1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2018 Free Software Foundation, Inc.
5 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
6 Inc. with support from Florida State University (under contract
7 with the Ada Joint Program Office), and Silicon Graphics, Inc.
8 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
9 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
12 This file is part of GDB.
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 3 of the License, or
17 (at your option) any later version.
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 /* FIXME: Various die-reading functions need to be more careful with
28 reading off the end of the section.
29 E.g., load_partial_dies, read_partial_die. */
32 #include "dwarf2read.h"
33 #include "dwarf-index-common.h"
42 #include "gdb-demangle.h"
43 #include "expression.h"
44 #include "filenames.h" /* for DOSish file names */
47 #include "complaints.h"
49 #include "dwarf2expr.h"
50 #include "dwarf2loc.h"
51 #include "cp-support.h"
57 #include "typeprint.h"
60 #include "completer.h"
65 #include "gdbcore.h" /* for gnutarget */
66 #include "gdb/gdb-index.h"
71 #include "filestuff.h"
73 #include "namespace.h"
74 #include "common/gdb_unlinker.h"
75 #include "common/function-view.h"
76 #include "common/gdb_optional.h"
77 #include "common/underlying.h"
78 #include "common/byte-vector.h"
79 #include "common/hash_enum.h"
80 #include "filename-seen-cache.h"
83 #include <sys/types.h>
85 #include <unordered_set>
86 #include <unordered_map>
90 #include <forward_list>
91 #include "rust-lang.h"
92 #include "common/pathstuff.h"
94 /* When == 1, print basic high level tracing messages.
95 When > 1, be more verbose.
96 This is in contrast to the low level DIE reading of dwarf_die_debug. */
97 static unsigned int dwarf_read_debug
= 0;
99 /* When non-zero, dump DIEs after they are read in. */
100 static unsigned int dwarf_die_debug
= 0;
102 /* When non-zero, dump line number entries as they are read in. */
103 static unsigned int dwarf_line_debug
= 0;
105 /* When non-zero, cross-check physname against demangler. */
106 static int check_physname
= 0;
108 /* When non-zero, do not reject deprecated .gdb_index sections. */
109 static int use_deprecated_index_sections
= 0;
111 static const struct objfile_data
*dwarf2_objfile_data_key
;
113 /* The "aclass" indices for various kinds of computed DWARF symbols. */
115 static int dwarf2_locexpr_index
;
116 static int dwarf2_loclist_index
;
117 static int dwarf2_locexpr_block_index
;
118 static int dwarf2_loclist_block_index
;
120 /* An index into a (C++) symbol name component in a symbol name as
121 recorded in the mapped_index's symbol table. For each C++ symbol
122 in the symbol table, we record one entry for the start of each
123 component in the symbol in a table of name components, and then
124 sort the table, in order to be able to binary search symbol names,
125 ignoring leading namespaces, both completion and regular look up.
126 For example, for symbol "A::B::C", we'll have an entry that points
127 to "A::B::C", another that points to "B::C", and another for "C".
128 Note that function symbols in GDB index have no parameter
129 information, just the function/method names. You can convert a
130 name_component to a "const char *" using the
131 'mapped_index::symbol_name_at(offset_type)' method. */
133 struct name_component
135 /* Offset in the symbol name where the component starts. Stored as
136 a (32-bit) offset instead of a pointer to save memory and improve
137 locality on 64-bit architectures. */
138 offset_type name_offset
;
140 /* The symbol's index in the symbol and constant pool tables of a
145 /* Base class containing bits shared by both .gdb_index and
146 .debug_name indexes. */
148 struct mapped_index_base
150 mapped_index_base () = default;
151 DISABLE_COPY_AND_ASSIGN (mapped_index_base
);
153 /* The name_component table (a sorted vector). See name_component's
154 description above. */
155 std::vector
<name_component
> name_components
;
157 /* How NAME_COMPONENTS is sorted. */
158 enum case_sensitivity name_components_casing
;
160 /* Return the number of names in the symbol table. */
161 virtual size_t symbol_name_count () const = 0;
163 /* Get the name of the symbol at IDX in the symbol table. */
164 virtual const char *symbol_name_at (offset_type idx
) const = 0;
166 /* Return whether the name at IDX in the symbol table should be
168 virtual bool symbol_name_slot_invalid (offset_type idx
) const
173 /* Build the symbol name component sorted vector, if we haven't
175 void build_name_components ();
177 /* Returns the lower (inclusive) and upper (exclusive) bounds of the
178 possible matches for LN_NO_PARAMS in the name component
180 std::pair
<std::vector
<name_component
>::const_iterator
,
181 std::vector
<name_component
>::const_iterator
>
182 find_name_components_bounds (const lookup_name_info
&ln_no_params
) const;
184 /* Prevent deleting/destroying via a base class pointer. */
186 ~mapped_index_base() = default;
189 /* A description of the mapped index. The file format is described in
190 a comment by the code that writes the index. */
191 struct mapped_index final
: public mapped_index_base
193 /* A slot/bucket in the symbol table hash. */
194 struct symbol_table_slot
196 const offset_type name
;
197 const offset_type vec
;
200 /* Index data format version. */
203 /* The address table data. */
204 gdb::array_view
<const gdb_byte
> address_table
;
206 /* The symbol table, implemented as a hash table. */
207 gdb::array_view
<symbol_table_slot
> symbol_table
;
209 /* A pointer to the constant pool. */
210 const char *constant_pool
= nullptr;
212 bool symbol_name_slot_invalid (offset_type idx
) const override
214 const auto &bucket
= this->symbol_table
[idx
];
215 return bucket
.name
== 0 && bucket
.vec
;
218 /* Convenience method to get at the name of the symbol at IDX in the
220 const char *symbol_name_at (offset_type idx
) const override
221 { return this->constant_pool
+ MAYBE_SWAP (this->symbol_table
[idx
].name
); }
223 size_t symbol_name_count () const override
224 { return this->symbol_table
.size (); }
227 /* A description of the mapped .debug_names.
228 Uninitialized map has CU_COUNT 0. */
229 struct mapped_debug_names final
: public mapped_index_base
231 mapped_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile_
)
232 : dwarf2_per_objfile (dwarf2_per_objfile_
)
235 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
236 bfd_endian dwarf5_byte_order
;
237 bool dwarf5_is_dwarf64
;
238 bool augmentation_is_gdb
;
240 uint32_t cu_count
= 0;
241 uint32_t tu_count
, bucket_count
, name_count
;
242 const gdb_byte
*cu_table_reordered
, *tu_table_reordered
;
243 const uint32_t *bucket_table_reordered
, *hash_table_reordered
;
244 const gdb_byte
*name_table_string_offs_reordered
;
245 const gdb_byte
*name_table_entry_offs_reordered
;
246 const gdb_byte
*entry_pool
;
253 /* Attribute name DW_IDX_*. */
256 /* Attribute form DW_FORM_*. */
259 /* Value if FORM is DW_FORM_implicit_const. */
260 LONGEST implicit_const
;
262 std::vector
<attr
> attr_vec
;
265 std::unordered_map
<ULONGEST
, index_val
> abbrev_map
;
267 const char *namei_to_name (uint32_t namei
) const;
269 /* Implementation of the mapped_index_base virtual interface, for
270 the name_components cache. */
272 const char *symbol_name_at (offset_type idx
) const override
273 { return namei_to_name (idx
); }
275 size_t symbol_name_count () const override
276 { return this->name_count
; }
279 /* See dwarf2read.h. */
282 get_dwarf2_per_objfile (struct objfile
*objfile
)
284 return ((struct dwarf2_per_objfile
*)
285 objfile_data (objfile
, dwarf2_objfile_data_key
));
288 /* Set the dwarf2_per_objfile associated to OBJFILE. */
291 set_dwarf2_per_objfile (struct objfile
*objfile
,
292 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
294 gdb_assert (get_dwarf2_per_objfile (objfile
) == NULL
);
295 set_objfile_data (objfile
, dwarf2_objfile_data_key
, dwarf2_per_objfile
);
298 /* Default names of the debugging sections. */
300 /* Note that if the debugging section has been compressed, it might
301 have a name like .zdebug_info. */
303 static const struct dwarf2_debug_sections dwarf2_elf_names
=
305 { ".debug_info", ".zdebug_info" },
306 { ".debug_abbrev", ".zdebug_abbrev" },
307 { ".debug_line", ".zdebug_line" },
308 { ".debug_loc", ".zdebug_loc" },
309 { ".debug_loclists", ".zdebug_loclists" },
310 { ".debug_macinfo", ".zdebug_macinfo" },
311 { ".debug_macro", ".zdebug_macro" },
312 { ".debug_str", ".zdebug_str" },
313 { ".debug_line_str", ".zdebug_line_str" },
314 { ".debug_ranges", ".zdebug_ranges" },
315 { ".debug_rnglists", ".zdebug_rnglists" },
316 { ".debug_types", ".zdebug_types" },
317 { ".debug_addr", ".zdebug_addr" },
318 { ".debug_frame", ".zdebug_frame" },
319 { ".eh_frame", NULL
},
320 { ".gdb_index", ".zgdb_index" },
321 { ".debug_names", ".zdebug_names" },
322 { ".debug_aranges", ".zdebug_aranges" },
326 /* List of DWO/DWP sections. */
328 static const struct dwop_section_names
330 struct dwarf2_section_names abbrev_dwo
;
331 struct dwarf2_section_names info_dwo
;
332 struct dwarf2_section_names line_dwo
;
333 struct dwarf2_section_names loc_dwo
;
334 struct dwarf2_section_names loclists_dwo
;
335 struct dwarf2_section_names macinfo_dwo
;
336 struct dwarf2_section_names macro_dwo
;
337 struct dwarf2_section_names str_dwo
;
338 struct dwarf2_section_names str_offsets_dwo
;
339 struct dwarf2_section_names types_dwo
;
340 struct dwarf2_section_names cu_index
;
341 struct dwarf2_section_names tu_index
;
345 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
346 { ".debug_info.dwo", ".zdebug_info.dwo" },
347 { ".debug_line.dwo", ".zdebug_line.dwo" },
348 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
349 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
350 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
351 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
352 { ".debug_str.dwo", ".zdebug_str.dwo" },
353 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
354 { ".debug_types.dwo", ".zdebug_types.dwo" },
355 { ".debug_cu_index", ".zdebug_cu_index" },
356 { ".debug_tu_index", ".zdebug_tu_index" },
359 /* local data types */
361 /* The data in a compilation unit header, after target2host
362 translation, looks like this. */
363 struct comp_unit_head
367 unsigned char addr_size
;
368 unsigned char signed_addr_p
;
369 sect_offset abbrev_sect_off
;
371 /* Size of file offsets; either 4 or 8. */
372 unsigned int offset_size
;
374 /* Size of the length field; either 4 or 12. */
375 unsigned int initial_length_size
;
377 enum dwarf_unit_type unit_type
;
379 /* Offset to the first byte of this compilation unit header in the
380 .debug_info section, for resolving relative reference dies. */
381 sect_offset sect_off
;
383 /* Offset to first die in this cu from the start of the cu.
384 This will be the first byte following the compilation unit header. */
385 cu_offset first_die_cu_offset
;
387 /* 64-bit signature of this type unit - it is valid only for
388 UNIT_TYPE DW_UT_type. */
391 /* For types, offset in the type's DIE of the type defined by this TU. */
392 cu_offset type_cu_offset_in_tu
;
395 /* Type used for delaying computation of method physnames.
396 See comments for compute_delayed_physnames. */
397 struct delayed_method_info
399 /* The type to which the method is attached, i.e., its parent class. */
402 /* The index of the method in the type's function fieldlists. */
405 /* The index of the method in the fieldlist. */
408 /* The name of the DIE. */
411 /* The DIE associated with this method. */
412 struct die_info
*die
;
415 /* Internal state when decoding a particular compilation unit. */
418 explicit dwarf2_cu (struct dwarf2_per_cu_data
*per_cu
);
421 DISABLE_COPY_AND_ASSIGN (dwarf2_cu
);
423 /* The header of the compilation unit. */
424 struct comp_unit_head header
{};
426 /* Base address of this compilation unit. */
427 CORE_ADDR base_address
= 0;
429 /* Non-zero if base_address has been set. */
432 /* The language we are debugging. */
433 enum language language
= language_unknown
;
434 const struct language_defn
*language_defn
= nullptr;
436 const char *producer
= nullptr;
438 /* The generic symbol table building routines have separate lists for
439 file scope symbols and all all other scopes (local scopes). So
440 we need to select the right one to pass to add_symbol_to_list().
441 We do it by keeping a pointer to the correct list in list_in_scope.
443 FIXME: The original dwarf code just treated the file scope as the
444 first local scope, and all other local scopes as nested local
445 scopes, and worked fine. Check to see if we really need to
446 distinguish these in buildsym.c. */
447 struct pending
**list_in_scope
= nullptr;
449 /* Hash table holding all the loaded partial DIEs
450 with partial_die->offset.SECT_OFF as hash. */
451 htab_t partial_dies
= nullptr;
453 /* Storage for things with the same lifetime as this read-in compilation
454 unit, including partial DIEs. */
455 auto_obstack comp_unit_obstack
;
457 /* When multiple dwarf2_cu structures are living in memory, this field
458 chains them all together, so that they can be released efficiently.
459 We will probably also want a generation counter so that most-recently-used
460 compilation units are cached... */
461 struct dwarf2_per_cu_data
*read_in_chain
= nullptr;
463 /* Backlink to our per_cu entry. */
464 struct dwarf2_per_cu_data
*per_cu
;
466 /* How many compilation units ago was this CU last referenced? */
469 /* A hash table of DIE cu_offset for following references with
470 die_info->offset.sect_off as hash. */
471 htab_t die_hash
= nullptr;
473 /* Full DIEs if read in. */
474 struct die_info
*dies
= nullptr;
476 /* A set of pointers to dwarf2_per_cu_data objects for compilation
477 units referenced by this one. Only set during full symbol processing;
478 partial symbol tables do not have dependencies. */
479 htab_t dependencies
= nullptr;
481 /* Header data from the line table, during full symbol processing. */
482 struct line_header
*line_header
= nullptr;
483 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
484 it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL,
485 this is the DW_TAG_compile_unit die for this CU. We'll hold on
486 to the line header as long as this DIE is being processed. See
487 process_die_scope. */
488 die_info
*line_header_die_owner
= nullptr;
490 /* A list of methods which need to have physnames computed
491 after all type information has been read. */
492 std::vector
<delayed_method_info
> method_list
;
494 /* To be copied to symtab->call_site_htab. */
495 htab_t call_site_htab
= nullptr;
497 /* Non-NULL if this CU came from a DWO file.
498 There is an invariant here that is important to remember:
499 Except for attributes copied from the top level DIE in the "main"
500 (or "stub") file in preparation for reading the DWO file
501 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
502 Either there isn't a DWO file (in which case this is NULL and the point
503 is moot), or there is and either we're not going to read it (in which
504 case this is NULL) or there is and we are reading it (in which case this
506 struct dwo_unit
*dwo_unit
= nullptr;
508 /* The DW_AT_addr_base attribute if present, zero otherwise
509 (zero is a valid value though).
510 Note this value comes from the Fission stub CU/TU's DIE. */
511 ULONGEST addr_base
= 0;
513 /* The DW_AT_ranges_base attribute if present, zero otherwise
514 (zero is a valid value though).
515 Note this value comes from the Fission stub CU/TU's DIE.
516 Also note that the value is zero in the non-DWO case so this value can
517 be used without needing to know whether DWO files are in use or not.
518 N.B. This does not apply to DW_AT_ranges appearing in
519 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
520 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
521 DW_AT_ranges_base *would* have to be applied, and we'd have to care
522 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
523 ULONGEST ranges_base
= 0;
525 /* When reading debug info generated by older versions of rustc, we
526 have to rewrite some union types to be struct types with a
527 variant part. This rewriting must be done after the CU is fully
528 read in, because otherwise at the point of rewriting some struct
529 type might not have been fully processed. So, we keep a list of
530 all such types here and process them after expansion. */
531 std::vector
<struct type
*> rust_unions
;
533 /* Mark used when releasing cached dies. */
534 unsigned int mark
: 1;
536 /* This CU references .debug_loc. See the symtab->locations_valid field.
537 This test is imperfect as there may exist optimized debug code not using
538 any location list and still facing inlining issues if handled as
539 unoptimized code. For a future better test see GCC PR other/32998. */
540 unsigned int has_loclist
: 1;
542 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
543 if all the producer_is_* fields are valid. This information is cached
544 because profiling CU expansion showed excessive time spent in
545 producer_is_gxx_lt_4_6. */
546 unsigned int checked_producer
: 1;
547 unsigned int producer_is_gxx_lt_4_6
: 1;
548 unsigned int producer_is_gcc_lt_4_3
: 1;
549 unsigned int producer_is_icc_lt_14
: 1;
551 /* When set, the file that we're processing is known to have
552 debugging info for C++ namespaces. GCC 3.3.x did not produce
553 this information, but later versions do. */
555 unsigned int processing_has_namespace_info
: 1;
557 struct partial_die_info
*find_partial_die (sect_offset sect_off
);
560 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
561 This includes type_unit_group and quick_file_names. */
563 struct stmt_list_hash
565 /* The DWO unit this table is from or NULL if there is none. */
566 struct dwo_unit
*dwo_unit
;
568 /* Offset in .debug_line or .debug_line.dwo. */
569 sect_offset line_sect_off
;
572 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
573 an object of this type. */
575 struct type_unit_group
577 /* dwarf2read.c's main "handle" on a TU symtab.
578 To simplify things we create an artificial CU that "includes" all the
579 type units using this stmt_list so that the rest of the code still has
580 a "per_cu" handle on the symtab.
581 This PER_CU is recognized by having no section. */
582 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
583 struct dwarf2_per_cu_data per_cu
;
585 /* The TUs that share this DW_AT_stmt_list entry.
586 This is added to while parsing type units to build partial symtabs,
587 and is deleted afterwards and not used again. */
588 VEC (sig_type_ptr
) *tus
;
590 /* The compunit symtab.
591 Type units in a group needn't all be defined in the same source file,
592 so we create an essentially anonymous symtab as the compunit symtab. */
593 struct compunit_symtab
*compunit_symtab
;
595 /* The data used to construct the hash key. */
596 struct stmt_list_hash hash
;
598 /* The number of symtabs from the line header.
599 The value here must match line_header.num_file_names. */
600 unsigned int num_symtabs
;
602 /* The symbol tables for this TU (obtained from the files listed in
604 WARNING: The order of entries here must match the order of entries
605 in the line header. After the first TU using this type_unit_group, the
606 line header for the subsequent TUs is recreated from this. This is done
607 because we need to use the same symtabs for each TU using the same
608 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
609 there's no guarantee the line header doesn't have duplicate entries. */
610 struct symtab
**symtabs
;
613 /* These sections are what may appear in a (real or virtual) DWO file. */
617 struct dwarf2_section_info abbrev
;
618 struct dwarf2_section_info line
;
619 struct dwarf2_section_info loc
;
620 struct dwarf2_section_info loclists
;
621 struct dwarf2_section_info macinfo
;
622 struct dwarf2_section_info macro
;
623 struct dwarf2_section_info str
;
624 struct dwarf2_section_info str_offsets
;
625 /* In the case of a virtual DWO file, these two are unused. */
626 struct dwarf2_section_info info
;
627 VEC (dwarf2_section_info_def
) *types
;
630 /* CUs/TUs in DWP/DWO files. */
634 /* Backlink to the containing struct dwo_file. */
635 struct dwo_file
*dwo_file
;
637 /* The "id" that distinguishes this CU/TU.
638 .debug_info calls this "dwo_id", .debug_types calls this "signature".
639 Since signatures came first, we stick with it for consistency. */
642 /* The section this CU/TU lives in, in the DWO file. */
643 struct dwarf2_section_info
*section
;
645 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
646 sect_offset sect_off
;
649 /* For types, offset in the type's DIE of the type defined by this TU. */
650 cu_offset type_offset_in_tu
;
653 /* include/dwarf2.h defines the DWP section codes.
654 It defines a max value but it doesn't define a min value, which we
655 use for error checking, so provide one. */
657 enum dwp_v2_section_ids
662 /* Data for one DWO file.
664 This includes virtual DWO files (a virtual DWO file is a DWO file as it
665 appears in a DWP file). DWP files don't really have DWO files per se -
666 comdat folding of types "loses" the DWO file they came from, and from
667 a high level view DWP files appear to contain a mass of random types.
668 However, to maintain consistency with the non-DWP case we pretend DWP
669 files contain virtual DWO files, and we assign each TU with one virtual
670 DWO file (generally based on the line and abbrev section offsets -
671 a heuristic that seems to work in practice). */
675 /* The DW_AT_GNU_dwo_name attribute.
676 For virtual DWO files the name is constructed from the section offsets
677 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
678 from related CU+TUs. */
679 const char *dwo_name
;
681 /* The DW_AT_comp_dir attribute. */
682 const char *comp_dir
;
684 /* The bfd, when the file is open. Otherwise this is NULL.
685 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
688 /* The sections that make up this DWO file.
689 Remember that for virtual DWO files in DWP V2, these are virtual
690 sections (for lack of a better name). */
691 struct dwo_sections sections
;
693 /* The CUs in the file.
694 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
695 an extension to handle LLVM's Link Time Optimization output (where
696 multiple source files may be compiled into a single object/dwo pair). */
699 /* Table of TUs in the file.
700 Each element is a struct dwo_unit. */
704 /* These sections are what may appear in a DWP file. */
708 /* These are used by both DWP version 1 and 2. */
709 struct dwarf2_section_info str
;
710 struct dwarf2_section_info cu_index
;
711 struct dwarf2_section_info tu_index
;
713 /* These are only used by DWP version 2 files.
714 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
715 sections are referenced by section number, and are not recorded here.
716 In DWP version 2 there is at most one copy of all these sections, each
717 section being (effectively) comprised of the concatenation of all of the
718 individual sections that exist in the version 1 format.
719 To keep the code simple we treat each of these concatenated pieces as a
720 section itself (a virtual section?). */
721 struct dwarf2_section_info abbrev
;
722 struct dwarf2_section_info info
;
723 struct dwarf2_section_info line
;
724 struct dwarf2_section_info loc
;
725 struct dwarf2_section_info macinfo
;
726 struct dwarf2_section_info macro
;
727 struct dwarf2_section_info str_offsets
;
728 struct dwarf2_section_info types
;
731 /* These sections are what may appear in a virtual DWO file in DWP version 1.
732 A virtual DWO file is a DWO file as it appears in a DWP file. */
734 struct virtual_v1_dwo_sections
736 struct dwarf2_section_info abbrev
;
737 struct dwarf2_section_info line
;
738 struct dwarf2_section_info loc
;
739 struct dwarf2_section_info macinfo
;
740 struct dwarf2_section_info macro
;
741 struct dwarf2_section_info str_offsets
;
742 /* Each DWP hash table entry records one CU or one TU.
743 That is recorded here, and copied to dwo_unit.section. */
744 struct dwarf2_section_info info_or_types
;
747 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
748 In version 2, the sections of the DWO files are concatenated together
749 and stored in one section of that name. Thus each ELF section contains
750 several "virtual" sections. */
752 struct virtual_v2_dwo_sections
754 bfd_size_type abbrev_offset
;
755 bfd_size_type abbrev_size
;
757 bfd_size_type line_offset
;
758 bfd_size_type line_size
;
760 bfd_size_type loc_offset
;
761 bfd_size_type loc_size
;
763 bfd_size_type macinfo_offset
;
764 bfd_size_type macinfo_size
;
766 bfd_size_type macro_offset
;
767 bfd_size_type macro_size
;
769 bfd_size_type str_offsets_offset
;
770 bfd_size_type str_offsets_size
;
772 /* Each DWP hash table entry records one CU or one TU.
773 That is recorded here, and copied to dwo_unit.section. */
774 bfd_size_type info_or_types_offset
;
775 bfd_size_type info_or_types_size
;
778 /* Contents of DWP hash tables. */
780 struct dwp_hash_table
782 uint32_t version
, nr_columns
;
783 uint32_t nr_units
, nr_slots
;
784 const gdb_byte
*hash_table
, *unit_table
;
789 const gdb_byte
*indices
;
793 /* This is indexed by column number and gives the id of the section
795 #define MAX_NR_V2_DWO_SECTIONS \
796 (1 /* .debug_info or .debug_types */ \
797 + 1 /* .debug_abbrev */ \
798 + 1 /* .debug_line */ \
799 + 1 /* .debug_loc */ \
800 + 1 /* .debug_str_offsets */ \
801 + 1 /* .debug_macro or .debug_macinfo */)
802 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
803 const gdb_byte
*offsets
;
804 const gdb_byte
*sizes
;
809 /* Data for one DWP file. */
813 dwp_file (const char *name_
, gdb_bfd_ref_ptr
&&abfd
)
815 dbfd (std::move (abfd
))
819 /* Name of the file. */
822 /* File format version. */
826 gdb_bfd_ref_ptr dbfd
;
828 /* Section info for this file. */
829 struct dwp_sections sections
{};
831 /* Table of CUs in the file. */
832 const struct dwp_hash_table
*cus
= nullptr;
834 /* Table of TUs in the file. */
835 const struct dwp_hash_table
*tus
= nullptr;
837 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
838 htab_t loaded_cus
{};
839 htab_t loaded_tus
{};
841 /* Table to map ELF section numbers to their sections.
842 This is only needed for the DWP V1 file format. */
843 unsigned int num_sections
= 0;
844 asection
**elf_sections
= nullptr;
847 /* This represents a '.dwz' file. */
851 dwz_file (gdb_bfd_ref_ptr
&&bfd
)
852 : dwz_bfd (std::move (bfd
))
856 /* A dwz file can only contain a few sections. */
857 struct dwarf2_section_info abbrev
{};
858 struct dwarf2_section_info info
{};
859 struct dwarf2_section_info str
{};
860 struct dwarf2_section_info line
{};
861 struct dwarf2_section_info macro
{};
862 struct dwarf2_section_info gdb_index
{};
863 struct dwarf2_section_info debug_names
{};
866 gdb_bfd_ref_ptr dwz_bfd
;
869 /* Struct used to pass misc. parameters to read_die_and_children, et
870 al. which are used for both .debug_info and .debug_types dies.
871 All parameters here are unchanging for the life of the call. This
872 struct exists to abstract away the constant parameters of die reading. */
874 struct die_reader_specs
876 /* The bfd of die_section. */
879 /* The CU of the DIE we are parsing. */
880 struct dwarf2_cu
*cu
;
882 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
883 struct dwo_file
*dwo_file
;
885 /* The section the die comes from.
886 This is either .debug_info or .debug_types, or the .dwo variants. */
887 struct dwarf2_section_info
*die_section
;
889 /* die_section->buffer. */
890 const gdb_byte
*buffer
;
892 /* The end of the buffer. */
893 const gdb_byte
*buffer_end
;
895 /* The value of the DW_AT_comp_dir attribute. */
896 const char *comp_dir
;
898 /* The abbreviation table to use when reading the DIEs. */
899 struct abbrev_table
*abbrev_table
;
902 /* Type of function passed to init_cutu_and_read_dies, et.al. */
903 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
904 const gdb_byte
*info_ptr
,
905 struct die_info
*comp_unit_die
,
909 /* A 1-based directory index. This is a strong typedef to prevent
910 accidentally using a directory index as a 0-based index into an
912 enum class dir_index
: unsigned int {};
914 /* Likewise, a 1-based file name index. */
915 enum class file_name_index
: unsigned int {};
919 file_entry () = default;
921 file_entry (const char *name_
, dir_index d_index_
,
922 unsigned int mod_time_
, unsigned int length_
)
925 mod_time (mod_time_
),
929 /* Return the include directory at D_INDEX stored in LH. Returns
930 NULL if D_INDEX is out of bounds. */
931 const char *include_dir (const line_header
*lh
) const;
933 /* The file name. Note this is an observing pointer. The memory is
934 owned by debug_line_buffer. */
937 /* The directory index (1-based). */
938 dir_index d_index
{};
940 unsigned int mod_time
{};
942 unsigned int length
{};
944 /* True if referenced by the Line Number Program. */
947 /* The associated symbol table, if any. */
948 struct symtab
*symtab
{};
951 /* The line number information for a compilation unit (found in the
952 .debug_line section) begins with a "statement program header",
953 which contains the following information. */
960 /* Add an entry to the include directory table. */
961 void add_include_dir (const char *include_dir
);
963 /* Add an entry to the file name table. */
964 void add_file_name (const char *name
, dir_index d_index
,
965 unsigned int mod_time
, unsigned int length
);
967 /* Return the include dir at INDEX (1-based). Returns NULL if INDEX
969 const char *include_dir_at (dir_index index
) const
971 /* Convert directory index number (1-based) to vector index
973 size_t vec_index
= to_underlying (index
) - 1;
975 if (vec_index
>= include_dirs
.size ())
977 return include_dirs
[vec_index
];
980 /* Return the file name at INDEX (1-based). Returns NULL if INDEX
982 file_entry
*file_name_at (file_name_index index
)
984 /* Convert file name index number (1-based) to vector index
986 size_t vec_index
= to_underlying (index
) - 1;
988 if (vec_index
>= file_names
.size ())
990 return &file_names
[vec_index
];
993 /* Const version of the above. */
994 const file_entry
*file_name_at (unsigned int index
) const
996 if (index
>= file_names
.size ())
998 return &file_names
[index
];
1001 /* Offset of line number information in .debug_line section. */
1002 sect_offset sect_off
{};
1004 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1005 unsigned offset_in_dwz
: 1; /* Can't initialize bitfields in-class. */
1007 unsigned int total_length
{};
1008 unsigned short version
{};
1009 unsigned int header_length
{};
1010 unsigned char minimum_instruction_length
{};
1011 unsigned char maximum_ops_per_instruction
{};
1012 unsigned char default_is_stmt
{};
1014 unsigned char line_range
{};
1015 unsigned char opcode_base
{};
1017 /* standard_opcode_lengths[i] is the number of operands for the
1018 standard opcode whose value is i. This means that
1019 standard_opcode_lengths[0] is unused, and the last meaningful
1020 element is standard_opcode_lengths[opcode_base - 1]. */
1021 std::unique_ptr
<unsigned char[]> standard_opcode_lengths
;
1023 /* The include_directories table. Note these are observing
1024 pointers. The memory is owned by debug_line_buffer. */
1025 std::vector
<const char *> include_dirs
;
1027 /* The file_names table. */
1028 std::vector
<file_entry
> file_names
;
1030 /* The start and end of the statement program following this
1031 header. These point into dwarf2_per_objfile->line_buffer. */
1032 const gdb_byte
*statement_program_start
{}, *statement_program_end
{};
1035 typedef std::unique_ptr
<line_header
> line_header_up
;
1038 file_entry::include_dir (const line_header
*lh
) const
1040 return lh
->include_dir_at (d_index
);
1043 /* When we construct a partial symbol table entry we only
1044 need this much information. */
1045 struct partial_die_info
: public allocate_on_obstack
1047 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
1049 /* Disable assign but still keep copy ctor, which is needed
1050 load_partial_dies. */
1051 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
1053 /* Adjust the partial die before generating a symbol for it. This
1054 function may set the is_external flag or change the DIE's
1056 void fixup (struct dwarf2_cu
*cu
);
1058 /* Read a minimal amount of information into the minimal die
1060 const gdb_byte
*read (const struct die_reader_specs
*reader
,
1061 const struct abbrev_info
&abbrev
,
1062 const gdb_byte
*info_ptr
);
1064 /* Offset of this DIE. */
1065 const sect_offset sect_off
;
1067 /* DWARF-2 tag for this DIE. */
1068 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1070 /* Assorted flags describing the data found in this DIE. */
1071 const unsigned int has_children
: 1;
1073 unsigned int is_external
: 1;
1074 unsigned int is_declaration
: 1;
1075 unsigned int has_type
: 1;
1076 unsigned int has_specification
: 1;
1077 unsigned int has_pc_info
: 1;
1078 unsigned int may_be_inlined
: 1;
1080 /* This DIE has been marked DW_AT_main_subprogram. */
1081 unsigned int main_subprogram
: 1;
1083 /* Flag set if the SCOPE field of this structure has been
1085 unsigned int scope_set
: 1;
1087 /* Flag set if the DIE has a byte_size attribute. */
1088 unsigned int has_byte_size
: 1;
1090 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1091 unsigned int has_const_value
: 1;
1093 /* Flag set if any of the DIE's children are template arguments. */
1094 unsigned int has_template_arguments
: 1;
1096 /* Flag set if fixup has been called on this die. */
1097 unsigned int fixup_called
: 1;
1099 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1100 unsigned int is_dwz
: 1;
1102 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1103 unsigned int spec_is_dwz
: 1;
1105 /* The name of this DIE. Normally the value of DW_AT_name, but
1106 sometimes a default name for unnamed DIEs. */
1107 const char *name
= nullptr;
1109 /* The linkage name, if present. */
1110 const char *linkage_name
= nullptr;
1112 /* The scope to prepend to our children. This is generally
1113 allocated on the comp_unit_obstack, so will disappear
1114 when this compilation unit leaves the cache. */
1115 const char *scope
= nullptr;
1117 /* Some data associated with the partial DIE. The tag determines
1118 which field is live. */
1121 /* The location description associated with this DIE, if any. */
1122 struct dwarf_block
*locdesc
;
1123 /* The offset of an import, for DW_TAG_imported_unit. */
1124 sect_offset sect_off
;
1127 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1128 CORE_ADDR lowpc
= 0;
1129 CORE_ADDR highpc
= 0;
1131 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1132 DW_AT_sibling, if any. */
1133 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1134 could return DW_AT_sibling values to its caller load_partial_dies. */
1135 const gdb_byte
*sibling
= nullptr;
1137 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1138 DW_AT_specification (or DW_AT_abstract_origin or
1139 DW_AT_extension). */
1140 sect_offset spec_offset
{};
1142 /* Pointers to this DIE's parent, first child, and next sibling,
1144 struct partial_die_info
*die_parent
= nullptr;
1145 struct partial_die_info
*die_child
= nullptr;
1146 struct partial_die_info
*die_sibling
= nullptr;
1148 friend struct partial_die_info
*
1149 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1152 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1153 partial_die_info (sect_offset sect_off
)
1154 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1158 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1160 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1165 has_specification
= 0;
1168 main_subprogram
= 0;
1171 has_const_value
= 0;
1172 has_template_arguments
= 0;
1179 /* This data structure holds the information of an abbrev. */
1182 unsigned int number
; /* number identifying abbrev */
1183 enum dwarf_tag tag
; /* dwarf tag */
1184 unsigned short has_children
; /* boolean */
1185 unsigned short num_attrs
; /* number of attributes */
1186 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1187 struct abbrev_info
*next
; /* next in chain */
1192 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1193 ENUM_BITFIELD(dwarf_form
) form
: 16;
1195 /* It is valid only if FORM is DW_FORM_implicit_const. */
1196 LONGEST implicit_const
;
1199 /* Size of abbrev_table.abbrev_hash_table. */
1200 #define ABBREV_HASH_SIZE 121
1202 /* Top level data structure to contain an abbreviation table. */
1206 explicit abbrev_table (sect_offset off
)
1210 XOBNEWVEC (&abbrev_obstack
, struct abbrev_info
*, ABBREV_HASH_SIZE
);
1211 memset (m_abbrevs
, 0, ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
1214 DISABLE_COPY_AND_ASSIGN (abbrev_table
);
1216 /* Allocate space for a struct abbrev_info object in
1218 struct abbrev_info
*alloc_abbrev ();
1220 /* Add an abbreviation to the table. */
1221 void add_abbrev (unsigned int abbrev_number
, struct abbrev_info
*abbrev
);
1223 /* Look up an abbrev in the table.
1224 Returns NULL if the abbrev is not found. */
1226 struct abbrev_info
*lookup_abbrev (unsigned int abbrev_number
);
1229 /* Where the abbrev table came from.
1230 This is used as a sanity check when the table is used. */
1231 const sect_offset sect_off
;
1233 /* Storage for the abbrev table. */
1234 auto_obstack abbrev_obstack
;
1238 /* Hash table of abbrevs.
1239 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1240 It could be statically allocated, but the previous code didn't so we
1242 struct abbrev_info
**m_abbrevs
;
1245 typedef std::unique_ptr
<struct abbrev_table
> abbrev_table_up
;
1247 /* Attributes have a name and a value. */
1250 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1251 ENUM_BITFIELD(dwarf_form
) form
: 15;
1253 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1254 field should be in u.str (existing only for DW_STRING) but it is kept
1255 here for better struct attribute alignment. */
1256 unsigned int string_is_canonical
: 1;
1261 struct dwarf_block
*blk
;
1270 /* This data structure holds a complete die structure. */
1273 /* DWARF-2 tag for this DIE. */
1274 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1276 /* Number of attributes */
1277 unsigned char num_attrs
;
1279 /* True if we're presently building the full type name for the
1280 type derived from this DIE. */
1281 unsigned char building_fullname
: 1;
1283 /* True if this die is in process. PR 16581. */
1284 unsigned char in_process
: 1;
1287 unsigned int abbrev
;
1289 /* Offset in .debug_info or .debug_types section. */
1290 sect_offset sect_off
;
1292 /* The dies in a compilation unit form an n-ary tree. PARENT
1293 points to this die's parent; CHILD points to the first child of
1294 this node; and all the children of a given node are chained
1295 together via their SIBLING fields. */
1296 struct die_info
*child
; /* Its first child, if any. */
1297 struct die_info
*sibling
; /* Its next sibling, if any. */
1298 struct die_info
*parent
; /* Its parent, if any. */
1300 /* An array of attributes, with NUM_ATTRS elements. There may be
1301 zero, but it's not common and zero-sized arrays are not
1302 sufficiently portable C. */
1303 struct attribute attrs
[1];
1306 /* Get at parts of an attribute structure. */
1308 #define DW_STRING(attr) ((attr)->u.str)
1309 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1310 #define DW_UNSND(attr) ((attr)->u.unsnd)
1311 #define DW_BLOCK(attr) ((attr)->u.blk)
1312 #define DW_SND(attr) ((attr)->u.snd)
1313 #define DW_ADDR(attr) ((attr)->u.addr)
1314 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1316 /* Blocks are a bunch of untyped bytes. */
1321 /* Valid only if SIZE is not zero. */
1322 const gdb_byte
*data
;
1325 #ifndef ATTR_ALLOC_CHUNK
1326 #define ATTR_ALLOC_CHUNK 4
1329 /* Allocate fields for structs, unions and enums in this size. */
1330 #ifndef DW_FIELD_ALLOC_CHUNK
1331 #define DW_FIELD_ALLOC_CHUNK 4
1334 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1335 but this would require a corresponding change in unpack_field_as_long
1337 static int bits_per_byte
= 8;
1339 /* When reading a variant or variant part, we track a bit more
1340 information about the field, and store it in an object of this
1343 struct variant_field
1345 /* If we see a DW_TAG_variant, then this will be the discriminant
1347 ULONGEST discriminant_value
;
1348 /* If we see a DW_TAG_variant, then this will be set if this is the
1350 bool default_branch
;
1351 /* While reading a DW_TAG_variant_part, this will be set if this
1352 field is the discriminant. */
1353 bool is_discriminant
;
1358 int accessibility
= 0;
1360 /* Extra information to describe a variant or variant part. */
1361 struct variant_field variant
{};
1362 struct field field
{};
1367 const char *name
= nullptr;
1368 std::vector
<struct fn_field
> fnfields
;
1371 /* The routines that read and process dies for a C struct or C++ class
1372 pass lists of data member fields and lists of member function fields
1373 in an instance of a field_info structure, as defined below. */
1376 /* List of data member and baseclasses fields. */
1377 std::vector
<struct nextfield
> fields
;
1378 std::vector
<struct nextfield
> baseclasses
;
1380 /* Number of fields (including baseclasses). */
1383 /* Set if the accesibility of one of the fields is not public. */
1384 int non_public_fields
= 0;
1386 /* Member function fieldlist array, contains name of possibly overloaded
1387 member function, number of overloaded member functions and a pointer
1388 to the head of the member function field chain. */
1389 std::vector
<struct fnfieldlist
> fnfieldlists
;
1391 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1392 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1393 std::vector
<struct decl_field
> typedef_field_list
;
1395 /* Nested types defined by this class and the number of elements in this
1397 std::vector
<struct decl_field
> nested_types_list
;
1400 /* One item on the queue of compilation units to read in full symbols
1402 struct dwarf2_queue_item
1404 struct dwarf2_per_cu_data
*per_cu
;
1405 enum language pretend_language
;
1406 struct dwarf2_queue_item
*next
;
1409 /* The current queue. */
1410 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1412 /* Loaded secondary compilation units are kept in memory until they
1413 have not been referenced for the processing of this many
1414 compilation units. Set this to zero to disable caching. Cache
1415 sizes of up to at least twenty will improve startup time for
1416 typical inter-CU-reference binaries, at an obvious memory cost. */
1417 static int dwarf_max_cache_age
= 5;
1419 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1420 struct cmd_list_element
*c
, const char *value
)
1422 fprintf_filtered (file
, _("The upper bound on the age of cached "
1423 "DWARF compilation units is %s.\n"),
1427 /* local function prototypes */
1429 static const char *get_section_name (const struct dwarf2_section_info
*);
1431 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1433 static void dwarf2_find_base_address (struct die_info
*die
,
1434 struct dwarf2_cu
*cu
);
1436 static struct partial_symtab
*create_partial_symtab
1437 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1439 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1440 const gdb_byte
*info_ptr
,
1441 struct die_info
*type_unit_die
,
1442 int has_children
, void *data
);
1444 static void dwarf2_build_psymtabs_hard
1445 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1447 static void scan_partial_symbols (struct partial_die_info
*,
1448 CORE_ADDR
*, CORE_ADDR
*,
1449 int, struct dwarf2_cu
*);
1451 static void add_partial_symbol (struct partial_die_info
*,
1452 struct dwarf2_cu
*);
1454 static void add_partial_namespace (struct partial_die_info
*pdi
,
1455 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1456 int set_addrmap
, struct dwarf2_cu
*cu
);
1458 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1459 CORE_ADDR
*highpc
, int set_addrmap
,
1460 struct dwarf2_cu
*cu
);
1462 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1463 struct dwarf2_cu
*cu
);
1465 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1466 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1467 int need_pc
, struct dwarf2_cu
*cu
);
1469 static void dwarf2_read_symtab (struct partial_symtab
*,
1472 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1474 static abbrev_table_up abbrev_table_read_table
1475 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, struct dwarf2_section_info
*,
1478 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1480 static struct partial_die_info
*load_partial_dies
1481 (const struct die_reader_specs
*, const gdb_byte
*, int);
1483 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1484 struct dwarf2_cu
*);
1486 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1487 struct attribute
*, struct attr_abbrev
*,
1490 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1492 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1494 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1496 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1498 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1500 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1503 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1505 static LONGEST read_checked_initial_length_and_offset
1506 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1507 unsigned int *, unsigned int *);
1509 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1510 const struct comp_unit_head
*,
1513 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1515 static sect_offset read_abbrev_offset
1516 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1517 struct dwarf2_section_info
*, sect_offset
);
1519 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1521 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1523 static const char *read_indirect_string
1524 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1525 const struct comp_unit_head
*, unsigned int *);
1527 static const char *read_indirect_line_string
1528 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1529 const struct comp_unit_head
*, unsigned int *);
1531 static const char *read_indirect_string_at_offset
1532 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
1533 LONGEST str_offset
);
1535 static const char *read_indirect_string_from_dwz
1536 (struct objfile
*objfile
, struct dwz_file
*, LONGEST
);
1538 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1540 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1544 static const char *read_str_index (const struct die_reader_specs
*reader
,
1545 ULONGEST str_index
);
1547 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1549 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1550 struct dwarf2_cu
*);
1552 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1555 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1556 struct dwarf2_cu
*cu
);
1558 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1559 struct dwarf2_cu
*cu
);
1561 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1563 static struct die_info
*die_specification (struct die_info
*die
,
1564 struct dwarf2_cu
**);
1566 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1567 struct dwarf2_cu
*cu
);
1569 static void dwarf_decode_lines (struct line_header
*, const char *,
1570 struct dwarf2_cu
*, struct partial_symtab
*,
1571 CORE_ADDR
, int decode_mapping
);
1573 static void dwarf2_start_subfile (const char *, const char *);
1575 static struct compunit_symtab
*dwarf2_start_symtab (struct dwarf2_cu
*,
1576 const char *, const char *,
1579 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1580 struct dwarf2_cu
*, struct symbol
* = NULL
);
1582 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1583 struct dwarf2_cu
*);
1585 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1588 struct obstack
*obstack
,
1589 struct dwarf2_cu
*cu
, LONGEST
*value
,
1590 const gdb_byte
**bytes
,
1591 struct dwarf2_locexpr_baton
**baton
);
1593 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1595 static int need_gnat_info (struct dwarf2_cu
*);
1597 static struct type
*die_descriptive_type (struct die_info
*,
1598 struct dwarf2_cu
*);
1600 static void set_descriptive_type (struct type
*, struct die_info
*,
1601 struct dwarf2_cu
*);
1603 static struct type
*die_containing_type (struct die_info
*,
1604 struct dwarf2_cu
*);
1606 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1607 struct dwarf2_cu
*);
1609 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1611 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1613 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1615 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1616 const char *suffix
, int physname
,
1617 struct dwarf2_cu
*cu
);
1619 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1621 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1623 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1625 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1627 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1629 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1631 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1632 struct dwarf2_cu
*, struct partial_symtab
*);
1634 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1635 values. Keep the items ordered with increasing constraints compliance. */
1638 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1639 PC_BOUNDS_NOT_PRESENT
,
1641 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1642 were present but they do not form a valid range of PC addresses. */
1645 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1648 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1652 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1653 CORE_ADDR
*, CORE_ADDR
*,
1655 struct partial_symtab
*);
1657 static void get_scope_pc_bounds (struct die_info
*,
1658 CORE_ADDR
*, CORE_ADDR
*,
1659 struct dwarf2_cu
*);
1661 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1662 CORE_ADDR
, struct dwarf2_cu
*);
1664 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1665 struct dwarf2_cu
*);
1667 static void dwarf2_attach_fields_to_type (struct field_info
*,
1668 struct type
*, struct dwarf2_cu
*);
1670 static void dwarf2_add_member_fn (struct field_info
*,
1671 struct die_info
*, struct type
*,
1672 struct dwarf2_cu
*);
1674 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1676 struct dwarf2_cu
*);
1678 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1680 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1682 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1684 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1686 static struct using_direct
**using_directives (enum language
);
1688 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1690 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1692 static struct type
*read_module_type (struct die_info
*die
,
1693 struct dwarf2_cu
*cu
);
1695 static const char *namespace_name (struct die_info
*die
,
1696 int *is_anonymous
, struct dwarf2_cu
*);
1698 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1700 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1702 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1703 struct dwarf2_cu
*);
1705 static struct die_info
*read_die_and_siblings_1
1706 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1709 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1710 const gdb_byte
*info_ptr
,
1711 const gdb_byte
**new_info_ptr
,
1712 struct die_info
*parent
);
1714 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1715 struct die_info
**, const gdb_byte
*,
1718 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1719 struct die_info
**, const gdb_byte
*,
1722 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1724 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1727 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1729 static const char *dwarf2_full_name (const char *name
,
1730 struct die_info
*die
,
1731 struct dwarf2_cu
*cu
);
1733 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1734 struct dwarf2_cu
*cu
);
1736 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1737 struct dwarf2_cu
**);
1739 static const char *dwarf_tag_name (unsigned int);
1741 static const char *dwarf_attr_name (unsigned int);
1743 static const char *dwarf_form_name (unsigned int);
1745 static const char *dwarf_bool_name (unsigned int);
1747 static const char *dwarf_type_encoding_name (unsigned int);
1749 static struct die_info
*sibling_die (struct die_info
*);
1751 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1753 static void dump_die_for_error (struct die_info
*);
1755 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1758 /*static*/ void dump_die (struct die_info
*, int max_level
);
1760 static void store_in_ref_table (struct die_info
*,
1761 struct dwarf2_cu
*);
1763 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1765 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1767 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1768 const struct attribute
*,
1769 struct dwarf2_cu
**);
1771 static struct die_info
*follow_die_ref (struct die_info
*,
1772 const struct attribute
*,
1773 struct dwarf2_cu
**);
1775 static struct die_info
*follow_die_sig (struct die_info
*,
1776 const struct attribute
*,
1777 struct dwarf2_cu
**);
1779 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1780 struct dwarf2_cu
*);
1782 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1783 const struct attribute
*,
1784 struct dwarf2_cu
*);
1786 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1788 static void read_signatured_type (struct signatured_type
*);
1790 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1791 struct die_info
*die
, struct dwarf2_cu
*cu
,
1792 struct dynamic_prop
*prop
);
1794 /* memory allocation interface */
1796 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1798 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1800 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1802 static int attr_form_is_block (const struct attribute
*);
1804 static int attr_form_is_section_offset (const struct attribute
*);
1806 static int attr_form_is_constant (const struct attribute
*);
1808 static int attr_form_is_ref (const struct attribute
*);
1810 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1811 struct dwarf2_loclist_baton
*baton
,
1812 const struct attribute
*attr
);
1814 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1816 struct dwarf2_cu
*cu
,
1819 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1820 const gdb_byte
*info_ptr
,
1821 struct abbrev_info
*abbrev
);
1823 static hashval_t
partial_die_hash (const void *item
);
1825 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1827 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1828 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1829 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1831 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1832 struct die_info
*comp_unit_die
,
1833 enum language pretend_language
);
1835 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1837 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1839 static struct type
*set_die_type (struct die_info
*, struct type
*,
1840 struct dwarf2_cu
*);
1842 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1844 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1846 static void load_full_comp_unit (struct dwarf2_per_cu_data
*, bool,
1849 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1852 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1855 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1856 struct dwarf2_per_cu_data
*);
1858 static void dwarf2_mark (struct dwarf2_cu
*);
1860 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1862 static struct type
*get_die_type_at_offset (sect_offset
,
1863 struct dwarf2_per_cu_data
*);
1865 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1867 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1868 enum language pretend_language
);
1870 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1872 /* Class, the destructor of which frees all allocated queue entries. This
1873 will only have work to do if an error was thrown while processing the
1874 dwarf. If no error was thrown then the queue entries should have all
1875 been processed, and freed, as we went along. */
1877 class dwarf2_queue_guard
1880 dwarf2_queue_guard () = default;
1882 /* Free any entries remaining on the queue. There should only be
1883 entries left if we hit an error while processing the dwarf. */
1884 ~dwarf2_queue_guard ()
1886 struct dwarf2_queue_item
*item
, *last
;
1888 item
= dwarf2_queue
;
1891 /* Anything still marked queued is likely to be in an
1892 inconsistent state, so discard it. */
1893 if (item
->per_cu
->queued
)
1895 if (item
->per_cu
->cu
!= NULL
)
1896 free_one_cached_comp_unit (item
->per_cu
);
1897 item
->per_cu
->queued
= 0;
1905 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
1909 /* The return type of find_file_and_directory. Note, the enclosed
1910 string pointers are only valid while this object is valid. */
1912 struct file_and_directory
1914 /* The filename. This is never NULL. */
1917 /* The compilation directory. NULL if not known. If we needed to
1918 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1919 points directly to the DW_AT_comp_dir string attribute owned by
1920 the obstack that owns the DIE. */
1921 const char *comp_dir
;
1923 /* If we needed to build a new string for comp_dir, this is what
1924 owns the storage. */
1925 std::string comp_dir_storage
;
1928 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1929 struct dwarf2_cu
*cu
);
1931 static char *file_full_name (int file
, struct line_header
*lh
,
1932 const char *comp_dir
);
1934 /* Expected enum dwarf_unit_type for read_comp_unit_head. */
1935 enum class rcuh_kind
{ COMPILE
, TYPE
};
1937 static const gdb_byte
*read_and_check_comp_unit_head
1938 (struct dwarf2_per_objfile
* dwarf2_per_objfile
,
1939 struct comp_unit_head
*header
,
1940 struct dwarf2_section_info
*section
,
1941 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1942 rcuh_kind section_kind
);
1944 static void init_cutu_and_read_dies
1945 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1946 int use_existing_cu
, int keep
, bool skip_partial
,
1947 die_reader_func_ftype
*die_reader_func
, void *data
);
1949 static void init_cutu_and_read_dies_simple
1950 (struct dwarf2_per_cu_data
*this_cu
,
1951 die_reader_func_ftype
*die_reader_func
, void *data
);
1953 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1955 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1957 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1958 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1959 struct dwp_file
*dwp_file
, const char *comp_dir
,
1960 ULONGEST signature
, int is_debug_types
);
1962 static struct dwp_file
*get_dwp_file
1963 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1965 static struct dwo_unit
*lookup_dwo_comp_unit
1966 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1968 static struct dwo_unit
*lookup_dwo_type_unit
1969 (struct signatured_type
*, const char *, const char *);
1971 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1973 static void free_dwo_file (struct dwo_file
*);
1975 /* A unique_ptr helper to free a dwo_file. */
1977 struct dwo_file_deleter
1979 void operator() (struct dwo_file
*df
) const
1985 /* A unique pointer to a dwo_file. */
1987 typedef std::unique_ptr
<struct dwo_file
, dwo_file_deleter
> dwo_file_up
;
1989 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1991 static void check_producer (struct dwarf2_cu
*cu
);
1993 static void free_line_header_voidp (void *arg
);
1995 /* Various complaints about symbol reading that don't abort the process. */
1998 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
2000 complaint (&symfile_complaints
,
2001 _("statement list doesn't fit in .debug_line section"));
2005 dwarf2_debug_line_missing_file_complaint (void)
2007 complaint (&symfile_complaints
,
2008 _(".debug_line section has line data without a file"));
2012 dwarf2_debug_line_missing_end_sequence_complaint (void)
2014 complaint (&symfile_complaints
,
2015 _(".debug_line section has line "
2016 "program sequence without an end"));
2020 dwarf2_complex_location_expr_complaint (void)
2022 complaint (&symfile_complaints
, _("location expression too complex"));
2026 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
2029 complaint (&symfile_complaints
,
2030 _("const value length mismatch for '%s', got %d, expected %d"),
2035 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
2037 complaint (&symfile_complaints
,
2038 _("debug info runs off end of %s section"
2040 get_section_name (section
),
2041 get_section_file_name (section
));
2045 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
2047 complaint (&symfile_complaints
,
2048 _("macro debug info contains a "
2049 "malformed macro definition:\n`%s'"),
2054 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
2056 complaint (&symfile_complaints
,
2057 _("invalid attribute class or form for '%s' in '%s'"),
2061 /* Hash function for line_header_hash. */
2064 line_header_hash (const struct line_header
*ofs
)
2066 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
2069 /* Hash function for htab_create_alloc_ex for line_header_hash. */
2072 line_header_hash_voidp (const void *item
)
2074 const struct line_header
*ofs
= (const struct line_header
*) item
;
2076 return line_header_hash (ofs
);
2079 /* Equality function for line_header_hash. */
2082 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
2084 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
2085 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
2087 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
2088 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
2093 /* Read the given attribute value as an address, taking the attribute's
2094 form into account. */
2097 attr_value_as_address (struct attribute
*attr
)
2101 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
2103 /* Aside from a few clearly defined exceptions, attributes that
2104 contain an address must always be in DW_FORM_addr form.
2105 Unfortunately, some compilers happen to be violating this
2106 requirement by encoding addresses using other forms, such
2107 as DW_FORM_data4 for example. For those broken compilers,
2108 we try to do our best, without any guarantee of success,
2109 to interpret the address correctly. It would also be nice
2110 to generate a complaint, but that would require us to maintain
2111 a list of legitimate cases where a non-address form is allowed,
2112 as well as update callers to pass in at least the CU's DWARF
2113 version. This is more overhead than what we're willing to
2114 expand for a pretty rare case. */
2115 addr
= DW_UNSND (attr
);
2118 addr
= DW_ADDR (attr
);
2123 /* See declaration. */
2125 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
2126 const dwarf2_debug_sections
*names
)
2127 : objfile (objfile_
)
2130 names
= &dwarf2_elf_names
;
2132 bfd
*obfd
= objfile
->obfd
;
2134 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2135 locate_sections (obfd
, sec
, *names
);
2138 static void free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
);
2140 dwarf2_per_objfile::~dwarf2_per_objfile ()
2142 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
2143 free_cached_comp_units ();
2145 if (quick_file_names_table
)
2146 htab_delete (quick_file_names_table
);
2148 if (line_header_hash
)
2149 htab_delete (line_header_hash
);
2151 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
2152 VEC_free (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
);
2154 for (signatured_type
*sig_type
: all_type_units
)
2155 VEC_free (dwarf2_per_cu_ptr
, sig_type
->per_cu
.imported_symtabs
);
2157 VEC_free (dwarf2_section_info_def
, types
);
2159 if (dwo_files
!= NULL
)
2160 free_dwo_files (dwo_files
, objfile
);
2162 /* Everything else should be on the objfile obstack. */
2165 /* See declaration. */
2168 dwarf2_per_objfile::free_cached_comp_units ()
2170 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
2171 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
2172 while (per_cu
!= NULL
)
2174 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
2177 *last_chain
= next_cu
;
2182 /* A helper class that calls free_cached_comp_units on
2185 class free_cached_comp_units
2189 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
2190 : m_per_objfile (per_objfile
)
2194 ~free_cached_comp_units ()
2196 m_per_objfile
->free_cached_comp_units ();
2199 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
2203 dwarf2_per_objfile
*m_per_objfile
;
2206 /* Try to locate the sections we need for DWARF 2 debugging
2207 information and return true if we have enough to do something.
2208 NAMES points to the dwarf2 section names, or is NULL if the standard
2209 ELF names are used. */
2212 dwarf2_has_info (struct objfile
*objfile
,
2213 const struct dwarf2_debug_sections
*names
)
2215 if (objfile
->flags
& OBJF_READNEVER
)
2218 struct dwarf2_per_objfile
*dwarf2_per_objfile
2219 = get_dwarf2_per_objfile (objfile
);
2221 if (dwarf2_per_objfile
== NULL
)
2223 /* Initialize per-objfile state. */
2225 = new (&objfile
->objfile_obstack
) struct dwarf2_per_objfile (objfile
,
2227 set_dwarf2_per_objfile (objfile
, dwarf2_per_objfile
);
2229 return (!dwarf2_per_objfile
->info
.is_virtual
2230 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2231 && !dwarf2_per_objfile
->abbrev
.is_virtual
2232 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2235 /* Return the containing section of virtual section SECTION. */
2237 static struct dwarf2_section_info
*
2238 get_containing_section (const struct dwarf2_section_info
*section
)
2240 gdb_assert (section
->is_virtual
);
2241 return section
->s
.containing_section
;
2244 /* Return the bfd owner of SECTION. */
2247 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2249 if (section
->is_virtual
)
2251 section
= get_containing_section (section
);
2252 gdb_assert (!section
->is_virtual
);
2254 return section
->s
.section
->owner
;
2257 /* Return the bfd section of SECTION.
2258 Returns NULL if the section is not present. */
2261 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2263 if (section
->is_virtual
)
2265 section
= get_containing_section (section
);
2266 gdb_assert (!section
->is_virtual
);
2268 return section
->s
.section
;
2271 /* Return the name of SECTION. */
2274 get_section_name (const struct dwarf2_section_info
*section
)
2276 asection
*sectp
= get_section_bfd_section (section
);
2278 gdb_assert (sectp
!= NULL
);
2279 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2282 /* Return the name of the file SECTION is in. */
2285 get_section_file_name (const struct dwarf2_section_info
*section
)
2287 bfd
*abfd
= get_section_bfd_owner (section
);
2289 return bfd_get_filename (abfd
);
2292 /* Return the id of SECTION.
2293 Returns 0 if SECTION doesn't exist. */
2296 get_section_id (const struct dwarf2_section_info
*section
)
2298 asection
*sectp
= get_section_bfd_section (section
);
2305 /* Return the flags of SECTION.
2306 SECTION (or containing section if this is a virtual section) must exist. */
2309 get_section_flags (const struct dwarf2_section_info
*section
)
2311 asection
*sectp
= get_section_bfd_section (section
);
2313 gdb_assert (sectp
!= NULL
);
2314 return bfd_get_section_flags (sectp
->owner
, sectp
);
2317 /* When loading sections, we look either for uncompressed section or for
2318 compressed section names. */
2321 section_is_p (const char *section_name
,
2322 const struct dwarf2_section_names
*names
)
2324 if (names
->normal
!= NULL
2325 && strcmp (section_name
, names
->normal
) == 0)
2327 if (names
->compressed
!= NULL
2328 && strcmp (section_name
, names
->compressed
) == 0)
2333 /* See declaration. */
2336 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
2337 const dwarf2_debug_sections
&names
)
2339 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2341 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2344 else if (section_is_p (sectp
->name
, &names
.info
))
2346 this->info
.s
.section
= sectp
;
2347 this->info
.size
= bfd_get_section_size (sectp
);
2349 else if (section_is_p (sectp
->name
, &names
.abbrev
))
2351 this->abbrev
.s
.section
= sectp
;
2352 this->abbrev
.size
= bfd_get_section_size (sectp
);
2354 else if (section_is_p (sectp
->name
, &names
.line
))
2356 this->line
.s
.section
= sectp
;
2357 this->line
.size
= bfd_get_section_size (sectp
);
2359 else if (section_is_p (sectp
->name
, &names
.loc
))
2361 this->loc
.s
.section
= sectp
;
2362 this->loc
.size
= bfd_get_section_size (sectp
);
2364 else if (section_is_p (sectp
->name
, &names
.loclists
))
2366 this->loclists
.s
.section
= sectp
;
2367 this->loclists
.size
= bfd_get_section_size (sectp
);
2369 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2371 this->macinfo
.s
.section
= sectp
;
2372 this->macinfo
.size
= bfd_get_section_size (sectp
);
2374 else if (section_is_p (sectp
->name
, &names
.macro
))
2376 this->macro
.s
.section
= sectp
;
2377 this->macro
.size
= bfd_get_section_size (sectp
);
2379 else if (section_is_p (sectp
->name
, &names
.str
))
2381 this->str
.s
.section
= sectp
;
2382 this->str
.size
= bfd_get_section_size (sectp
);
2384 else if (section_is_p (sectp
->name
, &names
.line_str
))
2386 this->line_str
.s
.section
= sectp
;
2387 this->line_str
.size
= bfd_get_section_size (sectp
);
2389 else if (section_is_p (sectp
->name
, &names
.addr
))
2391 this->addr
.s
.section
= sectp
;
2392 this->addr
.size
= bfd_get_section_size (sectp
);
2394 else if (section_is_p (sectp
->name
, &names
.frame
))
2396 this->frame
.s
.section
= sectp
;
2397 this->frame
.size
= bfd_get_section_size (sectp
);
2399 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2401 this->eh_frame
.s
.section
= sectp
;
2402 this->eh_frame
.size
= bfd_get_section_size (sectp
);
2404 else if (section_is_p (sectp
->name
, &names
.ranges
))
2406 this->ranges
.s
.section
= sectp
;
2407 this->ranges
.size
= bfd_get_section_size (sectp
);
2409 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2411 this->rnglists
.s
.section
= sectp
;
2412 this->rnglists
.size
= bfd_get_section_size (sectp
);
2414 else if (section_is_p (sectp
->name
, &names
.types
))
2416 struct dwarf2_section_info type_section
;
2418 memset (&type_section
, 0, sizeof (type_section
));
2419 type_section
.s
.section
= sectp
;
2420 type_section
.size
= bfd_get_section_size (sectp
);
2422 VEC_safe_push (dwarf2_section_info_def
, this->types
,
2425 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2427 this->gdb_index
.s
.section
= sectp
;
2428 this->gdb_index
.size
= bfd_get_section_size (sectp
);
2430 else if (section_is_p (sectp
->name
, &names
.debug_names
))
2432 this->debug_names
.s
.section
= sectp
;
2433 this->debug_names
.size
= bfd_get_section_size (sectp
);
2435 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
2437 this->debug_aranges
.s
.section
= sectp
;
2438 this->debug_aranges
.size
= bfd_get_section_size (sectp
);
2441 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2442 && bfd_section_vma (abfd
, sectp
) == 0)
2443 this->has_section_at_zero
= true;
2446 /* A helper function that decides whether a section is empty,
2450 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2452 if (section
->is_virtual
)
2453 return section
->size
== 0;
2454 return section
->s
.section
== NULL
|| section
->size
== 0;
2457 /* See dwarf2read.h. */
2460 dwarf2_read_section (struct objfile
*objfile
, dwarf2_section_info
*info
)
2464 gdb_byte
*buf
, *retbuf
;
2468 info
->buffer
= NULL
;
2471 if (dwarf2_section_empty_p (info
))
2474 sectp
= get_section_bfd_section (info
);
2476 /* If this is a virtual section we need to read in the real one first. */
2477 if (info
->is_virtual
)
2479 struct dwarf2_section_info
*containing_section
=
2480 get_containing_section (info
);
2482 gdb_assert (sectp
!= NULL
);
2483 if ((sectp
->flags
& SEC_RELOC
) != 0)
2485 error (_("Dwarf Error: DWP format V2 with relocations is not"
2486 " supported in section %s [in module %s]"),
2487 get_section_name (info
), get_section_file_name (info
));
2489 dwarf2_read_section (objfile
, containing_section
);
2490 /* Other code should have already caught virtual sections that don't
2492 gdb_assert (info
->virtual_offset
+ info
->size
2493 <= containing_section
->size
);
2494 /* If the real section is empty or there was a problem reading the
2495 section we shouldn't get here. */
2496 gdb_assert (containing_section
->buffer
!= NULL
);
2497 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2501 /* If the section has relocations, we must read it ourselves.
2502 Otherwise we attach it to the BFD. */
2503 if ((sectp
->flags
& SEC_RELOC
) == 0)
2505 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2509 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2512 /* When debugging .o files, we may need to apply relocations; see
2513 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2514 We never compress sections in .o files, so we only need to
2515 try this when the section is not compressed. */
2516 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2519 info
->buffer
= retbuf
;
2523 abfd
= get_section_bfd_owner (info
);
2524 gdb_assert (abfd
!= NULL
);
2526 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2527 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2529 error (_("Dwarf Error: Can't read DWARF data"
2530 " in section %s [in module %s]"),
2531 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2535 /* A helper function that returns the size of a section in a safe way.
2536 If you are positive that the section has been read before using the
2537 size, then it is safe to refer to the dwarf2_section_info object's
2538 "size" field directly. In other cases, you must call this
2539 function, because for compressed sections the size field is not set
2540 correctly until the section has been read. */
2542 static bfd_size_type
2543 dwarf2_section_size (struct objfile
*objfile
,
2544 struct dwarf2_section_info
*info
)
2547 dwarf2_read_section (objfile
, info
);
2551 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2555 dwarf2_get_section_info (struct objfile
*objfile
,
2556 enum dwarf2_section_enum sect
,
2557 asection
**sectp
, const gdb_byte
**bufp
,
2558 bfd_size_type
*sizep
)
2560 struct dwarf2_per_objfile
*data
2561 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
2562 dwarf2_objfile_data_key
);
2563 struct dwarf2_section_info
*info
;
2565 /* We may see an objfile without any DWARF, in which case we just
2576 case DWARF2_DEBUG_FRAME
:
2577 info
= &data
->frame
;
2579 case DWARF2_EH_FRAME
:
2580 info
= &data
->eh_frame
;
2583 gdb_assert_not_reached ("unexpected section");
2586 dwarf2_read_section (objfile
, info
);
2588 *sectp
= get_section_bfd_section (info
);
2589 *bufp
= info
->buffer
;
2590 *sizep
= info
->size
;
2593 /* A helper function to find the sections for a .dwz file. */
2596 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2598 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2600 /* Note that we only support the standard ELF names, because .dwz
2601 is ELF-only (at the time of writing). */
2602 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2604 dwz_file
->abbrev
.s
.section
= sectp
;
2605 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2607 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2609 dwz_file
->info
.s
.section
= sectp
;
2610 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2612 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2614 dwz_file
->str
.s
.section
= sectp
;
2615 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2617 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2619 dwz_file
->line
.s
.section
= sectp
;
2620 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2622 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2624 dwz_file
->macro
.s
.section
= sectp
;
2625 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2627 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2629 dwz_file
->gdb_index
.s
.section
= sectp
;
2630 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2632 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2634 dwz_file
->debug_names
.s
.section
= sectp
;
2635 dwz_file
->debug_names
.size
= bfd_get_section_size (sectp
);
2639 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2640 there is no .gnu_debugaltlink section in the file. Error if there
2641 is such a section but the file cannot be found. */
2643 static struct dwz_file
*
2644 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2646 const char *filename
;
2647 bfd_size_type buildid_len_arg
;
2651 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2652 return dwarf2_per_objfile
->dwz_file
.get ();
2654 bfd_set_error (bfd_error_no_error
);
2655 gdb::unique_xmalloc_ptr
<char> data
2656 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2657 &buildid_len_arg
, &buildid
));
2660 if (bfd_get_error () == bfd_error_no_error
)
2662 error (_("could not read '.gnu_debugaltlink' section: %s"),
2663 bfd_errmsg (bfd_get_error ()));
2666 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2668 buildid_len
= (size_t) buildid_len_arg
;
2670 filename
= data
.get ();
2672 std::string abs_storage
;
2673 if (!IS_ABSOLUTE_PATH (filename
))
2675 gdb::unique_xmalloc_ptr
<char> abs
2676 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2678 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2679 filename
= abs_storage
.c_str ();
2682 /* First try the file name given in the section. If that doesn't
2683 work, try to use the build-id instead. */
2684 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2685 if (dwz_bfd
!= NULL
)
2687 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2691 if (dwz_bfd
== NULL
)
2692 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2694 if (dwz_bfd
== NULL
)
2695 error (_("could not find '.gnu_debugaltlink' file for %s"),
2696 objfile_name (dwarf2_per_objfile
->objfile
));
2698 std::unique_ptr
<struct dwz_file
> result
2699 (new struct dwz_file (std::move (dwz_bfd
)));
2701 bfd_map_over_sections (result
->dwz_bfd
.get (), locate_dwz_sections
,
2704 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
,
2705 result
->dwz_bfd
.get ());
2706 dwarf2_per_objfile
->dwz_file
= std::move (result
);
2707 return dwarf2_per_objfile
->dwz_file
.get ();
2710 /* DWARF quick_symbols_functions support. */
2712 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2713 unique line tables, so we maintain a separate table of all .debug_line
2714 derived entries to support the sharing.
2715 All the quick functions need is the list of file names. We discard the
2716 line_header when we're done and don't need to record it here. */
2717 struct quick_file_names
2719 /* The data used to construct the hash key. */
2720 struct stmt_list_hash hash
;
2722 /* The number of entries in file_names, real_names. */
2723 unsigned int num_file_names
;
2725 /* The file names from the line table, after being run through
2727 const char **file_names
;
2729 /* The file names from the line table after being run through
2730 gdb_realpath. These are computed lazily. */
2731 const char **real_names
;
2734 /* When using the index (and thus not using psymtabs), each CU has an
2735 object of this type. This is used to hold information needed by
2736 the various "quick" methods. */
2737 struct dwarf2_per_cu_quick_data
2739 /* The file table. This can be NULL if there was no file table
2740 or it's currently not read in.
2741 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2742 struct quick_file_names
*file_names
;
2744 /* The corresponding symbol table. This is NULL if symbols for this
2745 CU have not yet been read. */
2746 struct compunit_symtab
*compunit_symtab
;
2748 /* A temporary mark bit used when iterating over all CUs in
2749 expand_symtabs_matching. */
2750 unsigned int mark
: 1;
2752 /* True if we've tried to read the file table and found there isn't one.
2753 There will be no point in trying to read it again next time. */
2754 unsigned int no_file_data
: 1;
2757 /* Utility hash function for a stmt_list_hash. */
2760 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2764 if (stmt_list_hash
->dwo_unit
!= NULL
)
2765 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2766 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2770 /* Utility equality function for a stmt_list_hash. */
2773 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2774 const struct stmt_list_hash
*rhs
)
2776 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2778 if (lhs
->dwo_unit
!= NULL
2779 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2782 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2785 /* Hash function for a quick_file_names. */
2788 hash_file_name_entry (const void *e
)
2790 const struct quick_file_names
*file_data
2791 = (const struct quick_file_names
*) e
;
2793 return hash_stmt_list_entry (&file_data
->hash
);
2796 /* Equality function for a quick_file_names. */
2799 eq_file_name_entry (const void *a
, const void *b
)
2801 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2802 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2804 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2807 /* Delete function for a quick_file_names. */
2810 delete_file_name_entry (void *e
)
2812 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2815 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2817 xfree ((void*) file_data
->file_names
[i
]);
2818 if (file_data
->real_names
)
2819 xfree ((void*) file_data
->real_names
[i
]);
2822 /* The space for the struct itself lives on objfile_obstack,
2823 so we don't free it here. */
2826 /* Create a quick_file_names hash table. */
2829 create_quick_file_names_table (unsigned int nr_initial_entries
)
2831 return htab_create_alloc (nr_initial_entries
,
2832 hash_file_name_entry
, eq_file_name_entry
,
2833 delete_file_name_entry
, xcalloc
, xfree
);
2836 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2837 have to be created afterwards. You should call age_cached_comp_units after
2838 processing PER_CU->CU. dw2_setup must have been already called. */
2841 load_cu (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2843 if (per_cu
->is_debug_types
)
2844 load_full_type_unit (per_cu
);
2846 load_full_comp_unit (per_cu
, skip_partial
, language_minimal
);
2848 if (per_cu
->cu
== NULL
)
2849 return; /* Dummy CU. */
2851 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2854 /* Read in the symbols for PER_CU. */
2857 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2859 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2861 /* Skip type_unit_groups, reading the type units they contain
2862 is handled elsewhere. */
2863 if (IS_TYPE_UNIT_GROUP (per_cu
))
2866 /* The destructor of dwarf2_queue_guard frees any entries left on
2867 the queue. After this point we're guaranteed to leave this function
2868 with the dwarf queue empty. */
2869 dwarf2_queue_guard q_guard
;
2871 if (dwarf2_per_objfile
->using_index
2872 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2873 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2875 queue_comp_unit (per_cu
, language_minimal
);
2876 load_cu (per_cu
, skip_partial
);
2878 /* If we just loaded a CU from a DWO, and we're working with an index
2879 that may badly handle TUs, load all the TUs in that DWO as well.
2880 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2881 if (!per_cu
->is_debug_types
2882 && per_cu
->cu
!= NULL
2883 && per_cu
->cu
->dwo_unit
!= NULL
2884 && dwarf2_per_objfile
->index_table
!= NULL
2885 && dwarf2_per_objfile
->index_table
->version
<= 7
2886 /* DWP files aren't supported yet. */
2887 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2888 queue_and_load_all_dwo_tus (per_cu
);
2891 process_queue (dwarf2_per_objfile
);
2893 /* Age the cache, releasing compilation units that have not
2894 been used recently. */
2895 age_cached_comp_units (dwarf2_per_objfile
);
2898 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2899 the objfile from which this CU came. Returns the resulting symbol
2902 static struct compunit_symtab
*
2903 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2905 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2907 gdb_assert (dwarf2_per_objfile
->using_index
);
2908 if (!per_cu
->v
.quick
->compunit_symtab
)
2910 free_cached_comp_units
freer (dwarf2_per_objfile
);
2911 scoped_restore decrementer
= increment_reading_symtab ();
2912 dw2_do_instantiate_symtab (per_cu
, skip_partial
);
2913 process_cu_includes (dwarf2_per_objfile
);
2916 return per_cu
->v
.quick
->compunit_symtab
;
2919 /* See declaration. */
2921 dwarf2_per_cu_data
*
2922 dwarf2_per_objfile::get_cutu (int index
)
2924 if (index
>= this->all_comp_units
.size ())
2926 index
-= this->all_comp_units
.size ();
2927 gdb_assert (index
< this->all_type_units
.size ());
2928 return &this->all_type_units
[index
]->per_cu
;
2931 return this->all_comp_units
[index
];
2934 /* See declaration. */
2936 dwarf2_per_cu_data
*
2937 dwarf2_per_objfile::get_cu (int index
)
2939 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2941 return this->all_comp_units
[index
];
2944 /* See declaration. */
2947 dwarf2_per_objfile::get_tu (int index
)
2949 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2951 return this->all_type_units
[index
];
2954 /* Return a new dwarf2_per_cu_data allocated on OBJFILE's
2955 objfile_obstack, and constructed with the specified field
2958 static dwarf2_per_cu_data
*
2959 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2960 struct dwarf2_section_info
*section
,
2962 sect_offset sect_off
, ULONGEST length
)
2964 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2965 dwarf2_per_cu_data
*the_cu
2966 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2967 struct dwarf2_per_cu_data
);
2968 the_cu
->sect_off
= sect_off
;
2969 the_cu
->length
= length
;
2970 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2971 the_cu
->section
= section
;
2972 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2973 struct dwarf2_per_cu_quick_data
);
2974 the_cu
->is_dwz
= is_dwz
;
2978 /* A helper for create_cus_from_index that handles a given list of
2982 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2983 const gdb_byte
*cu_list
, offset_type n_elements
,
2984 struct dwarf2_section_info
*section
,
2987 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2989 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2991 sect_offset sect_off
2992 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2993 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2996 dwarf2_per_cu_data
*per_cu
2997 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
2999 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
3003 /* Read the CU list from the mapped index, and use it to create all
3004 the CU objects for this objfile. */
3007 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3008 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
3009 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
3011 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
3012 dwarf2_per_objfile
->all_comp_units
.reserve
3013 ((cu_list_elements
+ dwz_elements
) / 2);
3015 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3016 &dwarf2_per_objfile
->info
, 0);
3018 if (dwz_elements
== 0)
3021 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3022 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
3026 /* Create the signatured type hash table from the index. */
3029 create_signatured_type_table_from_index
3030 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3031 struct dwarf2_section_info
*section
,
3032 const gdb_byte
*bytes
,
3033 offset_type elements
)
3035 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3037 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3038 dwarf2_per_objfile
->all_type_units
.reserve (elements
/ 3);
3040 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3042 for (offset_type i
= 0; i
< elements
; i
+= 3)
3044 struct signatured_type
*sig_type
;
3047 cu_offset type_offset_in_tu
;
3049 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3050 sect_offset sect_off
3051 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
3053 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
3055 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
3058 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3059 struct signatured_type
);
3060 sig_type
->signature
= signature
;
3061 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3062 sig_type
->per_cu
.is_debug_types
= 1;
3063 sig_type
->per_cu
.section
= section
;
3064 sig_type
->per_cu
.sect_off
= sect_off
;
3065 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3066 sig_type
->per_cu
.v
.quick
3067 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3068 struct dwarf2_per_cu_quick_data
);
3070 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3073 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3076 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3079 /* Create the signatured type hash table from .debug_names. */
3082 create_signatured_type_table_from_debug_names
3083 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3084 const mapped_debug_names
&map
,
3085 struct dwarf2_section_info
*section
,
3086 struct dwarf2_section_info
*abbrev_section
)
3088 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3090 dwarf2_read_section (objfile
, section
);
3091 dwarf2_read_section (objfile
, abbrev_section
);
3093 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3094 dwarf2_per_objfile
->all_type_units
.reserve (map
.tu_count
);
3096 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3098 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
3100 struct signatured_type
*sig_type
;
3103 sect_offset sect_off
3104 = (sect_offset
) (extract_unsigned_integer
3105 (map
.tu_table_reordered
+ i
* map
.offset_size
,
3107 map
.dwarf5_byte_order
));
3109 comp_unit_head cu_header
;
3110 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
3112 section
->buffer
+ to_underlying (sect_off
),
3115 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3116 struct signatured_type
);
3117 sig_type
->signature
= cu_header
.signature
;
3118 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
3119 sig_type
->per_cu
.is_debug_types
= 1;
3120 sig_type
->per_cu
.section
= section
;
3121 sig_type
->per_cu
.sect_off
= sect_off
;
3122 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3123 sig_type
->per_cu
.v
.quick
3124 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3125 struct dwarf2_per_cu_quick_data
);
3127 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3130 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3133 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3136 /* Read the address map data from the mapped index, and use it to
3137 populate the objfile's psymtabs_addrmap. */
3140 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3141 struct mapped_index
*index
)
3143 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3144 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3145 const gdb_byte
*iter
, *end
;
3146 struct addrmap
*mutable_map
;
3149 auto_obstack temp_obstack
;
3151 mutable_map
= addrmap_create_mutable (&temp_obstack
);
3153 iter
= index
->address_table
.data ();
3154 end
= iter
+ index
->address_table
.size ();
3156 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3160 ULONGEST hi
, lo
, cu_index
;
3161 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3163 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3165 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
3170 complaint (&symfile_complaints
,
3171 _(".gdb_index address table has invalid range (%s - %s)"),
3172 hex_string (lo
), hex_string (hi
));
3176 if (cu_index
>= dwarf2_per_objfile
->all_comp_units
.size ())
3178 complaint (&symfile_complaints
,
3179 _(".gdb_index address table has invalid CU number %u"),
3180 (unsigned) cu_index
);
3184 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
3185 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
3186 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
3187 dwarf2_per_objfile
->get_cu (cu_index
));
3190 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3191 &objfile
->objfile_obstack
);
3194 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
3195 populate the objfile's psymtabs_addrmap. */
3198 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3199 struct dwarf2_section_info
*section
)
3201 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3202 bfd
*abfd
= objfile
->obfd
;
3203 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3204 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
3205 SECT_OFF_TEXT (objfile
));
3207 auto_obstack temp_obstack
;
3208 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
3210 std::unordered_map
<sect_offset
,
3211 dwarf2_per_cu_data
*,
3212 gdb::hash_enum
<sect_offset
>>
3213 debug_info_offset_to_per_cu
;
3214 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3216 const auto insertpair
3217 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
3218 if (!insertpair
.second
)
3220 warning (_("Section .debug_aranges in %s has duplicate "
3221 "debug_info_offset %s, ignoring .debug_aranges."),
3222 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
3227 dwarf2_read_section (objfile
, section
);
3229 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
3231 const gdb_byte
*addr
= section
->buffer
;
3233 while (addr
< section
->buffer
+ section
->size
)
3235 const gdb_byte
*const entry_addr
= addr
;
3236 unsigned int bytes_read
;
3238 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
3242 const gdb_byte
*const entry_end
= addr
+ entry_length
;
3243 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
3244 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
3245 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
3247 warning (_("Section .debug_aranges in %s entry at offset %zu "
3248 "length %s exceeds section length %s, "
3249 "ignoring .debug_aranges."),
3250 objfile_name (objfile
), entry_addr
- section
->buffer
,
3251 plongest (bytes_read
+ entry_length
),
3252 pulongest (section
->size
));
3256 /* The version number. */
3257 const uint16_t version
= read_2_bytes (abfd
, addr
);
3261 warning (_("Section .debug_aranges in %s entry at offset %zu "
3262 "has unsupported version %d, ignoring .debug_aranges."),
3263 objfile_name (objfile
), entry_addr
- section
->buffer
,
3268 const uint64_t debug_info_offset
3269 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
3270 addr
+= offset_size
;
3271 const auto per_cu_it
3272 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
3273 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
3275 warning (_("Section .debug_aranges in %s entry at offset %zu "
3276 "debug_info_offset %s does not exists, "
3277 "ignoring .debug_aranges."),
3278 objfile_name (objfile
), entry_addr
- section
->buffer
,
3279 pulongest (debug_info_offset
));
3282 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
3284 const uint8_t address_size
= *addr
++;
3285 if (address_size
< 1 || address_size
> 8)
3287 warning (_("Section .debug_aranges in %s entry at offset %zu "
3288 "address_size %u is invalid, ignoring .debug_aranges."),
3289 objfile_name (objfile
), entry_addr
- section
->buffer
,
3294 const uint8_t segment_selector_size
= *addr
++;
3295 if (segment_selector_size
!= 0)
3297 warning (_("Section .debug_aranges in %s entry at offset %zu "
3298 "segment_selector_size %u is not supported, "
3299 "ignoring .debug_aranges."),
3300 objfile_name (objfile
), entry_addr
- section
->buffer
,
3301 segment_selector_size
);
3305 /* Must pad to an alignment boundary that is twice the address
3306 size. It is undocumented by the DWARF standard but GCC does
3308 for (size_t padding
= ((-(addr
- section
->buffer
))
3309 & (2 * address_size
- 1));
3310 padding
> 0; padding
--)
3313 warning (_("Section .debug_aranges in %s entry at offset %zu "
3314 "padding is not zero, ignoring .debug_aranges."),
3315 objfile_name (objfile
), entry_addr
- section
->buffer
);
3321 if (addr
+ 2 * address_size
> entry_end
)
3323 warning (_("Section .debug_aranges in %s entry at offset %zu "
3324 "address list is not properly terminated, "
3325 "ignoring .debug_aranges."),
3326 objfile_name (objfile
), entry_addr
- section
->buffer
);
3329 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
3331 addr
+= address_size
;
3332 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
3334 addr
+= address_size
;
3335 if (start
== 0 && length
== 0)
3337 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3339 /* Symbol was eliminated due to a COMDAT group. */
3342 ULONGEST end
= start
+ length
;
3343 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
);
3344 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
);
3345 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
3349 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3350 &objfile
->objfile_obstack
);
3353 /* Find a slot in the mapped index INDEX for the object named NAME.
3354 If NAME is found, set *VEC_OUT to point to the CU vector in the
3355 constant pool and return true. If NAME cannot be found, return
3359 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3360 offset_type
**vec_out
)
3363 offset_type slot
, step
;
3364 int (*cmp
) (const char *, const char *);
3366 gdb::unique_xmalloc_ptr
<char> without_params
;
3367 if (current_language
->la_language
== language_cplus
3368 || current_language
->la_language
== language_fortran
3369 || current_language
->la_language
== language_d
)
3371 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3374 if (strchr (name
, '(') != NULL
)
3376 without_params
= cp_remove_params (name
);
3378 if (without_params
!= NULL
)
3379 name
= without_params
.get ();
3383 /* Index version 4 did not support case insensitive searches. But the
3384 indices for case insensitive languages are built in lowercase, therefore
3385 simulate our NAME being searched is also lowercased. */
3386 hash
= mapped_index_string_hash ((index
->version
== 4
3387 && case_sensitivity
== case_sensitive_off
3388 ? 5 : index
->version
),
3391 slot
= hash
& (index
->symbol_table
.size () - 1);
3392 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
3393 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3399 const auto &bucket
= index
->symbol_table
[slot
];
3400 if (bucket
.name
== 0 && bucket
.vec
== 0)
3403 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
3404 if (!cmp (name
, str
))
3406 *vec_out
= (offset_type
*) (index
->constant_pool
3407 + MAYBE_SWAP (bucket
.vec
));
3411 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
3415 /* A helper function that reads the .gdb_index from SECTION and fills
3416 in MAP. FILENAME is the name of the file containing the section;
3417 it is used for error reporting. DEPRECATED_OK is true if it is
3418 ok to use deprecated sections.
3420 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3421 out parameters that are filled in with information about the CU and
3422 TU lists in the section.
3424 Returns 1 if all went well, 0 otherwise. */
3427 read_index_from_section (struct objfile
*objfile
,
3428 const char *filename
,
3430 struct dwarf2_section_info
*section
,
3431 struct mapped_index
*map
,
3432 const gdb_byte
**cu_list
,
3433 offset_type
*cu_list_elements
,
3434 const gdb_byte
**types_list
,
3435 offset_type
*types_list_elements
)
3437 const gdb_byte
*addr
;
3438 offset_type version
;
3439 offset_type
*metadata
;
3442 if (dwarf2_section_empty_p (section
))
3445 /* Older elfutils strip versions could keep the section in the main
3446 executable while splitting it for the separate debug info file. */
3447 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3450 dwarf2_read_section (objfile
, section
);
3452 addr
= section
->buffer
;
3453 /* Version check. */
3454 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3455 /* Versions earlier than 3 emitted every copy of a psymbol. This
3456 causes the index to behave very poorly for certain requests. Version 3
3457 contained incomplete addrmap. So, it seems better to just ignore such
3461 static int warning_printed
= 0;
3462 if (!warning_printed
)
3464 warning (_("Skipping obsolete .gdb_index section in %s."),
3466 warning_printed
= 1;
3470 /* Index version 4 uses a different hash function than index version
3473 Versions earlier than 6 did not emit psymbols for inlined
3474 functions. Using these files will cause GDB not to be able to
3475 set breakpoints on inlined functions by name, so we ignore these
3476 indices unless the user has done
3477 "set use-deprecated-index-sections on". */
3478 if (version
< 6 && !deprecated_ok
)
3480 static int warning_printed
= 0;
3481 if (!warning_printed
)
3484 Skipping deprecated .gdb_index section in %s.\n\
3485 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3486 to use the section anyway."),
3488 warning_printed
= 1;
3492 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3493 of the TU (for symbols coming from TUs),
3494 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3495 Plus gold-generated indices can have duplicate entries for global symbols,
3496 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3497 These are just performance bugs, and we can't distinguish gdb-generated
3498 indices from gold-generated ones, so issue no warning here. */
3500 /* Indexes with higher version than the one supported by GDB may be no
3501 longer backward compatible. */
3505 map
->version
= version
;
3507 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3510 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3511 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3515 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3516 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3517 - MAYBE_SWAP (metadata
[i
]))
3521 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3522 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3524 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3527 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3528 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3530 = gdb::array_view
<mapped_index::symbol_table_slot
>
3531 ((mapped_index::symbol_table_slot
*) symbol_table
,
3532 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3535 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3540 /* Read .gdb_index. If everything went ok, initialize the "quick"
3541 elements of all the CUs and return 1. Otherwise, return 0. */
3544 dwarf2_read_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
3546 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3547 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3548 struct dwz_file
*dwz
;
3549 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3551 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3552 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3553 use_deprecated_index_sections
,
3554 &dwarf2_per_objfile
->gdb_index
, map
.get (),
3555 &cu_list
, &cu_list_elements
,
3556 &types_list
, &types_list_elements
))
3559 /* Don't use the index if it's empty. */
3560 if (map
->symbol_table
.empty ())
3563 /* If there is a .dwz file, read it so we can get its CU list as
3565 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3568 struct mapped_index dwz_map
;
3569 const gdb_byte
*dwz_types_ignore
;
3570 offset_type dwz_types_elements_ignore
;
3572 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3574 &dwz
->gdb_index
, &dwz_map
,
3575 &dwz_list
, &dwz_list_elements
,
3577 &dwz_types_elements_ignore
))
3579 warning (_("could not read '.gdb_index' section from %s; skipping"),
3580 bfd_get_filename (dwz
->dwz_bfd
));
3585 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3586 dwz_list
, dwz_list_elements
);
3588 if (types_list_elements
)
3590 struct dwarf2_section_info
*section
;
3592 /* We can only handle a single .debug_types when we have an
3594 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3597 section
= VEC_index (dwarf2_section_info_def
,
3598 dwarf2_per_objfile
->types
, 0);
3600 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3601 types_list
, types_list_elements
);
3604 create_addrmap_from_index (dwarf2_per_objfile
, map
.get ());
3606 dwarf2_per_objfile
->index_table
= std::move (map
);
3607 dwarf2_per_objfile
->using_index
= 1;
3608 dwarf2_per_objfile
->quick_file_names_table
=
3609 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
3614 /* die_reader_func for dw2_get_file_names. */
3617 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3618 const gdb_byte
*info_ptr
,
3619 struct die_info
*comp_unit_die
,
3623 struct dwarf2_cu
*cu
= reader
->cu
;
3624 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3625 struct dwarf2_per_objfile
*dwarf2_per_objfile
3626 = cu
->per_cu
->dwarf2_per_objfile
;
3627 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3628 struct dwarf2_per_cu_data
*lh_cu
;
3629 struct attribute
*attr
;
3632 struct quick_file_names
*qfn
;
3634 gdb_assert (! this_cu
->is_debug_types
);
3636 /* Our callers never want to match partial units -- instead they
3637 will match the enclosing full CU. */
3638 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3640 this_cu
->v
.quick
->no_file_data
= 1;
3648 sect_offset line_offset
{};
3650 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3653 struct quick_file_names find_entry
;
3655 line_offset
= (sect_offset
) DW_UNSND (attr
);
3657 /* We may have already read in this line header (TU line header sharing).
3658 If we have we're done. */
3659 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3660 find_entry
.hash
.line_sect_off
= line_offset
;
3661 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3662 &find_entry
, INSERT
);
3665 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3669 lh
= dwarf_decode_line_header (line_offset
, cu
);
3673 lh_cu
->v
.quick
->no_file_data
= 1;
3677 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3678 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3679 qfn
->hash
.line_sect_off
= line_offset
;
3680 gdb_assert (slot
!= NULL
);
3683 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3685 qfn
->num_file_names
= lh
->file_names
.size ();
3687 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->file_names
.size ());
3688 for (i
= 0; i
< lh
->file_names
.size (); ++i
)
3689 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
3690 qfn
->real_names
= NULL
;
3692 lh_cu
->v
.quick
->file_names
= qfn
;
3695 /* A helper for the "quick" functions which attempts to read the line
3696 table for THIS_CU. */
3698 static struct quick_file_names
*
3699 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3701 /* This should never be called for TUs. */
3702 gdb_assert (! this_cu
->is_debug_types
);
3703 /* Nor type unit groups. */
3704 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3706 if (this_cu
->v
.quick
->file_names
!= NULL
)
3707 return this_cu
->v
.quick
->file_names
;
3708 /* If we know there is no line data, no point in looking again. */
3709 if (this_cu
->v
.quick
->no_file_data
)
3712 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3714 if (this_cu
->v
.quick
->no_file_data
)
3716 return this_cu
->v
.quick
->file_names
;
3719 /* A helper for the "quick" functions which computes and caches the
3720 real path for a given file name from the line table. */
3723 dw2_get_real_path (struct objfile
*objfile
,
3724 struct quick_file_names
*qfn
, int index
)
3726 if (qfn
->real_names
== NULL
)
3727 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3728 qfn
->num_file_names
, const char *);
3730 if (qfn
->real_names
[index
] == NULL
)
3731 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3733 return qfn
->real_names
[index
];
3736 static struct symtab
*
3737 dw2_find_last_source_symtab (struct objfile
*objfile
)
3739 struct dwarf2_per_objfile
*dwarf2_per_objfile
3740 = get_dwarf2_per_objfile (objfile
);
3741 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->all_comp_units
.back ();
3742 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
, false);
3747 return compunit_primary_filetab (cust
);
3750 /* Traversal function for dw2_forget_cached_source_info. */
3753 dw2_free_cached_file_names (void **slot
, void *info
)
3755 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3757 if (file_data
->real_names
)
3761 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3763 xfree ((void*) file_data
->real_names
[i
]);
3764 file_data
->real_names
[i
] = NULL
;
3772 dw2_forget_cached_source_info (struct objfile
*objfile
)
3774 struct dwarf2_per_objfile
*dwarf2_per_objfile
3775 = get_dwarf2_per_objfile (objfile
);
3777 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3778 dw2_free_cached_file_names
, NULL
);
3781 /* Helper function for dw2_map_symtabs_matching_filename that expands
3782 the symtabs and calls the iterator. */
3785 dw2_map_expand_apply (struct objfile
*objfile
,
3786 struct dwarf2_per_cu_data
*per_cu
,
3787 const char *name
, const char *real_path
,
3788 gdb::function_view
<bool (symtab
*)> callback
)
3790 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3792 /* Don't visit already-expanded CUs. */
3793 if (per_cu
->v
.quick
->compunit_symtab
)
3796 /* This may expand more than one symtab, and we want to iterate over
3798 dw2_instantiate_symtab (per_cu
, false);
3800 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3801 last_made
, callback
);
3804 /* Implementation of the map_symtabs_matching_filename method. */
3807 dw2_map_symtabs_matching_filename
3808 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3809 gdb::function_view
<bool (symtab
*)> callback
)
3811 const char *name_basename
= lbasename (name
);
3812 struct dwarf2_per_objfile
*dwarf2_per_objfile
3813 = get_dwarf2_per_objfile (objfile
);
3815 /* The rule is CUs specify all the files, including those used by
3816 any TU, so there's no need to scan TUs here. */
3818 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3820 /* We only need to look at symtabs not already expanded. */
3821 if (per_cu
->v
.quick
->compunit_symtab
)
3824 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3825 if (file_data
== NULL
)
3828 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3830 const char *this_name
= file_data
->file_names
[j
];
3831 const char *this_real_name
;
3833 if (compare_filenames_for_search (this_name
, name
))
3835 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3841 /* Before we invoke realpath, which can get expensive when many
3842 files are involved, do a quick comparison of the basenames. */
3843 if (! basenames_may_differ
3844 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3847 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3848 if (compare_filenames_for_search (this_real_name
, name
))
3850 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3856 if (real_path
!= NULL
)
3858 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3859 gdb_assert (IS_ABSOLUTE_PATH (name
));
3860 if (this_real_name
!= NULL
3861 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3863 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3875 /* Struct used to manage iterating over all CUs looking for a symbol. */
3877 struct dw2_symtab_iterator
3879 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3880 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3881 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3882 int want_specific_block
;
3883 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3884 Unused if !WANT_SPECIFIC_BLOCK. */
3886 /* The kind of symbol we're looking for. */
3888 /* The list of CUs from the index entry of the symbol,
3889 or NULL if not found. */
3891 /* The next element in VEC to look at. */
3893 /* The number of elements in VEC, or zero if there is no match. */
3895 /* Have we seen a global version of the symbol?
3896 If so we can ignore all further global instances.
3897 This is to work around gold/15646, inefficient gold-generated
3902 /* Initialize the index symtab iterator ITER.
3903 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3904 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3907 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3908 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3909 int want_specific_block
,
3914 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3915 iter
->want_specific_block
= want_specific_block
;
3916 iter
->block_index
= block_index
;
3917 iter
->domain
= domain
;
3919 iter
->global_seen
= 0;
3921 mapped_index
*index
= dwarf2_per_objfile
->index_table
.get ();
3923 /* index is NULL if OBJF_READNOW. */
3924 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3925 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3933 /* Return the next matching CU or NULL if there are no more. */
3935 static struct dwarf2_per_cu_data
*
3936 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3938 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3940 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3942 offset_type cu_index_and_attrs
=
3943 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3944 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3945 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3946 /* This value is only valid for index versions >= 7. */
3947 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3948 gdb_index_symbol_kind symbol_kind
=
3949 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3950 /* Only check the symbol attributes if they're present.
3951 Indices prior to version 7 don't record them,
3952 and indices >= 7 may elide them for certain symbols
3953 (gold does this). */
3955 (dwarf2_per_objfile
->index_table
->version
>= 7
3956 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3958 /* Don't crash on bad data. */
3959 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
3960 + dwarf2_per_objfile
->all_type_units
.size ()))
3962 complaint (&symfile_complaints
,
3963 _(".gdb_index entry has bad CU index"
3965 objfile_name (dwarf2_per_objfile
->objfile
));
3969 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
3971 /* Skip if already read in. */
3972 if (per_cu
->v
.quick
->compunit_symtab
)
3975 /* Check static vs global. */
3978 if (iter
->want_specific_block
3979 && want_static
!= is_static
)
3981 /* Work around gold/15646. */
3982 if (!is_static
&& iter
->global_seen
)
3985 iter
->global_seen
= 1;
3988 /* Only check the symbol's kind if it has one. */
3991 switch (iter
->domain
)
3994 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3995 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3996 /* Some types are also in VAR_DOMAIN. */
3997 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4001 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4005 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4020 static struct compunit_symtab
*
4021 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
4022 const char *name
, domain_enum domain
)
4024 struct compunit_symtab
*stab_best
= NULL
;
4025 struct dwarf2_per_objfile
*dwarf2_per_objfile
4026 = get_dwarf2_per_objfile (objfile
);
4028 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
4030 struct dw2_symtab_iterator iter
;
4031 struct dwarf2_per_cu_data
*per_cu
;
4033 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 1, block_index
, domain
, name
);
4035 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4037 struct symbol
*sym
, *with_opaque
= NULL
;
4038 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
4039 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
4040 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
4042 sym
= block_find_symbol (block
, name
, domain
,
4043 block_find_non_opaque_type_preferred
,
4046 /* Some caution must be observed with overloaded functions
4047 and methods, since the index will not contain any overload
4048 information (but NAME might contain it). */
4051 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
4053 if (with_opaque
!= NULL
4054 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
4057 /* Keep looking through other CUs. */
4064 dw2_print_stats (struct objfile
*objfile
)
4066 struct dwarf2_per_objfile
*dwarf2_per_objfile
4067 = get_dwarf2_per_objfile (objfile
);
4068 int total
= (dwarf2_per_objfile
->all_comp_units
.size ()
4069 + dwarf2_per_objfile
->all_type_units
.size ());
4072 for (int i
= 0; i
< total
; ++i
)
4074 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4076 if (!per_cu
->v
.quick
->compunit_symtab
)
4079 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
4080 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
4083 /* This dumps minimal information about the index.
4084 It is called via "mt print objfiles".
4085 One use is to verify .gdb_index has been loaded by the
4086 gdb.dwarf2/gdb-index.exp testcase. */
4089 dw2_dump (struct objfile
*objfile
)
4091 struct dwarf2_per_objfile
*dwarf2_per_objfile
4092 = get_dwarf2_per_objfile (objfile
);
4094 gdb_assert (dwarf2_per_objfile
->using_index
);
4095 printf_filtered (".gdb_index:");
4096 if (dwarf2_per_objfile
->index_table
!= NULL
)
4098 printf_filtered (" version %d\n",
4099 dwarf2_per_objfile
->index_table
->version
);
4102 printf_filtered (" faked for \"readnow\"\n");
4103 printf_filtered ("\n");
4107 dw2_relocate (struct objfile
*objfile
,
4108 const struct section_offsets
*new_offsets
,
4109 const struct section_offsets
*delta
)
4111 /* There's nothing to relocate here. */
4115 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
4116 const char *func_name
)
4118 struct dwarf2_per_objfile
*dwarf2_per_objfile
4119 = get_dwarf2_per_objfile (objfile
);
4121 struct dw2_symtab_iterator iter
;
4122 struct dwarf2_per_cu_data
*per_cu
;
4124 /* Note: It doesn't matter what we pass for block_index here. */
4125 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
4128 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4129 dw2_instantiate_symtab (per_cu
, false);
4134 dw2_expand_all_symtabs (struct objfile
*objfile
)
4136 struct dwarf2_per_objfile
*dwarf2_per_objfile
4137 = get_dwarf2_per_objfile (objfile
);
4138 int total_units
= (dwarf2_per_objfile
->all_comp_units
.size ()
4139 + dwarf2_per_objfile
->all_type_units
.size ());
4141 for (int i
= 0; i
< total_units
; ++i
)
4143 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4145 /* We don't want to directly expand a partial CU, because if we
4146 read it with the wrong language, then assertion failures can
4147 be triggered later on. See PR symtab/23010. So, tell
4148 dw2_instantiate_symtab to skip partial CUs -- any important
4149 partial CU will be read via DW_TAG_imported_unit anyway. */
4150 dw2_instantiate_symtab (per_cu
, true);
4155 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
4156 const char *fullname
)
4158 struct dwarf2_per_objfile
*dwarf2_per_objfile
4159 = get_dwarf2_per_objfile (objfile
);
4161 /* We don't need to consider type units here.
4162 This is only called for examining code, e.g. expand_line_sal.
4163 There can be an order of magnitude (or more) more type units
4164 than comp units, and we avoid them if we can. */
4166 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4168 /* We only need to look at symtabs not already expanded. */
4169 if (per_cu
->v
.quick
->compunit_symtab
)
4172 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4173 if (file_data
== NULL
)
4176 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4178 const char *this_fullname
= file_data
->file_names
[j
];
4180 if (filename_cmp (this_fullname
, fullname
) == 0)
4182 dw2_instantiate_symtab (per_cu
, false);
4190 dw2_map_matching_symbols (struct objfile
*objfile
,
4191 const char * name
, domain_enum domain
,
4193 int (*callback
) (struct block
*,
4194 struct symbol
*, void *),
4195 void *data
, symbol_name_match_type match
,
4196 symbol_compare_ftype
*ordered_compare
)
4198 /* Currently unimplemented; used for Ada. The function can be called if the
4199 current language is Ada for a non-Ada objfile using GNU index. As Ada
4200 does not look for non-Ada symbols this function should just return. */
4203 /* Symbol name matcher for .gdb_index names.
4205 Symbol names in .gdb_index have a few particularities:
4207 - There's no indication of which is the language of each symbol.
4209 Since each language has its own symbol name matching algorithm,
4210 and we don't know which language is the right one, we must match
4211 each symbol against all languages. This would be a potential
4212 performance problem if it were not mitigated by the
4213 mapped_index::name_components lookup table, which significantly
4214 reduces the number of times we need to call into this matcher,
4215 making it a non-issue.
4217 - Symbol names in the index have no overload (parameter)
4218 information. I.e., in C++, "foo(int)" and "foo(long)" both
4219 appear as "foo" in the index, for example.
4221 This means that the lookup names passed to the symbol name
4222 matcher functions must have no parameter information either
4223 because (e.g.) symbol search name "foo" does not match
4224 lookup-name "foo(int)" [while swapping search name for lookup
4227 class gdb_index_symbol_name_matcher
4230 /* Prepares the vector of comparison functions for LOOKUP_NAME. */
4231 gdb_index_symbol_name_matcher (const lookup_name_info
&lookup_name
);
4233 /* Walk all the matcher routines and match SYMBOL_NAME against them.
4234 Returns true if any matcher matches. */
4235 bool matches (const char *symbol_name
);
4238 /* A reference to the lookup name we're matching against. */
4239 const lookup_name_info
&m_lookup_name
;
4241 /* A vector holding all the different symbol name matchers, for all
4243 std::vector
<symbol_name_matcher_ftype
*> m_symbol_name_matcher_funcs
;
4246 gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher
4247 (const lookup_name_info
&lookup_name
)
4248 : m_lookup_name (lookup_name
)
4250 /* Prepare the vector of comparison functions upfront, to avoid
4251 doing the same work for each symbol. Care is taken to avoid
4252 matching with the same matcher more than once if/when multiple
4253 languages use the same matcher function. */
4254 auto &matchers
= m_symbol_name_matcher_funcs
;
4255 matchers
.reserve (nr_languages
);
4257 matchers
.push_back (default_symbol_name_matcher
);
4259 for (int i
= 0; i
< nr_languages
; i
++)
4261 const language_defn
*lang
= language_def ((enum language
) i
);
4262 symbol_name_matcher_ftype
*name_matcher
4263 = get_symbol_name_matcher (lang
, m_lookup_name
);
4265 /* Don't insert the same comparison routine more than once.
4266 Note that we do this linear walk instead of a seemingly
4267 cheaper sorted insert, or use a std::set or something like
4268 that, because relative order of function addresses is not
4269 stable. This is not a problem in practice because the number
4270 of supported languages is low, and the cost here is tiny
4271 compared to the number of searches we'll do afterwards using
4273 if (name_matcher
!= default_symbol_name_matcher
4274 && (std::find (matchers
.begin (), matchers
.end (), name_matcher
)
4275 == matchers
.end ()))
4276 matchers
.push_back (name_matcher
);
4281 gdb_index_symbol_name_matcher::matches (const char *symbol_name
)
4283 for (auto matches_name
: m_symbol_name_matcher_funcs
)
4284 if (matches_name (symbol_name
, m_lookup_name
, NULL
))
4290 /* Starting from a search name, return the string that finds the upper
4291 bound of all strings that start with SEARCH_NAME in a sorted name
4292 list. Returns the empty string to indicate that the upper bound is
4293 the end of the list. */
4296 make_sort_after_prefix_name (const char *search_name
)
4298 /* When looking to complete "func", we find the upper bound of all
4299 symbols that start with "func" by looking for where we'd insert
4300 the closest string that would follow "func" in lexicographical
4301 order. Usually, that's "func"-with-last-character-incremented,
4302 i.e. "fund". Mind non-ASCII characters, though. Usually those
4303 will be UTF-8 multi-byte sequences, but we can't be certain.
4304 Especially mind the 0xff character, which is a valid character in
4305 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
4306 rule out compilers allowing it in identifiers. Note that
4307 conveniently, strcmp/strcasecmp are specified to compare
4308 characters interpreted as unsigned char. So what we do is treat
4309 the whole string as a base 256 number composed of a sequence of
4310 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
4311 to 0, and carries 1 to the following more-significant position.
4312 If the very first character in SEARCH_NAME ends up incremented
4313 and carries/overflows, then the upper bound is the end of the
4314 list. The string after the empty string is also the empty
4317 Some examples of this operation:
4319 SEARCH_NAME => "+1" RESULT
4323 "\xff" "a" "\xff" => "\xff" "b"
4328 Then, with these symbols for example:
4334 completing "func" looks for symbols between "func" and
4335 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
4336 which finds "func" and "func1", but not "fund".
4340 funcÿ (Latin1 'ÿ' [0xff])
4344 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
4345 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
4349 ÿÿ (Latin1 'ÿ' [0xff])
4352 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
4353 the end of the list.
4355 std::string after
= search_name
;
4356 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
4358 if (!after
.empty ())
4359 after
.back () = (unsigned char) after
.back () + 1;
4363 /* See declaration. */
4365 std::pair
<std::vector
<name_component
>::const_iterator
,
4366 std::vector
<name_component
>::const_iterator
>
4367 mapped_index_base::find_name_components_bounds
4368 (const lookup_name_info
&lookup_name_without_params
) const
4371 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4374 = lookup_name_without_params
.cplus ().lookup_name ().c_str ();
4376 /* Comparison function object for lower_bound that matches against a
4377 given symbol name. */
4378 auto lookup_compare_lower
= [&] (const name_component
&elem
,
4381 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4382 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4383 return name_cmp (elem_name
, name
) < 0;
4386 /* Comparison function object for upper_bound that matches against a
4387 given symbol name. */
4388 auto lookup_compare_upper
= [&] (const char *name
,
4389 const name_component
&elem
)
4391 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4392 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4393 return name_cmp (name
, elem_name
) < 0;
4396 auto begin
= this->name_components
.begin ();
4397 auto end
= this->name_components
.end ();
4399 /* Find the lower bound. */
4402 if (lookup_name_without_params
.completion_mode () && cplus
[0] == '\0')
4405 return std::lower_bound (begin
, end
, cplus
, lookup_compare_lower
);
4408 /* Find the upper bound. */
4411 if (lookup_name_without_params
.completion_mode ())
4413 /* In completion mode, we want UPPER to point past all
4414 symbols names that have the same prefix. I.e., with
4415 these symbols, and completing "func":
4417 function << lower bound
4419 other_function << upper bound
4421 We find the upper bound by looking for the insertion
4422 point of "func"-with-last-character-incremented,
4424 std::string after
= make_sort_after_prefix_name (cplus
);
4427 return std::lower_bound (lower
, end
, after
.c_str (),
4428 lookup_compare_lower
);
4431 return std::upper_bound (lower
, end
, cplus
, lookup_compare_upper
);
4434 return {lower
, upper
};
4437 /* See declaration. */
4440 mapped_index_base::build_name_components ()
4442 if (!this->name_components
.empty ())
4445 this->name_components_casing
= case_sensitivity
;
4447 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4449 /* The code below only knows how to break apart components of C++
4450 symbol names (and other languages that use '::' as
4451 namespace/module separator). If we add support for wild matching
4452 to some language that uses some other operator (E.g., Ada, Go and
4453 D use '.'), then we'll need to try splitting the symbol name
4454 according to that language too. Note that Ada does support wild
4455 matching, but doesn't currently support .gdb_index. */
4456 auto count
= this->symbol_name_count ();
4457 for (offset_type idx
= 0; idx
< count
; idx
++)
4459 if (this->symbol_name_slot_invalid (idx
))
4462 const char *name
= this->symbol_name_at (idx
);
4464 /* Add each name component to the name component table. */
4465 unsigned int previous_len
= 0;
4466 for (unsigned int current_len
= cp_find_first_component (name
);
4467 name
[current_len
] != '\0';
4468 current_len
+= cp_find_first_component (name
+ current_len
))
4470 gdb_assert (name
[current_len
] == ':');
4471 this->name_components
.push_back ({previous_len
, idx
});
4472 /* Skip the '::'. */
4474 previous_len
= current_len
;
4476 this->name_components
.push_back ({previous_len
, idx
});
4479 /* Sort name_components elements by name. */
4480 auto name_comp_compare
= [&] (const name_component
&left
,
4481 const name_component
&right
)
4483 const char *left_qualified
= this->symbol_name_at (left
.idx
);
4484 const char *right_qualified
= this->symbol_name_at (right
.idx
);
4486 const char *left_name
= left_qualified
+ left
.name_offset
;
4487 const char *right_name
= right_qualified
+ right
.name_offset
;
4489 return name_cmp (left_name
, right_name
) < 0;
4492 std::sort (this->name_components
.begin (),
4493 this->name_components
.end (),
4497 /* Helper for dw2_expand_symtabs_matching that works with a
4498 mapped_index_base instead of the containing objfile. This is split
4499 to a separate function in order to be able to unit test the
4500 name_components matching using a mock mapped_index_base. For each
4501 symbol name that matches, calls MATCH_CALLBACK, passing it the
4502 symbol's index in the mapped_index_base symbol table. */
4505 dw2_expand_symtabs_matching_symbol
4506 (mapped_index_base
&index
,
4507 const lookup_name_info
&lookup_name_in
,
4508 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4509 enum search_domain kind
,
4510 gdb::function_view
<void (offset_type
)> match_callback
)
4512 lookup_name_info lookup_name_without_params
4513 = lookup_name_in
.make_ignore_params ();
4514 gdb_index_symbol_name_matcher lookup_name_matcher
4515 (lookup_name_without_params
);
4517 /* Build the symbol name component sorted vector, if we haven't
4519 index
.build_name_components ();
4521 auto bounds
= index
.find_name_components_bounds (lookup_name_without_params
);
4523 /* Now for each symbol name in range, check to see if we have a name
4524 match, and if so, call the MATCH_CALLBACK callback. */
4526 /* The same symbol may appear more than once in the range though.
4527 E.g., if we're looking for symbols that complete "w", and we have
4528 a symbol named "w1::w2", we'll find the two name components for
4529 that same symbol in the range. To be sure we only call the
4530 callback once per symbol, we first collect the symbol name
4531 indexes that matched in a temporary vector and ignore
4533 std::vector
<offset_type
> matches
;
4534 matches
.reserve (std::distance (bounds
.first
, bounds
.second
));
4536 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4538 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4540 if (!lookup_name_matcher
.matches (qualified
)
4541 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4544 matches
.push_back (bounds
.first
->idx
);
4547 std::sort (matches
.begin (), matches
.end ());
4549 /* Finally call the callback, once per match. */
4551 for (offset_type idx
: matches
)
4555 match_callback (idx
);
4560 /* Above we use a type wider than idx's for 'prev', since 0 and
4561 (offset_type)-1 are both possible values. */
4562 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4567 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4569 /* A mock .gdb_index/.debug_names-like name index table, enough to
4570 exercise dw2_expand_symtabs_matching_symbol, which works with the
4571 mapped_index_base interface. Builds an index from the symbol list
4572 passed as parameter to the constructor. */
4573 class mock_mapped_index
: public mapped_index_base
4576 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4577 : m_symbol_table (symbols
)
4580 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4582 /* Return the number of names in the symbol table. */
4583 size_t symbol_name_count () const override
4585 return m_symbol_table
.size ();
4588 /* Get the name of the symbol at IDX in the symbol table. */
4589 const char *symbol_name_at (offset_type idx
) const override
4591 return m_symbol_table
[idx
];
4595 gdb::array_view
<const char *> m_symbol_table
;
4598 /* Convenience function that converts a NULL pointer to a "<null>"
4599 string, to pass to print routines. */
4602 string_or_null (const char *str
)
4604 return str
!= NULL
? str
: "<null>";
4607 /* Check if a lookup_name_info built from
4608 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4609 index. EXPECTED_LIST is the list of expected matches, in expected
4610 matching order. If no match expected, then an empty list is
4611 specified. Returns true on success. On failure prints a warning
4612 indicating the file:line that failed, and returns false. */
4615 check_match (const char *file
, int line
,
4616 mock_mapped_index
&mock_index
,
4617 const char *name
, symbol_name_match_type match_type
,
4618 bool completion_mode
,
4619 std::initializer_list
<const char *> expected_list
)
4621 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4623 bool matched
= true;
4625 auto mismatch
= [&] (const char *expected_str
,
4628 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4629 "expected=\"%s\", got=\"%s\"\n"),
4631 (match_type
== symbol_name_match_type::FULL
4633 name
, string_or_null (expected_str
), string_or_null (got
));
4637 auto expected_it
= expected_list
.begin ();
4638 auto expected_end
= expected_list
.end ();
4640 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4642 [&] (offset_type idx
)
4644 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4645 const char *expected_str
4646 = expected_it
== expected_end
? NULL
: *expected_it
++;
4648 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4649 mismatch (expected_str
, matched_name
);
4652 const char *expected_str
4653 = expected_it
== expected_end
? NULL
: *expected_it
++;
4654 if (expected_str
!= NULL
)
4655 mismatch (expected_str
, NULL
);
4660 /* The symbols added to the mock mapped_index for testing (in
4662 static const char *test_symbols
[] = {
4671 "ns2::tmpl<int>::foo2",
4672 "(anonymous namespace)::A::B::C",
4674 /* These are used to check that the increment-last-char in the
4675 matching algorithm for completion doesn't match "t1_fund" when
4676 completing "t1_func". */
4682 /* A UTF-8 name with multi-byte sequences to make sure that
4683 cp-name-parser understands this as a single identifier ("função"
4684 is "function" in PT). */
4687 /* \377 (0xff) is Latin1 'ÿ'. */
4690 /* \377 (0xff) is Latin1 'ÿ'. */
4694 /* A name with all sorts of complications. Starts with "z" to make
4695 it easier for the completion tests below. */
4696 #define Z_SYM_NAME \
4697 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4698 "::tuple<(anonymous namespace)::ui*, " \
4699 "std::default_delete<(anonymous namespace)::ui>, void>"
4704 /* Returns true if the mapped_index_base::find_name_component_bounds
4705 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4706 in completion mode. */
4709 check_find_bounds_finds (mapped_index_base
&index
,
4710 const char *search_name
,
4711 gdb::array_view
<const char *> expected_syms
)
4713 lookup_name_info
lookup_name (search_name
,
4714 symbol_name_match_type::FULL
, true);
4716 auto bounds
= index
.find_name_components_bounds (lookup_name
);
4718 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4719 if (distance
!= expected_syms
.size ())
4722 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4724 auto nc_elem
= bounds
.first
+ exp_elem
;
4725 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4726 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4733 /* Test the lower-level mapped_index::find_name_component_bounds
4737 test_mapped_index_find_name_component_bounds ()
4739 mock_mapped_index
mock_index (test_symbols
);
4741 mock_index
.build_name_components ();
4743 /* Test the lower-level mapped_index::find_name_component_bounds
4744 method in completion mode. */
4746 static const char *expected_syms
[] = {
4751 SELF_CHECK (check_find_bounds_finds (mock_index
,
4752 "t1_func", expected_syms
));
4755 /* Check that the increment-last-char in the name matching algorithm
4756 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4758 static const char *expected_syms1
[] = {
4762 SELF_CHECK (check_find_bounds_finds (mock_index
,
4763 "\377", expected_syms1
));
4765 static const char *expected_syms2
[] = {
4768 SELF_CHECK (check_find_bounds_finds (mock_index
,
4769 "\377\377", expected_syms2
));
4773 /* Test dw2_expand_symtabs_matching_symbol. */
4776 test_dw2_expand_symtabs_matching_symbol ()
4778 mock_mapped_index
mock_index (test_symbols
);
4780 /* We let all tests run until the end even if some fails, for debug
4782 bool any_mismatch
= false;
4784 /* Create the expected symbols list (an initializer_list). Needed
4785 because lists have commas, and we need to pass them to CHECK,
4786 which is a macro. */
4787 #define EXPECT(...) { __VA_ARGS__ }
4789 /* Wrapper for check_match that passes down the current
4790 __FILE__/__LINE__. */
4791 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4792 any_mismatch |= !check_match (__FILE__, __LINE__, \
4794 NAME, MATCH_TYPE, COMPLETION_MODE, \
4797 /* Identity checks. */
4798 for (const char *sym
: test_symbols
)
4800 /* Should be able to match all existing symbols. */
4801 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4804 /* Should be able to match all existing symbols with
4806 std::string with_params
= std::string (sym
) + "(int)";
4807 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4810 /* Should be able to match all existing symbols with
4811 parameters and qualifiers. */
4812 with_params
= std::string (sym
) + " ( int ) const";
4813 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4816 /* This should really find sym, but cp-name-parser.y doesn't
4817 know about lvalue/rvalue qualifiers yet. */
4818 with_params
= std::string (sym
) + " ( int ) &&";
4819 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4823 /* Check that the name matching algorithm for completion doesn't get
4824 confused with Latin1 'ÿ' / 0xff. */
4826 static const char str
[] = "\377";
4827 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4828 EXPECT ("\377", "\377\377123"));
4831 /* Check that the increment-last-char in the matching algorithm for
4832 completion doesn't match "t1_fund" when completing "t1_func". */
4834 static const char str
[] = "t1_func";
4835 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4836 EXPECT ("t1_func", "t1_func1"));
4839 /* Check that completion mode works at each prefix of the expected
4842 static const char str
[] = "function(int)";
4843 size_t len
= strlen (str
);
4846 for (size_t i
= 1; i
< len
; i
++)
4848 lookup
.assign (str
, i
);
4849 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4850 EXPECT ("function"));
4854 /* While "w" is a prefix of both components, the match function
4855 should still only be called once. */
4857 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4859 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4863 /* Same, with a "complicated" symbol. */
4865 static const char str
[] = Z_SYM_NAME
;
4866 size_t len
= strlen (str
);
4869 for (size_t i
= 1; i
< len
; i
++)
4871 lookup
.assign (str
, i
);
4872 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4873 EXPECT (Z_SYM_NAME
));
4877 /* In FULL mode, an incomplete symbol doesn't match. */
4879 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4883 /* A complete symbol with parameters matches any overload, since the
4884 index has no overload info. */
4886 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4887 EXPECT ("std::zfunction", "std::zfunction2"));
4888 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4889 EXPECT ("std::zfunction", "std::zfunction2"));
4890 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4891 EXPECT ("std::zfunction", "std::zfunction2"));
4894 /* Check that whitespace is ignored appropriately. A symbol with a
4895 template argument list. */
4897 static const char expected
[] = "ns::foo<int>";
4898 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4900 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4904 /* Check that whitespace is ignored appropriately. A symbol with a
4905 template argument list that includes a pointer. */
4907 static const char expected
[] = "ns::foo<char*>";
4908 /* Try both completion and non-completion modes. */
4909 static const bool completion_mode
[2] = {false, true};
4910 for (size_t i
= 0; i
< 2; i
++)
4912 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4913 completion_mode
[i
], EXPECT (expected
));
4914 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4915 completion_mode
[i
], EXPECT (expected
));
4917 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4918 completion_mode
[i
], EXPECT (expected
));
4919 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4920 completion_mode
[i
], EXPECT (expected
));
4925 /* Check method qualifiers are ignored. */
4926 static const char expected
[] = "ns::foo<char*>";
4927 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4928 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4929 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4930 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4931 CHECK_MATCH ("foo < char * > ( int ) const",
4932 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4933 CHECK_MATCH ("foo < char * > ( int ) &&",
4934 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4937 /* Test lookup names that don't match anything. */
4939 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4942 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4946 /* Some wild matching tests, exercising "(anonymous namespace)",
4947 which should not be confused with a parameter list. */
4949 static const char *syms
[] = {
4953 "A :: B :: C ( int )",
4958 for (const char *s
: syms
)
4960 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4961 EXPECT ("(anonymous namespace)::A::B::C"));
4966 static const char expected
[] = "ns2::tmpl<int>::foo2";
4967 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4969 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4973 SELF_CHECK (!any_mismatch
);
4982 test_mapped_index_find_name_component_bounds ();
4983 test_dw2_expand_symtabs_matching_symbol ();
4986 }} // namespace selftests::dw2_expand_symtabs_matching
4988 #endif /* GDB_SELF_TEST */
4990 /* If FILE_MATCHER is NULL or if PER_CU has
4991 dwarf2_per_cu_quick_data::MARK set (see
4992 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4993 EXPANSION_NOTIFY on it. */
4996 dw2_expand_symtabs_matching_one
4997 (struct dwarf2_per_cu_data
*per_cu
,
4998 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4999 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
5001 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
5003 bool symtab_was_null
5004 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
5006 dw2_instantiate_symtab (per_cu
, false);
5008 if (expansion_notify
!= NULL
5010 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
5011 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
5015 /* Helper for dw2_expand_matching symtabs. Called on each symbol
5016 matched, to expand corresponding CUs that were marked. IDX is the
5017 index of the symbol name that matched. */
5020 dw2_expand_marked_cus
5021 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
5022 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5023 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5026 offset_type
*vec
, vec_len
, vec_idx
;
5027 bool global_seen
= false;
5028 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5030 vec
= (offset_type
*) (index
.constant_pool
5031 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
5032 vec_len
= MAYBE_SWAP (vec
[0]);
5033 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
5035 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
5036 /* This value is only valid for index versions >= 7. */
5037 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
5038 gdb_index_symbol_kind symbol_kind
=
5039 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
5040 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
5041 /* Only check the symbol attributes if they're present.
5042 Indices prior to version 7 don't record them,
5043 and indices >= 7 may elide them for certain symbols
5044 (gold does this). */
5047 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
5049 /* Work around gold/15646. */
5052 if (!is_static
&& global_seen
)
5058 /* Only check the symbol's kind if it has one. */
5063 case VARIABLES_DOMAIN
:
5064 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
5067 case FUNCTIONS_DOMAIN
:
5068 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
5072 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
5080 /* Don't crash on bad data. */
5081 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
5082 + dwarf2_per_objfile
->all_type_units
.size ()))
5084 complaint (&symfile_complaints
,
5085 _(".gdb_index entry has bad CU index"
5087 objfile_name (dwarf2_per_objfile
->objfile
));
5091 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
5092 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5097 /* If FILE_MATCHER is non-NULL, set all the
5098 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
5099 that match FILE_MATCHER. */
5102 dw_expand_symtabs_matching_file_matcher
5103 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5104 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
5106 if (file_matcher
== NULL
)
5109 objfile
*const objfile
= dwarf2_per_objfile
->objfile
;
5111 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
5113 NULL
, xcalloc
, xfree
));
5114 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
5116 NULL
, xcalloc
, xfree
));
5118 /* The rule is CUs specify all the files, including those used by
5119 any TU, so there's no need to scan TUs here. */
5121 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5125 per_cu
->v
.quick
->mark
= 0;
5127 /* We only need to look at symtabs not already expanded. */
5128 if (per_cu
->v
.quick
->compunit_symtab
)
5131 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5132 if (file_data
== NULL
)
5135 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
5137 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
5139 per_cu
->v
.quick
->mark
= 1;
5143 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5145 const char *this_real_name
;
5147 if (file_matcher (file_data
->file_names
[j
], false))
5149 per_cu
->v
.quick
->mark
= 1;
5153 /* Before we invoke realpath, which can get expensive when many
5154 files are involved, do a quick comparison of the basenames. */
5155 if (!basenames_may_differ
5156 && !file_matcher (lbasename (file_data
->file_names
[j
]),
5160 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
5161 if (file_matcher (this_real_name
, false))
5163 per_cu
->v
.quick
->mark
= 1;
5168 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
5169 ? visited_found
.get ()
5170 : visited_not_found
.get (),
5177 dw2_expand_symtabs_matching
5178 (struct objfile
*objfile
,
5179 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5180 const lookup_name_info
&lookup_name
,
5181 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5182 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5183 enum search_domain kind
)
5185 struct dwarf2_per_objfile
*dwarf2_per_objfile
5186 = get_dwarf2_per_objfile (objfile
);
5188 /* index_table is NULL if OBJF_READNOW. */
5189 if (!dwarf2_per_objfile
->index_table
)
5192 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5194 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5196 dw2_expand_symtabs_matching_symbol (index
, lookup_name
,
5198 kind
, [&] (offset_type idx
)
5200 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
5201 expansion_notify
, kind
);
5205 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
5208 static struct compunit_symtab
*
5209 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
5214 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
5215 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
5218 if (cust
->includes
== NULL
)
5221 for (i
= 0; cust
->includes
[i
]; ++i
)
5223 struct compunit_symtab
*s
= cust
->includes
[i
];
5225 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
5233 static struct compunit_symtab
*
5234 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
5235 struct bound_minimal_symbol msymbol
,
5237 struct obj_section
*section
,
5240 struct dwarf2_per_cu_data
*data
;
5241 struct compunit_symtab
*result
;
5243 if (!objfile
->psymtabs_addrmap
)
5246 data
= (struct dwarf2_per_cu_data
*) addrmap_find (objfile
->psymtabs_addrmap
,
5251 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
5252 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
5253 paddress (get_objfile_arch (objfile
), pc
));
5256 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
,
5259 gdb_assert (result
!= NULL
);
5264 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
5265 void *data
, int need_fullname
)
5267 struct dwarf2_per_objfile
*dwarf2_per_objfile
5268 = get_dwarf2_per_objfile (objfile
);
5270 if (!dwarf2_per_objfile
->filenames_cache
)
5272 dwarf2_per_objfile
->filenames_cache
.emplace ();
5274 htab_up
visited (htab_create_alloc (10,
5275 htab_hash_pointer
, htab_eq_pointer
,
5276 NULL
, xcalloc
, xfree
));
5278 /* The rule is CUs specify all the files, including those used
5279 by any TU, so there's no need to scan TUs here. We can
5280 ignore file names coming from already-expanded CUs. */
5282 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5284 if (per_cu
->v
.quick
->compunit_symtab
)
5286 void **slot
= htab_find_slot (visited
.get (),
5287 per_cu
->v
.quick
->file_names
,
5290 *slot
= per_cu
->v
.quick
->file_names
;
5294 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5296 /* We only need to look at symtabs not already expanded. */
5297 if (per_cu
->v
.quick
->compunit_symtab
)
5300 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5301 if (file_data
== NULL
)
5304 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
5307 /* Already visited. */
5312 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5314 const char *filename
= file_data
->file_names
[j
];
5315 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
5320 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
5322 gdb::unique_xmalloc_ptr
<char> this_real_name
;
5325 this_real_name
= gdb_realpath (filename
);
5326 (*fun
) (filename
, this_real_name
.get (), data
);
5331 dw2_has_symbols (struct objfile
*objfile
)
5336 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
5339 dw2_find_last_source_symtab
,
5340 dw2_forget_cached_source_info
,
5341 dw2_map_symtabs_matching_filename
,
5346 dw2_expand_symtabs_for_function
,
5347 dw2_expand_all_symtabs
,
5348 dw2_expand_symtabs_with_fullname
,
5349 dw2_map_matching_symbols
,
5350 dw2_expand_symtabs_matching
,
5351 dw2_find_pc_sect_compunit_symtab
,
5353 dw2_map_symbol_filenames
5356 /* DWARF-5 debug_names reader. */
5358 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
5359 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
5361 /* A helper function that reads the .debug_names section in SECTION
5362 and fills in MAP. FILENAME is the name of the file containing the
5363 section; it is used for error reporting.
5365 Returns true if all went well, false otherwise. */
5368 read_debug_names_from_section (struct objfile
*objfile
,
5369 const char *filename
,
5370 struct dwarf2_section_info
*section
,
5371 mapped_debug_names
&map
)
5373 if (dwarf2_section_empty_p (section
))
5376 /* Older elfutils strip versions could keep the section in the main
5377 executable while splitting it for the separate debug info file. */
5378 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
5381 dwarf2_read_section (objfile
, section
);
5383 map
.dwarf5_byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
5385 const gdb_byte
*addr
= section
->buffer
;
5387 bfd
*const abfd
= get_section_bfd_owner (section
);
5389 unsigned int bytes_read
;
5390 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
5393 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
5394 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
5395 if (bytes_read
+ length
!= section
->size
)
5397 /* There may be multiple per-CU indices. */
5398 warning (_("Section .debug_names in %s length %s does not match "
5399 "section length %s, ignoring .debug_names."),
5400 filename
, plongest (bytes_read
+ length
),
5401 pulongest (section
->size
));
5405 /* The version number. */
5406 uint16_t version
= read_2_bytes (abfd
, addr
);
5410 warning (_("Section .debug_names in %s has unsupported version %d, "
5411 "ignoring .debug_names."),
5417 uint16_t padding
= read_2_bytes (abfd
, addr
);
5421 warning (_("Section .debug_names in %s has unsupported padding %d, "
5422 "ignoring .debug_names."),
5427 /* comp_unit_count - The number of CUs in the CU list. */
5428 map
.cu_count
= read_4_bytes (abfd
, addr
);
5431 /* local_type_unit_count - The number of TUs in the local TU
5433 map
.tu_count
= read_4_bytes (abfd
, addr
);
5436 /* foreign_type_unit_count - The number of TUs in the foreign TU
5438 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
5440 if (foreign_tu_count
!= 0)
5442 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
5443 "ignoring .debug_names."),
5444 filename
, static_cast<unsigned long> (foreign_tu_count
));
5448 /* bucket_count - The number of hash buckets in the hash lookup
5450 map
.bucket_count
= read_4_bytes (abfd
, addr
);
5453 /* name_count - The number of unique names in the index. */
5454 map
.name_count
= read_4_bytes (abfd
, addr
);
5457 /* abbrev_table_size - The size in bytes of the abbreviations
5459 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
5462 /* augmentation_string_size - The size in bytes of the augmentation
5463 string. This value is rounded up to a multiple of 4. */
5464 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
5466 map
.augmentation_is_gdb
= ((augmentation_string_size
5467 == sizeof (dwarf5_augmentation
))
5468 && memcmp (addr
, dwarf5_augmentation
,
5469 sizeof (dwarf5_augmentation
)) == 0);
5470 augmentation_string_size
+= (-augmentation_string_size
) & 3;
5471 addr
+= augmentation_string_size
;
5474 map
.cu_table_reordered
= addr
;
5475 addr
+= map
.cu_count
* map
.offset_size
;
5477 /* List of Local TUs */
5478 map
.tu_table_reordered
= addr
;
5479 addr
+= map
.tu_count
* map
.offset_size
;
5481 /* Hash Lookup Table */
5482 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5483 addr
+= map
.bucket_count
* 4;
5484 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5485 addr
+= map
.name_count
* 4;
5488 map
.name_table_string_offs_reordered
= addr
;
5489 addr
+= map
.name_count
* map
.offset_size
;
5490 map
.name_table_entry_offs_reordered
= addr
;
5491 addr
+= map
.name_count
* map
.offset_size
;
5493 const gdb_byte
*abbrev_table_start
= addr
;
5496 unsigned int bytes_read
;
5497 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5502 const auto insertpair
5503 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5504 if (!insertpair
.second
)
5506 warning (_("Section .debug_names in %s has duplicate index %s, "
5507 "ignoring .debug_names."),
5508 filename
, pulongest (index_num
));
5511 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5512 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5517 mapped_debug_names::index_val::attr attr
;
5518 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5520 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5522 if (attr
.form
== DW_FORM_implicit_const
)
5524 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5528 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5530 indexval
.attr_vec
.push_back (std::move (attr
));
5533 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5535 warning (_("Section .debug_names in %s has abbreviation_table "
5536 "of size %zu vs. written as %u, ignoring .debug_names."),
5537 filename
, addr
- abbrev_table_start
, abbrev_table_size
);
5540 map
.entry_pool
= addr
;
5545 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5549 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5550 const mapped_debug_names
&map
,
5551 dwarf2_section_info
§ion
,
5554 sect_offset sect_off_prev
;
5555 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5557 sect_offset sect_off_next
;
5558 if (i
< map
.cu_count
)
5561 = (sect_offset
) (extract_unsigned_integer
5562 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5564 map
.dwarf5_byte_order
));
5567 sect_off_next
= (sect_offset
) section
.size
;
5570 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5571 dwarf2_per_cu_data
*per_cu
5572 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5573 sect_off_prev
, length
);
5574 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5576 sect_off_prev
= sect_off_next
;
5580 /* Read the CU list from the mapped index, and use it to create all
5581 the CU objects for this dwarf2_per_objfile. */
5584 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5585 const mapped_debug_names
&map
,
5586 const mapped_debug_names
&dwz_map
)
5588 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
5589 dwarf2_per_objfile
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5591 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5592 dwarf2_per_objfile
->info
,
5593 false /* is_dwz */);
5595 if (dwz_map
.cu_count
== 0)
5598 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5599 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5603 /* Read .debug_names. If everything went ok, initialize the "quick"
5604 elements of all the CUs and return true. Otherwise, return false. */
5607 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5609 std::unique_ptr
<mapped_debug_names
> map
5610 (new mapped_debug_names (dwarf2_per_objfile
));
5611 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5612 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5614 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5615 &dwarf2_per_objfile
->debug_names
,
5619 /* Don't use the index if it's empty. */
5620 if (map
->name_count
== 0)
5623 /* If there is a .dwz file, read it so we can get its CU list as
5625 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5628 if (!read_debug_names_from_section (objfile
,
5629 bfd_get_filename (dwz
->dwz_bfd
),
5630 &dwz
->debug_names
, dwz_map
))
5632 warning (_("could not read '.debug_names' section from %s; skipping"),
5633 bfd_get_filename (dwz
->dwz_bfd
));
5638 create_cus_from_debug_names (dwarf2_per_objfile
, *map
, dwz_map
);
5640 if (map
->tu_count
!= 0)
5642 /* We can only handle a single .debug_types when we have an
5644 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
5647 dwarf2_section_info
*section
= VEC_index (dwarf2_section_info_def
,
5648 dwarf2_per_objfile
->types
, 0);
5650 create_signatured_type_table_from_debug_names
5651 (dwarf2_per_objfile
, *map
, section
, &dwarf2_per_objfile
->abbrev
);
5654 create_addrmap_from_aranges (dwarf2_per_objfile
,
5655 &dwarf2_per_objfile
->debug_aranges
);
5657 dwarf2_per_objfile
->debug_names_table
= std::move (map
);
5658 dwarf2_per_objfile
->using_index
= 1;
5659 dwarf2_per_objfile
->quick_file_names_table
=
5660 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
5665 /* Type used to manage iterating over all CUs looking for a symbol for
5668 class dw2_debug_names_iterator
5671 /* If WANT_SPECIFIC_BLOCK is true, only look for symbols in block
5672 BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
5673 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5674 bool want_specific_block
,
5675 block_enum block_index
, domain_enum domain
,
5677 : m_map (map
), m_want_specific_block (want_specific_block
),
5678 m_block_index (block_index
), m_domain (domain
),
5679 m_addr (find_vec_in_debug_names (map
, name
))
5682 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5683 search_domain search
, uint32_t namei
)
5686 m_addr (find_vec_in_debug_names (map
, namei
))
5689 /* Return the next matching CU or NULL if there are no more. */
5690 dwarf2_per_cu_data
*next ();
5693 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5695 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5698 /* The internalized form of .debug_names. */
5699 const mapped_debug_names
&m_map
;
5701 /* If true, only look for symbols that match BLOCK_INDEX. */
5702 const bool m_want_specific_block
= false;
5704 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
5705 Unused if !WANT_SPECIFIC_BLOCK - FIRST_LOCAL_BLOCK is an invalid
5707 const block_enum m_block_index
= FIRST_LOCAL_BLOCK
;
5709 /* The kind of symbol we're looking for. */
5710 const domain_enum m_domain
= UNDEF_DOMAIN
;
5711 const search_domain m_search
= ALL_DOMAIN
;
5713 /* The list of CUs from the index entry of the symbol, or NULL if
5715 const gdb_byte
*m_addr
;
5719 mapped_debug_names::namei_to_name (uint32_t namei
) const
5721 const ULONGEST namei_string_offs
5722 = extract_unsigned_integer ((name_table_string_offs_reordered
5723 + namei
* offset_size
),
5726 return read_indirect_string_at_offset
5727 (dwarf2_per_objfile
, dwarf2_per_objfile
->objfile
->obfd
, namei_string_offs
);
5730 /* Find a slot in .debug_names for the object named NAME. If NAME is
5731 found, return pointer to its pool data. If NAME cannot be found,
5735 dw2_debug_names_iterator::find_vec_in_debug_names
5736 (const mapped_debug_names
&map
, const char *name
)
5738 int (*cmp
) (const char *, const char *);
5740 if (current_language
->la_language
== language_cplus
5741 || current_language
->la_language
== language_fortran
5742 || current_language
->la_language
== language_d
)
5744 /* NAME is already canonical. Drop any qualifiers as
5745 .debug_names does not contain any. */
5747 if (strchr (name
, '(') != NULL
)
5749 gdb::unique_xmalloc_ptr
<char> without_params
5750 = cp_remove_params (name
);
5752 if (without_params
!= NULL
)
5754 name
= without_params
.get();
5759 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5761 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5763 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5764 (map
.bucket_table_reordered
5765 + (full_hash
% map
.bucket_count
)), 4,
5766 map
.dwarf5_byte_order
);
5770 if (namei
>= map
.name_count
)
5772 complaint (&symfile_complaints
,
5773 _("Wrong .debug_names with name index %u but name_count=%u "
5775 namei
, map
.name_count
,
5776 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5782 const uint32_t namei_full_hash
5783 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5784 (map
.hash_table_reordered
+ namei
), 4,
5785 map
.dwarf5_byte_order
);
5786 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5789 if (full_hash
== namei_full_hash
)
5791 const char *const namei_string
= map
.namei_to_name (namei
);
5793 #if 0 /* An expensive sanity check. */
5794 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5796 complaint (&symfile_complaints
,
5797 _("Wrong .debug_names hash for string at index %u "
5799 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5804 if (cmp (namei_string
, name
) == 0)
5806 const ULONGEST namei_entry_offs
5807 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5808 + namei
* map
.offset_size
),
5809 map
.offset_size
, map
.dwarf5_byte_order
);
5810 return map
.entry_pool
+ namei_entry_offs
;
5815 if (namei
>= map
.name_count
)
5821 dw2_debug_names_iterator::find_vec_in_debug_names
5822 (const mapped_debug_names
&map
, uint32_t namei
)
5824 if (namei
>= map
.name_count
)
5826 complaint (&symfile_complaints
,
5827 _("Wrong .debug_names with name index %u but name_count=%u "
5829 namei
, map
.name_count
,
5830 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5834 const ULONGEST namei_entry_offs
5835 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5836 + namei
* map
.offset_size
),
5837 map
.offset_size
, map
.dwarf5_byte_order
);
5838 return map
.entry_pool
+ namei_entry_offs
;
5841 /* See dw2_debug_names_iterator. */
5843 dwarf2_per_cu_data
*
5844 dw2_debug_names_iterator::next ()
5849 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5850 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5851 bfd
*const abfd
= objfile
->obfd
;
5855 unsigned int bytes_read
;
5856 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5857 m_addr
+= bytes_read
;
5861 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5862 if (indexval_it
== m_map
.abbrev_map
.cend ())
5864 complaint (&symfile_complaints
,
5865 _("Wrong .debug_names undefined abbrev code %s "
5867 pulongest (abbrev
), objfile_name (objfile
));
5870 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5871 bool have_is_static
= false;
5873 dwarf2_per_cu_data
*per_cu
= NULL
;
5874 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5879 case DW_FORM_implicit_const
:
5880 ull
= attr
.implicit_const
;
5882 case DW_FORM_flag_present
:
5886 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5887 m_addr
+= bytes_read
;
5890 complaint (&symfile_complaints
,
5891 _("Unsupported .debug_names form %s [in module %s]"),
5892 dwarf_form_name (attr
.form
),
5893 objfile_name (objfile
));
5896 switch (attr
.dw_idx
)
5898 case DW_IDX_compile_unit
:
5899 /* Don't crash on bad data. */
5900 if (ull
>= dwarf2_per_objfile
->all_comp_units
.size ())
5902 complaint (&symfile_complaints
,
5903 _(".debug_names entry has bad CU index %s"
5906 objfile_name (dwarf2_per_objfile
->objfile
));
5909 per_cu
= dwarf2_per_objfile
->get_cutu (ull
);
5911 case DW_IDX_type_unit
:
5912 /* Don't crash on bad data. */
5913 if (ull
>= dwarf2_per_objfile
->all_type_units
.size ())
5915 complaint (&symfile_complaints
,
5916 _(".debug_names entry has bad TU index %s"
5919 objfile_name (dwarf2_per_objfile
->objfile
));
5922 per_cu
= &dwarf2_per_objfile
->get_tu (ull
)->per_cu
;
5924 case DW_IDX_GNU_internal
:
5925 if (!m_map
.augmentation_is_gdb
)
5927 have_is_static
= true;
5930 case DW_IDX_GNU_external
:
5931 if (!m_map
.augmentation_is_gdb
)
5933 have_is_static
= true;
5939 /* Skip if already read in. */
5940 if (per_cu
->v
.quick
->compunit_symtab
)
5943 /* Check static vs global. */
5946 const bool want_static
= m_block_index
!= GLOBAL_BLOCK
;
5947 if (m_want_specific_block
&& want_static
!= is_static
)
5951 /* Match dw2_symtab_iter_next, symbol_kind
5952 and debug_names::psymbol_tag. */
5956 switch (indexval
.dwarf_tag
)
5958 case DW_TAG_variable
:
5959 case DW_TAG_subprogram
:
5960 /* Some types are also in VAR_DOMAIN. */
5961 case DW_TAG_typedef
:
5962 case DW_TAG_structure_type
:
5969 switch (indexval
.dwarf_tag
)
5971 case DW_TAG_typedef
:
5972 case DW_TAG_structure_type
:
5979 switch (indexval
.dwarf_tag
)
5982 case DW_TAG_variable
:
5992 /* Match dw2_expand_symtabs_matching, symbol_kind and
5993 debug_names::psymbol_tag. */
5996 case VARIABLES_DOMAIN
:
5997 switch (indexval
.dwarf_tag
)
5999 case DW_TAG_variable
:
6005 case FUNCTIONS_DOMAIN
:
6006 switch (indexval
.dwarf_tag
)
6008 case DW_TAG_subprogram
:
6015 switch (indexval
.dwarf_tag
)
6017 case DW_TAG_typedef
:
6018 case DW_TAG_structure_type
:
6031 static struct compunit_symtab
*
6032 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, int block_index_int
,
6033 const char *name
, domain_enum domain
)
6035 const block_enum block_index
= static_cast<block_enum
> (block_index_int
);
6036 struct dwarf2_per_objfile
*dwarf2_per_objfile
6037 = get_dwarf2_per_objfile (objfile
);
6039 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
6042 /* index is NULL if OBJF_READNOW. */
6045 const auto &map
= *mapp
;
6047 dw2_debug_names_iterator
iter (map
, true /* want_specific_block */,
6048 block_index
, domain
, name
);
6050 struct compunit_symtab
*stab_best
= NULL
;
6051 struct dwarf2_per_cu_data
*per_cu
;
6052 while ((per_cu
= iter
.next ()) != NULL
)
6054 struct symbol
*sym
, *with_opaque
= NULL
;
6055 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
6056 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
6057 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
6059 sym
= block_find_symbol (block
, name
, domain
,
6060 block_find_non_opaque_type_preferred
,
6063 /* Some caution must be observed with overloaded functions and
6064 methods, since the index will not contain any overload
6065 information (but NAME might contain it). */
6068 && strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
6070 if (with_opaque
!= NULL
6071 && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque
), name
) == 0)
6074 /* Keep looking through other CUs. */
6080 /* This dumps minimal information about .debug_names. It is called
6081 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
6082 uses this to verify that .debug_names has been loaded. */
6085 dw2_debug_names_dump (struct objfile
*objfile
)
6087 struct dwarf2_per_objfile
*dwarf2_per_objfile
6088 = get_dwarf2_per_objfile (objfile
);
6090 gdb_assert (dwarf2_per_objfile
->using_index
);
6091 printf_filtered (".debug_names:");
6092 if (dwarf2_per_objfile
->debug_names_table
)
6093 printf_filtered (" exists\n");
6095 printf_filtered (" faked for \"readnow\"\n");
6096 printf_filtered ("\n");
6100 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
6101 const char *func_name
)
6103 struct dwarf2_per_objfile
*dwarf2_per_objfile
6104 = get_dwarf2_per_objfile (objfile
);
6106 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
6107 if (dwarf2_per_objfile
->debug_names_table
)
6109 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6111 /* Note: It doesn't matter what we pass for block_index here. */
6112 dw2_debug_names_iterator
iter (map
, false /* want_specific_block */,
6113 GLOBAL_BLOCK
, VAR_DOMAIN
, func_name
);
6115 struct dwarf2_per_cu_data
*per_cu
;
6116 while ((per_cu
= iter
.next ()) != NULL
)
6117 dw2_instantiate_symtab (per_cu
, false);
6122 dw2_debug_names_expand_symtabs_matching
6123 (struct objfile
*objfile
,
6124 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
6125 const lookup_name_info
&lookup_name
,
6126 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
6127 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
6128 enum search_domain kind
)
6130 struct dwarf2_per_objfile
*dwarf2_per_objfile
6131 = get_dwarf2_per_objfile (objfile
);
6133 /* debug_names_table is NULL if OBJF_READNOW. */
6134 if (!dwarf2_per_objfile
->debug_names_table
)
6137 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
6139 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6141 dw2_expand_symtabs_matching_symbol (map
, lookup_name
,
6143 kind
, [&] (offset_type namei
)
6145 /* The name was matched, now expand corresponding CUs that were
6147 dw2_debug_names_iterator
iter (map
, kind
, namei
);
6149 struct dwarf2_per_cu_data
*per_cu
;
6150 while ((per_cu
= iter
.next ()) != NULL
)
6151 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
6156 const struct quick_symbol_functions dwarf2_debug_names_functions
=
6159 dw2_find_last_source_symtab
,
6160 dw2_forget_cached_source_info
,
6161 dw2_map_symtabs_matching_filename
,
6162 dw2_debug_names_lookup_symbol
,
6164 dw2_debug_names_dump
,
6166 dw2_debug_names_expand_symtabs_for_function
,
6167 dw2_expand_all_symtabs
,
6168 dw2_expand_symtabs_with_fullname
,
6169 dw2_map_matching_symbols
,
6170 dw2_debug_names_expand_symtabs_matching
,
6171 dw2_find_pc_sect_compunit_symtab
,
6173 dw2_map_symbol_filenames
6176 /* See symfile.h. */
6179 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
6181 struct dwarf2_per_objfile
*dwarf2_per_objfile
6182 = get_dwarf2_per_objfile (objfile
);
6184 /* If we're about to read full symbols, don't bother with the
6185 indices. In this case we also don't care if some other debug
6186 format is making psymtabs, because they are all about to be
6188 if ((objfile
->flags
& OBJF_READNOW
))
6190 dwarf2_per_objfile
->using_index
= 1;
6191 create_all_comp_units (dwarf2_per_objfile
);
6192 create_all_type_units (dwarf2_per_objfile
);
6193 dwarf2_per_objfile
->quick_file_names_table
6194 = create_quick_file_names_table
6195 (dwarf2_per_objfile
->all_comp_units
.size ());
6197 for (int i
= 0; i
< (dwarf2_per_objfile
->all_comp_units
.size ()
6198 + dwarf2_per_objfile
->all_type_units
.size ()); ++i
)
6200 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
6202 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6203 struct dwarf2_per_cu_quick_data
);
6206 /* Return 1 so that gdb sees the "quick" functions. However,
6207 these functions will be no-ops because we will have expanded
6209 *index_kind
= dw_index_kind::GDB_INDEX
;
6213 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
6215 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6219 if (dwarf2_read_index (dwarf2_per_objfile
))
6221 *index_kind
= dw_index_kind::GDB_INDEX
;
6230 /* Build a partial symbol table. */
6233 dwarf2_build_psymtabs (struct objfile
*objfile
)
6235 struct dwarf2_per_objfile
*dwarf2_per_objfile
6236 = get_dwarf2_per_objfile (objfile
);
6238 if (objfile
->global_psymbols
.capacity () == 0
6239 && objfile
->static_psymbols
.capacity () == 0)
6240 init_psymbol_list (objfile
, 1024);
6244 /* This isn't really ideal: all the data we allocate on the
6245 objfile's obstack is still uselessly kept around. However,
6246 freeing it seems unsafe. */
6247 psymtab_discarder
psymtabs (objfile
);
6248 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
6251 CATCH (except
, RETURN_MASK_ERROR
)
6253 exception_print (gdb_stderr
, except
);
6258 /* Return the total length of the CU described by HEADER. */
6261 get_cu_length (const struct comp_unit_head
*header
)
6263 return header
->initial_length_size
+ header
->length
;
6266 /* Return TRUE if SECT_OFF is within CU_HEADER. */
6269 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
6271 sect_offset bottom
= cu_header
->sect_off
;
6272 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
6274 return sect_off
>= bottom
&& sect_off
< top
;
6277 /* Find the base address of the compilation unit for range lists and
6278 location lists. It will normally be specified by DW_AT_low_pc.
6279 In DWARF-3 draft 4, the base address could be overridden by
6280 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6281 compilation units with discontinuous ranges. */
6284 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6286 struct attribute
*attr
;
6289 cu
->base_address
= 0;
6291 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6294 cu
->base_address
= attr_value_as_address (attr
);
6299 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6302 cu
->base_address
= attr_value_as_address (attr
);
6308 /* Read in the comp unit header information from the debug_info at info_ptr.
6309 Use rcuh_kind::COMPILE as the default type if not known by the caller.
6310 NOTE: This leaves members offset, first_die_offset to be filled in
6313 static const gdb_byte
*
6314 read_comp_unit_head (struct comp_unit_head
*cu_header
,
6315 const gdb_byte
*info_ptr
,
6316 struct dwarf2_section_info
*section
,
6317 rcuh_kind section_kind
)
6320 unsigned int bytes_read
;
6321 const char *filename
= get_section_file_name (section
);
6322 bfd
*abfd
= get_section_bfd_owner (section
);
6324 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
6325 cu_header
->initial_length_size
= bytes_read
;
6326 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
6327 info_ptr
+= bytes_read
;
6328 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
6330 if (cu_header
->version
< 5)
6331 switch (section_kind
)
6333 case rcuh_kind::COMPILE
:
6334 cu_header
->unit_type
= DW_UT_compile
;
6336 case rcuh_kind::TYPE
:
6337 cu_header
->unit_type
= DW_UT_type
;
6340 internal_error (__FILE__
, __LINE__
,
6341 _("read_comp_unit_head: invalid section_kind"));
6345 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
6346 (read_1_byte (abfd
, info_ptr
));
6348 switch (cu_header
->unit_type
)
6351 if (section_kind
!= rcuh_kind::COMPILE
)
6352 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6353 "(is DW_UT_compile, should be DW_UT_type) [in module %s]"),
6357 section_kind
= rcuh_kind::TYPE
;
6360 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6361 "(is %d, should be %d or %d) [in module %s]"),
6362 cu_header
->unit_type
, DW_UT_compile
, DW_UT_type
, filename
);
6365 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6368 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
6371 info_ptr
+= bytes_read
;
6372 if (cu_header
->version
< 5)
6374 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6377 signed_addr
= bfd_get_sign_extend_vma (abfd
);
6378 if (signed_addr
< 0)
6379 internal_error (__FILE__
, __LINE__
,
6380 _("read_comp_unit_head: dwarf from non elf file"));
6381 cu_header
->signed_addr_p
= signed_addr
;
6383 if (section_kind
== rcuh_kind::TYPE
)
6385 LONGEST type_offset
;
6387 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
6390 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
6391 info_ptr
+= bytes_read
;
6392 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
6393 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
6394 error (_("Dwarf Error: Too big type_offset in compilation unit "
6395 "header (is %s) [in module %s]"), plongest (type_offset
),
6402 /* Helper function that returns the proper abbrev section for
6405 static struct dwarf2_section_info
*
6406 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6408 struct dwarf2_section_info
*abbrev
;
6409 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6411 if (this_cu
->is_dwz
)
6412 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
6414 abbrev
= &dwarf2_per_objfile
->abbrev
;
6419 /* Subroutine of read_and_check_comp_unit_head and
6420 read_and_check_type_unit_head to simplify them.
6421 Perform various error checking on the header. */
6424 error_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6425 struct comp_unit_head
*header
,
6426 struct dwarf2_section_info
*section
,
6427 struct dwarf2_section_info
*abbrev_section
)
6429 const char *filename
= get_section_file_name (section
);
6431 if (header
->version
< 2 || header
->version
> 5)
6432 error (_("Dwarf Error: wrong version in compilation unit header "
6433 "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header
->version
,
6436 if (to_underlying (header
->abbrev_sect_off
)
6437 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
6438 error (_("Dwarf Error: bad offset (%s) in compilation unit header "
6439 "(offset %s + 6) [in module %s]"),
6440 sect_offset_str (header
->abbrev_sect_off
),
6441 sect_offset_str (header
->sect_off
),
6444 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
6445 avoid potential 32-bit overflow. */
6446 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
6448 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
6449 "(offset %s + 0) [in module %s]"),
6450 header
->length
, sect_offset_str (header
->sect_off
),
6454 /* Read in a CU/TU header and perform some basic error checking.
6455 The contents of the header are stored in HEADER.
6456 The result is a pointer to the start of the first DIE. */
6458 static const gdb_byte
*
6459 read_and_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6460 struct comp_unit_head
*header
,
6461 struct dwarf2_section_info
*section
,
6462 struct dwarf2_section_info
*abbrev_section
,
6463 const gdb_byte
*info_ptr
,
6464 rcuh_kind section_kind
)
6466 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
6468 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
6470 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
6472 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
6474 error_check_comp_unit_head (dwarf2_per_objfile
, header
, section
,
6480 /* Fetch the abbreviation table offset from a comp or type unit header. */
6483 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6484 struct dwarf2_section_info
*section
,
6485 sect_offset sect_off
)
6487 bfd
*abfd
= get_section_bfd_owner (section
);
6488 const gdb_byte
*info_ptr
;
6489 unsigned int initial_length_size
, offset_size
;
6492 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
6493 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6494 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6495 offset_size
= initial_length_size
== 4 ? 4 : 8;
6496 info_ptr
+= initial_length_size
;
6498 version
= read_2_bytes (abfd
, info_ptr
);
6502 /* Skip unit type and address size. */
6506 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
6509 /* Allocate a new partial symtab for file named NAME and mark this new
6510 partial symtab as being an include of PST. */
6513 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
6514 struct objfile
*objfile
)
6516 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
6518 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6520 /* It shares objfile->objfile_obstack. */
6521 subpst
->dirname
= pst
->dirname
;
6524 subpst
->textlow
= 0;
6525 subpst
->texthigh
= 0;
6527 subpst
->dependencies
6528 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
6529 subpst
->dependencies
[0] = pst
;
6530 subpst
->number_of_dependencies
= 1;
6532 subpst
->globals_offset
= 0;
6533 subpst
->n_global_syms
= 0;
6534 subpst
->statics_offset
= 0;
6535 subpst
->n_static_syms
= 0;
6536 subpst
->compunit_symtab
= NULL
;
6537 subpst
->read_symtab
= pst
->read_symtab
;
6540 /* No private part is necessary for include psymtabs. This property
6541 can be used to differentiate between such include psymtabs and
6542 the regular ones. */
6543 subpst
->read_symtab_private
= NULL
;
6546 /* Read the Line Number Program data and extract the list of files
6547 included by the source file represented by PST. Build an include
6548 partial symtab for each of these included files. */
6551 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6552 struct die_info
*die
,
6553 struct partial_symtab
*pst
)
6556 struct attribute
*attr
;
6558 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6560 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6562 return; /* No linetable, so no includes. */
6564 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
6565 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
6569 hash_signatured_type (const void *item
)
6571 const struct signatured_type
*sig_type
6572 = (const struct signatured_type
*) item
;
6574 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6575 return sig_type
->signature
;
6579 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6581 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6582 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6584 return lhs
->signature
== rhs
->signature
;
6587 /* Allocate a hash table for signatured types. */
6590 allocate_signatured_type_table (struct objfile
*objfile
)
6592 return htab_create_alloc_ex (41,
6593 hash_signatured_type
,
6596 &objfile
->objfile_obstack
,
6597 hashtab_obstack_allocate
,
6598 dummy_obstack_deallocate
);
6601 /* A helper function to add a signatured type CU to a table. */
6604 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6606 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6607 std::vector
<signatured_type
*> *all_type_units
6608 = (std::vector
<signatured_type
*> *) datum
;
6610 all_type_units
->push_back (sigt
);
6615 /* A helper for create_debug_types_hash_table. Read types from SECTION
6616 and fill them into TYPES_HTAB. It will process only type units,
6617 therefore DW_UT_type. */
6620 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6621 struct dwo_file
*dwo_file
,
6622 dwarf2_section_info
*section
, htab_t
&types_htab
,
6623 rcuh_kind section_kind
)
6625 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6626 struct dwarf2_section_info
*abbrev_section
;
6628 const gdb_byte
*info_ptr
, *end_ptr
;
6630 abbrev_section
= (dwo_file
!= NULL
6631 ? &dwo_file
->sections
.abbrev
6632 : &dwarf2_per_objfile
->abbrev
);
6634 if (dwarf_read_debug
)
6635 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6636 get_section_name (section
),
6637 get_section_file_name (abbrev_section
));
6639 dwarf2_read_section (objfile
, section
);
6640 info_ptr
= section
->buffer
;
6642 if (info_ptr
== NULL
)
6645 /* We can't set abfd until now because the section may be empty or
6646 not present, in which case the bfd is unknown. */
6647 abfd
= get_section_bfd_owner (section
);
6649 /* We don't use init_cutu_and_read_dies_simple, or some such, here
6650 because we don't need to read any dies: the signature is in the
6653 end_ptr
= info_ptr
+ section
->size
;
6654 while (info_ptr
< end_ptr
)
6656 struct signatured_type
*sig_type
;
6657 struct dwo_unit
*dwo_tu
;
6659 const gdb_byte
*ptr
= info_ptr
;
6660 struct comp_unit_head header
;
6661 unsigned int length
;
6663 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6665 /* Initialize it due to a false compiler warning. */
6666 header
.signature
= -1;
6667 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6669 /* We need to read the type's signature in order to build the hash
6670 table, but we don't need anything else just yet. */
6672 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6673 abbrev_section
, ptr
, section_kind
);
6675 length
= get_cu_length (&header
);
6677 /* Skip dummy type units. */
6678 if (ptr
>= info_ptr
+ length
6679 || peek_abbrev_code (abfd
, ptr
) == 0
6680 || header
.unit_type
!= DW_UT_type
)
6686 if (types_htab
== NULL
)
6689 types_htab
= allocate_dwo_unit_table (objfile
);
6691 types_htab
= allocate_signatured_type_table (objfile
);
6697 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6699 dwo_tu
->dwo_file
= dwo_file
;
6700 dwo_tu
->signature
= header
.signature
;
6701 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6702 dwo_tu
->section
= section
;
6703 dwo_tu
->sect_off
= sect_off
;
6704 dwo_tu
->length
= length
;
6708 /* N.B.: type_offset is not usable if this type uses a DWO file.
6709 The real type_offset is in the DWO file. */
6711 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6712 struct signatured_type
);
6713 sig_type
->signature
= header
.signature
;
6714 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6715 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6716 sig_type
->per_cu
.is_debug_types
= 1;
6717 sig_type
->per_cu
.section
= section
;
6718 sig_type
->per_cu
.sect_off
= sect_off
;
6719 sig_type
->per_cu
.length
= length
;
6722 slot
= htab_find_slot (types_htab
,
6723 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6725 gdb_assert (slot
!= NULL
);
6728 sect_offset dup_sect_off
;
6732 const struct dwo_unit
*dup_tu
6733 = (const struct dwo_unit
*) *slot
;
6735 dup_sect_off
= dup_tu
->sect_off
;
6739 const struct signatured_type
*dup_tu
6740 = (const struct signatured_type
*) *slot
;
6742 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6745 complaint (&symfile_complaints
,
6746 _("debug type entry at offset %s is duplicate to"
6747 " the entry at offset %s, signature %s"),
6748 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6749 hex_string (header
.signature
));
6751 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6753 if (dwarf_read_debug
> 1)
6754 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6755 sect_offset_str (sect_off
),
6756 hex_string (header
.signature
));
6762 /* Create the hash table of all entries in the .debug_types
6763 (or .debug_types.dwo) section(s).
6764 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6765 otherwise it is NULL.
6767 The result is a pointer to the hash table or NULL if there are no types.
6769 Note: This function processes DWO files only, not DWP files. */
6772 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6773 struct dwo_file
*dwo_file
,
6774 VEC (dwarf2_section_info_def
) *types
,
6778 struct dwarf2_section_info
*section
;
6780 if (VEC_empty (dwarf2_section_info_def
, types
))
6784 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
6786 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, section
,
6787 types_htab
, rcuh_kind::TYPE
);
6790 /* Create the hash table of all entries in the .debug_types section,
6791 and initialize all_type_units.
6792 The result is zero if there is an error (e.g. missing .debug_types section),
6793 otherwise non-zero. */
6796 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6798 htab_t types_htab
= NULL
;
6800 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6801 &dwarf2_per_objfile
->info
, types_htab
,
6802 rcuh_kind::COMPILE
);
6803 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6804 dwarf2_per_objfile
->types
, types_htab
);
6805 if (types_htab
== NULL
)
6807 dwarf2_per_objfile
->signatured_types
= NULL
;
6811 dwarf2_per_objfile
->signatured_types
= types_htab
;
6813 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
6814 dwarf2_per_objfile
->all_type_units
.reserve (htab_elements (types_htab
));
6816 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
,
6817 &dwarf2_per_objfile
->all_type_units
);
6822 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6823 If SLOT is non-NULL, it is the entry to use in the hash table.
6824 Otherwise we find one. */
6826 static struct signatured_type
*
6827 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6830 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6832 if (dwarf2_per_objfile
->all_type_units
.size ()
6833 == dwarf2_per_objfile
->all_type_units
.capacity ())
6834 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6836 signatured_type
*sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6837 struct signatured_type
);
6839 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
6840 sig_type
->signature
= sig
;
6841 sig_type
->per_cu
.is_debug_types
= 1;
6842 if (dwarf2_per_objfile
->using_index
)
6844 sig_type
->per_cu
.v
.quick
=
6845 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6846 struct dwarf2_per_cu_quick_data
);
6851 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6854 gdb_assert (*slot
== NULL
);
6856 /* The rest of sig_type must be filled in by the caller. */
6860 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6861 Fill in SIG_ENTRY with DWO_ENTRY. */
6864 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6865 struct signatured_type
*sig_entry
,
6866 struct dwo_unit
*dwo_entry
)
6868 /* Make sure we're not clobbering something we don't expect to. */
6869 gdb_assert (! sig_entry
->per_cu
.queued
);
6870 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6871 if (dwarf2_per_objfile
->using_index
)
6873 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6874 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6877 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6878 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6879 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6880 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6881 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6883 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6884 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6885 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6886 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6887 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6888 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6889 sig_entry
->dwo_unit
= dwo_entry
;
6892 /* Subroutine of lookup_signatured_type.
6893 If we haven't read the TU yet, create the signatured_type data structure
6894 for a TU to be read in directly from a DWO file, bypassing the stub.
6895 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6896 using .gdb_index, then when reading a CU we want to stay in the DWO file
6897 containing that CU. Otherwise we could end up reading several other DWO
6898 files (due to comdat folding) to process the transitive closure of all the
6899 mentioned TUs, and that can be slow. The current DWO file will have every
6900 type signature that it needs.
6901 We only do this for .gdb_index because in the psymtab case we already have
6902 to read all the DWOs to build the type unit groups. */
6904 static struct signatured_type
*
6905 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6907 struct dwarf2_per_objfile
*dwarf2_per_objfile
6908 = cu
->per_cu
->dwarf2_per_objfile
;
6909 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6910 struct dwo_file
*dwo_file
;
6911 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6912 struct signatured_type find_sig_entry
, *sig_entry
;
6915 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6917 /* If TU skeletons have been removed then we may not have read in any
6919 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6921 dwarf2_per_objfile
->signatured_types
6922 = allocate_signatured_type_table (objfile
);
6925 /* We only ever need to read in one copy of a signatured type.
6926 Use the global signatured_types array to do our own comdat-folding
6927 of types. If this is the first time we're reading this TU, and
6928 the TU has an entry in .gdb_index, replace the recorded data from
6929 .gdb_index with this TU. */
6931 find_sig_entry
.signature
= sig
;
6932 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6933 &find_sig_entry
, INSERT
);
6934 sig_entry
= (struct signatured_type
*) *slot
;
6936 /* We can get here with the TU already read, *or* in the process of being
6937 read. Don't reassign the global entry to point to this DWO if that's
6938 the case. Also note that if the TU is already being read, it may not
6939 have come from a DWO, the program may be a mix of Fission-compiled
6940 code and non-Fission-compiled code. */
6942 /* Have we already tried to read this TU?
6943 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6944 needn't exist in the global table yet). */
6945 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6948 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6949 dwo_unit of the TU itself. */
6950 dwo_file
= cu
->dwo_unit
->dwo_file
;
6952 /* Ok, this is the first time we're reading this TU. */
6953 if (dwo_file
->tus
== NULL
)
6955 find_dwo_entry
.signature
= sig
;
6956 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
6957 if (dwo_entry
== NULL
)
6960 /* If the global table doesn't have an entry for this TU, add one. */
6961 if (sig_entry
== NULL
)
6962 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6964 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6965 sig_entry
->per_cu
.tu_read
= 1;
6969 /* Subroutine of lookup_signatured_type.
6970 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6971 then try the DWP file. If the TU stub (skeleton) has been removed then
6972 it won't be in .gdb_index. */
6974 static struct signatured_type
*
6975 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6977 struct dwarf2_per_objfile
*dwarf2_per_objfile
6978 = cu
->per_cu
->dwarf2_per_objfile
;
6979 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6980 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
6981 struct dwo_unit
*dwo_entry
;
6982 struct signatured_type find_sig_entry
, *sig_entry
;
6985 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6986 gdb_assert (dwp_file
!= NULL
);
6988 /* If TU skeletons have been removed then we may not have read in any
6990 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6992 dwarf2_per_objfile
->signatured_types
6993 = allocate_signatured_type_table (objfile
);
6996 find_sig_entry
.signature
= sig
;
6997 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6998 &find_sig_entry
, INSERT
);
6999 sig_entry
= (struct signatured_type
*) *slot
;
7001 /* Have we already tried to read this TU?
7002 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
7003 needn't exist in the global table yet). */
7004 if (sig_entry
!= NULL
)
7007 if (dwp_file
->tus
== NULL
)
7009 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
7010 sig
, 1 /* is_debug_types */);
7011 if (dwo_entry
== NULL
)
7014 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
7015 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7020 /* Lookup a signature based type for DW_FORM_ref_sig8.
7021 Returns NULL if signature SIG is not present in the table.
7022 It is up to the caller to complain about this. */
7024 static struct signatured_type
*
7025 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7027 struct dwarf2_per_objfile
*dwarf2_per_objfile
7028 = cu
->per_cu
->dwarf2_per_objfile
;
7031 && dwarf2_per_objfile
->using_index
)
7033 /* We're in a DWO/DWP file, and we're using .gdb_index.
7034 These cases require special processing. */
7035 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
7036 return lookup_dwo_signatured_type (cu
, sig
);
7038 return lookup_dwp_signatured_type (cu
, sig
);
7042 struct signatured_type find_entry
, *entry
;
7044 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7046 find_entry
.signature
= sig
;
7047 entry
= ((struct signatured_type
*)
7048 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
7053 /* Low level DIE reading support. */
7055 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
7058 init_cu_die_reader (struct die_reader_specs
*reader
,
7059 struct dwarf2_cu
*cu
,
7060 struct dwarf2_section_info
*section
,
7061 struct dwo_file
*dwo_file
,
7062 struct abbrev_table
*abbrev_table
)
7064 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
7065 reader
->abfd
= get_section_bfd_owner (section
);
7067 reader
->dwo_file
= dwo_file
;
7068 reader
->die_section
= section
;
7069 reader
->buffer
= section
->buffer
;
7070 reader
->buffer_end
= section
->buffer
+ section
->size
;
7071 reader
->comp_dir
= NULL
;
7072 reader
->abbrev_table
= abbrev_table
;
7075 /* Subroutine of init_cutu_and_read_dies to simplify it.
7076 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
7077 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
7080 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
7081 from it to the DIE in the DWO. If NULL we are skipping the stub.
7082 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
7083 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
7084 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
7085 STUB_COMP_DIR may be non-NULL.
7086 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
7087 are filled in with the info of the DIE from the DWO file.
7088 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
7089 from the dwo. Since *RESULT_READER references this abbrev table, it must be
7090 kept around for at least as long as *RESULT_READER.
7092 The result is non-zero if a valid (non-dummy) DIE was found. */
7095 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
7096 struct dwo_unit
*dwo_unit
,
7097 struct die_info
*stub_comp_unit_die
,
7098 const char *stub_comp_dir
,
7099 struct die_reader_specs
*result_reader
,
7100 const gdb_byte
**result_info_ptr
,
7101 struct die_info
**result_comp_unit_die
,
7102 int *result_has_children
,
7103 abbrev_table_up
*result_dwo_abbrev_table
)
7105 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7106 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7107 struct dwarf2_cu
*cu
= this_cu
->cu
;
7109 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7110 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
7111 int i
,num_extra_attrs
;
7112 struct dwarf2_section_info
*dwo_abbrev_section
;
7113 struct attribute
*attr
;
7114 struct die_info
*comp_unit_die
;
7116 /* At most one of these may be provided. */
7117 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
7119 /* These attributes aren't processed until later:
7120 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
7121 DW_AT_comp_dir is used now, to find the DWO file, but it is also
7122 referenced later. However, these attributes are found in the stub
7123 which we won't have later. In order to not impose this complication
7124 on the rest of the code, we read them here and copy them to the
7133 if (stub_comp_unit_die
!= NULL
)
7135 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
7137 if (! this_cu
->is_debug_types
)
7138 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
7139 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
7140 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
7141 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
7142 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
7144 /* There should be a DW_AT_addr_base attribute here (if needed).
7145 We need the value before we can process DW_FORM_GNU_addr_index. */
7147 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
7149 cu
->addr_base
= DW_UNSND (attr
);
7151 /* There should be a DW_AT_ranges_base attribute here (if needed).
7152 We need the value before we can process DW_AT_ranges. */
7153 cu
->ranges_base
= 0;
7154 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
7156 cu
->ranges_base
= DW_UNSND (attr
);
7158 else if (stub_comp_dir
!= NULL
)
7160 /* Reconstruct the comp_dir attribute to simplify the code below. */
7161 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
7162 comp_dir
->name
= DW_AT_comp_dir
;
7163 comp_dir
->form
= DW_FORM_string
;
7164 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
7165 DW_STRING (comp_dir
) = stub_comp_dir
;
7168 /* Set up for reading the DWO CU/TU. */
7169 cu
->dwo_unit
= dwo_unit
;
7170 dwarf2_section_info
*section
= dwo_unit
->section
;
7171 dwarf2_read_section (objfile
, section
);
7172 abfd
= get_section_bfd_owner (section
);
7173 begin_info_ptr
= info_ptr
= (section
->buffer
7174 + to_underlying (dwo_unit
->sect_off
));
7175 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
7177 if (this_cu
->is_debug_types
)
7179 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
7181 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7182 &cu
->header
, section
,
7184 info_ptr
, rcuh_kind::TYPE
);
7185 /* This is not an assert because it can be caused by bad debug info. */
7186 if (sig_type
->signature
!= cu
->header
.signature
)
7188 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
7189 " TU at offset %s [in module %s]"),
7190 hex_string (sig_type
->signature
),
7191 hex_string (cu
->header
.signature
),
7192 sect_offset_str (dwo_unit
->sect_off
),
7193 bfd_get_filename (abfd
));
7195 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7196 /* For DWOs coming from DWP files, we don't know the CU length
7197 nor the type's offset in the TU until now. */
7198 dwo_unit
->length
= get_cu_length (&cu
->header
);
7199 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
7201 /* Establish the type offset that can be used to lookup the type.
7202 For DWO files, we don't know it until now. */
7203 sig_type
->type_offset_in_section
7204 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
7208 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7209 &cu
->header
, section
,
7211 info_ptr
, rcuh_kind::COMPILE
);
7212 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7213 /* For DWOs coming from DWP files, we don't know the CU length
7215 dwo_unit
->length
= get_cu_length (&cu
->header
);
7218 *result_dwo_abbrev_table
7219 = abbrev_table_read_table (dwarf2_per_objfile
, dwo_abbrev_section
,
7220 cu
->header
.abbrev_sect_off
);
7221 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
7222 result_dwo_abbrev_table
->get ());
7224 /* Read in the die, but leave space to copy over the attributes
7225 from the stub. This has the benefit of simplifying the rest of
7226 the code - all the work to maintain the illusion of a single
7227 DW_TAG_{compile,type}_unit DIE is done here. */
7228 num_extra_attrs
= ((stmt_list
!= NULL
)
7232 + (comp_dir
!= NULL
));
7233 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
7234 result_has_children
, num_extra_attrs
);
7236 /* Copy over the attributes from the stub to the DIE we just read in. */
7237 comp_unit_die
= *result_comp_unit_die
;
7238 i
= comp_unit_die
->num_attrs
;
7239 if (stmt_list
!= NULL
)
7240 comp_unit_die
->attrs
[i
++] = *stmt_list
;
7242 comp_unit_die
->attrs
[i
++] = *low_pc
;
7243 if (high_pc
!= NULL
)
7244 comp_unit_die
->attrs
[i
++] = *high_pc
;
7246 comp_unit_die
->attrs
[i
++] = *ranges
;
7247 if (comp_dir
!= NULL
)
7248 comp_unit_die
->attrs
[i
++] = *comp_dir
;
7249 comp_unit_die
->num_attrs
+= num_extra_attrs
;
7251 if (dwarf_die_debug
)
7253 fprintf_unfiltered (gdb_stdlog
,
7254 "Read die from %s@0x%x of %s:\n",
7255 get_section_name (section
),
7256 (unsigned) (begin_info_ptr
- section
->buffer
),
7257 bfd_get_filename (abfd
));
7258 dump_die (comp_unit_die
, dwarf_die_debug
);
7261 /* Save the comp_dir attribute. If there is no DWP file then we'll read
7262 TUs by skipping the stub and going directly to the entry in the DWO file.
7263 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
7264 to get it via circuitous means. Blech. */
7265 if (comp_dir
!= NULL
)
7266 result_reader
->comp_dir
= DW_STRING (comp_dir
);
7268 /* Skip dummy compilation units. */
7269 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
7270 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7273 *result_info_ptr
= info_ptr
;
7277 /* Subroutine of init_cutu_and_read_dies to simplify it.
7278 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
7279 Returns NULL if the specified DWO unit cannot be found. */
7281 static struct dwo_unit
*
7282 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
7283 struct die_info
*comp_unit_die
)
7285 struct dwarf2_cu
*cu
= this_cu
->cu
;
7287 struct dwo_unit
*dwo_unit
;
7288 const char *comp_dir
, *dwo_name
;
7290 gdb_assert (cu
!= NULL
);
7292 /* Yeah, we look dwo_name up again, but it simplifies the code. */
7293 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7294 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7296 if (this_cu
->is_debug_types
)
7298 struct signatured_type
*sig_type
;
7300 /* Since this_cu is the first member of struct signatured_type,
7301 we can go from a pointer to one to a pointer to the other. */
7302 sig_type
= (struct signatured_type
*) this_cu
;
7303 signature
= sig_type
->signature
;
7304 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
7308 struct attribute
*attr
;
7310 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
7312 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
7314 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
7315 signature
= DW_UNSND (attr
);
7316 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
7323 /* Subroutine of init_cutu_and_read_dies to simplify it.
7324 See it for a description of the parameters.
7325 Read a TU directly from a DWO file, bypassing the stub. */
7328 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
7329 int use_existing_cu
, int keep
,
7330 die_reader_func_ftype
*die_reader_func
,
7333 std::unique_ptr
<dwarf2_cu
> new_cu
;
7334 struct signatured_type
*sig_type
;
7335 struct die_reader_specs reader
;
7336 const gdb_byte
*info_ptr
;
7337 struct die_info
*comp_unit_die
;
7339 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7341 /* Verify we can do the following downcast, and that we have the
7343 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
7344 sig_type
= (struct signatured_type
*) this_cu
;
7345 gdb_assert (sig_type
->dwo_unit
!= NULL
);
7347 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7349 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
7350 /* There's no need to do the rereading_dwo_cu handling that
7351 init_cutu_and_read_dies does since we don't read the stub. */
7355 /* If !use_existing_cu, this_cu->cu must be NULL. */
7356 gdb_assert (this_cu
->cu
== NULL
);
7357 new_cu
.reset (new dwarf2_cu (this_cu
));
7360 /* A future optimization, if needed, would be to use an existing
7361 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
7362 could share abbrev tables. */
7364 /* The abbreviation table used by READER, this must live at least as long as
7366 abbrev_table_up dwo_abbrev_table
;
7368 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
7369 NULL
/* stub_comp_unit_die */,
7370 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
7372 &comp_unit_die
, &has_children
,
7373 &dwo_abbrev_table
) == 0)
7379 /* All the "real" work is done here. */
7380 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7382 /* This duplicates the code in init_cutu_and_read_dies,
7383 but the alternative is making the latter more complex.
7384 This function is only for the special case of using DWO files directly:
7385 no point in overly complicating the general case just to handle this. */
7386 if (new_cu
!= NULL
&& keep
)
7388 /* Link this CU into read_in_chain. */
7389 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7390 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7391 /* The chain owns it now. */
7396 /* Initialize a CU (or TU) and read its DIEs.
7397 If the CU defers to a DWO file, read the DWO file as well.
7399 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
7400 Otherwise the table specified in the comp unit header is read in and used.
7401 This is an optimization for when we already have the abbrev table.
7403 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
7404 Otherwise, a new CU is allocated with xmalloc.
7406 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
7407 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
7409 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7410 linker) then DIE_READER_FUNC will not get called. */
7413 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
7414 struct abbrev_table
*abbrev_table
,
7415 int use_existing_cu
, int keep
,
7417 die_reader_func_ftype
*die_reader_func
,
7420 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7421 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7422 struct dwarf2_section_info
*section
= this_cu
->section
;
7423 bfd
*abfd
= get_section_bfd_owner (section
);
7424 struct dwarf2_cu
*cu
;
7425 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7426 struct die_reader_specs reader
;
7427 struct die_info
*comp_unit_die
;
7429 struct attribute
*attr
;
7430 struct signatured_type
*sig_type
= NULL
;
7431 struct dwarf2_section_info
*abbrev_section
;
7432 /* Non-zero if CU currently points to a DWO file and we need to
7433 reread it. When this happens we need to reread the skeleton die
7434 before we can reread the DWO file (this only applies to CUs, not TUs). */
7435 int rereading_dwo_cu
= 0;
7437 if (dwarf_die_debug
)
7438 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7439 this_cu
->is_debug_types
? "type" : "comp",
7440 sect_offset_str (this_cu
->sect_off
));
7442 if (use_existing_cu
)
7445 /* If we're reading a TU directly from a DWO file, including a virtual DWO
7446 file (instead of going through the stub), short-circuit all of this. */
7447 if (this_cu
->reading_dwo_directly
)
7449 /* Narrow down the scope of possibilities to have to understand. */
7450 gdb_assert (this_cu
->is_debug_types
);
7451 gdb_assert (abbrev_table
== NULL
);
7452 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
7453 die_reader_func
, data
);
7457 /* This is cheap if the section is already read in. */
7458 dwarf2_read_section (objfile
, section
);
7460 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7462 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
7464 std::unique_ptr
<dwarf2_cu
> new_cu
;
7465 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7468 /* If this CU is from a DWO file we need to start over, we need to
7469 refetch the attributes from the skeleton CU.
7470 This could be optimized by retrieving those attributes from when we
7471 were here the first time: the previous comp_unit_die was stored in
7472 comp_unit_obstack. But there's no data yet that we need this
7474 if (cu
->dwo_unit
!= NULL
)
7475 rereading_dwo_cu
= 1;
7479 /* If !use_existing_cu, this_cu->cu must be NULL. */
7480 gdb_assert (this_cu
->cu
== NULL
);
7481 new_cu
.reset (new dwarf2_cu (this_cu
));
7485 /* Get the header. */
7486 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7488 /* We already have the header, there's no need to read it in again. */
7489 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7493 if (this_cu
->is_debug_types
)
7495 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7496 &cu
->header
, section
,
7497 abbrev_section
, info_ptr
,
7500 /* Since per_cu is the first member of struct signatured_type,
7501 we can go from a pointer to one to a pointer to the other. */
7502 sig_type
= (struct signatured_type
*) this_cu
;
7503 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7504 gdb_assert (sig_type
->type_offset_in_tu
7505 == cu
->header
.type_cu_offset_in_tu
);
7506 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7508 /* LENGTH has not been set yet for type units if we're
7509 using .gdb_index. */
7510 this_cu
->length
= get_cu_length (&cu
->header
);
7512 /* Establish the type offset that can be used to lookup the type. */
7513 sig_type
->type_offset_in_section
=
7514 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7516 this_cu
->dwarf_version
= cu
->header
.version
;
7520 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7521 &cu
->header
, section
,
7524 rcuh_kind::COMPILE
);
7526 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7527 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
7528 this_cu
->dwarf_version
= cu
->header
.version
;
7532 /* Skip dummy compilation units. */
7533 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7534 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7537 /* If we don't have them yet, read the abbrevs for this compilation unit.
7538 And if we need to read them now, make sure they're freed when we're
7539 done (own the table through ABBREV_TABLE_HOLDER). */
7540 abbrev_table_up abbrev_table_holder
;
7541 if (abbrev_table
!= NULL
)
7542 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7546 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7547 cu
->header
.abbrev_sect_off
);
7548 abbrev_table
= abbrev_table_holder
.get ();
7551 /* Read the top level CU/TU die. */
7552 init_cu_die_reader (&reader
, cu
, section
, NULL
, abbrev_table
);
7553 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7555 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
7558 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7559 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7560 table from the DWO file and pass the ownership over to us. It will be
7561 referenced from READER, so we must make sure to free it after we're done
7564 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7565 DWO CU, that this test will fail (the attribute will not be present). */
7566 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7567 abbrev_table_up dwo_abbrev_table
;
7570 struct dwo_unit
*dwo_unit
;
7571 struct die_info
*dwo_comp_unit_die
;
7575 complaint (&symfile_complaints
,
7576 _("compilation unit with DW_AT_GNU_dwo_name"
7577 " has children (offset %s) [in module %s]"),
7578 sect_offset_str (this_cu
->sect_off
),
7579 bfd_get_filename (abfd
));
7581 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
7582 if (dwo_unit
!= NULL
)
7584 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
7585 comp_unit_die
, NULL
,
7587 &dwo_comp_unit_die
, &has_children
,
7588 &dwo_abbrev_table
) == 0)
7593 comp_unit_die
= dwo_comp_unit_die
;
7597 /* Yikes, we couldn't find the rest of the DIE, we only have
7598 the stub. A complaint has already been logged. There's
7599 not much more we can do except pass on the stub DIE to
7600 die_reader_func. We don't want to throw an error on bad
7605 /* All of the above is setup for this call. Yikes. */
7606 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7608 /* Done, clean up. */
7609 if (new_cu
!= NULL
&& keep
)
7611 /* Link this CU into read_in_chain. */
7612 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7613 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7614 /* The chain owns it now. */
7619 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
7620 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
7621 to have already done the lookup to find the DWO file).
7623 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7624 THIS_CU->is_debug_types, but nothing else.
7626 We fill in THIS_CU->length.
7628 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7629 linker) then DIE_READER_FUNC will not get called.
7631 THIS_CU->cu is always freed when done.
7632 This is done in order to not leave THIS_CU->cu in a state where we have
7633 to care whether it refers to the "main" CU or the DWO CU. */
7636 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
7637 struct dwo_file
*dwo_file
,
7638 die_reader_func_ftype
*die_reader_func
,
7641 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7642 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7643 struct dwarf2_section_info
*section
= this_cu
->section
;
7644 bfd
*abfd
= get_section_bfd_owner (section
);
7645 struct dwarf2_section_info
*abbrev_section
;
7646 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7647 struct die_reader_specs reader
;
7648 struct die_info
*comp_unit_die
;
7651 if (dwarf_die_debug
)
7652 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7653 this_cu
->is_debug_types
? "type" : "comp",
7654 sect_offset_str (this_cu
->sect_off
));
7656 gdb_assert (this_cu
->cu
== NULL
);
7658 abbrev_section
= (dwo_file
!= NULL
7659 ? &dwo_file
->sections
.abbrev
7660 : get_abbrev_section_for_cu (this_cu
));
7662 /* This is cheap if the section is already read in. */
7663 dwarf2_read_section (objfile
, section
);
7665 struct dwarf2_cu
cu (this_cu
);
7667 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7668 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7669 &cu
.header
, section
,
7670 abbrev_section
, info_ptr
,
7671 (this_cu
->is_debug_types
7673 : rcuh_kind::COMPILE
));
7675 this_cu
->length
= get_cu_length (&cu
.header
);
7677 /* Skip dummy compilation units. */
7678 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7679 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7682 abbrev_table_up abbrev_table
7683 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7684 cu
.header
.abbrev_sect_off
);
7686 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
, abbrev_table
.get ());
7687 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7689 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7692 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
7693 does not lookup the specified DWO file.
7694 This cannot be used to read DWO files.
7696 THIS_CU->cu is always freed when done.
7697 This is done in order to not leave THIS_CU->cu in a state where we have
7698 to care whether it refers to the "main" CU or the DWO CU.
7699 We can revisit this if the data shows there's a performance issue. */
7702 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
7703 die_reader_func_ftype
*die_reader_func
,
7706 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
7709 /* Type Unit Groups.
7711 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7712 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7713 so that all types coming from the same compilation (.o file) are grouped
7714 together. A future step could be to put the types in the same symtab as
7715 the CU the types ultimately came from. */
7718 hash_type_unit_group (const void *item
)
7720 const struct type_unit_group
*tu_group
7721 = (const struct type_unit_group
*) item
;
7723 return hash_stmt_list_entry (&tu_group
->hash
);
7727 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7729 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7730 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7732 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7735 /* Allocate a hash table for type unit groups. */
7738 allocate_type_unit_groups_table (struct objfile
*objfile
)
7740 return htab_create_alloc_ex (3,
7741 hash_type_unit_group
,
7744 &objfile
->objfile_obstack
,
7745 hashtab_obstack_allocate
,
7746 dummy_obstack_deallocate
);
7749 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7750 partial symtabs. We combine several TUs per psymtab to not let the size
7751 of any one psymtab grow too big. */
7752 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7753 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7755 /* Helper routine for get_type_unit_group.
7756 Create the type_unit_group object used to hold one or more TUs. */
7758 static struct type_unit_group
*
7759 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7761 struct dwarf2_per_objfile
*dwarf2_per_objfile
7762 = cu
->per_cu
->dwarf2_per_objfile
;
7763 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7764 struct dwarf2_per_cu_data
*per_cu
;
7765 struct type_unit_group
*tu_group
;
7767 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7768 struct type_unit_group
);
7769 per_cu
= &tu_group
->per_cu
;
7770 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7772 if (dwarf2_per_objfile
->using_index
)
7774 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7775 struct dwarf2_per_cu_quick_data
);
7779 unsigned int line_offset
= to_underlying (line_offset_struct
);
7780 struct partial_symtab
*pst
;
7783 /* Give the symtab a useful name for debug purposes. */
7784 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7785 name
= xstrprintf ("<type_units_%d>",
7786 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7788 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
7790 pst
= create_partial_symtab (per_cu
, name
);
7796 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7797 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7802 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7803 STMT_LIST is a DW_AT_stmt_list attribute. */
7805 static struct type_unit_group
*
7806 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7808 struct dwarf2_per_objfile
*dwarf2_per_objfile
7809 = cu
->per_cu
->dwarf2_per_objfile
;
7810 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7811 struct type_unit_group
*tu_group
;
7813 unsigned int line_offset
;
7814 struct type_unit_group type_unit_group_for_lookup
;
7816 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7818 dwarf2_per_objfile
->type_unit_groups
=
7819 allocate_type_unit_groups_table (dwarf2_per_objfile
->objfile
);
7822 /* Do we need to create a new group, or can we use an existing one? */
7826 line_offset
= DW_UNSND (stmt_list
);
7827 ++tu_stats
->nr_symtab_sharers
;
7831 /* Ugh, no stmt_list. Rare, but we have to handle it.
7832 We can do various things here like create one group per TU or
7833 spread them over multiple groups to split up the expansion work.
7834 To avoid worst case scenarios (too many groups or too large groups)
7835 we, umm, group them in bunches. */
7836 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7837 | (tu_stats
->nr_stmt_less_type_units
7838 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7839 ++tu_stats
->nr_stmt_less_type_units
;
7842 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7843 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7844 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
7845 &type_unit_group_for_lookup
, INSERT
);
7848 tu_group
= (struct type_unit_group
*) *slot
;
7849 gdb_assert (tu_group
!= NULL
);
7853 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7854 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7856 ++tu_stats
->nr_symtabs
;
7862 /* Partial symbol tables. */
7864 /* Create a psymtab named NAME and assign it to PER_CU.
7866 The caller must fill in the following details:
7867 dirname, textlow, texthigh. */
7869 static struct partial_symtab
*
7870 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7872 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7873 struct partial_symtab
*pst
;
7875 pst
= start_psymtab_common (objfile
, name
, 0,
7876 objfile
->global_psymbols
,
7877 objfile
->static_psymbols
);
7879 pst
->psymtabs_addrmap_supported
= 1;
7881 /* This is the glue that links PST into GDB's symbol API. */
7882 pst
->read_symtab_private
= per_cu
;
7883 pst
->read_symtab
= dwarf2_read_symtab
;
7884 per_cu
->v
.psymtab
= pst
;
7889 /* The DATA object passed to process_psymtab_comp_unit_reader has this
7892 struct process_psymtab_comp_unit_data
7894 /* True if we are reading a DW_TAG_partial_unit. */
7896 int want_partial_unit
;
7898 /* The "pretend" language that is used if the CU doesn't declare a
7901 enum language pretend_language
;
7904 /* die_reader_func for process_psymtab_comp_unit. */
7907 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7908 const gdb_byte
*info_ptr
,
7909 struct die_info
*comp_unit_die
,
7913 struct dwarf2_cu
*cu
= reader
->cu
;
7914 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7915 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7916 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7918 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7919 struct partial_symtab
*pst
;
7920 enum pc_bounds_kind cu_bounds_kind
;
7921 const char *filename
;
7922 struct process_psymtab_comp_unit_data
*info
7923 = (struct process_psymtab_comp_unit_data
*) data
;
7925 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
7928 gdb_assert (! per_cu
->is_debug_types
);
7930 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
7932 cu
->list_in_scope
= &file_symbols
;
7934 /* Allocate a new partial symbol table structure. */
7935 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7936 if (filename
== NULL
)
7939 pst
= create_partial_symtab (per_cu
, filename
);
7941 /* This must be done before calling dwarf2_build_include_psymtabs. */
7942 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7944 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7946 dwarf2_find_base_address (comp_unit_die
, cu
);
7948 /* Possibly set the default values of LOWPC and HIGHPC from
7950 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7951 &best_highpc
, cu
, pst
);
7952 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7953 /* Store the contiguous range if it is not empty; it can be empty for
7954 CUs with no code. */
7955 addrmap_set_empty (objfile
->psymtabs_addrmap
,
7956 gdbarch_adjust_dwarf2_addr (gdbarch
,
7957 best_lowpc
+ baseaddr
),
7958 gdbarch_adjust_dwarf2_addr (gdbarch
,
7959 best_highpc
+ baseaddr
) - 1,
7962 /* Check if comp unit has_children.
7963 If so, read the rest of the partial symbols from this comp unit.
7964 If not, there's no more debug_info for this comp unit. */
7967 struct partial_die_info
*first_die
;
7968 CORE_ADDR lowpc
, highpc
;
7970 lowpc
= ((CORE_ADDR
) -1);
7971 highpc
= ((CORE_ADDR
) 0);
7973 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7975 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7976 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7978 /* If we didn't find a lowpc, set it to highpc to avoid
7979 complaints from `maint check'. */
7980 if (lowpc
== ((CORE_ADDR
) -1))
7983 /* If the compilation unit didn't have an explicit address range,
7984 then use the information extracted from its child dies. */
7985 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7988 best_highpc
= highpc
;
7991 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
7992 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
7994 end_psymtab_common (objfile
, pst
);
7996 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
7999 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
8000 struct dwarf2_per_cu_data
*iter
;
8002 /* Fill in 'dependencies' here; we fill in 'users' in a
8004 pst
->number_of_dependencies
= len
;
8006 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
8008 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8011 pst
->dependencies
[i
] = iter
->v
.psymtab
;
8013 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
8016 /* Get the list of files included in the current compilation unit,
8017 and build a psymtab for each of them. */
8018 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
8020 if (dwarf_read_debug
)
8022 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8024 fprintf_unfiltered (gdb_stdlog
,
8025 "Psymtab for %s unit @%s: %s - %s"
8026 ", %d global, %d static syms\n",
8027 per_cu
->is_debug_types
? "type" : "comp",
8028 sect_offset_str (per_cu
->sect_off
),
8029 paddress (gdbarch
, pst
->textlow
),
8030 paddress (gdbarch
, pst
->texthigh
),
8031 pst
->n_global_syms
, pst
->n_static_syms
);
8035 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8036 Process compilation unit THIS_CU for a psymtab. */
8039 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8040 int want_partial_unit
,
8041 enum language pretend_language
)
8043 /* If this compilation unit was already read in, free the
8044 cached copy in order to read it in again. This is
8045 necessary because we skipped some symbols when we first
8046 read in the compilation unit (see load_partial_dies).
8047 This problem could be avoided, but the benefit is unclear. */
8048 if (this_cu
->cu
!= NULL
)
8049 free_one_cached_comp_unit (this_cu
);
8051 if (this_cu
->is_debug_types
)
8052 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, false,
8053 build_type_psymtabs_reader
, NULL
);
8056 process_psymtab_comp_unit_data info
;
8057 info
.want_partial_unit
= want_partial_unit
;
8058 info
.pretend_language
= pretend_language
;
8059 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, false,
8060 process_psymtab_comp_unit_reader
, &info
);
8063 /* Age out any secondary CUs. */
8064 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
8067 /* Reader function for build_type_psymtabs. */
8070 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
8071 const gdb_byte
*info_ptr
,
8072 struct die_info
*type_unit_die
,
8076 struct dwarf2_per_objfile
*dwarf2_per_objfile
8077 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
8078 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8079 struct dwarf2_cu
*cu
= reader
->cu
;
8080 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8081 struct signatured_type
*sig_type
;
8082 struct type_unit_group
*tu_group
;
8083 struct attribute
*attr
;
8084 struct partial_die_info
*first_die
;
8085 CORE_ADDR lowpc
, highpc
;
8086 struct partial_symtab
*pst
;
8088 gdb_assert (data
== NULL
);
8089 gdb_assert (per_cu
->is_debug_types
);
8090 sig_type
= (struct signatured_type
*) per_cu
;
8095 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
8096 tu_group
= get_type_unit_group (cu
, attr
);
8098 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
8100 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
8101 cu
->list_in_scope
= &file_symbols
;
8102 pst
= create_partial_symtab (per_cu
, "");
8105 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8107 lowpc
= (CORE_ADDR
) -1;
8108 highpc
= (CORE_ADDR
) 0;
8109 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
8111 end_psymtab_common (objfile
, pst
);
8114 /* Struct used to sort TUs by their abbreviation table offset. */
8116 struct tu_abbrev_offset
8118 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
8119 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
8122 signatured_type
*sig_type
;
8123 sect_offset abbrev_offset
;
8126 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
8129 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
8130 const struct tu_abbrev_offset
&b
)
8132 return a
.abbrev_offset
< b
.abbrev_offset
;
8135 /* Efficiently read all the type units.
8136 This does the bulk of the work for build_type_psymtabs.
8138 The efficiency is because we sort TUs by the abbrev table they use and
8139 only read each abbrev table once. In one program there are 200K TUs
8140 sharing 8K abbrev tables.
8142 The main purpose of this function is to support building the
8143 dwarf2_per_objfile->type_unit_groups table.
8144 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
8145 can collapse the search space by grouping them by stmt_list.
8146 The savings can be significant, in the same program from above the 200K TUs
8147 share 8K stmt_list tables.
8149 FUNC is expected to call get_type_unit_group, which will create the
8150 struct type_unit_group if necessary and add it to
8151 dwarf2_per_objfile->type_unit_groups. */
8154 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8156 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8157 abbrev_table_up abbrev_table
;
8158 sect_offset abbrev_offset
;
8160 /* It's up to the caller to not call us multiple times. */
8161 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
8163 if (dwarf2_per_objfile
->all_type_units
.empty ())
8166 /* TUs typically share abbrev tables, and there can be way more TUs than
8167 abbrev tables. Sort by abbrev table to reduce the number of times we
8168 read each abbrev table in.
8169 Alternatives are to punt or to maintain a cache of abbrev tables.
8170 This is simpler and efficient enough for now.
8172 Later we group TUs by their DW_AT_stmt_list value (as this defines the
8173 symtab to use). Typically TUs with the same abbrev offset have the same
8174 stmt_list value too so in practice this should work well.
8176 The basic algorithm here is:
8178 sort TUs by abbrev table
8179 for each TU with same abbrev table:
8180 read abbrev table if first user
8181 read TU top level DIE
8182 [IWBN if DWO skeletons had DW_AT_stmt_list]
8185 if (dwarf_read_debug
)
8186 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
8188 /* Sort in a separate table to maintain the order of all_type_units
8189 for .gdb_index: TU indices directly index all_type_units. */
8190 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
8191 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->all_type_units
.size ());
8193 for (signatured_type
*sig_type
: dwarf2_per_objfile
->all_type_units
)
8194 sorted_by_abbrev
.emplace_back
8195 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
8196 sig_type
->per_cu
.section
,
8197 sig_type
->per_cu
.sect_off
));
8199 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
8200 sort_tu_by_abbrev_offset
);
8202 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
8204 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
8206 /* Switch to the next abbrev table if necessary. */
8207 if (abbrev_table
== NULL
8208 || tu
.abbrev_offset
!= abbrev_offset
)
8210 abbrev_offset
= tu
.abbrev_offset
;
8212 abbrev_table_read_table (dwarf2_per_objfile
,
8213 &dwarf2_per_objfile
->abbrev
,
8215 ++tu_stats
->nr_uniq_abbrev_tables
;
8218 init_cutu_and_read_dies (&tu
.sig_type
->per_cu
, abbrev_table
.get (),
8219 0, 0, false, build_type_psymtabs_reader
, NULL
);
8223 /* Print collected type unit statistics. */
8226 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8228 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8230 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
8231 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
8232 dwarf2_per_objfile
->all_type_units
.size ());
8233 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
8234 tu_stats
->nr_uniq_abbrev_tables
);
8235 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
8236 tu_stats
->nr_symtabs
);
8237 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
8238 tu_stats
->nr_symtab_sharers
);
8239 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
8240 tu_stats
->nr_stmt_less_type_units
);
8241 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
8242 tu_stats
->nr_all_type_units_reallocs
);
8245 /* Traversal function for build_type_psymtabs. */
8248 build_type_psymtab_dependencies (void **slot
, void *info
)
8250 struct dwarf2_per_objfile
*dwarf2_per_objfile
8251 = (struct dwarf2_per_objfile
*) info
;
8252 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8253 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
8254 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
8255 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8256 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
8257 struct signatured_type
*iter
;
8260 gdb_assert (len
> 0);
8261 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
8263 pst
->number_of_dependencies
= len
;
8265 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
8267 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
8270 gdb_assert (iter
->per_cu
.is_debug_types
);
8271 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
8272 iter
->type_unit_group
= tu_group
;
8275 VEC_free (sig_type_ptr
, tu_group
->tus
);
8280 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8281 Build partial symbol tables for the .debug_types comp-units. */
8284 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8286 if (! create_all_type_units (dwarf2_per_objfile
))
8289 build_type_psymtabs_1 (dwarf2_per_objfile
);
8292 /* Traversal function for process_skeletonless_type_unit.
8293 Read a TU in a DWO file and build partial symbols for it. */
8296 process_skeletonless_type_unit (void **slot
, void *info
)
8298 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
8299 struct dwarf2_per_objfile
*dwarf2_per_objfile
8300 = (struct dwarf2_per_objfile
*) info
;
8301 struct signatured_type find_entry
, *entry
;
8303 /* If this TU doesn't exist in the global table, add it and read it in. */
8305 if (dwarf2_per_objfile
->signatured_types
== NULL
)
8307 dwarf2_per_objfile
->signatured_types
8308 = allocate_signatured_type_table (dwarf2_per_objfile
->objfile
);
8311 find_entry
.signature
= dwo_unit
->signature
;
8312 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
8314 /* If we've already seen this type there's nothing to do. What's happening
8315 is we're doing our own version of comdat-folding here. */
8319 /* This does the job that create_all_type_units would have done for
8321 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
8322 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
8325 /* This does the job that build_type_psymtabs_1 would have done. */
8326 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0, false,
8327 build_type_psymtabs_reader
, NULL
);
8332 /* Traversal function for process_skeletonless_type_units. */
8335 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
8337 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
8339 if (dwo_file
->tus
!= NULL
)
8341 htab_traverse_noresize (dwo_file
->tus
,
8342 process_skeletonless_type_unit
, info
);
8348 /* Scan all TUs of DWO files, verifying we've processed them.
8349 This is needed in case a TU was emitted without its skeleton.
8350 Note: This can't be done until we know what all the DWO files are. */
8353 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8355 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
8356 if (get_dwp_file (dwarf2_per_objfile
) == NULL
8357 && dwarf2_per_objfile
->dwo_files
!= NULL
)
8359 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
8360 process_dwo_file_for_skeletonless_type_units
,
8361 dwarf2_per_objfile
);
8365 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
8368 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8370 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8372 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8377 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
8379 /* Set the 'user' field only if it is not already set. */
8380 if (pst
->dependencies
[j
]->user
== NULL
)
8381 pst
->dependencies
[j
]->user
= pst
;
8386 /* Build the partial symbol table by doing a quick pass through the
8387 .debug_info and .debug_abbrev sections. */
8390 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8392 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8394 if (dwarf_read_debug
)
8396 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
8397 objfile_name (objfile
));
8400 dwarf2_per_objfile
->reading_partial_symbols
= 1;
8402 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
8404 /* Any cached compilation units will be linked by the per-objfile
8405 read_in_chain. Make sure to free them when we're done. */
8406 free_cached_comp_units
freer (dwarf2_per_objfile
);
8408 build_type_psymtabs (dwarf2_per_objfile
);
8410 create_all_comp_units (dwarf2_per_objfile
);
8412 /* Create a temporary address map on a temporary obstack. We later
8413 copy this to the final obstack. */
8414 auto_obstack temp_obstack
;
8416 scoped_restore save_psymtabs_addrmap
8417 = make_scoped_restore (&objfile
->psymtabs_addrmap
,
8418 addrmap_create_mutable (&temp_obstack
));
8420 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8421 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
8423 /* This has to wait until we read the CUs, we need the list of DWOs. */
8424 process_skeletonless_type_units (dwarf2_per_objfile
);
8426 /* Now that all TUs have been processed we can fill in the dependencies. */
8427 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
8429 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
8430 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
8433 if (dwarf_read_debug
)
8434 print_tu_stats (dwarf2_per_objfile
);
8436 set_partial_user (dwarf2_per_objfile
);
8438 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
8439 &objfile
->objfile_obstack
);
8440 /* At this point we want to keep the address map. */
8441 save_psymtabs_addrmap
.release ();
8443 if (dwarf_read_debug
)
8444 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
8445 objfile_name (objfile
));
8448 /* die_reader_func for load_partial_comp_unit. */
8451 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
8452 const gdb_byte
*info_ptr
,
8453 struct die_info
*comp_unit_die
,
8457 struct dwarf2_cu
*cu
= reader
->cu
;
8459 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
8461 /* Check if comp unit has_children.
8462 If so, read the rest of the partial symbols from this comp unit.
8463 If not, there's no more debug_info for this comp unit. */
8465 load_partial_dies (reader
, info_ptr
, 0);
8468 /* Load the partial DIEs for a secondary CU into memory.
8469 This is also used when rereading a primary CU with load_all_dies. */
8472 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
8474 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1, false,
8475 load_partial_comp_unit_reader
, NULL
);
8479 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
8480 struct dwarf2_section_info
*section
,
8481 struct dwarf2_section_info
*abbrev_section
,
8482 unsigned int is_dwz
)
8484 const gdb_byte
*info_ptr
;
8485 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8487 if (dwarf_read_debug
)
8488 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
8489 get_section_name (section
),
8490 get_section_file_name (section
));
8492 dwarf2_read_section (objfile
, section
);
8494 info_ptr
= section
->buffer
;
8496 while (info_ptr
< section
->buffer
+ section
->size
)
8498 struct dwarf2_per_cu_data
*this_cu
;
8500 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
8502 comp_unit_head cu_header
;
8503 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
8504 abbrev_section
, info_ptr
,
8505 rcuh_kind::COMPILE
);
8507 /* Save the compilation unit for later lookup. */
8508 if (cu_header
.unit_type
!= DW_UT_type
)
8510 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
8511 struct dwarf2_per_cu_data
);
8512 memset (this_cu
, 0, sizeof (*this_cu
));
8516 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
8517 struct signatured_type
);
8518 memset (sig_type
, 0, sizeof (*sig_type
));
8519 sig_type
->signature
= cu_header
.signature
;
8520 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
8521 this_cu
= &sig_type
->per_cu
;
8523 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
8524 this_cu
->sect_off
= sect_off
;
8525 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
8526 this_cu
->is_dwz
= is_dwz
;
8527 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
8528 this_cu
->section
= section
;
8530 dwarf2_per_objfile
->all_comp_units
.push_back (this_cu
);
8532 info_ptr
= info_ptr
+ this_cu
->length
;
8536 /* Create a list of all compilation units in OBJFILE.
8537 This is only done for -readnow and building partial symtabs. */
8540 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8542 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
8543 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
8544 &dwarf2_per_objfile
->abbrev
, 0);
8546 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
8548 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
8552 /* Process all loaded DIEs for compilation unit CU, starting at
8553 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8554 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8555 DW_AT_ranges). See the comments of add_partial_subprogram on how
8556 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8559 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8560 CORE_ADDR
*highpc
, int set_addrmap
,
8561 struct dwarf2_cu
*cu
)
8563 struct partial_die_info
*pdi
;
8565 /* Now, march along the PDI's, descending into ones which have
8566 interesting children but skipping the children of the other ones,
8567 until we reach the end of the compilation unit. */
8575 /* Anonymous namespaces or modules have no name but have interesting
8576 children, so we need to look at them. Ditto for anonymous
8579 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8580 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8581 || pdi
->tag
== DW_TAG_imported_unit
8582 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8586 case DW_TAG_subprogram
:
8587 case DW_TAG_inlined_subroutine
:
8588 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8590 case DW_TAG_constant
:
8591 case DW_TAG_variable
:
8592 case DW_TAG_typedef
:
8593 case DW_TAG_union_type
:
8594 if (!pdi
->is_declaration
)
8596 add_partial_symbol (pdi
, cu
);
8599 case DW_TAG_class_type
:
8600 case DW_TAG_interface_type
:
8601 case DW_TAG_structure_type
:
8602 if (!pdi
->is_declaration
)
8604 add_partial_symbol (pdi
, cu
);
8606 if ((cu
->language
== language_rust
8607 || cu
->language
== language_cplus
) && pdi
->has_children
)
8608 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8611 case DW_TAG_enumeration_type
:
8612 if (!pdi
->is_declaration
)
8613 add_partial_enumeration (pdi
, cu
);
8615 case DW_TAG_base_type
:
8616 case DW_TAG_subrange_type
:
8617 /* File scope base type definitions are added to the partial
8619 add_partial_symbol (pdi
, cu
);
8621 case DW_TAG_namespace
:
8622 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8625 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8627 case DW_TAG_imported_unit
:
8629 struct dwarf2_per_cu_data
*per_cu
;
8631 /* For now we don't handle imported units in type units. */
8632 if (cu
->per_cu
->is_debug_types
)
8634 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8635 " supported in type units [in module %s]"),
8636 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8639 per_cu
= dwarf2_find_containing_comp_unit
8640 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8641 cu
->per_cu
->dwarf2_per_objfile
);
8643 /* Go read the partial unit, if needed. */
8644 if (per_cu
->v
.psymtab
== NULL
)
8645 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
8647 VEC_safe_push (dwarf2_per_cu_ptr
,
8648 cu
->per_cu
->imported_symtabs
, per_cu
);
8651 case DW_TAG_imported_declaration
:
8652 add_partial_symbol (pdi
, cu
);
8659 /* If the die has a sibling, skip to the sibling. */
8661 pdi
= pdi
->die_sibling
;
8665 /* Functions used to compute the fully scoped name of a partial DIE.
8667 Normally, this is simple. For C++, the parent DIE's fully scoped
8668 name is concatenated with "::" and the partial DIE's name.
8669 Enumerators are an exception; they use the scope of their parent
8670 enumeration type, i.e. the name of the enumeration type is not
8671 prepended to the enumerator.
8673 There are two complexities. One is DW_AT_specification; in this
8674 case "parent" means the parent of the target of the specification,
8675 instead of the direct parent of the DIE. The other is compilers
8676 which do not emit DW_TAG_namespace; in this case we try to guess
8677 the fully qualified name of structure types from their members'
8678 linkage names. This must be done using the DIE's children rather
8679 than the children of any DW_AT_specification target. We only need
8680 to do this for structures at the top level, i.e. if the target of
8681 any DW_AT_specification (if any; otherwise the DIE itself) does not
8684 /* Compute the scope prefix associated with PDI's parent, in
8685 compilation unit CU. The result will be allocated on CU's
8686 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8687 field. NULL is returned if no prefix is necessary. */
8689 partial_die_parent_scope (struct partial_die_info
*pdi
,
8690 struct dwarf2_cu
*cu
)
8692 const char *grandparent_scope
;
8693 struct partial_die_info
*parent
, *real_pdi
;
8695 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8696 then this means the parent of the specification DIE. */
8699 while (real_pdi
->has_specification
)
8700 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
8701 real_pdi
->spec_is_dwz
, cu
);
8703 parent
= real_pdi
->die_parent
;
8707 if (parent
->scope_set
)
8708 return parent
->scope
;
8712 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8714 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8715 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8716 Work around this problem here. */
8717 if (cu
->language
== language_cplus
8718 && parent
->tag
== DW_TAG_namespace
8719 && strcmp (parent
->name
, "::") == 0
8720 && grandparent_scope
== NULL
)
8722 parent
->scope
= NULL
;
8723 parent
->scope_set
= 1;
8727 if (pdi
->tag
== DW_TAG_enumerator
)
8728 /* Enumerators should not get the name of the enumeration as a prefix. */
8729 parent
->scope
= grandparent_scope
;
8730 else if (parent
->tag
== DW_TAG_namespace
8731 || parent
->tag
== DW_TAG_module
8732 || parent
->tag
== DW_TAG_structure_type
8733 || parent
->tag
== DW_TAG_class_type
8734 || parent
->tag
== DW_TAG_interface_type
8735 || parent
->tag
== DW_TAG_union_type
8736 || parent
->tag
== DW_TAG_enumeration_type
)
8738 if (grandparent_scope
== NULL
)
8739 parent
->scope
= parent
->name
;
8741 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8743 parent
->name
, 0, cu
);
8747 /* FIXME drow/2004-04-01: What should we be doing with
8748 function-local names? For partial symbols, we should probably be
8750 complaint (&symfile_complaints
,
8751 _("unhandled containing DIE tag %d for DIE at %s"),
8752 parent
->tag
, sect_offset_str (pdi
->sect_off
));
8753 parent
->scope
= grandparent_scope
;
8756 parent
->scope_set
= 1;
8757 return parent
->scope
;
8760 /* Return the fully scoped name associated with PDI, from compilation unit
8761 CU. The result will be allocated with malloc. */
8764 partial_die_full_name (struct partial_die_info
*pdi
,
8765 struct dwarf2_cu
*cu
)
8767 const char *parent_scope
;
8769 /* If this is a template instantiation, we can not work out the
8770 template arguments from partial DIEs. So, unfortunately, we have
8771 to go through the full DIEs. At least any work we do building
8772 types here will be reused if full symbols are loaded later. */
8773 if (pdi
->has_template_arguments
)
8777 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8779 struct die_info
*die
;
8780 struct attribute attr
;
8781 struct dwarf2_cu
*ref_cu
= cu
;
8783 /* DW_FORM_ref_addr is using section offset. */
8784 attr
.name
= (enum dwarf_attribute
) 0;
8785 attr
.form
= DW_FORM_ref_addr
;
8786 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8787 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8789 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8793 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8794 if (parent_scope
== NULL
)
8797 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
8801 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8803 struct dwarf2_per_objfile
*dwarf2_per_objfile
8804 = cu
->per_cu
->dwarf2_per_objfile
;
8805 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8806 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8808 const char *actual_name
= NULL
;
8810 char *built_actual_name
;
8812 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8814 built_actual_name
= partial_die_full_name (pdi
, cu
);
8815 if (built_actual_name
!= NULL
)
8816 actual_name
= built_actual_name
;
8818 if (actual_name
== NULL
)
8819 actual_name
= pdi
->name
;
8823 case DW_TAG_inlined_subroutine
:
8824 case DW_TAG_subprogram
:
8825 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
8826 if (pdi
->is_external
|| cu
->language
== language_ada
)
8828 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
8829 of the global scope. But in Ada, we want to be able to access
8830 nested procedures globally. So all Ada subprograms are stored
8831 in the global scope. */
8832 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8833 built_actual_name
!= NULL
,
8834 VAR_DOMAIN
, LOC_BLOCK
,
8835 &objfile
->global_psymbols
,
8836 addr
, cu
->language
, objfile
);
8840 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8841 built_actual_name
!= NULL
,
8842 VAR_DOMAIN
, LOC_BLOCK
,
8843 &objfile
->static_psymbols
,
8844 addr
, cu
->language
, objfile
);
8847 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8848 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8850 case DW_TAG_constant
:
8852 std::vector
<partial_symbol
*> *list
;
8854 if (pdi
->is_external
)
8855 list
= &objfile
->global_psymbols
;
8857 list
= &objfile
->static_psymbols
;
8858 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8859 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
8860 list
, 0, cu
->language
, objfile
);
8863 case DW_TAG_variable
:
8865 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8869 && !dwarf2_per_objfile
->has_section_at_zero
)
8871 /* A global or static variable may also have been stripped
8872 out by the linker if unused, in which case its address
8873 will be nullified; do not add such variables into partial
8874 symbol table then. */
8876 else if (pdi
->is_external
)
8879 Don't enter into the minimal symbol tables as there is
8880 a minimal symbol table entry from the ELF symbols already.
8881 Enter into partial symbol table if it has a location
8882 descriptor or a type.
8883 If the location descriptor is missing, new_symbol will create
8884 a LOC_UNRESOLVED symbol, the address of the variable will then
8885 be determined from the minimal symbol table whenever the variable
8887 The address for the partial symbol table entry is not
8888 used by GDB, but it comes in handy for debugging partial symbol
8891 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8892 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8893 built_actual_name
!= NULL
,
8894 VAR_DOMAIN
, LOC_STATIC
,
8895 &objfile
->global_psymbols
,
8897 cu
->language
, objfile
);
8901 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8903 /* Static Variable. Skip symbols whose value we cannot know (those
8904 without location descriptors or constant values). */
8905 if (!has_loc
&& !pdi
->has_const_value
)
8907 xfree (built_actual_name
);
8911 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8912 built_actual_name
!= NULL
,
8913 VAR_DOMAIN
, LOC_STATIC
,
8914 &objfile
->static_psymbols
,
8915 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
8916 cu
->language
, objfile
);
8919 case DW_TAG_typedef
:
8920 case DW_TAG_base_type
:
8921 case DW_TAG_subrange_type
:
8922 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8923 built_actual_name
!= NULL
,
8924 VAR_DOMAIN
, LOC_TYPEDEF
,
8925 &objfile
->static_psymbols
,
8926 0, cu
->language
, objfile
);
8928 case DW_TAG_imported_declaration
:
8929 case DW_TAG_namespace
:
8930 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8931 built_actual_name
!= NULL
,
8932 VAR_DOMAIN
, LOC_TYPEDEF
,
8933 &objfile
->global_psymbols
,
8934 0, cu
->language
, objfile
);
8937 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8938 built_actual_name
!= NULL
,
8939 MODULE_DOMAIN
, LOC_TYPEDEF
,
8940 &objfile
->global_psymbols
,
8941 0, cu
->language
, objfile
);
8943 case DW_TAG_class_type
:
8944 case DW_TAG_interface_type
:
8945 case DW_TAG_structure_type
:
8946 case DW_TAG_union_type
:
8947 case DW_TAG_enumeration_type
:
8948 /* Skip external references. The DWARF standard says in the section
8949 about "Structure, Union, and Class Type Entries": "An incomplete
8950 structure, union or class type is represented by a structure,
8951 union or class entry that does not have a byte size attribute
8952 and that has a DW_AT_declaration attribute." */
8953 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8955 xfree (built_actual_name
);
8959 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8960 static vs. global. */
8961 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8962 built_actual_name
!= NULL
,
8963 STRUCT_DOMAIN
, LOC_TYPEDEF
,
8964 cu
->language
== language_cplus
8965 ? &objfile
->global_psymbols
8966 : &objfile
->static_psymbols
,
8967 0, cu
->language
, objfile
);
8970 case DW_TAG_enumerator
:
8971 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8972 built_actual_name
!= NULL
,
8973 VAR_DOMAIN
, LOC_CONST
,
8974 cu
->language
== language_cplus
8975 ? &objfile
->global_psymbols
8976 : &objfile
->static_psymbols
,
8977 0, cu
->language
, objfile
);
8983 xfree (built_actual_name
);
8986 /* Read a partial die corresponding to a namespace; also, add a symbol
8987 corresponding to that namespace to the symbol table. NAMESPACE is
8988 the name of the enclosing namespace. */
8991 add_partial_namespace (struct partial_die_info
*pdi
,
8992 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8993 int set_addrmap
, struct dwarf2_cu
*cu
)
8995 /* Add a symbol for the namespace. */
8997 add_partial_symbol (pdi
, cu
);
8999 /* Now scan partial symbols in that namespace. */
9001 if (pdi
->has_children
)
9002 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9005 /* Read a partial die corresponding to a Fortran module. */
9008 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
9009 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
9011 /* Add a symbol for the namespace. */
9013 add_partial_symbol (pdi
, cu
);
9015 /* Now scan partial symbols in that module. */
9017 if (pdi
->has_children
)
9018 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9021 /* Read a partial die corresponding to a subprogram or an inlined
9022 subprogram and create a partial symbol for that subprogram.
9023 When the CU language allows it, this routine also defines a partial
9024 symbol for each nested subprogram that this subprogram contains.
9025 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
9026 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
9028 PDI may also be a lexical block, in which case we simply search
9029 recursively for subprograms defined inside that lexical block.
9030 Again, this is only performed when the CU language allows this
9031 type of definitions. */
9034 add_partial_subprogram (struct partial_die_info
*pdi
,
9035 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9036 int set_addrmap
, struct dwarf2_cu
*cu
)
9038 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
9040 if (pdi
->has_pc_info
)
9042 if (pdi
->lowpc
< *lowpc
)
9043 *lowpc
= pdi
->lowpc
;
9044 if (pdi
->highpc
> *highpc
)
9045 *highpc
= pdi
->highpc
;
9048 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9049 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9054 baseaddr
= ANOFFSET (objfile
->section_offsets
,
9055 SECT_OFF_TEXT (objfile
));
9056 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
9057 pdi
->lowpc
+ baseaddr
);
9058 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
9059 pdi
->highpc
+ baseaddr
);
9060 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
9061 cu
->per_cu
->v
.psymtab
);
9065 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
9067 if (!pdi
->is_declaration
)
9068 /* Ignore subprogram DIEs that do not have a name, they are
9069 illegal. Do not emit a complaint at this point, we will
9070 do so when we convert this psymtab into a symtab. */
9072 add_partial_symbol (pdi
, cu
);
9076 if (! pdi
->has_children
)
9079 if (cu
->language
== language_ada
)
9081 pdi
= pdi
->die_child
;
9085 if (pdi
->tag
== DW_TAG_subprogram
9086 || pdi
->tag
== DW_TAG_inlined_subroutine
9087 || pdi
->tag
== DW_TAG_lexical_block
)
9088 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
9089 pdi
= pdi
->die_sibling
;
9094 /* Read a partial die corresponding to an enumeration type. */
9097 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
9098 struct dwarf2_cu
*cu
)
9100 struct partial_die_info
*pdi
;
9102 if (enum_pdi
->name
!= NULL
)
9103 add_partial_symbol (enum_pdi
, cu
);
9105 pdi
= enum_pdi
->die_child
;
9108 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
9109 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
9111 add_partial_symbol (pdi
, cu
);
9112 pdi
= pdi
->die_sibling
;
9116 /* Return the initial uleb128 in the die at INFO_PTR. */
9119 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
9121 unsigned int bytes_read
;
9123 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9126 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
9127 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
9129 Return the corresponding abbrev, or NULL if the number is zero (indicating
9130 an empty DIE). In either case *BYTES_READ will be set to the length of
9131 the initial number. */
9133 static struct abbrev_info
*
9134 peek_die_abbrev (const die_reader_specs
&reader
,
9135 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
9137 dwarf2_cu
*cu
= reader
.cu
;
9138 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
9139 unsigned int abbrev_number
9140 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
9142 if (abbrev_number
== 0)
9145 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
9148 error (_("Dwarf Error: Could not find abbrev number %d in %s"
9149 " at offset %s [in module %s]"),
9150 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
9151 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
9157 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9158 Returns a pointer to the end of a series of DIEs, terminated by an empty
9159 DIE. Any children of the skipped DIEs will also be skipped. */
9161 static const gdb_byte
*
9162 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
9166 unsigned int bytes_read
;
9167 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
9170 return info_ptr
+ bytes_read
;
9172 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
9176 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9177 INFO_PTR should point just after the initial uleb128 of a DIE, and the
9178 abbrev corresponding to that skipped uleb128 should be passed in
9179 ABBREV. Returns a pointer to this DIE's sibling, skipping any
9182 static const gdb_byte
*
9183 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
9184 struct abbrev_info
*abbrev
)
9186 unsigned int bytes_read
;
9187 struct attribute attr
;
9188 bfd
*abfd
= reader
->abfd
;
9189 struct dwarf2_cu
*cu
= reader
->cu
;
9190 const gdb_byte
*buffer
= reader
->buffer
;
9191 const gdb_byte
*buffer_end
= reader
->buffer_end
;
9192 unsigned int form
, i
;
9194 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
9196 /* The only abbrev we care about is DW_AT_sibling. */
9197 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
9199 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
9200 if (attr
.form
== DW_FORM_ref_addr
)
9201 complaint (&symfile_complaints
,
9202 _("ignoring absolute DW_AT_sibling"));
9205 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
9206 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
9208 if (sibling_ptr
< info_ptr
)
9209 complaint (&symfile_complaints
,
9210 _("DW_AT_sibling points backwards"));
9211 else if (sibling_ptr
> reader
->buffer_end
)
9212 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
9218 /* If it isn't DW_AT_sibling, skip this attribute. */
9219 form
= abbrev
->attrs
[i
].form
;
9223 case DW_FORM_ref_addr
:
9224 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
9225 and later it is offset sized. */
9226 if (cu
->header
.version
== 2)
9227 info_ptr
+= cu
->header
.addr_size
;
9229 info_ptr
+= cu
->header
.offset_size
;
9231 case DW_FORM_GNU_ref_alt
:
9232 info_ptr
+= cu
->header
.offset_size
;
9235 info_ptr
+= cu
->header
.addr_size
;
9242 case DW_FORM_flag_present
:
9243 case DW_FORM_implicit_const
:
9255 case DW_FORM_ref_sig8
:
9258 case DW_FORM_data16
:
9261 case DW_FORM_string
:
9262 read_direct_string (abfd
, info_ptr
, &bytes_read
);
9263 info_ptr
+= bytes_read
;
9265 case DW_FORM_sec_offset
:
9267 case DW_FORM_GNU_strp_alt
:
9268 info_ptr
+= cu
->header
.offset_size
;
9270 case DW_FORM_exprloc
:
9272 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9273 info_ptr
+= bytes_read
;
9275 case DW_FORM_block1
:
9276 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
9278 case DW_FORM_block2
:
9279 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
9281 case DW_FORM_block4
:
9282 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
9286 case DW_FORM_ref_udata
:
9287 case DW_FORM_GNU_addr_index
:
9288 case DW_FORM_GNU_str_index
:
9289 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
9291 case DW_FORM_indirect
:
9292 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9293 info_ptr
+= bytes_read
;
9294 /* We need to continue parsing from here, so just go back to
9296 goto skip_attribute
;
9299 error (_("Dwarf Error: Cannot handle %s "
9300 "in DWARF reader [in module %s]"),
9301 dwarf_form_name (form
),
9302 bfd_get_filename (abfd
));
9306 if (abbrev
->has_children
)
9307 return skip_children (reader
, info_ptr
);
9312 /* Locate ORIG_PDI's sibling.
9313 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
9315 static const gdb_byte
*
9316 locate_pdi_sibling (const struct die_reader_specs
*reader
,
9317 struct partial_die_info
*orig_pdi
,
9318 const gdb_byte
*info_ptr
)
9320 /* Do we know the sibling already? */
9322 if (orig_pdi
->sibling
)
9323 return orig_pdi
->sibling
;
9325 /* Are there any children to deal with? */
9327 if (!orig_pdi
->has_children
)
9330 /* Skip the children the long way. */
9332 return skip_children (reader
, info_ptr
);
9335 /* Expand this partial symbol table into a full symbol table. SELF is
9339 dwarf2_read_symtab (struct partial_symtab
*self
,
9340 struct objfile
*objfile
)
9342 struct dwarf2_per_objfile
*dwarf2_per_objfile
9343 = get_dwarf2_per_objfile (objfile
);
9347 warning (_("bug: psymtab for %s is already read in."),
9354 printf_filtered (_("Reading in symbols for %s..."),
9356 gdb_flush (gdb_stdout
);
9359 /* If this psymtab is constructed from a debug-only objfile, the
9360 has_section_at_zero flag will not necessarily be correct. We
9361 can get the correct value for this flag by looking at the data
9362 associated with the (presumably stripped) associated objfile. */
9363 if (objfile
->separate_debug_objfile_backlink
)
9365 struct dwarf2_per_objfile
*dpo_backlink
9366 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
9368 dwarf2_per_objfile
->has_section_at_zero
9369 = dpo_backlink
->has_section_at_zero
;
9372 dwarf2_per_objfile
->reading_partial_symbols
= 0;
9374 psymtab_to_symtab_1 (self
);
9376 /* Finish up the debug error message. */
9378 printf_filtered (_("done.\n"));
9381 process_cu_includes (dwarf2_per_objfile
);
9384 /* Reading in full CUs. */
9386 /* Add PER_CU to the queue. */
9389 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9390 enum language pretend_language
)
9392 struct dwarf2_queue_item
*item
;
9395 item
= XNEW (struct dwarf2_queue_item
);
9396 item
->per_cu
= per_cu
;
9397 item
->pretend_language
= pretend_language
;
9400 if (dwarf2_queue
== NULL
)
9401 dwarf2_queue
= item
;
9403 dwarf2_queue_tail
->next
= item
;
9405 dwarf2_queue_tail
= item
;
9408 /* If PER_CU is not yet queued, add it to the queue.
9409 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
9411 The result is non-zero if PER_CU was queued, otherwise the result is zero
9412 meaning either PER_CU is already queued or it is already loaded.
9414 N.B. There is an invariant here that if a CU is queued then it is loaded.
9415 The caller is required to load PER_CU if we return non-zero. */
9418 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
9419 struct dwarf2_per_cu_data
*per_cu
,
9420 enum language pretend_language
)
9422 /* We may arrive here during partial symbol reading, if we need full
9423 DIEs to process an unusual case (e.g. template arguments). Do
9424 not queue PER_CU, just tell our caller to load its DIEs. */
9425 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
9427 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
9432 /* Mark the dependence relation so that we don't flush PER_CU
9434 if (dependent_cu
!= NULL
)
9435 dwarf2_add_dependence (dependent_cu
, per_cu
);
9437 /* If it's already on the queue, we have nothing to do. */
9441 /* If the compilation unit is already loaded, just mark it as
9443 if (per_cu
->cu
!= NULL
)
9445 per_cu
->cu
->last_used
= 0;
9449 /* Add it to the queue. */
9450 queue_comp_unit (per_cu
, pretend_language
);
9455 /* Process the queue. */
9458 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9460 struct dwarf2_queue_item
*item
, *next_item
;
9462 if (dwarf_read_debug
)
9464 fprintf_unfiltered (gdb_stdlog
,
9465 "Expanding one or more symtabs of objfile %s ...\n",
9466 objfile_name (dwarf2_per_objfile
->objfile
));
9469 /* The queue starts out with one item, but following a DIE reference
9470 may load a new CU, adding it to the end of the queue. */
9471 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
9473 if ((dwarf2_per_objfile
->using_index
9474 ? !item
->per_cu
->v
.quick
->compunit_symtab
9475 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
9476 /* Skip dummy CUs. */
9477 && item
->per_cu
->cu
!= NULL
)
9479 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
9480 unsigned int debug_print_threshold
;
9483 if (per_cu
->is_debug_types
)
9485 struct signatured_type
*sig_type
=
9486 (struct signatured_type
*) per_cu
;
9488 sprintf (buf
, "TU %s at offset %s",
9489 hex_string (sig_type
->signature
),
9490 sect_offset_str (per_cu
->sect_off
));
9491 /* There can be 100s of TUs.
9492 Only print them in verbose mode. */
9493 debug_print_threshold
= 2;
9497 sprintf (buf
, "CU at offset %s",
9498 sect_offset_str (per_cu
->sect_off
));
9499 debug_print_threshold
= 1;
9502 if (dwarf_read_debug
>= debug_print_threshold
)
9503 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
9505 if (per_cu
->is_debug_types
)
9506 process_full_type_unit (per_cu
, item
->pretend_language
);
9508 process_full_comp_unit (per_cu
, item
->pretend_language
);
9510 if (dwarf_read_debug
>= debug_print_threshold
)
9511 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
9514 item
->per_cu
->queued
= 0;
9515 next_item
= item
->next
;
9519 dwarf2_queue_tail
= NULL
;
9521 if (dwarf_read_debug
)
9523 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
9524 objfile_name (dwarf2_per_objfile
->objfile
));
9528 /* Read in full symbols for PST, and anything it depends on. */
9531 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
9533 struct dwarf2_per_cu_data
*per_cu
;
9539 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
9540 if (!pst
->dependencies
[i
]->readin
9541 && pst
->dependencies
[i
]->user
== NULL
)
9543 /* Inform about additional files that need to be read in. */
9546 /* FIXME: i18n: Need to make this a single string. */
9547 fputs_filtered (" ", gdb_stdout
);
9549 fputs_filtered ("and ", gdb_stdout
);
9551 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
9552 wrap_here (""); /* Flush output. */
9553 gdb_flush (gdb_stdout
);
9555 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
9558 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
9562 /* It's an include file, no symbols to read for it.
9563 Everything is in the parent symtab. */
9568 dw2_do_instantiate_symtab (per_cu
, false);
9571 /* Trivial hash function for die_info: the hash value of a DIE
9572 is its offset in .debug_info for this objfile. */
9575 die_hash (const void *item
)
9577 const struct die_info
*die
= (const struct die_info
*) item
;
9579 return to_underlying (die
->sect_off
);
9582 /* Trivial comparison function for die_info structures: two DIEs
9583 are equal if they have the same offset. */
9586 die_eq (const void *item_lhs
, const void *item_rhs
)
9588 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9589 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9591 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9594 /* die_reader_func for load_full_comp_unit.
9595 This is identical to read_signatured_type_reader,
9596 but is kept separate for now. */
9599 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
9600 const gdb_byte
*info_ptr
,
9601 struct die_info
*comp_unit_die
,
9605 struct dwarf2_cu
*cu
= reader
->cu
;
9606 enum language
*language_ptr
= (enum language
*) data
;
9608 gdb_assert (cu
->die_hash
== NULL
);
9610 htab_create_alloc_ex (cu
->header
.length
/ 12,
9614 &cu
->comp_unit_obstack
,
9615 hashtab_obstack_allocate
,
9616 dummy_obstack_deallocate
);
9619 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
9620 &info_ptr
, comp_unit_die
);
9621 cu
->dies
= comp_unit_die
;
9622 /* comp_unit_die is not stored in die_hash, no need. */
9624 /* We try not to read any attributes in this function, because not
9625 all CUs needed for references have been loaded yet, and symbol
9626 table processing isn't initialized. But we have to set the CU language,
9627 or we won't be able to build types correctly.
9628 Similarly, if we do not read the producer, we can not apply
9629 producer-specific interpretation. */
9630 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
9633 /* Load the DIEs associated with PER_CU into memory. */
9636 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9638 enum language pretend_language
)
9640 gdb_assert (! this_cu
->is_debug_types
);
9642 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1, skip_partial
,
9643 load_full_comp_unit_reader
, &pretend_language
);
9646 /* Add a DIE to the delayed physname list. */
9649 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9650 const char *name
, struct die_info
*die
,
9651 struct dwarf2_cu
*cu
)
9653 struct delayed_method_info mi
;
9655 mi
.fnfield_index
= fnfield_index
;
9659 cu
->method_list
.push_back (mi
);
9662 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9663 "const" / "volatile". If so, decrements LEN by the length of the
9664 modifier and return true. Otherwise return false. */
9668 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9670 size_t mod_len
= sizeof (mod
) - 1;
9671 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9679 /* Compute the physnames of any methods on the CU's method list.
9681 The computation of method physnames is delayed in order to avoid the
9682 (bad) condition that one of the method's formal parameters is of an as yet
9686 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9688 /* Only C++ delays computing physnames. */
9689 if (cu
->method_list
.empty ())
9691 gdb_assert (cu
->language
== language_cplus
);
9693 for (struct delayed_method_info
&mi
: cu
->method_list
)
9695 const char *physname
;
9696 struct fn_fieldlist
*fn_flp
9697 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9698 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9699 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9700 = physname
? physname
: "";
9702 /* Since there's no tag to indicate whether a method is a
9703 const/volatile overload, extract that information out of the
9705 if (physname
!= NULL
)
9707 size_t len
= strlen (physname
);
9711 if (physname
[len
] == ')') /* shortcut */
9713 else if (check_modifier (physname
, len
, " const"))
9714 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9715 else if (check_modifier (physname
, len
, " volatile"))
9716 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9723 /* The list is no longer needed. */
9724 cu
->method_list
.clear ();
9727 /* Go objects should be embedded in a DW_TAG_module DIE,
9728 and it's not clear if/how imported objects will appear.
9729 To keep Go support simple until that's worked out,
9730 go back through what we've read and create something usable.
9731 We could do this while processing each DIE, and feels kinda cleaner,
9732 but that way is more invasive.
9733 This is to, for example, allow the user to type "p var" or "b main"
9734 without having to specify the package name, and allow lookups
9735 of module.object to work in contexts that use the expression
9739 fixup_go_packaging (struct dwarf2_cu
*cu
)
9741 char *package_name
= NULL
;
9742 struct pending
*list
;
9745 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
9747 for (i
= 0; i
< list
->nsyms
; ++i
)
9749 struct symbol
*sym
= list
->symbol
[i
];
9751 if (SYMBOL_LANGUAGE (sym
) == language_go
9752 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9754 char *this_package_name
= go_symbol_package_name (sym
);
9756 if (this_package_name
== NULL
)
9758 if (package_name
== NULL
)
9759 package_name
= this_package_name
;
9762 struct objfile
*objfile
9763 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9764 if (strcmp (package_name
, this_package_name
) != 0)
9765 complaint (&symfile_complaints
,
9766 _("Symtab %s has objects from two different Go packages: %s and %s"),
9767 (symbol_symtab (sym
) != NULL
9768 ? symtab_to_filename_for_display
9769 (symbol_symtab (sym
))
9770 : objfile_name (objfile
)),
9771 this_package_name
, package_name
);
9772 xfree (this_package_name
);
9778 if (package_name
!= NULL
)
9780 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9781 const char *saved_package_name
9782 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
9784 strlen (package_name
));
9785 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9786 saved_package_name
);
9789 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
9791 sym
= allocate_symbol (objfile
);
9792 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
9793 SYMBOL_SET_NAMES (sym
, saved_package_name
,
9794 strlen (saved_package_name
), 0, objfile
);
9795 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9796 e.g., "main" finds the "main" module and not C's main(). */
9797 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9798 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9799 SYMBOL_TYPE (sym
) = type
;
9801 add_symbol_to_list (sym
, &global_symbols
);
9803 xfree (package_name
);
9807 /* Allocate a fully-qualified name consisting of the two parts on the
9811 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9813 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9816 /* A helper that allocates a struct discriminant_info to attach to a
9819 static struct discriminant_info
*
9820 alloc_discriminant_info (struct type
*type
, int discriminant_index
,
9823 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9824 gdb_assert (discriminant_index
== -1
9825 || (discriminant_index
>= 0
9826 && discriminant_index
< TYPE_NFIELDS (type
)));
9827 gdb_assert (default_index
== -1
9828 || (default_index
>= 0 && default_index
< TYPE_NFIELDS (type
)));
9830 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
9832 struct discriminant_info
*disc
9833 = ((struct discriminant_info
*)
9835 offsetof (struct discriminant_info
, discriminants
)
9836 + TYPE_NFIELDS (type
) * sizeof (disc
->discriminants
[0])));
9837 disc
->default_index
= default_index
;
9838 disc
->discriminant_index
= discriminant_index
;
9840 struct dynamic_prop prop
;
9841 prop
.kind
= PROP_UNDEFINED
;
9842 prop
.data
.baton
= disc
;
9844 add_dyn_prop (DYN_PROP_DISCRIMINATED
, prop
, type
);
9849 /* Some versions of rustc emitted enums in an unusual way.
9851 Ordinary enums were emitted as unions. The first element of each
9852 structure in the union was named "RUST$ENUM$DISR". This element
9853 held the discriminant.
9855 These versions of Rust also implemented the "non-zero"
9856 optimization. When the enum had two values, and one is empty and
9857 the other holds a pointer that cannot be zero, the pointer is used
9858 as the discriminant, with a zero value meaning the empty variant.
9859 Here, the union's first member is of the form
9860 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9861 where the fieldnos are the indices of the fields that should be
9862 traversed in order to find the field (which may be several fields deep)
9863 and the variantname is the name of the variant of the case when the
9866 This function recognizes whether TYPE is of one of these forms,
9867 and, if so, smashes it to be a variant type. */
9870 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9872 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9874 /* We don't need to deal with empty enums. */
9875 if (TYPE_NFIELDS (type
) == 0)
9878 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9879 if (TYPE_NFIELDS (type
) == 1
9880 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9882 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9884 /* Decode the field name to find the offset of the
9886 ULONGEST bit_offset
= 0;
9887 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9888 while (name
[0] >= '0' && name
[0] <= '9')
9891 unsigned long index
= strtoul (name
, &tail
, 10);
9894 || index
>= TYPE_NFIELDS (field_type
)
9895 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9896 != FIELD_LOC_KIND_BITPOS
))
9898 complaint (&symfile_complaints
,
9899 _("Could not parse Rust enum encoding string \"%s\""
9901 TYPE_FIELD_NAME (type
, 0),
9902 objfile_name (objfile
));
9907 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9908 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9911 /* Make a union to hold the variants. */
9912 struct type
*union_type
= alloc_type (objfile
);
9913 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9914 TYPE_NFIELDS (union_type
) = 3;
9915 TYPE_FIELDS (union_type
)
9916 = (struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
));
9917 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9918 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
9920 /* Put the discriminant must at index 0. */
9921 TYPE_FIELD_TYPE (union_type
, 0) = field_type
;
9922 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
9923 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
9924 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 0), bit_offset
);
9926 /* The order of fields doesn't really matter, so put the real
9927 field at index 1 and the data-less field at index 2. */
9928 struct discriminant_info
*disc
9929 = alloc_discriminant_info (union_type
, 0, 1);
9930 TYPE_FIELD (union_type
, 1) = TYPE_FIELD (type
, 0);
9931 TYPE_FIELD_NAME (union_type
, 1)
9932 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1)));
9933 TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1))
9934 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9935 TYPE_FIELD_NAME (union_type
, 1));
9937 const char *dataless_name
9938 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9940 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9942 TYPE_FIELD_TYPE (union_type
, 2) = dataless_type
;
9943 /* NAME points into the original discriminant name, which
9944 already has the correct lifetime. */
9945 TYPE_FIELD_NAME (union_type
, 2) = name
;
9946 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 2), 0);
9947 disc
->discriminants
[2] = 0;
9949 /* Smash this type to be a structure type. We have to do this
9950 because the type has already been recorded. */
9951 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9952 TYPE_NFIELDS (type
) = 1;
9954 = (struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
));
9956 /* Install the variant part. */
9957 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9958 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9959 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
9961 else if (TYPE_NFIELDS (type
) == 1)
9963 /* We assume that a union with a single field is a univariant
9965 /* Smash this type to be a structure type. We have to do this
9966 because the type has already been recorded. */
9967 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9969 /* Make a union to hold the variants. */
9970 struct type
*union_type
= alloc_type (objfile
);
9971 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9972 TYPE_NFIELDS (union_type
) = TYPE_NFIELDS (type
);
9973 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9974 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
9975 TYPE_FIELDS (union_type
) = TYPE_FIELDS (type
);
9977 struct type
*field_type
= TYPE_FIELD_TYPE (union_type
, 0);
9978 const char *variant_name
9979 = rust_last_path_segment (TYPE_NAME (field_type
));
9980 TYPE_FIELD_NAME (union_type
, 0) = variant_name
;
9981 TYPE_NAME (field_type
)
9982 = rust_fully_qualify (&objfile
->objfile_obstack
,
9983 TYPE_NAME (type
), variant_name
);
9985 /* Install the union in the outer struct type. */
9986 TYPE_NFIELDS (type
) = 1;
9988 = (struct field
*) TYPE_ZALLOC (union_type
, sizeof (struct field
));
9989 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9990 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
9991 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9993 alloc_discriminant_info (union_type
, -1, 0);
9997 struct type
*disr_type
= nullptr;
9998 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
10000 disr_type
= TYPE_FIELD_TYPE (type
, i
);
10002 if (TYPE_CODE (disr_type
) != TYPE_CODE_STRUCT
)
10004 /* All fields of a true enum will be structs. */
10007 else if (TYPE_NFIELDS (disr_type
) == 0)
10009 /* Could be data-less variant, so keep going. */
10010 disr_type
= nullptr;
10012 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
10013 "RUST$ENUM$DISR") != 0)
10015 /* Not a Rust enum. */
10025 /* If we got here without a discriminant, then it's probably
10027 if (disr_type
== nullptr)
10030 /* Smash this type to be a structure type. We have to do this
10031 because the type has already been recorded. */
10032 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10034 /* Make a union to hold the variants. */
10035 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
10036 struct type
*union_type
= alloc_type (objfile
);
10037 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10038 TYPE_NFIELDS (union_type
) = 1 + TYPE_NFIELDS (type
);
10039 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10040 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
10041 TYPE_FIELDS (union_type
)
10042 = (struct field
*) TYPE_ZALLOC (union_type
,
10043 (TYPE_NFIELDS (union_type
)
10044 * sizeof (struct field
)));
10046 memcpy (TYPE_FIELDS (union_type
) + 1, TYPE_FIELDS (type
),
10047 TYPE_NFIELDS (type
) * sizeof (struct field
));
10049 /* Install the discriminant at index 0 in the union. */
10050 TYPE_FIELD (union_type
, 0) = *disr_field
;
10051 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
10052 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
10054 /* Install the union in the outer struct type. */
10055 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10056 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10057 TYPE_NFIELDS (type
) = 1;
10059 /* Set the size and offset of the union type. */
10060 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10062 /* We need a way to find the correct discriminant given a
10063 variant name. For convenience we build a map here. */
10064 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
10065 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
10066 for (int i
= 0; i
< TYPE_NFIELDS (enum_type
); ++i
)
10068 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
10071 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
10072 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
10076 int n_fields
= TYPE_NFIELDS (union_type
);
10077 struct discriminant_info
*disc
10078 = alloc_discriminant_info (union_type
, 0, -1);
10079 /* Skip the discriminant here. */
10080 for (int i
= 1; i
< n_fields
; ++i
)
10082 /* Find the final word in the name of this variant's type.
10083 That name can be used to look up the correct
10085 const char *variant_name
10086 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
,
10089 auto iter
= discriminant_map
.find (variant_name
);
10090 if (iter
!= discriminant_map
.end ())
10091 disc
->discriminants
[i
] = iter
->second
;
10093 /* Remove the discriminant field, if it exists. */
10094 struct type
*sub_type
= TYPE_FIELD_TYPE (union_type
, i
);
10095 if (TYPE_NFIELDS (sub_type
) > 0)
10097 --TYPE_NFIELDS (sub_type
);
10098 ++TYPE_FIELDS (sub_type
);
10100 TYPE_FIELD_NAME (union_type
, i
) = variant_name
;
10101 TYPE_NAME (sub_type
)
10102 = rust_fully_qualify (&objfile
->objfile_obstack
,
10103 TYPE_NAME (type
), variant_name
);
10108 /* Rewrite some Rust unions to be structures with variants parts. */
10111 rust_union_quirks (struct dwarf2_cu
*cu
)
10113 gdb_assert (cu
->language
== language_rust
);
10114 for (struct type
*type
: cu
->rust_unions
)
10115 quirk_rust_enum (type
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
10116 /* We don't need this any more. */
10117 cu
->rust_unions
.clear ();
10120 /* Return the symtab for PER_CU. This works properly regardless of
10121 whether we're using the index or psymtabs. */
10123 static struct compunit_symtab
*
10124 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
10126 return (per_cu
->dwarf2_per_objfile
->using_index
10127 ? per_cu
->v
.quick
->compunit_symtab
10128 : per_cu
->v
.psymtab
->compunit_symtab
);
10131 /* A helper function for computing the list of all symbol tables
10132 included by PER_CU. */
10135 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
10136 htab_t all_children
, htab_t all_type_symtabs
,
10137 struct dwarf2_per_cu_data
*per_cu
,
10138 struct compunit_symtab
*immediate_parent
)
10142 struct compunit_symtab
*cust
;
10143 struct dwarf2_per_cu_data
*iter
;
10145 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
10148 /* This inclusion and its children have been processed. */
10153 /* Only add a CU if it has a symbol table. */
10154 cust
= get_compunit_symtab (per_cu
);
10157 /* If this is a type unit only add its symbol table if we haven't
10158 seen it yet (type unit per_cu's can share symtabs). */
10159 if (per_cu
->is_debug_types
)
10161 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
10165 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
10166 if (cust
->user
== NULL
)
10167 cust
->user
= immediate_parent
;
10172 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
10173 if (cust
->user
== NULL
)
10174 cust
->user
= immediate_parent
;
10179 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
10182 recursively_compute_inclusions (result
, all_children
,
10183 all_type_symtabs
, iter
, cust
);
10187 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
10191 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
10193 gdb_assert (! per_cu
->is_debug_types
);
10195 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
10198 struct dwarf2_per_cu_data
*per_cu_iter
;
10199 struct compunit_symtab
*compunit_symtab_iter
;
10200 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
10201 htab_t all_children
, all_type_symtabs
;
10202 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
10204 /* If we don't have a symtab, we can just skip this case. */
10208 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10209 NULL
, xcalloc
, xfree
);
10210 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10211 NULL
, xcalloc
, xfree
);
10214 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
10218 recursively_compute_inclusions (&result_symtabs
, all_children
,
10219 all_type_symtabs
, per_cu_iter
,
10223 /* Now we have a transitive closure of all the included symtabs. */
10224 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
10226 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
10227 struct compunit_symtab
*, len
+ 1);
10229 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
10230 compunit_symtab_iter
);
10232 cust
->includes
[ix
] = compunit_symtab_iter
;
10233 cust
->includes
[len
] = NULL
;
10235 VEC_free (compunit_symtab_ptr
, result_symtabs
);
10236 htab_delete (all_children
);
10237 htab_delete (all_type_symtabs
);
10241 /* Compute the 'includes' field for the symtabs of all the CUs we just
10245 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
10248 struct dwarf2_per_cu_data
*iter
;
10251 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
10255 if (! iter
->is_debug_types
)
10256 compute_compunit_symtab_includes (iter
);
10259 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
10262 /* Generate full symbol information for PER_CU, whose DIEs have
10263 already been loaded into memory. */
10266 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
10267 enum language pretend_language
)
10269 struct dwarf2_cu
*cu
= per_cu
->cu
;
10270 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10271 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10272 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10273 CORE_ADDR lowpc
, highpc
;
10274 struct compunit_symtab
*cust
;
10275 CORE_ADDR baseaddr
;
10276 struct block
*static_block
;
10279 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10282 scoped_free_pendings free_pending
;
10284 /* Clear the list here in case something was left over. */
10285 cu
->method_list
.clear ();
10287 cu
->list_in_scope
= &file_symbols
;
10289 cu
->language
= pretend_language
;
10290 cu
->language_defn
= language_def (cu
->language
);
10292 /* Do line number decoding in read_file_scope () */
10293 process_die (cu
->dies
, cu
);
10295 /* For now fudge the Go package. */
10296 if (cu
->language
== language_go
)
10297 fixup_go_packaging (cu
);
10299 /* Now that we have processed all the DIEs in the CU, all the types
10300 should be complete, and it should now be safe to compute all of the
10302 compute_delayed_physnames (cu
);
10304 if (cu
->language
== language_rust
)
10305 rust_union_quirks (cu
);
10307 /* Some compilers don't define a DW_AT_high_pc attribute for the
10308 compilation unit. If the DW_AT_high_pc is missing, synthesize
10309 it, by scanning the DIE's below the compilation unit. */
10310 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
10312 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
10313 static_block
= end_symtab_get_static_block (addr
, 0, 1);
10315 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
10316 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
10317 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
10318 addrmap to help ensure it has an accurate map of pc values belonging to
10320 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
10322 cust
= end_symtab_from_static_block (static_block
,
10323 SECT_OFF_TEXT (objfile
), 0);
10327 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
10329 /* Set symtab language to language from DW_AT_language. If the
10330 compilation is from a C file generated by language preprocessors, do
10331 not set the language if it was already deduced by start_subfile. */
10332 if (!(cu
->language
== language_c
10333 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
10334 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10336 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
10337 produce DW_AT_location with location lists but it can be possibly
10338 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
10339 there were bugs in prologue debug info, fixed later in GCC-4.5
10340 by "unwind info for epilogues" patch (which is not directly related).
10342 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
10343 needed, it would be wrong due to missing DW_AT_producer there.
10345 Still one can confuse GDB by using non-standard GCC compilation
10346 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
10348 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
10349 cust
->locations_valid
= 1;
10351 if (gcc_4_minor
>= 5)
10352 cust
->epilogue_unwind_valid
= 1;
10354 cust
->call_site_htab
= cu
->call_site_htab
;
10357 if (dwarf2_per_objfile
->using_index
)
10358 per_cu
->v
.quick
->compunit_symtab
= cust
;
10361 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10362 pst
->compunit_symtab
= cust
;
10366 /* Push it for inclusion processing later. */
10367 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
10370 /* Generate full symbol information for type unit PER_CU, whose DIEs have
10371 already been loaded into memory. */
10374 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
10375 enum language pretend_language
)
10377 struct dwarf2_cu
*cu
= per_cu
->cu
;
10378 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10379 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10380 struct compunit_symtab
*cust
;
10381 struct signatured_type
*sig_type
;
10383 gdb_assert (per_cu
->is_debug_types
);
10384 sig_type
= (struct signatured_type
*) per_cu
;
10387 scoped_free_pendings free_pending
;
10389 /* Clear the list here in case something was left over. */
10390 cu
->method_list
.clear ();
10392 cu
->list_in_scope
= &file_symbols
;
10394 cu
->language
= pretend_language
;
10395 cu
->language_defn
= language_def (cu
->language
);
10397 /* The symbol tables are set up in read_type_unit_scope. */
10398 process_die (cu
->dies
, cu
);
10400 /* For now fudge the Go package. */
10401 if (cu
->language
== language_go
)
10402 fixup_go_packaging (cu
);
10404 /* Now that we have processed all the DIEs in the CU, all the types
10405 should be complete, and it should now be safe to compute all of the
10407 compute_delayed_physnames (cu
);
10409 if (cu
->language
== language_rust
)
10410 rust_union_quirks (cu
);
10412 /* TUs share symbol tables.
10413 If this is the first TU to use this symtab, complete the construction
10414 of it with end_expandable_symtab. Otherwise, complete the addition of
10415 this TU's symbols to the existing symtab. */
10416 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
10418 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
10419 sig_type
->type_unit_group
->compunit_symtab
= cust
;
10423 /* Set symtab language to language from DW_AT_language. If the
10424 compilation is from a C file generated by language preprocessors,
10425 do not set the language if it was already deduced by
10427 if (!(cu
->language
== language_c
10428 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
10429 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10434 augment_type_symtab ();
10435 cust
= sig_type
->type_unit_group
->compunit_symtab
;
10438 if (dwarf2_per_objfile
->using_index
)
10439 per_cu
->v
.quick
->compunit_symtab
= cust
;
10442 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10443 pst
->compunit_symtab
= cust
;
10448 /* Process an imported unit DIE. */
10451 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10453 struct attribute
*attr
;
10455 /* For now we don't handle imported units in type units. */
10456 if (cu
->per_cu
->is_debug_types
)
10458 error (_("Dwarf Error: DW_TAG_imported_unit is not"
10459 " supported in type units [in module %s]"),
10460 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
10463 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10466 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
10467 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
10468 dwarf2_per_cu_data
*per_cu
10469 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
10470 cu
->per_cu
->dwarf2_per_objfile
);
10472 /* If necessary, add it to the queue and load its DIEs. */
10473 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
10474 load_full_comp_unit (per_cu
, false, cu
->language
);
10476 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
10481 /* RAII object that represents a process_die scope: i.e.,
10482 starts/finishes processing a DIE. */
10483 class process_die_scope
10486 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
10487 : m_die (die
), m_cu (cu
)
10489 /* We should only be processing DIEs not already in process. */
10490 gdb_assert (!m_die
->in_process
);
10491 m_die
->in_process
= true;
10494 ~process_die_scope ()
10496 m_die
->in_process
= false;
10498 /* If we're done processing the DIE for the CU that owns the line
10499 header, we don't need the line header anymore. */
10500 if (m_cu
->line_header_die_owner
== m_die
)
10502 delete m_cu
->line_header
;
10503 m_cu
->line_header
= NULL
;
10504 m_cu
->line_header_die_owner
= NULL
;
10513 /* Process a die and its children. */
10516 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10518 process_die_scope
scope (die
, cu
);
10522 case DW_TAG_padding
:
10524 case DW_TAG_compile_unit
:
10525 case DW_TAG_partial_unit
:
10526 read_file_scope (die
, cu
);
10528 case DW_TAG_type_unit
:
10529 read_type_unit_scope (die
, cu
);
10531 case DW_TAG_subprogram
:
10532 case DW_TAG_inlined_subroutine
:
10533 read_func_scope (die
, cu
);
10535 case DW_TAG_lexical_block
:
10536 case DW_TAG_try_block
:
10537 case DW_TAG_catch_block
:
10538 read_lexical_block_scope (die
, cu
);
10540 case DW_TAG_call_site
:
10541 case DW_TAG_GNU_call_site
:
10542 read_call_site_scope (die
, cu
);
10544 case DW_TAG_class_type
:
10545 case DW_TAG_interface_type
:
10546 case DW_TAG_structure_type
:
10547 case DW_TAG_union_type
:
10548 process_structure_scope (die
, cu
);
10550 case DW_TAG_enumeration_type
:
10551 process_enumeration_scope (die
, cu
);
10554 /* These dies have a type, but processing them does not create
10555 a symbol or recurse to process the children. Therefore we can
10556 read them on-demand through read_type_die. */
10557 case DW_TAG_subroutine_type
:
10558 case DW_TAG_set_type
:
10559 case DW_TAG_array_type
:
10560 case DW_TAG_pointer_type
:
10561 case DW_TAG_ptr_to_member_type
:
10562 case DW_TAG_reference_type
:
10563 case DW_TAG_rvalue_reference_type
:
10564 case DW_TAG_string_type
:
10567 case DW_TAG_base_type
:
10568 case DW_TAG_subrange_type
:
10569 case DW_TAG_typedef
:
10570 /* Add a typedef symbol for the type definition, if it has a
10572 new_symbol (die
, read_type_die (die
, cu
), cu
);
10574 case DW_TAG_common_block
:
10575 read_common_block (die
, cu
);
10577 case DW_TAG_common_inclusion
:
10579 case DW_TAG_namespace
:
10580 cu
->processing_has_namespace_info
= 1;
10581 read_namespace (die
, cu
);
10583 case DW_TAG_module
:
10584 cu
->processing_has_namespace_info
= 1;
10585 read_module (die
, cu
);
10587 case DW_TAG_imported_declaration
:
10588 cu
->processing_has_namespace_info
= 1;
10589 if (read_namespace_alias (die
, cu
))
10591 /* The declaration is not a global namespace alias. */
10592 /* Fall through. */
10593 case DW_TAG_imported_module
:
10594 cu
->processing_has_namespace_info
= 1;
10595 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10596 || cu
->language
!= language_fortran
))
10597 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
10598 dwarf_tag_name (die
->tag
));
10599 read_import_statement (die
, cu
);
10602 case DW_TAG_imported_unit
:
10603 process_imported_unit_die (die
, cu
);
10606 case DW_TAG_variable
:
10607 read_variable (die
, cu
);
10611 new_symbol (die
, NULL
, cu
);
10616 /* DWARF name computation. */
10618 /* A helper function for dwarf2_compute_name which determines whether DIE
10619 needs to have the name of the scope prepended to the name listed in the
10623 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10625 struct attribute
*attr
;
10629 case DW_TAG_namespace
:
10630 case DW_TAG_typedef
:
10631 case DW_TAG_class_type
:
10632 case DW_TAG_interface_type
:
10633 case DW_TAG_structure_type
:
10634 case DW_TAG_union_type
:
10635 case DW_TAG_enumeration_type
:
10636 case DW_TAG_enumerator
:
10637 case DW_TAG_subprogram
:
10638 case DW_TAG_inlined_subroutine
:
10639 case DW_TAG_member
:
10640 case DW_TAG_imported_declaration
:
10643 case DW_TAG_variable
:
10644 case DW_TAG_constant
:
10645 /* We only need to prefix "globally" visible variables. These include
10646 any variable marked with DW_AT_external or any variable that
10647 lives in a namespace. [Variables in anonymous namespaces
10648 require prefixing, but they are not DW_AT_external.] */
10650 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10652 struct dwarf2_cu
*spec_cu
= cu
;
10654 return die_needs_namespace (die_specification (die
, &spec_cu
),
10658 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10659 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10660 && die
->parent
->tag
!= DW_TAG_module
)
10662 /* A variable in a lexical block of some kind does not need a
10663 namespace, even though in C++ such variables may be external
10664 and have a mangled name. */
10665 if (die
->parent
->tag
== DW_TAG_lexical_block
10666 || die
->parent
->tag
== DW_TAG_try_block
10667 || die
->parent
->tag
== DW_TAG_catch_block
10668 || die
->parent
->tag
== DW_TAG_subprogram
)
10677 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10678 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10679 defined for the given DIE. */
10681 static struct attribute
*
10682 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10684 struct attribute
*attr
;
10686 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10688 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10693 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10694 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10695 defined for the given DIE. */
10697 static const char *
10698 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10700 const char *linkage_name
;
10702 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10703 if (linkage_name
== NULL
)
10704 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10706 return linkage_name
;
10709 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10710 compute the physname for the object, which include a method's:
10711 - formal parameters (C++),
10712 - receiver type (Go),
10714 The term "physname" is a bit confusing.
10715 For C++, for example, it is the demangled name.
10716 For Go, for example, it's the mangled name.
10718 For Ada, return the DIE's linkage name rather than the fully qualified
10719 name. PHYSNAME is ignored..
10721 The result is allocated on the objfile_obstack and canonicalized. */
10723 static const char *
10724 dwarf2_compute_name (const char *name
,
10725 struct die_info
*die
, struct dwarf2_cu
*cu
,
10728 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10731 name
= dwarf2_name (die
, cu
);
10733 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10734 but otherwise compute it by typename_concat inside GDB.
10735 FIXME: Actually this is not really true, or at least not always true.
10736 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
10737 Fortran names because there is no mangling standard. So new_symbol
10738 will set the demangled name to the result of dwarf2_full_name, and it is
10739 the demangled name that GDB uses if it exists. */
10740 if (cu
->language
== language_ada
10741 || (cu
->language
== language_fortran
&& physname
))
10743 /* For Ada unit, we prefer the linkage name over the name, as
10744 the former contains the exported name, which the user expects
10745 to be able to reference. Ideally, we want the user to be able
10746 to reference this entity using either natural or linkage name,
10747 but we haven't started looking at this enhancement yet. */
10748 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10750 if (linkage_name
!= NULL
)
10751 return linkage_name
;
10754 /* These are the only languages we know how to qualify names in. */
10756 && (cu
->language
== language_cplus
10757 || cu
->language
== language_fortran
|| cu
->language
== language_d
10758 || cu
->language
== language_rust
))
10760 if (die_needs_namespace (die
, cu
))
10762 const char *prefix
;
10763 const char *canonical_name
= NULL
;
10767 prefix
= determine_prefix (die
, cu
);
10768 if (*prefix
!= '\0')
10770 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
10773 buf
.puts (prefixed_name
);
10774 xfree (prefixed_name
);
10779 /* Template parameters may be specified in the DIE's DW_AT_name, or
10780 as children with DW_TAG_template_type_param or
10781 DW_TAG_value_type_param. If the latter, add them to the name
10782 here. If the name already has template parameters, then
10783 skip this step; some versions of GCC emit both, and
10784 it is more efficient to use the pre-computed name.
10786 Something to keep in mind about this process: it is very
10787 unlikely, or in some cases downright impossible, to produce
10788 something that will match the mangled name of a function.
10789 If the definition of the function has the same debug info,
10790 we should be able to match up with it anyway. But fallbacks
10791 using the minimal symbol, for instance to find a method
10792 implemented in a stripped copy of libstdc++, will not work.
10793 If we do not have debug info for the definition, we will have to
10794 match them up some other way.
10796 When we do name matching there is a related problem with function
10797 templates; two instantiated function templates are allowed to
10798 differ only by their return types, which we do not add here. */
10800 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10802 struct attribute
*attr
;
10803 struct die_info
*child
;
10806 die
->building_fullname
= 1;
10808 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10812 const gdb_byte
*bytes
;
10813 struct dwarf2_locexpr_baton
*baton
;
10816 if (child
->tag
!= DW_TAG_template_type_param
10817 && child
->tag
!= DW_TAG_template_value_param
)
10828 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10831 complaint (&symfile_complaints
,
10832 _("template parameter missing DW_AT_type"));
10833 buf
.puts ("UNKNOWN_TYPE");
10836 type
= die_type (child
, cu
);
10838 if (child
->tag
== DW_TAG_template_type_param
)
10840 c_print_type (type
, "", &buf
, -1, 0, &type_print_raw_options
);
10844 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10847 complaint (&symfile_complaints
,
10848 _("template parameter missing "
10849 "DW_AT_const_value"));
10850 buf
.puts ("UNKNOWN_VALUE");
10854 dwarf2_const_value_attr (attr
, type
, name
,
10855 &cu
->comp_unit_obstack
, cu
,
10856 &value
, &bytes
, &baton
);
10858 if (TYPE_NOSIGN (type
))
10859 /* GDB prints characters as NUMBER 'CHAR'. If that's
10860 changed, this can use value_print instead. */
10861 c_printchar (value
, type
, &buf
);
10864 struct value_print_options opts
;
10867 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10871 else if (bytes
!= NULL
)
10873 v
= allocate_value (type
);
10874 memcpy (value_contents_writeable (v
), bytes
,
10875 TYPE_LENGTH (type
));
10878 v
= value_from_longest (type
, value
);
10880 /* Specify decimal so that we do not depend on
10882 get_formatted_print_options (&opts
, 'd');
10884 value_print (v
, &buf
, &opts
);
10889 die
->building_fullname
= 0;
10893 /* Close the argument list, with a space if necessary
10894 (nested templates). */
10895 if (!buf
.empty () && buf
.string ().back () == '>')
10902 /* For C++ methods, append formal parameter type
10903 information, if PHYSNAME. */
10905 if (physname
&& die
->tag
== DW_TAG_subprogram
10906 && cu
->language
== language_cplus
)
10908 struct type
*type
= read_type_die (die
, cu
);
10910 c_type_print_args (type
, &buf
, 1, cu
->language
,
10911 &type_print_raw_options
);
10913 if (cu
->language
== language_cplus
)
10915 /* Assume that an artificial first parameter is
10916 "this", but do not crash if it is not. RealView
10917 marks unnamed (and thus unused) parameters as
10918 artificial; there is no way to differentiate
10920 if (TYPE_NFIELDS (type
) > 0
10921 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10922 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
10923 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10925 buf
.puts (" const");
10929 const std::string
&intermediate_name
= buf
.string ();
10931 if (cu
->language
== language_cplus
)
10933 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10934 &objfile
->per_bfd
->storage_obstack
);
10936 /* If we only computed INTERMEDIATE_NAME, or if
10937 INTERMEDIATE_NAME is already canonical, then we need to
10938 copy it to the appropriate obstack. */
10939 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10940 name
= ((const char *)
10941 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
10942 intermediate_name
.c_str (),
10943 intermediate_name
.length ()));
10945 name
= canonical_name
;
10952 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10953 If scope qualifiers are appropriate they will be added. The result
10954 will be allocated on the storage_obstack, or NULL if the DIE does
10955 not have a name. NAME may either be from a previous call to
10956 dwarf2_name or NULL.
10958 The output string will be canonicalized (if C++). */
10960 static const char *
10961 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10963 return dwarf2_compute_name (name
, die
, cu
, 0);
10966 /* Construct a physname for the given DIE in CU. NAME may either be
10967 from a previous call to dwarf2_name or NULL. The result will be
10968 allocated on the objfile_objstack or NULL if the DIE does not have a
10971 The output string will be canonicalized (if C++). */
10973 static const char *
10974 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10976 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10977 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10980 /* In this case dwarf2_compute_name is just a shortcut not building anything
10982 if (!die_needs_namespace (die
, cu
))
10983 return dwarf2_compute_name (name
, die
, cu
, 1);
10985 mangled
= dw2_linkage_name (die
, cu
);
10987 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10988 See https://github.com/rust-lang/rust/issues/32925. */
10989 if (cu
->language
== language_rust
&& mangled
!= NULL
10990 && strchr (mangled
, '{') != NULL
)
10993 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
10995 gdb::unique_xmalloc_ptr
<char> demangled
;
10996 if (mangled
!= NULL
)
10999 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
11001 /* Do nothing (do not demangle the symbol name). */
11003 else if (cu
->language
== language_go
)
11005 /* This is a lie, but we already lie to the caller new_symbol.
11006 new_symbol assumes we return the mangled name.
11007 This just undoes that lie until things are cleaned up. */
11011 /* Use DMGL_RET_DROP for C++ template functions to suppress
11012 their return type. It is easier for GDB users to search
11013 for such functions as `name(params)' than `long name(params)'.
11014 In such case the minimal symbol names do not match the full
11015 symbol names but for template functions there is never a need
11016 to look up their definition from their declaration so
11017 the only disadvantage remains the minimal symbol variant
11018 `long name(params)' does not have the proper inferior type. */
11019 demangled
.reset (gdb_demangle (mangled
,
11020 (DMGL_PARAMS
| DMGL_ANSI
11021 | DMGL_RET_DROP
)));
11024 canon
= demangled
.get ();
11032 if (canon
== NULL
|| check_physname
)
11034 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
11036 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
11038 /* It may not mean a bug in GDB. The compiler could also
11039 compute DW_AT_linkage_name incorrectly. But in such case
11040 GDB would need to be bug-to-bug compatible. */
11042 complaint (&symfile_complaints
,
11043 _("Computed physname <%s> does not match demangled <%s> "
11044 "(from linkage <%s>) - DIE at %s [in module %s]"),
11045 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
11046 objfile_name (objfile
));
11048 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
11049 is available here - over computed PHYSNAME. It is safer
11050 against both buggy GDB and buggy compilers. */
11064 retval
= ((const char *)
11065 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
11066 retval
, strlen (retval
)));
11071 /* Inspect DIE in CU for a namespace alias. If one exists, record
11072 a new symbol for it.
11074 Returns 1 if a namespace alias was recorded, 0 otherwise. */
11077 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
11079 struct attribute
*attr
;
11081 /* If the die does not have a name, this is not a namespace
11083 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11087 struct die_info
*d
= die
;
11088 struct dwarf2_cu
*imported_cu
= cu
;
11090 /* If the compiler has nested DW_AT_imported_declaration DIEs,
11091 keep inspecting DIEs until we hit the underlying import. */
11092 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
11093 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
11095 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
11099 d
= follow_die_ref (d
, attr
, &imported_cu
);
11100 if (d
->tag
!= DW_TAG_imported_declaration
)
11104 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
11106 complaint (&symfile_complaints
,
11107 _("DIE at %s has too many recursively imported "
11108 "declarations"), sect_offset_str (d
->sect_off
));
11115 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
11117 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
11118 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
11120 /* This declaration is a global namespace alias. Add
11121 a symbol for it whose type is the aliased namespace. */
11122 new_symbol (die
, type
, cu
);
11131 /* Return the using directives repository (global or local?) to use in the
11132 current context for LANGUAGE.
11134 For Ada, imported declarations can materialize renamings, which *may* be
11135 global. However it is impossible (for now?) in DWARF to distinguish
11136 "external" imported declarations and "static" ones. As all imported
11137 declarations seem to be static in all other languages, make them all CU-wide
11138 global only in Ada. */
11140 static struct using_direct
**
11141 using_directives (enum language language
)
11143 if (language
== language_ada
&& context_stack_depth
== 0)
11144 return &global_using_directives
;
11146 return &local_using_directives
;
11149 /* Read the import statement specified by the given die and record it. */
11152 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
11154 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11155 struct attribute
*import_attr
;
11156 struct die_info
*imported_die
, *child_die
;
11157 struct dwarf2_cu
*imported_cu
;
11158 const char *imported_name
;
11159 const char *imported_name_prefix
;
11160 const char *canonical_name
;
11161 const char *import_alias
;
11162 const char *imported_declaration
= NULL
;
11163 const char *import_prefix
;
11164 std::vector
<const char *> excludes
;
11166 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
11167 if (import_attr
== NULL
)
11169 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
11170 dwarf_tag_name (die
->tag
));
11175 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
11176 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11177 if (imported_name
== NULL
)
11179 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
11181 The import in the following code:
11195 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
11196 <52> DW_AT_decl_file : 1
11197 <53> DW_AT_decl_line : 6
11198 <54> DW_AT_import : <0x75>
11199 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
11200 <59> DW_AT_name : B
11201 <5b> DW_AT_decl_file : 1
11202 <5c> DW_AT_decl_line : 2
11203 <5d> DW_AT_type : <0x6e>
11205 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
11206 <76> DW_AT_byte_size : 4
11207 <77> DW_AT_encoding : 5 (signed)
11209 imports the wrong die ( 0x75 instead of 0x58 ).
11210 This case will be ignored until the gcc bug is fixed. */
11214 /* Figure out the local name after import. */
11215 import_alias
= dwarf2_name (die
, cu
);
11217 /* Figure out where the statement is being imported to. */
11218 import_prefix
= determine_prefix (die
, cu
);
11220 /* Figure out what the scope of the imported die is and prepend it
11221 to the name of the imported die. */
11222 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
11224 if (imported_die
->tag
!= DW_TAG_namespace
11225 && imported_die
->tag
!= DW_TAG_module
)
11227 imported_declaration
= imported_name
;
11228 canonical_name
= imported_name_prefix
;
11230 else if (strlen (imported_name_prefix
) > 0)
11231 canonical_name
= obconcat (&objfile
->objfile_obstack
,
11232 imported_name_prefix
,
11233 (cu
->language
== language_d
? "." : "::"),
11234 imported_name
, (char *) NULL
);
11236 canonical_name
= imported_name
;
11238 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
11239 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11240 child_die
= sibling_die (child_die
))
11242 /* DWARF-4: A Fortran use statement with a “rename list” may be
11243 represented by an imported module entry with an import attribute
11244 referring to the module and owned entries corresponding to those
11245 entities that are renamed as part of being imported. */
11247 if (child_die
->tag
!= DW_TAG_imported_declaration
)
11249 complaint (&symfile_complaints
,
11250 _("child DW_TAG_imported_declaration expected "
11251 "- DIE at %s [in module %s]"),
11252 sect_offset_str (child_die
->sect_off
),
11253 objfile_name (objfile
));
11257 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
11258 if (import_attr
== NULL
)
11260 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
11261 dwarf_tag_name (child_die
->tag
));
11266 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
11268 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11269 if (imported_name
== NULL
)
11271 complaint (&symfile_complaints
,
11272 _("child DW_TAG_imported_declaration has unknown "
11273 "imported name - DIE at %s [in module %s]"),
11274 sect_offset_str (child_die
->sect_off
),
11275 objfile_name (objfile
));
11279 excludes
.push_back (imported_name
);
11281 process_die (child_die
, cu
);
11284 add_using_directive (using_directives (cu
->language
),
11288 imported_declaration
,
11291 &objfile
->objfile_obstack
);
11294 /* ICC<14 does not output the required DW_AT_declaration on incomplete
11295 types, but gives them a size of zero. Starting with version 14,
11296 ICC is compatible with GCC. */
11299 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
11301 if (!cu
->checked_producer
)
11302 check_producer (cu
);
11304 return cu
->producer_is_icc_lt_14
;
11307 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
11308 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
11309 this, it was first present in GCC release 4.3.0. */
11312 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
11314 if (!cu
->checked_producer
)
11315 check_producer (cu
);
11317 return cu
->producer_is_gcc_lt_4_3
;
11320 static file_and_directory
11321 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
11323 file_and_directory res
;
11325 /* Find the filename. Do not use dwarf2_name here, since the filename
11326 is not a source language identifier. */
11327 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
11328 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
11330 if (res
.comp_dir
== NULL
11331 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
11332 && IS_ABSOLUTE_PATH (res
.name
))
11334 res
.comp_dir_storage
= ldirname (res
.name
);
11335 if (!res
.comp_dir_storage
.empty ())
11336 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
11338 if (res
.comp_dir
!= NULL
)
11340 /* Irix 6.2 native cc prepends <machine>.: to the compilation
11341 directory, get rid of it. */
11342 const char *cp
= strchr (res
.comp_dir
, ':');
11344 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
11345 res
.comp_dir
= cp
+ 1;
11348 if (res
.name
== NULL
)
11349 res
.name
= "<unknown>";
11354 /* Handle DW_AT_stmt_list for a compilation unit.
11355 DIE is the DW_TAG_compile_unit die for CU.
11356 COMP_DIR is the compilation directory. LOWPC is passed to
11357 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
11360 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
11361 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
11363 struct dwarf2_per_objfile
*dwarf2_per_objfile
11364 = cu
->per_cu
->dwarf2_per_objfile
;
11365 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11366 struct attribute
*attr
;
11367 struct line_header line_header_local
;
11368 hashval_t line_header_local_hash
;
11370 int decode_mapping
;
11372 gdb_assert (! cu
->per_cu
->is_debug_types
);
11374 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11378 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11380 /* The line header hash table is only created if needed (it exists to
11381 prevent redundant reading of the line table for partial_units).
11382 If we're given a partial_unit, we'll need it. If we're given a
11383 compile_unit, then use the line header hash table if it's already
11384 created, but don't create one just yet. */
11386 if (dwarf2_per_objfile
->line_header_hash
== NULL
11387 && die
->tag
== DW_TAG_partial_unit
)
11389 dwarf2_per_objfile
->line_header_hash
11390 = htab_create_alloc_ex (127, line_header_hash_voidp
,
11391 line_header_eq_voidp
,
11392 free_line_header_voidp
,
11393 &objfile
->objfile_obstack
,
11394 hashtab_obstack_allocate
,
11395 dummy_obstack_deallocate
);
11398 line_header_local
.sect_off
= line_offset
;
11399 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
11400 line_header_local_hash
= line_header_hash (&line_header_local
);
11401 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
11403 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11404 &line_header_local
,
11405 line_header_local_hash
, NO_INSERT
);
11407 /* For DW_TAG_compile_unit we need info like symtab::linetable which
11408 is not present in *SLOT (since if there is something in *SLOT then
11409 it will be for a partial_unit). */
11410 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
11412 gdb_assert (*slot
!= NULL
);
11413 cu
->line_header
= (struct line_header
*) *slot
;
11418 /* dwarf_decode_line_header does not yet provide sufficient information.
11419 We always have to call also dwarf_decode_lines for it. */
11420 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
11424 cu
->line_header
= lh
.release ();
11425 cu
->line_header_die_owner
= die
;
11427 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
11431 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11432 &line_header_local
,
11433 line_header_local_hash
, INSERT
);
11434 gdb_assert (slot
!= NULL
);
11436 if (slot
!= NULL
&& *slot
== NULL
)
11438 /* This newly decoded line number information unit will be owned
11439 by line_header_hash hash table. */
11440 *slot
= cu
->line_header
;
11441 cu
->line_header_die_owner
= NULL
;
11445 /* We cannot free any current entry in (*slot) as that struct line_header
11446 may be already used by multiple CUs. Create only temporary decoded
11447 line_header for this CU - it may happen at most once for each line
11448 number information unit. And if we're not using line_header_hash
11449 then this is what we want as well. */
11450 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
11452 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
11453 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
11458 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
11461 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11463 struct dwarf2_per_objfile
*dwarf2_per_objfile
11464 = cu
->per_cu
->dwarf2_per_objfile
;
11465 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11466 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11467 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
11468 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
11469 struct attribute
*attr
;
11470 struct die_info
*child_die
;
11471 CORE_ADDR baseaddr
;
11473 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11475 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
11477 /* If we didn't find a lowpc, set it to highpc to avoid complaints
11478 from finish_block. */
11479 if (lowpc
== ((CORE_ADDR
) -1))
11481 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11483 file_and_directory fnd
= find_file_and_directory (die
, cu
);
11485 prepare_one_comp_unit (cu
, die
, cu
->language
);
11487 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
11488 standardised yet. As a workaround for the language detection we fall
11489 back to the DW_AT_producer string. */
11490 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
11491 cu
->language
= language_opencl
;
11493 /* Similar hack for Go. */
11494 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
11495 set_cu_language (DW_LANG_Go
, cu
);
11497 dwarf2_start_symtab (cu
, fnd
.name
, fnd
.comp_dir
, lowpc
);
11499 /* Decode line number information if present. We do this before
11500 processing child DIEs, so that the line header table is available
11501 for DW_AT_decl_file. */
11502 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
11504 /* Process all dies in compilation unit. */
11505 if (die
->child
!= NULL
)
11507 child_die
= die
->child
;
11508 while (child_die
&& child_die
->tag
)
11510 process_die (child_die
, cu
);
11511 child_die
= sibling_die (child_die
);
11515 /* Decode macro information, if present. Dwarf 2 macro information
11516 refers to information in the line number info statement program
11517 header, so we can only read it if we've read the header
11519 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11521 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11522 if (attr
&& cu
->line_header
)
11524 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11525 complaint (&symfile_complaints
,
11526 _("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11528 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
11532 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11533 if (attr
&& cu
->line_header
)
11535 unsigned int macro_offset
= DW_UNSND (attr
);
11537 dwarf_decode_macros (cu
, macro_offset
, 0);
11542 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
11543 Create the set of symtabs used by this TU, or if this TU is sharing
11544 symtabs with another TU and the symtabs have already been created
11545 then restore those symtabs in the line header.
11546 We don't need the pc/line-number mapping for type units. */
11549 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
11551 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
11552 struct type_unit_group
*tu_group
;
11554 struct attribute
*attr
;
11556 struct signatured_type
*sig_type
;
11558 gdb_assert (per_cu
->is_debug_types
);
11559 sig_type
= (struct signatured_type
*) per_cu
;
11561 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11563 /* If we're using .gdb_index (includes -readnow) then
11564 per_cu->type_unit_group may not have been set up yet. */
11565 if (sig_type
->type_unit_group
== NULL
)
11566 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
11567 tu_group
= sig_type
->type_unit_group
;
11569 /* If we've already processed this stmt_list there's no real need to
11570 do it again, we could fake it and just recreate the part we need
11571 (file name,index -> symtab mapping). If data shows this optimization
11572 is useful we can do it then. */
11573 first_time
= tu_group
->compunit_symtab
== NULL
;
11575 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11580 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11581 lh
= dwarf_decode_line_header (line_offset
, cu
);
11586 dwarf2_start_symtab (cu
, "", NULL
, 0);
11589 gdb_assert (tu_group
->symtabs
== NULL
);
11590 restart_symtab (tu_group
->compunit_symtab
, "", 0);
11595 cu
->line_header
= lh
.release ();
11596 cu
->line_header_die_owner
= die
;
11600 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
11602 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11603 still initializing it, and our caller (a few levels up)
11604 process_full_type_unit still needs to know if this is the first
11607 tu_group
->num_symtabs
= cu
->line_header
->file_names
.size ();
11608 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
11609 cu
->line_header
->file_names
.size ());
11611 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
11613 file_entry
&fe
= cu
->line_header
->file_names
[i
];
11615 dwarf2_start_subfile (fe
.name
, fe
.include_dir (cu
->line_header
));
11617 if (current_subfile
->symtab
== NULL
)
11619 /* NOTE: start_subfile will recognize when it's been
11620 passed a file it has already seen. So we can't
11621 assume there's a simple mapping from
11622 cu->line_header->file_names to subfiles, plus
11623 cu->line_header->file_names may contain dups. */
11624 current_subfile
->symtab
11625 = allocate_symtab (cust
, current_subfile
->name
);
11628 fe
.symtab
= current_subfile
->symtab
;
11629 tu_group
->symtabs
[i
] = fe
.symtab
;
11634 restart_symtab (tu_group
->compunit_symtab
, "", 0);
11636 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
11638 file_entry
&fe
= cu
->line_header
->file_names
[i
];
11640 fe
.symtab
= tu_group
->symtabs
[i
];
11644 /* The main symtab is allocated last. Type units don't have DW_AT_name
11645 so they don't have a "real" (so to speak) symtab anyway.
11646 There is later code that will assign the main symtab to all symbols
11647 that don't have one. We need to handle the case of a symbol with a
11648 missing symtab (DW_AT_decl_file) anyway. */
11651 /* Process DW_TAG_type_unit.
11652 For TUs we want to skip the first top level sibling if it's not the
11653 actual type being defined by this TU. In this case the first top
11654 level sibling is there to provide context only. */
11657 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11659 struct die_info
*child_die
;
11661 prepare_one_comp_unit (cu
, die
, language_minimal
);
11663 /* Initialize (or reinitialize) the machinery for building symtabs.
11664 We do this before processing child DIEs, so that the line header table
11665 is available for DW_AT_decl_file. */
11666 setup_type_unit_groups (die
, cu
);
11668 if (die
->child
!= NULL
)
11670 child_die
= die
->child
;
11671 while (child_die
&& child_die
->tag
)
11673 process_die (child_die
, cu
);
11674 child_die
= sibling_die (child_die
);
11681 http://gcc.gnu.org/wiki/DebugFission
11682 http://gcc.gnu.org/wiki/DebugFissionDWP
11684 To simplify handling of both DWO files ("object" files with the DWARF info)
11685 and DWP files (a file with the DWOs packaged up into one file), we treat
11686 DWP files as having a collection of virtual DWO files. */
11689 hash_dwo_file (const void *item
)
11691 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11694 hash
= htab_hash_string (dwo_file
->dwo_name
);
11695 if (dwo_file
->comp_dir
!= NULL
)
11696 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11701 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11703 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11704 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11706 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11708 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11709 return lhs
->comp_dir
== rhs
->comp_dir
;
11710 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11713 /* Allocate a hash table for DWO files. */
11716 allocate_dwo_file_hash_table (struct objfile
*objfile
)
11718 return htab_create_alloc_ex (41,
11722 &objfile
->objfile_obstack
,
11723 hashtab_obstack_allocate
,
11724 dummy_obstack_deallocate
);
11727 /* Lookup DWO file DWO_NAME. */
11730 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11731 const char *dwo_name
,
11732 const char *comp_dir
)
11734 struct dwo_file find_entry
;
11737 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11738 dwarf2_per_objfile
->dwo_files
11739 = allocate_dwo_file_hash_table (dwarf2_per_objfile
->objfile
);
11741 memset (&find_entry
, 0, sizeof (find_entry
));
11742 find_entry
.dwo_name
= dwo_name
;
11743 find_entry
.comp_dir
= comp_dir
;
11744 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
11750 hash_dwo_unit (const void *item
)
11752 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11754 /* This drops the top 32 bits of the id, but is ok for a hash. */
11755 return dwo_unit
->signature
;
11759 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11761 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11762 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11764 /* The signature is assumed to be unique within the DWO file.
11765 So while object file CU dwo_id's always have the value zero,
11766 that's OK, assuming each object file DWO file has only one CU,
11767 and that's the rule for now. */
11768 return lhs
->signature
== rhs
->signature
;
11771 /* Allocate a hash table for DWO CUs,TUs.
11772 There is one of these tables for each of CUs,TUs for each DWO file. */
11775 allocate_dwo_unit_table (struct objfile
*objfile
)
11777 /* Start out with a pretty small number.
11778 Generally DWO files contain only one CU and maybe some TUs. */
11779 return htab_create_alloc_ex (3,
11783 &objfile
->objfile_obstack
,
11784 hashtab_obstack_allocate
,
11785 dummy_obstack_deallocate
);
11788 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
11790 struct create_dwo_cu_data
11792 struct dwo_file
*dwo_file
;
11793 struct dwo_unit dwo_unit
;
11796 /* die_reader_func for create_dwo_cu. */
11799 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11800 const gdb_byte
*info_ptr
,
11801 struct die_info
*comp_unit_die
,
11805 struct dwarf2_cu
*cu
= reader
->cu
;
11806 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11807 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11808 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
11809 struct dwo_file
*dwo_file
= data
->dwo_file
;
11810 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
11811 struct attribute
*attr
;
11813 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
11816 complaint (&symfile_complaints
,
11817 _("Dwarf Error: debug entry at offset %s is missing"
11818 " its dwo_id [in module %s]"),
11819 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11823 dwo_unit
->dwo_file
= dwo_file
;
11824 dwo_unit
->signature
= DW_UNSND (attr
);
11825 dwo_unit
->section
= section
;
11826 dwo_unit
->sect_off
= sect_off
;
11827 dwo_unit
->length
= cu
->per_cu
->length
;
11829 if (dwarf_read_debug
)
11830 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11831 sect_offset_str (sect_off
),
11832 hex_string (dwo_unit
->signature
));
11835 /* Create the dwo_units for the CUs in a DWO_FILE.
11836 Note: This function processes DWO files only, not DWP files. */
11839 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11840 struct dwo_file
&dwo_file
, dwarf2_section_info
§ion
,
11843 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11844 const gdb_byte
*info_ptr
, *end_ptr
;
11846 dwarf2_read_section (objfile
, §ion
);
11847 info_ptr
= section
.buffer
;
11849 if (info_ptr
== NULL
)
11852 if (dwarf_read_debug
)
11854 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11855 get_section_name (§ion
),
11856 get_section_file_name (§ion
));
11859 end_ptr
= info_ptr
+ section
.size
;
11860 while (info_ptr
< end_ptr
)
11862 struct dwarf2_per_cu_data per_cu
;
11863 struct create_dwo_cu_data create_dwo_cu_data
;
11864 struct dwo_unit
*dwo_unit
;
11866 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11868 memset (&create_dwo_cu_data
.dwo_unit
, 0,
11869 sizeof (create_dwo_cu_data
.dwo_unit
));
11870 memset (&per_cu
, 0, sizeof (per_cu
));
11871 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11872 per_cu
.is_debug_types
= 0;
11873 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11874 per_cu
.section
= §ion
;
11875 create_dwo_cu_data
.dwo_file
= &dwo_file
;
11877 init_cutu_and_read_dies_no_follow (
11878 &per_cu
, &dwo_file
, create_dwo_cu_reader
, &create_dwo_cu_data
);
11879 info_ptr
+= per_cu
.length
;
11881 // If the unit could not be parsed, skip it.
11882 if (create_dwo_cu_data
.dwo_unit
.dwo_file
== NULL
)
11885 if (cus_htab
== NULL
)
11886 cus_htab
= allocate_dwo_unit_table (objfile
);
11888 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11889 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
11890 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
11891 gdb_assert (slot
!= NULL
);
11894 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11895 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11897 complaint (&symfile_complaints
,
11898 _("debug cu entry at offset %s is duplicate to"
11899 " the entry at offset %s, signature %s"),
11900 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11901 hex_string (dwo_unit
->signature
));
11903 *slot
= (void *)dwo_unit
;
11907 /* DWP file .debug_{cu,tu}_index section format:
11908 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11912 Both index sections have the same format, and serve to map a 64-bit
11913 signature to a set of section numbers. Each section begins with a header,
11914 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11915 indexes, and a pool of 32-bit section numbers. The index sections will be
11916 aligned at 8-byte boundaries in the file.
11918 The index section header consists of:
11920 V, 32 bit version number
11922 N, 32 bit number of compilation units or type units in the index
11923 M, 32 bit number of slots in the hash table
11925 Numbers are recorded using the byte order of the application binary.
11927 The hash table begins at offset 16 in the section, and consists of an array
11928 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11929 order of the application binary). Unused slots in the hash table are 0.
11930 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11932 The parallel table begins immediately after the hash table
11933 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11934 array of 32-bit indexes (using the byte order of the application binary),
11935 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11936 table contains a 32-bit index into the pool of section numbers. For unused
11937 hash table slots, the corresponding entry in the parallel table will be 0.
11939 The pool of section numbers begins immediately following the hash table
11940 (at offset 16 + 12 * M from the beginning of the section). The pool of
11941 section numbers consists of an array of 32-bit words (using the byte order
11942 of the application binary). Each item in the array is indexed starting
11943 from 0. The hash table entry provides the index of the first section
11944 number in the set. Additional section numbers in the set follow, and the
11945 set is terminated by a 0 entry (section number 0 is not used in ELF).
11947 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11948 section must be the first entry in the set, and the .debug_abbrev.dwo must
11949 be the second entry. Other members of the set may follow in any order.
11955 DWP Version 2 combines all the .debug_info, etc. sections into one,
11956 and the entries in the index tables are now offsets into these sections.
11957 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11960 Index Section Contents:
11962 Hash Table of Signatures dwp_hash_table.hash_table
11963 Parallel Table of Indices dwp_hash_table.unit_table
11964 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
11965 Table of Section Sizes dwp_hash_table.v2.sizes
11967 The index section header consists of:
11969 V, 32 bit version number
11970 L, 32 bit number of columns in the table of section offsets
11971 N, 32 bit number of compilation units or type units in the index
11972 M, 32 bit number of slots in the hash table
11974 Numbers are recorded using the byte order of the application binary.
11976 The hash table has the same format as version 1.
11977 The parallel table of indices has the same format as version 1,
11978 except that the entries are origin-1 indices into the table of sections
11979 offsets and the table of section sizes.
11981 The table of offsets begins immediately following the parallel table
11982 (at offset 16 + 12 * M from the beginning of the section). The table is
11983 a two-dimensional array of 32-bit words (using the byte order of the
11984 application binary), with L columns and N+1 rows, in row-major order.
11985 Each row in the array is indexed starting from 0. The first row provides
11986 a key to the remaining rows: each column in this row provides an identifier
11987 for a debug section, and the offsets in the same column of subsequent rows
11988 refer to that section. The section identifiers are:
11990 DW_SECT_INFO 1 .debug_info.dwo
11991 DW_SECT_TYPES 2 .debug_types.dwo
11992 DW_SECT_ABBREV 3 .debug_abbrev.dwo
11993 DW_SECT_LINE 4 .debug_line.dwo
11994 DW_SECT_LOC 5 .debug_loc.dwo
11995 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
11996 DW_SECT_MACINFO 7 .debug_macinfo.dwo
11997 DW_SECT_MACRO 8 .debug_macro.dwo
11999 The offsets provided by the CU and TU index sections are the base offsets
12000 for the contributions made by each CU or TU to the corresponding section
12001 in the package file. Each CU and TU header contains an abbrev_offset
12002 field, used to find the abbreviations table for that CU or TU within the
12003 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
12004 be interpreted as relative to the base offset given in the index section.
12005 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
12006 should be interpreted as relative to the base offset for .debug_line.dwo,
12007 and offsets into other debug sections obtained from DWARF attributes should
12008 also be interpreted as relative to the corresponding base offset.
12010 The table of sizes begins immediately following the table of offsets.
12011 Like the table of offsets, it is a two-dimensional array of 32-bit words,
12012 with L columns and N rows, in row-major order. Each row in the array is
12013 indexed starting from 1 (row 0 is shared by the two tables).
12017 Hash table lookup is handled the same in version 1 and 2:
12019 We assume that N and M will not exceed 2^32 - 1.
12020 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
12022 Given a 64-bit compilation unit signature or a type signature S, an entry
12023 in the hash table is located as follows:
12025 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
12026 the low-order k bits all set to 1.
12028 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
12030 3) If the hash table entry at index H matches the signature, use that
12031 entry. If the hash table entry at index H is unused (all zeroes),
12032 terminate the search: the signature is not present in the table.
12034 4) Let H = (H + H') modulo M. Repeat at Step 3.
12036 Because M > N and H' and M are relatively prime, the search is guaranteed
12037 to stop at an unused slot or find the match. */
12039 /* Create a hash table to map DWO IDs to their CU/TU entry in
12040 .debug_{info,types}.dwo in DWP_FILE.
12041 Returns NULL if there isn't one.
12042 Note: This function processes DWP files only, not DWO files. */
12044 static struct dwp_hash_table
*
12045 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12046 struct dwp_file
*dwp_file
, int is_debug_types
)
12048 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12049 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12050 const gdb_byte
*index_ptr
, *index_end
;
12051 struct dwarf2_section_info
*index
;
12052 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
12053 struct dwp_hash_table
*htab
;
12055 if (is_debug_types
)
12056 index
= &dwp_file
->sections
.tu_index
;
12058 index
= &dwp_file
->sections
.cu_index
;
12060 if (dwarf2_section_empty_p (index
))
12062 dwarf2_read_section (objfile
, index
);
12064 index_ptr
= index
->buffer
;
12065 index_end
= index_ptr
+ index
->size
;
12067 version
= read_4_bytes (dbfd
, index_ptr
);
12070 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
12074 nr_units
= read_4_bytes (dbfd
, index_ptr
);
12076 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
12079 if (version
!= 1 && version
!= 2)
12081 error (_("Dwarf Error: unsupported DWP file version (%s)"
12082 " [in module %s]"),
12083 pulongest (version
), dwp_file
->name
);
12085 if (nr_slots
!= (nr_slots
& -nr_slots
))
12087 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
12088 " is not power of 2 [in module %s]"),
12089 pulongest (nr_slots
), dwp_file
->name
);
12092 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
12093 htab
->version
= version
;
12094 htab
->nr_columns
= nr_columns
;
12095 htab
->nr_units
= nr_units
;
12096 htab
->nr_slots
= nr_slots
;
12097 htab
->hash_table
= index_ptr
;
12098 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
12100 /* Exit early if the table is empty. */
12101 if (nr_slots
== 0 || nr_units
== 0
12102 || (version
== 2 && nr_columns
== 0))
12104 /* All must be zero. */
12105 if (nr_slots
!= 0 || nr_units
!= 0
12106 || (version
== 2 && nr_columns
!= 0))
12108 complaint (&symfile_complaints
,
12109 _("Empty DWP but nr_slots,nr_units,nr_columns not"
12110 " all zero [in modules %s]"),
12118 htab
->section_pool
.v1
.indices
=
12119 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12120 /* It's harder to decide whether the section is too small in v1.
12121 V1 is deprecated anyway so we punt. */
12125 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12126 int *ids
= htab
->section_pool
.v2
.section_ids
;
12127 /* Reverse map for error checking. */
12128 int ids_seen
[DW_SECT_MAX
+ 1];
12131 if (nr_columns
< 2)
12133 error (_("Dwarf Error: bad DWP hash table, too few columns"
12134 " in section table [in module %s]"),
12137 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
12139 error (_("Dwarf Error: bad DWP hash table, too many columns"
12140 " in section table [in module %s]"),
12143 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
12144 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
12145 for (i
= 0; i
< nr_columns
; ++i
)
12147 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
12149 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
12151 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
12152 " in section table [in module %s]"),
12153 id
, dwp_file
->name
);
12155 if (ids_seen
[id
] != -1)
12157 error (_("Dwarf Error: bad DWP hash table, duplicate section"
12158 " id %d in section table [in module %s]"),
12159 id
, dwp_file
->name
);
12164 /* Must have exactly one info or types section. */
12165 if (((ids_seen
[DW_SECT_INFO
] != -1)
12166 + (ids_seen
[DW_SECT_TYPES
] != -1))
12169 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
12170 " DWO info/types section [in module %s]"),
12173 /* Must have an abbrev section. */
12174 if (ids_seen
[DW_SECT_ABBREV
] == -1)
12176 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
12177 " section [in module %s]"),
12180 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
12181 htab
->section_pool
.v2
.sizes
=
12182 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
12183 * nr_units
* nr_columns
);
12184 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
12185 * nr_units
* nr_columns
))
12188 error (_("Dwarf Error: DWP index section is corrupt (too small)"
12189 " [in module %s]"),
12197 /* Update SECTIONS with the data from SECTP.
12199 This function is like the other "locate" section routines that are
12200 passed to bfd_map_over_sections, but in this context the sections to
12201 read comes from the DWP V1 hash table, not the full ELF section table.
12203 The result is non-zero for success, or zero if an error was found. */
12206 locate_v1_virtual_dwo_sections (asection
*sectp
,
12207 struct virtual_v1_dwo_sections
*sections
)
12209 const struct dwop_section_names
*names
= &dwop_section_names
;
12211 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12213 /* There can be only one. */
12214 if (sections
->abbrev
.s
.section
!= NULL
)
12216 sections
->abbrev
.s
.section
= sectp
;
12217 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12219 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
12220 || section_is_p (sectp
->name
, &names
->types_dwo
))
12222 /* There can be only one. */
12223 if (sections
->info_or_types
.s
.section
!= NULL
)
12225 sections
->info_or_types
.s
.section
= sectp
;
12226 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
12228 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12230 /* There can be only one. */
12231 if (sections
->line
.s
.section
!= NULL
)
12233 sections
->line
.s
.section
= sectp
;
12234 sections
->line
.size
= bfd_get_section_size (sectp
);
12236 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12238 /* There can be only one. */
12239 if (sections
->loc
.s
.section
!= NULL
)
12241 sections
->loc
.s
.section
= sectp
;
12242 sections
->loc
.size
= bfd_get_section_size (sectp
);
12244 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12246 /* There can be only one. */
12247 if (sections
->macinfo
.s
.section
!= NULL
)
12249 sections
->macinfo
.s
.section
= sectp
;
12250 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12252 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12254 /* There can be only one. */
12255 if (sections
->macro
.s
.section
!= NULL
)
12257 sections
->macro
.s
.section
= sectp
;
12258 sections
->macro
.size
= bfd_get_section_size (sectp
);
12260 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12262 /* There can be only one. */
12263 if (sections
->str_offsets
.s
.section
!= NULL
)
12265 sections
->str_offsets
.s
.section
= sectp
;
12266 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12270 /* No other kind of section is valid. */
12277 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12278 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12279 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12280 This is for DWP version 1 files. */
12282 static struct dwo_unit
*
12283 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12284 struct dwp_file
*dwp_file
,
12285 uint32_t unit_index
,
12286 const char *comp_dir
,
12287 ULONGEST signature
, int is_debug_types
)
12289 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12290 const struct dwp_hash_table
*dwp_htab
=
12291 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12292 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12293 const char *kind
= is_debug_types
? "TU" : "CU";
12294 struct dwo_file
*dwo_file
;
12295 struct dwo_unit
*dwo_unit
;
12296 struct virtual_v1_dwo_sections sections
;
12297 void **dwo_file_slot
;
12300 gdb_assert (dwp_file
->version
== 1);
12302 if (dwarf_read_debug
)
12304 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
12306 pulongest (unit_index
), hex_string (signature
),
12310 /* Fetch the sections of this DWO unit.
12311 Put a limit on the number of sections we look for so that bad data
12312 doesn't cause us to loop forever. */
12314 #define MAX_NR_V1_DWO_SECTIONS \
12315 (1 /* .debug_info or .debug_types */ \
12316 + 1 /* .debug_abbrev */ \
12317 + 1 /* .debug_line */ \
12318 + 1 /* .debug_loc */ \
12319 + 1 /* .debug_str_offsets */ \
12320 + 1 /* .debug_macro or .debug_macinfo */ \
12321 + 1 /* trailing zero */)
12323 memset (§ions
, 0, sizeof (sections
));
12325 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
12328 uint32_t section_nr
=
12329 read_4_bytes (dbfd
,
12330 dwp_htab
->section_pool
.v1
.indices
12331 + (unit_index
+ i
) * sizeof (uint32_t));
12333 if (section_nr
== 0)
12335 if (section_nr
>= dwp_file
->num_sections
)
12337 error (_("Dwarf Error: bad DWP hash table, section number too large"
12338 " [in module %s]"),
12342 sectp
= dwp_file
->elf_sections
[section_nr
];
12343 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
12345 error (_("Dwarf Error: bad DWP hash table, invalid section found"
12346 " [in module %s]"),
12352 || dwarf2_section_empty_p (§ions
.info_or_types
)
12353 || dwarf2_section_empty_p (§ions
.abbrev
))
12355 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
12356 " [in module %s]"),
12359 if (i
== MAX_NR_V1_DWO_SECTIONS
)
12361 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
12362 " [in module %s]"),
12366 /* It's easier for the rest of the code if we fake a struct dwo_file and
12367 have dwo_unit "live" in that. At least for now.
12369 The DWP file can be made up of a random collection of CUs and TUs.
12370 However, for each CU + set of TUs that came from the same original DWO
12371 file, we can combine them back into a virtual DWO file to save space
12372 (fewer struct dwo_file objects to allocate). Remember that for really
12373 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12375 std::string virtual_dwo_name
=
12376 string_printf ("virtual-dwo/%d-%d-%d-%d",
12377 get_section_id (§ions
.abbrev
),
12378 get_section_id (§ions
.line
),
12379 get_section_id (§ions
.loc
),
12380 get_section_id (§ions
.str_offsets
));
12381 /* Can we use an existing virtual DWO file? */
12382 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12383 virtual_dwo_name
.c_str (),
12385 /* Create one if necessary. */
12386 if (*dwo_file_slot
== NULL
)
12388 if (dwarf_read_debug
)
12390 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12391 virtual_dwo_name
.c_str ());
12393 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12395 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12396 virtual_dwo_name
.c_str (),
12397 virtual_dwo_name
.size ());
12398 dwo_file
->comp_dir
= comp_dir
;
12399 dwo_file
->sections
.abbrev
= sections
.abbrev
;
12400 dwo_file
->sections
.line
= sections
.line
;
12401 dwo_file
->sections
.loc
= sections
.loc
;
12402 dwo_file
->sections
.macinfo
= sections
.macinfo
;
12403 dwo_file
->sections
.macro
= sections
.macro
;
12404 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
12405 /* The "str" section is global to the entire DWP file. */
12406 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12407 /* The info or types section is assigned below to dwo_unit,
12408 there's no need to record it in dwo_file.
12409 Also, we can't simply record type sections in dwo_file because
12410 we record a pointer into the vector in dwo_unit. As we collect more
12411 types we'll grow the vector and eventually have to reallocate space
12412 for it, invalidating all copies of pointers into the previous
12414 *dwo_file_slot
= dwo_file
;
12418 if (dwarf_read_debug
)
12420 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12421 virtual_dwo_name
.c_str ());
12423 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12426 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12427 dwo_unit
->dwo_file
= dwo_file
;
12428 dwo_unit
->signature
= signature
;
12429 dwo_unit
->section
=
12430 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12431 *dwo_unit
->section
= sections
.info_or_types
;
12432 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12437 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
12438 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
12439 piece within that section used by a TU/CU, return a virtual section
12440 of just that piece. */
12442 static struct dwarf2_section_info
12443 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12444 struct dwarf2_section_info
*section
,
12445 bfd_size_type offset
, bfd_size_type size
)
12447 struct dwarf2_section_info result
;
12450 gdb_assert (section
!= NULL
);
12451 gdb_assert (!section
->is_virtual
);
12453 memset (&result
, 0, sizeof (result
));
12454 result
.s
.containing_section
= section
;
12455 result
.is_virtual
= 1;
12460 sectp
= get_section_bfd_section (section
);
12462 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
12463 bounds of the real section. This is a pretty-rare event, so just
12464 flag an error (easier) instead of a warning and trying to cope. */
12466 || offset
+ size
> bfd_get_section_size (sectp
))
12468 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
12469 " in section %s [in module %s]"),
12470 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
12471 objfile_name (dwarf2_per_objfile
->objfile
));
12474 result
.virtual_offset
= offset
;
12475 result
.size
= size
;
12479 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12480 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12481 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12482 This is for DWP version 2 files. */
12484 static struct dwo_unit
*
12485 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12486 struct dwp_file
*dwp_file
,
12487 uint32_t unit_index
,
12488 const char *comp_dir
,
12489 ULONGEST signature
, int is_debug_types
)
12491 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12492 const struct dwp_hash_table
*dwp_htab
=
12493 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12494 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12495 const char *kind
= is_debug_types
? "TU" : "CU";
12496 struct dwo_file
*dwo_file
;
12497 struct dwo_unit
*dwo_unit
;
12498 struct virtual_v2_dwo_sections sections
;
12499 void **dwo_file_slot
;
12502 gdb_assert (dwp_file
->version
== 2);
12504 if (dwarf_read_debug
)
12506 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
12508 pulongest (unit_index
), hex_string (signature
),
12512 /* Fetch the section offsets of this DWO unit. */
12514 memset (§ions
, 0, sizeof (sections
));
12516 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12518 uint32_t offset
= read_4_bytes (dbfd
,
12519 dwp_htab
->section_pool
.v2
.offsets
12520 + (((unit_index
- 1) * dwp_htab
->nr_columns
12522 * sizeof (uint32_t)));
12523 uint32_t size
= read_4_bytes (dbfd
,
12524 dwp_htab
->section_pool
.v2
.sizes
12525 + (((unit_index
- 1) * dwp_htab
->nr_columns
12527 * sizeof (uint32_t)));
12529 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12532 case DW_SECT_TYPES
:
12533 sections
.info_or_types_offset
= offset
;
12534 sections
.info_or_types_size
= size
;
12536 case DW_SECT_ABBREV
:
12537 sections
.abbrev_offset
= offset
;
12538 sections
.abbrev_size
= size
;
12541 sections
.line_offset
= offset
;
12542 sections
.line_size
= size
;
12545 sections
.loc_offset
= offset
;
12546 sections
.loc_size
= size
;
12548 case DW_SECT_STR_OFFSETS
:
12549 sections
.str_offsets_offset
= offset
;
12550 sections
.str_offsets_size
= size
;
12552 case DW_SECT_MACINFO
:
12553 sections
.macinfo_offset
= offset
;
12554 sections
.macinfo_size
= size
;
12556 case DW_SECT_MACRO
:
12557 sections
.macro_offset
= offset
;
12558 sections
.macro_size
= size
;
12563 /* It's easier for the rest of the code if we fake a struct dwo_file and
12564 have dwo_unit "live" in that. At least for now.
12566 The DWP file can be made up of a random collection of CUs and TUs.
12567 However, for each CU + set of TUs that came from the same original DWO
12568 file, we can combine them back into a virtual DWO file to save space
12569 (fewer struct dwo_file objects to allocate). Remember that for really
12570 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12572 std::string virtual_dwo_name
=
12573 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12574 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12575 (long) (sections
.line_size
? sections
.line_offset
: 0),
12576 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12577 (long) (sections
.str_offsets_size
12578 ? sections
.str_offsets_offset
: 0));
12579 /* Can we use an existing virtual DWO file? */
12580 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12581 virtual_dwo_name
.c_str (),
12583 /* Create one if necessary. */
12584 if (*dwo_file_slot
== NULL
)
12586 if (dwarf_read_debug
)
12588 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12589 virtual_dwo_name
.c_str ());
12591 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12593 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12594 virtual_dwo_name
.c_str (),
12595 virtual_dwo_name
.size ());
12596 dwo_file
->comp_dir
= comp_dir
;
12597 dwo_file
->sections
.abbrev
=
12598 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
12599 sections
.abbrev_offset
, sections
.abbrev_size
);
12600 dwo_file
->sections
.line
=
12601 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
12602 sections
.line_offset
, sections
.line_size
);
12603 dwo_file
->sections
.loc
=
12604 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12605 sections
.loc_offset
, sections
.loc_size
);
12606 dwo_file
->sections
.macinfo
=
12607 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12608 sections
.macinfo_offset
, sections
.macinfo_size
);
12609 dwo_file
->sections
.macro
=
12610 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12611 sections
.macro_offset
, sections
.macro_size
);
12612 dwo_file
->sections
.str_offsets
=
12613 create_dwp_v2_section (dwarf2_per_objfile
,
12614 &dwp_file
->sections
.str_offsets
,
12615 sections
.str_offsets_offset
,
12616 sections
.str_offsets_size
);
12617 /* The "str" section is global to the entire DWP file. */
12618 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12619 /* The info or types section is assigned below to dwo_unit,
12620 there's no need to record it in dwo_file.
12621 Also, we can't simply record type sections in dwo_file because
12622 we record a pointer into the vector in dwo_unit. As we collect more
12623 types we'll grow the vector and eventually have to reallocate space
12624 for it, invalidating all copies of pointers into the previous
12626 *dwo_file_slot
= dwo_file
;
12630 if (dwarf_read_debug
)
12632 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12633 virtual_dwo_name
.c_str ());
12635 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12638 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12639 dwo_unit
->dwo_file
= dwo_file
;
12640 dwo_unit
->signature
= signature
;
12641 dwo_unit
->section
=
12642 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12643 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12645 ? &dwp_file
->sections
.types
12646 : &dwp_file
->sections
.info
,
12647 sections
.info_or_types_offset
,
12648 sections
.info_or_types_size
);
12649 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12654 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12655 Returns NULL if the signature isn't found. */
12657 static struct dwo_unit
*
12658 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12659 struct dwp_file
*dwp_file
, const char *comp_dir
,
12660 ULONGEST signature
, int is_debug_types
)
12662 const struct dwp_hash_table
*dwp_htab
=
12663 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12664 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12665 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12666 uint32_t hash
= signature
& mask
;
12667 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12670 struct dwo_unit find_dwo_cu
;
12672 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12673 find_dwo_cu
.signature
= signature
;
12674 slot
= htab_find_slot (is_debug_types
12675 ? dwp_file
->loaded_tus
12676 : dwp_file
->loaded_cus
,
12677 &find_dwo_cu
, INSERT
);
12680 return (struct dwo_unit
*) *slot
;
12682 /* Use a for loop so that we don't loop forever on bad debug info. */
12683 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12685 ULONGEST signature_in_table
;
12687 signature_in_table
=
12688 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12689 if (signature_in_table
== signature
)
12691 uint32_t unit_index
=
12692 read_4_bytes (dbfd
,
12693 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12695 if (dwp_file
->version
== 1)
12697 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12698 dwp_file
, unit_index
,
12699 comp_dir
, signature
,
12704 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12705 dwp_file
, unit_index
,
12706 comp_dir
, signature
,
12709 return (struct dwo_unit
*) *slot
;
12711 if (signature_in_table
== 0)
12713 hash
= (hash
+ hash2
) & mask
;
12716 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12717 " [in module %s]"),
12721 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12722 Open the file specified by FILE_NAME and hand it off to BFD for
12723 preliminary analysis. Return a newly initialized bfd *, which
12724 includes a canonicalized copy of FILE_NAME.
12725 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12726 SEARCH_CWD is true if the current directory is to be searched.
12727 It will be searched before debug-file-directory.
12728 If successful, the file is added to the bfd include table of the
12729 objfile's bfd (see gdb_bfd_record_inclusion).
12730 If unable to find/open the file, return NULL.
12731 NOTE: This function is derived from symfile_bfd_open. */
12733 static gdb_bfd_ref_ptr
12734 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12735 const char *file_name
, int is_dwp
, int search_cwd
)
12738 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12739 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12740 to debug_file_directory. */
12741 const char *search_path
;
12742 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12744 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12747 if (*debug_file_directory
!= '\0')
12749 search_path_holder
.reset (concat (".", dirname_separator_string
,
12750 debug_file_directory
,
12752 search_path
= search_path_holder
.get ();
12758 search_path
= debug_file_directory
;
12760 openp_flags flags
= OPF_RETURN_REALPATH
;
12762 flags
|= OPF_SEARCH_IN_PATH
;
12764 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12765 desc
= openp (search_path
, flags
, file_name
,
12766 O_RDONLY
| O_BINARY
, &absolute_name
);
12770 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12772 if (sym_bfd
== NULL
)
12774 bfd_set_cacheable (sym_bfd
.get (), 1);
12776 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12779 /* Success. Record the bfd as having been included by the objfile's bfd.
12780 This is important because things like demangled_names_hash lives in the
12781 objfile's per_bfd space and may have references to things like symbol
12782 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12783 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12788 /* Try to open DWO file FILE_NAME.
12789 COMP_DIR is the DW_AT_comp_dir attribute.
12790 The result is the bfd handle of the file.
12791 If there is a problem finding or opening the file, return NULL.
12792 Upon success, the canonicalized path of the file is stored in the bfd,
12793 same as symfile_bfd_open. */
12795 static gdb_bfd_ref_ptr
12796 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12797 const char *file_name
, const char *comp_dir
)
12799 if (IS_ABSOLUTE_PATH (file_name
))
12800 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12801 0 /*is_dwp*/, 0 /*search_cwd*/);
12803 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12805 if (comp_dir
!= NULL
)
12807 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
12808 file_name
, (char *) NULL
);
12810 /* NOTE: If comp_dir is a relative path, this will also try the
12811 search path, which seems useful. */
12812 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12815 1 /*search_cwd*/));
12816 xfree (path_to_try
);
12821 /* That didn't work, try debug-file-directory, which, despite its name,
12822 is a list of paths. */
12824 if (*debug_file_directory
== '\0')
12827 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12828 0 /*is_dwp*/, 1 /*search_cwd*/);
12831 /* This function is mapped across the sections and remembers the offset and
12832 size of each of the DWO debugging sections we are interested in. */
12835 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12837 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12838 const struct dwop_section_names
*names
= &dwop_section_names
;
12840 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12842 dwo_sections
->abbrev
.s
.section
= sectp
;
12843 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12845 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12847 dwo_sections
->info
.s
.section
= sectp
;
12848 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
12850 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12852 dwo_sections
->line
.s
.section
= sectp
;
12853 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
12855 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12857 dwo_sections
->loc
.s
.section
= sectp
;
12858 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
12860 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12862 dwo_sections
->macinfo
.s
.section
= sectp
;
12863 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12865 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12867 dwo_sections
->macro
.s
.section
= sectp
;
12868 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
12870 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12872 dwo_sections
->str
.s
.section
= sectp
;
12873 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
12875 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12877 dwo_sections
->str_offsets
.s
.section
= sectp
;
12878 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12880 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12882 struct dwarf2_section_info type_section
;
12884 memset (&type_section
, 0, sizeof (type_section
));
12885 type_section
.s
.section
= sectp
;
12886 type_section
.size
= bfd_get_section_size (sectp
);
12887 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
12892 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12893 by PER_CU. This is for the non-DWP case.
12894 The result is NULL if DWO_NAME can't be found. */
12896 static struct dwo_file
*
12897 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12898 const char *dwo_name
, const char *comp_dir
)
12900 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12901 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12903 gdb_bfd_ref_ptr
dbfd (open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
));
12906 if (dwarf_read_debug
)
12907 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12911 /* We use a unique pointer here, despite the obstack allocation,
12912 because a dwo_file needs some cleanup if it is abandoned. */
12913 dwo_file_up
dwo_file (OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
12915 dwo_file
->dwo_name
= dwo_name
;
12916 dwo_file
->comp_dir
= comp_dir
;
12917 dwo_file
->dbfd
= dbfd
.release ();
12919 bfd_map_over_sections (dwo_file
->dbfd
, dwarf2_locate_dwo_sections
,
12920 &dwo_file
->sections
);
12922 create_cus_hash_table (dwarf2_per_objfile
, *dwo_file
, dwo_file
->sections
.info
,
12925 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
12926 dwo_file
->sections
.types
, dwo_file
->tus
);
12928 if (dwarf_read_debug
)
12929 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
12931 return dwo_file
.release ();
12934 /* This function is mapped across the sections and remembers the offset and
12935 size of each of the DWP debugging sections common to version 1 and 2 that
12936 we are interested in. */
12939 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12940 void *dwp_file_ptr
)
12942 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12943 const struct dwop_section_names
*names
= &dwop_section_names
;
12944 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12946 /* Record the ELF section number for later lookup: this is what the
12947 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12948 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12949 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12951 /* Look for specific sections that we need. */
12952 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12954 dwp_file
->sections
.str
.s
.section
= sectp
;
12955 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
12957 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12959 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12960 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
12962 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12964 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12965 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
12969 /* This function is mapped across the sections and remembers the offset and
12970 size of each of the DWP version 2 debugging sections that we are interested
12971 in. This is split into a separate function because we don't know if we
12972 have version 1 or 2 until we parse the cu_index/tu_index sections. */
12975 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12977 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12978 const struct dwop_section_names
*names
= &dwop_section_names
;
12979 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12981 /* Record the ELF section number for later lookup: this is what the
12982 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12983 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12984 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12986 /* Look for specific sections that we need. */
12987 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12989 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12990 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
12992 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12994 dwp_file
->sections
.info
.s
.section
= sectp
;
12995 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
12997 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12999 dwp_file
->sections
.line
.s
.section
= sectp
;
13000 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
13002 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
13004 dwp_file
->sections
.loc
.s
.section
= sectp
;
13005 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
13007 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
13009 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
13010 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
13012 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
13014 dwp_file
->sections
.macro
.s
.section
= sectp
;
13015 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
13017 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
13019 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
13020 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
13022 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
13024 dwp_file
->sections
.types
.s
.section
= sectp
;
13025 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
13029 /* Hash function for dwp_file loaded CUs/TUs. */
13032 hash_dwp_loaded_cutus (const void *item
)
13034 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
13036 /* This drops the top 32 bits of the signature, but is ok for a hash. */
13037 return dwo_unit
->signature
;
13040 /* Equality function for dwp_file loaded CUs/TUs. */
13043 eq_dwp_loaded_cutus (const void *a
, const void *b
)
13045 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
13046 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
13048 return dua
->signature
== dub
->signature
;
13051 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
13054 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
13056 return htab_create_alloc_ex (3,
13057 hash_dwp_loaded_cutus
,
13058 eq_dwp_loaded_cutus
,
13060 &objfile
->objfile_obstack
,
13061 hashtab_obstack_allocate
,
13062 dummy_obstack_deallocate
);
13065 /* Try to open DWP file FILE_NAME.
13066 The result is the bfd handle of the file.
13067 If there is a problem finding or opening the file, return NULL.
13068 Upon success, the canonicalized path of the file is stored in the bfd,
13069 same as symfile_bfd_open. */
13071 static gdb_bfd_ref_ptr
13072 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
13073 const char *file_name
)
13075 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
13077 1 /*search_cwd*/));
13081 /* Work around upstream bug 15652.
13082 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
13083 [Whether that's a "bug" is debatable, but it is getting in our way.]
13084 We have no real idea where the dwp file is, because gdb's realpath-ing
13085 of the executable's path may have discarded the needed info.
13086 [IWBN if the dwp file name was recorded in the executable, akin to
13087 .gnu_debuglink, but that doesn't exist yet.]
13088 Strip the directory from FILE_NAME and search again. */
13089 if (*debug_file_directory
!= '\0')
13091 /* Don't implicitly search the current directory here.
13092 If the user wants to search "." to handle this case,
13093 it must be added to debug-file-directory. */
13094 return try_open_dwop_file (dwarf2_per_objfile
,
13095 lbasename (file_name
), 1 /*is_dwp*/,
13102 /* Initialize the use of the DWP file for the current objfile.
13103 By convention the name of the DWP file is ${objfile}.dwp.
13104 The result is NULL if it can't be found. */
13106 static std::unique_ptr
<struct dwp_file
>
13107 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13109 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13111 /* Try to find first .dwp for the binary file before any symbolic links
13114 /* If the objfile is a debug file, find the name of the real binary
13115 file and get the name of dwp file from there. */
13116 std::string dwp_name
;
13117 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
13119 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
13120 const char *backlink_basename
= lbasename (backlink
->original_name
);
13122 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
13125 dwp_name
= objfile
->original_name
;
13127 dwp_name
+= ".dwp";
13129 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
13131 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
13133 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
13134 dwp_name
= objfile_name (objfile
);
13135 dwp_name
+= ".dwp";
13136 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
13141 if (dwarf_read_debug
)
13142 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
13143 return std::unique_ptr
<dwp_file
> ();
13146 const char *name
= bfd_get_filename (dbfd
.get ());
13147 std::unique_ptr
<struct dwp_file
> dwp_file
13148 (new struct dwp_file (name
, std::move (dbfd
)));
13150 /* +1: section 0 is unused */
13151 dwp_file
->num_sections
= bfd_count_sections (dwp_file
->dbfd
) + 1;
13152 dwp_file
->elf_sections
=
13153 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
13154 dwp_file
->num_sections
, asection
*);
13156 bfd_map_over_sections (dwp_file
->dbfd
.get (),
13157 dwarf2_locate_common_dwp_sections
,
13160 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
13163 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
13166 /* The DWP file version is stored in the hash table. Oh well. */
13167 if (dwp_file
->cus
&& dwp_file
->tus
13168 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
13170 /* Technically speaking, we should try to limp along, but this is
13171 pretty bizarre. We use pulongest here because that's the established
13172 portability solution (e.g, we cannot use %u for uint32_t). */
13173 error (_("Dwarf Error: DWP file CU version %s doesn't match"
13174 " TU version %s [in DWP file %s]"),
13175 pulongest (dwp_file
->cus
->version
),
13176 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
13180 dwp_file
->version
= dwp_file
->cus
->version
;
13181 else if (dwp_file
->tus
)
13182 dwp_file
->version
= dwp_file
->tus
->version
;
13184 dwp_file
->version
= 2;
13186 if (dwp_file
->version
== 2)
13187 bfd_map_over_sections (dwp_file
->dbfd
.get (),
13188 dwarf2_locate_v2_dwp_sections
,
13191 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
13192 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
13194 if (dwarf_read_debug
)
13196 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
13197 fprintf_unfiltered (gdb_stdlog
,
13198 " %s CUs, %s TUs\n",
13199 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
13200 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
13206 /* Wrapper around open_and_init_dwp_file, only open it once. */
13208 static struct dwp_file
*
13209 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13211 if (! dwarf2_per_objfile
->dwp_checked
)
13213 dwarf2_per_objfile
->dwp_file
13214 = open_and_init_dwp_file (dwarf2_per_objfile
);
13215 dwarf2_per_objfile
->dwp_checked
= 1;
13217 return dwarf2_per_objfile
->dwp_file
.get ();
13220 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
13221 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
13222 or in the DWP file for the objfile, referenced by THIS_UNIT.
13223 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
13224 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
13226 This is called, for example, when wanting to read a variable with a
13227 complex location. Therefore we don't want to do file i/o for every call.
13228 Therefore we don't want to look for a DWO file on every call.
13229 Therefore we first see if we've already seen SIGNATURE in a DWP file,
13230 then we check if we've already seen DWO_NAME, and only THEN do we check
13233 The result is a pointer to the dwo_unit object or NULL if we didn't find it
13234 (dwo_id mismatch or couldn't find the DWO/DWP file). */
13236 static struct dwo_unit
*
13237 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
13238 const char *dwo_name
, const char *comp_dir
,
13239 ULONGEST signature
, int is_debug_types
)
13241 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
13242 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13243 const char *kind
= is_debug_types
? "TU" : "CU";
13244 void **dwo_file_slot
;
13245 struct dwo_file
*dwo_file
;
13246 struct dwp_file
*dwp_file
;
13248 /* First see if there's a DWP file.
13249 If we have a DWP file but didn't find the DWO inside it, don't
13250 look for the original DWO file. It makes gdb behave differently
13251 depending on whether one is debugging in the build tree. */
13253 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
13254 if (dwp_file
!= NULL
)
13256 const struct dwp_hash_table
*dwp_htab
=
13257 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
13259 if (dwp_htab
!= NULL
)
13261 struct dwo_unit
*dwo_cutu
=
13262 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
13263 signature
, is_debug_types
);
13265 if (dwo_cutu
!= NULL
)
13267 if (dwarf_read_debug
)
13269 fprintf_unfiltered (gdb_stdlog
,
13270 "Virtual DWO %s %s found: @%s\n",
13271 kind
, hex_string (signature
),
13272 host_address_to_string (dwo_cutu
));
13280 /* No DWP file, look for the DWO file. */
13282 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
13283 dwo_name
, comp_dir
);
13284 if (*dwo_file_slot
== NULL
)
13286 /* Read in the file and build a table of the CUs/TUs it contains. */
13287 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
13289 /* NOTE: This will be NULL if unable to open the file. */
13290 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
13292 if (dwo_file
!= NULL
)
13294 struct dwo_unit
*dwo_cutu
= NULL
;
13296 if (is_debug_types
&& dwo_file
->tus
)
13298 struct dwo_unit find_dwo_cutu
;
13300 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13301 find_dwo_cutu
.signature
= signature
;
13303 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
13305 else if (!is_debug_types
&& dwo_file
->cus
)
13307 struct dwo_unit find_dwo_cutu
;
13309 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13310 find_dwo_cutu
.signature
= signature
;
13311 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
13315 if (dwo_cutu
!= NULL
)
13317 if (dwarf_read_debug
)
13319 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
13320 kind
, dwo_name
, hex_string (signature
),
13321 host_address_to_string (dwo_cutu
));
13328 /* We didn't find it. This could mean a dwo_id mismatch, or
13329 someone deleted the DWO/DWP file, or the search path isn't set up
13330 correctly to find the file. */
13332 if (dwarf_read_debug
)
13334 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
13335 kind
, dwo_name
, hex_string (signature
));
13338 /* This is a warning and not a complaint because it can be caused by
13339 pilot error (e.g., user accidentally deleting the DWO). */
13341 /* Print the name of the DWP file if we looked there, helps the user
13342 better diagnose the problem. */
13343 std::string dwp_text
;
13345 if (dwp_file
!= NULL
)
13346 dwp_text
= string_printf (" [in DWP file %s]",
13347 lbasename (dwp_file
->name
));
13349 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
13350 " [in module %s]"),
13351 kind
, dwo_name
, hex_string (signature
),
13353 this_unit
->is_debug_types
? "TU" : "CU",
13354 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
13359 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
13360 See lookup_dwo_cutu_unit for details. */
13362 static struct dwo_unit
*
13363 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
13364 const char *dwo_name
, const char *comp_dir
,
13365 ULONGEST signature
)
13367 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
13370 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
13371 See lookup_dwo_cutu_unit for details. */
13373 static struct dwo_unit
*
13374 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
13375 const char *dwo_name
, const char *comp_dir
)
13377 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
13380 /* Traversal function for queue_and_load_all_dwo_tus. */
13383 queue_and_load_dwo_tu (void **slot
, void *info
)
13385 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
13386 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
13387 ULONGEST signature
= dwo_unit
->signature
;
13388 struct signatured_type
*sig_type
=
13389 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
13391 if (sig_type
!= NULL
)
13393 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
13395 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
13396 a real dependency of PER_CU on SIG_TYPE. That is detected later
13397 while processing PER_CU. */
13398 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
13399 load_full_type_unit (sig_cu
);
13400 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
13406 /* Queue all TUs contained in the DWO of PER_CU to be read in.
13407 The DWO may have the only definition of the type, though it may not be
13408 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
13409 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
13412 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
13414 struct dwo_unit
*dwo_unit
;
13415 struct dwo_file
*dwo_file
;
13417 gdb_assert (!per_cu
->is_debug_types
);
13418 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
13419 gdb_assert (per_cu
->cu
!= NULL
);
13421 dwo_unit
= per_cu
->cu
->dwo_unit
;
13422 gdb_assert (dwo_unit
!= NULL
);
13424 dwo_file
= dwo_unit
->dwo_file
;
13425 if (dwo_file
->tus
!= NULL
)
13426 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
13429 /* Free all resources associated with DWO_FILE.
13430 Close the DWO file and munmap the sections. */
13433 free_dwo_file (struct dwo_file
*dwo_file
)
13435 /* Note: dbfd is NULL for virtual DWO files. */
13436 gdb_bfd_unref (dwo_file
->dbfd
);
13438 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
13441 /* Traversal function for free_dwo_files. */
13444 free_dwo_file_from_slot (void **slot
, void *info
)
13446 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
13448 free_dwo_file (dwo_file
);
13453 /* Free all resources associated with DWO_FILES. */
13456 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
13458 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
13461 /* Read in various DIEs. */
13463 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
13464 Inherit only the children of the DW_AT_abstract_origin DIE not being
13465 already referenced by DW_AT_abstract_origin from the children of the
13469 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
13471 struct die_info
*child_die
;
13472 sect_offset
*offsetp
;
13473 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
13474 struct die_info
*origin_die
;
13475 /* Iterator of the ORIGIN_DIE children. */
13476 struct die_info
*origin_child_die
;
13477 struct attribute
*attr
;
13478 struct dwarf2_cu
*origin_cu
;
13479 struct pending
**origin_previous_list_in_scope
;
13481 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13485 /* Note that following die references may follow to a die in a
13489 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
13491 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
13493 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
13494 origin_cu
->list_in_scope
= cu
->list_in_scope
;
13496 if (die
->tag
!= origin_die
->tag
13497 && !(die
->tag
== DW_TAG_inlined_subroutine
13498 && origin_die
->tag
== DW_TAG_subprogram
))
13499 complaint (&symfile_complaints
,
13500 _("DIE %s and its abstract origin %s have different tags"),
13501 sect_offset_str (die
->sect_off
),
13502 sect_offset_str (origin_die
->sect_off
));
13504 std::vector
<sect_offset
> offsets
;
13506 for (child_die
= die
->child
;
13507 child_die
&& child_die
->tag
;
13508 child_die
= sibling_die (child_die
))
13510 struct die_info
*child_origin_die
;
13511 struct dwarf2_cu
*child_origin_cu
;
13513 /* We are trying to process concrete instance entries:
13514 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
13515 it's not relevant to our analysis here. i.e. detecting DIEs that are
13516 present in the abstract instance but not referenced in the concrete
13518 if (child_die
->tag
== DW_TAG_call_site
13519 || child_die
->tag
== DW_TAG_GNU_call_site
)
13522 /* For each CHILD_DIE, find the corresponding child of
13523 ORIGIN_DIE. If there is more than one layer of
13524 DW_AT_abstract_origin, follow them all; there shouldn't be,
13525 but GCC versions at least through 4.4 generate this (GCC PR
13527 child_origin_die
= child_die
;
13528 child_origin_cu
= cu
;
13531 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
13535 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
13539 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
13540 counterpart may exist. */
13541 if (child_origin_die
!= child_die
)
13543 if (child_die
->tag
!= child_origin_die
->tag
13544 && !(child_die
->tag
== DW_TAG_inlined_subroutine
13545 && child_origin_die
->tag
== DW_TAG_subprogram
))
13546 complaint (&symfile_complaints
,
13547 _("Child DIE %s and its abstract origin %s have "
13549 sect_offset_str (child_die
->sect_off
),
13550 sect_offset_str (child_origin_die
->sect_off
));
13551 if (child_origin_die
->parent
!= origin_die
)
13552 complaint (&symfile_complaints
,
13553 _("Child DIE %s and its abstract origin %s have "
13554 "different parents"),
13555 sect_offset_str (child_die
->sect_off
),
13556 sect_offset_str (child_origin_die
->sect_off
));
13558 offsets
.push_back (child_origin_die
->sect_off
);
13561 std::sort (offsets
.begin (), offsets
.end ());
13562 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
13563 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
13564 if (offsetp
[-1] == *offsetp
)
13565 complaint (&symfile_complaints
,
13566 _("Multiple children of DIE %s refer "
13567 "to DIE %s as their abstract origin"),
13568 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
13570 offsetp
= offsets
.data ();
13571 origin_child_die
= origin_die
->child
;
13572 while (origin_child_die
&& origin_child_die
->tag
)
13574 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13575 while (offsetp
< offsets_end
13576 && *offsetp
< origin_child_die
->sect_off
)
13578 if (offsetp
>= offsets_end
13579 || *offsetp
> origin_child_die
->sect_off
)
13581 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13582 Check whether we're already processing ORIGIN_CHILD_DIE.
13583 This can happen with mutually referenced abstract_origins.
13585 if (!origin_child_die
->in_process
)
13586 process_die (origin_child_die
, origin_cu
);
13588 origin_child_die
= sibling_die (origin_child_die
);
13590 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13594 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13596 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13597 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13598 struct context_stack
*newobj
;
13601 struct die_info
*child_die
;
13602 struct attribute
*attr
, *call_line
, *call_file
;
13604 CORE_ADDR baseaddr
;
13605 struct block
*block
;
13606 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13607 std::vector
<struct symbol
*> template_args
;
13608 struct template_symbol
*templ_func
= NULL
;
13612 /* If we do not have call site information, we can't show the
13613 caller of this inlined function. That's too confusing, so
13614 only use the scope for local variables. */
13615 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13616 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13617 if (call_line
== NULL
|| call_file
== NULL
)
13619 read_lexical_block_scope (die
, cu
);
13624 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13626 name
= dwarf2_name (die
, cu
);
13628 /* Ignore functions with missing or empty names. These are actually
13629 illegal according to the DWARF standard. */
13632 complaint (&symfile_complaints
,
13633 _("missing name for subprogram DIE at %s"),
13634 sect_offset_str (die
->sect_off
));
13638 /* Ignore functions with missing or invalid low and high pc attributes. */
13639 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13640 <= PC_BOUNDS_INVALID
)
13642 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13643 if (!attr
|| !DW_UNSND (attr
))
13644 complaint (&symfile_complaints
,
13645 _("cannot get low and high bounds "
13646 "for subprogram DIE at %s"),
13647 sect_offset_str (die
->sect_off
));
13651 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13652 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13654 /* If we have any template arguments, then we must allocate a
13655 different sort of symbol. */
13656 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
13658 if (child_die
->tag
== DW_TAG_template_type_param
13659 || child_die
->tag
== DW_TAG_template_value_param
)
13661 templ_func
= allocate_template_symbol (objfile
);
13662 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13667 newobj
= push_context (0, lowpc
);
13668 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13669 (struct symbol
*) templ_func
);
13671 /* If there is a location expression for DW_AT_frame_base, record
13673 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13675 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13677 /* If there is a location for the static link, record it. */
13678 newobj
->static_link
= NULL
;
13679 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13682 newobj
->static_link
13683 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13684 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
13687 cu
->list_in_scope
= &local_symbols
;
13689 if (die
->child
!= NULL
)
13691 child_die
= die
->child
;
13692 while (child_die
&& child_die
->tag
)
13694 if (child_die
->tag
== DW_TAG_template_type_param
13695 || child_die
->tag
== DW_TAG_template_value_param
)
13697 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13700 template_args
.push_back (arg
);
13703 process_die (child_die
, cu
);
13704 child_die
= sibling_die (child_die
);
13708 inherit_abstract_dies (die
, cu
);
13710 /* If we have a DW_AT_specification, we might need to import using
13711 directives from the context of the specification DIE. See the
13712 comment in determine_prefix. */
13713 if (cu
->language
== language_cplus
13714 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13716 struct dwarf2_cu
*spec_cu
= cu
;
13717 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13721 child_die
= spec_die
->child
;
13722 while (child_die
&& child_die
->tag
)
13724 if (child_die
->tag
== DW_TAG_imported_module
)
13725 process_die (child_die
, spec_cu
);
13726 child_die
= sibling_die (child_die
);
13729 /* In some cases, GCC generates specification DIEs that
13730 themselves contain DW_AT_specification attributes. */
13731 spec_die
= die_specification (spec_die
, &spec_cu
);
13735 newobj
= pop_context ();
13736 /* Make a block for the local symbols within. */
13737 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
13738 newobj
->static_link
, lowpc
, highpc
);
13740 /* For C++, set the block's scope. */
13741 if ((cu
->language
== language_cplus
13742 || cu
->language
== language_fortran
13743 || cu
->language
== language_d
13744 || cu
->language
== language_rust
)
13745 && cu
->processing_has_namespace_info
)
13746 block_set_scope (block
, determine_prefix (die
, cu
),
13747 &objfile
->objfile_obstack
);
13749 /* If we have address ranges, record them. */
13750 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13752 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
13754 /* Attach template arguments to function. */
13755 if (!template_args
.empty ())
13757 gdb_assert (templ_func
!= NULL
);
13759 templ_func
->n_template_arguments
= template_args
.size ();
13760 templ_func
->template_arguments
13761 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13762 templ_func
->n_template_arguments
);
13763 memcpy (templ_func
->template_arguments
,
13764 template_args
.data (),
13765 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13768 /* In C++, we can have functions nested inside functions (e.g., when
13769 a function declares a class that has methods). This means that
13770 when we finish processing a function scope, we may need to go
13771 back to building a containing block's symbol lists. */
13772 local_symbols
= newobj
->locals
;
13773 local_using_directives
= newobj
->local_using_directives
;
13775 /* If we've finished processing a top-level function, subsequent
13776 symbols go in the file symbol list. */
13777 if (outermost_context_p ())
13778 cu
->list_in_scope
= &file_symbols
;
13781 /* Process all the DIES contained within a lexical block scope. Start
13782 a new scope, process the dies, and then close the scope. */
13785 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13787 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13788 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13789 struct context_stack
*newobj
;
13790 CORE_ADDR lowpc
, highpc
;
13791 struct die_info
*child_die
;
13792 CORE_ADDR baseaddr
;
13794 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13796 /* Ignore blocks with missing or invalid low and high pc attributes. */
13797 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13798 as multiple lexical blocks? Handling children in a sane way would
13799 be nasty. Might be easier to properly extend generic blocks to
13800 describe ranges. */
13801 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13803 case PC_BOUNDS_NOT_PRESENT
:
13804 /* DW_TAG_lexical_block has no attributes, process its children as if
13805 there was no wrapping by that DW_TAG_lexical_block.
13806 GCC does no longer produces such DWARF since GCC r224161. */
13807 for (child_die
= die
->child
;
13808 child_die
!= NULL
&& child_die
->tag
;
13809 child_die
= sibling_die (child_die
))
13810 process_die (child_die
, cu
);
13812 case PC_BOUNDS_INVALID
:
13815 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13816 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13818 push_context (0, lowpc
);
13819 if (die
->child
!= NULL
)
13821 child_die
= die
->child
;
13822 while (child_die
&& child_die
->tag
)
13824 process_die (child_die
, cu
);
13825 child_die
= sibling_die (child_die
);
13828 inherit_abstract_dies (die
, cu
);
13829 newobj
= pop_context ();
13831 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
13833 struct block
*block
13834 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
13835 newobj
->start_addr
, highpc
);
13837 /* Note that recording ranges after traversing children, as we
13838 do here, means that recording a parent's ranges entails
13839 walking across all its children's ranges as they appear in
13840 the address map, which is quadratic behavior.
13842 It would be nicer to record the parent's ranges before
13843 traversing its children, simply overriding whatever you find
13844 there. But since we don't even decide whether to create a
13845 block until after we've traversed its children, that's hard
13847 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13849 local_symbols
= newobj
->locals
;
13850 local_using_directives
= newobj
->local_using_directives
;
13853 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13856 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13858 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13859 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13860 CORE_ADDR pc
, baseaddr
;
13861 struct attribute
*attr
;
13862 struct call_site
*call_site
, call_site_local
;
13865 struct die_info
*child_die
;
13867 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13869 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13872 /* This was a pre-DWARF-5 GNU extension alias
13873 for DW_AT_call_return_pc. */
13874 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13878 complaint (&symfile_complaints
,
13879 _("missing DW_AT_call_return_pc for DW_TAG_call_site "
13880 "DIE %s [in module %s]"),
13881 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13884 pc
= attr_value_as_address (attr
) + baseaddr
;
13885 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13887 if (cu
->call_site_htab
== NULL
)
13888 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13889 NULL
, &objfile
->objfile_obstack
,
13890 hashtab_obstack_allocate
, NULL
);
13891 call_site_local
.pc
= pc
;
13892 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13895 complaint (&symfile_complaints
,
13896 _("Duplicate PC %s for DW_TAG_call_site "
13897 "DIE %s [in module %s]"),
13898 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13899 objfile_name (objfile
));
13903 /* Count parameters at the caller. */
13906 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13907 child_die
= sibling_die (child_die
))
13909 if (child_die
->tag
!= DW_TAG_call_site_parameter
13910 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13912 complaint (&symfile_complaints
,
13913 _("Tag %d is not DW_TAG_call_site_parameter in "
13914 "DW_TAG_call_site child DIE %s [in module %s]"),
13915 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13916 objfile_name (objfile
));
13924 = ((struct call_site
*)
13925 obstack_alloc (&objfile
->objfile_obstack
,
13926 sizeof (*call_site
)
13927 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13929 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13930 call_site
->pc
= pc
;
13932 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13933 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13935 struct die_info
*func_die
;
13937 /* Skip also over DW_TAG_inlined_subroutine. */
13938 for (func_die
= die
->parent
;
13939 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13940 && func_die
->tag
!= DW_TAG_subroutine_type
;
13941 func_die
= func_die
->parent
);
13943 /* DW_AT_call_all_calls is a superset
13944 of DW_AT_call_all_tail_calls. */
13946 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13947 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13948 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13949 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13951 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13952 not complete. But keep CALL_SITE for look ups via call_site_htab,
13953 both the initial caller containing the real return address PC and
13954 the final callee containing the current PC of a chain of tail
13955 calls do not need to have the tail call list complete. But any
13956 function candidate for a virtual tail call frame searched via
13957 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13958 determined unambiguously. */
13962 struct type
*func_type
= NULL
;
13965 func_type
= get_die_type (func_die
, cu
);
13966 if (func_type
!= NULL
)
13968 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
13970 /* Enlist this call site to the function. */
13971 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13972 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13975 complaint (&symfile_complaints
,
13976 _("Cannot find function owning DW_TAG_call_site "
13977 "DIE %s [in module %s]"),
13978 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13982 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13984 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13986 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13989 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13990 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13992 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
13993 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
13994 /* Keep NULL DWARF_BLOCK. */;
13995 else if (attr_form_is_block (attr
))
13997 struct dwarf2_locexpr_baton
*dlbaton
;
13999 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
14000 dlbaton
->data
= DW_BLOCK (attr
)->data
;
14001 dlbaton
->size
= DW_BLOCK (attr
)->size
;
14002 dlbaton
->per_cu
= cu
->per_cu
;
14004 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
14006 else if (attr_form_is_ref (attr
))
14008 struct dwarf2_cu
*target_cu
= cu
;
14009 struct die_info
*target_die
;
14011 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14012 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
14013 if (die_is_declaration (target_die
, target_cu
))
14015 const char *target_physname
;
14017 /* Prefer the mangled name; otherwise compute the demangled one. */
14018 target_physname
= dw2_linkage_name (target_die
, target_cu
);
14019 if (target_physname
== NULL
)
14020 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
14021 if (target_physname
== NULL
)
14022 complaint (&symfile_complaints
,
14023 _("DW_AT_call_target target DIE has invalid "
14024 "physname, for referencing DIE %s [in module %s]"),
14025 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14027 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
14033 /* DW_AT_entry_pc should be preferred. */
14034 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
14035 <= PC_BOUNDS_INVALID
)
14036 complaint (&symfile_complaints
,
14037 _("DW_AT_call_target target DIE has invalid "
14038 "low pc, for referencing DIE %s [in module %s]"),
14039 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14042 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
14043 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
14048 complaint (&symfile_complaints
,
14049 _("DW_TAG_call_site DW_AT_call_target is neither "
14050 "block nor reference, for DIE %s [in module %s]"),
14051 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14053 call_site
->per_cu
= cu
->per_cu
;
14055 for (child_die
= die
->child
;
14056 child_die
&& child_die
->tag
;
14057 child_die
= sibling_die (child_die
))
14059 struct call_site_parameter
*parameter
;
14060 struct attribute
*loc
, *origin
;
14062 if (child_die
->tag
!= DW_TAG_call_site_parameter
14063 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14065 /* Already printed the complaint above. */
14069 gdb_assert (call_site
->parameter_count
< nparams
);
14070 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
14072 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
14073 specifies DW_TAG_formal_parameter. Value of the data assumed for the
14074 register is contained in DW_AT_call_value. */
14076 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
14077 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
14078 if (origin
== NULL
)
14080 /* This was a pre-DWARF-5 GNU extension alias
14081 for DW_AT_call_parameter. */
14082 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
14084 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
14086 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
14088 sect_offset sect_off
14089 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
14090 if (!offset_in_cu_p (&cu
->header
, sect_off
))
14092 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
14093 binding can be done only inside one CU. Such referenced DIE
14094 therefore cannot be even moved to DW_TAG_partial_unit. */
14095 complaint (&symfile_complaints
,
14096 _("DW_AT_call_parameter offset is not in CU for "
14097 "DW_TAG_call_site child DIE %s [in module %s]"),
14098 sect_offset_str (child_die
->sect_off
),
14099 objfile_name (objfile
));
14102 parameter
->u
.param_cu_off
14103 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
14105 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
14107 complaint (&symfile_complaints
,
14108 _("No DW_FORM_block* DW_AT_location for "
14109 "DW_TAG_call_site child DIE %s [in module %s]"),
14110 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
14115 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
14116 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
14117 if (parameter
->u
.dwarf_reg
!= -1)
14118 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
14119 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
14120 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
14121 ¶meter
->u
.fb_offset
))
14122 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
14125 complaint (&symfile_complaints
,
14126 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
14127 "for DW_FORM_block* DW_AT_location is supported for "
14128 "DW_TAG_call_site child DIE %s "
14130 sect_offset_str (child_die
->sect_off
),
14131 objfile_name (objfile
));
14136 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
14138 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
14139 if (!attr_form_is_block (attr
))
14141 complaint (&symfile_complaints
,
14142 _("No DW_FORM_block* DW_AT_call_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
->value
= DW_BLOCK (attr
)->data
;
14149 parameter
->value_size
= DW_BLOCK (attr
)->size
;
14151 /* Parameters are not pre-cleared by memset above. */
14152 parameter
->data_value
= NULL
;
14153 parameter
->data_value_size
= 0;
14154 call_site
->parameter_count
++;
14156 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
14158 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
14161 if (!attr_form_is_block (attr
))
14162 complaint (&symfile_complaints
,
14163 _("No DW_FORM_block* DW_AT_call_data_value for "
14164 "DW_TAG_call_site child DIE %s [in module %s]"),
14165 sect_offset_str (child_die
->sect_off
),
14166 objfile_name (objfile
));
14169 parameter
->data_value
= DW_BLOCK (attr
)->data
;
14170 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
14176 /* Helper function for read_variable. If DIE represents a virtual
14177 table, then return the type of the concrete object that is
14178 associated with the virtual table. Otherwise, return NULL. */
14180 static struct type
*
14181 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14183 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14187 /* Find the type DIE. */
14188 struct die_info
*type_die
= NULL
;
14189 struct dwarf2_cu
*type_cu
= cu
;
14191 if (attr_form_is_ref (attr
))
14192 type_die
= follow_die_ref (die
, attr
, &type_cu
);
14193 if (type_die
== NULL
)
14196 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
14198 return die_containing_type (type_die
, type_cu
);
14201 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
14204 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
14206 struct rust_vtable_symbol
*storage
= NULL
;
14208 if (cu
->language
== language_rust
)
14210 struct type
*containing_type
= rust_containing_type (die
, cu
);
14212 if (containing_type
!= NULL
)
14214 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14216 storage
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
14217 struct rust_vtable_symbol
);
14218 initialize_objfile_symbol (storage
);
14219 storage
->concrete_type
= containing_type
;
14220 storage
->subclass
= SYMBOL_RUST_VTABLE
;
14224 new_symbol (die
, NULL
, cu
, storage
);
14227 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
14228 reading .debug_rnglists.
14229 Callback's type should be:
14230 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14231 Return true if the attributes are present and valid, otherwise,
14234 template <typename Callback
>
14236 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
14237 Callback
&&callback
)
14239 struct dwarf2_per_objfile
*dwarf2_per_objfile
14240 = cu
->per_cu
->dwarf2_per_objfile
;
14241 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14242 bfd
*obfd
= objfile
->obfd
;
14243 /* Base address selection entry. */
14246 const gdb_byte
*buffer
;
14247 CORE_ADDR baseaddr
;
14248 bool overflow
= false;
14250 found_base
= cu
->base_known
;
14251 base
= cu
->base_address
;
14253 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
14254 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
14256 complaint (&symfile_complaints
,
14257 _("Offset %d out of bounds for DW_AT_ranges attribute"),
14261 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
14263 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14267 /* Initialize it due to a false compiler warning. */
14268 CORE_ADDR range_beginning
= 0, range_end
= 0;
14269 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
14270 + dwarf2_per_objfile
->rnglists
.size
);
14271 unsigned int bytes_read
;
14273 if (buffer
== buf_end
)
14278 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
14281 case DW_RLE_end_of_list
:
14283 case DW_RLE_base_address
:
14284 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14289 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14291 buffer
+= bytes_read
;
14293 case DW_RLE_start_length
:
14294 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14299 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14300 buffer
+= bytes_read
;
14301 range_end
= (range_beginning
14302 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
14303 buffer
+= bytes_read
;
14304 if (buffer
> buf_end
)
14310 case DW_RLE_offset_pair
:
14311 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14312 buffer
+= bytes_read
;
14313 if (buffer
> buf_end
)
14318 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14319 buffer
+= bytes_read
;
14320 if (buffer
> buf_end
)
14326 case DW_RLE_start_end
:
14327 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
14332 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14333 buffer
+= bytes_read
;
14334 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14335 buffer
+= bytes_read
;
14338 complaint (&symfile_complaints
,
14339 _("Invalid .debug_rnglists data (no base address)"));
14342 if (rlet
== DW_RLE_end_of_list
|| overflow
)
14344 if (rlet
== DW_RLE_base_address
)
14349 /* We have no valid base address for the ranges
14351 complaint (&symfile_complaints
,
14352 _("Invalid .debug_rnglists data (no base address)"));
14356 if (range_beginning
> range_end
)
14358 /* Inverted range entries are invalid. */
14359 complaint (&symfile_complaints
,
14360 _("Invalid .debug_rnglists data (inverted range)"));
14364 /* Empty range entries have no effect. */
14365 if (range_beginning
== range_end
)
14368 range_beginning
+= base
;
14371 /* A not-uncommon case of bad debug info.
14372 Don't pollute the addrmap with bad data. */
14373 if (range_beginning
+ baseaddr
== 0
14374 && !dwarf2_per_objfile
->has_section_at_zero
)
14376 complaint (&symfile_complaints
,
14377 _(".debug_rnglists entry has start address of zero"
14378 " [in module %s]"), objfile_name (objfile
));
14382 callback (range_beginning
, range_end
);
14387 complaint (&symfile_complaints
,
14388 _("Offset %d is not terminated "
14389 "for DW_AT_ranges attribute"),
14397 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
14398 Callback's type should be:
14399 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14400 Return 1 if the attributes are present and valid, otherwise, return 0. */
14402 template <typename Callback
>
14404 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
14405 Callback
&&callback
)
14407 struct dwarf2_per_objfile
*dwarf2_per_objfile
14408 = cu
->per_cu
->dwarf2_per_objfile
;
14409 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14410 struct comp_unit_head
*cu_header
= &cu
->header
;
14411 bfd
*obfd
= objfile
->obfd
;
14412 unsigned int addr_size
= cu_header
->addr_size
;
14413 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14414 /* Base address selection entry. */
14417 unsigned int dummy
;
14418 const gdb_byte
*buffer
;
14419 CORE_ADDR baseaddr
;
14421 if (cu_header
->version
>= 5)
14422 return dwarf2_rnglists_process (offset
, cu
, callback
);
14424 found_base
= cu
->base_known
;
14425 base
= cu
->base_address
;
14427 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
14428 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
14430 complaint (&symfile_complaints
,
14431 _("Offset %d out of bounds for DW_AT_ranges attribute"),
14435 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
14437 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14441 CORE_ADDR range_beginning
, range_end
;
14443 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
14444 buffer
+= addr_size
;
14445 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
14446 buffer
+= addr_size
;
14447 offset
+= 2 * addr_size
;
14449 /* An end of list marker is a pair of zero addresses. */
14450 if (range_beginning
== 0 && range_end
== 0)
14451 /* Found the end of list entry. */
14454 /* Each base address selection entry is a pair of 2 values.
14455 The first is the largest possible address, the second is
14456 the base address. Check for a base address here. */
14457 if ((range_beginning
& mask
) == mask
)
14459 /* If we found the largest possible address, then we already
14460 have the base address in range_end. */
14468 /* We have no valid base address for the ranges
14470 complaint (&symfile_complaints
,
14471 _("Invalid .debug_ranges data (no base address)"));
14475 if (range_beginning
> range_end
)
14477 /* Inverted range entries are invalid. */
14478 complaint (&symfile_complaints
,
14479 _("Invalid .debug_ranges data (inverted range)"));
14483 /* Empty range entries have no effect. */
14484 if (range_beginning
== range_end
)
14487 range_beginning
+= base
;
14490 /* A not-uncommon case of bad debug info.
14491 Don't pollute the addrmap with bad data. */
14492 if (range_beginning
+ baseaddr
== 0
14493 && !dwarf2_per_objfile
->has_section_at_zero
)
14495 complaint (&symfile_complaints
,
14496 _(".debug_ranges entry has start address of zero"
14497 " [in module %s]"), objfile_name (objfile
));
14501 callback (range_beginning
, range_end
);
14507 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
14508 Return 1 if the attributes are present and valid, otherwise, return 0.
14509 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
14512 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
14513 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
14514 struct partial_symtab
*ranges_pst
)
14516 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14517 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14518 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
14519 SECT_OFF_TEXT (objfile
));
14522 CORE_ADDR high
= 0;
14525 retval
= dwarf2_ranges_process (offset
, cu
,
14526 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
14528 if (ranges_pst
!= NULL
)
14533 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
14534 range_beginning
+ baseaddr
);
14535 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
14536 range_end
+ baseaddr
);
14537 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
14541 /* FIXME: This is recording everything as a low-high
14542 segment of consecutive addresses. We should have a
14543 data structure for discontiguous block ranges
14547 low
= range_beginning
;
14553 if (range_beginning
< low
)
14554 low
= range_beginning
;
14555 if (range_end
> high
)
14563 /* If the first entry is an end-of-list marker, the range
14564 describes an empty scope, i.e. no instructions. */
14570 *high_return
= high
;
14574 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14575 definition for the return value. *LOWPC and *HIGHPC are set iff
14576 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14578 static enum pc_bounds_kind
14579 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14580 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14581 struct partial_symtab
*pst
)
14583 struct dwarf2_per_objfile
*dwarf2_per_objfile
14584 = cu
->per_cu
->dwarf2_per_objfile
;
14585 struct attribute
*attr
;
14586 struct attribute
*attr_high
;
14588 CORE_ADDR high
= 0;
14589 enum pc_bounds_kind ret
;
14591 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14594 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14597 low
= attr_value_as_address (attr
);
14598 high
= attr_value_as_address (attr_high
);
14599 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14603 /* Found high w/o low attribute. */
14604 return PC_BOUNDS_INVALID
;
14606 /* Found consecutive range of addresses. */
14607 ret
= PC_BOUNDS_HIGH_LOW
;
14611 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14614 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14615 We take advantage of the fact that DW_AT_ranges does not appear
14616 in DW_TAG_compile_unit of DWO files. */
14617 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14618 unsigned int ranges_offset
= (DW_UNSND (attr
)
14619 + (need_ranges_base
14623 /* Value of the DW_AT_ranges attribute is the offset in the
14624 .debug_ranges section. */
14625 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
14626 return PC_BOUNDS_INVALID
;
14627 /* Found discontinuous range of addresses. */
14628 ret
= PC_BOUNDS_RANGES
;
14631 return PC_BOUNDS_NOT_PRESENT
;
14634 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14636 return PC_BOUNDS_INVALID
;
14638 /* When using the GNU linker, .gnu.linkonce. sections are used to
14639 eliminate duplicate copies of functions and vtables and such.
14640 The linker will arbitrarily choose one and discard the others.
14641 The AT_*_pc values for such functions refer to local labels in
14642 these sections. If the section from that file was discarded, the
14643 labels are not in the output, so the relocs get a value of 0.
14644 If this is a discarded function, mark the pc bounds as invalid,
14645 so that GDB will ignore it. */
14646 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14647 return PC_BOUNDS_INVALID
;
14655 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14656 its low and high PC addresses. Do nothing if these addresses could not
14657 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14658 and HIGHPC to the high address if greater than HIGHPC. */
14661 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14662 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14663 struct dwarf2_cu
*cu
)
14665 CORE_ADDR low
, high
;
14666 struct die_info
*child
= die
->child
;
14668 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14670 *lowpc
= std::min (*lowpc
, low
);
14671 *highpc
= std::max (*highpc
, high
);
14674 /* If the language does not allow nested subprograms (either inside
14675 subprograms or lexical blocks), we're done. */
14676 if (cu
->language
!= language_ada
)
14679 /* Check all the children of the given DIE. If it contains nested
14680 subprograms, then check their pc bounds. Likewise, we need to
14681 check lexical blocks as well, as they may also contain subprogram
14683 while (child
&& child
->tag
)
14685 if (child
->tag
== DW_TAG_subprogram
14686 || child
->tag
== DW_TAG_lexical_block
)
14687 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14688 child
= sibling_die (child
);
14692 /* Get the low and high pc's represented by the scope DIE, and store
14693 them in *LOWPC and *HIGHPC. If the correct values can't be
14694 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14697 get_scope_pc_bounds (struct die_info
*die
,
14698 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14699 struct dwarf2_cu
*cu
)
14701 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14702 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14703 CORE_ADDR current_low
, current_high
;
14705 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14706 >= PC_BOUNDS_RANGES
)
14708 best_low
= current_low
;
14709 best_high
= current_high
;
14713 struct die_info
*child
= die
->child
;
14715 while (child
&& child
->tag
)
14717 switch (child
->tag
) {
14718 case DW_TAG_subprogram
:
14719 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14721 case DW_TAG_namespace
:
14722 case DW_TAG_module
:
14723 /* FIXME: carlton/2004-01-16: Should we do this for
14724 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14725 that current GCC's always emit the DIEs corresponding
14726 to definitions of methods of classes as children of a
14727 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14728 the DIEs giving the declarations, which could be
14729 anywhere). But I don't see any reason why the
14730 standards says that they have to be there. */
14731 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14733 if (current_low
!= ((CORE_ADDR
) -1))
14735 best_low
= std::min (best_low
, current_low
);
14736 best_high
= std::max (best_high
, current_high
);
14744 child
= sibling_die (child
);
14749 *highpc
= best_high
;
14752 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14756 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14757 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14759 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14760 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14761 struct attribute
*attr
;
14762 struct attribute
*attr_high
;
14764 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14767 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14770 CORE_ADDR low
= attr_value_as_address (attr
);
14771 CORE_ADDR high
= attr_value_as_address (attr_high
);
14773 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14776 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14777 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14778 record_block_range (block
, low
, high
- 1);
14782 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14785 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14786 We take advantage of the fact that DW_AT_ranges does not appear
14787 in DW_TAG_compile_unit of DWO files. */
14788 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14790 /* The value of the DW_AT_ranges attribute is the offset of the
14791 address range list in the .debug_ranges section. */
14792 unsigned long offset
= (DW_UNSND (attr
)
14793 + (need_ranges_base
? cu
->ranges_base
: 0));
14795 dwarf2_ranges_process (offset
, cu
,
14796 [&] (CORE_ADDR start
, CORE_ADDR end
)
14800 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14801 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14802 record_block_range (block
, start
, end
- 1);
14807 /* Check whether the producer field indicates either of GCC < 4.6, or the
14808 Intel C/C++ compiler, and cache the result in CU. */
14811 check_producer (struct dwarf2_cu
*cu
)
14815 if (cu
->producer
== NULL
)
14817 /* For unknown compilers expect their behavior is DWARF version
14820 GCC started to support .debug_types sections by -gdwarf-4 since
14821 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14822 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14823 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14824 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14826 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14828 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14829 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14831 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14832 cu
->producer_is_icc_lt_14
= major
< 14;
14835 /* For other non-GCC compilers, expect their behavior is DWARF version
14839 cu
->checked_producer
= 1;
14842 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14843 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14844 during 4.6.0 experimental. */
14847 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14849 if (!cu
->checked_producer
)
14850 check_producer (cu
);
14852 return cu
->producer_is_gxx_lt_4_6
;
14855 /* Return the default accessibility type if it is not overriden by
14856 DW_AT_accessibility. */
14858 static enum dwarf_access_attribute
14859 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14861 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14863 /* The default DWARF 2 accessibility for members is public, the default
14864 accessibility for inheritance is private. */
14866 if (die
->tag
!= DW_TAG_inheritance
)
14867 return DW_ACCESS_public
;
14869 return DW_ACCESS_private
;
14873 /* DWARF 3+ defines the default accessibility a different way. The same
14874 rules apply now for DW_TAG_inheritance as for the members and it only
14875 depends on the container kind. */
14877 if (die
->parent
->tag
== DW_TAG_class_type
)
14878 return DW_ACCESS_private
;
14880 return DW_ACCESS_public
;
14884 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14885 offset. If the attribute was not found return 0, otherwise return
14886 1. If it was found but could not properly be handled, set *OFFSET
14890 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14893 struct attribute
*attr
;
14895 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14900 /* Note that we do not check for a section offset first here.
14901 This is because DW_AT_data_member_location is new in DWARF 4,
14902 so if we see it, we can assume that a constant form is really
14903 a constant and not a section offset. */
14904 if (attr_form_is_constant (attr
))
14905 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
14906 else if (attr_form_is_section_offset (attr
))
14907 dwarf2_complex_location_expr_complaint ();
14908 else if (attr_form_is_block (attr
))
14909 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14911 dwarf2_complex_location_expr_complaint ();
14919 /* Add an aggregate field to the field list. */
14922 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14923 struct dwarf2_cu
*cu
)
14925 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14926 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14927 struct nextfield
*new_field
;
14928 struct attribute
*attr
;
14930 const char *fieldname
= "";
14932 if (die
->tag
== DW_TAG_inheritance
)
14934 fip
->baseclasses
.emplace_back ();
14935 new_field
= &fip
->baseclasses
.back ();
14939 fip
->fields
.emplace_back ();
14940 new_field
= &fip
->fields
.back ();
14945 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14947 new_field
->accessibility
= DW_UNSND (attr
);
14949 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
14950 if (new_field
->accessibility
!= DW_ACCESS_public
)
14951 fip
->non_public_fields
= 1;
14953 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14955 new_field
->virtuality
= DW_UNSND (attr
);
14957 new_field
->virtuality
= DW_VIRTUALITY_none
;
14959 fp
= &new_field
->field
;
14961 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
14965 /* Data member other than a C++ static data member. */
14967 /* Get type of field. */
14968 fp
->type
= die_type (die
, cu
);
14970 SET_FIELD_BITPOS (*fp
, 0);
14972 /* Get bit size of field (zero if none). */
14973 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
14976 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
14980 FIELD_BITSIZE (*fp
) = 0;
14983 /* Get bit offset of field. */
14984 if (handle_data_member_location (die
, cu
, &offset
))
14985 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
14986 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
14989 if (gdbarch_bits_big_endian (gdbarch
))
14991 /* For big endian bits, the DW_AT_bit_offset gives the
14992 additional bit offset from the MSB of the containing
14993 anonymous object to the MSB of the field. We don't
14994 have to do anything special since we don't need to
14995 know the size of the anonymous object. */
14996 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
15000 /* For little endian bits, compute the bit offset to the
15001 MSB of the anonymous object, subtract off the number of
15002 bits from the MSB of the field to the MSB of the
15003 object, and then subtract off the number of bits of
15004 the field itself. The result is the bit offset of
15005 the LSB of the field. */
15006 int anonymous_size
;
15007 int bit_offset
= DW_UNSND (attr
);
15009 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15012 /* The size of the anonymous object containing
15013 the bit field is explicit, so use the
15014 indicated size (in bytes). */
15015 anonymous_size
= DW_UNSND (attr
);
15019 /* The size of the anonymous object containing
15020 the bit field must be inferred from the type
15021 attribute of the data member containing the
15023 anonymous_size
= TYPE_LENGTH (fp
->type
);
15025 SET_FIELD_BITPOS (*fp
,
15026 (FIELD_BITPOS (*fp
)
15027 + anonymous_size
* bits_per_byte
15028 - bit_offset
- FIELD_BITSIZE (*fp
)));
15031 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
15033 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
15034 + dwarf2_get_attr_constant_value (attr
, 0)));
15036 /* Get name of field. */
15037 fieldname
= dwarf2_name (die
, cu
);
15038 if (fieldname
== NULL
)
15041 /* The name is already allocated along with this objfile, so we don't
15042 need to duplicate it for the type. */
15043 fp
->name
= fieldname
;
15045 /* Change accessibility for artificial fields (e.g. virtual table
15046 pointer or virtual base class pointer) to private. */
15047 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
15049 FIELD_ARTIFICIAL (*fp
) = 1;
15050 new_field
->accessibility
= DW_ACCESS_private
;
15051 fip
->non_public_fields
= 1;
15054 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
15056 /* C++ static member. */
15058 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
15059 is a declaration, but all versions of G++ as of this writing
15060 (so through at least 3.2.1) incorrectly generate
15061 DW_TAG_variable tags. */
15063 const char *physname
;
15065 /* Get name of field. */
15066 fieldname
= dwarf2_name (die
, cu
);
15067 if (fieldname
== NULL
)
15070 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15072 /* Only create a symbol if this is an external value.
15073 new_symbol checks this and puts the value in the global symbol
15074 table, which we want. If it is not external, new_symbol
15075 will try to put the value in cu->list_in_scope which is wrong. */
15076 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
15078 /* A static const member, not much different than an enum as far as
15079 we're concerned, except that we can support more types. */
15080 new_symbol (die
, NULL
, cu
);
15083 /* Get physical name. */
15084 physname
= dwarf2_physname (fieldname
, die
, cu
);
15086 /* The name is already allocated along with this objfile, so we don't
15087 need to duplicate it for the type. */
15088 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
15089 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15090 FIELD_NAME (*fp
) = fieldname
;
15092 else if (die
->tag
== DW_TAG_inheritance
)
15096 /* C++ base class field. */
15097 if (handle_data_member_location (die
, cu
, &offset
))
15098 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15099 FIELD_BITSIZE (*fp
) = 0;
15100 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15101 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
15103 else if (die
->tag
== DW_TAG_variant_part
)
15105 /* process_structure_scope will treat this DIE as a union. */
15106 process_structure_scope (die
, cu
);
15108 /* The variant part is relative to the start of the enclosing
15110 SET_FIELD_BITPOS (*fp
, 0);
15111 fp
->type
= get_die_type (die
, cu
);
15112 fp
->artificial
= 1;
15113 fp
->name
= "<<variant>>";
15116 gdb_assert_not_reached ("missing case in dwarf2_add_field");
15119 /* Can the type given by DIE define another type? */
15122 type_can_define_types (const struct die_info
*die
)
15126 case DW_TAG_typedef
:
15127 case DW_TAG_class_type
:
15128 case DW_TAG_structure_type
:
15129 case DW_TAG_union_type
:
15130 case DW_TAG_enumeration_type
:
15138 /* Add a type definition defined in the scope of the FIP's class. */
15141 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
15142 struct dwarf2_cu
*cu
)
15144 struct decl_field fp
;
15145 memset (&fp
, 0, sizeof (fp
));
15147 gdb_assert (type_can_define_types (die
));
15149 /* Get name of field. NULL is okay here, meaning an anonymous type. */
15150 fp
.name
= dwarf2_name (die
, cu
);
15151 fp
.type
= read_type_die (die
, cu
);
15153 /* Save accessibility. */
15154 enum dwarf_access_attribute accessibility
;
15155 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15157 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15159 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15160 switch (accessibility
)
15162 case DW_ACCESS_public
:
15163 /* The assumed value if neither private nor protected. */
15165 case DW_ACCESS_private
:
15168 case DW_ACCESS_protected
:
15169 fp
.is_protected
= 1;
15172 complaint (&symfile_complaints
,
15173 _("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
15176 if (die
->tag
== DW_TAG_typedef
)
15177 fip
->typedef_field_list
.push_back (fp
);
15179 fip
->nested_types_list
.push_back (fp
);
15182 /* Create the vector of fields, and attach it to the type. */
15185 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
15186 struct dwarf2_cu
*cu
)
15188 int nfields
= fip
->nfields
;
15190 /* Record the field count, allocate space for the array of fields,
15191 and create blank accessibility bitfields if necessary. */
15192 TYPE_NFIELDS (type
) = nfields
;
15193 TYPE_FIELDS (type
) = (struct field
*)
15194 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
15196 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
15198 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15200 TYPE_FIELD_PRIVATE_BITS (type
) =
15201 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15202 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
15204 TYPE_FIELD_PROTECTED_BITS (type
) =
15205 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15206 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
15208 TYPE_FIELD_IGNORE_BITS (type
) =
15209 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15210 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
15213 /* If the type has baseclasses, allocate and clear a bit vector for
15214 TYPE_FIELD_VIRTUAL_BITS. */
15215 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
15217 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
15218 unsigned char *pointer
;
15220 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15221 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
15222 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
15223 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
15224 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
15227 if (TYPE_FLAG_DISCRIMINATED_UNION (type
))
15229 struct discriminant_info
*di
= alloc_discriminant_info (type
, -1, -1);
15231 for (int index
= 0; index
< nfields
; ++index
)
15233 struct nextfield
&field
= fip
->fields
[index
];
15235 if (field
.variant
.is_discriminant
)
15236 di
->discriminant_index
= index
;
15237 else if (field
.variant
.default_branch
)
15238 di
->default_index
= index
;
15240 di
->discriminants
[index
] = field
.variant
.discriminant_value
;
15244 /* Copy the saved-up fields into the field vector. */
15245 for (int i
= 0; i
< nfields
; ++i
)
15247 struct nextfield
&field
15248 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
15249 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
15251 TYPE_FIELD (type
, i
) = field
.field
;
15252 switch (field
.accessibility
)
15254 case DW_ACCESS_private
:
15255 if (cu
->language
!= language_ada
)
15256 SET_TYPE_FIELD_PRIVATE (type
, i
);
15259 case DW_ACCESS_protected
:
15260 if (cu
->language
!= language_ada
)
15261 SET_TYPE_FIELD_PROTECTED (type
, i
);
15264 case DW_ACCESS_public
:
15268 /* Unknown accessibility. Complain and treat it as public. */
15270 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
15271 field
.accessibility
);
15275 if (i
< fip
->baseclasses
.size ())
15277 switch (field
.virtuality
)
15279 case DW_VIRTUALITY_virtual
:
15280 case DW_VIRTUALITY_pure_virtual
:
15281 if (cu
->language
== language_ada
)
15282 error (_("unexpected virtuality in component of Ada type"));
15283 SET_TYPE_FIELD_VIRTUAL (type
, i
);
15290 /* Return true if this member function is a constructor, false
15294 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
15296 const char *fieldname
;
15297 const char *type_name
;
15300 if (die
->parent
== NULL
)
15303 if (die
->parent
->tag
!= DW_TAG_structure_type
15304 && die
->parent
->tag
!= DW_TAG_union_type
15305 && die
->parent
->tag
!= DW_TAG_class_type
)
15308 fieldname
= dwarf2_name (die
, cu
);
15309 type_name
= dwarf2_name (die
->parent
, cu
);
15310 if (fieldname
== NULL
|| type_name
== NULL
)
15313 len
= strlen (fieldname
);
15314 return (strncmp (fieldname
, type_name
, len
) == 0
15315 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
15318 /* Add a member function to the proper fieldlist. */
15321 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15322 struct type
*type
, struct dwarf2_cu
*cu
)
15324 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15325 struct attribute
*attr
;
15327 struct fnfieldlist
*flp
= nullptr;
15328 struct fn_field
*fnp
;
15329 const char *fieldname
;
15330 struct type
*this_type
;
15331 enum dwarf_access_attribute accessibility
;
15333 if (cu
->language
== language_ada
)
15334 error (_("unexpected member function in Ada type"));
15336 /* Get name of member function. */
15337 fieldname
= dwarf2_name (die
, cu
);
15338 if (fieldname
== NULL
)
15341 /* Look up member function name in fieldlist. */
15342 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15344 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15346 flp
= &fip
->fnfieldlists
[i
];
15351 /* Create a new fnfieldlist if necessary. */
15352 if (flp
== nullptr)
15354 fip
->fnfieldlists
.emplace_back ();
15355 flp
= &fip
->fnfieldlists
.back ();
15356 flp
->name
= fieldname
;
15357 i
= fip
->fnfieldlists
.size () - 1;
15360 /* Create a new member function field and add it to the vector of
15362 flp
->fnfields
.emplace_back ();
15363 fnp
= &flp
->fnfields
.back ();
15365 /* Delay processing of the physname until later. */
15366 if (cu
->language
== language_cplus
)
15367 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15371 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15372 fnp
->physname
= physname
? physname
: "";
15375 fnp
->type
= alloc_type (objfile
);
15376 this_type
= read_type_die (die
, cu
);
15377 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
15379 int nparams
= TYPE_NFIELDS (this_type
);
15381 /* TYPE is the domain of this method, and THIS_TYPE is the type
15382 of the method itself (TYPE_CODE_METHOD). */
15383 smash_to_method_type (fnp
->type
, type
,
15384 TYPE_TARGET_TYPE (this_type
),
15385 TYPE_FIELDS (this_type
),
15386 TYPE_NFIELDS (this_type
),
15387 TYPE_VARARGS (this_type
));
15389 /* Handle static member functions.
15390 Dwarf2 has no clean way to discern C++ static and non-static
15391 member functions. G++ helps GDB by marking the first
15392 parameter for non-static member functions (which is the this
15393 pointer) as artificial. We obtain this information from
15394 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15395 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15396 fnp
->voffset
= VOFFSET_STATIC
;
15399 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
15400 dwarf2_full_name (fieldname
, die
, cu
));
15402 /* Get fcontext from DW_AT_containing_type if present. */
15403 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15404 fnp
->fcontext
= die_containing_type (die
, cu
);
15406 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15407 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15409 /* Get accessibility. */
15410 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15412 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15414 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15415 switch (accessibility
)
15417 case DW_ACCESS_private
:
15418 fnp
->is_private
= 1;
15420 case DW_ACCESS_protected
:
15421 fnp
->is_protected
= 1;
15425 /* Check for artificial methods. */
15426 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15427 if (attr
&& DW_UNSND (attr
) != 0)
15428 fnp
->is_artificial
= 1;
15430 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15432 /* Get index in virtual function table if it is a virtual member
15433 function. For older versions of GCC, this is an offset in the
15434 appropriate virtual table, as specified by DW_AT_containing_type.
15435 For everyone else, it is an expression to be evaluated relative
15436 to the object address. */
15438 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15441 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
15443 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15445 /* Old-style GCC. */
15446 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15448 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15449 || (DW_BLOCK (attr
)->size
> 1
15450 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15451 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15453 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15454 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15455 dwarf2_complex_location_expr_complaint ();
15457 fnp
->voffset
/= cu
->header
.addr_size
;
15461 dwarf2_complex_location_expr_complaint ();
15463 if (!fnp
->fcontext
)
15465 /* If there is no `this' field and no DW_AT_containing_type,
15466 we cannot actually find a base class context for the
15468 if (TYPE_NFIELDS (this_type
) == 0
15469 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15471 complaint (&symfile_complaints
,
15472 _("cannot determine context for virtual member "
15473 "function \"%s\" (offset %s)"),
15474 fieldname
, sect_offset_str (die
->sect_off
));
15479 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15483 else if (attr_form_is_section_offset (attr
))
15485 dwarf2_complex_location_expr_complaint ();
15489 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15495 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15496 if (attr
&& DW_UNSND (attr
))
15498 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15499 complaint (&symfile_complaints
,
15500 _("Member function \"%s\" (offset %s) is virtual "
15501 "but the vtable offset is not specified"),
15502 fieldname
, sect_offset_str (die
->sect_off
));
15503 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15504 TYPE_CPLUS_DYNAMIC (type
) = 1;
15509 /* Create the vector of member function fields, and attach it to the type. */
15512 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15513 struct dwarf2_cu
*cu
)
15515 if (cu
->language
== language_ada
)
15516 error (_("unexpected member functions in Ada type"));
15518 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15519 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15521 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15523 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15525 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15526 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15528 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15529 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15530 fn_flp
->fn_fields
= (struct fn_field
*)
15531 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15533 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15534 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15537 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15540 /* Returns non-zero if NAME is the name of a vtable member in CU's
15541 language, zero otherwise. */
15543 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15545 static const char vptr
[] = "_vptr";
15547 /* Look for the C++ form of the vtable. */
15548 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15554 /* GCC outputs unnamed structures that are really pointers to member
15555 functions, with the ABI-specified layout. If TYPE describes
15556 such a structure, smash it into a member function type.
15558 GCC shouldn't do this; it should just output pointer to member DIEs.
15559 This is GCC PR debug/28767. */
15562 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15564 struct type
*pfn_type
, *self_type
, *new_type
;
15566 /* Check for a structure with no name and two children. */
15567 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15570 /* Check for __pfn and __delta members. */
15571 if (TYPE_FIELD_NAME (type
, 0) == NULL
15572 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15573 || TYPE_FIELD_NAME (type
, 1) == NULL
15574 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15577 /* Find the type of the method. */
15578 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15579 if (pfn_type
== NULL
15580 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15581 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15584 /* Look for the "this" argument. */
15585 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15586 if (TYPE_NFIELDS (pfn_type
) == 0
15587 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15588 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15591 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15592 new_type
= alloc_type (objfile
);
15593 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15594 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15595 TYPE_VARARGS (pfn_type
));
15596 smash_to_methodptr_type (type
, new_type
);
15599 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15600 appropriate error checking and issuing complaints if there is a
15604 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15606 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15608 if (attr
== nullptr)
15611 if (!attr_form_is_constant (attr
))
15613 complaint (&symfile_complaints
,
15614 _("DW_AT_alignment must have constant form"
15615 " - DIE at %s [in module %s]"),
15616 sect_offset_str (die
->sect_off
),
15617 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15622 if (attr
->form
== DW_FORM_sdata
)
15624 LONGEST val
= DW_SND (attr
);
15627 complaint (&symfile_complaints
,
15628 _("DW_AT_alignment value must not be negative"
15629 " - DIE at %s [in module %s]"),
15630 sect_offset_str (die
->sect_off
),
15631 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15637 align
= DW_UNSND (attr
);
15641 complaint (&symfile_complaints
,
15642 _("DW_AT_alignment value must not be zero"
15643 " - DIE at %s [in module %s]"),
15644 sect_offset_str (die
->sect_off
),
15645 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15648 if ((align
& (align
- 1)) != 0)
15650 complaint (&symfile_complaints
,
15651 _("DW_AT_alignment value must be a power of 2"
15652 " - DIE at %s [in module %s]"),
15653 sect_offset_str (die
->sect_off
),
15654 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15661 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15662 the alignment for TYPE. */
15665 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15668 if (!set_type_align (type
, get_alignment (cu
, die
)))
15669 complaint (&symfile_complaints
,
15670 _("DW_AT_alignment value too large"
15671 " - DIE at %s [in module %s]"),
15672 sect_offset_str (die
->sect_off
),
15673 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15676 /* Called when we find the DIE that starts a structure or union scope
15677 (definition) to create a type for the structure or union. Fill in
15678 the type's name and general properties; the members will not be
15679 processed until process_structure_scope. A symbol table entry for
15680 the type will also not be done until process_structure_scope (assuming
15681 the type has a name).
15683 NOTE: we need to call these functions regardless of whether or not the
15684 DIE has a DW_AT_name attribute, since it might be an anonymous
15685 structure or union. This gets the type entered into our set of
15686 user defined types. */
15688 static struct type
*
15689 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15691 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15693 struct attribute
*attr
;
15696 /* If the definition of this type lives in .debug_types, read that type.
15697 Don't follow DW_AT_specification though, that will take us back up
15698 the chain and we want to go down. */
15699 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
15702 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15704 /* The type's CU may not be the same as CU.
15705 Ensure TYPE is recorded with CU in die_type_hash. */
15706 return set_die_type (die
, type
, cu
);
15709 type
= alloc_type (objfile
);
15710 INIT_CPLUS_SPECIFIC (type
);
15712 name
= dwarf2_name (die
, cu
);
15715 if (cu
->language
== language_cplus
15716 || cu
->language
== language_d
15717 || cu
->language
== language_rust
)
15719 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15721 /* dwarf2_full_name might have already finished building the DIE's
15722 type. If so, there is no need to continue. */
15723 if (get_die_type (die
, cu
) != NULL
)
15724 return get_die_type (die
, cu
);
15726 TYPE_TAG_NAME (type
) = full_name
;
15727 if (die
->tag
== DW_TAG_structure_type
15728 || die
->tag
== DW_TAG_class_type
)
15729 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
15733 /* The name is already allocated along with this objfile, so
15734 we don't need to duplicate it for the type. */
15735 TYPE_TAG_NAME (type
) = name
;
15736 if (die
->tag
== DW_TAG_class_type
)
15737 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
15741 if (die
->tag
== DW_TAG_structure_type
)
15743 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15745 else if (die
->tag
== DW_TAG_union_type
)
15747 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15749 else if (die
->tag
== DW_TAG_variant_part
)
15751 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15752 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
15756 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15759 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15760 TYPE_DECLARED_CLASS (type
) = 1;
15762 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15765 if (attr_form_is_constant (attr
))
15766 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15769 /* For the moment, dynamic type sizes are not supported
15770 by GDB's struct type. The actual size is determined
15771 on-demand when resolving the type of a given object,
15772 so set the type's length to zero for now. Otherwise,
15773 we record an expression as the length, and that expression
15774 could lead to a very large value, which could eventually
15775 lead to us trying to allocate that much memory when creating
15776 a value of that type. */
15777 TYPE_LENGTH (type
) = 0;
15782 TYPE_LENGTH (type
) = 0;
15785 maybe_set_alignment (cu
, die
, type
);
15787 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15789 /* ICC<14 does not output the required DW_AT_declaration on
15790 incomplete types, but gives them a size of zero. */
15791 TYPE_STUB (type
) = 1;
15794 TYPE_STUB_SUPPORTED (type
) = 1;
15796 if (die_is_declaration (die
, cu
))
15797 TYPE_STUB (type
) = 1;
15798 else if (attr
== NULL
&& die
->child
== NULL
15799 && producer_is_realview (cu
->producer
))
15800 /* RealView does not output the required DW_AT_declaration
15801 on incomplete types. */
15802 TYPE_STUB (type
) = 1;
15804 /* We need to add the type field to the die immediately so we don't
15805 infinitely recurse when dealing with pointers to the structure
15806 type within the structure itself. */
15807 set_die_type (die
, type
, cu
);
15809 /* set_die_type should be already done. */
15810 set_descriptive_type (type
, die
, cu
);
15815 /* A helper for process_structure_scope that handles a single member
15819 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15820 struct field_info
*fi
,
15821 std::vector
<struct symbol
*> *template_args
,
15822 struct dwarf2_cu
*cu
)
15824 if (child_die
->tag
== DW_TAG_member
15825 || child_die
->tag
== DW_TAG_variable
15826 || child_die
->tag
== DW_TAG_variant_part
)
15828 /* NOTE: carlton/2002-11-05: A C++ static data member
15829 should be a DW_TAG_member that is a declaration, but
15830 all versions of G++ as of this writing (so through at
15831 least 3.2.1) incorrectly generate DW_TAG_variable
15832 tags for them instead. */
15833 dwarf2_add_field (fi
, child_die
, cu
);
15835 else if (child_die
->tag
== DW_TAG_subprogram
)
15837 /* Rust doesn't have member functions in the C++ sense.
15838 However, it does emit ordinary functions as children
15839 of a struct DIE. */
15840 if (cu
->language
== language_rust
)
15841 read_func_scope (child_die
, cu
);
15844 /* C++ member function. */
15845 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15848 else if (child_die
->tag
== DW_TAG_inheritance
)
15850 /* C++ base class field. */
15851 dwarf2_add_field (fi
, child_die
, cu
);
15853 else if (type_can_define_types (child_die
))
15854 dwarf2_add_type_defn (fi
, child_die
, cu
);
15855 else if (child_die
->tag
== DW_TAG_template_type_param
15856 || child_die
->tag
== DW_TAG_template_value_param
)
15858 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15861 template_args
->push_back (arg
);
15863 else if (child_die
->tag
== DW_TAG_variant
)
15865 /* In a variant we want to get the discriminant and also add a
15866 field for our sole member child. */
15867 struct attribute
*discr
= dwarf2_attr (child_die
, DW_AT_discr_value
, cu
);
15869 for (struct die_info
*variant_child
= child_die
->child
;
15870 variant_child
!= NULL
;
15871 variant_child
= sibling_die (variant_child
))
15873 if (variant_child
->tag
== DW_TAG_member
)
15875 handle_struct_member_die (variant_child
, type
, fi
,
15876 template_args
, cu
);
15877 /* Only handle the one. */
15882 /* We don't handle this but we might as well report it if we see
15884 if (dwarf2_attr (child_die
, DW_AT_discr_list
, cu
) != nullptr)
15885 complaint (&symfile_complaints
,
15886 _("DW_AT_discr_list is not supported yet"
15887 " - DIE at %s [in module %s]"),
15888 sect_offset_str (child_die
->sect_off
),
15889 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15891 /* The first field was just added, so we can stash the
15892 discriminant there. */
15893 gdb_assert (!fi
->fields
.empty ());
15895 fi
->fields
.back ().variant
.default_branch
= true;
15897 fi
->fields
.back ().variant
.discriminant_value
= DW_UNSND (discr
);
15901 /* Finish creating a structure or union type, including filling in
15902 its members and creating a symbol for it. */
15905 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15907 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15908 struct die_info
*child_die
;
15911 type
= get_die_type (die
, cu
);
15913 type
= read_structure_type (die
, cu
);
15915 /* When reading a DW_TAG_variant_part, we need to notice when we
15916 read the discriminant member, so we can record it later in the
15917 discriminant_info. */
15918 bool is_variant_part
= TYPE_FLAG_DISCRIMINATED_UNION (type
);
15919 sect_offset discr_offset
;
15921 if (is_variant_part
)
15923 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15926 /* Maybe it's a univariant form, an extension we support.
15927 In this case arrange not to check the offset. */
15928 is_variant_part
= false;
15930 else if (attr_form_is_ref (discr
))
15932 struct dwarf2_cu
*target_cu
= cu
;
15933 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15935 discr_offset
= target_die
->sect_off
;
15939 complaint (&symfile_complaints
,
15940 _("DW_AT_discr does not have DIE reference form"
15941 " - DIE at %s [in module %s]"),
15942 sect_offset_str (die
->sect_off
),
15943 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15944 is_variant_part
= false;
15948 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15950 struct field_info fi
;
15951 std::vector
<struct symbol
*> template_args
;
15953 child_die
= die
->child
;
15955 while (child_die
&& child_die
->tag
)
15957 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15959 if (is_variant_part
&& discr_offset
== child_die
->sect_off
)
15960 fi
.fields
.back ().variant
.is_discriminant
= true;
15962 child_die
= sibling_die (child_die
);
15965 /* Attach template arguments to type. */
15966 if (!template_args
.empty ())
15968 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15969 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15970 TYPE_TEMPLATE_ARGUMENTS (type
)
15971 = XOBNEWVEC (&objfile
->objfile_obstack
,
15973 TYPE_N_TEMPLATE_ARGUMENTS (type
));
15974 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
15975 template_args
.data (),
15976 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
15977 * sizeof (struct symbol
*)));
15980 /* Attach fields and member functions to the type. */
15982 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
15983 if (!fi
.fnfieldlists
.empty ())
15985 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
15987 /* Get the type which refers to the base class (possibly this
15988 class itself) which contains the vtable pointer for the current
15989 class from the DW_AT_containing_type attribute. This use of
15990 DW_AT_containing_type is a GNU extension. */
15992 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15994 struct type
*t
= die_containing_type (die
, cu
);
15996 set_type_vptr_basetype (type
, t
);
16001 /* Our own class provides vtbl ptr. */
16002 for (i
= TYPE_NFIELDS (t
) - 1;
16003 i
>= TYPE_N_BASECLASSES (t
);
16006 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
16008 if (is_vtable_name (fieldname
, cu
))
16010 set_type_vptr_fieldno (type
, i
);
16015 /* Complain if virtual function table field not found. */
16016 if (i
< TYPE_N_BASECLASSES (t
))
16017 complaint (&symfile_complaints
,
16018 _("virtual function table pointer "
16019 "not found when defining class '%s'"),
16020 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
16025 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
16028 else if (cu
->producer
16029 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
16031 /* The IBM XLC compiler does not provide direct indication
16032 of the containing type, but the vtable pointer is
16033 always named __vfp. */
16037 for (i
= TYPE_NFIELDS (type
) - 1;
16038 i
>= TYPE_N_BASECLASSES (type
);
16041 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
16043 set_type_vptr_fieldno (type
, i
);
16044 set_type_vptr_basetype (type
, type
);
16051 /* Copy fi.typedef_field_list linked list elements content into the
16052 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
16053 if (!fi
.typedef_field_list
.empty ())
16055 int count
= fi
.typedef_field_list
.size ();
16057 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16058 TYPE_TYPEDEF_FIELD_ARRAY (type
)
16059 = ((struct decl_field
*)
16061 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
16062 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
16064 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
16065 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
16068 /* Copy fi.nested_types_list linked list elements content into the
16069 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
16070 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
16072 int count
= fi
.nested_types_list
.size ();
16074 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16075 TYPE_NESTED_TYPES_ARRAY (type
)
16076 = ((struct decl_field
*)
16077 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
16078 TYPE_NESTED_TYPES_COUNT (type
) = count
;
16080 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
16081 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
16085 quirk_gcc_member_function_pointer (type
, objfile
);
16086 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
16087 cu
->rust_unions
.push_back (type
);
16089 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
16090 snapshots) has been known to create a die giving a declaration
16091 for a class that has, as a child, a die giving a definition for a
16092 nested class. So we have to process our children even if the
16093 current die is a declaration. Normally, of course, a declaration
16094 won't have any children at all. */
16096 child_die
= die
->child
;
16098 while (child_die
!= NULL
&& child_die
->tag
)
16100 if (child_die
->tag
== DW_TAG_member
16101 || child_die
->tag
== DW_TAG_variable
16102 || child_die
->tag
== DW_TAG_inheritance
16103 || child_die
->tag
== DW_TAG_template_value_param
16104 || child_die
->tag
== DW_TAG_template_type_param
)
16109 process_die (child_die
, cu
);
16111 child_die
= sibling_die (child_die
);
16114 /* Do not consider external references. According to the DWARF standard,
16115 these DIEs are identified by the fact that they have no byte_size
16116 attribute, and a declaration attribute. */
16117 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
16118 || !die_is_declaration (die
, cu
))
16119 new_symbol (die
, type
, cu
);
16122 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
16123 update TYPE using some information only available in DIE's children. */
16126 update_enumeration_type_from_children (struct die_info
*die
,
16128 struct dwarf2_cu
*cu
)
16130 struct die_info
*child_die
;
16131 int unsigned_enum
= 1;
16135 auto_obstack obstack
;
16137 for (child_die
= die
->child
;
16138 child_die
!= NULL
&& child_die
->tag
;
16139 child_die
= sibling_die (child_die
))
16141 struct attribute
*attr
;
16143 const gdb_byte
*bytes
;
16144 struct dwarf2_locexpr_baton
*baton
;
16147 if (child_die
->tag
!= DW_TAG_enumerator
)
16150 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
16154 name
= dwarf2_name (child_die
, cu
);
16156 name
= "<anonymous enumerator>";
16158 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
16159 &value
, &bytes
, &baton
);
16165 else if ((mask
& value
) != 0)
16170 /* If we already know that the enum type is neither unsigned, nor
16171 a flag type, no need to look at the rest of the enumerates. */
16172 if (!unsigned_enum
&& !flag_enum
)
16177 TYPE_UNSIGNED (type
) = 1;
16179 TYPE_FLAG_ENUM (type
) = 1;
16182 /* Given a DW_AT_enumeration_type die, set its type. We do not
16183 complete the type's fields yet, or create any symbols. */
16185 static struct type
*
16186 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16188 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16190 struct attribute
*attr
;
16193 /* If the definition of this type lives in .debug_types, read that type.
16194 Don't follow DW_AT_specification though, that will take us back up
16195 the chain and we want to go down. */
16196 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
16199 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16201 /* The type's CU may not be the same as CU.
16202 Ensure TYPE is recorded with CU in die_type_hash. */
16203 return set_die_type (die
, type
, cu
);
16206 type
= alloc_type (objfile
);
16208 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
16209 name
= dwarf2_full_name (NULL
, die
, cu
);
16211 TYPE_TAG_NAME (type
) = name
;
16213 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16216 struct type
*underlying_type
= die_type (die
, cu
);
16218 TYPE_TARGET_TYPE (type
) = underlying_type
;
16221 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16224 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16228 TYPE_LENGTH (type
) = 0;
16231 maybe_set_alignment (cu
, die
, type
);
16233 /* The enumeration DIE can be incomplete. In Ada, any type can be
16234 declared as private in the package spec, and then defined only
16235 inside the package body. Such types are known as Taft Amendment
16236 Types. When another package uses such a type, an incomplete DIE
16237 may be generated by the compiler. */
16238 if (die_is_declaration (die
, cu
))
16239 TYPE_STUB (type
) = 1;
16241 /* Finish the creation of this type by using the enum's children.
16242 We must call this even when the underlying type has been provided
16243 so that we can determine if we're looking at a "flag" enum. */
16244 update_enumeration_type_from_children (die
, type
, cu
);
16246 /* If this type has an underlying type that is not a stub, then we
16247 may use its attributes. We always use the "unsigned" attribute
16248 in this situation, because ordinarily we guess whether the type
16249 is unsigned -- but the guess can be wrong and the underlying type
16250 can tell us the reality. However, we defer to a local size
16251 attribute if one exists, because this lets the compiler override
16252 the underlying type if needed. */
16253 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16255 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
16256 if (TYPE_LENGTH (type
) == 0)
16257 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
16258 if (TYPE_RAW_ALIGN (type
) == 0
16259 && TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)) != 0)
16260 set_type_align (type
, TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)));
16263 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16265 return set_die_type (die
, type
, cu
);
16268 /* Given a pointer to a die which begins an enumeration, process all
16269 the dies that define the members of the enumeration, and create the
16270 symbol for the enumeration type.
16272 NOTE: We reverse the order of the element list. */
16275 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16277 struct type
*this_type
;
16279 this_type
= get_die_type (die
, cu
);
16280 if (this_type
== NULL
)
16281 this_type
= read_enumeration_type (die
, cu
);
16283 if (die
->child
!= NULL
)
16285 struct die_info
*child_die
;
16286 struct symbol
*sym
;
16287 struct field
*fields
= NULL
;
16288 int num_fields
= 0;
16291 child_die
= die
->child
;
16292 while (child_die
&& child_die
->tag
)
16294 if (child_die
->tag
!= DW_TAG_enumerator
)
16296 process_die (child_die
, cu
);
16300 name
= dwarf2_name (child_die
, cu
);
16303 sym
= new_symbol (child_die
, this_type
, cu
);
16305 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
16307 fields
= (struct field
*)
16309 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
16310 * sizeof (struct field
));
16313 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
16314 FIELD_TYPE (fields
[num_fields
]) = NULL
;
16315 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
16316 FIELD_BITSIZE (fields
[num_fields
]) = 0;
16322 child_die
= sibling_die (child_die
);
16327 TYPE_NFIELDS (this_type
) = num_fields
;
16328 TYPE_FIELDS (this_type
) = (struct field
*)
16329 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
16330 memcpy (TYPE_FIELDS (this_type
), fields
,
16331 sizeof (struct field
) * num_fields
);
16336 /* If we are reading an enum from a .debug_types unit, and the enum
16337 is a declaration, and the enum is not the signatured type in the
16338 unit, then we do not want to add a symbol for it. Adding a
16339 symbol would in some cases obscure the true definition of the
16340 enum, giving users an incomplete type when the definition is
16341 actually available. Note that we do not want to do this for all
16342 enums which are just declarations, because C++0x allows forward
16343 enum declarations. */
16344 if (cu
->per_cu
->is_debug_types
16345 && die_is_declaration (die
, cu
))
16347 struct signatured_type
*sig_type
;
16349 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16350 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16351 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16355 new_symbol (die
, this_type
, cu
);
16358 /* Extract all information from a DW_TAG_array_type DIE and put it in
16359 the DIE's type field. For now, this only handles one dimensional
16362 static struct type
*
16363 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16365 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16366 struct die_info
*child_die
;
16368 struct type
*element_type
, *range_type
, *index_type
;
16369 struct attribute
*attr
;
16371 struct dynamic_prop
*byte_stride_prop
= NULL
;
16372 unsigned int bit_stride
= 0;
16374 element_type
= die_type (die
, cu
);
16376 /* The die_type call above may have already set the type for this DIE. */
16377 type
= get_die_type (die
, cu
);
16381 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16387 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16388 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
);
16391 complaint (&symfile_complaints
,
16392 _("unable to read array DW_AT_byte_stride "
16393 " - DIE at %s [in module %s]"),
16394 sect_offset_str (die
->sect_off
),
16395 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16396 /* Ignore this attribute. We will likely not be able to print
16397 arrays of this type correctly, but there is little we can do
16398 to help if we cannot read the attribute's value. */
16399 byte_stride_prop
= NULL
;
16403 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16405 bit_stride
= DW_UNSND (attr
);
16407 /* Irix 6.2 native cc creates array types without children for
16408 arrays with unspecified length. */
16409 if (die
->child
== NULL
)
16411 index_type
= objfile_type (objfile
)->builtin_int
;
16412 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16413 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16414 byte_stride_prop
, bit_stride
);
16415 return set_die_type (die
, type
, cu
);
16418 std::vector
<struct type
*> range_types
;
16419 child_die
= die
->child
;
16420 while (child_die
&& child_die
->tag
)
16422 if (child_die
->tag
== DW_TAG_subrange_type
)
16424 struct type
*child_type
= read_type_die (child_die
, cu
);
16426 if (child_type
!= NULL
)
16428 /* The range type was succesfully read. Save it for the
16429 array type creation. */
16430 range_types
.push_back (child_type
);
16433 child_die
= sibling_die (child_die
);
16436 /* Dwarf2 dimensions are output from left to right, create the
16437 necessary array types in backwards order. */
16439 type
= element_type
;
16441 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16445 while (i
< range_types
.size ())
16446 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16447 byte_stride_prop
, bit_stride
);
16451 size_t ndim
= range_types
.size ();
16453 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16454 byte_stride_prop
, bit_stride
);
16457 /* Understand Dwarf2 support for vector types (like they occur on
16458 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16459 array type. This is not part of the Dwarf2/3 standard yet, but a
16460 custom vendor extension. The main difference between a regular
16461 array and the vector variant is that vectors are passed by value
16463 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16465 make_vector_type (type
);
16467 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16468 implementation may choose to implement triple vectors using this
16470 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16473 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16474 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16476 complaint (&symfile_complaints
,
16477 _("DW_AT_byte_size for array type smaller "
16478 "than the total size of elements"));
16481 name
= dwarf2_name (die
, cu
);
16483 TYPE_NAME (type
) = name
;
16485 maybe_set_alignment (cu
, die
, type
);
16487 /* Install the type in the die. */
16488 set_die_type (die
, type
, cu
);
16490 /* set_die_type should be already done. */
16491 set_descriptive_type (type
, die
, cu
);
16496 static enum dwarf_array_dim_ordering
16497 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16499 struct attribute
*attr
;
16501 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16504 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16506 /* GNU F77 is a special case, as at 08/2004 array type info is the
16507 opposite order to the dwarf2 specification, but data is still
16508 laid out as per normal fortran.
16510 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16511 version checking. */
16513 if (cu
->language
== language_fortran
16514 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16516 return DW_ORD_row_major
;
16519 switch (cu
->language_defn
->la_array_ordering
)
16521 case array_column_major
:
16522 return DW_ORD_col_major
;
16523 case array_row_major
:
16525 return DW_ORD_row_major
;
16529 /* Extract all information from a DW_TAG_set_type DIE and put it in
16530 the DIE's type field. */
16532 static struct type
*
16533 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16535 struct type
*domain_type
, *set_type
;
16536 struct attribute
*attr
;
16538 domain_type
= die_type (die
, cu
);
16540 /* The die_type call above may have already set the type for this DIE. */
16541 set_type
= get_die_type (die
, cu
);
16545 set_type
= create_set_type (NULL
, domain_type
);
16547 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16549 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16551 maybe_set_alignment (cu
, die
, set_type
);
16553 return set_die_type (die
, set_type
, cu
);
16556 /* A helper for read_common_block that creates a locexpr baton.
16557 SYM is the symbol which we are marking as computed.
16558 COMMON_DIE is the DIE for the common block.
16559 COMMON_LOC is the location expression attribute for the common
16561 MEMBER_LOC is the location expression attribute for the particular
16562 member of the common block that we are processing.
16563 CU is the CU from which the above come. */
16566 mark_common_block_symbol_computed (struct symbol
*sym
,
16567 struct die_info
*common_die
,
16568 struct attribute
*common_loc
,
16569 struct attribute
*member_loc
,
16570 struct dwarf2_cu
*cu
)
16572 struct dwarf2_per_objfile
*dwarf2_per_objfile
16573 = cu
->per_cu
->dwarf2_per_objfile
;
16574 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16575 struct dwarf2_locexpr_baton
*baton
;
16577 unsigned int cu_off
;
16578 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
16579 LONGEST offset
= 0;
16581 gdb_assert (common_loc
&& member_loc
);
16582 gdb_assert (attr_form_is_block (common_loc
));
16583 gdb_assert (attr_form_is_block (member_loc
)
16584 || attr_form_is_constant (member_loc
));
16586 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16587 baton
->per_cu
= cu
->per_cu
;
16588 gdb_assert (baton
->per_cu
);
16590 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16592 if (attr_form_is_constant (member_loc
))
16594 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
16595 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16598 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16600 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16603 *ptr
++ = DW_OP_call4
;
16604 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16605 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16608 if (attr_form_is_constant (member_loc
))
16610 *ptr
++ = DW_OP_addr
;
16611 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16612 ptr
+= cu
->header
.addr_size
;
16616 /* We have to copy the data here, because DW_OP_call4 will only
16617 use a DW_AT_location attribute. */
16618 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16619 ptr
+= DW_BLOCK (member_loc
)->size
;
16622 *ptr
++ = DW_OP_plus
;
16623 gdb_assert (ptr
- baton
->data
== baton
->size
);
16625 SYMBOL_LOCATION_BATON (sym
) = baton
;
16626 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16629 /* Create appropriate locally-scoped variables for all the
16630 DW_TAG_common_block entries. Also create a struct common_block
16631 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16632 is used to sepate the common blocks name namespace from regular
16636 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16638 struct attribute
*attr
;
16640 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16643 /* Support the .debug_loc offsets. */
16644 if (attr_form_is_block (attr
))
16648 else if (attr_form_is_section_offset (attr
))
16650 dwarf2_complex_location_expr_complaint ();
16655 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16656 "common block member");
16661 if (die
->child
!= NULL
)
16663 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16664 struct die_info
*child_die
;
16665 size_t n_entries
= 0, size
;
16666 struct common_block
*common_block
;
16667 struct symbol
*sym
;
16669 for (child_die
= die
->child
;
16670 child_die
&& child_die
->tag
;
16671 child_die
= sibling_die (child_die
))
16674 size
= (sizeof (struct common_block
)
16675 + (n_entries
- 1) * sizeof (struct symbol
*));
16677 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16679 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16680 common_block
->n_entries
= 0;
16682 for (child_die
= die
->child
;
16683 child_die
&& child_die
->tag
;
16684 child_die
= sibling_die (child_die
))
16686 /* Create the symbol in the DW_TAG_common_block block in the current
16688 sym
= new_symbol (child_die
, NULL
, cu
);
16691 struct attribute
*member_loc
;
16693 common_block
->contents
[common_block
->n_entries
++] = sym
;
16695 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16699 /* GDB has handled this for a long time, but it is
16700 not specified by DWARF. It seems to have been
16701 emitted by gfortran at least as recently as:
16702 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16703 complaint (&symfile_complaints
,
16704 _("Variable in common block has "
16705 "DW_AT_data_member_location "
16706 "- DIE at %s [in module %s]"),
16707 sect_offset_str (child_die
->sect_off
),
16708 objfile_name (objfile
));
16710 if (attr_form_is_section_offset (member_loc
))
16711 dwarf2_complex_location_expr_complaint ();
16712 else if (attr_form_is_constant (member_loc
)
16713 || attr_form_is_block (member_loc
))
16716 mark_common_block_symbol_computed (sym
, die
, attr
,
16720 dwarf2_complex_location_expr_complaint ();
16725 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16726 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16730 /* Create a type for a C++ namespace. */
16732 static struct type
*
16733 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16735 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16736 const char *previous_prefix
, *name
;
16740 /* For extensions, reuse the type of the original namespace. */
16741 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16743 struct die_info
*ext_die
;
16744 struct dwarf2_cu
*ext_cu
= cu
;
16746 ext_die
= dwarf2_extension (die
, &ext_cu
);
16747 type
= read_type_die (ext_die
, ext_cu
);
16749 /* EXT_CU may not be the same as CU.
16750 Ensure TYPE is recorded with CU in die_type_hash. */
16751 return set_die_type (die
, type
, cu
);
16754 name
= namespace_name (die
, &is_anonymous
, cu
);
16756 /* Now build the name of the current namespace. */
16758 previous_prefix
= determine_prefix (die
, cu
);
16759 if (previous_prefix
[0] != '\0')
16760 name
= typename_concat (&objfile
->objfile_obstack
,
16761 previous_prefix
, name
, 0, cu
);
16763 /* Create the type. */
16764 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16765 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
16767 return set_die_type (die
, type
, cu
);
16770 /* Read a namespace scope. */
16773 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16775 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16778 /* Add a symbol associated to this if we haven't seen the namespace
16779 before. Also, add a using directive if it's an anonymous
16782 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16786 type
= read_type_die (die
, cu
);
16787 new_symbol (die
, type
, cu
);
16789 namespace_name (die
, &is_anonymous
, cu
);
16792 const char *previous_prefix
= determine_prefix (die
, cu
);
16794 std::vector
<const char *> excludes
;
16795 add_using_directive (using_directives (cu
->language
),
16796 previous_prefix
, TYPE_NAME (type
), NULL
,
16797 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16801 if (die
->child
!= NULL
)
16803 struct die_info
*child_die
= die
->child
;
16805 while (child_die
&& child_die
->tag
)
16807 process_die (child_die
, cu
);
16808 child_die
= sibling_die (child_die
);
16813 /* Read a Fortran module as type. This DIE can be only a declaration used for
16814 imported module. Still we need that type as local Fortran "use ... only"
16815 declaration imports depend on the created type in determine_prefix. */
16817 static struct type
*
16818 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16820 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16821 const char *module_name
;
16824 module_name
= dwarf2_name (die
, cu
);
16826 complaint (&symfile_complaints
,
16827 _("DW_TAG_module has no name, offset %s"),
16828 sect_offset_str (die
->sect_off
));
16829 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16831 /* determine_prefix uses TYPE_TAG_NAME. */
16832 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
16834 return set_die_type (die
, type
, cu
);
16837 /* Read a Fortran module. */
16840 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16842 struct die_info
*child_die
= die
->child
;
16845 type
= read_type_die (die
, cu
);
16846 new_symbol (die
, type
, cu
);
16848 while (child_die
&& child_die
->tag
)
16850 process_die (child_die
, cu
);
16851 child_die
= sibling_die (child_die
);
16855 /* Return the name of the namespace represented by DIE. Set
16856 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16859 static const char *
16860 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16862 struct die_info
*current_die
;
16863 const char *name
= NULL
;
16865 /* Loop through the extensions until we find a name. */
16867 for (current_die
= die
;
16868 current_die
!= NULL
;
16869 current_die
= dwarf2_extension (die
, &cu
))
16871 /* We don't use dwarf2_name here so that we can detect the absence
16872 of a name -> anonymous namespace. */
16873 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16879 /* Is it an anonymous namespace? */
16881 *is_anonymous
= (name
== NULL
);
16883 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16888 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16889 the user defined type vector. */
16891 static struct type
*
16892 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16894 struct gdbarch
*gdbarch
16895 = get_objfile_arch (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16896 struct comp_unit_head
*cu_header
= &cu
->header
;
16898 struct attribute
*attr_byte_size
;
16899 struct attribute
*attr_address_class
;
16900 int byte_size
, addr_class
;
16901 struct type
*target_type
;
16903 target_type
= die_type (die
, cu
);
16905 /* The die_type call above may have already set the type for this DIE. */
16906 type
= get_die_type (die
, cu
);
16910 type
= lookup_pointer_type (target_type
);
16912 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16913 if (attr_byte_size
)
16914 byte_size
= DW_UNSND (attr_byte_size
);
16916 byte_size
= cu_header
->addr_size
;
16918 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16919 if (attr_address_class
)
16920 addr_class
= DW_UNSND (attr_address_class
);
16922 addr_class
= DW_ADDR_none
;
16924 ULONGEST alignment
= get_alignment (cu
, die
);
16926 /* If the pointer size, alignment, or address class is different
16927 than the default, create a type variant marked as such and set
16928 the length accordingly. */
16929 if (TYPE_LENGTH (type
) != byte_size
16930 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
16931 && alignment
!= TYPE_RAW_ALIGN (type
))
16932 || addr_class
!= DW_ADDR_none
)
16934 if (gdbarch_address_class_type_flags_p (gdbarch
))
16938 type_flags
= gdbarch_address_class_type_flags
16939 (gdbarch
, byte_size
, addr_class
);
16940 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16942 type
= make_type_with_address_space (type
, type_flags
);
16944 else if (TYPE_LENGTH (type
) != byte_size
)
16946 complaint (&symfile_complaints
,
16947 _("invalid pointer size %d"), byte_size
);
16949 else if (TYPE_RAW_ALIGN (type
) != alignment
)
16951 complaint (&symfile_complaints
,
16952 _("Invalid DW_AT_alignment"
16953 " - DIE at %s [in module %s]"),
16954 sect_offset_str (die
->sect_off
),
16955 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16959 /* Should we also complain about unhandled address classes? */
16963 TYPE_LENGTH (type
) = byte_size
;
16964 set_type_align (type
, alignment
);
16965 return set_die_type (die
, type
, cu
);
16968 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16969 the user defined type vector. */
16971 static struct type
*
16972 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16975 struct type
*to_type
;
16976 struct type
*domain
;
16978 to_type
= die_type (die
, cu
);
16979 domain
= die_containing_type (die
, cu
);
16981 /* The calls above may have already set the type for this DIE. */
16982 type
= get_die_type (die
, cu
);
16986 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
16987 type
= lookup_methodptr_type (to_type
);
16988 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
16990 struct type
*new_type
16991 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16993 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
16994 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
16995 TYPE_VARARGS (to_type
));
16996 type
= lookup_methodptr_type (new_type
);
16999 type
= lookup_memberptr_type (to_type
, domain
);
17001 return set_die_type (die
, type
, cu
);
17004 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
17005 the user defined type vector. */
17007 static struct type
*
17008 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17009 enum type_code refcode
)
17011 struct comp_unit_head
*cu_header
= &cu
->header
;
17012 struct type
*type
, *target_type
;
17013 struct attribute
*attr
;
17015 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
17017 target_type
= die_type (die
, cu
);
17019 /* The die_type call above may have already set the type for this DIE. */
17020 type
= get_die_type (die
, cu
);
17024 type
= lookup_reference_type (target_type
, refcode
);
17025 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17028 TYPE_LENGTH (type
) = DW_UNSND (attr
);
17032 TYPE_LENGTH (type
) = cu_header
->addr_size
;
17034 maybe_set_alignment (cu
, die
, type
);
17035 return set_die_type (die
, type
, cu
);
17038 /* Add the given cv-qualifiers to the element type of the array. GCC
17039 outputs DWARF type qualifiers that apply to an array, not the
17040 element type. But GDB relies on the array element type to carry
17041 the cv-qualifiers. This mimics section 6.7.3 of the C99
17044 static struct type
*
17045 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17046 struct type
*base_type
, int cnst
, int voltl
)
17048 struct type
*el_type
, *inner_array
;
17050 base_type
= copy_type (base_type
);
17051 inner_array
= base_type
;
17053 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
17055 TYPE_TARGET_TYPE (inner_array
) =
17056 copy_type (TYPE_TARGET_TYPE (inner_array
));
17057 inner_array
= TYPE_TARGET_TYPE (inner_array
);
17060 el_type
= TYPE_TARGET_TYPE (inner_array
);
17061 cnst
|= TYPE_CONST (el_type
);
17062 voltl
|= TYPE_VOLATILE (el_type
);
17063 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
17065 return set_die_type (die
, base_type
, cu
);
17068 static struct type
*
17069 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17071 struct type
*base_type
, *cv_type
;
17073 base_type
= die_type (die
, cu
);
17075 /* The die_type call above may have already set the type for this DIE. */
17076 cv_type
= get_die_type (die
, cu
);
17080 /* In case the const qualifier is applied to an array type, the element type
17081 is so qualified, not the array type (section 6.7.3 of C99). */
17082 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17083 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
17085 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
17086 return set_die_type (die
, cv_type
, cu
);
17089 static struct type
*
17090 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17092 struct type
*base_type
, *cv_type
;
17094 base_type
= die_type (die
, cu
);
17096 /* The die_type call above may have already set the type for this DIE. */
17097 cv_type
= get_die_type (die
, cu
);
17101 /* In case the volatile qualifier is applied to an array type, the
17102 element type is so qualified, not the array type (section 6.7.3
17104 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17105 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
17107 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
17108 return set_die_type (die
, cv_type
, cu
);
17111 /* Handle DW_TAG_restrict_type. */
17113 static struct type
*
17114 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17116 struct type
*base_type
, *cv_type
;
17118 base_type
= die_type (die
, cu
);
17120 /* The die_type call above may have already set the type for this DIE. */
17121 cv_type
= get_die_type (die
, cu
);
17125 cv_type
= make_restrict_type (base_type
);
17126 return set_die_type (die
, cv_type
, cu
);
17129 /* Handle DW_TAG_atomic_type. */
17131 static struct type
*
17132 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17134 struct type
*base_type
, *cv_type
;
17136 base_type
= die_type (die
, cu
);
17138 /* The die_type call above may have already set the type for this DIE. */
17139 cv_type
= get_die_type (die
, cu
);
17143 cv_type
= make_atomic_type (base_type
);
17144 return set_die_type (die
, cv_type
, cu
);
17147 /* Extract all information from a DW_TAG_string_type DIE and add to
17148 the user defined type vector. It isn't really a user defined type,
17149 but it behaves like one, with other DIE's using an AT_user_def_type
17150 attribute to reference it. */
17152 static struct type
*
17153 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17155 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17156 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17157 struct type
*type
, *range_type
, *index_type
, *char_type
;
17158 struct attribute
*attr
;
17159 unsigned int length
;
17161 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
17164 length
= DW_UNSND (attr
);
17168 /* Check for the DW_AT_byte_size attribute. */
17169 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17172 length
= DW_UNSND (attr
);
17180 index_type
= objfile_type (objfile
)->builtin_int
;
17181 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17182 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
17183 type
= create_string_type (NULL
, char_type
, range_type
);
17185 return set_die_type (die
, type
, cu
);
17188 /* Assuming that DIE corresponds to a function, returns nonzero
17189 if the function is prototyped. */
17192 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
17194 struct attribute
*attr
;
17196 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
17197 if (attr
&& (DW_UNSND (attr
) != 0))
17200 /* The DWARF standard implies that the DW_AT_prototyped attribute
17201 is only meaninful for C, but the concept also extends to other
17202 languages that allow unprototyped functions (Eg: Objective C).
17203 For all other languages, assume that functions are always
17205 if (cu
->language
!= language_c
17206 && cu
->language
!= language_objc
17207 && cu
->language
!= language_opencl
)
17210 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17211 prototyped and unprototyped functions; default to prototyped,
17212 since that is more common in modern code (and RealView warns
17213 about unprototyped functions). */
17214 if (producer_is_realview (cu
->producer
))
17220 /* Handle DIES due to C code like:
17224 int (*funcp)(int a, long l);
17228 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17230 static struct type
*
17231 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17233 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17234 struct type
*type
; /* Type that this function returns. */
17235 struct type
*ftype
; /* Function that returns above type. */
17236 struct attribute
*attr
;
17238 type
= die_type (die
, cu
);
17240 /* The die_type call above may have already set the type for this DIE. */
17241 ftype
= get_die_type (die
, cu
);
17245 ftype
= lookup_function_type (type
);
17247 if (prototyped_function_p (die
, cu
))
17248 TYPE_PROTOTYPED (ftype
) = 1;
17250 /* Store the calling convention in the type if it's available in
17251 the subroutine die. Otherwise set the calling convention to
17252 the default value DW_CC_normal. */
17253 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17255 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
17256 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17257 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17259 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17261 /* Record whether the function returns normally to its caller or not
17262 if the DWARF producer set that information. */
17263 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17264 if (attr
&& (DW_UNSND (attr
) != 0))
17265 TYPE_NO_RETURN (ftype
) = 1;
17267 /* We need to add the subroutine type to the die immediately so
17268 we don't infinitely recurse when dealing with parameters
17269 declared as the same subroutine type. */
17270 set_die_type (die
, ftype
, cu
);
17272 if (die
->child
!= NULL
)
17274 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17275 struct die_info
*child_die
;
17276 int nparams
, iparams
;
17278 /* Count the number of parameters.
17279 FIXME: GDB currently ignores vararg functions, but knows about
17280 vararg member functions. */
17282 child_die
= die
->child
;
17283 while (child_die
&& child_die
->tag
)
17285 if (child_die
->tag
== DW_TAG_formal_parameter
)
17287 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17288 TYPE_VARARGS (ftype
) = 1;
17289 child_die
= sibling_die (child_die
);
17292 /* Allocate storage for parameters and fill them in. */
17293 TYPE_NFIELDS (ftype
) = nparams
;
17294 TYPE_FIELDS (ftype
) = (struct field
*)
17295 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
17297 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17298 even if we error out during the parameters reading below. */
17299 for (iparams
= 0; iparams
< nparams
; iparams
++)
17300 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17303 child_die
= die
->child
;
17304 while (child_die
&& child_die
->tag
)
17306 if (child_die
->tag
== DW_TAG_formal_parameter
)
17308 struct type
*arg_type
;
17310 /* DWARF version 2 has no clean way to discern C++
17311 static and non-static member functions. G++ helps
17312 GDB by marking the first parameter for non-static
17313 member functions (which is the this pointer) as
17314 artificial. We pass this information to
17315 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17317 DWARF version 3 added DW_AT_object_pointer, which GCC
17318 4.5 does not yet generate. */
17319 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17321 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17323 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17324 arg_type
= die_type (child_die
, cu
);
17326 /* RealView does not mark THIS as const, which the testsuite
17327 expects. GCC marks THIS as const in method definitions,
17328 but not in the class specifications (GCC PR 43053). */
17329 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17330 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17333 struct dwarf2_cu
*arg_cu
= cu
;
17334 const char *name
= dwarf2_name (child_die
, cu
);
17336 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17339 /* If the compiler emits this, use it. */
17340 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17343 else if (name
&& strcmp (name
, "this") == 0)
17344 /* Function definitions will have the argument names. */
17346 else if (name
== NULL
&& iparams
== 0)
17347 /* Declarations may not have the names, so like
17348 elsewhere in GDB, assume an artificial first
17349 argument is "this". */
17353 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17357 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17360 child_die
= sibling_die (child_die
);
17367 static struct type
*
17368 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17370 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17371 const char *name
= NULL
;
17372 struct type
*this_type
, *target_type
;
17374 name
= dwarf2_full_name (NULL
, die
, cu
);
17375 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17376 TYPE_TARGET_STUB (this_type
) = 1;
17377 set_die_type (die
, this_type
, cu
);
17378 target_type
= die_type (die
, cu
);
17379 if (target_type
!= this_type
)
17380 TYPE_TARGET_TYPE (this_type
) = target_type
;
17383 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17384 spec and cause infinite loops in GDB. */
17385 complaint (&symfile_complaints
,
17386 _("Self-referential DW_TAG_typedef "
17387 "- DIE at %s [in module %s]"),
17388 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17389 TYPE_TARGET_TYPE (this_type
) = NULL
;
17394 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17395 (which may be different from NAME) to the architecture back-end to allow
17396 it to guess the correct format if necessary. */
17398 static struct type
*
17399 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17400 const char *name_hint
)
17402 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17403 const struct floatformat
**format
;
17406 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17408 type
= init_float_type (objfile
, bits
, name
, format
);
17410 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17415 /* Find a representation of a given base type and install
17416 it in the TYPE field of the die. */
17418 static struct type
*
17419 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17421 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17423 struct attribute
*attr
;
17424 int encoding
= 0, bits
= 0;
17427 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17430 encoding
= DW_UNSND (attr
);
17432 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17435 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17437 name
= dwarf2_name (die
, cu
);
17440 complaint (&symfile_complaints
,
17441 _("DW_AT_name missing from DW_TAG_base_type"));
17446 case DW_ATE_address
:
17447 /* Turn DW_ATE_address into a void * pointer. */
17448 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17449 type
= init_pointer_type (objfile
, bits
, name
, type
);
17451 case DW_ATE_boolean
:
17452 type
= init_boolean_type (objfile
, bits
, 1, name
);
17454 case DW_ATE_complex_float
:
17455 type
= dwarf2_init_float_type (objfile
, bits
/ 2, NULL
, name
);
17456 type
= init_complex_type (objfile
, name
, type
);
17458 case DW_ATE_decimal_float
:
17459 type
= init_decfloat_type (objfile
, bits
, name
);
17462 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
17464 case DW_ATE_signed
:
17465 type
= init_integer_type (objfile
, bits
, 0, name
);
17467 case DW_ATE_unsigned
:
17468 if (cu
->language
== language_fortran
17470 && startswith (name
, "character("))
17471 type
= init_character_type (objfile
, bits
, 1, name
);
17473 type
= init_integer_type (objfile
, bits
, 1, name
);
17475 case DW_ATE_signed_char
:
17476 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17477 || cu
->language
== language_pascal
17478 || cu
->language
== language_fortran
)
17479 type
= init_character_type (objfile
, bits
, 0, name
);
17481 type
= init_integer_type (objfile
, bits
, 0, name
);
17483 case DW_ATE_unsigned_char
:
17484 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17485 || cu
->language
== language_pascal
17486 || cu
->language
== language_fortran
17487 || cu
->language
== language_rust
)
17488 type
= init_character_type (objfile
, bits
, 1, name
);
17490 type
= init_integer_type (objfile
, bits
, 1, name
);
17494 gdbarch
*arch
= get_objfile_arch (objfile
);
17497 type
= builtin_type (arch
)->builtin_char16
;
17498 else if (bits
== 32)
17499 type
= builtin_type (arch
)->builtin_char32
;
17502 complaint (&symfile_complaints
,
17503 _("unsupported DW_ATE_UTF bit size: '%d'"),
17505 type
= init_integer_type (objfile
, bits
, 1, name
);
17507 return set_die_type (die
, type
, cu
);
17512 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
17513 dwarf_type_encoding_name (encoding
));
17514 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17518 if (name
&& strcmp (name
, "char") == 0)
17519 TYPE_NOSIGN (type
) = 1;
17521 maybe_set_alignment (cu
, die
, type
);
17523 return set_die_type (die
, type
, cu
);
17526 /* Parse dwarf attribute if it's a block, reference or constant and put the
17527 resulting value of the attribute into struct bound_prop.
17528 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17531 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17532 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
17534 struct dwarf2_property_baton
*baton
;
17535 struct obstack
*obstack
17536 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17538 if (attr
== NULL
|| prop
== NULL
)
17541 if (attr_form_is_block (attr
))
17543 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17544 baton
->referenced_type
= NULL
;
17545 baton
->locexpr
.per_cu
= cu
->per_cu
;
17546 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17547 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17548 prop
->data
.baton
= baton
;
17549 prop
->kind
= PROP_LOCEXPR
;
17550 gdb_assert (prop
->data
.baton
!= NULL
);
17552 else if (attr_form_is_ref (attr
))
17554 struct dwarf2_cu
*target_cu
= cu
;
17555 struct die_info
*target_die
;
17556 struct attribute
*target_attr
;
17558 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17559 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17560 if (target_attr
== NULL
)
17561 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17563 if (target_attr
== NULL
)
17566 switch (target_attr
->name
)
17568 case DW_AT_location
:
17569 if (attr_form_is_section_offset (target_attr
))
17571 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17572 baton
->referenced_type
= die_type (target_die
, target_cu
);
17573 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17574 prop
->data
.baton
= baton
;
17575 prop
->kind
= PROP_LOCLIST
;
17576 gdb_assert (prop
->data
.baton
!= NULL
);
17578 else if (attr_form_is_block (target_attr
))
17580 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17581 baton
->referenced_type
= die_type (target_die
, target_cu
);
17582 baton
->locexpr
.per_cu
= cu
->per_cu
;
17583 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17584 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17585 prop
->data
.baton
= baton
;
17586 prop
->kind
= PROP_LOCEXPR
;
17587 gdb_assert (prop
->data
.baton
!= NULL
);
17591 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17592 "dynamic property");
17596 case DW_AT_data_member_location
:
17600 if (!handle_data_member_location (target_die
, target_cu
,
17604 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17605 baton
->referenced_type
= read_type_die (target_die
->parent
,
17607 baton
->offset_info
.offset
= offset
;
17608 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17609 prop
->data
.baton
= baton
;
17610 prop
->kind
= PROP_ADDR_OFFSET
;
17615 else if (attr_form_is_constant (attr
))
17617 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
17618 prop
->kind
= PROP_CONST
;
17622 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17623 dwarf2_name (die
, cu
));
17630 /* Read the given DW_AT_subrange DIE. */
17632 static struct type
*
17633 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17635 struct type
*base_type
, *orig_base_type
;
17636 struct type
*range_type
;
17637 struct attribute
*attr
;
17638 struct dynamic_prop low
, high
;
17639 int low_default_is_valid
;
17640 int high_bound_is_count
= 0;
17642 LONGEST negative_mask
;
17644 orig_base_type
= die_type (die
, cu
);
17645 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17646 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17647 creating the range type, but we use the result of check_typedef
17648 when examining properties of the type. */
17649 base_type
= check_typedef (orig_base_type
);
17651 /* The die_type call above may have already set the type for this DIE. */
17652 range_type
= get_die_type (die
, cu
);
17656 low
.kind
= PROP_CONST
;
17657 high
.kind
= PROP_CONST
;
17658 high
.data
.const_val
= 0;
17660 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17661 omitting DW_AT_lower_bound. */
17662 switch (cu
->language
)
17665 case language_cplus
:
17666 low
.data
.const_val
= 0;
17667 low_default_is_valid
= 1;
17669 case language_fortran
:
17670 low
.data
.const_val
= 1;
17671 low_default_is_valid
= 1;
17674 case language_objc
:
17675 case language_rust
:
17676 low
.data
.const_val
= 0;
17677 low_default_is_valid
= (cu
->header
.version
>= 4);
17681 case language_pascal
:
17682 low
.data
.const_val
= 1;
17683 low_default_is_valid
= (cu
->header
.version
>= 4);
17686 low
.data
.const_val
= 0;
17687 low_default_is_valid
= 0;
17691 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17693 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
17694 else if (!low_default_is_valid
)
17695 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
17696 "- DIE at %s [in module %s]"),
17697 sect_offset_str (die
->sect_off
),
17698 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17700 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17701 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17703 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
17704 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17706 /* If bounds are constant do the final calculation here. */
17707 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17708 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17710 high_bound_is_count
= 1;
17714 /* Dwarf-2 specifications explicitly allows to create subrange types
17715 without specifying a base type.
17716 In that case, the base type must be set to the type of
17717 the lower bound, upper bound or count, in that order, if any of these
17718 three attributes references an object that has a type.
17719 If no base type is found, the Dwarf-2 specifications say that
17720 a signed integer type of size equal to the size of an address should
17722 For the following C code: `extern char gdb_int [];'
17723 GCC produces an empty range DIE.
17724 FIXME: muller/2010-05-28: Possible references to object for low bound,
17725 high bound or count are not yet handled by this code. */
17726 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
17728 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17729 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17730 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
17731 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
17733 /* Test "int", "long int", and "long long int" objfile types,
17734 and select the first one having a size above or equal to the
17735 architecture address size. */
17736 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17737 base_type
= int_type
;
17740 int_type
= objfile_type (objfile
)->builtin_long
;
17741 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17742 base_type
= int_type
;
17745 int_type
= objfile_type (objfile
)->builtin_long_long
;
17746 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17747 base_type
= int_type
;
17752 /* Normally, the DWARF producers are expected to use a signed
17753 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17754 But this is unfortunately not always the case, as witnessed
17755 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17756 is used instead. To work around that ambiguity, we treat
17757 the bounds as signed, and thus sign-extend their values, when
17758 the base type is signed. */
17760 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17761 if (low
.kind
== PROP_CONST
17762 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17763 low
.data
.const_val
|= negative_mask
;
17764 if (high
.kind
== PROP_CONST
17765 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17766 high
.data
.const_val
|= negative_mask
;
17768 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
17770 if (high_bound_is_count
)
17771 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17773 /* Ada expects an empty array on no boundary attributes. */
17774 if (attr
== NULL
&& cu
->language
!= language_ada
)
17775 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17777 name
= dwarf2_name (die
, cu
);
17779 TYPE_NAME (range_type
) = name
;
17781 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17783 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17785 maybe_set_alignment (cu
, die
, range_type
);
17787 set_die_type (die
, range_type
, cu
);
17789 /* set_die_type should be already done. */
17790 set_descriptive_type (range_type
, die
, cu
);
17795 static struct type
*
17796 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17800 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
17802 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
17804 /* In Ada, an unspecified type is typically used when the description
17805 of the type is defered to a different unit. When encountering
17806 such a type, we treat it as a stub, and try to resolve it later on,
17808 if (cu
->language
== language_ada
)
17809 TYPE_STUB (type
) = 1;
17811 return set_die_type (die
, type
, cu
);
17814 /* Read a single die and all its descendents. Set the die's sibling
17815 field to NULL; set other fields in the die correctly, and set all
17816 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17817 location of the info_ptr after reading all of those dies. PARENT
17818 is the parent of the die in question. */
17820 static struct die_info
*
17821 read_die_and_children (const struct die_reader_specs
*reader
,
17822 const gdb_byte
*info_ptr
,
17823 const gdb_byte
**new_info_ptr
,
17824 struct die_info
*parent
)
17826 struct die_info
*die
;
17827 const gdb_byte
*cur_ptr
;
17830 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
17833 *new_info_ptr
= cur_ptr
;
17836 store_in_ref_table (die
, reader
->cu
);
17839 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17843 *new_info_ptr
= cur_ptr
;
17846 die
->sibling
= NULL
;
17847 die
->parent
= parent
;
17851 /* Read a die, all of its descendents, and all of its siblings; set
17852 all of the fields of all of the dies correctly. Arguments are as
17853 in read_die_and_children. */
17855 static struct die_info
*
17856 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17857 const gdb_byte
*info_ptr
,
17858 const gdb_byte
**new_info_ptr
,
17859 struct die_info
*parent
)
17861 struct die_info
*first_die
, *last_sibling
;
17862 const gdb_byte
*cur_ptr
;
17864 cur_ptr
= info_ptr
;
17865 first_die
= last_sibling
= NULL
;
17869 struct die_info
*die
17870 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17874 *new_info_ptr
= cur_ptr
;
17881 last_sibling
->sibling
= die
;
17883 last_sibling
= die
;
17887 /* Read a die, all of its descendents, and all of its siblings; set
17888 all of the fields of all of the dies correctly. Arguments are as
17889 in read_die_and_children.
17890 This the main entry point for reading a DIE and all its children. */
17892 static struct die_info
*
17893 read_die_and_siblings (const struct die_reader_specs
*reader
,
17894 const gdb_byte
*info_ptr
,
17895 const gdb_byte
**new_info_ptr
,
17896 struct die_info
*parent
)
17898 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17899 new_info_ptr
, parent
);
17901 if (dwarf_die_debug
)
17903 fprintf_unfiltered (gdb_stdlog
,
17904 "Read die from %s@0x%x of %s:\n",
17905 get_section_name (reader
->die_section
),
17906 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17907 bfd_get_filename (reader
->abfd
));
17908 dump_die (die
, dwarf_die_debug
);
17914 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
17916 The caller is responsible for filling in the extra attributes
17917 and updating (*DIEP)->num_attrs.
17918 Set DIEP to point to a newly allocated die with its information,
17919 except for its child, sibling, and parent fields.
17920 Set HAS_CHILDREN to tell whether the die has children or not. */
17922 static const gdb_byte
*
17923 read_full_die_1 (const struct die_reader_specs
*reader
,
17924 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17925 int *has_children
, int num_extra_attrs
)
17927 unsigned int abbrev_number
, bytes_read
, i
;
17928 struct abbrev_info
*abbrev
;
17929 struct die_info
*die
;
17930 struct dwarf2_cu
*cu
= reader
->cu
;
17931 bfd
*abfd
= reader
->abfd
;
17933 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
17934 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17935 info_ptr
+= bytes_read
;
17936 if (!abbrev_number
)
17943 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
17945 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
17947 bfd_get_filename (abfd
));
17949 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
17950 die
->sect_off
= sect_off
;
17951 die
->tag
= abbrev
->tag
;
17952 die
->abbrev
= abbrev_number
;
17954 /* Make the result usable.
17955 The caller needs to update num_attrs after adding the extra
17957 die
->num_attrs
= abbrev
->num_attrs
;
17959 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
17960 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
17964 *has_children
= abbrev
->has_children
;
17968 /* Read a die and all its attributes.
17969 Set DIEP to point to a newly allocated die with its information,
17970 except for its child, sibling, and parent fields.
17971 Set HAS_CHILDREN to tell whether the die has children or not. */
17973 static const gdb_byte
*
17974 read_full_die (const struct die_reader_specs
*reader
,
17975 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17978 const gdb_byte
*result
;
17980 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
17982 if (dwarf_die_debug
)
17984 fprintf_unfiltered (gdb_stdlog
,
17985 "Read die from %s@0x%x of %s:\n",
17986 get_section_name (reader
->die_section
),
17987 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17988 bfd_get_filename (reader
->abfd
));
17989 dump_die (*diep
, dwarf_die_debug
);
17995 /* Abbreviation tables.
17997 In DWARF version 2, the description of the debugging information is
17998 stored in a separate .debug_abbrev section. Before we read any
17999 dies from a section we read in all abbreviations and install them
18000 in a hash table. */
18002 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
18004 struct abbrev_info
*
18005 abbrev_table::alloc_abbrev ()
18007 struct abbrev_info
*abbrev
;
18009 abbrev
= XOBNEW (&abbrev_obstack
, struct abbrev_info
);
18010 memset (abbrev
, 0, sizeof (struct abbrev_info
));
18015 /* Add an abbreviation to the table. */
18018 abbrev_table::add_abbrev (unsigned int abbrev_number
,
18019 struct abbrev_info
*abbrev
)
18021 unsigned int hash_number
;
18023 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18024 abbrev
->next
= m_abbrevs
[hash_number
];
18025 m_abbrevs
[hash_number
] = abbrev
;
18028 /* Look up an abbrev in the table.
18029 Returns NULL if the abbrev is not found. */
18031 struct abbrev_info
*
18032 abbrev_table::lookup_abbrev (unsigned int abbrev_number
)
18034 unsigned int hash_number
;
18035 struct abbrev_info
*abbrev
;
18037 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18038 abbrev
= m_abbrevs
[hash_number
];
18042 if (abbrev
->number
== abbrev_number
)
18044 abbrev
= abbrev
->next
;
18049 /* Read in an abbrev table. */
18051 static abbrev_table_up
18052 abbrev_table_read_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
18053 struct dwarf2_section_info
*section
,
18054 sect_offset sect_off
)
18056 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18057 bfd
*abfd
= get_section_bfd_owner (section
);
18058 const gdb_byte
*abbrev_ptr
;
18059 struct abbrev_info
*cur_abbrev
;
18060 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
18061 unsigned int abbrev_form
;
18062 struct attr_abbrev
*cur_attrs
;
18063 unsigned int allocated_attrs
;
18065 abbrev_table_up
abbrev_table (new struct abbrev_table (sect_off
));
18067 dwarf2_read_section (objfile
, section
);
18068 abbrev_ptr
= section
->buffer
+ to_underlying (sect_off
);
18069 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18070 abbrev_ptr
+= bytes_read
;
18072 allocated_attrs
= ATTR_ALLOC_CHUNK
;
18073 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
18075 /* Loop until we reach an abbrev number of 0. */
18076 while (abbrev_number
)
18078 cur_abbrev
= abbrev_table
->alloc_abbrev ();
18080 /* read in abbrev header */
18081 cur_abbrev
->number
= abbrev_number
;
18083 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18084 abbrev_ptr
+= bytes_read
;
18085 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
18088 /* now read in declarations */
18091 LONGEST implicit_const
;
18093 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18094 abbrev_ptr
+= bytes_read
;
18095 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18096 abbrev_ptr
+= bytes_read
;
18097 if (abbrev_form
== DW_FORM_implicit_const
)
18099 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
18101 abbrev_ptr
+= bytes_read
;
18105 /* Initialize it due to a false compiler warning. */
18106 implicit_const
= -1;
18109 if (abbrev_name
== 0)
18112 if (cur_abbrev
->num_attrs
== allocated_attrs
)
18114 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
18116 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
18119 cur_attrs
[cur_abbrev
->num_attrs
].name
18120 = (enum dwarf_attribute
) abbrev_name
;
18121 cur_attrs
[cur_abbrev
->num_attrs
].form
18122 = (enum dwarf_form
) abbrev_form
;
18123 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
18124 ++cur_abbrev
->num_attrs
;
18127 cur_abbrev
->attrs
=
18128 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
18129 cur_abbrev
->num_attrs
);
18130 memcpy (cur_abbrev
->attrs
, cur_attrs
,
18131 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
18133 abbrev_table
->add_abbrev (abbrev_number
, cur_abbrev
);
18135 /* Get next abbreviation.
18136 Under Irix6 the abbreviations for a compilation unit are not
18137 always properly terminated with an abbrev number of 0.
18138 Exit loop if we encounter an abbreviation which we have
18139 already read (which means we are about to read the abbreviations
18140 for the next compile unit) or if the end of the abbreviation
18141 table is reached. */
18142 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
18144 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18145 abbrev_ptr
+= bytes_read
;
18146 if (abbrev_table
->lookup_abbrev (abbrev_number
) != NULL
)
18151 return abbrev_table
;
18154 /* Returns nonzero if TAG represents a type that we might generate a partial
18158 is_type_tag_for_partial (int tag
)
18163 /* Some types that would be reasonable to generate partial symbols for,
18164 that we don't at present. */
18165 case DW_TAG_array_type
:
18166 case DW_TAG_file_type
:
18167 case DW_TAG_ptr_to_member_type
:
18168 case DW_TAG_set_type
:
18169 case DW_TAG_string_type
:
18170 case DW_TAG_subroutine_type
:
18172 case DW_TAG_base_type
:
18173 case DW_TAG_class_type
:
18174 case DW_TAG_interface_type
:
18175 case DW_TAG_enumeration_type
:
18176 case DW_TAG_structure_type
:
18177 case DW_TAG_subrange_type
:
18178 case DW_TAG_typedef
:
18179 case DW_TAG_union_type
:
18186 /* Load all DIEs that are interesting for partial symbols into memory. */
18188 static struct partial_die_info
*
18189 load_partial_dies (const struct die_reader_specs
*reader
,
18190 const gdb_byte
*info_ptr
, int building_psymtab
)
18192 struct dwarf2_cu
*cu
= reader
->cu
;
18193 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18194 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18195 unsigned int bytes_read
;
18196 unsigned int load_all
= 0;
18197 int nesting_level
= 1;
18202 gdb_assert (cu
->per_cu
!= NULL
);
18203 if (cu
->per_cu
->load_all_dies
)
18207 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18211 &cu
->comp_unit_obstack
,
18212 hashtab_obstack_allocate
,
18213 dummy_obstack_deallocate
);
18217 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18219 /* A NULL abbrev means the end of a series of children. */
18220 if (abbrev
== NULL
)
18222 if (--nesting_level
== 0)
18225 info_ptr
+= bytes_read
;
18226 last_die
= parent_die
;
18227 parent_die
= parent_die
->die_parent
;
18231 /* Check for template arguments. We never save these; if
18232 they're seen, we just mark the parent, and go on our way. */
18233 if (parent_die
!= NULL
18234 && cu
->language
== language_cplus
18235 && (abbrev
->tag
== DW_TAG_template_type_param
18236 || abbrev
->tag
== DW_TAG_template_value_param
))
18238 parent_die
->has_template_arguments
= 1;
18242 /* We don't need a partial DIE for the template argument. */
18243 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18248 /* We only recurse into c++ subprograms looking for template arguments.
18249 Skip their other children. */
18251 && cu
->language
== language_cplus
18252 && parent_die
!= NULL
18253 && parent_die
->tag
== DW_TAG_subprogram
)
18255 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18259 /* Check whether this DIE is interesting enough to save. Normally
18260 we would not be interested in members here, but there may be
18261 later variables referencing them via DW_AT_specification (for
18262 static members). */
18264 && !is_type_tag_for_partial (abbrev
->tag
)
18265 && abbrev
->tag
!= DW_TAG_constant
18266 && abbrev
->tag
!= DW_TAG_enumerator
18267 && abbrev
->tag
!= DW_TAG_subprogram
18268 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18269 && abbrev
->tag
!= DW_TAG_lexical_block
18270 && abbrev
->tag
!= DW_TAG_variable
18271 && abbrev
->tag
!= DW_TAG_namespace
18272 && abbrev
->tag
!= DW_TAG_module
18273 && abbrev
->tag
!= DW_TAG_member
18274 && abbrev
->tag
!= DW_TAG_imported_unit
18275 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18277 /* Otherwise we skip to the next sibling, if any. */
18278 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18282 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18285 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18287 /* This two-pass algorithm for processing partial symbols has a
18288 high cost in cache pressure. Thus, handle some simple cases
18289 here which cover the majority of C partial symbols. DIEs
18290 which neither have specification tags in them, nor could have
18291 specification tags elsewhere pointing at them, can simply be
18292 processed and discarded.
18294 This segment is also optional; scan_partial_symbols and
18295 add_partial_symbol will handle these DIEs if we chain
18296 them in normally. When compilers which do not emit large
18297 quantities of duplicate debug information are more common,
18298 this code can probably be removed. */
18300 /* Any complete simple types at the top level (pretty much all
18301 of them, for a language without namespaces), can be processed
18303 if (parent_die
== NULL
18304 && pdi
.has_specification
== 0
18305 && pdi
.is_declaration
== 0
18306 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18307 || pdi
.tag
== DW_TAG_base_type
18308 || pdi
.tag
== DW_TAG_subrange_type
))
18310 if (building_psymtab
&& pdi
.name
!= NULL
)
18311 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18312 VAR_DOMAIN
, LOC_TYPEDEF
,
18313 &objfile
->static_psymbols
,
18314 0, cu
->language
, objfile
);
18315 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18319 /* The exception for DW_TAG_typedef with has_children above is
18320 a workaround of GCC PR debug/47510. In the case of this complaint
18321 type_name_no_tag_or_error will error on such types later.
18323 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18324 it could not find the child DIEs referenced later, this is checked
18325 above. In correct DWARF DW_TAG_typedef should have no children. */
18327 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18328 complaint (&symfile_complaints
,
18329 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18330 "- DIE at %s [in module %s]"),
18331 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18333 /* If we're at the second level, and we're an enumerator, and
18334 our parent has no specification (meaning possibly lives in a
18335 namespace elsewhere), then we can add the partial symbol now
18336 instead of queueing it. */
18337 if (pdi
.tag
== DW_TAG_enumerator
18338 && parent_die
!= NULL
18339 && parent_die
->die_parent
== NULL
18340 && parent_die
->tag
== DW_TAG_enumeration_type
18341 && parent_die
->has_specification
== 0)
18343 if (pdi
.name
== NULL
)
18344 complaint (&symfile_complaints
,
18345 _("malformed enumerator DIE ignored"));
18346 else if (building_psymtab
)
18347 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18348 VAR_DOMAIN
, LOC_CONST
,
18349 cu
->language
== language_cplus
18350 ? &objfile
->global_psymbols
18351 : &objfile
->static_psymbols
,
18352 0, cu
->language
, objfile
);
18354 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18358 struct partial_die_info
*part_die
18359 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18361 /* We'll save this DIE so link it in. */
18362 part_die
->die_parent
= parent_die
;
18363 part_die
->die_sibling
= NULL
;
18364 part_die
->die_child
= NULL
;
18366 if (last_die
&& last_die
== parent_die
)
18367 last_die
->die_child
= part_die
;
18369 last_die
->die_sibling
= part_die
;
18371 last_die
= part_die
;
18373 if (first_die
== NULL
)
18374 first_die
= part_die
;
18376 /* Maybe add the DIE to the hash table. Not all DIEs that we
18377 find interesting need to be in the hash table, because we
18378 also have the parent/sibling/child chains; only those that we
18379 might refer to by offset later during partial symbol reading.
18381 For now this means things that might have be the target of a
18382 DW_AT_specification, DW_AT_abstract_origin, or
18383 DW_AT_extension. DW_AT_extension will refer only to
18384 namespaces; DW_AT_abstract_origin refers to functions (and
18385 many things under the function DIE, but we do not recurse
18386 into function DIEs during partial symbol reading) and
18387 possibly variables as well; DW_AT_specification refers to
18388 declarations. Declarations ought to have the DW_AT_declaration
18389 flag. It happens that GCC forgets to put it in sometimes, but
18390 only for functions, not for types.
18392 Adding more things than necessary to the hash table is harmless
18393 except for the performance cost. Adding too few will result in
18394 wasted time in find_partial_die, when we reread the compilation
18395 unit with load_all_dies set. */
18398 || abbrev
->tag
== DW_TAG_constant
18399 || abbrev
->tag
== DW_TAG_subprogram
18400 || abbrev
->tag
== DW_TAG_variable
18401 || abbrev
->tag
== DW_TAG_namespace
18402 || part_die
->is_declaration
)
18406 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18407 to_underlying (part_die
->sect_off
),
18412 /* For some DIEs we want to follow their children (if any). For C
18413 we have no reason to follow the children of structures; for other
18414 languages we have to, so that we can get at method physnames
18415 to infer fully qualified class names, for DW_AT_specification,
18416 and for C++ template arguments. For C++, we also look one level
18417 inside functions to find template arguments (if the name of the
18418 function does not already contain the template arguments).
18420 For Ada, we need to scan the children of subprograms and lexical
18421 blocks as well because Ada allows the definition of nested
18422 entities that could be interesting for the debugger, such as
18423 nested subprograms for instance. */
18424 if (last_die
->has_children
18426 || last_die
->tag
== DW_TAG_namespace
18427 || last_die
->tag
== DW_TAG_module
18428 || last_die
->tag
== DW_TAG_enumeration_type
18429 || (cu
->language
== language_cplus
18430 && last_die
->tag
== DW_TAG_subprogram
18431 && (last_die
->name
== NULL
18432 || strchr (last_die
->name
, '<') == NULL
))
18433 || (cu
->language
!= language_c
18434 && (last_die
->tag
== DW_TAG_class_type
18435 || last_die
->tag
== DW_TAG_interface_type
18436 || last_die
->tag
== DW_TAG_structure_type
18437 || last_die
->tag
== DW_TAG_union_type
))
18438 || (cu
->language
== language_ada
18439 && (last_die
->tag
== DW_TAG_subprogram
18440 || last_die
->tag
== DW_TAG_lexical_block
))))
18443 parent_die
= last_die
;
18447 /* Otherwise we skip to the next sibling, if any. */
18448 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18450 /* Back to the top, do it again. */
18454 partial_die_info::partial_die_info (sect_offset sect_off_
,
18455 struct abbrev_info
*abbrev
)
18456 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18460 /* Read a minimal amount of information into the minimal die structure.
18461 INFO_PTR should point just after the initial uleb128 of a DIE. */
18464 partial_die_info::read (const struct die_reader_specs
*reader
,
18465 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18467 struct dwarf2_cu
*cu
= reader
->cu
;
18468 struct dwarf2_per_objfile
*dwarf2_per_objfile
18469 = cu
->per_cu
->dwarf2_per_objfile
;
18471 int has_low_pc_attr
= 0;
18472 int has_high_pc_attr
= 0;
18473 int high_pc_relative
= 0;
18475 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18477 struct attribute attr
;
18479 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
], info_ptr
);
18481 /* Store the data if it is of an attribute we want to keep in a
18482 partial symbol table. */
18488 case DW_TAG_compile_unit
:
18489 case DW_TAG_partial_unit
:
18490 case DW_TAG_type_unit
:
18491 /* Compilation units have a DW_AT_name that is a filename, not
18492 a source language identifier. */
18493 case DW_TAG_enumeration_type
:
18494 case DW_TAG_enumerator
:
18495 /* These tags always have simple identifiers already; no need
18496 to canonicalize them. */
18497 name
= DW_STRING (&attr
);
18501 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18504 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
18505 &objfile
->per_bfd
->storage_obstack
);
18510 case DW_AT_linkage_name
:
18511 case DW_AT_MIPS_linkage_name
:
18512 /* Note that both forms of linkage name might appear. We
18513 assume they will be the same, and we only store the last
18515 if (cu
->language
== language_ada
)
18516 name
= DW_STRING (&attr
);
18517 linkage_name
= DW_STRING (&attr
);
18520 has_low_pc_attr
= 1;
18521 lowpc
= attr_value_as_address (&attr
);
18523 case DW_AT_high_pc
:
18524 has_high_pc_attr
= 1;
18525 highpc
= attr_value_as_address (&attr
);
18526 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
18527 high_pc_relative
= 1;
18529 case DW_AT_location
:
18530 /* Support the .debug_loc offsets. */
18531 if (attr_form_is_block (&attr
))
18533 d
.locdesc
= DW_BLOCK (&attr
);
18535 else if (attr_form_is_section_offset (&attr
))
18537 dwarf2_complex_location_expr_complaint ();
18541 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18542 "partial symbol information");
18545 case DW_AT_external
:
18546 is_external
= DW_UNSND (&attr
);
18548 case DW_AT_declaration
:
18549 is_declaration
= DW_UNSND (&attr
);
18554 case DW_AT_abstract_origin
:
18555 case DW_AT_specification
:
18556 case DW_AT_extension
:
18557 has_specification
= 1;
18558 spec_offset
= dwarf2_get_ref_die_offset (&attr
);
18559 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18560 || cu
->per_cu
->is_dwz
);
18562 case DW_AT_sibling
:
18563 /* Ignore absolute siblings, they might point outside of
18564 the current compile unit. */
18565 if (attr
.form
== DW_FORM_ref_addr
)
18566 complaint (&symfile_complaints
,
18567 _("ignoring absolute DW_AT_sibling"));
18570 const gdb_byte
*buffer
= reader
->buffer
;
18571 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
18572 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18574 if (sibling_ptr
< info_ptr
)
18575 complaint (&symfile_complaints
,
18576 _("DW_AT_sibling points backwards"));
18577 else if (sibling_ptr
> reader
->buffer_end
)
18578 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
18580 sibling
= sibling_ptr
;
18583 case DW_AT_byte_size
:
18586 case DW_AT_const_value
:
18587 has_const_value
= 1;
18589 case DW_AT_calling_convention
:
18590 /* DWARF doesn't provide a way to identify a program's source-level
18591 entry point. DW_AT_calling_convention attributes are only meant
18592 to describe functions' calling conventions.
18594 However, because it's a necessary piece of information in
18595 Fortran, and before DWARF 4 DW_CC_program was the only
18596 piece of debugging information whose definition refers to
18597 a 'main program' at all, several compilers marked Fortran
18598 main programs with DW_CC_program --- even when those
18599 functions use the standard calling conventions.
18601 Although DWARF now specifies a way to provide this
18602 information, we support this practice for backward
18604 if (DW_UNSND (&attr
) == DW_CC_program
18605 && cu
->language
== language_fortran
)
18606 main_subprogram
= 1;
18609 if (DW_UNSND (&attr
) == DW_INL_inlined
18610 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18611 may_be_inlined
= 1;
18615 if (tag
== DW_TAG_imported_unit
)
18617 d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
18618 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18619 || cu
->per_cu
->is_dwz
);
18623 case DW_AT_main_subprogram
:
18624 main_subprogram
= DW_UNSND (&attr
);
18632 if (high_pc_relative
)
18635 if (has_low_pc_attr
&& has_high_pc_attr
)
18637 /* When using the GNU linker, .gnu.linkonce. sections are used to
18638 eliminate duplicate copies of functions and vtables and such.
18639 The linker will arbitrarily choose one and discard the others.
18640 The AT_*_pc values for such functions refer to local labels in
18641 these sections. If the section from that file was discarded, the
18642 labels are not in the output, so the relocs get a value of 0.
18643 If this is a discarded function, mark the pc bounds as invalid,
18644 so that GDB will ignore it. */
18645 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18647 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18648 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18650 complaint (&symfile_complaints
,
18651 _("DW_AT_low_pc %s is zero "
18652 "for DIE at %s [in module %s]"),
18653 paddress (gdbarch
, lowpc
),
18654 sect_offset_str (sect_off
),
18655 objfile_name (objfile
));
18657 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18658 else if (lowpc
>= highpc
)
18660 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18661 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18663 complaint (&symfile_complaints
,
18664 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18665 "for DIE at %s [in module %s]"),
18666 paddress (gdbarch
, lowpc
),
18667 paddress (gdbarch
, highpc
),
18668 sect_offset_str (sect_off
),
18669 objfile_name (objfile
));
18678 /* Find a cached partial DIE at OFFSET in CU. */
18680 struct partial_die_info
*
18681 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18683 struct partial_die_info
*lookup_die
= NULL
;
18684 struct partial_die_info
part_die (sect_off
);
18686 lookup_die
= ((struct partial_die_info
*)
18687 htab_find_with_hash (partial_dies
, &part_die
,
18688 to_underlying (sect_off
)));
18693 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18694 except in the case of .debug_types DIEs which do not reference
18695 outside their CU (they do however referencing other types via
18696 DW_FORM_ref_sig8). */
18698 static struct partial_die_info
*
18699 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18701 struct dwarf2_per_objfile
*dwarf2_per_objfile
18702 = cu
->per_cu
->dwarf2_per_objfile
;
18703 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18704 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18705 struct partial_die_info
*pd
= NULL
;
18707 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18708 && offset_in_cu_p (&cu
->header
, sect_off
))
18710 pd
= cu
->find_partial_die (sect_off
);
18713 /* We missed recording what we needed.
18714 Load all dies and try again. */
18715 per_cu
= cu
->per_cu
;
18719 /* TUs don't reference other CUs/TUs (except via type signatures). */
18720 if (cu
->per_cu
->is_debug_types
)
18722 error (_("Dwarf Error: Type Unit at offset %s contains"
18723 " external reference to offset %s [in module %s].\n"),
18724 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18725 bfd_get_filename (objfile
->obfd
));
18727 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18728 dwarf2_per_objfile
);
18730 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18731 load_partial_comp_unit (per_cu
);
18733 per_cu
->cu
->last_used
= 0;
18734 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18737 /* If we didn't find it, and not all dies have been loaded,
18738 load them all and try again. */
18740 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18742 per_cu
->load_all_dies
= 1;
18744 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18745 THIS_CU->cu may already be in use. So we can't just free it and
18746 replace its DIEs with the ones we read in. Instead, we leave those
18747 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18748 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18750 load_partial_comp_unit (per_cu
);
18752 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18756 internal_error (__FILE__
, __LINE__
,
18757 _("could not find partial DIE %s "
18758 "in cache [from module %s]\n"),
18759 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18763 /* See if we can figure out if the class lives in a namespace. We do
18764 this by looking for a member function; its demangled name will
18765 contain namespace info, if there is any. */
18768 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18769 struct dwarf2_cu
*cu
)
18771 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18772 what template types look like, because the demangler
18773 frequently doesn't give the same name as the debug info. We
18774 could fix this by only using the demangled name to get the
18775 prefix (but see comment in read_structure_type). */
18777 struct partial_die_info
*real_pdi
;
18778 struct partial_die_info
*child_pdi
;
18780 /* If this DIE (this DIE's specification, if any) has a parent, then
18781 we should not do this. We'll prepend the parent's fully qualified
18782 name when we create the partial symbol. */
18784 real_pdi
= struct_pdi
;
18785 while (real_pdi
->has_specification
)
18786 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
18787 real_pdi
->spec_is_dwz
, cu
);
18789 if (real_pdi
->die_parent
!= NULL
)
18792 for (child_pdi
= struct_pdi
->die_child
;
18794 child_pdi
= child_pdi
->die_sibling
)
18796 if (child_pdi
->tag
== DW_TAG_subprogram
18797 && child_pdi
->linkage_name
!= NULL
)
18799 char *actual_class_name
18800 = language_class_name_from_physname (cu
->language_defn
,
18801 child_pdi
->linkage_name
);
18802 if (actual_class_name
!= NULL
)
18804 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18807 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
18809 strlen (actual_class_name
)));
18810 xfree (actual_class_name
);
18818 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18820 /* Once we've fixed up a die, there's no point in doing so again.
18821 This also avoids a memory leak if we were to call
18822 guess_partial_die_structure_name multiple times. */
18826 /* If we found a reference attribute and the DIE has no name, try
18827 to find a name in the referred to DIE. */
18829 if (name
== NULL
&& has_specification
)
18831 struct partial_die_info
*spec_die
;
18833 spec_die
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18835 spec_die
->fixup (cu
);
18837 if (spec_die
->name
)
18839 name
= spec_die
->name
;
18841 /* Copy DW_AT_external attribute if it is set. */
18842 if (spec_die
->is_external
)
18843 is_external
= spec_die
->is_external
;
18847 /* Set default names for some unnamed DIEs. */
18849 if (name
== NULL
&& tag
== DW_TAG_namespace
)
18850 name
= CP_ANONYMOUS_NAMESPACE_STR
;
18852 /* If there is no parent die to provide a namespace, and there are
18853 children, see if we can determine the namespace from their linkage
18855 if (cu
->language
== language_cplus
18856 && !VEC_empty (dwarf2_section_info_def
,
18857 cu
->per_cu
->dwarf2_per_objfile
->types
)
18858 && die_parent
== NULL
18860 && (tag
== DW_TAG_class_type
18861 || tag
== DW_TAG_structure_type
18862 || tag
== DW_TAG_union_type
))
18863 guess_partial_die_structure_name (this, cu
);
18865 /* GCC might emit a nameless struct or union that has a linkage
18866 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18868 && (tag
== DW_TAG_class_type
18869 || tag
== DW_TAG_interface_type
18870 || tag
== DW_TAG_structure_type
18871 || tag
== DW_TAG_union_type
)
18872 && linkage_name
!= NULL
)
18876 demangled
= gdb_demangle (linkage_name
, DMGL_TYPES
);
18881 /* Strip any leading namespaces/classes, keep only the base name.
18882 DW_AT_name for named DIEs does not contain the prefixes. */
18883 base
= strrchr (demangled
, ':');
18884 if (base
&& base
> demangled
&& base
[-1] == ':')
18889 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18892 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
18893 base
, strlen (base
)));
18901 /* Read an attribute value described by an attribute form. */
18903 static const gdb_byte
*
18904 read_attribute_value (const struct die_reader_specs
*reader
,
18905 struct attribute
*attr
, unsigned form
,
18906 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
18908 struct dwarf2_cu
*cu
= reader
->cu
;
18909 struct dwarf2_per_objfile
*dwarf2_per_objfile
18910 = cu
->per_cu
->dwarf2_per_objfile
;
18911 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18912 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18913 bfd
*abfd
= reader
->abfd
;
18914 struct comp_unit_head
*cu_header
= &cu
->header
;
18915 unsigned int bytes_read
;
18916 struct dwarf_block
*blk
;
18918 attr
->form
= (enum dwarf_form
) form
;
18921 case DW_FORM_ref_addr
:
18922 if (cu
->header
.version
== 2)
18923 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18925 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
18926 &cu
->header
, &bytes_read
);
18927 info_ptr
+= bytes_read
;
18929 case DW_FORM_GNU_ref_alt
:
18930 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18931 info_ptr
+= bytes_read
;
18934 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18935 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
18936 info_ptr
+= bytes_read
;
18938 case DW_FORM_block2
:
18939 blk
= dwarf_alloc_block (cu
);
18940 blk
->size
= read_2_bytes (abfd
, info_ptr
);
18942 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18943 info_ptr
+= blk
->size
;
18944 DW_BLOCK (attr
) = blk
;
18946 case DW_FORM_block4
:
18947 blk
= dwarf_alloc_block (cu
);
18948 blk
->size
= read_4_bytes (abfd
, info_ptr
);
18950 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18951 info_ptr
+= blk
->size
;
18952 DW_BLOCK (attr
) = blk
;
18954 case DW_FORM_data2
:
18955 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
18958 case DW_FORM_data4
:
18959 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
18962 case DW_FORM_data8
:
18963 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
18966 case DW_FORM_data16
:
18967 blk
= dwarf_alloc_block (cu
);
18969 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
18971 DW_BLOCK (attr
) = blk
;
18973 case DW_FORM_sec_offset
:
18974 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18975 info_ptr
+= bytes_read
;
18977 case DW_FORM_string
:
18978 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
18979 DW_STRING_IS_CANONICAL (attr
) = 0;
18980 info_ptr
+= bytes_read
;
18983 if (!cu
->per_cu
->is_dwz
)
18985 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
18986 abfd
, info_ptr
, cu_header
,
18988 DW_STRING_IS_CANONICAL (attr
) = 0;
18989 info_ptr
+= bytes_read
;
18993 case DW_FORM_line_strp
:
18994 if (!cu
->per_cu
->is_dwz
)
18996 DW_STRING (attr
) = read_indirect_line_string (dwarf2_per_objfile
,
18998 cu_header
, &bytes_read
);
18999 DW_STRING_IS_CANONICAL (attr
) = 0;
19000 info_ptr
+= bytes_read
;
19004 case DW_FORM_GNU_strp_alt
:
19006 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19007 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
19010 DW_STRING (attr
) = read_indirect_string_from_dwz (objfile
,
19012 DW_STRING_IS_CANONICAL (attr
) = 0;
19013 info_ptr
+= bytes_read
;
19016 case DW_FORM_exprloc
:
19017 case DW_FORM_block
:
19018 blk
= dwarf_alloc_block (cu
);
19019 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19020 info_ptr
+= bytes_read
;
19021 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19022 info_ptr
+= blk
->size
;
19023 DW_BLOCK (attr
) = blk
;
19025 case DW_FORM_block1
:
19026 blk
= dwarf_alloc_block (cu
);
19027 blk
->size
= read_1_byte (abfd
, info_ptr
);
19029 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19030 info_ptr
+= blk
->size
;
19031 DW_BLOCK (attr
) = blk
;
19033 case DW_FORM_data1
:
19034 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19038 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19041 case DW_FORM_flag_present
:
19042 DW_UNSND (attr
) = 1;
19044 case DW_FORM_sdata
:
19045 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19046 info_ptr
+= bytes_read
;
19048 case DW_FORM_udata
:
19049 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19050 info_ptr
+= bytes_read
;
19053 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19054 + read_1_byte (abfd
, info_ptr
));
19058 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19059 + read_2_bytes (abfd
, info_ptr
));
19063 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19064 + read_4_bytes (abfd
, info_ptr
));
19068 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19069 + read_8_bytes (abfd
, info_ptr
));
19072 case DW_FORM_ref_sig8
:
19073 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19076 case DW_FORM_ref_udata
:
19077 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19078 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19079 info_ptr
+= bytes_read
;
19081 case DW_FORM_indirect
:
19082 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19083 info_ptr
+= bytes_read
;
19084 if (form
== DW_FORM_implicit_const
)
19086 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19087 info_ptr
+= bytes_read
;
19089 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19092 case DW_FORM_implicit_const
:
19093 DW_SND (attr
) = implicit_const
;
19095 case DW_FORM_GNU_addr_index
:
19096 if (reader
->dwo_file
== NULL
)
19098 /* For now flag a hard error.
19099 Later we can turn this into a complaint. */
19100 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19101 dwarf_form_name (form
),
19102 bfd_get_filename (abfd
));
19104 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
19105 info_ptr
+= bytes_read
;
19107 case DW_FORM_GNU_str_index
:
19108 if (reader
->dwo_file
== NULL
)
19110 /* For now flag a hard error.
19111 Later we can turn this into a complaint if warranted. */
19112 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19113 dwarf_form_name (form
),
19114 bfd_get_filename (abfd
));
19117 ULONGEST str_index
=
19118 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19120 DW_STRING (attr
) = read_str_index (reader
, str_index
);
19121 DW_STRING_IS_CANONICAL (attr
) = 0;
19122 info_ptr
+= bytes_read
;
19126 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19127 dwarf_form_name (form
),
19128 bfd_get_filename (abfd
));
19132 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
19133 attr
->form
= DW_FORM_GNU_ref_alt
;
19135 /* We have seen instances where the compiler tried to emit a byte
19136 size attribute of -1 which ended up being encoded as an unsigned
19137 0xffffffff. Although 0xffffffff is technically a valid size value,
19138 an object of this size seems pretty unlikely so we can relatively
19139 safely treat these cases as if the size attribute was invalid and
19140 treat them as zero by default. */
19141 if (attr
->name
== DW_AT_byte_size
19142 && form
== DW_FORM_data4
19143 && DW_UNSND (attr
) >= 0xffffffff)
19146 (&symfile_complaints
,
19147 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19148 hex_string (DW_UNSND (attr
)));
19149 DW_UNSND (attr
) = 0;
19155 /* Read an attribute described by an abbreviated attribute. */
19157 static const gdb_byte
*
19158 read_attribute (const struct die_reader_specs
*reader
,
19159 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19160 const gdb_byte
*info_ptr
)
19162 attr
->name
= abbrev
->name
;
19163 return read_attribute_value (reader
, attr
, abbrev
->form
,
19164 abbrev
->implicit_const
, info_ptr
);
19167 /* Read dwarf information from a buffer. */
19169 static unsigned int
19170 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
19172 return bfd_get_8 (abfd
, buf
);
19176 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
19178 return bfd_get_signed_8 (abfd
, buf
);
19181 static unsigned int
19182 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19184 return bfd_get_16 (abfd
, buf
);
19188 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19190 return bfd_get_signed_16 (abfd
, buf
);
19193 static unsigned int
19194 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19196 return bfd_get_32 (abfd
, buf
);
19200 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19202 return bfd_get_signed_32 (abfd
, buf
);
19206 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19208 return bfd_get_64 (abfd
, buf
);
19212 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
19213 unsigned int *bytes_read
)
19215 struct comp_unit_head
*cu_header
= &cu
->header
;
19216 CORE_ADDR retval
= 0;
19218 if (cu_header
->signed_addr_p
)
19220 switch (cu_header
->addr_size
)
19223 retval
= bfd_get_signed_16 (abfd
, buf
);
19226 retval
= bfd_get_signed_32 (abfd
, buf
);
19229 retval
= bfd_get_signed_64 (abfd
, buf
);
19232 internal_error (__FILE__
, __LINE__
,
19233 _("read_address: bad switch, signed [in module %s]"),
19234 bfd_get_filename (abfd
));
19239 switch (cu_header
->addr_size
)
19242 retval
= bfd_get_16 (abfd
, buf
);
19245 retval
= bfd_get_32 (abfd
, buf
);
19248 retval
= bfd_get_64 (abfd
, buf
);
19251 internal_error (__FILE__
, __LINE__
,
19252 _("read_address: bad switch, "
19253 "unsigned [in module %s]"),
19254 bfd_get_filename (abfd
));
19258 *bytes_read
= cu_header
->addr_size
;
19262 /* Read the initial length from a section. The (draft) DWARF 3
19263 specification allows the initial length to take up either 4 bytes
19264 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
19265 bytes describe the length and all offsets will be 8 bytes in length
19268 An older, non-standard 64-bit format is also handled by this
19269 function. The older format in question stores the initial length
19270 as an 8-byte quantity without an escape value. Lengths greater
19271 than 2^32 aren't very common which means that the initial 4 bytes
19272 is almost always zero. Since a length value of zero doesn't make
19273 sense for the 32-bit format, this initial zero can be considered to
19274 be an escape value which indicates the presence of the older 64-bit
19275 format. As written, the code can't detect (old format) lengths
19276 greater than 4GB. If it becomes necessary to handle lengths
19277 somewhat larger than 4GB, we could allow other small values (such
19278 as the non-sensical values of 1, 2, and 3) to also be used as
19279 escape values indicating the presence of the old format.
19281 The value returned via bytes_read should be used to increment the
19282 relevant pointer after calling read_initial_length().
19284 [ Note: read_initial_length() and read_offset() are based on the
19285 document entitled "DWARF Debugging Information Format", revision
19286 3, draft 8, dated November 19, 2001. This document was obtained
19289 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
19291 This document is only a draft and is subject to change. (So beware.)
19293 Details regarding the older, non-standard 64-bit format were
19294 determined empirically by examining 64-bit ELF files produced by
19295 the SGI toolchain on an IRIX 6.5 machine.
19297 - Kevin, July 16, 2002
19301 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
19303 LONGEST length
= bfd_get_32 (abfd
, buf
);
19305 if (length
== 0xffffffff)
19307 length
= bfd_get_64 (abfd
, buf
+ 4);
19310 else if (length
== 0)
19312 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
19313 length
= bfd_get_64 (abfd
, buf
);
19324 /* Cover function for read_initial_length.
19325 Returns the length of the object at BUF, and stores the size of the
19326 initial length in *BYTES_READ and stores the size that offsets will be in
19328 If the initial length size is not equivalent to that specified in
19329 CU_HEADER then issue a complaint.
19330 This is useful when reading non-comp-unit headers. */
19333 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
19334 const struct comp_unit_head
*cu_header
,
19335 unsigned int *bytes_read
,
19336 unsigned int *offset_size
)
19338 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
19340 gdb_assert (cu_header
->initial_length_size
== 4
19341 || cu_header
->initial_length_size
== 8
19342 || cu_header
->initial_length_size
== 12);
19344 if (cu_header
->initial_length_size
!= *bytes_read
)
19345 complaint (&symfile_complaints
,
19346 _("intermixed 32-bit and 64-bit DWARF sections"));
19348 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
19352 /* Read an offset from the data stream. The size of the offset is
19353 given by cu_header->offset_size. */
19356 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
19357 const struct comp_unit_head
*cu_header
,
19358 unsigned int *bytes_read
)
19360 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
19362 *bytes_read
= cu_header
->offset_size
;
19366 /* Read an offset from the data stream. */
19369 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
19371 LONGEST retval
= 0;
19373 switch (offset_size
)
19376 retval
= bfd_get_32 (abfd
, buf
);
19379 retval
= bfd_get_64 (abfd
, buf
);
19382 internal_error (__FILE__
, __LINE__
,
19383 _("read_offset_1: bad switch [in module %s]"),
19384 bfd_get_filename (abfd
));
19390 static const gdb_byte
*
19391 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
19393 /* If the size of a host char is 8 bits, we can return a pointer
19394 to the buffer, otherwise we have to copy the data to a buffer
19395 allocated on the temporary obstack. */
19396 gdb_assert (HOST_CHAR_BIT
== 8);
19400 static const char *
19401 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
19402 unsigned int *bytes_read_ptr
)
19404 /* If the size of a host char is 8 bits, we can return a pointer
19405 to the string, otherwise we have to copy the string to a buffer
19406 allocated on the temporary obstack. */
19407 gdb_assert (HOST_CHAR_BIT
== 8);
19410 *bytes_read_ptr
= 1;
19413 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
19414 return (const char *) buf
;
19417 /* Return pointer to string at section SECT offset STR_OFFSET with error
19418 reporting strings FORM_NAME and SECT_NAME. */
19420 static const char *
19421 read_indirect_string_at_offset_from (struct objfile
*objfile
,
19422 bfd
*abfd
, LONGEST str_offset
,
19423 struct dwarf2_section_info
*sect
,
19424 const char *form_name
,
19425 const char *sect_name
)
19427 dwarf2_read_section (objfile
, sect
);
19428 if (sect
->buffer
== NULL
)
19429 error (_("%s used without %s section [in module %s]"),
19430 form_name
, sect_name
, bfd_get_filename (abfd
));
19431 if (str_offset
>= sect
->size
)
19432 error (_("%s pointing outside of %s section [in module %s]"),
19433 form_name
, sect_name
, bfd_get_filename (abfd
));
19434 gdb_assert (HOST_CHAR_BIT
== 8);
19435 if (sect
->buffer
[str_offset
] == '\0')
19437 return (const char *) (sect
->buffer
+ str_offset
);
19440 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19442 static const char *
19443 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19444 bfd
*abfd
, LONGEST str_offset
)
19446 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19448 &dwarf2_per_objfile
->str
,
19449 "DW_FORM_strp", ".debug_str");
19452 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
19454 static const char *
19455 read_indirect_line_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19456 bfd
*abfd
, LONGEST str_offset
)
19458 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19460 &dwarf2_per_objfile
->line_str
,
19461 "DW_FORM_line_strp",
19462 ".debug_line_str");
19465 /* Read a string at offset STR_OFFSET in the .debug_str section from
19466 the .dwz file DWZ. Throw an error if the offset is too large. If
19467 the string consists of a single NUL byte, return NULL; otherwise
19468 return a pointer to the string. */
19470 static const char *
19471 read_indirect_string_from_dwz (struct objfile
*objfile
, struct dwz_file
*dwz
,
19472 LONGEST str_offset
)
19474 dwarf2_read_section (objfile
, &dwz
->str
);
19476 if (dwz
->str
.buffer
== NULL
)
19477 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
19478 "section [in module %s]"),
19479 bfd_get_filename (dwz
->dwz_bfd
));
19480 if (str_offset
>= dwz
->str
.size
)
19481 error (_("DW_FORM_GNU_strp_alt pointing outside of "
19482 ".debug_str section [in module %s]"),
19483 bfd_get_filename (dwz
->dwz_bfd
));
19484 gdb_assert (HOST_CHAR_BIT
== 8);
19485 if (dwz
->str
.buffer
[str_offset
] == '\0')
19487 return (const char *) (dwz
->str
.buffer
+ str_offset
);
19490 /* Return pointer to string at .debug_str offset as read from BUF.
19491 BUF is assumed to be in a compilation unit described by CU_HEADER.
19492 Return *BYTES_READ_PTR count of bytes read from BUF. */
19494 static const char *
19495 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19496 const gdb_byte
*buf
,
19497 const struct comp_unit_head
*cu_header
,
19498 unsigned int *bytes_read_ptr
)
19500 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19502 return read_indirect_string_at_offset (dwarf2_per_objfile
, abfd
, str_offset
);
19505 /* Return pointer to string at .debug_line_str offset as read from BUF.
19506 BUF is assumed to be in a compilation unit described by CU_HEADER.
19507 Return *BYTES_READ_PTR count of bytes read from BUF. */
19509 static const char *
19510 read_indirect_line_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19511 bfd
*abfd
, const gdb_byte
*buf
,
19512 const struct comp_unit_head
*cu_header
,
19513 unsigned int *bytes_read_ptr
)
19515 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19517 return read_indirect_line_string_at_offset (dwarf2_per_objfile
, abfd
,
19522 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19523 unsigned int *bytes_read_ptr
)
19526 unsigned int num_read
;
19528 unsigned char byte
;
19535 byte
= bfd_get_8 (abfd
, buf
);
19538 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19539 if ((byte
& 128) == 0)
19545 *bytes_read_ptr
= num_read
;
19550 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19551 unsigned int *bytes_read_ptr
)
19554 int shift
, num_read
;
19555 unsigned char byte
;
19562 byte
= bfd_get_8 (abfd
, buf
);
19565 result
|= ((LONGEST
) (byte
& 127) << shift
);
19567 if ((byte
& 128) == 0)
19572 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
19573 result
|= -(((LONGEST
) 1) << shift
);
19574 *bytes_read_ptr
= num_read
;
19578 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19579 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
19580 ADDR_SIZE is the size of addresses from the CU header. */
19583 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19584 unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
19586 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19587 bfd
*abfd
= objfile
->obfd
;
19588 const gdb_byte
*info_ptr
;
19590 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
19591 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19592 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19593 objfile_name (objfile
));
19594 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
19595 error (_("DW_FORM_addr_index pointing outside of "
19596 ".debug_addr section [in module %s]"),
19597 objfile_name (objfile
));
19598 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19599 + addr_base
+ addr_index
* addr_size
);
19600 if (addr_size
== 4)
19601 return bfd_get_32 (abfd
, info_ptr
);
19603 return bfd_get_64 (abfd
, info_ptr
);
19606 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19609 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19611 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19612 cu
->addr_base
, cu
->header
.addr_size
);
19615 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19618 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19619 unsigned int *bytes_read
)
19621 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19622 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19624 return read_addr_index (cu
, addr_index
);
19627 /* Data structure to pass results from dwarf2_read_addr_index_reader
19628 back to dwarf2_read_addr_index. */
19630 struct dwarf2_read_addr_index_data
19632 ULONGEST addr_base
;
19636 /* die_reader_func for dwarf2_read_addr_index. */
19639 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
19640 const gdb_byte
*info_ptr
,
19641 struct die_info
*comp_unit_die
,
19645 struct dwarf2_cu
*cu
= reader
->cu
;
19646 struct dwarf2_read_addr_index_data
*aidata
=
19647 (struct dwarf2_read_addr_index_data
*) data
;
19649 aidata
->addr_base
= cu
->addr_base
;
19650 aidata
->addr_size
= cu
->header
.addr_size
;
19653 /* Given an index in .debug_addr, fetch the value.
19654 NOTE: This can be called during dwarf expression evaluation,
19655 long after the debug information has been read, and thus per_cu->cu
19656 may no longer exist. */
19659 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
19660 unsigned int addr_index
)
19662 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19663 struct dwarf2_cu
*cu
= per_cu
->cu
;
19664 ULONGEST addr_base
;
19667 /* We need addr_base and addr_size.
19668 If we don't have PER_CU->cu, we have to get it.
19669 Nasty, but the alternative is storing the needed info in PER_CU,
19670 which at this point doesn't seem justified: it's not clear how frequently
19671 it would get used and it would increase the size of every PER_CU.
19672 Entry points like dwarf2_per_cu_addr_size do a similar thing
19673 so we're not in uncharted territory here.
19674 Alas we need to be a bit more complicated as addr_base is contained
19677 We don't need to read the entire CU(/TU).
19678 We just need the header and top level die.
19680 IWBN to use the aging mechanism to let us lazily later discard the CU.
19681 For now we skip this optimization. */
19685 addr_base
= cu
->addr_base
;
19686 addr_size
= cu
->header
.addr_size
;
19690 struct dwarf2_read_addr_index_data aidata
;
19692 /* Note: We can't use init_cutu_and_read_dies_simple here,
19693 we need addr_base. */
19694 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0, false,
19695 dwarf2_read_addr_index_reader
, &aidata
);
19696 addr_base
= aidata
.addr_base
;
19697 addr_size
= aidata
.addr_size
;
19700 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19704 /* Given a DW_FORM_GNU_str_index, fetch the string.
19705 This is only used by the Fission support. */
19707 static const char *
19708 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19710 struct dwarf2_cu
*cu
= reader
->cu
;
19711 struct dwarf2_per_objfile
*dwarf2_per_objfile
19712 = cu
->per_cu
->dwarf2_per_objfile
;
19713 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19714 const char *objf_name
= objfile_name (objfile
);
19715 bfd
*abfd
= objfile
->obfd
;
19716 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
19717 struct dwarf2_section_info
*str_offsets_section
=
19718 &reader
->dwo_file
->sections
.str_offsets
;
19719 const gdb_byte
*info_ptr
;
19720 ULONGEST str_offset
;
19721 static const char form_name
[] = "DW_FORM_GNU_str_index";
19723 dwarf2_read_section (objfile
, str_section
);
19724 dwarf2_read_section (objfile
, str_offsets_section
);
19725 if (str_section
->buffer
== NULL
)
19726 error (_("%s used without .debug_str.dwo section"
19727 " in CU at offset %s [in module %s]"),
19728 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19729 if (str_offsets_section
->buffer
== NULL
)
19730 error (_("%s used without .debug_str_offsets.dwo section"
19731 " in CU at offset %s [in module %s]"),
19732 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19733 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
19734 error (_("%s pointing outside of .debug_str_offsets.dwo"
19735 " section in CU at offset %s [in module %s]"),
19736 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19737 info_ptr
= (str_offsets_section
->buffer
19738 + str_index
* cu
->header
.offset_size
);
19739 if (cu
->header
.offset_size
== 4)
19740 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19742 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19743 if (str_offset
>= str_section
->size
)
19744 error (_("Offset from %s pointing outside of"
19745 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19746 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19747 return (const char *) (str_section
->buffer
+ str_offset
);
19750 /* Return the length of an LEB128 number in BUF. */
19753 leb128_size (const gdb_byte
*buf
)
19755 const gdb_byte
*begin
= buf
;
19761 if ((byte
& 128) == 0)
19762 return buf
- begin
;
19767 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19776 cu
->language
= language_c
;
19779 case DW_LANG_C_plus_plus
:
19780 case DW_LANG_C_plus_plus_11
:
19781 case DW_LANG_C_plus_plus_14
:
19782 cu
->language
= language_cplus
;
19785 cu
->language
= language_d
;
19787 case DW_LANG_Fortran77
:
19788 case DW_LANG_Fortran90
:
19789 case DW_LANG_Fortran95
:
19790 case DW_LANG_Fortran03
:
19791 case DW_LANG_Fortran08
:
19792 cu
->language
= language_fortran
;
19795 cu
->language
= language_go
;
19797 case DW_LANG_Mips_Assembler
:
19798 cu
->language
= language_asm
;
19800 case DW_LANG_Ada83
:
19801 case DW_LANG_Ada95
:
19802 cu
->language
= language_ada
;
19804 case DW_LANG_Modula2
:
19805 cu
->language
= language_m2
;
19807 case DW_LANG_Pascal83
:
19808 cu
->language
= language_pascal
;
19811 cu
->language
= language_objc
;
19814 case DW_LANG_Rust_old
:
19815 cu
->language
= language_rust
;
19817 case DW_LANG_Cobol74
:
19818 case DW_LANG_Cobol85
:
19820 cu
->language
= language_minimal
;
19823 cu
->language_defn
= language_def (cu
->language
);
19826 /* Return the named attribute or NULL if not there. */
19828 static struct attribute
*
19829 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19834 struct attribute
*spec
= NULL
;
19836 for (i
= 0; i
< die
->num_attrs
; ++i
)
19838 if (die
->attrs
[i
].name
== name
)
19839 return &die
->attrs
[i
];
19840 if (die
->attrs
[i
].name
== DW_AT_specification
19841 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19842 spec
= &die
->attrs
[i
];
19848 die
= follow_die_ref (die
, spec
, &cu
);
19854 /* Return the named attribute or NULL if not there,
19855 but do not follow DW_AT_specification, etc.
19856 This is for use in contexts where we're reading .debug_types dies.
19857 Following DW_AT_specification, DW_AT_abstract_origin will take us
19858 back up the chain, and we want to go down. */
19860 static struct attribute
*
19861 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
19865 for (i
= 0; i
< die
->num_attrs
; ++i
)
19866 if (die
->attrs
[i
].name
== name
)
19867 return &die
->attrs
[i
];
19872 /* Return the string associated with a string-typed attribute, or NULL if it
19873 is either not found or is of an incorrect type. */
19875 static const char *
19876 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19878 struct attribute
*attr
;
19879 const char *str
= NULL
;
19881 attr
= dwarf2_attr (die
, name
, cu
);
19885 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
19886 || attr
->form
== DW_FORM_string
19887 || attr
->form
== DW_FORM_GNU_str_index
19888 || attr
->form
== DW_FORM_GNU_strp_alt
)
19889 str
= DW_STRING (attr
);
19891 complaint (&symfile_complaints
,
19892 _("string type expected for attribute %s for "
19893 "DIE at %s in module %s"),
19894 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
19895 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
19901 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19902 and holds a non-zero value. This function should only be used for
19903 DW_FORM_flag or DW_FORM_flag_present attributes. */
19906 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19908 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19910 return (attr
&& DW_UNSND (attr
));
19914 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19916 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19917 which value is non-zero. However, we have to be careful with
19918 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19919 (via dwarf2_flag_true_p) follows this attribute. So we may
19920 end up accidently finding a declaration attribute that belongs
19921 to a different DIE referenced by the specification attribute,
19922 even though the given DIE does not have a declaration attribute. */
19923 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19924 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19927 /* Return the die giving the specification for DIE, if there is
19928 one. *SPEC_CU is the CU containing DIE on input, and the CU
19929 containing the return value on output. If there is no
19930 specification, but there is an abstract origin, that is
19933 static struct die_info
*
19934 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19936 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19939 if (spec_attr
== NULL
)
19940 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19942 if (spec_attr
== NULL
)
19945 return follow_die_ref (die
, spec_attr
, spec_cu
);
19948 /* Stub for free_line_header to match void * callback types. */
19951 free_line_header_voidp (void *arg
)
19953 struct line_header
*lh
= (struct line_header
*) arg
;
19959 line_header::add_include_dir (const char *include_dir
)
19961 if (dwarf_line_debug
>= 2)
19962 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
19963 include_dirs
.size () + 1, include_dir
);
19965 include_dirs
.push_back (include_dir
);
19969 line_header::add_file_name (const char *name
,
19971 unsigned int mod_time
,
19972 unsigned int length
)
19974 if (dwarf_line_debug
>= 2)
19975 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
19976 (unsigned) file_names
.size () + 1, name
);
19978 file_names
.emplace_back (name
, d_index
, mod_time
, length
);
19981 /* A convenience function to find the proper .debug_line section for a CU. */
19983 static struct dwarf2_section_info
*
19984 get_debug_line_section (struct dwarf2_cu
*cu
)
19986 struct dwarf2_section_info
*section
;
19987 struct dwarf2_per_objfile
*dwarf2_per_objfile
19988 = cu
->per_cu
->dwarf2_per_objfile
;
19990 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
19992 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19993 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
19994 else if (cu
->per_cu
->is_dwz
)
19996 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19998 section
= &dwz
->line
;
20001 section
= &dwarf2_per_objfile
->line
;
20006 /* Read directory or file name entry format, starting with byte of
20007 format count entries, ULEB128 pairs of entry formats, ULEB128 of
20008 entries count and the entries themselves in the described entry
20012 read_formatted_entries (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
20013 bfd
*abfd
, const gdb_byte
**bufp
,
20014 struct line_header
*lh
,
20015 const struct comp_unit_head
*cu_header
,
20016 void (*callback
) (struct line_header
*lh
,
20019 unsigned int mod_time
,
20020 unsigned int length
))
20022 gdb_byte format_count
, formati
;
20023 ULONGEST data_count
, datai
;
20024 const gdb_byte
*buf
= *bufp
;
20025 const gdb_byte
*format_header_data
;
20026 unsigned int bytes_read
;
20028 format_count
= read_1_byte (abfd
, buf
);
20030 format_header_data
= buf
;
20031 for (formati
= 0; formati
< format_count
; formati
++)
20033 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20035 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20039 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20041 for (datai
= 0; datai
< data_count
; datai
++)
20043 const gdb_byte
*format
= format_header_data
;
20044 struct file_entry fe
;
20046 for (formati
= 0; formati
< format_count
; formati
++)
20048 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20049 format
+= bytes_read
;
20051 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20052 format
+= bytes_read
;
20054 gdb::optional
<const char *> string
;
20055 gdb::optional
<unsigned int> uint
;
20059 case DW_FORM_string
:
20060 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
20064 case DW_FORM_line_strp
:
20065 string
.emplace (read_indirect_line_string (dwarf2_per_objfile
,
20072 case DW_FORM_data1
:
20073 uint
.emplace (read_1_byte (abfd
, buf
));
20077 case DW_FORM_data2
:
20078 uint
.emplace (read_2_bytes (abfd
, buf
));
20082 case DW_FORM_data4
:
20083 uint
.emplace (read_4_bytes (abfd
, buf
));
20087 case DW_FORM_data8
:
20088 uint
.emplace (read_8_bytes (abfd
, buf
));
20092 case DW_FORM_udata
:
20093 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
20097 case DW_FORM_block
:
20098 /* It is valid only for DW_LNCT_timestamp which is ignored by
20103 switch (content_type
)
20106 if (string
.has_value ())
20109 case DW_LNCT_directory_index
:
20110 if (uint
.has_value ())
20111 fe
.d_index
= (dir_index
) *uint
;
20113 case DW_LNCT_timestamp
:
20114 if (uint
.has_value ())
20115 fe
.mod_time
= *uint
;
20118 if (uint
.has_value ())
20124 complaint (&symfile_complaints
,
20125 _("Unknown format content type %s"),
20126 pulongest (content_type
));
20130 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
20136 /* Read the statement program header starting at OFFSET in
20137 .debug_line, or .debug_line.dwo. Return a pointer
20138 to a struct line_header, allocated using xmalloc.
20139 Returns NULL if there is a problem reading the header, e.g., if it
20140 has a version we don't understand.
20142 NOTE: the strings in the include directory and file name tables of
20143 the returned object point into the dwarf line section buffer,
20144 and must not be freed. */
20146 static line_header_up
20147 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
20149 const gdb_byte
*line_ptr
;
20150 unsigned int bytes_read
, offset_size
;
20152 const char *cur_dir
, *cur_file
;
20153 struct dwarf2_section_info
*section
;
20155 struct dwarf2_per_objfile
*dwarf2_per_objfile
20156 = cu
->per_cu
->dwarf2_per_objfile
;
20158 section
= get_debug_line_section (cu
);
20159 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
20160 if (section
->buffer
== NULL
)
20162 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20163 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
20165 complaint (&symfile_complaints
, _("missing .debug_line section"));
20169 /* We can't do this until we know the section is non-empty.
20170 Only then do we know we have such a section. */
20171 abfd
= get_section_bfd_owner (section
);
20173 /* Make sure that at least there's room for the total_length field.
20174 That could be 12 bytes long, but we're just going to fudge that. */
20175 if (to_underlying (sect_off
) + 4 >= section
->size
)
20177 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20181 line_header_up
lh (new line_header ());
20183 lh
->sect_off
= sect_off
;
20184 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
20186 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
20188 /* Read in the header. */
20190 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
20191 &bytes_read
, &offset_size
);
20192 line_ptr
+= bytes_read
;
20193 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
20195 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20198 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
20199 lh
->version
= read_2_bytes (abfd
, line_ptr
);
20201 if (lh
->version
> 5)
20203 /* This is a version we don't understand. The format could have
20204 changed in ways we don't handle properly so just punt. */
20205 complaint (&symfile_complaints
,
20206 _("unsupported version in .debug_line section"));
20209 if (lh
->version
>= 5)
20211 gdb_byte segment_selector_size
;
20213 /* Skip address size. */
20214 read_1_byte (abfd
, line_ptr
);
20217 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
20219 if (segment_selector_size
!= 0)
20221 complaint (&symfile_complaints
,
20222 _("unsupported segment selector size %u "
20223 "in .debug_line section"),
20224 segment_selector_size
);
20228 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
20229 line_ptr
+= offset_size
;
20230 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
20232 if (lh
->version
>= 4)
20234 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
20238 lh
->maximum_ops_per_instruction
= 1;
20240 if (lh
->maximum_ops_per_instruction
== 0)
20242 lh
->maximum_ops_per_instruction
= 1;
20243 complaint (&symfile_complaints
,
20244 _("invalid maximum_ops_per_instruction "
20245 "in `.debug_line' section"));
20248 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
20250 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
20252 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
20254 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
20256 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
20258 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
20259 for (i
= 1; i
< lh
->opcode_base
; ++i
)
20261 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
20265 if (lh
->version
>= 5)
20267 /* Read directory table. */
20268 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20270 [] (struct line_header
*lh
, const char *name
,
20271 dir_index d_index
, unsigned int mod_time
,
20272 unsigned int length
)
20274 lh
->add_include_dir (name
);
20277 /* Read file name table. */
20278 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20280 [] (struct line_header
*lh
, const char *name
,
20281 dir_index d_index
, unsigned int mod_time
,
20282 unsigned int length
)
20284 lh
->add_file_name (name
, d_index
, mod_time
, length
);
20289 /* Read directory table. */
20290 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20292 line_ptr
+= bytes_read
;
20293 lh
->add_include_dir (cur_dir
);
20295 line_ptr
+= bytes_read
;
20297 /* Read file name table. */
20298 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20300 unsigned int mod_time
, length
;
20303 line_ptr
+= bytes_read
;
20304 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20305 line_ptr
+= bytes_read
;
20306 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20307 line_ptr
+= bytes_read
;
20308 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20309 line_ptr
+= bytes_read
;
20311 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
20313 line_ptr
+= bytes_read
;
20315 lh
->statement_program_start
= line_ptr
;
20317 if (line_ptr
> (section
->buffer
+ section
->size
))
20318 complaint (&symfile_complaints
,
20319 _("line number info header doesn't "
20320 "fit in `.debug_line' section"));
20325 /* Subroutine of dwarf_decode_lines to simplify it.
20326 Return the file name of the psymtab for included file FILE_INDEX
20327 in line header LH of PST.
20328 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20329 If space for the result is malloc'd, *NAME_HOLDER will be set.
20330 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
20332 static const char *
20333 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
20334 const struct partial_symtab
*pst
,
20335 const char *comp_dir
,
20336 gdb::unique_xmalloc_ptr
<char> *name_holder
)
20338 const file_entry
&fe
= lh
->file_names
[file_index
];
20339 const char *include_name
= fe
.name
;
20340 const char *include_name_to_compare
= include_name
;
20341 const char *pst_filename
;
20344 const char *dir_name
= fe
.include_dir (lh
);
20346 gdb::unique_xmalloc_ptr
<char> hold_compare
;
20347 if (!IS_ABSOLUTE_PATH (include_name
)
20348 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
20350 /* Avoid creating a duplicate psymtab for PST.
20351 We do this by comparing INCLUDE_NAME and PST_FILENAME.
20352 Before we do the comparison, however, we need to account
20353 for DIR_NAME and COMP_DIR.
20354 First prepend dir_name (if non-NULL). If we still don't
20355 have an absolute path prepend comp_dir (if non-NULL).
20356 However, the directory we record in the include-file's
20357 psymtab does not contain COMP_DIR (to match the
20358 corresponding symtab(s)).
20363 bash$ gcc -g ./hello.c
20364 include_name = "hello.c"
20366 DW_AT_comp_dir = comp_dir = "/tmp"
20367 DW_AT_name = "./hello.c"
20371 if (dir_name
!= NULL
)
20373 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
20374 include_name
, (char *) NULL
));
20375 include_name
= name_holder
->get ();
20376 include_name_to_compare
= include_name
;
20378 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
20380 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
20381 include_name
, (char *) NULL
));
20382 include_name_to_compare
= hold_compare
.get ();
20386 pst_filename
= pst
->filename
;
20387 gdb::unique_xmalloc_ptr
<char> copied_name
;
20388 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
20390 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
20391 pst_filename
, (char *) NULL
));
20392 pst_filename
= copied_name
.get ();
20395 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
20399 return include_name
;
20402 /* State machine to track the state of the line number program. */
20404 class lnp_state_machine
20407 /* Initialize a machine state for the start of a line number
20409 lnp_state_machine (gdbarch
*arch
, line_header
*lh
, bool record_lines_p
);
20411 file_entry
*current_file ()
20413 /* lh->file_names is 0-based, but the file name numbers in the
20414 statement program are 1-based. */
20415 return m_line_header
->file_name_at (m_file
);
20418 /* Record the line in the state machine. END_SEQUENCE is true if
20419 we're processing the end of a sequence. */
20420 void record_line (bool end_sequence
);
20422 /* Check address and if invalid nop-out the rest of the lines in this
20424 void check_line_address (struct dwarf2_cu
*cu
,
20425 const gdb_byte
*line_ptr
,
20426 CORE_ADDR lowpc
, CORE_ADDR address
);
20428 void handle_set_discriminator (unsigned int discriminator
)
20430 m_discriminator
= discriminator
;
20431 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
20434 /* Handle DW_LNE_set_address. */
20435 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
20438 address
+= baseaddr
;
20439 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
20442 /* Handle DW_LNS_advance_pc. */
20443 void handle_advance_pc (CORE_ADDR adjust
);
20445 /* Handle a special opcode. */
20446 void handle_special_opcode (unsigned char op_code
);
20448 /* Handle DW_LNS_advance_line. */
20449 void handle_advance_line (int line_delta
)
20451 advance_line (line_delta
);
20454 /* Handle DW_LNS_set_file. */
20455 void handle_set_file (file_name_index file
);
20457 /* Handle DW_LNS_negate_stmt. */
20458 void handle_negate_stmt ()
20460 m_is_stmt
= !m_is_stmt
;
20463 /* Handle DW_LNS_const_add_pc. */
20464 void handle_const_add_pc ();
20466 /* Handle DW_LNS_fixed_advance_pc. */
20467 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
20469 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20473 /* Handle DW_LNS_copy. */
20474 void handle_copy ()
20476 record_line (false);
20477 m_discriminator
= 0;
20480 /* Handle DW_LNE_end_sequence. */
20481 void handle_end_sequence ()
20483 m_record_line_callback
= ::record_line
;
20487 /* Advance the line by LINE_DELTA. */
20488 void advance_line (int line_delta
)
20490 m_line
+= line_delta
;
20492 if (line_delta
!= 0)
20493 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20496 gdbarch
*m_gdbarch
;
20498 /* True if we're recording lines.
20499 Otherwise we're building partial symtabs and are just interested in
20500 finding include files mentioned by the line number program. */
20501 bool m_record_lines_p
;
20503 /* The line number header. */
20504 line_header
*m_line_header
;
20506 /* These are part of the standard DWARF line number state machine,
20507 and initialized according to the DWARF spec. */
20509 unsigned char m_op_index
= 0;
20510 /* The line table index (1-based) of the current file. */
20511 file_name_index m_file
= (file_name_index
) 1;
20512 unsigned int m_line
= 1;
20514 /* These are initialized in the constructor. */
20516 CORE_ADDR m_address
;
20518 unsigned int m_discriminator
;
20520 /* Additional bits of state we need to track. */
20522 /* The last file that we called dwarf2_start_subfile for.
20523 This is only used for TLLs. */
20524 unsigned int m_last_file
= 0;
20525 /* The last file a line number was recorded for. */
20526 struct subfile
*m_last_subfile
= NULL
;
20528 /* The function to call to record a line. */
20529 record_line_ftype
*m_record_line_callback
= NULL
;
20531 /* The last line number that was recorded, used to coalesce
20532 consecutive entries for the same line. This can happen, for
20533 example, when discriminators are present. PR 17276. */
20534 unsigned int m_last_line
= 0;
20535 bool m_line_has_non_zero_discriminator
= false;
20539 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
20541 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
20542 / m_line_header
->maximum_ops_per_instruction
)
20543 * m_line_header
->minimum_instruction_length
);
20544 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20545 m_op_index
= ((m_op_index
+ adjust
)
20546 % m_line_header
->maximum_ops_per_instruction
);
20550 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
20552 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
20553 CORE_ADDR addr_adj
= (((m_op_index
20554 + (adj_opcode
/ m_line_header
->line_range
))
20555 / m_line_header
->maximum_ops_per_instruction
)
20556 * m_line_header
->minimum_instruction_length
);
20557 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20558 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
20559 % m_line_header
->maximum_ops_per_instruction
);
20561 int line_delta
= (m_line_header
->line_base
20562 + (adj_opcode
% m_line_header
->line_range
));
20563 advance_line (line_delta
);
20564 record_line (false);
20565 m_discriminator
= 0;
20569 lnp_state_machine::handle_set_file (file_name_index file
)
20573 const file_entry
*fe
= current_file ();
20575 dwarf2_debug_line_missing_file_complaint ();
20576 else if (m_record_lines_p
)
20578 const char *dir
= fe
->include_dir (m_line_header
);
20580 m_last_subfile
= current_subfile
;
20581 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20582 dwarf2_start_subfile (fe
->name
, dir
);
20587 lnp_state_machine::handle_const_add_pc ()
20590 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
20593 = (((m_op_index
+ adjust
)
20594 / m_line_header
->maximum_ops_per_instruction
)
20595 * m_line_header
->minimum_instruction_length
);
20597 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20598 m_op_index
= ((m_op_index
+ adjust
)
20599 % m_line_header
->maximum_ops_per_instruction
);
20602 /* Ignore this record_line request. */
20605 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
20610 /* Return non-zero if we should add LINE to the line number table.
20611 LINE is the line to add, LAST_LINE is the last line that was added,
20612 LAST_SUBFILE is the subfile for LAST_LINE.
20613 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
20614 had a non-zero discriminator.
20616 We have to be careful in the presence of discriminators.
20617 E.g., for this line:
20619 for (i = 0; i < 100000; i++);
20621 clang can emit four line number entries for that one line,
20622 each with a different discriminator.
20623 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20625 However, we want gdb to coalesce all four entries into one.
20626 Otherwise the user could stepi into the middle of the line and
20627 gdb would get confused about whether the pc really was in the
20628 middle of the line.
20630 Things are further complicated by the fact that two consecutive
20631 line number entries for the same line is a heuristic used by gcc
20632 to denote the end of the prologue. So we can't just discard duplicate
20633 entries, we have to be selective about it. The heuristic we use is
20634 that we only collapse consecutive entries for the same line if at least
20635 one of those entries has a non-zero discriminator. PR 17276.
20637 Note: Addresses in the line number state machine can never go backwards
20638 within one sequence, thus this coalescing is ok. */
20641 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
20642 int line_has_non_zero_discriminator
,
20643 struct subfile
*last_subfile
)
20645 if (current_subfile
!= last_subfile
)
20647 if (line
!= last_line
)
20649 /* Same line for the same file that we've seen already.
20650 As a last check, for pr 17276, only record the line if the line
20651 has never had a non-zero discriminator. */
20652 if (!line_has_non_zero_discriminator
)
20657 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
20658 in the line table of subfile SUBFILE. */
20661 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20662 unsigned int line
, CORE_ADDR address
,
20663 record_line_ftype p_record_line
)
20665 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20667 if (dwarf_line_debug
)
20669 fprintf_unfiltered (gdb_stdlog
,
20670 "Recording line %u, file %s, address %s\n",
20671 line
, lbasename (subfile
->name
),
20672 paddress (gdbarch
, address
));
20675 (*p_record_line
) (subfile
, line
, addr
);
20678 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20679 Mark the end of a set of line number records.
20680 The arguments are the same as for dwarf_record_line_1.
20681 If SUBFILE is NULL the request is ignored. */
20684 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20685 CORE_ADDR address
, record_line_ftype p_record_line
)
20687 if (subfile
== NULL
)
20690 if (dwarf_line_debug
)
20692 fprintf_unfiltered (gdb_stdlog
,
20693 "Finishing current line, file %s, address %s\n",
20694 lbasename (subfile
->name
),
20695 paddress (gdbarch
, address
));
20698 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
20702 lnp_state_machine::record_line (bool end_sequence
)
20704 if (dwarf_line_debug
)
20706 fprintf_unfiltered (gdb_stdlog
,
20707 "Processing actual line %u: file %u,"
20708 " address %s, is_stmt %u, discrim %u\n",
20709 m_line
, to_underlying (m_file
),
20710 paddress (m_gdbarch
, m_address
),
20711 m_is_stmt
, m_discriminator
);
20714 file_entry
*fe
= current_file ();
20717 dwarf2_debug_line_missing_file_complaint ();
20718 /* For now we ignore lines not starting on an instruction boundary.
20719 But not when processing end_sequence for compatibility with the
20720 previous version of the code. */
20721 else if (m_op_index
== 0 || end_sequence
)
20723 fe
->included_p
= 1;
20724 if (m_record_lines_p
&& m_is_stmt
)
20726 if (m_last_subfile
!= current_subfile
|| end_sequence
)
20728 dwarf_finish_line (m_gdbarch
, m_last_subfile
,
20729 m_address
, m_record_line_callback
);
20734 if (dwarf_record_line_p (m_line
, m_last_line
,
20735 m_line_has_non_zero_discriminator
,
20738 dwarf_record_line_1 (m_gdbarch
, current_subfile
,
20740 m_record_line_callback
);
20742 m_last_subfile
= current_subfile
;
20743 m_last_line
= m_line
;
20749 lnp_state_machine::lnp_state_machine (gdbarch
*arch
, line_header
*lh
,
20750 bool record_lines_p
)
20753 m_record_lines_p
= record_lines_p
;
20754 m_line_header
= lh
;
20756 m_record_line_callback
= ::record_line
;
20758 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20759 was a line entry for it so that the backend has a chance to adjust it
20760 and also record it in case it needs it. This is currently used by MIPS
20761 code, cf. `mips_adjust_dwarf2_line'. */
20762 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20763 m_is_stmt
= lh
->default_is_stmt
;
20764 m_discriminator
= 0;
20768 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20769 const gdb_byte
*line_ptr
,
20770 CORE_ADDR lowpc
, CORE_ADDR address
)
20772 /* If address < lowpc then it's not a usable value, it's outside the
20773 pc range of the CU. However, we restrict the test to only address
20774 values of zero to preserve GDB's previous behaviour which is to
20775 handle the specific case of a function being GC'd by the linker. */
20777 if (address
== 0 && address
< lowpc
)
20779 /* This line table is for a function which has been
20780 GCd by the linker. Ignore it. PR gdb/12528 */
20782 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20783 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20785 complaint (&symfile_complaints
,
20786 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20787 line_offset
, objfile_name (objfile
));
20788 m_record_line_callback
= noop_record_line
;
20789 /* Note: record_line_callback is left as noop_record_line until
20790 we see DW_LNE_end_sequence. */
20794 /* Subroutine of dwarf_decode_lines to simplify it.
20795 Process the line number information in LH.
20796 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20797 program in order to set included_p for every referenced header. */
20800 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20801 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20803 const gdb_byte
*line_ptr
, *extended_end
;
20804 const gdb_byte
*line_end
;
20805 unsigned int bytes_read
, extended_len
;
20806 unsigned char op_code
, extended_op
;
20807 CORE_ADDR baseaddr
;
20808 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20809 bfd
*abfd
= objfile
->obfd
;
20810 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
20811 /* True if we're recording line info (as opposed to building partial
20812 symtabs and just interested in finding include files mentioned by
20813 the line number program). */
20814 bool record_lines_p
= !decode_for_pst_p
;
20816 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
20818 line_ptr
= lh
->statement_program_start
;
20819 line_end
= lh
->statement_program_end
;
20821 /* Read the statement sequences until there's nothing left. */
20822 while (line_ptr
< line_end
)
20824 /* The DWARF line number program state machine. Reset the state
20825 machine at the start of each sequence. */
20826 lnp_state_machine
state_machine (gdbarch
, lh
, record_lines_p
);
20827 bool end_sequence
= false;
20829 if (record_lines_p
)
20831 /* Start a subfile for the current file of the state
20833 const file_entry
*fe
= state_machine
.current_file ();
20836 dwarf2_start_subfile (fe
->name
, fe
->include_dir (lh
));
20839 /* Decode the table. */
20840 while (line_ptr
< line_end
&& !end_sequence
)
20842 op_code
= read_1_byte (abfd
, line_ptr
);
20845 if (op_code
>= lh
->opcode_base
)
20847 /* Special opcode. */
20848 state_machine
.handle_special_opcode (op_code
);
20850 else switch (op_code
)
20852 case DW_LNS_extended_op
:
20853 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
20855 line_ptr
+= bytes_read
;
20856 extended_end
= line_ptr
+ extended_len
;
20857 extended_op
= read_1_byte (abfd
, line_ptr
);
20859 switch (extended_op
)
20861 case DW_LNE_end_sequence
:
20862 state_machine
.handle_end_sequence ();
20863 end_sequence
= true;
20865 case DW_LNE_set_address
:
20868 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
20869 line_ptr
+= bytes_read
;
20871 state_machine
.check_line_address (cu
, line_ptr
,
20873 state_machine
.handle_set_address (baseaddr
, address
);
20876 case DW_LNE_define_file
:
20878 const char *cur_file
;
20879 unsigned int mod_time
, length
;
20882 cur_file
= read_direct_string (abfd
, line_ptr
,
20884 line_ptr
+= bytes_read
;
20885 dindex
= (dir_index
)
20886 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20887 line_ptr
+= bytes_read
;
20889 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20890 line_ptr
+= bytes_read
;
20892 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20893 line_ptr
+= bytes_read
;
20894 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
20897 case DW_LNE_set_discriminator
:
20899 /* The discriminator is not interesting to the
20900 debugger; just ignore it. We still need to
20901 check its value though:
20902 if there are consecutive entries for the same
20903 (non-prologue) line we want to coalesce them.
20906 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20907 line_ptr
+= bytes_read
;
20909 state_machine
.handle_set_discriminator (discr
);
20913 complaint (&symfile_complaints
,
20914 _("mangled .debug_line section"));
20917 /* Make sure that we parsed the extended op correctly. If e.g.
20918 we expected a different address size than the producer used,
20919 we may have read the wrong number of bytes. */
20920 if (line_ptr
!= extended_end
)
20922 complaint (&symfile_complaints
,
20923 _("mangled .debug_line section"));
20928 state_machine
.handle_copy ();
20930 case DW_LNS_advance_pc
:
20933 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20934 line_ptr
+= bytes_read
;
20936 state_machine
.handle_advance_pc (adjust
);
20939 case DW_LNS_advance_line
:
20942 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
20943 line_ptr
+= bytes_read
;
20945 state_machine
.handle_advance_line (line_delta
);
20948 case DW_LNS_set_file
:
20950 file_name_index file
20951 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
20953 line_ptr
+= bytes_read
;
20955 state_machine
.handle_set_file (file
);
20958 case DW_LNS_set_column
:
20959 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20960 line_ptr
+= bytes_read
;
20962 case DW_LNS_negate_stmt
:
20963 state_machine
.handle_negate_stmt ();
20965 case DW_LNS_set_basic_block
:
20967 /* Add to the address register of the state machine the
20968 address increment value corresponding to special opcode
20969 255. I.e., this value is scaled by the minimum
20970 instruction length since special opcode 255 would have
20971 scaled the increment. */
20972 case DW_LNS_const_add_pc
:
20973 state_machine
.handle_const_add_pc ();
20975 case DW_LNS_fixed_advance_pc
:
20977 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
20980 state_machine
.handle_fixed_advance_pc (addr_adj
);
20985 /* Unknown standard opcode, ignore it. */
20988 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
20990 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20991 line_ptr
+= bytes_read
;
20998 dwarf2_debug_line_missing_end_sequence_complaint ();
21000 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
21001 in which case we still finish recording the last line). */
21002 state_machine
.record_line (true);
21006 /* Decode the Line Number Program (LNP) for the given line_header
21007 structure and CU. The actual information extracted and the type
21008 of structures created from the LNP depends on the value of PST.
21010 1. If PST is NULL, then this procedure uses the data from the program
21011 to create all necessary symbol tables, and their linetables.
21013 2. If PST is not NULL, this procedure reads the program to determine
21014 the list of files included by the unit represented by PST, and
21015 builds all the associated partial symbol tables.
21017 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
21018 It is used for relative paths in the line table.
21019 NOTE: When processing partial symtabs (pst != NULL),
21020 comp_dir == pst->dirname.
21022 NOTE: It is important that psymtabs have the same file name (via strcmp)
21023 as the corresponding symtab. Since COMP_DIR is not used in the name of the
21024 symtab we don't use it in the name of the psymtabs we create.
21025 E.g. expand_line_sal requires this when finding psymtabs to expand.
21026 A good testcase for this is mb-inline.exp.
21028 LOWPC is the lowest address in CU (or 0 if not known).
21030 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
21031 for its PC<->lines mapping information. Otherwise only the filename
21032 table is read in. */
21035 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
21036 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
21037 CORE_ADDR lowpc
, int decode_mapping
)
21039 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21040 const int decode_for_pst_p
= (pst
!= NULL
);
21042 if (decode_mapping
)
21043 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
21045 if (decode_for_pst_p
)
21049 /* Now that we're done scanning the Line Header Program, we can
21050 create the psymtab of each included file. */
21051 for (file_index
= 0; file_index
< lh
->file_names
.size (); file_index
++)
21052 if (lh
->file_names
[file_index
].included_p
== 1)
21054 gdb::unique_xmalloc_ptr
<char> name_holder
;
21055 const char *include_name
=
21056 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
,
21058 if (include_name
!= NULL
)
21059 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
21064 /* Make sure a symtab is created for every file, even files
21065 which contain only variables (i.e. no code with associated
21067 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
21070 for (i
= 0; i
< lh
->file_names
.size (); i
++)
21072 file_entry
&fe
= lh
->file_names
[i
];
21074 dwarf2_start_subfile (fe
.name
, fe
.include_dir (lh
));
21076 if (current_subfile
->symtab
== NULL
)
21078 current_subfile
->symtab
21079 = allocate_symtab (cust
, current_subfile
->name
);
21081 fe
.symtab
= current_subfile
->symtab
;
21086 /* Start a subfile for DWARF. FILENAME is the name of the file and
21087 DIRNAME the name of the source directory which contains FILENAME
21088 or NULL if not known.
21089 This routine tries to keep line numbers from identical absolute and
21090 relative file names in a common subfile.
21092 Using the `list' example from the GDB testsuite, which resides in
21093 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
21094 of /srcdir/list0.c yields the following debugging information for list0.c:
21096 DW_AT_name: /srcdir/list0.c
21097 DW_AT_comp_dir: /compdir
21098 files.files[0].name: list0.h
21099 files.files[0].dir: /srcdir
21100 files.files[1].name: list0.c
21101 files.files[1].dir: /srcdir
21103 The line number information for list0.c has to end up in a single
21104 subfile, so that `break /srcdir/list0.c:1' works as expected.
21105 start_subfile will ensure that this happens provided that we pass the
21106 concatenation of files.files[1].dir and files.files[1].name as the
21110 dwarf2_start_subfile (const char *filename
, const char *dirname
)
21114 /* In order not to lose the line information directory,
21115 we concatenate it to the filename when it makes sense.
21116 Note that the Dwarf3 standard says (speaking of filenames in line
21117 information): ``The directory index is ignored for file names
21118 that represent full path names''. Thus ignoring dirname in the
21119 `else' branch below isn't an issue. */
21121 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
21123 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
21127 start_subfile (filename
);
21133 /* Start a symtab for DWARF.
21134 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
21136 static struct compunit_symtab
*
21137 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
21138 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
21140 struct compunit_symtab
*cust
21141 = start_symtab (cu
->per_cu
->dwarf2_per_objfile
->objfile
, name
, comp_dir
,
21142 low_pc
, cu
->language
);
21144 record_debugformat ("DWARF 2");
21145 record_producer (cu
->producer
);
21147 /* We assume that we're processing GCC output. */
21148 processing_gcc_compilation
= 2;
21150 cu
->processing_has_namespace_info
= 0;
21156 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
21157 struct dwarf2_cu
*cu
)
21159 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21160 struct comp_unit_head
*cu_header
= &cu
->header
;
21162 /* NOTE drow/2003-01-30: There used to be a comment and some special
21163 code here to turn a symbol with DW_AT_external and a
21164 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
21165 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
21166 with some versions of binutils) where shared libraries could have
21167 relocations against symbols in their debug information - the
21168 minimal symbol would have the right address, but the debug info
21169 would not. It's no longer necessary, because we will explicitly
21170 apply relocations when we read in the debug information now. */
21172 /* A DW_AT_location attribute with no contents indicates that a
21173 variable has been optimized away. */
21174 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
21176 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21180 /* Handle one degenerate form of location expression specially, to
21181 preserve GDB's previous behavior when section offsets are
21182 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
21183 then mark this symbol as LOC_STATIC. */
21185 if (attr_form_is_block (attr
)
21186 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
21187 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
21188 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
21189 && (DW_BLOCK (attr
)->size
21190 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
21192 unsigned int dummy
;
21194 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
21195 SYMBOL_VALUE_ADDRESS (sym
) =
21196 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
21198 SYMBOL_VALUE_ADDRESS (sym
) =
21199 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
21200 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
21201 fixup_symbol_section (sym
, objfile
);
21202 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
21203 SYMBOL_SECTION (sym
));
21207 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
21208 expression evaluator, and use LOC_COMPUTED only when necessary
21209 (i.e. when the value of a register or memory location is
21210 referenced, or a thread-local block, etc.). Then again, it might
21211 not be worthwhile. I'm assuming that it isn't unless performance
21212 or memory numbers show me otherwise. */
21214 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
21216 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
21217 cu
->has_loclist
= 1;
21220 /* Given a pointer to a DWARF information entry, figure out if we need
21221 to make a symbol table entry for it, and if so, create a new entry
21222 and return a pointer to it.
21223 If TYPE is NULL, determine symbol type from the die, otherwise
21224 used the passed type.
21225 If SPACE is not NULL, use it to hold the new symbol. If it is
21226 NULL, allocate a new symbol on the objfile's obstack. */
21228 static struct symbol
*
21229 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
21230 struct symbol
*space
)
21232 struct dwarf2_per_objfile
*dwarf2_per_objfile
21233 = cu
->per_cu
->dwarf2_per_objfile
;
21234 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21235 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21236 struct symbol
*sym
= NULL
;
21238 struct attribute
*attr
= NULL
;
21239 struct attribute
*attr2
= NULL
;
21240 CORE_ADDR baseaddr
;
21241 struct pending
**list_to_add
= NULL
;
21243 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
21245 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21247 name
= dwarf2_name (die
, cu
);
21250 const char *linkagename
;
21251 int suppress_add
= 0;
21256 sym
= allocate_symbol (objfile
);
21257 OBJSTAT (objfile
, n_syms
++);
21259 /* Cache this symbol's name and the name's demangled form (if any). */
21260 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
21261 linkagename
= dwarf2_physname (name
, die
, cu
);
21262 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
21264 /* Fortran does not have mangling standard and the mangling does differ
21265 between gfortran, iFort etc. */
21266 if (cu
->language
== language_fortran
21267 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
21268 symbol_set_demangled_name (&(sym
->ginfo
),
21269 dwarf2_full_name (name
, die
, cu
),
21272 /* Default assumptions.
21273 Use the passed type or decode it from the die. */
21274 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21275 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21277 SYMBOL_TYPE (sym
) = type
;
21279 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
21280 attr
= dwarf2_attr (die
,
21281 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
21285 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
21288 attr
= dwarf2_attr (die
,
21289 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
21293 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
21294 struct file_entry
*fe
;
21296 if (cu
->line_header
!= NULL
)
21297 fe
= cu
->line_header
->file_name_at (file_index
);
21302 complaint (&symfile_complaints
,
21303 _("file index out of range"));
21305 symbol_set_symtab (sym
, fe
->symtab
);
21311 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
21316 addr
= attr_value_as_address (attr
);
21317 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
21318 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
21320 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
21321 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
21322 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
21323 add_symbol_to_list (sym
, cu
->list_in_scope
);
21325 case DW_TAG_subprogram
:
21326 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21328 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21329 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21330 if ((attr2
&& (DW_UNSND (attr2
) != 0))
21331 || cu
->language
== language_ada
)
21333 /* Subprograms marked external are stored as a global symbol.
21334 Ada subprograms, whether marked external or not, are always
21335 stored as a global symbol, because we want to be able to
21336 access them globally. For instance, we want to be able
21337 to break on a nested subprogram without having to
21338 specify the context. */
21339 list_to_add
= &global_symbols
;
21343 list_to_add
= cu
->list_in_scope
;
21346 case DW_TAG_inlined_subroutine
:
21347 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21349 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21350 SYMBOL_INLINED (sym
) = 1;
21351 list_to_add
= cu
->list_in_scope
;
21353 case DW_TAG_template_value_param
:
21355 /* Fall through. */
21356 case DW_TAG_constant
:
21357 case DW_TAG_variable
:
21358 case DW_TAG_member
:
21359 /* Compilation with minimal debug info may result in
21360 variables with missing type entries. Change the
21361 misleading `void' type to something sensible. */
21362 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
21363 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
21365 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21366 /* In the case of DW_TAG_member, we should only be called for
21367 static const members. */
21368 if (die
->tag
== DW_TAG_member
)
21370 /* dwarf2_add_field uses die_is_declaration,
21371 so we do the same. */
21372 gdb_assert (die_is_declaration (die
, cu
));
21377 dwarf2_const_value (attr
, sym
, cu
);
21378 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21381 if (attr2
&& (DW_UNSND (attr2
) != 0))
21382 list_to_add
= &global_symbols
;
21384 list_to_add
= cu
->list_in_scope
;
21388 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21391 var_decode_location (attr
, sym
, cu
);
21392 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21394 /* Fortran explicitly imports any global symbols to the local
21395 scope by DW_TAG_common_block. */
21396 if (cu
->language
== language_fortran
&& die
->parent
21397 && die
->parent
->tag
== DW_TAG_common_block
)
21400 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21401 && SYMBOL_VALUE_ADDRESS (sym
) == 0
21402 && !dwarf2_per_objfile
->has_section_at_zero
)
21404 /* When a static variable is eliminated by the linker,
21405 the corresponding debug information is not stripped
21406 out, but the variable address is set to null;
21407 do not add such variables into symbol table. */
21409 else if (attr2
&& (DW_UNSND (attr2
) != 0))
21411 /* Workaround gfortran PR debug/40040 - it uses
21412 DW_AT_location for variables in -fPIC libraries which may
21413 get overriden by other libraries/executable and get
21414 a different address. Resolve it by the minimal symbol
21415 which may come from inferior's executable using copy
21416 relocation. Make this workaround only for gfortran as for
21417 other compilers GDB cannot guess the minimal symbol
21418 Fortran mangling kind. */
21419 if (cu
->language
== language_fortran
&& die
->parent
21420 && die
->parent
->tag
== DW_TAG_module
21422 && startswith (cu
->producer
, "GNU Fortran"))
21423 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21425 /* A variable with DW_AT_external is never static,
21426 but it may be block-scoped. */
21427 list_to_add
= (cu
->list_in_scope
== &file_symbols
21428 ? &global_symbols
: cu
->list_in_scope
);
21431 list_to_add
= cu
->list_in_scope
;
21435 /* We do not know the address of this symbol.
21436 If it is an external symbol and we have type information
21437 for it, enter the symbol as a LOC_UNRESOLVED symbol.
21438 The address of the variable will then be determined from
21439 the minimal symbol table whenever the variable is
21441 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21443 /* Fortran explicitly imports any global symbols to the local
21444 scope by DW_TAG_common_block. */
21445 if (cu
->language
== language_fortran
&& die
->parent
21446 && die
->parent
->tag
== DW_TAG_common_block
)
21448 /* SYMBOL_CLASS doesn't matter here because
21449 read_common_block is going to reset it. */
21451 list_to_add
= cu
->list_in_scope
;
21453 else if (attr2
&& (DW_UNSND (attr2
) != 0)
21454 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
21456 /* A variable with DW_AT_external is never static, but it
21457 may be block-scoped. */
21458 list_to_add
= (cu
->list_in_scope
== &file_symbols
21459 ? &global_symbols
: cu
->list_in_scope
);
21461 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21463 else if (!die_is_declaration (die
, cu
))
21465 /* Use the default LOC_OPTIMIZED_OUT class. */
21466 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
21468 list_to_add
= cu
->list_in_scope
;
21472 case DW_TAG_formal_parameter
:
21473 /* If we are inside a function, mark this as an argument. If
21474 not, we might be looking at an argument to an inlined function
21475 when we do not have enough information to show inlined frames;
21476 pretend it's a local variable in that case so that the user can
21478 if (context_stack_depth
> 0
21479 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
21480 SYMBOL_IS_ARGUMENT (sym
) = 1;
21481 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21484 var_decode_location (attr
, sym
, cu
);
21486 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21489 dwarf2_const_value (attr
, sym
, cu
);
21492 list_to_add
= cu
->list_in_scope
;
21494 case DW_TAG_unspecified_parameters
:
21495 /* From varargs functions; gdb doesn't seem to have any
21496 interest in this information, so just ignore it for now.
21499 case DW_TAG_template_type_param
:
21501 /* Fall through. */
21502 case DW_TAG_class_type
:
21503 case DW_TAG_interface_type
:
21504 case DW_TAG_structure_type
:
21505 case DW_TAG_union_type
:
21506 case DW_TAG_set_type
:
21507 case DW_TAG_enumeration_type
:
21508 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21509 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
21512 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
21513 really ever be static objects: otherwise, if you try
21514 to, say, break of a class's method and you're in a file
21515 which doesn't mention that class, it won't work unless
21516 the check for all static symbols in lookup_symbol_aux
21517 saves you. See the OtherFileClass tests in
21518 gdb.c++/namespace.exp. */
21522 list_to_add
= (cu
->list_in_scope
== &file_symbols
21523 && cu
->language
== language_cplus
21524 ? &global_symbols
: cu
->list_in_scope
);
21526 /* The semantics of C++ state that "struct foo {
21527 ... }" also defines a typedef for "foo". */
21528 if (cu
->language
== language_cplus
21529 || cu
->language
== language_ada
21530 || cu
->language
== language_d
21531 || cu
->language
== language_rust
)
21533 /* The symbol's name is already allocated along
21534 with this objfile, so we don't need to
21535 duplicate it for the type. */
21536 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
21537 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
21542 case DW_TAG_typedef
:
21543 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21544 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21545 list_to_add
= cu
->list_in_scope
;
21547 case DW_TAG_base_type
:
21548 case DW_TAG_subrange_type
:
21549 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21550 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21551 list_to_add
= cu
->list_in_scope
;
21553 case DW_TAG_enumerator
:
21554 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21557 dwarf2_const_value (attr
, sym
, cu
);
21560 /* NOTE: carlton/2003-11-10: See comment above in the
21561 DW_TAG_class_type, etc. block. */
21563 list_to_add
= (cu
->list_in_scope
== &file_symbols
21564 && cu
->language
== language_cplus
21565 ? &global_symbols
: cu
->list_in_scope
);
21568 case DW_TAG_imported_declaration
:
21569 case DW_TAG_namespace
:
21570 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21571 list_to_add
= &global_symbols
;
21573 case DW_TAG_module
:
21574 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21575 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
21576 list_to_add
= &global_symbols
;
21578 case DW_TAG_common_block
:
21579 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
21580 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
21581 add_symbol_to_list (sym
, cu
->list_in_scope
);
21584 /* Not a tag we recognize. Hopefully we aren't processing
21585 trash data, but since we must specifically ignore things
21586 we don't recognize, there is nothing else we should do at
21588 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
21589 dwarf_tag_name (die
->tag
));
21595 sym
->hash_next
= objfile
->template_symbols
;
21596 objfile
->template_symbols
= sym
;
21597 list_to_add
= NULL
;
21600 if (list_to_add
!= NULL
)
21601 add_symbol_to_list (sym
, list_to_add
);
21603 /* For the benefit of old versions of GCC, check for anonymous
21604 namespaces based on the demangled name. */
21605 if (!cu
->processing_has_namespace_info
21606 && cu
->language
== language_cplus
)
21607 cp_scan_for_anonymous_namespaces (sym
, objfile
);
21612 /* Given an attr with a DW_FORM_dataN value in host byte order,
21613 zero-extend it as appropriate for the symbol's type. The DWARF
21614 standard (v4) is not entirely clear about the meaning of using
21615 DW_FORM_dataN for a constant with a signed type, where the type is
21616 wider than the data. The conclusion of a discussion on the DWARF
21617 list was that this is unspecified. We choose to always zero-extend
21618 because that is the interpretation long in use by GCC. */
21621 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21622 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21624 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21625 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21626 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21627 LONGEST l
= DW_UNSND (attr
);
21629 if (bits
< sizeof (*value
) * 8)
21631 l
&= ((LONGEST
) 1 << bits
) - 1;
21634 else if (bits
== sizeof (*value
) * 8)
21638 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21639 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21646 /* Read a constant value from an attribute. Either set *VALUE, or if
21647 the value does not fit in *VALUE, set *BYTES - either already
21648 allocated on the objfile obstack, or newly allocated on OBSTACK,
21649 or, set *BATON, if we translated the constant to a location
21653 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21654 const char *name
, struct obstack
*obstack
,
21655 struct dwarf2_cu
*cu
,
21656 LONGEST
*value
, const gdb_byte
**bytes
,
21657 struct dwarf2_locexpr_baton
**baton
)
21659 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21660 struct comp_unit_head
*cu_header
= &cu
->header
;
21661 struct dwarf_block
*blk
;
21662 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21663 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21669 switch (attr
->form
)
21672 case DW_FORM_GNU_addr_index
:
21676 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21677 dwarf2_const_value_length_mismatch_complaint (name
,
21678 cu_header
->addr_size
,
21679 TYPE_LENGTH (type
));
21680 /* Symbols of this form are reasonably rare, so we just
21681 piggyback on the existing location code rather than writing
21682 a new implementation of symbol_computed_ops. */
21683 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21684 (*baton
)->per_cu
= cu
->per_cu
;
21685 gdb_assert ((*baton
)->per_cu
);
21687 (*baton
)->size
= 2 + cu_header
->addr_size
;
21688 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21689 (*baton
)->data
= data
;
21691 data
[0] = DW_OP_addr
;
21692 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21693 byte_order
, DW_ADDR (attr
));
21694 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21697 case DW_FORM_string
:
21699 case DW_FORM_GNU_str_index
:
21700 case DW_FORM_GNU_strp_alt
:
21701 /* DW_STRING is already allocated on the objfile obstack, point
21703 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21705 case DW_FORM_block1
:
21706 case DW_FORM_block2
:
21707 case DW_FORM_block4
:
21708 case DW_FORM_block
:
21709 case DW_FORM_exprloc
:
21710 case DW_FORM_data16
:
21711 blk
= DW_BLOCK (attr
);
21712 if (TYPE_LENGTH (type
) != blk
->size
)
21713 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21714 TYPE_LENGTH (type
));
21715 *bytes
= blk
->data
;
21718 /* The DW_AT_const_value attributes are supposed to carry the
21719 symbol's value "represented as it would be on the target
21720 architecture." By the time we get here, it's already been
21721 converted to host endianness, so we just need to sign- or
21722 zero-extend it as appropriate. */
21723 case DW_FORM_data1
:
21724 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21726 case DW_FORM_data2
:
21727 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21729 case DW_FORM_data4
:
21730 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21732 case DW_FORM_data8
:
21733 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21736 case DW_FORM_sdata
:
21737 case DW_FORM_implicit_const
:
21738 *value
= DW_SND (attr
);
21741 case DW_FORM_udata
:
21742 *value
= DW_UNSND (attr
);
21746 complaint (&symfile_complaints
,
21747 _("unsupported const value attribute form: '%s'"),
21748 dwarf_form_name (attr
->form
));
21755 /* Copy constant value from an attribute to a symbol. */
21758 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21759 struct dwarf2_cu
*cu
)
21761 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21763 const gdb_byte
*bytes
;
21764 struct dwarf2_locexpr_baton
*baton
;
21766 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21767 SYMBOL_PRINT_NAME (sym
),
21768 &objfile
->objfile_obstack
, cu
,
21769 &value
, &bytes
, &baton
);
21773 SYMBOL_LOCATION_BATON (sym
) = baton
;
21774 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21776 else if (bytes
!= NULL
)
21778 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21779 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21783 SYMBOL_VALUE (sym
) = value
;
21784 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21788 /* Return the type of the die in question using its DW_AT_type attribute. */
21790 static struct type
*
21791 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21793 struct attribute
*type_attr
;
21795 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21798 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21799 /* A missing DW_AT_type represents a void type. */
21800 return objfile_type (objfile
)->builtin_void
;
21803 return lookup_die_type (die
, type_attr
, cu
);
21806 /* True iff CU's producer generates GNAT Ada auxiliary information
21807 that allows to find parallel types through that information instead
21808 of having to do expensive parallel lookups by type name. */
21811 need_gnat_info (struct dwarf2_cu
*cu
)
21813 /* Assume that the Ada compiler was GNAT, which always produces
21814 the auxiliary information. */
21815 return (cu
->language
== language_ada
);
21818 /* Return the auxiliary type of the die in question using its
21819 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
21820 attribute is not present. */
21822 static struct type
*
21823 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21825 struct attribute
*type_attr
;
21827 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
21831 return lookup_die_type (die
, type_attr
, cu
);
21834 /* If DIE has a descriptive_type attribute, then set the TYPE's
21835 descriptive type accordingly. */
21838 set_descriptive_type (struct type
*type
, struct die_info
*die
,
21839 struct dwarf2_cu
*cu
)
21841 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
21843 if (descriptive_type
)
21845 ALLOCATE_GNAT_AUX_TYPE (type
);
21846 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
21850 /* Return the containing type of the die in question using its
21851 DW_AT_containing_type attribute. */
21853 static struct type
*
21854 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21856 struct attribute
*type_attr
;
21857 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21859 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
21861 error (_("Dwarf Error: Problem turning containing type into gdb type "
21862 "[in module %s]"), objfile_name (objfile
));
21864 return lookup_die_type (die
, type_attr
, cu
);
21867 /* Return an error marker type to use for the ill formed type in DIE/CU. */
21869 static struct type
*
21870 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
21872 struct dwarf2_per_objfile
*dwarf2_per_objfile
21873 = cu
->per_cu
->dwarf2_per_objfile
;
21874 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21875 char *message
, *saved
;
21877 message
= xstrprintf (_("<unknown type in %s, CU %s, DIE %s>"),
21878 objfile_name (objfile
),
21879 sect_offset_str (cu
->header
.sect_off
),
21880 sect_offset_str (die
->sect_off
));
21881 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
21882 message
, strlen (message
));
21885 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
21888 /* Look up the type of DIE in CU using its type attribute ATTR.
21889 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
21890 DW_AT_containing_type.
21891 If there is no type substitute an error marker. */
21893 static struct type
*
21894 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
21895 struct dwarf2_cu
*cu
)
21897 struct dwarf2_per_objfile
*dwarf2_per_objfile
21898 = cu
->per_cu
->dwarf2_per_objfile
;
21899 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21900 struct type
*this_type
;
21902 gdb_assert (attr
->name
== DW_AT_type
21903 || attr
->name
== DW_AT_GNAT_descriptive_type
21904 || attr
->name
== DW_AT_containing_type
);
21906 /* First see if we have it cached. */
21908 if (attr
->form
== DW_FORM_GNU_ref_alt
)
21910 struct dwarf2_per_cu_data
*per_cu
;
21911 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21913 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
21914 dwarf2_per_objfile
);
21915 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
21917 else if (attr_form_is_ref (attr
))
21919 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21921 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
21923 else if (attr
->form
== DW_FORM_ref_sig8
)
21925 ULONGEST signature
= DW_SIGNATURE (attr
);
21927 return get_signatured_type (die
, signature
, cu
);
21931 complaint (&symfile_complaints
,
21932 _("Dwarf Error: Bad type attribute %s in DIE"
21933 " at %s [in module %s]"),
21934 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
21935 objfile_name (objfile
));
21936 return build_error_marker_type (cu
, die
);
21939 /* If not cached we need to read it in. */
21941 if (this_type
== NULL
)
21943 struct die_info
*type_die
= NULL
;
21944 struct dwarf2_cu
*type_cu
= cu
;
21946 if (attr_form_is_ref (attr
))
21947 type_die
= follow_die_ref (die
, attr
, &type_cu
);
21948 if (type_die
== NULL
)
21949 return build_error_marker_type (cu
, die
);
21950 /* If we find the type now, it's probably because the type came
21951 from an inter-CU reference and the type's CU got expanded before
21953 this_type
= read_type_die (type_die
, type_cu
);
21956 /* If we still don't have a type use an error marker. */
21958 if (this_type
== NULL
)
21959 return build_error_marker_type (cu
, die
);
21964 /* Return the type in DIE, CU.
21965 Returns NULL for invalid types.
21967 This first does a lookup in die_type_hash,
21968 and only reads the die in if necessary.
21970 NOTE: This can be called when reading in partial or full symbols. */
21972 static struct type
*
21973 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
21975 struct type
*this_type
;
21977 this_type
= get_die_type (die
, cu
);
21981 return read_type_die_1 (die
, cu
);
21984 /* Read the type in DIE, CU.
21985 Returns NULL for invalid types. */
21987 static struct type
*
21988 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
21990 struct type
*this_type
= NULL
;
21994 case DW_TAG_class_type
:
21995 case DW_TAG_interface_type
:
21996 case DW_TAG_structure_type
:
21997 case DW_TAG_union_type
:
21998 this_type
= read_structure_type (die
, cu
);
22000 case DW_TAG_enumeration_type
:
22001 this_type
= read_enumeration_type (die
, cu
);
22003 case DW_TAG_subprogram
:
22004 case DW_TAG_subroutine_type
:
22005 case DW_TAG_inlined_subroutine
:
22006 this_type
= read_subroutine_type (die
, cu
);
22008 case DW_TAG_array_type
:
22009 this_type
= read_array_type (die
, cu
);
22011 case DW_TAG_set_type
:
22012 this_type
= read_set_type (die
, cu
);
22014 case DW_TAG_pointer_type
:
22015 this_type
= read_tag_pointer_type (die
, cu
);
22017 case DW_TAG_ptr_to_member_type
:
22018 this_type
= read_tag_ptr_to_member_type (die
, cu
);
22020 case DW_TAG_reference_type
:
22021 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
22023 case DW_TAG_rvalue_reference_type
:
22024 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
22026 case DW_TAG_const_type
:
22027 this_type
= read_tag_const_type (die
, cu
);
22029 case DW_TAG_volatile_type
:
22030 this_type
= read_tag_volatile_type (die
, cu
);
22032 case DW_TAG_restrict_type
:
22033 this_type
= read_tag_restrict_type (die
, cu
);
22035 case DW_TAG_string_type
:
22036 this_type
= read_tag_string_type (die
, cu
);
22038 case DW_TAG_typedef
:
22039 this_type
= read_typedef (die
, cu
);
22041 case DW_TAG_subrange_type
:
22042 this_type
= read_subrange_type (die
, cu
);
22044 case DW_TAG_base_type
:
22045 this_type
= read_base_type (die
, cu
);
22047 case DW_TAG_unspecified_type
:
22048 this_type
= read_unspecified_type (die
, cu
);
22050 case DW_TAG_namespace
:
22051 this_type
= read_namespace_type (die
, cu
);
22053 case DW_TAG_module
:
22054 this_type
= read_module_type (die
, cu
);
22056 case DW_TAG_atomic_type
:
22057 this_type
= read_tag_atomic_type (die
, cu
);
22060 complaint (&symfile_complaints
,
22061 _("unexpected tag in read_type_die: '%s'"),
22062 dwarf_tag_name (die
->tag
));
22069 /* See if we can figure out if the class lives in a namespace. We do
22070 this by looking for a member function; its demangled name will
22071 contain namespace info, if there is any.
22072 Return the computed name or NULL.
22073 Space for the result is allocated on the objfile's obstack.
22074 This is the full-die version of guess_partial_die_structure_name.
22075 In this case we know DIE has no useful parent. */
22078 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22080 struct die_info
*spec_die
;
22081 struct dwarf2_cu
*spec_cu
;
22082 struct die_info
*child
;
22083 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22086 spec_die
= die_specification (die
, &spec_cu
);
22087 if (spec_die
!= NULL
)
22093 for (child
= die
->child
;
22095 child
= child
->sibling
)
22097 if (child
->tag
== DW_TAG_subprogram
)
22099 const char *linkage_name
= dw2_linkage_name (child
, cu
);
22101 if (linkage_name
!= NULL
)
22104 = language_class_name_from_physname (cu
->language_defn
,
22108 if (actual_name
!= NULL
)
22110 const char *die_name
= dwarf2_name (die
, cu
);
22112 if (die_name
!= NULL
22113 && strcmp (die_name
, actual_name
) != 0)
22115 /* Strip off the class name from the full name.
22116 We want the prefix. */
22117 int die_name_len
= strlen (die_name
);
22118 int actual_name_len
= strlen (actual_name
);
22120 /* Test for '::' as a sanity check. */
22121 if (actual_name_len
> die_name_len
+ 2
22122 && actual_name
[actual_name_len
22123 - die_name_len
- 1] == ':')
22124 name
= (char *) obstack_copy0 (
22125 &objfile
->per_bfd
->storage_obstack
,
22126 actual_name
, actual_name_len
- die_name_len
- 2);
22129 xfree (actual_name
);
22138 /* GCC might emit a nameless typedef that has a linkage name. Determine the
22139 prefix part in such case. See
22140 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22142 static const char *
22143 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22145 struct attribute
*attr
;
22148 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
22149 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
22152 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
22155 attr
= dw2_linkage_name_attr (die
, cu
);
22156 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22159 /* dwarf2_name had to be already called. */
22160 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
22162 /* Strip the base name, keep any leading namespaces/classes. */
22163 base
= strrchr (DW_STRING (attr
), ':');
22164 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
22167 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22168 return (char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22170 &base
[-1] - DW_STRING (attr
));
22173 /* Return the name of the namespace/class that DIE is defined within,
22174 or "" if we can't tell. The caller should not xfree the result.
22176 For example, if we're within the method foo() in the following
22186 then determine_prefix on foo's die will return "N::C". */
22188 static const char *
22189 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22191 struct dwarf2_per_objfile
*dwarf2_per_objfile
22192 = cu
->per_cu
->dwarf2_per_objfile
;
22193 struct die_info
*parent
, *spec_die
;
22194 struct dwarf2_cu
*spec_cu
;
22195 struct type
*parent_type
;
22196 const char *retval
;
22198 if (cu
->language
!= language_cplus
22199 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
22200 && cu
->language
!= language_rust
)
22203 retval
= anonymous_struct_prefix (die
, cu
);
22207 /* We have to be careful in the presence of DW_AT_specification.
22208 For example, with GCC 3.4, given the code
22212 // Definition of N::foo.
22216 then we'll have a tree of DIEs like this:
22218 1: DW_TAG_compile_unit
22219 2: DW_TAG_namespace // N
22220 3: DW_TAG_subprogram // declaration of N::foo
22221 4: DW_TAG_subprogram // definition of N::foo
22222 DW_AT_specification // refers to die #3
22224 Thus, when processing die #4, we have to pretend that we're in
22225 the context of its DW_AT_specification, namely the contex of die
22228 spec_die
= die_specification (die
, &spec_cu
);
22229 if (spec_die
== NULL
)
22230 parent
= die
->parent
;
22233 parent
= spec_die
->parent
;
22237 if (parent
== NULL
)
22239 else if (parent
->building_fullname
)
22242 const char *parent_name
;
22244 /* It has been seen on RealView 2.2 built binaries,
22245 DW_TAG_template_type_param types actually _defined_ as
22246 children of the parent class:
22249 template class <class Enum> Class{};
22250 Class<enum E> class_e;
22252 1: DW_TAG_class_type (Class)
22253 2: DW_TAG_enumeration_type (E)
22254 3: DW_TAG_enumerator (enum1:0)
22255 3: DW_TAG_enumerator (enum2:1)
22257 2: DW_TAG_template_type_param
22258 DW_AT_type DW_FORM_ref_udata (E)
22260 Besides being broken debug info, it can put GDB into an
22261 infinite loop. Consider:
22263 When we're building the full name for Class<E>, we'll start
22264 at Class, and go look over its template type parameters,
22265 finding E. We'll then try to build the full name of E, and
22266 reach here. We're now trying to build the full name of E,
22267 and look over the parent DIE for containing scope. In the
22268 broken case, if we followed the parent DIE of E, we'd again
22269 find Class, and once again go look at its template type
22270 arguments, etc., etc. Simply don't consider such parent die
22271 as source-level parent of this die (it can't be, the language
22272 doesn't allow it), and break the loop here. */
22273 name
= dwarf2_name (die
, cu
);
22274 parent_name
= dwarf2_name (parent
, cu
);
22275 complaint (&symfile_complaints
,
22276 _("template param type '%s' defined within parent '%s'"),
22277 name
? name
: "<unknown>",
22278 parent_name
? parent_name
: "<unknown>");
22282 switch (parent
->tag
)
22284 case DW_TAG_namespace
:
22285 parent_type
= read_type_die (parent
, cu
);
22286 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
22287 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
22288 Work around this problem here. */
22289 if (cu
->language
== language_cplus
22290 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
22292 /* We give a name to even anonymous namespaces. */
22293 return TYPE_TAG_NAME (parent_type
);
22294 case DW_TAG_class_type
:
22295 case DW_TAG_interface_type
:
22296 case DW_TAG_structure_type
:
22297 case DW_TAG_union_type
:
22298 case DW_TAG_module
:
22299 parent_type
= read_type_die (parent
, cu
);
22300 if (TYPE_TAG_NAME (parent_type
) != NULL
)
22301 return TYPE_TAG_NAME (parent_type
);
22303 /* An anonymous structure is only allowed non-static data
22304 members; no typedefs, no member functions, et cetera.
22305 So it does not need a prefix. */
22307 case DW_TAG_compile_unit
:
22308 case DW_TAG_partial_unit
:
22309 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
22310 if (cu
->language
== language_cplus
22311 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
22312 && die
->child
!= NULL
22313 && (die
->tag
== DW_TAG_class_type
22314 || die
->tag
== DW_TAG_structure_type
22315 || die
->tag
== DW_TAG_union_type
))
22317 char *name
= guess_full_die_structure_name (die
, cu
);
22322 case DW_TAG_enumeration_type
:
22323 parent_type
= read_type_die (parent
, cu
);
22324 if (TYPE_DECLARED_CLASS (parent_type
))
22326 if (TYPE_TAG_NAME (parent_type
) != NULL
)
22327 return TYPE_TAG_NAME (parent_type
);
22330 /* Fall through. */
22332 return determine_prefix (parent
, cu
);
22336 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
22337 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
22338 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
22339 an obconcat, otherwise allocate storage for the result. The CU argument is
22340 used to determine the language and hence, the appropriate separator. */
22342 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
22345 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
22346 int physname
, struct dwarf2_cu
*cu
)
22348 const char *lead
= "";
22351 if (suffix
== NULL
|| suffix
[0] == '\0'
22352 || prefix
== NULL
|| prefix
[0] == '\0')
22354 else if (cu
->language
== language_d
)
22356 /* For D, the 'main' function could be defined in any module, but it
22357 should never be prefixed. */
22358 if (strcmp (suffix
, "D main") == 0)
22366 else if (cu
->language
== language_fortran
&& physname
)
22368 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
22369 DW_AT_MIPS_linkage_name is preferred and used instead. */
22377 if (prefix
== NULL
)
22379 if (suffix
== NULL
)
22386 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
22388 strcpy (retval
, lead
);
22389 strcat (retval
, prefix
);
22390 strcat (retval
, sep
);
22391 strcat (retval
, suffix
);
22396 /* We have an obstack. */
22397 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
22401 /* Return sibling of die, NULL if no sibling. */
22403 static struct die_info
*
22404 sibling_die (struct die_info
*die
)
22406 return die
->sibling
;
22409 /* Get name of a die, return NULL if not found. */
22411 static const char *
22412 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
22413 struct obstack
*obstack
)
22415 if (name
&& cu
->language
== language_cplus
)
22417 std::string canon_name
= cp_canonicalize_string (name
);
22419 if (!canon_name
.empty ())
22421 if (canon_name
!= name
)
22422 name
= (const char *) obstack_copy0 (obstack
,
22423 canon_name
.c_str (),
22424 canon_name
.length ());
22431 /* Get name of a die, return NULL if not found.
22432 Anonymous namespaces are converted to their magic string. */
22434 static const char *
22435 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22437 struct attribute
*attr
;
22438 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22440 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
22441 if ((!attr
|| !DW_STRING (attr
))
22442 && die
->tag
!= DW_TAG_namespace
22443 && die
->tag
!= DW_TAG_class_type
22444 && die
->tag
!= DW_TAG_interface_type
22445 && die
->tag
!= DW_TAG_structure_type
22446 && die
->tag
!= DW_TAG_union_type
)
22451 case DW_TAG_compile_unit
:
22452 case DW_TAG_partial_unit
:
22453 /* Compilation units have a DW_AT_name that is a filename, not
22454 a source language identifier. */
22455 case DW_TAG_enumeration_type
:
22456 case DW_TAG_enumerator
:
22457 /* These tags always have simple identifiers already; no need
22458 to canonicalize them. */
22459 return DW_STRING (attr
);
22461 case DW_TAG_namespace
:
22462 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
22463 return DW_STRING (attr
);
22464 return CP_ANONYMOUS_NAMESPACE_STR
;
22466 case DW_TAG_class_type
:
22467 case DW_TAG_interface_type
:
22468 case DW_TAG_structure_type
:
22469 case DW_TAG_union_type
:
22470 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
22471 structures or unions. These were of the form "._%d" in GCC 4.1,
22472 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
22473 and GCC 4.4. We work around this problem by ignoring these. */
22474 if (attr
&& DW_STRING (attr
)
22475 && (startswith (DW_STRING (attr
), "._")
22476 || startswith (DW_STRING (attr
), "<anonymous")))
22479 /* GCC might emit a nameless typedef that has a linkage name. See
22480 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22481 if (!attr
|| DW_STRING (attr
) == NULL
)
22483 char *demangled
= NULL
;
22485 attr
= dw2_linkage_name_attr (die
, cu
);
22486 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22489 /* Avoid demangling DW_STRING (attr) the second time on a second
22490 call for the same DIE. */
22491 if (!DW_STRING_IS_CANONICAL (attr
))
22492 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
22498 /* FIXME: we already did this for the partial symbol... */
22501 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22502 demangled
, strlen (demangled
)));
22503 DW_STRING_IS_CANONICAL (attr
) = 1;
22506 /* Strip any leading namespaces/classes, keep only the base name.
22507 DW_AT_name for named DIEs does not contain the prefixes. */
22508 base
= strrchr (DW_STRING (attr
), ':');
22509 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
22512 return DW_STRING (attr
);
22521 if (!DW_STRING_IS_CANONICAL (attr
))
22524 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
22525 &objfile
->per_bfd
->storage_obstack
);
22526 DW_STRING_IS_CANONICAL (attr
) = 1;
22528 return DW_STRING (attr
);
22531 /* Return the die that this die in an extension of, or NULL if there
22532 is none. *EXT_CU is the CU containing DIE on input, and the CU
22533 containing the return value on output. */
22535 static struct die_info
*
22536 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
22538 struct attribute
*attr
;
22540 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
22544 return follow_die_ref (die
, attr
, ext_cu
);
22547 /* Convert a DIE tag into its string name. */
22549 static const char *
22550 dwarf_tag_name (unsigned tag
)
22552 const char *name
= get_DW_TAG_name (tag
);
22555 return "DW_TAG_<unknown>";
22560 /* Convert a DWARF attribute code into its string name. */
22562 static const char *
22563 dwarf_attr_name (unsigned attr
)
22567 #ifdef MIPS /* collides with DW_AT_HP_block_index */
22568 if (attr
== DW_AT_MIPS_fde
)
22569 return "DW_AT_MIPS_fde";
22571 if (attr
== DW_AT_HP_block_index
)
22572 return "DW_AT_HP_block_index";
22575 name
= get_DW_AT_name (attr
);
22578 return "DW_AT_<unknown>";
22583 /* Convert a DWARF value form code into its string name. */
22585 static const char *
22586 dwarf_form_name (unsigned form
)
22588 const char *name
= get_DW_FORM_name (form
);
22591 return "DW_FORM_<unknown>";
22596 static const char *
22597 dwarf_bool_name (unsigned mybool
)
22605 /* Convert a DWARF type code into its string name. */
22607 static const char *
22608 dwarf_type_encoding_name (unsigned enc
)
22610 const char *name
= get_DW_ATE_name (enc
);
22613 return "DW_ATE_<unknown>";
22619 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
22623 print_spaces (indent
, f
);
22624 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
22625 dwarf_tag_name (die
->tag
), die
->abbrev
,
22626 sect_offset_str (die
->sect_off
));
22628 if (die
->parent
!= NULL
)
22630 print_spaces (indent
, f
);
22631 fprintf_unfiltered (f
, " parent at offset: %s\n",
22632 sect_offset_str (die
->parent
->sect_off
));
22635 print_spaces (indent
, f
);
22636 fprintf_unfiltered (f
, " has children: %s\n",
22637 dwarf_bool_name (die
->child
!= NULL
));
22639 print_spaces (indent
, f
);
22640 fprintf_unfiltered (f
, " attributes:\n");
22642 for (i
= 0; i
< die
->num_attrs
; ++i
)
22644 print_spaces (indent
, f
);
22645 fprintf_unfiltered (f
, " %s (%s) ",
22646 dwarf_attr_name (die
->attrs
[i
].name
),
22647 dwarf_form_name (die
->attrs
[i
].form
));
22649 switch (die
->attrs
[i
].form
)
22652 case DW_FORM_GNU_addr_index
:
22653 fprintf_unfiltered (f
, "address: ");
22654 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
22656 case DW_FORM_block2
:
22657 case DW_FORM_block4
:
22658 case DW_FORM_block
:
22659 case DW_FORM_block1
:
22660 fprintf_unfiltered (f
, "block: size %s",
22661 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22663 case DW_FORM_exprloc
:
22664 fprintf_unfiltered (f
, "expression: size %s",
22665 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22667 case DW_FORM_data16
:
22668 fprintf_unfiltered (f
, "constant of 16 bytes");
22670 case DW_FORM_ref_addr
:
22671 fprintf_unfiltered (f
, "ref address: ");
22672 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22674 case DW_FORM_GNU_ref_alt
:
22675 fprintf_unfiltered (f
, "alt ref address: ");
22676 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22682 case DW_FORM_ref_udata
:
22683 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
22684 (long) (DW_UNSND (&die
->attrs
[i
])));
22686 case DW_FORM_data1
:
22687 case DW_FORM_data2
:
22688 case DW_FORM_data4
:
22689 case DW_FORM_data8
:
22690 case DW_FORM_udata
:
22691 case DW_FORM_sdata
:
22692 fprintf_unfiltered (f
, "constant: %s",
22693 pulongest (DW_UNSND (&die
->attrs
[i
])));
22695 case DW_FORM_sec_offset
:
22696 fprintf_unfiltered (f
, "section offset: %s",
22697 pulongest (DW_UNSND (&die
->attrs
[i
])));
22699 case DW_FORM_ref_sig8
:
22700 fprintf_unfiltered (f
, "signature: %s",
22701 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
22703 case DW_FORM_string
:
22705 case DW_FORM_line_strp
:
22706 case DW_FORM_GNU_str_index
:
22707 case DW_FORM_GNU_strp_alt
:
22708 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22709 DW_STRING (&die
->attrs
[i
])
22710 ? DW_STRING (&die
->attrs
[i
]) : "",
22711 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
22714 if (DW_UNSND (&die
->attrs
[i
]))
22715 fprintf_unfiltered (f
, "flag: TRUE");
22717 fprintf_unfiltered (f
, "flag: FALSE");
22719 case DW_FORM_flag_present
:
22720 fprintf_unfiltered (f
, "flag: TRUE");
22722 case DW_FORM_indirect
:
22723 /* The reader will have reduced the indirect form to
22724 the "base form" so this form should not occur. */
22725 fprintf_unfiltered (f
,
22726 "unexpected attribute form: DW_FORM_indirect");
22728 case DW_FORM_implicit_const
:
22729 fprintf_unfiltered (f
, "constant: %s",
22730 plongest (DW_SND (&die
->attrs
[i
])));
22733 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
22734 die
->attrs
[i
].form
);
22737 fprintf_unfiltered (f
, "\n");
22742 dump_die_for_error (struct die_info
*die
)
22744 dump_die_shallow (gdb_stderr
, 0, die
);
22748 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
22750 int indent
= level
* 4;
22752 gdb_assert (die
!= NULL
);
22754 if (level
>= max_level
)
22757 dump_die_shallow (f
, indent
, die
);
22759 if (die
->child
!= NULL
)
22761 print_spaces (indent
, f
);
22762 fprintf_unfiltered (f
, " Children:");
22763 if (level
+ 1 < max_level
)
22765 fprintf_unfiltered (f
, "\n");
22766 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22770 fprintf_unfiltered (f
,
22771 " [not printed, max nesting level reached]\n");
22775 if (die
->sibling
!= NULL
&& level
> 0)
22777 dump_die_1 (f
, level
, max_level
, die
->sibling
);
22781 /* This is called from the pdie macro in gdbinit.in.
22782 It's not static so gcc will keep a copy callable from gdb. */
22785 dump_die (struct die_info
*die
, int max_level
)
22787 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
22791 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
22795 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
22796 to_underlying (die
->sect_off
),
22802 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
22806 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
22808 if (attr_form_is_ref (attr
))
22809 return (sect_offset
) DW_UNSND (attr
);
22811 complaint (&symfile_complaints
,
22812 _("unsupported die ref attribute form: '%s'"),
22813 dwarf_form_name (attr
->form
));
22817 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
22818 * the value held by the attribute is not constant. */
22821 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
22823 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
22824 return DW_SND (attr
);
22825 else if (attr
->form
== DW_FORM_udata
22826 || attr
->form
== DW_FORM_data1
22827 || attr
->form
== DW_FORM_data2
22828 || attr
->form
== DW_FORM_data4
22829 || attr
->form
== DW_FORM_data8
)
22830 return DW_UNSND (attr
);
22833 /* For DW_FORM_data16 see attr_form_is_constant. */
22834 complaint (&symfile_complaints
,
22835 _("Attribute value is not a constant (%s)"),
22836 dwarf_form_name (attr
->form
));
22837 return default_value
;
22841 /* Follow reference or signature attribute ATTR of SRC_DIE.
22842 On entry *REF_CU is the CU of SRC_DIE.
22843 On exit *REF_CU is the CU of the result. */
22845 static struct die_info
*
22846 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22847 struct dwarf2_cu
**ref_cu
)
22849 struct die_info
*die
;
22851 if (attr_form_is_ref (attr
))
22852 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22853 else if (attr
->form
== DW_FORM_ref_sig8
)
22854 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22857 dump_die_for_error (src_die
);
22858 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22859 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22865 /* Follow reference OFFSET.
22866 On entry *REF_CU is the CU of the source die referencing OFFSET.
22867 On exit *REF_CU is the CU of the result.
22868 Returns NULL if OFFSET is invalid. */
22870 static struct die_info
*
22871 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22872 struct dwarf2_cu
**ref_cu
)
22874 struct die_info temp_die
;
22875 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22876 struct dwarf2_per_objfile
*dwarf2_per_objfile
22877 = cu
->per_cu
->dwarf2_per_objfile
;
22879 gdb_assert (cu
->per_cu
!= NULL
);
22883 if (cu
->per_cu
->is_debug_types
)
22885 /* .debug_types CUs cannot reference anything outside their CU.
22886 If they need to, they have to reference a signatured type via
22887 DW_FORM_ref_sig8. */
22888 if (!offset_in_cu_p (&cu
->header
, sect_off
))
22891 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22892 || !offset_in_cu_p (&cu
->header
, sect_off
))
22894 struct dwarf2_per_cu_data
*per_cu
;
22896 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22897 dwarf2_per_objfile
);
22899 /* If necessary, add it to the queue and load its DIEs. */
22900 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
22901 load_full_comp_unit (per_cu
, false, cu
->language
);
22903 target_cu
= per_cu
->cu
;
22905 else if (cu
->dies
== NULL
)
22907 /* We're loading full DIEs during partial symbol reading. */
22908 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
22909 load_full_comp_unit (cu
->per_cu
, false, language_minimal
);
22912 *ref_cu
= target_cu
;
22913 temp_die
.sect_off
= sect_off
;
22914 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22916 to_underlying (sect_off
));
22919 /* Follow reference attribute ATTR of SRC_DIE.
22920 On entry *REF_CU is the CU of SRC_DIE.
22921 On exit *REF_CU is the CU of the result. */
22923 static struct die_info
*
22924 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22925 struct dwarf2_cu
**ref_cu
)
22927 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22928 struct dwarf2_cu
*cu
= *ref_cu
;
22929 struct die_info
*die
;
22931 die
= follow_die_offset (sect_off
,
22932 (attr
->form
== DW_FORM_GNU_ref_alt
22933 || cu
->per_cu
->is_dwz
),
22936 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
22937 "at %s [in module %s]"),
22938 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
22939 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
22944 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
22945 Returned value is intended for DW_OP_call*. Returned
22946 dwarf2_locexpr_baton->data has lifetime of
22947 PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */
22949 struct dwarf2_locexpr_baton
22950 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
22951 struct dwarf2_per_cu_data
*per_cu
,
22952 CORE_ADDR (*get_frame_pc
) (void *baton
),
22955 struct dwarf2_cu
*cu
;
22956 struct die_info
*die
;
22957 struct attribute
*attr
;
22958 struct dwarf2_locexpr_baton retval
;
22959 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
22960 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22962 if (per_cu
->cu
== NULL
)
22963 load_cu (per_cu
, false);
22967 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22968 Instead just throw an error, not much else we can do. */
22969 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22970 sect_offset_str (sect_off
), objfile_name (objfile
));
22973 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22975 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22976 sect_offset_str (sect_off
), objfile_name (objfile
));
22978 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22981 /* DWARF: "If there is no such attribute, then there is no effect.".
22982 DATA is ignored if SIZE is 0. */
22984 retval
.data
= NULL
;
22987 else if (attr_form_is_section_offset (attr
))
22989 struct dwarf2_loclist_baton loclist_baton
;
22990 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22993 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
22995 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
22997 retval
.size
= size
;
23001 if (!attr_form_is_block (attr
))
23002 error (_("Dwarf Error: DIE at %s referenced in module %s "
23003 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
23004 sect_offset_str (sect_off
), objfile_name (objfile
));
23006 retval
.data
= DW_BLOCK (attr
)->data
;
23007 retval
.size
= DW_BLOCK (attr
)->size
;
23009 retval
.per_cu
= cu
->per_cu
;
23011 age_cached_comp_units (dwarf2_per_objfile
);
23016 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
23019 struct dwarf2_locexpr_baton
23020 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
23021 struct dwarf2_per_cu_data
*per_cu
,
23022 CORE_ADDR (*get_frame_pc
) (void *baton
),
23025 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
23027 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
23030 /* Write a constant of a given type as target-ordered bytes into
23033 static const gdb_byte
*
23034 write_constant_as_bytes (struct obstack
*obstack
,
23035 enum bfd_endian byte_order
,
23042 *len
= TYPE_LENGTH (type
);
23043 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23044 store_unsigned_integer (result
, *len
, byte_order
, value
);
23049 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
23050 pointer to the constant bytes and set LEN to the length of the
23051 data. If memory is needed, allocate it on OBSTACK. If the DIE
23052 does not have a DW_AT_const_value, return NULL. */
23055 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
23056 struct dwarf2_per_cu_data
*per_cu
,
23057 struct obstack
*obstack
,
23060 struct dwarf2_cu
*cu
;
23061 struct die_info
*die
;
23062 struct attribute
*attr
;
23063 const gdb_byte
*result
= NULL
;
23066 enum bfd_endian byte_order
;
23067 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
23069 if (per_cu
->cu
== NULL
)
23070 load_cu (per_cu
, false);
23074 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23075 Instead just throw an error, not much else we can do. */
23076 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23077 sect_offset_str (sect_off
), objfile_name (objfile
));
23080 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23082 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23083 sect_offset_str (sect_off
), objfile_name (objfile
));
23085 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
23089 byte_order
= (bfd_big_endian (objfile
->obfd
)
23090 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
23092 switch (attr
->form
)
23095 case DW_FORM_GNU_addr_index
:
23099 *len
= cu
->header
.addr_size
;
23100 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23101 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
23105 case DW_FORM_string
:
23107 case DW_FORM_GNU_str_index
:
23108 case DW_FORM_GNU_strp_alt
:
23109 /* DW_STRING is already allocated on the objfile obstack, point
23111 result
= (const gdb_byte
*) DW_STRING (attr
);
23112 *len
= strlen (DW_STRING (attr
));
23114 case DW_FORM_block1
:
23115 case DW_FORM_block2
:
23116 case DW_FORM_block4
:
23117 case DW_FORM_block
:
23118 case DW_FORM_exprloc
:
23119 case DW_FORM_data16
:
23120 result
= DW_BLOCK (attr
)->data
;
23121 *len
= DW_BLOCK (attr
)->size
;
23124 /* The DW_AT_const_value attributes are supposed to carry the
23125 symbol's value "represented as it would be on the target
23126 architecture." By the time we get here, it's already been
23127 converted to host endianness, so we just need to sign- or
23128 zero-extend it as appropriate. */
23129 case DW_FORM_data1
:
23130 type
= die_type (die
, cu
);
23131 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
23132 if (result
== NULL
)
23133 result
= write_constant_as_bytes (obstack
, byte_order
,
23136 case DW_FORM_data2
:
23137 type
= die_type (die
, cu
);
23138 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
23139 if (result
== NULL
)
23140 result
= write_constant_as_bytes (obstack
, byte_order
,
23143 case DW_FORM_data4
:
23144 type
= die_type (die
, cu
);
23145 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
23146 if (result
== NULL
)
23147 result
= write_constant_as_bytes (obstack
, byte_order
,
23150 case DW_FORM_data8
:
23151 type
= die_type (die
, cu
);
23152 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
23153 if (result
== NULL
)
23154 result
= write_constant_as_bytes (obstack
, byte_order
,
23158 case DW_FORM_sdata
:
23159 case DW_FORM_implicit_const
:
23160 type
= die_type (die
, cu
);
23161 result
= write_constant_as_bytes (obstack
, byte_order
,
23162 type
, DW_SND (attr
), len
);
23165 case DW_FORM_udata
:
23166 type
= die_type (die
, cu
);
23167 result
= write_constant_as_bytes (obstack
, byte_order
,
23168 type
, DW_UNSND (attr
), len
);
23172 complaint (&symfile_complaints
,
23173 _("unsupported const value attribute form: '%s'"),
23174 dwarf_form_name (attr
->form
));
23181 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
23182 valid type for this die is found. */
23185 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
23186 struct dwarf2_per_cu_data
*per_cu
)
23188 struct dwarf2_cu
*cu
;
23189 struct die_info
*die
;
23191 if (per_cu
->cu
== NULL
)
23192 load_cu (per_cu
, false);
23197 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23201 return die_type (die
, cu
);
23204 /* Return the type of the DIE at DIE_OFFSET in the CU named by
23208 dwarf2_get_die_type (cu_offset die_offset
,
23209 struct dwarf2_per_cu_data
*per_cu
)
23211 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
23212 return get_die_type_at_offset (die_offset_sect
, per_cu
);
23215 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
23216 On entry *REF_CU is the CU of SRC_DIE.
23217 On exit *REF_CU is the CU of the result.
23218 Returns NULL if the referenced DIE isn't found. */
23220 static struct die_info
*
23221 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
23222 struct dwarf2_cu
**ref_cu
)
23224 struct die_info temp_die
;
23225 struct dwarf2_cu
*sig_cu
;
23226 struct die_info
*die
;
23228 /* While it might be nice to assert sig_type->type == NULL here,
23229 we can get here for DW_AT_imported_declaration where we need
23230 the DIE not the type. */
23232 /* If necessary, add it to the queue and load its DIEs. */
23234 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
23235 read_signatured_type (sig_type
);
23237 sig_cu
= sig_type
->per_cu
.cu
;
23238 gdb_assert (sig_cu
!= NULL
);
23239 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
23240 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
23241 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
23242 to_underlying (temp_die
.sect_off
));
23245 struct dwarf2_per_objfile
*dwarf2_per_objfile
23246 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
23248 /* For .gdb_index version 7 keep track of included TUs.
23249 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
23250 if (dwarf2_per_objfile
->index_table
!= NULL
23251 && dwarf2_per_objfile
->index_table
->version
<= 7)
23253 VEC_safe_push (dwarf2_per_cu_ptr
,
23254 (*ref_cu
)->per_cu
->imported_symtabs
,
23265 /* Follow signatured type referenced by ATTR in SRC_DIE.
23266 On entry *REF_CU is the CU of SRC_DIE.
23267 On exit *REF_CU is the CU of the result.
23268 The result is the DIE of the type.
23269 If the referenced type cannot be found an error is thrown. */
23271 static struct die_info
*
23272 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23273 struct dwarf2_cu
**ref_cu
)
23275 ULONGEST signature
= DW_SIGNATURE (attr
);
23276 struct signatured_type
*sig_type
;
23277 struct die_info
*die
;
23279 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
23281 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
23282 /* sig_type will be NULL if the signatured type is missing from
23284 if (sig_type
== NULL
)
23286 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23287 " from DIE at %s [in module %s]"),
23288 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23289 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23292 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
23295 dump_die_for_error (src_die
);
23296 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23297 " from DIE at %s [in module %s]"),
23298 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23299 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23305 /* Get the type specified by SIGNATURE referenced in DIE/CU,
23306 reading in and processing the type unit if necessary. */
23308 static struct type
*
23309 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
23310 struct dwarf2_cu
*cu
)
23312 struct dwarf2_per_objfile
*dwarf2_per_objfile
23313 = cu
->per_cu
->dwarf2_per_objfile
;
23314 struct signatured_type
*sig_type
;
23315 struct dwarf2_cu
*type_cu
;
23316 struct die_info
*type_die
;
23319 sig_type
= lookup_signatured_type (cu
, signature
);
23320 /* sig_type will be NULL if the signatured type is missing from
23322 if (sig_type
== NULL
)
23324 complaint (&symfile_complaints
,
23325 _("Dwarf Error: Cannot find signatured DIE %s referenced"
23326 " from DIE at %s [in module %s]"),
23327 hex_string (signature
), sect_offset_str (die
->sect_off
),
23328 objfile_name (dwarf2_per_objfile
->objfile
));
23329 return build_error_marker_type (cu
, die
);
23332 /* If we already know the type we're done. */
23333 if (sig_type
->type
!= NULL
)
23334 return sig_type
->type
;
23337 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
23338 if (type_die
!= NULL
)
23340 /* N.B. We need to call get_die_type to ensure only one type for this DIE
23341 is created. This is important, for example, because for c++ classes
23342 we need TYPE_NAME set which is only done by new_symbol. Blech. */
23343 type
= read_type_die (type_die
, type_cu
);
23346 complaint (&symfile_complaints
,
23347 _("Dwarf Error: Cannot build signatured type %s"
23348 " referenced from DIE at %s [in module %s]"),
23349 hex_string (signature
), sect_offset_str (die
->sect_off
),
23350 objfile_name (dwarf2_per_objfile
->objfile
));
23351 type
= build_error_marker_type (cu
, die
);
23356 complaint (&symfile_complaints
,
23357 _("Dwarf Error: Problem reading signatured DIE %s referenced"
23358 " from DIE at %s [in module %s]"),
23359 hex_string (signature
), sect_offset_str (die
->sect_off
),
23360 objfile_name (dwarf2_per_objfile
->objfile
));
23361 type
= build_error_marker_type (cu
, die
);
23363 sig_type
->type
= type
;
23368 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
23369 reading in and processing the type unit if necessary. */
23371 static struct type
*
23372 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
23373 struct dwarf2_cu
*cu
) /* ARI: editCase function */
23375 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
23376 if (attr_form_is_ref (attr
))
23378 struct dwarf2_cu
*type_cu
= cu
;
23379 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
23381 return read_type_die (type_die
, type_cu
);
23383 else if (attr
->form
== DW_FORM_ref_sig8
)
23385 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
23389 struct dwarf2_per_objfile
*dwarf2_per_objfile
23390 = cu
->per_cu
->dwarf2_per_objfile
;
23392 complaint (&symfile_complaints
,
23393 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
23394 " at %s [in module %s]"),
23395 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
23396 objfile_name (dwarf2_per_objfile
->objfile
));
23397 return build_error_marker_type (cu
, die
);
23401 /* Load the DIEs associated with type unit PER_CU into memory. */
23404 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
23406 struct signatured_type
*sig_type
;
23408 /* Caller is responsible for ensuring type_unit_groups don't get here. */
23409 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
23411 /* We have the per_cu, but we need the signatured_type.
23412 Fortunately this is an easy translation. */
23413 gdb_assert (per_cu
->is_debug_types
);
23414 sig_type
= (struct signatured_type
*) per_cu
;
23416 gdb_assert (per_cu
->cu
== NULL
);
23418 read_signatured_type (sig_type
);
23420 gdb_assert (per_cu
->cu
!= NULL
);
23423 /* die_reader_func for read_signatured_type.
23424 This is identical to load_full_comp_unit_reader,
23425 but is kept separate for now. */
23428 read_signatured_type_reader (const struct die_reader_specs
*reader
,
23429 const gdb_byte
*info_ptr
,
23430 struct die_info
*comp_unit_die
,
23434 struct dwarf2_cu
*cu
= reader
->cu
;
23436 gdb_assert (cu
->die_hash
== NULL
);
23438 htab_create_alloc_ex (cu
->header
.length
/ 12,
23442 &cu
->comp_unit_obstack
,
23443 hashtab_obstack_allocate
,
23444 dummy_obstack_deallocate
);
23447 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
23448 &info_ptr
, comp_unit_die
);
23449 cu
->dies
= comp_unit_die
;
23450 /* comp_unit_die is not stored in die_hash, no need. */
23452 /* We try not to read any attributes in this function, because not
23453 all CUs needed for references have been loaded yet, and symbol
23454 table processing isn't initialized. But we have to set the CU language,
23455 or we won't be able to build types correctly.
23456 Similarly, if we do not read the producer, we can not apply
23457 producer-specific interpretation. */
23458 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
23461 /* Read in a signatured type and build its CU and DIEs.
23462 If the type is a stub for the real type in a DWO file,
23463 read in the real type from the DWO file as well. */
23466 read_signatured_type (struct signatured_type
*sig_type
)
23468 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
23470 gdb_assert (per_cu
->is_debug_types
);
23471 gdb_assert (per_cu
->cu
== NULL
);
23473 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1, false,
23474 read_signatured_type_reader
, NULL
);
23475 sig_type
->per_cu
.tu_read
= 1;
23478 /* Decode simple location descriptions.
23479 Given a pointer to a dwarf block that defines a location, compute
23480 the location and return the value.
23482 NOTE drow/2003-11-18: This function is called in two situations
23483 now: for the address of static or global variables (partial symbols
23484 only) and for offsets into structures which are expected to be
23485 (more or less) constant. The partial symbol case should go away,
23486 and only the constant case should remain. That will let this
23487 function complain more accurately. A few special modes are allowed
23488 without complaint for global variables (for instance, global
23489 register values and thread-local values).
23491 A location description containing no operations indicates that the
23492 object is optimized out. The return value is 0 for that case.
23493 FIXME drow/2003-11-16: No callers check for this case any more; soon all
23494 callers will only want a very basic result and this can become a
23497 Note that stack[0] is unused except as a default error return. */
23500 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
23502 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
23504 size_t size
= blk
->size
;
23505 const gdb_byte
*data
= blk
->data
;
23506 CORE_ADDR stack
[64];
23508 unsigned int bytes_read
, unsnd
;
23514 stack
[++stacki
] = 0;
23553 stack
[++stacki
] = op
- DW_OP_lit0
;
23588 stack
[++stacki
] = op
- DW_OP_reg0
;
23590 dwarf2_complex_location_expr_complaint ();
23594 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
23596 stack
[++stacki
] = unsnd
;
23598 dwarf2_complex_location_expr_complaint ();
23602 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
23607 case DW_OP_const1u
:
23608 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
23612 case DW_OP_const1s
:
23613 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
23617 case DW_OP_const2u
:
23618 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
23622 case DW_OP_const2s
:
23623 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
23627 case DW_OP_const4u
:
23628 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
23632 case DW_OP_const4s
:
23633 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
23637 case DW_OP_const8u
:
23638 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
23643 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
23649 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
23654 stack
[stacki
+ 1] = stack
[stacki
];
23659 stack
[stacki
- 1] += stack
[stacki
];
23663 case DW_OP_plus_uconst
:
23664 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
23670 stack
[stacki
- 1] -= stack
[stacki
];
23675 /* If we're not the last op, then we definitely can't encode
23676 this using GDB's address_class enum. This is valid for partial
23677 global symbols, although the variable's address will be bogus
23680 dwarf2_complex_location_expr_complaint ();
23683 case DW_OP_GNU_push_tls_address
:
23684 case DW_OP_form_tls_address
:
23685 /* The top of the stack has the offset from the beginning
23686 of the thread control block at which the variable is located. */
23687 /* Nothing should follow this operator, so the top of stack would
23689 /* This is valid for partial global symbols, but the variable's
23690 address will be bogus in the psymtab. Make it always at least
23691 non-zero to not look as a variable garbage collected by linker
23692 which have DW_OP_addr 0. */
23694 dwarf2_complex_location_expr_complaint ();
23698 case DW_OP_GNU_uninit
:
23701 case DW_OP_GNU_addr_index
:
23702 case DW_OP_GNU_const_index
:
23703 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
23710 const char *name
= get_DW_OP_name (op
);
23713 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
23716 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
23720 return (stack
[stacki
]);
23723 /* Enforce maximum stack depth of SIZE-1 to avoid writing
23724 outside of the allocated space. Also enforce minimum>0. */
23725 if (stacki
>= ARRAY_SIZE (stack
) - 1)
23727 complaint (&symfile_complaints
,
23728 _("location description stack overflow"));
23734 complaint (&symfile_complaints
,
23735 _("location description stack underflow"));
23739 return (stack
[stacki
]);
23742 /* memory allocation interface */
23744 static struct dwarf_block
*
23745 dwarf_alloc_block (struct dwarf2_cu
*cu
)
23747 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
23750 static struct die_info
*
23751 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
23753 struct die_info
*die
;
23754 size_t size
= sizeof (struct die_info
);
23757 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
23759 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
23760 memset (die
, 0, sizeof (struct die_info
));
23765 /* Macro support. */
23767 /* Return file name relative to the compilation directory of file number I in
23768 *LH's file name table. The result is allocated using xmalloc; the caller is
23769 responsible for freeing it. */
23772 file_file_name (int file
, struct line_header
*lh
)
23774 /* Is the file number a valid index into the line header's file name
23775 table? Remember that file numbers start with one, not zero. */
23776 if (1 <= file
&& file
<= lh
->file_names
.size ())
23778 const file_entry
&fe
= lh
->file_names
[file
- 1];
23780 if (!IS_ABSOLUTE_PATH (fe
.name
))
23782 const char *dir
= fe
.include_dir (lh
);
23784 return concat (dir
, SLASH_STRING
, fe
.name
, (char *) NULL
);
23786 return xstrdup (fe
.name
);
23790 /* The compiler produced a bogus file number. We can at least
23791 record the macro definitions made in the file, even if we
23792 won't be able to find the file by name. */
23793 char fake_name
[80];
23795 xsnprintf (fake_name
, sizeof (fake_name
),
23796 "<bad macro file number %d>", file
);
23798 complaint (&symfile_complaints
,
23799 _("bad file number in macro information (%d)"),
23802 return xstrdup (fake_name
);
23806 /* Return the full name of file number I in *LH's file name table.
23807 Use COMP_DIR as the name of the current directory of the
23808 compilation. The result is allocated using xmalloc; the caller is
23809 responsible for freeing it. */
23811 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
23813 /* Is the file number a valid index into the line header's file name
23814 table? Remember that file numbers start with one, not zero. */
23815 if (1 <= file
&& file
<= lh
->file_names
.size ())
23817 char *relative
= file_file_name (file
, lh
);
23819 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
23821 return reconcat (relative
, comp_dir
, SLASH_STRING
,
23822 relative
, (char *) NULL
);
23825 return file_file_name (file
, lh
);
23829 static struct macro_source_file
*
23830 macro_start_file (int file
, int line
,
23831 struct macro_source_file
*current_file
,
23832 struct line_header
*lh
)
23834 /* File name relative to the compilation directory of this source file. */
23835 char *file_name
= file_file_name (file
, lh
);
23837 if (! current_file
)
23839 /* Note: We don't create a macro table for this compilation unit
23840 at all until we actually get a filename. */
23841 struct macro_table
*macro_table
= get_macro_table ();
23843 /* If we have no current file, then this must be the start_file
23844 directive for the compilation unit's main source file. */
23845 current_file
= macro_set_main (macro_table
, file_name
);
23846 macro_define_special (macro_table
);
23849 current_file
= macro_include (current_file
, line
, file_name
);
23853 return current_file
;
23856 static const char *
23857 consume_improper_spaces (const char *p
, const char *body
)
23861 complaint (&symfile_complaints
,
23862 _("macro definition contains spaces "
23863 "in formal argument list:\n`%s'"),
23875 parse_macro_definition (struct macro_source_file
*file
, int line
,
23880 /* The body string takes one of two forms. For object-like macro
23881 definitions, it should be:
23883 <macro name> " " <definition>
23885 For function-like macro definitions, it should be:
23887 <macro name> "() " <definition>
23889 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
23891 Spaces may appear only where explicitly indicated, and in the
23894 The Dwarf 2 spec says that an object-like macro's name is always
23895 followed by a space, but versions of GCC around March 2002 omit
23896 the space when the macro's definition is the empty string.
23898 The Dwarf 2 spec says that there should be no spaces between the
23899 formal arguments in a function-like macro's formal argument list,
23900 but versions of GCC around March 2002 include spaces after the
23904 /* Find the extent of the macro name. The macro name is terminated
23905 by either a space or null character (for an object-like macro) or
23906 an opening paren (for a function-like macro). */
23907 for (p
= body
; *p
; p
++)
23908 if (*p
== ' ' || *p
== '(')
23911 if (*p
== ' ' || *p
== '\0')
23913 /* It's an object-like macro. */
23914 int name_len
= p
- body
;
23915 char *name
= savestring (body
, name_len
);
23916 const char *replacement
;
23919 replacement
= body
+ name_len
+ 1;
23922 dwarf2_macro_malformed_definition_complaint (body
);
23923 replacement
= body
+ name_len
;
23926 macro_define_object (file
, line
, name
, replacement
);
23930 else if (*p
== '(')
23932 /* It's a function-like macro. */
23933 char *name
= savestring (body
, p
- body
);
23936 char **argv
= XNEWVEC (char *, argv_size
);
23940 p
= consume_improper_spaces (p
, body
);
23942 /* Parse the formal argument list. */
23943 while (*p
&& *p
!= ')')
23945 /* Find the extent of the current argument name. */
23946 const char *arg_start
= p
;
23948 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
23951 if (! *p
|| p
== arg_start
)
23952 dwarf2_macro_malformed_definition_complaint (body
);
23955 /* Make sure argv has room for the new argument. */
23956 if (argc
>= argv_size
)
23959 argv
= XRESIZEVEC (char *, argv
, argv_size
);
23962 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
23965 p
= consume_improper_spaces (p
, body
);
23967 /* Consume the comma, if present. */
23972 p
= consume_improper_spaces (p
, body
);
23981 /* Perfectly formed definition, no complaints. */
23982 macro_define_function (file
, line
, name
,
23983 argc
, (const char **) argv
,
23985 else if (*p
== '\0')
23987 /* Complain, but do define it. */
23988 dwarf2_macro_malformed_definition_complaint (body
);
23989 macro_define_function (file
, line
, name
,
23990 argc
, (const char **) argv
,
23994 /* Just complain. */
23995 dwarf2_macro_malformed_definition_complaint (body
);
23998 /* Just complain. */
23999 dwarf2_macro_malformed_definition_complaint (body
);
24005 for (i
= 0; i
< argc
; i
++)
24011 dwarf2_macro_malformed_definition_complaint (body
);
24014 /* Skip some bytes from BYTES according to the form given in FORM.
24015 Returns the new pointer. */
24017 static const gdb_byte
*
24018 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
24019 enum dwarf_form form
,
24020 unsigned int offset_size
,
24021 struct dwarf2_section_info
*section
)
24023 unsigned int bytes_read
;
24027 case DW_FORM_data1
:
24032 case DW_FORM_data2
:
24036 case DW_FORM_data4
:
24040 case DW_FORM_data8
:
24044 case DW_FORM_data16
:
24048 case DW_FORM_string
:
24049 read_direct_string (abfd
, bytes
, &bytes_read
);
24050 bytes
+= bytes_read
;
24053 case DW_FORM_sec_offset
:
24055 case DW_FORM_GNU_strp_alt
:
24056 bytes
+= offset_size
;
24059 case DW_FORM_block
:
24060 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
24061 bytes
+= bytes_read
;
24064 case DW_FORM_block1
:
24065 bytes
+= 1 + read_1_byte (abfd
, bytes
);
24067 case DW_FORM_block2
:
24068 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
24070 case DW_FORM_block4
:
24071 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
24074 case DW_FORM_sdata
:
24075 case DW_FORM_udata
:
24076 case DW_FORM_GNU_addr_index
:
24077 case DW_FORM_GNU_str_index
:
24078 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
24081 dwarf2_section_buffer_overflow_complaint (section
);
24086 case DW_FORM_implicit_const
:
24091 complaint (&symfile_complaints
,
24092 _("invalid form 0x%x in `%s'"),
24093 form
, get_section_name (section
));
24101 /* A helper for dwarf_decode_macros that handles skipping an unknown
24102 opcode. Returns an updated pointer to the macro data buffer; or,
24103 on error, issues a complaint and returns NULL. */
24105 static const gdb_byte
*
24106 skip_unknown_opcode (unsigned int opcode
,
24107 const gdb_byte
**opcode_definitions
,
24108 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24110 unsigned int offset_size
,
24111 struct dwarf2_section_info
*section
)
24113 unsigned int bytes_read
, i
;
24115 const gdb_byte
*defn
;
24117 if (opcode_definitions
[opcode
] == NULL
)
24119 complaint (&symfile_complaints
,
24120 _("unrecognized DW_MACFINO opcode 0x%x"),
24125 defn
= opcode_definitions
[opcode
];
24126 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
24127 defn
+= bytes_read
;
24129 for (i
= 0; i
< arg
; ++i
)
24131 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
24132 (enum dwarf_form
) defn
[i
], offset_size
,
24134 if (mac_ptr
== NULL
)
24136 /* skip_form_bytes already issued the complaint. */
24144 /* A helper function which parses the header of a macro section.
24145 If the macro section is the extended (for now called "GNU") type,
24146 then this updates *OFFSET_SIZE. Returns a pointer to just after
24147 the header, or issues a complaint and returns NULL on error. */
24149 static const gdb_byte
*
24150 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
24152 const gdb_byte
*mac_ptr
,
24153 unsigned int *offset_size
,
24154 int section_is_gnu
)
24156 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
24158 if (section_is_gnu
)
24160 unsigned int version
, flags
;
24162 version
= read_2_bytes (abfd
, mac_ptr
);
24163 if (version
!= 4 && version
!= 5)
24165 complaint (&symfile_complaints
,
24166 _("unrecognized version `%d' in .debug_macro section"),
24172 flags
= read_1_byte (abfd
, mac_ptr
);
24174 *offset_size
= (flags
& 1) ? 8 : 4;
24176 if ((flags
& 2) != 0)
24177 /* We don't need the line table offset. */
24178 mac_ptr
+= *offset_size
;
24180 /* Vendor opcode descriptions. */
24181 if ((flags
& 4) != 0)
24183 unsigned int i
, count
;
24185 count
= read_1_byte (abfd
, mac_ptr
);
24187 for (i
= 0; i
< count
; ++i
)
24189 unsigned int opcode
, bytes_read
;
24192 opcode
= read_1_byte (abfd
, mac_ptr
);
24194 opcode_definitions
[opcode
] = mac_ptr
;
24195 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24196 mac_ptr
+= bytes_read
;
24205 /* A helper for dwarf_decode_macros that handles the GNU extensions,
24206 including DW_MACRO_import. */
24209 dwarf_decode_macro_bytes (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
24211 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24212 struct macro_source_file
*current_file
,
24213 struct line_header
*lh
,
24214 struct dwarf2_section_info
*section
,
24215 int section_is_gnu
, int section_is_dwz
,
24216 unsigned int offset_size
,
24217 htab_t include_hash
)
24219 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24220 enum dwarf_macro_record_type macinfo_type
;
24221 int at_commandline
;
24222 const gdb_byte
*opcode_definitions
[256];
24224 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24225 &offset_size
, section_is_gnu
);
24226 if (mac_ptr
== NULL
)
24228 /* We already issued a complaint. */
24232 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
24233 GDB is still reading the definitions from command line. First
24234 DW_MACINFO_start_file will need to be ignored as it was already executed
24235 to create CURRENT_FILE for the main source holding also the command line
24236 definitions. On first met DW_MACINFO_start_file this flag is reset to
24237 normally execute all the remaining DW_MACINFO_start_file macinfos. */
24239 at_commandline
= 1;
24243 /* Do we at least have room for a macinfo type byte? */
24244 if (mac_ptr
>= mac_end
)
24246 dwarf2_section_buffer_overflow_complaint (section
);
24250 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24253 /* Note that we rely on the fact that the corresponding GNU and
24254 DWARF constants are the same. */
24256 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24257 switch (macinfo_type
)
24259 /* A zero macinfo type indicates the end of the macro
24264 case DW_MACRO_define
:
24265 case DW_MACRO_undef
:
24266 case DW_MACRO_define_strp
:
24267 case DW_MACRO_undef_strp
:
24268 case DW_MACRO_define_sup
:
24269 case DW_MACRO_undef_sup
:
24271 unsigned int bytes_read
;
24276 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24277 mac_ptr
+= bytes_read
;
24279 if (macinfo_type
== DW_MACRO_define
24280 || macinfo_type
== DW_MACRO_undef
)
24282 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24283 mac_ptr
+= bytes_read
;
24287 LONGEST str_offset
;
24289 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24290 mac_ptr
+= offset_size
;
24292 if (macinfo_type
== DW_MACRO_define_sup
24293 || macinfo_type
== DW_MACRO_undef_sup
24296 struct dwz_file
*dwz
24297 = dwarf2_get_dwz_file (dwarf2_per_objfile
);
24299 body
= read_indirect_string_from_dwz (objfile
,
24303 body
= read_indirect_string_at_offset (dwarf2_per_objfile
,
24307 is_define
= (macinfo_type
== DW_MACRO_define
24308 || macinfo_type
== DW_MACRO_define_strp
24309 || macinfo_type
== DW_MACRO_define_sup
);
24310 if (! current_file
)
24312 /* DWARF violation as no main source is present. */
24313 complaint (&symfile_complaints
,
24314 _("debug info with no main source gives macro %s "
24316 is_define
? _("definition") : _("undefinition"),
24320 if ((line
== 0 && !at_commandline
)
24321 || (line
!= 0 && at_commandline
))
24322 complaint (&symfile_complaints
,
24323 _("debug info gives %s macro %s with %s line %d: %s"),
24324 at_commandline
? _("command-line") : _("in-file"),
24325 is_define
? _("definition") : _("undefinition"),
24326 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
24329 parse_macro_definition (current_file
, line
, body
);
24332 gdb_assert (macinfo_type
== DW_MACRO_undef
24333 || macinfo_type
== DW_MACRO_undef_strp
24334 || macinfo_type
== DW_MACRO_undef_sup
);
24335 macro_undef (current_file
, line
, body
);
24340 case DW_MACRO_start_file
:
24342 unsigned int bytes_read
;
24345 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24346 mac_ptr
+= bytes_read
;
24347 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24348 mac_ptr
+= bytes_read
;
24350 if ((line
== 0 && !at_commandline
)
24351 || (line
!= 0 && at_commandline
))
24352 complaint (&symfile_complaints
,
24353 _("debug info gives source %d included "
24354 "from %s at %s line %d"),
24355 file
, at_commandline
? _("command-line") : _("file"),
24356 line
== 0 ? _("zero") : _("non-zero"), line
);
24358 if (at_commandline
)
24360 /* This DW_MACRO_start_file was executed in the
24362 at_commandline
= 0;
24365 current_file
= macro_start_file (file
, line
, current_file
, lh
);
24369 case DW_MACRO_end_file
:
24370 if (! current_file
)
24371 complaint (&symfile_complaints
,
24372 _("macro debug info has an unmatched "
24373 "`close_file' directive"));
24376 current_file
= current_file
->included_by
;
24377 if (! current_file
)
24379 enum dwarf_macro_record_type next_type
;
24381 /* GCC circa March 2002 doesn't produce the zero
24382 type byte marking the end of the compilation
24383 unit. Complain if it's not there, but exit no
24386 /* Do we at least have room for a macinfo type byte? */
24387 if (mac_ptr
>= mac_end
)
24389 dwarf2_section_buffer_overflow_complaint (section
);
24393 /* We don't increment mac_ptr here, so this is just
24396 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
24398 if (next_type
!= 0)
24399 complaint (&symfile_complaints
,
24400 _("no terminating 0-type entry for "
24401 "macros in `.debug_macinfo' section"));
24408 case DW_MACRO_import
:
24409 case DW_MACRO_import_sup
:
24413 bfd
*include_bfd
= abfd
;
24414 struct dwarf2_section_info
*include_section
= section
;
24415 const gdb_byte
*include_mac_end
= mac_end
;
24416 int is_dwz
= section_is_dwz
;
24417 const gdb_byte
*new_mac_ptr
;
24419 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24420 mac_ptr
+= offset_size
;
24422 if (macinfo_type
== DW_MACRO_import_sup
)
24424 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
24426 dwarf2_read_section (objfile
, &dwz
->macro
);
24428 include_section
= &dwz
->macro
;
24429 include_bfd
= get_section_bfd_owner (include_section
);
24430 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
24434 new_mac_ptr
= include_section
->buffer
+ offset
;
24435 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
24439 /* This has actually happened; see
24440 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
24441 complaint (&symfile_complaints
,
24442 _("recursive DW_MACRO_import in "
24443 ".debug_macro section"));
24447 *slot
= (void *) new_mac_ptr
;
24449 dwarf_decode_macro_bytes (dwarf2_per_objfile
,
24450 include_bfd
, new_mac_ptr
,
24451 include_mac_end
, current_file
, lh
,
24452 section
, section_is_gnu
, is_dwz
,
24453 offset_size
, include_hash
);
24455 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
24460 case DW_MACINFO_vendor_ext
:
24461 if (!section_is_gnu
)
24463 unsigned int bytes_read
;
24465 /* This reads the constant, but since we don't recognize
24466 any vendor extensions, we ignore it. */
24467 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24468 mac_ptr
+= bytes_read
;
24469 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24470 mac_ptr
+= bytes_read
;
24472 /* We don't recognize any vendor extensions. */
24478 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24479 mac_ptr
, mac_end
, abfd
, offset_size
,
24481 if (mac_ptr
== NULL
)
24486 } while (macinfo_type
!= 0);
24490 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
24491 int section_is_gnu
)
24493 struct dwarf2_per_objfile
*dwarf2_per_objfile
24494 = cu
->per_cu
->dwarf2_per_objfile
;
24495 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24496 struct line_header
*lh
= cu
->line_header
;
24498 const gdb_byte
*mac_ptr
, *mac_end
;
24499 struct macro_source_file
*current_file
= 0;
24500 enum dwarf_macro_record_type macinfo_type
;
24501 unsigned int offset_size
= cu
->header
.offset_size
;
24502 const gdb_byte
*opcode_definitions
[256];
24504 struct dwarf2_section_info
*section
;
24505 const char *section_name
;
24507 if (cu
->dwo_unit
!= NULL
)
24509 if (section_is_gnu
)
24511 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
24512 section_name
= ".debug_macro.dwo";
24516 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
24517 section_name
= ".debug_macinfo.dwo";
24522 if (section_is_gnu
)
24524 section
= &dwarf2_per_objfile
->macro
;
24525 section_name
= ".debug_macro";
24529 section
= &dwarf2_per_objfile
->macinfo
;
24530 section_name
= ".debug_macinfo";
24534 dwarf2_read_section (objfile
, section
);
24535 if (section
->buffer
== NULL
)
24537 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
24540 abfd
= get_section_bfd_owner (section
);
24542 /* First pass: Find the name of the base filename.
24543 This filename is needed in order to process all macros whose definition
24544 (or undefinition) comes from the command line. These macros are defined
24545 before the first DW_MACINFO_start_file entry, and yet still need to be
24546 associated to the base file.
24548 To determine the base file name, we scan the macro definitions until we
24549 reach the first DW_MACINFO_start_file entry. We then initialize
24550 CURRENT_FILE accordingly so that any macro definition found before the
24551 first DW_MACINFO_start_file can still be associated to the base file. */
24553 mac_ptr
= section
->buffer
+ offset
;
24554 mac_end
= section
->buffer
+ section
->size
;
24556 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24557 &offset_size
, section_is_gnu
);
24558 if (mac_ptr
== NULL
)
24560 /* We already issued a complaint. */
24566 /* Do we at least have room for a macinfo type byte? */
24567 if (mac_ptr
>= mac_end
)
24569 /* Complaint is printed during the second pass as GDB will probably
24570 stop the first pass earlier upon finding
24571 DW_MACINFO_start_file. */
24575 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24578 /* Note that we rely on the fact that the corresponding GNU and
24579 DWARF constants are the same. */
24581 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24582 switch (macinfo_type
)
24584 /* A zero macinfo type indicates the end of the macro
24589 case DW_MACRO_define
:
24590 case DW_MACRO_undef
:
24591 /* Only skip the data by MAC_PTR. */
24593 unsigned int bytes_read
;
24595 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24596 mac_ptr
+= bytes_read
;
24597 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24598 mac_ptr
+= bytes_read
;
24602 case DW_MACRO_start_file
:
24604 unsigned int bytes_read
;
24607 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24608 mac_ptr
+= bytes_read
;
24609 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24610 mac_ptr
+= bytes_read
;
24612 current_file
= macro_start_file (file
, line
, current_file
, lh
);
24616 case DW_MACRO_end_file
:
24617 /* No data to skip by MAC_PTR. */
24620 case DW_MACRO_define_strp
:
24621 case DW_MACRO_undef_strp
:
24622 case DW_MACRO_define_sup
:
24623 case DW_MACRO_undef_sup
:
24625 unsigned int bytes_read
;
24627 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24628 mac_ptr
+= bytes_read
;
24629 mac_ptr
+= offset_size
;
24633 case DW_MACRO_import
:
24634 case DW_MACRO_import_sup
:
24635 /* Note that, according to the spec, a transparent include
24636 chain cannot call DW_MACRO_start_file. So, we can just
24637 skip this opcode. */
24638 mac_ptr
+= offset_size
;
24641 case DW_MACINFO_vendor_ext
:
24642 /* Only skip the data by MAC_PTR. */
24643 if (!section_is_gnu
)
24645 unsigned int bytes_read
;
24647 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24648 mac_ptr
+= bytes_read
;
24649 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24650 mac_ptr
+= bytes_read
;
24655 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24656 mac_ptr
, mac_end
, abfd
, offset_size
,
24658 if (mac_ptr
== NULL
)
24663 } while (macinfo_type
!= 0 && current_file
== NULL
);
24665 /* Second pass: Process all entries.
24667 Use the AT_COMMAND_LINE flag to determine whether we are still processing
24668 command-line macro definitions/undefinitions. This flag is unset when we
24669 reach the first DW_MACINFO_start_file entry. */
24671 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
24673 NULL
, xcalloc
, xfree
));
24674 mac_ptr
= section
->buffer
+ offset
;
24675 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
24676 *slot
= (void *) mac_ptr
;
24677 dwarf_decode_macro_bytes (dwarf2_per_objfile
,
24678 abfd
, mac_ptr
, mac_end
,
24679 current_file
, lh
, section
,
24680 section_is_gnu
, 0, offset_size
,
24681 include_hash
.get ());
24684 /* Check if the attribute's form is a DW_FORM_block*
24685 if so return true else false. */
24688 attr_form_is_block (const struct attribute
*attr
)
24690 return (attr
== NULL
? 0 :
24691 attr
->form
== DW_FORM_block1
24692 || attr
->form
== DW_FORM_block2
24693 || attr
->form
== DW_FORM_block4
24694 || attr
->form
== DW_FORM_block
24695 || attr
->form
== DW_FORM_exprloc
);
24698 /* Return non-zero if ATTR's value is a section offset --- classes
24699 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
24700 You may use DW_UNSND (attr) to retrieve such offsets.
24702 Section 7.5.4, "Attribute Encodings", explains that no attribute
24703 may have a value that belongs to more than one of these classes; it
24704 would be ambiguous if we did, because we use the same forms for all
24708 attr_form_is_section_offset (const struct attribute
*attr
)
24710 return (attr
->form
== DW_FORM_data4
24711 || attr
->form
== DW_FORM_data8
24712 || attr
->form
== DW_FORM_sec_offset
);
24715 /* Return non-zero if ATTR's value falls in the 'constant' class, or
24716 zero otherwise. When this function returns true, you can apply
24717 dwarf2_get_attr_constant_value to it.
24719 However, note that for some attributes you must check
24720 attr_form_is_section_offset before using this test. DW_FORM_data4
24721 and DW_FORM_data8 are members of both the constant class, and of
24722 the classes that contain offsets into other debug sections
24723 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
24724 that, if an attribute's can be either a constant or one of the
24725 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
24726 taken as section offsets, not constants.
24728 DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
24729 cannot handle that. */
24732 attr_form_is_constant (const struct attribute
*attr
)
24734 switch (attr
->form
)
24736 case DW_FORM_sdata
:
24737 case DW_FORM_udata
:
24738 case DW_FORM_data1
:
24739 case DW_FORM_data2
:
24740 case DW_FORM_data4
:
24741 case DW_FORM_data8
:
24742 case DW_FORM_implicit_const
:
24750 /* DW_ADDR is always stored already as sect_offset; despite for the forms
24751 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
24754 attr_form_is_ref (const struct attribute
*attr
)
24756 switch (attr
->form
)
24758 case DW_FORM_ref_addr
:
24763 case DW_FORM_ref_udata
:
24764 case DW_FORM_GNU_ref_alt
:
24771 /* Return the .debug_loc section to use for CU.
24772 For DWO files use .debug_loc.dwo. */
24774 static struct dwarf2_section_info
*
24775 cu_debug_loc_section (struct dwarf2_cu
*cu
)
24777 struct dwarf2_per_objfile
*dwarf2_per_objfile
24778 = cu
->per_cu
->dwarf2_per_objfile
;
24782 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
24784 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
24786 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
24787 : &dwarf2_per_objfile
->loc
);
24790 /* A helper function that fills in a dwarf2_loclist_baton. */
24793 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
24794 struct dwarf2_loclist_baton
*baton
,
24795 const struct attribute
*attr
)
24797 struct dwarf2_per_objfile
*dwarf2_per_objfile
24798 = cu
->per_cu
->dwarf2_per_objfile
;
24799 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24801 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
24803 baton
->per_cu
= cu
->per_cu
;
24804 gdb_assert (baton
->per_cu
);
24805 /* We don't know how long the location list is, but make sure we
24806 don't run off the edge of the section. */
24807 baton
->size
= section
->size
- DW_UNSND (attr
);
24808 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
24809 baton
->base_address
= cu
->base_address
;
24810 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
24814 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
24815 struct dwarf2_cu
*cu
, int is_block
)
24817 struct dwarf2_per_objfile
*dwarf2_per_objfile
24818 = cu
->per_cu
->dwarf2_per_objfile
;
24819 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24820 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24822 if (attr_form_is_section_offset (attr
)
24823 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
24824 the section. If so, fall through to the complaint in the
24826 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
24828 struct dwarf2_loclist_baton
*baton
;
24830 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
24832 fill_in_loclist_baton (cu
, baton
, attr
);
24834 if (cu
->base_known
== 0)
24835 complaint (&symfile_complaints
,
24836 _("Location list used without "
24837 "specifying the CU base address."));
24839 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24840 ? dwarf2_loclist_block_index
24841 : dwarf2_loclist_index
);
24842 SYMBOL_LOCATION_BATON (sym
) = baton
;
24846 struct dwarf2_locexpr_baton
*baton
;
24848 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
24849 baton
->per_cu
= cu
->per_cu
;
24850 gdb_assert (baton
->per_cu
);
24852 if (attr_form_is_block (attr
))
24854 /* Note that we're just copying the block's data pointer
24855 here, not the actual data. We're still pointing into the
24856 info_buffer for SYM's objfile; right now we never release
24857 that buffer, but when we do clean up properly this may
24859 baton
->size
= DW_BLOCK (attr
)->size
;
24860 baton
->data
= DW_BLOCK (attr
)->data
;
24864 dwarf2_invalid_attrib_class_complaint ("location description",
24865 SYMBOL_NATURAL_NAME (sym
));
24869 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24870 ? dwarf2_locexpr_block_index
24871 : dwarf2_locexpr_index
);
24872 SYMBOL_LOCATION_BATON (sym
) = baton
;
24876 /* Return the OBJFILE associated with the compilation unit CU. If CU
24877 came from a separate debuginfo file, then the master objfile is
24881 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
24883 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24885 /* Return the master objfile, so that we can report and look up the
24886 correct file containing this variable. */
24887 if (objfile
->separate_debug_objfile_backlink
)
24888 objfile
= objfile
->separate_debug_objfile_backlink
;
24893 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
24894 (CU_HEADERP is unused in such case) or prepare a temporary copy at
24895 CU_HEADERP first. */
24897 static const struct comp_unit_head
*
24898 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
24899 struct dwarf2_per_cu_data
*per_cu
)
24901 const gdb_byte
*info_ptr
;
24904 return &per_cu
->cu
->header
;
24906 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
24908 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
24909 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
24910 rcuh_kind::COMPILE
);
24915 /* Return the address size given in the compilation unit header for CU. */
24918 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24920 struct comp_unit_head cu_header_local
;
24921 const struct comp_unit_head
*cu_headerp
;
24923 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24925 return cu_headerp
->addr_size
;
24928 /* Return the offset size given in the compilation unit header for CU. */
24931 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
24933 struct comp_unit_head cu_header_local
;
24934 const struct comp_unit_head
*cu_headerp
;
24936 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24938 return cu_headerp
->offset_size
;
24941 /* See its dwarf2loc.h declaration. */
24944 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24946 struct comp_unit_head cu_header_local
;
24947 const struct comp_unit_head
*cu_headerp
;
24949 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24951 if (cu_headerp
->version
== 2)
24952 return cu_headerp
->addr_size
;
24954 return cu_headerp
->offset_size
;
24957 /* Return the text offset of the CU. The returned offset comes from
24958 this CU's objfile. If this objfile came from a separate debuginfo
24959 file, then the offset may be different from the corresponding
24960 offset in the parent objfile. */
24963 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
24965 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24967 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
24970 /* Return DWARF version number of PER_CU. */
24973 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
24975 return per_cu
->dwarf_version
;
24978 /* Locate the .debug_info compilation unit from CU's objfile which contains
24979 the DIE at OFFSET. Raises an error on failure. */
24981 static struct dwarf2_per_cu_data
*
24982 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
24983 unsigned int offset_in_dwz
,
24984 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
24986 struct dwarf2_per_cu_data
*this_cu
;
24988 const sect_offset
*cu_off
;
24991 high
= dwarf2_per_objfile
->all_comp_units
.size () - 1;
24994 struct dwarf2_per_cu_data
*mid_cu
;
24995 int mid
= low
+ (high
- low
) / 2;
24997 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
24998 cu_off
= &mid_cu
->sect_off
;
24999 if (mid_cu
->is_dwz
> offset_in_dwz
25000 || (mid_cu
->is_dwz
== offset_in_dwz
&& *cu_off
>= sect_off
))
25005 gdb_assert (low
== high
);
25006 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
25007 cu_off
= &this_cu
->sect_off
;
25008 if (this_cu
->is_dwz
!= offset_in_dwz
|| *cu_off
> sect_off
)
25010 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
25011 error (_("Dwarf Error: could not find partial DIE containing "
25012 "offset %s [in module %s]"),
25013 sect_offset_str (sect_off
),
25014 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
25016 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
25018 return dwarf2_per_objfile
->all_comp_units
[low
-1];
25022 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
25023 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
25024 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
25025 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
25026 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
25031 /* Initialize dwarf2_cu CU, owned by PER_CU. */
25033 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
25034 : per_cu (per_cu_
),
25037 checked_producer (0),
25038 producer_is_gxx_lt_4_6 (0),
25039 producer_is_gcc_lt_4_3 (0),
25040 producer_is_icc_lt_14 (0),
25041 processing_has_namespace_info (0)
25046 /* Destroy a dwarf2_cu. */
25048 dwarf2_cu::~dwarf2_cu ()
25053 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
25056 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
25057 enum language pretend_language
)
25059 struct attribute
*attr
;
25061 /* Set the language we're debugging. */
25062 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
25064 set_cu_language (DW_UNSND (attr
), cu
);
25067 cu
->language
= pretend_language
;
25068 cu
->language_defn
= language_def (cu
->language
);
25071 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
25074 /* Increase the age counter on each cached compilation unit, and free
25075 any that are too old. */
25078 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25080 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25082 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
25083 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25084 while (per_cu
!= NULL
)
25086 per_cu
->cu
->last_used
++;
25087 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
25088 dwarf2_mark (per_cu
->cu
);
25089 per_cu
= per_cu
->cu
->read_in_chain
;
25092 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25093 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25094 while (per_cu
!= NULL
)
25096 struct dwarf2_per_cu_data
*next_cu
;
25098 next_cu
= per_cu
->cu
->read_in_chain
;
25100 if (!per_cu
->cu
->mark
)
25103 *last_chain
= next_cu
;
25106 last_chain
= &per_cu
->cu
->read_in_chain
;
25112 /* Remove a single compilation unit from the cache. */
25115 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
25117 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25118 struct dwarf2_per_objfile
*dwarf2_per_objfile
25119 = target_per_cu
->dwarf2_per_objfile
;
25121 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25122 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25123 while (per_cu
!= NULL
)
25125 struct dwarf2_per_cu_data
*next_cu
;
25127 next_cu
= per_cu
->cu
->read_in_chain
;
25129 if (per_cu
== target_per_cu
)
25133 *last_chain
= next_cu
;
25137 last_chain
= &per_cu
->cu
->read_in_chain
;
25143 /* Release all extra memory associated with OBJFILE. */
25146 dwarf2_free_objfile (struct objfile
*objfile
)
25148 struct dwarf2_per_objfile
*dwarf2_per_objfile
25149 = get_dwarf2_per_objfile (objfile
);
25151 delete dwarf2_per_objfile
;
25154 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
25155 We store these in a hash table separate from the DIEs, and preserve them
25156 when the DIEs are flushed out of cache.
25158 The CU "per_cu" pointer is needed because offset alone is not enough to
25159 uniquely identify the type. A file may have multiple .debug_types sections,
25160 or the type may come from a DWO file. Furthermore, while it's more logical
25161 to use per_cu->section+offset, with Fission the section with the data is in
25162 the DWO file but we don't know that section at the point we need it.
25163 We have to use something in dwarf2_per_cu_data (or the pointer to it)
25164 because we can enter the lookup routine, get_die_type_at_offset, from
25165 outside this file, and thus won't necessarily have PER_CU->cu.
25166 Fortunately, PER_CU is stable for the life of the objfile. */
25168 struct dwarf2_per_cu_offset_and_type
25170 const struct dwarf2_per_cu_data
*per_cu
;
25171 sect_offset sect_off
;
25175 /* Hash function for a dwarf2_per_cu_offset_and_type. */
25178 per_cu_offset_and_type_hash (const void *item
)
25180 const struct dwarf2_per_cu_offset_and_type
*ofs
25181 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
25183 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
25186 /* Equality function for a dwarf2_per_cu_offset_and_type. */
25189 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
25191 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
25192 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
25193 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
25194 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
25196 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
25197 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
25200 /* Set the type associated with DIE to TYPE. Save it in CU's hash
25201 table if necessary. For convenience, return TYPE.
25203 The DIEs reading must have careful ordering to:
25204 * Not cause infite loops trying to read in DIEs as a prerequisite for
25205 reading current DIE.
25206 * Not trying to dereference contents of still incompletely read in types
25207 while reading in other DIEs.
25208 * Enable referencing still incompletely read in types just by a pointer to
25209 the type without accessing its fields.
25211 Therefore caller should follow these rules:
25212 * Try to fetch any prerequisite types we may need to build this DIE type
25213 before building the type and calling set_die_type.
25214 * After building type call set_die_type for current DIE as soon as
25215 possible before fetching more types to complete the current type.
25216 * Make the type as complete as possible before fetching more types. */
25218 static struct type
*
25219 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
25221 struct dwarf2_per_objfile
*dwarf2_per_objfile
25222 = cu
->per_cu
->dwarf2_per_objfile
;
25223 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
25224 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25225 struct attribute
*attr
;
25226 struct dynamic_prop prop
;
25228 /* For Ada types, make sure that the gnat-specific data is always
25229 initialized (if not already set). There are a few types where
25230 we should not be doing so, because the type-specific area is
25231 already used to hold some other piece of info (eg: TYPE_CODE_FLT
25232 where the type-specific area is used to store the floatformat).
25233 But this is not a problem, because the gnat-specific information
25234 is actually not needed for these types. */
25235 if (need_gnat_info (cu
)
25236 && TYPE_CODE (type
) != TYPE_CODE_FUNC
25237 && TYPE_CODE (type
) != TYPE_CODE_FLT
25238 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
25239 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
25240 && TYPE_CODE (type
) != TYPE_CODE_METHOD
25241 && !HAVE_GNAT_AUX_INFO (type
))
25242 INIT_GNAT_SPECIFIC (type
);
25244 /* Read DW_AT_allocated and set in type. */
25245 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
25246 if (attr_form_is_block (attr
))
25248 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25249 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
);
25251 else if (attr
!= NULL
)
25253 complaint (&symfile_complaints
,
25254 _("DW_AT_allocated has the wrong form (%s) at DIE %s"),
25255 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25256 sect_offset_str (die
->sect_off
));
25259 /* Read DW_AT_associated and set in type. */
25260 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
25261 if (attr_form_is_block (attr
))
25263 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25264 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
);
25266 else if (attr
!= NULL
)
25268 complaint (&symfile_complaints
,
25269 _("DW_AT_associated has the wrong form (%s) at DIE %s"),
25270 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25271 sect_offset_str (die
->sect_off
));
25274 /* Read DW_AT_data_location and set in type. */
25275 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
25276 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25277 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
);
25279 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25281 dwarf2_per_objfile
->die_type_hash
=
25282 htab_create_alloc_ex (127,
25283 per_cu_offset_and_type_hash
,
25284 per_cu_offset_and_type_eq
,
25286 &objfile
->objfile_obstack
,
25287 hashtab_obstack_allocate
,
25288 dummy_obstack_deallocate
);
25291 ofs
.per_cu
= cu
->per_cu
;
25292 ofs
.sect_off
= die
->sect_off
;
25294 slot
= (struct dwarf2_per_cu_offset_and_type
**)
25295 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
25297 complaint (&symfile_complaints
,
25298 _("A problem internal to GDB: DIE %s has type already set"),
25299 sect_offset_str (die
->sect_off
));
25300 *slot
= XOBNEW (&objfile
->objfile_obstack
,
25301 struct dwarf2_per_cu_offset_and_type
);
25306 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
25307 or return NULL if the die does not have a saved type. */
25309 static struct type
*
25310 get_die_type_at_offset (sect_offset sect_off
,
25311 struct dwarf2_per_cu_data
*per_cu
)
25313 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
25314 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
25316 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25319 ofs
.per_cu
= per_cu
;
25320 ofs
.sect_off
= sect_off
;
25321 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
25322 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
25329 /* Look up the type for DIE in CU in die_type_hash,
25330 or return NULL if DIE does not have a saved type. */
25332 static struct type
*
25333 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
25335 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
25338 /* Add a dependence relationship from CU to REF_PER_CU. */
25341 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
25342 struct dwarf2_per_cu_data
*ref_per_cu
)
25346 if (cu
->dependencies
== NULL
)
25348 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
25349 NULL
, &cu
->comp_unit_obstack
,
25350 hashtab_obstack_allocate
,
25351 dummy_obstack_deallocate
);
25353 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
25355 *slot
= ref_per_cu
;
25358 /* Subroutine of dwarf2_mark to pass to htab_traverse.
25359 Set the mark field in every compilation unit in the
25360 cache that we must keep because we are keeping CU. */
25363 dwarf2_mark_helper (void **slot
, void *data
)
25365 struct dwarf2_per_cu_data
*per_cu
;
25367 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
25369 /* cu->dependencies references may not yet have been ever read if QUIT aborts
25370 reading of the chain. As such dependencies remain valid it is not much
25371 useful to track and undo them during QUIT cleanups. */
25372 if (per_cu
->cu
== NULL
)
25375 if (per_cu
->cu
->mark
)
25377 per_cu
->cu
->mark
= 1;
25379 if (per_cu
->cu
->dependencies
!= NULL
)
25380 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25385 /* Set the mark field in CU and in every other compilation unit in the
25386 cache that we must keep because we are keeping CU. */
25389 dwarf2_mark (struct dwarf2_cu
*cu
)
25394 if (cu
->dependencies
!= NULL
)
25395 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25399 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
25403 per_cu
->cu
->mark
= 0;
25404 per_cu
= per_cu
->cu
->read_in_chain
;
25408 /* Trivial hash function for partial_die_info: the hash value of a DIE
25409 is its offset in .debug_info for this objfile. */
25412 partial_die_hash (const void *item
)
25414 const struct partial_die_info
*part_die
25415 = (const struct partial_die_info
*) item
;
25417 return to_underlying (part_die
->sect_off
);
25420 /* Trivial comparison function for partial_die_info structures: two DIEs
25421 are equal if they have the same offset. */
25424 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
25426 const struct partial_die_info
*part_die_lhs
25427 = (const struct partial_die_info
*) item_lhs
;
25428 const struct partial_die_info
*part_die_rhs
25429 = (const struct partial_die_info
*) item_rhs
;
25431 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
25434 static struct cmd_list_element
*set_dwarf_cmdlist
;
25435 static struct cmd_list_element
*show_dwarf_cmdlist
;
25438 set_dwarf_cmd (const char *args
, int from_tty
)
25440 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
25445 show_dwarf_cmd (const char *args
, int from_tty
)
25447 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
25450 int dwarf_always_disassemble
;
25453 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
25454 struct cmd_list_element
*c
, const char *value
)
25456 fprintf_filtered (file
,
25457 _("Whether to always disassemble "
25458 "DWARF expressions is %s.\n"),
25463 show_check_physname (struct ui_file
*file
, int from_tty
,
25464 struct cmd_list_element
*c
, const char *value
)
25466 fprintf_filtered (file
,
25467 _("Whether to check \"physname\" is %s.\n"),
25472 _initialize_dwarf2_read (void)
25475 dwarf2_objfile_data_key
= register_objfile_data ();
25477 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
25478 Set DWARF specific variables.\n\
25479 Configure DWARF variables such as the cache size"),
25480 &set_dwarf_cmdlist
, "maintenance set dwarf ",
25481 0/*allow-unknown*/, &maintenance_set_cmdlist
);
25483 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
25484 Show DWARF specific variables\n\
25485 Show DWARF variables such as the cache size"),
25486 &show_dwarf_cmdlist
, "maintenance show dwarf ",
25487 0/*allow-unknown*/, &maintenance_show_cmdlist
);
25489 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
25490 &dwarf_max_cache_age
, _("\
25491 Set the upper bound on the age of cached DWARF compilation units."), _("\
25492 Show the upper bound on the age of cached DWARF compilation units."), _("\
25493 A higher limit means that cached compilation units will be stored\n\
25494 in memory longer, and more total memory will be used. Zero disables\n\
25495 caching, which can slow down startup."),
25497 show_dwarf_max_cache_age
,
25498 &set_dwarf_cmdlist
,
25499 &show_dwarf_cmdlist
);
25501 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
25502 &dwarf_always_disassemble
, _("\
25503 Set whether `info address' always disassembles DWARF expressions."), _("\
25504 Show whether `info address' always disassembles DWARF expressions."), _("\
25505 When enabled, DWARF expressions are always printed in an assembly-like\n\
25506 syntax. When disabled, expressions will be printed in a more\n\
25507 conversational style, when possible."),
25509 show_dwarf_always_disassemble
,
25510 &set_dwarf_cmdlist
,
25511 &show_dwarf_cmdlist
);
25513 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
25514 Set debugging of the DWARF reader."), _("\
25515 Show debugging of the DWARF reader."), _("\
25516 When enabled (non-zero), debugging messages are printed during DWARF\n\
25517 reading and symtab expansion. A value of 1 (one) provides basic\n\
25518 information. A value greater than 1 provides more verbose information."),
25521 &setdebuglist
, &showdebuglist
);
25523 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
25524 Set debugging of the DWARF DIE reader."), _("\
25525 Show debugging of the DWARF DIE reader."), _("\
25526 When enabled (non-zero), DIEs are dumped after they are read in.\n\
25527 The value is the maximum depth to print."),
25530 &setdebuglist
, &showdebuglist
);
25532 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
25533 Set debugging of the dwarf line reader."), _("\
25534 Show debugging of the dwarf line reader."), _("\
25535 When enabled (non-zero), line number entries are dumped as they are read in.\n\
25536 A value of 1 (one) provides basic information.\n\
25537 A value greater than 1 provides more verbose information."),
25540 &setdebuglist
, &showdebuglist
);
25542 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
25543 Set cross-checking of \"physname\" code against demangler."), _("\
25544 Show cross-checking of \"physname\" code against demangler."), _("\
25545 When enabled, GDB's internal \"physname\" code is checked against\n\
25547 NULL
, show_check_physname
,
25548 &setdebuglist
, &showdebuglist
);
25550 add_setshow_boolean_cmd ("use-deprecated-index-sections",
25551 no_class
, &use_deprecated_index_sections
, _("\
25552 Set whether to use deprecated gdb_index sections."), _("\
25553 Show whether to use deprecated gdb_index sections."), _("\
25554 When enabled, deprecated .gdb_index sections are used anyway.\n\
25555 Normally they are ignored either because of a missing feature or\n\
25556 performance issue.\n\
25557 Warning: This option must be enabled before gdb reads the file."),
25560 &setlist
, &showlist
);
25562 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25563 &dwarf2_locexpr_funcs
);
25564 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25565 &dwarf2_loclist_funcs
);
25567 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25568 &dwarf2_block_frame_base_locexpr_funcs
);
25569 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25570 &dwarf2_block_frame_base_loclist_funcs
);
25573 selftests::register_test ("dw2_expand_symtabs_matching",
25574 selftests::dw2_expand_symtabs_matching::run_test
);