1 /* DWARF 2 debugging format support for GDB.
3 Copyright (C) 1994-2019 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-cache.h"
34 #include "dwarf-index-common.h"
43 #include "gdb-demangle.h"
44 #include "expression.h"
45 #include "filenames.h" /* for DOSish file names */
48 #include "complaints.h"
49 #include "dwarf2expr.h"
50 #include "dwarf2loc.h"
51 #include "cp-support.h"
57 #include "typeprint.h"
60 #include "completer.h"
61 #include "common/vec.h"
65 #include "gdbcore.h" /* for gnutarget */
66 #include "gdb/gdb-index.h"
71 #include "common/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>
87 #include "common/selftest.h"
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_key
<dwarf2_per_objfile
> dwarf2_objfile_data_key
;
113 /* The "aclass" indices for various kinds of computed DWARF symbols. */
115 static int dwarf2_locexpr_index
;
116 static int dwarf2_loclist_index
;
117 static int dwarf2_locexpr_block_index
;
118 static int dwarf2_loclist_block_index
;
120 /* An index into a (C++) symbol name component in a symbol name as
121 recorded in the mapped_index's symbol table. For each C++ symbol
122 in the symbol table, we record one entry for the start of each
123 component in the symbol in a table of name components, and then
124 sort the table, in order to be able to binary search symbol names,
125 ignoring leading namespaces, both completion and regular look up.
126 For example, for symbol "A::B::C", we'll have an entry that points
127 to "A::B::C", another that points to "B::C", and another for "C".
128 Note that function symbols in GDB index have no parameter
129 information, just the function/method names. You can convert a
130 name_component to a "const char *" using the
131 'mapped_index::symbol_name_at(offset_type)' method. */
133 struct name_component
135 /* Offset in the symbol name where the component starts. Stored as
136 a (32-bit) offset instead of a pointer to save memory and improve
137 locality on 64-bit architectures. */
138 offset_type name_offset
;
140 /* The symbol's index in the symbol and constant pool tables of a
145 /* Base class containing bits shared by both .gdb_index and
146 .debug_name indexes. */
148 struct mapped_index_base
150 mapped_index_base () = default;
151 DISABLE_COPY_AND_ASSIGN (mapped_index_base
);
153 /* The name_component table (a sorted vector). See name_component's
154 description above. */
155 std::vector
<name_component
> name_components
;
157 /* How NAME_COMPONENTS is sorted. */
158 enum case_sensitivity name_components_casing
;
160 /* Return the number of names in the symbol table. */
161 virtual size_t symbol_name_count () const = 0;
163 /* Get the name of the symbol at IDX in the symbol table. */
164 virtual const char *symbol_name_at (offset_type idx
) const = 0;
166 /* Return whether the name at IDX in the symbol table should be
168 virtual bool symbol_name_slot_invalid (offset_type idx
) const
173 /* Build the symbol name component sorted vector, if we haven't
175 void build_name_components ();
177 /* Returns the lower (inclusive) and upper (exclusive) bounds of the
178 possible matches for LN_NO_PARAMS in the name component
180 std::pair
<std::vector
<name_component
>::const_iterator
,
181 std::vector
<name_component
>::const_iterator
>
182 find_name_components_bounds (const lookup_name_info
&ln_no_params
) const;
184 /* Prevent deleting/destroying via a base class pointer. */
186 ~mapped_index_base() = default;
189 /* A description of the mapped index. The file format is described in
190 a comment by the code that writes the index. */
191 struct mapped_index final
: public mapped_index_base
193 /* A slot/bucket in the symbol table hash. */
194 struct symbol_table_slot
196 const offset_type name
;
197 const offset_type vec
;
200 /* Index data format version. */
203 /* The address table data. */
204 gdb::array_view
<const gdb_byte
> address_table
;
206 /* The symbol table, implemented as a hash table. */
207 gdb::array_view
<symbol_table_slot
> symbol_table
;
209 /* A pointer to the constant pool. */
210 const char *constant_pool
= nullptr;
212 bool symbol_name_slot_invalid (offset_type idx
) const override
214 const auto &bucket
= this->symbol_table
[idx
];
215 return bucket
.name
== 0 && bucket
.vec
;
218 /* Convenience method to get at the name of the symbol at IDX in the
220 const char *symbol_name_at (offset_type idx
) const override
221 { return this->constant_pool
+ MAYBE_SWAP (this->symbol_table
[idx
].name
); }
223 size_t symbol_name_count () const override
224 { return this->symbol_table
.size (); }
227 /* A description of the mapped .debug_names.
228 Uninitialized map has CU_COUNT 0. */
229 struct mapped_debug_names final
: public mapped_index_base
231 mapped_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile_
)
232 : dwarf2_per_objfile (dwarf2_per_objfile_
)
235 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
236 bfd_endian dwarf5_byte_order
;
237 bool dwarf5_is_dwarf64
;
238 bool augmentation_is_gdb
;
240 uint32_t cu_count
= 0;
241 uint32_t tu_count
, bucket_count
, name_count
;
242 const gdb_byte
*cu_table_reordered
, *tu_table_reordered
;
243 const uint32_t *bucket_table_reordered
, *hash_table_reordered
;
244 const gdb_byte
*name_table_string_offs_reordered
;
245 const gdb_byte
*name_table_entry_offs_reordered
;
246 const gdb_byte
*entry_pool
;
253 /* Attribute name DW_IDX_*. */
256 /* Attribute form DW_FORM_*. */
259 /* Value if FORM is DW_FORM_implicit_const. */
260 LONGEST implicit_const
;
262 std::vector
<attr
> attr_vec
;
265 std::unordered_map
<ULONGEST
, index_val
> abbrev_map
;
267 const char *namei_to_name (uint32_t namei
) const;
269 /* Implementation of the mapped_index_base virtual interface, for
270 the name_components cache. */
272 const char *symbol_name_at (offset_type idx
) const override
273 { return namei_to_name (idx
); }
275 size_t symbol_name_count () const override
276 { return this->name_count
; }
279 /* See dwarf2read.h. */
282 get_dwarf2_per_objfile (struct objfile
*objfile
)
284 return dwarf2_objfile_data_key
.get (objfile
);
287 /* Default names of the debugging sections. */
289 /* Note that if the debugging section has been compressed, it might
290 have a name like .zdebug_info. */
292 static const struct dwarf2_debug_sections dwarf2_elf_names
=
294 { ".debug_info", ".zdebug_info" },
295 { ".debug_abbrev", ".zdebug_abbrev" },
296 { ".debug_line", ".zdebug_line" },
297 { ".debug_loc", ".zdebug_loc" },
298 { ".debug_loclists", ".zdebug_loclists" },
299 { ".debug_macinfo", ".zdebug_macinfo" },
300 { ".debug_macro", ".zdebug_macro" },
301 { ".debug_str", ".zdebug_str" },
302 { ".debug_line_str", ".zdebug_line_str" },
303 { ".debug_ranges", ".zdebug_ranges" },
304 { ".debug_rnglists", ".zdebug_rnglists" },
305 { ".debug_types", ".zdebug_types" },
306 { ".debug_addr", ".zdebug_addr" },
307 { ".debug_frame", ".zdebug_frame" },
308 { ".eh_frame", NULL
},
309 { ".gdb_index", ".zgdb_index" },
310 { ".debug_names", ".zdebug_names" },
311 { ".debug_aranges", ".zdebug_aranges" },
315 /* List of DWO/DWP sections. */
317 static const struct dwop_section_names
319 struct dwarf2_section_names abbrev_dwo
;
320 struct dwarf2_section_names info_dwo
;
321 struct dwarf2_section_names line_dwo
;
322 struct dwarf2_section_names loc_dwo
;
323 struct dwarf2_section_names loclists_dwo
;
324 struct dwarf2_section_names macinfo_dwo
;
325 struct dwarf2_section_names macro_dwo
;
326 struct dwarf2_section_names str_dwo
;
327 struct dwarf2_section_names str_offsets_dwo
;
328 struct dwarf2_section_names types_dwo
;
329 struct dwarf2_section_names cu_index
;
330 struct dwarf2_section_names tu_index
;
334 { ".debug_abbrev.dwo", ".zdebug_abbrev.dwo" },
335 { ".debug_info.dwo", ".zdebug_info.dwo" },
336 { ".debug_line.dwo", ".zdebug_line.dwo" },
337 { ".debug_loc.dwo", ".zdebug_loc.dwo" },
338 { ".debug_loclists.dwo", ".zdebug_loclists.dwo" },
339 { ".debug_macinfo.dwo", ".zdebug_macinfo.dwo" },
340 { ".debug_macro.dwo", ".zdebug_macro.dwo" },
341 { ".debug_str.dwo", ".zdebug_str.dwo" },
342 { ".debug_str_offsets.dwo", ".zdebug_str_offsets.dwo" },
343 { ".debug_types.dwo", ".zdebug_types.dwo" },
344 { ".debug_cu_index", ".zdebug_cu_index" },
345 { ".debug_tu_index", ".zdebug_tu_index" },
348 /* local data types */
350 /* The data in a compilation unit header, after target2host
351 translation, looks like this. */
352 struct comp_unit_head
356 unsigned char addr_size
;
357 unsigned char signed_addr_p
;
358 sect_offset abbrev_sect_off
;
360 /* Size of file offsets; either 4 or 8. */
361 unsigned int offset_size
;
363 /* Size of the length field; either 4 or 12. */
364 unsigned int initial_length_size
;
366 enum dwarf_unit_type unit_type
;
368 /* Offset to the first byte of this compilation unit header in the
369 .debug_info section, for resolving relative reference dies. */
370 sect_offset sect_off
;
372 /* Offset to first die in this cu from the start of the cu.
373 This will be the first byte following the compilation unit header. */
374 cu_offset first_die_cu_offset
;
376 /* 64-bit signature of this type unit - it is valid only for
377 UNIT_TYPE DW_UT_type. */
380 /* For types, offset in the type's DIE of the type defined by this TU. */
381 cu_offset type_cu_offset_in_tu
;
384 /* Type used for delaying computation of method physnames.
385 See comments for compute_delayed_physnames. */
386 struct delayed_method_info
388 /* The type to which the method is attached, i.e., its parent class. */
391 /* The index of the method in the type's function fieldlists. */
394 /* The index of the method in the fieldlist. */
397 /* The name of the DIE. */
400 /* The DIE associated with this method. */
401 struct die_info
*die
;
404 /* Internal state when decoding a particular compilation unit. */
407 explicit dwarf2_cu (struct dwarf2_per_cu_data
*per_cu
);
410 DISABLE_COPY_AND_ASSIGN (dwarf2_cu
);
412 /* TU version of handle_DW_AT_stmt_list for read_type_unit_scope.
413 Create the set of symtabs used by this TU, or if this TU is sharing
414 symtabs with another TU and the symtabs have already been created
415 then restore those symtabs in the line header.
416 We don't need the pc/line-number mapping for type units. */
417 void setup_type_unit_groups (struct die_info
*die
);
419 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
420 buildsym_compunit constructor. */
421 struct compunit_symtab
*start_symtab (const char *name
,
422 const char *comp_dir
,
425 /* Reset the builder. */
426 void reset_builder () { m_builder
.reset (); }
428 /* The header of the compilation unit. */
429 struct comp_unit_head header
{};
431 /* Base address of this compilation unit. */
432 CORE_ADDR base_address
= 0;
434 /* Non-zero if base_address has been set. */
437 /* The language we are debugging. */
438 enum language language
= language_unknown
;
439 const struct language_defn
*language_defn
= nullptr;
441 const char *producer
= nullptr;
444 /* The symtab builder for this CU. This is only non-NULL when full
445 symbols are being read. */
446 std::unique_ptr
<buildsym_compunit
> m_builder
;
449 /* The generic symbol table building routines have separate lists for
450 file scope symbols and all all other scopes (local scopes). So
451 we need to select the right one to pass to add_symbol_to_list().
452 We do it by keeping a pointer to the correct list in list_in_scope.
454 FIXME: The original dwarf code just treated the file scope as the
455 first local scope, and all other local scopes as nested local
456 scopes, and worked fine. Check to see if we really need to
457 distinguish these in buildsym.c. */
458 struct pending
**list_in_scope
= nullptr;
460 /* Hash table holding all the loaded partial DIEs
461 with partial_die->offset.SECT_OFF as hash. */
462 htab_t partial_dies
= nullptr;
464 /* Storage for things with the same lifetime as this read-in compilation
465 unit, including partial DIEs. */
466 auto_obstack comp_unit_obstack
;
468 /* When multiple dwarf2_cu structures are living in memory, this field
469 chains them all together, so that they can be released efficiently.
470 We will probably also want a generation counter so that most-recently-used
471 compilation units are cached... */
472 struct dwarf2_per_cu_data
*read_in_chain
= nullptr;
474 /* Backlink to our per_cu entry. */
475 struct dwarf2_per_cu_data
*per_cu
;
477 /* How many compilation units ago was this CU last referenced? */
480 /* A hash table of DIE cu_offset for following references with
481 die_info->offset.sect_off as hash. */
482 htab_t die_hash
= nullptr;
484 /* Full DIEs if read in. */
485 struct die_info
*dies
= nullptr;
487 /* A set of pointers to dwarf2_per_cu_data objects for compilation
488 units referenced by this one. Only set during full symbol processing;
489 partial symbol tables do not have dependencies. */
490 htab_t dependencies
= nullptr;
492 /* Header data from the line table, during full symbol processing. */
493 struct line_header
*line_header
= nullptr;
494 /* Non-NULL if LINE_HEADER is owned by this DWARF_CU. Otherwise,
495 it's owned by dwarf2_per_objfile::line_header_hash. If non-NULL,
496 this is the DW_TAG_compile_unit die for this CU. We'll hold on
497 to the line header as long as this DIE is being processed. See
498 process_die_scope. */
499 die_info
*line_header_die_owner
= nullptr;
501 /* A list of methods which need to have physnames computed
502 after all type information has been read. */
503 std::vector
<delayed_method_info
> method_list
;
505 /* To be copied to symtab->call_site_htab. */
506 htab_t call_site_htab
= nullptr;
508 /* Non-NULL if this CU came from a DWO file.
509 There is an invariant here that is important to remember:
510 Except for attributes copied from the top level DIE in the "main"
511 (or "stub") file in preparation for reading the DWO file
512 (e.g., DW_AT_GNU_addr_base), we KISS: there is only *one* CU.
513 Either there isn't a DWO file (in which case this is NULL and the point
514 is moot), or there is and either we're not going to read it (in which
515 case this is NULL) or there is and we are reading it (in which case this
517 struct dwo_unit
*dwo_unit
= nullptr;
519 /* The DW_AT_addr_base attribute if present, zero otherwise
520 (zero is a valid value though).
521 Note this value comes from the Fission stub CU/TU's DIE. */
522 ULONGEST addr_base
= 0;
524 /* The DW_AT_ranges_base attribute if present, zero otherwise
525 (zero is a valid value though).
526 Note this value comes from the Fission stub CU/TU's DIE.
527 Also note that the value is zero in the non-DWO case so this value can
528 be used without needing to know whether DWO files are in use or not.
529 N.B. This does not apply to DW_AT_ranges appearing in
530 DW_TAG_compile_unit dies. This is a bit of a wart, consider if ever
531 DW_AT_ranges appeared in the DW_TAG_compile_unit of DWO DIEs: then
532 DW_AT_ranges_base *would* have to be applied, and we'd have to care
533 whether the DW_AT_ranges attribute came from the skeleton or DWO. */
534 ULONGEST ranges_base
= 0;
536 /* When reading debug info generated by older versions of rustc, we
537 have to rewrite some union types to be struct types with a
538 variant part. This rewriting must be done after the CU is fully
539 read in, because otherwise at the point of rewriting some struct
540 type might not have been fully processed. So, we keep a list of
541 all such types here and process them after expansion. */
542 std::vector
<struct type
*> rust_unions
;
544 /* Mark used when releasing cached dies. */
547 /* This CU references .debug_loc. See the symtab->locations_valid field.
548 This test is imperfect as there may exist optimized debug code not using
549 any location list and still facing inlining issues if handled as
550 unoptimized code. For a future better test see GCC PR other/32998. */
551 bool has_loclist
: 1;
553 /* These cache the results for producer_is_* fields. CHECKED_PRODUCER is true
554 if all the producer_is_* fields are valid. This information is cached
555 because profiling CU expansion showed excessive time spent in
556 producer_is_gxx_lt_4_6. */
557 bool checked_producer
: 1;
558 bool producer_is_gxx_lt_4_6
: 1;
559 bool producer_is_gcc_lt_4_3
: 1;
560 bool producer_is_icc
: 1;
561 bool producer_is_icc_lt_14
: 1;
562 bool producer_is_codewarrior
: 1;
564 /* When true, the file that we're processing is known to have
565 debugging info for C++ namespaces. GCC 3.3.x did not produce
566 this information, but later versions do. */
568 bool processing_has_namespace_info
: 1;
570 struct partial_die_info
*find_partial_die (sect_offset sect_off
);
572 /* If this CU was inherited by another CU (via specification,
573 abstract_origin, etc), this is the ancestor CU. */
576 /* Get the buildsym_compunit for this CU. */
577 buildsym_compunit
*get_builder ()
579 /* If this CU has a builder associated with it, use that. */
580 if (m_builder
!= nullptr)
581 return m_builder
.get ();
583 /* Otherwise, search ancestors for a valid builder. */
584 if (ancestor
!= nullptr)
585 return ancestor
->get_builder ();
591 /* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
592 This includes type_unit_group and quick_file_names. */
594 struct stmt_list_hash
596 /* The DWO unit this table is from or NULL if there is none. */
597 struct dwo_unit
*dwo_unit
;
599 /* Offset in .debug_line or .debug_line.dwo. */
600 sect_offset line_sect_off
;
603 /* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
604 an object of this type. */
606 struct type_unit_group
608 /* dwarf2read.c's main "handle" on a TU symtab.
609 To simplify things we create an artificial CU that "includes" all the
610 type units using this stmt_list so that the rest of the code still has
611 a "per_cu" handle on the symtab.
612 This PER_CU is recognized by having no section. */
613 #define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->section == NULL)
614 struct dwarf2_per_cu_data per_cu
;
616 /* The TUs that share this DW_AT_stmt_list entry.
617 This is added to while parsing type units to build partial symtabs,
618 and is deleted afterwards and not used again. */
619 VEC (sig_type_ptr
) *tus
;
621 /* The compunit symtab.
622 Type units in a group needn't all be defined in the same source file,
623 so we create an essentially anonymous symtab as the compunit symtab. */
624 struct compunit_symtab
*compunit_symtab
;
626 /* The data used to construct the hash key. */
627 struct stmt_list_hash hash
;
629 /* The number of symtabs from the line header.
630 The value here must match line_header.num_file_names. */
631 unsigned int num_symtabs
;
633 /* The symbol tables for this TU (obtained from the files listed in
635 WARNING: The order of entries here must match the order of entries
636 in the line header. After the first TU using this type_unit_group, the
637 line header for the subsequent TUs is recreated from this. This is done
638 because we need to use the same symtabs for each TU using the same
639 DW_AT_stmt_list value. Also note that symtabs may be repeated here,
640 there's no guarantee the line header doesn't have duplicate entries. */
641 struct symtab
**symtabs
;
644 /* These sections are what may appear in a (real or virtual) DWO file. */
648 struct dwarf2_section_info abbrev
;
649 struct dwarf2_section_info line
;
650 struct dwarf2_section_info loc
;
651 struct dwarf2_section_info loclists
;
652 struct dwarf2_section_info macinfo
;
653 struct dwarf2_section_info macro
;
654 struct dwarf2_section_info str
;
655 struct dwarf2_section_info str_offsets
;
656 /* In the case of a virtual DWO file, these two are unused. */
657 struct dwarf2_section_info info
;
658 VEC (dwarf2_section_info_def
) *types
;
661 /* CUs/TUs in DWP/DWO files. */
665 /* Backlink to the containing struct dwo_file. */
666 struct dwo_file
*dwo_file
;
668 /* The "id" that distinguishes this CU/TU.
669 .debug_info calls this "dwo_id", .debug_types calls this "signature".
670 Since signatures came first, we stick with it for consistency. */
673 /* The section this CU/TU lives in, in the DWO file. */
674 struct dwarf2_section_info
*section
;
676 /* Same as dwarf2_per_cu_data:{sect_off,length} but in the DWO section. */
677 sect_offset sect_off
;
680 /* For types, offset in the type's DIE of the type defined by this TU. */
681 cu_offset type_offset_in_tu
;
684 /* include/dwarf2.h defines the DWP section codes.
685 It defines a max value but it doesn't define a min value, which we
686 use for error checking, so provide one. */
688 enum dwp_v2_section_ids
693 /* Data for one DWO file.
695 This includes virtual DWO files (a virtual DWO file is a DWO file as it
696 appears in a DWP file). DWP files don't really have DWO files per se -
697 comdat folding of types "loses" the DWO file they came from, and from
698 a high level view DWP files appear to contain a mass of random types.
699 However, to maintain consistency with the non-DWP case we pretend DWP
700 files contain virtual DWO files, and we assign each TU with one virtual
701 DWO file (generally based on the line and abbrev section offsets -
702 a heuristic that seems to work in practice). */
706 /* The DW_AT_GNU_dwo_name attribute.
707 For virtual DWO files the name is constructed from the section offsets
708 of abbrev,line,loc,str_offsets so that we combine virtual DWO files
709 from related CU+TUs. */
710 const char *dwo_name
;
712 /* The DW_AT_comp_dir attribute. */
713 const char *comp_dir
;
715 /* The bfd, when the file is open. Otherwise this is NULL.
716 This is unused(NULL) for virtual DWO files where we use dwp_file.dbfd. */
719 /* The sections that make up this DWO file.
720 Remember that for virtual DWO files in DWP V2, these are virtual
721 sections (for lack of a better name). */
722 struct dwo_sections sections
;
724 /* The CUs in the file.
725 Each element is a struct dwo_unit. Multiple CUs per DWO are supported as
726 an extension to handle LLVM's Link Time Optimization output (where
727 multiple source files may be compiled into a single object/dwo pair). */
730 /* Table of TUs in the file.
731 Each element is a struct dwo_unit. */
735 /* These sections are what may appear in a DWP file. */
739 /* These are used by both DWP version 1 and 2. */
740 struct dwarf2_section_info str
;
741 struct dwarf2_section_info cu_index
;
742 struct dwarf2_section_info tu_index
;
744 /* These are only used by DWP version 2 files.
745 In DWP version 1 the .debug_info.dwo, .debug_types.dwo, and other
746 sections are referenced by section number, and are not recorded here.
747 In DWP version 2 there is at most one copy of all these sections, each
748 section being (effectively) comprised of the concatenation of all of the
749 individual sections that exist in the version 1 format.
750 To keep the code simple we treat each of these concatenated pieces as a
751 section itself (a virtual section?). */
752 struct dwarf2_section_info abbrev
;
753 struct dwarf2_section_info info
;
754 struct dwarf2_section_info line
;
755 struct dwarf2_section_info loc
;
756 struct dwarf2_section_info macinfo
;
757 struct dwarf2_section_info macro
;
758 struct dwarf2_section_info str_offsets
;
759 struct dwarf2_section_info types
;
762 /* These sections are what may appear in a virtual DWO file in DWP version 1.
763 A virtual DWO file is a DWO file as it appears in a DWP file. */
765 struct virtual_v1_dwo_sections
767 struct dwarf2_section_info abbrev
;
768 struct dwarf2_section_info line
;
769 struct dwarf2_section_info loc
;
770 struct dwarf2_section_info macinfo
;
771 struct dwarf2_section_info macro
;
772 struct dwarf2_section_info str_offsets
;
773 /* Each DWP hash table entry records one CU or one TU.
774 That is recorded here, and copied to dwo_unit.section. */
775 struct dwarf2_section_info info_or_types
;
778 /* Similar to virtual_v1_dwo_sections, but for DWP version 2.
779 In version 2, the sections of the DWO files are concatenated together
780 and stored in one section of that name. Thus each ELF section contains
781 several "virtual" sections. */
783 struct virtual_v2_dwo_sections
785 bfd_size_type abbrev_offset
;
786 bfd_size_type abbrev_size
;
788 bfd_size_type line_offset
;
789 bfd_size_type line_size
;
791 bfd_size_type loc_offset
;
792 bfd_size_type loc_size
;
794 bfd_size_type macinfo_offset
;
795 bfd_size_type macinfo_size
;
797 bfd_size_type macro_offset
;
798 bfd_size_type macro_size
;
800 bfd_size_type str_offsets_offset
;
801 bfd_size_type str_offsets_size
;
803 /* Each DWP hash table entry records one CU or one TU.
804 That is recorded here, and copied to dwo_unit.section. */
805 bfd_size_type info_or_types_offset
;
806 bfd_size_type info_or_types_size
;
809 /* Contents of DWP hash tables. */
811 struct dwp_hash_table
813 uint32_t version
, nr_columns
;
814 uint32_t nr_units
, nr_slots
;
815 const gdb_byte
*hash_table
, *unit_table
;
820 const gdb_byte
*indices
;
824 /* This is indexed by column number and gives the id of the section
826 #define MAX_NR_V2_DWO_SECTIONS \
827 (1 /* .debug_info or .debug_types */ \
828 + 1 /* .debug_abbrev */ \
829 + 1 /* .debug_line */ \
830 + 1 /* .debug_loc */ \
831 + 1 /* .debug_str_offsets */ \
832 + 1 /* .debug_macro or .debug_macinfo */)
833 int section_ids
[MAX_NR_V2_DWO_SECTIONS
];
834 const gdb_byte
*offsets
;
835 const gdb_byte
*sizes
;
840 /* Data for one DWP file. */
844 dwp_file (const char *name_
, gdb_bfd_ref_ptr
&&abfd
)
846 dbfd (std::move (abfd
))
850 /* Name of the file. */
853 /* File format version. */
857 gdb_bfd_ref_ptr dbfd
;
859 /* Section info for this file. */
860 struct dwp_sections sections
{};
862 /* Table of CUs in the file. */
863 const struct dwp_hash_table
*cus
= nullptr;
865 /* Table of TUs in the file. */
866 const struct dwp_hash_table
*tus
= nullptr;
868 /* Tables of loaded CUs/TUs. Each entry is a struct dwo_unit *. */
869 htab_t loaded_cus
{};
870 htab_t loaded_tus
{};
872 /* Table to map ELF section numbers to their sections.
873 This is only needed for the DWP V1 file format. */
874 unsigned int num_sections
= 0;
875 asection
**elf_sections
= nullptr;
878 /* This represents a '.dwz' file. */
882 dwz_file (gdb_bfd_ref_ptr
&&bfd
)
883 : dwz_bfd (std::move (bfd
))
887 /* A dwz file can only contain a few sections. */
888 struct dwarf2_section_info abbrev
{};
889 struct dwarf2_section_info info
{};
890 struct dwarf2_section_info str
{};
891 struct dwarf2_section_info line
{};
892 struct dwarf2_section_info macro
{};
893 struct dwarf2_section_info gdb_index
{};
894 struct dwarf2_section_info debug_names
{};
897 gdb_bfd_ref_ptr dwz_bfd
;
899 /* If we loaded the index from an external file, this contains the
900 resources associated to the open file, memory mapping, etc. */
901 std::unique_ptr
<index_cache_resource
> index_cache_res
;
904 /* Struct used to pass misc. parameters to read_die_and_children, et
905 al. which are used for both .debug_info and .debug_types dies.
906 All parameters here are unchanging for the life of the call. This
907 struct exists to abstract away the constant parameters of die reading. */
909 struct die_reader_specs
911 /* The bfd of die_section. */
914 /* The CU of the DIE we are parsing. */
915 struct dwarf2_cu
*cu
;
917 /* Non-NULL if reading a DWO file (including one packaged into a DWP). */
918 struct dwo_file
*dwo_file
;
920 /* The section the die comes from.
921 This is either .debug_info or .debug_types, or the .dwo variants. */
922 struct dwarf2_section_info
*die_section
;
924 /* die_section->buffer. */
925 const gdb_byte
*buffer
;
927 /* The end of the buffer. */
928 const gdb_byte
*buffer_end
;
930 /* The value of the DW_AT_comp_dir attribute. */
931 const char *comp_dir
;
933 /* The abbreviation table to use when reading the DIEs. */
934 struct abbrev_table
*abbrev_table
;
937 /* Type of function passed to init_cutu_and_read_dies, et.al. */
938 typedef void (die_reader_func_ftype
) (const struct die_reader_specs
*reader
,
939 const gdb_byte
*info_ptr
,
940 struct die_info
*comp_unit_die
,
944 /* A 1-based directory index. This is a strong typedef to prevent
945 accidentally using a directory index as a 0-based index into an
947 enum class dir_index
: unsigned int {};
949 /* Likewise, a 1-based file name index. */
950 enum class file_name_index
: unsigned int {};
954 file_entry () = default;
956 file_entry (const char *name_
, dir_index d_index_
,
957 unsigned int mod_time_
, unsigned int length_
)
960 mod_time (mod_time_
),
964 /* Return the include directory at D_INDEX stored in LH. Returns
965 NULL if D_INDEX is out of bounds. */
966 const char *include_dir (const line_header
*lh
) const;
968 /* The file name. Note this is an observing pointer. The memory is
969 owned by debug_line_buffer. */
972 /* The directory index (1-based). */
973 dir_index d_index
{};
975 unsigned int mod_time
{};
977 unsigned int length
{};
979 /* True if referenced by the Line Number Program. */
982 /* The associated symbol table, if any. */
983 struct symtab
*symtab
{};
986 /* The line number information for a compilation unit (found in the
987 .debug_line section) begins with a "statement program header",
988 which contains the following information. */
995 /* Add an entry to the include directory table. */
996 void add_include_dir (const char *include_dir
);
998 /* Add an entry to the file name table. */
999 void add_file_name (const char *name
, dir_index d_index
,
1000 unsigned int mod_time
, unsigned int length
);
1002 /* Return the include dir at INDEX (1-based). Returns NULL if INDEX
1003 is out of bounds. */
1004 const char *include_dir_at (dir_index index
) const
1006 /* Convert directory index number (1-based) to vector index
1008 size_t vec_index
= to_underlying (index
) - 1;
1010 if (vec_index
>= include_dirs
.size ())
1012 return include_dirs
[vec_index
];
1015 /* Return the file name at INDEX (1-based). Returns NULL if INDEX
1016 is out of bounds. */
1017 file_entry
*file_name_at (file_name_index index
)
1019 /* Convert file name index number (1-based) to vector index
1021 size_t vec_index
= to_underlying (index
) - 1;
1023 if (vec_index
>= file_names
.size ())
1025 return &file_names
[vec_index
];
1028 /* Offset of line number information in .debug_line section. */
1029 sect_offset sect_off
{};
1031 /* OFFSET is for struct dwz_file associated with dwarf2_per_objfile. */
1032 unsigned offset_in_dwz
: 1; /* Can't initialize bitfields in-class. */
1034 unsigned int total_length
{};
1035 unsigned short version
{};
1036 unsigned int header_length
{};
1037 unsigned char minimum_instruction_length
{};
1038 unsigned char maximum_ops_per_instruction
{};
1039 unsigned char default_is_stmt
{};
1041 unsigned char line_range
{};
1042 unsigned char opcode_base
{};
1044 /* standard_opcode_lengths[i] is the number of operands for the
1045 standard opcode whose value is i. This means that
1046 standard_opcode_lengths[0] is unused, and the last meaningful
1047 element is standard_opcode_lengths[opcode_base - 1]. */
1048 std::unique_ptr
<unsigned char[]> standard_opcode_lengths
;
1050 /* The include_directories table. Note these are observing
1051 pointers. The memory is owned by debug_line_buffer. */
1052 std::vector
<const char *> include_dirs
;
1054 /* The file_names table. */
1055 std::vector
<file_entry
> file_names
;
1057 /* The start and end of the statement program following this
1058 header. These point into dwarf2_per_objfile->line_buffer. */
1059 const gdb_byte
*statement_program_start
{}, *statement_program_end
{};
1062 typedef std::unique_ptr
<line_header
> line_header_up
;
1065 file_entry::include_dir (const line_header
*lh
) const
1067 return lh
->include_dir_at (d_index
);
1070 /* When we construct a partial symbol table entry we only
1071 need this much information. */
1072 struct partial_die_info
: public allocate_on_obstack
1074 partial_die_info (sect_offset sect_off
, struct abbrev_info
*abbrev
);
1076 /* Disable assign but still keep copy ctor, which is needed
1077 load_partial_dies. */
1078 partial_die_info
& operator=(const partial_die_info
& rhs
) = delete;
1080 /* Adjust the partial die before generating a symbol for it. This
1081 function may set the is_external flag or change the DIE's
1083 void fixup (struct dwarf2_cu
*cu
);
1085 /* Read a minimal amount of information into the minimal die
1087 const gdb_byte
*read (const struct die_reader_specs
*reader
,
1088 const struct abbrev_info
&abbrev
,
1089 const gdb_byte
*info_ptr
);
1091 /* Offset of this DIE. */
1092 const sect_offset sect_off
;
1094 /* DWARF-2 tag for this DIE. */
1095 const ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1097 /* Assorted flags describing the data found in this DIE. */
1098 const unsigned int has_children
: 1;
1100 unsigned int is_external
: 1;
1101 unsigned int is_declaration
: 1;
1102 unsigned int has_type
: 1;
1103 unsigned int has_specification
: 1;
1104 unsigned int has_pc_info
: 1;
1105 unsigned int may_be_inlined
: 1;
1107 /* This DIE has been marked DW_AT_main_subprogram. */
1108 unsigned int main_subprogram
: 1;
1110 /* Flag set if the SCOPE field of this structure has been
1112 unsigned int scope_set
: 1;
1114 /* Flag set if the DIE has a byte_size attribute. */
1115 unsigned int has_byte_size
: 1;
1117 /* Flag set if the DIE has a DW_AT_const_value attribute. */
1118 unsigned int has_const_value
: 1;
1120 /* Flag set if any of the DIE's children are template arguments. */
1121 unsigned int has_template_arguments
: 1;
1123 /* Flag set if fixup has been called on this die. */
1124 unsigned int fixup_called
: 1;
1126 /* Flag set if DW_TAG_imported_unit uses DW_FORM_GNU_ref_alt. */
1127 unsigned int is_dwz
: 1;
1129 /* Flag set if spec_offset uses DW_FORM_GNU_ref_alt. */
1130 unsigned int spec_is_dwz
: 1;
1132 /* The name of this DIE. Normally the value of DW_AT_name, but
1133 sometimes a default name for unnamed DIEs. */
1134 const char *name
= nullptr;
1136 /* The linkage name, if present. */
1137 const char *linkage_name
= nullptr;
1139 /* The scope to prepend to our children. This is generally
1140 allocated on the comp_unit_obstack, so will disappear
1141 when this compilation unit leaves the cache. */
1142 const char *scope
= nullptr;
1144 /* Some data associated with the partial DIE. The tag determines
1145 which field is live. */
1148 /* The location description associated with this DIE, if any. */
1149 struct dwarf_block
*locdesc
;
1150 /* The offset of an import, for DW_TAG_imported_unit. */
1151 sect_offset sect_off
;
1154 /* If HAS_PC_INFO, the PC range associated with this DIE. */
1155 CORE_ADDR lowpc
= 0;
1156 CORE_ADDR highpc
= 0;
1158 /* Pointer into the info_buffer (or types_buffer) pointing at the target of
1159 DW_AT_sibling, if any. */
1160 /* NOTE: This member isn't strictly necessary, partial_die_info::read
1161 could return DW_AT_sibling values to its caller load_partial_dies. */
1162 const gdb_byte
*sibling
= nullptr;
1164 /* If HAS_SPECIFICATION, the offset of the DIE referred to by
1165 DW_AT_specification (or DW_AT_abstract_origin or
1166 DW_AT_extension). */
1167 sect_offset spec_offset
{};
1169 /* Pointers to this DIE's parent, first child, and next sibling,
1171 struct partial_die_info
*die_parent
= nullptr;
1172 struct partial_die_info
*die_child
= nullptr;
1173 struct partial_die_info
*die_sibling
= nullptr;
1175 friend struct partial_die_info
*
1176 dwarf2_cu::find_partial_die (sect_offset sect_off
);
1179 /* Only need to do look up in dwarf2_cu::find_partial_die. */
1180 partial_die_info (sect_offset sect_off
)
1181 : partial_die_info (sect_off
, DW_TAG_padding
, 0)
1185 partial_die_info (sect_offset sect_off_
, enum dwarf_tag tag_
,
1187 : sect_off (sect_off_
), tag (tag_
), has_children (has_children_
)
1192 has_specification
= 0;
1195 main_subprogram
= 0;
1198 has_const_value
= 0;
1199 has_template_arguments
= 0;
1206 /* This data structure holds the information of an abbrev. */
1209 unsigned int number
; /* number identifying abbrev */
1210 enum dwarf_tag tag
; /* dwarf tag */
1211 unsigned short has_children
; /* boolean */
1212 unsigned short num_attrs
; /* number of attributes */
1213 struct attr_abbrev
*attrs
; /* an array of attribute descriptions */
1214 struct abbrev_info
*next
; /* next in chain */
1219 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1220 ENUM_BITFIELD(dwarf_form
) form
: 16;
1222 /* It is valid only if FORM is DW_FORM_implicit_const. */
1223 LONGEST implicit_const
;
1226 /* Size of abbrev_table.abbrev_hash_table. */
1227 #define ABBREV_HASH_SIZE 121
1229 /* Top level data structure to contain an abbreviation table. */
1233 explicit abbrev_table (sect_offset off
)
1237 XOBNEWVEC (&abbrev_obstack
, struct abbrev_info
*, ABBREV_HASH_SIZE
);
1238 memset (m_abbrevs
, 0, ABBREV_HASH_SIZE
* sizeof (struct abbrev_info
*));
1241 DISABLE_COPY_AND_ASSIGN (abbrev_table
);
1243 /* Allocate space for a struct abbrev_info object in
1245 struct abbrev_info
*alloc_abbrev ();
1247 /* Add an abbreviation to the table. */
1248 void add_abbrev (unsigned int abbrev_number
, struct abbrev_info
*abbrev
);
1250 /* Look up an abbrev in the table.
1251 Returns NULL if the abbrev is not found. */
1253 struct abbrev_info
*lookup_abbrev (unsigned int abbrev_number
);
1256 /* Where the abbrev table came from.
1257 This is used as a sanity check when the table is used. */
1258 const sect_offset sect_off
;
1260 /* Storage for the abbrev table. */
1261 auto_obstack abbrev_obstack
;
1265 /* Hash table of abbrevs.
1266 This is an array of size ABBREV_HASH_SIZE allocated in abbrev_obstack.
1267 It could be statically allocated, but the previous code didn't so we
1269 struct abbrev_info
**m_abbrevs
;
1272 typedef std::unique_ptr
<struct abbrev_table
> abbrev_table_up
;
1274 /* Attributes have a name and a value. */
1277 ENUM_BITFIELD(dwarf_attribute
) name
: 16;
1278 ENUM_BITFIELD(dwarf_form
) form
: 15;
1280 /* Has DW_STRING already been updated by dwarf2_canonicalize_name? This
1281 field should be in u.str (existing only for DW_STRING) but it is kept
1282 here for better struct attribute alignment. */
1283 unsigned int string_is_canonical
: 1;
1288 struct dwarf_block
*blk
;
1297 /* This data structure holds a complete die structure. */
1300 /* DWARF-2 tag for this DIE. */
1301 ENUM_BITFIELD(dwarf_tag
) tag
: 16;
1303 /* Number of attributes */
1304 unsigned char num_attrs
;
1306 /* True if we're presently building the full type name for the
1307 type derived from this DIE. */
1308 unsigned char building_fullname
: 1;
1310 /* True if this die is in process. PR 16581. */
1311 unsigned char in_process
: 1;
1314 unsigned int abbrev
;
1316 /* Offset in .debug_info or .debug_types section. */
1317 sect_offset sect_off
;
1319 /* The dies in a compilation unit form an n-ary tree. PARENT
1320 points to this die's parent; CHILD points to the first child of
1321 this node; and all the children of a given node are chained
1322 together via their SIBLING fields. */
1323 struct die_info
*child
; /* Its first child, if any. */
1324 struct die_info
*sibling
; /* Its next sibling, if any. */
1325 struct die_info
*parent
; /* Its parent, if any. */
1327 /* An array of attributes, with NUM_ATTRS elements. There may be
1328 zero, but it's not common and zero-sized arrays are not
1329 sufficiently portable C. */
1330 struct attribute attrs
[1];
1333 /* Get at parts of an attribute structure. */
1335 #define DW_STRING(attr) ((attr)->u.str)
1336 #define DW_STRING_IS_CANONICAL(attr) ((attr)->string_is_canonical)
1337 #define DW_UNSND(attr) ((attr)->u.unsnd)
1338 #define DW_BLOCK(attr) ((attr)->u.blk)
1339 #define DW_SND(attr) ((attr)->u.snd)
1340 #define DW_ADDR(attr) ((attr)->u.addr)
1341 #define DW_SIGNATURE(attr) ((attr)->u.signature)
1343 /* Blocks are a bunch of untyped bytes. */
1348 /* Valid only if SIZE is not zero. */
1349 const gdb_byte
*data
;
1352 #ifndef ATTR_ALLOC_CHUNK
1353 #define ATTR_ALLOC_CHUNK 4
1356 /* Allocate fields for structs, unions and enums in this size. */
1357 #ifndef DW_FIELD_ALLOC_CHUNK
1358 #define DW_FIELD_ALLOC_CHUNK 4
1361 /* FIXME: We might want to set this from BFD via bfd_arch_bits_per_byte,
1362 but this would require a corresponding change in unpack_field_as_long
1364 static int bits_per_byte
= 8;
1366 /* When reading a variant or variant part, we track a bit more
1367 information about the field, and store it in an object of this
1370 struct variant_field
1372 /* If we see a DW_TAG_variant, then this will be the discriminant
1374 ULONGEST discriminant_value
;
1375 /* If we see a DW_TAG_variant, then this will be set if this is the
1377 bool default_branch
;
1378 /* While reading a DW_TAG_variant_part, this will be set if this
1379 field is the discriminant. */
1380 bool is_discriminant
;
1385 int accessibility
= 0;
1387 /* Extra information to describe a variant or variant part. */
1388 struct variant_field variant
{};
1389 struct field field
{};
1394 const char *name
= nullptr;
1395 std::vector
<struct fn_field
> fnfields
;
1398 /* The routines that read and process dies for a C struct or C++ class
1399 pass lists of data member fields and lists of member function fields
1400 in an instance of a field_info structure, as defined below. */
1403 /* List of data member and baseclasses fields. */
1404 std::vector
<struct nextfield
> fields
;
1405 std::vector
<struct nextfield
> baseclasses
;
1407 /* Number of fields (including baseclasses). */
1410 /* Set if the accesibility of one of the fields is not public. */
1411 int non_public_fields
= 0;
1413 /* Member function fieldlist array, contains name of possibly overloaded
1414 member function, number of overloaded member functions and a pointer
1415 to the head of the member function field chain. */
1416 std::vector
<struct fnfieldlist
> fnfieldlists
;
1418 /* typedefs defined inside this class. TYPEDEF_FIELD_LIST contains head of
1419 a NULL terminated list of TYPEDEF_FIELD_LIST_COUNT elements. */
1420 std::vector
<struct decl_field
> typedef_field_list
;
1422 /* Nested types defined by this class and the number of elements in this
1424 std::vector
<struct decl_field
> nested_types_list
;
1427 /* One item on the queue of compilation units to read in full symbols
1429 struct dwarf2_queue_item
1431 struct dwarf2_per_cu_data
*per_cu
;
1432 enum language pretend_language
;
1433 struct dwarf2_queue_item
*next
;
1436 /* The current queue. */
1437 static struct dwarf2_queue_item
*dwarf2_queue
, *dwarf2_queue_tail
;
1439 /* Loaded secondary compilation units are kept in memory until they
1440 have not been referenced for the processing of this many
1441 compilation units. Set this to zero to disable caching. Cache
1442 sizes of up to at least twenty will improve startup time for
1443 typical inter-CU-reference binaries, at an obvious memory cost. */
1444 static int dwarf_max_cache_age
= 5;
1446 show_dwarf_max_cache_age (struct ui_file
*file
, int from_tty
,
1447 struct cmd_list_element
*c
, const char *value
)
1449 fprintf_filtered (file
, _("The upper bound on the age of cached "
1450 "DWARF compilation units is %s.\n"),
1454 /* local function prototypes */
1456 static const char *get_section_name (const struct dwarf2_section_info
*);
1458 static const char *get_section_file_name (const struct dwarf2_section_info
*);
1460 static void dwarf2_find_base_address (struct die_info
*die
,
1461 struct dwarf2_cu
*cu
);
1463 static struct partial_symtab
*create_partial_symtab
1464 (struct dwarf2_per_cu_data
*per_cu
, const char *name
);
1466 static void build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
1467 const gdb_byte
*info_ptr
,
1468 struct die_info
*type_unit_die
,
1469 int has_children
, void *data
);
1471 static void dwarf2_build_psymtabs_hard
1472 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1474 static void scan_partial_symbols (struct partial_die_info
*,
1475 CORE_ADDR
*, CORE_ADDR
*,
1476 int, struct dwarf2_cu
*);
1478 static void add_partial_symbol (struct partial_die_info
*,
1479 struct dwarf2_cu
*);
1481 static void add_partial_namespace (struct partial_die_info
*pdi
,
1482 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1483 int set_addrmap
, struct dwarf2_cu
*cu
);
1485 static void add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
1486 CORE_ADDR
*highpc
, int set_addrmap
,
1487 struct dwarf2_cu
*cu
);
1489 static void add_partial_enumeration (struct partial_die_info
*enum_pdi
,
1490 struct dwarf2_cu
*cu
);
1492 static void add_partial_subprogram (struct partial_die_info
*pdi
,
1493 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
1494 int need_pc
, struct dwarf2_cu
*cu
);
1496 static void dwarf2_read_symtab (struct partial_symtab
*,
1499 static void psymtab_to_symtab_1 (struct partial_symtab
*);
1501 static abbrev_table_up abbrev_table_read_table
1502 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, struct dwarf2_section_info
*,
1505 static unsigned int peek_abbrev_code (bfd
*, const gdb_byte
*);
1507 static struct partial_die_info
*load_partial_dies
1508 (const struct die_reader_specs
*, const gdb_byte
*, int);
1510 /* A pair of partial_die_info and compilation unit. */
1511 struct cu_partial_die_info
1513 /* The compilation unit of the partial_die_info. */
1514 struct dwarf2_cu
*cu
;
1515 /* A partial_die_info. */
1516 struct partial_die_info
*pdi
;
1518 cu_partial_die_info (struct dwarf2_cu
*cu
, struct partial_die_info
*pdi
)
1524 cu_partial_die_info () = delete;
1527 static const struct cu_partial_die_info
find_partial_die (sect_offset
, int,
1528 struct dwarf2_cu
*);
1530 static const gdb_byte
*read_attribute (const struct die_reader_specs
*,
1531 struct attribute
*, struct attr_abbrev
*,
1534 static unsigned int read_1_byte (bfd
*, const gdb_byte
*);
1536 static int read_1_signed_byte (bfd
*, const gdb_byte
*);
1538 static unsigned int read_2_bytes (bfd
*, const gdb_byte
*);
1540 /* Read the next three bytes (little-endian order) as an unsigned integer. */
1541 static unsigned int read_3_bytes (bfd
*, const gdb_byte
*);
1543 static unsigned int read_4_bytes (bfd
*, const gdb_byte
*);
1545 static ULONGEST
read_8_bytes (bfd
*, const gdb_byte
*);
1547 static CORE_ADDR
read_address (bfd
*, const gdb_byte
*ptr
, struct dwarf2_cu
*,
1550 static LONGEST
read_initial_length (bfd
*, const gdb_byte
*, unsigned int *);
1552 static LONGEST read_checked_initial_length_and_offset
1553 (bfd
*, const gdb_byte
*, const struct comp_unit_head
*,
1554 unsigned int *, unsigned int *);
1556 static LONGEST
read_offset (bfd
*, const gdb_byte
*,
1557 const struct comp_unit_head
*,
1560 static LONGEST
read_offset_1 (bfd
*, const gdb_byte
*, unsigned int);
1562 static sect_offset read_abbrev_offset
1563 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
1564 struct dwarf2_section_info
*, sect_offset
);
1566 static const gdb_byte
*read_n_bytes (bfd
*, const gdb_byte
*, unsigned int);
1568 static const char *read_direct_string (bfd
*, const gdb_byte
*, unsigned int *);
1570 static const char *read_indirect_string
1571 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1572 const struct comp_unit_head
*, unsigned int *);
1574 static const char *read_indirect_line_string
1575 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*, const gdb_byte
*,
1576 const struct comp_unit_head
*, unsigned int *);
1578 static const char *read_indirect_string_at_offset
1579 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
1580 LONGEST str_offset
);
1582 static const char *read_indirect_string_from_dwz
1583 (struct objfile
*objfile
, struct dwz_file
*, LONGEST
);
1585 static LONGEST
read_signed_leb128 (bfd
*, const gdb_byte
*, unsigned int *);
1587 static CORE_ADDR
read_addr_index_from_leb128 (struct dwarf2_cu
*,
1591 static const char *read_str_index (const struct die_reader_specs
*reader
,
1592 ULONGEST str_index
);
1594 static void set_cu_language (unsigned int, struct dwarf2_cu
*);
1596 static struct attribute
*dwarf2_attr (struct die_info
*, unsigned int,
1597 struct dwarf2_cu
*);
1599 static struct attribute
*dwarf2_attr_no_follow (struct die_info
*,
1602 static const char *dwarf2_string_attr (struct die_info
*die
, unsigned int name
,
1603 struct dwarf2_cu
*cu
);
1605 static int dwarf2_flag_true_p (struct die_info
*die
, unsigned name
,
1606 struct dwarf2_cu
*cu
);
1608 static int die_is_declaration (struct die_info
*, struct dwarf2_cu
*cu
);
1610 static struct die_info
*die_specification (struct die_info
*die
,
1611 struct dwarf2_cu
**);
1613 static line_header_up
dwarf_decode_line_header (sect_offset sect_off
,
1614 struct dwarf2_cu
*cu
);
1616 static void dwarf_decode_lines (struct line_header
*, const char *,
1617 struct dwarf2_cu
*, struct partial_symtab
*,
1618 CORE_ADDR
, int decode_mapping
);
1620 static void dwarf2_start_subfile (struct dwarf2_cu
*, const char *,
1623 static struct symbol
*new_symbol (struct die_info
*, struct type
*,
1624 struct dwarf2_cu
*, struct symbol
* = NULL
);
1626 static void dwarf2_const_value (const struct attribute
*, struct symbol
*,
1627 struct dwarf2_cu
*);
1629 static void dwarf2_const_value_attr (const struct attribute
*attr
,
1632 struct obstack
*obstack
,
1633 struct dwarf2_cu
*cu
, LONGEST
*value
,
1634 const gdb_byte
**bytes
,
1635 struct dwarf2_locexpr_baton
**baton
);
1637 static struct type
*die_type (struct die_info
*, struct dwarf2_cu
*);
1639 static int need_gnat_info (struct dwarf2_cu
*);
1641 static struct type
*die_descriptive_type (struct die_info
*,
1642 struct dwarf2_cu
*);
1644 static void set_descriptive_type (struct type
*, struct die_info
*,
1645 struct dwarf2_cu
*);
1647 static struct type
*die_containing_type (struct die_info
*,
1648 struct dwarf2_cu
*);
1650 static struct type
*lookup_die_type (struct die_info
*, const struct attribute
*,
1651 struct dwarf2_cu
*);
1653 static struct type
*read_type_die (struct die_info
*, struct dwarf2_cu
*);
1655 static struct type
*read_type_die_1 (struct die_info
*, struct dwarf2_cu
*);
1657 static const char *determine_prefix (struct die_info
*die
, struct dwarf2_cu
*);
1659 static char *typename_concat (struct obstack
*obs
, const char *prefix
,
1660 const char *suffix
, int physname
,
1661 struct dwarf2_cu
*cu
);
1663 static void read_file_scope (struct die_info
*, struct dwarf2_cu
*);
1665 static void read_type_unit_scope (struct die_info
*, struct dwarf2_cu
*);
1667 static void read_func_scope (struct die_info
*, struct dwarf2_cu
*);
1669 static void read_lexical_block_scope (struct die_info
*, struct dwarf2_cu
*);
1671 static void read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
);
1673 static void read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
);
1675 static int dwarf2_ranges_read (unsigned, CORE_ADDR
*, CORE_ADDR
*,
1676 struct dwarf2_cu
*, struct partial_symtab
*);
1678 /* How dwarf2_get_pc_bounds constructed its *LOWPC and *HIGHPC return
1679 values. Keep the items ordered with increasing constraints compliance. */
1682 /* No attribute DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges was found. */
1683 PC_BOUNDS_NOT_PRESENT
,
1685 /* Some of the attributes DW_AT_low_pc, DW_AT_high_pc or DW_AT_ranges
1686 were present but they do not form a valid range of PC addresses. */
1689 /* Discontiguous range was found - that is DW_AT_ranges was found. */
1692 /* Contiguous range was found - DW_AT_low_pc and DW_AT_high_pc were found. */
1696 static enum pc_bounds_kind
dwarf2_get_pc_bounds (struct die_info
*,
1697 CORE_ADDR
*, CORE_ADDR
*,
1699 struct partial_symtab
*);
1701 static void get_scope_pc_bounds (struct die_info
*,
1702 CORE_ADDR
*, CORE_ADDR
*,
1703 struct dwarf2_cu
*);
1705 static void dwarf2_record_block_ranges (struct die_info
*, struct block
*,
1706 CORE_ADDR
, struct dwarf2_cu
*);
1708 static void dwarf2_add_field (struct field_info
*, struct die_info
*,
1709 struct dwarf2_cu
*);
1711 static void dwarf2_attach_fields_to_type (struct field_info
*,
1712 struct type
*, struct dwarf2_cu
*);
1714 static void dwarf2_add_member_fn (struct field_info
*,
1715 struct die_info
*, struct type
*,
1716 struct dwarf2_cu
*);
1718 static void dwarf2_attach_fn_fields_to_type (struct field_info
*,
1720 struct dwarf2_cu
*);
1722 static void process_structure_scope (struct die_info
*, struct dwarf2_cu
*);
1724 static void read_common_block (struct die_info
*, struct dwarf2_cu
*);
1726 static void read_namespace (struct die_info
*die
, struct dwarf2_cu
*);
1728 static void read_module (struct die_info
*die
, struct dwarf2_cu
*cu
);
1730 static struct using_direct
**using_directives (struct dwarf2_cu
*cu
);
1732 static void read_import_statement (struct die_info
*die
, struct dwarf2_cu
*);
1734 static int read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
);
1736 static struct type
*read_module_type (struct die_info
*die
,
1737 struct dwarf2_cu
*cu
);
1739 static const char *namespace_name (struct die_info
*die
,
1740 int *is_anonymous
, struct dwarf2_cu
*);
1742 static void process_enumeration_scope (struct die_info
*, struct dwarf2_cu
*);
1744 static CORE_ADDR
decode_locdesc (struct dwarf_block
*, struct dwarf2_cu
*);
1746 static enum dwarf_array_dim_ordering
read_array_order (struct die_info
*,
1747 struct dwarf2_cu
*);
1749 static struct die_info
*read_die_and_siblings_1
1750 (const struct die_reader_specs
*, const gdb_byte
*, const gdb_byte
**,
1753 static struct die_info
*read_die_and_siblings (const struct die_reader_specs
*,
1754 const gdb_byte
*info_ptr
,
1755 const gdb_byte
**new_info_ptr
,
1756 struct die_info
*parent
);
1758 static const gdb_byte
*read_full_die_1 (const struct die_reader_specs
*,
1759 struct die_info
**, const gdb_byte
*,
1762 static const gdb_byte
*read_full_die (const struct die_reader_specs
*,
1763 struct die_info
**, const gdb_byte
*,
1766 static void process_die (struct die_info
*, struct dwarf2_cu
*);
1768 static const char *dwarf2_canonicalize_name (const char *, struct dwarf2_cu
*,
1771 static const char *dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*);
1773 static const char *dwarf2_full_name (const char *name
,
1774 struct die_info
*die
,
1775 struct dwarf2_cu
*cu
);
1777 static const char *dwarf2_physname (const char *name
, struct die_info
*die
,
1778 struct dwarf2_cu
*cu
);
1780 static struct die_info
*dwarf2_extension (struct die_info
*die
,
1781 struct dwarf2_cu
**);
1783 static const char *dwarf_tag_name (unsigned int);
1785 static const char *dwarf_attr_name (unsigned int);
1787 static const char *dwarf_form_name (unsigned int);
1789 static const char *dwarf_bool_name (unsigned int);
1791 static const char *dwarf_type_encoding_name (unsigned int);
1793 static struct die_info
*sibling_die (struct die_info
*);
1795 static void dump_die_shallow (struct ui_file
*, int indent
, struct die_info
*);
1797 static void dump_die_for_error (struct die_info
*);
1799 static void dump_die_1 (struct ui_file
*, int level
, int max_level
,
1802 /*static*/ void dump_die (struct die_info
*, int max_level
);
1804 static void store_in_ref_table (struct die_info
*,
1805 struct dwarf2_cu
*);
1807 static sect_offset
dwarf2_get_ref_die_offset (const struct attribute
*);
1809 static LONGEST
dwarf2_get_attr_constant_value (const struct attribute
*, int);
1811 static struct die_info
*follow_die_ref_or_sig (struct die_info
*,
1812 const struct attribute
*,
1813 struct dwarf2_cu
**);
1815 static struct die_info
*follow_die_ref (struct die_info
*,
1816 const struct attribute
*,
1817 struct dwarf2_cu
**);
1819 static struct die_info
*follow_die_sig (struct die_info
*,
1820 const struct attribute
*,
1821 struct dwarf2_cu
**);
1823 static struct type
*get_signatured_type (struct die_info
*, ULONGEST
,
1824 struct dwarf2_cu
*);
1826 static struct type
*get_DW_AT_signature_type (struct die_info
*,
1827 const struct attribute
*,
1828 struct dwarf2_cu
*);
1830 static void load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
);
1832 static void read_signatured_type (struct signatured_type
*);
1834 static int attr_to_dynamic_prop (const struct attribute
*attr
,
1835 struct die_info
*die
, struct dwarf2_cu
*cu
,
1836 struct dynamic_prop
*prop
);
1838 /* memory allocation interface */
1840 static struct dwarf_block
*dwarf_alloc_block (struct dwarf2_cu
*);
1842 static struct die_info
*dwarf_alloc_die (struct dwarf2_cu
*, int);
1844 static void dwarf_decode_macros (struct dwarf2_cu
*, unsigned int, int);
1846 static int attr_form_is_block (const struct attribute
*);
1848 static int attr_form_is_section_offset (const struct attribute
*);
1850 static int attr_form_is_constant (const struct attribute
*);
1852 static int attr_form_is_ref (const struct attribute
*);
1854 static void fill_in_loclist_baton (struct dwarf2_cu
*cu
,
1855 struct dwarf2_loclist_baton
*baton
,
1856 const struct attribute
*attr
);
1858 static void dwarf2_symbol_mark_computed (const struct attribute
*attr
,
1860 struct dwarf2_cu
*cu
,
1863 static const gdb_byte
*skip_one_die (const struct die_reader_specs
*reader
,
1864 const gdb_byte
*info_ptr
,
1865 struct abbrev_info
*abbrev
);
1867 static hashval_t
partial_die_hash (const void *item
);
1869 static int partial_die_eq (const void *item_lhs
, const void *item_rhs
);
1871 static struct dwarf2_per_cu_data
*dwarf2_find_containing_comp_unit
1872 (sect_offset sect_off
, unsigned int offset_in_dwz
,
1873 struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1875 static void prepare_one_comp_unit (struct dwarf2_cu
*cu
,
1876 struct die_info
*comp_unit_die
,
1877 enum language pretend_language
);
1879 static void age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1881 static void free_one_cached_comp_unit (struct dwarf2_per_cu_data
*);
1883 static struct type
*set_die_type (struct die_info
*, struct type
*,
1884 struct dwarf2_cu
*);
1886 static void create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1888 static int create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1890 static void load_full_comp_unit (struct dwarf2_per_cu_data
*, bool,
1893 static void process_full_comp_unit (struct dwarf2_per_cu_data
*,
1896 static void process_full_type_unit (struct dwarf2_per_cu_data
*,
1899 static void dwarf2_add_dependence (struct dwarf2_cu
*,
1900 struct dwarf2_per_cu_data
*);
1902 static void dwarf2_mark (struct dwarf2_cu
*);
1904 static void dwarf2_clear_marks (struct dwarf2_per_cu_data
*);
1906 static struct type
*get_die_type_at_offset (sect_offset
,
1907 struct dwarf2_per_cu_data
*);
1909 static struct type
*get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
);
1911 static void queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
1912 enum language pretend_language
);
1914 static void process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
1916 /* Class, the destructor of which frees all allocated queue entries. This
1917 will only have work to do if an error was thrown while processing the
1918 dwarf. If no error was thrown then the queue entries should have all
1919 been processed, and freed, as we went along. */
1921 class dwarf2_queue_guard
1924 dwarf2_queue_guard () = default;
1926 /* Free any entries remaining on the queue. There should only be
1927 entries left if we hit an error while processing the dwarf. */
1928 ~dwarf2_queue_guard ()
1930 struct dwarf2_queue_item
*item
, *last
;
1932 item
= dwarf2_queue
;
1935 /* Anything still marked queued is likely to be in an
1936 inconsistent state, so discard it. */
1937 if (item
->per_cu
->queued
)
1939 if (item
->per_cu
->cu
!= NULL
)
1940 free_one_cached_comp_unit (item
->per_cu
);
1941 item
->per_cu
->queued
= 0;
1949 dwarf2_queue
= dwarf2_queue_tail
= NULL
;
1953 /* The return type of find_file_and_directory. Note, the enclosed
1954 string pointers are only valid while this object is valid. */
1956 struct file_and_directory
1958 /* The filename. This is never NULL. */
1961 /* The compilation directory. NULL if not known. If we needed to
1962 compute a new string, this points to COMP_DIR_STORAGE, otherwise,
1963 points directly to the DW_AT_comp_dir string attribute owned by
1964 the obstack that owns the DIE. */
1965 const char *comp_dir
;
1967 /* If we needed to build a new string for comp_dir, this is what
1968 owns the storage. */
1969 std::string comp_dir_storage
;
1972 static file_and_directory
find_file_and_directory (struct die_info
*die
,
1973 struct dwarf2_cu
*cu
);
1975 static char *file_full_name (int file
, struct line_header
*lh
,
1976 const char *comp_dir
);
1978 /* Expected enum dwarf_unit_type for read_comp_unit_head. */
1979 enum class rcuh_kind
{ COMPILE
, TYPE
};
1981 static const gdb_byte
*read_and_check_comp_unit_head
1982 (struct dwarf2_per_objfile
* dwarf2_per_objfile
,
1983 struct comp_unit_head
*header
,
1984 struct dwarf2_section_info
*section
,
1985 struct dwarf2_section_info
*abbrev_section
, const gdb_byte
*info_ptr
,
1986 rcuh_kind section_kind
);
1988 static void init_cutu_and_read_dies
1989 (struct dwarf2_per_cu_data
*this_cu
, struct abbrev_table
*abbrev_table
,
1990 int use_existing_cu
, int keep
, bool skip_partial
,
1991 die_reader_func_ftype
*die_reader_func
, void *data
);
1993 static void init_cutu_and_read_dies_simple
1994 (struct dwarf2_per_cu_data
*this_cu
,
1995 die_reader_func_ftype
*die_reader_func
, void *data
);
1997 static htab_t
allocate_signatured_type_table (struct objfile
*objfile
);
1999 static htab_t
allocate_dwo_unit_table (struct objfile
*objfile
);
2001 static struct dwo_unit
*lookup_dwo_unit_in_dwp
2002 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2003 struct dwp_file
*dwp_file
, const char *comp_dir
,
2004 ULONGEST signature
, int is_debug_types
);
2006 static struct dwp_file
*get_dwp_file
2007 (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
2009 static struct dwo_unit
*lookup_dwo_comp_unit
2010 (struct dwarf2_per_cu_data
*, const char *, const char *, ULONGEST
);
2012 static struct dwo_unit
*lookup_dwo_type_unit
2013 (struct signatured_type
*, const char *, const char *);
2015 static void queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*);
2017 static void free_dwo_file (struct dwo_file
*);
2019 /* A unique_ptr helper to free a dwo_file. */
2021 struct dwo_file_deleter
2023 void operator() (struct dwo_file
*df
) const
2029 /* A unique pointer to a dwo_file. */
2031 typedef std::unique_ptr
<struct dwo_file
, dwo_file_deleter
> dwo_file_up
;
2033 static void process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
);
2035 static void check_producer (struct dwarf2_cu
*cu
);
2037 static void free_line_header_voidp (void *arg
);
2039 /* Various complaints about symbol reading that don't abort the process. */
2042 dwarf2_statement_list_fits_in_line_number_section_complaint (void)
2044 complaint (_("statement list doesn't fit in .debug_line section"));
2048 dwarf2_debug_line_missing_file_complaint (void)
2050 complaint (_(".debug_line section has line data without a file"));
2054 dwarf2_debug_line_missing_end_sequence_complaint (void)
2056 complaint (_(".debug_line section has line "
2057 "program sequence without an end"));
2061 dwarf2_complex_location_expr_complaint (void)
2063 complaint (_("location expression too complex"));
2067 dwarf2_const_value_length_mismatch_complaint (const char *arg1
, int arg2
,
2070 complaint (_("const value length mismatch for '%s', got %d, expected %d"),
2075 dwarf2_section_buffer_overflow_complaint (struct dwarf2_section_info
*section
)
2077 complaint (_("debug info runs off end of %s section"
2079 get_section_name (section
),
2080 get_section_file_name (section
));
2084 dwarf2_macro_malformed_definition_complaint (const char *arg1
)
2086 complaint (_("macro debug info contains a "
2087 "malformed macro definition:\n`%s'"),
2092 dwarf2_invalid_attrib_class_complaint (const char *arg1
, const char *arg2
)
2094 complaint (_("invalid attribute class or form for '%s' in '%s'"),
2098 /* Hash function for line_header_hash. */
2101 line_header_hash (const struct line_header
*ofs
)
2103 return to_underlying (ofs
->sect_off
) ^ ofs
->offset_in_dwz
;
2106 /* Hash function for htab_create_alloc_ex for line_header_hash. */
2109 line_header_hash_voidp (const void *item
)
2111 const struct line_header
*ofs
= (const struct line_header
*) item
;
2113 return line_header_hash (ofs
);
2116 /* Equality function for line_header_hash. */
2119 line_header_eq_voidp (const void *item_lhs
, const void *item_rhs
)
2121 const struct line_header
*ofs_lhs
= (const struct line_header
*) item_lhs
;
2122 const struct line_header
*ofs_rhs
= (const struct line_header
*) item_rhs
;
2124 return (ofs_lhs
->sect_off
== ofs_rhs
->sect_off
2125 && ofs_lhs
->offset_in_dwz
== ofs_rhs
->offset_in_dwz
);
2130 /* Read the given attribute value as an address, taking the attribute's
2131 form into account. */
2134 attr_value_as_address (struct attribute
*attr
)
2138 if (attr
->form
!= DW_FORM_addr
&& attr
->form
!= DW_FORM_addrx
2139 && attr
->form
!= DW_FORM_GNU_addr_index
)
2141 /* Aside from a few clearly defined exceptions, attributes that
2142 contain an address must always be in DW_FORM_addr form.
2143 Unfortunately, some compilers happen to be violating this
2144 requirement by encoding addresses using other forms, such
2145 as DW_FORM_data4 for example. For those broken compilers,
2146 we try to do our best, without any guarantee of success,
2147 to interpret the address correctly. It would also be nice
2148 to generate a complaint, but that would require us to maintain
2149 a list of legitimate cases where a non-address form is allowed,
2150 as well as update callers to pass in at least the CU's DWARF
2151 version. This is more overhead than what we're willing to
2152 expand for a pretty rare case. */
2153 addr
= DW_UNSND (attr
);
2156 addr
= DW_ADDR (attr
);
2161 /* See declaration. */
2163 dwarf2_per_objfile::dwarf2_per_objfile (struct objfile
*objfile_
,
2164 const dwarf2_debug_sections
*names
)
2165 : objfile (objfile_
)
2168 names
= &dwarf2_elf_names
;
2170 bfd
*obfd
= objfile
->obfd
;
2172 for (asection
*sec
= obfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
2173 locate_sections (obfd
, sec
, *names
);
2176 static void free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
);
2178 dwarf2_per_objfile::~dwarf2_per_objfile ()
2180 /* Cached DIE trees use xmalloc and the comp_unit_obstack. */
2181 free_cached_comp_units ();
2183 if (quick_file_names_table
)
2184 htab_delete (quick_file_names_table
);
2186 if (line_header_hash
)
2187 htab_delete (line_header_hash
);
2189 for (dwarf2_per_cu_data
*per_cu
: all_comp_units
)
2190 VEC_free (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
);
2192 for (signatured_type
*sig_type
: all_type_units
)
2193 VEC_free (dwarf2_per_cu_ptr
, sig_type
->per_cu
.imported_symtabs
);
2195 VEC_free (dwarf2_section_info_def
, types
);
2197 if (dwo_files
!= NULL
)
2198 free_dwo_files (dwo_files
, objfile
);
2200 /* Everything else should be on the objfile obstack. */
2203 /* See declaration. */
2206 dwarf2_per_objfile::free_cached_comp_units ()
2208 dwarf2_per_cu_data
*per_cu
= read_in_chain
;
2209 dwarf2_per_cu_data
**last_chain
= &read_in_chain
;
2210 while (per_cu
!= NULL
)
2212 dwarf2_per_cu_data
*next_cu
= per_cu
->cu
->read_in_chain
;
2215 *last_chain
= next_cu
;
2220 /* A helper class that calls free_cached_comp_units on
2223 class free_cached_comp_units
2227 explicit free_cached_comp_units (dwarf2_per_objfile
*per_objfile
)
2228 : m_per_objfile (per_objfile
)
2232 ~free_cached_comp_units ()
2234 m_per_objfile
->free_cached_comp_units ();
2237 DISABLE_COPY_AND_ASSIGN (free_cached_comp_units
);
2241 dwarf2_per_objfile
*m_per_objfile
;
2244 /* Try to locate the sections we need for DWARF 2 debugging
2245 information and return true if we have enough to do something.
2246 NAMES points to the dwarf2 section names, or is NULL if the standard
2247 ELF names are used. */
2250 dwarf2_has_info (struct objfile
*objfile
,
2251 const struct dwarf2_debug_sections
*names
)
2253 if (objfile
->flags
& OBJF_READNEVER
)
2256 struct dwarf2_per_objfile
*dwarf2_per_objfile
2257 = get_dwarf2_per_objfile (objfile
);
2259 if (dwarf2_per_objfile
== NULL
)
2260 dwarf2_per_objfile
= dwarf2_objfile_data_key
.emplace (objfile
, objfile
,
2263 return (!dwarf2_per_objfile
->info
.is_virtual
2264 && dwarf2_per_objfile
->info
.s
.section
!= NULL
2265 && !dwarf2_per_objfile
->abbrev
.is_virtual
2266 && dwarf2_per_objfile
->abbrev
.s
.section
!= NULL
);
2269 /* Return the containing section of virtual section SECTION. */
2271 static struct dwarf2_section_info
*
2272 get_containing_section (const struct dwarf2_section_info
*section
)
2274 gdb_assert (section
->is_virtual
);
2275 return section
->s
.containing_section
;
2278 /* Return the bfd owner of SECTION. */
2281 get_section_bfd_owner (const struct dwarf2_section_info
*section
)
2283 if (section
->is_virtual
)
2285 section
= get_containing_section (section
);
2286 gdb_assert (!section
->is_virtual
);
2288 return section
->s
.section
->owner
;
2291 /* Return the bfd section of SECTION.
2292 Returns NULL if the section is not present. */
2295 get_section_bfd_section (const struct dwarf2_section_info
*section
)
2297 if (section
->is_virtual
)
2299 section
= get_containing_section (section
);
2300 gdb_assert (!section
->is_virtual
);
2302 return section
->s
.section
;
2305 /* Return the name of SECTION. */
2308 get_section_name (const struct dwarf2_section_info
*section
)
2310 asection
*sectp
= get_section_bfd_section (section
);
2312 gdb_assert (sectp
!= NULL
);
2313 return bfd_section_name (get_section_bfd_owner (section
), sectp
);
2316 /* Return the name of the file SECTION is in. */
2319 get_section_file_name (const struct dwarf2_section_info
*section
)
2321 bfd
*abfd
= get_section_bfd_owner (section
);
2323 return bfd_get_filename (abfd
);
2326 /* Return the id of SECTION.
2327 Returns 0 if SECTION doesn't exist. */
2330 get_section_id (const struct dwarf2_section_info
*section
)
2332 asection
*sectp
= get_section_bfd_section (section
);
2339 /* Return the flags of SECTION.
2340 SECTION (or containing section if this is a virtual section) must exist. */
2343 get_section_flags (const struct dwarf2_section_info
*section
)
2345 asection
*sectp
= get_section_bfd_section (section
);
2347 gdb_assert (sectp
!= NULL
);
2348 return bfd_get_section_flags (sectp
->owner
, sectp
);
2351 /* When loading sections, we look either for uncompressed section or for
2352 compressed section names. */
2355 section_is_p (const char *section_name
,
2356 const struct dwarf2_section_names
*names
)
2358 if (names
->normal
!= NULL
2359 && strcmp (section_name
, names
->normal
) == 0)
2361 if (names
->compressed
!= NULL
2362 && strcmp (section_name
, names
->compressed
) == 0)
2367 /* See declaration. */
2370 dwarf2_per_objfile::locate_sections (bfd
*abfd
, asection
*sectp
,
2371 const dwarf2_debug_sections
&names
)
2373 flagword aflag
= bfd_get_section_flags (abfd
, sectp
);
2375 if ((aflag
& SEC_HAS_CONTENTS
) == 0)
2378 else if (section_is_p (sectp
->name
, &names
.info
))
2380 this->info
.s
.section
= sectp
;
2381 this->info
.size
= bfd_get_section_size (sectp
);
2383 else if (section_is_p (sectp
->name
, &names
.abbrev
))
2385 this->abbrev
.s
.section
= sectp
;
2386 this->abbrev
.size
= bfd_get_section_size (sectp
);
2388 else if (section_is_p (sectp
->name
, &names
.line
))
2390 this->line
.s
.section
= sectp
;
2391 this->line
.size
= bfd_get_section_size (sectp
);
2393 else if (section_is_p (sectp
->name
, &names
.loc
))
2395 this->loc
.s
.section
= sectp
;
2396 this->loc
.size
= bfd_get_section_size (sectp
);
2398 else if (section_is_p (sectp
->name
, &names
.loclists
))
2400 this->loclists
.s
.section
= sectp
;
2401 this->loclists
.size
= bfd_get_section_size (sectp
);
2403 else if (section_is_p (sectp
->name
, &names
.macinfo
))
2405 this->macinfo
.s
.section
= sectp
;
2406 this->macinfo
.size
= bfd_get_section_size (sectp
);
2408 else if (section_is_p (sectp
->name
, &names
.macro
))
2410 this->macro
.s
.section
= sectp
;
2411 this->macro
.size
= bfd_get_section_size (sectp
);
2413 else if (section_is_p (sectp
->name
, &names
.str
))
2415 this->str
.s
.section
= sectp
;
2416 this->str
.size
= bfd_get_section_size (sectp
);
2418 else if (section_is_p (sectp
->name
, &names
.line_str
))
2420 this->line_str
.s
.section
= sectp
;
2421 this->line_str
.size
= bfd_get_section_size (sectp
);
2423 else if (section_is_p (sectp
->name
, &names
.addr
))
2425 this->addr
.s
.section
= sectp
;
2426 this->addr
.size
= bfd_get_section_size (sectp
);
2428 else if (section_is_p (sectp
->name
, &names
.frame
))
2430 this->frame
.s
.section
= sectp
;
2431 this->frame
.size
= bfd_get_section_size (sectp
);
2433 else if (section_is_p (sectp
->name
, &names
.eh_frame
))
2435 this->eh_frame
.s
.section
= sectp
;
2436 this->eh_frame
.size
= bfd_get_section_size (sectp
);
2438 else if (section_is_p (sectp
->name
, &names
.ranges
))
2440 this->ranges
.s
.section
= sectp
;
2441 this->ranges
.size
= bfd_get_section_size (sectp
);
2443 else if (section_is_p (sectp
->name
, &names
.rnglists
))
2445 this->rnglists
.s
.section
= sectp
;
2446 this->rnglists
.size
= bfd_get_section_size (sectp
);
2448 else if (section_is_p (sectp
->name
, &names
.types
))
2450 struct dwarf2_section_info type_section
;
2452 memset (&type_section
, 0, sizeof (type_section
));
2453 type_section
.s
.section
= sectp
;
2454 type_section
.size
= bfd_get_section_size (sectp
);
2456 VEC_safe_push (dwarf2_section_info_def
, this->types
,
2459 else if (section_is_p (sectp
->name
, &names
.gdb_index
))
2461 this->gdb_index
.s
.section
= sectp
;
2462 this->gdb_index
.size
= bfd_get_section_size (sectp
);
2464 else if (section_is_p (sectp
->name
, &names
.debug_names
))
2466 this->debug_names
.s
.section
= sectp
;
2467 this->debug_names
.size
= bfd_get_section_size (sectp
);
2469 else if (section_is_p (sectp
->name
, &names
.debug_aranges
))
2471 this->debug_aranges
.s
.section
= sectp
;
2472 this->debug_aranges
.size
= bfd_get_section_size (sectp
);
2475 if ((bfd_get_section_flags (abfd
, sectp
) & (SEC_LOAD
| SEC_ALLOC
))
2476 && bfd_section_vma (abfd
, sectp
) == 0)
2477 this->has_section_at_zero
= true;
2480 /* A helper function that decides whether a section is empty,
2484 dwarf2_section_empty_p (const struct dwarf2_section_info
*section
)
2486 if (section
->is_virtual
)
2487 return section
->size
== 0;
2488 return section
->s
.section
== NULL
|| section
->size
== 0;
2491 /* See dwarf2read.h. */
2494 dwarf2_read_section (struct objfile
*objfile
, dwarf2_section_info
*info
)
2498 gdb_byte
*buf
, *retbuf
;
2502 info
->buffer
= NULL
;
2505 if (dwarf2_section_empty_p (info
))
2508 sectp
= get_section_bfd_section (info
);
2510 /* If this is a virtual section we need to read in the real one first. */
2511 if (info
->is_virtual
)
2513 struct dwarf2_section_info
*containing_section
=
2514 get_containing_section (info
);
2516 gdb_assert (sectp
!= NULL
);
2517 if ((sectp
->flags
& SEC_RELOC
) != 0)
2519 error (_("Dwarf Error: DWP format V2 with relocations is not"
2520 " supported in section %s [in module %s]"),
2521 get_section_name (info
), get_section_file_name (info
));
2523 dwarf2_read_section (objfile
, containing_section
);
2524 /* Other code should have already caught virtual sections that don't
2526 gdb_assert (info
->virtual_offset
+ info
->size
2527 <= containing_section
->size
);
2528 /* If the real section is empty or there was a problem reading the
2529 section we shouldn't get here. */
2530 gdb_assert (containing_section
->buffer
!= NULL
);
2531 info
->buffer
= containing_section
->buffer
+ info
->virtual_offset
;
2535 /* If the section has relocations, we must read it ourselves.
2536 Otherwise we attach it to the BFD. */
2537 if ((sectp
->flags
& SEC_RELOC
) == 0)
2539 info
->buffer
= gdb_bfd_map_section (sectp
, &info
->size
);
2543 buf
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, info
->size
);
2546 /* When debugging .o files, we may need to apply relocations; see
2547 http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
2548 We never compress sections in .o files, so we only need to
2549 try this when the section is not compressed. */
2550 retbuf
= symfile_relocate_debug_section (objfile
, sectp
, buf
);
2553 info
->buffer
= retbuf
;
2557 abfd
= get_section_bfd_owner (info
);
2558 gdb_assert (abfd
!= NULL
);
2560 if (bfd_seek (abfd
, sectp
->filepos
, SEEK_SET
) != 0
2561 || bfd_bread (buf
, info
->size
, abfd
) != info
->size
)
2563 error (_("Dwarf Error: Can't read DWARF data"
2564 " in section %s [in module %s]"),
2565 bfd_section_name (abfd
, sectp
), bfd_get_filename (abfd
));
2569 /* A helper function that returns the size of a section in a safe way.
2570 If you are positive that the section has been read before using the
2571 size, then it is safe to refer to the dwarf2_section_info object's
2572 "size" field directly. In other cases, you must call this
2573 function, because for compressed sections the size field is not set
2574 correctly until the section has been read. */
2576 static bfd_size_type
2577 dwarf2_section_size (struct objfile
*objfile
,
2578 struct dwarf2_section_info
*info
)
2581 dwarf2_read_section (objfile
, info
);
2585 /* Fill in SECTP, BUFP and SIZEP with section info, given OBJFILE and
2589 dwarf2_get_section_info (struct objfile
*objfile
,
2590 enum dwarf2_section_enum sect
,
2591 asection
**sectp
, const gdb_byte
**bufp
,
2592 bfd_size_type
*sizep
)
2594 struct dwarf2_per_objfile
*data
= dwarf2_objfile_data_key
.get (objfile
);
2595 struct dwarf2_section_info
*info
;
2597 /* We may see an objfile without any DWARF, in which case we just
2608 case DWARF2_DEBUG_FRAME
:
2609 info
= &data
->frame
;
2611 case DWARF2_EH_FRAME
:
2612 info
= &data
->eh_frame
;
2615 gdb_assert_not_reached ("unexpected section");
2618 dwarf2_read_section (objfile
, info
);
2620 *sectp
= get_section_bfd_section (info
);
2621 *bufp
= info
->buffer
;
2622 *sizep
= info
->size
;
2625 /* A helper function to find the sections for a .dwz file. */
2628 locate_dwz_sections (bfd
*abfd
, asection
*sectp
, void *arg
)
2630 struct dwz_file
*dwz_file
= (struct dwz_file
*) arg
;
2632 /* Note that we only support the standard ELF names, because .dwz
2633 is ELF-only (at the time of writing). */
2634 if (section_is_p (sectp
->name
, &dwarf2_elf_names
.abbrev
))
2636 dwz_file
->abbrev
.s
.section
= sectp
;
2637 dwz_file
->abbrev
.size
= bfd_get_section_size (sectp
);
2639 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.info
))
2641 dwz_file
->info
.s
.section
= sectp
;
2642 dwz_file
->info
.size
= bfd_get_section_size (sectp
);
2644 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.str
))
2646 dwz_file
->str
.s
.section
= sectp
;
2647 dwz_file
->str
.size
= bfd_get_section_size (sectp
);
2649 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.line
))
2651 dwz_file
->line
.s
.section
= sectp
;
2652 dwz_file
->line
.size
= bfd_get_section_size (sectp
);
2654 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.macro
))
2656 dwz_file
->macro
.s
.section
= sectp
;
2657 dwz_file
->macro
.size
= bfd_get_section_size (sectp
);
2659 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.gdb_index
))
2661 dwz_file
->gdb_index
.s
.section
= sectp
;
2662 dwz_file
->gdb_index
.size
= bfd_get_section_size (sectp
);
2664 else if (section_is_p (sectp
->name
, &dwarf2_elf_names
.debug_names
))
2666 dwz_file
->debug_names
.s
.section
= sectp
;
2667 dwz_file
->debug_names
.size
= bfd_get_section_size (sectp
);
2671 /* Open the separate '.dwz' debug file, if needed. Return NULL if
2672 there is no .gnu_debugaltlink section in the file. Error if there
2673 is such a section but the file cannot be found. */
2675 static struct dwz_file
*
2676 dwarf2_get_dwz_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
2678 const char *filename
;
2679 bfd_size_type buildid_len_arg
;
2683 if (dwarf2_per_objfile
->dwz_file
!= NULL
)
2684 return dwarf2_per_objfile
->dwz_file
.get ();
2686 bfd_set_error (bfd_error_no_error
);
2687 gdb::unique_xmalloc_ptr
<char> data
2688 (bfd_get_alt_debug_link_info (dwarf2_per_objfile
->objfile
->obfd
,
2689 &buildid_len_arg
, &buildid
));
2692 if (bfd_get_error () == bfd_error_no_error
)
2694 error (_("could not read '.gnu_debugaltlink' section: %s"),
2695 bfd_errmsg (bfd_get_error ()));
2698 gdb::unique_xmalloc_ptr
<bfd_byte
> buildid_holder (buildid
);
2700 buildid_len
= (size_t) buildid_len_arg
;
2702 filename
= data
.get ();
2704 std::string abs_storage
;
2705 if (!IS_ABSOLUTE_PATH (filename
))
2707 gdb::unique_xmalloc_ptr
<char> abs
2708 = gdb_realpath (objfile_name (dwarf2_per_objfile
->objfile
));
2710 abs_storage
= ldirname (abs
.get ()) + SLASH_STRING
+ filename
;
2711 filename
= abs_storage
.c_str ();
2714 /* First try the file name given in the section. If that doesn't
2715 work, try to use the build-id instead. */
2716 gdb_bfd_ref_ptr
dwz_bfd (gdb_bfd_open (filename
, gnutarget
, -1));
2717 if (dwz_bfd
!= NULL
)
2719 if (!build_id_verify (dwz_bfd
.get (), buildid_len
, buildid
))
2720 dwz_bfd
.reset (nullptr);
2723 if (dwz_bfd
== NULL
)
2724 dwz_bfd
= build_id_to_debug_bfd (buildid_len
, buildid
);
2726 if (dwz_bfd
== NULL
)
2727 error (_("could not find '.gnu_debugaltlink' file for %s"),
2728 objfile_name (dwarf2_per_objfile
->objfile
));
2730 std::unique_ptr
<struct dwz_file
> result
2731 (new struct dwz_file (std::move (dwz_bfd
)));
2733 bfd_map_over_sections (result
->dwz_bfd
.get (), locate_dwz_sections
,
2736 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
,
2737 result
->dwz_bfd
.get ());
2738 dwarf2_per_objfile
->dwz_file
= std::move (result
);
2739 return dwarf2_per_objfile
->dwz_file
.get ();
2742 /* DWARF quick_symbols_functions support. */
2744 /* TUs can share .debug_line entries, and there can be a lot more TUs than
2745 unique line tables, so we maintain a separate table of all .debug_line
2746 derived entries to support the sharing.
2747 All the quick functions need is the list of file names. We discard the
2748 line_header when we're done and don't need to record it here. */
2749 struct quick_file_names
2751 /* The data used to construct the hash key. */
2752 struct stmt_list_hash hash
;
2754 /* The number of entries in file_names, real_names. */
2755 unsigned int num_file_names
;
2757 /* The file names from the line table, after being run through
2759 const char **file_names
;
2761 /* The file names from the line table after being run through
2762 gdb_realpath. These are computed lazily. */
2763 const char **real_names
;
2766 /* When using the index (and thus not using psymtabs), each CU has an
2767 object of this type. This is used to hold information needed by
2768 the various "quick" methods. */
2769 struct dwarf2_per_cu_quick_data
2771 /* The file table. This can be NULL if there was no file table
2772 or it's currently not read in.
2773 NOTE: This points into dwarf2_per_objfile->quick_file_names_table. */
2774 struct quick_file_names
*file_names
;
2776 /* The corresponding symbol table. This is NULL if symbols for this
2777 CU have not yet been read. */
2778 struct compunit_symtab
*compunit_symtab
;
2780 /* A temporary mark bit used when iterating over all CUs in
2781 expand_symtabs_matching. */
2782 unsigned int mark
: 1;
2784 /* True if we've tried to read the file table and found there isn't one.
2785 There will be no point in trying to read it again next time. */
2786 unsigned int no_file_data
: 1;
2789 /* Utility hash function for a stmt_list_hash. */
2792 hash_stmt_list_entry (const struct stmt_list_hash
*stmt_list_hash
)
2796 if (stmt_list_hash
->dwo_unit
!= NULL
)
2797 v
+= (uintptr_t) stmt_list_hash
->dwo_unit
->dwo_file
;
2798 v
+= to_underlying (stmt_list_hash
->line_sect_off
);
2802 /* Utility equality function for a stmt_list_hash. */
2805 eq_stmt_list_entry (const struct stmt_list_hash
*lhs
,
2806 const struct stmt_list_hash
*rhs
)
2808 if ((lhs
->dwo_unit
!= NULL
) != (rhs
->dwo_unit
!= NULL
))
2810 if (lhs
->dwo_unit
!= NULL
2811 && lhs
->dwo_unit
->dwo_file
!= rhs
->dwo_unit
->dwo_file
)
2814 return lhs
->line_sect_off
== rhs
->line_sect_off
;
2817 /* Hash function for a quick_file_names. */
2820 hash_file_name_entry (const void *e
)
2822 const struct quick_file_names
*file_data
2823 = (const struct quick_file_names
*) e
;
2825 return hash_stmt_list_entry (&file_data
->hash
);
2828 /* Equality function for a quick_file_names. */
2831 eq_file_name_entry (const void *a
, const void *b
)
2833 const struct quick_file_names
*ea
= (const struct quick_file_names
*) a
;
2834 const struct quick_file_names
*eb
= (const struct quick_file_names
*) b
;
2836 return eq_stmt_list_entry (&ea
->hash
, &eb
->hash
);
2839 /* Delete function for a quick_file_names. */
2842 delete_file_name_entry (void *e
)
2844 struct quick_file_names
*file_data
= (struct quick_file_names
*) e
;
2847 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
2849 xfree ((void*) file_data
->file_names
[i
]);
2850 if (file_data
->real_names
)
2851 xfree ((void*) file_data
->real_names
[i
]);
2854 /* The space for the struct itself lives on objfile_obstack,
2855 so we don't free it here. */
2858 /* Create a quick_file_names hash table. */
2861 create_quick_file_names_table (unsigned int nr_initial_entries
)
2863 return htab_create_alloc (nr_initial_entries
,
2864 hash_file_name_entry
, eq_file_name_entry
,
2865 delete_file_name_entry
, xcalloc
, xfree
);
2868 /* Read in PER_CU->CU. This function is unrelated to symtabs, symtab would
2869 have to be created afterwards. You should call age_cached_comp_units after
2870 processing PER_CU->CU. dw2_setup must have been already called. */
2873 load_cu (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2875 if (per_cu
->is_debug_types
)
2876 load_full_type_unit (per_cu
);
2878 load_full_comp_unit (per_cu
, skip_partial
, language_minimal
);
2880 if (per_cu
->cu
== NULL
)
2881 return; /* Dummy CU. */
2883 dwarf2_find_base_address (per_cu
->cu
->dies
, per_cu
->cu
);
2886 /* Read in the symbols for PER_CU. */
2889 dw2_do_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2891 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2893 /* Skip type_unit_groups, reading the type units they contain
2894 is handled elsewhere. */
2895 if (IS_TYPE_UNIT_GROUP (per_cu
))
2898 /* The destructor of dwarf2_queue_guard frees any entries left on
2899 the queue. After this point we're guaranteed to leave this function
2900 with the dwarf queue empty. */
2901 dwarf2_queue_guard q_guard
;
2903 if (dwarf2_per_objfile
->using_index
2904 ? per_cu
->v
.quick
->compunit_symtab
== NULL
2905 : (per_cu
->v
.psymtab
== NULL
|| !per_cu
->v
.psymtab
->readin
))
2907 queue_comp_unit (per_cu
, language_minimal
);
2908 load_cu (per_cu
, skip_partial
);
2910 /* If we just loaded a CU from a DWO, and we're working with an index
2911 that may badly handle TUs, load all the TUs in that DWO as well.
2912 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
2913 if (!per_cu
->is_debug_types
2914 && per_cu
->cu
!= NULL
2915 && per_cu
->cu
->dwo_unit
!= NULL
2916 && dwarf2_per_objfile
->index_table
!= NULL
2917 && dwarf2_per_objfile
->index_table
->version
<= 7
2918 /* DWP files aren't supported yet. */
2919 && get_dwp_file (dwarf2_per_objfile
) == NULL
)
2920 queue_and_load_all_dwo_tus (per_cu
);
2923 process_queue (dwarf2_per_objfile
);
2925 /* Age the cache, releasing compilation units that have not
2926 been used recently. */
2927 age_cached_comp_units (dwarf2_per_objfile
);
2930 /* Ensure that the symbols for PER_CU have been read in. OBJFILE is
2931 the objfile from which this CU came. Returns the resulting symbol
2934 static struct compunit_symtab
*
2935 dw2_instantiate_symtab (struct dwarf2_per_cu_data
*per_cu
, bool skip_partial
)
2937 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
2939 gdb_assert (dwarf2_per_objfile
->using_index
);
2940 if (!per_cu
->v
.quick
->compunit_symtab
)
2942 free_cached_comp_units
freer (dwarf2_per_objfile
);
2943 scoped_restore decrementer
= increment_reading_symtab ();
2944 dw2_do_instantiate_symtab (per_cu
, skip_partial
);
2945 process_cu_includes (dwarf2_per_objfile
);
2948 return per_cu
->v
.quick
->compunit_symtab
;
2951 /* See declaration. */
2953 dwarf2_per_cu_data
*
2954 dwarf2_per_objfile::get_cutu (int index
)
2956 if (index
>= this->all_comp_units
.size ())
2958 index
-= this->all_comp_units
.size ();
2959 gdb_assert (index
< this->all_type_units
.size ());
2960 return &this->all_type_units
[index
]->per_cu
;
2963 return this->all_comp_units
[index
];
2966 /* See declaration. */
2968 dwarf2_per_cu_data
*
2969 dwarf2_per_objfile::get_cu (int index
)
2971 gdb_assert (index
>= 0 && index
< this->all_comp_units
.size ());
2973 return this->all_comp_units
[index
];
2976 /* See declaration. */
2979 dwarf2_per_objfile::get_tu (int index
)
2981 gdb_assert (index
>= 0 && index
< this->all_type_units
.size ());
2983 return this->all_type_units
[index
];
2986 /* Return a new dwarf2_per_cu_data allocated on OBJFILE's
2987 objfile_obstack, and constructed with the specified field
2990 static dwarf2_per_cu_data
*
2991 create_cu_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
2992 struct dwarf2_section_info
*section
,
2994 sect_offset sect_off
, ULONGEST length
)
2996 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
2997 dwarf2_per_cu_data
*the_cu
2998 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2999 struct dwarf2_per_cu_data
);
3000 the_cu
->sect_off
= sect_off
;
3001 the_cu
->length
= length
;
3002 the_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3003 the_cu
->section
= section
;
3004 the_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3005 struct dwarf2_per_cu_quick_data
);
3006 the_cu
->is_dwz
= is_dwz
;
3010 /* A helper for create_cus_from_index that handles a given list of
3014 create_cus_from_index_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3015 const gdb_byte
*cu_list
, offset_type n_elements
,
3016 struct dwarf2_section_info
*section
,
3019 for (offset_type i
= 0; i
< n_elements
; i
+= 2)
3021 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3023 sect_offset sect_off
3024 = (sect_offset
) extract_unsigned_integer (cu_list
, 8, BFD_ENDIAN_LITTLE
);
3025 ULONGEST length
= extract_unsigned_integer (cu_list
+ 8, 8, BFD_ENDIAN_LITTLE
);
3028 dwarf2_per_cu_data
*per_cu
3029 = create_cu_from_index_list (dwarf2_per_objfile
, section
, is_dwz
,
3031 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
3035 /* Read the CU list from the mapped index, and use it to create all
3036 the CU objects for this objfile. */
3039 create_cus_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3040 const gdb_byte
*cu_list
, offset_type cu_list_elements
,
3041 const gdb_byte
*dwz_list
, offset_type dwz_elements
)
3043 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
3044 dwarf2_per_objfile
->all_comp_units
.reserve
3045 ((cu_list_elements
+ dwz_elements
) / 2);
3047 create_cus_from_index_list (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3048 &dwarf2_per_objfile
->info
, 0);
3050 if (dwz_elements
== 0)
3053 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3054 create_cus_from_index_list (dwarf2_per_objfile
, dwz_list
, dwz_elements
,
3058 /* Create the signatured type hash table from the index. */
3061 create_signatured_type_table_from_index
3062 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3063 struct dwarf2_section_info
*section
,
3064 const gdb_byte
*bytes
,
3065 offset_type elements
)
3067 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3069 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3070 dwarf2_per_objfile
->all_type_units
.reserve (elements
/ 3);
3072 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3074 for (offset_type i
= 0; i
< elements
; i
+= 3)
3076 struct signatured_type
*sig_type
;
3079 cu_offset type_offset_in_tu
;
3081 gdb_static_assert (sizeof (ULONGEST
) >= 8);
3082 sect_offset sect_off
3083 = (sect_offset
) extract_unsigned_integer (bytes
, 8, BFD_ENDIAN_LITTLE
);
3085 = (cu_offset
) extract_unsigned_integer (bytes
+ 8, 8,
3087 signature
= extract_unsigned_integer (bytes
+ 16, 8, BFD_ENDIAN_LITTLE
);
3090 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3091 struct signatured_type
);
3092 sig_type
->signature
= signature
;
3093 sig_type
->type_offset_in_tu
= type_offset_in_tu
;
3094 sig_type
->per_cu
.is_debug_types
= 1;
3095 sig_type
->per_cu
.section
= section
;
3096 sig_type
->per_cu
.sect_off
= sect_off
;
3097 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3098 sig_type
->per_cu
.v
.quick
3099 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3100 struct dwarf2_per_cu_quick_data
);
3102 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3105 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3108 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3111 /* Create the signatured type hash table from .debug_names. */
3114 create_signatured_type_table_from_debug_names
3115 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3116 const mapped_debug_names
&map
,
3117 struct dwarf2_section_info
*section
,
3118 struct dwarf2_section_info
*abbrev_section
)
3120 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3122 dwarf2_read_section (objfile
, section
);
3123 dwarf2_read_section (objfile
, abbrev_section
);
3125 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
3126 dwarf2_per_objfile
->all_type_units
.reserve (map
.tu_count
);
3128 htab_t sig_types_hash
= allocate_signatured_type_table (objfile
);
3130 for (uint32_t i
= 0; i
< map
.tu_count
; ++i
)
3132 struct signatured_type
*sig_type
;
3135 sect_offset sect_off
3136 = (sect_offset
) (extract_unsigned_integer
3137 (map
.tu_table_reordered
+ i
* map
.offset_size
,
3139 map
.dwarf5_byte_order
));
3141 comp_unit_head cu_header
;
3142 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
3144 section
->buffer
+ to_underlying (sect_off
),
3147 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3148 struct signatured_type
);
3149 sig_type
->signature
= cu_header
.signature
;
3150 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
3151 sig_type
->per_cu
.is_debug_types
= 1;
3152 sig_type
->per_cu
.section
= section
;
3153 sig_type
->per_cu
.sect_off
= sect_off
;
3154 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
3155 sig_type
->per_cu
.v
.quick
3156 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
3157 struct dwarf2_per_cu_quick_data
);
3159 slot
= htab_find_slot (sig_types_hash
, sig_type
, INSERT
);
3162 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
3165 dwarf2_per_objfile
->signatured_types
= sig_types_hash
;
3168 /* Read the address map data from the mapped index, and use it to
3169 populate the objfile's psymtabs_addrmap. */
3172 create_addrmap_from_index (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3173 struct mapped_index
*index
)
3175 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3176 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3177 const gdb_byte
*iter
, *end
;
3178 struct addrmap
*mutable_map
;
3181 auto_obstack temp_obstack
;
3183 mutable_map
= addrmap_create_mutable (&temp_obstack
);
3185 iter
= index
->address_table
.data ();
3186 end
= iter
+ index
->address_table
.size ();
3188 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
3192 ULONGEST hi
, lo
, cu_index
;
3193 lo
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3195 hi
= extract_unsigned_integer (iter
, 8, BFD_ENDIAN_LITTLE
);
3197 cu_index
= extract_unsigned_integer (iter
, 4, BFD_ENDIAN_LITTLE
);
3202 complaint (_(".gdb_index address table has invalid range (%s - %s)"),
3203 hex_string (lo
), hex_string (hi
));
3207 if (cu_index
>= dwarf2_per_objfile
->all_comp_units
.size ())
3209 complaint (_(".gdb_index address table has invalid CU number %u"),
3210 (unsigned) cu_index
);
3214 lo
= gdbarch_adjust_dwarf2_addr (gdbarch
, lo
+ baseaddr
) - baseaddr
;
3215 hi
= gdbarch_adjust_dwarf2_addr (gdbarch
, hi
+ baseaddr
) - baseaddr
;
3216 addrmap_set_empty (mutable_map
, lo
, hi
- 1,
3217 dwarf2_per_objfile
->get_cu (cu_index
));
3220 objfile
->partial_symtabs
->psymtabs_addrmap
3221 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
3224 /* Read the address map data from DWARF-5 .debug_aranges, and use it to
3225 populate the objfile's psymtabs_addrmap. */
3228 create_addrmap_from_aranges (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3229 struct dwarf2_section_info
*section
)
3231 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3232 bfd
*abfd
= objfile
->obfd
;
3233 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3234 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
3235 SECT_OFF_TEXT (objfile
));
3237 auto_obstack temp_obstack
;
3238 addrmap
*mutable_map
= addrmap_create_mutable (&temp_obstack
);
3240 std::unordered_map
<sect_offset
,
3241 dwarf2_per_cu_data
*,
3242 gdb::hash_enum
<sect_offset
>>
3243 debug_info_offset_to_per_cu
;
3244 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3246 const auto insertpair
3247 = debug_info_offset_to_per_cu
.emplace (per_cu
->sect_off
, per_cu
);
3248 if (!insertpair
.second
)
3250 warning (_("Section .debug_aranges in %s has duplicate "
3251 "debug_info_offset %s, ignoring .debug_aranges."),
3252 objfile_name (objfile
), sect_offset_str (per_cu
->sect_off
));
3257 dwarf2_read_section (objfile
, section
);
3259 const bfd_endian dwarf5_byte_order
= gdbarch_byte_order (gdbarch
);
3261 const gdb_byte
*addr
= section
->buffer
;
3263 while (addr
< section
->buffer
+ section
->size
)
3265 const gdb_byte
*const entry_addr
= addr
;
3266 unsigned int bytes_read
;
3268 const LONGEST entry_length
= read_initial_length (abfd
, addr
,
3272 const gdb_byte
*const entry_end
= addr
+ entry_length
;
3273 const bool dwarf5_is_dwarf64
= bytes_read
!= 4;
3274 const uint8_t offset_size
= dwarf5_is_dwarf64
? 8 : 4;
3275 if (addr
+ entry_length
> section
->buffer
+ section
->size
)
3277 warning (_("Section .debug_aranges in %s entry at offset %zu "
3278 "length %s exceeds section length %s, "
3279 "ignoring .debug_aranges."),
3280 objfile_name (objfile
), entry_addr
- section
->buffer
,
3281 plongest (bytes_read
+ entry_length
),
3282 pulongest (section
->size
));
3286 /* The version number. */
3287 const uint16_t version
= read_2_bytes (abfd
, addr
);
3291 warning (_("Section .debug_aranges in %s entry at offset %zu "
3292 "has unsupported version %d, ignoring .debug_aranges."),
3293 objfile_name (objfile
), entry_addr
- section
->buffer
,
3298 const uint64_t debug_info_offset
3299 = extract_unsigned_integer (addr
, offset_size
, dwarf5_byte_order
);
3300 addr
+= offset_size
;
3301 const auto per_cu_it
3302 = debug_info_offset_to_per_cu
.find (sect_offset (debug_info_offset
));
3303 if (per_cu_it
== debug_info_offset_to_per_cu
.cend ())
3305 warning (_("Section .debug_aranges in %s entry at offset %zu "
3306 "debug_info_offset %s does not exists, "
3307 "ignoring .debug_aranges."),
3308 objfile_name (objfile
), entry_addr
- section
->buffer
,
3309 pulongest (debug_info_offset
));
3312 dwarf2_per_cu_data
*const per_cu
= per_cu_it
->second
;
3314 const uint8_t address_size
= *addr
++;
3315 if (address_size
< 1 || address_size
> 8)
3317 warning (_("Section .debug_aranges in %s entry at offset %zu "
3318 "address_size %u is invalid, ignoring .debug_aranges."),
3319 objfile_name (objfile
), entry_addr
- section
->buffer
,
3324 const uint8_t segment_selector_size
= *addr
++;
3325 if (segment_selector_size
!= 0)
3327 warning (_("Section .debug_aranges in %s entry at offset %zu "
3328 "segment_selector_size %u is not supported, "
3329 "ignoring .debug_aranges."),
3330 objfile_name (objfile
), entry_addr
- section
->buffer
,
3331 segment_selector_size
);
3335 /* Must pad to an alignment boundary that is twice the address
3336 size. It is undocumented by the DWARF standard but GCC does
3338 for (size_t padding
= ((-(addr
- section
->buffer
))
3339 & (2 * address_size
- 1));
3340 padding
> 0; padding
--)
3343 warning (_("Section .debug_aranges in %s entry at offset %zu "
3344 "padding is not zero, ignoring .debug_aranges."),
3345 objfile_name (objfile
), entry_addr
- section
->buffer
);
3351 if (addr
+ 2 * address_size
> entry_end
)
3353 warning (_("Section .debug_aranges in %s entry at offset %zu "
3354 "address list is not properly terminated, "
3355 "ignoring .debug_aranges."),
3356 objfile_name (objfile
), entry_addr
- section
->buffer
);
3359 ULONGEST start
= extract_unsigned_integer (addr
, address_size
,
3361 addr
+= address_size
;
3362 ULONGEST length
= extract_unsigned_integer (addr
, address_size
,
3364 addr
+= address_size
;
3365 if (start
== 0 && length
== 0)
3367 if (start
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
3369 /* Symbol was eliminated due to a COMDAT group. */
3372 ULONGEST end
= start
+ length
;
3373 start
= (gdbarch_adjust_dwarf2_addr (gdbarch
, start
+ baseaddr
)
3375 end
= (gdbarch_adjust_dwarf2_addr (gdbarch
, end
+ baseaddr
)
3377 addrmap_set_empty (mutable_map
, start
, end
- 1, per_cu
);
3381 objfile
->partial_symtabs
->psymtabs_addrmap
3382 = addrmap_create_fixed (mutable_map
, objfile
->partial_symtabs
->obstack ());
3385 /* Find a slot in the mapped index INDEX for the object named NAME.
3386 If NAME is found, set *VEC_OUT to point to the CU vector in the
3387 constant pool and return true. If NAME cannot be found, return
3391 find_slot_in_mapped_hash (struct mapped_index
*index
, const char *name
,
3392 offset_type
**vec_out
)
3395 offset_type slot
, step
;
3396 int (*cmp
) (const char *, const char *);
3398 gdb::unique_xmalloc_ptr
<char> without_params
;
3399 if (current_language
->la_language
== language_cplus
3400 || current_language
->la_language
== language_fortran
3401 || current_language
->la_language
== language_d
)
3403 /* NAME is already canonical. Drop any qualifiers as .gdb_index does
3406 if (strchr (name
, '(') != NULL
)
3408 without_params
= cp_remove_params (name
);
3410 if (without_params
!= NULL
)
3411 name
= without_params
.get ();
3415 /* Index version 4 did not support case insensitive searches. But the
3416 indices for case insensitive languages are built in lowercase, therefore
3417 simulate our NAME being searched is also lowercased. */
3418 hash
= mapped_index_string_hash ((index
->version
== 4
3419 && case_sensitivity
== case_sensitive_off
3420 ? 5 : index
->version
),
3423 slot
= hash
& (index
->symbol_table
.size () - 1);
3424 step
= ((hash
* 17) & (index
->symbol_table
.size () - 1)) | 1;
3425 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
3431 const auto &bucket
= index
->symbol_table
[slot
];
3432 if (bucket
.name
== 0 && bucket
.vec
== 0)
3435 str
= index
->constant_pool
+ MAYBE_SWAP (bucket
.name
);
3436 if (!cmp (name
, str
))
3438 *vec_out
= (offset_type
*) (index
->constant_pool
3439 + MAYBE_SWAP (bucket
.vec
));
3443 slot
= (slot
+ step
) & (index
->symbol_table
.size () - 1);
3447 /* A helper function that reads the .gdb_index from BUFFER and fills
3448 in MAP. FILENAME is the name of the file containing the data;
3449 it is used for error reporting. DEPRECATED_OK is true if it is
3450 ok to use deprecated sections.
3452 CU_LIST, CU_LIST_ELEMENTS, TYPES_LIST, and TYPES_LIST_ELEMENTS are
3453 out parameters that are filled in with information about the CU and
3454 TU lists in the section.
3456 Returns true if all went well, false otherwise. */
3459 read_gdb_index_from_buffer (struct objfile
*objfile
,
3460 const char *filename
,
3462 gdb::array_view
<const gdb_byte
> buffer
,
3463 struct mapped_index
*map
,
3464 const gdb_byte
**cu_list
,
3465 offset_type
*cu_list_elements
,
3466 const gdb_byte
**types_list
,
3467 offset_type
*types_list_elements
)
3469 const gdb_byte
*addr
= &buffer
[0];
3471 /* Version check. */
3472 offset_type version
= MAYBE_SWAP (*(offset_type
*) addr
);
3473 /* Versions earlier than 3 emitted every copy of a psymbol. This
3474 causes the index to behave very poorly for certain requests. Version 3
3475 contained incomplete addrmap. So, it seems better to just ignore such
3479 static int warning_printed
= 0;
3480 if (!warning_printed
)
3482 warning (_("Skipping obsolete .gdb_index section in %s."),
3484 warning_printed
= 1;
3488 /* Index version 4 uses a different hash function than index version
3491 Versions earlier than 6 did not emit psymbols for inlined
3492 functions. Using these files will cause GDB not to be able to
3493 set breakpoints on inlined functions by name, so we ignore these
3494 indices unless the user has done
3495 "set use-deprecated-index-sections on". */
3496 if (version
< 6 && !deprecated_ok
)
3498 static int warning_printed
= 0;
3499 if (!warning_printed
)
3502 Skipping deprecated .gdb_index section in %s.\n\
3503 Do \"set use-deprecated-index-sections on\" before the file is read\n\
3504 to use the section anyway."),
3506 warning_printed
= 1;
3510 /* Version 7 indices generated by gold refer to the CU for a symbol instead
3511 of the TU (for symbols coming from TUs),
3512 http://sourceware.org/bugzilla/show_bug.cgi?id=15021.
3513 Plus gold-generated indices can have duplicate entries for global symbols,
3514 http://sourceware.org/bugzilla/show_bug.cgi?id=15646.
3515 These are just performance bugs, and we can't distinguish gdb-generated
3516 indices from gold-generated ones, so issue no warning here. */
3518 /* Indexes with higher version than the one supported by GDB may be no
3519 longer backward compatible. */
3523 map
->version
= version
;
3525 offset_type
*metadata
= (offset_type
*) (addr
+ sizeof (offset_type
));
3528 *cu_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3529 *cu_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1]) - MAYBE_SWAP (metadata
[i
]))
3533 *types_list
= addr
+ MAYBE_SWAP (metadata
[i
]);
3534 *types_list_elements
= ((MAYBE_SWAP (metadata
[i
+ 1])
3535 - MAYBE_SWAP (metadata
[i
]))
3539 const gdb_byte
*address_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3540 const gdb_byte
*address_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3542 = gdb::array_view
<const gdb_byte
> (address_table
, address_table_end
);
3545 const gdb_byte
*symbol_table
= addr
+ MAYBE_SWAP (metadata
[i
]);
3546 const gdb_byte
*symbol_table_end
= addr
+ MAYBE_SWAP (metadata
[i
+ 1]);
3548 = gdb::array_view
<mapped_index::symbol_table_slot
>
3549 ((mapped_index::symbol_table_slot
*) symbol_table
,
3550 (mapped_index::symbol_table_slot
*) symbol_table_end
);
3553 map
->constant_pool
= (char *) (addr
+ MAYBE_SWAP (metadata
[i
]));
3558 /* Callback types for dwarf2_read_gdb_index. */
3560 typedef gdb::function_view
3561 <gdb::array_view
<const gdb_byte
>(objfile
*, dwarf2_per_objfile
*)>
3562 get_gdb_index_contents_ftype
;
3563 typedef gdb::function_view
3564 <gdb::array_view
<const gdb_byte
>(objfile
*, dwz_file
*)>
3565 get_gdb_index_contents_dwz_ftype
;
3567 /* Read .gdb_index. If everything went ok, initialize the "quick"
3568 elements of all the CUs and return 1. Otherwise, return 0. */
3571 dwarf2_read_gdb_index
3572 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3573 get_gdb_index_contents_ftype get_gdb_index_contents
,
3574 get_gdb_index_contents_dwz_ftype get_gdb_index_contents_dwz
)
3576 const gdb_byte
*cu_list
, *types_list
, *dwz_list
= NULL
;
3577 offset_type cu_list_elements
, types_list_elements
, dwz_list_elements
= 0;
3578 struct dwz_file
*dwz
;
3579 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3581 gdb::array_view
<const gdb_byte
> main_index_contents
3582 = get_gdb_index_contents (objfile
, dwarf2_per_objfile
);
3584 if (main_index_contents
.empty ())
3587 std::unique_ptr
<struct mapped_index
> map (new struct mapped_index
);
3588 if (!read_gdb_index_from_buffer (objfile
, objfile_name (objfile
),
3589 use_deprecated_index_sections
,
3590 main_index_contents
, map
.get (), &cu_list
,
3591 &cu_list_elements
, &types_list
,
3592 &types_list_elements
))
3595 /* Don't use the index if it's empty. */
3596 if (map
->symbol_table
.empty ())
3599 /* If there is a .dwz file, read it so we can get its CU list as
3601 dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
3604 struct mapped_index dwz_map
;
3605 const gdb_byte
*dwz_types_ignore
;
3606 offset_type dwz_types_elements_ignore
;
3608 gdb::array_view
<const gdb_byte
> dwz_index_content
3609 = get_gdb_index_contents_dwz (objfile
, dwz
);
3611 if (dwz_index_content
.empty ())
3614 if (!read_gdb_index_from_buffer (objfile
,
3615 bfd_get_filename (dwz
->dwz_bfd
), 1,
3616 dwz_index_content
, &dwz_map
,
3617 &dwz_list
, &dwz_list_elements
,
3619 &dwz_types_elements_ignore
))
3621 warning (_("could not read '.gdb_index' section from %s; skipping"),
3622 bfd_get_filename (dwz
->dwz_bfd
));
3627 create_cus_from_index (dwarf2_per_objfile
, cu_list
, cu_list_elements
,
3628 dwz_list
, dwz_list_elements
);
3630 if (types_list_elements
)
3632 struct dwarf2_section_info
*section
;
3634 /* We can only handle a single .debug_types when we have an
3636 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
3639 section
= VEC_index (dwarf2_section_info_def
,
3640 dwarf2_per_objfile
->types
, 0);
3642 create_signatured_type_table_from_index (dwarf2_per_objfile
, section
,
3643 types_list
, types_list_elements
);
3646 create_addrmap_from_index (dwarf2_per_objfile
, map
.get ());
3648 dwarf2_per_objfile
->index_table
= std::move (map
);
3649 dwarf2_per_objfile
->using_index
= 1;
3650 dwarf2_per_objfile
->quick_file_names_table
=
3651 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
3656 /* die_reader_func for dw2_get_file_names. */
3659 dw2_get_file_names_reader (const struct die_reader_specs
*reader
,
3660 const gdb_byte
*info_ptr
,
3661 struct die_info
*comp_unit_die
,
3665 struct dwarf2_cu
*cu
= reader
->cu
;
3666 struct dwarf2_per_cu_data
*this_cu
= cu
->per_cu
;
3667 struct dwarf2_per_objfile
*dwarf2_per_objfile
3668 = cu
->per_cu
->dwarf2_per_objfile
;
3669 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
3670 struct dwarf2_per_cu_data
*lh_cu
;
3671 struct attribute
*attr
;
3674 struct quick_file_names
*qfn
;
3676 gdb_assert (! this_cu
->is_debug_types
);
3678 /* Our callers never want to match partial units -- instead they
3679 will match the enclosing full CU. */
3680 if (comp_unit_die
->tag
== DW_TAG_partial_unit
)
3682 this_cu
->v
.quick
->no_file_data
= 1;
3690 sect_offset line_offset
{};
3692 attr
= dwarf2_attr (comp_unit_die
, DW_AT_stmt_list
, cu
);
3695 struct quick_file_names find_entry
;
3697 line_offset
= (sect_offset
) DW_UNSND (attr
);
3699 /* We may have already read in this line header (TU line header sharing).
3700 If we have we're done. */
3701 find_entry
.hash
.dwo_unit
= cu
->dwo_unit
;
3702 find_entry
.hash
.line_sect_off
= line_offset
;
3703 slot
= htab_find_slot (dwarf2_per_objfile
->quick_file_names_table
,
3704 &find_entry
, INSERT
);
3707 lh_cu
->v
.quick
->file_names
= (struct quick_file_names
*) *slot
;
3711 lh
= dwarf_decode_line_header (line_offset
, cu
);
3715 lh_cu
->v
.quick
->no_file_data
= 1;
3719 qfn
= XOBNEW (&objfile
->objfile_obstack
, struct quick_file_names
);
3720 qfn
->hash
.dwo_unit
= cu
->dwo_unit
;
3721 qfn
->hash
.line_sect_off
= line_offset
;
3722 gdb_assert (slot
!= NULL
);
3725 file_and_directory fnd
= find_file_and_directory (comp_unit_die
, cu
);
3727 qfn
->num_file_names
= lh
->file_names
.size ();
3729 XOBNEWVEC (&objfile
->objfile_obstack
, const char *, lh
->file_names
.size ());
3730 for (i
= 0; i
< lh
->file_names
.size (); ++i
)
3731 qfn
->file_names
[i
] = file_full_name (i
+ 1, lh
.get (), fnd
.comp_dir
);
3732 qfn
->real_names
= NULL
;
3734 lh_cu
->v
.quick
->file_names
= qfn
;
3737 /* A helper for the "quick" functions which attempts to read the line
3738 table for THIS_CU. */
3740 static struct quick_file_names
*
3741 dw2_get_file_names (struct dwarf2_per_cu_data
*this_cu
)
3743 /* This should never be called for TUs. */
3744 gdb_assert (! this_cu
->is_debug_types
);
3745 /* Nor type unit groups. */
3746 gdb_assert (! IS_TYPE_UNIT_GROUP (this_cu
));
3748 if (this_cu
->v
.quick
->file_names
!= NULL
)
3749 return this_cu
->v
.quick
->file_names
;
3750 /* If we know there is no line data, no point in looking again. */
3751 if (this_cu
->v
.quick
->no_file_data
)
3754 init_cutu_and_read_dies_simple (this_cu
, dw2_get_file_names_reader
, NULL
);
3756 if (this_cu
->v
.quick
->no_file_data
)
3758 return this_cu
->v
.quick
->file_names
;
3761 /* A helper for the "quick" functions which computes and caches the
3762 real path for a given file name from the line table. */
3765 dw2_get_real_path (struct objfile
*objfile
,
3766 struct quick_file_names
*qfn
, int index
)
3768 if (qfn
->real_names
== NULL
)
3769 qfn
->real_names
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
3770 qfn
->num_file_names
, const char *);
3772 if (qfn
->real_names
[index
] == NULL
)
3773 qfn
->real_names
[index
] = gdb_realpath (qfn
->file_names
[index
]).release ();
3775 return qfn
->real_names
[index
];
3778 static struct symtab
*
3779 dw2_find_last_source_symtab (struct objfile
*objfile
)
3781 struct dwarf2_per_objfile
*dwarf2_per_objfile
3782 = get_dwarf2_per_objfile (objfile
);
3783 dwarf2_per_cu_data
*dwarf_cu
= dwarf2_per_objfile
->all_comp_units
.back ();
3784 compunit_symtab
*cust
= dw2_instantiate_symtab (dwarf_cu
, false);
3789 return compunit_primary_filetab (cust
);
3792 /* Traversal function for dw2_forget_cached_source_info. */
3795 dw2_free_cached_file_names (void **slot
, void *info
)
3797 struct quick_file_names
*file_data
= (struct quick_file_names
*) *slot
;
3799 if (file_data
->real_names
)
3803 for (i
= 0; i
< file_data
->num_file_names
; ++i
)
3805 xfree ((void*) file_data
->real_names
[i
]);
3806 file_data
->real_names
[i
] = NULL
;
3814 dw2_forget_cached_source_info (struct objfile
*objfile
)
3816 struct dwarf2_per_objfile
*dwarf2_per_objfile
3817 = get_dwarf2_per_objfile (objfile
);
3819 htab_traverse_noresize (dwarf2_per_objfile
->quick_file_names_table
,
3820 dw2_free_cached_file_names
, NULL
);
3823 /* Helper function for dw2_map_symtabs_matching_filename that expands
3824 the symtabs and calls the iterator. */
3827 dw2_map_expand_apply (struct objfile
*objfile
,
3828 struct dwarf2_per_cu_data
*per_cu
,
3829 const char *name
, const char *real_path
,
3830 gdb::function_view
<bool (symtab
*)> callback
)
3832 struct compunit_symtab
*last_made
= objfile
->compunit_symtabs
;
3834 /* Don't visit already-expanded CUs. */
3835 if (per_cu
->v
.quick
->compunit_symtab
)
3838 /* This may expand more than one symtab, and we want to iterate over
3840 dw2_instantiate_symtab (per_cu
, false);
3842 return iterate_over_some_symtabs (name
, real_path
, objfile
->compunit_symtabs
,
3843 last_made
, callback
);
3846 /* Implementation of the map_symtabs_matching_filename method. */
3849 dw2_map_symtabs_matching_filename
3850 (struct objfile
*objfile
, const char *name
, const char *real_path
,
3851 gdb::function_view
<bool (symtab
*)> callback
)
3853 const char *name_basename
= lbasename (name
);
3854 struct dwarf2_per_objfile
*dwarf2_per_objfile
3855 = get_dwarf2_per_objfile (objfile
);
3857 /* The rule is CUs specify all the files, including those used by
3858 any TU, so there's no need to scan TUs here. */
3860 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
3862 /* We only need to look at symtabs not already expanded. */
3863 if (per_cu
->v
.quick
->compunit_symtab
)
3866 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
3867 if (file_data
== NULL
)
3870 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
3872 const char *this_name
= file_data
->file_names
[j
];
3873 const char *this_real_name
;
3875 if (compare_filenames_for_search (this_name
, name
))
3877 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3883 /* Before we invoke realpath, which can get expensive when many
3884 files are involved, do a quick comparison of the basenames. */
3885 if (! basenames_may_differ
3886 && FILENAME_CMP (lbasename (this_name
), name_basename
) != 0)
3889 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
3890 if (compare_filenames_for_search (this_real_name
, name
))
3892 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3898 if (real_path
!= NULL
)
3900 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
3901 gdb_assert (IS_ABSOLUTE_PATH (name
));
3902 if (this_real_name
!= NULL
3903 && FILENAME_CMP (real_path
, this_real_name
) == 0)
3905 if (dw2_map_expand_apply (objfile
, per_cu
, name
, real_path
,
3917 /* Struct used to manage iterating over all CUs looking for a symbol. */
3919 struct dw2_symtab_iterator
3921 /* The dwarf2_per_objfile owning the CUs we are iterating on. */
3922 struct dwarf2_per_objfile
*dwarf2_per_objfile
;
3923 /* If non-zero, only look for symbols that match BLOCK_INDEX. */
3924 int want_specific_block
;
3925 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
3926 Unused if !WANT_SPECIFIC_BLOCK. */
3928 /* The kind of symbol we're looking for. */
3930 /* The list of CUs from the index entry of the symbol,
3931 or NULL if not found. */
3933 /* The next element in VEC to look at. */
3935 /* The number of elements in VEC, or zero if there is no match. */
3937 /* Have we seen a global version of the symbol?
3938 If so we can ignore all further global instances.
3939 This is to work around gold/15646, inefficient gold-generated
3944 /* Initialize the index symtab iterator ITER.
3945 If WANT_SPECIFIC_BLOCK is non-zero, only look for symbols
3946 in block BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
3949 dw2_symtab_iter_init (struct dw2_symtab_iterator
*iter
,
3950 struct dwarf2_per_objfile
*dwarf2_per_objfile
,
3951 int want_specific_block
,
3956 iter
->dwarf2_per_objfile
= dwarf2_per_objfile
;
3957 iter
->want_specific_block
= want_specific_block
;
3958 iter
->block_index
= block_index
;
3959 iter
->domain
= domain
;
3961 iter
->global_seen
= 0;
3963 mapped_index
*index
= dwarf2_per_objfile
->index_table
.get ();
3965 /* index is NULL if OBJF_READNOW. */
3966 if (index
!= NULL
&& find_slot_in_mapped_hash (index
, name
, &iter
->vec
))
3967 iter
->length
= MAYBE_SWAP (*iter
->vec
);
3975 /* Return the next matching CU or NULL if there are no more. */
3977 static struct dwarf2_per_cu_data
*
3978 dw2_symtab_iter_next (struct dw2_symtab_iterator
*iter
)
3980 struct dwarf2_per_objfile
*dwarf2_per_objfile
= iter
->dwarf2_per_objfile
;
3982 for ( ; iter
->next
< iter
->length
; ++iter
->next
)
3984 offset_type cu_index_and_attrs
=
3985 MAYBE_SWAP (iter
->vec
[iter
->next
+ 1]);
3986 offset_type cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
3987 int want_static
= iter
->block_index
!= GLOBAL_BLOCK
;
3988 /* This value is only valid for index versions >= 7. */
3989 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
3990 gdb_index_symbol_kind symbol_kind
=
3991 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
3992 /* Only check the symbol attributes if they're present.
3993 Indices prior to version 7 don't record them,
3994 and indices >= 7 may elide them for certain symbols
3995 (gold does this). */
3997 (dwarf2_per_objfile
->index_table
->version
>= 7
3998 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
4000 /* Don't crash on bad data. */
4001 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
4002 + dwarf2_per_objfile
->all_type_units
.size ()))
4004 complaint (_(".gdb_index entry has bad CU index"
4006 objfile_name (dwarf2_per_objfile
->objfile
));
4010 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
4012 /* Skip if already read in. */
4013 if (per_cu
->v
.quick
->compunit_symtab
)
4016 /* Check static vs global. */
4019 if (iter
->want_specific_block
4020 && want_static
!= is_static
)
4022 /* Work around gold/15646. */
4023 if (!is_static
&& iter
->global_seen
)
4026 iter
->global_seen
= 1;
4029 /* Only check the symbol's kind if it has one. */
4032 switch (iter
->domain
)
4035 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
4036 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
4037 /* Some types are also in VAR_DOMAIN. */
4038 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4042 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
4046 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_OTHER
)
4061 static struct compunit_symtab
*
4062 dw2_lookup_symbol (struct objfile
*objfile
, int block_index
,
4063 const char *name
, domain_enum domain
)
4065 struct compunit_symtab
*stab_best
= NULL
;
4066 struct dwarf2_per_objfile
*dwarf2_per_objfile
4067 = get_dwarf2_per_objfile (objfile
);
4069 lookup_name_info
lookup_name (name
, symbol_name_match_type::FULL
);
4071 struct dw2_symtab_iterator iter
;
4072 struct dwarf2_per_cu_data
*per_cu
;
4074 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 1, block_index
, domain
, name
);
4076 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4078 struct symbol
*sym
, *with_opaque
= NULL
;
4079 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
4080 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
4081 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
4083 sym
= block_find_symbol (block
, name
, domain
,
4084 block_find_non_opaque_type_preferred
,
4087 /* Some caution must be observed with overloaded functions
4088 and methods, since the index will not contain any overload
4089 information (but NAME might contain it). */
4092 && SYMBOL_MATCHES_SEARCH_NAME (sym
, lookup_name
))
4094 if (with_opaque
!= NULL
4095 && SYMBOL_MATCHES_SEARCH_NAME (with_opaque
, lookup_name
))
4098 /* Keep looking through other CUs. */
4105 dw2_print_stats (struct objfile
*objfile
)
4107 struct dwarf2_per_objfile
*dwarf2_per_objfile
4108 = get_dwarf2_per_objfile (objfile
);
4109 int total
= (dwarf2_per_objfile
->all_comp_units
.size ()
4110 + dwarf2_per_objfile
->all_type_units
.size ());
4113 for (int i
= 0; i
< total
; ++i
)
4115 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4117 if (!per_cu
->v
.quick
->compunit_symtab
)
4120 printf_filtered (_(" Number of read CUs: %d\n"), total
- count
);
4121 printf_filtered (_(" Number of unread CUs: %d\n"), count
);
4124 /* This dumps minimal information about the index.
4125 It is called via "mt print objfiles".
4126 One use is to verify .gdb_index has been loaded by the
4127 gdb.dwarf2/gdb-index.exp testcase. */
4130 dw2_dump (struct objfile
*objfile
)
4132 struct dwarf2_per_objfile
*dwarf2_per_objfile
4133 = get_dwarf2_per_objfile (objfile
);
4135 gdb_assert (dwarf2_per_objfile
->using_index
);
4136 printf_filtered (".gdb_index:");
4137 if (dwarf2_per_objfile
->index_table
!= NULL
)
4139 printf_filtered (" version %d\n",
4140 dwarf2_per_objfile
->index_table
->version
);
4143 printf_filtered (" faked for \"readnow\"\n");
4144 printf_filtered ("\n");
4148 dw2_expand_symtabs_for_function (struct objfile
*objfile
,
4149 const char *func_name
)
4151 struct dwarf2_per_objfile
*dwarf2_per_objfile
4152 = get_dwarf2_per_objfile (objfile
);
4154 struct dw2_symtab_iterator iter
;
4155 struct dwarf2_per_cu_data
*per_cu
;
4157 /* Note: It doesn't matter what we pass for block_index here. */
4158 dw2_symtab_iter_init (&iter
, dwarf2_per_objfile
, 0, GLOBAL_BLOCK
, VAR_DOMAIN
,
4161 while ((per_cu
= dw2_symtab_iter_next (&iter
)) != NULL
)
4162 dw2_instantiate_symtab (per_cu
, false);
4167 dw2_expand_all_symtabs (struct objfile
*objfile
)
4169 struct dwarf2_per_objfile
*dwarf2_per_objfile
4170 = get_dwarf2_per_objfile (objfile
);
4171 int total_units
= (dwarf2_per_objfile
->all_comp_units
.size ()
4172 + dwarf2_per_objfile
->all_type_units
.size ());
4174 for (int i
= 0; i
< total_units
; ++i
)
4176 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
4178 /* We don't want to directly expand a partial CU, because if we
4179 read it with the wrong language, then assertion failures can
4180 be triggered later on. See PR symtab/23010. So, tell
4181 dw2_instantiate_symtab to skip partial CUs -- any important
4182 partial CU will be read via DW_TAG_imported_unit anyway. */
4183 dw2_instantiate_symtab (per_cu
, true);
4188 dw2_expand_symtabs_with_fullname (struct objfile
*objfile
,
4189 const char *fullname
)
4191 struct dwarf2_per_objfile
*dwarf2_per_objfile
4192 = get_dwarf2_per_objfile (objfile
);
4194 /* We don't need to consider type units here.
4195 This is only called for examining code, e.g. expand_line_sal.
4196 There can be an order of magnitude (or more) more type units
4197 than comp units, and we avoid them if we can. */
4199 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
4201 /* We only need to look at symtabs not already expanded. */
4202 if (per_cu
->v
.quick
->compunit_symtab
)
4205 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
4206 if (file_data
== NULL
)
4209 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
4211 const char *this_fullname
= file_data
->file_names
[j
];
4213 if (filename_cmp (this_fullname
, fullname
) == 0)
4215 dw2_instantiate_symtab (per_cu
, false);
4223 dw2_map_matching_symbols (struct objfile
*objfile
,
4224 const char * name
, domain_enum domain
,
4226 int (*callback
) (const struct block
*,
4227 struct symbol
*, void *),
4228 void *data
, symbol_name_match_type match
,
4229 symbol_compare_ftype
*ordered_compare
)
4231 /* Currently unimplemented; used for Ada. The function can be called if the
4232 current language is Ada for a non-Ada objfile using GNU index. As Ada
4233 does not look for non-Ada symbols this function should just return. */
4236 /* Symbol name matcher for .gdb_index names.
4238 Symbol names in .gdb_index have a few particularities:
4240 - There's no indication of which is the language of each symbol.
4242 Since each language has its own symbol name matching algorithm,
4243 and we don't know which language is the right one, we must match
4244 each symbol against all languages. This would be a potential
4245 performance problem if it were not mitigated by the
4246 mapped_index::name_components lookup table, which significantly
4247 reduces the number of times we need to call into this matcher,
4248 making it a non-issue.
4250 - Symbol names in the index have no overload (parameter)
4251 information. I.e., in C++, "foo(int)" and "foo(long)" both
4252 appear as "foo" in the index, for example.
4254 This means that the lookup names passed to the symbol name
4255 matcher functions must have no parameter information either
4256 because (e.g.) symbol search name "foo" does not match
4257 lookup-name "foo(int)" [while swapping search name for lookup
4260 class gdb_index_symbol_name_matcher
4263 /* Prepares the vector of comparison functions for LOOKUP_NAME. */
4264 gdb_index_symbol_name_matcher (const lookup_name_info
&lookup_name
);
4266 /* Walk all the matcher routines and match SYMBOL_NAME against them.
4267 Returns true if any matcher matches. */
4268 bool matches (const char *symbol_name
);
4271 /* A reference to the lookup name we're matching against. */
4272 const lookup_name_info
&m_lookup_name
;
4274 /* A vector holding all the different symbol name matchers, for all
4276 std::vector
<symbol_name_matcher_ftype
*> m_symbol_name_matcher_funcs
;
4279 gdb_index_symbol_name_matcher::gdb_index_symbol_name_matcher
4280 (const lookup_name_info
&lookup_name
)
4281 : m_lookup_name (lookup_name
)
4283 /* Prepare the vector of comparison functions upfront, to avoid
4284 doing the same work for each symbol. Care is taken to avoid
4285 matching with the same matcher more than once if/when multiple
4286 languages use the same matcher function. */
4287 auto &matchers
= m_symbol_name_matcher_funcs
;
4288 matchers
.reserve (nr_languages
);
4290 matchers
.push_back (default_symbol_name_matcher
);
4292 for (int i
= 0; i
< nr_languages
; i
++)
4294 const language_defn
*lang
= language_def ((enum language
) i
);
4295 symbol_name_matcher_ftype
*name_matcher
4296 = get_symbol_name_matcher (lang
, m_lookup_name
);
4298 /* Don't insert the same comparison routine more than once.
4299 Note that we do this linear walk instead of a seemingly
4300 cheaper sorted insert, or use a std::set or something like
4301 that, because relative order of function addresses is not
4302 stable. This is not a problem in practice because the number
4303 of supported languages is low, and the cost here is tiny
4304 compared to the number of searches we'll do afterwards using
4306 if (name_matcher
!= default_symbol_name_matcher
4307 && (std::find (matchers
.begin (), matchers
.end (), name_matcher
)
4308 == matchers
.end ()))
4309 matchers
.push_back (name_matcher
);
4314 gdb_index_symbol_name_matcher::matches (const char *symbol_name
)
4316 for (auto matches_name
: m_symbol_name_matcher_funcs
)
4317 if (matches_name (symbol_name
, m_lookup_name
, NULL
))
4323 /* Starting from a search name, return the string that finds the upper
4324 bound of all strings that start with SEARCH_NAME in a sorted name
4325 list. Returns the empty string to indicate that the upper bound is
4326 the end of the list. */
4329 make_sort_after_prefix_name (const char *search_name
)
4331 /* When looking to complete "func", we find the upper bound of all
4332 symbols that start with "func" by looking for where we'd insert
4333 the closest string that would follow "func" in lexicographical
4334 order. Usually, that's "func"-with-last-character-incremented,
4335 i.e. "fund". Mind non-ASCII characters, though. Usually those
4336 will be UTF-8 multi-byte sequences, but we can't be certain.
4337 Especially mind the 0xff character, which is a valid character in
4338 non-UTF-8 source character sets (e.g. Latin1 'ÿ'), and we can't
4339 rule out compilers allowing it in identifiers. Note that
4340 conveniently, strcmp/strcasecmp are specified to compare
4341 characters interpreted as unsigned char. So what we do is treat
4342 the whole string as a base 256 number composed of a sequence of
4343 base 256 "digits" and add 1 to it. I.e., adding 1 to 0xff wraps
4344 to 0, and carries 1 to the following more-significant position.
4345 If the very first character in SEARCH_NAME ends up incremented
4346 and carries/overflows, then the upper bound is the end of the
4347 list. The string after the empty string is also the empty
4350 Some examples of this operation:
4352 SEARCH_NAME => "+1" RESULT
4356 "\xff" "a" "\xff" => "\xff" "b"
4361 Then, with these symbols for example:
4367 completing "func" looks for symbols between "func" and
4368 "func"-with-last-character-incremented, i.e. "fund" (exclusive),
4369 which finds "func" and "func1", but not "fund".
4373 funcÿ (Latin1 'ÿ' [0xff])
4377 completing "funcÿ" looks for symbols between "funcÿ" and "fund"
4378 (exclusive), which finds "funcÿ" and "funcÿ1", but not "fund".
4382 ÿÿ (Latin1 'ÿ' [0xff])
4385 completing "ÿ" or "ÿÿ" looks for symbols between between "ÿÿ" and
4386 the end of the list.
4388 std::string after
= search_name
;
4389 while (!after
.empty () && (unsigned char) after
.back () == 0xff)
4391 if (!after
.empty ())
4392 after
.back () = (unsigned char) after
.back () + 1;
4396 /* See declaration. */
4398 std::pair
<std::vector
<name_component
>::const_iterator
,
4399 std::vector
<name_component
>::const_iterator
>
4400 mapped_index_base::find_name_components_bounds
4401 (const lookup_name_info
&lookup_name_without_params
) const
4404 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4407 = lookup_name_without_params
.cplus ().lookup_name ().c_str ();
4409 /* Comparison function object for lower_bound that matches against a
4410 given symbol name. */
4411 auto lookup_compare_lower
= [&] (const name_component
&elem
,
4414 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4415 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4416 return name_cmp (elem_name
, name
) < 0;
4419 /* Comparison function object for upper_bound that matches against a
4420 given symbol name. */
4421 auto lookup_compare_upper
= [&] (const char *name
,
4422 const name_component
&elem
)
4424 const char *elem_qualified
= this->symbol_name_at (elem
.idx
);
4425 const char *elem_name
= elem_qualified
+ elem
.name_offset
;
4426 return name_cmp (name
, elem_name
) < 0;
4429 auto begin
= this->name_components
.begin ();
4430 auto end
= this->name_components
.end ();
4432 /* Find the lower bound. */
4435 if (lookup_name_without_params
.completion_mode () && cplus
[0] == '\0')
4438 return std::lower_bound (begin
, end
, cplus
, lookup_compare_lower
);
4441 /* Find the upper bound. */
4444 if (lookup_name_without_params
.completion_mode ())
4446 /* In completion mode, we want UPPER to point past all
4447 symbols names that have the same prefix. I.e., with
4448 these symbols, and completing "func":
4450 function << lower bound
4452 other_function << upper bound
4454 We find the upper bound by looking for the insertion
4455 point of "func"-with-last-character-incremented,
4457 std::string after
= make_sort_after_prefix_name (cplus
);
4460 return std::lower_bound (lower
, end
, after
.c_str (),
4461 lookup_compare_lower
);
4464 return std::upper_bound (lower
, end
, cplus
, lookup_compare_upper
);
4467 return {lower
, upper
};
4470 /* See declaration. */
4473 mapped_index_base::build_name_components ()
4475 if (!this->name_components
.empty ())
4478 this->name_components_casing
= case_sensitivity
;
4480 = this->name_components_casing
== case_sensitive_on
? strcmp
: strcasecmp
;
4482 /* The code below only knows how to break apart components of C++
4483 symbol names (and other languages that use '::' as
4484 namespace/module separator). If we add support for wild matching
4485 to some language that uses some other operator (E.g., Ada, Go and
4486 D use '.'), then we'll need to try splitting the symbol name
4487 according to that language too. Note that Ada does support wild
4488 matching, but doesn't currently support .gdb_index. */
4489 auto count
= this->symbol_name_count ();
4490 for (offset_type idx
= 0; idx
< count
; idx
++)
4492 if (this->symbol_name_slot_invalid (idx
))
4495 const char *name
= this->symbol_name_at (idx
);
4497 /* Add each name component to the name component table. */
4498 unsigned int previous_len
= 0;
4499 for (unsigned int current_len
= cp_find_first_component (name
);
4500 name
[current_len
] != '\0';
4501 current_len
+= cp_find_first_component (name
+ current_len
))
4503 gdb_assert (name
[current_len
] == ':');
4504 this->name_components
.push_back ({previous_len
, idx
});
4505 /* Skip the '::'. */
4507 previous_len
= current_len
;
4509 this->name_components
.push_back ({previous_len
, idx
});
4512 /* Sort name_components elements by name. */
4513 auto name_comp_compare
= [&] (const name_component
&left
,
4514 const name_component
&right
)
4516 const char *left_qualified
= this->symbol_name_at (left
.idx
);
4517 const char *right_qualified
= this->symbol_name_at (right
.idx
);
4519 const char *left_name
= left_qualified
+ left
.name_offset
;
4520 const char *right_name
= right_qualified
+ right
.name_offset
;
4522 return name_cmp (left_name
, right_name
) < 0;
4525 std::sort (this->name_components
.begin (),
4526 this->name_components
.end (),
4530 /* Helper for dw2_expand_symtabs_matching that works with a
4531 mapped_index_base instead of the containing objfile. This is split
4532 to a separate function in order to be able to unit test the
4533 name_components matching using a mock mapped_index_base. For each
4534 symbol name that matches, calls MATCH_CALLBACK, passing it the
4535 symbol's index in the mapped_index_base symbol table. */
4538 dw2_expand_symtabs_matching_symbol
4539 (mapped_index_base
&index
,
4540 const lookup_name_info
&lookup_name_in
,
4541 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
4542 enum search_domain kind
,
4543 gdb::function_view
<void (offset_type
)> match_callback
)
4545 lookup_name_info lookup_name_without_params
4546 = lookup_name_in
.make_ignore_params ();
4547 gdb_index_symbol_name_matcher lookup_name_matcher
4548 (lookup_name_without_params
);
4550 /* Build the symbol name component sorted vector, if we haven't
4552 index
.build_name_components ();
4554 auto bounds
= index
.find_name_components_bounds (lookup_name_without_params
);
4556 /* Now for each symbol name in range, check to see if we have a name
4557 match, and if so, call the MATCH_CALLBACK callback. */
4559 /* The same symbol may appear more than once in the range though.
4560 E.g., if we're looking for symbols that complete "w", and we have
4561 a symbol named "w1::w2", we'll find the two name components for
4562 that same symbol in the range. To be sure we only call the
4563 callback once per symbol, we first collect the symbol name
4564 indexes that matched in a temporary vector and ignore
4566 std::vector
<offset_type
> matches
;
4567 matches
.reserve (std::distance (bounds
.first
, bounds
.second
));
4569 for (; bounds
.first
!= bounds
.second
; ++bounds
.first
)
4571 const char *qualified
= index
.symbol_name_at (bounds
.first
->idx
);
4573 if (!lookup_name_matcher
.matches (qualified
)
4574 || (symbol_matcher
!= NULL
&& !symbol_matcher (qualified
)))
4577 matches
.push_back (bounds
.first
->idx
);
4580 std::sort (matches
.begin (), matches
.end ());
4582 /* Finally call the callback, once per match. */
4584 for (offset_type idx
: matches
)
4588 match_callback (idx
);
4593 /* Above we use a type wider than idx's for 'prev', since 0 and
4594 (offset_type)-1 are both possible values. */
4595 static_assert (sizeof (prev
) > sizeof (offset_type
), "");
4600 namespace selftests
{ namespace dw2_expand_symtabs_matching
{
4602 /* A mock .gdb_index/.debug_names-like name index table, enough to
4603 exercise dw2_expand_symtabs_matching_symbol, which works with the
4604 mapped_index_base interface. Builds an index from the symbol list
4605 passed as parameter to the constructor. */
4606 class mock_mapped_index
: public mapped_index_base
4609 mock_mapped_index (gdb::array_view
<const char *> symbols
)
4610 : m_symbol_table (symbols
)
4613 DISABLE_COPY_AND_ASSIGN (mock_mapped_index
);
4615 /* Return the number of names in the symbol table. */
4616 size_t symbol_name_count () const override
4618 return m_symbol_table
.size ();
4621 /* Get the name of the symbol at IDX in the symbol table. */
4622 const char *symbol_name_at (offset_type idx
) const override
4624 return m_symbol_table
[idx
];
4628 gdb::array_view
<const char *> m_symbol_table
;
4631 /* Convenience function that converts a NULL pointer to a "<null>"
4632 string, to pass to print routines. */
4635 string_or_null (const char *str
)
4637 return str
!= NULL
? str
: "<null>";
4640 /* Check if a lookup_name_info built from
4641 NAME/MATCH_TYPE/COMPLETION_MODE matches the symbols in the mock
4642 index. EXPECTED_LIST is the list of expected matches, in expected
4643 matching order. If no match expected, then an empty list is
4644 specified. Returns true on success. On failure prints a warning
4645 indicating the file:line that failed, and returns false. */
4648 check_match (const char *file
, int line
,
4649 mock_mapped_index
&mock_index
,
4650 const char *name
, symbol_name_match_type match_type
,
4651 bool completion_mode
,
4652 std::initializer_list
<const char *> expected_list
)
4654 lookup_name_info
lookup_name (name
, match_type
, completion_mode
);
4656 bool matched
= true;
4658 auto mismatch
= [&] (const char *expected_str
,
4661 warning (_("%s:%d: match_type=%s, looking-for=\"%s\", "
4662 "expected=\"%s\", got=\"%s\"\n"),
4664 (match_type
== symbol_name_match_type::FULL
4666 name
, string_or_null (expected_str
), string_or_null (got
));
4670 auto expected_it
= expected_list
.begin ();
4671 auto expected_end
= expected_list
.end ();
4673 dw2_expand_symtabs_matching_symbol (mock_index
, lookup_name
,
4675 [&] (offset_type idx
)
4677 const char *matched_name
= mock_index
.symbol_name_at (idx
);
4678 const char *expected_str
4679 = expected_it
== expected_end
? NULL
: *expected_it
++;
4681 if (expected_str
== NULL
|| strcmp (expected_str
, matched_name
) != 0)
4682 mismatch (expected_str
, matched_name
);
4685 const char *expected_str
4686 = expected_it
== expected_end
? NULL
: *expected_it
++;
4687 if (expected_str
!= NULL
)
4688 mismatch (expected_str
, NULL
);
4693 /* The symbols added to the mock mapped_index for testing (in
4695 static const char *test_symbols
[] = {
4704 "ns2::tmpl<int>::foo2",
4705 "(anonymous namespace)::A::B::C",
4707 /* These are used to check that the increment-last-char in the
4708 matching algorithm for completion doesn't match "t1_fund" when
4709 completing "t1_func". */
4715 /* A UTF-8 name with multi-byte sequences to make sure that
4716 cp-name-parser understands this as a single identifier ("função"
4717 is "function" in PT). */
4720 /* \377 (0xff) is Latin1 'ÿ'. */
4723 /* \377 (0xff) is Latin1 'ÿ'. */
4727 /* A name with all sorts of complications. Starts with "z" to make
4728 it easier for the completion tests below. */
4729 #define Z_SYM_NAME \
4730 "z::std::tuple<(anonymous namespace)::ui*, std::bar<(anonymous namespace)::ui> >" \
4731 "::tuple<(anonymous namespace)::ui*, " \
4732 "std::default_delete<(anonymous namespace)::ui>, void>"
4737 /* Returns true if the mapped_index_base::find_name_component_bounds
4738 method finds EXPECTED_SYMS in INDEX when looking for SEARCH_NAME,
4739 in completion mode. */
4742 check_find_bounds_finds (mapped_index_base
&index
,
4743 const char *search_name
,
4744 gdb::array_view
<const char *> expected_syms
)
4746 lookup_name_info
lookup_name (search_name
,
4747 symbol_name_match_type::FULL
, true);
4749 auto bounds
= index
.find_name_components_bounds (lookup_name
);
4751 size_t distance
= std::distance (bounds
.first
, bounds
.second
);
4752 if (distance
!= expected_syms
.size ())
4755 for (size_t exp_elem
= 0; exp_elem
< distance
; exp_elem
++)
4757 auto nc_elem
= bounds
.first
+ exp_elem
;
4758 const char *qualified
= index
.symbol_name_at (nc_elem
->idx
);
4759 if (strcmp (qualified
, expected_syms
[exp_elem
]) != 0)
4766 /* Test the lower-level mapped_index::find_name_component_bounds
4770 test_mapped_index_find_name_component_bounds ()
4772 mock_mapped_index
mock_index (test_symbols
);
4774 mock_index
.build_name_components ();
4776 /* Test the lower-level mapped_index::find_name_component_bounds
4777 method in completion mode. */
4779 static const char *expected_syms
[] = {
4784 SELF_CHECK (check_find_bounds_finds (mock_index
,
4785 "t1_func", expected_syms
));
4788 /* Check that the increment-last-char in the name matching algorithm
4789 for completion doesn't get confused with Ansi1 'ÿ' / 0xff. */
4791 static const char *expected_syms1
[] = {
4795 SELF_CHECK (check_find_bounds_finds (mock_index
,
4796 "\377", expected_syms1
));
4798 static const char *expected_syms2
[] = {
4801 SELF_CHECK (check_find_bounds_finds (mock_index
,
4802 "\377\377", expected_syms2
));
4806 /* Test dw2_expand_symtabs_matching_symbol. */
4809 test_dw2_expand_symtabs_matching_symbol ()
4811 mock_mapped_index
mock_index (test_symbols
);
4813 /* We let all tests run until the end even if some fails, for debug
4815 bool any_mismatch
= false;
4817 /* Create the expected symbols list (an initializer_list). Needed
4818 because lists have commas, and we need to pass them to CHECK,
4819 which is a macro. */
4820 #define EXPECT(...) { __VA_ARGS__ }
4822 /* Wrapper for check_match that passes down the current
4823 __FILE__/__LINE__. */
4824 #define CHECK_MATCH(NAME, MATCH_TYPE, COMPLETION_MODE, EXPECTED_LIST) \
4825 any_mismatch |= !check_match (__FILE__, __LINE__, \
4827 NAME, MATCH_TYPE, COMPLETION_MODE, \
4830 /* Identity checks. */
4831 for (const char *sym
: test_symbols
)
4833 /* Should be able to match all existing symbols. */
4834 CHECK_MATCH (sym
, symbol_name_match_type::FULL
, false,
4837 /* Should be able to match all existing symbols with
4839 std::string with_params
= std::string (sym
) + "(int)";
4840 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4843 /* Should be able to match all existing symbols with
4844 parameters and qualifiers. */
4845 with_params
= std::string (sym
) + " ( int ) const";
4846 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4849 /* This should really find sym, but cp-name-parser.y doesn't
4850 know about lvalue/rvalue qualifiers yet. */
4851 with_params
= std::string (sym
) + " ( int ) &&";
4852 CHECK_MATCH (with_params
.c_str (), symbol_name_match_type::FULL
, false,
4856 /* Check that the name matching algorithm for completion doesn't get
4857 confused with Latin1 'ÿ' / 0xff. */
4859 static const char str
[] = "\377";
4860 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4861 EXPECT ("\377", "\377\377123"));
4864 /* Check that the increment-last-char in the matching algorithm for
4865 completion doesn't match "t1_fund" when completing "t1_func". */
4867 static const char str
[] = "t1_func";
4868 CHECK_MATCH (str
, symbol_name_match_type::FULL
, true,
4869 EXPECT ("t1_func", "t1_func1"));
4872 /* Check that completion mode works at each prefix of the expected
4875 static const char str
[] = "function(int)";
4876 size_t len
= strlen (str
);
4879 for (size_t i
= 1; i
< len
; i
++)
4881 lookup
.assign (str
, i
);
4882 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4883 EXPECT ("function"));
4887 /* While "w" is a prefix of both components, the match function
4888 should still only be called once. */
4890 CHECK_MATCH ("w", symbol_name_match_type::FULL
, true,
4892 CHECK_MATCH ("w", symbol_name_match_type::WILD
, true,
4896 /* Same, with a "complicated" symbol. */
4898 static const char str
[] = Z_SYM_NAME
;
4899 size_t len
= strlen (str
);
4902 for (size_t i
= 1; i
< len
; i
++)
4904 lookup
.assign (str
, i
);
4905 CHECK_MATCH (lookup
.c_str (), symbol_name_match_type::FULL
, true,
4906 EXPECT (Z_SYM_NAME
));
4910 /* In FULL mode, an incomplete symbol doesn't match. */
4912 CHECK_MATCH ("std::zfunction(int", symbol_name_match_type::FULL
, false,
4916 /* A complete symbol with parameters matches any overload, since the
4917 index has no overload info. */
4919 CHECK_MATCH ("std::zfunction(int)", symbol_name_match_type::FULL
, true,
4920 EXPECT ("std::zfunction", "std::zfunction2"));
4921 CHECK_MATCH ("zfunction(int)", symbol_name_match_type::WILD
, true,
4922 EXPECT ("std::zfunction", "std::zfunction2"));
4923 CHECK_MATCH ("zfunc", symbol_name_match_type::WILD
, true,
4924 EXPECT ("std::zfunction", "std::zfunction2"));
4927 /* Check that whitespace is ignored appropriately. A symbol with a
4928 template argument list. */
4930 static const char expected
[] = "ns::foo<int>";
4931 CHECK_MATCH ("ns :: foo < int > ", symbol_name_match_type::FULL
, false,
4933 CHECK_MATCH ("foo < int > ", symbol_name_match_type::WILD
, false,
4937 /* Check that whitespace is ignored appropriately. A symbol with a
4938 template argument list that includes a pointer. */
4940 static const char expected
[] = "ns::foo<char*>";
4941 /* Try both completion and non-completion modes. */
4942 static const bool completion_mode
[2] = {false, true};
4943 for (size_t i
= 0; i
< 2; i
++)
4945 CHECK_MATCH ("ns :: foo < char * >", symbol_name_match_type::FULL
,
4946 completion_mode
[i
], EXPECT (expected
));
4947 CHECK_MATCH ("foo < char * >", symbol_name_match_type::WILD
,
4948 completion_mode
[i
], EXPECT (expected
));
4950 CHECK_MATCH ("ns :: foo < char * > (int)", symbol_name_match_type::FULL
,
4951 completion_mode
[i
], EXPECT (expected
));
4952 CHECK_MATCH ("foo < char * > (int)", symbol_name_match_type::WILD
,
4953 completion_mode
[i
], EXPECT (expected
));
4958 /* Check method qualifiers are ignored. */
4959 static const char expected
[] = "ns::foo<char*>";
4960 CHECK_MATCH ("ns :: foo < char * > ( int ) const",
4961 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4962 CHECK_MATCH ("ns :: foo < char * > ( int ) &&",
4963 symbol_name_match_type::FULL
, true, EXPECT (expected
));
4964 CHECK_MATCH ("foo < char * > ( int ) const",
4965 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4966 CHECK_MATCH ("foo < char * > ( int ) &&",
4967 symbol_name_match_type::WILD
, true, EXPECT (expected
));
4970 /* Test lookup names that don't match anything. */
4972 CHECK_MATCH ("bar2", symbol_name_match_type::WILD
, false,
4975 CHECK_MATCH ("doesntexist", symbol_name_match_type::FULL
, false,
4979 /* Some wild matching tests, exercising "(anonymous namespace)",
4980 which should not be confused with a parameter list. */
4982 static const char *syms
[] = {
4986 "A :: B :: C ( int )",
4991 for (const char *s
: syms
)
4993 CHECK_MATCH (s
, symbol_name_match_type::WILD
, false,
4994 EXPECT ("(anonymous namespace)::A::B::C"));
4999 static const char expected
[] = "ns2::tmpl<int>::foo2";
5000 CHECK_MATCH ("tmp", symbol_name_match_type::WILD
, true,
5002 CHECK_MATCH ("tmpl<", symbol_name_match_type::WILD
, true,
5006 SELF_CHECK (!any_mismatch
);
5015 test_mapped_index_find_name_component_bounds ();
5016 test_dw2_expand_symtabs_matching_symbol ();
5019 }} // namespace selftests::dw2_expand_symtabs_matching
5021 #endif /* GDB_SELF_TEST */
5023 /* If FILE_MATCHER is NULL or if PER_CU has
5024 dwarf2_per_cu_quick_data::MARK set (see
5025 dw_expand_symtabs_matching_file_matcher), expand the CU and call
5026 EXPANSION_NOTIFY on it. */
5029 dw2_expand_symtabs_matching_one
5030 (struct dwarf2_per_cu_data
*per_cu
,
5031 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5032 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
)
5034 if (file_matcher
== NULL
|| per_cu
->v
.quick
->mark
)
5036 bool symtab_was_null
5037 = (per_cu
->v
.quick
->compunit_symtab
== NULL
);
5039 dw2_instantiate_symtab (per_cu
, false);
5041 if (expansion_notify
!= NULL
5043 && per_cu
->v
.quick
->compunit_symtab
!= NULL
)
5044 expansion_notify (per_cu
->v
.quick
->compunit_symtab
);
5048 /* Helper for dw2_expand_matching symtabs. Called on each symbol
5049 matched, to expand corresponding CUs that were marked. IDX is the
5050 index of the symbol name that matched. */
5053 dw2_expand_marked_cus
5054 (struct dwarf2_per_objfile
*dwarf2_per_objfile
, offset_type idx
,
5055 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5056 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5059 offset_type
*vec
, vec_len
, vec_idx
;
5060 bool global_seen
= false;
5061 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5063 vec
= (offset_type
*) (index
.constant_pool
5064 + MAYBE_SWAP (index
.symbol_table
[idx
].vec
));
5065 vec_len
= MAYBE_SWAP (vec
[0]);
5066 for (vec_idx
= 0; vec_idx
< vec_len
; ++vec_idx
)
5068 offset_type cu_index_and_attrs
= MAYBE_SWAP (vec
[vec_idx
+ 1]);
5069 /* This value is only valid for index versions >= 7. */
5070 int is_static
= GDB_INDEX_SYMBOL_STATIC_VALUE (cu_index_and_attrs
);
5071 gdb_index_symbol_kind symbol_kind
=
5072 GDB_INDEX_SYMBOL_KIND_VALUE (cu_index_and_attrs
);
5073 int cu_index
= GDB_INDEX_CU_VALUE (cu_index_and_attrs
);
5074 /* Only check the symbol attributes if they're present.
5075 Indices prior to version 7 don't record them,
5076 and indices >= 7 may elide them for certain symbols
5077 (gold does this). */
5080 && symbol_kind
!= GDB_INDEX_SYMBOL_KIND_NONE
);
5082 /* Work around gold/15646. */
5085 if (!is_static
&& global_seen
)
5091 /* Only check the symbol's kind if it has one. */
5096 case VARIABLES_DOMAIN
:
5097 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_VARIABLE
)
5100 case FUNCTIONS_DOMAIN
:
5101 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_FUNCTION
)
5105 if (symbol_kind
!= GDB_INDEX_SYMBOL_KIND_TYPE
)
5113 /* Don't crash on bad data. */
5114 if (cu_index
>= (dwarf2_per_objfile
->all_comp_units
.size ()
5115 + dwarf2_per_objfile
->all_type_units
.size ()))
5117 complaint (_(".gdb_index entry has bad CU index"
5119 objfile_name (dwarf2_per_objfile
->objfile
));
5123 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (cu_index
);
5124 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
5129 /* If FILE_MATCHER is non-NULL, set all the
5130 dwarf2_per_cu_quick_data::MARK of the current DWARF2_PER_OBJFILE
5131 that match FILE_MATCHER. */
5134 dw_expand_symtabs_matching_file_matcher
5135 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5136 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
)
5138 if (file_matcher
== NULL
)
5141 objfile
*const objfile
= dwarf2_per_objfile
->objfile
;
5143 htab_up
visited_found (htab_create_alloc (10, htab_hash_pointer
,
5145 NULL
, xcalloc
, xfree
));
5146 htab_up
visited_not_found (htab_create_alloc (10, htab_hash_pointer
,
5148 NULL
, xcalloc
, xfree
));
5150 /* The rule is CUs specify all the files, including those used by
5151 any TU, so there's no need to scan TUs here. */
5153 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5157 per_cu
->v
.quick
->mark
= 0;
5159 /* We only need to look at symtabs not already expanded. */
5160 if (per_cu
->v
.quick
->compunit_symtab
)
5163 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5164 if (file_data
== NULL
)
5167 if (htab_find (visited_not_found
.get (), file_data
) != NULL
)
5169 else if (htab_find (visited_found
.get (), file_data
) != NULL
)
5171 per_cu
->v
.quick
->mark
= 1;
5175 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5177 const char *this_real_name
;
5179 if (file_matcher (file_data
->file_names
[j
], false))
5181 per_cu
->v
.quick
->mark
= 1;
5185 /* Before we invoke realpath, which can get expensive when many
5186 files are involved, do a quick comparison of the basenames. */
5187 if (!basenames_may_differ
5188 && !file_matcher (lbasename (file_data
->file_names
[j
]),
5192 this_real_name
= dw2_get_real_path (objfile
, file_data
, j
);
5193 if (file_matcher (this_real_name
, false))
5195 per_cu
->v
.quick
->mark
= 1;
5200 void **slot
= htab_find_slot (per_cu
->v
.quick
->mark
5201 ? visited_found
.get ()
5202 : visited_not_found
.get (),
5209 dw2_expand_symtabs_matching
5210 (struct objfile
*objfile
,
5211 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
5212 const lookup_name_info
&lookup_name
,
5213 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
5214 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
5215 enum search_domain kind
)
5217 struct dwarf2_per_objfile
*dwarf2_per_objfile
5218 = get_dwarf2_per_objfile (objfile
);
5220 /* index_table is NULL if OBJF_READNOW. */
5221 if (!dwarf2_per_objfile
->index_table
)
5224 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
5226 mapped_index
&index
= *dwarf2_per_objfile
->index_table
;
5228 dw2_expand_symtabs_matching_symbol (index
, lookup_name
,
5230 kind
, [&] (offset_type idx
)
5232 dw2_expand_marked_cus (dwarf2_per_objfile
, idx
, file_matcher
,
5233 expansion_notify
, kind
);
5237 /* A helper for dw2_find_pc_sect_compunit_symtab which finds the most specific
5240 static struct compunit_symtab
*
5241 recursively_find_pc_sect_compunit_symtab (struct compunit_symtab
*cust
,
5246 if (COMPUNIT_BLOCKVECTOR (cust
) != NULL
5247 && blockvector_contains_pc (COMPUNIT_BLOCKVECTOR (cust
), pc
))
5250 if (cust
->includes
== NULL
)
5253 for (i
= 0; cust
->includes
[i
]; ++i
)
5255 struct compunit_symtab
*s
= cust
->includes
[i
];
5257 s
= recursively_find_pc_sect_compunit_symtab (s
, pc
);
5265 static struct compunit_symtab
*
5266 dw2_find_pc_sect_compunit_symtab (struct objfile
*objfile
,
5267 struct bound_minimal_symbol msymbol
,
5269 struct obj_section
*section
,
5272 struct dwarf2_per_cu_data
*data
;
5273 struct compunit_symtab
*result
;
5275 if (!objfile
->partial_symtabs
->psymtabs_addrmap
)
5278 CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
5279 SECT_OFF_TEXT (objfile
));
5280 data
= (struct dwarf2_per_cu_data
*) addrmap_find
5281 (objfile
->partial_symtabs
->psymtabs_addrmap
, pc
- baseaddr
);
5285 if (warn_if_readin
&& data
->v
.quick
->compunit_symtab
)
5286 warning (_("(Internal error: pc %s in read in CU, but not in symtab.)"),
5287 paddress (get_objfile_arch (objfile
), pc
));
5290 = recursively_find_pc_sect_compunit_symtab (dw2_instantiate_symtab (data
,
5293 gdb_assert (result
!= NULL
);
5298 dw2_map_symbol_filenames (struct objfile
*objfile
, symbol_filename_ftype
*fun
,
5299 void *data
, int need_fullname
)
5301 struct dwarf2_per_objfile
*dwarf2_per_objfile
5302 = get_dwarf2_per_objfile (objfile
);
5304 if (!dwarf2_per_objfile
->filenames_cache
)
5306 dwarf2_per_objfile
->filenames_cache
.emplace ();
5308 htab_up
visited (htab_create_alloc (10,
5309 htab_hash_pointer
, htab_eq_pointer
,
5310 NULL
, xcalloc
, xfree
));
5312 /* The rule is CUs specify all the files, including those used
5313 by any TU, so there's no need to scan TUs here. We can
5314 ignore file names coming from already-expanded CUs. */
5316 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5318 if (per_cu
->v
.quick
->compunit_symtab
)
5320 void **slot
= htab_find_slot (visited
.get (),
5321 per_cu
->v
.quick
->file_names
,
5324 *slot
= per_cu
->v
.quick
->file_names
;
5328 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
5330 /* We only need to look at symtabs not already expanded. */
5331 if (per_cu
->v
.quick
->compunit_symtab
)
5334 quick_file_names
*file_data
= dw2_get_file_names (per_cu
);
5335 if (file_data
== NULL
)
5338 void **slot
= htab_find_slot (visited
.get (), file_data
, INSERT
);
5341 /* Already visited. */
5346 for (int j
= 0; j
< file_data
->num_file_names
; ++j
)
5348 const char *filename
= file_data
->file_names
[j
];
5349 dwarf2_per_objfile
->filenames_cache
->seen (filename
);
5354 dwarf2_per_objfile
->filenames_cache
->traverse ([&] (const char *filename
)
5356 gdb::unique_xmalloc_ptr
<char> this_real_name
;
5359 this_real_name
= gdb_realpath (filename
);
5360 (*fun
) (filename
, this_real_name
.get (), data
);
5365 dw2_has_symbols (struct objfile
*objfile
)
5370 const struct quick_symbol_functions dwarf2_gdb_index_functions
=
5373 dw2_find_last_source_symtab
,
5374 dw2_forget_cached_source_info
,
5375 dw2_map_symtabs_matching_filename
,
5379 dw2_expand_symtabs_for_function
,
5380 dw2_expand_all_symtabs
,
5381 dw2_expand_symtabs_with_fullname
,
5382 dw2_map_matching_symbols
,
5383 dw2_expand_symtabs_matching
,
5384 dw2_find_pc_sect_compunit_symtab
,
5386 dw2_map_symbol_filenames
5389 /* DWARF-5 debug_names reader. */
5391 /* DWARF-5 augmentation string for GDB's DW_IDX_GNU_* extension. */
5392 static const gdb_byte dwarf5_augmentation
[] = { 'G', 'D', 'B', 0 };
5394 /* A helper function that reads the .debug_names section in SECTION
5395 and fills in MAP. FILENAME is the name of the file containing the
5396 section; it is used for error reporting.
5398 Returns true if all went well, false otherwise. */
5401 read_debug_names_from_section (struct objfile
*objfile
,
5402 const char *filename
,
5403 struct dwarf2_section_info
*section
,
5404 mapped_debug_names
&map
)
5406 if (dwarf2_section_empty_p (section
))
5409 /* Older elfutils strip versions could keep the section in the main
5410 executable while splitting it for the separate debug info file. */
5411 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
5414 dwarf2_read_section (objfile
, section
);
5416 map
.dwarf5_byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
5418 const gdb_byte
*addr
= section
->buffer
;
5420 bfd
*const abfd
= get_section_bfd_owner (section
);
5422 unsigned int bytes_read
;
5423 LONGEST length
= read_initial_length (abfd
, addr
, &bytes_read
);
5426 map
.dwarf5_is_dwarf64
= bytes_read
!= 4;
5427 map
.offset_size
= map
.dwarf5_is_dwarf64
? 8 : 4;
5428 if (bytes_read
+ length
!= section
->size
)
5430 /* There may be multiple per-CU indices. */
5431 warning (_("Section .debug_names in %s length %s does not match "
5432 "section length %s, ignoring .debug_names."),
5433 filename
, plongest (bytes_read
+ length
),
5434 pulongest (section
->size
));
5438 /* The version number. */
5439 uint16_t version
= read_2_bytes (abfd
, addr
);
5443 warning (_("Section .debug_names in %s has unsupported version %d, "
5444 "ignoring .debug_names."),
5450 uint16_t padding
= read_2_bytes (abfd
, addr
);
5454 warning (_("Section .debug_names in %s has unsupported padding %d, "
5455 "ignoring .debug_names."),
5460 /* comp_unit_count - The number of CUs in the CU list. */
5461 map
.cu_count
= read_4_bytes (abfd
, addr
);
5464 /* local_type_unit_count - The number of TUs in the local TU
5466 map
.tu_count
= read_4_bytes (abfd
, addr
);
5469 /* foreign_type_unit_count - The number of TUs in the foreign TU
5471 uint32_t foreign_tu_count
= read_4_bytes (abfd
, addr
);
5473 if (foreign_tu_count
!= 0)
5475 warning (_("Section .debug_names in %s has unsupported %lu foreign TUs, "
5476 "ignoring .debug_names."),
5477 filename
, static_cast<unsigned long> (foreign_tu_count
));
5481 /* bucket_count - The number of hash buckets in the hash lookup
5483 map
.bucket_count
= read_4_bytes (abfd
, addr
);
5486 /* name_count - The number of unique names in the index. */
5487 map
.name_count
= read_4_bytes (abfd
, addr
);
5490 /* abbrev_table_size - The size in bytes of the abbreviations
5492 uint32_t abbrev_table_size
= read_4_bytes (abfd
, addr
);
5495 /* augmentation_string_size - The size in bytes of the augmentation
5496 string. This value is rounded up to a multiple of 4. */
5497 uint32_t augmentation_string_size
= read_4_bytes (abfd
, addr
);
5499 map
.augmentation_is_gdb
= ((augmentation_string_size
5500 == sizeof (dwarf5_augmentation
))
5501 && memcmp (addr
, dwarf5_augmentation
,
5502 sizeof (dwarf5_augmentation
)) == 0);
5503 augmentation_string_size
+= (-augmentation_string_size
) & 3;
5504 addr
+= augmentation_string_size
;
5507 map
.cu_table_reordered
= addr
;
5508 addr
+= map
.cu_count
* map
.offset_size
;
5510 /* List of Local TUs */
5511 map
.tu_table_reordered
= addr
;
5512 addr
+= map
.tu_count
* map
.offset_size
;
5514 /* Hash Lookup Table */
5515 map
.bucket_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5516 addr
+= map
.bucket_count
* 4;
5517 map
.hash_table_reordered
= reinterpret_cast<const uint32_t *> (addr
);
5518 addr
+= map
.name_count
* 4;
5521 map
.name_table_string_offs_reordered
= addr
;
5522 addr
+= map
.name_count
* map
.offset_size
;
5523 map
.name_table_entry_offs_reordered
= addr
;
5524 addr
+= map
.name_count
* map
.offset_size
;
5526 const gdb_byte
*abbrev_table_start
= addr
;
5529 const ULONGEST index_num
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5534 const auto insertpair
5535 = map
.abbrev_map
.emplace (index_num
, mapped_debug_names::index_val ());
5536 if (!insertpair
.second
)
5538 warning (_("Section .debug_names in %s has duplicate index %s, "
5539 "ignoring .debug_names."),
5540 filename
, pulongest (index_num
));
5543 mapped_debug_names::index_val
&indexval
= insertpair
.first
->second
;
5544 indexval
.dwarf_tag
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5549 mapped_debug_names::index_val::attr attr
;
5550 attr
.dw_idx
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5552 attr
.form
= read_unsigned_leb128 (abfd
, addr
, &bytes_read
);
5554 if (attr
.form
== DW_FORM_implicit_const
)
5556 attr
.implicit_const
= read_signed_leb128 (abfd
, addr
,
5560 if (attr
.dw_idx
== 0 && attr
.form
== 0)
5562 indexval
.attr_vec
.push_back (std::move (attr
));
5565 if (addr
!= abbrev_table_start
+ abbrev_table_size
)
5567 warning (_("Section .debug_names in %s has abbreviation_table "
5568 "of size %zu vs. written as %u, ignoring .debug_names."),
5569 filename
, addr
- abbrev_table_start
, abbrev_table_size
);
5572 map
.entry_pool
= addr
;
5577 /* A helper for create_cus_from_debug_names that handles the MAP's CU
5581 create_cus_from_debug_names_list (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5582 const mapped_debug_names
&map
,
5583 dwarf2_section_info
§ion
,
5586 sect_offset sect_off_prev
;
5587 for (uint32_t i
= 0; i
<= map
.cu_count
; ++i
)
5589 sect_offset sect_off_next
;
5590 if (i
< map
.cu_count
)
5593 = (sect_offset
) (extract_unsigned_integer
5594 (map
.cu_table_reordered
+ i
* map
.offset_size
,
5596 map
.dwarf5_byte_order
));
5599 sect_off_next
= (sect_offset
) section
.size
;
5602 const ULONGEST length
= sect_off_next
- sect_off_prev
;
5603 dwarf2_per_cu_data
*per_cu
5604 = create_cu_from_index_list (dwarf2_per_objfile
, §ion
, is_dwz
,
5605 sect_off_prev
, length
);
5606 dwarf2_per_objfile
->all_comp_units
.push_back (per_cu
);
5608 sect_off_prev
= sect_off_next
;
5612 /* Read the CU list from the mapped index, and use it to create all
5613 the CU objects for this dwarf2_per_objfile. */
5616 create_cus_from_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
5617 const mapped_debug_names
&map
,
5618 const mapped_debug_names
&dwz_map
)
5620 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
5621 dwarf2_per_objfile
->all_comp_units
.reserve (map
.cu_count
+ dwz_map
.cu_count
);
5623 create_cus_from_debug_names_list (dwarf2_per_objfile
, map
,
5624 dwarf2_per_objfile
->info
,
5625 false /* is_dwz */);
5627 if (dwz_map
.cu_count
== 0)
5630 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5631 create_cus_from_debug_names_list (dwarf2_per_objfile
, dwz_map
, dwz
->info
,
5635 /* Read .debug_names. If everything went ok, initialize the "quick"
5636 elements of all the CUs and return true. Otherwise, return false. */
5639 dwarf2_read_debug_names (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
5641 std::unique_ptr
<mapped_debug_names
> map
5642 (new mapped_debug_names (dwarf2_per_objfile
));
5643 mapped_debug_names
dwz_map (dwarf2_per_objfile
);
5644 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5646 if (!read_debug_names_from_section (objfile
, objfile_name (objfile
),
5647 &dwarf2_per_objfile
->debug_names
,
5651 /* Don't use the index if it's empty. */
5652 if (map
->name_count
== 0)
5655 /* If there is a .dwz file, read it so we can get its CU list as
5657 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
5660 if (!read_debug_names_from_section (objfile
,
5661 bfd_get_filename (dwz
->dwz_bfd
),
5662 &dwz
->debug_names
, dwz_map
))
5664 warning (_("could not read '.debug_names' section from %s; skipping"),
5665 bfd_get_filename (dwz
->dwz_bfd
));
5670 create_cus_from_debug_names (dwarf2_per_objfile
, *map
, dwz_map
);
5672 if (map
->tu_count
!= 0)
5674 /* We can only handle a single .debug_types when we have an
5676 if (VEC_length (dwarf2_section_info_def
, dwarf2_per_objfile
->types
) != 1)
5679 dwarf2_section_info
*section
= VEC_index (dwarf2_section_info_def
,
5680 dwarf2_per_objfile
->types
, 0);
5682 create_signatured_type_table_from_debug_names
5683 (dwarf2_per_objfile
, *map
, section
, &dwarf2_per_objfile
->abbrev
);
5686 create_addrmap_from_aranges (dwarf2_per_objfile
,
5687 &dwarf2_per_objfile
->debug_aranges
);
5689 dwarf2_per_objfile
->debug_names_table
= std::move (map
);
5690 dwarf2_per_objfile
->using_index
= 1;
5691 dwarf2_per_objfile
->quick_file_names_table
=
5692 create_quick_file_names_table (dwarf2_per_objfile
->all_comp_units
.size ());
5697 /* Type used to manage iterating over all CUs looking for a symbol for
5700 class dw2_debug_names_iterator
5703 /* If WANT_SPECIFIC_BLOCK is true, only look for symbols in block
5704 BLOCK_INDEX. Otherwise BLOCK_INDEX is ignored. */
5705 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5706 bool want_specific_block
,
5707 block_enum block_index
, domain_enum domain
,
5709 : m_map (map
), m_want_specific_block (want_specific_block
),
5710 m_block_index (block_index
), m_domain (domain
),
5711 m_addr (find_vec_in_debug_names (map
, name
))
5714 dw2_debug_names_iterator (const mapped_debug_names
&map
,
5715 search_domain search
, uint32_t namei
)
5718 m_addr (find_vec_in_debug_names (map
, namei
))
5721 /* Return the next matching CU or NULL if there are no more. */
5722 dwarf2_per_cu_data
*next ();
5725 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5727 static const gdb_byte
*find_vec_in_debug_names (const mapped_debug_names
&map
,
5730 /* The internalized form of .debug_names. */
5731 const mapped_debug_names
&m_map
;
5733 /* If true, only look for symbols that match BLOCK_INDEX. */
5734 const bool m_want_specific_block
= false;
5736 /* One of GLOBAL_BLOCK or STATIC_BLOCK.
5737 Unused if !WANT_SPECIFIC_BLOCK - FIRST_LOCAL_BLOCK is an invalid
5739 const block_enum m_block_index
= FIRST_LOCAL_BLOCK
;
5741 /* The kind of symbol we're looking for. */
5742 const domain_enum m_domain
= UNDEF_DOMAIN
;
5743 const search_domain m_search
= ALL_DOMAIN
;
5745 /* The list of CUs from the index entry of the symbol, or NULL if
5747 const gdb_byte
*m_addr
;
5751 mapped_debug_names::namei_to_name (uint32_t namei
) const
5753 const ULONGEST namei_string_offs
5754 = extract_unsigned_integer ((name_table_string_offs_reordered
5755 + namei
* offset_size
),
5758 return read_indirect_string_at_offset
5759 (dwarf2_per_objfile
, dwarf2_per_objfile
->objfile
->obfd
, namei_string_offs
);
5762 /* Find a slot in .debug_names for the object named NAME. If NAME is
5763 found, return pointer to its pool data. If NAME cannot be found,
5767 dw2_debug_names_iterator::find_vec_in_debug_names
5768 (const mapped_debug_names
&map
, const char *name
)
5770 int (*cmp
) (const char *, const char *);
5772 if (current_language
->la_language
== language_cplus
5773 || current_language
->la_language
== language_fortran
5774 || current_language
->la_language
== language_d
)
5776 /* NAME is already canonical. Drop any qualifiers as
5777 .debug_names does not contain any. */
5779 if (strchr (name
, '(') != NULL
)
5781 gdb::unique_xmalloc_ptr
<char> without_params
5782 = cp_remove_params (name
);
5784 if (without_params
!= NULL
)
5786 name
= without_params
.get();
5791 cmp
= (case_sensitivity
== case_sensitive_on
? strcmp
: strcasecmp
);
5793 const uint32_t full_hash
= dwarf5_djb_hash (name
);
5795 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5796 (map
.bucket_table_reordered
5797 + (full_hash
% map
.bucket_count
)), 4,
5798 map
.dwarf5_byte_order
);
5802 if (namei
>= map
.name_count
)
5804 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5806 namei
, map
.name_count
,
5807 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5813 const uint32_t namei_full_hash
5814 = extract_unsigned_integer (reinterpret_cast<const gdb_byte
*>
5815 (map
.hash_table_reordered
+ namei
), 4,
5816 map
.dwarf5_byte_order
);
5817 if (full_hash
% map
.bucket_count
!= namei_full_hash
% map
.bucket_count
)
5820 if (full_hash
== namei_full_hash
)
5822 const char *const namei_string
= map
.namei_to_name (namei
);
5824 #if 0 /* An expensive sanity check. */
5825 if (namei_full_hash
!= dwarf5_djb_hash (namei_string
))
5827 complaint (_("Wrong .debug_names hash for string at index %u "
5829 namei
, objfile_name (dwarf2_per_objfile
->objfile
));
5834 if (cmp (namei_string
, name
) == 0)
5836 const ULONGEST namei_entry_offs
5837 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5838 + namei
* map
.offset_size
),
5839 map
.offset_size
, map
.dwarf5_byte_order
);
5840 return map
.entry_pool
+ namei_entry_offs
;
5845 if (namei
>= map
.name_count
)
5851 dw2_debug_names_iterator::find_vec_in_debug_names
5852 (const mapped_debug_names
&map
, uint32_t namei
)
5854 if (namei
>= map
.name_count
)
5856 complaint (_("Wrong .debug_names with name index %u but name_count=%u "
5858 namei
, map
.name_count
,
5859 objfile_name (map
.dwarf2_per_objfile
->objfile
));
5863 const ULONGEST namei_entry_offs
5864 = extract_unsigned_integer ((map
.name_table_entry_offs_reordered
5865 + namei
* map
.offset_size
),
5866 map
.offset_size
, map
.dwarf5_byte_order
);
5867 return map
.entry_pool
+ namei_entry_offs
;
5870 /* See dw2_debug_names_iterator. */
5872 dwarf2_per_cu_data
*
5873 dw2_debug_names_iterator::next ()
5878 struct dwarf2_per_objfile
*dwarf2_per_objfile
= m_map
.dwarf2_per_objfile
;
5879 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
5880 bfd
*const abfd
= objfile
->obfd
;
5884 unsigned int bytes_read
;
5885 const ULONGEST abbrev
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5886 m_addr
+= bytes_read
;
5890 const auto indexval_it
= m_map
.abbrev_map
.find (abbrev
);
5891 if (indexval_it
== m_map
.abbrev_map
.cend ())
5893 complaint (_("Wrong .debug_names undefined abbrev code %s "
5895 pulongest (abbrev
), objfile_name (objfile
));
5898 const mapped_debug_names::index_val
&indexval
= indexval_it
->second
;
5899 bool have_is_static
= false;
5901 dwarf2_per_cu_data
*per_cu
= NULL
;
5902 for (const mapped_debug_names::index_val::attr
&attr
: indexval
.attr_vec
)
5907 case DW_FORM_implicit_const
:
5908 ull
= attr
.implicit_const
;
5910 case DW_FORM_flag_present
:
5914 ull
= read_unsigned_leb128 (abfd
, m_addr
, &bytes_read
);
5915 m_addr
+= bytes_read
;
5918 complaint (_("Unsupported .debug_names form %s [in module %s]"),
5919 dwarf_form_name (attr
.form
),
5920 objfile_name (objfile
));
5923 switch (attr
.dw_idx
)
5925 case DW_IDX_compile_unit
:
5926 /* Don't crash on bad data. */
5927 if (ull
>= dwarf2_per_objfile
->all_comp_units
.size ())
5929 complaint (_(".debug_names entry has bad CU index %s"
5932 objfile_name (dwarf2_per_objfile
->objfile
));
5935 per_cu
= dwarf2_per_objfile
->get_cutu (ull
);
5937 case DW_IDX_type_unit
:
5938 /* Don't crash on bad data. */
5939 if (ull
>= dwarf2_per_objfile
->all_type_units
.size ())
5941 complaint (_(".debug_names entry has bad TU index %s"
5944 objfile_name (dwarf2_per_objfile
->objfile
));
5947 per_cu
= &dwarf2_per_objfile
->get_tu (ull
)->per_cu
;
5949 case DW_IDX_GNU_internal
:
5950 if (!m_map
.augmentation_is_gdb
)
5952 have_is_static
= true;
5955 case DW_IDX_GNU_external
:
5956 if (!m_map
.augmentation_is_gdb
)
5958 have_is_static
= true;
5964 /* Skip if already read in. */
5965 if (per_cu
->v
.quick
->compunit_symtab
)
5968 /* Check static vs global. */
5971 const bool want_static
= m_block_index
!= GLOBAL_BLOCK
;
5972 if (m_want_specific_block
&& want_static
!= is_static
)
5976 /* Match dw2_symtab_iter_next, symbol_kind
5977 and debug_names::psymbol_tag. */
5981 switch (indexval
.dwarf_tag
)
5983 case DW_TAG_variable
:
5984 case DW_TAG_subprogram
:
5985 /* Some types are also in VAR_DOMAIN. */
5986 case DW_TAG_typedef
:
5987 case DW_TAG_structure_type
:
5994 switch (indexval
.dwarf_tag
)
5996 case DW_TAG_typedef
:
5997 case DW_TAG_structure_type
:
6004 switch (indexval
.dwarf_tag
)
6007 case DW_TAG_variable
:
6017 /* Match dw2_expand_symtabs_matching, symbol_kind and
6018 debug_names::psymbol_tag. */
6021 case VARIABLES_DOMAIN
:
6022 switch (indexval
.dwarf_tag
)
6024 case DW_TAG_variable
:
6030 case FUNCTIONS_DOMAIN
:
6031 switch (indexval
.dwarf_tag
)
6033 case DW_TAG_subprogram
:
6040 switch (indexval
.dwarf_tag
)
6042 case DW_TAG_typedef
:
6043 case DW_TAG_structure_type
:
6056 static struct compunit_symtab
*
6057 dw2_debug_names_lookup_symbol (struct objfile
*objfile
, int block_index_int
,
6058 const char *name
, domain_enum domain
)
6060 const block_enum block_index
= static_cast<block_enum
> (block_index_int
);
6061 struct dwarf2_per_objfile
*dwarf2_per_objfile
6062 = get_dwarf2_per_objfile (objfile
);
6064 const auto &mapp
= dwarf2_per_objfile
->debug_names_table
;
6067 /* index is NULL if OBJF_READNOW. */
6070 const auto &map
= *mapp
;
6072 dw2_debug_names_iterator
iter (map
, true /* want_specific_block */,
6073 block_index
, domain
, name
);
6075 struct compunit_symtab
*stab_best
= NULL
;
6076 struct dwarf2_per_cu_data
*per_cu
;
6077 while ((per_cu
= iter
.next ()) != NULL
)
6079 struct symbol
*sym
, *with_opaque
= NULL
;
6080 struct compunit_symtab
*stab
= dw2_instantiate_symtab (per_cu
, false);
6081 const struct blockvector
*bv
= COMPUNIT_BLOCKVECTOR (stab
);
6082 const struct block
*block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
6084 sym
= block_find_symbol (block
, name
, domain
,
6085 block_find_non_opaque_type_preferred
,
6088 /* Some caution must be observed with overloaded functions and
6089 methods, since the index will not contain any overload
6090 information (but NAME might contain it). */
6093 && strcmp_iw (SYMBOL_SEARCH_NAME (sym
), name
) == 0)
6095 if (with_opaque
!= NULL
6096 && strcmp_iw (SYMBOL_SEARCH_NAME (with_opaque
), name
) == 0)
6099 /* Keep looking through other CUs. */
6105 /* This dumps minimal information about .debug_names. It is called
6106 via "mt print objfiles". The gdb.dwarf2/gdb-index.exp testcase
6107 uses this to verify that .debug_names has been loaded. */
6110 dw2_debug_names_dump (struct objfile
*objfile
)
6112 struct dwarf2_per_objfile
*dwarf2_per_objfile
6113 = get_dwarf2_per_objfile (objfile
);
6115 gdb_assert (dwarf2_per_objfile
->using_index
);
6116 printf_filtered (".debug_names:");
6117 if (dwarf2_per_objfile
->debug_names_table
)
6118 printf_filtered (" exists\n");
6120 printf_filtered (" faked for \"readnow\"\n");
6121 printf_filtered ("\n");
6125 dw2_debug_names_expand_symtabs_for_function (struct objfile
*objfile
,
6126 const char *func_name
)
6128 struct dwarf2_per_objfile
*dwarf2_per_objfile
6129 = get_dwarf2_per_objfile (objfile
);
6131 /* dwarf2_per_objfile->debug_names_table is NULL if OBJF_READNOW. */
6132 if (dwarf2_per_objfile
->debug_names_table
)
6134 const mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6136 /* Note: It doesn't matter what we pass for block_index here. */
6137 dw2_debug_names_iterator
iter (map
, false /* want_specific_block */,
6138 GLOBAL_BLOCK
, VAR_DOMAIN
, func_name
);
6140 struct dwarf2_per_cu_data
*per_cu
;
6141 while ((per_cu
= iter
.next ()) != NULL
)
6142 dw2_instantiate_symtab (per_cu
, false);
6147 dw2_debug_names_expand_symtabs_matching
6148 (struct objfile
*objfile
,
6149 gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
6150 const lookup_name_info
&lookup_name
,
6151 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
6152 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
6153 enum search_domain kind
)
6155 struct dwarf2_per_objfile
*dwarf2_per_objfile
6156 = get_dwarf2_per_objfile (objfile
);
6158 /* debug_names_table is NULL if OBJF_READNOW. */
6159 if (!dwarf2_per_objfile
->debug_names_table
)
6162 dw_expand_symtabs_matching_file_matcher (dwarf2_per_objfile
, file_matcher
);
6164 mapped_debug_names
&map
= *dwarf2_per_objfile
->debug_names_table
;
6166 dw2_expand_symtabs_matching_symbol (map
, lookup_name
,
6168 kind
, [&] (offset_type namei
)
6170 /* The name was matched, now expand corresponding CUs that were
6172 dw2_debug_names_iterator
iter (map
, kind
, namei
);
6174 struct dwarf2_per_cu_data
*per_cu
;
6175 while ((per_cu
= iter
.next ()) != NULL
)
6176 dw2_expand_symtabs_matching_one (per_cu
, file_matcher
,
6181 const struct quick_symbol_functions dwarf2_debug_names_functions
=
6184 dw2_find_last_source_symtab
,
6185 dw2_forget_cached_source_info
,
6186 dw2_map_symtabs_matching_filename
,
6187 dw2_debug_names_lookup_symbol
,
6189 dw2_debug_names_dump
,
6190 dw2_debug_names_expand_symtabs_for_function
,
6191 dw2_expand_all_symtabs
,
6192 dw2_expand_symtabs_with_fullname
,
6193 dw2_map_matching_symbols
,
6194 dw2_debug_names_expand_symtabs_matching
,
6195 dw2_find_pc_sect_compunit_symtab
,
6197 dw2_map_symbol_filenames
6200 /* Get the content of the .gdb_index section of OBJ. SECTION_OWNER should point
6201 to either a dwarf2_per_objfile or dwz_file object. */
6203 template <typename T
>
6204 static gdb::array_view
<const gdb_byte
>
6205 get_gdb_index_contents_from_section (objfile
*obj
, T
*section_owner
)
6207 dwarf2_section_info
*section
= §ion_owner
->gdb_index
;
6209 if (dwarf2_section_empty_p (section
))
6212 /* Older elfutils strip versions could keep the section in the main
6213 executable while splitting it for the separate debug info file. */
6214 if ((get_section_flags (section
) & SEC_HAS_CONTENTS
) == 0)
6217 dwarf2_read_section (obj
, section
);
6219 /* dwarf2_section_info::size is a bfd_size_type, while
6220 gdb::array_view works with size_t. On 32-bit hosts, with
6221 --enable-64-bit-bfd, bfd_size_type is a 64-bit type, while size_t
6222 is 32-bit. So we need an explicit narrowing conversion here.
6223 This is fine, because it's impossible to allocate or mmap an
6224 array/buffer larger than what size_t can represent. */
6225 return gdb::make_array_view (section
->buffer
, section
->size
);
6228 /* Lookup the index cache for the contents of the index associated to
6231 static gdb::array_view
<const gdb_byte
>
6232 get_gdb_index_contents_from_cache (objfile
*obj
, dwarf2_per_objfile
*dwarf2_obj
)
6234 const bfd_build_id
*build_id
= build_id_bfd_get (obj
->obfd
);
6235 if (build_id
== nullptr)
6238 return global_index_cache
.lookup_gdb_index (build_id
,
6239 &dwarf2_obj
->index_cache_res
);
6242 /* Same as the above, but for DWZ. */
6244 static gdb::array_view
<const gdb_byte
>
6245 get_gdb_index_contents_from_cache_dwz (objfile
*obj
, dwz_file
*dwz
)
6247 const bfd_build_id
*build_id
= build_id_bfd_get (dwz
->dwz_bfd
.get ());
6248 if (build_id
== nullptr)
6251 return global_index_cache
.lookup_gdb_index (build_id
, &dwz
->index_cache_res
);
6254 /* See symfile.h. */
6257 dwarf2_initialize_objfile (struct objfile
*objfile
, dw_index_kind
*index_kind
)
6259 struct dwarf2_per_objfile
*dwarf2_per_objfile
6260 = get_dwarf2_per_objfile (objfile
);
6262 /* If we're about to read full symbols, don't bother with the
6263 indices. In this case we also don't care if some other debug
6264 format is making psymtabs, because they are all about to be
6266 if ((objfile
->flags
& OBJF_READNOW
))
6268 dwarf2_per_objfile
->using_index
= 1;
6269 create_all_comp_units (dwarf2_per_objfile
);
6270 create_all_type_units (dwarf2_per_objfile
);
6271 dwarf2_per_objfile
->quick_file_names_table
6272 = create_quick_file_names_table
6273 (dwarf2_per_objfile
->all_comp_units
.size ());
6275 for (int i
= 0; i
< (dwarf2_per_objfile
->all_comp_units
.size ()
6276 + dwarf2_per_objfile
->all_type_units
.size ()); ++i
)
6278 dwarf2_per_cu_data
*per_cu
= dwarf2_per_objfile
->get_cutu (i
);
6280 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6281 struct dwarf2_per_cu_quick_data
);
6284 /* Return 1 so that gdb sees the "quick" functions. However,
6285 these functions will be no-ops because we will have expanded
6287 *index_kind
= dw_index_kind::GDB_INDEX
;
6291 if (dwarf2_read_debug_names (dwarf2_per_objfile
))
6293 *index_kind
= dw_index_kind::DEBUG_NAMES
;
6297 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
6298 get_gdb_index_contents_from_section
<struct dwarf2_per_objfile
>,
6299 get_gdb_index_contents_from_section
<dwz_file
>))
6301 *index_kind
= dw_index_kind::GDB_INDEX
;
6305 /* ... otherwise, try to find the index in the index cache. */
6306 if (dwarf2_read_gdb_index (dwarf2_per_objfile
,
6307 get_gdb_index_contents_from_cache
,
6308 get_gdb_index_contents_from_cache_dwz
))
6310 global_index_cache
.hit ();
6311 *index_kind
= dw_index_kind::GDB_INDEX
;
6315 global_index_cache
.miss ();
6321 /* Build a partial symbol table. */
6324 dwarf2_build_psymtabs (struct objfile
*objfile
)
6326 struct dwarf2_per_objfile
*dwarf2_per_objfile
6327 = get_dwarf2_per_objfile (objfile
);
6329 init_psymbol_list (objfile
, 1024);
6333 /* This isn't really ideal: all the data we allocate on the
6334 objfile's obstack is still uselessly kept around. However,
6335 freeing it seems unsafe. */
6336 psymtab_discarder
psymtabs (objfile
);
6337 dwarf2_build_psymtabs_hard (dwarf2_per_objfile
);
6340 /* (maybe) store an index in the cache. */
6341 global_index_cache
.store (dwarf2_per_objfile
);
6343 catch (const gdb_exception_error
&except
)
6345 exception_print (gdb_stderr
, except
);
6349 /* Return the total length of the CU described by HEADER. */
6352 get_cu_length (const struct comp_unit_head
*header
)
6354 return header
->initial_length_size
+ header
->length
;
6357 /* Return TRUE if SECT_OFF is within CU_HEADER. */
6360 offset_in_cu_p (const comp_unit_head
*cu_header
, sect_offset sect_off
)
6362 sect_offset bottom
= cu_header
->sect_off
;
6363 sect_offset top
= cu_header
->sect_off
+ get_cu_length (cu_header
);
6365 return sect_off
>= bottom
&& sect_off
< top
;
6368 /* Find the base address of the compilation unit for range lists and
6369 location lists. It will normally be specified by DW_AT_low_pc.
6370 In DWARF-3 draft 4, the base address could be overridden by
6371 DW_AT_entry_pc. It's been removed, but GCC still uses this for
6372 compilation units with discontinuous ranges. */
6375 dwarf2_find_base_address (struct die_info
*die
, struct dwarf2_cu
*cu
)
6377 struct attribute
*attr
;
6380 cu
->base_address
= 0;
6382 attr
= dwarf2_attr (die
, DW_AT_entry_pc
, cu
);
6385 cu
->base_address
= attr_value_as_address (attr
);
6390 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
6393 cu
->base_address
= attr_value_as_address (attr
);
6399 /* Read in the comp unit header information from the debug_info at info_ptr.
6400 Use rcuh_kind::COMPILE as the default type if not known by the caller.
6401 NOTE: This leaves members offset, first_die_offset to be filled in
6404 static const gdb_byte
*
6405 read_comp_unit_head (struct comp_unit_head
*cu_header
,
6406 const gdb_byte
*info_ptr
,
6407 struct dwarf2_section_info
*section
,
6408 rcuh_kind section_kind
)
6411 unsigned int bytes_read
;
6412 const char *filename
= get_section_file_name (section
);
6413 bfd
*abfd
= get_section_bfd_owner (section
);
6415 cu_header
->length
= read_initial_length (abfd
, info_ptr
, &bytes_read
);
6416 cu_header
->initial_length_size
= bytes_read
;
6417 cu_header
->offset_size
= (bytes_read
== 4) ? 4 : 8;
6418 info_ptr
+= bytes_read
;
6419 cu_header
->version
= read_2_bytes (abfd
, info_ptr
);
6420 if (cu_header
->version
< 2 || cu_header
->version
> 5)
6421 error (_("Dwarf Error: wrong version in compilation unit header "
6422 "(is %d, should be 2, 3, 4 or 5) [in module %s]"),
6423 cu_header
->version
, filename
);
6425 if (cu_header
->version
< 5)
6426 switch (section_kind
)
6428 case rcuh_kind::COMPILE
:
6429 cu_header
->unit_type
= DW_UT_compile
;
6431 case rcuh_kind::TYPE
:
6432 cu_header
->unit_type
= DW_UT_type
;
6435 internal_error (__FILE__
, __LINE__
,
6436 _("read_comp_unit_head: invalid section_kind"));
6440 cu_header
->unit_type
= static_cast<enum dwarf_unit_type
>
6441 (read_1_byte (abfd
, info_ptr
));
6443 switch (cu_header
->unit_type
)
6446 if (section_kind
!= rcuh_kind::COMPILE
)
6447 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6448 "(is DW_UT_compile, should be DW_UT_type) [in module %s]"),
6452 section_kind
= rcuh_kind::TYPE
;
6455 error (_("Dwarf Error: wrong unit_type in compilation unit header "
6456 "(is %d, should be %d or %d) [in module %s]"),
6457 cu_header
->unit_type
, DW_UT_compile
, DW_UT_type
, filename
);
6460 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6463 cu_header
->abbrev_sect_off
= (sect_offset
) read_offset (abfd
, info_ptr
,
6466 info_ptr
+= bytes_read
;
6467 if (cu_header
->version
< 5)
6469 cu_header
->addr_size
= read_1_byte (abfd
, info_ptr
);
6472 signed_addr
= bfd_get_sign_extend_vma (abfd
);
6473 if (signed_addr
< 0)
6474 internal_error (__FILE__
, __LINE__
,
6475 _("read_comp_unit_head: dwarf from non elf file"));
6476 cu_header
->signed_addr_p
= signed_addr
;
6478 if (section_kind
== rcuh_kind::TYPE
)
6480 LONGEST type_offset
;
6482 cu_header
->signature
= read_8_bytes (abfd
, info_ptr
);
6485 type_offset
= read_offset (abfd
, info_ptr
, cu_header
, &bytes_read
);
6486 info_ptr
+= bytes_read
;
6487 cu_header
->type_cu_offset_in_tu
= (cu_offset
) type_offset
;
6488 if (to_underlying (cu_header
->type_cu_offset_in_tu
) != type_offset
)
6489 error (_("Dwarf Error: Too big type_offset in compilation unit "
6490 "header (is %s) [in module %s]"), plongest (type_offset
),
6497 /* Helper function that returns the proper abbrev section for
6500 static struct dwarf2_section_info
*
6501 get_abbrev_section_for_cu (struct dwarf2_per_cu_data
*this_cu
)
6503 struct dwarf2_section_info
*abbrev
;
6504 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
6506 if (this_cu
->is_dwz
)
6507 abbrev
= &dwarf2_get_dwz_file (dwarf2_per_objfile
)->abbrev
;
6509 abbrev
= &dwarf2_per_objfile
->abbrev
;
6514 /* Subroutine of read_and_check_comp_unit_head and
6515 read_and_check_type_unit_head to simplify them.
6516 Perform various error checking on the header. */
6519 error_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6520 struct comp_unit_head
*header
,
6521 struct dwarf2_section_info
*section
,
6522 struct dwarf2_section_info
*abbrev_section
)
6524 const char *filename
= get_section_file_name (section
);
6526 if (to_underlying (header
->abbrev_sect_off
)
6527 >= dwarf2_section_size (dwarf2_per_objfile
->objfile
, abbrev_section
))
6528 error (_("Dwarf Error: bad offset (%s) in compilation unit header "
6529 "(offset %s + 6) [in module %s]"),
6530 sect_offset_str (header
->abbrev_sect_off
),
6531 sect_offset_str (header
->sect_off
),
6534 /* Cast to ULONGEST to use 64-bit arithmetic when possible to
6535 avoid potential 32-bit overflow. */
6536 if (((ULONGEST
) header
->sect_off
+ get_cu_length (header
))
6538 error (_("Dwarf Error: bad length (0x%x) in compilation unit header "
6539 "(offset %s + 0) [in module %s]"),
6540 header
->length
, sect_offset_str (header
->sect_off
),
6544 /* Read in a CU/TU header and perform some basic error checking.
6545 The contents of the header are stored in HEADER.
6546 The result is a pointer to the start of the first DIE. */
6548 static const gdb_byte
*
6549 read_and_check_comp_unit_head (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6550 struct comp_unit_head
*header
,
6551 struct dwarf2_section_info
*section
,
6552 struct dwarf2_section_info
*abbrev_section
,
6553 const gdb_byte
*info_ptr
,
6554 rcuh_kind section_kind
)
6556 const gdb_byte
*beg_of_comp_unit
= info_ptr
;
6558 header
->sect_off
= (sect_offset
) (beg_of_comp_unit
- section
->buffer
);
6560 info_ptr
= read_comp_unit_head (header
, info_ptr
, section
, section_kind
);
6562 header
->first_die_cu_offset
= (cu_offset
) (info_ptr
- beg_of_comp_unit
);
6564 error_check_comp_unit_head (dwarf2_per_objfile
, header
, section
,
6570 /* Fetch the abbreviation table offset from a comp or type unit header. */
6573 read_abbrev_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6574 struct dwarf2_section_info
*section
,
6575 sect_offset sect_off
)
6577 bfd
*abfd
= get_section_bfd_owner (section
);
6578 const gdb_byte
*info_ptr
;
6579 unsigned int initial_length_size
, offset_size
;
6582 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
6583 info_ptr
= section
->buffer
+ to_underlying (sect_off
);
6584 read_initial_length (abfd
, info_ptr
, &initial_length_size
);
6585 offset_size
= initial_length_size
== 4 ? 4 : 8;
6586 info_ptr
+= initial_length_size
;
6588 version
= read_2_bytes (abfd
, info_ptr
);
6592 /* Skip unit type and address size. */
6596 return (sect_offset
) read_offset_1 (abfd
, info_ptr
, offset_size
);
6599 /* Allocate a new partial symtab for file named NAME and mark this new
6600 partial symtab as being an include of PST. */
6603 dwarf2_create_include_psymtab (const char *name
, struct partial_symtab
*pst
,
6604 struct objfile
*objfile
)
6606 struct partial_symtab
*subpst
= allocate_psymtab (name
, objfile
);
6608 if (!IS_ABSOLUTE_PATH (subpst
->filename
))
6610 /* It shares objfile->objfile_obstack. */
6611 subpst
->dirname
= pst
->dirname
;
6614 subpst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (1);
6615 subpst
->dependencies
[0] = pst
;
6616 subpst
->number_of_dependencies
= 1;
6618 subpst
->read_symtab
= pst
->read_symtab
;
6620 /* No private part is necessary for include psymtabs. This property
6621 can be used to differentiate between such include psymtabs and
6622 the regular ones. */
6623 subpst
->read_symtab_private
= NULL
;
6626 /* Read the Line Number Program data and extract the list of files
6627 included by the source file represented by PST. Build an include
6628 partial symtab for each of these included files. */
6631 dwarf2_build_include_psymtabs (struct dwarf2_cu
*cu
,
6632 struct die_info
*die
,
6633 struct partial_symtab
*pst
)
6636 struct attribute
*attr
;
6638 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
6640 lh
= dwarf_decode_line_header ((sect_offset
) DW_UNSND (attr
), cu
);
6642 return; /* No linetable, so no includes. */
6644 /* NOTE: pst->dirname is DW_AT_comp_dir (if present). Also note
6645 that we pass in the raw text_low here; that is ok because we're
6646 only decoding the line table to make include partial symtabs, and
6647 so the addresses aren't really used. */
6648 dwarf_decode_lines (lh
.get (), pst
->dirname
, cu
, pst
,
6649 pst
->raw_text_low (), 1);
6653 hash_signatured_type (const void *item
)
6655 const struct signatured_type
*sig_type
6656 = (const struct signatured_type
*) item
;
6658 /* This drops the top 32 bits of the signature, but is ok for a hash. */
6659 return sig_type
->signature
;
6663 eq_signatured_type (const void *item_lhs
, const void *item_rhs
)
6665 const struct signatured_type
*lhs
= (const struct signatured_type
*) item_lhs
;
6666 const struct signatured_type
*rhs
= (const struct signatured_type
*) item_rhs
;
6668 return lhs
->signature
== rhs
->signature
;
6671 /* Allocate a hash table for signatured types. */
6674 allocate_signatured_type_table (struct objfile
*objfile
)
6676 return htab_create_alloc_ex (41,
6677 hash_signatured_type
,
6680 &objfile
->objfile_obstack
,
6681 hashtab_obstack_allocate
,
6682 dummy_obstack_deallocate
);
6685 /* A helper function to add a signatured type CU to a table. */
6688 add_signatured_type_cu_to_table (void **slot
, void *datum
)
6690 struct signatured_type
*sigt
= (struct signatured_type
*) *slot
;
6691 std::vector
<signatured_type
*> *all_type_units
6692 = (std::vector
<signatured_type
*> *) datum
;
6694 all_type_units
->push_back (sigt
);
6699 /* A helper for create_debug_types_hash_table. Read types from SECTION
6700 and fill them into TYPES_HTAB. It will process only type units,
6701 therefore DW_UT_type. */
6704 create_debug_type_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6705 struct dwo_file
*dwo_file
,
6706 dwarf2_section_info
*section
, htab_t
&types_htab
,
6707 rcuh_kind section_kind
)
6709 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6710 struct dwarf2_section_info
*abbrev_section
;
6712 const gdb_byte
*info_ptr
, *end_ptr
;
6714 abbrev_section
= (dwo_file
!= NULL
6715 ? &dwo_file
->sections
.abbrev
6716 : &dwarf2_per_objfile
->abbrev
);
6718 if (dwarf_read_debug
)
6719 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
6720 get_section_name (section
),
6721 get_section_file_name (abbrev_section
));
6723 dwarf2_read_section (objfile
, section
);
6724 info_ptr
= section
->buffer
;
6726 if (info_ptr
== NULL
)
6729 /* We can't set abfd until now because the section may be empty or
6730 not present, in which case the bfd is unknown. */
6731 abfd
= get_section_bfd_owner (section
);
6733 /* We don't use init_cutu_and_read_dies_simple, or some such, here
6734 because we don't need to read any dies: the signature is in the
6737 end_ptr
= info_ptr
+ section
->size
;
6738 while (info_ptr
< end_ptr
)
6740 struct signatured_type
*sig_type
;
6741 struct dwo_unit
*dwo_tu
;
6743 const gdb_byte
*ptr
= info_ptr
;
6744 struct comp_unit_head header
;
6745 unsigned int length
;
6747 sect_offset sect_off
= (sect_offset
) (ptr
- section
->buffer
);
6749 /* Initialize it due to a false compiler warning. */
6750 header
.signature
= -1;
6751 header
.type_cu_offset_in_tu
= (cu_offset
) -1;
6753 /* We need to read the type's signature in order to build the hash
6754 table, but we don't need anything else just yet. */
6756 ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
, &header
, section
,
6757 abbrev_section
, ptr
, section_kind
);
6759 length
= get_cu_length (&header
);
6761 /* Skip dummy type units. */
6762 if (ptr
>= info_ptr
+ length
6763 || peek_abbrev_code (abfd
, ptr
) == 0
6764 || header
.unit_type
!= DW_UT_type
)
6770 if (types_htab
== NULL
)
6773 types_htab
= allocate_dwo_unit_table (objfile
);
6775 types_htab
= allocate_signatured_type_table (objfile
);
6781 dwo_tu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6783 dwo_tu
->dwo_file
= dwo_file
;
6784 dwo_tu
->signature
= header
.signature
;
6785 dwo_tu
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6786 dwo_tu
->section
= section
;
6787 dwo_tu
->sect_off
= sect_off
;
6788 dwo_tu
->length
= length
;
6792 /* N.B.: type_offset is not usable if this type uses a DWO file.
6793 The real type_offset is in the DWO file. */
6795 sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6796 struct signatured_type
);
6797 sig_type
->signature
= header
.signature
;
6798 sig_type
->type_offset_in_tu
= header
.type_cu_offset_in_tu
;
6799 sig_type
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6800 sig_type
->per_cu
.is_debug_types
= 1;
6801 sig_type
->per_cu
.section
= section
;
6802 sig_type
->per_cu
.sect_off
= sect_off
;
6803 sig_type
->per_cu
.length
= length
;
6806 slot
= htab_find_slot (types_htab
,
6807 dwo_file
? (void*) dwo_tu
: (void *) sig_type
,
6809 gdb_assert (slot
!= NULL
);
6812 sect_offset dup_sect_off
;
6816 const struct dwo_unit
*dup_tu
6817 = (const struct dwo_unit
*) *slot
;
6819 dup_sect_off
= dup_tu
->sect_off
;
6823 const struct signatured_type
*dup_tu
6824 = (const struct signatured_type
*) *slot
;
6826 dup_sect_off
= dup_tu
->per_cu
.sect_off
;
6829 complaint (_("debug type entry at offset %s is duplicate to"
6830 " the entry at offset %s, signature %s"),
6831 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
6832 hex_string (header
.signature
));
6834 *slot
= dwo_file
? (void *) dwo_tu
: (void *) sig_type
;
6836 if (dwarf_read_debug
> 1)
6837 fprintf_unfiltered (gdb_stdlog
, " offset %s, signature %s\n",
6838 sect_offset_str (sect_off
),
6839 hex_string (header
.signature
));
6845 /* Create the hash table of all entries in the .debug_types
6846 (or .debug_types.dwo) section(s).
6847 If reading a DWO file, then DWO_FILE is a pointer to the DWO file object,
6848 otherwise it is NULL.
6850 The result is a pointer to the hash table or NULL if there are no types.
6852 Note: This function processes DWO files only, not DWP files. */
6855 create_debug_types_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6856 struct dwo_file
*dwo_file
,
6857 VEC (dwarf2_section_info_def
) *types
,
6861 struct dwarf2_section_info
*section
;
6863 if (VEC_empty (dwarf2_section_info_def
, types
))
6867 VEC_iterate (dwarf2_section_info_def
, types
, ix
, section
);
6869 create_debug_type_hash_table (dwarf2_per_objfile
, dwo_file
, section
,
6870 types_htab
, rcuh_kind::TYPE
);
6873 /* Create the hash table of all entries in the .debug_types section,
6874 and initialize all_type_units.
6875 The result is zero if there is an error (e.g. missing .debug_types section),
6876 otherwise non-zero. */
6879 create_all_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
6881 htab_t types_htab
= NULL
;
6883 create_debug_type_hash_table (dwarf2_per_objfile
, NULL
,
6884 &dwarf2_per_objfile
->info
, types_htab
,
6885 rcuh_kind::COMPILE
);
6886 create_debug_types_hash_table (dwarf2_per_objfile
, NULL
,
6887 dwarf2_per_objfile
->types
, types_htab
);
6888 if (types_htab
== NULL
)
6890 dwarf2_per_objfile
->signatured_types
= NULL
;
6894 dwarf2_per_objfile
->signatured_types
= types_htab
;
6896 gdb_assert (dwarf2_per_objfile
->all_type_units
.empty ());
6897 dwarf2_per_objfile
->all_type_units
.reserve (htab_elements (types_htab
));
6899 htab_traverse_noresize (types_htab
, add_signatured_type_cu_to_table
,
6900 &dwarf2_per_objfile
->all_type_units
);
6905 /* Add an entry for signature SIG to dwarf2_per_objfile->signatured_types.
6906 If SLOT is non-NULL, it is the entry to use in the hash table.
6907 Otherwise we find one. */
6909 static struct signatured_type
*
6910 add_type_unit (struct dwarf2_per_objfile
*dwarf2_per_objfile
, ULONGEST sig
,
6913 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6915 if (dwarf2_per_objfile
->all_type_units
.size ()
6916 == dwarf2_per_objfile
->all_type_units
.capacity ())
6917 ++dwarf2_per_objfile
->tu_stats
.nr_all_type_units_reallocs
;
6919 signatured_type
*sig_type
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6920 struct signatured_type
);
6922 dwarf2_per_objfile
->all_type_units
.push_back (sig_type
);
6923 sig_type
->signature
= sig
;
6924 sig_type
->per_cu
.is_debug_types
= 1;
6925 if (dwarf2_per_objfile
->using_index
)
6927 sig_type
->per_cu
.v
.quick
=
6928 OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
6929 struct dwarf2_per_cu_quick_data
);
6934 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
6937 gdb_assert (*slot
== NULL
);
6939 /* The rest of sig_type must be filled in by the caller. */
6943 /* Subroutine of lookup_dwo_signatured_type and lookup_dwp_signatured_type.
6944 Fill in SIG_ENTRY with DWO_ENTRY. */
6947 fill_in_sig_entry_from_dwo_entry (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
6948 struct signatured_type
*sig_entry
,
6949 struct dwo_unit
*dwo_entry
)
6951 /* Make sure we're not clobbering something we don't expect to. */
6952 gdb_assert (! sig_entry
->per_cu
.queued
);
6953 gdb_assert (sig_entry
->per_cu
.cu
== NULL
);
6954 if (dwarf2_per_objfile
->using_index
)
6956 gdb_assert (sig_entry
->per_cu
.v
.quick
!= NULL
);
6957 gdb_assert (sig_entry
->per_cu
.v
.quick
->compunit_symtab
== NULL
);
6960 gdb_assert (sig_entry
->per_cu
.v
.psymtab
== NULL
);
6961 gdb_assert (sig_entry
->signature
== dwo_entry
->signature
);
6962 gdb_assert (to_underlying (sig_entry
->type_offset_in_section
) == 0);
6963 gdb_assert (sig_entry
->type_unit_group
== NULL
);
6964 gdb_assert (sig_entry
->dwo_unit
== NULL
);
6966 sig_entry
->per_cu
.section
= dwo_entry
->section
;
6967 sig_entry
->per_cu
.sect_off
= dwo_entry
->sect_off
;
6968 sig_entry
->per_cu
.length
= dwo_entry
->length
;
6969 sig_entry
->per_cu
.reading_dwo_directly
= 1;
6970 sig_entry
->per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
6971 sig_entry
->type_offset_in_tu
= dwo_entry
->type_offset_in_tu
;
6972 sig_entry
->dwo_unit
= dwo_entry
;
6975 /* Subroutine of lookup_signatured_type.
6976 If we haven't read the TU yet, create the signatured_type data structure
6977 for a TU to be read in directly from a DWO file, bypassing the stub.
6978 This is the "Stay in DWO Optimization": When there is no DWP file and we're
6979 using .gdb_index, then when reading a CU we want to stay in the DWO file
6980 containing that CU. Otherwise we could end up reading several other DWO
6981 files (due to comdat folding) to process the transitive closure of all the
6982 mentioned TUs, and that can be slow. The current DWO file will have every
6983 type signature that it needs.
6984 We only do this for .gdb_index because in the psymtab case we already have
6985 to read all the DWOs to build the type unit groups. */
6987 static struct signatured_type
*
6988 lookup_dwo_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
6990 struct dwarf2_per_objfile
*dwarf2_per_objfile
6991 = cu
->per_cu
->dwarf2_per_objfile
;
6992 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
6993 struct dwo_file
*dwo_file
;
6994 struct dwo_unit find_dwo_entry
, *dwo_entry
;
6995 struct signatured_type find_sig_entry
, *sig_entry
;
6998 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
7000 /* If TU skeletons have been removed then we may not have read in any
7002 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7004 dwarf2_per_objfile
->signatured_types
7005 = allocate_signatured_type_table (objfile
);
7008 /* We only ever need to read in one copy of a signatured type.
7009 Use the global signatured_types array to do our own comdat-folding
7010 of types. If this is the first time we're reading this TU, and
7011 the TU has an entry in .gdb_index, replace the recorded data from
7012 .gdb_index with this TU. */
7014 find_sig_entry
.signature
= sig
;
7015 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
7016 &find_sig_entry
, INSERT
);
7017 sig_entry
= (struct signatured_type
*) *slot
;
7019 /* We can get here with the TU already read, *or* in the process of being
7020 read. Don't reassign the global entry to point to this DWO if that's
7021 the case. Also note that if the TU is already being read, it may not
7022 have come from a DWO, the program may be a mix of Fission-compiled
7023 code and non-Fission-compiled code. */
7025 /* Have we already tried to read this TU?
7026 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
7027 needn't exist in the global table yet). */
7028 if (sig_entry
!= NULL
&& sig_entry
->per_cu
.tu_read
)
7031 /* Note: cu->dwo_unit is the dwo_unit that references this TU, not the
7032 dwo_unit of the TU itself. */
7033 dwo_file
= cu
->dwo_unit
->dwo_file
;
7035 /* Ok, this is the first time we're reading this TU. */
7036 if (dwo_file
->tus
== NULL
)
7038 find_dwo_entry
.signature
= sig
;
7039 dwo_entry
= (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_entry
);
7040 if (dwo_entry
== NULL
)
7043 /* If the global table doesn't have an entry for this TU, add one. */
7044 if (sig_entry
== NULL
)
7045 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
7047 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7048 sig_entry
->per_cu
.tu_read
= 1;
7052 /* Subroutine of lookup_signatured_type.
7053 Look up the type for signature SIG, and if we can't find SIG in .gdb_index
7054 then try the DWP file. If the TU stub (skeleton) has been removed then
7055 it won't be in .gdb_index. */
7057 static struct signatured_type
*
7058 lookup_dwp_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7060 struct dwarf2_per_objfile
*dwarf2_per_objfile
7061 = cu
->per_cu
->dwarf2_per_objfile
;
7062 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7063 struct dwp_file
*dwp_file
= get_dwp_file (dwarf2_per_objfile
);
7064 struct dwo_unit
*dwo_entry
;
7065 struct signatured_type find_sig_entry
, *sig_entry
;
7068 gdb_assert (cu
->dwo_unit
&& dwarf2_per_objfile
->using_index
);
7069 gdb_assert (dwp_file
!= NULL
);
7071 /* If TU skeletons have been removed then we may not have read in any
7073 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7075 dwarf2_per_objfile
->signatured_types
7076 = allocate_signatured_type_table (objfile
);
7079 find_sig_entry
.signature
= sig
;
7080 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
,
7081 &find_sig_entry
, INSERT
);
7082 sig_entry
= (struct signatured_type
*) *slot
;
7084 /* Have we already tried to read this TU?
7085 Note: sig_entry can be NULL if the skeleton TU was removed (thus it
7086 needn't exist in the global table yet). */
7087 if (sig_entry
!= NULL
)
7090 if (dwp_file
->tus
== NULL
)
7092 dwo_entry
= lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, NULL
,
7093 sig
, 1 /* is_debug_types */);
7094 if (dwo_entry
== NULL
)
7097 sig_entry
= add_type_unit (dwarf2_per_objfile
, sig
, slot
);
7098 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, sig_entry
, dwo_entry
);
7103 /* Lookup a signature based type for DW_FORM_ref_sig8.
7104 Returns NULL if signature SIG is not present in the table.
7105 It is up to the caller to complain about this. */
7107 static struct signatured_type
*
7108 lookup_signatured_type (struct dwarf2_cu
*cu
, ULONGEST sig
)
7110 struct dwarf2_per_objfile
*dwarf2_per_objfile
7111 = cu
->per_cu
->dwarf2_per_objfile
;
7114 && dwarf2_per_objfile
->using_index
)
7116 /* We're in a DWO/DWP file, and we're using .gdb_index.
7117 These cases require special processing. */
7118 if (get_dwp_file (dwarf2_per_objfile
) == NULL
)
7119 return lookup_dwo_signatured_type (cu
, sig
);
7121 return lookup_dwp_signatured_type (cu
, sig
);
7125 struct signatured_type find_entry
, *entry
;
7127 if (dwarf2_per_objfile
->signatured_types
== NULL
)
7129 find_entry
.signature
= sig
;
7130 entry
= ((struct signatured_type
*)
7131 htab_find (dwarf2_per_objfile
->signatured_types
, &find_entry
));
7136 /* Low level DIE reading support. */
7138 /* Initialize a die_reader_specs struct from a dwarf2_cu struct. */
7141 init_cu_die_reader (struct die_reader_specs
*reader
,
7142 struct dwarf2_cu
*cu
,
7143 struct dwarf2_section_info
*section
,
7144 struct dwo_file
*dwo_file
,
7145 struct abbrev_table
*abbrev_table
)
7147 gdb_assert (section
->readin
&& section
->buffer
!= NULL
);
7148 reader
->abfd
= get_section_bfd_owner (section
);
7150 reader
->dwo_file
= dwo_file
;
7151 reader
->die_section
= section
;
7152 reader
->buffer
= section
->buffer
;
7153 reader
->buffer_end
= section
->buffer
+ section
->size
;
7154 reader
->comp_dir
= NULL
;
7155 reader
->abbrev_table
= abbrev_table
;
7158 /* Subroutine of init_cutu_and_read_dies to simplify it.
7159 Read in the rest of a CU/TU top level DIE from DWO_UNIT.
7160 There's just a lot of work to do, and init_cutu_and_read_dies is big enough
7163 STUB_COMP_UNIT_DIE is for the stub DIE, we copy over certain attributes
7164 from it to the DIE in the DWO. If NULL we are skipping the stub.
7165 STUB_COMP_DIR is similar to STUB_COMP_UNIT_DIE: When reading a TU directly
7166 from the DWO file, bypassing the stub, it contains the DW_AT_comp_dir
7167 attribute of the referencing CU. At most one of STUB_COMP_UNIT_DIE and
7168 STUB_COMP_DIR may be non-NULL.
7169 *RESULT_READER,*RESULT_INFO_PTR,*RESULT_COMP_UNIT_DIE,*RESULT_HAS_CHILDREN
7170 are filled in with the info of the DIE from the DWO file.
7171 *RESULT_DWO_ABBREV_TABLE will be filled in with the abbrev table allocated
7172 from the dwo. Since *RESULT_READER references this abbrev table, it must be
7173 kept around for at least as long as *RESULT_READER.
7175 The result is non-zero if a valid (non-dummy) DIE was found. */
7178 read_cutu_die_from_dwo (struct dwarf2_per_cu_data
*this_cu
,
7179 struct dwo_unit
*dwo_unit
,
7180 struct die_info
*stub_comp_unit_die
,
7181 const char *stub_comp_dir
,
7182 struct die_reader_specs
*result_reader
,
7183 const gdb_byte
**result_info_ptr
,
7184 struct die_info
**result_comp_unit_die
,
7185 int *result_has_children
,
7186 abbrev_table_up
*result_dwo_abbrev_table
)
7188 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7189 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7190 struct dwarf2_cu
*cu
= this_cu
->cu
;
7192 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7193 struct attribute
*comp_dir
, *stmt_list
, *low_pc
, *high_pc
, *ranges
;
7194 int i
,num_extra_attrs
;
7195 struct dwarf2_section_info
*dwo_abbrev_section
;
7196 struct attribute
*attr
;
7197 struct die_info
*comp_unit_die
;
7199 /* At most one of these may be provided. */
7200 gdb_assert ((stub_comp_unit_die
!= NULL
) + (stub_comp_dir
!= NULL
) <= 1);
7202 /* These attributes aren't processed until later:
7203 DW_AT_stmt_list, DW_AT_low_pc, DW_AT_high_pc, DW_AT_ranges.
7204 DW_AT_comp_dir is used now, to find the DWO file, but it is also
7205 referenced later. However, these attributes are found in the stub
7206 which we won't have later. In order to not impose this complication
7207 on the rest of the code, we read them here and copy them to the
7216 if (stub_comp_unit_die
!= NULL
)
7218 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
7220 if (! this_cu
->is_debug_types
)
7221 stmt_list
= dwarf2_attr (stub_comp_unit_die
, DW_AT_stmt_list
, cu
);
7222 low_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_low_pc
, cu
);
7223 high_pc
= dwarf2_attr (stub_comp_unit_die
, DW_AT_high_pc
, cu
);
7224 ranges
= dwarf2_attr (stub_comp_unit_die
, DW_AT_ranges
, cu
);
7225 comp_dir
= dwarf2_attr (stub_comp_unit_die
, DW_AT_comp_dir
, cu
);
7227 /* There should be a DW_AT_addr_base attribute here (if needed).
7228 We need the value before we can process DW_FORM_GNU_addr_index
7229 or DW_FORM_addrx. */
7231 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_addr_base
, cu
);
7233 cu
->addr_base
= DW_UNSND (attr
);
7235 /* There should be a DW_AT_ranges_base attribute here (if needed).
7236 We need the value before we can process DW_AT_ranges. */
7237 cu
->ranges_base
= 0;
7238 attr
= dwarf2_attr (stub_comp_unit_die
, DW_AT_GNU_ranges_base
, cu
);
7240 cu
->ranges_base
= DW_UNSND (attr
);
7242 else if (stub_comp_dir
!= NULL
)
7244 /* Reconstruct the comp_dir attribute to simplify the code below. */
7245 comp_dir
= XOBNEW (&cu
->comp_unit_obstack
, struct attribute
);
7246 comp_dir
->name
= DW_AT_comp_dir
;
7247 comp_dir
->form
= DW_FORM_string
;
7248 DW_STRING_IS_CANONICAL (comp_dir
) = 0;
7249 DW_STRING (comp_dir
) = stub_comp_dir
;
7252 /* Set up for reading the DWO CU/TU. */
7253 cu
->dwo_unit
= dwo_unit
;
7254 dwarf2_section_info
*section
= dwo_unit
->section
;
7255 dwarf2_read_section (objfile
, section
);
7256 abfd
= get_section_bfd_owner (section
);
7257 begin_info_ptr
= info_ptr
= (section
->buffer
7258 + to_underlying (dwo_unit
->sect_off
));
7259 dwo_abbrev_section
= &dwo_unit
->dwo_file
->sections
.abbrev
;
7261 if (this_cu
->is_debug_types
)
7263 struct signatured_type
*sig_type
= (struct signatured_type
*) this_cu
;
7265 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7266 &cu
->header
, section
,
7268 info_ptr
, rcuh_kind::TYPE
);
7269 /* This is not an assert because it can be caused by bad debug info. */
7270 if (sig_type
->signature
!= cu
->header
.signature
)
7272 error (_("Dwarf Error: signature mismatch %s vs %s while reading"
7273 " TU at offset %s [in module %s]"),
7274 hex_string (sig_type
->signature
),
7275 hex_string (cu
->header
.signature
),
7276 sect_offset_str (dwo_unit
->sect_off
),
7277 bfd_get_filename (abfd
));
7279 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7280 /* For DWOs coming from DWP files, we don't know the CU length
7281 nor the type's offset in the TU until now. */
7282 dwo_unit
->length
= get_cu_length (&cu
->header
);
7283 dwo_unit
->type_offset_in_tu
= cu
->header
.type_cu_offset_in_tu
;
7285 /* Establish the type offset that can be used to lookup the type.
7286 For DWO files, we don't know it until now. */
7287 sig_type
->type_offset_in_section
7288 = dwo_unit
->sect_off
+ to_underlying (dwo_unit
->type_offset_in_tu
);
7292 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7293 &cu
->header
, section
,
7295 info_ptr
, rcuh_kind::COMPILE
);
7296 gdb_assert (dwo_unit
->sect_off
== cu
->header
.sect_off
);
7297 /* For DWOs coming from DWP files, we don't know the CU length
7299 dwo_unit
->length
= get_cu_length (&cu
->header
);
7302 *result_dwo_abbrev_table
7303 = abbrev_table_read_table (dwarf2_per_objfile
, dwo_abbrev_section
,
7304 cu
->header
.abbrev_sect_off
);
7305 init_cu_die_reader (result_reader
, cu
, section
, dwo_unit
->dwo_file
,
7306 result_dwo_abbrev_table
->get ());
7308 /* Read in the die, but leave space to copy over the attributes
7309 from the stub. This has the benefit of simplifying the rest of
7310 the code - all the work to maintain the illusion of a single
7311 DW_TAG_{compile,type}_unit DIE is done here. */
7312 num_extra_attrs
= ((stmt_list
!= NULL
)
7316 + (comp_dir
!= NULL
));
7317 info_ptr
= read_full_die_1 (result_reader
, result_comp_unit_die
, info_ptr
,
7318 result_has_children
, num_extra_attrs
);
7320 /* Copy over the attributes from the stub to the DIE we just read in. */
7321 comp_unit_die
= *result_comp_unit_die
;
7322 i
= comp_unit_die
->num_attrs
;
7323 if (stmt_list
!= NULL
)
7324 comp_unit_die
->attrs
[i
++] = *stmt_list
;
7326 comp_unit_die
->attrs
[i
++] = *low_pc
;
7327 if (high_pc
!= NULL
)
7328 comp_unit_die
->attrs
[i
++] = *high_pc
;
7330 comp_unit_die
->attrs
[i
++] = *ranges
;
7331 if (comp_dir
!= NULL
)
7332 comp_unit_die
->attrs
[i
++] = *comp_dir
;
7333 comp_unit_die
->num_attrs
+= num_extra_attrs
;
7335 if (dwarf_die_debug
)
7337 fprintf_unfiltered (gdb_stdlog
,
7338 "Read die from %s@0x%x of %s:\n",
7339 get_section_name (section
),
7340 (unsigned) (begin_info_ptr
- section
->buffer
),
7341 bfd_get_filename (abfd
));
7342 dump_die (comp_unit_die
, dwarf_die_debug
);
7345 /* Save the comp_dir attribute. If there is no DWP file then we'll read
7346 TUs by skipping the stub and going directly to the entry in the DWO file.
7347 However, skipping the stub means we won't get DW_AT_comp_dir, so we have
7348 to get it via circuitous means. Blech. */
7349 if (comp_dir
!= NULL
)
7350 result_reader
->comp_dir
= DW_STRING (comp_dir
);
7352 /* Skip dummy compilation units. */
7353 if (info_ptr
>= begin_info_ptr
+ dwo_unit
->length
7354 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7357 *result_info_ptr
= info_ptr
;
7361 /* Subroutine of init_cutu_and_read_dies to simplify it.
7362 Look up the DWO unit specified by COMP_UNIT_DIE of THIS_CU.
7363 Returns NULL if the specified DWO unit cannot be found. */
7365 static struct dwo_unit
*
7366 lookup_dwo_unit (struct dwarf2_per_cu_data
*this_cu
,
7367 struct die_info
*comp_unit_die
)
7369 struct dwarf2_cu
*cu
= this_cu
->cu
;
7371 struct dwo_unit
*dwo_unit
;
7372 const char *comp_dir
, *dwo_name
;
7374 gdb_assert (cu
!= NULL
);
7376 /* Yeah, we look dwo_name up again, but it simplifies the code. */
7377 dwo_name
= dwarf2_string_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7378 comp_dir
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
7380 if (this_cu
->is_debug_types
)
7382 struct signatured_type
*sig_type
;
7384 /* Since this_cu is the first member of struct signatured_type,
7385 we can go from a pointer to one to a pointer to the other. */
7386 sig_type
= (struct signatured_type
*) this_cu
;
7387 signature
= sig_type
->signature
;
7388 dwo_unit
= lookup_dwo_type_unit (sig_type
, dwo_name
, comp_dir
);
7392 struct attribute
*attr
;
7394 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
7396 error (_("Dwarf Error: missing dwo_id for dwo_name %s"
7398 dwo_name
, objfile_name (this_cu
->dwarf2_per_objfile
->objfile
));
7399 signature
= DW_UNSND (attr
);
7400 dwo_unit
= lookup_dwo_comp_unit (this_cu
, dwo_name
, comp_dir
,
7407 /* Subroutine of init_cutu_and_read_dies to simplify it.
7408 See it for a description of the parameters.
7409 Read a TU directly from a DWO file, bypassing the stub. */
7412 init_tu_and_read_dwo_dies (struct dwarf2_per_cu_data
*this_cu
,
7413 int use_existing_cu
, int keep
,
7414 die_reader_func_ftype
*die_reader_func
,
7417 std::unique_ptr
<dwarf2_cu
> new_cu
;
7418 struct signatured_type
*sig_type
;
7419 struct die_reader_specs reader
;
7420 const gdb_byte
*info_ptr
;
7421 struct die_info
*comp_unit_die
;
7423 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7425 /* Verify we can do the following downcast, and that we have the
7427 gdb_assert (this_cu
->is_debug_types
&& this_cu
->reading_dwo_directly
);
7428 sig_type
= (struct signatured_type
*) this_cu
;
7429 gdb_assert (sig_type
->dwo_unit
!= NULL
);
7431 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7433 gdb_assert (this_cu
->cu
->dwo_unit
== sig_type
->dwo_unit
);
7434 /* There's no need to do the rereading_dwo_cu handling that
7435 init_cutu_and_read_dies does since we don't read the stub. */
7439 /* If !use_existing_cu, this_cu->cu must be NULL. */
7440 gdb_assert (this_cu
->cu
== NULL
);
7441 new_cu
.reset (new dwarf2_cu (this_cu
));
7444 /* A future optimization, if needed, would be to use an existing
7445 abbrev table. When reading DWOs with skeletonless TUs, all the TUs
7446 could share abbrev tables. */
7448 /* The abbreviation table used by READER, this must live at least as long as
7450 abbrev_table_up dwo_abbrev_table
;
7452 if (read_cutu_die_from_dwo (this_cu
, sig_type
->dwo_unit
,
7453 NULL
/* stub_comp_unit_die */,
7454 sig_type
->dwo_unit
->dwo_file
->comp_dir
,
7456 &comp_unit_die
, &has_children
,
7457 &dwo_abbrev_table
) == 0)
7463 /* All the "real" work is done here. */
7464 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7466 /* This duplicates the code in init_cutu_and_read_dies,
7467 but the alternative is making the latter more complex.
7468 This function is only for the special case of using DWO files directly:
7469 no point in overly complicating the general case just to handle this. */
7470 if (new_cu
!= NULL
&& keep
)
7472 /* Link this CU into read_in_chain. */
7473 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7474 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7475 /* The chain owns it now. */
7480 /* Initialize a CU (or TU) and read its DIEs.
7481 If the CU defers to a DWO file, read the DWO file as well.
7483 ABBREV_TABLE, if non-NULL, is the abbreviation table to use.
7484 Otherwise the table specified in the comp unit header is read in and used.
7485 This is an optimization for when we already have the abbrev table.
7487 If USE_EXISTING_CU is non-zero, and THIS_CU->cu is non-NULL, then use it.
7488 Otherwise, a new CU is allocated with xmalloc.
7490 If KEEP is non-zero, then if we allocated a dwarf2_cu we add it to
7491 read_in_chain. Otherwise the dwarf2_cu data is freed at the end.
7493 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7494 linker) then DIE_READER_FUNC will not get called. */
7497 init_cutu_and_read_dies (struct dwarf2_per_cu_data
*this_cu
,
7498 struct abbrev_table
*abbrev_table
,
7499 int use_existing_cu
, int keep
,
7501 die_reader_func_ftype
*die_reader_func
,
7504 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7505 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7506 struct dwarf2_section_info
*section
= this_cu
->section
;
7507 bfd
*abfd
= get_section_bfd_owner (section
);
7508 struct dwarf2_cu
*cu
;
7509 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7510 struct die_reader_specs reader
;
7511 struct die_info
*comp_unit_die
;
7513 struct attribute
*attr
;
7514 struct signatured_type
*sig_type
= NULL
;
7515 struct dwarf2_section_info
*abbrev_section
;
7516 /* Non-zero if CU currently points to a DWO file and we need to
7517 reread it. When this happens we need to reread the skeleton die
7518 before we can reread the DWO file (this only applies to CUs, not TUs). */
7519 int rereading_dwo_cu
= 0;
7521 if (dwarf_die_debug
)
7522 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7523 this_cu
->is_debug_types
? "type" : "comp",
7524 sect_offset_str (this_cu
->sect_off
));
7526 if (use_existing_cu
)
7529 /* If we're reading a TU directly from a DWO file, including a virtual DWO
7530 file (instead of going through the stub), short-circuit all of this. */
7531 if (this_cu
->reading_dwo_directly
)
7533 /* Narrow down the scope of possibilities to have to understand. */
7534 gdb_assert (this_cu
->is_debug_types
);
7535 gdb_assert (abbrev_table
== NULL
);
7536 init_tu_and_read_dwo_dies (this_cu
, use_existing_cu
, keep
,
7537 die_reader_func
, data
);
7541 /* This is cheap if the section is already read in. */
7542 dwarf2_read_section (objfile
, section
);
7544 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7546 abbrev_section
= get_abbrev_section_for_cu (this_cu
);
7548 std::unique_ptr
<dwarf2_cu
> new_cu
;
7549 if (use_existing_cu
&& this_cu
->cu
!= NULL
)
7552 /* If this CU is from a DWO file we need to start over, we need to
7553 refetch the attributes from the skeleton CU.
7554 This could be optimized by retrieving those attributes from when we
7555 were here the first time: the previous comp_unit_die was stored in
7556 comp_unit_obstack. But there's no data yet that we need this
7558 if (cu
->dwo_unit
!= NULL
)
7559 rereading_dwo_cu
= 1;
7563 /* If !use_existing_cu, this_cu->cu must be NULL. */
7564 gdb_assert (this_cu
->cu
== NULL
);
7565 new_cu
.reset (new dwarf2_cu (this_cu
));
7569 /* Get the header. */
7570 if (to_underlying (cu
->header
.first_die_cu_offset
) != 0 && !rereading_dwo_cu
)
7572 /* We already have the header, there's no need to read it in again. */
7573 info_ptr
+= to_underlying (cu
->header
.first_die_cu_offset
);
7577 if (this_cu
->is_debug_types
)
7579 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7580 &cu
->header
, section
,
7581 abbrev_section
, info_ptr
,
7584 /* Since per_cu is the first member of struct signatured_type,
7585 we can go from a pointer to one to a pointer to the other. */
7586 sig_type
= (struct signatured_type
*) this_cu
;
7587 gdb_assert (sig_type
->signature
== cu
->header
.signature
);
7588 gdb_assert (sig_type
->type_offset_in_tu
7589 == cu
->header
.type_cu_offset_in_tu
);
7590 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7592 /* LENGTH has not been set yet for type units if we're
7593 using .gdb_index. */
7594 this_cu
->length
= get_cu_length (&cu
->header
);
7596 /* Establish the type offset that can be used to lookup the type. */
7597 sig_type
->type_offset_in_section
=
7598 this_cu
->sect_off
+ to_underlying (sig_type
->type_offset_in_tu
);
7600 this_cu
->dwarf_version
= cu
->header
.version
;
7604 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7605 &cu
->header
, section
,
7608 rcuh_kind::COMPILE
);
7610 gdb_assert (this_cu
->sect_off
== cu
->header
.sect_off
);
7611 gdb_assert (this_cu
->length
== get_cu_length (&cu
->header
));
7612 this_cu
->dwarf_version
= cu
->header
.version
;
7616 /* Skip dummy compilation units. */
7617 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7618 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7621 /* If we don't have them yet, read the abbrevs for this compilation unit.
7622 And if we need to read them now, make sure they're freed when we're
7623 done (own the table through ABBREV_TABLE_HOLDER). */
7624 abbrev_table_up abbrev_table_holder
;
7625 if (abbrev_table
!= NULL
)
7626 gdb_assert (cu
->header
.abbrev_sect_off
== abbrev_table
->sect_off
);
7630 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7631 cu
->header
.abbrev_sect_off
);
7632 abbrev_table
= abbrev_table_holder
.get ();
7635 /* Read the top level CU/TU die. */
7636 init_cu_die_reader (&reader
, cu
, section
, NULL
, abbrev_table
);
7637 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7639 if (skip_partial
&& comp_unit_die
->tag
== DW_TAG_partial_unit
)
7642 /* If we are in a DWO stub, process it and then read in the "real" CU/TU
7643 from the DWO file. read_cutu_die_from_dwo will allocate the abbreviation
7644 table from the DWO file and pass the ownership over to us. It will be
7645 referenced from READER, so we must make sure to free it after we're done
7648 Note that if USE_EXISTING_OK != 0, and THIS_CU->cu already contains a
7649 DWO CU, that this test will fail (the attribute will not be present). */
7650 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_name
, cu
);
7651 abbrev_table_up dwo_abbrev_table
;
7654 struct dwo_unit
*dwo_unit
;
7655 struct die_info
*dwo_comp_unit_die
;
7659 complaint (_("compilation unit with DW_AT_GNU_dwo_name"
7660 " has children (offset %s) [in module %s]"),
7661 sect_offset_str (this_cu
->sect_off
),
7662 bfd_get_filename (abfd
));
7664 dwo_unit
= lookup_dwo_unit (this_cu
, comp_unit_die
);
7665 if (dwo_unit
!= NULL
)
7667 if (read_cutu_die_from_dwo (this_cu
, dwo_unit
,
7668 comp_unit_die
, NULL
,
7670 &dwo_comp_unit_die
, &has_children
,
7671 &dwo_abbrev_table
) == 0)
7676 comp_unit_die
= dwo_comp_unit_die
;
7680 /* Yikes, we couldn't find the rest of the DIE, we only have
7681 the stub. A complaint has already been logged. There's
7682 not much more we can do except pass on the stub DIE to
7683 die_reader_func. We don't want to throw an error on bad
7688 /* All of the above is setup for this call. Yikes. */
7689 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7691 /* Done, clean up. */
7692 if (new_cu
!= NULL
&& keep
)
7694 /* Link this CU into read_in_chain. */
7695 this_cu
->cu
->read_in_chain
= dwarf2_per_objfile
->read_in_chain
;
7696 dwarf2_per_objfile
->read_in_chain
= this_cu
;
7697 /* The chain owns it now. */
7702 /* Read CU/TU THIS_CU but do not follow DW_AT_GNU_dwo_name if present.
7703 DWO_FILE, if non-NULL, is the DWO file to read (the caller is assumed
7704 to have already done the lookup to find the DWO file).
7706 The caller is required to fill in THIS_CU->section, THIS_CU->offset, and
7707 THIS_CU->is_debug_types, but nothing else.
7709 We fill in THIS_CU->length.
7711 WARNING: If THIS_CU is a "dummy CU" (used as filler by the incremental
7712 linker) then DIE_READER_FUNC will not get called.
7714 THIS_CU->cu is always freed when done.
7715 This is done in order to not leave THIS_CU->cu in a state where we have
7716 to care whether it refers to the "main" CU or the DWO CU. */
7719 init_cutu_and_read_dies_no_follow (struct dwarf2_per_cu_data
*this_cu
,
7720 struct dwo_file
*dwo_file
,
7721 die_reader_func_ftype
*die_reader_func
,
7724 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_cu
->dwarf2_per_objfile
;
7725 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7726 struct dwarf2_section_info
*section
= this_cu
->section
;
7727 bfd
*abfd
= get_section_bfd_owner (section
);
7728 struct dwarf2_section_info
*abbrev_section
;
7729 const gdb_byte
*begin_info_ptr
, *info_ptr
;
7730 struct die_reader_specs reader
;
7731 struct die_info
*comp_unit_die
;
7734 if (dwarf_die_debug
)
7735 fprintf_unfiltered (gdb_stdlog
, "Reading %s unit at offset %s\n",
7736 this_cu
->is_debug_types
? "type" : "comp",
7737 sect_offset_str (this_cu
->sect_off
));
7739 gdb_assert (this_cu
->cu
== NULL
);
7741 abbrev_section
= (dwo_file
!= NULL
7742 ? &dwo_file
->sections
.abbrev
7743 : get_abbrev_section_for_cu (this_cu
));
7745 /* This is cheap if the section is already read in. */
7746 dwarf2_read_section (objfile
, section
);
7748 struct dwarf2_cu
cu (this_cu
);
7750 begin_info_ptr
= info_ptr
= section
->buffer
+ to_underlying (this_cu
->sect_off
);
7751 info_ptr
= read_and_check_comp_unit_head (dwarf2_per_objfile
,
7752 &cu
.header
, section
,
7753 abbrev_section
, info_ptr
,
7754 (this_cu
->is_debug_types
7756 : rcuh_kind::COMPILE
));
7758 this_cu
->length
= get_cu_length (&cu
.header
);
7760 /* Skip dummy compilation units. */
7761 if (info_ptr
>= begin_info_ptr
+ this_cu
->length
7762 || peek_abbrev_code (abfd
, info_ptr
) == 0)
7765 abbrev_table_up abbrev_table
7766 = abbrev_table_read_table (dwarf2_per_objfile
, abbrev_section
,
7767 cu
.header
.abbrev_sect_off
);
7769 init_cu_die_reader (&reader
, &cu
, section
, dwo_file
, abbrev_table
.get ());
7770 info_ptr
= read_full_die (&reader
, &comp_unit_die
, info_ptr
, &has_children
);
7772 die_reader_func (&reader
, info_ptr
, comp_unit_die
, has_children
, data
);
7775 /* Read a CU/TU, except that this does not look for DW_AT_GNU_dwo_name and
7776 does not lookup the specified DWO file.
7777 This cannot be used to read DWO files.
7779 THIS_CU->cu is always freed when done.
7780 This is done in order to not leave THIS_CU->cu in a state where we have
7781 to care whether it refers to the "main" CU or the DWO CU.
7782 We can revisit this if the data shows there's a performance issue. */
7785 init_cutu_and_read_dies_simple (struct dwarf2_per_cu_data
*this_cu
,
7786 die_reader_func_ftype
*die_reader_func
,
7789 init_cutu_and_read_dies_no_follow (this_cu
, NULL
, die_reader_func
, data
);
7792 /* Type Unit Groups.
7794 Type Unit Groups are a way to collapse the set of all TUs (type units) into
7795 a more manageable set. The grouping is done by DW_AT_stmt_list entry
7796 so that all types coming from the same compilation (.o file) are grouped
7797 together. A future step could be to put the types in the same symtab as
7798 the CU the types ultimately came from. */
7801 hash_type_unit_group (const void *item
)
7803 const struct type_unit_group
*tu_group
7804 = (const struct type_unit_group
*) item
;
7806 return hash_stmt_list_entry (&tu_group
->hash
);
7810 eq_type_unit_group (const void *item_lhs
, const void *item_rhs
)
7812 const struct type_unit_group
*lhs
= (const struct type_unit_group
*) item_lhs
;
7813 const struct type_unit_group
*rhs
= (const struct type_unit_group
*) item_rhs
;
7815 return eq_stmt_list_entry (&lhs
->hash
, &rhs
->hash
);
7818 /* Allocate a hash table for type unit groups. */
7821 allocate_type_unit_groups_table (struct objfile
*objfile
)
7823 return htab_create_alloc_ex (3,
7824 hash_type_unit_group
,
7827 &objfile
->objfile_obstack
,
7828 hashtab_obstack_allocate
,
7829 dummy_obstack_deallocate
);
7832 /* Type units that don't have DW_AT_stmt_list are grouped into their own
7833 partial symtabs. We combine several TUs per psymtab to not let the size
7834 of any one psymtab grow too big. */
7835 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
7836 #define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
7838 /* Helper routine for get_type_unit_group.
7839 Create the type_unit_group object used to hold one or more TUs. */
7841 static struct type_unit_group
*
7842 create_type_unit_group (struct dwarf2_cu
*cu
, sect_offset line_offset_struct
)
7844 struct dwarf2_per_objfile
*dwarf2_per_objfile
7845 = cu
->per_cu
->dwarf2_per_objfile
;
7846 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
7847 struct dwarf2_per_cu_data
*per_cu
;
7848 struct type_unit_group
*tu_group
;
7850 tu_group
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7851 struct type_unit_group
);
7852 per_cu
= &tu_group
->per_cu
;
7853 per_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
7855 if (dwarf2_per_objfile
->using_index
)
7857 per_cu
->v
.quick
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
7858 struct dwarf2_per_cu_quick_data
);
7862 unsigned int line_offset
= to_underlying (line_offset_struct
);
7863 struct partial_symtab
*pst
;
7866 /* Give the symtab a useful name for debug purposes. */
7867 if ((line_offset
& NO_STMT_LIST_TYPE_UNIT_PSYMTAB
) != 0)
7868 name
= string_printf ("<type_units_%d>",
7869 (line_offset
& ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB
));
7871 name
= string_printf ("<type_units_at_0x%x>", line_offset
);
7873 pst
= create_partial_symtab (per_cu
, name
.c_str ());
7877 tu_group
->hash
.dwo_unit
= cu
->dwo_unit
;
7878 tu_group
->hash
.line_sect_off
= line_offset_struct
;
7883 /* Look up the type_unit_group for type unit CU, and create it if necessary.
7884 STMT_LIST is a DW_AT_stmt_list attribute. */
7886 static struct type_unit_group
*
7887 get_type_unit_group (struct dwarf2_cu
*cu
, const struct attribute
*stmt_list
)
7889 struct dwarf2_per_objfile
*dwarf2_per_objfile
7890 = cu
->per_cu
->dwarf2_per_objfile
;
7891 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
7892 struct type_unit_group
*tu_group
;
7894 unsigned int line_offset
;
7895 struct type_unit_group type_unit_group_for_lookup
;
7897 if (dwarf2_per_objfile
->type_unit_groups
== NULL
)
7899 dwarf2_per_objfile
->type_unit_groups
=
7900 allocate_type_unit_groups_table (dwarf2_per_objfile
->objfile
);
7903 /* Do we need to create a new group, or can we use an existing one? */
7907 line_offset
= DW_UNSND (stmt_list
);
7908 ++tu_stats
->nr_symtab_sharers
;
7912 /* Ugh, no stmt_list. Rare, but we have to handle it.
7913 We can do various things here like create one group per TU or
7914 spread them over multiple groups to split up the expansion work.
7915 To avoid worst case scenarios (too many groups or too large groups)
7916 we, umm, group them in bunches. */
7917 line_offset
= (NO_STMT_LIST_TYPE_UNIT_PSYMTAB
7918 | (tu_stats
->nr_stmt_less_type_units
7919 / NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE
));
7920 ++tu_stats
->nr_stmt_less_type_units
;
7923 type_unit_group_for_lookup
.hash
.dwo_unit
= cu
->dwo_unit
;
7924 type_unit_group_for_lookup
.hash
.line_sect_off
= (sect_offset
) line_offset
;
7925 slot
= htab_find_slot (dwarf2_per_objfile
->type_unit_groups
,
7926 &type_unit_group_for_lookup
, INSERT
);
7929 tu_group
= (struct type_unit_group
*) *slot
;
7930 gdb_assert (tu_group
!= NULL
);
7934 sect_offset line_offset_struct
= (sect_offset
) line_offset
;
7935 tu_group
= create_type_unit_group (cu
, line_offset_struct
);
7937 ++tu_stats
->nr_symtabs
;
7943 /* Partial symbol tables. */
7945 /* Create a psymtab named NAME and assign it to PER_CU.
7947 The caller must fill in the following details:
7948 dirname, textlow, texthigh. */
7950 static struct partial_symtab
*
7951 create_partial_symtab (struct dwarf2_per_cu_data
*per_cu
, const char *name
)
7953 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
7954 struct partial_symtab
*pst
;
7956 pst
= start_psymtab_common (objfile
, name
, 0);
7958 pst
->psymtabs_addrmap_supported
= 1;
7960 /* This is the glue that links PST into GDB's symbol API. */
7961 pst
->read_symtab_private
= per_cu
;
7962 pst
->read_symtab
= dwarf2_read_symtab
;
7963 per_cu
->v
.psymtab
= pst
;
7968 /* The DATA object passed to process_psymtab_comp_unit_reader has this
7971 struct process_psymtab_comp_unit_data
7973 /* True if we are reading a DW_TAG_partial_unit. */
7975 int want_partial_unit
;
7977 /* The "pretend" language that is used if the CU doesn't declare a
7980 enum language pretend_language
;
7983 /* die_reader_func for process_psymtab_comp_unit. */
7986 process_psymtab_comp_unit_reader (const struct die_reader_specs
*reader
,
7987 const gdb_byte
*info_ptr
,
7988 struct die_info
*comp_unit_die
,
7992 struct dwarf2_cu
*cu
= reader
->cu
;
7993 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
7994 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
7995 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
7997 CORE_ADDR best_lowpc
= 0, best_highpc
= 0;
7998 struct partial_symtab
*pst
;
7999 enum pc_bounds_kind cu_bounds_kind
;
8000 const char *filename
;
8001 struct process_psymtab_comp_unit_data
*info
8002 = (struct process_psymtab_comp_unit_data
*) data
;
8004 if (comp_unit_die
->tag
== DW_TAG_partial_unit
&& !info
->want_partial_unit
)
8007 gdb_assert (! per_cu
->is_debug_types
);
8009 prepare_one_comp_unit (cu
, comp_unit_die
, info
->pretend_language
);
8011 /* Allocate a new partial symbol table structure. */
8012 filename
= dwarf2_string_attr (comp_unit_die
, DW_AT_name
, cu
);
8013 if (filename
== NULL
)
8016 pst
= create_partial_symtab (per_cu
, filename
);
8018 /* This must be done before calling dwarf2_build_include_psymtabs. */
8019 pst
->dirname
= dwarf2_string_attr (comp_unit_die
, DW_AT_comp_dir
, cu
);
8021 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8023 dwarf2_find_base_address (comp_unit_die
, cu
);
8025 /* Possibly set the default values of LOWPC and HIGHPC from
8027 cu_bounds_kind
= dwarf2_get_pc_bounds (comp_unit_die
, &best_lowpc
,
8028 &best_highpc
, cu
, pst
);
8029 if (cu_bounds_kind
== PC_BOUNDS_HIGH_LOW
&& best_lowpc
< best_highpc
)
8032 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_lowpc
+ baseaddr
)
8035 = (gdbarch_adjust_dwarf2_addr (gdbarch
, best_highpc
+ baseaddr
)
8037 /* Store the contiguous range if it is not empty; it can be
8038 empty for CUs with no code. */
8039 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
8043 /* Check if comp unit has_children.
8044 If so, read the rest of the partial symbols from this comp unit.
8045 If not, there's no more debug_info for this comp unit. */
8048 struct partial_die_info
*first_die
;
8049 CORE_ADDR lowpc
, highpc
;
8051 lowpc
= ((CORE_ADDR
) -1);
8052 highpc
= ((CORE_ADDR
) 0);
8054 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8056 scan_partial_symbols (first_die
, &lowpc
, &highpc
,
8057 cu_bounds_kind
<= PC_BOUNDS_INVALID
, cu
);
8059 /* If we didn't find a lowpc, set it to highpc to avoid
8060 complaints from `maint check'. */
8061 if (lowpc
== ((CORE_ADDR
) -1))
8064 /* If the compilation unit didn't have an explicit address range,
8065 then use the information extracted from its child dies. */
8066 if (cu_bounds_kind
<= PC_BOUNDS_INVALID
)
8069 best_highpc
= highpc
;
8072 pst
->set_text_low (gdbarch_adjust_dwarf2_addr (gdbarch
,
8073 best_lowpc
+ baseaddr
)
8075 pst
->set_text_high (gdbarch_adjust_dwarf2_addr (gdbarch
,
8076 best_highpc
+ baseaddr
)
8079 end_psymtab_common (objfile
, pst
);
8081 if (!VEC_empty (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
))
8084 int len
= VEC_length (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
8085 struct dwarf2_per_cu_data
*iter
;
8087 /* Fill in 'dependencies' here; we fill in 'users' in a
8089 pst
->number_of_dependencies
= len
;
8091 = objfile
->partial_symtabs
->allocate_dependencies (len
);
8093 VEC_iterate (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
8096 pst
->dependencies
[i
] = iter
->v
.psymtab
;
8098 VEC_free (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
);
8101 /* Get the list of files included in the current compilation unit,
8102 and build a psymtab for each of them. */
8103 dwarf2_build_include_psymtabs (cu
, comp_unit_die
, pst
);
8105 if (dwarf_read_debug
)
8106 fprintf_unfiltered (gdb_stdlog
,
8107 "Psymtab for %s unit @%s: %s - %s"
8108 ", %d global, %d static syms\n",
8109 per_cu
->is_debug_types
? "type" : "comp",
8110 sect_offset_str (per_cu
->sect_off
),
8111 paddress (gdbarch
, pst
->text_low (objfile
)),
8112 paddress (gdbarch
, pst
->text_high (objfile
)),
8113 pst
->n_global_syms
, pst
->n_static_syms
);
8116 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8117 Process compilation unit THIS_CU for a psymtab. */
8120 process_psymtab_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
8121 int want_partial_unit
,
8122 enum language pretend_language
)
8124 /* If this compilation unit was already read in, free the
8125 cached copy in order to read it in again. This is
8126 necessary because we skipped some symbols when we first
8127 read in the compilation unit (see load_partial_dies).
8128 This problem could be avoided, but the benefit is unclear. */
8129 if (this_cu
->cu
!= NULL
)
8130 free_one_cached_comp_unit (this_cu
);
8132 if (this_cu
->is_debug_types
)
8133 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, false,
8134 build_type_psymtabs_reader
, NULL
);
8137 process_psymtab_comp_unit_data info
;
8138 info
.want_partial_unit
= want_partial_unit
;
8139 info
.pretend_language
= pretend_language
;
8140 init_cutu_and_read_dies (this_cu
, NULL
, 0, 0, false,
8141 process_psymtab_comp_unit_reader
, &info
);
8144 /* Age out any secondary CUs. */
8145 age_cached_comp_units (this_cu
->dwarf2_per_objfile
);
8148 /* Reader function for build_type_psymtabs. */
8151 build_type_psymtabs_reader (const struct die_reader_specs
*reader
,
8152 const gdb_byte
*info_ptr
,
8153 struct die_info
*type_unit_die
,
8157 struct dwarf2_per_objfile
*dwarf2_per_objfile
8158 = reader
->cu
->per_cu
->dwarf2_per_objfile
;
8159 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8160 struct dwarf2_cu
*cu
= reader
->cu
;
8161 struct dwarf2_per_cu_data
*per_cu
= cu
->per_cu
;
8162 struct signatured_type
*sig_type
;
8163 struct type_unit_group
*tu_group
;
8164 struct attribute
*attr
;
8165 struct partial_die_info
*first_die
;
8166 CORE_ADDR lowpc
, highpc
;
8167 struct partial_symtab
*pst
;
8169 gdb_assert (data
== NULL
);
8170 gdb_assert (per_cu
->is_debug_types
);
8171 sig_type
= (struct signatured_type
*) per_cu
;
8176 attr
= dwarf2_attr_no_follow (type_unit_die
, DW_AT_stmt_list
);
8177 tu_group
= get_type_unit_group (cu
, attr
);
8179 VEC_safe_push (sig_type_ptr
, tu_group
->tus
, sig_type
);
8181 prepare_one_comp_unit (cu
, type_unit_die
, language_minimal
);
8182 pst
= create_partial_symtab (per_cu
, "");
8185 first_die
= load_partial_dies (reader
, info_ptr
, 1);
8187 lowpc
= (CORE_ADDR
) -1;
8188 highpc
= (CORE_ADDR
) 0;
8189 scan_partial_symbols (first_die
, &lowpc
, &highpc
, 0, cu
);
8191 end_psymtab_common (objfile
, pst
);
8194 /* Struct used to sort TUs by their abbreviation table offset. */
8196 struct tu_abbrev_offset
8198 tu_abbrev_offset (signatured_type
*sig_type_
, sect_offset abbrev_offset_
)
8199 : sig_type (sig_type_
), abbrev_offset (abbrev_offset_
)
8202 signatured_type
*sig_type
;
8203 sect_offset abbrev_offset
;
8206 /* Helper routine for build_type_psymtabs_1, passed to std::sort. */
8209 sort_tu_by_abbrev_offset (const struct tu_abbrev_offset
&a
,
8210 const struct tu_abbrev_offset
&b
)
8212 return a
.abbrev_offset
< b
.abbrev_offset
;
8215 /* Efficiently read all the type units.
8216 This does the bulk of the work for build_type_psymtabs.
8218 The efficiency is because we sort TUs by the abbrev table they use and
8219 only read each abbrev table once. In one program there are 200K TUs
8220 sharing 8K abbrev tables.
8222 The main purpose of this function is to support building the
8223 dwarf2_per_objfile->type_unit_groups table.
8224 TUs typically share the DW_AT_stmt_list of the CU they came from, so we
8225 can collapse the search space by grouping them by stmt_list.
8226 The savings can be significant, in the same program from above the 200K TUs
8227 share 8K stmt_list tables.
8229 FUNC is expected to call get_type_unit_group, which will create the
8230 struct type_unit_group if necessary and add it to
8231 dwarf2_per_objfile->type_unit_groups. */
8234 build_type_psymtabs_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8236 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8237 abbrev_table_up abbrev_table
;
8238 sect_offset abbrev_offset
;
8240 /* It's up to the caller to not call us multiple times. */
8241 gdb_assert (dwarf2_per_objfile
->type_unit_groups
== NULL
);
8243 if (dwarf2_per_objfile
->all_type_units
.empty ())
8246 /* TUs typically share abbrev tables, and there can be way more TUs than
8247 abbrev tables. Sort by abbrev table to reduce the number of times we
8248 read each abbrev table in.
8249 Alternatives are to punt or to maintain a cache of abbrev tables.
8250 This is simpler and efficient enough for now.
8252 Later we group TUs by their DW_AT_stmt_list value (as this defines the
8253 symtab to use). Typically TUs with the same abbrev offset have the same
8254 stmt_list value too so in practice this should work well.
8256 The basic algorithm here is:
8258 sort TUs by abbrev table
8259 for each TU with same abbrev table:
8260 read abbrev table if first user
8261 read TU top level DIE
8262 [IWBN if DWO skeletons had DW_AT_stmt_list]
8265 if (dwarf_read_debug
)
8266 fprintf_unfiltered (gdb_stdlog
, "Building type unit groups ...\n");
8268 /* Sort in a separate table to maintain the order of all_type_units
8269 for .gdb_index: TU indices directly index all_type_units. */
8270 std::vector
<tu_abbrev_offset
> sorted_by_abbrev
;
8271 sorted_by_abbrev
.reserve (dwarf2_per_objfile
->all_type_units
.size ());
8273 for (signatured_type
*sig_type
: dwarf2_per_objfile
->all_type_units
)
8274 sorted_by_abbrev
.emplace_back
8275 (sig_type
, read_abbrev_offset (dwarf2_per_objfile
,
8276 sig_type
->per_cu
.section
,
8277 sig_type
->per_cu
.sect_off
));
8279 std::sort (sorted_by_abbrev
.begin (), sorted_by_abbrev
.end (),
8280 sort_tu_by_abbrev_offset
);
8282 abbrev_offset
= (sect_offset
) ~(unsigned) 0;
8284 for (const tu_abbrev_offset
&tu
: sorted_by_abbrev
)
8286 /* Switch to the next abbrev table if necessary. */
8287 if (abbrev_table
== NULL
8288 || tu
.abbrev_offset
!= abbrev_offset
)
8290 abbrev_offset
= tu
.abbrev_offset
;
8292 abbrev_table_read_table (dwarf2_per_objfile
,
8293 &dwarf2_per_objfile
->abbrev
,
8295 ++tu_stats
->nr_uniq_abbrev_tables
;
8298 init_cutu_and_read_dies (&tu
.sig_type
->per_cu
, abbrev_table
.get (),
8299 0, 0, false, build_type_psymtabs_reader
, NULL
);
8303 /* Print collected type unit statistics. */
8306 print_tu_stats (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8308 struct tu_stats
*tu_stats
= &dwarf2_per_objfile
->tu_stats
;
8310 fprintf_unfiltered (gdb_stdlog
, "Type unit statistics:\n");
8311 fprintf_unfiltered (gdb_stdlog
, " %zu TUs\n",
8312 dwarf2_per_objfile
->all_type_units
.size ());
8313 fprintf_unfiltered (gdb_stdlog
, " %d uniq abbrev tables\n",
8314 tu_stats
->nr_uniq_abbrev_tables
);
8315 fprintf_unfiltered (gdb_stdlog
, " %d symtabs from stmt_list entries\n",
8316 tu_stats
->nr_symtabs
);
8317 fprintf_unfiltered (gdb_stdlog
, " %d symtab sharers\n",
8318 tu_stats
->nr_symtab_sharers
);
8319 fprintf_unfiltered (gdb_stdlog
, " %d type units without a stmt_list\n",
8320 tu_stats
->nr_stmt_less_type_units
);
8321 fprintf_unfiltered (gdb_stdlog
, " %d all_type_units reallocs\n",
8322 tu_stats
->nr_all_type_units_reallocs
);
8325 /* Traversal function for build_type_psymtabs. */
8328 build_type_psymtab_dependencies (void **slot
, void *info
)
8330 struct dwarf2_per_objfile
*dwarf2_per_objfile
8331 = (struct dwarf2_per_objfile
*) info
;
8332 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8333 struct type_unit_group
*tu_group
= (struct type_unit_group
*) *slot
;
8334 struct dwarf2_per_cu_data
*per_cu
= &tu_group
->per_cu
;
8335 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8336 int len
= VEC_length (sig_type_ptr
, tu_group
->tus
);
8337 struct signatured_type
*iter
;
8340 gdb_assert (len
> 0);
8341 gdb_assert (IS_TYPE_UNIT_GROUP (per_cu
));
8343 pst
->number_of_dependencies
= len
;
8344 pst
->dependencies
= objfile
->partial_symtabs
->allocate_dependencies (len
);
8346 VEC_iterate (sig_type_ptr
, tu_group
->tus
, i
, iter
);
8349 gdb_assert (iter
->per_cu
.is_debug_types
);
8350 pst
->dependencies
[i
] = iter
->per_cu
.v
.psymtab
;
8351 iter
->type_unit_group
= tu_group
;
8354 VEC_free (sig_type_ptr
, tu_group
->tus
);
8359 /* Subroutine of dwarf2_build_psymtabs_hard to simplify it.
8360 Build partial symbol tables for the .debug_types comp-units. */
8363 build_type_psymtabs (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8365 if (! create_all_type_units (dwarf2_per_objfile
))
8368 build_type_psymtabs_1 (dwarf2_per_objfile
);
8371 /* Traversal function for process_skeletonless_type_unit.
8372 Read a TU in a DWO file and build partial symbols for it. */
8375 process_skeletonless_type_unit (void **slot
, void *info
)
8377 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
8378 struct dwarf2_per_objfile
*dwarf2_per_objfile
8379 = (struct dwarf2_per_objfile
*) info
;
8380 struct signatured_type find_entry
, *entry
;
8382 /* If this TU doesn't exist in the global table, add it and read it in. */
8384 if (dwarf2_per_objfile
->signatured_types
== NULL
)
8386 dwarf2_per_objfile
->signatured_types
8387 = allocate_signatured_type_table (dwarf2_per_objfile
->objfile
);
8390 find_entry
.signature
= dwo_unit
->signature
;
8391 slot
= htab_find_slot (dwarf2_per_objfile
->signatured_types
, &find_entry
,
8393 /* If we've already seen this type there's nothing to do. What's happening
8394 is we're doing our own version of comdat-folding here. */
8398 /* This does the job that create_all_type_units would have done for
8400 entry
= add_type_unit (dwarf2_per_objfile
, dwo_unit
->signature
, slot
);
8401 fill_in_sig_entry_from_dwo_entry (dwarf2_per_objfile
, entry
, dwo_unit
);
8404 /* This does the job that build_type_psymtabs_1 would have done. */
8405 init_cutu_and_read_dies (&entry
->per_cu
, NULL
, 0, 0, false,
8406 build_type_psymtabs_reader
, NULL
);
8411 /* Traversal function for process_skeletonless_type_units. */
8414 process_dwo_file_for_skeletonless_type_units (void **slot
, void *info
)
8416 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
8418 if (dwo_file
->tus
!= NULL
)
8420 htab_traverse_noresize (dwo_file
->tus
,
8421 process_skeletonless_type_unit
, info
);
8427 /* Scan all TUs of DWO files, verifying we've processed them.
8428 This is needed in case a TU was emitted without its skeleton.
8429 Note: This can't be done until we know what all the DWO files are. */
8432 process_skeletonless_type_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8434 /* Skeletonless TUs in DWP files without .gdb_index is not supported yet. */
8435 if (get_dwp_file (dwarf2_per_objfile
) == NULL
8436 && dwarf2_per_objfile
->dwo_files
!= NULL
)
8438 htab_traverse_noresize (dwarf2_per_objfile
->dwo_files
,
8439 process_dwo_file_for_skeletonless_type_units
,
8440 dwarf2_per_objfile
);
8444 /* Compute the 'user' field for each psymtab in DWARF2_PER_OBJFILE. */
8447 set_partial_user (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8449 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8451 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
8456 for (int j
= 0; j
< pst
->number_of_dependencies
; ++j
)
8458 /* Set the 'user' field only if it is not already set. */
8459 if (pst
->dependencies
[j
]->user
== NULL
)
8460 pst
->dependencies
[j
]->user
= pst
;
8465 /* Build the partial symbol table by doing a quick pass through the
8466 .debug_info and .debug_abbrev sections. */
8469 dwarf2_build_psymtabs_hard (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8471 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8473 if (dwarf_read_debug
)
8475 fprintf_unfiltered (gdb_stdlog
, "Building psymtabs of objfile %s ...\n",
8476 objfile_name (objfile
));
8479 dwarf2_per_objfile
->reading_partial_symbols
= 1;
8481 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->info
);
8483 /* Any cached compilation units will be linked by the per-objfile
8484 read_in_chain. Make sure to free them when we're done. */
8485 free_cached_comp_units
freer (dwarf2_per_objfile
);
8487 build_type_psymtabs (dwarf2_per_objfile
);
8489 create_all_comp_units (dwarf2_per_objfile
);
8491 /* Create a temporary address map on a temporary obstack. We later
8492 copy this to the final obstack. */
8493 auto_obstack temp_obstack
;
8495 scoped_restore save_psymtabs_addrmap
8496 = make_scoped_restore (&objfile
->partial_symtabs
->psymtabs_addrmap
,
8497 addrmap_create_mutable (&temp_obstack
));
8499 for (dwarf2_per_cu_data
*per_cu
: dwarf2_per_objfile
->all_comp_units
)
8500 process_psymtab_comp_unit (per_cu
, 0, language_minimal
);
8502 /* This has to wait until we read the CUs, we need the list of DWOs. */
8503 process_skeletonless_type_units (dwarf2_per_objfile
);
8505 /* Now that all TUs have been processed we can fill in the dependencies. */
8506 if (dwarf2_per_objfile
->type_unit_groups
!= NULL
)
8508 htab_traverse_noresize (dwarf2_per_objfile
->type_unit_groups
,
8509 build_type_psymtab_dependencies
, dwarf2_per_objfile
);
8512 if (dwarf_read_debug
)
8513 print_tu_stats (dwarf2_per_objfile
);
8515 set_partial_user (dwarf2_per_objfile
);
8517 objfile
->partial_symtabs
->psymtabs_addrmap
8518 = addrmap_create_fixed (objfile
->partial_symtabs
->psymtabs_addrmap
,
8519 objfile
->partial_symtabs
->obstack ());
8520 /* At this point we want to keep the address map. */
8521 save_psymtabs_addrmap
.release ();
8523 if (dwarf_read_debug
)
8524 fprintf_unfiltered (gdb_stdlog
, "Done building psymtabs of %s\n",
8525 objfile_name (objfile
));
8528 /* die_reader_func for load_partial_comp_unit. */
8531 load_partial_comp_unit_reader (const struct die_reader_specs
*reader
,
8532 const gdb_byte
*info_ptr
,
8533 struct die_info
*comp_unit_die
,
8537 struct dwarf2_cu
*cu
= reader
->cu
;
8539 prepare_one_comp_unit (cu
, comp_unit_die
, language_minimal
);
8541 /* Check if comp unit has_children.
8542 If so, read the rest of the partial symbols from this comp unit.
8543 If not, there's no more debug_info for this comp unit. */
8545 load_partial_dies (reader
, info_ptr
, 0);
8548 /* Load the partial DIEs for a secondary CU into memory.
8549 This is also used when rereading a primary CU with load_all_dies. */
8552 load_partial_comp_unit (struct dwarf2_per_cu_data
*this_cu
)
8554 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1, false,
8555 load_partial_comp_unit_reader
, NULL
);
8559 read_comp_units_from_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
8560 struct dwarf2_section_info
*section
,
8561 struct dwarf2_section_info
*abbrev_section
,
8562 unsigned int is_dwz
)
8564 const gdb_byte
*info_ptr
;
8565 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8567 if (dwarf_read_debug
)
8568 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s\n",
8569 get_section_name (section
),
8570 get_section_file_name (section
));
8572 dwarf2_read_section (objfile
, section
);
8574 info_ptr
= section
->buffer
;
8576 while (info_ptr
< section
->buffer
+ section
->size
)
8578 struct dwarf2_per_cu_data
*this_cu
;
8580 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
->buffer
);
8582 comp_unit_head cu_header
;
8583 read_and_check_comp_unit_head (dwarf2_per_objfile
, &cu_header
, section
,
8584 abbrev_section
, info_ptr
,
8585 rcuh_kind::COMPILE
);
8587 /* Save the compilation unit for later lookup. */
8588 if (cu_header
.unit_type
!= DW_UT_type
)
8590 this_cu
= XOBNEW (&objfile
->objfile_obstack
,
8591 struct dwarf2_per_cu_data
);
8592 memset (this_cu
, 0, sizeof (*this_cu
));
8596 auto sig_type
= XOBNEW (&objfile
->objfile_obstack
,
8597 struct signatured_type
);
8598 memset (sig_type
, 0, sizeof (*sig_type
));
8599 sig_type
->signature
= cu_header
.signature
;
8600 sig_type
->type_offset_in_tu
= cu_header
.type_cu_offset_in_tu
;
8601 this_cu
= &sig_type
->per_cu
;
8603 this_cu
->is_debug_types
= (cu_header
.unit_type
== DW_UT_type
);
8604 this_cu
->sect_off
= sect_off
;
8605 this_cu
->length
= cu_header
.length
+ cu_header
.initial_length_size
;
8606 this_cu
->is_dwz
= is_dwz
;
8607 this_cu
->dwarf2_per_objfile
= dwarf2_per_objfile
;
8608 this_cu
->section
= section
;
8610 dwarf2_per_objfile
->all_comp_units
.push_back (this_cu
);
8612 info_ptr
= info_ptr
+ this_cu
->length
;
8616 /* Create a list of all compilation units in OBJFILE.
8617 This is only done for -readnow and building partial symtabs. */
8620 create_all_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
8622 gdb_assert (dwarf2_per_objfile
->all_comp_units
.empty ());
8623 read_comp_units_from_section (dwarf2_per_objfile
, &dwarf2_per_objfile
->info
,
8624 &dwarf2_per_objfile
->abbrev
, 0);
8626 dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
8628 read_comp_units_from_section (dwarf2_per_objfile
, &dwz
->info
, &dwz
->abbrev
,
8632 /* Process all loaded DIEs for compilation unit CU, starting at
8633 FIRST_DIE. The caller should pass SET_ADDRMAP == 1 if the compilation
8634 unit DIE did not have PC info (DW_AT_low_pc and DW_AT_high_pc, or
8635 DW_AT_ranges). See the comments of add_partial_subprogram on how
8636 SET_ADDRMAP is used and how *LOWPC and *HIGHPC are updated. */
8639 scan_partial_symbols (struct partial_die_info
*first_die
, CORE_ADDR
*lowpc
,
8640 CORE_ADDR
*highpc
, int set_addrmap
,
8641 struct dwarf2_cu
*cu
)
8643 struct partial_die_info
*pdi
;
8645 /* Now, march along the PDI's, descending into ones which have
8646 interesting children but skipping the children of the other ones,
8647 until we reach the end of the compilation unit. */
8655 /* Anonymous namespaces or modules have no name but have interesting
8656 children, so we need to look at them. Ditto for anonymous
8659 if (pdi
->name
!= NULL
|| pdi
->tag
== DW_TAG_namespace
8660 || pdi
->tag
== DW_TAG_module
|| pdi
->tag
== DW_TAG_enumeration_type
8661 || pdi
->tag
== DW_TAG_imported_unit
8662 || pdi
->tag
== DW_TAG_inlined_subroutine
)
8666 case DW_TAG_subprogram
:
8667 case DW_TAG_inlined_subroutine
:
8668 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8670 case DW_TAG_constant
:
8671 case DW_TAG_variable
:
8672 case DW_TAG_typedef
:
8673 case DW_TAG_union_type
:
8674 if (!pdi
->is_declaration
)
8676 add_partial_symbol (pdi
, cu
);
8679 case DW_TAG_class_type
:
8680 case DW_TAG_interface_type
:
8681 case DW_TAG_structure_type
:
8682 if (!pdi
->is_declaration
)
8684 add_partial_symbol (pdi
, cu
);
8686 if ((cu
->language
== language_rust
8687 || cu
->language
== language_cplus
) && pdi
->has_children
)
8688 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
,
8691 case DW_TAG_enumeration_type
:
8692 if (!pdi
->is_declaration
)
8693 add_partial_enumeration (pdi
, cu
);
8695 case DW_TAG_base_type
:
8696 case DW_TAG_subrange_type
:
8697 /* File scope base type definitions are added to the partial
8699 add_partial_symbol (pdi
, cu
);
8701 case DW_TAG_namespace
:
8702 add_partial_namespace (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8705 add_partial_module (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
8707 case DW_TAG_imported_unit
:
8709 struct dwarf2_per_cu_data
*per_cu
;
8711 /* For now we don't handle imported units in type units. */
8712 if (cu
->per_cu
->is_debug_types
)
8714 error (_("Dwarf Error: DW_TAG_imported_unit is not"
8715 " supported in type units [in module %s]"),
8716 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
8719 per_cu
= dwarf2_find_containing_comp_unit
8720 (pdi
->d
.sect_off
, pdi
->is_dwz
,
8721 cu
->per_cu
->dwarf2_per_objfile
);
8723 /* Go read the partial unit, if needed. */
8724 if (per_cu
->v
.psymtab
== NULL
)
8725 process_psymtab_comp_unit (per_cu
, 1, cu
->language
);
8727 VEC_safe_push (dwarf2_per_cu_ptr
,
8728 cu
->per_cu
->imported_symtabs
, per_cu
);
8731 case DW_TAG_imported_declaration
:
8732 add_partial_symbol (pdi
, cu
);
8739 /* If the die has a sibling, skip to the sibling. */
8741 pdi
= pdi
->die_sibling
;
8745 /* Functions used to compute the fully scoped name of a partial DIE.
8747 Normally, this is simple. For C++, the parent DIE's fully scoped
8748 name is concatenated with "::" and the partial DIE's name.
8749 Enumerators are an exception; they use the scope of their parent
8750 enumeration type, i.e. the name of the enumeration type is not
8751 prepended to the enumerator.
8753 There are two complexities. One is DW_AT_specification; in this
8754 case "parent" means the parent of the target of the specification,
8755 instead of the direct parent of the DIE. The other is compilers
8756 which do not emit DW_TAG_namespace; in this case we try to guess
8757 the fully qualified name of structure types from their members'
8758 linkage names. This must be done using the DIE's children rather
8759 than the children of any DW_AT_specification target. We only need
8760 to do this for structures at the top level, i.e. if the target of
8761 any DW_AT_specification (if any; otherwise the DIE itself) does not
8764 /* Compute the scope prefix associated with PDI's parent, in
8765 compilation unit CU. The result will be allocated on CU's
8766 comp_unit_obstack, or a copy of the already allocated PDI->NAME
8767 field. NULL is returned if no prefix is necessary. */
8769 partial_die_parent_scope (struct partial_die_info
*pdi
,
8770 struct dwarf2_cu
*cu
)
8772 const char *grandparent_scope
;
8773 struct partial_die_info
*parent
, *real_pdi
;
8775 /* We need to look at our parent DIE; if we have a DW_AT_specification,
8776 then this means the parent of the specification DIE. */
8779 while (real_pdi
->has_specification
)
8781 auto res
= find_partial_die (real_pdi
->spec_offset
,
8782 real_pdi
->spec_is_dwz
, cu
);
8787 parent
= real_pdi
->die_parent
;
8791 if (parent
->scope_set
)
8792 return parent
->scope
;
8796 grandparent_scope
= partial_die_parent_scope (parent
, cu
);
8798 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
8799 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
8800 Work around this problem here. */
8801 if (cu
->language
== language_cplus
8802 && parent
->tag
== DW_TAG_namespace
8803 && strcmp (parent
->name
, "::") == 0
8804 && grandparent_scope
== NULL
)
8806 parent
->scope
= NULL
;
8807 parent
->scope_set
= 1;
8811 if (pdi
->tag
== DW_TAG_enumerator
)
8812 /* Enumerators should not get the name of the enumeration as a prefix. */
8813 parent
->scope
= grandparent_scope
;
8814 else if (parent
->tag
== DW_TAG_namespace
8815 || parent
->tag
== DW_TAG_module
8816 || parent
->tag
== DW_TAG_structure_type
8817 || parent
->tag
== DW_TAG_class_type
8818 || parent
->tag
== DW_TAG_interface_type
8819 || parent
->tag
== DW_TAG_union_type
8820 || parent
->tag
== DW_TAG_enumeration_type
)
8822 if (grandparent_scope
== NULL
)
8823 parent
->scope
= parent
->name
;
8825 parent
->scope
= typename_concat (&cu
->comp_unit_obstack
,
8827 parent
->name
, 0, cu
);
8831 /* FIXME drow/2004-04-01: What should we be doing with
8832 function-local names? For partial symbols, we should probably be
8834 complaint (_("unhandled containing DIE tag %d for DIE at %s"),
8835 parent
->tag
, sect_offset_str (pdi
->sect_off
));
8836 parent
->scope
= grandparent_scope
;
8839 parent
->scope_set
= 1;
8840 return parent
->scope
;
8843 /* Return the fully scoped name associated with PDI, from compilation unit
8844 CU. The result will be allocated with malloc. */
8847 partial_die_full_name (struct partial_die_info
*pdi
,
8848 struct dwarf2_cu
*cu
)
8850 const char *parent_scope
;
8852 /* If this is a template instantiation, we can not work out the
8853 template arguments from partial DIEs. So, unfortunately, we have
8854 to go through the full DIEs. At least any work we do building
8855 types here will be reused if full symbols are loaded later. */
8856 if (pdi
->has_template_arguments
)
8860 if (pdi
->name
!= NULL
&& strchr (pdi
->name
, '<') == NULL
)
8862 struct die_info
*die
;
8863 struct attribute attr
;
8864 struct dwarf2_cu
*ref_cu
= cu
;
8866 /* DW_FORM_ref_addr is using section offset. */
8867 attr
.name
= (enum dwarf_attribute
) 0;
8868 attr
.form
= DW_FORM_ref_addr
;
8869 attr
.u
.unsnd
= to_underlying (pdi
->sect_off
);
8870 die
= follow_die_ref (NULL
, &attr
, &ref_cu
);
8872 return xstrdup (dwarf2_full_name (NULL
, die
, ref_cu
));
8876 parent_scope
= partial_die_parent_scope (pdi
, cu
);
8877 if (parent_scope
== NULL
)
8880 return typename_concat (NULL
, parent_scope
, pdi
->name
, 0, cu
);
8884 add_partial_symbol (struct partial_die_info
*pdi
, struct dwarf2_cu
*cu
)
8886 struct dwarf2_per_objfile
*dwarf2_per_objfile
8887 = cu
->per_cu
->dwarf2_per_objfile
;
8888 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
8889 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
8891 const char *actual_name
= NULL
;
8893 char *built_actual_name
;
8895 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
8897 built_actual_name
= partial_die_full_name (pdi
, cu
);
8898 if (built_actual_name
!= NULL
)
8899 actual_name
= built_actual_name
;
8901 if (actual_name
== NULL
)
8902 actual_name
= pdi
->name
;
8906 case DW_TAG_inlined_subroutine
:
8907 case DW_TAG_subprogram
:
8908 addr
= (gdbarch_adjust_dwarf2_addr (gdbarch
, pdi
->lowpc
+ baseaddr
)
8910 if (pdi
->is_external
|| cu
->language
== language_ada
)
8912 /* brobecker/2007-12-26: Normally, only "external" DIEs are part
8913 of the global scope. But in Ada, we want to be able to access
8914 nested procedures globally. So all Ada subprograms are stored
8915 in the global scope. */
8916 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8917 built_actual_name
!= NULL
,
8918 VAR_DOMAIN
, LOC_BLOCK
,
8919 SECT_OFF_TEXT (objfile
),
8920 psymbol_placement::GLOBAL
,
8922 cu
->language
, objfile
);
8926 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8927 built_actual_name
!= NULL
,
8928 VAR_DOMAIN
, LOC_BLOCK
,
8929 SECT_OFF_TEXT (objfile
),
8930 psymbol_placement::STATIC
,
8931 addr
, cu
->language
, objfile
);
8934 if (pdi
->main_subprogram
&& actual_name
!= NULL
)
8935 set_objfile_main_name (objfile
, actual_name
, cu
->language
);
8937 case DW_TAG_constant
:
8938 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8939 built_actual_name
!= NULL
, VAR_DOMAIN
, LOC_STATIC
,
8940 -1, (pdi
->is_external
8941 ? psymbol_placement::GLOBAL
8942 : psymbol_placement::STATIC
),
8943 0, cu
->language
, objfile
);
8945 case DW_TAG_variable
:
8947 addr
= decode_locdesc (pdi
->d
.locdesc
, cu
);
8951 && !dwarf2_per_objfile
->has_section_at_zero
)
8953 /* A global or static variable may also have been stripped
8954 out by the linker if unused, in which case its address
8955 will be nullified; do not add such variables into partial
8956 symbol table then. */
8958 else if (pdi
->is_external
)
8961 Don't enter into the minimal symbol tables as there is
8962 a minimal symbol table entry from the ELF symbols already.
8963 Enter into partial symbol table if it has a location
8964 descriptor or a type.
8965 If the location descriptor is missing, new_symbol will create
8966 a LOC_UNRESOLVED symbol, the address of the variable will then
8967 be determined from the minimal symbol table whenever the variable
8969 The address for the partial symbol table entry is not
8970 used by GDB, but it comes in handy for debugging partial symbol
8973 if (pdi
->d
.locdesc
|| pdi
->has_type
)
8974 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8975 built_actual_name
!= NULL
,
8976 VAR_DOMAIN
, LOC_STATIC
,
8977 SECT_OFF_TEXT (objfile
),
8978 psymbol_placement::GLOBAL
,
8979 addr
, cu
->language
, objfile
);
8983 int has_loc
= pdi
->d
.locdesc
!= NULL
;
8985 /* Static Variable. Skip symbols whose value we cannot know (those
8986 without location descriptors or constant values). */
8987 if (!has_loc
&& !pdi
->has_const_value
)
8989 xfree (built_actual_name
);
8993 add_psymbol_to_list (actual_name
, strlen (actual_name
),
8994 built_actual_name
!= NULL
,
8995 VAR_DOMAIN
, LOC_STATIC
,
8996 SECT_OFF_TEXT (objfile
),
8997 psymbol_placement::STATIC
,
8999 cu
->language
, objfile
);
9002 case DW_TAG_typedef
:
9003 case DW_TAG_base_type
:
9004 case DW_TAG_subrange_type
:
9005 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9006 built_actual_name
!= NULL
,
9007 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
9008 psymbol_placement::STATIC
,
9009 0, cu
->language
, objfile
);
9011 case DW_TAG_imported_declaration
:
9012 case DW_TAG_namespace
:
9013 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9014 built_actual_name
!= NULL
,
9015 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
9016 psymbol_placement::GLOBAL
,
9017 0, cu
->language
, objfile
);
9020 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9021 built_actual_name
!= NULL
,
9022 MODULE_DOMAIN
, LOC_TYPEDEF
, -1,
9023 psymbol_placement::GLOBAL
,
9024 0, cu
->language
, objfile
);
9026 case DW_TAG_class_type
:
9027 case DW_TAG_interface_type
:
9028 case DW_TAG_structure_type
:
9029 case DW_TAG_union_type
:
9030 case DW_TAG_enumeration_type
:
9031 /* Skip external references. The DWARF standard says in the section
9032 about "Structure, Union, and Class Type Entries": "An incomplete
9033 structure, union or class type is represented by a structure,
9034 union or class entry that does not have a byte size attribute
9035 and that has a DW_AT_declaration attribute." */
9036 if (!pdi
->has_byte_size
&& pdi
->is_declaration
)
9038 xfree (built_actual_name
);
9042 /* NOTE: carlton/2003-10-07: See comment in new_symbol about
9043 static vs. global. */
9044 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9045 built_actual_name
!= NULL
,
9046 STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
9047 cu
->language
== language_cplus
9048 ? psymbol_placement::GLOBAL
9049 : psymbol_placement::STATIC
,
9050 0, cu
->language
, objfile
);
9053 case DW_TAG_enumerator
:
9054 add_psymbol_to_list (actual_name
, strlen (actual_name
),
9055 built_actual_name
!= NULL
,
9056 VAR_DOMAIN
, LOC_CONST
, -1,
9057 cu
->language
== language_cplus
9058 ? psymbol_placement::GLOBAL
9059 : psymbol_placement::STATIC
,
9060 0, cu
->language
, objfile
);
9066 xfree (built_actual_name
);
9069 /* Read a partial die corresponding to a namespace; also, add a symbol
9070 corresponding to that namespace to the symbol table. NAMESPACE is
9071 the name of the enclosing namespace. */
9074 add_partial_namespace (struct partial_die_info
*pdi
,
9075 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9076 int set_addrmap
, struct dwarf2_cu
*cu
)
9078 /* Add a symbol for the namespace. */
9080 add_partial_symbol (pdi
, cu
);
9082 /* Now scan partial symbols in that namespace. */
9084 if (pdi
->has_children
)
9085 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9088 /* Read a partial die corresponding to a Fortran module. */
9091 add_partial_module (struct partial_die_info
*pdi
, CORE_ADDR
*lowpc
,
9092 CORE_ADDR
*highpc
, int set_addrmap
, struct dwarf2_cu
*cu
)
9094 /* Add a symbol for the namespace. */
9096 add_partial_symbol (pdi
, cu
);
9098 /* Now scan partial symbols in that module. */
9100 if (pdi
->has_children
)
9101 scan_partial_symbols (pdi
->die_child
, lowpc
, highpc
, set_addrmap
, cu
);
9104 /* Read a partial die corresponding to a subprogram or an inlined
9105 subprogram and create a partial symbol for that subprogram.
9106 When the CU language allows it, this routine also defines a partial
9107 symbol for each nested subprogram that this subprogram contains.
9108 If SET_ADDRMAP is true, record the covered ranges in the addrmap.
9109 Set *LOWPC and *HIGHPC to the lowest and highest PC values found in PDI.
9111 PDI may also be a lexical block, in which case we simply search
9112 recursively for subprograms defined inside that lexical block.
9113 Again, this is only performed when the CU language allows this
9114 type of definitions. */
9117 add_partial_subprogram (struct partial_die_info
*pdi
,
9118 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
9119 int set_addrmap
, struct dwarf2_cu
*cu
)
9121 if (pdi
->tag
== DW_TAG_subprogram
|| pdi
->tag
== DW_TAG_inlined_subroutine
)
9123 if (pdi
->has_pc_info
)
9125 if (pdi
->lowpc
< *lowpc
)
9126 *lowpc
= pdi
->lowpc
;
9127 if (pdi
->highpc
> *highpc
)
9128 *highpc
= pdi
->highpc
;
9131 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9132 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
9134 CORE_ADDR this_highpc
;
9135 CORE_ADDR this_lowpc
;
9137 baseaddr
= ANOFFSET (objfile
->section_offsets
,
9138 SECT_OFF_TEXT (objfile
));
9140 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
9141 pdi
->lowpc
+ baseaddr
)
9144 = (gdbarch_adjust_dwarf2_addr (gdbarch
,
9145 pdi
->highpc
+ baseaddr
)
9147 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
9148 this_lowpc
, this_highpc
- 1,
9149 cu
->per_cu
->v
.psymtab
);
9153 if (pdi
->has_pc_info
|| (!pdi
->is_external
&& pdi
->may_be_inlined
))
9155 if (!pdi
->is_declaration
)
9156 /* Ignore subprogram DIEs that do not have a name, they are
9157 illegal. Do not emit a complaint at this point, we will
9158 do so when we convert this psymtab into a symtab. */
9160 add_partial_symbol (pdi
, cu
);
9164 if (! pdi
->has_children
)
9167 if (cu
->language
== language_ada
)
9169 pdi
= pdi
->die_child
;
9173 if (pdi
->tag
== DW_TAG_subprogram
9174 || pdi
->tag
== DW_TAG_inlined_subroutine
9175 || pdi
->tag
== DW_TAG_lexical_block
)
9176 add_partial_subprogram (pdi
, lowpc
, highpc
, set_addrmap
, cu
);
9177 pdi
= pdi
->die_sibling
;
9182 /* Read a partial die corresponding to an enumeration type. */
9185 add_partial_enumeration (struct partial_die_info
*enum_pdi
,
9186 struct dwarf2_cu
*cu
)
9188 struct partial_die_info
*pdi
;
9190 if (enum_pdi
->name
!= NULL
)
9191 add_partial_symbol (enum_pdi
, cu
);
9193 pdi
= enum_pdi
->die_child
;
9196 if (pdi
->tag
!= DW_TAG_enumerator
|| pdi
->name
== NULL
)
9197 complaint (_("malformed enumerator DIE ignored"));
9199 add_partial_symbol (pdi
, cu
);
9200 pdi
= pdi
->die_sibling
;
9204 /* Return the initial uleb128 in the die at INFO_PTR. */
9207 peek_abbrev_code (bfd
*abfd
, const gdb_byte
*info_ptr
)
9209 unsigned int bytes_read
;
9211 return read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9214 /* Read the initial uleb128 in the die at INFO_PTR in compilation unit
9215 READER::CU. Use READER::ABBREV_TABLE to lookup any abbreviation.
9217 Return the corresponding abbrev, or NULL if the number is zero (indicating
9218 an empty DIE). In either case *BYTES_READ will be set to the length of
9219 the initial number. */
9221 static struct abbrev_info
*
9222 peek_die_abbrev (const die_reader_specs
&reader
,
9223 const gdb_byte
*info_ptr
, unsigned int *bytes_read
)
9225 dwarf2_cu
*cu
= reader
.cu
;
9226 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
9227 unsigned int abbrev_number
9228 = read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
9230 if (abbrev_number
== 0)
9233 abbrev_info
*abbrev
= reader
.abbrev_table
->lookup_abbrev (abbrev_number
);
9236 error (_("Dwarf Error: Could not find abbrev number %d in %s"
9237 " at offset %s [in module %s]"),
9238 abbrev_number
, cu
->per_cu
->is_debug_types
? "TU" : "CU",
9239 sect_offset_str (cu
->header
.sect_off
), bfd_get_filename (abfd
));
9245 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9246 Returns a pointer to the end of a series of DIEs, terminated by an empty
9247 DIE. Any children of the skipped DIEs will also be skipped. */
9249 static const gdb_byte
*
9250 skip_children (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
)
9254 unsigned int bytes_read
;
9255 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
9258 return info_ptr
+ bytes_read
;
9260 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
9264 /* Scan the debug information for CU starting at INFO_PTR in buffer BUFFER.
9265 INFO_PTR should point just after the initial uleb128 of a DIE, and the
9266 abbrev corresponding to that skipped uleb128 should be passed in
9267 ABBREV. Returns a pointer to this DIE's sibling, skipping any
9270 static const gdb_byte
*
9271 skip_one_die (const struct die_reader_specs
*reader
, const gdb_byte
*info_ptr
,
9272 struct abbrev_info
*abbrev
)
9274 unsigned int bytes_read
;
9275 struct attribute attr
;
9276 bfd
*abfd
= reader
->abfd
;
9277 struct dwarf2_cu
*cu
= reader
->cu
;
9278 const gdb_byte
*buffer
= reader
->buffer
;
9279 const gdb_byte
*buffer_end
= reader
->buffer_end
;
9280 unsigned int form
, i
;
9282 for (i
= 0; i
< abbrev
->num_attrs
; i
++)
9284 /* The only abbrev we care about is DW_AT_sibling. */
9285 if (abbrev
->attrs
[i
].name
== DW_AT_sibling
)
9287 read_attribute (reader
, &attr
, &abbrev
->attrs
[i
], info_ptr
);
9288 if (attr
.form
== DW_FORM_ref_addr
)
9289 complaint (_("ignoring absolute DW_AT_sibling"));
9292 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
9293 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
9295 if (sibling_ptr
< info_ptr
)
9296 complaint (_("DW_AT_sibling points backwards"));
9297 else if (sibling_ptr
> reader
->buffer_end
)
9298 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
9304 /* If it isn't DW_AT_sibling, skip this attribute. */
9305 form
= abbrev
->attrs
[i
].form
;
9309 case DW_FORM_ref_addr
:
9310 /* In DWARF 2, DW_FORM_ref_addr is address sized; in DWARF 3
9311 and later it is offset sized. */
9312 if (cu
->header
.version
== 2)
9313 info_ptr
+= cu
->header
.addr_size
;
9315 info_ptr
+= cu
->header
.offset_size
;
9317 case DW_FORM_GNU_ref_alt
:
9318 info_ptr
+= cu
->header
.offset_size
;
9321 info_ptr
+= cu
->header
.addr_size
;
9328 case DW_FORM_flag_present
:
9329 case DW_FORM_implicit_const
:
9341 case DW_FORM_ref_sig8
:
9344 case DW_FORM_data16
:
9347 case DW_FORM_string
:
9348 read_direct_string (abfd
, info_ptr
, &bytes_read
);
9349 info_ptr
+= bytes_read
;
9351 case DW_FORM_sec_offset
:
9353 case DW_FORM_GNU_strp_alt
:
9354 info_ptr
+= cu
->header
.offset_size
;
9356 case DW_FORM_exprloc
:
9358 info_ptr
+= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9359 info_ptr
+= bytes_read
;
9361 case DW_FORM_block1
:
9362 info_ptr
+= 1 + read_1_byte (abfd
, info_ptr
);
9364 case DW_FORM_block2
:
9365 info_ptr
+= 2 + read_2_bytes (abfd
, info_ptr
);
9367 case DW_FORM_block4
:
9368 info_ptr
+= 4 + read_4_bytes (abfd
, info_ptr
);
9374 case DW_FORM_ref_udata
:
9375 case DW_FORM_GNU_addr_index
:
9376 case DW_FORM_GNU_str_index
:
9377 info_ptr
= safe_skip_leb128 (info_ptr
, buffer_end
);
9379 case DW_FORM_indirect
:
9380 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
9381 info_ptr
+= bytes_read
;
9382 /* We need to continue parsing from here, so just go back to
9384 goto skip_attribute
;
9387 error (_("Dwarf Error: Cannot handle %s "
9388 "in DWARF reader [in module %s]"),
9389 dwarf_form_name (form
),
9390 bfd_get_filename (abfd
));
9394 if (abbrev
->has_children
)
9395 return skip_children (reader
, info_ptr
);
9400 /* Locate ORIG_PDI's sibling.
9401 INFO_PTR should point to the start of the next DIE after ORIG_PDI. */
9403 static const gdb_byte
*
9404 locate_pdi_sibling (const struct die_reader_specs
*reader
,
9405 struct partial_die_info
*orig_pdi
,
9406 const gdb_byte
*info_ptr
)
9408 /* Do we know the sibling already? */
9410 if (orig_pdi
->sibling
)
9411 return orig_pdi
->sibling
;
9413 /* Are there any children to deal with? */
9415 if (!orig_pdi
->has_children
)
9418 /* Skip the children the long way. */
9420 return skip_children (reader
, info_ptr
);
9423 /* Expand this partial symbol table into a full symbol table. SELF is
9427 dwarf2_read_symtab (struct partial_symtab
*self
,
9428 struct objfile
*objfile
)
9430 struct dwarf2_per_objfile
*dwarf2_per_objfile
9431 = get_dwarf2_per_objfile (objfile
);
9435 warning (_("bug: psymtab for %s is already read in."),
9442 printf_filtered (_("Reading in symbols for %s..."),
9444 gdb_flush (gdb_stdout
);
9447 /* If this psymtab is constructed from a debug-only objfile, the
9448 has_section_at_zero flag will not necessarily be correct. We
9449 can get the correct value for this flag by looking at the data
9450 associated with the (presumably stripped) associated objfile. */
9451 if (objfile
->separate_debug_objfile_backlink
)
9453 struct dwarf2_per_objfile
*dpo_backlink
9454 = get_dwarf2_per_objfile (objfile
->separate_debug_objfile_backlink
);
9456 dwarf2_per_objfile
->has_section_at_zero
9457 = dpo_backlink
->has_section_at_zero
;
9460 dwarf2_per_objfile
->reading_partial_symbols
= 0;
9462 psymtab_to_symtab_1 (self
);
9464 /* Finish up the debug error message. */
9466 printf_filtered (_("done.\n"));
9469 process_cu_includes (dwarf2_per_objfile
);
9472 /* Reading in full CUs. */
9474 /* Add PER_CU to the queue. */
9477 queue_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
9478 enum language pretend_language
)
9480 struct dwarf2_queue_item
*item
;
9483 item
= XNEW (struct dwarf2_queue_item
);
9484 item
->per_cu
= per_cu
;
9485 item
->pretend_language
= pretend_language
;
9488 if (dwarf2_queue
== NULL
)
9489 dwarf2_queue
= item
;
9491 dwarf2_queue_tail
->next
= item
;
9493 dwarf2_queue_tail
= item
;
9496 /* If PER_CU is not yet queued, add it to the queue.
9497 If DEPENDENT_CU is non-NULL, it has a reference to PER_CU so add a
9499 The result is non-zero if PER_CU was queued, otherwise the result is zero
9500 meaning either PER_CU is already queued or it is already loaded.
9502 N.B. There is an invariant here that if a CU is queued then it is loaded.
9503 The caller is required to load PER_CU if we return non-zero. */
9506 maybe_queue_comp_unit (struct dwarf2_cu
*dependent_cu
,
9507 struct dwarf2_per_cu_data
*per_cu
,
9508 enum language pretend_language
)
9510 /* We may arrive here during partial symbol reading, if we need full
9511 DIEs to process an unusual case (e.g. template arguments). Do
9512 not queue PER_CU, just tell our caller to load its DIEs. */
9513 if (per_cu
->dwarf2_per_objfile
->reading_partial_symbols
)
9515 if (per_cu
->cu
== NULL
|| per_cu
->cu
->dies
== NULL
)
9520 /* Mark the dependence relation so that we don't flush PER_CU
9522 if (dependent_cu
!= NULL
)
9523 dwarf2_add_dependence (dependent_cu
, per_cu
);
9525 /* If it's already on the queue, we have nothing to do. */
9529 /* If the compilation unit is already loaded, just mark it as
9531 if (per_cu
->cu
!= NULL
)
9533 per_cu
->cu
->last_used
= 0;
9537 /* Add it to the queue. */
9538 queue_comp_unit (per_cu
, pretend_language
);
9543 /* Process the queue. */
9546 process_queue (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
9548 struct dwarf2_queue_item
*item
, *next_item
;
9550 if (dwarf_read_debug
)
9552 fprintf_unfiltered (gdb_stdlog
,
9553 "Expanding one or more symtabs of objfile %s ...\n",
9554 objfile_name (dwarf2_per_objfile
->objfile
));
9557 /* The queue starts out with one item, but following a DIE reference
9558 may load a new CU, adding it to the end of the queue. */
9559 for (item
= dwarf2_queue
; item
!= NULL
; dwarf2_queue
= item
= next_item
)
9561 if ((dwarf2_per_objfile
->using_index
9562 ? !item
->per_cu
->v
.quick
->compunit_symtab
9563 : (item
->per_cu
->v
.psymtab
&& !item
->per_cu
->v
.psymtab
->readin
))
9564 /* Skip dummy CUs. */
9565 && item
->per_cu
->cu
!= NULL
)
9567 struct dwarf2_per_cu_data
*per_cu
= item
->per_cu
;
9568 unsigned int debug_print_threshold
;
9571 if (per_cu
->is_debug_types
)
9573 struct signatured_type
*sig_type
=
9574 (struct signatured_type
*) per_cu
;
9576 sprintf (buf
, "TU %s at offset %s",
9577 hex_string (sig_type
->signature
),
9578 sect_offset_str (per_cu
->sect_off
));
9579 /* There can be 100s of TUs.
9580 Only print them in verbose mode. */
9581 debug_print_threshold
= 2;
9585 sprintf (buf
, "CU at offset %s",
9586 sect_offset_str (per_cu
->sect_off
));
9587 debug_print_threshold
= 1;
9590 if (dwarf_read_debug
>= debug_print_threshold
)
9591 fprintf_unfiltered (gdb_stdlog
, "Expanding symtab of %s\n", buf
);
9593 if (per_cu
->is_debug_types
)
9594 process_full_type_unit (per_cu
, item
->pretend_language
);
9596 process_full_comp_unit (per_cu
, item
->pretend_language
);
9598 if (dwarf_read_debug
>= debug_print_threshold
)
9599 fprintf_unfiltered (gdb_stdlog
, "Done expanding %s\n", buf
);
9602 item
->per_cu
->queued
= 0;
9603 next_item
= item
->next
;
9607 dwarf2_queue_tail
= NULL
;
9609 if (dwarf_read_debug
)
9611 fprintf_unfiltered (gdb_stdlog
, "Done expanding symtabs of %s.\n",
9612 objfile_name (dwarf2_per_objfile
->objfile
));
9616 /* Read in full symbols for PST, and anything it depends on. */
9619 psymtab_to_symtab_1 (struct partial_symtab
*pst
)
9621 struct dwarf2_per_cu_data
*per_cu
;
9627 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
9628 if (!pst
->dependencies
[i
]->readin
9629 && pst
->dependencies
[i
]->user
== NULL
)
9631 /* Inform about additional files that need to be read in. */
9634 /* FIXME: i18n: Need to make this a single string. */
9635 fputs_filtered (" ", gdb_stdout
);
9637 fputs_filtered ("and ", gdb_stdout
);
9639 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
9640 wrap_here (""); /* Flush output. */
9641 gdb_flush (gdb_stdout
);
9643 psymtab_to_symtab_1 (pst
->dependencies
[i
]);
9646 per_cu
= (struct dwarf2_per_cu_data
*) pst
->read_symtab_private
;
9650 /* It's an include file, no symbols to read for it.
9651 Everything is in the parent symtab. */
9656 dw2_do_instantiate_symtab (per_cu
, false);
9659 /* Trivial hash function for die_info: the hash value of a DIE
9660 is its offset in .debug_info for this objfile. */
9663 die_hash (const void *item
)
9665 const struct die_info
*die
= (const struct die_info
*) item
;
9667 return to_underlying (die
->sect_off
);
9670 /* Trivial comparison function for die_info structures: two DIEs
9671 are equal if they have the same offset. */
9674 die_eq (const void *item_lhs
, const void *item_rhs
)
9676 const struct die_info
*die_lhs
= (const struct die_info
*) item_lhs
;
9677 const struct die_info
*die_rhs
= (const struct die_info
*) item_rhs
;
9679 return die_lhs
->sect_off
== die_rhs
->sect_off
;
9682 /* die_reader_func for load_full_comp_unit.
9683 This is identical to read_signatured_type_reader,
9684 but is kept separate for now. */
9687 load_full_comp_unit_reader (const struct die_reader_specs
*reader
,
9688 const gdb_byte
*info_ptr
,
9689 struct die_info
*comp_unit_die
,
9693 struct dwarf2_cu
*cu
= reader
->cu
;
9694 enum language
*language_ptr
= (enum language
*) data
;
9696 gdb_assert (cu
->die_hash
== NULL
);
9698 htab_create_alloc_ex (cu
->header
.length
/ 12,
9702 &cu
->comp_unit_obstack
,
9703 hashtab_obstack_allocate
,
9704 dummy_obstack_deallocate
);
9707 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
9708 &info_ptr
, comp_unit_die
);
9709 cu
->dies
= comp_unit_die
;
9710 /* comp_unit_die is not stored in die_hash, no need. */
9712 /* We try not to read any attributes in this function, because not
9713 all CUs needed for references have been loaded yet, and symbol
9714 table processing isn't initialized. But we have to set the CU language,
9715 or we won't be able to build types correctly.
9716 Similarly, if we do not read the producer, we can not apply
9717 producer-specific interpretation. */
9718 prepare_one_comp_unit (cu
, cu
->dies
, *language_ptr
);
9721 /* Load the DIEs associated with PER_CU into memory. */
9724 load_full_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
9726 enum language pretend_language
)
9728 gdb_assert (! this_cu
->is_debug_types
);
9730 init_cutu_and_read_dies (this_cu
, NULL
, 1, 1, skip_partial
,
9731 load_full_comp_unit_reader
, &pretend_language
);
9734 /* Add a DIE to the delayed physname list. */
9737 add_to_method_list (struct type
*type
, int fnfield_index
, int index
,
9738 const char *name
, struct die_info
*die
,
9739 struct dwarf2_cu
*cu
)
9741 struct delayed_method_info mi
;
9743 mi
.fnfield_index
= fnfield_index
;
9747 cu
->method_list
.push_back (mi
);
9750 /* Check whether [PHYSNAME, PHYSNAME+LEN) ends with a modifier like
9751 "const" / "volatile". If so, decrements LEN by the length of the
9752 modifier and return true. Otherwise return false. */
9756 check_modifier (const char *physname
, size_t &len
, const char (&mod
)[N
])
9758 size_t mod_len
= sizeof (mod
) - 1;
9759 if (len
> mod_len
&& startswith (physname
+ (len
- mod_len
), mod
))
9767 /* Compute the physnames of any methods on the CU's method list.
9769 The computation of method physnames is delayed in order to avoid the
9770 (bad) condition that one of the method's formal parameters is of an as yet
9774 compute_delayed_physnames (struct dwarf2_cu
*cu
)
9776 /* Only C++ delays computing physnames. */
9777 if (cu
->method_list
.empty ())
9779 gdb_assert (cu
->language
== language_cplus
);
9781 for (const delayed_method_info
&mi
: cu
->method_list
)
9783 const char *physname
;
9784 struct fn_fieldlist
*fn_flp
9785 = &TYPE_FN_FIELDLIST (mi
.type
, mi
.fnfield_index
);
9786 physname
= dwarf2_physname (mi
.name
, mi
.die
, cu
);
9787 TYPE_FN_FIELD_PHYSNAME (fn_flp
->fn_fields
, mi
.index
)
9788 = physname
? physname
: "";
9790 /* Since there's no tag to indicate whether a method is a
9791 const/volatile overload, extract that information out of the
9793 if (physname
!= NULL
)
9795 size_t len
= strlen (physname
);
9799 if (physname
[len
] == ')') /* shortcut */
9801 else if (check_modifier (physname
, len
, " const"))
9802 TYPE_FN_FIELD_CONST (fn_flp
->fn_fields
, mi
.index
) = 1;
9803 else if (check_modifier (physname
, len
, " volatile"))
9804 TYPE_FN_FIELD_VOLATILE (fn_flp
->fn_fields
, mi
.index
) = 1;
9811 /* The list is no longer needed. */
9812 cu
->method_list
.clear ();
9815 /* Go objects should be embedded in a DW_TAG_module DIE,
9816 and it's not clear if/how imported objects will appear.
9817 To keep Go support simple until that's worked out,
9818 go back through what we've read and create something usable.
9819 We could do this while processing each DIE, and feels kinda cleaner,
9820 but that way is more invasive.
9821 This is to, for example, allow the user to type "p var" or "b main"
9822 without having to specify the package name, and allow lookups
9823 of module.object to work in contexts that use the expression
9827 fixup_go_packaging (struct dwarf2_cu
*cu
)
9829 char *package_name
= NULL
;
9830 struct pending
*list
;
9833 for (list
= *cu
->get_builder ()->get_global_symbols ();
9837 for (i
= 0; i
< list
->nsyms
; ++i
)
9839 struct symbol
*sym
= list
->symbol
[i
];
9841 if (SYMBOL_LANGUAGE (sym
) == language_go
9842 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
9844 char *this_package_name
= go_symbol_package_name (sym
);
9846 if (this_package_name
== NULL
)
9848 if (package_name
== NULL
)
9849 package_name
= this_package_name
;
9852 struct objfile
*objfile
9853 = cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9854 if (strcmp (package_name
, this_package_name
) != 0)
9855 complaint (_("Symtab %s has objects from two different Go packages: %s and %s"),
9856 (symbol_symtab (sym
) != NULL
9857 ? symtab_to_filename_for_display
9858 (symbol_symtab (sym
))
9859 : objfile_name (objfile
)),
9860 this_package_name
, package_name
);
9861 xfree (this_package_name
);
9867 if (package_name
!= NULL
)
9869 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
9870 const char *saved_package_name
9871 = (const char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
9873 strlen (package_name
));
9874 struct type
*type
= init_type (objfile
, TYPE_CODE_MODULE
, 0,
9875 saved_package_name
);
9878 sym
= allocate_symbol (objfile
);
9879 SYMBOL_SET_LANGUAGE (sym
, language_go
, &objfile
->objfile_obstack
);
9880 SYMBOL_SET_NAMES (sym
, saved_package_name
,
9881 strlen (saved_package_name
), 0, objfile
);
9882 /* This is not VAR_DOMAIN because we want a way to ensure a lookup of,
9883 e.g., "main" finds the "main" module and not C's main(). */
9884 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
9885 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
9886 SYMBOL_TYPE (sym
) = type
;
9888 add_symbol_to_list (sym
, cu
->get_builder ()->get_global_symbols ());
9890 xfree (package_name
);
9894 /* Allocate a fully-qualified name consisting of the two parts on the
9898 rust_fully_qualify (struct obstack
*obstack
, const char *p1
, const char *p2
)
9900 return obconcat (obstack
, p1
, "::", p2
, (char *) NULL
);
9903 /* A helper that allocates a struct discriminant_info to attach to a
9906 static struct discriminant_info
*
9907 alloc_discriminant_info (struct type
*type
, int discriminant_index
,
9910 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9911 gdb_assert (discriminant_index
== -1
9912 || (discriminant_index
>= 0
9913 && discriminant_index
< TYPE_NFIELDS (type
)));
9914 gdb_assert (default_index
== -1
9915 || (default_index
>= 0 && default_index
< TYPE_NFIELDS (type
)));
9917 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
9919 struct discriminant_info
*disc
9920 = ((struct discriminant_info
*)
9922 offsetof (struct discriminant_info
, discriminants
)
9923 + TYPE_NFIELDS (type
) * sizeof (disc
->discriminants
[0])));
9924 disc
->default_index
= default_index
;
9925 disc
->discriminant_index
= discriminant_index
;
9927 struct dynamic_prop prop
;
9928 prop
.kind
= PROP_UNDEFINED
;
9929 prop
.data
.baton
= disc
;
9931 add_dyn_prop (DYN_PROP_DISCRIMINATED
, prop
, type
);
9936 /* Some versions of rustc emitted enums in an unusual way.
9938 Ordinary enums were emitted as unions. The first element of each
9939 structure in the union was named "RUST$ENUM$DISR". This element
9940 held the discriminant.
9942 These versions of Rust also implemented the "non-zero"
9943 optimization. When the enum had two values, and one is empty and
9944 the other holds a pointer that cannot be zero, the pointer is used
9945 as the discriminant, with a zero value meaning the empty variant.
9946 Here, the union's first member is of the form
9947 RUST$ENCODED$ENUM$<fieldno>$<fieldno>$...$<variantname>
9948 where the fieldnos are the indices of the fields that should be
9949 traversed in order to find the field (which may be several fields deep)
9950 and the variantname is the name of the variant of the case when the
9953 This function recognizes whether TYPE is of one of these forms,
9954 and, if so, smashes it to be a variant type. */
9957 quirk_rust_enum (struct type
*type
, struct objfile
*objfile
)
9959 gdb_assert (TYPE_CODE (type
) == TYPE_CODE_UNION
);
9961 /* We don't need to deal with empty enums. */
9962 if (TYPE_NFIELDS (type
) == 0)
9965 #define RUST_ENUM_PREFIX "RUST$ENCODED$ENUM$"
9966 if (TYPE_NFIELDS (type
) == 1
9967 && startswith (TYPE_FIELD_NAME (type
, 0), RUST_ENUM_PREFIX
))
9969 const char *name
= TYPE_FIELD_NAME (type
, 0) + strlen (RUST_ENUM_PREFIX
);
9971 /* Decode the field name to find the offset of the
9973 ULONGEST bit_offset
= 0;
9974 struct type
*field_type
= TYPE_FIELD_TYPE (type
, 0);
9975 while (name
[0] >= '0' && name
[0] <= '9')
9978 unsigned long index
= strtoul (name
, &tail
, 10);
9981 || index
>= TYPE_NFIELDS (field_type
)
9982 || (TYPE_FIELD_LOC_KIND (field_type
, index
)
9983 != FIELD_LOC_KIND_BITPOS
))
9985 complaint (_("Could not parse Rust enum encoding string \"%s\""
9987 TYPE_FIELD_NAME (type
, 0),
9988 objfile_name (objfile
));
9993 bit_offset
+= TYPE_FIELD_BITPOS (field_type
, index
);
9994 field_type
= TYPE_FIELD_TYPE (field_type
, index
);
9997 /* Make a union to hold the variants. */
9998 struct type
*union_type
= alloc_type (objfile
);
9999 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10000 TYPE_NFIELDS (union_type
) = 3;
10001 TYPE_FIELDS (union_type
)
10002 = (struct field
*) TYPE_ZALLOC (type
, 3 * sizeof (struct field
));
10003 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10004 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
10006 /* Put the discriminant must at index 0. */
10007 TYPE_FIELD_TYPE (union_type
, 0) = field_type
;
10008 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
10009 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
10010 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 0), bit_offset
);
10012 /* The order of fields doesn't really matter, so put the real
10013 field at index 1 and the data-less field at index 2. */
10014 struct discriminant_info
*disc
10015 = alloc_discriminant_info (union_type
, 0, 1);
10016 TYPE_FIELD (union_type
, 1) = TYPE_FIELD (type
, 0);
10017 TYPE_FIELD_NAME (union_type
, 1)
10018 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1)));
10019 TYPE_NAME (TYPE_FIELD_TYPE (union_type
, 1))
10020 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
10021 TYPE_FIELD_NAME (union_type
, 1));
10023 const char *dataless_name
10024 = rust_fully_qualify (&objfile
->objfile_obstack
, TYPE_NAME (type
),
10026 struct type
*dataless_type
= init_type (objfile
, TYPE_CODE_VOID
, 0,
10028 TYPE_FIELD_TYPE (union_type
, 2) = dataless_type
;
10029 /* NAME points into the original discriminant name, which
10030 already has the correct lifetime. */
10031 TYPE_FIELD_NAME (union_type
, 2) = name
;
10032 SET_FIELD_BITPOS (TYPE_FIELD (union_type
, 2), 0);
10033 disc
->discriminants
[2] = 0;
10035 /* Smash this type to be a structure type. We have to do this
10036 because the type has already been recorded. */
10037 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10038 TYPE_NFIELDS (type
) = 1;
10040 = (struct field
*) TYPE_ZALLOC (type
, sizeof (struct field
));
10042 /* Install the variant part. */
10043 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10044 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10045 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10047 else if (TYPE_NFIELDS (type
) == 1)
10049 /* We assume that a union with a single field is a univariant
10051 /* Smash this type to be a structure type. We have to do this
10052 because the type has already been recorded. */
10053 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10055 /* Make a union to hold the variants. */
10056 struct type
*union_type
= alloc_type (objfile
);
10057 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10058 TYPE_NFIELDS (union_type
) = TYPE_NFIELDS (type
);
10059 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10060 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
10061 TYPE_FIELDS (union_type
) = TYPE_FIELDS (type
);
10063 struct type
*field_type
= TYPE_FIELD_TYPE (union_type
, 0);
10064 const char *variant_name
10065 = rust_last_path_segment (TYPE_NAME (field_type
));
10066 TYPE_FIELD_NAME (union_type
, 0) = variant_name
;
10067 TYPE_NAME (field_type
)
10068 = rust_fully_qualify (&objfile
->objfile_obstack
,
10069 TYPE_NAME (type
), variant_name
);
10071 /* Install the union in the outer struct type. */
10072 TYPE_NFIELDS (type
) = 1;
10074 = (struct field
*) TYPE_ZALLOC (union_type
, sizeof (struct field
));
10075 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10076 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10077 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10079 alloc_discriminant_info (union_type
, -1, 0);
10083 struct type
*disr_type
= nullptr;
10084 for (int i
= 0; i
< TYPE_NFIELDS (type
); ++i
)
10086 disr_type
= TYPE_FIELD_TYPE (type
, i
);
10088 if (TYPE_CODE (disr_type
) != TYPE_CODE_STRUCT
)
10090 /* All fields of a true enum will be structs. */
10093 else if (TYPE_NFIELDS (disr_type
) == 0)
10095 /* Could be data-less variant, so keep going. */
10096 disr_type
= nullptr;
10098 else if (strcmp (TYPE_FIELD_NAME (disr_type
, 0),
10099 "RUST$ENUM$DISR") != 0)
10101 /* Not a Rust enum. */
10111 /* If we got here without a discriminant, then it's probably
10113 if (disr_type
== nullptr)
10116 /* Smash this type to be a structure type. We have to do this
10117 because the type has already been recorded. */
10118 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
10120 /* Make a union to hold the variants. */
10121 struct field
*disr_field
= &TYPE_FIELD (disr_type
, 0);
10122 struct type
*union_type
= alloc_type (objfile
);
10123 TYPE_CODE (union_type
) = TYPE_CODE_UNION
;
10124 TYPE_NFIELDS (union_type
) = 1 + TYPE_NFIELDS (type
);
10125 TYPE_LENGTH (union_type
) = TYPE_LENGTH (type
);
10126 set_type_align (union_type
, TYPE_RAW_ALIGN (type
));
10127 TYPE_FIELDS (union_type
)
10128 = (struct field
*) TYPE_ZALLOC (union_type
,
10129 (TYPE_NFIELDS (union_type
)
10130 * sizeof (struct field
)));
10132 memcpy (TYPE_FIELDS (union_type
) + 1, TYPE_FIELDS (type
),
10133 TYPE_NFIELDS (type
) * sizeof (struct field
));
10135 /* Install the discriminant at index 0 in the union. */
10136 TYPE_FIELD (union_type
, 0) = *disr_field
;
10137 TYPE_FIELD_ARTIFICIAL (union_type
, 0) = 1;
10138 TYPE_FIELD_NAME (union_type
, 0) = "<<discriminant>>";
10140 /* Install the union in the outer struct type. */
10141 TYPE_FIELD_TYPE (type
, 0) = union_type
;
10142 TYPE_FIELD_NAME (type
, 0) = "<<variants>>";
10143 TYPE_NFIELDS (type
) = 1;
10145 /* Set the size and offset of the union type. */
10146 SET_FIELD_BITPOS (TYPE_FIELD (type
, 0), 0);
10148 /* We need a way to find the correct discriminant given a
10149 variant name. For convenience we build a map here. */
10150 struct type
*enum_type
= FIELD_TYPE (*disr_field
);
10151 std::unordered_map
<std::string
, ULONGEST
> discriminant_map
;
10152 for (int i
= 0; i
< TYPE_NFIELDS (enum_type
); ++i
)
10154 if (TYPE_FIELD_LOC_KIND (enum_type
, i
) == FIELD_LOC_KIND_ENUMVAL
)
10157 = rust_last_path_segment (TYPE_FIELD_NAME (enum_type
, i
));
10158 discriminant_map
[name
] = TYPE_FIELD_ENUMVAL (enum_type
, i
);
10162 int n_fields
= TYPE_NFIELDS (union_type
);
10163 struct discriminant_info
*disc
10164 = alloc_discriminant_info (union_type
, 0, -1);
10165 /* Skip the discriminant here. */
10166 for (int i
= 1; i
< n_fields
; ++i
)
10168 /* Find the final word in the name of this variant's type.
10169 That name can be used to look up the correct
10171 const char *variant_name
10172 = rust_last_path_segment (TYPE_NAME (TYPE_FIELD_TYPE (union_type
,
10175 auto iter
= discriminant_map
.find (variant_name
);
10176 if (iter
!= discriminant_map
.end ())
10177 disc
->discriminants
[i
] = iter
->second
;
10179 /* Remove the discriminant field, if it exists. */
10180 struct type
*sub_type
= TYPE_FIELD_TYPE (union_type
, i
);
10181 if (TYPE_NFIELDS (sub_type
) > 0)
10183 --TYPE_NFIELDS (sub_type
);
10184 ++TYPE_FIELDS (sub_type
);
10186 TYPE_FIELD_NAME (union_type
, i
) = variant_name
;
10187 TYPE_NAME (sub_type
)
10188 = rust_fully_qualify (&objfile
->objfile_obstack
,
10189 TYPE_NAME (type
), variant_name
);
10194 /* Rewrite some Rust unions to be structures with variants parts. */
10197 rust_union_quirks (struct dwarf2_cu
*cu
)
10199 gdb_assert (cu
->language
== language_rust
);
10200 for (type
*type_
: cu
->rust_unions
)
10201 quirk_rust_enum (type_
, cu
->per_cu
->dwarf2_per_objfile
->objfile
);
10202 /* We don't need this any more. */
10203 cu
->rust_unions
.clear ();
10206 /* Return the symtab for PER_CU. This works properly regardless of
10207 whether we're using the index or psymtabs. */
10209 static struct compunit_symtab
*
10210 get_compunit_symtab (struct dwarf2_per_cu_data
*per_cu
)
10212 return (per_cu
->dwarf2_per_objfile
->using_index
10213 ? per_cu
->v
.quick
->compunit_symtab
10214 : per_cu
->v
.psymtab
->compunit_symtab
);
10217 /* A helper function for computing the list of all symbol tables
10218 included by PER_CU. */
10221 recursively_compute_inclusions (std::vector
<compunit_symtab
*> *result
,
10222 htab_t all_children
, htab_t all_type_symtabs
,
10223 struct dwarf2_per_cu_data
*per_cu
,
10224 struct compunit_symtab
*immediate_parent
)
10228 struct compunit_symtab
*cust
;
10229 struct dwarf2_per_cu_data
*iter
;
10231 slot
= htab_find_slot (all_children
, per_cu
, INSERT
);
10234 /* This inclusion and its children have been processed. */
10239 /* Only add a CU if it has a symbol table. */
10240 cust
= get_compunit_symtab (per_cu
);
10243 /* If this is a type unit only add its symbol table if we haven't
10244 seen it yet (type unit per_cu's can share symtabs). */
10245 if (per_cu
->is_debug_types
)
10247 slot
= htab_find_slot (all_type_symtabs
, cust
, INSERT
);
10251 result
->push_back (cust
);
10252 if (cust
->user
== NULL
)
10253 cust
->user
= immediate_parent
;
10258 result
->push_back (cust
);
10259 if (cust
->user
== NULL
)
10260 cust
->user
= immediate_parent
;
10265 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, ix
, iter
);
10268 recursively_compute_inclusions (result
, all_children
,
10269 all_type_symtabs
, iter
, cust
);
10273 /* Compute the compunit_symtab 'includes' fields for the compunit_symtab of
10277 compute_compunit_symtab_includes (struct dwarf2_per_cu_data
*per_cu
)
10279 gdb_assert (! per_cu
->is_debug_types
);
10281 if (!VEC_empty (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
))
10284 struct dwarf2_per_cu_data
*per_cu_iter
;
10285 std::vector
<compunit_symtab
*> result_symtabs
;
10286 htab_t all_children
, all_type_symtabs
;
10287 struct compunit_symtab
*cust
= get_compunit_symtab (per_cu
);
10289 /* If we don't have a symtab, we can just skip this case. */
10293 all_children
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10294 NULL
, xcalloc
, xfree
);
10295 all_type_symtabs
= htab_create_alloc (1, htab_hash_pointer
, htab_eq_pointer
,
10296 NULL
, xcalloc
, xfree
);
10299 VEC_iterate (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
,
10303 recursively_compute_inclusions (&result_symtabs
, all_children
,
10304 all_type_symtabs
, per_cu_iter
,
10308 /* Now we have a transitive closure of all the included symtabs. */
10309 len
= result_symtabs
.size ();
10311 = XOBNEWVEC (&per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
,
10312 struct compunit_symtab
*, len
+ 1);
10313 memcpy (cust
->includes
, result_symtabs
.data (),
10314 len
* sizeof (compunit_symtab
*));
10315 cust
->includes
[len
] = NULL
;
10317 htab_delete (all_children
);
10318 htab_delete (all_type_symtabs
);
10322 /* Compute the 'includes' field for the symtabs of all the CUs we just
10326 process_cu_includes (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
10328 for (dwarf2_per_cu_data
*iter
: dwarf2_per_objfile
->just_read_cus
)
10330 if (! iter
->is_debug_types
)
10331 compute_compunit_symtab_includes (iter
);
10334 dwarf2_per_objfile
->just_read_cus
.clear ();
10337 /* Generate full symbol information for PER_CU, whose DIEs have
10338 already been loaded into memory. */
10341 process_full_comp_unit (struct dwarf2_per_cu_data
*per_cu
,
10342 enum language pretend_language
)
10344 struct dwarf2_cu
*cu
= per_cu
->cu
;
10345 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10346 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10347 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
10348 CORE_ADDR lowpc
, highpc
;
10349 struct compunit_symtab
*cust
;
10350 CORE_ADDR baseaddr
;
10351 struct block
*static_block
;
10354 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
10356 /* Clear the list here in case something was left over. */
10357 cu
->method_list
.clear ();
10359 cu
->language
= pretend_language
;
10360 cu
->language_defn
= language_def (cu
->language
);
10362 /* Do line number decoding in read_file_scope () */
10363 process_die (cu
->dies
, cu
);
10365 /* For now fudge the Go package. */
10366 if (cu
->language
== language_go
)
10367 fixup_go_packaging (cu
);
10369 /* Now that we have processed all the DIEs in the CU, all the types
10370 should be complete, and it should now be safe to compute all of the
10372 compute_delayed_physnames (cu
);
10374 if (cu
->language
== language_rust
)
10375 rust_union_quirks (cu
);
10377 /* Some compilers don't define a DW_AT_high_pc attribute for the
10378 compilation unit. If the DW_AT_high_pc is missing, synthesize
10379 it, by scanning the DIE's below the compilation unit. */
10380 get_scope_pc_bounds (cu
->dies
, &lowpc
, &highpc
, cu
);
10382 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
10383 static_block
= cu
->get_builder ()->end_symtab_get_static_block (addr
, 0, 1);
10385 /* If the comp unit has DW_AT_ranges, it may have discontiguous ranges.
10386 Also, DW_AT_ranges may record ranges not belonging to any child DIEs
10387 (such as virtual method tables). Record the ranges in STATIC_BLOCK's
10388 addrmap to help ensure it has an accurate map of pc values belonging to
10390 dwarf2_record_block_ranges (cu
->dies
, static_block
, baseaddr
, cu
);
10392 cust
= cu
->get_builder ()->end_symtab_from_static_block (static_block
,
10393 SECT_OFF_TEXT (objfile
),
10398 int gcc_4_minor
= producer_is_gcc_ge_4 (cu
->producer
);
10400 /* Set symtab language to language from DW_AT_language. If the
10401 compilation is from a C file generated by language preprocessors, do
10402 not set the language if it was already deduced by start_subfile. */
10403 if (!(cu
->language
== language_c
10404 && COMPUNIT_FILETABS (cust
)->language
!= language_unknown
))
10405 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10407 /* GCC-4.0 has started to support -fvar-tracking. GCC-3.x still can
10408 produce DW_AT_location with location lists but it can be possibly
10409 invalid without -fvar-tracking. Still up to GCC-4.4.x incl. 4.4.0
10410 there were bugs in prologue debug info, fixed later in GCC-4.5
10411 by "unwind info for epilogues" patch (which is not directly related).
10413 For -gdwarf-4 type units LOCATIONS_VALID indication is fortunately not
10414 needed, it would be wrong due to missing DW_AT_producer there.
10416 Still one can confuse GDB by using non-standard GCC compilation
10417 options - this waits on GCC PR other/32998 (-frecord-gcc-switches).
10419 if (cu
->has_loclist
&& gcc_4_minor
>= 5)
10420 cust
->locations_valid
= 1;
10422 if (gcc_4_minor
>= 5)
10423 cust
->epilogue_unwind_valid
= 1;
10425 cust
->call_site_htab
= cu
->call_site_htab
;
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
;
10437 /* Push it for inclusion processing later. */
10438 dwarf2_per_objfile
->just_read_cus
.push_back (per_cu
);
10440 /* Not needed any more. */
10441 cu
->reset_builder ();
10444 /* Generate full symbol information for type unit PER_CU, whose DIEs have
10445 already been loaded into memory. */
10448 process_full_type_unit (struct dwarf2_per_cu_data
*per_cu
,
10449 enum language pretend_language
)
10451 struct dwarf2_cu
*cu
= per_cu
->cu
;
10452 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
10453 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
10454 struct compunit_symtab
*cust
;
10455 struct signatured_type
*sig_type
;
10457 gdb_assert (per_cu
->is_debug_types
);
10458 sig_type
= (struct signatured_type
*) per_cu
;
10460 /* Clear the list here in case something was left over. */
10461 cu
->method_list
.clear ();
10463 cu
->language
= pretend_language
;
10464 cu
->language_defn
= language_def (cu
->language
);
10466 /* The symbol tables are set up in read_type_unit_scope. */
10467 process_die (cu
->dies
, cu
);
10469 /* For now fudge the Go package. */
10470 if (cu
->language
== language_go
)
10471 fixup_go_packaging (cu
);
10473 /* Now that we have processed all the DIEs in the CU, all the types
10474 should be complete, and it should now be safe to compute all of the
10476 compute_delayed_physnames (cu
);
10478 if (cu
->language
== language_rust
)
10479 rust_union_quirks (cu
);
10481 /* TUs share symbol tables.
10482 If this is the first TU to use this symtab, complete the construction
10483 of it with end_expandable_symtab. Otherwise, complete the addition of
10484 this TU's symbols to the existing symtab. */
10485 if (sig_type
->type_unit_group
->compunit_symtab
== NULL
)
10487 buildsym_compunit
*builder
= cu
->get_builder ();
10488 cust
= builder
->end_expandable_symtab (0, SECT_OFF_TEXT (objfile
));
10489 sig_type
->type_unit_group
->compunit_symtab
= cust
;
10493 /* Set symtab language to language from DW_AT_language. If the
10494 compilation is from a C file generated by language preprocessors,
10495 do not set the language if it was already deduced by
10497 if (!(cu
->language
== language_c
10498 && COMPUNIT_FILETABS (cust
)->language
!= language_c
))
10499 COMPUNIT_FILETABS (cust
)->language
= cu
->language
;
10504 cu
->get_builder ()->augment_type_symtab ();
10505 cust
= sig_type
->type_unit_group
->compunit_symtab
;
10508 if (dwarf2_per_objfile
->using_index
)
10509 per_cu
->v
.quick
->compunit_symtab
= cust
;
10512 struct partial_symtab
*pst
= per_cu
->v
.psymtab
;
10513 pst
->compunit_symtab
= cust
;
10517 /* Not needed any more. */
10518 cu
->reset_builder ();
10521 /* Process an imported unit DIE. */
10524 process_imported_unit_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10526 struct attribute
*attr
;
10528 /* For now we don't handle imported units in type units. */
10529 if (cu
->per_cu
->is_debug_types
)
10531 error (_("Dwarf Error: DW_TAG_imported_unit is not"
10532 " supported in type units [in module %s]"),
10533 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
10536 attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
10539 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
10540 bool is_dwz
= (attr
->form
== DW_FORM_GNU_ref_alt
|| cu
->per_cu
->is_dwz
);
10541 dwarf2_per_cu_data
*per_cu
10542 = dwarf2_find_containing_comp_unit (sect_off
, is_dwz
,
10543 cu
->per_cu
->dwarf2_per_objfile
);
10545 /* If necessary, add it to the queue and load its DIEs. */
10546 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
10547 load_full_comp_unit (per_cu
, false, cu
->language
);
10549 VEC_safe_push (dwarf2_per_cu_ptr
, cu
->per_cu
->imported_symtabs
,
10554 /* RAII object that represents a process_die scope: i.e.,
10555 starts/finishes processing a DIE. */
10556 class process_die_scope
10559 process_die_scope (die_info
*die
, dwarf2_cu
*cu
)
10560 : m_die (die
), m_cu (cu
)
10562 /* We should only be processing DIEs not already in process. */
10563 gdb_assert (!m_die
->in_process
);
10564 m_die
->in_process
= true;
10567 ~process_die_scope ()
10569 m_die
->in_process
= false;
10571 /* If we're done processing the DIE for the CU that owns the line
10572 header, we don't need the line header anymore. */
10573 if (m_cu
->line_header_die_owner
== m_die
)
10575 delete m_cu
->line_header
;
10576 m_cu
->line_header
= NULL
;
10577 m_cu
->line_header_die_owner
= NULL
;
10586 /* Process a die and its children. */
10589 process_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
10591 process_die_scope
scope (die
, cu
);
10595 case DW_TAG_padding
:
10597 case DW_TAG_compile_unit
:
10598 case DW_TAG_partial_unit
:
10599 read_file_scope (die
, cu
);
10601 case DW_TAG_type_unit
:
10602 read_type_unit_scope (die
, cu
);
10604 case DW_TAG_subprogram
:
10605 case DW_TAG_inlined_subroutine
:
10606 read_func_scope (die
, cu
);
10608 case DW_TAG_lexical_block
:
10609 case DW_TAG_try_block
:
10610 case DW_TAG_catch_block
:
10611 read_lexical_block_scope (die
, cu
);
10613 case DW_TAG_call_site
:
10614 case DW_TAG_GNU_call_site
:
10615 read_call_site_scope (die
, cu
);
10617 case DW_TAG_class_type
:
10618 case DW_TAG_interface_type
:
10619 case DW_TAG_structure_type
:
10620 case DW_TAG_union_type
:
10621 process_structure_scope (die
, cu
);
10623 case DW_TAG_enumeration_type
:
10624 process_enumeration_scope (die
, cu
);
10627 /* These dies have a type, but processing them does not create
10628 a symbol or recurse to process the children. Therefore we can
10629 read them on-demand through read_type_die. */
10630 case DW_TAG_subroutine_type
:
10631 case DW_TAG_set_type
:
10632 case DW_TAG_array_type
:
10633 case DW_TAG_pointer_type
:
10634 case DW_TAG_ptr_to_member_type
:
10635 case DW_TAG_reference_type
:
10636 case DW_TAG_rvalue_reference_type
:
10637 case DW_TAG_string_type
:
10640 case DW_TAG_base_type
:
10641 case DW_TAG_subrange_type
:
10642 case DW_TAG_typedef
:
10643 /* Add a typedef symbol for the type definition, if it has a
10645 new_symbol (die
, read_type_die (die
, cu
), cu
);
10647 case DW_TAG_common_block
:
10648 read_common_block (die
, cu
);
10650 case DW_TAG_common_inclusion
:
10652 case DW_TAG_namespace
:
10653 cu
->processing_has_namespace_info
= true;
10654 read_namespace (die
, cu
);
10656 case DW_TAG_module
:
10657 cu
->processing_has_namespace_info
= true;
10658 read_module (die
, cu
);
10660 case DW_TAG_imported_declaration
:
10661 cu
->processing_has_namespace_info
= true;
10662 if (read_namespace_alias (die
, cu
))
10664 /* The declaration is not a global namespace alias. */
10665 /* Fall through. */
10666 case DW_TAG_imported_module
:
10667 cu
->processing_has_namespace_info
= true;
10668 if (die
->child
!= NULL
&& (die
->tag
== DW_TAG_imported_declaration
10669 || cu
->language
!= language_fortran
))
10670 complaint (_("Tag '%s' has unexpected children"),
10671 dwarf_tag_name (die
->tag
));
10672 read_import_statement (die
, cu
);
10675 case DW_TAG_imported_unit
:
10676 process_imported_unit_die (die
, cu
);
10679 case DW_TAG_variable
:
10680 read_variable (die
, cu
);
10684 new_symbol (die
, NULL
, cu
);
10689 /* DWARF name computation. */
10691 /* A helper function for dwarf2_compute_name which determines whether DIE
10692 needs to have the name of the scope prepended to the name listed in the
10696 die_needs_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
10698 struct attribute
*attr
;
10702 case DW_TAG_namespace
:
10703 case DW_TAG_typedef
:
10704 case DW_TAG_class_type
:
10705 case DW_TAG_interface_type
:
10706 case DW_TAG_structure_type
:
10707 case DW_TAG_union_type
:
10708 case DW_TAG_enumeration_type
:
10709 case DW_TAG_enumerator
:
10710 case DW_TAG_subprogram
:
10711 case DW_TAG_inlined_subroutine
:
10712 case DW_TAG_member
:
10713 case DW_TAG_imported_declaration
:
10716 case DW_TAG_variable
:
10717 case DW_TAG_constant
:
10718 /* We only need to prefix "globally" visible variables. These include
10719 any variable marked with DW_AT_external or any variable that
10720 lives in a namespace. [Variables in anonymous namespaces
10721 require prefixing, but they are not DW_AT_external.] */
10723 if (dwarf2_attr (die
, DW_AT_specification
, cu
))
10725 struct dwarf2_cu
*spec_cu
= cu
;
10727 return die_needs_namespace (die_specification (die
, &spec_cu
),
10731 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
10732 if (attr
== NULL
&& die
->parent
->tag
!= DW_TAG_namespace
10733 && die
->parent
->tag
!= DW_TAG_module
)
10735 /* A variable in a lexical block of some kind does not need a
10736 namespace, even though in C++ such variables may be external
10737 and have a mangled name. */
10738 if (die
->parent
->tag
== DW_TAG_lexical_block
10739 || die
->parent
->tag
== DW_TAG_try_block
10740 || die
->parent
->tag
== DW_TAG_catch_block
10741 || die
->parent
->tag
== DW_TAG_subprogram
)
10750 /* Return the DIE's linkage name attribute, either DW_AT_linkage_name
10751 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10752 defined for the given DIE. */
10754 static struct attribute
*
10755 dw2_linkage_name_attr (struct die_info
*die
, struct dwarf2_cu
*cu
)
10757 struct attribute
*attr
;
10759 attr
= dwarf2_attr (die
, DW_AT_linkage_name
, cu
);
10761 attr
= dwarf2_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10766 /* Return the DIE's linkage name as a string, either DW_AT_linkage_name
10767 or DW_AT_MIPS_linkage_name. Returns NULL if the attribute is not
10768 defined for the given DIE. */
10770 static const char *
10771 dw2_linkage_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
10773 const char *linkage_name
;
10775 linkage_name
= dwarf2_string_attr (die
, DW_AT_linkage_name
, cu
);
10776 if (linkage_name
== NULL
)
10777 linkage_name
= dwarf2_string_attr (die
, DW_AT_MIPS_linkage_name
, cu
);
10779 return linkage_name
;
10782 /* Compute the fully qualified name of DIE in CU. If PHYSNAME is nonzero,
10783 compute the physname for the object, which include a method's:
10784 - formal parameters (C++),
10785 - receiver type (Go),
10787 The term "physname" is a bit confusing.
10788 For C++, for example, it is the demangled name.
10789 For Go, for example, it's the mangled name.
10791 For Ada, return the DIE's linkage name rather than the fully qualified
10792 name. PHYSNAME is ignored..
10794 The result is allocated on the objfile_obstack and canonicalized. */
10796 static const char *
10797 dwarf2_compute_name (const char *name
,
10798 struct die_info
*die
, struct dwarf2_cu
*cu
,
10801 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
10804 name
= dwarf2_name (die
, cu
);
10806 /* For Fortran GDB prefers DW_AT_*linkage_name for the physname if present
10807 but otherwise compute it by typename_concat inside GDB.
10808 FIXME: Actually this is not really true, or at least not always true.
10809 It's all very confusing. SYMBOL_SET_NAMES doesn't try to demangle
10810 Fortran names because there is no mangling standard. So new_symbol
10811 will set the demangled name to the result of dwarf2_full_name, and it is
10812 the demangled name that GDB uses if it exists. */
10813 if (cu
->language
== language_ada
10814 || (cu
->language
== language_fortran
&& physname
))
10816 /* For Ada unit, we prefer the linkage name over the name, as
10817 the former contains the exported name, which the user expects
10818 to be able to reference. Ideally, we want the user to be able
10819 to reference this entity using either natural or linkage name,
10820 but we haven't started looking at this enhancement yet. */
10821 const char *linkage_name
= dw2_linkage_name (die
, cu
);
10823 if (linkage_name
!= NULL
)
10824 return linkage_name
;
10827 /* These are the only languages we know how to qualify names in. */
10829 && (cu
->language
== language_cplus
10830 || cu
->language
== language_fortran
|| cu
->language
== language_d
10831 || cu
->language
== language_rust
))
10833 if (die_needs_namespace (die
, cu
))
10835 const char *prefix
;
10836 const char *canonical_name
= NULL
;
10840 prefix
= determine_prefix (die
, cu
);
10841 if (*prefix
!= '\0')
10843 char *prefixed_name
= typename_concat (NULL
, prefix
, name
,
10846 buf
.puts (prefixed_name
);
10847 xfree (prefixed_name
);
10852 /* Template parameters may be specified in the DIE's DW_AT_name, or
10853 as children with DW_TAG_template_type_param or
10854 DW_TAG_value_type_param. If the latter, add them to the name
10855 here. If the name already has template parameters, then
10856 skip this step; some versions of GCC emit both, and
10857 it is more efficient to use the pre-computed name.
10859 Something to keep in mind about this process: it is very
10860 unlikely, or in some cases downright impossible, to produce
10861 something that will match the mangled name of a function.
10862 If the definition of the function has the same debug info,
10863 we should be able to match up with it anyway. But fallbacks
10864 using the minimal symbol, for instance to find a method
10865 implemented in a stripped copy of libstdc++, will not work.
10866 If we do not have debug info for the definition, we will have to
10867 match them up some other way.
10869 When we do name matching there is a related problem with function
10870 templates; two instantiated function templates are allowed to
10871 differ only by their return types, which we do not add here. */
10873 if (cu
->language
== language_cplus
&& strchr (name
, '<') == NULL
)
10875 struct attribute
*attr
;
10876 struct die_info
*child
;
10879 die
->building_fullname
= 1;
10881 for (child
= die
->child
; child
!= NULL
; child
= child
->sibling
)
10885 const gdb_byte
*bytes
;
10886 struct dwarf2_locexpr_baton
*baton
;
10889 if (child
->tag
!= DW_TAG_template_type_param
10890 && child
->tag
!= DW_TAG_template_value_param
)
10901 attr
= dwarf2_attr (child
, DW_AT_type
, cu
);
10904 complaint (_("template parameter missing DW_AT_type"));
10905 buf
.puts ("UNKNOWN_TYPE");
10908 type
= die_type (child
, cu
);
10910 if (child
->tag
== DW_TAG_template_type_param
)
10912 c_print_type (type
, "", &buf
, -1, 0, cu
->language
,
10913 &type_print_raw_options
);
10917 attr
= dwarf2_attr (child
, DW_AT_const_value
, cu
);
10920 complaint (_("template parameter missing "
10921 "DW_AT_const_value"));
10922 buf
.puts ("UNKNOWN_VALUE");
10926 dwarf2_const_value_attr (attr
, type
, name
,
10927 &cu
->comp_unit_obstack
, cu
,
10928 &value
, &bytes
, &baton
);
10930 if (TYPE_NOSIGN (type
))
10931 /* GDB prints characters as NUMBER 'CHAR'. If that's
10932 changed, this can use value_print instead. */
10933 c_printchar (value
, type
, &buf
);
10936 struct value_print_options opts
;
10939 v
= dwarf2_evaluate_loc_desc (type
, NULL
,
10943 else if (bytes
!= NULL
)
10945 v
= allocate_value (type
);
10946 memcpy (value_contents_writeable (v
), bytes
,
10947 TYPE_LENGTH (type
));
10950 v
= value_from_longest (type
, value
);
10952 /* Specify decimal so that we do not depend on
10954 get_formatted_print_options (&opts
, 'd');
10956 value_print (v
, &buf
, &opts
);
10961 die
->building_fullname
= 0;
10965 /* Close the argument list, with a space if necessary
10966 (nested templates). */
10967 if (!buf
.empty () && buf
.string ().back () == '>')
10974 /* For C++ methods, append formal parameter type
10975 information, if PHYSNAME. */
10977 if (physname
&& die
->tag
== DW_TAG_subprogram
10978 && cu
->language
== language_cplus
)
10980 struct type
*type
= read_type_die (die
, cu
);
10982 c_type_print_args (type
, &buf
, 1, cu
->language
,
10983 &type_print_raw_options
);
10985 if (cu
->language
== language_cplus
)
10987 /* Assume that an artificial first parameter is
10988 "this", but do not crash if it is not. RealView
10989 marks unnamed (and thus unused) parameters as
10990 artificial; there is no way to differentiate
10992 if (TYPE_NFIELDS (type
) > 0
10993 && TYPE_FIELD_ARTIFICIAL (type
, 0)
10994 && TYPE_CODE (TYPE_FIELD_TYPE (type
, 0)) == TYPE_CODE_PTR
10995 && TYPE_CONST (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type
,
10997 buf
.puts (" const");
11001 const std::string
&intermediate_name
= buf
.string ();
11003 if (cu
->language
== language_cplus
)
11005 = dwarf2_canonicalize_name (intermediate_name
.c_str (), cu
,
11006 &objfile
->per_bfd
->storage_obstack
);
11008 /* If we only computed INTERMEDIATE_NAME, or if
11009 INTERMEDIATE_NAME is already canonical, then we need to
11010 copy it to the appropriate obstack. */
11011 if (canonical_name
== NULL
|| canonical_name
== intermediate_name
.c_str ())
11012 name
= ((const char *)
11013 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
11014 intermediate_name
.c_str (),
11015 intermediate_name
.length ()));
11017 name
= canonical_name
;
11024 /* Return the fully qualified name of DIE, based on its DW_AT_name.
11025 If scope qualifiers are appropriate they will be added. The result
11026 will be allocated on the storage_obstack, or NULL if the DIE does
11027 not have a name. NAME may either be from a previous call to
11028 dwarf2_name or NULL.
11030 The output string will be canonicalized (if C++). */
11032 static const char *
11033 dwarf2_full_name (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
11035 return dwarf2_compute_name (name
, die
, cu
, 0);
11038 /* Construct a physname for the given DIE in CU. NAME may either be
11039 from a previous call to dwarf2_name or NULL. The result will be
11040 allocated on the objfile_objstack or NULL if the DIE does not have a
11043 The output string will be canonicalized (if C++). */
11045 static const char *
11046 dwarf2_physname (const char *name
, struct die_info
*die
, struct dwarf2_cu
*cu
)
11048 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11049 const char *retval
, *mangled
= NULL
, *canon
= NULL
;
11052 /* In this case dwarf2_compute_name is just a shortcut not building anything
11054 if (!die_needs_namespace (die
, cu
))
11055 return dwarf2_compute_name (name
, die
, cu
, 1);
11057 mangled
= dw2_linkage_name (die
, cu
);
11059 /* rustc emits invalid values for DW_AT_linkage_name. Ignore these.
11060 See https://github.com/rust-lang/rust/issues/32925. */
11061 if (cu
->language
== language_rust
&& mangled
!= NULL
11062 && strchr (mangled
, '{') != NULL
)
11065 /* DW_AT_linkage_name is missing in some cases - depend on what GDB
11067 gdb::unique_xmalloc_ptr
<char> demangled
;
11068 if (mangled
!= NULL
)
11071 if (language_def (cu
->language
)->la_store_sym_names_in_linkage_form_p
)
11073 /* Do nothing (do not demangle the symbol name). */
11075 else if (cu
->language
== language_go
)
11077 /* This is a lie, but we already lie to the caller new_symbol.
11078 new_symbol assumes we return the mangled name.
11079 This just undoes that lie until things are cleaned up. */
11083 /* Use DMGL_RET_DROP for C++ template functions to suppress
11084 their return type. It is easier for GDB users to search
11085 for such functions as `name(params)' than `long name(params)'.
11086 In such case the minimal symbol names do not match the full
11087 symbol names but for template functions there is never a need
11088 to look up their definition from their declaration so
11089 the only disadvantage remains the minimal symbol variant
11090 `long name(params)' does not have the proper inferior type. */
11091 demangled
.reset (gdb_demangle (mangled
,
11092 (DMGL_PARAMS
| DMGL_ANSI
11093 | DMGL_RET_DROP
)));
11096 canon
= demangled
.get ();
11104 if (canon
== NULL
|| check_physname
)
11106 const char *physname
= dwarf2_compute_name (name
, die
, cu
, 1);
11108 if (canon
!= NULL
&& strcmp (physname
, canon
) != 0)
11110 /* It may not mean a bug in GDB. The compiler could also
11111 compute DW_AT_linkage_name incorrectly. But in such case
11112 GDB would need to be bug-to-bug compatible. */
11114 complaint (_("Computed physname <%s> does not match demangled <%s> "
11115 "(from linkage <%s>) - DIE at %s [in module %s]"),
11116 physname
, canon
, mangled
, sect_offset_str (die
->sect_off
),
11117 objfile_name (objfile
));
11119 /* Prefer DW_AT_linkage_name (in the CANON form) - when it
11120 is available here - over computed PHYSNAME. It is safer
11121 against both buggy GDB and buggy compilers. */
11135 retval
= ((const char *)
11136 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
11137 retval
, strlen (retval
)));
11142 /* Inspect DIE in CU for a namespace alias. If one exists, record
11143 a new symbol for it.
11145 Returns 1 if a namespace alias was recorded, 0 otherwise. */
11148 read_namespace_alias (struct die_info
*die
, struct dwarf2_cu
*cu
)
11150 struct attribute
*attr
;
11152 /* If the die does not have a name, this is not a namespace
11154 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
11158 struct die_info
*d
= die
;
11159 struct dwarf2_cu
*imported_cu
= cu
;
11161 /* If the compiler has nested DW_AT_imported_declaration DIEs,
11162 keep inspecting DIEs until we hit the underlying import. */
11163 #define MAX_NESTED_IMPORTED_DECLARATIONS 100
11164 for (num
= 0; num
< MAX_NESTED_IMPORTED_DECLARATIONS
; ++num
)
11166 attr
= dwarf2_attr (d
, DW_AT_import
, cu
);
11170 d
= follow_die_ref (d
, attr
, &imported_cu
);
11171 if (d
->tag
!= DW_TAG_imported_declaration
)
11175 if (num
== MAX_NESTED_IMPORTED_DECLARATIONS
)
11177 complaint (_("DIE at %s has too many recursively imported "
11178 "declarations"), sect_offset_str (d
->sect_off
));
11185 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
11187 type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
11188 if (type
!= NULL
&& TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
11190 /* This declaration is a global namespace alias. Add
11191 a symbol for it whose type is the aliased namespace. */
11192 new_symbol (die
, type
, cu
);
11201 /* Return the using directives repository (global or local?) to use in the
11202 current context for CU.
11204 For Ada, imported declarations can materialize renamings, which *may* be
11205 global. However it is impossible (for now?) in DWARF to distinguish
11206 "external" imported declarations and "static" ones. As all imported
11207 declarations seem to be static in all other languages, make them all CU-wide
11208 global only in Ada. */
11210 static struct using_direct
**
11211 using_directives (struct dwarf2_cu
*cu
)
11213 if (cu
->language
== language_ada
11214 && cu
->get_builder ()->outermost_context_p ())
11215 return cu
->get_builder ()->get_global_using_directives ();
11217 return cu
->get_builder ()->get_local_using_directives ();
11220 /* Read the import statement specified by the given die and record it. */
11223 read_import_statement (struct die_info
*die
, struct dwarf2_cu
*cu
)
11225 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
11226 struct attribute
*import_attr
;
11227 struct die_info
*imported_die
, *child_die
;
11228 struct dwarf2_cu
*imported_cu
;
11229 const char *imported_name
;
11230 const char *imported_name_prefix
;
11231 const char *canonical_name
;
11232 const char *import_alias
;
11233 const char *imported_declaration
= NULL
;
11234 const char *import_prefix
;
11235 std::vector
<const char *> excludes
;
11237 import_attr
= dwarf2_attr (die
, DW_AT_import
, cu
);
11238 if (import_attr
== NULL
)
11240 complaint (_("Tag '%s' has no DW_AT_import"),
11241 dwarf_tag_name (die
->tag
));
11246 imported_die
= follow_die_ref_or_sig (die
, import_attr
, &imported_cu
);
11247 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11248 if (imported_name
== NULL
)
11250 /* GCC bug: https://bugzilla.redhat.com/show_bug.cgi?id=506524
11252 The import in the following code:
11266 <2><51>: Abbrev Number: 3 (DW_TAG_imported_declaration)
11267 <52> DW_AT_decl_file : 1
11268 <53> DW_AT_decl_line : 6
11269 <54> DW_AT_import : <0x75>
11270 <2><58>: Abbrev Number: 4 (DW_TAG_typedef)
11271 <59> DW_AT_name : B
11272 <5b> DW_AT_decl_file : 1
11273 <5c> DW_AT_decl_line : 2
11274 <5d> DW_AT_type : <0x6e>
11276 <1><75>: Abbrev Number: 7 (DW_TAG_base_type)
11277 <76> DW_AT_byte_size : 4
11278 <77> DW_AT_encoding : 5 (signed)
11280 imports the wrong die ( 0x75 instead of 0x58 ).
11281 This case will be ignored until the gcc bug is fixed. */
11285 /* Figure out the local name after import. */
11286 import_alias
= dwarf2_name (die
, cu
);
11288 /* Figure out where the statement is being imported to. */
11289 import_prefix
= determine_prefix (die
, cu
);
11291 /* Figure out what the scope of the imported die is and prepend it
11292 to the name of the imported die. */
11293 imported_name_prefix
= determine_prefix (imported_die
, imported_cu
);
11295 if (imported_die
->tag
!= DW_TAG_namespace
11296 && imported_die
->tag
!= DW_TAG_module
)
11298 imported_declaration
= imported_name
;
11299 canonical_name
= imported_name_prefix
;
11301 else if (strlen (imported_name_prefix
) > 0)
11302 canonical_name
= obconcat (&objfile
->objfile_obstack
,
11303 imported_name_prefix
,
11304 (cu
->language
== language_d
? "." : "::"),
11305 imported_name
, (char *) NULL
);
11307 canonical_name
= imported_name
;
11309 if (die
->tag
== DW_TAG_imported_module
&& cu
->language
== language_fortran
)
11310 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
11311 child_die
= sibling_die (child_die
))
11313 /* DWARF-4: A Fortran use statement with a “rename list” may be
11314 represented by an imported module entry with an import attribute
11315 referring to the module and owned entries corresponding to those
11316 entities that are renamed as part of being imported. */
11318 if (child_die
->tag
!= DW_TAG_imported_declaration
)
11320 complaint (_("child DW_TAG_imported_declaration expected "
11321 "- DIE at %s [in module %s]"),
11322 sect_offset_str (child_die
->sect_off
),
11323 objfile_name (objfile
));
11327 import_attr
= dwarf2_attr (child_die
, DW_AT_import
, cu
);
11328 if (import_attr
== NULL
)
11330 complaint (_("Tag '%s' has no DW_AT_import"),
11331 dwarf_tag_name (child_die
->tag
));
11336 imported_die
= follow_die_ref_or_sig (child_die
, import_attr
,
11338 imported_name
= dwarf2_name (imported_die
, imported_cu
);
11339 if (imported_name
== NULL
)
11341 complaint (_("child DW_TAG_imported_declaration has unknown "
11342 "imported name - DIE at %s [in module %s]"),
11343 sect_offset_str (child_die
->sect_off
),
11344 objfile_name (objfile
));
11348 excludes
.push_back (imported_name
);
11350 process_die (child_die
, cu
);
11353 add_using_directive (using_directives (cu
),
11357 imported_declaration
,
11360 &objfile
->objfile_obstack
);
11363 /* ICC<14 does not output the required DW_AT_declaration on incomplete
11364 types, but gives them a size of zero. Starting with version 14,
11365 ICC is compatible with GCC. */
11368 producer_is_icc_lt_14 (struct dwarf2_cu
*cu
)
11370 if (!cu
->checked_producer
)
11371 check_producer (cu
);
11373 return cu
->producer_is_icc_lt_14
;
11376 /* ICC generates a DW_AT_type for C void functions. This was observed on
11377 ICC 14.0.5.212, and appears to be against the DWARF spec (V5 3.3.2)
11378 which says that void functions should not have a DW_AT_type. */
11381 producer_is_icc (struct dwarf2_cu
*cu
)
11383 if (!cu
->checked_producer
)
11384 check_producer (cu
);
11386 return cu
->producer_is_icc
;
11389 /* Check for possibly missing DW_AT_comp_dir with relative .debug_line
11390 directory paths. GCC SVN r127613 (new option -fdebug-prefix-map) fixed
11391 this, it was first present in GCC release 4.3.0. */
11394 producer_is_gcc_lt_4_3 (struct dwarf2_cu
*cu
)
11396 if (!cu
->checked_producer
)
11397 check_producer (cu
);
11399 return cu
->producer_is_gcc_lt_4_3
;
11402 static file_and_directory
11403 find_file_and_directory (struct die_info
*die
, struct dwarf2_cu
*cu
)
11405 file_and_directory res
;
11407 /* Find the filename. Do not use dwarf2_name here, since the filename
11408 is not a source language identifier. */
11409 res
.name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
11410 res
.comp_dir
= dwarf2_string_attr (die
, DW_AT_comp_dir
, cu
);
11412 if (res
.comp_dir
== NULL
11413 && producer_is_gcc_lt_4_3 (cu
) && res
.name
!= NULL
11414 && IS_ABSOLUTE_PATH (res
.name
))
11416 res
.comp_dir_storage
= ldirname (res
.name
);
11417 if (!res
.comp_dir_storage
.empty ())
11418 res
.comp_dir
= res
.comp_dir_storage
.c_str ();
11420 if (res
.comp_dir
!= NULL
)
11422 /* Irix 6.2 native cc prepends <machine>.: to the compilation
11423 directory, get rid of it. */
11424 const char *cp
= strchr (res
.comp_dir
, ':');
11426 if (cp
&& cp
!= res
.comp_dir
&& cp
[-1] == '.' && cp
[1] == '/')
11427 res
.comp_dir
= cp
+ 1;
11430 if (res
.name
== NULL
)
11431 res
.name
= "<unknown>";
11436 /* Handle DW_AT_stmt_list for a compilation unit.
11437 DIE is the DW_TAG_compile_unit die for CU.
11438 COMP_DIR is the compilation directory. LOWPC is passed to
11439 dwarf_decode_lines. See dwarf_decode_lines comments about it. */
11442 handle_DW_AT_stmt_list (struct die_info
*die
, struct dwarf2_cu
*cu
,
11443 const char *comp_dir
, CORE_ADDR lowpc
) /* ARI: editCase function */
11445 struct dwarf2_per_objfile
*dwarf2_per_objfile
11446 = cu
->per_cu
->dwarf2_per_objfile
;
11447 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11448 struct attribute
*attr
;
11449 struct line_header line_header_local
;
11450 hashval_t line_header_local_hash
;
11452 int decode_mapping
;
11454 gdb_assert (! cu
->per_cu
->is_debug_types
);
11456 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, cu
);
11460 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11462 /* The line header hash table is only created if needed (it exists to
11463 prevent redundant reading of the line table for partial_units).
11464 If we're given a partial_unit, we'll need it. If we're given a
11465 compile_unit, then use the line header hash table if it's already
11466 created, but don't create one just yet. */
11468 if (dwarf2_per_objfile
->line_header_hash
== NULL
11469 && die
->tag
== DW_TAG_partial_unit
)
11471 dwarf2_per_objfile
->line_header_hash
11472 = htab_create_alloc_ex (127, line_header_hash_voidp
,
11473 line_header_eq_voidp
,
11474 free_line_header_voidp
,
11475 &objfile
->objfile_obstack
,
11476 hashtab_obstack_allocate
,
11477 dummy_obstack_deallocate
);
11480 line_header_local
.sect_off
= line_offset
;
11481 line_header_local
.offset_in_dwz
= cu
->per_cu
->is_dwz
;
11482 line_header_local_hash
= line_header_hash (&line_header_local
);
11483 if (dwarf2_per_objfile
->line_header_hash
!= NULL
)
11485 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11486 &line_header_local
,
11487 line_header_local_hash
, NO_INSERT
);
11489 /* For DW_TAG_compile_unit we need info like symtab::linetable which
11490 is not present in *SLOT (since if there is something in *SLOT then
11491 it will be for a partial_unit). */
11492 if (die
->tag
== DW_TAG_partial_unit
&& slot
!= NULL
)
11494 gdb_assert (*slot
!= NULL
);
11495 cu
->line_header
= (struct line_header
*) *slot
;
11500 /* dwarf_decode_line_header does not yet provide sufficient information.
11501 We always have to call also dwarf_decode_lines for it. */
11502 line_header_up lh
= dwarf_decode_line_header (line_offset
, cu
);
11506 cu
->line_header
= lh
.release ();
11507 cu
->line_header_die_owner
= die
;
11509 if (dwarf2_per_objfile
->line_header_hash
== NULL
)
11513 slot
= htab_find_slot_with_hash (dwarf2_per_objfile
->line_header_hash
,
11514 &line_header_local
,
11515 line_header_local_hash
, INSERT
);
11516 gdb_assert (slot
!= NULL
);
11518 if (slot
!= NULL
&& *slot
== NULL
)
11520 /* This newly decoded line number information unit will be owned
11521 by line_header_hash hash table. */
11522 *slot
= cu
->line_header
;
11523 cu
->line_header_die_owner
= NULL
;
11527 /* We cannot free any current entry in (*slot) as that struct line_header
11528 may be already used by multiple CUs. Create only temporary decoded
11529 line_header for this CU - it may happen at most once for each line
11530 number information unit. And if we're not using line_header_hash
11531 then this is what we want as well. */
11532 gdb_assert (die
->tag
!= DW_TAG_partial_unit
);
11534 decode_mapping
= (die
->tag
!= DW_TAG_partial_unit
);
11535 dwarf_decode_lines (cu
->line_header
, comp_dir
, cu
, NULL
, lowpc
,
11540 /* Process DW_TAG_compile_unit or DW_TAG_partial_unit. */
11543 read_file_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11545 struct dwarf2_per_objfile
*dwarf2_per_objfile
11546 = cu
->per_cu
->dwarf2_per_objfile
;
11547 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11548 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
11549 CORE_ADDR lowpc
= ((CORE_ADDR
) -1);
11550 CORE_ADDR highpc
= ((CORE_ADDR
) 0);
11551 struct attribute
*attr
;
11552 struct die_info
*child_die
;
11553 CORE_ADDR baseaddr
;
11555 prepare_one_comp_unit (cu
, die
, cu
->language
);
11556 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
11558 get_scope_pc_bounds (die
, &lowpc
, &highpc
, cu
);
11560 /* If we didn't find a lowpc, set it to highpc to avoid complaints
11561 from finish_block. */
11562 if (lowpc
== ((CORE_ADDR
) -1))
11564 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
11566 file_and_directory fnd
= find_file_and_directory (die
, cu
);
11568 /* The XLCL doesn't generate DW_LANG_OpenCL because this attribute is not
11569 standardised yet. As a workaround for the language detection we fall
11570 back to the DW_AT_producer string. */
11571 if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL") != NULL
)
11572 cu
->language
= language_opencl
;
11574 /* Similar hack for Go. */
11575 if (cu
->producer
&& strstr (cu
->producer
, "GNU Go ") != NULL
)
11576 set_cu_language (DW_LANG_Go
, cu
);
11578 cu
->start_symtab (fnd
.name
, fnd
.comp_dir
, lowpc
);
11580 /* Decode line number information if present. We do this before
11581 processing child DIEs, so that the line header table is available
11582 for DW_AT_decl_file. */
11583 handle_DW_AT_stmt_list (die
, cu
, fnd
.comp_dir
, lowpc
);
11585 /* Process all dies in compilation unit. */
11586 if (die
->child
!= NULL
)
11588 child_die
= die
->child
;
11589 while (child_die
&& child_die
->tag
)
11591 process_die (child_die
, cu
);
11592 child_die
= sibling_die (child_die
);
11596 /* Decode macro information, if present. Dwarf 2 macro information
11597 refers to information in the line number info statement program
11598 header, so we can only read it if we've read the header
11600 attr
= dwarf2_attr (die
, DW_AT_macros
, cu
);
11602 attr
= dwarf2_attr (die
, DW_AT_GNU_macros
, cu
);
11603 if (attr
&& cu
->line_header
)
11605 if (dwarf2_attr (die
, DW_AT_macro_info
, cu
))
11606 complaint (_("CU refers to both DW_AT_macros and DW_AT_macro_info"));
11608 dwarf_decode_macros (cu
, DW_UNSND (attr
), 1);
11612 attr
= dwarf2_attr (die
, DW_AT_macro_info
, cu
);
11613 if (attr
&& cu
->line_header
)
11615 unsigned int macro_offset
= DW_UNSND (attr
);
11617 dwarf_decode_macros (cu
, macro_offset
, 0);
11623 dwarf2_cu::setup_type_unit_groups (struct die_info
*die
)
11625 struct type_unit_group
*tu_group
;
11627 struct attribute
*attr
;
11629 struct signatured_type
*sig_type
;
11631 gdb_assert (per_cu
->is_debug_types
);
11632 sig_type
= (struct signatured_type
*) per_cu
;
11634 attr
= dwarf2_attr (die
, DW_AT_stmt_list
, this);
11636 /* If we're using .gdb_index (includes -readnow) then
11637 per_cu->type_unit_group may not have been set up yet. */
11638 if (sig_type
->type_unit_group
== NULL
)
11639 sig_type
->type_unit_group
= get_type_unit_group (this, attr
);
11640 tu_group
= sig_type
->type_unit_group
;
11642 /* If we've already processed this stmt_list there's no real need to
11643 do it again, we could fake it and just recreate the part we need
11644 (file name,index -> symtab mapping). If data shows this optimization
11645 is useful we can do it then. */
11646 first_time
= tu_group
->compunit_symtab
== NULL
;
11648 /* We have to handle the case of both a missing DW_AT_stmt_list or bad
11653 sect_offset line_offset
= (sect_offset
) DW_UNSND (attr
);
11654 lh
= dwarf_decode_line_header (line_offset
, this);
11659 start_symtab ("", NULL
, 0);
11662 gdb_assert (tu_group
->symtabs
== NULL
);
11663 gdb_assert (m_builder
== nullptr);
11664 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11665 m_builder
.reset (new struct buildsym_compunit
11666 (COMPUNIT_OBJFILE (cust
), "",
11667 COMPUNIT_DIRNAME (cust
),
11668 compunit_language (cust
),
11674 line_header
= lh
.release ();
11675 line_header_die_owner
= die
;
11679 struct compunit_symtab
*cust
= start_symtab ("", NULL
, 0);
11681 /* Note: We don't assign tu_group->compunit_symtab yet because we're
11682 still initializing it, and our caller (a few levels up)
11683 process_full_type_unit still needs to know if this is the first
11686 tu_group
->num_symtabs
= line_header
->file_names
.size ();
11687 tu_group
->symtabs
= XNEWVEC (struct symtab
*,
11688 line_header
->file_names
.size ());
11690 for (i
= 0; i
< line_header
->file_names
.size (); ++i
)
11692 file_entry
&fe
= line_header
->file_names
[i
];
11694 dwarf2_start_subfile (this, fe
.name
,
11695 fe
.include_dir (line_header
));
11696 buildsym_compunit
*b
= get_builder ();
11697 if (b
->get_current_subfile ()->symtab
== NULL
)
11699 /* NOTE: start_subfile will recognize when it's been
11700 passed a file it has already seen. So we can't
11701 assume there's a simple mapping from
11702 cu->line_header->file_names to subfiles, plus
11703 cu->line_header->file_names may contain dups. */
11704 b
->get_current_subfile ()->symtab
11705 = allocate_symtab (cust
, b
->get_current_subfile ()->name
);
11708 fe
.symtab
= b
->get_current_subfile ()->symtab
;
11709 tu_group
->symtabs
[i
] = fe
.symtab
;
11714 gdb_assert (m_builder
== nullptr);
11715 struct compunit_symtab
*cust
= tu_group
->compunit_symtab
;
11716 m_builder
.reset (new struct buildsym_compunit
11717 (COMPUNIT_OBJFILE (cust
), "",
11718 COMPUNIT_DIRNAME (cust
),
11719 compunit_language (cust
),
11722 for (i
= 0; i
< line_header
->file_names
.size (); ++i
)
11724 file_entry
&fe
= line_header
->file_names
[i
];
11726 fe
.symtab
= tu_group
->symtabs
[i
];
11730 /* The main symtab is allocated last. Type units don't have DW_AT_name
11731 so they don't have a "real" (so to speak) symtab anyway.
11732 There is later code that will assign the main symtab to all symbols
11733 that don't have one. We need to handle the case of a symbol with a
11734 missing symtab (DW_AT_decl_file) anyway. */
11737 /* Process DW_TAG_type_unit.
11738 For TUs we want to skip the first top level sibling if it's not the
11739 actual type being defined by this TU. In this case the first top
11740 level sibling is there to provide context only. */
11743 read_type_unit_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
11745 struct die_info
*child_die
;
11747 prepare_one_comp_unit (cu
, die
, language_minimal
);
11749 /* Initialize (or reinitialize) the machinery for building symtabs.
11750 We do this before processing child DIEs, so that the line header table
11751 is available for DW_AT_decl_file. */
11752 cu
->setup_type_unit_groups (die
);
11754 if (die
->child
!= NULL
)
11756 child_die
= die
->child
;
11757 while (child_die
&& child_die
->tag
)
11759 process_die (child_die
, cu
);
11760 child_die
= sibling_die (child_die
);
11767 http://gcc.gnu.org/wiki/DebugFission
11768 http://gcc.gnu.org/wiki/DebugFissionDWP
11770 To simplify handling of both DWO files ("object" files with the DWARF info)
11771 and DWP files (a file with the DWOs packaged up into one file), we treat
11772 DWP files as having a collection of virtual DWO files. */
11775 hash_dwo_file (const void *item
)
11777 const struct dwo_file
*dwo_file
= (const struct dwo_file
*) item
;
11780 hash
= htab_hash_string (dwo_file
->dwo_name
);
11781 if (dwo_file
->comp_dir
!= NULL
)
11782 hash
+= htab_hash_string (dwo_file
->comp_dir
);
11787 eq_dwo_file (const void *item_lhs
, const void *item_rhs
)
11789 const struct dwo_file
*lhs
= (const struct dwo_file
*) item_lhs
;
11790 const struct dwo_file
*rhs
= (const struct dwo_file
*) item_rhs
;
11792 if (strcmp (lhs
->dwo_name
, rhs
->dwo_name
) != 0)
11794 if (lhs
->comp_dir
== NULL
|| rhs
->comp_dir
== NULL
)
11795 return lhs
->comp_dir
== rhs
->comp_dir
;
11796 return strcmp (lhs
->comp_dir
, rhs
->comp_dir
) == 0;
11799 /* Allocate a hash table for DWO files. */
11802 allocate_dwo_file_hash_table (struct objfile
*objfile
)
11804 return htab_create_alloc_ex (41,
11808 &objfile
->objfile_obstack
,
11809 hashtab_obstack_allocate
,
11810 dummy_obstack_deallocate
);
11813 /* Lookup DWO file DWO_NAME. */
11816 lookup_dwo_file_slot (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11817 const char *dwo_name
,
11818 const char *comp_dir
)
11820 struct dwo_file find_entry
;
11823 if (dwarf2_per_objfile
->dwo_files
== NULL
)
11824 dwarf2_per_objfile
->dwo_files
11825 = allocate_dwo_file_hash_table (dwarf2_per_objfile
->objfile
);
11827 memset (&find_entry
, 0, sizeof (find_entry
));
11828 find_entry
.dwo_name
= dwo_name
;
11829 find_entry
.comp_dir
= comp_dir
;
11830 slot
= htab_find_slot (dwarf2_per_objfile
->dwo_files
, &find_entry
, INSERT
);
11836 hash_dwo_unit (const void *item
)
11838 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
11840 /* This drops the top 32 bits of the id, but is ok for a hash. */
11841 return dwo_unit
->signature
;
11845 eq_dwo_unit (const void *item_lhs
, const void *item_rhs
)
11847 const struct dwo_unit
*lhs
= (const struct dwo_unit
*) item_lhs
;
11848 const struct dwo_unit
*rhs
= (const struct dwo_unit
*) item_rhs
;
11850 /* The signature is assumed to be unique within the DWO file.
11851 So while object file CU dwo_id's always have the value zero,
11852 that's OK, assuming each object file DWO file has only one CU,
11853 and that's the rule for now. */
11854 return lhs
->signature
== rhs
->signature
;
11857 /* Allocate a hash table for DWO CUs,TUs.
11858 There is one of these tables for each of CUs,TUs for each DWO file. */
11861 allocate_dwo_unit_table (struct objfile
*objfile
)
11863 /* Start out with a pretty small number.
11864 Generally DWO files contain only one CU and maybe some TUs. */
11865 return htab_create_alloc_ex (3,
11869 &objfile
->objfile_obstack
,
11870 hashtab_obstack_allocate
,
11871 dummy_obstack_deallocate
);
11874 /* Structure used to pass data to create_dwo_debug_info_hash_table_reader. */
11876 struct create_dwo_cu_data
11878 struct dwo_file
*dwo_file
;
11879 struct dwo_unit dwo_unit
;
11882 /* die_reader_func for create_dwo_cu. */
11885 create_dwo_cu_reader (const struct die_reader_specs
*reader
,
11886 const gdb_byte
*info_ptr
,
11887 struct die_info
*comp_unit_die
,
11891 struct dwarf2_cu
*cu
= reader
->cu
;
11892 sect_offset sect_off
= cu
->per_cu
->sect_off
;
11893 struct dwarf2_section_info
*section
= cu
->per_cu
->section
;
11894 struct create_dwo_cu_data
*data
= (struct create_dwo_cu_data
*) datap
;
11895 struct dwo_file
*dwo_file
= data
->dwo_file
;
11896 struct dwo_unit
*dwo_unit
= &data
->dwo_unit
;
11897 struct attribute
*attr
;
11899 attr
= dwarf2_attr (comp_unit_die
, DW_AT_GNU_dwo_id
, cu
);
11902 complaint (_("Dwarf Error: debug entry at offset %s is missing"
11903 " its dwo_id [in module %s]"),
11904 sect_offset_str (sect_off
), dwo_file
->dwo_name
);
11908 dwo_unit
->dwo_file
= dwo_file
;
11909 dwo_unit
->signature
= DW_UNSND (attr
);
11910 dwo_unit
->section
= section
;
11911 dwo_unit
->sect_off
= sect_off
;
11912 dwo_unit
->length
= cu
->per_cu
->length
;
11914 if (dwarf_read_debug
)
11915 fprintf_unfiltered (gdb_stdlog
, " offset %s, dwo_id %s\n",
11916 sect_offset_str (sect_off
),
11917 hex_string (dwo_unit
->signature
));
11920 /* Create the dwo_units for the CUs in a DWO_FILE.
11921 Note: This function processes DWO files only, not DWP files. */
11924 create_cus_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
11925 struct dwo_file
&dwo_file
, dwarf2_section_info
§ion
,
11928 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
11929 const gdb_byte
*info_ptr
, *end_ptr
;
11931 dwarf2_read_section (objfile
, §ion
);
11932 info_ptr
= section
.buffer
;
11934 if (info_ptr
== NULL
)
11937 if (dwarf_read_debug
)
11939 fprintf_unfiltered (gdb_stdlog
, "Reading %s for %s:\n",
11940 get_section_name (§ion
),
11941 get_section_file_name (§ion
));
11944 end_ptr
= info_ptr
+ section
.size
;
11945 while (info_ptr
< end_ptr
)
11947 struct dwarf2_per_cu_data per_cu
;
11948 struct create_dwo_cu_data create_dwo_cu_data
;
11949 struct dwo_unit
*dwo_unit
;
11951 sect_offset sect_off
= (sect_offset
) (info_ptr
- section
.buffer
);
11953 memset (&create_dwo_cu_data
.dwo_unit
, 0,
11954 sizeof (create_dwo_cu_data
.dwo_unit
));
11955 memset (&per_cu
, 0, sizeof (per_cu
));
11956 per_cu
.dwarf2_per_objfile
= dwarf2_per_objfile
;
11957 per_cu
.is_debug_types
= 0;
11958 per_cu
.sect_off
= sect_offset (info_ptr
- section
.buffer
);
11959 per_cu
.section
= §ion
;
11960 create_dwo_cu_data
.dwo_file
= &dwo_file
;
11962 init_cutu_and_read_dies_no_follow (
11963 &per_cu
, &dwo_file
, create_dwo_cu_reader
, &create_dwo_cu_data
);
11964 info_ptr
+= per_cu
.length
;
11966 // If the unit could not be parsed, skip it.
11967 if (create_dwo_cu_data
.dwo_unit
.dwo_file
== NULL
)
11970 if (cus_htab
== NULL
)
11971 cus_htab
= allocate_dwo_unit_table (objfile
);
11973 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
11974 *dwo_unit
= create_dwo_cu_data
.dwo_unit
;
11975 slot
= htab_find_slot (cus_htab
, dwo_unit
, INSERT
);
11976 gdb_assert (slot
!= NULL
);
11979 const struct dwo_unit
*dup_cu
= (const struct dwo_unit
*)*slot
;
11980 sect_offset dup_sect_off
= dup_cu
->sect_off
;
11982 complaint (_("debug cu entry at offset %s is duplicate to"
11983 " the entry at offset %s, signature %s"),
11984 sect_offset_str (sect_off
), sect_offset_str (dup_sect_off
),
11985 hex_string (dwo_unit
->signature
));
11987 *slot
= (void *)dwo_unit
;
11991 /* DWP file .debug_{cu,tu}_index section format:
11992 [ref: http://gcc.gnu.org/wiki/DebugFissionDWP]
11996 Both index sections have the same format, and serve to map a 64-bit
11997 signature to a set of section numbers. Each section begins with a header,
11998 followed by a hash table of 64-bit signatures, a parallel table of 32-bit
11999 indexes, and a pool of 32-bit section numbers. The index sections will be
12000 aligned at 8-byte boundaries in the file.
12002 The index section header consists of:
12004 V, 32 bit version number
12006 N, 32 bit number of compilation units or type units in the index
12007 M, 32 bit number of slots in the hash table
12009 Numbers are recorded using the byte order of the application binary.
12011 The hash table begins at offset 16 in the section, and consists of an array
12012 of M 64-bit slots. Each slot contains a 64-bit signature (using the byte
12013 order of the application binary). Unused slots in the hash table are 0.
12014 (We rely on the extreme unlikeliness of a signature being exactly 0.)
12016 The parallel table begins immediately after the hash table
12017 (at offset 16 + 8 * M from the beginning of the section), and consists of an
12018 array of 32-bit indexes (using the byte order of the application binary),
12019 corresponding 1-1 with slots in the hash table. Each entry in the parallel
12020 table contains a 32-bit index into the pool of section numbers. For unused
12021 hash table slots, the corresponding entry in the parallel table will be 0.
12023 The pool of section numbers begins immediately following the hash table
12024 (at offset 16 + 12 * M from the beginning of the section). The pool of
12025 section numbers consists of an array of 32-bit words (using the byte order
12026 of the application binary). Each item in the array is indexed starting
12027 from 0. The hash table entry provides the index of the first section
12028 number in the set. Additional section numbers in the set follow, and the
12029 set is terminated by a 0 entry (section number 0 is not used in ELF).
12031 In each set of section numbers, the .debug_info.dwo or .debug_types.dwo
12032 section must be the first entry in the set, and the .debug_abbrev.dwo must
12033 be the second entry. Other members of the set may follow in any order.
12039 DWP Version 2 combines all the .debug_info, etc. sections into one,
12040 and the entries in the index tables are now offsets into these sections.
12041 CU offsets begin at 0. TU offsets begin at the size of the .debug_info
12044 Index Section Contents:
12046 Hash Table of Signatures dwp_hash_table.hash_table
12047 Parallel Table of Indices dwp_hash_table.unit_table
12048 Table of Section Offsets dwp_hash_table.v2.{section_ids,offsets}
12049 Table of Section Sizes dwp_hash_table.v2.sizes
12051 The index section header consists of:
12053 V, 32 bit version number
12054 L, 32 bit number of columns in the table of section offsets
12055 N, 32 bit number of compilation units or type units in the index
12056 M, 32 bit number of slots in the hash table
12058 Numbers are recorded using the byte order of the application binary.
12060 The hash table has the same format as version 1.
12061 The parallel table of indices has the same format as version 1,
12062 except that the entries are origin-1 indices into the table of sections
12063 offsets and the table of section sizes.
12065 The table of offsets begins immediately following the parallel table
12066 (at offset 16 + 12 * M from the beginning of the section). The table is
12067 a two-dimensional array of 32-bit words (using the byte order of the
12068 application binary), with L columns and N+1 rows, in row-major order.
12069 Each row in the array is indexed starting from 0. The first row provides
12070 a key to the remaining rows: each column in this row provides an identifier
12071 for a debug section, and the offsets in the same column of subsequent rows
12072 refer to that section. The section identifiers are:
12074 DW_SECT_INFO 1 .debug_info.dwo
12075 DW_SECT_TYPES 2 .debug_types.dwo
12076 DW_SECT_ABBREV 3 .debug_abbrev.dwo
12077 DW_SECT_LINE 4 .debug_line.dwo
12078 DW_SECT_LOC 5 .debug_loc.dwo
12079 DW_SECT_STR_OFFSETS 6 .debug_str_offsets.dwo
12080 DW_SECT_MACINFO 7 .debug_macinfo.dwo
12081 DW_SECT_MACRO 8 .debug_macro.dwo
12083 The offsets provided by the CU and TU index sections are the base offsets
12084 for the contributions made by each CU or TU to the corresponding section
12085 in the package file. Each CU and TU header contains an abbrev_offset
12086 field, used to find the abbreviations table for that CU or TU within the
12087 contribution to the .debug_abbrev.dwo section for that CU or TU, and should
12088 be interpreted as relative to the base offset given in the index section.
12089 Likewise, offsets into .debug_line.dwo from DW_AT_stmt_list attributes
12090 should be interpreted as relative to the base offset for .debug_line.dwo,
12091 and offsets into other debug sections obtained from DWARF attributes should
12092 also be interpreted as relative to the corresponding base offset.
12094 The table of sizes begins immediately following the table of offsets.
12095 Like the table of offsets, it is a two-dimensional array of 32-bit words,
12096 with L columns and N rows, in row-major order. Each row in the array is
12097 indexed starting from 1 (row 0 is shared by the two tables).
12101 Hash table lookup is handled the same in version 1 and 2:
12103 We assume that N and M will not exceed 2^32 - 1.
12104 The size of the hash table, M, must be 2^k such that 2^k > 3*N/2.
12106 Given a 64-bit compilation unit signature or a type signature S, an entry
12107 in the hash table is located as follows:
12109 1) Calculate a primary hash H = S & MASK(k), where MASK(k) is a mask with
12110 the low-order k bits all set to 1.
12112 2) Calculate a secondary hash H' = (((S >> 32) & MASK(k)) | 1).
12114 3) If the hash table entry at index H matches the signature, use that
12115 entry. If the hash table entry at index H is unused (all zeroes),
12116 terminate the search: the signature is not present in the table.
12118 4) Let H = (H + H') modulo M. Repeat at Step 3.
12120 Because M > N and H' and M are relatively prime, the search is guaranteed
12121 to stop at an unused slot or find the match. */
12123 /* Create a hash table to map DWO IDs to their CU/TU entry in
12124 .debug_{info,types}.dwo in DWP_FILE.
12125 Returns NULL if there isn't one.
12126 Note: This function processes DWP files only, not DWO files. */
12128 static struct dwp_hash_table
*
12129 create_dwp_hash_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12130 struct dwp_file
*dwp_file
, int is_debug_types
)
12132 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12133 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12134 const gdb_byte
*index_ptr
, *index_end
;
12135 struct dwarf2_section_info
*index
;
12136 uint32_t version
, nr_columns
, nr_units
, nr_slots
;
12137 struct dwp_hash_table
*htab
;
12139 if (is_debug_types
)
12140 index
= &dwp_file
->sections
.tu_index
;
12142 index
= &dwp_file
->sections
.cu_index
;
12144 if (dwarf2_section_empty_p (index
))
12146 dwarf2_read_section (objfile
, index
);
12148 index_ptr
= index
->buffer
;
12149 index_end
= index_ptr
+ index
->size
;
12151 version
= read_4_bytes (dbfd
, index_ptr
);
12154 nr_columns
= read_4_bytes (dbfd
, index_ptr
);
12158 nr_units
= read_4_bytes (dbfd
, index_ptr
);
12160 nr_slots
= read_4_bytes (dbfd
, index_ptr
);
12163 if (version
!= 1 && version
!= 2)
12165 error (_("Dwarf Error: unsupported DWP file version (%s)"
12166 " [in module %s]"),
12167 pulongest (version
), dwp_file
->name
);
12169 if (nr_slots
!= (nr_slots
& -nr_slots
))
12171 error (_("Dwarf Error: number of slots in DWP hash table (%s)"
12172 " is not power of 2 [in module %s]"),
12173 pulongest (nr_slots
), dwp_file
->name
);
12176 htab
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwp_hash_table
);
12177 htab
->version
= version
;
12178 htab
->nr_columns
= nr_columns
;
12179 htab
->nr_units
= nr_units
;
12180 htab
->nr_slots
= nr_slots
;
12181 htab
->hash_table
= index_ptr
;
12182 htab
->unit_table
= htab
->hash_table
+ sizeof (uint64_t) * nr_slots
;
12184 /* Exit early if the table is empty. */
12185 if (nr_slots
== 0 || nr_units
== 0
12186 || (version
== 2 && nr_columns
== 0))
12188 /* All must be zero. */
12189 if (nr_slots
!= 0 || nr_units
!= 0
12190 || (version
== 2 && nr_columns
!= 0))
12192 complaint (_("Empty DWP but nr_slots,nr_units,nr_columns not"
12193 " all zero [in modules %s]"),
12201 htab
->section_pool
.v1
.indices
=
12202 htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12203 /* It's harder to decide whether the section is too small in v1.
12204 V1 is deprecated anyway so we punt. */
12208 const gdb_byte
*ids_ptr
= htab
->unit_table
+ sizeof (uint32_t) * nr_slots
;
12209 int *ids
= htab
->section_pool
.v2
.section_ids
;
12210 size_t sizeof_ids
= sizeof (htab
->section_pool
.v2
.section_ids
);
12211 /* Reverse map for error checking. */
12212 int ids_seen
[DW_SECT_MAX
+ 1];
12215 if (nr_columns
< 2)
12217 error (_("Dwarf Error: bad DWP hash table, too few columns"
12218 " in section table [in module %s]"),
12221 if (nr_columns
> MAX_NR_V2_DWO_SECTIONS
)
12223 error (_("Dwarf Error: bad DWP hash table, too many columns"
12224 " in section table [in module %s]"),
12227 memset (ids
, 255, sizeof_ids
);
12228 memset (ids_seen
, 255, sizeof (ids_seen
));
12229 for (i
= 0; i
< nr_columns
; ++i
)
12231 int id
= read_4_bytes (dbfd
, ids_ptr
+ i
* sizeof (uint32_t));
12233 if (id
< DW_SECT_MIN
|| id
> DW_SECT_MAX
)
12235 error (_("Dwarf Error: bad DWP hash table, bad section id %d"
12236 " in section table [in module %s]"),
12237 id
, dwp_file
->name
);
12239 if (ids_seen
[id
] != -1)
12241 error (_("Dwarf Error: bad DWP hash table, duplicate section"
12242 " id %d in section table [in module %s]"),
12243 id
, dwp_file
->name
);
12248 /* Must have exactly one info or types section. */
12249 if (((ids_seen
[DW_SECT_INFO
] != -1)
12250 + (ids_seen
[DW_SECT_TYPES
] != -1))
12253 error (_("Dwarf Error: bad DWP hash table, missing/duplicate"
12254 " DWO info/types section [in module %s]"),
12257 /* Must have an abbrev section. */
12258 if (ids_seen
[DW_SECT_ABBREV
] == -1)
12260 error (_("Dwarf Error: bad DWP hash table, missing DWO abbrev"
12261 " section [in module %s]"),
12264 htab
->section_pool
.v2
.offsets
= ids_ptr
+ sizeof (uint32_t) * nr_columns
;
12265 htab
->section_pool
.v2
.sizes
=
12266 htab
->section_pool
.v2
.offsets
+ (sizeof (uint32_t)
12267 * nr_units
* nr_columns
);
12268 if ((htab
->section_pool
.v2
.sizes
+ (sizeof (uint32_t)
12269 * nr_units
* nr_columns
))
12272 error (_("Dwarf Error: DWP index section is corrupt (too small)"
12273 " [in module %s]"),
12281 /* Update SECTIONS with the data from SECTP.
12283 This function is like the other "locate" section routines that are
12284 passed to bfd_map_over_sections, but in this context the sections to
12285 read comes from the DWP V1 hash table, not the full ELF section table.
12287 The result is non-zero for success, or zero if an error was found. */
12290 locate_v1_virtual_dwo_sections (asection
*sectp
,
12291 struct virtual_v1_dwo_sections
*sections
)
12293 const struct dwop_section_names
*names
= &dwop_section_names
;
12295 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12297 /* There can be only one. */
12298 if (sections
->abbrev
.s
.section
!= NULL
)
12300 sections
->abbrev
.s
.section
= sectp
;
12301 sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12303 else if (section_is_p (sectp
->name
, &names
->info_dwo
)
12304 || section_is_p (sectp
->name
, &names
->types_dwo
))
12306 /* There can be only one. */
12307 if (sections
->info_or_types
.s
.section
!= NULL
)
12309 sections
->info_or_types
.s
.section
= sectp
;
12310 sections
->info_or_types
.size
= bfd_get_section_size (sectp
);
12312 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12314 /* There can be only one. */
12315 if (sections
->line
.s
.section
!= NULL
)
12317 sections
->line
.s
.section
= sectp
;
12318 sections
->line
.size
= bfd_get_section_size (sectp
);
12320 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12322 /* There can be only one. */
12323 if (sections
->loc
.s
.section
!= NULL
)
12325 sections
->loc
.s
.section
= sectp
;
12326 sections
->loc
.size
= bfd_get_section_size (sectp
);
12328 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12330 /* There can be only one. */
12331 if (sections
->macinfo
.s
.section
!= NULL
)
12333 sections
->macinfo
.s
.section
= sectp
;
12334 sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12336 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12338 /* There can be only one. */
12339 if (sections
->macro
.s
.section
!= NULL
)
12341 sections
->macro
.s
.section
= sectp
;
12342 sections
->macro
.size
= bfd_get_section_size (sectp
);
12344 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12346 /* There can be only one. */
12347 if (sections
->str_offsets
.s
.section
!= NULL
)
12349 sections
->str_offsets
.s
.section
= sectp
;
12350 sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12354 /* No other kind of section is valid. */
12361 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12362 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12363 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12364 This is for DWP version 1 files. */
12366 static struct dwo_unit
*
12367 create_dwo_unit_in_dwp_v1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12368 struct dwp_file
*dwp_file
,
12369 uint32_t unit_index
,
12370 const char *comp_dir
,
12371 ULONGEST signature
, int is_debug_types
)
12373 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12374 const struct dwp_hash_table
*dwp_htab
=
12375 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12376 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12377 const char *kind
= is_debug_types
? "TU" : "CU";
12378 struct dwo_file
*dwo_file
;
12379 struct dwo_unit
*dwo_unit
;
12380 struct virtual_v1_dwo_sections sections
;
12381 void **dwo_file_slot
;
12384 gdb_assert (dwp_file
->version
== 1);
12386 if (dwarf_read_debug
)
12388 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V1 file: %s\n",
12390 pulongest (unit_index
), hex_string (signature
),
12394 /* Fetch the sections of this DWO unit.
12395 Put a limit on the number of sections we look for so that bad data
12396 doesn't cause us to loop forever. */
12398 #define MAX_NR_V1_DWO_SECTIONS \
12399 (1 /* .debug_info or .debug_types */ \
12400 + 1 /* .debug_abbrev */ \
12401 + 1 /* .debug_line */ \
12402 + 1 /* .debug_loc */ \
12403 + 1 /* .debug_str_offsets */ \
12404 + 1 /* .debug_macro or .debug_macinfo */ \
12405 + 1 /* trailing zero */)
12407 memset (§ions
, 0, sizeof (sections
));
12409 for (i
= 0; i
< MAX_NR_V1_DWO_SECTIONS
; ++i
)
12412 uint32_t section_nr
=
12413 read_4_bytes (dbfd
,
12414 dwp_htab
->section_pool
.v1
.indices
12415 + (unit_index
+ i
) * sizeof (uint32_t));
12417 if (section_nr
== 0)
12419 if (section_nr
>= dwp_file
->num_sections
)
12421 error (_("Dwarf Error: bad DWP hash table, section number too large"
12422 " [in module %s]"),
12426 sectp
= dwp_file
->elf_sections
[section_nr
];
12427 if (! locate_v1_virtual_dwo_sections (sectp
, §ions
))
12429 error (_("Dwarf Error: bad DWP hash table, invalid section found"
12430 " [in module %s]"),
12436 || dwarf2_section_empty_p (§ions
.info_or_types
)
12437 || dwarf2_section_empty_p (§ions
.abbrev
))
12439 error (_("Dwarf Error: bad DWP hash table, missing DWO sections"
12440 " [in module %s]"),
12443 if (i
== MAX_NR_V1_DWO_SECTIONS
)
12445 error (_("Dwarf Error: bad DWP hash table, too many DWO sections"
12446 " [in module %s]"),
12450 /* It's easier for the rest of the code if we fake a struct dwo_file and
12451 have dwo_unit "live" in that. At least for now.
12453 The DWP file can be made up of a random collection of CUs and TUs.
12454 However, for each CU + set of TUs that came from the same original DWO
12455 file, we can combine them back into a virtual DWO file to save space
12456 (fewer struct dwo_file objects to allocate). Remember that for really
12457 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12459 std::string virtual_dwo_name
=
12460 string_printf ("virtual-dwo/%d-%d-%d-%d",
12461 get_section_id (§ions
.abbrev
),
12462 get_section_id (§ions
.line
),
12463 get_section_id (§ions
.loc
),
12464 get_section_id (§ions
.str_offsets
));
12465 /* Can we use an existing virtual DWO file? */
12466 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12467 virtual_dwo_name
.c_str (),
12469 /* Create one if necessary. */
12470 if (*dwo_file_slot
== NULL
)
12472 if (dwarf_read_debug
)
12474 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12475 virtual_dwo_name
.c_str ());
12477 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12479 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12480 virtual_dwo_name
.c_str (),
12481 virtual_dwo_name
.size ());
12482 dwo_file
->comp_dir
= comp_dir
;
12483 dwo_file
->sections
.abbrev
= sections
.abbrev
;
12484 dwo_file
->sections
.line
= sections
.line
;
12485 dwo_file
->sections
.loc
= sections
.loc
;
12486 dwo_file
->sections
.macinfo
= sections
.macinfo
;
12487 dwo_file
->sections
.macro
= sections
.macro
;
12488 dwo_file
->sections
.str_offsets
= sections
.str_offsets
;
12489 /* The "str" section is global to the entire DWP file. */
12490 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12491 /* The info or types section is assigned below to dwo_unit,
12492 there's no need to record it in dwo_file.
12493 Also, we can't simply record type sections in dwo_file because
12494 we record a pointer into the vector in dwo_unit. As we collect more
12495 types we'll grow the vector and eventually have to reallocate space
12496 for it, invalidating all copies of pointers into the previous
12498 *dwo_file_slot
= dwo_file
;
12502 if (dwarf_read_debug
)
12504 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12505 virtual_dwo_name
.c_str ());
12507 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12510 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12511 dwo_unit
->dwo_file
= dwo_file
;
12512 dwo_unit
->signature
= signature
;
12513 dwo_unit
->section
=
12514 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12515 *dwo_unit
->section
= sections
.info_or_types
;
12516 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12521 /* Subroutine of create_dwo_unit_in_dwp_v2 to simplify it.
12522 Given a pointer to the containing section SECTION, and OFFSET,SIZE of the
12523 piece within that section used by a TU/CU, return a virtual section
12524 of just that piece. */
12526 static struct dwarf2_section_info
12527 create_dwp_v2_section (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12528 struct dwarf2_section_info
*section
,
12529 bfd_size_type offset
, bfd_size_type size
)
12531 struct dwarf2_section_info result
;
12534 gdb_assert (section
!= NULL
);
12535 gdb_assert (!section
->is_virtual
);
12537 memset (&result
, 0, sizeof (result
));
12538 result
.s
.containing_section
= section
;
12539 result
.is_virtual
= 1;
12544 sectp
= get_section_bfd_section (section
);
12546 /* Flag an error if the piece denoted by OFFSET,SIZE is outside the
12547 bounds of the real section. This is a pretty-rare event, so just
12548 flag an error (easier) instead of a warning and trying to cope. */
12550 || offset
+ size
> bfd_get_section_size (sectp
))
12552 error (_("Dwarf Error: Bad DWP V2 section info, doesn't fit"
12553 " in section %s [in module %s]"),
12554 sectp
? bfd_section_name (abfd
, sectp
) : "<unknown>",
12555 objfile_name (dwarf2_per_objfile
->objfile
));
12558 result
.virtual_offset
= offset
;
12559 result
.size
= size
;
12563 /* Create a dwo_unit object for the DWO unit with signature SIGNATURE.
12564 UNIT_INDEX is the index of the DWO unit in the DWP hash table.
12565 COMP_DIR is the DW_AT_comp_dir attribute of the referencing CU.
12566 This is for DWP version 2 files. */
12568 static struct dwo_unit
*
12569 create_dwo_unit_in_dwp_v2 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12570 struct dwp_file
*dwp_file
,
12571 uint32_t unit_index
,
12572 const char *comp_dir
,
12573 ULONGEST signature
, int is_debug_types
)
12575 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12576 const struct dwp_hash_table
*dwp_htab
=
12577 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12578 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12579 const char *kind
= is_debug_types
? "TU" : "CU";
12580 struct dwo_file
*dwo_file
;
12581 struct dwo_unit
*dwo_unit
;
12582 struct virtual_v2_dwo_sections sections
;
12583 void **dwo_file_slot
;
12586 gdb_assert (dwp_file
->version
== 2);
12588 if (dwarf_read_debug
)
12590 fprintf_unfiltered (gdb_stdlog
, "Reading %s %s/%s in DWP V2 file: %s\n",
12592 pulongest (unit_index
), hex_string (signature
),
12596 /* Fetch the section offsets of this DWO unit. */
12598 memset (§ions
, 0, sizeof (sections
));
12600 for (i
= 0; i
< dwp_htab
->nr_columns
; ++i
)
12602 uint32_t offset
= read_4_bytes (dbfd
,
12603 dwp_htab
->section_pool
.v2
.offsets
12604 + (((unit_index
- 1) * dwp_htab
->nr_columns
12606 * sizeof (uint32_t)));
12607 uint32_t size
= read_4_bytes (dbfd
,
12608 dwp_htab
->section_pool
.v2
.sizes
12609 + (((unit_index
- 1) * dwp_htab
->nr_columns
12611 * sizeof (uint32_t)));
12613 switch (dwp_htab
->section_pool
.v2
.section_ids
[i
])
12616 case DW_SECT_TYPES
:
12617 sections
.info_or_types_offset
= offset
;
12618 sections
.info_or_types_size
= size
;
12620 case DW_SECT_ABBREV
:
12621 sections
.abbrev_offset
= offset
;
12622 sections
.abbrev_size
= size
;
12625 sections
.line_offset
= offset
;
12626 sections
.line_size
= size
;
12629 sections
.loc_offset
= offset
;
12630 sections
.loc_size
= size
;
12632 case DW_SECT_STR_OFFSETS
:
12633 sections
.str_offsets_offset
= offset
;
12634 sections
.str_offsets_size
= size
;
12636 case DW_SECT_MACINFO
:
12637 sections
.macinfo_offset
= offset
;
12638 sections
.macinfo_size
= size
;
12640 case DW_SECT_MACRO
:
12641 sections
.macro_offset
= offset
;
12642 sections
.macro_size
= size
;
12647 /* It's easier for the rest of the code if we fake a struct dwo_file and
12648 have dwo_unit "live" in that. At least for now.
12650 The DWP file can be made up of a random collection of CUs and TUs.
12651 However, for each CU + set of TUs that came from the same original DWO
12652 file, we can combine them back into a virtual DWO file to save space
12653 (fewer struct dwo_file objects to allocate). Remember that for really
12654 large apps there can be on the order of 8K CUs and 200K TUs, or more. */
12656 std::string virtual_dwo_name
=
12657 string_printf ("virtual-dwo/%ld-%ld-%ld-%ld",
12658 (long) (sections
.abbrev_size
? sections
.abbrev_offset
: 0),
12659 (long) (sections
.line_size
? sections
.line_offset
: 0),
12660 (long) (sections
.loc_size
? sections
.loc_offset
: 0),
12661 (long) (sections
.str_offsets_size
12662 ? sections
.str_offsets_offset
: 0));
12663 /* Can we use an existing virtual DWO file? */
12664 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
12665 virtual_dwo_name
.c_str (),
12667 /* Create one if necessary. */
12668 if (*dwo_file_slot
== NULL
)
12670 if (dwarf_read_debug
)
12672 fprintf_unfiltered (gdb_stdlog
, "Creating virtual DWO: %s\n",
12673 virtual_dwo_name
.c_str ());
12675 dwo_file
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_file
);
12677 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
,
12678 virtual_dwo_name
.c_str (),
12679 virtual_dwo_name
.size ());
12680 dwo_file
->comp_dir
= comp_dir
;
12681 dwo_file
->sections
.abbrev
=
12682 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.abbrev
,
12683 sections
.abbrev_offset
, sections
.abbrev_size
);
12684 dwo_file
->sections
.line
=
12685 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.line
,
12686 sections
.line_offset
, sections
.line_size
);
12687 dwo_file
->sections
.loc
=
12688 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.loc
,
12689 sections
.loc_offset
, sections
.loc_size
);
12690 dwo_file
->sections
.macinfo
=
12691 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macinfo
,
12692 sections
.macinfo_offset
, sections
.macinfo_size
);
12693 dwo_file
->sections
.macro
=
12694 create_dwp_v2_section (dwarf2_per_objfile
, &dwp_file
->sections
.macro
,
12695 sections
.macro_offset
, sections
.macro_size
);
12696 dwo_file
->sections
.str_offsets
=
12697 create_dwp_v2_section (dwarf2_per_objfile
,
12698 &dwp_file
->sections
.str_offsets
,
12699 sections
.str_offsets_offset
,
12700 sections
.str_offsets_size
);
12701 /* The "str" section is global to the entire DWP file. */
12702 dwo_file
->sections
.str
= dwp_file
->sections
.str
;
12703 /* The info or types section is assigned below to dwo_unit,
12704 there's no need to record it in dwo_file.
12705 Also, we can't simply record type sections in dwo_file because
12706 we record a pointer into the vector in dwo_unit. As we collect more
12707 types we'll grow the vector and eventually have to reallocate space
12708 for it, invalidating all copies of pointers into the previous
12710 *dwo_file_slot
= dwo_file
;
12714 if (dwarf_read_debug
)
12716 fprintf_unfiltered (gdb_stdlog
, "Using existing virtual DWO: %s\n",
12717 virtual_dwo_name
.c_str ());
12719 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
12722 dwo_unit
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct dwo_unit
);
12723 dwo_unit
->dwo_file
= dwo_file
;
12724 dwo_unit
->signature
= signature
;
12725 dwo_unit
->section
=
12726 XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_section_info
);
12727 *dwo_unit
->section
= create_dwp_v2_section (dwarf2_per_objfile
,
12729 ? &dwp_file
->sections
.types
12730 : &dwp_file
->sections
.info
,
12731 sections
.info_or_types_offset
,
12732 sections
.info_or_types_size
);
12733 /* dwo_unit->{offset,length,type_offset_in_tu} are set later. */
12738 /* Lookup the DWO unit with SIGNATURE in DWP_FILE.
12739 Returns NULL if the signature isn't found. */
12741 static struct dwo_unit
*
12742 lookup_dwo_unit_in_dwp (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12743 struct dwp_file
*dwp_file
, const char *comp_dir
,
12744 ULONGEST signature
, int is_debug_types
)
12746 const struct dwp_hash_table
*dwp_htab
=
12747 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
12748 bfd
*dbfd
= dwp_file
->dbfd
.get ();
12749 uint32_t mask
= dwp_htab
->nr_slots
- 1;
12750 uint32_t hash
= signature
& mask
;
12751 uint32_t hash2
= ((signature
>> 32) & mask
) | 1;
12754 struct dwo_unit find_dwo_cu
;
12756 memset (&find_dwo_cu
, 0, sizeof (find_dwo_cu
));
12757 find_dwo_cu
.signature
= signature
;
12758 slot
= htab_find_slot (is_debug_types
12759 ? dwp_file
->loaded_tus
12760 : dwp_file
->loaded_cus
,
12761 &find_dwo_cu
, INSERT
);
12764 return (struct dwo_unit
*) *slot
;
12766 /* Use a for loop so that we don't loop forever on bad debug info. */
12767 for (i
= 0; i
< dwp_htab
->nr_slots
; ++i
)
12769 ULONGEST signature_in_table
;
12771 signature_in_table
=
12772 read_8_bytes (dbfd
, dwp_htab
->hash_table
+ hash
* sizeof (uint64_t));
12773 if (signature_in_table
== signature
)
12775 uint32_t unit_index
=
12776 read_4_bytes (dbfd
,
12777 dwp_htab
->unit_table
+ hash
* sizeof (uint32_t));
12779 if (dwp_file
->version
== 1)
12781 *slot
= create_dwo_unit_in_dwp_v1 (dwarf2_per_objfile
,
12782 dwp_file
, unit_index
,
12783 comp_dir
, signature
,
12788 *slot
= create_dwo_unit_in_dwp_v2 (dwarf2_per_objfile
,
12789 dwp_file
, unit_index
,
12790 comp_dir
, signature
,
12793 return (struct dwo_unit
*) *slot
;
12795 if (signature_in_table
== 0)
12797 hash
= (hash
+ hash2
) & mask
;
12800 error (_("Dwarf Error: bad DWP hash table, lookup didn't terminate"
12801 " [in module %s]"),
12805 /* Subroutine of open_dwo_file,open_dwp_file to simplify them.
12806 Open the file specified by FILE_NAME and hand it off to BFD for
12807 preliminary analysis. Return a newly initialized bfd *, which
12808 includes a canonicalized copy of FILE_NAME.
12809 If IS_DWP is TRUE, we're opening a DWP file, otherwise a DWO file.
12810 SEARCH_CWD is true if the current directory is to be searched.
12811 It will be searched before debug-file-directory.
12812 If successful, the file is added to the bfd include table of the
12813 objfile's bfd (see gdb_bfd_record_inclusion).
12814 If unable to find/open the file, return NULL.
12815 NOTE: This function is derived from symfile_bfd_open. */
12817 static gdb_bfd_ref_ptr
12818 try_open_dwop_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12819 const char *file_name
, int is_dwp
, int search_cwd
)
12822 /* Blech. OPF_TRY_CWD_FIRST also disables searching the path list if
12823 FILE_NAME contains a '/'. So we can't use it. Instead prepend "."
12824 to debug_file_directory. */
12825 const char *search_path
;
12826 static const char dirname_separator_string
[] = { DIRNAME_SEPARATOR
, '\0' };
12828 gdb::unique_xmalloc_ptr
<char> search_path_holder
;
12831 if (*debug_file_directory
!= '\0')
12833 search_path_holder
.reset (concat (".", dirname_separator_string
,
12834 debug_file_directory
,
12836 search_path
= search_path_holder
.get ();
12842 search_path
= debug_file_directory
;
12844 openp_flags flags
= OPF_RETURN_REALPATH
;
12846 flags
|= OPF_SEARCH_IN_PATH
;
12848 gdb::unique_xmalloc_ptr
<char> absolute_name
;
12849 desc
= openp (search_path
, flags
, file_name
,
12850 O_RDONLY
| O_BINARY
, &absolute_name
);
12854 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (absolute_name
.get (),
12856 if (sym_bfd
== NULL
)
12858 bfd_set_cacheable (sym_bfd
.get (), 1);
12860 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
12863 /* Success. Record the bfd as having been included by the objfile's bfd.
12864 This is important because things like demangled_names_hash lives in the
12865 objfile's per_bfd space and may have references to things like symbol
12866 names that live in the DWO/DWP file's per_bfd space. PR 16426. */
12867 gdb_bfd_record_inclusion (dwarf2_per_objfile
->objfile
->obfd
, sym_bfd
.get ());
12872 /* Try to open DWO file FILE_NAME.
12873 COMP_DIR is the DW_AT_comp_dir attribute.
12874 The result is the bfd handle of the file.
12875 If there is a problem finding or opening the file, return NULL.
12876 Upon success, the canonicalized path of the file is stored in the bfd,
12877 same as symfile_bfd_open. */
12879 static gdb_bfd_ref_ptr
12880 open_dwo_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
12881 const char *file_name
, const char *comp_dir
)
12883 if (IS_ABSOLUTE_PATH (file_name
))
12884 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12885 0 /*is_dwp*/, 0 /*search_cwd*/);
12887 /* Before trying the search path, try DWO_NAME in COMP_DIR. */
12889 if (comp_dir
!= NULL
)
12891 char *path_to_try
= concat (comp_dir
, SLASH_STRING
,
12892 file_name
, (char *) NULL
);
12894 /* NOTE: If comp_dir is a relative path, this will also try the
12895 search path, which seems useful. */
12896 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
,
12899 1 /*search_cwd*/));
12900 xfree (path_to_try
);
12905 /* That didn't work, try debug-file-directory, which, despite its name,
12906 is a list of paths. */
12908 if (*debug_file_directory
== '\0')
12911 return try_open_dwop_file (dwarf2_per_objfile
, file_name
,
12912 0 /*is_dwp*/, 1 /*search_cwd*/);
12915 /* This function is mapped across the sections and remembers the offset and
12916 size of each of the DWO debugging sections we are interested in. */
12919 dwarf2_locate_dwo_sections (bfd
*abfd
, asection
*sectp
, void *dwo_sections_ptr
)
12921 struct dwo_sections
*dwo_sections
= (struct dwo_sections
*) dwo_sections_ptr
;
12922 const struct dwop_section_names
*names
= &dwop_section_names
;
12924 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
12926 dwo_sections
->abbrev
.s
.section
= sectp
;
12927 dwo_sections
->abbrev
.size
= bfd_get_section_size (sectp
);
12929 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
12931 dwo_sections
->info
.s
.section
= sectp
;
12932 dwo_sections
->info
.size
= bfd_get_section_size (sectp
);
12934 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
12936 dwo_sections
->line
.s
.section
= sectp
;
12937 dwo_sections
->line
.size
= bfd_get_section_size (sectp
);
12939 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
12941 dwo_sections
->loc
.s
.section
= sectp
;
12942 dwo_sections
->loc
.size
= bfd_get_section_size (sectp
);
12944 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
12946 dwo_sections
->macinfo
.s
.section
= sectp
;
12947 dwo_sections
->macinfo
.size
= bfd_get_section_size (sectp
);
12949 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
12951 dwo_sections
->macro
.s
.section
= sectp
;
12952 dwo_sections
->macro
.size
= bfd_get_section_size (sectp
);
12954 else if (section_is_p (sectp
->name
, &names
->str_dwo
))
12956 dwo_sections
->str
.s
.section
= sectp
;
12957 dwo_sections
->str
.size
= bfd_get_section_size (sectp
);
12959 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
12961 dwo_sections
->str_offsets
.s
.section
= sectp
;
12962 dwo_sections
->str_offsets
.size
= bfd_get_section_size (sectp
);
12964 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
12966 struct dwarf2_section_info type_section
;
12968 memset (&type_section
, 0, sizeof (type_section
));
12969 type_section
.s
.section
= sectp
;
12970 type_section
.size
= bfd_get_section_size (sectp
);
12971 VEC_safe_push (dwarf2_section_info_def
, dwo_sections
->types
,
12976 /* Initialize the use of the DWO file specified by DWO_NAME and referenced
12977 by PER_CU. This is for the non-DWP case.
12978 The result is NULL if DWO_NAME can't be found. */
12980 static struct dwo_file
*
12981 open_and_init_dwo_file (struct dwarf2_per_cu_data
*per_cu
,
12982 const char *dwo_name
, const char *comp_dir
)
12984 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
12985 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
12987 gdb_bfd_ref_ptr
dbfd (open_dwo_file (dwarf2_per_objfile
, dwo_name
, comp_dir
));
12990 if (dwarf_read_debug
)
12991 fprintf_unfiltered (gdb_stdlog
, "DWO file not found: %s\n", dwo_name
);
12995 /* We use a unique pointer here, despite the obstack allocation,
12996 because a dwo_file needs some cleanup if it is abandoned. */
12997 dwo_file_up
dwo_file (OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
12999 dwo_file
->dwo_name
= dwo_name
;
13000 dwo_file
->comp_dir
= comp_dir
;
13001 dwo_file
->dbfd
= dbfd
.release ();
13003 bfd_map_over_sections (dwo_file
->dbfd
, dwarf2_locate_dwo_sections
,
13004 &dwo_file
->sections
);
13006 create_cus_hash_table (dwarf2_per_objfile
, *dwo_file
, dwo_file
->sections
.info
,
13009 create_debug_types_hash_table (dwarf2_per_objfile
, dwo_file
.get (),
13010 dwo_file
->sections
.types
, dwo_file
->tus
);
13012 if (dwarf_read_debug
)
13013 fprintf_unfiltered (gdb_stdlog
, "DWO file found: %s\n", dwo_name
);
13015 return dwo_file
.release ();
13018 /* This function is mapped across the sections and remembers the offset and
13019 size of each of the DWP debugging sections common to version 1 and 2 that
13020 we are interested in. */
13023 dwarf2_locate_common_dwp_sections (bfd
*abfd
, asection
*sectp
,
13024 void *dwp_file_ptr
)
13026 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
13027 const struct dwop_section_names
*names
= &dwop_section_names
;
13028 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
13030 /* Record the ELF section number for later lookup: this is what the
13031 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
13032 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
13033 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
13035 /* Look for specific sections that we need. */
13036 if (section_is_p (sectp
->name
, &names
->str_dwo
))
13038 dwp_file
->sections
.str
.s
.section
= sectp
;
13039 dwp_file
->sections
.str
.size
= bfd_get_section_size (sectp
);
13041 else if (section_is_p (sectp
->name
, &names
->cu_index
))
13043 dwp_file
->sections
.cu_index
.s
.section
= sectp
;
13044 dwp_file
->sections
.cu_index
.size
= bfd_get_section_size (sectp
);
13046 else if (section_is_p (sectp
->name
, &names
->tu_index
))
13048 dwp_file
->sections
.tu_index
.s
.section
= sectp
;
13049 dwp_file
->sections
.tu_index
.size
= bfd_get_section_size (sectp
);
13053 /* This function is mapped across the sections and remembers the offset and
13054 size of each of the DWP version 2 debugging sections that we are interested
13055 in. This is split into a separate function because we don't know if we
13056 have version 1 or 2 until we parse the cu_index/tu_index sections. */
13059 dwarf2_locate_v2_dwp_sections (bfd
*abfd
, asection
*sectp
, void *dwp_file_ptr
)
13061 struct dwp_file
*dwp_file
= (struct dwp_file
*) dwp_file_ptr
;
13062 const struct dwop_section_names
*names
= &dwop_section_names
;
13063 unsigned int elf_section_nr
= elf_section_data (sectp
)->this_idx
;
13065 /* Record the ELF section number for later lookup: this is what the
13066 .debug_cu_index,.debug_tu_index tables use in DWP V1. */
13067 gdb_assert (elf_section_nr
< dwp_file
->num_sections
);
13068 dwp_file
->elf_sections
[elf_section_nr
] = sectp
;
13070 /* Look for specific sections that we need. */
13071 if (section_is_p (sectp
->name
, &names
->abbrev_dwo
))
13073 dwp_file
->sections
.abbrev
.s
.section
= sectp
;
13074 dwp_file
->sections
.abbrev
.size
= bfd_get_section_size (sectp
);
13076 else if (section_is_p (sectp
->name
, &names
->info_dwo
))
13078 dwp_file
->sections
.info
.s
.section
= sectp
;
13079 dwp_file
->sections
.info
.size
= bfd_get_section_size (sectp
);
13081 else if (section_is_p (sectp
->name
, &names
->line_dwo
))
13083 dwp_file
->sections
.line
.s
.section
= sectp
;
13084 dwp_file
->sections
.line
.size
= bfd_get_section_size (sectp
);
13086 else if (section_is_p (sectp
->name
, &names
->loc_dwo
))
13088 dwp_file
->sections
.loc
.s
.section
= sectp
;
13089 dwp_file
->sections
.loc
.size
= bfd_get_section_size (sectp
);
13091 else if (section_is_p (sectp
->name
, &names
->macinfo_dwo
))
13093 dwp_file
->sections
.macinfo
.s
.section
= sectp
;
13094 dwp_file
->sections
.macinfo
.size
= bfd_get_section_size (sectp
);
13096 else if (section_is_p (sectp
->name
, &names
->macro_dwo
))
13098 dwp_file
->sections
.macro
.s
.section
= sectp
;
13099 dwp_file
->sections
.macro
.size
= bfd_get_section_size (sectp
);
13101 else if (section_is_p (sectp
->name
, &names
->str_offsets_dwo
))
13103 dwp_file
->sections
.str_offsets
.s
.section
= sectp
;
13104 dwp_file
->sections
.str_offsets
.size
= bfd_get_section_size (sectp
);
13106 else if (section_is_p (sectp
->name
, &names
->types_dwo
))
13108 dwp_file
->sections
.types
.s
.section
= sectp
;
13109 dwp_file
->sections
.types
.size
= bfd_get_section_size (sectp
);
13113 /* Hash function for dwp_file loaded CUs/TUs. */
13116 hash_dwp_loaded_cutus (const void *item
)
13118 const struct dwo_unit
*dwo_unit
= (const struct dwo_unit
*) item
;
13120 /* This drops the top 32 bits of the signature, but is ok for a hash. */
13121 return dwo_unit
->signature
;
13124 /* Equality function for dwp_file loaded CUs/TUs. */
13127 eq_dwp_loaded_cutus (const void *a
, const void *b
)
13129 const struct dwo_unit
*dua
= (const struct dwo_unit
*) a
;
13130 const struct dwo_unit
*dub
= (const struct dwo_unit
*) b
;
13132 return dua
->signature
== dub
->signature
;
13135 /* Allocate a hash table for dwp_file loaded CUs/TUs. */
13138 allocate_dwp_loaded_cutus_table (struct objfile
*objfile
)
13140 return htab_create_alloc_ex (3,
13141 hash_dwp_loaded_cutus
,
13142 eq_dwp_loaded_cutus
,
13144 &objfile
->objfile_obstack
,
13145 hashtab_obstack_allocate
,
13146 dummy_obstack_deallocate
);
13149 /* Try to open DWP file FILE_NAME.
13150 The result is the bfd handle of the file.
13151 If there is a problem finding or opening the file, return NULL.
13152 Upon success, the canonicalized path of the file is stored in the bfd,
13153 same as symfile_bfd_open. */
13155 static gdb_bfd_ref_ptr
13156 open_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
13157 const char *file_name
)
13159 gdb_bfd_ref_ptr
abfd (try_open_dwop_file (dwarf2_per_objfile
, file_name
,
13161 1 /*search_cwd*/));
13165 /* Work around upstream bug 15652.
13166 http://sourceware.org/bugzilla/show_bug.cgi?id=15652
13167 [Whether that's a "bug" is debatable, but it is getting in our way.]
13168 We have no real idea where the dwp file is, because gdb's realpath-ing
13169 of the executable's path may have discarded the needed info.
13170 [IWBN if the dwp file name was recorded in the executable, akin to
13171 .gnu_debuglink, but that doesn't exist yet.]
13172 Strip the directory from FILE_NAME and search again. */
13173 if (*debug_file_directory
!= '\0')
13175 /* Don't implicitly search the current directory here.
13176 If the user wants to search "." to handle this case,
13177 it must be added to debug-file-directory. */
13178 return try_open_dwop_file (dwarf2_per_objfile
,
13179 lbasename (file_name
), 1 /*is_dwp*/,
13186 /* Initialize the use of the DWP file for the current objfile.
13187 By convention the name of the DWP file is ${objfile}.dwp.
13188 The result is NULL if it can't be found. */
13190 static std::unique_ptr
<struct dwp_file
>
13191 open_and_init_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13193 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13195 /* Try to find first .dwp for the binary file before any symbolic links
13198 /* If the objfile is a debug file, find the name of the real binary
13199 file and get the name of dwp file from there. */
13200 std::string dwp_name
;
13201 if (objfile
->separate_debug_objfile_backlink
!= NULL
)
13203 struct objfile
*backlink
= objfile
->separate_debug_objfile_backlink
;
13204 const char *backlink_basename
= lbasename (backlink
->original_name
);
13206 dwp_name
= ldirname (objfile
->original_name
) + SLASH_STRING
+ backlink_basename
;
13209 dwp_name
= objfile
->original_name
;
13211 dwp_name
+= ".dwp";
13213 gdb_bfd_ref_ptr
dbfd (open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ()));
13215 && strcmp (objfile
->original_name
, objfile_name (objfile
)) != 0)
13217 /* Try to find .dwp for the binary file after gdb_realpath resolving. */
13218 dwp_name
= objfile_name (objfile
);
13219 dwp_name
+= ".dwp";
13220 dbfd
= open_dwp_file (dwarf2_per_objfile
, dwp_name
.c_str ());
13225 if (dwarf_read_debug
)
13226 fprintf_unfiltered (gdb_stdlog
, "DWP file not found: %s\n", dwp_name
.c_str ());
13227 return std::unique_ptr
<dwp_file
> ();
13230 const char *name
= bfd_get_filename (dbfd
.get ());
13231 std::unique_ptr
<struct dwp_file
> dwp_file
13232 (new struct dwp_file (name
, std::move (dbfd
)));
13234 dwp_file
->num_sections
= elf_numsections (dwp_file
->dbfd
);
13235 dwp_file
->elf_sections
=
13236 OBSTACK_CALLOC (&objfile
->objfile_obstack
,
13237 dwp_file
->num_sections
, asection
*);
13239 bfd_map_over_sections (dwp_file
->dbfd
.get (),
13240 dwarf2_locate_common_dwp_sections
,
13243 dwp_file
->cus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
13246 dwp_file
->tus
= create_dwp_hash_table (dwarf2_per_objfile
, dwp_file
.get (),
13249 /* The DWP file version is stored in the hash table. Oh well. */
13250 if (dwp_file
->cus
&& dwp_file
->tus
13251 && dwp_file
->cus
->version
!= dwp_file
->tus
->version
)
13253 /* Technically speaking, we should try to limp along, but this is
13254 pretty bizarre. We use pulongest here because that's the established
13255 portability solution (e.g, we cannot use %u for uint32_t). */
13256 error (_("Dwarf Error: DWP file CU version %s doesn't match"
13257 " TU version %s [in DWP file %s]"),
13258 pulongest (dwp_file
->cus
->version
),
13259 pulongest (dwp_file
->tus
->version
), dwp_name
.c_str ());
13263 dwp_file
->version
= dwp_file
->cus
->version
;
13264 else if (dwp_file
->tus
)
13265 dwp_file
->version
= dwp_file
->tus
->version
;
13267 dwp_file
->version
= 2;
13269 if (dwp_file
->version
== 2)
13270 bfd_map_over_sections (dwp_file
->dbfd
.get (),
13271 dwarf2_locate_v2_dwp_sections
,
13274 dwp_file
->loaded_cus
= allocate_dwp_loaded_cutus_table (objfile
);
13275 dwp_file
->loaded_tus
= allocate_dwp_loaded_cutus_table (objfile
);
13277 if (dwarf_read_debug
)
13279 fprintf_unfiltered (gdb_stdlog
, "DWP file found: %s\n", dwp_file
->name
);
13280 fprintf_unfiltered (gdb_stdlog
,
13281 " %s CUs, %s TUs\n",
13282 pulongest (dwp_file
->cus
? dwp_file
->cus
->nr_units
: 0),
13283 pulongest (dwp_file
->tus
? dwp_file
->tus
->nr_units
: 0));
13289 /* Wrapper around open_and_init_dwp_file, only open it once. */
13291 static struct dwp_file
*
13292 get_dwp_file (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
13294 if (! dwarf2_per_objfile
->dwp_checked
)
13296 dwarf2_per_objfile
->dwp_file
13297 = open_and_init_dwp_file (dwarf2_per_objfile
);
13298 dwarf2_per_objfile
->dwp_checked
= 1;
13300 return dwarf2_per_objfile
->dwp_file
.get ();
13303 /* Subroutine of lookup_dwo_comp_unit, lookup_dwo_type_unit.
13304 Look up the CU/TU with signature SIGNATURE, either in DWO file DWO_NAME
13305 or in the DWP file for the objfile, referenced by THIS_UNIT.
13306 If non-NULL, comp_dir is the DW_AT_comp_dir attribute.
13307 IS_DEBUG_TYPES is non-zero if reading a TU, otherwise read a CU.
13309 This is called, for example, when wanting to read a variable with a
13310 complex location. Therefore we don't want to do file i/o for every call.
13311 Therefore we don't want to look for a DWO file on every call.
13312 Therefore we first see if we've already seen SIGNATURE in a DWP file,
13313 then we check if we've already seen DWO_NAME, and only THEN do we check
13316 The result is a pointer to the dwo_unit object or NULL if we didn't find it
13317 (dwo_id mismatch or couldn't find the DWO/DWP file). */
13319 static struct dwo_unit
*
13320 lookup_dwo_cutu (struct dwarf2_per_cu_data
*this_unit
,
13321 const char *dwo_name
, const char *comp_dir
,
13322 ULONGEST signature
, int is_debug_types
)
13324 struct dwarf2_per_objfile
*dwarf2_per_objfile
= this_unit
->dwarf2_per_objfile
;
13325 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
13326 const char *kind
= is_debug_types
? "TU" : "CU";
13327 void **dwo_file_slot
;
13328 struct dwo_file
*dwo_file
;
13329 struct dwp_file
*dwp_file
;
13331 /* First see if there's a DWP file.
13332 If we have a DWP file but didn't find the DWO inside it, don't
13333 look for the original DWO file. It makes gdb behave differently
13334 depending on whether one is debugging in the build tree. */
13336 dwp_file
= get_dwp_file (dwarf2_per_objfile
);
13337 if (dwp_file
!= NULL
)
13339 const struct dwp_hash_table
*dwp_htab
=
13340 is_debug_types
? dwp_file
->tus
: dwp_file
->cus
;
13342 if (dwp_htab
!= NULL
)
13344 struct dwo_unit
*dwo_cutu
=
13345 lookup_dwo_unit_in_dwp (dwarf2_per_objfile
, dwp_file
, comp_dir
,
13346 signature
, is_debug_types
);
13348 if (dwo_cutu
!= NULL
)
13350 if (dwarf_read_debug
)
13352 fprintf_unfiltered (gdb_stdlog
,
13353 "Virtual DWO %s %s found: @%s\n",
13354 kind
, hex_string (signature
),
13355 host_address_to_string (dwo_cutu
));
13363 /* No DWP file, look for the DWO file. */
13365 dwo_file_slot
= lookup_dwo_file_slot (dwarf2_per_objfile
,
13366 dwo_name
, comp_dir
);
13367 if (*dwo_file_slot
== NULL
)
13369 /* Read in the file and build a table of the CUs/TUs it contains. */
13370 *dwo_file_slot
= open_and_init_dwo_file (this_unit
, dwo_name
, comp_dir
);
13372 /* NOTE: This will be NULL if unable to open the file. */
13373 dwo_file
= (struct dwo_file
*) *dwo_file_slot
;
13375 if (dwo_file
!= NULL
)
13377 struct dwo_unit
*dwo_cutu
= NULL
;
13379 if (is_debug_types
&& dwo_file
->tus
)
13381 struct dwo_unit find_dwo_cutu
;
13383 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13384 find_dwo_cutu
.signature
= signature
;
13386 = (struct dwo_unit
*) htab_find (dwo_file
->tus
, &find_dwo_cutu
);
13388 else if (!is_debug_types
&& dwo_file
->cus
)
13390 struct dwo_unit find_dwo_cutu
;
13392 memset (&find_dwo_cutu
, 0, sizeof (find_dwo_cutu
));
13393 find_dwo_cutu
.signature
= signature
;
13394 dwo_cutu
= (struct dwo_unit
*)htab_find (dwo_file
->cus
,
13398 if (dwo_cutu
!= NULL
)
13400 if (dwarf_read_debug
)
13402 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) found: @%s\n",
13403 kind
, dwo_name
, hex_string (signature
),
13404 host_address_to_string (dwo_cutu
));
13411 /* We didn't find it. This could mean a dwo_id mismatch, or
13412 someone deleted the DWO/DWP file, or the search path isn't set up
13413 correctly to find the file. */
13415 if (dwarf_read_debug
)
13417 fprintf_unfiltered (gdb_stdlog
, "DWO %s %s(%s) not found\n",
13418 kind
, dwo_name
, hex_string (signature
));
13421 /* This is a warning and not a complaint because it can be caused by
13422 pilot error (e.g., user accidentally deleting the DWO). */
13424 /* Print the name of the DWP file if we looked there, helps the user
13425 better diagnose the problem. */
13426 std::string dwp_text
;
13428 if (dwp_file
!= NULL
)
13429 dwp_text
= string_printf (" [in DWP file %s]",
13430 lbasename (dwp_file
->name
));
13432 warning (_("Could not find DWO %s %s(%s)%s referenced by %s at offset %s"
13433 " [in module %s]"),
13434 kind
, dwo_name
, hex_string (signature
),
13436 this_unit
->is_debug_types
? "TU" : "CU",
13437 sect_offset_str (this_unit
->sect_off
), objfile_name (objfile
));
13442 /* Lookup the DWO CU DWO_NAME/SIGNATURE referenced from THIS_CU.
13443 See lookup_dwo_cutu_unit for details. */
13445 static struct dwo_unit
*
13446 lookup_dwo_comp_unit (struct dwarf2_per_cu_data
*this_cu
,
13447 const char *dwo_name
, const char *comp_dir
,
13448 ULONGEST signature
)
13450 return lookup_dwo_cutu (this_cu
, dwo_name
, comp_dir
, signature
, 0);
13453 /* Lookup the DWO TU DWO_NAME/SIGNATURE referenced from THIS_TU.
13454 See lookup_dwo_cutu_unit for details. */
13456 static struct dwo_unit
*
13457 lookup_dwo_type_unit (struct signatured_type
*this_tu
,
13458 const char *dwo_name
, const char *comp_dir
)
13460 return lookup_dwo_cutu (&this_tu
->per_cu
, dwo_name
, comp_dir
, this_tu
->signature
, 1);
13463 /* Traversal function for queue_and_load_all_dwo_tus. */
13466 queue_and_load_dwo_tu (void **slot
, void *info
)
13468 struct dwo_unit
*dwo_unit
= (struct dwo_unit
*) *slot
;
13469 struct dwarf2_per_cu_data
*per_cu
= (struct dwarf2_per_cu_data
*) info
;
13470 ULONGEST signature
= dwo_unit
->signature
;
13471 struct signatured_type
*sig_type
=
13472 lookup_dwo_signatured_type (per_cu
->cu
, signature
);
13474 if (sig_type
!= NULL
)
13476 struct dwarf2_per_cu_data
*sig_cu
= &sig_type
->per_cu
;
13478 /* We pass NULL for DEPENDENT_CU because we don't yet know if there's
13479 a real dependency of PER_CU on SIG_TYPE. That is detected later
13480 while processing PER_CU. */
13481 if (maybe_queue_comp_unit (NULL
, sig_cu
, per_cu
->cu
->language
))
13482 load_full_type_unit (sig_cu
);
13483 VEC_safe_push (dwarf2_per_cu_ptr
, per_cu
->imported_symtabs
, sig_cu
);
13489 /* Queue all TUs contained in the DWO of PER_CU to be read in.
13490 The DWO may have the only definition of the type, though it may not be
13491 referenced anywhere in PER_CU. Thus we have to load *all* its TUs.
13492 http://sourceware.org/bugzilla/show_bug.cgi?id=15021 */
13495 queue_and_load_all_dwo_tus (struct dwarf2_per_cu_data
*per_cu
)
13497 struct dwo_unit
*dwo_unit
;
13498 struct dwo_file
*dwo_file
;
13500 gdb_assert (!per_cu
->is_debug_types
);
13501 gdb_assert (get_dwp_file (per_cu
->dwarf2_per_objfile
) == NULL
);
13502 gdb_assert (per_cu
->cu
!= NULL
);
13504 dwo_unit
= per_cu
->cu
->dwo_unit
;
13505 gdb_assert (dwo_unit
!= NULL
);
13507 dwo_file
= dwo_unit
->dwo_file
;
13508 if (dwo_file
->tus
!= NULL
)
13509 htab_traverse_noresize (dwo_file
->tus
, queue_and_load_dwo_tu
, per_cu
);
13512 /* Free all resources associated with DWO_FILE.
13513 Close the DWO file and munmap the sections. */
13516 free_dwo_file (struct dwo_file
*dwo_file
)
13518 /* Note: dbfd is NULL for virtual DWO files. */
13519 gdb_bfd_unref (dwo_file
->dbfd
);
13521 VEC_free (dwarf2_section_info_def
, dwo_file
->sections
.types
);
13524 /* Traversal function for free_dwo_files. */
13527 free_dwo_file_from_slot (void **slot
, void *info
)
13529 struct dwo_file
*dwo_file
= (struct dwo_file
*) *slot
;
13531 free_dwo_file (dwo_file
);
13536 /* Free all resources associated with DWO_FILES. */
13539 free_dwo_files (htab_t dwo_files
, struct objfile
*objfile
)
13541 htab_traverse_noresize (dwo_files
, free_dwo_file_from_slot
, objfile
);
13544 /* Read in various DIEs. */
13546 /* DW_AT_abstract_origin inherits whole DIEs (not just their attributes).
13547 Inherit only the children of the DW_AT_abstract_origin DIE not being
13548 already referenced by DW_AT_abstract_origin from the children of the
13552 inherit_abstract_dies (struct die_info
*die
, struct dwarf2_cu
*cu
)
13554 struct die_info
*child_die
;
13555 sect_offset
*offsetp
;
13556 /* Parent of DIE - referenced by DW_AT_abstract_origin. */
13557 struct die_info
*origin_die
;
13558 /* Iterator of the ORIGIN_DIE children. */
13559 struct die_info
*origin_child_die
;
13560 struct attribute
*attr
;
13561 struct dwarf2_cu
*origin_cu
;
13562 struct pending
**origin_previous_list_in_scope
;
13564 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
13568 /* Note that following die references may follow to a die in a
13572 origin_die
= follow_die_ref (die
, attr
, &origin_cu
);
13574 /* We're inheriting ORIGIN's children into the scope we'd put DIE's
13576 origin_previous_list_in_scope
= origin_cu
->list_in_scope
;
13577 origin_cu
->list_in_scope
= cu
->list_in_scope
;
13579 if (die
->tag
!= origin_die
->tag
13580 && !(die
->tag
== DW_TAG_inlined_subroutine
13581 && origin_die
->tag
== DW_TAG_subprogram
))
13582 complaint (_("DIE %s and its abstract origin %s have different tags"),
13583 sect_offset_str (die
->sect_off
),
13584 sect_offset_str (origin_die
->sect_off
));
13586 std::vector
<sect_offset
> offsets
;
13588 for (child_die
= die
->child
;
13589 child_die
&& child_die
->tag
;
13590 child_die
= sibling_die (child_die
))
13592 struct die_info
*child_origin_die
;
13593 struct dwarf2_cu
*child_origin_cu
;
13595 /* We are trying to process concrete instance entries:
13596 DW_TAG_call_site DIEs indeed have a DW_AT_abstract_origin tag, but
13597 it's not relevant to our analysis here. i.e. detecting DIEs that are
13598 present in the abstract instance but not referenced in the concrete
13600 if (child_die
->tag
== DW_TAG_call_site
13601 || child_die
->tag
== DW_TAG_GNU_call_site
)
13604 /* For each CHILD_DIE, find the corresponding child of
13605 ORIGIN_DIE. If there is more than one layer of
13606 DW_AT_abstract_origin, follow them all; there shouldn't be,
13607 but GCC versions at least through 4.4 generate this (GCC PR
13609 child_origin_die
= child_die
;
13610 child_origin_cu
= cu
;
13613 attr
= dwarf2_attr (child_origin_die
, DW_AT_abstract_origin
,
13617 child_origin_die
= follow_die_ref (child_origin_die
, attr
,
13621 /* According to DWARF3 3.3.8.2 #3 new entries without their abstract
13622 counterpart may exist. */
13623 if (child_origin_die
!= child_die
)
13625 if (child_die
->tag
!= child_origin_die
->tag
13626 && !(child_die
->tag
== DW_TAG_inlined_subroutine
13627 && child_origin_die
->tag
== DW_TAG_subprogram
))
13628 complaint (_("Child DIE %s and its abstract origin %s have "
13630 sect_offset_str (child_die
->sect_off
),
13631 sect_offset_str (child_origin_die
->sect_off
));
13632 if (child_origin_die
->parent
!= origin_die
)
13633 complaint (_("Child DIE %s and its abstract origin %s have "
13634 "different parents"),
13635 sect_offset_str (child_die
->sect_off
),
13636 sect_offset_str (child_origin_die
->sect_off
));
13638 offsets
.push_back (child_origin_die
->sect_off
);
13641 std::sort (offsets
.begin (), offsets
.end ());
13642 sect_offset
*offsets_end
= offsets
.data () + offsets
.size ();
13643 for (offsetp
= offsets
.data () + 1; offsetp
< offsets_end
; offsetp
++)
13644 if (offsetp
[-1] == *offsetp
)
13645 complaint (_("Multiple children of DIE %s refer "
13646 "to DIE %s as their abstract origin"),
13647 sect_offset_str (die
->sect_off
), sect_offset_str (*offsetp
));
13649 offsetp
= offsets
.data ();
13650 origin_child_die
= origin_die
->child
;
13651 while (origin_child_die
&& origin_child_die
->tag
)
13653 /* Is ORIGIN_CHILD_DIE referenced by any of the DIE children? */
13654 while (offsetp
< offsets_end
13655 && *offsetp
< origin_child_die
->sect_off
)
13657 if (offsetp
>= offsets_end
13658 || *offsetp
> origin_child_die
->sect_off
)
13660 /* Found that ORIGIN_CHILD_DIE is really not referenced.
13661 Check whether we're already processing ORIGIN_CHILD_DIE.
13662 This can happen with mutually referenced abstract_origins.
13664 if (!origin_child_die
->in_process
)
13665 process_die (origin_child_die
, origin_cu
);
13667 origin_child_die
= sibling_die (origin_child_die
);
13669 origin_cu
->list_in_scope
= origin_previous_list_in_scope
;
13673 read_func_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13675 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13676 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13677 struct context_stack
*newobj
;
13680 struct die_info
*child_die
;
13681 struct attribute
*attr
, *call_line
, *call_file
;
13683 CORE_ADDR baseaddr
;
13684 struct block
*block
;
13685 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
13686 std::vector
<struct symbol
*> template_args
;
13687 struct template_symbol
*templ_func
= NULL
;
13691 /* If we do not have call site information, we can't show the
13692 caller of this inlined function. That's too confusing, so
13693 only use the scope for local variables. */
13694 call_line
= dwarf2_attr (die
, DW_AT_call_line
, cu
);
13695 call_file
= dwarf2_attr (die
, DW_AT_call_file
, cu
);
13696 if (call_line
== NULL
|| call_file
== NULL
)
13698 read_lexical_block_scope (die
, cu
);
13703 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13705 name
= dwarf2_name (die
, cu
);
13707 /* Ignore functions with missing or empty names. These are actually
13708 illegal according to the DWARF standard. */
13711 complaint (_("missing name for subprogram DIE at %s"),
13712 sect_offset_str (die
->sect_off
));
13716 /* Ignore functions with missing or invalid low and high pc attributes. */
13717 if (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
)
13718 <= PC_BOUNDS_INVALID
)
13720 attr
= dwarf2_attr (die
, DW_AT_external
, cu
);
13721 if (!attr
|| !DW_UNSND (attr
))
13722 complaint (_("cannot get low and high bounds "
13723 "for subprogram DIE at %s"),
13724 sect_offset_str (die
->sect_off
));
13728 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13729 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13731 /* If we have any template arguments, then we must allocate a
13732 different sort of symbol. */
13733 for (child_die
= die
->child
; child_die
; child_die
= sibling_die (child_die
))
13735 if (child_die
->tag
== DW_TAG_template_type_param
13736 || child_die
->tag
== DW_TAG_template_value_param
)
13738 templ_func
= allocate_template_symbol (objfile
);
13739 templ_func
->subclass
= SYMBOL_TEMPLATE
;
13744 newobj
= cu
->get_builder ()->push_context (0, lowpc
);
13745 newobj
->name
= new_symbol (die
, read_type_die (die
, cu
), cu
,
13746 (struct symbol
*) templ_func
);
13748 /* If there is a location expression for DW_AT_frame_base, record
13750 attr
= dwarf2_attr (die
, DW_AT_frame_base
, cu
);
13752 dwarf2_symbol_mark_computed (attr
, newobj
->name
, cu
, 1);
13754 /* If there is a location for the static link, record it. */
13755 newobj
->static_link
= NULL
;
13756 attr
= dwarf2_attr (die
, DW_AT_static_link
, cu
);
13759 newobj
->static_link
13760 = XOBNEW (&objfile
->objfile_obstack
, struct dynamic_prop
);
13761 attr_to_dynamic_prop (attr
, die
, cu
, newobj
->static_link
);
13764 cu
->list_in_scope
= cu
->get_builder ()->get_local_symbols ();
13766 if (die
->child
!= NULL
)
13768 child_die
= die
->child
;
13769 while (child_die
&& child_die
->tag
)
13771 if (child_die
->tag
== DW_TAG_template_type_param
13772 || child_die
->tag
== DW_TAG_template_value_param
)
13774 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
13777 template_args
.push_back (arg
);
13780 process_die (child_die
, cu
);
13781 child_die
= sibling_die (child_die
);
13785 inherit_abstract_dies (die
, cu
);
13787 /* If we have a DW_AT_specification, we might need to import using
13788 directives from the context of the specification DIE. See the
13789 comment in determine_prefix. */
13790 if (cu
->language
== language_cplus
13791 && dwarf2_attr (die
, DW_AT_specification
, cu
))
13793 struct dwarf2_cu
*spec_cu
= cu
;
13794 struct die_info
*spec_die
= die_specification (die
, &spec_cu
);
13798 child_die
= spec_die
->child
;
13799 while (child_die
&& child_die
->tag
)
13801 if (child_die
->tag
== DW_TAG_imported_module
)
13802 process_die (child_die
, spec_cu
);
13803 child_die
= sibling_die (child_die
);
13806 /* In some cases, GCC generates specification DIEs that
13807 themselves contain DW_AT_specification attributes. */
13808 spec_die
= die_specification (spec_die
, &spec_cu
);
13812 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13813 /* Make a block for the local symbols within. */
13814 block
= cu
->get_builder ()->finish_block (cstk
.name
, cstk
.old_blocks
,
13815 cstk
.static_link
, lowpc
, highpc
);
13817 /* For C++, set the block's scope. */
13818 if ((cu
->language
== language_cplus
13819 || cu
->language
== language_fortran
13820 || cu
->language
== language_d
13821 || cu
->language
== language_rust
)
13822 && cu
->processing_has_namespace_info
)
13823 block_set_scope (block
, determine_prefix (die
, cu
),
13824 &objfile
->objfile_obstack
);
13826 /* If we have address ranges, record them. */
13827 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13829 gdbarch_make_symbol_special (gdbarch
, cstk
.name
, objfile
);
13831 /* Attach template arguments to function. */
13832 if (!template_args
.empty ())
13834 gdb_assert (templ_func
!= NULL
);
13836 templ_func
->n_template_arguments
= template_args
.size ();
13837 templ_func
->template_arguments
13838 = XOBNEWVEC (&objfile
->objfile_obstack
, struct symbol
*,
13839 templ_func
->n_template_arguments
);
13840 memcpy (templ_func
->template_arguments
,
13841 template_args
.data (),
13842 (templ_func
->n_template_arguments
* sizeof (struct symbol
*)));
13844 /* Make sure that the symtab is set on the new symbols. Even
13845 though they don't appear in this symtab directly, other parts
13846 of gdb assume that symbols do, and this is reasonably
13848 for (symbol
*sym
: template_args
)
13849 symbol_set_symtab (sym
, symbol_symtab (templ_func
));
13852 /* In C++, we can have functions nested inside functions (e.g., when
13853 a function declares a class that has methods). This means that
13854 when we finish processing a function scope, we may need to go
13855 back to building a containing block's symbol lists. */
13856 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13857 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13859 /* If we've finished processing a top-level function, subsequent
13860 symbols go in the file symbol list. */
13861 if (cu
->get_builder ()->outermost_context_p ())
13862 cu
->list_in_scope
= cu
->get_builder ()->get_file_symbols ();
13865 /* Process all the DIES contained within a lexical block scope. Start
13866 a new scope, process the dies, and then close the scope. */
13869 read_lexical_block_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13871 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13872 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13873 CORE_ADDR lowpc
, highpc
;
13874 struct die_info
*child_die
;
13875 CORE_ADDR baseaddr
;
13877 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13879 /* Ignore blocks with missing or invalid low and high pc attributes. */
13880 /* ??? Perhaps consider discontiguous blocks defined by DW_AT_ranges
13881 as multiple lexical blocks? Handling children in a sane way would
13882 be nasty. Might be easier to properly extend generic blocks to
13883 describe ranges. */
13884 switch (dwarf2_get_pc_bounds (die
, &lowpc
, &highpc
, cu
, NULL
))
13886 case PC_BOUNDS_NOT_PRESENT
:
13887 /* DW_TAG_lexical_block has no attributes, process its children as if
13888 there was no wrapping by that DW_TAG_lexical_block.
13889 GCC does no longer produces such DWARF since GCC r224161. */
13890 for (child_die
= die
->child
;
13891 child_die
!= NULL
&& child_die
->tag
;
13892 child_die
= sibling_die (child_die
))
13893 process_die (child_die
, cu
);
13895 case PC_BOUNDS_INVALID
:
13898 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
13899 highpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, highpc
+ baseaddr
);
13901 cu
->get_builder ()->push_context (0, lowpc
);
13902 if (die
->child
!= NULL
)
13904 child_die
= die
->child
;
13905 while (child_die
&& child_die
->tag
)
13907 process_die (child_die
, cu
);
13908 child_die
= sibling_die (child_die
);
13911 inherit_abstract_dies (die
, cu
);
13912 struct context_stack cstk
= cu
->get_builder ()->pop_context ();
13914 if (*cu
->get_builder ()->get_local_symbols () != NULL
13915 || (*cu
->get_builder ()->get_local_using_directives ()) != NULL
)
13917 struct block
*block
13918 = cu
->get_builder ()->finish_block (0, cstk
.old_blocks
, NULL
,
13919 cstk
.start_addr
, highpc
);
13921 /* Note that recording ranges after traversing children, as we
13922 do here, means that recording a parent's ranges entails
13923 walking across all its children's ranges as they appear in
13924 the address map, which is quadratic behavior.
13926 It would be nicer to record the parent's ranges before
13927 traversing its children, simply overriding whatever you find
13928 there. But since we don't even decide whether to create a
13929 block until after we've traversed its children, that's hard
13931 dwarf2_record_block_ranges (die
, block
, baseaddr
, cu
);
13933 *cu
->get_builder ()->get_local_symbols () = cstk
.locals
;
13934 cu
->get_builder ()->set_local_using_directives (cstk
.local_using_directives
);
13937 /* Read in DW_TAG_call_site and insert it to CU->call_site_htab. */
13940 read_call_site_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
13942 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
13943 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
13944 CORE_ADDR pc
, baseaddr
;
13945 struct attribute
*attr
;
13946 struct call_site
*call_site
, call_site_local
;
13949 struct die_info
*child_die
;
13951 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
13953 attr
= dwarf2_attr (die
, DW_AT_call_return_pc
, cu
);
13956 /* This was a pre-DWARF-5 GNU extension alias
13957 for DW_AT_call_return_pc. */
13958 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
13962 complaint (_("missing DW_AT_call_return_pc for DW_TAG_call_site "
13963 "DIE %s [in module %s]"),
13964 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
13967 pc
= attr_value_as_address (attr
) + baseaddr
;
13968 pc
= gdbarch_adjust_dwarf2_addr (gdbarch
, pc
);
13970 if (cu
->call_site_htab
== NULL
)
13971 cu
->call_site_htab
= htab_create_alloc_ex (16, core_addr_hash
, core_addr_eq
,
13972 NULL
, &objfile
->objfile_obstack
,
13973 hashtab_obstack_allocate
, NULL
);
13974 call_site_local
.pc
= pc
;
13975 slot
= htab_find_slot (cu
->call_site_htab
, &call_site_local
, INSERT
);
13978 complaint (_("Duplicate PC %s for DW_TAG_call_site "
13979 "DIE %s [in module %s]"),
13980 paddress (gdbarch
, pc
), sect_offset_str (die
->sect_off
),
13981 objfile_name (objfile
));
13985 /* Count parameters at the caller. */
13988 for (child_die
= die
->child
; child_die
&& child_die
->tag
;
13989 child_die
= sibling_die (child_die
))
13991 if (child_die
->tag
!= DW_TAG_call_site_parameter
13992 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
13994 complaint (_("Tag %d is not DW_TAG_call_site_parameter in "
13995 "DW_TAG_call_site child DIE %s [in module %s]"),
13996 child_die
->tag
, sect_offset_str (child_die
->sect_off
),
13997 objfile_name (objfile
));
14005 = ((struct call_site
*)
14006 obstack_alloc (&objfile
->objfile_obstack
,
14007 sizeof (*call_site
)
14008 + (sizeof (*call_site
->parameter
) * (nparams
- 1))));
14010 memset (call_site
, 0, sizeof (*call_site
) - sizeof (*call_site
->parameter
));
14011 call_site
->pc
= pc
;
14013 if (dwarf2_flag_true_p (die
, DW_AT_call_tail_call
, cu
)
14014 || dwarf2_flag_true_p (die
, DW_AT_GNU_tail_call
, cu
))
14016 struct die_info
*func_die
;
14018 /* Skip also over DW_TAG_inlined_subroutine. */
14019 for (func_die
= die
->parent
;
14020 func_die
&& func_die
->tag
!= DW_TAG_subprogram
14021 && func_die
->tag
!= DW_TAG_subroutine_type
;
14022 func_die
= func_die
->parent
);
14024 /* DW_AT_call_all_calls is a superset
14025 of DW_AT_call_all_tail_calls. */
14027 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_calls
, cu
)
14028 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_call_sites
, cu
)
14029 && !dwarf2_flag_true_p (func_die
, DW_AT_call_all_tail_calls
, cu
)
14030 && !dwarf2_flag_true_p (func_die
, DW_AT_GNU_all_tail_call_sites
, cu
))
14032 /* TYPE_TAIL_CALL_LIST is not interesting in functions where it is
14033 not complete. But keep CALL_SITE for look ups via call_site_htab,
14034 both the initial caller containing the real return address PC and
14035 the final callee containing the current PC of a chain of tail
14036 calls do not need to have the tail call list complete. But any
14037 function candidate for a virtual tail call frame searched via
14038 TYPE_TAIL_CALL_LIST must have the tail call list complete to be
14039 determined unambiguously. */
14043 struct type
*func_type
= NULL
;
14046 func_type
= get_die_type (func_die
, cu
);
14047 if (func_type
!= NULL
)
14049 gdb_assert (TYPE_CODE (func_type
) == TYPE_CODE_FUNC
);
14051 /* Enlist this call site to the function. */
14052 call_site
->tail_call_next
= TYPE_TAIL_CALL_LIST (func_type
);
14053 TYPE_TAIL_CALL_LIST (func_type
) = call_site
;
14056 complaint (_("Cannot find function owning DW_TAG_call_site "
14057 "DIE %s [in module %s]"),
14058 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14062 attr
= dwarf2_attr (die
, DW_AT_call_target
, cu
);
14064 attr
= dwarf2_attr (die
, DW_AT_GNU_call_site_target
, cu
);
14066 attr
= dwarf2_attr (die
, DW_AT_call_origin
, cu
);
14069 /* This was a pre-DWARF-5 GNU extension alias for DW_AT_call_origin. */
14070 attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
14072 SET_FIELD_DWARF_BLOCK (call_site
->target
, NULL
);
14073 if (!attr
|| (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0))
14074 /* Keep NULL DWARF_BLOCK. */;
14075 else if (attr_form_is_block (attr
))
14077 struct dwarf2_locexpr_baton
*dlbaton
;
14079 dlbaton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
14080 dlbaton
->data
= DW_BLOCK (attr
)->data
;
14081 dlbaton
->size
= DW_BLOCK (attr
)->size
;
14082 dlbaton
->per_cu
= cu
->per_cu
;
14084 SET_FIELD_DWARF_BLOCK (call_site
->target
, dlbaton
);
14086 else if (attr_form_is_ref (attr
))
14088 struct dwarf2_cu
*target_cu
= cu
;
14089 struct die_info
*target_die
;
14091 target_die
= follow_die_ref (die
, attr
, &target_cu
);
14092 gdb_assert (target_cu
->per_cu
->dwarf2_per_objfile
->objfile
== objfile
);
14093 if (die_is_declaration (target_die
, target_cu
))
14095 const char *target_physname
;
14097 /* Prefer the mangled name; otherwise compute the demangled one. */
14098 target_physname
= dw2_linkage_name (target_die
, target_cu
);
14099 if (target_physname
== NULL
)
14100 target_physname
= dwarf2_physname (NULL
, target_die
, target_cu
);
14101 if (target_physname
== NULL
)
14102 complaint (_("DW_AT_call_target target DIE has invalid "
14103 "physname, for referencing DIE %s [in module %s]"),
14104 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14106 SET_FIELD_PHYSNAME (call_site
->target
, target_physname
);
14112 /* DW_AT_entry_pc should be preferred. */
14113 if (dwarf2_get_pc_bounds (target_die
, &lowpc
, NULL
, target_cu
, NULL
)
14114 <= PC_BOUNDS_INVALID
)
14115 complaint (_("DW_AT_call_target target DIE has invalid "
14116 "low pc, for referencing DIE %s [in module %s]"),
14117 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14120 lowpc
= gdbarch_adjust_dwarf2_addr (gdbarch
, lowpc
+ baseaddr
);
14121 SET_FIELD_PHYSADDR (call_site
->target
, lowpc
);
14126 complaint (_("DW_TAG_call_site DW_AT_call_target is neither "
14127 "block nor reference, for DIE %s [in module %s]"),
14128 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
14130 call_site
->per_cu
= cu
->per_cu
;
14132 for (child_die
= die
->child
;
14133 child_die
&& child_die
->tag
;
14134 child_die
= sibling_die (child_die
))
14136 struct call_site_parameter
*parameter
;
14137 struct attribute
*loc
, *origin
;
14139 if (child_die
->tag
!= DW_TAG_call_site_parameter
14140 && child_die
->tag
!= DW_TAG_GNU_call_site_parameter
)
14142 /* Already printed the complaint above. */
14146 gdb_assert (call_site
->parameter_count
< nparams
);
14147 parameter
= &call_site
->parameter
[call_site
->parameter_count
];
14149 /* DW_AT_location specifies the register number or DW_AT_abstract_origin
14150 specifies DW_TAG_formal_parameter. Value of the data assumed for the
14151 register is contained in DW_AT_call_value. */
14153 loc
= dwarf2_attr (child_die
, DW_AT_location
, cu
);
14154 origin
= dwarf2_attr (child_die
, DW_AT_call_parameter
, cu
);
14155 if (origin
== NULL
)
14157 /* This was a pre-DWARF-5 GNU extension alias
14158 for DW_AT_call_parameter. */
14159 origin
= dwarf2_attr (child_die
, DW_AT_abstract_origin
, cu
);
14161 if (loc
== NULL
&& origin
!= NULL
&& attr_form_is_ref (origin
))
14163 parameter
->kind
= CALL_SITE_PARAMETER_PARAM_OFFSET
;
14165 sect_offset sect_off
14166 = (sect_offset
) dwarf2_get_ref_die_offset (origin
);
14167 if (!offset_in_cu_p (&cu
->header
, sect_off
))
14169 /* As DW_OP_GNU_parameter_ref uses CU-relative offset this
14170 binding can be done only inside one CU. Such referenced DIE
14171 therefore cannot be even moved to DW_TAG_partial_unit. */
14172 complaint (_("DW_AT_call_parameter offset is not in CU for "
14173 "DW_TAG_call_site child DIE %s [in module %s]"),
14174 sect_offset_str (child_die
->sect_off
),
14175 objfile_name (objfile
));
14178 parameter
->u
.param_cu_off
14179 = (cu_offset
) (sect_off
- cu
->header
.sect_off
);
14181 else if (loc
== NULL
|| origin
!= NULL
|| !attr_form_is_block (loc
))
14183 complaint (_("No DW_FORM_block* DW_AT_location for "
14184 "DW_TAG_call_site child DIE %s [in module %s]"),
14185 sect_offset_str (child_die
->sect_off
), objfile_name (objfile
));
14190 parameter
->u
.dwarf_reg
= dwarf_block_to_dwarf_reg
14191 (DW_BLOCK (loc
)->data
, &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
]);
14192 if (parameter
->u
.dwarf_reg
!= -1)
14193 parameter
->kind
= CALL_SITE_PARAMETER_DWARF_REG
;
14194 else if (dwarf_block_to_sp_offset (gdbarch
, DW_BLOCK (loc
)->data
,
14195 &DW_BLOCK (loc
)->data
[DW_BLOCK (loc
)->size
],
14196 ¶meter
->u
.fb_offset
))
14197 parameter
->kind
= CALL_SITE_PARAMETER_FB_OFFSET
;
14200 complaint (_("Only single DW_OP_reg or DW_OP_fbreg is supported "
14201 "for DW_FORM_block* DW_AT_location is supported for "
14202 "DW_TAG_call_site child DIE %s "
14204 sect_offset_str (child_die
->sect_off
),
14205 objfile_name (objfile
));
14210 attr
= dwarf2_attr (child_die
, DW_AT_call_value
, cu
);
14212 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_value
, cu
);
14213 if (!attr_form_is_block (attr
))
14215 complaint (_("No DW_FORM_block* DW_AT_call_value for "
14216 "DW_TAG_call_site child DIE %s [in module %s]"),
14217 sect_offset_str (child_die
->sect_off
),
14218 objfile_name (objfile
));
14221 parameter
->value
= DW_BLOCK (attr
)->data
;
14222 parameter
->value_size
= DW_BLOCK (attr
)->size
;
14224 /* Parameters are not pre-cleared by memset above. */
14225 parameter
->data_value
= NULL
;
14226 parameter
->data_value_size
= 0;
14227 call_site
->parameter_count
++;
14229 attr
= dwarf2_attr (child_die
, DW_AT_call_data_value
, cu
);
14231 attr
= dwarf2_attr (child_die
, DW_AT_GNU_call_site_data_value
, cu
);
14234 if (!attr_form_is_block (attr
))
14235 complaint (_("No DW_FORM_block* DW_AT_call_data_value for "
14236 "DW_TAG_call_site child DIE %s [in module %s]"),
14237 sect_offset_str (child_die
->sect_off
),
14238 objfile_name (objfile
));
14241 parameter
->data_value
= DW_BLOCK (attr
)->data
;
14242 parameter
->data_value_size
= DW_BLOCK (attr
)->size
;
14248 /* Helper function for read_variable. If DIE represents a virtual
14249 table, then return the type of the concrete object that is
14250 associated with the virtual table. Otherwise, return NULL. */
14252 static struct type
*
14253 rust_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
14255 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
14259 /* Find the type DIE. */
14260 struct die_info
*type_die
= NULL
;
14261 struct dwarf2_cu
*type_cu
= cu
;
14263 if (attr_form_is_ref (attr
))
14264 type_die
= follow_die_ref (die
, attr
, &type_cu
);
14265 if (type_die
== NULL
)
14268 if (dwarf2_attr (type_die
, DW_AT_containing_type
, type_cu
) == NULL
)
14270 return die_containing_type (type_die
, type_cu
);
14273 /* Read a variable (DW_TAG_variable) DIE and create a new symbol. */
14276 read_variable (struct die_info
*die
, struct dwarf2_cu
*cu
)
14278 struct rust_vtable_symbol
*storage
= NULL
;
14280 if (cu
->language
== language_rust
)
14282 struct type
*containing_type
= rust_containing_type (die
, cu
);
14284 if (containing_type
!= NULL
)
14286 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14288 storage
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
14289 struct rust_vtable_symbol
);
14290 initialize_objfile_symbol (storage
);
14291 storage
->concrete_type
= containing_type
;
14292 storage
->subclass
= SYMBOL_RUST_VTABLE
;
14296 struct symbol
*res
= new_symbol (die
, NULL
, cu
, storage
);
14297 struct attribute
*abstract_origin
14298 = dwarf2_attr (die
, DW_AT_abstract_origin
, cu
);
14299 struct attribute
*loc
= dwarf2_attr (die
, DW_AT_location
, cu
);
14300 if (res
== NULL
&& loc
&& abstract_origin
)
14302 /* We have a variable without a name, but with a location and an abstract
14303 origin. This may be a concrete instance of an abstract variable
14304 referenced from an DW_OP_GNU_variable_value, so save it to find it back
14306 struct dwarf2_cu
*origin_cu
= cu
;
14307 struct die_info
*origin_die
14308 = follow_die_ref (die
, abstract_origin
, &origin_cu
);
14309 dwarf2_per_objfile
*dpo
= cu
->per_cu
->dwarf2_per_objfile
;
14310 dpo
->abstract_to_concrete
[origin_die
].push_back (die
);
14314 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET
14315 reading .debug_rnglists.
14316 Callback's type should be:
14317 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14318 Return true if the attributes are present and valid, otherwise,
14321 template <typename Callback
>
14323 dwarf2_rnglists_process (unsigned offset
, struct dwarf2_cu
*cu
,
14324 Callback
&&callback
)
14326 struct dwarf2_per_objfile
*dwarf2_per_objfile
14327 = cu
->per_cu
->dwarf2_per_objfile
;
14328 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14329 bfd
*obfd
= objfile
->obfd
;
14330 /* Base address selection entry. */
14333 const gdb_byte
*buffer
;
14334 CORE_ADDR baseaddr
;
14335 bool overflow
= false;
14337 found_base
= cu
->base_known
;
14338 base
= cu
->base_address
;
14340 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->rnglists
);
14341 if (offset
>= dwarf2_per_objfile
->rnglists
.size
)
14343 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14347 buffer
= dwarf2_per_objfile
->rnglists
.buffer
+ offset
;
14349 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14353 /* Initialize it due to a false compiler warning. */
14354 CORE_ADDR range_beginning
= 0, range_end
= 0;
14355 const gdb_byte
*buf_end
= (dwarf2_per_objfile
->rnglists
.buffer
14356 + dwarf2_per_objfile
->rnglists
.size
);
14357 unsigned int bytes_read
;
14359 if (buffer
== buf_end
)
14364 const auto rlet
= static_cast<enum dwarf_range_list_entry
>(*buffer
++);
14367 case DW_RLE_end_of_list
:
14369 case DW_RLE_base_address
:
14370 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14375 base
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14377 buffer
+= bytes_read
;
14379 case DW_RLE_start_length
:
14380 if (buffer
+ cu
->header
.addr_size
> buf_end
)
14385 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14386 buffer
+= bytes_read
;
14387 range_end
= (range_beginning
14388 + read_unsigned_leb128 (obfd
, buffer
, &bytes_read
));
14389 buffer
+= bytes_read
;
14390 if (buffer
> buf_end
)
14396 case DW_RLE_offset_pair
:
14397 range_beginning
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14398 buffer
+= bytes_read
;
14399 if (buffer
> buf_end
)
14404 range_end
= read_unsigned_leb128 (obfd
, buffer
, &bytes_read
);
14405 buffer
+= bytes_read
;
14406 if (buffer
> buf_end
)
14412 case DW_RLE_start_end
:
14413 if (buffer
+ 2 * cu
->header
.addr_size
> buf_end
)
14418 range_beginning
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14419 buffer
+= bytes_read
;
14420 range_end
= read_address (obfd
, buffer
, cu
, &bytes_read
);
14421 buffer
+= bytes_read
;
14424 complaint (_("Invalid .debug_rnglists data (no base address)"));
14427 if (rlet
== DW_RLE_end_of_list
|| overflow
)
14429 if (rlet
== DW_RLE_base_address
)
14434 /* We have no valid base address for the ranges
14436 complaint (_("Invalid .debug_rnglists data (no base address)"));
14440 if (range_beginning
> range_end
)
14442 /* Inverted range entries are invalid. */
14443 complaint (_("Invalid .debug_rnglists data (inverted range)"));
14447 /* Empty range entries have no effect. */
14448 if (range_beginning
== range_end
)
14451 range_beginning
+= base
;
14454 /* A not-uncommon case of bad debug info.
14455 Don't pollute the addrmap with bad data. */
14456 if (range_beginning
+ baseaddr
== 0
14457 && !dwarf2_per_objfile
->has_section_at_zero
)
14459 complaint (_(".debug_rnglists entry has start address of zero"
14460 " [in module %s]"), objfile_name (objfile
));
14464 callback (range_beginning
, range_end
);
14469 complaint (_("Offset %d is not terminated "
14470 "for DW_AT_ranges attribute"),
14478 /* Call CALLBACK from DW_AT_ranges attribute value OFFSET reading .debug_ranges.
14479 Callback's type should be:
14480 void (CORE_ADDR range_beginning, CORE_ADDR range_end)
14481 Return 1 if the attributes are present and valid, otherwise, return 0. */
14483 template <typename Callback
>
14485 dwarf2_ranges_process (unsigned offset
, struct dwarf2_cu
*cu
,
14486 Callback
&&callback
)
14488 struct dwarf2_per_objfile
*dwarf2_per_objfile
14489 = cu
->per_cu
->dwarf2_per_objfile
;
14490 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
14491 struct comp_unit_head
*cu_header
= &cu
->header
;
14492 bfd
*obfd
= objfile
->obfd
;
14493 unsigned int addr_size
= cu_header
->addr_size
;
14494 CORE_ADDR mask
= ~(~(CORE_ADDR
)1 << (addr_size
* 8 - 1));
14495 /* Base address selection entry. */
14498 unsigned int dummy
;
14499 const gdb_byte
*buffer
;
14500 CORE_ADDR baseaddr
;
14502 if (cu_header
->version
>= 5)
14503 return dwarf2_rnglists_process (offset
, cu
, callback
);
14505 found_base
= cu
->base_known
;
14506 base
= cu
->base_address
;
14508 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->ranges
);
14509 if (offset
>= dwarf2_per_objfile
->ranges
.size
)
14511 complaint (_("Offset %d out of bounds for DW_AT_ranges attribute"),
14515 buffer
= dwarf2_per_objfile
->ranges
.buffer
+ offset
;
14517 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
14521 CORE_ADDR range_beginning
, range_end
;
14523 range_beginning
= read_address (obfd
, buffer
, cu
, &dummy
);
14524 buffer
+= addr_size
;
14525 range_end
= read_address (obfd
, buffer
, cu
, &dummy
);
14526 buffer
+= addr_size
;
14527 offset
+= 2 * addr_size
;
14529 /* An end of list marker is a pair of zero addresses. */
14530 if (range_beginning
== 0 && range_end
== 0)
14531 /* Found the end of list entry. */
14534 /* Each base address selection entry is a pair of 2 values.
14535 The first is the largest possible address, the second is
14536 the base address. Check for a base address here. */
14537 if ((range_beginning
& mask
) == mask
)
14539 /* If we found the largest possible address, then we already
14540 have the base address in range_end. */
14548 /* We have no valid base address for the ranges
14550 complaint (_("Invalid .debug_ranges data (no base address)"));
14554 if (range_beginning
> range_end
)
14556 /* Inverted range entries are invalid. */
14557 complaint (_("Invalid .debug_ranges data (inverted range)"));
14561 /* Empty range entries have no effect. */
14562 if (range_beginning
== range_end
)
14565 range_beginning
+= base
;
14568 /* A not-uncommon case of bad debug info.
14569 Don't pollute the addrmap with bad data. */
14570 if (range_beginning
+ baseaddr
== 0
14571 && !dwarf2_per_objfile
->has_section_at_zero
)
14573 complaint (_(".debug_ranges entry has start address of zero"
14574 " [in module %s]"), objfile_name (objfile
));
14578 callback (range_beginning
, range_end
);
14584 /* Get low and high pc attributes from DW_AT_ranges attribute value OFFSET.
14585 Return 1 if the attributes are present and valid, otherwise, return 0.
14586 If RANGES_PST is not NULL we should setup `objfile->psymtabs_addrmap'. */
14589 dwarf2_ranges_read (unsigned offset
, CORE_ADDR
*low_return
,
14590 CORE_ADDR
*high_return
, struct dwarf2_cu
*cu
,
14591 struct partial_symtab
*ranges_pst
)
14593 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14594 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14595 const CORE_ADDR baseaddr
= ANOFFSET (objfile
->section_offsets
,
14596 SECT_OFF_TEXT (objfile
));
14599 CORE_ADDR high
= 0;
14602 retval
= dwarf2_ranges_process (offset
, cu
,
14603 [&] (CORE_ADDR range_beginning
, CORE_ADDR range_end
)
14605 if (ranges_pst
!= NULL
)
14610 lowpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14611 range_beginning
+ baseaddr
)
14613 highpc
= (gdbarch_adjust_dwarf2_addr (gdbarch
,
14614 range_end
+ baseaddr
)
14616 addrmap_set_empty (objfile
->partial_symtabs
->psymtabs_addrmap
,
14617 lowpc
, highpc
- 1, ranges_pst
);
14620 /* FIXME: This is recording everything as a low-high
14621 segment of consecutive addresses. We should have a
14622 data structure for discontiguous block ranges
14626 low
= range_beginning
;
14632 if (range_beginning
< low
)
14633 low
= range_beginning
;
14634 if (range_end
> high
)
14642 /* If the first entry is an end-of-list marker, the range
14643 describes an empty scope, i.e. no instructions. */
14649 *high_return
= high
;
14653 /* Get low and high pc attributes from a die. See enum pc_bounds_kind
14654 definition for the return value. *LOWPC and *HIGHPC are set iff
14655 neither PC_BOUNDS_NOT_PRESENT nor PC_BOUNDS_INVALID are returned. */
14657 static enum pc_bounds_kind
14658 dwarf2_get_pc_bounds (struct die_info
*die
, CORE_ADDR
*lowpc
,
14659 CORE_ADDR
*highpc
, struct dwarf2_cu
*cu
,
14660 struct partial_symtab
*pst
)
14662 struct dwarf2_per_objfile
*dwarf2_per_objfile
14663 = cu
->per_cu
->dwarf2_per_objfile
;
14664 struct attribute
*attr
;
14665 struct attribute
*attr_high
;
14667 CORE_ADDR high
= 0;
14668 enum pc_bounds_kind ret
;
14670 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14673 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14676 low
= attr_value_as_address (attr
);
14677 high
= attr_value_as_address (attr_high
);
14678 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14682 /* Found high w/o low attribute. */
14683 return PC_BOUNDS_INVALID
;
14685 /* Found consecutive range of addresses. */
14686 ret
= PC_BOUNDS_HIGH_LOW
;
14690 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14693 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14694 We take advantage of the fact that DW_AT_ranges does not appear
14695 in DW_TAG_compile_unit of DWO files. */
14696 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14697 unsigned int ranges_offset
= (DW_UNSND (attr
)
14698 + (need_ranges_base
14702 /* Value of the DW_AT_ranges attribute is the offset in the
14703 .debug_ranges section. */
14704 if (!dwarf2_ranges_read (ranges_offset
, &low
, &high
, cu
, pst
))
14705 return PC_BOUNDS_INVALID
;
14706 /* Found discontinuous range of addresses. */
14707 ret
= PC_BOUNDS_RANGES
;
14710 return PC_BOUNDS_NOT_PRESENT
;
14713 /* partial_die_info::read has also the strict LOW < HIGH requirement. */
14715 return PC_BOUNDS_INVALID
;
14717 /* When using the GNU linker, .gnu.linkonce. sections are used to
14718 eliminate duplicate copies of functions and vtables and such.
14719 The linker will arbitrarily choose one and discard the others.
14720 The AT_*_pc values for such functions refer to local labels in
14721 these sections. If the section from that file was discarded, the
14722 labels are not in the output, so the relocs get a value of 0.
14723 If this is a discarded function, mark the pc bounds as invalid,
14724 so that GDB will ignore it. */
14725 if (low
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
14726 return PC_BOUNDS_INVALID
;
14734 /* Assuming that DIE represents a subprogram DIE or a lexical block, get
14735 its low and high PC addresses. Do nothing if these addresses could not
14736 be determined. Otherwise, set LOWPC to the low address if it is smaller,
14737 and HIGHPC to the high address if greater than HIGHPC. */
14740 dwarf2_get_subprogram_pc_bounds (struct die_info
*die
,
14741 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14742 struct dwarf2_cu
*cu
)
14744 CORE_ADDR low
, high
;
14745 struct die_info
*child
= die
->child
;
14747 if (dwarf2_get_pc_bounds (die
, &low
, &high
, cu
, NULL
) >= PC_BOUNDS_RANGES
)
14749 *lowpc
= std::min (*lowpc
, low
);
14750 *highpc
= std::max (*highpc
, high
);
14753 /* If the language does not allow nested subprograms (either inside
14754 subprograms or lexical blocks), we're done. */
14755 if (cu
->language
!= language_ada
)
14758 /* Check all the children of the given DIE. If it contains nested
14759 subprograms, then check their pc bounds. Likewise, we need to
14760 check lexical blocks as well, as they may also contain subprogram
14762 while (child
&& child
->tag
)
14764 if (child
->tag
== DW_TAG_subprogram
14765 || child
->tag
== DW_TAG_lexical_block
)
14766 dwarf2_get_subprogram_pc_bounds (child
, lowpc
, highpc
, cu
);
14767 child
= sibling_die (child
);
14771 /* Get the low and high pc's represented by the scope DIE, and store
14772 them in *LOWPC and *HIGHPC. If the correct values can't be
14773 determined, set *LOWPC to -1 and *HIGHPC to 0. */
14776 get_scope_pc_bounds (struct die_info
*die
,
14777 CORE_ADDR
*lowpc
, CORE_ADDR
*highpc
,
14778 struct dwarf2_cu
*cu
)
14780 CORE_ADDR best_low
= (CORE_ADDR
) -1;
14781 CORE_ADDR best_high
= (CORE_ADDR
) 0;
14782 CORE_ADDR current_low
, current_high
;
14784 if (dwarf2_get_pc_bounds (die
, ¤t_low
, ¤t_high
, cu
, NULL
)
14785 >= PC_BOUNDS_RANGES
)
14787 best_low
= current_low
;
14788 best_high
= current_high
;
14792 struct die_info
*child
= die
->child
;
14794 while (child
&& child
->tag
)
14796 switch (child
->tag
) {
14797 case DW_TAG_subprogram
:
14798 dwarf2_get_subprogram_pc_bounds (child
, &best_low
, &best_high
, cu
);
14800 case DW_TAG_namespace
:
14801 case DW_TAG_module
:
14802 /* FIXME: carlton/2004-01-16: Should we do this for
14803 DW_TAG_class_type/DW_TAG_structure_type, too? I think
14804 that current GCC's always emit the DIEs corresponding
14805 to definitions of methods of classes as children of a
14806 DW_TAG_compile_unit or DW_TAG_namespace (as opposed to
14807 the DIEs giving the declarations, which could be
14808 anywhere). But I don't see any reason why the
14809 standards says that they have to be there. */
14810 get_scope_pc_bounds (child
, ¤t_low
, ¤t_high
, cu
);
14812 if (current_low
!= ((CORE_ADDR
) -1))
14814 best_low
= std::min (best_low
, current_low
);
14815 best_high
= std::max (best_high
, current_high
);
14823 child
= sibling_die (child
);
14828 *highpc
= best_high
;
14831 /* Record the address ranges for BLOCK, offset by BASEADDR, as given
14835 dwarf2_record_block_ranges (struct die_info
*die
, struct block
*block
,
14836 CORE_ADDR baseaddr
, struct dwarf2_cu
*cu
)
14838 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
14839 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
14840 struct attribute
*attr
;
14841 struct attribute
*attr_high
;
14843 attr_high
= dwarf2_attr (die
, DW_AT_high_pc
, cu
);
14846 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
14849 CORE_ADDR low
= attr_value_as_address (attr
);
14850 CORE_ADDR high
= attr_value_as_address (attr_high
);
14852 if (cu
->header
.version
>= 4 && attr_form_is_constant (attr_high
))
14855 low
= gdbarch_adjust_dwarf2_addr (gdbarch
, low
+ baseaddr
);
14856 high
= gdbarch_adjust_dwarf2_addr (gdbarch
, high
+ baseaddr
);
14857 cu
->get_builder ()->record_block_range (block
, low
, high
- 1);
14861 attr
= dwarf2_attr (die
, DW_AT_ranges
, cu
);
14864 /* DW_AT_ranges_base does not apply to DIEs from the DWO skeleton.
14865 We take advantage of the fact that DW_AT_ranges does not appear
14866 in DW_TAG_compile_unit of DWO files. */
14867 int need_ranges_base
= die
->tag
!= DW_TAG_compile_unit
;
14869 /* The value of the DW_AT_ranges attribute is the offset of the
14870 address range list in the .debug_ranges section. */
14871 unsigned long offset
= (DW_UNSND (attr
)
14872 + (need_ranges_base
? cu
->ranges_base
: 0));
14874 std::vector
<blockrange
> blockvec
;
14875 dwarf2_ranges_process (offset
, cu
,
14876 [&] (CORE_ADDR start
, CORE_ADDR end
)
14880 start
= gdbarch_adjust_dwarf2_addr (gdbarch
, start
);
14881 end
= gdbarch_adjust_dwarf2_addr (gdbarch
, end
);
14882 cu
->get_builder ()->record_block_range (block
, start
, end
- 1);
14883 blockvec
.emplace_back (start
, end
);
14886 BLOCK_RANGES(block
) = make_blockranges (objfile
, blockvec
);
14890 /* Check whether the producer field indicates either of GCC < 4.6, or the
14891 Intel C/C++ compiler, and cache the result in CU. */
14894 check_producer (struct dwarf2_cu
*cu
)
14898 if (cu
->producer
== NULL
)
14900 /* For unknown compilers expect their behavior is DWARF version
14903 GCC started to support .debug_types sections by -gdwarf-4 since
14904 gcc-4.5.x. As the .debug_types sections are missing DW_AT_producer
14905 for their space efficiency GDB cannot workaround gcc-4.5.x -gdwarf-4
14906 combination. gcc-4.5.x -gdwarf-4 binaries have DW_AT_accessibility
14907 interpreted incorrectly by GDB now - GCC PR debug/48229. */
14909 else if (producer_is_gcc (cu
->producer
, &major
, &minor
))
14911 cu
->producer_is_gxx_lt_4_6
= major
< 4 || (major
== 4 && minor
< 6);
14912 cu
->producer_is_gcc_lt_4_3
= major
< 4 || (major
== 4 && minor
< 3);
14914 else if (producer_is_icc (cu
->producer
, &major
, &minor
))
14916 cu
->producer_is_icc
= true;
14917 cu
->producer_is_icc_lt_14
= major
< 14;
14919 else if (startswith (cu
->producer
, "CodeWarrior S12/L-ISA"))
14920 cu
->producer_is_codewarrior
= true;
14923 /* For other non-GCC compilers, expect their behavior is DWARF version
14927 cu
->checked_producer
= true;
14930 /* Check for GCC PR debug/45124 fix which is not present in any G++ version up
14931 to 4.5.any while it is present already in G++ 4.6.0 - the PR has been fixed
14932 during 4.6.0 experimental. */
14935 producer_is_gxx_lt_4_6 (struct dwarf2_cu
*cu
)
14937 if (!cu
->checked_producer
)
14938 check_producer (cu
);
14940 return cu
->producer_is_gxx_lt_4_6
;
14944 /* Codewarrior (at least as of version 5.0.40) generates dwarf line information
14945 with incorrect is_stmt attributes. */
14948 producer_is_codewarrior (struct dwarf2_cu
*cu
)
14950 if (!cu
->checked_producer
)
14951 check_producer (cu
);
14953 return cu
->producer_is_codewarrior
;
14956 /* Return the default accessibility type if it is not overriden by
14957 DW_AT_accessibility. */
14959 static enum dwarf_access_attribute
14960 dwarf2_default_access_attribute (struct die_info
*die
, struct dwarf2_cu
*cu
)
14962 if (cu
->header
.version
< 3 || producer_is_gxx_lt_4_6 (cu
))
14964 /* The default DWARF 2 accessibility for members is public, the default
14965 accessibility for inheritance is private. */
14967 if (die
->tag
!= DW_TAG_inheritance
)
14968 return DW_ACCESS_public
;
14970 return DW_ACCESS_private
;
14974 /* DWARF 3+ defines the default accessibility a different way. The same
14975 rules apply now for DW_TAG_inheritance as for the members and it only
14976 depends on the container kind. */
14978 if (die
->parent
->tag
== DW_TAG_class_type
)
14979 return DW_ACCESS_private
;
14981 return DW_ACCESS_public
;
14985 /* Look for DW_AT_data_member_location. Set *OFFSET to the byte
14986 offset. If the attribute was not found return 0, otherwise return
14987 1. If it was found but could not properly be handled, set *OFFSET
14991 handle_data_member_location (struct die_info
*die
, struct dwarf2_cu
*cu
,
14994 struct attribute
*attr
;
14996 attr
= dwarf2_attr (die
, DW_AT_data_member_location
, cu
);
15001 /* Note that we do not check for a section offset first here.
15002 This is because DW_AT_data_member_location is new in DWARF 4,
15003 so if we see it, we can assume that a constant form is really
15004 a constant and not a section offset. */
15005 if (attr_form_is_constant (attr
))
15006 *offset
= dwarf2_get_attr_constant_value (attr
, 0);
15007 else if (attr_form_is_section_offset (attr
))
15008 dwarf2_complex_location_expr_complaint ();
15009 else if (attr_form_is_block (attr
))
15010 *offset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15012 dwarf2_complex_location_expr_complaint ();
15020 /* Add an aggregate field to the field list. */
15023 dwarf2_add_field (struct field_info
*fip
, struct die_info
*die
,
15024 struct dwarf2_cu
*cu
)
15026 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15027 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
15028 struct nextfield
*new_field
;
15029 struct attribute
*attr
;
15031 const char *fieldname
= "";
15033 if (die
->tag
== DW_TAG_inheritance
)
15035 fip
->baseclasses
.emplace_back ();
15036 new_field
= &fip
->baseclasses
.back ();
15040 fip
->fields
.emplace_back ();
15041 new_field
= &fip
->fields
.back ();
15046 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15048 new_field
->accessibility
= DW_UNSND (attr
);
15050 new_field
->accessibility
= dwarf2_default_access_attribute (die
, cu
);
15051 if (new_field
->accessibility
!= DW_ACCESS_public
)
15052 fip
->non_public_fields
= 1;
15054 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15056 new_field
->virtuality
= DW_UNSND (attr
);
15058 new_field
->virtuality
= DW_VIRTUALITY_none
;
15060 fp
= &new_field
->field
;
15062 if (die
->tag
== DW_TAG_member
&& ! die_is_declaration (die
, cu
))
15066 /* Data member other than a C++ static data member. */
15068 /* Get type of field. */
15069 fp
->type
= die_type (die
, cu
);
15071 SET_FIELD_BITPOS (*fp
, 0);
15073 /* Get bit size of field (zero if none). */
15074 attr
= dwarf2_attr (die
, DW_AT_bit_size
, cu
);
15077 FIELD_BITSIZE (*fp
) = DW_UNSND (attr
);
15081 FIELD_BITSIZE (*fp
) = 0;
15084 /* Get bit offset of field. */
15085 if (handle_data_member_location (die
, cu
, &offset
))
15086 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15087 attr
= dwarf2_attr (die
, DW_AT_bit_offset
, cu
);
15090 if (gdbarch_bits_big_endian (gdbarch
))
15092 /* For big endian bits, the DW_AT_bit_offset gives the
15093 additional bit offset from the MSB of the containing
15094 anonymous object to the MSB of the field. We don't
15095 have to do anything special since we don't need to
15096 know the size of the anonymous object. */
15097 SET_FIELD_BITPOS (*fp
, FIELD_BITPOS (*fp
) + DW_UNSND (attr
));
15101 /* For little endian bits, compute the bit offset to the
15102 MSB of the anonymous object, subtract off the number of
15103 bits from the MSB of the field to the MSB of the
15104 object, and then subtract off the number of bits of
15105 the field itself. The result is the bit offset of
15106 the LSB of the field. */
15107 int anonymous_size
;
15108 int bit_offset
= DW_UNSND (attr
);
15110 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15113 /* The size of the anonymous object containing
15114 the bit field is explicit, so use the
15115 indicated size (in bytes). */
15116 anonymous_size
= DW_UNSND (attr
);
15120 /* The size of the anonymous object containing
15121 the bit field must be inferred from the type
15122 attribute of the data member containing the
15124 anonymous_size
= TYPE_LENGTH (fp
->type
);
15126 SET_FIELD_BITPOS (*fp
,
15127 (FIELD_BITPOS (*fp
)
15128 + anonymous_size
* bits_per_byte
15129 - bit_offset
- FIELD_BITSIZE (*fp
)));
15132 attr
= dwarf2_attr (die
, DW_AT_data_bit_offset
, cu
);
15134 SET_FIELD_BITPOS (*fp
, (FIELD_BITPOS (*fp
)
15135 + dwarf2_get_attr_constant_value (attr
, 0)));
15137 /* Get name of field. */
15138 fieldname
= dwarf2_name (die
, cu
);
15139 if (fieldname
== NULL
)
15142 /* The name is already allocated along with this objfile, so we don't
15143 need to duplicate it for the type. */
15144 fp
->name
= fieldname
;
15146 /* Change accessibility for artificial fields (e.g. virtual table
15147 pointer or virtual base class pointer) to private. */
15148 if (dwarf2_attr (die
, DW_AT_artificial
, cu
))
15150 FIELD_ARTIFICIAL (*fp
) = 1;
15151 new_field
->accessibility
= DW_ACCESS_private
;
15152 fip
->non_public_fields
= 1;
15155 else if (die
->tag
== DW_TAG_member
|| die
->tag
== DW_TAG_variable
)
15157 /* C++ static member. */
15159 /* NOTE: carlton/2002-11-05: It should be a DW_TAG_member that
15160 is a declaration, but all versions of G++ as of this writing
15161 (so through at least 3.2.1) incorrectly generate
15162 DW_TAG_variable tags. */
15164 const char *physname
;
15166 /* Get name of field. */
15167 fieldname
= dwarf2_name (die
, cu
);
15168 if (fieldname
== NULL
)
15171 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
15173 /* Only create a symbol if this is an external value.
15174 new_symbol checks this and puts the value in the global symbol
15175 table, which we want. If it is not external, new_symbol
15176 will try to put the value in cu->list_in_scope which is wrong. */
15177 && dwarf2_flag_true_p (die
, DW_AT_external
, cu
))
15179 /* A static const member, not much different than an enum as far as
15180 we're concerned, except that we can support more types. */
15181 new_symbol (die
, NULL
, cu
);
15184 /* Get physical name. */
15185 physname
= dwarf2_physname (fieldname
, die
, cu
);
15187 /* The name is already allocated along with this objfile, so we don't
15188 need to duplicate it for the type. */
15189 SET_FIELD_PHYSNAME (*fp
, physname
? physname
: "");
15190 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15191 FIELD_NAME (*fp
) = fieldname
;
15193 else if (die
->tag
== DW_TAG_inheritance
)
15197 /* C++ base class field. */
15198 if (handle_data_member_location (die
, cu
, &offset
))
15199 SET_FIELD_BITPOS (*fp
, offset
* bits_per_byte
);
15200 FIELD_BITSIZE (*fp
) = 0;
15201 FIELD_TYPE (*fp
) = die_type (die
, cu
);
15202 FIELD_NAME (*fp
) = TYPE_NAME (fp
->type
);
15204 else if (die
->tag
== DW_TAG_variant_part
)
15206 /* process_structure_scope will treat this DIE as a union. */
15207 process_structure_scope (die
, cu
);
15209 /* The variant part is relative to the start of the enclosing
15211 SET_FIELD_BITPOS (*fp
, 0);
15212 fp
->type
= get_die_type (die
, cu
);
15213 fp
->artificial
= 1;
15214 fp
->name
= "<<variant>>";
15216 /* Normally a DW_TAG_variant_part won't have a size, but our
15217 representation requires one, so set it to the maximum of the
15219 if (TYPE_LENGTH (fp
->type
) == 0)
15222 for (int i
= 0; i
< TYPE_NFIELDS (fp
->type
); ++i
)
15223 if (TYPE_LENGTH (TYPE_FIELD_TYPE (fp
->type
, i
)) > max
)
15224 max
= TYPE_LENGTH (TYPE_FIELD_TYPE (fp
->type
, i
));
15225 TYPE_LENGTH (fp
->type
) = max
;
15229 gdb_assert_not_reached ("missing case in dwarf2_add_field");
15232 /* Can the type given by DIE define another type? */
15235 type_can_define_types (const struct die_info
*die
)
15239 case DW_TAG_typedef
:
15240 case DW_TAG_class_type
:
15241 case DW_TAG_structure_type
:
15242 case DW_TAG_union_type
:
15243 case DW_TAG_enumeration_type
:
15251 /* Add a type definition defined in the scope of the FIP's class. */
15254 dwarf2_add_type_defn (struct field_info
*fip
, struct die_info
*die
,
15255 struct dwarf2_cu
*cu
)
15257 struct decl_field fp
;
15258 memset (&fp
, 0, sizeof (fp
));
15260 gdb_assert (type_can_define_types (die
));
15262 /* Get name of field. NULL is okay here, meaning an anonymous type. */
15263 fp
.name
= dwarf2_name (die
, cu
);
15264 fp
.type
= read_type_die (die
, cu
);
15266 /* Save accessibility. */
15267 enum dwarf_access_attribute accessibility
;
15268 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15270 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15272 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15273 switch (accessibility
)
15275 case DW_ACCESS_public
:
15276 /* The assumed value if neither private nor protected. */
15278 case DW_ACCESS_private
:
15281 case DW_ACCESS_protected
:
15282 fp
.is_protected
= 1;
15285 complaint (_("Unhandled DW_AT_accessibility value (%x)"), accessibility
);
15288 if (die
->tag
== DW_TAG_typedef
)
15289 fip
->typedef_field_list
.push_back (fp
);
15291 fip
->nested_types_list
.push_back (fp
);
15294 /* Create the vector of fields, and attach it to the type. */
15297 dwarf2_attach_fields_to_type (struct field_info
*fip
, struct type
*type
,
15298 struct dwarf2_cu
*cu
)
15300 int nfields
= fip
->nfields
;
15302 /* Record the field count, allocate space for the array of fields,
15303 and create blank accessibility bitfields if necessary. */
15304 TYPE_NFIELDS (type
) = nfields
;
15305 TYPE_FIELDS (type
) = (struct field
*)
15306 TYPE_ZALLOC (type
, sizeof (struct field
) * nfields
);
15308 if (fip
->non_public_fields
&& cu
->language
!= language_ada
)
15310 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15312 TYPE_FIELD_PRIVATE_BITS (type
) =
15313 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15314 B_CLRALL (TYPE_FIELD_PRIVATE_BITS (type
), nfields
);
15316 TYPE_FIELD_PROTECTED_BITS (type
) =
15317 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15318 B_CLRALL (TYPE_FIELD_PROTECTED_BITS (type
), nfields
);
15320 TYPE_FIELD_IGNORE_BITS (type
) =
15321 (B_TYPE
*) TYPE_ALLOC (type
, B_BYTES (nfields
));
15322 B_CLRALL (TYPE_FIELD_IGNORE_BITS (type
), nfields
);
15325 /* If the type has baseclasses, allocate and clear a bit vector for
15326 TYPE_FIELD_VIRTUAL_BITS. */
15327 if (!fip
->baseclasses
.empty () && cu
->language
!= language_ada
)
15329 int num_bytes
= B_BYTES (fip
->baseclasses
.size ());
15330 unsigned char *pointer
;
15332 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15333 pointer
= (unsigned char *) TYPE_ALLOC (type
, num_bytes
);
15334 TYPE_FIELD_VIRTUAL_BITS (type
) = pointer
;
15335 B_CLRALL (TYPE_FIELD_VIRTUAL_BITS (type
), fip
->baseclasses
.size ());
15336 TYPE_N_BASECLASSES (type
) = fip
->baseclasses
.size ();
15339 if (TYPE_FLAG_DISCRIMINATED_UNION (type
))
15341 struct discriminant_info
*di
= alloc_discriminant_info (type
, -1, -1);
15343 for (int index
= 0; index
< nfields
; ++index
)
15345 struct nextfield
&field
= fip
->fields
[index
];
15347 if (field
.variant
.is_discriminant
)
15348 di
->discriminant_index
= index
;
15349 else if (field
.variant
.default_branch
)
15350 di
->default_index
= index
;
15352 di
->discriminants
[index
] = field
.variant
.discriminant_value
;
15356 /* Copy the saved-up fields into the field vector. */
15357 for (int i
= 0; i
< nfields
; ++i
)
15359 struct nextfield
&field
15360 = ((i
< fip
->baseclasses
.size ()) ? fip
->baseclasses
[i
]
15361 : fip
->fields
[i
- fip
->baseclasses
.size ()]);
15363 TYPE_FIELD (type
, i
) = field
.field
;
15364 switch (field
.accessibility
)
15366 case DW_ACCESS_private
:
15367 if (cu
->language
!= language_ada
)
15368 SET_TYPE_FIELD_PRIVATE (type
, i
);
15371 case DW_ACCESS_protected
:
15372 if (cu
->language
!= language_ada
)
15373 SET_TYPE_FIELD_PROTECTED (type
, i
);
15376 case DW_ACCESS_public
:
15380 /* Unknown accessibility. Complain and treat it as public. */
15382 complaint (_("unsupported accessibility %d"),
15383 field
.accessibility
);
15387 if (i
< fip
->baseclasses
.size ())
15389 switch (field
.virtuality
)
15391 case DW_VIRTUALITY_virtual
:
15392 case DW_VIRTUALITY_pure_virtual
:
15393 if (cu
->language
== language_ada
)
15394 error (_("unexpected virtuality in component of Ada type"));
15395 SET_TYPE_FIELD_VIRTUAL (type
, i
);
15402 /* Return true if this member function is a constructor, false
15406 dwarf2_is_constructor (struct die_info
*die
, struct dwarf2_cu
*cu
)
15408 const char *fieldname
;
15409 const char *type_name
;
15412 if (die
->parent
== NULL
)
15415 if (die
->parent
->tag
!= DW_TAG_structure_type
15416 && die
->parent
->tag
!= DW_TAG_union_type
15417 && die
->parent
->tag
!= DW_TAG_class_type
)
15420 fieldname
= dwarf2_name (die
, cu
);
15421 type_name
= dwarf2_name (die
->parent
, cu
);
15422 if (fieldname
== NULL
|| type_name
== NULL
)
15425 len
= strlen (fieldname
);
15426 return (strncmp (fieldname
, type_name
, len
) == 0
15427 && (type_name
[len
] == '\0' || type_name
[len
] == '<'));
15430 /* Add a member function to the proper fieldlist. */
15433 dwarf2_add_member_fn (struct field_info
*fip
, struct die_info
*die
,
15434 struct type
*type
, struct dwarf2_cu
*cu
)
15436 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15437 struct attribute
*attr
;
15439 struct fnfieldlist
*flp
= nullptr;
15440 struct fn_field
*fnp
;
15441 const char *fieldname
;
15442 struct type
*this_type
;
15443 enum dwarf_access_attribute accessibility
;
15445 if (cu
->language
== language_ada
)
15446 error (_("unexpected member function in Ada type"));
15448 /* Get name of member function. */
15449 fieldname
= dwarf2_name (die
, cu
);
15450 if (fieldname
== NULL
)
15453 /* Look up member function name in fieldlist. */
15454 for (i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15456 if (strcmp (fip
->fnfieldlists
[i
].name
, fieldname
) == 0)
15458 flp
= &fip
->fnfieldlists
[i
];
15463 /* Create a new fnfieldlist if necessary. */
15464 if (flp
== nullptr)
15466 fip
->fnfieldlists
.emplace_back ();
15467 flp
= &fip
->fnfieldlists
.back ();
15468 flp
->name
= fieldname
;
15469 i
= fip
->fnfieldlists
.size () - 1;
15472 /* Create a new member function field and add it to the vector of
15474 flp
->fnfields
.emplace_back ();
15475 fnp
= &flp
->fnfields
.back ();
15477 /* Delay processing of the physname until later. */
15478 if (cu
->language
== language_cplus
)
15479 add_to_method_list (type
, i
, flp
->fnfields
.size () - 1, fieldname
,
15483 const char *physname
= dwarf2_physname (fieldname
, die
, cu
);
15484 fnp
->physname
= physname
? physname
: "";
15487 fnp
->type
= alloc_type (objfile
);
15488 this_type
= read_type_die (die
, cu
);
15489 if (this_type
&& TYPE_CODE (this_type
) == TYPE_CODE_FUNC
)
15491 int nparams
= TYPE_NFIELDS (this_type
);
15493 /* TYPE is the domain of this method, and THIS_TYPE is the type
15494 of the method itself (TYPE_CODE_METHOD). */
15495 smash_to_method_type (fnp
->type
, type
,
15496 TYPE_TARGET_TYPE (this_type
),
15497 TYPE_FIELDS (this_type
),
15498 TYPE_NFIELDS (this_type
),
15499 TYPE_VARARGS (this_type
));
15501 /* Handle static member functions.
15502 Dwarf2 has no clean way to discern C++ static and non-static
15503 member functions. G++ helps GDB by marking the first
15504 parameter for non-static member functions (which is the this
15505 pointer) as artificial. We obtain this information from
15506 read_subroutine_type via TYPE_FIELD_ARTIFICIAL. */
15507 if (nparams
== 0 || TYPE_FIELD_ARTIFICIAL (this_type
, 0) == 0)
15508 fnp
->voffset
= VOFFSET_STATIC
;
15511 complaint (_("member function type missing for '%s'"),
15512 dwarf2_full_name (fieldname
, die
, cu
));
15514 /* Get fcontext from DW_AT_containing_type if present. */
15515 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
15516 fnp
->fcontext
= die_containing_type (die
, cu
);
15518 /* dwarf2 doesn't have stubbed physical names, so the setting of is_const and
15519 is_volatile is irrelevant, as it is needed by gdb_mangle_name only. */
15521 /* Get accessibility. */
15522 attr
= dwarf2_attr (die
, DW_AT_accessibility
, cu
);
15524 accessibility
= (enum dwarf_access_attribute
) DW_UNSND (attr
);
15526 accessibility
= dwarf2_default_access_attribute (die
, cu
);
15527 switch (accessibility
)
15529 case DW_ACCESS_private
:
15530 fnp
->is_private
= 1;
15532 case DW_ACCESS_protected
:
15533 fnp
->is_protected
= 1;
15537 /* Check for artificial methods. */
15538 attr
= dwarf2_attr (die
, DW_AT_artificial
, cu
);
15539 if (attr
&& DW_UNSND (attr
) != 0)
15540 fnp
->is_artificial
= 1;
15542 fnp
->is_constructor
= dwarf2_is_constructor (die
, cu
);
15544 /* Get index in virtual function table if it is a virtual member
15545 function. For older versions of GCC, this is an offset in the
15546 appropriate virtual table, as specified by DW_AT_containing_type.
15547 For everyone else, it is an expression to be evaluated relative
15548 to the object address. */
15550 attr
= dwarf2_attr (die
, DW_AT_vtable_elem_location
, cu
);
15553 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
> 0)
15555 if (DW_BLOCK (attr
)->data
[0] == DW_OP_constu
)
15557 /* Old-style GCC. */
15558 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
) + 2;
15560 else if (DW_BLOCK (attr
)->data
[0] == DW_OP_deref
15561 || (DW_BLOCK (attr
)->size
> 1
15562 && DW_BLOCK (attr
)->data
[0] == DW_OP_deref_size
15563 && DW_BLOCK (attr
)->data
[1] == cu
->header
.addr_size
))
15565 fnp
->voffset
= decode_locdesc (DW_BLOCK (attr
), cu
);
15566 if ((fnp
->voffset
% cu
->header
.addr_size
) != 0)
15567 dwarf2_complex_location_expr_complaint ();
15569 fnp
->voffset
/= cu
->header
.addr_size
;
15573 dwarf2_complex_location_expr_complaint ();
15575 if (!fnp
->fcontext
)
15577 /* If there is no `this' field and no DW_AT_containing_type,
15578 we cannot actually find a base class context for the
15580 if (TYPE_NFIELDS (this_type
) == 0
15581 || !TYPE_FIELD_ARTIFICIAL (this_type
, 0))
15583 complaint (_("cannot determine context for virtual member "
15584 "function \"%s\" (offset %s)"),
15585 fieldname
, sect_offset_str (die
->sect_off
));
15590 = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (this_type
, 0));
15594 else if (attr_form_is_section_offset (attr
))
15596 dwarf2_complex_location_expr_complaint ();
15600 dwarf2_invalid_attrib_class_complaint ("DW_AT_vtable_elem_location",
15606 attr
= dwarf2_attr (die
, DW_AT_virtuality
, cu
);
15607 if (attr
&& DW_UNSND (attr
))
15609 /* GCC does this, as of 2008-08-25; PR debug/37237. */
15610 complaint (_("Member function \"%s\" (offset %s) is virtual "
15611 "but the vtable offset is not specified"),
15612 fieldname
, sect_offset_str (die
->sect_off
));
15613 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15614 TYPE_CPLUS_DYNAMIC (type
) = 1;
15619 /* Create the vector of member function fields, and attach it to the type. */
15622 dwarf2_attach_fn_fields_to_type (struct field_info
*fip
, struct type
*type
,
15623 struct dwarf2_cu
*cu
)
15625 if (cu
->language
== language_ada
)
15626 error (_("unexpected member functions in Ada type"));
15628 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
15629 TYPE_FN_FIELDLISTS (type
) = (struct fn_fieldlist
*)
15631 sizeof (struct fn_fieldlist
) * fip
->fnfieldlists
.size ());
15633 for (int i
= 0; i
< fip
->fnfieldlists
.size (); i
++)
15635 struct fnfieldlist
&nf
= fip
->fnfieldlists
[i
];
15636 struct fn_fieldlist
*fn_flp
= &TYPE_FN_FIELDLIST (type
, i
);
15638 TYPE_FN_FIELDLIST_NAME (type
, i
) = nf
.name
;
15639 TYPE_FN_FIELDLIST_LENGTH (type
, i
) = nf
.fnfields
.size ();
15640 fn_flp
->fn_fields
= (struct fn_field
*)
15641 TYPE_ALLOC (type
, sizeof (struct fn_field
) * nf
.fnfields
.size ());
15643 for (int k
= 0; k
< nf
.fnfields
.size (); ++k
)
15644 fn_flp
->fn_fields
[k
] = nf
.fnfields
[k
];
15647 TYPE_NFN_FIELDS (type
) = fip
->fnfieldlists
.size ();
15650 /* Returns non-zero if NAME is the name of a vtable member in CU's
15651 language, zero otherwise. */
15653 is_vtable_name (const char *name
, struct dwarf2_cu
*cu
)
15655 static const char vptr
[] = "_vptr";
15657 /* Look for the C++ form of the vtable. */
15658 if (startswith (name
, vptr
) && is_cplus_marker (name
[sizeof (vptr
) - 1]))
15664 /* GCC outputs unnamed structures that are really pointers to member
15665 functions, with the ABI-specified layout. If TYPE describes
15666 such a structure, smash it into a member function type.
15668 GCC shouldn't do this; it should just output pointer to member DIEs.
15669 This is GCC PR debug/28767. */
15672 quirk_gcc_member_function_pointer (struct type
*type
, struct objfile
*objfile
)
15674 struct type
*pfn_type
, *self_type
, *new_type
;
15676 /* Check for a structure with no name and two children. */
15677 if (TYPE_CODE (type
) != TYPE_CODE_STRUCT
|| TYPE_NFIELDS (type
) != 2)
15680 /* Check for __pfn and __delta members. */
15681 if (TYPE_FIELD_NAME (type
, 0) == NULL
15682 || strcmp (TYPE_FIELD_NAME (type
, 0), "__pfn") != 0
15683 || TYPE_FIELD_NAME (type
, 1) == NULL
15684 || strcmp (TYPE_FIELD_NAME (type
, 1), "__delta") != 0)
15687 /* Find the type of the method. */
15688 pfn_type
= TYPE_FIELD_TYPE (type
, 0);
15689 if (pfn_type
== NULL
15690 || TYPE_CODE (pfn_type
) != TYPE_CODE_PTR
15691 || TYPE_CODE (TYPE_TARGET_TYPE (pfn_type
)) != TYPE_CODE_FUNC
)
15694 /* Look for the "this" argument. */
15695 pfn_type
= TYPE_TARGET_TYPE (pfn_type
);
15696 if (TYPE_NFIELDS (pfn_type
) == 0
15697 /* || TYPE_FIELD_TYPE (pfn_type, 0) == NULL */
15698 || TYPE_CODE (TYPE_FIELD_TYPE (pfn_type
, 0)) != TYPE_CODE_PTR
)
15701 self_type
= TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type
, 0));
15702 new_type
= alloc_type (objfile
);
15703 smash_to_method_type (new_type
, self_type
, TYPE_TARGET_TYPE (pfn_type
),
15704 TYPE_FIELDS (pfn_type
), TYPE_NFIELDS (pfn_type
),
15705 TYPE_VARARGS (pfn_type
));
15706 smash_to_methodptr_type (type
, new_type
);
15709 /* If the DIE has a DW_AT_alignment attribute, return its value, doing
15710 appropriate error checking and issuing complaints if there is a
15714 get_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
)
15716 struct attribute
*attr
= dwarf2_attr (die
, DW_AT_alignment
, cu
);
15718 if (attr
== nullptr)
15721 if (!attr_form_is_constant (attr
))
15723 complaint (_("DW_AT_alignment must have constant form"
15724 " - DIE at %s [in module %s]"),
15725 sect_offset_str (die
->sect_off
),
15726 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15731 if (attr
->form
== DW_FORM_sdata
)
15733 LONGEST val
= DW_SND (attr
);
15736 complaint (_("DW_AT_alignment value must not be negative"
15737 " - DIE at %s [in module %s]"),
15738 sect_offset_str (die
->sect_off
),
15739 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15745 align
= DW_UNSND (attr
);
15749 complaint (_("DW_AT_alignment value must not be zero"
15750 " - DIE at %s [in module %s]"),
15751 sect_offset_str (die
->sect_off
),
15752 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15755 if ((align
& (align
- 1)) != 0)
15757 complaint (_("DW_AT_alignment value must be a power of 2"
15758 " - DIE at %s [in module %s]"),
15759 sect_offset_str (die
->sect_off
),
15760 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15767 /* If the DIE has a DW_AT_alignment attribute, use its value to set
15768 the alignment for TYPE. */
15771 maybe_set_alignment (struct dwarf2_cu
*cu
, struct die_info
*die
,
15774 if (!set_type_align (type
, get_alignment (cu
, die
)))
15775 complaint (_("DW_AT_alignment value too large"
15776 " - DIE at %s [in module %s]"),
15777 sect_offset_str (die
->sect_off
),
15778 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15781 /* Called when we find the DIE that starts a structure or union scope
15782 (definition) to create a type for the structure or union. Fill in
15783 the type's name and general properties; the members will not be
15784 processed until process_structure_scope. A symbol table entry for
15785 the type will also not be done until process_structure_scope (assuming
15786 the type has a name).
15788 NOTE: we need to call these functions regardless of whether or not the
15789 DIE has a DW_AT_name attribute, since it might be an anonymous
15790 structure or union. This gets the type entered into our set of
15791 user defined types. */
15793 static struct type
*
15794 read_structure_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
15796 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
15798 struct attribute
*attr
;
15801 /* If the definition of this type lives in .debug_types, read that type.
15802 Don't follow DW_AT_specification though, that will take us back up
15803 the chain and we want to go down. */
15804 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
15807 type
= get_DW_AT_signature_type (die
, attr
, cu
);
15809 /* The type's CU may not be the same as CU.
15810 Ensure TYPE is recorded with CU in die_type_hash. */
15811 return set_die_type (die
, type
, cu
);
15814 type
= alloc_type (objfile
);
15815 INIT_CPLUS_SPECIFIC (type
);
15817 name
= dwarf2_name (die
, cu
);
15820 if (cu
->language
== language_cplus
15821 || cu
->language
== language_d
15822 || cu
->language
== language_rust
)
15824 const char *full_name
= dwarf2_full_name (name
, die
, cu
);
15826 /* dwarf2_full_name might have already finished building the DIE's
15827 type. If so, there is no need to continue. */
15828 if (get_die_type (die
, cu
) != NULL
)
15829 return get_die_type (die
, cu
);
15831 TYPE_NAME (type
) = full_name
;
15835 /* The name is already allocated along with this objfile, so
15836 we don't need to duplicate it for the type. */
15837 TYPE_NAME (type
) = name
;
15841 if (die
->tag
== DW_TAG_structure_type
)
15843 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15845 else if (die
->tag
== DW_TAG_union_type
)
15847 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15849 else if (die
->tag
== DW_TAG_variant_part
)
15851 TYPE_CODE (type
) = TYPE_CODE_UNION
;
15852 TYPE_FLAG_DISCRIMINATED_UNION (type
) = 1;
15856 TYPE_CODE (type
) = TYPE_CODE_STRUCT
;
15859 if (cu
->language
== language_cplus
&& die
->tag
== DW_TAG_class_type
)
15860 TYPE_DECLARED_CLASS (type
) = 1;
15862 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
15865 if (attr_form_is_constant (attr
))
15866 TYPE_LENGTH (type
) = DW_UNSND (attr
);
15869 /* For the moment, dynamic type sizes are not supported
15870 by GDB's struct type. The actual size is determined
15871 on-demand when resolving the type of a given object,
15872 so set the type's length to zero for now. Otherwise,
15873 we record an expression as the length, and that expression
15874 could lead to a very large value, which could eventually
15875 lead to us trying to allocate that much memory when creating
15876 a value of that type. */
15877 TYPE_LENGTH (type
) = 0;
15882 TYPE_LENGTH (type
) = 0;
15885 maybe_set_alignment (cu
, die
, type
);
15887 if (producer_is_icc_lt_14 (cu
) && (TYPE_LENGTH (type
) == 0))
15889 /* ICC<14 does not output the required DW_AT_declaration on
15890 incomplete types, but gives them a size of zero. */
15891 TYPE_STUB (type
) = 1;
15894 TYPE_STUB_SUPPORTED (type
) = 1;
15896 if (die_is_declaration (die
, cu
))
15897 TYPE_STUB (type
) = 1;
15898 else if (attr
== NULL
&& die
->child
== NULL
15899 && producer_is_realview (cu
->producer
))
15900 /* RealView does not output the required DW_AT_declaration
15901 on incomplete types. */
15902 TYPE_STUB (type
) = 1;
15904 /* We need to add the type field to the die immediately so we don't
15905 infinitely recurse when dealing with pointers to the structure
15906 type within the structure itself. */
15907 set_die_type (die
, type
, cu
);
15909 /* set_die_type should be already done. */
15910 set_descriptive_type (type
, die
, cu
);
15915 /* A helper for process_structure_scope that handles a single member
15919 handle_struct_member_die (struct die_info
*child_die
, struct type
*type
,
15920 struct field_info
*fi
,
15921 std::vector
<struct symbol
*> *template_args
,
15922 struct dwarf2_cu
*cu
)
15924 if (child_die
->tag
== DW_TAG_member
15925 || child_die
->tag
== DW_TAG_variable
15926 || child_die
->tag
== DW_TAG_variant_part
)
15928 /* NOTE: carlton/2002-11-05: A C++ static data member
15929 should be a DW_TAG_member that is a declaration, but
15930 all versions of G++ as of this writing (so through at
15931 least 3.2.1) incorrectly generate DW_TAG_variable
15932 tags for them instead. */
15933 dwarf2_add_field (fi
, child_die
, cu
);
15935 else if (child_die
->tag
== DW_TAG_subprogram
)
15937 /* Rust doesn't have member functions in the C++ sense.
15938 However, it does emit ordinary functions as children
15939 of a struct DIE. */
15940 if (cu
->language
== language_rust
)
15941 read_func_scope (child_die
, cu
);
15944 /* C++ member function. */
15945 dwarf2_add_member_fn (fi
, child_die
, type
, cu
);
15948 else if (child_die
->tag
== DW_TAG_inheritance
)
15950 /* C++ base class field. */
15951 dwarf2_add_field (fi
, child_die
, cu
);
15953 else if (type_can_define_types (child_die
))
15954 dwarf2_add_type_defn (fi
, child_die
, cu
);
15955 else if (child_die
->tag
== DW_TAG_template_type_param
15956 || child_die
->tag
== DW_TAG_template_value_param
)
15958 struct symbol
*arg
= new_symbol (child_die
, NULL
, cu
);
15961 template_args
->push_back (arg
);
15963 else if (child_die
->tag
== DW_TAG_variant
)
15965 /* In a variant we want to get the discriminant and also add a
15966 field for our sole member child. */
15967 struct attribute
*discr
= dwarf2_attr (child_die
, DW_AT_discr_value
, cu
);
15969 for (die_info
*variant_child
= child_die
->child
;
15970 variant_child
!= NULL
;
15971 variant_child
= sibling_die (variant_child
))
15973 if (variant_child
->tag
== DW_TAG_member
)
15975 handle_struct_member_die (variant_child
, type
, fi
,
15976 template_args
, cu
);
15977 /* Only handle the one. */
15982 /* We don't handle this but we might as well report it if we see
15984 if (dwarf2_attr (child_die
, DW_AT_discr_list
, cu
) != nullptr)
15985 complaint (_("DW_AT_discr_list is not supported yet"
15986 " - DIE at %s [in module %s]"),
15987 sect_offset_str (child_die
->sect_off
),
15988 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
15990 /* The first field was just added, so we can stash the
15991 discriminant there. */
15992 gdb_assert (!fi
->fields
.empty ());
15994 fi
->fields
.back ().variant
.default_branch
= true;
15996 fi
->fields
.back ().variant
.discriminant_value
= DW_UNSND (discr
);
16000 /* Finish creating a structure or union type, including filling in
16001 its members and creating a symbol for it. */
16004 process_structure_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16006 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16007 struct die_info
*child_die
;
16010 type
= get_die_type (die
, cu
);
16012 type
= read_structure_type (die
, cu
);
16014 /* When reading a DW_TAG_variant_part, we need to notice when we
16015 read the discriminant member, so we can record it later in the
16016 discriminant_info. */
16017 bool is_variant_part
= TYPE_FLAG_DISCRIMINATED_UNION (type
);
16018 sect_offset discr_offset
;
16019 bool has_template_parameters
= false;
16021 if (is_variant_part
)
16023 struct attribute
*discr
= dwarf2_attr (die
, DW_AT_discr
, cu
);
16026 /* Maybe it's a univariant form, an extension we support.
16027 In this case arrange not to check the offset. */
16028 is_variant_part
= false;
16030 else if (attr_form_is_ref (discr
))
16032 struct dwarf2_cu
*target_cu
= cu
;
16033 struct die_info
*target_die
= follow_die_ref (die
, discr
, &target_cu
);
16035 discr_offset
= target_die
->sect_off
;
16039 complaint (_("DW_AT_discr does not have DIE reference form"
16040 " - DIE at %s [in module %s]"),
16041 sect_offset_str (die
->sect_off
),
16042 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16043 is_variant_part
= false;
16047 if (die
->child
!= NULL
&& ! die_is_declaration (die
, cu
))
16049 struct field_info fi
;
16050 std::vector
<struct symbol
*> template_args
;
16052 child_die
= die
->child
;
16054 while (child_die
&& child_die
->tag
)
16056 handle_struct_member_die (child_die
, type
, &fi
, &template_args
, cu
);
16058 if (is_variant_part
&& discr_offset
== child_die
->sect_off
)
16059 fi
.fields
.back ().variant
.is_discriminant
= true;
16061 child_die
= sibling_die (child_die
);
16064 /* Attach template arguments to type. */
16065 if (!template_args
.empty ())
16067 has_template_parameters
= true;
16068 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16069 TYPE_N_TEMPLATE_ARGUMENTS (type
) = template_args
.size ();
16070 TYPE_TEMPLATE_ARGUMENTS (type
)
16071 = XOBNEWVEC (&objfile
->objfile_obstack
,
16073 TYPE_N_TEMPLATE_ARGUMENTS (type
));
16074 memcpy (TYPE_TEMPLATE_ARGUMENTS (type
),
16075 template_args
.data (),
16076 (TYPE_N_TEMPLATE_ARGUMENTS (type
)
16077 * sizeof (struct symbol
*)));
16080 /* Attach fields and member functions to the type. */
16082 dwarf2_attach_fields_to_type (&fi
, type
, cu
);
16083 if (!fi
.fnfieldlists
.empty ())
16085 dwarf2_attach_fn_fields_to_type (&fi
, type
, cu
);
16087 /* Get the type which refers to the base class (possibly this
16088 class itself) which contains the vtable pointer for the current
16089 class from the DW_AT_containing_type attribute. This use of
16090 DW_AT_containing_type is a GNU extension. */
16092 if (dwarf2_attr (die
, DW_AT_containing_type
, cu
) != NULL
)
16094 struct type
*t
= die_containing_type (die
, cu
);
16096 set_type_vptr_basetype (type
, t
);
16101 /* Our own class provides vtbl ptr. */
16102 for (i
= TYPE_NFIELDS (t
) - 1;
16103 i
>= TYPE_N_BASECLASSES (t
);
16106 const char *fieldname
= TYPE_FIELD_NAME (t
, i
);
16108 if (is_vtable_name (fieldname
, cu
))
16110 set_type_vptr_fieldno (type
, i
);
16115 /* Complain if virtual function table field not found. */
16116 if (i
< TYPE_N_BASECLASSES (t
))
16117 complaint (_("virtual function table pointer "
16118 "not found when defining class '%s'"),
16119 TYPE_NAME (type
) ? TYPE_NAME (type
) : "");
16123 set_type_vptr_fieldno (type
, TYPE_VPTR_FIELDNO (t
));
16126 else if (cu
->producer
16127 && startswith (cu
->producer
, "IBM(R) XL C/C++ Advanced Edition"))
16129 /* The IBM XLC compiler does not provide direct indication
16130 of the containing type, but the vtable pointer is
16131 always named __vfp. */
16135 for (i
= TYPE_NFIELDS (type
) - 1;
16136 i
>= TYPE_N_BASECLASSES (type
);
16139 if (strcmp (TYPE_FIELD_NAME (type
, i
), "__vfp") == 0)
16141 set_type_vptr_fieldno (type
, i
);
16142 set_type_vptr_basetype (type
, type
);
16149 /* Copy fi.typedef_field_list linked list elements content into the
16150 allocated array TYPE_TYPEDEF_FIELD_ARRAY (type). */
16151 if (!fi
.typedef_field_list
.empty ())
16153 int count
= fi
.typedef_field_list
.size ();
16155 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16156 TYPE_TYPEDEF_FIELD_ARRAY (type
)
16157 = ((struct decl_field
*)
16159 sizeof (TYPE_TYPEDEF_FIELD (type
, 0)) * count
));
16160 TYPE_TYPEDEF_FIELD_COUNT (type
) = count
;
16162 for (int i
= 0; i
< fi
.typedef_field_list
.size (); ++i
)
16163 TYPE_TYPEDEF_FIELD (type
, i
) = fi
.typedef_field_list
[i
];
16166 /* Copy fi.nested_types_list linked list elements content into the
16167 allocated array TYPE_NESTED_TYPES_ARRAY (type). */
16168 if (!fi
.nested_types_list
.empty () && cu
->language
!= language_ada
)
16170 int count
= fi
.nested_types_list
.size ();
16172 ALLOCATE_CPLUS_STRUCT_TYPE (type
);
16173 TYPE_NESTED_TYPES_ARRAY (type
)
16174 = ((struct decl_field
*)
16175 TYPE_ALLOC (type
, sizeof (struct decl_field
) * count
));
16176 TYPE_NESTED_TYPES_COUNT (type
) = count
;
16178 for (int i
= 0; i
< fi
.nested_types_list
.size (); ++i
)
16179 TYPE_NESTED_TYPES_FIELD (type
, i
) = fi
.nested_types_list
[i
];
16183 quirk_gcc_member_function_pointer (type
, objfile
);
16184 if (cu
->language
== language_rust
&& die
->tag
== DW_TAG_union_type
)
16185 cu
->rust_unions
.push_back (type
);
16187 /* NOTE: carlton/2004-03-16: GCC 3.4 (or at least one of its
16188 snapshots) has been known to create a die giving a declaration
16189 for a class that has, as a child, a die giving a definition for a
16190 nested class. So we have to process our children even if the
16191 current die is a declaration. Normally, of course, a declaration
16192 won't have any children at all. */
16194 child_die
= die
->child
;
16196 while (child_die
!= NULL
&& child_die
->tag
)
16198 if (child_die
->tag
== DW_TAG_member
16199 || child_die
->tag
== DW_TAG_variable
16200 || child_die
->tag
== DW_TAG_inheritance
16201 || child_die
->tag
== DW_TAG_template_value_param
16202 || child_die
->tag
== DW_TAG_template_type_param
)
16207 process_die (child_die
, cu
);
16209 child_die
= sibling_die (child_die
);
16212 /* Do not consider external references. According to the DWARF standard,
16213 these DIEs are identified by the fact that they have no byte_size
16214 attribute, and a declaration attribute. */
16215 if (dwarf2_attr (die
, DW_AT_byte_size
, cu
) != NULL
16216 || !die_is_declaration (die
, cu
))
16218 struct symbol
*sym
= new_symbol (die
, type
, cu
);
16220 if (has_template_parameters
)
16222 struct symtab
*symtab
;
16223 if (sym
!= nullptr)
16224 symtab
= symbol_symtab (sym
);
16225 else if (cu
->line_header
!= nullptr)
16227 /* Any related symtab will do. */
16229 = cu
->line_header
->file_name_at (file_name_index (1))->symtab
;
16234 complaint (_("could not find suitable "
16235 "symtab for template parameter"
16236 " - DIE at %s [in module %s]"),
16237 sect_offset_str (die
->sect_off
),
16238 objfile_name (objfile
));
16241 if (symtab
!= nullptr)
16243 /* Make sure that the symtab is set on the new symbols.
16244 Even though they don't appear in this symtab directly,
16245 other parts of gdb assume that symbols do, and this is
16246 reasonably true. */
16247 for (int i
= 0; i
< TYPE_N_TEMPLATE_ARGUMENTS (type
); ++i
)
16248 symbol_set_symtab (TYPE_TEMPLATE_ARGUMENT (type
, i
), symtab
);
16254 /* Assuming DIE is an enumeration type, and TYPE is its associated type,
16255 update TYPE using some information only available in DIE's children. */
16258 update_enumeration_type_from_children (struct die_info
*die
,
16260 struct dwarf2_cu
*cu
)
16262 struct die_info
*child_die
;
16263 int unsigned_enum
= 1;
16267 auto_obstack obstack
;
16269 for (child_die
= die
->child
;
16270 child_die
!= NULL
&& child_die
->tag
;
16271 child_die
= sibling_die (child_die
))
16273 struct attribute
*attr
;
16275 const gdb_byte
*bytes
;
16276 struct dwarf2_locexpr_baton
*baton
;
16279 if (child_die
->tag
!= DW_TAG_enumerator
)
16282 attr
= dwarf2_attr (child_die
, DW_AT_const_value
, cu
);
16286 name
= dwarf2_name (child_die
, cu
);
16288 name
= "<anonymous enumerator>";
16290 dwarf2_const_value_attr (attr
, type
, name
, &obstack
, cu
,
16291 &value
, &bytes
, &baton
);
16297 else if ((mask
& value
) != 0)
16302 /* If we already know that the enum type is neither unsigned, nor
16303 a flag type, no need to look at the rest of the enumerates. */
16304 if (!unsigned_enum
&& !flag_enum
)
16309 TYPE_UNSIGNED (type
) = 1;
16311 TYPE_FLAG_ENUM (type
) = 1;
16314 /* Given a DW_AT_enumeration_type die, set its type. We do not
16315 complete the type's fields yet, or create any symbols. */
16317 static struct type
*
16318 read_enumeration_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16320 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16322 struct attribute
*attr
;
16325 /* If the definition of this type lives in .debug_types, read that type.
16326 Don't follow DW_AT_specification though, that will take us back up
16327 the chain and we want to go down. */
16328 attr
= dwarf2_attr_no_follow (die
, DW_AT_signature
);
16331 type
= get_DW_AT_signature_type (die
, attr
, cu
);
16333 /* The type's CU may not be the same as CU.
16334 Ensure TYPE is recorded with CU in die_type_hash. */
16335 return set_die_type (die
, type
, cu
);
16338 type
= alloc_type (objfile
);
16340 TYPE_CODE (type
) = TYPE_CODE_ENUM
;
16341 name
= dwarf2_full_name (NULL
, die
, cu
);
16343 TYPE_NAME (type
) = name
;
16345 attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
16348 struct type
*underlying_type
= die_type (die
, cu
);
16350 TYPE_TARGET_TYPE (type
) = underlying_type
;
16353 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16356 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16360 TYPE_LENGTH (type
) = 0;
16363 maybe_set_alignment (cu
, die
, type
);
16365 /* The enumeration DIE can be incomplete. In Ada, any type can be
16366 declared as private in the package spec, and then defined only
16367 inside the package body. Such types are known as Taft Amendment
16368 Types. When another package uses such a type, an incomplete DIE
16369 may be generated by the compiler. */
16370 if (die_is_declaration (die
, cu
))
16371 TYPE_STUB (type
) = 1;
16373 /* Finish the creation of this type by using the enum's children.
16374 We must call this even when the underlying type has been provided
16375 so that we can determine if we're looking at a "flag" enum. */
16376 update_enumeration_type_from_children (die
, type
, cu
);
16378 /* If this type has an underlying type that is not a stub, then we
16379 may use its attributes. We always use the "unsigned" attribute
16380 in this situation, because ordinarily we guess whether the type
16381 is unsigned -- but the guess can be wrong and the underlying type
16382 can tell us the reality. However, we defer to a local size
16383 attribute if one exists, because this lets the compiler override
16384 the underlying type if needed. */
16385 if (TYPE_TARGET_TYPE (type
) != NULL
&& !TYPE_STUB (TYPE_TARGET_TYPE (type
)))
16387 TYPE_UNSIGNED (type
) = TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
));
16388 if (TYPE_LENGTH (type
) == 0)
16389 TYPE_LENGTH (type
) = TYPE_LENGTH (TYPE_TARGET_TYPE (type
));
16390 if (TYPE_RAW_ALIGN (type
) == 0
16391 && TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)) != 0)
16392 set_type_align (type
, TYPE_RAW_ALIGN (TYPE_TARGET_TYPE (type
)));
16395 TYPE_DECLARED_CLASS (type
) = dwarf2_flag_true_p (die
, DW_AT_enum_class
, cu
);
16397 return set_die_type (die
, type
, cu
);
16400 /* Given a pointer to a die which begins an enumeration, process all
16401 the dies that define the members of the enumeration, and create the
16402 symbol for the enumeration type.
16404 NOTE: We reverse the order of the element list. */
16407 process_enumeration_scope (struct die_info
*die
, struct dwarf2_cu
*cu
)
16409 struct type
*this_type
;
16411 this_type
= get_die_type (die
, cu
);
16412 if (this_type
== NULL
)
16413 this_type
= read_enumeration_type (die
, cu
);
16415 if (die
->child
!= NULL
)
16417 struct die_info
*child_die
;
16418 struct symbol
*sym
;
16419 struct field
*fields
= NULL
;
16420 int num_fields
= 0;
16423 child_die
= die
->child
;
16424 while (child_die
&& child_die
->tag
)
16426 if (child_die
->tag
!= DW_TAG_enumerator
)
16428 process_die (child_die
, cu
);
16432 name
= dwarf2_name (child_die
, cu
);
16435 sym
= new_symbol (child_die
, this_type
, cu
);
16437 if ((num_fields
% DW_FIELD_ALLOC_CHUNK
) == 0)
16439 fields
= (struct field
*)
16441 (num_fields
+ DW_FIELD_ALLOC_CHUNK
)
16442 * sizeof (struct field
));
16445 FIELD_NAME (fields
[num_fields
]) = SYMBOL_LINKAGE_NAME (sym
);
16446 FIELD_TYPE (fields
[num_fields
]) = NULL
;
16447 SET_FIELD_ENUMVAL (fields
[num_fields
], SYMBOL_VALUE (sym
));
16448 FIELD_BITSIZE (fields
[num_fields
]) = 0;
16454 child_die
= sibling_die (child_die
);
16459 TYPE_NFIELDS (this_type
) = num_fields
;
16460 TYPE_FIELDS (this_type
) = (struct field
*)
16461 TYPE_ALLOC (this_type
, sizeof (struct field
) * num_fields
);
16462 memcpy (TYPE_FIELDS (this_type
), fields
,
16463 sizeof (struct field
) * num_fields
);
16468 /* If we are reading an enum from a .debug_types unit, and the enum
16469 is a declaration, and the enum is not the signatured type in the
16470 unit, then we do not want to add a symbol for it. Adding a
16471 symbol would in some cases obscure the true definition of the
16472 enum, giving users an incomplete type when the definition is
16473 actually available. Note that we do not want to do this for all
16474 enums which are just declarations, because C++0x allows forward
16475 enum declarations. */
16476 if (cu
->per_cu
->is_debug_types
16477 && die_is_declaration (die
, cu
))
16479 struct signatured_type
*sig_type
;
16481 sig_type
= (struct signatured_type
*) cu
->per_cu
;
16482 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
16483 if (sig_type
->type_offset_in_section
!= die
->sect_off
)
16487 new_symbol (die
, this_type
, cu
);
16490 /* Extract all information from a DW_TAG_array_type DIE and put it in
16491 the DIE's type field. For now, this only handles one dimensional
16494 static struct type
*
16495 read_array_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16497 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16498 struct die_info
*child_die
;
16500 struct type
*element_type
, *range_type
, *index_type
;
16501 struct attribute
*attr
;
16503 struct dynamic_prop
*byte_stride_prop
= NULL
;
16504 unsigned int bit_stride
= 0;
16506 element_type
= die_type (die
, cu
);
16508 /* The die_type call above may have already set the type for this DIE. */
16509 type
= get_die_type (die
, cu
);
16513 attr
= dwarf2_attr (die
, DW_AT_byte_stride
, cu
);
16519 = (struct dynamic_prop
*) alloca (sizeof (struct dynamic_prop
));
16520 stride_ok
= attr_to_dynamic_prop (attr
, die
, cu
, byte_stride_prop
);
16523 complaint (_("unable to read array DW_AT_byte_stride "
16524 " - DIE at %s [in module %s]"),
16525 sect_offset_str (die
->sect_off
),
16526 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
16527 /* Ignore this attribute. We will likely not be able to print
16528 arrays of this type correctly, but there is little we can do
16529 to help if we cannot read the attribute's value. */
16530 byte_stride_prop
= NULL
;
16534 attr
= dwarf2_attr (die
, DW_AT_bit_stride
, cu
);
16536 bit_stride
= DW_UNSND (attr
);
16538 /* Irix 6.2 native cc creates array types without children for
16539 arrays with unspecified length. */
16540 if (die
->child
== NULL
)
16542 index_type
= objfile_type (objfile
)->builtin_int
;
16543 range_type
= create_static_range_type (NULL
, index_type
, 0, -1);
16544 type
= create_array_type_with_stride (NULL
, element_type
, range_type
,
16545 byte_stride_prop
, bit_stride
);
16546 return set_die_type (die
, type
, cu
);
16549 std::vector
<struct type
*> range_types
;
16550 child_die
= die
->child
;
16551 while (child_die
&& child_die
->tag
)
16553 if (child_die
->tag
== DW_TAG_subrange_type
)
16555 struct type
*child_type
= read_type_die (child_die
, cu
);
16557 if (child_type
!= NULL
)
16559 /* The range type was succesfully read. Save it for the
16560 array type creation. */
16561 range_types
.push_back (child_type
);
16564 child_die
= sibling_die (child_die
);
16567 /* Dwarf2 dimensions are output from left to right, create the
16568 necessary array types in backwards order. */
16570 type
= element_type
;
16572 if (read_array_order (die
, cu
) == DW_ORD_col_major
)
16576 while (i
< range_types
.size ())
16577 type
= create_array_type_with_stride (NULL
, type
, range_types
[i
++],
16578 byte_stride_prop
, bit_stride
);
16582 size_t ndim
= range_types
.size ();
16584 type
= create_array_type_with_stride (NULL
, type
, range_types
[ndim
],
16585 byte_stride_prop
, bit_stride
);
16588 /* Understand Dwarf2 support for vector types (like they occur on
16589 the PowerPC w/ AltiVec). Gcc just adds another attribute to the
16590 array type. This is not part of the Dwarf2/3 standard yet, but a
16591 custom vendor extension. The main difference between a regular
16592 array and the vector variant is that vectors are passed by value
16594 attr
= dwarf2_attr (die
, DW_AT_GNU_vector
, cu
);
16596 make_vector_type (type
);
16598 /* The DIE may have DW_AT_byte_size set. For example an OpenCL
16599 implementation may choose to implement triple vectors using this
16601 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16604 if (DW_UNSND (attr
) >= TYPE_LENGTH (type
))
16605 TYPE_LENGTH (type
) = DW_UNSND (attr
);
16607 complaint (_("DW_AT_byte_size for array type smaller "
16608 "than the total size of elements"));
16611 name
= dwarf2_name (die
, cu
);
16613 TYPE_NAME (type
) = name
;
16615 maybe_set_alignment (cu
, die
, type
);
16617 /* Install the type in the die. */
16618 set_die_type (die
, type
, cu
);
16620 /* set_die_type should be already done. */
16621 set_descriptive_type (type
, die
, cu
);
16626 static enum dwarf_array_dim_ordering
16627 read_array_order (struct die_info
*die
, struct dwarf2_cu
*cu
)
16629 struct attribute
*attr
;
16631 attr
= dwarf2_attr (die
, DW_AT_ordering
, cu
);
16634 return (enum dwarf_array_dim_ordering
) DW_SND (attr
);
16636 /* GNU F77 is a special case, as at 08/2004 array type info is the
16637 opposite order to the dwarf2 specification, but data is still
16638 laid out as per normal fortran.
16640 FIXME: dsl/2004-8-20: If G77 is ever fixed, this will also need
16641 version checking. */
16643 if (cu
->language
== language_fortran
16644 && cu
->producer
&& strstr (cu
->producer
, "GNU F77"))
16646 return DW_ORD_row_major
;
16649 switch (cu
->language_defn
->la_array_ordering
)
16651 case array_column_major
:
16652 return DW_ORD_col_major
;
16653 case array_row_major
:
16655 return DW_ORD_row_major
;
16659 /* Extract all information from a DW_TAG_set_type DIE and put it in
16660 the DIE's type field. */
16662 static struct type
*
16663 read_set_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16665 struct type
*domain_type
, *set_type
;
16666 struct attribute
*attr
;
16668 domain_type
= die_type (die
, cu
);
16670 /* The die_type call above may have already set the type for this DIE. */
16671 set_type
= get_die_type (die
, cu
);
16675 set_type
= create_set_type (NULL
, domain_type
);
16677 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
16679 TYPE_LENGTH (set_type
) = DW_UNSND (attr
);
16681 maybe_set_alignment (cu
, die
, set_type
);
16683 return set_die_type (die
, set_type
, cu
);
16686 /* A helper for read_common_block that creates a locexpr baton.
16687 SYM is the symbol which we are marking as computed.
16688 COMMON_DIE is the DIE for the common block.
16689 COMMON_LOC is the location expression attribute for the common
16691 MEMBER_LOC is the location expression attribute for the particular
16692 member of the common block that we are processing.
16693 CU is the CU from which the above come. */
16696 mark_common_block_symbol_computed (struct symbol
*sym
,
16697 struct die_info
*common_die
,
16698 struct attribute
*common_loc
,
16699 struct attribute
*member_loc
,
16700 struct dwarf2_cu
*cu
)
16702 struct dwarf2_per_objfile
*dwarf2_per_objfile
16703 = cu
->per_cu
->dwarf2_per_objfile
;
16704 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
16705 struct dwarf2_locexpr_baton
*baton
;
16707 unsigned int cu_off
;
16708 enum bfd_endian byte_order
= gdbarch_byte_order (get_objfile_arch (objfile
));
16709 LONGEST offset
= 0;
16711 gdb_assert (common_loc
&& member_loc
);
16712 gdb_assert (attr_form_is_block (common_loc
));
16713 gdb_assert (attr_form_is_block (member_loc
)
16714 || attr_form_is_constant (member_loc
));
16716 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
16717 baton
->per_cu
= cu
->per_cu
;
16718 gdb_assert (baton
->per_cu
);
16720 baton
->size
= 5 /* DW_OP_call4 */ + 1 /* DW_OP_plus */;
16722 if (attr_form_is_constant (member_loc
))
16724 offset
= dwarf2_get_attr_constant_value (member_loc
, 0);
16725 baton
->size
+= 1 /* DW_OP_addr */ + cu
->header
.addr_size
;
16728 baton
->size
+= DW_BLOCK (member_loc
)->size
;
16730 ptr
= (gdb_byte
*) obstack_alloc (&objfile
->objfile_obstack
, baton
->size
);
16733 *ptr
++ = DW_OP_call4
;
16734 cu_off
= common_die
->sect_off
- cu
->per_cu
->sect_off
;
16735 store_unsigned_integer (ptr
, 4, byte_order
, cu_off
);
16738 if (attr_form_is_constant (member_loc
))
16740 *ptr
++ = DW_OP_addr
;
16741 store_unsigned_integer (ptr
, cu
->header
.addr_size
, byte_order
, offset
);
16742 ptr
+= cu
->header
.addr_size
;
16746 /* We have to copy the data here, because DW_OP_call4 will only
16747 use a DW_AT_location attribute. */
16748 memcpy (ptr
, DW_BLOCK (member_loc
)->data
, DW_BLOCK (member_loc
)->size
);
16749 ptr
+= DW_BLOCK (member_loc
)->size
;
16752 *ptr
++ = DW_OP_plus
;
16753 gdb_assert (ptr
- baton
->data
== baton
->size
);
16755 SYMBOL_LOCATION_BATON (sym
) = baton
;
16756 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
16759 /* Create appropriate locally-scoped variables for all the
16760 DW_TAG_common_block entries. Also create a struct common_block
16761 listing all such variables for `info common'. COMMON_BLOCK_DOMAIN
16762 is used to sepate the common blocks name namespace from regular
16766 read_common_block (struct die_info
*die
, struct dwarf2_cu
*cu
)
16768 struct attribute
*attr
;
16770 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
16773 /* Support the .debug_loc offsets. */
16774 if (attr_form_is_block (attr
))
16778 else if (attr_form_is_section_offset (attr
))
16780 dwarf2_complex_location_expr_complaint ();
16785 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
16786 "common block member");
16791 if (die
->child
!= NULL
)
16793 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16794 struct die_info
*child_die
;
16795 size_t n_entries
= 0, size
;
16796 struct common_block
*common_block
;
16797 struct symbol
*sym
;
16799 for (child_die
= die
->child
;
16800 child_die
&& child_die
->tag
;
16801 child_die
= sibling_die (child_die
))
16804 size
= (sizeof (struct common_block
)
16805 + (n_entries
- 1) * sizeof (struct symbol
*));
16807 = (struct common_block
*) obstack_alloc (&objfile
->objfile_obstack
,
16809 memset (common_block
->contents
, 0, n_entries
* sizeof (struct symbol
*));
16810 common_block
->n_entries
= 0;
16812 for (child_die
= die
->child
;
16813 child_die
&& child_die
->tag
;
16814 child_die
= sibling_die (child_die
))
16816 /* Create the symbol in the DW_TAG_common_block block in the current
16818 sym
= new_symbol (child_die
, NULL
, cu
);
16821 struct attribute
*member_loc
;
16823 common_block
->contents
[common_block
->n_entries
++] = sym
;
16825 member_loc
= dwarf2_attr (child_die
, DW_AT_data_member_location
,
16829 /* GDB has handled this for a long time, but it is
16830 not specified by DWARF. It seems to have been
16831 emitted by gfortran at least as recently as:
16832 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23057. */
16833 complaint (_("Variable in common block has "
16834 "DW_AT_data_member_location "
16835 "- DIE at %s [in module %s]"),
16836 sect_offset_str (child_die
->sect_off
),
16837 objfile_name (objfile
));
16839 if (attr_form_is_section_offset (member_loc
))
16840 dwarf2_complex_location_expr_complaint ();
16841 else if (attr_form_is_constant (member_loc
)
16842 || attr_form_is_block (member_loc
))
16845 mark_common_block_symbol_computed (sym
, die
, attr
,
16849 dwarf2_complex_location_expr_complaint ();
16854 sym
= new_symbol (die
, objfile_type (objfile
)->builtin_void
, cu
);
16855 SYMBOL_VALUE_COMMON_BLOCK (sym
) = common_block
;
16859 /* Create a type for a C++ namespace. */
16861 static struct type
*
16862 read_namespace_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16864 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16865 const char *previous_prefix
, *name
;
16869 /* For extensions, reuse the type of the original namespace. */
16870 if (dwarf2_attr (die
, DW_AT_extension
, cu
) != NULL
)
16872 struct die_info
*ext_die
;
16873 struct dwarf2_cu
*ext_cu
= cu
;
16875 ext_die
= dwarf2_extension (die
, &ext_cu
);
16876 type
= read_type_die (ext_die
, ext_cu
);
16878 /* EXT_CU may not be the same as CU.
16879 Ensure TYPE is recorded with CU in die_type_hash. */
16880 return set_die_type (die
, type
, cu
);
16883 name
= namespace_name (die
, &is_anonymous
, cu
);
16885 /* Now build the name of the current namespace. */
16887 previous_prefix
= determine_prefix (die
, cu
);
16888 if (previous_prefix
[0] != '\0')
16889 name
= typename_concat (&objfile
->objfile_obstack
,
16890 previous_prefix
, name
, 0, cu
);
16892 /* Create the type. */
16893 type
= init_type (objfile
, TYPE_CODE_NAMESPACE
, 0, name
);
16895 return set_die_type (die
, type
, cu
);
16898 /* Read a namespace scope. */
16901 read_namespace (struct die_info
*die
, struct dwarf2_cu
*cu
)
16903 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16906 /* Add a symbol associated to this if we haven't seen the namespace
16907 before. Also, add a using directive if it's an anonymous
16910 if (dwarf2_attr (die
, DW_AT_extension
, cu
) == NULL
)
16914 type
= read_type_die (die
, cu
);
16915 new_symbol (die
, type
, cu
);
16917 namespace_name (die
, &is_anonymous
, cu
);
16920 const char *previous_prefix
= determine_prefix (die
, cu
);
16922 std::vector
<const char *> excludes
;
16923 add_using_directive (using_directives (cu
),
16924 previous_prefix
, TYPE_NAME (type
), NULL
,
16925 NULL
, excludes
, 0, &objfile
->objfile_obstack
);
16929 if (die
->child
!= NULL
)
16931 struct die_info
*child_die
= die
->child
;
16933 while (child_die
&& child_die
->tag
)
16935 process_die (child_die
, cu
);
16936 child_die
= sibling_die (child_die
);
16941 /* Read a Fortran module as type. This DIE can be only a declaration used for
16942 imported module. Still we need that type as local Fortran "use ... only"
16943 declaration imports depend on the created type in determine_prefix. */
16945 static struct type
*
16946 read_module_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
16948 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
16949 const char *module_name
;
16952 module_name
= dwarf2_name (die
, cu
);
16954 complaint (_("DW_TAG_module has no name, offset %s"),
16955 sect_offset_str (die
->sect_off
));
16956 type
= init_type (objfile
, TYPE_CODE_MODULE
, 0, module_name
);
16958 return set_die_type (die
, type
, cu
);
16961 /* Read a Fortran module. */
16964 read_module (struct die_info
*die
, struct dwarf2_cu
*cu
)
16966 struct die_info
*child_die
= die
->child
;
16969 type
= read_type_die (die
, cu
);
16970 new_symbol (die
, type
, cu
);
16972 while (child_die
&& child_die
->tag
)
16974 process_die (child_die
, cu
);
16975 child_die
= sibling_die (child_die
);
16979 /* Return the name of the namespace represented by DIE. Set
16980 *IS_ANONYMOUS to tell whether or not the namespace is an anonymous
16983 static const char *
16984 namespace_name (struct die_info
*die
, int *is_anonymous
, struct dwarf2_cu
*cu
)
16986 struct die_info
*current_die
;
16987 const char *name
= NULL
;
16989 /* Loop through the extensions until we find a name. */
16991 for (current_die
= die
;
16992 current_die
!= NULL
;
16993 current_die
= dwarf2_extension (die
, &cu
))
16995 /* We don't use dwarf2_name here so that we can detect the absence
16996 of a name -> anonymous namespace. */
16997 name
= dwarf2_string_attr (die
, DW_AT_name
, cu
);
17003 /* Is it an anonymous namespace? */
17005 *is_anonymous
= (name
== NULL
);
17007 name
= CP_ANONYMOUS_NAMESPACE_STR
;
17012 /* Extract all information from a DW_TAG_pointer_type DIE and add to
17013 the user defined type vector. */
17015 static struct type
*
17016 read_tag_pointer_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17018 struct gdbarch
*gdbarch
17019 = get_objfile_arch (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
17020 struct comp_unit_head
*cu_header
= &cu
->header
;
17022 struct attribute
*attr_byte_size
;
17023 struct attribute
*attr_address_class
;
17024 int byte_size
, addr_class
;
17025 struct type
*target_type
;
17027 target_type
= die_type (die
, cu
);
17029 /* The die_type call above may have already set the type for this DIE. */
17030 type
= get_die_type (die
, cu
);
17034 type
= lookup_pointer_type (target_type
);
17036 attr_byte_size
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17037 if (attr_byte_size
)
17038 byte_size
= DW_UNSND (attr_byte_size
);
17040 byte_size
= cu_header
->addr_size
;
17042 attr_address_class
= dwarf2_attr (die
, DW_AT_address_class
, cu
);
17043 if (attr_address_class
)
17044 addr_class
= DW_UNSND (attr_address_class
);
17046 addr_class
= DW_ADDR_none
;
17048 ULONGEST alignment
= get_alignment (cu
, die
);
17050 /* If the pointer size, alignment, or address class is different
17051 than the default, create a type variant marked as such and set
17052 the length accordingly. */
17053 if (TYPE_LENGTH (type
) != byte_size
17054 || (alignment
!= 0 && TYPE_RAW_ALIGN (type
) != 0
17055 && alignment
!= TYPE_RAW_ALIGN (type
))
17056 || addr_class
!= DW_ADDR_none
)
17058 if (gdbarch_address_class_type_flags_p (gdbarch
))
17062 type_flags
= gdbarch_address_class_type_flags
17063 (gdbarch
, byte_size
, addr_class
);
17064 gdb_assert ((type_flags
& ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL
)
17066 type
= make_type_with_address_space (type
, type_flags
);
17068 else if (TYPE_LENGTH (type
) != byte_size
)
17070 complaint (_("invalid pointer size %d"), byte_size
);
17072 else if (TYPE_RAW_ALIGN (type
) != alignment
)
17074 complaint (_("Invalid DW_AT_alignment"
17075 " - DIE at %s [in module %s]"),
17076 sect_offset_str (die
->sect_off
),
17077 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17081 /* Should we also complain about unhandled address classes? */
17085 TYPE_LENGTH (type
) = byte_size
;
17086 set_type_align (type
, alignment
);
17087 return set_die_type (die
, type
, cu
);
17090 /* Extract all information from a DW_TAG_ptr_to_member_type DIE and add to
17091 the user defined type vector. */
17093 static struct type
*
17094 read_tag_ptr_to_member_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17097 struct type
*to_type
;
17098 struct type
*domain
;
17100 to_type
= die_type (die
, cu
);
17101 domain
= die_containing_type (die
, cu
);
17103 /* The calls above may have already set the type for this DIE. */
17104 type
= get_die_type (die
, cu
);
17108 if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_METHOD
)
17109 type
= lookup_methodptr_type (to_type
);
17110 else if (TYPE_CODE (check_typedef (to_type
)) == TYPE_CODE_FUNC
)
17112 struct type
*new_type
17113 = alloc_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
);
17115 smash_to_method_type (new_type
, domain
, TYPE_TARGET_TYPE (to_type
),
17116 TYPE_FIELDS (to_type
), TYPE_NFIELDS (to_type
),
17117 TYPE_VARARGS (to_type
));
17118 type
= lookup_methodptr_type (new_type
);
17121 type
= lookup_memberptr_type (to_type
, domain
);
17123 return set_die_type (die
, type
, cu
);
17126 /* Extract all information from a DW_TAG_{rvalue_,}reference_type DIE and add to
17127 the user defined type vector. */
17129 static struct type
*
17130 read_tag_reference_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17131 enum type_code refcode
)
17133 struct comp_unit_head
*cu_header
= &cu
->header
;
17134 struct type
*type
, *target_type
;
17135 struct attribute
*attr
;
17137 gdb_assert (refcode
== TYPE_CODE_REF
|| refcode
== TYPE_CODE_RVALUE_REF
);
17139 target_type
= die_type (die
, cu
);
17141 /* The die_type call above may have already set the type for this DIE. */
17142 type
= get_die_type (die
, cu
);
17146 type
= lookup_reference_type (target_type
, refcode
);
17147 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17150 TYPE_LENGTH (type
) = DW_UNSND (attr
);
17154 TYPE_LENGTH (type
) = cu_header
->addr_size
;
17156 maybe_set_alignment (cu
, die
, type
);
17157 return set_die_type (die
, type
, cu
);
17160 /* Add the given cv-qualifiers to the element type of the array. GCC
17161 outputs DWARF type qualifiers that apply to an array, not the
17162 element type. But GDB relies on the array element type to carry
17163 the cv-qualifiers. This mimics section 6.7.3 of the C99
17166 static struct type
*
17167 add_array_cv_type (struct die_info
*die
, struct dwarf2_cu
*cu
,
17168 struct type
*base_type
, int cnst
, int voltl
)
17170 struct type
*el_type
, *inner_array
;
17172 base_type
= copy_type (base_type
);
17173 inner_array
= base_type
;
17175 while (TYPE_CODE (TYPE_TARGET_TYPE (inner_array
)) == TYPE_CODE_ARRAY
)
17177 TYPE_TARGET_TYPE (inner_array
) =
17178 copy_type (TYPE_TARGET_TYPE (inner_array
));
17179 inner_array
= TYPE_TARGET_TYPE (inner_array
);
17182 el_type
= TYPE_TARGET_TYPE (inner_array
);
17183 cnst
|= TYPE_CONST (el_type
);
17184 voltl
|= TYPE_VOLATILE (el_type
);
17185 TYPE_TARGET_TYPE (inner_array
) = make_cv_type (cnst
, voltl
, el_type
, NULL
);
17187 return set_die_type (die
, base_type
, cu
);
17190 static struct type
*
17191 read_tag_const_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17193 struct type
*base_type
, *cv_type
;
17195 base_type
= die_type (die
, cu
);
17197 /* The die_type call above may have already set the type for this DIE. */
17198 cv_type
= get_die_type (die
, cu
);
17202 /* In case the const qualifier is applied to an array type, the element type
17203 is so qualified, not the array type (section 6.7.3 of C99). */
17204 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17205 return add_array_cv_type (die
, cu
, base_type
, 1, 0);
17207 cv_type
= make_cv_type (1, TYPE_VOLATILE (base_type
), base_type
, 0);
17208 return set_die_type (die
, cv_type
, cu
);
17211 static struct type
*
17212 read_tag_volatile_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17214 struct type
*base_type
, *cv_type
;
17216 base_type
= die_type (die
, cu
);
17218 /* The die_type call above may have already set the type for this DIE. */
17219 cv_type
= get_die_type (die
, cu
);
17223 /* In case the volatile qualifier is applied to an array type, the
17224 element type is so qualified, not the array type (section 6.7.3
17226 if (TYPE_CODE (base_type
) == TYPE_CODE_ARRAY
)
17227 return add_array_cv_type (die
, cu
, base_type
, 0, 1);
17229 cv_type
= make_cv_type (TYPE_CONST (base_type
), 1, base_type
, 0);
17230 return set_die_type (die
, cv_type
, cu
);
17233 /* Handle DW_TAG_restrict_type. */
17235 static struct type
*
17236 read_tag_restrict_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17238 struct type
*base_type
, *cv_type
;
17240 base_type
= die_type (die
, cu
);
17242 /* The die_type call above may have already set the type for this DIE. */
17243 cv_type
= get_die_type (die
, cu
);
17247 cv_type
= make_restrict_type (base_type
);
17248 return set_die_type (die
, cv_type
, cu
);
17251 /* Handle DW_TAG_atomic_type. */
17253 static struct type
*
17254 read_tag_atomic_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17256 struct type
*base_type
, *cv_type
;
17258 base_type
= die_type (die
, cu
);
17260 /* The die_type call above may have already set the type for this DIE. */
17261 cv_type
= get_die_type (die
, cu
);
17265 cv_type
= make_atomic_type (base_type
);
17266 return set_die_type (die
, cv_type
, cu
);
17269 /* Extract all information from a DW_TAG_string_type DIE and add to
17270 the user defined type vector. It isn't really a user defined type,
17271 but it behaves like one, with other DIE's using an AT_user_def_type
17272 attribute to reference it. */
17274 static struct type
*
17275 read_tag_string_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17277 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17278 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17279 struct type
*type
, *range_type
, *index_type
, *char_type
;
17280 struct attribute
*attr
;
17281 unsigned int length
;
17283 attr
= dwarf2_attr (die
, DW_AT_string_length
, cu
);
17286 length
= DW_UNSND (attr
);
17290 /* Check for the DW_AT_byte_size attribute. */
17291 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17294 length
= DW_UNSND (attr
);
17302 index_type
= objfile_type (objfile
)->builtin_int
;
17303 range_type
= create_static_range_type (NULL
, index_type
, 1, length
);
17304 char_type
= language_string_char_type (cu
->language_defn
, gdbarch
);
17305 type
= create_string_type (NULL
, char_type
, range_type
);
17307 return set_die_type (die
, type
, cu
);
17310 /* Assuming that DIE corresponds to a function, returns nonzero
17311 if the function is prototyped. */
17314 prototyped_function_p (struct die_info
*die
, struct dwarf2_cu
*cu
)
17316 struct attribute
*attr
;
17318 attr
= dwarf2_attr (die
, DW_AT_prototyped
, cu
);
17319 if (attr
&& (DW_UNSND (attr
) != 0))
17322 /* The DWARF standard implies that the DW_AT_prototyped attribute
17323 is only meaninful for C, but the concept also extends to other
17324 languages that allow unprototyped functions (Eg: Objective C).
17325 For all other languages, assume that functions are always
17327 if (cu
->language
!= language_c
17328 && cu
->language
!= language_objc
17329 && cu
->language
!= language_opencl
)
17332 /* RealView does not emit DW_AT_prototyped. We can not distinguish
17333 prototyped and unprototyped functions; default to prototyped,
17334 since that is more common in modern code (and RealView warns
17335 about unprototyped functions). */
17336 if (producer_is_realview (cu
->producer
))
17342 /* Handle DIES due to C code like:
17346 int (*funcp)(int a, long l);
17350 ('funcp' generates a DW_TAG_subroutine_type DIE). */
17352 static struct type
*
17353 read_subroutine_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17355 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17356 struct type
*type
; /* Type that this function returns. */
17357 struct type
*ftype
; /* Function that returns above type. */
17358 struct attribute
*attr
;
17360 type
= die_type (die
, cu
);
17362 /* The die_type call above may have already set the type for this DIE. */
17363 ftype
= get_die_type (die
, cu
);
17367 ftype
= lookup_function_type (type
);
17369 if (prototyped_function_p (die
, cu
))
17370 TYPE_PROTOTYPED (ftype
) = 1;
17372 /* Store the calling convention in the type if it's available in
17373 the subroutine die. Otherwise set the calling convention to
17374 the default value DW_CC_normal. */
17375 attr
= dwarf2_attr (die
, DW_AT_calling_convention
, cu
);
17377 TYPE_CALLING_CONVENTION (ftype
) = DW_UNSND (attr
);
17378 else if (cu
->producer
&& strstr (cu
->producer
, "IBM XL C for OpenCL"))
17379 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_GDB_IBM_OpenCL
;
17381 TYPE_CALLING_CONVENTION (ftype
) = DW_CC_normal
;
17383 /* Record whether the function returns normally to its caller or not
17384 if the DWARF producer set that information. */
17385 attr
= dwarf2_attr (die
, DW_AT_noreturn
, cu
);
17386 if (attr
&& (DW_UNSND (attr
) != 0))
17387 TYPE_NO_RETURN (ftype
) = 1;
17389 /* We need to add the subroutine type to the die immediately so
17390 we don't infinitely recurse when dealing with parameters
17391 declared as the same subroutine type. */
17392 set_die_type (die
, ftype
, cu
);
17394 if (die
->child
!= NULL
)
17396 struct type
*void_type
= objfile_type (objfile
)->builtin_void
;
17397 struct die_info
*child_die
;
17398 int nparams
, iparams
;
17400 /* Count the number of parameters.
17401 FIXME: GDB currently ignores vararg functions, but knows about
17402 vararg member functions. */
17404 child_die
= die
->child
;
17405 while (child_die
&& child_die
->tag
)
17407 if (child_die
->tag
== DW_TAG_formal_parameter
)
17409 else if (child_die
->tag
== DW_TAG_unspecified_parameters
)
17410 TYPE_VARARGS (ftype
) = 1;
17411 child_die
= sibling_die (child_die
);
17414 /* Allocate storage for parameters and fill them in. */
17415 TYPE_NFIELDS (ftype
) = nparams
;
17416 TYPE_FIELDS (ftype
) = (struct field
*)
17417 TYPE_ZALLOC (ftype
, nparams
* sizeof (struct field
));
17419 /* TYPE_FIELD_TYPE must never be NULL. Pre-fill the array to ensure it
17420 even if we error out during the parameters reading below. */
17421 for (iparams
= 0; iparams
< nparams
; iparams
++)
17422 TYPE_FIELD_TYPE (ftype
, iparams
) = void_type
;
17425 child_die
= die
->child
;
17426 while (child_die
&& child_die
->tag
)
17428 if (child_die
->tag
== DW_TAG_formal_parameter
)
17430 struct type
*arg_type
;
17432 /* DWARF version 2 has no clean way to discern C++
17433 static and non-static member functions. G++ helps
17434 GDB by marking the first parameter for non-static
17435 member functions (which is the this pointer) as
17436 artificial. We pass this information to
17437 dwarf2_add_member_fn via TYPE_FIELD_ARTIFICIAL.
17439 DWARF version 3 added DW_AT_object_pointer, which GCC
17440 4.5 does not yet generate. */
17441 attr
= dwarf2_attr (child_die
, DW_AT_artificial
, cu
);
17443 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = DW_UNSND (attr
);
17445 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
17446 arg_type
= die_type (child_die
, cu
);
17448 /* RealView does not mark THIS as const, which the testsuite
17449 expects. GCC marks THIS as const in method definitions,
17450 but not in the class specifications (GCC PR 43053). */
17451 if (cu
->language
== language_cplus
&& !TYPE_CONST (arg_type
)
17452 && TYPE_FIELD_ARTIFICIAL (ftype
, iparams
))
17455 struct dwarf2_cu
*arg_cu
= cu
;
17456 const char *name
= dwarf2_name (child_die
, cu
);
17458 attr
= dwarf2_attr (die
, DW_AT_object_pointer
, cu
);
17461 /* If the compiler emits this, use it. */
17462 if (follow_die_ref (die
, attr
, &arg_cu
) == child_die
)
17465 else if (name
&& strcmp (name
, "this") == 0)
17466 /* Function definitions will have the argument names. */
17468 else if (name
== NULL
&& iparams
== 0)
17469 /* Declarations may not have the names, so like
17470 elsewhere in GDB, assume an artificial first
17471 argument is "this". */
17475 arg_type
= make_cv_type (1, TYPE_VOLATILE (arg_type
),
17479 TYPE_FIELD_TYPE (ftype
, iparams
) = arg_type
;
17482 child_die
= sibling_die (child_die
);
17489 static struct type
*
17490 read_typedef (struct die_info
*die
, struct dwarf2_cu
*cu
)
17492 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17493 const char *name
= NULL
;
17494 struct type
*this_type
, *target_type
;
17496 name
= dwarf2_full_name (NULL
, die
, cu
);
17497 this_type
= init_type (objfile
, TYPE_CODE_TYPEDEF
, 0, name
);
17498 TYPE_TARGET_STUB (this_type
) = 1;
17499 set_die_type (die
, this_type
, cu
);
17500 target_type
= die_type (die
, cu
);
17501 if (target_type
!= this_type
)
17502 TYPE_TARGET_TYPE (this_type
) = target_type
;
17505 /* Self-referential typedefs are, it seems, not allowed by the DWARF
17506 spec and cause infinite loops in GDB. */
17507 complaint (_("Self-referential DW_TAG_typedef "
17508 "- DIE at %s [in module %s]"),
17509 sect_offset_str (die
->sect_off
), objfile_name (objfile
));
17510 TYPE_TARGET_TYPE (this_type
) = NULL
;
17515 /* Allocate a floating-point type of size BITS and name NAME. Pass NAME_HINT
17516 (which may be different from NAME) to the architecture back-end to allow
17517 it to guess the correct format if necessary. */
17519 static struct type
*
17520 dwarf2_init_float_type (struct objfile
*objfile
, int bits
, const char *name
,
17521 const char *name_hint
)
17523 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17524 const struct floatformat
**format
;
17527 format
= gdbarch_floatformat_for_type (gdbarch
, name_hint
, bits
);
17529 type
= init_float_type (objfile
, bits
, name
, format
);
17531 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17536 /* Allocate an integer type of size BITS and name NAME. */
17538 static struct type
*
17539 dwarf2_init_integer_type (struct dwarf2_cu
*cu
, struct objfile
*objfile
,
17540 int bits
, int unsigned_p
, const char *name
)
17544 /* Versions of Intel's C Compiler generate an integer type called "void"
17545 instead of using DW_TAG_unspecified_type. This has been seen on
17546 at least versions 14, 17, and 18. */
17547 if (bits
== 0 && producer_is_icc (cu
) && name
!= nullptr
17548 && strcmp (name
, "void") == 0)
17549 type
= objfile_type (objfile
)->builtin_void
;
17551 type
= init_integer_type (objfile
, bits
, unsigned_p
, name
);
17556 /* Initialise and return a floating point type of size BITS suitable for
17557 use as a component of a complex number. The NAME_HINT is passed through
17558 when initialising the floating point type and is the name of the complex
17561 As DWARF doesn't currently provide an explicit name for the components
17562 of a complex number, but it can be helpful to have these components
17563 named, we try to select a suitable name based on the size of the
17565 static struct type
*
17566 dwarf2_init_complex_target_type (struct dwarf2_cu
*cu
,
17567 struct objfile
*objfile
,
17568 int bits
, const char *name_hint
)
17570 gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17571 struct type
*tt
= nullptr;
17573 /* Try to find a suitable floating point builtin type of size BITS.
17574 We're going to use the name of this type as the name for the complex
17575 target type that we are about to create. */
17576 switch (cu
->language
)
17578 case language_fortran
:
17582 tt
= builtin_f_type (gdbarch
)->builtin_real
;
17585 tt
= builtin_f_type (gdbarch
)->builtin_real_s8
;
17587 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17589 tt
= builtin_f_type (gdbarch
)->builtin_real_s16
;
17597 tt
= builtin_type (gdbarch
)->builtin_float
;
17600 tt
= builtin_type (gdbarch
)->builtin_double
;
17602 case 96: /* The x86-32 ABI specifies 96-bit long double. */
17604 tt
= builtin_type (gdbarch
)->builtin_long_double
;
17610 /* If the type we found doesn't match the size we were looking for, then
17611 pretend we didn't find a type at all, the complex target type we
17612 create will then be nameless. */
17613 if (tt
!= nullptr && TYPE_LENGTH (tt
) * TARGET_CHAR_BIT
!= bits
)
17616 const char *name
= (tt
== nullptr) ? nullptr : TYPE_NAME (tt
);
17617 return dwarf2_init_float_type (objfile
, bits
, name
, name_hint
);
17620 /* Find a representation of a given base type and install
17621 it in the TYPE field of the die. */
17623 static struct type
*
17624 read_base_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17626 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17628 struct attribute
*attr
;
17629 int encoding
= 0, bits
= 0;
17632 attr
= dwarf2_attr (die
, DW_AT_encoding
, cu
);
17635 encoding
= DW_UNSND (attr
);
17637 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
17640 bits
= DW_UNSND (attr
) * TARGET_CHAR_BIT
;
17642 name
= dwarf2_name (die
, cu
);
17645 complaint (_("DW_AT_name missing from DW_TAG_base_type"));
17650 case DW_ATE_address
:
17651 /* Turn DW_ATE_address into a void * pointer. */
17652 type
= init_type (objfile
, TYPE_CODE_VOID
, TARGET_CHAR_BIT
, NULL
);
17653 type
= init_pointer_type (objfile
, bits
, name
, type
);
17655 case DW_ATE_boolean
:
17656 type
= init_boolean_type (objfile
, bits
, 1, name
);
17658 case DW_ATE_complex_float
:
17659 type
= dwarf2_init_complex_target_type (cu
, objfile
, bits
/ 2, name
);
17660 type
= init_complex_type (objfile
, name
, type
);
17662 case DW_ATE_decimal_float
:
17663 type
= init_decfloat_type (objfile
, bits
, name
);
17666 type
= dwarf2_init_float_type (objfile
, bits
, name
, name
);
17668 case DW_ATE_signed
:
17669 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17671 case DW_ATE_unsigned
:
17672 if (cu
->language
== language_fortran
17674 && startswith (name
, "character("))
17675 type
= init_character_type (objfile
, bits
, 1, name
);
17677 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17679 case DW_ATE_signed_char
:
17680 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17681 || cu
->language
== language_pascal
17682 || cu
->language
== language_fortran
)
17683 type
= init_character_type (objfile
, bits
, 0, name
);
17685 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 0, name
);
17687 case DW_ATE_unsigned_char
:
17688 if (cu
->language
== language_ada
|| cu
->language
== language_m2
17689 || cu
->language
== language_pascal
17690 || cu
->language
== language_fortran
17691 || cu
->language
== language_rust
)
17692 type
= init_character_type (objfile
, bits
, 1, name
);
17694 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17698 gdbarch
*arch
= get_objfile_arch (objfile
);
17701 type
= builtin_type (arch
)->builtin_char16
;
17702 else if (bits
== 32)
17703 type
= builtin_type (arch
)->builtin_char32
;
17706 complaint (_("unsupported DW_ATE_UTF bit size: '%d'"),
17708 type
= dwarf2_init_integer_type (cu
, objfile
, bits
, 1, name
);
17710 return set_die_type (die
, type
, cu
);
17715 complaint (_("unsupported DW_AT_encoding: '%s'"),
17716 dwarf_type_encoding_name (encoding
));
17717 type
= init_type (objfile
, TYPE_CODE_ERROR
, bits
, name
);
17721 if (name
&& strcmp (name
, "char") == 0)
17722 TYPE_NOSIGN (type
) = 1;
17724 maybe_set_alignment (cu
, die
, type
);
17726 return set_die_type (die
, type
, cu
);
17729 /* Parse dwarf attribute if it's a block, reference or constant and put the
17730 resulting value of the attribute into struct bound_prop.
17731 Returns 1 if ATTR could be resolved into PROP, 0 otherwise. */
17734 attr_to_dynamic_prop (const struct attribute
*attr
, struct die_info
*die
,
17735 struct dwarf2_cu
*cu
, struct dynamic_prop
*prop
)
17737 struct dwarf2_property_baton
*baton
;
17738 struct obstack
*obstack
17739 = &cu
->per_cu
->dwarf2_per_objfile
->objfile
->objfile_obstack
;
17741 if (attr
== NULL
|| prop
== NULL
)
17744 if (attr_form_is_block (attr
))
17746 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17747 baton
->referenced_type
= NULL
;
17748 baton
->locexpr
.per_cu
= cu
->per_cu
;
17749 baton
->locexpr
.size
= DW_BLOCK (attr
)->size
;
17750 baton
->locexpr
.data
= DW_BLOCK (attr
)->data
;
17751 prop
->data
.baton
= baton
;
17752 prop
->kind
= PROP_LOCEXPR
;
17753 gdb_assert (prop
->data
.baton
!= NULL
);
17755 else if (attr_form_is_ref (attr
))
17757 struct dwarf2_cu
*target_cu
= cu
;
17758 struct die_info
*target_die
;
17759 struct attribute
*target_attr
;
17761 target_die
= follow_die_ref (die
, attr
, &target_cu
);
17762 target_attr
= dwarf2_attr (target_die
, DW_AT_location
, target_cu
);
17763 if (target_attr
== NULL
)
17764 target_attr
= dwarf2_attr (target_die
, DW_AT_data_member_location
,
17766 if (target_attr
== NULL
)
17769 switch (target_attr
->name
)
17771 case DW_AT_location
:
17772 if (attr_form_is_section_offset (target_attr
))
17774 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17775 baton
->referenced_type
= die_type (target_die
, target_cu
);
17776 fill_in_loclist_baton (cu
, &baton
->loclist
, target_attr
);
17777 prop
->data
.baton
= baton
;
17778 prop
->kind
= PROP_LOCLIST
;
17779 gdb_assert (prop
->data
.baton
!= NULL
);
17781 else if (attr_form_is_block (target_attr
))
17783 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17784 baton
->referenced_type
= die_type (target_die
, target_cu
);
17785 baton
->locexpr
.per_cu
= cu
->per_cu
;
17786 baton
->locexpr
.size
= DW_BLOCK (target_attr
)->size
;
17787 baton
->locexpr
.data
= DW_BLOCK (target_attr
)->data
;
17788 prop
->data
.baton
= baton
;
17789 prop
->kind
= PROP_LOCEXPR
;
17790 gdb_assert (prop
->data
.baton
!= NULL
);
17794 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
17795 "dynamic property");
17799 case DW_AT_data_member_location
:
17803 if (!handle_data_member_location (target_die
, target_cu
,
17807 baton
= XOBNEW (obstack
, struct dwarf2_property_baton
);
17808 baton
->referenced_type
= read_type_die (target_die
->parent
,
17810 baton
->offset_info
.offset
= offset
;
17811 baton
->offset_info
.type
= die_type (target_die
, target_cu
);
17812 prop
->data
.baton
= baton
;
17813 prop
->kind
= PROP_ADDR_OFFSET
;
17818 else if (attr_form_is_constant (attr
))
17820 prop
->data
.const_val
= dwarf2_get_attr_constant_value (attr
, 0);
17821 prop
->kind
= PROP_CONST
;
17825 dwarf2_invalid_attrib_class_complaint (dwarf_form_name (attr
->form
),
17826 dwarf2_name (die
, cu
));
17833 /* Read the given DW_AT_subrange DIE. */
17835 static struct type
*
17836 read_subrange_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
17838 struct type
*base_type
, *orig_base_type
;
17839 struct type
*range_type
;
17840 struct attribute
*attr
;
17841 struct dynamic_prop low
, high
;
17842 int low_default_is_valid
;
17843 int high_bound_is_count
= 0;
17845 ULONGEST negative_mask
;
17847 orig_base_type
= die_type (die
, cu
);
17848 /* If ORIG_BASE_TYPE is a typedef, it will not be TYPE_UNSIGNED,
17849 whereas the real type might be. So, we use ORIG_BASE_TYPE when
17850 creating the range type, but we use the result of check_typedef
17851 when examining properties of the type. */
17852 base_type
= check_typedef (orig_base_type
);
17854 /* The die_type call above may have already set the type for this DIE. */
17855 range_type
= get_die_type (die
, cu
);
17859 low
.kind
= PROP_CONST
;
17860 high
.kind
= PROP_CONST
;
17861 high
.data
.const_val
= 0;
17863 /* Set LOW_DEFAULT_IS_VALID if current language and DWARF version allow
17864 omitting DW_AT_lower_bound. */
17865 switch (cu
->language
)
17868 case language_cplus
:
17869 low
.data
.const_val
= 0;
17870 low_default_is_valid
= 1;
17872 case language_fortran
:
17873 low
.data
.const_val
= 1;
17874 low_default_is_valid
= 1;
17877 case language_objc
:
17878 case language_rust
:
17879 low
.data
.const_val
= 0;
17880 low_default_is_valid
= (cu
->header
.version
>= 4);
17884 case language_pascal
:
17885 low
.data
.const_val
= 1;
17886 low_default_is_valid
= (cu
->header
.version
>= 4);
17889 low
.data
.const_val
= 0;
17890 low_default_is_valid
= 0;
17894 attr
= dwarf2_attr (die
, DW_AT_lower_bound
, cu
);
17896 attr_to_dynamic_prop (attr
, die
, cu
, &low
);
17897 else if (!low_default_is_valid
)
17898 complaint (_("Missing DW_AT_lower_bound "
17899 "- DIE at %s [in module %s]"),
17900 sect_offset_str (die
->sect_off
),
17901 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17903 struct attribute
*attr_ub
, *attr_count
;
17904 attr
= attr_ub
= dwarf2_attr (die
, DW_AT_upper_bound
, cu
);
17905 if (!attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17907 attr
= attr_count
= dwarf2_attr (die
, DW_AT_count
, cu
);
17908 if (attr_to_dynamic_prop (attr
, die
, cu
, &high
))
17910 /* If bounds are constant do the final calculation here. */
17911 if (low
.kind
== PROP_CONST
&& high
.kind
== PROP_CONST
)
17912 high
.data
.const_val
= low
.data
.const_val
+ high
.data
.const_val
- 1;
17914 high_bound_is_count
= 1;
17918 if (attr_ub
!= NULL
)
17919 complaint (_("Unresolved DW_AT_upper_bound "
17920 "- DIE at %s [in module %s]"),
17921 sect_offset_str (die
->sect_off
),
17922 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17923 if (attr_count
!= NULL
)
17924 complaint (_("Unresolved DW_AT_count "
17925 "- DIE at %s [in module %s]"),
17926 sect_offset_str (die
->sect_off
),
17927 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
17932 /* Dwarf-2 specifications explicitly allows to create subrange types
17933 without specifying a base type.
17934 In that case, the base type must be set to the type of
17935 the lower bound, upper bound or count, in that order, if any of these
17936 three attributes references an object that has a type.
17937 If no base type is found, the Dwarf-2 specifications say that
17938 a signed integer type of size equal to the size of an address should
17940 For the following C code: `extern char gdb_int [];'
17941 GCC produces an empty range DIE.
17942 FIXME: muller/2010-05-28: Possible references to object for low bound,
17943 high bound or count are not yet handled by this code. */
17944 if (TYPE_CODE (base_type
) == TYPE_CODE_VOID
)
17946 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
17947 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
17948 int addr_size
= gdbarch_addr_bit (gdbarch
) /8;
17949 struct type
*int_type
= objfile_type (objfile
)->builtin_int
;
17951 /* Test "int", "long int", and "long long int" objfile types,
17952 and select the first one having a size above or equal to the
17953 architecture address size. */
17954 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17955 base_type
= int_type
;
17958 int_type
= objfile_type (objfile
)->builtin_long
;
17959 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17960 base_type
= int_type
;
17963 int_type
= objfile_type (objfile
)->builtin_long_long
;
17964 if (int_type
&& TYPE_LENGTH (int_type
) >= addr_size
)
17965 base_type
= int_type
;
17970 /* Normally, the DWARF producers are expected to use a signed
17971 constant form (Eg. DW_FORM_sdata) to express negative bounds.
17972 But this is unfortunately not always the case, as witnessed
17973 with GCC, for instance, where the ambiguous DW_FORM_dataN form
17974 is used instead. To work around that ambiguity, we treat
17975 the bounds as signed, and thus sign-extend their values, when
17976 the base type is signed. */
17978 -((ULONGEST
) 1 << (TYPE_LENGTH (base_type
) * TARGET_CHAR_BIT
- 1));
17979 if (low
.kind
== PROP_CONST
17980 && !TYPE_UNSIGNED (base_type
) && (low
.data
.const_val
& negative_mask
))
17981 low
.data
.const_val
|= negative_mask
;
17982 if (high
.kind
== PROP_CONST
17983 && !TYPE_UNSIGNED (base_type
) && (high
.data
.const_val
& negative_mask
))
17984 high
.data
.const_val
|= negative_mask
;
17986 range_type
= create_range_type (NULL
, orig_base_type
, &low
, &high
);
17988 if (high_bound_is_count
)
17989 TYPE_RANGE_DATA (range_type
)->flag_upper_bound_is_count
= 1;
17991 /* Ada expects an empty array on no boundary attributes. */
17992 if (attr
== NULL
&& cu
->language
!= language_ada
)
17993 TYPE_HIGH_BOUND_KIND (range_type
) = PROP_UNDEFINED
;
17995 name
= dwarf2_name (die
, cu
);
17997 TYPE_NAME (range_type
) = name
;
17999 attr
= dwarf2_attr (die
, DW_AT_byte_size
, cu
);
18001 TYPE_LENGTH (range_type
) = DW_UNSND (attr
);
18003 maybe_set_alignment (cu
, die
, range_type
);
18005 set_die_type (die
, range_type
, cu
);
18007 /* set_die_type should be already done. */
18008 set_descriptive_type (range_type
, die
, cu
);
18013 static struct type
*
18014 read_unspecified_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
18018 type
= init_type (cu
->per_cu
->dwarf2_per_objfile
->objfile
, TYPE_CODE_VOID
,0,
18020 TYPE_NAME (type
) = dwarf2_name (die
, cu
);
18022 /* In Ada, an unspecified type is typically used when the description
18023 of the type is defered to a different unit. When encountering
18024 such a type, we treat it as a stub, and try to resolve it later on,
18026 if (cu
->language
== language_ada
)
18027 TYPE_STUB (type
) = 1;
18029 return set_die_type (die
, type
, cu
);
18032 /* Read a single die and all its descendents. Set the die's sibling
18033 field to NULL; set other fields in the die correctly, and set all
18034 of the descendents' fields correctly. Set *NEW_INFO_PTR to the
18035 location of the info_ptr after reading all of those dies. PARENT
18036 is the parent of the die in question. */
18038 static struct die_info
*
18039 read_die_and_children (const struct die_reader_specs
*reader
,
18040 const gdb_byte
*info_ptr
,
18041 const gdb_byte
**new_info_ptr
,
18042 struct die_info
*parent
)
18044 struct die_info
*die
;
18045 const gdb_byte
*cur_ptr
;
18048 cur_ptr
= read_full_die_1 (reader
, &die
, info_ptr
, &has_children
, 0);
18051 *new_info_ptr
= cur_ptr
;
18054 store_in_ref_table (die
, reader
->cu
);
18057 die
->child
= read_die_and_siblings_1 (reader
, cur_ptr
, new_info_ptr
, die
);
18061 *new_info_ptr
= cur_ptr
;
18064 die
->sibling
= NULL
;
18065 die
->parent
= parent
;
18069 /* Read a die, all of its descendents, and all of its siblings; set
18070 all of the fields of all of the dies correctly. Arguments are as
18071 in read_die_and_children. */
18073 static struct die_info
*
18074 read_die_and_siblings_1 (const struct die_reader_specs
*reader
,
18075 const gdb_byte
*info_ptr
,
18076 const gdb_byte
**new_info_ptr
,
18077 struct die_info
*parent
)
18079 struct die_info
*first_die
, *last_sibling
;
18080 const gdb_byte
*cur_ptr
;
18082 cur_ptr
= info_ptr
;
18083 first_die
= last_sibling
= NULL
;
18087 struct die_info
*die
18088 = read_die_and_children (reader
, cur_ptr
, &cur_ptr
, parent
);
18092 *new_info_ptr
= cur_ptr
;
18099 last_sibling
->sibling
= die
;
18101 last_sibling
= die
;
18105 /* Read a die, all of its descendents, and all of its siblings; set
18106 all of the fields of all of the dies correctly. Arguments are as
18107 in read_die_and_children.
18108 This the main entry point for reading a DIE and all its children. */
18110 static struct die_info
*
18111 read_die_and_siblings (const struct die_reader_specs
*reader
,
18112 const gdb_byte
*info_ptr
,
18113 const gdb_byte
**new_info_ptr
,
18114 struct die_info
*parent
)
18116 struct die_info
*die
= read_die_and_siblings_1 (reader
, info_ptr
,
18117 new_info_ptr
, parent
);
18119 if (dwarf_die_debug
)
18121 fprintf_unfiltered (gdb_stdlog
,
18122 "Read die from %s@0x%x of %s:\n",
18123 get_section_name (reader
->die_section
),
18124 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18125 bfd_get_filename (reader
->abfd
));
18126 dump_die (die
, dwarf_die_debug
);
18132 /* Read a die and all its attributes, leave space for NUM_EXTRA_ATTRS
18134 The caller is responsible for filling in the extra attributes
18135 and updating (*DIEP)->num_attrs.
18136 Set DIEP to point to a newly allocated die with its information,
18137 except for its child, sibling, and parent fields.
18138 Set HAS_CHILDREN to tell whether the die has children or not. */
18140 static const gdb_byte
*
18141 read_full_die_1 (const struct die_reader_specs
*reader
,
18142 struct die_info
**diep
, const gdb_byte
*info_ptr
,
18143 int *has_children
, int num_extra_attrs
)
18145 unsigned int abbrev_number
, bytes_read
, i
;
18146 struct abbrev_info
*abbrev
;
18147 struct die_info
*die
;
18148 struct dwarf2_cu
*cu
= reader
->cu
;
18149 bfd
*abfd
= reader
->abfd
;
18151 sect_offset sect_off
= (sect_offset
) (info_ptr
- reader
->buffer
);
18152 abbrev_number
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
18153 info_ptr
+= bytes_read
;
18154 if (!abbrev_number
)
18161 abbrev
= reader
->abbrev_table
->lookup_abbrev (abbrev_number
);
18163 error (_("Dwarf Error: could not find abbrev number %d [in module %s]"),
18165 bfd_get_filename (abfd
));
18167 die
= dwarf_alloc_die (cu
, abbrev
->num_attrs
+ num_extra_attrs
);
18168 die
->sect_off
= sect_off
;
18169 die
->tag
= abbrev
->tag
;
18170 die
->abbrev
= abbrev_number
;
18172 /* Make the result usable.
18173 The caller needs to update num_attrs after adding the extra
18175 die
->num_attrs
= abbrev
->num_attrs
;
18177 for (i
= 0; i
< abbrev
->num_attrs
; ++i
)
18178 info_ptr
= read_attribute (reader
, &die
->attrs
[i
], &abbrev
->attrs
[i
],
18182 *has_children
= abbrev
->has_children
;
18186 /* Read a die and all its attributes.
18187 Set DIEP to point to a newly allocated die with its information,
18188 except for its child, sibling, and parent fields.
18189 Set HAS_CHILDREN to tell whether the die has children or not. */
18191 static const gdb_byte
*
18192 read_full_die (const struct die_reader_specs
*reader
,
18193 struct die_info
**diep
, const gdb_byte
*info_ptr
,
18196 const gdb_byte
*result
;
18198 result
= read_full_die_1 (reader
, diep
, info_ptr
, has_children
, 0);
18200 if (dwarf_die_debug
)
18202 fprintf_unfiltered (gdb_stdlog
,
18203 "Read die from %s@0x%x of %s:\n",
18204 get_section_name (reader
->die_section
),
18205 (unsigned) (info_ptr
- reader
->die_section
->buffer
),
18206 bfd_get_filename (reader
->abfd
));
18207 dump_die (*diep
, dwarf_die_debug
);
18213 /* Abbreviation tables.
18215 In DWARF version 2, the description of the debugging information is
18216 stored in a separate .debug_abbrev section. Before we read any
18217 dies from a section we read in all abbreviations and install them
18218 in a hash table. */
18220 /* Allocate space for a struct abbrev_info object in ABBREV_TABLE. */
18222 struct abbrev_info
*
18223 abbrev_table::alloc_abbrev ()
18225 struct abbrev_info
*abbrev
;
18227 abbrev
= XOBNEW (&abbrev_obstack
, struct abbrev_info
);
18228 memset (abbrev
, 0, sizeof (struct abbrev_info
));
18233 /* Add an abbreviation to the table. */
18236 abbrev_table::add_abbrev (unsigned int abbrev_number
,
18237 struct abbrev_info
*abbrev
)
18239 unsigned int hash_number
;
18241 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18242 abbrev
->next
= m_abbrevs
[hash_number
];
18243 m_abbrevs
[hash_number
] = abbrev
;
18246 /* Look up an abbrev in the table.
18247 Returns NULL if the abbrev is not found. */
18249 struct abbrev_info
*
18250 abbrev_table::lookup_abbrev (unsigned int abbrev_number
)
18252 unsigned int hash_number
;
18253 struct abbrev_info
*abbrev
;
18255 hash_number
= abbrev_number
% ABBREV_HASH_SIZE
;
18256 abbrev
= m_abbrevs
[hash_number
];
18260 if (abbrev
->number
== abbrev_number
)
18262 abbrev
= abbrev
->next
;
18267 /* Read in an abbrev table. */
18269 static abbrev_table_up
18270 abbrev_table_read_table (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
18271 struct dwarf2_section_info
*section
,
18272 sect_offset sect_off
)
18274 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18275 bfd
*abfd
= get_section_bfd_owner (section
);
18276 const gdb_byte
*abbrev_ptr
;
18277 struct abbrev_info
*cur_abbrev
;
18278 unsigned int abbrev_number
, bytes_read
, abbrev_name
;
18279 unsigned int abbrev_form
;
18280 struct attr_abbrev
*cur_attrs
;
18281 unsigned int allocated_attrs
;
18283 abbrev_table_up
abbrev_table (new struct abbrev_table (sect_off
));
18285 dwarf2_read_section (objfile
, section
);
18286 abbrev_ptr
= section
->buffer
+ to_underlying (sect_off
);
18287 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18288 abbrev_ptr
+= bytes_read
;
18290 allocated_attrs
= ATTR_ALLOC_CHUNK
;
18291 cur_attrs
= XNEWVEC (struct attr_abbrev
, allocated_attrs
);
18293 /* Loop until we reach an abbrev number of 0. */
18294 while (abbrev_number
)
18296 cur_abbrev
= abbrev_table
->alloc_abbrev ();
18298 /* read in abbrev header */
18299 cur_abbrev
->number
= abbrev_number
;
18301 = (enum dwarf_tag
) read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18302 abbrev_ptr
+= bytes_read
;
18303 cur_abbrev
->has_children
= read_1_byte (abfd
, abbrev_ptr
);
18306 /* now read in declarations */
18309 LONGEST implicit_const
;
18311 abbrev_name
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18312 abbrev_ptr
+= bytes_read
;
18313 abbrev_form
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18314 abbrev_ptr
+= bytes_read
;
18315 if (abbrev_form
== DW_FORM_implicit_const
)
18317 implicit_const
= read_signed_leb128 (abfd
, abbrev_ptr
,
18319 abbrev_ptr
+= bytes_read
;
18323 /* Initialize it due to a false compiler warning. */
18324 implicit_const
= -1;
18327 if (abbrev_name
== 0)
18330 if (cur_abbrev
->num_attrs
== allocated_attrs
)
18332 allocated_attrs
+= ATTR_ALLOC_CHUNK
;
18334 = XRESIZEVEC (struct attr_abbrev
, cur_attrs
, allocated_attrs
);
18337 cur_attrs
[cur_abbrev
->num_attrs
].name
18338 = (enum dwarf_attribute
) abbrev_name
;
18339 cur_attrs
[cur_abbrev
->num_attrs
].form
18340 = (enum dwarf_form
) abbrev_form
;
18341 cur_attrs
[cur_abbrev
->num_attrs
].implicit_const
= implicit_const
;
18342 ++cur_abbrev
->num_attrs
;
18345 cur_abbrev
->attrs
=
18346 XOBNEWVEC (&abbrev_table
->abbrev_obstack
, struct attr_abbrev
,
18347 cur_abbrev
->num_attrs
);
18348 memcpy (cur_abbrev
->attrs
, cur_attrs
,
18349 cur_abbrev
->num_attrs
* sizeof (struct attr_abbrev
));
18351 abbrev_table
->add_abbrev (abbrev_number
, cur_abbrev
);
18353 /* Get next abbreviation.
18354 Under Irix6 the abbreviations for a compilation unit are not
18355 always properly terminated with an abbrev number of 0.
18356 Exit loop if we encounter an abbreviation which we have
18357 already read (which means we are about to read the abbreviations
18358 for the next compile unit) or if the end of the abbreviation
18359 table is reached. */
18360 if ((unsigned int) (abbrev_ptr
- section
->buffer
) >= section
->size
)
18362 abbrev_number
= read_unsigned_leb128 (abfd
, abbrev_ptr
, &bytes_read
);
18363 abbrev_ptr
+= bytes_read
;
18364 if (abbrev_table
->lookup_abbrev (abbrev_number
) != NULL
)
18369 return abbrev_table
;
18372 /* Returns nonzero if TAG represents a type that we might generate a partial
18376 is_type_tag_for_partial (int tag
)
18381 /* Some types that would be reasonable to generate partial symbols for,
18382 that we don't at present. */
18383 case DW_TAG_array_type
:
18384 case DW_TAG_file_type
:
18385 case DW_TAG_ptr_to_member_type
:
18386 case DW_TAG_set_type
:
18387 case DW_TAG_string_type
:
18388 case DW_TAG_subroutine_type
:
18390 case DW_TAG_base_type
:
18391 case DW_TAG_class_type
:
18392 case DW_TAG_interface_type
:
18393 case DW_TAG_enumeration_type
:
18394 case DW_TAG_structure_type
:
18395 case DW_TAG_subrange_type
:
18396 case DW_TAG_typedef
:
18397 case DW_TAG_union_type
:
18404 /* Load all DIEs that are interesting for partial symbols into memory. */
18406 static struct partial_die_info
*
18407 load_partial_dies (const struct die_reader_specs
*reader
,
18408 const gdb_byte
*info_ptr
, int building_psymtab
)
18410 struct dwarf2_cu
*cu
= reader
->cu
;
18411 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
18412 struct partial_die_info
*parent_die
, *last_die
, *first_die
= NULL
;
18413 unsigned int bytes_read
;
18414 unsigned int load_all
= 0;
18415 int nesting_level
= 1;
18420 gdb_assert (cu
->per_cu
!= NULL
);
18421 if (cu
->per_cu
->load_all_dies
)
18425 = htab_create_alloc_ex (cu
->header
.length
/ 12,
18429 &cu
->comp_unit_obstack
,
18430 hashtab_obstack_allocate
,
18431 dummy_obstack_deallocate
);
18435 abbrev_info
*abbrev
= peek_die_abbrev (*reader
, info_ptr
, &bytes_read
);
18437 /* A NULL abbrev means the end of a series of children. */
18438 if (abbrev
== NULL
)
18440 if (--nesting_level
== 0)
18443 info_ptr
+= bytes_read
;
18444 last_die
= parent_die
;
18445 parent_die
= parent_die
->die_parent
;
18449 /* Check for template arguments. We never save these; if
18450 they're seen, we just mark the parent, and go on our way. */
18451 if (parent_die
!= NULL
18452 && cu
->language
== language_cplus
18453 && (abbrev
->tag
== DW_TAG_template_type_param
18454 || abbrev
->tag
== DW_TAG_template_value_param
))
18456 parent_die
->has_template_arguments
= 1;
18460 /* We don't need a partial DIE for the template argument. */
18461 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18466 /* We only recurse into c++ subprograms looking for template arguments.
18467 Skip their other children. */
18469 && cu
->language
== language_cplus
18470 && parent_die
!= NULL
18471 && parent_die
->tag
== DW_TAG_subprogram
)
18473 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18477 /* Check whether this DIE is interesting enough to save. Normally
18478 we would not be interested in members here, but there may be
18479 later variables referencing them via DW_AT_specification (for
18480 static members). */
18482 && !is_type_tag_for_partial (abbrev
->tag
)
18483 && abbrev
->tag
!= DW_TAG_constant
18484 && abbrev
->tag
!= DW_TAG_enumerator
18485 && abbrev
->tag
!= DW_TAG_subprogram
18486 && abbrev
->tag
!= DW_TAG_inlined_subroutine
18487 && abbrev
->tag
!= DW_TAG_lexical_block
18488 && abbrev
->tag
!= DW_TAG_variable
18489 && abbrev
->tag
!= DW_TAG_namespace
18490 && abbrev
->tag
!= DW_TAG_module
18491 && abbrev
->tag
!= DW_TAG_member
18492 && abbrev
->tag
!= DW_TAG_imported_unit
18493 && abbrev
->tag
!= DW_TAG_imported_declaration
)
18495 /* Otherwise we skip to the next sibling, if any. */
18496 info_ptr
= skip_one_die (reader
, info_ptr
+ bytes_read
, abbrev
);
18500 struct partial_die_info
pdi ((sect_offset
) (info_ptr
- reader
->buffer
),
18503 info_ptr
= pdi
.read (reader
, *abbrev
, info_ptr
+ bytes_read
);
18505 /* This two-pass algorithm for processing partial symbols has a
18506 high cost in cache pressure. Thus, handle some simple cases
18507 here which cover the majority of C partial symbols. DIEs
18508 which neither have specification tags in them, nor could have
18509 specification tags elsewhere pointing at them, can simply be
18510 processed and discarded.
18512 This segment is also optional; scan_partial_symbols and
18513 add_partial_symbol will handle these DIEs if we chain
18514 them in normally. When compilers which do not emit large
18515 quantities of duplicate debug information are more common,
18516 this code can probably be removed. */
18518 /* Any complete simple types at the top level (pretty much all
18519 of them, for a language without namespaces), can be processed
18521 if (parent_die
== NULL
18522 && pdi
.has_specification
== 0
18523 && pdi
.is_declaration
== 0
18524 && ((pdi
.tag
== DW_TAG_typedef
&& !pdi
.has_children
)
18525 || pdi
.tag
== DW_TAG_base_type
18526 || pdi
.tag
== DW_TAG_subrange_type
))
18528 if (building_psymtab
&& pdi
.name
!= NULL
)
18529 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18530 VAR_DOMAIN
, LOC_TYPEDEF
, -1,
18531 psymbol_placement::STATIC
,
18532 0, cu
->language
, objfile
);
18533 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18537 /* The exception for DW_TAG_typedef with has_children above is
18538 a workaround of GCC PR debug/47510. In the case of this complaint
18539 type_name_or_error will error on such types later.
18541 GDB skipped children of DW_TAG_typedef by the shortcut above and then
18542 it could not find the child DIEs referenced later, this is checked
18543 above. In correct DWARF DW_TAG_typedef should have no children. */
18545 if (pdi
.tag
== DW_TAG_typedef
&& pdi
.has_children
)
18546 complaint (_("DW_TAG_typedef has childen - GCC PR debug/47510 bug "
18547 "- DIE at %s [in module %s]"),
18548 sect_offset_str (pdi
.sect_off
), objfile_name (objfile
));
18550 /* If we're at the second level, and we're an enumerator, and
18551 our parent has no specification (meaning possibly lives in a
18552 namespace elsewhere), then we can add the partial symbol now
18553 instead of queueing it. */
18554 if (pdi
.tag
== DW_TAG_enumerator
18555 && parent_die
!= NULL
18556 && parent_die
->die_parent
== NULL
18557 && parent_die
->tag
== DW_TAG_enumeration_type
18558 && parent_die
->has_specification
== 0)
18560 if (pdi
.name
== NULL
)
18561 complaint (_("malformed enumerator DIE ignored"));
18562 else if (building_psymtab
)
18563 add_psymbol_to_list (pdi
.name
, strlen (pdi
.name
), 0,
18564 VAR_DOMAIN
, LOC_CONST
, -1,
18565 cu
->language
== language_cplus
18566 ? psymbol_placement::GLOBAL
18567 : psymbol_placement::STATIC
,
18568 0, cu
->language
, objfile
);
18570 info_ptr
= locate_pdi_sibling (reader
, &pdi
, info_ptr
);
18574 struct partial_die_info
*part_die
18575 = new (&cu
->comp_unit_obstack
) partial_die_info (pdi
);
18577 /* We'll save this DIE so link it in. */
18578 part_die
->die_parent
= parent_die
;
18579 part_die
->die_sibling
= NULL
;
18580 part_die
->die_child
= NULL
;
18582 if (last_die
&& last_die
== parent_die
)
18583 last_die
->die_child
= part_die
;
18585 last_die
->die_sibling
= part_die
;
18587 last_die
= part_die
;
18589 if (first_die
== NULL
)
18590 first_die
= part_die
;
18592 /* Maybe add the DIE to the hash table. Not all DIEs that we
18593 find interesting need to be in the hash table, because we
18594 also have the parent/sibling/child chains; only those that we
18595 might refer to by offset later during partial symbol reading.
18597 For now this means things that might have be the target of a
18598 DW_AT_specification, DW_AT_abstract_origin, or
18599 DW_AT_extension. DW_AT_extension will refer only to
18600 namespaces; DW_AT_abstract_origin refers to functions (and
18601 many things under the function DIE, but we do not recurse
18602 into function DIEs during partial symbol reading) and
18603 possibly variables as well; DW_AT_specification refers to
18604 declarations. Declarations ought to have the DW_AT_declaration
18605 flag. It happens that GCC forgets to put it in sometimes, but
18606 only for functions, not for types.
18608 Adding more things than necessary to the hash table is harmless
18609 except for the performance cost. Adding too few will result in
18610 wasted time in find_partial_die, when we reread the compilation
18611 unit with load_all_dies set. */
18614 || abbrev
->tag
== DW_TAG_constant
18615 || abbrev
->tag
== DW_TAG_subprogram
18616 || abbrev
->tag
== DW_TAG_variable
18617 || abbrev
->tag
== DW_TAG_namespace
18618 || part_die
->is_declaration
)
18622 slot
= htab_find_slot_with_hash (cu
->partial_dies
, part_die
,
18623 to_underlying (part_die
->sect_off
),
18628 /* For some DIEs we want to follow their children (if any). For C
18629 we have no reason to follow the children of structures; for other
18630 languages we have to, so that we can get at method physnames
18631 to infer fully qualified class names, for DW_AT_specification,
18632 and for C++ template arguments. For C++, we also look one level
18633 inside functions to find template arguments (if the name of the
18634 function does not already contain the template arguments).
18636 For Ada, we need to scan the children of subprograms and lexical
18637 blocks as well because Ada allows the definition of nested
18638 entities that could be interesting for the debugger, such as
18639 nested subprograms for instance. */
18640 if (last_die
->has_children
18642 || last_die
->tag
== DW_TAG_namespace
18643 || last_die
->tag
== DW_TAG_module
18644 || last_die
->tag
== DW_TAG_enumeration_type
18645 || (cu
->language
== language_cplus
18646 && last_die
->tag
== DW_TAG_subprogram
18647 && (last_die
->name
== NULL
18648 || strchr (last_die
->name
, '<') == NULL
))
18649 || (cu
->language
!= language_c
18650 && (last_die
->tag
== DW_TAG_class_type
18651 || last_die
->tag
== DW_TAG_interface_type
18652 || last_die
->tag
== DW_TAG_structure_type
18653 || last_die
->tag
== DW_TAG_union_type
))
18654 || (cu
->language
== language_ada
18655 && (last_die
->tag
== DW_TAG_subprogram
18656 || last_die
->tag
== DW_TAG_lexical_block
))))
18659 parent_die
= last_die
;
18663 /* Otherwise we skip to the next sibling, if any. */
18664 info_ptr
= locate_pdi_sibling (reader
, last_die
, info_ptr
);
18666 /* Back to the top, do it again. */
18670 partial_die_info::partial_die_info (sect_offset sect_off_
,
18671 struct abbrev_info
*abbrev
)
18672 : partial_die_info (sect_off_
, abbrev
->tag
, abbrev
->has_children
)
18676 /* Read a minimal amount of information into the minimal die structure.
18677 INFO_PTR should point just after the initial uleb128 of a DIE. */
18680 partial_die_info::read (const struct die_reader_specs
*reader
,
18681 const struct abbrev_info
&abbrev
, const gdb_byte
*info_ptr
)
18683 struct dwarf2_cu
*cu
= reader
->cu
;
18684 struct dwarf2_per_objfile
*dwarf2_per_objfile
18685 = cu
->per_cu
->dwarf2_per_objfile
;
18687 int has_low_pc_attr
= 0;
18688 int has_high_pc_attr
= 0;
18689 int high_pc_relative
= 0;
18691 for (i
= 0; i
< abbrev
.num_attrs
; ++i
)
18693 struct attribute attr
;
18695 info_ptr
= read_attribute (reader
, &attr
, &abbrev
.attrs
[i
], info_ptr
);
18697 /* Store the data if it is of an attribute we want to keep in a
18698 partial symbol table. */
18704 case DW_TAG_compile_unit
:
18705 case DW_TAG_partial_unit
:
18706 case DW_TAG_type_unit
:
18707 /* Compilation units have a DW_AT_name that is a filename, not
18708 a source language identifier. */
18709 case DW_TAG_enumeration_type
:
18710 case DW_TAG_enumerator
:
18711 /* These tags always have simple identifiers already; no need
18712 to canonicalize them. */
18713 name
= DW_STRING (&attr
);
18717 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18720 = dwarf2_canonicalize_name (DW_STRING (&attr
), cu
,
18721 &objfile
->per_bfd
->storage_obstack
);
18726 case DW_AT_linkage_name
:
18727 case DW_AT_MIPS_linkage_name
:
18728 /* Note that both forms of linkage name might appear. We
18729 assume they will be the same, and we only store the last
18731 if (cu
->language
== language_ada
)
18732 name
= DW_STRING (&attr
);
18733 linkage_name
= DW_STRING (&attr
);
18736 has_low_pc_attr
= 1;
18737 lowpc
= attr_value_as_address (&attr
);
18739 case DW_AT_high_pc
:
18740 has_high_pc_attr
= 1;
18741 highpc
= attr_value_as_address (&attr
);
18742 if (cu
->header
.version
>= 4 && attr_form_is_constant (&attr
))
18743 high_pc_relative
= 1;
18745 case DW_AT_location
:
18746 /* Support the .debug_loc offsets. */
18747 if (attr_form_is_block (&attr
))
18749 d
.locdesc
= DW_BLOCK (&attr
);
18751 else if (attr_form_is_section_offset (&attr
))
18753 dwarf2_complex_location_expr_complaint ();
18757 dwarf2_invalid_attrib_class_complaint ("DW_AT_location",
18758 "partial symbol information");
18761 case DW_AT_external
:
18762 is_external
= DW_UNSND (&attr
);
18764 case DW_AT_declaration
:
18765 is_declaration
= DW_UNSND (&attr
);
18770 case DW_AT_abstract_origin
:
18771 case DW_AT_specification
:
18772 case DW_AT_extension
:
18773 has_specification
= 1;
18774 spec_offset
= dwarf2_get_ref_die_offset (&attr
);
18775 spec_is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18776 || cu
->per_cu
->is_dwz
);
18778 case DW_AT_sibling
:
18779 /* Ignore absolute siblings, they might point outside of
18780 the current compile unit. */
18781 if (attr
.form
== DW_FORM_ref_addr
)
18782 complaint (_("ignoring absolute DW_AT_sibling"));
18785 const gdb_byte
*buffer
= reader
->buffer
;
18786 sect_offset off
= dwarf2_get_ref_die_offset (&attr
);
18787 const gdb_byte
*sibling_ptr
= buffer
+ to_underlying (off
);
18789 if (sibling_ptr
< info_ptr
)
18790 complaint (_("DW_AT_sibling points backwards"));
18791 else if (sibling_ptr
> reader
->buffer_end
)
18792 dwarf2_section_buffer_overflow_complaint (reader
->die_section
);
18794 sibling
= sibling_ptr
;
18797 case DW_AT_byte_size
:
18800 case DW_AT_const_value
:
18801 has_const_value
= 1;
18803 case DW_AT_calling_convention
:
18804 /* DWARF doesn't provide a way to identify a program's source-level
18805 entry point. DW_AT_calling_convention attributes are only meant
18806 to describe functions' calling conventions.
18808 However, because it's a necessary piece of information in
18809 Fortran, and before DWARF 4 DW_CC_program was the only
18810 piece of debugging information whose definition refers to
18811 a 'main program' at all, several compilers marked Fortran
18812 main programs with DW_CC_program --- even when those
18813 functions use the standard calling conventions.
18815 Although DWARF now specifies a way to provide this
18816 information, we support this practice for backward
18818 if (DW_UNSND (&attr
) == DW_CC_program
18819 && cu
->language
== language_fortran
)
18820 main_subprogram
= 1;
18823 if (DW_UNSND (&attr
) == DW_INL_inlined
18824 || DW_UNSND (&attr
) == DW_INL_declared_inlined
)
18825 may_be_inlined
= 1;
18829 if (tag
== DW_TAG_imported_unit
)
18831 d
.sect_off
= dwarf2_get_ref_die_offset (&attr
);
18832 is_dwz
= (attr
.form
== DW_FORM_GNU_ref_alt
18833 || cu
->per_cu
->is_dwz
);
18837 case DW_AT_main_subprogram
:
18838 main_subprogram
= DW_UNSND (&attr
);
18843 /* It would be nice to reuse dwarf2_get_pc_bounds here,
18844 but that requires a full DIE, so instead we just
18846 int need_ranges_base
= tag
!= DW_TAG_compile_unit
;
18847 unsigned int ranges_offset
= (DW_UNSND (&attr
)
18848 + (need_ranges_base
18852 /* Value of the DW_AT_ranges attribute is the offset in the
18853 .debug_ranges section. */
18854 if (dwarf2_ranges_read (ranges_offset
, &lowpc
, &highpc
, cu
,
18865 if (high_pc_relative
)
18868 if (has_low_pc_attr
&& has_high_pc_attr
)
18870 /* When using the GNU linker, .gnu.linkonce. sections are used to
18871 eliminate duplicate copies of functions and vtables and such.
18872 The linker will arbitrarily choose one and discard the others.
18873 The AT_*_pc values for such functions refer to local labels in
18874 these sections. If the section from that file was discarded, the
18875 labels are not in the output, so the relocs get a value of 0.
18876 If this is a discarded function, mark the pc bounds as invalid,
18877 so that GDB will ignore it. */
18878 if (lowpc
== 0 && !dwarf2_per_objfile
->has_section_at_zero
)
18880 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18881 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18883 complaint (_("DW_AT_low_pc %s is zero "
18884 "for DIE at %s [in module %s]"),
18885 paddress (gdbarch
, lowpc
),
18886 sect_offset_str (sect_off
),
18887 objfile_name (objfile
));
18889 /* dwarf2_get_pc_bounds has also the strict low < high requirement. */
18890 else if (lowpc
>= highpc
)
18892 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18893 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
18895 complaint (_("DW_AT_low_pc %s is not < DW_AT_high_pc %s "
18896 "for DIE at %s [in module %s]"),
18897 paddress (gdbarch
, lowpc
),
18898 paddress (gdbarch
, highpc
),
18899 sect_offset_str (sect_off
),
18900 objfile_name (objfile
));
18909 /* Find a cached partial DIE at OFFSET in CU. */
18911 struct partial_die_info
*
18912 dwarf2_cu::find_partial_die (sect_offset sect_off
)
18914 struct partial_die_info
*lookup_die
= NULL
;
18915 struct partial_die_info
part_die (sect_off
);
18917 lookup_die
= ((struct partial_die_info
*)
18918 htab_find_with_hash (partial_dies
, &part_die
,
18919 to_underlying (sect_off
)));
18924 /* Find a partial DIE at OFFSET, which may or may not be in CU,
18925 except in the case of .debug_types DIEs which do not reference
18926 outside their CU (they do however referencing other types via
18927 DW_FORM_ref_sig8). */
18929 static const struct cu_partial_die_info
18930 find_partial_die (sect_offset sect_off
, int offset_in_dwz
, struct dwarf2_cu
*cu
)
18932 struct dwarf2_per_objfile
*dwarf2_per_objfile
18933 = cu
->per_cu
->dwarf2_per_objfile
;
18934 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
18935 struct dwarf2_per_cu_data
*per_cu
= NULL
;
18936 struct partial_die_info
*pd
= NULL
;
18938 if (offset_in_dwz
== cu
->per_cu
->is_dwz
18939 && offset_in_cu_p (&cu
->header
, sect_off
))
18941 pd
= cu
->find_partial_die (sect_off
);
18944 /* We missed recording what we needed.
18945 Load all dies and try again. */
18946 per_cu
= cu
->per_cu
;
18950 /* TUs don't reference other CUs/TUs (except via type signatures). */
18951 if (cu
->per_cu
->is_debug_types
)
18953 error (_("Dwarf Error: Type Unit at offset %s contains"
18954 " external reference to offset %s [in module %s].\n"),
18955 sect_offset_str (cu
->header
.sect_off
), sect_offset_str (sect_off
),
18956 bfd_get_filename (objfile
->obfd
));
18958 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
18959 dwarf2_per_objfile
);
18961 if (per_cu
->cu
== NULL
|| per_cu
->cu
->partial_dies
== NULL
)
18962 load_partial_comp_unit (per_cu
);
18964 per_cu
->cu
->last_used
= 0;
18965 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18968 /* If we didn't find it, and not all dies have been loaded,
18969 load them all and try again. */
18971 if (pd
== NULL
&& per_cu
->load_all_dies
== 0)
18973 per_cu
->load_all_dies
= 1;
18975 /* This is nasty. When we reread the DIEs, somewhere up the call chain
18976 THIS_CU->cu may already be in use. So we can't just free it and
18977 replace its DIEs with the ones we read in. Instead, we leave those
18978 DIEs alone (which can still be in use, e.g. in scan_partial_symbols),
18979 and clobber THIS_CU->cu->partial_dies with the hash table for the new
18981 load_partial_comp_unit (per_cu
);
18983 pd
= per_cu
->cu
->find_partial_die (sect_off
);
18987 internal_error (__FILE__
, __LINE__
,
18988 _("could not find partial DIE %s "
18989 "in cache [from module %s]\n"),
18990 sect_offset_str (sect_off
), bfd_get_filename (objfile
->obfd
));
18991 return { per_cu
->cu
, pd
};
18994 /* See if we can figure out if the class lives in a namespace. We do
18995 this by looking for a member function; its demangled name will
18996 contain namespace info, if there is any. */
18999 guess_partial_die_structure_name (struct partial_die_info
*struct_pdi
,
19000 struct dwarf2_cu
*cu
)
19002 /* NOTE: carlton/2003-10-07: Getting the info this way changes
19003 what template types look like, because the demangler
19004 frequently doesn't give the same name as the debug info. We
19005 could fix this by only using the demangled name to get the
19006 prefix (but see comment in read_structure_type). */
19008 struct partial_die_info
*real_pdi
;
19009 struct partial_die_info
*child_pdi
;
19011 /* If this DIE (this DIE's specification, if any) has a parent, then
19012 we should not do this. We'll prepend the parent's fully qualified
19013 name when we create the partial symbol. */
19015 real_pdi
= struct_pdi
;
19016 while (real_pdi
->has_specification
)
19018 auto res
= find_partial_die (real_pdi
->spec_offset
,
19019 real_pdi
->spec_is_dwz
, cu
);
19020 real_pdi
= res
.pdi
;
19024 if (real_pdi
->die_parent
!= NULL
)
19027 for (child_pdi
= struct_pdi
->die_child
;
19029 child_pdi
= child_pdi
->die_sibling
)
19031 if (child_pdi
->tag
== DW_TAG_subprogram
19032 && child_pdi
->linkage_name
!= NULL
)
19034 char *actual_class_name
19035 = language_class_name_from_physname (cu
->language_defn
,
19036 child_pdi
->linkage_name
);
19037 if (actual_class_name
!= NULL
)
19039 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19042 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
19044 strlen (actual_class_name
)));
19045 xfree (actual_class_name
);
19053 partial_die_info::fixup (struct dwarf2_cu
*cu
)
19055 /* Once we've fixed up a die, there's no point in doing so again.
19056 This also avoids a memory leak if we were to call
19057 guess_partial_die_structure_name multiple times. */
19061 /* If we found a reference attribute and the DIE has no name, try
19062 to find a name in the referred to DIE. */
19064 if (name
== NULL
&& has_specification
)
19066 struct partial_die_info
*spec_die
;
19068 auto res
= find_partial_die (spec_offset
, spec_is_dwz
, cu
);
19069 spec_die
= res
.pdi
;
19072 spec_die
->fixup (cu
);
19074 if (spec_die
->name
)
19076 name
= spec_die
->name
;
19078 /* Copy DW_AT_external attribute if it is set. */
19079 if (spec_die
->is_external
)
19080 is_external
= spec_die
->is_external
;
19084 /* Set default names for some unnamed DIEs. */
19086 if (name
== NULL
&& tag
== DW_TAG_namespace
)
19087 name
= CP_ANONYMOUS_NAMESPACE_STR
;
19089 /* If there is no parent die to provide a namespace, and there are
19090 children, see if we can determine the namespace from their linkage
19092 if (cu
->language
== language_cplus
19093 && !VEC_empty (dwarf2_section_info_def
,
19094 cu
->per_cu
->dwarf2_per_objfile
->types
)
19095 && die_parent
== NULL
19097 && (tag
== DW_TAG_class_type
19098 || tag
== DW_TAG_structure_type
19099 || tag
== DW_TAG_union_type
))
19100 guess_partial_die_structure_name (this, cu
);
19102 /* GCC might emit a nameless struct or union that has a linkage
19103 name. See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
19105 && (tag
== DW_TAG_class_type
19106 || tag
== DW_TAG_interface_type
19107 || tag
== DW_TAG_structure_type
19108 || tag
== DW_TAG_union_type
)
19109 && linkage_name
!= NULL
)
19113 demangled
= gdb_demangle (linkage_name
, DMGL_TYPES
);
19118 /* Strip any leading namespaces/classes, keep only the base name.
19119 DW_AT_name for named DIEs does not contain the prefixes. */
19120 base
= strrchr (demangled
, ':');
19121 if (base
&& base
> demangled
&& base
[-1] == ':')
19126 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
19129 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
19130 base
, strlen (base
)));
19138 /* Read an attribute value described by an attribute form. */
19140 static const gdb_byte
*
19141 read_attribute_value (const struct die_reader_specs
*reader
,
19142 struct attribute
*attr
, unsigned form
,
19143 LONGEST implicit_const
, const gdb_byte
*info_ptr
)
19145 struct dwarf2_cu
*cu
= reader
->cu
;
19146 struct dwarf2_per_objfile
*dwarf2_per_objfile
19147 = cu
->per_cu
->dwarf2_per_objfile
;
19148 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19149 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
19150 bfd
*abfd
= reader
->abfd
;
19151 struct comp_unit_head
*cu_header
= &cu
->header
;
19152 unsigned int bytes_read
;
19153 struct dwarf_block
*blk
;
19155 attr
->form
= (enum dwarf_form
) form
;
19158 case DW_FORM_ref_addr
:
19159 if (cu
->header
.version
== 2)
19160 DW_UNSND (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
19162 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
,
19163 &cu
->header
, &bytes_read
);
19164 info_ptr
+= bytes_read
;
19166 case DW_FORM_GNU_ref_alt
:
19167 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
19168 info_ptr
+= bytes_read
;
19171 DW_ADDR (attr
) = read_address (abfd
, info_ptr
, cu
, &bytes_read
);
19172 DW_ADDR (attr
) = gdbarch_adjust_dwarf2_addr (gdbarch
, DW_ADDR (attr
));
19173 info_ptr
+= bytes_read
;
19175 case DW_FORM_block2
:
19176 blk
= dwarf_alloc_block (cu
);
19177 blk
->size
= read_2_bytes (abfd
, info_ptr
);
19179 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19180 info_ptr
+= blk
->size
;
19181 DW_BLOCK (attr
) = blk
;
19183 case DW_FORM_block4
:
19184 blk
= dwarf_alloc_block (cu
);
19185 blk
->size
= read_4_bytes (abfd
, info_ptr
);
19187 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19188 info_ptr
+= blk
->size
;
19189 DW_BLOCK (attr
) = blk
;
19191 case DW_FORM_data2
:
19192 DW_UNSND (attr
) = read_2_bytes (abfd
, info_ptr
);
19195 case DW_FORM_data4
:
19196 DW_UNSND (attr
) = read_4_bytes (abfd
, info_ptr
);
19199 case DW_FORM_data8
:
19200 DW_UNSND (attr
) = read_8_bytes (abfd
, info_ptr
);
19203 case DW_FORM_data16
:
19204 blk
= dwarf_alloc_block (cu
);
19206 blk
->data
= read_n_bytes (abfd
, info_ptr
, 16);
19208 DW_BLOCK (attr
) = blk
;
19210 case DW_FORM_sec_offset
:
19211 DW_UNSND (attr
) = read_offset (abfd
, info_ptr
, &cu
->header
, &bytes_read
);
19212 info_ptr
+= bytes_read
;
19214 case DW_FORM_string
:
19215 DW_STRING (attr
) = read_direct_string (abfd
, info_ptr
, &bytes_read
);
19216 DW_STRING_IS_CANONICAL (attr
) = 0;
19217 info_ptr
+= bytes_read
;
19220 if (!cu
->per_cu
->is_dwz
)
19222 DW_STRING (attr
) = read_indirect_string (dwarf2_per_objfile
,
19223 abfd
, info_ptr
, cu_header
,
19225 DW_STRING_IS_CANONICAL (attr
) = 0;
19226 info_ptr
+= bytes_read
;
19230 case DW_FORM_line_strp
:
19231 if (!cu
->per_cu
->is_dwz
)
19233 DW_STRING (attr
) = read_indirect_line_string (dwarf2_per_objfile
,
19235 cu_header
, &bytes_read
);
19236 DW_STRING_IS_CANONICAL (attr
) = 0;
19237 info_ptr
+= bytes_read
;
19241 case DW_FORM_GNU_strp_alt
:
19243 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
19244 LONGEST str_offset
= read_offset (abfd
, info_ptr
, cu_header
,
19247 DW_STRING (attr
) = read_indirect_string_from_dwz (objfile
,
19249 DW_STRING_IS_CANONICAL (attr
) = 0;
19250 info_ptr
+= bytes_read
;
19253 case DW_FORM_exprloc
:
19254 case DW_FORM_block
:
19255 blk
= dwarf_alloc_block (cu
);
19256 blk
->size
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19257 info_ptr
+= bytes_read
;
19258 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19259 info_ptr
+= blk
->size
;
19260 DW_BLOCK (attr
) = blk
;
19262 case DW_FORM_block1
:
19263 blk
= dwarf_alloc_block (cu
);
19264 blk
->size
= read_1_byte (abfd
, info_ptr
);
19266 blk
->data
= read_n_bytes (abfd
, info_ptr
, blk
->size
);
19267 info_ptr
+= blk
->size
;
19268 DW_BLOCK (attr
) = blk
;
19270 case DW_FORM_data1
:
19271 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19275 DW_UNSND (attr
) = read_1_byte (abfd
, info_ptr
);
19278 case DW_FORM_flag_present
:
19279 DW_UNSND (attr
) = 1;
19281 case DW_FORM_sdata
:
19282 DW_SND (attr
) = read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19283 info_ptr
+= bytes_read
;
19285 case DW_FORM_udata
:
19286 DW_UNSND (attr
) = read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19287 info_ptr
+= bytes_read
;
19290 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19291 + read_1_byte (abfd
, info_ptr
));
19295 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19296 + read_2_bytes (abfd
, info_ptr
));
19300 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19301 + read_4_bytes (abfd
, info_ptr
));
19305 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19306 + read_8_bytes (abfd
, info_ptr
));
19309 case DW_FORM_ref_sig8
:
19310 DW_SIGNATURE (attr
) = read_8_bytes (abfd
, info_ptr
);
19313 case DW_FORM_ref_udata
:
19314 DW_UNSND (attr
) = (to_underlying (cu
->header
.sect_off
)
19315 + read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
));
19316 info_ptr
+= bytes_read
;
19318 case DW_FORM_indirect
:
19319 form
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19320 info_ptr
+= bytes_read
;
19321 if (form
== DW_FORM_implicit_const
)
19323 implicit_const
= read_signed_leb128 (abfd
, info_ptr
, &bytes_read
);
19324 info_ptr
+= bytes_read
;
19326 info_ptr
= read_attribute_value (reader
, attr
, form
, implicit_const
,
19329 case DW_FORM_implicit_const
:
19330 DW_SND (attr
) = implicit_const
;
19332 case DW_FORM_addrx
:
19333 case DW_FORM_GNU_addr_index
:
19334 if (reader
->dwo_file
== NULL
)
19336 /* For now flag a hard error.
19337 Later we can turn this into a complaint. */
19338 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19339 dwarf_form_name (form
),
19340 bfd_get_filename (abfd
));
19342 DW_ADDR (attr
) = read_addr_index_from_leb128 (cu
, info_ptr
, &bytes_read
);
19343 info_ptr
+= bytes_read
;
19346 case DW_FORM_strx1
:
19347 case DW_FORM_strx2
:
19348 case DW_FORM_strx3
:
19349 case DW_FORM_strx4
:
19350 case DW_FORM_GNU_str_index
:
19351 if (reader
->dwo_file
== NULL
)
19353 /* For now flag a hard error.
19354 Later we can turn this into a complaint if warranted. */
19355 error (_("Dwarf Error: %s found in non-DWO CU [in module %s]"),
19356 dwarf_form_name (form
),
19357 bfd_get_filename (abfd
));
19360 ULONGEST str_index
;
19361 if (form
== DW_FORM_strx1
)
19363 str_index
= read_1_byte (abfd
, info_ptr
);
19366 else if (form
== DW_FORM_strx2
)
19368 str_index
= read_2_bytes (abfd
, info_ptr
);
19371 else if (form
== DW_FORM_strx3
)
19373 str_index
= read_3_bytes (abfd
, info_ptr
);
19376 else if (form
== DW_FORM_strx4
)
19378 str_index
= read_4_bytes (abfd
, info_ptr
);
19383 str_index
= read_unsigned_leb128 (abfd
, info_ptr
, &bytes_read
);
19384 info_ptr
+= bytes_read
;
19386 DW_STRING (attr
) = read_str_index (reader
, str_index
);
19387 DW_STRING_IS_CANONICAL (attr
) = 0;
19391 error (_("Dwarf Error: Cannot handle %s in DWARF reader [in module %s]"),
19392 dwarf_form_name (form
),
19393 bfd_get_filename (abfd
));
19397 if (cu
->per_cu
->is_dwz
&& attr_form_is_ref (attr
))
19398 attr
->form
= DW_FORM_GNU_ref_alt
;
19400 /* We have seen instances where the compiler tried to emit a byte
19401 size attribute of -1 which ended up being encoded as an unsigned
19402 0xffffffff. Although 0xffffffff is technically a valid size value,
19403 an object of this size seems pretty unlikely so we can relatively
19404 safely treat these cases as if the size attribute was invalid and
19405 treat them as zero by default. */
19406 if (attr
->name
== DW_AT_byte_size
19407 && form
== DW_FORM_data4
19408 && DW_UNSND (attr
) >= 0xffffffff)
19411 (_("Suspicious DW_AT_byte_size value treated as zero instead of %s"),
19412 hex_string (DW_UNSND (attr
)));
19413 DW_UNSND (attr
) = 0;
19419 /* Read an attribute described by an abbreviated attribute. */
19421 static const gdb_byte
*
19422 read_attribute (const struct die_reader_specs
*reader
,
19423 struct attribute
*attr
, struct attr_abbrev
*abbrev
,
19424 const gdb_byte
*info_ptr
)
19426 attr
->name
= abbrev
->name
;
19427 return read_attribute_value (reader
, attr
, abbrev
->form
,
19428 abbrev
->implicit_const
, info_ptr
);
19431 /* Read dwarf information from a buffer. */
19433 static unsigned int
19434 read_1_byte (bfd
*abfd
, const gdb_byte
*buf
)
19436 return bfd_get_8 (abfd
, buf
);
19440 read_1_signed_byte (bfd
*abfd
, const gdb_byte
*buf
)
19442 return bfd_get_signed_8 (abfd
, buf
);
19445 static unsigned int
19446 read_2_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19448 return bfd_get_16 (abfd
, buf
);
19452 read_2_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19454 return bfd_get_signed_16 (abfd
, buf
);
19457 static unsigned int
19458 read_3_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19460 unsigned int result
= 0;
19461 for (int i
= 0; i
< 3; ++i
)
19463 unsigned char byte
= bfd_get_8 (abfd
, buf
);
19465 result
|= ((unsigned int) byte
<< (i
* 8));
19470 static unsigned int
19471 read_4_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19473 return bfd_get_32 (abfd
, buf
);
19477 read_4_signed_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19479 return bfd_get_signed_32 (abfd
, buf
);
19483 read_8_bytes (bfd
*abfd
, const gdb_byte
*buf
)
19485 return bfd_get_64 (abfd
, buf
);
19489 read_address (bfd
*abfd
, const gdb_byte
*buf
, struct dwarf2_cu
*cu
,
19490 unsigned int *bytes_read
)
19492 struct comp_unit_head
*cu_header
= &cu
->header
;
19493 CORE_ADDR retval
= 0;
19495 if (cu_header
->signed_addr_p
)
19497 switch (cu_header
->addr_size
)
19500 retval
= bfd_get_signed_16 (abfd
, buf
);
19503 retval
= bfd_get_signed_32 (abfd
, buf
);
19506 retval
= bfd_get_signed_64 (abfd
, buf
);
19509 internal_error (__FILE__
, __LINE__
,
19510 _("read_address: bad switch, signed [in module %s]"),
19511 bfd_get_filename (abfd
));
19516 switch (cu_header
->addr_size
)
19519 retval
= bfd_get_16 (abfd
, buf
);
19522 retval
= bfd_get_32 (abfd
, buf
);
19525 retval
= bfd_get_64 (abfd
, buf
);
19528 internal_error (__FILE__
, __LINE__
,
19529 _("read_address: bad switch, "
19530 "unsigned [in module %s]"),
19531 bfd_get_filename (abfd
));
19535 *bytes_read
= cu_header
->addr_size
;
19539 /* Read the initial length from a section. The (draft) DWARF 3
19540 specification allows the initial length to take up either 4 bytes
19541 or 12 bytes. If the first 4 bytes are 0xffffffff, then the next 8
19542 bytes describe the length and all offsets will be 8 bytes in length
19545 An older, non-standard 64-bit format is also handled by this
19546 function. The older format in question stores the initial length
19547 as an 8-byte quantity without an escape value. Lengths greater
19548 than 2^32 aren't very common which means that the initial 4 bytes
19549 is almost always zero. Since a length value of zero doesn't make
19550 sense for the 32-bit format, this initial zero can be considered to
19551 be an escape value which indicates the presence of the older 64-bit
19552 format. As written, the code can't detect (old format) lengths
19553 greater than 4GB. If it becomes necessary to handle lengths
19554 somewhat larger than 4GB, we could allow other small values (such
19555 as the non-sensical values of 1, 2, and 3) to also be used as
19556 escape values indicating the presence of the old format.
19558 The value returned via bytes_read should be used to increment the
19559 relevant pointer after calling read_initial_length().
19561 [ Note: read_initial_length() and read_offset() are based on the
19562 document entitled "DWARF Debugging Information Format", revision
19563 3, draft 8, dated November 19, 2001. This document was obtained
19566 http://reality.sgiweb.org/davea/dwarf3-draft8-011125.pdf
19568 This document is only a draft and is subject to change. (So beware.)
19570 Details regarding the older, non-standard 64-bit format were
19571 determined empirically by examining 64-bit ELF files produced by
19572 the SGI toolchain on an IRIX 6.5 machine.
19574 - Kevin, July 16, 2002
19578 read_initial_length (bfd
*abfd
, const gdb_byte
*buf
, unsigned int *bytes_read
)
19580 LONGEST length
= bfd_get_32 (abfd
, buf
);
19582 if (length
== 0xffffffff)
19584 length
= bfd_get_64 (abfd
, buf
+ 4);
19587 else if (length
== 0)
19589 /* Handle the (non-standard) 64-bit DWARF2 format used by IRIX. */
19590 length
= bfd_get_64 (abfd
, buf
);
19601 /* Cover function for read_initial_length.
19602 Returns the length of the object at BUF, and stores the size of the
19603 initial length in *BYTES_READ and stores the size that offsets will be in
19605 If the initial length size is not equivalent to that specified in
19606 CU_HEADER then issue a complaint.
19607 This is useful when reading non-comp-unit headers. */
19610 read_checked_initial_length_and_offset (bfd
*abfd
, const gdb_byte
*buf
,
19611 const struct comp_unit_head
*cu_header
,
19612 unsigned int *bytes_read
,
19613 unsigned int *offset_size
)
19615 LONGEST length
= read_initial_length (abfd
, buf
, bytes_read
);
19617 gdb_assert (cu_header
->initial_length_size
== 4
19618 || cu_header
->initial_length_size
== 8
19619 || cu_header
->initial_length_size
== 12);
19621 if (cu_header
->initial_length_size
!= *bytes_read
)
19622 complaint (_("intermixed 32-bit and 64-bit DWARF sections"));
19624 *offset_size
= (*bytes_read
== 4) ? 4 : 8;
19628 /* Read an offset from the data stream. The size of the offset is
19629 given by cu_header->offset_size. */
19632 read_offset (bfd
*abfd
, const gdb_byte
*buf
,
19633 const struct comp_unit_head
*cu_header
,
19634 unsigned int *bytes_read
)
19636 LONGEST offset
= read_offset_1 (abfd
, buf
, cu_header
->offset_size
);
19638 *bytes_read
= cu_header
->offset_size
;
19642 /* Read an offset from the data stream. */
19645 read_offset_1 (bfd
*abfd
, const gdb_byte
*buf
, unsigned int offset_size
)
19647 LONGEST retval
= 0;
19649 switch (offset_size
)
19652 retval
= bfd_get_32 (abfd
, buf
);
19655 retval
= bfd_get_64 (abfd
, buf
);
19658 internal_error (__FILE__
, __LINE__
,
19659 _("read_offset_1: bad switch [in module %s]"),
19660 bfd_get_filename (abfd
));
19666 static const gdb_byte
*
19667 read_n_bytes (bfd
*abfd
, const gdb_byte
*buf
, unsigned int size
)
19669 /* If the size of a host char is 8 bits, we can return a pointer
19670 to the buffer, otherwise we have to copy the data to a buffer
19671 allocated on the temporary obstack. */
19672 gdb_assert (HOST_CHAR_BIT
== 8);
19676 static const char *
19677 read_direct_string (bfd
*abfd
, const gdb_byte
*buf
,
19678 unsigned int *bytes_read_ptr
)
19680 /* If the size of a host char is 8 bits, we can return a pointer
19681 to the string, otherwise we have to copy the string to a buffer
19682 allocated on the temporary obstack. */
19683 gdb_assert (HOST_CHAR_BIT
== 8);
19686 *bytes_read_ptr
= 1;
19689 *bytes_read_ptr
= strlen ((const char *) buf
) + 1;
19690 return (const char *) buf
;
19693 /* Return pointer to string at section SECT offset STR_OFFSET with error
19694 reporting strings FORM_NAME and SECT_NAME. */
19696 static const char *
19697 read_indirect_string_at_offset_from (struct objfile
*objfile
,
19698 bfd
*abfd
, LONGEST str_offset
,
19699 struct dwarf2_section_info
*sect
,
19700 const char *form_name
,
19701 const char *sect_name
)
19703 dwarf2_read_section (objfile
, sect
);
19704 if (sect
->buffer
== NULL
)
19705 error (_("%s used without %s section [in module %s]"),
19706 form_name
, sect_name
, bfd_get_filename (abfd
));
19707 if (str_offset
>= sect
->size
)
19708 error (_("%s pointing outside of %s section [in module %s]"),
19709 form_name
, sect_name
, bfd_get_filename (abfd
));
19710 gdb_assert (HOST_CHAR_BIT
== 8);
19711 if (sect
->buffer
[str_offset
] == '\0')
19713 return (const char *) (sect
->buffer
+ str_offset
);
19716 /* Return pointer to string at .debug_str offset STR_OFFSET. */
19718 static const char *
19719 read_indirect_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19720 bfd
*abfd
, LONGEST str_offset
)
19722 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19724 &dwarf2_per_objfile
->str
,
19725 "DW_FORM_strp", ".debug_str");
19728 /* Return pointer to string at .debug_line_str offset STR_OFFSET. */
19730 static const char *
19731 read_indirect_line_string_at_offset (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19732 bfd
*abfd
, LONGEST str_offset
)
19734 return read_indirect_string_at_offset_from (dwarf2_per_objfile
->objfile
,
19736 &dwarf2_per_objfile
->line_str
,
19737 "DW_FORM_line_strp",
19738 ".debug_line_str");
19741 /* Read a string at offset STR_OFFSET in the .debug_str section from
19742 the .dwz file DWZ. Throw an error if the offset is too large. If
19743 the string consists of a single NUL byte, return NULL; otherwise
19744 return a pointer to the string. */
19746 static const char *
19747 read_indirect_string_from_dwz (struct objfile
*objfile
, struct dwz_file
*dwz
,
19748 LONGEST str_offset
)
19750 dwarf2_read_section (objfile
, &dwz
->str
);
19752 if (dwz
->str
.buffer
== NULL
)
19753 error (_("DW_FORM_GNU_strp_alt used without .debug_str "
19754 "section [in module %s]"),
19755 bfd_get_filename (dwz
->dwz_bfd
));
19756 if (str_offset
>= dwz
->str
.size
)
19757 error (_("DW_FORM_GNU_strp_alt pointing outside of "
19758 ".debug_str section [in module %s]"),
19759 bfd_get_filename (dwz
->dwz_bfd
));
19760 gdb_assert (HOST_CHAR_BIT
== 8);
19761 if (dwz
->str
.buffer
[str_offset
] == '\0')
19763 return (const char *) (dwz
->str
.buffer
+ str_offset
);
19766 /* Return pointer to string at .debug_str offset as read from BUF.
19767 BUF is assumed to be in a compilation unit described by CU_HEADER.
19768 Return *BYTES_READ_PTR count of bytes read from BUF. */
19770 static const char *
19771 read_indirect_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
, bfd
*abfd
,
19772 const gdb_byte
*buf
,
19773 const struct comp_unit_head
*cu_header
,
19774 unsigned int *bytes_read_ptr
)
19776 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19778 return read_indirect_string_at_offset (dwarf2_per_objfile
, abfd
, str_offset
);
19781 /* Return pointer to string at .debug_line_str offset as read from BUF.
19782 BUF is assumed to be in a compilation unit described by CU_HEADER.
19783 Return *BYTES_READ_PTR count of bytes read from BUF. */
19785 static const char *
19786 read_indirect_line_string (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19787 bfd
*abfd
, const gdb_byte
*buf
,
19788 const struct comp_unit_head
*cu_header
,
19789 unsigned int *bytes_read_ptr
)
19791 LONGEST str_offset
= read_offset (abfd
, buf
, cu_header
, bytes_read_ptr
);
19793 return read_indirect_line_string_at_offset (dwarf2_per_objfile
, abfd
,
19798 read_unsigned_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19799 unsigned int *bytes_read_ptr
)
19802 unsigned int num_read
;
19804 unsigned char byte
;
19811 byte
= bfd_get_8 (abfd
, buf
);
19814 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19815 if ((byte
& 128) == 0)
19821 *bytes_read_ptr
= num_read
;
19826 read_signed_leb128 (bfd
*abfd
, const gdb_byte
*buf
,
19827 unsigned int *bytes_read_ptr
)
19830 int shift
, num_read
;
19831 unsigned char byte
;
19838 byte
= bfd_get_8 (abfd
, buf
);
19841 result
|= ((ULONGEST
) (byte
& 127) << shift
);
19843 if ((byte
& 128) == 0)
19848 if ((shift
< 8 * sizeof (result
)) && (byte
& 0x40))
19849 result
|= -(((ULONGEST
) 1) << shift
);
19850 *bytes_read_ptr
= num_read
;
19854 /* Given index ADDR_INDEX in .debug_addr, fetch the value.
19855 ADDR_BASE is the DW_AT_GNU_addr_base attribute or zero.
19856 ADDR_SIZE is the size of addresses from the CU header. */
19859 read_addr_index_1 (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
19860 unsigned int addr_index
, ULONGEST addr_base
, int addr_size
)
19862 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19863 bfd
*abfd
= objfile
->obfd
;
19864 const gdb_byte
*info_ptr
;
19866 dwarf2_read_section (objfile
, &dwarf2_per_objfile
->addr
);
19867 if (dwarf2_per_objfile
->addr
.buffer
== NULL
)
19868 error (_("DW_FORM_addr_index used without .debug_addr section [in module %s]"),
19869 objfile_name (objfile
));
19870 if (addr_base
+ addr_index
* addr_size
>= dwarf2_per_objfile
->addr
.size
)
19871 error (_("DW_FORM_addr_index pointing outside of "
19872 ".debug_addr section [in module %s]"),
19873 objfile_name (objfile
));
19874 info_ptr
= (dwarf2_per_objfile
->addr
.buffer
19875 + addr_base
+ addr_index
* addr_size
);
19876 if (addr_size
== 4)
19877 return bfd_get_32 (abfd
, info_ptr
);
19879 return bfd_get_64 (abfd
, info_ptr
);
19882 /* Given index ADDR_INDEX in .debug_addr, fetch the value. */
19885 read_addr_index (struct dwarf2_cu
*cu
, unsigned int addr_index
)
19887 return read_addr_index_1 (cu
->per_cu
->dwarf2_per_objfile
, addr_index
,
19888 cu
->addr_base
, cu
->header
.addr_size
);
19891 /* Given a pointer to an leb128 value, fetch the value from .debug_addr. */
19894 read_addr_index_from_leb128 (struct dwarf2_cu
*cu
, const gdb_byte
*info_ptr
,
19895 unsigned int *bytes_read
)
19897 bfd
*abfd
= cu
->per_cu
->dwarf2_per_objfile
->objfile
->obfd
;
19898 unsigned int addr_index
= read_unsigned_leb128 (abfd
, info_ptr
, bytes_read
);
19900 return read_addr_index (cu
, addr_index
);
19903 /* Data structure to pass results from dwarf2_read_addr_index_reader
19904 back to dwarf2_read_addr_index. */
19906 struct dwarf2_read_addr_index_data
19908 ULONGEST addr_base
;
19912 /* die_reader_func for dwarf2_read_addr_index. */
19915 dwarf2_read_addr_index_reader (const struct die_reader_specs
*reader
,
19916 const gdb_byte
*info_ptr
,
19917 struct die_info
*comp_unit_die
,
19921 struct dwarf2_cu
*cu
= reader
->cu
;
19922 struct dwarf2_read_addr_index_data
*aidata
=
19923 (struct dwarf2_read_addr_index_data
*) data
;
19925 aidata
->addr_base
= cu
->addr_base
;
19926 aidata
->addr_size
= cu
->header
.addr_size
;
19929 /* Given an index in .debug_addr, fetch the value.
19930 NOTE: This can be called during dwarf expression evaluation,
19931 long after the debug information has been read, and thus per_cu->cu
19932 may no longer exist. */
19935 dwarf2_read_addr_index (struct dwarf2_per_cu_data
*per_cu
,
19936 unsigned int addr_index
)
19938 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
19939 struct dwarf2_cu
*cu
= per_cu
->cu
;
19940 ULONGEST addr_base
;
19943 /* We need addr_base and addr_size.
19944 If we don't have PER_CU->cu, we have to get it.
19945 Nasty, but the alternative is storing the needed info in PER_CU,
19946 which at this point doesn't seem justified: it's not clear how frequently
19947 it would get used and it would increase the size of every PER_CU.
19948 Entry points like dwarf2_per_cu_addr_size do a similar thing
19949 so we're not in uncharted territory here.
19950 Alas we need to be a bit more complicated as addr_base is contained
19953 We don't need to read the entire CU(/TU).
19954 We just need the header and top level die.
19956 IWBN to use the aging mechanism to let us lazily later discard the CU.
19957 For now we skip this optimization. */
19961 addr_base
= cu
->addr_base
;
19962 addr_size
= cu
->header
.addr_size
;
19966 struct dwarf2_read_addr_index_data aidata
;
19968 /* Note: We can't use init_cutu_and_read_dies_simple here,
19969 we need addr_base. */
19970 init_cutu_and_read_dies (per_cu
, NULL
, 0, 0, false,
19971 dwarf2_read_addr_index_reader
, &aidata
);
19972 addr_base
= aidata
.addr_base
;
19973 addr_size
= aidata
.addr_size
;
19976 return read_addr_index_1 (dwarf2_per_objfile
, addr_index
, addr_base
,
19980 /* Given a DW_FORM_GNU_str_index or DW_FORM_strx, fetch the string.
19981 This is only used by the Fission support. */
19983 static const char *
19984 read_str_index (const struct die_reader_specs
*reader
, ULONGEST str_index
)
19986 struct dwarf2_cu
*cu
= reader
->cu
;
19987 struct dwarf2_per_objfile
*dwarf2_per_objfile
19988 = cu
->per_cu
->dwarf2_per_objfile
;
19989 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
19990 const char *objf_name
= objfile_name (objfile
);
19991 bfd
*abfd
= objfile
->obfd
;
19992 struct dwarf2_section_info
*str_section
= &reader
->dwo_file
->sections
.str
;
19993 struct dwarf2_section_info
*str_offsets_section
=
19994 &reader
->dwo_file
->sections
.str_offsets
;
19995 const gdb_byte
*info_ptr
;
19996 ULONGEST str_offset
;
19997 static const char form_name
[] = "DW_FORM_GNU_str_index or DW_FORM_strx";
19999 dwarf2_read_section (objfile
, str_section
);
20000 dwarf2_read_section (objfile
, str_offsets_section
);
20001 if (str_section
->buffer
== NULL
)
20002 error (_("%s used without .debug_str.dwo section"
20003 " in CU at offset %s [in module %s]"),
20004 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
20005 if (str_offsets_section
->buffer
== NULL
)
20006 error (_("%s used without .debug_str_offsets.dwo section"
20007 " in CU at offset %s [in module %s]"),
20008 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
20009 if (str_index
* cu
->header
.offset_size
>= str_offsets_section
->size
)
20010 error (_("%s pointing outside of .debug_str_offsets.dwo"
20011 " section in CU at offset %s [in module %s]"),
20012 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
20013 info_ptr
= (str_offsets_section
->buffer
20014 + str_index
* cu
->header
.offset_size
);
20015 if (cu
->header
.offset_size
== 4)
20016 str_offset
= bfd_get_32 (abfd
, info_ptr
);
20018 str_offset
= bfd_get_64 (abfd
, info_ptr
);
20019 if (str_offset
>= str_section
->size
)
20020 error (_("Offset from %s pointing outside of"
20021 " .debug_str.dwo section in CU at offset %s [in module %s]"),
20022 form_name
, sect_offset_str (cu
->header
.sect_off
), objf_name
);
20023 return (const char *) (str_section
->buffer
+ str_offset
);
20026 /* Return the length of an LEB128 number in BUF. */
20029 leb128_size (const gdb_byte
*buf
)
20031 const gdb_byte
*begin
= buf
;
20037 if ((byte
& 128) == 0)
20038 return buf
- begin
;
20043 set_cu_language (unsigned int lang
, struct dwarf2_cu
*cu
)
20052 cu
->language
= language_c
;
20055 case DW_LANG_C_plus_plus
:
20056 case DW_LANG_C_plus_plus_11
:
20057 case DW_LANG_C_plus_plus_14
:
20058 cu
->language
= language_cplus
;
20061 cu
->language
= language_d
;
20063 case DW_LANG_Fortran77
:
20064 case DW_LANG_Fortran90
:
20065 case DW_LANG_Fortran95
:
20066 case DW_LANG_Fortran03
:
20067 case DW_LANG_Fortran08
:
20068 cu
->language
= language_fortran
;
20071 cu
->language
= language_go
;
20073 case DW_LANG_Mips_Assembler
:
20074 cu
->language
= language_asm
;
20076 case DW_LANG_Ada83
:
20077 case DW_LANG_Ada95
:
20078 cu
->language
= language_ada
;
20080 case DW_LANG_Modula2
:
20081 cu
->language
= language_m2
;
20083 case DW_LANG_Pascal83
:
20084 cu
->language
= language_pascal
;
20087 cu
->language
= language_objc
;
20090 case DW_LANG_Rust_old
:
20091 cu
->language
= language_rust
;
20093 case DW_LANG_Cobol74
:
20094 case DW_LANG_Cobol85
:
20096 cu
->language
= language_minimal
;
20099 cu
->language_defn
= language_def (cu
->language
);
20102 /* Return the named attribute or NULL if not there. */
20104 static struct attribute
*
20105 dwarf2_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
20110 struct attribute
*spec
= NULL
;
20112 for (i
= 0; i
< die
->num_attrs
; ++i
)
20114 if (die
->attrs
[i
].name
== name
)
20115 return &die
->attrs
[i
];
20116 if (die
->attrs
[i
].name
== DW_AT_specification
20117 || die
->attrs
[i
].name
== DW_AT_abstract_origin
)
20118 spec
= &die
->attrs
[i
];
20124 die
= follow_die_ref (die
, spec
, &cu
);
20130 /* Return the named attribute or NULL if not there,
20131 but do not follow DW_AT_specification, etc.
20132 This is for use in contexts where we're reading .debug_types dies.
20133 Following DW_AT_specification, DW_AT_abstract_origin will take us
20134 back up the chain, and we want to go down. */
20136 static struct attribute
*
20137 dwarf2_attr_no_follow (struct die_info
*die
, unsigned int name
)
20141 for (i
= 0; i
< die
->num_attrs
; ++i
)
20142 if (die
->attrs
[i
].name
== name
)
20143 return &die
->attrs
[i
];
20148 /* Return the string associated with a string-typed attribute, or NULL if it
20149 is either not found or is of an incorrect type. */
20151 static const char *
20152 dwarf2_string_attr (struct die_info
*die
, unsigned int name
, struct dwarf2_cu
*cu
)
20154 struct attribute
*attr
;
20155 const char *str
= NULL
;
20157 attr
= dwarf2_attr (die
, name
, cu
);
20161 if (attr
->form
== DW_FORM_strp
|| attr
->form
== DW_FORM_line_strp
20162 || attr
->form
== DW_FORM_string
20163 || attr
->form
== DW_FORM_strx
20164 || attr
->form
== DW_FORM_GNU_str_index
20165 || attr
->form
== DW_FORM_GNU_strp_alt
)
20166 str
= DW_STRING (attr
);
20168 complaint (_("string type expected for attribute %s for "
20169 "DIE at %s in module %s"),
20170 dwarf_attr_name (name
), sect_offset_str (die
->sect_off
),
20171 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
20177 /* Return non-zero iff the attribute NAME is defined for the given DIE,
20178 and holds a non-zero value. This function should only be used for
20179 DW_FORM_flag or DW_FORM_flag_present attributes. */
20182 dwarf2_flag_true_p (struct die_info
*die
, unsigned name
, struct dwarf2_cu
*cu
)
20184 struct attribute
*attr
= dwarf2_attr (die
, name
, cu
);
20186 return (attr
&& DW_UNSND (attr
));
20190 die_is_declaration (struct die_info
*die
, struct dwarf2_cu
*cu
)
20192 /* A DIE is a declaration if it has a DW_AT_declaration attribute
20193 which value is non-zero. However, we have to be careful with
20194 DIEs having a DW_AT_specification attribute, because dwarf2_attr()
20195 (via dwarf2_flag_true_p) follows this attribute. So we may
20196 end up accidently finding a declaration attribute that belongs
20197 to a different DIE referenced by the specification attribute,
20198 even though the given DIE does not have a declaration attribute. */
20199 return (dwarf2_flag_true_p (die
, DW_AT_declaration
, cu
)
20200 && dwarf2_attr (die
, DW_AT_specification
, cu
) == NULL
);
20203 /* Return the die giving the specification for DIE, if there is
20204 one. *SPEC_CU is the CU containing DIE on input, and the CU
20205 containing the return value on output. If there is no
20206 specification, but there is an abstract origin, that is
20209 static struct die_info
*
20210 die_specification (struct die_info
*die
, struct dwarf2_cu
**spec_cu
)
20212 struct attribute
*spec_attr
= dwarf2_attr (die
, DW_AT_specification
,
20215 if (spec_attr
== NULL
)
20216 spec_attr
= dwarf2_attr (die
, DW_AT_abstract_origin
, *spec_cu
);
20218 if (spec_attr
== NULL
)
20221 return follow_die_ref (die
, spec_attr
, spec_cu
);
20224 /* Stub for free_line_header to match void * callback types. */
20227 free_line_header_voidp (void *arg
)
20229 struct line_header
*lh
= (struct line_header
*) arg
;
20235 line_header::add_include_dir (const char *include_dir
)
20237 if (dwarf_line_debug
>= 2)
20238 fprintf_unfiltered (gdb_stdlog
, "Adding dir %zu: %s\n",
20239 include_dirs
.size () + 1, include_dir
);
20241 include_dirs
.push_back (include_dir
);
20245 line_header::add_file_name (const char *name
,
20247 unsigned int mod_time
,
20248 unsigned int length
)
20250 if (dwarf_line_debug
>= 2)
20251 fprintf_unfiltered (gdb_stdlog
, "Adding file %u: %s\n",
20252 (unsigned) file_names
.size () + 1, name
);
20254 file_names
.emplace_back (name
, d_index
, mod_time
, length
);
20257 /* A convenience function to find the proper .debug_line section for a CU. */
20259 static struct dwarf2_section_info
*
20260 get_debug_line_section (struct dwarf2_cu
*cu
)
20262 struct dwarf2_section_info
*section
;
20263 struct dwarf2_per_objfile
*dwarf2_per_objfile
20264 = cu
->per_cu
->dwarf2_per_objfile
;
20266 /* For TUs in DWO files, the DW_AT_stmt_list attribute lives in the
20268 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20269 section
= &cu
->dwo_unit
->dwo_file
->sections
.line
;
20270 else if (cu
->per_cu
->is_dwz
)
20272 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
20274 section
= &dwz
->line
;
20277 section
= &dwarf2_per_objfile
->line
;
20282 /* Read directory or file name entry format, starting with byte of
20283 format count entries, ULEB128 pairs of entry formats, ULEB128 of
20284 entries count and the entries themselves in the described entry
20288 read_formatted_entries (struct dwarf2_per_objfile
*dwarf2_per_objfile
,
20289 bfd
*abfd
, const gdb_byte
**bufp
,
20290 struct line_header
*lh
,
20291 const struct comp_unit_head
*cu_header
,
20292 void (*callback
) (struct line_header
*lh
,
20295 unsigned int mod_time
,
20296 unsigned int length
))
20298 gdb_byte format_count
, formati
;
20299 ULONGEST data_count
, datai
;
20300 const gdb_byte
*buf
= *bufp
;
20301 const gdb_byte
*format_header_data
;
20302 unsigned int bytes_read
;
20304 format_count
= read_1_byte (abfd
, buf
);
20306 format_header_data
= buf
;
20307 for (formati
= 0; formati
< format_count
; formati
++)
20309 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20311 read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20315 data_count
= read_unsigned_leb128 (abfd
, buf
, &bytes_read
);
20317 for (datai
= 0; datai
< data_count
; datai
++)
20319 const gdb_byte
*format
= format_header_data
;
20320 struct file_entry fe
;
20322 for (formati
= 0; formati
< format_count
; formati
++)
20324 ULONGEST content_type
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20325 format
+= bytes_read
;
20327 ULONGEST form
= read_unsigned_leb128 (abfd
, format
, &bytes_read
);
20328 format
+= bytes_read
;
20330 gdb::optional
<const char *> string
;
20331 gdb::optional
<unsigned int> uint
;
20335 case DW_FORM_string
:
20336 string
.emplace (read_direct_string (abfd
, buf
, &bytes_read
));
20340 case DW_FORM_line_strp
:
20341 string
.emplace (read_indirect_line_string (dwarf2_per_objfile
,
20348 case DW_FORM_data1
:
20349 uint
.emplace (read_1_byte (abfd
, buf
));
20353 case DW_FORM_data2
:
20354 uint
.emplace (read_2_bytes (abfd
, buf
));
20358 case DW_FORM_data4
:
20359 uint
.emplace (read_4_bytes (abfd
, buf
));
20363 case DW_FORM_data8
:
20364 uint
.emplace (read_8_bytes (abfd
, buf
));
20368 case DW_FORM_udata
:
20369 uint
.emplace (read_unsigned_leb128 (abfd
, buf
, &bytes_read
));
20373 case DW_FORM_block
:
20374 /* It is valid only for DW_LNCT_timestamp which is ignored by
20379 switch (content_type
)
20382 if (string
.has_value ())
20385 case DW_LNCT_directory_index
:
20386 if (uint
.has_value ())
20387 fe
.d_index
= (dir_index
) *uint
;
20389 case DW_LNCT_timestamp
:
20390 if (uint
.has_value ())
20391 fe
.mod_time
= *uint
;
20394 if (uint
.has_value ())
20400 complaint (_("Unknown format content type %s"),
20401 pulongest (content_type
));
20405 callback (lh
, fe
.name
, fe
.d_index
, fe
.mod_time
, fe
.length
);
20411 /* Read the statement program header starting at OFFSET in
20412 .debug_line, or .debug_line.dwo. Return a pointer
20413 to a struct line_header, allocated using xmalloc.
20414 Returns NULL if there is a problem reading the header, e.g., if it
20415 has a version we don't understand.
20417 NOTE: the strings in the include directory and file name tables of
20418 the returned object point into the dwarf line section buffer,
20419 and must not be freed. */
20421 static line_header_up
20422 dwarf_decode_line_header (sect_offset sect_off
, struct dwarf2_cu
*cu
)
20424 const gdb_byte
*line_ptr
;
20425 unsigned int bytes_read
, offset_size
;
20427 const char *cur_dir
, *cur_file
;
20428 struct dwarf2_section_info
*section
;
20430 struct dwarf2_per_objfile
*dwarf2_per_objfile
20431 = cu
->per_cu
->dwarf2_per_objfile
;
20433 section
= get_debug_line_section (cu
);
20434 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
20435 if (section
->buffer
== NULL
)
20437 if (cu
->dwo_unit
&& cu
->per_cu
->is_debug_types
)
20438 complaint (_("missing .debug_line.dwo section"));
20440 complaint (_("missing .debug_line section"));
20444 /* We can't do this until we know the section is non-empty.
20445 Only then do we know we have such a section. */
20446 abfd
= get_section_bfd_owner (section
);
20448 /* Make sure that at least there's room for the total_length field.
20449 That could be 12 bytes long, but we're just going to fudge that. */
20450 if (to_underlying (sect_off
) + 4 >= section
->size
)
20452 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20456 line_header_up
lh (new line_header ());
20458 lh
->sect_off
= sect_off
;
20459 lh
->offset_in_dwz
= cu
->per_cu
->is_dwz
;
20461 line_ptr
= section
->buffer
+ to_underlying (sect_off
);
20463 /* Read in the header. */
20465 read_checked_initial_length_and_offset (abfd
, line_ptr
, &cu
->header
,
20466 &bytes_read
, &offset_size
);
20467 line_ptr
+= bytes_read
;
20468 if (line_ptr
+ lh
->total_length
> (section
->buffer
+ section
->size
))
20470 dwarf2_statement_list_fits_in_line_number_section_complaint ();
20473 lh
->statement_program_end
= line_ptr
+ lh
->total_length
;
20474 lh
->version
= read_2_bytes (abfd
, line_ptr
);
20476 if (lh
->version
> 5)
20478 /* This is a version we don't understand. The format could have
20479 changed in ways we don't handle properly so just punt. */
20480 complaint (_("unsupported version in .debug_line section"));
20483 if (lh
->version
>= 5)
20485 gdb_byte segment_selector_size
;
20487 /* Skip address size. */
20488 read_1_byte (abfd
, line_ptr
);
20491 segment_selector_size
= read_1_byte (abfd
, line_ptr
);
20493 if (segment_selector_size
!= 0)
20495 complaint (_("unsupported segment selector size %u "
20496 "in .debug_line section"),
20497 segment_selector_size
);
20501 lh
->header_length
= read_offset_1 (abfd
, line_ptr
, offset_size
);
20502 line_ptr
+= offset_size
;
20503 lh
->minimum_instruction_length
= read_1_byte (abfd
, line_ptr
);
20505 if (lh
->version
>= 4)
20507 lh
->maximum_ops_per_instruction
= read_1_byte (abfd
, line_ptr
);
20511 lh
->maximum_ops_per_instruction
= 1;
20513 if (lh
->maximum_ops_per_instruction
== 0)
20515 lh
->maximum_ops_per_instruction
= 1;
20516 complaint (_("invalid maximum_ops_per_instruction "
20517 "in `.debug_line' section"));
20520 lh
->default_is_stmt
= read_1_byte (abfd
, line_ptr
);
20522 lh
->line_base
= read_1_signed_byte (abfd
, line_ptr
);
20524 lh
->line_range
= read_1_byte (abfd
, line_ptr
);
20526 lh
->opcode_base
= read_1_byte (abfd
, line_ptr
);
20528 lh
->standard_opcode_lengths
.reset (new unsigned char[lh
->opcode_base
]);
20530 lh
->standard_opcode_lengths
[0] = 1; /* This should never be used anyway. */
20531 for (i
= 1; i
< lh
->opcode_base
; ++i
)
20533 lh
->standard_opcode_lengths
[i
] = read_1_byte (abfd
, line_ptr
);
20537 if (lh
->version
>= 5)
20539 /* Read directory table. */
20540 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20542 [] (struct line_header
*header
, const char *name
,
20543 dir_index d_index
, unsigned int mod_time
,
20544 unsigned int length
)
20546 header
->add_include_dir (name
);
20549 /* Read file name table. */
20550 read_formatted_entries (dwarf2_per_objfile
, abfd
, &line_ptr
, lh
.get (),
20552 [] (struct line_header
*header
, const char *name
,
20553 dir_index d_index
, unsigned int mod_time
,
20554 unsigned int length
)
20556 header
->add_file_name (name
, d_index
, mod_time
, length
);
20561 /* Read directory table. */
20562 while ((cur_dir
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20564 line_ptr
+= bytes_read
;
20565 lh
->add_include_dir (cur_dir
);
20567 line_ptr
+= bytes_read
;
20569 /* Read file name table. */
20570 while ((cur_file
= read_direct_string (abfd
, line_ptr
, &bytes_read
)) != NULL
)
20572 unsigned int mod_time
, length
;
20575 line_ptr
+= bytes_read
;
20576 d_index
= (dir_index
) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20577 line_ptr
+= bytes_read
;
20578 mod_time
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20579 line_ptr
+= bytes_read
;
20580 length
= read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
20581 line_ptr
+= bytes_read
;
20583 lh
->add_file_name (cur_file
, d_index
, mod_time
, length
);
20585 line_ptr
+= bytes_read
;
20587 lh
->statement_program_start
= line_ptr
;
20589 if (line_ptr
> (section
->buffer
+ section
->size
))
20590 complaint (_("line number info header doesn't "
20591 "fit in `.debug_line' section"));
20596 /* Subroutine of dwarf_decode_lines to simplify it.
20597 Return the file name of the psymtab for included file FILE_INDEX
20598 in line header LH of PST.
20599 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
20600 If space for the result is malloc'd, *NAME_HOLDER will be set.
20601 Returns NULL if FILE_INDEX should be ignored, i.e., it is pst->filename. */
20603 static const char *
20604 psymtab_include_file_name (const struct line_header
*lh
, int file_index
,
20605 const struct partial_symtab
*pst
,
20606 const char *comp_dir
,
20607 gdb::unique_xmalloc_ptr
<char> *name_holder
)
20609 const file_entry
&fe
= lh
->file_names
[file_index
];
20610 const char *include_name
= fe
.name
;
20611 const char *include_name_to_compare
= include_name
;
20612 const char *pst_filename
;
20615 const char *dir_name
= fe
.include_dir (lh
);
20617 gdb::unique_xmalloc_ptr
<char> hold_compare
;
20618 if (!IS_ABSOLUTE_PATH (include_name
)
20619 && (dir_name
!= NULL
|| comp_dir
!= NULL
))
20621 /* Avoid creating a duplicate psymtab for PST.
20622 We do this by comparing INCLUDE_NAME and PST_FILENAME.
20623 Before we do the comparison, however, we need to account
20624 for DIR_NAME and COMP_DIR.
20625 First prepend dir_name (if non-NULL). If we still don't
20626 have an absolute path prepend comp_dir (if non-NULL).
20627 However, the directory we record in the include-file's
20628 psymtab does not contain COMP_DIR (to match the
20629 corresponding symtab(s)).
20634 bash$ gcc -g ./hello.c
20635 include_name = "hello.c"
20637 DW_AT_comp_dir = comp_dir = "/tmp"
20638 DW_AT_name = "./hello.c"
20642 if (dir_name
!= NULL
)
20644 name_holder
->reset (concat (dir_name
, SLASH_STRING
,
20645 include_name
, (char *) NULL
));
20646 include_name
= name_holder
->get ();
20647 include_name_to_compare
= include_name
;
20649 if (!IS_ABSOLUTE_PATH (include_name
) && comp_dir
!= NULL
)
20651 hold_compare
.reset (concat (comp_dir
, SLASH_STRING
,
20652 include_name
, (char *) NULL
));
20653 include_name_to_compare
= hold_compare
.get ();
20657 pst_filename
= pst
->filename
;
20658 gdb::unique_xmalloc_ptr
<char> copied_name
;
20659 if (!IS_ABSOLUTE_PATH (pst_filename
) && pst
->dirname
!= NULL
)
20661 copied_name
.reset (concat (pst
->dirname
, SLASH_STRING
,
20662 pst_filename
, (char *) NULL
));
20663 pst_filename
= copied_name
.get ();
20666 file_is_pst
= FILENAME_CMP (include_name_to_compare
, pst_filename
) == 0;
20670 return include_name
;
20673 /* State machine to track the state of the line number program. */
20675 class lnp_state_machine
20678 /* Initialize a machine state for the start of a line number
20680 lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
, line_header
*lh
,
20681 bool record_lines_p
);
20683 file_entry
*current_file ()
20685 /* lh->file_names is 0-based, but the file name numbers in the
20686 statement program are 1-based. */
20687 return m_line_header
->file_name_at (m_file
);
20690 /* Record the line in the state machine. END_SEQUENCE is true if
20691 we're processing the end of a sequence. */
20692 void record_line (bool end_sequence
);
20694 /* Check ADDRESS is zero and less than UNRELOCATED_LOWPC and if true
20695 nop-out rest of the lines in this sequence. */
20696 void check_line_address (struct dwarf2_cu
*cu
,
20697 const gdb_byte
*line_ptr
,
20698 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
);
20700 void handle_set_discriminator (unsigned int discriminator
)
20702 m_discriminator
= discriminator
;
20703 m_line_has_non_zero_discriminator
|= discriminator
!= 0;
20706 /* Handle DW_LNE_set_address. */
20707 void handle_set_address (CORE_ADDR baseaddr
, CORE_ADDR address
)
20710 address
+= baseaddr
;
20711 m_address
= gdbarch_adjust_dwarf2_line (m_gdbarch
, address
, false);
20714 /* Handle DW_LNS_advance_pc. */
20715 void handle_advance_pc (CORE_ADDR adjust
);
20717 /* Handle a special opcode. */
20718 void handle_special_opcode (unsigned char op_code
);
20720 /* Handle DW_LNS_advance_line. */
20721 void handle_advance_line (int line_delta
)
20723 advance_line (line_delta
);
20726 /* Handle DW_LNS_set_file. */
20727 void handle_set_file (file_name_index file
);
20729 /* Handle DW_LNS_negate_stmt. */
20730 void handle_negate_stmt ()
20732 m_is_stmt
= !m_is_stmt
;
20735 /* Handle DW_LNS_const_add_pc. */
20736 void handle_const_add_pc ();
20738 /* Handle DW_LNS_fixed_advance_pc. */
20739 void handle_fixed_advance_pc (CORE_ADDR addr_adj
)
20741 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20745 /* Handle DW_LNS_copy. */
20746 void handle_copy ()
20748 record_line (false);
20749 m_discriminator
= 0;
20752 /* Handle DW_LNE_end_sequence. */
20753 void handle_end_sequence ()
20755 m_currently_recording_lines
= true;
20759 /* Advance the line by LINE_DELTA. */
20760 void advance_line (int line_delta
)
20762 m_line
+= line_delta
;
20764 if (line_delta
!= 0)
20765 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20768 struct dwarf2_cu
*m_cu
;
20770 gdbarch
*m_gdbarch
;
20772 /* True if we're recording lines.
20773 Otherwise we're building partial symtabs and are just interested in
20774 finding include files mentioned by the line number program. */
20775 bool m_record_lines_p
;
20777 /* The line number header. */
20778 line_header
*m_line_header
;
20780 /* These are part of the standard DWARF line number state machine,
20781 and initialized according to the DWARF spec. */
20783 unsigned char m_op_index
= 0;
20784 /* The line table index (1-based) of the current file. */
20785 file_name_index m_file
= (file_name_index
) 1;
20786 unsigned int m_line
= 1;
20788 /* These are initialized in the constructor. */
20790 CORE_ADDR m_address
;
20792 unsigned int m_discriminator
;
20794 /* Additional bits of state we need to track. */
20796 /* The last file that we called dwarf2_start_subfile for.
20797 This is only used for TLLs. */
20798 unsigned int m_last_file
= 0;
20799 /* The last file a line number was recorded for. */
20800 struct subfile
*m_last_subfile
= NULL
;
20802 /* When true, record the lines we decode. */
20803 bool m_currently_recording_lines
= false;
20805 /* The last line number that was recorded, used to coalesce
20806 consecutive entries for the same line. This can happen, for
20807 example, when discriminators are present. PR 17276. */
20808 unsigned int m_last_line
= 0;
20809 bool m_line_has_non_zero_discriminator
= false;
20813 lnp_state_machine::handle_advance_pc (CORE_ADDR adjust
)
20815 CORE_ADDR addr_adj
= (((m_op_index
+ adjust
)
20816 / m_line_header
->maximum_ops_per_instruction
)
20817 * m_line_header
->minimum_instruction_length
);
20818 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20819 m_op_index
= ((m_op_index
+ adjust
)
20820 % m_line_header
->maximum_ops_per_instruction
);
20824 lnp_state_machine::handle_special_opcode (unsigned char op_code
)
20826 unsigned char adj_opcode
= op_code
- m_line_header
->opcode_base
;
20827 CORE_ADDR addr_adj
= (((m_op_index
20828 + (adj_opcode
/ m_line_header
->line_range
))
20829 / m_line_header
->maximum_ops_per_instruction
)
20830 * m_line_header
->minimum_instruction_length
);
20831 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20832 m_op_index
= ((m_op_index
+ (adj_opcode
/ m_line_header
->line_range
))
20833 % m_line_header
->maximum_ops_per_instruction
);
20835 int line_delta
= (m_line_header
->line_base
20836 + (adj_opcode
% m_line_header
->line_range
));
20837 advance_line (line_delta
);
20838 record_line (false);
20839 m_discriminator
= 0;
20843 lnp_state_machine::handle_set_file (file_name_index file
)
20847 const file_entry
*fe
= current_file ();
20849 dwarf2_debug_line_missing_file_complaint ();
20850 else if (m_record_lines_p
)
20852 const char *dir
= fe
->include_dir (m_line_header
);
20854 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
20855 m_line_has_non_zero_discriminator
= m_discriminator
!= 0;
20856 dwarf2_start_subfile (m_cu
, fe
->name
, dir
);
20861 lnp_state_machine::handle_const_add_pc ()
20864 = (255 - m_line_header
->opcode_base
) / m_line_header
->line_range
;
20867 = (((m_op_index
+ adjust
)
20868 / m_line_header
->maximum_ops_per_instruction
)
20869 * m_line_header
->minimum_instruction_length
);
20871 m_address
+= gdbarch_adjust_dwarf2_line (m_gdbarch
, addr_adj
, true);
20872 m_op_index
= ((m_op_index
+ adjust
)
20873 % m_line_header
->maximum_ops_per_instruction
);
20876 /* Return non-zero if we should add LINE to the line number table.
20877 LINE is the line to add, LAST_LINE is the last line that was added,
20878 LAST_SUBFILE is the subfile for LAST_LINE.
20879 LINE_HAS_NON_ZERO_DISCRIMINATOR is non-zero if LINE has ever
20880 had a non-zero discriminator.
20882 We have to be careful in the presence of discriminators.
20883 E.g., for this line:
20885 for (i = 0; i < 100000; i++);
20887 clang can emit four line number entries for that one line,
20888 each with a different discriminator.
20889 See gdb.dwarf2/dw2-single-line-discriminators.exp for an example.
20891 However, we want gdb to coalesce all four entries into one.
20892 Otherwise the user could stepi into the middle of the line and
20893 gdb would get confused about whether the pc really was in the
20894 middle of the line.
20896 Things are further complicated by the fact that two consecutive
20897 line number entries for the same line is a heuristic used by gcc
20898 to denote the end of the prologue. So we can't just discard duplicate
20899 entries, we have to be selective about it. The heuristic we use is
20900 that we only collapse consecutive entries for the same line if at least
20901 one of those entries has a non-zero discriminator. PR 17276.
20903 Note: Addresses in the line number state machine can never go backwards
20904 within one sequence, thus this coalescing is ok. */
20907 dwarf_record_line_p (struct dwarf2_cu
*cu
,
20908 unsigned int line
, unsigned int last_line
,
20909 int line_has_non_zero_discriminator
,
20910 struct subfile
*last_subfile
)
20912 if (cu
->get_builder ()->get_current_subfile () != last_subfile
)
20914 if (line
!= last_line
)
20916 /* Same line for the same file that we've seen already.
20917 As a last check, for pr 17276, only record the line if the line
20918 has never had a non-zero discriminator. */
20919 if (!line_has_non_zero_discriminator
)
20924 /* Use the CU's builder to record line number LINE beginning at
20925 address ADDRESS in the line table of subfile SUBFILE. */
20928 dwarf_record_line_1 (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20929 unsigned int line
, CORE_ADDR address
,
20930 struct dwarf2_cu
*cu
)
20932 CORE_ADDR addr
= gdbarch_addr_bits_remove (gdbarch
, address
);
20934 if (dwarf_line_debug
)
20936 fprintf_unfiltered (gdb_stdlog
,
20937 "Recording line %u, file %s, address %s\n",
20938 line
, lbasename (subfile
->name
),
20939 paddress (gdbarch
, address
));
20943 cu
->get_builder ()->record_line (subfile
, line
, addr
);
20946 /* Subroutine of dwarf_decode_lines_1 to simplify it.
20947 Mark the end of a set of line number records.
20948 The arguments are the same as for dwarf_record_line_1.
20949 If SUBFILE is NULL the request is ignored. */
20952 dwarf_finish_line (struct gdbarch
*gdbarch
, struct subfile
*subfile
,
20953 CORE_ADDR address
, struct dwarf2_cu
*cu
)
20955 if (subfile
== NULL
)
20958 if (dwarf_line_debug
)
20960 fprintf_unfiltered (gdb_stdlog
,
20961 "Finishing current line, file %s, address %s\n",
20962 lbasename (subfile
->name
),
20963 paddress (gdbarch
, address
));
20966 dwarf_record_line_1 (gdbarch
, subfile
, 0, address
, cu
);
20970 lnp_state_machine::record_line (bool end_sequence
)
20972 if (dwarf_line_debug
)
20974 fprintf_unfiltered (gdb_stdlog
,
20975 "Processing actual line %u: file %u,"
20976 " address %s, is_stmt %u, discrim %u\n",
20977 m_line
, to_underlying (m_file
),
20978 paddress (m_gdbarch
, m_address
),
20979 m_is_stmt
, m_discriminator
);
20982 file_entry
*fe
= current_file ();
20985 dwarf2_debug_line_missing_file_complaint ();
20986 /* For now we ignore lines not starting on an instruction boundary.
20987 But not when processing end_sequence for compatibility with the
20988 previous version of the code. */
20989 else if (m_op_index
== 0 || end_sequence
)
20991 fe
->included_p
= 1;
20992 if (m_record_lines_p
&& (producer_is_codewarrior (m_cu
) || m_is_stmt
))
20994 if (m_last_subfile
!= m_cu
->get_builder ()->get_current_subfile ()
20997 dwarf_finish_line (m_gdbarch
, m_last_subfile
, m_address
,
20998 m_currently_recording_lines
? m_cu
: nullptr);
21003 if (dwarf_record_line_p (m_cu
, m_line
, m_last_line
,
21004 m_line_has_non_zero_discriminator
,
21007 buildsym_compunit
*builder
= m_cu
->get_builder ();
21008 dwarf_record_line_1 (m_gdbarch
,
21009 builder
->get_current_subfile (),
21011 m_currently_recording_lines
? m_cu
: nullptr);
21013 m_last_subfile
= m_cu
->get_builder ()->get_current_subfile ();
21014 m_last_line
= m_line
;
21020 lnp_state_machine::lnp_state_machine (struct dwarf2_cu
*cu
, gdbarch
*arch
,
21021 line_header
*lh
, bool record_lines_p
)
21025 m_record_lines_p
= record_lines_p
;
21026 m_line_header
= lh
;
21028 m_currently_recording_lines
= true;
21030 /* Call `gdbarch_adjust_dwarf2_line' on the initial 0 address as if there
21031 was a line entry for it so that the backend has a chance to adjust it
21032 and also record it in case it needs it. This is currently used by MIPS
21033 code, cf. `mips_adjust_dwarf2_line'. */
21034 m_address
= gdbarch_adjust_dwarf2_line (arch
, 0, 0);
21035 m_is_stmt
= lh
->default_is_stmt
;
21036 m_discriminator
= 0;
21040 lnp_state_machine::check_line_address (struct dwarf2_cu
*cu
,
21041 const gdb_byte
*line_ptr
,
21042 CORE_ADDR unrelocated_lowpc
, CORE_ADDR address
)
21044 /* If ADDRESS < UNRELOCATED_LOWPC then it's not a usable value, it's outside
21045 the pc range of the CU. However, we restrict the test to only ADDRESS
21046 values of zero to preserve GDB's previous behaviour which is to handle
21047 the specific case of a function being GC'd by the linker. */
21049 if (address
== 0 && address
< unrelocated_lowpc
)
21051 /* This line table is for a function which has been
21052 GCd by the linker. Ignore it. PR gdb/12528 */
21054 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21055 long line_offset
= line_ptr
- get_debug_line_section (cu
)->buffer
;
21057 complaint (_(".debug_line address at offset 0x%lx is 0 [in module %s]"),
21058 line_offset
, objfile_name (objfile
));
21059 m_currently_recording_lines
= false;
21060 /* Note: m_currently_recording_lines is left as false until we see
21061 DW_LNE_end_sequence. */
21065 /* Subroutine of dwarf_decode_lines to simplify it.
21066 Process the line number information in LH.
21067 If DECODE_FOR_PST_P is non-zero, all we do is process the line number
21068 program in order to set included_p for every referenced header. */
21071 dwarf_decode_lines_1 (struct line_header
*lh
, struct dwarf2_cu
*cu
,
21072 const int decode_for_pst_p
, CORE_ADDR lowpc
)
21074 const gdb_byte
*line_ptr
, *extended_end
;
21075 const gdb_byte
*line_end
;
21076 unsigned int bytes_read
, extended_len
;
21077 unsigned char op_code
, extended_op
;
21078 CORE_ADDR baseaddr
;
21079 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21080 bfd
*abfd
= objfile
->obfd
;
21081 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21082 /* True if we're recording line info (as opposed to building partial
21083 symtabs and just interested in finding include files mentioned by
21084 the line number program). */
21085 bool record_lines_p
= !decode_for_pst_p
;
21087 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21089 line_ptr
= lh
->statement_program_start
;
21090 line_end
= lh
->statement_program_end
;
21092 /* Read the statement sequences until there's nothing left. */
21093 while (line_ptr
< line_end
)
21095 /* The DWARF line number program state machine. Reset the state
21096 machine at the start of each sequence. */
21097 lnp_state_machine
state_machine (cu
, gdbarch
, lh
, record_lines_p
);
21098 bool end_sequence
= false;
21100 if (record_lines_p
)
21102 /* Start a subfile for the current file of the state
21104 const file_entry
*fe
= state_machine
.current_file ();
21107 dwarf2_start_subfile (cu
, fe
->name
, fe
->include_dir (lh
));
21110 /* Decode the table. */
21111 while (line_ptr
< line_end
&& !end_sequence
)
21113 op_code
= read_1_byte (abfd
, line_ptr
);
21116 if (op_code
>= lh
->opcode_base
)
21118 /* Special opcode. */
21119 state_machine
.handle_special_opcode (op_code
);
21121 else switch (op_code
)
21123 case DW_LNS_extended_op
:
21124 extended_len
= read_unsigned_leb128 (abfd
, line_ptr
,
21126 line_ptr
+= bytes_read
;
21127 extended_end
= line_ptr
+ extended_len
;
21128 extended_op
= read_1_byte (abfd
, line_ptr
);
21130 switch (extended_op
)
21132 case DW_LNE_end_sequence
:
21133 state_machine
.handle_end_sequence ();
21134 end_sequence
= true;
21136 case DW_LNE_set_address
:
21139 = read_address (abfd
, line_ptr
, cu
, &bytes_read
);
21140 line_ptr
+= bytes_read
;
21142 state_machine
.check_line_address (cu
, line_ptr
,
21143 lowpc
- baseaddr
, address
);
21144 state_machine
.handle_set_address (baseaddr
, address
);
21147 case DW_LNE_define_file
:
21149 const char *cur_file
;
21150 unsigned int mod_time
, length
;
21153 cur_file
= read_direct_string (abfd
, line_ptr
,
21155 line_ptr
+= bytes_read
;
21156 dindex
= (dir_index
)
21157 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21158 line_ptr
+= bytes_read
;
21160 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21161 line_ptr
+= bytes_read
;
21163 read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21164 line_ptr
+= bytes_read
;
21165 lh
->add_file_name (cur_file
, dindex
, mod_time
, length
);
21168 case DW_LNE_set_discriminator
:
21170 /* The discriminator is not interesting to the
21171 debugger; just ignore it. We still need to
21172 check its value though:
21173 if there are consecutive entries for the same
21174 (non-prologue) line we want to coalesce them.
21177 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21178 line_ptr
+= bytes_read
;
21180 state_machine
.handle_set_discriminator (discr
);
21184 complaint (_("mangled .debug_line section"));
21187 /* Make sure that we parsed the extended op correctly. If e.g.
21188 we expected a different address size than the producer used,
21189 we may have read the wrong number of bytes. */
21190 if (line_ptr
!= extended_end
)
21192 complaint (_("mangled .debug_line section"));
21197 state_machine
.handle_copy ();
21199 case DW_LNS_advance_pc
:
21202 = read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21203 line_ptr
+= bytes_read
;
21205 state_machine
.handle_advance_pc (adjust
);
21208 case DW_LNS_advance_line
:
21211 = read_signed_leb128 (abfd
, line_ptr
, &bytes_read
);
21212 line_ptr
+= bytes_read
;
21214 state_machine
.handle_advance_line (line_delta
);
21217 case DW_LNS_set_file
:
21219 file_name_index file
21220 = (file_name_index
) read_unsigned_leb128 (abfd
, line_ptr
,
21222 line_ptr
+= bytes_read
;
21224 state_machine
.handle_set_file (file
);
21227 case DW_LNS_set_column
:
21228 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21229 line_ptr
+= bytes_read
;
21231 case DW_LNS_negate_stmt
:
21232 state_machine
.handle_negate_stmt ();
21234 case DW_LNS_set_basic_block
:
21236 /* Add to the address register of the state machine the
21237 address increment value corresponding to special opcode
21238 255. I.e., this value is scaled by the minimum
21239 instruction length since special opcode 255 would have
21240 scaled the increment. */
21241 case DW_LNS_const_add_pc
:
21242 state_machine
.handle_const_add_pc ();
21244 case DW_LNS_fixed_advance_pc
:
21246 CORE_ADDR addr_adj
= read_2_bytes (abfd
, line_ptr
);
21249 state_machine
.handle_fixed_advance_pc (addr_adj
);
21254 /* Unknown standard opcode, ignore it. */
21257 for (i
= 0; i
< lh
->standard_opcode_lengths
[op_code
]; i
++)
21259 (void) read_unsigned_leb128 (abfd
, line_ptr
, &bytes_read
);
21260 line_ptr
+= bytes_read
;
21267 dwarf2_debug_line_missing_end_sequence_complaint ();
21269 /* We got a DW_LNE_end_sequence (or we ran off the end of the buffer,
21270 in which case we still finish recording the last line). */
21271 state_machine
.record_line (true);
21275 /* Decode the Line Number Program (LNP) for the given line_header
21276 structure and CU. The actual information extracted and the type
21277 of structures created from the LNP depends on the value of PST.
21279 1. If PST is NULL, then this procedure uses the data from the program
21280 to create all necessary symbol tables, and their linetables.
21282 2. If PST is not NULL, this procedure reads the program to determine
21283 the list of files included by the unit represented by PST, and
21284 builds all the associated partial symbol tables.
21286 COMP_DIR is the compilation directory (DW_AT_comp_dir) or NULL if unknown.
21287 It is used for relative paths in the line table.
21288 NOTE: When processing partial symtabs (pst != NULL),
21289 comp_dir == pst->dirname.
21291 NOTE: It is important that psymtabs have the same file name (via strcmp)
21292 as the corresponding symtab. Since COMP_DIR is not used in the name of the
21293 symtab we don't use it in the name of the psymtabs we create.
21294 E.g. expand_line_sal requires this when finding psymtabs to expand.
21295 A good testcase for this is mb-inline.exp.
21297 LOWPC is the lowest address in CU (or 0 if not known).
21299 Boolean DECODE_MAPPING specifies we need to fully decode .debug_line
21300 for its PC<->lines mapping information. Otherwise only the filename
21301 table is read in. */
21304 dwarf_decode_lines (struct line_header
*lh
, const char *comp_dir
,
21305 struct dwarf2_cu
*cu
, struct partial_symtab
*pst
,
21306 CORE_ADDR lowpc
, int decode_mapping
)
21308 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21309 const int decode_for_pst_p
= (pst
!= NULL
);
21311 if (decode_mapping
)
21312 dwarf_decode_lines_1 (lh
, cu
, decode_for_pst_p
, lowpc
);
21314 if (decode_for_pst_p
)
21318 /* Now that we're done scanning the Line Header Program, we can
21319 create the psymtab of each included file. */
21320 for (file_index
= 0; file_index
< lh
->file_names
.size (); file_index
++)
21321 if (lh
->file_names
[file_index
].included_p
== 1)
21323 gdb::unique_xmalloc_ptr
<char> name_holder
;
21324 const char *include_name
=
21325 psymtab_include_file_name (lh
, file_index
, pst
, comp_dir
,
21327 if (include_name
!= NULL
)
21328 dwarf2_create_include_psymtab (include_name
, pst
, objfile
);
21333 /* Make sure a symtab is created for every file, even files
21334 which contain only variables (i.e. no code with associated
21336 buildsym_compunit
*builder
= cu
->get_builder ();
21337 struct compunit_symtab
*cust
= builder
->get_compunit_symtab ();
21340 for (i
= 0; i
< lh
->file_names
.size (); i
++)
21342 file_entry
&fe
= lh
->file_names
[i
];
21344 dwarf2_start_subfile (cu
, fe
.name
, fe
.include_dir (lh
));
21346 if (builder
->get_current_subfile ()->symtab
== NULL
)
21348 builder
->get_current_subfile ()->symtab
21349 = allocate_symtab (cust
,
21350 builder
->get_current_subfile ()->name
);
21352 fe
.symtab
= builder
->get_current_subfile ()->symtab
;
21357 /* Start a subfile for DWARF. FILENAME is the name of the file and
21358 DIRNAME the name of the source directory which contains FILENAME
21359 or NULL if not known.
21360 This routine tries to keep line numbers from identical absolute and
21361 relative file names in a common subfile.
21363 Using the `list' example from the GDB testsuite, which resides in
21364 /srcdir and compiling it with Irix6.2 cc in /compdir using a filename
21365 of /srcdir/list0.c yields the following debugging information for list0.c:
21367 DW_AT_name: /srcdir/list0.c
21368 DW_AT_comp_dir: /compdir
21369 files.files[0].name: list0.h
21370 files.files[0].dir: /srcdir
21371 files.files[1].name: list0.c
21372 files.files[1].dir: /srcdir
21374 The line number information for list0.c has to end up in a single
21375 subfile, so that `break /srcdir/list0.c:1' works as expected.
21376 start_subfile will ensure that this happens provided that we pass the
21377 concatenation of files.files[1].dir and files.files[1].name as the
21381 dwarf2_start_subfile (struct dwarf2_cu
*cu
, const char *filename
,
21382 const char *dirname
)
21386 /* In order not to lose the line information directory,
21387 we concatenate it to the filename when it makes sense.
21388 Note that the Dwarf3 standard says (speaking of filenames in line
21389 information): ``The directory index is ignored for file names
21390 that represent full path names''. Thus ignoring dirname in the
21391 `else' branch below isn't an issue. */
21393 if (!IS_ABSOLUTE_PATH (filename
) && dirname
!= NULL
)
21395 copy
= concat (dirname
, SLASH_STRING
, filename
, (char *)NULL
);
21399 cu
->get_builder ()->start_subfile (filename
);
21405 /* Start a symtab for DWARF. NAME, COMP_DIR, LOW_PC are passed to the
21406 buildsym_compunit constructor. */
21408 struct compunit_symtab
*
21409 dwarf2_cu::start_symtab (const char *name
, const char *comp_dir
,
21412 gdb_assert (m_builder
== nullptr);
21414 m_builder
.reset (new struct buildsym_compunit
21415 (per_cu
->dwarf2_per_objfile
->objfile
,
21416 name
, comp_dir
, language
, low_pc
));
21418 list_in_scope
= get_builder ()->get_file_symbols ();
21420 get_builder ()->record_debugformat ("DWARF 2");
21421 get_builder ()->record_producer (producer
);
21423 processing_has_namespace_info
= false;
21425 return get_builder ()->get_compunit_symtab ();
21429 var_decode_location (struct attribute
*attr
, struct symbol
*sym
,
21430 struct dwarf2_cu
*cu
)
21432 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21433 struct comp_unit_head
*cu_header
= &cu
->header
;
21435 /* NOTE drow/2003-01-30: There used to be a comment and some special
21436 code here to turn a symbol with DW_AT_external and a
21437 SYMBOL_VALUE_ADDRESS of 0 into a LOC_UNRESOLVED symbol. This was
21438 necessary for platforms (maybe Alpha, certainly PowerPC GNU/Linux
21439 with some versions of binutils) where shared libraries could have
21440 relocations against symbols in their debug information - the
21441 minimal symbol would have the right address, but the debug info
21442 would not. It's no longer necessary, because we will explicitly
21443 apply relocations when we read in the debug information now. */
21445 /* A DW_AT_location attribute with no contents indicates that a
21446 variable has been optimized away. */
21447 if (attr_form_is_block (attr
) && DW_BLOCK (attr
)->size
== 0)
21449 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21453 /* Handle one degenerate form of location expression specially, to
21454 preserve GDB's previous behavior when section offsets are
21455 specified. If this is just a DW_OP_addr, DW_OP_addrx, or
21456 DW_OP_GNU_addr_index then mark this symbol as LOC_STATIC. */
21458 if (attr_form_is_block (attr
)
21459 && ((DW_BLOCK (attr
)->data
[0] == DW_OP_addr
21460 && DW_BLOCK (attr
)->size
== 1 + cu_header
->addr_size
)
21461 || ((DW_BLOCK (attr
)->data
[0] == DW_OP_GNU_addr_index
21462 || DW_BLOCK (attr
)->data
[0] == DW_OP_addrx
)
21463 && (DW_BLOCK (attr
)->size
21464 == 1 + leb128_size (&DW_BLOCK (attr
)->data
[1])))))
21466 unsigned int dummy
;
21468 if (DW_BLOCK (attr
)->data
[0] == DW_OP_addr
)
21469 SYMBOL_VALUE_ADDRESS (sym
) =
21470 read_address (objfile
->obfd
, DW_BLOCK (attr
)->data
+ 1, cu
, &dummy
);
21472 SYMBOL_VALUE_ADDRESS (sym
) =
21473 read_addr_index_from_leb128 (cu
, DW_BLOCK (attr
)->data
+ 1, &dummy
);
21474 SYMBOL_ACLASS_INDEX (sym
) = LOC_STATIC
;
21475 fixup_symbol_section (sym
, objfile
);
21476 SYMBOL_VALUE_ADDRESS (sym
) += ANOFFSET (objfile
->section_offsets
,
21477 SYMBOL_SECTION (sym
));
21481 /* NOTE drow/2002-01-30: It might be worthwhile to have a static
21482 expression evaluator, and use LOC_COMPUTED only when necessary
21483 (i.e. when the value of a register or memory location is
21484 referenced, or a thread-local block, etc.). Then again, it might
21485 not be worthwhile. I'm assuming that it isn't unless performance
21486 or memory numbers show me otherwise. */
21488 dwarf2_symbol_mark_computed (attr
, sym
, cu
, 0);
21490 if (SYMBOL_COMPUTED_OPS (sym
)->location_has_loclist
)
21491 cu
->has_loclist
= true;
21494 /* Given a pointer to a DWARF information entry, figure out if we need
21495 to make a symbol table entry for it, and if so, create a new entry
21496 and return a pointer to it.
21497 If TYPE is NULL, determine symbol type from the die, otherwise
21498 used the passed type.
21499 If SPACE is not NULL, use it to hold the new symbol. If it is
21500 NULL, allocate a new symbol on the objfile's obstack. */
21502 static struct symbol
*
21503 new_symbol (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
,
21504 struct symbol
*space
)
21506 struct dwarf2_per_objfile
*dwarf2_per_objfile
21507 = cu
->per_cu
->dwarf2_per_objfile
;
21508 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
21509 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
21510 struct symbol
*sym
= NULL
;
21512 struct attribute
*attr
= NULL
;
21513 struct attribute
*attr2
= NULL
;
21514 CORE_ADDR baseaddr
;
21515 struct pending
**list_to_add
= NULL
;
21517 int inlined_func
= (die
->tag
== DW_TAG_inlined_subroutine
);
21519 baseaddr
= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
21521 name
= dwarf2_name (die
, cu
);
21524 const char *linkagename
;
21525 int suppress_add
= 0;
21530 sym
= allocate_symbol (objfile
);
21531 OBJSTAT (objfile
, n_syms
++);
21533 /* Cache this symbol's name and the name's demangled form (if any). */
21534 SYMBOL_SET_LANGUAGE (sym
, cu
->language
, &objfile
->objfile_obstack
);
21535 linkagename
= dwarf2_physname (name
, die
, cu
);
21536 SYMBOL_SET_NAMES (sym
, linkagename
, strlen (linkagename
), 0, objfile
);
21538 /* Fortran does not have mangling standard and the mangling does differ
21539 between gfortran, iFort etc. */
21540 if (cu
->language
== language_fortran
21541 && symbol_get_demangled_name (&(sym
->ginfo
)) == NULL
)
21542 symbol_set_demangled_name (&(sym
->ginfo
),
21543 dwarf2_full_name (name
, die
, cu
),
21546 /* Default assumptions.
21547 Use the passed type or decode it from the die. */
21548 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21549 SYMBOL_ACLASS_INDEX (sym
) = LOC_OPTIMIZED_OUT
;
21551 SYMBOL_TYPE (sym
) = type
;
21553 SYMBOL_TYPE (sym
) = die_type (die
, cu
);
21554 attr
= dwarf2_attr (die
,
21555 inlined_func
? DW_AT_call_line
: DW_AT_decl_line
,
21559 SYMBOL_LINE (sym
) = DW_UNSND (attr
);
21562 attr
= dwarf2_attr (die
,
21563 inlined_func
? DW_AT_call_file
: DW_AT_decl_file
,
21567 file_name_index file_index
= (file_name_index
) DW_UNSND (attr
);
21568 struct file_entry
*fe
;
21570 if (cu
->line_header
!= NULL
)
21571 fe
= cu
->line_header
->file_name_at (file_index
);
21576 complaint (_("file index out of range"));
21578 symbol_set_symtab (sym
, fe
->symtab
);
21584 attr
= dwarf2_attr (die
, DW_AT_low_pc
, cu
);
21589 addr
= attr_value_as_address (attr
);
21590 addr
= gdbarch_adjust_dwarf2_addr (gdbarch
, addr
+ baseaddr
);
21591 SYMBOL_VALUE_ADDRESS (sym
) = addr
;
21593 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_core_addr
;
21594 SYMBOL_DOMAIN (sym
) = LABEL_DOMAIN
;
21595 SYMBOL_ACLASS_INDEX (sym
) = LOC_LABEL
;
21596 add_symbol_to_list (sym
, cu
->list_in_scope
);
21598 case DW_TAG_subprogram
:
21599 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21601 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21602 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21603 if ((attr2
&& (DW_UNSND (attr2
) != 0))
21604 || cu
->language
== language_ada
)
21606 /* Subprograms marked external are stored as a global symbol.
21607 Ada subprograms, whether marked external or not, are always
21608 stored as a global symbol, because we want to be able to
21609 access them globally. For instance, we want to be able
21610 to break on a nested subprogram without having to
21611 specify the context. */
21612 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21616 list_to_add
= cu
->list_in_scope
;
21619 case DW_TAG_inlined_subroutine
:
21620 /* SYMBOL_BLOCK_VALUE (sym) will be filled in later by
21622 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
21623 SYMBOL_INLINED (sym
) = 1;
21624 list_to_add
= cu
->list_in_scope
;
21626 case DW_TAG_template_value_param
:
21628 /* Fall through. */
21629 case DW_TAG_constant
:
21630 case DW_TAG_variable
:
21631 case DW_TAG_member
:
21632 /* Compilation with minimal debug info may result in
21633 variables with missing type entries. Change the
21634 misleading `void' type to something sensible. */
21635 if (TYPE_CODE (SYMBOL_TYPE (sym
)) == TYPE_CODE_VOID
)
21636 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->builtin_int
;
21638 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21639 /* In the case of DW_TAG_member, we should only be called for
21640 static const members. */
21641 if (die
->tag
== DW_TAG_member
)
21643 /* dwarf2_add_field uses die_is_declaration,
21644 so we do the same. */
21645 gdb_assert (die_is_declaration (die
, cu
));
21650 dwarf2_const_value (attr
, sym
, cu
);
21651 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21654 if (attr2
&& (DW_UNSND (attr2
) != 0))
21655 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21657 list_to_add
= cu
->list_in_scope
;
21661 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21664 var_decode_location (attr
, sym
, cu
);
21665 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21667 /* Fortran explicitly imports any global symbols to the local
21668 scope by DW_TAG_common_block. */
21669 if (cu
->language
== language_fortran
&& die
->parent
21670 && die
->parent
->tag
== DW_TAG_common_block
)
21673 if (SYMBOL_CLASS (sym
) == LOC_STATIC
21674 && SYMBOL_VALUE_ADDRESS (sym
) == 0
21675 && !dwarf2_per_objfile
->has_section_at_zero
)
21677 /* When a static variable is eliminated by the linker,
21678 the corresponding debug information is not stripped
21679 out, but the variable address is set to null;
21680 do not add such variables into symbol table. */
21682 else if (attr2
&& (DW_UNSND (attr2
) != 0))
21684 /* Workaround gfortran PR debug/40040 - it uses
21685 DW_AT_location for variables in -fPIC libraries which may
21686 get overriden by other libraries/executable and get
21687 a different address. Resolve it by the minimal symbol
21688 which may come from inferior's executable using copy
21689 relocation. Make this workaround only for gfortran as for
21690 other compilers GDB cannot guess the minimal symbol
21691 Fortran mangling kind. */
21692 if (cu
->language
== language_fortran
&& die
->parent
21693 && die
->parent
->tag
== DW_TAG_module
21695 && startswith (cu
->producer
, "GNU Fortran"))
21696 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21698 /* A variable with DW_AT_external is never static,
21699 but it may be block-scoped. */
21701 = ((cu
->list_in_scope
21702 == cu
->get_builder ()->get_file_symbols ())
21703 ? cu
->get_builder ()->get_global_symbols ()
21704 : cu
->list_in_scope
);
21707 list_to_add
= cu
->list_in_scope
;
21711 /* We do not know the address of this symbol.
21712 If it is an external symbol and we have type information
21713 for it, enter the symbol as a LOC_UNRESOLVED symbol.
21714 The address of the variable will then be determined from
21715 the minimal symbol table whenever the variable is
21717 attr2
= dwarf2_attr (die
, DW_AT_external
, cu
);
21719 /* Fortran explicitly imports any global symbols to the local
21720 scope by DW_TAG_common_block. */
21721 if (cu
->language
== language_fortran
&& die
->parent
21722 && die
->parent
->tag
== DW_TAG_common_block
)
21724 /* SYMBOL_CLASS doesn't matter here because
21725 read_common_block is going to reset it. */
21727 list_to_add
= cu
->list_in_scope
;
21729 else if (attr2
&& (DW_UNSND (attr2
) != 0)
21730 && dwarf2_attr (die
, DW_AT_type
, cu
) != NULL
)
21732 /* A variable with DW_AT_external is never static, but it
21733 may be block-scoped. */
21735 = ((cu
->list_in_scope
21736 == cu
->get_builder ()->get_file_symbols ())
21737 ? cu
->get_builder ()->get_global_symbols ()
21738 : cu
->list_in_scope
);
21740 SYMBOL_ACLASS_INDEX (sym
) = LOC_UNRESOLVED
;
21742 else if (!die_is_declaration (die
, cu
))
21744 /* Use the default LOC_OPTIMIZED_OUT class. */
21745 gdb_assert (SYMBOL_CLASS (sym
) == LOC_OPTIMIZED_OUT
);
21747 list_to_add
= cu
->list_in_scope
;
21751 case DW_TAG_formal_parameter
:
21753 /* If we are inside a function, mark this as an argument. If
21754 not, we might be looking at an argument to an inlined function
21755 when we do not have enough information to show inlined frames;
21756 pretend it's a local variable in that case so that the user can
21758 struct context_stack
*curr
21759 = cu
->get_builder ()->get_current_context_stack ();
21760 if (curr
!= nullptr && curr
->name
!= nullptr)
21761 SYMBOL_IS_ARGUMENT (sym
) = 1;
21762 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
21765 var_decode_location (attr
, sym
, cu
);
21767 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21770 dwarf2_const_value (attr
, sym
, cu
);
21773 list_to_add
= cu
->list_in_scope
;
21776 case DW_TAG_unspecified_parameters
:
21777 /* From varargs functions; gdb doesn't seem to have any
21778 interest in this information, so just ignore it for now.
21781 case DW_TAG_template_type_param
:
21783 /* Fall through. */
21784 case DW_TAG_class_type
:
21785 case DW_TAG_interface_type
:
21786 case DW_TAG_structure_type
:
21787 case DW_TAG_union_type
:
21788 case DW_TAG_set_type
:
21789 case DW_TAG_enumeration_type
:
21790 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21791 SYMBOL_DOMAIN (sym
) = STRUCT_DOMAIN
;
21794 /* NOTE: carlton/2003-11-10: C++ class symbols shouldn't
21795 really ever be static objects: otherwise, if you try
21796 to, say, break of a class's method and you're in a file
21797 which doesn't mention that class, it won't work unless
21798 the check for all static symbols in lookup_symbol_aux
21799 saves you. See the OtherFileClass tests in
21800 gdb.c++/namespace.exp. */
21804 buildsym_compunit
*builder
= cu
->get_builder ();
21806 = (cu
->list_in_scope
== builder
->get_file_symbols ()
21807 && cu
->language
== language_cplus
21808 ? builder
->get_global_symbols ()
21809 : cu
->list_in_scope
);
21811 /* The semantics of C++ state that "struct foo {
21812 ... }" also defines a typedef for "foo". */
21813 if (cu
->language
== language_cplus
21814 || cu
->language
== language_ada
21815 || cu
->language
== language_d
21816 || cu
->language
== language_rust
)
21818 /* The symbol's name is already allocated along
21819 with this objfile, so we don't need to
21820 duplicate it for the type. */
21821 if (TYPE_NAME (SYMBOL_TYPE (sym
)) == 0)
21822 TYPE_NAME (SYMBOL_TYPE (sym
)) = SYMBOL_SEARCH_NAME (sym
);
21827 case DW_TAG_typedef
:
21828 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21829 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21830 list_to_add
= cu
->list_in_scope
;
21832 case DW_TAG_base_type
:
21833 case DW_TAG_subrange_type
:
21834 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21835 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
21836 list_to_add
= cu
->list_in_scope
;
21838 case DW_TAG_enumerator
:
21839 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
21842 dwarf2_const_value (attr
, sym
, cu
);
21845 /* NOTE: carlton/2003-11-10: See comment above in the
21846 DW_TAG_class_type, etc. block. */
21849 = (cu
->list_in_scope
== cu
->get_builder ()->get_file_symbols ()
21850 && cu
->language
== language_cplus
21851 ? cu
->get_builder ()->get_global_symbols ()
21852 : cu
->list_in_scope
);
21855 case DW_TAG_imported_declaration
:
21856 case DW_TAG_namespace
:
21857 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21858 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21860 case DW_TAG_module
:
21861 SYMBOL_ACLASS_INDEX (sym
) = LOC_TYPEDEF
;
21862 SYMBOL_DOMAIN (sym
) = MODULE_DOMAIN
;
21863 list_to_add
= cu
->get_builder ()->get_global_symbols ();
21865 case DW_TAG_common_block
:
21866 SYMBOL_ACLASS_INDEX (sym
) = LOC_COMMON_BLOCK
;
21867 SYMBOL_DOMAIN (sym
) = COMMON_BLOCK_DOMAIN
;
21868 add_symbol_to_list (sym
, cu
->list_in_scope
);
21871 /* Not a tag we recognize. Hopefully we aren't processing
21872 trash data, but since we must specifically ignore things
21873 we don't recognize, there is nothing else we should do at
21875 complaint (_("unsupported tag: '%s'"),
21876 dwarf_tag_name (die
->tag
));
21882 sym
->hash_next
= objfile
->template_symbols
;
21883 objfile
->template_symbols
= sym
;
21884 list_to_add
= NULL
;
21887 if (list_to_add
!= NULL
)
21888 add_symbol_to_list (sym
, list_to_add
);
21890 /* For the benefit of old versions of GCC, check for anonymous
21891 namespaces based on the demangled name. */
21892 if (!cu
->processing_has_namespace_info
21893 && cu
->language
== language_cplus
)
21894 cp_scan_for_anonymous_namespaces (cu
->get_builder (), sym
, objfile
);
21899 /* Given an attr with a DW_FORM_dataN value in host byte order,
21900 zero-extend it as appropriate for the symbol's type. The DWARF
21901 standard (v4) is not entirely clear about the meaning of using
21902 DW_FORM_dataN for a constant with a signed type, where the type is
21903 wider than the data. The conclusion of a discussion on the DWARF
21904 list was that this is unspecified. We choose to always zero-extend
21905 because that is the interpretation long in use by GCC. */
21908 dwarf2_const_value_data (const struct attribute
*attr
, struct obstack
*obstack
,
21909 struct dwarf2_cu
*cu
, LONGEST
*value
, int bits
)
21911 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21912 enum bfd_endian byte_order
= bfd_big_endian (objfile
->obfd
) ?
21913 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
;
21914 LONGEST l
= DW_UNSND (attr
);
21916 if (bits
< sizeof (*value
) * 8)
21918 l
&= ((LONGEST
) 1 << bits
) - 1;
21921 else if (bits
== sizeof (*value
) * 8)
21925 gdb_byte
*bytes
= (gdb_byte
*) obstack_alloc (obstack
, bits
/ 8);
21926 store_unsigned_integer (bytes
, bits
/ 8, byte_order
, l
);
21933 /* Read a constant value from an attribute. Either set *VALUE, or if
21934 the value does not fit in *VALUE, set *BYTES - either already
21935 allocated on the objfile obstack, or newly allocated on OBSTACK,
21936 or, set *BATON, if we translated the constant to a location
21940 dwarf2_const_value_attr (const struct attribute
*attr
, struct type
*type
,
21941 const char *name
, struct obstack
*obstack
,
21942 struct dwarf2_cu
*cu
,
21943 LONGEST
*value
, const gdb_byte
**bytes
,
21944 struct dwarf2_locexpr_baton
**baton
)
21946 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
21947 struct comp_unit_head
*cu_header
= &cu
->header
;
21948 struct dwarf_block
*blk
;
21949 enum bfd_endian byte_order
= (bfd_big_endian (objfile
->obfd
) ?
21950 BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
21956 switch (attr
->form
)
21959 case DW_FORM_addrx
:
21960 case DW_FORM_GNU_addr_index
:
21964 if (TYPE_LENGTH (type
) != cu_header
->addr_size
)
21965 dwarf2_const_value_length_mismatch_complaint (name
,
21966 cu_header
->addr_size
,
21967 TYPE_LENGTH (type
));
21968 /* Symbols of this form are reasonably rare, so we just
21969 piggyback on the existing location code rather than writing
21970 a new implementation of symbol_computed_ops. */
21971 *baton
= XOBNEW (obstack
, struct dwarf2_locexpr_baton
);
21972 (*baton
)->per_cu
= cu
->per_cu
;
21973 gdb_assert ((*baton
)->per_cu
);
21975 (*baton
)->size
= 2 + cu_header
->addr_size
;
21976 data
= (gdb_byte
*) obstack_alloc (obstack
, (*baton
)->size
);
21977 (*baton
)->data
= data
;
21979 data
[0] = DW_OP_addr
;
21980 store_unsigned_integer (&data
[1], cu_header
->addr_size
,
21981 byte_order
, DW_ADDR (attr
));
21982 data
[cu_header
->addr_size
+ 1] = DW_OP_stack_value
;
21985 case DW_FORM_string
:
21988 case DW_FORM_GNU_str_index
:
21989 case DW_FORM_GNU_strp_alt
:
21990 /* DW_STRING is already allocated on the objfile obstack, point
21992 *bytes
= (const gdb_byte
*) DW_STRING (attr
);
21994 case DW_FORM_block1
:
21995 case DW_FORM_block2
:
21996 case DW_FORM_block4
:
21997 case DW_FORM_block
:
21998 case DW_FORM_exprloc
:
21999 case DW_FORM_data16
:
22000 blk
= DW_BLOCK (attr
);
22001 if (TYPE_LENGTH (type
) != blk
->size
)
22002 dwarf2_const_value_length_mismatch_complaint (name
, blk
->size
,
22003 TYPE_LENGTH (type
));
22004 *bytes
= blk
->data
;
22007 /* The DW_AT_const_value attributes are supposed to carry the
22008 symbol's value "represented as it would be on the target
22009 architecture." By the time we get here, it's already been
22010 converted to host endianness, so we just need to sign- or
22011 zero-extend it as appropriate. */
22012 case DW_FORM_data1
:
22013 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 8);
22015 case DW_FORM_data2
:
22016 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 16);
22018 case DW_FORM_data4
:
22019 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 32);
22021 case DW_FORM_data8
:
22022 *bytes
= dwarf2_const_value_data (attr
, obstack
, cu
, value
, 64);
22025 case DW_FORM_sdata
:
22026 case DW_FORM_implicit_const
:
22027 *value
= DW_SND (attr
);
22030 case DW_FORM_udata
:
22031 *value
= DW_UNSND (attr
);
22035 complaint (_("unsupported const value attribute form: '%s'"),
22036 dwarf_form_name (attr
->form
));
22043 /* Copy constant value from an attribute to a symbol. */
22046 dwarf2_const_value (const struct attribute
*attr
, struct symbol
*sym
,
22047 struct dwarf2_cu
*cu
)
22049 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22051 const gdb_byte
*bytes
;
22052 struct dwarf2_locexpr_baton
*baton
;
22054 dwarf2_const_value_attr (attr
, SYMBOL_TYPE (sym
),
22055 SYMBOL_PRINT_NAME (sym
),
22056 &objfile
->objfile_obstack
, cu
,
22057 &value
, &bytes
, &baton
);
22061 SYMBOL_LOCATION_BATON (sym
) = baton
;
22062 SYMBOL_ACLASS_INDEX (sym
) = dwarf2_locexpr_index
;
22064 else if (bytes
!= NULL
)
22066 SYMBOL_VALUE_BYTES (sym
) = bytes
;
22067 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST_BYTES
;
22071 SYMBOL_VALUE (sym
) = value
;
22072 SYMBOL_ACLASS_INDEX (sym
) = LOC_CONST
;
22076 /* Return the type of the die in question using its DW_AT_type attribute. */
22078 static struct type
*
22079 die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22081 struct attribute
*type_attr
;
22083 type_attr
= dwarf2_attr (die
, DW_AT_type
, cu
);
22086 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22087 /* A missing DW_AT_type represents a void type. */
22088 return objfile_type (objfile
)->builtin_void
;
22091 return lookup_die_type (die
, type_attr
, cu
);
22094 /* True iff CU's producer generates GNAT Ada auxiliary information
22095 that allows to find parallel types through that information instead
22096 of having to do expensive parallel lookups by type name. */
22099 need_gnat_info (struct dwarf2_cu
*cu
)
22101 /* Assume that the Ada compiler was GNAT, which always produces
22102 the auxiliary information. */
22103 return (cu
->language
== language_ada
);
22106 /* Return the auxiliary type of the die in question using its
22107 DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
22108 attribute is not present. */
22110 static struct type
*
22111 die_descriptive_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22113 struct attribute
*type_attr
;
22115 type_attr
= dwarf2_attr (die
, DW_AT_GNAT_descriptive_type
, cu
);
22119 return lookup_die_type (die
, type_attr
, cu
);
22122 /* If DIE has a descriptive_type attribute, then set the TYPE's
22123 descriptive type accordingly. */
22126 set_descriptive_type (struct type
*type
, struct die_info
*die
,
22127 struct dwarf2_cu
*cu
)
22129 struct type
*descriptive_type
= die_descriptive_type (die
, cu
);
22131 if (descriptive_type
)
22133 ALLOCATE_GNAT_AUX_TYPE (type
);
22134 TYPE_DESCRIPTIVE_TYPE (type
) = descriptive_type
;
22138 /* Return the containing type of the die in question using its
22139 DW_AT_containing_type attribute. */
22141 static struct type
*
22142 die_containing_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
22144 struct attribute
*type_attr
;
22145 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22147 type_attr
= dwarf2_attr (die
, DW_AT_containing_type
, cu
);
22149 error (_("Dwarf Error: Problem turning containing type into gdb type "
22150 "[in module %s]"), objfile_name (objfile
));
22152 return lookup_die_type (die
, type_attr
, cu
);
22155 /* Return an error marker type to use for the ill formed type in DIE/CU. */
22157 static struct type
*
22158 build_error_marker_type (struct dwarf2_cu
*cu
, struct die_info
*die
)
22160 struct dwarf2_per_objfile
*dwarf2_per_objfile
22161 = cu
->per_cu
->dwarf2_per_objfile
;
22162 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22165 std::string message
22166 = string_printf (_("<unknown type in %s, CU %s, DIE %s>"),
22167 objfile_name (objfile
),
22168 sect_offset_str (cu
->header
.sect_off
),
22169 sect_offset_str (die
->sect_off
));
22170 saved
= (char *) obstack_copy0 (&objfile
->objfile_obstack
,
22171 message
.c_str (), message
.length ());
22173 return init_type (objfile
, TYPE_CODE_ERROR
, 0, saved
);
22176 /* Look up the type of DIE in CU using its type attribute ATTR.
22177 ATTR must be one of: DW_AT_type, DW_AT_GNAT_descriptive_type,
22178 DW_AT_containing_type.
22179 If there is no type substitute an error marker. */
22181 static struct type
*
22182 lookup_die_type (struct die_info
*die
, const struct attribute
*attr
,
22183 struct dwarf2_cu
*cu
)
22185 struct dwarf2_per_objfile
*dwarf2_per_objfile
22186 = cu
->per_cu
->dwarf2_per_objfile
;
22187 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
22188 struct type
*this_type
;
22190 gdb_assert (attr
->name
== DW_AT_type
22191 || attr
->name
== DW_AT_GNAT_descriptive_type
22192 || attr
->name
== DW_AT_containing_type
);
22194 /* First see if we have it cached. */
22196 if (attr
->form
== DW_FORM_GNU_ref_alt
)
22198 struct dwarf2_per_cu_data
*per_cu
;
22199 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22201 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, 1,
22202 dwarf2_per_objfile
);
22203 this_type
= get_die_type_at_offset (sect_off
, per_cu
);
22205 else if (attr_form_is_ref (attr
))
22207 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
22209 this_type
= get_die_type_at_offset (sect_off
, cu
->per_cu
);
22211 else if (attr
->form
== DW_FORM_ref_sig8
)
22213 ULONGEST signature
= DW_SIGNATURE (attr
);
22215 return get_signatured_type (die
, signature
, cu
);
22219 complaint (_("Dwarf Error: Bad type attribute %s in DIE"
22220 " at %s [in module %s]"),
22221 dwarf_attr_name (attr
->name
), sect_offset_str (die
->sect_off
),
22222 objfile_name (objfile
));
22223 return build_error_marker_type (cu
, die
);
22226 /* If not cached we need to read it in. */
22228 if (this_type
== NULL
)
22230 struct die_info
*type_die
= NULL
;
22231 struct dwarf2_cu
*type_cu
= cu
;
22233 if (attr_form_is_ref (attr
))
22234 type_die
= follow_die_ref (die
, attr
, &type_cu
);
22235 if (type_die
== NULL
)
22236 return build_error_marker_type (cu
, die
);
22237 /* If we find the type now, it's probably because the type came
22238 from an inter-CU reference and the type's CU got expanded before
22240 this_type
= read_type_die (type_die
, type_cu
);
22243 /* If we still don't have a type use an error marker. */
22245 if (this_type
== NULL
)
22246 return build_error_marker_type (cu
, die
);
22251 /* Return the type in DIE, CU.
22252 Returns NULL for invalid types.
22254 This first does a lookup in die_type_hash,
22255 and only reads the die in if necessary.
22257 NOTE: This can be called when reading in partial or full symbols. */
22259 static struct type
*
22260 read_type_die (struct die_info
*die
, struct dwarf2_cu
*cu
)
22262 struct type
*this_type
;
22264 this_type
= get_die_type (die
, cu
);
22268 return read_type_die_1 (die
, cu
);
22271 /* Read the type in DIE, CU.
22272 Returns NULL for invalid types. */
22274 static struct type
*
22275 read_type_die_1 (struct die_info
*die
, struct dwarf2_cu
*cu
)
22277 struct type
*this_type
= NULL
;
22281 case DW_TAG_class_type
:
22282 case DW_TAG_interface_type
:
22283 case DW_TAG_structure_type
:
22284 case DW_TAG_union_type
:
22285 this_type
= read_structure_type (die
, cu
);
22287 case DW_TAG_enumeration_type
:
22288 this_type
= read_enumeration_type (die
, cu
);
22290 case DW_TAG_subprogram
:
22291 case DW_TAG_subroutine_type
:
22292 case DW_TAG_inlined_subroutine
:
22293 this_type
= read_subroutine_type (die
, cu
);
22295 case DW_TAG_array_type
:
22296 this_type
= read_array_type (die
, cu
);
22298 case DW_TAG_set_type
:
22299 this_type
= read_set_type (die
, cu
);
22301 case DW_TAG_pointer_type
:
22302 this_type
= read_tag_pointer_type (die
, cu
);
22304 case DW_TAG_ptr_to_member_type
:
22305 this_type
= read_tag_ptr_to_member_type (die
, cu
);
22307 case DW_TAG_reference_type
:
22308 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_REF
);
22310 case DW_TAG_rvalue_reference_type
:
22311 this_type
= read_tag_reference_type (die
, cu
, TYPE_CODE_RVALUE_REF
);
22313 case DW_TAG_const_type
:
22314 this_type
= read_tag_const_type (die
, cu
);
22316 case DW_TAG_volatile_type
:
22317 this_type
= read_tag_volatile_type (die
, cu
);
22319 case DW_TAG_restrict_type
:
22320 this_type
= read_tag_restrict_type (die
, cu
);
22322 case DW_TAG_string_type
:
22323 this_type
= read_tag_string_type (die
, cu
);
22325 case DW_TAG_typedef
:
22326 this_type
= read_typedef (die
, cu
);
22328 case DW_TAG_subrange_type
:
22329 this_type
= read_subrange_type (die
, cu
);
22331 case DW_TAG_base_type
:
22332 this_type
= read_base_type (die
, cu
);
22334 case DW_TAG_unspecified_type
:
22335 this_type
= read_unspecified_type (die
, cu
);
22337 case DW_TAG_namespace
:
22338 this_type
= read_namespace_type (die
, cu
);
22340 case DW_TAG_module
:
22341 this_type
= read_module_type (die
, cu
);
22343 case DW_TAG_atomic_type
:
22344 this_type
= read_tag_atomic_type (die
, cu
);
22347 complaint (_("unexpected tag in read_type_die: '%s'"),
22348 dwarf_tag_name (die
->tag
));
22355 /* See if we can figure out if the class lives in a namespace. We do
22356 this by looking for a member function; its demangled name will
22357 contain namespace info, if there is any.
22358 Return the computed name or NULL.
22359 Space for the result is allocated on the objfile's obstack.
22360 This is the full-die version of guess_partial_die_structure_name.
22361 In this case we know DIE has no useful parent. */
22364 guess_full_die_structure_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22366 struct die_info
*spec_die
;
22367 struct dwarf2_cu
*spec_cu
;
22368 struct die_info
*child
;
22369 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22372 spec_die
= die_specification (die
, &spec_cu
);
22373 if (spec_die
!= NULL
)
22379 for (child
= die
->child
;
22381 child
= child
->sibling
)
22383 if (child
->tag
== DW_TAG_subprogram
)
22385 const char *linkage_name
= dw2_linkage_name (child
, cu
);
22387 if (linkage_name
!= NULL
)
22390 = language_class_name_from_physname (cu
->language_defn
,
22394 if (actual_name
!= NULL
)
22396 const char *die_name
= dwarf2_name (die
, cu
);
22398 if (die_name
!= NULL
22399 && strcmp (die_name
, actual_name
) != 0)
22401 /* Strip off the class name from the full name.
22402 We want the prefix. */
22403 int die_name_len
= strlen (die_name
);
22404 int actual_name_len
= strlen (actual_name
);
22406 /* Test for '::' as a sanity check. */
22407 if (actual_name_len
> die_name_len
+ 2
22408 && actual_name
[actual_name_len
22409 - die_name_len
- 1] == ':')
22410 name
= (char *) obstack_copy0 (
22411 &objfile
->per_bfd
->storage_obstack
,
22412 actual_name
, actual_name_len
- die_name_len
- 2);
22415 xfree (actual_name
);
22424 /* GCC might emit a nameless typedef that has a linkage name. Determine the
22425 prefix part in such case. See
22426 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22428 static const char *
22429 anonymous_struct_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22431 struct attribute
*attr
;
22434 if (die
->tag
!= DW_TAG_class_type
&& die
->tag
!= DW_TAG_interface_type
22435 && die
->tag
!= DW_TAG_structure_type
&& die
->tag
!= DW_TAG_union_type
)
22438 if (dwarf2_string_attr (die
, DW_AT_name
, cu
) != NULL
)
22441 attr
= dw2_linkage_name_attr (die
, cu
);
22442 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22445 /* dwarf2_name had to be already called. */
22446 gdb_assert (DW_STRING_IS_CANONICAL (attr
));
22448 /* Strip the base name, keep any leading namespaces/classes. */
22449 base
= strrchr (DW_STRING (attr
), ':');
22450 if (base
== NULL
|| base
== DW_STRING (attr
) || base
[-1] != ':')
22453 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22454 return (char *) obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22456 &base
[-1] - DW_STRING (attr
));
22459 /* Return the name of the namespace/class that DIE is defined within,
22460 or "" if we can't tell. The caller should not xfree the result.
22462 For example, if we're within the method foo() in the following
22472 then determine_prefix on foo's die will return "N::C". */
22474 static const char *
22475 determine_prefix (struct die_info
*die
, struct dwarf2_cu
*cu
)
22477 struct dwarf2_per_objfile
*dwarf2_per_objfile
22478 = cu
->per_cu
->dwarf2_per_objfile
;
22479 struct die_info
*parent
, *spec_die
;
22480 struct dwarf2_cu
*spec_cu
;
22481 struct type
*parent_type
;
22482 const char *retval
;
22484 if (cu
->language
!= language_cplus
22485 && cu
->language
!= language_fortran
&& cu
->language
!= language_d
22486 && cu
->language
!= language_rust
)
22489 retval
= anonymous_struct_prefix (die
, cu
);
22493 /* We have to be careful in the presence of DW_AT_specification.
22494 For example, with GCC 3.4, given the code
22498 // Definition of N::foo.
22502 then we'll have a tree of DIEs like this:
22504 1: DW_TAG_compile_unit
22505 2: DW_TAG_namespace // N
22506 3: DW_TAG_subprogram // declaration of N::foo
22507 4: DW_TAG_subprogram // definition of N::foo
22508 DW_AT_specification // refers to die #3
22510 Thus, when processing die #4, we have to pretend that we're in
22511 the context of its DW_AT_specification, namely the contex of die
22514 spec_die
= die_specification (die
, &spec_cu
);
22515 if (spec_die
== NULL
)
22516 parent
= die
->parent
;
22519 parent
= spec_die
->parent
;
22523 if (parent
== NULL
)
22525 else if (parent
->building_fullname
)
22528 const char *parent_name
;
22530 /* It has been seen on RealView 2.2 built binaries,
22531 DW_TAG_template_type_param types actually _defined_ as
22532 children of the parent class:
22535 template class <class Enum> Class{};
22536 Class<enum E> class_e;
22538 1: DW_TAG_class_type (Class)
22539 2: DW_TAG_enumeration_type (E)
22540 3: DW_TAG_enumerator (enum1:0)
22541 3: DW_TAG_enumerator (enum2:1)
22543 2: DW_TAG_template_type_param
22544 DW_AT_type DW_FORM_ref_udata (E)
22546 Besides being broken debug info, it can put GDB into an
22547 infinite loop. Consider:
22549 When we're building the full name for Class<E>, we'll start
22550 at Class, and go look over its template type parameters,
22551 finding E. We'll then try to build the full name of E, and
22552 reach here. We're now trying to build the full name of E,
22553 and look over the parent DIE for containing scope. In the
22554 broken case, if we followed the parent DIE of E, we'd again
22555 find Class, and once again go look at its template type
22556 arguments, etc., etc. Simply don't consider such parent die
22557 as source-level parent of this die (it can't be, the language
22558 doesn't allow it), and break the loop here. */
22559 name
= dwarf2_name (die
, cu
);
22560 parent_name
= dwarf2_name (parent
, cu
);
22561 complaint (_("template param type '%s' defined within parent '%s'"),
22562 name
? name
: "<unknown>",
22563 parent_name
? parent_name
: "<unknown>");
22567 switch (parent
->tag
)
22569 case DW_TAG_namespace
:
22570 parent_type
= read_type_die (parent
, cu
);
22571 /* GCC 4.0 and 4.1 had a bug (PR c++/28460) where they generated bogus
22572 DW_TAG_namespace DIEs with a name of "::" for the global namespace.
22573 Work around this problem here. */
22574 if (cu
->language
== language_cplus
22575 && strcmp (TYPE_NAME (parent_type
), "::") == 0)
22577 /* We give a name to even anonymous namespaces. */
22578 return TYPE_NAME (parent_type
);
22579 case DW_TAG_class_type
:
22580 case DW_TAG_interface_type
:
22581 case DW_TAG_structure_type
:
22582 case DW_TAG_union_type
:
22583 case DW_TAG_module
:
22584 parent_type
= read_type_die (parent
, cu
);
22585 if (TYPE_NAME (parent_type
) != NULL
)
22586 return TYPE_NAME (parent_type
);
22588 /* An anonymous structure is only allowed non-static data
22589 members; no typedefs, no member functions, et cetera.
22590 So it does not need a prefix. */
22592 case DW_TAG_compile_unit
:
22593 case DW_TAG_partial_unit
:
22594 /* gcc-4.5 -gdwarf-4 can drop the enclosing namespace. Cope. */
22595 if (cu
->language
== language_cplus
22596 && !VEC_empty (dwarf2_section_info_def
, dwarf2_per_objfile
->types
)
22597 && die
->child
!= NULL
22598 && (die
->tag
== DW_TAG_class_type
22599 || die
->tag
== DW_TAG_structure_type
22600 || die
->tag
== DW_TAG_union_type
))
22602 char *name
= guess_full_die_structure_name (die
, cu
);
22607 case DW_TAG_enumeration_type
:
22608 parent_type
= read_type_die (parent
, cu
);
22609 if (TYPE_DECLARED_CLASS (parent_type
))
22611 if (TYPE_NAME (parent_type
) != NULL
)
22612 return TYPE_NAME (parent_type
);
22615 /* Fall through. */
22617 return determine_prefix (parent
, cu
);
22621 /* Return a newly-allocated string formed by concatenating PREFIX and SUFFIX
22622 with appropriate separator. If PREFIX or SUFFIX is NULL or empty, then
22623 simply copy the SUFFIX or PREFIX, respectively. If OBS is non-null, perform
22624 an obconcat, otherwise allocate storage for the result. The CU argument is
22625 used to determine the language and hence, the appropriate separator. */
22627 #define MAX_SEP_LEN 7 /* strlen ("__") + strlen ("_MOD_") */
22630 typename_concat (struct obstack
*obs
, const char *prefix
, const char *suffix
,
22631 int physname
, struct dwarf2_cu
*cu
)
22633 const char *lead
= "";
22636 if (suffix
== NULL
|| suffix
[0] == '\0'
22637 || prefix
== NULL
|| prefix
[0] == '\0')
22639 else if (cu
->language
== language_d
)
22641 /* For D, the 'main' function could be defined in any module, but it
22642 should never be prefixed. */
22643 if (strcmp (suffix
, "D main") == 0)
22651 else if (cu
->language
== language_fortran
&& physname
)
22653 /* This is gfortran specific mangling. Normally DW_AT_linkage_name or
22654 DW_AT_MIPS_linkage_name is preferred and used instead. */
22662 if (prefix
== NULL
)
22664 if (suffix
== NULL
)
22671 xmalloc (strlen (prefix
) + MAX_SEP_LEN
+ strlen (suffix
) + 1));
22673 strcpy (retval
, lead
);
22674 strcat (retval
, prefix
);
22675 strcat (retval
, sep
);
22676 strcat (retval
, suffix
);
22681 /* We have an obstack. */
22682 return obconcat (obs
, lead
, prefix
, sep
, suffix
, (char *) NULL
);
22686 /* Return sibling of die, NULL if no sibling. */
22688 static struct die_info
*
22689 sibling_die (struct die_info
*die
)
22691 return die
->sibling
;
22694 /* Get name of a die, return NULL if not found. */
22696 static const char *
22697 dwarf2_canonicalize_name (const char *name
, struct dwarf2_cu
*cu
,
22698 struct obstack
*obstack
)
22700 if (name
&& cu
->language
== language_cplus
)
22702 std::string canon_name
= cp_canonicalize_string (name
);
22704 if (!canon_name
.empty ())
22706 if (canon_name
!= name
)
22707 name
= (const char *) obstack_copy0 (obstack
,
22708 canon_name
.c_str (),
22709 canon_name
.length ());
22716 /* Get name of a die, return NULL if not found.
22717 Anonymous namespaces are converted to their magic string. */
22719 static const char *
22720 dwarf2_name (struct die_info
*die
, struct dwarf2_cu
*cu
)
22722 struct attribute
*attr
;
22723 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
22725 attr
= dwarf2_attr (die
, DW_AT_name
, cu
);
22726 if ((!attr
|| !DW_STRING (attr
))
22727 && die
->tag
!= DW_TAG_namespace
22728 && die
->tag
!= DW_TAG_class_type
22729 && die
->tag
!= DW_TAG_interface_type
22730 && die
->tag
!= DW_TAG_structure_type
22731 && die
->tag
!= DW_TAG_union_type
)
22736 case DW_TAG_compile_unit
:
22737 case DW_TAG_partial_unit
:
22738 /* Compilation units have a DW_AT_name that is a filename, not
22739 a source language identifier. */
22740 case DW_TAG_enumeration_type
:
22741 case DW_TAG_enumerator
:
22742 /* These tags always have simple identifiers already; no need
22743 to canonicalize them. */
22744 return DW_STRING (attr
);
22746 case DW_TAG_namespace
:
22747 if (attr
!= NULL
&& DW_STRING (attr
) != NULL
)
22748 return DW_STRING (attr
);
22749 return CP_ANONYMOUS_NAMESPACE_STR
;
22751 case DW_TAG_class_type
:
22752 case DW_TAG_interface_type
:
22753 case DW_TAG_structure_type
:
22754 case DW_TAG_union_type
:
22755 /* Some GCC versions emit spurious DW_AT_name attributes for unnamed
22756 structures or unions. These were of the form "._%d" in GCC 4.1,
22757 or simply "<anonymous struct>" or "<anonymous union>" in GCC 4.3
22758 and GCC 4.4. We work around this problem by ignoring these. */
22759 if (attr
&& DW_STRING (attr
)
22760 && (startswith (DW_STRING (attr
), "._")
22761 || startswith (DW_STRING (attr
), "<anonymous")))
22764 /* GCC might emit a nameless typedef that has a linkage name. See
22765 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47510. */
22766 if (!attr
|| DW_STRING (attr
) == NULL
)
22768 char *demangled
= NULL
;
22770 attr
= dw2_linkage_name_attr (die
, cu
);
22771 if (attr
== NULL
|| DW_STRING (attr
) == NULL
)
22774 /* Avoid demangling DW_STRING (attr) the second time on a second
22775 call for the same DIE. */
22776 if (!DW_STRING_IS_CANONICAL (attr
))
22777 demangled
= gdb_demangle (DW_STRING (attr
), DMGL_TYPES
);
22783 /* FIXME: we already did this for the partial symbol... */
22786 obstack_copy0 (&objfile
->per_bfd
->storage_obstack
,
22787 demangled
, strlen (demangled
)));
22788 DW_STRING_IS_CANONICAL (attr
) = 1;
22791 /* Strip any leading namespaces/classes, keep only the base name.
22792 DW_AT_name for named DIEs does not contain the prefixes. */
22793 base
= strrchr (DW_STRING (attr
), ':');
22794 if (base
&& base
> DW_STRING (attr
) && base
[-1] == ':')
22797 return DW_STRING (attr
);
22806 if (!DW_STRING_IS_CANONICAL (attr
))
22809 = dwarf2_canonicalize_name (DW_STRING (attr
), cu
,
22810 &objfile
->per_bfd
->storage_obstack
);
22811 DW_STRING_IS_CANONICAL (attr
) = 1;
22813 return DW_STRING (attr
);
22816 /* Return the die that this die in an extension of, or NULL if there
22817 is none. *EXT_CU is the CU containing DIE on input, and the CU
22818 containing the return value on output. */
22820 static struct die_info
*
22821 dwarf2_extension (struct die_info
*die
, struct dwarf2_cu
**ext_cu
)
22823 struct attribute
*attr
;
22825 attr
= dwarf2_attr (die
, DW_AT_extension
, *ext_cu
);
22829 return follow_die_ref (die
, attr
, ext_cu
);
22832 /* Convert a DIE tag into its string name. */
22834 static const char *
22835 dwarf_tag_name (unsigned tag
)
22837 const char *name
= get_DW_TAG_name (tag
);
22840 return "DW_TAG_<unknown>";
22845 /* Convert a DWARF attribute code into its string name. */
22847 static const char *
22848 dwarf_attr_name (unsigned attr
)
22852 #ifdef MIPS /* collides with DW_AT_HP_block_index */
22853 if (attr
== DW_AT_MIPS_fde
)
22854 return "DW_AT_MIPS_fde";
22856 if (attr
== DW_AT_HP_block_index
)
22857 return "DW_AT_HP_block_index";
22860 name
= get_DW_AT_name (attr
);
22863 return "DW_AT_<unknown>";
22868 /* Convert a DWARF value form code into its string name. */
22870 static const char *
22871 dwarf_form_name (unsigned form
)
22873 const char *name
= get_DW_FORM_name (form
);
22876 return "DW_FORM_<unknown>";
22881 static const char *
22882 dwarf_bool_name (unsigned mybool
)
22890 /* Convert a DWARF type code into its string name. */
22892 static const char *
22893 dwarf_type_encoding_name (unsigned enc
)
22895 const char *name
= get_DW_ATE_name (enc
);
22898 return "DW_ATE_<unknown>";
22904 dump_die_shallow (struct ui_file
*f
, int indent
, struct die_info
*die
)
22908 print_spaces (indent
, f
);
22909 fprintf_unfiltered (f
, "Die: %s (abbrev %d, offset %s)\n",
22910 dwarf_tag_name (die
->tag
), die
->abbrev
,
22911 sect_offset_str (die
->sect_off
));
22913 if (die
->parent
!= NULL
)
22915 print_spaces (indent
, f
);
22916 fprintf_unfiltered (f
, " parent at offset: %s\n",
22917 sect_offset_str (die
->parent
->sect_off
));
22920 print_spaces (indent
, f
);
22921 fprintf_unfiltered (f
, " has children: %s\n",
22922 dwarf_bool_name (die
->child
!= NULL
));
22924 print_spaces (indent
, f
);
22925 fprintf_unfiltered (f
, " attributes:\n");
22927 for (i
= 0; i
< die
->num_attrs
; ++i
)
22929 print_spaces (indent
, f
);
22930 fprintf_unfiltered (f
, " %s (%s) ",
22931 dwarf_attr_name (die
->attrs
[i
].name
),
22932 dwarf_form_name (die
->attrs
[i
].form
));
22934 switch (die
->attrs
[i
].form
)
22937 case DW_FORM_addrx
:
22938 case DW_FORM_GNU_addr_index
:
22939 fprintf_unfiltered (f
, "address: ");
22940 fputs_filtered (hex_string (DW_ADDR (&die
->attrs
[i
])), f
);
22942 case DW_FORM_block2
:
22943 case DW_FORM_block4
:
22944 case DW_FORM_block
:
22945 case DW_FORM_block1
:
22946 fprintf_unfiltered (f
, "block: size %s",
22947 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22949 case DW_FORM_exprloc
:
22950 fprintf_unfiltered (f
, "expression: size %s",
22951 pulongest (DW_BLOCK (&die
->attrs
[i
])->size
));
22953 case DW_FORM_data16
:
22954 fprintf_unfiltered (f
, "constant of 16 bytes");
22956 case DW_FORM_ref_addr
:
22957 fprintf_unfiltered (f
, "ref address: ");
22958 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22960 case DW_FORM_GNU_ref_alt
:
22961 fprintf_unfiltered (f
, "alt ref address: ");
22962 fputs_filtered (hex_string (DW_UNSND (&die
->attrs
[i
])), f
);
22968 case DW_FORM_ref_udata
:
22969 fprintf_unfiltered (f
, "constant ref: 0x%lx (adjusted)",
22970 (long) (DW_UNSND (&die
->attrs
[i
])));
22972 case DW_FORM_data1
:
22973 case DW_FORM_data2
:
22974 case DW_FORM_data4
:
22975 case DW_FORM_data8
:
22976 case DW_FORM_udata
:
22977 case DW_FORM_sdata
:
22978 fprintf_unfiltered (f
, "constant: %s",
22979 pulongest (DW_UNSND (&die
->attrs
[i
])));
22981 case DW_FORM_sec_offset
:
22982 fprintf_unfiltered (f
, "section offset: %s",
22983 pulongest (DW_UNSND (&die
->attrs
[i
])));
22985 case DW_FORM_ref_sig8
:
22986 fprintf_unfiltered (f
, "signature: %s",
22987 hex_string (DW_SIGNATURE (&die
->attrs
[i
])));
22989 case DW_FORM_string
:
22991 case DW_FORM_line_strp
:
22993 case DW_FORM_GNU_str_index
:
22994 case DW_FORM_GNU_strp_alt
:
22995 fprintf_unfiltered (f
, "string: \"%s\" (%s canonicalized)",
22996 DW_STRING (&die
->attrs
[i
])
22997 ? DW_STRING (&die
->attrs
[i
]) : "",
22998 DW_STRING_IS_CANONICAL (&die
->attrs
[i
]) ? "is" : "not");
23001 if (DW_UNSND (&die
->attrs
[i
]))
23002 fprintf_unfiltered (f
, "flag: TRUE");
23004 fprintf_unfiltered (f
, "flag: FALSE");
23006 case DW_FORM_flag_present
:
23007 fprintf_unfiltered (f
, "flag: TRUE");
23009 case DW_FORM_indirect
:
23010 /* The reader will have reduced the indirect form to
23011 the "base form" so this form should not occur. */
23012 fprintf_unfiltered (f
,
23013 "unexpected attribute form: DW_FORM_indirect");
23015 case DW_FORM_implicit_const
:
23016 fprintf_unfiltered (f
, "constant: %s",
23017 plongest (DW_SND (&die
->attrs
[i
])));
23020 fprintf_unfiltered (f
, "unsupported attribute form: %d.",
23021 die
->attrs
[i
].form
);
23024 fprintf_unfiltered (f
, "\n");
23029 dump_die_for_error (struct die_info
*die
)
23031 dump_die_shallow (gdb_stderr
, 0, die
);
23035 dump_die_1 (struct ui_file
*f
, int level
, int max_level
, struct die_info
*die
)
23037 int indent
= level
* 4;
23039 gdb_assert (die
!= NULL
);
23041 if (level
>= max_level
)
23044 dump_die_shallow (f
, indent
, die
);
23046 if (die
->child
!= NULL
)
23048 print_spaces (indent
, f
);
23049 fprintf_unfiltered (f
, " Children:");
23050 if (level
+ 1 < max_level
)
23052 fprintf_unfiltered (f
, "\n");
23053 dump_die_1 (f
, level
+ 1, max_level
, die
->child
);
23057 fprintf_unfiltered (f
,
23058 " [not printed, max nesting level reached]\n");
23062 if (die
->sibling
!= NULL
&& level
> 0)
23064 dump_die_1 (f
, level
, max_level
, die
->sibling
);
23068 /* This is called from the pdie macro in gdbinit.in.
23069 It's not static so gcc will keep a copy callable from gdb. */
23072 dump_die (struct die_info
*die
, int max_level
)
23074 dump_die_1 (gdb_stdlog
, 0, max_level
, die
);
23078 store_in_ref_table (struct die_info
*die
, struct dwarf2_cu
*cu
)
23082 slot
= htab_find_slot_with_hash (cu
->die_hash
, die
,
23083 to_underlying (die
->sect_off
),
23089 /* Return DIE offset of ATTR. Return 0 with complaint if ATTR is not of the
23093 dwarf2_get_ref_die_offset (const struct attribute
*attr
)
23095 if (attr_form_is_ref (attr
))
23096 return (sect_offset
) DW_UNSND (attr
);
23098 complaint (_("unsupported die ref attribute form: '%s'"),
23099 dwarf_form_name (attr
->form
));
23103 /* Return the constant value held by ATTR. Return DEFAULT_VALUE if
23104 * the value held by the attribute is not constant. */
23107 dwarf2_get_attr_constant_value (const struct attribute
*attr
, int default_value
)
23109 if (attr
->form
== DW_FORM_sdata
|| attr
->form
== DW_FORM_implicit_const
)
23110 return DW_SND (attr
);
23111 else if (attr
->form
== DW_FORM_udata
23112 || attr
->form
== DW_FORM_data1
23113 || attr
->form
== DW_FORM_data2
23114 || attr
->form
== DW_FORM_data4
23115 || attr
->form
== DW_FORM_data8
)
23116 return DW_UNSND (attr
);
23119 /* For DW_FORM_data16 see attr_form_is_constant. */
23120 complaint (_("Attribute value is not a constant (%s)"),
23121 dwarf_form_name (attr
->form
));
23122 return default_value
;
23126 /* Follow reference or signature attribute ATTR of SRC_DIE.
23127 On entry *REF_CU is the CU of SRC_DIE.
23128 On exit *REF_CU is the CU of the result. */
23130 static struct die_info
*
23131 follow_die_ref_or_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23132 struct dwarf2_cu
**ref_cu
)
23134 struct die_info
*die
;
23136 if (attr_form_is_ref (attr
))
23137 die
= follow_die_ref (src_die
, attr
, ref_cu
);
23138 else if (attr
->form
== DW_FORM_ref_sig8
)
23139 die
= follow_die_sig (src_die
, attr
, ref_cu
);
23142 dump_die_for_error (src_die
);
23143 error (_("Dwarf Error: Expected reference attribute [in module %s]"),
23144 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23150 /* Follow reference OFFSET.
23151 On entry *REF_CU is the CU of the source die referencing OFFSET.
23152 On exit *REF_CU is the CU of the result.
23153 Returns NULL if OFFSET is invalid. */
23155 static struct die_info
*
23156 follow_die_offset (sect_offset sect_off
, int offset_in_dwz
,
23157 struct dwarf2_cu
**ref_cu
)
23159 struct die_info temp_die
;
23160 struct dwarf2_cu
*target_cu
, *cu
= *ref_cu
;
23161 struct dwarf2_per_objfile
*dwarf2_per_objfile
23162 = cu
->per_cu
->dwarf2_per_objfile
;
23164 gdb_assert (cu
->per_cu
!= NULL
);
23168 if (cu
->per_cu
->is_debug_types
)
23170 /* .debug_types CUs cannot reference anything outside their CU.
23171 If they need to, they have to reference a signatured type via
23172 DW_FORM_ref_sig8. */
23173 if (!offset_in_cu_p (&cu
->header
, sect_off
))
23176 else if (offset_in_dwz
!= cu
->per_cu
->is_dwz
23177 || !offset_in_cu_p (&cu
->header
, sect_off
))
23179 struct dwarf2_per_cu_data
*per_cu
;
23181 per_cu
= dwarf2_find_containing_comp_unit (sect_off
, offset_in_dwz
,
23182 dwarf2_per_objfile
);
23184 /* If necessary, add it to the queue and load its DIEs. */
23185 if (maybe_queue_comp_unit (cu
, per_cu
, cu
->language
))
23186 load_full_comp_unit (per_cu
, false, cu
->language
);
23188 target_cu
= per_cu
->cu
;
23190 else if (cu
->dies
== NULL
)
23192 /* We're loading full DIEs during partial symbol reading. */
23193 gdb_assert (dwarf2_per_objfile
->reading_partial_symbols
);
23194 load_full_comp_unit (cu
->per_cu
, false, language_minimal
);
23197 *ref_cu
= target_cu
;
23198 temp_die
.sect_off
= sect_off
;
23200 if (target_cu
!= cu
)
23201 target_cu
->ancestor
= cu
;
23203 return (struct die_info
*) htab_find_with_hash (target_cu
->die_hash
,
23205 to_underlying (sect_off
));
23208 /* Follow reference attribute ATTR of SRC_DIE.
23209 On entry *REF_CU is the CU of SRC_DIE.
23210 On exit *REF_CU is the CU of the result. */
23212 static struct die_info
*
23213 follow_die_ref (struct die_info
*src_die
, const struct attribute
*attr
,
23214 struct dwarf2_cu
**ref_cu
)
23216 sect_offset sect_off
= dwarf2_get_ref_die_offset (attr
);
23217 struct dwarf2_cu
*cu
= *ref_cu
;
23218 struct die_info
*die
;
23220 die
= follow_die_offset (sect_off
,
23221 (attr
->form
== DW_FORM_GNU_ref_alt
23222 || cu
->per_cu
->is_dwz
),
23225 error (_("Dwarf Error: Cannot find DIE at %s referenced from DIE "
23226 "at %s [in module %s]"),
23227 sect_offset_str (sect_off
), sect_offset_str (src_die
->sect_off
),
23228 objfile_name (cu
->per_cu
->dwarf2_per_objfile
->objfile
));
23233 /* Return DWARF block referenced by DW_AT_location of DIE at SECT_OFF at PER_CU.
23234 Returned value is intended for DW_OP_call*. Returned
23235 dwarf2_locexpr_baton->data has lifetime of
23236 PER_CU->DWARF2_PER_OBJFILE->OBJFILE. */
23238 struct dwarf2_locexpr_baton
23239 dwarf2_fetch_die_loc_sect_off (sect_offset sect_off
,
23240 struct dwarf2_per_cu_data
*per_cu
,
23241 CORE_ADDR (*get_frame_pc
) (void *baton
),
23242 void *baton
, bool resolve_abstract_p
)
23244 struct dwarf2_cu
*cu
;
23245 struct die_info
*die
;
23246 struct attribute
*attr
;
23247 struct dwarf2_locexpr_baton retval
;
23248 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
23249 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
23251 if (per_cu
->cu
== NULL
)
23252 load_cu (per_cu
, false);
23256 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23257 Instead just throw an error, not much else we can do. */
23258 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23259 sect_offset_str (sect_off
), objfile_name (objfile
));
23262 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23264 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23265 sect_offset_str (sect_off
), objfile_name (objfile
));
23267 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
23268 if (!attr
&& resolve_abstract_p
23269 && (dwarf2_per_objfile
->abstract_to_concrete
.find (die
)
23270 != dwarf2_per_objfile
->abstract_to_concrete
.end ()))
23272 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
23274 for (const auto &cand
: dwarf2_per_objfile
->abstract_to_concrete
[die
])
23277 || cand
->parent
->tag
!= DW_TAG_subprogram
)
23280 CORE_ADDR pc_low
, pc_high
;
23281 get_scope_pc_bounds (cand
->parent
, &pc_low
, &pc_high
, cu
);
23282 if (pc_low
== ((CORE_ADDR
) -1)
23283 || !(pc_low
<= pc
&& pc
< pc_high
))
23287 attr
= dwarf2_attr (die
, DW_AT_location
, cu
);
23294 /* DWARF: "If there is no such attribute, then there is no effect.".
23295 DATA is ignored if SIZE is 0. */
23297 retval
.data
= NULL
;
23300 else if (attr_form_is_section_offset (attr
))
23302 struct dwarf2_loclist_baton loclist_baton
;
23303 CORE_ADDR pc
= (*get_frame_pc
) (baton
);
23306 fill_in_loclist_baton (cu
, &loclist_baton
, attr
);
23308 retval
.data
= dwarf2_find_location_expression (&loclist_baton
,
23310 retval
.size
= size
;
23314 if (!attr_form_is_block (attr
))
23315 error (_("Dwarf Error: DIE at %s referenced in module %s "
23316 "is neither DW_FORM_block* nor DW_FORM_exprloc"),
23317 sect_offset_str (sect_off
), objfile_name (objfile
));
23319 retval
.data
= DW_BLOCK (attr
)->data
;
23320 retval
.size
= DW_BLOCK (attr
)->size
;
23322 retval
.per_cu
= cu
->per_cu
;
23324 age_cached_comp_units (dwarf2_per_objfile
);
23329 /* Like dwarf2_fetch_die_loc_sect_off, but take a CU
23332 struct dwarf2_locexpr_baton
23333 dwarf2_fetch_die_loc_cu_off (cu_offset offset_in_cu
,
23334 struct dwarf2_per_cu_data
*per_cu
,
23335 CORE_ADDR (*get_frame_pc
) (void *baton
),
23338 sect_offset sect_off
= per_cu
->sect_off
+ to_underlying (offset_in_cu
);
23340 return dwarf2_fetch_die_loc_sect_off (sect_off
, per_cu
, get_frame_pc
, baton
);
23343 /* Write a constant of a given type as target-ordered bytes into
23346 static const gdb_byte
*
23347 write_constant_as_bytes (struct obstack
*obstack
,
23348 enum bfd_endian byte_order
,
23355 *len
= TYPE_LENGTH (type
);
23356 result
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23357 store_unsigned_integer (result
, *len
, byte_order
, value
);
23362 /* If the DIE at OFFSET in PER_CU has a DW_AT_const_value, return a
23363 pointer to the constant bytes and set LEN to the length of the
23364 data. If memory is needed, allocate it on OBSTACK. If the DIE
23365 does not have a DW_AT_const_value, return NULL. */
23368 dwarf2_fetch_constant_bytes (sect_offset sect_off
,
23369 struct dwarf2_per_cu_data
*per_cu
,
23370 struct obstack
*obstack
,
23373 struct dwarf2_cu
*cu
;
23374 struct die_info
*die
;
23375 struct attribute
*attr
;
23376 const gdb_byte
*result
= NULL
;
23379 enum bfd_endian byte_order
;
23380 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
23382 if (per_cu
->cu
== NULL
)
23383 load_cu (per_cu
, false);
23387 /* We shouldn't get here for a dummy CU, but don't crash on the user.
23388 Instead just throw an error, not much else we can do. */
23389 error (_("Dwarf Error: Dummy CU at %s referenced in module %s"),
23390 sect_offset_str (sect_off
), objfile_name (objfile
));
23393 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23395 error (_("Dwarf Error: Cannot find DIE at %s referenced in module %s"),
23396 sect_offset_str (sect_off
), objfile_name (objfile
));
23398 attr
= dwarf2_attr (die
, DW_AT_const_value
, cu
);
23402 byte_order
= (bfd_big_endian (objfile
->obfd
)
23403 ? BFD_ENDIAN_BIG
: BFD_ENDIAN_LITTLE
);
23405 switch (attr
->form
)
23408 case DW_FORM_addrx
:
23409 case DW_FORM_GNU_addr_index
:
23413 *len
= cu
->header
.addr_size
;
23414 tem
= (gdb_byte
*) obstack_alloc (obstack
, *len
);
23415 store_unsigned_integer (tem
, *len
, byte_order
, DW_ADDR (attr
));
23419 case DW_FORM_string
:
23422 case DW_FORM_GNU_str_index
:
23423 case DW_FORM_GNU_strp_alt
:
23424 /* DW_STRING is already allocated on the objfile obstack, point
23426 result
= (const gdb_byte
*) DW_STRING (attr
);
23427 *len
= strlen (DW_STRING (attr
));
23429 case DW_FORM_block1
:
23430 case DW_FORM_block2
:
23431 case DW_FORM_block4
:
23432 case DW_FORM_block
:
23433 case DW_FORM_exprloc
:
23434 case DW_FORM_data16
:
23435 result
= DW_BLOCK (attr
)->data
;
23436 *len
= DW_BLOCK (attr
)->size
;
23439 /* The DW_AT_const_value attributes are supposed to carry the
23440 symbol's value "represented as it would be on the target
23441 architecture." By the time we get here, it's already been
23442 converted to host endianness, so we just need to sign- or
23443 zero-extend it as appropriate. */
23444 case DW_FORM_data1
:
23445 type
= die_type (die
, cu
);
23446 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 8);
23447 if (result
== NULL
)
23448 result
= write_constant_as_bytes (obstack
, byte_order
,
23451 case DW_FORM_data2
:
23452 type
= die_type (die
, cu
);
23453 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 16);
23454 if (result
== NULL
)
23455 result
= write_constant_as_bytes (obstack
, byte_order
,
23458 case DW_FORM_data4
:
23459 type
= die_type (die
, cu
);
23460 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 32);
23461 if (result
== NULL
)
23462 result
= write_constant_as_bytes (obstack
, byte_order
,
23465 case DW_FORM_data8
:
23466 type
= die_type (die
, cu
);
23467 result
= dwarf2_const_value_data (attr
, obstack
, cu
, &value
, 64);
23468 if (result
== NULL
)
23469 result
= write_constant_as_bytes (obstack
, byte_order
,
23473 case DW_FORM_sdata
:
23474 case DW_FORM_implicit_const
:
23475 type
= die_type (die
, cu
);
23476 result
= write_constant_as_bytes (obstack
, byte_order
,
23477 type
, DW_SND (attr
), len
);
23480 case DW_FORM_udata
:
23481 type
= die_type (die
, cu
);
23482 result
= write_constant_as_bytes (obstack
, byte_order
,
23483 type
, DW_UNSND (attr
), len
);
23487 complaint (_("unsupported const value attribute form: '%s'"),
23488 dwarf_form_name (attr
->form
));
23495 /* Return the type of the die at OFFSET in PER_CU. Return NULL if no
23496 valid type for this die is found. */
23499 dwarf2_fetch_die_type_sect_off (sect_offset sect_off
,
23500 struct dwarf2_per_cu_data
*per_cu
)
23502 struct dwarf2_cu
*cu
;
23503 struct die_info
*die
;
23505 if (per_cu
->cu
== NULL
)
23506 load_cu (per_cu
, false);
23511 die
= follow_die_offset (sect_off
, per_cu
->is_dwz
, &cu
);
23515 return die_type (die
, cu
);
23518 /* Return the type of the DIE at DIE_OFFSET in the CU named by
23522 dwarf2_get_die_type (cu_offset die_offset
,
23523 struct dwarf2_per_cu_data
*per_cu
)
23525 sect_offset die_offset_sect
= per_cu
->sect_off
+ to_underlying (die_offset
);
23526 return get_die_type_at_offset (die_offset_sect
, per_cu
);
23529 /* Follow type unit SIG_TYPE referenced by SRC_DIE.
23530 On entry *REF_CU is the CU of SRC_DIE.
23531 On exit *REF_CU is the CU of the result.
23532 Returns NULL if the referenced DIE isn't found. */
23534 static struct die_info
*
23535 follow_die_sig_1 (struct die_info
*src_die
, struct signatured_type
*sig_type
,
23536 struct dwarf2_cu
**ref_cu
)
23538 struct die_info temp_die
;
23539 struct dwarf2_cu
*sig_cu
, *cu
= *ref_cu
;
23540 struct die_info
*die
;
23542 /* While it might be nice to assert sig_type->type == NULL here,
23543 we can get here for DW_AT_imported_declaration where we need
23544 the DIE not the type. */
23546 /* If necessary, add it to the queue and load its DIEs. */
23548 if (maybe_queue_comp_unit (*ref_cu
, &sig_type
->per_cu
, language_minimal
))
23549 read_signatured_type (sig_type
);
23551 sig_cu
= sig_type
->per_cu
.cu
;
23552 gdb_assert (sig_cu
!= NULL
);
23553 gdb_assert (to_underlying (sig_type
->type_offset_in_section
) != 0);
23554 temp_die
.sect_off
= sig_type
->type_offset_in_section
;
23555 die
= (struct die_info
*) htab_find_with_hash (sig_cu
->die_hash
, &temp_die
,
23556 to_underlying (temp_die
.sect_off
));
23559 struct dwarf2_per_objfile
*dwarf2_per_objfile
23560 = (*ref_cu
)->per_cu
->dwarf2_per_objfile
;
23562 /* For .gdb_index version 7 keep track of included TUs.
23563 http://sourceware.org/bugzilla/show_bug.cgi?id=15021. */
23564 if (dwarf2_per_objfile
->index_table
!= NULL
23565 && dwarf2_per_objfile
->index_table
->version
<= 7)
23567 VEC_safe_push (dwarf2_per_cu_ptr
,
23568 (*ref_cu
)->per_cu
->imported_symtabs
,
23574 sig_cu
->ancestor
= cu
;
23582 /* Follow signatured type referenced by ATTR in SRC_DIE.
23583 On entry *REF_CU is the CU of SRC_DIE.
23584 On exit *REF_CU is the CU of the result.
23585 The result is the DIE of the type.
23586 If the referenced type cannot be found an error is thrown. */
23588 static struct die_info
*
23589 follow_die_sig (struct die_info
*src_die
, const struct attribute
*attr
,
23590 struct dwarf2_cu
**ref_cu
)
23592 ULONGEST signature
= DW_SIGNATURE (attr
);
23593 struct signatured_type
*sig_type
;
23594 struct die_info
*die
;
23596 gdb_assert (attr
->form
== DW_FORM_ref_sig8
);
23598 sig_type
= lookup_signatured_type (*ref_cu
, signature
);
23599 /* sig_type will be NULL if the signatured type is missing from
23601 if (sig_type
== NULL
)
23603 error (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23604 " from DIE at %s [in module %s]"),
23605 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23606 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23609 die
= follow_die_sig_1 (src_die
, sig_type
, ref_cu
);
23612 dump_die_for_error (src_die
);
23613 error (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23614 " from DIE at %s [in module %s]"),
23615 hex_string (signature
), sect_offset_str (src_die
->sect_off
),
23616 objfile_name ((*ref_cu
)->per_cu
->dwarf2_per_objfile
->objfile
));
23622 /* Get the type specified by SIGNATURE referenced in DIE/CU,
23623 reading in and processing the type unit if necessary. */
23625 static struct type
*
23626 get_signatured_type (struct die_info
*die
, ULONGEST signature
,
23627 struct dwarf2_cu
*cu
)
23629 struct dwarf2_per_objfile
*dwarf2_per_objfile
23630 = cu
->per_cu
->dwarf2_per_objfile
;
23631 struct signatured_type
*sig_type
;
23632 struct dwarf2_cu
*type_cu
;
23633 struct die_info
*type_die
;
23636 sig_type
= lookup_signatured_type (cu
, signature
);
23637 /* sig_type will be NULL if the signatured type is missing from
23639 if (sig_type
== NULL
)
23641 complaint (_("Dwarf Error: Cannot find signatured DIE %s referenced"
23642 " from DIE at %s [in module %s]"),
23643 hex_string (signature
), sect_offset_str (die
->sect_off
),
23644 objfile_name (dwarf2_per_objfile
->objfile
));
23645 return build_error_marker_type (cu
, die
);
23648 /* If we already know the type we're done. */
23649 if (sig_type
->type
!= NULL
)
23650 return sig_type
->type
;
23653 type_die
= follow_die_sig_1 (die
, sig_type
, &type_cu
);
23654 if (type_die
!= NULL
)
23656 /* N.B. We need to call get_die_type to ensure only one type for this DIE
23657 is created. This is important, for example, because for c++ classes
23658 we need TYPE_NAME set which is only done by new_symbol. Blech. */
23659 type
= read_type_die (type_die
, type_cu
);
23662 complaint (_("Dwarf Error: Cannot build signatured type %s"
23663 " referenced from DIE at %s [in module %s]"),
23664 hex_string (signature
), sect_offset_str (die
->sect_off
),
23665 objfile_name (dwarf2_per_objfile
->objfile
));
23666 type
= build_error_marker_type (cu
, die
);
23671 complaint (_("Dwarf Error: Problem reading signatured DIE %s referenced"
23672 " from DIE at %s [in module %s]"),
23673 hex_string (signature
), sect_offset_str (die
->sect_off
),
23674 objfile_name (dwarf2_per_objfile
->objfile
));
23675 type
= build_error_marker_type (cu
, die
);
23677 sig_type
->type
= type
;
23682 /* Get the type specified by the DW_AT_signature ATTR in DIE/CU,
23683 reading in and processing the type unit if necessary. */
23685 static struct type
*
23686 get_DW_AT_signature_type (struct die_info
*die
, const struct attribute
*attr
,
23687 struct dwarf2_cu
*cu
) /* ARI: editCase function */
23689 /* Yes, DW_AT_signature can use a non-ref_sig8 reference. */
23690 if (attr_form_is_ref (attr
))
23692 struct dwarf2_cu
*type_cu
= cu
;
23693 struct die_info
*type_die
= follow_die_ref (die
, attr
, &type_cu
);
23695 return read_type_die (type_die
, type_cu
);
23697 else if (attr
->form
== DW_FORM_ref_sig8
)
23699 return get_signatured_type (die
, DW_SIGNATURE (attr
), cu
);
23703 struct dwarf2_per_objfile
*dwarf2_per_objfile
23704 = cu
->per_cu
->dwarf2_per_objfile
;
23706 complaint (_("Dwarf Error: DW_AT_signature has bad form %s in DIE"
23707 " at %s [in module %s]"),
23708 dwarf_form_name (attr
->form
), sect_offset_str (die
->sect_off
),
23709 objfile_name (dwarf2_per_objfile
->objfile
));
23710 return build_error_marker_type (cu
, die
);
23714 /* Load the DIEs associated with type unit PER_CU into memory. */
23717 load_full_type_unit (struct dwarf2_per_cu_data
*per_cu
)
23719 struct signatured_type
*sig_type
;
23721 /* Caller is responsible for ensuring type_unit_groups don't get here. */
23722 gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu
));
23724 /* We have the per_cu, but we need the signatured_type.
23725 Fortunately this is an easy translation. */
23726 gdb_assert (per_cu
->is_debug_types
);
23727 sig_type
= (struct signatured_type
*) per_cu
;
23729 gdb_assert (per_cu
->cu
== NULL
);
23731 read_signatured_type (sig_type
);
23733 gdb_assert (per_cu
->cu
!= NULL
);
23736 /* die_reader_func for read_signatured_type.
23737 This is identical to load_full_comp_unit_reader,
23738 but is kept separate for now. */
23741 read_signatured_type_reader (const struct die_reader_specs
*reader
,
23742 const gdb_byte
*info_ptr
,
23743 struct die_info
*comp_unit_die
,
23747 struct dwarf2_cu
*cu
= reader
->cu
;
23749 gdb_assert (cu
->die_hash
== NULL
);
23751 htab_create_alloc_ex (cu
->header
.length
/ 12,
23755 &cu
->comp_unit_obstack
,
23756 hashtab_obstack_allocate
,
23757 dummy_obstack_deallocate
);
23760 comp_unit_die
->child
= read_die_and_siblings (reader
, info_ptr
,
23761 &info_ptr
, comp_unit_die
);
23762 cu
->dies
= comp_unit_die
;
23763 /* comp_unit_die is not stored in die_hash, no need. */
23765 /* We try not to read any attributes in this function, because not
23766 all CUs needed for references have been loaded yet, and symbol
23767 table processing isn't initialized. But we have to set the CU language,
23768 or we won't be able to build types correctly.
23769 Similarly, if we do not read the producer, we can not apply
23770 producer-specific interpretation. */
23771 prepare_one_comp_unit (cu
, cu
->dies
, language_minimal
);
23774 /* Read in a signatured type and build its CU and DIEs.
23775 If the type is a stub for the real type in a DWO file,
23776 read in the real type from the DWO file as well. */
23779 read_signatured_type (struct signatured_type
*sig_type
)
23781 struct dwarf2_per_cu_data
*per_cu
= &sig_type
->per_cu
;
23783 gdb_assert (per_cu
->is_debug_types
);
23784 gdb_assert (per_cu
->cu
== NULL
);
23786 init_cutu_and_read_dies (per_cu
, NULL
, 0, 1, false,
23787 read_signatured_type_reader
, NULL
);
23788 sig_type
->per_cu
.tu_read
= 1;
23791 /* Decode simple location descriptions.
23792 Given a pointer to a dwarf block that defines a location, compute
23793 the location and return the value.
23795 NOTE drow/2003-11-18: This function is called in two situations
23796 now: for the address of static or global variables (partial symbols
23797 only) and for offsets into structures which are expected to be
23798 (more or less) constant. The partial symbol case should go away,
23799 and only the constant case should remain. That will let this
23800 function complain more accurately. A few special modes are allowed
23801 without complaint for global variables (for instance, global
23802 register values and thread-local values).
23804 A location description containing no operations indicates that the
23805 object is optimized out. The return value is 0 for that case.
23806 FIXME drow/2003-11-16: No callers check for this case any more; soon all
23807 callers will only want a very basic result and this can become a
23810 Note that stack[0] is unused except as a default error return. */
23813 decode_locdesc (struct dwarf_block
*blk
, struct dwarf2_cu
*cu
)
23815 struct objfile
*objfile
= cu
->per_cu
->dwarf2_per_objfile
->objfile
;
23817 size_t size
= blk
->size
;
23818 const gdb_byte
*data
= blk
->data
;
23819 CORE_ADDR stack
[64];
23821 unsigned int bytes_read
, unsnd
;
23827 stack
[++stacki
] = 0;
23866 stack
[++stacki
] = op
- DW_OP_lit0
;
23901 stack
[++stacki
] = op
- DW_OP_reg0
;
23903 dwarf2_complex_location_expr_complaint ();
23907 unsnd
= read_unsigned_leb128 (NULL
, (data
+ i
), &bytes_read
);
23909 stack
[++stacki
] = unsnd
;
23911 dwarf2_complex_location_expr_complaint ();
23915 stack
[++stacki
] = read_address (objfile
->obfd
, &data
[i
],
23920 case DW_OP_const1u
:
23921 stack
[++stacki
] = read_1_byte (objfile
->obfd
, &data
[i
]);
23925 case DW_OP_const1s
:
23926 stack
[++stacki
] = read_1_signed_byte (objfile
->obfd
, &data
[i
]);
23930 case DW_OP_const2u
:
23931 stack
[++stacki
] = read_2_bytes (objfile
->obfd
, &data
[i
]);
23935 case DW_OP_const2s
:
23936 stack
[++stacki
] = read_2_signed_bytes (objfile
->obfd
, &data
[i
]);
23940 case DW_OP_const4u
:
23941 stack
[++stacki
] = read_4_bytes (objfile
->obfd
, &data
[i
]);
23945 case DW_OP_const4s
:
23946 stack
[++stacki
] = read_4_signed_bytes (objfile
->obfd
, &data
[i
]);
23950 case DW_OP_const8u
:
23951 stack
[++stacki
] = read_8_bytes (objfile
->obfd
, &data
[i
]);
23956 stack
[++stacki
] = read_unsigned_leb128 (NULL
, (data
+ i
),
23962 stack
[++stacki
] = read_signed_leb128 (NULL
, (data
+ i
), &bytes_read
);
23967 stack
[stacki
+ 1] = stack
[stacki
];
23972 stack
[stacki
- 1] += stack
[stacki
];
23976 case DW_OP_plus_uconst
:
23977 stack
[stacki
] += read_unsigned_leb128 (NULL
, (data
+ i
),
23983 stack
[stacki
- 1] -= stack
[stacki
];
23988 /* If we're not the last op, then we definitely can't encode
23989 this using GDB's address_class enum. This is valid for partial
23990 global symbols, although the variable's address will be bogus
23993 dwarf2_complex_location_expr_complaint ();
23996 case DW_OP_GNU_push_tls_address
:
23997 case DW_OP_form_tls_address
:
23998 /* The top of the stack has the offset from the beginning
23999 of the thread control block at which the variable is located. */
24000 /* Nothing should follow this operator, so the top of stack would
24002 /* This is valid for partial global symbols, but the variable's
24003 address will be bogus in the psymtab. Make it always at least
24004 non-zero to not look as a variable garbage collected by linker
24005 which have DW_OP_addr 0. */
24007 dwarf2_complex_location_expr_complaint ();
24011 case DW_OP_GNU_uninit
:
24015 case DW_OP_GNU_addr_index
:
24016 case DW_OP_GNU_const_index
:
24017 stack
[++stacki
] = read_addr_index_from_leb128 (cu
, &data
[i
],
24024 const char *name
= get_DW_OP_name (op
);
24027 complaint (_("unsupported stack op: '%s'"),
24030 complaint (_("unsupported stack op: '%02x'"),
24034 return (stack
[stacki
]);
24037 /* Enforce maximum stack depth of SIZE-1 to avoid writing
24038 outside of the allocated space. Also enforce minimum>0. */
24039 if (stacki
>= ARRAY_SIZE (stack
) - 1)
24041 complaint (_("location description stack overflow"));
24047 complaint (_("location description stack underflow"));
24051 return (stack
[stacki
]);
24054 /* memory allocation interface */
24056 static struct dwarf_block
*
24057 dwarf_alloc_block (struct dwarf2_cu
*cu
)
24059 return XOBNEW (&cu
->comp_unit_obstack
, struct dwarf_block
);
24062 static struct die_info
*
24063 dwarf_alloc_die (struct dwarf2_cu
*cu
, int num_attrs
)
24065 struct die_info
*die
;
24066 size_t size
= sizeof (struct die_info
);
24069 size
+= (num_attrs
- 1) * sizeof (struct attribute
);
24071 die
= (struct die_info
*) obstack_alloc (&cu
->comp_unit_obstack
, size
);
24072 memset (die
, 0, sizeof (struct die_info
));
24077 /* Macro support. */
24079 /* Return file name relative to the compilation directory of file number I in
24080 *LH's file name table. The result is allocated using xmalloc; the caller is
24081 responsible for freeing it. */
24084 file_file_name (int file
, struct line_header
*lh
)
24086 /* Is the file number a valid index into the line header's file name
24087 table? Remember that file numbers start with one, not zero. */
24088 if (1 <= file
&& file
<= lh
->file_names
.size ())
24090 const file_entry
&fe
= lh
->file_names
[file
- 1];
24092 if (!IS_ABSOLUTE_PATH (fe
.name
))
24094 const char *dir
= fe
.include_dir (lh
);
24096 return concat (dir
, SLASH_STRING
, fe
.name
, (char *) NULL
);
24098 return xstrdup (fe
.name
);
24102 /* The compiler produced a bogus file number. We can at least
24103 record the macro definitions made in the file, even if we
24104 won't be able to find the file by name. */
24105 char fake_name
[80];
24107 xsnprintf (fake_name
, sizeof (fake_name
),
24108 "<bad macro file number %d>", file
);
24110 complaint (_("bad file number in macro information (%d)"),
24113 return xstrdup (fake_name
);
24117 /* Return the full name of file number I in *LH's file name table.
24118 Use COMP_DIR as the name of the current directory of the
24119 compilation. The result is allocated using xmalloc; the caller is
24120 responsible for freeing it. */
24122 file_full_name (int file
, struct line_header
*lh
, const char *comp_dir
)
24124 /* Is the file number a valid index into the line header's file name
24125 table? Remember that file numbers start with one, not zero. */
24126 if (1 <= file
&& file
<= lh
->file_names
.size ())
24128 char *relative
= file_file_name (file
, lh
);
24130 if (IS_ABSOLUTE_PATH (relative
) || comp_dir
== NULL
)
24132 return reconcat (relative
, comp_dir
, SLASH_STRING
,
24133 relative
, (char *) NULL
);
24136 return file_file_name (file
, lh
);
24140 static struct macro_source_file
*
24141 macro_start_file (struct dwarf2_cu
*cu
,
24142 int file
, int line
,
24143 struct macro_source_file
*current_file
,
24144 struct line_header
*lh
)
24146 /* File name relative to the compilation directory of this source file. */
24147 char *file_name
= file_file_name (file
, lh
);
24149 if (! current_file
)
24151 /* Note: We don't create a macro table for this compilation unit
24152 at all until we actually get a filename. */
24153 struct macro_table
*macro_table
= cu
->get_builder ()->get_macro_table ();
24155 /* If we have no current file, then this must be the start_file
24156 directive for the compilation unit's main source file. */
24157 current_file
= macro_set_main (macro_table
, file_name
);
24158 macro_define_special (macro_table
);
24161 current_file
= macro_include (current_file
, line
, file_name
);
24165 return current_file
;
24168 static const char *
24169 consume_improper_spaces (const char *p
, const char *body
)
24173 complaint (_("macro definition contains spaces "
24174 "in formal argument list:\n`%s'"),
24186 parse_macro_definition (struct macro_source_file
*file
, int line
,
24191 /* The body string takes one of two forms. For object-like macro
24192 definitions, it should be:
24194 <macro name> " " <definition>
24196 For function-like macro definitions, it should be:
24198 <macro name> "() " <definition>
24200 <macro name> "(" <arg name> ( "," <arg name> ) * ") " <definition>
24202 Spaces may appear only where explicitly indicated, and in the
24205 The Dwarf 2 spec says that an object-like macro's name is always
24206 followed by a space, but versions of GCC around March 2002 omit
24207 the space when the macro's definition is the empty string.
24209 The Dwarf 2 spec says that there should be no spaces between the
24210 formal arguments in a function-like macro's formal argument list,
24211 but versions of GCC around March 2002 include spaces after the
24215 /* Find the extent of the macro name. The macro name is terminated
24216 by either a space or null character (for an object-like macro) or
24217 an opening paren (for a function-like macro). */
24218 for (p
= body
; *p
; p
++)
24219 if (*p
== ' ' || *p
== '(')
24222 if (*p
== ' ' || *p
== '\0')
24224 /* It's an object-like macro. */
24225 int name_len
= p
- body
;
24226 char *name
= savestring (body
, name_len
);
24227 const char *replacement
;
24230 replacement
= body
+ name_len
+ 1;
24233 dwarf2_macro_malformed_definition_complaint (body
);
24234 replacement
= body
+ name_len
;
24237 macro_define_object (file
, line
, name
, replacement
);
24241 else if (*p
== '(')
24243 /* It's a function-like macro. */
24244 char *name
= savestring (body
, p
- body
);
24247 char **argv
= XNEWVEC (char *, argv_size
);
24251 p
= consume_improper_spaces (p
, body
);
24253 /* Parse the formal argument list. */
24254 while (*p
&& *p
!= ')')
24256 /* Find the extent of the current argument name. */
24257 const char *arg_start
= p
;
24259 while (*p
&& *p
!= ',' && *p
!= ')' && *p
!= ' ')
24262 if (! *p
|| p
== arg_start
)
24263 dwarf2_macro_malformed_definition_complaint (body
);
24266 /* Make sure argv has room for the new argument. */
24267 if (argc
>= argv_size
)
24270 argv
= XRESIZEVEC (char *, argv
, argv_size
);
24273 argv
[argc
++] = savestring (arg_start
, p
- arg_start
);
24276 p
= consume_improper_spaces (p
, body
);
24278 /* Consume the comma, if present. */
24283 p
= consume_improper_spaces (p
, body
);
24292 /* Perfectly formed definition, no complaints. */
24293 macro_define_function (file
, line
, name
,
24294 argc
, (const char **) argv
,
24296 else if (*p
== '\0')
24298 /* Complain, but do define it. */
24299 dwarf2_macro_malformed_definition_complaint (body
);
24300 macro_define_function (file
, line
, name
,
24301 argc
, (const char **) argv
,
24305 /* Just complain. */
24306 dwarf2_macro_malformed_definition_complaint (body
);
24309 /* Just complain. */
24310 dwarf2_macro_malformed_definition_complaint (body
);
24316 for (i
= 0; i
< argc
; i
++)
24322 dwarf2_macro_malformed_definition_complaint (body
);
24325 /* Skip some bytes from BYTES according to the form given in FORM.
24326 Returns the new pointer. */
24328 static const gdb_byte
*
24329 skip_form_bytes (bfd
*abfd
, const gdb_byte
*bytes
, const gdb_byte
*buffer_end
,
24330 enum dwarf_form form
,
24331 unsigned int offset_size
,
24332 struct dwarf2_section_info
*section
)
24334 unsigned int bytes_read
;
24338 case DW_FORM_data1
:
24343 case DW_FORM_data2
:
24347 case DW_FORM_data4
:
24351 case DW_FORM_data8
:
24355 case DW_FORM_data16
:
24359 case DW_FORM_string
:
24360 read_direct_string (abfd
, bytes
, &bytes_read
);
24361 bytes
+= bytes_read
;
24364 case DW_FORM_sec_offset
:
24366 case DW_FORM_GNU_strp_alt
:
24367 bytes
+= offset_size
;
24370 case DW_FORM_block
:
24371 bytes
+= read_unsigned_leb128 (abfd
, bytes
, &bytes_read
);
24372 bytes
+= bytes_read
;
24375 case DW_FORM_block1
:
24376 bytes
+= 1 + read_1_byte (abfd
, bytes
);
24378 case DW_FORM_block2
:
24379 bytes
+= 2 + read_2_bytes (abfd
, bytes
);
24381 case DW_FORM_block4
:
24382 bytes
+= 4 + read_4_bytes (abfd
, bytes
);
24385 case DW_FORM_addrx
:
24386 case DW_FORM_sdata
:
24388 case DW_FORM_udata
:
24389 case DW_FORM_GNU_addr_index
:
24390 case DW_FORM_GNU_str_index
:
24391 bytes
= gdb_skip_leb128 (bytes
, buffer_end
);
24394 dwarf2_section_buffer_overflow_complaint (section
);
24399 case DW_FORM_implicit_const
:
24404 complaint (_("invalid form 0x%x in `%s'"),
24405 form
, get_section_name (section
));
24413 /* A helper for dwarf_decode_macros that handles skipping an unknown
24414 opcode. Returns an updated pointer to the macro data buffer; or,
24415 on error, issues a complaint and returns NULL. */
24417 static const gdb_byte
*
24418 skip_unknown_opcode (unsigned int opcode
,
24419 const gdb_byte
**opcode_definitions
,
24420 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24422 unsigned int offset_size
,
24423 struct dwarf2_section_info
*section
)
24425 unsigned int bytes_read
, i
;
24427 const gdb_byte
*defn
;
24429 if (opcode_definitions
[opcode
] == NULL
)
24431 complaint (_("unrecognized DW_MACFINO opcode 0x%x"),
24436 defn
= opcode_definitions
[opcode
];
24437 arg
= read_unsigned_leb128 (abfd
, defn
, &bytes_read
);
24438 defn
+= bytes_read
;
24440 for (i
= 0; i
< arg
; ++i
)
24442 mac_ptr
= skip_form_bytes (abfd
, mac_ptr
, mac_end
,
24443 (enum dwarf_form
) defn
[i
], offset_size
,
24445 if (mac_ptr
== NULL
)
24447 /* skip_form_bytes already issued the complaint. */
24455 /* A helper function which parses the header of a macro section.
24456 If the macro section is the extended (for now called "GNU") type,
24457 then this updates *OFFSET_SIZE. Returns a pointer to just after
24458 the header, or issues a complaint and returns NULL on error. */
24460 static const gdb_byte
*
24461 dwarf_parse_macro_header (const gdb_byte
**opcode_definitions
,
24463 const gdb_byte
*mac_ptr
,
24464 unsigned int *offset_size
,
24465 int section_is_gnu
)
24467 memset (opcode_definitions
, 0, 256 * sizeof (gdb_byte
*));
24469 if (section_is_gnu
)
24471 unsigned int version
, flags
;
24473 version
= read_2_bytes (abfd
, mac_ptr
);
24474 if (version
!= 4 && version
!= 5)
24476 complaint (_("unrecognized version `%d' in .debug_macro section"),
24482 flags
= read_1_byte (abfd
, mac_ptr
);
24484 *offset_size
= (flags
& 1) ? 8 : 4;
24486 if ((flags
& 2) != 0)
24487 /* We don't need the line table offset. */
24488 mac_ptr
+= *offset_size
;
24490 /* Vendor opcode descriptions. */
24491 if ((flags
& 4) != 0)
24493 unsigned int i
, count
;
24495 count
= read_1_byte (abfd
, mac_ptr
);
24497 for (i
= 0; i
< count
; ++i
)
24499 unsigned int opcode
, bytes_read
;
24502 opcode
= read_1_byte (abfd
, mac_ptr
);
24504 opcode_definitions
[opcode
] = mac_ptr
;
24505 arg
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24506 mac_ptr
+= bytes_read
;
24515 /* A helper for dwarf_decode_macros that handles the GNU extensions,
24516 including DW_MACRO_import. */
24519 dwarf_decode_macro_bytes (struct dwarf2_cu
*cu
,
24521 const gdb_byte
*mac_ptr
, const gdb_byte
*mac_end
,
24522 struct macro_source_file
*current_file
,
24523 struct line_header
*lh
,
24524 struct dwarf2_section_info
*section
,
24525 int section_is_gnu
, int section_is_dwz
,
24526 unsigned int offset_size
,
24527 htab_t include_hash
)
24529 struct dwarf2_per_objfile
*dwarf2_per_objfile
24530 = cu
->per_cu
->dwarf2_per_objfile
;
24531 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24532 enum dwarf_macro_record_type macinfo_type
;
24533 int at_commandline
;
24534 const gdb_byte
*opcode_definitions
[256];
24536 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24537 &offset_size
, section_is_gnu
);
24538 if (mac_ptr
== NULL
)
24540 /* We already issued a complaint. */
24544 /* Determines if GDB is still before first DW_MACINFO_start_file. If true
24545 GDB is still reading the definitions from command line. First
24546 DW_MACINFO_start_file will need to be ignored as it was already executed
24547 to create CURRENT_FILE for the main source holding also the command line
24548 definitions. On first met DW_MACINFO_start_file this flag is reset to
24549 normally execute all the remaining DW_MACINFO_start_file macinfos. */
24551 at_commandline
= 1;
24555 /* Do we at least have room for a macinfo type byte? */
24556 if (mac_ptr
>= mac_end
)
24558 dwarf2_section_buffer_overflow_complaint (section
);
24562 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24565 /* Note that we rely on the fact that the corresponding GNU and
24566 DWARF constants are the same. */
24568 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24569 switch (macinfo_type
)
24571 /* A zero macinfo type indicates the end of the macro
24576 case DW_MACRO_define
:
24577 case DW_MACRO_undef
:
24578 case DW_MACRO_define_strp
:
24579 case DW_MACRO_undef_strp
:
24580 case DW_MACRO_define_sup
:
24581 case DW_MACRO_undef_sup
:
24583 unsigned int bytes_read
;
24588 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24589 mac_ptr
+= bytes_read
;
24591 if (macinfo_type
== DW_MACRO_define
24592 || macinfo_type
== DW_MACRO_undef
)
24594 body
= read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24595 mac_ptr
+= bytes_read
;
24599 LONGEST str_offset
;
24601 str_offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24602 mac_ptr
+= offset_size
;
24604 if (macinfo_type
== DW_MACRO_define_sup
24605 || macinfo_type
== DW_MACRO_undef_sup
24608 struct dwz_file
*dwz
24609 = dwarf2_get_dwz_file (dwarf2_per_objfile
);
24611 body
= read_indirect_string_from_dwz (objfile
,
24615 body
= read_indirect_string_at_offset (dwarf2_per_objfile
,
24619 is_define
= (macinfo_type
== DW_MACRO_define
24620 || macinfo_type
== DW_MACRO_define_strp
24621 || macinfo_type
== DW_MACRO_define_sup
);
24622 if (! current_file
)
24624 /* DWARF violation as no main source is present. */
24625 complaint (_("debug info with no main source gives macro %s "
24627 is_define
? _("definition") : _("undefinition"),
24631 if ((line
== 0 && !at_commandline
)
24632 || (line
!= 0 && at_commandline
))
24633 complaint (_("debug info gives %s macro %s with %s line %d: %s"),
24634 at_commandline
? _("command-line") : _("in-file"),
24635 is_define
? _("definition") : _("undefinition"),
24636 line
== 0 ? _("zero") : _("non-zero"), line
, body
);
24641 parse_macro_definition (current_file
, line
, body
);
24644 /* Fedora's rpm-build's "debugedit" binary
24645 corrupted .debug_macro sections.
24648 https://bugzilla.redhat.com/show_bug.cgi?id=1708786 */
24649 complaint (_("debug info gives %s invalid macro definition "
24650 "without body (corrupted?) at line %d"
24652 at_commandline
? _("command-line")
24654 line
, current_file
->filename
);
24659 gdb_assert (macinfo_type
== DW_MACRO_undef
24660 || macinfo_type
== DW_MACRO_undef_strp
24661 || macinfo_type
== DW_MACRO_undef_sup
);
24662 macro_undef (current_file
, line
, body
);
24667 case DW_MACRO_start_file
:
24669 unsigned int bytes_read
;
24672 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24673 mac_ptr
+= bytes_read
;
24674 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24675 mac_ptr
+= bytes_read
;
24677 if ((line
== 0 && !at_commandline
)
24678 || (line
!= 0 && at_commandline
))
24679 complaint (_("debug info gives source %d included "
24680 "from %s at %s line %d"),
24681 file
, at_commandline
? _("command-line") : _("file"),
24682 line
== 0 ? _("zero") : _("non-zero"), line
);
24684 if (at_commandline
)
24686 /* This DW_MACRO_start_file was executed in the
24688 at_commandline
= 0;
24691 current_file
= macro_start_file (cu
, file
, line
, current_file
,
24696 case DW_MACRO_end_file
:
24697 if (! current_file
)
24698 complaint (_("macro debug info has an unmatched "
24699 "`close_file' directive"));
24702 current_file
= current_file
->included_by
;
24703 if (! current_file
)
24705 enum dwarf_macro_record_type next_type
;
24707 /* GCC circa March 2002 doesn't produce the zero
24708 type byte marking the end of the compilation
24709 unit. Complain if it's not there, but exit no
24712 /* Do we at least have room for a macinfo type byte? */
24713 if (mac_ptr
>= mac_end
)
24715 dwarf2_section_buffer_overflow_complaint (section
);
24719 /* We don't increment mac_ptr here, so this is just
24722 = (enum dwarf_macro_record_type
) read_1_byte (abfd
,
24724 if (next_type
!= 0)
24725 complaint (_("no terminating 0-type entry for "
24726 "macros in `.debug_macinfo' section"));
24733 case DW_MACRO_import
:
24734 case DW_MACRO_import_sup
:
24738 bfd
*include_bfd
= abfd
;
24739 struct dwarf2_section_info
*include_section
= section
;
24740 const gdb_byte
*include_mac_end
= mac_end
;
24741 int is_dwz
= section_is_dwz
;
24742 const gdb_byte
*new_mac_ptr
;
24744 offset
= read_offset_1 (abfd
, mac_ptr
, offset_size
);
24745 mac_ptr
+= offset_size
;
24747 if (macinfo_type
== DW_MACRO_import_sup
)
24749 struct dwz_file
*dwz
= dwarf2_get_dwz_file (dwarf2_per_objfile
);
24751 dwarf2_read_section (objfile
, &dwz
->macro
);
24753 include_section
= &dwz
->macro
;
24754 include_bfd
= get_section_bfd_owner (include_section
);
24755 include_mac_end
= dwz
->macro
.buffer
+ dwz
->macro
.size
;
24759 new_mac_ptr
= include_section
->buffer
+ offset
;
24760 slot
= htab_find_slot (include_hash
, new_mac_ptr
, INSERT
);
24764 /* This has actually happened; see
24765 http://sourceware.org/bugzilla/show_bug.cgi?id=13568. */
24766 complaint (_("recursive DW_MACRO_import in "
24767 ".debug_macro section"));
24771 *slot
= (void *) new_mac_ptr
;
24773 dwarf_decode_macro_bytes (cu
, include_bfd
, new_mac_ptr
,
24774 include_mac_end
, current_file
, lh
,
24775 section
, section_is_gnu
, is_dwz
,
24776 offset_size
, include_hash
);
24778 htab_remove_elt (include_hash
, (void *) new_mac_ptr
);
24783 case DW_MACINFO_vendor_ext
:
24784 if (!section_is_gnu
)
24786 unsigned int bytes_read
;
24788 /* This reads the constant, but since we don't recognize
24789 any vendor extensions, we ignore it. */
24790 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24791 mac_ptr
+= bytes_read
;
24792 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24793 mac_ptr
+= bytes_read
;
24795 /* We don't recognize any vendor extensions. */
24801 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24802 mac_ptr
, mac_end
, abfd
, offset_size
,
24804 if (mac_ptr
== NULL
)
24809 } while (macinfo_type
!= 0);
24813 dwarf_decode_macros (struct dwarf2_cu
*cu
, unsigned int offset
,
24814 int section_is_gnu
)
24816 struct dwarf2_per_objfile
*dwarf2_per_objfile
24817 = cu
->per_cu
->dwarf2_per_objfile
;
24818 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
24819 struct line_header
*lh
= cu
->line_header
;
24821 const gdb_byte
*mac_ptr
, *mac_end
;
24822 struct macro_source_file
*current_file
= 0;
24823 enum dwarf_macro_record_type macinfo_type
;
24824 unsigned int offset_size
= cu
->header
.offset_size
;
24825 const gdb_byte
*opcode_definitions
[256];
24827 struct dwarf2_section_info
*section
;
24828 const char *section_name
;
24830 if (cu
->dwo_unit
!= NULL
)
24832 if (section_is_gnu
)
24834 section
= &cu
->dwo_unit
->dwo_file
->sections
.macro
;
24835 section_name
= ".debug_macro.dwo";
24839 section
= &cu
->dwo_unit
->dwo_file
->sections
.macinfo
;
24840 section_name
= ".debug_macinfo.dwo";
24845 if (section_is_gnu
)
24847 section
= &dwarf2_per_objfile
->macro
;
24848 section_name
= ".debug_macro";
24852 section
= &dwarf2_per_objfile
->macinfo
;
24853 section_name
= ".debug_macinfo";
24857 dwarf2_read_section (objfile
, section
);
24858 if (section
->buffer
== NULL
)
24860 complaint (_("missing %s section"), section_name
);
24863 abfd
= get_section_bfd_owner (section
);
24865 /* First pass: Find the name of the base filename.
24866 This filename is needed in order to process all macros whose definition
24867 (or undefinition) comes from the command line. These macros are defined
24868 before the first DW_MACINFO_start_file entry, and yet still need to be
24869 associated to the base file.
24871 To determine the base file name, we scan the macro definitions until we
24872 reach the first DW_MACINFO_start_file entry. We then initialize
24873 CURRENT_FILE accordingly so that any macro definition found before the
24874 first DW_MACINFO_start_file can still be associated to the base file. */
24876 mac_ptr
= section
->buffer
+ offset
;
24877 mac_end
= section
->buffer
+ section
->size
;
24879 mac_ptr
= dwarf_parse_macro_header (opcode_definitions
, abfd
, mac_ptr
,
24880 &offset_size
, section_is_gnu
);
24881 if (mac_ptr
== NULL
)
24883 /* We already issued a complaint. */
24889 /* Do we at least have room for a macinfo type byte? */
24890 if (mac_ptr
>= mac_end
)
24892 /* Complaint is printed during the second pass as GDB will probably
24893 stop the first pass earlier upon finding
24894 DW_MACINFO_start_file. */
24898 macinfo_type
= (enum dwarf_macro_record_type
) read_1_byte (abfd
, mac_ptr
);
24901 /* Note that we rely on the fact that the corresponding GNU and
24902 DWARF constants are the same. */
24904 DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
24905 switch (macinfo_type
)
24907 /* A zero macinfo type indicates the end of the macro
24912 case DW_MACRO_define
:
24913 case DW_MACRO_undef
:
24914 /* Only skip the data by MAC_PTR. */
24916 unsigned int bytes_read
;
24918 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24919 mac_ptr
+= bytes_read
;
24920 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24921 mac_ptr
+= bytes_read
;
24925 case DW_MACRO_start_file
:
24927 unsigned int bytes_read
;
24930 line
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24931 mac_ptr
+= bytes_read
;
24932 file
= read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24933 mac_ptr
+= bytes_read
;
24935 current_file
= macro_start_file (cu
, file
, line
, current_file
, lh
);
24939 case DW_MACRO_end_file
:
24940 /* No data to skip by MAC_PTR. */
24943 case DW_MACRO_define_strp
:
24944 case DW_MACRO_undef_strp
:
24945 case DW_MACRO_define_sup
:
24946 case DW_MACRO_undef_sup
:
24948 unsigned int bytes_read
;
24950 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24951 mac_ptr
+= bytes_read
;
24952 mac_ptr
+= offset_size
;
24956 case DW_MACRO_import
:
24957 case DW_MACRO_import_sup
:
24958 /* Note that, according to the spec, a transparent include
24959 chain cannot call DW_MACRO_start_file. So, we can just
24960 skip this opcode. */
24961 mac_ptr
+= offset_size
;
24964 case DW_MACINFO_vendor_ext
:
24965 /* Only skip the data by MAC_PTR. */
24966 if (!section_is_gnu
)
24968 unsigned int bytes_read
;
24970 read_unsigned_leb128 (abfd
, mac_ptr
, &bytes_read
);
24971 mac_ptr
+= bytes_read
;
24972 read_direct_string (abfd
, mac_ptr
, &bytes_read
);
24973 mac_ptr
+= bytes_read
;
24978 mac_ptr
= skip_unknown_opcode (macinfo_type
, opcode_definitions
,
24979 mac_ptr
, mac_end
, abfd
, offset_size
,
24981 if (mac_ptr
== NULL
)
24986 } while (macinfo_type
!= 0 && current_file
== NULL
);
24988 /* Second pass: Process all entries.
24990 Use the AT_COMMAND_LINE flag to determine whether we are still processing
24991 command-line macro definitions/undefinitions. This flag is unset when we
24992 reach the first DW_MACINFO_start_file entry. */
24994 htab_up
include_hash (htab_create_alloc (1, htab_hash_pointer
,
24996 NULL
, xcalloc
, xfree
));
24997 mac_ptr
= section
->buffer
+ offset
;
24998 slot
= htab_find_slot (include_hash
.get (), mac_ptr
, INSERT
);
24999 *slot
= (void *) mac_ptr
;
25000 dwarf_decode_macro_bytes (cu
, abfd
, mac_ptr
, mac_end
,
25001 current_file
, lh
, section
,
25002 section_is_gnu
, 0, offset_size
,
25003 include_hash
.get ());
25006 /* Check if the attribute's form is a DW_FORM_block*
25007 if so return true else false. */
25010 attr_form_is_block (const struct attribute
*attr
)
25012 return (attr
== NULL
? 0 :
25013 attr
->form
== DW_FORM_block1
25014 || attr
->form
== DW_FORM_block2
25015 || attr
->form
== DW_FORM_block4
25016 || attr
->form
== DW_FORM_block
25017 || attr
->form
== DW_FORM_exprloc
);
25020 /* Return non-zero if ATTR's value is a section offset --- classes
25021 lineptr, loclistptr, macptr or rangelistptr --- or zero, otherwise.
25022 You may use DW_UNSND (attr) to retrieve such offsets.
25024 Section 7.5.4, "Attribute Encodings", explains that no attribute
25025 may have a value that belongs to more than one of these classes; it
25026 would be ambiguous if we did, because we use the same forms for all
25030 attr_form_is_section_offset (const struct attribute
*attr
)
25032 return (attr
->form
== DW_FORM_data4
25033 || attr
->form
== DW_FORM_data8
25034 || attr
->form
== DW_FORM_sec_offset
);
25037 /* Return non-zero if ATTR's value falls in the 'constant' class, or
25038 zero otherwise. When this function returns true, you can apply
25039 dwarf2_get_attr_constant_value to it.
25041 However, note that for some attributes you must check
25042 attr_form_is_section_offset before using this test. DW_FORM_data4
25043 and DW_FORM_data8 are members of both the constant class, and of
25044 the classes that contain offsets into other debug sections
25045 (lineptr, loclistptr, macptr or rangelistptr). The DWARF spec says
25046 that, if an attribute's can be either a constant or one of the
25047 section offset classes, DW_FORM_data4 and DW_FORM_data8 should be
25048 taken as section offsets, not constants.
25050 DW_FORM_data16 is not considered as dwarf2_get_attr_constant_value
25051 cannot handle that. */
25054 attr_form_is_constant (const struct attribute
*attr
)
25056 switch (attr
->form
)
25058 case DW_FORM_sdata
:
25059 case DW_FORM_udata
:
25060 case DW_FORM_data1
:
25061 case DW_FORM_data2
:
25062 case DW_FORM_data4
:
25063 case DW_FORM_data8
:
25064 case DW_FORM_implicit_const
:
25072 /* DW_ADDR is always stored already as sect_offset; despite for the forms
25073 besides DW_FORM_ref_addr it is stored as cu_offset in the DWARF file. */
25076 attr_form_is_ref (const struct attribute
*attr
)
25078 switch (attr
->form
)
25080 case DW_FORM_ref_addr
:
25085 case DW_FORM_ref_udata
:
25086 case DW_FORM_GNU_ref_alt
:
25093 /* Return the .debug_loc section to use for CU.
25094 For DWO files use .debug_loc.dwo. */
25096 static struct dwarf2_section_info
*
25097 cu_debug_loc_section (struct dwarf2_cu
*cu
)
25099 struct dwarf2_per_objfile
*dwarf2_per_objfile
25100 = cu
->per_cu
->dwarf2_per_objfile
;
25104 struct dwo_sections
*sections
= &cu
->dwo_unit
->dwo_file
->sections
;
25106 return cu
->header
.version
>= 5 ? §ions
->loclists
: §ions
->loc
;
25108 return (cu
->header
.version
>= 5 ? &dwarf2_per_objfile
->loclists
25109 : &dwarf2_per_objfile
->loc
);
25112 /* A helper function that fills in a dwarf2_loclist_baton. */
25115 fill_in_loclist_baton (struct dwarf2_cu
*cu
,
25116 struct dwarf2_loclist_baton
*baton
,
25117 const struct attribute
*attr
)
25119 struct dwarf2_per_objfile
*dwarf2_per_objfile
25120 = cu
->per_cu
->dwarf2_per_objfile
;
25121 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
25123 dwarf2_read_section (dwarf2_per_objfile
->objfile
, section
);
25125 baton
->per_cu
= cu
->per_cu
;
25126 gdb_assert (baton
->per_cu
);
25127 /* We don't know how long the location list is, but make sure we
25128 don't run off the edge of the section. */
25129 baton
->size
= section
->size
- DW_UNSND (attr
);
25130 baton
->data
= section
->buffer
+ DW_UNSND (attr
);
25131 baton
->base_address
= cu
->base_address
;
25132 baton
->from_dwo
= cu
->dwo_unit
!= NULL
;
25136 dwarf2_symbol_mark_computed (const struct attribute
*attr
, struct symbol
*sym
,
25137 struct dwarf2_cu
*cu
, int is_block
)
25139 struct dwarf2_per_objfile
*dwarf2_per_objfile
25140 = cu
->per_cu
->dwarf2_per_objfile
;
25141 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25142 struct dwarf2_section_info
*section
= cu_debug_loc_section (cu
);
25144 if (attr_form_is_section_offset (attr
)
25145 /* .debug_loc{,.dwo} may not exist at all, or the offset may be outside
25146 the section. If so, fall through to the complaint in the
25148 && DW_UNSND (attr
) < dwarf2_section_size (objfile
, section
))
25150 struct dwarf2_loclist_baton
*baton
;
25152 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_loclist_baton
);
25154 fill_in_loclist_baton (cu
, baton
, attr
);
25156 if (cu
->base_known
== 0)
25157 complaint (_("Location list used without "
25158 "specifying the CU base address."));
25160 SYMBOL_ACLASS_INDEX (sym
) = (is_block
25161 ? dwarf2_loclist_block_index
25162 : dwarf2_loclist_index
);
25163 SYMBOL_LOCATION_BATON (sym
) = baton
;
25167 struct dwarf2_locexpr_baton
*baton
;
25169 baton
= XOBNEW (&objfile
->objfile_obstack
, struct dwarf2_locexpr_baton
);
25170 baton
->per_cu
= cu
->per_cu
;
25171 gdb_assert (baton
->per_cu
);
25173 if (attr_form_is_block (attr
))
25175 /* Note that we're just copying the block's data pointer
25176 here, not the actual data. We're still pointing into the
25177 info_buffer for SYM's objfile; right now we never release
25178 that buffer, but when we do clean up properly this may
25180 baton
->size
= DW_BLOCK (attr
)->size
;
25181 baton
->data
= DW_BLOCK (attr
)->data
;
25185 dwarf2_invalid_attrib_class_complaint ("location description",
25186 SYMBOL_NATURAL_NAME (sym
));
25190 SYMBOL_ACLASS_INDEX (sym
) = (is_block
25191 ? dwarf2_locexpr_block_index
25192 : dwarf2_locexpr_index
);
25193 SYMBOL_LOCATION_BATON (sym
) = baton
;
25197 /* Return the OBJFILE associated with the compilation unit CU. If CU
25198 came from a separate debuginfo file, then the master objfile is
25202 dwarf2_per_cu_objfile (struct dwarf2_per_cu_data
*per_cu
)
25204 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
25206 /* Return the master objfile, so that we can report and look up the
25207 correct file containing this variable. */
25208 if (objfile
->separate_debug_objfile_backlink
)
25209 objfile
= objfile
->separate_debug_objfile_backlink
;
25214 /* Return comp_unit_head for PER_CU, either already available in PER_CU->CU
25215 (CU_HEADERP is unused in such case) or prepare a temporary copy at
25216 CU_HEADERP first. */
25218 static const struct comp_unit_head
*
25219 per_cu_header_read_in (struct comp_unit_head
*cu_headerp
,
25220 struct dwarf2_per_cu_data
*per_cu
)
25222 const gdb_byte
*info_ptr
;
25225 return &per_cu
->cu
->header
;
25227 info_ptr
= per_cu
->section
->buffer
+ to_underlying (per_cu
->sect_off
);
25229 memset (cu_headerp
, 0, sizeof (*cu_headerp
));
25230 read_comp_unit_head (cu_headerp
, info_ptr
, per_cu
->section
,
25231 rcuh_kind::COMPILE
);
25236 /* Return the address size given in the compilation unit header for CU. */
25239 dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data
*per_cu
)
25241 struct comp_unit_head cu_header_local
;
25242 const struct comp_unit_head
*cu_headerp
;
25244 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
25246 return cu_headerp
->addr_size
;
25249 /* Return the offset size given in the compilation unit header for CU. */
25252 dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data
*per_cu
)
25254 struct comp_unit_head cu_header_local
;
25255 const struct comp_unit_head
*cu_headerp
;
25257 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
25259 return cu_headerp
->offset_size
;
25262 /* See its dwarf2loc.h declaration. */
25265 dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data
*per_cu
)
25267 struct comp_unit_head cu_header_local
;
25268 const struct comp_unit_head
*cu_headerp
;
25270 cu_headerp
= per_cu_header_read_in (&cu_header_local
, per_cu
);
25272 if (cu_headerp
->version
== 2)
25273 return cu_headerp
->addr_size
;
25275 return cu_headerp
->offset_size
;
25278 /* Return the text offset of the CU. The returned offset comes from
25279 this CU's objfile. If this objfile came from a separate debuginfo
25280 file, then the offset may be different from the corresponding
25281 offset in the parent objfile. */
25284 dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data
*per_cu
)
25286 struct objfile
*objfile
= per_cu
->dwarf2_per_objfile
->objfile
;
25288 return ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
25291 /* Return DWARF version number of PER_CU. */
25294 dwarf2_version (struct dwarf2_per_cu_data
*per_cu
)
25296 return per_cu
->dwarf_version
;
25299 /* Locate the .debug_info compilation unit from CU's objfile which contains
25300 the DIE at OFFSET. Raises an error on failure. */
25302 static struct dwarf2_per_cu_data
*
25303 dwarf2_find_containing_comp_unit (sect_offset sect_off
,
25304 unsigned int offset_in_dwz
,
25305 struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25307 struct dwarf2_per_cu_data
*this_cu
;
25311 high
= dwarf2_per_objfile
->all_comp_units
.size () - 1;
25314 struct dwarf2_per_cu_data
*mid_cu
;
25315 int mid
= low
+ (high
- low
) / 2;
25317 mid_cu
= dwarf2_per_objfile
->all_comp_units
[mid
];
25318 if (mid_cu
->is_dwz
> offset_in_dwz
25319 || (mid_cu
->is_dwz
== offset_in_dwz
25320 && mid_cu
->sect_off
+ mid_cu
->length
>= sect_off
))
25325 gdb_assert (low
== high
);
25326 this_cu
= dwarf2_per_objfile
->all_comp_units
[low
];
25327 if (this_cu
->is_dwz
!= offset_in_dwz
|| this_cu
->sect_off
> sect_off
)
25329 if (low
== 0 || this_cu
->is_dwz
!= offset_in_dwz
)
25330 error (_("Dwarf Error: could not find partial DIE containing "
25331 "offset %s [in module %s]"),
25332 sect_offset_str (sect_off
),
25333 bfd_get_filename (dwarf2_per_objfile
->objfile
->obfd
));
25335 gdb_assert (dwarf2_per_objfile
->all_comp_units
[low
-1]->sect_off
25337 return dwarf2_per_objfile
->all_comp_units
[low
-1];
25341 if (low
== dwarf2_per_objfile
->all_comp_units
.size () - 1
25342 && sect_off
>= this_cu
->sect_off
+ this_cu
->length
)
25343 error (_("invalid dwarf2 offset %s"), sect_offset_str (sect_off
));
25344 gdb_assert (sect_off
< this_cu
->sect_off
+ this_cu
->length
);
25349 /* Initialize dwarf2_cu CU, owned by PER_CU. */
25351 dwarf2_cu::dwarf2_cu (struct dwarf2_per_cu_data
*per_cu_
)
25352 : per_cu (per_cu_
),
25354 has_loclist (false),
25355 checked_producer (false),
25356 producer_is_gxx_lt_4_6 (false),
25357 producer_is_gcc_lt_4_3 (false),
25358 producer_is_icc (false),
25359 producer_is_icc_lt_14 (false),
25360 producer_is_codewarrior (false),
25361 processing_has_namespace_info (false)
25366 /* Destroy a dwarf2_cu. */
25368 dwarf2_cu::~dwarf2_cu ()
25373 /* Initialize basic fields of dwarf_cu CU according to DIE COMP_UNIT_DIE. */
25376 prepare_one_comp_unit (struct dwarf2_cu
*cu
, struct die_info
*comp_unit_die
,
25377 enum language pretend_language
)
25379 struct attribute
*attr
;
25381 /* Set the language we're debugging. */
25382 attr
= dwarf2_attr (comp_unit_die
, DW_AT_language
, cu
);
25384 set_cu_language (DW_UNSND (attr
), cu
);
25387 cu
->language
= pretend_language
;
25388 cu
->language_defn
= language_def (cu
->language
);
25391 cu
->producer
= dwarf2_string_attr (comp_unit_die
, DW_AT_producer
, cu
);
25394 /* Increase the age counter on each cached compilation unit, and free
25395 any that are too old. */
25398 age_cached_comp_units (struct dwarf2_per_objfile
*dwarf2_per_objfile
)
25400 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25402 dwarf2_clear_marks (dwarf2_per_objfile
->read_in_chain
);
25403 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25404 while (per_cu
!= NULL
)
25406 per_cu
->cu
->last_used
++;
25407 if (per_cu
->cu
->last_used
<= dwarf_max_cache_age
)
25408 dwarf2_mark (per_cu
->cu
);
25409 per_cu
= per_cu
->cu
->read_in_chain
;
25412 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25413 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25414 while (per_cu
!= NULL
)
25416 struct dwarf2_per_cu_data
*next_cu
;
25418 next_cu
= per_cu
->cu
->read_in_chain
;
25420 if (!per_cu
->cu
->mark
)
25423 *last_chain
= next_cu
;
25426 last_chain
= &per_cu
->cu
->read_in_chain
;
25432 /* Remove a single compilation unit from the cache. */
25435 free_one_cached_comp_unit (struct dwarf2_per_cu_data
*target_per_cu
)
25437 struct dwarf2_per_cu_data
*per_cu
, **last_chain
;
25438 struct dwarf2_per_objfile
*dwarf2_per_objfile
25439 = target_per_cu
->dwarf2_per_objfile
;
25441 per_cu
= dwarf2_per_objfile
->read_in_chain
;
25442 last_chain
= &dwarf2_per_objfile
->read_in_chain
;
25443 while (per_cu
!= NULL
)
25445 struct dwarf2_per_cu_data
*next_cu
;
25447 next_cu
= per_cu
->cu
->read_in_chain
;
25449 if (per_cu
== target_per_cu
)
25453 *last_chain
= next_cu
;
25457 last_chain
= &per_cu
->cu
->read_in_chain
;
25463 /* A set of CU "per_cu" pointer, DIE offset, and GDB type pointer.
25464 We store these in a hash table separate from the DIEs, and preserve them
25465 when the DIEs are flushed out of cache.
25467 The CU "per_cu" pointer is needed because offset alone is not enough to
25468 uniquely identify the type. A file may have multiple .debug_types sections,
25469 or the type may come from a DWO file. Furthermore, while it's more logical
25470 to use per_cu->section+offset, with Fission the section with the data is in
25471 the DWO file but we don't know that section at the point we need it.
25472 We have to use something in dwarf2_per_cu_data (or the pointer to it)
25473 because we can enter the lookup routine, get_die_type_at_offset, from
25474 outside this file, and thus won't necessarily have PER_CU->cu.
25475 Fortunately, PER_CU is stable for the life of the objfile. */
25477 struct dwarf2_per_cu_offset_and_type
25479 const struct dwarf2_per_cu_data
*per_cu
;
25480 sect_offset sect_off
;
25484 /* Hash function for a dwarf2_per_cu_offset_and_type. */
25487 per_cu_offset_and_type_hash (const void *item
)
25489 const struct dwarf2_per_cu_offset_and_type
*ofs
25490 = (const struct dwarf2_per_cu_offset_and_type
*) item
;
25492 return (uintptr_t) ofs
->per_cu
+ to_underlying (ofs
->sect_off
);
25495 /* Equality function for a dwarf2_per_cu_offset_and_type. */
25498 per_cu_offset_and_type_eq (const void *item_lhs
, const void *item_rhs
)
25500 const struct dwarf2_per_cu_offset_and_type
*ofs_lhs
25501 = (const struct dwarf2_per_cu_offset_and_type
*) item_lhs
;
25502 const struct dwarf2_per_cu_offset_and_type
*ofs_rhs
25503 = (const struct dwarf2_per_cu_offset_and_type
*) item_rhs
;
25505 return (ofs_lhs
->per_cu
== ofs_rhs
->per_cu
25506 && ofs_lhs
->sect_off
== ofs_rhs
->sect_off
);
25509 /* Set the type associated with DIE to TYPE. Save it in CU's hash
25510 table if necessary. For convenience, return TYPE.
25512 The DIEs reading must have careful ordering to:
25513 * Not cause infite loops trying to read in DIEs as a prerequisite for
25514 reading current DIE.
25515 * Not trying to dereference contents of still incompletely read in types
25516 while reading in other DIEs.
25517 * Enable referencing still incompletely read in types just by a pointer to
25518 the type without accessing its fields.
25520 Therefore caller should follow these rules:
25521 * Try to fetch any prerequisite types we may need to build this DIE type
25522 before building the type and calling set_die_type.
25523 * After building type call set_die_type for current DIE as soon as
25524 possible before fetching more types to complete the current type.
25525 * Make the type as complete as possible before fetching more types. */
25527 static struct type
*
25528 set_die_type (struct die_info
*die
, struct type
*type
, struct dwarf2_cu
*cu
)
25530 struct dwarf2_per_objfile
*dwarf2_per_objfile
25531 = cu
->per_cu
->dwarf2_per_objfile
;
25532 struct dwarf2_per_cu_offset_and_type
**slot
, ofs
;
25533 struct objfile
*objfile
= dwarf2_per_objfile
->objfile
;
25534 struct attribute
*attr
;
25535 struct dynamic_prop prop
;
25537 /* For Ada types, make sure that the gnat-specific data is always
25538 initialized (if not already set). There are a few types where
25539 we should not be doing so, because the type-specific area is
25540 already used to hold some other piece of info (eg: TYPE_CODE_FLT
25541 where the type-specific area is used to store the floatformat).
25542 But this is not a problem, because the gnat-specific information
25543 is actually not needed for these types. */
25544 if (need_gnat_info (cu
)
25545 && TYPE_CODE (type
) != TYPE_CODE_FUNC
25546 && TYPE_CODE (type
) != TYPE_CODE_FLT
25547 && TYPE_CODE (type
) != TYPE_CODE_METHODPTR
25548 && TYPE_CODE (type
) != TYPE_CODE_MEMBERPTR
25549 && TYPE_CODE (type
) != TYPE_CODE_METHOD
25550 && !HAVE_GNAT_AUX_INFO (type
))
25551 INIT_GNAT_SPECIFIC (type
);
25553 /* Read DW_AT_allocated and set in type. */
25554 attr
= dwarf2_attr (die
, DW_AT_allocated
, cu
);
25555 if (attr_form_is_block (attr
))
25557 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25558 add_dyn_prop (DYN_PROP_ALLOCATED
, prop
, type
);
25560 else if (attr
!= NULL
)
25562 complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
25563 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25564 sect_offset_str (die
->sect_off
));
25567 /* Read DW_AT_associated and set in type. */
25568 attr
= dwarf2_attr (die
, DW_AT_associated
, cu
);
25569 if (attr_form_is_block (attr
))
25571 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25572 add_dyn_prop (DYN_PROP_ASSOCIATED
, prop
, type
);
25574 else if (attr
!= NULL
)
25576 complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
25577 (attr
!= NULL
? dwarf_form_name (attr
->form
) : "n/a"),
25578 sect_offset_str (die
->sect_off
));
25581 /* Read DW_AT_data_location and set in type. */
25582 attr
= dwarf2_attr (die
, DW_AT_data_location
, cu
);
25583 if (attr_to_dynamic_prop (attr
, die
, cu
, &prop
))
25584 add_dyn_prop (DYN_PROP_DATA_LOCATION
, prop
, type
);
25586 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25588 dwarf2_per_objfile
->die_type_hash
=
25589 htab_create_alloc_ex (127,
25590 per_cu_offset_and_type_hash
,
25591 per_cu_offset_and_type_eq
,
25593 &objfile
->objfile_obstack
,
25594 hashtab_obstack_allocate
,
25595 dummy_obstack_deallocate
);
25598 ofs
.per_cu
= cu
->per_cu
;
25599 ofs
.sect_off
= die
->sect_off
;
25601 slot
= (struct dwarf2_per_cu_offset_and_type
**)
25602 htab_find_slot (dwarf2_per_objfile
->die_type_hash
, &ofs
, INSERT
);
25604 complaint (_("A problem internal to GDB: DIE %s has type already set"),
25605 sect_offset_str (die
->sect_off
));
25606 *slot
= XOBNEW (&objfile
->objfile_obstack
,
25607 struct dwarf2_per_cu_offset_and_type
);
25612 /* Look up the type for the die at SECT_OFF in PER_CU in die_type_hash,
25613 or return NULL if the die does not have a saved type. */
25615 static struct type
*
25616 get_die_type_at_offset (sect_offset sect_off
,
25617 struct dwarf2_per_cu_data
*per_cu
)
25619 struct dwarf2_per_cu_offset_and_type
*slot
, ofs
;
25620 struct dwarf2_per_objfile
*dwarf2_per_objfile
= per_cu
->dwarf2_per_objfile
;
25622 if (dwarf2_per_objfile
->die_type_hash
== NULL
)
25625 ofs
.per_cu
= per_cu
;
25626 ofs
.sect_off
= sect_off
;
25627 slot
= ((struct dwarf2_per_cu_offset_and_type
*)
25628 htab_find (dwarf2_per_objfile
->die_type_hash
, &ofs
));
25635 /* Look up the type for DIE in CU in die_type_hash,
25636 or return NULL if DIE does not have a saved type. */
25638 static struct type
*
25639 get_die_type (struct die_info
*die
, struct dwarf2_cu
*cu
)
25641 return get_die_type_at_offset (die
->sect_off
, cu
->per_cu
);
25644 /* Add a dependence relationship from CU to REF_PER_CU. */
25647 dwarf2_add_dependence (struct dwarf2_cu
*cu
,
25648 struct dwarf2_per_cu_data
*ref_per_cu
)
25652 if (cu
->dependencies
== NULL
)
25654 = htab_create_alloc_ex (5, htab_hash_pointer
, htab_eq_pointer
,
25655 NULL
, &cu
->comp_unit_obstack
,
25656 hashtab_obstack_allocate
,
25657 dummy_obstack_deallocate
);
25659 slot
= htab_find_slot (cu
->dependencies
, ref_per_cu
, INSERT
);
25661 *slot
= ref_per_cu
;
25664 /* Subroutine of dwarf2_mark to pass to htab_traverse.
25665 Set the mark field in every compilation unit in the
25666 cache that we must keep because we are keeping CU. */
25669 dwarf2_mark_helper (void **slot
, void *data
)
25671 struct dwarf2_per_cu_data
*per_cu
;
25673 per_cu
= (struct dwarf2_per_cu_data
*) *slot
;
25675 /* cu->dependencies references may not yet have been ever read if QUIT aborts
25676 reading of the chain. As such dependencies remain valid it is not much
25677 useful to track and undo them during QUIT cleanups. */
25678 if (per_cu
->cu
== NULL
)
25681 if (per_cu
->cu
->mark
)
25683 per_cu
->cu
->mark
= true;
25685 if (per_cu
->cu
->dependencies
!= NULL
)
25686 htab_traverse (per_cu
->cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25691 /* Set the mark field in CU and in every other compilation unit in the
25692 cache that we must keep because we are keeping CU. */
25695 dwarf2_mark (struct dwarf2_cu
*cu
)
25700 if (cu
->dependencies
!= NULL
)
25701 htab_traverse (cu
->dependencies
, dwarf2_mark_helper
, NULL
);
25705 dwarf2_clear_marks (struct dwarf2_per_cu_data
*per_cu
)
25709 per_cu
->cu
->mark
= false;
25710 per_cu
= per_cu
->cu
->read_in_chain
;
25714 /* Trivial hash function for partial_die_info: the hash value of a DIE
25715 is its offset in .debug_info for this objfile. */
25718 partial_die_hash (const void *item
)
25720 const struct partial_die_info
*part_die
25721 = (const struct partial_die_info
*) item
;
25723 return to_underlying (part_die
->sect_off
);
25726 /* Trivial comparison function for partial_die_info structures: two DIEs
25727 are equal if they have the same offset. */
25730 partial_die_eq (const void *item_lhs
, const void *item_rhs
)
25732 const struct partial_die_info
*part_die_lhs
25733 = (const struct partial_die_info
*) item_lhs
;
25734 const struct partial_die_info
*part_die_rhs
25735 = (const struct partial_die_info
*) item_rhs
;
25737 return part_die_lhs
->sect_off
== part_die_rhs
->sect_off
;
25740 struct cmd_list_element
*set_dwarf_cmdlist
;
25741 struct cmd_list_element
*show_dwarf_cmdlist
;
25744 set_dwarf_cmd (const char *args
, int from_tty
)
25746 help_list (set_dwarf_cmdlist
, "maintenance set dwarf ", all_commands
,
25751 show_dwarf_cmd (const char *args
, int from_tty
)
25753 cmd_show_list (show_dwarf_cmdlist
, from_tty
, "");
25756 int dwarf_always_disassemble
;
25759 show_dwarf_always_disassemble (struct ui_file
*file
, int from_tty
,
25760 struct cmd_list_element
*c
, const char *value
)
25762 fprintf_filtered (file
,
25763 _("Whether to always disassemble "
25764 "DWARF expressions is %s.\n"),
25769 show_check_physname (struct ui_file
*file
, int from_tty
,
25770 struct cmd_list_element
*c
, const char *value
)
25772 fprintf_filtered (file
,
25773 _("Whether to check \"physname\" is %s.\n"),
25778 _initialize_dwarf2_read (void)
25780 add_prefix_cmd ("dwarf", class_maintenance
, set_dwarf_cmd
, _("\
25781 Set DWARF specific variables.\n\
25782 Configure DWARF variables such as the cache size"),
25783 &set_dwarf_cmdlist
, "maintenance set dwarf ",
25784 0/*allow-unknown*/, &maintenance_set_cmdlist
);
25786 add_prefix_cmd ("dwarf", class_maintenance
, show_dwarf_cmd
, _("\
25787 Show DWARF specific variables\n\
25788 Show DWARF variables such as the cache size"),
25789 &show_dwarf_cmdlist
, "maintenance show dwarf ",
25790 0/*allow-unknown*/, &maintenance_show_cmdlist
);
25792 add_setshow_zinteger_cmd ("max-cache-age", class_obscure
,
25793 &dwarf_max_cache_age
, _("\
25794 Set the upper bound on the age of cached DWARF compilation units."), _("\
25795 Show the upper bound on the age of cached DWARF compilation units."), _("\
25796 A higher limit means that cached compilation units will be stored\n\
25797 in memory longer, and more total memory will be used. Zero disables\n\
25798 caching, which can slow down startup."),
25800 show_dwarf_max_cache_age
,
25801 &set_dwarf_cmdlist
,
25802 &show_dwarf_cmdlist
);
25804 add_setshow_boolean_cmd ("always-disassemble", class_obscure
,
25805 &dwarf_always_disassemble
, _("\
25806 Set whether `info address' always disassembles DWARF expressions."), _("\
25807 Show whether `info address' always disassembles DWARF expressions."), _("\
25808 When enabled, DWARF expressions are always printed in an assembly-like\n\
25809 syntax. When disabled, expressions will be printed in a more\n\
25810 conversational style, when possible."),
25812 show_dwarf_always_disassemble
,
25813 &set_dwarf_cmdlist
,
25814 &show_dwarf_cmdlist
);
25816 add_setshow_zuinteger_cmd ("dwarf-read", no_class
, &dwarf_read_debug
, _("\
25817 Set debugging of the DWARF reader."), _("\
25818 Show debugging of the DWARF reader."), _("\
25819 When enabled (non-zero), debugging messages are printed during DWARF\n\
25820 reading and symtab expansion. A value of 1 (one) provides basic\n\
25821 information. A value greater than 1 provides more verbose information."),
25824 &setdebuglist
, &showdebuglist
);
25826 add_setshow_zuinteger_cmd ("dwarf-die", no_class
, &dwarf_die_debug
, _("\
25827 Set debugging of the DWARF DIE reader."), _("\
25828 Show debugging of the DWARF DIE reader."), _("\
25829 When enabled (non-zero), DIEs are dumped after they are read in.\n\
25830 The value is the maximum depth to print."),
25833 &setdebuglist
, &showdebuglist
);
25835 add_setshow_zuinteger_cmd ("dwarf-line", no_class
, &dwarf_line_debug
, _("\
25836 Set debugging of the dwarf line reader."), _("\
25837 Show debugging of the dwarf line reader."), _("\
25838 When enabled (non-zero), line number entries are dumped as they are read in.\n\
25839 A value of 1 (one) provides basic information.\n\
25840 A value greater than 1 provides more verbose information."),
25843 &setdebuglist
, &showdebuglist
);
25845 add_setshow_boolean_cmd ("check-physname", no_class
, &check_physname
, _("\
25846 Set cross-checking of \"physname\" code against demangler."), _("\
25847 Show cross-checking of \"physname\" code against demangler."), _("\
25848 When enabled, GDB's internal \"physname\" code is checked against\n\
25850 NULL
, show_check_physname
,
25851 &setdebuglist
, &showdebuglist
);
25853 add_setshow_boolean_cmd ("use-deprecated-index-sections",
25854 no_class
, &use_deprecated_index_sections
, _("\
25855 Set whether to use deprecated gdb_index sections."), _("\
25856 Show whether to use deprecated gdb_index sections."), _("\
25857 When enabled, deprecated .gdb_index sections are used anyway.\n\
25858 Normally they are ignored either because of a missing feature or\n\
25859 performance issue.\n\
25860 Warning: This option must be enabled before gdb reads the file."),
25863 &setlist
, &showlist
);
25865 dwarf2_locexpr_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25866 &dwarf2_locexpr_funcs
);
25867 dwarf2_loclist_index
= register_symbol_computed_impl (LOC_COMPUTED
,
25868 &dwarf2_loclist_funcs
);
25870 dwarf2_locexpr_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25871 &dwarf2_block_frame_base_locexpr_funcs
);
25872 dwarf2_loclist_block_index
= register_symbol_block_impl (LOC_BLOCK
,
25873 &dwarf2_block_frame_base_loclist_funcs
);
25876 selftests::register_test ("dw2_expand_symtabs_matching",
25877 selftests::dw2_expand_symtabs_matching::run_test
);