*pst
,
20208 const char *comp_dir
,
20209 gdb::unique_xmalloc_ptr
<char> *name_holder
)
20211 const file_entry
&fe
= lh
->file_names
[file_index
];
20212 const char *include_name
= fe
.name
;
20213 const char *include_name_to_compare
= include_name
;
20214 const char *pst_filename
;
20217 const char *dir_name
= fe
.include_dir (lh
);
20219 gdb::unique_xmalloc_ptr
<char> hold_compare
;
20220 if (!IS_ABSOLUTE_PATH (include_name
)
20221 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
20223 /* Avoid creating a duplicate psymtab for PST.
20224 We do this by comparing INCLUDE_NAME and PST_FILENAME.
20225 Before we do the comparison, however, we need to account
20226 for DIR_NAME and COMP_DIR.
20227 First prepend dir_name (if non-NULL). If we still don't
20228 have an absolute path prepend comp_dir (if non-NULL).
20229 However, the directory we record in the include-file's
20230 psymtab does not contain COMP_DIR (to match the
20231 corresponding symtab(s)).
20236 bash$ gcc -g ./hello.c
20237 include_name = "hello.c"
20239 DW_AT_comp_dir = comp_dir = "/tmp"
20240 DW_AT_name = "./hello.c"
20244 if (dir_name
!= NULL
)
20246 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
20247 include_name
, (char *) NULL
));
20248 include_name
= name_holder
->get ();
20249 include_name_to_compare
= include_name
;
20251 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
20253 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
20254 include_name
, (char *) NULL
));
20255 include_name_to_compare
= hold_compare
.get ();
20259 pst_filename
= pst
->filename
;
20260 gdb::unique_xmalloc_ptr
<char> copied_name
;
20261 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
20263 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
20264 pst_filename
, (char *) NULL
));
20265 pst_filename
= copied_name
.get ();
20268 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
20272 return include_name
;
20275 /* State machine to track the state of the line number program. */
20277 class lnp_state_machine
20280 /* Initialize a machine state for the start of a line number
20282 lnp_state_machine (gdbarch
*arch
, line_header
*lh
, bool record_lines_p
);
20284 file_entry
*current_file ()
20286 /* lh->file_names is 0-based, but the file name numbers in the
20287 statement program are 1-based. */
20288 return m_line_header
->file_name_at (m_file
);
20291 /* Record the line in the state machine. END_SEQUENCE is true if
20292 we're processing the end of a sequence. */
20293 void record_line (bool end_sequence
);
20295 /* Check address and if invalid nop-out the rest of the lines in this
20297 void check_line_address (struct dwarf2_cu
*cu
,
20298 const gdb_byte
*line_ptr
,
20299 CORE_ADDR lowpc
, CORE_ADDR address
);
20301 void handle_set_discriminator (unsigned int discriminator
)
20303 m_discriminator
= discriminator
;
20304 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
20307 /* Handle DW_LNE_set_address. */
20308 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
20311 address
+= baseaddr
;
20312 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
20315 /* Handle DW_LNS_advance_pc. */
20316 void handle_advance_pc (CORE_ADDR adjust
);
20318 /* Handle a special opcode. */
20319 void handle_special_opcode (unsigned char op_code
);
20321 /* Handle DW_LNS_advance_line. */
20322 void handle_advance_line (int line_delta
)
20324 advance_line (line_delta
);
20327 /* Handle DW_LNS_set_file. */
20328 void handle_set_file (file_name_index file
);
20330 /* Handle DW_LNS_negate_stmt. */
20331 void handle_negate_stmt ()
20333 m_is_stmt
= !m_is_stmt
;
20336 /* Handle DW_LNS_const_add_pc. */
20337 void handle_const_add_pc ();
20339 /* Handle DW_LNS_fixed_advance_pc. */
20340 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
20342 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20346 /* Handle DW_LNS_copy. */
20347 void handle_copy ()
20349 record_line (false);
20350 m_discriminator
= 0;
20353 /* Handle DW_LNE_end_sequence. */
20354 void handle_end_sequence ()
20356 m_record_line_callback
= ::record_line
;
20360 /* Advance the line by LINE_DELTA. */
20361 void advance_line (int line_delta
)
20363 m_line
+= line_delta
;
20365 if (line_delta
!= 0)
20366 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20369 gdbarch
*m_gdbarch
;
20371 /* True if we're recording lines.
20372 Otherwise we're building partial symtabs and are just interested in
20373 finding include files mentioned by the line number program. */
20374 bool m_record_lines_p
;
20376 /* The line number header. */
20377 line_header
*m_line_header
;
20379 /* These are part of the standard DWARF line number state machine,
20380 and initialized according to the DWARF spec. */
20382 unsigned char m_op_index
= 0;
20383 /* The line table index (1-based) of the current file. */
20384 file_name_index m_file
= (file_name_index
) 1;
20385 unsigned int m_line
= 1;
20387 /* These are initialized in the constructor. */
20389 CORE_ADDR m_address
;
20391 unsigned int m_discriminator
;
20393 /* Additional bits of state we need to track. */
20395 /* The last file that we called dwarf2_start_subfile for.
20396 This is only used for TLLs. */
20397 unsigned int m_last_file
= 0;
20398 /* The last file a line number was recorded for. */
20399 struct subfile
*m_last_subfile
= NULL
;
20401 /* The function to call to record a line. */
20402 record_line_ftype
*m_record_line_callback
= NULL
;
20404 /* The last line number that was recorded, used to coalesce
20405 consecutive entries for the same line. This can happen, for
20406 example, when discriminators are present. PR 17276. */
20407 unsigned int m_last_line
= 0;
20408 bool m_line_has_non_zero_discriminator
= false;
20412 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
20414 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
20415 / m_line_header
->maximum_ops_per_instruction
)
20416 * m_line_header
->minimum_instruction_length
);
20417 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20418 m_op_index
= ((m_op_index
+ adjust
)
20419 % m_line_header
->maximum_ops_per_instruction
);
20423 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
20425 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
20426 CORE_ADDR addr_adj
= (((m_op_index
20427 + (adj_opcode
/ m_line_header
->line_range
))
20428 / m_line_header
->maximum_ops_per_instruction
)
20429 * m_line_header
->minimum_instruction_length
);
20430 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20431 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
20432 % m_line_header
->maximum_ops_per_instruction
);
20434 int line_delta
= (m_line_header
->line_base
20435 + (adj_opcode
% m_line_header
->line_range
));
20436 advance_line (line_delta
);
20437 record_line (false);
20438 m_discriminator
= 0;
20442 lnp_state_machine::handle_set_file (file_name_index file
)
20446 const file_entry
*fe
= current_file ();
20448 dwarf2_debug_line_missing_file_complaint ();
20449 else if (m_record_lines_p
)
20451 const char *dir
= fe
->include_dir (m_line_header
);
20453 m_last_subfile
= current_subfile
;
20454 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20455 dwarf2_start_subfile (fe
->name
, dir
);
20460 lnp_state_machine::handle_const_add_pc ()
20463 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
20466 = (((m_op_index
+ adjust
)
20467 / m_line_header
->maximum_ops_per_instruction
)
20468 * m_line_header
->minimum_instruction_length
);
20470 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20471 m_op_index
= ((m_op_index
+ adjust
)
20472 % m_line_header
->maximum_ops_per_instruction
);
20475 /* Ignore this record_line request. */
20478 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
20483 /* Return non-zero if we should add LINE to the line number table.
20484 LINE is the line to add, LAST_LINE is the last line that was added,
20485 LAST_SUBFILE is the subfile for LAST_LINE.
20486 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
20487 had a non-zero discriminator.
20489 We have to be careful in the presence of discriminators.
20490 E.g., for this line:
20492 for (i = 0; i < 100000; i++);
20494 clang can emit four line number entries for that one line,
20495 each with a different discriminator.
20496 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20498 However, we want gdb to coalesce all four entries into one.
20499 Otherwise the user could stepi into the middle of the line and
20500 gdb would get confused about whether the pc really was in the
20501 middle of the line.
20503 Things are further complicated by the fact that two consecutive
20504 line number entries for the same line is a heuristic used by gcc
20505 to denote the end of the prologue. So we can't just discard duplicate
20506 entries, we have to be selective about it. The heuristic we use is
20507 that we only collapse consecutive entries for the same line if at least
20508 one of those entries has a non-zero discriminator. PR 17276.
20510 Note: Addresses in the line number state machine can never go backwards
20511 within one sequence, thus this coalescing is ok. */
20514 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
20515 int line_has_non_zero_discriminator
,
20516 struct subfile
*last_subfile
)
20518 if (current_subfile
!= last_subfile
)
20520 if (line
!= last_line
)
20522 /* Same line for the same file that we've seen already.
20523 As a last check, for pr 17276, only record the line if the line
20524 has never had a non-zero discriminator. */
20525 if (!line_has_non_zero_discriminator
)
20530 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
20531 in the line table of subfile SUBFILE. */
20534 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20535 unsigned int line
, CORE_ADDR address
,
20536 record_line_ftype p_record_line
)
20538 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20540 if (dwarf_line_debug
)
20542 fprintf_unfiltered (gdb_stdlog
,
20543 "Recording line %u, file %s, address %s\n",
20544 line
, lbasename (subfile
->name
),
20545 paddress (gdbarch
, address
));
20548 (*p_record_line
) (subfile
, line
, addr
);
20551 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20552 Mark the end of a set of line number records.
20553 The arguments are the same as for dwarf_record_line_1.
20554 If SUBFILE is NULL the request is ignored. */
20557 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20558 CORE_ADDR address
, record_line_ftype p_record_line
)
20560 if (subfile
== NULL
)
20563 if (dwarf_line_debug
)
20565 fprintf_unfiltered (gdb_stdlog
,
20566 "Finishing current line, file %s, address %s\n",
20567 lbasename (subfile
->name
),
20568 paddress (gdbarch
, address
));
20571 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
20575 lnp_state_machine::record_line (bool end_sequence
)
20577 if (dwarf_line_debug
)
20579 fprintf_unfiltered (gdb_stdlog
,
20580 "Processing actual line %u: file %u,"
20581 " address %s, is_stmt %u, discrim %u\n",
20582 m_line
, to_underlying (m_file
),
20583 paddress (m_gdbarch
, m_address
),
20584 m_is_stmt
, m_discriminator
);
20587 file_entry
*fe
= current_file ();
20590 dwarf2_debug_line_missing_file_complaint ();
20591 /* For now we ignore lines not starting on an instruction boundary.
20592 But not when processing end_sequence for compatibility with the
20593 previous version of the code. */
20594 else if (m_op_index
== 0 || end_sequence
)
20596 fe
->included_p
= 1;
20597 if (m_record_lines_p
&& m_is_stmt
)
20599 if (m_last_subfile
!= current_subfile
|| end_sequence
)
20601 dwarf_finish_line (m_gdbarch
, m_last_subfile
,
20602 m_address
, m_record_line_callback
);
20607 if (dwarf_record_line_p (m_line
, m_last_line
,
20608 m_line_has_non_zero_discriminator
,
20611 dwarf_record_line_1 (m_gdbarch
, current_subfile
,
20613 m_record_line_callback
);
20615 m_last_subfile
= current_subfile
;
20616 m_last_line
= m_line
;
20622 lnp_state_machine::lnp_state_machine (gdbarch
*arch
, line_header
*lh
,
20623 bool record_lines_p
)
20626 m_record_lines_p
= record_lines_p
;
20627 m_line_header
= lh
;
20629 m_record_line_callback
= ::record_line
;
20631 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20632 was a line entry for it so that the backend has a chance to adjust it
20633 and also record it in case it needs it. This is currently used by MIPS
20634 code, cf. `mips_adjust_dwarf2_line'. */
20635 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20636 m_is_stmt
= lh
->default_is_stmt
;
20637 m_discriminator
= 0;
20641 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20642 const gdb_byte
*line_ptr
,
20643 CORE_ADDR lowpc
, CORE_ADDR address
)
20645 /* If address < lowpc then it's not a usable value, it's outside the
20646 pc range of the CU. However, we restrict the test to only address
20647 values of zero to preserve GDB's previous behaviour which is to
20648 handle the specific case of a function being GC'd by the linker. */
20650 if (address
== 0 && address
< lowpc
)
20652 /* This line table is for a function which has been
20653 GCd by the linker. Ignore it. PR gdb/12528 */
20655 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20656 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20658 complaint (&symfile_complaints
,
20659 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20660 line_offset
, objfile_name (objfile
));
20661 m_record_line_callback
= noop_record_line
;
20662 /* Note: record_line_callback is left as noop_record_line until
20663 we see DW_LNE_end_sequence. */
20667 /* Subroutine of dwarf_decode_lines to simplify it.
20668 Process the line number information in LH.
20669 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20670 program in order to set included_p for every referenced header. */
20673 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20674 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20676 const gdb_byte
*line_ptr
, *extended_end
;
20677 const gdb_byte
*line_end
;
20678 unsigned int bytes_read
, extended_len
;
20679 unsigned char op_code
, extended_op
;
20680 CORE_ADDR baseaddr
;
20681 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20682 bfd
*abfd
= objfile
->obfd
;
20683 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
20684 /* True if we're recording line info (as opposed to building partial
20685 symtabs and just interested in finding include files mentioned by
20686 the line number program). */
20687 bool record_lines_p
= !decode_for_pst_p
;
20689 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
20691 line_ptr
= lh
->statement_program_start
;
20692 line_end
= lh
->statement_program_end
;
20694 /* Read the statement sequences until there's nothing left. */
20695 while (line_ptr
< line_end
)
20697 /* The DWARF line number program state machine. Reset the state
20698 machine at the start of each sequence. */
20699 lnp_state_machine
state_machine (gdbarch
, lh
, record_lines_p
);
20700 bool end_sequence
= false;
20702 if (record_lines_p
)
20704 /* Start a subfile for the current file of the state
20706 const file_entry
*fe
= state_machine
.current_file ();
20709 dwarf2_start_subfile (fe
->name
, fe
->include_dir (lh
));
20712 /* Decode the table. */
20713 while (line_ptr
< line_end
&& !end_sequence
)
20715 op_code
= read_1_byte (abfd
, line_ptr
);
20718 if (op_code
>= lh
->opcode_base
)
20720 /* Special opcode. */
20721 state_machine
.handle_special_opcode (op_code
);
20723 else switch (op_code
)
20725 case DW_LNS_extended_op
:
20726 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
20728 line_ptr
+= bytes_read
;
20729 extended_end
= line_ptr
+ extended_len
;
20730 extended_op
= read_1_byte (abfd
, line_ptr
);
20732 switch (extended_op
)
20734 case DW_LNE_end_sequence
:
20735 state_machine
.handle_end_sequence ();
20736 end_sequence
= true;
20738 case DW_LNE_set_address
:
20741 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
20742 line_ptr
+= bytes_read
;
20744 state_machine
.check_line_address (cu
, line_ptr
,
20746 state_machine
.handle_set_address (baseaddr
, address
);
20749 case DW_LNE_define_file
:
20751 const char *cur_file
;
20752 unsigned int mod_time
, length
;
20755 cur_file
= read_direct_string (abfd
, line_ptr
,
20757 line_ptr
+= bytes_read
;
20758 dindex
= (dir_index
)
20759 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20760 line_ptr
+= bytes_read
;
20762 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20763 line_ptr
+= bytes_read
;
20765 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20766 line_ptr
+= bytes_read
;
20767 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
20770 case DW_LNE_set_discriminator
:
20772 /* The discriminator is not interesting to the
20773 debugger; just ignore it. We still need to
20774 check its value though:
20775 if there are consecutive entries for the same
20776 (non-prologue) line we want to coalesce them.
20779 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20780 line_ptr
+= bytes_read
;
20782 state_machine
.handle_set_discriminator (discr
);
20786 complaint (&symfile_complaints
,
20787 _("mangled .debug_line section"));
20790 /* Make sure that we parsed the extended op correctly. If e.g.
20791 we expected a different address size than the producer used,
20792 we may have read the wrong number of bytes. */
20793 if (line_ptr
!= extended_end
)
20795 complaint (&symfile_complaints
,
20796 _("mangled .debug_line section"));
20801 state_machine
.handle_copy ();
20803 case DW_LNS_advance_pc
:
20806 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20807 line_ptr
+= bytes_read
;
20809 state_machine
.handle_advance_pc (adjust
);
20812 case DW_LNS_advance_line
:
20815 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
20816 line_ptr
+= bytes_read
;
20818 state_machine
.handle_advance_line (line_delta
);
20821 case DW_LNS_set_file
:
20823 file_name_index file
20824 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
20826 line_ptr
+= bytes_read
;
20828 state_machine
.handle_set_file (file
);
20831 case DW_LNS_set_column
:
20832 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20833 line_ptr
+= bytes_read
;
20835 case DW_LNS_negate_stmt
:
20836 state_machine
.handle_negate_stmt ();
20838 case DW_LNS_set_basic_block
:
20840 /* Add to the address register of the state machine the
20841 address increment value corresponding to special opcode
20842 255. I.e., this value is scaled by the minimum
20843 instruction length since special opcode 255 would have
20844 scaled the increment. */
20845 case DW_LNS_const_add_pc
:
20846 state_machine
.handle_const_add_pc ();
20848 case DW_LNS_fixed_advance_pc
:
20850 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
20853 state_machine
.handle_fixed_advance_pc (addr_adj
);
20858 /* Unknown standard opcode, ignore it. */
20861 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
20863 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20864 line_ptr
+= bytes_read
;
20871 dwarf2_debug_line_missing_end_sequence_complaint ();
20873 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
20874 in which case we still finish recording the last line). */
20875 state_machine
.record_line (true);
20879 /* Decode the Line Number Program (LNP) for the given line_header
20880 structure and CU. The actual information extracted and the type
20881 of structures created from the LNP depends on the value of PST.
20883 1. If PST is NULL, then this procedure uses the data from the program
20884 to create all necessary symbol tables, and their linetables.
20886 2. If PST is not NULL, this procedure reads the program to determine
20887 the list of files included by the unit represented by PST, and
20888 builds all the associated partial symbol tables.
20890 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20891 It is used for relative paths in the line table.
20892 NOTE: When processing partial symtabs (pst != NULL),
20893 comp_dir == pst->dirname.
20895 NOTE: It is important that psymtabs have the same file name (via strcmp)
20896 as the corresponding symtab. Since COMP_DIR is not used in the name of the
20897 symtab we don't use it in the name of the psymtabs we create.
20898 E.g. expand_line_sal requires this when finding psymtabs to expand.
20899 A good testcase for this is mb-inline.exp.
20901 LOWPC is the lowest address in CU (or 0 if not known).
20903 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
20904 for its PC<->lines mapping information. Otherwise only the filename
20905 table is read in. */
20908 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
20909 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
20910 CORE_ADDR lowpc
, int decode_mapping
)
20912 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20913 const int decode_for_pst_p
= (pst
!= NULL
);
20915 if (decode_mapping
)
20916 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
20918 if (decode_for_pst_p
)
20922 /* Now that we're done scanning the Line Header Program, we can
20923 create the psymtab of each included file. */
20924 for (file_index
= 0; file_index
< lh
->file_names
.size (); file_index
++)
20925 if (lh
->file_names
[file_index
].included_p
== 1)
20927 gdb::unique_xmalloc_ptr
<char> name_holder
;
20928 const char *include_name
=
20929 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
,
20931 if (include_name
!= NULL
)
20932 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
20937 /* Make sure a symtab is created for every file, even files
20938 which contain only variables (i.e. no code with associated
20940 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
20943 for (i
= 0; i
< lh
->file_names
.size (); i
++)
20945 file_entry
&fe
= lh
->file_names
[i
];
20947 dwarf2_start_subfile (fe
.name
, fe
.include_dir (lh
));
20949 if (current_subfile
->symtab
== NULL
)
20951 current_subfile
->symtab
20952 = allocate_symtab (cust
, current_subfile
->name
);
20954 fe
.symtab
= current_subfile
->symtab
;
20959 /* Start a subfile for DWARF. FILENAME is the name of the file and
20960 DIRNAME the name of the source directory which contains FILENAME
20961 or NULL if not known.
20962 This routine tries to keep line numbers from identical absolute and
20963 relative file names in a common subfile.
20965 Using the `list' example from the GDB testsuite, which resides in
20966 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
20967 of /srcdir/list0.c yields the following debugging information for list0.c:
20969 DW_AT_name: /srcdir/list0.c
20970 DW_AT_comp_dir: /compdir
20971 files.files[0].name: list0.h
20972 files.files[0].dir: /srcdir
20973 files.files[1].name: list0.c
20974 files.files[1].dir: /srcdir
20976 The line number information for list0.c has to end up in a single
20977 subfile, so that `break /srcdir/list0.c:1' works as expected.
20978 start_subfile will ensure that this happens provided that we pass the
20979 concatenation of files.files[1].dir and files.files[1].name as the
20983 dwarf2_start_subfile (const char *filename
, const char *dirname
)
20987 /* In order not to lose the line information directory,
20988 we concatenate it to the filename when it makes sense.
20989 Note that the Dwarf3 standard says (speaking of filenames in line
20990 information): ``The directory index is ignored for file names
20991 that represent full path names''. Thus ignoring dirname in the
20992 `else' branch below isn't an issue. */
20994 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
20996 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
21000 start_subfile (filename
);
21006 /* Start a symtab for DWARF.
21007 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
21009 static struct compunit_symtab
*
21010 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
21011 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
21013 struct compunit_symtab
*cust
21014 = start_symtab (cu
->per_cu
->dwarf2_per_objfile
->objfile
, name
, comp_dir
,
21015 low_pc
, cu
->language
);
21017 record_debugformat ("DWARF 2");
21018 record_producer (cu
->producer
);
21020 /* We assume that we're processing GCC output. */
21021 processing_gcc_compilation
= 2;
21023 cu
->processing_has_namespace_info
= 0;
21029 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
21030 struct dwarf2_cu
*cu
)
21032 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21033 struct comp_unit_head
*cu_header
= &cu
->header
;
21035 /* NOTE drow/2003-01-30: There used to be a comment and some special
21036 code here to turn a symbol with DW_AT_external and a
21037 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
21038 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
21039 with some versions of binutils) where shared libraries could have
21040 relocations against symbols in their debug information - the
21041 minimal symbol would have the right address, but the debug info
21042 would not. It's no longer necessary, because we will explicitly
21043 apply relocations when we read in the debug information now. */
21045 /* A DW_AT_location attribute with no contents indicates that a
21046 variable has been optimized away. */
21047 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
21049 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21053 /* Handle one degenerate form of location expression specially, to
21054 preserve GDB's previous behavior when section offsets are
21055 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
21056 then mark this symbol as LOC_STATIC. */
21058 if (attr_form_is_block (attr
)
21059 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
21060 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
21061 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
21062 && (DW_BLOCK (attr
)->size
21063 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
21065 unsigned int dummy
;
21067 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
21068 SYMBOL_VALUE_ADDRESS (sym
) =
21069 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
21071 SYMBOL_VALUE_ADDRESS (sym
) =
21072 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
21073 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
21074 fixup_symbol_section (sym
, objfile
);
21075 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
21076 SYMBOL_SECTION (sym
));
21080 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
21081 expression evaluator, and use LOC_COMPUTED only when necessary
21082 (i.e. when the value of a register or memory location is
21083 referenced, or a thread-local block, etc.). Then again, it might
21084 not be worthwhile. I'm assuming that it isn't unless performance
21085 or memory numbers show me otherwise. */
21087 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
21089 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
21090 cu
->has_loclist
= 1;
21093 /* Given a pointer to a DWARF information entry, figure out if we need
21094 to make a symbol table entry for it, and if so, create a new entry
21095 and return a pointer to it.
21096 If TYPE is NULL, determine symbol type from the die, otherwise
21097 used the passed type.
21098 If SPACE is not NULL, use it to hold the new symbol. If it is
21099 NULL, allocate a new symbol on the objfile's obstack. */
21101 static struct symbol
*
21102 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
21103 struct symbol
*space
)
21105 struct dwarf2_per_objfile
*dwarf2_per_objfile
21106 = cu
->per_cu
->dwarf2_per_objfile
;
21107 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21108 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21109 struct symbol
*sym
= NULL
;
21111 struct attribute
*attr
= NULL
;
21112 struct attribute
*attr2
= NULL
;
21113 CORE_ADDR baseaddr
;
21114 struct pending
**list_to_add
= NULL
;
21116 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
21118 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21120 name
= dwarf2_name (die
, cu
);
21123 const char *linkagename
;
21124 int suppress_add
= 0;
21129 sym
= allocate_symbol (objfile
);
21130 OBJSTAT (objfile
, n_syms
++);
21132 /* Cache this symbol's name and the name's demangled form (if any). */
21133 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
21134 linkagename
= dwarf2_physname (name
, die
, cu
);
21135 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
21137 /* Fortran does not have mangling standard and the mangling does differ
21138 between gfortran, iFort etc. */
21139 if (cu
->language
== language_fortran
21140 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
21141 symbol_set_demangled_name (&(sym
->ginfo
),
21142 dwarf2_full_name (name
, die
, cu
),
21145 /* Default assumptions.
21146 Use the passed type or decode it from the die. */
21147 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21148 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21150 SYMBOL_TYPE (sym
) = type
;
21152 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
21153 attr
= dwarf2_attr (die
,
21154 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
21158 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
21161 attr
= dwarf2_attr (die
,
21162 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
21166 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
21167 struct file_entry
*fe
;
21169 if (cu
->line_header
!= NULL
)
21170 fe
= cu
->line_header
->file_name_at (file_index
);
21175 complaint (&symfile_complaints
,
21176 _("file index out of range"));
21178 symbol_set_symtab (sym
, fe
->symtab
);
21184 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
21189 addr
= attr_value_as_address (attr
);
21190 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
21191 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
21193 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
21194 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
21195 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
21196 add_symbol_to_list (sym
, cu
->list_in_scope
);
21198 case DW_TAG_subprogram
:
21199 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21201 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21202 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21203 if ((attr2
&& (DW_UNSND (attr2
) != 0))
21204 || cu
->language
== language_ada
)
21206 /* Subprograms marked external are stored as a global symbol.
21207 Ada subprograms, whether marked external or not, are always
21208 stored as a global symbol, because we want to be able to
21209 access them globally. For instance, we want to be able
21210 to break on a nested subprogram without having to
21211 specify the context. */
21212 list_to_add
= &global_symbols
;
21216 list_to_add
= cu
->list_in_scope
;
21219 case DW_TAG_inlined_subroutine
:
21220 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21222 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21223 SYMBOL_INLINED (sym
) = 1;
21224 list_to_add
= cu
->list_in_scope
;
21226 case DW_TAG_template_value_param
:
21228 /* Fall through. */
21229 case DW_TAG_constant
:
21230 case DW_TAG_variable
:
21231 case DW_TAG_member
:
21232 /* Compilation with minimal debug info may result in
21233 variables with missing type entries. Change the
21234 misleading `void' type to something sensible. */
21235 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
21236 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
21238 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21239 /* In the case of DW_TAG_member, we should only be called for
21240 static const members. */
21241 if (die
->tag
== DW_TAG_member
)
21243 /* dwarf2_add_field uses die_is_declaration,
21244 so we do the same. */
21245 gdb_assert (die_is_declaration (die
, cu
));
21250 dwarf2_const_value (attr
, sym
, cu
);
21251 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21254 if (attr2
&& (DW_UNSND (attr2
) != 0))
21255 list_to_add
= &global_symbols
;
21257 list_to_add
= cu
->list_in_scope
;
21261 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21264 var_decode_location (attr
, sym
, cu
);
21265 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21267 /* Fortran explicitly imports any global symbols to the local
21268 scope by DW_TAG_common_block. */
21269 if (cu
->language
== language_fortran
&& die
->parent
21270 && die
->parent
->tag
== DW_TAG_common_block
)
21273 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21274 && SYMBOL_VALUE_ADDRESS (sym
) == 0
21275 && !dwarf2_per_objfile
->has_section_at_zero
)
21277 /* When a static variable is eliminated by the linker,
21278 the corresponding debug information is not stripped
21279 out, but the variable address is set to null;
21280 do not add such variables into symbol table. */
21282 else if (attr2
&& (DW_UNSND (attr2
) != 0))
21284 /* Workaround gfortran PR debug/40040 - it uses
21285 DW_AT_location for variables in -fPIC libraries which may
21286 get overriden by other libraries/executable and get
21287 a different address. Resolve it by the minimal symbol
21288 which may come from inferior's executable using copy
21289 relocation. Make this workaround only for gfortran as for
21290 other compilers GDB cannot guess the minimal symbol
21291 Fortran mangling kind. */
21292 if (cu
->language
== language_fortran
&& die
->parent
21293 && die
->parent
->tag
== DW_TAG_module
21295 && startswith (cu
->producer
, "GNU Fortran"))
21296 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21298 /* A variable with DW_AT_external is never static,
21299 but it may be block-scoped. */
21300 list_to_add
= (cu
->list_in_scope
== &file_symbols
21301 ? &global_symbols
: cu
->list_in_scope
);
21304 list_to_add
= cu
->list_in_scope
;
21308 /* We do not know the address of this symbol.
21309 If it is an external symbol and we have type information
21310 for it, enter the symbol as a LOC_UNRESOLVED symbol.
21311 The address of the variable will then be determined from
21312 the minimal symbol table whenever the variable is
21314 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21316 /* Fortran explicitly imports any global symbols to the local
21317 scope by DW_TAG_common_block. */
21318 if (cu
->language
== language_fortran
&& die
->parent
21319 && die
->parent
->tag
== DW_TAG_common_block
)
21321 /* SYMBOL_CLASS doesn't matter here because
21322 read_common_block is going to reset it. */
21324 list_to_add
= cu
->list_in_scope
;
21326 else if (attr2
&& (DW_UNSND (attr2
) != 0)
21327 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
21329 /* A variable with DW_AT_external is never static, but it
21330 may be block-scoped. */
21331 list_to_add
= (cu
->list_in_scope
== &file_symbols
21332 ? &global_symbols
: cu
->list_in_scope
);
21334 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21336 else if (!die_is_declaration (die
, cu
))
21338 /* Use the default LOC_OPTIMIZED_OUT class. */
21339 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
21341 list_to_add
= cu
->list_in_scope
;
21345 case DW_TAG_formal_parameter
:
21346 /* If we are inside a function, mark this as an argument. If
21347 not, we might be looking at an argument to an inlined function
21348 when we do not have enough information to show inlined frames;
21349 pretend it's a local variable in that case so that the user can
21351 if (context_stack_depth
> 0
21352 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
21353 SYMBOL_IS_ARGUMENT (sym
) = 1;
21354 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21357 var_decode_location (attr
, sym
, cu
);
21359 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21362 dwarf2_const_value (attr
, sym
, cu
);
21365 list_to_add
= cu
->list_in_scope
;
21367 case DW_TAG_unspecified_parameters
:
21368 /* From varargs functions; gdb doesn't seem to have any
21369 interest in this information, so just ignore it for now.
21372 case DW_TAG_template_type_param
:
21374 /* Fall through. */
21375 case DW_TAG_class_type
:
21376 case DW_TAG_interface_type
:
21377 case DW_TAG_structure_type
:
21378 case DW_TAG_union_type
:
21379 case DW_TAG_set_type
:
21380 case DW_TAG_enumeration_type
:
21381 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21382 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
21385 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
21386 really ever be static objects: otherwise, if you try
21387 to, say, break of a class's method and you're in a file
21388 which doesn't mention that class, it won't work unless
21389 the check for all static symbols in lookup_symbol_aux
21390 saves you. See the OtherFileClass tests in
21391 gdb.c++/namespace.exp. */
21395 list_to_add
= (cu
->list_in_scope
== &file_symbols
21396 && cu
->language
== language_cplus
21397 ? &global_symbols
: cu
->list_in_scope
);
21399 /* The semantics of C++ state that "struct foo {
21400 ... }" also defines a typedef for "foo". */
21401 if (cu
->language
== language_cplus
21402 || cu
->language
== language_ada
21403 || cu
->language
== language_d
21404 || cu
->language
== language_rust
)
21406 /* The symbol's name is already allocated along
21407 with this objfile, so we don't need to
21408 duplicate it for the type. */
21409 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
21410 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
21415 case DW_TAG_typedef
:
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_base_type
:
21421 case DW_TAG_subrange_type
:
21422 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21423 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21424 list_to_add
= cu
->list_in_scope
;
21426 case DW_TAG_enumerator
:
21427 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21430 dwarf2_const_value (attr
, sym
, cu
);
21433 /* NOTE: carlton/2003-11-10: See comment above in the
21434 DW_TAG_class_type, etc. block. */
21436 list_to_add
= (cu
->list_in_scope
== &file_symbols
21437 && cu
->language
== language_cplus
21438 ? &global_symbols
: cu
->list_in_scope
);
21441 case DW_TAG_imported_declaration
:
21442 case DW_TAG_namespace
:
21443 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21444 list_to_add
= &global_symbols
;
21446 case DW_TAG_module
:
21447 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21448 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
21449 list_to_add
= &global_symbols
;
21451 case DW_TAG_common_block
:
21452 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
21453 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
21454 add_symbol_to_list (sym
, cu
->list_in_scope
);
21457 /* Not a tag we recognize. Hopefully we aren't processing
21458 trash data, but since we must specifically ignore things
21459 we don't recognize, there is nothing else we should do at
21461 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
21462 dwarf_tag_name (die
->tag
));
21468 sym
->hash_next
= objfile
->template_symbols
;
21469 objfile
->template_symbols
= sym
;
21470 list_to_add
= NULL
;
21473 if (list_to_add
!= NULL
)
21474 add_symbol_to_list (sym
, list_to_add
);
21476 /* For the benefit of old versions of GCC, check for anonymous
21477 namespaces based on the demangled name. */
21478 if (!cu
->processing_has_namespace_info
21479 && cu
->language
== language_cplus
)
21480 cp_scan_for_anonymous_namespaces (sym
, objfile
);
21485 /* Given an attr with a DW_FORM_dataN value in host byte order,
21486 zero-extend it as appropriate for the symbol's type. The DWARF
21487 standard (v4) is not entirely clear about the meaning of using
21488 DW_FORM_dataN for a constant with a signed type, where the type is
21489 wider than the data. The conclusion of a discussion on the DWARF
21490 list was that this is unspecified. We choose to always zero-extend
21491 because that is the interpretation long in use by GCC. */
21494 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21495 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21497 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21498 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21499 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21500 LONGEST l
= DW_UNSND (attr
);
21502 if (bits
< sizeof (*value
) * 8)
21504 l
&= ((LONGEST
) 1 << bits
) - 1;
21507 else if (bits
== sizeof (*value
) * 8)
21511 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21512 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21519 /* Read a constant value from an attribute. Either set *VALUE, or if
21520 the value does not fit in *VALUE, set *BYTES - either already
21521 allocated on the objfile obstack, or newly allocated on OBSTACK,
21522 or, set *BATON, if we translated the constant to a location
21526 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21527 const char *name
, struct obstack
*obstack
,
21528 struct dwarf2_cu
*cu
,
21529 LONGEST
*value
, const gdb_byte
**bytes
,
21530 struct dwarf2_locexpr_baton
**baton
)
21532 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21533 struct comp_unit_head
*cu_header
= &cu
->header
;
21534 struct dwarf_block
*blk
;
21535 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21536 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21542 switch (attr
->form
)
21545 case DW_FORM_GNU_addr_index
:
21549 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21550 dwarf2_const_value_length_mismatch_complaint (name
,
21551 cu_header
->addr_size
,
21552 TYPE_LENGTH (type
));
21553 /* Symbols of this form are reasonably rare, so we just
21554 piggyback on the existing location code rather than writing
21555 a new implementation of symbol_computed_ops. */
21556 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21557 (*baton
)->per_cu
= cu
->per_cu
;
21558 gdb_assert ((*baton
)->per_cu
);
21560 (*baton
)->size
= 2 + cu_header
->addr_size
;
21561 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21562 (*baton
)->data
= data
;
21564 data
[0] = DW_OP_addr
;
21565 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21566 byte_order
, DW_ADDR (attr
));
21567 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21570 case DW_FORM_string
:
21572 case DW_FORM_GNU_str_index
:
21573 case DW_FORM_GNU_strp_alt
:
21574 /* DW_STRING is already allocated on the objfile obstack, point
21576 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21578 case DW_FORM_block1
:
21579 case DW_FORM_block2
:
21580 case DW_FORM_block4
:
21581 case DW_FORM_block
:
21582 case DW_FORM_exprloc
:
21583 case DW_FORM_data16
:
21584 blk
= DW_BLOCK (attr
);
21585 if (TYPE_LENGTH (type
) != blk
->size
)
21586 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21587 TYPE_LENGTH (type
));
21588 *bytes
= blk
->data
;
21591 /* The DW_AT_const_value attributes are supposed to carry the
21592 symbol's value "represented as it would be on the target
21593 architecture." By the time we get here, it's already been
21594 converted to host endianness, so we just need to sign- or
21595 zero-extend it as appropriate. */
21596 case DW_FORM_data1
:
21597 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21599 case DW_FORM_data2
:
21600 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21602 case DW_FORM_data4
:
21603 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21605 case DW_FORM_data8
:
21606 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21609 case DW_FORM_sdata
:
21610 case DW_FORM_implicit_const
:
21611 *value
= DW_SND (attr
);
21614 case DW_FORM_udata
:
21615 *value
= DW_UNSND (attr
);
21619 complaint (&symfile_complaints
,
21620 _("unsupported const value attribute form: '%s'"),
21621 dwarf_form_name (attr
->form
));
21628 /* Copy constant value from an attribute to a symbol. */
21631 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21632 struct dwarf2_cu
*cu
)
21634 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21636 const gdb_byte
*bytes
;
21637 struct dwarf2_locexpr_baton
*baton
;
21639 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21640 SYMBOL_PRINT_NAME (sym
),
21641 &objfile
->objfile_obstack
, cu
,
21642 &value
, &bytes
, &baton
);
21646 SYMBOL_LOCATION_BATON (sym
) = baton
;
21647 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21649 else if (bytes
!= NULL
)
21651 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21652 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21656 SYMBOL_VALUE (sym
) = value
;
21657 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21661 /* Return the type of the die in question using its DW_AT_type attribute. */
21663 static struct type
*
21664 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21666 struct attribute
*type_attr
;
21668 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21671 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21672 /* A missing DW_AT_type represents a void type. */
21673 return objfile_type (objfile
)->builtin_void
;
21676 return lookup_die_type (die
, type_attr
, cu
);
21679 /* True iff CU's producer generates GNAT Ada auxiliary information
21680 that allows to find parallel types through that information instead
21681 of having to do expensive parallel lookups by type name. */
21684 need_gnat_info (struct dwarf2_cu
*cu
)
21686 /* Assume that the Ada compiler was GNAT, which always produces
21687 the auxiliary information. */
21688 return (cu
->language
== language_ada
);
21691 /* Return the auxiliary type of the die in question using its
21692 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
21693 attribute is not present. */
21695 static struct type
*
21696 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21698 struct attribute
*type_attr
;
21700 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
21704 return lookup_die_type (die
, type_attr
, cu
);
21707 /* If DIE has a descriptive_type attribute, then set the TYPE's
21708 descriptive type accordingly. */
21711 set_descriptive_type (struct type
*type
, struct die_info
*die
,
21712 struct dwarf2_cu
*cu
)
21714 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
21716 if (descriptive_type
)
21718 ALLOCATE_GNAT_AUX_TYPE (type
);
21719 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
21723 /* Return the containing type of the die in question using its
21724 DW_AT_containing_type attribute. */
21726 static struct type
*
21727 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21729 struct attribute
*type_attr
;
21730 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21732 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
21734 error (_("Dwarf Error: Problem turning containing type into gdb type "
21735 "[in module %s]"), objfile_name (objfile
));
21737 return lookup_die_type (die
, type_attr
, cu
);
21740 /* Return an error marker type to use for the ill formed type in DIE/CU. */
21742 static struct type
*
21743 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
21745 struct dwarf2_per_objfile
*dwarf2_per_objfile
21746 = cu
->per_cu
->dwarf2_per_objfile
;
21747 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21748 char *message
, *saved
;
21750 message
= xstrprintf (_("<unknown type in %s, CU %s, DIE %s>"),
21751 objfile_name (objfile
),
21752 sect_offset_str (cu
->header
.sect_off
),
21753 sect_offset_str (die
->sect_off
));
21754 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
21755 message
, strlen (message
));
21758 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
21761 /* Look up the type of DIE in CU using its type attribute ATTR.
21762 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
21763 DW_AT_containing_type.
21764 If there is no type substitute an error marker. */
21766 static struct type
*
21767 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
21768 struct dwarf2_cu
*cu
)
21770 struct dwarf2_per_objfile
*dwarf2_per_objfile
21771 = cu
->per_cu
->dwarf2_per_objfile
;
21772 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21773 struct type
*this_type
;
21775 gdb_assert (attr
->name
== DW_AT_type
21776 || attr
->name
== DW_AT_GNAT_descriptive_type
21777 || attr
->name
== DW_AT_containing_type
);
21779 /* First see if we have it cached. */
21781 if (attr
->form
== DW_FORM_GNU_ref_alt
)
21783 struct dwarf2_per_cu_data
*per_cu
;
21784 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21786 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
21787 dwarf2_per_objfile
);
21788 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
21790 else if (attr_form_is_ref (attr
))
21792 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21794 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
21796 else if (attr
->form
== DW_FORM_ref_sig8
)
21798 ULONGEST signature
= DW_SIGNATURE (attr
);
21800 return get_signatured_type (die
, signature
, cu
);
21804 complaint (&symfile_complaints
,
21805 _("Dwarf Error: Bad type attribute %s in DIE"
21806 " at %s [in module %s]"),
21807 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
21808 objfile_name (objfile
));
21809 return build_error_marker_type (cu
, die
);
21812 /* If not cached we need to read it in. */
21814 if (this_type
== NULL
)
21816 struct die_info
*type_die
= NULL
;
21817 struct dwarf2_cu
*type_cu
= cu
;
21819 if (attr_form_is_ref (attr
))
21820 type_die
= follow_die_ref (die
, attr
, &type_cu
);
21821 if (type_die
== NULL
)
21822 return build_error_marker_type (cu
, die
);
21823 /* If we find the type now, it's probably because the type came
21824 from an inter-CU reference and the type's CU got expanded before
21826 this_type
= read_type_die (type_die
, type_cu
);
21829 /* If we still don't have a type use an error marker. */
21831 if (this_type
== NULL
)
21832 return build_error_marker_type (cu
, die
);
21837 /* Return the type in DIE, CU.
21838 Returns NULL for invalid types.
21840 This first does a lookup in die_type_hash,
21841 and only reads the die in if necessary.
21843 NOTE: This can be called when reading in partial or full symbols. */
21845 static struct type
*
21846 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
21848 struct type
*this_type
;
21850 this_type
= get_die_type (die
, cu
);
21854 return read_type_die_1 (die
, cu
);
21857 /* Read the type in DIE, CU.
21858 Returns NULL for invalid types. */
21860 static struct type
*
21861 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
21863 struct type
*this_type
= NULL
;
21867 case DW_TAG_class_type
:
21868 case DW_TAG_interface_type
:
21869 case DW_TAG_structure_type
:
21870 case DW_TAG_union_type
:
21871 this_type
= read_structure_type (die
, cu
);
21873 case DW_TAG_enumeration_type
:
21874 this_type
= read_enumeration_type (die
, cu
);
21876 case DW_TAG_subprogram
:
21877 case DW_TAG_subroutine_type
:
21878 case DW_TAG_inlined_subroutine
:
21879 this_type
= read_subroutine_type (die
, cu
);
21881 case DW_TAG_array_type
:
21882 this_type
= read_array_type (die
, cu
);
21884 case DW_TAG_set_type
:
21885 this_type
= read_set_type (die
, cu
);
21887 case DW_TAG_pointer_type
:
21888 this_type
= read_tag_pointer_type (die
, cu
);
21890 case DW_TAG_ptr_to_member_type
:
21891 this_type
= read_tag_ptr_to_member_type (die
, cu
);
21893 case DW_TAG_reference_type
:
21894 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
21896 case DW_TAG_rvalue_reference_type
:
21897 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
21899 case DW_TAG_const_type
:
21900 this_type
= read_tag_const_type (die
, cu
);
21902 case DW_TAG_volatile_type
:
21903 this_type
= read_tag_volatile_type (die
, cu
);
21905 case DW_TAG_restrict_type
:
21906 this_type
= read_tag_restrict_type (die
, cu
);
21908 case DW_TAG_string_type
:
21909 this_type
= read_tag_string_type (die
, cu
);
21911 case DW_TAG_typedef
:
21912 this_type
= read_typedef (die
, cu
);
21914 case DW_TAG_subrange_type
:
21915 this_type
= read_subrange_type (die
, cu
);
21917 case DW_TAG_base_type
:
21918 this_type
= read_base_type (die
, cu
);
21920 case DW_TAG_unspecified_type
:
21921 this_type
= read_unspecified_type (die
, cu
);
21923 case DW_TAG_namespace
:
21924 this_type
= read_namespace_type (die
, cu
);
21926 case DW_TAG_module
:
21927 this_type
= read_module_type (die
, cu
);
21929 case DW_TAG_atomic_type
:
21930 this_type
= read_tag_atomic_type (die
, cu
);
21933 complaint (&symfile_complaints
,
21934 _("unexpected tag in read_type_die: '%s'"),
21935 dwarf_tag_name (die
->tag
));
21942 /* See if we can figure out if the class lives in a namespace. We do
21943 this by looking for a member function; its demangled name will
21944 contain namespace info, if there is any.
21945 Return the computed name or NULL.
21946 Space for the result is allocated on the objfile's obstack.
21947 This is the full-die version of guess_partial_die_structure_name.
21948 In this case we know DIE has no useful parent. */
21951 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
21953 struct die_info
*spec_die
;
21954 struct dwarf2_cu
*spec_cu
;
21955 struct die_info
*child
;
21956 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21959 spec_die
= die_specification (die
, &spec_cu
);
21960 if (spec_die
!= NULL
)
21966 for (child
= die
->child
;
21968 child
= child
->sibling
)
21970 if (child
->tag
== DW_TAG_subprogram
)
21972 const char *linkage_name
= dw2_linkage_name (child
, cu
);
21974 if (linkage_name
!= NULL
)
21977 = language_class_name_from_physname (cu
->language_defn
,
21981 if (actual_name
!= NULL
)
21983 const char *die_name
= dwarf2_name (die
, cu
);
21985 if (die_name
!= NULL
21986 && strcmp (die_name
, actual_name
) != 0)
21988 /* Strip off the class name from the full name.
21989 We want the prefix. */
21990 int die_name_len
= strlen (die_name
);
21991 int actual_name_len
= strlen (actual_name
);
21993 /* Test for '::' as a sanity check. */
21994 if (actual_name_len
> die_name_len
+ 2
21995 && actual_name
[actual_name_len
21996 - die_name_len
- 1] == ':')
21997 name
= (char *) obstack_copy0 (
21998 &objfile
->per_bfd
->storage_obstack
,
21999 actual_name
, actual_name_len
- die_name_len
- 2);
22002 xfree (actual_name
);
22011 /* GCC might emit a nameless typedef that has a linkage name. Determine the
22012 prefix part in such case. See
22013 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22015 static const char *
22016 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22018 struct attribute
*attr
;
22021 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
22022 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
22025 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
22028 attr
= dw2_linkage_name_attr (die
, cu
);
22029 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22032 /* dwarf2_name had to be already called. */
22033 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
22035 /* Strip the base name, keep any leading namespaces/classes. */
22036 base
= strrchr (DW_STRING (attr
), ':');
22037 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
22040 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22041 return (char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22043 &base
[-1] - DW_STRING (attr
));
22046 /* Return the name of the namespace/class that DIE is defined within,
22047 or "" if we can't tell. The caller should not xfree the result.
22049 For example, if we're within the method foo() in the following
22059 then determine_prefix on foo's die will return "N::C". */
22061 static const char *
22062 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22064 struct dwarf2_per_objfile
*dwarf2_per_objfile
22065 = cu
->per_cu
->dwarf2_per_objfile
;
22066 struct die_info
*parent
, *spec_die
;
22067 struct dwarf2_cu
*spec_cu
;
22068 struct type
*parent_type
;
22069 const char *retval
;
22071 if (cu
->language
!= language_cplus
22072 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
22073 && cu
->language
!= language_rust
)
22076 retval
= anonymous_struct_prefix (die
, cu
);
22080 /* We have to be careful in the presence of DW_AT_specification.
22081 For example, with GCC 3.4, given the code
22085 // Definition of N::foo.
22089 then we'll have a tree of DIEs like this:
22091 1: DW_TAG_compile_unit
22092 2: DW_TAG_namespace // N
22093 3: DW_TAG_subprogram // declaration of N::foo
22094 4: DW_TAG_subprogram // definition of N::foo
22095 DW_AT_specification // refers to die #3
22097 Thus, when processing die #4, we have to pretend that we're in
22098 the context of its DW_AT_specification, namely the contex of die
22101 spec_die
= die_specification (die
, &spec_cu
);
22102 if (spec_die
== NULL
)
22103 parent
= die
->parent
;
22106 parent
= spec_die
->parent
;
22110 if (parent
== NULL
)
22112 else if (parent
->building_fullname
)
22115 const char *parent_name
;
22117 /* It has been seen on RealView 2.2 built binaries,
22118 DW_TAG_template_type_param types actually _defined_ as
22119 children of the parent class:
22122 template class <class Enum> Class{};
22123 Class<enum E> class_e;
22125 1: DW_TAG_class_type (Class)
22126 2: DW_TAG_enumeration_type (E)
22127 3: DW_TAG_enumerator (enum1:0)
22128 3: DW_TAG_enumerator (enum2:1)
22130 2: DW_TAG_template_type_param
22131 DW_AT_type DW_FORM_ref_udata (E)
22133 Besides being broken debug info, it can put GDB into an
22134 infinite loop. Consider:
22136 When we're building the full name for Class<E>, we'll start
22137 at Class, and go look over its template type parameters,
22138 finding E. We'll then try to build the full name of E, and
22139 reach here. We're now trying to build the full name of E,
22140 and look over the parent DIE for containing scope. In the
22141 broken case, if we followed the parent DIE of E, we'd again
22142 find Class, and once again go look at its template type
22143 arguments, etc., etc. Simply don't consider such parent die
22144 as source-level parent of this die (it can't be, the language
22145 doesn't allow it), and break the loop here. */
22146 name
= dwarf2_name (die
, cu
);
22147 parent_name
= dwarf2_name (parent
, cu
);
22148 complaint (&symfile_complaints
,
22149 _("template param type '%s' defined within parent '%s'"),
22150 name
? name
: "<unknown>",
22151 parent_name
? parent_name
: "<unknown>");
22155 switch (parent
->tag
)
22157 case DW_TAG_namespace
:
22158 parent_type
= read_type_die (parent
, cu
);
22159 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
22160 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
22161 Work around this problem here. */
22162 if (cu
->language
== language_cplus
22163 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
22165 /* We give a name to even anonymous namespaces. */
22166 return TYPE_TAG_NAME (parent_type
);
22167 case DW_TAG_class_type
:
22168 case DW_TAG_interface_type
:
22169 case DW_TAG_structure_type
:
22170 case DW_TAG_union_type
:
22171 case DW_TAG_module
:
22172 parent_type
= read_type_die (parent
, cu
);
22173 if (TYPE_TAG_NAME (parent_type
) != NULL
)
22174 return TYPE_TAG_NAME (parent_type
);
22176 /* An anonymous structure is only allowed non-static data
22177 members; no typedefs, no member functions, et cetera.
22178 So it does not need a prefix. */
22180 case DW_TAG_compile_unit
:
22181 case DW_TAG_partial_unit
:
22182 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
22183 if (cu
->language
== language_cplus
22184 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
22185 && die
->child
!= NULL
22186 && (die
->tag
== DW_TAG_class_type
22187 || die
->tag
== DW_TAG_structure_type
22188 || die
->tag
== DW_TAG_union_type
))
22190 char *name
= guess_full_die_structure_name (die
, cu
);
22195 case DW_TAG_enumeration_type
:
22196 parent_type
= read_type_die (parent
, cu
);
22197 if (TYPE_DECLARED_CLASS (parent_type
))
22199 if (TYPE_TAG_NAME (parent_type
) != NULL
)
22200 return TYPE_TAG_NAME (parent_type
);
22203 /* Fall through. */
22205 return determine_prefix (parent
, cu
);
22209 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
22210 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
22211 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
22212 an obconcat, otherwise allocate storage for the result. The CU argument is
22213 used to determine the language and hence, the appropriate separator. */
22215 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
22218 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
22219 int physname
, struct dwarf2_cu
*cu
)
22221 const char *lead
= "";
22224 if (suffix
== NULL
|| suffix
[0] == '\0'
22225 || prefix
== NULL
|| prefix
[0] == '\0')
22227 else if (cu
->language
== language_d
)
22229 /* For D, the 'main' function could be defined in any module, but it
22230 should never be prefixed. */
22231 if (strcmp (suffix
, "D main") == 0)
22239 else if (cu
->language
== language_fortran
&& physname
)
22241 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
22242 DW_AT_MIPS_linkage_name is preferred and used instead. */
22250 if (prefix
== NULL
)
22252 if (suffix
== NULL
)
22259 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
22261 strcpy (retval
, lead
);
22262 strcat (retval
, prefix
);
22263 strcat (retval
, sep
);
22264 strcat (retval
, suffix
);
22269 /* We have an obstack. */
22270 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
22274 /* Return sibling of die, NULL if no sibling. */
22276 static struct die_info
*
22277 sibling_die (struct die_info
*die
)
22279 return die
->sibling
;
22282 /* Get name of a die, return NULL if not found. */
22284 static const char *
22285 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
22286 struct obstack
*obstack
)
22288 if (name
&& cu
->language
== language_cplus
)
22290 std::string canon_name
= cp_canonicalize_string (name
);
22292 if (!canon_name
.empty ())
22294 if (canon_name
!= name
)
22295 name
= (const char *) obstack_copy0 (obstack
,
22296 canon_name
.c_str (),
22297 canon_name
.length ());
22304 /* Get name of a die, return NULL if not found.
22305 Anonymous namespaces are converted to their magic string. */
22307 static const char *
22308 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22310 struct attribute
*attr
;
22311 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22313 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
22314 if ((!attr
|| !DW_STRING (attr
))
22315 && die
->tag
!= DW_TAG_namespace
22316 && die
->tag
!= DW_TAG_class_type
22317 && die
->tag
!= DW_TAG_interface_type
22318 && die
->tag
!= DW_TAG_structure_type
22319 && die
->tag
!= DW_TAG_union_type
)
22324 case DW_TAG_compile_unit
:
22325 case DW_TAG_partial_unit
:
22326 /* Compilation units have a DW_AT_name that is a filename, not
22327 a source language identifier. */
22328 case DW_TAG_enumeration_type
:
22329 case DW_TAG_enumerator
:
22330 /* These tags always have simple identifiers already; no need
22331 to canonicalize them. */
22332 return DW_STRING (attr
);
22334 case DW_TAG_namespace
:
22335 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
22336 return DW_STRING (attr
);
22337 return CP_ANONYMOUS_NAMESPACE_STR
;
22339 case DW_TAG_class_type
:
22340 case DW_TAG_interface_type
:
22341 case DW_TAG_structure_type
:
22342 case DW_TAG_union_type
:
22343 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
22344 structures or unions. These were of the form "._%d" in GCC 4.1,
22345 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
22346 and GCC 4.4. We work around this problem by ignoring these. */
22347 if (attr
&& DW_STRING (attr
)
22348 && (startswith (DW_STRING (attr
), "._")
22349 || startswith (DW_STRING (attr
), "<anonymous")))
22352 /* GCC might emit a nameless typedef that has a linkage name. See
22353 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22354 if (!attr
|| DW_STRING (attr
) == NULL
)
22356 char *demangled
= NULL
;
22358 attr
= dw2_linkage_name_attr (die
, cu
);
22359 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22362 /* Avoid demangling DW_STRING (attr) the second time on a second
22363 call for the same DIE. */
22364 if (!DW_STRING_IS_CANONICAL (attr
))
22365 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
22371 /* FIXME: we already did this for the partial symbol... */
22374 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22375 demangled
, strlen (demangled
)));
22376 DW_STRING_IS_CANONICAL (attr
) = 1;
22379 /* Strip any leading namespaces/classes, keep only the base name.
22380 DW_AT_name for named DIEs does not contain the prefixes. */
22381 base
= strrchr (DW_STRING (attr
), ':');
22382 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
22385 return DW_STRING (attr
);
22394 if (!DW_STRING_IS_CANONICAL (attr
))
22397 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
22398 &objfile
->per_bfd
->storage_obstack
);
22399 DW_STRING_IS_CANONICAL (attr
) = 1;
22401 return DW_STRING (attr
);
22404 /* Return the die that this die in an extension of, or NULL if there
22405 is none. *EXT_CU is the CU containing DIE on input, and the CU
22406 containing the return value on output. */
22408 static struct die_info
*
22409 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
22411 struct attribute
*attr
;
22413 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
22417 return follow_die_ref (die
, attr
, ext_cu
);
22420 /* Convert a DIE tag into its string name. */
22422 static const char *
22423 dwarf_tag_name (unsigned tag
)
22425 const char *name
= get_DW_TAG_name (tag
);
22428 return "DW_TAG_<unknown>";
22433 /* Convert a DWARF attribute code into its string name. */
22435 static const char *
22436 dwarf_attr_name (unsigned attr
)
22440 #ifdef MIPS /* collides with DW_AT_HP_block_index */
22441 if (attr
== DW_AT_MIPS_fde
)
22442 return "DW_AT_MIPS_fde";
22444 if (attr
== DW_AT_HP_block_index
)
22445 return "DW_AT_HP_block_index";
22448 name
= get_DW_AT_name (attr
);
22451 return "DW_AT_<unknown>";
22456 /* Convert a DWARF value form code into its string name. */
22458 static const char *
22459 dwarf_form_name (unsigned form
)
22461 const char *name
= get_DW_FORM_name (form
);
22464 return "DW_FORM_<unknown>";
22469 static const char *
22470 dwarf_bool_name (unsigned mybool
)
22478 /* Convert a DWARF type code into its string name. */
22480 static const char *
22481 dwarf_type_encoding_name (unsigned enc
)
22483 const char *name
= get_DW_ATE_name (enc
);
22486 return "DW_ATE_<unknown>";
22492 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
22496 print_spaces (indent
, f
);
22497 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
22498 dwarf_tag_name (die
->tag
), die
->abbrev
,
22499 sect_offset_str (die
->sect_off
));
22501 if (die
->parent
!= NULL
)
22503 print_spaces (indent
, f
);
22504 fprintf_unfiltered (f
, " parent at offset: %s\n",
22505 sect_offset_str (die
->parent
->sect_off
));
22508 print_spaces (indent
, f
);
22509 fprintf_unfiltered (f
, " has children: %s\n",
22510 dwarf_bool_name (die
->child
!= NULL
));
22512 print_spaces (indent
, f
);
22513 fprintf_unfiltered (f
, " attributes:\n");
22515 for (i
= 0; i
< die
->num_attrs
; ++i
)
22517 print_spaces (indent
, f
);
22518 fprintf_unfiltered (f
, " %s (%s) ",
22519 dwarf_attr_name (die
->attrs
[i
].name
),
22520 dwarf_form_name (die
->attrs
[i
].form
));
22522 switch (die
->attrs
[i
].form
)
22525 case DW_FORM_GNU_addr_index
:
22526 fprintf_unfiltered (f
, "address: ");
22527 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
22529 case DW_FORM_block2
:
22530 case DW_FORM_block4
:
22531 case DW_FORM_block
:
22532 case DW_FORM_block1
:
22533 fprintf_unfiltered (f
, "block: size %s",
22534 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22536 case DW_FORM_exprloc
:
22537 fprintf_unfiltered (f
, "expression: size %s",
22538 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22540 case DW_FORM_data16
:
22541 fprintf_unfiltered (f
, "constant of 16 bytes");
22543 case DW_FORM_ref_addr
:
22544 fprintf_unfiltered (f
, "ref address: ");
22545 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22547 case DW_FORM_GNU_ref_alt
:
22548 fprintf_unfiltered (f
, "alt ref address: ");
22549 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22555 case DW_FORM_ref_udata
:
22556 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
22557 (long) (DW_UNSND (&die
->attrs
[i
])));
22559 case DW_FORM_data1
:
22560 case DW_FORM_data2
:
22561 case DW_FORM_data4
:
22562 case DW_FORM_data8
:
22563 case DW_FORM_udata
:
22564 case DW_FORM_sdata
:
22565 fprintf_unfiltered (f
, "constant: %s",
22566 pulongest (DW_UNSND (&die
->attrs
[i
])));
22568 case DW_FORM_sec_offset
:
22569 fprintf_unfiltered (f
, "section offset: %s",
22570 pulongest (DW_UNSND (&die
->attrs
[i
])));
22572 case DW_FORM_ref_sig8
:
22573 fprintf_unfiltered (f
, "signature: %s",
22574 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
22576 case DW_FORM_string
:
22578 case DW_FORM_line_strp
:
22579 case DW_FORM_GNU_str_index
:
22580 case DW_FORM_GNU_strp_alt
:
22581 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22582 DW_STRING (&die
->attrs
[i
])
22583 ? DW_STRING (&die
->attrs
[i
]) : "",
22584 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
22587 if (DW_UNSND (&die
->attrs
[i
]))
22588 fprintf_unfiltered (f
, "flag: TRUE");
22590 fprintf_unfiltered (f
, "flag: FALSE");
22592 case DW_FORM_flag_present
:
22593 fprintf_unfiltered (f
, "flag: TRUE");
22595 case DW_FORM_indirect
:
22596 /* The reader will have reduced the indirect form to
22597 the "base form" so this form should not occur. */
22598 fprintf_unfiltered (f
,
22599 "unexpected attribute form: DW_FORM_indirect");
22601 case DW_FORM_implicit_const
:
22602 fprintf_unfiltered (f
, "constant: %s",
22603 plongest (DW_SND (&die
->attrs
[i
])));
22606 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
22607 die
->attrs
[i
].form
);
22610 fprintf_unfiltered (f
, "\n");
22615 dump_die_for_error (struct die_info
*die
)
22617 dump_die_shallow (gdb_stderr
, 0, die
);
22621 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
22623 int indent
= level
* 4;
22625 gdb_assert (die
!= NULL
);
22627 if (level
>= max_level
)
22630 dump_die_shallow (f
, indent
, die
);
22632 if (die
->child
!= NULL
)
22634 print_spaces (indent
, f
);
22635 fprintf_unfiltered (f
, " Children:");
22636 if (level
+ 1 < max_level
)
22638 fprintf_unfiltered (f
, "\n");
22639 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22643 fprintf_unfiltered (f
,
22644 " [not printed, max nesting level reached]\n");
22648 if (die
->sibling
!= NULL
&& level
> 0)
22650 dump_die_1 (f
, level
, max_level
, die
->sibling
);
22654 /* This is called from the pdie macro in gdbinit.in.
22655 It's not static so gcc will keep a copy callable from gdb. */
22658 dump_die (struct die_info
*die
, int max_level
)
22660 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
22664 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
22668 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
22669 to_underlying (die
->sect_off
),
22675 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
22679 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
22681 if (attr_form_is_ref (attr
))
22682 return (sect_offset
) DW_UNSND (attr
);
22684 complaint (&symfile_complaints
,
22685 _("unsupported die ref attribute form: '%s'"),
22686 dwarf_form_name (attr
->form
));
22690 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
22691 * the value held by the attribute is not constant. */
22694 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
22696 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
22697 return DW_SND (attr
);
22698 else if (attr
->form
== DW_FORM_udata
22699 || attr
->form
== DW_FORM_data1
22700 || attr
->form
== DW_FORM_data2
22701 || attr
->form
== DW_FORM_data4
22702 || attr
->form
== DW_FORM_data8
)
22703 return DW_UNSND (attr
);
22706 /* For DW_FORM_data16 see attr_form_is_constant. */
22707 complaint (&symfile_complaints
,
22708 _("Attribute value is not a constant (%s)"),
22709 dwarf_form_name (attr
->form
));
22710 return default_value
;
22714 /* Follow reference or signature attribute ATTR of SRC_DIE.
22715 On entry *REF_CU is the CU of SRC_DIE.
22716 On exit *REF_CU is the CU of the result. */
22718 static struct die_info
*
22719 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22720 struct dwarf2_cu
**ref_cu
)
22722 struct die_info
*die
;
22724 if (attr_form_is_ref (attr
))
22725 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22726 else if (attr
->form
== DW_FORM_ref_sig8
)
22727 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22730 dump_die_for_error (src_die
);
22731 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22732 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22738 /* Follow reference OFFSET.
22739 On entry *REF_CU is the CU of the source die referencing OFFSET.
22740 On exit *REF_CU is the CU of the result.
22741 Returns NULL if OFFSET is invalid. */
22743 static struct die_info
*
22744 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22745 struct dwarf2_cu
**ref_cu
)
22747 struct die_info temp_die
;
22748 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22749 struct dwarf2_per_objfile
*dwarf2_per_objfile
22750 = cu
->per_cu
->dwarf2_per_objfile
;
22752 gdb_assert (cu
->per_cu
!= NULL
);
22756 if (cu
->per_cu
->is_debug_types
)
22758 /* .debug_types CUs cannot reference anything outside their CU.
22759 If they need to, they have to reference a signatured type via
22760 DW_FORM_ref_sig8. */
22761 if (!offset_in_cu_p (&cu
->header
, sect_off
))
22764 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22765 || !offset_in_cu_p (&cu
->header
, sect_off
))
22767 struct dwarf2_per_cu_data
*per_cu
;
22769 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22770 dwarf2_per_objfile
);
22772 /* If necessary, add it to the queue and load its DIEs. */
22773 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
22774 load_full_comp_unit (per_cu
, cu
->language
);
22776 target_cu
= per_cu
->cu
;
22778 else if (cu
->dies
== NULL
)
22780 /* We're loading full DIEs during partial symbol reading. */
22781 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
22782 load_full_comp_unit (cu
->per_cu
, language_minimal
);
22785 *ref_cu
= target_cu
;
22786 temp_die
.sect_off
= sect_off
;
22787 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22789 to_underlying (sect_off
));
22792 /* Follow reference attribute ATTR of SRC_DIE.
22793 On entry *REF_CU is the CU of SRC_DIE.
22794 On exit *REF_CU is the CU of the result. */
22796 static struct die_info
*
22797 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22798 struct dwarf2_cu
**ref_cu
)
22800 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22801 struct dwarf2_cu
*cu
= *ref_cu
;
22802 struct die_info
*die
;
22804 die
= follow_die_offset (sect_off
,
22805 (attr
->form
== DW_FORM_GNU_ref_alt
22806 || cu
->per_cu
->is_dwz
),
22809 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
22810 "at %s [in module %s]"),
22811 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
22812 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
22817 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
22818 Returned value is intended for DW_OP_call*. Returned
22819 dwarf2_locexpr_baton->data has lifetime of
22820 PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */
22822 struct dwarf2_locexpr_baton
22823 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
22824 struct dwarf2_per_cu_data
*per_cu
,
22825 CORE_ADDR (*get_frame_pc
) (void *baton
),
22828 struct dwarf2_cu
*cu
;
22829 struct die_info
*die
;
22830 struct attribute
*attr
;
22831 struct dwarf2_locexpr_baton retval
;
22832 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
22833 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22835 if (per_cu
->cu
== NULL
)
22840 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22841 Instead just throw an error, not much else we can do. */
22842 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22843 sect_offset_str (sect_off
), objfile_name (objfile
));
22846 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22848 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22849 sect_offset_str (sect_off
), objfile_name (objfile
));
22851 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22854 /* DWARF: "If there is no such attribute, then there is no effect.".
22855 DATA is ignored if SIZE is 0. */
22857 retval
.data
= NULL
;
22860 else if (attr_form_is_section_offset (attr
))
22862 struct dwarf2_loclist_baton loclist_baton
;
22863 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22866 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
22868 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
22870 retval
.size
= size
;
22874 if (!attr_form_is_block (attr
))
22875 error (_("Dwarf Error: DIE at %s referenced in module %s "
22876 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
22877 sect_offset_str (sect_off
), objfile_name (objfile
));
22879 retval
.data
= DW_BLOCK (attr
)->data
;
22880 retval
.size
= DW_BLOCK (attr
)->size
;
22882 retval
.per_cu
= cu
->per_cu
;
22884 age_cached_comp_units (dwarf2_per_objfile
);
22889 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
22892 struct dwarf2_locexpr_baton
22893 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
22894 struct dwarf2_per_cu_data
*per_cu
,
22895 CORE_ADDR (*get_frame_pc
) (void *baton
),
22898 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
22900 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
22903 /* Write a constant of a given type as target-ordered bytes into
22906 static const gdb_byte
*
22907 write_constant_as_bytes (struct obstack
*obstack
,
22908 enum bfd_endian byte_order
,
22915 *len
= TYPE_LENGTH (type
);
22916 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22917 store_unsigned_integer (result
, *len
, byte_order
, value
);
22922 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
22923 pointer to the constant bytes and set LEN to the length of the
22924 data. If memory is needed, allocate it on OBSTACK. If the DIE
22925 does not have a DW_AT_const_value, return NULL. */
22928 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
22929 struct dwarf2_per_cu_data
*per_cu
,
22930 struct obstack
*obstack
,
22933 struct dwarf2_cu
*cu
;
22934 struct die_info
*die
;
22935 struct attribute
*attr
;
22936 const gdb_byte
*result
= NULL
;
22939 enum bfd_endian byte_order
;
22940 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
22942 if (per_cu
->cu
== NULL
)
22947 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22948 Instead just throw an error, not much else we can do. */
22949 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22950 sect_offset_str (sect_off
), objfile_name (objfile
));
22953 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22955 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22956 sect_offset_str (sect_off
), objfile_name (objfile
));
22958 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
22962 byte_order
= (bfd_big_endian (objfile
->obfd
)
22963 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
22965 switch (attr
->form
)
22968 case DW_FORM_GNU_addr_index
:
22972 *len
= cu
->header
.addr_size
;
22973 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
22974 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
22978 case DW_FORM_string
:
22980 case DW_FORM_GNU_str_index
:
22981 case DW_FORM_GNU_strp_alt
:
22982 /* DW_STRING is already allocated on the objfile obstack, point
22984 result
= (const gdb_byte
*) DW_STRING (attr
);
22985 *len
= strlen (DW_STRING (attr
));
22987 case DW_FORM_block1
:
22988 case DW_FORM_block2
:
22989 case DW_FORM_block4
:
22990 case DW_FORM_block
:
22991 case DW_FORM_exprloc
:
22992 case DW_FORM_data16
:
22993 result
= DW_BLOCK (attr
)->data
;
22994 *len
= DW_BLOCK (attr
)->size
;
22997 /* The DW_AT_const_value attributes are supposed to carry the
22998 symbol's value "represented as it would be on the target
22999 architecture." By the time we get here, it's already been
23000 converted to host endianness, so we just need to sign- or
23001 zero-extend it as appropriate. */
23002 case DW_FORM_data1
:
23003 type
= die_type (die
, cu
);
23004 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
23005 if (result
== NULL
)
23006 result
= write_constant_as_bytes (obstack
, byte_order
,
23009 case DW_FORM_data2
:
23010 type
= die_type (die
, cu
);
23011 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
23012 if (result
== NULL
)
23013 result
= write_constant_as_bytes (obstack
, byte_order
,
23016 case DW_FORM_data4
:
23017 type
= die_type (die
, cu
);
23018 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
23019 if (result
== NULL
)
23020 result
= write_constant_as_bytes (obstack
, byte_order
,
23023 case DW_FORM_data8
:
23024 type
= die_type (die
, cu
);
23025 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
23026 if (result
== NULL
)
23027 result
= write_constant_as_bytes (obstack
, byte_order
,
23031 case DW_FORM_sdata
:
23032 case DW_FORM_implicit_const
:
23033 type
= die_type (die
, cu
);
23034 result
= write_constant_as_bytes (obstack
, byte_order
,
23035 type
, DW_SND (attr
), len
);
23038 case DW_FORM_udata
:
23039 type
= die_type (die
, cu
);
23040 result
= write_constant_as_bytes (obstack
, byte_order
,
23041 type
, DW_UNSND (attr
), len
);
23045 complaint (&symfile_complaints
,
23046 _("unsupported const value attribute form: '%s'"),
23047 dwarf_form_name (attr
->form
));
23054 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
23055 valid type for this die is found. */
23058 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
23059 struct dwarf2_per_cu_data
*per_cu
)
23061 struct dwarf2_cu
*cu
;
23062 struct die_info
*die
;
23064 if (per_cu
->cu
== NULL
)
23070 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23074 return die_type (die
, cu
);
23077 /* Return the type of the DIE at DIE_OFFSET in the CU named by
23081 dwarf2_get_die_type (cu_offset die_offset
,
23082 struct dwarf2_per_cu_data
*per_cu
)
23084 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
23085 return get_die_type_at_offset (die_offset_sect
, per_cu
);
23088 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
23089 On entry *REF_CU is the CU of SRC_DIE.
23090 On exit *REF_CU is the CU of the result.
23091 Returns NULL if the referenced DIE isn't found. */
23093 static struct die_info
*
23094 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
23095 struct dwarf2_cu
**ref_cu
)
23097 struct die_info temp_die
;
23098 struct dwarf2_cu
*sig_cu
;
23099 struct die_info
*die
;
23101 /* While it might be nice to assert sig_type->type == NULL here,
23102 we can get here for DW_AT_imported_declaration where we need
23103 the DIE not the type. */
23105 /* If necessary, add it to the queue and load its DIEs. */
23107 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
23108 read_signatured_type (sig_type
);
23110 sig_cu
= sig_type
->per_cu
.cu
;
23111 gdb_assert (sig_cu
!= NULL
);
23112 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
23113 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
23114 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
23115 to_underlying (temp_die
.sect_off
));
23118 struct dwarf2_per_objfile
*dwarf2_per_objfile
23119 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
23121 /* For .gdb_index version 7 keep track of included TUs.
23122 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
23123 if (dwarf2_per_objfile
->index_table
!= NULL
23124 && dwarf2_per_objfile
->index_table
->version
<= 7)
23126 VEC_safe_push (dwarf2_per_cu_ptr
,
23127 (*ref_cu
)->per_cu
->imported_symtabs
,
23138 /* Follow signatured type referenced by ATTR in SRC_DIE.
23139 On entry *REF_CU is the CU of SRC_DIE.
23140 On exit *REF_CU is the CU of the result.
23141 The result is the DIE of the type.
23142 If the referenced type cannot be found an error is thrown. */
23144 static struct die_info
*
23145 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23146 struct dwarf2_cu
**ref_cu
)
23148 ULONGEST signature
= DW_SIGNATURE (attr
);
23149 struct signatured_type
*sig_type
;
23150 struct die_info
*die
;
23152 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
23154 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
23155 /* sig_type will be NULL if the signatured type is missing from
23157 if (sig_type
== NULL
)
23159 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23160 " from DIE at %s [in module %s]"),
23161 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23162 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23165 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
23168 dump_die_for_error (src_die
);
23169 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23170 " from DIE at %s [in module %s]"),
23171 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23172 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23178 /* Get the type specified by SIGNATURE referenced in DIE/CU,
23179 reading in and processing the type unit if necessary. */
23181 static struct type
*
23182 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
23183 struct dwarf2_cu
*cu
)
23185 struct dwarf2_per_objfile
*dwarf2_per_objfile
23186 = cu
->per_cu
->dwarf2_per_objfile
;
23187 struct signatured_type
*sig_type
;
23188 struct dwarf2_cu
*type_cu
;
23189 struct die_info
*type_die
;
23192 sig_type
= lookup_signatured_type (cu
, signature
);
23193 /* sig_type will be NULL if the signatured type is missing from
23195 if (sig_type
== NULL
)
23197 complaint (&symfile_complaints
,
23198 _("Dwarf Error: Cannot find signatured DIE %s referenced"
23199 " from DIE at %s [in module %s]"),
23200 hex_string (signature
), sect_offset_str (die
->sect_off
),
23201 objfile_name (dwarf2_per_objfile
->objfile
));
23202 return build_error_marker_type (cu
, die
);
23205 /* If we already know the type we're done. */
23206 if (sig_type
->type
!= NULL
)
23207 return sig_type
->type
;
23210 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
23211 if (type_die
!= NULL
)
23213 /* N.B. We need to call get_die_type to ensure only one type for this DIE
23214 is created. This is important, for example, because for c++ classes
23215 we need TYPE_NAME set which is only done by new_symbol. Blech. */
23216 type
= read_type_die (type_die
, type_cu
);
23219 complaint (&symfile_complaints
,
23220 _("Dwarf Error: Cannot build signatured type %s"
23221 " referenced from DIE at %s [in module %s]"),
23222 hex_string (signature
), sect_offset_str (die
->sect_off
),
23223 objfile_name (dwarf2_per_objfile
->objfile
));
23224 type
= build_error_marker_type (cu
, die
);
23229 complaint (&symfile_complaints
,
23230 _("Dwarf Error: Problem reading signatured DIE %s referenced"
23231 " from DIE at %s [in module %s]"),
23232 hex_string (signature
), sect_offset_str (die
->sect_off
),
23233 objfile_name (dwarf2_per_objfile
->objfile
));
23234 type
= build_error_marker_type (cu
, die
);
23236 sig_type
->type
= type
;
23241 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
23242 reading in and processing the type unit if necessary. */
23244 static struct type
*
23245 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
23246 struct dwarf2_cu
*cu
) /* ARI: editCase function */
23248 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
23249 if (attr_form_is_ref (attr
))
23251 struct dwarf2_cu
*type_cu
= cu
;
23252 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
23254 return read_type_die (type_die
, type_cu
);
23256 else if (attr
->form
== DW_FORM_ref_sig8
)
23258 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
23262 struct dwarf2_per_objfile
*dwarf2_per_objfile
23263 = cu
->per_cu
->dwarf2_per_objfile
;
23265 complaint (&symfile_complaints
,
23266 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
23267 " at %s [in module %s]"),
23268 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
23269 objfile_name (dwarf2_per_objfile
->objfile
));
23270 return build_error_marker_type (cu
, die
);
23274 /* Load the DIEs associated with type unit PER_CU into memory. */
23277 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
23279 struct signatured_type
*sig_type
;
23281 /* Caller is responsible for ensuring type_unit_groups don't get here. */
23282 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
23284 /* We have the per_cu, but we need the signatured_type.
23285 Fortunately this is an easy translation. */
23286 gdb_assert (per_cu
->is_debug_types
);
23287 sig_type
= (struct signatured_type
*) per_cu
;
23289 gdb_assert (per_cu
->cu
== NULL
);
23291 read_signatured_type (sig_type
);
23293 gdb_assert (per_cu
->cu
!= NULL
);
23296 /* die_reader_func for read_signatured_type.
23297 This is identical to load_full_comp_unit_reader,
23298 but is kept separate for now. */
23301 read_signatured_type_reader (const struct die_reader_specs
*reader
,
23302 const gdb_byte
*info_ptr
,
23303 struct die_info
*comp_unit_die
,
23307 struct dwarf2_cu
*cu
= reader
->cu
;
23309 gdb_assert (cu
->die_hash
== NULL
);
23311 htab_create_alloc_ex (cu
->header
.length
/ 12,
23315 &cu
->comp_unit_obstack
,
23316 hashtab_obstack_allocate
,
23317 dummy_obstack_deallocate
);
23320 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
23321 &info_ptr
, comp_unit_die
);
23322 cu
->dies
= comp_unit_die
;
23323 /* comp_unit_die is not stored in die_hash, no need. */
23325 /* We try not to read any attributes in this function, because not
23326 all CUs needed for references have been loaded yet, and symbol
23327 table processing isn't initialized. But we have to set the CU language,
23328 or we won't be able to build types correctly.
23329 Similarly, if we do not read the producer, we can not apply
23330 producer-specific interpretation. */
23331 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
23334 /* Read in a signatured type and build its CU and DIEs.
23335 If the type is a stub for the real type in a DWO file,
23336 read in the real type from the DWO file as well. */
23339 read_signatured_type (struct signatured_type
*sig_type
)
23341 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
23343 gdb_assert (per_cu
->is_debug_types
);
23344 gdb_assert (per_cu
->cu
== NULL
);
23346 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
23347 read_signatured_type_reader
, NULL
);
23348 sig_type
->per_cu
.tu_read
= 1;
23351 /* Decode simple location descriptions.
23352 Given a pointer to a dwarf block that defines a location, compute
23353 the location and return the value.
23355 NOTE drow/2003-11-18: This function is called in two situations
23356 now: for the address of static or global variables (partial symbols
23357 only) and for offsets into structures which are expected to be
23358 (more or less) constant. The partial symbol case should go away,
23359 and only the constant case should remain. That will let this
23360 function complain more accurately. A few special modes are allowed
23361 without complaint for global variables (for instance, global
23362 register values and thread-local values).
23364 A location description containing no operations indicates that the
23365 object is optimized out. The return value is 0 for that case.
23366 FIXME drow/2003-11-16: No callers check for this case any more; soon all
23367 callers will only want a very basic result and this can become a
23370 Note that stack[0] is unused except as a default error return. */
23373 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
23375 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
23377 size_t size
= blk
->size
;
23378 const gdb_byte
*data
= blk
->data
;
23379 CORE_ADDR stack
[64];
23381 unsigned int bytes_read
, unsnd
;
23387 stack
[++stacki
] = 0;
23426 stack
[++stacki
] = op
- DW_OP_lit0
;
23461 stack
[++stacki
] = op
- DW_OP_reg0
;
23463 dwarf2_complex_location_expr_complaint ();
23467 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
23469 stack
[++stacki
] = unsnd
;
23471 dwarf2_complex_location_expr_complaint ();
23475 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
23480 case DW_OP_const1u
:
23481 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
23485 case DW_OP_const1s
:
23486 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
23490 case DW_OP_const2u
:
23491 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
23495 case DW_OP_const2s
:
23496 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
23500 case DW_OP_const4u
:
23501 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
23505 case DW_OP_const4s
:
23506 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
23510 case DW_OP_const8u
:
23511 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
23516 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
23522 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
23527 stack
[stacki
+ 1] = stack
[stacki
];
23532 stack
[stacki
- 1] += stack
[stacki
];
23536 case DW_OP_plus_uconst
:
23537 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
23543 stack
[stacki
- 1] -= stack
[stacki
];
23548 /* If we're not the last op, then we definitely can't encode
23549 this using GDB's address_class enum. This is valid for partial
23550 global symbols, although the variable's address will be bogus
23553 dwarf2_complex_location_expr_complaint ();
23556 case DW_OP_GNU_push_tls_address
:
23557 case DW_OP_form_tls_address
:
23558 /* The top of the stack has the offset from the beginning
23559 of the thread control block at which the variable is located. */
23560 /* Nothing should follow this operator, so the top of stack would
23562 /* This is valid for partial global symbols, but the variable's
23563 address will be bogus in the psymtab. Make it always at least
23564 non-zero to not look as a variable garbage collected by linker
23565 which have DW_OP_addr 0. */
23567 dwarf2_complex_location_expr_complaint ();
23571 case DW_OP_GNU_uninit
:
23574 case DW_OP_GNU_addr_index
:
23575 case DW_OP_GNU_const_index
:
23576 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
23583 const char *name
= get_DW_OP_name (op
);
23586 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
23589 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
23593 return (stack
[stacki
]);
23596 /* Enforce maximum stack depth of SIZE-1 to avoid writing
23597 outside of the allocated space. Also enforce minimum>0. */
23598 if (stacki
>= ARRAY_SIZE (stack
) - 1)
23600 complaint (&symfile_complaints
,
23601 _("location description stack overflow"));
23607 complaint (&symfile_complaints
,
23608 _("location description stack underflow"));
23612 return (stack
[stacki
]);
23615 /* memory allocation interface */
23617 static struct dwarf_block
*
23618 dwarf_alloc_block (struct dwarf2_cu
*cu
)
23620 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
23623 static struct die_info
*
23624 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
23626 struct die_info
*die
;
23627 size_t size
= sizeof (struct die_info
);
23630 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
23632 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
23633 memset (die
, 0, sizeof (struct die_info
));
23638 /* Macro support. */
23640 /* Return file name relative to the compilation directory of file number I in
23641 *LH's file name table. The result is allocated using xmalloc; the caller is
23642 responsible for freeing it. */
23645 file_file_name (int file
, struct line_header
*lh
)
23647 /* Is the file number a valid index into the line header's file name
23648 table? Remember that file numbers start with one, not zero. */
23649 if (1 <= file
&& file
<= lh
->file_names
.size ())
23651 const file_entry
&fe
= lh
->file_names
[file
- 1];
23653 if (!IS_ABSOLUTE_PATH (fe
.name
))
23655 const char *dir
= fe
.include_dir (lh
);
23657 return concat (dir
, SLASH_STRING
, fe
.name
, (char *) NULL
);
23659 return xstrdup (fe
.name
);
23663 /* The compiler produced a bogus file number. We can at least
23664 record the macro definitions made in the file, even if we
23665 won't be able to find the file by name. */
23666 char fake_name
[80];
23668 xsnprintf (fake_name
, sizeof (fake_name
),
23669 "<bad macro file number %d>", file
);
23671 complaint (&symfile_complaints
,
23672 _("bad file number in macro information (%d)"),
23675 return xstrdup (fake_name
);
23679 /* Return the full name of file number I in *LH's file name table.
23680 Use COMP_DIR as the name of the current directory of the
23681 compilation. The result is allocated using xmalloc; the caller is
23682 responsible for freeing it. */
23684 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
23686 /* Is the file number a valid index into the line header's file name
23687 table? Remember that file numbers start with one, not zero. */
23688 if (1 <= file
&& file
<= lh
->file_names
.size ())
23690 char *relative
= file_file_name (file
, lh
);
23692 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
23694 return reconcat (relative
, comp_dir
, SLASH_STRING
,
23695 relative
, (char *) NULL
);
23698 return file_file_name (file
, lh
);
23702 static struct macro_source_file
*
23703 macro_start_file (int file
, int line
,
23704 struct macro_source_file
*current_file
,
23705 struct line_header
*lh
)
23707 /* File name relative to the compilation directory of this source file. */
23708 char *file_name
= file_file_name (file
, lh
);
23710 if (! current_file
)
23712 /* Note: We don't create a macro table for this compilation unit
23713 at all until we actually get a filename. */
23714 struct macro_table
*macro_table
= get_macro_table ();
23716 /* If we have no current file, then this must be the start_file
23717 directive for the compilation unit's main source file. */
23718 current_file
= macro_set_main (macro_table
, file_name
);
23719 macro_define_special (macro_table
);
23722 current_file
= macro_include (current_file
, line
, file_name
);
23726 return current_file
;
23729 static const char *
23730 consume_improper_spaces (const char *p
, const char *body
)
23734 complaint (&symfile_complaints
,
23735 _("macro definition contains spaces "
23736 "in formal argument list:\n`%s'"),
23748 parse_macro_definition (struct macro_source_file
*file
, int line
,
23753 /* The body string takes one of two forms. For object-like macro
23754 definitions, it should be:
23756 <macro name> " " <definition>
23758 For function-like macro definitions, it should be:
23760 <macro name> "() " <definition>
23762 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
23764 Spaces may appear only where explicitly indicated, and in the
23767 The Dwarf 2 spec says that an object-like macro's name is always
23768 followed by a space, but versions of GCC around March 2002 omit
23769 the space when the macro's definition is the empty string.
23771 The Dwarf 2 spec says that there should be no spaces between the
23772 formal arguments in a function-like macro's formal argument list,
23773 but versions of GCC around March 2002 include spaces after the
23777 /* Find the extent of the macro name. The macro name is terminated
23778 by either a space or null character (for an object-like macro) or
23779 an opening paren (for a function-like macro). */
23780 for (p
= body
; *p
; p
++)
23781 if (*p
== ' ' || *p
== '(')
23784 if (*p
== ' ' || *p
== '\0')
23786 /* It's an object-like macro. */
23787 int name_len
= p
- body
;
23788 char *name
= savestring (body
, name_len
);
23789 const char *replacement
;
23792 replacement
= body
+ name_len
+ 1;
23795 dwarf2_macro_malformed_definition_complaint (body
);
23796 replacement
= body
+ name_len
;
23799 macro_define_object (file
, line
, name
, replacement
);
23803 else if (*p
== '(')
23805 /* It's a function-like macro. */
23806 char *name
= savestring (body
, p
- body
);
23809 char **argv
= XNEWVEC (char *, argv_size
);
23813 p
= consume_improper_spaces (p
, body
);
23815 /* Parse the formal argument list. */
23816 while (*p
&& *p
!= ')')
23818 /* Find the extent of the current argument name. */
23819 const char *arg_start
= p
;
23821 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
23824 if (! *p
|| p
== arg_start
)
23825 dwarf2_macro_malformed_definition_complaint (body
);
23828 /* Make sure argv has room for the new argument. */
23829 if (argc
>= argv_size
)
23832 argv
= XRESIZEVEC (char *, argv
, argv_size
);
23835 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
23838 p
= consume_improper_spaces (p
, body
);
23840 /* Consume the comma, if present. */
23845 p
= consume_improper_spaces (p
, body
);
23854 /* Perfectly formed definition, no complaints. */
23855 macro_define_function (file
, line
, name
,
23856 argc
, (const char **) argv
,
23858 else if (*p
== '\0')
23860 /* Complain, but do define it. */
23861 dwarf2_macro_malformed_definition_complaint (body
);
23862 macro_define_function (file
, line
, name
,
23863 argc
, (const char **) argv
,
23867 /* Just complain. */
23868 dwarf2_macro_malformed_definition_complaint (body
);
23871 /* Just complain. */
23872 dwarf2_macro_malformed_definition_complaint (body
);
23878 for (i
= 0; i
< argc
; i
++)
23884 dwarf2_macro_malformed_definition_complaint (body
);
23887 /* Skip some bytes from BYTES according to the form given in FORM.
23888 Returns the new pointer. */
23890 static const gdb_byte
*
23891 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
23892 enum dwarf_form form
,
23893 unsigned int offset_size
,
23894 struct dwarf2_section_info
*section
)
23896 unsigned int bytes_read
;
23900 case DW_FORM_data1
:
23905 case DW_FORM_data2
:
23909 case DW_FORM_data4
:
23913 case DW_FORM_data8
:
23917 case DW_FORM_data16
:
23921 case DW_FORM_string
:
23922 read_direct_string (abfd
, bytes
, &bytes_read
);
23923 bytes
+= bytes_read
;
23926 case DW_FORM_sec_offset
:
23928 case DW_FORM_GNU_strp_alt
:
23929 bytes
+= offset_size
;
23932 case DW_FORM_block
:
23933 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
23934 bytes
+= bytes_read
;
23937 case DW_FORM_block1
:
23938 bytes
+= 1 + read_1_byte (abfd
, bytes
);
23940 case DW_FORM_block2
:
23941 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
23943 case DW_FORM_block4
:
23944 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
23947 case DW_FORM_sdata
:
23948 case DW_FORM_udata
:
23949 case DW_FORM_GNU_addr_index
:
23950 case DW_FORM_GNU_str_index
:
23951 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
23954 dwarf2_section_buffer_overflow_complaint (section
);
23959 case DW_FORM_implicit_const
:
23964 complaint (&symfile_complaints
,
23965 _("invalid form 0x%x in `%s'"),
23966 form
, get_section_name (section
));
23974 /* A helper for dwarf_decode_macros that handles skipping an unknown
23975 opcode. Returns an updated pointer to the macro data buffer; or,
23976 on error, issues a complaint and returns NULL. */
23978 static const gdb_byte
*
23979 skip_unknown_opcode (unsigned int opcode
,
23980 const gdb_byte
**opcode_definitions
,
23981 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
23983 unsigned int offset_size
,
23984 struct dwarf2_section_info
*section
)
23986 unsigned int bytes_read
, i
;
23988 const gdb_byte
*defn
;
23990 if (opcode_definitions
[opcode
] == NULL
)
23992 complaint (&symfile_complaints
,
23993 _("unrecognized DW_MACFINO opcode 0x%x"),
23998 defn
= opcode_definitions
[opcode
];
23999 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
24000 defn
+= bytes_read
;
24002 for (i
= 0; i
< arg
; ++i
)
24004 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
24005 (enum dwarf_form
) defn
[i
], offset_size
,
24007 if (mac_ptr
== NULL
)
24009 /* skip_form_bytes already issued the complaint. */
24017 /* A helper function which parses the header of a macro section.
24018 If the macro section is the extended (for now called "GNU") type,
24019 then this updates *OFFSET_SIZE. Returns a pointer to just after
24020 the header, or issues a complaint and returns NULL on error. */
24022 static const gdb_byte
*
24023 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
24025 const gdb_byte
*mac_ptr
,
24026 unsigned int *offset_size
,
24027 int section_is_gnu
)
24029 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
24031 if (section_is_gnu
)
24033 unsigned int version
, flags
;
24035 version
= read_2_bytes (abfd
, mac_ptr
);
24036 if (version
!= 4 && version
!= 5)
24038 complaint (&symfile_complaints
,
24039 _("unrecognized version `%d' in .debug_macro section"),
24045 flags
= read_1_byte (abfd
, mac_ptr
);
24047 *offset_size
= (flags
& 1) ? 8 : 4;
24049 if ((flags
& 2) != 0)
24050 /* We don't need the line table offset. */
24051 mac_ptr
+= *offset_size
;
24053 /* Vendor opcode descriptions. */
24054 if ((flags
& 4) != 0)
24056 unsigned int i
, count
;
24058 count
= read_1_byte (abfd
, mac_ptr
);
24060 for (i
= 0; i
< count
; ++i
)
24062 unsigned int opcode
, bytes_read
;
24065 opcode
= read_1_byte (abfd
, mac_ptr
);
24067 opcode_definitions
[opcode
] = mac_ptr
;
24068 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24069 mac_ptr
+= bytes_read
;
24078 /* A helper for dwarf_decode_macros that handles the GNU extensions,
24079 including DW_MACRO_import. */
24082 dwarf_decode_macro_bytes (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
24084 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24085 struct macro_source_file
*current_file
,
24086 struct line_header
*lh
,
24087 struct dwarf2_section_info
*section
,
24088 int section_is_gnu
, int section_is_dwz
,
24089 unsigned int offset_size
,
24090 htab_t include_hash
)
24092 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24093 enum dwarf_macro_record_type macinfo_type
;
24094 int at_commandline
;
24095 const gdb_byte
*opcode_definitions
[256];
24097 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24098 &offset_size
, section_is_gnu
);
24099 if (mac_ptr
== NULL
)
24101 /* We already issued a complaint. */
24105 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
24106 GDB is still reading the definitions from command line. First
24107 DW_MACINFO_start_file will need to be ignored as it was already executed
24108 to create CURRENT_FILE for the main source holding also the command line
24109 definitions. On first met DW_MACINFO_start_file this flag is reset to
24110 normally execute all the remaining DW_MACINFO_start_file macinfos. */
24112 at_commandline
= 1;
24116 /* Do we at least have room for a macinfo type byte? */
24117 if (mac_ptr
>= mac_end
)
24119 dwarf2_section_buffer_overflow_complaint (section
);
24123 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24126 /* Note that we rely on the fact that the corresponding GNU and
24127 DWARF constants are the same. */
24129 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24130 switch (macinfo_type
)
24132 /* A zero macinfo type indicates the end of the macro
24137 case DW_MACRO_define
:
24138 case DW_MACRO_undef
:
24139 case DW_MACRO_define_strp
:
24140 case DW_MACRO_undef_strp
:
24141 case DW_MACRO_define_sup
:
24142 case DW_MACRO_undef_sup
:
24144 unsigned int bytes_read
;
24149 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24150 mac_ptr
+= bytes_read
;
24152 if (macinfo_type
== DW_MACRO_define
24153 || macinfo_type
== DW_MACRO_undef
)
24155 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24156 mac_ptr
+= bytes_read
;
24160 LONGEST str_offset
;
24162 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24163 mac_ptr
+= offset_size
;
24165 if (macinfo_type
== DW_MACRO_define_sup
24166 || macinfo_type
== DW_MACRO_undef_sup
24169 struct dwz_file
*dwz
24170 = dwarf2_get_dwz_file (dwarf2_per_objfile
);
24172 body
= read_indirect_string_from_dwz (objfile
,
24176 body
= read_indirect_string_at_offset (dwarf2_per_objfile
,
24180 is_define
= (macinfo_type
== DW_MACRO_define
24181 || macinfo_type
== DW_MACRO_define_strp
24182 || macinfo_type
== DW_MACRO_define_sup
);
24183 if (! current_file
)
24185 /* DWARF violation as no main source is present. */
24186 complaint (&symfile_complaints
,
24187 _("debug info with no main source gives macro %s "
24189 is_define
? _("definition") : _("undefinition"),
24193 if ((line
== 0 && !at_commandline
)
24194 || (line
!= 0 && at_commandline
))
24195 complaint (&symfile_complaints
,
24196 _("debug info gives %s macro %s with %s line %d: %s"),
24197 at_commandline
? _("command-line") : _("in-file"),
24198 is_define
? _("definition") : _("undefinition"),
24199 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
24202 parse_macro_definition (current_file
, line
, body
);
24205 gdb_assert (macinfo_type
== DW_MACRO_undef
24206 || macinfo_type
== DW_MACRO_undef_strp
24207 || macinfo_type
== DW_MACRO_undef_sup
);
24208 macro_undef (current_file
, line
, body
);
24213 case DW_MACRO_start_file
:
24215 unsigned int bytes_read
;
24218 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24219 mac_ptr
+= bytes_read
;
24220 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24221 mac_ptr
+= bytes_read
;
24223 if ((line
== 0 && !at_commandline
)
24224 || (line
!= 0 && at_commandline
))
24225 complaint (&symfile_complaints
,
24226 _("debug info gives source %d included "
24227 "from %s at %s line %d"),
24228 file
, at_commandline
? _("command-line") : _("file"),
24229 line
== 0 ? _("zero") : _("non-zero"), line
);
24231 if (at_commandline
)
24233 /* This DW_MACRO_start_file was executed in the
24235 at_commandline
= 0;
24238 current_file
= macro_start_file (file
, line
, current_file
, lh
);
24242 case DW_MACRO_end_file
:
24243 if (! current_file
)
24244 complaint (&symfile_complaints
,
24245 _("macro debug info has an unmatched "
24246 "`close_file' directive"));
24249 current_file
= current_file
->included_by
;
24250 if (! current_file
)
24252 enum dwarf_macro_record_type next_type
;
24254 /* GCC circa March 2002 doesn't produce the zero
24255 type byte marking the end of the compilation
24256 unit. Complain if it's not there, but exit no
24259 /* Do we at least have room for a macinfo type byte? */
24260 if (mac_ptr
>= mac_end
)
24262 dwarf2_section_buffer_overflow_complaint (section
);
24266 /* We don't increment mac_ptr here, so this is just
24269 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
24271 if (next_type
!= 0)
24272 complaint (&symfile_complaints
,
24273 _("no terminating 0-type entry for "
24274 "macros in `.debug_macinfo' section"));
24281 case DW_MACRO_import
:
24282 case DW_MACRO_import_sup
:
24286 bfd
*include_bfd
= abfd
;
24287 struct dwarf2_section_info
*include_section
= section
;
24288 const gdb_byte
*include_mac_end
= mac_end
;
24289 int is_dwz
= section_is_dwz
;
24290 const gdb_byte
*new_mac_ptr
;
24292 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24293 mac_ptr
+= offset_size
;
24295 if (macinfo_type
== DW_MACRO_import_sup
)
24297 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
24299 dwarf2_read_section (objfile
, &dwz
->macro
);
24301 include_section
= &dwz
->macro
;
24302 include_bfd
= get_section_bfd_owner (include_section
);
24303 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
24307 new_mac_ptr
= include_section
->buffer
+ offset
;
24308 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
24312 /* This has actually happened; see
24313 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
24314 complaint (&symfile_complaints
,
24315 _("recursive DW_MACRO_import in "
24316 ".debug_macro section"));
24320 *slot
= (void *) new_mac_ptr
;
24322 dwarf_decode_macro_bytes (dwarf2_per_objfile
,
24323 include_bfd
, new_mac_ptr
,
24324 include_mac_end
, current_file
, lh
,
24325 section
, section_is_gnu
, is_dwz
,
24326 offset_size
, include_hash
);
24328 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
24333 case DW_MACINFO_vendor_ext
:
24334 if (!section_is_gnu
)
24336 unsigned int bytes_read
;
24338 /* This reads the constant, but since we don't recognize
24339 any vendor extensions, we ignore it. */
24340 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24341 mac_ptr
+= bytes_read
;
24342 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24343 mac_ptr
+= bytes_read
;
24345 /* We don't recognize any vendor extensions. */
24351 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24352 mac_ptr
, mac_end
, abfd
, offset_size
,
24354 if (mac_ptr
== NULL
)
24359 } while (macinfo_type
!= 0);
24363 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
24364 int section_is_gnu
)
24366 struct dwarf2_per_objfile
*dwarf2_per_objfile
24367 = cu
->per_cu
->dwarf2_per_objfile
;
24368 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24369 struct line_header
*lh
= cu
->line_header
;
24371 const gdb_byte
*mac_ptr
, *mac_end
;
24372 struct macro_source_file
*current_file
= 0;
24373 enum dwarf_macro_record_type macinfo_type
;
24374 unsigned int offset_size
= cu
->header
.offset_size
;
24375 const gdb_byte
*opcode_definitions
[256];
24377 struct dwarf2_section_info
*section
;
24378 const char *section_name
;
24380 if (cu
->dwo_unit
!= NULL
)
24382 if (section_is_gnu
)
24384 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
24385 section_name
= ".debug_macro.dwo";
24389 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
24390 section_name
= ".debug_macinfo.dwo";
24395 if (section_is_gnu
)
24397 section
= &dwarf2_per_objfile
->macro
;
24398 section_name
= ".debug_macro";
24402 section
= &dwarf2_per_objfile
->macinfo
;
24403 section_name
= ".debug_macinfo";
24407 dwarf2_read_section (objfile
, section
);
24408 if (section
->buffer
== NULL
)
24410 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
24413 abfd
= get_section_bfd_owner (section
);
24415 /* First pass: Find the name of the base filename.
24416 This filename is needed in order to process all macros whose definition
24417 (or undefinition) comes from the command line. These macros are defined
24418 before the first DW_MACINFO_start_file entry, and yet still need to be
24419 associated to the base file.
24421 To determine the base file name, we scan the macro definitions until we
24422 reach the first DW_MACINFO_start_file entry. We then initialize
24423 CURRENT_FILE accordingly so that any macro definition found before the
24424 first DW_MACINFO_start_file can still be associated to the base file. */
24426 mac_ptr
= section
->buffer
+ offset
;
24427 mac_end
= section
->buffer
+ section
->size
;
24429 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24430 &offset_size
, section_is_gnu
);
24431 if (mac_ptr
== NULL
)
24433 /* We already issued a complaint. */
24439 /* Do we at least have room for a macinfo type byte? */
24440 if (mac_ptr
>= mac_end
)
24442 /* Complaint is printed during the second pass as GDB will probably
24443 stop the first pass earlier upon finding
24444 DW_MACINFO_start_file. */
24448 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24451 /* Note that we rely on the fact that the corresponding GNU and
24452 DWARF constants are the same. */
24454 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24455 switch (macinfo_type
)
24457 /* A zero macinfo type indicates the end of the macro
24462 case DW_MACRO_define
:
24463 case DW_MACRO_undef
:
24464 /* Only skip the data by MAC_PTR. */
24466 unsigned int bytes_read
;
24468 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24469 mac_ptr
+= bytes_read
;
24470 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24471 mac_ptr
+= bytes_read
;
24475 case DW_MACRO_start_file
:
24477 unsigned int bytes_read
;
24480 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24481 mac_ptr
+= bytes_read
;
24482 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24483 mac_ptr
+= bytes_read
;
24485 current_file
= macro_start_file (file
, line
, current_file
, lh
);
24489 case DW_MACRO_end_file
:
24490 /* No data to skip by MAC_PTR. */
24493 case DW_MACRO_define_strp
:
24494 case DW_MACRO_undef_strp
:
24495 case DW_MACRO_define_sup
:
24496 case DW_MACRO_undef_sup
:
24498 unsigned int bytes_read
;
24500 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24501 mac_ptr
+= bytes_read
;
24502 mac_ptr
+= offset_size
;
24506 case DW_MACRO_import
:
24507 case DW_MACRO_import_sup
:
24508 /* Note that, according to the spec, a transparent include
24509 chain cannot call DW_MACRO_start_file. So, we can just
24510 skip this opcode. */
24511 mac_ptr
+= offset_size
;
24514 case DW_MACINFO_vendor_ext
:
24515 /* Only skip the data by MAC_PTR. */
24516 if (!section_is_gnu
)
24518 unsigned int bytes_read
;
24520 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24521 mac_ptr
+= bytes_read
;
24522 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24523 mac_ptr
+= bytes_read
;
24528 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24529 mac_ptr
, mac_end
, abfd
, offset_size
,
24531 if (mac_ptr
== NULL
)
24536 } while (macinfo_type
!= 0 && current_file
== NULL
);
24538 /* Second pass: Process all entries.
24540 Use the AT_COMMAND_LINE flag to determine whether we are still processing
24541 command-line macro definitions/undefinitions. This flag is unset when we
24542 reach the first DW_MACINFO_start_file entry. */
24544 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
24546 NULL
, xcalloc
, xfree
));
24547 mac_ptr
= section
->buffer
+ offset
;
24548 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
24549 *slot
= (void *) mac_ptr
;
24550 dwarf_decode_macro_bytes (dwarf2_per_objfile
,
24551 abfd
, mac_ptr
, mac_end
,
24552 current_file
, lh
, section
,
24553 section_is_gnu
, 0, offset_size
,
24554 include_hash
.get ());
24557 /* Check if the attribute's form is a DW_FORM_block*
24558 if so return true else false. */
24561 attr_form_is_block (const struct attribute
*attr
)
24563 return (attr
== NULL
? 0 :
24564 attr
->form
== DW_FORM_block1
24565 || attr
->form
== DW_FORM_block2
24566 || attr
->form
== DW_FORM_block4
24567 || attr
->form
== DW_FORM_block
24568 || attr
->form
== DW_FORM_exprloc
);
24571 /* Return non-zero if ATTR's value is a section offset --- classes
24572 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
24573 You may use DW_UNSND (attr) to retrieve such offsets.
24575 Section 7.5.4, "Attribute Encodings", explains that no attribute
24576 may have a value that belongs to more than one of these classes; it
24577 would be ambiguous if we did, because we use the same forms for all
24581 attr_form_is_section_offset (const struct attribute
*attr
)
24583 return (attr
->form
== DW_FORM_data4
24584 || attr
->form
== DW_FORM_data8
24585 || attr
->form
== DW_FORM_sec_offset
);
24588 /* Return non-zero if ATTR's value falls in the 'constant' class, or
24589 zero otherwise. When this function returns true, you can apply
24590 dwarf2_get_attr_constant_value to it.
24592 However, note that for some attributes you must check
24593 attr_form_is_section_offset before using this test. DW_FORM_data4
24594 and DW_FORM_data8 are members of both the constant class, and of
24595 the classes that contain offsets into other debug sections
24596 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
24597 that, if an attribute's can be either a constant or one of the
24598 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
24599 taken as section offsets, not constants.
24601 DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
24602 cannot handle that. */
24605 attr_form_is_constant (const struct attribute
*attr
)
24607 switch (attr
->form
)
24609 case DW_FORM_sdata
:
24610 case DW_FORM_udata
:
24611 case DW_FORM_data1
:
24612 case DW_FORM_data2
:
24613 case DW_FORM_data4
:
24614 case DW_FORM_data8
:
24615 case DW_FORM_implicit_const
:
24623 /* DW_ADDR is always stored already as sect_offset; despite for the forms
24624 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
24627 attr_form_is_ref (const struct attribute
*attr
)
24629 switch (attr
->form
)
24631 case DW_FORM_ref_addr
:
24636 case DW_FORM_ref_udata
:
24637 case DW_FORM_GNU_ref_alt
:
24644 /* Return the .debug_loc section to use for CU.
24645 For DWO files use .debug_loc.dwo. */
24647 static struct dwarf2_section_info
*
24648 cu_debug_loc_section (struct dwarf2_cu
*cu
)
24650 struct dwarf2_per_objfile
*dwarf2_per_objfile
24651 = cu
->per_cu
->dwarf2_per_objfile
;
24655 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
24657 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
24659 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
24660 : &dwarf2_per_objfile
->loc
);
24663 /* A helper function that fills in a dwarf2_loclist_baton. */
24666 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
24667 struct dwarf2_loclist_baton
*baton
,
24668 const struct attribute
*attr
)
24670 struct dwarf2_per_objfile
*dwarf2_per_objfile
24671 = cu
->per_cu
->dwarf2_per_objfile
;
24672 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24674 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
24676 baton
->per_cu
= cu
->per_cu
;
24677 gdb_assert (baton
->per_cu
);
24678 /* We don't know how long the location list is, but make sure we
24679 don't run off the edge of the section. */
24680 baton
->size
= section
->size
- DW_UNSND (attr
);
24681 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
24682 baton
->base_address
= cu
->base_address
;
24683 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
24687 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
24688 struct dwarf2_cu
*cu
, int is_block
)
24690 struct dwarf2_per_objfile
*dwarf2_per_objfile
24691 = cu
->per_cu
->dwarf2_per_objfile
;
24692 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24693 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24695 if (attr_form_is_section_offset (attr
)
24696 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
24697 the section. If so, fall through to the complaint in the
24699 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
24701 struct dwarf2_loclist_baton
*baton
;
24703 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
24705 fill_in_loclist_baton (cu
, baton
, attr
);
24707 if (cu
->base_known
== 0)
24708 complaint (&symfile_complaints
,
24709 _("Location list used without "
24710 "specifying the CU base address."));
24712 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24713 ? dwarf2_loclist_block_index
24714 : dwarf2_loclist_index
);
24715 SYMBOL_LOCATION_BATON (sym
) = baton
;
24719 struct dwarf2_locexpr_baton
*baton
;
24721 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
24722 baton
->per_cu
= cu
->per_cu
;
24723 gdb_assert (baton
->per_cu
);
24725 if (attr_form_is_block (attr
))
24727 /* Note that we're just copying the block's data pointer
24728 here, not the actual data. We're still pointing into the
24729 info_buffer for SYM's objfile; right now we never release
24730 that buffer, but when we do clean up properly this may
24732 baton
->size
= DW_BLOCK (attr
)->size
;
24733 baton
->data
= DW_BLOCK (attr
)->data
;
24737 dwarf2_invalid_attrib_class_complaint ("location description",
24738 SYMBOL_NATURAL_NAME (sym
));
24742 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24743 ? dwarf2_locexpr_block_index
24744 : dwarf2_locexpr_index
);
24745 SYMBOL_LOCATION_BATON (sym
) = baton
;
24749 /* Return the OBJFILE associated with the compilation unit CU. If CU
24750 came from a separate debuginfo file, then the master objfile is
24754 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
24756 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24758 /* Return the master objfile, so that we can report and look up the
24759 correct file containing this variable. */
24760 if (objfile
->separate_debug_objfile_backlink
)
24761 objfile
= objfile
->separate_debug_objfile_backlink
;
24766 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
24767 (CU_HEADERP is unused in such case) or prepare a temporary copy at
24768 CU_HEADERP first. */
24770 static const struct comp_unit_head
*
24771 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
24772 struct dwarf2_per_cu_data
*per_cu
)
24774 const gdb_byte
*info_ptr
;
24777 return &per_cu
->cu
->header
;
24779 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
24781 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
24782 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
24783 rcuh_kind::COMPILE
);
24788 /* Return the address size given in the compilation unit header for CU. */
24791 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24793 struct comp_unit_head cu_header_local
;
24794 const struct comp_unit_head
*cu_headerp
;
24796 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24798 return cu_headerp
->addr_size
;
24801 /* Return the offset size given in the compilation unit header for CU. */
24804 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
24806 struct comp_unit_head cu_header_local
;
24807 const struct comp_unit_head
*cu_headerp
;
24809 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24811 return cu_headerp
->offset_size
;
24814 /* See its dwarf2loc.h declaration. */
24817 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24819 struct comp_unit_head cu_header_local
;
24820 const struct comp_unit_head
*cu_headerp
;
24822 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24824 if (cu_headerp
->version
== 2)
24825 return cu_headerp
->addr_size
;
24827 return cu_headerp
->offset_size
;
24830 /* Return the text offset of the CU. The returned offset comes from
24831 this CU's objfile. If this objfile came from a separate debuginfo
24832 file, then the offset may be different from the corresponding
24833 offset in the parent objfile. */
24836 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
24838 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24840 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
24843 /* Return DWARF version number of PER_CU. */
24846 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
24848 return per_cu
->dwarf_version
;
24851 /* Locate the .debug_info compilation unit from CU's objfile which contains
24852 the DIE at OFFSET. Raises an error on failure. */
24854 static struct dwarf2_per_cu_data
*
24855 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
24856 unsigned int offset_in_dwz
,
24857 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
24859 struct dwarf2_per_cu_data
*this_cu
;
24861 const sect_offset
*cu_off
;
24864 high
= dwarf2_per_objfile
->all_comp_units
.size () - 1;
24867 struct dwarf2_per_cu_data
*mid_cu
;
24868 int mid
= low
+ (high
- low
) / 2;
24870 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
24871 cu_off
= &mid_cu
->sect_off
;
24872 if (mid_cu
->is_dwz
> offset_in_dwz
24873 || (mid_cu
->is_dwz
== offset_in_dwz
&& *cu_off
>= sect_off
))
24878 gdb_assert (low
== high
);
24879 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
24880 cu_off
= &this_cu
->sect_off
;
24881 if (this_cu
->is_dwz
!= offset_in_dwz
|| *cu_off
> sect_off
)
24883 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
24884 error (_("Dwarf Error: could not find partial DIE containing "
24885 "offset %s [in module %s]"),
24886 sect_offset_str (sect_off
),
24887 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
24889 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
24891 return dwarf2_per_objfile
->all_comp_units
[low
-1];
24895 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
24896 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
24897 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
24898 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
24899 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
24904 /* Initialize dwarf2_cu CU, owned by PER_CU. */
24906 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
24907 : per_cu (per_cu_
),
24910 checked_producer (0),
24911 producer_is_gxx_lt_4_6 (0),
24912 producer_is_gcc_lt_4_3 (0),
24913 producer_is_icc_lt_14 (0),
24914 processing_has_namespace_info (0)
24919 /* Destroy a dwarf2_cu. */
24921 dwarf2_cu::~dwarf2_cu ()
24926 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
24929 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
24930 enum language pretend_language
)
24932 struct attribute
*attr
;
24934 /* Set the language we're debugging. */
24935 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
24937 set_cu_language (DW_UNSND (attr
), cu
);
24940 cu
->language
= pretend_language
;
24941 cu
->language_defn
= language_def (cu
->language
);
24944 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
24947 /* Increase the age counter on each cached compilation unit, and free
24948 any that are too old. */
24951 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
24953 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
24955 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
24956 per_cu
= dwarf2_per_objfile
->read_in_chain
;
24957 while (per_cu
!= NULL
)
24959 per_cu
->cu
->last_used
++;
24960 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
24961 dwarf2_mark (per_cu
->cu
);
24962 per_cu
= per_cu
->cu
->read_in_chain
;
24965 per_cu
= dwarf2_per_objfile
->read_in_chain
;
24966 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
24967 while (per_cu
!= NULL
)
24969 struct dwarf2_per_cu_data
*next_cu
;
24971 next_cu
= per_cu
->cu
->read_in_chain
;
24973 if (!per_cu
->cu
->mark
)
24976 *last_chain
= next_cu
;
24979 last_chain
= &per_cu
->cu
->read_in_chain
;
24985 /* Remove a single compilation unit from the cache. */
24988 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
24990 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
24991 struct dwarf2_per_objfile
*dwarf2_per_objfile
24992 = target_per_cu
->dwarf2_per_objfile
;
24994 per_cu
= dwarf2_per_objfile
->read_in_chain
;
24995 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
24996 while (per_cu
!= NULL
)
24998 struct dwarf2_per_cu_data
*next_cu
;
25000 next_cu
= per_cu
->cu
->read_in_chain
;
25002 if (per_cu
== target_per_cu
)
25006 *last_chain
= next_cu
;
25010 last_chain
= &per_cu
->cu
->read_in_chain
;
25016 /* Release all extra memory associated with OBJFILE. */
25019 dwarf2_free_objfile (struct objfile
*objfile
)
25021 struct dwarf2_per_objfile
*dwarf2_per_objfile
25022 = get_dwarf2_per_objfile (objfile
);
25024 delete dwarf2_per_objfile
;
25027 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
25028 We store these in a hash table separate from the DIEs, and preserve them
25029 when the DIEs are flushed out of cache.
25031 The CU "per_cu" pointer is needed because offset alone is not enough to
25032 uniquely identify the type. A file may have multiple .debug_types sections,
25033 or the type may come from a DWO file. Furthermore, while it's more logical
25034 to use per_cu->section+offset, with Fission the section with the data is in
25035 the DWO file but we don't know that section at the point we need it.
25036 We have to use something in dwarf2_per_cu_data (or the pointer to it)
25037 because we can enter the lookup routine, get_die_type_at_offset, from
25038 outside this file, and thus won't necessarily have PER_CU->cu.
25039 Fortunately, PER_CU is stable for the life of the objfile. */
25041 struct dwarf2_per_cu_offset_and_type
25043 const struct dwarf2_per_cu_data
*per_cu
;
25044 sect_offset sect_off
;
25048 /* Hash function for a dwarf2_per_cu_offset_and_type. */
25051 per_cu_offset_and_type_hash (const void *item
)
25053 const struct dwarf2_per_cu_offset_and_type
*ofs
25054 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
25056 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
25059 /* Equality function for a dwarf2_per_cu_offset_and_type. */
25062 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
25064 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
25065 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
25066 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
25067 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
25069 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
25070 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
25073 /* Set the type associated with DIE to TYPE. Save it in CU's hash
25074 table if necessary. For convenience, return TYPE.
25076 The DIEs reading must have careful ordering to:
25077 * Not cause infite loops trying to read in DIEs as a prerequisite for
25078 reading current DIE.
25079 * Not trying to dereference contents of still incompletely read in types
25080 while reading in other DIEs.
25081 * Enable referencing still incompletely read in types just by a pointer to
25082 the type without accessing its fields.
25084 Therefore caller should follow these rules:
25085 * Try to fetch any prerequisite types we may need to build this DIE type
25086 before building the type and calling set_die_type.
25087 * After building type call set_die_type for current DIE as soon as
25088 possible before fetching more types to complete the current type.
25089 * Make the type as complete as possible before fetching more types. */
25091 static struct type
*
25092 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
25094 struct dwarf2_per_objfile
*dwarf2_per_objfile
25095 = cu
->per_cu
->dwarf2_per_objfile
;
25096 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
25097 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25098 struct attribute
*attr
;
25099 struct dynamic_prop prop
;
25101 /* For Ada types, make sure that the gnat-specific data is always
25102 initialized (if not already set). There are a few types where
25103 we should not be doing so, because the type-specific area is
25104 already used to hold some other piece of info (eg: TYPE_CODE_FLT
25105 where the type-specific area is used to store the floatformat).
25106 But this is not a problem, because the gnat-specific information
25107 is actually not needed for these types. */
25108 if (need_gnat_info (cu
)
25109 && TYPE_CODE (type
) != TYPE_CODE_FUNC
25110 && TYPE_CODE (type
) != TYPE_CODE_FLT
25111 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
25112 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
25113 && TYPE_CODE (type
) != TYPE_CODE_METHOD
25114 && !HAVE_GNAT_AUX_INFO (type
))
25115 INIT_GNAT_SPECIFIC (type
);
25117 /* Read DW_AT_allocated and set in type. */
25118 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
25119 if (attr_form_is_block (attr
))
25121 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25122 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
);
25124 else if (attr
!= NULL
)
25126 complaint (&symfile_complaints
,
25127 _("DW_AT_allocated has the wrong form (%s) at DIE %s"),
25128 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25129 sect_offset_str (die
->sect_off
));
25132 /* Read DW_AT_associated and set in type. */
25133 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
25134 if (attr_form_is_block (attr
))
25136 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25137 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
);
25139 else if (attr
!= NULL
)
25141 complaint (&symfile_complaints
,
25142 _("DW_AT_associated has the wrong form (%s) at DIE %s"),
25143 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25144 sect_offset_str (die
->sect_off
));
25147 /* Read DW_AT_data_location and set in type. */
25148 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
25149 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25150 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
);
25152 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25154 dwarf2_per_objfile
->die_type_hash
=
25155 htab_create_alloc_ex (127,
25156 per_cu_offset_and_type_hash
,
25157 per_cu_offset_and_type_eq
,
25159 &objfile
->objfile_obstack
,
25160 hashtab_obstack_allocate
,
25161 dummy_obstack_deallocate
);
25164 ofs
.per_cu
= cu
->per_cu
;
25165 ofs
.sect_off
= die
->sect_off
;
25167 slot
= (struct dwarf2_per_cu_offset_and_type
**)
25168 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
25170 complaint (&symfile_complaints
,
25171 _("A problem internal to GDB: DIE %s has type already set"),
25172 sect_offset_str (die
->sect_off
));
25173 *slot
= XOBNEW (&objfile
->objfile_obstack
,
25174 struct dwarf2_per_cu_offset_and_type
);
25179 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
25180 or return NULL if the die does not have a saved type. */
25182 static struct type
*
25183 get_die_type_at_offset (sect_offset sect_off
,
25184 struct dwarf2_per_cu_data
*per_cu
)
25186 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
25187 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
25189 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25192 ofs
.per_cu
= per_cu
;
25193 ofs
.sect_off
= sect_off
;
25194 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
25195 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
25202 /* Look up the type for DIE in CU in die_type_hash,
25203 or return NULL if DIE does not have a saved type. */
25205 static struct type
*
25206 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
25208 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
25211 /* Add a dependence relationship from CU to REF_PER_CU. */
25214 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
25215 struct dwarf2_per_cu_data
*ref_per_cu
)
25219 if (cu
->dependencies
== NULL
)
25221 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
25222 NULL
, &cu
->comp_unit_obstack
,
25223 hashtab_obstack_allocate
,
25224 dummy_obstack_deallocate
);
25226 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
25228 *slot
= ref_per_cu
;
25231 /* Subroutine of dwarf2_mark to pass to htab_traverse.
25232 Set the mark field in every compilation unit in the
25233 cache that we must keep because we are keeping CU. */
25236 dwarf2_mark_helper (void **slot
, void *data
)
25238 struct dwarf2_per_cu_data
*per_cu
;
25240 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
25242 /* cu->dependencies references may not yet have been ever read if QUIT aborts
25243 reading of the chain. As such dependencies remain valid it is not much
25244 useful to track and undo them during QUIT cleanups. */
25245 if (per_cu
->cu
== NULL
)
25248 if (per_cu
->cu
->mark
)
25250 per_cu
->cu
->mark
= 1;
25252 if (per_cu
->cu
->dependencies
!= NULL
)
25253 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25258 /* Set the mark field in CU and in every other compilation unit in the
25259 cache that we must keep because we are keeping CU. */
25262 dwarf2_mark (struct dwarf2_cu
*cu
)
25267 if (cu
->dependencies
!= NULL
)
25268 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25272 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
25276 per_cu
->cu
->mark
= 0;
25277 per_cu
= per_cu
->cu
->read_in_chain
;
25281 /* Trivial hash function for partial_die_info: the hash value of a DIE
25282 is its offset in .debug_info for this objfile. */
25285 partial_die_hash (const void *item
)
25287 const struct partial_die_info
*part_die
25288 = (const struct partial_die_info
*) item
;
25290 return to_underlying (part_die
->sect_off
);
25293 /* Trivial comparison function for partial_die_info structures: two DIEs
25294 are equal if they have the same offset. */
25297 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
25299 const struct partial_die_info
*part_die_lhs
25300 = (const struct partial_die_info
*) item_lhs
;
25301 const struct partial_die_info
*part_die_rhs
25302 = (const struct partial_die_info
*) item_rhs
;
25304 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
25307 static struct cmd_list_element
*set_dwarf_cmdlist
;
25308 static struct cmd_list_element
*show_dwarf_cmdlist
;
25311 set_dwarf_cmd (const char *args
, int from_tty
)
25313 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
25318 show_dwarf_cmd (const char *args
, int from_tty
)
25320 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
25323 int dwarf_always_disassemble
;
25326 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
25327 struct cmd_list_element
*c
, const char *value
)
25329 fprintf_filtered (file
,
25330 _("Whether to always disassemble "
25331 "DWARF expressions is %s.\n"),
25336 show_check_physname (struct ui_file
*file
, int from_tty
,
25337 struct cmd_list_element
*c
, const char *value
)
25339 fprintf_filtered (file
,
25340 _("Whether to check \"physname\" is %s.\n"),
25345 _initialize_dwarf2_read (void)
25348 dwarf2_objfile_data_key
= register_objfile_data ();
25350 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
25351 Set DWARF specific variables.\n\
25352 Configure DWARF variables such as the cache size"),
25353 &set_dwarf_cmdlist
, "maintenance set dwarf ",
25354 0/*allow-unknown*/, &maintenance_set_cmdlist
);
25356 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
25357 Show DWARF specific variables\n\
25358 Show DWARF variables such as the cache size"),
25359 &show_dwarf_cmdlist
, "maintenance show dwarf ",
25360 0/*allow-unknown*/, &maintenance_show_cmdlist
);
25362 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
25363 &dwarf_max_cache_age
, _("\
25364 Set the upper bound on the age of cached DWARF compilation units."), _("\
25365 Show the upper bound on the age of cached DWARF compilation units."), _("\
25366 A higher limit means that cached compilation units will be stored\n\
25367 in memory longer, and more total memory will be used. Zero disables\n\
25368 caching, which can slow down startup."),
25370 show_dwarf_max_cache_age
,
25371 &set_dwarf_cmdlist
,
25372 &show_dwarf_cmdlist
);
25374 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
25375 &dwarf_always_disassemble
, _("\
25376 Set whether `info address' always disassembles DWARF expressions."), _("\
25377 Show whether `info address' always disassembles DWARF expressions."), _("\
25378 When enabled, DWARF expressions are always printed in an assembly-like\n\
25379 syntax. When disabled, expressions will be printed in a more\n\
25380 conversational style, when possible."),
25382 show_dwarf_always_disassemble
,
25383 &set_dwarf_cmdlist
,
25384 &show_dwarf_cmdlist
);
25386 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
25387 Set debugging of the DWARF reader."), _("\
25388 Show debugging of the DWARF reader."), _("\
25389 When enabled (non-zero), debugging messages are printed during DWARF\n\
25390 reading and symtab expansion. A value of 1 (one) provides basic\n\
25391 information. A value greater than 1 provides more verbose information."),
25394 &setdebuglist
, &showdebuglist
);
25396 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
25397 Set debugging of the DWARF DIE reader."), _("\
25398 Show debugging of the DWARF DIE reader."), _("\
25399 When enabled (non-zero), DIEs are dumped after they are read in.\n\
25400 The value is the maximum depth to print."),
25403 &setdebuglist
, &showdebuglist
);
25405 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
25406 Set debugging of the dwarf line reader."), _("\
25407 Show debugging of the dwarf line reader."), _("\
25408 When enabled (non-zero), line number entries are dumped as they are read in.\n\
25409 A value of 1 (one) provides basic information.\n\
25410 A value greater than 1 provides more verbose information."),
25413 &setdebuglist
, &showdebuglist
);
25415 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
25416 Set cross-checking of \"physname\" code against demangler."), _("\
25417 Show cross-checking of \"physname\" code against demangler."), _("\
25418 When enabled, GDB's internal \"physname\" code is checked against\n\
25420 NULL
, show_check_physname
,
25421 &setdebuglist
, &showdebuglist
);
25423 add_setshow_boolean_cmd ("use-deprecated-index-sections",
25424 no_class
, &use_deprecated_index_sections
, _("\
25425 Set whether to use deprecated gdb_index sections."), _("\
25426 Show whether to use deprecated gdb_index sections."), _("\
25427 When enabled, deprecated .gdb_index sections are used anyway.\n\
25428 Normally they are ignored either because of a missing feature or\n\
25429 performance issue.\n\
25430 Warning: This option must be enabled before gdb reads the file."),
25433 &setlist
, &showlist
);
25435 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25436 &dwarf2_locexpr_funcs
);
25437 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25438 &dwarf2_loclist_funcs
);
25440 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25441 &dwarf2_block_frame_base_locexpr_funcs
);
25442 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25443 &dwarf2_block_frame_base_loclist_funcs
);
25446 selftests::register_test ("dw2_expand_symtabs_matching",
25447 selftests::dw2_expand_symtabs_matching::run_test
);