1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2018 Free Software Foundation, Inc.
5 Adapted by Gary Funck (gary@intrepid.com), Intrepid Technology,
6 Inc. with support from Florida State University (under contract
7 with the Ada Joint Program Office), and Silicon Graphics, Inc.
8 Initial contribution by Brent Benson, Harris Computer Systems, Inc.,
9 based on Fred Fish's (Cygnus Support) implementation of DWARF 1
12 This file is part of GDB.
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 3 of the License, or
17 (at your option) any later version.
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 /* FIXME: Various die-reading functions need to be more careful with
28 reading off the end of the section.
29 E.g., load_partial_dies, read_partial_die. */
32 #include "dwarf2read.h"
33 #include "dwarf-index-common.h"
42 #include "gdb-demangle.h"
43 #include "expression.h"
44 #include "filenames.h" /* for DOSish file names */
47 #include "complaints.h"
49 #include "dwarf2expr.h"
50 #include "dwarf2loc.h"
51 #include "cp-support.h"
57 #include "typeprint.h"
60 #include "completer.h"
65 #include "gdbcore.h" /* for gnutarget */
66 #include "gdb/gdb-index.h"
71 #include "filestuff.h"
73 #include "namespace.h"
74 #include "common/gdb_unlinker.h"
75 #include "common/function-view.h"
76 #include "common/gdb_optional.h"
77 #include "common/underlying.h"
78 #include "common/byte-vector.h"
79 #include "common/hash_enum.h"
80 #include "filename-seen-cache.h"
83 #include <sys/types.h>
85 #include <unordered_set>
86 #include <unordered_map>
90 #include <forward_list>
91 #include "rust-lang.h"
92 #include "common/pathstuff.h"
94 /* When == 1, print basic high level tracing messages.
95 When > 1, be more verbose.
96 This is in contrast to the low level DIE reading of dwarf_die_debug. */
97 static unsigned int dwarf_read_debug
= 0;
99 /* When non-zero, dump DIEs after they are read in. */
100 static unsigned int dwarf_die_debug
= 0;
102 /* When non-zero, dump line number entries as they are read in. */
103 static unsigned int dwarf_line_debug
= 0;
105 /* When non-zero, cross-check physname against demangler. */
106 static int check_physname
= 0;
108 /* When non-zero, do not reject deprecated .gdb_index sections. */
109 static int use_deprecated_index_sections
= 0;
111 static const struct objfile_data
*dwarf2_objfile_data_key
;
113 /* The "aclass" indices for various kinds of computed DWARF symbols. */
115 static int dwarf2_locexpr_index
;
116 static int dwarf2_loclist_index
;
117 static int dwarf2_locexpr_block_index
;
118 static int dwarf2_loclist_block_index
;
120 /* An index into a (C++) symbol name component in a symbol name as
121 recorded in the mapped_index's symbol table. For each C++ symbol
122 in the symbol table, we record one entry for the start of each
123 component in the symbol in a table of name components, and then
124 sort the table, in order to be able to binary search symbol names,
125 ignoring leading namespaces, both completion and regular look up.
126 For example, for symbol "A::B::C", we'll have an entry that points
127 to "A::B::C", another that points to "B::C", and another for "C".
128 Note that function symbols in GDB index have no parameter
129 information, just the function/method names. You can convert a
130 name_component to a "const char *" using the
131 'mapped_index::symbol_name_at(offset_type)' method. */
133 struct name_component
135 /* Offset in the symbol name where the component starts. Stored as
136 a (32-bit) offset instead of a pointer to save memory and improve
137 locality on 64-bit architectures. */
138 offset_type name_offset
;
140 /* The symbol's index in the symbol and constant pool tables of a
145 /* Base class containing bits shared by both .gdb_index and
146 .debug_name indexes. */
148 struct mapped_index_base
150 /* The name_component table (a sorted vector). See name_component's
151 description above. */
152 std::vector
<name_component
> name_components
;
154 /* How NAME_COMPONENTS is sorted. */
155 enum case_sensitivity name_components_casing
;
157 /* Return the number of names in the symbol table. */
158 virtual size_t symbol_name_count () const = 0;
160 /* Get the name of the symbol at IDX in the symbol table. */
161 virtual const char *symbol_name_at (offset_type idx
) const = 0;
163 /* Return whether the name at IDX in the symbol table should be
165 virtual bool symbol_name_slot_invalid (offset_type idx
) const
170 /* Build the symbol name component sorted vector, if we haven't
172 void build_name_components ();
174 /* Returns the lower (inclusive) and upper (exclusive) bounds of the
175 possible matches for LN_NO_PARAMS in the name component
177 std::pair
<std::vector
<name_component
>::const_iterator
,
178 std::vector
<name_component
>::const_iterator
>
179 find_name_components_bounds (const lookup_name_info
&ln_no_params
) const;
181 /* Prevent deleting/destroying via a base class pointer. */
183 ~mapped_index_base() = default;
186 /* A description of the mapped index. The file format is described in
187 a comment by the code that writes the index. */
188 struct mapped_index final
: public mapped_index_base
190 /* A slot/bucket in the symbol table hash. */
191 struct symbol_table_slot
193 const offset_type name
;
194 const offset_type vec
;
197 /* Index data format version. */
200 /* The total length of the buffer. */
203 /* The address table data. */
204 gdb::array_view
<const gdb_byte
> address_table
;
206 /* The symbol table, implemented as a hash table. */
207 gdb::array_view
<symbol_table_slot
> symbol_table
;
209 /* A pointer to the constant pool. */
210 const char *constant_pool
;
212 bool symbol_name_slot_invalid (offset_type idx
) const override
214 const auto &bucket
= this->symbol_table
[idx
];
215 return bucket
.name
== 0 && bucket
.vec
;
218 /* Convenience method to get at the name of the symbol at IDX in the
220 const char *symbol_name_at (offset_type idx
) const override
221 { return this->constant_pool
+ MAYBE_SWAP (this->symbol_table
[idx
].name
); }
223 size_t symbol_name_count () const override
224 { return this->symbol_table
.size (); }
227 /* A description of the mapped .debug_names.
228 Uninitialized map has CU_COUNT 0. */
229 struct mapped_debug_names final
: public mapped_index_base
231 mapped_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile_
)
232 : dwarf2_per_objfile (dwarf2_per_objfile_
)
235 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
236 bfd_endian dwarf5_byte_order
;
237 bool dwarf5_is_dwarf64
;
238 bool augmentation_is_gdb
;
240 uint32_t cu_count
= 0;
241 uint32_t tu_count
, bucket_count
, name_count
;
242 const gdb_byte
*cu_table_reordered
, *tu_table_reordered
;
243 const uint32_t *bucket_table_reordered
, *hash_table_reordered
;
244 const gdb_byte
*name_table_string_offs_reordered
;
245 const gdb_byte
*name_table_entry_offs_reordered
;
246 const gdb_byte
*entry_pool
;
253 /* Attribute name DW_IDX_*. */
256 /* Attribute form DW_FORM_*. */
259 /* Value if FORM is DW_FORM_implicit_const. */
260 LONGEST implicit_const
;
262 std::vector
<attr
> attr_vec
;
265 std::unordered_map
<ULONGEST
, index_val
> abbrev_map
;
267 const char *namei_to_name (uint32_t namei
) const;
269 /* Implementation of the mapped_index_base virtual interface, for
270 the name_components cache. */
272 const char *symbol_name_at (offset_type idx
) const override
273 { return namei_to_name (idx
); }
275 size_t symbol_name_count () const override
276 { return this->name_count
; }
279 /* See dwarf2read.h. */
282 get_dwarf2_per_objfile (struct objfile
*objfile
)
284 return ((struct dwarf2_per_objfile
*)
285 objfile_data (objfile
, dwarf2_objfile_data_key
));
288 /* Set the dwarf2_per_objfile associated to OBJFILE. */
291 set_dwarf2_per_objfile (struct objfile
*objfile
,
292 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
294 gdb_assert (get_dwarf2_per_objfile (objfile
) == NULL
);
295 set_objfile_data (objfile
, dwarf2_objfile_data_key
, dwarf2_per_objfile
);
298 /* Default names of the debugging sections. */
300 /* Note that if the debugging section has been compressed, it might
301 have a name like .zdebug_info. */
303 static const struct dwarf2_debug_sections dwarf2_elf_names
=
305 { ".debug_info", ".zdebug_info" },
306 { ".debug_abbrev", ".zdebug_abbrev" },
307 { ".debug_line", ".zdebug_line" },
308 { ".debug_loc", ".zdebug_loc" },
309 { ".debug_loclists", ".zdebug_loclists" },
310 { ".debug_macinfo", ".zdebug_macinfo" },
311 { ".debug_macro", ".zdebug_macro" },
312 { ".debug_str", ".zdebug_str" },
313 { ".debug_line_str", ".zdebug_line_str" },
314 { ".debug_ranges", ".zdebug_ranges" },
315 { ".debug_rnglists", ".zdebug_rnglists" },
316 { ".debug_types", ".zdebug_types" },
317 { ".debug_addr", ".zdebug_addr" },
318 { ".debug_frame", ".zdebug_frame" },
319 { ".eh_frame", NULL
},
320 { ".gdb_index", ".zgdb_index" },
321 { ".debug_names", ".zdebug_names" },
322 { ".debug_aranges", ".zdebug_aranges" },
326 /* List of DWO/DWP sections. */
328 static const struct dwop_section_names
330 struct dwarf2_section_names abbrev_dwo
;
331 struct dwarf2_section_names info_dwo
;
332 struct dwarf2_section_names line_dwo
;
333 struct dwarf2_section_names loc_dwo
;
334 struct dwarf2_section_names loclists_dwo
;
335 struct dwarf2_section_names macinfo_dwo
;
336 struct dwarf2_section_names macro_dwo
;
337 struct dwarf2_section_names str_dwo
;
338 struct dwarf2_section_names str_offsets_dwo
;
339 struct dwarf2_section_names types_dwo
;
340 struct dwarf2_section_names cu_index
;
341 struct dwarf2_section_names tu_index
;
345 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
346 { ".debug_info.dwo", ".zdebug_info.dwo" },
347 { ".debug_line.dwo", ".zdebug_line.dwo" },
348 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
349 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
350 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
351 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
352 { ".debug_str.dwo", ".zdebug_str.dwo" },
353 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
354 { ".debug_types.dwo", ".zdebug_types.dwo" },
355 { ".debug_cu_index", ".zdebug_cu_index" },
356 { ".debug_tu_index", ".zdebug_tu_index" },
359 /* local data types */
361 /* The data in a compilation unit header, after target2host
362 translation, looks like this. */
363 struct comp_unit_head
367 unsigned char addr_size
;
368 unsigned char signed_addr_p
;
369 sect_offset abbrev_sect_off
;
371 /* Size of file offsets; either 4 or 8. */
372 unsigned int offset_size
;
374 /* Size of the length field; either 4 or 12. */
375 unsigned int initial_length_size
;
377 enum dwarf_unit_type unit_type
;
379 /* Offset to the first byte of this compilation unit header in the
380 .debug_info section, for resolving relative reference dies. */
381 sect_offset sect_off
;
383 /* Offset to first die in this cu from the start of the cu.
384 This will be the first byte following the compilation unit header. */
385 cu_offset first_die_cu_offset
;
387 /* 64-bit signature of this type unit - it is valid only for
388 UNIT_TYPE DW_UT_type. */
391 /* For types, offset in the type's DIE of the type defined by this TU. */
392 cu_offset type_cu_offset_in_tu
;
395 /* Type used for delaying computation of method physnames.
396 See comments for compute_delayed_physnames. */
397 struct delayed_method_info
399 /* The type to which the method is attached, i.e., its parent class. */
402 /* The index of the method in the type's function fieldlists. */
405 /* The index of the method in the fieldlist. */
408 /* The name of the DIE. */
411 /* The DIE associated with this method. */
412 struct die_info
*die
;
415 /* Internal state when decoding a particular compilation unit. */
418 explicit dwarf2_cu (struct dwarf2_per_cu_data
*per_cu
);
421 DISABLE_COPY_AND_ASSIGN (dwarf2_cu
);
423 /* The header of the compilation unit. */
424 struct comp_unit_head header
{};
426 /* Base address of this compilation unit. */
427 CORE_ADDR base_address
= 0;
429 /* Non-zero if base_address has been set. */
432 /* The language we are debugging. */
433 enum language language
= language_unknown
;
434 const struct language_defn
*language_defn
= nullptr;
436 const char *producer
= nullptr;
438 /* The generic symbol table building routines have separate lists for
439 file scope symbols and all all other scopes (local scopes). So
440 we need to select the right one to pass to add_symbol_to_list().
441 We do it by keeping a pointer to the correct list in list_in_scope.
443 FIXME: The original dwarf code just treated the file scope as the
444 first local scope, and all other local scopes as nested local
445 scopes, and worked fine. Check to see if we really need to
446 distinguish these in buildsym.c. */
447 struct pending
**list_in_scope
= nullptr;
449 /* Hash table holding all the loaded partial DIEs
450 with partial_die->offset.SECT_OFF as hash. */
451 htab_t partial_dies
= nullptr;
453 /* Storage for things with the same lifetime as this read-in compilation
454 unit, including partial DIEs. */
455 auto_obstack comp_unit_obstack
;
457 /* When multiple dwarf2_cu structures are living in memory, this field
458 chains them all together, so that they can be released efficiently.
459 We will probably also want a generation counter so that most-recently-used
460 compilation units are cached... */
461 struct dwarf2_per_cu_data
*read_in_chain
= nullptr;
463 /* Backlink to our per_cu entry. */
464 struct dwarf2_per_cu_data
*per_cu
;
466 /* How many compilation units ago was this CU last referenced? */
469 /* A hash table of DIE cu_offset for following references with
470 die_info->offset.sect_off as hash. */
471 htab_t die_hash
= nullptr;
473 /* Full DIEs if read in. */
474 struct die_info
*dies
= nullptr;
476 /* A set of pointers to dwarf2_per_cu_data objects for compilation
477 units referenced by this one. Only set during full symbol processing;
478 partial symbol tables do not have dependencies. */
479 htab_t dependencies
= nullptr;
481 /* Header data from the line table, during full symbol processing. */
482 struct line_header
*line_header
= nullptr;
483 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
484 it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL,
485 this is the DW_TAG_compile_unit die for this CU. We'll hold on
486 to the line header as long as this DIE is being processed. See
487 process_die_scope. */
488 die_info
*line_header_die_owner
= nullptr;
490 /* A list of methods which need to have physnames computed
491 after all type information has been read. */
492 std::vector
<delayed_method_info
> method_list
;
494 /* To be copied to symtab->call_site_htab. */
495 htab_t call_site_htab
= nullptr;
497 /* Non-NULL if this CU came from a DWO file.
498 There is an invariant here that is important to remember:
499 Except for attributes copied from the top level DIE in the "main"
500 (or "stub") file in preparation for reading the DWO file
501 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
502 Either there isn't a DWO file (in which case this is NULL and the point
503 is moot), or there is and either we're not going to read it (in which
504 case this is NULL) or there is and we are reading it (in which case this
506 struct dwo_unit
*dwo_unit
= nullptr;
508 /* The DW_AT_addr_base attribute if present, zero otherwise
509 (zero is a valid value though).
510 Note this value comes from the Fission stub CU/TU's DIE. */
511 ULONGEST addr_base
= 0;
513 /* The DW_AT_ranges_base attribute if present, zero otherwise
514 (zero is a valid value though).
515 Note this value comes from the Fission stub CU/TU's DIE.
516 Also note that the value is zero in the non-DWO case so this value can
517 be used without needing to know whether DWO files are in use or not.
518 N.B. This does not apply to DW_AT_ranges appearing in
519 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
520 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
521 DW_AT_ranges_base *would* have to be applied, and we'd have to care
522 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
523 ULONGEST ranges_base
= 0;
525 /* When reading debug info generated by older versions of rustc, we
526 have to rewrite some union types to be struct types with a
527 variant part. This rewriting must be done after the CU is fully
528 read in, because otherwise at the point of rewriting some struct
529 type might not have been fully processed. So, we keep a list of
530 all such types here and process them after expansion. */
531 std::vector
<struct type
*> rust_unions
;
533 /* Mark used when releasing cached dies. */
534 unsigned int mark
: 1;
536 /* This CU references .debug_loc. See the symtab->locations_valid field.
537 This test is imperfect as there may exist optimized debug code not using
538 any location list and still facing inlining issues if handled as
539 unoptimized code. For a future better test see GCC PR other/32998. */
540 unsigned int has_loclist
: 1;
542 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is set
543 if all the producer_is_* fields are valid. This information is cached
544 because profiling CU expansion showed excessive time spent in
545 producer_is_gxx_lt_4_6. */
546 unsigned int checked_producer
: 1;
547 unsigned int producer_is_gxx_lt_4_6
: 1;
548 unsigned int producer_is_gcc_lt_4_3
: 1;
549 unsigned int producer_is_icc_lt_14
: 1;
551 /* When set, the file that we're processing is known to have
552 debugging info for C++ namespaces. GCC 3.3.x did not produce
553 this information, but later versions do. */
555 unsigned int processing_has_namespace_info
: 1;
557 struct partial_die_info
*find_partial_die (sect_offset sect_off
);
560 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
561 This includes type_unit_group and quick_file_names. */
563 struct stmt_list_hash
565 /* The DWO unit this table is from or NULL if there is none. */
566 struct dwo_unit
*dwo_unit
;
568 /* Offset in .debug_line or .debug_line.dwo. */
569 sect_offset line_sect_off
;
572 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
573 an object of this type. */
575 struct type_unit_group
577 /* dwarf2read.c's main "handle" on a TU symtab.
578 To simplify things we create an artificial CU that "includes" all the
579 type units using this stmt_list so that the rest of the code still has
580 a "per_cu" handle on the symtab.
581 This PER_CU is recognized by having no section. */
582 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
583 struct dwarf2_per_cu_data per_cu
;
585 /* The TUs that share this DW_AT_stmt_list entry.
586 This is added to while parsing type units to build partial symtabs,
587 and is deleted afterwards and not used again. */
588 VEC (sig_type_ptr
) *tus
;
590 /* The compunit symtab.
591 Type units in a group needn't all be defined in the same source file,
592 so we create an essentially anonymous symtab as the compunit symtab. */
593 struct compunit_symtab
*compunit_symtab
;
595 /* The data used to construct the hash key. */
596 struct stmt_list_hash hash
;
598 /* The number of symtabs from the line header.
599 The value here must match line_header.num_file_names. */
600 unsigned int num_symtabs
;
602 /* The symbol tables for this TU (obtained from the files listed in
604 WARNING: The order of entries here must match the order of entries
605 in the line header. After the first TU using this type_unit_group, the
606 line header for the subsequent TUs is recreated from this. This is done
607 because we need to use the same symtabs for each TU using the same
608 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
609 there's no guarantee the line header doesn't have duplicate entries. */
610 struct symtab
**symtabs
;
613 /* These sections are what may appear in a (real or virtual) DWO file. */
617 struct dwarf2_section_info abbrev
;
618 struct dwarf2_section_info line
;
619 struct dwarf2_section_info loc
;
620 struct dwarf2_section_info loclists
;
621 struct dwarf2_section_info macinfo
;
622 struct dwarf2_section_info macro
;
623 struct dwarf2_section_info str
;
624 struct dwarf2_section_info str_offsets
;
625 /* In the case of a virtual DWO file, these two are unused. */
626 struct dwarf2_section_info info
;
627 VEC (dwarf2_section_info_def
) *types
;
630 /* CUs/TUs in DWP/DWO files. */
634 /* Backlink to the containing struct dwo_file. */
635 struct dwo_file
*dwo_file
;
637 /* The "id" that distinguishes this CU/TU.
638 .debug_info calls this "dwo_id", .debug_types calls this "signature".
639 Since signatures came first, we stick with it for consistency. */
642 /* The section this CU/TU lives in, in the DWO file. */
643 struct dwarf2_section_info
*section
;
645 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
646 sect_offset sect_off
;
649 /* For types, offset in the type's DIE of the type defined by this TU. */
650 cu_offset type_offset_in_tu
;
653 /* include/dwarf2.h defines the DWP section codes.
654 It defines a max value but it doesn't define a min value, which we
655 use for error checking, so provide one. */
657 enum dwp_v2_section_ids
662 /* Data for one DWO file.
664 This includes virtual DWO files (a virtual DWO file is a DWO file as it
665 appears in a DWP file). DWP files don't really have DWO files per se -
666 comdat folding of types "loses" the DWO file they came from, and from
667 a high level view DWP files appear to contain a mass of random types.
668 However, to maintain consistency with the non-DWP case we pretend DWP
669 files contain virtual DWO files, and we assign each TU with one virtual
670 DWO file (generally based on the line and abbrev section offsets -
671 a heuristic that seems to work in practice). */
675 /* The DW_AT_GNU_dwo_name attribute.
676 For virtual DWO files the name is constructed from the section offsets
677 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
678 from related CU+TUs. */
679 const char *dwo_name
;
681 /* The DW_AT_comp_dir attribute. */
682 const char *comp_dir
;
684 /* The bfd, when the file is open. Otherwise this is NULL.
685 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
688 /* The sections that make up this DWO file.
689 Remember that for virtual DWO files in DWP V2, these are virtual
690 sections (for lack of a better name). */
691 struct dwo_sections sections
;
693 /* The CUs in the file.
694 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
695 an extension to handle LLVM's Link Time Optimization output (where
696 multiple source files may be compiled into a single object/dwo pair). */
699 /* Table of TUs in the file.
700 Each element is a struct dwo_unit. */
704 /* These sections are what may appear in a DWP file. */
708 /* These are used by both DWP version 1 and 2. */
709 struct dwarf2_section_info str
;
710 struct dwarf2_section_info cu_index
;
711 struct dwarf2_section_info tu_index
;
713 /* These are only used by DWP version 2 files.
714 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
715 sections are referenced by section number, and are not recorded here.
716 In DWP version 2 there is at most one copy of all these sections, each
717 section being (effectively) comprised of the concatenation of all of the
718 individual sections that exist in the version 1 format.
719 To keep the code simple we treat each of these concatenated pieces as a
720 section itself (a virtual section?). */
721 struct dwarf2_section_info abbrev
;
722 struct dwarf2_section_info info
;
723 struct dwarf2_section_info line
;
724 struct dwarf2_section_info loc
;
725 struct dwarf2_section_info macinfo
;
726 struct dwarf2_section_info macro
;
727 struct dwarf2_section_info str_offsets
;
728 struct dwarf2_section_info types
;
731 /* These sections are what may appear in a virtual DWO file in DWP version 1.
732 A virtual DWO file is a DWO file as it appears in a DWP file. */
734 struct virtual_v1_dwo_sections
736 struct dwarf2_section_info abbrev
;
737 struct dwarf2_section_info line
;
738 struct dwarf2_section_info loc
;
739 struct dwarf2_section_info macinfo
;
740 struct dwarf2_section_info macro
;
741 struct dwarf2_section_info str_offsets
;
742 /* Each DWP hash table entry records one CU or one TU.
743 That is recorded here, and copied to dwo_unit.section. */
744 struct dwarf2_section_info info_or_types
;
747 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
748 In version 2, the sections of the DWO files are concatenated together
749 and stored in one section of that name. Thus each ELF section contains
750 several "virtual" sections. */
752 struct virtual_v2_dwo_sections
754 bfd_size_type abbrev_offset
;
755 bfd_size_type abbrev_size
;
757 bfd_size_type line_offset
;
758 bfd_size_type line_size
;
760 bfd_size_type loc_offset
;
761 bfd_size_type loc_size
;
763 bfd_size_type macinfo_offset
;
764 bfd_size_type macinfo_size
;
766 bfd_size_type macro_offset
;
767 bfd_size_type macro_size
;
769 bfd_size_type str_offsets_offset
;
770 bfd_size_type str_offsets_size
;
772 /* Each DWP hash table entry records one CU or one TU.
773 That is recorded here, and copied to dwo_unit.section. */
774 bfd_size_type info_or_types_offset
;
775 bfd_size_type info_or_types_size
;
778 /* Contents of DWP hash tables. */
780 struct dwp_hash_table
782 uint32_t version
, nr_columns
;
783 uint32_t nr_units
, nr_slots
;
784 const gdb_byte
*hash_table
, *unit_table
;
789 const gdb_byte
*indices
;
793 /* This is indexed by column number and gives the id of the section
795 #define MAX_NR_V2_DWO_SECTIONS \
796 (1 /* .debug_info or .debug_types */ \
797 + 1 /* .debug_abbrev */ \
798 + 1 /* .debug_line */ \
799 + 1 /* .debug_loc */ \
800 + 1 /* .debug_str_offsets */ \
801 + 1 /* .debug_macro or .debug_macinfo */)
802 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
803 const gdb_byte
*offsets
;
804 const gdb_byte
*sizes
;
809 /* Data for one DWP file. */
813 /* Name of the file. */
816 /* File format version. */
822 /* Section info for this file. */
823 struct dwp_sections sections
;
825 /* Table of CUs in the file. */
826 const struct dwp_hash_table
*cus
;
828 /* Table of TUs in the file. */
829 const struct dwp_hash_table
*tus
;
831 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
835 /* Table to map ELF section numbers to their sections.
836 This is only needed for the DWP V1 file format. */
837 unsigned int num_sections
;
838 asection
**elf_sections
;
841 /* This represents a '.dwz' file. */
845 /* A dwz file can only contain a few sections. */
846 struct dwarf2_section_info abbrev
;
847 struct dwarf2_section_info info
;
848 struct dwarf2_section_info str
;
849 struct dwarf2_section_info line
;
850 struct dwarf2_section_info macro
;
851 struct dwarf2_section_info gdb_index
;
852 struct dwarf2_section_info debug_names
;
858 /* Struct used to pass misc. parameters to read_die_and_children, et
859 al. which are used for both .debug_info and .debug_types dies.
860 All parameters here are unchanging for the life of the call. This
861 struct exists to abstract away the constant parameters of die reading. */
863 struct die_reader_specs
865 /* The bfd of die_section. */
868 /* The CU of the DIE we are parsing. */
869 struct dwarf2_cu
*cu
;
871 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
872 struct dwo_file
*dwo_file
;
874 /* The section the die comes from.
875 This is either .debug_info or .debug_types, or the .dwo variants. */
876 struct dwarf2_section_info
*die_section
;
878 /* die_section->buffer. */
879 const gdb_byte
*buffer
;
881 /* The end of the buffer. */
882 const gdb_byte
*buffer_end
;
884 /* The value of the DW_AT_comp_dir attribute. */
885 const char *comp_dir
;
887 /* The abbreviation table to use when reading the DIEs. */
888 struct abbrev_table
*abbrev_table
;
891 /* Type of function passed to init_cutu_and_read_dies, et.al. */
892 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
893 const gdb_byte
*info_ptr
,
894 struct die_info
*comp_unit_die
,
898 /* A 1-based directory index. This is a strong typedef to prevent
899 accidentally using a directory index as a 0-based index into an
901 enum class dir_index
: unsigned int {};
903 /* Likewise, a 1-based file name index. */
904 enum class file_name_index
: unsigned int {};
908 file_entry () = default;
910 file_entry (const char *name_
, dir_index d_index_
,
911 unsigned int mod_time_
, unsigned int length_
)
914 mod_time (mod_time_
),
918 /* Return the include directory at D_INDEX stored in LH. Returns
919 NULL if D_INDEX is out of bounds. */
920 const char *include_dir (const line_header
*lh
) const;
922 /* The file name. Note this is an observing pointer. The memory is
923 owned by debug_line_buffer. */
926 /* The directory index (1-based). */
927 dir_index d_index
{};
929 unsigned int mod_time
{};
931 unsigned int length
{};
933 /* True if referenced by the Line Number Program. */
936 /* The associated symbol table, if any. */
937 struct symtab
*symtab
{};
940 /* The line number information for a compilation unit (found in the
941 .debug_line section) begins with a "statement program header",
942 which contains the following information. */
949 /* Add an entry to the include directory table. */
950 void add_include_dir (const char *include_dir
);
952 /* Add an entry to the file name table. */
953 void add_file_name (const char *name
, dir_index d_index
,
954 unsigned int mod_time
, unsigned int length
);
956 /* Return the include dir at INDEX (1-based). Returns NULL if INDEX
958 const char *include_dir_at (dir_index index
) const
960 /* Convert directory index number (1-based) to vector index
962 size_t vec_index
= to_underlying (index
) - 1;
964 if (vec_index
>= include_dirs
.size ())
966 return include_dirs
[vec_index
];
969 /* Return the file name at INDEX (1-based). Returns NULL if INDEX
971 file_entry
*file_name_at (file_name_index index
)
973 /* Convert file name index number (1-based) to vector index
975 size_t vec_index
= to_underlying (index
) - 1;
977 if (vec_index
>= file_names
.size ())
979 return &file_names
[vec_index
];
982 /* Const version of the above. */
983 const file_entry
*file_name_at (unsigned int index
) const
985 if (index
>= file_names
.size ())
987 return &file_names
[index
];
990 /* Offset of line number information in .debug_line section. */
991 sect_offset sect_off
{};
993 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
994 unsigned offset_in_dwz
: 1; /* Can't initialize bitfields in-class. */
996 unsigned int total_length
{};
997 unsigned short version
{};
998 unsigned int header_length
{};
999 unsigned char minimum_instruction_length
{};
1000 unsigned char maximum_ops_per_instruction
{};
1001 unsigned char default_is_stmt
{};
1003 unsigned char line_range
{};
1004 unsigned char opcode_base
{};
1006 /* standard_opcode_lengths[i] is the number of operands for the
1007 standard opcode whose value is i. This means that
1008 standard_opcode_lengths[0] is unused, and the last meaningful
1009 element is standard_opcode_lengths[opcode_base - 1]. */
1010 std::unique_ptr
<unsigned char[]> standard_opcode_lengths
;
1012 /* The include_directories table. Note these are observing
1013 pointers. The memory is owned by debug_line_buffer. */
1014 std::vector
<const char *> include_dirs
;
1016 /* The file_names table. */
1017 std::vector
<file_entry
> file_names
;
1019 /* The start and end of the statement program following this
1020 header. These point into dwarf2_per_objfile->line_buffer. */
1021 const gdb_byte
*statement_program_start
{}, *statement_program_end
{};
1024 typedef std::unique_ptr
<line_header
> line_header_up
;
1027 file_entry::include_dir (const line_header
*lh
) const
1029 return lh
->include_dir_at (d_index
);
1032 /* When we construct a partial symbol table entry we only
1033 need this much information. */
1034 struct partial_die_info
: public allocate_on_obstack
1036 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
1038 /* Disable assign but still keep copy ctor, which is needed
1039 load_partial_dies. */
1040 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
1042 /* Adjust the partial die before generating a symbol for it. This
1043 function may set the is_external flag or change the DIE's
1045 void fixup (struct dwarf2_cu
*cu
);
1047 /* Read a minimal amount of information into the minimal die
1049 const gdb_byte
*read (const struct die_reader_specs
*reader
,
1050 const struct abbrev_info
&abbrev
,
1051 const gdb_byte
*info_ptr
);
1053 /* Offset of this DIE. */
1054 const sect_offset sect_off
;
1056 /* DWARF-2 tag for this DIE. */
1057 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1059 /* Assorted flags describing the data found in this DIE. */
1060 const unsigned int has_children
: 1;
1062 unsigned int is_external
: 1;
1063 unsigned int is_declaration
: 1;
1064 unsigned int has_type
: 1;
1065 unsigned int has_specification
: 1;
1066 unsigned int has_pc_info
: 1;
1067 unsigned int may_be_inlined
: 1;
1069 /* This DIE has been marked DW_AT_main_subprogram. */
1070 unsigned int main_subprogram
: 1;
1072 /* Flag set if the SCOPE field of this structure has been
1074 unsigned int scope_set
: 1;
1076 /* Flag set if the DIE has a byte_size attribute. */
1077 unsigned int has_byte_size
: 1;
1079 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1080 unsigned int has_const_value
: 1;
1082 /* Flag set if any of the DIE's children are template arguments. */
1083 unsigned int has_template_arguments
: 1;
1085 /* Flag set if fixup has been called on this die. */
1086 unsigned int fixup_called
: 1;
1088 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1089 unsigned int is_dwz
: 1;
1091 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1092 unsigned int spec_is_dwz
: 1;
1094 /* The name of this DIE. Normally the value of DW_AT_name, but
1095 sometimes a default name for unnamed DIEs. */
1096 const char *name
= nullptr;
1098 /* The linkage name, if present. */
1099 const char *linkage_name
= nullptr;
1101 /* The scope to prepend to our children. This is generally
1102 allocated on the comp_unit_obstack, so will disappear
1103 when this compilation unit leaves the cache. */
1104 const char *scope
= nullptr;
1106 /* Some data associated with the partial DIE. The tag determines
1107 which field is live. */
1110 /* The location description associated with this DIE, if any. */
1111 struct dwarf_block
*locdesc
;
1112 /* The offset of an import, for DW_TAG_imported_unit. */
1113 sect_offset sect_off
;
1116 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1117 CORE_ADDR lowpc
= 0;
1118 CORE_ADDR highpc
= 0;
1120 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1121 DW_AT_sibling, if any. */
1122 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1123 could return DW_AT_sibling values to its caller load_partial_dies. */
1124 const gdb_byte
*sibling
= nullptr;
1126 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1127 DW_AT_specification (or DW_AT_abstract_origin or
1128 DW_AT_extension). */
1129 sect_offset spec_offset
{};
1131 /* Pointers to this DIE's parent, first child, and next sibling,
1133 struct partial_die_info
*die_parent
= nullptr;
1134 struct partial_die_info
*die_child
= nullptr;
1135 struct partial_die_info
*die_sibling
= nullptr;
1137 friend struct partial_die_info
*
1138 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1141 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1142 partial_die_info (sect_offset sect_off
)
1143 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1147 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1149 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1154 has_specification
= 0;
1157 main_subprogram
= 0;
1160 has_const_value
= 0;
1161 has_template_arguments
= 0;
1168 /* This data structure holds the information of an abbrev. */
1171 unsigned int number
; /* number identifying abbrev */
1172 enum dwarf_tag tag
; /* dwarf tag */
1173 unsigned short has_children
; /* boolean */
1174 unsigned short num_attrs
; /* number of attributes */
1175 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1176 struct abbrev_info
*next
; /* next in chain */
1181 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1182 ENUM_BITFIELD(dwarf_form
) form
: 16;
1184 /* It is valid only if FORM is DW_FORM_implicit_const. */
1185 LONGEST implicit_const
;
1188 /* Size of abbrev_table.abbrev_hash_table. */
1189 #define ABBREV_HASH_SIZE 121
1191 /* Top level data structure to contain an abbreviation table. */
1195 explicit abbrev_table (sect_offset off
)
1199 XOBNEWVEC (&abbrev_obstack
, struct abbrev_info
*, ABBREV_HASH_SIZE
);
1200 memset (m_abbrevs
, 0, ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
1203 DISABLE_COPY_AND_ASSIGN (abbrev_table
);
1205 /* Allocate space for a struct abbrev_info object in
1207 struct abbrev_info
*alloc_abbrev ();
1209 /* Add an abbreviation to the table. */
1210 void add_abbrev (unsigned int abbrev_number
, struct abbrev_info
*abbrev
);
1212 /* Look up an abbrev in the table.
1213 Returns NULL if the abbrev is not found. */
1215 struct abbrev_info
*lookup_abbrev (unsigned int abbrev_number
);
1218 /* Where the abbrev table came from.
1219 This is used as a sanity check when the table is used. */
1220 const sect_offset sect_off
;
1222 /* Storage for the abbrev table. */
1223 auto_obstack abbrev_obstack
;
1227 /* Hash table of abbrevs.
1228 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1229 It could be statically allocated, but the previous code didn't so we
1231 struct abbrev_info
**m_abbrevs
;
1234 typedef std::unique_ptr
<struct abbrev_table
> abbrev_table_up
;
1236 /* Attributes have a name and a value. */
1239 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1240 ENUM_BITFIELD(dwarf_form
) form
: 15;
1242 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1243 field should be in u.str (existing only for DW_STRING) but it is kept
1244 here for better struct attribute alignment. */
1245 unsigned int string_is_canonical
: 1;
1250 struct dwarf_block
*blk
;
1259 /* This data structure holds a complete die structure. */
1262 /* DWARF-2 tag for this DIE. */
1263 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1265 /* Number of attributes */
1266 unsigned char num_attrs
;
1268 /* True if we're presently building the full type name for the
1269 type derived from this DIE. */
1270 unsigned char building_fullname
: 1;
1272 /* True if this die is in process. PR 16581. */
1273 unsigned char in_process
: 1;
1276 unsigned int abbrev
;
1278 /* Offset in .debug_info or .debug_types section. */
1279 sect_offset sect_off
;
1281 /* The dies in a compilation unit form an n-ary tree. PARENT
1282 points to this die's parent; CHILD points to the first child of
1283 this node; and all the children of a given node are chained
1284 together via their SIBLING fields. */
1285 struct die_info
*child
; /* Its first child, if any. */
1286 struct die_info
*sibling
; /* Its next sibling, if any. */
1287 struct die_info
*parent
; /* Its parent, if any. */
1289 /* An array of attributes, with NUM_ATTRS elements. There may be
1290 zero, but it's not common and zero-sized arrays are not
1291 sufficiently portable C. */
1292 struct attribute attrs
[1];
1295 /* Get at parts of an attribute structure. */
1297 #define DW_STRING(attr) ((attr)->u.str)
1298 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1299 #define DW_UNSND(attr) ((attr)->u.unsnd)
1300 #define DW_BLOCK(attr) ((attr)->u.blk)
1301 #define DW_SND(attr) ((attr)->u.snd)
1302 #define DW_ADDR(attr) ((attr)->u.addr)
1303 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1305 /* Blocks are a bunch of untyped bytes. */
1310 /* Valid only if SIZE is not zero. */
1311 const gdb_byte
*data
;
1314 #ifndef ATTR_ALLOC_CHUNK
1315 #define ATTR_ALLOC_CHUNK 4
1318 /* Allocate fields for structs, unions and enums in this size. */
1319 #ifndef DW_FIELD_ALLOC_CHUNK
1320 #define DW_FIELD_ALLOC_CHUNK 4
1323 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1324 but this would require a corresponding change in unpack_field_as_long
1326 static int bits_per_byte
= 8;
1328 /* When reading a variant or variant part, we track a bit more
1329 information about the field, and store it in an object of this
1332 struct variant_field
1334 /* If we see a DW_TAG_variant, then this will be the discriminant
1336 ULONGEST discriminant_value
;
1337 /* If we see a DW_TAG_variant, then this will be set if this is the
1339 bool default_branch
;
1340 /* While reading a DW_TAG_variant_part, this will be set if this
1341 field is the discriminant. */
1342 bool is_discriminant
;
1347 int accessibility
= 0;
1349 /* Extra information to describe a variant or variant part. */
1350 struct variant_field variant
{};
1351 struct field field
{};
1356 const char *name
= nullptr;
1357 std::vector
<struct fn_field
> fnfields
;
1360 /* The routines that read and process dies for a C struct or C++ class
1361 pass lists of data member fields and lists of member function fields
1362 in an instance of a field_info structure, as defined below. */
1365 /* List of data member and baseclasses fields. */
1366 std::vector
<struct nextfield
> fields
;
1367 std::vector
<struct nextfield
> baseclasses
;
1369 /* Number of fields (including baseclasses). */
1372 /* Set if the accesibility of one of the fields is not public. */
1373 int non_public_fields
= 0;
1375 /* Member function fieldlist array, contains name of possibly overloaded
1376 member function, number of overloaded member functions and a pointer
1377 to the head of the member function field chain. */
1378 std::vector
<struct fnfieldlist
> fnfieldlists
;
1380 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1381 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1382 std::vector
<struct decl_field
> typedef_field_list
;
1384 /* Nested types defined by this class and the number of elements in this
1386 std::vector
<struct decl_field
> nested_types_list
;
1389 /* One item on the queue of compilation units to read in full symbols
1391 struct dwarf2_queue_item
1393 struct dwarf2_per_cu_data
*per_cu
;
1394 enum language pretend_language
;
1395 struct dwarf2_queue_item
*next
;
1398 /* The current queue. */
1399 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1401 /* Loaded secondary compilation units are kept in memory until they
1402 have not been referenced for the processing of this many
1403 compilation units. Set this to zero to disable caching. Cache
1404 sizes of up to at least twenty will improve startup time for
1405 typical inter-CU-reference binaries, at an obvious memory cost. */
1406 static int dwarf_max_cache_age
= 5;
1408 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1409 struct cmd_list_element
*c
, const char *value
)
1411 fprintf_filtered (file
, _("The upper bound on the age of cached "
1412 "DWARF compilation units is %s.\n"),
1416 /* local function prototypes */
1418 static const char *get_section_name (const struct dwarf2_section_info
*);
1420 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1422 static void dwarf2_find_base_address (struct die_info
*die
,
1423 struct dwarf2_cu
*cu
);
1425 static struct partial_symtab
*create_partial_symtab
1426 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1428 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1429 const gdb_byte
*info_ptr
,
1430 struct die_info
*type_unit_die
,
1431 int has_children
, void *data
);
1433 static void dwarf2_build_psymtabs_hard
1434 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1436 static void scan_partial_symbols (struct partial_die_info
*,
1437 CORE_ADDR
*, CORE_ADDR
*,
1438 int, struct dwarf2_cu
*);
1440 static void add_partial_symbol (struct partial_die_info
*,
1441 struct dwarf2_cu
*);
1443 static void add_partial_namespace (struct partial_die_info
*pdi
,
1444 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1445 int set_addrmap
, struct dwarf2_cu
*cu
);
1447 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1448 CORE_ADDR
*highpc
, int set_addrmap
,
1449 struct dwarf2_cu
*cu
);
1451 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1452 struct dwarf2_cu
*cu
);
1454 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1455 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1456 int need_pc
, struct dwarf2_cu
*cu
);
1458 static void dwarf2_read_symtab (struct partial_symtab
*,
1461 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1463 static abbrev_table_up abbrev_table_read_table
1464 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, struct dwarf2_section_info
*,
1467 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1469 static struct partial_die_info
*load_partial_dies
1470 (const struct die_reader_specs
*, const gdb_byte
*, int);
1472 static struct partial_die_info
*find_partial_die (sect_offset
, int,
1473 struct dwarf2_cu
*);
1475 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1476 struct attribute
*, struct attr_abbrev
*,
1479 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1481 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1483 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1485 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1487 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1489 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1492 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1494 static LONGEST read_checked_initial_length_and_offset
1495 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1496 unsigned int *, unsigned int *);
1498 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1499 const struct comp_unit_head
*,
1502 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1504 static sect_offset read_abbrev_offset
1505 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1506 struct dwarf2_section_info
*, sect_offset
);
1508 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1510 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1512 static const char *read_indirect_string
1513 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1514 const struct comp_unit_head
*, unsigned int *);
1516 static const char *read_indirect_line_string
1517 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1518 const struct comp_unit_head
*, unsigned int *);
1520 static const char *read_indirect_string_at_offset
1521 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
1522 LONGEST str_offset
);
1524 static const char *read_indirect_string_from_dwz
1525 (struct objfile
*objfile
, struct dwz_file
*, LONGEST
);
1527 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1529 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1533 static const char *read_str_index (const struct die_reader_specs
*reader
,
1534 ULONGEST str_index
);
1536 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1538 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1539 struct dwarf2_cu
*);
1541 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1544 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1545 struct dwarf2_cu
*cu
);
1547 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1548 struct dwarf2_cu
*cu
);
1550 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1552 static struct die_info
*die_specification (struct die_info
*die
,
1553 struct dwarf2_cu
**);
1555 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1556 struct dwarf2_cu
*cu
);
1558 static void dwarf_decode_lines (struct line_header
*, const char *,
1559 struct dwarf2_cu
*, struct partial_symtab
*,
1560 CORE_ADDR
, int decode_mapping
);
1562 static void dwarf2_start_subfile (const char *, const char *);
1564 static struct compunit_symtab
*dwarf2_start_symtab (struct dwarf2_cu
*,
1565 const char *, const char *,
1568 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1569 struct dwarf2_cu
*, struct symbol
* = NULL
);
1571 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1572 struct dwarf2_cu
*);
1574 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1577 struct obstack
*obstack
,
1578 struct dwarf2_cu
*cu
, LONGEST
*value
,
1579 const gdb_byte
**bytes
,
1580 struct dwarf2_locexpr_baton
**baton
);
1582 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1584 static int need_gnat_info (struct dwarf2_cu
*);
1586 static struct type
*die_descriptive_type (struct die_info
*,
1587 struct dwarf2_cu
*);
1589 static void set_descriptive_type (struct type
*, struct die_info
*,
1590 struct dwarf2_cu
*);
1592 static struct type
*die_containing_type (struct die_info
*,
1593 struct dwarf2_cu
*);
1595 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1596 struct dwarf2_cu
*);
1598 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1600 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1602 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1604 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1605 const char *suffix
, int physname
,
1606 struct dwarf2_cu
*cu
);
1608 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1610 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1612 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1614 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1616 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1618 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1620 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1621 struct dwarf2_cu
*, struct partial_symtab
*);
1623 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1624 values. Keep the items ordered with increasing constraints compliance. */
1627 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1628 PC_BOUNDS_NOT_PRESENT
,
1630 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1631 were present but they do not form a valid range of PC addresses. */
1634 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1637 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1641 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1642 CORE_ADDR
*, CORE_ADDR
*,
1644 struct partial_symtab
*);
1646 static void get_scope_pc_bounds (struct die_info
*,
1647 CORE_ADDR
*, CORE_ADDR
*,
1648 struct dwarf2_cu
*);
1650 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1651 CORE_ADDR
, struct dwarf2_cu
*);
1653 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1654 struct dwarf2_cu
*);
1656 static void dwarf2_attach_fields_to_type (struct field_info
*,
1657 struct type
*, struct dwarf2_cu
*);
1659 static void dwarf2_add_member_fn (struct field_info
*,
1660 struct die_info
*, struct type
*,
1661 struct dwarf2_cu
*);
1663 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1665 struct dwarf2_cu
*);
1667 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1669 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1671 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1673 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1675 static struct using_direct
**using_directives (enum language
);
1677 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1679 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1681 static struct type
*read_module_type (struct die_info
*die
,
1682 struct dwarf2_cu
*cu
);
1684 static const char *namespace_name (struct die_info
*die
,
1685 int *is_anonymous
, struct dwarf2_cu
*);
1687 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1689 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1691 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1692 struct dwarf2_cu
*);
1694 static struct die_info
*read_die_and_siblings_1
1695 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1698 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1699 const gdb_byte
*info_ptr
,
1700 const gdb_byte
**new_info_ptr
,
1701 struct die_info
*parent
);
1703 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1704 struct die_info
**, const gdb_byte
*,
1707 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1708 struct die_info
**, const gdb_byte
*,
1711 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1713 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1716 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1718 static const char *dwarf2_full_name (const char *name
,
1719 struct die_info
*die
,
1720 struct dwarf2_cu
*cu
);
1722 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1723 struct dwarf2_cu
*cu
);
1725 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1726 struct dwarf2_cu
**);
1728 static const char *dwarf_tag_name (unsigned int);
1730 static const char *dwarf_attr_name (unsigned int);
1732 static const char *dwarf_form_name (unsigned int);
1734 static const char *dwarf_bool_name (unsigned int);
1736 static const char *dwarf_type_encoding_name (unsigned int);
1738 static struct die_info
*sibling_die (struct die_info
*);
1740 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1742 static void dump_die_for_error (struct die_info
*);
1744 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1747 /*static*/ void dump_die (struct die_info
*, int max_level
);
1749 static void store_in_ref_table (struct die_info
*,
1750 struct dwarf2_cu
*);
1752 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1754 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1756 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1757 const struct attribute
*,
1758 struct dwarf2_cu
**);
1760 static struct die_info
*follow_die_ref (struct die_info
*,
1761 const struct attribute
*,
1762 struct dwarf2_cu
**);
1764 static struct die_info
*follow_die_sig (struct die_info
*,
1765 const struct attribute
*,
1766 struct dwarf2_cu
**);
1768 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1769 struct dwarf2_cu
*);
1771 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1772 const struct attribute
*,
1773 struct dwarf2_cu
*);
1775 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1777 static void read_signatured_type (struct signatured_type
*);
1779 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1780 struct die_info
*die
, struct dwarf2_cu
*cu
,
1781 struct dynamic_prop
*prop
);
1783 /* memory allocation interface */
1785 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1787 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1789 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1791 static int attr_form_is_block (const struct attribute
*);
1793 static int attr_form_is_section_offset (const struct attribute
*);
1795 static int attr_form_is_constant (const struct attribute
*);
1797 static int attr_form_is_ref (const struct attribute
*);
1799 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1800 struct dwarf2_loclist_baton
*baton
,
1801 const struct attribute
*attr
);
1803 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1805 struct dwarf2_cu
*cu
,
1808 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1809 const gdb_byte
*info_ptr
,
1810 struct abbrev_info
*abbrev
);
1812 static hashval_t
partial_die_hash (const void *item
);
1814 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1816 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1817 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1818 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1820 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1821 struct die_info
*comp_unit_die
,
1822 enum language pretend_language
);
1824 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1826 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1828 static struct type
*set_die_type (struct die_info
*, struct type
*,
1829 struct dwarf2_cu
*);
1831 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1833 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1835 static void load_full_comp_unit (struct dwarf2_per_cu_data
*,
1838 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1841 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1844 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1845 struct dwarf2_per_cu_data
*);
1847 static void dwarf2_mark (struct dwarf2_cu
*);
1849 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1851 static struct type
*get_die_type_at_offset (sect_offset
,
1852 struct dwarf2_per_cu_data
*);
1854 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1856 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1857 enum language pretend_language
);
1859 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1861 /* Class, the destructor of which frees all allocated queue entries. This
1862 will only have work to do if an error was thrown while processing the
1863 dwarf. If no error was thrown then the queue entries should have all
1864 been processed, and freed, as we went along. */
1866 class dwarf2_queue_guard
1869 dwarf2_queue_guard () = default;
1871 /* Free any entries remaining on the queue. There should only be
1872 entries left if we hit an error while processing the dwarf. */
1873 ~dwarf2_queue_guard ()
1875 struct dwarf2_queue_item
*item
, *last
;
1877 item
= dwarf2_queue
;
1880 /* Anything still marked queued is likely to be in an
1881 inconsistent state, so discard it. */
1882 if (item
->per_cu
->queued
)
1884 if (item
->per_cu
->cu
!= NULL
)
1885 free_one_cached_comp_unit (item
->per_cu
);
1886 item
->per_cu
->queued
= 0;
1894 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
1898 /* The return type of find_file_and_directory. Note, the enclosed
1899 string pointers are only valid while this object is valid. */
1901 struct file_and_directory
1903 /* The filename. This is never NULL. */
1906 /* The compilation directory. NULL if not known. If we needed to
1907 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1908 points directly to the DW_AT_comp_dir string attribute owned by
1909 the obstack that owns the DIE. */
1910 const char *comp_dir
;
1912 /* If we needed to build a new string for comp_dir, this is what
1913 owns the storage. */
1914 std::string comp_dir_storage
;
1917 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1918 struct dwarf2_cu
*cu
);
1920 static char *file_full_name (int file
, struct line_header
*lh
,
1921 const char *comp_dir
);
1923 /* Expected enum dwarf_unit_type for read_comp_unit_head. */
1924 enum class rcuh_kind
{ COMPILE
, TYPE
};
1926 static const gdb_byte
*read_and_check_comp_unit_head
1927 (struct dwarf2_per_objfile
* dwarf2_per_objfile
,
1928 struct comp_unit_head
*header
,
1929 struct dwarf2_section_info
*section
,
1930 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1931 rcuh_kind section_kind
);
1933 static void init_cutu_and_read_dies
1934 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1935 int use_existing_cu
, int keep
,
1936 die_reader_func_ftype
*die_reader_func
, void *data
);
1938 static void init_cutu_and_read_dies_simple
1939 (struct dwarf2_per_cu_data
*this_cu
,
1940 die_reader_func_ftype
*die_reader_func
, void *data
);
1942 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1944 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
1946 static struct dwo_unit
*lookup_dwo_unit_in_dwp
1947 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1948 struct dwp_file
*dwp_file
, const char *comp_dir
,
1949 ULONGEST signature
, int is_debug_types
);
1951 static struct dwp_file
*get_dwp_file
1952 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1954 static struct dwo_unit
*lookup_dwo_comp_unit
1955 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
1957 static struct dwo_unit
*lookup_dwo_type_unit
1958 (struct signatured_type
*, const char *, const char *);
1960 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
1962 static void free_dwo_file (struct dwo_file
*);
1964 /* A unique_ptr helper to free a dwo_file. */
1966 struct dwo_file_deleter
1968 void operator() (struct dwo_file
*df
) const
1974 /* A unique pointer to a dwo_file. */
1976 typedef std::unique_ptr
<struct dwo_file
, dwo_file_deleter
> dwo_file_up
;
1978 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1980 static void check_producer (struct dwarf2_cu
*cu
);
1982 static void free_line_header_voidp (void *arg
);
1984 /* Various complaints about symbol reading that don't abort the process. */
1987 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
1989 complaint (&symfile_complaints
,
1990 _("statement list doesn't fit in .debug_line section"));
1994 dwarf2_debug_line_missing_file_complaint (void)
1996 complaint (&symfile_complaints
,
1997 _(".debug_line section has line data without a file"));
2001 dwarf2_debug_line_missing_end_sequence_complaint (void)
2003 complaint (&symfile_complaints
,
2004 _(".debug_line section has line "
2005 "program sequence without an end"));
2009 dwarf2_complex_location_expr_complaint (void)
2011 complaint (&symfile_complaints
, _("location expression too complex"));
2015 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
2018 complaint (&symfile_complaints
,
2019 _("const value length mismatch for '%s', got %d, expected %d"),
2024 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
2026 complaint (&symfile_complaints
,
2027 _("debug info runs off end of %s section"
2029 get_section_name (section
),
2030 get_section_file_name (section
));
2034 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
2036 complaint (&symfile_complaints
,
2037 _("macro debug info contains a "
2038 "malformed macro definition:\n`%s'"),
2043 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
2045 complaint (&symfile_complaints
,
2046 _("invalid attribute class or form for '%s' in '%s'"),
2050 /* Hash function for line_header_hash. */
2053 line_header_hash (const struct line_header
*ofs
)
2055 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
2058 /* Hash function for htab_create_alloc_ex for line_header_hash. */
2061 line_header_hash_voidp (const void *item
)
2063 const struct line_header
*ofs
= (const struct line_header
*) item
;
2065 return line_header_hash (ofs
);
2068 /* Equality function for line_header_hash. */
2071 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
2073 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
2074 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
2076 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
2077 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
2082 /* Read the given attribute value as an address, taking the attribute's
2083 form into account. */
2086 attr_value_as_address (struct attribute
*attr
)
2090 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_GNU_addr_index
)
2092 /* Aside from a few clearly defined exceptions, attributes that
2093 contain an address must always be in DW_FORM_addr form.
2094 Unfortunately, some compilers happen to be violating this
2095 requirement by encoding addresses using other forms, such
2096 as DW_FORM_data4 for example. For those broken compilers,
2097 we try to do our best, without any guarantee of success,
2098 to interpret the address correctly. It would also be nice
2099 to generate a complaint, but that would require us to maintain
2100 a list of legitimate cases where a non-address form is allowed,
2101 as well as update callers to pass in at least the CU's DWARF
2102 version. This is more overhead than what we're willing to
2103 expand for a pretty rare case. */
2104 addr
= DW_UNSND (attr
);
2107 addr
= DW_ADDR (attr
);
2112 /* See declaration. */
2114 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
2115 const dwarf2_debug_sections
*names
)
2116 : objfile (objfile_
)
2119 names
= &dwarf2_elf_names
;
2121 bfd
*obfd
= objfile
->obfd
;
2123 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2124 locate_sections (obfd
, sec
, *names
);
2127 static void free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
);
2129 dwarf2_per_objfile::~dwarf2_per_objfile ()
2131 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
2132 free_cached_comp_units ();
2134 if (quick_file_names_table
)
2135 htab_delete (quick_file_names_table
);
2137 if (line_header_hash
)
2138 htab_delete (line_header_hash
);
2140 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
2141 VEC_free (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
);
2143 for (signatured_type
*sig_type
: all_type_units
)
2144 VEC_free (dwarf2_per_cu_ptr
, sig_type
->per_cu
.imported_symtabs
);
2146 VEC_free (dwarf2_section_info_def
, types
);
2148 if (dwo_files
!= NULL
)
2149 free_dwo_files (dwo_files
, objfile
);
2150 if (dwp_file
!= NULL
)
2151 gdb_bfd_unref (dwp_file
->dbfd
);
2153 if (dwz_file
!= NULL
&& dwz_file
->dwz_bfd
)
2154 gdb_bfd_unref (dwz_file
->dwz_bfd
);
2156 if (index_table
!= NULL
)
2157 index_table
->~mapped_index ();
2159 /* Everything else should be on the objfile obstack. */
2162 /* See declaration. */
2165 dwarf2_per_objfile::free_cached_comp_units ()
2167 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
2168 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
2169 while (per_cu
!= NULL
)
2171 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
2174 *last_chain
= next_cu
;
2179 /* A helper class that calls free_cached_comp_units on
2182 class free_cached_comp_units
2186 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
2187 : m_per_objfile (per_objfile
)
2191 ~free_cached_comp_units ()
2193 m_per_objfile
->free_cached_comp_units ();
2196 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
2200 dwarf2_per_objfile
*m_per_objfile
;
2203 /* Try to locate the sections we need for DWARF 2 debugging
2204 information and return true if we have enough to do something.
2205 NAMES points to the dwarf2 section names, or is NULL if the standard
2206 ELF names are used. */
2209 dwarf2_has_info (struct objfile
*objfile
,
2210 const struct dwarf2_debug_sections
*names
)
2212 if (objfile
->flags
& OBJF_READNEVER
)
2215 struct dwarf2_per_objfile
*dwarf2_per_objfile
2216 = get_dwarf2_per_objfile (objfile
);
2218 if (dwarf2_per_objfile
== NULL
)
2220 /* Initialize per-objfile state. */
2222 = new (&objfile
->objfile_obstack
) struct dwarf2_per_objfile (objfile
,
2224 set_dwarf2_per_objfile (objfile
, dwarf2_per_objfile
);
2226 return (!dwarf2_per_objfile
->info
.is_virtual
2227 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2228 && !dwarf2_per_objfile
->abbrev
.is_virtual
2229 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2232 /* Return the containing section of virtual section SECTION. */
2234 static struct dwarf2_section_info
*
2235 get_containing_section (const struct dwarf2_section_info
*section
)
2237 gdb_assert (section
->is_virtual
);
2238 return section
->s
.containing_section
;
2241 /* Return the bfd owner of SECTION. */
2244 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2246 if (section
->is_virtual
)
2248 section
= get_containing_section (section
);
2249 gdb_assert (!section
->is_virtual
);
2251 return section
->s
.section
->owner
;
2254 /* Return the bfd section of SECTION.
2255 Returns NULL if the section is not present. */
2258 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2260 if (section
->is_virtual
)
2262 section
= get_containing_section (section
);
2263 gdb_assert (!section
->is_virtual
);
2265 return section
->s
.section
;
2268 /* Return the name of SECTION. */
2271 get_section_name (const struct dwarf2_section_info
*section
)
2273 asection
*sectp
= get_section_bfd_section (section
);
2275 gdb_assert (sectp
!= NULL
);
2276 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2279 /* Return the name of the file SECTION is in. */
2282 get_section_file_name (const struct dwarf2_section_info
*section
)
2284 bfd
*abfd
= get_section_bfd_owner (section
);
2286 return bfd_get_filename (abfd
);
2289 /* Return the id of SECTION.
2290 Returns 0 if SECTION doesn't exist. */
2293 get_section_id (const struct dwarf2_section_info
*section
)
2295 asection
*sectp
= get_section_bfd_section (section
);
2302 /* Return the flags of SECTION.
2303 SECTION (or containing section if this is a virtual section) must exist. */
2306 get_section_flags (const struct dwarf2_section_info
*section
)
2308 asection
*sectp
= get_section_bfd_section (section
);
2310 gdb_assert (sectp
!= NULL
);
2311 return bfd_get_section_flags (sectp
->owner
, sectp
);
2314 /* When loading sections, we look either for uncompressed section or for
2315 compressed section names. */
2318 section_is_p (const char *section_name
,
2319 const struct dwarf2_section_names
*names
)
2321 if (names
->normal
!= NULL
2322 && strcmp (section_name
, names
->normal
) == 0)
2324 if (names
->compressed
!= NULL
2325 && strcmp (section_name
, names
->compressed
) == 0)
2330 /* See declaration. */
2333 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
2334 const dwarf2_debug_sections
&names
)
2336 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2338 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2341 else if (section_is_p (sectp
->name
, &names
.info
))
2343 this->info
.s
.section
= sectp
;
2344 this->info
.size
= bfd_get_section_size (sectp
);
2346 else if (section_is_p (sectp
->name
, &names
.abbrev
))
2348 this->abbrev
.s
.section
= sectp
;
2349 this->abbrev
.size
= bfd_get_section_size (sectp
);
2351 else if (section_is_p (sectp
->name
, &names
.line
))
2353 this->line
.s
.section
= sectp
;
2354 this->line
.size
= bfd_get_section_size (sectp
);
2356 else if (section_is_p (sectp
->name
, &names
.loc
))
2358 this->loc
.s
.section
= sectp
;
2359 this->loc
.size
= bfd_get_section_size (sectp
);
2361 else if (section_is_p (sectp
->name
, &names
.loclists
))
2363 this->loclists
.s
.section
= sectp
;
2364 this->loclists
.size
= bfd_get_section_size (sectp
);
2366 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2368 this->macinfo
.s
.section
= sectp
;
2369 this->macinfo
.size
= bfd_get_section_size (sectp
);
2371 else if (section_is_p (sectp
->name
, &names
.macro
))
2373 this->macro
.s
.section
= sectp
;
2374 this->macro
.size
= bfd_get_section_size (sectp
);
2376 else if (section_is_p (sectp
->name
, &names
.str
))
2378 this->str
.s
.section
= sectp
;
2379 this->str
.size
= bfd_get_section_size (sectp
);
2381 else if (section_is_p (sectp
->name
, &names
.line_str
))
2383 this->line_str
.s
.section
= sectp
;
2384 this->line_str
.size
= bfd_get_section_size (sectp
);
2386 else if (section_is_p (sectp
->name
, &names
.addr
))
2388 this->addr
.s
.section
= sectp
;
2389 this->addr
.size
= bfd_get_section_size (sectp
);
2391 else if (section_is_p (sectp
->name
, &names
.frame
))
2393 this->frame
.s
.section
= sectp
;
2394 this->frame
.size
= bfd_get_section_size (sectp
);
2396 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2398 this->eh_frame
.s
.section
= sectp
;
2399 this->eh_frame
.size
= bfd_get_section_size (sectp
);
2401 else if (section_is_p (sectp
->name
, &names
.ranges
))
2403 this->ranges
.s
.section
= sectp
;
2404 this->ranges
.size
= bfd_get_section_size (sectp
);
2406 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2408 this->rnglists
.s
.section
= sectp
;
2409 this->rnglists
.size
= bfd_get_section_size (sectp
);
2411 else if (section_is_p (sectp
->name
, &names
.types
))
2413 struct dwarf2_section_info type_section
;
2415 memset (&type_section
, 0, sizeof (type_section
));
2416 type_section
.s
.section
= sectp
;
2417 type_section
.size
= bfd_get_section_size (sectp
);
2419 VEC_safe_push (dwarf2_section_info_def
, this->types
,
2422 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2424 this->gdb_index
.s
.section
= sectp
;
2425 this->gdb_index
.size
= bfd_get_section_size (sectp
);
2427 else if (section_is_p (sectp
->name
, &names
.debug_names
))
2429 this->debug_names
.s
.section
= sectp
;
2430 this->debug_names
.size
= bfd_get_section_size (sectp
);
2432 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
2434 this->debug_aranges
.s
.section
= sectp
;
2435 this->debug_aranges
.size
= bfd_get_section_size (sectp
);
2438 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2439 && bfd_section_vma (abfd
, sectp
) == 0)
2440 this->has_section_at_zero
= true;
2443 /* A helper function that decides whether a section is empty,
2447 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2449 if (section
->is_virtual
)
2450 return section
->size
== 0;
2451 return section
->s
.section
== NULL
|| section
->size
== 0;
2454 /* See dwarf2read.h. */
2457 dwarf2_read_section (struct objfile
*objfile
, dwarf2_section_info
*info
)
2461 gdb_byte
*buf
, *retbuf
;
2465 info
->buffer
= NULL
;
2468 if (dwarf2_section_empty_p (info
))
2471 sectp
= get_section_bfd_section (info
);
2473 /* If this is a virtual section we need to read in the real one first. */
2474 if (info
->is_virtual
)
2476 struct dwarf2_section_info
*containing_section
=
2477 get_containing_section (info
);
2479 gdb_assert (sectp
!= NULL
);
2480 if ((sectp
->flags
& SEC_RELOC
) != 0)
2482 error (_("Dwarf Error: DWP format V2 with relocations is not"
2483 " supported in section %s [in module %s]"),
2484 get_section_name (info
), get_section_file_name (info
));
2486 dwarf2_read_section (objfile
, containing_section
);
2487 /* Other code should have already caught virtual sections that don't
2489 gdb_assert (info
->virtual_offset
+ info
->size
2490 <= containing_section
->size
);
2491 /* If the real section is empty or there was a problem reading the
2492 section we shouldn't get here. */
2493 gdb_assert (containing_section
->buffer
!= NULL
);
2494 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2498 /* If the section has relocations, we must read it ourselves.
2499 Otherwise we attach it to the BFD. */
2500 if ((sectp
->flags
& SEC_RELOC
) == 0)
2502 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2506 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2509 /* When debugging .o files, we may need to apply relocations; see
2510 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2511 We never compress sections in .o files, so we only need to
2512 try this when the section is not compressed. */
2513 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2516 info
->buffer
= retbuf
;
2520 abfd
= get_section_bfd_owner (info
);
2521 gdb_assert (abfd
!= NULL
);
2523 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2524 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2526 error (_("Dwarf Error: Can't read DWARF data"
2527 " in section %s [in module %s]"),
2528 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2532 /* A helper function that returns the size of a section in a safe way.
2533 If you are positive that the section has been read before using the
2534 size, then it is safe to refer to the dwarf2_section_info object's
2535 "size" field directly. In other cases, you must call this
2536 function, because for compressed sections the size field is not set
2537 correctly until the section has been read. */
2539 static bfd_size_type
2540 dwarf2_section_size (struct objfile
*objfile
,
2541 struct dwarf2_section_info
*info
)
2544 dwarf2_read_section (objfile
, info
);
2548 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2552 dwarf2_get_section_info (struct objfile
*objfile
,
2553 enum dwarf2_section_enum sect
,
2554 asection
**sectp
, const gdb_byte
**bufp
,
2555 bfd_size_type
*sizep
)
2557 struct dwarf2_per_objfile
*data
2558 = (struct dwarf2_per_objfile
*) objfile_data (objfile
,
2559 dwarf2_objfile_data_key
);
2560 struct dwarf2_section_info
*info
;
2562 /* We may see an objfile without any DWARF, in which case we just
2573 case DWARF2_DEBUG_FRAME
:
2574 info
= &data
->frame
;
2576 case DWARF2_EH_FRAME
:
2577 info
= &data
->eh_frame
;
2580 gdb_assert_not_reached ("unexpected section");
2583 dwarf2_read_section (objfile
, info
);
2585 *sectp
= get_section_bfd_section (info
);
2586 *bufp
= info
->buffer
;
2587 *sizep
= info
->size
;
2590 /* A helper function to find the sections for a .dwz file. */
2593 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2595 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2597 /* Note that we only support the standard ELF names, because .dwz
2598 is ELF-only (at the time of writing). */
2599 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2601 dwz_file
->abbrev
.s
.section
= sectp
;
2602 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2604 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2606 dwz_file
->info
.s
.section
= sectp
;
2607 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2609 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2611 dwz_file
->str
.s
.section
= sectp
;
2612 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2614 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2616 dwz_file
->line
.s
.section
= sectp
;
2617 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2619 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2621 dwz_file
->macro
.s
.section
= sectp
;
2622 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2624 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2626 dwz_file
->gdb_index
.s
.section
= sectp
;
2627 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2629 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2631 dwz_file
->debug_names
.s
.section
= sectp
;
2632 dwz_file
->debug_names
.size
= bfd_get_section_size (sectp
);
2636 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2637 there is no .gnu_debugaltlink section in the file. Error if there
2638 is such a section but the file cannot be found. */
2640 static struct dwz_file
*
2641 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2643 const char *filename
;
2644 struct dwz_file
*result
;
2645 bfd_size_type buildid_len_arg
;
2649 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2650 return dwarf2_per_objfile
->dwz_file
;
2652 bfd_set_error (bfd_error_no_error
);
2653 gdb::unique_xmalloc_ptr
<char> data
2654 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2655 &buildid_len_arg
, &buildid
));
2658 if (bfd_get_error () == bfd_error_no_error
)
2660 error (_("could not read '.gnu_debugaltlink' section: %s"),
2661 bfd_errmsg (bfd_get_error ()));
2664 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2666 buildid_len
= (size_t) buildid_len_arg
;
2668 filename
= data
.get ();
2670 std::string abs_storage
;
2671 if (!IS_ABSOLUTE_PATH (filename
))
2673 gdb::unique_xmalloc_ptr
<char> abs
2674 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2676 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2677 filename
= abs_storage
.c_str ();
2680 /* First try the file name given in the section. If that doesn't
2681 work, try to use the build-id instead. */
2682 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2683 if (dwz_bfd
!= NULL
)
2685 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2689 if (dwz_bfd
== NULL
)
2690 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2692 if (dwz_bfd
== NULL
)
2693 error (_("could not find '.gnu_debugaltlink' file for %s"),
2694 objfile_name (dwarf2_per_objfile
->objfile
));
2696 result
= OBSTACK_ZALLOC (&dwarf2_per_objfile
->objfile
->objfile_obstack
,
2698 result
->dwz_bfd
= dwz_bfd
.release ();
2700 bfd_map_over_sections (result
->dwz_bfd
, locate_dwz_sections
, result
);
2702 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, result
->dwz_bfd
);
2703 dwarf2_per_objfile
->dwz_file
= result
;
2707 /* DWARF quick_symbols_functions support. */
2709 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2710 unique line tables, so we maintain a separate table of all .debug_line
2711 derived entries to support the sharing.
2712 All the quick functions need is the list of file names. We discard the
2713 line_header when we're done and don't need to record it here. */
2714 struct quick_file_names
2716 /* The data used to construct the hash key. */
2717 struct stmt_list_hash hash
;
2719 /* The number of entries in file_names, real_names. */
2720 unsigned int num_file_names
;
2722 /* The file names from the line table, after being run through
2724 const char **file_names
;
2726 /* The file names from the line table after being run through
2727 gdb_realpath. These are computed lazily. */
2728 const char **real_names
;
2731 /* When using the index (and thus not using psymtabs), each CU has an
2732 object of this type. This is used to hold information needed by
2733 the various "quick" methods. */
2734 struct dwarf2_per_cu_quick_data
2736 /* The file table. This can be NULL if there was no file table
2737 or it's currently not read in.
2738 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2739 struct quick_file_names
*file_names
;
2741 /* The corresponding symbol table. This is NULL if symbols for this
2742 CU have not yet been read. */
2743 struct compunit_symtab
*compunit_symtab
;
2745 /* A temporary mark bit used when iterating over all CUs in
2746 expand_symtabs_matching. */
2747 unsigned int mark
: 1;
2749 /* True if we've tried to read the file table and found there isn't one.
2750 There will be no point in trying to read it again next time. */
2751 unsigned int no_file_data
: 1;
2754 /* Utility hash function for a stmt_list_hash. */
2757 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2761 if (stmt_list_hash
->dwo_unit
!= NULL
)
2762 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2763 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2767 /* Utility equality function for a stmt_list_hash. */
2770 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2771 const struct stmt_list_hash
*rhs
)
2773 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2775 if (lhs
->dwo_unit
!= NULL
2776 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2779 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2782 /* Hash function for a quick_file_names. */
2785 hash_file_name_entry (const void *e
)
2787 const struct quick_file_names
*file_data
2788 = (const struct quick_file_names
*) e
;
2790 return hash_stmt_list_entry (&file_data
->hash
);
2793 /* Equality function for a quick_file_names. */
2796 eq_file_name_entry (const void *a
, const void *b
)
2798 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2799 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2801 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2804 /* Delete function for a quick_file_names. */
2807 delete_file_name_entry (void *e
)
2809 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2812 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2814 xfree ((void*) file_data
->file_names
[i
]);
2815 if (file_data
->real_names
)
2816 xfree ((void*) file_data
->real_names
[i
]);
2819 /* The space for the struct itself lives on objfile_obstack,
2820 so we don't free it here. */
2823 /* Create a quick_file_names hash table. */
2826 create_quick_file_names_table (unsigned int nr_initial_entries
)
2828 return htab_create_alloc (nr_initial_entries
,
2829 hash_file_name_entry
, eq_file_name_entry
,
2830 delete_file_name_entry
, xcalloc
, xfree
);
2833 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2834 have to be created afterwards. You should call age_cached_comp_units after
2835 processing PER_CU->CU. dw2_setup must have been already called. */
2838 load_cu (struct dwarf2_per_cu_data
*per_cu
)
2840 if (per_cu
->is_debug_types
)
2841 load_full_type_unit (per_cu
);
2843 load_full_comp_unit (per_cu
, language_minimal
);
2845 if (per_cu
->cu
== NULL
)
2846 return; /* Dummy CU. */
2848 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2851 /* Read in the symbols for PER_CU. */
2854 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2856 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2858 /* Skip type_unit_groups, reading the type units they contain
2859 is handled elsewhere. */
2860 if (IS_TYPE_UNIT_GROUP (per_cu
))
2863 /* The destructor of dwarf2_queue_guard frees any entries left on
2864 the queue. After this point we're guaranteed to leave this function
2865 with the dwarf queue empty. */
2866 dwarf2_queue_guard q_guard
;
2868 if (dwarf2_per_objfile
->using_index
2869 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2870 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2872 queue_comp_unit (per_cu
, language_minimal
);
2875 /* If we just loaded a CU from a DWO, and we're working with an index
2876 that may badly handle TUs, load all the TUs in that DWO as well.
2877 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2878 if (!per_cu
->is_debug_types
2879 && per_cu
->cu
!= NULL
2880 && per_cu
->cu
->dwo_unit
!= NULL
2881 && dwarf2_per_objfile
->index_table
!= NULL
2882 && dwarf2_per_objfile
->index_table
->version
<= 7
2883 /* DWP files aren't supported yet. */
2884 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2885 queue_and_load_all_dwo_tus (per_cu
);
2888 process_queue (dwarf2_per_objfile
);
2890 /* Age the cache, releasing compilation units that have not
2891 been used recently. */
2892 age_cached_comp_units (dwarf2_per_objfile
);
2895 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2896 the objfile from which this CU came. Returns the resulting symbol
2899 static struct compunit_symtab
*
2900 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
)
2902 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2904 gdb_assert (dwarf2_per_objfile
->using_index
);
2905 if (!per_cu
->v
.quick
->compunit_symtab
)
2907 free_cached_comp_units
freer (dwarf2_per_objfile
);
2908 scoped_restore decrementer
= increment_reading_symtab ();
2909 dw2_do_instantiate_symtab (per_cu
);
2910 process_cu_includes (dwarf2_per_objfile
);
2913 return per_cu
->v
.quick
->compunit_symtab
;
2916 /* See declaration. */
2918 dwarf2_per_cu_data
*
2919 dwarf2_per_objfile::get_cutu (int index
)
2921 if (index
>= this->all_comp_units
.size ())
2923 index
-= this->all_comp_units
.size ();
2924 gdb_assert (index
< this->all_type_units
.size ());
2925 return &this->all_type_units
[index
]->per_cu
;
2928 return this->all_comp_units
[index
];
2931 /* See declaration. */
2933 dwarf2_per_cu_data
*
2934 dwarf2_per_objfile::get_cu (int index
)
2936 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2938 return this->all_comp_units
[index
];
2941 /* See declaration. */
2944 dwarf2_per_objfile::get_tu (int index
)
2946 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2948 return this->all_type_units
[index
];
2951 /* Return a new dwarf2_per_cu_data allocated on OBJFILE's
2952 objfile_obstack, and constructed with the specified field
2955 static dwarf2_per_cu_data
*
2956 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2957 struct dwarf2_section_info
*section
,
2959 sect_offset sect_off
, ULONGEST length
)
2961 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2962 dwarf2_per_cu_data
*the_cu
2963 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2964 struct dwarf2_per_cu_data
);
2965 the_cu
->sect_off
= sect_off
;
2966 the_cu
->length
= length
;
2967 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
2968 the_cu
->section
= section
;
2969 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2970 struct dwarf2_per_cu_quick_data
);
2971 the_cu
->is_dwz
= is_dwz
;
2975 /* A helper for create_cus_from_index that handles a given list of
2979 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2980 const gdb_byte
*cu_list
, offset_type n_elements
,
2981 struct dwarf2_section_info
*section
,
2984 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
2986 gdb_static_assert (sizeof (ULONGEST
) >= 8);
2988 sect_offset sect_off
2989 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
2990 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
2993 dwarf2_per_cu_data
*per_cu
2994 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
2996 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
3000 /* Read the CU list from the mapped index, and use it to create all
3001 the CU objects for this objfile. */
3004 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3005 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
3006 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
3008 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
3009 dwarf2_per_objfile
->all_comp_units
.reserve
3010 ((cu_list_elements
+ dwz_elements
) / 2);
3012 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3013 &dwarf2_per_objfile
->info
, 0);
3015 if (dwz_elements
== 0)
3018 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3019 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
3023 /* Create the signatured type hash table from the index. */
3026 create_signatured_type_table_from_index
3027 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3028 struct dwarf2_section_info
*section
,
3029 const gdb_byte
*bytes
,
3030 offset_type elements
)
3032 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3034 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3035 dwarf2_per_objfile
->all_type_units
.reserve (elements
/ 3);
3037 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3039 for (offset_type i
= 0; i
< elements
; i
+= 3)
3041 struct signatured_type
*sig_type
;
3044 cu_offset type_offset_in_tu
;
3046 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3047 sect_offset sect_off
3048 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
3050 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
3052 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
3055 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3056 struct signatured_type
);
3057 sig_type
->signature
= signature
;
3058 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3059 sig_type
->per_cu
.is_debug_types
= 1;
3060 sig_type
->per_cu
.section
= section
;
3061 sig_type
->per_cu
.sect_off
= sect_off
;
3062 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3063 sig_type
->per_cu
.v
.quick
3064 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3065 struct dwarf2_per_cu_quick_data
);
3067 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3070 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3073 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3076 /* Create the signatured type hash table from .debug_names. */
3079 create_signatured_type_table_from_debug_names
3080 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3081 const mapped_debug_names
&map
,
3082 struct dwarf2_section_info
*section
,
3083 struct dwarf2_section_info
*abbrev_section
)
3085 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3087 dwarf2_read_section (objfile
, section
);
3088 dwarf2_read_section (objfile
, abbrev_section
);
3090 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3091 dwarf2_per_objfile
->all_type_units
.reserve (map
.tu_count
);
3093 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3095 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
3097 struct signatured_type
*sig_type
;
3100 sect_offset sect_off
3101 = (sect_offset
) (extract_unsigned_integer
3102 (map
.tu_table_reordered
+ i
* map
.offset_size
,
3104 map
.dwarf5_byte_order
));
3106 comp_unit_head cu_header
;
3107 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
3109 section
->buffer
+ to_underlying (sect_off
),
3112 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3113 struct signatured_type
);
3114 sig_type
->signature
= cu_header
.signature
;
3115 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
3116 sig_type
->per_cu
.is_debug_types
= 1;
3117 sig_type
->per_cu
.section
= section
;
3118 sig_type
->per_cu
.sect_off
= sect_off
;
3119 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3120 sig_type
->per_cu
.v
.quick
3121 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3122 struct dwarf2_per_cu_quick_data
);
3124 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3127 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3130 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3133 /* Read the address map data from the mapped index, and use it to
3134 populate the objfile's psymtabs_addrmap. */
3137 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3138 struct mapped_index
*index
)
3140 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3141 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3142 const gdb_byte
*iter
, *end
;
3143 struct addrmap
*mutable_map
;
3146 auto_obstack temp_obstack
;
3148 mutable_map
= addrmap_create_mutable (&temp_obstack
);
3150 iter
= index
->address_table
.data ();
3151 end
= iter
+ index
->address_table
.size ();
3153 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3157 ULONGEST hi
, lo
, cu_index
;
3158 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3160 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3162 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
3167 complaint (&symfile_complaints
,
3168 _(".gdb_index address table has invalid range (%s - %s)"),
3169 hex_string (lo
), hex_string (hi
));
3173 if (cu_index
>= dwarf2_per_objfile
->all_comp_units
.size ())
3175 complaint (&symfile_complaints
,
3176 _(".gdb_index address table has invalid CU number %u"),
3177 (unsigned) cu_index
);
3181 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
);
3182 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
);
3183 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
3184 dwarf2_per_objfile
->get_cu (cu_index
));
3187 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3188 &objfile
->objfile_obstack
);
3191 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
3192 populate the objfile's psymtabs_addrmap. */
3195 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3196 struct dwarf2_section_info
*section
)
3198 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3199 bfd
*abfd
= objfile
->obfd
;
3200 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3201 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
3202 SECT_OFF_TEXT (objfile
));
3204 auto_obstack temp_obstack
;
3205 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
3207 std::unordered_map
<sect_offset
,
3208 dwarf2_per_cu_data
*,
3209 gdb::hash_enum
<sect_offset
>>
3210 debug_info_offset_to_per_cu
;
3211 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3213 const auto insertpair
3214 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
3215 if (!insertpair
.second
)
3217 warning (_("Section .debug_aranges in %s has duplicate "
3218 "debug_info_offset %s, ignoring .debug_aranges."),
3219 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
3224 dwarf2_read_section (objfile
, section
);
3226 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
3228 const gdb_byte
*addr
= section
->buffer
;
3230 while (addr
< section
->buffer
+ section
->size
)
3232 const gdb_byte
*const entry_addr
= addr
;
3233 unsigned int bytes_read
;
3235 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
3239 const gdb_byte
*const entry_end
= addr
+ entry_length
;
3240 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
3241 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
3242 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
3244 warning (_("Section .debug_aranges in %s entry at offset %zu "
3245 "length %s exceeds section length %s, "
3246 "ignoring .debug_aranges."),
3247 objfile_name (objfile
), entry_addr
- section
->buffer
,
3248 plongest (bytes_read
+ entry_length
),
3249 pulongest (section
->size
));
3253 /* The version number. */
3254 const uint16_t version
= read_2_bytes (abfd
, addr
);
3258 warning (_("Section .debug_aranges in %s entry at offset %zu "
3259 "has unsupported version %d, ignoring .debug_aranges."),
3260 objfile_name (objfile
), entry_addr
- section
->buffer
,
3265 const uint64_t debug_info_offset
3266 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
3267 addr
+= offset_size
;
3268 const auto per_cu_it
3269 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
3270 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
3272 warning (_("Section .debug_aranges in %s entry at offset %zu "
3273 "debug_info_offset %s does not exists, "
3274 "ignoring .debug_aranges."),
3275 objfile_name (objfile
), entry_addr
- section
->buffer
,
3276 pulongest (debug_info_offset
));
3279 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
3281 const uint8_t address_size
= *addr
++;
3282 if (address_size
< 1 || address_size
> 8)
3284 warning (_("Section .debug_aranges in %s entry at offset %zu "
3285 "address_size %u is invalid, ignoring .debug_aranges."),
3286 objfile_name (objfile
), entry_addr
- section
->buffer
,
3291 const uint8_t segment_selector_size
= *addr
++;
3292 if (segment_selector_size
!= 0)
3294 warning (_("Section .debug_aranges in %s entry at offset %zu "
3295 "segment_selector_size %u is not supported, "
3296 "ignoring .debug_aranges."),
3297 objfile_name (objfile
), entry_addr
- section
->buffer
,
3298 segment_selector_size
);
3302 /* Must pad to an alignment boundary that is twice the address
3303 size. It is undocumented by the DWARF standard but GCC does
3305 for (size_t padding
= ((-(addr
- section
->buffer
))
3306 & (2 * address_size
- 1));
3307 padding
> 0; padding
--)
3310 warning (_("Section .debug_aranges in %s entry at offset %zu "
3311 "padding is not zero, ignoring .debug_aranges."),
3312 objfile_name (objfile
), entry_addr
- section
->buffer
);
3318 if (addr
+ 2 * address_size
> entry_end
)
3320 warning (_("Section .debug_aranges in %s entry at offset %zu "
3321 "address list is not properly terminated, "
3322 "ignoring .debug_aranges."),
3323 objfile_name (objfile
), entry_addr
- section
->buffer
);
3326 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
3328 addr
+= address_size
;
3329 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
3331 addr
+= address_size
;
3332 if (start
== 0 && length
== 0)
3334 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3336 /* Symbol was eliminated due to a COMDAT group. */
3339 ULONGEST end
= start
+ length
;
3340 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
);
3341 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
);
3342 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
3346 objfile
->psymtabs_addrmap
= addrmap_create_fixed (mutable_map
,
3347 &objfile
->objfile_obstack
);
3350 /* Find a slot in the mapped index INDEX for the object named NAME.
3351 If NAME is found, set *VEC_OUT to point to the CU vector in the
3352 constant pool and return true. If NAME cannot be found, return
3356 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3357 offset_type
**vec_out
)
3360 offset_type slot
, step
;
3361 int (*cmp
) (const char *, const char *);
3363 gdb::unique_xmalloc_ptr
<char> without_params
;
3364 if (current_language
->la_language
== language_cplus
3365 || current_language
->la_language
== language_fortran
3366 || current_language
->la_language
== language_d
)
3368 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3371 if (strchr (name
, '(') != NULL
)
3373 without_params
= cp_remove_params (name
);
3375 if (without_params
!= NULL
)
3376 name
= without_params
.get ();
3380 /* Index version 4 did not support case insensitive searches. But the
3381 indices for case insensitive languages are built in lowercase, therefore
3382 simulate our NAME being searched is also lowercased. */
3383 hash
= mapped_index_string_hash ((index
->version
== 4
3384 && case_sensitivity
== case_sensitive_off
3385 ? 5 : index
->version
),
3388 slot
= hash
& (index
->symbol_table
.size () - 1);
3389 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
3390 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3396 const auto &bucket
= index
->symbol_table
[slot
];
3397 if (bucket
.name
== 0 && bucket
.vec
== 0)
3400 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
3401 if (!cmp (name
, str
))
3403 *vec_out
= (offset_type
*) (index
->constant_pool
3404 + MAYBE_SWAP (bucket
.vec
));
3408 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
3412 /* A helper function that reads the .gdb_index from SECTION and fills
3413 in MAP. FILENAME is the name of the file containing the section;
3414 it is used for error reporting. DEPRECATED_OK is true if it is
3415 ok to use deprecated sections.
3417 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3418 out parameters that are filled in with information about the CU and
3419 TU lists in the section.
3421 Returns 1 if all went well, 0 otherwise. */
3424 read_index_from_section (struct objfile
*objfile
,
3425 const char *filename
,
3427 struct dwarf2_section_info
*section
,
3428 struct mapped_index
*map
,
3429 const gdb_byte
**cu_list
,
3430 offset_type
*cu_list_elements
,
3431 const gdb_byte
**types_list
,
3432 offset_type
*types_list_elements
)
3434 const gdb_byte
*addr
;
3435 offset_type version
;
3436 offset_type
*metadata
;
3439 if (dwarf2_section_empty_p (section
))
3442 /* Older elfutils strip versions could keep the section in the main
3443 executable while splitting it for the separate debug info file. */
3444 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
3447 dwarf2_read_section (objfile
, section
);
3449 addr
= section
->buffer
;
3450 /* Version check. */
3451 version
= MAYBE_SWAP (*(offset_type
*) addr
);
3452 /* Versions earlier than 3 emitted every copy of a psymbol. This
3453 causes the index to behave very poorly for certain requests. Version 3
3454 contained incomplete addrmap. So, it seems better to just ignore such
3458 static int warning_printed
= 0;
3459 if (!warning_printed
)
3461 warning (_("Skipping obsolete .gdb_index section in %s."),
3463 warning_printed
= 1;
3467 /* Index version 4 uses a different hash function than index version
3470 Versions earlier than 6 did not emit psymbols for inlined
3471 functions. Using these files will cause GDB not to be able to
3472 set breakpoints on inlined functions by name, so we ignore these
3473 indices unless the user has done
3474 "set use-deprecated-index-sections on". */
3475 if (version
< 6 && !deprecated_ok
)
3477 static int warning_printed
= 0;
3478 if (!warning_printed
)
3481 Skipping deprecated .gdb_index section in %s.\n\
3482 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3483 to use the section anyway."),
3485 warning_printed
= 1;
3489 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3490 of the TU (for symbols coming from TUs),
3491 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3492 Plus gold-generated indices can have duplicate entries for global symbols,
3493 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3494 These are just performance bugs, and we can't distinguish gdb-generated
3495 indices from gold-generated ones, so issue no warning here. */
3497 /* Indexes with higher version than the one supported by GDB may be no
3498 longer backward compatible. */
3502 map
->version
= version
;
3503 map
->total_size
= section
->size
;
3505 metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3508 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3509 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3513 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3514 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3515 - MAYBE_SWAP (metadata
[i
]))
3519 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3520 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3522 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3525 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3526 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3528 = gdb::array_view
<mapped_index::symbol_table_slot
>
3529 ((mapped_index::symbol_table_slot
*) symbol_table
,
3530 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3533 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3538 /* Read .gdb_index. If everything went ok, initialize the "quick"
3539 elements of all the CUs and return 1. Otherwise, return 0. */
3542 dwarf2_read_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
3544 struct mapped_index local_map
, *map
;
3545 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3546 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3547 struct dwz_file
*dwz
;
3548 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3550 if (!read_index_from_section (objfile
, objfile_name (objfile
),
3551 use_deprecated_index_sections
,
3552 &dwarf2_per_objfile
->gdb_index
, &local_map
,
3553 &cu_list
, &cu_list_elements
,
3554 &types_list
, &types_list_elements
))
3557 /* Don't use the index if it's empty. */
3558 if (local_map
.symbol_table
.empty ())
3561 /* If there is a .dwz file, read it so we can get its CU list as
3563 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3566 struct mapped_index dwz_map
;
3567 const gdb_byte
*dwz_types_ignore
;
3568 offset_type dwz_types_elements_ignore
;
3570 if (!read_index_from_section (objfile
, bfd_get_filename (dwz
->dwz_bfd
),
3572 &dwz
->gdb_index
, &dwz_map
,
3573 &dwz_list
, &dwz_list_elements
,
3575 &dwz_types_elements_ignore
))
3577 warning (_("could not read '.gdb_index' section from %s; skipping"),
3578 bfd_get_filename (dwz
->dwz_bfd
));
3583 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3584 dwz_list
, dwz_list_elements
);
3586 if (types_list_elements
)
3588 struct dwarf2_section_info
*section
;
3590 /* We can only handle a single .debug_types when we have an
3592 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3595 section
= VEC_index (dwarf2_section_info_def
,
3596 dwarf2_per_objfile
->types
, 0);
3598 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3599 types_list
, types_list_elements
);
3602 create_addrmap_from_index (dwarf2_per_objfile
, &local_map
);
3604 map
= XOBNEW (&objfile
->objfile_obstack
, struct mapped_index
);
3605 map
= new (map
) mapped_index ();
3608 dwarf2_per_objfile
->index_table
= map
;
3609 dwarf2_per_objfile
->using_index
= 1;
3610 dwarf2_per_objfile
->quick_file_names_table
=
3611 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
3616 /* die_reader_func for dw2_get_file_names. */
3619 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3620 const gdb_byte
*info_ptr
,
3621 struct die_info
*comp_unit_die
,
3625 struct dwarf2_cu
*cu
= reader
->cu
;
3626 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3627 struct dwarf2_per_objfile
*dwarf2_per_objfile
3628 = cu
->per_cu
->dwarf2_per_objfile
;
3629 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3630 struct dwarf2_per_cu_data
*lh_cu
;
3631 struct attribute
*attr
;
3634 struct quick_file_names
*qfn
;
3636 gdb_assert (! this_cu
->is_debug_types
);
3638 /* Our callers never want to match partial units -- instead they
3639 will match the enclosing full CU. */
3640 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3642 this_cu
->v
.quick
->no_file_data
= 1;
3650 sect_offset line_offset
{};
3652 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3655 struct quick_file_names find_entry
;
3657 line_offset
= (sect_offset
) DW_UNSND (attr
);
3659 /* We may have already read in this line header (TU line header sharing).
3660 If we have we're done. */
3661 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3662 find_entry
.hash
.line_sect_off
= line_offset
;
3663 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3664 &find_entry
, INSERT
);
3667 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3671 lh
= dwarf_decode_line_header (line_offset
, cu
);
3675 lh_cu
->v
.quick
->no_file_data
= 1;
3679 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3680 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3681 qfn
->hash
.line_sect_off
= line_offset
;
3682 gdb_assert (slot
!= NULL
);
3685 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3687 qfn
->num_file_names
= lh
->file_names
.size ();
3689 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->file_names
.size ());
3690 for (i
= 0; i
< lh
->file_names
.size (); ++i
)
3691 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
3692 qfn
->real_names
= NULL
;
3694 lh_cu
->v
.quick
->file_names
= qfn
;
3697 /* A helper for the "quick" functions which attempts to read the line
3698 table for THIS_CU. */
3700 static struct quick_file_names
*
3701 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3703 /* This should never be called for TUs. */
3704 gdb_assert (! this_cu
->is_debug_types
);
3705 /* Nor type unit groups. */
3706 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3708 if (this_cu
->v
.quick
->file_names
!= NULL
)
3709 return this_cu
->v
.quick
->file_names
;
3710 /* If we know there is no line data, no point in looking again. */
3711 if (this_cu
->v
.quick
->no_file_data
)
3714 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3716 if (this_cu
->v
.quick
->no_file_data
)
3718 return this_cu
->v
.quick
->file_names
;
3721 /* A helper for the "quick" functions which computes and caches the
3722 real path for a given file name from the line table. */
3725 dw2_get_real_path (struct objfile
*objfile
,
3726 struct quick_file_names
*qfn
, int index
)
3728 if (qfn
->real_names
== NULL
)
3729 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3730 qfn
->num_file_names
, const char *);
3732 if (qfn
->real_names
[index
] == NULL
)
3733 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3735 return qfn
->real_names
[index
];
3738 static struct symtab
*
3739 dw2_find_last_source_symtab (struct objfile
*objfile
)
3741 struct dwarf2_per_objfile
*dwarf2_per_objfile
3742 = get_dwarf2_per_objfile (objfile
);
3743 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->all_comp_units
.back ();
3744 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
);
3749 return compunit_primary_filetab (cust
);
3752 /* Traversal function for dw2_forget_cached_source_info. */
3755 dw2_free_cached_file_names (void **slot
, void *info
)
3757 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3759 if (file_data
->real_names
)
3763 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3765 xfree ((void*) file_data
->real_names
[i
]);
3766 file_data
->real_names
[i
] = NULL
;
3774 dw2_forget_cached_source_info (struct objfile
*objfile
)
3776 struct dwarf2_per_objfile
*dwarf2_per_objfile
3777 = get_dwarf2_per_objfile (objfile
);
3779 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3780 dw2_free_cached_file_names
, NULL
);
3783 /* Helper function for dw2_map_symtabs_matching_filename that expands
3784 the symtabs and calls the iterator. */
3787 dw2_map_expand_apply (struct objfile
*objfile
,
3788 struct dwarf2_per_cu_data
*per_cu
,
3789 const char *name
, const char *real_path
,
3790 gdb::function_view
<bool (symtab
*)> callback
)
3792 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3794 /* Don't visit already-expanded CUs. */
3795 if (per_cu
->v
.quick
->compunit_symtab
)
3798 /* This may expand more than one symtab, and we want to iterate over
3800 dw2_instantiate_symtab (per_cu
);
3802 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3803 last_made
, callback
);
3806 /* Implementation of the map_symtabs_matching_filename method. */
3809 dw2_map_symtabs_matching_filename
3810 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3811 gdb::function_view
<bool (symtab
*)> callback
)
3813 const char *name_basename
= lbasename (name
);
3814 struct dwarf2_per_objfile
*dwarf2_per_objfile
3815 = get_dwarf2_per_objfile (objfile
);
3817 /* The rule is CUs specify all the files, including those used by
3818 any TU, so there's no need to scan TUs here. */
3820 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3822 /* We only need to look at symtabs not already expanded. */
3823 if (per_cu
->v
.quick
->compunit_symtab
)
3826 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3827 if (file_data
== NULL
)
3830 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3832 const char *this_name
= file_data
->file_names
[j
];
3833 const char *this_real_name
;
3835 if (compare_filenames_for_search (this_name
, name
))
3837 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3843 /* Before we invoke realpath, which can get expensive when many
3844 files are involved, do a quick comparison of the basenames. */
3845 if (! basenames_may_differ
3846 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3849 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3850 if (compare_filenames_for_search (this_real_name
, name
))
3852 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3858 if (real_path
!= NULL
)
3860 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3861 gdb_assert (IS_ABSOLUTE_PATH (name
));
3862 if (this_real_name
!= NULL
3863 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3865 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3877 /* Struct used to manage iterating over all CUs looking for a symbol. */
3879 struct dw2_symtab_iterator
3881 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3882 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3883 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3884 int want_specific_block
;
3885 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3886 Unused if !WANT_SPECIFIC_BLOCK. */
3888 /* The kind of symbol we're looking for. */
3890 /* The list of CUs from the index entry of the symbol,
3891 or NULL if not found. */
3893 /* The next element in VEC to look at. */
3895 /* The number of elements in VEC, or zero if there is no match. */
3897 /* Have we seen a global version of the symbol?
3898 If so we can ignore all further global instances.
3899 This is to work around gold/15646, inefficient gold-generated
3904 /* Initialize the index symtab iterator ITER.
3905 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3906 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3909 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3910 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3911 int want_specific_block
,
3916 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3917 iter
->want_specific_block
= want_specific_block
;
3918 iter
->block_index
= block_index
;
3919 iter
->domain
= domain
;
3921 iter
->global_seen
= 0;
3923 mapped_index
*index
= dwarf2_per_objfile
->index_table
;
3925 /* index is NULL if OBJF_READNOW. */
3926 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3927 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3935 /* Return the next matching CU or NULL if there are no more. */
3937 static struct dwarf2_per_cu_data
*
3938 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3940 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3942 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3944 offset_type cu_index_and_attrs
=
3945 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3946 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3947 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3948 /* This value is only valid for index versions >= 7. */
3949 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3950 gdb_index_symbol_kind symbol_kind
=
3951 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3952 /* Only check the symbol attributes if they're present.
3953 Indices prior to version 7 don't record them,
3954 and indices >= 7 may elide them for certain symbols
3955 (gold does this). */
3957 (dwarf2_per_objfile
->index_table
->version
>= 7
3958 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
3960 /* Don't crash on bad data. */
3961 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
3962 + dwarf2_per_objfile
->all_type_units
.size ()))
3964 complaint (&symfile_complaints
,
3965 _(".gdb_index entry has bad CU index"
3967 objfile_name (dwarf2_per_objfile
->objfile
));
3971 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
3973 /* Skip if already read in. */
3974 if (per_cu
->v
.quick
->compunit_symtab
)
3977 /* Check static vs global. */
3980 if (iter
->want_specific_block
3981 && want_static
!= is_static
)
3983 /* Work around gold/15646. */
3984 if (!is_static
&& iter
->global_seen
)
3987 iter
->global_seen
= 1;
3990 /* Only check the symbol's kind if it has one. */
3993 switch (iter
->domain
)
3996 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
3997 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
3998 /* Some types are also in VAR_DOMAIN. */
3999 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4003 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4007 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4022 static struct compunit_symtab
*
4023 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
4024 const char *name
, domain_enum domain
)
4026 struct compunit_symtab
*stab_best
= NULL
;
4027 struct dwarf2_per_objfile
*dwarf2_per_objfile
4028 = get_dwarf2_per_objfile (objfile
);
4030 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
4032 struct dw2_symtab_iterator iter
;
4033 struct dwarf2_per_cu_data
*per_cu
;
4035 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 1, block_index
, domain
, name
);
4037 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4039 struct symbol
*sym
, *with_opaque
= NULL
;
4040 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
4041 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
4042 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
4044 sym
= block_find_symbol (block
, name
, domain
,
4045 block_find_non_opaque_type_preferred
,
4048 /* Some caution must be observed with overloaded functions
4049 and methods, since the index will not contain any overload
4050 information (but NAME might contain it). */
4053 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
4055 if (with_opaque
!= NULL
4056 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
4059 /* Keep looking through other CUs. */
4066 dw2_print_stats (struct objfile
*objfile
)
4068 struct dwarf2_per_objfile
*dwarf2_per_objfile
4069 = get_dwarf2_per_objfile (objfile
);
4070 int total
= (dwarf2_per_objfile
->all_comp_units
.size ()
4071 + dwarf2_per_objfile
->all_type_units
.size ());
4074 for (int i
= 0; i
< total
; ++i
)
4076 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4078 if (!per_cu
->v
.quick
->compunit_symtab
)
4081 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
4082 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
4085 /* This dumps minimal information about the index.
4086 It is called via "mt print objfiles".
4087 One use is to verify .gdb_index has been loaded by the
4088 gdb.dwarf2/gdb-index.exp testcase. */
4091 dw2_dump (struct objfile
*objfile
)
4093 struct dwarf2_per_objfile
*dwarf2_per_objfile
4094 = get_dwarf2_per_objfile (objfile
);
4096 gdb_assert (dwarf2_per_objfile
->using_index
);
4097 printf_filtered (".gdb_index:");
4098 if (dwarf2_per_objfile
->index_table
!= NULL
)
4100 printf_filtered (" version %d\n",
4101 dwarf2_per_objfile
->index_table
->version
);
4104 printf_filtered (" faked for \"readnow\"\n");
4105 printf_filtered ("\n");
4109 dw2_relocate (struct objfile
*objfile
,
4110 const struct section_offsets
*new_offsets
,
4111 const struct section_offsets
*delta
)
4113 /* There's nothing to relocate here. */
4117 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
4118 const char *func_name
)
4120 struct dwarf2_per_objfile
*dwarf2_per_objfile
4121 = get_dwarf2_per_objfile (objfile
);
4123 struct dw2_symtab_iterator iter
;
4124 struct dwarf2_per_cu_data
*per_cu
;
4126 /* Note: It doesn't matter what we pass for block_index here. */
4127 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
4130 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4131 dw2_instantiate_symtab (per_cu
);
4136 dw2_expand_all_symtabs (struct objfile
*objfile
)
4138 struct dwarf2_per_objfile
*dwarf2_per_objfile
4139 = get_dwarf2_per_objfile (objfile
);
4140 int total_units
= (dwarf2_per_objfile
->all_comp_units
.size ()
4141 + dwarf2_per_objfile
->all_type_units
.size ());
4143 for (int i
= 0; i
< total_units
; ++i
)
4145 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4147 dw2_instantiate_symtab (per_cu
);
4152 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
4153 const char *fullname
)
4155 struct dwarf2_per_objfile
*dwarf2_per_objfile
4156 = get_dwarf2_per_objfile (objfile
);
4158 /* We don't need to consider type units here.
4159 This is only called for examining code, e.g. expand_line_sal.
4160 There can be an order of magnitude (or more) more type units
4161 than comp units, and we avoid them if we can. */
4163 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4165 /* We only need to look at symtabs not already expanded. */
4166 if (per_cu
->v
.quick
->compunit_symtab
)
4169 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4170 if (file_data
== NULL
)
4173 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4175 const char *this_fullname
= file_data
->file_names
[j
];
4177 if (filename_cmp (this_fullname
, fullname
) == 0)
4179 dw2_instantiate_symtab (per_cu
);
4187 dw2_map_matching_symbols (struct objfile
*objfile
,
4188 const char * name
, domain_enum domain
,
4190 int (*callback
) (struct block
*,
4191 struct symbol
*, void *),
4192 void *data
, symbol_name_match_type match
,
4193 symbol_compare_ftype
*ordered_compare
)
4195 /* Currently unimplemented; used for Ada. The function can be called if the
4196 current language is Ada for a non-Ada objfile using GNU index. As Ada
4197 does not look for non-Ada symbols this function should just return. */
4200 /* Symbol name matcher for .gdb_index names.
4202 Symbol names in .gdb_index have a few particularities:
4204 - There's no indication of which is the language of each symbol.
4206 Since each language has its own symbol name matching algorithm,
4207 and we don't know which language is the right one, we must match
4208 each symbol against all languages. This would be a potential
4209 performance problem if it were not mitigated by the
4210 mapped_index::name_components lookup table, which significantly
4211 reduces the number of times we need to call into this matcher,
4212 making it a non-issue.
4214 - Symbol names in the index have no overload (parameter)
4215 information. I.e., in C++, "foo(int)" and "foo(long)" both
4216 appear as "foo" in the index, for example.
4218 This means that the lookup names passed to the symbol name
4219 matcher functions must have no parameter information either
4220 because (e.g.) symbol search name "foo" does not match
4221 lookup-name "foo(int)" [while swapping search name for lookup
4224 class gdb_index_symbol_name_matcher
4227 /* Prepares the vector of comparison functions for LOOKUP_NAME. */
4228 gdb_index_symbol_name_matcher (const lookup_name_info
&lookup_name
);
4230 /* Walk all the matcher routines and match SYMBOL_NAME against them.
4231 Returns true if any matcher matches. */
4232 bool matches (const char *symbol_name
);
4235 /* A reference to the lookup name we're matching against. */
4236 const lookup_name_info
&m_lookup_name
;
4238 /* A vector holding all the different symbol name matchers, for all
4240 std::vector
<symbol_name_matcher_ftype
*> m_symbol_name_matcher_funcs
;
4243 gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher
4244 (const lookup_name_info
&lookup_name
)
4245 : m_lookup_name (lookup_name
)
4247 /* Prepare the vector of comparison functions upfront, to avoid
4248 doing the same work for each symbol. Care is taken to avoid
4249 matching with the same matcher more than once if/when multiple
4250 languages use the same matcher function. */
4251 auto &matchers
= m_symbol_name_matcher_funcs
;
4252 matchers
.reserve (nr_languages
);
4254 matchers
.push_back (default_symbol_name_matcher
);
4256 for (int i
= 0; i
< nr_languages
; i
++)
4258 const language_defn
*lang
= language_def ((enum language
) i
);
4259 symbol_name_matcher_ftype
*name_matcher
4260 = get_symbol_name_matcher (lang
, m_lookup_name
);
4262 /* Don't insert the same comparison routine more than once.
4263 Note that we do this linear walk instead of a seemingly
4264 cheaper sorted insert, or use a std::set or something like
4265 that, because relative order of function addresses is not
4266 stable. This is not a problem in practice because the number
4267 of supported languages is low, and the cost here is tiny
4268 compared to the number of searches we'll do afterwards using
4270 if (name_matcher
!= default_symbol_name_matcher
4271 && (std::find (matchers
.begin (), matchers
.end (), name_matcher
)
4272 == matchers
.end ()))
4273 matchers
.push_back (name_matcher
);
4278 gdb_index_symbol_name_matcher::matches (const char *symbol_name
)
4280 for (auto matches_name
: m_symbol_name_matcher_funcs
)
4281 if (matches_name (symbol_name
, m_lookup_name
, NULL
))
4287 /* Starting from a search name, return the string that finds the upper
4288 bound of all strings that start with SEARCH_NAME in a sorted name
4289 list. Returns the empty string to indicate that the upper bound is
4290 the end of the list. */
4293 make_sort_after_prefix_name (const char *search_name
)
4295 /* When looking to complete "func", we find the upper bound of all
4296 symbols that start with "func" by looking for where we'd insert
4297 the closest string that would follow "func" in lexicographical
4298 order. Usually, that's "func"-with-last-character-incremented,
4299 i.e. "fund". Mind non-ASCII characters, though. Usually those
4300 will be UTF-8 multi-byte sequences, but we can't be certain.
4301 Especially mind the 0xff character, which is a valid character in
4302 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
4303 rule out compilers allowing it in identifiers. Note that
4304 conveniently, strcmp/strcasecmp are specified to compare
4305 characters interpreted as unsigned char. So what we do is treat
4306 the whole string as a base 256 number composed of a sequence of
4307 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
4308 to 0, and carries 1 to the following more-significant position.
4309 If the very first character in SEARCH_NAME ends up incremented
4310 and carries/overflows, then the upper bound is the end of the
4311 list. The string after the empty string is also the empty
4314 Some examples of this operation:
4316 SEARCH_NAME => "+1" RESULT
4320 "\xff" "a" "\xff" => "\xff" "b"
4325 Then, with these symbols for example:
4331 completing "func" looks for symbols between "func" and
4332 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
4333 which finds "func" and "func1", but not "fund".
4337 funcÿ (Latin1 'ÿ' [0xff])
4341 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
4342 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
4346 ÿÿ (Latin1 'ÿ' [0xff])
4349 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
4350 the end of the list.
4352 std::string after
= search_name
;
4353 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
4355 if (!after
.empty ())
4356 after
.back () = (unsigned char) after
.back () + 1;
4360 /* See declaration. */
4362 std::pair
<std::vector
<name_component
>::const_iterator
,
4363 std::vector
<name_component
>::const_iterator
>
4364 mapped_index_base::find_name_components_bounds
4365 (const lookup_name_info
&lookup_name_without_params
) const
4368 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4371 = lookup_name_without_params
.cplus ().lookup_name ().c_str ();
4373 /* Comparison function object for lower_bound that matches against a
4374 given symbol name. */
4375 auto lookup_compare_lower
= [&] (const name_component
&elem
,
4378 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4379 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4380 return name_cmp (elem_name
, name
) < 0;
4383 /* Comparison function object for upper_bound that matches against a
4384 given symbol name. */
4385 auto lookup_compare_upper
= [&] (const char *name
,
4386 const name_component
&elem
)
4388 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4389 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4390 return name_cmp (name
, elem_name
) < 0;
4393 auto begin
= this->name_components
.begin ();
4394 auto end
= this->name_components
.end ();
4396 /* Find the lower bound. */
4399 if (lookup_name_without_params
.completion_mode () && cplus
[0] == '\0')
4402 return std::lower_bound (begin
, end
, cplus
, lookup_compare_lower
);
4405 /* Find the upper bound. */
4408 if (lookup_name_without_params
.completion_mode ())
4410 /* In completion mode, we want UPPER to point past all
4411 symbols names that have the same prefix. I.e., with
4412 these symbols, and completing "func":
4414 function << lower bound
4416 other_function << upper bound
4418 We find the upper bound by looking for the insertion
4419 point of "func"-with-last-character-incremented,
4421 std::string after
= make_sort_after_prefix_name (cplus
);
4424 return std::lower_bound (lower
, end
, after
.c_str (),
4425 lookup_compare_lower
);
4428 return std::upper_bound (lower
, end
, cplus
, lookup_compare_upper
);
4431 return {lower
, upper
};
4434 /* See declaration. */
4437 mapped_index_base::build_name_components ()
4439 if (!this->name_components
.empty ())
4442 this->name_components_casing
= case_sensitivity
;
4444 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4446 /* The code below only knows how to break apart components of C++
4447 symbol names (and other languages that use '::' as
4448 namespace/module separator). If we add support for wild matching
4449 to some language that uses some other operator (E.g., Ada, Go and
4450 D use '.'), then we'll need to try splitting the symbol name
4451 according to that language too. Note that Ada does support wild
4452 matching, but doesn't currently support .gdb_index. */
4453 auto count
= this->symbol_name_count ();
4454 for (offset_type idx
= 0; idx
< count
; idx
++)
4456 if (this->symbol_name_slot_invalid (idx
))
4459 const char *name
= this->symbol_name_at (idx
);
4461 /* Add each name component to the name component table. */
4462 unsigned int previous_len
= 0;
4463 for (unsigned int current_len
= cp_find_first_component (name
);
4464 name
[current_len
] != '\0';
4465 current_len
+= cp_find_first_component (name
+ current_len
))
4467 gdb_assert (name
[current_len
] == ':');
4468 this->name_components
.push_back ({previous_len
, idx
});
4469 /* Skip the '::'. */
4471 previous_len
= current_len
;
4473 this->name_components
.push_back ({previous_len
, idx
});
4476 /* Sort name_components elements by name. */
4477 auto name_comp_compare
= [&] (const name_component
&left
,
4478 const name_component
&right
)
4480 const char *left_qualified
= this->symbol_name_at (left
.idx
);
4481 const char *right_qualified
= this->symbol_name_at (right
.idx
);
4483 const char *left_name
= left_qualified
+ left
.name_offset
;
4484 const char *right_name
= right_qualified
+ right
.name_offset
;
4486 return name_cmp (left_name
, right_name
) < 0;
4489 std::sort (this->name_components
.begin (),
4490 this->name_components
.end (),
4494 /* Helper for dw2_expand_symtabs_matching that works with a
4495 mapped_index_base instead of the containing objfile. This is split
4496 to a separate function in order to be able to unit test the
4497 name_components matching using a mock mapped_index_base. For each
4498 symbol name that matches, calls MATCH_CALLBACK, passing it the
4499 symbol's index in the mapped_index_base symbol table. */
4502 dw2_expand_symtabs_matching_symbol
4503 (mapped_index_base
&index
,
4504 const lookup_name_info
&lookup_name_in
,
4505 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4506 enum search_domain kind
,
4507 gdb::function_view
<void (offset_type
)> match_callback
)
4509 lookup_name_info lookup_name_without_params
4510 = lookup_name_in
.make_ignore_params ();
4511 gdb_index_symbol_name_matcher lookup_name_matcher
4512 (lookup_name_without_params
);
4514 /* Build the symbol name component sorted vector, if we haven't
4516 index
.build_name_components ();
4518 auto bounds
= index
.find_name_components_bounds (lookup_name_without_params
);
4520 /* Now for each symbol name in range, check to see if we have a name
4521 match, and if so, call the MATCH_CALLBACK callback. */
4523 /* The same symbol may appear more than once in the range though.
4524 E.g., if we're looking for symbols that complete "w", and we have
4525 a symbol named "w1::w2", we'll find the two name components for
4526 that same symbol in the range. To be sure we only call the
4527 callback once per symbol, we first collect the symbol name
4528 indexes that matched in a temporary vector and ignore
4530 std::vector
<offset_type
> matches
;
4531 matches
.reserve (std::distance (bounds
.first
, bounds
.second
));
4533 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4535 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4537 if (!lookup_name_matcher
.matches (qualified
)
4538 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4541 matches
.push_back (bounds
.first
->idx
);
4544 std::sort (matches
.begin (), matches
.end ());
4546 /* Finally call the callback, once per match. */
4548 for (offset_type idx
: matches
)
4552 match_callback (idx
);
4557 /* Above we use a type wider than idx's for 'prev', since 0 and
4558 (offset_type)-1 are both possible values. */
4559 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4564 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4566 /* A mock .gdb_index/.debug_names-like name index table, enough to
4567 exercise dw2_expand_symtabs_matching_symbol, which works with the
4568 mapped_index_base interface. Builds an index from the symbol list
4569 passed as parameter to the constructor. */
4570 class mock_mapped_index
: public mapped_index_base
4573 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4574 : m_symbol_table (symbols
)
4577 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4579 /* Return the number of names in the symbol table. */
4580 size_t symbol_name_count () const override
4582 return m_symbol_table
.size ();
4585 /* Get the name of the symbol at IDX in the symbol table. */
4586 const char *symbol_name_at (offset_type idx
) const override
4588 return m_symbol_table
[idx
];
4592 gdb::array_view
<const char *> m_symbol_table
;
4595 /* Convenience function that converts a NULL pointer to a "<null>"
4596 string, to pass to print routines. */
4599 string_or_null (const char *str
)
4601 return str
!= NULL
? str
: "<null>";
4604 /* Check if a lookup_name_info built from
4605 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4606 index. EXPECTED_LIST is the list of expected matches, in expected
4607 matching order. If no match expected, then an empty list is
4608 specified. Returns true on success. On failure prints a warning
4609 indicating the file:line that failed, and returns false. */
4612 check_match (const char *file
, int line
,
4613 mock_mapped_index
&mock_index
,
4614 const char *name
, symbol_name_match_type match_type
,
4615 bool completion_mode
,
4616 std::initializer_list
<const char *> expected_list
)
4618 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4620 bool matched
= true;
4622 auto mismatch
= [&] (const char *expected_str
,
4625 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4626 "expected=\"%s\", got=\"%s\"\n"),
4628 (match_type
== symbol_name_match_type::FULL
4630 name
, string_or_null (expected_str
), string_or_null (got
));
4634 auto expected_it
= expected_list
.begin ();
4635 auto expected_end
= expected_list
.end ();
4637 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4639 [&] (offset_type idx
)
4641 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4642 const char *expected_str
4643 = expected_it
== expected_end
? NULL
: *expected_it
++;
4645 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4646 mismatch (expected_str
, matched_name
);
4649 const char *expected_str
4650 = expected_it
== expected_end
? NULL
: *expected_it
++;
4651 if (expected_str
!= NULL
)
4652 mismatch (expected_str
, NULL
);
4657 /* The symbols added to the mock mapped_index for testing (in
4659 static const char *test_symbols
[] = {
4668 "ns2::tmpl<int>::foo2",
4669 "(anonymous namespace)::A::B::C",
4671 /* These are used to check that the increment-last-char in the
4672 matching algorithm for completion doesn't match "t1_fund" when
4673 completing "t1_func". */
4679 /* A UTF-8 name with multi-byte sequences to make sure that
4680 cp-name-parser understands this as a single identifier ("função"
4681 is "function" in PT). */
4684 /* \377 (0xff) is Latin1 'ÿ'. */
4687 /* \377 (0xff) is Latin1 'ÿ'. */
4691 /* A name with all sorts of complications. Starts with "z" to make
4692 it easier for the completion tests below. */
4693 #define Z_SYM_NAME \
4694 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4695 "::tuple<(anonymous namespace)::ui*, " \
4696 "std::default_delete<(anonymous namespace)::ui>, void>"
4701 /* Returns true if the mapped_index_base::find_name_component_bounds
4702 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4703 in completion mode. */
4706 check_find_bounds_finds (mapped_index_base
&index
,
4707 const char *search_name
,
4708 gdb::array_view
<const char *> expected_syms
)
4710 lookup_name_info
lookup_name (search_name
,
4711 symbol_name_match_type::FULL
, true);
4713 auto bounds
= index
.find_name_components_bounds (lookup_name
);
4715 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4716 if (distance
!= expected_syms
.size ())
4719 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4721 auto nc_elem
= bounds
.first
+ exp_elem
;
4722 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4723 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4730 /* Test the lower-level mapped_index::find_name_component_bounds
4734 test_mapped_index_find_name_component_bounds ()
4736 mock_mapped_index
mock_index (test_symbols
);
4738 mock_index
.build_name_components ();
4740 /* Test the lower-level mapped_index::find_name_component_bounds
4741 method in completion mode. */
4743 static const char *expected_syms
[] = {
4748 SELF_CHECK (check_find_bounds_finds (mock_index
,
4749 "t1_func", expected_syms
));
4752 /* Check that the increment-last-char in the name matching algorithm
4753 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4755 static const char *expected_syms1
[] = {
4759 SELF_CHECK (check_find_bounds_finds (mock_index
,
4760 "\377", expected_syms1
));
4762 static const char *expected_syms2
[] = {
4765 SELF_CHECK (check_find_bounds_finds (mock_index
,
4766 "\377\377", expected_syms2
));
4770 /* Test dw2_expand_symtabs_matching_symbol. */
4773 test_dw2_expand_symtabs_matching_symbol ()
4775 mock_mapped_index
mock_index (test_symbols
);
4777 /* We let all tests run until the end even if some fails, for debug
4779 bool any_mismatch
= false;
4781 /* Create the expected symbols list (an initializer_list). Needed
4782 because lists have commas, and we need to pass them to CHECK,
4783 which is a macro. */
4784 #define EXPECT(...) { __VA_ARGS__ }
4786 /* Wrapper for check_match that passes down the current
4787 __FILE__/__LINE__. */
4788 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4789 any_mismatch |= !check_match (__FILE__, __LINE__, \
4791 NAME, MATCH_TYPE, COMPLETION_MODE, \
4794 /* Identity checks. */
4795 for (const char *sym
: test_symbols
)
4797 /* Should be able to match all existing symbols. */
4798 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4801 /* Should be able to match all existing symbols with
4803 std::string with_params
= std::string (sym
) + "(int)";
4804 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4807 /* Should be able to match all existing symbols with
4808 parameters and qualifiers. */
4809 with_params
= std::string (sym
) + " ( int ) const";
4810 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4813 /* This should really find sym, but cp-name-parser.y doesn't
4814 know about lvalue/rvalue qualifiers yet. */
4815 with_params
= std::string (sym
) + " ( int ) &&";
4816 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4820 /* Check that the name matching algorithm for completion doesn't get
4821 confused with Latin1 'ÿ' / 0xff. */
4823 static const char str
[] = "\377";
4824 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4825 EXPECT ("\377", "\377\377123"));
4828 /* Check that the increment-last-char in the matching algorithm for
4829 completion doesn't match "t1_fund" when completing "t1_func". */
4831 static const char str
[] = "t1_func";
4832 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4833 EXPECT ("t1_func", "t1_func1"));
4836 /* Check that completion mode works at each prefix of the expected
4839 static const char str
[] = "function(int)";
4840 size_t len
= strlen (str
);
4843 for (size_t i
= 1; i
< len
; i
++)
4845 lookup
.assign (str
, i
);
4846 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4847 EXPECT ("function"));
4851 /* While "w" is a prefix of both components, the match function
4852 should still only be called once. */
4854 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4856 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4860 /* Same, with a "complicated" symbol. */
4862 static const char str
[] = Z_SYM_NAME
;
4863 size_t len
= strlen (str
);
4866 for (size_t i
= 1; i
< len
; i
++)
4868 lookup
.assign (str
, i
);
4869 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4870 EXPECT (Z_SYM_NAME
));
4874 /* In FULL mode, an incomplete symbol doesn't match. */
4876 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4880 /* A complete symbol with parameters matches any overload, since the
4881 index has no overload info. */
4883 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4884 EXPECT ("std::zfunction", "std::zfunction2"));
4885 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4886 EXPECT ("std::zfunction", "std::zfunction2"));
4887 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4888 EXPECT ("std::zfunction", "std::zfunction2"));
4891 /* Check that whitespace is ignored appropriately. A symbol with a
4892 template argument list. */
4894 static const char expected
[] = "ns::foo<int>";
4895 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4897 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4901 /* Check that whitespace is ignored appropriately. A symbol with a
4902 template argument list that includes a pointer. */
4904 static const char expected
[] = "ns::foo<char*>";
4905 /* Try both completion and non-completion modes. */
4906 static const bool completion_mode
[2] = {false, true};
4907 for (size_t i
= 0; i
< 2; i
++)
4909 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4910 completion_mode
[i
], EXPECT (expected
));
4911 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4912 completion_mode
[i
], EXPECT (expected
));
4914 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4915 completion_mode
[i
], EXPECT (expected
));
4916 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4917 completion_mode
[i
], EXPECT (expected
));
4922 /* Check method qualifiers are ignored. */
4923 static const char expected
[] = "ns::foo<char*>";
4924 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4925 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4926 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4927 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4928 CHECK_MATCH ("foo < char * > ( int ) const",
4929 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4930 CHECK_MATCH ("foo < char * > ( int ) &&",
4931 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4934 /* Test lookup names that don't match anything. */
4936 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4939 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4943 /* Some wild matching tests, exercising "(anonymous namespace)",
4944 which should not be confused with a parameter list. */
4946 static const char *syms
[] = {
4950 "A :: B :: C ( int )",
4955 for (const char *s
: syms
)
4957 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4958 EXPECT ("(anonymous namespace)::A::B::C"));
4963 static const char expected
[] = "ns2::tmpl<int>::foo2";
4964 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
4966 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
4970 SELF_CHECK (!any_mismatch
);
4979 test_mapped_index_find_name_component_bounds ();
4980 test_dw2_expand_symtabs_matching_symbol ();
4983 }} // namespace selftests::dw2_expand_symtabs_matching
4985 #endif /* GDB_SELF_TEST */
4987 /* If FILE_MATCHER is NULL or if PER_CU has
4988 dwarf2_per_cu_quick_data::MARK set (see
4989 dw_expand_symtabs_matching_file_matcher), expand the CU and call
4990 EXPANSION_NOTIFY on it. */
4993 dw2_expand_symtabs_matching_one
4994 (struct dwarf2_per_cu_data
*per_cu
,
4995 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
4996 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
4998 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
5000 bool symtab_was_null
5001 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
5003 dw2_instantiate_symtab (per_cu
);
5005 if (expansion_notify
!= NULL
5007 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
5008 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
5012 /* Helper for dw2_expand_matching symtabs. Called on each symbol
5013 matched, to expand corresponding CUs that were marked. IDX is the
5014 index of the symbol name that matched. */
5017 dw2_expand_marked_cus
5018 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
5019 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5020 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5023 offset_type
*vec
, vec_len
, vec_idx
;
5024 bool global_seen
= false;
5025 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5027 vec
= (offset_type
*) (index
.constant_pool
5028 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
5029 vec_len
= MAYBE_SWAP (vec
[0]);
5030 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
5032 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
5033 /* This value is only valid for index versions >= 7. */
5034 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
5035 gdb_index_symbol_kind symbol_kind
=
5036 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
5037 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
5038 /* Only check the symbol attributes if they're present.
5039 Indices prior to version 7 don't record them,
5040 and indices >= 7 may elide them for certain symbols
5041 (gold does this). */
5044 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
5046 /* Work around gold/15646. */
5049 if (!is_static
&& global_seen
)
5055 /* Only check the symbol's kind if it has one. */
5060 case VARIABLES_DOMAIN
:
5061 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
5064 case FUNCTIONS_DOMAIN
:
5065 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
5069 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
5077 /* Don't crash on bad data. */
5078 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
5079 + dwarf2_per_objfile
->all_type_units
.size ()))
5081 complaint (&symfile_complaints
,
5082 _(".gdb_index entry has bad CU index"
5084 objfile_name (dwarf2_per_objfile
->objfile
));
5088 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
5089 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5094 /* If FILE_MATCHER is non-NULL, set all the
5095 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
5096 that match FILE_MATCHER. */
5099 dw_expand_symtabs_matching_file_matcher
5100 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5101 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
5103 if (file_matcher
== NULL
)
5106 objfile
*const objfile
= dwarf2_per_objfile
->objfile
;
5108 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
5110 NULL
, xcalloc
, xfree
));
5111 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
5113 NULL
, xcalloc
, xfree
));
5115 /* The rule is CUs specify all the files, including those used by
5116 any TU, so there's no need to scan TUs here. */
5118 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5122 per_cu
->v
.quick
->mark
= 0;
5124 /* We only need to look at symtabs not already expanded. */
5125 if (per_cu
->v
.quick
->compunit_symtab
)
5128 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5129 if (file_data
== NULL
)
5132 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
5134 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
5136 per_cu
->v
.quick
->mark
= 1;
5140 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5142 const char *this_real_name
;
5144 if (file_matcher (file_data
->file_names
[j
], false))
5146 per_cu
->v
.quick
->mark
= 1;
5150 /* Before we invoke realpath, which can get expensive when many
5151 files are involved, do a quick comparison of the basenames. */
5152 if (!basenames_may_differ
5153 && !file_matcher (lbasename (file_data
->file_names
[j
]),
5157 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
5158 if (file_matcher (this_real_name
, false))
5160 per_cu
->v
.quick
->mark
= 1;
5165 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
5166 ? visited_found
.get ()
5167 : visited_not_found
.get (),
5174 dw2_expand_symtabs_matching
5175 (struct objfile
*objfile
,
5176 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5177 const lookup_name_info
&lookup_name
,
5178 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5179 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5180 enum search_domain kind
)
5182 struct dwarf2_per_objfile
*dwarf2_per_objfile
5183 = get_dwarf2_per_objfile (objfile
);
5185 /* index_table is NULL if OBJF_READNOW. */
5186 if (!dwarf2_per_objfile
->index_table
)
5189 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5191 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5193 dw2_expand_symtabs_matching_symbol (index
, lookup_name
,
5195 kind
, [&] (offset_type idx
)
5197 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
5198 expansion_notify
, kind
);
5202 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
5205 static struct compunit_symtab
*
5206 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
5211 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
5212 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
5215 if (cust
->includes
== NULL
)
5218 for (i
= 0; cust
->includes
[i
]; ++i
)
5220 struct compunit_symtab
*s
= cust
->includes
[i
];
5222 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
5230 static struct compunit_symtab
*
5231 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
5232 struct bound_minimal_symbol msymbol
,
5234 struct obj_section
*section
,
5237 struct dwarf2_per_cu_data
*data
;
5238 struct compunit_symtab
*result
;
5240 if (!objfile
->psymtabs_addrmap
)
5243 data
= (struct dwarf2_per_cu_data
*) addrmap_find (objfile
->psymtabs_addrmap
,
5248 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
5249 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
5250 paddress (get_objfile_arch (objfile
), pc
));
5253 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
),
5255 gdb_assert (result
!= NULL
);
5260 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
5261 void *data
, int need_fullname
)
5263 struct dwarf2_per_objfile
*dwarf2_per_objfile
5264 = get_dwarf2_per_objfile (objfile
);
5266 if (!dwarf2_per_objfile
->filenames_cache
)
5268 dwarf2_per_objfile
->filenames_cache
.emplace ();
5270 htab_up
visited (htab_create_alloc (10,
5271 htab_hash_pointer
, htab_eq_pointer
,
5272 NULL
, xcalloc
, xfree
));
5274 /* The rule is CUs specify all the files, including those used
5275 by any TU, so there's no need to scan TUs here. We can
5276 ignore file names coming from already-expanded CUs. */
5278 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5280 if (per_cu
->v
.quick
->compunit_symtab
)
5282 void **slot
= htab_find_slot (visited
.get (),
5283 per_cu
->v
.quick
->file_names
,
5286 *slot
= per_cu
->v
.quick
->file_names
;
5290 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5292 /* We only need to look at symtabs not already expanded. */
5293 if (per_cu
->v
.quick
->compunit_symtab
)
5296 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5297 if (file_data
== NULL
)
5300 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
5303 /* Already visited. */
5308 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5310 const char *filename
= file_data
->file_names
[j
];
5311 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
5316 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
5318 gdb::unique_xmalloc_ptr
<char> this_real_name
;
5321 this_real_name
= gdb_realpath (filename
);
5322 (*fun
) (filename
, this_real_name
.get (), data
);
5327 dw2_has_symbols (struct objfile
*objfile
)
5332 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
5335 dw2_find_last_source_symtab
,
5336 dw2_forget_cached_source_info
,
5337 dw2_map_symtabs_matching_filename
,
5342 dw2_expand_symtabs_for_function
,
5343 dw2_expand_all_symtabs
,
5344 dw2_expand_symtabs_with_fullname
,
5345 dw2_map_matching_symbols
,
5346 dw2_expand_symtabs_matching
,
5347 dw2_find_pc_sect_compunit_symtab
,
5349 dw2_map_symbol_filenames
5352 /* DWARF-5 debug_names reader. */
5354 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
5355 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
5357 /* A helper function that reads the .debug_names section in SECTION
5358 and fills in MAP. FILENAME is the name of the file containing the
5359 section; it is used for error reporting.
5361 Returns true if all went well, false otherwise. */
5364 read_debug_names_from_section (struct objfile
*objfile
,
5365 const char *filename
,
5366 struct dwarf2_section_info
*section
,
5367 mapped_debug_names
&map
)
5369 if (dwarf2_section_empty_p (section
))
5372 /* Older elfutils strip versions could keep the section in the main
5373 executable while splitting it for the separate debug info file. */
5374 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
5377 dwarf2_read_section (objfile
, section
);
5379 map
.dwarf5_byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
5381 const gdb_byte
*addr
= section
->buffer
;
5383 bfd
*const abfd
= get_section_bfd_owner (section
);
5385 unsigned int bytes_read
;
5386 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
5389 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
5390 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
5391 if (bytes_read
+ length
!= section
->size
)
5393 /* There may be multiple per-CU indices. */
5394 warning (_("Section .debug_names in %s length %s does not match "
5395 "section length %s, ignoring .debug_names."),
5396 filename
, plongest (bytes_read
+ length
),
5397 pulongest (section
->size
));
5401 /* The version number. */
5402 uint16_t version
= read_2_bytes (abfd
, addr
);
5406 warning (_("Section .debug_names in %s has unsupported version %d, "
5407 "ignoring .debug_names."),
5413 uint16_t padding
= read_2_bytes (abfd
, addr
);
5417 warning (_("Section .debug_names in %s has unsupported padding %d, "
5418 "ignoring .debug_names."),
5423 /* comp_unit_count - The number of CUs in the CU list. */
5424 map
.cu_count
= read_4_bytes (abfd
, addr
);
5427 /* local_type_unit_count - The number of TUs in the local TU
5429 map
.tu_count
= read_4_bytes (abfd
, addr
);
5432 /* foreign_type_unit_count - The number of TUs in the foreign TU
5434 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
5436 if (foreign_tu_count
!= 0)
5438 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
5439 "ignoring .debug_names."),
5440 filename
, static_cast<unsigned long> (foreign_tu_count
));
5444 /* bucket_count - The number of hash buckets in the hash lookup
5446 map
.bucket_count
= read_4_bytes (abfd
, addr
);
5449 /* name_count - The number of unique names in the index. */
5450 map
.name_count
= read_4_bytes (abfd
, addr
);
5453 /* abbrev_table_size - The size in bytes of the abbreviations
5455 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
5458 /* augmentation_string_size - The size in bytes of the augmentation
5459 string. This value is rounded up to a multiple of 4. */
5460 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
5462 map
.augmentation_is_gdb
= ((augmentation_string_size
5463 == sizeof (dwarf5_augmentation
))
5464 && memcmp (addr
, dwarf5_augmentation
,
5465 sizeof (dwarf5_augmentation
)) == 0);
5466 augmentation_string_size
+= (-augmentation_string_size
) & 3;
5467 addr
+= augmentation_string_size
;
5470 map
.cu_table_reordered
= addr
;
5471 addr
+= map
.cu_count
* map
.offset_size
;
5473 /* List of Local TUs */
5474 map
.tu_table_reordered
= addr
;
5475 addr
+= map
.tu_count
* map
.offset_size
;
5477 /* Hash Lookup Table */
5478 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5479 addr
+= map
.bucket_count
* 4;
5480 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5481 addr
+= map
.name_count
* 4;
5484 map
.name_table_string_offs_reordered
= addr
;
5485 addr
+= map
.name_count
* map
.offset_size
;
5486 map
.name_table_entry_offs_reordered
= addr
;
5487 addr
+= map
.name_count
* map
.offset_size
;
5489 const gdb_byte
*abbrev_table_start
= addr
;
5492 unsigned int bytes_read
;
5493 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5498 const auto insertpair
5499 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5500 if (!insertpair
.second
)
5502 warning (_("Section .debug_names in %s has duplicate index %s, "
5503 "ignoring .debug_names."),
5504 filename
, pulongest (index_num
));
5507 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5508 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5513 mapped_debug_names::index_val::attr attr
;
5514 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5516 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5518 if (attr
.form
== DW_FORM_implicit_const
)
5520 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5524 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5526 indexval
.attr_vec
.push_back (std::move (attr
));
5529 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5531 warning (_("Section .debug_names in %s has abbreviation_table "
5532 "of size %zu vs. written as %u, ignoring .debug_names."),
5533 filename
, addr
- abbrev_table_start
, abbrev_table_size
);
5536 map
.entry_pool
= addr
;
5541 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5545 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5546 const mapped_debug_names
&map
,
5547 dwarf2_section_info
§ion
,
5550 sect_offset sect_off_prev
;
5551 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5553 sect_offset sect_off_next
;
5554 if (i
< map
.cu_count
)
5557 = (sect_offset
) (extract_unsigned_integer
5558 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5560 map
.dwarf5_byte_order
));
5563 sect_off_next
= (sect_offset
) section
.size
;
5566 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5567 dwarf2_per_cu_data
*per_cu
5568 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5569 sect_off_prev
, length
);
5570 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5572 sect_off_prev
= sect_off_next
;
5576 /* Read the CU list from the mapped index, and use it to create all
5577 the CU objects for this dwarf2_per_objfile. */
5580 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5581 const mapped_debug_names
&map
,
5582 const mapped_debug_names
&dwz_map
)
5584 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
5585 dwarf2_per_objfile
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5587 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5588 dwarf2_per_objfile
->info
,
5589 false /* is_dwz */);
5591 if (dwz_map
.cu_count
== 0)
5594 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5595 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5599 /* Read .debug_names. If everything went ok, initialize the "quick"
5600 elements of all the CUs and return true. Otherwise, return false. */
5603 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5605 mapped_debug_names
local_map (dwarf2_per_objfile
);
5606 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5607 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5609 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5610 &dwarf2_per_objfile
->debug_names
,
5614 /* Don't use the index if it's empty. */
5615 if (local_map
.name_count
== 0)
5618 /* If there is a .dwz file, read it so we can get its CU list as
5620 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5623 if (!read_debug_names_from_section (objfile
,
5624 bfd_get_filename (dwz
->dwz_bfd
),
5625 &dwz
->debug_names
, dwz_map
))
5627 warning (_("could not read '.debug_names' section from %s; skipping"),
5628 bfd_get_filename (dwz
->dwz_bfd
));
5633 create_cus_from_debug_names (dwarf2_per_objfile
, local_map
, dwz_map
);
5635 if (local_map
.tu_count
!= 0)
5637 /* We can only handle a single .debug_types when we have an
5639 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
5642 dwarf2_section_info
*section
= VEC_index (dwarf2_section_info_def
,
5643 dwarf2_per_objfile
->types
, 0);
5645 create_signatured_type_table_from_debug_names
5646 (dwarf2_per_objfile
, local_map
, section
, &dwarf2_per_objfile
->abbrev
);
5649 create_addrmap_from_aranges (dwarf2_per_objfile
,
5650 &dwarf2_per_objfile
->debug_aranges
);
5652 dwarf2_per_objfile
->debug_names_table
.reset
5653 (new mapped_debug_names (dwarf2_per_objfile
));
5654 *dwarf2_per_objfile
->debug_names_table
= std::move (local_map
);
5655 dwarf2_per_objfile
->using_index
= 1;
5656 dwarf2_per_objfile
->quick_file_names_table
=
5657 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
5662 /* Type used to manage iterating over all CUs looking for a symbol for
5665 class dw2_debug_names_iterator
5668 /* If WANT_SPECIFIC_BLOCK is true, only look for symbols in block
5669 BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
5670 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5671 bool want_specific_block
,
5672 block_enum block_index
, domain_enum domain
,
5674 : m_map (map
), m_want_specific_block (want_specific_block
),
5675 m_block_index (block_index
), m_domain (domain
),
5676 m_addr (find_vec_in_debug_names (map
, name
))
5679 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5680 search_domain search
, uint32_t namei
)
5683 m_addr (find_vec_in_debug_names (map
, namei
))
5686 /* Return the next matching CU or NULL if there are no more. */
5687 dwarf2_per_cu_data
*next ();
5690 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5692 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5695 /* The internalized form of .debug_names. */
5696 const mapped_debug_names
&m_map
;
5698 /* If true, only look for symbols that match BLOCK_INDEX. */
5699 const bool m_want_specific_block
= false;
5701 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
5702 Unused if !WANT_SPECIFIC_BLOCK - FIRST_LOCAL_BLOCK is an invalid
5704 const block_enum m_block_index
= FIRST_LOCAL_BLOCK
;
5706 /* The kind of symbol we're looking for. */
5707 const domain_enum m_domain
= UNDEF_DOMAIN
;
5708 const search_domain m_search
= ALL_DOMAIN
;
5710 /* The list of CUs from the index entry of the symbol, or NULL if
5712 const gdb_byte
*m_addr
;
5716 mapped_debug_names::namei_to_name (uint32_t namei
) const
5718 const ULONGEST namei_string_offs
5719 = extract_unsigned_integer ((name_table_string_offs_reordered
5720 + namei
* offset_size
),
5723 return read_indirect_string_at_offset
5724 (dwarf2_per_objfile
, dwarf2_per_objfile
->objfile
->obfd
, namei_string_offs
);
5727 /* Find a slot in .debug_names for the object named NAME. If NAME is
5728 found, return pointer to its pool data. If NAME cannot be found,
5732 dw2_debug_names_iterator::find_vec_in_debug_names
5733 (const mapped_debug_names
&map
, const char *name
)
5735 int (*cmp
) (const char *, const char *);
5737 if (current_language
->la_language
== language_cplus
5738 || current_language
->la_language
== language_fortran
5739 || current_language
->la_language
== language_d
)
5741 /* NAME is already canonical. Drop any qualifiers as
5742 .debug_names does not contain any. */
5744 if (strchr (name
, '(') != NULL
)
5746 gdb::unique_xmalloc_ptr
<char> without_params
5747 = cp_remove_params (name
);
5749 if (without_params
!= NULL
)
5751 name
= without_params
.get();
5756 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5758 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5760 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5761 (map
.bucket_table_reordered
5762 + (full_hash
% map
.bucket_count
)), 4,
5763 map
.dwarf5_byte_order
);
5767 if (namei
>= map
.name_count
)
5769 complaint (&symfile_complaints
,
5770 _("Wrong .debug_names with name index %u but name_count=%u "
5772 namei
, map
.name_count
,
5773 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5779 const uint32_t namei_full_hash
5780 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5781 (map
.hash_table_reordered
+ namei
), 4,
5782 map
.dwarf5_byte_order
);
5783 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5786 if (full_hash
== namei_full_hash
)
5788 const char *const namei_string
= map
.namei_to_name (namei
);
5790 #if 0 /* An expensive sanity check. */
5791 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5793 complaint (&symfile_complaints
,
5794 _("Wrong .debug_names hash for string at index %u "
5796 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5801 if (cmp (namei_string
, name
) == 0)
5803 const ULONGEST namei_entry_offs
5804 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5805 + namei
* map
.offset_size
),
5806 map
.offset_size
, map
.dwarf5_byte_order
);
5807 return map
.entry_pool
+ namei_entry_offs
;
5812 if (namei
>= map
.name_count
)
5818 dw2_debug_names_iterator::find_vec_in_debug_names
5819 (const mapped_debug_names
&map
, uint32_t namei
)
5821 if (namei
>= map
.name_count
)
5823 complaint (&symfile_complaints
,
5824 _("Wrong .debug_names with name index %u but name_count=%u "
5826 namei
, map
.name_count
,
5827 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5831 const ULONGEST namei_entry_offs
5832 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5833 + namei
* map
.offset_size
),
5834 map
.offset_size
, map
.dwarf5_byte_order
);
5835 return map
.entry_pool
+ namei_entry_offs
;
5838 /* See dw2_debug_names_iterator. */
5840 dwarf2_per_cu_data
*
5841 dw2_debug_names_iterator::next ()
5846 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5847 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5848 bfd
*const abfd
= objfile
->obfd
;
5852 unsigned int bytes_read
;
5853 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5854 m_addr
+= bytes_read
;
5858 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5859 if (indexval_it
== m_map
.abbrev_map
.cend ())
5861 complaint (&symfile_complaints
,
5862 _("Wrong .debug_names undefined abbrev code %s "
5864 pulongest (abbrev
), objfile_name (objfile
));
5867 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5868 bool have_is_static
= false;
5870 dwarf2_per_cu_data
*per_cu
= NULL
;
5871 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5876 case DW_FORM_implicit_const
:
5877 ull
= attr
.implicit_const
;
5879 case DW_FORM_flag_present
:
5883 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5884 m_addr
+= bytes_read
;
5887 complaint (&symfile_complaints
,
5888 _("Unsupported .debug_names form %s [in module %s]"),
5889 dwarf_form_name (attr
.form
),
5890 objfile_name (objfile
));
5893 switch (attr
.dw_idx
)
5895 case DW_IDX_compile_unit
:
5896 /* Don't crash on bad data. */
5897 if (ull
>= dwarf2_per_objfile
->all_comp_units
.size ())
5899 complaint (&symfile_complaints
,
5900 _(".debug_names entry has bad CU index %s"
5903 objfile_name (dwarf2_per_objfile
->objfile
));
5906 per_cu
= dwarf2_per_objfile
->get_cutu (ull
);
5908 case DW_IDX_type_unit
:
5909 /* Don't crash on bad data. */
5910 if (ull
>= dwarf2_per_objfile
->all_type_units
.size ())
5912 complaint (&symfile_complaints
,
5913 _(".debug_names entry has bad TU index %s"
5916 objfile_name (dwarf2_per_objfile
->objfile
));
5919 per_cu
= &dwarf2_per_objfile
->get_tu (ull
)->per_cu
;
5921 case DW_IDX_GNU_internal
:
5922 if (!m_map
.augmentation_is_gdb
)
5924 have_is_static
= true;
5927 case DW_IDX_GNU_external
:
5928 if (!m_map
.augmentation_is_gdb
)
5930 have_is_static
= true;
5936 /* Skip if already read in. */
5937 if (per_cu
->v
.quick
->compunit_symtab
)
5940 /* Check static vs global. */
5943 const bool want_static
= m_block_index
!= GLOBAL_BLOCK
;
5944 if (m_want_specific_block
&& want_static
!= is_static
)
5948 /* Match dw2_symtab_iter_next, symbol_kind
5949 and debug_names::psymbol_tag. */
5953 switch (indexval
.dwarf_tag
)
5955 case DW_TAG_variable
:
5956 case DW_TAG_subprogram
:
5957 /* Some types are also in VAR_DOMAIN. */
5958 case DW_TAG_typedef
:
5959 case DW_TAG_structure_type
:
5966 switch (indexval
.dwarf_tag
)
5968 case DW_TAG_typedef
:
5969 case DW_TAG_structure_type
:
5976 switch (indexval
.dwarf_tag
)
5979 case DW_TAG_variable
:
5989 /* Match dw2_expand_symtabs_matching, symbol_kind and
5990 debug_names::psymbol_tag. */
5993 case VARIABLES_DOMAIN
:
5994 switch (indexval
.dwarf_tag
)
5996 case DW_TAG_variable
:
6002 case FUNCTIONS_DOMAIN
:
6003 switch (indexval
.dwarf_tag
)
6005 case DW_TAG_subprogram
:
6012 switch (indexval
.dwarf_tag
)
6014 case DW_TAG_typedef
:
6015 case DW_TAG_structure_type
:
6028 static struct compunit_symtab
*
6029 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, int block_index_int
,
6030 const char *name
, domain_enum domain
)
6032 const block_enum block_index
= static_cast<block_enum
> (block_index_int
);
6033 struct dwarf2_per_objfile
*dwarf2_per_objfile
6034 = get_dwarf2_per_objfile (objfile
);
6036 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
6039 /* index is NULL if OBJF_READNOW. */
6042 const auto &map
= *mapp
;
6044 dw2_debug_names_iterator
iter (map
, true /* want_specific_block */,
6045 block_index
, domain
, name
);
6047 struct compunit_symtab
*stab_best
= NULL
;
6048 struct dwarf2_per_cu_data
*per_cu
;
6049 while ((per_cu
= iter
.next ()) != NULL
)
6051 struct symbol
*sym
, *with_opaque
= NULL
;
6052 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
);
6053 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
6054 struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
6056 sym
= block_find_symbol (block
, name
, domain
,
6057 block_find_non_opaque_type_preferred
,
6060 /* Some caution must be observed with overloaded functions and
6061 methods, since the index will not contain any overload
6062 information (but NAME might contain it). */
6065 && strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
6067 if (with_opaque
!= NULL
6068 && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque
), name
) == 0)
6071 /* Keep looking through other CUs. */
6077 /* This dumps minimal information about .debug_names. It is called
6078 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
6079 uses this to verify that .debug_names has been loaded. */
6082 dw2_debug_names_dump (struct objfile
*objfile
)
6084 struct dwarf2_per_objfile
*dwarf2_per_objfile
6085 = get_dwarf2_per_objfile (objfile
);
6087 gdb_assert (dwarf2_per_objfile
->using_index
);
6088 printf_filtered (".debug_names:");
6089 if (dwarf2_per_objfile
->debug_names_table
)
6090 printf_filtered (" exists\n");
6092 printf_filtered (" faked for \"readnow\"\n");
6093 printf_filtered ("\n");
6097 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
6098 const char *func_name
)
6100 struct dwarf2_per_objfile
*dwarf2_per_objfile
6101 = get_dwarf2_per_objfile (objfile
);
6103 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
6104 if (dwarf2_per_objfile
->debug_names_table
)
6106 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6108 /* Note: It doesn't matter what we pass for block_index here. */
6109 dw2_debug_names_iterator
iter (map
, false /* want_specific_block */,
6110 GLOBAL_BLOCK
, VAR_DOMAIN
, func_name
);
6112 struct dwarf2_per_cu_data
*per_cu
;
6113 while ((per_cu
= iter
.next ()) != NULL
)
6114 dw2_instantiate_symtab (per_cu
);
6119 dw2_debug_names_expand_symtabs_matching
6120 (struct objfile
*objfile
,
6121 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
6122 const lookup_name_info
&lookup_name
,
6123 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
6124 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
6125 enum search_domain kind
)
6127 struct dwarf2_per_objfile
*dwarf2_per_objfile
6128 = get_dwarf2_per_objfile (objfile
);
6130 /* debug_names_table is NULL if OBJF_READNOW. */
6131 if (!dwarf2_per_objfile
->debug_names_table
)
6134 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
6136 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6138 dw2_expand_symtabs_matching_symbol (map
, lookup_name
,
6140 kind
, [&] (offset_type namei
)
6142 /* The name was matched, now expand corresponding CUs that were
6144 dw2_debug_names_iterator
iter (map
, kind
, namei
);
6146 struct dwarf2_per_cu_data
*per_cu
;
6147 while ((per_cu
= iter
.next ()) != NULL
)
6148 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
6153 const struct quick_symbol_functions dwarf2_debug_names_functions
=
6156 dw2_find_last_source_symtab
,
6157 dw2_forget_cached_source_info
,
6158 dw2_map_symtabs_matching_filename
,
6159 dw2_debug_names_lookup_symbol
,
6161 dw2_debug_names_dump
,
6163 dw2_debug_names_expand_symtabs_for_function
,
6164 dw2_expand_all_symtabs
,
6165 dw2_expand_symtabs_with_fullname
,
6166 dw2_map_matching_symbols
,
6167 dw2_debug_names_expand_symtabs_matching
,
6168 dw2_find_pc_sect_compunit_symtab
,
6170 dw2_map_symbol_filenames
6173 /* See symfile.h. */
6176 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
6178 struct dwarf2_per_objfile
*dwarf2_per_objfile
6179 = get_dwarf2_per_objfile (objfile
);
6181 /* If we're about to read full symbols, don't bother with the
6182 indices. In this case we also don't care if some other debug
6183 format is making psymtabs, because they are all about to be
6185 if ((objfile
->flags
& OBJF_READNOW
))
6187 dwarf2_per_objfile
->using_index
= 1;
6188 create_all_comp_units (dwarf2_per_objfile
);
6189 create_all_type_units (dwarf2_per_objfile
);
6190 dwarf2_per_objfile
->quick_file_names_table
6191 = create_quick_file_names_table
6192 (dwarf2_per_objfile
->all_comp_units
.size ());
6194 for (int i
= 0; i
< (dwarf2_per_objfile
->all_comp_units
.size ()
6195 + dwarf2_per_objfile
->all_type_units
.size ()); ++i
)
6197 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
6199 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6200 struct dwarf2_per_cu_quick_data
);
6203 /* Return 1 so that gdb sees the "quick" functions. However,
6204 these functions will be no-ops because we will have expanded
6206 *index_kind
= dw_index_kind::GDB_INDEX
;
6210 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
6212 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6216 if (dwarf2_read_index (dwarf2_per_objfile
))
6218 *index_kind
= dw_index_kind::GDB_INDEX
;
6227 /* Build a partial symbol table. */
6230 dwarf2_build_psymtabs (struct objfile
*objfile
)
6232 struct dwarf2_per_objfile
*dwarf2_per_objfile
6233 = get_dwarf2_per_objfile (objfile
);
6235 if (objfile
->global_psymbols
.capacity () == 0
6236 && objfile
->static_psymbols
.capacity () == 0)
6237 init_psymbol_list (objfile
, 1024);
6241 /* This isn't really ideal: all the data we allocate on the
6242 objfile's obstack is still uselessly kept around. However,
6243 freeing it seems unsafe. */
6244 psymtab_discarder
psymtabs (objfile
);
6245 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
6248 CATCH (except
, RETURN_MASK_ERROR
)
6250 exception_print (gdb_stderr
, except
);
6255 /* Return the total length of the CU described by HEADER. */
6258 get_cu_length (const struct comp_unit_head
*header
)
6260 return header
->initial_length_size
+ header
->length
;
6263 /* Return TRUE if SECT_OFF is within CU_HEADER. */
6266 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
6268 sect_offset bottom
= cu_header
->sect_off
;
6269 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
6271 return sect_off
>= bottom
&& sect_off
< top
;
6274 /* Find the base address of the compilation unit for range lists and
6275 location lists. It will normally be specified by DW_AT_low_pc.
6276 In DWARF-3 draft 4, the base address could be overridden by
6277 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6278 compilation units with discontinuous ranges. */
6281 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6283 struct attribute
*attr
;
6286 cu
->base_address
= 0;
6288 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6291 cu
->base_address
= attr_value_as_address (attr
);
6296 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6299 cu
->base_address
= attr_value_as_address (attr
);
6305 /* Read in the comp unit header information from the debug_info at info_ptr.
6306 Use rcuh_kind::COMPILE as the default type if not known by the caller.
6307 NOTE: This leaves members offset, first_die_offset to be filled in
6310 static const gdb_byte
*
6311 read_comp_unit_head (struct comp_unit_head
*cu_header
,
6312 const gdb_byte
*info_ptr
,
6313 struct dwarf2_section_info
*section
,
6314 rcuh_kind section_kind
)
6317 unsigned int bytes_read
;
6318 const char *filename
= get_section_file_name (section
);
6319 bfd
*abfd
= get_section_bfd_owner (section
);
6321 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
6322 cu_header
->initial_length_size
= bytes_read
;
6323 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
6324 info_ptr
+= bytes_read
;
6325 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
6327 if (cu_header
->version
< 5)
6328 switch (section_kind
)
6330 case rcuh_kind::COMPILE
:
6331 cu_header
->unit_type
= DW_UT_compile
;
6333 case rcuh_kind::TYPE
:
6334 cu_header
->unit_type
= DW_UT_type
;
6337 internal_error (__FILE__
, __LINE__
,
6338 _("read_comp_unit_head: invalid section_kind"));
6342 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
6343 (read_1_byte (abfd
, info_ptr
));
6345 switch (cu_header
->unit_type
)
6348 if (section_kind
!= rcuh_kind::COMPILE
)
6349 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6350 "(is DW_UT_compile, should be DW_UT_type) [in module %s]"),
6354 section_kind
= rcuh_kind::TYPE
;
6357 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6358 "(is %d, should be %d or %d) [in module %s]"),
6359 cu_header
->unit_type
, DW_UT_compile
, DW_UT_type
, filename
);
6362 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6365 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
6368 info_ptr
+= bytes_read
;
6369 if (cu_header
->version
< 5)
6371 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6374 signed_addr
= bfd_get_sign_extend_vma (abfd
);
6375 if (signed_addr
< 0)
6376 internal_error (__FILE__
, __LINE__
,
6377 _("read_comp_unit_head: dwarf from non elf file"));
6378 cu_header
->signed_addr_p
= signed_addr
;
6380 if (section_kind
== rcuh_kind::TYPE
)
6382 LONGEST type_offset
;
6384 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
6387 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
6388 info_ptr
+= bytes_read
;
6389 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
6390 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
6391 error (_("Dwarf Error: Too big type_offset in compilation unit "
6392 "header (is %s) [in module %s]"), plongest (type_offset
),
6399 /* Helper function that returns the proper abbrev section for
6402 static struct dwarf2_section_info
*
6403 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6405 struct dwarf2_section_info
*abbrev
;
6406 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6408 if (this_cu
->is_dwz
)
6409 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
6411 abbrev
= &dwarf2_per_objfile
->abbrev
;
6416 /* Subroutine of read_and_check_comp_unit_head and
6417 read_and_check_type_unit_head to simplify them.
6418 Perform various error checking on the header. */
6421 error_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6422 struct comp_unit_head
*header
,
6423 struct dwarf2_section_info
*section
,
6424 struct dwarf2_section_info
*abbrev_section
)
6426 const char *filename
= get_section_file_name (section
);
6428 if (header
->version
< 2 || header
->version
> 5)
6429 error (_("Dwarf Error: wrong version in compilation unit header "
6430 "(is %d, should be 2, 3, 4 or 5) [in module %s]"), header
->version
,
6433 if (to_underlying (header
->abbrev_sect_off
)
6434 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
6435 error (_("Dwarf Error: bad offset (%s) in compilation unit header "
6436 "(offset %s + 6) [in module %s]"),
6437 sect_offset_str (header
->abbrev_sect_off
),
6438 sect_offset_str (header
->sect_off
),
6441 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
6442 avoid potential 32-bit overflow. */
6443 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
6445 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
6446 "(offset %s + 0) [in module %s]"),
6447 header
->length
, sect_offset_str (header
->sect_off
),
6451 /* Read in a CU/TU header and perform some basic error checking.
6452 The contents of the header are stored in HEADER.
6453 The result is a pointer to the start of the first DIE. */
6455 static const gdb_byte
*
6456 read_and_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6457 struct comp_unit_head
*header
,
6458 struct dwarf2_section_info
*section
,
6459 struct dwarf2_section_info
*abbrev_section
,
6460 const gdb_byte
*info_ptr
,
6461 rcuh_kind section_kind
)
6463 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
6465 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
6467 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
6469 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
6471 error_check_comp_unit_head (dwarf2_per_objfile
, header
, section
,
6477 /* Fetch the abbreviation table offset from a comp or type unit header. */
6480 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6481 struct dwarf2_section_info
*section
,
6482 sect_offset sect_off
)
6484 bfd
*abfd
= get_section_bfd_owner (section
);
6485 const gdb_byte
*info_ptr
;
6486 unsigned int initial_length_size
, offset_size
;
6489 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
6490 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6491 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6492 offset_size
= initial_length_size
== 4 ? 4 : 8;
6493 info_ptr
+= initial_length_size
;
6495 version
= read_2_bytes (abfd
, info_ptr
);
6499 /* Skip unit type and address size. */
6503 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
6506 /* Allocate a new partial symtab for file named NAME and mark this new
6507 partial symtab as being an include of PST. */
6510 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
6511 struct objfile
*objfile
)
6513 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
6515 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6517 /* It shares objfile->objfile_obstack. */
6518 subpst
->dirname
= pst
->dirname
;
6521 subpst
->textlow
= 0;
6522 subpst
->texthigh
= 0;
6524 subpst
->dependencies
6525 = XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
6526 subpst
->dependencies
[0] = pst
;
6527 subpst
->number_of_dependencies
= 1;
6529 subpst
->globals_offset
= 0;
6530 subpst
->n_global_syms
= 0;
6531 subpst
->statics_offset
= 0;
6532 subpst
->n_static_syms
= 0;
6533 subpst
->compunit_symtab
= NULL
;
6534 subpst
->read_symtab
= pst
->read_symtab
;
6537 /* No private part is necessary for include psymtabs. This property
6538 can be used to differentiate between such include psymtabs and
6539 the regular ones. */
6540 subpst
->read_symtab_private
= NULL
;
6543 /* Read the Line Number Program data and extract the list of files
6544 included by the source file represented by PST. Build an include
6545 partial symtab for each of these included files. */
6548 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6549 struct die_info
*die
,
6550 struct partial_symtab
*pst
)
6553 struct attribute
*attr
;
6555 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6557 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6559 return; /* No linetable, so no includes. */
6561 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). */
6562 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
, pst
->textlow
, 1);
6566 hash_signatured_type (const void *item
)
6568 const struct signatured_type
*sig_type
6569 = (const struct signatured_type
*) item
;
6571 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6572 return sig_type
->signature
;
6576 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6578 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6579 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6581 return lhs
->signature
== rhs
->signature
;
6584 /* Allocate a hash table for signatured types. */
6587 allocate_signatured_type_table (struct objfile
*objfile
)
6589 return htab_create_alloc_ex (41,
6590 hash_signatured_type
,
6593 &objfile
->objfile_obstack
,
6594 hashtab_obstack_allocate
,
6595 dummy_obstack_deallocate
);
6598 /* A helper function to add a signatured type CU to a table. */
6601 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6603 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6604 std::vector
<signatured_type
*> *all_type_units
6605 = (std::vector
<signatured_type
*> *) datum
;
6607 all_type_units
->push_back (sigt
);
6612 /* A helper for create_debug_types_hash_table. Read types from SECTION
6613 and fill them into TYPES_HTAB. It will process only type units,
6614 therefore DW_UT_type. */
6617 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6618 struct dwo_file
*dwo_file
,
6619 dwarf2_section_info
*section
, htab_t
&types_htab
,
6620 rcuh_kind section_kind
)
6622 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6623 struct dwarf2_section_info
*abbrev_section
;
6625 const gdb_byte
*info_ptr
, *end_ptr
;
6627 abbrev_section
= (dwo_file
!= NULL
6628 ? &dwo_file
->sections
.abbrev
6629 : &dwarf2_per_objfile
->abbrev
);
6631 if (dwarf_read_debug
)
6632 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6633 get_section_name (section
),
6634 get_section_file_name (abbrev_section
));
6636 dwarf2_read_section (objfile
, section
);
6637 info_ptr
= section
->buffer
;
6639 if (info_ptr
== NULL
)
6642 /* We can't set abfd until now because the section may be empty or
6643 not present, in which case the bfd is unknown. */
6644 abfd
= get_section_bfd_owner (section
);
6646 /* We don't use init_cutu_and_read_dies_simple, or some such, here
6647 because we don't need to read any dies: the signature is in the
6650 end_ptr
= info_ptr
+ section
->size
;
6651 while (info_ptr
< end_ptr
)
6653 struct signatured_type
*sig_type
;
6654 struct dwo_unit
*dwo_tu
;
6656 const gdb_byte
*ptr
= info_ptr
;
6657 struct comp_unit_head header
;
6658 unsigned int length
;
6660 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6662 /* Initialize it due to a false compiler warning. */
6663 header
.signature
= -1;
6664 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6666 /* We need to read the type's signature in order to build the hash
6667 table, but we don't need anything else just yet. */
6669 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6670 abbrev_section
, ptr
, section_kind
);
6672 length
= get_cu_length (&header
);
6674 /* Skip dummy type units. */
6675 if (ptr
>= info_ptr
+ length
6676 || peek_abbrev_code (abfd
, ptr
) == 0
6677 || header
.unit_type
!= DW_UT_type
)
6683 if (types_htab
== NULL
)
6686 types_htab
= allocate_dwo_unit_table (objfile
);
6688 types_htab
= allocate_signatured_type_table (objfile
);
6694 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6696 dwo_tu
->dwo_file
= dwo_file
;
6697 dwo_tu
->signature
= header
.signature
;
6698 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6699 dwo_tu
->section
= section
;
6700 dwo_tu
->sect_off
= sect_off
;
6701 dwo_tu
->length
= length
;
6705 /* N.B.: type_offset is not usable if this type uses a DWO file.
6706 The real type_offset is in the DWO file. */
6708 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6709 struct signatured_type
);
6710 sig_type
->signature
= header
.signature
;
6711 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6712 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6713 sig_type
->per_cu
.is_debug_types
= 1;
6714 sig_type
->per_cu
.section
= section
;
6715 sig_type
->per_cu
.sect_off
= sect_off
;
6716 sig_type
->per_cu
.length
= length
;
6719 slot
= htab_find_slot (types_htab
,
6720 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6722 gdb_assert (slot
!= NULL
);
6725 sect_offset dup_sect_off
;
6729 const struct dwo_unit
*dup_tu
6730 = (const struct dwo_unit
*) *slot
;
6732 dup_sect_off
= dup_tu
->sect_off
;
6736 const struct signatured_type
*dup_tu
6737 = (const struct signatured_type
*) *slot
;
6739 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6742 complaint (&symfile_complaints
,
6743 _("debug type entry at offset %s is duplicate to"
6744 " the entry at offset %s, signature %s"),
6745 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6746 hex_string (header
.signature
));
6748 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6750 if (dwarf_read_debug
> 1)
6751 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6752 sect_offset_str (sect_off
),
6753 hex_string (header
.signature
));
6759 /* Create the hash table of all entries in the .debug_types
6760 (or .debug_types.dwo) section(s).
6761 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6762 otherwise it is NULL.
6764 The result is a pointer to the hash table or NULL if there are no types.
6766 Note: This function processes DWO files only, not DWP files. */
6769 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6770 struct dwo_file
*dwo_file
,
6771 VEC (dwarf2_section_info_def
) *types
,
6775 struct dwarf2_section_info
*section
;
6777 if (VEC_empty (dwarf2_section_info_def
, types
))
6781 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
6783 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, section
,
6784 types_htab
, rcuh_kind::TYPE
);
6787 /* Create the hash table of all entries in the .debug_types section,
6788 and initialize all_type_units.
6789 The result is zero if there is an error (e.g. missing .debug_types section),
6790 otherwise non-zero. */
6793 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6795 htab_t types_htab
= NULL
;
6797 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6798 &dwarf2_per_objfile
->info
, types_htab
,
6799 rcuh_kind::COMPILE
);
6800 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6801 dwarf2_per_objfile
->types
, types_htab
);
6802 if (types_htab
== NULL
)
6804 dwarf2_per_objfile
->signatured_types
= NULL
;
6808 dwarf2_per_objfile
->signatured_types
= types_htab
;
6810 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
6811 dwarf2_per_objfile
->all_type_units
.reserve (htab_elements (types_htab
));
6813 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
,
6814 &dwarf2_per_objfile
->all_type_units
);
6819 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6820 If SLOT is non-NULL, it is the entry to use in the hash table.
6821 Otherwise we find one. */
6823 static struct signatured_type
*
6824 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6827 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6829 if (dwarf2_per_objfile
->all_type_units
.size ()
6830 == dwarf2_per_objfile
->all_type_units
.capacity ())
6831 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6833 signatured_type
*sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6834 struct signatured_type
);
6836 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
6837 sig_type
->signature
= sig
;
6838 sig_type
->per_cu
.is_debug_types
= 1;
6839 if (dwarf2_per_objfile
->using_index
)
6841 sig_type
->per_cu
.v
.quick
=
6842 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6843 struct dwarf2_per_cu_quick_data
);
6848 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6851 gdb_assert (*slot
== NULL
);
6853 /* The rest of sig_type must be filled in by the caller. */
6857 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6858 Fill in SIG_ENTRY with DWO_ENTRY. */
6861 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6862 struct signatured_type
*sig_entry
,
6863 struct dwo_unit
*dwo_entry
)
6865 /* Make sure we're not clobbering something we don't expect to. */
6866 gdb_assert (! sig_entry
->per_cu
.queued
);
6867 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6868 if (dwarf2_per_objfile
->using_index
)
6870 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6871 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6874 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6875 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6876 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6877 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6878 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6880 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6881 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6882 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6883 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6884 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6885 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6886 sig_entry
->dwo_unit
= dwo_entry
;
6889 /* Subroutine of lookup_signatured_type.
6890 If we haven't read the TU yet, create the signatured_type data structure
6891 for a TU to be read in directly from a DWO file, bypassing the stub.
6892 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6893 using .gdb_index, then when reading a CU we want to stay in the DWO file
6894 containing that CU. Otherwise we could end up reading several other DWO
6895 files (due to comdat folding) to process the transitive closure of all the
6896 mentioned TUs, and that can be slow. The current DWO file will have every
6897 type signature that it needs.
6898 We only do this for .gdb_index because in the psymtab case we already have
6899 to read all the DWOs to build the type unit groups. */
6901 static struct signatured_type
*
6902 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6904 struct dwarf2_per_objfile
*dwarf2_per_objfile
6905 = cu
->per_cu
->dwarf2_per_objfile
;
6906 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6907 struct dwo_file
*dwo_file
;
6908 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6909 struct signatured_type find_sig_entry
, *sig_entry
;
6912 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6914 /* If TU skeletons have been removed then we may not have read in any
6916 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6918 dwarf2_per_objfile
->signatured_types
6919 = allocate_signatured_type_table (objfile
);
6922 /* We only ever need to read in one copy of a signatured type.
6923 Use the global signatured_types array to do our own comdat-folding
6924 of types. If this is the first time we're reading this TU, and
6925 the TU has an entry in .gdb_index, replace the recorded data from
6926 .gdb_index with this TU. */
6928 find_sig_entry
.signature
= sig
;
6929 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6930 &find_sig_entry
, INSERT
);
6931 sig_entry
= (struct signatured_type
*) *slot
;
6933 /* We can get here with the TU already read, *or* in the process of being
6934 read. Don't reassign the global entry to point to this DWO if that's
6935 the case. Also note that if the TU is already being read, it may not
6936 have come from a DWO, the program may be a mix of Fission-compiled
6937 code and non-Fission-compiled code. */
6939 /* Have we already tried to read this TU?
6940 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
6941 needn't exist in the global table yet). */
6942 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
6945 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
6946 dwo_unit of the TU itself. */
6947 dwo_file
= cu
->dwo_unit
->dwo_file
;
6949 /* Ok, this is the first time we're reading this TU. */
6950 if (dwo_file
->tus
== NULL
)
6952 find_dwo_entry
.signature
= sig
;
6953 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
6954 if (dwo_entry
== NULL
)
6957 /* If the global table doesn't have an entry for this TU, add one. */
6958 if (sig_entry
== NULL
)
6959 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
6961 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
6962 sig_entry
->per_cu
.tu_read
= 1;
6966 /* Subroutine of lookup_signatured_type.
6967 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
6968 then try the DWP file. If the TU stub (skeleton) has been removed then
6969 it won't be in .gdb_index. */
6971 static struct signatured_type
*
6972 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6974 struct dwarf2_per_objfile
*dwarf2_per_objfile
6975 = cu
->per_cu
->dwarf2_per_objfile
;
6976 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6977 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
6978 struct dwo_unit
*dwo_entry
;
6979 struct signatured_type find_sig_entry
, *sig_entry
;
6982 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
6983 gdb_assert (dwp_file
!= NULL
);
6985 /* If TU skeletons have been removed then we may not have read in any
6987 if (dwarf2_per_objfile
->signatured_types
== NULL
)
6989 dwarf2_per_objfile
->signatured_types
6990 = allocate_signatured_type_table (objfile
);
6993 find_sig_entry
.signature
= sig
;
6994 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6995 &find_sig_entry
, INSERT
);
6996 sig_entry
= (struct signatured_type
*) *slot
;
6998 /* Have we already tried to read this TU?
6999 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
7000 needn't exist in the global table yet). */
7001 if (sig_entry
!= NULL
)
7004 if (dwp_file
->tus
== NULL
)
7006 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
7007 sig
, 1 /* is_debug_types */);
7008 if (dwo_entry
== NULL
)
7011 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
7012 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7017 /* Lookup a signature based type for DW_FORM_ref_sig8.
7018 Returns NULL if signature SIG is not present in the table.
7019 It is up to the caller to complain about this. */
7021 static struct signatured_type
*
7022 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7024 struct dwarf2_per_objfile
*dwarf2_per_objfile
7025 = cu
->per_cu
->dwarf2_per_objfile
;
7028 && dwarf2_per_objfile
->using_index
)
7030 /* We're in a DWO/DWP file, and we're using .gdb_index.
7031 These cases require special processing. */
7032 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
7033 return lookup_dwo_signatured_type (cu
, sig
);
7035 return lookup_dwp_signatured_type (cu
, sig
);
7039 struct signatured_type find_entry
, *entry
;
7041 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7043 find_entry
.signature
= sig
;
7044 entry
= ((struct signatured_type
*)
7045 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
7050 /* Low level DIE reading support. */
7052 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
7055 init_cu_die_reader (struct die_reader_specs
*reader
,
7056 struct dwarf2_cu
*cu
,
7057 struct dwarf2_section_info
*section
,
7058 struct dwo_file
*dwo_file
,
7059 struct abbrev_table
*abbrev_table
)
7061 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
7062 reader
->abfd
= get_section_bfd_owner (section
);
7064 reader
->dwo_file
= dwo_file
;
7065 reader
->die_section
= section
;
7066 reader
->buffer
= section
->buffer
;
7067 reader
->buffer_end
= section
->buffer
+ section
->size
;
7068 reader
->comp_dir
= NULL
;
7069 reader
->abbrev_table
= abbrev_table
;
7072 /* Subroutine of init_cutu_and_read_dies to simplify it.
7073 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
7074 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
7077 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
7078 from it to the DIE in the DWO. If NULL we are skipping the stub.
7079 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
7080 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
7081 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
7082 STUB_COMP_DIR may be non-NULL.
7083 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
7084 are filled in with the info of the DIE from the DWO file.
7085 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
7086 from the dwo. Since *RESULT_READER references this abbrev table, it must be
7087 kept around for at least as long as *RESULT_READER.
7089 The result is non-zero if a valid (non-dummy) DIE was found. */
7092 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
7093 struct dwo_unit
*dwo_unit
,
7094 struct die_info
*stub_comp_unit_die
,
7095 const char *stub_comp_dir
,
7096 struct die_reader_specs
*result_reader
,
7097 const gdb_byte
**result_info_ptr
,
7098 struct die_info
**result_comp_unit_die
,
7099 int *result_has_children
,
7100 abbrev_table_up
*result_dwo_abbrev_table
)
7102 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7103 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7104 struct dwarf2_cu
*cu
= this_cu
->cu
;
7106 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7107 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
7108 int i
,num_extra_attrs
;
7109 struct dwarf2_section_info
*dwo_abbrev_section
;
7110 struct attribute
*attr
;
7111 struct die_info
*comp_unit_die
;
7113 /* At most one of these may be provided. */
7114 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
7116 /* These attributes aren't processed until later:
7117 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
7118 DW_AT_comp_dir is used now, to find the DWO file, but it is also
7119 referenced later. However, these attributes are found in the stub
7120 which we won't have later. In order to not impose this complication
7121 on the rest of the code, we read them here and copy them to the
7130 if (stub_comp_unit_die
!= NULL
)
7132 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
7134 if (! this_cu
->is_debug_types
)
7135 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
7136 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
7137 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
7138 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
7139 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
7141 /* There should be a DW_AT_addr_base attribute here (if needed).
7142 We need the value before we can process DW_FORM_GNU_addr_index. */
7144 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
7146 cu
->addr_base
= DW_UNSND (attr
);
7148 /* There should be a DW_AT_ranges_base attribute here (if needed).
7149 We need the value before we can process DW_AT_ranges. */
7150 cu
->ranges_base
= 0;
7151 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
7153 cu
->ranges_base
= DW_UNSND (attr
);
7155 else if (stub_comp_dir
!= NULL
)
7157 /* Reconstruct the comp_dir attribute to simplify the code below. */
7158 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
7159 comp_dir
->name
= DW_AT_comp_dir
;
7160 comp_dir
->form
= DW_FORM_string
;
7161 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
7162 DW_STRING (comp_dir
) = stub_comp_dir
;
7165 /* Set up for reading the DWO CU/TU. */
7166 cu
->dwo_unit
= dwo_unit
;
7167 dwarf2_section_info
*section
= dwo_unit
->section
;
7168 dwarf2_read_section (objfile
, section
);
7169 abfd
= get_section_bfd_owner (section
);
7170 begin_info_ptr
= info_ptr
= (section
->buffer
7171 + to_underlying (dwo_unit
->sect_off
));
7172 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
7174 if (this_cu
->is_debug_types
)
7176 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
7178 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7179 &cu
->header
, section
,
7181 info_ptr
, rcuh_kind::TYPE
);
7182 /* This is not an assert because it can be caused by bad debug info. */
7183 if (sig_type
->signature
!= cu
->header
.signature
)
7185 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
7186 " TU at offset %s [in module %s]"),
7187 hex_string (sig_type
->signature
),
7188 hex_string (cu
->header
.signature
),
7189 sect_offset_str (dwo_unit
->sect_off
),
7190 bfd_get_filename (abfd
));
7192 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7193 /* For DWOs coming from DWP files, we don't know the CU length
7194 nor the type's offset in the TU until now. */
7195 dwo_unit
->length
= get_cu_length (&cu
->header
);
7196 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
7198 /* Establish the type offset that can be used to lookup the type.
7199 For DWO files, we don't know it until now. */
7200 sig_type
->type_offset_in_section
7201 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
7205 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7206 &cu
->header
, section
,
7208 info_ptr
, rcuh_kind::COMPILE
);
7209 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7210 /* For DWOs coming from DWP files, we don't know the CU length
7212 dwo_unit
->length
= get_cu_length (&cu
->header
);
7215 *result_dwo_abbrev_table
7216 = abbrev_table_read_table (dwarf2_per_objfile
, dwo_abbrev_section
,
7217 cu
->header
.abbrev_sect_off
);
7218 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
7219 result_dwo_abbrev_table
->get ());
7221 /* Read in the die, but leave space to copy over the attributes
7222 from the stub. This has the benefit of simplifying the rest of
7223 the code - all the work to maintain the illusion of a single
7224 DW_TAG_{compile,type}_unit DIE is done here. */
7225 num_extra_attrs
= ((stmt_list
!= NULL
)
7229 + (comp_dir
!= NULL
));
7230 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
7231 result_has_children
, num_extra_attrs
);
7233 /* Copy over the attributes from the stub to the DIE we just read in. */
7234 comp_unit_die
= *result_comp_unit_die
;
7235 i
= comp_unit_die
->num_attrs
;
7236 if (stmt_list
!= NULL
)
7237 comp_unit_die
->attrs
[i
++] = *stmt_list
;
7239 comp_unit_die
->attrs
[i
++] = *low_pc
;
7240 if (high_pc
!= NULL
)
7241 comp_unit_die
->attrs
[i
++] = *high_pc
;
7243 comp_unit_die
->attrs
[i
++] = *ranges
;
7244 if (comp_dir
!= NULL
)
7245 comp_unit_die
->attrs
[i
++] = *comp_dir
;
7246 comp_unit_die
->num_attrs
+= num_extra_attrs
;
7248 if (dwarf_die_debug
)
7250 fprintf_unfiltered (gdb_stdlog
,
7251 "Read die from %s@0x%x of %s:\n",
7252 get_section_name (section
),
7253 (unsigned) (begin_info_ptr
- section
->buffer
),
7254 bfd_get_filename (abfd
));
7255 dump_die (comp_unit_die
, dwarf_die_debug
);
7258 /* Save the comp_dir attribute. If there is no DWP file then we'll read
7259 TUs by skipping the stub and going directly to the entry in the DWO file.
7260 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
7261 to get it via circuitous means. Blech. */
7262 if (comp_dir
!= NULL
)
7263 result_reader
->comp_dir
= DW_STRING (comp_dir
);
7265 /* Skip dummy compilation units. */
7266 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
7267 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7270 *result_info_ptr
= info_ptr
;
7274 /* Subroutine of init_cutu_and_read_dies to simplify it.
7275 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
7276 Returns NULL if the specified DWO unit cannot be found. */
7278 static struct dwo_unit
*
7279 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
7280 struct die_info
*comp_unit_die
)
7282 struct dwarf2_cu
*cu
= this_cu
->cu
;
7284 struct dwo_unit
*dwo_unit
;
7285 const char *comp_dir
, *dwo_name
;
7287 gdb_assert (cu
!= NULL
);
7289 /* Yeah, we look dwo_name up again, but it simplifies the code. */
7290 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7291 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7293 if (this_cu
->is_debug_types
)
7295 struct signatured_type
*sig_type
;
7297 /* Since this_cu is the first member of struct signatured_type,
7298 we can go from a pointer to one to a pointer to the other. */
7299 sig_type
= (struct signatured_type
*) this_cu
;
7300 signature
= sig_type
->signature
;
7301 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
7305 struct attribute
*attr
;
7307 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
7309 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
7311 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
7312 signature
= DW_UNSND (attr
);
7313 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
7320 /* Subroutine of init_cutu_and_read_dies to simplify it.
7321 See it for a description of the parameters.
7322 Read a TU directly from a DWO file, bypassing the stub. */
7325 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
7326 int use_existing_cu
, int keep
,
7327 die_reader_func_ftype
*die_reader_func
,
7330 std::unique_ptr
<dwarf2_cu
> new_cu
;
7331 struct signatured_type
*sig_type
;
7332 struct die_reader_specs reader
;
7333 const gdb_byte
*info_ptr
;
7334 struct die_info
*comp_unit_die
;
7336 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7338 /* Verify we can do the following downcast, and that we have the
7340 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
7341 sig_type
= (struct signatured_type
*) this_cu
;
7342 gdb_assert (sig_type
->dwo_unit
!= NULL
);
7344 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7346 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
7347 /* There's no need to do the rereading_dwo_cu handling that
7348 init_cutu_and_read_dies does since we don't read the stub. */
7352 /* If !use_existing_cu, this_cu->cu must be NULL. */
7353 gdb_assert (this_cu
->cu
== NULL
);
7354 new_cu
.reset (new dwarf2_cu (this_cu
));
7357 /* A future optimization, if needed, would be to use an existing
7358 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
7359 could share abbrev tables. */
7361 /* The abbreviation table used by READER, this must live at least as long as
7363 abbrev_table_up dwo_abbrev_table
;
7365 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
7366 NULL
/* stub_comp_unit_die */,
7367 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
7369 &comp_unit_die
, &has_children
,
7370 &dwo_abbrev_table
) == 0)
7376 /* All the "real" work is done here. */
7377 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7379 /* This duplicates the code in init_cutu_and_read_dies,
7380 but the alternative is making the latter more complex.
7381 This function is only for the special case of using DWO files directly:
7382 no point in overly complicating the general case just to handle this. */
7383 if (new_cu
!= NULL
&& keep
)
7385 /* Link this CU into read_in_chain. */
7386 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7387 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7388 /* The chain owns it now. */
7393 /* Initialize a CU (or TU) and read its DIEs.
7394 If the CU defers to a DWO file, read the DWO file as well.
7396 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
7397 Otherwise the table specified in the comp unit header is read in and used.
7398 This is an optimization for when we already have the abbrev table.
7400 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
7401 Otherwise, a new CU is allocated with xmalloc.
7403 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
7404 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
7406 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7407 linker) then DIE_READER_FUNC will not get called. */
7410 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
7411 struct abbrev_table
*abbrev_table
,
7412 int use_existing_cu
, int keep
,
7413 die_reader_func_ftype
*die_reader_func
,
7416 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7417 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7418 struct dwarf2_section_info
*section
= this_cu
->section
;
7419 bfd
*abfd
= get_section_bfd_owner (section
);
7420 struct dwarf2_cu
*cu
;
7421 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7422 struct die_reader_specs reader
;
7423 struct die_info
*comp_unit_die
;
7425 struct attribute
*attr
;
7426 struct signatured_type
*sig_type
= NULL
;
7427 struct dwarf2_section_info
*abbrev_section
;
7428 /* Non-zero if CU currently points to a DWO file and we need to
7429 reread it. When this happens we need to reread the skeleton die
7430 before we can reread the DWO file (this only applies to CUs, not TUs). */
7431 int rereading_dwo_cu
= 0;
7433 if (dwarf_die_debug
)
7434 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7435 this_cu
->is_debug_types
? "type" : "comp",
7436 sect_offset_str (this_cu
->sect_off
));
7438 if (use_existing_cu
)
7441 /* If we're reading a TU directly from a DWO file, including a virtual DWO
7442 file (instead of going through the stub), short-circuit all of this. */
7443 if (this_cu
->reading_dwo_directly
)
7445 /* Narrow down the scope of possibilities to have to understand. */
7446 gdb_assert (this_cu
->is_debug_types
);
7447 gdb_assert (abbrev_table
== NULL
);
7448 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
7449 die_reader_func
, data
);
7453 /* This is cheap if the section is already read in. */
7454 dwarf2_read_section (objfile
, section
);
7456 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7458 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
7460 std::unique_ptr
<dwarf2_cu
> new_cu
;
7461 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7464 /* If this CU is from a DWO file we need to start over, we need to
7465 refetch the attributes from the skeleton CU.
7466 This could be optimized by retrieving those attributes from when we
7467 were here the first time: the previous comp_unit_die was stored in
7468 comp_unit_obstack. But there's no data yet that we need this
7470 if (cu
->dwo_unit
!= NULL
)
7471 rereading_dwo_cu
= 1;
7475 /* If !use_existing_cu, this_cu->cu must be NULL. */
7476 gdb_assert (this_cu
->cu
== NULL
);
7477 new_cu
.reset (new dwarf2_cu (this_cu
));
7481 /* Get the header. */
7482 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7484 /* We already have the header, there's no need to read it in again. */
7485 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7489 if (this_cu
->is_debug_types
)
7491 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7492 &cu
->header
, section
,
7493 abbrev_section
, info_ptr
,
7496 /* Since per_cu is the first member of struct signatured_type,
7497 we can go from a pointer to one to a pointer to the other. */
7498 sig_type
= (struct signatured_type
*) this_cu
;
7499 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7500 gdb_assert (sig_type
->type_offset_in_tu
7501 == cu
->header
.type_cu_offset_in_tu
);
7502 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7504 /* LENGTH has not been set yet for type units if we're
7505 using .gdb_index. */
7506 this_cu
->length
= get_cu_length (&cu
->header
);
7508 /* Establish the type offset that can be used to lookup the type. */
7509 sig_type
->type_offset_in_section
=
7510 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7512 this_cu
->dwarf_version
= cu
->header
.version
;
7516 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7517 &cu
->header
, section
,
7520 rcuh_kind::COMPILE
);
7522 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7523 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
7524 this_cu
->dwarf_version
= cu
->header
.version
;
7528 /* Skip dummy compilation units. */
7529 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7530 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7533 /* If we don't have them yet, read the abbrevs for this compilation unit.
7534 And if we need to read them now, make sure they're freed when we're
7535 done (own the table through ABBREV_TABLE_HOLDER). */
7536 abbrev_table_up abbrev_table_holder
;
7537 if (abbrev_table
!= NULL
)
7538 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7542 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7543 cu
->header
.abbrev_sect_off
);
7544 abbrev_table
= abbrev_table_holder
.get ();
7547 /* Read the top level CU/TU die. */
7548 init_cu_die_reader (&reader
, cu
, section
, NULL
, abbrev_table
);
7549 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7551 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7552 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7553 table from the DWO file and pass the ownership over to us. It will be
7554 referenced from READER, so we must make sure to free it after we're done
7557 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7558 DWO CU, that this test will fail (the attribute will not be present). */
7559 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7560 abbrev_table_up dwo_abbrev_table
;
7563 struct dwo_unit
*dwo_unit
;
7564 struct die_info
*dwo_comp_unit_die
;
7568 complaint (&symfile_complaints
,
7569 _("compilation unit with DW_AT_GNU_dwo_name"
7570 " has children (offset %s) [in module %s]"),
7571 sect_offset_str (this_cu
->sect_off
),
7572 bfd_get_filename (abfd
));
7574 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
7575 if (dwo_unit
!= NULL
)
7577 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
7578 comp_unit_die
, NULL
,
7580 &dwo_comp_unit_die
, &has_children
,
7581 &dwo_abbrev_table
) == 0)
7586 comp_unit_die
= dwo_comp_unit_die
;
7590 /* Yikes, we couldn't find the rest of the DIE, we only have
7591 the stub. A complaint has already been logged. There's
7592 not much more we can do except pass on the stub DIE to
7593 die_reader_func. We don't want to throw an error on bad
7598 /* All of the above is setup for this call. Yikes. */
7599 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7601 /* Done, clean up. */
7602 if (new_cu
!= NULL
&& keep
)
7604 /* Link this CU into read_in_chain. */
7605 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7606 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7607 /* The chain owns it now. */
7612 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
7613 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
7614 to have already done the lookup to find the DWO file).
7616 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7617 THIS_CU->is_debug_types, but nothing else.
7619 We fill in THIS_CU->length.
7621 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7622 linker) then DIE_READER_FUNC will not get called.
7624 THIS_CU->cu is always freed when done.
7625 This is done in order to not leave THIS_CU->cu in a state where we have
7626 to care whether it refers to the "main" CU or the DWO CU. */
7629 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
7630 struct dwo_file
*dwo_file
,
7631 die_reader_func_ftype
*die_reader_func
,
7634 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7635 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7636 struct dwarf2_section_info
*section
= this_cu
->section
;
7637 bfd
*abfd
= get_section_bfd_owner (section
);
7638 struct dwarf2_section_info
*abbrev_section
;
7639 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7640 struct die_reader_specs reader
;
7641 struct die_info
*comp_unit_die
;
7644 if (dwarf_die_debug
)
7645 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7646 this_cu
->is_debug_types
? "type" : "comp",
7647 sect_offset_str (this_cu
->sect_off
));
7649 gdb_assert (this_cu
->cu
== NULL
);
7651 abbrev_section
= (dwo_file
!= NULL
7652 ? &dwo_file
->sections
.abbrev
7653 : get_abbrev_section_for_cu (this_cu
));
7655 /* This is cheap if the section is already read in. */
7656 dwarf2_read_section (objfile
, section
);
7658 struct dwarf2_cu
cu (this_cu
);
7660 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7661 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7662 &cu
.header
, section
,
7663 abbrev_section
, info_ptr
,
7664 (this_cu
->is_debug_types
7666 : rcuh_kind::COMPILE
));
7668 this_cu
->length
= get_cu_length (&cu
.header
);
7670 /* Skip dummy compilation units. */
7671 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7672 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7675 abbrev_table_up abbrev_table
7676 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7677 cu
.header
.abbrev_sect_off
);
7679 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
, abbrev_table
.get ());
7680 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7682 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7685 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
7686 does not lookup the specified DWO file.
7687 This cannot be used to read DWO files.
7689 THIS_CU->cu is always freed when done.
7690 This is done in order to not leave THIS_CU->cu in a state where we have
7691 to care whether it refers to the "main" CU or the DWO CU.
7692 We can revisit this if the data shows there's a performance issue. */
7695 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
7696 die_reader_func_ftype
*die_reader_func
,
7699 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
7702 /* Type Unit Groups.
7704 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7705 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7706 so that all types coming from the same compilation (.o file) are grouped
7707 together. A future step could be to put the types in the same symtab as
7708 the CU the types ultimately came from. */
7711 hash_type_unit_group (const void *item
)
7713 const struct type_unit_group
*tu_group
7714 = (const struct type_unit_group
*) item
;
7716 return hash_stmt_list_entry (&tu_group
->hash
);
7720 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7722 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7723 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7725 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7728 /* Allocate a hash table for type unit groups. */
7731 allocate_type_unit_groups_table (struct objfile
*objfile
)
7733 return htab_create_alloc_ex (3,
7734 hash_type_unit_group
,
7737 &objfile
->objfile_obstack
,
7738 hashtab_obstack_allocate
,
7739 dummy_obstack_deallocate
);
7742 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7743 partial symtabs. We combine several TUs per psymtab to not let the size
7744 of any one psymtab grow too big. */
7745 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7746 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7748 /* Helper routine for get_type_unit_group.
7749 Create the type_unit_group object used to hold one or more TUs. */
7751 static struct type_unit_group
*
7752 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7754 struct dwarf2_per_objfile
*dwarf2_per_objfile
7755 = cu
->per_cu
->dwarf2_per_objfile
;
7756 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7757 struct dwarf2_per_cu_data
*per_cu
;
7758 struct type_unit_group
*tu_group
;
7760 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7761 struct type_unit_group
);
7762 per_cu
= &tu_group
->per_cu
;
7763 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7765 if (dwarf2_per_objfile
->using_index
)
7767 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7768 struct dwarf2_per_cu_quick_data
);
7772 unsigned int line_offset
= to_underlying (line_offset_struct
);
7773 struct partial_symtab
*pst
;
7776 /* Give the symtab a useful name for debug purposes. */
7777 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7778 name
= xstrprintf ("<type_units_%d>",
7779 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7781 name
= xstrprintf ("<type_units_at_0x%x>", line_offset
);
7783 pst
= create_partial_symtab (per_cu
, name
);
7789 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7790 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7795 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7796 STMT_LIST is a DW_AT_stmt_list attribute. */
7798 static struct type_unit_group
*
7799 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7801 struct dwarf2_per_objfile
*dwarf2_per_objfile
7802 = cu
->per_cu
->dwarf2_per_objfile
;
7803 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7804 struct type_unit_group
*tu_group
;
7806 unsigned int line_offset
;
7807 struct type_unit_group type_unit_group_for_lookup
;
7809 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7811 dwarf2_per_objfile
->type_unit_groups
=
7812 allocate_type_unit_groups_table (dwarf2_per_objfile
->objfile
);
7815 /* Do we need to create a new group, or can we use an existing one? */
7819 line_offset
= DW_UNSND (stmt_list
);
7820 ++tu_stats
->nr_symtab_sharers
;
7824 /* Ugh, no stmt_list. Rare, but we have to handle it.
7825 We can do various things here like create one group per TU or
7826 spread them over multiple groups to split up the expansion work.
7827 To avoid worst case scenarios (too many groups or too large groups)
7828 we, umm, group them in bunches. */
7829 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7830 | (tu_stats
->nr_stmt_less_type_units
7831 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7832 ++tu_stats
->nr_stmt_less_type_units
;
7835 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7836 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7837 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
7838 &type_unit_group_for_lookup
, INSERT
);
7841 tu_group
= (struct type_unit_group
*) *slot
;
7842 gdb_assert (tu_group
!= NULL
);
7846 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7847 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7849 ++tu_stats
->nr_symtabs
;
7855 /* Partial symbol tables. */
7857 /* Create a psymtab named NAME and assign it to PER_CU.
7859 The caller must fill in the following details:
7860 dirname, textlow, texthigh. */
7862 static struct partial_symtab
*
7863 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7865 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7866 struct partial_symtab
*pst
;
7868 pst
= start_psymtab_common (objfile
, name
, 0,
7869 objfile
->global_psymbols
,
7870 objfile
->static_psymbols
);
7872 pst
->psymtabs_addrmap_supported
= 1;
7874 /* This is the glue that links PST into GDB's symbol API. */
7875 pst
->read_symtab_private
= per_cu
;
7876 pst
->read_symtab
= dwarf2_read_symtab
;
7877 per_cu
->v
.psymtab
= pst
;
7882 /* The DATA object passed to process_psymtab_comp_unit_reader has this
7885 struct process_psymtab_comp_unit_data
7887 /* True if we are reading a DW_TAG_partial_unit. */
7889 int want_partial_unit
;
7891 /* The "pretend" language that is used if the CU doesn't declare a
7894 enum language pretend_language
;
7897 /* die_reader_func for process_psymtab_comp_unit. */
7900 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7901 const gdb_byte
*info_ptr
,
7902 struct die_info
*comp_unit_die
,
7906 struct dwarf2_cu
*cu
= reader
->cu
;
7907 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7908 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7909 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7911 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7912 struct partial_symtab
*pst
;
7913 enum pc_bounds_kind cu_bounds_kind
;
7914 const char *filename
;
7915 struct process_psymtab_comp_unit_data
*info
7916 = (struct process_psymtab_comp_unit_data
*) data
;
7918 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
7921 gdb_assert (! per_cu
->is_debug_types
);
7923 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
7925 cu
->list_in_scope
= &file_symbols
;
7927 /* Allocate a new partial symbol table structure. */
7928 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
7929 if (filename
== NULL
)
7932 pst
= create_partial_symtab (per_cu
, filename
);
7934 /* This must be done before calling dwarf2_build_include_psymtabs. */
7935 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7937 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
7939 dwarf2_find_base_address (comp_unit_die
, cu
);
7941 /* Possibly set the default values of LOWPC and HIGHPC from
7943 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
7944 &best_highpc
, cu
, pst
);
7945 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
7946 /* Store the contiguous range if it is not empty; it can be empty for
7947 CUs with no code. */
7948 addrmap_set_empty (objfile
->psymtabs_addrmap
,
7949 gdbarch_adjust_dwarf2_addr (gdbarch
,
7950 best_lowpc
+ baseaddr
),
7951 gdbarch_adjust_dwarf2_addr (gdbarch
,
7952 best_highpc
+ baseaddr
) - 1,
7955 /* Check if comp unit has_children.
7956 If so, read the rest of the partial symbols from this comp unit.
7957 If not, there's no more debug_info for this comp unit. */
7960 struct partial_die_info
*first_die
;
7961 CORE_ADDR lowpc
, highpc
;
7963 lowpc
= ((CORE_ADDR
) -1);
7964 highpc
= ((CORE_ADDR
) 0);
7966 first_die
= load_partial_dies (reader
, info_ptr
, 1);
7968 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
7969 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
7971 /* If we didn't find a lowpc, set it to highpc to avoid
7972 complaints from `maint check'. */
7973 if (lowpc
== ((CORE_ADDR
) -1))
7976 /* If the compilation unit didn't have an explicit address range,
7977 then use the information extracted from its child dies. */
7978 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
7981 best_highpc
= highpc
;
7984 pst
->textlow
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
);
7985 pst
->texthigh
= gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
);
7987 end_psymtab_common (objfile
, pst
);
7989 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
7992 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
7993 struct dwarf2_per_cu_data
*iter
;
7995 /* Fill in 'dependencies' here; we fill in 'users' in a
7997 pst
->number_of_dependencies
= len
;
7999 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
8001 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8004 pst
->dependencies
[i
] = iter
->v
.psymtab
;
8006 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
8009 /* Get the list of files included in the current compilation unit,
8010 and build a psymtab for each of them. */
8011 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
8013 if (dwarf_read_debug
)
8015 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8017 fprintf_unfiltered (gdb_stdlog
,
8018 "Psymtab for %s unit @%s: %s - %s"
8019 ", %d global, %d static syms\n",
8020 per_cu
->is_debug_types
? "type" : "comp",
8021 sect_offset_str (per_cu
->sect_off
),
8022 paddress (gdbarch
, pst
->textlow
),
8023 paddress (gdbarch
, pst
->texthigh
),
8024 pst
->n_global_syms
, pst
->n_static_syms
);
8028 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8029 Process compilation unit THIS_CU for a psymtab. */
8032 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8033 int want_partial_unit
,
8034 enum language pretend_language
)
8036 /* If this compilation unit was already read in, free the
8037 cached copy in order to read it in again. This is
8038 necessary because we skipped some symbols when we first
8039 read in the compilation unit (see load_partial_dies).
8040 This problem could be avoided, but the benefit is unclear. */
8041 if (this_cu
->cu
!= NULL
)
8042 free_one_cached_comp_unit (this_cu
);
8044 if (this_cu
->is_debug_types
)
8045 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, build_type_psymtabs_reader
,
8049 process_psymtab_comp_unit_data info
;
8050 info
.want_partial_unit
= want_partial_unit
;
8051 info
.pretend_language
= pretend_language
;
8052 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0,
8053 process_psymtab_comp_unit_reader
, &info
);
8056 /* Age out any secondary CUs. */
8057 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
8060 /* Reader function for build_type_psymtabs. */
8063 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
8064 const gdb_byte
*info_ptr
,
8065 struct die_info
*type_unit_die
,
8069 struct dwarf2_per_objfile
*dwarf2_per_objfile
8070 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
8071 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8072 struct dwarf2_cu
*cu
= reader
->cu
;
8073 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8074 struct signatured_type
*sig_type
;
8075 struct type_unit_group
*tu_group
;
8076 struct attribute
*attr
;
8077 struct partial_die_info
*first_die
;
8078 CORE_ADDR lowpc
, highpc
;
8079 struct partial_symtab
*pst
;
8081 gdb_assert (data
== NULL
);
8082 gdb_assert (per_cu
->is_debug_types
);
8083 sig_type
= (struct signatured_type
*) per_cu
;
8088 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
8089 tu_group
= get_type_unit_group (cu
, attr
);
8091 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
8093 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
8094 cu
->list_in_scope
= &file_symbols
;
8095 pst
= create_partial_symtab (per_cu
, "");
8098 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8100 lowpc
= (CORE_ADDR
) -1;
8101 highpc
= (CORE_ADDR
) 0;
8102 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
8104 end_psymtab_common (objfile
, pst
);
8107 /* Struct used to sort TUs by their abbreviation table offset. */
8109 struct tu_abbrev_offset
8111 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
8112 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
8115 signatured_type
*sig_type
;
8116 sect_offset abbrev_offset
;
8119 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
8122 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
8123 const struct tu_abbrev_offset
&b
)
8125 return a
.abbrev_offset
< b
.abbrev_offset
;
8128 /* Efficiently read all the type units.
8129 This does the bulk of the work for build_type_psymtabs.
8131 The efficiency is because we sort TUs by the abbrev table they use and
8132 only read each abbrev table once. In one program there are 200K TUs
8133 sharing 8K abbrev tables.
8135 The main purpose of this function is to support building the
8136 dwarf2_per_objfile->type_unit_groups table.
8137 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
8138 can collapse the search space by grouping them by stmt_list.
8139 The savings can be significant, in the same program from above the 200K TUs
8140 share 8K stmt_list tables.
8142 FUNC is expected to call get_type_unit_group, which will create the
8143 struct type_unit_group if necessary and add it to
8144 dwarf2_per_objfile->type_unit_groups. */
8147 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8149 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8150 abbrev_table_up abbrev_table
;
8151 sect_offset abbrev_offset
;
8153 /* It's up to the caller to not call us multiple times. */
8154 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
8156 if (dwarf2_per_objfile
->all_type_units
.empty ())
8159 /* TUs typically share abbrev tables, and there can be way more TUs than
8160 abbrev tables. Sort by abbrev table to reduce the number of times we
8161 read each abbrev table in.
8162 Alternatives are to punt or to maintain a cache of abbrev tables.
8163 This is simpler and efficient enough for now.
8165 Later we group TUs by their DW_AT_stmt_list value (as this defines the
8166 symtab to use). Typically TUs with the same abbrev offset have the same
8167 stmt_list value too so in practice this should work well.
8169 The basic algorithm here is:
8171 sort TUs by abbrev table
8172 for each TU with same abbrev table:
8173 read abbrev table if first user
8174 read TU top level DIE
8175 [IWBN if DWO skeletons had DW_AT_stmt_list]
8178 if (dwarf_read_debug
)
8179 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
8181 /* Sort in a separate table to maintain the order of all_type_units
8182 for .gdb_index: TU indices directly index all_type_units. */
8183 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
8184 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->all_type_units
.size ());
8186 for (signatured_type
*sig_type
: dwarf2_per_objfile
->all_type_units
)
8187 sorted_by_abbrev
.emplace_back
8188 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
8189 sig_type
->per_cu
.section
,
8190 sig_type
->per_cu
.sect_off
));
8192 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
8193 sort_tu_by_abbrev_offset
);
8195 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
8197 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
8199 /* Switch to the next abbrev table if necessary. */
8200 if (abbrev_table
== NULL
8201 || tu
.abbrev_offset
!= abbrev_offset
)
8203 abbrev_offset
= tu
.abbrev_offset
;
8205 abbrev_table_read_table (dwarf2_per_objfile
,
8206 &dwarf2_per_objfile
->abbrev
,
8208 ++tu_stats
->nr_uniq_abbrev_tables
;
8211 init_cutu_and_read_dies (&tu
.sig_type
->per_cu
, abbrev_table
.get (),
8212 0, 0, build_type_psymtabs_reader
, NULL
);
8216 /* Print collected type unit statistics. */
8219 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8221 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8223 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
8224 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
8225 dwarf2_per_objfile
->all_type_units
.size ());
8226 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
8227 tu_stats
->nr_uniq_abbrev_tables
);
8228 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
8229 tu_stats
->nr_symtabs
);
8230 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
8231 tu_stats
->nr_symtab_sharers
);
8232 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
8233 tu_stats
->nr_stmt_less_type_units
);
8234 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
8235 tu_stats
->nr_all_type_units_reallocs
);
8238 /* Traversal function for build_type_psymtabs. */
8241 build_type_psymtab_dependencies (void **slot
, void *info
)
8243 struct dwarf2_per_objfile
*dwarf2_per_objfile
8244 = (struct dwarf2_per_objfile
*) info
;
8245 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8246 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
8247 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
8248 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8249 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
8250 struct signatured_type
*iter
;
8253 gdb_assert (len
> 0);
8254 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
8256 pst
->number_of_dependencies
= len
;
8258 XOBNEWVEC (&objfile
->objfile_obstack
, struct partial_symtab
*, len
);
8260 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
8263 gdb_assert (iter
->per_cu
.is_debug_types
);
8264 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
8265 iter
->type_unit_group
= tu_group
;
8268 VEC_free (sig_type_ptr
, tu_group
->tus
);
8273 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8274 Build partial symbol tables for the .debug_types comp-units. */
8277 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8279 if (! create_all_type_units (dwarf2_per_objfile
))
8282 build_type_psymtabs_1 (dwarf2_per_objfile
);
8285 /* Traversal function for process_skeletonless_type_unit.
8286 Read a TU in a DWO file and build partial symbols for it. */
8289 process_skeletonless_type_unit (void **slot
, void *info
)
8291 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
8292 struct dwarf2_per_objfile
*dwarf2_per_objfile
8293 = (struct dwarf2_per_objfile
*) info
;
8294 struct signatured_type find_entry
, *entry
;
8296 /* If this TU doesn't exist in the global table, add it and read it in. */
8298 if (dwarf2_per_objfile
->signatured_types
== NULL
)
8300 dwarf2_per_objfile
->signatured_types
8301 = allocate_signatured_type_table (dwarf2_per_objfile
->objfile
);
8304 find_entry
.signature
= dwo_unit
->signature
;
8305 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
8307 /* If we've already seen this type there's nothing to do. What's happening
8308 is we're doing our own version of comdat-folding here. */
8312 /* This does the job that create_all_type_units would have done for
8314 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
8315 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
8318 /* This does the job that build_type_psymtabs_1 would have done. */
8319 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0,
8320 build_type_psymtabs_reader
, NULL
);
8325 /* Traversal function for process_skeletonless_type_units. */
8328 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
8330 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
8332 if (dwo_file
->tus
!= NULL
)
8334 htab_traverse_noresize (dwo_file
->tus
,
8335 process_skeletonless_type_unit
, info
);
8341 /* Scan all TUs of DWO files, verifying we've processed them.
8342 This is needed in case a TU was emitted without its skeleton.
8343 Note: This can't be done until we know what all the DWO files are. */
8346 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8348 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
8349 if (get_dwp_file (dwarf2_per_objfile
) == NULL
8350 && dwarf2_per_objfile
->dwo_files
!= NULL
)
8352 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
8353 process_dwo_file_for_skeletonless_type_units
,
8354 dwarf2_per_objfile
);
8358 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
8361 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8363 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8365 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8370 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
8372 /* Set the 'user' field only if it is not already set. */
8373 if (pst
->dependencies
[j
]->user
== NULL
)
8374 pst
->dependencies
[j
]->user
= pst
;
8379 /* Build the partial symbol table by doing a quick pass through the
8380 .debug_info and .debug_abbrev sections. */
8383 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8385 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8387 if (dwarf_read_debug
)
8389 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
8390 objfile_name (objfile
));
8393 dwarf2_per_objfile
->reading_partial_symbols
= 1;
8395 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
8397 /* Any cached compilation units will be linked by the per-objfile
8398 read_in_chain. Make sure to free them when we're done. */
8399 free_cached_comp_units
freer (dwarf2_per_objfile
);
8401 build_type_psymtabs (dwarf2_per_objfile
);
8403 create_all_comp_units (dwarf2_per_objfile
);
8405 /* Create a temporary address map on a temporary obstack. We later
8406 copy this to the final obstack. */
8407 auto_obstack temp_obstack
;
8409 scoped_restore save_psymtabs_addrmap
8410 = make_scoped_restore (&objfile
->psymtabs_addrmap
,
8411 addrmap_create_mutable (&temp_obstack
));
8413 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8414 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
8416 /* This has to wait until we read the CUs, we need the list of DWOs. */
8417 process_skeletonless_type_units (dwarf2_per_objfile
);
8419 /* Now that all TUs have been processed we can fill in the dependencies. */
8420 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
8422 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
8423 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
8426 if (dwarf_read_debug
)
8427 print_tu_stats (dwarf2_per_objfile
);
8429 set_partial_user (dwarf2_per_objfile
);
8431 objfile
->psymtabs_addrmap
= addrmap_create_fixed (objfile
->psymtabs_addrmap
,
8432 &objfile
->objfile_obstack
);
8433 /* At this point we want to keep the address map. */
8434 save_psymtabs_addrmap
.release ();
8436 if (dwarf_read_debug
)
8437 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
8438 objfile_name (objfile
));
8441 /* die_reader_func for load_partial_comp_unit. */
8444 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
8445 const gdb_byte
*info_ptr
,
8446 struct die_info
*comp_unit_die
,
8450 struct dwarf2_cu
*cu
= reader
->cu
;
8452 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
8454 /* Check if comp unit has_children.
8455 If so, read the rest of the partial symbols from this comp unit.
8456 If not, there's no more debug_info for this comp unit. */
8458 load_partial_dies (reader
, info_ptr
, 0);
8461 /* Load the partial DIEs for a secondary CU into memory.
8462 This is also used when rereading a primary CU with load_all_dies. */
8465 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
8467 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
8468 load_partial_comp_unit_reader
, NULL
);
8472 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
8473 struct dwarf2_section_info
*section
,
8474 struct dwarf2_section_info
*abbrev_section
,
8475 unsigned int is_dwz
)
8477 const gdb_byte
*info_ptr
;
8478 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8480 if (dwarf_read_debug
)
8481 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
8482 get_section_name (section
),
8483 get_section_file_name (section
));
8485 dwarf2_read_section (objfile
, section
);
8487 info_ptr
= section
->buffer
;
8489 while (info_ptr
< section
->buffer
+ section
->size
)
8491 struct dwarf2_per_cu_data
*this_cu
;
8493 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
8495 comp_unit_head cu_header
;
8496 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
8497 abbrev_section
, info_ptr
,
8498 rcuh_kind::COMPILE
);
8500 /* Save the compilation unit for later lookup. */
8501 if (cu_header
.unit_type
!= DW_UT_type
)
8503 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
8504 struct dwarf2_per_cu_data
);
8505 memset (this_cu
, 0, sizeof (*this_cu
));
8509 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
8510 struct signatured_type
);
8511 memset (sig_type
, 0, sizeof (*sig_type
));
8512 sig_type
->signature
= cu_header
.signature
;
8513 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
8514 this_cu
= &sig_type
->per_cu
;
8516 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
8517 this_cu
->sect_off
= sect_off
;
8518 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
8519 this_cu
->is_dwz
= is_dwz
;
8520 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
8521 this_cu
->section
= section
;
8523 dwarf2_per_objfile
->all_comp_units
.push_back (this_cu
);
8525 info_ptr
= info_ptr
+ this_cu
->length
;
8529 /* Create a list of all compilation units in OBJFILE.
8530 This is only done for -readnow and building partial symtabs. */
8533 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8535 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
8536 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
8537 &dwarf2_per_objfile
->abbrev
, 0);
8539 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
8541 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
8545 /* Process all loaded DIEs for compilation unit CU, starting at
8546 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8547 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8548 DW_AT_ranges). See the comments of add_partial_subprogram on how
8549 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8552 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8553 CORE_ADDR
*highpc
, int set_addrmap
,
8554 struct dwarf2_cu
*cu
)
8556 struct partial_die_info
*pdi
;
8558 /* Now, march along the PDI's, descending into ones which have
8559 interesting children but skipping the children of the other ones,
8560 until we reach the end of the compilation unit. */
8568 /* Anonymous namespaces or modules have no name but have interesting
8569 children, so we need to look at them. Ditto for anonymous
8572 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8573 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8574 || pdi
->tag
== DW_TAG_imported_unit
8575 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8579 case DW_TAG_subprogram
:
8580 case DW_TAG_inlined_subroutine
:
8581 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8583 case DW_TAG_constant
:
8584 case DW_TAG_variable
:
8585 case DW_TAG_typedef
:
8586 case DW_TAG_union_type
:
8587 if (!pdi
->is_declaration
)
8589 add_partial_symbol (pdi
, cu
);
8592 case DW_TAG_class_type
:
8593 case DW_TAG_interface_type
:
8594 case DW_TAG_structure_type
:
8595 if (!pdi
->is_declaration
)
8597 add_partial_symbol (pdi
, cu
);
8599 if ((cu
->language
== language_rust
8600 || cu
->language
== language_cplus
) && pdi
->has_children
)
8601 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8604 case DW_TAG_enumeration_type
:
8605 if (!pdi
->is_declaration
)
8606 add_partial_enumeration (pdi
, cu
);
8608 case DW_TAG_base_type
:
8609 case DW_TAG_subrange_type
:
8610 /* File scope base type definitions are added to the partial
8612 add_partial_symbol (pdi
, cu
);
8614 case DW_TAG_namespace
:
8615 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8618 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8620 case DW_TAG_imported_unit
:
8622 struct dwarf2_per_cu_data
*per_cu
;
8624 /* For now we don't handle imported units in type units. */
8625 if (cu
->per_cu
->is_debug_types
)
8627 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8628 " supported in type units [in module %s]"),
8629 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8632 per_cu
= dwarf2_find_containing_comp_unit
8633 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8634 cu
->per_cu
->dwarf2_per_objfile
);
8636 /* Go read the partial unit, if needed. */
8637 if (per_cu
->v
.psymtab
== NULL
)
8638 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
8640 VEC_safe_push (dwarf2_per_cu_ptr
,
8641 cu
->per_cu
->imported_symtabs
, per_cu
);
8644 case DW_TAG_imported_declaration
:
8645 add_partial_symbol (pdi
, cu
);
8652 /* If the die has a sibling, skip to the sibling. */
8654 pdi
= pdi
->die_sibling
;
8658 /* Functions used to compute the fully scoped name of a partial DIE.
8660 Normally, this is simple. For C++, the parent DIE's fully scoped
8661 name is concatenated with "::" and the partial DIE's name.
8662 Enumerators are an exception; they use the scope of their parent
8663 enumeration type, i.e. the name of the enumeration type is not
8664 prepended to the enumerator.
8666 There are two complexities. One is DW_AT_specification; in this
8667 case "parent" means the parent of the target of the specification,
8668 instead of the direct parent of the DIE. The other is compilers
8669 which do not emit DW_TAG_namespace; in this case we try to guess
8670 the fully qualified name of structure types from their members'
8671 linkage names. This must be done using the DIE's children rather
8672 than the children of any DW_AT_specification target. We only need
8673 to do this for structures at the top level, i.e. if the target of
8674 any DW_AT_specification (if any; otherwise the DIE itself) does not
8677 /* Compute the scope prefix associated with PDI's parent, in
8678 compilation unit CU. The result will be allocated on CU's
8679 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8680 field. NULL is returned if no prefix is necessary. */
8682 partial_die_parent_scope (struct partial_die_info
*pdi
,
8683 struct dwarf2_cu
*cu
)
8685 const char *grandparent_scope
;
8686 struct partial_die_info
*parent
, *real_pdi
;
8688 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8689 then this means the parent of the specification DIE. */
8692 while (real_pdi
->has_specification
)
8693 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
8694 real_pdi
->spec_is_dwz
, cu
);
8696 parent
= real_pdi
->die_parent
;
8700 if (parent
->scope_set
)
8701 return parent
->scope
;
8705 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8707 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8708 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8709 Work around this problem here. */
8710 if (cu
->language
== language_cplus
8711 && parent
->tag
== DW_TAG_namespace
8712 && strcmp (parent
->name
, "::") == 0
8713 && grandparent_scope
== NULL
)
8715 parent
->scope
= NULL
;
8716 parent
->scope_set
= 1;
8720 if (pdi
->tag
== DW_TAG_enumerator
)
8721 /* Enumerators should not get the name of the enumeration as a prefix. */
8722 parent
->scope
= grandparent_scope
;
8723 else if (parent
->tag
== DW_TAG_namespace
8724 || parent
->tag
== DW_TAG_module
8725 || parent
->tag
== DW_TAG_structure_type
8726 || parent
->tag
== DW_TAG_class_type
8727 || parent
->tag
== DW_TAG_interface_type
8728 || parent
->tag
== DW_TAG_union_type
8729 || parent
->tag
== DW_TAG_enumeration_type
)
8731 if (grandparent_scope
== NULL
)
8732 parent
->scope
= parent
->name
;
8734 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8736 parent
->name
, 0, cu
);
8740 /* FIXME drow/2004-04-01: What should we be doing with
8741 function-local names? For partial symbols, we should probably be
8743 complaint (&symfile_complaints
,
8744 _("unhandled containing DIE tag %d for DIE at %s"),
8745 parent
->tag
, sect_offset_str (pdi
->sect_off
));
8746 parent
->scope
= grandparent_scope
;
8749 parent
->scope_set
= 1;
8750 return parent
->scope
;
8753 /* Return the fully scoped name associated with PDI, from compilation unit
8754 CU. The result will be allocated with malloc. */
8757 partial_die_full_name (struct partial_die_info
*pdi
,
8758 struct dwarf2_cu
*cu
)
8760 const char *parent_scope
;
8762 /* If this is a template instantiation, we can not work out the
8763 template arguments from partial DIEs. So, unfortunately, we have
8764 to go through the full DIEs. At least any work we do building
8765 types here will be reused if full symbols are loaded later. */
8766 if (pdi
->has_template_arguments
)
8770 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8772 struct die_info
*die
;
8773 struct attribute attr
;
8774 struct dwarf2_cu
*ref_cu
= cu
;
8776 /* DW_FORM_ref_addr is using section offset. */
8777 attr
.name
= (enum dwarf_attribute
) 0;
8778 attr
.form
= DW_FORM_ref_addr
;
8779 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8780 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8782 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8786 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8787 if (parent_scope
== NULL
)
8790 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
8794 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8796 struct dwarf2_per_objfile
*dwarf2_per_objfile
8797 = cu
->per_cu
->dwarf2_per_objfile
;
8798 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8799 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8801 const char *actual_name
= NULL
;
8803 char *built_actual_name
;
8805 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8807 built_actual_name
= partial_die_full_name (pdi
, cu
);
8808 if (built_actual_name
!= NULL
)
8809 actual_name
= built_actual_name
;
8811 if (actual_name
== NULL
)
8812 actual_name
= pdi
->name
;
8816 case DW_TAG_inlined_subroutine
:
8817 case DW_TAG_subprogram
:
8818 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
);
8819 if (pdi
->is_external
|| cu
->language
== language_ada
)
8821 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
8822 of the global scope. But in Ada, we want to be able to access
8823 nested procedures globally. So all Ada subprograms are stored
8824 in the global scope. */
8825 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8826 built_actual_name
!= NULL
,
8827 VAR_DOMAIN
, LOC_BLOCK
,
8828 &objfile
->global_psymbols
,
8829 addr
, cu
->language
, objfile
);
8833 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8834 built_actual_name
!= NULL
,
8835 VAR_DOMAIN
, LOC_BLOCK
,
8836 &objfile
->static_psymbols
,
8837 addr
, cu
->language
, objfile
);
8840 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8841 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8843 case DW_TAG_constant
:
8845 std::vector
<partial_symbol
*> *list
;
8847 if (pdi
->is_external
)
8848 list
= &objfile
->global_psymbols
;
8850 list
= &objfile
->static_psymbols
;
8851 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8852 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
8853 list
, 0, cu
->language
, objfile
);
8856 case DW_TAG_variable
:
8858 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8862 && !dwarf2_per_objfile
->has_section_at_zero
)
8864 /* A global or static variable may also have been stripped
8865 out by the linker if unused, in which case its address
8866 will be nullified; do not add such variables into partial
8867 symbol table then. */
8869 else if (pdi
->is_external
)
8872 Don't enter into the minimal symbol tables as there is
8873 a minimal symbol table entry from the ELF symbols already.
8874 Enter into partial symbol table if it has a location
8875 descriptor or a type.
8876 If the location descriptor is missing, new_symbol will create
8877 a LOC_UNRESOLVED symbol, the address of the variable will then
8878 be determined from the minimal symbol table whenever the variable
8880 The address for the partial symbol table entry is not
8881 used by GDB, but it comes in handy for debugging partial symbol
8884 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8885 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8886 built_actual_name
!= NULL
,
8887 VAR_DOMAIN
, LOC_STATIC
,
8888 &objfile
->global_psymbols
,
8890 cu
->language
, objfile
);
8894 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8896 /* Static Variable. Skip symbols whose value we cannot know (those
8897 without location descriptors or constant values). */
8898 if (!has_loc
&& !pdi
->has_const_value
)
8900 xfree (built_actual_name
);
8904 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8905 built_actual_name
!= NULL
,
8906 VAR_DOMAIN
, LOC_STATIC
,
8907 &objfile
->static_psymbols
,
8908 has_loc
? addr
+ baseaddr
: (CORE_ADDR
) 0,
8909 cu
->language
, objfile
);
8912 case DW_TAG_typedef
:
8913 case DW_TAG_base_type
:
8914 case DW_TAG_subrange_type
:
8915 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8916 built_actual_name
!= NULL
,
8917 VAR_DOMAIN
, LOC_TYPEDEF
,
8918 &objfile
->static_psymbols
,
8919 0, cu
->language
, objfile
);
8921 case DW_TAG_imported_declaration
:
8922 case DW_TAG_namespace
:
8923 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8924 built_actual_name
!= NULL
,
8925 VAR_DOMAIN
, LOC_TYPEDEF
,
8926 &objfile
->global_psymbols
,
8927 0, cu
->language
, objfile
);
8930 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8931 built_actual_name
!= NULL
,
8932 MODULE_DOMAIN
, LOC_TYPEDEF
,
8933 &objfile
->global_psymbols
,
8934 0, cu
->language
, objfile
);
8936 case DW_TAG_class_type
:
8937 case DW_TAG_interface_type
:
8938 case DW_TAG_structure_type
:
8939 case DW_TAG_union_type
:
8940 case DW_TAG_enumeration_type
:
8941 /* Skip external references. The DWARF standard says in the section
8942 about "Structure, Union, and Class Type Entries": "An incomplete
8943 structure, union or class type is represented by a structure,
8944 union or class entry that does not have a byte size attribute
8945 and that has a DW_AT_declaration attribute." */
8946 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
8948 xfree (built_actual_name
);
8952 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
8953 static vs. global. */
8954 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8955 built_actual_name
!= NULL
,
8956 STRUCT_DOMAIN
, LOC_TYPEDEF
,
8957 cu
->language
== language_cplus
8958 ? &objfile
->global_psymbols
8959 : &objfile
->static_psymbols
,
8960 0, cu
->language
, objfile
);
8963 case DW_TAG_enumerator
:
8964 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8965 built_actual_name
!= NULL
,
8966 VAR_DOMAIN
, LOC_CONST
,
8967 cu
->language
== language_cplus
8968 ? &objfile
->global_psymbols
8969 : &objfile
->static_psymbols
,
8970 0, cu
->language
, objfile
);
8976 xfree (built_actual_name
);
8979 /* Read a partial die corresponding to a namespace; also, add a symbol
8980 corresponding to that namespace to the symbol table. NAMESPACE is
8981 the name of the enclosing namespace. */
8984 add_partial_namespace (struct partial_die_info
*pdi
,
8985 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
8986 int set_addrmap
, struct dwarf2_cu
*cu
)
8988 /* Add a symbol for the namespace. */
8990 add_partial_symbol (pdi
, cu
);
8992 /* Now scan partial symbols in that namespace. */
8994 if (pdi
->has_children
)
8995 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
8998 /* Read a partial die corresponding to a Fortran module. */
9001 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
9002 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
9004 /* Add a symbol for the namespace. */
9006 add_partial_symbol (pdi
, cu
);
9008 /* Now scan partial symbols in that module. */
9010 if (pdi
->has_children
)
9011 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9014 /* Read a partial die corresponding to a subprogram or an inlined
9015 subprogram and create a partial symbol for that subprogram.
9016 When the CU language allows it, this routine also defines a partial
9017 symbol for each nested subprogram that this subprogram contains.
9018 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
9019 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
9021 PDI may also be a lexical block, in which case we simply search
9022 recursively for subprograms defined inside that lexical block.
9023 Again, this is only performed when the CU language allows this
9024 type of definitions. */
9027 add_partial_subprogram (struct partial_die_info
*pdi
,
9028 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9029 int set_addrmap
, struct dwarf2_cu
*cu
)
9031 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
9033 if (pdi
->has_pc_info
)
9035 if (pdi
->lowpc
< *lowpc
)
9036 *lowpc
= pdi
->lowpc
;
9037 if (pdi
->highpc
> *highpc
)
9038 *highpc
= pdi
->highpc
;
9041 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9042 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9047 baseaddr
= ANOFFSET (objfile
->section_offsets
,
9048 SECT_OFF_TEXT (objfile
));
9049 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
9050 pdi
->lowpc
+ baseaddr
);
9051 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
9052 pdi
->highpc
+ baseaddr
);
9053 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
9054 cu
->per_cu
->v
.psymtab
);
9058 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
9060 if (!pdi
->is_declaration
)
9061 /* Ignore subprogram DIEs that do not have a name, they are
9062 illegal. Do not emit a complaint at this point, we will
9063 do so when we convert this psymtab into a symtab. */
9065 add_partial_symbol (pdi
, cu
);
9069 if (! pdi
->has_children
)
9072 if (cu
->language
== language_ada
)
9074 pdi
= pdi
->die_child
;
9078 if (pdi
->tag
== DW_TAG_subprogram
9079 || pdi
->tag
== DW_TAG_inlined_subroutine
9080 || pdi
->tag
== DW_TAG_lexical_block
)
9081 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
9082 pdi
= pdi
->die_sibling
;
9087 /* Read a partial die corresponding to an enumeration type. */
9090 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
9091 struct dwarf2_cu
*cu
)
9093 struct partial_die_info
*pdi
;
9095 if (enum_pdi
->name
!= NULL
)
9096 add_partial_symbol (enum_pdi
, cu
);
9098 pdi
= enum_pdi
->die_child
;
9101 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
9102 complaint (&symfile_complaints
, _("malformed enumerator DIE ignored"));
9104 add_partial_symbol (pdi
, cu
);
9105 pdi
= pdi
->die_sibling
;
9109 /* Return the initial uleb128 in the die at INFO_PTR. */
9112 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
9114 unsigned int bytes_read
;
9116 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9119 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
9120 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
9122 Return the corresponding abbrev, or NULL if the number is zero (indicating
9123 an empty DIE). In either case *BYTES_READ will be set to the length of
9124 the initial number. */
9126 static struct abbrev_info
*
9127 peek_die_abbrev (const die_reader_specs
&reader
,
9128 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
9130 dwarf2_cu
*cu
= reader
.cu
;
9131 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
9132 unsigned int abbrev_number
9133 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
9135 if (abbrev_number
== 0)
9138 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
9141 error (_("Dwarf Error: Could not find abbrev number %d in %s"
9142 " at offset %s [in module %s]"),
9143 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
9144 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
9150 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9151 Returns a pointer to the end of a series of DIEs, terminated by an empty
9152 DIE. Any children of the skipped DIEs will also be skipped. */
9154 static const gdb_byte
*
9155 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
9159 unsigned int bytes_read
;
9160 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
9163 return info_ptr
+ bytes_read
;
9165 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
9169 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9170 INFO_PTR should point just after the initial uleb128 of a DIE, and the
9171 abbrev corresponding to that skipped uleb128 should be passed in
9172 ABBREV. Returns a pointer to this DIE's sibling, skipping any
9175 static const gdb_byte
*
9176 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
9177 struct abbrev_info
*abbrev
)
9179 unsigned int bytes_read
;
9180 struct attribute attr
;
9181 bfd
*abfd
= reader
->abfd
;
9182 struct dwarf2_cu
*cu
= reader
->cu
;
9183 const gdb_byte
*buffer
= reader
->buffer
;
9184 const gdb_byte
*buffer_end
= reader
->buffer_end
;
9185 unsigned int form
, i
;
9187 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
9189 /* The only abbrev we care about is DW_AT_sibling. */
9190 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
9192 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
9193 if (attr
.form
== DW_FORM_ref_addr
)
9194 complaint (&symfile_complaints
,
9195 _("ignoring absolute DW_AT_sibling"));
9198 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
9199 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
9201 if (sibling_ptr
< info_ptr
)
9202 complaint (&symfile_complaints
,
9203 _("DW_AT_sibling points backwards"));
9204 else if (sibling_ptr
> reader
->buffer_end
)
9205 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
9211 /* If it isn't DW_AT_sibling, skip this attribute. */
9212 form
= abbrev
->attrs
[i
].form
;
9216 case DW_FORM_ref_addr
:
9217 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
9218 and later it is offset sized. */
9219 if (cu
->header
.version
== 2)
9220 info_ptr
+= cu
->header
.addr_size
;
9222 info_ptr
+= cu
->header
.offset_size
;
9224 case DW_FORM_GNU_ref_alt
:
9225 info_ptr
+= cu
->header
.offset_size
;
9228 info_ptr
+= cu
->header
.addr_size
;
9235 case DW_FORM_flag_present
:
9236 case DW_FORM_implicit_const
:
9248 case DW_FORM_ref_sig8
:
9251 case DW_FORM_data16
:
9254 case DW_FORM_string
:
9255 read_direct_string (abfd
, info_ptr
, &bytes_read
);
9256 info_ptr
+= bytes_read
;
9258 case DW_FORM_sec_offset
:
9260 case DW_FORM_GNU_strp_alt
:
9261 info_ptr
+= cu
->header
.offset_size
;
9263 case DW_FORM_exprloc
:
9265 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9266 info_ptr
+= bytes_read
;
9268 case DW_FORM_block1
:
9269 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
9271 case DW_FORM_block2
:
9272 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
9274 case DW_FORM_block4
:
9275 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
9279 case DW_FORM_ref_udata
:
9280 case DW_FORM_GNU_addr_index
:
9281 case DW_FORM_GNU_str_index
:
9282 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
9284 case DW_FORM_indirect
:
9285 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9286 info_ptr
+= bytes_read
;
9287 /* We need to continue parsing from here, so just go back to
9289 goto skip_attribute
;
9292 error (_("Dwarf Error: Cannot handle %s "
9293 "in DWARF reader [in module %s]"),
9294 dwarf_form_name (form
),
9295 bfd_get_filename (abfd
));
9299 if (abbrev
->has_children
)
9300 return skip_children (reader
, info_ptr
);
9305 /* Locate ORIG_PDI's sibling.
9306 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
9308 static const gdb_byte
*
9309 locate_pdi_sibling (const struct die_reader_specs
*reader
,
9310 struct partial_die_info
*orig_pdi
,
9311 const gdb_byte
*info_ptr
)
9313 /* Do we know the sibling already? */
9315 if (orig_pdi
->sibling
)
9316 return orig_pdi
->sibling
;
9318 /* Are there any children to deal with? */
9320 if (!orig_pdi
->has_children
)
9323 /* Skip the children the long way. */
9325 return skip_children (reader
, info_ptr
);
9328 /* Expand this partial symbol table into a full symbol table. SELF is
9332 dwarf2_read_symtab (struct partial_symtab
*self
,
9333 struct objfile
*objfile
)
9335 struct dwarf2_per_objfile
*dwarf2_per_objfile
9336 = get_dwarf2_per_objfile (objfile
);
9340 warning (_("bug: psymtab for %s is already read in."),
9347 printf_filtered (_("Reading in symbols for %s..."),
9349 gdb_flush (gdb_stdout
);
9352 /* If this psymtab is constructed from a debug-only objfile, the
9353 has_section_at_zero flag will not necessarily be correct. We
9354 can get the correct value for this flag by looking at the data
9355 associated with the (presumably stripped) associated objfile. */
9356 if (objfile
->separate_debug_objfile_backlink
)
9358 struct dwarf2_per_objfile
*dpo_backlink
9359 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
9361 dwarf2_per_objfile
->has_section_at_zero
9362 = dpo_backlink
->has_section_at_zero
;
9365 dwarf2_per_objfile
->reading_partial_symbols
= 0;
9367 psymtab_to_symtab_1 (self
);
9369 /* Finish up the debug error message. */
9371 printf_filtered (_("done.\n"));
9374 process_cu_includes (dwarf2_per_objfile
);
9377 /* Reading in full CUs. */
9379 /* Add PER_CU to the queue. */
9382 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9383 enum language pretend_language
)
9385 struct dwarf2_queue_item
*item
;
9388 item
= XNEW (struct dwarf2_queue_item
);
9389 item
->per_cu
= per_cu
;
9390 item
->pretend_language
= pretend_language
;
9393 if (dwarf2_queue
== NULL
)
9394 dwarf2_queue
= item
;
9396 dwarf2_queue_tail
->next
= item
;
9398 dwarf2_queue_tail
= item
;
9401 /* If PER_CU is not yet queued, add it to the queue.
9402 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
9404 The result is non-zero if PER_CU was queued, otherwise the result is zero
9405 meaning either PER_CU is already queued or it is already loaded.
9407 N.B. There is an invariant here that if a CU is queued then it is loaded.
9408 The caller is required to load PER_CU if we return non-zero. */
9411 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
9412 struct dwarf2_per_cu_data
*per_cu
,
9413 enum language pretend_language
)
9415 /* We may arrive here during partial symbol reading, if we need full
9416 DIEs to process an unusual case (e.g. template arguments). Do
9417 not queue PER_CU, just tell our caller to load its DIEs. */
9418 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
9420 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
9425 /* Mark the dependence relation so that we don't flush PER_CU
9427 if (dependent_cu
!= NULL
)
9428 dwarf2_add_dependence (dependent_cu
, per_cu
);
9430 /* If it's already on the queue, we have nothing to do. */
9434 /* If the compilation unit is already loaded, just mark it as
9436 if (per_cu
->cu
!= NULL
)
9438 per_cu
->cu
->last_used
= 0;
9442 /* Add it to the queue. */
9443 queue_comp_unit (per_cu
, pretend_language
);
9448 /* Process the queue. */
9451 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9453 struct dwarf2_queue_item
*item
, *next_item
;
9455 if (dwarf_read_debug
)
9457 fprintf_unfiltered (gdb_stdlog
,
9458 "Expanding one or more symtabs of objfile %s ...\n",
9459 objfile_name (dwarf2_per_objfile
->objfile
));
9462 /* The queue starts out with one item, but following a DIE reference
9463 may load a new CU, adding it to the end of the queue. */
9464 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
9466 if ((dwarf2_per_objfile
->using_index
9467 ? !item
->per_cu
->v
.quick
->compunit_symtab
9468 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
9469 /* Skip dummy CUs. */
9470 && item
->per_cu
->cu
!= NULL
)
9472 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
9473 unsigned int debug_print_threshold
;
9476 if (per_cu
->is_debug_types
)
9478 struct signatured_type
*sig_type
=
9479 (struct signatured_type
*) per_cu
;
9481 sprintf (buf
, "TU %s at offset %s",
9482 hex_string (sig_type
->signature
),
9483 sect_offset_str (per_cu
->sect_off
));
9484 /* There can be 100s of TUs.
9485 Only print them in verbose mode. */
9486 debug_print_threshold
= 2;
9490 sprintf (buf
, "CU at offset %s",
9491 sect_offset_str (per_cu
->sect_off
));
9492 debug_print_threshold
= 1;
9495 if (dwarf_read_debug
>= debug_print_threshold
)
9496 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
9498 if (per_cu
->is_debug_types
)
9499 process_full_type_unit (per_cu
, item
->pretend_language
);
9501 process_full_comp_unit (per_cu
, item
->pretend_language
);
9503 if (dwarf_read_debug
>= debug_print_threshold
)
9504 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
9507 item
->per_cu
->queued
= 0;
9508 next_item
= item
->next
;
9512 dwarf2_queue_tail
= NULL
;
9514 if (dwarf_read_debug
)
9516 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
9517 objfile_name (dwarf2_per_objfile
->objfile
));
9521 /* Read in full symbols for PST, and anything it depends on. */
9524 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
9526 struct dwarf2_per_cu_data
*per_cu
;
9532 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
9533 if (!pst
->dependencies
[i
]->readin
9534 && pst
->dependencies
[i
]->user
== NULL
)
9536 /* Inform about additional files that need to be read in. */
9539 /* FIXME: i18n: Need to make this a single string. */
9540 fputs_filtered (" ", gdb_stdout
);
9542 fputs_filtered ("and ", gdb_stdout
);
9544 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
9545 wrap_here (""); /* Flush output. */
9546 gdb_flush (gdb_stdout
);
9548 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
9551 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
9555 /* It's an include file, no symbols to read for it.
9556 Everything is in the parent symtab. */
9561 dw2_do_instantiate_symtab (per_cu
);
9564 /* Trivial hash function for die_info: the hash value of a DIE
9565 is its offset in .debug_info for this objfile. */
9568 die_hash (const void *item
)
9570 const struct die_info
*die
= (const struct die_info
*) item
;
9572 return to_underlying (die
->sect_off
);
9575 /* Trivial comparison function for die_info structures: two DIEs
9576 are equal if they have the same offset. */
9579 die_eq (const void *item_lhs
, const void *item_rhs
)
9581 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9582 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9584 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9587 /* die_reader_func for load_full_comp_unit.
9588 This is identical to read_signatured_type_reader,
9589 but is kept separate for now. */
9592 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
9593 const gdb_byte
*info_ptr
,
9594 struct die_info
*comp_unit_die
,
9598 struct dwarf2_cu
*cu
= reader
->cu
;
9599 enum language
*language_ptr
= (enum language
*) data
;
9601 gdb_assert (cu
->die_hash
== NULL
);
9603 htab_create_alloc_ex (cu
->header
.length
/ 12,
9607 &cu
->comp_unit_obstack
,
9608 hashtab_obstack_allocate
,
9609 dummy_obstack_deallocate
);
9612 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
9613 &info_ptr
, comp_unit_die
);
9614 cu
->dies
= comp_unit_die
;
9615 /* comp_unit_die is not stored in die_hash, no need. */
9617 /* We try not to read any attributes in this function, because not
9618 all CUs needed for references have been loaded yet, and symbol
9619 table processing isn't initialized. But we have to set the CU language,
9620 or we won't be able to build types correctly.
9621 Similarly, if we do not read the producer, we can not apply
9622 producer-specific interpretation. */
9623 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
9626 /* Load the DIEs associated with PER_CU into memory. */
9629 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9630 enum language pretend_language
)
9632 gdb_assert (! this_cu
->is_debug_types
);
9634 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1,
9635 load_full_comp_unit_reader
, &pretend_language
);
9638 /* Add a DIE to the delayed physname list. */
9641 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9642 const char *name
, struct die_info
*die
,
9643 struct dwarf2_cu
*cu
)
9645 struct delayed_method_info mi
;
9647 mi
.fnfield_index
= fnfield_index
;
9651 cu
->method_list
.push_back (mi
);
9654 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9655 "const" / "volatile". If so, decrements LEN by the length of the
9656 modifier and return true. Otherwise return false. */
9660 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9662 size_t mod_len
= sizeof (mod
) - 1;
9663 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9671 /* Compute the physnames of any methods on the CU's method list.
9673 The computation of method physnames is delayed in order to avoid the
9674 (bad) condition that one of the method's formal parameters is of an as yet
9678 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9680 /* Only C++ delays computing physnames. */
9681 if (cu
->method_list
.empty ())
9683 gdb_assert (cu
->language
== language_cplus
);
9685 for (struct delayed_method_info
&mi
: cu
->method_list
)
9687 const char *physname
;
9688 struct fn_fieldlist
*fn_flp
9689 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9690 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9691 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9692 = physname
? physname
: "";
9694 /* Since there's no tag to indicate whether a method is a
9695 const/volatile overload, extract that information out of the
9697 if (physname
!= NULL
)
9699 size_t len
= strlen (physname
);
9703 if (physname
[len
] == ')') /* shortcut */
9705 else if (check_modifier (physname
, len
, " const"))
9706 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9707 else if (check_modifier (physname
, len
, " volatile"))
9708 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9715 /* The list is no longer needed. */
9716 cu
->method_list
.clear ();
9719 /* Go objects should be embedded in a DW_TAG_module DIE,
9720 and it's not clear if/how imported objects will appear.
9721 To keep Go support simple until that's worked out,
9722 go back through what we've read and create something usable.
9723 We could do this while processing each DIE, and feels kinda cleaner,
9724 but that way is more invasive.
9725 This is to, for example, allow the user to type "p var" or "b main"
9726 without having to specify the package name, and allow lookups
9727 of module.object to work in contexts that use the expression
9731 fixup_go_packaging (struct dwarf2_cu
*cu
)
9733 char *package_name
= NULL
;
9734 struct pending
*list
;
9737 for (list
= global_symbols
; list
!= NULL
; list
= list
->next
)
9739 for (i
= 0; i
< list
->nsyms
; ++i
)
9741 struct symbol
*sym
= list
->symbol
[i
];
9743 if (SYMBOL_LANGUAGE (sym
) == language_go
9744 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9746 char *this_package_name
= go_symbol_package_name (sym
);
9748 if (this_package_name
== NULL
)
9750 if (package_name
== NULL
)
9751 package_name
= this_package_name
;
9754 struct objfile
*objfile
9755 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9756 if (strcmp (package_name
, this_package_name
) != 0)
9757 complaint (&symfile_complaints
,
9758 _("Symtab %s has objects from two different Go packages: %s and %s"),
9759 (symbol_symtab (sym
) != NULL
9760 ? symtab_to_filename_for_display
9761 (symbol_symtab (sym
))
9762 : objfile_name (objfile
)),
9763 this_package_name
, package_name
);
9764 xfree (this_package_name
);
9770 if (package_name
!= NULL
)
9772 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9773 const char *saved_package_name
9774 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
9776 strlen (package_name
));
9777 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9778 saved_package_name
);
9781 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
9783 sym
= allocate_symbol (objfile
);
9784 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
9785 SYMBOL_SET_NAMES (sym
, saved_package_name
,
9786 strlen (saved_package_name
), 0, objfile
);
9787 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9788 e.g., "main" finds the "main" module and not C's main(). */
9789 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9790 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9791 SYMBOL_TYPE (sym
) = type
;
9793 add_symbol_to_list (sym
, &global_symbols
);
9795 xfree (package_name
);
9799 /* Allocate a fully-qualified name consisting of the two parts on the
9803 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9805 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9808 /* A helper that allocates a struct discriminant_info to attach to a
9811 static struct discriminant_info
*
9812 alloc_discriminant_info (struct type
*type
, int discriminant_index
,
9815 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9816 gdb_assert (discriminant_index
== -1
9817 || (discriminant_index
>= 0
9818 && discriminant_index
< TYPE_NFIELDS (type
)));
9819 gdb_assert (default_index
== -1
9820 || (default_index
>= 0 && default_index
< TYPE_NFIELDS (type
)));
9822 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
9824 struct discriminant_info
*disc
9825 = ((struct discriminant_info
*)
9827 offsetof (struct discriminant_info
, discriminants
)
9828 + TYPE_NFIELDS (type
) * sizeof (disc
->discriminants
[0])));
9829 disc
->default_index
= default_index
;
9830 disc
->discriminant_index
= discriminant_index
;
9832 struct dynamic_prop prop
;
9833 prop
.kind
= PROP_UNDEFINED
;
9834 prop
.data
.baton
= disc
;
9836 add_dyn_prop (DYN_PROP_DISCRIMINATED
, prop
, type
);
9841 /* Some versions of rustc emitted enums in an unusual way.
9843 Ordinary enums were emitted as unions. The first element of each
9844 structure in the union was named "RUST$ENUM$DISR". This element
9845 held the discriminant.
9847 These versions of Rust also implemented the "non-zero"
9848 optimization. When the enum had two values, and one is empty and
9849 the other holds a pointer that cannot be zero, the pointer is used
9850 as the discriminant, with a zero value meaning the empty variant.
9851 Here, the union's first member is of the form
9852 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9853 where the fieldnos are the indices of the fields that should be
9854 traversed in order to find the field (which may be several fields deep)
9855 and the variantname is the name of the variant of the case when the
9858 This function recognizes whether TYPE is of one of these forms,
9859 and, if so, smashes it to be a variant type. */
9862 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9864 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9866 /* We don't need to deal with empty enums. */
9867 if (TYPE_NFIELDS (type
) == 0)
9870 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9871 if (TYPE_NFIELDS (type
) == 1
9872 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9874 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9876 /* Decode the field name to find the offset of the
9878 ULONGEST bit_offset
= 0;
9879 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9880 while (name
[0] >= '0' && name
[0] <= '9')
9883 unsigned long index
= strtoul (name
, &tail
, 10);
9886 || index
>= TYPE_NFIELDS (field_type
)
9887 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9888 != FIELD_LOC_KIND_BITPOS
))
9890 complaint (&symfile_complaints
,
9891 _("Could not parse Rust enum encoding string \"%s\""
9893 TYPE_FIELD_NAME (type
, 0),
9894 objfile_name (objfile
));
9899 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9900 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9903 /* Make a union to hold the variants. */
9904 struct type
*union_type
= alloc_type (objfile
);
9905 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9906 TYPE_NFIELDS (union_type
) = 3;
9907 TYPE_FIELDS (union_type
)
9908 = (struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
));
9909 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9910 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
9912 /* Put the discriminant must at index 0. */
9913 TYPE_FIELD_TYPE (union_type
, 0) = field_type
;
9914 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
9915 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
9916 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 0), bit_offset
);
9918 /* The order of fields doesn't really matter, so put the real
9919 field at index 1 and the data-less field at index 2. */
9920 struct discriminant_info
*disc
9921 = alloc_discriminant_info (union_type
, 0, 1);
9922 TYPE_FIELD (union_type
, 1) = TYPE_FIELD (type
, 0);
9923 TYPE_FIELD_NAME (union_type
, 1)
9924 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1)));
9925 TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1))
9926 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9927 TYPE_FIELD_NAME (union_type
, 1));
9929 const char *dataless_name
9930 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
9932 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
9934 TYPE_FIELD_TYPE (union_type
, 2) = dataless_type
;
9935 /* NAME points into the original discriminant name, which
9936 already has the correct lifetime. */
9937 TYPE_FIELD_NAME (union_type
, 2) = name
;
9938 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 2), 0);
9939 disc
->discriminants
[2] = 0;
9941 /* Smash this type to be a structure type. We have to do this
9942 because the type has already been recorded. */
9943 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9944 TYPE_NFIELDS (type
) = 1;
9946 = (struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
));
9948 /* Install the variant part. */
9949 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9950 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9951 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
9953 else if (TYPE_NFIELDS (type
) == 1)
9955 /* We assume that a union with a single field is a univariant
9957 /* Smash this type to be a structure type. We have to do this
9958 because the type has already been recorded. */
9959 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
9961 /* Make a union to hold the variants. */
9962 struct type
*union_type
= alloc_type (objfile
);
9963 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
9964 TYPE_NFIELDS (union_type
) = TYPE_NFIELDS (type
);
9965 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
9966 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
9967 TYPE_FIELDS (union_type
) = TYPE_FIELDS (type
);
9969 struct type
*field_type
= TYPE_FIELD_TYPE (union_type
, 0);
9970 const char *variant_name
9971 = rust_last_path_segment (TYPE_NAME (field_type
));
9972 TYPE_FIELD_NAME (union_type
, 0) = variant_name
;
9973 TYPE_NAME (field_type
)
9974 = rust_fully_qualify (&objfile
->objfile_obstack
,
9975 TYPE_NAME (type
), variant_name
);
9977 /* Install the union in the outer struct type. */
9978 TYPE_NFIELDS (type
) = 1;
9980 = (struct field
*) TYPE_ZALLOC (union_type
, sizeof (struct field
));
9981 TYPE_FIELD_TYPE (type
, 0) = union_type
;
9982 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
9983 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
9985 alloc_discriminant_info (union_type
, -1, 0);
9989 struct type
*disr_type
= nullptr;
9990 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
9992 disr_type
= TYPE_FIELD_TYPE (type
, i
);
9994 if (TYPE_CODE (disr_type
) != TYPE_CODE_STRUCT
)
9996 /* All fields of a true enum will be structs. */
9999 else if (TYPE_NFIELDS (disr_type
) == 0)
10001 /* Could be data-less variant, so keep going. */
10002 disr_type
= nullptr;
10004 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
10005 "RUST$ENUM$DISR") != 0)
10007 /* Not a Rust enum. */
10017 /* If we got here without a discriminant, then it's probably
10019 if (disr_type
== nullptr)
10022 /* Smash this type to be a structure type. We have to do this
10023 because the type has already been recorded. */
10024 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10026 /* Make a union to hold the variants. */
10027 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
10028 struct type
*union_type
= alloc_type (objfile
);
10029 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10030 TYPE_NFIELDS (union_type
) = 1 + TYPE_NFIELDS (type
);
10031 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10032 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
10033 TYPE_FIELDS (union_type
)
10034 = (struct field
*) TYPE_ZALLOC (union_type
,
10035 (TYPE_NFIELDS (union_type
)
10036 * sizeof (struct field
)));
10038 memcpy (TYPE_FIELDS (union_type
) + 1, TYPE_FIELDS (type
),
10039 TYPE_NFIELDS (type
) * sizeof (struct field
));
10041 /* Install the discriminant at index 0 in the union. */
10042 TYPE_FIELD (union_type
, 0) = *disr_field
;
10043 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
10044 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
10046 /* Install the union in the outer struct type. */
10047 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10048 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10049 TYPE_NFIELDS (type
) = 1;
10051 /* Set the size and offset of the union type. */
10052 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10054 /* We need a way to find the correct discriminant given a
10055 variant name. For convenience we build a map here. */
10056 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
10057 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
10058 for (int i
= 0; i
< TYPE_NFIELDS (enum_type
); ++i
)
10060 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
10063 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
10064 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
10068 int n_fields
= TYPE_NFIELDS (union_type
);
10069 struct discriminant_info
*disc
10070 = alloc_discriminant_info (union_type
, 0, -1);
10071 /* Skip the discriminant here. */
10072 for (int i
= 1; i
< n_fields
; ++i
)
10074 /* Find the final word in the name of this variant's type.
10075 That name can be used to look up the correct
10077 const char *variant_name
10078 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
,
10081 auto iter
= discriminant_map
.find (variant_name
);
10082 if (iter
!= discriminant_map
.end ())
10083 disc
->discriminants
[i
] = iter
->second
;
10085 /* Remove the discriminant field, if it exists. */
10086 struct type
*sub_type
= TYPE_FIELD_TYPE (union_type
, i
);
10087 if (TYPE_NFIELDS (sub_type
) > 0)
10089 --TYPE_NFIELDS (sub_type
);
10090 ++TYPE_FIELDS (sub_type
);
10092 TYPE_FIELD_NAME (union_type
, i
) = variant_name
;
10093 TYPE_NAME (sub_type
)
10094 = rust_fully_qualify (&objfile
->objfile_obstack
,
10095 TYPE_NAME (type
), variant_name
);
10100 /* Rewrite some Rust unions to be structures with variants parts. */
10103 rust_union_quirks (struct dwarf2_cu
*cu
)
10105 gdb_assert (cu
->language
== language_rust
);
10106 for (struct type
*type
: cu
->rust_unions
)
10107 quirk_rust_enum (type
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
10110 /* Return the symtab for PER_CU. This works properly regardless of
10111 whether we're using the index or psymtabs. */
10113 static struct compunit_symtab
*
10114 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
10116 return (per_cu
->dwarf2_per_objfile
->using_index
10117 ? per_cu
->v
.quick
->compunit_symtab
10118 : per_cu
->v
.psymtab
->compunit_symtab
);
10121 /* A helper function for computing the list of all symbol tables
10122 included by PER_CU. */
10125 recursively_compute_inclusions (VEC (compunit_symtab_ptr
) **result
,
10126 htab_t all_children
, htab_t all_type_symtabs
,
10127 struct dwarf2_per_cu_data
*per_cu
,
10128 struct compunit_symtab
*immediate_parent
)
10132 struct compunit_symtab
*cust
;
10133 struct dwarf2_per_cu_data
*iter
;
10135 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
10138 /* This inclusion and its children have been processed. */
10143 /* Only add a CU if it has a symbol table. */
10144 cust
= get_compunit_symtab (per_cu
);
10147 /* If this is a type unit only add its symbol table if we haven't
10148 seen it yet (type unit per_cu's can share symtabs). */
10149 if (per_cu
->is_debug_types
)
10151 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
10155 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
10156 if (cust
->user
== NULL
)
10157 cust
->user
= immediate_parent
;
10162 VEC_safe_push (compunit_symtab_ptr
, *result
, cust
);
10163 if (cust
->user
== NULL
)
10164 cust
->user
= immediate_parent
;
10169 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
10172 recursively_compute_inclusions (result
, all_children
,
10173 all_type_symtabs
, iter
, cust
);
10177 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
10181 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
10183 gdb_assert (! per_cu
->is_debug_types
);
10185 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
10188 struct dwarf2_per_cu_data
*per_cu_iter
;
10189 struct compunit_symtab
*compunit_symtab_iter
;
10190 VEC (compunit_symtab_ptr
) *result_symtabs
= NULL
;
10191 htab_t all_children
, all_type_symtabs
;
10192 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
10194 /* If we don't have a symtab, we can just skip this case. */
10198 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10199 NULL
, xcalloc
, xfree
);
10200 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10201 NULL
, xcalloc
, xfree
);
10204 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
10208 recursively_compute_inclusions (&result_symtabs
, all_children
,
10209 all_type_symtabs
, per_cu_iter
,
10213 /* Now we have a transitive closure of all the included symtabs. */
10214 len
= VEC_length (compunit_symtab_ptr
, result_symtabs
);
10216 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
10217 struct compunit_symtab
*, len
+ 1);
10219 VEC_iterate (compunit_symtab_ptr
, result_symtabs
, ix
,
10220 compunit_symtab_iter
);
10222 cust
->includes
[ix
] = compunit_symtab_iter
;
10223 cust
->includes
[len
] = NULL
;
10225 VEC_free (compunit_symtab_ptr
, result_symtabs
);
10226 htab_delete (all_children
);
10227 htab_delete (all_type_symtabs
);
10231 /* Compute the 'includes' field for the symtabs of all the CUs we just
10235 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
10238 struct dwarf2_per_cu_data
*iter
;
10241 VEC_iterate (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
,
10245 if (! iter
->is_debug_types
)
10246 compute_compunit_symtab_includes (iter
);
10249 VEC_free (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
);
10252 /* Generate full symbol information for PER_CU, whose DIEs have
10253 already been loaded into memory. */
10256 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
10257 enum language pretend_language
)
10259 struct dwarf2_cu
*cu
= per_cu
->cu
;
10260 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10261 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10262 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10263 CORE_ADDR lowpc
, highpc
;
10264 struct compunit_symtab
*cust
;
10265 CORE_ADDR baseaddr
;
10266 struct block
*static_block
;
10269 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10272 scoped_free_pendings free_pending
;
10274 /* Clear the list here in case something was left over. */
10275 cu
->method_list
.clear ();
10277 cu
->list_in_scope
= &file_symbols
;
10279 cu
->language
= pretend_language
;
10280 cu
->language_defn
= language_def (cu
->language
);
10282 /* Do line number decoding in read_file_scope () */
10283 process_die (cu
->dies
, cu
);
10285 /* For now fudge the Go package. */
10286 if (cu
->language
== language_go
)
10287 fixup_go_packaging (cu
);
10289 /* Now that we have processed all the DIEs in the CU, all the types
10290 should be complete, and it should now be safe to compute all of the
10292 compute_delayed_physnames (cu
);
10294 if (cu
->language
== language_rust
)
10295 rust_union_quirks (cu
);
10297 /* Some compilers don't define a DW_AT_high_pc attribute for the
10298 compilation unit. If the DW_AT_high_pc is missing, synthesize
10299 it, by scanning the DIE's below the compilation unit. */
10300 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
10302 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
10303 static_block
= end_symtab_get_static_block (addr
, 0, 1);
10305 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
10306 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
10307 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
10308 addrmap to help ensure it has an accurate map of pc values belonging to
10310 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
10312 cust
= end_symtab_from_static_block (static_block
,
10313 SECT_OFF_TEXT (objfile
), 0);
10317 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
10319 /* Set symtab language to language from DW_AT_language. If the
10320 compilation is from a C file generated by language preprocessors, do
10321 not set the language if it was already deduced by start_subfile. */
10322 if (!(cu
->language
== language_c
10323 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
10324 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10326 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
10327 produce DW_AT_location with location lists but it can be possibly
10328 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
10329 there were bugs in prologue debug info, fixed later in GCC-4.5
10330 by "unwind info for epilogues" patch (which is not directly related).
10332 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
10333 needed, it would be wrong due to missing DW_AT_producer there.
10335 Still one can confuse GDB by using non-standard GCC compilation
10336 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
10338 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
10339 cust
->locations_valid
= 1;
10341 if (gcc_4_minor
>= 5)
10342 cust
->epilogue_unwind_valid
= 1;
10344 cust
->call_site_htab
= cu
->call_site_htab
;
10347 if (dwarf2_per_objfile
->using_index
)
10348 per_cu
->v
.quick
->compunit_symtab
= cust
;
10351 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10352 pst
->compunit_symtab
= cust
;
10356 /* Push it for inclusion processing later. */
10357 VEC_safe_push (dwarf2_per_cu_ptr
, dwarf2_per_objfile
->just_read_cus
, per_cu
);
10360 /* Generate full symbol information for type unit PER_CU, whose DIEs have
10361 already been loaded into memory. */
10364 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
10365 enum language pretend_language
)
10367 struct dwarf2_cu
*cu
= per_cu
->cu
;
10368 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10369 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10370 struct compunit_symtab
*cust
;
10371 struct signatured_type
*sig_type
;
10373 gdb_assert (per_cu
->is_debug_types
);
10374 sig_type
= (struct signatured_type
*) per_cu
;
10377 scoped_free_pendings free_pending
;
10379 /* Clear the list here in case something was left over. */
10380 cu
->method_list
.clear ();
10382 cu
->list_in_scope
= &file_symbols
;
10384 cu
->language
= pretend_language
;
10385 cu
->language_defn
= language_def (cu
->language
);
10387 /* The symbol tables are set up in read_type_unit_scope. */
10388 process_die (cu
->dies
, cu
);
10390 /* For now fudge the Go package. */
10391 if (cu
->language
== language_go
)
10392 fixup_go_packaging (cu
);
10394 /* Now that we have processed all the DIEs in the CU, all the types
10395 should be complete, and it should now be safe to compute all of the
10397 compute_delayed_physnames (cu
);
10399 if (cu
->language
== language_rust
)
10400 rust_union_quirks (cu
);
10402 /* TUs share symbol tables.
10403 If this is the first TU to use this symtab, complete the construction
10404 of it with end_expandable_symtab. Otherwise, complete the addition of
10405 this TU's symbols to the existing symtab. */
10406 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
10408 cust
= end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
10409 sig_type
->type_unit_group
->compunit_symtab
= cust
;
10413 /* Set symtab language to language from DW_AT_language. If the
10414 compilation is from a C file generated by language preprocessors,
10415 do not set the language if it was already deduced by
10417 if (!(cu
->language
== language_c
10418 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
10419 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10424 augment_type_symtab ();
10425 cust
= sig_type
->type_unit_group
->compunit_symtab
;
10428 if (dwarf2_per_objfile
->using_index
)
10429 per_cu
->v
.quick
->compunit_symtab
= cust
;
10432 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10433 pst
->compunit_symtab
= cust
;
10438 /* Process an imported unit DIE. */
10441 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10443 struct attribute
*attr
;
10445 /* For now we don't handle imported units in type units. */
10446 if (cu
->per_cu
->is_debug_types
)
10448 error (_("Dwarf Error: DW_TAG_imported_unit is not"
10449 " supported in type units [in module %s]"),
10450 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
10453 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10456 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
10457 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
10458 dwarf2_per_cu_data
*per_cu
10459 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
10460 cu
->per_cu
->dwarf2_per_objfile
);
10462 /* If necessary, add it to the queue and load its DIEs. */
10463 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
10464 load_full_comp_unit (per_cu
, cu
->language
);
10466 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
10471 /* RAII object that represents a process_die scope: i.e.,
10472 starts/finishes processing a DIE. */
10473 class process_die_scope
10476 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
10477 : m_die (die
), m_cu (cu
)
10479 /* We should only be processing DIEs not already in process. */
10480 gdb_assert (!m_die
->in_process
);
10481 m_die
->in_process
= true;
10484 ~process_die_scope ()
10486 m_die
->in_process
= false;
10488 /* If we're done processing the DIE for the CU that owns the line
10489 header, we don't need the line header anymore. */
10490 if (m_cu
->line_header_die_owner
== m_die
)
10492 delete m_cu
->line_header
;
10493 m_cu
->line_header
= NULL
;
10494 m_cu
->line_header_die_owner
= NULL
;
10503 /* Process a die and its children. */
10506 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10508 process_die_scope
scope (die
, cu
);
10512 case DW_TAG_padding
:
10514 case DW_TAG_compile_unit
:
10515 case DW_TAG_partial_unit
:
10516 read_file_scope (die
, cu
);
10518 case DW_TAG_type_unit
:
10519 read_type_unit_scope (die
, cu
);
10521 case DW_TAG_subprogram
:
10522 case DW_TAG_inlined_subroutine
:
10523 read_func_scope (die
, cu
);
10525 case DW_TAG_lexical_block
:
10526 case DW_TAG_try_block
:
10527 case DW_TAG_catch_block
:
10528 read_lexical_block_scope (die
, cu
);
10530 case DW_TAG_call_site
:
10531 case DW_TAG_GNU_call_site
:
10532 read_call_site_scope (die
, cu
);
10534 case DW_TAG_class_type
:
10535 case DW_TAG_interface_type
:
10536 case DW_TAG_structure_type
:
10537 case DW_TAG_union_type
:
10538 process_structure_scope (die
, cu
);
10540 case DW_TAG_enumeration_type
:
10541 process_enumeration_scope (die
, cu
);
10544 /* These dies have a type, but processing them does not create
10545 a symbol or recurse to process the children. Therefore we can
10546 read them on-demand through read_type_die. */
10547 case DW_TAG_subroutine_type
:
10548 case DW_TAG_set_type
:
10549 case DW_TAG_array_type
:
10550 case DW_TAG_pointer_type
:
10551 case DW_TAG_ptr_to_member_type
:
10552 case DW_TAG_reference_type
:
10553 case DW_TAG_rvalue_reference_type
:
10554 case DW_TAG_string_type
:
10557 case DW_TAG_base_type
:
10558 case DW_TAG_subrange_type
:
10559 case DW_TAG_typedef
:
10560 /* Add a typedef symbol for the type definition, if it has a
10562 new_symbol (die
, read_type_die (die
, cu
), cu
);
10564 case DW_TAG_common_block
:
10565 read_common_block (die
, cu
);
10567 case DW_TAG_common_inclusion
:
10569 case DW_TAG_namespace
:
10570 cu
->processing_has_namespace_info
= 1;
10571 read_namespace (die
, cu
);
10573 case DW_TAG_module
:
10574 cu
->processing_has_namespace_info
= 1;
10575 read_module (die
, cu
);
10577 case DW_TAG_imported_declaration
:
10578 cu
->processing_has_namespace_info
= 1;
10579 if (read_namespace_alias (die
, cu
))
10581 /* The declaration is not a global namespace alias: fall through. */
10582 case DW_TAG_imported_module
:
10583 cu
->processing_has_namespace_info
= 1;
10584 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10585 || cu
->language
!= language_fortran
))
10586 complaint (&symfile_complaints
, _("Tag '%s' has unexpected children"),
10587 dwarf_tag_name (die
->tag
));
10588 read_import_statement (die
, cu
);
10591 case DW_TAG_imported_unit
:
10592 process_imported_unit_die (die
, cu
);
10595 case DW_TAG_variable
:
10596 read_variable (die
, cu
);
10600 new_symbol (die
, NULL
, cu
);
10605 /* DWARF name computation. */
10607 /* A helper function for dwarf2_compute_name which determines whether DIE
10608 needs to have the name of the scope prepended to the name listed in the
10612 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10614 struct attribute
*attr
;
10618 case DW_TAG_namespace
:
10619 case DW_TAG_typedef
:
10620 case DW_TAG_class_type
:
10621 case DW_TAG_interface_type
:
10622 case DW_TAG_structure_type
:
10623 case DW_TAG_union_type
:
10624 case DW_TAG_enumeration_type
:
10625 case DW_TAG_enumerator
:
10626 case DW_TAG_subprogram
:
10627 case DW_TAG_inlined_subroutine
:
10628 case DW_TAG_member
:
10629 case DW_TAG_imported_declaration
:
10632 case DW_TAG_variable
:
10633 case DW_TAG_constant
:
10634 /* We only need to prefix "globally" visible variables. These include
10635 any variable marked with DW_AT_external or any variable that
10636 lives in a namespace. [Variables in anonymous namespaces
10637 require prefixing, but they are not DW_AT_external.] */
10639 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10641 struct dwarf2_cu
*spec_cu
= cu
;
10643 return die_needs_namespace (die_specification (die
, &spec_cu
),
10647 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10648 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10649 && die
->parent
->tag
!= DW_TAG_module
)
10651 /* A variable in a lexical block of some kind does not need a
10652 namespace, even though in C++ such variables may be external
10653 and have a mangled name. */
10654 if (die
->parent
->tag
== DW_TAG_lexical_block
10655 || die
->parent
->tag
== DW_TAG_try_block
10656 || die
->parent
->tag
== DW_TAG_catch_block
10657 || die
->parent
->tag
== DW_TAG_subprogram
)
10666 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10667 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10668 defined for the given DIE. */
10670 static struct attribute
*
10671 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10673 struct attribute
*attr
;
10675 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10677 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10682 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10683 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10684 defined for the given DIE. */
10686 static const char *
10687 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10689 const char *linkage_name
;
10691 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10692 if (linkage_name
== NULL
)
10693 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10695 return linkage_name
;
10698 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10699 compute the physname for the object, which include a method's:
10700 - formal parameters (C++),
10701 - receiver type (Go),
10703 The term "physname" is a bit confusing.
10704 For C++, for example, it is the demangled name.
10705 For Go, for example, it's the mangled name.
10707 For Ada, return the DIE's linkage name rather than the fully qualified
10708 name. PHYSNAME is ignored..
10710 The result is allocated on the objfile_obstack and canonicalized. */
10712 static const char *
10713 dwarf2_compute_name (const char *name
,
10714 struct die_info
*die
, struct dwarf2_cu
*cu
,
10717 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10720 name
= dwarf2_name (die
, cu
);
10722 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10723 but otherwise compute it by typename_concat inside GDB.
10724 FIXME: Actually this is not really true, or at least not always true.
10725 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
10726 Fortran names because there is no mangling standard. So new_symbol
10727 will set the demangled name to the result of dwarf2_full_name, and it is
10728 the demangled name that GDB uses if it exists. */
10729 if (cu
->language
== language_ada
10730 || (cu
->language
== language_fortran
&& physname
))
10732 /* For Ada unit, we prefer the linkage name over the name, as
10733 the former contains the exported name, which the user expects
10734 to be able to reference. Ideally, we want the user to be able
10735 to reference this entity using either natural or linkage name,
10736 but we haven't started looking at this enhancement yet. */
10737 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10739 if (linkage_name
!= NULL
)
10740 return linkage_name
;
10743 /* These are the only languages we know how to qualify names in. */
10745 && (cu
->language
== language_cplus
10746 || cu
->language
== language_fortran
|| cu
->language
== language_d
10747 || cu
->language
== language_rust
))
10749 if (die_needs_namespace (die
, cu
))
10751 const char *prefix
;
10752 const char *canonical_name
= NULL
;
10756 prefix
= determine_prefix (die
, cu
);
10757 if (*prefix
!= '\0')
10759 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
10762 buf
.puts (prefixed_name
);
10763 xfree (prefixed_name
);
10768 /* Template parameters may be specified in the DIE's DW_AT_name, or
10769 as children with DW_TAG_template_type_param or
10770 DW_TAG_value_type_param. If the latter, add them to the name
10771 here. If the name already has template parameters, then
10772 skip this step; some versions of GCC emit both, and
10773 it is more efficient to use the pre-computed name.
10775 Something to keep in mind about this process: it is very
10776 unlikely, or in some cases downright impossible, to produce
10777 something that will match the mangled name of a function.
10778 If the definition of the function has the same debug info,
10779 we should be able to match up with it anyway. But fallbacks
10780 using the minimal symbol, for instance to find a method
10781 implemented in a stripped copy of libstdc++, will not work.
10782 If we do not have debug info for the definition, we will have to
10783 match them up some other way.
10785 When we do name matching there is a related problem with function
10786 templates; two instantiated function templates are allowed to
10787 differ only by their return types, which we do not add here. */
10789 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10791 struct attribute
*attr
;
10792 struct die_info
*child
;
10795 die
->building_fullname
= 1;
10797 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10801 const gdb_byte
*bytes
;
10802 struct dwarf2_locexpr_baton
*baton
;
10805 if (child
->tag
!= DW_TAG_template_type_param
10806 && child
->tag
!= DW_TAG_template_value_param
)
10817 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10820 complaint (&symfile_complaints
,
10821 _("template parameter missing DW_AT_type"));
10822 buf
.puts ("UNKNOWN_TYPE");
10825 type
= die_type (child
, cu
);
10827 if (child
->tag
== DW_TAG_template_type_param
)
10829 c_print_type (type
, "", &buf
, -1, 0, &type_print_raw_options
);
10833 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10836 complaint (&symfile_complaints
,
10837 _("template parameter missing "
10838 "DW_AT_const_value"));
10839 buf
.puts ("UNKNOWN_VALUE");
10843 dwarf2_const_value_attr (attr
, type
, name
,
10844 &cu
->comp_unit_obstack
, cu
,
10845 &value
, &bytes
, &baton
);
10847 if (TYPE_NOSIGN (type
))
10848 /* GDB prints characters as NUMBER 'CHAR'. If that's
10849 changed, this can use value_print instead. */
10850 c_printchar (value
, type
, &buf
);
10853 struct value_print_options opts
;
10856 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10860 else if (bytes
!= NULL
)
10862 v
= allocate_value (type
);
10863 memcpy (value_contents_writeable (v
), bytes
,
10864 TYPE_LENGTH (type
));
10867 v
= value_from_longest (type
, value
);
10869 /* Specify decimal so that we do not depend on
10871 get_formatted_print_options (&opts
, 'd');
10873 value_print (v
, &buf
, &opts
);
10878 die
->building_fullname
= 0;
10882 /* Close the argument list, with a space if necessary
10883 (nested templates). */
10884 if (!buf
.empty () && buf
.string ().back () == '>')
10891 /* For C++ methods, append formal parameter type
10892 information, if PHYSNAME. */
10894 if (physname
&& die
->tag
== DW_TAG_subprogram
10895 && cu
->language
== language_cplus
)
10897 struct type
*type
= read_type_die (die
, cu
);
10899 c_type_print_args (type
, &buf
, 1, cu
->language
,
10900 &type_print_raw_options
);
10902 if (cu
->language
== language_cplus
)
10904 /* Assume that an artificial first parameter is
10905 "this", but do not crash if it is not. RealView
10906 marks unnamed (and thus unused) parameters as
10907 artificial; there is no way to differentiate
10909 if (TYPE_NFIELDS (type
) > 0
10910 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10911 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
10912 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10914 buf
.puts (" const");
10918 const std::string
&intermediate_name
= buf
.string ();
10920 if (cu
->language
== language_cplus
)
10922 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
10923 &objfile
->per_bfd
->storage_obstack
);
10925 /* If we only computed INTERMEDIATE_NAME, or if
10926 INTERMEDIATE_NAME is already canonical, then we need to
10927 copy it to the appropriate obstack. */
10928 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
10929 name
= ((const char *)
10930 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
10931 intermediate_name
.c_str (),
10932 intermediate_name
.length ()));
10934 name
= canonical_name
;
10941 /* Return the fully qualified name of DIE, based on its DW_AT_name.
10942 If scope qualifiers are appropriate they will be added. The result
10943 will be allocated on the storage_obstack, or NULL if the DIE does
10944 not have a name. NAME may either be from a previous call to
10945 dwarf2_name or NULL.
10947 The output string will be canonicalized (if C++). */
10949 static const char *
10950 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10952 return dwarf2_compute_name (name
, die
, cu
, 0);
10955 /* Construct a physname for the given DIE in CU. NAME may either be
10956 from a previous call to dwarf2_name or NULL. The result will be
10957 allocated on the objfile_objstack or NULL if the DIE does not have a
10960 The output string will be canonicalized (if C++). */
10962 static const char *
10963 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
10965 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10966 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
10969 /* In this case dwarf2_compute_name is just a shortcut not building anything
10971 if (!die_needs_namespace (die
, cu
))
10972 return dwarf2_compute_name (name
, die
, cu
, 1);
10974 mangled
= dw2_linkage_name (die
, cu
);
10976 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
10977 See https://github.com/rust-lang/rust/issues/32925. */
10978 if (cu
->language
== language_rust
&& mangled
!= NULL
10979 && strchr (mangled
, '{') != NULL
)
10982 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
10984 gdb::unique_xmalloc_ptr
<char> demangled
;
10985 if (mangled
!= NULL
)
10988 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
10990 /* Do nothing (do not demangle the symbol name). */
10992 else if (cu
->language
== language_go
)
10994 /* This is a lie, but we already lie to the caller new_symbol.
10995 new_symbol assumes we return the mangled name.
10996 This just undoes that lie until things are cleaned up. */
11000 /* Use DMGL_RET_DROP for C++ template functions to suppress
11001 their return type. It is easier for GDB users to search
11002 for such functions as `name(params)' than `long name(params)'.
11003 In such case the minimal symbol names do not match the full
11004 symbol names but for template functions there is never a need
11005 to look up their definition from their declaration so
11006 the only disadvantage remains the minimal symbol variant
11007 `long name(params)' does not have the proper inferior type. */
11008 demangled
.reset (gdb_demangle (mangled
,
11009 (DMGL_PARAMS
| DMGL_ANSI
11010 | DMGL_RET_DROP
)));
11013 canon
= demangled
.get ();
11021 if (canon
== NULL
|| check_physname
)
11023 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
11025 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
11027 /* It may not mean a bug in GDB. The compiler could also
11028 compute DW_AT_linkage_name incorrectly. But in such case
11029 GDB would need to be bug-to-bug compatible. */
11031 complaint (&symfile_complaints
,
11032 _("Computed physname <%s> does not match demangled <%s> "
11033 "(from linkage <%s>) - DIE at %s [in module %s]"),
11034 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
11035 objfile_name (objfile
));
11037 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
11038 is available here - over computed PHYSNAME. It is safer
11039 against both buggy GDB and buggy compilers. */
11053 retval
= ((const char *)
11054 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
11055 retval
, strlen (retval
)));
11060 /* Inspect DIE in CU for a namespace alias. If one exists, record
11061 a new symbol for it.
11063 Returns 1 if a namespace alias was recorded, 0 otherwise. */
11066 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
11068 struct attribute
*attr
;
11070 /* If the die does not have a name, this is not a namespace
11072 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11076 struct die_info
*d
= die
;
11077 struct dwarf2_cu
*imported_cu
= cu
;
11079 /* If the compiler has nested DW_AT_imported_declaration DIEs,
11080 keep inspecting DIEs until we hit the underlying import. */
11081 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
11082 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
11084 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
11088 d
= follow_die_ref (d
, attr
, &imported_cu
);
11089 if (d
->tag
!= DW_TAG_imported_declaration
)
11093 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
11095 complaint (&symfile_complaints
,
11096 _("DIE at %s has too many recursively imported "
11097 "declarations"), sect_offset_str (d
->sect_off
));
11104 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
11106 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
11107 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
11109 /* This declaration is a global namespace alias. Add
11110 a symbol for it whose type is the aliased namespace. */
11111 new_symbol (die
, type
, cu
);
11120 /* Return the using directives repository (global or local?) to use in the
11121 current context for LANGUAGE.
11123 For Ada, imported declarations can materialize renamings, which *may* be
11124 global. However it is impossible (for now?) in DWARF to distinguish
11125 "external" imported declarations and "static" ones. As all imported
11126 declarations seem to be static in all other languages, make them all CU-wide
11127 global only in Ada. */
11129 static struct using_direct
**
11130 using_directives (enum language language
)
11132 if (language
== language_ada
&& context_stack_depth
== 0)
11133 return &global_using_directives
;
11135 return &local_using_directives
;
11138 /* Read the import statement specified by the given die and record it. */
11141 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
11143 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11144 struct attribute
*import_attr
;
11145 struct die_info
*imported_die
, *child_die
;
11146 struct dwarf2_cu
*imported_cu
;
11147 const char *imported_name
;
11148 const char *imported_name_prefix
;
11149 const char *canonical_name
;
11150 const char *import_alias
;
11151 const char *imported_declaration
= NULL
;
11152 const char *import_prefix
;
11153 std::vector
<const char *> excludes
;
11155 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
11156 if (import_attr
== NULL
)
11158 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
11159 dwarf_tag_name (die
->tag
));
11164 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
11165 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11166 if (imported_name
== NULL
)
11168 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
11170 The import in the following code:
11184 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
11185 <52> DW_AT_decl_file : 1
11186 <53> DW_AT_decl_line : 6
11187 <54> DW_AT_import : <0x75>
11188 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
11189 <59> DW_AT_name : B
11190 <5b> DW_AT_decl_file : 1
11191 <5c> DW_AT_decl_line : 2
11192 <5d> DW_AT_type : <0x6e>
11194 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
11195 <76> DW_AT_byte_size : 4
11196 <77> DW_AT_encoding : 5 (signed)
11198 imports the wrong die ( 0x75 instead of 0x58 ).
11199 This case will be ignored until the gcc bug is fixed. */
11203 /* Figure out the local name after import. */
11204 import_alias
= dwarf2_name (die
, cu
);
11206 /* Figure out where the statement is being imported to. */
11207 import_prefix
= determine_prefix (die
, cu
);
11209 /* Figure out what the scope of the imported die is and prepend it
11210 to the name of the imported die. */
11211 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
11213 if (imported_die
->tag
!= DW_TAG_namespace
11214 && imported_die
->tag
!= DW_TAG_module
)
11216 imported_declaration
= imported_name
;
11217 canonical_name
= imported_name_prefix
;
11219 else if (strlen (imported_name_prefix
) > 0)
11220 canonical_name
= obconcat (&objfile
->objfile_obstack
,
11221 imported_name_prefix
,
11222 (cu
->language
== language_d
? "." : "::"),
11223 imported_name
, (char *) NULL
);
11225 canonical_name
= imported_name
;
11227 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
11228 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11229 child_die
= sibling_die (child_die
))
11231 /* DWARF-4: A Fortran use statement with a “rename list” may be
11232 represented by an imported module entry with an import attribute
11233 referring to the module and owned entries corresponding to those
11234 entities that are renamed as part of being imported. */
11236 if (child_die
->tag
!= DW_TAG_imported_declaration
)
11238 complaint (&symfile_complaints
,
11239 _("child DW_TAG_imported_declaration expected "
11240 "- DIE at %s [in module %s]"),
11241 sect_offset_str (child_die
->sect_off
),
11242 objfile_name (objfile
));
11246 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
11247 if (import_attr
== NULL
)
11249 complaint (&symfile_complaints
, _("Tag '%s' has no DW_AT_import"),
11250 dwarf_tag_name (child_die
->tag
));
11255 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
11257 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11258 if (imported_name
== NULL
)
11260 complaint (&symfile_complaints
,
11261 _("child DW_TAG_imported_declaration has unknown "
11262 "imported name - DIE at %s [in module %s]"),
11263 sect_offset_str (child_die
->sect_off
),
11264 objfile_name (objfile
));
11268 excludes
.push_back (imported_name
);
11270 process_die (child_die
, cu
);
11273 add_using_directive (using_directives (cu
->language
),
11277 imported_declaration
,
11280 &objfile
->objfile_obstack
);
11283 /* ICC<14 does not output the required DW_AT_declaration on incomplete
11284 types, but gives them a size of zero. Starting with version 14,
11285 ICC is compatible with GCC. */
11288 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
11290 if (!cu
->checked_producer
)
11291 check_producer (cu
);
11293 return cu
->producer_is_icc_lt_14
;
11296 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
11297 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
11298 this, it was first present in GCC release 4.3.0. */
11301 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
11303 if (!cu
->checked_producer
)
11304 check_producer (cu
);
11306 return cu
->producer_is_gcc_lt_4_3
;
11309 static file_and_directory
11310 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
11312 file_and_directory res
;
11314 /* Find the filename. Do not use dwarf2_name here, since the filename
11315 is not a source language identifier. */
11316 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
11317 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
11319 if (res
.comp_dir
== NULL
11320 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
11321 && IS_ABSOLUTE_PATH (res
.name
))
11323 res
.comp_dir_storage
= ldirname (res
.name
);
11324 if (!res
.comp_dir_storage
.empty ())
11325 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
11327 if (res
.comp_dir
!= NULL
)
11329 /* Irix 6.2 native cc prepends <machine>.: to the compilation
11330 directory, get rid of it. */
11331 const char *cp
= strchr (res
.comp_dir
, ':');
11333 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
11334 res
.comp_dir
= cp
+ 1;
11337 if (res
.name
== NULL
)
11338 res
.name
= "<unknown>";
11343 /* Handle DW_AT_stmt_list for a compilation unit.
11344 DIE is the DW_TAG_compile_unit die for CU.
11345 COMP_DIR is the compilation directory. LOWPC is passed to
11346 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
11349 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
11350 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
11352 struct dwarf2_per_objfile
*dwarf2_per_objfile
11353 = cu
->per_cu
->dwarf2_per_objfile
;
11354 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11355 struct attribute
*attr
;
11356 struct line_header line_header_local
;
11357 hashval_t line_header_local_hash
;
11359 int decode_mapping
;
11361 gdb_assert (! cu
->per_cu
->is_debug_types
);
11363 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11367 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11369 /* The line header hash table is only created if needed (it exists to
11370 prevent redundant reading of the line table for partial_units).
11371 If we're given a partial_unit, we'll need it. If we're given a
11372 compile_unit, then use the line header hash table if it's already
11373 created, but don't create one just yet. */
11375 if (dwarf2_per_objfile
->line_header_hash
== NULL
11376 && die
->tag
== DW_TAG_partial_unit
)
11378 dwarf2_per_objfile
->line_header_hash
11379 = htab_create_alloc_ex (127, line_header_hash_voidp
,
11380 line_header_eq_voidp
,
11381 free_line_header_voidp
,
11382 &objfile
->objfile_obstack
,
11383 hashtab_obstack_allocate
,
11384 dummy_obstack_deallocate
);
11387 line_header_local
.sect_off
= line_offset
;
11388 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
11389 line_header_local_hash
= line_header_hash (&line_header_local
);
11390 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
11392 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11393 &line_header_local
,
11394 line_header_local_hash
, NO_INSERT
);
11396 /* For DW_TAG_compile_unit we need info like symtab::linetable which
11397 is not present in *SLOT (since if there is something in *SLOT then
11398 it will be for a partial_unit). */
11399 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
11401 gdb_assert (*slot
!= NULL
);
11402 cu
->line_header
= (struct line_header
*) *slot
;
11407 /* dwarf_decode_line_header does not yet provide sufficient information.
11408 We always have to call also dwarf_decode_lines for it. */
11409 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
11413 cu
->line_header
= lh
.release ();
11414 cu
->line_header_die_owner
= die
;
11416 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
11420 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11421 &line_header_local
,
11422 line_header_local_hash
, INSERT
);
11423 gdb_assert (slot
!= NULL
);
11425 if (slot
!= NULL
&& *slot
== NULL
)
11427 /* This newly decoded line number information unit will be owned
11428 by line_header_hash hash table. */
11429 *slot
= cu
->line_header
;
11430 cu
->line_header_die_owner
= NULL
;
11434 /* We cannot free any current entry in (*slot) as that struct line_header
11435 may be already used by multiple CUs. Create only temporary decoded
11436 line_header for this CU - it may happen at most once for each line
11437 number information unit. And if we're not using line_header_hash
11438 then this is what we want as well. */
11439 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
11441 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
11442 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
11447 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
11450 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11452 struct dwarf2_per_objfile
*dwarf2_per_objfile
11453 = cu
->per_cu
->dwarf2_per_objfile
;
11454 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11455 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11456 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
11457 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
11458 struct attribute
*attr
;
11459 struct die_info
*child_die
;
11460 CORE_ADDR baseaddr
;
11462 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11464 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
11466 /* If we didn't find a lowpc, set it to highpc to avoid complaints
11467 from finish_block. */
11468 if (lowpc
== ((CORE_ADDR
) -1))
11470 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11472 file_and_directory fnd
= find_file_and_directory (die
, cu
);
11474 prepare_one_comp_unit (cu
, die
, cu
->language
);
11476 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
11477 standardised yet. As a workaround for the language detection we fall
11478 back to the DW_AT_producer string. */
11479 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
11480 cu
->language
= language_opencl
;
11482 /* Similar hack for Go. */
11483 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
11484 set_cu_language (DW_LANG_Go
, cu
);
11486 dwarf2_start_symtab (cu
, fnd
.name
, fnd
.comp_dir
, lowpc
);
11488 /* Decode line number information if present. We do this before
11489 processing child DIEs, so that the line header table is available
11490 for DW_AT_decl_file. */
11491 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
11493 /* Process all dies in compilation unit. */
11494 if (die
->child
!= NULL
)
11496 child_die
= die
->child
;
11497 while (child_die
&& child_die
->tag
)
11499 process_die (child_die
, cu
);
11500 child_die
= sibling_die (child_die
);
11504 /* Decode macro information, if present. Dwarf 2 macro information
11505 refers to information in the line number info statement program
11506 header, so we can only read it if we've read the header
11508 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11510 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11511 if (attr
&& cu
->line_header
)
11513 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11514 complaint (&symfile_complaints
,
11515 _("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11517 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
11521 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11522 if (attr
&& cu
->line_header
)
11524 unsigned int macro_offset
= DW_UNSND (attr
);
11526 dwarf_decode_macros (cu
, macro_offset
, 0);
11531 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
11532 Create the set of symtabs used by this TU, or if this TU is sharing
11533 symtabs with another TU and the symtabs have already been created
11534 then restore those symtabs in the line header.
11535 We don't need the pc/line-number mapping for type units. */
11538 setup_type_unit_groups (struct die_info
*die
, struct dwarf2_cu
*cu
)
11540 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
11541 struct type_unit_group
*tu_group
;
11543 struct attribute
*attr
;
11545 struct signatured_type
*sig_type
;
11547 gdb_assert (per_cu
->is_debug_types
);
11548 sig_type
= (struct signatured_type
*) per_cu
;
11550 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11552 /* If we're using .gdb_index (includes -readnow) then
11553 per_cu->type_unit_group may not have been set up yet. */
11554 if (sig_type
->type_unit_group
== NULL
)
11555 sig_type
->type_unit_group
= get_type_unit_group (cu
, attr
);
11556 tu_group
= sig_type
->type_unit_group
;
11558 /* If we've already processed this stmt_list there's no real need to
11559 do it again, we could fake it and just recreate the part we need
11560 (file name,index -> symtab mapping). If data shows this optimization
11561 is useful we can do it then. */
11562 first_time
= tu_group
->compunit_symtab
== NULL
;
11564 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11569 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11570 lh
= dwarf_decode_line_header (line_offset
, cu
);
11575 dwarf2_start_symtab (cu
, "", NULL
, 0);
11578 gdb_assert (tu_group
->symtabs
== NULL
);
11579 restart_symtab (tu_group
->compunit_symtab
, "", 0);
11584 cu
->line_header
= lh
.release ();
11585 cu
->line_header_die_owner
= die
;
11589 struct compunit_symtab
*cust
= dwarf2_start_symtab (cu
, "", NULL
, 0);
11591 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11592 still initializing it, and our caller (a few levels up)
11593 process_full_type_unit still needs to know if this is the first
11596 tu_group
->num_symtabs
= cu
->line_header
->file_names
.size ();
11597 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
11598 cu
->line_header
->file_names
.size ());
11600 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
11602 file_entry
&fe
= cu
->line_header
->file_names
[i
];
11604 dwarf2_start_subfile (fe
.name
, fe
.include_dir (cu
->line_header
));
11606 if (current_subfile
->symtab
== NULL
)
11608 /* NOTE: start_subfile will recognize when it's been
11609 passed a file it has already seen. So we can't
11610 assume there's a simple mapping from
11611 cu->line_header->file_names to subfiles, plus
11612 cu->line_header->file_names may contain dups. */
11613 current_subfile
->symtab
11614 = allocate_symtab (cust
, current_subfile
->name
);
11617 fe
.symtab
= current_subfile
->symtab
;
11618 tu_group
->symtabs
[i
] = fe
.symtab
;
11623 restart_symtab (tu_group
->compunit_symtab
, "", 0);
11625 for (i
= 0; i
< cu
->line_header
->file_names
.size (); ++i
)
11627 file_entry
&fe
= cu
->line_header
->file_names
[i
];
11629 fe
.symtab
= tu_group
->symtabs
[i
];
11633 /* The main symtab is allocated last. Type units don't have DW_AT_name
11634 so they don't have a "real" (so to speak) symtab anyway.
11635 There is later code that will assign the main symtab to all symbols
11636 that don't have one. We need to handle the case of a symbol with a
11637 missing symtab (DW_AT_decl_file) anyway. */
11640 /* Process DW_TAG_type_unit.
11641 For TUs we want to skip the first top level sibling if it's not the
11642 actual type being defined by this TU. In this case the first top
11643 level sibling is there to provide context only. */
11646 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11648 struct die_info
*child_die
;
11650 prepare_one_comp_unit (cu
, die
, language_minimal
);
11652 /* Initialize (or reinitialize) the machinery for building symtabs.
11653 We do this before processing child DIEs, so that the line header table
11654 is available for DW_AT_decl_file. */
11655 setup_type_unit_groups (die
, cu
);
11657 if (die
->child
!= NULL
)
11659 child_die
= die
->child
;
11660 while (child_die
&& child_die
->tag
)
11662 process_die (child_die
, cu
);
11663 child_die
= sibling_die (child_die
);
11670 http://gcc.gnu.org/wiki/DebugFission
11671 http://gcc.gnu.org/wiki/DebugFissionDWP
11673 To simplify handling of both DWO files ("object" files with the DWARF info)
11674 and DWP files (a file with the DWOs packaged up into one file), we treat
11675 DWP files as having a collection of virtual DWO files. */
11678 hash_dwo_file (const void *item
)
11680 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11683 hash
= htab_hash_string (dwo_file
->dwo_name
);
11684 if (dwo_file
->comp_dir
!= NULL
)
11685 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11690 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11692 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11693 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11695 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11697 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11698 return lhs
->comp_dir
== rhs
->comp_dir
;
11699 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11702 /* Allocate a hash table for DWO files. */
11705 allocate_dwo_file_hash_table (struct objfile
*objfile
)
11707 return htab_create_alloc_ex (41,
11711 &objfile
->objfile_obstack
,
11712 hashtab_obstack_allocate
,
11713 dummy_obstack_deallocate
);
11716 /* Lookup DWO file DWO_NAME. */
11719 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11720 const char *dwo_name
,
11721 const char *comp_dir
)
11723 struct dwo_file find_entry
;
11726 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11727 dwarf2_per_objfile
->dwo_files
11728 = allocate_dwo_file_hash_table (dwarf2_per_objfile
->objfile
);
11730 memset (&find_entry
, 0, sizeof (find_entry
));
11731 find_entry
.dwo_name
= dwo_name
;
11732 find_entry
.comp_dir
= comp_dir
;
11733 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
11739 hash_dwo_unit (const void *item
)
11741 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11743 /* This drops the top 32 bits of the id, but is ok for a hash. */
11744 return dwo_unit
->signature
;
11748 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11750 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11751 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11753 /* The signature is assumed to be unique within the DWO file.
11754 So while object file CU dwo_id's always have the value zero,
11755 that's OK, assuming each object file DWO file has only one CU,
11756 and that's the rule for now. */
11757 return lhs
->signature
== rhs
->signature
;
11760 /* Allocate a hash table for DWO CUs,TUs.
11761 There is one of these tables for each of CUs,TUs for each DWO file. */
11764 allocate_dwo_unit_table (struct objfile
*objfile
)
11766 /* Start out with a pretty small number.
11767 Generally DWO files contain only one CU and maybe some TUs. */
11768 return htab_create_alloc_ex (3,
11772 &objfile
->objfile_obstack
,
11773 hashtab_obstack_allocate
,
11774 dummy_obstack_deallocate
);
11777 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
11779 struct create_dwo_cu_data
11781 struct dwo_file
*dwo_file
;
11782 struct dwo_unit dwo_unit
;
11785 /* die_reader_func for create_dwo_cu. */
11788 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11789 const gdb_byte
*info_ptr
,
11790 struct die_info
*comp_unit_die
,
11794 struct dwarf2_cu
*cu
= reader
->cu
;
11795 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11796 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11797 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
11798 struct dwo_file
*dwo_file
= data
->dwo_file
;
11799 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
11800 struct attribute
*attr
;
11802 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
11805 complaint (&symfile_complaints
,
11806 _("Dwarf Error: debug entry at offset %s is missing"
11807 " its dwo_id [in module %s]"),
11808 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11812 dwo_unit
->dwo_file
= dwo_file
;
11813 dwo_unit
->signature
= DW_UNSND (attr
);
11814 dwo_unit
->section
= section
;
11815 dwo_unit
->sect_off
= sect_off
;
11816 dwo_unit
->length
= cu
->per_cu
->length
;
11818 if (dwarf_read_debug
)
11819 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11820 sect_offset_str (sect_off
),
11821 hex_string (dwo_unit
->signature
));
11824 /* Create the dwo_units for the CUs in a DWO_FILE.
11825 Note: This function processes DWO files only, not DWP files. */
11828 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11829 struct dwo_file
&dwo_file
, dwarf2_section_info
§ion
,
11832 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11833 const gdb_byte
*info_ptr
, *end_ptr
;
11835 dwarf2_read_section (objfile
, §ion
);
11836 info_ptr
= section
.buffer
;
11838 if (info_ptr
== NULL
)
11841 if (dwarf_read_debug
)
11843 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11844 get_section_name (§ion
),
11845 get_section_file_name (§ion
));
11848 end_ptr
= info_ptr
+ section
.size
;
11849 while (info_ptr
< end_ptr
)
11851 struct dwarf2_per_cu_data per_cu
;
11852 struct create_dwo_cu_data create_dwo_cu_data
;
11853 struct dwo_unit
*dwo_unit
;
11855 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11857 memset (&create_dwo_cu_data
.dwo_unit
, 0,
11858 sizeof (create_dwo_cu_data
.dwo_unit
));
11859 memset (&per_cu
, 0, sizeof (per_cu
));
11860 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11861 per_cu
.is_debug_types
= 0;
11862 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11863 per_cu
.section
= §ion
;
11864 create_dwo_cu_data
.dwo_file
= &dwo_file
;
11866 init_cutu_and_read_dies_no_follow (
11867 &per_cu
, &dwo_file
, create_dwo_cu_reader
, &create_dwo_cu_data
);
11868 info_ptr
+= per_cu
.length
;
11870 // If the unit could not be parsed, skip it.
11871 if (create_dwo_cu_data
.dwo_unit
.dwo_file
== NULL
)
11874 if (cus_htab
== NULL
)
11875 cus_htab
= allocate_dwo_unit_table (objfile
);
11877 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11878 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
11879 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
11880 gdb_assert (slot
!= NULL
);
11883 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11884 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11886 complaint (&symfile_complaints
,
11887 _("debug cu entry at offset %s is duplicate to"
11888 " the entry at offset %s, signature %s"),
11889 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11890 hex_string (dwo_unit
->signature
));
11892 *slot
= (void *)dwo_unit
;
11896 /* DWP file .debug_{cu,tu}_index section format:
11897 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11901 Both index sections have the same format, and serve to map a 64-bit
11902 signature to a set of section numbers. Each section begins with a header,
11903 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11904 indexes, and a pool of 32-bit section numbers. The index sections will be
11905 aligned at 8-byte boundaries in the file.
11907 The index section header consists of:
11909 V, 32 bit version number
11911 N, 32 bit number of compilation units or type units in the index
11912 M, 32 bit number of slots in the hash table
11914 Numbers are recorded using the byte order of the application binary.
11916 The hash table begins at offset 16 in the section, and consists of an array
11917 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
11918 order of the application binary). Unused slots in the hash table are 0.
11919 (We rely on the extreme unlikeliness of a signature being exactly 0.)
11921 The parallel table begins immediately after the hash table
11922 (at offset 16 + 8 * M from the beginning of the section), and consists of an
11923 array of 32-bit indexes (using the byte order of the application binary),
11924 corresponding 1-1 with slots in the hash table. Each entry in the parallel
11925 table contains a 32-bit index into the pool of section numbers. For unused
11926 hash table slots, the corresponding entry in the parallel table will be 0.
11928 The pool of section numbers begins immediately following the hash table
11929 (at offset 16 + 12 * M from the beginning of the section). The pool of
11930 section numbers consists of an array of 32-bit words (using the byte order
11931 of the application binary). Each item in the array is indexed starting
11932 from 0. The hash table entry provides the index of the first section
11933 number in the set. Additional section numbers in the set follow, and the
11934 set is terminated by a 0 entry (section number 0 is not used in ELF).
11936 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
11937 section must be the first entry in the set, and the .debug_abbrev.dwo must
11938 be the second entry. Other members of the set may follow in any order.
11944 DWP Version 2 combines all the .debug_info, etc. sections into one,
11945 and the entries in the index tables are now offsets into these sections.
11946 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
11949 Index Section Contents:
11951 Hash Table of Signatures dwp_hash_table.hash_table
11952 Parallel Table of Indices dwp_hash_table.unit_table
11953 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
11954 Table of Section Sizes dwp_hash_table.v2.sizes
11956 The index section header consists of:
11958 V, 32 bit version number
11959 L, 32 bit number of columns in the table of section offsets
11960 N, 32 bit number of compilation units or type units in the index
11961 M, 32 bit number of slots in the hash table
11963 Numbers are recorded using the byte order of the application binary.
11965 The hash table has the same format as version 1.
11966 The parallel table of indices has the same format as version 1,
11967 except that the entries are origin-1 indices into the table of sections
11968 offsets and the table of section sizes.
11970 The table of offsets begins immediately following the parallel table
11971 (at offset 16 + 12 * M from the beginning of the section). The table is
11972 a two-dimensional array of 32-bit words (using the byte order of the
11973 application binary), with L columns and N+1 rows, in row-major order.
11974 Each row in the array is indexed starting from 0. The first row provides
11975 a key to the remaining rows: each column in this row provides an identifier
11976 for a debug section, and the offsets in the same column of subsequent rows
11977 refer to that section. The section identifiers are:
11979 DW_SECT_INFO 1 .debug_info.dwo
11980 DW_SECT_TYPES 2 .debug_types.dwo
11981 DW_SECT_ABBREV 3 .debug_abbrev.dwo
11982 DW_SECT_LINE 4 .debug_line.dwo
11983 DW_SECT_LOC 5 .debug_loc.dwo
11984 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
11985 DW_SECT_MACINFO 7 .debug_macinfo.dwo
11986 DW_SECT_MACRO 8 .debug_macro.dwo
11988 The offsets provided by the CU and TU index sections are the base offsets
11989 for the contributions made by each CU or TU to the corresponding section
11990 in the package file. Each CU and TU header contains an abbrev_offset
11991 field, used to find the abbreviations table for that CU or TU within the
11992 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
11993 be interpreted as relative to the base offset given in the index section.
11994 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
11995 should be interpreted as relative to the base offset for .debug_line.dwo,
11996 and offsets into other debug sections obtained from DWARF attributes should
11997 also be interpreted as relative to the corresponding base offset.
11999 The table of sizes begins immediately following the table of offsets.
12000 Like the table of offsets, it is a two-dimensional array of 32-bit words,
12001 with L columns and N rows, in row-major order. Each row in the array is
12002 indexed starting from 1 (row 0 is shared by the two tables).
12006 Hash table lookup is handled the same in version 1 and 2:
12008 We assume that N and M will not exceed 2^32 - 1.
12009 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
12011 Given a 64-bit compilation unit signature or a type signature S, an entry
12012 in the hash table is located as follows:
12014 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
12015 the low-order k bits all set to 1.
12017 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
12019 3) If the hash table entry at index H matches the signature, use that
12020 entry. If the hash table entry at index H is unused (all zeroes),
12021 terminate the search: the signature is not present in the table.
12023 4) Let H = (H + H') modulo M. Repeat at Step 3.
12025 Because M > N and H' and M are relatively prime, the search is guaranteed
12026 to stop at an unused slot or find the match. */
12028 /* Create a hash table to map DWO IDs to their CU/TU entry in
12029 .debug_{info,types}.dwo in DWP_FILE.
12030 Returns NULL if there isn't one.
12031 Note: This function processes DWP files only, not DWO files. */
12033 static struct dwp_hash_table
*
12034 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12035 struct dwp_file
*dwp_file
, int is_debug_types
)
12037 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12038 bfd
*dbfd
= dwp_file
->dbfd
;
12039 const gdb_byte
*index_ptr
, *index_end
;
12040 struct dwarf2_section_info
*index
;
12041 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
12042 struct dwp_hash_table
*htab
;
12044 if (is_debug_types
)
12045 index
= &dwp_file
->sections
.tu_index
;
12047 index
= &dwp_file
->sections
.cu_index
;
12049 if (dwarf2_section_empty_p (index
))
12051 dwarf2_read_section (objfile
, index
);
12053 index_ptr
= index
->buffer
;
12054 index_end
= index_ptr
+ index
->size
;
12056 version
= read_4_bytes (dbfd
, index_ptr
);
12059 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
12063 nr_units
= read_4_bytes (dbfd
, index_ptr
);
12065 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
12068 if (version
!= 1 && version
!= 2)
12070 error (_("Dwarf Error: unsupported DWP file version (%s)"
12071 " [in module %s]"),
12072 pulongest (version
), dwp_file
->name
);
12074 if (nr_slots
!= (nr_slots
& -nr_slots
))
12076 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
12077 " is not power of 2 [in module %s]"),
12078 pulongest (nr_slots
), dwp_file
->name
);
12081 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
12082 htab
->version
= version
;
12083 htab
->nr_columns
= nr_columns
;
12084 htab
->nr_units
= nr_units
;
12085 htab
->nr_slots
= nr_slots
;
12086 htab
->hash_table
= index_ptr
;
12087 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
12089 /* Exit early if the table is empty. */
12090 if (nr_slots
== 0 || nr_units
== 0
12091 || (version
== 2 && nr_columns
== 0))
12093 /* All must be zero. */
12094 if (nr_slots
!= 0 || nr_units
!= 0
12095 || (version
== 2 && nr_columns
!= 0))
12097 complaint (&symfile_complaints
,
12098 _("Empty DWP but nr_slots,nr_units,nr_columns not"
12099 " all zero [in modules %s]"),
12107 htab
->section_pool
.v1
.indices
=
12108 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12109 /* It's harder to decide whether the section is too small in v1.
12110 V1 is deprecated anyway so we punt. */
12114 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12115 int *ids
= htab
->section_pool
.v2
.section_ids
;
12116 /* Reverse map for error checking. */
12117 int ids_seen
[DW_SECT_MAX
+ 1];
12120 if (nr_columns
< 2)
12122 error (_("Dwarf Error: bad DWP hash table, too few columns"
12123 " in section table [in module %s]"),
12126 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
12128 error (_("Dwarf Error: bad DWP hash table, too many columns"
12129 " in section table [in module %s]"),
12132 memset (ids
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
12133 memset (ids_seen
, 255, (DW_SECT_MAX
+ 1) * sizeof (int32_t));
12134 for (i
= 0; i
< nr_columns
; ++i
)
12136 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
12138 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
12140 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
12141 " in section table [in module %s]"),
12142 id
, dwp_file
->name
);
12144 if (ids_seen
[id
] != -1)
12146 error (_("Dwarf Error: bad DWP hash table, duplicate section"
12147 " id %d in section table [in module %s]"),
12148 id
, dwp_file
->name
);
12153 /* Must have exactly one info or types section. */
12154 if (((ids_seen
[DW_SECT_INFO
] != -1)
12155 + (ids_seen
[DW_SECT_TYPES
] != -1))
12158 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
12159 " DWO info/types section [in module %s]"),
12162 /* Must have an abbrev section. */
12163 if (ids_seen
[DW_SECT_ABBREV
] == -1)
12165 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
12166 " section [in module %s]"),
12169 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
12170 htab
->section_pool
.v2
.sizes
=
12171 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
12172 * nr_units
* nr_columns
);
12173 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
12174 * nr_units
* nr_columns
))
12177 error (_("Dwarf Error: DWP index section is corrupt (too small)"
12178 " [in module %s]"),
12186 /* Update SECTIONS with the data from SECTP.
12188 This function is like the other "locate" section routines that are
12189 passed to bfd_map_over_sections, but in this context the sections to
12190 read comes from the DWP V1 hash table, not the full ELF section table.
12192 The result is non-zero for success, or zero if an error was found. */
12195 locate_v1_virtual_dwo_sections (asection
*sectp
,
12196 struct virtual_v1_dwo_sections
*sections
)
12198 const struct dwop_section_names
*names
= &dwop_section_names
;
12200 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12202 /* There can be only one. */
12203 if (sections
->abbrev
.s
.section
!= NULL
)
12205 sections
->abbrev
.s
.section
= sectp
;
12206 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12208 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
12209 || section_is_p (sectp
->name
, &names
->types_dwo
))
12211 /* There can be only one. */
12212 if (sections
->info_or_types
.s
.section
!= NULL
)
12214 sections
->info_or_types
.s
.section
= sectp
;
12215 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
12217 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12219 /* There can be only one. */
12220 if (sections
->line
.s
.section
!= NULL
)
12222 sections
->line
.s
.section
= sectp
;
12223 sections
->line
.size
= bfd_get_section_size (sectp
);
12225 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12227 /* There can be only one. */
12228 if (sections
->loc
.s
.section
!= NULL
)
12230 sections
->loc
.s
.section
= sectp
;
12231 sections
->loc
.size
= bfd_get_section_size (sectp
);
12233 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12235 /* There can be only one. */
12236 if (sections
->macinfo
.s
.section
!= NULL
)
12238 sections
->macinfo
.s
.section
= sectp
;
12239 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12241 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12243 /* There can be only one. */
12244 if (sections
->macro
.s
.section
!= NULL
)
12246 sections
->macro
.s
.section
= sectp
;
12247 sections
->macro
.size
= bfd_get_section_size (sectp
);
12249 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12251 /* There can be only one. */
12252 if (sections
->str_offsets
.s
.section
!= NULL
)
12254 sections
->str_offsets
.s
.section
= sectp
;
12255 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12259 /* No other kind of section is valid. */
12266 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12267 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12268 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12269 This is for DWP version 1 files. */
12271 static struct dwo_unit
*
12272 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12273 struct dwp_file
*dwp_file
,
12274 uint32_t unit_index
,
12275 const char *comp_dir
,
12276 ULONGEST signature
, int is_debug_types
)
12278 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12279 const struct dwp_hash_table
*dwp_htab
=
12280 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12281 bfd
*dbfd
= dwp_file
->dbfd
;
12282 const char *kind
= is_debug_types
? "TU" : "CU";
12283 struct dwo_file
*dwo_file
;
12284 struct dwo_unit
*dwo_unit
;
12285 struct virtual_v1_dwo_sections sections
;
12286 void **dwo_file_slot
;
12289 gdb_assert (dwp_file
->version
== 1);
12291 if (dwarf_read_debug
)
12293 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
12295 pulongest (unit_index
), hex_string (signature
),
12299 /* Fetch the sections of this DWO unit.
12300 Put a limit on the number of sections we look for so that bad data
12301 doesn't cause us to loop forever. */
12303 #define MAX_NR_V1_DWO_SECTIONS \
12304 (1 /* .debug_info or .debug_types */ \
12305 + 1 /* .debug_abbrev */ \
12306 + 1 /* .debug_line */ \
12307 + 1 /* .debug_loc */ \
12308 + 1 /* .debug_str_offsets */ \
12309 + 1 /* .debug_macro or .debug_macinfo */ \
12310 + 1 /* trailing zero */)
12312 memset (§ions
, 0, sizeof (sections
));
12314 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
12317 uint32_t section_nr
=
12318 read_4_bytes (dbfd
,
12319 dwp_htab
->section_pool
.v1
.indices
12320 + (unit_index
+ i
) * sizeof (uint32_t));
12322 if (section_nr
== 0)
12324 if (section_nr
>= dwp_file
->num_sections
)
12326 error (_("Dwarf Error: bad DWP hash table, section number too large"
12327 " [in module %s]"),
12331 sectp
= dwp_file
->elf_sections
[section_nr
];
12332 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
12334 error (_("Dwarf Error: bad DWP hash table, invalid section found"
12335 " [in module %s]"),
12341 || dwarf2_section_empty_p (§ions
.info_or_types
)
12342 || dwarf2_section_empty_p (§ions
.abbrev
))
12344 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
12345 " [in module %s]"),
12348 if (i
== MAX_NR_V1_DWO_SECTIONS
)
12350 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
12351 " [in module %s]"),
12355 /* It's easier for the rest of the code if we fake a struct dwo_file and
12356 have dwo_unit "live" in that. At least for now.
12358 The DWP file can be made up of a random collection of CUs and TUs.
12359 However, for each CU + set of TUs that came from the same original DWO
12360 file, we can combine them back into a virtual DWO file to save space
12361 (fewer struct dwo_file objects to allocate). Remember that for really
12362 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12364 std::string virtual_dwo_name
=
12365 string_printf ("virtual-dwo/%d-%d-%d-%d",
12366 get_section_id (§ions
.abbrev
),
12367 get_section_id (§ions
.line
),
12368 get_section_id (§ions
.loc
),
12369 get_section_id (§ions
.str_offsets
));
12370 /* Can we use an existing virtual DWO file? */
12371 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12372 virtual_dwo_name
.c_str (),
12374 /* Create one if necessary. */
12375 if (*dwo_file_slot
== NULL
)
12377 if (dwarf_read_debug
)
12379 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12380 virtual_dwo_name
.c_str ());
12382 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12384 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12385 virtual_dwo_name
.c_str (),
12386 virtual_dwo_name
.size ());
12387 dwo_file
->comp_dir
= comp_dir
;
12388 dwo_file
->sections
.abbrev
= sections
.abbrev
;
12389 dwo_file
->sections
.line
= sections
.line
;
12390 dwo_file
->sections
.loc
= sections
.loc
;
12391 dwo_file
->sections
.macinfo
= sections
.macinfo
;
12392 dwo_file
->sections
.macro
= sections
.macro
;
12393 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
12394 /* The "str" section is global to the entire DWP file. */
12395 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12396 /* The info or types section is assigned below to dwo_unit,
12397 there's no need to record it in dwo_file.
12398 Also, we can't simply record type sections in dwo_file because
12399 we record a pointer into the vector in dwo_unit. As we collect more
12400 types we'll grow the vector and eventually have to reallocate space
12401 for it, invalidating all copies of pointers into the previous
12403 *dwo_file_slot
= dwo_file
;
12407 if (dwarf_read_debug
)
12409 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12410 virtual_dwo_name
.c_str ());
12412 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12415 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12416 dwo_unit
->dwo_file
= dwo_file
;
12417 dwo_unit
->signature
= signature
;
12418 dwo_unit
->section
=
12419 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12420 *dwo_unit
->section
= sections
.info_or_types
;
12421 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12426 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
12427 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
12428 piece within that section used by a TU/CU, return a virtual section
12429 of just that piece. */
12431 static struct dwarf2_section_info
12432 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12433 struct dwarf2_section_info
*section
,
12434 bfd_size_type offset
, bfd_size_type size
)
12436 struct dwarf2_section_info result
;
12439 gdb_assert (section
!= NULL
);
12440 gdb_assert (!section
->is_virtual
);
12442 memset (&result
, 0, sizeof (result
));
12443 result
.s
.containing_section
= section
;
12444 result
.is_virtual
= 1;
12449 sectp
= get_section_bfd_section (section
);
12451 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
12452 bounds of the real section. This is a pretty-rare event, so just
12453 flag an error (easier) instead of a warning and trying to cope. */
12455 || offset
+ size
> bfd_get_section_size (sectp
))
12457 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
12458 " in section %s [in module %s]"),
12459 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
12460 objfile_name (dwarf2_per_objfile
->objfile
));
12463 result
.virtual_offset
= offset
;
12464 result
.size
= size
;
12468 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12469 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12470 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12471 This is for DWP version 2 files. */
12473 static struct dwo_unit
*
12474 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12475 struct dwp_file
*dwp_file
,
12476 uint32_t unit_index
,
12477 const char *comp_dir
,
12478 ULONGEST signature
, int is_debug_types
)
12480 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12481 const struct dwp_hash_table
*dwp_htab
=
12482 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12483 bfd
*dbfd
= dwp_file
->dbfd
;
12484 const char *kind
= is_debug_types
? "TU" : "CU";
12485 struct dwo_file
*dwo_file
;
12486 struct dwo_unit
*dwo_unit
;
12487 struct virtual_v2_dwo_sections sections
;
12488 void **dwo_file_slot
;
12491 gdb_assert (dwp_file
->version
== 2);
12493 if (dwarf_read_debug
)
12495 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
12497 pulongest (unit_index
), hex_string (signature
),
12501 /* Fetch the section offsets of this DWO unit. */
12503 memset (§ions
, 0, sizeof (sections
));
12505 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12507 uint32_t offset
= read_4_bytes (dbfd
,
12508 dwp_htab
->section_pool
.v2
.offsets
12509 + (((unit_index
- 1) * dwp_htab
->nr_columns
12511 * sizeof (uint32_t)));
12512 uint32_t size
= read_4_bytes (dbfd
,
12513 dwp_htab
->section_pool
.v2
.sizes
12514 + (((unit_index
- 1) * dwp_htab
->nr_columns
12516 * sizeof (uint32_t)));
12518 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12521 case DW_SECT_TYPES
:
12522 sections
.info_or_types_offset
= offset
;
12523 sections
.info_or_types_size
= size
;
12525 case DW_SECT_ABBREV
:
12526 sections
.abbrev_offset
= offset
;
12527 sections
.abbrev_size
= size
;
12530 sections
.line_offset
= offset
;
12531 sections
.line_size
= size
;
12534 sections
.loc_offset
= offset
;
12535 sections
.loc_size
= size
;
12537 case DW_SECT_STR_OFFSETS
:
12538 sections
.str_offsets_offset
= offset
;
12539 sections
.str_offsets_size
= size
;
12541 case DW_SECT_MACINFO
:
12542 sections
.macinfo_offset
= offset
;
12543 sections
.macinfo_size
= size
;
12545 case DW_SECT_MACRO
:
12546 sections
.macro_offset
= offset
;
12547 sections
.macro_size
= size
;
12552 /* It's easier for the rest of the code if we fake a struct dwo_file and
12553 have dwo_unit "live" in that. At least for now.
12555 The DWP file can be made up of a random collection of CUs and TUs.
12556 However, for each CU + set of TUs that came from the same original DWO
12557 file, we can combine them back into a virtual DWO file to save space
12558 (fewer struct dwo_file objects to allocate). Remember that for really
12559 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12561 std::string virtual_dwo_name
=
12562 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12563 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12564 (long) (sections
.line_size
? sections
.line_offset
: 0),
12565 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12566 (long) (sections
.str_offsets_size
12567 ? sections
.str_offsets_offset
: 0));
12568 /* Can we use an existing virtual DWO file? */
12569 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12570 virtual_dwo_name
.c_str (),
12572 /* Create one if necessary. */
12573 if (*dwo_file_slot
== NULL
)
12575 if (dwarf_read_debug
)
12577 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12578 virtual_dwo_name
.c_str ());
12580 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12582 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12583 virtual_dwo_name
.c_str (),
12584 virtual_dwo_name
.size ());
12585 dwo_file
->comp_dir
= comp_dir
;
12586 dwo_file
->sections
.abbrev
=
12587 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
12588 sections
.abbrev_offset
, sections
.abbrev_size
);
12589 dwo_file
->sections
.line
=
12590 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
12591 sections
.line_offset
, sections
.line_size
);
12592 dwo_file
->sections
.loc
=
12593 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12594 sections
.loc_offset
, sections
.loc_size
);
12595 dwo_file
->sections
.macinfo
=
12596 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12597 sections
.macinfo_offset
, sections
.macinfo_size
);
12598 dwo_file
->sections
.macro
=
12599 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12600 sections
.macro_offset
, sections
.macro_size
);
12601 dwo_file
->sections
.str_offsets
=
12602 create_dwp_v2_section (dwarf2_per_objfile
,
12603 &dwp_file
->sections
.str_offsets
,
12604 sections
.str_offsets_offset
,
12605 sections
.str_offsets_size
);
12606 /* The "str" section is global to the entire DWP file. */
12607 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12608 /* The info or types section is assigned below to dwo_unit,
12609 there's no need to record it in dwo_file.
12610 Also, we can't simply record type sections in dwo_file because
12611 we record a pointer into the vector in dwo_unit. As we collect more
12612 types we'll grow the vector and eventually have to reallocate space
12613 for it, invalidating all copies of pointers into the previous
12615 *dwo_file_slot
= dwo_file
;
12619 if (dwarf_read_debug
)
12621 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12622 virtual_dwo_name
.c_str ());
12624 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12627 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12628 dwo_unit
->dwo_file
= dwo_file
;
12629 dwo_unit
->signature
= signature
;
12630 dwo_unit
->section
=
12631 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12632 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12634 ? &dwp_file
->sections
.types
12635 : &dwp_file
->sections
.info
,
12636 sections
.info_or_types_offset
,
12637 sections
.info_or_types_size
);
12638 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12643 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12644 Returns NULL if the signature isn't found. */
12646 static struct dwo_unit
*
12647 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12648 struct dwp_file
*dwp_file
, const char *comp_dir
,
12649 ULONGEST signature
, int is_debug_types
)
12651 const struct dwp_hash_table
*dwp_htab
=
12652 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12653 bfd
*dbfd
= dwp_file
->dbfd
;
12654 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12655 uint32_t hash
= signature
& mask
;
12656 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12659 struct dwo_unit find_dwo_cu
;
12661 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12662 find_dwo_cu
.signature
= signature
;
12663 slot
= htab_find_slot (is_debug_types
12664 ? dwp_file
->loaded_tus
12665 : dwp_file
->loaded_cus
,
12666 &find_dwo_cu
, INSERT
);
12669 return (struct dwo_unit
*) *slot
;
12671 /* Use a for loop so that we don't loop forever on bad debug info. */
12672 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12674 ULONGEST signature_in_table
;
12676 signature_in_table
=
12677 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12678 if (signature_in_table
== signature
)
12680 uint32_t unit_index
=
12681 read_4_bytes (dbfd
,
12682 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12684 if (dwp_file
->version
== 1)
12686 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12687 dwp_file
, unit_index
,
12688 comp_dir
, signature
,
12693 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12694 dwp_file
, unit_index
,
12695 comp_dir
, signature
,
12698 return (struct dwo_unit
*) *slot
;
12700 if (signature_in_table
== 0)
12702 hash
= (hash
+ hash2
) & mask
;
12705 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12706 " [in module %s]"),
12710 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12711 Open the file specified by FILE_NAME and hand it off to BFD for
12712 preliminary analysis. Return a newly initialized bfd *, which
12713 includes a canonicalized copy of FILE_NAME.
12714 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12715 SEARCH_CWD is true if the current directory is to be searched.
12716 It will be searched before debug-file-directory.
12717 If successful, the file is added to the bfd include table of the
12718 objfile's bfd (see gdb_bfd_record_inclusion).
12719 If unable to find/open the file, return NULL.
12720 NOTE: This function is derived from symfile_bfd_open. */
12722 static gdb_bfd_ref_ptr
12723 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12724 const char *file_name
, int is_dwp
, int search_cwd
)
12727 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12728 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12729 to debug_file_directory. */
12730 const char *search_path
;
12731 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12733 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12736 if (*debug_file_directory
!= '\0')
12738 search_path_holder
.reset (concat (".", dirname_separator_string
,
12739 debug_file_directory
,
12741 search_path
= search_path_holder
.get ();
12747 search_path
= debug_file_directory
;
12749 openp_flags flags
= OPF_RETURN_REALPATH
;
12751 flags
|= OPF_SEARCH_IN_PATH
;
12753 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12754 desc
= openp (search_path
, flags
, file_name
,
12755 O_RDONLY
| O_BINARY
, &absolute_name
);
12759 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12761 if (sym_bfd
== NULL
)
12763 bfd_set_cacheable (sym_bfd
.get (), 1);
12765 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12768 /* Success. Record the bfd as having been included by the objfile's bfd.
12769 This is important because things like demangled_names_hash lives in the
12770 objfile's per_bfd space and may have references to things like symbol
12771 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12772 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12777 /* Try to open DWO file FILE_NAME.
12778 COMP_DIR is the DW_AT_comp_dir attribute.
12779 The result is the bfd handle of the file.
12780 If there is a problem finding or opening the file, return NULL.
12781 Upon success, the canonicalized path of the file is stored in the bfd,
12782 same as symfile_bfd_open. */
12784 static gdb_bfd_ref_ptr
12785 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12786 const char *file_name
, const char *comp_dir
)
12788 if (IS_ABSOLUTE_PATH (file_name
))
12789 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12790 0 /*is_dwp*/, 0 /*search_cwd*/);
12792 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12794 if (comp_dir
!= NULL
)
12796 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
12797 file_name
, (char *) NULL
);
12799 /* NOTE: If comp_dir is a relative path, this will also try the
12800 search path, which seems useful. */
12801 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12804 1 /*search_cwd*/));
12805 xfree (path_to_try
);
12810 /* That didn't work, try debug-file-directory, which, despite its name,
12811 is a list of paths. */
12813 if (*debug_file_directory
== '\0')
12816 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12817 0 /*is_dwp*/, 1 /*search_cwd*/);
12820 /* This function is mapped across the sections and remembers the offset and
12821 size of each of the DWO debugging sections we are interested in. */
12824 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12826 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12827 const struct dwop_section_names
*names
= &dwop_section_names
;
12829 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12831 dwo_sections
->abbrev
.s
.section
= sectp
;
12832 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12834 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12836 dwo_sections
->info
.s
.section
= sectp
;
12837 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
12839 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12841 dwo_sections
->line
.s
.section
= sectp
;
12842 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
12844 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12846 dwo_sections
->loc
.s
.section
= sectp
;
12847 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
12849 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12851 dwo_sections
->macinfo
.s
.section
= sectp
;
12852 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12854 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12856 dwo_sections
->macro
.s
.section
= sectp
;
12857 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
12859 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12861 dwo_sections
->str
.s
.section
= sectp
;
12862 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
12864 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12866 dwo_sections
->str_offsets
.s
.section
= sectp
;
12867 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12869 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12871 struct dwarf2_section_info type_section
;
12873 memset (&type_section
, 0, sizeof (type_section
));
12874 type_section
.s
.section
= sectp
;
12875 type_section
.size
= bfd_get_section_size (sectp
);
12876 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
12881 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12882 by PER_CU. This is for the non-DWP case.
12883 The result is NULL if DWO_NAME can't be found. */
12885 static struct dwo_file
*
12886 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12887 const char *dwo_name
, const char *comp_dir
)
12889 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12890 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12892 gdb_bfd_ref_ptr
dbfd (open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
));
12895 if (dwarf_read_debug
)
12896 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12900 /* We use a unique pointer here, despite the obstack allocation,
12901 because a dwo_file needs some cleanup if it is abandoned. */
12902 dwo_file_up
dwo_file (OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
12904 dwo_file
->dwo_name
= dwo_name
;
12905 dwo_file
->comp_dir
= comp_dir
;
12906 dwo_file
->dbfd
= dbfd
.release ();
12908 bfd_map_over_sections (dwo_file
->dbfd
, dwarf2_locate_dwo_sections
,
12909 &dwo_file
->sections
);
12911 create_cus_hash_table (dwarf2_per_objfile
, *dwo_file
, dwo_file
->sections
.info
,
12914 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
12915 dwo_file
->sections
.types
, dwo_file
->tus
);
12917 if (dwarf_read_debug
)
12918 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
12920 return dwo_file
.release ();
12923 /* This function is mapped across the sections and remembers the offset and
12924 size of each of the DWP debugging sections common to version 1 and 2 that
12925 we are interested in. */
12928 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
12929 void *dwp_file_ptr
)
12931 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12932 const struct dwop_section_names
*names
= &dwop_section_names
;
12933 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12935 /* Record the ELF section number for later lookup: this is what the
12936 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12937 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12938 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12940 /* Look for specific sections that we need. */
12941 if (section_is_p (sectp
->name
, &names
->str_dwo
))
12943 dwp_file
->sections
.str
.s
.section
= sectp
;
12944 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
12946 else if (section_is_p (sectp
->name
, &names
->cu_index
))
12948 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
12949 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
12951 else if (section_is_p (sectp
->name
, &names
->tu_index
))
12953 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
12954 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
12958 /* This function is mapped across the sections and remembers the offset and
12959 size of each of the DWP version 2 debugging sections that we are interested
12960 in. This is split into a separate function because we don't know if we
12961 have version 1 or 2 until we parse the cu_index/tu_index sections. */
12964 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
12966 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
12967 const struct dwop_section_names
*names
= &dwop_section_names
;
12968 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
12970 /* Record the ELF section number for later lookup: this is what the
12971 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
12972 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
12973 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
12975 /* Look for specific sections that we need. */
12976 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12978 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
12979 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
12981 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12983 dwp_file
->sections
.info
.s
.section
= sectp
;
12984 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
12986 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12988 dwp_file
->sections
.line
.s
.section
= sectp
;
12989 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
12991 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12993 dwp_file
->sections
.loc
.s
.section
= sectp
;
12994 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
12996 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12998 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
12999 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
13001 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
13003 dwp_file
->sections
.macro
.s
.section
= sectp
;
13004 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
13006 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
13008 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
13009 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
13011 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
13013 dwp_file
->sections
.types
.s
.section
= sectp
;
13014 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
13018 /* Hash function for dwp_file loaded CUs/TUs. */
13021 hash_dwp_loaded_cutus (const void *item
)
13023 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
13025 /* This drops the top 32 bits of the signature, but is ok for a hash. */
13026 return dwo_unit
->signature
;
13029 /* Equality function for dwp_file loaded CUs/TUs. */
13032 eq_dwp_loaded_cutus (const void *a
, const void *b
)
13034 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
13035 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
13037 return dua
->signature
== dub
->signature
;
13040 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
13043 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
13045 return htab_create_alloc_ex (3,
13046 hash_dwp_loaded_cutus
,
13047 eq_dwp_loaded_cutus
,
13049 &objfile
->objfile_obstack
,
13050 hashtab_obstack_allocate
,
13051 dummy_obstack_deallocate
);
13054 /* Try to open DWP file FILE_NAME.
13055 The result is the bfd handle of the file.
13056 If there is a problem finding or opening the file, return NULL.
13057 Upon success, the canonicalized path of the file is stored in the bfd,
13058 same as symfile_bfd_open. */
13060 static gdb_bfd_ref_ptr
13061 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
13062 const char *file_name
)
13064 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
13066 1 /*search_cwd*/));
13070 /* Work around upstream bug 15652.
13071 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
13072 [Whether that's a "bug" is debatable, but it is getting in our way.]
13073 We have no real idea where the dwp file is, because gdb's realpath-ing
13074 of the executable's path may have discarded the needed info.
13075 [IWBN if the dwp file name was recorded in the executable, akin to
13076 .gnu_debuglink, but that doesn't exist yet.]
13077 Strip the directory from FILE_NAME and search again. */
13078 if (*debug_file_directory
!= '\0')
13080 /* Don't implicitly search the current directory here.
13081 If the user wants to search "." to handle this case,
13082 it must be added to debug-file-directory. */
13083 return try_open_dwop_file (dwarf2_per_objfile
,
13084 lbasename (file_name
), 1 /*is_dwp*/,
13091 /* Initialize the use of the DWP file for the current objfile.
13092 By convention the name of the DWP file is ${objfile}.dwp.
13093 The result is NULL if it can't be found. */
13095 static struct dwp_file
*
13096 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13098 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13099 struct dwp_file
*dwp_file
;
13101 /* Try to find first .dwp for the binary file before any symbolic links
13104 /* If the objfile is a debug file, find the name of the real binary
13105 file and get the name of dwp file from there. */
13106 std::string dwp_name
;
13107 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
13109 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
13110 const char *backlink_basename
= lbasename (backlink
->original_name
);
13112 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
13115 dwp_name
= objfile
->original_name
;
13117 dwp_name
+= ".dwp";
13119 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
13121 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
13123 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
13124 dwp_name
= objfile_name (objfile
);
13125 dwp_name
+= ".dwp";
13126 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
13131 if (dwarf_read_debug
)
13132 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
13135 dwp_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_file
);
13136 dwp_file
->name
= bfd_get_filename (dbfd
.get ());
13137 dwp_file
->dbfd
= dbfd
.release ();
13139 /* +1: section 0 is unused */
13140 dwp_file
->num_sections
= bfd_count_sections (dwp_file
->dbfd
) + 1;
13141 dwp_file
->elf_sections
=
13142 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
13143 dwp_file
->num_sections
, asection
*);
13145 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_common_dwp_sections
,
13148 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
, 0);
13150 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
, 1);
13152 /* The DWP file version is stored in the hash table. Oh well. */
13153 if (dwp_file
->cus
&& dwp_file
->tus
13154 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
13156 /* Technically speaking, we should try to limp along, but this is
13157 pretty bizarre. We use pulongest here because that's the established
13158 portability solution (e.g, we cannot use %u for uint32_t). */
13159 error (_("Dwarf Error: DWP file CU version %s doesn't match"
13160 " TU version %s [in DWP file %s]"),
13161 pulongest (dwp_file
->cus
->version
),
13162 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
13166 dwp_file
->version
= dwp_file
->cus
->version
;
13167 else if (dwp_file
->tus
)
13168 dwp_file
->version
= dwp_file
->tus
->version
;
13170 dwp_file
->version
= 2;
13172 if (dwp_file
->version
== 2)
13173 bfd_map_over_sections (dwp_file
->dbfd
, dwarf2_locate_v2_dwp_sections
,
13176 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
13177 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
13179 if (dwarf_read_debug
)
13181 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
13182 fprintf_unfiltered (gdb_stdlog
,
13183 " %s CUs, %s TUs\n",
13184 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
13185 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
13191 /* Wrapper around open_and_init_dwp_file, only open it once. */
13193 static struct dwp_file
*
13194 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13196 if (! dwarf2_per_objfile
->dwp_checked
)
13198 dwarf2_per_objfile
->dwp_file
13199 = open_and_init_dwp_file (dwarf2_per_objfile
);
13200 dwarf2_per_objfile
->dwp_checked
= 1;
13202 return dwarf2_per_objfile
->dwp_file
;
13205 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
13206 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
13207 or in the DWP file for the objfile, referenced by THIS_UNIT.
13208 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
13209 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
13211 This is called, for example, when wanting to read a variable with a
13212 complex location. Therefore we don't want to do file i/o for every call.
13213 Therefore we don't want to look for a DWO file on every call.
13214 Therefore we first see if we've already seen SIGNATURE in a DWP file,
13215 then we check if we've already seen DWO_NAME, and only THEN do we check
13218 The result is a pointer to the dwo_unit object or NULL if we didn't find it
13219 (dwo_id mismatch or couldn't find the DWO/DWP file). */
13221 static struct dwo_unit
*
13222 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
13223 const char *dwo_name
, const char *comp_dir
,
13224 ULONGEST signature
, int is_debug_types
)
13226 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
13227 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13228 const char *kind
= is_debug_types
? "TU" : "CU";
13229 void **dwo_file_slot
;
13230 struct dwo_file
*dwo_file
;
13231 struct dwp_file
*dwp_file
;
13233 /* First see if there's a DWP file.
13234 If we have a DWP file but didn't find the DWO inside it, don't
13235 look for the original DWO file. It makes gdb behave differently
13236 depending on whether one is debugging in the build tree. */
13238 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
13239 if (dwp_file
!= NULL
)
13241 const struct dwp_hash_table
*dwp_htab
=
13242 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
13244 if (dwp_htab
!= NULL
)
13246 struct dwo_unit
*dwo_cutu
=
13247 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
13248 signature
, is_debug_types
);
13250 if (dwo_cutu
!= NULL
)
13252 if (dwarf_read_debug
)
13254 fprintf_unfiltered (gdb_stdlog
,
13255 "Virtual DWO %s %s found: @%s\n",
13256 kind
, hex_string (signature
),
13257 host_address_to_string (dwo_cutu
));
13265 /* No DWP file, look for the DWO file. */
13267 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
13268 dwo_name
, comp_dir
);
13269 if (*dwo_file_slot
== NULL
)
13271 /* Read in the file and build a table of the CUs/TUs it contains. */
13272 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
13274 /* NOTE: This will be NULL if unable to open the file. */
13275 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
13277 if (dwo_file
!= NULL
)
13279 struct dwo_unit
*dwo_cutu
= NULL
;
13281 if (is_debug_types
&& dwo_file
->tus
)
13283 struct dwo_unit find_dwo_cutu
;
13285 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13286 find_dwo_cutu
.signature
= signature
;
13288 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
13290 else if (!is_debug_types
&& dwo_file
->cus
)
13292 struct dwo_unit find_dwo_cutu
;
13294 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13295 find_dwo_cutu
.signature
= signature
;
13296 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
13300 if (dwo_cutu
!= NULL
)
13302 if (dwarf_read_debug
)
13304 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
13305 kind
, dwo_name
, hex_string (signature
),
13306 host_address_to_string (dwo_cutu
));
13313 /* We didn't find it. This could mean a dwo_id mismatch, or
13314 someone deleted the DWO/DWP file, or the search path isn't set up
13315 correctly to find the file. */
13317 if (dwarf_read_debug
)
13319 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
13320 kind
, dwo_name
, hex_string (signature
));
13323 /* This is a warning and not a complaint because it can be caused by
13324 pilot error (e.g., user accidentally deleting the DWO). */
13326 /* Print the name of the DWP file if we looked there, helps the user
13327 better diagnose the problem. */
13328 std::string dwp_text
;
13330 if (dwp_file
!= NULL
)
13331 dwp_text
= string_printf (" [in DWP file %s]",
13332 lbasename (dwp_file
->name
));
13334 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
13335 " [in module %s]"),
13336 kind
, dwo_name
, hex_string (signature
),
13338 this_unit
->is_debug_types
? "TU" : "CU",
13339 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
13344 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
13345 See lookup_dwo_cutu_unit for details. */
13347 static struct dwo_unit
*
13348 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
13349 const char *dwo_name
, const char *comp_dir
,
13350 ULONGEST signature
)
13352 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
13355 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
13356 See lookup_dwo_cutu_unit for details. */
13358 static struct dwo_unit
*
13359 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
13360 const char *dwo_name
, const char *comp_dir
)
13362 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
13365 /* Traversal function for queue_and_load_all_dwo_tus. */
13368 queue_and_load_dwo_tu (void **slot
, void *info
)
13370 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
13371 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
13372 ULONGEST signature
= dwo_unit
->signature
;
13373 struct signatured_type
*sig_type
=
13374 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
13376 if (sig_type
!= NULL
)
13378 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
13380 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
13381 a real dependency of PER_CU on SIG_TYPE. That is detected later
13382 while processing PER_CU. */
13383 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
13384 load_full_type_unit (sig_cu
);
13385 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
13391 /* Queue all TUs contained in the DWO of PER_CU to be read in.
13392 The DWO may have the only definition of the type, though it may not be
13393 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
13394 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
13397 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
13399 struct dwo_unit
*dwo_unit
;
13400 struct dwo_file
*dwo_file
;
13402 gdb_assert (!per_cu
->is_debug_types
);
13403 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
13404 gdb_assert (per_cu
->cu
!= NULL
);
13406 dwo_unit
= per_cu
->cu
->dwo_unit
;
13407 gdb_assert (dwo_unit
!= NULL
);
13409 dwo_file
= dwo_unit
->dwo_file
;
13410 if (dwo_file
->tus
!= NULL
)
13411 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
13414 /* Free all resources associated with DWO_FILE.
13415 Close the DWO file and munmap the sections. */
13418 free_dwo_file (struct dwo_file
*dwo_file
)
13420 /* Note: dbfd is NULL for virtual DWO files. */
13421 gdb_bfd_unref (dwo_file
->dbfd
);
13423 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
13426 /* Traversal function for free_dwo_files. */
13429 free_dwo_file_from_slot (void **slot
, void *info
)
13431 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
13433 free_dwo_file (dwo_file
);
13438 /* Free all resources associated with DWO_FILES. */
13441 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
13443 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
13446 /* Read in various DIEs. */
13448 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
13449 Inherit only the children of the DW_AT_abstract_origin DIE not being
13450 already referenced by DW_AT_abstract_origin from the children of the
13454 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
13456 struct die_info
*child_die
;
13457 sect_offset
*offsetp
;
13458 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
13459 struct die_info
*origin_die
;
13460 /* Iterator of the ORIGIN_DIE children. */
13461 struct die_info
*origin_child_die
;
13462 struct attribute
*attr
;
13463 struct dwarf2_cu
*origin_cu
;
13464 struct pending
**origin_previous_list_in_scope
;
13466 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13470 /* Note that following die references may follow to a die in a
13474 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
13476 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
13478 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
13479 origin_cu
->list_in_scope
= cu
->list_in_scope
;
13481 if (die
->tag
!= origin_die
->tag
13482 && !(die
->tag
== DW_TAG_inlined_subroutine
13483 && origin_die
->tag
== DW_TAG_subprogram
))
13484 complaint (&symfile_complaints
,
13485 _("DIE %s and its abstract origin %s have different tags"),
13486 sect_offset_str (die
->sect_off
),
13487 sect_offset_str (origin_die
->sect_off
));
13489 std::vector
<sect_offset
> offsets
;
13491 for (child_die
= die
->child
;
13492 child_die
&& child_die
->tag
;
13493 child_die
= sibling_die (child_die
))
13495 struct die_info
*child_origin_die
;
13496 struct dwarf2_cu
*child_origin_cu
;
13498 /* We are trying to process concrete instance entries:
13499 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
13500 it's not relevant to our analysis here. i.e. detecting DIEs that are
13501 present in the abstract instance but not referenced in the concrete
13503 if (child_die
->tag
== DW_TAG_call_site
13504 || child_die
->tag
== DW_TAG_GNU_call_site
)
13507 /* For each CHILD_DIE, find the corresponding child of
13508 ORIGIN_DIE. If there is more than one layer of
13509 DW_AT_abstract_origin, follow them all; there shouldn't be,
13510 but GCC versions at least through 4.4 generate this (GCC PR
13512 child_origin_die
= child_die
;
13513 child_origin_cu
= cu
;
13516 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
13520 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
13524 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
13525 counterpart may exist. */
13526 if (child_origin_die
!= child_die
)
13528 if (child_die
->tag
!= child_origin_die
->tag
13529 && !(child_die
->tag
== DW_TAG_inlined_subroutine
13530 && child_origin_die
->tag
== DW_TAG_subprogram
))
13531 complaint (&symfile_complaints
,
13532 _("Child DIE %s and its abstract origin %s have "
13534 sect_offset_str (child_die
->sect_off
),
13535 sect_offset_str (child_origin_die
->sect_off
));
13536 if (child_origin_die
->parent
!= origin_die
)
13537 complaint (&symfile_complaints
,
13538 _("Child DIE %s and its abstract origin %s have "
13539 "different parents"),
13540 sect_offset_str (child_die
->sect_off
),
13541 sect_offset_str (child_origin_die
->sect_off
));
13543 offsets
.push_back (child_origin_die
->sect_off
);
13546 std::sort (offsets
.begin (), offsets
.end ());
13547 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
13548 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
13549 if (offsetp
[-1] == *offsetp
)
13550 complaint (&symfile_complaints
,
13551 _("Multiple children of DIE %s refer "
13552 "to DIE %s as their abstract origin"),
13553 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
13555 offsetp
= offsets
.data ();
13556 origin_child_die
= origin_die
->child
;
13557 while (origin_child_die
&& origin_child_die
->tag
)
13559 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13560 while (offsetp
< offsets_end
13561 && *offsetp
< origin_child_die
->sect_off
)
13563 if (offsetp
>= offsets_end
13564 || *offsetp
> origin_child_die
->sect_off
)
13566 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13567 Check whether we're already processing ORIGIN_CHILD_DIE.
13568 This can happen with mutually referenced abstract_origins.
13570 if (!origin_child_die
->in_process
)
13571 process_die (origin_child_die
, origin_cu
);
13573 origin_child_die
= sibling_die (origin_child_die
);
13575 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13579 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13581 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13582 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13583 struct context_stack
*newobj
;
13586 struct die_info
*child_die
;
13587 struct attribute
*attr
, *call_line
, *call_file
;
13589 CORE_ADDR baseaddr
;
13590 struct block
*block
;
13591 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13592 std::vector
<struct symbol
*> template_args
;
13593 struct template_symbol
*templ_func
= NULL
;
13597 /* If we do not have call site information, we can't show the
13598 caller of this inlined function. That's too confusing, so
13599 only use the scope for local variables. */
13600 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13601 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13602 if (call_line
== NULL
|| call_file
== NULL
)
13604 read_lexical_block_scope (die
, cu
);
13609 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13611 name
= dwarf2_name (die
, cu
);
13613 /* Ignore functions with missing or empty names. These are actually
13614 illegal according to the DWARF standard. */
13617 complaint (&symfile_complaints
,
13618 _("missing name for subprogram DIE at %s"),
13619 sect_offset_str (die
->sect_off
));
13623 /* Ignore functions with missing or invalid low and high pc attributes. */
13624 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13625 <= PC_BOUNDS_INVALID
)
13627 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13628 if (!attr
|| !DW_UNSND (attr
))
13629 complaint (&symfile_complaints
,
13630 _("cannot get low and high bounds "
13631 "for subprogram DIE at %s"),
13632 sect_offset_str (die
->sect_off
));
13636 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13637 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13639 /* If we have any template arguments, then we must allocate a
13640 different sort of symbol. */
13641 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
13643 if (child_die
->tag
== DW_TAG_template_type_param
13644 || child_die
->tag
== DW_TAG_template_value_param
)
13646 templ_func
= allocate_template_symbol (objfile
);
13647 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13652 newobj
= push_context (0, lowpc
);
13653 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13654 (struct symbol
*) templ_func
);
13656 /* If there is a location expression for DW_AT_frame_base, record
13658 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13660 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13662 /* If there is a location for the static link, record it. */
13663 newobj
->static_link
= NULL
;
13664 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13667 newobj
->static_link
13668 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13669 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
13672 cu
->list_in_scope
= &local_symbols
;
13674 if (die
->child
!= NULL
)
13676 child_die
= die
->child
;
13677 while (child_die
&& child_die
->tag
)
13679 if (child_die
->tag
== DW_TAG_template_type_param
13680 || child_die
->tag
== DW_TAG_template_value_param
)
13682 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13685 template_args
.push_back (arg
);
13688 process_die (child_die
, cu
);
13689 child_die
= sibling_die (child_die
);
13693 inherit_abstract_dies (die
, cu
);
13695 /* If we have a DW_AT_specification, we might need to import using
13696 directives from the context of the specification DIE. See the
13697 comment in determine_prefix. */
13698 if (cu
->language
== language_cplus
13699 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13701 struct dwarf2_cu
*spec_cu
= cu
;
13702 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13706 child_die
= spec_die
->child
;
13707 while (child_die
&& child_die
->tag
)
13709 if (child_die
->tag
== DW_TAG_imported_module
)
13710 process_die (child_die
, spec_cu
);
13711 child_die
= sibling_die (child_die
);
13714 /* In some cases, GCC generates specification DIEs that
13715 themselves contain DW_AT_specification attributes. */
13716 spec_die
= die_specification (spec_die
, &spec_cu
);
13720 newobj
= pop_context ();
13721 /* Make a block for the local symbols within. */
13722 block
= finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
13723 newobj
->static_link
, lowpc
, highpc
);
13725 /* For C++, set the block's scope. */
13726 if ((cu
->language
== language_cplus
13727 || cu
->language
== language_fortran
13728 || cu
->language
== language_d
13729 || cu
->language
== language_rust
)
13730 && cu
->processing_has_namespace_info
)
13731 block_set_scope (block
, determine_prefix (die
, cu
),
13732 &objfile
->objfile_obstack
);
13734 /* If we have address ranges, record them. */
13735 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13737 gdbarch_make_symbol_special (gdbarch
, newobj
->name
, objfile
);
13739 /* Attach template arguments to function. */
13740 if (!template_args
.empty ())
13742 gdb_assert (templ_func
!= NULL
);
13744 templ_func
->n_template_arguments
= template_args
.size ();
13745 templ_func
->template_arguments
13746 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13747 templ_func
->n_template_arguments
);
13748 memcpy (templ_func
->template_arguments
,
13749 template_args
.data (),
13750 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13753 /* In C++, we can have functions nested inside functions (e.g., when
13754 a function declares a class that has methods). This means that
13755 when we finish processing a function scope, we may need to go
13756 back to building a containing block's symbol lists. */
13757 local_symbols
= newobj
->locals
;
13758 local_using_directives
= newobj
->local_using_directives
;
13760 /* If we've finished processing a top-level function, subsequent
13761 symbols go in the file symbol list. */
13762 if (outermost_context_p ())
13763 cu
->list_in_scope
= &file_symbols
;
13766 /* Process all the DIES contained within a lexical block scope. Start
13767 a new scope, process the dies, and then close the scope. */
13770 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13772 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13773 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13774 struct context_stack
*newobj
;
13775 CORE_ADDR lowpc
, highpc
;
13776 struct die_info
*child_die
;
13777 CORE_ADDR baseaddr
;
13779 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13781 /* Ignore blocks with missing or invalid low and high pc attributes. */
13782 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13783 as multiple lexical blocks? Handling children in a sane way would
13784 be nasty. Might be easier to properly extend generic blocks to
13785 describe ranges. */
13786 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13788 case PC_BOUNDS_NOT_PRESENT
:
13789 /* DW_TAG_lexical_block has no attributes, process its children as if
13790 there was no wrapping by that DW_TAG_lexical_block.
13791 GCC does no longer produces such DWARF since GCC r224161. */
13792 for (child_die
= die
->child
;
13793 child_die
!= NULL
&& child_die
->tag
;
13794 child_die
= sibling_die (child_die
))
13795 process_die (child_die
, cu
);
13797 case PC_BOUNDS_INVALID
:
13800 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13801 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13803 push_context (0, lowpc
);
13804 if (die
->child
!= NULL
)
13806 child_die
= die
->child
;
13807 while (child_die
&& child_die
->tag
)
13809 process_die (child_die
, cu
);
13810 child_die
= sibling_die (child_die
);
13813 inherit_abstract_dies (die
, cu
);
13814 newobj
= pop_context ();
13816 if (local_symbols
!= NULL
|| local_using_directives
!= NULL
)
13818 struct block
*block
13819 = finish_block (0, &local_symbols
, newobj
->old_blocks
, NULL
,
13820 newobj
->start_addr
, highpc
);
13822 /* Note that recording ranges after traversing children, as we
13823 do here, means that recording a parent's ranges entails
13824 walking across all its children's ranges as they appear in
13825 the address map, which is quadratic behavior.
13827 It would be nicer to record the parent's ranges before
13828 traversing its children, simply overriding whatever you find
13829 there. But since we don't even decide whether to create a
13830 block until after we've traversed its children, that's hard
13832 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13834 local_symbols
= newobj
->locals
;
13835 local_using_directives
= newobj
->local_using_directives
;
13838 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13841 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13843 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13844 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13845 CORE_ADDR pc
, baseaddr
;
13846 struct attribute
*attr
;
13847 struct call_site
*call_site
, call_site_local
;
13850 struct die_info
*child_die
;
13852 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13854 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13857 /* This was a pre-DWARF-5 GNU extension alias
13858 for DW_AT_call_return_pc. */
13859 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13863 complaint (&symfile_complaints
,
13864 _("missing DW_AT_call_return_pc for DW_TAG_call_site "
13865 "DIE %s [in module %s]"),
13866 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13869 pc
= attr_value_as_address (attr
) + baseaddr
;
13870 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13872 if (cu
->call_site_htab
== NULL
)
13873 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13874 NULL
, &objfile
->objfile_obstack
,
13875 hashtab_obstack_allocate
, NULL
);
13876 call_site_local
.pc
= pc
;
13877 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13880 complaint (&symfile_complaints
,
13881 _("Duplicate PC %s for DW_TAG_call_site "
13882 "DIE %s [in module %s]"),
13883 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13884 objfile_name (objfile
));
13888 /* Count parameters at the caller. */
13891 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13892 child_die
= sibling_die (child_die
))
13894 if (child_die
->tag
!= DW_TAG_call_site_parameter
13895 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13897 complaint (&symfile_complaints
,
13898 _("Tag %d is not DW_TAG_call_site_parameter in "
13899 "DW_TAG_call_site child DIE %s [in module %s]"),
13900 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13901 objfile_name (objfile
));
13909 = ((struct call_site
*)
13910 obstack_alloc (&objfile
->objfile_obstack
,
13911 sizeof (*call_site
)
13912 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
13914 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
13915 call_site
->pc
= pc
;
13917 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
13918 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
13920 struct die_info
*func_die
;
13922 /* Skip also over DW_TAG_inlined_subroutine. */
13923 for (func_die
= die
->parent
;
13924 func_die
&& func_die
->tag
!= DW_TAG_subprogram
13925 && func_die
->tag
!= DW_TAG_subroutine_type
;
13926 func_die
= func_die
->parent
);
13928 /* DW_AT_call_all_calls is a superset
13929 of DW_AT_call_all_tail_calls. */
13931 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
13932 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
13933 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
13934 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
13936 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
13937 not complete. But keep CALL_SITE for look ups via call_site_htab,
13938 both the initial caller containing the real return address PC and
13939 the final callee containing the current PC of a chain of tail
13940 calls do not need to have the tail call list complete. But any
13941 function candidate for a virtual tail call frame searched via
13942 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
13943 determined unambiguously. */
13947 struct type
*func_type
= NULL
;
13950 func_type
= get_die_type (func_die
, cu
);
13951 if (func_type
!= NULL
)
13953 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
13955 /* Enlist this call site to the function. */
13956 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
13957 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
13960 complaint (&symfile_complaints
,
13961 _("Cannot find function owning DW_TAG_call_site "
13962 "DIE %s [in module %s]"),
13963 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13967 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
13969 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
13971 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
13974 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
13975 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13977 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
13978 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
13979 /* Keep NULL DWARF_BLOCK. */;
13980 else if (attr_form_is_block (attr
))
13982 struct dwarf2_locexpr_baton
*dlbaton
;
13984 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
13985 dlbaton
->data
= DW_BLOCK (attr
)->data
;
13986 dlbaton
->size
= DW_BLOCK (attr
)->size
;
13987 dlbaton
->per_cu
= cu
->per_cu
;
13989 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
13991 else if (attr_form_is_ref (attr
))
13993 struct dwarf2_cu
*target_cu
= cu
;
13994 struct die_info
*target_die
;
13996 target_die
= follow_die_ref (die
, attr
, &target_cu
);
13997 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
13998 if (die_is_declaration (target_die
, target_cu
))
14000 const char *target_physname
;
14002 /* Prefer the mangled name; otherwise compute the demangled one. */
14003 target_physname
= dw2_linkage_name (target_die
, target_cu
);
14004 if (target_physname
== NULL
)
14005 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
14006 if (target_physname
== NULL
)
14007 complaint (&symfile_complaints
,
14008 _("DW_AT_call_target target DIE has invalid "
14009 "physname, for referencing DIE %s [in module %s]"),
14010 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14012 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
14018 /* DW_AT_entry_pc should be preferred. */
14019 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
14020 <= PC_BOUNDS_INVALID
)
14021 complaint (&symfile_complaints
,
14022 _("DW_AT_call_target target DIE has invalid "
14023 "low pc, for referencing DIE %s [in module %s]"),
14024 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14027 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
14028 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
14033 complaint (&symfile_complaints
,
14034 _("DW_TAG_call_site DW_AT_call_target is neither "
14035 "block nor reference, for DIE %s [in module %s]"),
14036 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14038 call_site
->per_cu
= cu
->per_cu
;
14040 for (child_die
= die
->child
;
14041 child_die
&& child_die
->tag
;
14042 child_die
= sibling_die (child_die
))
14044 struct call_site_parameter
*parameter
;
14045 struct attribute
*loc
, *origin
;
14047 if (child_die
->tag
!= DW_TAG_call_site_parameter
14048 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14050 /* Already printed the complaint above. */
14054 gdb_assert (call_site
->parameter_count
< nparams
);
14055 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
14057 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
14058 specifies DW_TAG_formal_parameter. Value of the data assumed for the
14059 register is contained in DW_AT_call_value. */
14061 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
14062 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
14063 if (origin
== NULL
)
14065 /* This was a pre-DWARF-5 GNU extension alias
14066 for DW_AT_call_parameter. */
14067 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
14069 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
14071 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
14073 sect_offset sect_off
14074 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
14075 if (!offset_in_cu_p (&cu
->header
, sect_off
))
14077 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
14078 binding can be done only inside one CU. Such referenced DIE
14079 therefore cannot be even moved to DW_TAG_partial_unit. */
14080 complaint (&symfile_complaints
,
14081 _("DW_AT_call_parameter offset is not in CU for "
14082 "DW_TAG_call_site child DIE %s [in module %s]"),
14083 sect_offset_str (child_die
->sect_off
),
14084 objfile_name (objfile
));
14087 parameter
->u
.param_cu_off
14088 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
14090 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
14092 complaint (&symfile_complaints
,
14093 _("No DW_FORM_block* DW_AT_location for "
14094 "DW_TAG_call_site child DIE %s [in module %s]"),
14095 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
14100 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
14101 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
14102 if (parameter
->u
.dwarf_reg
!= -1)
14103 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
14104 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
14105 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
14106 ¶meter
->u
.fb_offset
))
14107 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
14110 complaint (&symfile_complaints
,
14111 _("Only single DW_OP_reg or DW_OP_fbreg is supported "
14112 "for DW_FORM_block* DW_AT_location is supported for "
14113 "DW_TAG_call_site child DIE %s "
14115 sect_offset_str (child_die
->sect_off
),
14116 objfile_name (objfile
));
14121 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
14123 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
14124 if (!attr_form_is_block (attr
))
14126 complaint (&symfile_complaints
,
14127 _("No DW_FORM_block* DW_AT_call_value for "
14128 "DW_TAG_call_site child DIE %s [in module %s]"),
14129 sect_offset_str (child_die
->sect_off
),
14130 objfile_name (objfile
));
14133 parameter
->value
= DW_BLOCK (attr
)->data
;
14134 parameter
->value_size
= DW_BLOCK (attr
)->size
;
14136 /* Parameters are not pre-cleared by memset above. */
14137 parameter
->data_value
= NULL
;
14138 parameter
->data_value_size
= 0;
14139 call_site
->parameter_count
++;
14141 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
14143 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
14146 if (!attr_form_is_block (attr
))
14147 complaint (&symfile_complaints
,
14148 _("No DW_FORM_block* DW_AT_call_data_value for "
14149 "DW_TAG_call_site child DIE %s [in module %s]"),
14150 sect_offset_str (child_die
->sect_off
),
14151 objfile_name (objfile
));
14154 parameter
->data_value
= DW_BLOCK (attr
)->data
;
14155 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
14161 /* Helper function for read_variable. If DIE represents a virtual
14162 table, then return the type of the concrete object that is
14163 associated with the virtual table. Otherwise, return NULL. */
14165 static struct type
*
14166 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14168 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14172 /* Find the type DIE. */
14173 struct die_info
*type_die
= NULL
;
14174 struct dwarf2_cu
*type_cu
= cu
;
14176 if (attr_form_is_ref (attr
))
14177 type_die
= follow_die_ref (die
, attr
, &type_cu
);
14178 if (type_die
== NULL
)
14181 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
14183 return die_containing_type (type_die
, type_cu
);
14186 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
14189 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
14191 struct rust_vtable_symbol
*storage
= NULL
;
14193 if (cu
->language
== language_rust
)
14195 struct type
*containing_type
= rust_containing_type (die
, cu
);
14197 if (containing_type
!= NULL
)
14199 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14201 storage
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
14202 struct rust_vtable_symbol
);
14203 initialize_objfile_symbol (storage
);
14204 storage
->concrete_type
= containing_type
;
14205 storage
->subclass
= SYMBOL_RUST_VTABLE
;
14209 new_symbol (die
, NULL
, cu
, storage
);
14212 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
14213 reading .debug_rnglists.
14214 Callback's type should be:
14215 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14216 Return true if the attributes are present and valid, otherwise,
14219 template <typename Callback
>
14221 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
14222 Callback
&&callback
)
14224 struct dwarf2_per_objfile
*dwarf2_per_objfile
14225 = cu
->per_cu
->dwarf2_per_objfile
;
14226 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14227 bfd
*obfd
= objfile
->obfd
;
14228 /* Base address selection entry. */
14231 const gdb_byte
*buffer
;
14232 CORE_ADDR baseaddr
;
14233 bool overflow
= false;
14235 found_base
= cu
->base_known
;
14236 base
= cu
->base_address
;
14238 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
14239 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
14241 complaint (&symfile_complaints
,
14242 _("Offset %d out of bounds for DW_AT_ranges attribute"),
14246 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
14248 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14252 /* Initialize it due to a false compiler warning. */
14253 CORE_ADDR range_beginning
= 0, range_end
= 0;
14254 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
14255 + dwarf2_per_objfile
->rnglists
.size
);
14256 unsigned int bytes_read
;
14258 if (buffer
== buf_end
)
14263 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
14266 case DW_RLE_end_of_list
:
14268 case DW_RLE_base_address
:
14269 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14274 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14276 buffer
+= bytes_read
;
14278 case DW_RLE_start_length
:
14279 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14284 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14285 buffer
+= bytes_read
;
14286 range_end
= (range_beginning
14287 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
14288 buffer
+= bytes_read
;
14289 if (buffer
> buf_end
)
14295 case DW_RLE_offset_pair
:
14296 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14297 buffer
+= bytes_read
;
14298 if (buffer
> buf_end
)
14303 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14304 buffer
+= bytes_read
;
14305 if (buffer
> buf_end
)
14311 case DW_RLE_start_end
:
14312 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
14317 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14318 buffer
+= bytes_read
;
14319 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14320 buffer
+= bytes_read
;
14323 complaint (&symfile_complaints
,
14324 _("Invalid .debug_rnglists data (no base address)"));
14327 if (rlet
== DW_RLE_end_of_list
|| overflow
)
14329 if (rlet
== DW_RLE_base_address
)
14334 /* We have no valid base address for the ranges
14336 complaint (&symfile_complaints
,
14337 _("Invalid .debug_rnglists data (no base address)"));
14341 if (range_beginning
> range_end
)
14343 /* Inverted range entries are invalid. */
14344 complaint (&symfile_complaints
,
14345 _("Invalid .debug_rnglists data (inverted range)"));
14349 /* Empty range entries have no effect. */
14350 if (range_beginning
== range_end
)
14353 range_beginning
+= base
;
14356 /* A not-uncommon case of bad debug info.
14357 Don't pollute the addrmap with bad data. */
14358 if (range_beginning
+ baseaddr
== 0
14359 && !dwarf2_per_objfile
->has_section_at_zero
)
14361 complaint (&symfile_complaints
,
14362 _(".debug_rnglists entry has start address of zero"
14363 " [in module %s]"), objfile_name (objfile
));
14367 callback (range_beginning
, range_end
);
14372 complaint (&symfile_complaints
,
14373 _("Offset %d is not terminated "
14374 "for DW_AT_ranges attribute"),
14382 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
14383 Callback's type should be:
14384 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14385 Return 1 if the attributes are present and valid, otherwise, return 0. */
14387 template <typename Callback
>
14389 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
14390 Callback
&&callback
)
14392 struct dwarf2_per_objfile
*dwarf2_per_objfile
14393 = cu
->per_cu
->dwarf2_per_objfile
;
14394 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14395 struct comp_unit_head
*cu_header
= &cu
->header
;
14396 bfd
*obfd
= objfile
->obfd
;
14397 unsigned int addr_size
= cu_header
->addr_size
;
14398 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14399 /* Base address selection entry. */
14402 unsigned int dummy
;
14403 const gdb_byte
*buffer
;
14404 CORE_ADDR baseaddr
;
14406 if (cu_header
->version
>= 5)
14407 return dwarf2_rnglists_process (offset
, cu
, callback
);
14409 found_base
= cu
->base_known
;
14410 base
= cu
->base_address
;
14412 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
14413 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
14415 complaint (&symfile_complaints
,
14416 _("Offset %d out of bounds for DW_AT_ranges attribute"),
14420 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
14422 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14426 CORE_ADDR range_beginning
, range_end
;
14428 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
14429 buffer
+= addr_size
;
14430 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
14431 buffer
+= addr_size
;
14432 offset
+= 2 * addr_size
;
14434 /* An end of list marker is a pair of zero addresses. */
14435 if (range_beginning
== 0 && range_end
== 0)
14436 /* Found the end of list entry. */
14439 /* Each base address selection entry is a pair of 2 values.
14440 The first is the largest possible address, the second is
14441 the base address. Check for a base address here. */
14442 if ((range_beginning
& mask
) == mask
)
14444 /* If we found the largest possible address, then we already
14445 have the base address in range_end. */
14453 /* We have no valid base address for the ranges
14455 complaint (&symfile_complaints
,
14456 _("Invalid .debug_ranges data (no base address)"));
14460 if (range_beginning
> range_end
)
14462 /* Inverted range entries are invalid. */
14463 complaint (&symfile_complaints
,
14464 _("Invalid .debug_ranges data (inverted range)"));
14468 /* Empty range entries have no effect. */
14469 if (range_beginning
== range_end
)
14472 range_beginning
+= base
;
14475 /* A not-uncommon case of bad debug info.
14476 Don't pollute the addrmap with bad data. */
14477 if (range_beginning
+ baseaddr
== 0
14478 && !dwarf2_per_objfile
->has_section_at_zero
)
14480 complaint (&symfile_complaints
,
14481 _(".debug_ranges entry has start address of zero"
14482 " [in module %s]"), objfile_name (objfile
));
14486 callback (range_beginning
, range_end
);
14492 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
14493 Return 1 if the attributes are present and valid, otherwise, return 0.
14494 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
14497 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
14498 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
14499 struct partial_symtab
*ranges_pst
)
14501 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14502 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14503 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
14504 SECT_OFF_TEXT (objfile
));
14507 CORE_ADDR high
= 0;
14510 retval
= dwarf2_ranges_process (offset
, cu
,
14511 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
14513 if (ranges_pst
!= NULL
)
14518 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
14519 range_beginning
+ baseaddr
);
14520 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
,
14521 range_end
+ baseaddr
);
14522 addrmap_set_empty (objfile
->psymtabs_addrmap
, lowpc
, highpc
- 1,
14526 /* FIXME: This is recording everything as a low-high
14527 segment of consecutive addresses. We should have a
14528 data structure for discontiguous block ranges
14532 low
= range_beginning
;
14538 if (range_beginning
< low
)
14539 low
= range_beginning
;
14540 if (range_end
> high
)
14548 /* If the first entry is an end-of-list marker, the range
14549 describes an empty scope, i.e. no instructions. */
14555 *high_return
= high
;
14559 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14560 definition for the return value. *LOWPC and *HIGHPC are set iff
14561 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14563 static enum pc_bounds_kind
14564 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14565 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14566 struct partial_symtab
*pst
)
14568 struct dwarf2_per_objfile
*dwarf2_per_objfile
14569 = cu
->per_cu
->dwarf2_per_objfile
;
14570 struct attribute
*attr
;
14571 struct attribute
*attr_high
;
14573 CORE_ADDR high
= 0;
14574 enum pc_bounds_kind ret
;
14576 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14579 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14582 low
= attr_value_as_address (attr
);
14583 high
= attr_value_as_address (attr_high
);
14584 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14588 /* Found high w/o low attribute. */
14589 return PC_BOUNDS_INVALID
;
14591 /* Found consecutive range of addresses. */
14592 ret
= PC_BOUNDS_HIGH_LOW
;
14596 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14599 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14600 We take advantage of the fact that DW_AT_ranges does not appear
14601 in DW_TAG_compile_unit of DWO files. */
14602 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14603 unsigned int ranges_offset
= (DW_UNSND (attr
)
14604 + (need_ranges_base
14608 /* Value of the DW_AT_ranges attribute is the offset in the
14609 .debug_ranges section. */
14610 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
14611 return PC_BOUNDS_INVALID
;
14612 /* Found discontinuous range of addresses. */
14613 ret
= PC_BOUNDS_RANGES
;
14616 return PC_BOUNDS_NOT_PRESENT
;
14619 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14621 return PC_BOUNDS_INVALID
;
14623 /* When using the GNU linker, .gnu.linkonce. sections are used to
14624 eliminate duplicate copies of functions and vtables and such.
14625 The linker will arbitrarily choose one and discard the others.
14626 The AT_*_pc values for such functions refer to local labels in
14627 these sections. If the section from that file was discarded, the
14628 labels are not in the output, so the relocs get a value of 0.
14629 If this is a discarded function, mark the pc bounds as invalid,
14630 so that GDB will ignore it. */
14631 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14632 return PC_BOUNDS_INVALID
;
14640 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14641 its low and high PC addresses. Do nothing if these addresses could not
14642 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14643 and HIGHPC to the high address if greater than HIGHPC. */
14646 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14647 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14648 struct dwarf2_cu
*cu
)
14650 CORE_ADDR low
, high
;
14651 struct die_info
*child
= die
->child
;
14653 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14655 *lowpc
= std::min (*lowpc
, low
);
14656 *highpc
= std::max (*highpc
, high
);
14659 /* If the language does not allow nested subprograms (either inside
14660 subprograms or lexical blocks), we're done. */
14661 if (cu
->language
!= language_ada
)
14664 /* Check all the children of the given DIE. If it contains nested
14665 subprograms, then check their pc bounds. Likewise, we need to
14666 check lexical blocks as well, as they may also contain subprogram
14668 while (child
&& child
->tag
)
14670 if (child
->tag
== DW_TAG_subprogram
14671 || child
->tag
== DW_TAG_lexical_block
)
14672 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14673 child
= sibling_die (child
);
14677 /* Get the low and high pc's represented by the scope DIE, and store
14678 them in *LOWPC and *HIGHPC. If the correct values can't be
14679 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14682 get_scope_pc_bounds (struct die_info
*die
,
14683 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14684 struct dwarf2_cu
*cu
)
14686 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14687 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14688 CORE_ADDR current_low
, current_high
;
14690 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14691 >= PC_BOUNDS_RANGES
)
14693 best_low
= current_low
;
14694 best_high
= current_high
;
14698 struct die_info
*child
= die
->child
;
14700 while (child
&& child
->tag
)
14702 switch (child
->tag
) {
14703 case DW_TAG_subprogram
:
14704 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14706 case DW_TAG_namespace
:
14707 case DW_TAG_module
:
14708 /* FIXME: carlton/2004-01-16: Should we do this for
14709 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14710 that current GCC's always emit the DIEs corresponding
14711 to definitions of methods of classes as children of a
14712 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14713 the DIEs giving the declarations, which could be
14714 anywhere). But I don't see any reason why the
14715 standards says that they have to be there. */
14716 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14718 if (current_low
!= ((CORE_ADDR
) -1))
14720 best_low
= std::min (best_low
, current_low
);
14721 best_high
= std::max (best_high
, current_high
);
14729 child
= sibling_die (child
);
14734 *highpc
= best_high
;
14737 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14741 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14742 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14744 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14745 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14746 struct attribute
*attr
;
14747 struct attribute
*attr_high
;
14749 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14752 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14755 CORE_ADDR low
= attr_value_as_address (attr
);
14756 CORE_ADDR high
= attr_value_as_address (attr_high
);
14758 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14761 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14762 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14763 record_block_range (block
, low
, high
- 1);
14767 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14770 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14771 We take advantage of the fact that DW_AT_ranges does not appear
14772 in DW_TAG_compile_unit of DWO files. */
14773 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14775 /* The value of the DW_AT_ranges attribute is the offset of the
14776 address range list in the .debug_ranges section. */
14777 unsigned long offset
= (DW_UNSND (attr
)
14778 + (need_ranges_base
? cu
->ranges_base
: 0));
14780 dwarf2_ranges_process (offset
, cu
,
14781 [&] (CORE_ADDR start
, CORE_ADDR end
)
14785 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14786 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14787 record_block_range (block
, start
, end
- 1);
14792 /* Check whether the producer field indicates either of GCC < 4.6, or the
14793 Intel C/C++ compiler, and cache the result in CU. */
14796 check_producer (struct dwarf2_cu
*cu
)
14800 if (cu
->producer
== NULL
)
14802 /* For unknown compilers expect their behavior is DWARF version
14805 GCC started to support .debug_types sections by -gdwarf-4 since
14806 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14807 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14808 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14809 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14811 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14813 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14814 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14816 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14817 cu
->producer_is_icc_lt_14
= major
< 14;
14820 /* For other non-GCC compilers, expect their behavior is DWARF version
14824 cu
->checked_producer
= 1;
14827 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14828 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14829 during 4.6.0 experimental. */
14832 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14834 if (!cu
->checked_producer
)
14835 check_producer (cu
);
14837 return cu
->producer_is_gxx_lt_4_6
;
14840 /* Return the default accessibility type if it is not overriden by
14841 DW_AT_accessibility. */
14843 static enum dwarf_access_attribute
14844 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14846 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14848 /* The default DWARF 2 accessibility for members is public, the default
14849 accessibility for inheritance is private. */
14851 if (die
->tag
!= DW_TAG_inheritance
)
14852 return DW_ACCESS_public
;
14854 return DW_ACCESS_private
;
14858 /* DWARF 3+ defines the default accessibility a different way. The same
14859 rules apply now for DW_TAG_inheritance as for the members and it only
14860 depends on the container kind. */
14862 if (die
->parent
->tag
== DW_TAG_class_type
)
14863 return DW_ACCESS_private
;
14865 return DW_ACCESS_public
;
14869 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14870 offset. If the attribute was not found return 0, otherwise return
14871 1. If it was found but could not properly be handled, set *OFFSET
14875 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14878 struct attribute
*attr
;
14880 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
14885 /* Note that we do not check for a section offset first here.
14886 This is because DW_AT_data_member_location is new in DWARF 4,
14887 so if we see it, we can assume that a constant form is really
14888 a constant and not a section offset. */
14889 if (attr_form_is_constant (attr
))
14890 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
14891 else if (attr_form_is_section_offset (attr
))
14892 dwarf2_complex_location_expr_complaint ();
14893 else if (attr_form_is_block (attr
))
14894 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
14896 dwarf2_complex_location_expr_complaint ();
14904 /* Add an aggregate field to the field list. */
14907 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
14908 struct dwarf2_cu
*cu
)
14910 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14911 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14912 struct nextfield
*new_field
;
14913 struct attribute
*attr
;
14915 const char *fieldname
= "";
14917 if (die
->tag
== DW_TAG_inheritance
)
14919 fip
->baseclasses
.emplace_back ();
14920 new_field
= &fip
->baseclasses
.back ();
14924 fip
->fields
.emplace_back ();
14925 new_field
= &fip
->fields
.back ();
14930 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
14932 new_field
->accessibility
= DW_UNSND (attr
);
14934 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
14935 if (new_field
->accessibility
!= DW_ACCESS_public
)
14936 fip
->non_public_fields
= 1;
14938 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
14940 new_field
->virtuality
= DW_UNSND (attr
);
14942 new_field
->virtuality
= DW_VIRTUALITY_none
;
14944 fp
= &new_field
->field
;
14946 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
14950 /* Data member other than a C++ static data member. */
14952 /* Get type of field. */
14953 fp
->type
= die_type (die
, cu
);
14955 SET_FIELD_BITPOS (*fp
, 0);
14957 /* Get bit size of field (zero if none). */
14958 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
14961 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
14965 FIELD_BITSIZE (*fp
) = 0;
14968 /* Get bit offset of field. */
14969 if (handle_data_member_location (die
, cu
, &offset
))
14970 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
14971 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
14974 if (gdbarch_bits_big_endian (gdbarch
))
14976 /* For big endian bits, the DW_AT_bit_offset gives the
14977 additional bit offset from the MSB of the containing
14978 anonymous object to the MSB of the field. We don't
14979 have to do anything special since we don't need to
14980 know the size of the anonymous object. */
14981 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
14985 /* For little endian bits, compute the bit offset to the
14986 MSB of the anonymous object, subtract off the number of
14987 bits from the MSB of the field to the MSB of the
14988 object, and then subtract off the number of bits of
14989 the field itself. The result is the bit offset of
14990 the LSB of the field. */
14991 int anonymous_size
;
14992 int bit_offset
= DW_UNSND (attr
);
14994 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
14997 /* The size of the anonymous object containing
14998 the bit field is explicit, so use the
14999 indicated size (in bytes). */
15000 anonymous_size
= DW_UNSND (attr
);
15004 /* The size of the anonymous object containing
15005 the bit field must be inferred from the type
15006 attribute of the data member containing the
15008 anonymous_size
= TYPE_LENGTH (fp
->type
);
15010 SET_FIELD_BITPOS (*fp
,
15011 (FIELD_BITPOS (*fp
)
15012 + anonymous_size
* bits_per_byte
15013 - bit_offset
- FIELD_BITSIZE (*fp
)));
15016 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
15018 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
15019 + dwarf2_get_attr_constant_value (attr
, 0)));
15021 /* Get name of field. */
15022 fieldname
= dwarf2_name (die
, cu
);
15023 if (fieldname
== NULL
)
15026 /* The name is already allocated along with this objfile, so we don't
15027 need to duplicate it for the type. */
15028 fp
->name
= fieldname
;
15030 /* Change accessibility for artificial fields (e.g. virtual table
15031 pointer or virtual base class pointer) to private. */
15032 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
15034 FIELD_ARTIFICIAL (*fp
) = 1;
15035 new_field
->accessibility
= DW_ACCESS_private
;
15036 fip
->non_public_fields
= 1;
15039 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
15041 /* C++ static member. */
15043 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
15044 is a declaration, but all versions of G++ as of this writing
15045 (so through at least 3.2.1) incorrectly generate
15046 DW_TAG_variable tags. */
15048 const char *physname
;
15050 /* Get name of field. */
15051 fieldname
= dwarf2_name (die
, cu
);
15052 if (fieldname
== NULL
)
15055 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15057 /* Only create a symbol if this is an external value.
15058 new_symbol checks this and puts the value in the global symbol
15059 table, which we want. If it is not external, new_symbol
15060 will try to put the value in cu->list_in_scope which is wrong. */
15061 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
15063 /* A static const member, not much different than an enum as far as
15064 we're concerned, except that we can support more types. */
15065 new_symbol (die
, NULL
, cu
);
15068 /* Get physical name. */
15069 physname
= dwarf2_physname (fieldname
, die
, cu
);
15071 /* The name is already allocated along with this objfile, so we don't
15072 need to duplicate it for the type. */
15073 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
15074 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15075 FIELD_NAME (*fp
) = fieldname
;
15077 else if (die
->tag
== DW_TAG_inheritance
)
15081 /* C++ base class field. */
15082 if (handle_data_member_location (die
, cu
, &offset
))
15083 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15084 FIELD_BITSIZE (*fp
) = 0;
15085 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15086 FIELD_NAME (*fp
) = type_name_no_tag (fp
->type
);
15088 else if (die
->tag
== DW_TAG_variant_part
)
15090 /* process_structure_scope will treat this DIE as a union. */
15091 process_structure_scope (die
, cu
);
15093 /* The variant part is relative to the start of the enclosing
15095 SET_FIELD_BITPOS (*fp
, 0);
15096 fp
->type
= get_die_type (die
, cu
);
15097 fp
->artificial
= 1;
15098 fp
->name
= "<<variant>>";
15101 gdb_assert_not_reached ("missing case in dwarf2_add_field");
15104 /* Can the type given by DIE define another type? */
15107 type_can_define_types (const struct die_info
*die
)
15111 case DW_TAG_typedef
:
15112 case DW_TAG_class_type
:
15113 case DW_TAG_structure_type
:
15114 case DW_TAG_union_type
:
15115 case DW_TAG_enumeration_type
:
15123 /* Add a type definition defined in the scope of the FIP's class. */
15126 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
15127 struct dwarf2_cu
*cu
)
15129 struct decl_field fp
;
15130 memset (&fp
, 0, sizeof (fp
));
15132 gdb_assert (type_can_define_types (die
));
15134 /* Get name of field. NULL is okay here, meaning an anonymous type. */
15135 fp
.name
= dwarf2_name (die
, cu
);
15136 fp
.type
= read_type_die (die
, cu
);
15138 /* Save accessibility. */
15139 enum dwarf_access_attribute accessibility
;
15140 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15142 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15144 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15145 switch (accessibility
)
15147 case DW_ACCESS_public
:
15148 /* The assumed value if neither private nor protected. */
15150 case DW_ACCESS_private
:
15153 case DW_ACCESS_protected
:
15154 fp
.is_protected
= 1;
15157 complaint (&symfile_complaints
,
15158 _("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
15161 if (die
->tag
== DW_TAG_typedef
)
15162 fip
->typedef_field_list
.push_back (fp
);
15164 fip
->nested_types_list
.push_back (fp
);
15167 /* Create the vector of fields, and attach it to the type. */
15170 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
15171 struct dwarf2_cu
*cu
)
15173 int nfields
= fip
->nfields
;
15175 /* Record the field count, allocate space for the array of fields,
15176 and create blank accessibility bitfields if necessary. */
15177 TYPE_NFIELDS (type
) = nfields
;
15178 TYPE_FIELDS (type
) = (struct field
*)
15179 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
15181 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
15183 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15185 TYPE_FIELD_PRIVATE_BITS (type
) =
15186 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15187 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
15189 TYPE_FIELD_PROTECTED_BITS (type
) =
15190 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15191 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
15193 TYPE_FIELD_IGNORE_BITS (type
) =
15194 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15195 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
15198 /* If the type has baseclasses, allocate and clear a bit vector for
15199 TYPE_FIELD_VIRTUAL_BITS. */
15200 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
15202 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
15203 unsigned char *pointer
;
15205 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15206 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
15207 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
15208 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
15209 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
15212 if (TYPE_FLAG_DISCRIMINATED_UNION (type
))
15214 struct discriminant_info
*di
= alloc_discriminant_info (type
, -1, -1);
15216 for (int index
= 0; index
< nfields
; ++index
)
15218 struct nextfield
&field
= fip
->fields
[index
];
15220 if (field
.variant
.is_discriminant
)
15221 di
->discriminant_index
= index
;
15222 else if (field
.variant
.default_branch
)
15223 di
->default_index
= index
;
15225 di
->discriminants
[index
] = field
.variant
.discriminant_value
;
15229 /* Copy the saved-up fields into the field vector. */
15230 for (int i
= 0; i
< nfields
; ++i
)
15232 struct nextfield
&field
15233 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
15234 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
15236 TYPE_FIELD (type
, i
) = field
.field
;
15237 switch (field
.accessibility
)
15239 case DW_ACCESS_private
:
15240 if (cu
->language
!= language_ada
)
15241 SET_TYPE_FIELD_PRIVATE (type
, i
);
15244 case DW_ACCESS_protected
:
15245 if (cu
->language
!= language_ada
)
15246 SET_TYPE_FIELD_PROTECTED (type
, i
);
15249 case DW_ACCESS_public
:
15253 /* Unknown accessibility. Complain and treat it as public. */
15255 complaint (&symfile_complaints
, _("unsupported accessibility %d"),
15256 field
.accessibility
);
15260 if (i
< fip
->baseclasses
.size ())
15262 switch (field
.virtuality
)
15264 case DW_VIRTUALITY_virtual
:
15265 case DW_VIRTUALITY_pure_virtual
:
15266 if (cu
->language
== language_ada
)
15267 error (_("unexpected virtuality in component of Ada type"));
15268 SET_TYPE_FIELD_VIRTUAL (type
, i
);
15275 /* Return true if this member function is a constructor, false
15279 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
15281 const char *fieldname
;
15282 const char *type_name
;
15285 if (die
->parent
== NULL
)
15288 if (die
->parent
->tag
!= DW_TAG_structure_type
15289 && die
->parent
->tag
!= DW_TAG_union_type
15290 && die
->parent
->tag
!= DW_TAG_class_type
)
15293 fieldname
= dwarf2_name (die
, cu
);
15294 type_name
= dwarf2_name (die
->parent
, cu
);
15295 if (fieldname
== NULL
|| type_name
== NULL
)
15298 len
= strlen (fieldname
);
15299 return (strncmp (fieldname
, type_name
, len
) == 0
15300 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
15303 /* Add a member function to the proper fieldlist. */
15306 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15307 struct type
*type
, struct dwarf2_cu
*cu
)
15309 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15310 struct attribute
*attr
;
15312 struct fnfieldlist
*flp
= nullptr;
15313 struct fn_field
*fnp
;
15314 const char *fieldname
;
15315 struct type
*this_type
;
15316 enum dwarf_access_attribute accessibility
;
15318 if (cu
->language
== language_ada
)
15319 error (_("unexpected member function in Ada type"));
15321 /* Get name of member function. */
15322 fieldname
= dwarf2_name (die
, cu
);
15323 if (fieldname
== NULL
)
15326 /* Look up member function name in fieldlist. */
15327 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15329 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15331 flp
= &fip
->fnfieldlists
[i
];
15336 /* Create a new fnfieldlist if necessary. */
15337 if (flp
== nullptr)
15339 fip
->fnfieldlists
.emplace_back ();
15340 flp
= &fip
->fnfieldlists
.back ();
15341 flp
->name
= fieldname
;
15342 i
= fip
->fnfieldlists
.size () - 1;
15345 /* Create a new member function field and add it to the vector of
15347 flp
->fnfields
.emplace_back ();
15348 fnp
= &flp
->fnfields
.back ();
15350 /* Delay processing of the physname until later. */
15351 if (cu
->language
== language_cplus
)
15352 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15356 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15357 fnp
->physname
= physname
? physname
: "";
15360 fnp
->type
= alloc_type (objfile
);
15361 this_type
= read_type_die (die
, cu
);
15362 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
15364 int nparams
= TYPE_NFIELDS (this_type
);
15366 /* TYPE is the domain of this method, and THIS_TYPE is the type
15367 of the method itself (TYPE_CODE_METHOD). */
15368 smash_to_method_type (fnp
->type
, type
,
15369 TYPE_TARGET_TYPE (this_type
),
15370 TYPE_FIELDS (this_type
),
15371 TYPE_NFIELDS (this_type
),
15372 TYPE_VARARGS (this_type
));
15374 /* Handle static member functions.
15375 Dwarf2 has no clean way to discern C++ static and non-static
15376 member functions. G++ helps GDB by marking the first
15377 parameter for non-static member functions (which is the this
15378 pointer) as artificial. We obtain this information from
15379 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15380 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15381 fnp
->voffset
= VOFFSET_STATIC
;
15384 complaint (&symfile_complaints
, _("member function type missing for '%s'"),
15385 dwarf2_full_name (fieldname
, die
, cu
));
15387 /* Get fcontext from DW_AT_containing_type if present. */
15388 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15389 fnp
->fcontext
= die_containing_type (die
, cu
);
15391 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15392 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15394 /* Get accessibility. */
15395 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15397 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15399 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15400 switch (accessibility
)
15402 case DW_ACCESS_private
:
15403 fnp
->is_private
= 1;
15405 case DW_ACCESS_protected
:
15406 fnp
->is_protected
= 1;
15410 /* Check for artificial methods. */
15411 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15412 if (attr
&& DW_UNSND (attr
) != 0)
15413 fnp
->is_artificial
= 1;
15415 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15417 /* Get index in virtual function table if it is a virtual member
15418 function. For older versions of GCC, this is an offset in the
15419 appropriate virtual table, as specified by DW_AT_containing_type.
15420 For everyone else, it is an expression to be evaluated relative
15421 to the object address. */
15423 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15426 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
15428 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15430 /* Old-style GCC. */
15431 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15433 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15434 || (DW_BLOCK (attr
)->size
> 1
15435 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15436 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15438 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15439 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15440 dwarf2_complex_location_expr_complaint ();
15442 fnp
->voffset
/= cu
->header
.addr_size
;
15446 dwarf2_complex_location_expr_complaint ();
15448 if (!fnp
->fcontext
)
15450 /* If there is no `this' field and no DW_AT_containing_type,
15451 we cannot actually find a base class context for the
15453 if (TYPE_NFIELDS (this_type
) == 0
15454 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15456 complaint (&symfile_complaints
,
15457 _("cannot determine context for virtual member "
15458 "function \"%s\" (offset %s)"),
15459 fieldname
, sect_offset_str (die
->sect_off
));
15464 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15468 else if (attr_form_is_section_offset (attr
))
15470 dwarf2_complex_location_expr_complaint ();
15474 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15480 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15481 if (attr
&& DW_UNSND (attr
))
15483 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15484 complaint (&symfile_complaints
,
15485 _("Member function \"%s\" (offset %s) is virtual "
15486 "but the vtable offset is not specified"),
15487 fieldname
, sect_offset_str (die
->sect_off
));
15488 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15489 TYPE_CPLUS_DYNAMIC (type
) = 1;
15494 /* Create the vector of member function fields, and attach it to the type. */
15497 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15498 struct dwarf2_cu
*cu
)
15500 if (cu
->language
== language_ada
)
15501 error (_("unexpected member functions in Ada type"));
15503 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15504 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15506 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15508 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15510 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15511 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15513 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15514 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15515 fn_flp
->fn_fields
= (struct fn_field
*)
15516 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15518 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15519 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15522 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15525 /* Returns non-zero if NAME is the name of a vtable member in CU's
15526 language, zero otherwise. */
15528 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15530 static const char vptr
[] = "_vptr";
15532 /* Look for the C++ form of the vtable. */
15533 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15539 /* GCC outputs unnamed structures that are really pointers to member
15540 functions, with the ABI-specified layout. If TYPE describes
15541 such a structure, smash it into a member function type.
15543 GCC shouldn't do this; it should just output pointer to member DIEs.
15544 This is GCC PR debug/28767. */
15547 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15549 struct type
*pfn_type
, *self_type
, *new_type
;
15551 /* Check for a structure with no name and two children. */
15552 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15555 /* Check for __pfn and __delta members. */
15556 if (TYPE_FIELD_NAME (type
, 0) == NULL
15557 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15558 || TYPE_FIELD_NAME (type
, 1) == NULL
15559 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15562 /* Find the type of the method. */
15563 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15564 if (pfn_type
== NULL
15565 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15566 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15569 /* Look for the "this" argument. */
15570 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15571 if (TYPE_NFIELDS (pfn_type
) == 0
15572 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15573 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15576 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15577 new_type
= alloc_type (objfile
);
15578 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15579 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15580 TYPE_VARARGS (pfn_type
));
15581 smash_to_methodptr_type (type
, new_type
);
15584 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15585 appropriate error checking and issuing complaints if there is a
15589 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15591 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15593 if (attr
== nullptr)
15596 if (!attr_form_is_constant (attr
))
15598 complaint (&symfile_complaints
,
15599 _("DW_AT_alignment must have constant form"
15600 " - DIE at %s [in module %s]"),
15601 sect_offset_str (die
->sect_off
),
15602 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15607 if (attr
->form
== DW_FORM_sdata
)
15609 LONGEST val
= DW_SND (attr
);
15612 complaint (&symfile_complaints
,
15613 _("DW_AT_alignment value must not be negative"
15614 " - DIE at %s [in module %s]"),
15615 sect_offset_str (die
->sect_off
),
15616 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15622 align
= DW_UNSND (attr
);
15626 complaint (&symfile_complaints
,
15627 _("DW_AT_alignment value must not be zero"
15628 " - DIE at %s [in module %s]"),
15629 sect_offset_str (die
->sect_off
),
15630 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15633 if ((align
& (align
- 1)) != 0)
15635 complaint (&symfile_complaints
,
15636 _("DW_AT_alignment value must be a power of 2"
15637 " - DIE at %s [in module %s]"),
15638 sect_offset_str (die
->sect_off
),
15639 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15646 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15647 the alignment for TYPE. */
15650 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15653 if (!set_type_align (type
, get_alignment (cu
, die
)))
15654 complaint (&symfile_complaints
,
15655 _("DW_AT_alignment value too large"
15656 " - DIE at %s [in module %s]"),
15657 sect_offset_str (die
->sect_off
),
15658 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15661 /* Called when we find the DIE that starts a structure or union scope
15662 (definition) to create a type for the structure or union. Fill in
15663 the type's name and general properties; the members will not be
15664 processed until process_structure_scope. A symbol table entry for
15665 the type will also not be done until process_structure_scope (assuming
15666 the type has a name).
15668 NOTE: we need to call these functions regardless of whether or not the
15669 DIE has a DW_AT_name attribute, since it might be an anonymous
15670 structure or union. This gets the type entered into our set of
15671 user defined types. */
15673 static struct type
*
15674 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15676 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15678 struct attribute
*attr
;
15681 /* If the definition of this type lives in .debug_types, read that type.
15682 Don't follow DW_AT_specification though, that will take us back up
15683 the chain and we want to go down. */
15684 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
15687 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15689 /* The type's CU may not be the same as CU.
15690 Ensure TYPE is recorded with CU in die_type_hash. */
15691 return set_die_type (die
, type
, cu
);
15694 type
= alloc_type (objfile
);
15695 INIT_CPLUS_SPECIFIC (type
);
15697 name
= dwarf2_name (die
, cu
);
15700 if (cu
->language
== language_cplus
15701 || cu
->language
== language_d
15702 || cu
->language
== language_rust
)
15704 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15706 /* dwarf2_full_name might have already finished building the DIE's
15707 type. If so, there is no need to continue. */
15708 if (get_die_type (die
, cu
) != NULL
)
15709 return get_die_type (die
, cu
);
15711 TYPE_TAG_NAME (type
) = full_name
;
15712 if (die
->tag
== DW_TAG_structure_type
15713 || die
->tag
== DW_TAG_class_type
)
15714 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
15718 /* The name is already allocated along with this objfile, so
15719 we don't need to duplicate it for the type. */
15720 TYPE_TAG_NAME (type
) = name
;
15721 if (die
->tag
== DW_TAG_class_type
)
15722 TYPE_NAME (type
) = TYPE_TAG_NAME (type
);
15726 if (die
->tag
== DW_TAG_structure_type
)
15728 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15730 else if (die
->tag
== DW_TAG_union_type
)
15732 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15734 else if (die
->tag
== DW_TAG_variant_part
)
15736 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15737 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
15741 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15744 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15745 TYPE_DECLARED_CLASS (type
) = 1;
15747 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15750 if (attr_form_is_constant (attr
))
15751 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15754 /* For the moment, dynamic type sizes are not supported
15755 by GDB's struct type. The actual size is determined
15756 on-demand when resolving the type of a given object,
15757 so set the type's length to zero for now. Otherwise,
15758 we record an expression as the length, and that expression
15759 could lead to a very large value, which could eventually
15760 lead to us trying to allocate that much memory when creating
15761 a value of that type. */
15762 TYPE_LENGTH (type
) = 0;
15767 TYPE_LENGTH (type
) = 0;
15770 maybe_set_alignment (cu
, die
, type
);
15772 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15774 /* ICC<14 does not output the required DW_AT_declaration on
15775 incomplete types, but gives them a size of zero. */
15776 TYPE_STUB (type
) = 1;
15779 TYPE_STUB_SUPPORTED (type
) = 1;
15781 if (die_is_declaration (die
, cu
))
15782 TYPE_STUB (type
) = 1;
15783 else if (attr
== NULL
&& die
->child
== NULL
15784 && producer_is_realview (cu
->producer
))
15785 /* RealView does not output the required DW_AT_declaration
15786 on incomplete types. */
15787 TYPE_STUB (type
) = 1;
15789 /* We need to add the type field to the die immediately so we don't
15790 infinitely recurse when dealing with pointers to the structure
15791 type within the structure itself. */
15792 set_die_type (die
, type
, cu
);
15794 /* set_die_type should be already done. */
15795 set_descriptive_type (type
, die
, cu
);
15800 /* A helper for process_structure_scope that handles a single member
15804 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15805 struct field_info
*fi
,
15806 std::vector
<struct symbol
*> *template_args
,
15807 struct dwarf2_cu
*cu
)
15809 if (child_die
->tag
== DW_TAG_member
15810 || child_die
->tag
== DW_TAG_variable
15811 || child_die
->tag
== DW_TAG_variant_part
)
15813 /* NOTE: carlton/2002-11-05: A C++ static data member
15814 should be a DW_TAG_member that is a declaration, but
15815 all versions of G++ as of this writing (so through at
15816 least 3.2.1) incorrectly generate DW_TAG_variable
15817 tags for them instead. */
15818 dwarf2_add_field (fi
, child_die
, cu
);
15820 else if (child_die
->tag
== DW_TAG_subprogram
)
15822 /* Rust doesn't have member functions in the C++ sense.
15823 However, it does emit ordinary functions as children
15824 of a struct DIE. */
15825 if (cu
->language
== language_rust
)
15826 read_func_scope (child_die
, cu
);
15829 /* C++ member function. */
15830 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15833 else if (child_die
->tag
== DW_TAG_inheritance
)
15835 /* C++ base class field. */
15836 dwarf2_add_field (fi
, child_die
, cu
);
15838 else if (type_can_define_types (child_die
))
15839 dwarf2_add_type_defn (fi
, child_die
, cu
);
15840 else if (child_die
->tag
== DW_TAG_template_type_param
15841 || child_die
->tag
== DW_TAG_template_value_param
)
15843 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15846 template_args
->push_back (arg
);
15848 else if (child_die
->tag
== DW_TAG_variant
)
15850 /* In a variant we want to get the discriminant and also add a
15851 field for our sole member child. */
15852 struct attribute
*discr
= dwarf2_attr (child_die
, DW_AT_discr_value
, cu
);
15854 for (struct die_info
*variant_child
= child_die
->child
;
15855 variant_child
!= NULL
;
15856 variant_child
= sibling_die (variant_child
))
15858 if (variant_child
->tag
== DW_TAG_member
)
15860 handle_struct_member_die (variant_child
, type
, fi
,
15861 template_args
, cu
);
15862 /* Only handle the one. */
15867 /* We don't handle this but we might as well report it if we see
15869 if (dwarf2_attr (child_die
, DW_AT_discr_list
, cu
) != nullptr)
15870 complaint (&symfile_complaints
,
15871 _("DW_AT_discr_list is not supported yet"
15872 " - DIE at %s [in module %s]"),
15873 sect_offset_str (child_die
->sect_off
),
15874 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15876 /* The first field was just added, so we can stash the
15877 discriminant there. */
15878 gdb_assert (!fi
->fields
.empty ());
15880 fi
->fields
.back ().variant
.default_branch
= true;
15882 fi
->fields
.back ().variant
.discriminant_value
= DW_UNSND (discr
);
15886 /* Finish creating a structure or union type, including filling in
15887 its members and creating a symbol for it. */
15890 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
15892 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15893 struct die_info
*child_die
;
15896 type
= get_die_type (die
, cu
);
15898 type
= read_structure_type (die
, cu
);
15900 /* When reading a DW_TAG_variant_part, we need to notice when we
15901 read the discriminant member, so we can record it later in the
15902 discriminant_info. */
15903 bool is_variant_part
= TYPE_FLAG_DISCRIMINATED_UNION (type
);
15904 sect_offset discr_offset
;
15906 if (is_variant_part
)
15908 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
15911 /* Maybe it's a univariant form, an extension we support.
15912 In this case arrange not to check the offset. */
15913 is_variant_part
= false;
15915 else if (attr_form_is_ref (discr
))
15917 struct dwarf2_cu
*target_cu
= cu
;
15918 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
15920 discr_offset
= target_die
->sect_off
;
15924 complaint (&symfile_complaints
,
15925 _("DW_AT_discr does not have DIE reference form"
15926 " - DIE at %s [in module %s]"),
15927 sect_offset_str (die
->sect_off
),
15928 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15929 is_variant_part
= false;
15933 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
15935 struct field_info fi
;
15936 std::vector
<struct symbol
*> template_args
;
15938 child_die
= die
->child
;
15940 while (child_die
&& child_die
->tag
)
15942 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
15944 if (is_variant_part
&& discr_offset
== child_die
->sect_off
)
15945 fi
.fields
.back ().variant
.is_discriminant
= true;
15947 child_die
= sibling_die (child_die
);
15950 /* Attach template arguments to type. */
15951 if (!template_args
.empty ())
15953 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15954 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
15955 TYPE_TEMPLATE_ARGUMENTS (type
)
15956 = XOBNEWVEC (&objfile
->objfile_obstack
,
15958 TYPE_N_TEMPLATE_ARGUMENTS (type
));
15959 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
15960 template_args
.data (),
15961 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
15962 * sizeof (struct symbol
*)));
15965 /* Attach fields and member functions to the type. */
15967 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
15968 if (!fi
.fnfieldlists
.empty ())
15970 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
15972 /* Get the type which refers to the base class (possibly this
15973 class itself) which contains the vtable pointer for the current
15974 class from the DW_AT_containing_type attribute. This use of
15975 DW_AT_containing_type is a GNU extension. */
15977 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15979 struct type
*t
= die_containing_type (die
, cu
);
15981 set_type_vptr_basetype (type
, t
);
15986 /* Our own class provides vtbl ptr. */
15987 for (i
= TYPE_NFIELDS (t
) - 1;
15988 i
>= TYPE_N_BASECLASSES (t
);
15991 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
15993 if (is_vtable_name (fieldname
, cu
))
15995 set_type_vptr_fieldno (type
, i
);
16000 /* Complain if virtual function table field not found. */
16001 if (i
< TYPE_N_BASECLASSES (t
))
16002 complaint (&symfile_complaints
,
16003 _("virtual function table pointer "
16004 "not found when defining class '%s'"),
16005 TYPE_TAG_NAME (type
) ? TYPE_TAG_NAME (type
) :
16010 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
16013 else if (cu
->producer
16014 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
16016 /* The IBM XLC compiler does not provide direct indication
16017 of the containing type, but the vtable pointer is
16018 always named __vfp. */
16022 for (i
= TYPE_NFIELDS (type
) - 1;
16023 i
>= TYPE_N_BASECLASSES (type
);
16026 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
16028 set_type_vptr_fieldno (type
, i
);
16029 set_type_vptr_basetype (type
, type
);
16036 /* Copy fi.typedef_field_list linked list elements content into the
16037 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
16038 if (!fi
.typedef_field_list
.empty ())
16040 int count
= fi
.typedef_field_list
.size ();
16042 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16043 TYPE_TYPEDEF_FIELD_ARRAY (type
)
16044 = ((struct decl_field
*)
16046 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
16047 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
16049 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
16050 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
16053 /* Copy fi.nested_types_list linked list elements content into the
16054 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
16055 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
16057 int count
= fi
.nested_types_list
.size ();
16059 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16060 TYPE_NESTED_TYPES_ARRAY (type
)
16061 = ((struct decl_field
*)
16062 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
16063 TYPE_NESTED_TYPES_COUNT (type
) = count
;
16065 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
16066 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
16070 quirk_gcc_member_function_pointer (type
, objfile
);
16071 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
16072 cu
->rust_unions
.push_back (type
);
16074 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
16075 snapshots) has been known to create a die giving a declaration
16076 for a class that has, as a child, a die giving a definition for a
16077 nested class. So we have to process our children even if the
16078 current die is a declaration. Normally, of course, a declaration
16079 won't have any children at all. */
16081 child_die
= die
->child
;
16083 while (child_die
!= NULL
&& child_die
->tag
)
16085 if (child_die
->tag
== DW_TAG_member
16086 || child_die
->tag
== DW_TAG_variable
16087 || child_die
->tag
== DW_TAG_inheritance
16088 || child_die
->tag
== DW_TAG_template_value_param
16089 || child_die
->tag
== DW_TAG_template_type_param
)
16094 process_die (child_die
, cu
);
16096 child_die
= sibling_die (child_die
);
16099 /* Do not consider external references. According to the DWARF standard,
16100 these DIEs are identified by the fact that they have no byte_size
16101 attribute, and a declaration attribute. */
16102 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
16103 || !die_is_declaration (die
, cu
))
16104 new_symbol (die
, type
, cu
);
16107 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
16108 update TYPE using some information only available in DIE's children. */
16111 update_enumeration_type_from_children (struct die_info
*die
,
16113 struct dwarf2_cu
*cu
)
16115 struct die_info
*child_die
;
16116 int unsigned_enum
= 1;
16120 auto_obstack obstack
;
16122 for (child_die
= die
->child
;
16123 child_die
!= NULL
&& child_die
->tag
;
16124 child_die
= sibling_die (child_die
))
16126 struct attribute
*attr
;
16128 const gdb_byte
*bytes
;
16129 struct dwarf2_locexpr_baton
*baton
;
16132 if (child_die
->tag
!= DW_TAG_enumerator
)
16135 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
16139 name
= dwarf2_name (child_die
, cu
);
16141 name
= "<anonymous enumerator>";
16143 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
16144 &value
, &bytes
, &baton
);
16150 else if ((mask
& value
) != 0)
16155 /* If we already know that the enum type is neither unsigned, nor
16156 a flag type, no need to look at the rest of the enumerates. */
16157 if (!unsigned_enum
&& !flag_enum
)
16162 TYPE_UNSIGNED (type
) = 1;
16164 TYPE_FLAG_ENUM (type
) = 1;
16167 /* Given a DW_AT_enumeration_type die, set its type. We do not
16168 complete the type's fields yet, or create any symbols. */
16170 static struct type
*
16171 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16173 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16175 struct attribute
*attr
;
16178 /* If the definition of this type lives in .debug_types, read that type.
16179 Don't follow DW_AT_specification though, that will take us back up
16180 the chain and we want to go down. */
16181 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
16184 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16186 /* The type's CU may not be the same as CU.
16187 Ensure TYPE is recorded with CU in die_type_hash. */
16188 return set_die_type (die
, type
, cu
);
16191 type
= alloc_type (objfile
);
16193 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
16194 name
= dwarf2_full_name (NULL
, die
, cu
);
16196 TYPE_TAG_NAME (type
) = name
;
16198 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16201 struct type
*underlying_type
= die_type (die
, cu
);
16203 TYPE_TARGET_TYPE (type
) = underlying_type
;
16206 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16209 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16213 TYPE_LENGTH (type
) = 0;
16216 maybe_set_alignment (cu
, die
, type
);
16218 /* The enumeration DIE can be incomplete. In Ada, any type can be
16219 declared as private in the package spec, and then defined only
16220 inside the package body. Such types are known as Taft Amendment
16221 Types. When another package uses such a type, an incomplete DIE
16222 may be generated by the compiler. */
16223 if (die_is_declaration (die
, cu
))
16224 TYPE_STUB (type
) = 1;
16226 /* Finish the creation of this type by using the enum's children.
16227 We must call this even when the underlying type has been provided
16228 so that we can determine if we're looking at a "flag" enum. */
16229 update_enumeration_type_from_children (die
, type
, cu
);
16231 /* If this type has an underlying type that is not a stub, then we
16232 may use its attributes. We always use the "unsigned" attribute
16233 in this situation, because ordinarily we guess whether the type
16234 is unsigned -- but the guess can be wrong and the underlying type
16235 can tell us the reality. However, we defer to a local size
16236 attribute if one exists, because this lets the compiler override
16237 the underlying type if needed. */
16238 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16240 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
16241 if (TYPE_LENGTH (type
) == 0)
16242 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
16243 if (TYPE_RAW_ALIGN (type
) == 0
16244 && TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)) != 0)
16245 set_type_align (type
, TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)));
16248 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16250 return set_die_type (die
, type
, cu
);
16253 /* Given a pointer to a die which begins an enumeration, process all
16254 the dies that define the members of the enumeration, and create the
16255 symbol for the enumeration type.
16257 NOTE: We reverse the order of the element list. */
16260 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16262 struct type
*this_type
;
16264 this_type
= get_die_type (die
, cu
);
16265 if (this_type
== NULL
)
16266 this_type
= read_enumeration_type (die
, cu
);
16268 if (die
->child
!= NULL
)
16270 struct die_info
*child_die
;
16271 struct symbol
*sym
;
16272 struct field
*fields
= NULL
;
16273 int num_fields
= 0;
16276 child_die
= die
->child
;
16277 while (child_die
&& child_die
->tag
)
16279 if (child_die
->tag
!= DW_TAG_enumerator
)
16281 process_die (child_die
, cu
);
16285 name
= dwarf2_name (child_die
, cu
);
16288 sym
= new_symbol (child_die
, this_type
, cu
);
16290 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
16292 fields
= (struct field
*)
16294 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
16295 * sizeof (struct field
));
16298 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
16299 FIELD_TYPE (fields
[num_fields
]) = NULL
;
16300 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
16301 FIELD_BITSIZE (fields
[num_fields
]) = 0;
16307 child_die
= sibling_die (child_die
);
16312 TYPE_NFIELDS (this_type
) = num_fields
;
16313 TYPE_FIELDS (this_type
) = (struct field
*)
16314 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
16315 memcpy (TYPE_FIELDS (this_type
), fields
,
16316 sizeof (struct field
) * num_fields
);
16321 /* If we are reading an enum from a .debug_types unit, and the enum
16322 is a declaration, and the enum is not the signatured type in the
16323 unit, then we do not want to add a symbol for it. Adding a
16324 symbol would in some cases obscure the true definition of the
16325 enum, giving users an incomplete type when the definition is
16326 actually available. Note that we do not want to do this for all
16327 enums which are just declarations, because C++0x allows forward
16328 enum declarations. */
16329 if (cu
->per_cu
->is_debug_types
16330 && die_is_declaration (die
, cu
))
16332 struct signatured_type
*sig_type
;
16334 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16335 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16336 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16340 new_symbol (die
, this_type
, cu
);
16343 /* Extract all information from a DW_TAG_array_type DIE and put it in
16344 the DIE's type field. For now, this only handles one dimensional
16347 static struct type
*
16348 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16350 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16351 struct die_info
*child_die
;
16353 struct type
*element_type
, *range_type
, *index_type
;
16354 struct attribute
*attr
;
16356 struct dynamic_prop
*byte_stride_prop
= NULL
;
16357 unsigned int bit_stride
= 0;
16359 element_type
= die_type (die
, cu
);
16361 /* The die_type call above may have already set the type for this DIE. */
16362 type
= get_die_type (die
, cu
);
16366 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16372 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16373 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
);
16376 complaint (&symfile_complaints
,
16377 _("unable to read array DW_AT_byte_stride "
16378 " - DIE at %s [in module %s]"),
16379 sect_offset_str (die
->sect_off
),
16380 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16381 /* Ignore this attribute. We will likely not be able to print
16382 arrays of this type correctly, but there is little we can do
16383 to help if we cannot read the attribute's value. */
16384 byte_stride_prop
= NULL
;
16388 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16390 bit_stride
= DW_UNSND (attr
);
16392 /* Irix 6.2 native cc creates array types without children for
16393 arrays with unspecified length. */
16394 if (die
->child
== NULL
)
16396 index_type
= objfile_type (objfile
)->builtin_int
;
16397 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16398 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16399 byte_stride_prop
, bit_stride
);
16400 return set_die_type (die
, type
, cu
);
16403 std::vector
<struct type
*> range_types
;
16404 child_die
= die
->child
;
16405 while (child_die
&& child_die
->tag
)
16407 if (child_die
->tag
== DW_TAG_subrange_type
)
16409 struct type
*child_type
= read_type_die (child_die
, cu
);
16411 if (child_type
!= NULL
)
16413 /* The range type was succesfully read. Save it for the
16414 array type creation. */
16415 range_types
.push_back (child_type
);
16418 child_die
= sibling_die (child_die
);
16421 /* Dwarf2 dimensions are output from left to right, create the
16422 necessary array types in backwards order. */
16424 type
= element_type
;
16426 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16430 while (i
< range_types
.size ())
16431 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16432 byte_stride_prop
, bit_stride
);
16436 size_t ndim
= range_types
.size ();
16438 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16439 byte_stride_prop
, bit_stride
);
16442 /* Understand Dwarf2 support for vector types (like they occur on
16443 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16444 array type. This is not part of the Dwarf2/3 standard yet, but a
16445 custom vendor extension. The main difference between a regular
16446 array and the vector variant is that vectors are passed by value
16448 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16450 make_vector_type (type
);
16452 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16453 implementation may choose to implement triple vectors using this
16455 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16458 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16459 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16461 complaint (&symfile_complaints
,
16462 _("DW_AT_byte_size for array type smaller "
16463 "than the total size of elements"));
16466 name
= dwarf2_name (die
, cu
);
16468 TYPE_NAME (type
) = name
;
16470 maybe_set_alignment (cu
, die
, type
);
16472 /* Install the type in the die. */
16473 set_die_type (die
, type
, cu
);
16475 /* set_die_type should be already done. */
16476 set_descriptive_type (type
, die
, cu
);
16481 static enum dwarf_array_dim_ordering
16482 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16484 struct attribute
*attr
;
16486 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16489 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16491 /* GNU F77 is a special case, as at 08/2004 array type info is the
16492 opposite order to the dwarf2 specification, but data is still
16493 laid out as per normal fortran.
16495 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16496 version checking. */
16498 if (cu
->language
== language_fortran
16499 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16501 return DW_ORD_row_major
;
16504 switch (cu
->language_defn
->la_array_ordering
)
16506 case array_column_major
:
16507 return DW_ORD_col_major
;
16508 case array_row_major
:
16510 return DW_ORD_row_major
;
16514 /* Extract all information from a DW_TAG_set_type DIE and put it in
16515 the DIE's type field. */
16517 static struct type
*
16518 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16520 struct type
*domain_type
, *set_type
;
16521 struct attribute
*attr
;
16523 domain_type
= die_type (die
, cu
);
16525 /* The die_type call above may have already set the type for this DIE. */
16526 set_type
= get_die_type (die
, cu
);
16530 set_type
= create_set_type (NULL
, domain_type
);
16532 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16534 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16536 maybe_set_alignment (cu
, die
, set_type
);
16538 return set_die_type (die
, set_type
, cu
);
16541 /* A helper for read_common_block that creates a locexpr baton.
16542 SYM is the symbol which we are marking as computed.
16543 COMMON_DIE is the DIE for the common block.
16544 COMMON_LOC is the location expression attribute for the common
16546 MEMBER_LOC is the location expression attribute for the particular
16547 member of the common block that we are processing.
16548 CU is the CU from which the above come. */
16551 mark_common_block_symbol_computed (struct symbol
*sym
,
16552 struct die_info
*common_die
,
16553 struct attribute
*common_loc
,
16554 struct attribute
*member_loc
,
16555 struct dwarf2_cu
*cu
)
16557 struct dwarf2_per_objfile
*dwarf2_per_objfile
16558 = cu
->per_cu
->dwarf2_per_objfile
;
16559 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16560 struct dwarf2_locexpr_baton
*baton
;
16562 unsigned int cu_off
;
16563 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
16564 LONGEST offset
= 0;
16566 gdb_assert (common_loc
&& member_loc
);
16567 gdb_assert (attr_form_is_block (common_loc
));
16568 gdb_assert (attr_form_is_block (member_loc
)
16569 || attr_form_is_constant (member_loc
));
16571 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16572 baton
->per_cu
= cu
->per_cu
;
16573 gdb_assert (baton
->per_cu
);
16575 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16577 if (attr_form_is_constant (member_loc
))
16579 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
16580 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16583 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16585 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16588 *ptr
++ = DW_OP_call4
;
16589 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16590 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16593 if (attr_form_is_constant (member_loc
))
16595 *ptr
++ = DW_OP_addr
;
16596 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16597 ptr
+= cu
->header
.addr_size
;
16601 /* We have to copy the data here, because DW_OP_call4 will only
16602 use a DW_AT_location attribute. */
16603 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16604 ptr
+= DW_BLOCK (member_loc
)->size
;
16607 *ptr
++ = DW_OP_plus
;
16608 gdb_assert (ptr
- baton
->data
== baton
->size
);
16610 SYMBOL_LOCATION_BATON (sym
) = baton
;
16611 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16614 /* Create appropriate locally-scoped variables for all the
16615 DW_TAG_common_block entries. Also create a struct common_block
16616 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16617 is used to sepate the common blocks name namespace from regular
16621 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16623 struct attribute
*attr
;
16625 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16628 /* Support the .debug_loc offsets. */
16629 if (attr_form_is_block (attr
))
16633 else if (attr_form_is_section_offset (attr
))
16635 dwarf2_complex_location_expr_complaint ();
16640 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16641 "common block member");
16646 if (die
->child
!= NULL
)
16648 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16649 struct die_info
*child_die
;
16650 size_t n_entries
= 0, size
;
16651 struct common_block
*common_block
;
16652 struct symbol
*sym
;
16654 for (child_die
= die
->child
;
16655 child_die
&& child_die
->tag
;
16656 child_die
= sibling_die (child_die
))
16659 size
= (sizeof (struct common_block
)
16660 + (n_entries
- 1) * sizeof (struct symbol
*));
16662 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16664 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16665 common_block
->n_entries
= 0;
16667 for (child_die
= die
->child
;
16668 child_die
&& child_die
->tag
;
16669 child_die
= sibling_die (child_die
))
16671 /* Create the symbol in the DW_TAG_common_block block in the current
16673 sym
= new_symbol (child_die
, NULL
, cu
);
16676 struct attribute
*member_loc
;
16678 common_block
->contents
[common_block
->n_entries
++] = sym
;
16680 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16684 /* GDB has handled this for a long time, but it is
16685 not specified by DWARF. It seems to have been
16686 emitted by gfortran at least as recently as:
16687 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16688 complaint (&symfile_complaints
,
16689 _("Variable in common block has "
16690 "DW_AT_data_member_location "
16691 "- DIE at %s [in module %s]"),
16692 sect_offset_str (child_die
->sect_off
),
16693 objfile_name (objfile
));
16695 if (attr_form_is_section_offset (member_loc
))
16696 dwarf2_complex_location_expr_complaint ();
16697 else if (attr_form_is_constant (member_loc
)
16698 || attr_form_is_block (member_loc
))
16701 mark_common_block_symbol_computed (sym
, die
, attr
,
16705 dwarf2_complex_location_expr_complaint ();
16710 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16711 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16715 /* Create a type for a C++ namespace. */
16717 static struct type
*
16718 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16720 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16721 const char *previous_prefix
, *name
;
16725 /* For extensions, reuse the type of the original namespace. */
16726 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16728 struct die_info
*ext_die
;
16729 struct dwarf2_cu
*ext_cu
= cu
;
16731 ext_die
= dwarf2_extension (die
, &ext_cu
);
16732 type
= read_type_die (ext_die
, ext_cu
);
16734 /* EXT_CU may not be the same as CU.
16735 Ensure TYPE is recorded with CU in die_type_hash. */
16736 return set_die_type (die
, type
, cu
);
16739 name
= namespace_name (die
, &is_anonymous
, cu
);
16741 /* Now build the name of the current namespace. */
16743 previous_prefix
= determine_prefix (die
, cu
);
16744 if (previous_prefix
[0] != '\0')
16745 name
= typename_concat (&objfile
->objfile_obstack
,
16746 previous_prefix
, name
, 0, cu
);
16748 /* Create the type. */
16749 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16750 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
16752 return set_die_type (die
, type
, cu
);
16755 /* Read a namespace scope. */
16758 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16760 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16763 /* Add a symbol associated to this if we haven't seen the namespace
16764 before. Also, add a using directive if it's an anonymous
16767 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16771 type
= read_type_die (die
, cu
);
16772 new_symbol (die
, type
, cu
);
16774 namespace_name (die
, &is_anonymous
, cu
);
16777 const char *previous_prefix
= determine_prefix (die
, cu
);
16779 std::vector
<const char *> excludes
;
16780 add_using_directive (using_directives (cu
->language
),
16781 previous_prefix
, TYPE_NAME (type
), NULL
,
16782 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16786 if (die
->child
!= NULL
)
16788 struct die_info
*child_die
= die
->child
;
16790 while (child_die
&& child_die
->tag
)
16792 process_die (child_die
, cu
);
16793 child_die
= sibling_die (child_die
);
16798 /* Read a Fortran module as type. This DIE can be only a declaration used for
16799 imported module. Still we need that type as local Fortran "use ... only"
16800 declaration imports depend on the created type in determine_prefix. */
16802 static struct type
*
16803 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16805 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16806 const char *module_name
;
16809 module_name
= dwarf2_name (die
, cu
);
16811 complaint (&symfile_complaints
,
16812 _("DW_TAG_module has no name, offset %s"),
16813 sect_offset_str (die
->sect_off
));
16814 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16816 /* determine_prefix uses TYPE_TAG_NAME. */
16817 TYPE_TAG_NAME (type
) = TYPE_NAME (type
);
16819 return set_die_type (die
, type
, cu
);
16822 /* Read a Fortran module. */
16825 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16827 struct die_info
*child_die
= die
->child
;
16830 type
= read_type_die (die
, cu
);
16831 new_symbol (die
, type
, cu
);
16833 while (child_die
&& child_die
->tag
)
16835 process_die (child_die
, cu
);
16836 child_die
= sibling_die (child_die
);
16840 /* Return the name of the namespace represented by DIE. Set
16841 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16844 static const char *
16845 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16847 struct die_info
*current_die
;
16848 const char *name
= NULL
;
16850 /* Loop through the extensions until we find a name. */
16852 for (current_die
= die
;
16853 current_die
!= NULL
;
16854 current_die
= dwarf2_extension (die
, &cu
))
16856 /* We don't use dwarf2_name here so that we can detect the absence
16857 of a name -> anonymous namespace. */
16858 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
16864 /* Is it an anonymous namespace? */
16866 *is_anonymous
= (name
== NULL
);
16868 name
= CP_ANONYMOUS_NAMESPACE_STR
;
16873 /* Extract all information from a DW_TAG_pointer_type DIE and add to
16874 the user defined type vector. */
16876 static struct type
*
16877 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16879 struct gdbarch
*gdbarch
16880 = get_objfile_arch (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16881 struct comp_unit_head
*cu_header
= &cu
->header
;
16883 struct attribute
*attr_byte_size
;
16884 struct attribute
*attr_address_class
;
16885 int byte_size
, addr_class
;
16886 struct type
*target_type
;
16888 target_type
= die_type (die
, cu
);
16890 /* The die_type call above may have already set the type for this DIE. */
16891 type
= get_die_type (die
, cu
);
16895 type
= lookup_pointer_type (target_type
);
16897 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16898 if (attr_byte_size
)
16899 byte_size
= DW_UNSND (attr_byte_size
);
16901 byte_size
= cu_header
->addr_size
;
16903 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
16904 if (attr_address_class
)
16905 addr_class
= DW_UNSND (attr_address_class
);
16907 addr_class
= DW_ADDR_none
;
16909 ULONGEST alignment
= get_alignment (cu
, die
);
16911 /* If the pointer size, alignment, or address class is different
16912 than the default, create a type variant marked as such and set
16913 the length accordingly. */
16914 if (TYPE_LENGTH (type
) != byte_size
16915 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
16916 && alignment
!= TYPE_RAW_ALIGN (type
))
16917 || addr_class
!= DW_ADDR_none
)
16919 if (gdbarch_address_class_type_flags_p (gdbarch
))
16923 type_flags
= gdbarch_address_class_type_flags
16924 (gdbarch
, byte_size
, addr_class
);
16925 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
16927 type
= make_type_with_address_space (type
, type_flags
);
16929 else if (TYPE_LENGTH (type
) != byte_size
)
16931 complaint (&symfile_complaints
,
16932 _("invalid pointer size %d"), byte_size
);
16934 else if (TYPE_RAW_ALIGN (type
) != alignment
)
16936 complaint (&symfile_complaints
,
16937 _("Invalid DW_AT_alignment"
16938 " - DIE at %s [in module %s]"),
16939 sect_offset_str (die
->sect_off
),
16940 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16944 /* Should we also complain about unhandled address classes? */
16948 TYPE_LENGTH (type
) = byte_size
;
16949 set_type_align (type
, alignment
);
16950 return set_die_type (die
, type
, cu
);
16953 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
16954 the user defined type vector. */
16956 static struct type
*
16957 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16960 struct type
*to_type
;
16961 struct type
*domain
;
16963 to_type
= die_type (die
, cu
);
16964 domain
= die_containing_type (die
, cu
);
16966 /* The calls above may have already set the type for this DIE. */
16967 type
= get_die_type (die
, cu
);
16971 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
16972 type
= lookup_methodptr_type (to_type
);
16973 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
16975 struct type
*new_type
16976 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
16978 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
16979 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
16980 TYPE_VARARGS (to_type
));
16981 type
= lookup_methodptr_type (new_type
);
16984 type
= lookup_memberptr_type (to_type
, domain
);
16986 return set_die_type (die
, type
, cu
);
16989 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
16990 the user defined type vector. */
16992 static struct type
*
16993 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
16994 enum type_code refcode
)
16996 struct comp_unit_head
*cu_header
= &cu
->header
;
16997 struct type
*type
, *target_type
;
16998 struct attribute
*attr
;
17000 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
17002 target_type
= die_type (die
, cu
);
17004 /* The die_type call above may have already set the type for this DIE. */
17005 type
= get_die_type (die
, cu
);
17009 type
= lookup_reference_type (target_type
, refcode
);
17010 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17013 TYPE_LENGTH (type
) = DW_UNSND (attr
);
17017 TYPE_LENGTH (type
) = cu_header
->addr_size
;
17019 maybe_set_alignment (cu
, die
, type
);
17020 return set_die_type (die
, type
, cu
);
17023 /* Add the given cv-qualifiers to the element type of the array. GCC
17024 outputs DWARF type qualifiers that apply to an array, not the
17025 element type. But GDB relies on the array element type to carry
17026 the cv-qualifiers. This mimics section 6.7.3 of the C99
17029 static struct type
*
17030 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17031 struct type
*base_type
, int cnst
, int voltl
)
17033 struct type
*el_type
, *inner_array
;
17035 base_type
= copy_type (base_type
);
17036 inner_array
= base_type
;
17038 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
17040 TYPE_TARGET_TYPE (inner_array
) =
17041 copy_type (TYPE_TARGET_TYPE (inner_array
));
17042 inner_array
= TYPE_TARGET_TYPE (inner_array
);
17045 el_type
= TYPE_TARGET_TYPE (inner_array
);
17046 cnst
|= TYPE_CONST (el_type
);
17047 voltl
|= TYPE_VOLATILE (el_type
);
17048 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
17050 return set_die_type (die
, base_type
, cu
);
17053 static struct type
*
17054 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17056 struct type
*base_type
, *cv_type
;
17058 base_type
= die_type (die
, cu
);
17060 /* The die_type call above may have already set the type for this DIE. */
17061 cv_type
= get_die_type (die
, cu
);
17065 /* In case the const qualifier is applied to an array type, the element type
17066 is so qualified, not the array type (section 6.7.3 of C99). */
17067 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17068 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
17070 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
17071 return set_die_type (die
, cv_type
, cu
);
17074 static struct type
*
17075 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17077 struct type
*base_type
, *cv_type
;
17079 base_type
= die_type (die
, cu
);
17081 /* The die_type call above may have already set the type for this DIE. */
17082 cv_type
= get_die_type (die
, cu
);
17086 /* In case the volatile qualifier is applied to an array type, the
17087 element type is so qualified, not the array type (section 6.7.3
17089 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17090 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
17092 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
17093 return set_die_type (die
, cv_type
, cu
);
17096 /* Handle DW_TAG_restrict_type. */
17098 static struct type
*
17099 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17101 struct type
*base_type
, *cv_type
;
17103 base_type
= die_type (die
, cu
);
17105 /* The die_type call above may have already set the type for this DIE. */
17106 cv_type
= get_die_type (die
, cu
);
17110 cv_type
= make_restrict_type (base_type
);
17111 return set_die_type (die
, cv_type
, cu
);
17114 /* Handle DW_TAG_atomic_type. */
17116 static struct type
*
17117 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17119 struct type
*base_type
, *cv_type
;
17121 base_type
= die_type (die
, cu
);
17123 /* The die_type call above may have already set the type for this DIE. */
17124 cv_type
= get_die_type (die
, cu
);
17128 cv_type
= make_atomic_type (base_type
);
17129 return set_die_type (die
, cv_type
, cu
);
17132 /* Extract all information from a DW_TAG_string_type DIE and add to
17133 the user defined type vector. It isn't really a user defined type,
17134 but it behaves like one, with other DIE's using an AT_user_def_type
17135 attribute to reference it. */
17137 static struct type
*
17138 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17140 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17141 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17142 struct type
*type
, *range_type
, *index_type
, *char_type
;
17143 struct attribute
*attr
;
17144 unsigned int length
;
17146 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
17149 length
= DW_UNSND (attr
);
17153 /* Check for the DW_AT_byte_size attribute. */
17154 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17157 length
= DW_UNSND (attr
);
17165 index_type
= objfile_type (objfile
)->builtin_int
;
17166 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17167 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
17168 type
= create_string_type (NULL
, char_type
, range_type
);
17170 return set_die_type (die
, type
, cu
);
17173 /* Assuming that DIE corresponds to a function, returns nonzero
17174 if the function is prototyped. */
17177 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
17179 struct attribute
*attr
;
17181 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
17182 if (attr
&& (DW_UNSND (attr
) != 0))
17185 /* The DWARF standard implies that the DW_AT_prototyped attribute
17186 is only meaninful for C, but the concept also extends to other
17187 languages that allow unprototyped functions (Eg: Objective C).
17188 For all other languages, assume that functions are always
17190 if (cu
->language
!= language_c
17191 && cu
->language
!= language_objc
17192 && cu
->language
!= language_opencl
)
17195 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17196 prototyped and unprototyped functions; default to prototyped,
17197 since that is more common in modern code (and RealView warns
17198 about unprototyped functions). */
17199 if (producer_is_realview (cu
->producer
))
17205 /* Handle DIES due to C code like:
17209 int (*funcp)(int a, long l);
17213 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17215 static struct type
*
17216 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17218 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17219 struct type
*type
; /* Type that this function returns. */
17220 struct type
*ftype
; /* Function that returns above type. */
17221 struct attribute
*attr
;
17223 type
= die_type (die
, cu
);
17225 /* The die_type call above may have already set the type for this DIE. */
17226 ftype
= get_die_type (die
, cu
);
17230 ftype
= lookup_function_type (type
);
17232 if (prototyped_function_p (die
, cu
))
17233 TYPE_PROTOTYPED (ftype
) = 1;
17235 /* Store the calling convention in the type if it's available in
17236 the subroutine die. Otherwise set the calling convention to
17237 the default value DW_CC_normal. */
17238 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17240 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
17241 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17242 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17244 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17246 /* Record whether the function returns normally to its caller or not
17247 if the DWARF producer set that information. */
17248 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17249 if (attr
&& (DW_UNSND (attr
) != 0))
17250 TYPE_NO_RETURN (ftype
) = 1;
17252 /* We need to add the subroutine type to the die immediately so
17253 we don't infinitely recurse when dealing with parameters
17254 declared as the same subroutine type. */
17255 set_die_type (die
, ftype
, cu
);
17257 if (die
->child
!= NULL
)
17259 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17260 struct die_info
*child_die
;
17261 int nparams
, iparams
;
17263 /* Count the number of parameters.
17264 FIXME: GDB currently ignores vararg functions, but knows about
17265 vararg member functions. */
17267 child_die
= die
->child
;
17268 while (child_die
&& child_die
->tag
)
17270 if (child_die
->tag
== DW_TAG_formal_parameter
)
17272 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17273 TYPE_VARARGS (ftype
) = 1;
17274 child_die
= sibling_die (child_die
);
17277 /* Allocate storage for parameters and fill them in. */
17278 TYPE_NFIELDS (ftype
) = nparams
;
17279 TYPE_FIELDS (ftype
) = (struct field
*)
17280 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
17282 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17283 even if we error out during the parameters reading below. */
17284 for (iparams
= 0; iparams
< nparams
; iparams
++)
17285 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17288 child_die
= die
->child
;
17289 while (child_die
&& child_die
->tag
)
17291 if (child_die
->tag
== DW_TAG_formal_parameter
)
17293 struct type
*arg_type
;
17295 /* DWARF version 2 has no clean way to discern C++
17296 static and non-static member functions. G++ helps
17297 GDB by marking the first parameter for non-static
17298 member functions (which is the this pointer) as
17299 artificial. We pass this information to
17300 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17302 DWARF version 3 added DW_AT_object_pointer, which GCC
17303 4.5 does not yet generate. */
17304 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17306 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17308 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17309 arg_type
= die_type (child_die
, cu
);
17311 /* RealView does not mark THIS as const, which the testsuite
17312 expects. GCC marks THIS as const in method definitions,
17313 but not in the class specifications (GCC PR 43053). */
17314 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17315 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17318 struct dwarf2_cu
*arg_cu
= cu
;
17319 const char *name
= dwarf2_name (child_die
, cu
);
17321 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17324 /* If the compiler emits this, use it. */
17325 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17328 else if (name
&& strcmp (name
, "this") == 0)
17329 /* Function definitions will have the argument names. */
17331 else if (name
== NULL
&& iparams
== 0)
17332 /* Declarations may not have the names, so like
17333 elsewhere in GDB, assume an artificial first
17334 argument is "this". */
17338 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17342 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17345 child_die
= sibling_die (child_die
);
17352 static struct type
*
17353 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17355 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17356 const char *name
= NULL
;
17357 struct type
*this_type
, *target_type
;
17359 name
= dwarf2_full_name (NULL
, die
, cu
);
17360 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17361 TYPE_TARGET_STUB (this_type
) = 1;
17362 set_die_type (die
, this_type
, cu
);
17363 target_type
= die_type (die
, cu
);
17364 if (target_type
!= this_type
)
17365 TYPE_TARGET_TYPE (this_type
) = target_type
;
17368 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17369 spec and cause infinite loops in GDB. */
17370 complaint (&symfile_complaints
,
17371 _("Self-referential DW_TAG_typedef "
17372 "- DIE at %s [in module %s]"),
17373 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17374 TYPE_TARGET_TYPE (this_type
) = NULL
;
17379 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17380 (which may be different from NAME) to the architecture back-end to allow
17381 it to guess the correct format if necessary. */
17383 static struct type
*
17384 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17385 const char *name_hint
)
17387 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17388 const struct floatformat
**format
;
17391 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17393 type
= init_float_type (objfile
, bits
, name
, format
);
17395 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17400 /* Find a representation of a given base type and install
17401 it in the TYPE field of the die. */
17403 static struct type
*
17404 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17406 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17408 struct attribute
*attr
;
17409 int encoding
= 0, bits
= 0;
17412 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17415 encoding
= DW_UNSND (attr
);
17417 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17420 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17422 name
= dwarf2_name (die
, cu
);
17425 complaint (&symfile_complaints
,
17426 _("DW_AT_name missing from DW_TAG_base_type"));
17431 case DW_ATE_address
:
17432 /* Turn DW_ATE_address into a void * pointer. */
17433 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17434 type
= init_pointer_type (objfile
, bits
, name
, type
);
17436 case DW_ATE_boolean
:
17437 type
= init_boolean_type (objfile
, bits
, 1, name
);
17439 case DW_ATE_complex_float
:
17440 type
= dwarf2_init_float_type (objfile
, bits
/ 2, NULL
, name
);
17441 type
= init_complex_type (objfile
, name
, type
);
17443 case DW_ATE_decimal_float
:
17444 type
= init_decfloat_type (objfile
, bits
, name
);
17447 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
17449 case DW_ATE_signed
:
17450 type
= init_integer_type (objfile
, bits
, 0, name
);
17452 case DW_ATE_unsigned
:
17453 if (cu
->language
== language_fortran
17455 && startswith (name
, "character("))
17456 type
= init_character_type (objfile
, bits
, 1, name
);
17458 type
= init_integer_type (objfile
, bits
, 1, name
);
17460 case DW_ATE_signed_char
:
17461 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17462 || cu
->language
== language_pascal
17463 || cu
->language
== language_fortran
)
17464 type
= init_character_type (objfile
, bits
, 0, name
);
17466 type
= init_integer_type (objfile
, bits
, 0, name
);
17468 case DW_ATE_unsigned_char
:
17469 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17470 || cu
->language
== language_pascal
17471 || cu
->language
== language_fortran
17472 || cu
->language
== language_rust
)
17473 type
= init_character_type (objfile
, bits
, 1, name
);
17475 type
= init_integer_type (objfile
, bits
, 1, name
);
17479 gdbarch
*arch
= get_objfile_arch (objfile
);
17482 type
= builtin_type (arch
)->builtin_char16
;
17483 else if (bits
== 32)
17484 type
= builtin_type (arch
)->builtin_char32
;
17487 complaint (&symfile_complaints
,
17488 _("unsupported DW_ATE_UTF bit size: '%d'"),
17490 type
= init_integer_type (objfile
, bits
, 1, name
);
17492 return set_die_type (die
, type
, cu
);
17497 complaint (&symfile_complaints
, _("unsupported DW_AT_encoding: '%s'"),
17498 dwarf_type_encoding_name (encoding
));
17499 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17503 if (name
&& strcmp (name
, "char") == 0)
17504 TYPE_NOSIGN (type
) = 1;
17506 maybe_set_alignment (cu
, die
, type
);
17508 return set_die_type (die
, type
, cu
);
17511 /* Parse dwarf attribute if it's a block, reference or constant and put the
17512 resulting value of the attribute into struct bound_prop.
17513 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17516 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17517 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
17519 struct dwarf2_property_baton
*baton
;
17520 struct obstack
*obstack
17521 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17523 if (attr
== NULL
|| prop
== NULL
)
17526 if (attr_form_is_block (attr
))
17528 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17529 baton
->referenced_type
= NULL
;
17530 baton
->locexpr
.per_cu
= cu
->per_cu
;
17531 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17532 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17533 prop
->data
.baton
= baton
;
17534 prop
->kind
= PROP_LOCEXPR
;
17535 gdb_assert (prop
->data
.baton
!= NULL
);
17537 else if (attr_form_is_ref (attr
))
17539 struct dwarf2_cu
*target_cu
= cu
;
17540 struct die_info
*target_die
;
17541 struct attribute
*target_attr
;
17543 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17544 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17545 if (target_attr
== NULL
)
17546 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17548 if (target_attr
== NULL
)
17551 switch (target_attr
->name
)
17553 case DW_AT_location
:
17554 if (attr_form_is_section_offset (target_attr
))
17556 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17557 baton
->referenced_type
= die_type (target_die
, target_cu
);
17558 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17559 prop
->data
.baton
= baton
;
17560 prop
->kind
= PROP_LOCLIST
;
17561 gdb_assert (prop
->data
.baton
!= NULL
);
17563 else if (attr_form_is_block (target_attr
))
17565 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17566 baton
->referenced_type
= die_type (target_die
, target_cu
);
17567 baton
->locexpr
.per_cu
= cu
->per_cu
;
17568 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17569 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17570 prop
->data
.baton
= baton
;
17571 prop
->kind
= PROP_LOCEXPR
;
17572 gdb_assert (prop
->data
.baton
!= NULL
);
17576 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17577 "dynamic property");
17581 case DW_AT_data_member_location
:
17585 if (!handle_data_member_location (target_die
, target_cu
,
17589 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17590 baton
->referenced_type
= read_type_die (target_die
->parent
,
17592 baton
->offset_info
.offset
= offset
;
17593 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17594 prop
->data
.baton
= baton
;
17595 prop
->kind
= PROP_ADDR_OFFSET
;
17600 else if (attr_form_is_constant (attr
))
17602 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
17603 prop
->kind
= PROP_CONST
;
17607 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17608 dwarf2_name (die
, cu
));
17615 /* Read the given DW_AT_subrange DIE. */
17617 static struct type
*
17618 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17620 struct type
*base_type
, *orig_base_type
;
17621 struct type
*range_type
;
17622 struct attribute
*attr
;
17623 struct dynamic_prop low
, high
;
17624 int low_default_is_valid
;
17625 int high_bound_is_count
= 0;
17627 LONGEST negative_mask
;
17629 orig_base_type
= die_type (die
, cu
);
17630 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17631 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17632 creating the range type, but we use the result of check_typedef
17633 when examining properties of the type. */
17634 base_type
= check_typedef (orig_base_type
);
17636 /* The die_type call above may have already set the type for this DIE. */
17637 range_type
= get_die_type (die
, cu
);
17641 low
.kind
= PROP_CONST
;
17642 high
.kind
= PROP_CONST
;
17643 high
.data
.const_val
= 0;
17645 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17646 omitting DW_AT_lower_bound. */
17647 switch (cu
->language
)
17650 case language_cplus
:
17651 low
.data
.const_val
= 0;
17652 low_default_is_valid
= 1;
17654 case language_fortran
:
17655 low
.data
.const_val
= 1;
17656 low_default_is_valid
= 1;
17659 case language_objc
:
17660 case language_rust
:
17661 low
.data
.const_val
= 0;
17662 low_default_is_valid
= (cu
->header
.version
>= 4);
17666 case language_pascal
:
17667 low
.data
.const_val
= 1;
17668 low_default_is_valid
= (cu
->header
.version
>= 4);
17671 low
.data
.const_val
= 0;
17672 low_default_is_valid
= 0;
17676 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17678 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
17679 else if (!low_default_is_valid
)
17680 complaint (&symfile_complaints
, _("Missing DW_AT_lower_bound "
17681 "- DIE at %s [in module %s]"),
17682 sect_offset_str (die
->sect_off
),
17683 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17685 attr
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17686 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17688 attr
= dwarf2_attr (die
, DW_AT_count
, cu
);
17689 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17691 /* If bounds are constant do the final calculation here. */
17692 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17693 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17695 high_bound_is_count
= 1;
17699 /* Dwarf-2 specifications explicitly allows to create subrange types
17700 without specifying a base type.
17701 In that case, the base type must be set to the type of
17702 the lower bound, upper bound or count, in that order, if any of these
17703 three attributes references an object that has a type.
17704 If no base type is found, the Dwarf-2 specifications say that
17705 a signed integer type of size equal to the size of an address should
17707 For the following C code: `extern char gdb_int [];'
17708 GCC produces an empty range DIE.
17709 FIXME: muller/2010-05-28: Possible references to object for low bound,
17710 high bound or count are not yet handled by this code. */
17711 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
17713 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17714 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17715 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
17716 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
17718 /* Test "int", "long int", and "long long int" objfile types,
17719 and select the first one having a size above or equal to the
17720 architecture address size. */
17721 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17722 base_type
= int_type
;
17725 int_type
= objfile_type (objfile
)->builtin_long
;
17726 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17727 base_type
= int_type
;
17730 int_type
= objfile_type (objfile
)->builtin_long_long
;
17731 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17732 base_type
= int_type
;
17737 /* Normally, the DWARF producers are expected to use a signed
17738 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17739 But this is unfortunately not always the case, as witnessed
17740 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17741 is used instead. To work around that ambiguity, we treat
17742 the bounds as signed, and thus sign-extend their values, when
17743 the base type is signed. */
17745 -((LONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17746 if (low
.kind
== PROP_CONST
17747 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17748 low
.data
.const_val
|= negative_mask
;
17749 if (high
.kind
== PROP_CONST
17750 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17751 high
.data
.const_val
|= negative_mask
;
17753 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
17755 if (high_bound_is_count
)
17756 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17758 /* Ada expects an empty array on no boundary attributes. */
17759 if (attr
== NULL
&& cu
->language
!= language_ada
)
17760 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17762 name
= dwarf2_name (die
, cu
);
17764 TYPE_NAME (range_type
) = name
;
17766 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17768 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
17770 maybe_set_alignment (cu
, die
, range_type
);
17772 set_die_type (die
, range_type
, cu
);
17774 /* set_die_type should be already done. */
17775 set_descriptive_type (range_type
, die
, cu
);
17780 static struct type
*
17781 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17785 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
17787 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
17789 /* In Ada, an unspecified type is typically used when the description
17790 of the type is defered to a different unit. When encountering
17791 such a type, we treat it as a stub, and try to resolve it later on,
17793 if (cu
->language
== language_ada
)
17794 TYPE_STUB (type
) = 1;
17796 return set_die_type (die
, type
, cu
);
17799 /* Read a single die and all its descendents. Set the die's sibling
17800 field to NULL; set other fields in the die correctly, and set all
17801 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
17802 location of the info_ptr after reading all of those dies. PARENT
17803 is the parent of the die in question. */
17805 static struct die_info
*
17806 read_die_and_children (const struct die_reader_specs
*reader
,
17807 const gdb_byte
*info_ptr
,
17808 const gdb_byte
**new_info_ptr
,
17809 struct die_info
*parent
)
17811 struct die_info
*die
;
17812 const gdb_byte
*cur_ptr
;
17815 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
17818 *new_info_ptr
= cur_ptr
;
17821 store_in_ref_table (die
, reader
->cu
);
17824 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
17828 *new_info_ptr
= cur_ptr
;
17831 die
->sibling
= NULL
;
17832 die
->parent
= parent
;
17836 /* Read a die, all of its descendents, and all of its siblings; set
17837 all of the fields of all of the dies correctly. Arguments are as
17838 in read_die_and_children. */
17840 static struct die_info
*
17841 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
17842 const gdb_byte
*info_ptr
,
17843 const gdb_byte
**new_info_ptr
,
17844 struct die_info
*parent
)
17846 struct die_info
*first_die
, *last_sibling
;
17847 const gdb_byte
*cur_ptr
;
17849 cur_ptr
= info_ptr
;
17850 first_die
= last_sibling
= NULL
;
17854 struct die_info
*die
17855 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
17859 *new_info_ptr
= cur_ptr
;
17866 last_sibling
->sibling
= die
;
17868 last_sibling
= die
;
17872 /* Read a die, all of its descendents, and all of its siblings; set
17873 all of the fields of all of the dies correctly. Arguments are as
17874 in read_die_and_children.
17875 This the main entry point for reading a DIE and all its children. */
17877 static struct die_info
*
17878 read_die_and_siblings (const struct die_reader_specs
*reader
,
17879 const gdb_byte
*info_ptr
,
17880 const gdb_byte
**new_info_ptr
,
17881 struct die_info
*parent
)
17883 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
17884 new_info_ptr
, parent
);
17886 if (dwarf_die_debug
)
17888 fprintf_unfiltered (gdb_stdlog
,
17889 "Read die from %s@0x%x of %s:\n",
17890 get_section_name (reader
->die_section
),
17891 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17892 bfd_get_filename (reader
->abfd
));
17893 dump_die (die
, dwarf_die_debug
);
17899 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
17901 The caller is responsible for filling in the extra attributes
17902 and updating (*DIEP)->num_attrs.
17903 Set DIEP to point to a newly allocated die with its information,
17904 except for its child, sibling, and parent fields.
17905 Set HAS_CHILDREN to tell whether the die has children or not. */
17907 static const gdb_byte
*
17908 read_full_die_1 (const struct die_reader_specs
*reader
,
17909 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17910 int *has_children
, int num_extra_attrs
)
17912 unsigned int abbrev_number
, bytes_read
, i
;
17913 struct abbrev_info
*abbrev
;
17914 struct die_info
*die
;
17915 struct dwarf2_cu
*cu
= reader
->cu
;
17916 bfd
*abfd
= reader
->abfd
;
17918 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
17919 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
17920 info_ptr
+= bytes_read
;
17921 if (!abbrev_number
)
17928 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
17930 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
17932 bfd_get_filename (abfd
));
17934 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
17935 die
->sect_off
= sect_off
;
17936 die
->tag
= abbrev
->tag
;
17937 die
->abbrev
= abbrev_number
;
17939 /* Make the result usable.
17940 The caller needs to update num_attrs after adding the extra
17942 die
->num_attrs
= abbrev
->num_attrs
;
17944 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
17945 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
17949 *has_children
= abbrev
->has_children
;
17953 /* Read a die and all its attributes.
17954 Set DIEP to point to a newly allocated die with its information,
17955 except for its child, sibling, and parent fields.
17956 Set HAS_CHILDREN to tell whether the die has children or not. */
17958 static const gdb_byte
*
17959 read_full_die (const struct die_reader_specs
*reader
,
17960 struct die_info
**diep
, const gdb_byte
*info_ptr
,
17963 const gdb_byte
*result
;
17965 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
17967 if (dwarf_die_debug
)
17969 fprintf_unfiltered (gdb_stdlog
,
17970 "Read die from %s@0x%x of %s:\n",
17971 get_section_name (reader
->die_section
),
17972 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
17973 bfd_get_filename (reader
->abfd
));
17974 dump_die (*diep
, dwarf_die_debug
);
17980 /* Abbreviation tables.
17982 In DWARF version 2, the description of the debugging information is
17983 stored in a separate .debug_abbrev section. Before we read any
17984 dies from a section we read in all abbreviations and install them
17985 in a hash table. */
17987 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
17989 struct abbrev_info
*
17990 abbrev_table::alloc_abbrev ()
17992 struct abbrev_info
*abbrev
;
17994 abbrev
= XOBNEW (&abbrev_obstack
, struct abbrev_info
);
17995 memset (abbrev
, 0, sizeof (struct abbrev_info
));
18000 /* Add an abbreviation to the table. */
18003 abbrev_table::add_abbrev (unsigned int abbrev_number
,
18004 struct abbrev_info
*abbrev
)
18006 unsigned int hash_number
;
18008 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18009 abbrev
->next
= m_abbrevs
[hash_number
];
18010 m_abbrevs
[hash_number
] = abbrev
;
18013 /* Look up an abbrev in the table.
18014 Returns NULL if the abbrev is not found. */
18016 struct abbrev_info
*
18017 abbrev_table::lookup_abbrev (unsigned int abbrev_number
)
18019 unsigned int hash_number
;
18020 struct abbrev_info
*abbrev
;
18022 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18023 abbrev
= m_abbrevs
[hash_number
];
18027 if (abbrev
->number
== abbrev_number
)
18029 abbrev
= abbrev
->next
;
18034 /* Read in an abbrev table. */
18036 static abbrev_table_up
18037 abbrev_table_read_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
18038 struct dwarf2_section_info
*section
,
18039 sect_offset sect_off
)
18041 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18042 bfd
*abfd
= get_section_bfd_owner (section
);
18043 const gdb_byte
*abbrev_ptr
;
18044 struct abbrev_info
*cur_abbrev
;
18045 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
18046 unsigned int abbrev_form
;
18047 struct attr_abbrev
*cur_attrs
;
18048 unsigned int allocated_attrs
;
18050 abbrev_table_up
abbrev_table (new struct abbrev_table (sect_off
));
18052 dwarf2_read_section (objfile
, section
);
18053 abbrev_ptr
= section
->buffer
+ to_underlying (sect_off
);
18054 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18055 abbrev_ptr
+= bytes_read
;
18057 allocated_attrs
= ATTR_ALLOC_CHUNK
;
18058 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
18060 /* Loop until we reach an abbrev number of 0. */
18061 while (abbrev_number
)
18063 cur_abbrev
= abbrev_table
->alloc_abbrev ();
18065 /* read in abbrev header */
18066 cur_abbrev
->number
= abbrev_number
;
18068 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18069 abbrev_ptr
+= bytes_read
;
18070 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
18073 /* now read in declarations */
18076 LONGEST implicit_const
;
18078 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18079 abbrev_ptr
+= bytes_read
;
18080 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18081 abbrev_ptr
+= bytes_read
;
18082 if (abbrev_form
== DW_FORM_implicit_const
)
18084 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
18086 abbrev_ptr
+= bytes_read
;
18090 /* Initialize it due to a false compiler warning. */
18091 implicit_const
= -1;
18094 if (abbrev_name
== 0)
18097 if (cur_abbrev
->num_attrs
== allocated_attrs
)
18099 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
18101 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
18104 cur_attrs
[cur_abbrev
->num_attrs
].name
18105 = (enum dwarf_attribute
) abbrev_name
;
18106 cur_attrs
[cur_abbrev
->num_attrs
].form
18107 = (enum dwarf_form
) abbrev_form
;
18108 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
18109 ++cur_abbrev
->num_attrs
;
18112 cur_abbrev
->attrs
=
18113 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
18114 cur_abbrev
->num_attrs
);
18115 memcpy (cur_abbrev
->attrs
, cur_attrs
,
18116 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
18118 abbrev_table
->add_abbrev (abbrev_number
, cur_abbrev
);
18120 /* Get next abbreviation.
18121 Under Irix6 the abbreviations for a compilation unit are not
18122 always properly terminated with an abbrev number of 0.
18123 Exit loop if we encounter an abbreviation which we have
18124 already read (which means we are about to read the abbreviations
18125 for the next compile unit) or if the end of the abbreviation
18126 table is reached. */
18127 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
18129 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18130 abbrev_ptr
+= bytes_read
;
18131 if (abbrev_table
->lookup_abbrev (abbrev_number
) != NULL
)
18136 return abbrev_table
;
18139 /* Returns nonzero if TAG represents a type that we might generate a partial
18143 is_type_tag_for_partial (int tag
)
18148 /* Some types that would be reasonable to generate partial symbols for,
18149 that we don't at present. */
18150 case DW_TAG_array_type
:
18151 case DW_TAG_file_type
:
18152 case DW_TAG_ptr_to_member_type
:
18153 case DW_TAG_set_type
:
18154 case DW_TAG_string_type
:
18155 case DW_TAG_subroutine_type
:
18157 case DW_TAG_base_type
:
18158 case DW_TAG_class_type
:
18159 case DW_TAG_interface_type
:
18160 case DW_TAG_enumeration_type
:
18161 case DW_TAG_structure_type
:
18162 case DW_TAG_subrange_type
:
18163 case DW_TAG_typedef
:
18164 case DW_TAG_union_type
:
18171 /* Load all DIEs that are interesting for partial symbols into memory. */
18173 static struct partial_die_info
*
18174 load_partial_dies (const struct die_reader_specs
*reader
,
18175 const gdb_byte
*info_ptr
, int building_psymtab
)
18177 struct dwarf2_cu
*cu
= reader
->cu
;
18178 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18179 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18180 unsigned int bytes_read
;
18181 unsigned int load_all
= 0;
18182 int nesting_level
= 1;
18187 gdb_assert (cu
->per_cu
!= NULL
);
18188 if (cu
->per_cu
->load_all_dies
)
18192 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18196 &cu
->comp_unit_obstack
,
18197 hashtab_obstack_allocate
,
18198 dummy_obstack_deallocate
);
18202 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18204 /* A NULL abbrev means the end of a series of children. */
18205 if (abbrev
== NULL
)
18207 if (--nesting_level
== 0)
18210 info_ptr
+= bytes_read
;
18211 last_die
= parent_die
;
18212 parent_die
= parent_die
->die_parent
;
18216 /* Check for template arguments. We never save these; if
18217 they're seen, we just mark the parent, and go on our way. */
18218 if (parent_die
!= NULL
18219 && cu
->language
== language_cplus
18220 && (abbrev
->tag
== DW_TAG_template_type_param
18221 || abbrev
->tag
== DW_TAG_template_value_param
))
18223 parent_die
->has_template_arguments
= 1;
18227 /* We don't need a partial DIE for the template argument. */
18228 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18233 /* We only recurse into c++ subprograms looking for template arguments.
18234 Skip their other children. */
18236 && cu
->language
== language_cplus
18237 && parent_die
!= NULL
18238 && parent_die
->tag
== DW_TAG_subprogram
)
18240 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18244 /* Check whether this DIE is interesting enough to save. Normally
18245 we would not be interested in members here, but there may be
18246 later variables referencing them via DW_AT_specification (for
18247 static members). */
18249 && !is_type_tag_for_partial (abbrev
->tag
)
18250 && abbrev
->tag
!= DW_TAG_constant
18251 && abbrev
->tag
!= DW_TAG_enumerator
18252 && abbrev
->tag
!= DW_TAG_subprogram
18253 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18254 && abbrev
->tag
!= DW_TAG_lexical_block
18255 && abbrev
->tag
!= DW_TAG_variable
18256 && abbrev
->tag
!= DW_TAG_namespace
18257 && abbrev
->tag
!= DW_TAG_module
18258 && abbrev
->tag
!= DW_TAG_member
18259 && abbrev
->tag
!= DW_TAG_imported_unit
18260 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18262 /* Otherwise we skip to the next sibling, if any. */
18263 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18267 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18270 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18272 /* This two-pass algorithm for processing partial symbols has a
18273 high cost in cache pressure. Thus, handle some simple cases
18274 here which cover the majority of C partial symbols. DIEs
18275 which neither have specification tags in them, nor could have
18276 specification tags elsewhere pointing at them, can simply be
18277 processed and discarded.
18279 This segment is also optional; scan_partial_symbols and
18280 add_partial_symbol will handle these DIEs if we chain
18281 them in normally. When compilers which do not emit large
18282 quantities of duplicate debug information are more common,
18283 this code can probably be removed. */
18285 /* Any complete simple types at the top level (pretty much all
18286 of them, for a language without namespaces), can be processed
18288 if (parent_die
== NULL
18289 && pdi
.has_specification
== 0
18290 && pdi
.is_declaration
== 0
18291 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18292 || pdi
.tag
== DW_TAG_base_type
18293 || pdi
.tag
== DW_TAG_subrange_type
))
18295 if (building_psymtab
&& pdi
.name
!= NULL
)
18296 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18297 VAR_DOMAIN
, LOC_TYPEDEF
,
18298 &objfile
->static_psymbols
,
18299 0, cu
->language
, objfile
);
18300 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18304 /* The exception for DW_TAG_typedef with has_children above is
18305 a workaround of GCC PR debug/47510. In the case of this complaint
18306 type_name_no_tag_or_error will error on such types later.
18308 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18309 it could not find the child DIEs referenced later, this is checked
18310 above. In correct DWARF DW_TAG_typedef should have no children. */
18312 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18313 complaint (&symfile_complaints
,
18314 _("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18315 "- DIE at %s [in module %s]"),
18316 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18318 /* If we're at the second level, and we're an enumerator, and
18319 our parent has no specification (meaning possibly lives in a
18320 namespace elsewhere), then we can add the partial symbol now
18321 instead of queueing it. */
18322 if (pdi
.tag
== DW_TAG_enumerator
18323 && parent_die
!= NULL
18324 && parent_die
->die_parent
== NULL
18325 && parent_die
->tag
== DW_TAG_enumeration_type
18326 && parent_die
->has_specification
== 0)
18328 if (pdi
.name
== NULL
)
18329 complaint (&symfile_complaints
,
18330 _("malformed enumerator DIE ignored"));
18331 else if (building_psymtab
)
18332 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18333 VAR_DOMAIN
, LOC_CONST
,
18334 cu
->language
== language_cplus
18335 ? &objfile
->global_psymbols
18336 : &objfile
->static_psymbols
,
18337 0, cu
->language
, objfile
);
18339 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18343 struct partial_die_info
*part_die
18344 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18346 /* We'll save this DIE so link it in. */
18347 part_die
->die_parent
= parent_die
;
18348 part_die
->die_sibling
= NULL
;
18349 part_die
->die_child
= NULL
;
18351 if (last_die
&& last_die
== parent_die
)
18352 last_die
->die_child
= part_die
;
18354 last_die
->die_sibling
= part_die
;
18356 last_die
= part_die
;
18358 if (first_die
== NULL
)
18359 first_die
= part_die
;
18361 /* Maybe add the DIE to the hash table. Not all DIEs that we
18362 find interesting need to be in the hash table, because we
18363 also have the parent/sibling/child chains; only those that we
18364 might refer to by offset later during partial symbol reading.
18366 For now this means things that might have be the target of a
18367 DW_AT_specification, DW_AT_abstract_origin, or
18368 DW_AT_extension. DW_AT_extension will refer only to
18369 namespaces; DW_AT_abstract_origin refers to functions (and
18370 many things under the function DIE, but we do not recurse
18371 into function DIEs during partial symbol reading) and
18372 possibly variables as well; DW_AT_specification refers to
18373 declarations. Declarations ought to have the DW_AT_declaration
18374 flag. It happens that GCC forgets to put it in sometimes, but
18375 only for functions, not for types.
18377 Adding more things than necessary to the hash table is harmless
18378 except for the performance cost. Adding too few will result in
18379 wasted time in find_partial_die, when we reread the compilation
18380 unit with load_all_dies set. */
18383 || abbrev
->tag
== DW_TAG_constant
18384 || abbrev
->tag
== DW_TAG_subprogram
18385 || abbrev
->tag
== DW_TAG_variable
18386 || abbrev
->tag
== DW_TAG_namespace
18387 || part_die
->is_declaration
)
18391 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18392 to_underlying (part_die
->sect_off
),
18397 /* For some DIEs we want to follow their children (if any). For C
18398 we have no reason to follow the children of structures; for other
18399 languages we have to, so that we can get at method physnames
18400 to infer fully qualified class names, for DW_AT_specification,
18401 and for C++ template arguments. For C++, we also look one level
18402 inside functions to find template arguments (if the name of the
18403 function does not already contain the template arguments).
18405 For Ada, we need to scan the children of subprograms and lexical
18406 blocks as well because Ada allows the definition of nested
18407 entities that could be interesting for the debugger, such as
18408 nested subprograms for instance. */
18409 if (last_die
->has_children
18411 || last_die
->tag
== DW_TAG_namespace
18412 || last_die
->tag
== DW_TAG_module
18413 || last_die
->tag
== DW_TAG_enumeration_type
18414 || (cu
->language
== language_cplus
18415 && last_die
->tag
== DW_TAG_subprogram
18416 && (last_die
->name
== NULL
18417 || strchr (last_die
->name
, '<') == NULL
))
18418 || (cu
->language
!= language_c
18419 && (last_die
->tag
== DW_TAG_class_type
18420 || last_die
->tag
== DW_TAG_interface_type
18421 || last_die
->tag
== DW_TAG_structure_type
18422 || last_die
->tag
== DW_TAG_union_type
))
18423 || (cu
->language
== language_ada
18424 && (last_die
->tag
== DW_TAG_subprogram
18425 || last_die
->tag
== DW_TAG_lexical_block
))))
18428 parent_die
= last_die
;
18432 /* Otherwise we skip to the next sibling, if any. */
18433 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18435 /* Back to the top, do it again. */
18439 partial_die_info::partial_die_info (sect_offset sect_off_
,
18440 struct abbrev_info
*abbrev
)
18441 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18445 /* Read a minimal amount of information into the minimal die structure.
18446 INFO_PTR should point just after the initial uleb128 of a DIE. */
18449 partial_die_info::read (const struct die_reader_specs
*reader
,
18450 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18452 struct dwarf2_cu
*cu
= reader
->cu
;
18453 struct dwarf2_per_objfile
*dwarf2_per_objfile
18454 = cu
->per_cu
->dwarf2_per_objfile
;
18456 int has_low_pc_attr
= 0;
18457 int has_high_pc_attr
= 0;
18458 int high_pc_relative
= 0;
18460 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18462 struct attribute attr
;
18464 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
], info_ptr
);
18466 /* Store the data if it is of an attribute we want to keep in a
18467 partial symbol table. */
18473 case DW_TAG_compile_unit
:
18474 case DW_TAG_partial_unit
:
18475 case DW_TAG_type_unit
:
18476 /* Compilation units have a DW_AT_name that is a filename, not
18477 a source language identifier. */
18478 case DW_TAG_enumeration_type
:
18479 case DW_TAG_enumerator
:
18480 /* These tags always have simple identifiers already; no need
18481 to canonicalize them. */
18482 name
= DW_STRING (&attr
);
18486 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18489 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
18490 &objfile
->per_bfd
->storage_obstack
);
18495 case DW_AT_linkage_name
:
18496 case DW_AT_MIPS_linkage_name
:
18497 /* Note that both forms of linkage name might appear. We
18498 assume they will be the same, and we only store the last
18500 if (cu
->language
== language_ada
)
18501 name
= DW_STRING (&attr
);
18502 linkage_name
= DW_STRING (&attr
);
18505 has_low_pc_attr
= 1;
18506 lowpc
= attr_value_as_address (&attr
);
18508 case DW_AT_high_pc
:
18509 has_high_pc_attr
= 1;
18510 highpc
= attr_value_as_address (&attr
);
18511 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
18512 high_pc_relative
= 1;
18514 case DW_AT_location
:
18515 /* Support the .debug_loc offsets. */
18516 if (attr_form_is_block (&attr
))
18518 d
.locdesc
= DW_BLOCK (&attr
);
18520 else if (attr_form_is_section_offset (&attr
))
18522 dwarf2_complex_location_expr_complaint ();
18526 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18527 "partial symbol information");
18530 case DW_AT_external
:
18531 is_external
= DW_UNSND (&attr
);
18533 case DW_AT_declaration
:
18534 is_declaration
= DW_UNSND (&attr
);
18539 case DW_AT_abstract_origin
:
18540 case DW_AT_specification
:
18541 case DW_AT_extension
:
18542 has_specification
= 1;
18543 spec_offset
= dwarf2_get_ref_die_offset (&attr
);
18544 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18545 || cu
->per_cu
->is_dwz
);
18547 case DW_AT_sibling
:
18548 /* Ignore absolute siblings, they might point outside of
18549 the current compile unit. */
18550 if (attr
.form
== DW_FORM_ref_addr
)
18551 complaint (&symfile_complaints
,
18552 _("ignoring absolute DW_AT_sibling"));
18555 const gdb_byte
*buffer
= reader
->buffer
;
18556 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
18557 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18559 if (sibling_ptr
< info_ptr
)
18560 complaint (&symfile_complaints
,
18561 _("DW_AT_sibling points backwards"));
18562 else if (sibling_ptr
> reader
->buffer_end
)
18563 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
18565 sibling
= sibling_ptr
;
18568 case DW_AT_byte_size
:
18571 case DW_AT_const_value
:
18572 has_const_value
= 1;
18574 case DW_AT_calling_convention
:
18575 /* DWARF doesn't provide a way to identify a program's source-level
18576 entry point. DW_AT_calling_convention attributes are only meant
18577 to describe functions' calling conventions.
18579 However, because it's a necessary piece of information in
18580 Fortran, and before DWARF 4 DW_CC_program was the only
18581 piece of debugging information whose definition refers to
18582 a 'main program' at all, several compilers marked Fortran
18583 main programs with DW_CC_program --- even when those
18584 functions use the standard calling conventions.
18586 Although DWARF now specifies a way to provide this
18587 information, we support this practice for backward
18589 if (DW_UNSND (&attr
) == DW_CC_program
18590 && cu
->language
== language_fortran
)
18591 main_subprogram
= 1;
18594 if (DW_UNSND (&attr
) == DW_INL_inlined
18595 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18596 may_be_inlined
= 1;
18600 if (tag
== DW_TAG_imported_unit
)
18602 d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
18603 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18604 || cu
->per_cu
->is_dwz
);
18608 case DW_AT_main_subprogram
:
18609 main_subprogram
= DW_UNSND (&attr
);
18617 if (high_pc_relative
)
18620 if (has_low_pc_attr
&& has_high_pc_attr
)
18622 /* When using the GNU linker, .gnu.linkonce. sections are used to
18623 eliminate duplicate copies of functions and vtables and such.
18624 The linker will arbitrarily choose one and discard the others.
18625 The AT_*_pc values for such functions refer to local labels in
18626 these sections. If the section from that file was discarded, the
18627 labels are not in the output, so the relocs get a value of 0.
18628 If this is a discarded function, mark the pc bounds as invalid,
18629 so that GDB will ignore it. */
18630 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18632 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18633 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18635 complaint (&symfile_complaints
,
18636 _("DW_AT_low_pc %s is zero "
18637 "for DIE at %s [in module %s]"),
18638 paddress (gdbarch
, lowpc
),
18639 sect_offset_str (sect_off
),
18640 objfile_name (objfile
));
18642 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18643 else if (lowpc
>= highpc
)
18645 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18646 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18648 complaint (&symfile_complaints
,
18649 _("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18650 "for DIE at %s [in module %s]"),
18651 paddress (gdbarch
, lowpc
),
18652 paddress (gdbarch
, highpc
),
18653 sect_offset_str (sect_off
),
18654 objfile_name (objfile
));
18663 /* Find a cached partial DIE at OFFSET in CU. */
18665 struct partial_die_info
*
18666 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18668 struct partial_die_info
*lookup_die
= NULL
;
18669 struct partial_die_info
part_die (sect_off
);
18671 lookup_die
= ((struct partial_die_info
*)
18672 htab_find_with_hash (partial_dies
, &part_die
,
18673 to_underlying (sect_off
)));
18678 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18679 except in the case of .debug_types DIEs which do not reference
18680 outside their CU (they do however referencing other types via
18681 DW_FORM_ref_sig8). */
18683 static struct partial_die_info
*
18684 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18686 struct dwarf2_per_objfile
*dwarf2_per_objfile
18687 = cu
->per_cu
->dwarf2_per_objfile
;
18688 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18689 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18690 struct partial_die_info
*pd
= NULL
;
18692 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18693 && offset_in_cu_p (&cu
->header
, sect_off
))
18695 pd
= cu
->find_partial_die (sect_off
);
18698 /* We missed recording what we needed.
18699 Load all dies and try again. */
18700 per_cu
= cu
->per_cu
;
18704 /* TUs don't reference other CUs/TUs (except via type signatures). */
18705 if (cu
->per_cu
->is_debug_types
)
18707 error (_("Dwarf Error: Type Unit at offset %s contains"
18708 " external reference to offset %s [in module %s].\n"),
18709 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18710 bfd_get_filename (objfile
->obfd
));
18712 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18713 dwarf2_per_objfile
);
18715 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18716 load_partial_comp_unit (per_cu
);
18718 per_cu
->cu
->last_used
= 0;
18719 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18722 /* If we didn't find it, and not all dies have been loaded,
18723 load them all and try again. */
18725 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18727 per_cu
->load_all_dies
= 1;
18729 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18730 THIS_CU->cu may already be in use. So we can't just free it and
18731 replace its DIEs with the ones we read in. Instead, we leave those
18732 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18733 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18735 load_partial_comp_unit (per_cu
);
18737 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18741 internal_error (__FILE__
, __LINE__
,
18742 _("could not find partial DIE %s "
18743 "in cache [from module %s]\n"),
18744 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18748 /* See if we can figure out if the class lives in a namespace. We do
18749 this by looking for a member function; its demangled name will
18750 contain namespace info, if there is any. */
18753 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
18754 struct dwarf2_cu
*cu
)
18756 /* NOTE: carlton/2003-10-07: Getting the info this way changes
18757 what template types look like, because the demangler
18758 frequently doesn't give the same name as the debug info. We
18759 could fix this by only using the demangled name to get the
18760 prefix (but see comment in read_structure_type). */
18762 struct partial_die_info
*real_pdi
;
18763 struct partial_die_info
*child_pdi
;
18765 /* If this DIE (this DIE's specification, if any) has a parent, then
18766 we should not do this. We'll prepend the parent's fully qualified
18767 name when we create the partial symbol. */
18769 real_pdi
= struct_pdi
;
18770 while (real_pdi
->has_specification
)
18771 real_pdi
= find_partial_die (real_pdi
->spec_offset
,
18772 real_pdi
->spec_is_dwz
, cu
);
18774 if (real_pdi
->die_parent
!= NULL
)
18777 for (child_pdi
= struct_pdi
->die_child
;
18779 child_pdi
= child_pdi
->die_sibling
)
18781 if (child_pdi
->tag
== DW_TAG_subprogram
18782 && child_pdi
->linkage_name
!= NULL
)
18784 char *actual_class_name
18785 = language_class_name_from_physname (cu
->language_defn
,
18786 child_pdi
->linkage_name
);
18787 if (actual_class_name
!= NULL
)
18789 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18792 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
18794 strlen (actual_class_name
)));
18795 xfree (actual_class_name
);
18803 partial_die_info::fixup (struct dwarf2_cu
*cu
)
18805 /* Once we've fixed up a die, there's no point in doing so again.
18806 This also avoids a memory leak if we were to call
18807 guess_partial_die_structure_name multiple times. */
18811 /* If we found a reference attribute and the DIE has no name, try
18812 to find a name in the referred to DIE. */
18814 if (name
== NULL
&& has_specification
)
18816 struct partial_die_info
*spec_die
;
18818 spec_die
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
18820 spec_die
->fixup (cu
);
18822 if (spec_die
->name
)
18824 name
= spec_die
->name
;
18826 /* Copy DW_AT_external attribute if it is set. */
18827 if (spec_die
->is_external
)
18828 is_external
= spec_die
->is_external
;
18832 /* Set default names for some unnamed DIEs. */
18834 if (name
== NULL
&& tag
== DW_TAG_namespace
)
18835 name
= CP_ANONYMOUS_NAMESPACE_STR
;
18837 /* If there is no parent die to provide a namespace, and there are
18838 children, see if we can determine the namespace from their linkage
18840 if (cu
->language
== language_cplus
18841 && !VEC_empty (dwarf2_section_info_def
,
18842 cu
->per_cu
->dwarf2_per_objfile
->types
)
18843 && die_parent
== NULL
18845 && (tag
== DW_TAG_class_type
18846 || tag
== DW_TAG_structure_type
18847 || tag
== DW_TAG_union_type
))
18848 guess_partial_die_structure_name (this, cu
);
18850 /* GCC might emit a nameless struct or union that has a linkage
18851 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
18853 && (tag
== DW_TAG_class_type
18854 || tag
== DW_TAG_interface_type
18855 || tag
== DW_TAG_structure_type
18856 || tag
== DW_TAG_union_type
)
18857 && linkage_name
!= NULL
)
18861 demangled
= gdb_demangle (linkage_name
, DMGL_TYPES
);
18866 /* Strip any leading namespaces/classes, keep only the base name.
18867 DW_AT_name for named DIEs does not contain the prefixes. */
18868 base
= strrchr (demangled
, ':');
18869 if (base
&& base
> demangled
&& base
[-1] == ':')
18874 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18877 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
18878 base
, strlen (base
)));
18886 /* Read an attribute value described by an attribute form. */
18888 static const gdb_byte
*
18889 read_attribute_value (const struct die_reader_specs
*reader
,
18890 struct attribute
*attr
, unsigned form
,
18891 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
18893 struct dwarf2_cu
*cu
= reader
->cu
;
18894 struct dwarf2_per_objfile
*dwarf2_per_objfile
18895 = cu
->per_cu
->dwarf2_per_objfile
;
18896 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18897 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18898 bfd
*abfd
= reader
->abfd
;
18899 struct comp_unit_head
*cu_header
= &cu
->header
;
18900 unsigned int bytes_read
;
18901 struct dwarf_block
*blk
;
18903 attr
->form
= (enum dwarf_form
) form
;
18906 case DW_FORM_ref_addr
:
18907 if (cu
->header
.version
== 2)
18908 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18910 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
18911 &cu
->header
, &bytes_read
);
18912 info_ptr
+= bytes_read
;
18914 case DW_FORM_GNU_ref_alt
:
18915 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18916 info_ptr
+= bytes_read
;
18919 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
18920 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
18921 info_ptr
+= bytes_read
;
18923 case DW_FORM_block2
:
18924 blk
= dwarf_alloc_block (cu
);
18925 blk
->size
= read_2_bytes (abfd
, info_ptr
);
18927 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18928 info_ptr
+= blk
->size
;
18929 DW_BLOCK (attr
) = blk
;
18931 case DW_FORM_block4
:
18932 blk
= dwarf_alloc_block (cu
);
18933 blk
->size
= read_4_bytes (abfd
, info_ptr
);
18935 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
18936 info_ptr
+= blk
->size
;
18937 DW_BLOCK (attr
) = blk
;
18939 case DW_FORM_data2
:
18940 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
18943 case DW_FORM_data4
:
18944 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
18947 case DW_FORM_data8
:
18948 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
18951 case DW_FORM_data16
:
18952 blk
= dwarf_alloc_block (cu
);
18954 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
18956 DW_BLOCK (attr
) = blk
;
18958 case DW_FORM_sec_offset
:
18959 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
18960 info_ptr
+= bytes_read
;
18962 case DW_FORM_string
:
18963 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
18964 DW_STRING_IS_CANONICAL (attr
) = 0;
18965 info_ptr
+= bytes_read
;
18968 if (!cu
->per_cu
->is_dwz
)
18970 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
18971 abfd
, info_ptr
, cu_header
,
18973 DW_STRING_IS_CANONICAL (attr
) = 0;
18974 info_ptr
+= bytes_read
;
18978 case DW_FORM_line_strp
:
18979 if (!cu
->per_cu
->is_dwz
)
18981 DW_STRING (attr
) = read_indirect_line_string (dwarf2_per_objfile
,
18983 cu_header
, &bytes_read
);
18984 DW_STRING_IS_CANONICAL (attr
) = 0;
18985 info_ptr
+= bytes_read
;
18989 case DW_FORM_GNU_strp_alt
:
18991 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
18992 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
18995 DW_STRING (attr
) = read_indirect_string_from_dwz (objfile
,
18997 DW_STRING_IS_CANONICAL (attr
) = 0;
18998 info_ptr
+= bytes_read
;
19001 case DW_FORM_exprloc
:
19002 case DW_FORM_block
:
19003 blk
= dwarf_alloc_block (cu
);
19004 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19005 info_ptr
+= bytes_read
;
19006 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19007 info_ptr
+= blk
->size
;
19008 DW_BLOCK (attr
) = blk
;
19010 case DW_FORM_block1
:
19011 blk
= dwarf_alloc_block (cu
);
19012 blk
->size
= read_1_byte (abfd
, info_ptr
);
19014 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19015 info_ptr
+= blk
->size
;
19016 DW_BLOCK (attr
) = blk
;
19018 case DW_FORM_data1
:
19019 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19023 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19026 case DW_FORM_flag_present
:
19027 DW_UNSND (attr
) = 1;
19029 case DW_FORM_sdata
:
19030 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19031 info_ptr
+= bytes_read
;
19033 case DW_FORM_udata
:
19034 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19035 info_ptr
+= bytes_read
;
19038 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19039 + read_1_byte (abfd
, info_ptr
));
19043 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19044 + read_2_bytes (abfd
, info_ptr
));
19048 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19049 + read_4_bytes (abfd
, info_ptr
));
19053 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19054 + read_8_bytes (abfd
, info_ptr
));
19057 case DW_FORM_ref_sig8
:
19058 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19061 case DW_FORM_ref_udata
:
19062 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19063 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19064 info_ptr
+= bytes_read
;
19066 case DW_FORM_indirect
:
19067 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19068 info_ptr
+= bytes_read
;
19069 if (form
== DW_FORM_implicit_const
)
19071 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19072 info_ptr
+= bytes_read
;
19074 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19077 case DW_FORM_implicit_const
:
19078 DW_SND (attr
) = implicit_const
;
19080 case DW_FORM_GNU_addr_index
:
19081 if (reader
->dwo_file
== NULL
)
19083 /* For now flag a hard error.
19084 Later we can turn this into a complaint. */
19085 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19086 dwarf_form_name (form
),
19087 bfd_get_filename (abfd
));
19089 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
19090 info_ptr
+= bytes_read
;
19092 case DW_FORM_GNU_str_index
:
19093 if (reader
->dwo_file
== NULL
)
19095 /* For now flag a hard error.
19096 Later we can turn this into a complaint if warranted. */
19097 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19098 dwarf_form_name (form
),
19099 bfd_get_filename (abfd
));
19102 ULONGEST str_index
=
19103 read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19105 DW_STRING (attr
) = read_str_index (reader
, str_index
);
19106 DW_STRING_IS_CANONICAL (attr
) = 0;
19107 info_ptr
+= bytes_read
;
19111 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19112 dwarf_form_name (form
),
19113 bfd_get_filename (abfd
));
19117 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
19118 attr
->form
= DW_FORM_GNU_ref_alt
;
19120 /* We have seen instances where the compiler tried to emit a byte
19121 size attribute of -1 which ended up being encoded as an unsigned
19122 0xffffffff. Although 0xffffffff is technically a valid size value,
19123 an object of this size seems pretty unlikely so we can relatively
19124 safely treat these cases as if the size attribute was invalid and
19125 treat them as zero by default. */
19126 if (attr
->name
== DW_AT_byte_size
19127 && form
== DW_FORM_data4
19128 && DW_UNSND (attr
) >= 0xffffffff)
19131 (&symfile_complaints
,
19132 _("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19133 hex_string (DW_UNSND (attr
)));
19134 DW_UNSND (attr
) = 0;
19140 /* Read an attribute described by an abbreviated attribute. */
19142 static const gdb_byte
*
19143 read_attribute (const struct die_reader_specs
*reader
,
19144 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19145 const gdb_byte
*info_ptr
)
19147 attr
->name
= abbrev
->name
;
19148 return read_attribute_value (reader
, attr
, abbrev
->form
,
19149 abbrev
->implicit_const
, info_ptr
);
19152 /* Read dwarf information from a buffer. */
19154 static unsigned int
19155 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
19157 return bfd_get_8 (abfd
, buf
);
19161 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
19163 return bfd_get_signed_8 (abfd
, buf
);
19166 static unsigned int
19167 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19169 return bfd_get_16 (abfd
, buf
);
19173 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19175 return bfd_get_signed_16 (abfd
, buf
);
19178 static unsigned int
19179 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19181 return bfd_get_32 (abfd
, buf
);
19185 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19187 return bfd_get_signed_32 (abfd
, buf
);
19191 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19193 return bfd_get_64 (abfd
, buf
);
19197 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
19198 unsigned int *bytes_read
)
19200 struct comp_unit_head
*cu_header
= &cu
->header
;
19201 CORE_ADDR retval
= 0;
19203 if (cu_header
->signed_addr_p
)
19205 switch (cu_header
->addr_size
)
19208 retval
= bfd_get_signed_16 (abfd
, buf
);
19211 retval
= bfd_get_signed_32 (abfd
, buf
);
19214 retval
= bfd_get_signed_64 (abfd
, buf
);
19217 internal_error (__FILE__
, __LINE__
,
19218 _("read_address: bad switch, signed [in module %s]"),
19219 bfd_get_filename (abfd
));
19224 switch (cu_header
->addr_size
)
19227 retval
= bfd_get_16 (abfd
, buf
);
19230 retval
= bfd_get_32 (abfd
, buf
);
19233 retval
= bfd_get_64 (abfd
, buf
);
19236 internal_error (__FILE__
, __LINE__
,
19237 _("read_address: bad switch, "
19238 "unsigned [in module %s]"),
19239 bfd_get_filename (abfd
));
19243 *bytes_read
= cu_header
->addr_size
;
19247 /* Read the initial length from a section. The (draft) DWARF 3
19248 specification allows the initial length to take up either 4 bytes
19249 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
19250 bytes describe the length and all offsets will be 8 bytes in length
19253 An older, non-standard 64-bit format is also handled by this
19254 function. The older format in question stores the initial length
19255 as an 8-byte quantity without an escape value. Lengths greater
19256 than 2^32 aren't very common which means that the initial 4 bytes
19257 is almost always zero. Since a length value of zero doesn't make
19258 sense for the 32-bit format, this initial zero can be considered to
19259 be an escape value which indicates the presence of the older 64-bit
19260 format. As written, the code can't detect (old format) lengths
19261 greater than 4GB. If it becomes necessary to handle lengths
19262 somewhat larger than 4GB, we could allow other small values (such
19263 as the non-sensical values of 1, 2, and 3) to also be used as
19264 escape values indicating the presence of the old format.
19266 The value returned via bytes_read should be used to increment the
19267 relevant pointer after calling read_initial_length().
19269 [ Note: read_initial_length() and read_offset() are based on the
19270 document entitled "DWARF Debugging Information Format", revision
19271 3, draft 8, dated November 19, 2001. This document was obtained
19274 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
19276 This document is only a draft and is subject to change. (So beware.)
19278 Details regarding the older, non-standard 64-bit format were
19279 determined empirically by examining 64-bit ELF files produced by
19280 the SGI toolchain on an IRIX 6.5 machine.
19282 - Kevin, July 16, 2002
19286 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
19288 LONGEST length
= bfd_get_32 (abfd
, buf
);
19290 if (length
== 0xffffffff)
19292 length
= bfd_get_64 (abfd
, buf
+ 4);
19295 else if (length
== 0)
19297 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
19298 length
= bfd_get_64 (abfd
, buf
);
19309 /* Cover function for read_initial_length.
19310 Returns the length of the object at BUF, and stores the size of the
19311 initial length in *BYTES_READ and stores the size that offsets will be in
19313 If the initial length size is not equivalent to that specified in
19314 CU_HEADER then issue a complaint.
19315 This is useful when reading non-comp-unit headers. */
19318 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
19319 const struct comp_unit_head
*cu_header
,
19320 unsigned int *bytes_read
,
19321 unsigned int *offset_size
)
19323 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
19325 gdb_assert (cu_header
->initial_length_size
== 4
19326 || cu_header
->initial_length_size
== 8
19327 || cu_header
->initial_length_size
== 12);
19329 if (cu_header
->initial_length_size
!= *bytes_read
)
19330 complaint (&symfile_complaints
,
19331 _("intermixed 32-bit and 64-bit DWARF sections"));
19333 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
19337 /* Read an offset from the data stream. The size of the offset is
19338 given by cu_header->offset_size. */
19341 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
19342 const struct comp_unit_head
*cu_header
,
19343 unsigned int *bytes_read
)
19345 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
19347 *bytes_read
= cu_header
->offset_size
;
19351 /* Read an offset from the data stream. */
19354 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
19356 LONGEST retval
= 0;
19358 switch (offset_size
)
19361 retval
= bfd_get_32 (abfd
, buf
);
19364 retval
= bfd_get_64 (abfd
, buf
);
19367 internal_error (__FILE__
, __LINE__
,
19368 _("read_offset_1: bad switch [in module %s]"),
19369 bfd_get_filename (abfd
));
19375 static const gdb_byte
*
19376 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
19378 /* If the size of a host char is 8 bits, we can return a pointer
19379 to the buffer, otherwise we have to copy the data to a buffer
19380 allocated on the temporary obstack. */
19381 gdb_assert (HOST_CHAR_BIT
== 8);
19385 static const char *
19386 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
19387 unsigned int *bytes_read_ptr
)
19389 /* If the size of a host char is 8 bits, we can return a pointer
19390 to the string, otherwise we have to copy the string to a buffer
19391 allocated on the temporary obstack. */
19392 gdb_assert (HOST_CHAR_BIT
== 8);
19395 *bytes_read_ptr
= 1;
19398 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
19399 return (const char *) buf
;
19402 /* Return pointer to string at section SECT offset STR_OFFSET with error
19403 reporting strings FORM_NAME and SECT_NAME. */
19405 static const char *
19406 read_indirect_string_at_offset_from (struct objfile
*objfile
,
19407 bfd
*abfd
, LONGEST str_offset
,
19408 struct dwarf2_section_info
*sect
,
19409 const char *form_name
,
19410 const char *sect_name
)
19412 dwarf2_read_section (objfile
, sect
);
19413 if (sect
->buffer
== NULL
)
19414 error (_("%s used without %s section [in module %s]"),
19415 form_name
, sect_name
, bfd_get_filename (abfd
));
19416 if (str_offset
>= sect
->size
)
19417 error (_("%s pointing outside of %s section [in module %s]"),
19418 form_name
, sect_name
, bfd_get_filename (abfd
));
19419 gdb_assert (HOST_CHAR_BIT
== 8);
19420 if (sect
->buffer
[str_offset
] == '\0')
19422 return (const char *) (sect
->buffer
+ str_offset
);
19425 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19427 static const char *
19428 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19429 bfd
*abfd
, LONGEST str_offset
)
19431 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19433 &dwarf2_per_objfile
->str
,
19434 "DW_FORM_strp", ".debug_str");
19437 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
19439 static const char *
19440 read_indirect_line_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19441 bfd
*abfd
, LONGEST str_offset
)
19443 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19445 &dwarf2_per_objfile
->line_str
,
19446 "DW_FORM_line_strp",
19447 ".debug_line_str");
19450 /* Read a string at offset STR_OFFSET in the .debug_str section from
19451 the .dwz file DWZ. Throw an error if the offset is too large. If
19452 the string consists of a single NUL byte, return NULL; otherwise
19453 return a pointer to the string. */
19455 static const char *
19456 read_indirect_string_from_dwz (struct objfile
*objfile
, struct dwz_file
*dwz
,
19457 LONGEST str_offset
)
19459 dwarf2_read_section (objfile
, &dwz
->str
);
19461 if (dwz
->str
.buffer
== NULL
)
19462 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
19463 "section [in module %s]"),
19464 bfd_get_filename (dwz
->dwz_bfd
));
19465 if (str_offset
>= dwz
->str
.size
)
19466 error (_("DW_FORM_GNU_strp_alt pointing outside of "
19467 ".debug_str section [in module %s]"),
19468 bfd_get_filename (dwz
->dwz_bfd
));
19469 gdb_assert (HOST_CHAR_BIT
== 8);
19470 if (dwz
->str
.buffer
[str_offset
] == '\0')
19472 return (const char *) (dwz
->str
.buffer
+ str_offset
);
19475 /* Return pointer to string at .debug_str offset as read from BUF.
19476 BUF is assumed to be in a compilation unit described by CU_HEADER.
19477 Return *BYTES_READ_PTR count of bytes read from BUF. */
19479 static const char *
19480 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19481 const gdb_byte
*buf
,
19482 const struct comp_unit_head
*cu_header
,
19483 unsigned int *bytes_read_ptr
)
19485 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19487 return read_indirect_string_at_offset (dwarf2_per_objfile
, abfd
, str_offset
);
19490 /* Return pointer to string at .debug_line_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_line_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19496 bfd
*abfd
, 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_line_string_at_offset (dwarf2_per_objfile
, abfd
,
19507 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19508 unsigned int *bytes_read_ptr
)
19511 unsigned int num_read
;
19513 unsigned char byte
;
19520 byte
= bfd_get_8 (abfd
, buf
);
19523 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19524 if ((byte
& 128) == 0)
19530 *bytes_read_ptr
= num_read
;
19535 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19536 unsigned int *bytes_read_ptr
)
19539 int shift
, num_read
;
19540 unsigned char byte
;
19547 byte
= bfd_get_8 (abfd
, buf
);
19550 result
|= ((LONGEST
) (byte
& 127) << shift
);
19552 if ((byte
& 128) == 0)
19557 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
19558 result
|= -(((LONGEST
) 1) << shift
);
19559 *bytes_read_ptr
= num_read
;
19563 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19564 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
19565 ADDR_SIZE is the size of addresses from the CU header. */
19568 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19569 unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
19571 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19572 bfd
*abfd
= objfile
->obfd
;
19573 const gdb_byte
*info_ptr
;
19575 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
19576 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19577 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19578 objfile_name (objfile
));
19579 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
19580 error (_("DW_FORM_addr_index pointing outside of "
19581 ".debug_addr section [in module %s]"),
19582 objfile_name (objfile
));
19583 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19584 + addr_base
+ addr_index
* addr_size
);
19585 if (addr_size
== 4)
19586 return bfd_get_32 (abfd
, info_ptr
);
19588 return bfd_get_64 (abfd
, info_ptr
);
19591 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19594 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19596 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19597 cu
->addr_base
, cu
->header
.addr_size
);
19600 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19603 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19604 unsigned int *bytes_read
)
19606 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19607 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19609 return read_addr_index (cu
, addr_index
);
19612 /* Data structure to pass results from dwarf2_read_addr_index_reader
19613 back to dwarf2_read_addr_index. */
19615 struct dwarf2_read_addr_index_data
19617 ULONGEST addr_base
;
19621 /* die_reader_func for dwarf2_read_addr_index. */
19624 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
19625 const gdb_byte
*info_ptr
,
19626 struct die_info
*comp_unit_die
,
19630 struct dwarf2_cu
*cu
= reader
->cu
;
19631 struct dwarf2_read_addr_index_data
*aidata
=
19632 (struct dwarf2_read_addr_index_data
*) data
;
19634 aidata
->addr_base
= cu
->addr_base
;
19635 aidata
->addr_size
= cu
->header
.addr_size
;
19638 /* Given an index in .debug_addr, fetch the value.
19639 NOTE: This can be called during dwarf expression evaluation,
19640 long after the debug information has been read, and thus per_cu->cu
19641 may no longer exist. */
19644 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
19645 unsigned int addr_index
)
19647 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19648 struct dwarf2_cu
*cu
= per_cu
->cu
;
19649 ULONGEST addr_base
;
19652 /* We need addr_base and addr_size.
19653 If we don't have PER_CU->cu, we have to get it.
19654 Nasty, but the alternative is storing the needed info in PER_CU,
19655 which at this point doesn't seem justified: it's not clear how frequently
19656 it would get used and it would increase the size of every PER_CU.
19657 Entry points like dwarf2_per_cu_addr_size do a similar thing
19658 so we're not in uncharted territory here.
19659 Alas we need to be a bit more complicated as addr_base is contained
19662 We don't need to read the entire CU(/TU).
19663 We just need the header and top level die.
19665 IWBN to use the aging mechanism to let us lazily later discard the CU.
19666 For now we skip this optimization. */
19670 addr_base
= cu
->addr_base
;
19671 addr_size
= cu
->header
.addr_size
;
19675 struct dwarf2_read_addr_index_data aidata
;
19677 /* Note: We can't use init_cutu_and_read_dies_simple here,
19678 we need addr_base. */
19679 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0,
19680 dwarf2_read_addr_index_reader
, &aidata
);
19681 addr_base
= aidata
.addr_base
;
19682 addr_size
= aidata
.addr_size
;
19685 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19689 /* Given a DW_FORM_GNU_str_index, fetch the string.
19690 This is only used by the Fission support. */
19692 static const char *
19693 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19695 struct dwarf2_cu
*cu
= reader
->cu
;
19696 struct dwarf2_per_objfile
*dwarf2_per_objfile
19697 = cu
->per_cu
->dwarf2_per_objfile
;
19698 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19699 const char *objf_name
= objfile_name (objfile
);
19700 bfd
*abfd
= objfile
->obfd
;
19701 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
19702 struct dwarf2_section_info
*str_offsets_section
=
19703 &reader
->dwo_file
->sections
.str_offsets
;
19704 const gdb_byte
*info_ptr
;
19705 ULONGEST str_offset
;
19706 static const char form_name
[] = "DW_FORM_GNU_str_index";
19708 dwarf2_read_section (objfile
, str_section
);
19709 dwarf2_read_section (objfile
, str_offsets_section
);
19710 if (str_section
->buffer
== NULL
)
19711 error (_("%s used without .debug_str.dwo section"
19712 " in CU at offset %s [in module %s]"),
19713 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19714 if (str_offsets_section
->buffer
== NULL
)
19715 error (_("%s used without .debug_str_offsets.dwo section"
19716 " in CU at offset %s [in module %s]"),
19717 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19718 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
19719 error (_("%s pointing outside of .debug_str_offsets.dwo"
19720 " section in CU at offset %s [in module %s]"),
19721 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19722 info_ptr
= (str_offsets_section
->buffer
19723 + str_index
* cu
->header
.offset_size
);
19724 if (cu
->header
.offset_size
== 4)
19725 str_offset
= bfd_get_32 (abfd
, info_ptr
);
19727 str_offset
= bfd_get_64 (abfd
, info_ptr
);
19728 if (str_offset
>= str_section
->size
)
19729 error (_("Offset from %s pointing outside of"
19730 " .debug_str.dwo section in CU at offset %s [in module %s]"),
19731 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
19732 return (const char *) (str_section
->buffer
+ str_offset
);
19735 /* Return the length of an LEB128 number in BUF. */
19738 leb128_size (const gdb_byte
*buf
)
19740 const gdb_byte
*begin
= buf
;
19746 if ((byte
& 128) == 0)
19747 return buf
- begin
;
19752 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
19761 cu
->language
= language_c
;
19764 case DW_LANG_C_plus_plus
:
19765 case DW_LANG_C_plus_plus_11
:
19766 case DW_LANG_C_plus_plus_14
:
19767 cu
->language
= language_cplus
;
19770 cu
->language
= language_d
;
19772 case DW_LANG_Fortran77
:
19773 case DW_LANG_Fortran90
:
19774 case DW_LANG_Fortran95
:
19775 case DW_LANG_Fortran03
:
19776 case DW_LANG_Fortran08
:
19777 cu
->language
= language_fortran
;
19780 cu
->language
= language_go
;
19782 case DW_LANG_Mips_Assembler
:
19783 cu
->language
= language_asm
;
19785 case DW_LANG_Ada83
:
19786 case DW_LANG_Ada95
:
19787 cu
->language
= language_ada
;
19789 case DW_LANG_Modula2
:
19790 cu
->language
= language_m2
;
19792 case DW_LANG_Pascal83
:
19793 cu
->language
= language_pascal
;
19796 cu
->language
= language_objc
;
19799 case DW_LANG_Rust_old
:
19800 cu
->language
= language_rust
;
19802 case DW_LANG_Cobol74
:
19803 case DW_LANG_Cobol85
:
19805 cu
->language
= language_minimal
;
19808 cu
->language_defn
= language_def (cu
->language
);
19811 /* Return the named attribute or NULL if not there. */
19813 static struct attribute
*
19814 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19819 struct attribute
*spec
= NULL
;
19821 for (i
= 0; i
< die
->num_attrs
; ++i
)
19823 if (die
->attrs
[i
].name
== name
)
19824 return &die
->attrs
[i
];
19825 if (die
->attrs
[i
].name
== DW_AT_specification
19826 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
19827 spec
= &die
->attrs
[i
];
19833 die
= follow_die_ref (die
, spec
, &cu
);
19839 /* Return the named attribute or NULL if not there,
19840 but do not follow DW_AT_specification, etc.
19841 This is for use in contexts where we're reading .debug_types dies.
19842 Following DW_AT_specification, DW_AT_abstract_origin will take us
19843 back up the chain, and we want to go down. */
19845 static struct attribute
*
19846 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
19850 for (i
= 0; i
< die
->num_attrs
; ++i
)
19851 if (die
->attrs
[i
].name
== name
)
19852 return &die
->attrs
[i
];
19857 /* Return the string associated with a string-typed attribute, or NULL if it
19858 is either not found or is of an incorrect type. */
19860 static const char *
19861 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
19863 struct attribute
*attr
;
19864 const char *str
= NULL
;
19866 attr
= dwarf2_attr (die
, name
, cu
);
19870 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
19871 || attr
->form
== DW_FORM_string
19872 || attr
->form
== DW_FORM_GNU_str_index
19873 || attr
->form
== DW_FORM_GNU_strp_alt
)
19874 str
= DW_STRING (attr
);
19876 complaint (&symfile_complaints
,
19877 _("string type expected for attribute %s for "
19878 "DIE at %s in module %s"),
19879 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
19880 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
19886 /* Return non-zero iff the attribute NAME is defined for the given DIE,
19887 and holds a non-zero value. This function should only be used for
19888 DW_FORM_flag or DW_FORM_flag_present attributes. */
19891 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
19893 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
19895 return (attr
&& DW_UNSND (attr
));
19899 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
19901 /* A DIE is a declaration if it has a DW_AT_declaration attribute
19902 which value is non-zero. However, we have to be careful with
19903 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
19904 (via dwarf2_flag_true_p) follows this attribute. So we may
19905 end up accidently finding a declaration attribute that belongs
19906 to a different DIE referenced by the specification attribute,
19907 even though the given DIE does not have a declaration attribute. */
19908 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
19909 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
19912 /* Return the die giving the specification for DIE, if there is
19913 one. *SPEC_CU is the CU containing DIE on input, and the CU
19914 containing the return value on output. If there is no
19915 specification, but there is an abstract origin, that is
19918 static struct die_info
*
19919 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
19921 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
19924 if (spec_attr
== NULL
)
19925 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
19927 if (spec_attr
== NULL
)
19930 return follow_die_ref (die
, spec_attr
, spec_cu
);
19933 /* Stub for free_line_header to match void * callback types. */
19936 free_line_header_voidp (void *arg
)
19938 struct line_header
*lh
= (struct line_header
*) arg
;
19944 line_header::add_include_dir (const char *include_dir
)
19946 if (dwarf_line_debug
>= 2)
19947 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
19948 include_dirs
.size () + 1, include_dir
);
19950 include_dirs
.push_back (include_dir
);
19954 line_header::add_file_name (const char *name
,
19956 unsigned int mod_time
,
19957 unsigned int length
)
19959 if (dwarf_line_debug
>= 2)
19960 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
19961 (unsigned) file_names
.size () + 1, name
);
19963 file_names
.emplace_back (name
, d_index
, mod_time
, length
);
19966 /* A convenience function to find the proper .debug_line section for a CU. */
19968 static struct dwarf2_section_info
*
19969 get_debug_line_section (struct dwarf2_cu
*cu
)
19971 struct dwarf2_section_info
*section
;
19972 struct dwarf2_per_objfile
*dwarf2_per_objfile
19973 = cu
->per_cu
->dwarf2_per_objfile
;
19975 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
19977 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
19978 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
19979 else if (cu
->per_cu
->is_dwz
)
19981 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19983 section
= &dwz
->line
;
19986 section
= &dwarf2_per_objfile
->line
;
19991 /* Read directory or file name entry format, starting with byte of
19992 format count entries, ULEB128 pairs of entry formats, ULEB128 of
19993 entries count and the entries themselves in the described entry
19997 read_formatted_entries (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19998 bfd
*abfd
, const gdb_byte
**bufp
,
19999 struct line_header
*lh
,
20000 const struct comp_unit_head
*cu_header
,
20001 void (*callback
) (struct line_header
*lh
,
20004 unsigned int mod_time
,
20005 unsigned int length
))
20007 gdb_byte format_count
, formati
;
20008 ULONGEST data_count
, datai
;
20009 const gdb_byte
*buf
= *bufp
;
20010 const gdb_byte
*format_header_data
;
20011 unsigned int bytes_read
;
20013 format_count
= read_1_byte (abfd
, buf
);
20015 format_header_data
= buf
;
20016 for (formati
= 0; formati
< format_count
; formati
++)
20018 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20020 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20024 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20026 for (datai
= 0; datai
< data_count
; datai
++)
20028 const gdb_byte
*format
= format_header_data
;
20029 struct file_entry fe
;
20031 for (formati
= 0; formati
< format_count
; formati
++)
20033 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20034 format
+= bytes_read
;
20036 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20037 format
+= bytes_read
;
20039 gdb::optional
<const char *> string
;
20040 gdb::optional
<unsigned int> uint
;
20044 case DW_FORM_string
:
20045 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
20049 case DW_FORM_line_strp
:
20050 string
.emplace (read_indirect_line_string (dwarf2_per_objfile
,
20057 case DW_FORM_data1
:
20058 uint
.emplace (read_1_byte (abfd
, buf
));
20062 case DW_FORM_data2
:
20063 uint
.emplace (read_2_bytes (abfd
, buf
));
20067 case DW_FORM_data4
:
20068 uint
.emplace (read_4_bytes (abfd
, buf
));
20072 case DW_FORM_data8
:
20073 uint
.emplace (read_8_bytes (abfd
, buf
));
20077 case DW_FORM_udata
:
20078 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
20082 case DW_FORM_block
:
20083 /* It is valid only for DW_LNCT_timestamp which is ignored by
20088 switch (content_type
)
20091 if (string
.has_value ())
20094 case DW_LNCT_directory_index
:
20095 if (uint
.has_value ())
20096 fe
.d_index
= (dir_index
) *uint
;
20098 case DW_LNCT_timestamp
:
20099 if (uint
.has_value ())
20100 fe
.mod_time
= *uint
;
20103 if (uint
.has_value ())
20109 complaint (&symfile_complaints
,
20110 _("Unknown format content type %s"),
20111 pulongest (content_type
));
20115 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
20121 /* Read the statement program header starting at OFFSET in
20122 .debug_line, or .debug_line.dwo. Return a pointer
20123 to a struct line_header, allocated using xmalloc.
20124 Returns NULL if there is a problem reading the header, e.g., if it
20125 has a version we don't understand.
20127 NOTE: the strings in the include directory and file name tables of
20128 the returned object point into the dwarf line section buffer,
20129 and must not be freed. */
20131 static line_header_up
20132 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
20134 const gdb_byte
*line_ptr
;
20135 unsigned int bytes_read
, offset_size
;
20137 const char *cur_dir
, *cur_file
;
20138 struct dwarf2_section_info
*section
;
20140 struct dwarf2_per_objfile
*dwarf2_per_objfile
20141 = cu
->per_cu
->dwarf2_per_objfile
;
20143 section
= get_debug_line_section (cu
);
20144 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
20145 if (section
->buffer
== NULL
)
20147 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20148 complaint (&symfile_complaints
, _("missing .debug_line.dwo section"));
20150 complaint (&symfile_complaints
, _("missing .debug_line section"));
20154 /* We can't do this until we know the section is non-empty.
20155 Only then do we know we have such a section. */
20156 abfd
= get_section_bfd_owner (section
);
20158 /* Make sure that at least there's room for the total_length field.
20159 That could be 12 bytes long, but we're just going to fudge that. */
20160 if (to_underlying (sect_off
) + 4 >= section
->size
)
20162 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20166 line_header_up
lh (new line_header ());
20168 lh
->sect_off
= sect_off
;
20169 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
20171 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
20173 /* Read in the header. */
20175 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
20176 &bytes_read
, &offset_size
);
20177 line_ptr
+= bytes_read
;
20178 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
20180 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20183 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
20184 lh
->version
= read_2_bytes (abfd
, line_ptr
);
20186 if (lh
->version
> 5)
20188 /* This is a version we don't understand. The format could have
20189 changed in ways we don't handle properly so just punt. */
20190 complaint (&symfile_complaints
,
20191 _("unsupported version in .debug_line section"));
20194 if (lh
->version
>= 5)
20196 gdb_byte segment_selector_size
;
20198 /* Skip address size. */
20199 read_1_byte (abfd
, line_ptr
);
20202 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
20204 if (segment_selector_size
!= 0)
20206 complaint (&symfile_complaints
,
20207 _("unsupported segment selector size %u "
20208 "in .debug_line section"),
20209 segment_selector_size
);
20213 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
20214 line_ptr
+= offset_size
;
20215 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
20217 if (lh
->version
>= 4)
20219 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
20223 lh
->maximum_ops_per_instruction
= 1;
20225 if (lh
->maximum_ops_per_instruction
== 0)
20227 lh
->maximum_ops_per_instruction
= 1;
20228 complaint (&symfile_complaints
,
20229 _("invalid maximum_ops_per_instruction "
20230 "in `.debug_line' section"));
20233 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
20235 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
20237 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
20239 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
20241 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
20243 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
20244 for (i
= 1; i
< lh
->opcode_base
; ++i
)
20246 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
20250 if (lh
->version
>= 5)
20252 /* Read directory table. */
20253 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20255 [] (struct line_header
*lh
, const char *name
,
20256 dir_index d_index
, unsigned int mod_time
,
20257 unsigned int length
)
20259 lh
->add_include_dir (name
);
20262 /* Read file name table. */
20263 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20265 [] (struct line_header
*lh
, const char *name
,
20266 dir_index d_index
, unsigned int mod_time
,
20267 unsigned int length
)
20269 lh
->add_file_name (name
, d_index
, mod_time
, length
);
20274 /* Read directory table. */
20275 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20277 line_ptr
+= bytes_read
;
20278 lh
->add_include_dir (cur_dir
);
20280 line_ptr
+= bytes_read
;
20282 /* Read file name table. */
20283 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20285 unsigned int mod_time
, length
;
20288 line_ptr
+= bytes_read
;
20289 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20290 line_ptr
+= bytes_read
;
20291 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20292 line_ptr
+= bytes_read
;
20293 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20294 line_ptr
+= bytes_read
;
20296 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
20298 line_ptr
+= bytes_read
;
20300 lh
->statement_program_start
= line_ptr
;
20302 if (line_ptr
> (section
->buffer
+ section
->size
))
20303 complaint (&symfile_complaints
,
20304 _("line number info header doesn't "
20305 "fit in `.debug_line' section"));
20310 /* Subroutine of dwarf_decode_lines to simplify it.
20311 Return the file name of the psymtab for included file FILE_INDEX
20312 in line header LH of PST.
20313 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20314 If space for the result is malloc'd, *NAME_HOLDER will be set.
20315 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
20317 static const char *
20318 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
20319 const struct partial_symtab
*pst
,
20320 const char *comp_dir
,
20321 gdb::unique_xmalloc_ptr
<char> *name_holder
)
20323 const file_entry
&fe
= lh
->file_names
[file_index
];
20324 const char *include_name
= fe
.name
;
20325 const char *include_name_to_compare
= include_name
;
20326 const char *pst_filename
;
20329 const char *dir_name
= fe
.include_dir (lh
);
20331 gdb::unique_xmalloc_ptr
<char> hold_compare
;
20332 if (!IS_ABSOLUTE_PATH (include_name
)
20333 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
20335 /* Avoid creating a duplicate psymtab for PST.
20336 We do this by comparing INCLUDE_NAME and PST_FILENAME.
20337 Before we do the comparison, however, we need to account
20338 for DIR_NAME and COMP_DIR.
20339 First prepend dir_name (if non-NULL). If we still don't
20340 have an absolute path prepend comp_dir (if non-NULL).
20341 However, the directory we record in the include-file's
20342 psymtab does not contain COMP_DIR (to match the
20343 corresponding symtab(s)).
20348 bash$ gcc -g ./hello.c
20349 include_name = "hello.c"
20351 DW_AT_comp_dir = comp_dir = "/tmp"
20352 DW_AT_name = "./hello.c"
20356 if (dir_name
!= NULL
)
20358 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
20359 include_name
, (char *) NULL
));
20360 include_name
= name_holder
->get ();
20361 include_name_to_compare
= include_name
;
20363 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
20365 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
20366 include_name
, (char *) NULL
));
20367 include_name_to_compare
= hold_compare
.get ();
20371 pst_filename
= pst
->filename
;
20372 gdb::unique_xmalloc_ptr
<char> copied_name
;
20373 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
20375 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
20376 pst_filename
, (char *) NULL
));
20377 pst_filename
= copied_name
.get ();
20380 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
20384 return include_name
;
20387 /* State machine to track the state of the line number program. */
20389 class lnp_state_machine
20392 /* Initialize a machine state for the start of a line number
20394 lnp_state_machine (gdbarch
*arch
, line_header
*lh
, bool record_lines_p
);
20396 file_entry
*current_file ()
20398 /* lh->file_names is 0-based, but the file name numbers in the
20399 statement program are 1-based. */
20400 return m_line_header
->file_name_at (m_file
);
20403 /* Record the line in the state machine. END_SEQUENCE is true if
20404 we're processing the end of a sequence. */
20405 void record_line (bool end_sequence
);
20407 /* Check address and if invalid nop-out the rest of the lines in this
20409 void check_line_address (struct dwarf2_cu
*cu
,
20410 const gdb_byte
*line_ptr
,
20411 CORE_ADDR lowpc
, CORE_ADDR address
);
20413 void handle_set_discriminator (unsigned int discriminator
)
20415 m_discriminator
= discriminator
;
20416 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
20419 /* Handle DW_LNE_set_address. */
20420 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
20423 address
+= baseaddr
;
20424 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
20427 /* Handle DW_LNS_advance_pc. */
20428 void handle_advance_pc (CORE_ADDR adjust
);
20430 /* Handle a special opcode. */
20431 void handle_special_opcode (unsigned char op_code
);
20433 /* Handle DW_LNS_advance_line. */
20434 void handle_advance_line (int line_delta
)
20436 advance_line (line_delta
);
20439 /* Handle DW_LNS_set_file. */
20440 void handle_set_file (file_name_index file
);
20442 /* Handle DW_LNS_negate_stmt. */
20443 void handle_negate_stmt ()
20445 m_is_stmt
= !m_is_stmt
;
20448 /* Handle DW_LNS_const_add_pc. */
20449 void handle_const_add_pc ();
20451 /* Handle DW_LNS_fixed_advance_pc. */
20452 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
20454 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20458 /* Handle DW_LNS_copy. */
20459 void handle_copy ()
20461 record_line (false);
20462 m_discriminator
= 0;
20465 /* Handle DW_LNE_end_sequence. */
20466 void handle_end_sequence ()
20468 m_record_line_callback
= ::record_line
;
20472 /* Advance the line by LINE_DELTA. */
20473 void advance_line (int line_delta
)
20475 m_line
+= line_delta
;
20477 if (line_delta
!= 0)
20478 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20481 gdbarch
*m_gdbarch
;
20483 /* True if we're recording lines.
20484 Otherwise we're building partial symtabs and are just interested in
20485 finding include files mentioned by the line number program. */
20486 bool m_record_lines_p
;
20488 /* The line number header. */
20489 line_header
*m_line_header
;
20491 /* These are part of the standard DWARF line number state machine,
20492 and initialized according to the DWARF spec. */
20494 unsigned char m_op_index
= 0;
20495 /* The line table index (1-based) of the current file. */
20496 file_name_index m_file
= (file_name_index
) 1;
20497 unsigned int m_line
= 1;
20499 /* These are initialized in the constructor. */
20501 CORE_ADDR m_address
;
20503 unsigned int m_discriminator
;
20505 /* Additional bits of state we need to track. */
20507 /* The last file that we called dwarf2_start_subfile for.
20508 This is only used for TLLs. */
20509 unsigned int m_last_file
= 0;
20510 /* The last file a line number was recorded for. */
20511 struct subfile
*m_last_subfile
= NULL
;
20513 /* The function to call to record a line. */
20514 record_line_ftype
*m_record_line_callback
= NULL
;
20516 /* The last line number that was recorded, used to coalesce
20517 consecutive entries for the same line. This can happen, for
20518 example, when discriminators are present. PR 17276. */
20519 unsigned int m_last_line
= 0;
20520 bool m_line_has_non_zero_discriminator
= false;
20524 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
20526 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
20527 / m_line_header
->maximum_ops_per_instruction
)
20528 * m_line_header
->minimum_instruction_length
);
20529 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20530 m_op_index
= ((m_op_index
+ adjust
)
20531 % m_line_header
->maximum_ops_per_instruction
);
20535 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
20537 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
20538 CORE_ADDR addr_adj
= (((m_op_index
20539 + (adj_opcode
/ m_line_header
->line_range
))
20540 / m_line_header
->maximum_ops_per_instruction
)
20541 * m_line_header
->minimum_instruction_length
);
20542 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20543 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
20544 % m_line_header
->maximum_ops_per_instruction
);
20546 int line_delta
= (m_line_header
->line_base
20547 + (adj_opcode
% m_line_header
->line_range
));
20548 advance_line (line_delta
);
20549 record_line (false);
20550 m_discriminator
= 0;
20554 lnp_state_machine::handle_set_file (file_name_index file
)
20558 const file_entry
*fe
= current_file ();
20560 dwarf2_debug_line_missing_file_complaint ();
20561 else if (m_record_lines_p
)
20563 const char *dir
= fe
->include_dir (m_line_header
);
20565 m_last_subfile
= current_subfile
;
20566 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20567 dwarf2_start_subfile (fe
->name
, dir
);
20572 lnp_state_machine::handle_const_add_pc ()
20575 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
20578 = (((m_op_index
+ adjust
)
20579 / m_line_header
->maximum_ops_per_instruction
)
20580 * m_line_header
->minimum_instruction_length
);
20582 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20583 m_op_index
= ((m_op_index
+ adjust
)
20584 % m_line_header
->maximum_ops_per_instruction
);
20587 /* Ignore this record_line request. */
20590 noop_record_line (struct subfile
*subfile
, int line
, CORE_ADDR pc
)
20595 /* Return non-zero if we should add LINE to the line number table.
20596 LINE is the line to add, LAST_LINE is the last line that was added,
20597 LAST_SUBFILE is the subfile for LAST_LINE.
20598 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
20599 had a non-zero discriminator.
20601 We have to be careful in the presence of discriminators.
20602 E.g., for this line:
20604 for (i = 0; i < 100000; i++);
20606 clang can emit four line number entries for that one line,
20607 each with a different discriminator.
20608 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20610 However, we want gdb to coalesce all four entries into one.
20611 Otherwise the user could stepi into the middle of the line and
20612 gdb would get confused about whether the pc really was in the
20613 middle of the line.
20615 Things are further complicated by the fact that two consecutive
20616 line number entries for the same line is a heuristic used by gcc
20617 to denote the end of the prologue. So we can't just discard duplicate
20618 entries, we have to be selective about it. The heuristic we use is
20619 that we only collapse consecutive entries for the same line if at least
20620 one of those entries has a non-zero discriminator. PR 17276.
20622 Note: Addresses in the line number state machine can never go backwards
20623 within one sequence, thus this coalescing is ok. */
20626 dwarf_record_line_p (unsigned int line
, unsigned int last_line
,
20627 int line_has_non_zero_discriminator
,
20628 struct subfile
*last_subfile
)
20630 if (current_subfile
!= last_subfile
)
20632 if (line
!= last_line
)
20634 /* Same line for the same file that we've seen already.
20635 As a last check, for pr 17276, only record the line if the line
20636 has never had a non-zero discriminator. */
20637 if (!line_has_non_zero_discriminator
)
20642 /* Use P_RECORD_LINE to record line number LINE beginning at address ADDRESS
20643 in the line table of subfile SUBFILE. */
20646 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20647 unsigned int line
, CORE_ADDR address
,
20648 record_line_ftype p_record_line
)
20650 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20652 if (dwarf_line_debug
)
20654 fprintf_unfiltered (gdb_stdlog
,
20655 "Recording line %u, file %s, address %s\n",
20656 line
, lbasename (subfile
->name
),
20657 paddress (gdbarch
, address
));
20660 (*p_record_line
) (subfile
, line
, addr
);
20663 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20664 Mark the end of a set of line number records.
20665 The arguments are the same as for dwarf_record_line_1.
20666 If SUBFILE is NULL the request is ignored. */
20669 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20670 CORE_ADDR address
, record_line_ftype p_record_line
)
20672 if (subfile
== NULL
)
20675 if (dwarf_line_debug
)
20677 fprintf_unfiltered (gdb_stdlog
,
20678 "Finishing current line, file %s, address %s\n",
20679 lbasename (subfile
->name
),
20680 paddress (gdbarch
, address
));
20683 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, p_record_line
);
20687 lnp_state_machine::record_line (bool end_sequence
)
20689 if (dwarf_line_debug
)
20691 fprintf_unfiltered (gdb_stdlog
,
20692 "Processing actual line %u: file %u,"
20693 " address %s, is_stmt %u, discrim %u\n",
20694 m_line
, to_underlying (m_file
),
20695 paddress (m_gdbarch
, m_address
),
20696 m_is_stmt
, m_discriminator
);
20699 file_entry
*fe
= current_file ();
20702 dwarf2_debug_line_missing_file_complaint ();
20703 /* For now we ignore lines not starting on an instruction boundary.
20704 But not when processing end_sequence for compatibility with the
20705 previous version of the code. */
20706 else if (m_op_index
== 0 || end_sequence
)
20708 fe
->included_p
= 1;
20709 if (m_record_lines_p
&& m_is_stmt
)
20711 if (m_last_subfile
!= current_subfile
|| end_sequence
)
20713 dwarf_finish_line (m_gdbarch
, m_last_subfile
,
20714 m_address
, m_record_line_callback
);
20719 if (dwarf_record_line_p (m_line
, m_last_line
,
20720 m_line_has_non_zero_discriminator
,
20723 dwarf_record_line_1 (m_gdbarch
, current_subfile
,
20725 m_record_line_callback
);
20727 m_last_subfile
= current_subfile
;
20728 m_last_line
= m_line
;
20734 lnp_state_machine::lnp_state_machine (gdbarch
*arch
, line_header
*lh
,
20735 bool record_lines_p
)
20738 m_record_lines_p
= record_lines_p
;
20739 m_line_header
= lh
;
20741 m_record_line_callback
= ::record_line
;
20743 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
20744 was a line entry for it so that the backend has a chance to adjust it
20745 and also record it in case it needs it. This is currently used by MIPS
20746 code, cf. `mips_adjust_dwarf2_line'. */
20747 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
20748 m_is_stmt
= lh
->default_is_stmt
;
20749 m_discriminator
= 0;
20753 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
20754 const gdb_byte
*line_ptr
,
20755 CORE_ADDR lowpc
, CORE_ADDR address
)
20757 /* If address < lowpc then it's not a usable value, it's outside the
20758 pc range of the CU. However, we restrict the test to only address
20759 values of zero to preserve GDB's previous behaviour which is to
20760 handle the specific case of a function being GC'd by the linker. */
20762 if (address
== 0 && address
< lowpc
)
20764 /* This line table is for a function which has been
20765 GCd by the linker. Ignore it. PR gdb/12528 */
20767 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20768 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
20770 complaint (&symfile_complaints
,
20771 _(".debug_line address at offset 0x%lx is 0 [in module %s]"),
20772 line_offset
, objfile_name (objfile
));
20773 m_record_line_callback
= noop_record_line
;
20774 /* Note: record_line_callback is left as noop_record_line until
20775 we see DW_LNE_end_sequence. */
20779 /* Subroutine of dwarf_decode_lines to simplify it.
20780 Process the line number information in LH.
20781 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
20782 program in order to set included_p for every referenced header. */
20785 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
20786 const int decode_for_pst_p
, CORE_ADDR lowpc
)
20788 const gdb_byte
*line_ptr
, *extended_end
;
20789 const gdb_byte
*line_end
;
20790 unsigned int bytes_read
, extended_len
;
20791 unsigned char op_code
, extended_op
;
20792 CORE_ADDR baseaddr
;
20793 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
20794 bfd
*abfd
= objfile
->obfd
;
20795 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
20796 /* True if we're recording line info (as opposed to building partial
20797 symtabs and just interested in finding include files mentioned by
20798 the line number program). */
20799 bool record_lines_p
= !decode_for_pst_p
;
20801 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
20803 line_ptr
= lh
->statement_program_start
;
20804 line_end
= lh
->statement_program_end
;
20806 /* Read the statement sequences until there's nothing left. */
20807 while (line_ptr
< line_end
)
20809 /* The DWARF line number program state machine. Reset the state
20810 machine at the start of each sequence. */
20811 lnp_state_machine
state_machine (gdbarch
, lh
, record_lines_p
);
20812 bool end_sequence
= false;
20814 if (record_lines_p
)
20816 /* Start a subfile for the current file of the state
20818 const file_entry
*fe
= state_machine
.current_file ();
20821 dwarf2_start_subfile (fe
->name
, fe
->include_dir (lh
));
20824 /* Decode the table. */
20825 while (line_ptr
< line_end
&& !end_sequence
)
20827 op_code
= read_1_byte (abfd
, line_ptr
);
20830 if (op_code
>= lh
->opcode_base
)
20832 /* Special opcode. */
20833 state_machine
.handle_special_opcode (op_code
);
20835 else switch (op_code
)
20837 case DW_LNS_extended_op
:
20838 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
20840 line_ptr
+= bytes_read
;
20841 extended_end
= line_ptr
+ extended_len
;
20842 extended_op
= read_1_byte (abfd
, line_ptr
);
20844 switch (extended_op
)
20846 case DW_LNE_end_sequence
:
20847 state_machine
.handle_end_sequence ();
20848 end_sequence
= true;
20850 case DW_LNE_set_address
:
20853 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
20854 line_ptr
+= bytes_read
;
20856 state_machine
.check_line_address (cu
, line_ptr
,
20858 state_machine
.handle_set_address (baseaddr
, address
);
20861 case DW_LNE_define_file
:
20863 const char *cur_file
;
20864 unsigned int mod_time
, length
;
20867 cur_file
= read_direct_string (abfd
, line_ptr
,
20869 line_ptr
+= bytes_read
;
20870 dindex
= (dir_index
)
20871 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20872 line_ptr
+= bytes_read
;
20874 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20875 line_ptr
+= bytes_read
;
20877 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20878 line_ptr
+= bytes_read
;
20879 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
20882 case DW_LNE_set_discriminator
:
20884 /* The discriminator is not interesting to the
20885 debugger; just ignore it. We still need to
20886 check its value though:
20887 if there are consecutive entries for the same
20888 (non-prologue) line we want to coalesce them.
20891 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20892 line_ptr
+= bytes_read
;
20894 state_machine
.handle_set_discriminator (discr
);
20898 complaint (&symfile_complaints
,
20899 _("mangled .debug_line section"));
20902 /* Make sure that we parsed the extended op correctly. If e.g.
20903 we expected a different address size than the producer used,
20904 we may have read the wrong number of bytes. */
20905 if (line_ptr
!= extended_end
)
20907 complaint (&symfile_complaints
,
20908 _("mangled .debug_line section"));
20913 state_machine
.handle_copy ();
20915 case DW_LNS_advance_pc
:
20918 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20919 line_ptr
+= bytes_read
;
20921 state_machine
.handle_advance_pc (adjust
);
20924 case DW_LNS_advance_line
:
20927 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
20928 line_ptr
+= bytes_read
;
20930 state_machine
.handle_advance_line (line_delta
);
20933 case DW_LNS_set_file
:
20935 file_name_index file
20936 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
20938 line_ptr
+= bytes_read
;
20940 state_machine
.handle_set_file (file
);
20943 case DW_LNS_set_column
:
20944 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20945 line_ptr
+= bytes_read
;
20947 case DW_LNS_negate_stmt
:
20948 state_machine
.handle_negate_stmt ();
20950 case DW_LNS_set_basic_block
:
20952 /* Add to the address register of the state machine the
20953 address increment value corresponding to special opcode
20954 255. I.e., this value is scaled by the minimum
20955 instruction length since special opcode 255 would have
20956 scaled the increment. */
20957 case DW_LNS_const_add_pc
:
20958 state_machine
.handle_const_add_pc ();
20960 case DW_LNS_fixed_advance_pc
:
20962 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
20965 state_machine
.handle_fixed_advance_pc (addr_adj
);
20970 /* Unknown standard opcode, ignore it. */
20973 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
20975 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20976 line_ptr
+= bytes_read
;
20983 dwarf2_debug_line_missing_end_sequence_complaint ();
20985 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
20986 in which case we still finish recording the last line). */
20987 state_machine
.record_line (true);
20991 /* Decode the Line Number Program (LNP) for the given line_header
20992 structure and CU. The actual information extracted and the type
20993 of structures created from the LNP depends on the value of PST.
20995 1. If PST is NULL, then this procedure uses the data from the program
20996 to create all necessary symbol tables, and their linetables.
20998 2. If PST is not NULL, this procedure reads the program to determine
20999 the list of files included by the unit represented by PST, and
21000 builds all the associated partial symbol tables.
21002 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
21003 It is used for relative paths in the line table.
21004 NOTE: When processing partial symtabs (pst != NULL),
21005 comp_dir == pst->dirname.
21007 NOTE: It is important that psymtabs have the same file name (via strcmp)
21008 as the corresponding symtab. Since COMP_DIR is not used in the name of the
21009 symtab we don't use it in the name of the psymtabs we create.
21010 E.g. expand_line_sal requires this when finding psymtabs to expand.
21011 A good testcase for this is mb-inline.exp.
21013 LOWPC is the lowest address in CU (or 0 if not known).
21015 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
21016 for its PC<->lines mapping information. Otherwise only the filename
21017 table is read in. */
21020 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
21021 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
21022 CORE_ADDR lowpc
, int decode_mapping
)
21024 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21025 const int decode_for_pst_p
= (pst
!= NULL
);
21027 if (decode_mapping
)
21028 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
21030 if (decode_for_pst_p
)
21034 /* Now that we're done scanning the Line Header Program, we can
21035 create the psymtab of each included file. */
21036 for (file_index
= 0; file_index
< lh
->file_names
.size (); file_index
++)
21037 if (lh
->file_names
[file_index
].included_p
== 1)
21039 gdb::unique_xmalloc_ptr
<char> name_holder
;
21040 const char *include_name
=
21041 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
,
21043 if (include_name
!= NULL
)
21044 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
21049 /* Make sure a symtab is created for every file, even files
21050 which contain only variables (i.e. no code with associated
21052 struct compunit_symtab
*cust
= buildsym_compunit_symtab ();
21055 for (i
= 0; i
< lh
->file_names
.size (); i
++)
21057 file_entry
&fe
= lh
->file_names
[i
];
21059 dwarf2_start_subfile (fe
.name
, fe
.include_dir (lh
));
21061 if (current_subfile
->symtab
== NULL
)
21063 current_subfile
->symtab
21064 = allocate_symtab (cust
, current_subfile
->name
);
21066 fe
.symtab
= current_subfile
->symtab
;
21071 /* Start a subfile for DWARF. FILENAME is the name of the file and
21072 DIRNAME the name of the source directory which contains FILENAME
21073 or NULL if not known.
21074 This routine tries to keep line numbers from identical absolute and
21075 relative file names in a common subfile.
21077 Using the `list' example from the GDB testsuite, which resides in
21078 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
21079 of /srcdir/list0.c yields the following debugging information for list0.c:
21081 DW_AT_name: /srcdir/list0.c
21082 DW_AT_comp_dir: /compdir
21083 files.files[0].name: list0.h
21084 files.files[0].dir: /srcdir
21085 files.files[1].name: list0.c
21086 files.files[1].dir: /srcdir
21088 The line number information for list0.c has to end up in a single
21089 subfile, so that `break /srcdir/list0.c:1' works as expected.
21090 start_subfile will ensure that this happens provided that we pass the
21091 concatenation of files.files[1].dir and files.files[1].name as the
21095 dwarf2_start_subfile (const char *filename
, const char *dirname
)
21099 /* In order not to lose the line information directory,
21100 we concatenate it to the filename when it makes sense.
21101 Note that the Dwarf3 standard says (speaking of filenames in line
21102 information): ``The directory index is ignored for file names
21103 that represent full path names''. Thus ignoring dirname in the
21104 `else' branch below isn't an issue. */
21106 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
21108 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
21112 start_subfile (filename
);
21118 /* Start a symtab for DWARF.
21119 NAME, COMP_DIR, LOW_PC are passed to start_symtab. */
21121 static struct compunit_symtab
*
21122 dwarf2_start_symtab (struct dwarf2_cu
*cu
,
21123 const char *name
, const char *comp_dir
, CORE_ADDR low_pc
)
21125 struct compunit_symtab
*cust
21126 = start_symtab (cu
->per_cu
->dwarf2_per_objfile
->objfile
, name
, comp_dir
,
21127 low_pc
, cu
->language
);
21129 record_debugformat ("DWARF 2");
21130 record_producer (cu
->producer
);
21132 /* We assume that we're processing GCC output. */
21133 processing_gcc_compilation
= 2;
21135 cu
->processing_has_namespace_info
= 0;
21141 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
21142 struct dwarf2_cu
*cu
)
21144 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21145 struct comp_unit_head
*cu_header
= &cu
->header
;
21147 /* NOTE drow/2003-01-30: There used to be a comment and some special
21148 code here to turn a symbol with DW_AT_external and a
21149 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
21150 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
21151 with some versions of binutils) where shared libraries could have
21152 relocations against symbols in their debug information - the
21153 minimal symbol would have the right address, but the debug info
21154 would not. It's no longer necessary, because we will explicitly
21155 apply relocations when we read in the debug information now. */
21157 /* A DW_AT_location attribute with no contents indicates that a
21158 variable has been optimized away. */
21159 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
21161 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21165 /* Handle one degenerate form of location expression specially, to
21166 preserve GDB's previous behavior when section offsets are
21167 specified. If this is just a DW_OP_addr or DW_OP_GNU_addr_index
21168 then mark this symbol as LOC_STATIC. */
21170 if (attr_form_is_block (attr
)
21171 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
21172 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
21173 || (DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
21174 && (DW_BLOCK (attr
)->size
21175 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
21177 unsigned int dummy
;
21179 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
21180 SYMBOL_VALUE_ADDRESS (sym
) =
21181 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
21183 SYMBOL_VALUE_ADDRESS (sym
) =
21184 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
21185 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
21186 fixup_symbol_section (sym
, objfile
);
21187 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
21188 SYMBOL_SECTION (sym
));
21192 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
21193 expression evaluator, and use LOC_COMPUTED only when necessary
21194 (i.e. when the value of a register or memory location is
21195 referenced, or a thread-local block, etc.). Then again, it might
21196 not be worthwhile. I'm assuming that it isn't unless performance
21197 or memory numbers show me otherwise. */
21199 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
21201 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
21202 cu
->has_loclist
= 1;
21205 /* Given a pointer to a DWARF information entry, figure out if we need
21206 to make a symbol table entry for it, and if so, create a new entry
21207 and return a pointer to it.
21208 If TYPE is NULL, determine symbol type from the die, otherwise
21209 used the passed type.
21210 If SPACE is not NULL, use it to hold the new symbol. If it is
21211 NULL, allocate a new symbol on the objfile's obstack. */
21213 static struct symbol
*
21214 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
21215 struct symbol
*space
)
21217 struct dwarf2_per_objfile
*dwarf2_per_objfile
21218 = cu
->per_cu
->dwarf2_per_objfile
;
21219 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21220 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21221 struct symbol
*sym
= NULL
;
21223 struct attribute
*attr
= NULL
;
21224 struct attribute
*attr2
= NULL
;
21225 CORE_ADDR baseaddr
;
21226 struct pending
**list_to_add
= NULL
;
21228 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
21230 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21232 name
= dwarf2_name (die
, cu
);
21235 const char *linkagename
;
21236 int suppress_add
= 0;
21241 sym
= allocate_symbol (objfile
);
21242 OBJSTAT (objfile
, n_syms
++);
21244 /* Cache this symbol's name and the name's demangled form (if any). */
21245 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
21246 linkagename
= dwarf2_physname (name
, die
, cu
);
21247 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
21249 /* Fortran does not have mangling standard and the mangling does differ
21250 between gfortran, iFort etc. */
21251 if (cu
->language
== language_fortran
21252 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
21253 symbol_set_demangled_name (&(sym
->ginfo
),
21254 dwarf2_full_name (name
, die
, cu
),
21257 /* Default assumptions.
21258 Use the passed type or decode it from the die. */
21259 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21260 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21262 SYMBOL_TYPE (sym
) = type
;
21264 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
21265 attr
= dwarf2_attr (die
,
21266 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
21270 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
21273 attr
= dwarf2_attr (die
,
21274 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
21278 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
21279 struct file_entry
*fe
;
21281 if (cu
->line_header
!= NULL
)
21282 fe
= cu
->line_header
->file_name_at (file_index
);
21287 complaint (&symfile_complaints
,
21288 _("file index out of range"));
21290 symbol_set_symtab (sym
, fe
->symtab
);
21296 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
21301 addr
= attr_value_as_address (attr
);
21302 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
21303 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
21305 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
21306 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
21307 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
21308 add_symbol_to_list (sym
, cu
->list_in_scope
);
21310 case DW_TAG_subprogram
:
21311 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21313 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21314 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21315 if ((attr2
&& (DW_UNSND (attr2
) != 0))
21316 || cu
->language
== language_ada
)
21318 /* Subprograms marked external are stored as a global symbol.
21319 Ada subprograms, whether marked external or not, are always
21320 stored as a global symbol, because we want to be able to
21321 access them globally. For instance, we want to be able
21322 to break on a nested subprogram without having to
21323 specify the context. */
21324 list_to_add
= &global_symbols
;
21328 list_to_add
= cu
->list_in_scope
;
21331 case DW_TAG_inlined_subroutine
:
21332 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21334 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21335 SYMBOL_INLINED (sym
) = 1;
21336 list_to_add
= cu
->list_in_scope
;
21338 case DW_TAG_template_value_param
:
21340 /* Fall through. */
21341 case DW_TAG_constant
:
21342 case DW_TAG_variable
:
21343 case DW_TAG_member
:
21344 /* Compilation with minimal debug info may result in
21345 variables with missing type entries. Change the
21346 misleading `void' type to something sensible. */
21347 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
21348 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
21350 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21351 /* In the case of DW_TAG_member, we should only be called for
21352 static const members. */
21353 if (die
->tag
== DW_TAG_member
)
21355 /* dwarf2_add_field uses die_is_declaration,
21356 so we do the same. */
21357 gdb_assert (die_is_declaration (die
, cu
));
21362 dwarf2_const_value (attr
, sym
, cu
);
21363 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21366 if (attr2
&& (DW_UNSND (attr2
) != 0))
21367 list_to_add
= &global_symbols
;
21369 list_to_add
= cu
->list_in_scope
;
21373 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21376 var_decode_location (attr
, sym
, cu
);
21377 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21379 /* Fortran explicitly imports any global symbols to the local
21380 scope by DW_TAG_common_block. */
21381 if (cu
->language
== language_fortran
&& die
->parent
21382 && die
->parent
->tag
== DW_TAG_common_block
)
21385 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21386 && SYMBOL_VALUE_ADDRESS (sym
) == 0
21387 && !dwarf2_per_objfile
->has_section_at_zero
)
21389 /* When a static variable is eliminated by the linker,
21390 the corresponding debug information is not stripped
21391 out, but the variable address is set to null;
21392 do not add such variables into symbol table. */
21394 else if (attr2
&& (DW_UNSND (attr2
) != 0))
21396 /* Workaround gfortran PR debug/40040 - it uses
21397 DW_AT_location for variables in -fPIC libraries which may
21398 get overriden by other libraries/executable and get
21399 a different address. Resolve it by the minimal symbol
21400 which may come from inferior's executable using copy
21401 relocation. Make this workaround only for gfortran as for
21402 other compilers GDB cannot guess the minimal symbol
21403 Fortran mangling kind. */
21404 if (cu
->language
== language_fortran
&& die
->parent
21405 && die
->parent
->tag
== DW_TAG_module
21407 && startswith (cu
->producer
, "GNU Fortran"))
21408 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21410 /* A variable with DW_AT_external is never static,
21411 but it may be block-scoped. */
21412 list_to_add
= (cu
->list_in_scope
== &file_symbols
21413 ? &global_symbols
: cu
->list_in_scope
);
21416 list_to_add
= cu
->list_in_scope
;
21420 /* We do not know the address of this symbol.
21421 If it is an external symbol and we have type information
21422 for it, enter the symbol as a LOC_UNRESOLVED symbol.
21423 The address of the variable will then be determined from
21424 the minimal symbol table whenever the variable is
21426 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21428 /* Fortran explicitly imports any global symbols to the local
21429 scope by DW_TAG_common_block. */
21430 if (cu
->language
== language_fortran
&& die
->parent
21431 && die
->parent
->tag
== DW_TAG_common_block
)
21433 /* SYMBOL_CLASS doesn't matter here because
21434 read_common_block is going to reset it. */
21436 list_to_add
= cu
->list_in_scope
;
21438 else if (attr2
&& (DW_UNSND (attr2
) != 0)
21439 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
21441 /* A variable with DW_AT_external is never static, but it
21442 may be block-scoped. */
21443 list_to_add
= (cu
->list_in_scope
== &file_symbols
21444 ? &global_symbols
: cu
->list_in_scope
);
21446 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21448 else if (!die_is_declaration (die
, cu
))
21450 /* Use the default LOC_OPTIMIZED_OUT class. */
21451 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
21453 list_to_add
= cu
->list_in_scope
;
21457 case DW_TAG_formal_parameter
:
21458 /* If we are inside a function, mark this as an argument. If
21459 not, we might be looking at an argument to an inlined function
21460 when we do not have enough information to show inlined frames;
21461 pretend it's a local variable in that case so that the user can
21463 if (context_stack_depth
> 0
21464 && context_stack
[context_stack_depth
- 1].name
!= NULL
)
21465 SYMBOL_IS_ARGUMENT (sym
) = 1;
21466 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21469 var_decode_location (attr
, sym
, cu
);
21471 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21474 dwarf2_const_value (attr
, sym
, cu
);
21477 list_to_add
= cu
->list_in_scope
;
21479 case DW_TAG_unspecified_parameters
:
21480 /* From varargs functions; gdb doesn't seem to have any
21481 interest in this information, so just ignore it for now.
21484 case DW_TAG_template_type_param
:
21486 /* Fall through. */
21487 case DW_TAG_class_type
:
21488 case DW_TAG_interface_type
:
21489 case DW_TAG_structure_type
:
21490 case DW_TAG_union_type
:
21491 case DW_TAG_set_type
:
21492 case DW_TAG_enumeration_type
:
21493 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21494 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
21497 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
21498 really ever be static objects: otherwise, if you try
21499 to, say, break of a class's method and you're in a file
21500 which doesn't mention that class, it won't work unless
21501 the check for all static symbols in lookup_symbol_aux
21502 saves you. See the OtherFileClass tests in
21503 gdb.c++/namespace.exp. */
21507 list_to_add
= (cu
->list_in_scope
== &file_symbols
21508 && cu
->language
== language_cplus
21509 ? &global_symbols
: cu
->list_in_scope
);
21511 /* The semantics of C++ state that "struct foo {
21512 ... }" also defines a typedef for "foo". */
21513 if (cu
->language
== language_cplus
21514 || cu
->language
== language_ada
21515 || cu
->language
== language_d
21516 || cu
->language
== language_rust
)
21518 /* The symbol's name is already allocated along
21519 with this objfile, so we don't need to
21520 duplicate it for the type. */
21521 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
21522 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
21527 case DW_TAG_typedef
:
21528 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21529 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21530 list_to_add
= cu
->list_in_scope
;
21532 case DW_TAG_base_type
:
21533 case DW_TAG_subrange_type
:
21534 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21535 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21536 list_to_add
= cu
->list_in_scope
;
21538 case DW_TAG_enumerator
:
21539 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21542 dwarf2_const_value (attr
, sym
, cu
);
21545 /* NOTE: carlton/2003-11-10: See comment above in the
21546 DW_TAG_class_type, etc. block. */
21548 list_to_add
= (cu
->list_in_scope
== &file_symbols
21549 && cu
->language
== language_cplus
21550 ? &global_symbols
: cu
->list_in_scope
);
21553 case DW_TAG_imported_declaration
:
21554 case DW_TAG_namespace
:
21555 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21556 list_to_add
= &global_symbols
;
21558 case DW_TAG_module
:
21559 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21560 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
21561 list_to_add
= &global_symbols
;
21563 case DW_TAG_common_block
:
21564 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
21565 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
21566 add_symbol_to_list (sym
, cu
->list_in_scope
);
21569 /* Not a tag we recognize. Hopefully we aren't processing
21570 trash data, but since we must specifically ignore things
21571 we don't recognize, there is nothing else we should do at
21573 complaint (&symfile_complaints
, _("unsupported tag: '%s'"),
21574 dwarf_tag_name (die
->tag
));
21580 sym
->hash_next
= objfile
->template_symbols
;
21581 objfile
->template_symbols
= sym
;
21582 list_to_add
= NULL
;
21585 if (list_to_add
!= NULL
)
21586 add_symbol_to_list (sym
, list_to_add
);
21588 /* For the benefit of old versions of GCC, check for anonymous
21589 namespaces based on the demangled name. */
21590 if (!cu
->processing_has_namespace_info
21591 && cu
->language
== language_cplus
)
21592 cp_scan_for_anonymous_namespaces (sym
, objfile
);
21597 /* Given an attr with a DW_FORM_dataN value in host byte order,
21598 zero-extend it as appropriate for the symbol's type. The DWARF
21599 standard (v4) is not entirely clear about the meaning of using
21600 DW_FORM_dataN for a constant with a signed type, where the type is
21601 wider than the data. The conclusion of a discussion on the DWARF
21602 list was that this is unspecified. We choose to always zero-extend
21603 because that is the interpretation long in use by GCC. */
21606 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21607 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21609 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21610 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21611 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21612 LONGEST l
= DW_UNSND (attr
);
21614 if (bits
< sizeof (*value
) * 8)
21616 l
&= ((LONGEST
) 1 << bits
) - 1;
21619 else if (bits
== sizeof (*value
) * 8)
21623 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21624 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21631 /* Read a constant value from an attribute. Either set *VALUE, or if
21632 the value does not fit in *VALUE, set *BYTES - either already
21633 allocated on the objfile obstack, or newly allocated on OBSTACK,
21634 or, set *BATON, if we translated the constant to a location
21638 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21639 const char *name
, struct obstack
*obstack
,
21640 struct dwarf2_cu
*cu
,
21641 LONGEST
*value
, const gdb_byte
**bytes
,
21642 struct dwarf2_locexpr_baton
**baton
)
21644 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21645 struct comp_unit_head
*cu_header
= &cu
->header
;
21646 struct dwarf_block
*blk
;
21647 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21648 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21654 switch (attr
->form
)
21657 case DW_FORM_GNU_addr_index
:
21661 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21662 dwarf2_const_value_length_mismatch_complaint (name
,
21663 cu_header
->addr_size
,
21664 TYPE_LENGTH (type
));
21665 /* Symbols of this form are reasonably rare, so we just
21666 piggyback on the existing location code rather than writing
21667 a new implementation of symbol_computed_ops. */
21668 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21669 (*baton
)->per_cu
= cu
->per_cu
;
21670 gdb_assert ((*baton
)->per_cu
);
21672 (*baton
)->size
= 2 + cu_header
->addr_size
;
21673 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21674 (*baton
)->data
= data
;
21676 data
[0] = DW_OP_addr
;
21677 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21678 byte_order
, DW_ADDR (attr
));
21679 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21682 case DW_FORM_string
:
21684 case DW_FORM_GNU_str_index
:
21685 case DW_FORM_GNU_strp_alt
:
21686 /* DW_STRING is already allocated on the objfile obstack, point
21688 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21690 case DW_FORM_block1
:
21691 case DW_FORM_block2
:
21692 case DW_FORM_block4
:
21693 case DW_FORM_block
:
21694 case DW_FORM_exprloc
:
21695 case DW_FORM_data16
:
21696 blk
= DW_BLOCK (attr
);
21697 if (TYPE_LENGTH (type
) != blk
->size
)
21698 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
21699 TYPE_LENGTH (type
));
21700 *bytes
= blk
->data
;
21703 /* The DW_AT_const_value attributes are supposed to carry the
21704 symbol's value "represented as it would be on the target
21705 architecture." By the time we get here, it's already been
21706 converted to host endianness, so we just need to sign- or
21707 zero-extend it as appropriate. */
21708 case DW_FORM_data1
:
21709 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
21711 case DW_FORM_data2
:
21712 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
21714 case DW_FORM_data4
:
21715 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
21717 case DW_FORM_data8
:
21718 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
21721 case DW_FORM_sdata
:
21722 case DW_FORM_implicit_const
:
21723 *value
= DW_SND (attr
);
21726 case DW_FORM_udata
:
21727 *value
= DW_UNSND (attr
);
21731 complaint (&symfile_complaints
,
21732 _("unsupported const value attribute form: '%s'"),
21733 dwarf_form_name (attr
->form
));
21740 /* Copy constant value from an attribute to a symbol. */
21743 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
21744 struct dwarf2_cu
*cu
)
21746 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21748 const gdb_byte
*bytes
;
21749 struct dwarf2_locexpr_baton
*baton
;
21751 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
21752 SYMBOL_PRINT_NAME (sym
),
21753 &objfile
->objfile_obstack
, cu
,
21754 &value
, &bytes
, &baton
);
21758 SYMBOL_LOCATION_BATON (sym
) = baton
;
21759 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
21761 else if (bytes
!= NULL
)
21763 SYMBOL_VALUE_BYTES (sym
) = bytes
;
21764 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
21768 SYMBOL_VALUE (sym
) = value
;
21769 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
21773 /* Return the type of the die in question using its DW_AT_type attribute. */
21775 static struct type
*
21776 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21778 struct attribute
*type_attr
;
21780 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
21783 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21784 /* A missing DW_AT_type represents a void type. */
21785 return objfile_type (objfile
)->builtin_void
;
21788 return lookup_die_type (die
, type_attr
, cu
);
21791 /* True iff CU's producer generates GNAT Ada auxiliary information
21792 that allows to find parallel types through that information instead
21793 of having to do expensive parallel lookups by type name. */
21796 need_gnat_info (struct dwarf2_cu
*cu
)
21798 /* Assume that the Ada compiler was GNAT, which always produces
21799 the auxiliary information. */
21800 return (cu
->language
== language_ada
);
21803 /* Return the auxiliary type of the die in question using its
21804 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
21805 attribute is not present. */
21807 static struct type
*
21808 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21810 struct attribute
*type_attr
;
21812 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
21816 return lookup_die_type (die
, type_attr
, cu
);
21819 /* If DIE has a descriptive_type attribute, then set the TYPE's
21820 descriptive type accordingly. */
21823 set_descriptive_type (struct type
*type
, struct die_info
*die
,
21824 struct dwarf2_cu
*cu
)
21826 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
21828 if (descriptive_type
)
21830 ALLOCATE_GNAT_AUX_TYPE (type
);
21831 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
21835 /* Return the containing type of the die in question using its
21836 DW_AT_containing_type attribute. */
21838 static struct type
*
21839 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
21841 struct attribute
*type_attr
;
21842 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21844 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
21846 error (_("Dwarf Error: Problem turning containing type into gdb type "
21847 "[in module %s]"), objfile_name (objfile
));
21849 return lookup_die_type (die
, type_attr
, cu
);
21852 /* Return an error marker type to use for the ill formed type in DIE/CU. */
21854 static struct type
*
21855 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
21857 struct dwarf2_per_objfile
*dwarf2_per_objfile
21858 = cu
->per_cu
->dwarf2_per_objfile
;
21859 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21860 char *message
, *saved
;
21862 message
= xstrprintf (_("<unknown type in %s, CU %s, DIE %s>"),
21863 objfile_name (objfile
),
21864 sect_offset_str (cu
->header
.sect_off
),
21865 sect_offset_str (die
->sect_off
));
21866 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
21867 message
, strlen (message
));
21870 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
21873 /* Look up the type of DIE in CU using its type attribute ATTR.
21874 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
21875 DW_AT_containing_type.
21876 If there is no type substitute an error marker. */
21878 static struct type
*
21879 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
21880 struct dwarf2_cu
*cu
)
21882 struct dwarf2_per_objfile
*dwarf2_per_objfile
21883 = cu
->per_cu
->dwarf2_per_objfile
;
21884 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21885 struct type
*this_type
;
21887 gdb_assert (attr
->name
== DW_AT_type
21888 || attr
->name
== DW_AT_GNAT_descriptive_type
21889 || attr
->name
== DW_AT_containing_type
);
21891 /* First see if we have it cached. */
21893 if (attr
->form
== DW_FORM_GNU_ref_alt
)
21895 struct dwarf2_per_cu_data
*per_cu
;
21896 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21898 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
21899 dwarf2_per_objfile
);
21900 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
21902 else if (attr_form_is_ref (attr
))
21904 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
21906 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
21908 else if (attr
->form
== DW_FORM_ref_sig8
)
21910 ULONGEST signature
= DW_SIGNATURE (attr
);
21912 return get_signatured_type (die
, signature
, cu
);
21916 complaint (&symfile_complaints
,
21917 _("Dwarf Error: Bad type attribute %s in DIE"
21918 " at %s [in module %s]"),
21919 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
21920 objfile_name (objfile
));
21921 return build_error_marker_type (cu
, die
);
21924 /* If not cached we need to read it in. */
21926 if (this_type
== NULL
)
21928 struct die_info
*type_die
= NULL
;
21929 struct dwarf2_cu
*type_cu
= cu
;
21931 if (attr_form_is_ref (attr
))
21932 type_die
= follow_die_ref (die
, attr
, &type_cu
);
21933 if (type_die
== NULL
)
21934 return build_error_marker_type (cu
, die
);
21935 /* If we find the type now, it's probably because the type came
21936 from an inter-CU reference and the type's CU got expanded before
21938 this_type
= read_type_die (type_die
, type_cu
);
21941 /* If we still don't have a type use an error marker. */
21943 if (this_type
== NULL
)
21944 return build_error_marker_type (cu
, die
);
21949 /* Return the type in DIE, CU.
21950 Returns NULL for invalid types.
21952 This first does a lookup in die_type_hash,
21953 and only reads the die in if necessary.
21955 NOTE: This can be called when reading in partial or full symbols. */
21957 static struct type
*
21958 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
21960 struct type
*this_type
;
21962 this_type
= get_die_type (die
, cu
);
21966 return read_type_die_1 (die
, cu
);
21969 /* Read the type in DIE, CU.
21970 Returns NULL for invalid types. */
21972 static struct type
*
21973 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
21975 struct type
*this_type
= NULL
;
21979 case DW_TAG_class_type
:
21980 case DW_TAG_interface_type
:
21981 case DW_TAG_structure_type
:
21982 case DW_TAG_union_type
:
21983 this_type
= read_structure_type (die
, cu
);
21985 case DW_TAG_enumeration_type
:
21986 this_type
= read_enumeration_type (die
, cu
);
21988 case DW_TAG_subprogram
:
21989 case DW_TAG_subroutine_type
:
21990 case DW_TAG_inlined_subroutine
:
21991 this_type
= read_subroutine_type (die
, cu
);
21993 case DW_TAG_array_type
:
21994 this_type
= read_array_type (die
, cu
);
21996 case DW_TAG_set_type
:
21997 this_type
= read_set_type (die
, cu
);
21999 case DW_TAG_pointer_type
:
22000 this_type
= read_tag_pointer_type (die
, cu
);
22002 case DW_TAG_ptr_to_member_type
:
22003 this_type
= read_tag_ptr_to_member_type (die
, cu
);
22005 case DW_TAG_reference_type
:
22006 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
22008 case DW_TAG_rvalue_reference_type
:
22009 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
22011 case DW_TAG_const_type
:
22012 this_type
= read_tag_const_type (die
, cu
);
22014 case DW_TAG_volatile_type
:
22015 this_type
= read_tag_volatile_type (die
, cu
);
22017 case DW_TAG_restrict_type
:
22018 this_type
= read_tag_restrict_type (die
, cu
);
22020 case DW_TAG_string_type
:
22021 this_type
= read_tag_string_type (die
, cu
);
22023 case DW_TAG_typedef
:
22024 this_type
= read_typedef (die
, cu
);
22026 case DW_TAG_subrange_type
:
22027 this_type
= read_subrange_type (die
, cu
);
22029 case DW_TAG_base_type
:
22030 this_type
= read_base_type (die
, cu
);
22032 case DW_TAG_unspecified_type
:
22033 this_type
= read_unspecified_type (die
, cu
);
22035 case DW_TAG_namespace
:
22036 this_type
= read_namespace_type (die
, cu
);
22038 case DW_TAG_module
:
22039 this_type
= read_module_type (die
, cu
);
22041 case DW_TAG_atomic_type
:
22042 this_type
= read_tag_atomic_type (die
, cu
);
22045 complaint (&symfile_complaints
,
22046 _("unexpected tag in read_type_die: '%s'"),
22047 dwarf_tag_name (die
->tag
));
22054 /* See if we can figure out if the class lives in a namespace. We do
22055 this by looking for a member function; its demangled name will
22056 contain namespace info, if there is any.
22057 Return the computed name or NULL.
22058 Space for the result is allocated on the objfile's obstack.
22059 This is the full-die version of guess_partial_die_structure_name.
22060 In this case we know DIE has no useful parent. */
22063 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22065 struct die_info
*spec_die
;
22066 struct dwarf2_cu
*spec_cu
;
22067 struct die_info
*child
;
22068 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22071 spec_die
= die_specification (die
, &spec_cu
);
22072 if (spec_die
!= NULL
)
22078 for (child
= die
->child
;
22080 child
= child
->sibling
)
22082 if (child
->tag
== DW_TAG_subprogram
)
22084 const char *linkage_name
= dw2_linkage_name (child
, cu
);
22086 if (linkage_name
!= NULL
)
22089 = language_class_name_from_physname (cu
->language_defn
,
22093 if (actual_name
!= NULL
)
22095 const char *die_name
= dwarf2_name (die
, cu
);
22097 if (die_name
!= NULL
22098 && strcmp (die_name
, actual_name
) != 0)
22100 /* Strip off the class name from the full name.
22101 We want the prefix. */
22102 int die_name_len
= strlen (die_name
);
22103 int actual_name_len
= strlen (actual_name
);
22105 /* Test for '::' as a sanity check. */
22106 if (actual_name_len
> die_name_len
+ 2
22107 && actual_name
[actual_name_len
22108 - die_name_len
- 1] == ':')
22109 name
= (char *) obstack_copy0 (
22110 &objfile
->per_bfd
->storage_obstack
,
22111 actual_name
, actual_name_len
- die_name_len
- 2);
22114 xfree (actual_name
);
22123 /* GCC might emit a nameless typedef that has a linkage name. Determine the
22124 prefix part in such case. See
22125 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22127 static const char *
22128 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22130 struct attribute
*attr
;
22133 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
22134 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
22137 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
22140 attr
= dw2_linkage_name_attr (die
, cu
);
22141 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22144 /* dwarf2_name had to be already called. */
22145 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
22147 /* Strip the base name, keep any leading namespaces/classes. */
22148 base
= strrchr (DW_STRING (attr
), ':');
22149 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
22152 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22153 return (char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22155 &base
[-1] - DW_STRING (attr
));
22158 /* Return the name of the namespace/class that DIE is defined within,
22159 or "" if we can't tell. The caller should not xfree the result.
22161 For example, if we're within the method foo() in the following
22171 then determine_prefix on foo's die will return "N::C". */
22173 static const char *
22174 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22176 struct dwarf2_per_objfile
*dwarf2_per_objfile
22177 = cu
->per_cu
->dwarf2_per_objfile
;
22178 struct die_info
*parent
, *spec_die
;
22179 struct dwarf2_cu
*spec_cu
;
22180 struct type
*parent_type
;
22181 const char *retval
;
22183 if (cu
->language
!= language_cplus
22184 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
22185 && cu
->language
!= language_rust
)
22188 retval
= anonymous_struct_prefix (die
, cu
);
22192 /* We have to be careful in the presence of DW_AT_specification.
22193 For example, with GCC 3.4, given the code
22197 // Definition of N::foo.
22201 then we'll have a tree of DIEs like this:
22203 1: DW_TAG_compile_unit
22204 2: DW_TAG_namespace // N
22205 3: DW_TAG_subprogram // declaration of N::foo
22206 4: DW_TAG_subprogram // definition of N::foo
22207 DW_AT_specification // refers to die #3
22209 Thus, when processing die #4, we have to pretend that we're in
22210 the context of its DW_AT_specification, namely the contex of die
22213 spec_die
= die_specification (die
, &spec_cu
);
22214 if (spec_die
== NULL
)
22215 parent
= die
->parent
;
22218 parent
= spec_die
->parent
;
22222 if (parent
== NULL
)
22224 else if (parent
->building_fullname
)
22227 const char *parent_name
;
22229 /* It has been seen on RealView 2.2 built binaries,
22230 DW_TAG_template_type_param types actually _defined_ as
22231 children of the parent class:
22234 template class <class Enum> Class{};
22235 Class<enum E> class_e;
22237 1: DW_TAG_class_type (Class)
22238 2: DW_TAG_enumeration_type (E)
22239 3: DW_TAG_enumerator (enum1:0)
22240 3: DW_TAG_enumerator (enum2:1)
22242 2: DW_TAG_template_type_param
22243 DW_AT_type DW_FORM_ref_udata (E)
22245 Besides being broken debug info, it can put GDB into an
22246 infinite loop. Consider:
22248 When we're building the full name for Class<E>, we'll start
22249 at Class, and go look over its template type parameters,
22250 finding E. We'll then try to build the full name of E, and
22251 reach here. We're now trying to build the full name of E,
22252 and look over the parent DIE for containing scope. In the
22253 broken case, if we followed the parent DIE of E, we'd again
22254 find Class, and once again go look at its template type
22255 arguments, etc., etc. Simply don't consider such parent die
22256 as source-level parent of this die (it can't be, the language
22257 doesn't allow it), and break the loop here. */
22258 name
= dwarf2_name (die
, cu
);
22259 parent_name
= dwarf2_name (parent
, cu
);
22260 complaint (&symfile_complaints
,
22261 _("template param type '%s' defined within parent '%s'"),
22262 name
? name
: "<unknown>",
22263 parent_name
? parent_name
: "<unknown>");
22267 switch (parent
->tag
)
22269 case DW_TAG_namespace
:
22270 parent_type
= read_type_die (parent
, cu
);
22271 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
22272 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
22273 Work around this problem here. */
22274 if (cu
->language
== language_cplus
22275 && strcmp (TYPE_TAG_NAME (parent_type
), "::") == 0)
22277 /* We give a name to even anonymous namespaces. */
22278 return TYPE_TAG_NAME (parent_type
);
22279 case DW_TAG_class_type
:
22280 case DW_TAG_interface_type
:
22281 case DW_TAG_structure_type
:
22282 case DW_TAG_union_type
:
22283 case DW_TAG_module
:
22284 parent_type
= read_type_die (parent
, cu
);
22285 if (TYPE_TAG_NAME (parent_type
) != NULL
)
22286 return TYPE_TAG_NAME (parent_type
);
22288 /* An anonymous structure is only allowed non-static data
22289 members; no typedefs, no member functions, et cetera.
22290 So it does not need a prefix. */
22292 case DW_TAG_compile_unit
:
22293 case DW_TAG_partial_unit
:
22294 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
22295 if (cu
->language
== language_cplus
22296 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
22297 && die
->child
!= NULL
22298 && (die
->tag
== DW_TAG_class_type
22299 || die
->tag
== DW_TAG_structure_type
22300 || die
->tag
== DW_TAG_union_type
))
22302 char *name
= guess_full_die_structure_name (die
, cu
);
22307 case DW_TAG_enumeration_type
:
22308 parent_type
= read_type_die (parent
, cu
);
22309 if (TYPE_DECLARED_CLASS (parent_type
))
22311 if (TYPE_TAG_NAME (parent_type
) != NULL
)
22312 return TYPE_TAG_NAME (parent_type
);
22315 /* Fall through. */
22317 return determine_prefix (parent
, cu
);
22321 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
22322 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
22323 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
22324 an obconcat, otherwise allocate storage for the result. The CU argument is
22325 used to determine the language and hence, the appropriate separator. */
22327 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
22330 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
22331 int physname
, struct dwarf2_cu
*cu
)
22333 const char *lead
= "";
22336 if (suffix
== NULL
|| suffix
[0] == '\0'
22337 || prefix
== NULL
|| prefix
[0] == '\0')
22339 else if (cu
->language
== language_d
)
22341 /* For D, the 'main' function could be defined in any module, but it
22342 should never be prefixed. */
22343 if (strcmp (suffix
, "D main") == 0)
22351 else if (cu
->language
== language_fortran
&& physname
)
22353 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
22354 DW_AT_MIPS_linkage_name is preferred and used instead. */
22362 if (prefix
== NULL
)
22364 if (suffix
== NULL
)
22371 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
22373 strcpy (retval
, lead
);
22374 strcat (retval
, prefix
);
22375 strcat (retval
, sep
);
22376 strcat (retval
, suffix
);
22381 /* We have an obstack. */
22382 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
22386 /* Return sibling of die, NULL if no sibling. */
22388 static struct die_info
*
22389 sibling_die (struct die_info
*die
)
22391 return die
->sibling
;
22394 /* Get name of a die, return NULL if not found. */
22396 static const char *
22397 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
22398 struct obstack
*obstack
)
22400 if (name
&& cu
->language
== language_cplus
)
22402 std::string canon_name
= cp_canonicalize_string (name
);
22404 if (!canon_name
.empty ())
22406 if (canon_name
!= name
)
22407 name
= (const char *) obstack_copy0 (obstack
,
22408 canon_name
.c_str (),
22409 canon_name
.length ());
22416 /* Get name of a die, return NULL if not found.
22417 Anonymous namespaces are converted to their magic string. */
22419 static const char *
22420 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22422 struct attribute
*attr
;
22423 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22425 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
22426 if ((!attr
|| !DW_STRING (attr
))
22427 && die
->tag
!= DW_TAG_namespace
22428 && die
->tag
!= DW_TAG_class_type
22429 && die
->tag
!= DW_TAG_interface_type
22430 && die
->tag
!= DW_TAG_structure_type
22431 && die
->tag
!= DW_TAG_union_type
)
22436 case DW_TAG_compile_unit
:
22437 case DW_TAG_partial_unit
:
22438 /* Compilation units have a DW_AT_name that is a filename, not
22439 a source language identifier. */
22440 case DW_TAG_enumeration_type
:
22441 case DW_TAG_enumerator
:
22442 /* These tags always have simple identifiers already; no need
22443 to canonicalize them. */
22444 return DW_STRING (attr
);
22446 case DW_TAG_namespace
:
22447 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
22448 return DW_STRING (attr
);
22449 return CP_ANONYMOUS_NAMESPACE_STR
;
22451 case DW_TAG_class_type
:
22452 case DW_TAG_interface_type
:
22453 case DW_TAG_structure_type
:
22454 case DW_TAG_union_type
:
22455 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
22456 structures or unions. These were of the form "._%d" in GCC 4.1,
22457 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
22458 and GCC 4.4. We work around this problem by ignoring these. */
22459 if (attr
&& DW_STRING (attr
)
22460 && (startswith (DW_STRING (attr
), "._")
22461 || startswith (DW_STRING (attr
), "<anonymous")))
22464 /* GCC might emit a nameless typedef that has a linkage name. See
22465 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22466 if (!attr
|| DW_STRING (attr
) == NULL
)
22468 char *demangled
= NULL
;
22470 attr
= dw2_linkage_name_attr (die
, cu
);
22471 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22474 /* Avoid demangling DW_STRING (attr) the second time on a second
22475 call for the same DIE. */
22476 if (!DW_STRING_IS_CANONICAL (attr
))
22477 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
22483 /* FIXME: we already did this for the partial symbol... */
22486 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22487 demangled
, strlen (demangled
)));
22488 DW_STRING_IS_CANONICAL (attr
) = 1;
22491 /* Strip any leading namespaces/classes, keep only the base name.
22492 DW_AT_name for named DIEs does not contain the prefixes. */
22493 base
= strrchr (DW_STRING (attr
), ':');
22494 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
22497 return DW_STRING (attr
);
22506 if (!DW_STRING_IS_CANONICAL (attr
))
22509 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
22510 &objfile
->per_bfd
->storage_obstack
);
22511 DW_STRING_IS_CANONICAL (attr
) = 1;
22513 return DW_STRING (attr
);
22516 /* Return the die that this die in an extension of, or NULL if there
22517 is none. *EXT_CU is the CU containing DIE on input, and the CU
22518 containing the return value on output. */
22520 static struct die_info
*
22521 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
22523 struct attribute
*attr
;
22525 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
22529 return follow_die_ref (die
, attr
, ext_cu
);
22532 /* Convert a DIE tag into its string name. */
22534 static const char *
22535 dwarf_tag_name (unsigned tag
)
22537 const char *name
= get_DW_TAG_name (tag
);
22540 return "DW_TAG_<unknown>";
22545 /* Convert a DWARF attribute code into its string name. */
22547 static const char *
22548 dwarf_attr_name (unsigned attr
)
22552 #ifdef MIPS /* collides with DW_AT_HP_block_index */
22553 if (attr
== DW_AT_MIPS_fde
)
22554 return "DW_AT_MIPS_fde";
22556 if (attr
== DW_AT_HP_block_index
)
22557 return "DW_AT_HP_block_index";
22560 name
= get_DW_AT_name (attr
);
22563 return "DW_AT_<unknown>";
22568 /* Convert a DWARF value form code into its string name. */
22570 static const char *
22571 dwarf_form_name (unsigned form
)
22573 const char *name
= get_DW_FORM_name (form
);
22576 return "DW_FORM_<unknown>";
22581 static const char *
22582 dwarf_bool_name (unsigned mybool
)
22590 /* Convert a DWARF type code into its string name. */
22592 static const char *
22593 dwarf_type_encoding_name (unsigned enc
)
22595 const char *name
= get_DW_ATE_name (enc
);
22598 return "DW_ATE_<unknown>";
22604 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
22608 print_spaces (indent
, f
);
22609 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
22610 dwarf_tag_name (die
->tag
), die
->abbrev
,
22611 sect_offset_str (die
->sect_off
));
22613 if (die
->parent
!= NULL
)
22615 print_spaces (indent
, f
);
22616 fprintf_unfiltered (f
, " parent at offset: %s\n",
22617 sect_offset_str (die
->parent
->sect_off
));
22620 print_spaces (indent
, f
);
22621 fprintf_unfiltered (f
, " has children: %s\n",
22622 dwarf_bool_name (die
->child
!= NULL
));
22624 print_spaces (indent
, f
);
22625 fprintf_unfiltered (f
, " attributes:\n");
22627 for (i
= 0; i
< die
->num_attrs
; ++i
)
22629 print_spaces (indent
, f
);
22630 fprintf_unfiltered (f
, " %s (%s) ",
22631 dwarf_attr_name (die
->attrs
[i
].name
),
22632 dwarf_form_name (die
->attrs
[i
].form
));
22634 switch (die
->attrs
[i
].form
)
22637 case DW_FORM_GNU_addr_index
:
22638 fprintf_unfiltered (f
, "address: ");
22639 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
22641 case DW_FORM_block2
:
22642 case DW_FORM_block4
:
22643 case DW_FORM_block
:
22644 case DW_FORM_block1
:
22645 fprintf_unfiltered (f
, "block: size %s",
22646 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22648 case DW_FORM_exprloc
:
22649 fprintf_unfiltered (f
, "expression: size %s",
22650 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22652 case DW_FORM_data16
:
22653 fprintf_unfiltered (f
, "constant of 16 bytes");
22655 case DW_FORM_ref_addr
:
22656 fprintf_unfiltered (f
, "ref address: ");
22657 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22659 case DW_FORM_GNU_ref_alt
:
22660 fprintf_unfiltered (f
, "alt ref address: ");
22661 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22667 case DW_FORM_ref_udata
:
22668 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
22669 (long) (DW_UNSND (&die
->attrs
[i
])));
22671 case DW_FORM_data1
:
22672 case DW_FORM_data2
:
22673 case DW_FORM_data4
:
22674 case DW_FORM_data8
:
22675 case DW_FORM_udata
:
22676 case DW_FORM_sdata
:
22677 fprintf_unfiltered (f
, "constant: %s",
22678 pulongest (DW_UNSND (&die
->attrs
[i
])));
22680 case DW_FORM_sec_offset
:
22681 fprintf_unfiltered (f
, "section offset: %s",
22682 pulongest (DW_UNSND (&die
->attrs
[i
])));
22684 case DW_FORM_ref_sig8
:
22685 fprintf_unfiltered (f
, "signature: %s",
22686 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
22688 case DW_FORM_string
:
22690 case DW_FORM_line_strp
:
22691 case DW_FORM_GNU_str_index
:
22692 case DW_FORM_GNU_strp_alt
:
22693 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22694 DW_STRING (&die
->attrs
[i
])
22695 ? DW_STRING (&die
->attrs
[i
]) : "",
22696 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
22699 if (DW_UNSND (&die
->attrs
[i
]))
22700 fprintf_unfiltered (f
, "flag: TRUE");
22702 fprintf_unfiltered (f
, "flag: FALSE");
22704 case DW_FORM_flag_present
:
22705 fprintf_unfiltered (f
, "flag: TRUE");
22707 case DW_FORM_indirect
:
22708 /* The reader will have reduced the indirect form to
22709 the "base form" so this form should not occur. */
22710 fprintf_unfiltered (f
,
22711 "unexpected attribute form: DW_FORM_indirect");
22713 case DW_FORM_implicit_const
:
22714 fprintf_unfiltered (f
, "constant: %s",
22715 plongest (DW_SND (&die
->attrs
[i
])));
22718 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
22719 die
->attrs
[i
].form
);
22722 fprintf_unfiltered (f
, "\n");
22727 dump_die_for_error (struct die_info
*die
)
22729 dump_die_shallow (gdb_stderr
, 0, die
);
22733 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
22735 int indent
= level
* 4;
22737 gdb_assert (die
!= NULL
);
22739 if (level
>= max_level
)
22742 dump_die_shallow (f
, indent
, die
);
22744 if (die
->child
!= NULL
)
22746 print_spaces (indent
, f
);
22747 fprintf_unfiltered (f
, " Children:");
22748 if (level
+ 1 < max_level
)
22750 fprintf_unfiltered (f
, "\n");
22751 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
22755 fprintf_unfiltered (f
,
22756 " [not printed, max nesting level reached]\n");
22760 if (die
->sibling
!= NULL
&& level
> 0)
22762 dump_die_1 (f
, level
, max_level
, die
->sibling
);
22766 /* This is called from the pdie macro in gdbinit.in.
22767 It's not static so gcc will keep a copy callable from gdb. */
22770 dump_die (struct die_info
*die
, int max_level
)
22772 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
22776 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
22780 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
22781 to_underlying (die
->sect_off
),
22787 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
22791 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
22793 if (attr_form_is_ref (attr
))
22794 return (sect_offset
) DW_UNSND (attr
);
22796 complaint (&symfile_complaints
,
22797 _("unsupported die ref attribute form: '%s'"),
22798 dwarf_form_name (attr
->form
));
22802 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
22803 * the value held by the attribute is not constant. */
22806 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
22808 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
22809 return DW_SND (attr
);
22810 else if (attr
->form
== DW_FORM_udata
22811 || attr
->form
== DW_FORM_data1
22812 || attr
->form
== DW_FORM_data2
22813 || attr
->form
== DW_FORM_data4
22814 || attr
->form
== DW_FORM_data8
)
22815 return DW_UNSND (attr
);
22818 /* For DW_FORM_data16 see attr_form_is_constant. */
22819 complaint (&symfile_complaints
,
22820 _("Attribute value is not a constant (%s)"),
22821 dwarf_form_name (attr
->form
));
22822 return default_value
;
22826 /* Follow reference or signature attribute ATTR of SRC_DIE.
22827 On entry *REF_CU is the CU of SRC_DIE.
22828 On exit *REF_CU is the CU of the result. */
22830 static struct die_info
*
22831 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
22832 struct dwarf2_cu
**ref_cu
)
22834 struct die_info
*die
;
22836 if (attr_form_is_ref (attr
))
22837 die
= follow_die_ref (src_die
, attr
, ref_cu
);
22838 else if (attr
->form
== DW_FORM_ref_sig8
)
22839 die
= follow_die_sig (src_die
, attr
, ref_cu
);
22842 dump_die_for_error (src_die
);
22843 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
22844 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
22850 /* Follow reference OFFSET.
22851 On entry *REF_CU is the CU of the source die referencing OFFSET.
22852 On exit *REF_CU is the CU of the result.
22853 Returns NULL if OFFSET is invalid. */
22855 static struct die_info
*
22856 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
22857 struct dwarf2_cu
**ref_cu
)
22859 struct die_info temp_die
;
22860 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
22861 struct dwarf2_per_objfile
*dwarf2_per_objfile
22862 = cu
->per_cu
->dwarf2_per_objfile
;
22864 gdb_assert (cu
->per_cu
!= NULL
);
22868 if (cu
->per_cu
->is_debug_types
)
22870 /* .debug_types CUs cannot reference anything outside their CU.
22871 If they need to, they have to reference a signatured type via
22872 DW_FORM_ref_sig8. */
22873 if (!offset_in_cu_p (&cu
->header
, sect_off
))
22876 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
22877 || !offset_in_cu_p (&cu
->header
, sect_off
))
22879 struct dwarf2_per_cu_data
*per_cu
;
22881 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
22882 dwarf2_per_objfile
);
22884 /* If necessary, add it to the queue and load its DIEs. */
22885 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
22886 load_full_comp_unit (per_cu
, cu
->language
);
22888 target_cu
= per_cu
->cu
;
22890 else if (cu
->dies
== NULL
)
22892 /* We're loading full DIEs during partial symbol reading. */
22893 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
22894 load_full_comp_unit (cu
->per_cu
, language_minimal
);
22897 *ref_cu
= target_cu
;
22898 temp_die
.sect_off
= sect_off
;
22899 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
22901 to_underlying (sect_off
));
22904 /* Follow reference attribute ATTR of SRC_DIE.
22905 On entry *REF_CU is the CU of SRC_DIE.
22906 On exit *REF_CU is the CU of the result. */
22908 static struct die_info
*
22909 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
22910 struct dwarf2_cu
**ref_cu
)
22912 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22913 struct dwarf2_cu
*cu
= *ref_cu
;
22914 struct die_info
*die
;
22916 die
= follow_die_offset (sect_off
,
22917 (attr
->form
== DW_FORM_GNU_ref_alt
22918 || cu
->per_cu
->is_dwz
),
22921 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
22922 "at %s [in module %s]"),
22923 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
22924 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
22929 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
22930 Returned value is intended for DW_OP_call*. Returned
22931 dwarf2_locexpr_baton->data has lifetime of
22932 PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */
22934 struct dwarf2_locexpr_baton
22935 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
22936 struct dwarf2_per_cu_data
*per_cu
,
22937 CORE_ADDR (*get_frame_pc
) (void *baton
),
22940 struct dwarf2_cu
*cu
;
22941 struct die_info
*die
;
22942 struct attribute
*attr
;
22943 struct dwarf2_locexpr_baton retval
;
22944 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
22945 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22947 if (per_cu
->cu
== NULL
)
22952 /* We shouldn't get here for a dummy CU, but don't crash on the user.
22953 Instead just throw an error, not much else we can do. */
22954 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
22955 sect_offset_str (sect_off
), objfile_name (objfile
));
22958 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
22960 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
22961 sect_offset_str (sect_off
), objfile_name (objfile
));
22963 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
22966 /* DWARF: "If there is no such attribute, then there is no effect.".
22967 DATA is ignored if SIZE is 0. */
22969 retval
.data
= NULL
;
22972 else if (attr_form_is_section_offset (attr
))
22974 struct dwarf2_loclist_baton loclist_baton
;
22975 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
22978 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
22980 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
22982 retval
.size
= size
;
22986 if (!attr_form_is_block (attr
))
22987 error (_("Dwarf Error: DIE at %s referenced in module %s "
22988 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
22989 sect_offset_str (sect_off
), objfile_name (objfile
));
22991 retval
.data
= DW_BLOCK (attr
)->data
;
22992 retval
.size
= DW_BLOCK (attr
)->size
;
22994 retval
.per_cu
= cu
->per_cu
;
22996 age_cached_comp_units (dwarf2_per_objfile
);
23001 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
23004 struct dwarf2_locexpr_baton
23005 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
23006 struct dwarf2_per_cu_data
*per_cu
,
23007 CORE_ADDR (*get_frame_pc
) (void *baton
),
23010 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
23012 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
23015 /* Write a constant of a given type as target-ordered bytes into
23018 static const gdb_byte
*
23019 write_constant_as_bytes (struct obstack
*obstack
,
23020 enum bfd_endian byte_order
,
23027 *len
= TYPE_LENGTH (type
);
23028 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23029 store_unsigned_integer (result
, *len
, byte_order
, value
);
23034 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
23035 pointer to the constant bytes and set LEN to the length of the
23036 data. If memory is needed, allocate it on OBSTACK. If the DIE
23037 does not have a DW_AT_const_value, return NULL. */
23040 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
23041 struct dwarf2_per_cu_data
*per_cu
,
23042 struct obstack
*obstack
,
23045 struct dwarf2_cu
*cu
;
23046 struct die_info
*die
;
23047 struct attribute
*attr
;
23048 const gdb_byte
*result
= NULL
;
23051 enum bfd_endian byte_order
;
23052 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
23054 if (per_cu
->cu
== NULL
)
23059 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23060 Instead just throw an error, not much else we can do. */
23061 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23062 sect_offset_str (sect_off
), objfile_name (objfile
));
23065 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23067 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23068 sect_offset_str (sect_off
), objfile_name (objfile
));
23070 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
23074 byte_order
= (bfd_big_endian (objfile
->obfd
)
23075 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
23077 switch (attr
->form
)
23080 case DW_FORM_GNU_addr_index
:
23084 *len
= cu
->header
.addr_size
;
23085 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23086 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
23090 case DW_FORM_string
:
23092 case DW_FORM_GNU_str_index
:
23093 case DW_FORM_GNU_strp_alt
:
23094 /* DW_STRING is already allocated on the objfile obstack, point
23096 result
= (const gdb_byte
*) DW_STRING (attr
);
23097 *len
= strlen (DW_STRING (attr
));
23099 case DW_FORM_block1
:
23100 case DW_FORM_block2
:
23101 case DW_FORM_block4
:
23102 case DW_FORM_block
:
23103 case DW_FORM_exprloc
:
23104 case DW_FORM_data16
:
23105 result
= DW_BLOCK (attr
)->data
;
23106 *len
= DW_BLOCK (attr
)->size
;
23109 /* The DW_AT_const_value attributes are supposed to carry the
23110 symbol's value "represented as it would be on the target
23111 architecture." By the time we get here, it's already been
23112 converted to host endianness, so we just need to sign- or
23113 zero-extend it as appropriate. */
23114 case DW_FORM_data1
:
23115 type
= die_type (die
, cu
);
23116 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
23117 if (result
== NULL
)
23118 result
= write_constant_as_bytes (obstack
, byte_order
,
23121 case DW_FORM_data2
:
23122 type
= die_type (die
, cu
);
23123 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
23124 if (result
== NULL
)
23125 result
= write_constant_as_bytes (obstack
, byte_order
,
23128 case DW_FORM_data4
:
23129 type
= die_type (die
, cu
);
23130 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
23131 if (result
== NULL
)
23132 result
= write_constant_as_bytes (obstack
, byte_order
,
23135 case DW_FORM_data8
:
23136 type
= die_type (die
, cu
);
23137 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
23138 if (result
== NULL
)
23139 result
= write_constant_as_bytes (obstack
, byte_order
,
23143 case DW_FORM_sdata
:
23144 case DW_FORM_implicit_const
:
23145 type
= die_type (die
, cu
);
23146 result
= write_constant_as_bytes (obstack
, byte_order
,
23147 type
, DW_SND (attr
), len
);
23150 case DW_FORM_udata
:
23151 type
= die_type (die
, cu
);
23152 result
= write_constant_as_bytes (obstack
, byte_order
,
23153 type
, DW_UNSND (attr
), len
);
23157 complaint (&symfile_complaints
,
23158 _("unsupported const value attribute form: '%s'"),
23159 dwarf_form_name (attr
->form
));
23166 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
23167 valid type for this die is found. */
23170 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
23171 struct dwarf2_per_cu_data
*per_cu
)
23173 struct dwarf2_cu
*cu
;
23174 struct die_info
*die
;
23176 if (per_cu
->cu
== NULL
)
23182 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23186 return die_type (die
, cu
);
23189 /* Return the type of the DIE at DIE_OFFSET in the CU named by
23193 dwarf2_get_die_type (cu_offset die_offset
,
23194 struct dwarf2_per_cu_data
*per_cu
)
23196 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
23197 return get_die_type_at_offset (die_offset_sect
, per_cu
);
23200 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
23201 On entry *REF_CU is the CU of SRC_DIE.
23202 On exit *REF_CU is the CU of the result.
23203 Returns NULL if the referenced DIE isn't found. */
23205 static struct die_info
*
23206 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
23207 struct dwarf2_cu
**ref_cu
)
23209 struct die_info temp_die
;
23210 struct dwarf2_cu
*sig_cu
;
23211 struct die_info
*die
;
23213 /* While it might be nice to assert sig_type->type == NULL here,
23214 we can get here for DW_AT_imported_declaration where we need
23215 the DIE not the type. */
23217 /* If necessary, add it to the queue and load its DIEs. */
23219 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
23220 read_signatured_type (sig_type
);
23222 sig_cu
= sig_type
->per_cu
.cu
;
23223 gdb_assert (sig_cu
!= NULL
);
23224 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
23225 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
23226 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
23227 to_underlying (temp_die
.sect_off
));
23230 struct dwarf2_per_objfile
*dwarf2_per_objfile
23231 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
23233 /* For .gdb_index version 7 keep track of included TUs.
23234 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
23235 if (dwarf2_per_objfile
->index_table
!= NULL
23236 && dwarf2_per_objfile
->index_table
->version
<= 7)
23238 VEC_safe_push (dwarf2_per_cu_ptr
,
23239 (*ref_cu
)->per_cu
->imported_symtabs
,
23250 /* Follow signatured type referenced by ATTR in SRC_DIE.
23251 On entry *REF_CU is the CU of SRC_DIE.
23252 On exit *REF_CU is the CU of the result.
23253 The result is the DIE of the type.
23254 If the referenced type cannot be found an error is thrown. */
23256 static struct die_info
*
23257 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23258 struct dwarf2_cu
**ref_cu
)
23260 ULONGEST signature
= DW_SIGNATURE (attr
);
23261 struct signatured_type
*sig_type
;
23262 struct die_info
*die
;
23264 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
23266 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
23267 /* sig_type will be NULL if the signatured type is missing from
23269 if (sig_type
== NULL
)
23271 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23272 " from DIE at %s [in module %s]"),
23273 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23274 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23277 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
23280 dump_die_for_error (src_die
);
23281 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23282 " from DIE at %s [in module %s]"),
23283 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23284 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23290 /* Get the type specified by SIGNATURE referenced in DIE/CU,
23291 reading in and processing the type unit if necessary. */
23293 static struct type
*
23294 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
23295 struct dwarf2_cu
*cu
)
23297 struct dwarf2_per_objfile
*dwarf2_per_objfile
23298 = cu
->per_cu
->dwarf2_per_objfile
;
23299 struct signatured_type
*sig_type
;
23300 struct dwarf2_cu
*type_cu
;
23301 struct die_info
*type_die
;
23304 sig_type
= lookup_signatured_type (cu
, signature
);
23305 /* sig_type will be NULL if the signatured type is missing from
23307 if (sig_type
== NULL
)
23309 complaint (&symfile_complaints
,
23310 _("Dwarf Error: Cannot find signatured DIE %s referenced"
23311 " from DIE at %s [in module %s]"),
23312 hex_string (signature
), sect_offset_str (die
->sect_off
),
23313 objfile_name (dwarf2_per_objfile
->objfile
));
23314 return build_error_marker_type (cu
, die
);
23317 /* If we already know the type we're done. */
23318 if (sig_type
->type
!= NULL
)
23319 return sig_type
->type
;
23322 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
23323 if (type_die
!= NULL
)
23325 /* N.B. We need to call get_die_type to ensure only one type for this DIE
23326 is created. This is important, for example, because for c++ classes
23327 we need TYPE_NAME set which is only done by new_symbol. Blech. */
23328 type
= read_type_die (type_die
, type_cu
);
23331 complaint (&symfile_complaints
,
23332 _("Dwarf Error: Cannot build signatured type %s"
23333 " referenced from DIE at %s [in module %s]"),
23334 hex_string (signature
), sect_offset_str (die
->sect_off
),
23335 objfile_name (dwarf2_per_objfile
->objfile
));
23336 type
= build_error_marker_type (cu
, die
);
23341 complaint (&symfile_complaints
,
23342 _("Dwarf Error: Problem reading signatured DIE %s referenced"
23343 " from DIE at %s [in module %s]"),
23344 hex_string (signature
), sect_offset_str (die
->sect_off
),
23345 objfile_name (dwarf2_per_objfile
->objfile
));
23346 type
= build_error_marker_type (cu
, die
);
23348 sig_type
->type
= type
;
23353 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
23354 reading in and processing the type unit if necessary. */
23356 static struct type
*
23357 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
23358 struct dwarf2_cu
*cu
) /* ARI: editCase function */
23360 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
23361 if (attr_form_is_ref (attr
))
23363 struct dwarf2_cu
*type_cu
= cu
;
23364 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
23366 return read_type_die (type_die
, type_cu
);
23368 else if (attr
->form
== DW_FORM_ref_sig8
)
23370 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
23374 struct dwarf2_per_objfile
*dwarf2_per_objfile
23375 = cu
->per_cu
->dwarf2_per_objfile
;
23377 complaint (&symfile_complaints
,
23378 _("Dwarf Error: DW_AT_signature has bad form %s in DIE"
23379 " at %s [in module %s]"),
23380 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
23381 objfile_name (dwarf2_per_objfile
->objfile
));
23382 return build_error_marker_type (cu
, die
);
23386 /* Load the DIEs associated with type unit PER_CU into memory. */
23389 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
23391 struct signatured_type
*sig_type
;
23393 /* Caller is responsible for ensuring type_unit_groups don't get here. */
23394 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
23396 /* We have the per_cu, but we need the signatured_type.
23397 Fortunately this is an easy translation. */
23398 gdb_assert (per_cu
->is_debug_types
);
23399 sig_type
= (struct signatured_type
*) per_cu
;
23401 gdb_assert (per_cu
->cu
== NULL
);
23403 read_signatured_type (sig_type
);
23405 gdb_assert (per_cu
->cu
!= NULL
);
23408 /* die_reader_func for read_signatured_type.
23409 This is identical to load_full_comp_unit_reader,
23410 but is kept separate for now. */
23413 read_signatured_type_reader (const struct die_reader_specs
*reader
,
23414 const gdb_byte
*info_ptr
,
23415 struct die_info
*comp_unit_die
,
23419 struct dwarf2_cu
*cu
= reader
->cu
;
23421 gdb_assert (cu
->die_hash
== NULL
);
23423 htab_create_alloc_ex (cu
->header
.length
/ 12,
23427 &cu
->comp_unit_obstack
,
23428 hashtab_obstack_allocate
,
23429 dummy_obstack_deallocate
);
23432 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
23433 &info_ptr
, comp_unit_die
);
23434 cu
->dies
= comp_unit_die
;
23435 /* comp_unit_die is not stored in die_hash, no need. */
23437 /* We try not to read any attributes in this function, because not
23438 all CUs needed for references have been loaded yet, and symbol
23439 table processing isn't initialized. But we have to set the CU language,
23440 or we won't be able to build types correctly.
23441 Similarly, if we do not read the producer, we can not apply
23442 producer-specific interpretation. */
23443 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
23446 /* Read in a signatured type and build its CU and DIEs.
23447 If the type is a stub for the real type in a DWO file,
23448 read in the real type from the DWO file as well. */
23451 read_signatured_type (struct signatured_type
*sig_type
)
23453 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
23455 gdb_assert (per_cu
->is_debug_types
);
23456 gdb_assert (per_cu
->cu
== NULL
);
23458 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1,
23459 read_signatured_type_reader
, NULL
);
23460 sig_type
->per_cu
.tu_read
= 1;
23463 /* Decode simple location descriptions.
23464 Given a pointer to a dwarf block that defines a location, compute
23465 the location and return the value.
23467 NOTE drow/2003-11-18: This function is called in two situations
23468 now: for the address of static or global variables (partial symbols
23469 only) and for offsets into structures which are expected to be
23470 (more or less) constant. The partial symbol case should go away,
23471 and only the constant case should remain. That will let this
23472 function complain more accurately. A few special modes are allowed
23473 without complaint for global variables (for instance, global
23474 register values and thread-local values).
23476 A location description containing no operations indicates that the
23477 object is optimized out. The return value is 0 for that case.
23478 FIXME drow/2003-11-16: No callers check for this case any more; soon all
23479 callers will only want a very basic result and this can become a
23482 Note that stack[0] is unused except as a default error return. */
23485 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
23487 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
23489 size_t size
= blk
->size
;
23490 const gdb_byte
*data
= blk
->data
;
23491 CORE_ADDR stack
[64];
23493 unsigned int bytes_read
, unsnd
;
23499 stack
[++stacki
] = 0;
23538 stack
[++stacki
] = op
- DW_OP_lit0
;
23573 stack
[++stacki
] = op
- DW_OP_reg0
;
23575 dwarf2_complex_location_expr_complaint ();
23579 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
23581 stack
[++stacki
] = unsnd
;
23583 dwarf2_complex_location_expr_complaint ();
23587 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
23592 case DW_OP_const1u
:
23593 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
23597 case DW_OP_const1s
:
23598 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
23602 case DW_OP_const2u
:
23603 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
23607 case DW_OP_const2s
:
23608 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
23612 case DW_OP_const4u
:
23613 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
23617 case DW_OP_const4s
:
23618 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
23622 case DW_OP_const8u
:
23623 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
23628 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
23634 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
23639 stack
[stacki
+ 1] = stack
[stacki
];
23644 stack
[stacki
- 1] += stack
[stacki
];
23648 case DW_OP_plus_uconst
:
23649 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
23655 stack
[stacki
- 1] -= stack
[stacki
];
23660 /* If we're not the last op, then we definitely can't encode
23661 this using GDB's address_class enum. This is valid for partial
23662 global symbols, although the variable's address will be bogus
23665 dwarf2_complex_location_expr_complaint ();
23668 case DW_OP_GNU_push_tls_address
:
23669 case DW_OP_form_tls_address
:
23670 /* The top of the stack has the offset from the beginning
23671 of the thread control block at which the variable is located. */
23672 /* Nothing should follow this operator, so the top of stack would
23674 /* This is valid for partial global symbols, but the variable's
23675 address will be bogus in the psymtab. Make it always at least
23676 non-zero to not look as a variable garbage collected by linker
23677 which have DW_OP_addr 0. */
23679 dwarf2_complex_location_expr_complaint ();
23683 case DW_OP_GNU_uninit
:
23686 case DW_OP_GNU_addr_index
:
23687 case DW_OP_GNU_const_index
:
23688 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
23695 const char *name
= get_DW_OP_name (op
);
23698 complaint (&symfile_complaints
, _("unsupported stack op: '%s'"),
23701 complaint (&symfile_complaints
, _("unsupported stack op: '%02x'"),
23705 return (stack
[stacki
]);
23708 /* Enforce maximum stack depth of SIZE-1 to avoid writing
23709 outside of the allocated space. Also enforce minimum>0. */
23710 if (stacki
>= ARRAY_SIZE (stack
) - 1)
23712 complaint (&symfile_complaints
,
23713 _("location description stack overflow"));
23719 complaint (&symfile_complaints
,
23720 _("location description stack underflow"));
23724 return (stack
[stacki
]);
23727 /* memory allocation interface */
23729 static struct dwarf_block
*
23730 dwarf_alloc_block (struct dwarf2_cu
*cu
)
23732 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
23735 static struct die_info
*
23736 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
23738 struct die_info
*die
;
23739 size_t size
= sizeof (struct die_info
);
23742 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
23744 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
23745 memset (die
, 0, sizeof (struct die_info
));
23750 /* Macro support. */
23752 /* Return file name relative to the compilation directory of file number I in
23753 *LH's file name table. The result is allocated using xmalloc; the caller is
23754 responsible for freeing it. */
23757 file_file_name (int file
, struct line_header
*lh
)
23759 /* Is the file number a valid index into the line header's file name
23760 table? Remember that file numbers start with one, not zero. */
23761 if (1 <= file
&& file
<= lh
->file_names
.size ())
23763 const file_entry
&fe
= lh
->file_names
[file
- 1];
23765 if (!IS_ABSOLUTE_PATH (fe
.name
))
23767 const char *dir
= fe
.include_dir (lh
);
23769 return concat (dir
, SLASH_STRING
, fe
.name
, (char *) NULL
);
23771 return xstrdup (fe
.name
);
23775 /* The compiler produced a bogus file number. We can at least
23776 record the macro definitions made in the file, even if we
23777 won't be able to find the file by name. */
23778 char fake_name
[80];
23780 xsnprintf (fake_name
, sizeof (fake_name
),
23781 "<bad macro file number %d>", file
);
23783 complaint (&symfile_complaints
,
23784 _("bad file number in macro information (%d)"),
23787 return xstrdup (fake_name
);
23791 /* Return the full name of file number I in *LH's file name table.
23792 Use COMP_DIR as the name of the current directory of the
23793 compilation. The result is allocated using xmalloc; the caller is
23794 responsible for freeing it. */
23796 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
23798 /* Is the file number a valid index into the line header's file name
23799 table? Remember that file numbers start with one, not zero. */
23800 if (1 <= file
&& file
<= lh
->file_names
.size ())
23802 char *relative
= file_file_name (file
, lh
);
23804 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
23806 return reconcat (relative
, comp_dir
, SLASH_STRING
,
23807 relative
, (char *) NULL
);
23810 return file_file_name (file
, lh
);
23814 static struct macro_source_file
*
23815 macro_start_file (int file
, int line
,
23816 struct macro_source_file
*current_file
,
23817 struct line_header
*lh
)
23819 /* File name relative to the compilation directory of this source file. */
23820 char *file_name
= file_file_name (file
, lh
);
23822 if (! current_file
)
23824 /* Note: We don't create a macro table for this compilation unit
23825 at all until we actually get a filename. */
23826 struct macro_table
*macro_table
= get_macro_table ();
23828 /* If we have no current file, then this must be the start_file
23829 directive for the compilation unit's main source file. */
23830 current_file
= macro_set_main (macro_table
, file_name
);
23831 macro_define_special (macro_table
);
23834 current_file
= macro_include (current_file
, line
, file_name
);
23838 return current_file
;
23841 static const char *
23842 consume_improper_spaces (const char *p
, const char *body
)
23846 complaint (&symfile_complaints
,
23847 _("macro definition contains spaces "
23848 "in formal argument list:\n`%s'"),
23860 parse_macro_definition (struct macro_source_file
*file
, int line
,
23865 /* The body string takes one of two forms. For object-like macro
23866 definitions, it should be:
23868 <macro name> " " <definition>
23870 For function-like macro definitions, it should be:
23872 <macro name> "() " <definition>
23874 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
23876 Spaces may appear only where explicitly indicated, and in the
23879 The Dwarf 2 spec says that an object-like macro's name is always
23880 followed by a space, but versions of GCC around March 2002 omit
23881 the space when the macro's definition is the empty string.
23883 The Dwarf 2 spec says that there should be no spaces between the
23884 formal arguments in a function-like macro's formal argument list,
23885 but versions of GCC around March 2002 include spaces after the
23889 /* Find the extent of the macro name. The macro name is terminated
23890 by either a space or null character (for an object-like macro) or
23891 an opening paren (for a function-like macro). */
23892 for (p
= body
; *p
; p
++)
23893 if (*p
== ' ' || *p
== '(')
23896 if (*p
== ' ' || *p
== '\0')
23898 /* It's an object-like macro. */
23899 int name_len
= p
- body
;
23900 char *name
= savestring (body
, name_len
);
23901 const char *replacement
;
23904 replacement
= body
+ name_len
+ 1;
23907 dwarf2_macro_malformed_definition_complaint (body
);
23908 replacement
= body
+ name_len
;
23911 macro_define_object (file
, line
, name
, replacement
);
23915 else if (*p
== '(')
23917 /* It's a function-like macro. */
23918 char *name
= savestring (body
, p
- body
);
23921 char **argv
= XNEWVEC (char *, argv_size
);
23925 p
= consume_improper_spaces (p
, body
);
23927 /* Parse the formal argument list. */
23928 while (*p
&& *p
!= ')')
23930 /* Find the extent of the current argument name. */
23931 const char *arg_start
= p
;
23933 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
23936 if (! *p
|| p
== arg_start
)
23937 dwarf2_macro_malformed_definition_complaint (body
);
23940 /* Make sure argv has room for the new argument. */
23941 if (argc
>= argv_size
)
23944 argv
= XRESIZEVEC (char *, argv
, argv_size
);
23947 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
23950 p
= consume_improper_spaces (p
, body
);
23952 /* Consume the comma, if present. */
23957 p
= consume_improper_spaces (p
, body
);
23966 /* Perfectly formed definition, no complaints. */
23967 macro_define_function (file
, line
, name
,
23968 argc
, (const char **) argv
,
23970 else if (*p
== '\0')
23972 /* Complain, but do define it. */
23973 dwarf2_macro_malformed_definition_complaint (body
);
23974 macro_define_function (file
, line
, name
,
23975 argc
, (const char **) argv
,
23979 /* Just complain. */
23980 dwarf2_macro_malformed_definition_complaint (body
);
23983 /* Just complain. */
23984 dwarf2_macro_malformed_definition_complaint (body
);
23990 for (i
= 0; i
< argc
; i
++)
23996 dwarf2_macro_malformed_definition_complaint (body
);
23999 /* Skip some bytes from BYTES according to the form given in FORM.
24000 Returns the new pointer. */
24002 static const gdb_byte
*
24003 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
24004 enum dwarf_form form
,
24005 unsigned int offset_size
,
24006 struct dwarf2_section_info
*section
)
24008 unsigned int bytes_read
;
24012 case DW_FORM_data1
:
24017 case DW_FORM_data2
:
24021 case DW_FORM_data4
:
24025 case DW_FORM_data8
:
24029 case DW_FORM_data16
:
24033 case DW_FORM_string
:
24034 read_direct_string (abfd
, bytes
, &bytes_read
);
24035 bytes
+= bytes_read
;
24038 case DW_FORM_sec_offset
:
24040 case DW_FORM_GNU_strp_alt
:
24041 bytes
+= offset_size
;
24044 case DW_FORM_block
:
24045 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
24046 bytes
+= bytes_read
;
24049 case DW_FORM_block1
:
24050 bytes
+= 1 + read_1_byte (abfd
, bytes
);
24052 case DW_FORM_block2
:
24053 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
24055 case DW_FORM_block4
:
24056 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
24059 case DW_FORM_sdata
:
24060 case DW_FORM_udata
:
24061 case DW_FORM_GNU_addr_index
:
24062 case DW_FORM_GNU_str_index
:
24063 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
24066 dwarf2_section_buffer_overflow_complaint (section
);
24071 case DW_FORM_implicit_const
:
24076 complaint (&symfile_complaints
,
24077 _("invalid form 0x%x in `%s'"),
24078 form
, get_section_name (section
));
24086 /* A helper for dwarf_decode_macros that handles skipping an unknown
24087 opcode. Returns an updated pointer to the macro data buffer; or,
24088 on error, issues a complaint and returns NULL. */
24090 static const gdb_byte
*
24091 skip_unknown_opcode (unsigned int opcode
,
24092 const gdb_byte
**opcode_definitions
,
24093 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24095 unsigned int offset_size
,
24096 struct dwarf2_section_info
*section
)
24098 unsigned int bytes_read
, i
;
24100 const gdb_byte
*defn
;
24102 if (opcode_definitions
[opcode
] == NULL
)
24104 complaint (&symfile_complaints
,
24105 _("unrecognized DW_MACFINO opcode 0x%x"),
24110 defn
= opcode_definitions
[opcode
];
24111 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
24112 defn
+= bytes_read
;
24114 for (i
= 0; i
< arg
; ++i
)
24116 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
24117 (enum dwarf_form
) defn
[i
], offset_size
,
24119 if (mac_ptr
== NULL
)
24121 /* skip_form_bytes already issued the complaint. */
24129 /* A helper function which parses the header of a macro section.
24130 If the macro section is the extended (for now called "GNU") type,
24131 then this updates *OFFSET_SIZE. Returns a pointer to just after
24132 the header, or issues a complaint and returns NULL on error. */
24134 static const gdb_byte
*
24135 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
24137 const gdb_byte
*mac_ptr
,
24138 unsigned int *offset_size
,
24139 int section_is_gnu
)
24141 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
24143 if (section_is_gnu
)
24145 unsigned int version
, flags
;
24147 version
= read_2_bytes (abfd
, mac_ptr
);
24148 if (version
!= 4 && version
!= 5)
24150 complaint (&symfile_complaints
,
24151 _("unrecognized version `%d' in .debug_macro section"),
24157 flags
= read_1_byte (abfd
, mac_ptr
);
24159 *offset_size
= (flags
& 1) ? 8 : 4;
24161 if ((flags
& 2) != 0)
24162 /* We don't need the line table offset. */
24163 mac_ptr
+= *offset_size
;
24165 /* Vendor opcode descriptions. */
24166 if ((flags
& 4) != 0)
24168 unsigned int i
, count
;
24170 count
= read_1_byte (abfd
, mac_ptr
);
24172 for (i
= 0; i
< count
; ++i
)
24174 unsigned int opcode
, bytes_read
;
24177 opcode
= read_1_byte (abfd
, mac_ptr
);
24179 opcode_definitions
[opcode
] = mac_ptr
;
24180 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24181 mac_ptr
+= bytes_read
;
24190 /* A helper for dwarf_decode_macros that handles the GNU extensions,
24191 including DW_MACRO_import. */
24194 dwarf_decode_macro_bytes (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
24196 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24197 struct macro_source_file
*current_file
,
24198 struct line_header
*lh
,
24199 struct dwarf2_section_info
*section
,
24200 int section_is_gnu
, int section_is_dwz
,
24201 unsigned int offset_size
,
24202 htab_t include_hash
)
24204 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24205 enum dwarf_macro_record_type macinfo_type
;
24206 int at_commandline
;
24207 const gdb_byte
*opcode_definitions
[256];
24209 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24210 &offset_size
, section_is_gnu
);
24211 if (mac_ptr
== NULL
)
24213 /* We already issued a complaint. */
24217 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
24218 GDB is still reading the definitions from command line. First
24219 DW_MACINFO_start_file will need to be ignored as it was already executed
24220 to create CURRENT_FILE for the main source holding also the command line
24221 definitions. On first met DW_MACINFO_start_file this flag is reset to
24222 normally execute all the remaining DW_MACINFO_start_file macinfos. */
24224 at_commandline
= 1;
24228 /* Do we at least have room for a macinfo type byte? */
24229 if (mac_ptr
>= mac_end
)
24231 dwarf2_section_buffer_overflow_complaint (section
);
24235 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24238 /* Note that we rely on the fact that the corresponding GNU and
24239 DWARF constants are the same. */
24241 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24242 switch (macinfo_type
)
24244 /* A zero macinfo type indicates the end of the macro
24249 case DW_MACRO_define
:
24250 case DW_MACRO_undef
:
24251 case DW_MACRO_define_strp
:
24252 case DW_MACRO_undef_strp
:
24253 case DW_MACRO_define_sup
:
24254 case DW_MACRO_undef_sup
:
24256 unsigned int bytes_read
;
24261 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24262 mac_ptr
+= bytes_read
;
24264 if (macinfo_type
== DW_MACRO_define
24265 || macinfo_type
== DW_MACRO_undef
)
24267 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24268 mac_ptr
+= bytes_read
;
24272 LONGEST str_offset
;
24274 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24275 mac_ptr
+= offset_size
;
24277 if (macinfo_type
== DW_MACRO_define_sup
24278 || macinfo_type
== DW_MACRO_undef_sup
24281 struct dwz_file
*dwz
24282 = dwarf2_get_dwz_file (dwarf2_per_objfile
);
24284 body
= read_indirect_string_from_dwz (objfile
,
24288 body
= read_indirect_string_at_offset (dwarf2_per_objfile
,
24292 is_define
= (macinfo_type
== DW_MACRO_define
24293 || macinfo_type
== DW_MACRO_define_strp
24294 || macinfo_type
== DW_MACRO_define_sup
);
24295 if (! current_file
)
24297 /* DWARF violation as no main source is present. */
24298 complaint (&symfile_complaints
,
24299 _("debug info with no main source gives macro %s "
24301 is_define
? _("definition") : _("undefinition"),
24305 if ((line
== 0 && !at_commandline
)
24306 || (line
!= 0 && at_commandline
))
24307 complaint (&symfile_complaints
,
24308 _("debug info gives %s macro %s with %s line %d: %s"),
24309 at_commandline
? _("command-line") : _("in-file"),
24310 is_define
? _("definition") : _("undefinition"),
24311 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
24314 parse_macro_definition (current_file
, line
, body
);
24317 gdb_assert (macinfo_type
== DW_MACRO_undef
24318 || macinfo_type
== DW_MACRO_undef_strp
24319 || macinfo_type
== DW_MACRO_undef_sup
);
24320 macro_undef (current_file
, line
, body
);
24325 case DW_MACRO_start_file
:
24327 unsigned int bytes_read
;
24330 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24331 mac_ptr
+= bytes_read
;
24332 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24333 mac_ptr
+= bytes_read
;
24335 if ((line
== 0 && !at_commandline
)
24336 || (line
!= 0 && at_commandline
))
24337 complaint (&symfile_complaints
,
24338 _("debug info gives source %d included "
24339 "from %s at %s line %d"),
24340 file
, at_commandline
? _("command-line") : _("file"),
24341 line
== 0 ? _("zero") : _("non-zero"), line
);
24343 if (at_commandline
)
24345 /* This DW_MACRO_start_file was executed in the
24347 at_commandline
= 0;
24350 current_file
= macro_start_file (file
, line
, current_file
, lh
);
24354 case DW_MACRO_end_file
:
24355 if (! current_file
)
24356 complaint (&symfile_complaints
,
24357 _("macro debug info has an unmatched "
24358 "`close_file' directive"));
24361 current_file
= current_file
->included_by
;
24362 if (! current_file
)
24364 enum dwarf_macro_record_type next_type
;
24366 /* GCC circa March 2002 doesn't produce the zero
24367 type byte marking the end of the compilation
24368 unit. Complain if it's not there, but exit no
24371 /* Do we at least have room for a macinfo type byte? */
24372 if (mac_ptr
>= mac_end
)
24374 dwarf2_section_buffer_overflow_complaint (section
);
24378 /* We don't increment mac_ptr here, so this is just
24381 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
24383 if (next_type
!= 0)
24384 complaint (&symfile_complaints
,
24385 _("no terminating 0-type entry for "
24386 "macros in `.debug_macinfo' section"));
24393 case DW_MACRO_import
:
24394 case DW_MACRO_import_sup
:
24398 bfd
*include_bfd
= abfd
;
24399 struct dwarf2_section_info
*include_section
= section
;
24400 const gdb_byte
*include_mac_end
= mac_end
;
24401 int is_dwz
= section_is_dwz
;
24402 const gdb_byte
*new_mac_ptr
;
24404 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24405 mac_ptr
+= offset_size
;
24407 if (macinfo_type
== DW_MACRO_import_sup
)
24409 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
24411 dwarf2_read_section (objfile
, &dwz
->macro
);
24413 include_section
= &dwz
->macro
;
24414 include_bfd
= get_section_bfd_owner (include_section
);
24415 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
24419 new_mac_ptr
= include_section
->buffer
+ offset
;
24420 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
24424 /* This has actually happened; see
24425 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
24426 complaint (&symfile_complaints
,
24427 _("recursive DW_MACRO_import in "
24428 ".debug_macro section"));
24432 *slot
= (void *) new_mac_ptr
;
24434 dwarf_decode_macro_bytes (dwarf2_per_objfile
,
24435 include_bfd
, new_mac_ptr
,
24436 include_mac_end
, current_file
, lh
,
24437 section
, section_is_gnu
, is_dwz
,
24438 offset_size
, include_hash
);
24440 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
24445 case DW_MACINFO_vendor_ext
:
24446 if (!section_is_gnu
)
24448 unsigned int bytes_read
;
24450 /* This reads the constant, but since we don't recognize
24451 any vendor extensions, we ignore it. */
24452 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24453 mac_ptr
+= bytes_read
;
24454 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24455 mac_ptr
+= bytes_read
;
24457 /* We don't recognize any vendor extensions. */
24463 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24464 mac_ptr
, mac_end
, abfd
, offset_size
,
24466 if (mac_ptr
== NULL
)
24471 } while (macinfo_type
!= 0);
24475 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
24476 int section_is_gnu
)
24478 struct dwarf2_per_objfile
*dwarf2_per_objfile
24479 = cu
->per_cu
->dwarf2_per_objfile
;
24480 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24481 struct line_header
*lh
= cu
->line_header
;
24483 const gdb_byte
*mac_ptr
, *mac_end
;
24484 struct macro_source_file
*current_file
= 0;
24485 enum dwarf_macro_record_type macinfo_type
;
24486 unsigned int offset_size
= cu
->header
.offset_size
;
24487 const gdb_byte
*opcode_definitions
[256];
24489 struct dwarf2_section_info
*section
;
24490 const char *section_name
;
24492 if (cu
->dwo_unit
!= NULL
)
24494 if (section_is_gnu
)
24496 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
24497 section_name
= ".debug_macro.dwo";
24501 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
24502 section_name
= ".debug_macinfo.dwo";
24507 if (section_is_gnu
)
24509 section
= &dwarf2_per_objfile
->macro
;
24510 section_name
= ".debug_macro";
24514 section
= &dwarf2_per_objfile
->macinfo
;
24515 section_name
= ".debug_macinfo";
24519 dwarf2_read_section (objfile
, section
);
24520 if (section
->buffer
== NULL
)
24522 complaint (&symfile_complaints
, _("missing %s section"), section_name
);
24525 abfd
= get_section_bfd_owner (section
);
24527 /* First pass: Find the name of the base filename.
24528 This filename is needed in order to process all macros whose definition
24529 (or undefinition) comes from the command line. These macros are defined
24530 before the first DW_MACINFO_start_file entry, and yet still need to be
24531 associated to the base file.
24533 To determine the base file name, we scan the macro definitions until we
24534 reach the first DW_MACINFO_start_file entry. We then initialize
24535 CURRENT_FILE accordingly so that any macro definition found before the
24536 first DW_MACINFO_start_file can still be associated to the base file. */
24538 mac_ptr
= section
->buffer
+ offset
;
24539 mac_end
= section
->buffer
+ section
->size
;
24541 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24542 &offset_size
, section_is_gnu
);
24543 if (mac_ptr
== NULL
)
24545 /* We already issued a complaint. */
24551 /* Do we at least have room for a macinfo type byte? */
24552 if (mac_ptr
>= mac_end
)
24554 /* Complaint is printed during the second pass as GDB will probably
24555 stop the first pass earlier upon finding
24556 DW_MACINFO_start_file. */
24560 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24563 /* Note that we rely on the fact that the corresponding GNU and
24564 DWARF constants are the same. */
24566 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24567 switch (macinfo_type
)
24569 /* A zero macinfo type indicates the end of the macro
24574 case DW_MACRO_define
:
24575 case DW_MACRO_undef
:
24576 /* Only skip the data by MAC_PTR. */
24578 unsigned int bytes_read
;
24580 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24581 mac_ptr
+= bytes_read
;
24582 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24583 mac_ptr
+= bytes_read
;
24587 case DW_MACRO_start_file
:
24589 unsigned int bytes_read
;
24592 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24593 mac_ptr
+= bytes_read
;
24594 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24595 mac_ptr
+= bytes_read
;
24597 current_file
= macro_start_file (file
, line
, current_file
, lh
);
24601 case DW_MACRO_end_file
:
24602 /* No data to skip by MAC_PTR. */
24605 case DW_MACRO_define_strp
:
24606 case DW_MACRO_undef_strp
:
24607 case DW_MACRO_define_sup
:
24608 case DW_MACRO_undef_sup
:
24610 unsigned int bytes_read
;
24612 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24613 mac_ptr
+= bytes_read
;
24614 mac_ptr
+= offset_size
;
24618 case DW_MACRO_import
:
24619 case DW_MACRO_import_sup
:
24620 /* Note that, according to the spec, a transparent include
24621 chain cannot call DW_MACRO_start_file. So, we can just
24622 skip this opcode. */
24623 mac_ptr
+= offset_size
;
24626 case DW_MACINFO_vendor_ext
:
24627 /* Only skip the data by MAC_PTR. */
24628 if (!section_is_gnu
)
24630 unsigned int bytes_read
;
24632 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24633 mac_ptr
+= bytes_read
;
24634 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24635 mac_ptr
+= bytes_read
;
24640 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24641 mac_ptr
, mac_end
, abfd
, offset_size
,
24643 if (mac_ptr
== NULL
)
24648 } while (macinfo_type
!= 0 && current_file
== NULL
);
24650 /* Second pass: Process all entries.
24652 Use the AT_COMMAND_LINE flag to determine whether we are still processing
24653 command-line macro definitions/undefinitions. This flag is unset when we
24654 reach the first DW_MACINFO_start_file entry. */
24656 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
24658 NULL
, xcalloc
, xfree
));
24659 mac_ptr
= section
->buffer
+ offset
;
24660 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
24661 *slot
= (void *) mac_ptr
;
24662 dwarf_decode_macro_bytes (dwarf2_per_objfile
,
24663 abfd
, mac_ptr
, mac_end
,
24664 current_file
, lh
, section
,
24665 section_is_gnu
, 0, offset_size
,
24666 include_hash
.get ());
24669 /* Check if the attribute's form is a DW_FORM_block*
24670 if so return true else false. */
24673 attr_form_is_block (const struct attribute
*attr
)
24675 return (attr
== NULL
? 0 :
24676 attr
->form
== DW_FORM_block1
24677 || attr
->form
== DW_FORM_block2
24678 || attr
->form
== DW_FORM_block4
24679 || attr
->form
== DW_FORM_block
24680 || attr
->form
== DW_FORM_exprloc
);
24683 /* Return non-zero if ATTR's value is a section offset --- classes
24684 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
24685 You may use DW_UNSND (attr) to retrieve such offsets.
24687 Section 7.5.4, "Attribute Encodings", explains that no attribute
24688 may have a value that belongs to more than one of these classes; it
24689 would be ambiguous if we did, because we use the same forms for all
24693 attr_form_is_section_offset (const struct attribute
*attr
)
24695 return (attr
->form
== DW_FORM_data4
24696 || attr
->form
== DW_FORM_data8
24697 || attr
->form
== DW_FORM_sec_offset
);
24700 /* Return non-zero if ATTR's value falls in the 'constant' class, or
24701 zero otherwise. When this function returns true, you can apply
24702 dwarf2_get_attr_constant_value to it.
24704 However, note that for some attributes you must check
24705 attr_form_is_section_offset before using this test. DW_FORM_data4
24706 and DW_FORM_data8 are members of both the constant class, and of
24707 the classes that contain offsets into other debug sections
24708 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
24709 that, if an attribute's can be either a constant or one of the
24710 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
24711 taken as section offsets, not constants.
24713 DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
24714 cannot handle that. */
24717 attr_form_is_constant (const struct attribute
*attr
)
24719 switch (attr
->form
)
24721 case DW_FORM_sdata
:
24722 case DW_FORM_udata
:
24723 case DW_FORM_data1
:
24724 case DW_FORM_data2
:
24725 case DW_FORM_data4
:
24726 case DW_FORM_data8
:
24727 case DW_FORM_implicit_const
:
24735 /* DW_ADDR is always stored already as sect_offset; despite for the forms
24736 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
24739 attr_form_is_ref (const struct attribute
*attr
)
24741 switch (attr
->form
)
24743 case DW_FORM_ref_addr
:
24748 case DW_FORM_ref_udata
:
24749 case DW_FORM_GNU_ref_alt
:
24756 /* Return the .debug_loc section to use for CU.
24757 For DWO files use .debug_loc.dwo. */
24759 static struct dwarf2_section_info
*
24760 cu_debug_loc_section (struct dwarf2_cu
*cu
)
24762 struct dwarf2_per_objfile
*dwarf2_per_objfile
24763 = cu
->per_cu
->dwarf2_per_objfile
;
24767 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
24769 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
24771 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
24772 : &dwarf2_per_objfile
->loc
);
24775 /* A helper function that fills in a dwarf2_loclist_baton. */
24778 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
24779 struct dwarf2_loclist_baton
*baton
,
24780 const struct attribute
*attr
)
24782 struct dwarf2_per_objfile
*dwarf2_per_objfile
24783 = cu
->per_cu
->dwarf2_per_objfile
;
24784 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24786 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
24788 baton
->per_cu
= cu
->per_cu
;
24789 gdb_assert (baton
->per_cu
);
24790 /* We don't know how long the location list is, but make sure we
24791 don't run off the edge of the section. */
24792 baton
->size
= section
->size
- DW_UNSND (attr
);
24793 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
24794 baton
->base_address
= cu
->base_address
;
24795 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
24799 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
24800 struct dwarf2_cu
*cu
, int is_block
)
24802 struct dwarf2_per_objfile
*dwarf2_per_objfile
24803 = cu
->per_cu
->dwarf2_per_objfile
;
24804 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24805 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
24807 if (attr_form_is_section_offset (attr
)
24808 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
24809 the section. If so, fall through to the complaint in the
24811 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
24813 struct dwarf2_loclist_baton
*baton
;
24815 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
24817 fill_in_loclist_baton (cu
, baton
, attr
);
24819 if (cu
->base_known
== 0)
24820 complaint (&symfile_complaints
,
24821 _("Location list used without "
24822 "specifying the CU base address."));
24824 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24825 ? dwarf2_loclist_block_index
24826 : dwarf2_loclist_index
);
24827 SYMBOL_LOCATION_BATON (sym
) = baton
;
24831 struct dwarf2_locexpr_baton
*baton
;
24833 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
24834 baton
->per_cu
= cu
->per_cu
;
24835 gdb_assert (baton
->per_cu
);
24837 if (attr_form_is_block (attr
))
24839 /* Note that we're just copying the block's data pointer
24840 here, not the actual data. We're still pointing into the
24841 info_buffer for SYM's objfile; right now we never release
24842 that buffer, but when we do clean up properly this may
24844 baton
->size
= DW_BLOCK (attr
)->size
;
24845 baton
->data
= DW_BLOCK (attr
)->data
;
24849 dwarf2_invalid_attrib_class_complaint ("location description",
24850 SYMBOL_NATURAL_NAME (sym
));
24854 SYMBOL_ACLASS_INDEX (sym
) = (is_block
24855 ? dwarf2_locexpr_block_index
24856 : dwarf2_locexpr_index
);
24857 SYMBOL_LOCATION_BATON (sym
) = baton
;
24861 /* Return the OBJFILE associated with the compilation unit CU. If CU
24862 came from a separate debuginfo file, then the master objfile is
24866 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
24868 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24870 /* Return the master objfile, so that we can report and look up the
24871 correct file containing this variable. */
24872 if (objfile
->separate_debug_objfile_backlink
)
24873 objfile
= objfile
->separate_debug_objfile_backlink
;
24878 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
24879 (CU_HEADERP is unused in such case) or prepare a temporary copy at
24880 CU_HEADERP first. */
24882 static const struct comp_unit_head
*
24883 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
24884 struct dwarf2_per_cu_data
*per_cu
)
24886 const gdb_byte
*info_ptr
;
24889 return &per_cu
->cu
->header
;
24891 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
24893 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
24894 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
24895 rcuh_kind::COMPILE
);
24900 /* Return the address size given in the compilation unit header for CU. */
24903 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24905 struct comp_unit_head cu_header_local
;
24906 const struct comp_unit_head
*cu_headerp
;
24908 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24910 return cu_headerp
->addr_size
;
24913 /* Return the offset size given in the compilation unit header for CU. */
24916 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
24918 struct comp_unit_head cu_header_local
;
24919 const struct comp_unit_head
*cu_headerp
;
24921 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24923 return cu_headerp
->offset_size
;
24926 /* See its dwarf2loc.h declaration. */
24929 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
24931 struct comp_unit_head cu_header_local
;
24932 const struct comp_unit_head
*cu_headerp
;
24934 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
24936 if (cu_headerp
->version
== 2)
24937 return cu_headerp
->addr_size
;
24939 return cu_headerp
->offset_size
;
24942 /* Return the text offset of the CU. The returned offset comes from
24943 this CU's objfile. If this objfile came from a separate debuginfo
24944 file, then the offset may be different from the corresponding
24945 offset in the parent objfile. */
24948 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
24950 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
24952 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
24955 /* Return DWARF version number of PER_CU. */
24958 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
24960 return per_cu
->dwarf_version
;
24963 /* Locate the .debug_info compilation unit from CU's objfile which contains
24964 the DIE at OFFSET. Raises an error on failure. */
24966 static struct dwarf2_per_cu_data
*
24967 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
24968 unsigned int offset_in_dwz
,
24969 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
24971 struct dwarf2_per_cu_data
*this_cu
;
24973 const sect_offset
*cu_off
;
24976 high
= dwarf2_per_objfile
->all_comp_units
.size () - 1;
24979 struct dwarf2_per_cu_data
*mid_cu
;
24980 int mid
= low
+ (high
- low
) / 2;
24982 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
24983 cu_off
= &mid_cu
->sect_off
;
24984 if (mid_cu
->is_dwz
> offset_in_dwz
24985 || (mid_cu
->is_dwz
== offset_in_dwz
&& *cu_off
>= sect_off
))
24990 gdb_assert (low
== high
);
24991 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
24992 cu_off
= &this_cu
->sect_off
;
24993 if (this_cu
->is_dwz
!= offset_in_dwz
|| *cu_off
> sect_off
)
24995 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
24996 error (_("Dwarf Error: could not find partial DIE containing "
24997 "offset %s [in module %s]"),
24998 sect_offset_str (sect_off
),
24999 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
25001 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
25003 return dwarf2_per_objfile
->all_comp_units
[low
-1];
25007 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
25008 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
25009 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
25010 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
25011 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
25016 /* Initialize dwarf2_cu CU, owned by PER_CU. */
25018 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
25019 : per_cu (per_cu_
),
25022 checked_producer (0),
25023 producer_is_gxx_lt_4_6 (0),
25024 producer_is_gcc_lt_4_3 (0),
25025 producer_is_icc_lt_14 (0),
25026 processing_has_namespace_info (0)
25031 /* Destroy a dwarf2_cu. */
25033 dwarf2_cu::~dwarf2_cu ()
25038 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
25041 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
25042 enum language pretend_language
)
25044 struct attribute
*attr
;
25046 /* Set the language we're debugging. */
25047 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
25049 set_cu_language (DW_UNSND (attr
), cu
);
25052 cu
->language
= pretend_language
;
25053 cu
->language_defn
= language_def (cu
->language
);
25056 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
25059 /* Increase the age counter on each cached compilation unit, and free
25060 any that are too old. */
25063 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25065 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25067 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
25068 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25069 while (per_cu
!= NULL
)
25071 per_cu
->cu
->last_used
++;
25072 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
25073 dwarf2_mark (per_cu
->cu
);
25074 per_cu
= per_cu
->cu
->read_in_chain
;
25077 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25078 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25079 while (per_cu
!= NULL
)
25081 struct dwarf2_per_cu_data
*next_cu
;
25083 next_cu
= per_cu
->cu
->read_in_chain
;
25085 if (!per_cu
->cu
->mark
)
25088 *last_chain
= next_cu
;
25091 last_chain
= &per_cu
->cu
->read_in_chain
;
25097 /* Remove a single compilation unit from the cache. */
25100 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
25102 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25103 struct dwarf2_per_objfile
*dwarf2_per_objfile
25104 = target_per_cu
->dwarf2_per_objfile
;
25106 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25107 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25108 while (per_cu
!= NULL
)
25110 struct dwarf2_per_cu_data
*next_cu
;
25112 next_cu
= per_cu
->cu
->read_in_chain
;
25114 if (per_cu
== target_per_cu
)
25118 *last_chain
= next_cu
;
25122 last_chain
= &per_cu
->cu
->read_in_chain
;
25128 /* Release all extra memory associated with OBJFILE. */
25131 dwarf2_free_objfile (struct objfile
*objfile
)
25133 struct dwarf2_per_objfile
*dwarf2_per_objfile
25134 = get_dwarf2_per_objfile (objfile
);
25136 delete dwarf2_per_objfile
;
25139 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
25140 We store these in a hash table separate from the DIEs, and preserve them
25141 when the DIEs are flushed out of cache.
25143 The CU "per_cu" pointer is needed because offset alone is not enough to
25144 uniquely identify the type. A file may have multiple .debug_types sections,
25145 or the type may come from a DWO file. Furthermore, while it's more logical
25146 to use per_cu->section+offset, with Fission the section with the data is in
25147 the DWO file but we don't know that section at the point we need it.
25148 We have to use something in dwarf2_per_cu_data (or the pointer to it)
25149 because we can enter the lookup routine, get_die_type_at_offset, from
25150 outside this file, and thus won't necessarily have PER_CU->cu.
25151 Fortunately, PER_CU is stable for the life of the objfile. */
25153 struct dwarf2_per_cu_offset_and_type
25155 const struct dwarf2_per_cu_data
*per_cu
;
25156 sect_offset sect_off
;
25160 /* Hash function for a dwarf2_per_cu_offset_and_type. */
25163 per_cu_offset_and_type_hash (const void *item
)
25165 const struct dwarf2_per_cu_offset_and_type
*ofs
25166 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
25168 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
25171 /* Equality function for a dwarf2_per_cu_offset_and_type. */
25174 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
25176 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
25177 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
25178 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
25179 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
25181 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
25182 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
25185 /* Set the type associated with DIE to TYPE. Save it in CU's hash
25186 table if necessary. For convenience, return TYPE.
25188 The DIEs reading must have careful ordering to:
25189 * Not cause infite loops trying to read in DIEs as a prerequisite for
25190 reading current DIE.
25191 * Not trying to dereference contents of still incompletely read in types
25192 while reading in other DIEs.
25193 * Enable referencing still incompletely read in types just by a pointer to
25194 the type without accessing its fields.
25196 Therefore caller should follow these rules:
25197 * Try to fetch any prerequisite types we may need to build this DIE type
25198 before building the type and calling set_die_type.
25199 * After building type call set_die_type for current DIE as soon as
25200 possible before fetching more types to complete the current type.
25201 * Make the type as complete as possible before fetching more types. */
25203 static struct type
*
25204 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
25206 struct dwarf2_per_objfile
*dwarf2_per_objfile
25207 = cu
->per_cu
->dwarf2_per_objfile
;
25208 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
25209 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25210 struct attribute
*attr
;
25211 struct dynamic_prop prop
;
25213 /* For Ada types, make sure that the gnat-specific data is always
25214 initialized (if not already set). There are a few types where
25215 we should not be doing so, because the type-specific area is
25216 already used to hold some other piece of info (eg: TYPE_CODE_FLT
25217 where the type-specific area is used to store the floatformat).
25218 But this is not a problem, because the gnat-specific information
25219 is actually not needed for these types. */
25220 if (need_gnat_info (cu
)
25221 && TYPE_CODE (type
) != TYPE_CODE_FUNC
25222 && TYPE_CODE (type
) != TYPE_CODE_FLT
25223 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
25224 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
25225 && TYPE_CODE (type
) != TYPE_CODE_METHOD
25226 && !HAVE_GNAT_AUX_INFO (type
))
25227 INIT_GNAT_SPECIFIC (type
);
25229 /* Read DW_AT_allocated and set in type. */
25230 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
25231 if (attr_form_is_block (attr
))
25233 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25234 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
);
25236 else if (attr
!= NULL
)
25238 complaint (&symfile_complaints
,
25239 _("DW_AT_allocated has the wrong form (%s) at DIE %s"),
25240 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25241 sect_offset_str (die
->sect_off
));
25244 /* Read DW_AT_associated and set in type. */
25245 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
25246 if (attr_form_is_block (attr
))
25248 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25249 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
);
25251 else if (attr
!= NULL
)
25253 complaint (&symfile_complaints
,
25254 _("DW_AT_associated 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_data_location and set in type. */
25260 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
25261 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25262 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
);
25264 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25266 dwarf2_per_objfile
->die_type_hash
=
25267 htab_create_alloc_ex (127,
25268 per_cu_offset_and_type_hash
,
25269 per_cu_offset_and_type_eq
,
25271 &objfile
->objfile_obstack
,
25272 hashtab_obstack_allocate
,
25273 dummy_obstack_deallocate
);
25276 ofs
.per_cu
= cu
->per_cu
;
25277 ofs
.sect_off
= die
->sect_off
;
25279 slot
= (struct dwarf2_per_cu_offset_and_type
**)
25280 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
25282 complaint (&symfile_complaints
,
25283 _("A problem internal to GDB: DIE %s has type already set"),
25284 sect_offset_str (die
->sect_off
));
25285 *slot
= XOBNEW (&objfile
->objfile_obstack
,
25286 struct dwarf2_per_cu_offset_and_type
);
25291 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
25292 or return NULL if the die does not have a saved type. */
25294 static struct type
*
25295 get_die_type_at_offset (sect_offset sect_off
,
25296 struct dwarf2_per_cu_data
*per_cu
)
25298 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
25299 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
25301 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25304 ofs
.per_cu
= per_cu
;
25305 ofs
.sect_off
= sect_off
;
25306 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
25307 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
25314 /* Look up the type for DIE in CU in die_type_hash,
25315 or return NULL if DIE does not have a saved type. */
25317 static struct type
*
25318 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
25320 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
25323 /* Add a dependence relationship from CU to REF_PER_CU. */
25326 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
25327 struct dwarf2_per_cu_data
*ref_per_cu
)
25331 if (cu
->dependencies
== NULL
)
25333 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
25334 NULL
, &cu
->comp_unit_obstack
,
25335 hashtab_obstack_allocate
,
25336 dummy_obstack_deallocate
);
25338 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
25340 *slot
= ref_per_cu
;
25343 /* Subroutine of dwarf2_mark to pass to htab_traverse.
25344 Set the mark field in every compilation unit in the
25345 cache that we must keep because we are keeping CU. */
25348 dwarf2_mark_helper (void **slot
, void *data
)
25350 struct dwarf2_per_cu_data
*per_cu
;
25352 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
25354 /* cu->dependencies references may not yet have been ever read if QUIT aborts
25355 reading of the chain. As such dependencies remain valid it is not much
25356 useful to track and undo them during QUIT cleanups. */
25357 if (per_cu
->cu
== NULL
)
25360 if (per_cu
->cu
->mark
)
25362 per_cu
->cu
->mark
= 1;
25364 if (per_cu
->cu
->dependencies
!= NULL
)
25365 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25370 /* Set the mark field in CU and in every other compilation unit in the
25371 cache that we must keep because we are keeping CU. */
25374 dwarf2_mark (struct dwarf2_cu
*cu
)
25379 if (cu
->dependencies
!= NULL
)
25380 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25384 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
25388 per_cu
->cu
->mark
= 0;
25389 per_cu
= per_cu
->cu
->read_in_chain
;
25393 /* Trivial hash function for partial_die_info: the hash value of a DIE
25394 is its offset in .debug_info for this objfile. */
25397 partial_die_hash (const void *item
)
25399 const struct partial_die_info
*part_die
25400 = (const struct partial_die_info
*) item
;
25402 return to_underlying (part_die
->sect_off
);
25405 /* Trivial comparison function for partial_die_info structures: two DIEs
25406 are equal if they have the same offset. */
25409 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
25411 const struct partial_die_info
*part_die_lhs
25412 = (const struct partial_die_info
*) item_lhs
;
25413 const struct partial_die_info
*part_die_rhs
25414 = (const struct partial_die_info
*) item_rhs
;
25416 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
25419 static struct cmd_list_element
*set_dwarf_cmdlist
;
25420 static struct cmd_list_element
*show_dwarf_cmdlist
;
25423 set_dwarf_cmd (const char *args
, int from_tty
)
25425 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
25430 show_dwarf_cmd (const char *args
, int from_tty
)
25432 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
25435 int dwarf_always_disassemble
;
25438 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
25439 struct cmd_list_element
*c
, const char *value
)
25441 fprintf_filtered (file
,
25442 _("Whether to always disassemble "
25443 "DWARF expressions is %s.\n"),
25448 show_check_physname (struct ui_file
*file
, int from_tty
,
25449 struct cmd_list_element
*c
, const char *value
)
25451 fprintf_filtered (file
,
25452 _("Whether to check \"physname\" is %s.\n"),
25457 _initialize_dwarf2_read (void)
25460 dwarf2_objfile_data_key
= register_objfile_data ();
25462 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
25463 Set DWARF specific variables.\n\
25464 Configure DWARF variables such as the cache size"),
25465 &set_dwarf_cmdlist
, "maintenance set dwarf ",
25466 0/*allow-unknown*/, &maintenance_set_cmdlist
);
25468 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
25469 Show DWARF specific variables\n\
25470 Show DWARF variables such as the cache size"),
25471 &show_dwarf_cmdlist
, "maintenance show dwarf ",
25472 0/*allow-unknown*/, &maintenance_show_cmdlist
);
25474 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
25475 &dwarf_max_cache_age
, _("\
25476 Set the upper bound on the age of cached DWARF compilation units."), _("\
25477 Show the upper bound on the age of cached DWARF compilation units."), _("\
25478 A higher limit means that cached compilation units will be stored\n\
25479 in memory longer, and more total memory will be used. Zero disables\n\
25480 caching, which can slow down startup."),
25482 show_dwarf_max_cache_age
,
25483 &set_dwarf_cmdlist
,
25484 &show_dwarf_cmdlist
);
25486 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
25487 &dwarf_always_disassemble
, _("\
25488 Set whether `info address' always disassembles DWARF expressions."), _("\
25489 Show whether `info address' always disassembles DWARF expressions."), _("\
25490 When enabled, DWARF expressions are always printed in an assembly-like\n\
25491 syntax. When disabled, expressions will be printed in a more\n\
25492 conversational style, when possible."),
25494 show_dwarf_always_disassemble
,
25495 &set_dwarf_cmdlist
,
25496 &show_dwarf_cmdlist
);
25498 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
25499 Set debugging of the DWARF reader."), _("\
25500 Show debugging of the DWARF reader."), _("\
25501 When enabled (non-zero), debugging messages are printed during DWARF\n\
25502 reading and symtab expansion. A value of 1 (one) provides basic\n\
25503 information. A value greater than 1 provides more verbose information."),
25506 &setdebuglist
, &showdebuglist
);
25508 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
25509 Set debugging of the DWARF DIE reader."), _("\
25510 Show debugging of the DWARF DIE reader."), _("\
25511 When enabled (non-zero), DIEs are dumped after they are read in.\n\
25512 The value is the maximum depth to print."),
25515 &setdebuglist
, &showdebuglist
);
25517 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
25518 Set debugging of the dwarf line reader."), _("\
25519 Show debugging of the dwarf line reader."), _("\
25520 When enabled (non-zero), line number entries are dumped as they are read in.\n\
25521 A value of 1 (one) provides basic information.\n\
25522 A value greater than 1 provides more verbose information."),
25525 &setdebuglist
, &showdebuglist
);
25527 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
25528 Set cross-checking of \"physname\" code against demangler."), _("\
25529 Show cross-checking of \"physname\" code against demangler."), _("\
25530 When enabled, GDB's internal \"physname\" code is checked against\n\
25532 NULL
, show_check_physname
,
25533 &setdebuglist
, &showdebuglist
);
25535 add_setshow_boolean_cmd ("use-deprecated-index-sections",
25536 no_class
, &use_deprecated_index_sections
, _("\
25537 Set whether to use deprecated gdb_index sections."), _("\
25538 Show whether to use deprecated gdb_index sections."), _("\
25539 When enabled, deprecated .gdb_index sections are used anyway.\n\
25540 Normally they are ignored either because of a missing feature or\n\
25541 performance issue.\n\
25542 Warning: This option must be enabled before gdb reads the file."),
25545 &setlist
, &showlist
);
25547 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25548 &dwarf2_locexpr_funcs
);
25549 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25550 &dwarf2_loclist_funcs
);
25552 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25553 &dwarf2_block_frame_base_locexpr_funcs
);
25554 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25555 &dwarf2_block_frame_base_loclist_funcs
);
25558 selftests::register_test ("dw2_expand_symtabs_matching",
25559 selftests::dw2_expand_symtabs_matching::run_test
);